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v6.6.100
linux-yocto/include/linux/bpf-cgroup.h
Yonghong Song bc8023ef3b bpf: Allow pre-ordering for bpf cgroup progs 
[ Upstream commit 4b82b181a2 ]

Currently for bpf progs in a cgroup hierarchy, the effective prog array
is computed from bottom cgroup to upper cgroups (post-ordering). For
example, the following cgroup hierarchy
    root cgroup: p1, p2
        subcgroup: p3, p4
have BPF_F_ALLOW_MULTI for both cgroup levels.
The effective cgroup array ordering looks like
    p3 p4 p1 p2
and at run time, progs will execute based on that order.

But in some cases, it is desirable to have root prog executes earlier than
children progs (pre-ordering). For example,
  - prog p1 intends to collect original pkt dest addresses.
  - prog p3 will modify original pkt dest addresses to a proxy address for
    security reason.
The end result is that prog p1 gets proxy address which is not what it
wants. Putting p1 to every child cgroup is not desirable either as it
will duplicate itself in many child cgroups. And this is exactly a use case
we are encountering in Meta.

To fix this issue, let us introduce a flag BPF_F_PREORDER. If the flag
is specified at attachment time, the prog has higher priority and the
ordering with that flag will be from top to bottom (pre-ordering).
For example, in the above example,
    root cgroup: p1, p2
        subcgroup: p3, p4
Let us say p2 and p4 are marked with BPF_F_PREORDER. The final
effective array ordering will be
    p2 p4 p3 p1

Suggested-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20250224230116.283071-1-yonghong.song@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2025-06-04 14:41:58 +02:00

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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BPF_CGROUP_H
#define _BPF_CGROUP_H
#include <linux/bpf.h>
#include <linux/bpf-cgroup-defs.h>
#include <linux/errno.h>
#include <linux/jump_label.h>
#include <linux/percpu.h>
#include <linux/rbtree.h>
#include <net/sock.h>
#include <uapi/linux/bpf.h>
struct sock;
struct sockaddr;
struct cgroup;
struct sk_buff;
struct bpf_map;
struct bpf_prog;
struct bpf_sock_ops_kern;
struct bpf_cgroup_storage;
struct ctl_table;
struct ctl_table_header;
struct task_struct;
unsigned int __cgroup_bpf_run_lsm_sock(const void *ctx,
const struct bpf_insn *insn);
unsigned int __cgroup_bpf_run_lsm_socket(const void *ctx,
const struct bpf_insn *insn);
unsigned int __cgroup_bpf_run_lsm_current(const void *ctx,
const struct bpf_insn *insn);
#ifdef CONFIG_CGROUP_BPF
#define CGROUP_ATYPE(type) \
case BPF_##type: return type
static inline enum cgroup_bpf_attach_type
to_cgroup_bpf_attach_type(enum bpf_attach_type attach_type)
{
switch (attach_type) {
CGROUP_ATYPE(CGROUP_INET_INGRESS);
CGROUP_ATYPE(CGROUP_INET_EGRESS);
CGROUP_ATYPE(CGROUP_INET_SOCK_CREATE);
CGROUP_ATYPE(CGROUP_SOCK_OPS);
CGROUP_ATYPE(CGROUP_DEVICE);
CGROUP_ATYPE(CGROUP_INET4_BIND);
CGROUP_ATYPE(CGROUP_INET6_BIND);
CGROUP_ATYPE(CGROUP_INET4_CONNECT);
CGROUP_ATYPE(CGROUP_INET6_CONNECT);
CGROUP_ATYPE(CGROUP_INET4_POST_BIND);
