#include "qemu-common.h"
#include "block/block_int.h"
+#include "qemu/error-report.h"
#include "qemu/module.h"
#include "migration/migration.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')
return 1;
}
-/* Queue extents, if any, for reopen() */
+/* We have nothing to do for VMDK reopen, stubs just return success */
static int vmdk_reopen_prepare(BDRVReopenState *state,
BlockReopenQueue *queue, Error **errp)
{
- BDRVVmdkState *s;
- int ret = -1;
- int i;
- VmdkExtent *e;
-
assert(state != NULL);
assert(state->bs != NULL);
-
- if (queue == NULL) {
- error_setg(errp, "No reopen queue for VMDK extents");
- goto exit;
- }
-
- s = state->bs->opaque;
-
- assert(s != NULL);
-
- for (i = 0; i < s->num_extents; i++) {
- e = &s->extents[i];
- if (e->file != state->bs->file) {
- bdrv_reopen_queue(queue, e->file, state->flags);
- }
- }
- ret = 0;
-
-exit:
- return ret;
+ return 0;
}
static int vmdk_parent_open(BlockDriverState *bs)
Error **errp)
{
int ret;
- int l1_size, i;
+ size_t l1_size;
+ int i;
/* read the L1 table */
l1_size = extent->l1_size * sizeof(uint32_t);
}
ret = vmdk_add_extent(bs, file, false,
le32_to_cpu(header.disk_sectors),
- le32_to_cpu(header.l1dir_offset) << 9,
+ (int64_t)le32_to_cpu(header.l1dir_offset) << 9,
0,
le32_to_cpu(header.l1dir_size),
4096,
}
static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf,
- Error **errp);
+ QDict *options, Error **errp);
static char *vmdk_read_desc(BlockDriverState *file, uint64_t desc_offset,
Error **errp)
return NULL;
}
- size = MIN(size, 1 << 20); /* avoid unbounded allocation */
- buf = g_malloc0(size + 1);
+ 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, buf, size);
if (ret < 0) {
g_free(buf);
return NULL;
}
+ buf[ret] = 0;
return buf;
}
static int vmdk_open_vmdk4(BlockDriverState *bs,
BlockDriverState *file,
- int flags, Error **errp)
+ int flags, QDict *options, Error **errp)
{
int ret;
uint32_t magic;
if (!buf) {
return -EINVAL;
}
- ret = vmdk_open_desc_file(bs, flags, buf, errp);
+ ret = vmdk_open_desc_file(bs, flags, buf, options, errp);
g_free(buf);
return ret;
}
bs->file->total_sectors * 512 - 1536,
&footer, sizeof(footer));
if (ret < 0) {
+ error_setg_errno(errp, -ret, "Failed to read footer");
return ret;
}
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;
}
char buf[64];
snprintf(buf, sizeof(buf), "VMDK version %" PRId32,
le32_to_cpu(header.version));
- error_set(errp, QERR_UNKNOWN_BLOCK_FORMAT_FEATURE,
- bs->device_name, "vmdk", buf);
+ error_setg(errp, QERR_UNKNOWN_BLOCK_FORMAT_FEATURE,
+ bdrv_get_device_or_node_name(bs), "vmdk", buf);
return -ENOTSUP;
} else if (le32_to_cpu(header.version) == 3 && (flags & BDRV_O_RDWR)) {
/* VMware KB 2064959 explains that version 3 added support for
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)
/* Open an extent file and append to bs array */
static int vmdk_open_sparse(BlockDriverState *bs,
BlockDriverState *file, int flags,
- char *buf, Error **errp)
+ char *buf, QDict *options, Error **errp)
{
uint32_t magic;
return vmdk_open_vmfs_sparse(bs, file, flags, errp);
break;
case VMDK4_MAGIC:
- return vmdk_open_vmdk4(bs, file, flags, errp);
+ return vmdk_open_vmdk4(bs, file, flags, options, errp);
break;
default:
error_setg(errp, "Image not in VMDK format");
}
