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30070984 DM |
1 | #ifndef _BPF_CGROUP_H |
2 | #define _BPF_CGROUP_H | |
3 | ||
30070984 DM |
4 | #include <linux/jump_label.h> |
5 | #include <uapi/linux/bpf.h> | |
6 | ||
7 | struct sock; | |
8 | struct cgroup; | |
9 | struct sk_buff; | |
10 | ||
11 | #ifdef CONFIG_CGROUP_BPF | |
12 | ||
13 | extern struct static_key_false cgroup_bpf_enabled_key; | |
14 | #define cgroup_bpf_enabled static_branch_unlikely(&cgroup_bpf_enabled_key) | |
15 | ||
16 | struct cgroup_bpf { | |
17 | /* | |
18 | * Store two sets of bpf_prog pointers, one for programs that are | |
19 | * pinned directly to this cgroup, and one for those that are effective | |
20 | * when this cgroup is accessed. | |
21 | */ | |
22 | struct bpf_prog *prog[MAX_BPF_ATTACH_TYPE]; | |
23 | struct bpf_prog *effective[MAX_BPF_ATTACH_TYPE]; | |
24 | }; | |
25 | ||
26 | void cgroup_bpf_put(struct cgroup *cgrp); | |
27 | void cgroup_bpf_inherit(struct cgroup *cgrp, struct cgroup *parent); | |
28 | ||
29 | void __cgroup_bpf_update(struct cgroup *cgrp, | |
30 | struct cgroup *parent, | |
31 | struct bpf_prog *prog, | |
32 | enum bpf_attach_type type); | |
33 | ||
34 | /* Wrapper for __cgroup_bpf_update() protected by cgroup_mutex */ | |
35 | void cgroup_bpf_update(struct cgroup *cgrp, | |
36 | struct bpf_prog *prog, | |
37 | enum bpf_attach_type type); | |
38 | ||
b2cd1257 DA |
39 | int __cgroup_bpf_run_filter_skb(struct sock *sk, |
40 | struct sk_buff *skb, | |
41 | enum bpf_attach_type type); | |
42 | ||
61023658 DA |
43 | int __cgroup_bpf_run_filter_sk(struct sock *sk, |
44 | enum bpf_attach_type type); | |
45 | ||
b2cd1257 DA |
46 | /* Wrappers for __cgroup_bpf_run_filter_skb() guarded by cgroup_bpf_enabled. */ |
47 | #define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk, skb) \ | |
48 | ({ \ | |
49 | int __ret = 0; \ | |
50 | if (cgroup_bpf_enabled) \ | |
51 | __ret = __cgroup_bpf_run_filter_skb(sk, skb, \ | |
52 | BPF_CGROUP_INET_INGRESS); \ | |
53 | \ | |
54 | __ret; \ | |
30070984 DM |
55 | }) |
56 | ||
b2cd1257 DA |
57 | #define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk, skb) \ |
58 | ({ \ | |
59 | int __ret = 0; \ | |
60 | if (cgroup_bpf_enabled && sk && sk == skb->sk) { \ | |
61 | typeof(sk) __sk = sk_to_full_sk(sk); \ | |
62 | if (sk_fullsock(__sk)) \ | |
63 | __ret = __cgroup_bpf_run_filter_skb(__sk, skb, \ | |
64 | BPF_CGROUP_INET_EGRESS); \ | |
65 | } \ | |
66 | __ret; \ | |
30070984 DM |
67 | }) |
68 | ||
61023658 DA |
69 | #define BPF_CGROUP_RUN_PROG_INET_SOCK(sk) \ |
70 | ({ \ | |
71 | int __ret = 0; \ | |
72 | if (cgroup_bpf_enabled && sk) { \ | |
73 | __ret = __cgroup_bpf_run_filter_sk(sk, \ | |
74 | BPF_CGROUP_INET_SOCK_CREATE); \ | |
75 | } \ | |
76 | __ret; \ | |
77 | }) | |
78 | ||
30070984 DM |
79 | #else |
80 | ||
81 | struct cgroup_bpf {}; | |
82 | static inline void cgroup_bpf_put(struct cgroup *cgrp) {} | |
83 | static inline void cgroup_bpf_inherit(struct cgroup *cgrp, | |
84 | struct cgroup *parent) {} | |
85 | ||
86 | #define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk,skb) ({ 0; }) | |
87 | #define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk,skb) ({ 0; }) | |
61023658 | 88 | #define BPF_CGROUP_RUN_PROG_INET_SOCK(sk) ({ 0; }) |
30070984 DM |
89 | |
90 | #endif /* CONFIG_CGROUP_BPF */ | |
91 | ||
92 | #endif /* _BPF_CGROUP_H */ |