]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
block: Do not reread partition table on exclusively open device
authorJan Kara <jack@suse.cz>
Wed, 30 Nov 2022 17:56:53 +0000 (18:56 +0100)
committerJens Axboe <axboe@kernel.dk>
Thu, 1 Dec 2022 14:44:03 +0000 (07:44 -0700)
commit36369f46e91785688a5f39d7a5590e3f07981316
tree52a19bbd161d347cd5f93a68f1e0bebe189f8a61
parent92a34c461719eb4a3f95353bb7b27a3238eb7478
block: Do not reread partition table on exclusively open device

Since commit 10c70d95c0f2 ("block: remove the bd_openers checks in
blk_drop_partitions") we allow rereading of partition table although
there are users of the block device. This has an undesirable consequence
that e.g. if sda and sdb are assembled to a RAID1 device md0 with
partitions, BLKRRPART ioctl on sda will rescan partition table and
create sda1 device. This partition device under a raid device confuses
some programs (such as libstorage-ng used for initial partitioning for
distribution installation) leading to failures.

Fix the problem refusing to rescan partitions if there is another user
that has the block device exclusively open.

Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/all/20221130135344.2ul4cyfstfs3znxg@quack3
Fixes: 10c70d95c0f2 ("block: remove the bd_openers checks in blk_drop_partitions")
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20221130175653.24299-1-jack@suse.cz
[axboe: fold in followup fix]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block/blk.h
block/genhd.c
block/ioctl.c