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| author | Kevin Wolf <kwolf@redhat.com> | 2016-12-15 11:27:32 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2017-02-28 20:40:36 +0100 |
| commit | 6a1b9ee152101868082dbf24ccb683af0431c85b (patch) | |
| tree | 7065d40689b2a7048b3004ce512301f951725dbb /include | |
| parent | 33a610c398603efafd954c706ba07850835a5098 (diff) | |
| download | qemu-6a1b9ee152101868082dbf24ccb683af0431c85b.zip qemu-6a1b9ee152101868082dbf24ccb683af0431c85b.tar.gz qemu-6a1b9ee152101868082dbf24ccb683af0431c85b.tar.bz2 | |
block: Default .bdrv_child_perm() for filter drivers
Most filters need permissions related to read and write for their
children, but only if the node has a parent that wants to use the same
operation on the filter. The same is true for resize.
This adds a default implementation that simply forwards all necessary
permissions to all children of the node and leaves the other permissions
unchanged.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Acked-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/block/block_int.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/block/block_int.h b/include/block/block_int.h index cef2b6e..17f4c2d 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -872,6 +872,14 @@ void bdrv_child_abort_perm_update(BdrvChild *c); int bdrv_child_try_set_perm(BdrvChild *c, uint64_t perm, uint64_t shared, Error **errp); +/* Default implementation for BlockDriver.bdrv_child_perm() that can be used by + * block filters: Forward CONSISTENT_READ, WRITE, WRITE_UNCHANGED and RESIZE to + * all children */ +void bdrv_filter_default_perms(BlockDriverState *bs, BdrvChild *c, + const BdrvChildRole *role, + uint64_t perm, uint64_t shared, + uint64_t *nperm, uint64_t *nshared); + const char *bdrv_get_parent_name(const BlockDriverState *bs); void blk_dev_change_media_cb(BlockBackend *blk, bool load); |