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block: Add bdrv_get_specific_info

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Add a function for retrieving an ImageInfoSpecific object from a block
driver.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz 2013-10-09 10:46:16 +02:00 committed by Kevin Wolf
parent f2bb8a8a47
commit eae041fe6f
4 changed files with 14 additions and 0 deletions
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9
block.c
View File

@ -3322,6 +3322,15 @@ int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
return drv->bdrv_get_info(bs, bdi);
}
ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs)
{
BlockDriver *drv = bs->drv;
if (drv && drv->bdrv_get_specific_info) {
return drv->bdrv_get_specific_info(bs);
}
return NULL;
}
int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf,
int64_t pos, int size)
{

3
block/qapi.c
View File

@ -134,6 +134,9 @@ void bdrv_query_image_info(BlockDriverState *bs,
info->dirty_flag = bdi.is_dirty;
info->has_dirty_flag = true;
}
info->format_specific = bdrv_get_specific_info(bs);
info->has_format_specific = info->format_specific != NULL;
backing_filename = bs->backing_file;
if (backing_filename[0] != '\0') {
info->backing_filename = g_strdup(backing_filename);

1
include/block/block.h
View File

@ -335,6 +335,7 @@ int bdrv_get_flags(BlockDriverState *bs);
int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors);
int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi);
ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs);
void bdrv_round_to_clusters(BlockDriverState *bs,
int64_t sector_num, int nb_sectors,
int64_t *cluster_sector_num,

1
include/block/block_int.h
View File

@ -168,6 +168,7 @@ struct BlockDriver {
int (*bdrv_snapshot_load_tmp)(BlockDriverState *bs,
const char *snapshot_name);
int (*bdrv_get_info)(BlockDriverState *bs, BlockDriverInfo *bdi);
ImageInfoSpecific *(*bdrv_get_specific_info)(BlockDriverState *bs);
int (*bdrv_save_vmstate)(BlockDriverState *bs, QEMUIOVector *qiov,
int64_t pos);