diff options
Diffstat (limited to 'block/vmdk.c')
| -rw-r--r-- | block/vmdk.c | 58 |
1 files changed, 9 insertions, 49 deletions
diff --git a/block/vmdk.c b/block/vmdk.c index ae3412148b..e44769b88a 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -76,7 +76,6 @@ typedef struct BDRVVmdkState { unsigned int cluster_sectors; uint32_t parent_cid; - int is_parent; } BDRVVmdkState; typedef struct VmdkMetaData { @@ -338,19 +337,11 @@ fail: return ret; } -static void vmdk_parent_close(BlockDriverState *bs) -{ - if (bs->backing_hd) - bdrv_close(bs->backing_hd); -} - -static int parent_open = 0; -static int vmdk_parent_open(BlockDriverState *bs, const char * filename) +static int vmdk_parent_open(BlockDriverState *bs) { BDRVVmdkState *s = bs->opaque; char *p_name; char desc[DESC_SIZE]; - char parent_img_name[1024]; /* the descriptor offset = 0x200 */ if (bdrv_pread(s->hd, 0x200, desc, DESC_SIZE) != DESC_SIZE) @@ -358,7 +349,6 @@ static int vmdk_parent_open(BlockDriverState *bs, const char * filename) if ((p_name = strstr(desc,"parentFileNameHint")) != NULL) { char *end_name; - struct stat file_buf; p_name += sizeof("parentFileNameHint") + 1; if ((end_name = strchr(p_name,'\"')) == NULL) @@ -367,24 +357,6 @@ static int vmdk_parent_open(BlockDriverState *bs, const char * filename) return -1; pstrcpy(bs->backing_file, end_name - p_name + 1, p_name); - if (stat(bs->backing_file, &file_buf) != 0) { - path_combine(parent_img_name, sizeof(parent_img_name), - filename, bs->backing_file); - } else { - pstrcpy(parent_img_name, sizeof(parent_img_name), - bs->backing_file); - } - - bs->backing_hd = bdrv_new(""); - if (!bs->backing_hd) { - failure: - bdrv_close(s->hd); - return -1; - } - parent_open = 1; - if (bdrv_open(bs->backing_hd, parent_img_name, 0, NULL) < 0) - goto failure; - parent_open = 0; } return 0; @@ -396,11 +368,6 @@ static int vmdk_open(BlockDriverState *bs, const char *filename, int flags) uint32_t magic; int l1_size, i, ret; - if (parent_open) { - /* Parent must be opened as RO, no RDWR. */ - flags = 0; - } - ret = bdrv_file_open(&s->hd, filename, flags); if (ret < 0) return ret; @@ -436,13 +403,8 @@ static int vmdk_open(BlockDriverState *bs, const char *filename, int flags) s->l1_table_offset = le64_to_cpu(header.rgd_offset) << 9; s->l1_backup_table_offset = le64_to_cpu(header.gd_offset) << 9; - if (parent_open) - s->is_parent = 1; - else - s->is_parent = 0; - // try to open parent images, if exist - if (vmdk_parent_open(bs, filename) != 0) + if (vmdk_parent_open(bs) != 0) goto fail; // write the CID once after the image creation s->parent_cid = vmdk_read_cid(bs,1); @@ -583,15 +545,15 @@ static uint64_t get_cluster_offset(BlockDriverState *bs, VmdkMetaData *m_data, if (!cluster_offset) { if (!allocate) return 0; + // Avoid the L2 tables update for the images that have snapshots. - if (!s->is_parent) { - cluster_offset = bdrv_getlength(s->hd); - bdrv_truncate(s->hd, cluster_offset + (s->cluster_sectors << 9)); + cluster_offset = bdrv_getlength(s->hd); + bdrv_truncate(s->hd, cluster_offset + (s->cluster_sectors << 9)); + + cluster_offset >>= 9; + tmp = cpu_to_le32(cluster_offset); + l2_table[l2_index] = tmp; - cluster_offset >>= 9; - tmp = cpu_to_le32(cluster_offset); - l2_table[l2_index] = tmp; - } /* First of all we write grain itself, to avoid race condition * that may to corrupt the image. * This problem may occur because of insufficient space on host disk @@ -866,8 +828,6 @@ static void vmdk_close(BlockDriverState *bs) qemu_free(s->l1_table); qemu_free(s->l2_cache); - // try to close parent image, if exist - vmdk_parent_close(s->hd); bdrv_delete(s->hd); } |