8393078032
Almost all drivers call bdrv_open_child() similarly. Let's create a
helper for this.
The only not updated drivers that call bdrv_open_child() to set
bs->file are raw-format and snapshot-access:
raw-format sometimes want to have filtered child but
don't set drv->is_filter to true.
snapshot-access wants only DATA | PRIMARY
Possibly we should implement drv->is_filter_func() handler, to consider
raw-format as filter when it works as filter.. But it's another story.
Note also, that we decrease assignments to bs->file in code: it helps
us restrict modifying this field in further commit.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220726201134.924743-3-vsementsov@yandex-team.ru>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
3149 lines
98 KiB
C
3149 lines
98 KiB
C
/*
|
|
* 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/osdep.h"
|
|
#include "qapi/error.h"
|
|
#include "block/block_int.h"
|
|
#include "sysemu/block-backend.h"
|
|
#include "qapi/qmp/qdict.h"
|
|
#include "qapi/qmp/qerror.h"
|
|
#include "qemu/error-report.h"
|
|
#include "qemu/module.h"
|
|
#include "qemu/option.h"
|
|
#include "qemu/bswap.h"
|
|
#include "qemu/memalign.h"
|
|
#include "migration/blocker.h"
|
|
#include "qemu/cutils.h"
|
|
#include <zlib.h>
|
|
|
|
#define VMDK3_MAGIC (('C' << 24) | ('O' << 16) | ('W' << 8) | 'D')
|
|
#define VMDK4_MAGIC (('K' << 24) | ('D' << 16) | ('M' << 8) | 'V')
|
|
#define VMDK4_COMPRESSION_DEFLATE 1
|
|
#define VMDK4_FLAG_NL_DETECT (1 << 0)
|
|
#define VMDK4_FLAG_RGD (1 << 1)
|
|
/* Zeroed-grain enable bit */
|
|
#define VMDK4_FLAG_ZERO_GRAIN (1 << 2)
|
|
#define VMDK4_FLAG_COMPRESS (1 << 16)
|
|
#define VMDK4_FLAG_MARKER (1 << 17)
|
|
#define VMDK4_GD_AT_END 0xffffffffffffffffULL
|
|
|
|
#define VMDK_EXTENT_MAX_SECTORS (1ULL << 32)
|
|
|
|
#define VMDK_GTE_ZEROED 0x1
|
|
|
|
/* VMDK internal error codes */
|
|
#define VMDK_OK 0
|
|
#define VMDK_ERROR (-1)
|
|
/* Cluster not allocated */
|
|
#define VMDK_UNALLOC (-2)
|
|
#define VMDK_ZEROED (-3)
|
|
|
|
#define BLOCK_OPT_ZEROED_GRAIN "zeroed_grain"
|
|
#define BLOCK_OPT_TOOLSVERSION "toolsversion"
|
|
|
|
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;
|
|
} QEMU_PACKED VMDK3Header;
|
|
|
|
typedef struct {
|
|
uint32_t version;
|
|
uint32_t flags;
|
|
uint64_t capacity;
|
|
uint64_t granularity;
|
|
uint64_t desc_offset;
|
|
uint64_t desc_size;
|
|
/* Number of GrainTableEntries per GrainTable */
|
|
uint32_t num_gtes_per_gt;
|
|
uint64_t rgd_offset;
|
|
uint64_t gd_offset;
|
|
uint64_t grain_offset;
|
|
char filler[1];
|
|
char check_bytes[4];
|
|
uint16_t compressAlgorithm;
|
|
} QEMU_PACKED VMDK4Header;
|
|
|
|
typedef struct VMDKSESparseConstHeader {
|
|
uint64_t magic;
|
|
uint64_t version;
|
|
uint64_t capacity;
|
|
uint64_t grain_size;
|
|
uint64_t grain_table_size;
|
|
uint64_t flags;
|
|
uint64_t reserved1;
|
|
uint64_t reserved2;
|
|
uint64_t reserved3;
|
|
uint64_t reserved4;
|
|
uint64_t volatile_header_offset;
|
|
uint64_t volatile_header_size;
|
|
uint64_t journal_header_offset;
|
|
uint64_t journal_header_size;
|
|
uint64_t journal_offset;
|
|
uint64_t journal_size;
|
|
uint64_t grain_dir_offset;
|
|
uint64_t grain_dir_size;
|
|
uint64_t grain_tables_offset;
|
|
uint64_t grain_tables_size;
|
|
uint64_t free_bitmap_offset;
|
|
uint64_t free_bitmap_size;
|
|
uint64_t backmap_offset;
|
|
uint64_t backmap_size;
|
|
uint64_t grains_offset;
|
|
uint64_t grains_size;
|
|
uint8_t pad[304];
|
|
} QEMU_PACKED VMDKSESparseConstHeader;
|
|
|
|
typedef struct VMDKSESparseVolatileHeader {
|
|
uint64_t magic;
|
|
uint64_t free_gt_number;
|
|
uint64_t next_txn_seq_number;
|
|
uint64_t replay_journal;
|
|
uint8_t pad[480];
|
|
} QEMU_PACKED VMDKSESparseVolatileHeader;
|
|
|
|
#define L2_CACHE_SIZE 16
|
|
|
|
typedef struct VmdkExtent {
|
|
BdrvChild *file;
|
|
bool flat;
|
|
bool compressed;
|
|
bool has_marker;
|
|
bool has_zero_grain;
|
|
bool sesparse;
|
|
uint64_t sesparse_l2_tables_offset;
|
|
uint64_t sesparse_clusters_offset;
|
|
int32_t entry_size;
|
|
int version;
|
|
int64_t sectors;
|
|
int64_t end_sector;
|
|
int64_t flat_start_offset;
|
|
int64_t l1_table_offset;
|
|
int64_t l1_backup_table_offset;
|
|
void *l1_table;
|
|
uint32_t *l1_backup_table;
|
|
unsigned int l1_size;
|
|
uint32_t l1_entry_sectors;
|
|
|
|
unsigned int l2_size;
|
|
void *l2_cache;
|
|
uint32_t l2_cache_offsets[L2_CACHE_SIZE];
|
|
uint32_t l2_cache_counts[L2_CACHE_SIZE];
|
|
|
|
int64_t cluster_sectors;
|
|
int64_t next_cluster_sector;
|
|
char *type;
|
|
} VmdkExtent;
|
|
|
|
typedef struct BDRVVmdkState {
|
|
CoMutex lock;
|
|
uint64_t desc_offset;
|
|
bool cid_updated;
|
|
bool cid_checked;
|
|
uint32_t cid;
|
|
uint32_t parent_cid;
|
|
int num_extents;
|
|
/* Extent array with num_extents entries, ascend ordered by address */
|
|
VmdkExtent *extents;
|
|
Error *migration_blocker;
|
|
char *create_type;
|
|
} BDRVVmdkState;
|
|
|
|
typedef struct BDRVVmdkReopenState {
|
|
bool *extents_using_bs_file;
|
|
} BDRVVmdkReopenState;
|
|
|
|
typedef struct VmdkMetaData {
|
|
unsigned int l1_index;
|
|
unsigned int l2_index;
|
|
unsigned int l2_offset;
|
|
bool new_allocation;
|
|
uint32_t *l2_cache_entry;
|
|
} VmdkMetaData;
|
|
|
|
typedef struct VmdkGrainMarker {
|
|
uint64_t lba;
|
|
uint32_t size;
|
|
uint8_t data[];
|
|
} QEMU_PACKED VmdkGrainMarker;
|
|
|
|
enum {
|
|
MARKER_END_OF_STREAM = 0,
|
|
MARKER_GRAIN_TABLE = 1,
|
|
MARKER_GRAIN_DIRECTORY = 2,
|
|
MARKER_FOOTER = 3,
|
|
};
|
|
|
|
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 {
|
|
const char *p = (const char *)buf;
|
|
const char *end = p + buf_size;
|
|
while (p < end) {
|
|
if (*p == '#') {
|
|
/* skip comment line */
|
|
while (p < end && *p != '\n') {
|
|
p++;
|
|
}
|
|
p++;
|
|
continue;
|
|
}
|
|
if (*p == ' ') {
|
|
while (p < end && *p == ' ') {
|
|
p++;
|
|
}
|
|
/* skip '\r' if windows line endings used. */
|
|
if (p < end && *p == '\r') {
|
|
p++;
|
|
}
|
|
/* only accept blank lines before 'version=' line */
|
|
if (p == end || *p != '\n') {
|
|
return 0;
|
|
}
|
|
p++;
|
|
continue;
|
|
}
|
|
if (end - p >= strlen("version=X\n")) {
|
|
if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 ||
|
|
strncmp("version=2\n", p, strlen("version=2\n")) == 0 ||
|
|
strncmp("version=3\n", p, strlen("version=3\n")) == 0) {
|
|
return 100;
|
|
}
|
|
}
|
|
if (end - p >= strlen("version=X\r\n")) {
|
|
if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 ||
|
|
strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0 ||
|
|
strncmp("version=3\r\n", p, strlen("version=3\r\n")) == 0) {
|
|
return 100;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
#define SECTOR_SIZE 512
|
|
#define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */
|
|
#define BUF_SIZE 4096
|
|
#define HEADER_SIZE 512 /* first sector of 512 bytes */
|
|
|
|
static void vmdk_free_extents(BlockDriverState *bs)
|
|
{
|
|
int i;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
VmdkExtent *e;
|
|
|
|
for (i = 0; i < s->num_extents; i++) {
|
|
e = &s->extents[i];
|
|
g_free(e->l1_table);
|
|
g_free(e->l2_cache);
|
|
g_free(e->l1_backup_table);
|
|
g_free(e->type);
|
|
if (e->file != bs->file) {
|
|
bdrv_unref_child(bs, e->file);
|
|
}
|
|
}
|
|
g_free(s->extents);
|
|
}
|
|
|
|
static void vmdk_free_last_extent(BlockDriverState *bs)
|
|
{
|
|
BDRVVmdkState *s = bs->opaque;
|
|
|
|
if (s->num_extents == 0) {
|
|
return;
|
|
}
|
|
s->num_extents--;
|
|
s->extents = g_renew(VmdkExtent, s->extents, s->num_extents);
|
|
}
|
|
|
|
/* Return -ve errno, or 0 on success and write CID into *pcid. */
|
|
static int vmdk_read_cid(BlockDriverState *bs, int parent, uint32_t *pcid)
|
|
{
|
|
char *desc;
|
|
uint32_t cid;
|
|
const char *p_name, *cid_str;
|
|
size_t cid_str_size;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
int ret;
|
|
|
|
desc = g_malloc0(DESC_SIZE);
|
|
ret = bdrv_pread(bs->file, s->desc_offset, DESC_SIZE, desc, 0);
|
|
if (ret < 0) {
|
|
goto out;
|
|
}
|
|
|
|
if (parent) {
|
|
cid_str = "parentCID";
|
|
cid_str_size = sizeof("parentCID");
|
|
} else {
|
|
cid_str = "CID";
|
|
cid_str_size = sizeof("CID");
|
|
}
|
|
|
|
desc[DESC_SIZE - 1] = '\0';
|
|
p_name = strstr(desc, cid_str);
|
|
if (p_name == NULL) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
p_name += cid_str_size;
|
|
if (sscanf(p_name, "%" SCNx32, &cid) != 1) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
*pcid = cid;
|
|
ret = 0;
|
|
|
|
out:
|
|
g_free(desc);
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid)
|
|
{
|
|
char *desc, *tmp_desc;
|
|
char *p_name, *tmp_str;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
int ret = 0;
|
|
|
|
desc = g_malloc0(DESC_SIZE);
|
|
tmp_desc = g_malloc0(DESC_SIZE);
|
|
ret = bdrv_pread(bs->file, s->desc_offset, DESC_SIZE, desc, 0);
|
|
if (ret < 0) {
|
|
goto out;
|
|
}
|
|
|
|
desc[DESC_SIZE - 1] = '\0';
|
|
tmp_str = strstr(desc, "parentCID");
|
|
if (tmp_str == NULL) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
pstrcpy(tmp_desc, DESC_SIZE, tmp_str);
|
|
p_name = strstr(desc, "CID");
|
|
if (p_name != NULL) {
|
|
p_name += sizeof("CID");
|
|
snprintf(p_name, DESC_SIZE - (p_name - desc), "%" PRIx32 "\n", cid);
|
|
pstrcat(desc, DESC_SIZE, tmp_desc);
|
|
}
|
|
|
|
ret = bdrv_pwrite_sync(bs->file, s->desc_offset, DESC_SIZE, desc, 0);
|
|
|
|
out:
|
|
g_free(desc);
|
|
g_free(tmp_desc);
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_is_cid_valid(BlockDriverState *bs)
|
|
{
|
|
BDRVVmdkState *s = bs->opaque;
|
|
uint32_t cur_pcid;
|
|
|
|
if (!s->cid_checked && bs->backing) {
|
|
BlockDriverState *p_bs = bs->backing->bs;
|
|
|
|
if (strcmp(p_bs->drv->format_name, "vmdk")) {
|
|
/* Backing file is not in vmdk format, so it does not have
|
|
* a CID, which makes the overlay's parent CID invalid */
|
|
return 0;
|
|
}
|
|
|
|
if (vmdk_read_cid(p_bs, 0, &cur_pcid) != 0) {
|
|
/* read failure: report as not valid */
|
|
return 0;
|
|
}
|
|
if (s->parent_cid != cur_pcid) {
|
|
/* CID not valid */
|
|
return 0;
|
|
}
|
|
}
|
|
s->cid_checked = true;
|
|
/* CID valid */
|
|
return 1;
|
|
}
|
|
|
|
static int vmdk_reopen_prepare(BDRVReopenState *state,
|
|
BlockReopenQueue *queue, Error **errp)
|
|
{
|
|
BDRVVmdkState *s;
|
|
BDRVVmdkReopenState *rs;
|
|
int i;
|
|
|
|
assert(state != NULL);
|
|
assert(state->bs != NULL);
|
|
assert(state->opaque == NULL);
|
|
|
|
s = state->bs->opaque;
|
|
|
|
rs = g_new0(BDRVVmdkReopenState, 1);
|
|
state->opaque = rs;
|
|
|
|
/*
|
|
* Check whether there are any extents stored in bs->file; if bs->file
|
|
* changes, we will need to update their .file pointers to follow suit
|
|
*/
|
|
rs->extents_using_bs_file = g_new(bool, s->num_extents);
|
|
for (i = 0; i < s->num_extents; i++) {
|
|
rs->extents_using_bs_file[i] = s->extents[i].file == state->bs->file;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void vmdk_reopen_clean(BDRVReopenState *state)
|
|
{
|
|
BDRVVmdkReopenState *rs = state->opaque;
|
|
|
|
g_free(rs->extents_using_bs_file);
|
|
g_free(rs);
|
|
state->opaque = NULL;
|
|
}
|
|
|
|
static void vmdk_reopen_commit(BDRVReopenState *state)
|
|
{
|
|
BDRVVmdkState *s = state->bs->opaque;
|
|
BDRVVmdkReopenState *rs = state->opaque;
|
|
int i;
|
|
|
|
for (i = 0; i < s->num_extents; i++) {
|
|
if (rs->extents_using_bs_file[i]) {
|
|
s->extents[i].file = state->bs->file;
|
|
}
|
|
}
|
|
|
|
vmdk_reopen_clean(state);
|
|
}
|
|
|
|
static void vmdk_reopen_abort(BDRVReopenState *state)
|
|
{
|
|
vmdk_reopen_clean(state);
|
|
}
|
|
|
|
static int vmdk_parent_open(BlockDriverState *bs)
|
|
{
|
|
char *p_name;
|
|
char *desc;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
int ret;
|
|
|
|
desc = g_malloc0(DESC_SIZE + 1);
|
|
ret = bdrv_pread(bs->file, s->desc_offset, DESC_SIZE, desc, 0);
|
|
if (ret < 0) {
|
|
goto out;
|
|
}
|
|
|
|
p_name = strstr(desc, "parentFileNameHint");
|
|
if (p_name != NULL) {
|
|
char *end_name;
|
|
|
|
p_name += sizeof("parentFileNameHint") + 1;
|
|
end_name = strchr(p_name, '\"');
|
|
if (end_name == NULL) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
if ((end_name - p_name) > sizeof(bs->auto_backing_file) - 1) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
pstrcpy(bs->auto_backing_file, end_name - p_name + 1, p_name);
|
|
pstrcpy(bs->backing_file, sizeof(bs->backing_file),
|
|
bs->auto_backing_file);
|
|
pstrcpy(bs->backing_format, sizeof(bs->backing_format),
|
|
"vmdk");
|
|
}
|
|
|
|
out:
|
|
g_free(desc);
|
|
return ret;
|
|
}
|
|
|
|
/* Create and append extent to the extent array. Return the added VmdkExtent
|
|
* address. return NULL if allocation failed. */
|
|
static int vmdk_add_extent(BlockDriverState *bs,
|
|
BdrvChild *file, bool flat, int64_t sectors,
|
|
int64_t l1_offset, int64_t l1_backup_offset,
|
|
uint32_t l1_size,
|
|
int l2_size, uint64_t cluster_sectors,
|
|
VmdkExtent **new_extent,
|
|
Error **errp)
|
|
{
|
|
VmdkExtent *extent;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
int64_t nb_sectors;
|
|
|
|
if (cluster_sectors > 0x200000) {
|
|
/* 0x200000 * 512Bytes = 1GB for one cluster is unrealistic */
|
|
error_setg(errp, "Invalid granularity, image may be corrupt");
|
|
return -EFBIG;
|
|
}
|
|
if (l1_size > 32 * 1024 * 1024) {
|
|
/*
|
|
* Although with big capacity and small l1_entry_sectors, we can get a
|
|
* big l1_size, we don't want unbounded value to allocate the table.
