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block-5.8-2020-06-19

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Merge tag 'block-5.8-2020-06-19' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

 - Use import_uuid() where appropriate (Andy)

 - bcache fixes (Coly, Mauricio, Zhiqiang)

 - blktrace sparse warnings fix (Jan)

 - blktrace concurrent setup fix (Luis)

 - blkdev_get use-after-free fix (Jason)

 - Ensure all blk-mq maps are updated (Weiping)

 - Loop invalidate bdev fix (Zheng)

* tag 'block-5.8-2020-06-19' of git://git.kernel.dk/linux-block:
  block: make function 'kill_bdev' static
  loop: replace kill_bdev with invalidate_bdev
  partitions/ldm: Replace uuid_copy() with import_uuid() where it makes sense
  block: update hctx map when use multiple maps
  blktrace: Avoid sparse warnings when assigning q->blk_trace
  blktrace: break out of blktrace setup on concurrent calls
  block: Fix use-after-free in blkdev_get()
  trace/events/block.h: drop kernel-doc for dropped function parameter
  blk-mq: Remove redundant 'return' statement
  bcache: pr_info() format clean up in bcache_device_init()
  bcache: use delayed kworker fo asynchronous devices registration
  bcache: check and adjust logical block size for backing devices
  bcache: fix potential deadlock problem in btree_gc_coalesce
This commit is contained in:
Linus Torvalds 2020-06-19 13:11:26 -07:00
commit d2b1c81f5f
10 changed files with 70 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
block/blk-mq-tag.c
View File

@ -376,7 +376,7 @@ static void __blk_mq_all_tag_iter(struct blk_mq_tags *tags,
void blk_mq_all_tag_iter(struct blk_mq_tags *tags, busy_tag_iter_fn *fn,
void *priv)
{
return __blk_mq_all_tag_iter(tags, fn, priv, BT_TAG_ITER_STATIC_RQS);
__blk_mq_all_tag_iter(tags, fn, priv, BT_TAG_ITER_STATIC_RQS);
}
/**

4
block/blk-mq.c
View File

@ -3479,7 +3479,9 @@ static void __blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set,
if (set->nr_maps == 1 && nr_hw_queues > nr_cpu_ids)
nr_hw_queues = nr_cpu_ids;
if (nr_hw_queues < 1 || nr_hw_queues == set->nr_hw_queues)
if (nr_hw_queues < 1)
return;
if (set->nr_maps == 1 && nr_hw_queues == set->nr_hw_queues)
return;
list_for_each_entry(q, &set->tag_list, tag_set_list)

2
block/partitions/ldm.c
View File

@ -910,7 +910,7 @@ static bool ldm_parse_dsk4 (const u8 *buffer, int buflen, struct vblk *vb)
return false;
disk = &vb->vblk.disk;
uuid_copy(&disk->disk_id, (uuid_t *)(buffer + 0x18 + r_name));
import_uuid(&disk->disk_id, buffer + 0x18 + r_name);
return true;
}

8
drivers/block/loop.c
View File

@ -1368,14 +1368,14 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info)
lo->lo_sizelimit != info->lo_sizelimit) {
size_changed = true;
sync_blockdev(lo->lo_device);
kill_bdev(lo->lo_device);
invalidate_bdev(lo->lo_device);
}
/* I/O need to be drained during transfer transition */
blk_mq_freeze_queue(lo->lo_queue);
if (size_changed && lo->lo_device->bd_inode->i_mapping->nrpages) {
/* If any pages were dirtied after kill_bdev(), try again */
/* If any pages were dirtied after invalidate_bdev(), try again */
err = -EAGAIN;
pr_warn("%s: loop%d (%s) has still dirty pages (nrpages=%lu)\n",
__func__, lo->lo_number, lo->lo_file_name,
@ -1615,11 +1615,11 @@ static int loop_set_block_size(struct loop_device *lo, unsigned long arg)
return 0;
sync_blockdev(lo->lo_device);
kill_bdev(lo->lo_device);
invalidate_bdev(lo->lo_device);
blk_mq_freeze_queue(lo->lo_queue);
/* kill_bdev should have truncated all the pages */
/* invalidate_bdev should have truncated all the pages */
if (lo->lo_device->bd_inode->i_mapping->nrpages) {
err = -EAGAIN;
pr_warn("%s: loop%d (%s) has still dirty pages (nrpages=%lu)\n",

8
drivers/md/bcache/btree.c
View File

@ -1389,7 +1389,7 @@ static int btree_gc_coalesce(struct btree *b, struct btree_op *op,
if (__set_blocks(n1, n1->keys + n2->keys,
block_bytes(b->c)) >
btree_blocks(new_nodes[i]))
goto out_nocoalesce;
goto out_unlock_nocoalesce;
keys = n2->keys;
/* Take the key of the node we're getting rid of */
@ -1418,7 +1418,7 @@ static int btree_gc_coalesce(struct btree *b, struct btree_op *op,
if (__bch_keylist_realloc(&keylist,
bkey_u64s(&new_nodes[i]->key)))
goto out_nocoalesce;
goto out_unlock_nocoalesce;
bch_btree_node_write(new_nodes[i], &cl);
bch_keylist_add(&keylist, &new_nodes[i]->key);
@ -1464,6 +1464,10 @@ static int btree_gc_coalesce(struct btree *b, struct btree_op *op,
/* Invalidated our iterator */
return -EINTR;
out_unlock_nocoalesce:
for (i = 0; i < nodes; i++)
mutex_unlock(&new_nodes[i]->write_lock);
out_nocoalesce:
closure_sync(&cl);

