include/linux/bpf-cgroup.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BPF_CGROUP_H
   3 #define _BPF_CGROUP_H
   4
   5 #include <linux/bpf.h>
   6 #include <linux/bpf-cgroup-defs.h>
   7 #include <linux/errno.h>
   8 #include <linux/jump_label.h>
   9 #include <linux/percpu.h>
  10 #include <linux/rbtree.h>
  11 #include <net/sock.h>
  12 #include <uapi/linux/bpf.h>
  13
  14 struct sock;
  15 struct sockaddr;
  16 struct cgroup;
  17 struct sk_buff;
  18 struct bpf_map;
  19 struct bpf_prog;
  20 struct bpf_sock_ops_kern;
  21 struct bpf_cgroup_storage;
  22 struct ctl_table;
  23 struct ctl_table_header;
  24 struct task_struct;
  25
  26 unsigned int __cgroup_bpf_run_lsm_sock(const void *ctx,
  27                                        const struct bpf_insn *insn);
  28 unsigned int __cgroup_bpf_run_lsm_socket(const void *ctx,
  29                                          const struct bpf_insn *insn);
  30 unsigned int __cgroup_bpf_run_lsm_current(const void *ctx,
  31                                           const struct bpf_insn *insn);
  32
  33 #ifdef CONFIG_CGROUP_BPF
  34
  35 #define CGROUP_ATYPE(type) \
  36         case BPF_##type: return type
  37
  38 static inline enum cgroup_bpf_attach_type
  39 to_cgroup_bpf_attach_type(enum bpf_attach_type attach_type)
  40 {
  41         switch (attach_type) {
  42         CGROUP_ATYPE(CGROUP_INET_INGRESS);
  43         CGROUP_ATYPE(CGROUP_INET_EGRESS);
  44         CGROUP_ATYPE(CGROUP_INET_SOCK_CREATE);
  45         CGROUP_ATYPE(CGROUP_SOCK_OPS);
  46         CGROUP_ATYPE(CGROUP_DEVICE);
  47         CGROUP_ATYPE(CGROUP_INET4_BIND);
  48         CGROUP_ATYPE(CGROUP_INET6_BIND);
  49         CGROUP_ATYPE(CGROUP_INET4_CONNECT);
  50         CGROUP_ATYPE(CGROUP_INET6_CONNECT);
  51         CGROUP_ATYPE(CGROUP_UNIX_CONNECT);
  52         CGROUP_ATYPE(CGROUP_INET4_POST_BIND);
  53         CGROUP_ATYPE(CGROUP_INET6_POST_BIND);
  54         CGROUP_ATYPE(CGROUP_UDP4_SENDMSG);
  55         CGROUP_ATYPE(CGROUP_UDP6_SENDMSG);
  56         CGROUP_ATYPE(CGROUP_UNIX_SENDMSG);
  57         CGROUP_ATYPE(CGROUP_SYSCTL);
  58         CGROUP_ATYPE(CGROUP_UDP4_RECVMSG);
  59         CGROUP_ATYPE(CGROUP_UDP6_RECVMSG);
  60         CGROUP_ATYPE(CGROUP_UNIX_RECVMSG);
  61         CGROUP_ATYPE(CGROUP_GETSOCKOPT);
  62         CGROUP_ATYPE(CGROUP_SETSOCKOPT);
  63         CGROUP_ATYPE(CGROUP_INET4_GETPEERNAME);
  64         CGROUP_ATYPE(CGROUP_INET6_GETPEERNAME);
  65         CGROUP_ATYPE(CGROUP_UNIX_GETPEERNAME);
  66         CGROUP_ATYPE(CGROUP_INET4_GETSOCKNAME);
  67         CGROUP_ATYPE(CGROUP_INET6_GETSOCKNAME);
  68         CGROUP_ATYPE(CGROUP_UNIX_GETSOCKNAME);
  69         CGROUP_ATYPE(CGROUP_INET_SOCK_RELEASE);
  70         default:
  71                 return CGROUP_BPF_ATTACH_TYPE_INVALID;
  72         }
  73 }
  74
  75 #undef CGROUP_ATYPE
  76
  77 extern struct static_key_false cgroup_bpf_enabled_key[MAX_CGROUP_BPF_ATTACH_TYPE];
  78 #define cgroup_bpf_enabled(atype) static_branch_unlikely(&cgroup_bpf_enabled_key[atype])
  79
  80 #define for_each_cgroup_storage_type(stype) \
  81         for (stype = 0; stype < MAX_BPF_CGROUP_STORAGE_TYPE; stype++)
  82
  83 struct bpf_cgroup_storage_map;
  84
  85 struct bpf_storage_buffer {
  86         struct rcu_head rcu;
  87         char data[];
  88 };
  89
  90 struct bpf_cgroup_storage {
  91         union {
  92                 struct bpf_storage_buffer *buf;
  93                 void __percpu *percpu_buf;
  94         };
  95         struct bpf_cgroup_storage_map *map;
  96         struct bpf_cgroup_storage_key key;
  97         struct list_head list_map;
  98         struct list_head list_cg;
  99         struct rb_node node;
 100         struct rcu_head rcu;
 101 };
 102
 103 struct bpf_cgroup_link {
 104         struct bpf_link link;
 105         struct cgroup *cgroup;
 106         enum bpf_attach_type type;
 107 };
 108
 109 struct bpf_prog_list {
 110         struct hlist_node node;
 111         struct bpf_prog *prog;
 112         struct bpf_cgroup_link *link;
 113         struct bpf_cgroup_storage *storage[MAX_BPF_CGROUP_STORAGE_TYPE];
 114 };
 115
 116 int cgroup_bpf_inherit(struct cgroup *cgrp);
 117 void cgroup_bpf_offline(struct cgroup *cgrp);
 118
 119 int __cgroup_bpf_run_filter_skb(struct sock *sk,
 120                                 struct sk_buff *skb,