static int vmdk_parse_extents(const char *desc, BlockDriverState *bs,
- const char *desc_file_path, Error **errp)
+ const char *desc_file_path, QDict *options,
+ Error **errp)
{
int ret;
+ int matches;
char access[11];
char type[11];
char fname[512];
const char *p = desc;
int64_t sectors = 0;
int64_t flat_offset;
- char extent_path[PATH_MAX];
+ char *extent_path;
BlockDriverState *extent_file;
BDRVVmdkState *s = bs->opaque;
VmdkExtent *extent;
+ char extent_opt_prefix[32];
while (*p) {
- /* parse extent line:
+ /* parse extent line in one of below formats:
+ *
* RW [size in sectors] FLAT "file-name.vmdk" OFFSET
- * or
* RW [size in sectors] SPARSE "file-name.vmdk"
+ * RW [size in sectors] VMFS "file-name.vmdk"
+ * RW [size in sectors] VMFSSPARSE "file-name.vmdk"
*/
flat_offset = -1;
- ret = sscanf(p, "%10s %" SCNd64 " %10s \"%511[^\n\r\"]\" %" SCNd64,
- access, §ors, type, fname, &flat_offset);
- if (ret < 4 || strcmp(access, "RW")) {
+ 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;
} else if (!strcmp(type, "FLAT")) {
- if (ret != 5 || flat_offset < 0) {
+ if (matches != 5 || flat_offset < 0) {
error_setg(errp, "Invalid extent lines: \n%s", p);
return -EINVAL;
}
} else if (!strcmp(type, "VMFS")) {
- if (ret == 4) {
+ if (matches == 4) {
flat_offset = 0;
} else {
error_setg(errp, "Invalid extent lines:\n%s", p);
return -EINVAL;
}
- } else if (ret != 4) {
+ } else if (matches != 4) {
error_setg(errp, "Invalid extent lines:\n%s", p);
return -EINVAL;
}
goto next_line;
}
- path_combine(extent_path, sizeof(extent_path),
- desc_file_path, fname);
+ if (!path_is_absolute(fname) && !path_has_protocol(fname) &&
+ !desc_file_path[0])
+ {
+ error_setg(errp, "Cannot use relative extent paths with VMDK "
+ "descriptor file '%s'", bs->file->filename);
+ return -EINVAL;
+ }
+
+ extent_path = g_malloc0(PATH_MAX);
+ path_combine(extent_path, PATH_MAX, desc_file_path, fname);
extent_file = NULL;
- ret = bdrv_open(&extent_file, extent_path, NULL, NULL,
- bs->open_flags | BDRV_O_PROTOCOL, NULL, errp);
+
+ ret = snprintf(extent_opt_prefix, 32, "extents.%d", s->num_extents);
+ assert(ret < 32);
+
+ ret = bdrv_open_image(&extent_file, extent_path, options,
+ extent_opt_prefix, bs, &child_file, false, errp);
+ g_free(extent_path);
if (ret) {
return ret;
}
if (!buf) {
ret = -EINVAL;
} else {
- ret = vmdk_open_sparse(bs, extent_file, bs->open_flags, buf, errp);
+ ret = vmdk_open_sparse(bs, extent_file, bs->open_flags, buf,
+ options, errp);
}
g_free(buf);
if (ret) {
}
static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf,
- Error **errp)
+ QDict *options, Error **errp)
{
int ret;
char ct[128];
}
s->create_type = g_strdup(ct);
s->desc_offset = 0;
- ret = vmdk_parse_extents(buf, bs, bs->file->filename, errp);
+ ret = vmdk_parse_extents(buf, bs, bs->file->exact_filename, options, errp);
exit:
return ret;
}
static int vmdk_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
- char *buf = NULL;
+ char *buf;
int ret;
BDRVVmdkState *s = bs->opaque;
uint32_t magic;
switch (magic) {
case VMDK3_MAGIC:
case VMDK4_MAGIC:
- ret = vmdk_open_sparse(bs, bs->file, flags, buf, errp);
+ ret = vmdk_open_sparse(bs, bs->file, flags, buf, options, errp);
s->desc_offset = 0x200;
break;
default:
- ret = vmdk_open_desc_file(bs, flags, buf, errp);
