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TOMOYO Linux Cross Reference
Linux/include/linux/bpf.h

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  1 /* SPDX-License-Identifier: GPL-2.0-only */
  2 /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
  3  */
  4 #ifndef _LINUX_BPF_H
  5 #define _LINUX_BPF_H 1
  6 
  7 #include <uapi/linux/bpf.h>
  8 
  9 #include <linux/workqueue.h>
 10 #include <linux/file.h>
 11 #include <linux/percpu.h>
 12 #include <linux/err.h>
 13 #include <linux/rbtree_latch.h>
 14 #include <linux/numa.h>
 15 #include <linux/mm_types.h>
 16 #include <linux/wait.h>
 17 #include <linux/u64_stats_sync.h>
 18 #include <linux/refcount.h>
 19 #include <linux/mutex.h>
 20 #include <linux/module.h>
 21 #include <linux/kallsyms.h>
 22 #include <linux/capability.h>
 23 
 24 struct bpf_verifier_env;
 25 struct bpf_verifier_log;
 26 struct perf_event;
 27 struct bpf_prog;
 28 struct bpf_prog_aux;
 29 struct bpf_map;
 30 struct sock;
 31 struct seq_file;
 32 struct btf;
 33 struct btf_type;
 34 struct exception_table_entry;
 35 struct seq_operations;
 36 
 37 extern struct idr btf_idr;
 38 extern spinlock_t btf_idr_lock;
 39 
 40 /* map is generic key/value storage optionally accesible by eBPF programs */
 41 struct bpf_map_ops {
 42         /* funcs callable from userspace (via syscall) */
 43         int (*map_alloc_check)(union bpf_attr *attr);
 44         struct bpf_map *(*map_alloc)(union bpf_attr *attr);
 45         void (*map_release)(struct bpf_map *map, struct file *map_file);
 46         void (*map_free)(struct bpf_map *map);
 47         int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
 48         void (*map_release_uref)(struct bpf_map *map);
 49         void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
 50         int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr,
 51                                 union bpf_attr __user *uattr);
 52         int (*map_lookup_and_delete_batch)(struct bpf_map *map,
 53                                            const union bpf_attr *attr,
 54                                            union bpf_attr __user *uattr);
 55         int (*map_update_batch)(struct bpf_map *map, const union bpf_attr *attr,
 56                                 union bpf_attr __user *uattr);
 57         int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr,
 58                                 union bpf_attr __user *uattr);
 59 
 60         /* funcs callable from userspace and from eBPF programs */
 61         void *(*map_lookup_elem)(struct bpf_map *map, void *key);
 62         int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
 63         int (*map_delete_elem)(struct bpf_map *map, void *key);
 64         int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
 65         int (*map_pop_elem)(struct bpf_map *map, void *value);
 66         int (*map_peek_elem)(struct bpf_map *map, void *value);
 67 
 68         /* funcs called by prog_array and perf_event_array map */
 69         void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
 70                                 int fd);
 71         void (*map_fd_put_ptr)(void *ptr);
 72         u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
 73         u32 (*map_fd_sys_lookup_elem)(void *ptr);
 74         void (*map_seq_show_elem)(struct bpf_map *map, void *key,
 75                                   struct seq_file *m);
 76         int (*map_check_btf)(const struct bpf_map *map,
 77                              const struct btf *btf,
 78                              const struct btf_type *key_type,
 79                              const struct btf_type *value_type);
 80 
 81         /* Prog poke tracking helpers. */
 82         int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux);
 83         void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux);
 84         void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old,
 85                              struct bpf_prog *new);
 86 
 87         /* Direct value access helpers. */
 88         int (*map_direct_value_addr)(const struct bpf_map *map,
 89                                      u64 *imm, u32 off);
 90         int (*map_direct_value_meta)(const struct bpf_map *map,
 91                                      u64 imm, u32 *off);
 92         int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma);
 93         __poll_t (*map_poll)(struct bpf_map *map, struct file *filp,
 94                              struct poll_table_struct *pts);
 95 };
 96 
 97 struct bpf_map_memory {
 98         u32 pages;
 99         struct user_struct *user;
100 };
101 
102 struct bpf_map {
103         /* The first two cachelines with read-mostly members of which some
104          * are also accessed in fast-path (e.g. ops, max_entries).
