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| author | Xu Liu <liuxu623@gmail.com> | 2021-08-20 15:17:11 +0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-08-24 14:17:53 -0700 |
| commit | fab60e29fcc6d60396da20d63d45fd0d305ba4e4 (patch) | |
| tree | fd84bce9d557fbc71228251ff8dead9bcaa2a15b /net/core/filter.c | |
| parent | 8c0bb89e8e4ddc3519b1a2cf1d503f6b3d1cd38a (diff) | |
| download | linux-stable-fab60e29fcc6d60396da20d63d45fd0d305ba4e4.tar.gz linux-stable-fab60e29fcc6d60396da20d63d45fd0d305ba4e4.tar.bz2 linux-stable-fab60e29fcc6d60396da20d63d45fd0d305ba4e4.zip | |
bpf: Allow bpf_get_netns_cookie in BPF_PROG_TYPE_SK_MSG
We'd like to be able to identify netns from sk_msg hooks
to accelerate local process communication form different netns.
Signed-off-by: Xu Liu <liuxu623@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210820071712.52852-2-liuxu623@gmail.com
Diffstat (limited to 'net/core/filter.c')
| -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 59b8f5050180..cfbd01167eb5 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -4688,6 +4688,18 @@ static const struct bpf_func_proto bpf_get_netns_cookie_sock_ops_proto = { .arg1_type = ARG_PTR_TO_CTX_OR_NULL, }; +BPF_CALL_1(bpf_get_netns_cookie_sk_msg, struct sk_msg *, ctx) +{ + return __bpf_get_netns_cookie(ctx ? ctx->sk : NULL); +} + +static const struct bpf_func_proto bpf_get_netns_cookie_sk_msg_proto = { + .func = bpf_get_netns_cookie_sk_msg, + .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); @@ -7551,6 +7563,8 @@ sk_msg_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_sk_msg_proto; #ifdef CONFIG_CGROUPS case BPF_FUNC_get_current_cgroup_id: return &bpf_get_current_cgroup_id_proto; |