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Tsirkin" , Marcel Apfelbaum , Cornelia Huck , Halil Pasic , Eric Farman , Richard Henderson , David Hildenbrand , Ilya Leoshkevich , Thomas Huth , Christian Borntraeger , Nicholas Piggin , Daniel Henrique Barboza , Harsh Prateek Bora , Paolo Bonzini , Fam Zheng , Alex Williamson , =?utf-8?q?C=C3=A9dric_Le_Goater?= , Peter Xu , Fabiano Rosas , Hailiang Zhang , Steve Sistare , qemu-s390x@nongnu.org, qemu-ppc@nongnu.org, Stefan Berger , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Arun Menon X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=37982; i=armenon@redhat.com; h=from:subject:message-id; bh=eol3/2qASXq39//w4m7Qq7gshMRzylSLDOLg86mMQ6A=; b=owGbwMvMwCWWVaVqcZPfqI/xtFoSQ0bcpEv3Drq+eLwqL/OH55p6E2Oe1lu5l6+UZ9UyK/3c8 MLgDOuNjlIWBjEuBlkxRZaGrwGyTQGFEZG2L6/DzGFlAhnCwMUpABNJCGb4p/6kv8zl5GSd2RYx n1cva/54XDTy/fTdr0/MMpxccvfJdBFGhhPvzxj92DP9vorO98eVt8Kdk8ysd2xLi944azbDlVs GetwA X-Developer-Key: i=armenon@redhat.com; a=openpgp; fpr=80F5501D82507158593DE9D76A7A2538D90F328E Received-SPF: pass client-ip=170.10.133.124; envelope-from=armenon@redhat.com; helo=us-smtp-delivery-124.mimecast.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, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, T_SPF_TEMPERROR=0.01 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org - This is an incremental step in converting vmstate loading code to report errors. - Minimal changes to the signature and body of the following functions are done, - vmstate_load() - vmstate_load_state() - vmstate_subsection_load() - qemu_load_device_state() - qemu_loadvm_state() - qemu_loadvm_section_start_full() - qemu_loadvm_section_part_end() - qemu_loadvm_state_header() - qemu_loadvm_state_main() - error_report() has been replaced with error_setg(); and in places where error has been already set, error_prepend() is used to not lose information. Signed-off-by: Arun Menon --- hw/display/virtio-gpu.c | 2 +- hw/pci/pci.c | 2 +- hw/s390x/virtio-ccw.c | 2 +- hw/scsi/spapr_vscsi.c | 2 +- hw/vfio/pci.c | 2 +- hw/virtio/virtio-mmio.c | 2 +- hw/virtio/virtio-pci.c | 2 +- hw/virtio/virtio.c | 4 +- include/migration/vmstate.h | 2 +- migration/colo.c | 13 +++-- migration/cpr.c | 2 +- migration/migration.c | 19 ++++-- migration/savevm.c | 137 +++++++++++++++++++++++++++----------------- migration/savevm.h | 7 ++- migration/vmstate-types.c | 10 ++-- migration/vmstate.c | 40 +++++++------ tests/unit/test-vmstate.c | 18 +++--- 17 files changed, 158 insertions(+), 108 deletions(-) diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c index 0a1a625b0ea6cf26cb0d799171a57ed3d3ab2442..5d2ca8d8b864350133a674802d7316abd379591c 100644 --- a/hw/display/virtio-gpu.c +++ b/hw/display/virtio-gpu.c @@ -1343,7 +1343,7 @@ static int virtio_gpu_load(QEMUFile *f, void *opaque, size_t size, } /* load & apply scanout state */ - vmstate_load_state(f, &vmstate_virtio_gpu_scanouts, g, 1); + vmstate_load_state(f, &vmstate_virtio_gpu_scanouts, g, 1, NULL); return 0; } diff --git a/hw/pci/pci.c b/hw/pci/pci.c index c70b5ceebaf1f2b10768bd030526cbb518da2b8d..2ab5d30bb3c319ac1c7bfc9a2acf6a2b38082066 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -934,7 +934,7 @@ void pci_device_save(PCIDevice *s, QEMUFile *f) int pci_device_load(PCIDevice *s, QEMUFile *f) { int ret; - ret = vmstate_load_state(f, &vmstate_pci_device, s, s->version_id); + ret = vmstate_load_state(f, &vmstate_pci_device, s, s->version_id, NULL); /* Restore the interrupt status bit. */ pci_update_irq_status(s); return ret; diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index d2f85b39f30f7fc82e0c600144c0a958e1269b2c..2f6feff2b0a22d7d7f6aecfd7e7870d8362f1a73 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -1136,7 +1136,7 @@ static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f) static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f) { VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d); - return vmstate_load_state(f, &vmstate_virtio_ccw_dev, dev, 1); + return vmstate_load_state(f, &vmstate_virtio_ccw_dev, dev, 