CGROUP_ATYPE(CGROUP_INET6_POST_BIND);
CGROUP_ATYPE(CGROUP_UDP4_SENDMSG);
CGROUP_ATYPE(CGROUP_UDP6_SENDMSG);
CGROUP_ATYPE(CGROUP_SYSCTL);
CGROUP_ATYPE(CGROUP_UDP4_RECVMSG);
CGROUP_ATYPE(CGROUP_UDP6_RECVMSG);
CGROUP_ATYPE(CGROUP_GETSOCKOPT);
CGROUP_ATYPE(CGROUP_SETSOCKOPT);
CGROUP_ATYPE(CGROUP_INET4_GETPEERNAME);
CGROUP_ATYPE(CGROUP_INET6_GETPEERNAME);
CGROUP_ATYPE(CGROUP_INET4_GETSOCKNAME);
CGROUP_ATYPE(CGROUP_INET6_GETSOCKNAME);
CGROUP_ATYPE(CGROUP_INET_SOCK_RELEASE);
default:
return CGROUP_BPF_ATTACH_TYPE_INVALID;
}
}
#undef CGROUP_ATYPE
extern struct static_key_false cgroup_bpf_enabled_key[MAX_CGROUP_BPF_ATTACH_TYPE];
#define cgroup_bpf_enabled(atype) static_branch_unlikely(&cgroup_bpf_enabled_key[atype])
#define for_each_cgroup_storage_type(stype) \
for (stype = 0; stype < MAX_BPF_CGROUP_STORAGE_TYPE; stype++)
struct bpf_cgroup_storage_map;
struct bpf_storage_buffer {
struct rcu_head rcu;
char data[];
};
struct bpf_cgroup_storage {
union {
struct bpf_storage_buffer *buf;
void __percpu *percpu_buf;
};
struct bpf_cgroup_storage_map *map;
struct bpf_cgroup_storage_key key;
struct list_head list_map;
struct list_head list_cg;
struct rb_node node;
struct rcu_head rcu;
};
struct bpf_cgroup_link {
struct bpf_link link;
struct cgroup *cgroup;
enum bpf_attach_type type;
};
struct bpf_prog_list {
struct hlist_node node;
struct bpf_prog *prog;
struct bpf_cgroup_link *link;
struct bpf_cgroup_storage *storage[MAX_BPF_CGROUP_STORAGE_TYPE];
u32 flags;
};
int cgroup_bpf_inherit(struct cgroup *cgrp);
void cgroup_bpf_offline(struct cgroup *cgrp);
int __cgroup_bpf_run_filter_skb(struct sock *sk,
struct sk_buff *skb,
enum cgroup_bpf_attach_type atype);
int __cgroup_bpf_run_filter_sk(struct sock *sk,
enum cgroup_bpf_attach_type atype);
int __cgroup_bpf_run_filter_sock_addr(struct sock *sk,
struct sockaddr *uaddr,
int *uaddrlen,
enum cgroup_bpf_attach_type atype,
void *t_ctx,
u32 *flags);
int __cgroup_bpf_run_filter_sock_ops(struct sock *sk,
struct bpf_sock_ops_kern *sock_ops,
enum cgroup_bpf_attach_type atype);
int __cgroup_bpf_check_dev_permission(short dev_type, u32 major, u32 minor,
short access, enum cgroup_bpf_attach_type atype);
int __cgroup_bpf_run_filter_sysctl(struct ctl_table_header *head,
struct ctl_table *table, int write,
char **buf, size_t *pcount, loff_t *ppos,
enum cgroup_bpf_attach_type atype);
int __cgroup_bpf_run_filter_setsockopt(struct sock *sock, int *level,
int *optname, sockptr_t optval,
int *optlen, char **kernel_optval);
int __cgroup_bpf_run_filter_getsockopt(struct sock *sk, int level,
int optname, sockptr_t optval,
sockptr_t optlen, int max_optlen,
int retval);
int __cgroup_bpf_run_filter_getsockopt_kern(struct sock *sk, int level,
int optname, void *optval,
int *optlen, int retval);
static inline enum bpf_cgroup_storage_type cgroup_storage_type(
struct bpf_map *map)
{
if (map->map_type == BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE)
return BPF_CGROUP_STORAGE_PERCPU;
return BPF_CGROUP_STORAGE_SHARED;
}
struct bpf_cgroup_storage *
cgroup_storage_lookup(struct bpf_cgroup_storage_map *map,
void *key, bool locked);
