mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-28 15:13:55 +08:00
b741f16303
This commit introduced per-cpu cgroup local storage. Per-cpu cgroup local storage is very similar to simple cgroup storage (let's call it shared), except all the data is per-cpu. The main goal of per-cpu variant is to implement super fast counters (e.g. packet counters), which don't require neither lookups, neither atomic operations. >From userspace's point of view, accessing a per-cpu cgroup storage is similar to other per-cpu map types (e.g. per-cpu hashmaps and arrays). Writing to a per-cpu cgroup storage is not atomic, but is performed by copying longs, so some minimal atomicity is here, exactly as with other per-cpu maps. Signed-off-by: Roman Gushchin <guro@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Alexei Starovoitov <ast@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
330 lines
11 KiB
C
330 lines
11 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _BPF_CGROUP_H
|
|
#define _BPF_CGROUP_H
|
|
|
|
#include <linux/bpf.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/jump_label.h>
|
|
#include <linux/percpu.h>
|
|
#include <linux/rbtree.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;
|
|
|
|
#ifdef CONFIG_CGROUP_BPF
|
|
|
|
extern struct static_key_false cgroup_bpf_enabled_key;
|
|
#define cgroup_bpf_enabled static_branch_unlikely(&cgroup_bpf_enabled_key)
|
|
|
|
DECLARE_PER_CPU(struct bpf_cgroup_storage*,
|
|
bpf_cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]);
|
|
|
|
#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[0];
|
|
};
|
|
|
|
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;
|
|
struct rb_node node;
|
|
struct rcu_head rcu;
|
|
};
|
|
|
|
struct bpf_prog_list {
|
|
struct list_head node;
|
|
struct bpf_prog *prog;
|
|
struct bpf_cgroup_storage *storage[MAX_BPF_CGROUP_STORAGE_TYPE];
|
|
};
|
|
|
|
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);
|
|
int __cgroup_bpf_query(struct cgroup *cgrp, const union bpf_attr *attr,
|
|
union bpf_attr __user *uattr);
|
|
|
|
/* 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_query(struct cgroup *cgrp, const union bpf_attr *attr,
|
|
union bpf_attr __user *uattr);
|
|
|
|
int __cgroup_bpf_run_filter_skb(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);
|
|
|
|
int __cgroup_bpf_run_filter_sock_addr(struct sock *sk,
|
|
struct sockaddr *uaddr,
|
|
enum bpf_attach_type type,
|
|
void *t_ctx);
|
|
|
|
int __cgroup_bpf_run_filter_sock_ops(struct sock *sk,
|
|
struct bpf_sock_ops_kern *sock_ops,
|
|
enum bpf_attach_type type);
|
|
|
|
int __cgroup_bpf_check_dev_permission(short dev_type, u32 major, u32 minor,
|
|
short access, enum bpf_attach_type type);
|
|
|
|
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;
|
|
}
|
|
|
|
static inline void bpf_cgroup_storage_set(struct bpf_cgroup_storage
|
|
*storage[MAX_BPF_CGROUP_STORAGE_TYPE])
|
|
{
|
|
enum bpf_cgroup_storage_type stype;
|
|
|
|
for_each_cgroup_storage_type(stype)
|
|
this_cpu_write(bpf_cgroup_storage[stype], storage[stype]);
|
|
}
|
|
|
|
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 *prog, struct bpf_map *map);
|
|
void bpf_cgroup_storage_release(struct bpf_prog *prog, 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);
|
|
|
|
/* 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) \
|
|
__ret = __cgroup_bpf_run_filter_skb(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_skb(__sk, skb, \
|
|
BPF_CGROUP_INET_EGRESS); \
|
|
} \
|
|
__ret; \
|
|
})
|
|
|
|
#define BPF_CGROUP_RUN_SK_PROG(sk, type) \
|
|
({ \
|
|
int __ret = 0; \
|
|
if (cgroup_bpf_enabled) { \
|
|
__ret = __cgroup_bpf_run_filter_sk(sk, type); \
|
|
} \
|
|
__ret; \
|
|
})
|
|
|
|
#define BPF_CGROUP_RUN_PROG_INET_SOCK(sk) \
|
|
BPF_CGROUP_RUN_SK_PROG(sk, BPF_CGROUP_INET_SOCK_CREATE)
|
|
|
|
#define BPF_CGROUP_RUN_PROG_INET4_POST_BIND(sk) \
|
|
BPF_CGROUP_RUN_SK_PROG(sk, BPF_CGROUP_INET4_POST_BIND)
|
|
|
|
#define BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk) \
|
|
BPF_CGROUP_RUN_SK_PROG(sk, BPF_CGROUP_INET6_POST_BIND)
|
|
|
|
#define BPF_CGROUP_RUN_SA_PROG(sk, uaddr, type) \