1, NULL); } static void virtio_ccw_pre_plugged(DeviceState *d, Error **errp) diff --git a/hw/scsi/spapr_vscsi.c b/hw/scsi/spapr_vscsi.c index 20f70fb2729de78b9636a6b8c869695dab4f8902..573fdea668536b464bca11f001e9e0288e781493 100644 --- a/hw/scsi/spapr_vscsi.c +++ b/hw/scsi/spapr_vscsi.c @@ -648,7 +648,7 @@ static void *vscsi_load_request(QEMUFile *f, SCSIRequest *sreq) assert(!req->active); memset(req, 0, sizeof(*req)); - rc = vmstate_load_state(f, &vmstate_spapr_vscsi_req, req, 1); + rc = vmstate_load_state(f, &vmstate_spapr_vscsi_req, req, 1, NULL); if (rc) { fprintf(stderr, "VSCSI: failed loading request tag#%u\n", sreq->tag); return NULL; diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index fa25bded25c51f8efb6c5ad31bd90506cd69745c..87aee0a5701087f9a68ea435bb96e9d6b07b0c24 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -2715,7 +2715,7 @@ static int vfio_pci_load_config(VFIODevice *vbasedev, QEMUFile *f) old_addr[bar] = pdev->io_regions[bar].addr; } - ret = vmstate_load_state(f, &vmstate_vfio_pci_config, vdev, 1); + ret = vmstate_load_state(f, &vmstate_vfio_pci_config, vdev, 1, NULL); if (ret) { return ret; } diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c index 532c67107ba1d2978a76cf49f9cdc1de1dea3e11..9058b1563462d4464dcba799643a583c93fb5683 100644 --- a/hw/virtio/virtio-mmio.c +++ b/hw/virtio/virtio-mmio.c @@ -619,7 +619,7 @@ static int virtio_mmio_load_extra_state(DeviceState *opaque, QEMUFile *f) { VirtIOMMIOProxy *proxy = VIRTIO_MMIO(opaque); - return vmstate_load_state(f, &vmstate_virtio_mmio, proxy, 1); + return vmstate_load_state(f, &vmstate_virtio_mmio, proxy, 1, NULL); } static bool virtio_mmio_has_extra_state(DeviceState *opaque) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index fba2372c93bfd648736b07e4bc83e7097baa58cb..50a1f5701754b88e8a1ee062d6eeedfd848cb4f5 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -160,7 +160,7 @@ static int virtio_pci_load_extra_state(DeviceState *d, QEMUFile *f) { VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); - return vmstate_load_state(f, &vmstate_virtio_pci, proxy, 1); + return vmstate_load_state(f, &vmstate_virtio_pci, proxy, 1, NULL); } static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 82a285a31d1c0427d55f7cb73398adfc94e678fe..66d5941f68a4b9e1e5390bb0aa45fc6cd34e2a1e 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -3317,14 +3317,14 @@ virtio_load(VirtIODevice *vdev, QEMUFile *f, int version_id) } if (vdc->vmsd) { - ret = vmstate_load_state(f, vdc->vmsd, vdev, version_id); + ret = vmstate_load_state(f, vdc->vmsd, vdev, version_id, NULL); if (ret) { return ret; } } /* Subsections */ - ret = vmstate_load_state(f, &vmstate_virtio, vdev, 1); + ret = vmstate_load_state(f, &vmstate_virtio, vdev, 1, NULL); if (ret) { return ret; } diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h index 1ff7bd9ac425ba67cd5ca7ad97bcf570f9e19abe..056781b1c21e737583f081594d9f88b32adfd674 100644 --- a/include/migration/vmstate.h +++ b/include/migration/vmstate.h @@ -1196,7 +1196,7 @@ extern const VMStateInfo vmstate_info_qlist; } int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, - void *opaque, int version_id); + void *opaque, int version_id, Error **errp); int vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, void *opaque, JSONWriter *vmdesc); int vmstate_save_state_with_err(QEMUFile *f, const VMStateDescription *vmsd, diff --git a/migration/colo.c b/migration/colo.c index e0f713c837f5da25d67afbd02ceb6c54024ca3af..808c980b4af3199968771cdc6cca3c2451a2f4a6 100644 --- a/migration/colo.c +++ b/migration/colo.c @@ -659,6 +659,7 @@ void migrate_start_colo_process(MigrationState *s) static void colo_incoming_process_checkpoint(MigrationIncomingState *mis, QEMUFile *fb, QIOChannelBuffer *bioc, Error **errp) { + ERRP_GUARD(); uint64_t total_size; uint64_t value; Error *local_err = NULL; @@ -686,11 +687,13 @@ static void colo_incoming_process_checkpoint(MigrationIncomingState *mis, bql_lock(); cpu_synchronize_all_states(); - ret = qemu_loadvm_state_main(mis->from_src_file, mis); + ret = qemu_loadvm_state_main(mis->from_src_file, mis, &local_err); bql_unlock(); if (ret < 0) { - error_setg(errp, "Load VM's live state (ram) error"); + if (local_err != NULL) { + error_prepend(errp, "Load VM's live state (ram) error"); + } return; } @@ -729,9 +732,11 @@ static void colo_incoming_process_checkpoint(MigrationIncomingState *mis, bql_lock(); vmstate_loading = true; colo_flush_ram_cache(); - ret = qemu_load_device_state(fb); + ret = qemu_load_device_state(fb, &local_err); if (ret < 0) { - error_setg(errp, "COLO: load device state failed"); + if (*errp != NULL) { + error_prepend(errp, "COLO: load device state failed"); + } vmstate_loading = false; bql_unlock(); return; diff --git a/migration/cpr.c b/migration/cpr.c index a50a57edca754b50e68fa9c294b3c89791e62ba8..0fb9fadac905c83689eed2b1193b282da679b6ef 100644 --- a/migration/cpr.c +++ b/migration/cpr.c @@ -235,7 +235,7 @@ int cpr_state_load(MigrationChannel *channel, Error **errp) return -ENOTSUP; } - ret = vmstate_load_state(f, &vmstate_cpr_state, &cpr_state, 1); + ret = vmstate_load_state(f, &vmstate_cpr_state, &cpr_state, 1, errp); if (ret) { error_setg(errp, "vmstate_load_state error %d", ret); qemu_fclose(f); diff --git a/migration/migration.c b/migration/migration.c index 4098870bce33ffdc57b5972fc5b106d88abb237e..ac06eb7b0195bfbcfe7662c91f109b2ff982146f 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -876,7 +876,7 @@ process_incoming_migration_co(void *opaque) MIGRATION_STATUS_ACTIVE); mis->loadvm_co = qemu_coroutine_self(); - ret = qemu_loadvm_state(mis->from_src_file); + ret = qemu_loadvm_state(mis->from_src_file, &local_err); mis->loadvm_co = NULL; trace_vmstate_downtime_checkpoint("dst-precopy-loadvm-completed"); @@ -903,7 +903,10 @@ process_incoming_migration_co(void *opaque) } if (ret < 0) { - error_setg(&local_err, "load of migration failed: %s", strerror(-ret)); + if (local_err != NULL) { + error_prepend(&local_err, "load of migration failed: %s: ", + strerror(-ret)); + } goto fail; } @@ -918,15 +921,19 @@ process_incoming_migration_co(void *opaque) fail: migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, MIGRATION_STATUS_FAILED); - migrate_set_error(s, local_err); - error_free(local_err); + if (local_err) { + migrate_set_error(s, local_err); + error_free(local_err); + } migration_incoming_state_destroy(); if (mis->exit_on_error) { WITH_QEMU_LOCK_GUARD(&s->error_mutex) { - error_report_err(s->error); - s->error = NULL; + if (s->error) { + error_report_err(s->error); + s->error = NULL; + } } exit(EXIT_FAILURE); diff --git a/migration/savevm.c b/migration/savevm.c index bb04a4520df9a443d90cf6cb52a383a5f053aaff..09329ba9a9f13e9bbed52def5245151c2c2ee803 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -963,13 +963,14 @@ void vmstate_unregister(VMStateIf *obj, const VMStateDescription *vmsd, } } -static int vmstate_load(QEMUFile *f, SaveStateEntry *se) +static int vmstate_load(QEMUFile *f, SaveStateEntry *se, Error **errp) { trace_vmstate_load(se->idstr, se->vmsd ? se->vmsd->name : "(old)"); if (!se->vmsd) { /* Old style */ return se->ops->load_state(f, se->opaque, se->load_version_id); } - return vmstate_load_state(f, se->vmsd, se->opaque, se->load_version_id); + return vmstate_load_state(f, se->vmsd, se->opaque, se->load_version_id, + errp); } static void vmstate_save_old_style(QEMUFile *f, SaveStateEntry *se, @@ -2071,6 +2072,7 @@ static void *postcopy_ram_listen_thread(void *opaque) { MigrationIncomingState *mis = migration_incoming_get_current(); QEMUFile *f = mis->from_src_file; + Error *local_err = NULL; int load_res; MigrationState *migr = migrate_get_current(); @@ -2089,7 +2091,7 @@ static void *postcopy_ram_listen_thread(void *opaque) qemu_file_set_blocking(f, true); /* TODO: sanity check that only postcopiable data will be loaded here */ - load_res = qemu_loadvm_state_main(f, mis); + load_res = qemu_loadvm_state_main(f, mis, &local_err); /* * This is tricky, but, mis->from_src_file can change after it @@ -2115,7 +2117,11 @@ static void *postcopy_ram_listen_thread(void *opaque) __func__, load_res); load_res = 0; /* prevent further exit() */ } else { - error_report("%s: loadvm failed: %d", __func__, load_res); + if (local_err != NULL) { + error_prepend(&local_err, "%s: loadvm failed: %d", __func__, + load_res); + migrate_set_error(migr, local_err); + } migrate_set_state(&mis->state, MIGRATION_STATUS_POSTCOPY_ACTIVE, MIGRATION_STATUS_FAILED); } @@ -2394,6 +2400,8 @@ static int loadvm_handle_cmd_packaged(MigrationIncomingState *mis) int ret; size_t length; QIOChannelBuffer *bioc; + Error *local_error; + MigrationState *migr = migrate_get_current(); length = qemu_get_be32(mis->from_src_file); trace_loadvm_handle_cmd_packaged(length); @@ -2440,7 +2448,12 @@ static int loadvm_handle_cmd_packaged(MigrationIncomingState *mis) qemu_coroutine_yield(); } while (1); - ret = qemu_loadvm_state_main(packf, mis); + ret = qemu_loadvm_state_main(packf, mis, &local_error); + if (ret < 0 && local_error != NULL) { + error_prepend(&local_error, "%s: loadvm failed: %d", __func__, + ret); + migrate_set_error(migr, local_error); + } trace_loadvm_handle_cmd_packaged_main(ret); qemu_fclose(packf); object_unref(OBJECT(bioc)); @@ -2674,8 +2687,9 @@ static bool check_section_footer(QEMUFile *f, SaveStateEntry *se) } static int -qemu_loadvm_section_start_full(QEMUFile *f, uint8_t type) +qemu_loadvm_section_start_full(QEMUFile *f, uint8_t type, Error **errp) { + ERRP_GUARD(); bool trace_downtime = (type == QEMU_VM_SECTION_FULL); uint32_t instance_id, version_id, section_id; int64_t start_ts, end_ts; @@ -2686,8 +2700,8 @@ qemu_loadvm_section_start_full(QEMUFile *f, uint8_t type) /* Read section start */ section_id = qemu_get_be32(f); if (!qemu_get_counted_string(f, idstr)) { - error_report("Unable to read ID string for section %u", - section_id); + error_setg(errp, "Unable to read ID string for section %u", + section_id); return -EINVAL; } instance_id = qemu_get_be32(f); @@ -2695,8 +2709,8 @@ qemu_loadvm_section_start_full(QEMUFile *f, uint8_t type) ret = qemu_file_get_error(f); if (ret) { - error_report("%s: Failed to read instance/version ID: %d", - __func__, ret); + error_setg(errp, "%s: Failed to read instance/version ID: %d", + __func__, ret); return ret; } @@ -2705,17 +2719,17 @@ qemu_loadvm_section_start_full(QEMUFile *f, uint8_t type) /* Find savevm section */ se = find_se(idstr, instance_id); if (se == NULL) { - error_report("Unknown savevm section or instance '%s' %"PRIu32". " - "Make sure that your current VM setup matches your " - "saved VM setup, including any hotplugged devices", - idstr, instance_id); + error_setg(errp, "Unknown savevm section or instance '%s' %"PRIu32". " + "Make sure that your current VM setup matches your " + "saved VM setup, including any hotplugged devices", + idstr, instance_id); return -EINVAL; } /* Validate version */ if (version_id > se->version_id) { - error_report("savevm: unsupported version %d for '%s' v%d", - version_id, idstr, se->version_id); + error_setg(errp, "savevm: unsupported version %d for '%s' v%d", + version_id, idstr, se->version_id); return -EINVAL; } se->load_version_id = version_id; @@ -2723,7 +2737,7 @@ qemu_loadvm_section_start_full(QEMUFile *f, uint8_t type) /* Validate if it is a device's state */ if (xen_enabled() && se->is_ram) { - error_report("loadvm: %s RAM loading not allowed on Xen", idstr); + error_setg(errp, "loadvm: %s RAM loading not allowed on Xen", idstr); return -EINVAL; } @@ -2731,10 +2745,13 @@ qemu_loadvm_section_start_full(QEMUFile *f, uint8_t type) start_ts = qemu_clock_get_us(QEMU_CLOCK_REALTIME); } - ret = vmstate_load(f, se); + ret = vmstate_load(f, se, errp); if (ret < 0) { - error_report("error while loading state for instance 0x%"PRIx32" of" - " device '%s'", instance_id, idstr); + if (*errp != NULL) { + error_prepend(errp, "error while loading state for " + "instance 0x%"PRIx32" of" + " device '%s'", instance_id, idstr); + } return ret; } @@ -2752,8 +2769,9 @@ qemu_loadvm_section_start_full(QEMUFile *f, uint8_t type) } static int -qemu_loadvm_section_part_end(QEMUFile *f, uint8_t type) +qemu_loadvm_section_part_end(QEMUFile *f, uint8_t type, Error **errp) { + ERRP_GUARD(); bool trace_downtime = (type == QEMU_VM_SECTION_END); int64_t start_ts, end_ts; uint32_t section_id; @@ -2764,8 +2782,8 @@ qemu_loadvm_section_part_end(QEMUFile *f, uint8_t type) ret = qemu_file_get_error(f); if (ret) { - error_report("%s: Failed to read section ID: %d", - __func__, ret); + error_setg(errp, "%s: Failed to read section ID: %d", + __func__, ret); return ret; } @@ -2776,7 +2794,7 @@ qemu_loadvm_section_part_end(QEMUFile *f, uint8_t type) } } if (se == NULL) { - error_report("Unknown savevm section %d", section_id); + error_setg(errp, "Unknown savevm section %d", section_id); return -EINVAL; } @@ -2784,10 +2802,12 @@ qemu_loadvm_section_part_end(QEMUFile *f, uint8_t type) start_ts = qemu_clock_get_us(QEMU_CLOCK_REALTIME); } - ret = vmstate_load(f, se); + ret = vmstate_load(f, se, errp); if (ret < 0) { - error_report("error while loading state section id %d(%s)", - section_id, se->idstr); + if (*errp != NULL) { + error_prepend(errp, "error while loading state section id %d(%s)", + section_id, se->idstr); + } return ret; } @@ -2804,33 +2824,38 @@ qemu_loadvm_section_part_end(QEMUFile *f, uint8_t type) return 0; } -static int qemu_loadvm_state_header(QEMUFile *f) +static int qemu_loadvm_state_header(QEMUFile *f, Error **errp) { unsigned int v; int ret; v = qemu_get_be32(f); if (v != QEMU_VM_FILE_MAGIC) { - error_report("Not a migration stream"); + error_setg(errp, "Not a migration stream magic %x != %x", + v, QEMU_VM_FILE_MAGIC); return -EINVAL; } v = qemu_get_be32(f); if (v == QEMU_VM_FILE_VERSION_COMPAT) { - error_report("SaveVM v2 format is obsolete and don't work anymore"); + error_setg(errp, "SaveVM v2 format is obsolete and don't work anymore"); return -ENOTSUP; } if (v != QEMU_VM_FILE_VERSION) { - error_report("Unsupported migration stream version"); + error_setg(errp, "Unsupported migration stream version %x != %x", + v, QEMU_VM_FILE_VERSION); return -ENOTSUP; } if (migrate_get_current()->send_configuration) { - if (qemu_get_byte(f) != QEMU_VM_CONFIGURATION) { - error_report("Configuration section missing"); + v = qemu_get_byte(f); + if (v != QEMU_VM_CONFIGURATION) { + error_setg(errp, "Configuration section missing, %x != %x", + v, QEMU_VM_CONFIGURATION); return -EINVAL; } - ret = vmstate_load_state(f, &vmstate_configuration, &savevm_state, 0); + ret = vmstate_load_state(f, &vmstate_configuration, &savevm_state, 0, + errp); if (ret) { return ret; @@ -3019,7 +3044,8 @@ static bool postcopy_pause_incoming(MigrationIncomingState *mis) return true; } -int qemu_loadvm_state_main(QEMUFile *f, MigrationIncomingState *mis) +int qemu_loadvm_state_main(QEMUFile *f, MigrationIncomingState *mis, + Error **errp) { uint8_t section_type; int ret = 0; @@ -3037,14 +3063,14 @@ retry: switch (section_type) { case QEMU_VM_SECTION_START: case QEMU_VM_SECTION_FULL: - ret = qemu_loadvm_section_start_full(f, section_type); + ret = qemu_loadvm_section_start_full(f, section_type, errp); if (ret < 0) { goto out; } break; case QEMU_VM_SECTION_PART: case QEMU_VM_SECTION_END: - ret = qemu_loadvm_section_part_end(f, section_type); + ret = qemu_loadvm_section_part_end(f, section_type, errp); if (ret < 0) { goto out; } @@ -3060,7 +3086,7 @@ retry: /* This is the end of migration */ goto out; default: - error_report("Unknown savevm section type %d", section_type); + error_setg(errp, "Unknown savevm section type %d", section_type); ret = -EINVAL; goto out; } @@ -3094,7 +3120,7 @@ out: return ret; } -int qemu_loadvm_state(QEMUFile *f) +int qemu_loadvm_state(QEMUFile *f, Error **errp) { MigrationState *s = migrate_get_current(); MigrationIncomingState *mis = migration_incoming_get_current(); @@ -3102,19 +3128,18 @@ int qemu_loadvm_state(QEMUFile *f) int ret; if (qemu_savevm_state_blocked(&local_err)) { - error_report_err(local_err); + error_propagate(errp, local_err); return -EINVAL; } qemu_loadvm_thread_pool_create(mis); - ret = qemu_loadvm_state_header(f); + ret = qemu_loadvm_state_header(f, errp); if (ret) { return ret; } - if (qemu_loadvm_state_setup(f, &local_err) != 0) { - error_report_err(local_err); + if (qemu_loadvm_state_setup(f, errp) != 0) { return -EINVAL; } @@ -3124,7 +3149,7 @@ int qemu_loadvm_state(QEMUFile *f) cpu_synchronize_all_pre_loadvm(); - ret = qemu_loadvm_state_main(f, mis); + ret = qemu_loadvm_state_main(f, mis, errp); qemu_event_set(&mis->main_thread_load_event); trace_qemu_loadvm_state_post_main(ret); @@ -3192,15 +3217,18 @@ int qemu_loadvm_state(QEMUFile *f) return ret; } -int qemu_load_device_state(QEMUFile *f) +int qemu_load_device_state(QEMUFile *f, Error **errp) { + ERRP_GUARD(); MigrationIncomingState *mis = migration_incoming_get_current(); int ret; /* Load QEMU_VM_SECTION_FULL section */ - ret = qemu_loadvm_state_main(f, mis); + ret = qemu_loadvm_state_main(f, mis, errp); if (ret < 0) { - error_report("Failed to load device state: %d", ret); + if (*errp != NULL) { + error_prepend(errp, "Failed to load device state: %d", ret); + } return ret; } @@ -3408,6 +3436,7 @@ void qmp_xen_save_devices_state(const char *filename, bool has_live, bool live, void qmp_xen_load_devices_state(const char *filename, Error **errp) { + ERRP_GUARD(); QEMUFile *f; QIOChannelFile *ioc; int ret; @@ -3429,10 +3458,10 @@ void qmp_xen_load_devices_state(const char *filename, Error **errp) f = qemu_file_new_input(QIO_CHANNEL(ioc)); object_unref(OBJECT(ioc)); - ret = qemu_loadvm_state(f); + ret = qemu_loadvm_state(f, errp); qemu_fclose(f); - if (ret < 0) { - error_setg(errp, "loading Xen device state failed"); + if (ret < 0 && *errp != NULL) { + error_prepend(errp, "loading Xen device state failed: "); } migration_incoming_state_destroy(); } @@ -3440,6 +3469,7 @@ void qmp_xen_load_devices_state(const char *filename, Error **errp) bool load_snapshot(const char *name, const char *vmstate, bool has_devices, strList *devices, Error **errp) { + ERRP_GUARD(); BlockDriverState *bs_vm_state; QEMUSnapshotInfo sn; QEMUFile *f; @@ -3503,16 +3533,17 @@ bool load_snapshot(const char *name, const char *vmstate, ret = -EINVAL; goto err_drain; } - ret = qemu_loadvm_state(f); + ret = qemu_loadvm_state(f, errp); migration_incoming_state_destroy(); bdrv_drain_all_end(); if (ret < 0) { - error_setg(errp, "Error %d while loading VM state", ret); + if (*errp != NULL) { + error_prepend(errp, "Error %d while loading VM state: ", ret); + } return false; } - return true; err_drain: diff --git a/migration/savevm.h b/migration/savevm.h index 2d5e9c716686f06720325e82fe90c75335ced1de..c337e3e3d111a7f28a57b90f61e8f70b71803d4e 100644 --- a/migration/savevm.h +++ b/migration/savevm.h @@ -64,10 +64,11 @@ void qemu_savevm_send_colo_enable(QEMUFile *f); void qemu_savevm_live_state(QEMUFile *f); int qemu_save_device_state(QEMUFile *f); -int qemu_loadvm_state(QEMUFile *f); +int qemu_loadvm_state(QEMUFile *f, Error **errp); void qemu_loadvm_state_cleanup(MigrationIncomingState *mis); -int qemu_loadvm_state_main(QEMUFile *f, MigrationIncomingState *mis); -int qemu_load_device_state(QEMUFile *f); +int qemu_loadvm_state_main(QEMUFile *f, MigrationIncomingState *mis, + Error **errp); +int qemu_load_device_state(QEMUFile *f, Error **errp); int qemu_loadvm_approve_switchover(void); int qemu_savevm_state_complete_precopy_non_iterable(QEMUFile *f, bool in_postcopy); diff --git a/migration/vmstate-types.c b/migration/vmstate-types.c index 741a588b7e18c6d37724b08a0101edc8bc74a0a5..1c5b76e1dd198030847971bc35637867c9d54fc0 100644 --- a/migration/vmstate-types.c +++ b/migration/vmstate-types.c @@ -549,7 +549,7 @@ static int get_tmp(QEMUFile *f, void *pv, size_t size, /* Writes the parent field which is at the start of the tmp */ *(void **)tmp = pv; - ret = vmstate_load_state(f, vmsd, tmp, version_id); + ret = vmstate_load_state(f, vmsd, tmp, version_id, NULL); g_free(tmp); return ret; } @@ -649,7 +649,7 @@ static int get_qtailq(QEMUFile *f, void *pv, size_t unused_size, while (qemu_get_byte(f)) { elm = g_malloc(size); - ret = vmstate_load_state(f, vmsd, elm, version_id); + ret = vmstate_load_state(f, vmsd, elm, version_id, NULL); if (ret) { return ret; } @@ -803,7 +803,7 @@ static int get_gtree(QEMUFile *f, void *pv, size_t unused_size, key = (void *)(uintptr_t)qemu_get_be64(f); } else { key = g_malloc0(key_size); - ret = vmstate_load_state(f, key_vmsd, key, version_id); + ret = vmstate_load_state(f, key_vmsd, key, version_id, NULL); if (ret) { error_report("%s : failed to load %s (%d)", field->name, key_vmsd->name, ret); @@ -811,7 +811,7 @@ static int get_gtree(QEMUFile *f, void *pv, size_t unused_size, } } val = g_malloc0(val_size); - ret = vmstate_load_state(f, val_vmsd, val, version_id); + ret = vmstate_load_state(f, val_vmsd, val, version_id, NULL); if (ret) { error_report("%s : failed to load %s (%d)", field->name, val_vmsd->name, ret); @@ -892,7 +892,7 @@ static int get_qlist(QEMUFile *f, void *pv, size_t unused_size, while (qemu_get_byte(f)) { elm = g_malloc(size); - ret = vmstate_load_state(f, vmsd, elm, version_id); + ret = vmstate_load_state(f, vmsd, elm, version_id, NULL); if (ret) { error_report("%s: failed to load %s (%d)", field->name, vmsd->name, ret); diff --git a/migration/vmstate.c b/migration/vmstate.c index 5feaa3244d259874f03048326b2497e7db32e47c..158dcc3fcddfe70ab268dc5ace6e4573fa1ccbab 100644 --- a/migration/vmstate.c +++ b/migration/vmstate.c @@ -25,7 +25,7 @@ static int vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, void *opaque, JSONWriter *vmdesc, Error **errp); static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, - void *opaque); + void *opaque, Error **errp); /* Whether this field should exist for either save or load the VM? */ static bool @@ -132,23 +132,23 @@ static void vmstate_handle_alloc(void *ptr, const VMStateField *field, } int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, - void *opaque, int version_id) + void *opaque, int version_id, Error **errp) { const VMStateField *field = vmsd->fields; int ret = 0; trace_vmstate_load_state(vmsd->name, version_id); if (version_id > vmsd->version_id) { - error_report("%s: incoming version_id %d is too new " - "for local version_id %d", - vmsd->name, version_id, vmsd->version_id); + error_setg(errp, "%s: incoming version_id %d is too new " + "for local version_id %d", + vmsd->name, version_id, vmsd->version_id); trace_vmstate_load_state_end(vmsd->name, "too new", -EINVAL); return -EINVAL; } if (version_id < vmsd->minimum_version_id) { - error_report("%s: incoming version_id %d is too old " - "for local minimum version_id %d", - vmsd->name, version_id, vmsd->minimum_version_id); + error_setg(errp, "%s: incoming version_id %d is too old " + "for local minimum version_id %d", + vmsd->name, version_id, vmsd->minimum_version_id); trace_vmstate_load_state_end(vmsd->name, "too old", -EINVAL); return -EINVAL; } @@ -192,10 +192,12 @@ int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, if (inner_field->flags & VMS_STRUCT) { ret = vmstate_load_state(f, inner_field->vmsd, curr_elem, - inner_field->vmsd->version_id); + inner_field->vmsd->version_id, + errp); } else if (inner_field->flags & VMS_VSTRUCT) { ret = vmstate_load_state(f, inner_field->vmsd, curr_elem, - inner_field->struct_version_id); + inner_field->struct_version_id, + errp); } else { ret = inner_field->info->get(f, curr_elem, size, inner_field); @@ -211,23 +213,27 @@ int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, } if (ret < 0) { qemu_file_set_error(f, ret); - error_report("Failed to load %s:%s", vmsd->name, - field->name); + error_setg(errp, "Failed to load %s:%s", vmsd->name, + field->name); trace_vmstate_load_field_error(field->name, ret); return ret; } } } else if (field->flags & VMS_MUST_EXIST) { - error_report("Input validation failed: %s/%s", - vmsd->name, field->name); + error_setg(errp, "Input validation failed: %s/%s", + vmsd->name, field->name); return -1; } field++; } assert(field->flags == VMS_END); - ret = vmstate_subsection_load(f, vmsd, opaque); + ret = vmstate_subsection_load(f, vmsd, opaque, errp); if (ret != 0) { qemu_file_set_error(f, ret); + if (*errp == NULL) { + error_setg(errp, "Load