struct bpf_cgroup_storage *bpf_cgroup_storage_alloc(struct bpf_prog *prog,
enum bpf_cgroup_storage_type stype);
void bpf_cgroup_storage_free(struct bpf_cgroup_storage *storage);
void bpf_cgroup_storage_link(struct bpf_cgroup_storage *storage,
struct cgroup *cgroup,
enum bpf_attach_type type);
void bpf_cgroup_storage_unlink(struct bpf_cgroup_storage *storage);
int bpf_cgroup_storage_assign(struct bpf_prog_aux *aux, struct bpf_map *map);
int bpf_percpu_cgroup_storage_copy(struct bpf_map *map, void *key, void *value);
int bpf_percpu_cgroup_storage_update(struct bpf_map *map, void *key,
void *value, u64 flags);
/* Opportunistic check to see whether we have any BPF program attached*/
static inline bool cgroup_bpf_sock_enabled(struct sock *sk,
enum cgroup_bpf_attach_type type)
{
struct cgroup *cgrp = sock_cgroup_ptr(&sk->sk_cgrp_data);
struct bpf_prog_array *array;
array = rcu_access_pointer(cgrp->bpf.effective[type]);
return array != &bpf_empty_prog_array.hdr;
}
/* Wrappers for __cgroup_bpf_run_filter_skb() guarded by cgroup_bpf_enabled. */
#define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk, skb) \
({ \
int __ret = 0; \
if (cgroup_bpf_enabled(CGROUP_INET_INGRESS) && \
cgroup_bpf_sock_enabled(sk, CGROUP_INET_INGRESS)) \
__ret = __cgroup_bpf_run_filter_skb(sk, skb, \
CGROUP_INET_INGRESS); \
\
__ret; \
})
#define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk, skb) \
({ \
int __ret = 0; \
if (cgroup_bpf_enabled(CGROUP_INET_EGRESS) && sk) { \
typeof(sk) __sk = sk_to_full_sk(sk); \
if (sk_fullsock(__sk) && __sk == skb_to_full_sk(skb) && \
cgroup_bpf_sock_enabled(__sk, CGROUP_INET_EGRESS)) \
__ret = __cgroup_bpf_run_filter_skb(__sk, skb, \
CGROUP_INET_EGRESS); \
} \
__ret; \
})
#define BPF_CGROUP_RUN_SK_PROG(sk, atype) \
({ \
int __ret = 0; \
if (cgroup_bpf_enabled(atype)) { \
__ret = __cgroup_bpf_run_filter_sk(sk, atype); \
} \
__ret; \
})
#define BPF_CGROUP_RUN_PROG_INET_SOCK(sk) \
BPF_CGROUP_RUN_SK_PROG(sk, CGROUP_INET_SOCK_CREATE)
#define BPF_CGROUP_RUN_PROG_INET_SOCK_RELEASE(sk) \
BPF_CGROUP_RUN_SK_PROG(sk, CGROUP_INET_SOCK_RELEASE)
#define BPF_CGROUP_RUN_PROG_INET4_POST_BIND(sk) \
BPF_CGROUP_RUN_SK_PROG(sk, CGROUP_INET4_POST_BIND)
#define BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk) \
BPF_CGROUP_RUN_SK_PROG(sk, CGROUP_INET6_POST_BIND)
#define BPF_CGROUP_RUN_SA_PROG(sk, uaddr, uaddrlen, atype) \
({ \
int __ret = 0; \
if (cgroup_bpf_enabled(atype)) \
__ret = __cgroup_bpf_run_filter_sock_addr(sk, uaddr, uaddrlen, \
atype, NULL, NULL); \
__ret; \
})
#define BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, atype, t_ctx) \
({ \
int __ret = 0; \
if (cgroup_bpf_enabled(atype)) { \
lock_sock(sk); \
__ret = __cgroup_bpf_run_filter_sock_addr(sk, uaddr, uaddrlen, \
atype, t_ctx, NULL); \
release_sock(sk); \
} \
__ret; \
})
/* BPF_CGROUP_INET4_BIND and BPF_CGROUP_INET6_BIND can return extra flags
* via upper bits of return code. The only flag that is supported
* (at bit position 0) is to indicate CAP_NET_BIND_SERVICE capability check
* should be bypassed (BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE).
