diff options
| -rw-r--r-- | blockdev.c | 62 | ||||
| -rw-r--r-- | blockdev.h | 1 | ||||
| -rw-r--r-- | hmp-commands.hx | 19 |
3 files changed, 82 insertions, 0 deletions
diff --git a/blockdev.c b/blockdev.c index 3b3b82dba7..d7add36929 100644 --- a/blockdev.c +++ b/blockdev.c @@ -516,6 +516,68 @@ void do_commit(Monitor *mon, const QDict *qdict) } } +int do_snapshot_blkdev(Monitor *mon, const QDict *qdict, QObject **ret_data) +{ + const char *device = qdict_get_str(qdict, "device"); + const char *filename = qdict_get_try_str(qdict, "snapshot_file"); + const char *format = qdict_get_try_str(qdict, "format"); + BlockDriverState *bs; + BlockDriver *drv, *proto_drv; + int ret = 0; + int flags; + + bs = bdrv_find(device); + if (!bs) { + qerror_report(QERR_DEVICE_NOT_FOUND, device); + ret = -1; + goto out; + } + + if (!format) { + format = "qcow2"; + } + + drv = bdrv_find_format(format); + if (!drv) { + qerror_report(QERR_INVALID_BLOCK_FORMAT, format); + ret = -1; + goto out; + } + + proto_drv = bdrv_find_protocol(filename); + if (!proto_drv) { + qerror_report(QERR_INVALID_BLOCK_FORMAT, format); + ret = -1; + goto out; + } + + ret = bdrv_img_create(filename, format, bs->filename, + bs->drv->format_name, NULL, -1, bs->open_flags); + if (ret) { + goto out; + } + + qemu_aio_flush(); + bdrv_flush(bs); + + flags = bs->open_flags; + bdrv_close(bs); + ret = bdrv_open(bs, filename, flags, drv); + /* + * If reopening the image file we just created fails, we really + * are in trouble :( + */ + if (ret != 0) { + abort(); + } +out: + if (ret) { + ret = -1; + } + + return ret; +} + static int eject_device(Monitor *mon, BlockDriverState *bs, int force) { if (!force) { diff --git a/blockdev.h b/blockdev.h index 4cb8ca93d4..4536b5cab1 100644 --- a/blockdev.h +++ b/blockdev.h @@ -52,5 +52,6 @@ int do_block_set_passwd(Monitor *mon, const QDict *qdict, QObject **ret_data); int do_change_block(Monitor *mon, const char *device, const char *filename, const char *fmt); int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data); +int do_snapshot_blkdev(Monitor *mon, const QDict *qdict, QObject **ret_data); #endif diff --git a/hmp-commands.hx b/hmp-commands.hx index 23024ba6f2..dd3db36108 100644 --- a/hmp-commands.hx +++ b/hmp-commands.hx @@ -801,6 +801,25 @@ STEXI Set maximum tolerated downtime (in seconds) for migration. ETEXI + { + .name = "snapshot_blkdev", + .args_type = "device:s,snapshot_file:s?,format:s?", + .params = "device [new-image-file] [format]", + .help = "initiates a live snapshot\n\t\t\t" + "of device. If a new image file is specified, the\n\t\t\t" + "new image file will become the new root image.\n\t\t\t" + "If format is specified, the snapshot file will\n\t\t\t" + "be created in that format. Otherwise the\n\t\t\t" + "snapshot will be internal! (currently unsupported)", + .mhandler.cmd_new = do_snapshot_blkdev, + }, + +STEXI +@item snapshot_blkdev +@findex snapshot_blkdev +Snapshot device, using snapshot file as target if provided +ETEXI + #if defined(TARGET_I386) { .name = "drive_add", |