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Revert "nfs: clear SB_RDONLY before getting superblock"

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This reverts commit 8cd9b78594.

Silently ignoring the "ro" and "rw" mount options causes user confusion,
and regressions.

Reported-by: Alkis Georgopoulos<alkisg@gmail.com>
Cc: Li Lingfeng <lilingfeng3@huawei.com>
Fixes: 8cd9b78594 ("nfs: clear SB_RDONLY before getting superblock")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2025-11-28 13:39:38 -05:00
parent 400fa37afb
commit d216b698d4
1 changed files with 0 additions and 9 deletions
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9
fs/nfs/super.c
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@ -1308,17 +1308,8 @@ int nfs_get_tree_common(struct fs_context *fc)
if (IS_ERR(server))
return PTR_ERR(server);
/*
* When NFS_MOUNT_UNSHARED is not set, NFS forces the sharing of a
* superblock among each filesystem that mounts sub-directories
* belonging to a single exported root path.
* To prevent interference between different filesystems, the
* SB_RDONLY flag should be removed from the superblock.
*/
if (server->flags & NFS_MOUNT_UNSHARED)
compare_super = NULL;
else
fc->sb_flags &= ~SB_RDONLY;
/* -o noac implies -o sync */
if (server->flags & NFS_MOUNT_NOAC)