[CIFS] Support deep tree mounts (e.g. mounts to //server/share/path)

Samba bugzilla #4040

Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index 8623902..81df2bf 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -1344,6 +1344,7 @@
 #define SMB_QUERY_ATTR_FLAGS            0x206  /* append,immutable etc. */
 #define SMB_QUERY_POSIX_PERMISSION      0x207
 #define SMB_QUERY_POSIX_LOCK            0x208
+/* #define SMB_POSIX_OPEN  		0x209 */
 #define SMB_QUERY_FILE_INTERNAL_INFO    0x3ee
 #define SMB_QUERY_FILE_ACCESS_INFO      0x3f0
 #define SMB_QUERY_FILE_NAME_INFO2       0x3f1 /* 0x30 bytes */
@@ -1363,6 +1364,7 @@
 #define SMB_SET_XATTR                   0x205
 #define SMB_SET_ATTR_FLAGS              0x206  /* append, immutable etc. */
 #define SMB_SET_POSIX_LOCK              0x208
+#define SMB_POSIX_OPEN                  0x209
 #define SMB_SET_FILE_BASIC_INFO2        0x3ec
 #define SMB_SET_FILE_RENAME_INFORMATION 0x3f2 /* BB check if qpathinfo level too */
 #define SMB_FILE_ALL_INFO2              0x3fa