diff options
Diffstat (limited to 'blockdev.c')
| -rw-r--r-- | blockdev.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/blockdev.c b/blockdev.c index c9e249ef3..6399d6658 100644 --- a/blockdev.c +++ b/blockdev.c @@ -73,7 +73,7 @@ void blockdev_auto_del(BlockDriverState *bs) DriveInfo *dinfo = drive_get_by_blockdev(bs); if (dinfo && dinfo->auto_del) { - drive_uninit(dinfo); + drive_put_ref(dinfo); } } @@ -180,7 +180,7 @@ static void bdrv_format_print(void *opaque, const char *name) error_printf(" %s", name); } -void drive_uninit(DriveInfo *dinfo) +static void drive_uninit(DriveInfo *dinfo) { qemu_opts_del(dinfo->opts); bdrv_delete(dinfo->bdrv); @@ -188,6 +188,19 @@ void drive_uninit(DriveInfo *dinfo) qemu_free(dinfo); } +void drive_put_ref(DriveInfo *dinfo) +{ + assert(dinfo->refcount); + if (--dinfo->refcount == 0) { + drive_uninit(dinfo); + } +} + +void drive_get_ref(DriveInfo *dinfo) +{ + dinfo->refcount++; +} + static int parse_block_error_action(const char *buf, int is_read) { if (!strcmp(buf, "ignore")) { @@ -462,6 +475,7 @@ DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi) dinfo->bus = bus_id; dinfo->unit = unit_id; dinfo->opts = opts; + dinfo->refcount = 1; if (serial) strncpy(dinfo->serial, serial, sizeof(dinfo->serial) - 1); QTAILQ_INSERT_TAIL(&drives, dinfo, next); @@ -725,6 +739,10 @@ int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) qerror_report(QERR_DEVICE_NOT_FOUND, id); return -1; } + if (bdrv_in_use(bs)) { + qerror_report(QERR_DEVICE_IN_USE, id); + return -1; + } /* quiesce block driver; prevent further io */ qemu_aio_flush(); |