diff options
Diffstat (limited to 'block-vmdk.c')
| -rw-r--r-- | block-vmdk.c | 834 |
1 files changed, 0 insertions, 834 deletions
diff --git a/block-vmdk.c b/block-vmdk.c deleted file mode 100644 index 8d67c2f..0000000 --- a/block-vmdk.c +++ /dev/null @@ -1,834 +0,0 @@ -/* - * Block driver for the VMDK format - * - * Copyright (c) 2004 Fabrice Bellard - * Copyright (c) 2005 Filip Navara - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#include "qemu-common.h" -#include "block_int.h" - -#define VMDK3_MAGIC (('C' << 24) | ('O' << 16) | ('W' << 8) | 'D') -#define VMDK4_MAGIC (('K' << 24) | ('D' << 16) | ('M' << 8) | 'V') - -typedef struct { - uint32_t version; - uint32_t flags; - uint32_t disk_sectors; - uint32_t granularity; - uint32_t l1dir_offset; - uint32_t l1dir_size; - uint32_t file_sectors; - uint32_t cylinders; - uint32_t heads; - uint32_t sectors_per_track; -} VMDK3Header; - -typedef struct { - uint32_t version; - uint32_t flags; - int64_t capacity; - int64_t granularity; - int64_t desc_offset; - int64_t desc_size; - int32_t num_gtes_per_gte; - int64_t rgd_offset; - int64_t gd_offset; - int64_t grain_offset; - char filler[1]; - char check_bytes[4]; -} __attribute__((packed)) VMDK4Header; - -#define L2_CACHE_SIZE 16 - -typedef struct BDRVVmdkState { - BlockDriverState *hd; - int64_t l1_table_offset; - int64_t l1_backup_table_offset; - uint32_t *l1_table; - uint32_t *l1_backup_table; - unsigned int l1_size; - uint32_t l1_entry_sectors; - - unsigned int l2_size; - uint32_t *l2_cache; - uint32_t l2_cache_offsets[L2_CACHE_SIZE]; - uint32_t l2_cache_counts[L2_CACHE_SIZE]; - - unsigned int cluster_sectors; - uint32_t parent_cid; - int is_parent; -} BDRVVmdkState; - -typedef struct VmdkMetaData { - uint32_t offset; - unsigned int l1_index; - unsigned int l2_index; - unsigned int l2_offset; - int valid; -} VmdkMetaData; - -typedef struct ActiveBDRVState{ - BlockDriverState *hd; // active image handler - uint64_t cluster_offset; // current write offset -}ActiveBDRVState; - -static ActiveBDRVState activeBDRV; - - -static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename) -{ - uint32_t magic; - - if (buf_size < 4) - return 0; - magic = be32_to_cpu(*(uint32_t *)buf); - if (magic == VMDK3_MAGIC || - magic == VMDK4_MAGIC) - return 100; - else - return 0; -} - -#define CHECK_CID 1 - -#define SECTOR_SIZE 512 -#define DESC_SIZE 20*SECTOR_SIZE // 20 sectors of 512 bytes each -#define HEADER_SIZE 512 // first sector of 512 bytes - -static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent) -{ - BDRVVmdkState *s = bs->opaque; - char desc[DESC_SIZE]; - uint32_t cid; - const char *p_name, *cid_str; - size_t cid_str_size; - - /* the descriptor offset = 0x200 */ - if (bdrv_pread(s->hd, 0x200, desc, DESC_SIZE) != DESC_SIZE) - return 0; - - if (parent) { - cid_str = "parentCID"; - cid_str_size = sizeof("parentCID"); - } else { - cid_str = "CID"; - cid_str_size = sizeof("CID"); - } - - if ((p_name = strstr(desc,cid_str)) != 0) { - p_name += cid_str_size; - sscanf(p_name,"%x",&cid); - } - - return