f997b7d053
this #include is unnecessary and brings whole set of
other headers into cgroup-defs.h. Remove it.
Fixes: 3007098494be ("cgroup: add support for eBPF programs")
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Rami Rosen <roszenrami@gmail.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fixes: Change-Id: I3df35d8d3b1261503f9b5bcd90b18c9358f1ac28
("cgroup: add support for eBPF programs")
(cherry picked from commit b634d30a79ecc2d28e61cbe5b1f4443952f37a8f)
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Change-Id: Ie35435947ea16421a538815bdc4953fd67407de6
106 lines
3.0 KiB
C
106 lines
3.0 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 bpf_prog_list {
|
|
struct list_head node;
|
|
struct bpf_prog *prog;
|
|
};
|
|
|
|
struct bpf_prog_array;
|
|
|
|
struct cgroup_bpf {
|
|
/* array of effective progs in this cgroup */
|
|
struct bpf_prog_array __rcu *effective[MAX_BPF_ATTACH_TYPE];
|
|
|
|
/* attached progs to this cgroup and attach flags
|
|
* when flags == 0 or BPF_F_ALLOW_OVERRIDE the progs list will
|
|
* have either zero or one element
|
|
* when BPF_F_ALLOW_MULTI the list can have up to BPF_CGROUP_MAX_PROGS
|
|
*/
|
|
struct list_head progs[MAX_BPF_ATTACH_TYPE];
|
|
u32 flags[MAX_BPF_ATTACH_TYPE];
|
|
|
|
/* temp storage for effective prog array used by prog_attach/detach */
|
|
struct bpf_prog_array __rcu *inactive;
|
|
};
|
|
|
|
void cgroup_bpf_put(struct cgroup *cgrp);
|
|
int cgroup_bpf_inherit(struct cgroup *cgrp);
|
|
|
|
int __cgroup_bpf_attach(struct cgroup *cgrp, struct bpf_prog *prog,
|
|
enum bpf_attach_type type, u32 flags);
|
|
int __cgroup_bpf_detach(struct cgroup *cgrp, struct bpf_prog *prog,
|
|
enum bpf_attach_type type, u32 flags);
|
|
|
|
/* Wrapper for __cgroup_bpf_*() protected by cgroup_mutex */
|
|
int cgroup_bpf_attach(struct cgroup *cgrp, struct bpf_prog *prog,
|
|
enum bpf_attach_type type, u32 flags);
|
|
int cgroup_bpf_detach(struct cgroup *cgrp, struct bpf_prog *prog,
|
|
enum bpf_attach_type type, u32 flags);
|
|
|
|
int __cgroup_bpf_run_filter(struct sock *sk,
|
|
struct sk_buff *skb,
|
|
enum bpf_attach_type type);
|
|
|
|
int __cgroup_bpf_run_filter_sk(struct sock *sk,
|
|
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; \
|
|
})
|
|
|
|
#define BPF_CGROUP_RUN_PROG_INET_SOCK(sk) \
|
|
({ \
|
|
int __ret = 0; \
|
|
if (cgroup_bpf_enabled && sk) { \
|
|
__ret = __cgroup_bpf_run_filter_sk(sk, \
|
|
BPF_CGROUP_INET_SOCK_CREATE); \
|
|
} \
|
|
__ret; \
|
|
})
|
|
|
|
#else
|
|
|
|
struct cgroup_bpf {};
|
|
static inline void cgroup_bpf_put(struct cgroup *cgrp) {}
|
|
static inline int cgroup_bpf_inherit(struct cgroup *cgrp) { return 0; }
|
|
|
|
#define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk,skb) ({ 0; })
|
|
#define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk,skb) ({ 0; })
|
|
#define BPF_CGROUP_RUN_PROG_INET_SOCK(sk) ({ 0; })
|
|
|
|
#endif /* CONFIG_CGROUP_BPF */
|
|
|
|
#endif /* _BPF_CGROUP_H */
|