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qcow2: Set request_alignment during .bdrv_refresh_limits() 

We want to eventually stick request_alignment alongside other
BlockLimits, but first, we must ensure it is populated at the
same time as all other limits, rather than being a special case
that is set only when a block is first opened.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Eric Blake 2016-06-23 16:37:15 -06:00 committed by Kevin Wolf
parent c8b3b998e2
commit a84178ccff
1 changed files with 4 additions and 3 deletions
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7
block/qcow2.c
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@ -981,9 +981,6 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
}
bs->encrypted = 1;
/* Encryption works on a sector granularity */
bs->request_alignment = BDRV_SECTOR_SIZE;
}
s->l2_bits = s->cluster_bits - 3; /* L2 is always one cluster */
@ -1202,6 +1199,10 @@ static void qcow2_refresh_limits(BlockDriverState *bs, Error **errp)
{
BDRVQcow2State *s = bs->opaque;
if (bs->encrypted) {
/* Encryption works on a sector granularity */
bs->request_alignment = BDRV_SECTOR_SIZE;
}
bs->bl.pwrite_zeroes_alignment = s->cluster_size;
}