From patchwork Tue Apr 16 16:05:18 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Hrdina X-Patchwork-Id: 237025 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id BD9B32C011D for ; Wed, 17 Apr 2013 02:10:21 +1000 (EST) Received: from localhost ([::1]:34309 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1US8SZ-000434-Uc for incoming@patchwork.ozlabs.org; Tue, 16 Apr 2013 12:10:19 -0400 Received: from eggs.gnu.org ([208.118.235.92]:39574) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1US8O5-0005aQ-03 for qemu-devel@nongnu.org; Tue, 16 Apr 2013 12:05:46 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1US8O2-0006uk-MV for qemu-devel@nongnu.org; Tue, 16 Apr 2013 12:05:40 -0400 Received: from mx1.redhat.com ([209.132.183.28]:10989) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1US8O2-0006ud-9b for qemu-devel@nongnu.org; Tue, 16 Apr 2013 12:05:38 -0400 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id r3GG5bdL022661 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Tue, 16 Apr 2013 12:05:37 -0400 Received: from localhost.localdomain.com ([10.34.250.241]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id r3GG5OMQ019439; Tue, 16 Apr 2013 12:05:36 -0400 From: Pavel Hrdina To: qemu-devel@nongnu.org Date: Tue, 16 Apr 2013 18:05:18 +0200 Message-Id: <36cf3cc0fded13e1fe2a55561b57de523de89000.1366127809.git.phrdina@redhat.com> In-Reply-To: References: In-Reply-To: References: X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: phrdina@redhat.com, armbru@redhat.com, lcapitulino@redhat.com Subject: [Qemu-devel] [PATCH 06/11] savevm: update error reporting for qemu_loadvm_state() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Signed-off-by: Pavel Hrdina Reviewed-by: Eric Blake --- include/sysemu/sysemu.h | 2 +- migration.c | 9 +++---- savevm.c | 64 ++++++++++++++++++++++++------------------------- 3 files changed, 37 insertions(+), 38 deletions(-) diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h index f46f9d2..70c6927 100644 --- a/include/sysemu/sysemu.h +++ b/include/sysemu/sysemu.h @@ -78,7 +78,7 @@ int qemu_savevm_state_iterate(QEMUFile *f); void qemu_savevm_state_complete(QEMUFile *f); void qemu_savevm_state_cancel(void); uint64_t qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size); -int qemu_loadvm_state(QEMUFile *f); +void qemu_loadvm_state(QEMUFile *f, Error **errp); /* SLIRP */ void do_info_slirp(Monitor *mon); diff --git a/migration.c b/migration.c index 3b4b467..fd8c869 100644 --- a/migration.c +++ b/migration.c @@ -93,12 +93,13 @@ void qemu_start_incoming_migration(const char *uri, Error **errp) static void process_incoming_migration_co(void *opaque) { QEMUFile *f = opaque; - int ret; + Error *local_err = NULL; - ret = qemu_loadvm_state(f); + qemu_loadvm_state(f, &local_err); qemu_fclose(f); - if (ret < 0) { - fprintf(stderr, "load of migration failed\n"); + if (error_is_set(&local_err)) { + fprintf(stderr, "%s\n", error_get_pretty(local_err)); + error_free(local_err); exit(0); } qemu_announce_self(); diff --git a/savevm.c b/savevm.c index ca4a42e..0419e0d 100644 --- a/savevm.c +++ b/savevm.c @@ -2077,7 +2077,7 @@ typedef struct LoadStateEntry { int version_id; } LoadStateEntry; -int qemu_loadvm_state(QEMUFile *f) +void qemu_loadvm_state(QEMUFile *f, Error **errp) { QLIST_HEAD(, LoadStateEntry) loadvm_handlers = QLIST_HEAD_INITIALIZER(loadvm_handlers); @@ -2086,21 +2086,25 @@ int qemu_loadvm_state(QEMUFile *f) unsigned int v; int ret; - if (qemu_savevm_state_blocked(NULL)) { - return -EINVAL; + if (qemu_savevm_state_blocked(errp)) { + return; } v = qemu_get_be32(f); - if (v != QEMU_VM_FILE_MAGIC) - return -EINVAL; + if (v != QEMU_VM_FILE_MAGIC) { + error_setg(errp, "unknown vmstate file magic"); + return; + } v = qemu_get_be32(f); if (v == QEMU_VM_FILE_VERSION_COMPAT) { - fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n"); - return -ENOTSUP; + error_setg(errp, "saveVM v2 format is obsolete and don't work anymore"); + return; + } + if (v != QEMU_VM_FILE_VERSION) { + error_setg(errp, "unknown vmstate file version"); + return; } - if (v != QEMU_VM_FILE_VERSION) - return -ENOTSUP; while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) { uint32_t instance_id, version_id, section_id; @@ -2122,16 +2126,15 @@ int qemu_loadvm_state(QEMUFile *f) /* Find savevm section */ se = find_se(idstr, instance_id); if (se == NULL) { - fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id); - ret = -EINVAL; + error_setg(errp, "unknown savevm section or instance '%s' %d", + idstr, instance_id); goto out; } /* Validate version */ if (version_id > se->version_id) { - fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n", - version_id, idstr, se->version_id); - ret = -EINVAL; + error_setg(errp, "unsupported version %d for '%s' v%d", + version_id, idstr, se->version_id); goto out; } @@ -2145,8 +2148,8 @@ int qemu_loadvm_state(QEMUFile *f) ret = vmstate_load(f, le->se, le->version_id); if (ret < 0) { - fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n", - instance_id, idstr); + error_setg(errp, "error while loading state for instance " + "0x%x of device '%s'", instance_id, idstr); goto out; } break; @@ -2160,40 +2163,35 @@ int qemu_loadvm_state(QEMUFile *f) } } if (le == NULL) { - fprintf(stderr, "Unknown savevm section %d\n", section_id); - ret = -EINVAL; + error_setg(errp, "unknown savevm section %d", section_id); goto out; } ret = vmstate_load(f, le->se, le->version_id); if (ret < 0) { - fprintf(stderr, "qemu: warning: error while loading state section id %d\n", + error_setg(errp, "error while loading state section id %d", section_id); goto out; } break; default: - fprintf(stderr, "Unknown savevm section type %d\n", section_type); - ret = -EINVAL; + error_setg(errp, "unknown savevm section type %d", section_type); goto out; } } cpu_synchronize_all_post_init(); - ret = 0; + ret = qemu_file_get_error(f); + if (ret < 0) { + error_setg_errno(errp, -ret, "failed to load vmstate"); + } out: QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { QLIST_REMOVE(le, entry); g_free(le); } - - if (ret == 0) { - ret = qemu_file_get_error(f); - } - - return ret; } static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, @@ -2400,7 +2398,6 @@ int load_vmstate(const char *name) BlockDriverState *bs, *bs_vm_state; QEMUSnapshotInfo sn; QEMUFile *f; - int ret; Error *local_err; bs_vm_state = bdrv_snapshots(); @@ -2463,12 +2460,13 @@ int load_vmstate(const char *name) } qemu_system_reset(VMRESET_SILENT); - ret = qemu_loadvm_state(f); + qemu_loadvm_state(f, &local_err); qemu_fclose(f); - if (ret < 0) { - error_report("Error %d while loading VM state", ret); - return ret; + if (error_is_set(&local_err)) { + error_report("%s", error_get_pretty(local_err)); + error_free(local_err); + return -1; } return 0;