+ ret = vmdk_open_desc_file(bs, flags, buf, options, errp);
break;
}
if (ret) {
qemu_co_mutex_init(&s->lock);
/* Disable migration when VMDK images are used */
- error_set(&s->migration_blocker,
- QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED,
- "vmdk", bs->device_name, "live migration");
+ error_setg(&s->migration_blocker, "The vmdk format used by node '%s' "
+ "does not support live migration",
+ bdrv_get_device_or_node_name(bs));
migrate_add_blocker(s->migration_blocker);
g_free(buf);
return 0;
uint32_t min_count, *l2_table;
bool zeroed = false;
int64_t ret;
- int32_t cluster_sector;
+ int64_t cluster_sector;
if (m_data) {
m_data->valid = 0;
return NULL;
}
+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;
+}
+
static int64_t coroutine_fn vmdk_co_get_block_status(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *pnum)
{
break;
}
- index_in_cluster = sector_num % extent->cluster_sectors;
+ 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;
uLongf buf_len;
const uint8_t *write_buf = buf;
int write_len = nb_sectors * 512;
+ int64_t write_offset;
+ int64_t write_end_sector;
if (extent->compressed) {
if (!extent->has_marker) {
write_buf = (uint8_t *)data;
write_len = buf_len + sizeof(VmdkGrainMarker);
}
- ret = bdrv_pwrite(extent->file,
- cluster_offset + offset_in_cluster,
- write_buf,
- write_len);
+ write_offset = cluster_offset + offset_in_cluster,
+ ret = bdrv_pwrite(extent->file, write_offset, write_buf, write_len);
+
+ write_end_sector = DIV_ROUND_UP(write_offset + write_len, BDRV_SECTOR_SIZE);
+
+ extent->next_cluster_sector = MAX(extent->next_cluster_sector,
+ write_end_sector);
+
if (ret != write_len) {
ret = ret < 0 ? ret : -EIO;
goto out;
BDRVVmdkState *s = bs->opaque;
int ret;
uint64_t n, index_in_cluster;
- uint64_t extent_begin_sector, extent_relative_sector_num;
VmdkExtent *extent = NULL;
uint64_t cluster_offset;
ret = get_cluster_offset(bs, extent, NULL,
sector_num << 9, false, &cluster_offset,
0, 0);
- 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;
+ 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;
VmdkExtent *extent = NULL;
int ret;
int64_t index_in_cluster, n;
- uint64_t extent_begin_sector, extent_relative_sector_num;
uint64_t cluster_offset;
VmdkMetaData m_data;
if (!extent) {
return -EIO;
}
- 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;
+ 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;
/* update CID on the first write every time the virtual disk is
* opened */
if (!s->cid_updated) {
- ret = vmdk_write_cid(bs, time(NULL));
+ ret = vmdk_write_cid(bs, g_random_int());
if (ret < 0) {
return ret;
}
/* write all the data */
ret = bdrv_pwrite(bs, 0, &magic, sizeof(magic));
if (ret < 0) {
- error_set(errp, QERR_IO_ERROR);
+ error_setg(errp, QERR_IO_ERROR);
goto exit;
}
ret = bdrv_pwrite(bs, sizeof(magic), &header, sizeof(header));
if (ret < 0) {
- error_set(errp, QERR_IO_ERROR);
+ error_setg(errp, QERR_IO_ERROR);
goto exit;
}
ret = bdrv_pwrite(bs, le64_to_cpu(header.rgd_offset) * BDRV_SECTOR_SIZE,
gd_buf, gd_buf_size);
if (ret < 0) {
- error_set(errp, QERR_IO_ERROR);
+ error_setg(errp, QERR_IO_ERROR);
goto exit;
}
ret = bdrv_pwrite(bs, le64_to_cpu(header.gd_offset) * BDRV_SECTOR_SIZE,
gd_buf, gd_buf_size);
if (ret < 0) {
- error_set(errp, QERR_IO_ERROR);
+ error_setg(errp, QERR_IO_ERROR);
