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
  27 extern struct static_key_false cgroup_bpf_enabled_key[MAX_BPF_ATTACH_TYPE];
  28 #define cgroup_bpf_enabled(type) static_branch_unlikely(&cgroup_bpf_enabled_key[type])
  29
  30 #define BPF_CGROUP_STORAGE_NEST_MAX     8
  31
  32 struct bpf_cgroup_storage_info {
  33         struct task_struct *task;
  34         struct bpf_cgroup_storage *storage[MAX_BPF_CGROUP_STORAGE_TYPE];
  35 };
  36
  37 /* For each cpu, permit maximum BPF_CGROUP_STORAGE_NEST_MAX number of tasks
  38  * to use bpf cgroup storage simultaneously.
  39  */
  40 DECLARE_PER_CPU(struct bpf_cgroup_storage_info,
  41                 bpf_cgroup_storage_info[BPF_CGROUP_STORAGE_NEST_MAX]);
  42
  43 #define for_each_cgroup_storage_type(stype) \
  44         for (stype = 0; stype < MAX_BPF_CGROUP_STORAGE_TYPE; stype++)
  45
  46 struct bpf_cgroup_storage_map;
  47
  48 struct bpf_storage_buffer {
  49         struct rcu_head rcu;
  50         char data[];
  51 };
  52
  53 struct bpf_cgroup_storage {
  54         union {
  55                 struct bpf_storage_buffer *buf;
  56                 void __percpu *percpu_buf;
  57         };
  58         struct bpf_cgroup_storage_map *map;
  59         struct bpf_cgroup_storage_key key;
  60         struct list_head list_map;
  61         struct list_head list_cg;
  62         struct rb_node node;
  63         struct rcu_head rcu;
  64 };
  65
  66 struct bpf_cgroup_link {
  67         struct bpf_link link;
  68         struct cgroup *cgroup;
  69         enum bpf_attach_type type;
  70 };
  71
  72 struct bpf_prog_list {
  73         struct list_head node;
  74         struct bpf_prog *prog;
  75         struct bpf_cgroup_link *link;
  76         struct bpf_cgroup_storage *storage[MAX_BPF_CGROUP_STORAGE_TYPE];
  77 };
  78
  79 struct bpf_prog_array;
  80
  81 struct cgroup_bpf {
  82         /* array of effective progs in this cgroup */
  83         struct bpf_prog_array __rcu *effective[MAX_BPF_ATTACH_TYPE];
  84
  85         /* attached progs to this cgroup and attach flags
  86          * when flags == 0 or BPF_F_ALLOW_OVERRIDE the progs list will
  87          * have either zero or one element
  88          * when BPF_F_ALLOW_MULTI the list can have up to BPF_CGROUP_MAX_PROGS
  89          */
  90         struct list_head progs[MAX_BPF_ATTACH_TYPE];
  91         u32 flags[MAX_BPF_ATTACH_TYPE];
  92
  93         /* list of cgroup shared storages */
  94         struct list_head storages;
  95
  96         /* temp storage for effective prog array used by prog_attach/detach */
  97         struct bpf_prog_array *inactive;
  98
  99         /* reference counter used to detach bpf programs after cgroup removal */
 100         struct percpu_ref refcnt;
 101
 102         /* cgroup_bpf is released using a work queue */
 103         struct work_struct release_work;
 104 };
 105
 106 int cgroup_bpf_inherit(struct cgroup *cgrp);
 107 void cgroup_bpf_offline(struct cgroup *cgrp);
 108
 109 int __cgroup_bpf_attach(struct cgroup *cgrp,
 110                         struct bpf_prog *prog, struct bpf_prog *replace_prog,
 111                         struct bpf_cgroup_link *link,
 112                         enum bpf_attach_type type, u32 flags);
 113 int __cgroup_bpf_detach(struct cgroup *cgrp, struct bpf_prog *prog,
 114                         struct bpf_cgroup_link *link,
 115                         enum bpf_attach_type type);
 116 int __cgroup_bpf_query(struct cgroup *cgrp, const union bpf_attr *attr,
 117                        union bpf_attr __user *uattr);
 118
 119 /* Wrapper for __cgroup_bpf_*() protected by cgroup_mutex */
 120 int cgroup_bpf_attach(struct cgroup *cgrp,
 121                       struct bpf_prog *prog, struct bpf_prog *replace_prog,
 122                       struct bpf_cgroup_link *link, enum bpf_attach_type type,
 123                       u32 flags);
 124 int cgroup_bpf_detach(struct cgroup *cgrp, struct bpf_prog *prog,
 125                       enum bpf_attach_type type);
 126 int cgroup_bpf_query(struct cgroup *cgrp, const union bpf_attr *attr,
 127                      union bpf_attr __user *uattr);
 128
 129 int __cgroup_bpf_run_filter_skb(struct sock *sk,
 130                                 struct sk_buff *skb,
 131                                 enum bpf_attach_type type);
 132
 133 int __cgroup_bpf_run_filter_sk(struct sock *sk,
 134                                enum bpf_attach_type type);
 135
 136 int __cgroup_bpf_run_filter_sock_addr(struct sock *sk,
 137                                       struct sockaddr *uaddr,
 138                                       enum bpf_attach_type type,
 139                                       void *t_ctx,
 140                                       u32 *flags);
 141
 142 int __cgroup_bpf_run_filter_sock_ops(struct sock *sk,
 143                                      struct bpf_sock_ops_kern *sock_ops,
 144                                      enum bpf_attach_type type);
 145
 146 int __cgroup_bpf_check_dev_permission(short dev_type, u32 major, u32 minor,
 147                                       short access, enum bpf_attach_type type);
 148
 149 int __cgroup_bpf_run_filter_sysctl(struct ctl_table_header *head,
 150                                    struct ctl_table *table, int write,
 151                                    char **buf, size_t *pcount, loff_t *ppos,
 152                                    enum bpf_attach_type type);
 153
 154 int __cgroup_bpf_run_filter_setsockopt(struct sock *sock, int *level,
 155                                        int *optname, char __user *optval,
 156                                        int *optlen, char **kernel_optval);
 157 int __cgroup_bpf_run_filter_getsockopt(struct sock *sk, int level,
 158                                        int optname, char __user *optval,
 159                                        int __user *optlen, int max_optlen,
 160                                        int retval);
 161
 162 int __cgroup_bpf_run_filter_getsockopt_kern(struct sock *sk, int level,
 163                                             int optname, void *optval,
 164                                             int *optlen, int retval);
 165
 166 static inline enum bpf_cgroup_storage_type cgroup_storage_type(
 167         struct bpf_map *map)
 168 {
 169         if (map->map_type == BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE)
 170                 return BPF_CGROUP_STORAGE_PERCPU;
 171
 172         return BPF_CGROUP_STORAGE_SHARED;
 173 }
 174
 175 static inline int bpf_cgroup_storage_set(struct bpf_cgroup_storage
 176                                          *storage[MAX_BPF_CGROUP_STORAGE_TYPE])
 177 {
 178         enum bpf_cgroup_storage_type stype;
 179         int i, err = 0;
 180
 181         preempt_disable();
 182         for (i = 0; i < BPF_CGROUP_STORAGE_NEST_MAX; i++) {
 183                 if (unlikely(this_cpu_read(bpf_cgroup_storage_info[i].task) != NULL))
 184                         continue;
 185
 186                 this_cpu_write(bpf_cgroup_storage_info[i].task, current);
 187                 for_each_cgroup_storage_type(stype)
 188                         this_cpu_write(bpf_cgroup_storage_info[i].storage[stype],
 189                                        storage[stype]);
 190                 goto out;
 191         }
 192         err = -EBUSY;
 193         WARN_ON_ONCE(1);
 194
 195 out:
 196         preempt_enable();
 197         return err;
 198 }
 199
 200 static inline void bpf_cgroup_storage_unset(void)
 201 {
 202         int i;
 203
 204         for (i = BPF_CGROUP_STORAGE_NEST_MAX - 1; i >= 0; i--) {
 205                 if (likely(this_cpu_read(bpf_cgroup_storage_info[i].task) != current))
 206                         continue;
 207
 208                 this_cpu_write(bpf_cgroup_storage_info[i].task, NULL);
 209                 return;
 210         }
 211 }
 212
 213 struct bpf_cgroup_storage *
 214 cgroup_storage_lookup(struct bpf_cgroup_storage_map *map,
 215                       void *key, bool locked);
 216 struct bpf_cgroup_storage *bpf_cgroup_storage_alloc(struct bpf_prog *prog,
 217                                         enum bpf_cgroup_storage_type stype);
 218 void bpf_cgroup_storage_free(struct bpf_cgroup_storage *storage);
 219 void bpf_cgroup_storage_link(struct bpf_cgroup_storage *storage,
 220                              struct cgroup *cgroup,
 221                              enum bpf_attach_type type);
 222 void bpf_cgroup_storage_unlink(struct bpf_cgroup_storage *storage);
