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block-5.9-2020-08-14

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Merge tag 'block-5.9-2020-08-14' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "A few fixes on the block side of things:

   - Discard granularity fix (Coly)

   - rnbd cleanups (Guoqing)

   - md error handling fix (Dan)

   - md sysfs fix (Junxiao)

   - Fix flush request accounting, which caused an IO slowdown for some
     configurations (Ming)

   - Properly propagate loop flag for partition scanning (Lennart)"

* tag 'block-5.9-2020-08-14' of git://git.kernel.dk/linux-block:
  block: fix double account of flush request's driver tag
  loop: unset GENHD_FL_NO_PART_SCAN on LOOP_CONFIGURE
  rnbd: no need to set bi_end_io in rnbd_bio_map_kern
  rnbd: remove rnbd_dev_submit_io
  md-cluster: Fix potential error pointer dereference in resize_bitmaps()
  block: check queue's limits.discard_granularity in __blkdev_issue_discard()
  md: get sysfs entry after redundancy attr group create
This commit is contained in:
Linus Torvalds 2020-08-15 20:36:42 -07:00
commit 4b6c093e21
8 changed files with 62 additions and 66 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
block/blk-flush.c
View File

@ -308,9 +308,16 @@ static void blk_kick_flush(struct request_queue *q, struct blk_flush_queue *fq,
flush_rq->mq_ctx = first_rq->mq_ctx;
flush_rq->mq_hctx = first_rq->mq_hctx;
if (!q->elevator)
if (!q->elevator) {
flush_rq->tag = first_rq->tag;
else
/*
* We borrow data request's driver tag, so have to mark
* this flush request as INFLIGHT for avoiding double
* account of this driver tag
*/
flush_rq->rq_flags |= RQF_MQ_INFLIGHT;
} else
flush_rq->internal_tag = first_rq->internal_tag;
flush_rq->cmd_flags = REQ_OP_FLUSH | REQ_PREFLUSH;

9
block/blk-lib.c
View File

@ -47,6 +47,15 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
op = REQ_OP_DISCARD;
}
/* In case the discard granularity isn't set by buggy device driver */
if (WARN_ON_ONCE(!q->limits.discard_granularity)) {
char dev_name[BDEVNAME_SIZE];
bdevname(bdev, dev_name);
pr_err_ratelimited("%s: Error: discard_granularity is 0.\n", dev_name);
return -EOPNOTSUPP;
}
bs_mask = (bdev_logical_block_size(bdev) >> 9) - 1;
if ((sector | nr_sects) & bs_mask)
return -EINVAL;

2
drivers/block/loop.c
View File

@ -1171,6 +1171,8 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
if (part_shift)
lo->lo_flags |= LO_FLAGS_PARTSCAN;
partscan = lo->lo_flags & LO_FLAGS_PARTSCAN;
if (partscan)
lo->lo_disk->flags &= ~GENHD_FL_NO_PART_SCAN;
/* Grab the block_device to prevent its destruction after we
* put /dev/loopXX inode. Later in __loop_clr_fd() we bdput(bdev).

