From c97ca29db0a68deb281a901f535cec5ea4862244 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Wed, 2 Apr 2014 15:30:29 +0200 Subject: iscsi: always query max WRITE SAME length Max WRITE SAME length is also used when the UNMAP bit is zero, so it should be queried even if LBPWS=0. Same for the optimal transfer length. However, the write_zeroes_alignment only matters for UNMAP=1 so we still restrict it to LBPWS=1. Reviewed-by: Peter Lieven Signed-off-by: Paolo Bonzini --- block/iscsi.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/block/iscsi.c b/block/iscsi.c index e68aa0ffde..21c18a39dc 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -1335,18 +1335,20 @@ static int iscsi_refresh_limits(BlockDriverState *bs) /* We don't actually refresh here, but just return data queried in * iscsi_open(): iscsi targets don't change their limits. */ - if (iscsilun->lbp.lbpu || iscsilun->lbp.lbpws) { + if (iscsilun->lbp.lbpu) { if (iscsilun->bl.max_unmap < 0xffffffff) { bs->bl.max_discard = sector_lun2qemu(iscsilun->bl.max_unmap, iscsilun); } bs->bl.discard_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran, iscsilun); + } - if (iscsilun->bl.max_ws_len < 0xffffffff) { - bs->bl.max_write_zeroes = sector_lun2qemu(iscsilun->bl.max_ws_len, - iscsilun); - } + if (iscsilun->bl.max_ws_len < 0xffffffff) { + bs->bl.max_write_zeroes = sector_lun2qemu(iscsilun->bl.max_ws_len, + iscsilun); + } + if (iscsilun->lbp.lbpws) { bs->bl.write_zeroes_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran, iscsilun); } -- cgit v1.2.3