* THE SOFTWARE.
*/
-#include "qemu-common.h"
+#include "qemu/osdep.h"
+#include "qapi/error.h"
#include "block/block_int.h"
+#include "sysemu/block-backend.h"
#include "qapi/qmp/qerror.h"
#include "qemu/error-report.h"
#include "qemu/module.h"
+#include "qemu/bswap.h"
#include "migration/migration.h"
+#include "qemu/cutils.h"
#include <zlib.h>
-#include <glib.h>
#define VMDK3_MAGIC (('C' << 24) | ('O' << 16) | ('W' << 8) | 'D')
#define VMDK4_MAGIC (('K' << 24) | ('D' << 16) | ('M' << 8) | 'V')
static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent)
{
- char desc[DESC_SIZE];
+ char *desc;
uint32_t cid = 0xffffffff;
const char *p_name, *cid_str;
size_t cid_str_size;
BDRVVmdkState *s = bs->opaque;
int ret;
- ret = bdrv_pread(bs->file->bs, s->desc_offset, desc, DESC_SIZE);
+ desc = g_malloc0(DESC_SIZE);
+ ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE);
if (ret < 0) {
+ g_free(desc);
return 0;
}
sscanf(p_name, "%" SCNx32, &cid);
}
+ g_free(desc);
return cid;
}
static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid)
{
- char desc[DESC_SIZE], tmp_desc[DESC_SIZE];
+ char *desc, *tmp_desc;
char *p_name, *tmp_str;
BDRVVmdkState *s = bs->opaque;
- int ret;
+ int ret = 0;
- ret = bdrv_pread(bs->file->bs, s->desc_offset, desc, DESC_SIZE);
+ desc = g_malloc0(DESC_SIZE);
+ tmp_desc = g_malloc0(DESC_SIZE);
+ ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE);
if (ret < 0) {
- return ret;
+ goto out;
}
desc[DESC_SIZE - 1] = '\0';
tmp_str = strstr(desc, "parentCID");
if (tmp_str == NULL) {
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
- pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str);
+ pstrcpy(tmp_desc, DESC_SIZE, tmp_str);
p_name = strstr(desc, "CID");
if (p_name != NULL) {
p_name += sizeof("CID");
- snprintf(p_name, sizeof(desc) - (p_name - desc), "%" PRIx32 "\n", cid);
- pstrcat(desc, sizeof(desc), tmp_desc);
+ snprintf(p_name, DESC_SIZE - (p_name - desc), "%" PRIx32 "\n", cid);
+ pstrcat(desc, DESC_SIZE, tmp_desc);
}
- ret = bdrv_pwrite_sync(bs->file->bs, s->desc_offset, desc, DESC_SIZE);
- if (ret < 0) {
- return ret;
- }
+ ret = bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE);
- return 0;
+out:
+ g_free(desc);
+ g_free(tmp_desc);
+ return ret;
}
static int vmdk_is_cid_valid(BlockDriverState *bs)
{
BDRVVmdkState *s = bs->opaque;
- BlockDriverState *p_bs = bs->backing_hd;
uint32_t cur_pcid;
- if (!s->cid_checked && p_bs) {
+ if (!s->cid_checked && bs->backing) {
+ BlockDriverState *p_bs = bs->backing->bs;
+
cur_pcid = vmdk_read_cid(p_bs, 0);
if (s->parent_cid != cur_pcid) {
/* CID not valid */
static int vmdk_parent_open(BlockDriverState *bs)
{
char *p_name;
- char desc[DESC_SIZE + 1];
+ char *desc;
BDRVVmdkState *s = bs->opaque;
int ret;
- desc[DESC_SIZE] = '\0';
- ret = bdrv_pread(bs->file->bs, s->desc_offset, desc, DESC_SIZE);
+ desc = g_malloc0(DESC_SIZE + 1);
+ ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE);
if (ret < 0) {
- return ret;
+ goto out;
}
+ ret = 0;
p_name = strstr(desc, "parentFileNameHint");
if (p_name != NULL) {
p_name += sizeof("parentFileNameHint") + 1;
end_name = strchr(p_name, '\"');
if (end_name == NULL) {
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
if ((end_name - p_name) > sizeof(bs->backing_file) - 1) {
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
pstrcpy(bs->backing_file, end_name - p_name + 1, p_name);
}
- return 0;
+out:
+ g_free(desc);
+ return ret;
}
/* Create and append extent to the extent array. Return the added VmdkExtent
return -ENOMEM;
}
- ret = bdrv_pread(extent->file->bs,
+ ret = bdrv_pread(extent->file,
extent->l1_table_offset,
extent->l1_table,
l1_size);
ret = -ENOMEM;
goto fail_l1;
}
- ret = bdrv_pread(extent->file->bs,
+ ret = bdrv_pread(extent->file,
extent->l1_backup_table_offset,
extent->l1_backup_table,
l1_size);
VMDK3Header header;
VmdkExtent *extent;
- ret = bdrv_pread(file->bs, sizeof(magic), &header, sizeof(header));
+ ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header));
if (ret < 0) {
error_setg_errno(errp, -ret,
"Could not read header from file '%s'",
static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf,
QDict *options, Error **errp);
-static char *vmdk_read_desc(BlockDriverState *file, uint64_t desc_offset,
- 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);
+ size = bdrv_getlength(file->bs);
if (size < 0) {
error_setg_errno(errp, -size, "Could not access file");
return NULL;
VmdkExtent *extent;
BDRVVmdkState *s = bs->opaque;
int64_t l1_backup_offset = 0;
+ bool compressed;
- ret = bdrv_pread(file->bs, sizeof(magic), &header, sizeof(header));
+ ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header));
if (ret < 0) {
error_setg_errno(errp, -ret,
"Could not read header from file '%s'",
if (header.capacity == 0) {
uint64_t desc_offset = le64_to_cpu(header.desc_offset);
if (desc_offset) {
- char *buf = vmdk_read_desc(file->bs, desc_offset << 9, errp);
+ char *buf = vmdk_read_desc(file, desc_offset << 9, errp);
if (!buf) {
return -EINVAL;
}
} QEMU_PACKED eos_marker;
} QEMU_PACKED footer;
- ret = bdrv_pread(file->bs,
+ ret = bdrv_pread(file,
bs->file->bs->total_sectors * 512 - 1536,
&footer, sizeof(footer));
if (ret < 0) {
header = footer.header;
}
+ compressed =
+ le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE;
if (le32_to_cpu(header.version) > 3) {
- char buf[64];
- snprintf(buf, sizeof(buf), "VMDK version %" PRId32,
- le32_to_cpu(header.version));
- error_setg(errp, QERR_UNKNOWN_BLOCK_FORMAT_FEATURE,
- bdrv_get_device_or_node_name(bs), "vmdk", buf);
+ 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)) {
+ } 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
}
}
+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,
const char *desc_file_path, QDict *options,
Error **errp)
char access[11];
char type[11];
char fname[512];
- const char *p = desc;
+ const char *p, *np;
int64_t sectors = 0;
int64_t flat_offset;
char *extent_path;
char extent_opt_prefix[32];
Error *local_err = NULL;
- while (*p) {
+ 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
matches = sscanf(p, "%10s %" SCNd64 " %10s \"%511[^\n\r\"]\" %" SCNd64,
access, §ors, type, fname, &flat_offset);
if (matches < 4 || strcmp(access, "RW")) {
- goto next_line;
+ continue;
} else if (!strcmp(type, "FLAT")) {
if (matches != 5 || flat_offset < 0) {
- error_setg(errp, "Invalid extent lines: \n%s", p);
- return -EINVAL;
+ goto invalid;
}
} else if (!strcmp(type, "VMFS")) {
if (matches == 4) {
flat_offset = 0;
} else {
- error_setg(errp, "Invalid extent lines:\n%s", p);
- return -EINVAL;
+ goto invalid;
}
} else if (matches != 4) {
- error_setg(errp, "Invalid extent lines:\n%s", p);
- return -EINVAL;
+ goto invalid;
}
if (sectors <= 0 ||
(strcmp(type, "FLAT") && strcmp(type, "SPARSE") &&
strcmp(type, "VMFS") && strcmp(type, "VMFSSPARSE")) ||
(strcmp(access, "RW"))) {
- goto next_line;
+ continue;
}
if (!path_is_absolute(fname) && !path_has_protocol(fname) &&
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->bs, 0, errp);
+ char *buf = vmdk_read_desc(extent_file, 0, errp);
if (!buf) {
ret = -EINVAL;
} else {
return -ENOTSUP;
}
extent->type = g_strdup(type);
-next_line:
- /* move to next line */
- while (*p) {
- if (*p == '\n') {
- p++;
- break;
- }
- p++;
- }
}
return 0;
+
+invalid:
+ np = next_line(p);
+ assert(np != p);
+ if (np[-1] == '\n') {
+ np--;
+ }
+ error_setg(errp, "Invalid extent line: %.*s", (int)(np - p), p);
+ return -EINVAL;
}
static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf,
BDRVVmdkState *s = bs->opaque;
uint32_t magic;
- buf = vmdk_read_desc(bs->file->bs, 0, errp);
+ buf = vmdk_read_desc(bs->file, 0, errp);
if (!buf) {
return -EINVAL;
}
for (i = 0; i < s->num_extents; i++) {
if (!s->extents[i].flat) {
- bs->bl.write_zeroes_alignment =
- MAX(bs->bl.write_zeroes_alignment,