 223 int bpf_cgroup_storage_assign(struct bpf_prog_aux *aux, struct bpf_map *map);
 224
 225 int bpf_percpu_cgroup_storage_copy(struct bpf_map *map, void *key, void *value);
 226 int bpf_percpu_cgroup_storage_update(struct bpf_map *map, void *key,
 227                                      void *value, u64 flags);
 228
 229 /* Wrappers for __cgroup_bpf_run_filter_skb() guarded by cgroup_bpf_enabled. */
 230 #define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk, skb)                             \
 231 ({                                                                            \
 232         int __ret = 0;                                                        \
 233         if (cgroup_bpf_enabled(BPF_CGROUP_INET_INGRESS))                      \
 234                 __ret = __cgroup_bpf_run_filter_skb(sk, skb,                  \
 235                                                     BPF_CGROUP_INET_INGRESS); \
 236                                                                               \
 237         __ret;                                                                \
 238 })
 239
 240 #define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk, skb)                               \
 241 ({                                                                             \
 242         int __ret = 0;                                                         \
 243         if (cgroup_bpf_enabled(BPF_CGROUP_INET_EGRESS) && sk && sk == skb->sk) { \
 244                 typeof(sk) __sk = sk_to_full_sk(sk);                           \
 245                 if (sk_fullsock(__sk))                                         \
 246                         __ret = __cgroup_bpf_run_filter_skb(__sk, skb,         \
 247                                                       BPF_CGROUP_INET_EGRESS); \
 248         }                                                                      \
 249         __ret;                                                                 \
 250 })
 251
 252 #define BPF_CGROUP_RUN_SK_PROG(sk, type)                                       \
 253 ({                                                                             \
 254         int __ret = 0;                                                         \
 255         if (cgroup_bpf_enabled(type)) {                                        \
 256                 __ret = __cgroup_bpf_run_filter_sk(sk, type);                  \
 257         }                                                                      \
 258         __ret;                                                                 \
 259 })
 260
 261 #define BPF_CGROUP_RUN_PROG_INET_SOCK(sk)                                      \
 262         BPF_CGROUP_RUN_SK_PROG(sk, BPF_CGROUP_INET_SOCK_CREATE)
 263
 264 #define BPF_CGROUP_RUN_PROG_INET_SOCK_RELEASE(sk)                              \
 265         BPF_CGROUP_RUN_SK_PROG(sk, BPF_CGROUP_INET_SOCK_RELEASE)
 266
 267 #define BPF_CGROUP_RUN_PROG_INET4_POST_BIND(sk)                                \
 268         BPF_CGROUP_RUN_SK_PROG(sk, BPF_CGROUP_INET4_POST_BIND)
 269
 270 #define BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk)                                \
 271         BPF_CGROUP_RUN_SK_PROG(sk, BPF_CGROUP_INET6_POST_BIND)
 272
 273 #define BPF_CGROUP_RUN_SA_PROG(sk, uaddr, type)                                \
 274 ({                                                                             \
 275         u32 __unused_flags;                                                    \
 276         int __ret = 0;                                                         \
 277         if (cgroup_bpf_enabled(type))                                          \
 278                 __ret = __cgroup_bpf_run_filter_sock_addr(sk, uaddr, type,     \
 279                                                           NULL,                \
 280                                                           &__unused_flags);    \
 281         __ret;                                                                 \
 282 })
 283
 284 #define BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, type, t_ctx)                    \
 285 ({                                                                             \
