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/errno.h>
   7 #include <linux/jump_label.h>
   8 #include <linux/percpu.h>
   9 #include <linux/percpu-refcount.h>
  10 #include <linux/rbtree.h>
  11 #include <uapi/linux/bpf.h>
  12
  13 struct sock;
  14 struct sockaddr;
  15 struct cgroup;
  16 struct sk_buff;
  17 struct bpf_map;
  18 struct bpf_prog;
  19 struct bpf_sock_ops_kern;
  20 struct bpf_cgroup_storage;
  21 struct ctl_table;
  22 struct ctl_table_header;
  23 struct task_struct;
  24
  25 #ifdef CONFIG_CGROUP_BPF
  26 enum cgroup_bpf_attach_type {
  27         CGROUP_BPF_ATTACH_TYPE_INVALID = -1,
  28         CGROUP_INET_INGRESS = 0,
  29         CGROUP_INET_EGRESS,
  30         CGROUP_INET_SOCK_CREATE,
  31         CGROUP_SOCK_OPS,
  32         CGROUP_DEVICE,
  33         CGROUP_INET4_BIND,
  34         CGROUP_INET6_BIND,
  35         CGROUP_INET4_CONNECT,
  36         CGROUP_INET6_CONNECT,
  37         CGROUP_INET4_POST_BIND,
  38         CGROUP_INET6_POST_BIND,
  39         CGROUP_UDP4_SENDMSG,
  40         CGROUP_UDP6_SENDMSG,
  41         CGROUP_SYSCTL,
  42         CGROUP_UDP4_RECVMSG,
  43         CGROUP_UDP6_RECVMSG,
  44         CGROUP_GETSOCKOPT,
  45         CGROUP_SETSOCKOPT,
  46         CGROUP_INET4_GETPEERNAME,
  47         CGROUP_INET6_GETPEERNAME,
  48         CGROUP_INET4_GETSOCKNAME,
  49         CGROUP_INET6_GETSOCKNAME,
  50         CGROUP_INET_SOCK_RELEASE,
  51         MAX_CGROUP_BPF_ATTACH_TYPE
  52 };
  53
  54 #define CGROUP_ATYPE(type) \
  55         case BPF_##type: return type
  56
  57 static inline enum cgroup_bpf_attach_type
  58 to_cgroup_bpf_attach_type(enum bpf_attach_type attach_type)
  59 {
  60         switch (attach_type) {
  61         CGROUP_ATYPE(CGROUP_INET_INGRESS);
  62         CGROUP_ATYPE(CGROUP_INET_EGRESS);
  63         CGROUP_ATYPE(CGROUP_INET_SOCK_CREATE);
  64         CGROUP_ATYPE(CGROUP_SOCK_OPS);
  65         CGROUP_ATYPE(CGROUP_DEVICE);
  66         CGROUP_ATYPE(CGROUP_INET4_BIND);
  67         CGROUP_ATYPE(CGROUP_INET6_BIND);
  68         CGROUP_ATYPE(CGROUP_INET4_CONNECT);
  69         CGROUP_ATYPE(CGROUP_INET6_CONNECT);
  70         CGROUP_ATYPE(CGROUP_INET4_POST_BIND);
  71         CGROUP_ATYPE(CGROUP_INET6_POST_BIND);
  72         CGROUP_ATYPE(CGROUP_UDP4_SENDMSG);
  73         CGROUP_ATYPE(CGROUP_UDP6_SENDMSG);
  74         CGROUP_ATYPE(CGROUP_SYSCTL);
  75         CGROUP_ATYPE(CGROUP_UDP4_RECVMSG);
  76         CGROUP_ATYPE(CGROUP_UDP6_RECVMSG);
  77         CGROUP_ATYPE(CGROUP_GETSOCKOPT);
  78         CGROUP_ATYPE(CGROUP_SETSOCKOPT);
  79         CGROUP_ATYPE(CGROUP_INET4_GETPEERNAME);
  80         CGROUP_ATYPE(CGROUP_INET6_GETPEERNAME);
  81         CGROUP_ATYPE(CGROUP_INET4_GETSOCKNAME);
  82         CGROUP_ATYPE(CGROUP_INET6_GETSOCKNAME);
  83         CGROUP_ATYPE(CGROUP_INET_SOCK_RELEASE);
  84         default:
  85                 return CGROUP_BPF_ATTACH_TYPE_INVALID;
  86         }
  87 }
  88
  89 #undef CGROUP_ATYPE
  90
  91 extern struct static_key_false cgroup_bpf_enabled_key[MAX_CGROUP_BPF_ATTACH_TYPE];
  92 #define cgroup_bpf_enabled(atype) static_branch_unlikely(&cgroup_bpf_enabled_key[atype])
  93
  94 #define for_each_cgroup_storage_type(stype) \
  95         for (stype = 0; stype < MAX_BPF_CGROUP_STORAGE_TYPE; stype++)
  96
  97 struct bpf_cgroup_storage_map;
  98
  99 struct bpf_storage_buffer {
 100         struct rcu_head rcu;
 101         char data[];
 102 };
 103
 104 struct bpf_cgroup_storage {
 105         union {
 106                 struct bpf_storage_buffer *buf;
 107                 void __percpu *percpu_buf;
 108         };
 109         struct bpf_cgroup_storage_map *map;
 110         struct bpf_cgroup_storage_key key;
 111         struct list_head list_map;
 112         struct list_head list_cg;