 121                                 enum cgroup_bpf_attach_type atype);
 122
 123 int __cgroup_bpf_run_filter_sk(struct sock *sk,
 124                                enum cgroup_bpf_attach_type atype);
 125
 126 int __cgroup_bpf_run_filter_sock_addr(struct sock *sk,
 127                                       struct sockaddr *uaddr,
 128                                       int *uaddrlen,
 129                                       enum cgroup_bpf_attach_type atype,
 130                                       void *t_ctx,
 131                                       u32 *flags);
 132
 133 int __cgroup_bpf_run_filter_sock_ops(struct sock *sk,
 134                                      struct bpf_sock_ops_kern *sock_ops,
 135                                      enum cgroup_bpf_attach_type atype);
 136
 137 int __cgroup_bpf_check_dev_permission(short dev_type, u32 major, u32 minor,
 138                                       short access, enum cgroup_bpf_attach_type atype);
 139
 140 int __cgroup_bpf_run_filter_sysctl(struct ctl_table_header *head,
 141                                    struct ctl_table *table, int write,
 142                                    char **buf, size_t *pcount, loff_t *ppos,
 143                                    enum cgroup_bpf_attach_type atype);
 144
 145 int __cgroup_bpf_run_filter_setsockopt(struct sock *sock, int *level,
 146                                        int *optname, sockptr_t optval,
 147                                        int *optlen, char **kernel_optval);
 148
 149 int __cgroup_bpf_run_filter_getsockopt(struct sock *sk, int level,
 150                                        int optname, sockptr_t optval,
 151                                        sockptr_t optlen, int max_optlen,
 152                                        int retval);
 153
 154 int __cgroup_bpf_run_filter_getsockopt_kern(struct sock *sk, int level,
 155                                             int optname, void *optval,
 156                                             int *optlen, int retval);
 157
 158 static inline enum bpf_cgroup_storage_type cgroup_storage_type(
 159         struct bpf_map *map)
 160 {
 161         if (map->map_type == BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE)
 162                 return BPF_CGROUP_STORAGE_PERCPU;
 163
 164         return BPF_CGROUP_STORAGE_SHARED;
 165 }
 166
 167 struct bpf_cgroup_storage *
 168 cgroup_storage_lookup(struct bpf_cgroup_storage_map *map,
 169                       void *key, bool locked);
 170 struct bpf_cgroup_storage *bpf_cgroup_storage_alloc(struct bpf_prog *prog,
 171                                         enum bpf_cgroup_storage_type stype);
 172 void bpf_cgroup_storage_free(struct bpf_cgroup_storage *storage);
 173 void bpf_cgroup_storage_link(struct bpf_cgroup_storage *storage,
 174                              struct cgroup *cgroup,
 175                              enum bpf_attach_type type);
 176 void bpf_cgroup_storage_unlink(struct bpf_cgroup_storage *storage);
 177 int bpf_cgroup_storage_assign(struct bpf_prog_aux *aux, struct bpf_map *map);
 178
 179 int bpf_percpu_cgroup_storage_copy(struct bpf_map *map, void *key, void *value);
 180 int bpf_percpu_cgroup_storage_update(struct bpf_map *map, void *key,
 181                                      void *value, u64 flags);
 182
 183 /* Opportunistic check to see whether we have any BPF program attached*/
 184 static inline bool cgroup_bpf_sock_enabled(struct sock *sk,
 185                                            enum cgroup_bpf_attach_type type)
 186 {
 187         struct cgroup *cgrp = sock_cgroup_ptr(&sk->sk_cgrp_data);
 188         struct bpf_prog_array *array;
 189
 190         array = rcu_access_pointer(cgrp->bpf.effective[type]);
 191         return array != &bpf_empty_prog_array.hdr;
 192 }
 193
 194 /* Wrappers for __cgroup_bpf_run_filter_skb() guarded by cgroup_bpf_enabled. */
 195 #define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk, skb)                             \
 196 ({                                                                            \
 197         int __ret = 0;                                                        \
 198         if (cgroup_bpf_enabled(CGROUP_INET_INGRESS) &&                        \
 199             cgroup_bpf_sock_enabled(sk, CGROUP_INET_INGRESS))                 \