of field %s/%s failed", + vmsd->name, field->name); + } return ret; } if (vmsd->post_load) { @@ -566,7 +572,7 @@ vmstate_get_subsection(const VMStateDescription * const *sub, } static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, - void *opaque) + void *opaque, Error **errp) { trace_vmstate_subsection_load(vmsd->name); @@ -605,7 +611,7 @@ static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, qemu_file_skip(f, len); /* idstr */ version_id = qemu_get_be32(f); - ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); + ret = vmstate_load_state(f, sub_vmsd, opaque, version_id, errp); if (ret) { trace_vmstate_subsection_load_bad(vmsd->name, idstr, "(child)"); return ret; diff --git a/tests/unit/test-vmstate.c b/tests/unit/test-vmstate.c index 63f28f26f45691a70936d33e7341d16477a3471f..ca5e0ba1e3e5e2bb0a1ce39143a292f2c6f9420a 100644 --- a/tests/unit/test-vmstate.c +++ b/tests/unit/test-vmstate.c @@ -114,7 +114,7 @@ static int load_vmstate_one(const VMStateDescription *desc, void *obj, qemu_fclose(f); f = open_test_file(false); - ret = vmstate_load_state(f, desc, obj, version); + ret = vmstate_load_state(f, desc, obj, version, NULL); if (ret) { g_assert(qemu_file_get_error(f)); } else{ @@ -365,7 +365,7 @@ static void test_load_v1(void) QEMUFile *loading = open_test_file(false); TestStruct obj = { .b = 200, .e = 500, .f = 600 }; - vmstate_load_state(loading, &vmstate_versioned, &obj, 1); + vmstate_load_state(loading, &vmstate_versioned, &obj, 1, NULL); g_assert(!qemu_file_get_error(loading)); g_assert_cmpint(obj.a, ==, 10); g_assert_cmpint(obj.b, ==, 200); @@ -391,7 +391,7 @@ static void test_load_v2(void) QEMUFile *loading = open_test_file(false); TestStruct obj; - vmstate_load_state(loading, &vmstate_versioned, &obj, 2); + vmstate_load_state(loading, &vmstate_versioned, &obj, 2, NULL); g_assert_cmpint(obj.a, ==, 10); g_assert_cmpint(obj.b, ==, 20); g_assert_cmpint(obj.c, ==, 30); @@ -480,7 +480,7 @@ static void test_load_noskip(void) QEMUFile *loading = open_test_file(false); TestStruct obj = { .skip_c_e = false }; - vmstate_load_state(loading, &vmstate_skipping, &obj, 2); + vmstate_load_state(loading, &vmstate_skipping, &obj, 2, NULL); g_assert(!qemu_file_get_error(loading)); g_assert_cmpint(obj.a, ==, 10); g_assert_cmpint(obj.b, ==, 20); @@ -504,7 +504,7 @@ static void test_load_skip(void) QEMUFile *loading = open_test_file(false); TestStruct obj = { .skip_c_e = true, .c = 300, .e = 500 }; - vmstate_load_state(loading, &vmstate_skipping, &obj, 2); + vmstate_load_state(loading, &vmstate_skipping, &obj, 2, NULL); g_assert(!qemu_file_get_error(loading)); g_assert_cmpint(obj.a, ==, 10); g_assert_cmpint(obj.b, ==, 20); @@ -773,7 +773,7 @@ static void test_load_q(void) TestQtailq tgt; QTAILQ_INIT(&tgt.q); - vmstate_load_state(fload, &vmstate_q, &tgt, 1); + vmstate_load_state(fload, &vmstate_q, &tgt, 1, NULL); char eof = qemu_get_byte(fload); g_assert(!qemu_file_get_error(fload)); g_assert_cmpint(tgt.i16, ==, obj_q.i16); @@ -1127,7 +1127,7 @@ static void test_gtree_load_domain(void) fload = open_test_file(false); - vmstate_load_state(fload, &vmstate_domain, dest_domain, 1); + vmstate_load_state(fload, &vmstate_domain, dest_domain, 1, NULL); eof = qemu_get_byte(fload); g_assert(!qemu_file_get_error(fload)); g_assert_cmpint(orig_domain->id, ==, dest_domain->id); @@ -1241,7 +1241,7 @@ static void test_gtree_load_iommu(void) qemu_fclose(fsave); fload = open_test_file(false); - vmstate_load_state(fload, &vmstate_iommu, dest_iommu, 1); + vmstate_load_state(fload, &vmstate_iommu, dest_iommu, 1, NULL); eof = qemu_get_byte(fload); g_assert(!qemu_file_get_error(fload)); g_assert_cmpint(orig_iommu->id, ==, dest_iommu->id); @@ -1376,7 +1376,7 @@ static void test_load_qlist(void) qemu_fclose(fsave); fload = open_test_file(false); - vmstate_load_state(fload, &vmstate_container, dest_container, 1); + vmstate_load_state(fload, &vmstate_container, dest_container, 1, NULL); eof = qemu_get_byte(fload); g_assert(!qemu_file_get_error(fload)); g_assert_cmpint(eof, ==, QEMU_VM_EOF); -- 2.49.0