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Merge tag 'for-6.11/block-20240710' of git://git.kernel.dk/linux

Pull block updates from Jens Axboe:

 - NVMe updates via Keith:
     - Device initialization memory leak fixes (Keith)
     - More constants defined (Weiwen)
     - Target debugfs support (Hannes)
     - PCIe subsystem reset enhancements (Keith)
     - Queue-depth multipath policy (Redhat and PureStorage)
     - Implement get_unique_id (Christoph)
     - Authentication error fixes (Gaosheng)

 - MD updates via Song
     - sync_action fix and refactoring (Yu Kuai)
     - Various small fixes (Christoph Hellwig, Li Nan, and Ofir Gal, Yu
       Kuai, Benjamin Marzinski, Christophe JAILLET, Yang Li)

 - Fix loop detach/open race (Gulam)

 - Fix lower control limit for blk-throttle (Yu)

 - Add module descriptions to various drivers (Jeff)

 - Add support for atomic writes for block devices, and statx reporting
   for same. Includes SCSI and NVMe (John, Prasad, Alan)

 - Add IO priority information to block trace points (Dongliang)

 - Various zone improvements and tweaks (Damien)

 - mq-deadline tag reservation improvements (Bart)

 - Ignore direct reclaim swap writes in writeback throttling (Baokun)

 - Block integrity improvements and fixes (Anuj)

 - Add basic support for rust based block drivers. Has a dummy null_blk
   variant for now (Andreas)

 - Series converting driver settings to queue limits, and cleanups and
   fixes related to that (Christoph)

 - Cleanup for poking too deeply into the bvec internals, in preparation
   for DMA mapping API changes (Christoph)

 - Various minor tweaks and fixes (Jiapeng, John, Kanchan, Mikulas,
   Ming, Zhu, Damien, Christophe, Chaitanya)

* tag 'for-6.11/block-20240710' of git://git.kernel.dk/linux: (206 commits)
  floppy: add missing MODULE_DESCRIPTION() macro
  loop: add missing MODULE_DESCRIPTION() macro
  ublk_drv: add missing MODULE_DESCRIPTION() macro
  xen/blkback: add missing MODULE_DESCRIPTION() macro
  block/rnbd: Constify struct kobj_type
  block: take offset into account in blk_bvec_map_sg again
  block: fix get_max_segment_size() warning
  loop: Don't bother validating blocksize
  virtio_blk: Don't bother validating blocksize
  null_blk: Don't bother validating blocksize
  block: Validate logical block size in blk_validate_limits()
  virtio_blk: Fix default logical block size fallback
  nvmet-auth: fix nvmet_auth hash error handling
  nvme: implement ->get_unique_id
  block: pass a phys_addr_t to get_max_segment_size
  block: add a bvec_phys helper
  blk-lib: check for kill signal in ioctl BLKZEROOUT
  block: limit the Write Zeroes to manually writing zeroes fallback
  block: refacto blkdev_issue_zeroout
  block: move read-only and supported checks into (__)blkdev_issue_zeroout
  ...
This commit is contained in:
Linus Torvalds 2024-07-15 14:20:22 -07:00
commit 3e78198862
182 changed files with 5855 additions and 3684 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
.mailmap
View File

@ -690,6 +690,7 @@ Vivien Didelot <vivien.didelot@gmail.com> <vivien.didelot@savoirfairelinux.com>
Vlad Dogaru <ddvlad@gmail.com> <vlad.dogaru@intel.com>
Vladimir Davydov <vdavydov.dev@gmail.com> <vdavydov@parallels.com>
Vladimir Davydov <vdavydov.dev@gmail.com> <vdavydov@virtuozzo.com>
Weiwen Hu <huweiwen@linux.alibaba.com> <sehuww@mail.scut.edu.cn>
WeiXiong Liao <gmpy.liaowx@gmail.com> <liaoweixiong@allwinnertech.com>
Wen Gong <quic_wgong@quicinc.com> <wgong@codeaurora.org>
Wesley Cheng <quic_wcheng@quicinc.com> <wcheng@codeaurora.org>

53
Documentation/ABI/stable/sysfs-block
View File

@ -21,6 +21,59 @@ Description:
device is offset from the internal allocation unit's
natural alignment.
What: /sys/block/<disk>/atomic_write_max_bytes
Date: February 2024
Contact: Himanshu Madhani <himanshu.madhani@oracle.com>
Description:
[RO] This parameter specifies the maximum atomic write
size reported by the device. This parameter is relevant
for merging of writes, where a merged atomic write
operation must not exceed this number of bytes.
This parameter may be greater than the value in
atomic_write_unit_max_bytes as
atomic_write_unit_max_bytes will be rounded down to a
power-of-two and atomic_write_unit_max_bytes may also be
limited by some other queue limits, such as max_segments.
This parameter - along with atomic_write_unit_min_bytes
and atomic_write_unit_max_bytes - will not be larger than
max_hw_sectors_kb, but may be larger than max_sectors_kb.
What: /sys/block/<disk>/atomic_write_unit_min_bytes
Date: February 2024
Contact: Himanshu Madhani <himanshu.madhani@oracle.com>
Description:
[RO] This parameter specifies the smallest block which can
be written atomically with an atomic write operation. All
atomic write operations must begin at a
atomic_write_unit_min boundary and must be multiples of
atomic_write_unit_min. This value must be a power-of-two.
What: /sys/block/<disk>/atomic_write_unit_max_bytes
Date: February 2024
Contact: Himanshu Madhani <himanshu.madhani@oracle.com>
Description:
[RO] This parameter defines the largest block which can be
written atomically with an atomic write operation. This
value must be a multiple of atomic_write_unit_min and must
be a power-of-two. This value will not be larger than
atomic_write_max_bytes.
What: /sys/block/<disk>/atomic_write_boundary_bytes
Date: February 2024
Contact: Himanshu Madhani <himanshu.madhani@oracle.com>
Description:
[RO] A device may need to internally split an atomic write I/O
which straddles a given logical block address boundary. This
parameter specifies the size in bytes of the atomic boundary if
one is reported by the device. This value must be a
power-of-two and at least the size as in
atomic_write_unit_max_bytes.
Any attempt to merge atomic write I/Os must not result in a
merged I/O which crosses this boundary (if any).
What: /sys/block/<disk>/diskseq
Date: February 2021

49
Documentation/block/data-integrity.rst
View File

@ -153,18 +153,11 @@ bio_free() will automatically free the bip.
4.2 Block Device
----------------
Because the format of the protection data is tied to the physical
disk, each block device has been extended with a block integrity
profile (struct blk_integrity). This optional profile is registered
with the block layer using blk_integrity_register().
The profile contains callback functions for generating and verifying
the protection data, as well as getting and setting application tags.
The profile also contains a few constants to aid in completing,
merging and splitting the integrity metadata.
Block devices can set up the integrity information in the integrity
sub-struture of the queue_limits structure.
Layered block devices will need to pick a profile that's appropriate
for all subdevices. blk_integrity_compare() can help with that. DM
for all subdevices. queue_limits_stack_integrity() can help with that. DM
and MD linear, RAID0 and RAID1 are currently supported. RAID4/5/6
will require extra work due to the application tag.
@ -250,42 +243,6 @@ will require extra work due to the application tag.
integrity upon completion.
5.4 Registering A Block Device As Capable Of Exchanging Integrity Metadata
--------------------------------------------------------------------------
To enable integrity exchange on a block device the gendisk must be
registered as capable:
`int blk_integrity_register(gendisk, blk_integrity);`
The blk_integrity struct is a template and should contain the
following::
static struct blk_integrity my_profile = {
.name = "STANDARDSBODY-TYPE-VARIANT-CSUM",
.generate_fn = my_generate_fn,
.verify_fn = my_verify_fn,
.tuple_size = sizeof(struct my_tuple_size),
.tag_size = <tag bytes per hw sector>,
};
'name' is a text string which will be visible in sysfs. This is
part of the userland API so chose it carefully and never change
it. The format is standards body-type-variant.
E.g. T10-DIF-TYPE1-IP or T13-EPP-0-CRC.
'generate_fn' generates appropriate integrity metadata (for WRITE).
'verify_fn' verifies that the data buffer matches the integrity
metadata.
'tuple_size' must be set to match the size of the integrity
metadata per sector. I.e. 8 for DIF and EPP.
'tag_size' must be set to identify how many bytes of tag space
are available per hardware sector. For DIF this is either 2 or
0 depending on the value of the Control Mode Page ATO bit.
----------------------------------------------------------------------
2007-12-24 Martin K. Petersen <martin.petersen@oracle.com>

69
Documentation/block/writeback_cache_control.rst
View File

@ -46,41 +46,50 @@ worry if the underlying devices need any explicit cache flushing and how
the Forced Unit Access is implemented. The REQ_PREFLUSH and REQ_FUA flags
may both be set on a single bio.
Implementation details for bio based block drivers
--------------------------------------------------------------
These drivers will always see the REQ_PREFLUSH and REQ_FUA bits as they sit
directly below the submit_bio interface. For remapping drivers the REQ_FUA
bits need to be propagated to underlying devices, and a global flush needs
to be implemented for bios with the REQ_PREFLUSH bit set. For real device
drivers that do not have a volatile cache the REQ_PREFLUSH and REQ_FUA bits
on non-empty bios can simply be ignored, and REQ_PREFLUSH requests without
data can be completed successfully without doing any work. Drivers for
devices with volatile caches need to implement the support for these
flags themselves without any help from the block layer.
Implementation details for request_fn based block drivers
---------------------------------------------------------
Feature settings for block drivers
----------------------------------
For devices that do not support volatile write caches there is no driver
support required, the block layer completes empty REQ_PREFLUSH requests before
entering the driver and strips off the REQ_PREFLUSH and REQ_FUA bits from
requests that have a payload. For devices with volatile write caches the
driver needs to tell the block layer that it supports flushing caches by
doing::
requests that have a payload.
blk_queue_write_cache(sdkp->disk->queue, true, false);
For devices with volatile write caches the driver needs to tell the block layer
that it supports flushing caches by setting the
and handle empty REQ_OP_FLUSH requests in its prep_fn/request_fn. Note that
REQ_PREFLUSH requests with a payload are automatically turned into a sequence
of an empty REQ_OP_FLUSH request followed by the actual write by the block
layer. For devices that also support the FUA bit the block layer needs
to be told to pass through the REQ_FUA bit using::
BLK_FEAT_WRITE_CACHE
blk_queue_write_cache(sdkp->disk->queue, true, true);
flag in the queue_limits feature field. For devices that also support the FUA
bit the block layer needs to be told to pass on the REQ_FUA bit by also setting
the
and the driver must handle write requests that have the REQ_FUA bit set
in prep_fn/request_fn. If the FUA bit is not natively supported the block
layer turns it into an empty REQ_OP_FLUSH request after the actual write.
BLK_FEAT_FUA
flag in the features field of the queue_limits structure.
Implementation details for bio based block drivers
--------------------------------------------------
For bio based drivers the REQ_PREFLUSH and REQ_FUA bit are simply passed on to
the driver if the driver sets the BLK_FEAT_WRITE_CACHE flag and the driver
needs to handle them.
*NOTE*: The REQ_FUA bit also gets passed on when the BLK_FEAT_FUA flags is
_not_ set. Any bio based driver that sets BLK_FEAT_WRITE_CACHE also needs to
handle REQ_FUA.
For remapping drivers the REQ_FUA bits need to be propagated to underlying
devices, and a global flush needs to be implemented for bios with the
REQ_PREFLUSH bit set.
Implementation details for blk-mq drivers
-----------------------------------------
When the BLK_FEAT_WRITE_CACHE flag is set, REQ_OP_WRITE | REQ_PREFLUSH requests
with a payload are automatically turned into a sequence of a REQ_OP_FLUSH
request followed by the actual write by the block layer.
When the BLK_FEAT_FUA flags is set, the REQ_FUA bit is simply passed on for the
REQ_OP_WRITE request, else a REQ_OP_FLUSH request is sent by the block layer
after the completion of the write request for bio submissions with the REQ_FUA
bit set.

14
MAINTAINERS
View File

@ -3759,6 +3759,20 @@ F: include/linux/blk*
F: kernel/trace/blktrace.c
F: lib/sbitmap.c
BLOCK LAYER DEVICE DRIVER API [RUST]
M: Andreas Hindborg <a.hindborg@samsung.com>
R: Boqun Feng <boqun.feng@gmail.com>
L: linux-block@vger.kernel.org
L: rust-for-linux@vger.kernel.org
S: Supported
W: https://rust-for-linux.com
B: https://github.com/Rust-for-Linux/linux/issues
C: https://rust-for-linux.zulipchat.com/#narrow/stream/Block
T: git https://github.com/Rust-for-Linux/linux.git rust-block-next
F: drivers/block/rnull.rs
F: rust/kernel/block.rs
F: rust/kernel/block/
BLOCK2MTD DRIVER
M: Joern Engel <joern@lazybastard.org>
L: linux-mtd@lists.infradead.org

3
arch/m68k/emu/nfblock.c
View File

@ -71,7 +71,7 @@ static void nfhd_submit_bio(struct bio *bio)
len = bvec.bv_len;
len >>= 9;
nfhd_read_write(dev->id, 0, dir, sec >> shift, len >> shift,
page_to_phys(bvec.bv_page) + bvec.bv_offset);
bvec_phys(&bvec));
sec += len;
}
bio_endio(bio);
@ -98,6 +98,7 @@ static int __init nfhd_init_one(int id, u32 blocks, u32 bsize)
{
struct queue_limits lim = {
.logical_block_size = bsize,
.features = BLK_FEAT_ROTATIONAL,
};
struct nfhd_device *dev;
int dev_id = id - NFHD_DEV_OFFSET;

53
arch/um/drivers/ubd_kern.c
View File

@ -447,43 +447,31 @@ static int bulk_req_safe_read(
return n;
}
/* Called without dev->lock held, and only in interrupt context. */
static void ubd_handler(void)
static void ubd_end_request(struct io_thread_req *io_req)
{
int n;
int count;
while(1){
n = bulk_req_safe_read(
thread_fd,
irq_req_buffer,
&irq_remainder,
&irq_remainder_size,
UBD_REQ_BUFFER_SIZE
);
if (n < 0) {
if(n == -EAGAIN)
break;
printk(KERN_ERR "spurious interrupt in ubd_handler, "
"err = %d\n", -n);
return;
}
for (count = 0; count < n/sizeof(struct io_thread_req *); count++) {
struct io_thread_req *io_req = (*irq_req_buffer)[count];
if ((io_req->error == BLK_STS_NOTSUPP) && (req_op(io_req->req) == REQ_OP_DISCARD)) {
blk_queue_max_discard_sectors(io_req->req->q, 0);
blk_queue_max_write_zeroes_sectors(io_req->req->q, 0);
}
blk_mq_end_request(io_req->req, io_req->error);
kfree(io_req);
}
if (io_req->error == BLK_STS_NOTSUPP) {
if (req_op(io_req->req) == REQ_OP_DISCARD)
blk_queue_disable_discard(io_req->req->q);
else if (req_op(io_req->req) == REQ_OP_WRITE_ZEROES)
blk_queue_disable_write_zeroes(io_req->req->q);
}
blk_mq_end_request(io_req->req, io_req->error);
kfree(io_req);
}
static irqreturn_t ubd_intr(int irq, void *dev)
{
ubd_handler();
int len, i;
while ((len = bulk_req_safe_read(thread_fd, irq_req_buffer,
&irq_remainder, &irq_remainder_size,
UBD_REQ_BUFFER_SIZE)) >= 0) {
for (i = 0; i < len / sizeof(struct io_thread_req *); i++)
ubd_end_request((*irq_req_buffer)[i]);
}
if (len < 0 && len != -EAGAIN)
pr_err("spurious interrupt in %s, err = %d\n", __func__, len);
return IRQ_HANDLED;
}
@ -847,6 +835,7 @@ static int ubd_add(int n, char **error_out)
struct queue_limits lim = {
.max_segments = MAX_SG,
.seg_boundary_mask = PAGE_SIZE - 1,
.features = BLK_FEAT_WRITE_CACHE,
};
struct gendisk *disk;
int err = 0;
@ -893,8 +882,6 @@ static int ubd_add(int n, char **error_out)
goto out_cleanup_tags;
}
blk_queue_flag_set(QUEUE_FLAG_NONROT, disk->queue);
blk_queue_write_cache(disk->queue, true, false);
disk->major = UBD_MAJOR;
disk->first_minor = n << UBD_SHIFT;
disk->minors = 1 << UBD_SHIFT;

5
arch/xtensa/platforms/iss/simdisk.c
View File

@ -263,6 +263,9 @@ static const struct proc_ops simdisk_proc_ops = {
static int __init simdisk_setup(struct simdisk *dev, int which,
struct proc_dir_entry *procdir)
{
struct queue_limits lim = {
.features = BLK_FEAT_ROTATIONAL,
};
char tmp[2] = { '0' + which, 0 };
int err;
@ -271,7 +274,7 @@ static int __init simdisk_setup(struct simdisk *dev, int which,
spin_lock_init(&dev->lock);
dev->users = 0;
dev->gd = blk_alloc_disk(NULL, NUMA_NO_NODE);
dev->gd = blk_alloc_disk(&lim, NUMA_NO_NODE);
if (IS_ERR(dev->gd)) {
err = PTR_ERR(dev->gd);
goto out;

8
block/Kconfig
View File

@ -62,6 +62,8 @@ config BLK_DEV_BSGLIB
config BLK_DEV_INTEGRITY
bool "Block layer data integrity support"
select CRC_T10DIF
select CRC64_ROCKSOFT
help
Some storage devices allow extra information to be
stored/retrieved to help protect the data. The block layer
@ -72,12 +74,6 @@ config BLK_DEV_INTEGRITY
T10/SCSI Data Integrity Field or the T13/ATA External Path
Protection. If in doubt, say N.
config BLK_DEV_INTEGRITY_T10
tristate
depends on BLK_DEV_INTEGRITY
select CRC_T10DIF
select CRC64_ROCKSOFT
config BLK_DEV_WRITE_MOUNTED
bool "Allow writing to mounted block devices"
default y

3
block/Makefile
View File

@ -26,8 +26,7 @@ obj-$(CONFIG_MQ_IOSCHED_KYBER) += kyber-iosched.o
bfq-y := bfq-iosched.o bfq-wf2q.o bfq-cgroup.o
obj-$(CONFIG_IOSCHED_BFQ) += bfq.o
obj-$(CONFIG_BLK_DEV_INTEGRITY) += bio-integrity.o blk-integrity.o
obj-$(CONFIG_BLK_DEV_INTEGRITY_T10) += t10-pi.o
obj-$(CONFIG_BLK_DEV_INTEGRITY) += bio-integrity.o blk-integrity.o t10-pi.o
obj-$(CONFIG_BLK_MQ_PCI) += blk-mq-pci.o
obj-$(CONFIG_BLK_MQ_VIRTIO) += blk-mq-virtio.o
obj-$(CONFIG_BLK_DEV_ZONED) += blk-zoned.o

41
block/bdev.c
View File

@ -385,7 +385,7 @@ static struct file_system_type bd_type = {
};
struct super_block *blockdev_superblock __ro_after_init;
struct vfsmount *blockdev_mnt __ro_after_init;
static struct vfsmount *blockdev_mnt __ro_after_init;
EXPORT_SYMBOL_GPL(blockdev_superblock);
void __init bdev_cache_init(void)
@ -1260,23 +1260,42 @@ void sync_bdevs(bool wait)
}
/*
* Handle STATX_DIOALIGN for block devices.
*
* Note that the inode passed to this is the inode of a block device node file,
* not the block device's internal inode. Therefore it is *not* valid to use
* I_BDEV() here; the block device has to be looked up by i_rdev instead.
* Handle STATX_{DIOALIGN, WRITE_ATOMIC} for block devices.
*/
void bdev_statx_dioalign(struct inode *inode, struct kstat *stat)
void bdev_statx(struct path *path, struct kstat *stat,
u32 request_mask)
{
struct inode *backing_inode;
struct block_device *bdev;
bdev = blkdev_get_no_open(inode->i_rdev);
if (!(request_mask & (STATX_DIOALIGN | STATX_WRITE_ATOMIC)))
return;
backing_inode = d_backing_inode(path->dentry);
/*
* Note that backing_inode is the inode of a block device node file,
* not the block device's internal inode. Therefore it is *not* valid
* to use I_BDEV() here; the block device has to be looked up by i_rdev
* instead.
*/
bdev = blkdev_get_no_open(backing_inode->i_rdev);
if (!bdev)
return;
stat->dio_mem_align = bdev_dma_alignment(bdev) + 1;
stat->dio_offset_align = bdev_logical_block_size(bdev);
stat->result_mask |= STATX_DIOALIGN;
if (request_mask & STATX_DIOALIGN) {
stat->dio_mem_align = bdev_dma_alignment(bdev) + 1;
stat->dio_offset_align = bdev_logical_block_size(bdev);
stat->result_mask |= STATX_DIOALIGN;
}
if (request_mask & STATX_WRITE_ATOMIC && bdev_can_atomic_write(bdev)) {
struct request_queue *bd_queue = bdev->bd_queue;
generic_fill_statx_atomic_writes(stat,
queue_atomic_write_unit_min_bytes(bd_queue),
queue_atomic_write_unit_max_bytes(bd_queue));
}
blkdev_put_no_open(bdev);
}

51
block/bfq-cgroup.c
View File

@ -797,57 +797,6 @@ void bfq_bic_update_cgroup(struct bfq_io_cq *bic, struct bio *bio)
*/
bfq_link_bfqg(bfqd, bfqg);
__bfq_bic_change_cgroup(bfqd, bic, bfqg);
/*
* Update blkg_path for bfq_log_* functions. We cache this
* path, and update it here, for the following
* reasons. Operations on blkg objects in blk-cgroup are
* protected with the request_queue lock, and not with the
* lock that protects the instances of this scheduler
* (bfqd->lock). This exposes BFQ to the following sort of
* race.
*
* The blkg_lookup performed in bfq_get_queue, protected
* through rcu, may happen to return the address of a copy of
* the original blkg. If this is the case, then the
* bfqg_and_blkg_get performed in bfq_get_queue, to pin down
* the blkg, is useless: it does not prevent blk-cgroup code
* from destroying both the original blkg and all objects
* directly or indirectly referred by the copy of the
* blkg.
*
* On the bright side, destroy operations on a blkg invoke, as
* a first step, hooks of the scheduler associated with the
* blkg. And these hooks are executed with bfqd->lock held for
* BFQ. As a consequence, for any blkg associated with the
* request queue this instance of the scheduler is attached
* to, we are guaranteed that such a blkg is not destroyed, and
* that all the pointers it contains are consistent, while we
* are holding bfqd->lock. A blkg_lookup performed with
* bfqd->lock held then returns a fully consistent blkg, which
* remains consistent until this lock is held.
*
* Thanks to the last fact, and to the fact that: (1) bfqg has
* been obtained through a blkg_lookup in the above
* assignment, and (2) bfqd->lock is being held, here we can
* safely use the policy data for the involved blkg (i.e., the
* field bfqg->pd) to get to the blkg associated with bfqg,
* and then we can safely use any field of blkg. After we
* release bfqd->lock, even just getting blkg through this
* bfqg may cause dangling references to be traversed, as
* bfqg->pd may not exist any more.
*
* In view of the above facts, here we cache, in the bfqg, any
* blkg data we may need for this bic, and for its associated
* bfq_queue. As of now, we need to cache only the path of the
* blkg, which is used in the bfq_log_* functions.
*
* Finally, note that bfqg itself needs to be protected from
* destruction on the blkg_free of the original blkg (which
* invokes bfq_pd_free). We use an additional private
* refcounter for bfqg, to let it disappear only after no
* bfq_queue refers to it any longer.
*/
blkg_path(bfqg_to_blkg(bfqg), bfqg->blkg_path, sizeof(bfqg->blkg_path));
bic->blkcg_serial_nr = serial_nr;
}

46
block/bfq-iosched.c
View File

@ -5463,29 +5463,10 @@ static void bfq_exit_icq_bfqq(struct bfq_io_cq *bic, bool is_sync,
}
}
static void bfq_exit_icq(struct io_cq *icq)
static void _bfq_exit_icq(struct bfq_io_cq *bic, unsigned int num_actuators)
{
struct bfq_io_cq *bic = icq_to_bic(icq);
struct bfq_data *bfqd = bic_to_bfqd(bic);
unsigned long flags;
unsigned int act_idx;
/*
* If bfqd and thus bfqd->num_actuators is not available any
* longer, then cycle over all possible per-actuator bfqqs in
* next loop. We rely on bic being zeroed on creation, and
* therefore on its unused per-actuator fields being NULL.
*/
unsigned int num_actuators = BFQ_MAX_ACTUATORS;
struct bfq_iocq_bfqq_data *bfqq_data = bic->bfqq_data;
/*
* bfqd is NULL if scheduler already exited, and in that case
* this is the last time these queues are accessed.
*/
if (bfqd) {
spin_lock_irqsave(&bfqd->lock, flags);
num_actuators = bfqd->num_actuators;
}
unsigned int act_idx;
for (act_idx = 0; act_idx < num_actuators; act_idx++) {
if (bfqq_data[act_idx].stable_merge_bfqq)
@ -5494,9 +5475,30 @@ static void bfq_exit_icq(struct io_cq *icq)
bfq_exit_icq_bfqq(bic, true, act_idx);
bfq_exit_icq_bfqq(bic, false, act_idx);
}
}
if (bfqd)
static void bfq_exit_icq(struct io_cq *icq)
{
struct bfq_io_cq *bic = icq_to_bic(icq);
struct bfq_data *bfqd = bic_to_bfqd(bic);
unsigned long flags;
/*
* If bfqd and thus bfqd->num_actuators is not available any
* longer, then cycle over all possible per-actuator bfqqs in
* next loop. We rely on bic being zeroed on creation, and
* therefore on its unused per-actuator fields being NULL.
*
* bfqd is NULL if scheduler already exited, and in that case
* this is the last time these queues are accessed.
*/
if (bfqd) {
spin_lock_irqsave(&bfqd->lock, flags);
_bfq_exit_icq(bic, bfqd->num_actuators);
spin_unlock_irqrestore(&bfqd->lock, flags);
} else {
_bfq_exit_icq(bic, BFQ_MAX_ACTUATORS);
}
}
/*

3
block/bfq-iosched.h
View File

@ -1003,9 +1003,6 @@ struct bfq_group {
/* must be the first member */
struct blkg_policy_data pd;
/* cached path for this blkg (see comments in bfq_bic_update_cgroup) */
char blkg_path[128];
/* reference counter (see comments in bfq_bic_update_cgroup) */
refcount_t ref;

135
block/bio-integrity.c
View File

@ -76,7 +76,7 @@ struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio,
&bip->bip_max_vcnt, gfp_mask);
if (!bip->bip_vec)
goto err;
} else {
} else if (nr_vecs) {
bip->bip_vec = bip->bip_inline_vecs;
}
@ -276,6 +276,7 @@ static int bio_integrity_copy_user(struct bio *bio, struct bio_vec *bvec,
bip->bip_flags |= BIP_INTEGRITY_USER | BIP_COPY_USER;
bip->bip_iter.bi_sector = seed;
bip->bip_vcnt = nr_vecs;
return 0;
free_bip:
bio_integrity_free(bio);
@ -297,6 +298,7 @@ static int bio_integrity_init_user(struct bio *bio, struct bio_vec *bvec,
bip->bip_flags |= BIP_INTEGRITY_USER;
bip->bip_iter.bi_sector = seed;
bip->bip_iter.bi_size = len;
bip->bip_vcnt = nr_vecs;
return 0;
}
@ -334,7 +336,7 @@ int bio_integrity_map_user(struct bio *bio, void __user *ubuf, ssize_t bytes,
u32 seed)
{
struct request_queue *q = bdev_get_queue(bio->bi_bdev);
unsigned int align = q->dma_pad_mask | queue_dma_alignment(q);
unsigned int align = blk_lim_dma_alignment_and_pad(&q->limits);
struct page *stack_pages[UIO_FASTIOV], **pages = stack_pages;
struct bio_vec stack_vec[UIO_FASTIOV], *bvec = stack_vec;
unsigned int direction, nr_bvecs;
@ -396,44 +398,6 @@ free_bvec:
}
EXPORT_SYMBOL_GPL(bio_integrity_map_user);
/**
* bio_integrity_process - Process integrity metadata for a bio
* @bio: bio to generate/verify integrity metadata for
* @proc_iter: iterator to process
* @proc_fn: Pointer to the relevant processing function
*/
static blk_status_t bio_integrity_process(struct bio *bio,
struct bvec_iter *proc_iter, integrity_processing_fn *proc_fn)
{
struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk);
struct blk_integrity_iter iter;
struct bvec_iter bviter;
struct bio_vec bv;
struct bio_integrity_payload *bip = bio_integrity(bio);
blk_status_t ret = BLK_STS_OK;
iter.disk_name = bio->bi_bdev->bd_disk->disk_name;
iter.interval = 1 << bi->interval_exp;
iter.tuple_size = bi->tuple_size;
iter.seed = proc_iter->bi_sector;
iter.prot_buf = bvec_virt(bip->bip_vec);
iter.pi_offset = bi->pi_offset;
__bio_for_each_segment(bv, bio, bviter, *proc_iter) {
void *kaddr = bvec_kmap_local(&bv);
iter.data_buf = kaddr;
iter.data_size = bv.bv_len;
ret = proc_fn(&iter);
kunmap_local(kaddr);
if (ret)
break;
}
return ret;
}
/**
* bio_integrity_prep - Prepare bio for integrity I/O
* @bio: bio to prepare
@ -450,17 +414,13 @@ bool bio_integrity_prep(struct bio *bio)
{
struct bio_integrity_payload *bip;
struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk);
unsigned int len;
void *buf;
unsigned long start, end;
unsigned int len, nr_pages;
unsigned int bytes, offset, i;
gfp_t gfp = GFP_NOIO;
if (!bi)
return true;
if (bio_op(bio) != REQ_OP_READ && bio_op(bio) != REQ_OP_WRITE)
return true;
if (!bio_sectors(bio))
return true;
@ -468,32 +428,36 @@ bool bio_integrity_prep(struct bio *bio)
if (bio_integrity(bio))
return true;
if (bio_data_dir(bio) == READ) {
if (!bi->profile->verify_fn ||
!(bi->flags & BLK_INTEGRITY_VERIFY))
switch (bio_op(bio)) {
case REQ_OP_READ:
if (bi->flags & BLK_INTEGRITY_NOVERIFY)
return true;
} else {
if (!bi->profile->generate_fn ||
!(bi->flags & BLK_INTEGRITY_GENERATE))
break;
case REQ_OP_WRITE:
if (bi->flags & BLK_INTEGRITY_NOGENERATE)
return true;
/*
* Zero the memory allocated to not leak uninitialized kernel
* memory to disk for non-integrity metadata where nothing else
* initializes the memory.
*/
if (bi->csum_type == BLK_INTEGRITY_CSUM_NONE)
gfp |= __GFP_ZERO;
break;
default:
return true;
}
/* Allocate kernel buffer for protection data */
len = bio_integrity_bytes(bi, bio_sectors(bio));
buf = kmalloc(len, GFP_NOIO);
buf = kmalloc(len, gfp);
if (unlikely(buf == NULL)) {
printk(KERN_ERR "could not allocate integrity buffer\n");
goto err_end_io;
}
end = (((unsigned long) buf) + len + PAGE_SIZE - 1) >> PAGE_SHIFT;
start = ((unsigned long) buf) >> PAGE_SHIFT;
nr_pages = end - start;
/* Allocate bio integrity payload and integrity vectors */
bip = bio_integrity_alloc(bio, GFP_NOIO, nr_pages);
bip = bio_integrity_alloc(bio, GFP_NOIO, 1);
if (IS_ERR(bip)) {
printk(KERN_ERR "could not allocate data integrity bioset\n");
kfree(buf);
goto err_end_io;
}
@ -501,35 +465,20 @@ bool bio_integrity_prep(struct bio *bio)
bip->bip_flags |= BIP_BLOCK_INTEGRITY;
bip_set_seed(bip, bio->bi_iter.bi_sector);
if (bi->flags & BLK_INTEGRITY_IP_CHECKSUM)
if (bi->csum_type == BLK_INTEGRITY_CSUM_IP)
bip->bip_flags |= BIP_IP_CHECKSUM;
/* Map it */
offset = offset_in_page(buf);
for (i = 0; i < nr_pages && len > 0; i++) {
bytes = PAGE_SIZE - offset;
if (bytes > len)
bytes = len;
if (bio_integrity_add_page(bio, virt_to_page(buf),
bytes, offset) < bytes) {
printk(KERN_ERR "could not attach integrity payload\n");
goto err_end_io;
}
buf += bytes;
len -= bytes;
offset = 0;
if (bio_integrity_add_page(bio, virt_to_page(buf), len,
offset_in_page(buf)) < len) {
printk(KERN_ERR "could not attach integrity payload\n");
goto err_end_io;
}
/* Auto-generate integrity metadata if this is a write */
if (bio_data_dir(bio) == WRITE) {
bio_integrity_process(bio, &bio->bi_iter,
bi->profile->generate_fn);
} else {
if (bio_data_dir(bio) == WRITE)
blk_integrity_generate(bio);
else
bip->bio_iter = bio->bi_iter;
}
return true;
err_end_io:
@ -552,15 +501,8 @@ static void bio_integrity_verify_fn(struct work_struct *work)
struct bio_integrity_payload *bip =
container_of(work, struct bio_integrity_payload, bip_work);
struct bio *bio = bip->bip_bio;
struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk);
/*
* At the moment verify is called bio's iterator was advanced
* during split and completion, we need to rewind iterator to
* it's original position.
*/
bio->bi_status = bio_integrity_process(bio, &bip->bio_iter,
bi->profile->verify_fn);
blk_integrity_verify(bio);
bio_integrity_free(bio);
bio_endio(bio);
}
@ -582,7 +524,7 @@ bool __bio_integrity_endio(struct bio *bio)
struct bio_integrity_payload *bip = bio_integrity(bio);
if (bio_op(bio) == REQ_OP_READ && !bio->bi_status &&
(bip->bip_flags & BIP_BLOCK_INTEGRITY) && bi->profile->verify_fn) {
(bip->bip_flags & BIP_BLOCK_INTEGRITY) && bi->csum_type) {
INIT_WORK(&bip->bip_work, bio_integrity_verify_fn);
queue_work(kintegrityd_wq, &bip->bip_work);
return false;
@ -642,14 +584,11 @@ int bio_integrity_clone(struct bio *bio, struct bio *bio_src,
BUG_ON(bip_src == NULL);
bip = bio_integrity_alloc(bio, gfp_mask, bip_src->bip_vcnt);
bip = bio_integrity_alloc(bio, gfp_mask, 0);
if (IS_ERR(bip))
return PTR_ERR(bip);
memcpy(bip->bip_vec, bip_src->bip_vec,
bip_src->bip_vcnt * sizeof(struct bio_vec));
bip->bip_vcnt = bip_src->bip_vcnt;
bip->bip_vec = bip_src->bip_vec;
bip->bip_iter = bip_src->bip_iter;
bip->bip_flags = bip_src->bip_flags & ~BIP_BLOCK_INTEGRITY;

2
block/bio.c
View File

@ -953,7 +953,7 @@ bool bvec_try_merge_hw_page(struct request_queue *q, struct bio_vec *bv,
bool *same_page)
{
unsigned long mask = queue_segment_boundary(q);
phys_addr_t addr1 = page_to_phys(bv->bv_page) + bv->bv_offset;
phys_addr_t addr1 = bvec_phys(bv);
phys_addr_t addr2 = page_to_phys(page) + offset + len - 1;
if ((addr1 | mask) != (addr2 | mask))

13
block/blk-cgroup.h
View File

@ -300,19 +300,6 @@ static inline struct blkcg *cpd_to_blkcg(struct blkcg_policy_data *cpd)
return cpd ? cpd->blkcg : NULL;
}
/**
* blkg_path - format cgroup path of blkg
* @blkg: blkg of interest
* @buf: target buffer
* @buflen: target buffer length
*
* Format the path of the cgroup of @blkg into @buf.
*/
static inline int blkg_path(struct blkcg_gq *blkg, char *buf, int buflen)
{
return cgroup_path(blkg->blkcg->css.cgroup, buf, buflen);
}
/**
* blkg_get - get a blkg reference
* @blkg: blkg to get

45
block/blk-core.c
View File

@ -94,20 +94,6 @@ void blk_queue_flag_clear(unsigned int flag, struct request_queue *q)
}
EXPORT_SYMBOL(blk_queue_flag_clear);
/**
* blk_queue_flag_test_and_set - atomically test and set a queue flag
* @flag: flag to be set
* @q: request queue
*
* Returns the previous value of @flag - 0 if the flag was not set and 1 if
* the flag was already set.
*/
bool blk_queue_flag_test_and_set(unsigned int flag, struct request_queue *q)
{
return test_and_set_bit(flag, &q->queue_flags);
}
EXPORT_SYMBOL_GPL(blk_queue_flag_test_and_set);
#define REQ_OP_NAME(name) [REQ_OP_##name] = #name
static const char *const blk_op_name[] = {
REQ_OP_NAME(READ),
@ -174,6 +160,8 @@ static const struct {
/* Command duration limit device-side timeout */
[BLK_STS_DURATION_LIMIT] = { -ETIME, "duration limit exceeded" },
[BLK_STS_INVAL] = { -EINVAL, "invalid" },
/* everything else not covered above: */
[BLK_STS_IOERR] = { -EIO, "I/O" },
};
@ -739,6 +727,18 @@ void submit_bio_noacct_nocheck(struct bio *bio)
__submit_bio_noacct(bio);
}
static blk_status_t blk_validate_atomic_write_op_size(struct request_queue *q,
struct bio *bio)
{
if (bio->bi_iter.bi_size > queue_atomic_write_unit_max_bytes(q))
return BLK_STS_INVAL;
if (bio->bi_iter.bi_size % queue_atomic_write_unit_min_bytes(q))
return BLK_STS_INVAL;
return BLK_STS_OK;
}
/**
* submit_bio_noacct - re-submit a bio to the block device layer for I/O
* @bio: The bio describing the location in memory and on the device.
@ -782,7 +782,7 @@ void submit_bio_noacct(struct bio *bio)
if (WARN_ON_ONCE(bio_op(bio) != REQ_OP_WRITE &&
bio_op(bio) != REQ_OP_ZONE_APPEND))
goto end_io;
if (!test_bit(QUEUE_FLAG_WC, &q->queue_flags)) {
if (!bdev_write_cache(bdev)) {
bio->bi_opf &= ~(REQ_PREFLUSH | REQ_FUA);
if (!bio_sectors(bio)) {
status = BLK_STS_OK;
@ -791,12 +791,17 @@ void submit_bio_noacct(struct bio *bio)
}
}
if (!test_bit(QUEUE_FLAG_POLL, &q->queue_flags))
if (!(q->limits.features & BLK_FEAT_POLL))
bio_clear_polled(bio);
switch (bio_op(bio)) {
case REQ_OP_READ:
case REQ_OP_WRITE:
if (bio->bi_opf & REQ_ATOMIC) {
status = blk_validate_atomic_write_op_size(q, bio);
if (status != BLK_STS_OK)
goto end_io;
}
break;
case REQ_OP_FLUSH:
/*
@ -825,11 +830,8 @@ void submit_bio_noacct(struct bio *bio)
case REQ_OP_ZONE_OPEN:
case REQ_OP_ZONE_CLOSE:
case REQ_OP_ZONE_FINISH:
if (!bdev_is_zoned(bio->bi_bdev))
goto not_supported;
break;
case REQ_OP_ZONE_RESET_ALL:
if (!bdev_is_zoned(bio->bi_bdev) || !blk_queue_zone_resetall(q))
if (!bdev_is_zoned(bio->bi_bdev))
goto not_supported;
break;
case REQ_OP_DRV_IN:
@ -915,8 +917,7 @@ int bio_poll(struct bio *bio, struct io_comp_batch *iob, unsigned int flags)
return 0;
q = bdev_get_queue(bdev);
if (cookie == BLK_QC_T_NONE ||
!test_bit(QUEUE_FLAG_POLL, &q->queue_flags))
if (cookie == BLK_QC_T_NONE || !(q->limits.features & BLK_FEAT_POLL))
return 0;
blk_flush_plug(current->plug, false);

36
block/blk-flush.c
View File

@ -100,23 +100,6 @@ blk_get_flush_queue(struct request_queue *q, struct blk_mq_ctx *ctx)
return blk_mq_map_queue(q, REQ_OP_FLUSH, ctx)->fq;
}
static unsigned int blk_flush_policy(unsigned long fflags, struct request *rq)
{
unsigned int policy = 0;
if (blk_rq_sectors(rq))
policy |= REQ_FSEQ_DATA;
if (fflags & (1UL << QUEUE_FLAG_WC)) {
if (rq->cmd_flags & REQ_PREFLUSH)
policy |= REQ_FSEQ_PREFLUSH;
if (!(fflags & (1UL << QUEUE_FLAG_FUA)) &&
(rq->cmd_flags & REQ_FUA))
policy |= REQ_FSEQ_POSTFLUSH;
}
return policy;
}
static unsigned int blk_flush_cur_seq(struct request *rq)
{
return 1 << ffz(rq->flush.seq);
@ -399,19 +382,32 @@ static void blk_rq_init_flush(struct request *rq)
bool blk_insert_flush(struct request *rq)
{
struct request_queue *q = rq->q;
unsigned long fflags = q->queue_flags; /* may change, cache */
unsigned int policy = blk_flush_policy(fflags, rq);
struct blk_flush_queue *fq = blk_get_flush_queue(q, rq->mq_ctx);
bool supports_fua = q->limits.features & BLK_FEAT_FUA;
unsigned int policy = 0;
/* FLUSH/FUA request must never be merged */
WARN_ON_ONCE(rq->bio != rq->biotail);
if (blk_rq_sectors(rq))
policy |= REQ_FSEQ_DATA;
/*
* Check which flushes we need to sequence for this operation.
*/
if (blk_queue_write_cache(q)) {
if (rq->cmd_flags & REQ_PREFLUSH)
policy |= REQ_FSEQ_PREFLUSH;
if ((rq->cmd_flags & REQ_FUA) && !supports_fua)
policy |= REQ_FSEQ_POSTFLUSH;
}
/*
* @policy now records what operations need to be done. Adjust
* REQ_PREFLUSH and FUA for the driver.
*/
rq->cmd_flags &= ~REQ_PREFLUSH;
if (!(fflags & (1UL << QUEUE_FLAG_FUA)))
if (!supports_fua)
rq->cmd_flags &= ~REQ_FUA;
/*

