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nbd: use the correct block_device in nbd_bdev_reset

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[ Upstream commit 2a852a693f ]

The bdev parameter to ->ioctl contains the block device that the ioctl
is called on, which can be the partition.  But the openers check in
nbd_bdev_reset really needs to check use the whole device, so switch to
using that.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20220330052917.2566582-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stable-dep-of: e5cfefa97b ("block: fix scan partition for exclusively open device again")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Christoph Hellwig 2022-03-30 07:29:03 +02:00 committed by Greg Kroah-Hartman
parent 7889dfc194
commit ce4bbb2aa9
1 changed files with 7 additions and 7 deletions
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14
drivers/block/nbd.c
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@ -1167,11 +1167,11 @@ static int nbd_reconnect_socket(struct nbd_device *nbd, unsigned long arg)
return -ENOSPC;
}
static void nbd_bdev_reset(struct block_device *bdev)
static void nbd_bdev_reset(struct nbd_device *nbd)
{
if (bdev->bd_openers > 1)
if (nbd->disk->part0->bd_openers > 1)
return;
set_capacity(bdev->bd_disk, 0);
set_capacity(nbd->disk, 0);
}
static void nbd_parse_flags(struct nbd_device *nbd)
@ -1337,7 +1337,7 @@ static int nbd_start_device(struct nbd_device *nbd)
return nbd_set_size(nbd, config->bytesize, nbd_blksize(config));
}
static int nbd_start_device_ioctl(struct nbd_device *nbd, struct block_device *bdev)
static int nbd_start_device_ioctl(struct nbd_device *nbd)
{
struct nbd_config *config = nbd->config;
int ret;
@ -1358,7 +1358,7 @@ static int nbd_start_device_ioctl(struct nbd_device *nbd, struct block_device *b
flush_workqueue(nbd->recv_workq);
mutex_lock(&nbd->config_lock);
nbd_bdev_reset(bdev);
nbd_bdev_reset(nbd);
/* user requested, ignore socket errors */
if (test_bit(NBD_RT_DISCONNECT_REQUESTED, &config->runtime_flags))
ret = 0;
@ -1372,7 +1372,7 @@ static void nbd_clear_sock_ioctl(struct nbd_device *nbd,
{
nbd_clear_sock(nbd);
__invalidate_device(bdev, true);
nbd_bdev_reset(bdev);
nbd_bdev_reset(nbd);
if (test_and_clear_bit(NBD_RT_HAS_CONFIG_REF,
&nbd->config->runtime_flags))
nbd_config_put(nbd);
@ -1418,7 +1418,7 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
config->flags = arg;
return 0;
case NBD_DO_IT:
return nbd_start_device_ioctl(nbd, bdev);
return nbd_start_device_ioctl(nbd);
case NBD_CLEAR_QUE:
/*
* This is for compatibility only. The queue is always cleared