105          */
106         const struct bpf_map_ops *ops ____cacheline_aligned;
107         struct bpf_map *inner_map_meta;
108 #ifdef CONFIG_SECURITY
109         void *security;
110 #endif
111         enum bpf_map_type map_type;
112         u32 key_size;
113         u32 value_size;
114         u32 max_entries;
115         u32 map_flags;
116         int spin_lock_off; /* >=0 valid offset, <0 error */
117         u32 id;
118         int numa_node;
119         u32 btf_key_type_id;
120         u32 btf_value_type_id;
121         struct btf *btf;
122         struct bpf_map_memory memory;
123         char name[BPF_OBJ_NAME_LEN];
124         u32 btf_vmlinux_value_type_id;
125         bool bypass_spec_v1;
126         bool frozen; /* write-once; write-protected by freeze_mutex */
127         /* 22 bytes hole */
128 
129         /* The 3rd and 4th cacheline with misc members to avoid false sharing
130          * particularly with refcounting.
131          */
132         atomic64_t refcnt ____cacheline_aligned;
133         atomic64_t usercnt;
134         struct work_struct work;
135         struct mutex freeze_mutex;
136         u64 writecnt; /* writable mmap cnt; protected by freeze_mutex */
137 };
138 
139 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
140 {
141         return map->spin_lock_off >= 0;
142 }
143 
144 static inline void check_and_init_map_lock(struct bpf_map *map, void *dst)
145 {
146         if (likely(!map_value_has_spin_lock(map)))
147                 return;
148         *(struct bpf_spin_lock *)(dst + map->spin_lock_off) =
149                 (struct bpf_spin_lock){};
150 }
151 
152 /* copy everything but bpf_spin_lock */
153 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
154 {
155         if (unlikely(map_value_has_spin_lock(map))) {
156                 u32 off = map->spin_lock_off;
157 
158                 memcpy(dst, src, off);
159                 memcpy(dst + off + sizeof(struct bpf_spin_lock),
160                        src + off + sizeof(struct bpf_spin_lock),
161                        map->value_size - off - sizeof(struct bpf_spin_lock));
162         } else {
163                 memcpy(dst, src, map->value_size);
164         }
165 }
166 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
167                            bool lock_src);
168 int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size);
169 
170 struct bpf_offload_dev;
171 struct bpf_offloaded_map;
172 
173 struct bpf_map_dev_ops {
174         int (*map_get_next_key)(struct bpf_offloaded_map *map,
175                                 void *key, void *next_key);
176         int (*map_lookup_elem)(struct bpf_offloaded_map *map,
177                                void *key, void *value);
178         int (*map_update_elem)(struct bpf_offloaded_map *map,
179                                void *key, void *value, u64 flags);
180         int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
181 };
182 
183 struct bpf_offloaded_map {
184         struct bpf_map map;
185         struct net_device *netdev;
186         const struct bpf_map_dev_ops *dev_ops;
187         void *dev_priv;
188         struct list_head offloads;
189 };
190 
191 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
192 {
193         return container_of(map, struct bpf_offloaded_map, map);
194 }
195 
196 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
197 {
198         return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
199 }
200 
201 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
202 {
203         return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
204                 map->ops->map_seq_show_elem;
205 }
206 
207 int map_check_no_btf(const struct bpf_map *map,
208                      const struct btf *btf,
209                      const struct btf_type *key_type,
210                      const struct btf_type *value_type);
211 
212 extern const struct bpf_map_ops bpf_map_offload_ops;
213 
214 /* function argument constraints */
215 enum bpf_arg_type {
216         ARG_DONTCARE = 0,       /* unused argument in helper function */
217 
218         /* the following constraints used to prototype
219          * bpf_map_lookup/update/delete_elem() functions
220          */
221         ARG_CONST_MAP_PTR,      /* const argument used as pointer to bpf_map */
222         ARG_PTR_TO_MAP_KEY,     /* pointer to stack used as map key */
223         ARG_PTR_TO_MAP_VALUE,   /* pointer to stack used as map value */
224         ARG_PTR_TO_UNINIT_MAP_VALUE,    /* pointer to valid memory used to store a map value */
225         ARG_PTR_TO_MAP_VALUE_OR_NULL,   /* pointer to stack used as map value or NULL */
226 
227         /* the following constraints used to prototype bpf_memcmp() and other
228          * functions that access data on eBPF program stack
229          */
230         ARG_PTR_TO_MEM,         /* pointer to valid memory (stack, packet, map value) */
231         ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
232         ARG_PTR_TO_UNINIT_MEM,  /* pointer to memory does not need to be initialized,
233                                  * helper function must fill all bytes or clear
234                                  * them in error case.
