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| author |   Sachin Prabhu <sprabhu@redhat.com> | 2016-12-15 12:31:19 +0530 |
|---|---|---|
| committer |   Steve French <smfrench@gmail.com> | 2016-12-15 01:42:54 -0600 |
| commit | 374402a2a1dfbbee8ab1a5a32ec4887bf8c15d52 (patch) | |
| tree | e886fc71908f5e2ac4c97b68e30e7b364417cfb2 /fs/cifs/dir.c | |
| parent | Fix default behaviour for empty domains and add domainauto option (diff) | |
| download | linux-dev-374402a2a1dfbbee8ab1a5a32ec4887bf8c15d52.tar.xz linux-dev-374402a2a1dfbbee8ab1a5a32ec4887bf8c15d52.zip | |
cifs_get_root shouldn't use path with tree name
When a server returns the optional flag SMB_SHARE_IS_IN_DFS in response
to a tree connect, cifs_build_path_to_root() will return a pathname
which includes the hostname. This causes problems with cifs_get_root()
which separates each component and does a lookup for each component of
the path which in this case will incorrectly include looking up the
hostname component as a path component.
We encountered a problem with dfs shares hosted by a Netapp. When
connecting to nodes pointed to by the DFS share. The tree connect for
these nodes return SMB_SHARE_IS_IN_DFS resulting failures in lookup
in cifs_get_root().
RH bz: 1373153
The patch was tested against a Netapp simulator and by a user using an
actual Netapp server.
Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Reported-by: Pierguido Lambri <plambri@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/dir.c')
| -rw-r--r-- | fs/cifs/dir.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c index 789ff1df2d8d..2c227a99f369 100644 --- a/fs/cifs/dir.c +++ b/fs/cifs/dir.c @@ -47,7 +47,7 @@ renew_parental_timestamps(struct dentry *direntry) char * cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, - struct cifs_tcon *tcon) + struct cifs_tcon *tcon, int add_treename) { int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0; int dfsplen; @@ -59,7 +59,7 @@ cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, return full_path; } - if (tcon->Flags & SMB_SHARE_IS_IN_DFS) + if (add_treename) dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); else dfsplen = 0; |