staging: lustre: obd: reserve connection flag OBD_CONNECT_SUBTREE

The connection flag OBD_CONNECT_SUBTREE will be used for the
following the patch: LU-28 mounting of filesystem from MDS
http://review.whamcloud.com/5007

Land the connection flags to master earlier for reserving the
slot to avoid potential conflict with others.
Signed-off-by: NFan Yong <fan.yong@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-7543
Reviewed-on: http://review.whamcloud.com/17644Reviewed-by: NAndreas Dilger <andreas.dilger@intel.com>
Reviewed-by: NPatrick Farrell <paf@cray.com>
Signed-off-by: NJames Simmons <jsimmons@infradead.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/include/lustre/lustre_idl.h

@@ -1189,6 +1189,7 @@ void lustre_swab_ptlrpc_body(struct ptlrpc_body *pb);
 						       *  RPCs in parallel
 						       */
 #define OBD_CONNECT_DIR_STRIPE	 0x400000000000000ULL/* striped DNE dir */
+#define OBD_CONNECT_SUBTREE	 0x800000000000000ULL /* fileset mount */
 /** bulk matchbits is sent within ptlrpc_body */
 #define OBD_CONNECT_BULK_MBITS	 0x2000000000000000ULL
 

drivers/staging/lustre/lustre/obdclass/lprocfs_status.c

@@ -102,6 +102,7 @@ static const char * const obd_connect_names[] = {
 	"unlink_close",
 	"multi_mod_rpcs",
 	"dir_stripe",
+	"subtree",
 	"bulk_mbits",
 	"unknown",
 	NULL

drivers/staging/lustre/lustre/ptlrpc/wiretest.c

@@ -1105,6 +1105,8 @@ void lustre_assert_wire_constants(void)
 		 OBD_CONNECT_MULTIMODRPCS);
 	LASSERTF(OBD_CONNECT_DIR_STRIPE == 0x400000000000000ULL, "found 0x%.16llxULL\n",
 		 OBD_CONNECT_DIR_STRIPE);
+	LASSERTF(OBD_CONNECT_SUBTREE == 0x800000000000000ULL, "found 0x%.16llxULL\n",
+		 OBD_CONNECT_SUBTREE);
 	LASSERTF(OBD_CKSUM_CRC32 == 0x00000001UL, "found 0x%.8xUL\n",
 		 (unsigned)OBD_CKSUM_CRC32);
 	LASSERTF(OBD_CKSUM_ADLER == 0x00000002UL, "found 0x%.8xUL\n",