[sheepdog] [PATCH v1 3/4] sheep/cluster: let local implementation of lock() support embedding

[Robin Dong]

From: Robin Dong <sanbai at taobao.com>

In kv_create_object(), we need to lock bucket and then lock allocator of it, so
all the implementations for ->lock() in cluster must support embeded lock.

Signed-off-by: Robin Dong <sanbai at taobao.com>
---
 sheep/cluster/local.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sheep/cluster/local.c b/sheep/cluster/local.c
index 7f9a6eb..264afdb 100644
--- a/sheep/cluster/local.c
+++ b/sheep/cluster/local.c
@@ -627,12 +627,15 @@ static void local_lock(uint64_t lock_id)
 
 	if (xflock(entry->fd, LOCK_EX) < 0)
 		panic("lock failed %"PRIx64", %m", lock_id);
+
+	sd_rw_unlock(&lock_tree_lock);
 }
 
 static void local_unlock(uint64_t lock_id)
 {
 	struct lock_entry *entry;
 
+	sd_write_lock(&lock_tree_lock);
 	entry = lock_tree_lookup(lock_id);
 	if (!entry)
 		panic("can't find fd for lock %"PRIx64, lock_id);
-- 
1.7.12.4