diff options
Diffstat (limited to 'block-qcow.c')
| -rw-r--r-- | block-qcow.c | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/block-qcow.c b/block-qcow.c index 1f44355b2f..9a0bca0e75 100644 --- a/block-qcow.c +++ b/block-qcow.c @@ -80,7 +80,7 @@ static int decompress_cluster(BDRVQcowState *s, uint64_t cluster_offset); static int qcow_probe(const uint8_t *buf, int buf_size, const char *filename) { const QCowHeader *cow_header = (const void *)buf; - + if (buf_size >= sizeof(QCowHeader) && be32_to_cpu(cow_header->magic) == QCOW_MAGIC && be32_to_cpu(cow_header->version) == QCOW_VERSION) @@ -108,7 +108,7 @@ static int qcow_open(BlockDriverState *bs, const char *filename, int flags) be64_to_cpus(&header.size); be32_to_cpus(&header.crypt_method); be64_to_cpus(&header.l1_table_offset); - + if (header.magic != QCOW_MAGIC || header.version != QCOW_VERSION) goto fail; if (header.size <= 1 || header.cluster_bits < 9) @@ -151,7 +151,7 @@ static int qcow_open(BlockDriverState *bs, const char *filename, int flags) if (!s->cluster_data) goto fail; s->cluster_cache_offset = -1; - + /* read the backing file name */ if (header.backing_file_offset != 0) { len = header.backing_file_size; @@ -177,7 +177,7 @@ static int qcow_set_key(BlockDriverState *bs, const char *key) BDRVQcowState *s = bs->opaque; uint8_t keybuf[16]; int len, i; - + memset(keybuf, 0, 16); len = strlen(key); if (len > 16) @@ -262,7 +262,7 @@ static uint64_t get_cluster_offset(BlockDriverState *bs, uint64_t l2_offset, *l2_table, cluster_offset, tmp; uint32_t min_count; int new_l2_table; - + l1_index = offset >> (s->l2_bits + s->cluster_bits); l2_offset = s->l1_table[l1_index]; new_l2_table = 0; @@ -420,7 +420,7 @@ static int decompress_buffer(uint8_t *out_buf, int out_buf_size, inflateEnd(strm); return 0; } - + static int decompress_cluster(BDRVQcowState *s, uint64_t cluster_offset) { int ret, csize; @@ -450,7 +450,7 @@ static int qcow_read(BlockDriverState *bs, int64_t sector_num, BDRVQcowState *s = bs->opaque; int ret, index_in_cluster, n; uint64_t cluster_offset; - + while (nb_sectors > 0) { cluster_offset = get_cluster_offset(bs, sector_num << 9, 0, 0, 0, 0); index_in_cluster = sector_num & (s->cluster_sectors - 1); @@ -493,7 +493,7 @@ static int qcow_write(BlockDriverState *bs, int64_t sector_num, BDRVQcowState *s = bs->opaque; int ret, index_in_cluster, n; uint64_t cluster_offset; - + while (nb_sectors > 0) { index_in_cluster = sector_num & (s->cluster_sectors - 1); n = s->cluster_sectors - index_in_cluster; @@ -572,7 +572,7 @@ static void qcow_aio_read_cb(void *opaque, int ret) qemu_aio_release(acb); return; } - + /* prepare next AIO request */ acb->cluster_offset = get_cluster_offset(bs, acb->sector_num << 9, 0, 0, 0, 0); @@ -627,7 +627,7 @@ static BlockDriverAIOCB *qcow_aio_read(BlockDriverState *bs, acb->buf = buf; acb->nb_sectors = nb_sectors; acb->n = 0; - acb->cluster_offset = 0; + acb->cluster_offset = 0; qcow_aio_read_cb(acb, 0); return &acb->common; @@ -661,7 +661,7 @@ static void qcow_aio_write_cb(void *opaque, int ret) qemu_aio_release(acb); return; } - + index_in_cluster = acb->sector_num & (s->cluster_sectors - 1); acb->n = s->cluster_sectors - index_in_cluster; if (acb->n > acb->nb_sectors) @@ -701,7 +701,7 @@ static BlockDriverAIOCB *qcow_aio_write(BlockDriverState *bs, { BDRVQcowState *s = bs->opaque; QCowAIOCB *acb; - + s->cluster_cache_offset = -1; /* disable compressed cache */ acb = qemu_aio_get(bs, cb, opaque); @@ -712,7 +712,7 @@ static BlockDriverAIOCB *qcow_aio_write(BlockDriverState *bs, acb->buf = (uint8_t *)buf; acb->nb_sectors = nb_sectors; acb->n = 0; - + qcow_aio_write_cb(acb, 0); return &acb->common; } @@ -774,7 +774,7 @@ static int qcow_create(const char *filename, int64_t total_size, } else { header.crypt_method = cpu_to_be32(QCOW_CRYPT_NONE); } - + /* write all the data */ write(fd, &header, sizeof(header)); if (backing_file) { @@ -864,7 +864,7 @@ static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num, return -1; } } - + qemu_free(out_buf); return 0; } |