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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client

Browse source 
Pull ceph fix from Sage Weil:
 "This fixes a regression introduced during the last merge window when
  mapping non-existent images."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  rbd: don't zero-fill non-image object requests
This commit is contained in:
Linus Torvalds 2013-03-29 11:47:43 -07:00
commit b92eded4b7
1 changed files with 30 additions and 17 deletions
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45
drivers/block/rbd.c
View file

@ -1264,6 +1264,32 @@ static bool obj_request_done_test(struct rbd_obj_request *obj_request)
return atomic_read(&obj_request->done) != 0;
}
static void
rbd_img_obj_request_read_callback(struct rbd_obj_request *obj_request)
{
dout("%s: obj %p img %p result %d %llu/%llu\n", __func__,
obj_request, obj_request->img_request, obj_request->result,
obj_request->xferred, obj_request->length);
/*
* ENOENT means a hole in the image. We zero-fill the
* entire length of the request. A short read also implies
* zero-fill to the end of the request. Either way we
* update the xferred count to indicate the whole request
* was satisfied.
*/
BUG_ON(obj_request->type != OBJ_REQUEST_BIO);
if (obj_request->result == -ENOENT) {
zero_bio_chain(obj_request->bio_list, 0);
obj_request->result = 0;
obj_request->xferred = obj_request->length;
} else if (obj_request->xferred < obj_request->length &&
!obj_request->result) {
zero_bio_chain(obj_request->bio_list, obj_request->xferred);
obj_request->xferred = obj_request->length;
}
obj_request_done_set(obj_request);
}
static void rbd_obj_request_complete(struct rbd_obj_request *obj_request)
{
dout("%s: obj %p cb %p\n", __func__, obj_request,
@ -1284,22 +1310,9 @@ static void rbd_osd_read_callback(struct rbd_obj_request *obj_request)
{
dout("%s: obj %p result %d %llu/%llu\n", __func__, obj_request,
obj_request->result, obj_request->xferred, obj_request->length);
/*
* ENOENT means a hole in the object. We zero-fill the
* entire length of the request. A short read also implies
* zero-fill to the end of the request. Either way we
* update the xferred count to indicate the whole request
* was satisfied.
*/
if (obj_request->result == -ENOENT) {
zero_bio_chain(obj_request->bio_list, 0);
obj_request->result = 0;
obj_request->xferred = obj_request->length;
} else if (obj_request->xferred < obj_request->length &&
!obj_request->result) {
zero_bio_chain(obj_request->bio_list, obj_request->xferred);
obj_request->xferred = obj_request->length;
}
if (obj_request->img_request)
rbd_img_obj_request_read_callback(obj_request);
else
obj_request_done_set(obj_request);
}