From patchwork Tue Feb 28 15:51:31 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefano Stabellini X-Patchwork-Id: 143483 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 15BA3B6EE8 for ; Wed, 29 Feb 2012 02:46:38 +1100 (EST) Received: from localhost ([::1]:37247 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S2PG7-0005IT-UK for incoming@patchwork.ozlabs.org; Tue, 28 Feb 2012 10:46:35 -0500 Received: from eggs.gnu.org ([208.118.235.92]:48217) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S2PEt-0001ha-9I for qemu-devel@nongnu.org; Tue, 28 Feb 2012 10:45:25 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1S2PES-000410-6F for qemu-devel@nongnu.org; Tue, 28 Feb 2012 10:45:18 -0500 Received: from smtp.citrix.com ([66.165.176.89]:38613) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S2PER-00040Y-V3 for qemu-devel@nongnu.org; Tue, 28 Feb 2012 10:44:52 -0500 X-IronPort-AV: E=Sophos;i="4.73,496,1325480400"; d="scan'208";a="22523380" Received: from ftlpmailmx02.citrite.net ([10.13.107.66]) by FTLPIPO01.CITRIX.COM with ESMTP/TLS/RC4-MD5; 28 Feb 2012 10:44:48 -0500 Received: from ukmail1.uk.xensource.com (10.80.16.128) by smtprelay.citrix.com (10.13.107.66) with Microsoft SMTP Server id 8.3.213.0; Tue, 28 Feb 2012 10:44:48 -0500 Received: from kaball.uk.xensource.com ([10.80.2.59] helo=localhost.localdomain) by ukmail1.uk.xensource.com with esmtp (Exim 4.69) (envelope-from ) id 1S2PEI-00083u-8i; Tue, 28 Feb 2012 15:44:42 +0000 From: Stefano Stabellini To: qemu-devel@nongnu.org Date: Tue, 28 Feb 2012 15:51:31 +0000 Message-ID: <1330444295-8859-2-git-send-email-stefano.stabellini@eu.citrix.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: References: MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 66.165.176.89 Cc: jan.kiszka@siemens.com, xen-devel@lists.xensource.com, avi@redhat.com, anthony@codemonkey.ws, Stefano Stabellini Subject: [Qemu-devel] [PATCH RESEND v5 2/6] Introduce "save_devices" 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 - add an "is_ram" flag to SaveStateEntry; - add an "is_ram" parameter to register_savevm_live; - introduce a "save_devices" monitor command that can be used to save the state of non-ram devices. Signed-off-by: Stefano Stabellini Acked-by: Anthony PERARD --- block-migration.c | 2 +- hmp-commands.hx | 14 ++++++++++ qmp-commands.hx | 17 ++++++++++++ savevm.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++++- sysemu.h | 1 + vl.c | 2 +- vmstate.h | 1 + 7 files changed, 106 insertions(+), 3 deletions(-) diff --git a/block-migration.c b/block-migration.c index 4467468..d283fd0 100644 --- a/block-migration.c +++ b/block-migration.c @@ -722,6 +722,6 @@ void blk_mig_init(void) QSIMPLEQ_INIT(&block_mig_state.bmds_list); QSIMPLEQ_INIT(&block_mig_state.blk_list); - register_savevm_live(NULL, "block", 0, 1, block_set_params, + register_savevm_live(NULL, "block", 0, 1, 0, block_set_params, block_save_live, NULL, block_load, &block_mig_state); } diff --git a/hmp-commands.hx b/hmp-commands.hx index 64b3656..873abc9 100644 --- a/hmp-commands.hx +++ b/hmp-commands.hx @@ -280,6 +280,20 @@ a snapshot with the same tag or ID, it is replaced. More info at ETEXI { + .name = "save_devices", + .args_type = "filename:F", + .params = "filename", + .help = "save the state of non-ram devices.", + .mhandler.cmd_new = do_save_device_state, + }, + +STEXI +@item save_devices @var{filename} +@findex save_devices +Save the state of non-ram devices. +ETEXI + + { .name = "loadvm", .args_type = "name:s", .params = "tag|id", diff --git a/qmp-commands.hx b/qmp-commands.hx index 705f704..619d9de 100644 --- a/qmp-commands.hx +++ b/qmp-commands.hx @@ -444,6 +444,23 @@ Note: inject-nmi is only supported for x86 guest currently, it will EQMP { + .name = "save_devices", + .args_type = "filename:F", + .params = "filename", + .help = "save the state of non-ram devices.", + .user_print = monitor_user_noop, + .mhandler.cmd_new = do_save_device_state, + }, + +SQMP +save_devices +------- + +Save the state of non-ram