cid; -} - -static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) -{ - BDRVVmdkState *s = bs->opaque; - char desc[DESC_SIZE], tmp_desc[DESC_SIZE]; - char *p_name, *tmp_str; - - /* the descriptor offset = 0x200 */ - if (bdrv_pread(s->hd, 0x200, desc, DESC_SIZE) != DESC_SIZE) - return -1; - - tmp_str = strstr(desc,"parentCID"); - pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str); - if ((p_name = strstr(desc,"CID")) != 0) { - p_name += sizeof("CID"); - snprintf(p_name, sizeof(desc) - (p_name - desc), "%x\n", cid); - pstrcat(desc, sizeof(desc), tmp_desc); - } - - if (bdrv_pwrite(s->hd, 0x200, desc, DESC_SIZE) != DESC_SIZE) - return -1; - return 0; -} - -static int vmdk_is_cid_valid(BlockDriverState *bs) -{ -#ifdef CHECK_CID - BDRVVmdkState *s = bs->opaque; - BlockDriverState *p_bs = s->hd->backing_hd; - uint32_t cur_pcid; - - if (p_bs) { - cur_pcid = vmdk_read_cid(p_bs,0); - if (s->parent_cid != cur_pcid) - // CID not valid - return 0; - } -#endif - // CID valid - return 1; -} - -static int vmdk_snapshot_create(const char *filename, const char *backing_file) -{ - int snp_fd, p_fd; - uint32_t p_cid; - char *p_name, *gd_buf, *rgd_buf; - const char *real_filename, *temp_str; - VMDK4Header header; - uint32_t gde_entries, gd_size; - int64_t gd_offset, rgd_offset, capacity, gt_size; - char p_desc[DESC_SIZE], s_desc[DESC_SIZE], hdr[HEADER_SIZE]; - static const char desc_template[] = - "# Disk DescriptorFile\n" - "version=1\n" - "CID=%x\n" - "parentCID=%x\n" - "createType=\"monolithicSparse\"\n" - "parentFileNameHint=\"%s\"\n" - "\n" - "# Extent description\n" - "RW %u SPARSE \"%s\"\n" - "\n" - "# The Disk Data Base \n" - "#DDB\n" - "\n"; - - snp_fd = open(filename, O_RDWR | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, 0644); - if (snp_fd < 0) - return -1; - p_fd = open(backing_file, O_RDONLY | O_BINARY | O_LARGEFILE); - if (p_fd < 0) { - close(snp_fd); - return -1; - } - - /* read the header */ - if (lseek(p_fd, 0x0, SEEK_SET) == -1) - goto fail; - if (read(p_fd, hdr, HEADER_SIZE) != HEADER_SIZE) - goto fail; - - /* write the header */ - if (lseek(snp_fd, 0x0, SEEK_SET) == -1) - goto fail; - if (write(snp_fd, hdr, HEADER_SIZE) == -1) - goto fail; - - memset(&header, 0, sizeof(header)); - memcpy(&header,&hdr[4], sizeof(header)); // skip the VMDK4_MAGIC - - ftruncate(snp_fd, header.grain_offset << 9); - /* the descriptor offset = 0x200 */ - if (lseek(p_fd, 0x200, SEEK_SET) == -1) - goto fail; - if (read(p_fd, p_desc, DESC_SIZE) != DESC_SIZE) - goto fail; - - if ((p_name = strstr(p_desc,"CID")) != 0) { - p_name += sizeof("CID"); - sscanf(p_name,"%x",&p_cid); - } - - real_filename = filename; - if ((temp_str = strrchr(real_filename, '\\')) != NULL) - real_filename = temp_str + 1; - if ((temp_str = strrchr(real_filename, '/')) != NULL) - real_filename = temp_str + 1; - if ((temp_str = strrchr(real_filename, ':')) != NULL) - real_filename = temp_str + 1; - - snprintf(s_desc, sizeof(s_desc), desc_template, p_cid, p_cid, backing_file, - (uint32_t)header.capacity, real_filename); - - /* write the descriptor */ - if (lseek(snp_fd, 