228
block/blk-integrity.c
View File

@ -107,60 +107,6 @@ new_segment:
}
EXPORT_SYMBOL(blk_rq_map_integrity_sg);
/**
* blk_integrity_compare - Compare integrity profile of two disks
* @gd1: Disk to compare
* @gd2: Disk to compare
*
* Description: Meta-devices like DM and MD need to verify that all
* sub-devices use the same integrity format before advertising to
* upper layers that they can send/receive integrity metadata. This
* function can be used to check whether two gendisk devices have
* compatible integrity formats.
*/
int blk_integrity_compare(struct gendisk *gd1, struct gendisk *gd2)
{
struct blk_integrity *b1 = &gd1->queue->integrity;
struct blk_integrity *b2 = &gd2->queue->integrity;
if (!b1->profile && !b2->profile)
return 0;
if (!b1->profile || !b2->profile)
return -1;
if (b1->interval_exp != b2->interval_exp) {
pr_err("%s: %s/%s protection interval %u != %u\n",
__func__, gd1->disk_name, gd2->disk_name,
1 << b1->interval_exp, 1 << b2->interval_exp);
return -1;
}
if (b1->tuple_size != b2->tuple_size) {
pr_err("%s: %s/%s tuple sz %u != %u\n", __func__,
gd1->disk_name, gd2->disk_name,
b1->tuple_size, b2->tuple_size);
return -1;
}
if (b1->tag_size && b2->tag_size && (b1->tag_size != b2->tag_size)) {
pr_err("%s: %s/%s tag sz %u != %u\n", __func__,
gd1->disk_name, gd2->disk_name,
b1->tag_size, b2->tag_size);
return -1;
}
if (b1->profile != b2->profile) {
pr_err("%s: %s/%s type %s != %s\n", __func__,
gd1->disk_name, gd2->disk_name,
b1->profile->name, b2->profile->name);
return -1;
}
return 0;
}
EXPORT_SYMBOL(blk_integrity_compare);
bool blk_integrity_merge_rq(struct request_queue *q, struct request *req,
struct request *next)
{
@ -214,7 +160,64 @@ bool blk_integrity_merge_bio(struct request_queue *q, struct request *req,
static inline struct blk_integrity *dev_to_bi(struct device *dev)
{
return &dev_to_disk(dev)->queue->integrity;
return &dev_to_disk(dev)->queue->limits.integrity;
}
const char *blk_integrity_profile_name(struct blk_integrity *bi)
{
switch (bi->csum_type) {
case BLK_INTEGRITY_CSUM_IP:
if (bi->flags & BLK_INTEGRITY_REF_TAG)
return "T10-DIF-TYPE1-IP";
return "T10-DIF-TYPE3-IP";
case BLK_INTEGRITY_CSUM_CRC:
if (bi->flags & BLK_INTEGRITY_REF_TAG)
return "T10-DIF-TYPE1-CRC";
return "T10-DIF-TYPE3-CRC";
case BLK_INTEGRITY_CSUM_CRC64:
if (bi->flags & BLK_INTEGRITY_REF_TAG)
return "EXT-DIF-TYPE1-CRC64";
return "EXT-DIF-TYPE3-CRC64";
case BLK_INTEGRITY_CSUM_NONE:
break;
}
return "nop";
}
EXPORT_SYMBOL_GPL(blk_integrity_profile_name);
static ssize_t flag_store(struct device *dev, const char *page, size_t count,
unsigned char flag)
{
struct request_queue *q = dev_to_disk(dev)->queue;
struct queue_limits lim;
unsigned long val;
int err;
err = kstrtoul(page, 10, &val);
if (err)
return err;
/* note that the flags are inverted vs the values in the sysfs files */
lim = queue_limits_start_update(q);
if (val)
lim.integrity.flags &= ~flag;
else
lim.integrity.flags |= flag;
blk_mq_freeze_queue(q);
err = queue_limits_commit_update(q, &lim);
blk_mq_unfreeze_queue(q);
if (err)
return err;
return count;
}
static ssize_t flag_show(struct device *dev, char *page, unsigned char flag)
{
struct blk_integrity *bi = dev_to_bi(dev);
return sysfs_emit(page, "%d\n", !(bi->flags & flag));
}
static ssize_t format_show(struct device *dev, struct device_attribute *attr,
@ -222,9 +225,9 @@ static ssize_t format_show(struct device *dev, struct device_attribute *attr,
{
struct blk_integrity *bi = dev_to_bi(dev);
if (bi->profile && bi->profile->name)
return sysfs_emit(page, "%s\n", bi->profile->name);
return sysfs_emit(page, "none\n");
if (!bi->tuple_size)
return sysfs_emit(page, "none\n");
return sysfs_emit(page, "%s\n", blk_integrity_profile_name(bi));
}
static ssize_t tag_size_show(struct device *dev, struct device_attribute *attr,
@ -249,49 +252,26 @@ static ssize_t read_verify_store(struct device *dev,
struct device_attribute *attr,
const char *page, size_t count)
{
struct blk_integrity *bi = dev_to_bi(dev);
char *p = (char *) page;
unsigned long val = simple_strtoul(p, &p, 10);
if (val)
bi->flags |= BLK_INTEGRITY_VERIFY;
else
bi->flags &= ~BLK_INTEGRITY_VERIFY;
return count;
return flag_store(dev, page, count, BLK_INTEGRITY_NOVERIFY);
}
static ssize_t read_verify_show(struct device *dev,
struct device_attribute *attr, char *page)
{
struct blk_integrity *bi = dev_to_bi(dev);
return sysfs_emit(page, "%d\n", !!(bi->flags & BLK_INTEGRITY_VERIFY));
return flag_show(dev, page, BLK_INTEGRITY_NOVERIFY);
}
static ssize_t write_generate_store(struct device *dev,
struct device_attribute *attr,
const char *page, size_t count)
{
struct blk_integrity *bi = dev_to_bi(dev);
char *p = (char *) page;
unsigned long val = simple_strtoul(p, &p, 10);
if (val)
bi->flags |= BLK_INTEGRITY_GENERATE;
else
bi->flags &= ~BLK_INTEGRITY_GENERATE;
return count;
return flag_store(dev, page, count, BLK_INTEGRITY_NOGENERATE);
}
static ssize_t write_generate_show(struct device *dev,
struct device_attribute *attr, char *page)
{
struct blk_integrity *bi = dev_to_bi(dev);
return sysfs_emit(page, "%d\n", !!(bi->flags & BLK_INTEGRITY_GENERATE));
return flag_show(dev, page, BLK_INTEGRITY_NOGENERATE);
}
static ssize_t device_is_integrity_capable_show(struct device *dev,
@ -325,81 +305,3 @@ const struct attribute_group blk_integrity_attr_group = {
.name = "integrity",
.attrs = integrity_attrs,
};
static blk_status_t blk_integrity_nop_fn(struct blk_integrity_iter *iter)
{
return BLK_STS_OK;
}
static void blk_integrity_nop_prepare(struct request *rq)
{
}
static void blk_integrity_nop_complete(struct request *rq,
unsigned int nr_bytes)
{
}
static const struct blk_integrity_profile nop_profile = {
.name = "nop",
.generate_fn = blk_integrity_nop_fn,
.verify_fn = blk_integrity_nop_fn,
.prepare_fn = blk_integrity_nop_prepare,
.complete_fn = blk_integrity_nop_complete,
};
/**
* blk_integrity_register - Register a gendisk as being integrity-capable
* @disk: struct gendisk pointer to make integrity-aware
* @template: block integrity profile to register
*
* Description: When a device needs to advertise itself as being able to
* send/receive integrity metadata it must use this function to register
* the capability with the block layer. The template is a blk_integrity
* struct with values appropriate for the underlying hardware. See
* Documentation/block/data-integrity.rst.
*/
void blk_integrity_register(struct gendisk *disk, struct blk_integrity *template)
{
struct blk_integrity *bi = &disk->queue->integrity;
bi->flags = BLK_INTEGRITY_VERIFY | BLK_INTEGRITY_GENERATE |
template->flags;
bi->interval_exp = template->interval_exp ? :
ilog2(queue_logical_block_size(disk->queue));
bi->profile = template->profile ? template->profile : &nop_profile;
bi->tuple_size = template->tuple_size;
bi->tag_size = template->tag_size;
bi->pi_offset = template->pi_offset;
blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, disk->queue);
#ifdef CONFIG_BLK_INLINE_ENCRYPTION
if (disk->queue->crypto_profile) {
pr_warn("blk-integrity: Integrity and hardware inline encryption are not supported together. Disabling hardware inline encryption.\n");
disk->queue->crypto_profile = NULL;
}
#endif
}
EXPORT_SYMBOL(blk_integrity_register);
/**
* blk_integrity_unregister - Unregister block integrity profile
* @disk: disk whose integrity profile to unregister
*
* Description: This function unregisters the integrity capability from
* a block device.
*/
void blk_integrity_unregister(struct gendisk *disk)
{
struct blk_integrity *bi = &disk->queue->integrity;
if (!bi->profile)
return;
/* ensure all bios are off the integrity workqueue */
blk_flush_integrity();
blk_queue_flag_clear(QUEUE_FLAG_STABLE_WRITES, disk->queue);
memset(bi, 0, sizeof(*bi));
}
EXPORT_SYMBOL(blk_integrity_unregister);

210
block/blk-lib.c
View File

@ -103,38 +103,71 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
}
EXPORT_SYMBOL(blkdev_issue_discard);
static int __blkdev_issue_write_zeroes(struct block_device *bdev,
static sector_t bio_write_zeroes_limit(struct block_device *bdev)
{
sector_t bs_mask = (bdev_logical_block_size(bdev) >> 9) - 1;
return min(bdev_write_zeroes_sectors(bdev),
(UINT_MAX >> SECTOR_SHIFT) & ~bs_mask);
}
static void __blkdev_issue_write_zeroes(struct block_device *bdev,
sector_t sector, sector_t nr_sects, gfp_t gfp_mask,
struct bio **biop, unsigned flags)
{
struct bio *bio = *biop;
unsigned int max_sectors;
if (bdev_read_only(bdev))
return -EPERM;
/* Ensure that max_sectors doesn't overflow bi_size */
max_sectors = bdev_write_zeroes_sectors(bdev);
if (max_sectors == 0)
return -EOPNOTSUPP;
while (nr_sects) {
unsigned int len = min_t(sector_t, nr_sects, max_sectors);
unsigned int len = min_t(sector_t, nr_sects,
bio_write_zeroes_limit(bdev));
struct bio *bio;
bio = blk_next_bio(bio, bdev, 0, REQ_OP_WRITE_ZEROES, gfp_mask);
if ((flags & BLKDEV_ZERO_KILLABLE) &&
fatal_signal_pending(current))
break;
bio = bio_alloc(bdev, 0, REQ_OP_WRITE_ZEROES, gfp_mask);
bio->bi_iter.bi_sector = sector;
if (flags & BLKDEV_ZERO_NOUNMAP)
bio->bi_opf |= REQ_NOUNMAP;
bio->bi_iter.bi_size = len << SECTOR_SHIFT;
*biop = bio_chain_and_submit(*biop, bio);
nr_sects -= len;
sector += len;
cond_resched();
}
}
*biop = bio;
return 0;
static int blkdev_issue_write_zeroes(struct block_device *bdev, sector_t sector,
sector_t nr_sects, gfp_t gfp, unsigned flags)
{
struct bio *bio = NULL;
struct blk_plug plug;
int ret = 0;
blk_start_plug(&plug);
__blkdev_issue_write_zeroes(bdev, sector, nr_sects, gfp, &bio, flags);
if (bio) {
if ((flags & BLKDEV_ZERO_KILLABLE) &&
fatal_signal_pending(current)) {
bio_await_chain(bio);
blk_finish_plug(&plug);
return -EINTR;
}
ret = submit_bio_wait(bio);
bio_put(bio);
}
blk_finish_plug(&plug);
/*
* For some devices there is no non-destructive way to verify whether
* WRITE ZEROES is actually supported. These will clear the capability
* on an I/O error, in which case we'll turn any error into
* "not supported" here.
*/
if (ret && !bdev_write_zeroes_sectors(bdev))
return -EOPNOTSUPP;
return ret;
}
/*
@ -150,35 +183,63 @@ static unsigned int __blkdev_sectors_to_bio_pages(sector_t nr_sects)
return min(pages, (sector_t)BIO_MAX_VECS);
}
static int __blkdev_issue_zero_pages(struct block_device *bdev,
static void __blkdev_issue_zero_pages(struct block_device *bdev,
sector_t sector, sector_t nr_sects, gfp_t gfp_mask,
struct bio **biop)
struct bio **biop, unsigned int flags)
{
struct bio *bio = *biop;
int bi_size = 0;
unsigned int sz;
while (nr_sects) {
unsigned int nr_vecs = __blkdev_sectors_to_bio_pages(nr_sects);
struct bio *bio;
if (bdev_read_only(bdev))
return -EPERM;
while (nr_sects != 0) {
bio = blk_next_bio(bio, bdev, __blkdev_sectors_to_bio_pages(nr_sects),
REQ_OP_WRITE, gfp_mask);
bio = bio_alloc(bdev, nr_vecs, REQ_OP_WRITE, gfp_mask);
bio->bi_iter.bi_sector = sector;
while (nr_sects != 0) {
sz = min((sector_t) PAGE_SIZE, nr_sects << 9);
bi_size = bio_add_page(bio, ZERO_PAGE(0), sz, 0);
nr_sects -= bi_size >> 9;
sector += bi_size >> 9;
if (bi_size < sz)
if ((flags & BLKDEV_ZERO_KILLABLE) &&
fatal_signal_pending(current))
break;
do {
unsigned int len, added;
len = min_t(sector_t,
PAGE_SIZE, nr_sects << SECTOR_SHIFT);
added = bio_add_page(bio, ZERO_PAGE(0), len, 0);
if (added < len)
break;
}
nr_sects -= added >> SECTOR_SHIFT;
sector += added >> SECTOR_SHIFT;
} while (nr_sects);
*biop = bio_chain_and_submit(*biop, bio);
cond_resched();
}
}
*biop = bio;
return 0;
static int blkdev_issue_zero_pages(struct block_device *bdev, sector_t sector,
sector_t nr_sects, gfp_t gfp, unsigned flags)
{
struct bio *bio = NULL;
struct blk_plug plug;
int ret = 0;
if (flags & BLKDEV_ZERO_NOFALLBACK)
return -EOPNOTSUPP;
blk_start_plug(&plug);
__blkdev_issue_zero_pages(bdev, sector, nr_sects, gfp, &bio, flags);
if (bio) {
if ((flags & BLKDEV_ZERO_KILLABLE) &&
fatal_signal_pending(current)) {
bio_await_chain(bio);
blk_finish_plug(&plug);
return -EINTR;
}
ret = submit_bio_wait(bio);
bio_put(bio);
}
blk_finish_plug(&plug);
return ret;
}
/**
@ -204,20 +265,19 @@ int __blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
sector_t nr_sects, gfp_t gfp_mask, struct bio **biop,
unsigned flags)
{
int ret;
sector_t bs_mask;
if (bdev_read_only(bdev))
return -EPERM;
bs_mask = (bdev_logical_block_size(bdev) >> 9) - 1;
if ((sector | nr_sects) & bs_mask)
return -EINVAL;
ret = __blkdev_issue_write_zeroes(bdev, sector, nr_sects, gfp_mask,
biop, flags);
if (ret != -EOPNOTSUPP || (flags & BLKDEV_ZERO_NOFALLBACK))
return ret;
return __blkdev_issue_zero_pages(bdev, sector, nr_sects, gfp_mask,
biop);
if (bdev_write_zeroes_sectors(bdev)) {
__blkdev_issue_write_zeroes(bdev, sector, nr_sects,
gfp_mask, biop, flags);
} else {
if (flags & BLKDEV_ZERO_NOFALLBACK)
return -EOPNOTSUPP;
__blkdev_issue_zero_pages(bdev, sector, nr_sects, gfp_mask,
biop, flags);
}
return 0;
}
EXPORT_SYMBOL(__blkdev_issue_zeroout);
@ -237,51 +297,21 @@ EXPORT_SYMBOL(__blkdev_issue_zeroout);
int blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
sector_t nr_sects, gfp_t gfp_mask, unsigned flags)
{
int ret = 0;
sector_t bs_mask;
struct bio *bio;
struct blk_plug plug;
bool try_write_zeroes = !!bdev_write_zeroes_sectors(bdev);
int ret;
bs_mask = (bdev_logical_block_size(bdev) >> 9) - 1;
if ((sector | nr_sects) & bs_mask)
if ((sector | nr_sects) & ((bdev_logical_block_size(bdev) >> 9) - 1))
return -EINVAL;
if (bdev_read_only(bdev))
return -EPERM;
retry:
bio = NULL;
blk_start_plug(&plug);
if (try_write_zeroes) {
ret = __blkdev_issue_write_zeroes(bdev, sector, nr_sects,
gfp_mask, &bio, flags);
} else if (!(flags & BLKDEV_ZERO_NOFALLBACK)) {
ret = __blkdev_issue_zero_pages(bdev, sector, nr_sects,
gfp_mask, &bio);
} else {
/* No zeroing offload support */
ret = -EOPNOTSUPP;
}
if (ret == 0 && bio) {
ret = submit_bio_wait(bio);
bio_put(bio);
}
blk_finish_plug(&plug);
if (ret && try_write_zeroes) {
if (!(flags & BLKDEV_ZERO_NOFALLBACK)) {
try_write_zeroes = false;
goto retry;
}
if (!bdev_write_zeroes_sectors(bdev)) {
/*
* Zeroing offload support was indicated, but the
* device reported ILLEGAL REQUEST (for some devices
* there is no non-destructive way to verify whether
* WRITE ZEROES is actually supported).
*/
ret = -EOPNOTSUPP;
}
if (bdev_write_zeroes_sectors(bdev)) {
ret = blkdev_issue_write_zeroes(bdev, sector, nr_sects,
gfp_mask, flags);
if (ret != -EOPNOTSUPP)
return ret;
}
return ret;
return blkdev_issue_zero_pages(bdev, sector, nr_sects, gfp_mask, flags);
}
EXPORT_SYMBOL(blkdev_issue_zeroout);

2
block/blk-map.c
View File

@ -634,7 +634,7 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
const struct iov_iter *iter, gfp_t gfp_mask)
{
bool copy = false, map_bvec = false;
unsigned long align = q->dma_pad_mask | queue_dma_alignment(q);
unsigned long align = blk_lim_dma_alignment_and_pad(&q->limits);
struct bio *bio = NULL;
struct iov_iter i;
int ret = -EINVAL;

92
block/blk-merge.c
View File

@ -154,6 +154,19 @@ static struct bio *bio_split_write_zeroes(struct bio *bio,
return bio_split(bio, lim->max_write_zeroes_sectors, GFP_NOIO, bs);
}
static inline unsigned int blk_boundary_sectors(const struct queue_limits *lim,
bool is_atomic)
{
/*
* chunk_sectors must be a multiple of atomic_write_boundary_sectors if
* both non-zero.
*/
if (is_atomic && lim->atomic_write_boundary_sectors)
return lim->atomic_write_boundary_sectors;
return lim->chunk_sectors;
}
/*
* Return the maximum number of sectors from the start of a bio that may be
* submitted as a single request to a block device. If enough sectors remain,
@ -167,12 +180,23 @@ static inline unsigned get_max_io_size(struct bio *bio,
{
unsigned pbs = lim->physical_block_size >> SECTOR_SHIFT;
unsigned lbs = lim->logical_block_size >> SECTOR_SHIFT;
unsigned max_sectors = lim->max_sectors, start, end;
bool is_atomic = bio->bi_opf & REQ_ATOMIC;
unsigned boundary_sectors = blk_boundary_sectors(lim, is_atomic);
unsigned max_sectors, start, end;
if (lim->chunk_sectors) {
/*
* We ignore lim->max_sectors for atomic writes because it may less
* than the actual bio size, which we cannot tolerate.
*/
if (is_atomic)
max_sectors = lim->atomic_write_max_sectors;
else
max_sectors = lim->max_sectors;
if (boundary_sectors) {
max_sectors = min(max_sectors,
blk_chunk_sectors_left(bio->bi_iter.bi_sector,
lim->chunk_sectors));
blk_boundary_sectors_left(bio->bi_iter.bi_sector,
boundary_sectors));
}
start = bio->bi_iter.bi_sector & (pbs - 1);
@ -185,23 +209,22 @@ static inline unsigned get_max_io_size(struct bio *bio,
/**
* get_max_segment_size() - maximum number of bytes to add as a single segment
* @lim: Request queue limits.
* @start_page: See below.
* @offset: Offset from @start_page where to add a segment.
* @paddr: address of the range to add
* @len: maximum length available to add at @paddr
*
* Returns the maximum number of bytes that can be added as a single segment.
* Returns the maximum number of bytes of the range starting at @paddr that can
* be added to a single segment.
*/
static inline unsigned get_max_segment_size(const struct queue_limits *lim,
struct page *start_page, unsigned long offset)
phys_addr_t paddr, unsigned int len)
{
unsigned long mask = lim->seg_boundary_mask;
offset = mask & (page_to_phys(start_page) + offset);
/*
* Prevent an overflow if mask = ULONG_MAX and offset = 0 by adding 1
* after having calculated the minimum.
*/
return min(mask - offset, (unsigned long)lim->max_segment_size - 1) + 1;
return min_t(unsigned long, len,
min(lim->seg_boundary_mask - (lim->seg_boundary_mask & paddr),
(unsigned long)lim->max_segment_size - 1) + 1);
}
/**
@ -234,9 +257,7 @@ static bool bvec_split_segs(const struct queue_limits *lim,
unsigned seg_size = 0;
while (len && *nsegs < max_segs) {
seg_size = get_max_segment_size(lim, bv->bv_page,
bv->bv_offset + total_len);
seg_size = min(seg_size, len);
seg_size = get_max_segment_size(lim, bvec_phys(bv) + total_len, len);
(*nsegs)++;
total_len += seg_size;
@ -305,6 +326,11 @@ struct bio *bio_split_rw(struct bio *bio, const struct queue_limits *lim,
*segs = nsegs;
return NULL;
split:
if (bio->bi_opf & REQ_ATOMIC) {
bio->bi_status = BLK_STS_INVAL;
bio_endio(bio);
return ERR_PTR(-EINVAL);
}
/*
* We can't sanely support splitting for a REQ_NOWAIT bio. End it
* with EAGAIN if splitting is required and return an error pointer.
@ -465,8 +491,8 @@ static unsigned blk_bvec_map_sg(struct request_queue *q,
while (nbytes > 0) {
unsigned offset = bvec->bv_offset + total;
unsigned len = min(get_max_segment_size(&q->limits,
bvec->bv_page, offset), nbytes);
unsigned len = get_max_segment_size(&q->limits,
bvec_phys(bvec) + total, nbytes);
struct page *page = bvec->bv_page;
/*
@ -588,18 +614,22 @@ static inline unsigned int blk_rq_get_max_sectors(struct request *rq,
sector_t offset)
{
struct request_queue *q = rq->q;
unsigned int max_sectors;
struct queue_limits *lim = &q->limits;
unsigned int max_sectors, boundary_sectors;
bool is_atomic = rq->cmd_flags & REQ_ATOMIC;
if (blk_rq_is_passthrough(rq))
return q->limits.max_hw_sectors;
max_sectors = blk_queue_get_max_sectors(q, req_op(rq));
if (!q->limits.chunk_sectors ||
boundary_sectors = blk_boundary_sectors(lim, is_atomic);
max_sectors = blk_queue_get_max_sectors(rq);
if (!boundary_sectors ||
req_op(rq) == REQ_OP_DISCARD ||
req_op(rq) == REQ_OP_SECURE_ERASE)
return max_sectors;
return min(max_sectors,
blk_chunk_sectors_left(offset, q->limits.chunk_sectors));
blk_boundary_sectors_left(offset, boundary_sectors));
}
static inline int ll_new_hw_segment(struct request *req, struct bio *bio,
@ -797,6 +827,18 @@ static enum elv_merge blk_try_req_merge(struct request *req,
return ELEVATOR_NO_MERGE;
}
static bool blk_atomic_write_mergeable_rq_bio(struct request *rq,
struct bio *bio)
{
return (rq->cmd_flags & REQ_ATOMIC) == (bio->bi_opf & REQ_ATOMIC);
}
static bool blk_atomic_write_mergeable_rqs(struct request *rq,
struct request *next)
{
return (rq->cmd_flags & REQ_ATOMIC) == (next->cmd_flags & REQ_ATOMIC);
}
/*
* For non-mq, this has to be called with the request spinlock acquired.
* For mq with scheduling, the appropriate queue wide lock should be held.
@ -820,6 +862,9 @@ static struct request *attempt_merge(struct request_queue *q,
if (req->ioprio != next->ioprio)
return NULL;
if (!blk_atomic_write_mergeable_rqs(req, next))
return NULL;
/*
* If we are allowed to merge, then append bio list
* from next to rq and release next. merge_requests_fn
@ -951,6 +996,9 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio)
if (rq->ioprio != bio_prio(bio))
return false;
if (blk_atomic_write_mergeable_rq_bio(rq, bio) == false)
return false;
return true;
}

13
block/blk-mq-debugfs.c
View File

@ -84,28 +84,15 @@ static const char *const blk_queue_flag_name[] = {
QUEUE_FLAG_NAME(NOMERGES),
QUEUE_FLAG_NAME(SAME_COMP),
QUEUE_FLAG_NAME(FAIL_IO),
QUEUE_FLAG_NAME(NONROT),
QUEUE_FLAG_NAME(IO_STAT),
QUEUE_FLAG_NAME(NOXMERGES),
QUEUE_FLAG_NAME(ADD_RANDOM),
QUEUE_FLAG_NAME(SYNCHRONOUS),
QUEUE_FLAG_NAME(SAME_FORCE),
QUEUE_FLAG_NAME(INIT_DONE),
QUEUE_FLAG_NAME(STABLE_WRITES),
QUEUE_FLAG_NAME(POLL),
QUEUE_FLAG_NAME(WC),
QUEUE_FLAG_NAME(FUA),
QUEUE_FLAG_NAME(DAX),
QUEUE_FLAG_NAME(STATS),
QUEUE_FLAG_NAME(REGISTERED),
QUEUE_FLAG_NAME(QUIESCED),
QUEUE_FLAG_NAME(PCI_P2PDMA),
QUEUE_FLAG_NAME(ZONE_RESETALL),
QUEUE_FLAG_NAME(RQ_ALLOC_TIME),
QUEUE_FLAG_NAME(HCTX_ACTIVE),
QUEUE_FLAG_NAME(NOWAIT),
QUEUE_FLAG_NAME(SQ_SCHED),
QUEUE_FLAG_NAME(SKIP_TAGSET_QUIESCE),
};
#undef QUEUE_FLAG_NAME

89
block/blk-mq.c
View File

@ -448,6 +448,10 @@ static struct request *__blk_mq_alloc_requests(struct blk_mq_alloc_data *data)
if (data->cmd_flags & REQ_NOWAIT)
data->flags |= BLK_MQ_REQ_NOWAIT;
retry:
data->ctx = blk_mq_get_ctx(q);
data->hctx = blk_mq_map_queue(q, data->cmd_flags, data->ctx);
if (q->elevator) {
/*
* All requests use scheduler tags when an I/O scheduler is
@ -469,13 +473,9 @@ static struct request *__blk_mq_alloc_requests(struct blk_mq_alloc_data *data)
if (ops->limit_depth)
ops->limit_depth(data->cmd_flags, data);
}
}
retry:
data->ctx = blk_mq_get_ctx(q);
data->hctx = blk_mq_map_queue(q, data->cmd_flags, data->ctx);
if (!(data->rq_flags & RQF_SCHED_TAGS))
} else {
blk_mq_tag_busy(data->hctx);
}
if (data->flags & BLK_MQ_REQ_RESERVED)
data->rq_flags |= RQF_RESV;
@ -804,10 +804,8 @@ static void blk_complete_request(struct request *req)
if (!bio)
return;
#ifdef CONFIG_BLK_DEV_INTEGRITY
if (blk_integrity_rq(req) && req_op(req) == REQ_OP_READ)
req->q->integrity.profile->complete_fn(req, total_bytes);
#endif
blk_integrity_complete(req, total_bytes);
/*
* Upper layers may call blk_crypto_evict_key() anytime after the last
@ -875,11 +873,9 @@ bool blk_update_request(struct request *req, blk_status_t error,
if (!req->bio)
return false;
#ifdef CONFIG_BLK_DEV_INTEGRITY
if (blk_integrity_rq(req) && req_op(req) == REQ_OP_READ &&
error == BLK_STS_OK)
req->q->integrity.profile->complete_fn(req, nr_bytes);
#endif
blk_integrity_complete(req, nr_bytes);
/*
* Upper layers may call blk_crypto_evict_key() anytime after the last
@ -1264,10 +1260,9 @@ void blk_mq_start_request(struct request *rq)
WRITE_ONCE(rq->state, MQ_RQ_IN_FLIGHT);
rq->mq_hctx->tags->rqs[rq->tag] = rq;
#ifdef CONFIG_BLK_DEV_INTEGRITY
if (blk_integrity_rq(rq) && req_op(rq) == REQ_OP_WRITE)
q->integrity.profile->prepare_fn(rq);
#endif
blk_integrity_prepare(rq);
if (rq->bio && rq->bio->bi_opf & REQ_POLLED)
WRITE_ONCE(rq->bio->bi_cookie, rq->mq_hctx->queue_num);
}
@ -2914,6 +2909,17 @@ static void blk_mq_use_cached_rq(struct request *rq, struct blk_plug *plug,
INIT_LIST_HEAD(&rq->queuelist);
}
static bool bio_unaligned(const struct bio *bio, struct request_queue *q)
{
unsigned int bs_mask = queue_logical_block_size(q) - 1;
/* .bi_sector of any zero sized bio need to be initialized */
if ((bio->bi_iter.bi_size & bs_mask) ||
((bio->bi_iter.bi_sector << SECTOR_SHIFT) & bs_mask))
return true;
return false;
}
/**
* blk_mq_submit_bio - Create and send a request to block device.
* @bio: Bio pointer.
@ -2966,6 +2972,15 @@ void blk_mq_submit_bio(struct bio *bio)
return;
}
/*
* Device reconfiguration may change logical block size, so alignment
* check has to be done with queue usage counter held
*/
if (unlikely(bio_unaligned(bio, q))) {
bio_io_error(bio);
goto queue_exit;
}
if (unlikely(bio_may_exceed_limits(bio, &q->limits))) {
bio = __bio_split_to_limits(bio, &q->limits, &nr_segs);
if (!bio)
@ -3041,7 +3056,7 @@ queue_exit:
blk_status_t blk_insert_cloned_request(struct request *rq)
{
struct request_queue *q = rq->q;
unsigned int max_sectors = blk_queue_get_max_sectors(q, req_op(rq));
unsigned int max_sectors = blk_queue_get_max_sectors(rq);
unsigned int max_segments = blk_rq_get_max_segments(rq);
blk_status_t ret;
@ -4114,6 +4129,12 @@ void blk_mq_release(struct request_queue *q)
blk_mq_sysfs_deinit(q);
}
static bool blk_mq_can_poll(struct blk_mq_tag_set *set)
{
return set->nr_maps > HCTX_TYPE_POLL &&
set->map[HCTX_TYPE_POLL].nr_queues;
}
struct request_queue *blk_mq_alloc_queue(struct blk_mq_tag_set *set,
struct queue_limits *lim, void *queuedata)
{
@ -4121,7 +4142,13 @@ struct request_queue *blk_mq_alloc_queue(struct blk_mq_tag_set *set,
struct request_queue *q;
int ret;
q = blk_alloc_queue(lim ? lim : &default_lim, set->numa_node);
if (!lim)
lim = &default_lim;
lim->features |= BLK_FEAT_IO_STAT | BLK_FEAT_NOWAIT;
if (blk_mq_can_poll(set))
lim->features |= BLK_FEAT_POLL;
q = blk_alloc_queue(lim, set->numa_node);
if (IS_ERR(q))
return q;
q->queuedata = queuedata;
@ -4274,17 +4301,6 @@ static void blk_mq_realloc_hw_ctxs(struct blk_mq_tag_set *set,
mutex_unlock(&q->sysfs_lock);
}
static void blk_mq_update_poll_flag(struct request_queue *q)
{
struct blk_mq_tag_set *set = q->tag_set;
if (set->nr_maps > HCTX_TYPE_POLL &&
set->map[HCTX_TYPE_POLL].nr_queues)
blk_queue_flag_set(QUEUE_FLAG_POLL, q);
else
blk_queue_flag_clear(QUEUE_FLAG_POLL, q);
}
int blk_mq_init_allocated_queue(struct blk_mq_tag_set *set,
struct request_queue *q)
{
@ -4312,7 +4328,6 @@ int blk_mq_init_allocated_queue(struct blk_mq_tag_set *set,
q->tag_set = set;
q->queue_flags |= QUEUE_FLAG_MQ_DEFAULT;
blk_mq_update_poll_flag(q);
INIT_DELAYED_WORK(&q->requeue_work, blk_mq_requeue_work);
INIT_LIST_HEAD(&q->flush_list);
@ -4636,13 +4651,15 @@ int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr)
int ret;
unsigned long i;
if (WARN_ON_ONCE(!q->mq_freeze_depth))
return -EINVAL;
if (!set)
return -EINVAL;
if (q->nr_requests == nr)
return 0;
blk_mq_freeze_queue(q);
blk_mq_quiesce_queue(q);
ret = 0;
@ -4676,7 +4693,6 @@ int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr)
}
blk_mq_unquiesce_queue(q);
blk_mq_unfreeze_queue(q);
return ret;
}
@ -4798,8 +4814,10 @@ static void __blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set,
fallback:
blk_mq_update_queue_map(set);
list_for_each_entry(q, &set->tag_list, tag_set_list) {
struct queue_limits lim;
blk_mq_realloc_hw_ctxs(set, q);
blk_mq_update_poll_flag(q);
if (q->nr_hw_queues != set->nr_hw_queues) {
int i = prev_nr_hw_queues;
@ -4811,6 +4829,13 @@ fallback:
set->nr_hw_queues = prev_nr_hw_queues;
goto fallback;
}
lim = queue_limits_start_update(q);
if (blk_mq_can_poll(set))
lim.features |= BLK_FEAT_POLL;
else
lim.features &= ~BLK_FEAT_POLL;
if (queue_limits_commit_update(q, &lim) < 0)
pr_warn("updating the poll flag failed\n");
blk_mq_map_swqueue(q);
}

