staging: lustre: lmv: assume a real connection in lmv_connect()

Assume a real connection in lmv_connect(). Mark OBD_CONNECT_REAL
obsolete. Remove the then unnecessary refcount and exp members of
struct lmv_obd. Remove calls to lmv_check_connect(). Disconnect the
export in the appropriate error path of lmv_connect().
Signed-off-by: John L. Hammond <john.hammond@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-7669
Reviewed-on: http://review.whamcloud.com/18018Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: wangdi <di.wang@intel.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

@@ -1122,7 +1122,7 @@ struct ptlrpc_body_v2 {
 #define OBD_CONNECT_AT		    0x1000000ULL /*client uses AT */
 #define OBD_CONNECT_LRU_RESIZE      0x2000000ULL /*LRU resize feature. */
 #define OBD_CONNECT_MDS_MDS	    0x4000000ULL /*MDS-MDS connection */
-#define OBD_CONNECT_REAL	    0x8000000ULL /*real connection */
+#define OBD_CONNECT_REAL	    0x8000000ULL /* obsolete since 2.8 */
 #define OBD_CONNECT_CHANGE_QS      0x10000000ULL /*Not used since 2.4 */
 #define OBD_CONNECT_CKSUM	   0x20000000ULL /*support several cksum algos*/
 #define OBD_CONNECT_FID		   0x40000000ULL /*FID is supported by server */

drivers/staging/lustre/lustre/include/obd.h

@@ -404,12 +404,10 @@ struct lmv_tgt_desc {
 };
 
 struct lmv_obd {
-	int			refcount;
 	struct lu_client_fld	lmv_fld;
 	spinlock_t		lmv_lock;
 	struct lmv_desc		desc;
 	struct obd_uuid		cluuid;
-	struct obd_export	*exp;
 
 	struct mutex		lmv_init_mutex;
 	int			connected;

drivers/staging/lustre/lustre/llite/llite_lib.c

@@ -222,9 +222,6 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 	else
 		sbi->ll_fop = &ll_file_operations_noflock;
 
-	/* real client */
-	data->ocd_connect_flags |= OBD_CONNECT_REAL;
-
 	/* always ping even if server suppress_pings */
 	if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
 		data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;

drivers/staging/lustre/lustre/lmv/lmv_intent.c

@@ -474,7 +474,6 @@ int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
 		    ldlm_blocking_callback cb_blocking,
 		    __u64 extra_lock_flags)
 {
-	struct obd_device *obd = exp->exp_obd;
 	int		rc;
 
 	LASSERT(fid_is_sane(&op_data->op_fid1));
@@ -484,10 +483,6 @@ int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
 	       (int)op_data->op_namelen, op_data->op_name,
 	       PFID(&op_data->op_fid1));
 
-	rc = lmv_check_connect(obd);
-	if (rc)
-		return rc;
-
 	if (it->it_op & (IT_LOOKUP | IT_GETATTR | IT_LAYOUT))
 		rc = lmv_intent_lookup(exp, op_data, it, reqp, cb_blocking,
 				       extra_lock_flags);

drivers/staging/lustre/lustre/lmv/lmv_internal.h

@@ -42,8 +42,6 @@
 #define LL_IT2STR(it)					\
 	((it) ? ldlm_it2str((it)->it_op) : "0")
 
-int lmv_check_connect(struct obd_device *obd);
-
 int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
 		    struct lookup_intent *it, struct ptlrpc_request **reqp,
 		    ldlm_blocking_callback cb_blocking,