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s=mimecast20190719; t=1715609904; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=MNh8MqztCpfF7OGr39Q266D91LklWyonDbyRnnwXIZ4=; b=WRouQVrivy7fbCu6XWIn3XmBjHjHW8IwtmG6aUjEvP00x8EvmRhYH9LdfjWJ2O/9peoDs5 cQJtssjDYBJEUpBxainKStb8fnpXVF3H7S2NXN+Hh/mMxVLsfshuB+2dBhVZFcEX1YSA2V 2uOJfAzb41LIRsOYmVy1OpuXOc45IzA= X-MC-Unique: BzGwcxJaNM-H6Wpn-1q4Ug-1 From: Markus Armbruster To: qemu-devel@nongnu.org Cc: philmd@linaro.org, fam@euphon.net, kwolf@redhat.com, hreitz@redhat.com, marcandre.lureau@redhat.com, peterx@redhat.com, farosas@suse.de, pbonzini@redhat.com, richard.henderson@linaro.org, qemu-block@nongnu.org Subject: [PATCH 1/6] block: Improve error message when external snapshot can't flush Date: Mon, 13 May 2024 16:16:58 +0200 Message-ID: <20240513141703.549874-2-armbru@redhat.com> In-Reply-To: <20240513141703.549874-1-armbru@redhat.com> References: <20240513141703.549874-1-armbru@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.6 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.974, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1715609946930100009 Content-Type: text/plain; charset="utf-8" external_snapshot_action() reports bdrv_flush() failure to its caller as An IO error has occurred The errno code returned by bdrv_flush() is lost. Improve this to Write to node '' failed: Signed-off-by: Markus Armbruster Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- blockdev.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/blockdev.c b/blockdev.c index 08eccc9052..528db3452f 100644 --- a/blockdev.c +++ b/blockdev.c @@ -1406,8 +1406,10 @@ static void external_snapshot_action(TransactionActi= on *action, } =20 if (!bdrv_is_read_only(state->old_bs)) { - if (bdrv_flush(state->old_bs)) { - error_setg(errp, QERR_IO_ERROR); + ret =3D bdrv_flush(state->old_bs); + if (ret < 0) { + error_setg_errno(errp, -ret, "Write to node '%s' failed", + bdrv_get_device_or_node_name(state->old_bs)); return; } } --=20 2.45.0