547
block/blk-settings.c
View File

@ -6,7 +6,7 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/bio.h>
#include <linux/blkdev.h>
#include <linux/blk-integrity.h>
#include <linux/pagemap.h>
#include <linux/backing-dev-defs.h>
#include <linux/gcd.h>
@ -55,7 +55,7 @@ void blk_set_stacking_limits(struct queue_limits *lim)
}
EXPORT_SYMBOL(blk_set_stacking_limits);
static void blk_apply_bdi_limits(struct backing_dev_info *bdi,
void blk_apply_bdi_limits(struct backing_dev_info *bdi,
struct queue_limits *lim)
{
/*
@ -68,7 +68,7 @@ static void blk_apply_bdi_limits(struct backing_dev_info *bdi,
static int blk_validate_zoned_limits(struct queue_limits *lim)
{
if (!lim->zoned) {
if (!(lim->features & BLK_FEAT_ZONED)) {
if (WARN_ON_ONCE(lim->max_open_zones) ||
WARN_ON_ONCE(lim->max_active_zones) ||
WARN_ON_ONCE(lim->zone_write_granularity) ||
@ -80,6 +80,14 @@ static int blk_validate_zoned_limits(struct queue_limits *lim)
if (WARN_ON_ONCE(!IS_ENABLED(CONFIG_BLK_DEV_ZONED)))
return -EINVAL;
/*
* Given that active zones include open zones, the maximum number of
* open zones cannot be larger than the maximum number of active zones.
*/
if (lim->max_active_zones &&
lim->max_open_zones > lim->max_active_zones)
return -EINVAL;
if (lim->zone_write_granularity < lim->logical_block_size)
lim->zone_write_granularity = lim->logical_block_size;
@ -97,6 +105,120 @@ static int blk_validate_zoned_limits(struct queue_limits *lim)
return 0;
}
static int blk_validate_integrity_limits(struct queue_limits *lim)
{
struct blk_integrity *bi = &lim->integrity;
if (!bi->tuple_size) {
if (bi->csum_type != BLK_INTEGRITY_CSUM_NONE ||
bi->tag_size || ((bi->flags & BLK_INTEGRITY_REF_TAG))) {
pr_warn("invalid PI settings.\n");
return -EINVAL;
}
return 0;
}
if (!IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)) {
pr_warn("integrity support disabled.\n");
return -EINVAL;
}
if (bi->csum_type == BLK_INTEGRITY_CSUM_NONE &&
(bi->flags & BLK_INTEGRITY_REF_TAG)) {
pr_warn("ref tag not support without checksum.\n");
return -EINVAL;
}
if (!bi->interval_exp)
bi->interval_exp = ilog2(lim->logical_block_size);
return 0;
}
/*
* Returns max guaranteed bytes which we can fit in a bio.
*
* We request that an atomic_write is ITER_UBUF iov_iter (so a single vector),
* so we assume that we can fit in at least PAGE_SIZE in a segment, apart from
* the first and last segments.
*/
static unsigned int blk_queue_max_guaranteed_bio(struct queue_limits *lim)
{
unsigned int max_segments = min(BIO_MAX_VECS, lim->max_segments);
unsigned int length;
length = min(max_segments, 2) * lim->logical_block_size;
if (max_segments > 2)
length += (max_segments - 2) * PAGE_SIZE;
return length;
}
static void blk_atomic_writes_update_limits(struct queue_limits *lim)
{
unsigned int unit_limit = min(lim->max_hw_sectors << SECTOR_SHIFT,
blk_queue_max_guaranteed_bio(lim));
unit_limit = rounddown_pow_of_two(unit_limit);
lim->atomic_write_max_sectors =
min(lim->atomic_write_hw_max >> SECTOR_SHIFT,
lim->max_hw_sectors);
lim->atomic_write_unit_min =
min(lim->atomic_write_hw_unit_min, unit_limit);
lim->atomic_write_unit_max =
min(lim->atomic_write_hw_unit_max, unit_limit);
lim->atomic_write_boundary_sectors =
lim->atomic_write_hw_boundary >> SECTOR_SHIFT;
}
static void blk_validate_atomic_write_limits(struct queue_limits *lim)
{
unsigned int boundary_sectors;
if (!lim->atomic_write_hw_max)
goto unsupported;
boundary_sectors = lim->atomic_write_hw_boundary >> SECTOR_SHIFT;
if (boundary_sectors) {
/*
* A feature of boundary support is that it disallows bios to
* be merged which would result in a merged request which
* crosses either a chunk sector or atomic write HW boundary,
* even though chunk sectors may be just set for performance.
* For simplicity, disallow atomic writes for a chunk sector
* which is non-zero and smaller than atomic write HW boundary.
* Furthermore, chunk sectors must be a multiple of atomic
* write HW boundary. Otherwise boundary support becomes
* complicated.
* Devices which do not conform to these rules can be dealt
* with if and when they show up.
*/
if (WARN_ON_ONCE(lim->chunk_sectors % boundary_sectors))
goto unsupported;
/*
* The boundary size just needs to be a multiple of unit_max
* (and not necessarily a power-of-2), so this following check
* could be relaxed in future.
* Furthermore, if needed, unit_max could even be reduced so
* that it is compliant with a !power-of-2 boundary.
*/
if (!is_power_of_2(boundary_sectors))
goto unsupported;
}
blk_atomic_writes_update_limits(lim);
return;
unsupported:
lim->atomic_write_max_sectors = 0;
lim->atomic_write_boundary_sectors = 0;
lim->atomic_write_unit_min = 0;
lim->atomic_write_unit_max = 0;
}
/*
* Check that the limits in lim are valid, initialize defaults for unset
* values, and cap values based on others where needed.
@ -105,6 +227,7 @@ static int blk_validate_limits(struct queue_limits *lim)
{
unsigned int max_hw_sectors;
unsigned int logical_block_sectors;
int err;
/*
* Unless otherwise specified, default to 512 byte logical blocks and a
@ -112,6 +235,10 @@ static int blk_validate_limits(struct queue_limits *lim)
*/
if (!lim->logical_block_size)
lim->logical_block_size = SECTOR_SIZE;
else if (blk_validate_block_size(lim->logical_block_size)) {
pr_warn("Invalid logical block size (%d)\n", lim->logical_block_size);
return -EINVAL;
}
if (lim->physical_block_size < lim->logical_block_size)
lim->physical_block_size = lim->logical_block_size;
@ -153,6 +280,12 @@ static int blk_validate_limits(struct queue_limits *lim)
if (lim->max_user_sectors < PAGE_SIZE / SECTOR_SIZE)
return -EINVAL;
lim->max_sectors = min(max_hw_sectors, lim->max_user_sectors);
} else if (lim->io_opt > (BLK_DEF_MAX_SECTORS_CAP << SECTOR_SHIFT)) {
lim->max_sectors =
min(max_hw_sectors, lim->io_opt >> SECTOR_SHIFT);
} else if (lim->io_min > (BLK_DEF_MAX_SECTORS_CAP << SECTOR_SHIFT)) {
lim->max_sectors =
min(max_hw_sectors, lim->io_min >> SECTOR_SHIFT);
} else {
lim->max_sectors = min(max_hw_sectors, BLK_DEF_MAX_SECTORS_CAP);
}
@ -220,9 +353,17 @@ static int blk_validate_limits(struct queue_limits *lim)
if (lim->alignment_offset) {
lim->alignment_offset &= (lim->physical_block_size - 1);
lim->misaligned = 0;
lim->flags &= ~BLK_FLAG_MISALIGNED;
}
if (!(lim->features & BLK_FEAT_WRITE_CACHE))
lim->features &= ~BLK_FEAT_FUA;
blk_validate_atomic_write_limits(lim);
err = blk_validate_integrity_limits(lim);
if (err)
return err;
return blk_validate_zoned_limits(lim);
}
@ -254,15 +395,25 @@ int blk_set_default_limits(struct queue_limits *lim)
*/
int queue_limits_commit_update(struct request_queue *q,
struct queue_limits *lim)
__releases(q->limits_lock)
{
int error = blk_validate_limits(lim);
int error;
if (!error) {
q->limits = *lim;
if (q->disk)
blk_apply_bdi_limits(q->disk->bdi, lim);
error = blk_validate_limits(lim);
if (error)
goto out_unlock;
#ifdef CONFIG_BLK_INLINE_ENCRYPTION
if (q->crypto_profile && lim->integrity.tag_size) {
pr_warn("blk-integrity: Integrity and hardware inline encryption are not supported together.\n");
error = -EINVAL;
goto out_unlock;
}
#endif
q->limits = *lim;
if (q->disk)
blk_apply_bdi_limits(q->disk->bdi, lim);
out_unlock:
mutex_unlock(&q->limits_lock);
return error;
}
@ -286,204 +437,6 @@ int queue_limits_set(struct request_queue *q, struct queue_limits *lim)
}
EXPORT_SYMBOL_GPL(queue_limits_set);
/**
* blk_queue_chunk_sectors - set size of the chunk for this queue
* @q: the request queue for the device
* @chunk_sectors: chunk sectors in the usual 512b unit
*
* Description:
* If a driver doesn't want IOs to cross a given chunk size, it can set
* this limit and prevent merging across chunks. Note that the block layer
* must accept a page worth of data at any offset. So if the crossing of
* chunks is a hard limitation in the driver, it must still be prepared
* to split single page bios.
**/
void blk_queue_chunk_sectors(struct request_queue *q, unsigned int chunk_sectors)
{
q->limits.chunk_sectors = chunk_sectors;
}
EXPORT_SYMBOL(blk_queue_chunk_sectors);
/**
* blk_queue_max_discard_sectors - set max sectors for a single discard
* @q: the request queue for the device
* @max_discard_sectors: maximum number of sectors to discard
**/
void blk_queue_max_discard_sectors(struct request_queue *q,
unsigned int max_discard_sectors)
{
struct queue_limits *lim = &q->limits;
lim->max_hw_discard_sectors = max_discard_sectors;
lim->max_discard_sectors =
min(max_discard_sectors, lim->max_user_discard_sectors);
}
EXPORT_SYMBOL(blk_queue_max_discard_sectors);
/**
* blk_queue_max_secure_erase_sectors - set max sectors for a secure erase
* @q: the request queue for the device
* @max_sectors: maximum number of sectors to secure_erase
**/
void blk_queue_max_secure_erase_sectors(struct request_queue *q,
unsigned int max_sectors)
{
q->limits.max_secure_erase_sectors = max_sectors;
}
EXPORT_SYMBOL(blk_queue_max_secure_erase_sectors);
/**
* blk_queue_max_write_zeroes_sectors - set max sectors for a single
* write zeroes
* @q: the request queue for the device
* @max_write_zeroes_sectors: maximum number of sectors to write per command
**/
void blk_queue_max_write_zeroes_sectors(struct request_queue *q,
unsigned int max_write_zeroes_sectors)
{
q->limits.max_write_zeroes_sectors = max_write_zeroes_sectors;
}
EXPORT_SYMBOL(blk_queue_max_write_zeroes_sectors);
/**
* blk_queue_max_zone_append_sectors - set max sectors for a single zone append
* @q: the request queue for the device
* @max_zone_append_sectors: maximum number of sectors to write per command
*
* Sets the maximum number of sectors allowed for zone append commands. If
* Specifying 0 for @max_zone_append_sectors indicates that the queue does
* not natively support zone append operations and that the block layer must
* emulate these operations using regular writes.
**/
void blk_queue_max_zone_append_sectors(struct request_queue *q,
unsigned int max_zone_append_sectors)
{
unsigned int max_sectors = 0;
if (WARN_ON(!blk_queue_is_zoned(q)))
return;
if (max_zone_append_sectors) {
max_sectors = min(q->limits.max_hw_sectors,
max_zone_append_sectors);
max_sectors = min(q->limits.chunk_sectors, max_sectors);
/*
* Signal eventual driver bugs resulting in the max_zone_append
* sectors limit being 0 due to the chunk_sectors limit (zone
* size) not set or the max_hw_sectors limit not set.
*/
WARN_ON_ONCE(!max_sectors);
}
q->limits.max_zone_append_sectors = max_sectors;
}
EXPORT_SYMBOL_GPL(blk_queue_max_zone_append_sectors);
/**
* blk_queue_logical_block_size - set logical block size for the queue
* @q: the request queue for the device
* @size: the logical block size, in bytes
*
* Description:
* This should be set to the lowest possible block size that the
* storage device can address. The default of 512 covers most
* hardware.
**/
void blk_queue_logical_block_size(struct request_queue *q, unsigned int size)
{
struct queue_limits *limits = &q->limits;
limits->logical_block_size = size;
if (limits->discard_granularity < limits->logical_block_size)
limits->discard_granularity = limits->logical_block_size;
if (limits->physical_block_size < size)
limits->physical_block_size = size;
if (limits->io_min < limits->physical_block_size)
limits->io_min = limits->physical_block_size;
limits->max_hw_sectors =
round_down(limits->max_hw_sectors, size >> SECTOR_SHIFT);
limits->max_sectors =
round_down(limits->max_sectors, size >> SECTOR_SHIFT);
}
EXPORT_SYMBOL(blk_queue_logical_block_size);
/**
* blk_queue_physical_block_size - set physical block size for the queue
* @q: the request queue for the device
* @size: the physical block size, in bytes
*
* Description:
* This should be set to the lowest possible sector size that the
* hardware can operate on without reverting to read-modify-write
* operations.
*/
void blk_queue_physical_block_size(struct request_queue *q, unsigned int size)
{
q->limits.physical_block_size = size;
if (q->limits.physical_block_size < q->limits.logical_block_size)
q->limits.physical_block_size = q->limits.logical_block_size;
if (q->limits.discard_granularity < q->limits.physical_block_size)
q->limits.discard_granularity = q->limits.physical_block_size;
if (q->limits.io_min < q->limits.physical_block_size)
q->limits.io_min = q->limits.physical_block_size;
}
EXPORT_SYMBOL(blk_queue_physical_block_size);
/**
* blk_queue_zone_write_granularity - set zone write granularity for the queue
* @q: the request queue for the zoned device
* @size: the zone write granularity size, in bytes
*
* Description:
* This should be set to the lowest possible size allowing to write in
* sequential zones of a zoned block device.
*/
void blk_queue_zone_write_granularity(struct request_queue *q,
unsigned int size)
{
if (WARN_ON_ONCE(!blk_queue_is_zoned(q)))
return;
q->limits.zone_write_granularity = size;
if (q->limits.zone_write_granularity < q->limits.logical_block_size)
q->limits.zone_write_granularity = q->limits.logical_block_size;
}
EXPORT_SYMBOL_GPL(blk_queue_zone_write_granularity);
/**
* blk_queue_alignment_offset - set physical block alignment offset
* @q: the request queue for the device
* @offset: alignment offset in bytes
*
* Description:
* Some devices are naturally misaligned to compensate for things like
* the legacy DOS partition table 63-sector offset. Low-level drivers
* should call this function for devices whose first sector is not
* naturally aligned.
*/
void blk_queue_alignment_offset(struct request_queue *q, unsigned int offset)
{
q->limits.alignment_offset =
offset & (q->limits.physical_block_size - 1);
q->limits.misaligned = 0;
}
EXPORT_SYMBOL(blk_queue_alignment_offset);
void disk_update_readahead(struct gendisk *disk)
{
blk_apply_bdi_limits(disk->bdi, &disk->queue->limits);
}
EXPORT_SYMBOL_GPL(disk_update_readahead);
/**
* blk_limits_io_min - set minimum request size for a device
* @limits: the queue limits
@ -507,26 +460,6 @@ void blk_limits_io_min(struct queue_limits *limits, unsigned int min)
}
EXPORT_SYMBOL(blk_limits_io_min);
/**
* blk_queue_io_min - set minimum request size for the queue
* @q: the request queue for the device
* @min: smallest I/O size in bytes
*
* Description:
* Storage devices may report a granularity or preferred minimum I/O
* size which is the smallest request the device can perform without
* incurring a performance penalty. For disk drives this is often the
* physical block size. For RAID arrays it is often the stripe chunk
* size. A properly aligned multiple of minimum_io_size is the
* preferred request size for workloads where a high number of I/O
* operations is desired.
*/
void blk_queue_io_min(struct request_queue *q, unsigned int min)
{
blk_limits_io_min(&q->limits, min);
}
EXPORT_SYMBOL(blk_queue_io_min);
/**
* blk_limits_io_opt - set optimal request size for a device
* @limits: the queue limits
@ -614,6 +547,21 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
{
unsigned int top, bottom, alignment, ret = 0;
t->features |= (b->features & BLK_FEAT_INHERIT_MASK);
/*
* BLK_FEAT_NOWAIT and BLK_FEAT_POLL need to be supported both by the
* stacking driver and all underlying devices. The stacking driver sets
* the flags before stacking the limits, and this will clear the flags
* if any of the underlying devices does not support it.
*/
if (!(b->features & BLK_FEAT_NOWAIT))
t->features &= ~BLK_FEAT_NOWAIT;
if (!(b->features & BLK_FEAT_POLL))
t->features &= ~BLK_FEAT_POLL;
t->flags |= (b->flags & BLK_FLAG_MISALIGNED);
t->max_sectors = min_not_zero(t->max_sectors, b->max_sectors);
t->max_user_sectors = min_not_zero(t->max_user_sectors,
b->max_user_sectors);
@ -623,7 +571,6 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
b->max_write_zeroes_sectors);
t->max_zone_append_sectors = min(queue_limits_max_zone_append_sectors(t),
queue_limits_max_zone_append_sectors(b));
t->bounce = max(t->bounce, b->bounce);
t->seg_boundary_mask = min_not_zero(t->seg_boundary_mask,
b->seg_boundary_mask);
@ -639,8 +586,6 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
t->max_segment_size = min_not_zero(t->max_segment_size,
b->max_segment_size);
t->misaligned |= b->misaligned;
alignment = queue_limit_alignment_offset(b, start);
/* Bottom device has different alignment. Check that it is
@ -654,7 +599,7 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
/* Verify that top and bottom intervals line up */
if (max(top, bottom) % min(top, bottom)) {
t->misaligned = 1;
t->flags |= BLK_FLAG_MISALIGNED;
ret = -1;
}
}
@ -676,42 +621,38 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
/* Physical block size a multiple of the logical block size? */
if (t->physical_block_size & (t->logical_block_size - 1)) {
t->physical_block_size = t->logical_block_size;
t->misaligned = 1;
t->flags |= BLK_FLAG_MISALIGNED;
ret = -1;
}
/* Minimum I/O a multiple of the physical block size? */
if (t->io_min & (t->physical_block_size - 1)) {
t->io_min = t->physical_block_size;
t->misaligned = 1;
t->flags |= BLK_FLAG_MISALIGNED;
ret = -1;
}
/* Optimal I/O a multiple of the physical block size? */
if (t->io_opt & (t->physical_block_size - 1)) {
t->io_opt = 0;
t->misaligned = 1;
t->flags |= BLK_FLAG_MISALIGNED;
ret = -1;
}
/* chunk_sectors a multiple of the physical block size? */
if ((t->chunk_sectors << 9) & (t->physical_block_size - 1)) {
t->chunk_sectors = 0;
t->misaligned = 1;
t->flags |= BLK_FLAG_MISALIGNED;
ret = -1;
}
t->raid_partial_stripes_expensive =
max(t->raid_partial_stripes_expensive,
b->raid_partial_stripes_expensive);
/* Find lowest common alignment_offset */
t->alignment_offset = lcm_not_zero(t->alignment_offset, alignment)
% max(t->physical_block_size, t->io_min);
/* Verify that new alignment_offset is on a logical block boundary */
if (t->alignment_offset & (t->logical_block_size - 1)) {
t->misaligned = 1;
t->flags |= BLK_FLAG_MISALIGNED;
ret = -1;
}
@ -723,16 +664,6 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
if (b->discard_granularity) {
alignment = queue_limit_discard_alignment(b, start);
if (t->discard_granularity != 0 &&
t->discard_alignment != alignment) {
top = t->discard_granularity + t->discard_alignment;
bottom = b->discard_granularity + alignment;
/* Verify that top and bottom intervals line up */
if ((max(top, bottom) % min(top, bottom)) != 0)
t->discard_misaligned = 1;
}
t->max_discard_sectors = min_not_zero(t->max_discard_sectors,
b->max_discard_sectors);
t->max_hw_discard_sectors = min_not_zero(t->max_hw_discard_sectors,
@ -746,8 +677,7 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
b->max_secure_erase_sectors);
t->zone_write_granularity = max(t->zone_write_granularity,
b->zone_write_granularity);
t->zoned = max(t->zoned, b->zoned);
if (!t->zoned) {
if (!(t->features & BLK_FEAT_ZONED)) {
t->zone_write_granularity = 0;
t->max_zone_append_sectors = 0;
}
@ -781,21 +711,65 @@ void queue_limits_stack_bdev(struct queue_limits *t, struct block_device *bdev,
EXPORT_SYMBOL_GPL(queue_limits_stack_bdev);
/**
* blk_queue_update_dma_pad - update pad mask
* @q: the request queue for the device
* @mask: pad mask
* queue_limits_stack_integrity - stack integrity profile
* @t: target queue limits
* @b: base queue limits
*
* Update dma pad mask.
* Check if the integrity profile in the @b can be stacked into the
* target @t. Stacking is possible if either:
*
* Appending pad buffer to a request modifies the last entry of a
* scatter list such that it includes the pad buffer.
**/
void blk_queue_update_dma_pad(struct request_queue *q, unsigned int mask)
* a) does not have any integrity information stacked into it yet
* b) the integrity profile in @b is identical to the one in @t
*
* If @b can be stacked into @t, return %true. Else return %false and clear the
* integrity information in @t.
*/
bool queue_limits_stack_integrity(struct queue_limits *t,
struct queue_limits *b)
{
if (mask > q->dma_pad_mask)
q->dma_pad_mask = mask;
struct blk_integrity *ti = &t->integrity;
struct blk_integrity *bi = &b->integrity;
if (!IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY))
return true;
if (!ti->tuple_size) {
/* inherit the settings from the first underlying device */
if (!(ti->flags & BLK_INTEGRITY_STACKED)) {
ti->flags = BLK_INTEGRITY_DEVICE_CAPABLE |
(bi->flags & BLK_INTEGRITY_REF_TAG);
ti->csum_type = bi->csum_type;
ti->tuple_size = bi->tuple_size;
ti->pi_offset = bi->pi_offset;
ti->interval_exp = bi->interval_exp;
ti->tag_size = bi->tag_size;
goto done;
}
if (!bi->tuple_size)
goto done;
}
if (ti->tuple_size != bi->tuple_size)
goto incompatible;
if (ti->interval_exp != bi->interval_exp)
goto incompatible;
if (ti->tag_size != bi->tag_size)
goto incompatible;
if (ti->csum_type != bi->csum_type)
goto incompatible;
if ((ti->flags & BLK_INTEGRITY_REF_TAG) !=
(bi->flags & BLK_INTEGRITY_REF_TAG))
goto incompatible;
done:
ti->flags |= BLK_INTEGRITY_STACKED;
return true;
incompatible:
memset(ti, 0, sizeof(*ti));
return false;
}
EXPORT_SYMBOL(blk_queue_update_dma_pad);
EXPORT_SYMBOL_GPL(queue_limits_stack_integrity);
/**
* blk_set_queue_depth - tell the block layer about the device queue depth
@ -810,54 +784,11 @@ void blk_set_queue_depth(struct request_queue *q, unsigned int depth)
}
EXPORT_SYMBOL(blk_set_queue_depth);
/**
* blk_queue_write_cache - configure queue's write cache
* @q: the request queue for the device
* @wc: write back cache on or off
* @fua: device supports FUA writes, if true
*
* Tell the block layer about the write cache of @q.
*/
void blk_queue_write_cache(struct request_queue *q, bool wc, bool fua)
{
if (wc) {
blk_queue_flag_set(QUEUE_FLAG_HW_WC, q);
blk_queue_flag_set(QUEUE_FLAG_WC, q);
} else {
blk_queue_flag_clear(QUEUE_FLAG_HW_WC, q);
blk_queue_flag_clear(QUEUE_FLAG_WC, q);
}
if (fua)
blk_queue_flag_set(QUEUE_FLAG_FUA, q);
else
blk_queue_flag_clear(QUEUE_FLAG_FUA, q);
}
EXPORT_SYMBOL_GPL(blk_queue_write_cache);
/**
* disk_set_zoned - inidicate a zoned device
* @disk: gendisk to configure
*/
void disk_set_zoned(struct gendisk *disk)
{
struct request_queue *q = disk->queue;
WARN_ON_ONCE(!IS_ENABLED(CONFIG_BLK_DEV_ZONED));
/*
* Set the zone write granularity to the device logical block
* size by default. The driver can change this value if needed.
*/
q->limits.zoned = true;
blk_queue_zone_write_granularity(q, queue_logical_block_size(q));
}
EXPORT_SYMBOL_GPL(disk_set_zoned);
int bdev_alignment_offset(struct block_device *bdev)
{
struct request_queue *q = bdev_get_queue(bdev);
if (q->limits.misaligned)
if (q->limits.flags & BLK_FLAG_MISALIGNED)
return -1;
if (bdev_is_partition(bdev))
return queue_limit_alignment_offset(&q->limits,

434
block/blk-sysfs.c
View File

@ -22,8 +22,8 @@
struct queue_sysfs_entry {
struct attribute attr;
ssize_t (*show)(struct request_queue *, char *);
ssize_t (*store)(struct request_queue *, const char *, size_t);
ssize_t (*show)(struct gendisk *disk, char *page);
ssize_t (*store)(struct gendisk *disk, const char *page, size_t count);
};
static ssize_t
@ -47,18 +47,18 @@ queue_var_store(unsigned long *var, const char *page, size_t count)
return count;
}
static ssize_t queue_requests_show(struct request_queue *q, char *page)
static ssize_t queue_requests_show(struct gendisk *disk, char *page)
{
return queue_var_show(q->nr_requests, page);
return queue_var_show(disk->queue->nr_requests, page);
}
static ssize_t
queue_requests_store(struct request_queue *q, const char *page, size_t count)
queue_requests_store(struct gendisk *disk, const char *page, size_t count)
{
unsigned long nr;
int ret, err;
if (!queue_is_mq(q))
if (!queue_is_mq(disk->queue))
return -EINVAL;
ret = queue_var_store(&nr, page, count);
@ -68,111 +68,91 @@ queue_requests_store(struct request_queue *q, const char *page, size_t count)
if (nr < BLKDEV_MIN_RQ)
nr = BLKDEV_MIN_RQ;
err = blk_mq_update_nr_requests(q, nr);
err = blk_mq_update_nr_requests(disk->queue, nr);
if (err)
return err;
return ret;
}
static ssize_t queue_ra_show(struct request_queue *q, char *page)
static ssize_t queue_ra_show(struct gendisk *disk, char *page)
{
unsigned long ra_kb;
if (!q->disk)
return -EINVAL;
ra_kb = q->disk->bdi->ra_pages << (PAGE_SHIFT - 10);
return queue_var_show(ra_kb, page);
return queue_var_show(disk->bdi->ra_pages << (PAGE_SHIFT - 10), page);
}
static ssize_t
queue_ra_store(struct request_queue *q, const char *page, size_t count)
queue_ra_store(struct gendisk *disk, const char *page, size_t count)
{
unsigned long ra_kb;
ssize_t ret;
if (!q->disk)
return -EINVAL;
ret = queue_var_store(&ra_kb, page, count);
if (ret < 0)
return ret;
q->disk->bdi->ra_pages = ra_kb >> (PAGE_SHIFT - 10);
disk->bdi->ra_pages = ra_kb >> (PAGE_SHIFT - 10);
return ret;
}
static ssize_t queue_max_sectors_show(struct request_queue *q, char *page)
{
int max_sectors_kb = queue_max_sectors(q) >> 1;
return queue_var_show(max_sectors_kb, page);
#define QUEUE_SYSFS_LIMIT_SHOW(_field) \
static ssize_t queue_##_field##_show(struct gendisk *disk, char *page) \
{ \
return queue_var_show(disk->queue->limits._field, page); \
}
static ssize_t queue_max_segments_show(struct request_queue *q, char *page)
{
return queue_var_show(queue_max_segments(q), page);
QUEUE_SYSFS_LIMIT_SHOW(max_segments)
QUEUE_SYSFS_LIMIT_SHOW(max_discard_segments)
QUEUE_SYSFS_LIMIT_SHOW(max_integrity_segments)
QUEUE_SYSFS_LIMIT_SHOW(max_segment_size)
QUEUE_SYSFS_LIMIT_SHOW(logical_block_size)
QUEUE_SYSFS_LIMIT_SHOW(physical_block_size)
QUEUE_SYSFS_LIMIT_SHOW(chunk_sectors)
QUEUE_SYSFS_LIMIT_SHOW(io_min)
QUEUE_SYSFS_LIMIT_SHOW(io_opt)
QUEUE_SYSFS_LIMIT_SHOW(discard_granularity)
QUEUE_SYSFS_LIMIT_SHOW(zone_write_granularity)
QUEUE_SYSFS_LIMIT_SHOW(virt_boundary_mask)
QUEUE_SYSFS_LIMIT_SHOW(dma_alignment)
QUEUE_SYSFS_LIMIT_SHOW(max_open_zones)
QUEUE_SYSFS_LIMIT_SHOW(max_active_zones)
QUEUE_SYSFS_LIMIT_SHOW(atomic_write_unit_min)
QUEUE_SYSFS_LIMIT_SHOW(atomic_write_unit_max)
#define QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES(_field) \
static ssize_t queue_##_field##_show(struct gendisk *disk, char *page) \
{ \
return sprintf(page, "%llu\n", \
(unsigned long long)disk->queue->limits._field << \
SECTOR_SHIFT); \
}
static ssize_t queue_max_discard_segments_show(struct request_queue *q,
char *page)
{
return queue_var_show(queue_max_discard_segments(q), page);
QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES(max_discard_sectors)
QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES(max_hw_discard_sectors)
QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES(max_write_zeroes_sectors)
QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES(atomic_write_max_sectors)
QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES(atomic_write_boundary_sectors)
#define QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_KB(_field) \
static ssize_t queue_##_field##_show(struct gendisk *disk, char *page) \
{ \
return queue_var_show(disk->queue->limits._field >> 1, page); \
}
static ssize_t queue_max_integrity_segments_show(struct request_queue *q, char *page)
{
return queue_var_show(q->limits.max_integrity_segments, page);
QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_KB(max_sectors)
QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_KB(max_hw_sectors)
#define QUEUE_SYSFS_SHOW_CONST(_name, _val) \
static ssize_t queue_##_name##_show(struct gendisk *disk, char *page) \
{ \
return sprintf(page, "%d\n", _val); \
}
static ssize_t queue_max_segment_size_show(struct request_queue *q, char *page)
{
return queue_var_show(queue_max_segment_size(q), page);
}
/* deprecated fields */
QUEUE_SYSFS_SHOW_CONST(discard_zeroes_data, 0)
QUEUE_SYSFS_SHOW_CONST(write_same_max, 0)
QUEUE_SYSFS_SHOW_CONST(poll_delay, -1)
static ssize_t queue_logical_block_size_show(struct request_queue *q, char *page)
{
return queue_var_show(queue_logical_block_size(q), page);
}
static ssize_t queue_physical_block_size_show(struct request_queue *q, char *page)
{
return queue_var_show(queue_physical_block_size(q), page);
}
static ssize_t queue_chunk_sectors_show(struct request_queue *q, char *page)
{
return queue_var_show(q->limits.chunk_sectors, page);
}
static ssize_t queue_io_min_show(struct request_queue *q, char *page)
{
return queue_var_show(queue_io_min(q), page);
}
static ssize_t queue_io_opt_show(struct request_queue *q, char *page)
{
return queue_var_show(queue_io_opt(q), page);
}
static ssize_t queue_discard_granularity_show(struct request_queue *q, char *page)
{
return queue_var_show(q->limits.discard_granularity, page);
}
static ssize_t queue_discard_max_hw_show(struct request_queue *q, char *page)
{
return sprintf(page, "%llu\n",
(unsigned long long)q->limits.max_hw_discard_sectors << 9);
}
static ssize_t queue_discard_max_show(struct request_queue *q, char *page)
{
return sprintf(page, "%llu\n",
(unsigned long long)q->limits.max_discard_sectors << 9);
}
static ssize_t queue_discard_max_store(struct request_queue *q,
const char *page, size_t count)
static ssize_t queue_max_discard_sectors_store(struct gendisk *disk,
const char *page, size_t count)
{
unsigned long max_discard_bytes;
struct queue_limits lim;
@ -183,54 +163,34 @@ static ssize_t queue_discard_max_store(struct request_queue *q,
if (ret < 0)
return ret;
if (max_discard_bytes & (q->limits.discard_granularity - 1))
if (max_discard_bytes & (disk->queue->limits.discard_granularity - 1))
return -EINVAL;
if ((max_discard_bytes >> SECTOR_SHIFT) > UINT_MAX)
return -EINVAL;
blk_mq_freeze_queue(q);
lim = queue_limits_start_update(q);
lim = queue_limits_start_update(disk->queue);
lim.max_user_discard_sectors = max_discard_bytes >> SECTOR_SHIFT;
err = queue_limits_commit_update(q, &lim);
blk_mq_unfreeze_queue(q);
err = queue_limits_commit_update(disk->queue, &lim);
if (err)
return err;
return ret;
}
static ssize_t queue_discard_zeroes_data_show(struct request_queue *q, char *page)
{
return queue_var_show(0, page);
}
static ssize_t queue_write_same_max_show(struct request_queue *q, char *page)
{
return queue_var_show(0, page);
}
static ssize_t queue_write_zeroes_max_show(struct request_queue *q, char *page)
/*
* For zone append queue_max_zone_append_sectors does not just return the
* underlying queue limits, but actually contains a calculation. Because of
* that we can't simply use QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES here.
*/
static ssize_t queue_zone_append_max_show(struct gendisk *disk, char *page)
{
return sprintf(page, "%llu\n",
(unsigned long long)q->limits.max_write_zeroes_sectors << 9);
}
static ssize_t queue_zone_write_granularity_show(struct request_queue *q,
char *page)
{
return queue_var_show(queue_zone_write_granularity(q), page);
}
static ssize_t queue_zone_append_max_show(struct request_queue *q, char *page)
{
unsigned long long max_sectors = queue_max_zone_append_sectors(q);
return sprintf(page, "%llu\n", max_sectors << SECTOR_SHIFT);
(u64)queue_max_zone_append_sectors(disk->queue) <<
SECTOR_SHIFT);
}
static ssize_t
queue_max_sectors_store(struct request_queue *q, const char *page, size_t count)
queue_max_sectors_store(struct gendisk *disk, const char *page, size_t count)
{
unsigned long max_sectors_kb;
struct queue_limits lim;
@ -241,94 +201,83 @@ queue_max_sectors_store(struct request_queue *q, const char *page, size_t count)
if (ret < 0)
return ret;
blk_mq_freeze_queue(q);
lim = queue_limits_start_update(q);
lim = queue_limits_start_update(disk->queue);
lim.max_user_sectors = max_sectors_kb << 1;
err = queue_limits_commit_update(q, &lim);
blk_mq_unfreeze_queue(q);
err = queue_limits_commit_update(disk->queue, &lim);
if (err)
return err;
return ret;
}
static ssize_t queue_max_hw_sectors_show(struct request_queue *q, char *page)
static ssize_t queue_feature_store(struct gendisk *disk, const char *page,
size_t count, blk_features_t feature)
{
int max_hw_sectors_kb = queue_max_hw_sectors(q) >> 1;
struct queue_limits lim;
unsigned long val;
ssize_t ret;
return queue_var_show(max_hw_sectors_kb, page);
ret = queue_var_store(&val, page, count);
if (ret < 0)
return ret;
lim = queue_limits_start_update(disk->queue);
if (val)
lim.features |= feature;
else
lim.features &= ~feature;
ret = queue_limits_commit_update(disk->queue, &lim);
if (ret)
return ret;
return count;
}
static ssize_t queue_virt_boundary_mask_show(struct request_queue *q, char *page)
{
return queue_var_show(q->limits.virt_boundary_mask, page);
}
static ssize_t queue_dma_alignment_show(struct request_queue *q, char *page)
{
return queue_var_show(queue_dma_alignment(q), page);
}
#define QUEUE_SYSFS_BIT_FNS(name, flag, neg) \
static ssize_t \
queue_##name##_show(struct request_queue *q, char *page) \
#define QUEUE_SYSFS_FEATURE(_name, _feature) \
static ssize_t queue_##_name##_show(struct gendisk *disk, char *page) \
{ \
int bit; \
bit = test_bit(QUEUE_FLAG_##flag, &q->queue_flags); \
return queue_var_show(neg ? !bit : bit, page); \
return sprintf(page, "%u\n", \
!!(disk->queue->limits.features & _feature)); \
} \
static ssize_t \
queue_##name##_store(struct request_queue *q, const char *page, size_t count) \
static ssize_t queue_##_name##_store(struct gendisk *disk, \
const char *page, size_t count) \
{ \
unsigned long val; \
ssize_t ret; \
ret = queue_var_store(&val, page, count); \
if (ret < 0) \
return ret; \
if (neg) \
val = !val; \
\
if (val) \
blk_queue_flag_set(QUEUE_FLAG_##flag, q); \
else \
blk_queue_flag_clear(QUEUE_FLAG_##flag, q); \
return ret; \
return queue_feature_store(disk, page, count, _feature); \
}
QUEUE_SYSFS_BIT_FNS(nonrot, NONROT, 1);
QUEUE_SYSFS_BIT_FNS(random, ADD_RANDOM, 0);
QUEUE_SYSFS_BIT_FNS(iostats, IO_STAT, 0);
QUEUE_SYSFS_BIT_FNS(stable_writes, STABLE_WRITES, 0);
#undef QUEUE_SYSFS_BIT_FNS
QUEUE_SYSFS_FEATURE(rotational, BLK_FEAT_ROTATIONAL)
QUEUE_SYSFS_FEATURE(add_random, BLK_FEAT_ADD_RANDOM)
QUEUE_SYSFS_FEATURE(iostats, BLK_FEAT_IO_STAT)
QUEUE_SYSFS_FEATURE(stable_writes, BLK_FEAT_STABLE_WRITES);
static ssize_t queue_zoned_show(struct request_queue *q, char *page)
#define QUEUE_SYSFS_FEATURE_SHOW(_name, _feature) \
static ssize_t queue_##_name##_show(struct gendisk *disk, char *page) \
{ \
return sprintf(page, "%u\n", \
!!(disk->queue->limits.features & _feature)); \
}
QUEUE_SYSFS_FEATURE_SHOW(poll, BLK_FEAT_POLL);
QUEUE_SYSFS_FEATURE_SHOW(fua, BLK_FEAT_FUA);
QUEUE_SYSFS_FEATURE_SHOW(dax, BLK_FEAT_DAX);
static ssize_t queue_zoned_show(struct gendisk *disk, char *page)
{
if (blk_queue_is_zoned(q))
if (blk_queue_is_zoned(disk->queue))
return sprintf(page, "host-managed\n");
return sprintf(page, "none\n");
}
static ssize_t queue_nr_zones_show(struct request_queue *q, char *page)
static ssize_t queue_nr_zones_show(struct gendisk *disk, char *page)
{
return queue_var_show(disk_nr_zones(q->disk), page);
return queue_var_show(disk_nr_zones(disk), page);
}
static ssize_t queue_max_open_zones_show(struct request_queue *q, char *page)
static ssize_t queue_nomerges_show(struct gendisk *disk, char *page)
{
return queue_var_show(bdev_max_open_zones(q->disk->part0), page);
return queue_var_show((blk_queue_nomerges(disk->queue) << 1) |
blk_queue_noxmerges(disk->queue), page);
}
static ssize_t queue_max_active_zones_show(struct request_queue *q, char *page)
{
return queue_var_show(bdev_max_active_zones(q->disk->part0), page);
}
static ssize_t queue_nomerges_show(struct request_queue *q, char *page)
{
return queue_var_show((blk_queue_nomerges(q) << 1) |
blk_queue_noxmerges(q), page);
}
static ssize_t queue_nomerges_store(struct request_queue *q, const char *page,
static ssize_t queue_nomerges_store(struct gendisk *disk, const char *page,
size_t count)
{
unsigned long nm;
@ -337,29 +286,30 @@ static ssize_t queue_nomerges_store(struct request_queue *q, const char *page,
if (ret < 0)
return ret;
blk_queue_flag_clear(QUEUE_FLAG_NOMERGES, q);
blk_queue_flag_clear(QUEUE_FLAG_NOXMERGES, q);
blk_queue_flag_clear(QUEUE_FLAG_NOMERGES, disk->queue);
blk_queue_flag_clear(QUEUE_FLAG_NOXMERGES, disk->queue);
if (nm == 2)
blk_queue_flag_set(QUEUE_FLAG_NOMERGES, q);
blk_queue_flag_set(QUEUE_FLAG_NOMERGES, disk->queue);
else if (nm)
blk_queue_flag_set(QUEUE_FLAG_NOXMERGES, q);
blk_queue_flag_set(QUEUE_FLAG_NOXMERGES, disk->queue);
return ret;
}
static ssize_t queue_rq_affinity_show(struct request_queue *q, char *page)
static ssize_t queue_rq_affinity_show(struct gendisk *disk, char *page)
{
bool set = test_bit(QUEUE_FLAG_SAME_COMP, &q->queue_flags);
bool force = test_bit(QUEUE_FLAG_SAME_FORCE, &q->queue_flags);
bool set = test_bit(QUEUE_FLAG_SAME_COMP, &disk->queue->queue_flags);
bool force = test_bit(QUEUE_FLAG_SAME_FORCE, &disk->queue->queue_flags);
return queue_var_show(set << force, page);
}
static ssize_t
queue_rq_affinity_store(struct request_queue *q, const char *page, size_t count)
queue_rq_affinity_store(struct gendisk *disk, const char *page, size_t count)
{
ssize_t ret = -EINVAL;
#ifdef CONFIG_SMP
struct request_queue *q = disk->queue;
unsigned long val;
ret = queue_var_store(&val, page, count);
@ -380,38 +330,28 @@ queue_rq_affinity_store(struct request_queue *q, const char *page, size_t count)
return ret;
}
static ssize_t queue_poll_delay_show(struct request_queue *q, char *page)
{
return sprintf(page, "%d\n", -1);
}
static ssize_t queue_poll_delay_store(struct request_queue *q, const char *page,
static ssize_t queue_poll_delay_store(struct gendisk *disk, const char *page,
size_t count)
{
return count;
}
static ssize_t queue_poll_show(struct request_queue *q, char *page)
{
return queue_var_show(test_bit(QUEUE_FLAG_POLL, &q->queue_flags), page);
}
static ssize_t queue_poll_store(struct request_queue *q, const char *page,
static ssize_t queue_poll_store(struct gendisk *disk, const char *page,
size_t count)
{
if (!test_bit(QUEUE_FLAG_POLL, &q->queue_flags))
if (!(disk->queue->limits.features & BLK_FEAT_POLL))
return -EINVAL;
pr_info_ratelimited("writes to the poll attribute are ignored.\n");
pr_info_ratelimited("please use driver specific parameters instead.\n");
return count;
}
static ssize_t queue_io_timeout_show(struct request_queue *q, char *page)
static ssize_t queue_io_timeout_show(struct gendisk *disk, char *page)
{
return sprintf(page, "%u\n", jiffies_to_msecs(q->rq_timeout));
return sprintf(page, "%u\n", jiffies_to_msecs(disk->queue->rq_timeout));
}
static ssize_t queue_io_timeout_store(struct request_queue *q, const char *page,
static ssize_t queue_io_timeout_store(struct gendisk *disk, const char *page,
size_t count)
{
unsigned int val;
@ -421,46 +361,45 @@ static ssize_t queue_io_timeout_store(struct request_queue *q, const char *page,
if (err || val == 0)
return -EINVAL;
blk_queue_rq_timeout(q, msecs_to_jiffies(val));
blk_queue_rq_timeout(disk->queue, msecs_to_jiffies(val));
return count;
}
static ssize_t queue_wc_show(struct request_queue *q, char *page)
static ssize_t queue_wc_show(struct gendisk *disk, char *page)
{
if (test_bit(QUEUE_FLAG_WC, &q->queue_flags))
if (blk_queue_write_cache(disk->queue))
return sprintf(page, "write back\n");
return sprintf(page, "write through\n");
}
static ssize_t queue_wc_store(struct request_queue *q, const char *page,
static ssize_t queue_wc_store(struct gendisk *disk, const char *page,
size_t count)
{
struct queue_limits lim;
bool disable;
int err;
if (!strncmp(page, "write back", 10)) {
if (!test_bit(QUEUE_FLAG_HW_WC, &q->queue_flags))
return -EINVAL;
blk_queue_flag_set(QUEUE_FLAG_WC, q);
disable = false;
} else if (!strncmp(page, "write through", 13) ||
!strncmp(page, "none", 4)) {
blk_queue_flag_clear(QUEUE_FLAG_WC, q);
!strncmp(page, "none", 4)) {
disable = true;
} else {
return -EINVAL;
}
lim = queue_limits_start_update(disk->queue);
if (disable)
lim.flags |= BLK_FLAG_WRITE_CACHE_DISABLED;
else
lim.flags &= ~BLK_FLAG_WRITE_CACHE_DISABLED;
err = queue_limits_commit_update(disk->queue, &lim);
if (err)
return err;
return count;
}
static ssize_t queue_fua_show(struct request_queue *q, char *page)
{
return sprintf(page, "%u\n", test_bit(QUEUE_FLAG_FUA, &q->queue_flags));
}
static ssize_t queue_dax_show(struct request_queue *q, char *page)
{
return queue_var_show(blk_queue_dax(q), page);
}
#define QUEUE_RO_ENTRY(_prefix, _name) \
static struct queue_sysfs_entry _prefix##_entry = { \
.attr = { .name = _name, .mode = 0444 }, \
@ -491,12 +430,18 @@ QUEUE_RO_ENTRY(queue_io_opt, "optimal_io_size");
QUEUE_RO_ENTRY(queue_max_discard_segments, "max_discard_segments");
QUEUE_RO_ENTRY(queue_discard_granularity, "discard_granularity");
QUEUE_RO_ENTRY(queue_discard_max_hw, "discard_max_hw_bytes");
QUEUE_RW_ENTRY(queue_discard_max, "discard_max_bytes");
QUEUE_RO_ENTRY(queue_max_hw_discard_sectors, "discard_max_hw_bytes");
QUEUE_RW_ENTRY(queue_max_discard_sectors, "discard_max_bytes");
QUEUE_RO_ENTRY(queue_discard_zeroes_data, "discard_zeroes_data");
QUEUE_RO_ENTRY(queue_atomic_write_max_sectors, "atomic_write_max_bytes");
QUEUE_RO_ENTRY(queue_atomic_write_boundary_sectors,
"atomic_write_boundary_bytes");
QUEUE_RO_ENTRY(queue_atomic_write_unit_max, "atomic_write_unit_max_bytes");
QUEUE_RO_ENTRY(queue_atomic_write_unit_min, "atomic_write_unit_min_bytes");
QUEUE_RO_ENTRY(queue_write_same_max, "write_same_max_bytes");
QUEUE_RO_ENTRY(queue_write_zeroes_max, "write_zeroes_max_bytes");
QUEUE_RO_ENTRY(queue_max_write_zeroes_sectors, "write_zeroes_max_bytes");
QUEUE_RO_ENTRY(queue_zone_append_max, "zone_append_max_bytes");
QUEUE_RO_ENTRY(queue_zone_write_granularity, "zone_write_granularity");
@ -522,9 +467,9 @@ static struct queue_sysfs_entry queue_hw_sector_size_entry = {
.show = queue_logical_block_size_show,
};
QUEUE_RW_ENTRY(queue_nonrot, "rotational");
QUEUE_RW_ENTRY(queue_rotational, "rotational");
QUEUE_RW_ENTRY(queue_iostats, "iostats");
QUEUE_RW_ENTRY(queue_random, "add_random");
QUEUE_RW_ENTRY(queue_add_random, "add_random");
QUEUE_RW_ENTRY(queue_stable_writes, "stable_writes");
#ifdef CONFIG_BLK_WBT
@ -541,20 +486,22 @@ static ssize_t queue_var_store64(s64 *var, const char *page)
return 0;
}
static ssize_t queue_wb_lat_show(struct request_queue *q, char *page)
static ssize_t queue_wb_lat_show(struct gendisk *disk, char *page)
{
if (!wbt_rq_qos(q))
if (!wbt_rq_qos(disk->queue))
return -EINVAL;
if (wbt_disabled(q))
if (wbt_disabled(disk->queue))
return sprintf(page, "0\n");
return sprintf(page, "%llu\n", div_u64(wbt_get_min_lat(q), 1000));
return sprintf(page, "%llu\n",
div_u64(wbt_get_min_lat(disk->queue), 1000));
}
static ssize_t queue_wb_lat_store(struct request_queue *q, const char *page,
static ssize_t queue_wb_lat_store(struct gendisk *disk, const char *page,
size_t count)
{
struct request_queue *q = disk->queue;
struct rq_qos *rqos;
ssize_t ret;
s64 val;
@ -567,7 +514,7 @@ static ssize_t queue_wb_lat_store(struct request_queue *q, const char *page,
rqos = wbt_rq_qos(q);
if (!rqos) {
ret = wbt_init(q->disk);
ret = wbt_init(disk);
if (ret)
return ret;
}
@ -585,13 +532,11 @@ static ssize_t queue_wb_lat_store(struct request_queue *q, const char *page,
* ends up either enabling or disabling wbt completely. We can't
* have IO inflight if that happens.
*/
blk_mq_freeze_queue(q);
blk_mq_quiesce_queue(q);
wbt_set_min_lat(q, val);
blk_mq_unquiesce_queue(q);
blk_mq_unfreeze_queue(q);
return count;
}
@ -615,14 +560,18 @@ static struct attribute *queue_attrs[] = {
&queue_io_min_entry.attr,
&queue_io_opt_entry.attr,
&queue_discard_granularity_entry.attr,
&queue_discard_max_entry.attr,
&queue_discard_max_hw_entry.attr,
&queue_max_discard_sectors_entry.attr,
&queue_max_hw_discard_sectors_entry.attr,
&queue_discard_zeroes_data_entry.attr,
&queue_atomic_write_max_sectors_entry.attr,
&queue_atomic_write_boundary_sectors_entry.attr,
&queue_atomic_write_unit_min_entry.attr,
&queue_atomic_write_unit_max_entry.attr,
&queue_write_same_max_entry.attr,
&queue_write_zeroes_max_entry.attr,
&queue_max_write_zeroes_sectors_entry.attr,
&queue_zone_append_max_entry.attr,
&queue_zone_write_granularity_entry.attr,
&queue_nonrot_entry.attr,
&queue_rotational_entry.attr,
&queue_zoned_entry.attr,
&queue_nr_zones_entry.attr,
&queue_max_open_zones_entry.attr,
@ -630,7 +579,7 @@ static struct attribute *queue_attrs[] = {
&queue_nomerges_entry.attr,
&queue_iostats_entry.attr,
&queue_stable_writes_entry.attr,
&queue_random_entry.attr,
&queue_add_random_entry.attr,
&queue_poll_entry.attr,
&queue_wc_entry.attr,
&queue_fua_entry.attr,
@ -699,14 +648,13 @@ queue_attr_show(struct kobject *kobj, struct attribute *attr, char *page)
{
struct queue_sysfs_entry *entry = to_queue(attr);
struct gendisk *disk = container_of(kobj, struct gendisk, queue_kobj);
struct request_queue *q = disk->queue;
ssize_t res;
if (!entry->show)
return -EIO;
mutex_lock(&q->sysfs_lock);
res = entry->show(q, page);
mutex_unlock(&q->sysfs_lock);
mutex_lock(&disk->queue->sysfs_lock);
res = entry->show(disk, page);
mutex_unlock(&disk->queue->sysfs_lock);
return res;
}
@ -722,9 +670,11 @@ queue_attr_store(struct kobject *kobj, struct attribute *attr,
if (!entry->store)
return -EIO;
blk_mq_freeze_queue(q);
mutex_lock(&q->sysfs_lock);
res = entry->store(q, page, length);
res = entry->store(disk, page, length);
mutex_unlock(&q->sysfs_lock);
blk_mq_unfreeze_queue(q);
return res;
}