 113         struct rb_node node;
 114         struct rcu_head rcu;
 115 };
 116
 117 struct bpf_cgroup_link {
 118         struct bpf_link link;
 119         struct cgroup *cgroup;
 120         enum bpf_attach_type type;
 121 };
 122
 123 struct bpf_prog_list {
 124         struct list_head node;
 125         struct bpf_prog *prog;
 126         struct bpf_cgroup_link *link;
 127         struct bpf_cgroup_storage *storage[MAX_BPF_CGROUP_STORAGE_TYPE];
 128 };
 129
 130 struct bpf_prog_array;
 131
 132 struct cgroup_bpf {
 133         /* array of effective progs in this cgroup */
 134         struct bpf_prog_array __rcu *effective[MAX_CGROUP_BPF_ATTACH_TYPE];
 135
 136         /* attached progs to this cgroup and attach flags
 137          * when flags == 0 or BPF_F_ALLOW_OVERRIDE the progs list will
 138          * have either zero or one element
 139          * when BPF_F_ALLOW_MULTI the list can have up to BPF_CGROUP_MAX_PROGS
 140          */
 141         struct list_head progs[MAX_CGROUP_BPF_ATTACH_TYPE];
 142         u32 flags[MAX_CGROUP_BPF_ATTACH_TYPE];
 143
 144         /* list of cgroup shared storages */
 145         struct list_head storages;
 146
 147         /* temp storage for effective prog array used by prog_attach/detach */
 148         struct bpf_prog_array *inactive;
 149
 150         /* reference counter used to detach bpf programs after cgroup removal */
 151         struct percpu_ref refcnt;
 152
 153         /* cgroup_bpf is released using a work queue */
 154         struct work_struct release_work;
 155 };
 156
 157 int cgroup_bpf_inherit(struct cgroup *cgrp);
 158 void cgroup_bpf_offline(struct cgroup *cgrp);
 159
 160 int __cgroup_bpf_attach(struct cgroup *cgrp,
 161                         struct bpf_prog *prog, struct bpf_prog *replace_prog,
 162                         struct bpf_cgroup_link *link,
 163                         enum bpf_attach_type type, u32 flags);
 164 int __cgroup_bpf_detach(struct cgroup *cgrp, struct bpf_prog *prog,
 165                         struct bpf_cgroup_link *link,
 166                         enum bpf_attach_type type);
 167 int __cgroup_bpf_query(struct cgroup *cgrp, const union bpf_attr *attr,
 168                        union bpf_attr __user *uattr);
 169
 170 /* Wrapper for __cgroup_bpf_*() protected by cgroup_mutex */
 171 int cgroup_bpf_attach(struct cgroup *cgrp,
 172                       struct bpf_prog *prog, struct bpf_prog *replace_prog,
 173                       struct bpf_cgroup_link *link, enum bpf_attach_type type,
 174                       u32 flags);
 175 int cgroup_bpf_detach(struct cgroup *cgrp, struct bpf_prog *prog,
 176                       enum bpf_attach_type type);
 177 int cgroup_bpf_query(struct cgroup *cgrp, const union bpf_attr *attr,
 178                      union bpf_attr __user *uattr);
 179
 180 int __cgroup_bpf_run_filter_skb(struct sock *sk,
 181                                 struct sk_buff *skb,
 182                                 enum cgroup_bpf_attach_type atype);
 183
 184 int __cgroup_bpf_run_filter_sk(struct sock *sk,
 185                                enum cgroup_bpf_attach_type atype);
 186
 187 int __cgroup_bpf_run_filter_sock_addr(struct sock *sk,
 188                                       struct sockaddr *uaddr,
 189                                       enum cgroup_bpf_attach_type atype,
 190                                       void *t_ctx,
 191                                       u32 *flags);
 192
 193 int __cgroup_bpf_run_filter_sock_ops(struct sock *sk,
 194                                      struct bpf_sock_ops_kern *sock_ops,
 195                                      enum cgroup_bpf_attach_type atype);
 196
 197 int __cgroup_bpf_check_dev_permission(short dev_type, u32 major, u32 minor,