 286         u32 __unused_flags;                                                    \
 287         int __ret = 0;                                                         \
 288         if (cgroup_bpf_enabled(type))   {                                      \
 289                 lock_sock(sk);                                                 \
 290                 __ret = __cgroup_bpf_run_filter_sock_addr(sk, uaddr, type,     \
 291                                                           t_ctx,               \
 292                                                           &__unused_flags);    \
 293                 release_sock(sk);                                              \
 294         }                                                                      \
 295         __ret;                                                                 \
 296 })
 297
 298 /* BPF_CGROUP_INET4_BIND and BPF_CGROUP_INET6_BIND can return extra flags
 299  * via upper bits of return code. The only flag that is supported
 300  * (at bit position 0) is to indicate CAP_NET_BIND_SERVICE capability check
 301  * should be bypassed (BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE).
 302  */
 303 #define BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr, type, bind_flags)        \
 304 ({                                                                             \
 305         u32 __flags = 0;                                                       \
 306         int __ret = 0;                                                         \
 307         if (cgroup_bpf_enabled(type))   {                                      \
 308                 lock_sock(sk);                                                 \
 309                 __ret = __cgroup_bpf_run_filter_sock_addr(sk, uaddr, type,     \
 310                                                           NULL, &__flags);     \
 311                 release_sock(sk);                                              \
 312                 if (__flags & BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE)            \
 313                         *bind_flags |= BIND_NO_CAP_NET_BIND_SERVICE;           \
 314         }                                                                      \
 315         __ret;                                                                 \
 316 })
 317
 318 #define BPF_CGROUP_PRE_CONNECT_ENABLED(sk)                                     \
 319         ((cgroup_bpf_enabled(BPF_CGROUP_INET4_CONNECT) ||                      \
 320           cgroup_bpf_enabled(BPF_CGROUP_INET6_CONNECT)) &&                     \
 321          (sk)->sk_prot->pre_connect)
 322
 323 #define BPF_CGROUP_RUN_PROG_INET4_CONNECT(sk, uaddr)                           \
 324         BPF_CGROUP_RUN_SA_PROG(sk, uaddr, BPF_CGROUP_INET4_CONNECT)
 325
 326 #define BPF_CGROUP_RUN_PROG_INET6_CONNECT(sk, uaddr)                           \
 327         BPF_CGROUP_RUN_SA_PROG(sk, uaddr, BPF_CGROUP_INET6_CONNECT)
 328
 329 #define BPF_CGROUP_RUN_PROG_INET4_CONNECT_LOCK(sk, uaddr)                      \
 330         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, BPF_CGROUP_INET4_CONNECT, NULL)
 331
 332 #define BPF_CGROUP_RUN_PROG_INET6_CONNECT_LOCK(sk, uaddr)                      \
 333         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, BPF_CGROUP_INET6_CONNECT, NULL)
 334
 335 #define BPF_CGROUP_RUN_PROG_UDP4_SENDMSG_LOCK(sk, uaddr, t_ctx)                \
 336         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, BPF_CGROUP_UDP4_SENDMSG, t_ctx)
 337
 338 #define BPF_CGROUP_RUN_PROG_UDP6_SENDMSG_LOCK(sk, uaddr, t_ctx)                \
 339         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, BPF_CGROUP_UDP6_SENDMSG, t_ctx)
 340
 341 #define BPF_CGROUP_RUN_PROG_UDP4_RECVMSG_LOCK(sk, uaddr)                        \
 342         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, BPF_CGROUP_UDP4_RECVMSG, NULL)
 343
 344 #define BPF_CGROUP_RUN_PROG_UDP6_RECVMSG_LOCK(sk, uaddr)                        \
 345         BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, BPF_CGROUP_UDP6_RECVMSG, NULL)
 346
 347 /* The SOCK_OPS"_SK" macro should be used when sock_ops->sk is not a
 348  * fullsock and its parent fullsock cannot be traced by
 349  * sk_to_full_sk().