3
block/blk-throttle.c
View File

@ -704,6 +704,9 @@ static unsigned long tg_within_iops_limit(struct throtl_grp *tg, struct bio *bio
/* Calc approx time to dispatch */
jiffy_wait = jiffy_elapsed_rnd - jiffy_elapsed;
/* make sure at least one io can be dispatched after waiting */
jiffy_wait = max(jiffy_wait, HZ / iops_limit + 1);
return jiffy_wait;
}

22
block/blk-wbt.c
View File

@ -37,7 +37,7 @@
enum wbt_flags {
WBT_TRACKED = 1, /* write, tracked for throttling */
WBT_READ = 2, /* read */
WBT_KSWAPD = 4, /* write, from kswapd */
WBT_SWAP = 4, /* write, from swap_writepage() */
WBT_DISCARD = 8, /* discard */
WBT_NR_BITS = 4, /* number of bits */
@ -45,7 +45,7 @@ enum wbt_flags {
enum {
WBT_RWQ_BG = 0,
WBT_RWQ_KSWAPD,
WBT_RWQ_SWAP,
WBT_RWQ_DISCARD,
WBT_NUM_RWQ,
};
@ -172,8 +172,8 @@ static bool wb_recent_wait(struct rq_wb *rwb)
static inline struct rq_wait *get_rq_wait(struct rq_wb *rwb,
enum wbt_flags wb_acct)
{
if (wb_acct & WBT_KSWAPD)
return &rwb->rq_wait[WBT_RWQ_KSWAPD];
if (wb_acct & WBT_SWAP)
return &rwb->rq_wait[WBT_RWQ_SWAP];
else if (wb_acct & WBT_DISCARD)
return &rwb->rq_wait[WBT_RWQ_DISCARD];
@ -206,8 +206,8 @@ static void wbt_rqw_done(struct rq_wb *rwb, struct rq_wait *rqw,
*/
if (wb_acct & WBT_DISCARD)
limit = rwb->wb_background;
else if (test_bit(QUEUE_FLAG_WC, &rwb->rqos.disk->queue->queue_flags) &&
!wb_recent_wait(rwb))
else if (blk_queue_write_cache(rwb->rqos.disk->queue) &&
!wb_recent_wait(rwb))
limit = 0;
else
limit = rwb->wb_normal;
@ -528,7 +528,7 @@ static bool close_io(struct rq_wb *rwb)
time_before(now, rwb->last_comp + HZ / 10);
}
#define REQ_HIPRIO (REQ_SYNC | REQ_META | REQ_PRIO)
#define REQ_HIPRIO (REQ_SYNC | REQ_META | REQ_PRIO | REQ_SWAP)
static inline unsigned int get_limit(struct rq_wb *rwb, blk_opf_t opf)
{
@ -539,13 +539,13 @@ static inline unsigned int get_limit(struct rq_wb *rwb, blk_opf_t opf)
/*
* At this point we know it's a buffered write. If this is
* kswapd trying to free memory, or REQ_SYNC is set, then
* swap trying to free memory, or REQ_SYNC is set, then
* it's WB_SYNC_ALL writeback, and we'll use the max limit for
* that. If the write is marked as a background write, then use
* the idle limit, or go to normal if we haven't had competing
* IO for a bit.
*/
if ((opf & REQ_HIPRIO) || wb_recent_wait(rwb) || current_is_kswapd())
if ((opf & REQ_HIPRIO) || wb_recent_wait(rwb))
limit = rwb->rq_depth.max_depth;
else if ((opf & REQ_BACKGROUND) || close_io(rwb)) {
/*
@ -622,8 +622,8 @@ static enum wbt_flags bio_to_wbt_flags(struct rq_wb *rwb, struct bio *bio)
if (bio_op(bio) == REQ_OP_READ) {
flags = WBT_READ;
} else if (wbt_should_throttle(bio)) {
if (current_is_kswapd())
flags |= WBT_KSWAPD;
if (bio->bi_opf & REQ_SWAP)
flags |= WBT_SWAP;
if (bio_op(bio) == REQ_OP_DISCARD)
flags |= WBT_DISCARD;
flags |= WBT_TRACKED;

126
block/blk-zoned.c
View File

@ -115,24 +115,6 @@ const char *blk_zone_cond_str(enum blk_zone_cond zone_cond)
}
EXPORT_SYMBOL_GPL(blk_zone_cond_str);
/**
* bdev_nr_zones - Get number of zones
* @bdev: Target device
*
* Return the total number of zones of a zoned block device. For a block
* device without zone capabilities, the number of zones is always 0.
*/
unsigned int bdev_nr_zones(struct block_device *bdev)
{
sector_t zone_sectors = bdev_zone_sectors(bdev);
if (!bdev_is_zoned(bdev))
return 0;
return (bdev_nr_sectors(bdev) + zone_sectors - 1) >>
ilog2(zone_sectors);
}
EXPORT_SYMBOL_GPL(bdev_nr_zones);
/**
* blkdev_report_zones - Get zones information
* @bdev: Target block device
@ -168,77 +150,6 @@ int blkdev_report_zones(struct block_device *bdev, sector_t sector,
}
EXPORT_SYMBOL_GPL(blkdev_report_zones);
static inline unsigned long *blk_alloc_zone_bitmap(int node,
unsigned int nr_zones)
{
return kcalloc_node(BITS_TO_LONGS(nr_zones), sizeof(unsigned long),
GFP_NOIO, node);
}
static int blk_zone_need_reset_cb(struct blk_zone *zone, unsigned int idx,
void *data)
{
/*
* For an all-zones reset, ignore conventional, empty, read-only
* and offline zones.
*/
switch (zone->cond) {
case BLK_ZONE_COND_NOT_WP:
case BLK_ZONE_COND_EMPTY:
case BLK_ZONE_COND_READONLY:
case BLK_ZONE_COND_OFFLINE:
return 0;
default:
set_bit(idx, (unsigned long *)data);
return 0;
}
}
static int blkdev_zone_reset_all_emulated(struct block_device *bdev)
{
struct gendisk *disk = bdev->bd_disk;
sector_t capacity = bdev_nr_sectors(bdev);
sector_t zone_sectors = bdev_zone_sectors(bdev);
unsigned long *need_reset;
struct bio *bio = NULL;
sector_t sector = 0;
int ret;
need_reset = blk_alloc_zone_bitmap(disk->queue->node, disk->nr_zones);
if (!need_reset)
return -ENOMEM;
ret = disk->fops->report_zones(disk, 0, disk->nr_zones,
blk_zone_need_reset_cb, need_reset);
if (ret < 0)
goto out_free_need_reset;
ret = 0;
while (sector < capacity) {
if (!test_bit(disk_zone_no(disk, sector), need_reset)) {
sector += zone_sectors;
continue;
}
bio = blk_next_bio(bio, bdev, 0, REQ_OP_ZONE_RESET | REQ_SYNC,
GFP_KERNEL);
bio->bi_iter.bi_sector = sector;
sector += zone_sectors;
/* This may take a while, so be nice to others */
cond_resched();
}
if (bio) {
ret = submit_bio_wait(bio);
bio_put(bio);
}
out_free_need_reset:
kfree(need_reset);
return ret;
}
static int blkdev_zone_reset_all(struct block_device *bdev)
{
struct bio bio;
@ -265,7 +176,6 @@ static int blkdev_zone_reset_all(struct block_device *bdev)
int blkdev_zone_mgmt(struct block_device *bdev, enum req_op op,
sector_t sector, sector_t nr_sectors)
{
struct request_queue *q = bdev_get_queue(bdev);
sector_t zone_sectors = bdev_zone_sectors(bdev);
sector_t capacity = bdev_nr_sectors(bdev);
sector_t end_sector = sector + nr_sectors;
@ -293,16 +203,11 @@ int blkdev_zone_mgmt(struct block_device *bdev, enum req_op op,
return -EINVAL;
/*
* In the case of a zone reset operation over all zones,
* REQ_OP_ZONE_RESET_ALL can be used with devices supporting this
* command. For other devices, we emulate this command behavior by
* identifying the zones needing a reset.
* In the case of a zone reset operation over all zones, use
* REQ_OP_ZONE_RESET_ALL.
*/
if (op == REQ_OP_ZONE_RESET && sector == 0 && nr_sectors == capacity) {
if (!blk_queue_zone_resetall(q))
return blkdev_zone_reset_all_emulated(bdev);
if (op == REQ_OP_ZONE_RESET && sector == 0 && nr_sectors == capacity)
return blkdev_zone_reset_all(bdev);
}
while (sector < end_sector) {
bio = blk_next_bio(bio, bdev, 0, op | REQ_SYNC, GFP_KERNEL);
@ -1573,7 +1478,7 @@ void disk_free_zone_resources(struct gendisk *disk)
mempool_destroy(disk->zone_wplugs_pool);
disk->zone_wplugs_pool = NULL;
kfree(disk->conv_zones_bitmap);
bitmap_free(disk->conv_zones_bitmap);
disk->conv_zones_bitmap = NULL;
disk->zone_capacity = 0;
disk->last_zone_capacity = 0;
@ -1650,8 +1555,22 @@ static int disk_update_zone_resources(struct gendisk *disk,
return -ENODEV;
}
lim = queue_limits_start_update(q);
/*
* Some devices can advertize zone resource limits that are larger than
* the number of sequential zones of the zoned block device, e.g. a
* small ZNS namespace. For such case, assume that the zoned device has
* no zone resource limits.
*/
nr_seq_zones = disk->nr_zones - nr_conv_zones;
if (lim.max_open_zones >= nr_seq_zones)
lim.max_open_zones = 0;
if (lim.max_active_zones >= nr_seq_zones)
lim.max_active_zones = 0;
if (!disk->zone_wplugs_pool)
return 0;
goto commit;
/*
* If the device has no limit on the maximum number of open and active
@ -1660,9 +1579,6 @@ static int disk_update_zone_resources(struct gendisk *disk,
* dynamic zone write plug allocation when simultaneously writing to
* more zones than the size of the mempool.
*/
lim = queue_limits_start_update(q);
nr_seq_zones = disk->nr_zones - nr_conv_zones;
pool_size = max(lim.max_open_zones, lim.max_active_zones);
if (!pool_size)
pool_size = min(BLK_ZONE_WPLUG_DEFAULT_POOL_SIZE, nr_seq_zones);
@ -1676,6 +1592,7 @@ static int disk_update_zone_resources(struct gendisk *disk,
lim.max_open_zones = 0;
}
commit:
return queue_limits_commit_update(q, &lim);
}
@ -1683,7 +1600,6 @@ static int blk_revalidate_conv_zone(struct blk_zone *zone, unsigned int idx,
struct blk_revalidate_zone_args *args)
{
struct gendisk *disk = args->disk;
struct request_queue *q = disk->queue;
if (zone->capacity != zone->len) {
pr_warn("%s: Invalid conventional zone capacity\n",
@ -1699,7 +1615,7 @@ static int blk_revalidate_conv_zone(struct blk_zone *zone, unsigned int idx,
if (!args->conv_zones_bitmap) {
args->conv_zones_bitmap =
blk_alloc_zone_bitmap(q->node, args->nr_zones);
bitmap_zalloc(args->nr_zones, GFP_NOIO);
if (!args->conv_zones_bitmap)
return -ENOMEM;
}

22
block/blk.h
View File

@ -98,8 +98,8 @@ static inline bool biovec_phys_mergeable(struct request_queue *q,
struct bio_vec *vec1, struct bio_vec *vec2)
{
unsigned long mask = queue_segment_boundary(q);
phys_addr_t addr1 = page_to_phys(vec1->bv_page) + vec1->bv_offset;
phys_addr_t addr2 = page_to_phys(vec2->bv_page) + vec2->bv_offset;
phys_addr_t addr1 = bvec_phys(vec1);
phys_addr_t addr2 = bvec_phys(vec2);
/*
* Merging adjacent physical pages may not work correctly under KMSAN
@ -181,9 +181,11 @@ static inline unsigned int blk_rq_get_max_segments(struct request *rq)
return queue_max_segments(rq->q);
}
static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q,
enum req_op op)
static inline unsigned int blk_queue_get_max_sectors(struct request *rq)
{
struct request_queue *q = rq->q;
enum req_op op = req_op(rq);
if (unlikely(op == REQ_OP_DISCARD || op == REQ_OP_SECURE_ERASE))
return min(q->limits.max_discard_sectors,
UINT_MAX >> SECTOR_SHIFT);
@ -191,6 +193,9 @@ static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q,
if (unlikely(op == REQ_OP_WRITE_ZEROES))
return q->limits.max_write_zeroes_sectors;
if (rq->cmd_flags & REQ_ATOMIC)
return q->limits.atomic_write_max_sectors;
return q->limits.max_sectors;
}
@ -352,6 +357,8 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio);
enum elv_merge blk_try_merge(struct request *rq, struct bio *bio);
int blk_set_default_limits(struct queue_limits *lim);
void blk_apply_bdi_limits(struct backing_dev_info *bdi,
struct queue_limits *lim);
int blk_dev_init(void);
/*
@ -393,7 +400,7 @@ struct bio *__blk_queue_bounce(struct bio *bio, struct request_queue *q);
static inline bool blk_queue_may_bounce(struct request_queue *q)
{
return IS_ENABLED(CONFIG_BOUNCE) &&
q->limits.bounce == BLK_BOUNCE_HIGH &&
(q->limits.features & BLK_FEAT_BOUNCE_HIGH) &&
max_low_pfn >= max_pfn;
}
@ -673,4 +680,9 @@ int bdev_open(struct block_device *bdev, blk_mode_t mode, void *holder,
const struct blk_holder_ops *hops, struct file *bdev_file);
int bdev_permission(dev_t dev, blk_mode_t mode, void *holder);
void blk_integrity_generate(struct bio *bio);
void blk_integrity_verify(struct bio *bio);
void blk_integrity_prepare(struct request *rq);
void blk_integrity_complete(struct request *rq, unsigned int nr_bytes);
#endif /* BLK_INTERNAL_H */

9
block/elevator.c
View File

@ -709,24 +709,25 @@ static int elevator_change(struct request_queue *q, const char *elevator_name)
return ret;
}
ssize_t elv_iosched_store(struct request_queue *q, const char *buf,
ssize_t elv_iosched_store(struct gendisk *disk, const char *buf,
size_t count)
{
char elevator_name[ELV_NAME_MAX];
int ret;
if (!elv_support_iosched(q))
if (!elv_support_iosched(disk->queue))
return count;
strscpy(elevator_name, buf, sizeof(elevator_name));
ret = elevator_change(q, strstrip(elevator_name));
ret = elevator_change(disk->queue, strstrip(elevator_name));
if (!ret)
return count;
return ret;
}
ssize_t elv_iosched_show(struct request_queue *q, char *name)
ssize_t elv_iosched_show(struct gendisk *disk, char *name)
{
struct request_queue *q = disk->queue;
struct elevator_queue *eq = q->elevator;
struct elevator_type *cur = NULL, *e;
int len = 0;

4
block/elevator.h
View File

@ -147,8 +147,8 @@ extern void elv_unregister(struct elevator_type *);
/*
* io scheduler sysfs switching
*/
extern ssize_t elv_iosched_show(struct request_queue *, char *);
extern ssize_t elv_iosched_store(struct request_queue *, const char *, size_t);
ssize_t elv_iosched_show(struct gendisk *disk, char *page);
ssize_t elv_iosched_store(struct gendisk *disk, const char *page, size_t count);
extern bool elv_bio_merge_ok(struct request *, struct bio *);
extern struct elevator_queue *elevator_alloc(struct request_queue *,

25
block/fops.c
View File

@ -34,9 +34,12 @@ static blk_opf_t dio_bio_write_op(struct kiocb *iocb)
return opf;
}
static bool blkdev_dio_unaligned(struct block_device *bdev, loff_t pos,
struct iov_iter *iter)
static bool blkdev_dio_invalid(struct block_device *bdev, loff_t pos,
struct iov_iter *iter, bool is_atomic)
{
if (is_atomic && !generic_atomic_write_valid(iter, pos))
return true;
return pos & (bdev_logical_block_size(bdev) - 1) ||
!bdev_iter_is_aligned(bdev, iter);
}
@ -72,6 +75,8 @@ static ssize_t __blkdev_direct_IO_simple(struct kiocb *iocb,
bio.bi_iter.bi_sector = pos >> SECTOR_SHIFT;
bio.bi_write_hint = file_inode(iocb->ki_filp)->i_write_hint;
bio.bi_ioprio = iocb->ki_ioprio;
if (iocb->ki_flags & IOCB_ATOMIC)
bio.bi_opf |= REQ_ATOMIC;
ret = bio_iov_iter_get_pages(&bio, iter);
if (unlikely(ret))
@ -343,6 +348,9 @@ static ssize_t __blkdev_direct_IO_async(struct kiocb *iocb,
task_io_account_write(bio->bi_iter.bi_size);
}
if (iocb->ki_flags & IOCB_ATOMIC)
bio->bi_opf |= REQ_ATOMIC;
if (iocb->ki_flags & IOCB_NOWAIT)
bio->bi_opf |= REQ_NOWAIT;
@ -359,12 +367,13 @@ static ssize_t __blkdev_direct_IO_async(struct kiocb *iocb,
static ssize_t blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
{
struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host);
bool is_atomic = iocb->ki_flags & IOCB_ATOMIC;
unsigned int nr_pages;
if (!iov_iter_count(iter))
return 0;
if (blkdev_dio_unaligned(bdev, iocb->ki_pos, iter))
if (blkdev_dio_invalid(bdev, iocb->ki_pos, iter, is_atomic))
return -EINVAL;
nr_pages = bio_iov_vecs_to_alloc(iter, BIO_MAX_VECS + 1);
@ -373,6 +382,8 @@ static ssize_t blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
return __blkdev_direct_IO_simple(iocb, iter, bdev,
nr_pages);
return __blkdev_direct_IO_async(iocb, iter, bdev, nr_pages);
} else if (is_atomic) {
return -EINVAL;
}
return __blkdev_direct_IO(iocb, iter, bdev, bio_max_segs(nr_pages));
}
@ -383,10 +394,11 @@ static int blkdev_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
struct block_device *bdev = I_BDEV(inode);
loff_t isize = i_size_read(inode);
iomap->bdev = bdev;
iomap->offset = ALIGN_DOWN(offset, bdev_logical_block_size(bdev));
if (offset >= isize)
return -EIO;
iomap->bdev = bdev;
iomap->offset = ALIGN_DOWN(offset, bdev_logical_block_size(bdev));
iomap->type = IOMAP_MAPPED;
iomap->addr = iomap->offset;
iomap->length = isize - iomap->offset;
@ -612,6 +624,9 @@ static int blkdev_open(struct inode *inode, struct file *filp)
if (!bdev)
return -ENXIO;
if (bdev_can_atomic_write(bdev) && filp->f_flags & O_DIRECT)
filp->f_mode |= FMODE_CAN_ATOMIC_WRITE;
ret = bdev_open(bdev, mode, filp->private_data, NULL, filp);
if (ret)
blkdev_put_no_open(bdev);

2
block/genhd.c
View File

@ -524,7 +524,7 @@ int __must_check device_add_disk(struct device *parent, struct gendisk *disk,
disk->part0->bd_dev = MKDEV(disk->major, disk->first_minor);
}
disk_update_readahead(disk);
blk_apply_bdi_limits(disk->bdi, &disk->queue->limits);
disk_add_events(disk);
set_bit(GD_ADDED, &disk->state);
return 0;

2
block/ioctl.c
View File

@ -224,7 +224,7 @@ static int blk_ioctl_zeroout(struct block_device *bdev, blk_mode_t mode,
goto fail;
err = blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL,
BLKDEV_ZERO_NOUNMAP);
BLKDEV_ZERO_NOUNMAP | BLKDEV_ZERO_KILLABLE);
fail:
filemap_invalidate_unlock(bdev->bd_mapping);

20
block/mq-deadline.c
View File

@ -487,6 +487,20 @@ unlock:
return rq;
}
/*
* 'depth' is a number in the range 1..INT_MAX representing a number of
* requests. Scale it with a factor (1 << bt->sb.shift) / q->nr_requests since
* 1..(1 << bt->sb.shift) is the range expected by sbitmap_get_shallow().
* Values larger than q->nr_requests have the same effect as q->nr_requests.
*/
static int dd_to_word_depth(struct blk_mq_hw_ctx *hctx, unsigned int qdepth)
{
struct sbitmap_queue *bt = &hctx->sched_tags->bitmap_tags;
const unsigned int nrr = hctx->queue->nr_requests;
return ((qdepth << bt->sb.shift) + nrr - 1) / nrr;
}
/*
* Called by __blk_mq_alloc_request(). The shallow_depth value set by this
* function is used by __blk_mq_get_tag().
@ -503,7 +517,7 @@ static void dd_limit_depth(blk_opf_t opf, struct blk_mq_alloc_data *data)
* Throttle asynchronous requests and writes such that these requests
* do not block the allocation of synchronous requests.
*/
data->shallow_depth = dd->async_depth;
data->shallow_depth = dd_to_word_depth(data->hctx, dd->async_depth);
}
/* Called by blk_mq_update_nr_requests(). */
@ -513,9 +527,9 @@ static void dd_depth_updated(struct blk_mq_hw_ctx *hctx)
struct deadline_data *dd = q->elevator->elevator_data;
struct blk_mq_tags *tags = hctx->sched_tags;
dd->async_depth = max(1UL, 3 * q->nr_requests / 4);
dd->async_depth = q->nr_requests;
sbitmap_queue_min_shallow_depth(&tags->bitmap_tags, dd->async_depth);
sbitmap_queue_min_shallow_depth(&tags->bitmap_tags, 1);
}
/* Called by blk_mq_init_hctx() and blk_mq_init_sched(). */

298
block/t10-pi.c
View File

@ -11,17 +11,23 @@
#include <linux/module.h>
#include <net/checksum.h>
#include <asm/unaligned.h>
#include "blk.h"
typedef __be16 (csum_fn) (__be16, void *, unsigned int);
struct blk_integrity_iter {
void *prot_buf;
void *data_buf;
sector_t seed;
unsigned int data_size;
unsigned short interval;
const char *disk_name;
};
static __be16 t10_pi_crc_fn(__be16 crc, void *data, unsigned int len)
static __be16 t10_pi_csum(__be16 csum, void *data, unsigned int len,
unsigned char csum_type)
{
return cpu_to_be16(crc_t10dif_update(be16_to_cpu(crc), data, len));
}
static __be16 t10_pi_ip_fn(__be16 csum, void *data, unsigned int len)
{
return (__force __be16)ip_compute_csum(data, len);
if (csum_type == BLK_INTEGRITY_CSUM_IP)
return (__force __be16)ip_compute_csum(data, len);
return cpu_to_be16(crc_t10dif_update(be16_to_cpu(csum), data, len));
}
/*
@ -29,48 +35,44 @@ static __be16 t10_pi_ip_fn(__be16 csum, void *data, unsigned int len)
* 16 bit app tag, 32 bit reference tag. Type 3 does not define the ref
* tag.
*/
static blk_status_t t10_pi_generate(struct blk_integrity_iter *iter,
csum_fn *fn, enum t10_dif_type type)
static void t10_pi_generate(struct blk_integrity_iter *iter,
struct blk_integrity *bi)
{
u8 offset = iter->pi_offset;
u8 offset = bi->pi_offset;
unsigned int i;
for (i = 0 ; i < iter->data_size ; i += iter->interval) {
struct t10_pi_tuple *pi = iter->prot_buf + offset;
pi->guard_tag = fn(0, iter->data_buf, iter->interval);
pi->guard_tag = t10_pi_csum(0, iter->data_buf, iter->interval,
bi->csum_type);
if (offset)
pi->guard_tag = fn(pi->guard_tag, iter->prot_buf,
offset);
pi->guard_tag = t10_pi_csum(pi->guard_tag,
iter->prot_buf, offset, bi->csum_type);
pi->app_tag = 0;
if (type == T10_PI_TYPE1_PROTECTION)
if (bi->flags & BLK_INTEGRITY_REF_TAG)
pi->ref_tag = cpu_to_be32(lower_32_bits(iter->seed));
else
pi->ref_tag = 0;
iter->data_buf += iter->interval;
iter->prot_buf += iter->tuple_size;
iter->prot_buf += bi->tuple_size;
iter->seed++;
}
return BLK_STS_OK;
}
static blk_status_t t10_pi_verify(struct blk_integrity_iter *iter,
csum_fn *fn, enum t10_dif_type type)
struct blk_integrity *bi)
{
u8 offset = iter->pi_offset;
u8 offset = bi->pi_offset;
unsigned int i;
BUG_ON(type == T10_PI_TYPE0_PROTECTION);
for (i = 0 ; i < iter->data_size ; i += iter->interval) {
struct t10_pi_tuple *pi = iter->prot_buf + offset;
__be16 csum;
if (type == T10_PI_TYPE1_PROTECTION ||
type == T10_PI_TYPE2_PROTECTION) {
if (bi->flags & BLK_INTEGRITY_REF_TAG) {
if (pi->app_tag == T10_PI_APP_ESCAPE)
goto next;
@ -82,15 +84,17 @@ static blk_status_t t10_pi_verify(struct blk_integrity_iter *iter,
iter->seed, be32_to_cpu(pi->ref_tag));
return BLK_STS_PROTECTION;
}
} else if (type == T10_PI_TYPE3_PROTECTION) {
} else {
if (pi->app_tag == T10_PI_APP_ESCAPE &&
pi->ref_tag == T10_PI_REF_ESCAPE)
goto next;
}
csum = fn(0, iter->data_buf, iter->interval);
csum = t10_pi_csum(0, iter->data_buf, iter->interval,
bi->csum_type);
if (offset)
csum = fn(csum, iter->prot_buf, offset);
csum = t10_pi_csum(csum, iter->prot_buf, offset,
bi->csum_type);
if (pi->guard_tag != csum) {
pr_err("%s: guard tag error at sector %llu " \
@ -102,33 +106,13 @@ static blk_status_t t10_pi_verify(struct blk_integrity_iter *iter,
next:
iter->data_buf += iter->interval;
iter->prot_buf += iter->tuple_size;
iter->prot_buf += bi->tuple_size;
iter->seed++;
}
return BLK_STS_OK;
}
static blk_status_t t10_pi_type1_generate_crc(struct blk_integrity_iter *iter)
{
return t10_pi_generate(iter, t10_pi_crc_fn, T10_PI_TYPE1_PROTECTION);
}
static blk_status_t t10_pi_type1_generate_ip(struct blk_integrity_iter *iter)
{
return t10_pi_generate(iter, t10_pi_ip_fn, T10_PI_TYPE1_PROTECTION);
}
static blk_status_t t10_pi_type1_verify_crc(struct blk_integrity_iter *iter)
{
return t10_pi_verify(iter, t10_pi_crc_fn, T10_PI_TYPE1_PROTECTION);
}
static blk_status_t t10_pi_type1_verify_ip(struct blk_integrity_iter *iter)
{
return t10_pi_verify(iter, t10_pi_ip_fn, T10_PI_TYPE1_PROTECTION);
}
/**
* t10_pi_type1_prepare - prepare PI prior submitting request to device
* @rq: request with PI that should be prepared
@ -141,7 +125,7 @@ static blk_status_t t10_pi_type1_verify_ip(struct blk_integrity_iter *iter)
*/
static void t10_pi_type1_prepare(struct request *rq)
{
struct blk_integrity *bi = &rq->q->integrity;
struct blk_integrity *bi = &rq->q->limits.integrity;
const int tuple_sz = bi->tuple_size;
u32 ref_tag = t10_pi_ref_tag(rq);
u8 offset = bi->pi_offset;
@ -192,7 +176,7 @@ static void t10_pi_type1_prepare(struct request *rq)
*/
static void t10_pi_type1_complete(struct request *rq, unsigned int nr_bytes)
{
struct blk_integrity *bi = &rq->q->integrity;
struct blk_integrity *bi = &rq->q->limits.integrity;
unsigned intervals = nr_bytes >> bi->interval_exp;
const int tuple_sz = bi->tuple_size;
u32 ref_tag = t10_pi_ref_tag(rq);
@ -225,81 +209,15 @@ static void t10_pi_type1_complete(struct request *rq, unsigned int nr_bytes)
}
}
static blk_status_t t10_pi_type3_generate_crc(struct blk_integrity_iter *iter)
{
return t10_pi_generate(iter, t10_pi_crc_fn, T10_PI_TYPE3_PROTECTION);
}
static blk_status_t t10_pi_type3_generate_ip(struct blk_integrity_iter *iter)
{
return t10_pi_generate(iter, t10_pi_ip_fn, T10_PI_TYPE3_PROTECTION);
}
static blk_status_t t10_pi_type3_verify_crc(struct blk_integrity_iter *iter)
{
return t10_pi_verify(iter, t10_pi_crc_fn, T10_PI_TYPE3_PROTECTION);
}
static blk_status_t t10_pi_type3_verify_ip(struct blk_integrity_iter *iter)
{
return t10_pi_verify(iter, t10_pi_ip_fn, T10_PI_TYPE3_PROTECTION);
}
/* Type 3 does not have a reference tag so no remapping is required. */
static void t10_pi_type3_prepare(struct request *rq)
{
}
/* Type 3 does not have a reference tag so no remapping is required. */
static void t10_pi_type3_complete(struct request *rq, unsigned int nr_bytes)
{
}
const struct blk_integrity_profile t10_pi_type1_crc = {
.name = "T10-DIF-TYPE1-CRC",
.generate_fn = t10_pi_type1_generate_crc,
.verify_fn = t10_pi_type1_verify_crc,
.prepare_fn = t10_pi_type1_prepare,
.complete_fn = t10_pi_type1_complete,
};
EXPORT_SYMBOL(t10_pi_type1_crc);
const struct blk_integrity_profile t10_pi_type1_ip = {
.name = "T10-DIF-TYPE1-IP",
.generate_fn = t10_pi_type1_generate_ip,
.verify_fn = t10_pi_type1_verify_ip,
.prepare_fn = t10_pi_type1_prepare,
.complete_fn = t10_pi_type1_complete,
};
EXPORT_SYMBOL(t10_pi_type1_ip);
const struct blk_integrity_profile t10_pi_type3_crc = {
.name = "T10-DIF-TYPE3-CRC",
.generate_fn = t10_pi_type3_generate_crc,
.verify_fn = t10_pi_type3_verify_crc,
.prepare_fn = t10_pi_type3_prepare,
.complete_fn = t10_pi_type3_complete,
};
EXPORT_SYMBOL(t10_pi_type3_crc);
const struct blk_integrity_profile t10_pi_type3_ip = {
.name = "T10-DIF-TYPE3-IP",
.generate_fn = t10_pi_type3_generate_ip,
.verify_fn = t10_pi_type3_verify_ip,
.prepare_fn = t10_pi_type3_prepare,
.complete_fn = t10_pi_type3_complete,
};
EXPORT_SYMBOL(t10_pi_type3_ip);
static __be64 ext_pi_crc64(u64 crc, void *data, unsigned int len)
{
return cpu_to_be64(crc64_rocksoft_update(crc, data, len));
}
static blk_status_t ext_pi_crc64_generate(struct blk_integrity_iter *iter,
enum t10_dif_type type)
static void ext_pi_crc64_generate(struct blk_integrity_iter *iter,
struct blk_integrity *bi)
{
u8 offset = iter->pi_offset;
u8 offset = bi->pi_offset;
unsigned int i;
for (i = 0 ; i < iter->data_size ; i += iter->interval) {
@ -311,17 +229,15 @@ static blk_status_t ext_pi_crc64_generate(struct blk_integrity_iter *iter,
iter->prot_buf, offset);
pi->app_tag = 0;
if (type == T10_PI_TYPE1_PROTECTION)
if (bi->flags & BLK_INTEGRITY_REF_TAG)
put_unaligned_be48(iter->seed, pi->ref_tag);
else
put_unaligned_be48(0ULL, pi->ref_tag);
iter->data_buf += iter->interval;
iter->prot_buf += iter->tuple_size;
iter->prot_buf += bi->tuple_size;
iter->seed++;
}
return BLK_STS_OK;
}
static bool ext_pi_ref_escape(u8 *ref_tag)
@ -332,9 +248,9 @@ static bool ext_pi_ref_escape(u8 *ref_tag)
}
static blk_status_t ext_pi_crc64_verify(struct blk_integrity_iter *iter,
enum t10_dif_type type)
struct blk_integrity *bi)
{
u8 offset = iter->pi_offset;
u8 offset = bi->pi_offset;
unsigned int i;
for (i = 0; i < iter->data_size; i += iter->interval) {
@ -342,7 +258,7 @@ static blk_status_t ext_pi_crc64_verify(struct blk_integrity_iter *iter,
u64 ref, seed;
__be64 csum;
if (type == T10_PI_TYPE1_PROTECTION) {
if (bi->flags & BLK_INTEGRITY_REF_TAG) {
if (pi->app_tag == T10_PI_APP_ESCAPE)
goto next;
@ -353,7 +269,7 @@ static blk_status_t ext_pi_crc64_verify(struct blk_integrity_iter *iter,
iter->disk_name, seed, ref);
return BLK_STS_PROTECTION;
}
} else if (type == T10_PI_TYPE3_PROTECTION) {
} else {
if (pi->app_tag == T10_PI_APP_ESCAPE &&
ext_pi_ref_escape(pi->ref_tag))
goto next;
@ -374,26 +290,16 @@ static blk_status_t ext_pi_crc64_verify(struct blk_integrity_iter *iter,
next:
iter->data_buf += iter->interval;
iter->prot_buf += iter->tuple_size;
iter->prot_buf += bi->tuple_size;
iter->seed++;
}
return BLK_STS_OK;
}
static blk_status_t ext_pi_type1_verify_crc64(struct blk_integrity_iter *iter)
{
return ext_pi_crc64_verify(iter, T10_PI_TYPE1_PROTECTION);
}
static blk_status_t ext_pi_type1_generate_crc64(struct blk_integrity_iter *iter)
{
return ext_pi_crc64_generate(iter, T10_PI_TYPE1_PROTECTION);
}
static void ext_pi_type1_prepare(struct request *rq)
{
struct blk_integrity *bi = &rq->q->integrity;
struct blk_integrity *bi = &rq->q->limits.integrity;
const int tuple_sz = bi->tuple_size;
u64 ref_tag = ext_pi_ref_tag(rq);
u8 offset = bi->pi_offset;
@ -433,7 +339,7 @@ static void ext_pi_type1_prepare(struct request *rq)
static void ext_pi_type1_complete(struct request *rq, unsigned int nr_bytes)
{
struct blk_integrity *bi = &rq->q->integrity;
struct blk_integrity *bi = &rq->q->limits.integrity;
unsigned intervals = nr_bytes >> bi->interval_exp;
const int tuple_sz = bi->tuple_size;
u64 ref_tag = ext_pi_ref_tag(rq);
@ -467,33 +373,105 @@ static void ext_pi_type1_complete(struct request *rq, unsigned int nr_bytes)
}
}
static blk_status_t ext_pi_type3_verify_crc64(struct blk_integrity_iter *iter)
void blk_integrity_generate(struct bio *bio)
{
return ext_pi_crc64_verify(iter, T10_PI_TYPE3_PROTECTION);
struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk);
struct bio_integrity_payload *bip = bio_integrity(bio);
struct blk_integrity_iter iter;
struct bvec_iter bviter;
struct bio_vec bv;
iter.disk_name = bio->bi_bdev->bd_disk->disk_name;
iter.interval = 1 << bi->interval_exp;
iter.seed = bio->bi_iter.bi_sector;
iter.prot_buf = bvec_virt(bip->bip_vec);
bio_for_each_segment(bv, bio, bviter) {
void *kaddr = bvec_kmap_local(&bv);
iter.data_buf = kaddr;
iter.data_size = bv.bv_len;
switch (bi->csum_type) {
case BLK_INTEGRITY_CSUM_CRC64:
ext_pi_crc64_generate(&iter, bi);
break;
case BLK_INTEGRITY_CSUM_CRC:
case BLK_INTEGRITY_CSUM_IP:
t10_pi_generate(&iter, bi);
break;
default:
break;
}
kunmap_local(kaddr);
}
}
static blk_status_t ext_pi_type3_generate_crc64(struct blk_integrity_iter *iter)
void blk_integrity_verify(struct bio *bio)
{
return ext_pi_crc64_generate(iter, T10_PI_TYPE3_PROTECTION);
struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk);
struct bio_integrity_payload *bip = bio_integrity(bio);
struct blk_integrity_iter iter;
struct bvec_iter bviter;
struct bio_vec bv;
/*
* At the moment verify is called bi_iter has been advanced during split
* and completion, so use the copy created during submission here.
*/
iter.disk_name = bio->bi_bdev->bd_disk->disk_name;
iter.interval = 1 << bi->interval_exp;
iter.seed = bip->bio_iter.bi_sector;
iter.prot_buf = bvec_virt(bip->bip_vec);
__bio_for_each_segment(bv, bio, bviter, bip->bio_iter) {
void *kaddr = bvec_kmap_local(&bv);
blk_status_t ret = BLK_STS_OK;
iter.data_buf = kaddr;
iter.data_size = bv.bv_len;
switch (bi->csum_type) {
case BLK_INTEGRITY_CSUM_CRC64:
ret = ext_pi_crc64_verify(&iter, bi);
break;
case BLK_INTEGRITY_CSUM_CRC:
case BLK_INTEGRITY_CSUM_IP:
ret = t10_pi_verify(&iter, bi);
break;
default:
break;
}
kunmap_local(kaddr);
if (ret) {
bio->bi_status = ret;
return;
}
}
}
const struct blk_integrity_profile ext_pi_type1_crc64 = {
.name = "EXT-DIF-TYPE1-CRC64",
.generate_fn = ext_pi_type1_generate_crc64,
.verify_fn = ext_pi_type1_verify_crc64,
.prepare_fn = ext_pi_type1_prepare,
.complete_fn = ext_pi_type1_complete,
};
EXPORT_SYMBOL_GPL(ext_pi_type1_crc64);
void blk_integrity_prepare(struct request *rq)
{
struct blk_integrity *bi = &rq->q->limits.integrity;
const struct blk_integrity_profile ext_pi_type3_crc64 = {
.name = "EXT-DIF-TYPE3-CRC64",
.generate_fn = ext_pi_type3_generate_crc64,
.verify_fn = ext_pi_type3_verify_crc64,
.prepare_fn = t10_pi_type3_prepare,
.complete_fn = t10_pi_type3_complete,
};
EXPORT_SYMBOL_GPL(ext_pi_type3_crc64);
if (!(bi->flags & BLK_INTEGRITY_REF_TAG))
return;
if (bi->csum_type == BLK_INTEGRITY_CSUM_CRC64)
ext_pi_type1_prepare(rq);
else
t10_pi_type1_prepare(rq);
}
void blk_integrity_complete(struct request *rq, unsigned int nr_bytes)
{
struct blk_integrity *bi = &rq->q->limits.integrity;
if (!(bi->flags & BLK_INTEGRITY_REF_TAG))
return;
if (bi->csum_type == BLK_INTEGRITY_CSUM_CRC64)
ext_pi_type1_complete(rq, nr_bytes);
else
t10_pi_type1_complete(rq, nr_bytes);
}
MODULE_DESCRIPTION("T10 Protection Information module");
MODULE_LICENSE("GPL");