 198                                       short access, enum cgroup_bpf_attach_type atype);
 199
 200 int __cgroup_bpf_run_filter_sysctl(struct ctl_table_header *head,
 201                                    struct ctl_table *table, int write,
 202                                    char **buf, size_t *pcount, loff_t *ppos,
 203                                    enum cgroup_bpf_attach_type atype);
 204
 205 int __cgroup_bpf_run_filter_setsockopt(struct sock *sock, int *level,
 206                                        int *optname, char __user *optval,
 207                                        int *optlen, char **kernel_optval);
 208 int __cgroup_bpf_run_filter_getsockopt(struct sock *sk, int level,
 209                                        int optname, char __user *optval,
 210                                        int __user *optlen, int max_optlen,
 211                                        int retval);
 212
 213 int __cgroup_bpf_run_filter_getsockopt_kern(struct sock *sk, int level,
 214                                             int optname, void *optval,
 215                                             int *optlen, int retval);
 216
 217 static inline enum bpf_cgroup_storage_type cgroup_storage_type(
 218         struct bpf_map *map)
 219 {
 220         if (map->map_type == BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE)
 221                 return BPF_CGROUP_STORAGE_PERCPU;
 222
 223         return BPF_CGROUP_STORAGE_SHARED;
 224 }
 225
 226 struct bpf_cgroup_storage *
 227 cgroup_storage_lookup(struct bpf_cgroup_storage_map *map,
 228                       void *key, bool locked);
 229 struct bpf_cgroup_storage *bpf_cgroup_storage_alloc(struct bpf_prog *prog,
 230                                         enum bpf_cgroup_storage_type stype);
 231 void bpf_cgroup_storage_free(struct bpf_cgroup_storage *storage);
 232 void bpf_cgroup_storage_link(struct bpf_cgroup_storage *storage,
 233                              struct cgroup *cgroup,
 234                              enum bpf_attach_type type);
 235 void bpf_cgroup_storage_unlink(struct bpf_cgroup_storage *storage);
 236 int bpf_cgroup_storage_assign(struct bpf_prog_aux *aux, struct bpf_map *map);
 237
 238 int bpf_percpu_cgroup_storage_copy(struct bpf_map *map, void *key, void *value);
 239 int bpf_percpu_cgroup_storage_update(struct bpf_map *map, void *key,
 240                                      void *value, u64 flags);
 241
 242 /* Wrappers for __cgroup_bpf_run_filter_skb() guarded by cgroup_bpf_enabled. */
 243 #define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk, skb)                             \
 244 ({                                                                            \
 245         int __ret = 0;                                                        \
 246         if (cgroup_bpf_enabled(CGROUP_INET_INGRESS))                  \
 247                 __ret = __cgroup_bpf_run_filter_skb(sk, skb,                  \
 248                                                     CGROUP_INET_INGRESS); \
 249                                                                               \
 250         __ret;                                                                \
 251 })
 252
 253 #define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk, skb)                               \
 254 ({                                                                             \
 255         int __ret = 0;                                                         \
 256         if (cgroup_bpf_enabled(CGROUP_INET_EGRESS) && sk && sk == skb->sk) { \
 257                 typeof(sk) __sk = sk_to_full_sk(sk);                           \
 258                 if (sk_fullsock(__sk))                                         \
