/* 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 … static inline enum cgroup_bpf_attach_type to_cgroup_bpf_attach_type(enum bpf_attach_type attach_type) { … } #undef CGROUP_ATYPE extern struct static_key_false cgroup_bpf_enabled_key[MAX_CGROUP_BPF_ATTACH_TYPE]; #define cgroup_bpf_enabled(atype) … #define for_each_cgroup_storage_type(stype) … struct bpf_cgroup_storage_map; struct bpf_storage_buffer { … }; struct bpf_cgroup_storage { … }; struct bpf_cgroup_link { … }; struct bpf_prog_list { … }; 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) { … } 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) { … } /* Wrappers for __cgroup_bpf_run_filter_skb() guarded by cgroup_bpf_enabled. */ #define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk, skb) … #define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk, skb) … #define BPF_CGROUP_RUN_SK_PROG(sk, atype) … #define BPF_CGROUP_RUN_PROG_INET_SOCK(sk) … #define BPF_CGROUP_RUN_PROG_INET_SOCK_RELEASE(sk) … #define BPF_CGROUP_RUN_PROG_INET4_POST_BIND(sk) … #define BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk) … #define BPF_CGROUP_RUN_SA_PROG(sk, uaddr, uaddrlen, atype) … #define BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, atype, t_ctx) … /* 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) … #define BPF_CGROUP_PRE_CONNECT_ENABLED(sk) … #define BPF_CGROUP_RUN_PROG_INET4_CONNECT(sk, uaddr, uaddrlen) … #define BPF_CGROUP_RUN_PROG_INET6_CONNECT(sk, uaddr, uaddrlen) … #define BPF_CGROUP_RUN_PROG_INET4_CONNECT_LOCK(sk, uaddr, uaddrlen) … #define BPF_CGROUP_RUN_PROG_INET6_CONNECT_LOCK(sk, uaddr, uaddrlen) … #define BPF_CGROUP_RUN_PROG_UNIX_CONNECT_LOCK(sk, uaddr, uaddrlen) … #define BPF_CGROUP_RUN_PROG_UDP4_SENDMSG_LOCK(sk, uaddr, uaddrlen, t_ctx) … #define BPF_CGROUP_RUN_PROG_UDP6_SENDMSG_LOCK(sk, uaddr, uaddrlen, t_ctx) … #define BPF_CGROUP_RUN_PROG_UNIX_SENDMSG_LOCK(sk, uaddr, uaddrlen, t_ctx) … #define BPF_CGROUP_RUN_PROG_UDP4_RECVMSG_LOCK(sk, uaddr, uaddrlen) … #define BPF_CGROUP_RUN_PROG_UDP6_RECVMSG_LOCK(sk, uaddr, uaddrlen) … #define BPF_CGROUP_RUN_PROG_UNIX_RECVMSG_LOCK(sk, uaddr, uaddrlen) … /* 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) … #define BPF_CGROUP_RUN_PROG_SOCK_OPS(sock_ops) … #define BPF_CGROUP_RUN_PROG_DEVICE_CGROUP(atype, major, minor, access) … #define BPF_CGROUP_RUN_PROG_SYSCTL(head, table, write, buf, count, pos) … #define BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock, level, optname, optval, optlen, \ kernel_optval) … #define BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen) … #define BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock, level, optname, optval, optlen, \ max_optlen, retval) … #define BPF_CGROUP_RUN_PROG_GETSOCKOPT_KERN(sock, level, optname, optval, \ optlen, retval) … 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 … #define BPF_CGROUP_RUN_SA_PROG_LOCK … #define BPF_CGROUP_RUN_SA_PROG … #define BPF_CGROUP_PRE_CONNECT_ENABLED … #define BPF_CGROUP_RUN_PROG_INET_INGRESS … #define BPF_CGROUP_RUN_PROG_INET_EGRESS … #define BPF_CGROUP_RUN_PROG_INET_SOCK … #define BPF_CGROUP_RUN_PROG_INET_SOCK_RELEASE … #define BPF_CGROUP_RUN_PROG_INET_BIND_LOCK … #define BPF_CGROUP_RUN_PROG_INET4_POST_BIND … #define BPF_CGROUP_RUN_PROG_INET6_POST_BIND … #define BPF_CGROUP_RUN_PROG_INET4_CONNECT … #define BPF_CGROUP_RUN_PROG_INET4_CONNECT_LOCK … #define BPF_CGROUP_RUN_PROG_INET6_CONNECT … #define BPF_CGROUP_RUN_PROG_INET6_CONNECT_LOCK … #define BPF_CGROUP_RUN_PROG_UNIX_CONNECT_LOCK … #define BPF_CGROUP_RUN_PROG_UDP4_SENDMSG_LOCK … #define BPF_CGROUP_RUN_PROG_UDP6_SENDMSG_LOCK … #define BPF_CGROUP_RUN_PROG_UNIX_SENDMSG_LOCK … #define BPF_CGROUP_RUN_PROG_UDP4_RECVMSG_LOCK … #define BPF_CGROUP_RUN_PROG_UDP6_RECVMSG_LOCK … #define BPF_CGROUP_RUN_PROG_UNIX_RECVMSG_LOCK … #define BPF_CGROUP_RUN_PROG_SOCK_OPS … #define BPF_CGROUP_RUN_PROG_DEVICE_CGROUP … #define BPF_CGROUP_RUN_PROG_SYSCTL … #define BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN … #define BPF_CGROUP_RUN_PROG_GETSOCKOPT … #define BPF_CGROUP_RUN_PROG_GETSOCKOPT_KERN … #define BPF_CGROUP_RUN_PROG_SETSOCKOPT … #define for_each_cgroup_storage_type … #endif /* CONFIG_CGROUP_BPF */ #endif /* _BPF_CGROUP_H */
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