qemu-kvm/kvm-qemu-img-commit-Report-errors-while-closing-the-imag.patch

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2023-04-04 12:34:43 +00:00
From 2396df7fe527567e8e78761ef24ea1057ef6fa48 Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Thu, 12 Jan 2023 20:14:52 +0100
Subject: [PATCH 2/4] qemu-img commit: Report errors while closing the image
RH-Author: Kevin Wolf <kwolf@redhat.com>
RH-MergeRequest: 251: qemu-img: Fix exit code for errors closing the image
RH-Bugzilla: 2147617
RH-Acked-by: Hanna Czenczek <hreitz@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-Commit: [2/4] 28f95bf76d1d63e2b0bed0c2ba5206bd3e5ea4f8
blk_unref() can't report any errors that happen while closing the image.
For example, if qcow2 hits an -ENOSPC error while writing out dirty
bitmaps when it's closed, it prints error messages to stderr, but
'qemu-img commit' won't see any error return value and will therefore
look successful with exit code 0.
In order to fix this, manually inactivate the image first before calling
blk_unref(). This already performs the operations that would be most
likely to fail while closing the image, but it can still return errors.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230112191454.169353-3-kwolf@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 44efba2d713aca076c411594d0c1a2b99155eeb3)
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
qemu-img.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/qemu-img.c b/qemu-img.c
index f036a1d428..18833f7d69 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -443,6 +443,11 @@ static BlockBackend *img_open(bool image_opts,
blk = img_open_file(filename, NULL, fmt, flags, writethrough, quiet,
force_share);
}
+
+ if (blk) {
+ blk_set_force_allow_inactivate(blk);
+ }
+
return blk;
}
@@ -1110,6 +1115,14 @@ unref_backing:
done:
qemu_progress_end();
+ /*
+ * Manually inactivate the image first because this way we can know whether
+ * an error occurred. blk_unref() doesn't tell us about failures.
+ */
+ ret = bdrv_inactivate_all();
+ if (ret < 0 && !local_err) {
+ error_setg_errno(&local_err, -ret, "Error while closing the image");
+ }
blk_unref(blk);
if (local_err) {
--
2.37.3