*/
#include "qemu-common.h"
-#include "block_int.h"
-#include "module.h"
-#include "zlib.h"
+#include "block/block_int.h"
+#include "qemu/module.h"
+#include "migration/migration.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_FLAG_RGD (1 << 1)
#define VMDK4_FLAG_COMPRESS (1 << 16)
#define VMDK4_FLAG_MARKER (1 << 17)
+#define VMDK4_GD_AT_END 0xffffffffffffffffULL
typedef struct {
uint32_t version;
int64_t desc_offset;
int64_t desc_size;
int32_t num_gtes_per_gte;
- int64_t gd_offset;
int64_t rgd_offset;
+ int64_t gd_offset;
int64_t grain_offset;
char filler[1];
char check_bytes[4];
int num_extents;
/* Extent array with num_extents entries, ascend ordered by address */
VmdkExtent *extents;
+ Error *migration_blocker;
} BDRVVmdkState;
typedef struct VmdkMetaData {
uint8_t data[0];
} 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;
return 1;
}
+/* Queue extents, if any, for reopen() */
+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_set(errp, ERROR_CLASS_GENERIC_ERROR,
+ "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;
+}
+
static int vmdk_parent_open(BlockDriverState *bs)
{
char *p_name;
if (header.capacity == 0 && header.desc_offset) {
return vmdk_open_desc_file(bs, flags, header.desc_offset << 9);
}
+
+ 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->total_sectors * 512 - 1536,
+ &footer, sizeof(footer));
+ if (ret < 0) {
+ 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)
+ {
+ return -EINVAL;
+ }
+
+ header = footer.header;
+ }
+
l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gte)
* le64_to_cpu(header.granularity);
- if (l1_entry_sectors <= 0) {
+ if (l1_entry_sectors == 0) {
return -EINVAL;
}
l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1)
}
s->parent_cid = vmdk_read_cid(bs, 1);
qemu_co_mutex_init(&s->lock);
- return ret;
+
+ /* Disable migration when VMDK images are used */
+ error_set(&s->migration_blocker,
+ QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED,
+ "vmdk", bs->device_name, "live migration");
+ migrate_add_blocker(s->migration_blocker);
+
+ return 0;
fail:
vmdk_free_extents(bs);
return NULL;
}
-static int vmdk_is_allocated(BlockDriverState *bs, int64_t sector_num,
- int nb_sectors, int *pnum)
+static int coroutine_fn vmdk_co_is_allocated(BlockDriverState *bs,
+ int64_t sector_num, int nb_sectors, int *pnum)
{
BDRVVmdkState *s = bs->opaque;
int64_t index_in_cluster, n, ret;
if (!extent) {
return 0;
}
+ qemu_co_mutex_lock(&s->lock);
ret = get_cluster_offset(bs, extent, NULL,
sector_num * 512, 0, &offset);
+ qemu_co_mutex_unlock(&s->lock);
/* get_cluster_offset returning 0 means success */
ret = !ret;
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, 0, &cluster_offset);
- index_in_cluster = sector_num % extent->cluster_sectors;
+ 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;
n = extent->cluster_sectors - index_in_cluster;
if (n > nb_sectors) {
n = nb_sectors;
VmdkExtent *extent = NULL;
int n, ret;
int64_t index_in_cluster;
+ uint64_t extent_begin_sector, extent_relative_sector_num;
uint64_t cluster_offset;
VmdkMetaData m_data;
if (ret) {
return -EINVAL;
}
- index_in_cluster = sector_num % extent->cluster_sectors;
+ 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;
n = extent->cluster_sectors - index_in_cluster;
if (n > nb_sectors) {
n = nb_sectors;
VMDK4Header header;
uint32_t tmp, magic, grains, gd_size, gt_size, gt_count;
- fd = open(
- filename,
- O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE,
- 0644);
+ fd = qemu_open(filename,
+ O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE,
+ 0644);
if (fd < 0) {
return -errno;
}
ret = 0;
exit:
- close(fd);
+ qemu_close(fd);
return ret;
}
return -1;
}
if (path_is_absolute(target)) {
- dest[dest_size - 1] = '\0';
- strncpy(dest, target, dest_size - 1);
+ pstrcpy(dest, dest_size, target);
return 0;
}
while (base[i] == target[i]) {
(flags & BLOCK_FLAG_COMPAT6 ? 6 : 4),
total_size / (int64_t)(63 * 16 * 512));
if (split || flat) {
- fd = open(
- filename,
- O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE,
- 0644);
+ fd = qemu_open(filename,
+ O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE,
+ 0644);
} else {
- fd = open(
- filename,
- O_WRONLY | O_BINARY | O_LARGEFILE,
- 0644);
+ fd = qemu_open(filename,
+ O_WRONLY | O_BINARY | O_LARGEFILE,
+ 0644);
}
if (fd < 0) {
return -errno;
}
ret = 0;
exit:
- close(fd);
+ qemu_close(fd);
return ret;
}
static void vmdk_close(BlockDriverState *bs)
{
+ BDRVVmdkState *s = bs->opaque;
+
vmdk_free_extents(bs);
+
+ migrate_del_blocker(s->migration_blocker);
+ error_free(s->migration_blocker);
}
static coroutine_fn int vmdk_co_flush(BlockDriverState *bs)
{
- int i, ret, err;
BDRVVmdkState *s = bs->opaque;
+ int i, err;
+ int ret = 0;
- ret = bdrv_co_flush(bs->file);
for (i = 0; i < s->num_extents; i++) {
err = bdrv_co_flush(s->extents[i].file);
if (err < 0) {
.instance_size = sizeof(BDRVVmdkState),
.bdrv_probe = vmdk_probe,
.bdrv_open = vmdk_open,
+ .bdrv_reopen_prepare = vmdk_reopen_prepare,
.bdrv_read = vmdk_co_read,
.bdrv_write = vmdk_co_write,
.bdrv_close = vmdk_close,
.bdrv_create = vmdk_create,
- .bdrv_co_flush = vmdk_co_flush,
- .bdrv_is_allocated = vmdk_is_allocated,
+ .bdrv_co_flush_to_disk = vmdk_co_flush,
+ .bdrv_co_is_allocated = vmdk_co_is_allocated,
.bdrv_get_allocated_file_size = vmdk_get_allocated_file_size,
.create_options = vmdk_create_options,
projects / qemu.git / blobdiff