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block: Move request_alignment into BlockLimit

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It makes more sense to have ALL block size limit constraints
in the same struct.  Improve the documentation while at it.

Simplify a couple of conditionals, now that we have audited and
documented that request_alignment is always non-zero.

Signed-off-by: Eric Blake <eblake@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 16:37:24 -06:00 • committed by Kevin Wolf
parent d9e0dfa246
commit a5b8dd2ce8
12 changed files with 39 additions and 35 deletions
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2
block/iscsi.c
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@ -1705,7 +1705,7 @@ static void iscsi_refresh_limits(BlockDriverState *bs, Error **errp)
IscsiLun *iscsilun = bs->opaque;
uint64_t max_xfer_len = iscsilun->use_16_for_rw ? 0xffffffff : 0xffff;
bs->request_alignment = iscsilun->block_size;
bs->bl.request_alignment = iscsilun->block_size;
if (iscsilun->bl.max_xfer_len) {
max_xfer_len = MIN(max_xfer_len, iscsilun->bl.max_xfer_len);