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rbd: make discard trigger copy-on-write

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Discard requests are a form of write, so they should go through the
same process as plain write requests and trigger copy-on-write for
layered images.

Signed-off-by: Josh Durgin <[email protected]>
This commit is contained in:
Josh Durgin 2014-04-04 17:49:12 -07:00 • committed by Ilya Dryomov
commit 1c220881e3
1 changed files with 2 additions and 1 deletions
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3
drivers/block/rbd.c
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@ -2851,7 +2851,8 @@ static bool img_obj_request_simple(struct rbd_obj_request *obj_request)
rbd_dev = img_request->rbd_dev;
/* Reads */
if (!img_request_write_test(img_request))
if (!img_request_write_test(img_request) &&
!img_request_discard_test(img_request))
return true;
/* Non-layered writes */