|
|
* Limit it to 32M, which is enough to store:
|
|
* 8TB - for both VMDK3 & VMDK4 with
|
|
* minimal cluster size: 512B
|
|
* minimal L2 table size: 512 entries
|
|
* 8 TB is still more than the maximal value supported for
|
|
* VMDK3 & VMDK4 which is 2TB.
|
|
* 64TB - for "ESXi seSparse Extent"
|
|
* minimal cluster size: 512B (default is 4KB)
|
|
* L2 table size: 4096 entries (const).
|
|
* 64TB is more than the maximal value supported for
|
|
* seSparse VMDKs (which is slightly less than 64TB)
|
|
*/
|
|
error_setg(errp, "L1 size too big");
|
|
return -EFBIG;
|
|
}
|
|
|
|
nb_sectors = bdrv_nb_sectors(file->bs);
|
|
if (nb_sectors < 0) {
|
|
return nb_sectors;
|
|
}
|
|
|
|
s->extents = g_renew(VmdkExtent, s->extents, s->num_extents + 1);
|
|
extent = &s->extents[s->num_extents];
|
|
s->num_extents++;
|
|
|
|
memset(extent, 0, sizeof(VmdkExtent));
|
|
extent->file = file;
|
|
extent->flat = flat;
|
|
extent->sectors = sectors;
|
|
extent->l1_table_offset = l1_offset;
|
|
extent->l1_backup_table_offset = l1_backup_offset;
|
|
extent->l1_size = l1_size;
|
|
extent->l1_entry_sectors = l2_size * cluster_sectors;
|
|
extent->l2_size = l2_size;
|
|
extent->cluster_sectors = flat ? sectors : cluster_sectors;
|
|
extent->next_cluster_sector = ROUND_UP(nb_sectors, cluster_sectors);
|
|
extent->entry_size = sizeof(uint32_t);
|
|
|
|
if (s->num_extents > 1) {
|
|
extent->end_sector = (*(extent - 1)).end_sector + extent->sectors;
|
|
} else {
|
|
extent->end_sector = extent->sectors;
|
|
}
|
|
bs->total_sectors = extent->end_sector;
|
|
if (new_extent) {
|
|
*new_extent = extent;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent,
|
|
Error **errp)
|
|
{
|
|
int ret;
|
|
size_t l1_size;
|
|
int i;
|
|
|
|
/* read the L1 table */
|
|
l1_size = extent->l1_size * extent->entry_size;
|
|
extent->l1_table = g_try_malloc(l1_size);
|
|
if (l1_size && extent->l1_table == NULL) {
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ret = bdrv_pread(extent->file, extent->l1_table_offset, l1_size,
|
|
extent->l1_table, 0);
|
|
if (ret < 0) {
|
|
bdrv_refresh_filename(extent->file->bs);
|
|
error_setg_errno(errp, -ret,
|
|
"Could not read l1 table from extent '%s'",
|
|
extent->file->bs->filename);
|
|
goto fail_l1;
|
|
}
|
|
for (i = 0; i < extent->l1_size; i++) {
|
|
if (extent->entry_size == sizeof(uint64_t)) {
|
|
le64_to_cpus((uint64_t *)extent->l1_table + i);
|
|
} else {
|
|
assert(extent->entry_size == sizeof(uint32_t));
|
|
le32_to_cpus((uint32_t *)extent->l1_table + i);
|
|
}
|
|
}
|
|
|
|
if (extent->l1_backup_table_offset) {
|
|
assert(!extent->sesparse);
|
|
extent->l1_backup_table = g_try_malloc(l1_size);
|
|
if (l1_size && extent->l1_backup_table == NULL) {
|
|
ret = -ENOMEM;
|
|
goto fail_l1;
|
|
}
|
|
ret = bdrv_pread(extent->file, extent->l1_backup_table_offset,
|
|
l1_size, extent->l1_backup_table, 0);
|
|
if (ret < 0) {
|
|
bdrv_refresh_filename(extent->file->bs);
|
|
error_setg_errno(errp, -ret,
|
|
"Could not read l1 backup table from extent '%s'",
|
|
extent->file->bs->filename);
|
|
goto fail_l1b;
|
|
}
|
|
for (i = 0; i < extent->l1_size; i++) {
|
|
le32_to_cpus(&extent->l1_backup_table[i]);
|
|
}
|
|
}
|
|
|
|
extent->l2_cache =
|
|
g_malloc(extent->entry_size * extent->l2_size * L2_CACHE_SIZE);
|
|
return 0;
|
|
fail_l1b:
|
|
g_free(extent->l1_backup_table);
|
|
fail_l1:
|
|
g_free(extent->l1_table);
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_open_vmfs_sparse(BlockDriverState *bs,
|
|
BdrvChild *file,
|
|
int flags, Error **errp)
|
|
{
|
|
int ret;
|
|
uint32_t magic;
|
|
VMDK3Header header;
|
|
VmdkExtent *extent = NULL;
|
|
|
|
ret = bdrv_pread(file, sizeof(magic), sizeof(header), &header, 0);
|
|
if (ret < 0) {
|
|
bdrv_refresh_filename(file->bs);
|
|
error_setg_errno(errp, -ret,
|
|
"Could not read header from file '%s'",
|
|
file->bs->filename);
|
|
return ret;
|
|
}
|
|
ret = vmdk_add_extent(bs, file, false,
|
|
le32_to_cpu(header.disk_sectors),
|
|
(int64_t)le32_to_cpu(header.l1dir_offset) << 9,
|
|
0,
|
|
le32_to_cpu(header.l1dir_size),
|
|
4096,
|
|
le32_to_cpu(header.granularity),
|
|
&extent,
|
|
errp);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
ret = vmdk_init_tables(bs, extent, errp);
|
|
if (ret) {
|
|
/* free extent allocated by vmdk_add_extent */
|
|
vmdk_free_last_extent(bs);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
#define SESPARSE_CONST_HEADER_MAGIC UINT64_C(0x00000000cafebabe)
|
|
#define SESPARSE_VOLATILE_HEADER_MAGIC UINT64_C(0x00000000cafecafe)
|
|
|
|
/* Strict checks - format not officially documented */
|
|
static int check_se_sparse_const_header(VMDKSESparseConstHeader *header,
|
|
Error **errp)
|
|
{
|
|
header->magic = le64_to_cpu(header->magic);
|
|
header->version = le64_to_cpu(header->version);
|
|
header->grain_size = le64_to_cpu(header->grain_size);
|
|
header->grain_table_size = le64_to_cpu(header->grain_table_size);
|
|
header->flags = le64_to_cpu(header->flags);
|
|
header->reserved1 = le64_to_cpu(header->reserved1);
|
|
header->reserved2 = le64_to_cpu(header->reserved2);
|
|
header->reserved3 = le64_to_cpu(header->reserved3);
|
|
header->reserved4 = le64_to_cpu(header->reserved4);
|
|
|
|
header->volatile_header_offset =
|
|
le64_to_cpu(header->volatile_header_offset);
|
|
header->volatile_header_size = le64_to_cpu(header->volatile_header_size);
|
|
|
|
header->journal_header_offset = le64_to_cpu(header->journal_header_offset);
|
|
header->journal_header_size = le64_to_cpu(header->journal_header_size);
|
|
|
|
header->journal_offset = le64_to_cpu(header->journal_offset);
|
|
header->journal_size = le64_to_cpu(header->journal_size);
|
|
|
|
header->grain_dir_offset = le64_to_cpu(header->grain_dir_offset);
|
|
header->grain_dir_size = le64_to_cpu(header->grain_dir_size);
|
|
|
|
header->grain_tables_offset = le64_to_cpu(header->grain_tables_offset);
|
|
header->grain_tables_size = le64_to_cpu(header->grain_tables_size);
|
|
|
|
header->free_bitmap_offset = le64_to_cpu(header->free_bitmap_offset);
|
|
header->free_bitmap_size = le64_to_cpu(header->free_bitmap_size);
|
|
|
|
header->backmap_offset = le64_to_cpu(header->backmap_offset);
|
|
header->backmap_size = le64_to_cpu(header->backmap_size);
|
|
|
|
header->grains_offset = le64_to_cpu(header->grains_offset);
|
|
header->grains_size = le64_to_cpu(header->grains_size);
|
|
|
|
if (header->magic != SESPARSE_CONST_HEADER_MAGIC) {
|
|
error_setg(errp, "Bad const header magic: 0x%016" PRIx64,
|
|
header->magic);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (header->version != 0x0000000200000001) {
|
|
error_setg(errp, "Unsupported version: 0x%016" PRIx64,
|
|
header->version);
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
if (header->grain_size != 8) {
|
|
error_setg(errp, "Unsupported grain size: %" PRIu64,
|
|
header->grain_size);
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
if (header->grain_table_size != 64) {
|
|
error_setg(errp, "Unsupported grain table size: %" PRIu64,
|
|
header->grain_table_size);
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
if (header->flags != 0) {
|
|
error_setg(errp, "Unsupported flags: 0x%016" PRIx64,
|
|
header->flags);
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
if (header->reserved1 != 0 || header->reserved2 != 0 ||
|
|
header->reserved3 != 0 || header->reserved4 != 0) {
|
|
error_setg(errp, "Unsupported reserved bits:"
|
|
" 0x%016" PRIx64 " 0x%016" PRIx64
|
|
" 0x%016" PRIx64 " 0x%016" PRIx64,
|
|
header->reserved1, header->reserved2,
|
|
header->reserved3, header->reserved4);
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
/* check that padding is 0 */
|
|
if (!buffer_is_zero(header->pad, sizeof(header->pad))) {
|
|
error_setg(errp, "Unsupported non-zero const header padding");
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int check_se_sparse_volatile_header(VMDKSESparseVolatileHeader *header,
|
|
Error **errp)
|
|
{
|
|
header->magic = le64_to_cpu(header->magic);
|
|
header->free_gt_number = le64_to_cpu(header->free_gt_number);
|
|
header->next_txn_seq_number = le64_to_cpu(header->next_txn_seq_number);
|
|
header->replay_journal = le64_to_cpu(header->replay_journal);
|
|
|
|
if (header->magic != SESPARSE_VOLATILE_HEADER_MAGIC) {
|
|
error_setg(errp, "Bad volatile header magic: 0x%016" PRIx64,
|
|
header->magic);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (header->replay_journal) {
|
|
error_setg(errp, "Image is dirty, Replaying journal not supported");
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
/* check that padding is 0 */
|
|
if (!buffer_is_zero(header->pad, sizeof(header->pad))) {
|
|
error_setg(errp, "Unsupported non-zero volatile header padding");
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vmdk_open_se_sparse(BlockDriverState *bs,
|
|
BdrvChild *file,
|
|
int flags, Error **errp)
|
|
{
|
|
int ret;
|
|
VMDKSESparseConstHeader const_header;
|
|
VMDKSESparseVolatileHeader volatile_header;
|
|
VmdkExtent *extent = NULL;
|
|
|
|
ret = bdrv_apply_auto_read_only(bs,
|
|
"No write support for seSparse images available", errp);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
assert(sizeof(const_header) == SECTOR_SIZE);
|
|
|
|
ret = bdrv_pread(file, 0, sizeof(const_header), &const_header, 0);
|
|
if (ret < 0) {
|
|
bdrv_refresh_filename(file->bs);
|
|
error_setg_errno(errp, -ret,
|
|
"Could not read const header from file '%s'",
|
|
file->bs->filename);
|
|
return ret;
|
|
}
|
|
|
|
/* check const header */
|
|
ret = check_se_sparse_const_header(&const_header, errp);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
assert(sizeof(volatile_header) == SECTOR_SIZE);
|
|
|
|
ret = bdrv_pread(file, const_header.volatile_header_offset * SECTOR_SIZE,
|
|
sizeof(volatile_header), &volatile_header, 0);
|
|
if (ret < 0) {
|
|
bdrv_refresh_filename(file->bs);
|
|
error_setg_errno(errp, -ret,
|
|
"Could not read volatile header from file '%s'",
|
|
file->bs->filename);
|
|
return ret;
|
|
}
|
|
|
|
/* check volatile header */
|
|
ret = check_se_sparse_volatile_header(&volatile_header, errp);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
ret = vmdk_add_extent(bs, file, false,
|
|
const_header.capacity,
|
|
const_header.grain_dir_offset * SECTOR_SIZE,
|
|
0,
|
|
const_header.grain_dir_size *
|
|
SECTOR_SIZE / sizeof(uint64_t),
|
|
const_header.grain_table_size *
|
|
SECTOR_SIZE / sizeof(uint64_t),
|
|
const_header.grain_size,
|
|
&extent,
|
|
errp);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
