Compute the total number of bytes transferred for an image request--the sum across each of the request's object requests. To avoid contention do it only when all object requests are complete, in rbd_img_request_complete().
Signed-off-by: Alex Elder <[email protected]> --- drivers/block/rbd.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 69eab66..e8374ae 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; + u64 xferred;/* aggregate bytes transferred */ int result; /* first nonzero obj_request result */ u32 obj_request_count; @@ -1148,7 +1149,24 @@ static int rbd_obj_request_submit(struct ceph_osd_client *osdc, static void rbd_img_request_complete(struct rbd_img_request *img_request) { + dout("%s: img %p\n", __func__, img_request); + + /* + * If no error occurred, compute the aggregate transfer + * count for the image request. We could instead use + * atomic64_cmpxchg() to update it as each object request + * completes; not clear which way is better off hand. + */ + if (!img_request->result) { + struct rbd_obj_request *obj_request; + u64 xferred = 0; + + for_each_obj_request(img_request, obj_request) + xferred += obj_request->xferred; + img_request->xferred = xferred; + } + if (img_request->callback) img_request->callback(img_request); else -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
