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author | Dave Marchevsky <davemarchevsky@fb.com> | 2023-07-18 11:38:09 +0300 |
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committer | Alexei Starovoitov <ast@kernel.org> | 2023-07-19 03:23:10 +0300 |
commit | 0a1f7bfe35a3e1302529fa900bf0574a5dfc8ea6 (patch) | |
tree | 4d404588e36745238df0fcd16921c20afda6a041 /include/uapi | |
parent | 60cc1f7d0605598b47ee3c0c2b4b6fbd4da50a06 (diff) | |
download | linux-0a1f7bfe35a3e1302529fa900bf0574a5dfc8ea6.tar.xz |
bpf: Introduce internal definitions for UAPI-opaque bpf_{rb,list}_node
Structs bpf_rb_node and bpf_list_node are opaquely defined in
uapi/linux/bpf.h, as BPF program writers are not expected to touch their
fields - nor does the verifier allow them to do so.
Currently these structs are simple wrappers around structs rb_node and
list_head and linked_list / rbtree implementation just casts and passes
to library functions for those data structures. Later patches in this
series, though, will add an "owner" field to bpf_{rb,list}_node, such
that they're not just wrapping an underlying node type. Moreover, the
bpf linked_list and rbtree implementations will deal with these owner
pointers directly in a few different places.
To avoid having to do
void *owner = (void*)bpf_list_node + sizeof(struct list_head)
with opaque UAPI node types, add bpf_{list,rb}_node_kern struct
definitions to internal headers and modify linked_list and rbtree to use
the internal types where appropriate.
Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com>
Link: https://lore.kernel.org/r/20230718083813.3416104-3-davemarchevsky@fb.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/uapi')
0 files changed, 0 insertions, 0 deletions