Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-09-20 15:03:04 +00:00
Code Issues Packages Projects Releases Wiki Activity

nbd: freeze the queue for queue limits updates

Browse Source 
nbd currently updates the logical and physical block sizes as well
as the discard_sectors on a live queue.  Freeze the queue first to
make sure there are not commands in flight that can see torn or
inconsistent limits.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20240229143846.1047223-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2024-02-29 06:38:45 -08:00 committed by Jens Axboe
parent 7ea201f2cc
commit 242a49e5c8
1 changed files with 13 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/block/nbd.c
View File

@ -316,7 +316,7 @@ static void nbd_mark_nsock_dead(struct nbd_device *nbd, struct nbd_sock *nsock,
nsock->sent = 0;
}
static int nbd_set_size(struct nbd_device *nbd, loff_t bytesize,
static int __nbd_set_size(struct nbd_device *nbd, loff_t bytesize,
loff_t blksize)
{
if (!blksize)
@ -348,6 +348,18 @@ static int nbd_set_size(struct nbd_device *nbd, loff_t bytesize,
return 0;
}
static int nbd_set_size(struct nbd_device *nbd, loff_t bytesize,
loff_t blksize)
{
int error;
blk_mq_freeze_queue(nbd->disk->queue);
error = __nbd_set_size(nbd, bytesize, blksize);
blk_mq_unfreeze_queue(nbd->disk->queue);
return error;
}
static void nbd_complete_rq(struct request *req)
{
struct nbd_cmd *cmd = blk_mq_rq_to_pdu(req);