 200                 __ret = __cgroup_bpf_run_filter_skb(sk, skb,                  \
 201                                                     CGROUP_INET_INGRESS); \
 202                                                                               \
 203         __ret;                                                                \
 204 })
 205
 206 #define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk, skb)                               \
 207 ({                                                                             \
 208         int __ret = 0;                                                         \
 209         if (cgroup_bpf_enabled(CGROUP_INET_EGRESS) && sk) {                    \
 210                 typeof(sk) __sk = sk_to_full_sk(sk);                           \
 211                 if (sk_fullsock(__sk) && __sk == skb_to_full_sk(skb) &&        \
 212                     cgroup_bpf_sock_enabled(__sk, CGROUP_INET_EGRESS))         \
 213                         __ret = __cgroup_bpf_run_filter_skb(__sk, skb,         \
 214                                                       CGROUP_INET_EGRESS); \
 215         }                                                                      \
 216         __ret;                                                                 \
 217 })
 218
 219 #define BPF_CGROUP_RUN_SK_PROG(sk, atype)                                      \
 220 ({                                                                             \
 221         int __ret = 0;                                                         \
 222         if (cgroup_bpf_enabled(atype)) {                                               \
 223                 __ret = __cgroup_bpf_run_filter_sk(sk, atype);                 \
 224         }                                                                      \
 225         __ret;                                                                 \
 226 })
 227
 228 #define BPF_CGROUP_RUN_PROG_INET_SOCK(sk)                                      \
 229         BPF_CGROUP_RUN_SK_PROG(sk, CGROUP_INET_SOCK_CREATE)
 230
 231 #define BPF_CGROUP_RUN_PROG_INET_SOCK_RELEASE(sk)                              \
 232         BPF_CGROUP_RUN_SK_PROG(sk, CGROUP_INET_SOCK_RELEASE)
 233
 234 #define BPF_CGROUP_RUN_PROG_INET4_POST_BIND(sk)                                \
 235         BPF_CGROUP_RUN_SK_PROG(sk, CGROUP_INET4_POST_BIND)
 236
 237 #define BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk)                                \
 238         BPF_CGROUP_RUN_SK_PROG(sk, CGROUP_INET6_POST_BIND)
 239
 240 #define BPF_CGROUP_RUN_SA_PROG(sk, uaddr, uaddrlen, atype)                     \
 241 ({                                                                             \
 242         int __ret = 0;                                                         \
 243         if (cgroup_bpf_enabled(atype))                                         \
 244                 __ret = __cgroup_bpf_run_filter_sock_addr(sk, uaddr, uaddrlen, \
 245                                                           atype, NULL, NULL);  \
 246         __ret;                                                                 \
 247 })
 248
 249 #define BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, atype, t_ctx)         \
 250 ({                                                                             \
 251         int __ret = 0;                                                         \
 252         if (cgroup_bpf_enabled(atype))  {                                      \
 253                 lock_sock(sk);                                                 \
 254                 __ret = __cgroup_bpf_run_filter_sock_addr(sk, uaddr, uaddrlen, \
 255                                                           atype, t_ctx, NULL); \
 256                 release_sock(sk);                                              \
 257         }                                                                      \
 258         __ret;                                                                 \
 259 })
 260
 261 /* BPF_CGROUP_INET4_BIND and BPF_CGROUP_INET6_BIND can return extra flags
 262  * via upper bits of return code. The only flag that is supported
 263  * (at bit position 0) is to indicate CAP_NET_BIND_SERVICE capability check
 264  * should be bypassed (BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE).
 265  */
 266 #define BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr, uaddrlen, atype, bind_flags) \
 267 ({                                                                             \
 268         u32 __flags = 0;                                                       \
 269         int __ret = 0;                                                         \
 270         if (cgroup_bpf_enabled(atype))  {                                      \
 271                 lock_sock(sk);                                                 \
 272                 __ret = __cgroup_bpf_run_filter_sock_addr(sk, uaddr, uaddrlen, \
 273                                                           atype, NULL, &__flags); \
 274                 release_sock(sk);                                              \
 275                 if (__flags & BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE)            \
 276                         *bind_flags |= BIND_NO_CAP_NET_BIND_SERVICE;           \
 277         }                                                                      \
 278         __ret;                                                                 \
 279 })
 280
 281 #define BPF_CGROUP_PRE_CONNECT_ENABLED(sk)                                     \
 282         ((cgroup_bpf_enabled(CGROUP_INET4_CONNECT) ||                  \
 283           cgroup_bpf_enabled(CGROUP_INET6_CONNECT)) &&                 \
 284          (sk)->sk_prot->pre_connect)
 285
 286 #define BPF_CGROUP_RUN_PROG_INET4_CONNECT(sk, uaddr, uaddrlen)                  \
 287         BPF_CGROUP_RUN_SA_PROG(sk, uaddr, uaddrlen, CGROUP_INET4_CONNECT)
 288
 289 #define BPF_CGROUP_RUN_PROG_INET6_CONNECT(sk, uaddr, uaddrlen)                  \
 290         BPF_CGROUP_RUN_SA_PROG(sk, uaddr, uaddrlen, CGROUP_INET6_CONNECT)
 291
 292 #define BPF_CGROUP_RUN_PROG_INET4_CONNECT_LOCK(sk, uaddr, uaddrlen)             \
 293         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, CGROUP_INET4_CONNECT, NULL)
 294
 295 #define BPF_CGROUP_RUN_PROG_INET6_CONNECT_LOCK(sk, uaddr, uaddrlen)             \
 296         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, CGROUP_INET6_CONNECT, NULL)
 297
 298 #define BPF_CGROUP_RUN_PROG_UNIX_CONNECT_LOCK(sk, uaddr, uaddrlen)              \
 299         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, CGROUP_UNIX_CONNECT, NULL)
 300
 301 #define BPF_CGROUP_RUN_PROG_UDP4_SENDMSG_LOCK(sk, uaddr, uaddrlen, t_ctx)       \
 302         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, CGROUP_UDP4_SENDMSG, t_ctx)
 303
 304 #define BPF_CGROUP_RUN_PROG_UDP6_SENDMSG_LOCK(sk, uaddr, uaddrlen, t_ctx)       \
 305         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, CGROUP_UDP6_SENDMSG, t_ctx)
 306
 307 #define BPF_CGROUP_RUN_PROG_UNIX_SENDMSG_LOCK(sk, uaddr, uaddrlen, t_ctx)       \
 308         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, CGROUP_UNIX_SENDMSG, t_ctx)
 309
 310 #define BPF_CGROUP_RUN_PROG_UDP4_RECVMSG_LOCK(sk, uaddr, uaddrlen)              \
 311         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, CGROUP_UDP4_RECVMSG, NULL)
 312
 313 #define BPF_CGROUP_RUN_PROG_UDP6_RECVMSG_LOCK(sk, uaddr, uaddrlen)              \
 314         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, CGROUP_UDP6_RECVMSG, NULL)
 315
 316 #define BPF_CGROUP_RUN_PROG_UNIX_RECVMSG_LOCK(sk, uaddr, uaddrlen)              \
 317         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, CGROUP_UNIX_RECVMSG, NULL)
 318
 319 /* The SOCK_OPS"_SK" macro should be used when sock_ops->sk is not a
 320  * fullsock and its parent fullsock cannot be traced by
 321  * sk_to_full_sk().
