From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48416) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UxFoE-0003YO-8q for qemu-devel@nongnu.org; Thu, 11 Jul 2013 08:17:21 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UxFoA-0005MQ-Nr for qemu-devel@nongnu.org; Thu, 11 Jul 2013 08:17:18 -0400 Received: from mx.ipv6.kamp.de ([2a02:248:0:51::16]:57571 helo=mx01.kamp.de) by eggs.gnu.org with smtp (Exim 4.71) (envelope-from ) id 1UxFoA-0005Ku-BU for qemu-devel@nongnu.org; Thu, 11 Jul 2013 08:17:14 -0400 From: Peter Lieven Date: Thu, 11 Jul 2013 14:16:21 +0200 Message-Id: <1373544987-20613-5-git-send-email-pl@kamp.de> In-Reply-To: <1373544987-20613-1-git-send-email-pl@kamp.de> References: <1373544987-20613-1-git-send-email-pl@kamp.de> Subject: [Qemu-devel] [PATCHv3 04/10] iscsi: add .bdrv_write_zeroes List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, pbonzini@redhat.com, Peter Lieven , ronniesahlberg@gmail.com, stefanha@redhat.com Signed-off-by: Peter Lieven --- block/iscsi.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/block/iscsi.c b/block/iscsi.c index 60f2fd0..64554bc 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -906,6 +906,21 @@ retry: return 0; } +static int +coroutine_fn iscsi_co_write_zeroes(BlockDriverState *bs, int64_t sector_num, + int nb_sectors) +{ + IscsiLun *iscsilun = bs->opaque; + + if (!iscsilun->lbprz || !iscsilun->lbpu || + !(bs->open_flags & BDRV_O_UNMAP)) { + /* fall back to writev */ + return -ENOTSUP; + } + + return iscsi_co_discard(bs, sector_num, nb_sectors); +} + static int parse_chap(struct iscsi_context *iscsi, const char *target) { QemuOptsList *list; @@ -1452,6 +1467,7 @@ static BlockDriver bdrv_iscsi = { .bdrv_co_is_allocated = iscsi_co_is_allocated, .bdrv_co_discard = iscsi_co_discard, + .bdrv_co_write_zeroes = iscsi_co_write_zeroes, .bdrv_aio_readv = iscsi_aio_readv, .bdrv_aio_writev = iscsi_aio_writev, -- 1.7.9.5