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| author | Xu Liu <liuxu623@gmail.com> | 2021-08-18 12:58:19 +0200 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2021-08-19 00:30:01 +0200 |
| commit | 6cf1770d63dd2d0d0d4048e7b3ee360336c072d9 (patch) | |
| tree | e7acefe8abd58d375086d7b064f2e4fedae60f04 /net | |
| parent | libbpf: Rename libbpf documentation index file (diff) | |
| download | linux-6cf1770d63dd2d0d0d4048e7b3ee360336c072d9.tar.xz linux-6cf1770d63dd2d0d0d4048e7b3ee360336c072d9.zip | |
bpf: Allow bpf_get_netns_cookie in BPF_PROG_TYPE_SOCK_OPS
We'd like to be able to identify netns from sockops hooks to
accelerate local process communication form different netns.
Signed-off-by: Xu Liu <liuxu623@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20210818105820.91894-2-liuxu623@gmail.com
Diffstat (limited to 'net')
| -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 5cf38e8886f1..59b8f5050180 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -4676,6 +4676,18 @@ static const struct bpf_func_proto bpf_get_netns_cookie_sock_addr_proto = { .arg1_type = ARG_PTR_TO_CTX_OR_NULL, }; +BPF_CALL_1(bpf_get_netns_cookie_sock_ops, struct bpf_sock_ops_kern *, ctx) +{ + return __bpf_get_netns_cookie(ctx ? ctx->sk : NULL); +} + +static const struct bpf_func_proto bpf_get_netns_cookie_sock_ops_proto = { + .func = bpf_get_netns_cookie_sock_ops, + .gpl_only = false, + .ret_type = RET_INTEGER, + .arg1_type = ARG_PTR_TO_CTX_OR_NULL, +}; + BPF_CALL_1(bpf_get_socket_uid, struct sk_buff *, skb) { struct sock *sk = sk_to_full_sk(skb->sk); @@ -7491,6 +7503,8 @@ sock_ops_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) return &bpf_sk_storage_get_proto; case BPF_FUNC_sk_storage_delete: return &bpf_sk_storage_delete_proto; + case BPF_FUNC_get_netns_cookie: + return &bpf_get_netns_cookie_sock_ops_proto; #ifdef CONFIG_INET case BPF_FUNC_load_hdr_opt: return &bpf_sock_ops_load_hdr_opt_proto; |