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Commit 8d400b81 authored by Sunil Mushran's avatar Sunil Mushran
Browse files

ocfs2/dlm: Clean up refmap helpers 



Patch cleans up helpers that set/clear refmap bits and grab/drop inflight lock
ref counts.

Signed-off-by: default avatarSunil Mushran <sunil.mushran@oracle.com>
parent 0afbba13

fs/ocfs2/dlm/dlmcommon.h

+9 −40
Original line number Diff line number Diff line
@@ -902,46 +902,15 @@ struct dlm_lock_resource *dlm_new_lockres(struct dlm_ctxt *dlm, 
					  const char *name,

					  unsigned int namelen);



#define dlm_lockres_set_refmap_bit(bit,res)  \

	__dlm_lockres_set_refmap_bit(bit,res,__FILE__,__LINE__)

#define dlm_lockres_clear_refmap_bit(bit,res)  \

	__dlm_lockres_clear_refmap_bit(bit,res,__FILE__,__LINE__)

void dlm_lockres_set_refmap_bit(struct dlm_ctxt *dlm,

				struct dlm_lock_resource *res, int bit);

void dlm_lockres_clear_refmap_bit(struct dlm_ctxt *dlm,

				  struct dlm_lock_resource *res, int bit);



static inline void __dlm_lockres_set_refmap_bit(int bit,

						struct dlm_lock_resource *res,

						const char *file,

						int line)

{

	//printk("%s:%d:%.*s: setting bit %d\n", file, line,

	//     res->lockname.len, res->lockname.name, bit);

	set_bit(bit, res->refmap);

}



static inline void __dlm_lockres_clear_refmap_bit(int bit,

						  struct dlm_lock_resource *res,

						  const char *file,

						  int line)

{

	//printk("%s:%d:%.*s: clearing bit %d\n", file, line,

	//     res->lockname.len, res->lockname.name, bit);

	clear_bit(bit, res->refmap);

}



void __dlm_lockres_drop_inflight_ref(struct dlm_ctxt *dlm,

				   struct dlm_lock_resource *res,

				   const char *file,

				   int line);

void __dlm_lockres_grab_inflight_ref(struct dlm_ctxt *dlm,

				   struct dlm_lock_resource *res,

				   int new_lockres,

				   const char *file,

				   int line);

#define dlm_lockres_drop_inflight_ref(d,r)  \

	__dlm_lockres_drop_inflight_ref(d,r,__FILE__,__LINE__)

#define dlm_lockres_grab_inflight_ref(d,r)  \

	__dlm_lockres_grab_inflight_ref(d,r,0,__FILE__,__LINE__)

#define dlm_lockres_grab_inflight_ref_new(d,r)  \

	__dlm_lockres_grab_inflight_ref(d,r,1,__FILE__,__LINE__)

void dlm_lockres_drop_inflight_ref(struct dlm_ctxt *dlm,

				   struct dlm_lock_resource *res);

void dlm_lockres_grab_inflight_ref(struct dlm_ctxt *dlm,

				   struct dlm_lock_resource *res);



void dlm_queue_ast(struct dlm_ctxt *dlm, struct dlm_lock *lock);

void dlm_queue_bast(struct dlm_ctxt *dlm, struct dlm_lock *lock);

fs/ocfs2/dlm/dlmmaster.c

+53 −35
Original line number Diff line number Diff line
@@ -631,39 +631,58 @@ struct dlm_lock_resource *dlm_new_lockres(struct dlm_ctxt *dlm, 
	return NULL;

}



void __dlm_lockres_grab_inflight_ref(struct dlm_ctxt *dlm,

				   struct dlm_lock_resource *res,

				   int new_lockres,

				   const char *file,

				   int line)

void dlm_lockres_set_refmap_bit(struct dlm_ctxt *dlm,

				struct dlm_lock_resource *res, int bit)

{

	assert_spin_locked(&res->spinlock);



	mlog(0, "res %.*s, set node %u, %ps()\n", res->lockname.len,

	     res->lockname.name, bit, __builtin_return_address(0));



	set_bit(bit, res->refmap);

}



void dlm_lockres_clear_refmap_bit(struct dlm_ctxt *dlm,

				  struct dlm_lock_resource *res, int bit)

{

	assert_spin_locked(&res->spinlock);



	mlog(0, "res %.*s, clr node %u, %ps()\n", res->lockname.len,

	     res->lockname.name, bit, __builtin_return_address(0));



	clear_bit(bit, res->refmap);