devices. + +EQMP + + { .name = "migrate", .args_type = "detach:-d,blk:-b,inc:-i,uri:s", .params = "[-d] [-b] [-i] uri", diff --git a/savevm.c b/savevm.c index 80be1ff..d0e62bb 100644 --- a/savevm.c +++ b/savevm.c @@ -1177,6 +1177,7 @@ typedef struct SaveStateEntry { void *opaque; CompatEntry *compat; int no_migrate; + int is_ram; } SaveStateEntry; @@ -1223,6 +1224,7 @@ int register_savevm_live(DeviceState *dev, const char *idstr, int instance_id, int version_id, + int is_ram, SaveSetParamsHandler *set_params, SaveLiveStateHandler *save_live_state, SaveStateHandler *save_state, @@ -1241,6 +1243,7 @@ int register_savevm_live(DeviceState *dev, se->opaque = opaque; se->vmsd = NULL; se->no_migrate = 0; + se->is_ram = is_ram; if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) { char *id = dev->parent_bus->info->get_dev_path(dev); @@ -1277,7 +1280,7 @@ int register_savevm(DeviceState *dev, LoadStateHandler *load_state, void *opaque) { - return register_savevm_live(dev, idstr, instance_id, version_id, + return register_savevm_live(dev, idstr, instance_id, version_id, 0, NULL, NULL, save_state, load_state, opaque); } @@ -1728,6 +1731,43 @@ out: return ret; } +static int qemu_save_device_state(Monitor *mon, QEMUFile *f) +{ + SaveStateEntry *se; + + qemu_put_be32(f, QEMU_VM_FILE_MAGIC); + qemu_put_be32(f, QEMU_VM_FILE_VERSION); + + cpu_synchronize_all_states(); + + QTAILQ_FOREACH(se, &savevm_handlers, entry) { + int len; + + if (se->is_ram) + continue; + if (se->save_state == NULL && se->vmsd == NULL) + continue; + + /* Section type */ + qemu_put_byte(f, QEMU_VM_SECTION_FULL); + qemu_put_be32(f, se->section_id); + + /* ID string */ + len = strlen(se->idstr); + qemu_put_byte(f, len); + qemu_put_buffer(f, (uint8_t *)se->idstr, len); + + qemu_put_be32(f, se->instance_id); + qemu_put_be32(f, se->version_id); + + vmstate_save(f, se); + } + + qemu_put_byte(f, QEMU_VM_EOF); + + return qemu_file_get_error(f); +} + static SaveStateEntry *find_se(const char *idstr, int instance_id) { SaveStateEntry *se; @@ -2109,6 +2149,36 @@ void do_savevm(Monitor *mon, const QDict *qdict) vm_start(); } +int do_save_device_state(Monitor *mon, const QDict *qdict, QObject **ret_data) +{ + int ret; + QEMUFile *f; + int saved_vm_running; + const char *filename = qdict_get_try_str(qdict, "filename"); + + saved_vm_running = runstate_is_running(); + vm_stop(RUN_STATE_SAVE_VM); + + f = qemu_fopen(filename, "wb"); + if (!f) { + monitor_printf(mon, "Could not open VM state file\n"); + ret = -1; + goto the_end; + } + ret = qemu_save_device_state(mon, f); + qemu_fclose(f); + if (ret < 0) { + monitor_printf(mon, "Error %d while writing VM\n", ret); + goto the_end; + } + ret = 0; + + the_end: + if (saved_vm_running) + vm_start(); + return ret; +} + int load_vmstate(const char *name) { BlockDriverState *bs, *bs_vm_state; diff --git a/sysemu.h b/sysemu.h index 98118cc..f4d5bf4 100644 --- a/sysemu.h +++ b/sysemu.h @@ -70,6 +70,7 @@ void qemu_remove_exit_notifier(Notifier *notify); void qemu_add_machine_init_done_notifier(Notifier *notify); void do_savevm(Monitor *mon, const QDict *qdict); +int do_save_device_state(Monitor *mon, const QDict *qdict, QObject **ret_data); int load_vmstate(const char *name); void do_delvm(Monitor *mon, const QDict *qdict); void do_info_snapshots(Monitor *mon); diff --git a/vl.c b/vl.c index 1d4c350..5b2b84c 100644 --- a/vl.c +++ b/vl.c @@ -3393,7 +3393,7 @@ int main(int argc, char **argv, char **envp) default_drive(default_sdcard, snapshot, machine->use_scsi, IF_SD, 0, SD_OPTS); - register_savevm_live(NULL, "ram", 0, 4, NULL, ram_save_live, NULL, + register_savevm_live(NULL, "ram", 0, 4, 1, NULL, ram_save_live, NULL, ram_load, NULL); if (nb_numa_nodes > 0) { diff --git a/vmstate.h b/vmstate.h index 9d3c49c..3cef117 100644 --- a/vmstate.h +++ b/vmstate.h @@ -44,6 +44,7 @@ int register_savevm_live(DeviceState *dev, const char *idstr, int instance_id, int version_id, + int is_ram, SaveSetParamsHandler *set_params, SaveLiveStateHandler *save_live_state, SaveStateHandler *save_state,