diff options
| -rw-r--r-- | blockdev.c | 39 | ||||
| -rw-r--r-- | blockdev.h | 1 | ||||
| -rw-r--r-- | hmp-commands.hx | 18 |
3 files changed, 58 insertions, 0 deletions
diff --git a/blockdev.c b/blockdev.c index 6cb179a409..f6ac4398b8 100644 --- a/blockdev.c +++ b/blockdev.c @@ -14,6 +14,8 @@ #include "qemu-option.h" #include "qemu-config.h" #include "sysemu.h" +#include "hw/qdev.h" +#include "block_int.h" static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives); @@ -597,3 +599,40 @@ int do_change_block(Monitor *mon, const char *device, } return monitor_read_bdrv_key_start(mon, bs, NULL, NULL); } + +int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) +{ + const char *id = qdict_get_str(qdict, "id"); + BlockDriverState *bs; + BlockDriverState **ptr; + Property *prop; + + bs = bdrv_find(id); + if (!bs) { + qerror_report(QERR_DEVICE_NOT_FOUND, id); + return -1; + } + + /* quiesce block driver; prevent further io */ + qemu_aio_flush(); + bdrv_flush(bs); + bdrv_close(bs); + + /* clean up guest state from pointing to host resource by + * finding and removing DeviceState "drive" property */ + for (prop = bs->peer->info->props; prop && prop->name; prop++) { + if (prop->info->type == PROP_TYPE_DRIVE) { + ptr = qdev_get_prop_ptr(bs->peer, prop); + if ((*ptr) == bs) { + bdrv_detach(bs, bs->peer); + *ptr = NULL; + break; + } + } + } + + /* clean up host side */ + drive_uninit(drive_get_by_blockdev(bs)); + + return 0; +} diff --git a/blockdev.h b/blockdev.h index 653affcc9b..2a0559ef65 100644 --- a/blockdev.h +++ b/blockdev.h @@ -51,5 +51,6 @@ int do_eject(Monitor *mon, const QDict *qdict, QObject **ret_data); 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); #endif diff --git a/hmp-commands.hx b/hmp-commands.hx index e5585ba0e9..23024ba6f2 100644 --- a/hmp-commands.hx +++ b/hmp-commands.hx @@ -68,6 +68,24 @@ Eject a removable medium (use -f to force it). ETEXI { + .name = "drive_del", + .args_type = "id:s", + .params = "device", + .help = "remove host block device", + .user_print = monitor_user_noop, + .mhandler.cmd_new = do_drive_del, + }, + +STEXI +@item drive_del @var{device} +@findex drive_del +Remove host block device. The result is that guest generated IO is no longer +submitted against the host device underlying the disk. Once a drive has +been deleted, the QEMU Block layer returns -EIO which results in IO +errors in the guest for applications that are reading/writing to the device. +ETEXI + + { .name = "change", .args_type = "device:B,target:F,arg:s?", .params = "device filename [format]", |