extent->sesparse = true;
|
|
extent->sesparse_l2_tables_offset = const_header.grain_tables_offset;
|
|
extent->sesparse_clusters_offset = const_header.grains_offset;
|
|
extent->entry_size = sizeof(uint64_t);
|
|
|
|
ret = vmdk_init_tables(bs, extent, errp);
|
|
if (ret) {
|
|
/* free extent allocated by vmdk_add_extent */
|
|
vmdk_free_last_extent(bs);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf,
|
|
QDict *options, Error **errp);
|
|
|
|
static char *vmdk_read_desc(BdrvChild *file, uint64_t desc_offset, Error **errp)
|
|
{
|
|
int64_t size;
|
|
char *buf;
|
|
int ret;
|
|
|
|
size = bdrv_getlength(file->bs);
|
|
if (size < 0) {
|
|
error_setg_errno(errp, -size, "Could not access file");
|
|
return NULL;
|
|
}
|
|
|
|
if (size < 4) {
|
|
/* Both descriptor file and sparse image must be much larger than 4
|
|
* bytes, also callers of vmdk_read_desc want to compare the first 4
|
|
* bytes with VMDK4_MAGIC, let's error out if less is read. */
|
|
error_setg(errp, "File is too small, not a valid image");
|
|
return NULL;
|
|
}
|
|
|
|
size = MIN(size, (1 << 20) - 1); /* avoid unbounded allocation */
|
|
buf = g_malloc(size + 1);
|
|
|
|
ret = bdrv_pread(file, desc_offset, size, buf, 0);
|
|
if (ret < 0) {
|
|
error_setg_errno(errp, -ret, "Could not read from file");
|
|
g_free(buf);
|
|
return NULL;
|
|
}
|
|
buf[size] = 0;
|
|
|
|
return buf;
|
|
}
|
|
|
|
static int vmdk_open_vmdk4(BlockDriverState *bs,
|
|
BdrvChild *file,
|
|
int flags, QDict *options, Error **errp)
|
|
{
|
|
int ret;
|
|
uint32_t magic;
|
|
uint32_t l1_size, l1_entry_sectors;
|
|
VMDK4Header header;
|
|
VmdkExtent *extent = NULL;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
int64_t l1_backup_offset = 0;
|
|
bool compressed;
|
|
|
|
ret = bdrv_pread(file, sizeof(magic), sizeof(header), &header, 0);
|
|
if (ret < 0) {
|
|
bdrv_refresh_filename(file->bs);
|
|
error_setg_errno(errp, -ret,
|
|
"Could not read header from file '%s'",
|
|
file->bs->filename);
|
|
return -EINVAL;
|
|
}
|
|
if (header.capacity == 0) {
|
|
uint64_t desc_offset = le64_to_cpu(header.desc_offset);
|
|
if (desc_offset) {
|
|
char *buf = vmdk_read_desc(file, desc_offset << 9, errp);
|
|
if (!buf) {
|
|
return -EINVAL;
|
|
}
|
|
ret = vmdk_open_desc_file(bs, flags, buf, options, errp);
|
|
g_free(buf);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (!s->create_type) {
|
|
s->create_type = g_strdup("monolithicSparse");
|
|
}
|
|
|
|
if (le64_to_cpu(header.gd_offset) == VMDK4_GD_AT_END) {
|
|
/*
|
|
* The footer takes precedence over the header, so read it in. The
|
|
* footer starts at offset -1024 from the end: One sector for the
|
|
* footer, and another one for the end-of-stream marker.
|
|
*/
|
|
struct {
|
|
struct {
|
|
uint64_t val;
|
|
uint32_t size;
|
|
uint32_t type;
|
|
uint8_t pad[512 - 16];
|
|
} QEMU_PACKED footer_marker;
|
|
|
|
uint32_t magic;
|
|
VMDK4Header header;
|
|
uint8_t pad[512 - 4 - sizeof(VMDK4Header)];
|
|
|
|
struct {
|
|
uint64_t val;
|
|
uint32_t size;
|
|
uint32_t type;
|
|
uint8_t pad[512 - 16];
|
|
} QEMU_PACKED eos_marker;
|
|
} QEMU_PACKED footer;
|
|
|
|
ret = bdrv_pread(file, bs->file->bs->total_sectors * 512 - 1536,
|
|
sizeof(footer), &footer, 0);
|
|
if (ret < 0) {
|
|
error_setg_errno(errp, -ret, "Failed to read footer");
|
|
return ret;
|
|
}
|
|
|
|
/* Some sanity checks for the footer */
|
|
if (be32_to_cpu(footer.magic) != VMDK4_MAGIC ||
|
|
le32_to_cpu(footer.footer_marker.size) != 0 ||
|
|
le32_to_cpu(footer.footer_marker.type) != MARKER_FOOTER ||
|
|
le64_to_cpu(footer.eos_marker.val) != 0 ||
|
|
le32_to_cpu(footer.eos_marker.size) != 0 ||
|
|
le32_to_cpu(footer.eos_marker.type) != MARKER_END_OF_STREAM)
|
|
{
|
|
error_setg(errp, "Invalid footer");
|
|
return -EINVAL;
|
|
}
|
|
|
|
header = footer.header;
|
|
}
|
|
|
|
compressed =
|
|
le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE;
|
|
if (le32_to_cpu(header.version) > 3) {
|
|
error_setg(errp, "Unsupported VMDK version %" PRIu32,
|
|
le32_to_cpu(header.version));
|
|
return -ENOTSUP;
|
|
} else if (le32_to_cpu(header.version) == 3 && (flags & BDRV_O_RDWR) &&
|
|
!compressed) {
|
|
/* VMware KB 2064959 explains that version 3 added support for
|
|
* persistent changed block tracking (CBT), and backup software can
|
|
* read it as version=1 if it doesn't care about the changed area
|
|
* information. So we are safe to enable read only. */
|
|
error_setg(errp, "VMDK version 3 must be read only");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (le32_to_cpu(header.num_gtes_per_gt) > 512) {
|
|
error_setg(errp, "L2 table size too big");
|
|
return -EINVAL;
|
|
}
|
|
|
|
l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gt)
|
|
* le64_to_cpu(header.granularity);
|
|
if (l1_entry_sectors == 0) {
|
|
error_setg(errp, "L1 entry size is invalid");
|
|
return -EINVAL;
|
|
}
|
|
l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1)
|
|
/ l1_entry_sectors;
|
|
if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) {
|
|
l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9;
|
|
}
|
|
if (bdrv_nb_sectors(file->bs) < le64_to_cpu(header.grain_offset)) {
|
|
error_setg(errp, "File truncated, expecting at least %" PRId64 " bytes",
|
|
(int64_t)(le64_to_cpu(header.grain_offset)
|
|
* BDRV_SECTOR_SIZE));
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = vmdk_add_extent(bs, file, false,
|
|
le64_to_cpu(header.capacity),
|
|
le64_to_cpu(header.gd_offset) << 9,
|
|
l1_backup_offset,
|
|
l1_size,
|
|
le32_to_cpu(header.num_gtes_per_gt),
|
|
le64_to_cpu(header.granularity),
|
|
&extent,
|
|
errp);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
extent->compressed =
|
|
le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE;
|
|
if (extent->compressed) {
|
|
g_free(s->create_type);
|
|
s->create_type = g_strdup("streamOptimized");
|
|
}
|
|
extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER;
|
|
extent->version = le32_to_cpu(header.version);
|
|
extent->has_zero_grain = le32_to_cpu(header.flags) & VMDK4_FLAG_ZERO_GRAIN;
|
|
ret = vmdk_init_tables(bs, extent, errp);
|
|
if (ret) {
|
|
/* free extent allocated by vmdk_add_extent */
|
|
vmdk_free_last_extent(bs);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* find an option value out of descriptor file */
|
|
static int vmdk_parse_description(const char *desc, const char *opt_name,
|
|
char *buf, int buf_size)
|
|
{
|
|
char *opt_pos, *opt_end;
|
|
const char *end = desc + strlen(desc);
|
|
|
|
opt_pos = strstr(desc, opt_name);
|
|
if (!opt_pos) {
|
|
return VMDK_ERROR;
|
|
}
|
|
/* Skip "=\"" following opt_name */
|
|
opt_pos += strlen(opt_name) + 2;
|
|
if (opt_pos >= end) {
|
|
return VMDK_ERROR;
|
|
}
|
|
opt_end = opt_pos;
|
|
while (opt_end < end && *opt_end != '"') {
|
|
opt_end++;
|
|
}
|
|
if (opt_end == end || buf_size < opt_end - opt_pos + 1) {
|
|
return VMDK_ERROR;
|
|
}
|
|
pstrcpy(buf, opt_end - opt_pos + 1, opt_pos);
|
|
return VMDK_OK;
|
|
}
|
|
|
|
/* Open an extent file and append to bs array */
|
|
static int vmdk_open_sparse(BlockDriverState *bs, BdrvChild *file, int flags,
|
|
char *buf, QDict *options, Error **errp)
|
|
{
|
|
uint32_t magic;
|
|
|
|
magic = ldl_be_p(buf);
|
|
switch (magic) {
|
|
case VMDK3_MAGIC:
|
|
return vmdk_open_vmfs_sparse(bs, file, flags, errp);
|
|
case VMDK4_MAGIC:
|
|
return vmdk_open_vmdk4(bs, file, flags, options, errp);
|
|
default:
|
|
error_setg(errp, "Image not in VMDK format");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static const char *next_line(const char *s)
|
|
{
|
|
while (*s) {
|
|
if (*s == '\n') {
|
|
return s + 1;
|
|
}
|
|
s++;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
static int vmdk_parse_extents(const char *desc, BlockDriverState *bs,
|
|
QDict *options, Error **errp)
|
|
{
|
|
int ret;
|
|
int matches;
|
|
char access[11];
|
|
char type[11];
|
|
char fname[512];
|
|
const char *p, *np;
|
|
int64_t sectors = 0;
|
|
int64_t flat_offset;
|
|
char *desc_file_dir = NULL;
|
|
char *extent_path;
|
|
BdrvChild *extent_file;
|
|
BdrvChildRole extent_role;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
VmdkExtent *extent = NULL;
|
|
char extent_opt_prefix[32];
|
|
Error *local_err = NULL;
|
|
|
|
for (p = desc; *p; p = next_line(p)) {
|
|
/* parse extent line in one of below formats:
|
|
*
|
|
* RW [size in sectors] FLAT "file-name.vmdk" OFFSET
|
|
* RW [size in sectors] SPARSE "file-name.vmdk"
|
|
* RW [size in sectors] VMFS "file-name.vmdk"
|
|
* RW [size in sectors] VMFSSPARSE "file-name.vmdk"
|
|
* RW [size in sectors] SESPARSE "file-name.vmdk"
|
|
*/
|
|
flat_offset = -1;
|
|
matches = sscanf(p, "%10s %" SCNd64 " %10s \"%511[^\n\r\"]\" %" SCNd64,
|
|
access, §ors, type, fname, &flat_offset);
|
|
if (matches < 4 || strcmp(access, "RW")) {
|
|
continue;
|
|
} else if (!strcmp(type, "FLAT")) {
|
|
if (matches != 5 || flat_offset < 0) {
|
|
goto invalid;
|
|
}
|
|
} else if (!strcmp(type, "VMFS")) {
|
|
if (matches == 4) {
|
|
flat_offset = 0;
|
|
} else {
|
|
goto invalid;
|
|
}
|
|
} else if (matches != 4) {
|
|
goto invalid;
|
|
}
|
|
|
|
if (sectors <= 0 ||
|
|
(strcmp(type, "FLAT") && strcmp(type, "SPARSE") &&
|
|
strcmp(type, "VMFS") && strcmp(type, "VMFSSPARSE") &&
|
|
strcmp(type, "SESPARSE")) ||
|
|
(strcmp(access, "RW"))) {
|
|
continue;
|
|
}
|
|
|
|
if (path_is_absolute(fname)) {
|
|
extent_path = g_strdup(fname);
|
|
} else {
|
|
if (!desc_file_dir) {
|
|
desc_file_dir = bdrv_dirname(bs->file->bs, errp);
|
|
if (!desc_file_dir) {
|
|
bdrv_refresh_filename(bs->file->bs);
|
|
error_prepend(errp, "Cannot use relative paths with VMDK "
|
|
"descriptor file '%s': ",
|
|
bs->file->bs->filename);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
extent_path = g_strconcat(desc_file_dir, fname, NULL);
|
|
}
|
|
|
|
ret = snprintf(extent_opt_prefix, 32, "extents.%d", s->num_extents);
|
|
assert(ret < 32);
|
|
|
|
extent_role = BDRV_CHILD_DATA;
|
|
if (strcmp(type, "FLAT") != 0 && strcmp(type, "VMFS") != 0) {
|
|
/* non-flat extents have metadata */
|
|
extent_role |= BDRV_CHILD_METADATA;
|
|
}
|
|
|
|
extent_file = bdrv_open_child(extent_path, options, extent_opt_prefix,
|
|
bs, &child_of_bds, extent_role, false,
|
|
&local_err);
|
|
g_free(extent_path);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* save to extents array */
|
|
if (!strcmp(type, "FLAT") || !strcmp(type, "VMFS")) {
|
|
/* FLAT extent */
|
|
|
|
ret = vmdk_add_extent(bs, extent_file, true, sectors,
|
|