}





void dlm_lockres_grab_inflight_ref(struct dlm_ctxt *dlm,

				   struct dlm_lock_resource *res)

{

	if (!new_lockres)

	assert_spin_locked(&res->spinlock);



	if (!test_bit(dlm->node_num, res->refmap)) {

		BUG_ON(res->inflight_locks != 0);

		dlm_lockres_set_refmap_bit(dlm->node_num, res);

		dlm_lockres_set_refmap_bit(dlm, res, dlm->node_num);

	}

	res->inflight_locks++;

	mlog(0, "%s:%.*s: inflight++: now %u\n",

	     dlm->name, res->lockname.len, res->lockname.name,

	     res->inflight_locks);

	mlog(0, "%s: res %.*s, inflight++: now %u, %ps()\n", dlm->name,

	     res->lockname.len, res->lockname.name, res->inflight_locks,

	     __builtin_return_address(0));

}



void __dlm_lockres_drop_inflight_ref(struct dlm_ctxt *dlm,

				   struct dlm_lock_resource *res,

				   const char *file,

				   int line)

void dlm_lockres_drop_inflight_ref(struct dlm_ctxt *dlm,

				   struct dlm_lock_resource *res)

{

	assert_spin_locked(&res->spinlock);



	BUG_ON(res->inflight_locks == 0);



	res->inflight_locks--;

	mlog(0, "%s:%.*s: inflight--: now %u\n",

	     dlm->name, res->lockname.len, res->lockname.name,

	     res->inflight_locks);

	mlog(0, "%s: res %.*s, inflight--: now %u, %ps()\n", dlm->name,

	     res->lockname.len, res->lockname.name, res->inflight_locks,

	     __builtin_return_address(0));



	if (res->inflight_locks == 0)

		dlm_lockres_clear_refmap_bit(dlm->node_num, res);

		dlm_lockres_clear_refmap_bit(dlm, res, dlm->node_num);

	wake_up(&res->wq);

}
@@ -843,8 +862,10 @@ struct dlm_lock_resource * dlm_get_lock_resource(struct dlm_ctxt *dlm, 


	/* finally add the lockres to its hash bucket */

	__dlm_insert_lockres(dlm, res);

	/* since this lockres is new it doesn't not require the spinlock */

	dlm_lockres_grab_inflight_ref_new(dlm, res);



	spin_lock(&res->spinlock);

	dlm_lockres_grab_inflight_ref(dlm, res);

	spin_unlock(&res->spinlock);



	/* if this node does not become the master make sure to drop

	 * this inflight reference below */
@@ -1426,9 +1447,7 @@ int dlm_master_request_handler(struct o2net_msg *msg, u32 len, void *data, 
		}



		if (res->owner == dlm->node_num) {

			mlog(0, "%s:%.*s: setting bit %u in refmap\n",

			     dlm->name, namelen, name, request->node_idx);

			dlm_lockres_set_refmap_bit(request->node_idx, res);

			dlm_lockres_set_refmap_bit(dlm, res, request->node_idx);

			spin_unlock(&res->spinlock);

			response = DLM_MASTER_RESP_YES;

			if (mle)
@@ -1493,9 +1512,7 @@ int dlm_master_request_handler(struct o2net_msg *msg, u32 len, void *data, 
				 * go back and clean the mles on any

				 * other nodes */

				dispatch_assert = 1;

				dlm_lockres_set_refmap_bit(request->node_idx, res);

				mlog(0, "%s:%.*s: setting bit %u in refmap\n",

				     dlm->name, namelen, name,

				dlm_lockres_set_refmap_bit(dlm, res,

							   request->node_idx);

			} else

				response = DLM_MASTER_RESP_NO;
@@ -1702,7 +1719,7 @@ static int dlm_do_assert_master(struct dlm_ctxt *dlm, 
			     "lockres, set the bit in the refmap\n",

			     namelen, lockname, to);

			spin_lock(&res->spinlock);

			dlm_lockres_set_refmap_bit(to, res);

			dlm_lockres_set_refmap_bit(dlm, res, to);

			spin_unlock(&res->spinlock);

		}

	}
@@ -2256,7 +2273,7 @@ int dlm_deref_lockres_handler(struct o2net_msg *msg, u32 len, void *data, 
	else {

		BUG_ON(res->state & DLM_LOCK_RES_DROPPING_REF);

		if (test_bit(node, res->refmap)) {

			dlm_lockres_clear_refmap_bit(node, res);

			dlm_lockres_clear_refmap_bit(dlm, res, node);

			cleared = 1;