 259                         __ret = __cgroup_bpf_run_filter_skb(__sk, skb,         \
 260                                                       CGROUP_INET_EGRESS); \
 261         }                                                                      \
 262         __ret;                                                                 \
 263 })
 264
 265 #define BPF_CGROUP_RUN_SK_PROG(sk, atype)                                      \
 266 ({                                                                             \
 267         int __ret = 0;                                                         \
 268         if (cgroup_bpf_enabled(atype)) {                                               \
 269                 __ret = __cgroup_bpf_run_filter_sk(sk, atype);                 \
 270         }                                                                      \
 271         __ret;                                                                 \
 272 })
 273
 274 #define BPF_CGROUP_RUN_PROG_INET_SOCK(sk)                                      \
 275         BPF_CGROUP_RUN_SK_PROG(sk, CGROUP_INET_SOCK_CREATE)
 276
 277 #define BPF_CGROUP_RUN_PROG_INET_SOCK_RELEASE(sk)                              \
 278         BPF_CGROUP_RUN_SK_PROG(sk, CGROUP_INET_SOCK_RELEASE)
 279
 280 #define BPF_CGROUP_RUN_PROG_INET4_POST_BIND(sk)                                \
 281         BPF_CGROUP_RUN_SK_PROG(sk, CGROUP_INET4_POST_BIND)
 282
 283 #define BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk)                                \
 284         BPF_CGROUP_RUN_SK_PROG(sk, CGROUP_INET6_POST_BIND)
 285
 286 #define BPF_CGROUP_RUN_SA_PROG(sk, uaddr, atype)                                       \
 287 ({                                                                             \
 288         u32 __unused_flags;                                                    \
 289         int __ret = 0;                                                         \
 290         if (cgroup_bpf_enabled(atype))                                         \
 291                 __ret = __cgroup_bpf_run_filter_sock_addr(sk, uaddr, atype,     \
 292                                                           NULL,                \
 293                                                           &__unused_flags);    \
 294         __ret;                                                                 \
 295 })
 296
 297 #define BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, atype, t_ctx)                   \
 298 ({                                                                             \
 299         u32 __unused_flags;                                                    \
 300         int __ret = 0;                                                         \
 301         if (cgroup_bpf_enabled(atype))  {                                      \
 302                 lock_sock(sk);                                                 \
 303                 __ret = __cgroup_bpf_run_filter_sock_addr(sk, uaddr, atype,     \
 304                                                           t_ctx,               \
 305                                                           &__unused_flags);    \
 306                 release_sock(sk);                                              \
 307         }                                                                      \
 308         __ret;                                                                 \
 309 })
 310
 311 /* BPF_CGROUP_INET4_BIND and BPF_CGROUP_INET6_BIND can return extra flags
 312  * via upper bits of return code. The only flag that is supported
 313  * (at bit position 0) is to indicate CAP_NET_BIND_SERVICE capability check
 314  * should be bypassed (BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE).
