diff options
| -rw-r--r-- | block/file-posix.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/block/file-posix.c b/block/file-posix.c index cfbb236f6f..f4de022ae0 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -1339,6 +1339,9 @@ static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData *aiocb) #if defined(CONFIG_FALLOCATE) || defined(CONFIG_XFS) BDRVRawState *s = aiocb->bs->opaque; #endif +#ifdef CONFIG_FALLOCATE + int64_t len; +#endif if (aiocb->aio_type & QEMU_AIO_BLKDEV) { return handle_aiocb_write_zeroes_block(aiocb); @@ -1381,7 +1384,10 @@ static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData *aiocb) #endif #ifdef CONFIG_FALLOCATE - if (s->has_fallocate && aiocb->aio_offset >= bdrv_getlength(aiocb->bs)) { + /* Last resort: we are trying to extend the file with zeroed data. This + * can be done via fallocate(fd, 0) */ + len = bdrv_getlength(aiocb->bs); + if (s->has_fallocate && len >= 0 && aiocb->aio_offset >= len) { int ret = do_fallocate(s->fd, 0, aiocb->aio_offset, aiocb->aio_nbytes); if (ret == 0 || ret != -ENOTSUP) { return ret; |