diff options
Diffstat (limited to 'tools/blktap')
| -rw-r--r-- | tools/blktap/drivers/block-qcow.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/tools/blktap/drivers/block-qcow.c b/tools/blktap/drivers/block-qcow.c index c6d32a4077..dd65cd01bb 100644 --- a/tools/blktap/drivers/block-qcow.c +++ b/tools/blktap/drivers/block-qcow.c @@ -55,7 +55,7 @@ #define ROUNDUP(l, s) \ ({ \ (uint64_t)( \ - (l + (s - 1)) - ((l + (s - 1)) % s)); \ + ((l) + ((s) - 1)) - (((l) + ((s) - 1)) % (s))); \ }) #undef IOCB_IDX @@ -800,14 +800,14 @@ static int tdqcow_open (struct disk_driver *dd, const char *name, td_flag_t flag /* read the level 1 table */ shift = s->cluster_bits + s->l2_bits; - s->l1_size = (header->size + (1LL << shift) - 1) >> shift; + s->l1_size = ROUNDUP(header->size, 1LL << shift); s->l1_table_offset = header->l1_table_offset; /*allocate a 4Kbyte multiple of memory*/ l1_table_size = s->l1_size * sizeof(uint64_t); if (l1_table_size % 4096 > 0) { - l1_table_size = ((l1_table_size >> 12) + 1) << 12; + l1_table_size = ROUNDUP(l1_table_size, 4096); } ret = posix_memalign((void **)&s->l1_table, 4096, l1_table_size); if (ret != 0) goto fail; @@ -821,7 +821,7 @@ static int tdqcow_open (struct disk_driver *dd, const char *name, td_flag_t flag lseek(fd, 0, SEEK_SET); l1_table_block = l1_table_size + s->l1_table_offset; - l1_table_block = l1_table_block + 512 - (l1_table_block % 512); + l1_table_block = ROUNDUP(l1_table_block, 512); ret = posix_memalign((void **)&buf2, 4096, l1_table_block); if (ret != 0) goto fail; if (read(fd, buf2, l1_table_block) != l1_table_block) @@ -1226,11 +1226,11 @@ int qcow_create(const char *filename, uint64_t total_size, header_size = (header_size + 7) & ~7; if (header_size % 4096 > 0) { - header_size = ((header_size >> 12) + 1) << 12; + header_size = ROUNDUP(header_size, 4096); } shift = header.cluster_bits + header.l2_bits; - l1_size = ((size * 512) + (1LL << shift) - 1) >> shift; + l1_size = ROUNDUP(size * 512, 1LL << shift); header.l1_table_offset = cpu_to_be64(header_size); DPRINTF("L1 Table offset: %d, size %d\n", |