3
drivers/ata/libata-scsi.c
View File

@ -1024,7 +1024,6 @@ EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain);
int ata_scsi_dev_config(struct scsi_device *sdev, struct queue_limits *lim,
struct ata_device *dev)
{
struct request_queue *q = sdev->request_queue;
int depth = 1;
if (!ata_id_has_unload(dev->id))
@ -1038,7 +1037,7 @@ int ata_scsi_dev_config(struct scsi_device *sdev, struct queue_limits *lim,
sdev->sector_size = ATA_SECT_SIZE;
/* set DMA padding */
blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
lim->dma_pad_mask = ATA_DMA_PAD_SZ - 1;
/* make room for appending the drain */
lim->max_segments--;

4
drivers/ata/pata_macio.c
View File

@ -816,7 +816,7 @@ static int pata_macio_device_configure(struct scsi_device *sdev,
/* OHare has issues with non cache aligned DMA on some chipsets */
if (priv->kind == controller_ohare) {
lim->dma_alignment = 31;
blk_queue_update_dma_pad(sdev->request_queue, 31);
lim->dma_pad_mask = 31;
/* Tell the world about it */
ata_dev_info(dev, "OHare alignment limits applied\n");
@ -831,7 +831,7 @@ static int pata_macio_device_configure(struct scsi_device *sdev,
if (priv->kind == controller_sh_ata6 || priv->kind == controller_k2_ata6) {
/* Allright these are bad, apply restrictions */
lim->dma_alignment = 15;
blk_queue_update_dma_pad(sdev->request_queue, 15);
lim->dma_pad_mask = 15;
/* We enable MWI and hack cache line size directly here, this
* is specific to this chipset and not normal values, we happen

9
drivers/block/Kconfig
View File

@ -354,6 +354,15 @@ config VIRTIO_BLK
This is the virtual block driver for virtio. It can be used with
QEMU based VMMs (like KVM or Xen). Say Y or M.
config BLK_DEV_RUST_NULL
tristate "Rust null block driver (Experimental)"
depends on RUST
help
This is the Rust implementation of the null block driver. For now it
is only a minimal stub.
If unsure, say N.
config BLK_DEV_RBD
tristate "Rados block device (RBD)"
depends on INET && BLOCK

3
drivers/block/Makefile
View File

@ -9,6 +9,9 @@
# needed for trace events
ccflags-y += -I$(src)
obj-$(CONFIG_BLK_DEV_RUST_NULL) += rnull_mod.o
rnull_mod-y := rnull.o
obj-$(CONFIG_MAC_FLOPPY) += swim3.o
obj-$(CONFIG_BLK_DEV_SWIM) += swim_mod.o
obj-$(CONFIG_BLK_DEV_FD) += floppy.o

6
drivers/block/amiflop.c
View File

@ -232,6 +232,7 @@ static DEFINE_MUTEX(amiflop_mutex);
static unsigned long int fd_def_df0 = FD_DD_3; /* default for df0 if it doesn't identify */
module_param(fd_def_df0, ulong, 0);
MODULE_DESCRIPTION("Amiga floppy driver");
MODULE_LICENSE("GPL");
/*
@ -1776,10 +1777,13 @@ static const struct blk_mq_ops amiflop_mq_ops = {
static int fd_alloc_disk(int drive, int system)
{
struct queue_limits lim = {
.features = BLK_FEAT_ROTATIONAL,
};
struct gendisk *disk;
int err;
disk = blk_mq_alloc_disk(&unit[drive].tag_set, NULL, NULL);
disk = blk_mq_alloc_disk(&unit[drive].tag_set, &lim, NULL);
if (IS_ERR(disk))
return PTR_ERR(disk);

1
drivers/block/aoe/aoeblk.c
View File

@ -337,6 +337,7 @@ aoeblk_gdalloc(void *vp)
struct queue_limits lim = {
.max_hw_sectors = aoe_maxsectors,
.io_opt = SZ_2M,
.features = BLK_FEAT_ROTATIONAL,
};
ulong flags;
int late = 0;

6
drivers/block/ataflop.c
View File

@ -1992,9 +1992,12 @@ static const struct blk_mq_ops ataflop_mq_ops = {
static int ataflop_alloc_disk(unsigned int drive, unsigned int type)
{
struct queue_limits lim = {
.features = BLK_FEAT_ROTATIONAL,
};
struct gendisk *disk;
disk = blk_mq_alloc_disk(&unit[drive].tag_set, NULL, NULL);
disk = blk_mq_alloc_disk(&unit[drive].tag_set, &lim, NULL);
if (IS_ERR(disk))
return PTR_ERR(disk);
@ -2197,4 +2200,5 @@ static void __exit atari_floppy_exit(void)
module_init(atari_floppy_init)
module_exit(atari_floppy_exit)
MODULE_DESCRIPTION("Atari floppy driver");
MODULE_LICENSE("GPL");

7
drivers/block/brd.c
View File

@ -296,6 +296,7 @@ static int max_part = 1;
module_param(max_part, int, 0444);
MODULE_PARM_DESC(max_part, "Num Minors to reserve between devices");
MODULE_DESCRIPTION("Ram backed block device driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS_BLOCKDEV_MAJOR(RAMDISK_MAJOR);
MODULE_ALIAS("rd");
@ -335,6 +336,8 @@ static int brd_alloc(int i)
.max_hw_discard_sectors = UINT_MAX,
.max_discard_segments = 1,
.discard_granularity = PAGE_SIZE,
.features = BLK_FEAT_SYNCHRONOUS |
BLK_FEAT_NOWAIT,
};
list_for_each_entry(brd, &brd_devices, brd_list)
@ -366,10 +369,6 @@ static int brd_alloc(int i)
strscpy(disk->disk_name, buf, DISK_NAME_LEN);
set_capacity(disk, rd_size * 2);
/* Tell the block layer that this is not a rotational device */
blk_queue_flag_set(QUEUE_FLAG_NONROT, disk->queue);
blk_queue_flag_set(QUEUE_FLAG_SYNCHRONOUS, disk->queue);
blk_queue_flag_set(QUEUE_FLAG_NOWAIT, disk->queue);
err = add_disk(disk);
if (err)
goto out_cleanup_disk;

6
drivers/block/drbd/drbd_main.c
View File

@ -2697,6 +2697,9 @@ enum drbd_ret_code drbd_create_device(struct drbd_config_context *adm_ctx, unsig
* connect.
*/
.max_hw_sectors = DRBD_MAX_BIO_SIZE_SAFE >> 8,
.features = BLK_FEAT_WRITE_CACHE | BLK_FEAT_FUA |
BLK_FEAT_ROTATIONAL |
BLK_FEAT_STABLE_WRITES,
};
device = minor_to_device(minor);
@ -2735,9 +2738,6 @@ enum drbd_ret_code drbd_create_device(struct drbd_config_context *adm_ctx, unsig
sprintf(disk->disk_name, "drbd%d", minor);
disk->private_data = device;
blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, disk->queue);
blk_queue_write_cache(disk->queue, true, true);
device->md_io.page = alloc_page(GFP_KERNEL);
if (!device->md_io.page)
goto out_no_io_page;

4
drivers/block/floppy.c
View File

@ -4516,7 +4516,8 @@ static bool floppy_available(int drive)
static int floppy_alloc_disk(unsigned int drive, unsigned int type)
{
struct queue_limits lim = {
.max_hw_sectors = 64,
.max_hw_sectors = 64,
.features = BLK_FEAT_ROTATIONAL,
};
struct gendisk *disk;
@ -5016,6 +5017,7 @@ module_param(floppy, charp, 0);
module_param(FLOPPY_IRQ, int, 0);
module_param(FLOPPY_DMA, int, 0);
MODULE_AUTHOR("Alain L. Knaff");
MODULE_DESCRIPTION("Normal floppy disk support");
MODULE_LICENSE("GPL");
/* This doesn't actually get used other than for module information */

184
drivers/block/loop.c
View File

@ -211,13 +211,10 @@ static void __loop_update_dio(struct loop_device *lo, bool dio)
if (lo->lo_state == Lo_bound)
blk_mq_freeze_queue(lo->lo_queue);
lo->use_dio = use_dio;
if (use_dio) {
blk_queue_flag_clear(QUEUE_FLAG_NOMERGES, lo->lo_queue);
if (use_dio)
lo->lo_flags |= LO_FLAGS_DIRECT_IO;
} else {
blk_queue_flag_set(QUEUE_FLAG_NOMERGES, lo->lo_queue);
else
lo->lo_flags &= ~LO_FLAGS_DIRECT_IO;
}
if (lo->lo_state == Lo_bound)
blk_mq_unfreeze_queue(lo->lo_queue);
}
@ -939,24 +936,6 @@ static void loop_free_idle_workers_timer(struct timer_list *timer)
return loop_free_idle_workers(lo, false);
}
static void loop_update_rotational(struct loop_device *lo)
{
struct file *file = lo->lo_backing_file;
struct inode *file_inode = file->f_mapping->host;
struct block_device *file_bdev = file_inode->i_sb->s_bdev;
struct request_queue *q = lo->lo_queue;
bool nonrot = true;
/* not all filesystems (e.g. tmpfs) have a sb->s_bdev */
if (file_bdev)
nonrot = bdev_nonrot(file_bdev);
if (nonrot)
blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
else
blk_queue_flag_clear(QUEUE_FLAG_NONROT, q);
}
/**
* loop_set_status_from_info - configure device from loop_info
* @lo: struct loop_device to configure
@ -998,17 +977,40 @@ loop_set_status_from_info(struct loop_device *lo,
return 0;
}
static int loop_reconfigure_limits(struct loop_device *lo, unsigned short bsize,
bool update_discard_settings)
static unsigned short loop_default_blocksize(struct loop_device *lo,
struct block_device *backing_bdev)
{
/* In case of direct I/O, match underlying block size */
if ((lo->lo_backing_file->f_flags & O_DIRECT) && backing_bdev)
return bdev_logical_block_size(backing_bdev);
return SECTOR_SIZE;
}
static int loop_reconfigure_limits(struct loop_device *lo, unsigned short bsize)
{
struct file *file = lo->lo_backing_file;
struct inode *inode = file->f_mapping->host;
struct block_device *backing_bdev = NULL;
struct queue_limits lim;
if (S_ISBLK(inode->i_mode))
backing_bdev = I_BDEV(inode);
else if (inode->i_sb->s_bdev)
backing_bdev = inode->i_sb->s_bdev;
if (!bsize)
bsize = loop_default_blocksize(lo, backing_bdev);
lim = queue_limits_start_update(lo->lo_queue);
lim.logical_block_size = bsize;
lim.physical_block_size = bsize;
lim.io_min = bsize;
if (update_discard_settings)
loop_config_discard(lo, &lim);
lim.features &= ~(BLK_FEAT_WRITE_CACHE | BLK_FEAT_ROTATIONAL);
if (file->f_op->fsync && !(lo->lo_flags & LO_FLAGS_READ_ONLY))
lim.features |= BLK_FEAT_WRITE_CACHE;
if (backing_bdev && !bdev_nonrot(backing_bdev))
lim.features |= BLK_FEAT_ROTATIONAL;
loop_config_discard(lo, &lim);
return queue_limits_commit_update(lo->lo_queue, &lim);
}
@ -1017,12 +1019,10 @@ static int loop_configure(struct loop_device *lo, blk_mode_t mode,
const struct loop_config *config)
{
struct file *file = fget(config->fd);
struct inode *inode;
struct address_space *mapping;
int error;
loff_t size;
bool partscan;
unsigned short bsize;
bool is_loop;
if (!file)
@ -1055,19 +1055,12 @@ static int loop_configure(struct loop_device *lo, blk_mode_t mode,
goto out_unlock;
mapping = file->f_mapping;
inode = mapping->host;
if ((config->info.lo_flags & ~LOOP_CONFIGURE_SETTABLE_FLAGS) != 0) {
error = -EINVAL;
goto out_unlock;
}
if (config->block_size) {
error = blk_validate_block_size(config->block_size);
if (error)
goto out_unlock;
}
error = loop_set_status_from_info(lo, &config->info);
if (error)
goto out_unlock;
@ -1098,22 +1091,10 @@ static int loop_configure(struct loop_device *lo, blk_mode_t mode,
lo->old_gfp_mask = mapping_gfp_mask(mapping);
mapping_set_gfp_mask(mapping, lo->old_gfp_mask & ~(__GFP_IO|__GFP_FS));
if (!(lo->lo_flags & LO_FLAGS_READ_ONLY) && file->f_op->fsync)
blk_queue_write_cache(lo->lo_queue, true, false);
if (config->block_size)
bsize = config->block_size;
else if ((lo->lo_backing_file->f_flags & O_DIRECT) && inode->i_sb->s_bdev)
/* In case of direct I/O, match underlying block size */
bsize = bdev_logical_block_size(inode->i_sb->s_bdev);
else
bsize = 512;
error = loop_reconfigure_limits(lo, bsize, true);
if (WARN_ON_ONCE(error))
error = loop_reconfigure_limits(lo, config->block_size);
if (error)
goto out_unlock;
loop_update_rotational(lo);
loop_update_dio(lo);
loop_sysfs_init(lo);
@ -1154,22 +1135,12 @@ out_putf:
return error;
}
static void __loop_clr_fd(struct loop_device *lo, bool release)
static void __loop_clr_fd(struct loop_device *lo)
{
struct queue_limits lim;
struct file *filp;
gfp_t gfp = lo->old_gfp_mask;
if (test_bit(QUEUE_FLAG_WC, &lo->lo_queue->queue_flags))
blk_queue_write_cache(lo->lo_queue, false, false);
/*
* Freeze the request queue when unbinding on a live file descriptor and
* thus an open device. When called from ->release we are guaranteed
* that there is no I/O in progress already.
*/
if (!release)
blk_mq_freeze_queue(lo->lo_queue);
spin_lock_irq(&lo->lo_lock);
filp = lo->lo_backing_file;
lo->lo_backing_file = NULL;
@ -1179,7 +1150,14 @@ static void __loop_clr_fd(struct loop_device *lo, bool release)
lo->lo_offset = 0;
lo->lo_sizelimit = 0;
memset(lo->lo_file_name, 0, LO_NAME_SIZE);
loop_reconfigure_limits(lo, 512, false);
/* reset the block size to the default */
lim = queue_limits_start_update(lo->lo_queue);
lim.logical_block_size = SECTOR_SIZE;
lim.physical_block_size = SECTOR_SIZE;
lim.io_min = SECTOR_SIZE;
queue_limits_commit_update(lo->lo_queue, &lim);
invalidate_disk(lo->lo_disk);
loop_sysfs_exit(lo);
/* let user-space know about this change */
@ -1187,8 +1165,6 @@ static void __loop_clr_fd(struct loop_device *lo, bool release)
mapping_set_gfp_mask(filp->f_mapping, gfp);
/* This is safe: open() is still holding a reference. */
module_put(THIS_MODULE);
if (!release)
blk_mq_unfreeze_queue(lo->lo_queue);
disk_force_media_change(lo->lo_disk);
@ -1203,11 +1179,7 @@ static void __loop_clr_fd(struct loop_device *lo, bool release)
* must be at least one and it can only become zero when the
* current holder is released.
*/
if (!release)
mutex_lock(&lo->lo_disk->open_mutex);
err = bdev_disk_changed(lo->lo_disk, false);
if (!release)
mutex_unlock(&lo->lo_disk->open_mutex);
if (err)
pr_warn("%s: partition scan of loop%d failed (rc=%d)\n",
__func__, lo->lo_number, err);
@ -1256,24 +1228,16 @@ static int loop_clr_fd(struct loop_device *lo)
return -ENXIO;
}
/*
* If we've explicitly asked to tear down the loop device,
* and it has an elevated reference count, set it for auto-teardown when
* the last reference goes away. This stops $!~#$@ udev from
* preventing teardown because it decided that it needs to run blkid on
* the loopback device whenever they appear. xfstests is notorious for
* failing tests because blkid via udev races with a losetup
* <dev>/do something like mkfs/losetup -d <dev> causing the losetup -d
* command to fail with EBUSY.
* Mark the device for removing the backing device on last close.
* If we are the only opener, also switch the state to roundown here to
* prevent new openers from coming in.
*/
if (disk_openers(lo->lo_disk) > 1) {
lo->lo_flags |= LO_FLAGS_AUTOCLEAR;
loop_global_unlock(lo, true);
return 0;
}
lo->lo_state = Lo_rundown;
lo->lo_flags |= LO_FLAGS_AUTOCLEAR;
if (disk_openers(lo->lo_disk) == 1)
lo->lo_state = Lo_rundown;
loop_global_unlock(lo, true);
__loop_clr_fd(lo, false);
return 0;
}
@ -1500,10 +1464,6 @@ static int loop_set_block_size(struct loop_device *lo, unsigned long arg)
if (lo->lo_state != Lo_bound)
return -ENXIO;
err = blk_validate_block_size(arg);
if (err)
return err;
if (lo->lo_queue->limits.logical_block_size == arg)
return 0;
@ -1511,7 +1471,7 @@ static int loop_set_block_size(struct loop_device *lo, unsigned long arg)
invalidate_bdev(lo->lo_device);
blk_mq_freeze_queue(lo->lo_queue);
err = loop_reconfigure_limits(lo, arg, false);
err = loop_reconfigure_limits(lo, arg);
loop_update_dio(lo);
blk_mq_unfreeze_queue(lo->lo_queue);
@ -1740,25 +1700,43 @@ static int lo_compat_ioctl(struct block_device *bdev, blk_mode_t mode,
}
#endif
static int lo_open(struct gendisk *disk, blk_mode_t mode)
{
struct loop_device *lo = disk->private_data;
int err;
err = mutex_lock_killable(&lo->lo_mutex);
if (err)
return err;
if (lo->lo_state == Lo_deleting || lo->lo_state == Lo_rundown)
err = -ENXIO;
mutex_unlock(&lo->lo_mutex);
return err;
}
static void lo_release(struct gendisk *disk)
{
struct loop_device *lo = disk->private_data;
bool need_clear = false;
if (disk_openers(disk) > 0)
return;
/*
* Clear the backing device information if this is the last close of
* a device that's been marked for auto clear, or on which LOOP_CLR_FD
* has been called.
*/
mutex_lock(&lo->lo_mutex);
if (lo->lo_state == Lo_bound && (lo->lo_flags & LO_FLAGS_AUTOCLEAR)) {
if (lo->lo_state == Lo_bound && (lo->lo_flags & LO_FLAGS_AUTOCLEAR))
lo->lo_state = Lo_rundown;
mutex_unlock(&lo->lo_mutex);
/*
* In autoclear mode, stop the loop thread
* and remove configuration after last close.
*/
__loop_clr_fd(lo, true);
return;
}
need_clear = (lo->lo_state == Lo_rundown);
mutex_unlock(&lo->lo_mutex);
if (need_clear)
__loop_clr_fd(lo);
}
static void lo_free_disk(struct gendisk *disk)
@ -1775,6 +1753,7 @@ static void lo_free_disk(struct gendisk *disk)
static const struct block_device_operations lo_fops = {
.owner = THIS_MODULE,
.open = lo_open,
.release = lo_release,
.ioctl = lo_ioctl,
#ifdef CONFIG_COMPAT
@ -1853,6 +1832,7 @@ static const struct kernel_param_ops loop_hw_qdepth_param_ops = {
device_param_cb(hw_queue_depth, &loop_hw_qdepth_param_ops, &hw_queue_depth, 0444);
MODULE_PARM_DESC(hw_queue_depth, "Queue depth for each hardware queue. Default: " __stringify(LOOP_DEFAULT_HW_Q_DEPTH));
MODULE_DESCRIPTION("Loopback device support");
MODULE_LICENSE("GPL");
MODULE_ALIAS_BLOCKDEV_MAJOR(LOOP_MAJOR);
@ -2059,14 +2039,6 @@ static int loop_add(int i)
}
lo->lo_queue = lo->lo_disk->queue;
/*
* By default, we do buffer IO, so it doesn't make sense to enable
* merge because the I/O submitted to backing file is handled page by
* page. For directio mode, merge does help to dispatch bigger request
* to underlayer disk. We will enable merge once directio is enabled.
*/
blk_queue_flag_set(QUEUE_FLAG_NOMERGES, lo->lo_queue);
/*
* Disable partition scanning by default. The in-kernel partition
* scanning can be requested individually per-device during its

2
drivers/block/mtip32xx/mtip32xx.c
View File

@ -3485,8 +3485,6 @@ skip_create_disk:
goto start_service_thread;
/* Set device limits. */
blk_queue_flag_set(QUEUE_FLAG_NONROT, dd->queue);
blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, dd->queue);
dma_set_max_seg_size(&dd->pdev->dev, 0x400000);
/* Set the capacity of the device in 512 byte sectors. */

2
drivers/block/n64cart.c
View File

@ -150,8 +150,6 @@ static int __init n64cart_probe(struct platform_device *pdev)
set_capacity(disk, size >> SECTOR_SHIFT);
set_disk_ro(disk, 1);
blk_queue_flag_set(QUEUE_FLAG_NONROT, disk->queue);
err = add_disk(disk);
if (err)
goto out_cleanup_disk;

26
drivers/block/nbd.c
View File

@ -342,6 +342,14 @@ static int __nbd_set_size(struct nbd_device *nbd, loff_t bytesize,
lim.max_hw_discard_sectors = UINT_MAX;
else
lim.max_hw_discard_sectors = 0;
if (!(nbd->config->flags & NBD_FLAG_SEND_FLUSH)) {
lim.features &= ~(BLK_FEAT_WRITE_CACHE | BLK_FEAT_FUA);
} else if (nbd->config->flags & NBD_FLAG_SEND_FUA) {
lim.features |= BLK_FEAT_WRITE_CACHE | BLK_FEAT_FUA;
} else {
lim.features |= BLK_FEAT_WRITE_CACHE;
lim.features &= ~BLK_FEAT_FUA;
}
lim.logical_block_size = blksize;
lim.physical_block_size = blksize;
error = queue_limits_commit_update(nbd->disk->queue, &lim);
@ -1279,19 +1287,10 @@ static void nbd_bdev_reset(struct nbd_device *nbd)
static void nbd_parse_flags(struct nbd_device *nbd)
{
struct nbd_config *config = nbd->config;
if (config->flags & NBD_FLAG_READ_ONLY)
if (nbd->config->flags & NBD_FLAG_READ_ONLY)
set_disk_ro(nbd->disk, true);
else
set_disk_ro(nbd->disk, false);
if (config->flags & NBD_FLAG_SEND_FLUSH) {
if (config->flags & NBD_FLAG_SEND_FUA)
blk_queue_write_cache(nbd->disk->queue, true, true);
else
blk_queue_write_cache(nbd->disk->queue, true, false);
}
else
blk_queue_write_cache(nbd->disk->queue, false, false);
}
static void send_disconnects(struct nbd_device *nbd)
@ -1801,7 +1800,7 @@ static struct nbd_device *nbd_dev_add(int index, unsigned int refs)
{
struct queue_limits lim = {
.max_hw_sectors = 65536,
.max_user_sectors = 256,
.io_opt = 256 << SECTOR_SHIFT,
.max_segments = USHRT_MAX,
.max_segment_size = UINT_MAX,
};
@ -1861,11 +1860,6 @@ static struct nbd_device *nbd_dev_add(int index, unsigned int refs)
goto out_err_disk;
}
/*
* Tell the block layer that we are not a rotational device
*/
blk_queue_flag_set(QUEUE_FLAG_NONROT, disk->queue);
mutex_init(&nbd->config_lock);
refcount_set(&nbd->config_refs, 0);
/*

29
drivers/block/null_blk/main.c
View File

@ -77,7 +77,7 @@ enum {
NULL_IRQ_TIMER = 2,
};
static bool g_virt_boundary = false;
static bool g_virt_boundary;
module_param_named(virt_boundary, g_virt_boundary, bool, 0444);
MODULE_PARM_DESC(virt_boundary, "Require a virtual boundary for the device. Default: False");
@ -227,7 +227,7 @@ MODULE_PARM_DESC(mbps, "Cache size in MiB for memory-backed device. Default: 0 (
static bool g_fua = true;
module_param_named(fua, g_fua, bool, 0444);
MODULE_PARM_DESC(zoned, "Enable/disable FUA support when cache_size is used. Default: true");
MODULE_PARM_DESC(fua, "Enable/disable FUA support when cache_size is used. Default: true");
static unsigned int g_mbps;
module_param_named(mbps, g_mbps, uint, 0444);
@ -262,6 +262,10 @@ module_param_named(zone_append_max_sectors, g_zone_append_max_sectors, int, 0444
MODULE_PARM_DESC(zone_append_max_sectors,
"Maximum size of a zone append command (in 512B sectors). Specify 0 for zone append emulation");
static bool g_zone_full;
module_param_named(zone_full, g_zone_full, bool, S_IRUGO);
MODULE_PARM_DESC(zone_full, "Initialize the sequential write required zones of a zoned device to be full. Default: false");
static struct nullb_device *null_alloc_dev(void);
static void null_free_dev(struct nullb_device *dev);
static void null_del_dev(struct nullb *nullb);
@ -458,6 +462,7 @@ NULLB_DEVICE_ATTR(zone_nr_conv, uint, NULL);
NULLB_DEVICE_ATTR(zone_max_open, uint, NULL);
NULLB_DEVICE_ATTR(zone_max_active, uint, NULL);
NULLB_DEVICE_ATTR(zone_append_max_sectors, uint, NULL);
NULLB_DEVICE_ATTR(zone_full, bool, NULL);
NULLB_DEVICE_ATTR(virt_boundary, bool, NULL);
NULLB_DEVICE_ATTR(no_sched, bool, NULL);
NULLB_DEVICE_ATTR(shared_tags, bool, NULL);
@ -610,6 +615,7 @@ static struct configfs_attribute *nullb_device_attrs[] = {
&nullb_device_attr_zone_append_max_sectors,
&nullb_device_attr_zone_readonly,
&nullb_device_attr_zone_offline,
&nullb_device_attr_zone_full,
&nullb_device_attr_virt_boundary,
&nullb_device_attr_no_sched,
&nullb_device_attr_shared_tags,
@ -700,7 +706,7 @@ static ssize_t memb_group_features_show(struct config_item *item, char *page)
"shared_tags,size,submit_queues,use_per_node_hctx,"
"virt_boundary,zoned,zone_capacity,zone_max_active,"
"zone_max_open,zone_nr_conv,zone_offline,zone_readonly,"
"zone_size,zone_append_max_sectors\n");
"zone_size,zone_append_max_sectors,zone_full\n");
}
CONFIGFS_ATTR_RO(memb_group_, features);
@ -781,6 +787,7 @@ static struct nullb_device *null_alloc_dev(void)
dev->zone_max_open = g_zone_max_open;
dev->zone_max_active = g_zone_max_active;
dev->zone_append_max_sectors = g_zone_append_max_sectors;
dev->zone_full = g_zone_full;
dev->virt_boundary = g_virt_boundary;
dev->no_sched = g_no_sched;
dev->shared_tags = g_shared_tags;
@ -1824,9 +1831,6 @@ static int null_validate_conf(struct nullb_device *dev)
dev->queue_mode = NULL_Q_MQ;
}
if (blk_validate_block_size(dev->blocksize))
return -EINVAL;
if (dev->use_per_node_hctx) {
if (dev->submit_queues != nr_online_nodes)
dev->submit_queues = nr_online_nodes;
@ -1928,6 +1932,13 @@ static int null_add_dev(struct nullb_device *dev)
goto out_cleanup_tags;
}
if (dev->cache_size > 0) {
set_bit(NULLB_DEV_FL_CACHE, &nullb->dev->flags);
lim.features |= BLK_FEAT_WRITE_CACHE;
if (dev->fua)
lim.features |= BLK_FEAT_FUA;
}
nullb->disk = blk_mq_alloc_disk(nullb->tag_set, &lim, nullb);
if (IS_ERR(nullb->disk)) {
rv = PTR_ERR(nullb->disk);
@ -1940,13 +1951,7 @@ static int null_add_dev(struct nullb_device *dev)
nullb_setup_bwtimer(nullb);
}
if (dev->cache_size > 0) {
set_bit(NULLB_DEV_FL_CACHE, &nullb->dev->flags);
blk_queue_write_cache(nullb->q, true, dev->fua);
}
nullb->q->queuedata = nullb;
blk_queue_flag_set(QUEUE_FLAG_NONROT, nullb->q);
rv = ida_alloc(&nullb_indexes, GFP_KERNEL);
if (rv < 0)

1
drivers/block/null_blk/null_blk.h
View File

@ -101,6 +101,7 @@ struct nullb_device {
bool memory_backed; /* if data is stored in memory */
bool discard; /* if support discard */
bool zoned; /* if device is zoned */
bool zone_full; /* Initialize zones to be full */
bool virt_boundary; /* virtual boundary on/off for the device */
bool no_sched; /* no IO scheduler for the device */
bool shared_tags; /* share tag set between devices for blk-mq */

15
drivers/block/null_blk/zoned.c
View File

@ -145,7 +145,7 @@ int null_init_zoned_dev(struct nullb_device *dev,
zone = &dev->zones[i];
null_init_zone_lock(dev, zone);
zone->start = zone->wp = sector;
zone->start = sector;
if (zone->start + dev->zone_size_sects > dev_capacity_sects)
zone->len = dev_capacity_sects - zone->start;
else
@ -153,12 +153,18 @@ int null_init_zoned_dev(struct nullb_device *dev,
zone->capacity =
min_t(sector_t, zone->len, zone_capacity_sects);
zone->type = BLK_ZONE_TYPE_SEQWRITE_REQ;
zone->cond = BLK_ZONE_COND_EMPTY;
if (dev->zone_full) {
zone->cond = BLK_ZONE_COND_FULL;
zone->wp = zone->start + zone->capacity;
} else{
zone->cond = BLK_ZONE_COND_EMPTY;
zone->wp = zone->start;
}
sector += dev->zone_size_sects;
}
lim->zoned = true;
lim->features |= BLK_FEAT_ZONED;
lim->chunk_sectors = dev->zone_size_sects;
lim->max_zone_append_sectors = dev->zone_append_max_sectors;
lim->max_open_zones = dev->zone_max_open;
@ -171,9 +177,6 @@ int null_register_zoned_dev(struct nullb *nullb)
struct request_queue *q = nullb->q;
struct gendisk *disk = nullb->disk;
blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, q);
disk->nr_zones = bdev_nr_zones(disk->part0);
pr_info("%s: using %s zone append\n",
disk->disk_name,
queue_emulates_zone_append(q) ? "emulated" : "native");

1
drivers/block/pktcdvd.c
View File

@ -2622,6 +2622,7 @@ static int pkt_setup_dev(dev_t dev, dev_t* pkt_dev)
struct queue_limits lim = {
.max_hw_sectors = PACKET_MAX_SECTORS,
.logical_block_size = CD_FRAMESIZE,
.features = BLK_FEAT_ROTATIONAL,
};
int idx;
int ret = -ENOMEM;

8
drivers/block/ps3disk.c
View File

@ -388,9 +388,9 @@ static int ps3disk_probe(struct ps3_system_bus_device *_dev)
.max_segments = -1,
.max_segment_size = dev->bounce_size,
.dma_alignment = dev->blk_size - 1,
.features = BLK_FEAT_WRITE_CACHE |
BLK_FEAT_ROTATIONAL,
};
struct request_queue *queue;
struct gendisk *gendisk;
if (dev->blk_size < 512) {
@ -447,10 +447,6 @@ static int ps3disk_probe(struct ps3_system_bus_device *_dev)
goto fail_free_tag_set;
}
queue = gendisk->queue;
blk_queue_write_cache(queue, true, false);
priv->gendisk = gendisk;
gendisk->major = ps3disk_major;
gendisk->first_minor = devidx * PS3DISK_MINORS;

15
drivers/block/rbd.c
View File

@ -4949,14 +4949,12 @@ static const struct blk_mq_ops rbd_mq_ops = {
static int rbd_init_disk(struct rbd_device *rbd_dev)
{
struct gendisk *disk;
struct request_queue *q;
unsigned int objset_bytes =
rbd_dev->layout.object_size * rbd_dev->layout.stripe_count;
struct queue_limits lim = {
.max_hw_sectors = objset_bytes >> SECTOR_SHIFT,
.max_user_sectors = objset_bytes >> SECTOR_SHIFT,
.io_opt = objset_bytes,
.io_min = rbd_dev->opts->alloc_size,
.io_opt = rbd_dev->opts->alloc_size,
.max_segments = USHRT_MAX,
.max_segment_size = UINT_MAX,
};
@ -4980,12 +4978,14 @@ static int rbd_init_disk(struct rbd_device *rbd_dev)
lim.max_write_zeroes_sectors = objset_bytes >> SECTOR_SHIFT;
}
if (!ceph_test_opt(rbd_dev->rbd_client->client, NOCRC))
lim.features |= BLK_FEAT_STABLE_WRITES;
disk = blk_mq_alloc_disk(&rbd_dev->tag_set, &lim, rbd_dev);
if (IS_ERR(disk)) {
err = PTR_ERR(disk);
goto out_tag_set;
}
q = disk->queue;
snprintf(disk->disk_name, sizeof(disk->disk_name), RBD_DRV_NAME "%d",
rbd_dev->dev_id);
@ -4997,13 +4997,6 @@ static int rbd_init_disk(struct rbd_device *rbd_dev)
disk->minors = RBD_MINORS_PER_MAJOR;
disk->fops = &rbd_bd_ops;
disk->private_data = rbd_dev;
blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
/* QUEUE_FLAG_ADD_RANDOM is off by default for blk-mq */
if (!ceph_test_opt(rbd_dev->rbd_client->client, NOCRC))
blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, q);
rbd_dev->disk = disk;
return 0;

2
drivers/block/rnbd/rnbd-clt-sysfs.c
View File

@ -475,7 +475,7 @@ void rnbd_clt_remove_dev_symlink(struct rnbd_clt_dev *dev)
}
}
static struct kobj_type rnbd_dev_ktype = {
static const struct kobj_type rnbd_dev_ktype = {
.sysfs_ops = &kobj_sysfs_ops,
.default_groups = rnbd_dev_groups,
};

16
drivers/block/rnbd/rnbd-clt.c
View File

@ -1352,10 +1352,6 @@ static int rnbd_clt_setup_gen_disk(struct rnbd_clt_dev *dev,
if (dev->access_mode == RNBD_ACCESS_RO)
set_disk_ro(dev->gd, true);
/*
* Network device does not need rotational
*/
blk_queue_flag_set(QUEUE_FLAG_NONROT, dev->queue);
err = add_disk(dev->gd);
if (err)
put_disk(dev->gd);
@ -1389,18 +1385,18 @@ static int rnbd_client_setup_device(struct rnbd_clt_dev *dev,
le32_to_cpu(rsp->max_discard_sectors);
}
if (rsp->cache_policy & RNBD_WRITEBACK) {
lim.features |= BLK_FEAT_WRITE_CACHE;
if (rsp->cache_policy & RNBD_FUA)
lim.features |= BLK_FEAT_FUA;
}
dev->gd = blk_mq_alloc_disk(&dev->sess->tag_set, &lim, dev);
if (IS_ERR(dev->gd))
return PTR_ERR(dev->gd);
dev->queue = dev->gd->queue;
rnbd_init_mq_hw_queues(dev);
blk_queue_flag_set(QUEUE_FLAG_SAME_COMP, dev->queue);
blk_queue_flag_set(QUEUE_FLAG_SAME_FORCE, dev->queue);
blk_queue_write_cache(dev->queue,
!!(rsp->cache_policy & RNBD_WRITEBACK),
!!(rsp->cache_policy & RNBD_FUA));
return rnbd_clt_setup_gen_disk(dev, rsp, idx);
}

4
drivers/block/rnbd/rnbd-srv-sysfs.c
View File

@ -33,7 +33,7 @@ static void rnbd_srv_dev_release(struct kobject *kobj)
kfree(dev);
}
static struct kobj_type dev_ktype = {
static const struct kobj_type dev_ktype = {
.sysfs_ops = &kobj_sysfs_ops,
.release = rnbd_srv_dev_release
};
@ -184,7 +184,7 @@ static void rnbd_srv_sess_dev_release(struct kobject *kobj)
rnbd_destroy_sess_dev(sess_dev, sess_dev->keep_id);
}
static struct kobj_type rnbd_srv_sess_dev_ktype = {
static const struct kobj_type rnbd_srv_sess_dev_ktype = {
.sysfs_ops = &kobj_sysfs_ops,
.release = rnbd_srv_sess_dev_release,
};

73
drivers/block/rnull.rs Normal file
View File

@ -0,0 +1,73 @@
// SPDX-License-Identifier: GPL-2.0
//! This is a Rust implementation of the C null block driver.
//!
//! Supported features:
//!
//! - blk-mq interface
//! - direct completion
//! - block size 4k
//!
//! The driver is not configurable.
use kernel::{
alloc::flags,
block::mq::{
self,
gen_disk::{self, GenDisk},
Operations, TagSet,
},
error::Result,
new_mutex, pr_info,
prelude::*,
sync::{Arc, Mutex},
types::ARef,
};
module! {
type: NullBlkModule,
name: "rnull_mod",
author: "Andreas Hindborg",
license: "GPL v2",
}
struct NullBlkModule {
_disk: Pin<Box<Mutex<GenDisk<NullBlkDevice>>>>,
}
impl kernel::Module for NullBlkModule {
fn init(_module: &'static ThisModule) -> Result<Self> {
pr_info!("Rust null_blk loaded\n");
let tagset = Arc::pin_init(TagSet::new(1, 256, 1), flags::GFP_KERNEL)?;
let disk = gen_disk::GenDiskBuilder::new()
.capacity_sectors(4096 << 11)
.logical_block_size(4096)?
.physical_block_size(4096)?
.rotational(false)
.build(format_args!("rnullb{}", 0), tagset)?;
let disk = Box::pin_init(new_mutex!(disk, "nullb:disk"), flags::GFP_KERNEL)?;
Ok(Self { _disk: disk })
}
}
struct NullBlkDevice;
#[vtable]
impl Operations for NullBlkDevice {
#[inline(always)]
fn queue_rq(rq: ARef<mq::Request<Self>>, _is_last: bool) -> Result {
mq::Request::end_ok(rq)
.map_err(|_e| kernel::error::code::EIO)
// We take no refcounts on the request, so we expect to be able to
// end the request. The request reference must be unique at this
// point, and so `end_ok` cannot fail.
.expect("Fatal error - expected to be able to end request");
Ok(())
}
fn commit_rqs() {}
}

1
drivers/block/sunvdc.c
View File

@ -791,6 +791,7 @@ static int probe_disk(struct vdc_port *port)
.seg_boundary_mask = PAGE_SIZE - 1,
.max_segment_size = PAGE_SIZE,
.max_segments = port->ring_cookies,
.features = BLK_FEAT_ROTATIONAL,
};
struct request_queue *q;
struct gendisk *g;

5
drivers/block/swim.c
View File

@ -787,6 +787,9 @@ static void swim_cleanup_floppy_disk(struct floppy_state *fs)
static int swim_floppy_init(struct swim_priv *swd)
{
struct queue_limits lim = {
.features = BLK_FEAT_ROTATIONAL,
};
int err;
int drive;
struct swim __iomem *base = swd->base;
@ -820,7 +823,7 @@ static int swim_floppy_init(struct swim_priv *swd)
goto exit_put_disks;
swd->unit[drive].disk =
blk_mq_alloc_disk(&swd->unit[drive].tag_set, NULL,
blk_mq_alloc_disk(&swd->unit[drive].tag_set, &lim,
&swd->unit[drive]);
if (IS_ERR(swd->unit[drive].disk)) {
blk_mq_free_tag_set(&swd->unit[drive].tag_set);

5
drivers/block/swim3.c
View File

@ -1189,6 +1189,9 @@ static int swim3_add_device(struct macio_dev *mdev, int index)
static int swim3_attach(struct macio_dev *mdev,
const struct of_device_id *match)
{
struct queue_limits lim = {
.features = BLK_FEAT_ROTATIONAL,
};
struct floppy_state *fs;
struct gendisk *disk;
int rc;
@ -1210,7 +1213,7 @@ static int swim3_attach(struct macio_dev *mdev,
if (rc)
goto out_unregister;
disk = blk_mq_alloc_disk(&fs->tag_set, NULL, fs);
disk = blk_mq_alloc_disk(&fs->tag_set, &lim, fs);
if (IS_ERR(disk)) {
rc = PTR_ERR(disk);
goto out_free_tag_set;

