mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-13 06:08:07 +00:00
Code Issues Releases Wiki Activity

cifs: Set CIFS_MOUNT_USE_PREFIX_PATH flag on setting cifs_sb->prepath.

Browse source 
[ Upstream commit a738c93fb1 ]

While debugging another issue today, Steve and I noticed that if a
subdir for a file share is already mounted on the client, any new
mount of any other subdir (or the file share root) of the same share
results in sharing the cifs superblock, which e.g. can result in
incorrect device name.

While setting prefix path for the root of a cifs_sb,
CIFS_MOUNT_USE_PREFIX_PATH flag should also be set.
Without it, prepath is not even considered in some places,
and output of "mount" and various /proc/<>/*mount* related
options can be missing part of the device name.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Shyam Prasad N 2021-02-11 03:26:54 -08:00 committed by Greg Kroah-Hartman
parent f885d30f4b
commit ad48c641e7
1 changed files with 1 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
fs/cifs/connect.c
View file

@ -3607,6 +3607,7 @@ int cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
cifs_sb->prepath = kstrdup(pvolume_info->prepath, GFP_KERNEL);
if (cifs_sb->prepath == NULL)
return -ENOMEM;
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH;
}
return 0;