- s->extents[i].cluster_sectors);
+ bs->bl.pwrite_zeroes_alignment =
+ MAX(bs->bl.pwrite_zeroes_alignment,
+ s->extents[i].cluster_sectors << BDRV_SECTOR_BITS);
}
}
}
*/
static int get_whole_cluster(BlockDriverState *bs,
VmdkExtent *extent,
- uint64_t cluster_sector_num,
- uint64_t sector_num,
- uint64_t skip_start_sector,
- uint64_t skip_end_sector)
+ uint64_t cluster_offset,
+ uint64_t offset,
+ uint64_t skip_start_bytes,
+ uint64_t skip_end_bytes)
{
int ret = VMDK_OK;
int64_t cluster_bytes;
uint8_t *whole_grain;
/* For COW, align request sector_num to cluster start */
- sector_num = QEMU_ALIGN_DOWN(sector_num, extent->cluster_sectors);
cluster_bytes = extent->cluster_sectors << BDRV_SECTOR_BITS;
+ offset = QEMU_ALIGN_DOWN(offset, cluster_bytes);
whole_grain = qemu_blockalign(bs, cluster_bytes);
- if (!bs->backing_hd) {
- memset(whole_grain, 0, skip_start_sector << BDRV_SECTOR_BITS);
- memset(whole_grain + (skip_end_sector << BDRV_SECTOR_BITS), 0,
- cluster_bytes - (skip_end_sector << BDRV_SECTOR_BITS));
+ if (!bs->backing) {
+ memset(whole_grain, 0, skip_start_bytes);
+ memset(whole_grain + skip_end_bytes, 0, cluster_bytes - skip_end_bytes);
}
- assert(skip_end_sector <= extent->cluster_sectors);
+ 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_hd && !vmdk_is_cid_valid(bs)) {
+ if (bs->backing && !vmdk_is_cid_valid(bs)) {
ret = VMDK_ERROR;
goto exit;
}
/* Read backing data before skip range */
- if (skip_start_sector > 0) {
- if (bs->backing_hd) {
- ret = bdrv_read(bs->backing_hd, sector_num,
- whole_grain, skip_start_sector);
+ if (skip_start_bytes > 0) {
+ if (bs->backing) {
+ ret = bdrv_pread(bs->backing, offset, whole_grain,
+ skip_start_bytes);
if (ret < 0) {
ret = VMDK_ERROR;
goto exit;
}
}
- ret = bdrv_write(extent->file->bs, cluster_sector_num, whole_grain,
- skip_start_sector);
+ ret = bdrv_pwrite(extent->file, cluster_offset, whole_grain,
+ skip_start_bytes);
if (ret < 0) {
ret = VMDK_ERROR;
goto exit;
}
}
/* Read backing data after skip range */
- if (skip_end_sector < extent->cluster_sectors) {
- if (bs->backing_hd) {
- ret = bdrv_read(bs->backing_hd, sector_num + skip_end_sector,
- whole_grain + (skip_end_sector << BDRV_SECTOR_BITS),
- extent->cluster_sectors - skip_end_sector);
+ if (skip_end_bytes < cluster_bytes) {
+ if (bs->backing) {
+ ret = bdrv_pread(bs->backing, offset + skip_end_bytes,
+ whole_grain + skip_end_bytes,
+ cluster_bytes - skip_end_bytes);
if (ret < 0) {
ret = VMDK_ERROR;
goto exit;
}
}
- ret = bdrv_write(extent->file->bs, cluster_sector_num + skip_end_sector,
- whole_grain + (skip_end_sector << BDRV_SECTOR_BITS),
- extent->cluster_sectors - skip_end_sector);
+ ret = bdrv_pwrite(extent->file, cluster_offset + skip_end_bytes,
+ whole_grain + skip_end_bytes,
+ cluster_bytes - skip_end_bytes);
if (ret < 0) {
ret = VMDK_ERROR;
goto exit;
}
}
+ ret = VMDK_OK;
exit:
qemu_vfree(whole_grain);
return ret;
{
offset = cpu_to_le32(offset);
/* update L2 table */
- if (bdrv_pwrite_sync(
- extent->file->bs,
+ if (bdrv_pwrite_sync(extent->file,
((int64_t)m_data->l2_offset * 512)
+ (m_data->l2_index * sizeof(offset)),
&offset, sizeof(offset)) < 0) {
/* 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_sync(
- extent->file->bs,
+ if (bdrv_pwrite_sync(extent->file,
((int64_t)m_data->l2_offset * 512)
+ (m_data->l2_index * sizeof(offset)),
&offset, sizeof(offset)) < 0) {
uint64_t offset,
bool allocate,
uint64_t *cluster_offset,
- uint64_t skip_start_sector,
- uint64_t skip_end_sector)
+ uint64_t skip_start_bytes,
+ uint64_t skip_end_bytes)
{
unsigned int l1_index, l2_offset, l2_index;
int min_index, i, j;
}
}
l2_table = extent->l2_cache + (min_index * extent->l2_size);
- if (bdrv_pread(
- extent->file->bs,
+ if (bdrv_pread(extent->file,
(int64_t)l2_offset * 512,
l2_table,
extent->l2_size * sizeof(uint32_t)
* This problem may occur because of insufficient space on host disk
* or inappropriate VM shutdown.