*/
#define BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr, uaddrlen, atype, bind_flags) \
({ \
u32 __flags = 0; \
int __ret = 0; \
if (cgroup_bpf_enabled(atype)) { \
lock_sock(sk); \
__ret = __cgroup_bpf_run_filter_sock_addr(sk, uaddr, uaddrlen, \
atype, NULL, &__flags); \
release_sock(sk); \
if (__flags & BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE) \
*bind_flags |= BIND_NO_CAP_NET_BIND_SERVICE; \
} \
__ret; \
})
#define BPF_CGROUP_PRE_CONNECT_ENABLED(sk) \
((cgroup_bpf_enabled(CGROUP_INET4_CONNECT) || \
cgroup_bpf_enabled(CGROUP_INET6_CONNECT)) && \
(sk)->sk_prot->pre_connect)
#define BPF_CGROUP_RUN_PROG_INET4_CONNECT(sk, uaddr, uaddrlen) \
BPF_CGROUP_RUN_SA_PROG(sk, uaddr, uaddrlen, CGROUP_INET4_CONNECT)
#define BPF_CGROUP_RUN_PROG_INET6_CONNECT(sk, uaddr, uaddrlen) \
BPF_CGROUP_RUN_SA_PROG(sk, uaddr, uaddrlen, CGROUP_INET6_CONNECT)
#define BPF_CGROUP_RUN_PROG_INET4_CONNECT_LOCK(sk, uaddr, uaddrlen) \
BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, CGROUP_INET4_CONNECT, NULL)
#define BPF_CGROUP_RUN_PROG_INET6_CONNECT_LOCK(sk, uaddr, uaddrlen) \
BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, CGROUP_INET6_CONNECT, NULL)
#define BPF_CGROUP_RUN_PROG_UDP4_SENDMSG_LOCK(sk, uaddr, uaddrlen, t_ctx) \
BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, CGROUP_UDP4_SENDMSG, t_ctx)
#define BPF_CGROUP_RUN_PROG_UDP6_SENDMSG_LOCK(sk, uaddr, uaddrlen, t_ctx) \
BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, CGROUP_UDP6_SENDMSG, t_ctx)
#define BPF_CGROUP_RUN_PROG_UDP4_RECVMSG_LOCK(sk, uaddr, uaddrlen) \
BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, CGROUP_UDP4_RECVMSG, NULL)
#define BPF_CGROUP_RUN_PROG_UDP6_RECVMSG_LOCK(sk, uaddr, uaddrlen) \
BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, CGROUP_UDP6_RECVMSG, NULL)
/* The SOCK_OPS"_SK" macro should be used when sock_ops->sk is not a
* fullsock and its parent fullsock cannot be traced by
* sk_to_full_sk().
*
* e.g. sock_ops->sk is a request_sock and it is under syncookie mode.
* Its listener-sk is not attached to the rsk_listener.
* In this case, the caller holds the listener-sk (unlocked),
* set its sock_ops->sk to req_sk, and call this SOCK_OPS"_SK" with
* the listener-sk such that the cgroup-bpf-progs of the
* listener-sk will be run.
*
* Regardless of syncookie mode or not,
* calling bpf_setsockopt on listener-sk will not make sense anyway,
* so passing 'sock_ops->sk == req_sk' to the bpf prog is appropriate here.