|
|
({ \
|
|
int __ret = 0; \
|
|
if (cgroup_bpf_enabled) \
|
|
__ret = __cgroup_bpf_run_filter_sock_addr(sk, uaddr, type, \
|
|
NULL); \
|
|
__ret; \
|
|
})
|
|
|
|
#define BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, type, t_ctx) \
|
|
({ \
|
|
int __ret = 0; \
|
|
if (cgroup_bpf_enabled) { \
|
|
lock_sock(sk); \
|
|
__ret = __cgroup_bpf_run_filter_sock_addr(sk, uaddr, type, \
|
|
t_ctx); \
|
|
release_sock(sk); \
|
|
} \
|
|
__ret; \
|
|
})
|
|
|
|
#define BPF_CGROUP_RUN_PROG_INET4_BIND(sk, uaddr) \
|
|
BPF_CGROUP_RUN_SA_PROG(sk, uaddr, BPF_CGROUP_INET4_BIND)
|
|
|
|
#define BPF_CGROUP_RUN_PROG_INET6_BIND(sk, uaddr) \
|
|
BPF_CGROUP_RUN_SA_PROG(sk, uaddr, BPF_CGROUP_INET6_BIND)
|
|
|
|
#define BPF_CGROUP_PRE_CONNECT_ENABLED(sk) (cgroup_bpf_enabled && \
|
|
sk->sk_prot->pre_connect)
|
|
|
|
#define BPF_CGROUP_RUN_PROG_INET4_CONNECT(sk, uaddr) \
|
|
BPF_CGROUP_RUN_SA_PROG(sk, uaddr, BPF_CGROUP_INET4_CONNECT)
|
|
|
|
#define BPF_CGROUP_RUN_PROG_INET6_CONNECT(sk, uaddr) \
|
|
BPF_CGROUP_RUN_SA_PROG(sk, uaddr, BPF_CGROUP_INET6_CONNECT)
|
|
|
|
#define BPF_CGROUP_RUN_PROG_INET4_CONNECT_LOCK(sk, uaddr) \
|
|
BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, BPF_CGROUP_INET4_CONNECT, NULL)
|
|
|
|
#define BPF_CGROUP_RUN_PROG_INET6_CONNECT_LOCK(sk, uaddr) \
|
|
BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, BPF_CGROUP_INET6_CONNECT, NULL)
|
|
|
|
#define BPF_CGROUP_RUN_PROG_UDP4_SENDMSG_LOCK(sk, uaddr, t_ctx) \
|
|
BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, BPF_CGROUP_UDP4_SENDMSG, t_ctx)
|
|
|
|
#define BPF_CGROUP_RUN_PROG_UDP6_SENDMSG_LOCK(sk, uaddr, t_ctx) \
|
|
BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, BPF_CGROUP_UDP6_SENDMSG, t_ctx)
|
|
|
|
#define BPF_CGROUP_RUN_PROG_SOCK_OPS(sock_ops) \
|
|
({ \
|
|
int __ret = 0; \
|
|
if (cgroup_bpf_enabled && (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, \
|
|
BPF_CGROUP_SOCK_OPS); \
|
|
} \
|
|
__ret; \
|
|
})
|
|
|
|
#define BPF_CGROUP_RUN_PROG_DEVICE_CGROUP(type, major, minor, access) \
|
|
({ \
|
|
int __ret = 0; \
|
|
if (cgroup_bpf_enabled) \
|
|
__ret = __cgroup_bpf_check_dev_permission(type, major, minor, \
|
|
access, \
|
|
BPF_CGROUP_DEVICE); \
|
|
\
|
|
__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_prog_query(const union bpf_attr *attr,
|
|
union bpf_attr __user *uattr);
|
|
#else
|
|
|
|
struct bpf_prog;
|
|
struct cgroup_bpf {};
|
|
static inline void cgroup_bpf_put(struct cgroup *cgrp) {}
|
|
static inline int cgroup_bpf_inherit(struct cgroup *cgrp) { return 0; }
|
|
|
|
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_prog_query(const union bpf_attr *attr,
|
|
union bpf_attr __user *uattr)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline void bpf_cgroup_storage_set(
|
|
struct bpf_cgroup_storage *storage[MAX_BPF_CGROUP_STORAGE_TYPE]) {}
|
|
static inline int bpf_cgroup_storage_assign(struct bpf_prog *prog,
|
|
struct bpf_map *map) { return 0; }
|
|
static inline void bpf_cgroup_storage_release(struct bpf_prog *prog,
|
|
struct bpf_map *map) {}
|
|
static inline struct bpf_cgroup_storage *bpf_cgroup_storage_alloc(
|
|
struct bpf_prog *prog, enum bpf_cgroup_storage_type stype) { return 0; }
|
|
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 (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_INET4_BIND(sk, uaddr) ({ 0; })
|
|
#define BPF_CGROUP_RUN_PROG_INET6_BIND(sk, uaddr) ({ 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) ({ 0; })
|
|
#define BPF_CGROUP_RUN_PROG_INET4_CONNECT_LOCK(sk, uaddr) ({ 0; })
|
|
#define BPF_CGROUP_RUN_PROG_INET6_CONNECT(sk, uaddr) ({ 0; })
|
|
#define BPF_CGROUP_RUN_PROG_INET6_CONNECT_LOCK(sk, uaddr) ({ 0; })
|
|
#define BPF_CGROUP_RUN_PROG_UDP4_SENDMSG_LOCK(sk, uaddr, t_ctx) ({ 0; })
|
|
#define BPF_CGROUP_RUN_PROG_UDP6_SENDMSG_LOCK(sk, uaddr, t_ctx) ({ 0; })
|
|
#define BPF_CGROUP_RUN_PROG_SOCK_OPS(sock_ops) ({ 0; })
|
|
#define BPF_CGROUP_RUN_PROG_DEVICE_CGROUP(type,major,minor,access) ({ 0; })
|
|
|
|
#define for_each_cgroup_storage_type(stype) for (; false; )
|
|
|
|
#endif /* CONFIG_CGROUP_BPF */
|
|
|
|
#endif /* _BPF_CGROUP_H */
|