0, 0, 0, 0, 0, &extent, errp);
|
|
if (ret < 0) {
|
|
bdrv_unref_child(bs, extent_file);
|
|
goto out;
|
|
}
|
|
extent->flat_start_offset = flat_offset << 9;
|
|
} else if (!strcmp(type, "SPARSE") || !strcmp(type, "VMFSSPARSE")) {
|
|
/* SPARSE extent and VMFSSPARSE extent are both "COWD" sparse file*/
|
|
char *buf = vmdk_read_desc(extent_file, 0, errp);
|
|
if (!buf) {
|
|
ret = -EINVAL;
|
|
} else {
|
|
ret = vmdk_open_sparse(bs, extent_file, bs->open_flags, buf,
|
|
options, errp);
|
|
}
|
|
g_free(buf);
|
|
if (ret) {
|
|
bdrv_unref_child(bs, extent_file);
|
|
goto out;
|
|
}
|
|
extent = &s->extents[s->num_extents - 1];
|
|
} else if (!strcmp(type, "SESPARSE")) {
|
|
ret = vmdk_open_se_sparse(bs, extent_file, bs->open_flags, errp);
|
|
if (ret) {
|
|
bdrv_unref_child(bs, extent_file);
|
|
goto out;
|
|
}
|
|
extent = &s->extents[s->num_extents - 1];
|
|
} else {
|
|
error_setg(errp, "Unsupported extent type '%s'", type);
|
|
bdrv_unref_child(bs, extent_file);
|
|
ret = -ENOTSUP;
|
|
goto out;
|
|
}
|
|
extent->type = g_strdup(type);
|
|
}
|
|
|
|
ret = 0;
|
|
goto out;
|
|
|
|
invalid:
|
|
np = next_line(p);
|
|
assert(np != p);
|
|
if (np[-1] == '\n') {
|
|
np--;
|
|
}
|
|
error_setg(errp, "Invalid extent line: %.*s", (int)(np - p), p);
|
|
ret = -EINVAL;
|
|
|
|
out:
|
|
g_free(desc_file_dir);
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf,
|
|
QDict *options, Error **errp)
|
|
{
|
|
int ret;
|
|
char ct[128];
|
|
BDRVVmdkState *s = bs->opaque;
|
|
|
|
if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) {
|
|
error_setg(errp, "invalid VMDK image descriptor");
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
if (strcmp(ct, "monolithicFlat") &&
|
|
strcmp(ct, "vmfs") &&
|
|
strcmp(ct, "vmfsSparse") &&
|
|
strcmp(ct, "seSparse") &&
|
|
strcmp(ct, "twoGbMaxExtentSparse") &&
|
|
strcmp(ct, "twoGbMaxExtentFlat")) {
|
|
error_setg(errp, "Unsupported image type '%s'", ct);
|
|
ret = -ENOTSUP;
|
|
goto exit;
|
|
}
|
|
s->create_type = g_strdup(ct);
|
|
s->desc_offset = 0;
|
|
ret = vmdk_parse_extents(buf, bs, options, errp);
|
|
exit:
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_open(BlockDriverState *bs, QDict *options, int flags,
|
|
Error **errp)
|
|
{
|
|
char *buf;
|
|
int ret;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
uint32_t magic;
|
|
|
|
ret = bdrv_open_file_child(NULL, options, "file", bs, errp);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
buf = vmdk_read_desc(bs->file, 0, errp);
|
|
if (!buf) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
magic = ldl_be_p(buf);
|
|
switch (magic) {
|
|
case VMDK3_MAGIC:
|
|
case VMDK4_MAGIC:
|
|
ret = vmdk_open_sparse(bs, bs->file, flags, buf, options,
|
|
errp);
|
|
s->desc_offset = 0x200;
|
|
break;
|
|
default:
|
|
/* No data in the descriptor file */
|
|
bs->file->role &= ~BDRV_CHILD_DATA;
|
|
|
|
/* Must succeed because we have given up permissions if anything */
|
|
bdrv_child_refresh_perms(bs, bs->file, &error_abort);
|
|
|
|
ret = vmdk_open_desc_file(bs, flags, buf, options, errp);
|
|
break;
|
|
}
|
|
if (ret) {
|
|
goto fail;
|
|
}
|
|
|
|
/* try to open parent images, if exist */
|
|
ret = vmdk_parent_open(bs);
|
|
if (ret) {
|
|
goto fail;
|
|
}
|
|
ret = vmdk_read_cid(bs, 0, &s->cid);
|
|
if (ret) {
|
|
goto fail;
|
|
}
|
|
ret = vmdk_read_cid(bs, 1, &s->parent_cid);
|
|
if (ret) {
|
|
goto fail;
|
|
}
|
|
qemu_co_mutex_init(&s->lock);
|
|
|
|
/* Disable migration when VMDK images are used */
|
|
error_setg(&s->migration_blocker, "The vmdk format used by node '%s' "
|
|
"does not support live migration",
|
|
bdrv_get_device_or_node_name(bs));
|
|
ret = migrate_add_blocker(s->migration_blocker, errp);
|
|
if (ret < 0) {
|
|
error_free(s->migration_blocker);
|
|
goto fail;
|
|
}
|
|
|
|
g_free(buf);
|
|
return 0;
|
|
|
|
fail:
|
|
g_free(buf);
|
|
g_free(s->create_type);
|
|
s->create_type = NULL;
|
|
vmdk_free_extents(bs);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static void vmdk_refresh_limits(BlockDriverState *bs, Error **errp)
|
|
{
|
|
BDRVVmdkState *s = bs->opaque;
|
|
int i;
|
|
|
|
for (i = 0; i < s->num_extents; i++) {
|
|
if (!s->extents[i].flat) {
|
|
bs->bl.pwrite_zeroes_alignment =
|
|
MAX(bs->bl.pwrite_zeroes_alignment,
|
|
s->extents[i].cluster_sectors << BDRV_SECTOR_BITS);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* get_whole_cluster
|
|
*
|
|
* Copy backing file's cluster that covers @sector_num, otherwise write zero,
|
|
* to the cluster at @cluster_sector_num. If @zeroed is true, we're overwriting
|
|
* a zeroed cluster in the current layer and must not copy data from the
|
|
* backing file.
|
|
*
|
|
* If @skip_start_sector < @skip_end_sector, the relative range
|
|
* [@skip_start_sector, @skip_end_sector) is not copied or written, and leave
|
|
* it for call to write user data in the request.
|
|
*/
|
|
static int get_whole_cluster(BlockDriverState *bs,
|
|
VmdkExtent *extent,
|
|
uint64_t cluster_offset,
|
|
uint64_t offset,
|
|
uint64_t skip_start_bytes,
|
|
uint64_t skip_end_bytes,
|
|
bool zeroed)
|
|
{
|
|
int ret = VMDK_OK;
|
|
int64_t cluster_bytes;
|
|
uint8_t *whole_grain;
|
|
bool copy_from_backing;
|
|
|
|
/* For COW, align request sector_num to cluster start */
|
|
cluster_bytes = extent->cluster_sectors << BDRV_SECTOR_BITS;
|
|
offset = QEMU_ALIGN_DOWN(offset, cluster_bytes);
|
|
whole_grain = qemu_blockalign(bs, cluster_bytes);
|
|
copy_from_backing = bs->backing && !zeroed;
|
|
|
|
if (!copy_from_backing) {
|
|
memset(whole_grain, 0, skip_start_bytes);
|
|
memset(whole_grain + skip_end_bytes, 0, cluster_bytes - skip_end_bytes);
|
|
}
|
|
|
|
assert(skip_end_bytes <= cluster_bytes);
|
|
/* we will be here if it's first write on non-exist grain(cluster).
|
|
* try to read from parent image, if exist */
|
|
if (bs->backing && !vmdk_is_cid_valid(bs)) {
|
|
ret = VMDK_ERROR;
|
|
goto exit;
|
|
}
|
|
|
|
/* Read backing data before skip range */
|
|
if (skip_start_bytes > 0) {
|
|
if (copy_from_backing) {
|
|
/* qcow2 emits this on bs->file instead of bs->backing */
|
|
BLKDBG_EVENT(extent->file, BLKDBG_COW_READ);
|
|
ret = bdrv_pread(bs->backing, offset, skip_start_bytes,
|
|
whole_grain, 0);
|
|
if (ret < 0) {
|
|
ret = VMDK_ERROR;
|
|
goto exit;
|
|
}
|
|
}
|
|
BLKDBG_EVENT(extent->file, BLKDBG_COW_WRITE);
|
|
ret = bdrv_pwrite(extent->file, cluster_offset, skip_start_bytes,
|
|
whole_grain, 0);
|
|
if (ret < 0) {
|
|
ret = VMDK_ERROR;
|
|
goto exit;
|
|
}
|
|
}
|
|
/* Read backing data after skip range */
|
|
if (skip_end_bytes < cluster_bytes) {
|
|
if (copy_from_backing) {
|
|
/* qcow2 emits this on bs->file instead of bs->backing */
|
|
BLKDBG_EVENT(extent->file, BLKDBG_COW_READ);
|
|
ret = bdrv_pread(bs->backing, offset + skip_end_bytes,
|
|
cluster_bytes - skip_end_bytes,
|
|
whole_grain + skip_end_bytes, 0);
|
|
if (ret < 0) {
|
|
ret = VMDK_ERROR;
|
|
goto exit;
|
|
}
|
|
}
|
|
BLKDBG_EVENT(extent->file, BLKDBG_COW_WRITE);
|
|
ret = bdrv_pwrite(extent->file, cluster_offset + skip_end_bytes,
|
|
cluster_bytes - skip_end_bytes,
|
|
whole_grain + skip_end_bytes, 0);
|
|
if (ret < 0) {
|
|
ret = VMDK_ERROR;
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
ret = VMDK_OK;
|
|
exit:
|
|
qemu_vfree(whole_grain);
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data,
|
|
uint32_t offset)
|
|
{
|
|
offset = cpu_to_le32(offset);
|
|
/* update L2 table */
|
|
BLKDBG_EVENT(extent->file, BLKDBG_L2_UPDATE);
|
|
if (bdrv_pwrite(extent->file,
|
|
((int64_t)m_data->l2_offset * 512)
|
|
+ (m_data->l2_index * sizeof(offset)),
|
|
sizeof(offset), &offset, 0) < 0) {
|
|
return VMDK_ERROR;
|
|
}
|
|
/* update backup L2 table */
|
|
if (extent->l1_backup_table_offset != 0) {
|
|
m_data->l2_offset = extent->l1_backup_table[m_data->l1_index];
|
|
if (bdrv_pwrite(extent->file,
|
|
((int64_t)m_data->l2_offset * 512)
|
|
+ (m_data->l2_index * sizeof(offset)),
|
|
sizeof(offset), &offset, 0) < 0) {
|
|
return VMDK_ERROR;
|
|
}
|
|
}
|
|
if (bdrv_flush(extent->file->bs) < 0) {
|
|
return VMDK_ERROR;
|
|
}
|
|
if (m_data->l2_cache_entry) {
|
|
*m_data->l2_cache_entry = offset;
|
|
}
|
|
|
|
return VMDK_OK;
|
|
}
|
|
|
|
/**
|
|
* get_cluster_offset
|
|
*
|
|
* Look up cluster offset in extent file by sector number, and store in
|
|
* @cluster_offset.
|
|
*
|
|
* For flat extents, the start offset as parsed from the description file is
|
|
* returned.
|
|
*
|
|
* For sparse extents, look up in L1, L2 table. If allocate is true, return an
|
|
* offset for a new cluster and update L2 cache. If there is a backing file,
|
|
* COW is done before returning; otherwise, zeroes are written to the allocated
|
|
* cluster. Both COW and zero writing skips the sector range
|
|
* [@skip_start_sector, @skip_end_sector) passed in by caller, because caller
|
|
* has new data to write there.
|
|
*
|
|
* Returns: VMDK_OK if cluster exists and mapped in the image.
|
|
* VMDK_UNALLOC if cluster is not mapped and @allocate is false.
|
|
* VMDK_ERROR if failed.
|
|
*/
|
|
static int get_cluster_offset(BlockDriverState *bs,
|
|
VmdkExtent *extent,
|
|
VmdkMetaData *m_data,
|
|
uint64_t offset,
|
|
bool allocate,
|
|
uint64_t *cluster_offset,
|
|
uint64_t skip_start_bytes,
|
|
uint64_t skip_end_bytes)
|
|
{
|
|
unsigned int l1_index, l2_offset, l2_index;
|
|
int min_index, i, j;
|
|
uint32_t min_count;
|
|
void *l2_table;
|
|
bool zeroed = false;
|
|
int64_t ret;
|
|
int64_t cluster_sector;
|
|
unsigned int l2_size_bytes = extent->l2_size * extent->entry_size;
|
|
|
|
if (m_data) {
|
|
m_data->new_allocation = false;
|
|
}
|
|
if (extent->flat) {
|
|
*cluster_offset = extent->flat_start_offset;
|
|
return VMDK_OK;
|
|
}
|
|
|
|
offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE;
|
|
l1_index = (offset >> 9) / extent->l1_entry_sectors;
|
|
if (l1_index >= extent->l1_size) {
|
|
return VMDK_ERROR;
|
|
}
|
|
if (extent->sesparse) {
|
|
uint64_t l2_offset_u64;
|
|
|
|
assert(extent->entry_size == sizeof(uint64_t));
|
|
|
|
l2_offset_u64 = ((uint64_t *)extent->l1_table)[l1_index];
|
|
if (l2_offset_u64 == 0) {
|
|
l2_offset = 0;
|
|
} else if ((l2_offset_u64 & 0xffffffff00000000) != 0x1000000000000000) {
|
|
/*
|
|
* Top most nibble is 0x1 if grain table is allocated.
|
|
* strict check - top most 4 bytes must be 0x10000000 since max
|
|
* supported size is 64TB for disk - so no more than 64TB / 16MB
|
|
* grain directories which is smaller than uint32,
|
|
* where 16MB is the only supported default grain table coverage.