35
drivers/md/bcache/super.c
View File

@ -19,6 +19,7 @@
#include <linux/genhd.h>
#include <linux/idr.h>
#include <linux/kthread.h>
#include <linux/workqueue.h>
#include <linux/module.h>
#include <linux/random.h>
#include <linux/reboot.h>
@ -819,7 +820,8 @@ static void bcache_device_free(struct bcache_device *d)
}
static int bcache_device_init(struct bcache_device *d, unsigned int block_size,
sector_t sectors, make_request_fn make_request_fn)
sector_t sectors, make_request_fn make_request_fn,
struct block_device *cached_bdev)
{
struct request_queue *q;
const size_t max_stripes = min_t(size_t, INT_MAX,
@ -885,6 +887,20 @@ static int bcache_device_init(struct bcache_device *d, unsigned int block_size,
q->limits.io_min = block_size;
q->limits.logical_block_size = block_size;
q->limits.physical_block_size = block_size;
if (q->limits.logical_block_size > PAGE_SIZE && cached_bdev) {
/*
* This should only happen with BCACHE_SB_VERSION_BDEV.
* Block/page size is checked for BCACHE_SB_VERSION_CDEV.
*/
pr_info("%s: sb/logical block size (%u) greater than page size (%lu) falling back to device logical block size (%u)\n",
d->disk->disk_name, q->limits.logical_block_size,
PAGE_SIZE, bdev_logical_block_size(cached_bdev));
/* This also adjusts physical block size/min io size if needed */
blk_queue_logical_block_size(q, bdev_logical_block_size(cached_bdev));
}
blk_queue_flag_set(QUEUE_FLAG_NONROT, d->disk->queue);
blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, d->disk->queue);
blk_queue_flag_set(QUEUE_FLAG_DISCARD, d->disk->queue);
@ -1340,7 +1356,7 @@ static int cached_dev_init(struct cached_dev *dc, unsigned int block_size)
ret = bcache_device_init(&dc->disk, block_size,
dc->bdev->bd_part->nr_sects - dc->sb.data_offset,
cached_dev_make_request);
cached_dev_make_request, dc->bdev);
if (ret)
return ret;
@ -1453,7 +1469,7 @@ static int flash_dev_run(struct cache_set *c, struct uuid_entry *u)
kobject_init(&d->kobj, &bch_flash_dev_ktype);
if (bcache_device_init(d, block_bytes(c), u->sectors,
flash_dev_make_request))
flash_dev_make_request, NULL))
goto err;
bcache_device_attach(d, c, u - c->uuids);
@ -2364,7 +2380,7 @@ static bool bch_is_open(struct block_device *bdev)
}
struct async_reg_args {
struct work_struct reg_work;
struct delayed_work reg_work;
char *path;
struct cache_sb *sb;
struct cache_sb_disk *sb_disk;
@ -2375,7 +2391,7 @@ static void register_bdev_worker(struct work_struct *work)
{
int fail = false;
struct async_reg_args *args =
container_of(work, struct async_reg_args, reg_work);
container_of(work, struct async_reg_args, reg_work.work);
struct cached_dev *dc;
dc = kzalloc(sizeof(*dc), GFP_KERNEL);
@ -2405,7 +2421,7 @@ static void register_cache_worker(struct work_struct *work)
{
int fail = false;
struct async_reg_args *args =
container_of(work, struct async_reg_args, reg_work);
container_of(work, struct async_reg_args, reg_work.work);
struct cache *ca;
ca = kzalloc(sizeof(*ca), GFP_KERNEL);
@ -2433,11 +2449,12 @@ out:
static void register_device_aync(struct async_reg_args *args)
{
if (SB_IS_BDEV(args->sb))
INIT_WORK(&args->reg_work, register_bdev_worker);
INIT_DELAYED_WORK(&args->reg_work, register_bdev_worker);
else
INIT_WORK(&args->reg_work, register_cache_worker);
INIT_DELAYED_WORK(&args->reg_work, register_cache_worker);
queue_work(system_wq, &args->reg_work);
/* 10 jiffies is enough for a delay */
queue_delayed_work(system_wq, &args->reg_work, 10);
}
static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,

