From: Paulo Alcantara pc@manguebit.com
commit 11260c3d608b59231f4c228147a795ab21a10b33 upstream.
Customer reported that they couldn't mount their DFS link that was seen by the client as a DFS interlink -- special form of DFS link where its single target may point to a different DFS namespace -- and it turned out that it was just a regular DFS link where its referral header flags missed the StorageServers bit thus making the client think it couldn't tree connect to target directly without requiring further referrals.
When the DFS link referral header flags misses the StoraServers bit and its target doesn't respond to any referrals, then tree connect to it.
Fixes: a1c0d00572fc ("cifs: share dfs connections and supers") Cc: stable@vger.kernel.org Signed-off-by: Paulo Alcantara (SUSE) pc@manguebit.com Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/smb/client/dfs.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
--- a/fs/smb/client/dfs.c +++ b/fs/smb/client/dfs.c @@ -178,8 +178,12 @@ static int __dfs_mount_share(struct cifs struct dfs_cache_tgt_list tl = DFS_CACHE_TGT_LIST_INIT(tl);
rc = dfs_get_referral(mnt_ctx, ref_path + 1, NULL, &tl); - if (rc) + if (rc) { + rc = cifs_mount_get_tcon(mnt_ctx); + if (!rc) + rc = cifs_is_path_remote(mnt_ctx); break; + }
tit = dfs_cache_get_tgt_iterator(&tl); if (!tit) {