|
|
*/
|
|
return VMDK_ERROR;
|
|
} else {
|
|
l2_offset_u64 = l2_offset_u64 & 0x00000000ffffffff;
|
|
l2_offset_u64 = extent->sesparse_l2_tables_offset +
|
|
l2_offset_u64 * l2_size_bytes / SECTOR_SIZE;
|
|
if (l2_offset_u64 > 0x00000000ffffffff) {
|
|
return VMDK_ERROR;
|
|
}
|
|
l2_offset = (unsigned int)(l2_offset_u64);
|
|
}
|
|
} else {
|
|
assert(extent->entry_size == sizeof(uint32_t));
|
|
l2_offset = ((uint32_t *)extent->l1_table)[l1_index];
|
|
}
|
|
if (!l2_offset) {
|
|
return VMDK_UNALLOC;
|
|
}
|
|
for (i = 0; i < L2_CACHE_SIZE; i++) {
|
|
if (l2_offset == extent->l2_cache_offsets[i]) {
|
|
/* increment the hit count */
|
|
if (++extent->l2_cache_counts[i] == 0xffffffff) {
|
|
for (j = 0; j < L2_CACHE_SIZE; j++) {
|
|
extent->l2_cache_counts[j] >>= 1;
|
|
}
|
|
}
|
|
l2_table = (char *)extent->l2_cache + (i * l2_size_bytes);
|
|
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 (extent->l2_cache_counts[i] < min_count) {
|
|
min_count = extent->l2_cache_counts[i];
|
|
min_index = i;
|
|
}
|
|
}
|
|
l2_table = (char *)extent->l2_cache + (min_index * l2_size_bytes);
|
|
BLKDBG_EVENT(extent->file, BLKDBG_L2_LOAD);
|
|
if (bdrv_pread(extent->file,
|
|
(int64_t)l2_offset * 512,
|
|
l2_size_bytes,
|
|
l2_table,
|
|
0
|
|
) < 0) {
|
|
return VMDK_ERROR;
|
|
}
|
|
|
|
extent->l2_cache_offsets[min_index] = l2_offset;
|
|
extent->l2_cache_counts[min_index] = 1;
|
|
found:
|
|
l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size;
|
|
if (m_data) {
|
|
m_data->l1_index = l1_index;
|
|
m_data->l2_index = l2_index;
|
|
m_data->l2_offset = l2_offset;
|
|
m_data->l2_cache_entry = ((uint32_t *)l2_table) + l2_index;
|
|
}
|
|
|
|
if (extent->sesparse) {
|
|
cluster_sector = le64_to_cpu(((uint64_t *)l2_table)[l2_index]);
|
|
switch (cluster_sector & 0xf000000000000000) {
|
|
case 0x0000000000000000:
|
|
/* unallocated grain */
|
|
if (cluster_sector != 0) {
|
|
return VMDK_ERROR;
|
|
}
|
|
break;
|
|
case 0x1000000000000000:
|
|
/* scsi-unmapped grain - fallthrough */
|
|
case 0x2000000000000000:
|
|
/* zero grain */
|
|
zeroed = true;
|
|
break;
|
|
case 0x3000000000000000:
|
|
/* allocated grain */
|
|
cluster_sector = (((cluster_sector & 0x0fff000000000000) >> 48) |
|
|
((cluster_sector & 0x0000ffffffffffff) << 12));
|
|
cluster_sector = extent->sesparse_clusters_offset +
|
|
cluster_sector * extent->cluster_sectors;
|
|
break;
|
|
default:
|
|
return VMDK_ERROR;
|
|
}
|
|
} else {
|
|
cluster_sector = le32_to_cpu(((uint32_t *)l2_table)[l2_index]);
|
|
|
|
if (extent->has_zero_grain && cluster_sector == VMDK_GTE_ZEROED) {
|
|
zeroed = true;
|
|
}
|
|
}
|
|
|
|
if (!cluster_sector || zeroed) {
|
|
if (!allocate) {
|
|
return zeroed ? VMDK_ZEROED : VMDK_UNALLOC;
|
|
}
|
|
assert(!extent->sesparse);
|
|
|
|
if (extent->next_cluster_sector >= VMDK_EXTENT_MAX_SECTORS) {
|
|
return VMDK_ERROR;
|
|
}
|
|
|
|
cluster_sector = extent->next_cluster_sector;
|
|
extent->next_cluster_sector += extent->cluster_sectors;
|
|
|
|
/* 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.
|
|
*/
|
|
ret = get_whole_cluster(bs, extent, cluster_sector * BDRV_SECTOR_SIZE,
|
|
offset, skip_start_bytes, skip_end_bytes,
|
|
zeroed);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
if (m_data) {
|
|
m_data->new_allocation = true;
|
|
}
|
|
}
|
|
*cluster_offset = cluster_sector << BDRV_SECTOR_BITS;
|
|
return VMDK_OK;
|
|
}
|
|
|
|
static VmdkExtent *find_extent(BDRVVmdkState *s,
|
|
int64_t sector_num, VmdkExtent *start_hint)
|
|
{
|
|
VmdkExtent *extent = start_hint;
|
|
|
|
if (!extent) {
|
|
extent = &s->extents[0];
|
|
}
|
|
while (extent < &s->extents[s->num_extents]) {
|
|
if (sector_num < extent->end_sector) {
|
|
return extent;
|
|
}
|
|
extent++;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static inline uint64_t vmdk_find_offset_in_cluster(VmdkExtent *extent,
|
|
int64_t offset)
|
|
{
|
|
uint64_t extent_begin_offset, extent_relative_offset;
|
|
uint64_t cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE;
|
|
|
|
extent_begin_offset =
|
|
(extent->end_sector - extent->sectors) * BDRV_SECTOR_SIZE;
|
|
extent_relative_offset = offset - extent_begin_offset;
|
|
return extent_relative_offset % cluster_size;
|
|
}
|
|
|
|
static int coroutine_fn vmdk_co_block_status(BlockDriverState *bs,
|
|
bool want_zero,
|
|
int64_t offset, int64_t bytes,
|
|
int64_t *pnum, int64_t *map,
|
|
BlockDriverState **file)
|
|
{
|
|
BDRVVmdkState *s = bs->opaque;
|
|
int64_t index_in_cluster, n, ret;
|
|
uint64_t cluster_offset;
|
|
VmdkExtent *extent;
|
|
|
|
extent = find_extent(s, offset >> BDRV_SECTOR_BITS, NULL);
|
|
if (!extent) {
|
|
return -EIO;
|
|
}
|
|
qemu_co_mutex_lock(&s->lock);
|
|
ret = get_cluster_offset(bs, extent, NULL, offset, false, &cluster_offset,
|
|
0, 0);
|
|
qemu_co_mutex_unlock(&s->lock);
|
|
|
|
index_in_cluster = vmdk_find_offset_in_cluster(extent, offset);
|
|
switch (ret) {
|
|
case VMDK_ERROR:
|
|
ret = -EIO;
|
|
break;
|
|
case VMDK_UNALLOC:
|
|
ret = 0;
|
|
break;
|
|
case VMDK_ZEROED:
|
|
ret = BDRV_BLOCK_ZERO;
|
|
break;
|
|
case VMDK_OK:
|
|
ret = BDRV_BLOCK_DATA;
|
|
if (!extent->compressed) {
|
|
ret |= BDRV_BLOCK_OFFSET_VALID;
|
|
*map = cluster_offset + index_in_cluster;
|
|
if (extent->flat) {
|
|
ret |= BDRV_BLOCK_RECURSE;
|
|
}
|
|
}
|
|
*file = extent->file->bs;
|
|
break;
|
|
}
|
|
|
|
n = extent->cluster_sectors * BDRV_SECTOR_SIZE - index_in_cluster;
|
|
*pnum = MIN(n, bytes);
|
|
return ret;
|
|
}
|
|
|
|
static int coroutine_fn
|
|
vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset,
|
|
int64_t offset_in_cluster, QEMUIOVector *qiov,
|
|
uint64_t qiov_offset, uint64_t n_bytes,
|
|
uint64_t offset)
|
|
{
|
|
int ret;
|
|
VmdkGrainMarker *data = NULL;
|
|
uLongf buf_len;
|
|
QEMUIOVector local_qiov;
|
|
int64_t write_offset;
|
|
int64_t write_end_sector;
|
|
|
|
if (extent->compressed) {
|
|
void *compressed_data;
|
|
|
|
/* Only whole clusters */
|
|
if (offset_in_cluster ||
|
|
n_bytes > (extent->cluster_sectors * SECTOR_SIZE) ||
|
|
(n_bytes < (extent->cluster_sectors * SECTOR_SIZE) &&
|
|
offset + n_bytes != extent->end_sector * SECTOR_SIZE))
|
|
{
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (!extent->has_marker) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
buf_len = (extent->cluster_sectors << 9) * 2;
|
|
data = g_malloc(buf_len + sizeof(VmdkGrainMarker));
|
|
|
|
compressed_data = g_malloc(n_bytes);
|
|
qemu_iovec_to_buf(qiov, qiov_offset, compressed_data, n_bytes);
|
|
ret = compress(data->data, &buf_len, compressed_data, n_bytes);
|
|
g_free(compressed_data);
|
|
|
|
if (ret != Z_OK || buf_len == 0) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
data->lba = cpu_to_le64(offset >> BDRV_SECTOR_BITS);
|
|
data->size = cpu_to_le32(buf_len);
|
|
|
|
n_bytes = buf_len + sizeof(VmdkGrainMarker);
|
|
qemu_iovec_init_buf(&local_qiov, data, n_bytes);
|
|
|
|
BLKDBG_EVENT(extent->file, BLKDBG_WRITE_COMPRESSED);
|
|
} else {
|
|
qemu_iovec_init(&local_qiov, qiov->niov);
|
|
qemu_iovec_concat(&local_qiov, qiov, qiov_offset, n_bytes);
|
|
|
|
BLKDBG_EVENT(extent->file, BLKDBG_WRITE_AIO);
|
|
}
|
|
|
|
write_offset = cluster_offset + offset_in_cluster;
|
|
ret = bdrv_co_pwritev(extent->file, write_offset, n_bytes,
|
|
&local_qiov, 0);
|
|
|
|
write_end_sector = DIV_ROUND_UP(write_offset + n_bytes, BDRV_SECTOR_SIZE);
|
|
|
|
if (extent->compressed) {
|
|
extent->next_cluster_sector = write_end_sector;
|
|
} else {
|
|
extent->next_cluster_sector = MAX(extent->next_cluster_sector,
|
|
write_end_sector);
|
|
}
|
|
|
|
if (ret < 0) {
|
|
goto out;
|
|
}
|
|
ret = 0;
|
|
out:
|
|
g_free(data);
|
|
if (!extent->compressed) {
|
|
qemu_iovec_destroy(&local_qiov);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int coroutine_fn
|
|
vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset,
|
|
int64_t offset_in_cluster, QEMUIOVector *qiov,
|
|
int bytes)
|
|
{
|
|
int ret;
|
|
int cluster_bytes, buf_bytes;
|
|
uint8_t *cluster_buf, *compressed_data;
|
|
uint8_t *uncomp_buf;
|
|
uint32_t data_len;
|
|
VmdkGrainMarker *marker;
|
|
uLongf buf_len;
|
|
|
|
|
|
if (!extent->compressed) {
|
|
BLKDBG_EVENT(extent->file, BLKDBG_READ_AIO);
|
|
ret = bdrv_co_preadv(extent->file,
|
|
cluster_offset + offset_in_cluster, bytes,
|
|
qiov, 0);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
cluster_bytes = extent->cluster_sectors * 512;
|
|
/* Read two clusters in case GrainMarker + compressed data > one cluster */
|
|
buf_bytes = cluster_bytes * 2;
|
|
cluster_buf = g_malloc(buf_bytes);
|
|
uncomp_buf = g_malloc(cluster_bytes);
|
|
BLKDBG_EVENT(extent->file, BLKDBG_READ_COMPRESSED);
|
|
ret = bdrv_pread(extent->file, cluster_offset, buf_bytes, cluster_buf, 0);
|
|
if (ret < 0) {
|
|
goto out;
|
|
}
|
|
compressed_data = cluster_buf;
|
|
buf_len = cluster_bytes;
|
|
data_len = cluster_bytes;
|
|
if (extent->has_marker) {
|
|
marker = (VmdkGrainMarker *)cluster_buf;
|
|
compressed_data = marker->data;
|
|
data_len = le32_to_cpu(marker->size);
|
|
}
|
|
if (!data_len || data_len > buf_bytes) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
ret = uncompress(uncomp_buf, &buf_len, compressed_data, data_len);
|
|
if (ret != Z_OK) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
|
|
}
|
|
if (offset_in_cluster < 0 ||
|
|
offset_in_cluster + bytes > buf_len) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
qemu_iovec_from_buf(qiov, 0, uncomp_buf + offset_in_cluster, bytes);
|
|
ret = 0;
|
|
|
|
out:
|
|
g_free(uncomp_buf);
|
|
g_free(cluster_buf);
|
|
return ret;
|
|
}
|
|
|
|
static int coroutine_fn
|
|
vmdk_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
|
|
QEMUIOVector *qiov, BdrvRequestFlags flags)
|
|
{
|
|
BDRVVmdkState *s = bs->opaque;
|
|
int ret;
|
|
uint64_t n_bytes, offset_in_cluster;
|
|
VmdkExtent *extent = NULL;
|
|
QEMUIOVector local_qiov;
|
|
uint64_t cluster_offset;
|
|
uint64_t bytes_done = 0;
|
|
|
|
qemu_iovec_init(&local_qiov, qiov->niov);
|
|
qemu_co_mutex_lock(&s->lock);
|
|
|
|
while (bytes > 0) {
|
|
extent = find_extent(s, offset >> BDRV_SECTOR_BITS, extent);
|
|
if (!extent) {
|
|
ret = -EIO;
|
|
goto fail;
|
|
}
|
|
ret = get_cluster_offset(bs, extent, NULL,
|
|
offset, false, &cluster_offset, 0, 0);
|
|
offset_in_cluster = vmdk_find_offset_in_cluster(extent, offset);
|
|
|
|
n_bytes = MIN(bytes, extent->cluster_sectors * BDRV_SECTOR_SIZE
|
|
- offset_in_cluster);
|
|
|
|
if (ret != VMDK_OK) {
|
|
/* if not allocated, try to read from parent image, if exist */
|
|
if (bs->backing && ret != VMDK_ZEROED) {
|
|
if (!vmdk_is_cid_valid(bs)) {
|
|
ret = -EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
qemu_iovec_reset(&local_qiov);
|
|
qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes);
|
|
|
|
/* qcow2 emits this on bs->file instead of bs->backing */
|
|
BLKDBG_EVENT(bs->file, BLKDBG_READ_BACKING_AIO);
|
|
ret = bdrv_co_preadv(bs->backing, offset, n_bytes,
|
|
&local_qiov, 0);
|
|
if (ret < 0) {
|
|
goto fail;
|
|
}
|
|
} else {
|
|
qemu_iovec_memset(qiov, bytes_done, 0, n_bytes);
|
|
}
|
|
} else {
|
|
qemu_iovec_reset(&local_qiov);
|
|
qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes);
|
|
|
|
ret = vmdk_read_extent(extent, cluster_offset, offset_in_cluster,
|
|
&local_qiov, n_bytes);
|
|
if (ret) {
|
|
goto fail;
|
|
}
|
|
}
|
|
bytes -= n_bytes;
|
|
offset += n_bytes;
|
|
bytes_done += n_bytes;
|
|
}
|
|
|
|
ret = 0;
|
|
fail:
|
|
qemu_co_mutex_unlock(&s->lock);
|
|
qemu_iovec_destroy(&local_qiov);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* vmdk_write:
|
|
* @zeroed: buf is ignored (data is zero), use zeroed_grain GTE feature
|
|
* if possible, otherwise return -ENOTSUP.
