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From bb95ce076f174cba655e098fb7924364fd29aa8b Mon Sep 17 00:00:00 2001
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Message-Id: <bb95ce076f174cba655e098fb7924364fd29aa8b.1389014116.git.minovotn@redhat.com>
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In-Reply-To: <c8cc35838d42aa286242772d97e3a9be7bb786ba.1389014116.git.minovotn@redhat.com>
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References: <c8cc35838d42aa286242772d97e3a9be7bb786ba.1389014116.git.minovotn@redhat.com>
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From: Paolo Bonzini <pbonzini@redhat.com>
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Date: Mon, 9 Dec 2013 14:09:15 +0100
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Subject: [PATCH 27/50] block: handle ENOTSUP from discard in generic code
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RH-Author: Paolo Bonzini <pbonzini@redhat.com>
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Message-id: <1386598178-11845-30-git-send-email-pbonzini@redhat.com>
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Patchwork-id: 56066
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O-Subject: [RHEL 7.0 qemu-kvm PATCH 29/52] block: handle ENOTSUP from discard in generic code
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Bugzilla: 1007815
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RH-Acked-by: Jeffrey Cody <jcody@redhat.com>
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RH-Acked-by: Fam Zheng <famz@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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Similar to write_zeroes, let the generic code receive a ENOTSUP for
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discard operations. Since bdrv_discard has advisory semantics,
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we can just swallow the error.
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Reviewed-by: Peter Lieven <pl@kamp.de>
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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(cherry picked from commit 7ce21016b69b512bf4777965a4292318f2bc7544)
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---
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block.c | 2 +-
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block/raw-posix.c | 12 ++++++------
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2 files changed, 7 insertions(+), 7 deletions(-)
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Signed-off-by: Michal Novotny <minovotn@redhat.com>
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---
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block.c | 2 +-
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block/raw-posix.c | 12 ++++++------
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2 files changed, 7 insertions(+), 7 deletions(-)
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diff --git a/block.c b/block.c
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index fc15370..c9e65b4 100644
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--- a/block.c
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+++ b/block.c
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@@ -4545,7 +4545,7 @@ int coroutine_fn bdrv_co_discard(BlockDriverState *bs, int64_t sector_num,
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ret = co.ret;
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}
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}
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- if (ret) {
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+ if (ret && ret != -ENOTSUP) {
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return ret;
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}
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diff --git a/block/raw-posix.c b/block/raw-posix.c
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index c2b3dfd..7a140b0 100644
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--- a/block/raw-posix.c
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+++ b/block/raw-posix.c
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@@ -324,10 +324,10 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
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}
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#endif
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- s->has_discard = 1;
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+ s->has_discard = true;
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#ifdef CONFIG_XFS
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if (platform_test_xfs_fd(s->fd)) {
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- s->is_xfs = 1;
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+ s->is_xfs = true;
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}
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#endif
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@@ -699,8 +699,8 @@ static ssize_t handle_aiocb_discard(RawPosixAIOData *aiocb)
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int ret = -EOPNOTSUPP;
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BDRVRawState *s = aiocb->bs->opaque;
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- if (s->has_discard == 0) {
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- return 0;
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+ if (!s->has_discard) {
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+ return -ENOTSUP;
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}
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if (aiocb->aio_type & QEMU_AIO_BLKDEV) {
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@@ -735,8 +735,8 @@ static ssize_t handle_aiocb_discard(RawPosixAIOData *aiocb)
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if (ret == -ENODEV || ret == -ENOSYS || ret == -EOPNOTSUPP ||
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ret == -ENOTTY) {
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- s->has_discard = 0;
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- ret = 0;
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+ s->has_discard = false;
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+ ret = -ENOTSUP;
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}
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return ret;
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}
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--
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1.7.11.7
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