diff options
Diffstat (limited to 'block/qcow2-snapshot.c')
| -rw-r--r-- | block/qcow2-snapshot.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/block/qcow2-snapshot.c b/block/qcow2-snapshot.c index 82c32d4c9b..2756b37d24 100644 --- a/block/qcow2-snapshot.c +++ b/block/qcow2-snapshot.c @@ -23,6 +23,7 @@ */ #include "qemu/osdep.h" +#include "sysemu/block-backend.h" #include "qapi/error.h" #include "qcow2.h" #include "qemu/bswap.h" @@ -775,10 +776,21 @@ int qcow2_snapshot_goto(BlockDriverState *bs, const char *snapshot_id) } if (sn->disk_size != bs->total_sectors * BDRV_SECTOR_SIZE) { - error_report("qcow2: Loading snapshots with different disk " - "size is not implemented"); - ret = -ENOTSUP; - goto fail; + BlockBackend *blk = blk_new_with_bs(bs, BLK_PERM_RESIZE, BLK_PERM_ALL, + &local_err); + if (!blk) { + error_report_err(local_err); + ret = -ENOTSUP; + goto fail; + } + + ret = blk_truncate(blk, sn->disk_size, true, PREALLOC_MODE_OFF, 0, + &local_err); + blk_unref(blk); + if (ret < 0) { + error_report_err(local_err); + goto fail; + } } /* |