diff options
| -rw-r--r-- | block/qed.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/block/qed.c b/block/qed.c index d8d6ea2126..da0bf3127b 100644 --- a/block/qed.c +++ b/block/qed.c @@ -1333,7 +1333,27 @@ static BlockDriverAIOCB *bdrv_qed_aio_flush(BlockDriverState *bs, static int bdrv_qed_truncate(BlockDriverState *bs, int64_t offset) { - return -ENOTSUP; + BDRVQEDState *s = bs->opaque; + uint64_t old_image_size; + int ret; + + if (!qed_is_image_size_valid(offset, s->header.cluster_size, + s->header.table_size)) { + return -EINVAL; + } + + /* Shrinking is currently not supported */ + if ((uint64_t)offset < s->header.image_size) { + return -ENOTSUP; + } + + old_image_size = s->header.image_size; + s->header.image_size = offset; + ret = qed_write_header_sync(s); + if (ret < 0) { + s->header.image_size = old_image_size; + } + return ret; } static int64_t bdrv_qed_getlength(BlockDriverState *bs) |