diff options
| author |   Pavel Shilovsky <piastry@etersoft.ru> | 2013-10-23 17:49:47 +0400 |
|---|---|---|
| committer |   Steve French <smfrench@gmail.com> | 2013-11-11 16:31:03 -0600 |
| commit | eb85d94bdd91fb4dbea4ee465d4349cbea4eaaca (patch) | |
| tree | 217ed41bd6bdf55b5a7263d42ebab386f6377785 /fs/cifs/smb1ops.c | |
| parent | Merge tag 'ftrace-urgent-3.12-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace (diff) | |
| download | linux-dev-eb85d94bdd91fb4dbea4ee465d4349cbea4eaaca.tar.xz linux-dev-eb85d94bdd91fb4dbea4ee465d4349cbea4eaaca.zip | |
CIFS: Fix symbolic links usage
Now we treat any reparse point as a symbolic link and map it to a Unix
one that is not true in a common case due to many reparse point types
supported by SMB servers.
Distinguish reparse point types into two groups:
1) that can be accessed directly through a reparse point
(junctions, deduplicated files, NFS symlinks);
2) that need to be processed manually (Windows symbolic links, DFS);
and map only Windows symbolic links to Unix ones.
Cc: <stable@vger.kernel.org>
Acked-by: Jeff Layton <jlayton@redhat.com>
Reported-and-tested-by: Joao Correia <joaomiguelcorreia@gmail.com>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/smb1ops.c')
| -rw-r--r-- | fs/cifs/smb1ops.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c index 384cffe42850..5f5ba0dc2ee1 100644 --- a/fs/cifs/smb1ops.c +++ b/fs/cifs/smb1ops.c @@ -534,10 +534,12 @@ cifs_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, static int cifs_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, const char *full_path, - FILE_ALL_INFO *data, bool *adjustTZ) + FILE_ALL_INFO *data, bool *adjustTZ, bool *symlink) { int rc; + *symlink = false; + /* could do find first instead but this returns more info */ rc = CIFSSMBQPathInfo(xid, tcon, full_path, data, 0 /* not legacy */, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & @@ -554,6 +556,23 @@ cifs_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, CIFS_MOUNT_MAP_SPECIAL_CHR); *adjustTZ = true; } + + if (!rc && (le32_to_cpu(data->Attributes) & ATTR_REPARSE)) { + int tmprc; + int oplock = 0; + __u16 netfid; + + /* Need to check if this is a symbolic link or not */ + tmprc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, + FILE_READ_ATTRIBUTES, 0, &netfid, &oplock, + NULL, cifs_sb->local_nls, + cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); + if (tmprc == -EOPNOTSUPP) + *symlink = true; + else + CIFSSMBClose(xid, tcon, netfid); + } + return rc; } |