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authorAlex Elder <elder@inktank.com>2013-01-24 16:13:36 -0600
committerSage Weil <sage@inktank.com>2013-05-01 21:18:37 -0700
commita5a337d4382dfe0f9e9e072e7d3eaad8e05e4b0b (patch)
tree5683b236830708689357809ef97c18ff8dde9124
parent5cbf6f12c48121199cc214c93dea98cce719343b (diff)
rbd: record overall image request result
If any image object request produces a non-zero result, preserve that as the result of the overall image request. If multiple objects have non-zero results, save only the first one. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
-rw-r--r--drivers/block/rbd.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 503e64f51fe..69eab66b6c6 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -214,6 +214,7 @@ struct rbd_img_request {
spinlock_t completion_lock;/* protects next_completion */
u32 next_completion;
rbd_img_callback_t callback;
+ int result; /* first nonzero obj_request result */
u32 obj_request_count;
struct list_head obj_requests; /* rbd_obj_request structs */
@@ -1488,6 +1489,7 @@ static struct rbd_img_request *rbd_img_request_create(
spin_lock_init(&img_request->completion_lock);
img_request->next_completion = 0;
img_request->callback = NULL;
+ img_request->result = 0;
img_request->obj_request_count = 0;
INIT_LIST_HEAD(&img_request->obj_requests);
kref_init(&img_request->kref);
@@ -1552,13 +1554,16 @@ static void rbd_img_obj_callback(struct rbd_obj_request *obj_request)
if (!obj_request_done_test(obj_request))
break;
- rbd_assert(obj_request->xferred <= (u64) UINT_MAX);
- xferred = (unsigned int) obj_request->xferred;
- result = (int) obj_request->result;
- if (result)
+ rbd_assert(obj_request->xferred <= (u64)UINT_MAX);
+ xferred = (unsigned int)obj_request->xferred;
+ result = obj_request->result;
+ if (result) {
rbd_warn(NULL, "obj_request %s result %d xferred %u\n",
img_request->write_request ? "write" : "read",
result, xferred);
+ if (!img_request->result)
+ img_request->result = result;
+ }
more = blk_end_request(img_request->rq, result, xferred);
which++;