 350  *
 351  * e.g. sock_ops->sk is a request_sock and it is under syncookie mode.
 352  * Its listener-sk is not attached to the rsk_listener.
 353  * In this case, the caller holds the listener-sk (unlocked),
 354  * set its sock_ops->sk to req_sk, and call this SOCK_OPS"_SK" with
 355  * the listener-sk such that the cgroup-bpf-progs of the
 356  * listener-sk will be run.
 357  *
 358  * Regardless of syncookie mode or not,
 359  * calling bpf_setsockopt on listener-sk will not make sense anyway,
 360  * so passing 'sock_ops->sk == req_sk' to the bpf prog is appropriate here.
 361  */
 362 #define BPF_CGROUP_RUN_PROG_SOCK_OPS_SK(sock_ops, sk)                   \
 363 ({                                                                      \
 364         int __ret = 0;                                                  \
 365         if (cgroup_bpf_enabled(BPF_CGROUP_SOCK_OPS))                    \
 366                 __ret = __cgroup_bpf_run_filter_sock_ops(sk,            \
 367                                                          sock_ops,      \
 368                                                          BPF_CGROUP_SOCK_OPS); \
 369         __ret;                                                          \
 370 })
 371
 372 #define BPF_CGROUP_RUN_PROG_SOCK_OPS(sock_ops)                                 \
 373 ({                                                                             \
 374         int __ret = 0;                                                         \
 375         if (cgroup_bpf_enabled(BPF_CGROUP_SOCK_OPS) && (sock_ops)->sk) {       \
 376                 typeof(sk) __sk = sk_to_full_sk((sock_ops)->sk);               \
 377                 if (__sk && sk_fullsock(__sk))                                 \
 378                         __ret = __cgroup_bpf_run_filter_sock_ops(__sk,         \
 379                                                                  sock_ops,     \
 380                                                          BPF_CGROUP_SOCK_OPS); \
 381         }                                                                      \
 382         __ret;                                                                 \
 383 })
 384
 385 #define BPF_CGROUP_RUN_PROG_DEVICE_CGROUP(type, major, minor, access)         \
 386 ({                                                                            \
 387         int __ret = 0;                                                        \
 388         if (cgroup_bpf_enabled(BPF_CGROUP_DEVICE))                            \
 389                 __ret = __cgroup_bpf_check_dev_permission(type, major, minor, \
 390                                                           access,             \
 391                                                           BPF_CGROUP_DEVICE); \
 392                                                                               \
 393         __ret;                                                                \
 394 })
 395
 396
 397 #define BPF_CGROUP_RUN_PROG_SYSCTL(head, table, write, buf, count, pos)  \
 398 ({                                                                             \
 399         int __ret = 0;                                                         \
 400         if (cgroup_bpf_enabled(BPF_CGROUP_SYSCTL))                             \
 401                 __ret = __cgroup_bpf_run_filter_sysctl(head, table, write,     \
 402                                                        buf, count, pos,        \
 403                                                        BPF_CGROUP_SYSCTL);     \
 404         __ret;                                                                 \
 405 })
 406
 407 #define BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock, level, optname, optval, optlen,   \
 408                                        kernel_optval)                          \