*/
#define BPF_CGROUP_RUN_PROG_SOCK_OPS_SK(sock_ops, sk) \
({ \
int __ret = 0; \
if (cgroup_bpf_enabled(CGROUP_SOCK_OPS)) \
__ret = __cgroup_bpf_run_filter_sock_ops(sk, \
sock_ops, \
CGROUP_SOCK_OPS); \
__ret; \
})
#define BPF_CGROUP_RUN_PROG_SOCK_OPS(sock_ops) \
({ \
int __ret = 0; \
if (cgroup_bpf_enabled(CGROUP_SOCK_OPS) && (sock_ops)->sk) { \
typeof(sk) __sk = sk_to_full_sk((sock_ops)->sk); \
if (__sk && sk_fullsock(__sk)) \
__ret = __cgroup_bpf_run_filter_sock_ops(__sk, \
sock_ops, \
CGROUP_SOCK_OPS); \
} \
__ret; \
})
#define BPF_CGROUP_RUN_PROG_DEVICE_CGROUP(atype, major, minor, access) \
({ \
int __ret = 0; \
if (cgroup_bpf_enabled(CGROUP_DEVICE)) \
__ret = __cgroup_bpf_check_dev_permission(atype, major, minor, \
access, \
CGROUP_DEVICE); \
\
__ret; \
})
#define BPF_CGROUP_RUN_PROG_SYSCTL(head, table, write, buf, count, pos) \
({ \
int __ret = 0; \
if (cgroup_bpf_enabled(CGROUP_SYSCTL)) \
__ret = __cgroup_bpf_run_filter_sysctl(head, table, write, \
buf, count, pos, \
CGROUP_SYSCTL); \
__ret; \
})
#define BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock, level, optname, optval, optlen, \
kernel_optval) \
({ \
int __ret = 0; \
if (cgroup_bpf_enabled(CGROUP_SETSOCKOPT) && \
cgroup_bpf_sock_enabled(sock, CGROUP_SETSOCKOPT)) \
__ret = __cgroup_bpf_run_filter_setsockopt(sock, level, \
optname, optval, \
optlen, \
kernel_optval); \
__ret; \
})
#define BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock, level, optname, optval, optlen, \
max_optlen, retval) \
({ \
int __ret = retval; \
if (cgroup_bpf_enabled(CGROUP_GETSOCKOPT) && \
cgroup_bpf_sock_enabled(sock, CGROUP_GETSOCKOPT)) \
if (!(sock)->sk_prot->bpf_bypass_getsockopt || \
!INDIRECT_CALL_INET_1((sock)->sk_prot->bpf_bypass_getsockopt, \
tcp_bpf_bypass_getsockopt, \
level, optname)) \
__ret = __cgroup_bpf_run_filter_getsockopt( \
sock, level, optname, optval, optlen, \
max_optlen, retval); \
__ret; \
})
#define BPF_CGROUP_RUN_PROG_GETSOCKOPT_KERN(sock, level, optname, optval, \
optlen, retval) \
({ \
int __ret = retval; \
if (cgroup_bpf_enabled(CGROUP_GETSOCKOPT)) \
__ret = __cgroup_bpf_run_filter_getsockopt_kern( \
sock, level, optname, optval, optlen, retval); \
__ret; \
})
int cgroup_bpf_prog_attach(const union bpf_attr *attr,
enum bpf_prog_type ptype, struct bpf_prog *prog);
int cgroup_bpf_prog_detach(const union bpf_attr *attr,
enum bpf_prog_type ptype);
int cgroup_bpf_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
int cgroup_bpf_prog_query(const union bpf_attr *attr,
union bpf_attr __user *uattr);
const struct bpf_func_proto *
cgroup_common_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog);
const struct bpf_func_proto *
cgroup_current_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog);
#else
static inline int cgroup_bpf_inherit(struct cgroup *cgrp) { return 0; }
static inline void cgroup_bpf_offline(struct cgroup *cgrp) {}
static inline int cgroup_bpf_prog_attach(const union bpf_attr *attr,
enum bpf_prog_type ptype,
struct bpf_prog *prog)
{
return -EINVAL;
}
static inline int cgroup_bpf_prog_detach(const union bpf_attr *attr,