0x200, SEEK_SET) == -1) - goto fail; - if (write(snp_fd, s_desc, strlen(s_desc)) == -1) - goto fail; - - gd_offset = header.gd_offset * SECTOR_SIZE; // offset of GD table - rgd_offset = header.rgd_offset * SECTOR_SIZE; // offset of RGD table - capacity = header.capacity * SECTOR_SIZE; // Extent size - /* - * Each GDE span 32M disk, means: - * 512 GTE per GT, each GTE points to grain - */ - gt_size = (int64_t)header.num_gtes_per_gte * header.granularity * SECTOR_SIZE; - if (!gt_size) - goto fail; - gde_entries = (uint32_t)(capacity / gt_size); // number of gde/rgde - gd_size = gde_entries * sizeof(uint32_t); - - /* write RGD */ - rgd_buf = qemu_malloc(gd_size); - if (!rgd_buf) - goto fail; - if (lseek(p_fd, rgd_offset, SEEK_SET) == -1) - goto fail_rgd; - if (read(p_fd, rgd_buf, gd_size) != gd_size) - goto fail_rgd; - if (lseek(snp_fd, rgd_offset, SEEK_SET) == -1) - goto fail_rgd; - if (write(snp_fd, rgd_buf, gd_size) == -1) - goto fail_rgd; - qemu_free(rgd_buf); - - /* write GD */ - gd_buf = qemu_malloc(gd_size); - if (!gd_buf) - goto fail_rgd; - if (lseek(p_fd, gd_offset, SEEK_SET) == -1) - goto fail_gd; - if (read(p_fd, gd_buf, gd_size) != gd_size) - goto fail_gd; - if (lseek(snp_fd, gd_offset, SEEK_SET) == -1) - goto fail_gd; - if (write(snp_fd, gd_buf, gd_size) == -1) - goto fail_gd; - qemu_free(gd_buf); - - close(p_fd); - close(snp_fd); - return 0; - - fail_gd: - qemu_free(gd_buf); - fail_rgd: - qemu_free(rgd_buf); - fail: - close(p_fd); - close(snp_fd); - return -1; -} - -static void vmdk_parent_close(BlockDriverState *bs) -{ - if (bs->backing_hd) - bdrv_close(bs->backing_hd); -} - -int parent_open = 0; -static int vmdk_parent_open(BlockDriverState *bs, const char * filename) -{ - 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) - return -1; - - if ((p_name = strstr(desc,"parentFileNameHint")) != 0) { - char *end_name; - struct stat file_buf; - - p_name += sizeof("parentFileNameHint") + 1; - if ((end_name = strchr(p_name,'\"')) == 0) - return -1; - if ((end_name - p_name) > sizeof (s->hd->backing_file) - 1) - return -1; - - strncpy(s->hd->backing_file, p_name, end_name - p_name); - if (stat(s->hd->backing_file, &file_buf) != 0) { - path_combine(parent_img_name, sizeof(parent_img_name), - filename, s->hd->backing_file); - } else { - pstrcpy(parent_img_name, sizeof(parent_img_name), - s->hd->backing_file); - } - - s->hd->backing_hd = bdrv_new(""); - if (!s->hd->backing_hd) { - failure: - bdrv_close(s->hd); - return -1; - } - parent_open = 1; - if (bdrv_open(s->hd->backing_hd, parent_img_name, BDRV_O_RDONLY) < 0) - goto failure; - parent_open = 0; - } - - return 0; -} - -static int vmdk_open(BlockDriverState *bs, const char *filename, int flags) -{ - BDRVVmdkState *s = bs->opaque; - uint32_t magic; - int l1_size, i, ret; - - if (parent_open) - // Parent must be opened as RO. - flags = BDRV_O_RDONLY; - - ret = bdrv_file_open(&s->hd, filename, flags); - if (ret < 0) - return ret; - if (bdrv_pread(s->hd, 0, &magic, sizeof(magic)) != sizeof(magic)) - goto fail; - - magic = be32_to_cpu(magic); - if (magic == VMDK3_MAGIC) { - VMDK3Header