 409 ({                                                                             \
 410         int __ret = 0;                                                         \
 411         if (cgroup_bpf_enabled(BPF_CGROUP_SETSOCKOPT))                         \
 412                 __ret = __cgroup_bpf_run_filter_setsockopt(sock, level,        \
 413                                                            optname, optval,    \
 414                                                            optlen,             \
 415                                                            kernel_optval);     \
 416         __ret;                                                                 \
 417 })
 418
 419 #define BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen)                               \
 420 ({                                                                             \
 421         int __ret = 0;                                                         \
 422         if (cgroup_bpf_enabled(BPF_CGROUP_GETSOCKOPT))                         \
 423                 get_user(__ret, optlen);                                       \
 424         __ret;                                                                 \
 425 })
 426
 427 #define BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock, level, optname, optval, optlen,   \
 428                                        max_optlen, retval)                     \
 429 ({                                                                             \
 430         int __ret = retval;                                                    \
 431         if (cgroup_bpf_enabled(BPF_CGROUP_GETSOCKOPT))                         \
 432                 if (!(sock)->sk_prot->bpf_bypass_getsockopt ||                 \
 433                     !INDIRECT_CALL_INET_1((sock)->sk_prot->bpf_bypass_getsockopt, \
 434                                         tcp_bpf_bypass_getsockopt,             \
 435                                         level, optname))                       \
 436                         __ret = __cgroup_bpf_run_filter_getsockopt(            \
 437                                 sock, level, optname, optval, optlen,          \
 438                                 max_optlen, retval);                           \
 439         __ret;                                                                 \
 440 })
 441
 442 #define BPF_CGROUP_RUN_PROG_GETSOCKOPT_KERN(sock, level, optname, optval,      \
 443                                             optlen, retval)                    \
 444 ({                                                                             \
 445         int __ret = retval;                                                    \
 446         if (cgroup_bpf_enabled(BPF_CGROUP_GETSOCKOPT))                         \
 447                 __ret = __cgroup_bpf_run_filter_getsockopt_kern(               \
 448                         sock, level, optname, optval, optlen, retval);         \
 449         __ret;                                                                 \
 450 })
 451
 452 int cgroup_bpf_prog_attach(const union bpf_attr *attr,
 453                            enum bpf_prog_type ptype, struct bpf_prog *prog);
 454 int cgroup_bpf_prog_detach(const union bpf_attr *attr,
 455                            enum bpf_prog_type ptype);
 456 int cgroup_bpf_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
 457 int cgroup_bpf_prog_query(const union bpf_attr *attr,
 458                           union bpf_attr __user *uattr);
 459 #else
 460
 461 struct cgroup_bpf {};
 462 static inline int cgroup_bpf_inherit(struct cgroup *cgrp) { return 0; }
 463 static inline void cgroup_bpf_offline(struct cgroup *cgrp) {}
 464
 465 static inline int cgroup_bpf_prog_attach(const union bpf_attr *attr,
 466                                          enum bpf_prog_type ptype,
