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