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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-25 10:34:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-25 10:34:17 -0700 |
| commit | 15e52d9a81a66fba97488541bb29c91954a3f4c7 (patch) | |
| tree | 9239f7fc9b59d772f850d0aa3d5902507c754026 | |
| parent | d91d66e88ea95b6dd21958834414009614385153 (diff) | |
| parent | 9638556a276125553549fdfe349c464481ec2f39 (diff) | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
Pull Ceph fix from Sage Weil:
"This fixes a corner case for cloned RBD images"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
rbd: handle parent_overlap on writes correctly
| -rw-r--r-- | drivers/block/rbd.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index bbeb404b3a0..b2c98c1bc03 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -1431,6 +1431,14 @@ static bool obj_request_exists_test(struct rbd_obj_request *obj_request) return test_bit(OBJ_REQ_EXISTS, &obj_request->flags) != 0; } +static bool obj_request_overlaps_parent(struct rbd_obj_request *obj_request) +{ + struct rbd_device *rbd_dev = obj_request->img_request->rbd_dev; + + return obj_request->img_offset < + round_up(rbd_dev->parent_overlap, rbd_obj_bytes(&rbd_dev->header)); +} + static void rbd_obj_request_get(struct rbd_obj_request *obj_request) { dout("%s: obj %p (was %d)\n", __func__, obj_request, @@ -2748,7 +2756,7 @@ static int rbd_img_obj_request_submit(struct rbd_obj_request *obj_request) */ if (!img_request_write_test(img_request) || !img_request_layered_test(img_request) || - rbd_dev->parent_overlap <= obj_request->img_offset || + !obj_request_overlaps_parent(obj_request) || ((known = obj_request_known_test(obj_request)) && obj_request_exists_test(obj_request))) { |