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| author |   Yonghong Song <yhs@fb.com> | 2020-07-20 09:33:58 -0700 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2020-07-21 13:26:26 -0700 |
| commit | bc4f0548f683a3d53359cef15f088d2d5bb4bc39 (patch) | |
| tree | f2537b237c573ed4d8316b26adeee72e0b0a4b65 /include | |
| parent | samples/bpf, selftests/bpf: Use bpf_probe_read_kernel (diff) | |
| download | linux-dev-bc4f0548f683a3d53359cef15f088d2d5bb4bc39.tar.xz linux-dev-bc4f0548f683a3d53359cef15f088d2d5bb4bc39.zip | |
bpf: Compute bpf_skc_to_*() helper socket btf ids at build time
Currently, socket types (struct tcp_sock, udp_sock, etc.)
used by bpf_skc_to_*() helpers are computed when vmlinux_btf
is first built in the kernel.
Commit 5a2798ab32ba
("bpf: Add BTF_ID_LIST/BTF_ID/BTF_ID_UNUSED macros")
implemented a mechanism to compute btf_ids at kernel build
time which can simplify kernel implementation and reduce
runtime overhead by removing in-kernel btf_id calculation.
This patch did exactly this, removing in-kernel btf_id
computation and utilizing build-time btf_id computation.
If CONFIG_DEBUG_INFO_BTF is not defined, BTF_ID_LIST will
define an array with size of 5, which is not enough for
btf_sock_ids. So define its own static array if
CONFIG_DEBUG_INFO_BTF is not defined.
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200720163358.1393023-1-yhs@fb.com
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/bpf.h | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h index adb16bdc5f0a..1df1c0fd3f28 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -1541,7 +1541,6 @@ static inline bool bpf_map_is_dev_bound(struct bpf_map *map) struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr); void bpf_map_offload_map_free(struct bpf_map *map); -void init_btf_sock_ids(struct btf *btf); #else static inline int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr) @@ -1567,9 +1566,6 @@ static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr) static inline void bpf_map_offload_map_free(struct bpf_map *map) { } -static inline void init_btf_sock_ids(struct btf *btf) -{ -} #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */ #if defined(CONFIG_BPF_STREAM_PARSER) |