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block: Track discard requests 

Both bdrv_discard and bdrv_aio_discard will call into bdrv_co_discard,
so add tracked_request_begin/end calls around the loop.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 1447064214-29930-4-git-send-email-famz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Fam Zheng 2015-11-09 18:16:48 +08:00 committed by Kevin Wolf
parent cdb5e3155e
commit b1066c8755
1 changed files with 10 additions and 3 deletions
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13
block/io.c
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@ -2424,6 +2424,7 @@ static void coroutine_fn bdrv_discard_co_entry(void *opaque)
int coroutine_fn bdrv_co_discard(BlockDriverState *bs, int64_t sector_num,
int nb_sectors)
{
BdrvTrackedRequest req;
int max_discard, ret;
if (!bs->drv) {
@ -2446,6 +2447,8 @@ int coroutine_fn bdrv_co_discard(BlockDriverState *bs, int64_t sector_num,
return 0;
}
tracked_request_begin(&req, bs, sector_num, nb_sectors,
BDRV_TRACKED_DISCARD);
bdrv_set_dirty(bs, sector_num, nb_sectors);
max_discard = MIN_NON_ZERO(bs->bl.max_discard, BDRV_REQUEST_MAX_SECTORS);
@ -2479,20 +2482,24 @@ int coroutine_fn bdrv_co_discard(BlockDriverState *bs, int64_t sector_num,
acb = bs->drv->bdrv_aio_discard(bs, sector_num, nb_sectors,
bdrv_co_io_em_complete, &co);
if (acb == NULL) {
return -EIO;
ret = -EIO;
goto out;
} else {
qemu_coroutine_yield();
ret = co.ret;
}
}
if (ret && ret != -ENOTSUP) {
return ret;
goto out;
}
sector_num += num;
nb_sectors -= num;
}
return 0;
ret = 0;
out:
tracked_request_end(&req);
return ret;
}
int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors)