diff options
| author | Kanchan Joshi <joshi.k@samsung.com> | 2020-09-28 12:55:49 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-10-28 05:40:42 +0300 |
| commit | 35bc10b2eafbb701064b94f283b77c54d3304842 (patch) | |
| tree | 661c7d397dc63b891f6c934f3658244e1de5edf2 /drivers/block/null_blk.h | |
| parent | f255c19b3ab46d3cad3b1b2e1036f4c926cb1d0c (diff) | |
| download | linux-35bc10b2eafbb701064b94f283b77c54d3304842.tar.xz | |
null_blk: synchronization fix for zoned device
Parallel write,read,zone-mgmt operations accessing/altering zone state
and write-pointer may get into race. Avoid the situation by using a new
spinlock for zoned device.
Concurrent zone-appends (on a zone) returning same write-pointer issue
is also avoided using this lock.
Cc: stable@vger.kernel.org
Fixes: e0489ed5daeb ("null_blk: Support REQ_OP_ZONE_APPEND")
Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/null_blk.h')
| -rw-r--r-- | drivers/block/null_blk.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/block/null_blk.h b/drivers/block/null_blk.h index d2e7db43a52a..3176b269b822 100644 --- a/drivers/block/null_blk.h +++ b/drivers/block/null_blk.h @@ -47,6 +47,7 @@ struct nullb_device { unsigned int nr_zones_closed; struct blk_zone *zones; sector_t zone_size_sects; + spinlock_t zone_lock; unsigned long size; /* device size in MB */ unsigned long completion_nsec; /* time in ns to complete a request */ |