From: Rusty Russell <rusty@rustcorp.com.au>
Date: Thu, 22 Apr 2010 04:24:05 +0000 (+0930)
Subject: tdb: use tdb_nest_lock() for seqnum lock.
X-Git-Tag: ctdb-1.9.1~85^2~21
X-Git-Url: http://git.samba.org/?p=sahlberg%2Fctdb.git;a=commitdiff_plain;h=2e8512403525c14c9b776ce28891d09c17ada91d

tdb: use tdb_nest_lock() for seqnum lock.

This is pure overhead, but it centralizes the locking.  Realloc (esp. as
most implementations are lazy) is fast compared to the fnctl anyway.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

(Imported from commit d48c3e4982a38fb6b568ed3903e55e07a0fe5ca6)
---

diff --git a/lib/tdb/common/tdb.c b/lib/tdb/common/tdb.c
index ad81a568..7317a3aa 100644
--- a/lib/tdb/common/tdb.c
+++ b/lib/tdb/common/tdb.c
@@ -59,14 +59,14 @@ static void tdb_increment_seqnum(struct tdb_context *tdb)
 		return;
 	}
 
-	if (tdb_brlock(tdb, F_WRLCK, TDB_SEQNUM_OFS, 1,
-		       TDB_LOCK_WAIT|TDB_LOCK_PROBE) != 0) {
+	if (tdb_nest_lock(tdb, TDB_SEQNUM_OFS, F_WRLCK,
+			  TDB_LOCK_WAIT|TDB_LOCK_PROBE) != 0) {
 		return;
 	}
 
 	tdb_increment_seqnum_nonblock(tdb);
 
-	tdb_brunlock(tdb, F_WRLCK, TDB_SEQNUM_OFS, 1);
+	tdb_nest_unlock(tdb, TDB_SEQNUM_OFS, F_WRLCK, false);
 }
 
 static int tdb_key_compare(TDB_DATA key, TDB_DATA data, void *private_data)