From 25dcf954c3230946b5f3e18db9f91d7640eff76e Mon Sep 17 00:00:00 2001 From: Alex Elder Date: Fri, 25 Jan 2013 17:08:55 -0600 Subject: [PATCH] rbd: decrement obj request count when deleting Decrement the obj_request_count value when deleting an object request from its image request's list. Rearrange a few lines in the surrounding code. This resolves: http://tracker.ceph.com/issues/3940 Signed-off-by: Alex Elder Reviewed-by: Josh Durgin --- drivers/block/rbd.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index fc1a045cee4d..d3d15d06abc0 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -1063,22 +1063,29 @@ static void rbd_img_request_put(struct rbd_img_request *img_request) static inline void rbd_img_obj_request_add(struct rbd_img_request *img_request, struct rbd_obj_request *obj_request) { + rbd_assert(obj_request->img_request == NULL); + rbd_obj_request_get(obj_request); obj_request->img_request = img_request; - list_add_tail(&obj_request->links, &img_request->obj_requests); - obj_request->which = img_request->obj_request_count++; + obj_request->which = img_request->obj_request_count; rbd_assert(obj_request->which != BAD_WHICH); + img_request->obj_request_count++; + list_add_tail(&obj_request->links, &img_request->obj_requests); } static inline void rbd_img_obj_request_del(struct rbd_img_request *img_request, struct rbd_obj_request *obj_request) { rbd_assert(obj_request->which != BAD_WHICH); - obj_request->which = BAD_WHICH; + list_del(&obj_request->links); + rbd_assert(img_request->obj_request_count > 0); + img_request->obj_request_count--; + rbd_assert(obj_request->which == img_request->obj_request_count); + obj_request->which = BAD_WHICH; rbd_assert(obj_request->img_request == img_request); - obj_request->callback = NULL; obj_request->img_request = NULL; + obj_request->callback = NULL; rbd_obj_request_put(obj_request); } @@ -1472,6 +1479,7 @@ static void rbd_img_request_destroy(struct kref *kref) for_each_obj_request_safe(img_request, obj_request, next_obj_request) rbd_img_obj_request_del(img_request, obj_request); + rbd_assert(img_request->obj_request_count == 0); if (img_request->write_request) ceph_put_snap_context(img_request->snapc); -- 2.20.1