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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; | |
40304b2a | 10 | struct bpf_sock_ops_kern; |
30070984 DM |
11 | |
12 | #ifdef CONFIG_CGROUP_BPF | |
13 | ||
14 | extern struct static_key_false cgroup_bpf_enabled_key; | |
15 | #define cgroup_bpf_enabled static_branch_unlikely(&cgroup_bpf_enabled_key) | |
16 | ||
17 | struct cgroup_bpf { | |
18 | /* | |
19 | * Store two sets of bpf_prog pointers, one for programs that are | |
20 | * pinned directly to this cgroup, and one for those that are effective | |
21 | * when this cgroup is accessed. | |
22 | */ | |
23 | struct bpf_prog *prog[MAX_BPF_ATTACH_TYPE]; | |
dcdc43d6 | 24 | struct bpf_prog __rcu *effective[MAX_BPF_ATTACH_TYPE]; |
7f677633 | 25 | bool disallow_override[MAX_BPF_ATTACH_TYPE]; |
30070984 DM |
26 | }; |
27 | ||
28 | void cgroup_bpf_put(struct cgroup *cgrp); | |
29 | void cgroup_bpf_inherit(struct cgroup *cgrp, struct cgroup *parent); | |
30 | ||
7f677633 AS |
31 | int __cgroup_bpf_update(struct cgroup *cgrp, struct cgroup *parent, |
32 | struct bpf_prog *prog, enum bpf_attach_type type, | |
33 | bool overridable); | |
30070984 DM |
34 | |
35 | /* Wrapper for __cgroup_bpf_update() protected by cgroup_mutex */ | |
7f677633 AS |
36 | int cgroup_bpf_update(struct cgroup *cgrp, struct bpf_prog *prog, |
37 | enum bpf_attach_type type, bool overridable); | |
30070984 | 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 | ||
40304b2a LB |
46 | int __cgroup_bpf_run_filter_sock_ops(struct sock *sk, |
47 | struct bpf_sock_ops_kern *sock_ops, | |
48 | enum bpf_attach_type type); | |
49 | ||
b2cd1257 DA |
50 | /* Wrappers for __cgroup_bpf_run_filter_skb() guarded by cgroup_bpf_enabled. */ |
51 | #define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk, skb) \ | |
52 | ({ \ | |
53 | int __ret = 0; \ | |
54 | if (cgroup_bpf_enabled) \ | |
55 | __ret = __cgroup_bpf_run_filter_skb(sk, skb, \ | |
56 | BPF_CGROUP_INET_INGRESS); \ | |
57 | \ | |
58 | __ret; \ | |
30070984 DM |
59 | }) |
60 | ||
b2cd1257 DA |
61 | #define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk, skb) \ |
62 | ({ \ | |
63 | int __ret = 0; \ | |
64 | if (cgroup_bpf_enabled && sk && sk == skb->sk) { \ | |
65 | typeof(sk) __sk = sk_to_full_sk(sk); \ | |
66 | if (sk_fullsock(__sk)) \ | |
67 | __ret = __cgroup_bpf_run_filter_skb(__sk, skb, \ | |
68 | BPF_CGROUP_INET_EGRESS); \ | |
69 | } \ | |
70 | __ret; \ | |
30070984 DM |
71 | }) |
72 | ||
61023658 DA |
73 | #define BPF_CGROUP_RUN_PROG_INET_SOCK(sk) \ |
74 | ({ \ | |
75 | int __ret = 0; \ | |
76 | if (cgroup_bpf_enabled && sk) { \ | |
77 | __ret = __cgroup_bpf_run_filter_sk(sk, \ | |
78 | BPF_CGROUP_INET_SOCK_CREATE); \ | |
79 | } \ | |
80 | __ret; \ | |
81 | }) | |
82 | ||
40304b2a LB |
83 | #define BPF_CGROUP_RUN_PROG_SOCK_OPS(sock_ops) \ |
84 | ({ \ | |
85 | int __ret = 0; \ | |
86 | if (cgroup_bpf_enabled && (sock_ops)->sk) { \ | |
87 | typeof(sk) __sk = sk_to_full_sk((sock_ops)->sk); \ | |
df39a9f1 | 88 | if (__sk && sk_fullsock(__sk)) \ |
40304b2a LB |
89 | __ret = __cgroup_bpf_run_filter_sock_ops(__sk, \ |
90 | sock_ops, \ | |
91 | BPF_CGROUP_SOCK_OPS); \ | |
92 | } \ | |
93 | __ret; \ | |
94 | }) | |
30070984 DM |
95 | #else |
96 | ||
97 | struct cgroup_bpf {}; | |
98 | static inline void cgroup_bpf_put(struct cgroup *cgrp) {} | |
99 | static inline void cgroup_bpf_inherit(struct cgroup *cgrp, | |
100 | struct cgroup *parent) {} | |
101 | ||
102 | #define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk,skb) ({ 0; }) | |
103 | #define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk,skb) ({ 0; }) | |
61023658 | 104 | #define BPF_CGROUP_RUN_PROG_INET_SOCK(sk) ({ 0; }) |
40304b2a | 105 | #define BPF_CGROUP_RUN_PROG_SOCK_OPS(sock_ops) ({ 0; }) |
30070984 DM |
106 | |
107 | #endif /* CONFIG_CGROUP_BPF */ | |
108 | ||
109 | #endif /* _BPF_CGROUP_H */ |