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/* 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/percpu-refcount.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; struct ctl_table; struct ctl_table_header; #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 inactive; /* reference counter used to detach bpf programs after cgroup removal / struct percpu_ref refcnt; / cgroup_bpf is released using a work queue / struct work_struct release_work; }; int cgroup_bpf_inherit(struct cgroup cgrp); void cgroup_bpf_offline(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); 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); int __cgroup_bpf_run_filter_sysctl(struct ctl_table_header head, struct ctl_table table, int write, void __user buf, size_t pcount, loff_t ppos, void *new_buf, enum bpf_attach_type type); int __cgroup_bpf_run_filter_setsockopt(struct sock sock, int level, int optname, char __user optval, int optlen, char *kernel_optval); int __cgroup_bpf_run_filter_getsockopt(struct sock sk, int level, int optname, char __user optval, int __user optlen, int max_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; } 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_UDP4_RECVMSG_LOCK(sk, uaddr) \ BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, BPF_CGROUP_UDP4_RECVMSG, NULL) #define BPF_CGROUP_RUN_PROG_UDP6_RECVMSG_LOCK(sk, uaddr) \ BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, BPF_CGROUP_UDP6_RECVMSG, NULL) #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; \ }) #define BPF_CGROUP_RUN_PROG_SYSCTL(head, table, write, buf, count, pos, nbuf) \ ({ \ int __ret = 0; \ if (cgroup_bpf_enabled) \ __ret = __cgroup_bpf_run_filter_sysctl(head, table, write, \ buf, count, pos, nbuf, \ BPF_CGROUP_SYSCTL); \ __ret; \ }) #define BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock, level, optname, optval, optlen, \ kernel_optval) \ ({ \ int __ret = 0; \ if (cgroup_bpf_enabled) \ __ret = __cgroup_bpf_run_filter_setsockopt(sock, level, \ optname, optval, \ optlen, \ kernel_optval); \ __ret; \ }) #define BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen) \ ({ \ int __ret = 0; \ if (cgroup_bpf_enabled) \ get_user(__ret, optlen); \ __ret; \ }) #define BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock, level, optname, optval, optlen, \ max_optlen, retval) \ ({ \ int __ret = retval; \ if (cgroup_bpf_enabled) \ __ret = __cgroup_bpf_run_filter_getsockopt(sock, level, \ optname, optval, \ optlen, max_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_prog_query(const union bpf_attr attr, union bpf_attr __user uattr); #else struct bpf_prog; struct cgroup_bpf {}; 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_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 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 (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_UDP4_RECVMSG_LOCK(sk, uaddr) ({ 0; }) #define BPF_CGROUP_RUN_PROG_UDP6_RECVMSG_LOCK(sk, uaddr) ({ 0; }) #define BPF_CGROUP_RUN_PROG_SOCK_OPS(sock_ops) ({ 0; }) #define BPF_CGROUP_RUN_PROG_DEVICE_CGROUP(type,major,minor,access) ({ 0; }) #define BPF_CGROUP_RUN_PROG_SYSCTL(head,table,write,buf,count,pos,nbuf) ({ 0; }) #define BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen) ({ 0; }) #define BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock, level, optname, optval, \ optlen, max_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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