diff options
Diffstat (limited to 'include/block')
| -rw-r--r-- | include/block/block.h | 20 | ||||
| -rw-r--r-- | include/block/block_int.h | 12 |
2 files changed, 19 insertions, 13 deletions
diff --git a/include/block/block.h b/include/block/block.h index b4a77e6cff..59d9f12ce4 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -287,16 +287,16 @@ int bdrv_amend_options(BlockDriverState *bs_new, QEMUOptionParameter *options); /* external snapshots */ typedef enum { - EXT_SNAPSHOT_ALLOWED, - EXT_SNAPSHOT_FORBIDDEN, -} ExtSnapshotPerm; - -/* return EXT_SNAPSHOT_ALLOWED if external snapshot is allowed - * return EXT_SNAPSHOT_FORBIDDEN if external snapshot is forbidden - */ -ExtSnapshotPerm bdrv_check_ext_snapshot(BlockDriverState *bs); -/* helper used to forbid external snapshots like in blkverify */ -ExtSnapshotPerm bdrv_check_ext_snapshot_forbidden(BlockDriverState *bs); + BS_IS_A_FILTER, + BS_FILTER_PASS_DOWN, + BS_AUTHORIZATION_COUNT, +} BsAuthorization; + +bool bdrv_generic_is_first_non_filter(BlockDriverState *bs, + BlockDriverState *candidate); +bool bdrv_recurse_is_first_non_filter(BlockDriverState *bs, + BlockDriverState *candidate); +bool bdrv_is_first_non_filter(BlockDriverState *candidate); /* async block I/O */ typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector, diff --git a/include/block/block_int.h b/include/block/block_int.h index f3f518c4d2..611a955712 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -69,10 +69,16 @@ struct BlockDriver { const char *format_name; int instance_size; - /* if not defined external snapshots are allowed - * future block filters will query their children to build the response + /* this table of boolean contains authorizations for the block operations */ + bool authorizations[BS_AUTHORIZATION_COUNT]; + /* for snapshots complex block filter like Quorum can implement the + * following recursive callback instead of BS_IS_A_FILTER. + * It's purpose is to recurse on the filter children while calling + * bdrv_recurse_is_first_non_filter on them. + * For a sample implementation look in the future Quorum block filter. */ - ExtSnapshotPerm (*bdrv_check_ext_snapshot)(BlockDriverState *bs); + bool (*bdrv_recurse_is_first_non_filter)(BlockDriverState *bs, + BlockDriverState *candidate); int (*bdrv_probe)(const uint8_t *buf, int buf_size, const char *filename); int (*bdrv_probe_device)(const char *filename); |