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| author | Sean Finney <seanius@seanius.net> | 2011-04-11 13:19:31 +0000 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2011-05-19 14:10:54 +0000 |
| commit | c1508ca23653245266e2e3ab69a8dad464f7a569 (patch) | |
| tree | 31105f22f36808917ee218f196fb65f8676b3e4e /fs/cifs/connect.c | |
| parent | dd61394586dbd9387fe53b325c6807f61734cf89 (diff) | |
| download | linux-c1508ca23653245266e2e3ab69a8dad464f7a569.tar.gz linux-c1508ca23653245266e2e3ab69a8dad464f7a569.tar.bz2 linux-c1508ca23653245266e2e3ab69a8dad464f7a569.zip | |
cifs: Add support for mounting Windows 2008 DFS shares
Windows 2008 CIFS servers do not always return PATH_NOT_COVERED when
attempting to access a DFS share. Therefore, when checking for remote
shares, unconditionally ask for a DFS referral for the UNC (w/out prepath)
before continuing with previous behavior of attempting to access the UNC +
prepath and checking for PATH_NOT_COVERED.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=31092
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Sean Finney <seanius@seanius.net>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/connect.c')
| -rw-r--r-- | fs/cifs/connect.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index b6c6a3629b07..c7ebeee38c67 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -2937,6 +2937,24 @@ try_mount_again: (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)); remote_path_check: +#ifdef CONFIG_CIFS_DFS_UPCALL + /* + * Perform an unconditional check for whether there are DFS + * referrals for this path without prefix, 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. + * Chase the referral if found, otherwise continue normally. + */ + if (referral_walks_count == 0) { + int refrc = expand_dfs_referral(xid, pSesInfo, volume_info, + cifs_sb, &mount_data, false); + if (!refrc) { + referral_walks_count++; + goto try_mount_again; + } + } +#endif + /* check if a whole path (including prepath) is not remote */ if (!rc && tcon) { /* build_path_to_root works only when we have a valid tcon */ |