37
drivers/block/rnbd/rnbd-srv-dev.c
View File

@ -45,7 +45,7 @@ void rnbd_dev_close(struct rnbd_dev *dev)
kfree(dev);
}
static void rnbd_dev_bi_end_io(struct bio *bio)
void rnbd_dev_bi_end_io(struct bio *bio)
{
struct rnbd_dev_blk_io *io = bio->bi_private;
@ -63,8 +63,8 @@ static void rnbd_dev_bi_end_io(struct bio *bio)
* Map the kernel address into a bio suitable for io to a block
* device. Returns an error pointer in case of error.
*/
static struct bio *rnbd_bio_map_kern(void *data, struct bio_set *bs,
unsigned int len, gfp_t gfp_mask)
struct bio *rnbd_bio_map_kern(void *data, struct bio_set *bs,
unsigned int len, gfp_t gfp_mask)
{
unsigned long kaddr = (unsigned long)data;
unsigned long end = (kaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT;
@ -99,36 +99,5 @@ static struct bio *rnbd_bio_map_kern(void *data, struct bio_set *bs,
offset = 0;
}
bio->bi_end_io = bio_put;
return bio;
}
int rnbd_dev_submit_io(struct rnbd_dev *dev, sector_t sector, void *data,
size_t len, u32 bi_size, enum rnbd_io_flags flags,
short prio, void *priv)
{
struct rnbd_dev_blk_io *io;
struct bio *bio;
/* Generate bio with pages pointing to the rdma buffer */
bio = rnbd_bio_map_kern(data, dev->ibd_bio_set, len, GFP_KERNEL);
if (IS_ERR(bio))
return PTR_ERR(bio);
io = container_of(bio, struct rnbd_dev_blk_io, bio);
io->dev = dev;
io->priv = priv;
bio->bi_end_io = rnbd_dev_bi_end_io;
bio->bi_private = io;
bio->bi_opf = rnbd_to_bio_flags(flags);
bio->bi_iter.bi_sector = sector;
bio->bi_iter.bi_size = bi_size;
bio_set_prio(bio, prio);
bio_set_dev(bio, dev->bdev);
submit_bio(bio);
return 0;
}

19
drivers/block/rnbd/rnbd-srv-dev.h
View File

@ -41,6 +41,11 @@ void rnbd_dev_close(struct rnbd_dev *dev);
void rnbd_endio(void *priv, int error);
void rnbd_dev_bi_end_io(struct bio *bio);
struct bio *rnbd_bio_map_kern(void *data, struct bio_set *bs,
unsigned int len, gfp_t gfp_mask);
static inline int rnbd_dev_get_max_segs(const struct rnbd_dev *dev)
{
return queue_max_segments(bdev_get_queue(dev->bdev));
@ -75,18 +80,4 @@ static inline int rnbd_dev_get_discard_alignment(const struct rnbd_dev *dev)
return bdev_get_queue(dev->bdev)->limits.discard_alignment;
}
/**
* rnbd_dev_submit_io() - Submit an I/O to the disk
* @dev: device to that the I/O is submitted
* @sector: address to read/write data to
* @data: I/O data to write or buffer to read I/O date into
* @len: length of @data
* @bi_size: Amount of data that will be read/written
* @prio: IO priority
* @priv: private data passed to @io_fn
*/
int rnbd_dev_submit_io(struct rnbd_dev *dev, sector_t sector, void *data,
size_t len, u32 bi_size, enum rnbd_io_flags flags,
short prio, void *priv);
#endif /* RNBD_SRV_DEV_H */

32
drivers/block/rnbd/rnbd-srv.c
View File

@ -124,6 +124,9 @@ static int process_rdma(struct rtrs_srv *sess,
struct rnbd_srv_sess_dev *sess_dev;
u32 dev_id;
int err;
struct rnbd_dev_blk_io *io;
struct bio *bio;
short prio;
priv = kmalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
@ -142,18 +145,29 @@ static int process_rdma(struct rtrs_srv *sess,
priv->sess_dev = sess_dev;
priv->id = id;
err = rnbd_dev_submit_io(sess_dev->rnbd_dev, le64_to_cpu(msg->sector),
data, datalen, le32_to_cpu(msg->bi_size),
le32_to_cpu(msg->rw),
srv_sess->ver < RNBD_PROTO_VER_MAJOR ||
usrlen < sizeof(*msg) ?
0 : le16_to_cpu(msg->prio), priv);
if (unlikely(err)) {
rnbd_srv_err(sess_dev, "Submitting I/O to device failed, err: %d\n",
err);
/* Generate bio with pages pointing to the rdma buffer */
bio = rnbd_bio_map_kern(data, sess_dev->rnbd_dev->ibd_bio_set, datalen, GFP_KERNEL);
if (IS_ERR(bio)) {
rnbd_srv_err(sess_dev, "Failed to generate bio, err: %ld\n", PTR_ERR(bio));
goto sess_dev_put;
}
io = container_of(bio, struct rnbd_dev_blk_io, bio);
io->dev = sess_dev->rnbd_dev;
io->priv = priv;
bio->bi_end_io = rnbd_dev_bi_end_io;
bio->bi_private = io;
bio->bi_opf = rnbd_to_bio_flags(le32_to_cpu(msg->rw));
bio->bi_iter.bi_sector = le64_to_cpu(msg->sector);
bio->bi_iter.bi_size = le32_to_cpu(msg->bi_size);
prio = srv_sess->ver < RNBD_PROTO_VER_MAJOR ||
usrlen < sizeof(*msg) ? 0 : le16_to_cpu(msg->prio);
bio_set_prio(bio, prio);
bio_set_dev(bio, sess_dev->rnbd_dev->bdev);
submit_bio(bio);
return 0;
sess_dev_put:

1
drivers/md/md-cluster.c
View File

@ -1139,6 +1139,7 @@ static int resize_bitmaps(struct mddev *mddev, sector_t newsize, sector_t oldsiz
bitmap = get_bitmap_from_slot(mddev, i);
if (IS_ERR(bitmap)) {
pr_err("can't get bitmap from slot %d\n", i);
bitmap = NULL;
goto out;
}
counts = &bitmap->counts;

17
drivers/md/md.c
View File

@ -850,7 +850,13 @@ void mddev_unlock(struct mddev *mddev)
sysfs_remove_group(&mddev->kobj, &md_redundancy_group);
if (mddev->sysfs_action)
sysfs_put(mddev->sysfs_action);
if (mddev->sysfs_completed)
sysfs_put(mddev->sysfs_completed);
if (mddev->sysfs_degraded)
sysfs_put(mddev->sysfs_degraded);
mddev->sysfs_action = NULL;
mddev->sysfs_completed = NULL;
mddev->sysfs_degraded = NULL;
}
}
mddev->sysfs_active = 0;
@ -4068,6 +4074,8 @@ level_store(struct mddev *mddev, const char *buf, size_t len)
pr_warn("md: cannot register extra attributes for %s\n",
mdname(mddev));
mddev->sysfs_action = sysfs_get_dirent(mddev->kobj.sd, "sync_action");
mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed");
mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded");
}
if (oldpers->sync_request != NULL &&
pers->sync_request == NULL) {
@ -5582,14 +5590,9 @@ static void md_free(struct kobject *ko)
if (mddev->sysfs_state)
sysfs_put(mddev->sysfs_state);
if (mddev->sysfs_completed)
sysfs_put(mddev->sysfs_completed);
if (mddev->sysfs_degraded)
sysfs_put(mddev->sysfs_degraded);
if (mddev->sysfs_level)
sysfs_put(mddev->sysfs_level);
if (mddev->gendisk)
del_gendisk(mddev->gendisk);
if (mddev->queue)
@ -5757,8 +5760,6 @@ static int md_alloc(dev_t dev, char *name)
if (!error && mddev->kobj.sd) {
kobject_uevent(&mddev->kobj, KOBJ_ADD);
mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state");
mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed");
mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded");
mddev->sysfs_level = sysfs_get_dirent_safe(mddev->kobj.sd, "level");
}
mddev_put(mddev);
@ -6036,6 +6037,8 @@ int md_run(struct mddev *mddev)
pr_warn("md: cannot register extra attributes for %s\n",
mdname(mddev));
mddev->sysfs_action = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_action");
mddev->sysfs_completed = sysfs_get_dirent_safe(mddev->kobj.sd, "sync_completed");
mddev->sysfs_degraded = sysfs_get_dirent_safe(mddev->kobj.sd, "degraded");
} else if (mddev->ro == 2) /* auto-readonly not meaningful */
mddev->ro = 0;