*/
- ret = get_whole_cluster(bs, extent,
- cluster_sector,
- offset >> BDRV_SECTOR_BITS,
- skip_start_sector, skip_end_sector);
+ ret = get_whole_cluster(bs, extent, cluster_sector * BDRV_SECTOR_SIZE,
+ offset, skip_start_bytes, skip_end_bytes);
if (ret) {
return ret;
}
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 inline uint64_t vmdk_find_index_in_cluster(VmdkExtent *extent,
int64_t sector_num)
{
- uint64_t index_in_cluster, extent_begin_sector, extent_relative_sector_num;
-
- extent_begin_sector = extent->end_sector - extent->sectors;
- extent_relative_sector_num = sector_num - extent_begin_sector;
- index_in_cluster = extent_relative_sector_num % extent->cluster_sectors;
- return index_in_cluster;
+ uint64_t offset;
+ offset = vmdk_find_offset_in_cluster(extent, sector_num * BDRV_SECTOR_SIZE);
+ return offset / BDRV_SECTOR_SIZE;
}
static int64_t coroutine_fn vmdk_co_get_block_status(BlockDriverState *bs,
- int64_t sector_num, int nb_sectors, int *pnum)
+ int64_t sector_num, int nb_sectors, int *pnum, BlockDriverState **file)
{
BDRVVmdkState *s = bs->opaque;
int64_t index_in_cluster, n, ret;
0, 0);
qemu_co_mutex_unlock(&s->lock);
+ index_in_cluster = vmdk_find_index_in_cluster(extent, sector_num);
switch (ret) {
case VMDK_ERROR:
ret = -EIO;
break;
case VMDK_OK:
ret = BDRV_BLOCK_DATA;
- if (extent->file == bs->file && !extent->compressed) {
- ret |= BDRV_BLOCK_OFFSET_VALID | offset;
+ if (!extent->compressed) {
+ ret |= BDRV_BLOCK_OFFSET_VALID;
+ ret |= (offset + (index_in_cluster << BDRV_SECTOR_BITS))
+ & BDRV_BLOCK_OFFSET_MASK;
}
-
+ *file = extent->file->bs;
break;
}
- index_in_cluster = vmdk_find_index_in_cluster(extent, sector_num);
n = extent->cluster_sectors - index_in_cluster;
if (n > nb_sectors) {
n = nb_sectors;
}
static int vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset,
- int64_t offset_in_cluster, const uint8_t *buf,
- int nb_sectors, int64_t sector_num)
+ 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;
- const uint8_t *write_buf = buf;
- int write_len = nb_sectors * 512;
+ QEMUIOVector local_qiov;
+ struct iovec iov;
int64_t write_offset;
int64_t write_end_sector;
if (extent->compressed) {
+ void *compressed_data;
+
if (!extent->has_marker) {
ret = -EINVAL;
goto out;
}
buf_len = (extent->cluster_sectors << 9) * 2;
data = g_malloc(buf_len + sizeof(VmdkGrainMarker));
- if (compress(data->data, &buf_len, buf, nb_sectors << 9) != Z_OK ||
- buf_len == 0) {
+
+ 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 = sector_num;
+
+ data->lba = offset >> BDRV_SECTOR_BITS;
data->size = buf_len;
- write_buf = (uint8_t *)data;
- write_len = buf_len + sizeof(VmdkGrainMarker);
+
+ n_bytes = buf_len + sizeof(VmdkGrainMarker);
+ iov = (struct iovec) {
+ .iov_base = data,
+ .iov_len = n_bytes,
+ };
+ qemu_iovec_init_external(&local_qiov, &iov, 1);
+ } else {
+ qemu_iovec_init(&local_qiov, qiov->niov);
+ qemu_iovec_concat(&local_qiov, qiov, qiov_offset, n_bytes);
}
+
write_offset = cluster_offset + offset_in_cluster,
- ret = bdrv_pwrite(extent->file->bs, write_offset, write_buf, write_len);
+ ret = bdrv_co_pwritev(extent->file, write_offset, n_bytes,
+ &local_qiov, 0);
- write_end_sector = DIV_ROUND_UP(write_offset + write_len, BDRV_SECTOR_SIZE);
+ write_end_sector = DIV_ROUND_UP(write_offset + n_bytes, BDRV_SECTOR_SIZE);
if (extent->compressed) {
extent->next_cluster_sector = write_end_sector;
write_end_sector);
}
- if (ret != write_len) {
- ret = ret < 0 ? ret : -EIO;
+ if (ret < 0) {
goto out;
}
ret = 0;
out:
g_free(data);
+ if (!extent->compressed) {
+ qemu_iovec_destroy(&local_qiov);
+ }
return ret;
}
static int vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset,
- int64_t offset_in_cluster, uint8_t *buf,
- int nb_sectors)
+ int64_t offset_in_cluster, QEMUIOVector *qiov,
+ int bytes)
{