 322  *
 323  * e.g. sock_ops->sk is a request_sock and it is under syncookie mode.
 324  * Its listener-sk is not attached to the rsk_listener.
 325  * In this case, the caller holds the listener-sk (unlocked),
 326  * set its sock_ops->sk to req_sk, and call this SOCK_OPS"_SK" with
 327  * the listener-sk such that the cgroup-bpf-progs of the
 328  * listener-sk will be run.
 329  *
 330  * Regardless of syncookie mode or not,
 331  * calling bpf_setsockopt on listener-sk will not make sense anyway,
 332  * so passing 'sock_ops->sk == req_sk' to the bpf prog is appropriate here.
 333  */
 334 #define BPF_CGROUP_RUN_PROG_SOCK_OPS_SK(sock_ops, sk)                   \
 335 ({                                                                      \
 336         int __ret = 0;                                                  \
 337         if (cgroup_bpf_enabled(CGROUP_SOCK_OPS))                        \
 338                 __ret = __cgroup_bpf_run_filter_sock_ops(sk,            \
 339                                                          sock_ops,      \
 340                                                          CGROUP_SOCK_OPS); \
 341         __ret;                                                          \
 342 })
 343
 344 #define BPF_CGROUP_RUN_PROG_SOCK_OPS(sock_ops)                                 \
 345 ({                                                                             \
 346         int __ret = 0;                                                         \
 347         if (cgroup_bpf_enabled(CGROUP_SOCK_OPS) && (sock_ops)->sk) {       \
 348                 typeof(sk) __sk = sk_to_full_sk((sock_ops)->sk);               \
 349                 if (__sk && sk_fullsock(__sk))                                 \
 350                         __ret = __cgroup_bpf_run_filter_sock_ops(__sk,         \
 351                                                                  sock_ops,     \
 352                                                          CGROUP_SOCK_OPS); \
 353         }                                                                      \
 354         __ret;                                                                 \
 355 })
 356
 357 #define BPF_CGROUP_RUN_PROG_DEVICE_CGROUP(atype, major, minor, access)        \
 358 ({                                                                            \
 359         int __ret = 0;                                                        \
 360         if (cgroup_bpf_enabled(CGROUP_DEVICE))                        \
 361                 __ret = __cgroup_bpf_check_dev_permission(atype, major, minor, \
 362                                                           access,             \
 363                                                           CGROUP_DEVICE); \
 364                                                                               \
 365         __ret;                                                                \
 366 })
 367
 368
 369 #define BPF_CGROUP_RUN_PROG_SYSCTL(head, table, write, buf, count, pos)  \
 370 ({                                                                             \
 371         int __ret = 0;                                                         \
 372         if (cgroup_bpf_enabled(CGROUP_SYSCTL))                         \
 373                 __ret = __cgroup_bpf_run_filter_sysctl(head, table, write,     \
 374                                                        buf, count, pos,        \
 375                                                        CGROUP_SYSCTL);     \
 376         __ret;                                                                 \
 377 })
 378
 379 #define BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock, level, optname, optval, optlen,   \
 380                                        kernel_optval)                          \
 381 ({                                                                             \
 382         int __ret = 0;                                                         \
 383         if (cgroup_bpf_enabled(CGROUP_SETSOCKOPT) &&                           \
 384             cgroup_bpf_sock_enabled(sock, CGROUP_SETSOCKOPT))                  \
 385                 __ret = __cgroup_bpf_run_filter_setsockopt(sock, level,        \
 386                                                            optname, optval,    \
 387                                                            optlen,             \
 388                                                            kernel_optval);     \
 389         __ret;                                                                 \
 390 })
 391
 392 #define BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen)                               \
 393 ({                                                                             \
 394         int __ret = 0;                                                         \
 395         if (cgroup_bpf_enabled(CGROUP_GETSOCKOPT))                             \
 396                 copy_from_sockptr(&__ret, optlen, sizeof(int));                \
 397         __ret;                                                                 \
 398 })
 399
 400 #define BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock, level, optname, optval, optlen,   \
 401                                        max_optlen, retval)                     \
 402 ({                                                                             \
 403         int __ret = retval;                                                    \
 404         if (cgroup_bpf_enabled(CGROUP_GETSOCKOPT) &&                           \
 405             cgroup_bpf_sock_enabled(sock, CGROUP_GETSOCKOPT))                  \
 406                 if (!(sock)->sk_prot->bpf_bypass_getsockopt ||                 \
 407                     !INDIRECT_CALL_INET_1((sock)->sk_prot->bpf_bypass_getsockopt, \
 408                                         tcp_bpf_bypass_getsockopt,             \
 409                                         level, optname))                       \
 410                         __ret = __cgroup_bpf_run_filter_getsockopt(            \
 411                                 sock, level, optname, optval, optlen,          \
 412                                 max_optlen, retval);                           \
 413         __ret;                                                                 \
 414 })
 415
 416 #define BPF_CGROUP_RUN_PROG_GETSOCKOPT_KERN(sock, level, optname, optval,      \
 417                                             optlen, retval)                    \
 418 ({                                                                             \
 419         int __ret = retval;                                                    \
 420         if (cgroup_bpf_enabled(CGROUP_GETSOCKOPT))                             \
 421                 __ret = __cgroup_bpf_run_filter_getsockopt_kern(               \
 422                         sock, level, optname, optval, optlen, retval);         \
 423         __ret;                                                                 \
 424 })
 425
 426 int cgroup_bpf_prog_attach(const union bpf_attr *attr,
 427                            enum bpf_prog_type ptype, struct bpf_prog *prog);
 428 int cgroup_bpf_prog_detach(const union bpf_attr *attr,
 429                            enum bpf_prog_type ptype);
 430 int cgroup_bpf_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
 431 int cgroup_bpf_prog_query(const union bpf_attr *attr,
 432                           union bpf_attr __user *uattr);
 433
 434 const struct bpf_func_proto *
 435 cgroup_common_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog);
 436 const struct bpf_func_proto *
 437 cgroup_current_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog);
 438 #else
 439
 440 static inline int cgroup_bpf_inherit(struct cgroup *cgrp) { return 0; }
 441 static inline void cgroup_bpf_offline(struct cgroup *cgrp) {}
 442
 443 static inline int cgroup_bpf_prog_attach(const union bpf_attr *attr,
 444                                          enum bpf_prog_type ptype,
 445                                          struct bpf_prog *prog)
 446 {
 447         return -EINVAL;
 448 }
 449
 450 static inline int cgroup_bpf_prog_detach(const union bpf_attr *attr,
 451                                          enum bpf_prog_type ptype)
 452 {
 453         return -EINVAL;