header; - - if (bdrv_pread(s->hd, sizeof(magic), &header, sizeof(header)) != sizeof(header)) - goto fail; - s->cluster_sectors = le32_to_cpu(header.granularity); - s->l2_size = 1 << 9; - s->l1_size = 1 << 6; - bs->total_sectors = le32_to_cpu(header.disk_sectors); - s->l1_table_offset = le32_to_cpu(header.l1dir_offset) << 9; - s->l1_backup_table_offset = 0; - s->l1_entry_sectors = s->l2_size * s->cluster_sectors; - } else if (magic == VMDK4_MAGIC) { - VMDK4Header header; - - if (bdrv_pread(s->hd, sizeof(magic), &header, sizeof(header)) != sizeof(header)) - goto fail; - bs->total_sectors = le64_to_cpu(header.capacity); - s->cluster_sectors = le64_to_cpu(header.granularity); - s->l2_size = le32_to_cpu(header.num_gtes_per_gte); - s->l1_entry_sectors = s->l2_size * s->cluster_sectors; - if (s->l1_entry_sectors <= 0) - goto fail; - s->l1_size = (bs->total_sectors + s->l1_entry_sectors - 1) - / s->l1_entry_sectors; - 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) - goto fail; - // write the CID once after the image creation - s->parent_cid = vmdk_read_cid(bs,1); - } else { - goto fail; - } - - /* read the L1 table */ - l1_size = s->l1_size * sizeof(uint32_t); - s->l1_table = qemu_malloc(l1_size); - if (!s->l1_table) - goto fail; - if (bdrv_pread(s->hd, s->l1_table_offset, s->l1_table, l1_size) != l1_size) - goto fail; - for(i = 0; i < s->l1_size; i++) { - le32_to_cpus(&s->l1_table[i]); - } - - if (s->l1_backup_table_offset) { - s->l1_backup_table = qemu_malloc(l1_size); - if (!s->l1_backup_table) - goto fail; - if (bdrv_pread(s->hd, s->l1_backup_table_offset, s->l1_backup_table, l1_size) != l1_size) - goto fail; - for(i = 0; i < s->l1_size; i++) { - le32_to_cpus(&s->l1_backup_table[i]); - } - } - - s->l2_cache = qemu_malloc(s->l2_size * L2_CACHE_SIZE * sizeof(uint32_t)); - if (!s->l2_cache) - goto fail; - return 0; - fail: - qemu_free(s->l1_backup_table); - qemu_free(s->l1_table); - qemu_free(s->l2_cache); - bdrv_delete(s->hd); - return -1; -} - -static uint64_t get_cluster_offset(BlockDriverState *bs, VmdkMetaData *m_data, - uint64_t offset, int allocate); - -static int get_whole_cluster(BlockDriverState *bs, uint64_t cluster_offset, - uint64_t offset, int allocate) -{ - uint64_t parent_cluster_offset; - BDRVVmdkState *s = bs->opaque; - uint8_t whole_grain[s->cluster_sectors*512]; // 128 sectors * 512 bytes each = grain size 64KB - - // we will be here if it's first write on non-exist grain(cluster). - // try to read from parent image, if exist - if (s->hd->backing_hd) { - BDRVVmdkState *ps = s->hd->backing_hd->opaque; - - if (!vmdk_is_cid_valid(bs)) - return -1; - - parent_cluster_offset = get_cluster_offset(s->hd->backing_hd, NULL, offset, allocate); - - if (parent_cluster_offset) { - BDRVVmdkState *act_s = activeBDRV.hd->opaque; - - if (bdrv_pread(ps->hd, parent_cluster_offset, whole_grain, ps->cluster_sectors*512) != ps->cluster_sectors*512) - return -1; - - //Write grain only into the active image - if (bdrv_pwrite(act_s->hd, activeBDRV.cluster_offset << 9, whole_grain, sizeof(whole_grain)) != sizeof(whole_grain)) - return -1; - } - } - return 0; -} - -static int vmdk_L2update(BlockDriverState *bs, VmdkMetaData *m_data) -{ - BDRVVmdkState *s = bs->opaque; - - /* update L2 table */ - if (bdrv_pwrite(s->hd, ((int64_t)m_data->l2_offset * 512) + (m_data->l2_index * sizeof(m_data->offset)), - &(m_data->offset), sizeof(m_data->offset)) != sizeof(m_data->offset)) - return -1; - /* update backup L2 table */ - if (s->l1_backup_table_offset != 0) { - m_data->l2_offset = s->l1_backup_table[m_data->l1_index]; - if (bdrv_pwrite(s->hd, ((int64_t)m_data->l2_offset * 512) + (m_data->l2_index * sizeof(m_data->offset)), - &(m_data->offset), sizeof(m_data->offset)) != sizeof(m_data->offset)) - return -1; - } - - return 0; -} - -static uint64_t get_cluster_offset(BlockDriverState *bs, VmdkMetaData *m_data, - uint64_t offset, int allocate) -{ - BDRVVmdkState *s = bs->opaque; - unsigned int l1_index, l2_offset, l2_index; - int min_index, i, j; - uint32_t min_count, *l2_table, tmp = 0; - uint64_t cluster_offset; - - if (m_data) - m_data->valid = 0; - - l1_index = (offset >> 9) / s->l1_entry_sectors; - if (l1_index >= s->l1_size) - return 0; - l2_offset = s->l1_table[l1_index]; - if (!l2_offset) - return 0; - for(i = 0; i < L2_CACHE_SIZE; i++) { - if (l2_offset == s->l2_cache_offsets[i]) { - /* increment the hit count */ - if (++s->l2_cache_counts[i] == 0xffffffff) { - for(j = 0; j < L2_CACHE_SIZE; j++) { - s->l2_cache_counts[j] >>= 1; - } - } - l2_table = s->l2_cache + (i * s->l2_size); - goto found; - } - } - /* not found: load a new entry in the least used one */ - min_index = 0; - min_count = 0xffffffff; - for(i = 0; i < L2_CACHE_SIZE; i++) { - if (s->l2_cache_counts[i] < min_count) { - min_count = s->l2_cache_counts[i]; - min_index = i; - } - } - l2_table = s->l2_cache + (min_index * s->l2_size); - if (bdrv_pread(s->hd, (int64_t)l2_offset * 512, l2_table, s->l2_size * sizeof(uint32_t)) != - s->l2_size * sizeof(uint32_t)) - return 0; - - s->l2_cache_offsets[min_index] = l2_offset; - s->l2_cache_counts[min_index] = 1; - found: - l2_index = ((offset >> 9) / s->cluster_sectors) % s->l2_size; - cluster_offset = le32_to_cpu(l2_table[l2_index]); - - 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 >>= 9; - tmp = cpu_to_le32(cluster_offset); - l2_table[l2_index] = tmp; - // Save the active image state - activeBDRV.cluster_offset = cluster_offset; - activeBDRV.hd = bs; - } - /* 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 - * or inappropriate VM shutdown. - */ - if (get_whole_cluster(bs, cluster_offset, offset, allocate) == -1) - return 0; - - if (m_data) { - m_data->offset = tmp; - m_data->l1_index = l1_index; - m_data->l2_index = l2_index; - m_data->l2_offset = l2_offset; - m_data->valid = 1; - } - } - cluster_offset <<= 9; - return cluster_offset; -} - -static int vmdk_is_allocated(BlockDriverState *bs, int64_t sector_num, - int nb_sectors, int *pnum) -{ - BDRVVmdkState *s = bs->opaque; - int index_in_cluster, n; - uint64_t cluster_offset; - - cluster_offset = get_cluster_offset(bs, NULL, sector_num << 9, 0); - index_in_cluster = sector_num % s->cluster_sectors; - n = s->cluster_sectors - index_in_cluster; - if (n > nb_sectors) - n = nb_sectors; - *pnum = n; - return (cluster_offset != 0); -} - -static int vmdk_read(BlockDriverState *bs, int64_t sector_num, - uint8_t *buf, int nb_sectors) -{ - BDRVVmdkState *s = bs->opaque; - int index_in_cluster, n, ret; - uint64_t cluster_offset; - - while (nb_sectors > 0) { - cluster_offset = get_cluster_offset(bs, NULL, sector_num << 9, 0); - index_in_cluster = sector_num % s->cluster_sectors; - n = s->cluster_sectors - index_in_cluster; - if (n > nb_sectors) - n = nb_sectors; - if (!cluster_offset) { - // try to read from parent image, if exist - if (s->hd->backing_hd) { - if (!vmdk_is_cid_valid(bs)) - return -1; - ret = bdrv_read(s->hd->backing_hd, sector_num, buf, n); - if (ret < 0) - return -1; - } else { - memset(buf, 0, 512 * n); - } - } else { - if(bdrv_pread(s->hd, cluster_offset + index_in_cluster * 512, buf, n * 512) != n * 512) - return -1; - } - nb_sectors -= n; - sector_num += n; - buf += n * 512; - } - return 0; -} - -static int vmdk_write(BlockDriverState *bs, int64_t sector_num, - const uint8_t *buf, int nb_sectors) -{ - BDRVVmdkState *s = bs->opaque; - VmdkMetaData m_data; - int index_in_cluster, n; - uint64_t cluster_offset; - static int cid_update = 0; - - if (sector_num > bs->total_sectors) { - fprintf(stderr, - "(VMDK) Wrong offset: sector_num=0x%" PRIx64 - " total_sectors=0x%" PRIx64 "\n", - sector_num, bs->total_sectors); - return -1; - } - - while (nb_sectors > 0) { - index_in_cluster = sector_num & (s->cluster_sectors - 1); - n = s->cluster_sectors - index_in_cluster; - if (n > nb_sectors) - n = nb_sectors; - cluster_offset = get_cluster_offset(bs, &m_data, sector_num << 9, 1); - if (!cluster_offset) - return -1; - - if (bdrv_pwrite(s->hd, cluster_offset + index_in_cluster * 512, buf, n * 512) != n * 512) - return -1; - if (m_data.valid) { - /* update L2 tables */ - if (vmdk_L2update(bs, &m_data) == -1) - return -1; - } - nb_sectors -= n; - sector_num += n; - buf += n * 512; - - // update CID on the first write every time the virtual disk is opened - if (!cid_update) { - vmdk_write_cid(bs, time(NULL)); - cid_update++; - } - } - return 0; -} - -static int vmdk_create(const char *filename, int64_t total_size, - const char *backing_file, int flags) -{ - int fd, i; - VMDK4Header header; - uint32_t tmp, magic, grains, gd_size, gt_size, gt_count; - static const char desc_template[] = - "# Disk DescriptorFile\n" - "version=1\n" - "CID=%x\n" - "parentCID=ffffffff\n" - "createType=\"monolithicSparse\"\n" - "\n" - "# Extent description\n" - "RW %lu SPARSE \"%s\"\n" - "\n" - "# The Disk Data Base \n" - "#DDB\n" - "\n" - "ddb.virtualHWVersion = \"%d\"\n" - "ddb.geometry.cylinders = \"%lu\"\n" - "ddb.geometry.heads = \"16\"\n" - "ddb.geometry.sectors = \"63\"\n" - "ddb.adapterType = \"ide\"\n"; - char desc[1024]; - const char *real_filename, *temp_str; - - /* XXX: add support for backing file */ - if (backing_file) { - return vmdk_snapshot_create(filename, backing_file); - } - - fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, - 