diff options
Diffstat (limited to 'block/file-posix.c')
| -rw-r--r-- | block/file-posix.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/block/file-posix.c b/block/file-posix.c index 5d1995a07c..0b7e904d48 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -2020,7 +2020,8 @@ raw_regular_truncate(BlockDriverState *bs, int fd, int64_t offset, } static int coroutine_fn raw_co_truncate(BlockDriverState *bs, int64_t offset, - PreallocMode prealloc, Error **errp) + bool exact, PreallocMode prealloc, + Error **errp) { BDRVRawState *s = bs->opaque; struct stat st; @@ -2033,6 +2034,7 @@ static int coroutine_fn raw_co_truncate(BlockDriverState *bs, int64_t offset, } if (S_ISREG(st.st_mode)) { + /* Always resizes to the exact @offset */ return raw_regular_truncate(bs, s->fd, offset, prealloc, errp); } @@ -2043,7 +2045,12 @@ static int coroutine_fn raw_co_truncate(BlockDriverState *bs, int64_t offset, } if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { - if (offset > raw_getlength(bs)) { + int64_t cur_length = raw_getlength(bs); + + if (offset != cur_length && exact) { + error_setg(errp, "Cannot resize device files"); + return -ENOTSUP; + } else if (offset > cur_length) { error_setg(errp, "Cannot grow device files"); return -EINVAL; } |