diff options
| author | Ilya Dryomov <idryomov@gmail.com> | 2016-09-13 21:08:10 +0200 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2016-10-03 16:13:47 +0200 |
| commit | 4a17dadcae55ca1f5c1ed826d42185e22653c256 (patch) | |
| tree | 06b25176db3e0a4675dfa5c94f5d63a310515008 /drivers/block | |
| parent | c2e82414884718ad6ec33a7528606cb07cf55cb4 (diff) | |
| download | linux-4a17dadcae55ca1f5c1ed826d42185e22653c256.tar.gz linux-4a17dadcae55ca1f5c1ed826d42185e22653c256.tar.bz2 linux-4a17dadcae55ca1f5c1ed826d42185e22653c256.zip | |
rbd: move bumping img_request refcount into rbd_obj_request_submit()
Commit 0f2d5be792b0 ("rbd: use reference counts for image requests")
added rbd_img_request_get(), which rbd_img_request_fill() calls for
each obj_request added to img_request. It was an urgent band-aid for
the uglyness that is rbd_img_obj_callback() and none of the error paths
were updated.
Given that this img_request reference is meant to represent an
obj_request that hasn't passed through rbd_img_obj_callback() yet,
proper cleanup in appropriate destructors is a challenge. However,
noting that if we don't get a chance to call rbd_obj_request_complete(),
there is not going to be a call to rbd_img_obj_callback(), we can move
rbd_img_request_get() into rbd_obj_request_submit() and fixup the two
places that call rbd_obj_request_complete() directly and not through
rbd_obj_request_submit() to temporarily bump img_request, so that
rbd_img_obj_callback() can put as usual.
This takes care of img_request leaks on errors on the submit side.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/rbd.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 5e55d1c98471..6db12d9a4291 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -1618,11 +1618,17 @@ static bool obj_request_type_valid(enum obj_request_type type) } } +static void rbd_img_obj_callback(struct rbd_obj_request *obj_request); + static void rbd_obj_request_submit(struct rbd_obj_request *obj_request) { struct ceph_osd_request *osd_req = obj_request->osd_req; dout("%s %p osd_req %p\n", __func__, obj_request, osd_req); + if (obj_request_img_data_test(obj_request)) { + WARN_ON(obj_request->callback != rbd_img_obj_callback); + rbd_img_request_get(obj_request->img_request); + } ceph_osdc_start_request(osd_req->r_osdc, osd_req, false); } @@ -2588,8 +2594,6 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request, rbd_img_obj_request_fill(obj_request, osd_req, op_type, 0); - rbd_img_request_get(img_request); - img_offset += length; resid -= length; } @@ -2723,10 +2727,9 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request) return; out_err: - /* Record the error code and complete the request */ - orig_request->result = img_result; orig_request->xferred = 0; + rbd_img_request_get(orig_request->img_request); obj_request_done_set(orig_request); rbd_obj_request_complete(orig_request); } @@ -2881,6 +2884,7 @@ static void rbd_img_obj_exists_callback(struct rbd_obj_request *obj_request) fail_orig_request: orig_request->result = result; orig_request->xferred = 0; + rbd_img_request_get(orig_request->img_request); obj_request_done_set(orig_request); rbd_obj_request_complete(orig_request); } |