enum bpf_prog_type ptype)
{
return -EINVAL;
}
static inline int cgroup_bpf_link_attach(const union bpf_attr *attr,
struct bpf_prog *prog)
{
return -EINVAL;
}
static inline int cgroup_bpf_prog_query(const union bpf_attr *attr,
union bpf_attr __user *uattr)
{
return -EINVAL;
}
static inline const struct bpf_func_proto *
cgroup_common_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
{
return NULL;
}
static inline const struct bpf_func_proto *
cgroup_current_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
{
return NULL;
}
static inline int bpf_cgroup_storage_assign(struct bpf_prog_aux *aux,
struct bpf_map *map) { return 0; }
static inline struct bpf_cgroup_storage *bpf_cgroup_storage_alloc(
struct bpf_prog *prog, enum bpf_cgroup_storage_type stype) { return NULL; }
static inline void bpf_cgroup_storage_free(
struct bpf_cgroup_storage *storage) {}
static inline int bpf_percpu_cgroup_storage_copy(struct bpf_map *map, void *key,
void *value) {
return 0;
}
static inline int bpf_percpu_cgroup_storage_update(struct bpf_map *map,
void *key, void *value, u64 flags) {
return 0;
}
#define cgroup_bpf_enabled(atype) (0)
#define BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, atype, t_ctx) ({ 0; })
#define BPF_CGROUP_RUN_SA_PROG(sk, uaddr, uaddrlen, atype) ({ 0; })
#define BPF_CGROUP_PRE_CONNECT_ENABLED(sk) (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; })
#define BPF_CGROUP_RUN_PROG_INET_SOCK_RELEASE(sk) ({ 0; })
#define BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr, uaddrlen, atype, flags) ({ 0; })
#define BPF_CGROUP_RUN_PROG_INET4_POST_BIND(sk) ({ 0; })
#define BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk) ({ 0; })
#define BPF_CGROUP_RUN_PROG_INET4_CONNECT(sk, uaddr, uaddrlen) ({ 0; })
#define BPF_CGROUP_RUN_PROG_INET4_CONNECT_LOCK(sk, uaddr, uaddrlen) ({ 0; })
#define BPF_CGROUP_RUN_PROG_INET6_CONNECT(sk, uaddr, uaddrlen) ({ 0; })
#define BPF_CGROUP_RUN_PROG_INET6_CONNECT_LOCK(sk, uaddr, uaddrlen) ({ 0; })
#define BPF_CGROUP_RUN_PROG_UDP4_SENDMSG_LOCK(sk, uaddr, uaddrlen, t_ctx) ({ 0; })
#define BPF_CGROUP_RUN_PROG_UDP6_SENDMSG_LOCK(sk, uaddr, uaddrlen, t_ctx) ({ 0; })
#define BPF_CGROUP_RUN_PROG_UDP4_RECVMSG_LOCK(sk, uaddr, uaddrlen) ({ 0; })
#define BPF_CGROUP_RUN_PROG_UDP6_RECVMSG_LOCK(sk, uaddr, uaddrlen) ({ 0; })
#define BPF_CGROUP_RUN_PROG_SOCK_OPS(sock_ops) ({ 0; })
#define BPF_CGROUP_RUN_PROG_DEVICE_CGROUP(atype, major, minor, access) ({ 0; })
#define BPF_CGROUP_RUN_PROG_SYSCTL(head,table,write,buf,count,pos) ({ 0; })
#define BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock, level, optname, optval, \
optlen, max_optlen, retval) ({ retval; })
#define BPF_CGROUP_RUN_PROG_GETSOCKOPT_KERN(sock, level, optname, optval, \
optlen, retval) ({ retval; })
#define BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock, level, optname, optval, optlen, \
kernel_optval) ({ 0; })
#define for_each_cgroup_storage_type(stype) for (; false; )
#endif /* CONFIG_CGROUP_BPF */
#endif /* _BPF_CGROUP_H */
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