22
drivers/block/ublk_drv.c
View File

@ -248,8 +248,6 @@ static int ublk_dev_param_zoned_validate(const struct ublk_device *ub)
static void ublk_dev_param_zoned_apply(struct ublk_device *ub)
{
blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, ub->ub_disk->queue);
ub->ub_disk->nr_zones = ublk_get_nr_zones(ub);
}
@ -484,16 +482,8 @@ static inline unsigned ublk_pos_to_tag(loff_t pos)
static void ublk_dev_param_basic_apply(struct ublk_device *ub)
{
struct request_queue *q = ub->ub_disk->queue;
const struct ublk_param_basic *p = &ub->params.basic;
blk_queue_write_cache(q, p->attrs & UBLK_ATTR_VOLATILE_CACHE,
p->attrs & UBLK_ATTR_FUA);
if (p->attrs & UBLK_ATTR_ROTATIONAL)
blk_queue_flag_clear(QUEUE_FLAG_NONROT, q);
else
blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
if (p->attrs & UBLK_ATTR_READ_ONLY)
set_disk_ro(ub->ub_disk, true);
@ -2204,12 +2194,21 @@ static int ublk_ctrl_start_dev(struct ublk_device *ub, struct io_uring_cmd *cmd)
if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED))
return -EOPNOTSUPP;
lim.zoned = true;
lim.features |= BLK_FEAT_ZONED;
lim.max_active_zones = p->max_active_zones;
lim.max_open_zones = p->max_open_zones;
lim.max_zone_append_sectors = p->max_zone_append_sectors;
}
if (ub->params.basic.attrs & UBLK_ATTR_VOLATILE_CACHE) {
lim.features |= BLK_FEAT_WRITE_CACHE;
if (ub->params.basic.attrs & UBLK_ATTR_FUA)
lim.features |= BLK_FEAT_FUA;
}
if (ub->params.basic.attrs & UBLK_ATTR_ROTATIONAL)
lim.features |= BLK_FEAT_ROTATIONAL;
if (wait_for_completion_interruptible(&ub->completion) != 0)
return -EINTR;
@ -3017,4 +3016,5 @@ module_param_cb(ublks_max, &ublk_max_ublks_ops, &ublks_max, 0644);
MODULE_PARM_DESC(ublks_max, "max number of ublk devices allowed to add(default: 64)");
MODULE_AUTHOR("Ming Lei <ming.lei@redhat.com>");
MODULE_DESCRIPTION("Userspace block device");
MODULE_LICENSE("GPL");

68
drivers/block/virtio_blk.c
View File

@ -728,7 +728,7 @@ static int virtblk_read_zoned_limits(struct virtio_blk *vblk,
dev_dbg(&vdev->dev, "probing host-managed zoned device\n");
lim->zoned = true;
lim->features |= BLK_FEAT_ZONED;
virtio_cread(vdev, struct virtio_blk_config,
zoned.max_open_zones, &v);
@ -1089,14 +1089,6 @@ static int virtblk_get_cache_mode(struct virtio_device *vdev)
return writeback;
}
static void virtblk_update_cache_mode(struct virtio_device *vdev)
{
u8 writeback = virtblk_get_cache_mode(vdev);
struct virtio_blk *vblk = vdev->priv;
blk_queue_write_cache(vblk->disk->queue, writeback, false);
}
static const char *const virtblk_cache_types[] = {
"write through", "write back"
};
@ -1108,6 +1100,7 @@ cache_type_store(struct device *dev, struct device_attribute *attr,
struct gendisk *disk = dev_to_disk(dev);
struct virtio_blk *vblk = disk->private_data;
struct virtio_device *vdev = vblk->vdev;
struct queue_limits lim;
int i;
BUG_ON(!virtio_has_feature(vblk->vdev, VIRTIO_BLK_F_CONFIG_WCE));
@ -1116,7 +1109,17 @@ cache_type_store(struct device *dev, struct device_attribute *attr,
return i;
virtio_cwrite8(vdev, offsetof(struct virtio_blk_config, wce), i);
virtblk_update_cache_mode(vdev);
lim = queue_limits_start_update(disk->queue);
if (virtblk_get_cache_mode(vdev))
lim.features |= BLK_FEAT_WRITE_CACHE;
else
lim.features &= ~BLK_FEAT_WRITE_CACHE;
blk_mq_freeze_queue(disk->queue);
i = queue_limits_commit_update(disk->queue, &lim);
blk_mq_unfreeze_queue(disk->queue);
if (i)
return i;
return count;
}
@ -1247,7 +1250,7 @@ static int virtblk_read_limits(struct virtio_blk *vblk,
struct queue_limits *lim)
{
struct virtio_device *vdev = vblk->vdev;
u32 v, blk_size, max_size, sg_elems, opt_io_size;
u32 v, max_size, sg_elems, opt_io_size;
u32 max_discard_segs = 0;
u32 discard_granularity = 0;
u16 min_io_size;
@ -1286,46 +1289,36 @@ static int virtblk_read_limits(struct virtio_blk *vblk,
lim->max_segment_size = max_size;
/* Host can optionally specify the block size of the device */
err = virtio_cread_feature(vdev, VIRTIO_BLK_F_BLK_SIZE,
virtio_cread_feature(vdev, VIRTIO_BLK_F_BLK_SIZE,
struct virtio_blk_config, blk_size,
&blk_size);
if (!err) {
err = blk_validate_block_size(blk_size);
if (err) {
dev_err(&vdev->dev,
"virtio_blk: invalid block size: 0x%x\n",
blk_size);
return err;
}
lim->logical_block_size = blk_size;
} else
blk_size = lim->logical_block_size;
&lim->logical_block_size);
/* Use topology information if available */
err = virtio_cread_feature(vdev, VIRTIO_BLK_F_TOPOLOGY,
struct virtio_blk_config, physical_block_exp,
&physical_block_exp);
if (!err && physical_block_exp)
lim->physical_block_size = blk_size * (1 << physical_block_exp);
lim->physical_block_size =
lim->logical_block_size * (1 << physical_block_exp);
err = virtio_cread_feature(vdev, VIRTIO_BLK_F_TOPOLOGY,
struct virtio_blk_config, alignment_offset,
&alignment_offset);
if (!err && alignment_offset)
lim->alignment_offset = blk_size * alignment_offset;
lim->alignment_offset =
lim->logical_block_size * alignment_offset;
err = virtio_cread_feature(vdev, VIRTIO_BLK_F_TOPOLOGY,
struct virtio_blk_config, min_io_size,
&min_io_size);
if (!err && min_io_size)
lim->io_min = blk_size * min_io_size;
lim->io_min = lim->logical_block_size * min_io_size;
err = virtio_cread_feature(vdev, VIRTIO_BLK_F_TOPOLOGY,
struct virtio_blk_config, opt_io_size,
&opt_io_size);
if (!err && opt_io_size)
lim->io_opt = blk_size * opt_io_size;
lim->io_opt = lim->logical_block_size * opt_io_size;
if (virtio_has_feature(vdev, VIRTIO_BLK_F_DISCARD)) {
virtio_cread(vdev, struct virtio_blk_config,
@ -1419,7 +1412,7 @@ static int virtblk_read_limits(struct virtio_blk *vblk,
lim->discard_granularity =
discard_granularity << SECTOR_SHIFT;
else
lim->discard_granularity = blk_size;
lim->discard_granularity = lim->logical_block_size;
}
if (virtio_has_feature(vdev, VIRTIO_BLK_F_ZONED)) {
@ -1448,7 +1441,10 @@ static int virtblk_read_limits(struct virtio_blk *vblk,
static int virtblk_probe(struct virtio_device *vdev)
{
struct virtio_blk *vblk;
struct queue_limits lim = { };
struct queue_limits lim = {
.features = BLK_FEAT_ROTATIONAL,
.logical_block_size = SECTOR_SIZE,
};
int err, index;
unsigned int queue_depth;
@ -1512,6 +1508,9 @@ static int virtblk_probe(struct virtio_device *vdev)
if (err)
goto out_free_tags;
if (virtblk_get_cache_mode(vdev))
lim.features |= BLK_FEAT_WRITE_CACHE;
vblk->disk = blk_mq_alloc_disk(&vblk->tag_set, &lim, vblk);
if (IS_ERR(vblk->disk)) {
err = PTR_ERR(vblk->disk);
@ -1527,9 +1526,6 @@ static int virtblk_probe(struct virtio_device *vdev)
vblk->disk->fops = &virtblk_fops;
vblk->index = index;
/* configure queue flush support */
virtblk_update_cache_mode(vdev);
/* If disk is read-only in the host, the guest should obey */
if (virtio_has_feature(vdev, VIRTIO_BLK_F_RO))
set_disk_ro(vblk->disk, 1);
@ -1541,8 +1537,8 @@ static int virtblk_probe(struct virtio_device *vdev)
* All steps that follow use the VQs therefore they need to be
* placed after the virtio_device_ready() call above.
*/
if (IS_ENABLED(CONFIG_BLK_DEV_ZONED) && lim.zoned) {
blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, vblk->disk->queue);
if (IS_ENABLED(CONFIG_BLK_DEV_ZONED) &&
(lim.features & BLK_FEAT_ZONED)) {
err = blk_revalidate_disk_zones(vblk->disk);
if (err)
goto out_cleanup_disk;

1
drivers/block/xen-blkback/blkback.c
View File

@ -1563,5 +1563,6 @@ static void __exit xen_blkif_fini(void)
module_exit(xen_blkif_fini);
MODULE_DESCRIPTION("Virtual block device back-end driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS("xen-backend:vbd");

73
drivers/block/xen-blkfront.c
View File

@ -788,6 +788,11 @@ static int blkif_queue_rw_req(struct request *req, struct blkfront_ring_info *ri
* A barrier request a superset of FUA, so we can
* implement it the same way. (It's also a FLUSH+FUA,
* since it is guaranteed ordered WRT previous writes.)
*
* Note that can end up here with a FUA write and the
* flags cleared. This happens when the flag was
* run-time disabled after a failing I/O, and we'll
* simplify submit it as a normal write.
*/
if (info->feature_flush && info->feature_fua)
ring_req->operation =
@ -795,8 +800,6 @@ static int blkif_queue_rw_req(struct request *req, struct blkfront_ring_info *ri
else if (info->feature_flush)
ring_req->operation =
BLKIF_OP_FLUSH_DISKCACHE;
else
ring_req->operation = 0;
}
ring_req->u.rw.nr_segments = num_grant;
if (unlikely(require_extra_req)) {
@ -887,16 +890,6 @@ static inline void flush_requests(struct blkfront_ring_info *rinfo)
notify_remote_via_irq(rinfo->irq);
}
static inline bool blkif_request_flush_invalid(struct request *req,
struct blkfront_info *info)
{
return (blk_rq_is_passthrough(req) ||
((req_op(req) == REQ_OP_FLUSH) &&
!info->feature_flush) ||
((req->cmd_flags & REQ_FUA) &&
!info->feature_fua));
}
static blk_status_t blkif_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *qd)
{
@ -908,12 +901,22 @@ static blk_status_t blkif_queue_rq(struct blk_mq_hw_ctx *hctx,
rinfo = get_rinfo(info, qid);
blk_mq_start_request(qd->rq);
spin_lock_irqsave(&rinfo->ring_lock, flags);
/*
* Check if the backend actually supports flushes.
*
* While the block layer won't send us flushes if we don't claim to
* support them, the Xen protocol allows the backend to revoke support
* at any time. That is of course a really bad idea and dangerous, but
* has been allowed for 10+ years. In that case we simply clear the
* flags, and directly return here for an empty flush and ignore the
* FUA flag later on.
*/
if (unlikely(req_op(qd->rq) == REQ_OP_FLUSH && !info->feature_flush))
goto complete;
if (RING_FULL(&rinfo->ring))
goto out_busy;
if (blkif_request_flush_invalid(qd->rq, rinfo->dev_info))
goto out_err;
if (blkif_queue_request(qd->rq, rinfo))
goto out_busy;
@ -921,14 +924,14 @@ static blk_status_t blkif_queue_rq(struct blk_mq_hw_ctx *hctx,
spin_unlock_irqrestore(&rinfo->ring_lock, flags);
return BLK_STS_OK;
out_err:
spin_unlock_irqrestore(&rinfo->ring_lock, flags);
return BLK_STS_IOERR;
out_busy:
blk_mq_stop_hw_queue(hctx);
spin_unlock_irqrestore(&rinfo->ring_lock, flags);
return BLK_STS_DEV_RESOURCE;
complete:
spin_unlock_irqrestore(&rinfo->ring_lock, flags);
blk_mq_end_request(qd->rq, BLK_STS_OK);
return BLK_STS_OK;
}
static void blkif_complete_rq(struct request *rq)
@ -956,6 +959,12 @@ static void blkif_set_queue_limits(const struct blkfront_info *info,
lim->max_secure_erase_sectors = UINT_MAX;
}
if (info->feature_flush) {
lim->features |= BLK_FEAT_WRITE_CACHE;
if (info->feature_fua)
lim->features |= BLK_FEAT_FUA;
}
/* Hard sector size and max sectors impersonate the equiv. hardware. */
lim->logical_block_size = info->sector_size;
lim->physical_block_size = info->physical_sector_size;
@ -984,8 +993,6 @@ static const char *flush_info(struct blkfront_info *info)
static void xlvbd_flush(struct blkfront_info *info)
{
blk_queue_write_cache(info->rq, info->feature_flush ? true : false,
info->feature_fua ? true : false);
pr_info("blkfront: %s: %s %s %s %s %s %s %s\n",
info->gd->disk_name, flush_info(info),
"persistent grants:", info->feature_persistent ?
@ -1063,8 +1070,7 @@ static char *encode_disk_name(char *ptr, unsigned int n)
}
static int xlvbd_alloc_gendisk(blkif_sector_t capacity,
struct blkfront_info *info, u16 sector_size,
unsigned int physical_sector_size)
struct blkfront_info *info)
{
struct queue_limits lim = {};
struct gendisk *gd;
@ -1139,7 +1145,6 @@ static int xlvbd_alloc_gendisk(blkif_sector_t capacity,
err = PTR_ERR(gd);
goto out_free_tag_set;
}
blk_queue_flag_set(QUEUE_FLAG_VIRT, gd->queue);
strcpy(gd->disk_name, DEV_NAME);
ptr = encode_disk_name(gd->disk_name + sizeof(DEV_NAME) - 1, offset);
@ -1159,8 +1164,6 @@ static int xlvbd_alloc_gendisk(blkif_sector_t capacity,
info->rq = gd->queue;
info->gd = gd;
info->sector_size = sector_size;
info->physical_sector_size = physical_sector_size;
xlvbd_flush(info);
@ -1605,8 +1608,8 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id)
blkif_req(req)->error = BLK_STS_NOTSUPP;
info->feature_discard = 0;
info->feature_secdiscard = 0;
blk_queue_max_discard_sectors(rq, 0);
blk_queue_max_secure_erase_sectors(rq, 0);
blk_queue_disable_discard(rq);
blk_queue_disable_secure_erase(rq);
}
break;
case BLKIF_OP_FLUSH_DISKCACHE:
@ -1627,7 +1630,6 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id)
blkif_req(req)->error = BLK_STS_OK;
info->feature_fua = 0;
info->feature_flush = 0;
xlvbd_flush(info);
}
fallthrough;
case BLKIF_OP_READ:
@ -2315,8 +2317,6 @@ static void blkfront_gather_backend_features(struct blkfront_info *info)
static void blkfront_connect(struct blkfront_info *info)
{
unsigned long long sectors;
unsigned long sector_size;
unsigned int physical_sector_size;
int err, i;
struct blkfront_ring_info *rinfo;
@ -2355,7 +2355,7 @@ static void blkfront_connect(struct blkfront_info *info)
err = xenbus_gather(XBT_NIL, info->xbdev->otherend,
"sectors", "%llu", &sectors,
"info", "%u", &info->vdisk_info,
"sector-size", "%lu", &sector_size,
"sector-size", "%lu", &info->sector_size,
NULL);
if (err) {
xenbus_dev_fatal(info->xbdev, err,
@ -2369,9 +2369,9 @@ static void blkfront_connect(struct blkfront_info *info)
* provide this. Assume physical sector size to be the same as
* sector_size in that case.
*/
physical_sector_size = xenbus_read_unsigned(info->xbdev->otherend,
info->physical_sector_size = xenbus_read_unsigned(info->xbdev->otherend,
"physical-sector-size",
sector_size);
info->sector_size);
blkfront_gather_backend_features(info);
for_each_rinfo(info, rinfo, i) {
err = blkfront_setup_indirect(rinfo);
@ -2383,8 +2383,7 @@ static void blkfront_connect(struct blkfront_info *info)
}
}
err = xlvbd_alloc_gendisk(sectors, info, sector_size,
physical_sector_size);
err = xlvbd_alloc_gendisk(sectors, info);
if (err) {
xenbus_dev_fatal(info->xbdev, err, "xlvbd_add at %s",
info->xbdev->otherend);

1
drivers/block/z2ram.c
View File

@ -409,4 +409,5 @@ static void __exit z2_exit(void)
module_init(z2_init);
module_exit(z2_exit);
MODULE_DESCRIPTION("Amiga Zorro II ramdisk driver");
MODULE_LICENSE("GPL");

6
drivers/block/zram/zram_drv.c
View File

@ -2208,6 +2208,8 @@ static int zram_add(void)
#if ZRAM_LOGICAL_BLOCK_SIZE == PAGE_SIZE
.max_write_zeroes_sectors = UINT_MAX,
#endif
.features = BLK_FEAT_STABLE_WRITES |
BLK_FEAT_SYNCHRONOUS,
};
struct zram *zram;
int ret, device_id;
@ -2245,10 +2247,6 @@ static int zram_add(void)
/* Actual capacity set using sysfs (/sys/block/zram<id>/disksize */
set_capacity(zram->disk, 0);
/* zram devices sort of resembles non-rotational disks */
blk_queue_flag_set(QUEUE_FLAG_NONROT, zram->disk->queue);
blk_queue_flag_set(QUEUE_FLAG_SYNCHRONOUS, zram->disk->queue);
blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, zram->disk->queue);
ret = device_add_disk(NULL, zram->disk, zram_disk_groups);
if (ret)
goto out_cleanup_disk;

1
drivers/cdrom/cdrom.c
View File

@ -3708,4 +3708,5 @@ static void __exit cdrom_exit(void)
module_init(cdrom_init);
module_exit(cdrom_exit);
MODULE_DESCRIPTION("Uniform CD-ROM driver");
MODULE_LICENSE("GPL");

1
drivers/cdrom/gdrom.c
View File

@ -744,6 +744,7 @@ static int probe_gdrom(struct platform_device *devptr)
.max_segments = 1,
/* set a large max size to get most from DMA */
.max_segment_size = 0x40000,
.features = BLK_FEAT_ROTATIONAL,
};
int err;

13
drivers/md/bcache/super.c
View File

@ -897,7 +897,6 @@ static int bcache_device_init(struct bcache_device *d, unsigned int block_size,
sector_t sectors, struct block_device *cached_bdev,
const struct block_device_operations *ops)
{
struct request_queue *q;
const size_t max_stripes = min_t(size_t, INT_MAX,
SIZE_MAX / sizeof(atomic_t));
struct queue_limits lim = {
@ -909,6 +908,7 @@ static int bcache_device_init(struct bcache_device *d, unsigned int block_size,
.io_min = block_size,
.logical_block_size = block_size,
.physical_block_size = block_size,
.features = BLK_FEAT_WRITE_CACHE | BLK_FEAT_FUA,
};
uint64_t n;
int idx;
@ -974,13 +974,6 @@ static int bcache_device_init(struct bcache_device *d, unsigned int block_size,
d->disk->minors = BCACHE_MINORS;
d->disk->fops = ops;
d->disk->private_data = d;
q = d->disk->queue;
blk_queue_flag_set(QUEUE_FLAG_NONROT, d->disk->queue);
blk_queue_write_cache(q, true, true);
return 0;
out_bioset_exit:
@ -1423,8 +1416,8 @@ static int cached_dev_init(struct cached_dev *dc, unsigned int block_size)
}
if (bdev_io_opt(dc->bdev))
dc->partial_stripes_expensive =
q->limits.raid_partial_stripes_expensive;
dc->partial_stripes_expensive = !!(q->limits.features &
BLK_FEAT_RAID_PARTIAL_STRIPES_EXPENSIVE);
ret = bcache_device_init(&dc->disk, block_size,
bdev_nr_sectors(dc->bdev) - dc->sb.data_offset,

1
drivers/md/dm-cache-target.c
View File

@ -3403,7 +3403,6 @@ static void set_discard_limits(struct cache *cache, struct queue_limits *limits)
limits->max_hw_discard_sectors = origin_limits->max_hw_discard_sectors;
limits->discard_granularity = origin_limits->discard_granularity;
limits->discard_alignment = origin_limits->discard_alignment;
limits->discard_misaligned = origin_limits->discard_misaligned;
}
static void cache_io_hints(struct dm_target *ti, struct queue_limits *limits)

1
drivers/md/dm-clone-target.c
View File

@ -2059,7 +2059,6 @@ static void set_discard_limits(struct clone *clone, struct queue_limits *limits)
limits->max_hw_discard_sectors = dest_limits->max_hw_discard_sectors;
limits->discard_granularity = dest_limits->discard_granularity;
limits->discard_alignment = dest_limits->discard_alignment;
limits->discard_misaligned = dest_limits->discard_misaligned;
limits->max_discard_segments = dest_limits->max_discard_segments;
}

1
drivers/md/dm-core.h
View File

@ -206,7 +206,6 @@ struct dm_table {
bool integrity_supported:1;
bool singleton:1;
unsigned integrity_added:1;
/*
* Indicates the rw permissions for the new logical device. This

4
drivers/md/dm-crypt.c
View File

@ -1176,8 +1176,8 @@ static int crypt_integrity_ctr(struct crypt_config *cc, struct dm_target *ti)
struct blk_integrity *bi = blk_get_integrity(cc->dev->bdev->bd_disk);
struct mapped_device *md = dm_table_get_md(ti->table);
/* From now we require underlying device with our integrity profile */
if (!bi || strcasecmp(bi->profile->name, "DM-DIF-EXT-TAG")) {
/* We require an underlying device with non-PI metadata */
if (!bi || bi->csum_type != BLK_INTEGRITY_CSUM_NONE) {
ti->error = "Integrity profile not supported.";
return -EINVAL;
}

47
drivers/md/dm-integrity.c
View File

@ -350,25 +350,6 @@ static struct kmem_cache *journal_io_cache;
#define DEBUG_bytes(bytes, len, msg, ...) do { } while (0)
#endif
static void dm_integrity_prepare(struct request *rq)
{
}
static void dm_integrity_complete(struct request *rq, unsigned int nr_bytes)
{
}
/*
* DM Integrity profile, protection is performed layer above (dm-crypt)
*/
static const struct blk_integrity_profile dm_integrity_profile = {
.name = "DM-DIF-EXT-TAG",
.generate_fn = NULL,
.verify_fn = NULL,
.prepare_fn = dm_integrity_prepare,
.complete_fn = dm_integrity_complete,
};
static void dm_integrity_map_continue(struct dm_integrity_io *dio, bool from_map);
static void integrity_bio_wait(struct work_struct *w);
static void dm_integrity_dtr(struct dm_target *ti);
@ -3494,6 +3475,17 @@ static void dm_integrity_io_hints(struct dm_target *ti, struct queue_limits *lim
limits->dma_alignment = limits->logical_block_size - 1;
limits->discard_granularity = ic->sectors_per_block << SECTOR_SHIFT;
}
if (!ic->internal_hash) {
struct blk_integrity *bi = &limits->integrity;
memset(bi, 0, sizeof(*bi));
bi->tuple_size = ic->tag_size;
bi->tag_size = bi->tuple_size;
bi->interval_exp =
ic->sb->log2_sectors_per_block + SECTOR_SHIFT;
}
limits->max_integrity_segments = USHRT_MAX;
}
@ -3650,20 +3642,6 @@ try_smaller_buffer:
return 0;
}
static void dm_integrity_set(struct dm_target *ti, struct dm_integrity_c *ic)
{
struct gendisk *disk = dm_disk(dm_table_get_md(ti->table));
struct blk_integrity bi;
memset(&bi, 0, sizeof(bi));
bi.profile = &dm_integrity_profile;
bi.tuple_size = ic->tag_size;
bi.tag_size = bi.tuple_size;
bi.interval_exp = ic->sb->log2_sectors_per_block + SECTOR_SHIFT;
blk_integrity_register(disk, &bi);
}
static void dm_integrity_free_page_list(struct page_list *pl)
{
unsigned int i;
@ -4649,9 +4627,6 @@ try_smaller_buffer:
}
}
if (!ic->internal_hash)
dm_integrity_set(ti, ic);
ti->num_flush_bios = 1;
ti->flush_supported = true;
if (ic->discard)

2
drivers/md/dm-raid.c
View File

@ -3542,7 +3542,7 @@ static void raid_status(struct dm_target *ti, status_type_t type,
recovery = rs->md.recovery;
state = decipher_sync_action(mddev, recovery);
progress = rs_get_progress(rs, recovery, state, resync_max_sectors);
resync_mismatches = (mddev->last_sync_action && !strcasecmp(mddev->last_sync_action, "check")) ?
resync_mismatches = mddev->last_sync_action == ACTION_CHECK ?
atomic64_read(&mddev->resync_mismatches) : 0;
/* HM FIXME: do we want another state char for raid0? It shows 'D'/'A'/'-' now */

351
drivers/md/dm-table.c
View File

@ -425,6 +425,13 @@ static int dm_set_device_limits(struct dm_target *ti, struct dm_dev *dev,
q->limits.logical_block_size,
q->limits.alignment_offset,
(unsigned long long) start << SECTOR_SHIFT);
/*
* Only stack the integrity profile if the target doesn't have native
* integrity support.
*/
if (!dm_target_has_integrity(ti->type))
queue_limits_stack_integrity_bdev(limits, bdev);
return 0;
}
@ -572,6 +579,12 @@ int dm_split_args(int *argc, char ***argvp, char *input)
return 0;
}
static void dm_set_stacking_limits(struct queue_limits *limits)
{
blk_set_stacking_limits(limits);
limits->features |= BLK_FEAT_IO_STAT | BLK_FEAT_NOWAIT | BLK_FEAT_POLL;
}
/*
* Impose necessary and sufficient conditions on a devices's table such
* that any incoming bio which respects its logical_block_size can be
@ -610,7 +623,7 @@ static int validate_hardware_logical_block_alignment(struct dm_table *t,
for (i = 0; i < t->num_targets; i++) {
ti = dm_table_get_target(t, i);
blk_set_stacking_limits(&ti_limits);
dm_set_stacking_limits(&ti_limits);
/* combine all target devices' limits */
if (ti->type->iterate_devices)
@ -702,9 +715,6 @@ int dm_table_add_target(struct dm_table *t, const char *type,
t->immutable_target_type = ti->type;
}
if (dm_target_has_integrity(ti->type))
t->integrity_added = 1;
ti->table = t;
ti->begin = start;
ti->len = len;
@ -1014,14 +1024,13 @@ bool dm_table_request_based(struct dm_table *t)
return __table_type_request_based(dm_table_get_type(t));
}
static bool dm_table_supports_poll(struct dm_table *t);
static int dm_table_alloc_md_mempools(struct dm_table *t, struct mapped_device *md)
{
enum dm_queue_mode type = dm_table_get_type(t);
unsigned int per_io_data_size = 0, front_pad, io_front_pad;
unsigned int min_pool_size = 0, pool_size;
struct dm_md_mempools *pools;
unsigned int bioset_flags = 0;
if (unlikely(type == DM_TYPE_NONE)) {
DMERR("no table type is set, can't allocate mempools");
@ -1038,6 +1047,9 @@ static int dm_table_alloc_md_mempools(struct dm_table *t, struct mapped_device *
goto init_bs;
}
if (md->queue->limits.features & BLK_FEAT_POLL)
bioset_flags |= BIOSET_PERCPU_CACHE;
for (unsigned int i = 0; i < t->num_targets; i++) {
struct dm_target *ti = dm_table_get_target(t, i);
@ -1050,8 +1062,7 @@ static int dm_table_alloc_md_mempools(struct dm_table *t, struct mapped_device *
io_front_pad = roundup(per_io_data_size,
__alignof__(struct dm_io)) + DM_IO_BIO_OFFSET;
if (bioset_init(&pools->io_bs, pool_size, io_front_pad,
dm_table_supports_poll(t) ? BIOSET_PERCPU_CACHE : 0))
if (bioset_init(&pools->io_bs, pool_size, io_front_pad, bioset_flags))
goto out_free_pools;
if (t->integrity_supported &&
bioset_integrity_create(&pools->io_bs, pool_size))
@ -1119,99 +1130,6 @@ static int dm_table_build_index(struct dm_table *t)
return r;
}
static bool integrity_profile_exists(struct gendisk *disk)
{
return !!blk_get_integrity(disk);
}
/*
* Get a disk whose integrity profile reflects the table's profile.
* Returns NULL if integrity support was inconsistent or unavailable.
*/
static struct gendisk *dm_table_get_integrity_disk(struct dm_table *t)
{
struct list_head *devices = dm_table_get_devices(t);
struct dm_dev_internal *dd = NULL;
struct gendisk *prev_disk = NULL, *template_disk = NULL;
for (unsigned int i = 0; i < t->num_targets; i++) {
struct dm_target *ti = dm_table_get_target(t, i);
if (!dm_target_passes_integrity(ti->type))
goto no_integrity;
}
list_for_each_entry(dd, devices, list) {
template_disk = dd->dm_dev->bdev->bd_disk;
if (!integrity_profile_exists(template_disk))
goto no_integrity;
else if (prev_disk &&
blk_integrity_compare(prev_disk, template_disk) < 0)
goto no_integrity;
prev_disk = template_disk;
}
return template_disk;
no_integrity:
if (prev_disk)
DMWARN("%s: integrity not set: %s and %s profile mismatch",
dm_device_name(t->md),
prev_disk->disk_name,
template_disk->disk_name);
return NULL;
}
/*
* Register the mapped device for blk_integrity support if the
* underlying devices have an integrity profile. But all devices may
* not have matching profiles (checking all devices isn't reliable
* during table load because this table may use other DM device(s) which
* must be resumed before they will have an initialized integity
* profile). Consequently, stacked DM devices force a 2 stage integrity
* profile validation: First pass during table load, final pass during
* resume.
*/
static int dm_table_register_integrity(struct dm_table *t)
{
struct mapped_device *md = t->md;
struct gendisk *template_disk = NULL;
/* If target handles integrity itself do not register it here. */
if (t->integrity_added)
return 0;
template_disk = dm_table_get_integrity_disk(t);
if (!template_disk)
return 0;
if (!integrity_profile_exists(dm_disk(md))) {
t->integrity_supported = true;
/*
* Register integrity profile during table load; we can do
* this because the final profile must match during resume.
*/
blk_integrity_register(dm_disk(md),
blk_get_integrity(template_disk));
return 0;
}
/*
* If DM device already has an initialized integrity
* profile the new profile should not conflict.
*/
if (blk_integrity_compare(dm_disk(md), template_disk) < 0) {
DMERR("%s: conflict with existing integrity profile: %s profile mismatch",
dm_device_name(t->md),
template_disk->disk_name);
return 1;
}
/* Preserve existing integrity profile */
t->integrity_supported = true;
return 0;
}
#ifdef CONFIG_BLK_INLINE_ENCRYPTION
struct dm_crypto_profile {
@ -1423,12 +1341,6 @@ int dm_table_complete(struct dm_table *t)
return r;
}
r = dm_table_register_integrity(t);
if (r) {
DMERR("could not register integrity profile.");
return r;
}
r = dm_table_construct_crypto_profile(t);
if (r) {
DMERR("could not construct crypto profile.");
@ -1493,14 +1405,6 @@ struct dm_target *dm_table_find_target(struct dm_table *t, sector_t sector)
return &t->targets[(KEYS_PER_NODE * n) + k];
}
static int device_not_poll_capable(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
{
struct request_queue *q = bdev_get_queue(dev->bdev);
return !test_bit(QUEUE_FLAG_POLL, &q->queue_flags);
}
/*
* type->iterate_devices() should be called when the sanity check needs to
* iterate and check all underlying data devices. iterate_devices() will
@ -1548,19 +1452,6 @@ static int count_device(struct dm_target *ti, struct dm_dev *dev,
return 0;
}
static bool dm_table_supports_poll(struct dm_table *t)
{
for (unsigned int i = 0; i < t->num_targets; i++) {
struct dm_target *ti = dm_table_get_target(t, i);
if (!ti->type->iterate_devices ||
ti->type->iterate_devices(ti, device_not_poll_capable, NULL))
return false;
}
return true;
}
/*
* Check whether a table has no data devices attached using each
* target's iterate_devices method.
@ -1686,12 +1577,20 @@ int dm_calculate_queue_limits(struct dm_table *t,
unsigned int zone_sectors = 0;
bool zoned = false;
blk_set_stacking_limits(limits);
dm_set_stacking_limits(limits);
t->integrity_supported = true;
for (unsigned int i = 0; i < t->num_targets; i++) {
struct dm_target *ti = dm_table_get_target(t, i);
if (!dm_target_passes_integrity(ti->type))
t->integrity_supported = false;
}
for (unsigned int i = 0; i < t->num_targets; i++) {
struct dm_target *ti = dm_table_get_target(t, i);
blk_set_stacking_limits(&ti_limits);
dm_set_stacking_limits(&ti_limits);
if (!ti->type->iterate_devices) {
/* Set I/O hints portion of queue limits */
@ -1706,12 +1605,12 @@ int dm_calculate_queue_limits(struct dm_table *t,
ti->type->iterate_devices(ti, dm_set_device_limits,
&ti_limits);
if (!zoned && ti_limits.zoned) {
if (!zoned && (ti_limits.features & BLK_FEAT_ZONED)) {
/*
* After stacking all limits, validate all devices
* in table support this zoned model and zone sectors.
*/
zoned = ti_limits.zoned;
zoned = (ti_limits.features & BLK_FEAT_ZONED);
zone_sectors = ti_limits.chunk_sectors;
}
@ -1738,6 +1637,18 @@ combine_limits:
dm_device_name(t->md),
(unsigned long long) ti->begin,
(unsigned long long) ti->len);
if (t->integrity_supported ||
dm_target_has_integrity(ti->type)) {
if (!queue_limits_stack_integrity(limits, &ti_limits)) {
DMWARN("%s: adding target device (start sect %llu len %llu) "
"disabled integrity support due to incompatibility",
dm_device_name(t->md),
(unsigned long long) ti->begin,
(unsigned long long) ti->len);
t->integrity_supported = false;
}
}
}
/*
@ -1747,12 +1658,12 @@ combine_limits:
* zoned model on host-managed zoned block devices.
* BUT...
*/
if (limits->zoned) {
if (limits->features & BLK_FEAT_ZONED) {
/*
* ...IF the above limits stacking determined a zoned model
* validate that all of the table's devices conform to it.
*/
zoned = limits->zoned;
zoned = limits->features & BLK_FEAT_ZONED;
zone_sectors = limits->chunk_sectors;
}
if (validate_hardware_zoned(t, zoned, zone_sectors))
@ -1762,63 +1673,15 @@ combine_limits:
}
/*
* Verify that all devices have an integrity profile that matches the
* DM device's registered integrity profile. If the profiles don't
* match then unregister the DM device's integrity profile.
* Check if a target requires flush support even if none of the underlying
* devices need it (e.g. to persist target-specific metadata).
*/
static void dm_table_verify_integrity(struct dm_table *t)
static bool dm_table_supports_flush(struct dm_table *t)
{
struct gendisk *template_disk = NULL;
if (t->integrity_added)
return;
if (t->integrity_supported) {
/*
* Verify that the original integrity profile
* matches all the devices in this table.
*/
template_disk = dm_table_get_integrity_disk(t);
if (template_disk &&
blk_integrity_compare(dm_disk(t->md), template_disk) >= 0)
return;
}
if (integrity_profile_exists(dm_disk(t->md))) {
DMWARN("%s: unable to establish an integrity profile",
dm_device_name(t->md));
blk_integrity_unregister(dm_disk(t->md));
}
}
static int device_flush_capable(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
{
unsigned long flush = (unsigned long) data;
struct request_queue *q = bdev_get_queue(dev->bdev);
return (q->queue_flags & flush);
}
static bool dm_table_supports_flush(struct dm_table *t, unsigned long flush)
{
/*
* Require at least one underlying device to support flushes.
* t->devices includes internal dm devices such as mirror logs
* so we need to use iterate_devices here, which targets
* supporting flushes must provide.
*/
for (unsigned int i = 0; i < t->num_targets; i++) {
struct dm_target *ti = dm_table_get_target(t, i);
if (!ti->num_flush_bios)
continue;
if (ti->flush_supported)
return true;
if (ti->type->iterate_devices &&
ti->type->iterate_devices(ti, device_flush_capable, (void *) flush))
if (ti->num_flush_bios && ti->flush_supported)
return true;
}
@ -1839,20 +1702,6 @@ static int device_dax_write_cache_enabled(struct dm_target *ti,
return false;
}
static int device_is_rotational(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
{
return !bdev_nonrot(dev->bdev);
}
static int device_is_not_random(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
{
struct request_queue *q = bdev_get_queue(dev->bdev);
return !blk_queue_add_random(q);
}
static int device_not_write_zeroes_capable(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
{
@ -1877,12 +1726,6 @@ static bool dm_table_supports_write_zeroes(struct dm_table *t)
return true;
}
static int device_not_nowait_capable(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
{
return !bdev_nowait(dev->bdev);
}
static bool dm_table_supports_nowait(struct dm_table *t)
{
for (unsigned int i = 0; i < t->num_targets; i++) {
@ -1890,10 +1733,6 @@ static bool dm_table_supports_nowait(struct dm_table *t)
if (!dm_target_supports_nowait(ti->type))
return false;
if (!ti->type->iterate_devices ||
ti->type->iterate_devices(ti, device_not_nowait_capable, NULL))
return false;
}
return true;
@ -1950,29 +1789,25 @@ static bool dm_table_supports_secure_erase(struct dm_table *t)
return true;
}
static int device_requires_stable_pages(struct dm_target *ti,
struct dm_dev *dev, sector_t start,
sector_t len, void *data)
{
return bdev_stable_writes(dev->bdev);
}
int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
struct queue_limits *limits)
{
bool wc = false, fua = false;
int r;
if (dm_table_supports_nowait(t))
blk_queue_flag_set(QUEUE_FLAG_NOWAIT, q);
else
blk_queue_flag_clear(QUEUE_FLAG_NOWAIT, q);
if (!dm_table_supports_nowait(t))
limits->features &= ~BLK_FEAT_NOWAIT;
/*
* The current polling impementation does not support request based
* stacking.
*/
if (!__table_type_bio_based(t->type))
limits->features &= ~BLK_FEAT_POLL;
if (!dm_table_supports_discards(t)) {
limits->max_hw_discard_sectors = 0;
limits->discard_granularity = 0;
limits->discard_alignment = 0;
limits->discard_misaligned = 0;
}
if (!dm_table_supports_write_zeroes(t))
@ -1981,58 +1816,22 @@ int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
if (!dm_table_supports_secure_erase(t))
limits->max_secure_erase_sectors = 0;
if (dm_table_supports_flush(t, (1UL << QUEUE_FLAG_WC))) {
wc = true;
if (dm_table_supports_flush(t, (1UL << QUEUE_FLAG_FUA)))
fua = true;
}
blk_queue_write_cache(q, wc, fua);
if (dm_table_supports_flush(t))
limits->features |= BLK_FEAT_WRITE_CACHE | BLK_FEAT_FUA;
if (dm_table_supports_dax(t, device_not_dax_capable)) {
blk_queue_flag_set(QUEUE_FLAG_DAX, q);
limits->features |= BLK_FEAT_DAX;
if (dm_table_supports_dax(t, device_not_dax_synchronous_capable))
set_dax_synchronous(t->md->dax_dev);
} else
blk_queue_flag_clear(QUEUE_FLAG_DAX, q);
limits->features &= ~BLK_FEAT_DAX;
if (dm_table_any_dev_attr(t, device_dax_write_cache_enabled, NULL))
dax_write_cache(t->md->dax_dev, true);
/* Ensure that all underlying devices are non-rotational. */
if (dm_table_any_dev_attr(t, device_is_rotational, NULL))
blk_queue_flag_clear(QUEUE_FLAG_NONROT, q);
else
blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
dm_table_verify_integrity(t);
/*
* Some devices don't use blk_integrity but still want stable pages
* because they do their own checksumming.
* If any underlying device requires stable pages, a table must require
* them as well. Only targets that support iterate_devices are considered:
* don't want error, zero, etc to require stable pages.
*/
if (dm_table_any_dev_attr(t, device_requires_stable_pages, NULL))
blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, q);
else
blk_queue_flag_clear(QUEUE_FLAG_STABLE_WRITES, q);
/*
* Determine whether or not this queue's I/O timings contribute
* to the entropy pool, Only request-based targets use this.
* Clear QUEUE_FLAG_ADD_RANDOM if any underlying device does not
* have it set.
*/
if (blk_queue_add_random(q) &&
dm_table_any_dev_attr(t, device_is_not_random, NULL))
blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q);
/*
* For a zoned target, setup the zones related queue attributes
* and resources necessary for zone append emulation if necessary.
*/
if (IS_ENABLED(CONFIG_BLK_DEV_ZONED) && limits->zoned) {
/* For a zoned table, setup the zone related queue attributes. */
if (IS_ENABLED(CONFIG_BLK_DEV_ZONED) &&
(limits->features & BLK_FEAT_ZONED)) {
r = dm_set_zones_restrictions(t, q, limits);
if (r)
return r;
@ -2042,22 +1841,18 @@ int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
if (r)
return r;
dm_update_crypto_profile(q, t);
/*
* Check for request-based device is left to
* dm_mq_init_request_queue()->blk_mq_init_allocated_queue().
*
* For bio-based device, only set QUEUE_FLAG_POLL when all
* underlying devices supporting polling.
* Now that the limits are set, check the zones mapped by the table
* and setup the resources for zone append emulation if necessary.
*/
if (__table_type_bio_based(t->type)) {
if (dm_table_supports_poll(t))
blk_queue_flag_set(QUEUE_FLAG_POLL, q);
else
blk_queue_flag_clear(QUEUE_FLAG_POLL, q);
if (IS_ENABLED(CONFIG_BLK_DEV_ZONED) &&
(limits->features & BLK_FEAT_ZONED)) {
r = dm_revalidate_zones(t, q);
if (r)
return r;
}
dm_update_crypto_profile(q, t);
return 0;
}