goto exit;
}
int ret = 0;
bool flat, split, compress;
GString *ext_desc_lines;
- char path[PATH_MAX], prefix[PATH_MAX], postfix[PATH_MAX];
+ 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);
const int64_t split_size = 0x80000000; /* VMDK has constant split size */
const char *desc_extent_line;
- char parent_desc_line[BUF_SIZE] = "";
+ char *parent_desc_line = g_malloc0(BUF_SIZE);
uint32_t parent_cid = 0xffffffff;
uint32_t number_heads = 16;
bool zeroed_grain = false;
}
if (backing_file) {
BlockDriverState *bs = NULL;
- ret = bdrv_open(&bs, backing_file, NULL, NULL, BDRV_O_NO_BACKING, NULL,
+ char *full_backing = g_new0(char, PATH_MAX);
+ bdrv_get_full_backing_filename_from_filename(filename, backing_file,
+ full_backing, PATH_MAX,
+ &local_err);
+ if (local_err) {
+ g_free(full_backing);
+ error_propagate(errp, local_err);
+ ret = -ENOENT;
+ goto exit;
+ }
+ ret = bdrv_open(&bs, full_backing, NULL, NULL, BDRV_O_NO_BACKING, NULL,
errp);
+ g_free(full_backing);
if (ret != 0) {
goto exit;
}
}
parent_cid = vmdk_read_cid(bs, 0);
bdrv_unref(bs);
- snprintf(parent_desc_line, sizeof(parent_desc_line),
+ snprintf(parent_desc_line, BUF_SIZE,
"parentFileNameHint=\"%s\"", backing_file);
}
/* Create extents */
filesize = total_size;
while (filesize > 0) {
- char desc_line[BUF_SIZE];
- char ext_filename[PATH_MAX];
- char desc_filename[PATH_MAX];
int64_t size = filesize;
if (split && size > split_size) {
size = split_size;
}
if (split) {
- snprintf(desc_filename, sizeof(desc_filename), "%s-%c%03d%s",
+ snprintf(desc_filename, PATH_MAX, "%s-%c%03d%s",
prefix, flat ? 'f' : 's', ++idx, postfix);
} else if (flat) {
- snprintf(desc_filename, sizeof(desc_filename), "%s-flat%s",
- prefix, postfix);
+ snprintf(desc_filename, PATH_MAX, "%s-flat%s", prefix, postfix);
} else {
- snprintf(desc_filename, sizeof(desc_filename), "%s%s",
- prefix, postfix);
+ snprintf(desc_filename, PATH_MAX, "%s%s", prefix, postfix);
}
- snprintf(ext_filename, sizeof(ext_filename), "%s%s",
- path, desc_filename);
+ snprintf(ext_filename, PATH_MAX, "%s%s", path, desc_filename);
if (vmdk_create_extent(ext_filename, size,
flat, compress, zeroed_grain, opts, errp)) {
filesize -= size;
/* Format description line */
- snprintf(desc_line, sizeof(desc_line),
+ snprintf(desc_line, BUF_SIZE,
desc_extent_line, size / BDRV_SECTOR_SIZE, desc_filename);
g_string_append(ext_desc_lines, desc_line);
}
/* generate descriptor file */
desc = g_strdup_printf(desc_template,
- (uint32_t)time(NULL),
+ g_random_int(),
parent_cid,
fmt,
parent_desc_line,
g_free(backing_file);
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);
g_string_free(ext_desc_lines, true);
return ret;
}
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);
- bdi->needs_compressed_writes = s->extents[0].compressed;
- if (!s->extents[0].flat) {
- bdi->cluster_size = s->extents[0].cluster_sectors << BDRV_SECTOR_BITS;
- }
+
/* See if we have multiple extents but they have different cases */
for (i = 1; i < s->num_extents; i++) {
- if (bdi->needs_compressed_writes != s->extents[i].compressed ||
- (bdi->cluster_size && bdi->cluster_size !=
- s->extents[i].cluster_sectors << BDRV_SECTOR_BITS)) {
+ 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;
}
projects / mirror_qemu.git / blobdiff