int ret;
int cluster_bytes, buf_bytes;
if (!extent->compressed) {
- ret = bdrv_pread(extent->file->bs,
- cluster_offset + offset_in_cluster,
- buf, nb_sectors * 512);
- if (ret == nb_sectors * 512) {
- return 0;
- } else {
- return -EIO;
+ 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);
- ret = bdrv_pread(extent->file->bs,
+ ret = bdrv_pread(extent->file,
cluster_offset,
cluster_buf, buf_bytes);
if (ret < 0) {
}
if (offset_in_cluster < 0 ||
- offset_in_cluster + nb_sectors * 512 > buf_len) {
+ offset_in_cluster + bytes > buf_len) {
ret = -EINVAL;
goto out;
}
- memcpy(buf, uncomp_buf + offset_in_cluster, nb_sectors * 512);
+ qemu_iovec_from_buf(qiov, 0, uncomp_buf + offset_in_cluster, bytes);
ret = 0;
out:
return ret;
}
-static int vmdk_read(BlockDriverState *bs, int64_t sector_num,
- uint8_t *buf, int nb_sectors)
+static int coroutine_fn
+vmdk_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
+ QEMUIOVector *qiov, int flags)
{
BDRVVmdkState *s = bs->opaque;
int ret;
- uint64_t n, index_in_cluster;
+ uint64_t n_bytes, offset_in_cluster;
VmdkExtent *extent = NULL;
+ QEMUIOVector local_qiov;
uint64_t cluster_offset;
+ uint64_t bytes_done = 0;
- while (nb_sectors > 0) {
- extent = find_extent(s, sector_num, extent);
+ 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) {
- return -EIO;
+ ret = -EIO;
+ goto fail;
}
ret = get_cluster_offset(bs, extent, NULL,
- sector_num << 9, false, &cluster_offset,
- 0, 0);
- index_in_cluster = vmdk_find_index_in_cluster(extent, sector_num);
- n = extent->cluster_sectors - index_in_cluster;
- if (n > nb_sectors) {
- n = nb_sectors;
- }
+ 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_hd && ret != VMDK_ZEROED) {
+ if (bs->backing && ret != VMDK_ZEROED) {
if (!vmdk_is_cid_valid(bs)) {
- return -EINVAL;
+ ret = -EINVAL;
+ goto fail;
}
- ret = bdrv_read(bs->backing_hd, sector_num, buf, n);
+
+ qemu_iovec_reset(&local_qiov);
+ qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes);
+
+ ret = bdrv_co_preadv(bs->backing, offset, n_bytes,
+ &local_qiov, 0);
if (ret < 0) {
- return ret;
+ goto fail;
}
} else {
- memset(buf, 0, 512 * n);
+ qemu_iovec_memset(qiov, bytes_done, 0, n_bytes);
}
} else {
- ret = vmdk_read_extent(extent,
- cluster_offset, index_in_cluster * 512,
- buf, n);
+ 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) {
- return ret;
+ goto fail;
}
}
- nb_sectors -= n;
- sector_num += n;
- buf += n * 512;
+ bytes -= n_bytes;
+ offset += n_bytes;
+ bytes_done += n_bytes;
}
- return 0;
-}
-static coroutine_fn int vmdk_co_read(BlockDriverState *bs, int64_t sector_num,
- uint8_t *buf, int nb_sectors)
-{
- int ret;
- BDRVVmdkState *s = bs->opaque;
- qemu_co_mutex_lock(&s->lock);
- ret = vmdk_read(bs, sector_num, buf, nb_sectors);
+ ret = 0;
+fail:
qemu_co_mutex_unlock(&s->lock);
+ qemu_iovec_destroy(&local_qiov);
+
return ret;
}
*
* Returns: error code with 0 for success.
*/
-static int vmdk_write(BlockDriverState *bs, int64_t sector_num,
- const uint8_t *buf, int nb_sectors,
- bool zeroed, bool zero_dry_run)
+static int 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 index_in_cluster, n;
+ int64_t offset_in_cluster, n_bytes;
uint64_t cluster_offset;
+ uint64_t bytes_done = 0;
VmdkMetaData m_data;
- if (sector_num > bs->total_sectors) {
- error_report("Wrong offset: sector_num=0x%" PRIx64
- " total_sectors=0x%" PRIx64 "\n",
- sector_num, bs->total_sectors);
+ 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 (nb_sectors > 0) {
- extent = find_extent(s, sector_num, extent);
+ while (bytes > 0) {
+ extent = find_extent(s, offset >> BDRV_SECTOR_BITS, extent);
if (!extent) {
return -EIO;
}
- index_in_cluster = vmdk_find_index_in_cluster(extent, sector_num);
- n = extent->cluster_sectors - index_in_cluster;
- if (n > nb_sectors) {
- n = nb_sectors;
- }