|
|
* @zero_dry_run: used for zeroed == true only, don't update L2 table, just try
|
|
* with each cluster. By dry run we can find if the zero write
|
|
* is possible without modifying image data.
|
|
*
|
|
* Returns: error code with 0 for success.
|
|
*/
|
|
static int coroutine_fn vmdk_pwritev(BlockDriverState *bs, uint64_t offset,
|
|
uint64_t bytes, QEMUIOVector *qiov,
|
|
bool zeroed, bool zero_dry_run)
|
|
{
|
|
BDRVVmdkState *s = bs->opaque;
|
|
VmdkExtent *extent = NULL;
|
|
int ret;
|
|
int64_t offset_in_cluster, n_bytes;
|
|
uint64_t cluster_offset;
|
|
uint64_t bytes_done = 0;
|
|
VmdkMetaData m_data;
|
|
|
|
if (DIV_ROUND_UP(offset, BDRV_SECTOR_SIZE) > bs->total_sectors) {
|
|
error_report("Wrong offset: offset=0x%" PRIx64
|
|
" total_sectors=0x%" PRIx64,
|
|
offset, bs->total_sectors);
|
|
return -EIO;
|
|
}
|
|
|
|
while (bytes > 0) {
|
|
extent = find_extent(s, offset >> BDRV_SECTOR_BITS, extent);
|
|
if (!extent) {
|
|
return -EIO;
|
|
}
|
|
if (extent->sesparse) {
|
|
return -ENOTSUP;
|
|
}
|
|
offset_in_cluster = vmdk_find_offset_in_cluster(extent, offset);
|
|
n_bytes = MIN(bytes, extent->cluster_sectors * BDRV_SECTOR_SIZE
|
|
- offset_in_cluster);
|
|
|
|
ret = get_cluster_offset(bs, extent, &m_data, offset,
|
|
!(extent->compressed || zeroed),
|
|
&cluster_offset, offset_in_cluster,
|
|
offset_in_cluster + n_bytes);
|
|
if (extent->compressed) {
|
|
if (ret == VMDK_OK) {
|
|
/* Refuse write to allocated cluster for streamOptimized */
|
|
error_report("Could not write to allocated cluster"
|
|
" for streamOptimized");
|
|
return -EIO;
|
|
} else if (!zeroed) {
|
|
/* allocate */
|
|
ret = get_cluster_offset(bs, extent, &m_data, offset,
|
|
true, &cluster_offset, 0, 0);
|
|
}
|
|
}
|
|
if (ret == VMDK_ERROR) {
|
|
return -EINVAL;
|
|
}
|
|
if (zeroed) {
|
|
/* Do zeroed write, buf is ignored */
|
|
if (extent->has_zero_grain &&
|
|
offset_in_cluster == 0 &&
|
|
n_bytes >= extent->cluster_sectors * BDRV_SECTOR_SIZE) {
|
|
n_bytes = extent->cluster_sectors * BDRV_SECTOR_SIZE;
|
|
if (!zero_dry_run && ret != VMDK_ZEROED) {
|
|
/* update L2 tables */
|
|
if (vmdk_L2update(extent, &m_data, VMDK_GTE_ZEROED)
|
|
!= VMDK_OK) {
|
|
return -EIO;
|
|
}
|
|
}
|
|
} else {
|
|
return -ENOTSUP;
|
|
}
|
|
} else {
|
|
ret = vmdk_write_extent(extent, cluster_offset, offset_in_cluster,
|
|
qiov, bytes_done, n_bytes, offset);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
if (m_data.new_allocation) {
|
|
/* update L2 tables */
|
|
if (vmdk_L2update(extent, &m_data,
|
|
cluster_offset >> BDRV_SECTOR_BITS)
|
|
!= VMDK_OK) {
|
|
return -EIO;
|
|
}
|
|
}
|
|
}
|
|
bytes -= n_bytes;
|
|
offset += n_bytes;
|
|
bytes_done += n_bytes;
|
|
|
|
/* update CID on the first write every time the virtual disk is
|
|
* opened */
|
|
if (!s->cid_updated) {
|
|
ret = vmdk_write_cid(bs, g_random_int());
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
s->cid_updated = true;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int coroutine_fn
|
|
vmdk_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
|
|
QEMUIOVector *qiov, BdrvRequestFlags flags)
|
|
{
|
|
int ret;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
qemu_co_mutex_lock(&s->lock);
|
|
ret = vmdk_pwritev(bs, offset, bytes, qiov, false, false);
|
|
qemu_co_mutex_unlock(&s->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int coroutine_fn
|
|
vmdk_co_pwritev_compressed(BlockDriverState *bs, int64_t offset, int64_t bytes,
|
|
QEMUIOVector *qiov)
|
|
{
|
|
if (bytes == 0) {
|
|
/* The caller will write bytes 0 to signal EOF.
|
|
* When receive it, we align EOF to a sector boundary. */
|
|
BDRVVmdkState *s = bs->opaque;
|
|
int i, ret;
|
|
int64_t length;
|
|
|
|
for (i = 0; i < s->num_extents; i++) {
|
|
length = bdrv_getlength(s->extents[i].file->bs);
|
|
if (length < 0) {
|
|
return length;
|
|
}
|
|
length = QEMU_ALIGN_UP(length, BDRV_SECTOR_SIZE);
|
|
ret = bdrv_truncate(s->extents[i].file, length, false,
|
|
PREALLOC_MODE_OFF, 0, NULL);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
return vmdk_co_pwritev(bs, offset, bytes, qiov, 0);
|
|
}
|
|
|
|
static int coroutine_fn vmdk_co_pwrite_zeroes(BlockDriverState *bs,
|
|
int64_t offset,
|
|
int64_t bytes,
|
|
BdrvRequestFlags flags)
|
|
{
|
|
int ret;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
|
|
qemu_co_mutex_lock(&s->lock);
|
|
/* write zeroes could fail if sectors not aligned to cluster, test it with
|
|
* dry_run == true before really updating image */
|
|
ret = vmdk_pwritev(bs, offset, bytes, NULL, true, true);
|
|
if (!ret) {
|
|
ret = vmdk_pwritev(bs, offset, bytes, NULL, true, false);
|
|
}
|
|
qemu_co_mutex_unlock(&s->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_init_extent(BlockBackend *blk,
|
|
int64_t filesize, bool flat,
|
|
bool compress, bool zeroed_grain,
|
|
Error **errp)
|
|
{
|
|
int ret, i;
|
|
VMDK4Header header;
|
|
uint32_t tmp, magic, grains, gd_sectors, gt_size, gt_count;
|
|
uint32_t *gd_buf = NULL;
|
|
int gd_buf_size;
|
|
|
|
if (flat) {
|
|
ret = blk_truncate(blk, filesize, false, PREALLOC_MODE_OFF, 0, errp);
|
|
goto exit;
|
|
}
|
|
magic = cpu_to_be32(VMDK4_MAGIC);
|
|
memset(&header, 0, sizeof(header));
|
|
if (compress) {
|
|
header.version = 3;
|
|
} else if (zeroed_grain) {
|
|
header.version = 2;
|
|
} else {
|
|
header.version = 1;
|
|
}
|
|
header.flags = VMDK4_FLAG_RGD | VMDK4_FLAG_NL_DETECT
|
|
| (compress ? VMDK4_FLAG_COMPRESS | VMDK4_FLAG_MARKER : 0)
|
|
| (zeroed_grain ? VMDK4_FLAG_ZERO_GRAIN : 0);
|
|
header.compressAlgorithm = compress ? VMDK4_COMPRESSION_DEFLATE : 0;
|
|
header.capacity = filesize / BDRV_SECTOR_SIZE;
|
|
header.granularity = 128;
|
|
header.num_gtes_per_gt = BDRV_SECTOR_SIZE;
|
|
|
|
grains = DIV_ROUND_UP(filesize / BDRV_SECTOR_SIZE, header.granularity);
|
|
gt_size = DIV_ROUND_UP(header.num_gtes_per_gt * sizeof(uint32_t),
|
|
BDRV_SECTOR_SIZE);
|
|
gt_count = DIV_ROUND_UP(grains, header.num_gtes_per_gt);
|
|
gd_sectors = DIV_ROUND_UP(gt_count * sizeof(uint32_t), BDRV_SECTOR_SIZE);
|
|
|
|
header.desc_offset = 1;
|
|
header.desc_size = 20;
|
|
header.rgd_offset = header.desc_offset + header.desc_size;
|
|
header.gd_offset = header.rgd_offset + gd_sectors + (gt_size * gt_count);
|
|
header.grain_offset =
|
|
ROUND_UP(header.gd_offset + gd_sectors + (gt_size * gt_count),
|
|
header.granularity);
|
|
/* swap endianness for all header fields */
|
|
header.version = cpu_to_le32(header.version);
|
|
header.flags = cpu_to_le32(header.flags);
|
|
header.capacity = cpu_to_le64(header.capacity);
|
|
header.granularity = cpu_to_le64(header.granularity);
|
|
header.num_gtes_per_gt = cpu_to_le32(header.num_gtes_per_gt);
|
|
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.compressAlgorithm = cpu_to_le16(header.compressAlgorithm);
|
|
|
|
header.check_bytes[0] = 0xa;
|
|
header.check_bytes[1] = 0x20;
|
|
header.check_bytes[2] = 0xd;
|
|
header.check_bytes[3] = 0xa;
|
|
|
|
/* write all the data */
|
|
ret = blk_pwrite(blk, 0, sizeof(magic), &magic, 0);
|
|
if (ret < 0) {
|
|
error_setg(errp, QERR_IO_ERROR);
|
|
goto exit;
|
|
}
|
|
ret = blk_pwrite(blk, sizeof(magic), sizeof(header), &header, 0);
|
|
if (ret < 0) {
|
|
error_setg(errp, QERR_IO_ERROR);
|
|
goto exit;
|
|
}
|
|
|
|
ret = blk_truncate(blk, le64_to_cpu(header.grain_offset) << 9, false,
|
|
PREALLOC_MODE_OFF, 0, errp);
|
|
if (ret < 0) {
|
|
goto exit;
|
|
}
|
|
|
|
/* write grain directory */
|
|
gd_buf_size = gd_sectors * BDRV_SECTOR_SIZE;
|
|
gd_buf = g_malloc0(gd_buf_size);
|
|
for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_sectors;
|
|
i < gt_count; i++, tmp += gt_size) {
|
|
gd_buf[i] = cpu_to_le32(tmp);
|
|
}
|
|
ret = blk_pwrite(blk, le64_to_cpu(header.rgd_offset) * BDRV_SECTOR_SIZE,
|
|
gd_buf_size, gd_buf, 0);
|
|
if (ret < 0) {
|
|
error_setg(errp, QERR_IO_ERROR);
|
|
goto exit;
|
|
}
|
|
|
|
/* write backup grain directory */
|
|
for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_sectors;
|
|
i < gt_count; i++, tmp += gt_size) {
|
|
gd_buf[i] = cpu_to_le32(tmp);
|
|
}
|
|
ret = blk_pwrite(blk, le64_to_cpu(header.gd_offset) * BDRV_SECTOR_SIZE,
|
|
gd_buf_size, gd_buf, 0);
|
|
if (ret < 0) {
|
|
error_setg(errp, QERR_IO_ERROR);
|
|
}
|
|
|
|
ret = 0;
|
|
exit:
|
|
g_free(gd_buf);
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_create_extent(const char *filename, int64_t filesize,
|
|
bool flat, bool compress, bool zeroed_grain,
|
|
BlockBackend **pbb,
|
|
QemuOpts *opts, Error **errp)
|
|
{
|
|
int ret;
|
|
BlockBackend *blk = NULL;
|
|
|
|
ret = bdrv_create_file(filename, opts, errp);
|
|
if (ret < 0) {
|
|
goto exit;
|
|
}
|
|
|
|
blk = blk_new_open(filename, NULL, NULL,
|
|
BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL,
|
|
errp);
|
|
if (blk == NULL) {
|
|
ret = -EIO;
|
|
goto exit;
|
|
}
|
|
|
|
blk_set_allow_write_beyond_eof(blk, true);
|
|
|
|
ret = vmdk_init_extent(blk, filesize, flat, compress, zeroed_grain, errp);
|
|
exit:
|
|
if (blk) {
|
|
if (pbb) {
|
|
*pbb = blk;
|
|
} else {
|
|
blk_unref(blk);
|
|
blk = NULL;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int filename_decompose(const char *filename, char *path, char *prefix,
|
|
char *postfix, size_t buf_len, Error **errp)
|
|
{
|
|
const char *p, *q;
|
|
|
|
if (filename == NULL || !strlen(filename)) {
|
|
error_setg(errp, "No filename provided");
|
|
return VMDK_ERROR;
|
|
}
|
|
p = strrchr(filename, '/');
|
|
if (p == NULL) {
|
|
p = strrchr(filename, '\\');
|
|
}
|
|
if (p == NULL) {
|
|
p = strrchr(filename, ':');
|
|
}
|
|
if (p != NULL) {
|
|
p++;
|
|
if (p - filename >= buf_len) {
|
|
return VMDK_ERROR;
|
|
}
|
|
pstrcpy(path, p - filename + 1, filename);
|
|
} else {
|
|
p = filename;
|
|
path[0] = '\0';
|
|
}
|
|
q = strrchr(p, '.');
|
|
if (q == NULL) {
|
|
pstrcpy(prefix, buf_len, p);
|
|
postfix[0] = '\0';
|
|
} else {
|
|
if (q - p >= buf_len) {
|
|
return VMDK_ERROR;
|
|
}
|
|
pstrcpy(prefix, q - p + 1, p);
|
|
pstrcpy(postfix, buf_len, q);
|
|
}
|
|
return VMDK_OK;
|
|
}
|
|
|
|
/*
|
|
* idx == 0: get or create the descriptor file (also the image file if in a
|
|
* non-split format.
