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vmdk: Implement .bdrv_get_info() 

This will return cluster_size and needs_compressed_writes to caller, if all the
extents have the same value (or there's only one extent). Otherwise return
-ENOTSUP.

cluster_size is only reported for sparse formats.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Fam Zheng 2014-05-06 21:08:45 +08:00 committed by Stefan Hajnoczi
parent ba0ad89e2c
commit 74fe188cd1
2 changed files with 22 additions and 0 deletions
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21
block/vmdk.c
View File

@ -2076,6 +2076,26 @@ static ImageInfoSpecific *vmdk_get_specific_info(BlockDriverState *bs)
return spec_info;
}
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)) {
return -ENOTSUP;
}
}
return 0;
}
static QEMUOptionParameter vmdk_create_options[] = {
{
.name = BLOCK_OPT_SIZE,
@ -2132,6 +2152,7 @@ static BlockDriver bdrv_vmdk = {
.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,
.create_options = vmdk_create_options,
};

1
tests/qemu-iotests/059.out
View File

@ -2050,6 +2050,7 @@ qemu-img: Could not open 'TEST_DIR/t.IMGFMT': File truncated, expecting at least
image: TEST_DIR/iotest-version3.IMGFMT
file format: IMGFMT
virtual size: 1.0G (1073741824 bytes)
cluster_size: 65536
=== Testing 4TB monolithicFlat creation and IO ===
Formatting 'TEST_DIR/iotest-version3.IMGFMT', fmt=IMGFMT size=4398046511104