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Diffstat (limited to 'block/vhdx.c')
-rw-r--r--block/vhdx.c41
1 files changed, 28 insertions, 13 deletions
diff --git a/block/vhdx.c b/block/vhdx.c
index 12bfe75e51..0776de7174 100644
--- a/block/vhdx.c
+++ b/block/vhdx.c
@@ -1002,9 +1002,9 @@ static int vhdx_open(BlockDriverState *bs, QDict *options, int flags,
/* TODO: differencing files */
/* Disable migration when VHDX images are used */
- error_set(&s->migration_blocker,
- QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED,
- "vhdx", bdrv_get_device_name(bs), "live migration");
+ error_setg(&s->migration_blocker, "The vhdx format used by node '%s' "
+ "does not support live migration",
+ bdrv_get_device_or_node_name(bs));
migrate_add_blocker(s->migration_blocker);
return 0;
@@ -1109,8 +1109,9 @@ static coroutine_fn int vhdx_co_readv(BlockDriverState *bs, int64_t sector_num,
/* check the payload block state */
switch (s->bat[sinfo.bat_idx] & VHDX_BAT_STATE_BIT_MASK) {
case PAYLOAD_BLOCK_NOT_PRESENT: /* fall through */
- case PAYLOAD_BLOCK_UNDEFINED: /* fall through */
- case PAYLOAD_BLOCK_UNMAPPED: /* fall through */
+ case PAYLOAD_BLOCK_UNDEFINED:
+ case PAYLOAD_BLOCK_UNMAPPED:
+ case PAYLOAD_BLOCK_UNMAPPED_v095:
case PAYLOAD_BLOCK_ZERO:
/* return zero */
qemu_iovec_memset(&hd_qiov, 0, 0, sinfo.bytes_avail);
@@ -1173,7 +1174,18 @@ static void vhdx_update_bat_table_entry(BlockDriverState *bs, BDRVVHDXState *s,
{
/* The BAT entry is a uint64, with 44 bits for the file offset in units of
* 1MB, and 3 bits for the block state. */
- s->bat[sinfo->bat_idx] = sinfo->file_offset;
+ if ((state == PAYLOAD_BLOCK_ZERO) ||
+ (state == PAYLOAD_BLOCK_UNDEFINED) ||
+ (state == PAYLOAD_BLOCK_NOT_PRESENT) ||
+ (state == PAYLOAD_BLOCK_UNMAPPED)) {
+ s->bat[sinfo->bat_idx] = 0; /* For PAYLOAD_BLOCK_ZERO, the
+ FileOffsetMB field is denoted as
+ 'reserved' in the v1.0 spec. If it is
+ non-zero, MS Hyper-V will fail to read
+ the disk image */
+ } else {
+ s->bat[sinfo->bat_idx] = sinfo->file_offset;
+ }
s->bat[sinfo->bat_idx] |= state & VHDX_BAT_STATE_BIT_MASK;
@@ -1257,7 +1269,7 @@ static coroutine_fn int vhdx_co_writev(BlockDriverState *bs, int64_t sector_num,
iov1.iov_base = qemu_blockalign(bs, iov1.iov_len);
memset(iov1.iov_base, 0, iov1.iov_len);
qemu_iovec_concat_iov(&hd_qiov, &iov1, 1, 0,
- sinfo.block_offset);
+ iov1.iov_len);
sectors_to_write += iov1.iov_len >> BDRV_SECTOR_BITS;
}
@@ -1273,15 +1285,15 @@ static coroutine_fn int vhdx_co_writev(BlockDriverState *bs, int64_t sector_num,
iov2.iov_base = qemu_blockalign(bs, iov2.iov_len);
memset(iov2.iov_base, 0, iov2.iov_len);
qemu_iovec_concat_iov(&hd_qiov, &iov2, 1, 0,
- sinfo.block_offset);
+ iov2.iov_len);
sectors_to_write += iov2.iov_len >> BDRV_SECTOR_BITS;
}
}
-
/* fall through */
case PAYLOAD_BLOCK_NOT_PRESENT: /* fall through */
- case PAYLOAD_BLOCK_UNMAPPED: /* fall through */
- case PAYLOAD_BLOCK_UNDEFINED: /* fall through */
+ case PAYLOAD_BLOCK_UNMAPPED:
+ case PAYLOAD_BLOCK_UNMAPPED_v095:
+ case PAYLOAD_BLOCK_UNDEFINED:
bat_prior_offset = sinfo.file_offset;
ret = vhdx_allocate_block(bs, s, &sinfo.file_offset);
if (ret < 0) {
@@ -1773,7 +1785,7 @@ static int vhdx_create(const char *filename, QemuOpts *opts, Error **errp)
log_size = qemu_opt_get_size_del(opts, VHDX_BLOCK_OPT_LOG_SIZE, 0);
block_size = qemu_opt_get_size_del(opts, VHDX_BLOCK_OPT_BLOCK_SIZE, 0);
type = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT);
- use_zero_blocks = qemu_opt_get_bool_del(opts, VHDX_BLOCK_OPT_ZERO, false);
+ use_zero_blocks = qemu_opt_get_bool_del(opts, VHDX_BLOCK_OPT_ZERO, true);
if (image_size > VHDX_MAX_IMAGE_SIZE) {
error_setg_errno(errp, EINVAL, "Image size too large; max of 64TB");
@@ -1935,7 +1947,9 @@ static QemuOptsList vhdx_create_opts = {
{
.name = VHDX_BLOCK_OPT_ZERO,
.type = QEMU_OPT_BOOL,
- .help = "Force use of payload blocks of type 'ZERO'. Non-standard."
+ .help = "Force use of payload blocks of type 'ZERO'. "\
+ "Non-standard, but default. Do not set to 'off' when "\
+ "using 'qemu-img convert' with subformat=dynamic."
},
{ NULL }
}
@@ -1953,6 +1967,7 @@ static BlockDriver bdrv_vhdx = {
.bdrv_create = vhdx_create,
.bdrv_get_info = vhdx_get_info,
.bdrv_check = vhdx_check,
+ .bdrv_has_zero_init = bdrv_has_zero_init_1,
.create_opts = &vhdx_create_opts,
};