staging: lustre: obd: reserve connection flag OBD_CONNECT_LOCK_AHEAD

The connection flag OBD_CONNECT_LOCK_AHEAD will be used for the
following the patch: LU-6917 LDLM lock ahead
http://review.whamcloud.com/13564

Land the connection flags to upstream client earlier for reserving
the slot to avoid potential conflict with others.

Signed-off-by: Fan Yong <fan.yong@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-7543
Reviewed-on: http://review.whamcloud.com/17645
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Patrick Farrell <paf@cray.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

@@ -1190,6 +1190,7 @@ void lustre_swab_ptlrpc_body(struct ptlrpc_body *pb);
 						       */
 #define OBD_CONNECT_DIR_STRIPE	 0x400000000000000ULL/* striped DNE dir */
 #define OBD_CONNECT_SUBTREE	 0x800000000000000ULL /* fileset mount */
+#define OBD_CONNECT_LOCK_AHEAD	 0x1000000000000000ULL /* lock ahead */
 /** bulk matchbits is sent within ptlrpc_body */
 #define OBD_CONNECT_BULK_MBITS	 0x2000000000000000ULL
 

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

@@ -103,6 +103,7 @@ static const char * const obd_connect_names[] = {
 	"multi_mod_rpcs",
 	"dir_stripe",
 	"subtree",
+	"lock_ahead",
 	"bulk_mbits",
 	"unknown",
 	NULL

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

@@ -1107,6 +1107,8 @@ void lustre_assert_wire_constants(void)
 		 OBD_CONNECT_DIR_STRIPE);
 	LASSERTF(OBD_CONNECT_SUBTREE == 0x800000000000000ULL, "found 0x%.16llxULL\n",
 		 OBD_CONNECT_SUBTREE);
+	LASSERTF(OBD_CONNECT_LOCK_AHEAD == 0x1000000000000000ULL, "found 0x%.16llxULL\n",
+		 OBD_CONNECT_LOCK_AHEAD);
 	LASSERTF(OBD_CKSUM_CRC32 == 0x00000001UL, "found 0x%.8xUL\n",
 		 (unsigned)OBD_CKSUM_CRC32);
 	LASSERTF(OBD_CKSUM_ADLER == 0x00000002UL, "found 0x%.8xUL\n",