17
fs/block_dev.c
View File

@ -75,7 +75,7 @@ static void bdev_write_inode(struct block_device *bdev)
}
/* Kill _all_ buffers and pagecache , dirty or not.. */
void kill_bdev(struct block_device *bdev)
static void kill_bdev(struct block_device *bdev)
{
struct address_space *mapping = bdev->bd_inode->i_mapping;
@ -84,8 +84,7 @@ void kill_bdev(struct block_device *bdev)
invalidate_bh_lrus();
truncate_inode_pages(mapping, 0);
}
EXPORT_SYMBOL(kill_bdev);
}
/* Invalidate clean unused buffers and pagecache. */
void invalidate_bdev(struct block_device *bdev)
@ -1565,10 +1564,8 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
*/
if (!for_part) {
ret = devcgroup_inode_permission(bdev->bd_inode, perm);
if (ret != 0) {
bdput(bdev);
if (ret != 0)
return ret;
}
}
restart:
@ -1637,8 +1634,10 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
goto out_clear;
BUG_ON(for_part);
ret = __blkdev_get(whole, mode, 1);
if (ret)
if (ret) {
bdput(whole);
goto out_clear;
}
bdev->bd_contains = whole;
bdev->bd_part = disk_get_part(disk, partno);
if (!(disk->flags & GENHD_FL_UP) ||
@ -1688,7 +1687,6 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
disk_unblock_events(disk);
put_disk_and_module(disk);
out:
bdput(bdev);
return ret;
}
@ -1755,6 +1753,9 @@ int blkdev_get(struct block_device *bdev, fmode_t mode, void *holder)
bdput(whole);
}
if (res)
bdput(bdev);
return res;
}
EXPORT_SYMBOL(blkdev_get);

2
include/linux/fs.h
View File

@ -2592,7 +2592,6 @@ extern void bdput(struct block_device *);
extern void invalidate_bdev(struct block_device *);
extern void iterate_bdevs(void (*)(struct block_device *, void *), void *);
extern int sync_blockdev(struct block_device *bdev);
extern void kill_bdev(struct block_device *);
extern struct super_block *freeze_bdev(struct block_device *);
extern void emergency_thaw_all(void);
extern void emergency_thaw_bdev(struct super_block *sb);
@ -2608,7 +2607,6 @@ static inline bool sb_is_blkdev_sb(struct super_block *sb)
#else
static inline void bd_forget(struct inode *inode) {}
static inline int sync_blockdev(struct block_device *bdev) { return 0; }
static inline void kill_bdev(struct block_device *bdev) {}
static inline void invalidate_bdev(struct block_device *bdev) {}
static inline struct super_block *freeze_bdev(struct block_device *sb)

1
include/trace/events/block.h
View File

@ -254,7 +254,6 @@ TRACE_EVENT(block_bio_bounce,
* block_bio_complete - completed all work on the block operation
* @q: queue holding the block operation
* @bio: block operation completed
* @error: io error value
*
* This tracepoint indicates there is no further work to do on this
* block IO operation @bio.

30
kernel/trace/blktrace.c
View File

@ -3,6 +3,9 @@
* Copyright (C) 2006 Jens Axboe <axboe@kernel.dk>
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/blkdev.h>
#include <linux/blktrace_api.h>
@ -344,7 +347,8 @@ static int __blk_trace_remove(struct request_queue *q)
{
struct blk_trace *bt;
bt = xchg(&q->blk_trace, NULL);
bt = rcu_replace_pointer(q->blk_trace, NULL,
lockdep_is_held(&q->blk_trace_mutex));
if (!bt)
return -EINVAL;
@ -494,6 +498,17 @@ static int do_blk_trace_setup(struct request_queue *q, char *name, dev_t dev,
*/
strreplace(buts->name, '/', '_');
/*
* bdev can be NULL, as with scsi-generic, this is a helpful as
* we can be.
*/
if (rcu_dereference_protected(q->blk_trace,
lockdep_is_held(&q->blk_trace_mutex))) {
pr_warn("Concurrent blktraces are not allowed on %s\n",
buts->name);
return -EBUSY;
}
bt = kzalloc(sizeof(*bt), GFP_KERNEL);
if (!bt)
return -ENOMEM;
@ -543,10 +558,7 @@ static int do_blk_trace_setup(struct request_queue *q, char *name, dev_t dev,
bt->pid = buts->pid;
bt->trace_state = Blktrace_setup;
ret = -EBUSY;
if (cmpxchg(&q->blk_trace, NULL, bt))
goto err;
rcu_assign_pointer(q->blk_trace, bt);
get_probe_ref();
ret = 0;
@ -1629,7 +1641,8 @@ static int blk_trace_remove_queue(struct request_queue *q)
{
struct blk_trace *bt;
bt = xchg(&q->blk_trace, NULL);
bt = rcu_replace_pointer(q->blk_trace, NULL,
lockdep_is_held(&q->blk_trace_mutex));
if (bt == NULL)
return -EINVAL;
@ -1661,10 +1674,7 @@ static int blk_trace_setup_queue(struct request_queue *q,
blk_trace_setup_lba(bt, bdev);
ret = -EBUSY;
if (cmpxchg(&q->blk_trace, NULL, bt))
goto free_bt;
rcu_assign_pointer(q->blk_trace, bt);
get_probe_ref();
return 0;