diff options
Diffstat (limited to 'block-qcow2.c')
| -rw-r--r-- | block-qcow2.c | 26 |
1 files changed, 9 insertions, 17 deletions
diff --git a/block-qcow2.c b/block-qcow2.c index f55a4e4792..a65a10d69b 100644 --- a/block-qcow2.c +++ b/block-qcow2.c @@ -429,8 +429,7 @@ static int grow_l1_table(BlockDriverState *bs, int min_size) int new_l1_size, new_l1_size2, ret, i; uint64_t *new_l1_table; uint64_t new_l1_table_offset; - uint64_t data64; - uint32_t data32; + uint8_t data[12]; new_l1_size = s->l1_size; if (min_size <= new_l1_size) @@ -460,13 +459,10 @@ static int grow_l1_table(BlockDriverState *bs, int min_size) new_l1_table[i] = be64_to_cpu(new_l1_table[i]); /* set new table */ - data64 = cpu_to_be64(new_l1_table_offset); - if (bdrv_pwrite(s->hd, offsetof(QCowHeader, l1_table_offset), - &data64, sizeof(data64)) != sizeof(data64)) - goto fail; - data32 = cpu_to_be32(new_l1_size); - if (bdrv_pwrite(s->hd, offsetof(QCowHeader, l1_size), - &data32, sizeof(data32)) != sizeof(data32)) + cpu_to_be32w((uint32_t*)data, new_l1_size); + cpu_to_be64w((uint64_t*)(data + 4), new_l1_table_offset); + if (bdrv_pwrite(s->hd, offsetof(QCowHeader, l1_size), data, + sizeof(data)) != sizeof(data)) goto fail; qemu_free(s->l1_table); free_clusters(bs, s->l1_table_offset, s->l1_size * sizeof(uint64_t)); @@ -2281,8 +2277,7 @@ static int grow_refcount_table(BlockDriverState *bs, int min_size) int new_table_size, new_table_size2, refcount_table_clusters, i, ret; uint64_t *new_table; int64_t table_offset; - uint64_t data64; - uint32_t data32; + uint8_t data[12]; int old_table_size; int64_t old_table_offset; @@ -2321,13 +2316,10 @@ static int grow_refcount_table(BlockDriverState *bs, int min_size) for(i = 0; i < s->refcount_table_size; i++) be64_to_cpus(&new_table[i]); - data64 = cpu_to_be64(table_offset); + cpu_to_be64w((uint64_t*)data, table_offset); + cpu_to_be32w((uint32_t*)(data + 8), refcount_table_clusters); if (bdrv_pwrite(s->hd, offsetof(QCowHeader, refcount_table_offset), - &data64, sizeof(data64)) != sizeof(data64)) - goto fail; - data32 = cpu_to_be32(refcount_table_clusters); - if (bdrv_pwrite(s->hd, offsetof(QCowHeader, refcount_table_clusters), - &data32, sizeof(data32)) != sizeof(data32)) + data, sizeof(data)) != sizeof(data)) goto fail; qemu_free(s->refcount_table); old_table_offset = s->refcount_table_offset; |