diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-11-16 17:57:02 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-11-16 18:34:14 +0300 |
| commit | 8a6f7bbf29d1d61d3ff18f0a0feead9f287c9b14 (patch) | |
| tree | 88d7e6a4845d3a09eec81bc577fc7d7d31282fd5 /drivers/block | |
| parent | 2ebcabf3dba50f61850efec9a331bd061c6333e0 (diff) | |
| download | linux-8a6f7bbf29d1d61d3ff18f0a0feead9f287c9b14.tar.xz | |
aoe: don't call set_capacity from irq context
Updating the block device size from irq context can lead to torn
writes of the 64-bit value, and prevents us from using normal
process context locking primitives to serialize access to the 64-bit
nr_sectors value. Defer the set_capacity to the already existing
workqueue handler, where it can be merged with the update of the
block device size by using set_capacity_and_notify. As an extra
bonus this also adds proper uevent notifications for the resize.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/aoe/aoecmd.c | 15 |
1 files changed, 4 insertions, 11 deletions
diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c index 313f0b946fe2..ac720bdcd983 100644 --- a/drivers/block/aoe/aoecmd.c +++ b/drivers/block/aoe/aoecmd.c @@ -890,19 +890,13 @@ void aoecmd_sleepwork(struct work_struct *work) { struct aoedev *d = container_of(work, struct aoedev, work); - struct block_device *bd; - u64 ssize; if (d->flags & DEVFL_GDALLOC) aoeblk_gdalloc(d); if (d->flags & DEVFL_NEWSIZE) { - ssize = get_capacity(d->gd); - bd = bdget_disk(d->gd, 0); - if (bd) { - bd_set_nr_sectors(bd, ssize); - bdput(bd); - } + set_capacity_and_notify(d->gd, d->ssize); + spin_lock_irq(&d->lock); d->flags |= DEVFL_UP; d->flags &= ~DEVFL_NEWSIZE; @@ -971,10 +965,9 @@ ataid_complete(struct aoedev *d, struct aoetgt *t, unsigned char *id) d->geo.start = 0; if (d->flags & (DEVFL_GDALLOC|DEVFL_NEWSIZE)) return; - if (d->gd != NULL) { - set_capacity(d->gd, ssize); + if (d->gd != NULL) d->flags |= DEVFL_NEWSIZE; - } else + else d->flags |= DEVFL_GDALLOC; schedule_work(&d->work); } |