diff options
| author | Daniel Borkmann <daniel@iogearbox.net> | 2020-03-27 16:58:50 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-03-27 19:40:38 -0700 |
| commit | 0e53d9e5e82056555020c47ee0c7a087147be084 (patch) | |
| tree | 4b73d6302c76cbcb11e9e2dc429af19f8ae33b74 /net/core | |
| parent | f54a5bba120398e4d404e9553e6b92e6822eade0 (diff) | |
| download | linux-0e53d9e5e82056555020c47ee0c7a087147be084.tar.bz2 | |
bpf: Enable retrieval of socket cookie for bind/post-bind hook
We currently make heavy use of the socket cookie in BPF's connect(),
sendmsg() and recvmsg() hooks for load-balancing decisions. However,
it is currently not enabled/implemented in BPF {post-}bind hooks
where it can later be used in combination for correlation in the tc
egress path, for example.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/e9d71f310715332f12d238cc650c1edc5be55119.1585323121.git.daniel@iogearbox.net
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/filter.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index 96350a743539..0b6682517d45 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -4117,6 +4117,18 @@ static const struct bpf_func_proto bpf_get_socket_cookie_sock_addr_proto = { .arg1_type = ARG_PTR_TO_CTX, }; +BPF_CALL_1(bpf_get_socket_cookie_sock, struct sock *, ctx) +{ + return sock_gen_cookie(ctx); +} + +static const struct bpf_func_proto bpf_get_socket_cookie_sock_proto = { + .func = bpf_get_socket_cookie_sock, + .gpl_only = false, + .ret_type = RET_INTEGER, + .arg1_type = ARG_PTR_TO_CTX, +}; + BPF_CALL_1(bpf_get_socket_cookie_sock_ops, struct bpf_sock_ops_kern *, ctx) { return sock_gen_cookie(ctx->sk); @@ -5954,6 +5966,8 @@ sock_filter_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) return &bpf_get_current_uid_gid_proto; case BPF_FUNC_get_local_storage: return &bpf_get_local_storage_proto; + case BPF_FUNC_get_socket_cookie: + return &bpf_get_socket_cookie_sock_proto; default: return bpf_base_func_proto(func_id); } |