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b=NQu/DJbyAxt3L6ix+4xYh6eiS85CFCt+7TQVXAbDipVCj/Sll+R9ZMZ9KWmtANr8zu6oVC5GJj6sF4f7lJBbQ24yXBj2h3ljKJX/cvr5UPTuCzaAMCR0+HgSYLXSauNaQmwP5/Bjqq+xW0g4fjHhTn7aZ+VeX6WGuvOPG/BCI3NwA+IA+n7FzwbyvAubXhUaihAkaWdlGLOXLWEaszoWwaLV6alp9/VcuimeFJupUA+jUpw+r4IFlwReIa4rnju+cOXHTfRgPJdx+3EXRyTENt8jj26aKEx0qz5cT/NPq1FHacovuFcJdpb3YQKYzDYmERCW4kJPnKoCZyGhzI+x2Q== From: Tejus GK To: qemu-devel@nongnu.org Cc: quintela@redhat.com, peterx@redhat.com, leobras@redhat.com, berrange@redhat.com, aravind.retnakaran@nutanix.com, shivam.kumar1@nutanix.com, Tejus GK Subject: [RFC 1/2] migration/vmstate: Introduce vmstate_save_state_with_err Date: Fri, 26 May 2023 11:50:02 +0000 Message-Id: <20230526115003.212004-2-tejus.gk@nutanix.com> X-Mailer: git-send-email 2.22.3 In-Reply-To: <20230526115003.212004-1-tejus.gk@nutanix.com> References: <20230526115003.212004-1-tejus.gk@nutanix.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: SJ0PR03CA0136.namprd03.prod.outlook.com (2603:10b6:a03:33c::21) To BYAPR02MB4806.namprd02.prod.outlook.com (2603:10b6:a03:42::30) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BYAPR02MB4806:EE_|CO6PR02MB8738:EE_ X-MS-Office365-Filtering-Correlation-Id: 9affeb4f-6697-4963-82a8-08db5ddf64b4 x-proofpoint-crosstenant: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=148.163.151.68; envelope-from=tejus.gk@nutanix.com; helo=mx0a-002c1b01.pphosted.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham 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 @nutanix.com) X-ZM-MESSAGEID: 1685101892225100005 Content-Type: text/plain; charset="utf-8" Currently, a few code paths exist in the function vmstate_save_state_v, which ultimately leads to a migration failure. However, an update in the current MigrationState for the error description is never done. vmstate.c somehow doesn't seem to allow the use of migrate_set_error due to some dependencies for unit tests. Hence, this patch introduces a new function vmstate_save_state_with_err, which will eventually propagate the error message to savevm.c where a migrate_set_error call can be eventually done. Signed-off-by: Tejus GK --- include/migration/vmstate.h | 4 +++- migration/savevm.c | 2 +- migration/vmstate.c | 12 +++++++++--- 3 files changed, 13 insertions(+), 5 deletions(-) diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h index 084f5e784a..244d00ca74 100644 --- a/include/migration/vmstate.h +++ b/include/migration/vmstate.h @@ -1194,9 +1194,11 @@ int vmstate_load_state(QEMUFile *f, const VMStateDes= cription *vmsd, void *opaque, int version_id); int vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, void *opaque, JSONWriter *vmdesc); +int vmstate_save_state_with_err(QEMUFile *f, const VMStateDescription *vms= d, + void *opaque, JSONWriter *vmdesc, Error **errp); int vmstate_save_state_v(QEMUFile *f, const VMStateDescription *vmsd, void *opaque, JSONWriter *vmdesc, - int version_id); + int version_id, Error **errp); =20 bool vmstate_save_needed(const VMStateDescription *vmsd, void *opaque); =20 diff --git a/migration/savevm.c b/migration/savevm.c index 03795ce8dc..ec7f66619f 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -1000,7 +1000,7 @@ static int vmstate_save(QEMUFile *f, SaveStateEntry *= se, JSONWriter *vmdesc) if (!se->vmsd) { vmstate_save_old_style(f, se, vmdesc); } else { - ret =3D vmstate_save_state(f, se->vmsd, se->opaque, vmdesc); + ret =3D vmstate_save_state_with_err(f, se->vmsd, se->opaque, vmdes= c, &local_err); if (ret) { return ret; } diff --git a/migration/vmstate.c b/migration/vmstate.c index af01d54b6f..35a9b67afc 100644 --- a/migration/vmstate.c +++ b/migration/vmstate.c @@ -315,11 +315,17 @@ bool vmstate_save_needed(const VMStateDescription *vm= sd, void *opaque) int vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, void *opaque, JSONWriter *vmdesc_id) { - return vmstate_save_state_v(f, vmsd, opaque, vmdesc_id, vmsd->version_= id); + return vmstate_save_state_v(f, vmsd, opaque, vmdesc_id, vmsd->version_= id, NULL); +} + +int vmstate_save_state_with_err(QEMUFile *f, const VMStateDescription *vms= d, + void *opaque, JSONWriter *vmdesc_id, Error **errp) +{ + return vmstate_save_state_v(f, vmsd, opaque, vmdesc_id, vmsd->version_= id, errp); } =20 int vmstate_save_state_v(QEMUFile *f, const VMStateDescription *vmsd, - void *opaque, JSONWriter *vmdesc, int version_id) + void *opaque, JSONWriter *vmdesc, int version_id,= Error **errp) { int ret =3D 0; const VMStateField *field =3D vmsd->fields; @@ -377,7 +383,7 @@ int vmstate_save_state_v(QEMUFile *f, const VMStateDesc= ription *vmsd, } else if (field->flags & VMS_VSTRUCT) { ret =3D vmstate_save_state_v(f, field->vmsd, curr_elem, vmdesc_loop, - field->struct_version_id); + field->struct_version_id, e= rrp); } else { ret =3D field->info->put(f, curr_elem, size, field, vmdesc_loop); --=20 2.22.3