- ret = get_cluster_offset(bs, extent, &m_data, sector_num << 9,
+ 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,
- index_in_cluster, index_in_cluster + n);
+ &cluster_offset, offset_in_cluster,
+ offset_in_cluster + n_bytes);
if (extent->compressed) {
if (ret == VMDK_OK) {
/* Refuse write to allocated cluster for streamOptimized */
return -EIO;
} else {
/* allocate */
- ret = get_cluster_offset(bs, extent, &m_data, sector_num << 9,
+ ret = get_cluster_offset(bs, extent, &m_data, offset,
true, &cluster_offset, 0, 0);
}
}
if (zeroed) {
/* Do zeroed write, buf is ignored */
if (extent->has_zero_grain &&
- index_in_cluster == 0 &&
- n >= extent->cluster_sectors) {
- n = extent->cluster_sectors;
+ offset_in_cluster == 0 &&
+ n_bytes >= extent->cluster_sectors * BDRV_SECTOR_SIZE) {
+ n_bytes = extent->cluster_sectors * BDRV_SECTOR_SIZE;
if (!zero_dry_run) {
/* update L2 tables */
if (vmdk_L2update(extent, &m_data, VMDK_GTE_ZEROED)
return -ENOTSUP;
}
} else {
- ret = vmdk_write_extent(extent,
- cluster_offset, index_in_cluster * 512,
- buf, n, sector_num);
+ ret = vmdk_write_extent(extent, cluster_offset, offset_in_cluster,
+ qiov, bytes_done, n_bytes, offset);
if (ret) {
return ret;
}
}
}
}
- nb_sectors -= n;
- sector_num += n;
- buf += n * 512;
+ bytes -= n_bytes;
+ offset += n_bytes;
+ bytes_done += n_bytes;
/* update CID on the first write every time the virtual disk is
* opened */
return 0;
}
-static coroutine_fn int vmdk_co_write(BlockDriverState *bs, int64_t sector_num,
- const uint8_t *buf, int nb_sectors)
+static int coroutine_fn
+vmdk_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
+ QEMUIOVector *qiov, int flags)
{
int ret;
BDRVVmdkState *s = bs->opaque;
qemu_co_mutex_lock(&s->lock);
- ret = vmdk_write(bs, sector_num, buf, nb_sectors, false, false);
+ ret = vmdk_pwritev(bs, offset, bytes, qiov, false, false);
qemu_co_mutex_unlock(&s->lock);
return ret;
}
+typedef struct VmdkWriteCompressedCo {
+ BlockDriverState *bs;
+ int64_t sector_num;
+ const uint8_t *buf;
+ int nb_sectors;
+ int ret;
+} VmdkWriteCompressedCo;
+
+static void vmdk_co_write_compressed(void *opaque)
+{
+ VmdkWriteCompressedCo *co = opaque;
+ QEMUIOVector local_qiov;
+ uint64_t offset = co->sector_num * BDRV_SECTOR_SIZE;
+ uint64_t bytes = co->nb_sectors * BDRV_SECTOR_SIZE;
+
+ struct iovec iov = (struct iovec) {
+ .iov_base = (uint8_t*) co->buf,
+ .iov_len = bytes,
+ };
+ qemu_iovec_init_external(&local_qiov, &iov, 1);
+
+ co->ret = vmdk_pwritev(co->bs, offset, bytes, &local_qiov, false, false);
+}
+
static int vmdk_write_compressed(BlockDriverState *bs,
int64_t sector_num,
const uint8_t *buf,
int nb_sectors)
{
BDRVVmdkState *s = bs->opaque;
+
if (s->num_extents == 1 && s->extents[0].compressed) {
- return vmdk_write(bs, sector_num, buf, nb_sectors, false, false);
+ Coroutine *co;
+ AioContext *aio_context = bdrv_get_aio_context(bs);
+ VmdkWriteCompressedCo data = {
+ .bs = bs,
+ .sector_num = sector_num,
+ .buf = buf,
+ .nb_sectors = nb_sectors,
+ .ret = -EINPROGRESS,
+ };
+ co = qemu_coroutine_create(vmdk_co_write_compressed);
+ qemu_coroutine_enter(co, &data);
+ while (data.ret == -EINPROGRESS) {
+ aio_poll(aio_context, true);
+ }
+ return data.ret;
} else {
return -ENOTSUP;
}
}
-static int coroutine_fn vmdk_co_write_zeroes(BlockDriverState *bs,
- int64_t sector_num,
- int nb_sectors,
- BdrvRequestFlags flags)
+static int coroutine_fn vmdk_co_pwrite_zeroes(BlockDriverState *bs,
+ int64_t offset,
+ int 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_write(bs, sector_num, NULL, nb_sectors, true, true);
+ ret = vmdk_pwritev(bs, offset, bytes, NULL, true, true);
if (!ret) {
- ret = vmdk_write(bs, sector_num, NULL, nb_sectors, true, false);
+ ret = vmdk_pwritev(bs, offset, bytes, NULL, true, false);
}
qemu_co_mutex_unlock(&s->lock);