235                                  */
236 
237         ARG_CONST_SIZE,         /* number of bytes accessed from memory */
238         ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
239 
240         ARG_PTR_TO_CTX,         /* pointer to context */
241         ARG_PTR_TO_CTX_OR_NULL, /* pointer to context or NULL */
242         ARG_ANYTHING,           /* any (initialized) argument is ok */
243         ARG_PTR_TO_SPIN_LOCK,   /* pointer to bpf_spin_lock */
244         ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
245         ARG_PTR_TO_INT,         /* pointer to int */
246         ARG_PTR_TO_LONG,        /* pointer to long */
247         ARG_PTR_TO_SOCKET,      /* pointer to bpf_sock (fullsock) */
248         ARG_PTR_TO_BTF_ID,      /* pointer to in-kernel struct */
249         ARG_PTR_TO_ALLOC_MEM,   /* pointer to dynamically allocated memory */
250         ARG_PTR_TO_ALLOC_MEM_OR_NULL,   /* pointer to dynamically allocated memory or NULL */
251         ARG_CONST_ALLOC_SIZE_OR_ZERO,   /* number of allocated bytes requested */
252 };
253 
254 /* type of values returned from helper functions */
255 enum bpf_return_type {
256         RET_INTEGER,                    /* function returns integer */
257         RET_VOID,                       /* function doesn't return anything */
258         RET_PTR_TO_MAP_VALUE,           /* returns a pointer to map elem value */
259         RET_PTR_TO_MAP_VALUE_OR_NULL,   /* returns a pointer to map elem value or NULL */
260         RET_PTR_TO_SOCKET_OR_NULL,      /* returns a pointer to a socket or NULL */
261         RET_PTR_TO_TCP_SOCK_OR_NULL,    /* returns a pointer to a tcp_sock or NULL */
262         RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */
263         RET_PTR_TO_ALLOC_MEM_OR_NULL,   /* returns a pointer to dynamically allocated memory or NULL */
264 };
265 
266 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
267  * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
268  * instructions after verifying
269  */
270 struct bpf_func_proto {
271         u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
272         bool gpl_only;
273         bool pkt_access;
274         enum bpf_return_type ret_type;
275         union {
276                 struct {
277                         enum bpf_arg_type arg1_type;
278                         enum bpf_arg_type arg2_type;
279                         enum bpf_arg_type arg3_type;
280                         enum bpf_arg_type arg4_type;
281                         enum bpf_arg_type arg5_type;
282                 };
283                 enum bpf_arg_type arg_type[5];
284         };
285         int *btf_id; /* BTF ids of arguments */
286 };
287 
288 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
289  * the first argument to eBPF programs.
290  * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
291  */
292 struct bpf_context;
293 
294 enum bpf_access_type {
295         BPF_READ = 1,
296         BPF_WRITE = 2
297 };
298 
299 /* types of values stored in eBPF registers */
300 /* Pointer types represent:
301  * pointer
302  * pointer + imm
303  * pointer + (u16) var
304  * pointer + (u16) var + imm
305  * if (range > 0) then [ptr, ptr + range - off) is safe to access
306  * if (id > 0) means that some 'var' was added
307  * if (off > 0) means that 'imm' was added
308  */
309 enum bpf_reg_type {
310         NOT_INIT = 0,            /* nothing was written into register */
311         SCALAR_VALUE,            /* reg doesn't contain a valid pointer */
312         PTR_TO_CTX,              /* reg points to bpf_context */
313         CONST_PTR_TO_MAP,        /* reg points to struct bpf_map */
314         PTR_TO_MAP_VALUE,        /* reg points to map element value */
315         PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
316         PTR_TO_STACK,            /* reg == frame_pointer + offset */
317         PTR_TO_PACKET_META,      /* skb->data - meta_len */
318         PTR_TO_PACKET,           /* reg points to skb->data */
319         PTR_TO_PACKET_END,       /* skb->data + headlen */
320         PTR_TO_FLOW_KEYS,        /* reg points to bpf_flow_keys */
321         PTR_TO_SOCKET,           /* reg points to struct bpf_sock */
322         PTR_TO_SOCKET_OR_NULL,   /* reg points to struct bpf_sock or NULL */
323         PTR_TO_SOCK_COMMON,      /* reg points to sock_common */
324         PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */
325         PTR_TO_TCP_SOCK,         /* reg points to struct tcp_sock */
326         PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
327         PTR_TO_TP_BUFFER,        /* reg points to a writable raw tp's buffer */
328         PTR_TO_XDP_SOCK,         /* reg points to struct xdp_sock */
329         PTR_TO_BTF_ID,           /* reg points to kernel struct */
330         PTR_TO_BTF_ID_OR_NULL,   /* reg points to kernel struct or NULL */
331         PTR_TO_MEM,              /* reg points to valid memory region */
332         PTR_TO_MEM_OR_NULL,      /* reg points to valid memory region or NULL */
333 };
334 
335 /* The information passed from prog-specific *_is_valid_access
336  * back to the verifier.