 315  */
 316 #define BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr, atype, bind_flags)               \
 317 ({                                                                             \
 318         u32 __flags = 0;                                                       \
 319         int __ret = 0;                                                         \
 320         if (cgroup_bpf_enabled(atype))  {                                      \
 321                 lock_sock(sk);                                                 \
 322                 __ret = __cgroup_bpf_run_filter_sock_addr(sk, uaddr, atype,     \
 323                                                           NULL, &__flags);     \
 324                 release_sock(sk);                                              \
 325                 if (__flags & BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE)            \
 326                         *bind_flags |= BIND_NO_CAP_NET_BIND_SERVICE;           \
 327         }                                                                      \
 328         __ret;                                                                 \
 329 })
 330
 331 #define BPF_CGROUP_PRE_CONNECT_ENABLED(sk)                                     \
 332         ((cgroup_bpf_enabled(CGROUP_INET4_CONNECT) ||                  \
 333           cgroup_bpf_enabled(CGROUP_INET6_CONNECT)) &&                 \
 334          (sk)->sk_prot->pre_connect)
 335
 336 #define BPF_CGROUP_RUN_PROG_INET4_CONNECT(sk, uaddr)                           \
 337         BPF_CGROUP_RUN_SA_PROG(sk, uaddr, CGROUP_INET4_CONNECT)
 338
 339 #define BPF_CGROUP_RUN_PROG_INET6_CONNECT(sk, uaddr)                           \
 340         BPF_CGROUP_RUN_SA_PROG(sk, uaddr, CGROUP_INET6_CONNECT)
 341
 342 #define BPF_CGROUP_RUN_PROG_INET4_CONNECT_LOCK(sk, uaddr)                      \
 343         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, CGROUP_INET4_CONNECT, NULL)
 344
 345 #define BPF_CGROUP_RUN_PROG_INET6_CONNECT_LOCK(sk, uaddr)                      \
 346         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, CGROUP_INET6_CONNECT, NULL)
 347
 348 #define BPF_CGROUP_RUN_PROG_UDP4_SENDMSG_LOCK(sk, uaddr, t_ctx)                \
 349         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, CGROUP_UDP4_SENDMSG, t_ctx)
 350
 351 #define BPF_CGROUP_RUN_PROG_UDP6_SENDMSG_LOCK(sk, uaddr, t_ctx)                \
 352         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, CGROUP_UDP6_SENDMSG, t_ctx)
 353
 354 #define BPF_CGROUP_RUN_PROG_UDP4_RECVMSG_LOCK(sk, uaddr)                        \
 355         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, CGROUP_UDP4_RECVMSG, NULL)
 356
 357 #define BPF_CGROUP_RUN_PROG_UDP6_RECVMSG_LOCK(sk, uaddr)                        \
 358         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, CGROUP_UDP6_RECVMSG, NULL)
 359
 360 /* The SOCK_OPS"_SK" macro should be used when sock_ops->sk is not a
 361  * fullsock and its parent fullsock cannot be traced by
 362  * sk_to_full_sk().
 363  *
 364  * e.g. sock_ops->sk is a request_sock and it is under syncookie mode.
 365  * Its listener-sk is not attached to the rsk_listener.
 366  * In this case, the caller holds the listener-sk (unlocked),
 367  * set its sock_ops->sk to req_sk, and call this SOCK_OPS"_SK" with
 368  * the listener-sk such that the cgroup-bpf-progs of the
 369  * listener-sk will be run.
 370  *
 371  * Regardless of syncookie mode or not,
 372  * calling bpf_setsockopt on listener-sk will not make sense anyway,
 373  * so passing 'sock_ops->sk == req_sk' to the bpf prog is appropriate here.
 374  */
 375 #define BPF_CGROUP_RUN_PROG_SOCK_OPS_SK(sock_ops, sk)                   \
 376 ({                                                                      \
 377         int __ret = 0;                                                  \
 378         if (cgroup_bpf_enabled(CGROUP_SOCK_OPS))                        \
 379                 __ret = __cgroup_bpf_run_filter_sock_ops(sk,            \
 380                                                          sock_ops,      \
 381                                                          CGROUP_SOCK_OPS); \
 382         __ret;                                                          \
 383 })
 384
 385 #define BPF_CGROUP_RUN_PROG_SOCK_OPS(sock_ops)                                 \
 386 ({                                                                             \
 387         int __ret = 0;                                                         \
 388         if (cgroup_bpf_enabled(CGROUP_SOCK_OPS) && (sock_ops)->sk) {       \
 389                 typeof(sk) __sk = sk_to_full_sk((sock_ops)->sk);               \
 390                 if (__sk && sk_fullsock(__sk))                                 \
