X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Ftdb2%2Flock.c;h=957adf83358057d458d09320d1ce546feb62bffe;hp=49313a5419cb7b83b7f672aaff32f5942ddf079b;hb=b87e14495d5b07e1b247218a72329f10ecb3da7f;hpb=f6900d2358ca0ec2f2dc776b9e42e4fca7bffbdf

diff --git a/ccan/tdb2/lock.c b/ccan/tdb2/lock.c
index 49313a54..957adf83 100644
--- a/ccan/tdb2/lock.c
+++ b/ccan/tdb2/lock.c
@@ -99,16 +99,21 @@ int tdb_fcntl_unlock(int fd, int rw, off_t off, off_t len, void *unused)
 static int lock(struct tdb_context *tdb,
 		      int rw, off_t off, off_t len, bool waitflag)
 {
+	int ret;
 	if (tdb->file->allrecord_lock.count == 0
 	    && tdb->file->num_lockrecs == 0) {
 		tdb->file->locker = getpid();
 	}
 
 	tdb->stats.lock_lowlevel++;
-	if (!waitflag)
+	ret = tdb->lock_fn(tdb->file->fd, rw, off, len, waitflag,
+			   tdb->lock_data);
+	if (!waitflag) {
 		tdb->stats.lock_nonblock++;
-	return tdb->lock_fn(tdb->file->fd, rw, off, len, waitflag,
-			    tdb->lock_data);
+		if (ret != 0)
+			tdb->stats.lock_nonblock_fail++;
+	}
+	return ret;
 }
 
 static int unlock(struct tdb_context *tdb, int rw, off_t off, off_t len)
@@ -189,7 +194,7 @@ static enum TDB_ERROR tdb_brlock(struct tdb_context *tdb,
 		return TDB_SUCCESS;
 	}
 
-	if (rw_type == F_WRLCK && tdb->read_only) {
+	if (rw_type == F_WRLCK && (tdb->flags & TDB_RDONLY)) {
 		return tdb_logerr(tdb, TDB_ERR_RDONLY, TDB_LOG_USE_ERROR,
 				  "Write lock attempted on read-only database");
 	}
@@ -323,13 +328,13 @@ enum TDB_ERROR tdb_lock_and_recover(struct tdb_context *tdb)
 		return ecode;
 	}
 
-	ecode = tdb_lock_open(tdb, TDB_LOCK_WAIT|TDB_LOCK_NOCHECK);
+	ecode = tdb_lock_open(tdb, F_WRLCK, TDB_LOCK_WAIT|TDB_LOCK_NOCHECK);
 	if (ecode != TDB_SUCCESS) {
 		tdb_allrecord_unlock(tdb, F_WRLCK);
 		return ecode;
 	}
 	ecode = tdb_transaction_recover(tdb);
-	tdb_unlock_open(tdb);
+	tdb_unlock_open(tdb, F_WRLCK);
 	tdb_allrecord_unlock(tdb, F_WRLCK);
 
 	return ecode;
@@ -503,8 +508,9 @@ static enum TDB_ERROR tdb_lock_gradual(struct tdb_context *tdb,
 	}
 
 	/* First we try non-blocking. */
-	if (tdb_brlock(tdb, ltype, off, len, nb_flags) == TDB_SUCCESS) {
-		return TDB_SUCCESS;
+	ecode = tdb_brlock(tdb, ltype, off, len, nb_flags);
+	if (ecode != TDB_ERR_LOCK) {
+		return ecode;
 	}
 
 	/* Try locking first half, then second. */
@@ -610,14 +616,15 @@ again:
 	goto again;
 }
 
-enum TDB_ERROR tdb_lock_open(struct tdb_context *tdb, enum tdb_lock_flags flags)
+enum TDB_ERROR tdb_lock_open(struct tdb_context *tdb,
+			     int ltype, enum tdb_lock_flags flags)
 {
-	return tdb_nest_lock(tdb, TDB_OPEN_LOCK, F_WRLCK, flags);
+	return tdb_nest_lock(tdb, TDB_OPEN_LOCK, ltype, flags);
 }
 
-void tdb_unlock_open(struct tdb_context *tdb)
+void tdb_unlock_open(struct tdb_context *tdb, int ltype)
 {
-	tdb_nest_unlock(tdb, TDB_OPEN_LOCK, F_WRLCK);
+	tdb_nest_unlock(tdb, TDB_OPEN_LOCK, ltype);
 }
 
 bool tdb_has_open_lock(struct tdb_context *tdb)