|
|
* idx >= 1: get the n-th extent if in a split subformat
|
|
*/
|
|
typedef BlockBackend *(*vmdk_create_extent_fn)(int64_t size,
|
|
int idx,
|
|
bool flat,
|
|
bool split,
|
|
bool compress,
|
|
bool zeroed_grain,
|
|
void *opaque,
|
|
Error **errp);
|
|
|
|
static void vmdk_desc_add_extent(GString *desc,
|
|
const char *extent_line_fmt,
|
|
int64_t size, const char *filename)
|
|
{
|
|
char *basename = g_path_get_basename(filename);
|
|
|
|
g_string_append_printf(desc, extent_line_fmt,
|
|
DIV_ROUND_UP(size, BDRV_SECTOR_SIZE), basename);
|
|
g_free(basename);
|
|
}
|
|
|
|
static int coroutine_fn vmdk_co_do_create(int64_t size,
|
|
BlockdevVmdkSubformat subformat,
|
|
BlockdevVmdkAdapterType adapter_type,
|
|
const char *backing_file,
|
|
const char *hw_version,
|
|
const char *toolsversion,
|
|
bool compat6,
|
|
bool zeroed_grain,
|
|
vmdk_create_extent_fn extent_fn,
|
|
void *opaque,
|
|
Error **errp)
|
|
{
|
|
int extent_idx;
|
|
BlockBackend *blk = NULL;
|
|
BlockBackend *extent_blk;
|
|
Error *local_err = NULL;
|
|
char *desc = NULL;
|
|
int ret = 0;
|
|
bool flat, split, compress;
|
|
GString *ext_desc_lines;
|
|
const int64_t split_size = 0x80000000; /* VMDK has constant split size */
|
|
int64_t extent_size;
|
|
int64_t created_size = 0;
|
|
const char *extent_line_fmt;
|
|
char *parent_desc_line = g_malloc0(BUF_SIZE);
|
|
uint32_t parent_cid = 0xffffffff;
|
|
uint32_t number_heads = 16;
|
|
uint32_t desc_offset = 0, desc_len;
|
|
const char desc_template[] =
|
|
"# Disk DescriptorFile\n"
|
|
"version=1\n"
|
|
"CID=%" PRIx32 "\n"
|
|
"parentCID=%" PRIx32 "\n"
|
|
"createType=\"%s\"\n"
|
|
"%s"
|
|
"\n"
|
|
"# Extent description\n"
|
|
"%s"
|
|
"\n"
|
|
"# The Disk Data Base\n"
|
|
"#DDB\n"
|
|
"\n"
|
|
"ddb.virtualHWVersion = \"%s\"\n"
|
|
"ddb.geometry.cylinders = \"%" PRId64 "\"\n"
|
|
"ddb.geometry.heads = \"%" PRIu32 "\"\n"
|
|
"ddb.geometry.sectors = \"63\"\n"
|
|
"ddb.adapterType = \"%s\"\n"
|
|
"ddb.toolsVersion = \"%s\"\n";
|
|
|
|
ext_desc_lines = g_string_new(NULL);
|
|
|
|
/* Read out options */
|
|
if (compat6) {
|
|
if (hw_version) {
|
|
error_setg(errp,
|
|
"compat6 cannot be enabled with hwversion set");
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
hw_version = "6";
|
|
}
|
|
if (!hw_version) {
|
|
hw_version = "4";
|
|
}
|
|
if (!toolsversion) {
|
|
toolsversion = "2147483647";
|
|
}
|
|
|
|
if (adapter_type != BLOCKDEV_VMDK_ADAPTER_TYPE_IDE) {
|
|
/* that's the number of heads with which vmware operates when
|
|
creating, exporting, etc. vmdk files with a non-ide adapter type */
|
|
number_heads = 255;
|
|
}
|
|
split = (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTFLAT) ||
|
|
(subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTSPARSE);
|
|
flat = (subformat == BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICFLAT) ||
|
|
(subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTFLAT);
|
|
compress = subformat == BLOCKDEV_VMDK_SUBFORMAT_STREAMOPTIMIZED;
|
|
|
|
if (flat) {
|
|
extent_line_fmt = "RW %" PRId64 " FLAT \"%s\" 0\n";
|
|
} else {
|
|
extent_line_fmt = "RW %" PRId64 " SPARSE \"%s\"\n";
|
|
}
|
|
if (flat && backing_file) {
|
|
error_setg(errp, "Flat image can't have backing file");
|
|
ret = -ENOTSUP;
|
|
goto exit;
|
|
}
|
|
if (flat && zeroed_grain) {
|
|
error_setg(errp, "Flat image can't enable zeroed grain");
|
|
ret = -ENOTSUP;
|
|
goto exit;
|
|
}
|
|
|
|
/* Create extents */
|
|
if (split) {
|
|
extent_size = split_size;
|
|
} else {
|
|
extent_size = size;
|
|
}
|
|
if (!split && !flat) {
|
|
created_size = extent_size;
|
|
} else {
|
|
created_size = 0;
|
|
}
|
|
/* Get the descriptor file BDS */
|
|
blk = extent_fn(created_size, 0, flat, split, compress, zeroed_grain,
|
|
opaque, errp);
|
|
if (!blk) {
|
|
ret = -EIO;
|
|
goto exit;
|
|
}
|
|
if (!split && !flat) {
|
|
vmdk_desc_add_extent(ext_desc_lines, extent_line_fmt, created_size,
|
|
blk_bs(blk)->filename);
|
|
}
|
|
|
|
if (backing_file) {
|
|
BlockBackend *backing;
|
|
char *full_backing =
|
|
bdrv_get_full_backing_filename_from_filename(blk_bs(blk)->filename,
|
|
backing_file,
|
|
&local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
ret = -ENOENT;
|
|
goto exit;
|
|
}
|
|
assert(full_backing);
|
|
|
|
backing = blk_new_open(full_backing, NULL, NULL,
|
|
BDRV_O_NO_BACKING, errp);
|
|
g_free(full_backing);
|
|
if (backing == NULL) {
|
|
ret = -EIO;
|
|
goto exit;
|
|
}
|
|
if (strcmp(blk_bs(backing)->drv->format_name, "vmdk")) {
|
|
error_setg(errp, "Invalid backing file format: %s. Must be vmdk",
|
|
blk_bs(backing)->drv->format_name);
|
|
blk_unref(backing);
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
ret = vmdk_read_cid(blk_bs(backing), 0, &parent_cid);
|
|
blk_unref(backing);
|
|
if (ret) {
|
|
error_setg(errp, "Failed to read parent CID");
|
|
goto exit;
|
|
}
|
|
snprintf(parent_desc_line, BUF_SIZE,
|
|
"parentFileNameHint=\"%s\"", backing_file);
|
|
}
|
|
extent_idx = 1;
|
|
while (created_size < size) {
|
|
int64_t cur_size = MIN(size - created_size, extent_size);
|
|
extent_blk = extent_fn(cur_size, extent_idx, flat, split, compress,
|
|
zeroed_grain, opaque, errp);
|
|
if (!extent_blk) {
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
vmdk_desc_add_extent(ext_desc_lines, extent_line_fmt, cur_size,
|
|
blk_bs(extent_blk)->filename);
|
|
created_size += cur_size;
|
|
extent_idx++;
|
|
blk_unref(extent_blk);
|
|
}
|
|
|
|
/* Check whether we got excess extents */
|
|
extent_blk = extent_fn(-1, extent_idx, flat, split, compress, zeroed_grain,
|
|
opaque, NULL);
|
|
if (extent_blk) {
|
|
blk_unref(extent_blk);
|
|
error_setg(errp, "List of extents contains unused extents");
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
|
|
/* generate descriptor file */
|
|
desc = g_strdup_printf(desc_template,
|
|
g_random_int(),
|
|
parent_cid,
|
|
BlockdevVmdkSubformat_str(subformat),
|
|
parent_desc_line,
|
|
ext_desc_lines->str,
|
|
hw_version,
|
|
size /
|
|
(int64_t)(63 * number_heads * BDRV_SECTOR_SIZE),
|
|
number_heads,
|
|
BlockdevVmdkAdapterType_str(adapter_type),
|
|
toolsversion);
|
|
desc_len = strlen(desc);
|
|
/* the descriptor offset = 0x200 */
|
|
if (!split && !flat) {
|
|
desc_offset = 0x200;
|
|
}
|
|
|
|
ret = blk_pwrite(blk, desc_offset, desc_len, desc, 0);
|
|
if (ret < 0) {
|
|
error_setg_errno(errp, -ret, "Could not write description");
|
|
goto exit;
|
|
}
|
|
/* bdrv_pwrite write padding zeros to align to sector, we don't need that
|
|
* for description file */
|
|
if (desc_offset == 0) {
|
|
ret = blk_truncate(blk, desc_len, false, PREALLOC_MODE_OFF, 0, errp);
|
|
if (ret < 0) {
|
|
goto exit;
|
|
}
|
|
}
|
|
ret = 0;
|
|
exit:
|
|
if (blk) {
|
|
blk_unref(blk);
|
|
}
|
|
g_free(desc);
|
|
g_free(parent_desc_line);
|
|
g_string_free(ext_desc_lines, true);
|
|
return ret;
|
|
}
|
|
|
|
typedef struct {
|
|
char *path;
|
|
char *prefix;
|
|
char *postfix;
|
|
QemuOpts *opts;
|
|
} VMDKCreateOptsData;
|
|
|
|
static BlockBackend *vmdk_co_create_opts_cb(int64_t size, int idx,
|
|
bool flat, bool split, bool compress,
|
|
bool zeroed_grain, void *opaque,
|
|
Error **errp)
|
|
{
|
|
BlockBackend *blk = NULL;
|
|
BlockDriverState *bs = NULL;
|
|
VMDKCreateOptsData *data = opaque;
|
|
char *ext_filename = NULL;
|
|
char *rel_filename = NULL;
|
|
|
|
/* We're done, don't create excess extents. */
|
|
if (size == -1) {
|
|
assert(errp == NULL);
|
|
return NULL;
|
|
}
|
|
|
|
if (idx == 0) {
|
|
rel_filename = g_strdup_printf("%s%s", data->prefix, data->postfix);
|
|
} else if (split) {
|
|
rel_filename = g_strdup_printf("%s-%c%03d%s",
|
|
data->prefix,
|
|
flat ? 'f' : 's', idx, data->postfix);
|
|
} else {
|
|
assert(idx == 1);
|
|
rel_filename = g_strdup_printf("%s-flat%s", data->prefix, data->postfix);
|
|
}
|
|
|
|
ext_filename = g_strdup_printf("%s%s", data->path, rel_filename);
|
|
g_free(rel_filename);
|
|
|
|
if (vmdk_create_extent(ext_filename, size,
|
|
flat, compress, zeroed_grain, &blk, data->opts,
|
|
errp)) {
|
|
goto exit;
|
|
}
|
|
bdrv_unref(bs);
|
|
exit:
|
|
g_free(ext_filename);
|
|
return blk;
|
|
}
|
|
|
|
static int coroutine_fn vmdk_co_create_opts(BlockDriver *drv,
|
|
const char *filename,
|
|
QemuOpts *opts,
|
|
Error **errp)
|
|
{
|
|
Error *local_err = NULL;
|
|
char *desc = NULL;
|
|
int64_t total_size = 0;
|
|
char *adapter_type = NULL;
|
|
BlockdevVmdkAdapterType adapter_type_enum;
|
|
char *backing_file = NULL;
|
|
char *hw_version = NULL;
|
|
char *toolsversion = NULL;
|
|
char *fmt = NULL;
|
|
BlockdevVmdkSubformat subformat;
|
|
int ret = 0;
|
|
char *path = g_malloc0(PATH_MAX);
|
|
char *prefix = g_malloc0(PATH_MAX);
|
|
char *postfix = g_malloc0(PATH_MAX);
|
|
char *desc_line = g_malloc0(BUF_SIZE);
|
|
char *ext_filename = g_malloc0(PATH_MAX);
|
|
char *desc_filename = g_malloc0(PATH_MAX);
|
|
char *parent_desc_line = g_malloc0(BUF_SIZE);
|
|
bool zeroed_grain;
|
|
bool compat6;
|
|
VMDKCreateOptsData data;
|
|
char *backing_fmt = NULL;
|
|
|
|
backing_fmt = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FMT);
|
|
if (backing_fmt && strcmp(backing_fmt, "vmdk") != 0) {
|
|
error_setg(errp, "backing_file must be a vmdk image");
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
|
|
if (filename_decompose(filename, path, prefix, postfix, PATH_MAX, errp)) {
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
/* Read out options */
|
|
total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
|
|
BDRV_SECTOR_SIZE);
|
|
adapter_type = qemu_opt_get_del(opts, BLOCK_OPT_ADAPTER_TYPE);
|
|
backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
|
|
hw_version = qemu_opt_get_del(opts, BLOCK_OPT_HWVERSION);
|
|
toolsversion = qemu_opt_get_del(opts, BLOCK_OPT_TOOLSVERSION);
|
|
compat6 = qemu_opt_get_bool_del(opts, BLOCK_OPT_COMPAT6, false);
|
|
if (strcmp(hw_version, "undefined") == 0) {
|
|
g_free(hw_version);
|
|
hw_version = NULL;
|
|
}
|
|
fmt = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT);
|
|
zeroed_grain = qemu_opt_get_bool_del(opts, BLOCK_OPT_ZEROED_GRAIN, false);
|
|
|
|
if (adapter_type) {
|
|
adapter_type_enum = qapi_enum_parse(&BlockdevVmdkAdapterType_lookup,
|
|
adapter_type,
|
|
BLOCKDEV_VMDK_ADAPTER_TYPE_IDE,
|
|
&local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
} else {
|
|
adapter_type_enum = BLOCKDEV_VMDK_ADAPTER_TYPE_IDE;
|
|
}
|
|
|
|
if (!fmt) {
|
|
/* Default format to monolithicSparse */
|
|
subformat = BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICSPARSE;
|
|
} else {
|
|
subformat = qapi_enum_parse(&BlockdevVmdkSubformat_lookup,
|
|
fmt,
|
|
BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICSPARSE,
|
|
&local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
}
|
|
data = (VMDKCreateOptsData){
|
|