 391                         __ret = __cgroup_bpf_run_filter_sock_ops(__sk,         \
 392                                                                  sock_ops,     \
 393                                                          CGROUP_SOCK_OPS); \
 394         }                                                                      \
 395         __ret;                                                                 \
 396 })
 397
 398 #define BPF_CGROUP_RUN_PROG_DEVICE_CGROUP(atype, major, minor, access)        \
 399 ({                                                                            \
 400         int __ret = 0;                                                        \
 401         if (cgroup_bpf_enabled(CGROUP_DEVICE))                        \
 402                 __ret = __cgroup_bpf_check_dev_permission(atype, major, minor, \
 403                                                           access,             \
 404                                                           CGROUP_DEVICE); \
 405                                                                               \
 406         __ret;                                                                \
 407 })
 408
 409
 410 #define BPF_CGROUP_RUN_PROG_SYSCTL(head, table, write, buf, count, pos)  \
 411 ({                                                                             \
 412         int __ret = 0;                                                         \
 413         if (cgroup_bpf_enabled(CGROUP_SYSCTL))                         \
 414                 __ret = __cgroup_bpf_run_filter_sysctl(head, table, write,     \
 415                                                        buf, count, pos,        \
 416                                                        CGROUP_SYSCTL);     \
 417         __ret;                                                                 \
 418 })
 419
 420 #define BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock, level, optname, optval, optlen,   \
 421                                        kernel_optval)                          \
 422 ({                                                                             \
 423         int __ret = 0;                                                         \
 424         if (cgroup_bpf_enabled(CGROUP_SETSOCKOPT))                             \
 425                 __ret = __cgroup_bpf_run_filter_setsockopt(sock, level,        \
 426                                                            optname, optval,    \
 427                                                            optlen,             \
 428                                                            kernel_optval);     \
 429         __ret;                                                                 \
 430 })
 431
 432 #define BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen)                               \
 433 ({                                                                             \
 434         int __ret = 0;                                                         \
 435         if (cgroup_bpf_enabled(CGROUP_GETSOCKOPT))                             \
 436                 get_user(__ret, optlen);                                       \
 437         __ret;                                                                 \
 438 })
 439
 440 #define BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock, level, optname, optval, optlen,   \
 441                                        max_optlen, retval)                     \
 442 ({                                                                             \
 443         int __ret = retval;                                                    \
 444         if (cgroup_bpf_enabled(CGROUP_GETSOCKOPT))                             \
 445                 if (!(sock)->sk_prot->bpf_bypass_getsockopt ||                 \
 446                     !INDIRECT_CALL_INET_1((sock)->sk_prot->bpf_bypass_getsockopt, \
 447                                         tcp_bpf_bypass_getsockopt,             \
 448                                         level, optname))                       \
 449                         __ret = __cgroup_bpf_run_filter_getsockopt(            \
 450                                 sock, level, optname, optval, optlen,          \
 451                                 max_optlen, retval);                           \
 452         __ret;                                                                 \
 453 })
 454
 455 #define BPF_CGROUP_RUN_PROG_GETSOCKOPT_KERN(sock, level, optname, optval,      \
 456                                             optlen, retval)                    \
 457 ({                                                                             \
 458         int __ret = retval;                                                    \
 459         if (cgroup_bpf_enabled(CGROUP_GETSOCKOPT))                             \
