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cifs: fix nodfs mount option

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Skip DFS resolving when mounting with 'nodfs' even if
CONFIG_CIFS_DFS_UPCALL is enabled.

Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Cc: stable@vger.kernel.org # 5.11
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Paulo Alcantara 2021-02-24 20:59:24 -03:00 committed by Steve French
parent d08395a3f2
commit d01132ae50
1 changed files with 4 additions and 4 deletions
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8
fs/cifs/connect.c
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@ -3379,15 +3379,15 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx)
rc = mount_get_conns(ctx, cifs_sb, &xid, &server, &ses, &tcon);
/*
* Unconditionally try to get an DFS referral (even cached) to determine whether it is an
* DFS mount.
* If called with 'nodfs' mount option, then skip DFS resolving. Otherwise unconditionally
* try to get an DFS referral (even cached) to determine whether it is an DFS mount.
*
* Skip prefix path to provide support for DFS referrals from w2k8 servers which don't seem
* to respond with PATH_NOT_COVERED to requests that include the prefix.
*/
if (dfs_cache_find(xid, ses, cifs_sb->local_nls, cifs_remap(cifs_sb), ctx->UNC + 1, NULL,
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS) ||
dfs_cache_find(xid, ses, cifs_sb->local_nls, cifs_remap(cifs_sb), ctx->UNC + 1, NULL,
NULL)) {
/* No DFS referral was returned. Looks like a regular share. */
if (rc)
goto error;
/* Check if it is fully accessible and then mount it */