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-rw-r--r--block-vmdk.c446
1 files changed, 0 insertions, 446 deletions
diff --git a/block-vmdk.c b/block-vmdk.c
deleted file mode 100644
index 4cc3db8..0000000
--- a/block-vmdk.c
+++ /dev/null
@@ -1,446 +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 "vl.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 {
- int fd;
- 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;
-} BDRVVmdkState;
-
-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;
-}
-
-static int vmdk_open(BlockDriverState *bs, const char *filename)
-{
- BDRVVmdkState *s = bs->opaque;
- int fd, i;
- uint32_t magic;
- int l1_size;
-
- fd = open(filename, O_RDWR | O_BINARY | O_LARGEFILE);
- if (fd < 0) {
- fd = open(filename, O_RDONLY | O_BINARY | O_LARGEFILE);
- if (fd < 0)
- return -1;
- bs->read_only = 1;
- }
- if (read(fd, &magic, sizeof(magic)) != sizeof(magic))
- goto fail;
- magic = be32_to_cpu(magic);
- if (magic == VMDK3_MAGIC) {
- VMDK3Header header;
- if (read(fd, &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 (read(fd, &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;
- } 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 (lseek(fd, s->l1_table_offset, SEEK_SET) == -1)
- goto fail;
- if (read(fd, 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 (lseek(fd, s->l1_backup_table_offset, SEEK_SET) == -1)
- goto fail;
- if (read(fd, 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;
- s->fd = fd;
- return 0;
- fail:
- qemu_free(s->l1_backup_table);
- qemu_free(s->l1_table);
- qemu_free(s->l2_cache);
- close(fd);
- return -1;
-}
-
-static uint64_t get_cluster_offset(BlockDriverState *bs,
- 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;
- uint64_t cluster_offset;
-
- 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);
- lseek(s->fd, (int64_t)l2_offset * 512, SEEK_SET);
- if (read(s->fd, 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;
- cluster_offset = lseek(s->fd, 0, SEEK_END);
- ftruncate(s->fd, cluster_offset + (s->cluster_sectors << 9));
- cluster_offset >>= 9;
- /* update L2 table */
- tmp = cpu_to_le32(cluster_offset);
- l2_table[l2_index] = tmp;
- lseek(s->fd, ((int64_t)l2_offset * 512) + (l2_index * sizeof(tmp)), SEEK_SET);
- if (write(s->fd, &tmp, sizeof(tmp)) != sizeof(tmp))
- return 0;
- /* update backup L2 table */
- if (s->l1_backup_table_offset != 0) {
- l2_offset = s->l1_backup_table[l1_index];
- lseek(s->fd, ((int64_t)l2_offset * 512) + (l2_index * sizeof(tmp)), SEEK_SET);
- if (write(s->fd, &tmp, sizeof(tmp)) != sizeof(tmp))
- return 0;
- }
- }
- 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, 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 ret, index_in_cluster, n;
- uint64_t cluster_offset;
-
- while (nb_sectors > 0) {
- cluster_offset = get_cluster_offset(bs, 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) {
- memset(buf, 0, 512 * n);
- } else {
- lseek(s->fd, cluster_offset + index_in_cluster * 512, SEEK_SET);
- ret = read(s->fd, buf, n * 512);
- if (ret != 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;
- 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;
- if (n > nb_sectors)
- n = nb_sectors;
- cluster_offset = get_cluster_offset(bs, sector_num << 9, 1);
- if (!cluster_offset)
- return -1;
- lseek(s->fd, cluster_offset + index_in_cluster * 512, SEEK_SET);
- ret = write(s->fd, buf, n * 512);
- if (ret != n * 512)
- return -1;
- nb_sectors -= n;
- sector_num += n;
- buf += n * 512;
- }
- 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;
- 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 = \"3\"\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 */
-
- 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;
- sprintf(desc, desc_template, time(NULL), (unsigned long)total_size,
- real_filename, 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);
- close(s->fd);
-}
-
-static void vmdk_flush(BlockDriverState *bs)
-{
- BDRVVmdkState *s = bs->opaque;
- fsync(s->fd);
-}
-
-BlockDriver bdrv_vmdk = {
- "vmdk",
- sizeof(BDRVVmdkState),
- vmdk_probe,
- vmdk_open,
- vmdk_read,
- vmdk_write,
- vmdk_close,
- vmdk_create,
- vmdk_flush,
- vmdk_is_allocated,
-};
generated by cgit v1.1 at 2024-05-20 20:18:51 +0000