 460                 __ret = __cgroup_bpf_run_filter_getsockopt_kern(               \
 461                         sock, level, optname, optval, optlen, retval);         \
 462         __ret;                                                                 \
 463 })
 464
 465 int cgroup_bpf_prog_attach(const union bpf_attr *attr,
 466                            enum bpf_prog_type ptype, struct bpf_prog *prog);
 467 int cgroup_bpf_prog_detach(const union bpf_attr *attr,
 468                            enum bpf_prog_type ptype);
 469 int cgroup_bpf_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
 470 int cgroup_bpf_prog_query(const union bpf_attr *attr,
 471                           union bpf_attr __user *uattr);
 472 #else
 473
 474 struct cgroup_bpf {};
 475 static inline int cgroup_bpf_inherit(struct cgroup *cgrp) { return 0; }
 476 static inline void cgroup_bpf_offline(struct cgroup *cgrp) {}
 477
 478 static inline int cgroup_bpf_prog_attach(const union bpf_attr *attr,
 479                                          enum bpf_prog_type ptype,
 480                                          struct bpf_prog *prog)
 481 {
 482         return -EINVAL;
 483 }
 484
 485 static inline int cgroup_bpf_prog_detach(const union bpf_attr *attr,
 486                                          enum bpf_prog_type ptype)
 487 {
 488         return -EINVAL;
 489 }
 490
 491 static inline int cgroup_bpf_link_attach(const union bpf_attr *attr,
 492                                          struct bpf_prog *prog)
 493 {
 494         return -EINVAL;
 495 }
 496
 497 static inline int cgroup_bpf_prog_query(const union bpf_attr *attr,
 498                                         union bpf_attr __user *uattr)
 499 {
 500         return -EINVAL;
 501 }
 502
 503 static inline int bpf_cgroup_storage_assign(struct bpf_prog_aux *aux,
 504                                             struct bpf_map *map) { return 0; }
 505 static inline struct bpf_cgroup_storage *bpf_cgroup_storage_alloc(
 506         struct bpf_prog *prog, enum bpf_cgroup_storage_type stype) { return NULL; }
 507 static inline void bpf_cgroup_storage_free(
 508         struct bpf_cgroup_storage *storage) {}
 509 static inline int bpf_percpu_cgroup_storage_copy(struct bpf_map *map, void *key,
 510                                                  void *value) {
 511         return 0;
 512 }
 513 static inline int bpf_percpu_cgroup_storage_update(struct bpf_map *map,
 514                                         void *key, void *value, u64 flags) {
 515         return 0;
 516 }
 517
 518 #define cgroup_bpf_enabled(atype) (0)
 519 #define BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, atype, t_ctx) ({ 0; })
 520 #define BPF_CGROUP_PRE_CONNECT_ENABLED(sk) (0)
 521 #define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk,skb) ({ 0; })
 522 #define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk,skb) ({ 0; })
 523 #define BPF_CGROUP_RUN_PROG_INET_SOCK(sk) ({ 0; })
 524 #define BPF_CGROUP_RUN_PROG_INET_SOCK_RELEASE(sk) ({ 0; })
 525 #define BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr, atype, flags) ({ 0; })
 526 #define BPF_CGROUP_RUN_PROG_INET4_POST_BIND(sk) ({ 0; })
 527 #define BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk) ({ 0; })
 528 #define BPF_CGROUP_RUN_PROG_INET4_CONNECT(sk, uaddr) ({ 0; })
 529 #define BPF_CGROUP_RUN_PROG_INET4_CONNECT_LOCK(sk, uaddr) ({ 0; })
 530 #define BPF_CGROUP_RUN_PROG_INET6_CONNECT(sk, uaddr) ({ 0; })
 531 #define BPF_CGROUP_RUN_PROG_INET6_CONNECT_LOCK(sk, uaddr) ({ 0; })
 532 #define BPF_CGROUP_RUN_PROG_UDP4_SENDMSG_LOCK(sk, uaddr, t_ctx) ({ 0; })
 533 #define BPF_CGROUP_RUN_PROG_UDP6_SENDMSG_LOCK(sk, uaddr, t_ctx) ({ 0; })
 534 #define BPF_CGROUP_RUN_PROG_UDP4_RECVMSG_LOCK(sk, uaddr) ({ 0; })
 535 #define BPF_CGROUP_RUN_PROG_UDP6_RECVMSG_LOCK(sk, uaddr) ({ 0; })
 536 #define BPF_CGROUP_RUN_PROG_SOCK_OPS(sock_ops) ({ 0; })
 537 #define BPF_CGROUP_RUN_PROG_DEVICE_CGROUP(atype, major, minor, access) ({ 0; })
 538 #define BPF_CGROUP_RUN_PROG_SYSCTL(head,table,write,buf,count,pos) ({ 0; })
 539 #define BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen) ({ 0; })
 540 #define BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock, level, optname, optval, \
 541                                        optlen, max_optlen, retval) ({ retval; })
 542 #define BPF_CGROUP_RUN_PROG_GETSOCKOPT_KERN(sock, level, optname, optval, \
 543                                             optlen, retval) ({ retval; })
 544 #define BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock, level, optname, optval, optlen, \
 545                                        kernel_optval) ({ 0; })
 546
 547 #define for_each_cgroup_storage_type(stype) for (; false; )
 548
 549 #endif /* CONFIG_CGROUP_BPF */
 550
 551 #endif /* _BPF_CGROUP_H */