		}

	}
@@ -2316,7 +2333,7 @@ static void dlm_deref_lockres_worker(struct dlm_work_item *item, void *data) 
	BUG_ON(res->state & DLM_LOCK_RES_DROPPING_REF);

	if (test_bit(node, res->refmap)) {

		__dlm_wait_on_lockres_flags(res, DLM_LOCK_RES_SETREF_INPROG);

		dlm_lockres_clear_refmap_bit(node, res);

		dlm_lockres_clear_refmap_bit(dlm, res, node);

		cleared = 1;

	}

	spin_unlock(&res->spinlock);
@@ -2798,7 +2815,8 @@ static void dlm_remove_nonlocal_locks(struct dlm_ctxt *dlm, 
				BUG_ON(!list_empty(&lock->bast_list));

				BUG_ON(lock->ast_pending);

				BUG_ON(lock->bast_pending);

				dlm_lockres_clear_refmap_bit(lock->ml.node, res);

				dlm_lockres_clear_refmap_bit(dlm, res,

							     lock->ml.node);

				list_del_init(&lock->list);

				dlm_lock_put(lock);

				/* In a normal unlock, we would have added a
@@ -2819,7 +2837,7 @@ static void dlm_remove_nonlocal_locks(struct dlm_ctxt *dlm, 
			mlog(0, "%s:%.*s: node %u had a ref to this "

			     "migrating lockres, clearing\n", dlm->name,

			     res->lockname.len, res->lockname.name, bit);

			dlm_lockres_clear_refmap_bit(bit, res);

			dlm_lockres_clear_refmap_bit(dlm, res, bit);

		}

		bit++;

	}
@@ -2933,7 +2951,7 @@ static int dlm_do_migrate_request(struct dlm_ctxt *dlm, 
			     dlm->name, res->lockname.len, res->lockname.name,

			     nodenum);

			spin_lock(&res->spinlock);

			dlm_lockres_set_refmap_bit(nodenum, res);

			dlm_lockres_set_refmap_bit(dlm, res, nodenum);

			spin_unlock(&res->spinlock);

		}

	}
@@ -3267,7 +3285,7 @@ int dlm_finish_migration(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, 
	 * mastery reference here since old_master will briefly have

	 * a reference after the migration completes */

	spin_lock(&res->spinlock);

	dlm_lockres_set_refmap_bit(old_master, res);

	dlm_lockres_set_refmap_bit(dlm, res, old_master);

	spin_unlock(&res->spinlock);



	mlog(0, "now time to do a migrate request to other nodes\n");

fs/ocfs2/dlm/dlmrecovery.c

+4 −4
Original line number Diff line number Diff line
@@ -1776,7 +1776,7 @@ static int dlm_process_recovery_data(struct dlm_ctxt *dlm, 
			     dlm->name, mres->lockname_len, mres->lockname,

			     from);

			spin_lock(&res->spinlock);

			dlm_lockres_set_refmap_bit(from, res);

			dlm_lockres_set_refmap_bit(dlm, res, from);

			spin_unlock(&res->spinlock);

			added++;

			break;
@@ -1974,7 +1974,7 @@ static int dlm_process_recovery_data(struct dlm_ctxt *dlm, 
			mlog(0, "%s:%.*s: added lock for node %u, "

			     "setting refmap bit\n", dlm->name,

			     res->lockname.len, res->lockname.name, ml->node);

			dlm_lockres_set_refmap_bit(ml->node, res);

			dlm_lockres_set_refmap_bit(dlm, res, ml->node);

			added++;

		}

		spin_unlock(&res->spinlock);
@@ -2254,12 +2254,12 @@ static void dlm_free_dead_locks(struct dlm_ctxt *dlm, 
			     res->lockname.len, res->lockname.name, freed, dead_node);

			__dlm_print_one_lock_resource(res);

		}

		dlm_lockres_clear_refmap_bit(dead_node, res);

		dlm_lockres_clear_refmap_bit(dlm, res, dead_node);

	} else if (test_bit(dead_node, res->refmap)) {

		mlog(0, "%s:%.*s: dead node %u had a ref, but had "

		     "no locks and had not purged before dying\n", dlm->name,

		     res->lockname.len, res->lockname.name, dead_node);

		dlm_lockres_clear_refmap_bit(dead_node, res);

		dlm_lockres_clear_refmap_bit(dlm, res, dead_node);

	}



	/* do not kick thread yet */