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rbd: mark the original request as done if stat request fails 

If stat request fails with something other than -ENOENT (which just
means that we need to copyup), the original object request is never
marked as done and therefore never completed.  Fix this by moving the
mark done + complete snippet from rbd_img_obj_parent_read_full() into
rbd_img_obj_exists_callback().  The former remains covered, as the
latter is its only caller (through rbd_img_obj_request_submit()).

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: David Disseldorp <ddiss@suse.de>
This commit is contained in:
Ilya Dryomov 2016-09-13 20:18:01 +02:00
parent 058aa99191
commit c2e8241488
1 changed files with 15 additions and 13 deletions
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28
drivers/block/rbd.c
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@ -2742,8 +2742,8 @@ out_err:
* When the read completes, this page array will be transferred to
* the original object request for the copyup operation.
*
* If an error occurs, record it as the result of the original
* object request and mark it done so it gets completed.
* If an error occurs, it is recorded as the result of the original
* object request in rbd_img_obj_exists_callback().
*/
static int rbd_img_obj_parent_read_full(struct rbd_obj_request *obj_request)
{
@ -2813,10 +2813,6 @@ out_err:
ceph_release_page_vector(pages, page_count);
if (parent_request)
rbd_img_request_put(parent_request);
obj_request->result = result;
obj_request->xferred = 0;
obj_request_done_set(obj_request);
return result;
}
@ -2868,19 +2864,25 @@ static void rbd_img_obj_exists_callback(struct rbd_obj_request *obj_request)
obj_request_existence_set(orig_request, true);
} else if (result == -ENOENT) {
obj_request_existence_set(orig_request, false);
} else if (result) {
orig_request->result = result;
goto out;
} else {
goto fail_orig_request;
}
/*
* Resubmit the original request now that we have recorded
* whether the target object exists.
*/
orig_request->result = rbd_img_obj_request_submit(orig_request);
out:
if (orig_request->result)
rbd_obj_request_complete(orig_request);
result = rbd_img_obj_request_submit(orig_request);
if (result)
goto fail_orig_request;
return;
fail_orig_request:
orig_request->result = result;
orig_request->xferred = 0;
obj_request_done_set(orig_request);
rbd_obj_request_complete(orig_request);
}
static int rbd_img_obj_exists_submit(struct rbd_obj_request *obj_request)