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[Qemu-devel] [PATCHv3 04/10] iscsi: add .bdrv_write_zeroes
From: |
Peter Lieven |
Subject: |
[Qemu-devel] [PATCHv3 04/10] iscsi: add .bdrv_write_zeroes |
Date: |
Thu, 11 Jul 2013 14:16:21 +0200 |
Signed-off-by: Peter Lieven <address@hidden>
---
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
- [Qemu-devel] [PATCHv3 00/10] iscsi/qemu-img/block-migration enhancements, Peter Lieven, 2013/07/11
- [Qemu-devel] [PATCHv3 03/10] iscsi: add .bdrv_co_discard, Peter Lieven, 2013/07/11
- [Qemu-devel] [PATCHv3 02/10] iscsi: add .bdrv_co_is_allocated, Peter Lieven, 2013/07/11
- [Qemu-devel] [PATCHv3 01/10] iscsi: add logical block provisioning information to iscsilun, Peter Lieven, 2013/07/11
- [Qemu-devel] [PATCHv3 04/10] iscsi: add .bdrv_write_zeroes,
Peter Lieven <=
- [Qemu-devel] [PATCHv3 05/10] block: add bdrv_write_zeroes(), Peter Lieven, 2013/07/11
- [Qemu-devel] [PATCHv3 07/10] iscsi: fix -ENOSPC in iscsi_create(), Peter Lieven, 2013/07/11
- [Qemu-devel] [PATCHv3 09/10] iscsi: remove support for misaligned nb_sectors in aio_readv, Peter Lieven, 2013/07/11
- [Qemu-devel] [PATCHv3 08/10] iscsi: factor out sector conversions, Peter Lieven, 2013/07/11
- [Qemu-devel] [PATCHv3 10/10] iscsi: assert that sectors are aligned to LUN blocksize, Peter Lieven, 2013/07/11
- [Qemu-devel] [PATCHv3 06/10] block/raw: add bdrv_co_write_zeroes, Peter Lieven, 2013/07/11
- Re: [Qemu-devel] [PATCHv3 00/10] iscsi/qemu-img/block-migration enhancements, Paolo Bonzini, 2013/07/17
- Re: [Qemu-devel] [PATCHv3 00/10] iscsi/qemu-img/block-migration enhancements, Stefan Hajnoczi, 2013/07/18