diff options
| -rw-r--r-- | block/vmdk.c | 76 |
1 files changed, 46 insertions, 30 deletions
diff --git a/block/vmdk.c b/block/vmdk.c index b53c5f5..de08d0c 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -102,8 +102,9 @@ static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename) { uint32_t magic; - if (buf_size < 4) + if (buf_size < 4) { return 0; + } magic = be32_to_cpu(*(uint32_t *)buf); if (magic == VMDK3_MAGIC || magic == VMDK4_MAGIC) { @@ -193,9 +194,10 @@ static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent) cid_str_size = sizeof("CID"); } - if ((p_name = strstr(desc,cid_str)) != NULL) { + p_name = strstr(desc, cid_str); + if (p_name != NULL) { p_name += cid_str_size; - sscanf(p_name,"%x",&cid); + sscanf(p_name, "%x", &cid); } return cid; @@ -212,9 +214,10 @@ static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) return -EIO; } - tmp_str = strstr(desc,"parentCID"); + tmp_str = strstr(desc, "parentCID"); pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str); - if ((p_name = strstr(desc,"CID")) != NULL) { + p_name = strstr(desc, "CID"); + if (p_name != NULL) { p_name += sizeof("CID"); snprintf(p_name, sizeof(desc) - (p_name - desc), "%x\n", cid); pstrcat(desc, sizeof(desc), tmp_desc); @@ -234,13 +237,14 @@ static int vmdk_is_cid_valid(BlockDriverState *bs) uint32_t cur_pcid; if (p_bs) { - cur_pcid = vmdk_read_cid(p_bs,0); - if (s->parent_cid != cur_pcid) - // CID not valid + cur_pcid = vmdk_read_cid(p_bs, 0); + if (s->parent_cid != cur_pcid) { + /* CID not valid */ return 0; + } } #endif - // CID valid + /* CID valid */ return 1; } @@ -255,14 +259,18 @@ static int vmdk_parent_open(BlockDriverState *bs) return -1; } - if ((p_name = strstr(desc,"parentFileNameHint")) != NULL) { + p_name = strstr(desc, "parentFileNameHint"); + if (p_name != NULL) { char *end_name; p_name += sizeof("parentFileNameHint") + 1; - if ((end_name = strchr(p_name,'\"')) == NULL) + end_name = strchr(p_name, '\"'); + if (end_name == NULL) { return -1; - if ((end_name - p_name) > sizeof (bs->backing_file) - 1) + } + if ((end_name - p_name) > sizeof(bs->backing_file) - 1) { return -1; + } pstrcpy(bs->backing_file, end_name - p_name + 1, p_name); } @@ -595,8 +603,9 @@ static int get_whole_cluster(BlockDriverState *bs, if (bs->backing_hd) { int ret; - if (!vmdk_is_cid_valid(bs)) + if (!vmdk_is_cid_valid(bs)) { return -1; + } /* floor offset to cluster */ offset -= offset % (extent->cluster_sectors * 512); @@ -655,8 +664,9 @@ static int get_cluster_offset(BlockDriverState *bs, int min_index, i, j; uint32_t min_count, *l2_table, tmp = 0; - if (m_data) + if (m_data) { m_data->valid = 0; + } if (extent->flat) { *cluster_offset = extent->flat_start_offset; return 0; @@ -712,7 +722,7 @@ static int get_cluster_offset(BlockDriverState *bs, return -1; } - // Avoid the L2 tables update for the images that have snapshots. + /* Avoid the L2 tables update for the images that have snapshots. */ *cluster_offset = bdrv_getlength(extent->file); bdrv_truncate( extent->file, @@ -729,8 +739,9 @@ static int get_cluster_offset(BlockDriverState *bs, * or inappropriate VM shutdown. */ if (get_whole_cluster( - bs, extent, *cluster_offset, offset, allocate) == -1) + bs, extent, *cluster_offset, offset, allocate) == -1) { return -1; + } if (m_data) { m_data->offset = tmp; @@ -780,8 +791,9 @@ static int vmdk_is_allocated(BlockDriverState *bs, int64_t sector_num, index_in_cluster = sector_num % extent->cluster_sectors; n = extent->cluster_sectors - index_in_cluster; - if (n > nb_sectors) + if (n > nb_sectors) { n = nb_sectors; + } *pnum = n; return ret; } @@ -805,16 +817,19 @@ static int vmdk_read(BlockDriverState *bs, int64_t sector_num, sector_num << 9, 0, &cluster_offset); index_in_cluster = sector_num % extent->cluster_sectors; n = extent->cluster_sectors - index_in_cluster; - if (n > nb_sectors) + if (n > nb_sectors) { n = nb_sectors; + } if (ret) { /* if not allocated, try to read from parent image, if exist */ if (bs->backing_hd) { - if (!vmdk_is_cid_valid(bs)) + if (!vmdk_is_cid_valid(bs)) { return -EINVAL; + } ret = bdrv_read(bs->backing_hd, sector_num, buf, n); - if (ret < 0) + if (ret < 0) { return ret; + } } else { memset(buf, 0, 512 * n); } @@ -888,7 +903,8 @@ static int vmdk_write(BlockDriverState *bs, int64_t sector_num, sector_num += n; buf += n * 512; - // update CID on the first write every time the virtual disk is opened + /* update CID on the first write every time the virtual disk is + * opened */ if (!s->cid_updated) { vmdk_write_cid(bs, time(NULL)); s->cid_updated = true; @@ -1301,16 +1317,16 @@ static QEMUOptionParameter vmdk_create_options[] = { }; static BlockDriver bdrv_vmdk = { - .format_name = "vmdk", - .instance_size = sizeof(BDRVVmdkState), - .bdrv_probe = vmdk_probe, + .format_name = "vmdk", + .instance_size = sizeof(BDRVVmdkState), + .bdrv_probe = vmdk_probe, .bdrv_open = vmdk_open, - .bdrv_read = vmdk_read, - .bdrv_write = vmdk_write, - .bdrv_close = vmdk_close, - .bdrv_create = vmdk_create, - .bdrv_flush = vmdk_flush, - .bdrv_is_allocated = vmdk_is_allocated, + .bdrv_read = vmdk_read, + .bdrv_write = vmdk_write, + .bdrv_close = vmdk_close, + .bdrv_create = vmdk_create, + .bdrv_flush = vmdk_flush, + .bdrv_is_allocated = vmdk_is_allocated, .create_options = vmdk_create_options, }; |