78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
|
#ifndef _BPF_CGROUP_H
|
||
|
|
#define _BPF_CGROUP_H
|
||
|
|
|
||
|
|
#include <linux/jump_label.h>
|
||
|
|
#include <uapi/linux/bpf.h>
|
||
|
|
|
||
|
|
struct sock;
|
||
|
|
struct cgroup;
|
||
|
|
struct sk_buff;
|
||
|
|
|
||
|
|
#ifdef CONFIG_CGROUP_BPF
|
||
|
|
|
||
|
|
extern struct static_key_false cgroup_bpf_enabled_key;
|
||
|
|
#define cgroup_bpf_enabled static_branch_unlikely(&cgroup_bpf_enabled_key)
|
||
|
|
|
||
|
|
struct cgroup_bpf {
|
||
|
|
/*
|
||
|
|
* Store two sets of bpf_prog pointers, one for programs that are
|
||
|
|
* pinned directly to this cgroup, and one for those that are effective
|
||
|
|
* when this cgroup is accessed.
|
||
|
|
*/
|
||
|
|
struct bpf_prog *prog[MAX_BPF_ATTACH_TYPE];
|
||
|
|
struct bpf_prog *effective[MAX_BPF_ATTACH_TYPE];
|
||
|
|
bool disallow_override[MAX_BPF_ATTACH_TYPE];
|
||
|
|
};
|
||
|
|
|
||
|
|
void cgroup_bpf_put(struct cgroup *cgrp);
|
||
|
|
void cgroup_bpf_inherit(struct cgroup *cgrp, struct cgroup *parent);
|
||
|
|
|
||
|
|
int __cgroup_bpf_update(struct cgroup *cgrp, struct cgroup *parent,
|
||
|
|
struct bpf_prog *prog, enum bpf_attach_type type,
|
||
|
|
bool overridable);
|
||
|
|
|
||
|
|
/* Wrapper for __cgroup_bpf_update() protected by cgroup_mutex */
|
||
|
|
int cgroup_bpf_update(struct cgroup *cgrp, struct bpf_prog *prog,
|
||
|
|
enum bpf_attach_type type, bool overridable);
|
||
|
|
|
||
|
|
int __cgroup_bpf_run_filter(struct sock *sk,
|
||
|
|
struct sk_buff *skb,
|
||
|
|
enum bpf_attach_type type);
|
||
|
|
|
||
|
|
/* Wrappers for __cgroup_bpf_run_filter() guarded by cgroup_bpf_enabled. */
|
||
|
|
#define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk,skb) \
|
||
|
|
({ \
|
||
|
|
int __ret = 0; \
|
||
|
|
if (cgroup_bpf_enabled) \
|
||
|
|
__ret = __cgroup_bpf_run_filter(sk, skb, \
|
||
|
|
BPF_CGROUP_INET_INGRESS); \
|
||
|
|
\
|
||
|
|
__ret; \
|
||
|
|
})
|
||
|
|
|
||
|
|
#define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk,skb) \
|
||
|
|
({ \
|
||
|
|
int __ret = 0; \
|
||
|
|
if (cgroup_bpf_enabled && sk && sk == skb->sk) { \
|
||
|
|
typeof(sk) __sk = sk_to_full_sk(sk); \
|
||
|
|
if (sk_fullsock(__sk)) \
|
||
|
|
__ret = __cgroup_bpf_run_filter(__sk, skb, \
|
||
|
|
BPF_CGROUP_INET_EGRESS); \
|
||
|
|
} \
|
||
|
|
__ret; \
|
||
|
|
})
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
struct cgroup_bpf {};
|
||
|
|
static inline void cgroup_bpf_put(struct cgroup *cgrp) {}
|
||
|
|
static inline void cgroup_bpf_inherit(struct cgroup *cgrp,
|
||
|
|
struct cgroup *parent) {}
|
||
|
|
|
||
|
|
#define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk,skb) ({ 0; })
|
||
|
|
#define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk,skb) ({ 0; })
|
||
|
|
|
||
|
|
#endif /* CONFIG_CGROUP_BPF */
|
||
|
|
|
||
|
|
#endif /* _BPF_CGROUP_H */
|