diff options
| -rw-r--r-- | block/file-posix.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/block/file-posix.c b/block/file-posix.c index fbc21a9921..d7fb772c14 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -1686,11 +1686,15 @@ static int raw_regular_truncate(int fd, int64_t offset, PreallocMode prealloc, * file systems that do not support fallocate(), trying to check if a * block is allocated before allocating it, so don't do that here. */ - result = -posix_fallocate(fd, current_length, offset - current_length); - if (result != 0) { - /* posix_fallocate() doesn't set errno. */ - error_setg_errno(errp, -result, - "Could not preallocate new data"); + if (offset != current_length) { + result = -posix_fallocate(fd, current_length, offset - current_length); + if (result != 0) { + /* posix_fallocate() doesn't set errno. */ + error_setg_errno(errp, -result, + "Could not preallocate new data"); + } + } else { + result = 0; } goto out; #endif |