return ret;
QemuOpts *opts, Error **errp)
{
int ret, i;
- BlockDriverState *bs = NULL;
+ BlockBackend *blk = NULL;
VMDK4Header header;
Error *local_err = NULL;
uint32_t tmp, magic, grains, gd_sectors, gt_size, gt_count;
goto exit;
}
- assert(bs == NULL);
- ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
- &local_err);
- if (ret < 0) {
+ blk = blk_new_open(filename, NULL, NULL,
+ BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
+ if (blk == NULL) {
error_propagate(errp, local_err);
+ ret = -EIO;
goto exit;
}
+ blk_set_allow_write_beyond_eof(blk, true);
+
if (flat) {
- ret = bdrv_truncate(bs, filesize);
+ ret = blk_truncate(blk, filesize);
if (ret < 0) {
error_setg_errno(errp, -ret, "Could not truncate file");
}
}
magic = cpu_to_be32(VMDK4_MAGIC);
memset(&header, 0, sizeof(header));
- header.version = zeroed_grain ? 2 : 1;
+ 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.check_bytes[3] = 0xa;
/* write all the data */
- ret = bdrv_pwrite(bs, 0, &magic, sizeof(magic));
+ ret = blk_pwrite(blk, 0, &magic, sizeof(magic), 0);
if (ret < 0) {
error_setg(errp, QERR_IO_ERROR);
goto exit;
}
- ret = bdrv_pwrite(bs, sizeof(magic), &header, sizeof(header));
+ ret = blk_pwrite(blk, sizeof(magic), &header, sizeof(header), 0);
if (ret < 0) {
error_setg(errp, QERR_IO_ERROR);
goto exit;
}
- ret = bdrv_truncate(bs, le64_to_cpu(header.grain_offset) << 9);
+ ret = blk_truncate(blk, le64_to_cpu(header.grain_offset) << 9);
if (ret < 0) {
error_setg_errno(errp, -ret, "Could not truncate file");
goto exit;
i < gt_count; i++, tmp += gt_size) {
gd_buf[i] = cpu_to_le32(tmp);
}
- ret = bdrv_pwrite(bs, le64_to_cpu(header.rgd_offset) * BDRV_SECTOR_SIZE,
- gd_buf, gd_buf_size);
+ ret = blk_pwrite(blk, le64_to_cpu(header.rgd_offset) * BDRV_SECTOR_SIZE,
+ gd_buf, gd_buf_size, 0);
if (ret < 0) {
error_setg(errp, QERR_IO_ERROR);
goto exit;
i < gt_count; i++, tmp += gt_size) {
gd_buf[i] = cpu_to_le32(tmp);
}
- ret = bdrv_pwrite(bs, le64_to_cpu(header.gd_offset) * BDRV_SECTOR_SIZE,
- gd_buf, gd_buf_size);
+ ret = blk_pwrite(blk, le64_to_cpu(header.gd_offset) * BDRV_SECTOR_SIZE,
+ gd_buf, gd_buf_size, 0);
if (ret < 0) {
error_setg(errp, QERR_IO_ERROR);
goto exit;
ret = 0;
exit:
- if (bs) {
- bdrv_unref(bs);
+ if (blk) {
+ blk_unref(blk);
}
g_free(gd_buf);
return ret;
static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp)
{
int idx = 0;
- BlockDriverState *new_bs = NULL;
+ BlockBackend *new_blk = NULL;
Error *local_err = NULL;
char *desc = NULL;
int64_t total_size = 0, filesize;
char *adapter_type = NULL;
char *backing_file = NULL;
+ char *hw_version = NULL;
char *fmt = NULL;
- int flags = 0;
int ret = 0;
bool flat, split, compress;
GString *ext_desc_lines;
"# The Disk Data Base\n"
"#DDB\n"
"\n"
- "ddb.virtualHWVersion = \"%d\"\n"
+ "ddb.virtualHWVersion = \"%s\"\n"
"ddb.geometry.cylinders = \"%" PRId64 "\"\n"
"ddb.geometry.heads = \"%" PRIu32 "\"\n"
"ddb.geometry.sectors = \"63\"\n"
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);
if (qemu_opt_get_bool_del(opts, BLOCK_OPT_COMPAT6, false)) {
- flags |= BLOCK_FLAG_COMPAT6;
+ if (strcmp(hw_version, "undefined")) {
+ error_setg(errp,
+ "compat6 cannot be enabled with hwversion set");
+ ret = -EINVAL;
+ goto exit;
+ }
+ g_free(hw_version);
+ hw_version = g_strdup("6");
+ }
+ if (strcmp(hw_version, "undefined") == 0) {
+ g_free(hw_version);
+ hw_version = g_strdup("4");
}
fmt = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT);
if (qemu_opt_get_bool_del(opts, BLOCK_OPT_ZEROED_GRAIN, false)) {
goto exit;
}
if (backing_file) {
- BlockDriverState *bs = NULL;
+ BlockBackend *blk;
char *full_backing = g_new0(char, PATH_MAX);
bdrv_get_full_backing_filename_from_filename(filename, backing_file,
full_backing, PATH_MAX,
ret = -ENOENT;
goto exit;
}
- ret = bdrv_open(&bs, full_backing, NULL, NULL, BDRV_O_NO_BACKING, errp);
