]> git.proxmox.com Git - mirror_ubuntu-hirsute-kernel.git/commit
bpf: Add BTF_SET_START/END macros
authorJiri Olsa <jolsa@kernel.org>
Tue, 25 Aug 2020 19:21:19 +0000 (21:21 +0200)
committerAlexei Starovoitov <ast@kernel.org>
Tue, 25 Aug 2020 22:37:41 +0000 (15:37 -0700)
commiteae2e83e62633a2659e3bc690facba1c2fc9c45b
tree22f56b258d678de272acfe98e53fb98c01ec10ad
parentfaaf4a790d93794b46d67e2fd69b8e5c8cae2d41
bpf: Add BTF_SET_START/END macros

Adding support to define sorted set of BTF ID values.

Following defines sorted set of BTF ID values:

  BTF_SET_START(btf_allowlist_d_path)
  BTF_ID(func, vfs_truncate)
  BTF_ID(func, vfs_fallocate)
  BTF_ID(func, dentry_open)
  BTF_ID(func, vfs_getattr)
  BTF_ID(func, filp_close)
  BTF_SET_END(btf_allowlist_d_path)

It defines following 'struct btf_id_set' variable to access
values and count:

  struct btf_id_set btf_allowlist_d_path;

Adding 'allowed' callback to struct bpf_func_proto, to allow
verifier the check on allowed callers.

Adding btf_id_set_contains function, which will be used by
allowed callbacks to verify the caller's BTF ID value is
within allowed set.

Also removing extra '\' in __BTF_ID_LIST macro.

Added BTF_SET_START_GLOBAL macro for global sets.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200825192124.710397-10-jolsa@kernel.org
include/linux/bpf.h
include/linux/btf_ids.h
kernel/bpf/btf.c
kernel/bpf/verifier.c
tools/include/linux/btf_ids.h