.prefix = prefix,
|
|
.postfix = postfix,
|
|
.path = path,
|
|
.opts = opts,
|
|
};
|
|
ret = vmdk_co_do_create(total_size, subformat, adapter_type_enum,
|
|
backing_file, hw_version, toolsversion, compat6,
|
|
zeroed_grain, vmdk_co_create_opts_cb, &data, errp);
|
|
|
|
exit:
|
|
g_free(backing_fmt);
|
|
g_free(adapter_type);
|
|
g_free(backing_file);
|
|
g_free(hw_version);
|
|
g_free(toolsversion);
|
|
g_free(fmt);
|
|
g_free(desc);
|
|
g_free(path);
|
|
g_free(prefix);
|
|
g_free(postfix);
|
|
g_free(desc_line);
|
|
g_free(ext_filename);
|
|
g_free(desc_filename);
|
|
g_free(parent_desc_line);
|
|
return ret;
|
|
}
|
|
|
|
static BlockBackend *vmdk_co_create_cb(int64_t size, int idx,
|
|
bool flat, bool split, bool compress,
|
|
bool zeroed_grain, void *opaque,
|
|
Error **errp)
|
|
{
|
|
int ret;
|
|
BlockDriverState *bs;
|
|
BlockBackend *blk;
|
|
BlockdevCreateOptionsVmdk *opts = opaque;
|
|
|
|
if (idx == 0) {
|
|
bs = bdrv_open_blockdev_ref(opts->file, errp);
|
|
} else {
|
|
int i;
|
|
BlockdevRefList *list = opts->extents;
|
|
for (i = 1; i < idx; i++) {
|
|
if (!list || !list->next) {
|
|
error_setg(errp, "Extent [%d] not specified", i);
|
|
return NULL;
|
|
}
|
|
list = list->next;
|
|
}
|
|
if (!list) {
|
|
error_setg(errp, "Extent [%d] not specified", idx - 1);
|
|
return NULL;
|
|
}
|
|
bs = bdrv_open_blockdev_ref(list->value, errp);
|
|
}
|
|
if (!bs) {
|
|
return NULL;
|
|
}
|
|
blk = blk_new_with_bs(bs,
|
|
BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE | BLK_PERM_RESIZE,
|
|
BLK_PERM_ALL, errp);
|
|
if (!blk) {
|
|
return NULL;
|
|
}
|
|
blk_set_allow_write_beyond_eof(blk, true);
|
|
bdrv_unref(bs);
|
|
|
|
if (size != -1) {
|
|
ret = vmdk_init_extent(blk, size, flat, compress, zeroed_grain, errp);
|
|
if (ret) {
|
|
blk_unref(blk);
|
|
blk = NULL;
|
|
}
|
|
}
|
|
return blk;
|
|
}
|
|
|
|
static int coroutine_fn vmdk_co_create(BlockdevCreateOptions *create_options,
|
|
Error **errp)
|
|
{
|
|
int ret;
|
|
BlockdevCreateOptionsVmdk *opts;
|
|
|
|
opts = &create_options->u.vmdk;
|
|
|
|
/* Validate options */
|
|
if (!QEMU_IS_ALIGNED(opts->size, BDRV_SECTOR_SIZE)) {
|
|
error_setg(errp, "Image size must be a multiple of 512 bytes");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
ret = vmdk_co_do_create(opts->size,
|
|
opts->subformat,
|
|
opts->adapter_type,
|
|
opts->backing_file,
|
|
opts->hwversion,
|
|
opts->toolsversion,
|
|
false,
|
|
opts->zeroed_grain,
|
|
vmdk_co_create_cb,
|
|
opts, errp);
|
|
return ret;
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void vmdk_close(BlockDriverState *bs)
|
|
{
|
|
BDRVVmdkState *s = bs->opaque;
|
|
|
|
vmdk_free_extents(bs);
|
|
g_free(s->create_type);
|
|
|
|
migrate_del_blocker(s->migration_blocker);
|
|
error_free(s->migration_blocker);
|
|
}
|
|
|
|
static int64_t vmdk_get_allocated_file_size(BlockDriverState *bs)
|
|
{
|
|
int i;
|
|
int64_t ret = 0;
|
|
int64_t r;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
|
|
ret = bdrv_get_allocated_file_size(bs->file->bs);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
for (i = 0; i < s->num_extents; i++) {
|
|
if (s->extents[i].file == bs->file) {
|
|
continue;
|
|
}
|
|
r = bdrv_get_allocated_file_size(s->extents[i].file->bs);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
ret += r;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_has_zero_init(BlockDriverState *bs)
|
|
{
|
|
int i;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
|
|
/* If has a flat extent and its underlying storage doesn't have zero init,
|
|
* return 0. */
|
|
for (i = 0; i < s->num_extents; i++) {
|
|
if (s->extents[i].flat) {
|
|
if (!bdrv_has_zero_init(s->extents[i].file->bs)) {
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static ImageInfo *vmdk_get_extent_info(VmdkExtent *extent)
|
|
{
|
|
ImageInfo *info = g_new0(ImageInfo, 1);
|
|
|
|
bdrv_refresh_filename(extent->file->bs);
|
|
*info = (ImageInfo){
|
|
.filename = g_strdup(extent->file->bs->filename),
|
|
.format = g_strdup(extent->type),
|
|
.virtual_size = extent->sectors * BDRV_SECTOR_SIZE,
|
|
.compressed = extent->compressed,
|
|
.has_compressed = extent->compressed,
|
|
.cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE,
|
|
.has_cluster_size = !extent->flat,
|
|
};
|
|
|
|
return info;
|
|
}
|
|
|
|
static int coroutine_fn vmdk_co_check(BlockDriverState *bs,
|
|
BdrvCheckResult *result,
|
|
BdrvCheckMode fix)
|
|
{
|
|
BDRVVmdkState *s = bs->opaque;
|
|
VmdkExtent *extent = NULL;
|
|
int64_t sector_num = 0;
|
|
int64_t total_sectors = bdrv_nb_sectors(bs);
|
|
int ret;
|
|
uint64_t cluster_offset;
|
|
|
|
if (fix) {
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
for (;;) {
|
|
if (sector_num >= total_sectors) {
|
|
return 0;
|
|
}
|
|
extent = find_extent(s, sector_num, extent);
|
|
if (!extent) {
|
|
fprintf(stderr,
|
|
"ERROR: could not find extent for sector %" PRId64 "\n",
|
|
sector_num);
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
ret = get_cluster_offset(bs, extent, NULL,
|
|
sector_num << BDRV_SECTOR_BITS,
|
|
false, &cluster_offset, 0, 0);
|
|
if (ret == VMDK_ERROR) {
|
|
fprintf(stderr,
|
|
"ERROR: could not get cluster_offset for sector %"
|
|
PRId64 "\n", sector_num);
|
|
break;
|
|
}
|
|
if (ret == VMDK_OK) {
|
|
int64_t extent_len = bdrv_getlength(extent->file->bs);
|
|
if (extent_len < 0) {
|
|
fprintf(stderr,
|
|
"ERROR: could not get extent file length for sector %"
|
|
PRId64 "\n", sector_num);
|
|
ret = extent_len;
|
|
break;
|
|
}
|
|
if (cluster_offset >= extent_len) {
|
|
fprintf(stderr,
|
|
"ERROR: cluster offset for sector %"
|
|
PRId64 " points after EOF\n", sector_num);
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
}
|
|
sector_num += extent->cluster_sectors;
|
|
}
|
|
|
|
result->corruptions++;
|
|
return ret;
|
|
}
|
|
|
|
static ImageInfoSpecific *vmdk_get_specific_info(BlockDriverState *bs,
|
|
Error **errp)
|
|
{
|
|
int i;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
ImageInfoSpecific *spec_info = g_new0(ImageInfoSpecific, 1);
|
|
ImageInfoList **tail;
|
|
|
|
*spec_info = (ImageInfoSpecific){
|
|
.type = IMAGE_INFO_SPECIFIC_KIND_VMDK,
|
|
.u = {
|
|
.vmdk.data = g_new0(ImageInfoSpecificVmdk, 1),
|
|
},
|
|
};
|
|
|
|
*spec_info->u.vmdk.data = (ImageInfoSpecificVmdk) {
|
|
.create_type = g_strdup(s->create_type),
|
|
.cid = s->cid,
|
|
.parent_cid = s->parent_cid,
|
|
};
|
|
|
|
tail = &spec_info->u.vmdk.data->extents;
|
|
for (i = 0; i < s->num_extents; i++) {
|
|
QAPI_LIST_APPEND(tail, vmdk_get_extent_info(&s->extents[i]));
|
|
}
|
|
|
|
return spec_info;
|
|
}
|
|
|
|
static bool vmdk_extents_type_eq(const VmdkExtent *a, const VmdkExtent *b)
|
|
{
|
|
return a->flat == b->flat &&
|
|
a->compressed == b->compressed &&
|
|
(a->flat || a->cluster_sectors == b->cluster_sectors);
|
|
}
|
|
|
|
static int vmdk_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
|
|
{
|
|
int i;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
assert(s->num_extents);
|
|
|
|
/* See if we have multiple extents but they have different cases */
|
|
for (i = 1; i < s->num_extents; i++) {
|
|
if (!vmdk_extents_type_eq(&s->extents[0], &s->extents[i])) {
|
|
return -ENOTSUP;
|
|
}
|
|
}
|
|
bdi->needs_compressed_writes = s->extents[0].compressed;
|
|
if (!s->extents[0].flat) {
|
|
bdi->cluster_size = s->extents[0].cluster_sectors << BDRV_SECTOR_BITS;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void vmdk_gather_child_options(BlockDriverState *bs, QDict *target,
|
|
bool backing_overridden)
|
|
{
|
|
/* No children but file and backing can be explicitly specified (TODO) */
|
|
qdict_put(target, "file",
|
|
qobject_ref(bs->file->bs->full_open_options));
|
|
|
|
if (backing_overridden) {
|
|
if (bs->backing) {
|
|
qdict_put(target, "backing",
|
|
qobject_ref(bs->backing->bs->full_open_options));
|
|
} else {
|
|
qdict_put_null(target, "backing");
|
|
}
|
|
}
|
|
}
|
|
|
|
static QemuOptsList vmdk_create_opts = {
|
|
.name = "vmdk-create-opts",
|
|
.head = QTAILQ_HEAD_INITIALIZER(vmdk_create_opts.head),
|
|
.desc = {
|
|
{
|
|
.name = BLOCK_OPT_SIZE,
|
|
.type = QEMU_OPT_SIZE,
|
|
.help = "Virtual disk size"
|
|
},
|
|
{
|
|
.name = BLOCK_OPT_ADAPTER_TYPE,
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "Virtual adapter type, can be one of "
|
|
"ide (default), lsilogic, buslogic or legacyESX"
|
|
},
|
|
{
|
|
.name = BLOCK_OPT_BACKING_FILE,
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "File name of a base image"
|
|
},
|
|
{
|
|
.name = BLOCK_OPT_BACKING_FMT,
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "Must be 'vmdk' if present",
|
|
},
|
|
{
|
|
.name = BLOCK_OPT_COMPAT6,
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "VMDK version 6 image",
|
|
.def_value_str = "off"
|
|
},
|
|
{
|
|
.name = BLOCK_OPT_HWVERSION,
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "VMDK hardware version",
|
|
.def_value_str = "undefined"
|
|
},
|
|
{
|
|
.name = BLOCK_OPT_TOOLSVERSION,
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "VMware guest tools version",
|
|
},
|
|
{
|
|
.name = BLOCK_OPT_SUBFMT,
|
|
.type = QEMU_OPT_STRING,
|
|
.help =
|
|
"VMDK flat extent format, can be one of "
|
|
"{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} "
|
|
},
|
|
{
|
|
.name = BLOCK_OPT_ZEROED_GRAIN,
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "Enable efficient zero writes "
|
|
"using the zeroed-grain GTE feature"
|
|
},
|
|
{ /* end of list */ }
|
|
}
|
|
};
|
|
|
|
static BlockDriver bdrv_vmdk = {
|
|
.format_name = "vmdk",
|
|
.instance_size = sizeof(BDRVVmdkState),
|
|
.bdrv_probe = vmdk_probe,
|
|
.bdrv_open = vmdk_open,
|
|
.bdrv_co_check = vmdk_co_check,
|
|
.bdrv_reopen_prepare = vmdk_reopen_prepare,
|
|
.bdrv_reopen_commit = vmdk_reopen_commit,
|
|
.bdrv_reopen_abort = vmdk_reopen_abort,
|
|
.bdrv_child_perm = bdrv_default_perms,
|
|
.bdrv_co_preadv = vmdk_co_preadv,
|
|
.bdrv_co_pwritev = vmdk_co_pwritev,
|
|
.bdrv_co_pwritev_compressed = vmdk_co_pwritev_compressed,
|
|
.bdrv_co_pwrite_zeroes = vmdk_co_pwrite_zeroes,
|
|
.bdrv_close = vmdk_close,
|
|
.bdrv_co_create_opts = vmdk_co_create_opts,
|
|
.bdrv_co_create = vmdk_co_create,
|
|
.bdrv_co_block_status = vmdk_co_block_status,
|
|
.bdrv_get_allocated_file_size = vmdk_get_allocated_file_size,
|
|
.bdrv_has_zero_init = vmdk_has_zero_init,
|
|
.bdrv_get_specific_info = vmdk_get_specific_info,
|
|
.bdrv_refresh_limits = vmdk_refresh_limits,
|
|
.bdrv_get_info = vmdk_get_info,
|
|
.bdrv_gather_child_options = vmdk_gather_child_options,
|
|
|
|
.is_format = true,
|
|
.supports_backing = true,
|
|
.create_opts = &vmdk_create_opts,
|
|
};
|
|
|
|
static void bdrv_vmdk_init(void)
|
|
{
|
|
bdrv_register(&bdrv_vmdk);
|
|
}
|
|
|
|
block_init(bdrv_vmdk_init);
|