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| author | Martin KaFai Lau <kafai@fb.com> | 2021-07-01 13:06:19 -0700 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2021-07-23 16:45:07 -0700 |
| commit | 3cee6fb8e69ecd79be891c89a94974c48a25a437 (patch) | |
| tree | 4f8b1e34f10c77c3589d1b4dc042ff7293616526 /net/core/filter.c | |
| parent | 04c7820b776f1c4b48698574c47de9e940d368e8 (diff) | |
| download | linux-stable-3cee6fb8e69ecd79be891c89a94974c48a25a437.tar.gz linux-stable-3cee6fb8e69ecd79be891c89a94974c48a25a437.tar.bz2 linux-stable-3cee6fb8e69ecd79be891c89a94974c48a25a437.zip | |
bpf: tcp: Support bpf_(get|set)sockopt in bpf tcp iter
This patch allows bpf tcp iter to call bpf_(get|set)sockopt.
To allow a specific bpf iter (tcp here) to call a set of helpers,
get_func_proto function pointer is added to bpf_iter_reg.
The bpf iter is a tracing prog which currently requires
CAP_PERFMON or CAP_SYS_ADMIN, so this patch does not
impose other capability checks for bpf_(get|set)sockopt.
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Acked-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20210701200619.1036715-1-kafai@fb.com
Diffstat (limited to 'net/core/filter.c')
| -rw-r--r-- | net/core/filter.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index 3b4986e96e9c..faf29fd82276 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -5016,6 +5016,40 @@ err_clear: return -EINVAL; } +BPF_CALL_5(bpf_sk_setsockopt, struct sock *, sk, int, level, + int, optname, char *, optval, int, optlen) +{ + return _bpf_setsockopt(sk, level, optname, optval, optlen); +} + +const struct bpf_func_proto bpf_sk_setsockopt_proto = { + .func = bpf_sk_setsockopt, + .gpl_only = false, + .ret_type = RET_INTEGER, + .arg1_type = ARG_PTR_TO_BTF_ID_SOCK_COMMON, + .arg2_type = ARG_ANYTHING, + .arg3_type = ARG_ANYTHING, + .arg4_type = ARG_PTR_TO_MEM, + .arg5_type = ARG_CONST_SIZE, +}; + +BPF_CALL_5(bpf_sk_getsockopt, struct sock *, sk, int, level, + int, optname, char *, optval, int, optlen) +{ + return _bpf_getsockopt(sk, level, optname, optval, optlen); +} + +const struct bpf_func_proto bpf_sk_getsockopt_proto = { + .func = bpf_sk_getsockopt, + .gpl_only = false, + .ret_type = RET_INTEGER, + .arg1_type = ARG_PTR_TO_BTF_ID_SOCK_COMMON, + .arg2_type = ARG_ANYTHING, + .arg3_type = ARG_ANYTHING, + .arg4_type = ARG_PTR_TO_UNINIT_MEM, + .arg5_type = ARG_CONST_SIZE, +}; + BPF_CALL_5(bpf_sock_addr_setsockopt, struct bpf_sock_addr_kern *, ctx, int, level, int, optname, char *, optval, int, optlen) { |