254
drivers/md/dm-zone.c
View File

@ -13,8 +13,6 @@
#define DM_MSG_PREFIX "zone"
#define DM_ZONE_INVALID_WP_OFST UINT_MAX
/*
* For internal zone reports bypassing the top BIO submission path.
*/
@ -145,35 +143,28 @@ bool dm_is_zone_write(struct mapped_device *md, struct bio *bio)
}
}
/*
* Count conventional zones of a mapped zoned device. If the device
* only has conventional zones, do not expose it as zoned.
*/
static int dm_check_zoned_cb(struct blk_zone *zone, unsigned int idx,
void *data)
{
unsigned int *nr_conv_zones = data;
if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
(*nr_conv_zones)++;
return 0;
}
/*
* Revalidate the zones of a mapped device to initialize resource necessary
* for zone append emulation. Note that we cannot simply use the block layer
* blk_revalidate_disk_zones() function here as the mapped device is suspended
* (this is called from __bind() context).
*/
static int dm_revalidate_zones(struct mapped_device *md, struct dm_table *t)
int dm_revalidate_zones(struct dm_table *t, struct request_queue *q)
{
struct mapped_device *md = t->md;
struct gendisk *disk = md->disk;
int ret;
if (!get_capacity(disk))
return 0;
/* Revalidate only if something changed. */
if (!disk->nr_zones || disk->nr_zones != md->nr_zones)
if (!disk->nr_zones || disk->nr_zones != md->nr_zones) {
DMINFO("%s using %s zone append",
disk->disk_name,
queue_emulates_zone_append(q) ? "emulated" : "native");
md->nr_zones = 0;
}
if (md->nr_zones)
return 0;
@ -220,13 +211,129 @@ static bool dm_table_supports_zone_append(struct dm_table *t)
return true;
}
struct dm_device_zone_count {
sector_t start;
sector_t len;
unsigned int total_nr_seq_zones;
unsigned int target_nr_seq_zones;
};
/*
* Count the total number of and the number of mapped sequential zones of a
* target zoned device.
*/
static int dm_device_count_zones_cb(struct blk_zone *zone,
unsigned int idx, void *data)
{
struct dm_device_zone_count *zc = data;
if (zone->type != BLK_ZONE_TYPE_CONVENTIONAL) {
zc->total_nr_seq_zones++;
if (zone->start >= zc->start &&
zone->start < zc->start + zc->len)
zc->target_nr_seq_zones++;
}
return 0;
}
static int dm_device_count_zones(struct dm_dev *dev,
struct dm_device_zone_count *zc)
{
int ret;
ret = blkdev_report_zones(dev->bdev, 0, BLK_ALL_ZONES,
dm_device_count_zones_cb, zc);
if (ret < 0)
return ret;
if (!ret)
return -EIO;
return 0;
}
struct dm_zone_resource_limits {
unsigned int mapped_nr_seq_zones;
struct queue_limits *lim;
bool reliable_limits;
};
static int device_get_zone_resource_limits(struct dm_target *ti,
struct dm_dev *dev, sector_t start,
sector_t len, void *data)
{
struct dm_zone_resource_limits *zlim = data;
struct gendisk *disk = dev->bdev->bd_disk;
unsigned int max_open_zones, max_active_zones;
int ret;
struct dm_device_zone_count zc = {
.start = start,
.len = len,
};
/*
* If the target is not the whole device, the device zone resources may
* be shared between different targets. Check this by counting the
* number of mapped sequential zones: if this number is smaller than the
* total number of sequential zones of the target device, then resource
* sharing may happen and the zone limits will not be reliable.
*/
ret = dm_device_count_zones(dev, &zc);
if (ret) {
DMERR("Count %s zones failed %d", disk->disk_name, ret);
return ret;
}
/*
* If the target does not map any sequential zones, then we do not need
* any zone resource limits.
*/
if (!zc.target_nr_seq_zones)
return 0;
/*
* If the target does not map all sequential zones, the limits
* will not be reliable and we cannot use REQ_OP_ZONE_RESET_ALL.
*/
if (zc.target_nr_seq_zones < zc.total_nr_seq_zones) {
zlim->reliable_limits = false;
ti->zone_reset_all_supported = false;
}
/*
* If the target maps less sequential zones than the limit values, then
* we do not have limits for this target.
*/
max_active_zones = disk->queue->limits.max_active_zones;
if (max_active_zones >= zc.target_nr_seq_zones)
max_active_zones = 0;
zlim->lim->max_active_zones =
min_not_zero(max_active_zones, zlim->lim->max_active_zones);
max_open_zones = disk->queue->limits.max_open_zones;
if (max_open_zones >= zc.target_nr_seq_zones)
max_open_zones = 0;
zlim->lim->max_open_zones =
min_not_zero(max_open_zones, zlim->lim->max_open_zones);
/*
* Also count the total number of sequential zones for the mapped
* device so that when we are done inspecting all its targets, we are
* able to check if the mapped device actually has any sequential zones.
*/
zlim->mapped_nr_seq_zones += zc.target_nr_seq_zones;
return 0;
}
int dm_set_zones_restrictions(struct dm_table *t, struct request_queue *q,
struct queue_limits *lim)
{
struct mapped_device *md = t->md;
struct gendisk *disk = md->disk;
unsigned int nr_conv_zones = 0;
int ret;
struct dm_zone_resource_limits zlim = {
.reliable_limits = true,
.lim = lim,
};
/*
* Check if zone append is natively supported, and if not, set the
@ -240,46 +347,63 @@ int dm_set_zones_restrictions(struct dm_table *t, struct request_queue *q,
lim->max_zone_append_sectors = 0;
}
if (!get_capacity(md->disk))
return 0;
/*
* Count conventional zones to check that the mapped device will indeed
* have sequential write required zones.
* Determine the max open and max active zone limits for the mapped
* device by inspecting the zone resource limits and the zones mapped
* by each target.
*/
md->zone_revalidate_map = t;
ret = dm_blk_report_zones(disk, 0, UINT_MAX,
dm_check_zoned_cb, &nr_conv_zones);
md->zone_revalidate_map = NULL;
if (ret < 0) {
DMERR("Check zoned failed %d", ret);
return ret;
for (unsigned int i = 0; i < t->num_targets; i++) {
struct dm_target *ti = dm_table_get_target(t, i);
/*
* Assume that the target can accept REQ_OP_ZONE_RESET_ALL.
* device_get_zone_resource_limits() may adjust this if one of
* the device used by the target does not have all its
* sequential write required zones mapped.
*/
ti->zone_reset_all_supported = true;
if (!ti->type->iterate_devices ||
ti->type->iterate_devices(ti,
device_get_zone_resource_limits, &zlim)) {
DMERR("Could not determine %s zone resource limits",
disk->disk_name);
return -ENODEV;
}
}
/*
* If we only have conventional zones, expose the mapped device as
* a regular device.
* If we only have conventional zones mapped, expose the mapped device
+ as a regular device.
*/
if (nr_conv_zones >= ret) {
if (!zlim.mapped_nr_seq_zones) {
lim->max_open_zones = 0;
lim->max_active_zones = 0;
lim->zoned = false;
lim->max_zone_append_sectors = 0;
lim->zone_write_granularity = 0;
lim->chunk_sectors = 0;
lim->features &= ~BLK_FEAT_ZONED;
clear_bit(DMF_EMULATE_ZONE_APPEND, &md->flags);
md->nr_zones = 0;
disk->nr_zones = 0;
return 0;
}
if (!md->disk->nr_zones) {
DMINFO("%s using %s zone append",
md->disk->disk_name,
queue_emulates_zone_append(q) ? "emulated" : "native");
}
/*
* Warn once (when the capacity is not yet set) if the mapped device is
* partially using zone resources of the target devices as that leads to
* unreliable limits, i.e. if another mapped device uses the same
* underlying devices, we cannot enforce zone limits to guarantee that
* writing will not lead to errors. Note that we really should return
* an error for such case but there is no easy way to find out if
* another mapped device uses the same underlying zoned devices.
*/
if (!get_capacity(disk) && !zlim.reliable_limits)
DMWARN("%s zone resource limits may be unreliable",
disk->disk_name);
ret = dm_revalidate_zones(md, t);
if (ret < 0)
return ret;
if (!static_key_enabled(&zoned_enabled.key))
if (lim->features & BLK_FEAT_ZONED &&
!static_key_enabled(&zoned_enabled.key))
static_branch_enable(&zoned_enabled);
return 0;
}
@ -306,3 +430,39 @@ void dm_zone_endio(struct dm_io *io, struct bio *clone)
return;
}
static int dm_zone_need_reset_cb(struct blk_zone *zone, unsigned int idx,
void *data)
{
/*
* For an all-zones reset, ignore conventional, empty, read-only
* and offline zones.
*/
switch (zone->cond) {
case BLK_ZONE_COND_NOT_WP:
case BLK_ZONE_COND_EMPTY:
case BLK_ZONE_COND_READONLY:
case BLK_ZONE_COND_OFFLINE:
return 0;
default:
set_bit(idx, (unsigned long *)data);
return 0;
}
}
int dm_zone_get_reset_bitmap(struct mapped_device *md, struct dm_table *t,
sector_t sector, unsigned int nr_zones,
unsigned long *need_reset)
{
int ret;
ret = dm_blk_do_report_zones(md, t, sector, nr_zones,
dm_zone_need_reset_cb, need_reset);
if (ret != nr_zones) {
DMERR("Get %s zone reset bitmap failed\n",
md->disk->disk_name);
return -EIO;
}
return 0;
}

2
drivers/md/dm-zoned-target.c
View File

@ -1009,7 +1009,7 @@ static void dmz_io_hints(struct dm_target *ti, struct queue_limits *limits)
limits->max_sectors = chunk_sectors;
/* We are exposing a drive-managed zoned block device */
limits->zoned = false;
limits->features &= ~BLK_FEAT_ZONED;
}
/*

174
drivers/md/dm.c
View File

@ -1188,7 +1188,7 @@ static sector_t __max_io_len(struct dm_target *ti, sector_t sector,
return len;
return min_t(sector_t, len,
min(max_sectors ? : queue_max_sectors(ti->table->md->queue),
blk_chunk_sectors_left(target_offset, max_granularity)));
blk_boundary_sectors_left(target_offset, max_granularity)));
}
static inline sector_t max_io_len(struct dm_target *ti, sector_t sector)
@ -1598,20 +1598,19 @@ static void __send_abnormal_io(struct clone_info *ci, struct dm_target *ti,
static bool is_abnormal_io(struct bio *bio)
{
enum req_op op = bio_op(bio);
if (op != REQ_OP_READ && op != REQ_OP_WRITE && op != REQ_OP_FLUSH) {
switch (op) {
case REQ_OP_DISCARD:
case REQ_OP_SECURE_ERASE:
case REQ_OP_WRITE_ZEROES:
return true;
default:
break;
}
switch (bio_op(bio)) {
case REQ_OP_READ:
case REQ_OP_WRITE:
case REQ_OP_FLUSH:
return false;
case REQ_OP_DISCARD:
case REQ_OP_SECURE_ERASE:
case REQ_OP_WRITE_ZEROES:
case REQ_OP_ZONE_RESET_ALL:
return true;
default:
return false;
}
return false;
}
static blk_status_t __process_abnormal_io(struct clone_info *ci,
@ -1776,6 +1775,119 @@ static inline bool dm_zone_plug_bio(struct mapped_device *md, struct bio *bio)
{
return dm_emulate_zone_append(md) && blk_zone_plug_bio(bio, 0);
}
static blk_status_t __send_zone_reset_all_emulated(struct clone_info *ci,
struct dm_target *ti)
{
struct bio_list blist = BIO_EMPTY_LIST;
struct mapped_device *md = ci->io->md;
unsigned int zone_sectors = md->disk->queue->limits.chunk_sectors;
unsigned long *need_reset;
unsigned int i, nr_zones, nr_reset;
unsigned int num_bios = 0;
blk_status_t sts = BLK_STS_OK;
sector_t sector = ti->begin;
struct bio *clone;
int ret;
nr_zones = ti->len >> ilog2(zone_sectors);
need_reset = bitmap_zalloc(nr_zones, GFP_NOIO);
if (!need_reset)
return BLK_STS_RESOURCE;
ret = dm_zone_get_reset_bitmap(md, ci->map, ti->begin,
nr_zones, need_reset);
if (ret) {
sts = BLK_STS_IOERR;
goto free_bitmap;
}
/* If we have no zone to reset, we are done. */
nr_reset = bitmap_weight(need_reset, nr_zones);
if (!nr_reset)
goto free_bitmap;
atomic_add(nr_zones, &ci->io->io_count);
for (i = 0; i < nr_zones; i++) {
if (!test_bit(i, need_reset)) {
sector += zone_sectors;
continue;
}
if (bio_list_empty(&blist)) {
/* This may take a while, so be nice to others */
if (num_bios)
cond_resched();
/*
* We may need to reset thousands of zones, so let's
* not go crazy with the clone allocation.
*/
alloc_multiple_bios(&blist, ci, ti, min(nr_reset, 32),
NULL, GFP_NOIO);
}
/* Get a clone and change it to a regular reset operation. */
clone = bio_list_pop(&blist);
clone->bi_opf &= ~REQ_OP_MASK;
clone->bi_opf |= REQ_OP_ZONE_RESET | REQ_SYNC;
clone->bi_iter.bi_sector = sector;
clone->bi_iter.bi_size = 0;
__map_bio(clone);
sector += zone_sectors;
num_bios++;
nr_reset--;
}
WARN_ON_ONCE(!bio_list_empty(&blist));
atomic_sub(nr_zones - num_bios, &ci->io->io_count);
ci->sector_count = 0;
free_bitmap:
bitmap_free(need_reset);
return sts;
}
static void __send_zone_reset_all_native(struct clone_info *ci,
struct dm_target *ti)
{
unsigned int bios;
atomic_add(1, &ci->io->io_count);
bios = __send_duplicate_bios(ci, ti, 1, NULL, GFP_NOIO);
atomic_sub(1 - bios, &ci->io->io_count);
ci->sector_count = 0;
}
static blk_status_t __send_zone_reset_all(struct clone_info *ci)
{
struct dm_table *t = ci->map;
blk_status_t sts = BLK_STS_OK;
for (unsigned int i = 0; i < t->num_targets; i++) {
struct dm_target *ti = dm_table_get_target(t, i);
if (ti->zone_reset_all_supported) {
__send_zone_reset_all_native(ci, ti);
continue;
}
sts = __send_zone_reset_all_emulated(ci, ti);
if (sts != BLK_STS_OK)
break;
}
/* Release the reference that alloc_io() took for submission. */
atomic_sub(1, &ci->io->io_count);
return sts;
}
#else
static inline bool dm_zone_bio_needs_split(struct mapped_device *md,
struct bio *bio)
@ -1786,6 +1898,10 @@ static inline bool dm_zone_plug_bio(struct mapped_device *md, struct bio *bio)
{
return false;
}
static blk_status_t __send_zone_reset_all(struct clone_info *ci)
{
return BLK_STS_NOTSUPP;
}
#endif
/*
@ -1799,9 +1915,14 @@ static void dm_split_and_process_bio(struct mapped_device *md,
blk_status_t error = BLK_STS_OK;
bool is_abnormal, need_split;
need_split = is_abnormal = is_abnormal_io(bio);
if (static_branch_unlikely(&zoned_enabled))
need_split = is_abnormal || dm_zone_bio_needs_split(md, bio);
is_abnormal = is_abnormal_io(bio);
if (static_branch_unlikely(&zoned_enabled)) {
/* Special case REQ_OP_ZONE_RESET_ALL as it cannot be split. */
need_split = (bio_op(bio) != REQ_OP_ZONE_RESET_ALL) &&
(is_abnormal || dm_zone_bio_needs_split(md, bio));
} else {
need_split = is_abnormal;
}
if (unlikely(need_split)) {
/*
@ -1842,6 +1963,12 @@ static void dm_split_and_process_bio(struct mapped_device *md,
goto out;
}
if (static_branch_unlikely(&zoned_enabled) &&
(bio_op(bio) == REQ_OP_ZONE_RESET_ALL)) {
error = __send_zone_reset_all(&ci);
goto out;
}
error = __split_and_process_bio(&ci);
if (error || !ci.sector_count)
goto out;
@ -2386,22 +2513,15 @@ int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t)
struct table_device *td;
int r;
switch (type) {
case DM_TYPE_REQUEST_BASED:
WARN_ON_ONCE(type == DM_TYPE_NONE);
if (type == DM_TYPE_REQUEST_BASED) {
md->disk->fops = &dm_rq_blk_dops;
r = dm_mq_init_request_queue(md, t);
if (r) {
DMERR("Cannot initialize queue for request-based dm mapped device");
return r;
}
break;
case DM_TYPE_BIO_BASED:
case DM_TYPE_DAX_BIO_BASED:
blk_queue_flag_set(QUEUE_FLAG_IO_STAT, md->queue);
break;
case DM_TYPE_NONE:
WARN_ON_ONCE(true);
break;
}
r = dm_calculate_queue_limits(t, &limits);

4
drivers/md/dm.h
View File

@ -103,12 +103,16 @@ int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t);
*/
int dm_set_zones_restrictions(struct dm_table *t, struct request_queue *q,
struct queue_limits *lim);
int dm_revalidate_zones(struct dm_table *t, struct request_queue *q);
void dm_zone_endio(struct dm_io *io, struct bio *clone);
#ifdef CONFIG_BLK_DEV_ZONED
int dm_blk_report_zones(struct gendisk *disk, sector_t sector,
unsigned int nr_zones, report_zones_cb cb, void *data);
bool dm_is_zone_write(struct mapped_device *md, struct bio *bio);
int dm_zone_map_bio(struct dm_target_io *io);
int dm_zone_get_reset_bitmap(struct mapped_device *md, struct dm_table *t,
sector_t sector, unsigned int nr_zones,
unsigned long *need_reset);
#else
#define dm_blk_report_zones NULL
static inline bool dm_is_zone_write(struct mapped_device *md, struct bio *bio)

6
drivers/md/md-bitmap.c
View File

@ -227,6 +227,8 @@ static int __write_sb_page(struct md_rdev *rdev, struct bitmap *bitmap,
struct block_device *bdev;
struct mddev *mddev = bitmap->mddev;
struct bitmap_storage *store = &bitmap->storage;
unsigned int bitmap_limit = (bitmap->storage.file_pages - pg_index) <<
PAGE_SHIFT;
loff_t sboff, offset = mddev->bitmap_info.offset;
sector_t ps = pg_index * PAGE_SIZE / SECTOR_SIZE;
unsigned int size = PAGE_SIZE;
@ -269,11 +271,9 @@ static int __write_sb_page(struct md_rdev *rdev, struct bitmap *bitmap,
if (size == 0)
/* bitmap runs in to data */
return -EINVAL;
} else {
/* DATA METADATA BITMAP - no problems */
}
md_super_write(mddev, rdev, sboff + ps, (int) size, page);
md_super_write(mddev, rdev, sboff + ps, (int)min(size, bitmap_limit), page);
return 0;
}

2
drivers/md/md-cluster.c
View File

@ -1570,7 +1570,7 @@ out:
return err;
}
static struct md_cluster_operations cluster_ops = {
static const struct md_cluster_operations cluster_ops = {
.join = join,
.leave = leave,
.slot_number = slot_number,

640
drivers/md/md.c
View File

@ -69,13 +69,23 @@
#include "md-bitmap.h"
#include "md-cluster.h"
static const char *action_name[NR_SYNC_ACTIONS] = {
[ACTION_RESYNC] = "resync",
[ACTION_RECOVER] = "recover",
[ACTION_CHECK] = "check",
[ACTION_REPAIR] = "repair",
[ACTION_RESHAPE] = "reshape",
[ACTION_FROZEN] = "frozen",
[ACTION_IDLE] = "idle",
};
/* pers_list is a list of registered personalities protected by pers_lock. */
static LIST_HEAD(pers_list);
static DEFINE_SPINLOCK(pers_lock);
static const struct kobj_type md_ktype;
struct md_cluster_operations *md_cluster_ops;
const struct md_cluster_operations *md_cluster_ops;
EXPORT_SYMBOL(md_cluster_ops);
static struct module *md_cluster_mod;
@ -479,7 +489,6 @@ int mddev_suspend(struct mddev *mddev, bool interruptible)
*/
WRITE_ONCE(mddev->suspended, mddev->suspended + 1);
del_timer_sync(&mddev->safemode_timer);
/* restrict memory reclaim I/O during raid array is suspend */
mddev->noio_flag = memalloc_noio_save();
@ -550,13 +559,9 @@ static void md_end_flush(struct bio *bio)
rdev_dec_pending(rdev, mddev);
if (atomic_dec_and_test(&mddev->flush_pending)) {
/* The pair is percpu_ref_get() from md_flush_request() */
percpu_ref_put(&mddev->active_io);
if (atomic_dec_and_test(&mddev->flush_pending))
/* The pre-request flush has finished */
queue_work(md_wq, &mddev->flush_work);
}
}
static void md_submit_flush_data(struct work_struct *ws);
@ -587,12 +592,8 @@ static void submit_flushes(struct work_struct *ws)
rcu_read_lock();
}
rcu_read_unlock();
if (atomic_dec_and_test(&mddev->flush_pending)) {
/* The pair is percpu_ref_get() from md_flush_request() */
percpu_ref_put(&mddev->active_io);
if (atomic_dec_and_test(&mddev->flush_pending))
queue_work(md_wq, &mddev->flush_work);
}
}
static void md_submit_flush_data(struct work_struct *ws)
@ -617,8 +618,20 @@ static void md_submit_flush_data(struct work_struct *ws)
bio_endio(bio);
} else {
bio->bi_opf &= ~REQ_PREFLUSH;
md_handle_request(mddev, bio);
/*
* make_requst() will never return error here, it only
* returns error in raid5_make_request() by dm-raid.
* Since dm always splits data and flush operation into
* two separate io, io size of flush submitted by dm
* always is 0, make_request() will not be called here.
*/
if (WARN_ON_ONCE(!mddev->pers->make_request(mddev, bio)))
bio_io_error(bio);
}
/* The pair is percpu_ref_get() from md_flush_request() */
percpu_ref_put(&mddev->active_io);
}
/*
@ -654,24 +667,22 @@ bool md_flush_request(struct mddev *mddev, struct bio *bio)
WARN_ON(percpu_ref_is_zero(&mddev->active_io));
percpu_ref_get(&mddev->active_io);
mddev->flush_bio = bio;
bio = NULL;
}
spin_unlock_irq(&mddev->lock);
if (!bio) {
spin_unlock_irq(&mddev->lock);
INIT_WORK(&mddev->flush_work, submit_flushes);
queue_work(md_wq, &mddev->flush_work);
} else {
/* flush was performed for some other bio while we waited. */
if (bio->bi_iter.bi_size == 0)
/* an empty barrier - all done */
bio_endio(bio);
else {
bio->bi_opf &= ~REQ_PREFLUSH;
return false;
}
return true;
}
return true;
/* flush was performed for some other bio while we waited. */
spin_unlock_irq(&mddev->lock);
if (bio->bi_iter.bi_size == 0) {
/* pure flush without data - all done */
bio_endio(bio);
return true;
}
bio->bi_opf &= ~REQ_PREFLUSH;
return false;
}
EXPORT_SYMBOL(md_flush_request);
@ -742,7 +753,6 @@ int mddev_init(struct mddev *mddev)
mutex_init(&mddev->open_mutex);
mutex_init(&mddev->reconfig_mutex);
mutex_init(&mddev->sync_mutex);
mutex_init(&mddev->suspend_mutex);
mutex_init(&mddev->bitmap_info.mutex);
INIT_LIST_HEAD(&mddev->disks);
@ -758,7 +768,7 @@ int mddev_init(struct mddev *mddev)
init_waitqueue_head(&mddev->recovery_wait);
mddev->reshape_position = MaxSector;
mddev->reshape_backwards = 0;
mddev->last_sync_action = "none";
mddev->last_sync_action = ACTION_IDLE;
mddev->resync_min = 0;
mddev->resync_max = MaxSector;
mddev->level = LEVEL_NONE;
@ -2410,36 +2420,10 @@ static LIST_HEAD(pending_raid_disks);
*/
int md_integrity_register(struct mddev *mddev)
{
struct md_rdev *rdev, *reference = NULL;
if (list_empty(&mddev->disks))
return 0; /* nothing to do */
if (mddev_is_dm(mddev) || blk_get_integrity(mddev->gendisk))
return 0; /* shouldn't register, or already is */
rdev_for_each(rdev, mddev) {
/* skip spares and non-functional disks */
if (test_bit(Faulty, &rdev->flags))
continue;
if (rdev->raid_disk < 0)
continue;
if (!reference) {
/* Use the first rdev as the reference */
reference = rdev;
continue;
}
/* does this rdev's profile match the reference profile? */
if (blk_integrity_compare(reference->bdev->bd_disk,
rdev->bdev->bd_disk) < 0)
return -EINVAL;
}
if (!reference || !bdev_get_integrity(reference->bdev))
return 0;
/*
* All component devices are integrity capable and have matching
* profiles, register the common profile for the md device.
*/
blk_integrity_register(mddev->gendisk,
bdev_get_integrity(reference->bdev));
if (mddev_is_dm(mddev) || !blk_get_integrity(mddev->gendisk))
return 0; /* shouldn't register */
pr_debug("md: data integrity enabled on %s\n", mdname(mddev));
if (bioset_integrity_create(&mddev->bio_set, BIO_POOL_SIZE) ||
@ -2459,32 +2443,6 @@ int md_integrity_register(struct mddev *mddev)
}
EXPORT_SYMBOL(md_integrity_register);
/*
* Attempt to add an rdev, but only if it is consistent with the current
* integrity profile
*/
int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev)
{
struct blk_integrity *bi_mddev;
if (mddev_is_dm(mddev))
return 0;
bi_mddev = blk_get_integrity(mddev->gendisk);
if (!bi_mddev) /* nothing to do */
return 0;
if (blk_integrity_compare(mddev->gendisk, rdev->bdev->bd_disk) != 0) {
pr_err("%s: incompatible integrity profile for %pg\n",
mdname(mddev), rdev->bdev);
return -ENXIO;
}
return 0;
}
EXPORT_SYMBOL(md_integrity_add_rdev);
static bool rdev_read_only(struct md_rdev *rdev)
{
return bdev_read_only(rdev->bdev) ||
@ -4867,30 +4825,81 @@ out_unlock:
static struct md_sysfs_entry md_metadata =
__ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store);
enum sync_action md_sync_action(struct mddev *mddev)
{
unsigned long recovery = mddev->recovery;
/*
* frozen has the highest priority, means running sync_thread will be
* stopped immediately, and no new sync_thread can start.
*/
if (test_bit(MD_RECOVERY_FROZEN, &recovery))
return ACTION_FROZEN;
/*
* read-only array can't register sync_thread, and it can only
* add/remove spares.
*/
if (!md_is_rdwr(mddev))
return ACTION_IDLE;
/*
* idle means no sync_thread is running, and no new sync_thread is
* requested.
*/
if (!test_bit(MD_RECOVERY_RUNNING, &recovery) &&
!test_bit(MD_RECOVERY_NEEDED, &recovery))
return ACTION_IDLE;
if (test_bit(MD_RECOVERY_RESHAPE, &recovery) ||
mddev->reshape_position != MaxSector)
return ACTION_RESHAPE;
if (test_bit(MD_RECOVERY_RECOVER, &recovery))
return ACTION_RECOVER;
if (test_bit(MD_RECOVERY_SYNC, &recovery)) {
/*
* MD_RECOVERY_CHECK must be paired with
* MD_RECOVERY_REQUESTED.
*/
if (test_bit(MD_RECOVERY_CHECK, &recovery))
return ACTION_CHECK;
if (test_bit(MD_RECOVERY_REQUESTED, &recovery))
return ACTION_REPAIR;
return ACTION_RESYNC;
}
/*
* MD_RECOVERY_NEEDED or MD_RECOVERY_RUNNING is set, however, no
* sync_action is specified.
*/
return ACTION_IDLE;
}
enum sync_action md_sync_action_by_name(const char *page)
{
enum sync_action action;
for (action = 0; action < NR_SYNC_ACTIONS; ++action) {
if (cmd_match(page, action_name[action]))
return action;
}
return NR_SYNC_ACTIONS;
}
const char *md_sync_action_name(enum sync_action action)
{
return action_name[action];
}
static ssize_t
action_show(struct mddev *mddev, char *page)
{
char *type = "idle";
unsigned long recovery = mddev->recovery;
if (test_bit(MD_RECOVERY_FROZEN, &recovery))
type = "frozen";
else if (test_bit(MD_RECOVERY_RUNNING, &recovery) ||
(md_is_rdwr(mddev) && test_bit(MD_RECOVERY_NEEDED, &recovery))) {
if (test_bit(MD_RECOVERY_RESHAPE, &recovery))
type = "reshape";
else if (test_bit(MD_RECOVERY_SYNC, &recovery)) {
if (!test_bit(MD_RECOVERY_REQUESTED, &recovery))
type = "resync";
else if (test_bit(MD_RECOVERY_CHECK, &recovery))
type = "check";
else
type = "repair";
} else if (test_bit(MD_RECOVERY_RECOVER, &recovery))
type = "recover";
else if (mddev->reshape_position != MaxSector)
type = "reshape";
}
return sprintf(page, "%s\n", type);
enum sync_action action = md_sync_action(mddev);
return sprintf(page, "%s\n", md_sync_action_name(action));
}
/**
@ -4899,15 +4908,10 @@ action_show(struct mddev *mddev, char *page)
* @locked: if set, reconfig_mutex will still be held after this function
* return; if not set, reconfig_mutex will be released after this
* function return.
* @check_seq: if set, only wait for curent running sync_thread to stop, noted
* that new sync_thread can still start.
*/
static void stop_sync_thread(struct mddev *mddev, bool locked, bool check_seq)
static void stop_sync_thread(struct mddev *mddev, bool locked)
{
int sync_seq;
if (check_seq)
sync_seq = atomic_read(&mddev->sync_seq);
int sync_seq = atomic_read(&mddev->sync_seq);
if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) {
if (!locked)
@ -4928,7 +4932,8 @@ static void stop_sync_thread(struct mddev *mddev, bool locked, bool check_seq)
wait_event(resync_wait,
!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) ||
(check_seq && sync_seq != atomic_read(&mddev->sync_seq)));
(!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery) &&
sync_seq != atomic_read(&mddev->sync_seq)));
if (locked)
mddev_lock_nointr(mddev);
@ -4939,7 +4944,7 @@ void md_idle_sync_thread(struct mddev *mddev)
lockdep_assert_held(&mddev->reconfig_mutex);
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
stop_sync_thread(mddev, true, true);
stop_sync_thread(mddev, true);
}
EXPORT_SYMBOL_GPL(md_idle_sync_thread);
@ -4948,7 +4953,7 @@ void md_frozen_sync_thread(struct mddev *mddev)
lockdep_assert_held(&mddev->reconfig_mutex);
set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
stop_sync_thread(mddev, true, false);
stop_sync_thread(mddev, true);
}
EXPORT_SYMBOL_GPL(md_frozen_sync_thread);
@ -4963,100 +4968,127 @@ void md_unfrozen_sync_thread(struct mddev *mddev)
}
EXPORT_SYMBOL_GPL(md_unfrozen_sync_thread);
static void idle_sync_thread(struct mddev *mddev)
static int mddev_start_reshape(struct mddev *mddev)
{
mutex_lock(&mddev->sync_mutex);
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
int ret;
if (mddev_lock(mddev)) {
mutex_unlock(&mddev->sync_mutex);
return;
if (mddev->pers->start_reshape == NULL)
return -EINVAL;
if (mddev->reshape_position == MaxSector ||
mddev->pers->check_reshape == NULL ||
mddev->pers->check_reshape(mddev)) {
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
ret = mddev->pers->start_reshape(mddev);
if (ret)
return ret;
} else {
/*
* If reshape is still in progress, and md_check_recovery() can
* continue to reshape, don't restart reshape because data can
* be corrupted for raid456.
*/
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
}
stop_sync_thread(mddev, false, true);
mutex_unlock(&mddev->sync_mutex);
}
static void frozen_sync_thread(struct mddev *mddev)
{
mutex_lock(&mddev->sync_mutex);
set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
if (mddev_lock(mddev)) {
mutex_unlock(&mddev->sync_mutex);
return;
}
stop_sync_thread(mddev, false, false);
mutex_unlock(&mddev->sync_mutex);
sysfs_notify_dirent_safe(mddev->sysfs_degraded);
return 0;
}
static ssize_t
action_store(struct mddev *mddev, const char *page, size_t len)
{
int ret;
enum sync_action action;
if (!mddev->pers || !mddev->pers->sync_request)
return -EINVAL;
retry:
if (work_busy(&mddev->sync_work))
flush_work(&mddev->sync_work);
if (cmd_match(page, "idle"))
idle_sync_thread(mddev);
else if (cmd_match(page, "frozen"))
frozen_sync_thread(mddev);
else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery))
return -EBUSY;
else if (cmd_match(page, "resync"))
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
else if (cmd_match(page, "recover")) {
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
set_bit(MD_RECOVERY_RECOVER, &mddev->recovery);
} else if (cmd_match(page, "reshape")) {
int err;
if (mddev->pers->start_reshape == NULL)
return -EINVAL;
err = mddev_lock(mddev);
if (!err) {
if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) {
err = -EBUSY;
} else if (mddev->reshape_position == MaxSector ||
mddev->pers->check_reshape == NULL ||
mddev->pers->check_reshape(mddev)) {
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
err = mddev->pers->start_reshape(mddev);
} else {
/*
* If reshape is still in progress, and
* md_check_recovery() can continue to reshape,
* don't restart reshape because data can be
* corrupted for raid456.
*/
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
}
mddev_unlock(mddev);
}
if (err)
return err;
sysfs_notify_dirent_safe(mddev->sysfs_degraded);
} else {
if (cmd_match(page, "check"))
set_bit(MD_RECOVERY_CHECK, &mddev->recovery);
else if (!cmd_match(page, "repair"))
return -EINVAL;
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery);
set_bit(MD_RECOVERY_SYNC, &mddev->recovery);
ret = mddev_lock(mddev);
if (ret)
return ret;
if (work_busy(&mddev->sync_work)) {
mddev_unlock(mddev);
goto retry;
}
action = md_sync_action_by_name(page);
/* TODO: mdadm rely on "idle" to start sync_thread. */
if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) {
switch (action) {
case ACTION_FROZEN:
md_frozen_sync_thread(mddev);
ret = len;
goto out;
case ACTION_IDLE:
md_idle_sync_thread(mddev);
break;
case ACTION_RESHAPE:
case ACTION_RECOVER:
case ACTION_CHECK:
case ACTION_REPAIR:
case ACTION_RESYNC:
ret = -EBUSY;
goto out;
default:
ret = -EINVAL;
goto out;
}
} else {
switch (action) {
case ACTION_FROZEN:
set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
ret = len;
goto out;
case ACTION_RESHAPE:
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
ret = mddev_start_reshape(mddev);
if (ret)
goto out;
break;
case ACTION_RECOVER:
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
set_bit(MD_RECOVERY_RECOVER, &mddev->recovery);
break;
case ACTION_CHECK:
set_bit(MD_RECOVERY_CHECK, &mddev->recovery);
fallthrough;
case ACTION_REPAIR:
set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery);
set_bit(MD_RECOVERY_SYNC, &mddev->recovery);
fallthrough;
case ACTION_RESYNC:
case ACTION_IDLE:
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
break;
default:
ret = -EINVAL;
goto out;
}
}
if (mddev->ro == MD_AUTO_READ) {
/* A write to sync_action is enough to justify
* canceling read-auto mode
*/
flush_work(&mddev->sync_work);
mddev->ro = MD_RDWR;
md_wakeup_thread(mddev->sync_thread);
}
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
md_wakeup_thread(mddev->thread);
sysfs_notify_dirent_safe(mddev->sysfs_action);
return len;
ret = len;
out:
mddev_unlock(mddev);
return ret;
}
static struct md_sysfs_entry md_scan_mode =
@ -5065,7 +5097,8 @@ __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store);
static ssize_t
last_sync_action_show(struct mddev *mddev, char *page)
{
return sprintf(page, "%s\n", mddev->last_sync_action);
return sprintf(page, "%s\n",
md_sync_action_name(mddev->last_sync_action));
}
static struct md_sysfs_entry md_last_scan_mode = __ATTR_RO(last_sync_action);
@ -5755,14 +5788,20 @@ static const struct kobj_type md_ktype = {
int mdp_major = 0;
/* stack the limit for all rdevs into lim */
void mddev_stack_rdev_limits(struct mddev *mddev, struct queue_limits *lim)
int mddev_stack_rdev_limits(struct mddev *mddev, struct queue_limits *lim,
unsigned int flags)
{
struct md_rdev *rdev;
rdev_for_each(rdev, mddev) {
queue_limits_stack_bdev(lim, rdev->bdev, rdev->data_offset,
mddev->gendisk->disk_name);
if ((flags & MDDEV_STACK_INTEGRITY) &&
!queue_limits_stack_integrity_bdev(lim, rdev->bdev))
return -EINVAL;
}
return 0;
}
EXPORT_SYMBOL_GPL(mddev_stack_rdev_limits);
@ -5777,6 +5816,14 @@ int mddev_stack_new_rdev(struct mddev *mddev, struct md_rdev *rdev)
lim = queue_limits_start_update(mddev->gendisk->queue);
queue_limits_stack_bdev(&lim, rdev->bdev, rdev->data_offset,
mddev->gendisk->disk_name);
if (!queue_limits_stack_integrity_bdev(&lim, rdev->bdev)) {
pr_err("%s: incompatible integrity profile for %pg\n",
mdname(mddev), rdev->bdev);
queue_limits_cancel_update(mddev->gendisk->queue);
return -ENXIO;
}
return queue_limits_commit_update(mddev->gendisk->queue, &lim);
}
EXPORT_SYMBOL_GPL(mddev_stack_new_rdev);
@ -5806,6 +5853,14 @@ static void mddev_delayed_delete(struct work_struct *ws)
kobject_put(&mddev->kobj);
}
void md_init_stacking_limits(struct queue_limits *lim)
{
blk_set_stacking_limits(lim);
lim->features = BLK_FEAT_WRITE_CACHE | BLK_FEAT_FUA |
BLK_FEAT_IO_STAT | BLK_FEAT_NOWAIT;
}
EXPORT_SYMBOL_GPL(md_init_stacking_limits);
struct mddev *md_alloc(dev_t dev, char *name)
{
/*
@ -5823,7 +5878,7 @@ struct mddev *md_alloc(dev_t dev, char *name)
int partitioned;
int shift;
int unit;
int error ;
int error;
/*
* Wait for any previous instance of this device to be completely
@ -5881,7 +5936,6 @@ struct mddev *md_alloc(dev_t dev, char *name)
disk->fops = &md_fops;
disk->private_data = mddev;
blk_queue_write_cache(disk->queue, true, true);
disk->events |= DISK_EVENT_MEDIA_CHANGE;
mddev->gendisk = disk;
error = add_disk(disk);
@ -6185,28 +6239,6 @@ int md_run(struct mddev *mddev)
}
}
if (!mddev_is_dm(mddev)) {
struct request_queue *q = mddev->gendisk->queue;
bool nonrot = true;
rdev_for_each(rdev, mddev) {
if (rdev->raid_disk >= 0 && !bdev_nonrot(rdev->bdev)) {
nonrot = false;
break;
}
}
if (mddev->degraded)
nonrot = false;
if (nonrot)
blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
else
blk_queue_flag_clear(QUEUE_FLAG_NONROT, q);
blk_queue_flag_set(QUEUE_FLAG_IO_STAT, q);
/* Set the NOWAIT flags if all underlying devices support it */
if (nowait)
blk_queue_flag_set(QUEUE_FLAG_NOWAIT, q);
}
if (pers->sync_request) {
if (mddev->kobj.sd &&
sysfs_create_group(&mddev->kobj, &md_redundancy_group))
@ -6437,7 +6469,7 @@ void md_stop_writes(struct mddev *mddev)
{
mddev_lock_nointr(mddev);
set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
stop_sync_thread(mddev, true, false);
stop_sync_thread(mddev, true);
__md_stop_writes(mddev);
mddev_unlock(mddev);
}
@ -6505,7 +6537,7 @@ static int md_set_readonly(struct mddev *mddev)
set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
}
stop_sync_thread(mddev, false, false);
stop_sync_thread(mddev, false);
wait_event(mddev->sb_wait,
!test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags));
mddev_lock_nointr(mddev);
@ -6551,7 +6583,7 @@ static int do_md_stop(struct mddev *mddev, int mode)
set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
}
stop_sync_thread(mddev, true, false);
stop_sync_thread(mddev, true);
if (mddev->sysfs_active ||
test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) {
@ -7165,15 +7197,6 @@ static int hot_add_disk(struct mddev *mddev, dev_t dev)
set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
if (!mddev->thread)
md_update_sb(mddev, 1);
/*
* If the new disk does not support REQ_NOWAIT,
* disable on the whole MD.
*/
if (!bdev_nowait(rdev->bdev)) {
pr_info("%s: Disabling nowait because %pg does not support nowait\n",
mdname(mddev), rdev->bdev);
blk_queue_flag_clear(QUEUE_FLAG_NOWAIT, mddev->gendisk->queue);
}
/*
* Kick recovery, maybe this spare has to be added to the
* array immediately.
@ -7742,12 +7765,6 @@ static int md_ioctl(struct block_device *bdev, blk_mode_t mode,
return get_bitmap_file(mddev, argp);
}
if (cmd == HOT_REMOVE_DISK)
/* need to ensure recovery thread has run */
wait_event_interruptible_timeout(mddev->sb_wait,
!test_bit(MD_RECOVERY_NEEDED,
&mddev->recovery),
msecs_to_jiffies(5000));
if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) {
/* Need to flush page cache, and ensure no-one else opens
* and writes
@ -8520,7 +8537,7 @@ int unregister_md_personality(struct md_personality *p)
}
EXPORT_SYMBOL(unregister_md_personality);
int register_md_cluster_operations(struct md_cluster_operations *ops,
int register_md_cluster_operations(const struct md_cluster_operations *ops,
struct module *module)
{
int ret = 0;
@ -8641,12 +8658,12 @@ EXPORT_SYMBOL(md_done_sync);
* A return value of 'false' means that the write wasn't recorded
* and cannot proceed as the array is being suspend.
*/
bool md_write_start(struct mddev *mddev, struct bio *bi)
void md_write_start(struct mddev *mddev, struct bio *bi)
{
int did_change = 0;
if (bio_data_dir(bi) != WRITE)
return true;
return;
BUG_ON(mddev->ro == MD_RDONLY);
if (mddev->ro == MD_AUTO_READ) {
@ -8679,15 +8696,9 @@ bool md_write_start(struct mddev *mddev, struct bio *bi)
if (did_change)
sysfs_notify_dirent_safe(mddev->sysfs_state);
if (!mddev->has_superblocks)
return true;
return;
wait_event(mddev->sb_wait,
!test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) ||
is_md_suspended(mddev));
if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) {
percpu_ref_put(&mddev->writes_pending);
return false;
}
return true;
!test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags));
}
EXPORT_SYMBOL(md_write_start);
@ -8835,6 +8846,77 @@ void md_allow_write(struct mddev *mddev)
}
EXPORT_SYMBOL_GPL(md_allow_write);
static sector_t md_sync_max_sectors(struct mddev *mddev,
enum sync_action action)
{
switch (action) {
case ACTION_RESYNC:
case ACTION_CHECK:
case ACTION_REPAIR:
atomic64_set(&mddev->resync_mismatches, 0);
fallthrough;
case ACTION_RESHAPE:
return mddev->resync_max_sectors;
case ACTION_RECOVER:
return mddev->dev_sectors;
default:
return 0;
}
}
static sector_t md_sync_position(struct mddev *mddev, enum sync_action action)
{
sector_t start = 0;
struct md_rdev *rdev;
switch (action) {
case ACTION_CHECK:
case ACTION_REPAIR:
return mddev->resync_min;
case ACTION_RESYNC:
if (!mddev->bitmap)
return mddev->recovery_cp;
return 0;
case ACTION_RESHAPE:
/*
* If the original node aborts reshaping then we continue the
* reshaping, so set again to avoid restart reshape from the
* first beginning
*/
if (mddev_is_clustered(mddev) &&
mddev->reshape_position != MaxSector)
return mddev->reshape_position;
return 0;
case ACTION_RECOVER:
start = MaxSector;
rcu_read_lock();
rdev_for_each_rcu(rdev, mddev)
if (rdev->raid_disk >= 0 &&
!test_bit(Journal, &rdev->flags) &&
!test_bit(Faulty, &rdev->flags) &&
!test_bit(In_sync, &rdev->flags) &&
rdev->recovery_offset < start)
start = rdev->recovery_offset;
rcu_read_unlock();
/* If there is a bitmap, we need to make sure all
* writes that started before we added a spare
* complete before we start doing a recovery.
* Otherwise the write might complete and (via
* bitmap_endwrite) set a bit in the bitmap after the
* recovery has checked that bit and skipped that
* region.
*/
if (mddev->bitmap) {
mddev->pers->quiesce(mddev, 1);
mddev->pers->quiesce(mddev, 0);
}
return start;
default:
return MaxSector;
}
}
#define SYNC_MARKS 10
#define SYNC_MARK_STEP (3*HZ)
#define UPDATE_FREQUENCY (5*60*HZ)
@ -8851,7 +8933,8 @@ void md_do_sync(struct md_thread *thread)
sector_t last_check;
int skipped = 0;
struct md_rdev *rdev;
char *desc, *action = NULL;
enum sync_action action;
const char *desc;
struct blk_plug plug;
int ret;
@ -8882,21 +8965,9 @@ void md_do_sync(struct md_thread *thread)
goto skip;
}
if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) {
if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) {
desc = "data-check";
action = "check";
} else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) {
desc = "requested-resync";
action = "repair";
} else
desc = "resync";
} else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery))
desc = "reshape";
else
desc = "recovery";
mddev->last_sync_action = action ?: desc;
action = md_sync_action(mddev);
desc = md_sync_action_name(action);
mddev->last_sync_action = action;
/*
* Before starting a resync we must have set curr_resync to
@ -8964,56 +9035,8 @@ void md_do_sync(struct md_thread *thread)
spin_unlock(&all_mddevs_lock);
} while (mddev->curr_resync < MD_RESYNC_DELAYED);
j = 0;
if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) {
/* resync follows the size requested by the personality,
* which defaults to physical size, but can be virtual size
*/
max_sectors = mddev->resync_max_sectors;
atomic64_set(&mddev->resync_mismatches, 0);
/* we don't use the checkpoint if there's a bitmap */
if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery))
j = mddev->resync_min;
else if (!mddev->bitmap)
j = mddev->recovery_cp;
} else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) {
max_sectors = mddev->resync_max_sectors;
/*
* If the original node aborts reshaping then we continue the
* reshaping, so set j again to avoid restart reshape from the
* first beginning
*/
if (mddev_is_clustered(mddev) &&
mddev->reshape_position != MaxSector)
j = mddev->reshape_position;
} else {
/* recovery follows the physical size of devices */
max_sectors = mddev->dev_sectors;
j = MaxSector;
rcu_read_lock();
rdev_for_each_rcu(rdev, mddev)
if (rdev->raid_disk >= 0 &&
!test_bit(Journal, &rdev->flags) &&
!test_bit(Faulty, &rdev->flags) &&
!test_bit(In_sync, &rdev->flags) &&
rdev->recovery_offset < j)
j = rdev->recovery_offset;
rcu_read_unlock();
/* If there is a bitmap, we need to make sure all
* writes that started before we added a spare
* complete before we start doing a recovery.
* Otherwise the write might complete and (via
* bitmap_endwrite) set a bit in the bitmap after the
* recovery has checked that bit and skipped that
* region.
*/
if (mddev->bitmap) {
mddev->pers->quiesce(mddev, 1);
mddev->pers->quiesce(mddev, 0);
}
}
max_sectors = md_sync_max_sectors(mddev, action);
j = md_sync_position(mddev, action);
pr_info("md: %s of RAID array %s\n", desc, mdname(mddev));
pr_debug("md: minimum _guaranteed_ speed: %d KB/sec/disk.\n", speed_min(mddev));
@ -9095,7 +9118,8 @@ void md_do_sync(struct md_thread *thread)
if (test_bit(MD_RECOVERY_INTR, &mddev->recovery))
break;
sectors = mddev->pers->sync_request(mddev, j, &skipped);
sectors = mddev->pers->sync_request(mddev, j, max_sectors,
&skipped);
if (sectors == 0) {
set_bit(MD_RECOVERY_INTR, &mddev->recovery);
break;
@ -9185,7 +9209,7 @@ void md_do_sync(struct md_thread *thread)
mddev->curr_resync_completed = mddev->curr_resync;
sysfs_notify_dirent_safe(mddev->sysfs_completed);
}
mddev->pers->sync_request(mddev, max_sectors, &skipped);
mddev->pers->sync_request(mddev, max_sectors, max_sectors, &skipped);
if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) &&
mddev->curr_resync > MD_RESYNC_ACTIVE) {