 454 }
 455
 456 static inline int cgroup_bpf_link_attach(const union bpf_attr *attr,
 457                                          struct bpf_prog *prog)
 458 {
 459         return -EINVAL;
 460 }
 461
 462 static inline int cgroup_bpf_prog_query(const union bpf_attr *attr,
 463                                         union bpf_attr __user *uattr)
 464 {
 465         return -EINVAL;
 466 }
 467
 468 static inline const struct bpf_func_proto *
 469 cgroup_common_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
 470 {
 471         return NULL;
 472 }
 473
 474 static inline const struct bpf_func_proto *
 475 cgroup_current_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
 476 {
 477         return NULL;
 478 }
 479
 480 static inline int bpf_cgroup_storage_assign(struct bpf_prog_aux *aux,
 481                                             struct bpf_map *map) { return 0; }
 482 static inline struct bpf_cgroup_storage *bpf_cgroup_storage_alloc(
 483         struct bpf_prog *prog, enum bpf_cgroup_storage_type stype) { return NULL; }
 484 static inline void bpf_cgroup_storage_free(
 485         struct bpf_cgroup_storage *storage) {}
 486 static inline int bpf_percpu_cgroup_storage_copy(struct bpf_map *map, void *key,
 487                                                  void *value) {
 488         return 0;
 489 }
 490 static inline int bpf_percpu_cgroup_storage_update(struct bpf_map *map,
 491                                         void *key, void *value, u64 flags) {
 492         return 0;
 493 }
 494
 495 #define cgroup_bpf_enabled(atype) (0)
 496 #define BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, uaddrlen, atype, t_ctx) ({ 0; })
 497 #define BPF_CGROUP_RUN_SA_PROG(sk, uaddr, uaddrlen, atype) ({ 0; })
 498 #define BPF_CGROUP_PRE_CONNECT_ENABLED(sk) (0)
 499 #define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk,skb) ({ 0; })
 500 #define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk,skb) ({ 0; })
 501 #define BPF_CGROUP_RUN_PROG_INET_SOCK(sk) ({ 0; })
 502 #define BPF_CGROUP_RUN_PROG_INET_SOCK_RELEASE(sk) ({ 0; })
 503 #define BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr, uaddrlen, atype, flags) ({ 0; })
 504 #define BPF_CGROUP_RUN_PROG_INET4_POST_BIND(sk) ({ 0; })
 505 #define BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk) ({ 0; })
 506 #define BPF_CGROUP_RUN_PROG_INET4_CONNECT(sk, uaddr, uaddrlen) ({ 0; })
 507 #define BPF_CGROUP_RUN_PROG_INET4_CONNECT_LOCK(sk, uaddr, uaddrlen) ({ 0; })
 508 #define BPF_CGROUP_RUN_PROG_INET6_CONNECT(sk, uaddr, uaddrlen) ({ 0; })
 509 #define BPF_CGROUP_RUN_PROG_INET6_CONNECT_LOCK(sk, uaddr, uaddrlen) ({ 0; })
 510 #define BPF_CGROUP_RUN_PROG_UNIX_CONNECT_LOCK(sk, uaddr, uaddrlen) ({ 0; })
 511 #define BPF_CGROUP_RUN_PROG_UDP4_SENDMSG_LOCK(sk, uaddr, uaddrlen, t_ctx) ({ 0; })
 512 #define BPF_CGROUP_RUN_PROG_UDP6_SENDMSG_LOCK(sk, uaddr, uaddrlen, t_ctx) ({ 0; })
 513 #define BPF_CGROUP_RUN_PROG_UNIX_SENDMSG_LOCK(sk, uaddr, uaddrlen, t_ctx) ({ 0; })
 514 #define BPF_CGROUP_RUN_PROG_UDP4_RECVMSG_LOCK(sk, uaddr, uaddrlen) ({ 0; })
 515 #define BPF_CGROUP_RUN_PROG_UDP6_RECVMSG_LOCK(sk, uaddr, uaddrlen) ({ 0; })
 516 #define BPF_CGROUP_RUN_PROG_UNIX_RECVMSG_LOCK(sk, uaddr, uaddrlen) ({ 0; })
 517 #define BPF_CGROUP_RUN_PROG_SOCK_OPS(sock_ops) ({ 0; })
 518 #define BPF_CGROUP_RUN_PROG_DEVICE_CGROUP(atype, major, minor, access) ({ 0; })
 519 #define BPF_CGROUP_RUN_PROG_SYSCTL(head,table,write,buf,count,pos) ({ 0; })
 520 #define BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen) ({ 0; })
 521 #define BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock, level, optname, optval, \
 522                                        optlen, max_optlen, retval) ({ retval; })
 523 #define BPF_CGROUP_RUN_PROG_GETSOCKOPT_KERN(sock, level, optname, optval, \
 524                                             optlen, retval) ({ retval; })
 525 #define BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock, level, optname, optval, optlen, \
 526                                        kernel_optval) ({ 0; })
 527
 528 #define for_each_cgroup_storage_type(stype) for (; false; )
 529
 530 #endif /* CONFIG_CGROUP_BPF */
 531
 532 #endif /* _BPF_CGROUP_H */