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[83.165.45.250]) by smtp.gmail.com with ESMTPSA id f14sm27075926wro.90.2020.07.13.08.58.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Jul 2020 08:58:31 -0700 (PDT) From: Juan Quintela To: qemu-devel@nongnu.org Subject: [PATCH v2 2/3] migration/savevm: respect qemu_fclose() error code in save_snapshot() Date: Mon, 13 Jul 2020 17:58:26 +0200 Message-Id: <20200713155827.10670-3-quintela@redhat.com> X-Mailer: git-send-email 2.25.4 In-Reply-To: <20200713155827.10670-1-quintela@redhat.com> References: <20200713155827.10670-1-quintela@redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=205.139.110.61; envelope-from=quintela@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/13 01:36:29 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -40 X-Spam_score: -4.1 X-Spam_bar: ---- X-Spam_report: (-4.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, 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_H2=-1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Fam Zheng , Vladimir Sementsov-Ogievskiy , Juan Quintela , "Dr. David Alan Gilbert" , Max Reitz , Denis Plotnikov , quintela@trasno.org, Stefan Hajnoczi , "Denis V. Lunev" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: "Denis V. Lunev" qemu_fclose() could return error, f.e. if bdrv_co_flush() will return the error. This validation will become more important once we will start waiting of asynchronous IO operations, started from bdrv_write_vmstate(), which are coming soon. Signed-off-by: Denis V. Lunev Reviewed-by: "Dr. David Alan Gilbert" Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Juan Quintela CC: Kevin Wolf CC: Max Reitz CC: Stefan Hajnoczi CC: Fam Zheng CC: Juan Quintela CC: Denis Plotnikov Signed-off-by: Juan Quintela --- migration/savevm.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/migration/savevm.c b/migration/savevm.c index 6e01724605..45c9dd9d8a 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -2635,7 +2635,7 @@ int save_snapshot(const char *name, Error **errp) { BlockDriverState *bs, *bs1; QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; - int ret = -1; + int ret = -1, ret2; QEMUFile *f; int saved_vm_running; uint64_t vm_state_size; @@ -2719,10 +2719,14 @@ int save_snapshot(const char *name, Error **errp) } ret = qemu_savevm_state(f, errp); vm_state_size = qemu_ftell(f); - qemu_fclose(f); + ret2 = qemu_fclose(f); if (ret < 0) { goto the_end; } + if (ret2 < 0) { + ret = ret2; + goto the_end; + } /* The bdrv_all_create_snapshot() call that follows acquires the AioContext * for itself. BDRV_POLL_WHILE() does not support nested locking because