136
drivers/md/md.h
View File

@ -34,6 +34,61 @@
*/
#define MD_FAILFAST (REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT)
/* Status of sync thread. */
enum sync_action {
/*
* Represent by MD_RECOVERY_SYNC, start when:
* 1) after assemble, sync data from first rdev to other copies, this
* must be done first before other sync actions and will only execute
* once;
* 2) resize the array(notice that this is not reshape), sync data for
* the new range;
*/
ACTION_RESYNC,
/*
* Represent by MD_RECOVERY_RECOVER, start when:
* 1) for new replacement, sync data based on the replace rdev or
* available copies from other rdev;
* 2) for new member disk while the array is degraded, sync data from
* other rdev;
* 3) reassemble after power failure or re-add a hot removed rdev, sync
* data from first rdev to other copies based on bitmap;
*/
ACTION_RECOVER,
/*
* Represent by MD_RECOVERY_SYNC | MD_RECOVERY_REQUESTED |
* MD_RECOVERY_CHECK, start when user echo "check" to sysfs api
* sync_action, used to check if data copies from differenct rdev are
* the same. The number of mismatch sectors will be exported to user
* by sysfs api mismatch_cnt;
*/
ACTION_CHECK,
/*
* Represent by MD_RECOVERY_SYNC | MD_RECOVERY_REQUESTED, start when
* user echo "repair" to sysfs api sync_action, usually paired with
* ACTION_CHECK, used to force syncing data once user found that there
* are inconsistent data,
*/
ACTION_REPAIR,
/*
* Represent by MD_RECOVERY_RESHAPE, start when new member disk is added
* to the conf, notice that this is different from spares or
* replacement;
*/
ACTION_RESHAPE,
/*
* Represent by MD_RECOVERY_FROZEN, can be set by sysfs api sync_action
* or internal usage like setting the array read-only, will forbid above
* actions.
*/
ACTION_FROZEN,
/*
* All above actions don't match.
*/
ACTION_IDLE,
NR_SYNC_ACTIONS,
};
/*
* The struct embedded in rdev is used to serialize IO.
*/
@ -371,13 +426,12 @@ struct mddev {
struct md_thread __rcu *thread; /* management thread */
struct md_thread __rcu *sync_thread; /* doing resync or reconstruct */
/* 'last_sync_action' is initialized to "none". It is set when a
* sync operation (i.e "data-check", "requested-resync", "resync",
* "recovery", or "reshape") is started. It holds this value even
/*
* Set when a sync operation is started. It holds this value even
* when the sync thread is "frozen" (interrupted) or "idle" (stopped
* or finished). It is overwritten when a new sync operation is begun.
* or finished). It is overwritten when a new sync operation is begun.
*/
char *last_sync_action;
enum sync_action last_sync_action;
sector_t curr_resync; /* last block scheduled */
/* As resync requests can complete out of order, we cannot easily track
* how much resync has been completed. So we occasionally pause until
@ -540,8 +594,6 @@ struct mddev {
*/
struct list_head deleting;
/* Used to synchronize idle and frozen for action_store() */
struct mutex sync_mutex;
/* The sequence number for sync thread */
atomic_t sync_seq;
@ -551,22 +603,46 @@ struct mddev {
};
enum recovery_flags {
/* flags for sync thread running status */
/*
* If neither SYNC or RESHAPE are set, then it is a recovery.
* set when one of sync action is set and new sync thread need to be
* registered, or just add/remove spares from conf.
*/
MD_RECOVERY_RUNNING, /* a thread is running, or about to be started */
MD_RECOVERY_SYNC, /* actually doing a resync, not a recovery */
MD_RECOVERY_RECOVER, /* doing recovery, or need to try it. */
MD_RECOVERY_INTR, /* resync needs to be aborted for some reason */
MD_RECOVERY_DONE, /* thread is done and is waiting to be reaped */
MD_RECOVERY_NEEDED, /* we might need to start a resync/recover */
MD_RECOVERY_REQUESTED, /* user-space has requested a sync (used with SYNC) */
MD_RECOVERY_CHECK, /* user-space request for check-only, no repair */
MD_RECOVERY_RESHAPE, /* A reshape is happening */
MD_RECOVERY_FROZEN, /* User request to abort, and not restart, any action */
MD_RECOVERY_ERROR, /* sync-action interrupted because io-error */
MD_RECOVERY_WAIT, /* waiting for pers->start() to finish */
MD_RESYNCING_REMOTE, /* remote node is running resync thread */
MD_RECOVERY_NEEDED,
/* sync thread is running, or about to be started */
MD_RECOVERY_RUNNING,
/* sync thread needs to be aborted for some reason */
MD_RECOVERY_INTR,
/* sync thread is done and is waiting to be unregistered */
MD_RECOVERY_DONE,
/* running sync thread must abort immediately, and not restart */
MD_RECOVERY_FROZEN,
/* waiting for pers->start() to finish */
MD_RECOVERY_WAIT,
/* interrupted because io-error */
MD_RECOVERY_ERROR,
/* flags determines sync action, see details in enum sync_action */
/* if just this flag is set, action is resync. */
MD_RECOVERY_SYNC,
/*
* paired with MD_RECOVERY_SYNC, if MD_RECOVERY_CHECK is not set,
* action is repair, means user requested resync.
*/
MD_RECOVERY_REQUESTED,
/*
* paired with MD_RECOVERY_SYNC and MD_RECOVERY_REQUESTED, action is
* check.
*/
MD_RECOVERY_CHECK,
/* recovery, or need to try it */
MD_RECOVERY_RECOVER,
/* reshape */
MD_RECOVERY_RESHAPE,
/* remote node is running resync thread */
MD_RESYNCING_REMOTE,
};
enum md_ro_state {
@ -653,7 +729,8 @@ struct md_personality
int (*hot_add_disk) (struct mddev *mddev, struct md_rdev *rdev);
int (*hot_remove_disk) (struct mddev *mddev, struct md_rdev *rdev);
int (*spare_active) (struct mddev *mddev);
sector_t (*sync_request)(struct mddev *mddev, sector_t sector_nr, int *skipped);
sector_t (*sync_request)(struct mddev *mddev, sector_t sector_nr,
sector_t max_sector, int *skipped);
int (*resize) (struct mddev *mddev, sector_t sectors);
sector_t (*size) (struct mddev *mddev, sector_t sectors, int raid_disks);
int (*check_reshape) (struct mddev *mddev);
@ -772,7 +849,7 @@ static inline void safe_put_page(struct page *p)
extern int register_md_personality(struct md_personality *p);
extern int unregister_md_personality(struct md_personality *p);
extern int register_md_cluster_operations(struct md_cluster_operations *ops,
extern int register_md_cluster_operations(const struct md_cluster_operations *ops,
struct module *module);
extern int unregister_md_cluster_operations(void);
extern int md_setup_cluster(struct mddev *mddev, int nodes);
@ -785,7 +862,10 @@ extern void md_unregister_thread(struct mddev *mddev, struct md_thread __rcu **t
extern void md_wakeup_thread(struct md_thread __rcu *thread);
extern void md_check_recovery(struct mddev *mddev);
extern void md_reap_sync_thread(struct mddev *mddev);
extern bool md_write_start(struct mddev *mddev, struct bio *bi);
extern enum sync_action md_sync_action(struct mddev *mddev);
extern enum sync_action md_sync_action_by_name(const char *page);
extern const char *md_sync_action_name(enum sync_action action);
extern void md_write_start(struct mddev *mddev, struct bio *bi);
extern void md_write_inc(struct mddev *mddev, struct bio *bi);
extern void md_write_end(struct mddev *mddev);
extern void md_done_sync(struct mddev *mddev, int blocks, int ok);
@ -809,11 +889,11 @@ extern void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev);
extern void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors);
extern int md_check_no_bitmap(struct mddev *mddev);
extern int md_integrity_register(struct mddev *mddev);
extern int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev);
extern int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale);
extern int mddev_init(struct mddev *mddev);
extern void mddev_destroy(struct mddev *mddev);
void md_init_stacking_limits(struct queue_limits *lim);
struct mddev *md_alloc(dev_t dev, char *name);
void mddev_put(struct mddev *mddev);
extern int md_run(struct mddev *mddev);
@ -852,7 +932,7 @@ static inline void rdev_dec_pending(struct md_rdev *rdev, struct mddev *mddev)
}
}
extern struct md_cluster_operations *md_cluster_ops;
extern const struct md_cluster_operations *md_cluster_ops;
static inline int mddev_is_clustered(struct mddev *mddev)
{
return mddev->cluster_info && mddev->bitmap_info.nodes > 1;
@ -908,7 +988,9 @@ void md_autostart_arrays(int part);
int md_set_array_info(struct mddev *mddev, struct mdu_array_info_s *info);
int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info);
int do_md_run(struct mddev *mddev);
void mddev_stack_rdev_limits(struct mddev *mddev, struct queue_limits *lim);
#define MDDEV_STACK_INTEGRITY (1u << 0)
int mddev_stack_rdev_limits(struct mddev *mddev, struct queue_limits *lim,
unsigned int flags);
int mddev_stack_new_rdev(struct mddev *mddev, struct md_rdev *rdev);
void mddev_update_io_opt(struct mddev *mddev, unsigned int nr_stripes);

30
drivers/md/raid0.c
View File

@ -365,30 +365,30 @@ static sector_t raid0_size(struct mddev *mddev, sector_t sectors, int raid_disks
return array_sectors;
}
static void free_conf(struct mddev *mddev, struct r0conf *conf)
static void raid0_free(struct mddev *mddev, void *priv)
{
struct r0conf *conf = priv;
kfree(conf->strip_zone);
kfree(conf->devlist);
kfree(conf);
}
static void raid0_free(struct mddev *mddev, void *priv)
{
struct r0conf *conf = priv;
free_conf(mddev, conf);
}
static int raid0_set_limits(struct mddev *mddev)
{
struct queue_limits lim;
int err;
blk_set_stacking_limits(&lim);
md_init_stacking_limits(&lim);
lim.max_hw_sectors = mddev->chunk_sectors;
lim.max_write_zeroes_sectors = mddev->chunk_sectors;
lim.io_min = mddev->chunk_sectors << 9;
lim.io_opt = lim.io_min * mddev->raid_disks;
mddev_stack_rdev_limits(mddev, &lim);
err = mddev_stack_rdev_limits(mddev, &lim, MDDEV_STACK_INTEGRITY);
if (err) {
queue_limits_cancel_update(mddev->gendisk->queue);
return err;
}
return queue_limits_set(mddev->gendisk->queue, &lim);
}
@ -415,7 +415,7 @@ static int raid0_run(struct mddev *mddev)
if (!mddev_is_dm(mddev)) {
ret = raid0_set_limits(mddev);
if (ret)
goto out_free_conf;
return ret;
}
/* calculate array device size */
@ -427,13 +427,7 @@ static int raid0_run(struct mddev *mddev)
dump_zones(mddev);
ret = md_integrity_register(mddev);
if (ret)
goto out_free_conf;
return 0;
out_free_conf:
free_conf(mddev, conf);
return ret;
return md_integrity_register(mddev);
}
/*

34
drivers/md/raid1.c
View File

@ -1687,8 +1687,7 @@ static bool raid1_make_request(struct mddev *mddev, struct bio *bio)
if (bio_data_dir(bio) == READ)
raid1_read_request(mddev, bio, sectors, NULL);
else {
if (!md_write_start(mddev,bio))
return false;
md_write_start(mddev,bio);
raid1_write_request(mddev, bio, sectors);
}
return true;
@ -1907,9 +1906,6 @@ static int raid1_add_disk(struct mddev *mddev, struct md_rdev *rdev)
if (mddev->recovery_disabled == conf->recovery_disabled)
return -EBUSY;
if (md_integrity_add_rdev(rdev, mddev))
return -ENXIO;
if (rdev->raid_disk >= 0)
first = last = rdev->raid_disk;
@ -2757,12 +2753,12 @@ static struct r1bio *raid1_alloc_init_r1buf(struct r1conf *conf)
*/
static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,
int *skipped)
sector_t max_sector, int *skipped)
{
struct r1conf *conf = mddev->private;
struct r1bio *r1_bio;
struct bio *bio;
sector_t max_sector, nr_sectors;
sector_t nr_sectors;
int disk = -1;
int i;
int wonly = -1;
@ -2778,7 +2774,6 @@ static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,
if (init_resync(conf))
return 0;
max_sector = mddev->dev_sectors;
if (sector_nr >= max_sector) {
/* If we aborted, we need to abort the
* sync on the 'current' bitmap chunk (there will
@ -3197,14 +3192,18 @@ static struct r1conf *setup_conf(struct mddev *mddev)
static int raid1_set_limits(struct mddev *mddev)
{
struct queue_limits lim;
int err;
blk_set_stacking_limits(&lim);
md_init_stacking_limits(&lim);
lim.max_write_zeroes_sectors = 0;
mddev_stack_rdev_limits(mddev, &lim);
err = mddev_stack_rdev_limits(mddev, &lim, MDDEV_STACK_INTEGRITY);
if (err) {
queue_limits_cancel_update(mddev->gendisk->queue);
return err;
}
return queue_limits_set(mddev->gendisk->queue, &lim);
}
static void raid1_free(struct mddev *mddev, void *priv);
static int raid1_run(struct mddev *mddev)
{
struct r1conf *conf;
@ -3238,7 +3237,7 @@ static int raid1_run(struct mddev *mddev)
if (!mddev_is_dm(mddev)) {
ret = raid1_set_limits(mddev);
if (ret)
goto abort;
return ret;
}
mddev->degraded = 0;
@ -3252,8 +3251,7 @@ static int raid1_run(struct mddev *mddev)
*/
if (conf->raid_disks - mddev->degraded < 1) {
md_unregister_thread(mddev, &conf->thread);
ret = -EINVAL;
goto abort;
return -EINVAL;
}
if (conf->raid_disks - mddev->degraded == 1)
@ -3277,14 +3275,8 @@ static int raid1_run(struct mddev *mddev)
md_set_array_sectors(mddev, raid1_size(mddev, 0, 0));
ret = md_integrity_register(mddev);
if (ret) {
if (ret)
md_unregister_thread(mddev, &mddev->thread);
goto abort;
}
return 0;
abort:
raid1_free(mddev, conf);
return ret;
}

23
drivers/md/raid10.c
View File

@ -1836,8 +1836,7 @@ static bool raid10_make_request(struct mddev *mddev, struct bio *bio)
&& md_flush_request(mddev, bio))
return true;
if (!md_write_start(mddev, bio))
return false;
md_write_start(mddev, bio);
if (unlikely(bio_op(bio) == REQ_OP_DISCARD))
if (!raid10_handle_discard(mddev, bio))
@ -2083,9 +2082,6 @@ static int raid10_add_disk(struct mddev *mddev, struct md_rdev *rdev)
if (rdev->saved_raid_disk < 0 && !_enough(conf, 1, -1))
return -EINVAL;
if (md_integrity_add_rdev(rdev, mddev))
return -ENXIO;
if (rdev->raid_disk >= 0)
first = last = rdev->raid_disk;
@ -3140,12 +3136,12 @@ static void raid10_set_cluster_sync_high(struct r10conf *conf)
*/
static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
int *skipped)
sector_t max_sector, int *skipped)
{
struct r10conf *conf = mddev->private;
struct r10bio *r10_bio;
struct bio *biolist = NULL, *bio;
sector_t max_sector, nr_sectors;
sector_t nr_sectors;
int i;
int max_sync;
sector_t sync_blocks;
@ -3175,10 +3171,6 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
return 0;
skipped:
max_sector = mddev->dev_sectors;
if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ||
test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery))
max_sector = mddev->resync_max_sectors;
if (sector_nr >= max_sector) {
conf->cluster_sync_low = 0;
conf->cluster_sync_high = 0;
@ -3980,12 +3972,17 @@ static int raid10_set_queue_limits(struct mddev *mddev)
{
struct r10conf *conf = mddev->private;
struct queue_limits lim;
int err;
blk_set_stacking_limits(&lim);
md_init_stacking_limits(&lim);
lim.max_write_zeroes_sectors = 0;
lim.io_min = mddev->chunk_sectors << 9;
lim.io_opt = lim.io_min * raid10_nr_stripes(conf);
mddev_stack_rdev_limits(mddev, &lim);
err = mddev_stack_rdev_limits(mddev, &lim, MDDEV_STACK_INTEGRITY);
if (err) {
queue_limits_cancel_update(mddev->gendisk->queue);
return err;
}
return queue_limits_set(mddev->gendisk->queue, &lim);
}

114
drivers/md/raid5.c
View File

@ -155,7 +155,7 @@ static int raid6_idx_to_slot(int idx, struct stripe_head *sh,
return slot;
}
static void print_raid5_conf (struct r5conf *conf);
static void print_raid5_conf(struct r5conf *conf);
static int stripe_operations_active(struct stripe_head *sh)
{
@ -5899,6 +5899,39 @@ out:
return ret;
}
enum reshape_loc {
LOC_NO_RESHAPE,
LOC_AHEAD_OF_RESHAPE,
LOC_INSIDE_RESHAPE,
LOC_BEHIND_RESHAPE,
};
static enum reshape_loc get_reshape_loc(struct mddev *mddev,
struct r5conf *conf, sector_t logical_sector)
{
sector_t reshape_progress, reshape_safe;
/*
* Spinlock is needed as reshape_progress may be
* 64bit on a 32bit platform, and so it might be
* possible to see a half-updated value
* Of course reshape_progress could change after
* the lock is dropped, so once we get a reference
* to the stripe that we think it is, we will have
* to check again.
*/
spin_lock_irq(&conf->device_lock);
reshape_progress = conf->reshape_progress;
reshape_safe = conf->reshape_safe;
spin_unlock_irq(&conf->device_lock);
if (reshape_progress == MaxSector)
return LOC_NO_RESHAPE;
if (ahead_of_reshape(mddev, logical_sector, reshape_progress))
return LOC_AHEAD_OF_RESHAPE;
if (ahead_of_reshape(mddev, logical_sector, reshape_safe))
return LOC_INSIDE_RESHAPE;
return LOC_BEHIND_RESHAPE;
}
static enum stripe_result make_stripe_request(struct mddev *mddev,
struct r5conf *conf, struct stripe_request_ctx *ctx,
sector_t logical_sector, struct bio *bi)
@ -5913,28 +5946,14 @@ static enum stripe_result make_stripe_request(struct mddev *mddev,
seq = read_seqcount_begin(&conf->gen_lock);
if (unlikely(conf->reshape_progress != MaxSector)) {
/*
* Spinlock is needed as reshape_progress may be
* 64bit on a 32bit platform, and so it might be
* possible to see a half-updated value
* Of course reshape_progress could change after
* the lock is dropped, so once we get a reference
* to the stripe that we think it is, we will have
* to check again.
*/
spin_lock_irq(&conf->device_lock);
if (ahead_of_reshape(mddev, logical_sector,
conf->reshape_progress)) {
previous = 1;
} else {
if (ahead_of_reshape(mddev, logical_sector,
conf->reshape_safe)) {
spin_unlock_irq(&conf->device_lock);
ret = STRIPE_SCHEDULE_AND_RETRY;
goto out;
}
enum reshape_loc loc = get_reshape_loc(mddev, conf,
logical_sector);
if (loc == LOC_INSIDE_RESHAPE) {
ret = STRIPE_SCHEDULE_AND_RETRY;
goto out;
}
spin_unlock_irq(&conf->device_lock);
if (loc == LOC_AHEAD_OF_RESHAPE)
previous = 1;
}
new_sector = raid5_compute_sector(conf, logical_sector, previous,
@ -6078,8 +6097,7 @@ static bool raid5_make_request(struct mddev *mddev, struct bio * bi)
ctx.do_flush = bi->bi_opf & REQ_PREFLUSH;
}
if (!md_write_start(mddev, bi))
return false;
md_write_start(mddev, bi);
/*
* If array is degraded, better not do chunk aligned read because
* later we might have to read it again in order to reconstruct
@ -6113,8 +6131,7 @@ static bool raid5_make_request(struct mddev *mddev, struct bio * bi)
/* Bail out if conflicts with reshape and REQ_NOWAIT is set */
if ((bi->bi_opf & REQ_NOWAIT) &&
(conf->reshape_progress != MaxSector) &&
!ahead_of_reshape(mddev, logical_sector, conf->reshape_progress) &&
ahead_of_reshape(mddev, logical_sector, conf->reshape_safe)) {
get_reshape_loc(mddev, conf, logical_sector) == LOC_INSIDE_RESHAPE) {
bio_wouldblock_error(bi);
if (rw == WRITE)
md_write_end(mddev);
@ -6255,7 +6272,9 @@ static sector_t reshape_request(struct mddev *mddev, sector_t sector_nr, int *sk
safepos = conf->reshape_safe;
sector_div(safepos, data_disks);
if (mddev->reshape_backwards) {
BUG_ON(writepos < reshape_sectors);
if (WARN_ON(writepos < reshape_sectors))
return MaxSector;
writepos -= reshape_sectors;
readpos += reshape_sectors;
safepos += reshape_sectors;
@ -6273,14 +6292,18 @@ static sector_t reshape_request(struct mddev *mddev, sector_t sector_nr, int *sk
* to set 'stripe_addr' which is where we will write to.
*/
if (mddev->reshape_backwards) {
BUG_ON(conf->reshape_progress == 0);
if (WARN_ON(conf->reshape_progress == 0))
return MaxSector;
stripe_addr = writepos;
BUG_ON((mddev->dev_sectors &
~((sector_t)reshape_sectors - 1))
- reshape_sectors - stripe_addr
!= sector_nr);
if (WARN_ON((mddev->dev_sectors &
~((sector_t)reshape_sectors - 1)) -
reshape_sectors - stripe_addr != sector_nr))
return MaxSector;
} else {
BUG_ON(writepos != sector_nr + reshape_sectors);
if (WARN_ON(writepos != sector_nr + reshape_sectors))
return MaxSector;
stripe_addr = sector_nr;
}
@ -6458,11 +6481,10 @@ ret:
}
static inline sector_t raid5_sync_request(struct mddev *mddev, sector_t sector_nr,
int *skipped)
sector_t max_sector, int *skipped)
{
struct r5conf *conf = mddev->private;
struct stripe_head *sh;
sector_t max_sector = mddev->dev_sectors;
sector_t sync_blocks;
int still_degraded = 0;
int i;
@ -7082,12 +7104,14 @@ raid5_store_skip_copy(struct mddev *mddev, const char *page, size_t len)
err = -ENODEV;
else if (new != conf->skip_copy) {
struct request_queue *q = mddev->gendisk->queue;
struct queue_limits lim = queue_limits_start_update(q);
conf->skip_copy = new;
if (new)
blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, q);
lim.features |= BLK_FEAT_STABLE_WRITES;
else
blk_queue_flag_clear(QUEUE_FLAG_STABLE_WRITES, q);
lim.features &= ~BLK_FEAT_STABLE_WRITES;
err = queue_limits_commit_update(q, &lim);
}
mddev_unlock_and_resume(mddev);
return err ?: len;
@ -7562,11 +7586,11 @@ static struct r5conf *setup_conf(struct mddev *mddev)
if (test_bit(Replacement, &rdev->flags)) {
if (disk->replacement)
goto abort;
RCU_INIT_POINTER(disk->replacement, rdev);
disk->replacement = rdev;
} else {
if (disk->rdev)
goto abort;
RCU_INIT_POINTER(disk->rdev, rdev);
disk->rdev = rdev;
}
if (test_bit(In_sync, &rdev->flags)) {
@ -7702,13 +7726,13 @@ static int raid5_set_limits(struct mddev *mddev)
*/
stripe = roundup_pow_of_two(data_disks * (mddev->chunk_sectors << 9));
blk_set_stacking_limits(&lim);
md_init_stacking_limits(&lim);
lim.io_min = mddev->chunk_sectors << 9;
lim.io_opt = lim.io_min * (conf->raid_disks - conf->max_degraded);
lim.raid_partial_stripes_expensive = 1;
lim.features |= BLK_FEAT_RAID_PARTIAL_STRIPES_EXPENSIVE;
lim.discard_granularity = stripe;
lim.max_write_zeroes_sectors = 0;
mddev_stack_rdev_limits(mddev, &lim);
mddev_stack_rdev_limits(mddev, &lim, 0);
rdev_for_each(rdev, mddev)
queue_limits_stack_bdev(&lim, rdev->bdev, rdev->new_data_offset,
mddev->gendisk->disk_name);
@ -8048,7 +8072,7 @@ static void raid5_status(struct seq_file *seq, struct mddev *mddev)
seq_printf (seq, "]");
}
static void print_raid5_conf (struct r5conf *conf)
static void print_raid5_conf(struct r5conf *conf)
{
struct md_rdev *rdev;
int i;
@ -8062,15 +8086,13 @@ static void print_raid5_conf (struct r5conf *conf)
conf->raid_disks,
conf->raid_disks - conf->mddev->degraded);
rcu_read_lock();
for (i = 0; i < conf->raid_disks; i++) {
rdev = rcu_dereference(conf->disks[i].rdev);
rdev = conf->disks[i].rdev;
if (rdev)
pr_debug(" disk %d, o:%d, dev:%pg\n",
i, !test_bit(Faulty, &rdev->flags),
rdev->bdev);
}
rcu_read_unlock();
}
static int raid5_spare_active(struct mddev *mddev)

42
drivers/mmc/core/block.c
View File

@ -2466,8 +2466,7 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
struct mmc_blk_data *md;
int devidx, ret;
char cap_str[10];
bool cache_enabled = false;
bool fua_enabled = false;
unsigned int features = 0;
devidx = ida_alloc_max(&mmc_blk_ida, max_devices - 1, GFP_KERNEL);
if (devidx < 0) {
@ -2499,7 +2498,24 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
*/
md->read_only = mmc_blk_readonly(card);
md->disk = mmc_init_queue(&md->queue, card);
if (mmc_host_cmd23(card->host)) {
if ((mmc_card_mmc(card) &&
card->csd.mmca_vsn >= CSD_SPEC_VER_3) ||
(mmc_card_sd(card) &&
card->scr.cmds & SD_SCR_CMD23_SUPPORT))
md->flags |= MMC_BLK_CMD23;
}
if (md->flags & MMC_BLK_CMD23 &&
((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
card->ext_csd.rel_sectors)) {
md->flags |= MMC_BLK_REL_WR;
features |= (BLK_FEAT_WRITE_CACHE | BLK_FEAT_FUA);
} else if (mmc_cache_enabled(card->host)) {
features |= BLK_FEAT_WRITE_CACHE;
}
md->disk = mmc_init_queue(&md->queue, card, features);
if (IS_ERR(md->disk)) {
ret = PTR_ERR(md->disk);
goto err_kfree;
@ -2539,26 +2555,6 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
set_capacity(md->disk, size);
if (mmc_host_cmd23(card->host)) {
if ((mmc_card_mmc(card) &&
card->csd.mmca_vsn >= CSD_SPEC_VER_3) ||
(mmc_card_sd(card) &&
card->scr.cmds & SD_SCR_CMD23_SUPPORT))
md->flags |= MMC_BLK_CMD23;
}
if (md->flags & MMC_BLK_CMD23 &&
((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
card->ext_csd.rel_sectors)) {
md->flags |= MMC_BLK_REL_WR;
fua_enabled = true;
cache_enabled = true;
}
if (mmc_cache_enabled(card->host))
cache_enabled = true;
blk_queue_write_cache(md->queue.queue, cache_enabled, fua_enabled);
string_get_size((u64)size, 512, STRING_UNITS_2,
cap_str, sizeof(cap_str));
pr_info("%s: %s %s %s%s\n",

20
drivers/mmc/core/queue.c
View File

@ -344,10 +344,12 @@ static const struct blk_mq_ops mmc_mq_ops = {
};
static struct gendisk *mmc_alloc_disk(struct mmc_queue *mq,
struct mmc_card *card)
struct mmc_card *card, unsigned int features)
{
struct mmc_host *host = card->host;
struct queue_limits lim = { };
struct queue_limits lim = {
.features = features,
};
struct gendisk *disk;
if (mmc_can_erase(card))
@ -376,18 +378,16 @@ static struct gendisk *mmc_alloc_disk(struct mmc_queue *mq,
lim.max_segments = host->max_segs;
}
if (mmc_host_is_spi(host) && host->use_spi_crc)
lim.features |= BLK_FEAT_STABLE_WRITES;
disk = blk_mq_alloc_disk(&mq->tag_set, &lim, mq);
if (IS_ERR(disk))
return disk;
mq->queue = disk->queue;
if (mmc_host_is_spi(host) && host->use_spi_crc)
blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, mq->queue);
blk_queue_rq_timeout(mq->queue, 60 * HZ);
blk_queue_flag_set(QUEUE_FLAG_NONROT, mq->queue);
blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, mq->queue);
dma_set_max_seg_size(mmc_dev(host), queue_max_segment_size(mq->queue));
INIT_WORK(&mq->recovery_work, mmc_mq_recovery_handler);
@ -413,10 +413,12 @@ static inline bool mmc_merge_capable(struct mmc_host *host)
* mmc_init_queue - initialise a queue structure.
* @mq: mmc queue
* @card: mmc card to attach this queue
* @features: block layer features (BLK_FEAT_*)
*
* Initialise a MMC card request queue.
*/
struct gendisk *mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card)
struct gendisk *mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card,
unsigned int features)
{
struct mmc_host *host = card->host;
struct gendisk *disk;
@ -460,7 +462,7 @@ struct gendisk *mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card)
return ERR_PTR(ret);
disk = mmc_alloc_disk(mq, card);
disk = mmc_alloc_disk(mq, card, features);
if (IS_ERR(disk))
blk_mq_free_tag_set(&mq->tag_set);
return disk;

3
drivers/mmc/core/queue.h
View File

@ -94,7 +94,8 @@ struct mmc_queue {
struct work_struct complete_work;
};
struct gendisk *mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card);
struct gendisk *mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card,
unsigned int features);
extern void mmc_cleanup_queue(struct mmc_queue *);
extern void mmc_queue_suspend(struct mmc_queue *);
extern void mmc_queue_resume(struct mmc_queue *);

9
drivers/mtd/mtd_blkdevs.c
View File

@ -336,6 +336,8 @@ int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new)
lim.logical_block_size = tr->blksize;
if (tr->discard)
lim.max_hw_discard_sectors = UINT_MAX;
if (tr->flush)
lim.features |= BLK_FEAT_WRITE_CACHE;
/* Create gendisk */
gd = blk_mq_alloc_disk(new->tag_set, &lim, new);
@ -372,13 +374,6 @@ int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new)
/* Create the request queue */
spin_lock_init(&new->queue_lock);
INIT_LIST_HEAD(&new->rq_list);
if (tr->flush)
blk_queue_write_cache(new->rq, true, false);
blk_queue_flag_set(QUEUE_FLAG_NONROT, new->rq);
blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, new->rq);
gd->queue = new->rq;
if (new->readonly)

17
drivers/nvdimm/btt.c
View File

@ -1501,9 +1501,15 @@ static int btt_blk_init(struct btt *btt)
.logical_block_size = btt->sector_size,
.max_hw_sectors = UINT_MAX,
.max_integrity_segments = 1,
.features = BLK_FEAT_SYNCHRONOUS,
};
int rc;
if (btt_meta_size(btt) && IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)) {
lim.integrity.tuple_size = btt_meta_size(btt);
lim.integrity.tag_size = btt_meta_size(btt);
}
btt->btt_disk = blk_alloc_disk(&lim, NUMA_NO_NODE);
if (IS_ERR(btt->btt_disk))
return PTR_ERR(btt->btt_disk);
@ -1513,17 +1519,6 @@ static int btt_blk_init(struct btt *btt)
btt->btt_disk->fops = &btt_fops;
btt->btt_disk->private_data = btt;
blk_queue_flag_set(QUEUE_FLAG_NONROT, btt->btt_disk->queue);
blk_queue_flag_set(QUEUE_FLAG_SYNCHRONOUS, btt->btt_disk->queue);
if (btt_meta_size(btt) && IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)) {
struct blk_integrity bi = {
.tuple_size = btt_meta_size(btt),
.tag_size = btt_meta_size(btt),
};
blk_integrity_register(btt->btt_disk, &bi);
}
set_capacity(btt->btt_disk, btt->nlba * btt->sector_size >> 9);
rc = device_add_disk(&btt->nd_btt->dev, btt->btt_disk, NULL);
if (rc)

14
drivers/nvdimm/pmem.c
View File

@ -455,6 +455,8 @@ static int pmem_attach_disk(struct device *dev,
.logical_block_size = pmem_sector_size(ndns),
.physical_block_size = PAGE_SIZE,
.max_hw_sectors = UINT_MAX,
.features = BLK_FEAT_WRITE_CACHE |
BLK_FEAT_SYNCHRONOUS,
};
int nid = dev_to_node(dev), fua;
struct resource *res = &nsio->res;
@ -463,7 +465,6 @@ static int pmem_attach_disk(struct device *dev,
struct dax_device *dax_dev;
struct nd_pfn_sb *pfn_sb;
struct pmem_device *pmem;
struct request_queue *q;
struct gendisk *disk;
void *addr;
int rc;
@ -495,6 +496,10 @@ static int pmem_attach_disk(struct device *dev,
dev_warn(dev, "unable to guarantee persistence of writes\n");
fua = 0;
}
if (fua)
lim.features |= BLK_FEAT_FUA;
if (is_nd_pfn(dev))
lim.features |= BLK_FEAT_DAX;
if (!devm_request_mem_region(dev, res->start, resource_size(res),
dev_name(&ndns->dev))) {
@ -505,7 +510,6 @@ static int pmem_attach_disk(struct device *dev,
disk = blk_alloc_disk(&lim, nid);
if (IS_ERR(disk))
return PTR_ERR(disk);
q = disk->queue;
pmem->disk = disk;
pmem->pgmap.owner = pmem;
@ -543,12 +547,6 @@ static int pmem_attach_disk(struct device *dev,
}
pmem->virt_addr = addr;
blk_queue_write_cache(q, true, fua);
blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
blk_queue_flag_set(QUEUE_FLAG_SYNCHRONOUS, q);
if (pmem->pfn_flags & PFN_MAP)
blk_queue_flag_set(QUEUE_FLAG_DAX, q);
disk->fops = &pmem_fops;
disk->private_data = pmem;
nvdimm_namespace_disk_name(ndns, disk->disk_name);

1
drivers/nvme/host/Kconfig
View File

@ -1,7 +1,6 @@
# SPDX-License-Identifier: GPL-2.0-only
config NVME_CORE
tristate
select BLK_DEV_INTEGRITY_T10 if BLK_DEV_INTEGRITY
config BLK_DEV_NVME
tristate "NVM Express block device"

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