[12/21] cifs: add fallback in is_path_accessible for old servers

From: Greg KH
Date: Thu May 19 2011 - 14:28:43 EST

2.6.32-longterm review patch. If anyone has any objections, please let us know.


From: Jeff Layton <jlayton@xxxxxxxxxx>

commit 221d1d797202984cb874e3ed9f1388593d34ee22 upstream.

The is_path_accessible check uses a QPathInfo call, which isn't
supported by ancient win9x era servers. Fall back to an older
SMBQueryInfo call if it fails with the magic error codes.

Reported-and-Tested-by: Sandro Bonazzola <sandro.bonazzola@xxxxxxxxx>
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
Signed-off-by: Steve French <sfrench@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

fs/cifs/connect.c | 5 +++++
1 file changed, 5 insertions(+)

--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2231,6 +2231,11 @@ is_path_accessible(int xid, struct cifsT
0 /* not legacy */, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
+ if (rc == -EOPNOTSUPP || rc == -EINVAL)
+ rc = SMBQueryInformation(xid, tcon, full_path, pfile_info,
+ cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
return rc;

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