[sheepdog] [PATCH 1/2] sockfd cache: fix a wrong type of read/write lock

[Liu Yuan]

From: Liu Yuan <tailai.ly at taobao.com>

We should use write lock for sockfd_cache_add() because it changes the
node red-black tree state.

Signed-off-by: Liu Yuan <tailai.ly at taobao.com>
---
 sheep/sockfd_cache.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sheep/sockfd_cache.c b/sheep/sockfd_cache.c
index 137bbe4..33e780b 100644
--- a/sheep/sockfd_cache.c
+++ b/sheep/sockfd_cache.c
@@ -265,7 +265,7 @@ void sockfd_cache_add(const struct node_id *nid)
 	char name[INET6_ADDRSTRLEN];
 	int n, i;
 
-	pthread_rwlock_rdlock(&sockfd_cache.lock);
+	pthread_rwlock_wrlock(&sockfd_cache.lock);
 	new = xmalloc(sizeof(*new));
 	new->fds = xzalloc(sizeof(struct sockfd_cache_fd) * fds_count);
 	for (i = 0; i < fds_count; i++)
-- 
1.7.9.5