+
+ blk = blk_new_open(full_backing, NULL, NULL,
+ BDRV_O_NO_BACKING, errp);
g_free(full_backing);
- if (ret != 0) {
+ if (blk == NULL) {
+ ret = -EIO;
goto exit;
}
- if (strcmp(bs->drv->format_name, "vmdk")) {
- bdrv_unref(bs);
+ if (strcmp(blk_bs(blk)->drv->format_name, "vmdk")) {
+ blk_unref(blk);
ret = -EINVAL;
goto exit;
}
- parent_cid = vmdk_read_cid(bs, 0);
- bdrv_unref(bs);
+ parent_cid = vmdk_read_cid(blk_bs(blk), 0);
+ blk_unref(blk);
snprintf(parent_desc_line, BUF_SIZE,
"parentFileNameHint=\"%s\"", backing_file);
}
fmt,
parent_desc_line,
ext_desc_lines->str,
- (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4),
+ hw_version,
total_size /
(int64_t)(63 * number_heads * BDRV_SECTOR_SIZE),
number_heads,
goto exit;
}
}
- assert(new_bs == NULL);
- ret = bdrv_open(&new_bs, filename, NULL, NULL,
- BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
- if (ret < 0) {
+
+ new_blk = blk_new_open(filename, NULL, NULL,
+ BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
+ if (new_blk == NULL) {
error_propagate(errp, local_err);
+ ret = -EIO;
goto exit;
}
- ret = bdrv_pwrite(new_bs, desc_offset, desc, desc_len);
+
+ blk_set_allow_write_beyond_eof(new_blk, true);
+
+ ret = blk_pwrite(new_blk, desc_offset, desc, desc_len, 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 = bdrv_truncate(new_bs, desc_len);
+ ret = blk_truncate(new_blk, desc_len);
if (ret < 0) {
error_setg_errno(errp, -ret, "Could not truncate file");
}
}
exit:
- if (new_bs) {
- bdrv_unref(new_bs);
+ if (new_blk) {
+ blk_unref(new_blk);
}
g_free(adapter_type);
g_free(backing_file);
+ g_free(hw_version);
g_free(fmt);
g_free(desc);
g_free(path);
ImageInfoList **next;
*spec_info = (ImageInfoSpecific){
- .kind = IMAGE_INFO_SPECIFIC_KIND_VMDK,
- {
- .vmdk = g_new0(ImageInfoSpecificVmdk, 1),
+ .type = IMAGE_INFO_SPECIFIC_KIND_VMDK,
+ .u = {
+ .vmdk.data = g_new0(ImageInfoSpecificVmdk, 1),
},
};
- *spec_info->vmdk = (ImageInfoSpecificVmdk) {
+ *spec_info->u.vmdk.data = (ImageInfoSpecificVmdk) {
.create_type = g_strdup(s->create_type),
.cid = s->cid,
.parent_cid = s->parent_cid,
};
- next = &spec_info->vmdk->extents;
+ next = &spec_info->u.vmdk.data->extents;
for (i = 0; i < s->num_extents; i++) {
*next = g_new0(ImageInfoList, 1);
(*next)->value = vmdk_get_extent_info(&s->extents[i]);
return 0;
}
-static void vmdk_detach_aio_context(BlockDriverState *bs)
-{
- BDRVVmdkState *s = bs->opaque;
- int i;
-
- for (i = 0; i < s->num_extents; i++) {
- bdrv_detach_aio_context(s->extents[i].file->bs);
- }
-}
-
-static void vmdk_attach_aio_context(BlockDriverState *bs,
- AioContext *new_context)
-{
- BDRVVmdkState *s = bs->opaque;
- int i;
-
- for (i = 0; i < s->num_extents; i++) {
- bdrv_attach_aio_context(s->extents[i].file->bs, new_context);
- }
-}
-
static QemuOptsList vmdk_create_opts = {
.name = "vmdk-create-opts",
.head = QTAILQ_HEAD_INITIALIZER(vmdk_create_opts.head),
.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_SUBFMT,
.type = QEMU_OPT_STRING,
.bdrv_open = vmdk_open,
.bdrv_check = vmdk_check,
.bdrv_reopen_prepare = vmdk_reopen_prepare,
- .bdrv_read = vmdk_co_read,
- .bdrv_write = vmdk_co_write,
+ .bdrv_co_preadv = vmdk_co_preadv,
+ .bdrv_co_pwritev = vmdk_co_pwritev,
.bdrv_write_compressed = vmdk_write_compressed,
- .bdrv_co_write_zeroes = vmdk_co_write_zeroes,
+ .bdrv_co_pwrite_zeroes = vmdk_co_pwrite_zeroes,
.bdrv_close = vmdk_close,
.bdrv_create = vmdk_create,
.bdrv_co_flush_to_disk = vmdk_co_flush,
.bdrv_get_specific_info = vmdk_get_specific_info,
.bdrv_refresh_limits = vmdk_refresh_limits,
.bdrv_get_info = vmdk_get_info,
- .bdrv_detach_aio_context = vmdk_detach_aio_context,
- .bdrv_attach_aio_context = vmdk_attach_aio_context,
.supports_backing = true,
.create_opts = &vmdk_create_opts,
projects / qemu.git / blobdiff