diff options
| -rw-r--r-- | blockdev.c | 30 | ||||
| -rw-r--r-- | blockdev.h | 1 | ||||
| -rw-r--r-- | hmp-commands.hx | 19 | ||||
| -rw-r--r-- | qmp-commands.hx | 28 |
4 files changed, 78 insertions, 0 deletions
diff --git a/blockdev.c b/blockdev.c index f7f591fe78..e48d33dd29 100644 --- a/blockdev.c +++ b/blockdev.c @@ -705,3 +705,33 @@ int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) return 0; } + +/* + * XXX: replace the QERR_UNDEFINED_ERROR errors with real values once the + * existing QERR_ macro mess is cleaned up. A good example for better + * error reports can be found in the qemu-img resize code. + */ +int do_block_resize(Monitor *mon, const QDict *qdict, QObject **ret_data) +{ + const char *device = qdict_get_str(qdict, "device"); + int64_t size = qdict_get_int(qdict, "size"); + BlockDriverState *bs; + + bs = bdrv_find(device); + if (!bs) { + qerror_report(QERR_DEVICE_NOT_FOUND, device); + return -1; + } + + if (size < 0) { + qerror_report(QERR_UNDEFINED_ERROR); + return -1; + } + + if (bdrv_truncate(bs, size)) { + qerror_report(QERR_UNDEFINED_ERROR); + return -1; + } + + return 0; +} diff --git a/blockdev.h b/blockdev.h index 4536b5cab1..b8a88bff26 100644 --- a/blockdev.h +++ b/blockdev.h @@ -53,5 +53,6 @@ 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); +int do_block_resize(Monitor *mon, const QDict *qdict, QObject **ret_data); #endif diff --git a/hmp-commands.hx b/hmp-commands.hx index 1cea572b15..8df4adf831 100644 --- a/hmp-commands.hx +++ b/hmp-commands.hx @@ -53,6 +53,25 @@ Quit the emulator. ETEXI { + .name = "block_resize", + .args_type = "device:B,size:o", + .params = "device size", + .help = "resize a block image", + .user_print = monitor_user_noop, + .mhandler.cmd_new = do_block_resize, + }, + +STEXI +@item block_resize +@findex block_resize +Resize a block image while a guest is running. Usually requires guest +action to see the updated size. Resize to a lower size is supported, +but should be used with extreme caution. Note that this command only +resizes image files, it can not resize block devices like LVM volumes. +ETEXI + + + { .name = "eject", .args_type = "force:-f,device:B", .params = "[-f] device", diff --git a/qmp-commands.hx b/qmp-commands.hx index 56c4d8bc47..9f79f5fdf2 100644 --- a/qmp-commands.hx +++ b/qmp-commands.hx @@ -601,6 +601,34 @@ Example: -> { "execute": "netdev_del", "arguments": { "id": "netdev1" } } <- { "return": {} } + +EQMP + + { + .name = "block_resize", + .args_type = "device:B,size:o", + .params = "device size", + .help = "resize a block image", + .user_print = monitor_user_noop, + .mhandler.cmd_new = do_block_resize, + }, + +SQMP +block_resize +------------ + +Resize a block image while a guest is running. + +Arguments: + +- "device": the device's ID, must be unique (json-string) +- "size": new size + +Example: + +-> { "execute": "block_resize", "arguments": { "device": "scratch", "size": 1073741824 } } +<- { "return": {} } + EQMP { |