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From 5d590d354e42515ea074bf2110a2ab236dbabba1 Mon Sep 17 00:00:00 2001
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From: Kevin Wolf <kwolf@redhat.com>
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Date: Mon, 8 Jun 2020 15:01:34 +0100
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Subject: [PATCH 06/17] raw-format: Support BDRV_REQ_ZERO_WRITE for truncate
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RH-Author: Kevin Wolf <kwolf@redhat.com>
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Message-id: <20200608150140.38218-6-kwolf@redhat.com>
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Patchwork-id: 97447
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O-Subject: [RHEL-AV-8.2.1 qemu-kvm PATCH 05/11] raw-format: Support BDRV_REQ_ZERO_WRITE for truncate
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Bugzilla: 1780574
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RH-Acked-by: Sergio Lopez Pascual <slp@redhat.com>
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RH-Acked-by: Eric Blake <eblake@redhat.com>
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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The raw format driver can simply forward the flag and let its bs->file
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child take care of actually providing the zeros.
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Reviewed-by: Max Reitz <mreitz@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
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Message-Id: <20200424125448.63318-6-kwolf@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit 1ddaabaecb7eaeb6d8948a32340af95db44c54a1)
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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block/raw-format.c | 4 +++-
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1 file changed, 3 insertions(+), 1 deletion(-)
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diff --git a/block/raw-format.c b/block/raw-format.c
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index c3acf9a..bdec466 100644
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--- a/block/raw-format.c
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+++ b/block/raw-format.c
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@@ -387,7 +387,7 @@ static int coroutine_fn raw_co_truncate(BlockDriverState *bs, int64_t offset,
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s->size = offset;
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offset += s->offset;
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- return bdrv_co_truncate(bs->file, offset, exact, prealloc, 0, errp);
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+ return bdrv_co_truncate(bs->file, offset, exact, prealloc, flags, errp);
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}
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static void raw_eject(BlockDriverState *bs, bool eject_flag)
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@@ -445,6 +445,8 @@ static int raw_open(BlockDriverState *bs, QDict *options, int flags,
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bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED |
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((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK) &
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bs->file->bs->supported_zero_flags);
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+ bs->supported_truncate_flags = bs->file->bs->supported_truncate_flags &
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+ BDRV_REQ_ZERO_WRITE;
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if (bs->probed && !bdrv_is_read_only(bs)) {
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bdrv_refresh_filename(bs->file->bs);
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--
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1.8.3.1
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