diff options
| -rw-r--r-- | block.c | 32 | ||||
| -rw-r--r-- | include/block/block_int.h | 11 |
2 files changed, 43 insertions, 0 deletions
@@ -2596,6 +2596,13 @@ void bdrv_format_default_perms(BlockDriverState *bs, BdrvChild *c, uint64_t *nperm, uint64_t *nshared) { bool backing = (child_class == &child_backing); + + if (child_class == &child_of_bds) { + bdrv_default_perms(bs, c, child_class, role, reopen_queue, + perm, shared, nperm, nshared); + return; + } + assert(child_class == &child_backing || child_class == &child_file); if (!backing) { @@ -2607,6 +2614,31 @@ void bdrv_format_default_perms(BlockDriverState *bs, BdrvChild *c, } } +void bdrv_default_perms(BlockDriverState *bs, BdrvChild *c, + const BdrvChildClass *child_class, BdrvChildRole role, + BlockReopenQueue *reopen_queue, + uint64_t perm, uint64_t shared, + uint64_t *nperm, uint64_t *nshared) +{ + assert(child_class == &child_of_bds); + + if (role & BDRV_CHILD_FILTERED) { + assert(!(role & (BDRV_CHILD_DATA | BDRV_CHILD_METADATA | + BDRV_CHILD_COW))); + bdrv_filter_default_perms(bs, c, child_class, role, reopen_queue, + perm, shared, nperm, nshared); + } else if (role & BDRV_CHILD_COW) { + assert(!(role & (BDRV_CHILD_DATA | BDRV_CHILD_METADATA))); + bdrv_default_perms_for_cow(bs, c, child_class, role, reopen_queue, + perm, shared, nperm, nshared); + } else if (role & (BDRV_CHILD_METADATA | BDRV_CHILD_DATA)) { + bdrv_default_perms_for_storage(bs, c, child_class, role, reopen_queue, + perm, shared, nperm, nshared); + } else { + g_assert_not_reached(); + } +} + uint64_t bdrv_qapi_perm_to_blk_perm(BlockPermission qapi_perm) { static const uint64_t permissions[] = { diff --git a/include/block/block_int.h b/include/block/block_int.h index 54df821d61..3a9dda9be7 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -1289,6 +1289,17 @@ bool bdrv_recurse_can_replace(BlockDriverState *bs, BlockDriverState *to_replace); /* + * Default implementation for BlockDriver.bdrv_child_perm() that can + * be used by block filters and image formats, as long as they use the + * child_of_bds child class and set an appropriate BdrvChildRole. + */ +void bdrv_default_perms(BlockDriverState *bs, BdrvChild *c, + const BdrvChildClass *child_class, BdrvChildRole role, + BlockReopenQueue *reopen_queue, + uint64_t perm, uint64_t shared, + uint64_t *nperm, uint64_t *nshared); + +/* * Default implementation for drivers to pass bdrv_co_block_status() to * their file. */ |