[Sheepdog] [PATCH] sheep: bypass check_request() for cached object

[Liu Yuan]

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

if we go for a cached object, we don't care if it is busy
or being recovered.

Signed-off-by: Liu Yuan <tailai.ly at taobao.com>
---
 sheep/sdnet.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/sheep/sdnet.c b/sheep/sdnet.c
index a28874e..1e001af 100644
--- a/sheep/sdnet.c
+++ b/sheep/sdnet.c
@@ -208,6 +208,15 @@ static int check_epoch(struct request *req)
 
 static int check_request(struct request *req)
 {
+	struct sd_obj_req *hdr = (struct sd_obj_req *)&req->rq;
+
+	/*
+	 * if we go for a cached object, we don't care if it is busy
+	 * or being recovered.
+	 */
+	if ((hdr->flags & SD_FLAG_CMD_CACHE) && object_is_cached(hdr->oid))
+		return 0;
+
 	if (!req->local_oid && !req->local_cow_oid)
 		return 0;
 	else {
-- 
1.7.8.2