linux/include/uapi
Dave Marchevsky 9c395c1b99 bpf: Add basic bpf_rb_{root,node} support
This patch adds special BPF_RB_{ROOT,NODE} btf_field_types similar to
BPF_LIST_{HEAD,NODE}, adds the necessary plumbing to detect the new
types, and adds bpf_rb_root_free function for freeing bpf_rb_root in
map_values.

structs bpf_rb_root and bpf_rb_node are opaque types meant to
obscure structs rb_root_cached rb_node, respectively.

btf_struct_access will prevent BPF programs from touching these special
fields automatically now that they're recognized.

btf_check_and_fixup_fields now groups list_head and rb_root together as
"graph root" fields and {list,rb}_node as "graph node", and does same
ownership cycle checking as before. Note that this function does _not_
prevent ownership type mixups (e.g. rb_root owning list_node) - that's
handled by btf_parse_graph_root.

After this patch, a bpf program can have a struct bpf_rb_root in a
map_value, but not add anything to nor do anything useful with it.

Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com>
Link: https://lore.kernel.org/r/20230214004017.2534011-2-davemarchevsky@fb.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2023-02-13 19:31:13 -08:00
..
asm-generic uapi: Add missing _UAPI prefix to <asm-generic/types.h> include guard 2022-12-01 16:22:06 +01:00
drm drm/msm updates for 6.2 2022-11-30 17:02:27 +10:00
linux bpf: Add basic bpf_rb_{root,node} support 2023-02-13 19:31:13 -08:00
misc This tag contains habanalabs driver changes for v6.2: 2022-11-29 13:19:29 +01:00
mtd This pull request contains updates for UBI and UBIFS 2022-10-14 18:23:23 -07:00
rdma RDMA/rxe: Extend rxe user ABI to support flush 2022-12-09 19:36:01 -04:00
scsi scsi: scsi_transport_fc: Adjust struct fc_nl_event flex array usage 2022-09-25 12:52:48 -04:00
sound ASoC: Updates for v6.2 2022-12-06 11:13:26 +01:00
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