diff options
Diffstat (limited to 'block-cow.c')
| -rw-r--r-- | block-cow.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/block-cow.c b/block-cow.c index 8880c1cb6a..47a91e5ac9 100644 --- a/block-cow.c +++ b/block-cow.c @@ -85,14 +85,14 @@ static int cow_open(BlockDriverState *bs, const char *filename, int flags) be32_to_cpu(cow_header.version) != COW_VERSION) { goto fail; } - + /* cow image found */ size = be64_to_cpu(cow_header.size); bs->total_sectors = size / 512; pstrcpy(bs->backing_file, sizeof(bs->backing_file), cow_header.backing_file); - + /* mmap the bitmap */ s->cow_bitmap_size = ((bs->total_sectors + 7) >> 3) + sizeof(cow_header); s->cow_bitmap_addr = mmap(get_mmap_addr(s->cow_bitmap_size), @@ -155,7 +155,7 @@ static int cow_read(BlockDriverState *bs, int64_t sector_num, { BDRVCowState *s = bs->opaque; int ret, n; - + while (nb_sectors > 0) { if (is_changed(s->cow_bitmap, sector_num, nb_sectors, &n)) { lseek(s->fd, s->cow_sectors_offset + sector_num * 512, SEEK_SET); @@ -184,7 +184,7 @@ static int cow_write(BlockDriverState *bs, int64_t sector_num, { BDRVCowState *s = bs->opaque; int ret, i; - + lseek(s->fd, s->cow_sectors_offset + sector_num * 512, SEEK_SET); ret = write(s->fd, buf, nb_sectors * 512); if (ret != nb_sectors * 512) |