0644); - if (fd < 0) - return -1; - magic = cpu_to_be32(VMDK4_MAGIC); - memset(&header, 0, sizeof(header)); - header.version = cpu_to_le32(1); - header.flags = cpu_to_le32(3); /* ?? */ - header.capacity = cpu_to_le64(total_size); - header.granularity = cpu_to_le64(128); - header.num_gtes_per_gte = cpu_to_le32(512); - - grains = (total_size + header.granularity - 1) / header.granularity; - gt_size = ((header.num_gtes_per_gte * sizeof(uint32_t)) + 511) >> 9; - gt_count = (grains + header.num_gtes_per_gte - 1) / header.num_gtes_per_gte; - gd_size = (gt_count * sizeof(uint32_t) + 511) >> 9; - - header.desc_offset = 1; - header.desc_size = 20; - header.rgd_offset = header.desc_offset + header.desc_size; - header.gd_offset = header.rgd_offset + gd_size + (gt_size * gt_count); - header.grain_offset = - ((header.gd_offset + gd_size + (gt_size * gt_count) + - header.granularity - 1) / header.granularity) * - header.granularity; - - header.desc_offset = cpu_to_le64(header.desc_offset); - header.desc_size = cpu_to_le64(header.desc_size); - header.rgd_offset = cpu_to_le64(header.rgd_offset); - header.gd_offset = cpu_to_le64(header.gd_offset); - header.grain_offset = cpu_to_le64(header.grain_offset); - - header.check_bytes[0] = 0xa; - header.check_bytes[1] = 0x20; - header.check_bytes[2] = 0xd; - header.check_bytes[3] = 0xa; - - /* write all the data */ - write(fd, &magic, sizeof(magic)); - write(fd, &header, sizeof(header)); - - ftruncate(fd, header.grain_offset << 9); - - /* write grain directory */ - lseek(fd, le64_to_cpu(header.rgd_offset) << 9, SEEK_SET); - for (i = 0, tmp = header.rgd_offset + gd_size; - i < gt_count; i++, tmp += gt_size) - write(fd, &tmp, sizeof(tmp)); - - /* write backup grain directory */ - lseek(fd, le64_to_cpu(header.gd_offset) << 9, SEEK_SET); - for (i = 0, tmp = header.gd_offset + gd_size; - i < gt_count; i++, tmp += gt_size) - write(fd, &tmp, sizeof(tmp)); - - /* compose the descriptor */ - real_filename = filename; - if ((temp_str = strrchr(real_filename, '\\')) != NULL) - real_filename = temp_str + 1; - if ((temp_str = strrchr(real_filename, '/')) != NULL) - real_filename = temp_str + 1; - if ((temp_str = strrchr(real_filename, ':')) != NULL) - real_filename = temp_str + 1; - snprintf(desc, sizeof(desc), desc_template, (unsigned int)time(NULL), - (unsigned long)total_size, real_filename, - (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4), total_size / (63 * 16)); - - /* write the descriptor */ - lseek(fd, le64_to_cpu(header.desc_offset) << 9, SEEK_SET); - write(fd, desc, strlen(desc)); - - close(fd); - return 0; -} - -static void vmdk_close(BlockDriverState *bs) -{ - BDRVVmdkState *s = bs->opaque; - - 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); -} - -static void vmdk_flush(BlockDriverState *bs) -{ - BDRVVmdkState *s = bs->opaque; - bdrv_flush(s->hd); -} - -BlockDriver bdrv_vmdk = { - "vmdk", - sizeof(BDRVVmdkState), - vmdk_probe, - vmdk_open, - vmdk_read, - vmdk_write, - vmdk_close, - vmdk_create, - vmdk_flush, - vmdk_is_allocated, -}; |