 467                                          struct bpf_prog *prog)
 468 {
 469         return -EINVAL;
 470 }
 471
 472 static inline int cgroup_bpf_prog_detach(const union bpf_attr *attr,
 473                                          enum bpf_prog_type ptype)
 474 {
 475         return -EINVAL;
 476 }
 477
 478 static inline int cgroup_bpf_link_attach(const union bpf_attr *attr,
 479                                          struct bpf_prog *prog)
 480 {
 481         return -EINVAL;
 482 }
 483
 484 static inline int cgroup_bpf_prog_query(const union bpf_attr *attr,
 485                                         union bpf_attr __user *uattr)
 486 {
 487         return -EINVAL;
 488 }
 489
 490 static inline int bpf_cgroup_storage_set(
 491         struct bpf_cgroup_storage *storage[MAX_BPF_CGROUP_STORAGE_TYPE]) { return 0; }
 492 static inline void bpf_cgroup_storage_unset(void) {}
 493 static inline int bpf_cgroup_storage_assign(struct bpf_prog_aux *aux,
 494                                             struct bpf_map *map) { return 0; }
 495 static inline struct bpf_cgroup_storage *bpf_cgroup_storage_alloc(
 496         struct bpf_prog *prog, enum bpf_cgroup_storage_type stype) { return NULL; }
 497 static inline void bpf_cgroup_storage_free(
 498         struct bpf_cgroup_storage *storage) {}
 499 static inline int bpf_percpu_cgroup_storage_copy(struct bpf_map *map, void *key,
 500                                                  void *value) {
 501         return 0;
 502 }
 503 static inline int bpf_percpu_cgroup_storage_update(struct bpf_map *map,
 504                                         void *key, void *value, u64 flags) {
 505         return 0;
 506 }
 507
 508 #define cgroup_bpf_enabled(type) (0)
 509 #define BPF_CGROUP_RUN_SA_PROG_LOCK(sk, uaddr, type, t_ctx) ({ 0; })
 510 #define BPF_CGROUP_PRE_CONNECT_ENABLED(sk) (0)
 511 #define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk,skb) ({ 0; })
 512 #define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk,skb) ({ 0; })
 513 #define BPF_CGROUP_RUN_PROG_INET_SOCK(sk) ({ 0; })
 514 #define BPF_CGROUP_RUN_PROG_INET_SOCK_RELEASE(sk) ({ 0; })
 515 #define BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr, type, flags) ({ 0; })
 516 #define BPF_CGROUP_RUN_PROG_INET4_POST_BIND(sk) ({ 0; })
 517 #define BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk) ({ 0; })
 518 #define BPF_CGROUP_RUN_PROG_INET4_CONNECT(sk, uaddr) ({ 0; })
 519 #define BPF_CGROUP_RUN_PROG_INET4_CONNECT_LOCK(sk, uaddr) ({ 0; })
 520 #define BPF_CGROUP_RUN_PROG_INET6_CONNECT(sk, uaddr) ({ 0; })
 521 #define BPF_CGROUP_RUN_PROG_INET6_CONNECT_LOCK(sk, uaddr) ({ 0; })
 522 #define BPF_CGROUP_RUN_PROG_UDP4_SENDMSG_LOCK(sk, uaddr, t_ctx) ({ 0; })
 523 #define BPF_CGROUP_RUN_PROG_UDP6_SENDMSG_LOCK(sk, uaddr, t_ctx) ({ 0; })
 524 #define BPF_CGROUP_RUN_PROG_UDP4_RECVMSG_LOCK(sk, uaddr) ({ 0; })
 525 #define BPF_CGROUP_RUN_PROG_UDP6_RECVMSG_LOCK(sk, uaddr) ({ 0; })
 526 #define BPF_CGROUP_RUN_PROG_SOCK_OPS(sock_ops) ({ 0; })
 527 #define BPF_CGROUP_RUN_PROG_DEVICE_CGROUP(type,major,minor,access) ({ 0; })
 528 #define BPF_CGROUP_RUN_PROG_SYSCTL(head,table,write,buf,count,pos) ({ 0; })
 529 #define BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen) ({ 0; })
 530 #define BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock, level, optname, optval, \
 531                                        optlen, max_optlen, retval) ({ retval; })
 532 #define BPF_CGROUP_RUN_PROG_GETSOCKOPT_KERN(sock, level, optname, optval, \
 533                                             optlen, retval) ({ retval; })
 534 #define BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock, level, optname, optval, optlen, \
 535                                        kernel_optval) ({ 0; })
 536
 537 #define for_each_cgroup_storage_type(stype) for (; false; )
 538
 539 #endif /* CONFIG_CGROUP_BPF */
 540
 541 #endif /* _BPF_CGROUP_H */