337  */
338 struct bpf_insn_access_aux {
339         enum bpf_reg_type reg_type;
340         union {
341                 int ctx_field_size;
342                 u32 btf_id;
343         };
344         struct bpf_verifier_log *log; /* for verbose logs */
345 };
346 
347 static inline void
348 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
349 {
350         aux->ctx_field_size = size;
351 }
352 
353 struct bpf_prog_ops {
354         int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
355                         union bpf_attr __user *uattr);
356 };
357 
358 struct bpf_verifier_ops {
359         /* return eBPF function prototype for verification */
360         const struct bpf_func_proto *
361         (*get_func_proto)(enum bpf_func_id func_id,
362                           const struct bpf_prog *prog);
363 
364         /* return true if 'size' wide access at offset 'off' within bpf_context
365          * with 'type' (read or write) is allowed
366          */
367         bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
368                                 const struct bpf_prog *prog,
369                                 struct bpf_insn_access_aux *info);
370         int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
371                             const struct bpf_prog *prog);
372         int (*gen_ld_abs)(const struct bpf_insn *orig,
373                           struct bpf_insn *insn_buf);
374         u32 (*convert_ctx_access)(enum bpf_access_type type,
375                                   const struct bpf_insn *src,
376                                   struct bpf_insn *dst,
377                                   struct bpf_prog *prog, u32 *target_size);
378         int (*btf_struct_access)(struct bpf_verifier_log *log,
379                                  const struct btf_type *t, int off, int size,
380                                  enum bpf_access_type atype,
381                                  u32 *next_btf_id);
382 };
383 
384 struct bpf_prog_offload_ops {
385         /* verifier basic callbacks */
386         int (*insn_hook)(struct bpf_verifier_env *env,
387                          int insn_idx, int prev_insn_idx);
388         int (*finalize)(struct bpf_verifier_env *env);
389         /* verifier optimization callbacks (called after .finalize) */
390         int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
391                             struct bpf_insn *insn);
392         int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
393         /* program management callbacks */
394         int (*prepare)(struct bpf_prog *prog);
395         int (*translate)(struct bpf_prog *prog);
396         void (*destroy)(struct bpf_prog *prog);
397 };
398 
399 struct bpf_prog_offload {
400         struct bpf_prog         *prog;
401         struct net_device       *netdev;
402         struct bpf_offload_dev  *offdev;
403         void                    *dev_priv;
404         struct list_head        offloads;
405         bool                    dev_state;
406         bool                    opt_failed;
407         void                    *jited_image;
408         u32                     jited_len;
409 };
410 
411 enum bpf_cgroup_storage_type {
412         BPF_CGROUP_STORAGE_SHARED,
413         BPF_CGROUP_STORAGE_PERCPU,
414         __BPF_CGROUP_STORAGE_MAX
415 };
416 
417 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
418 
419 /* The longest tracepoint has 12 args.
420  * See include/trace/bpf_probe.h
421  */
422 #define MAX_BPF_FUNC_ARGS 12
423 
424 struct bpf_prog_stats {
425         u64 cnt;
426         u64 nsecs;
427         struct u64_stats_sync syncp;
428 } __aligned(2 * sizeof(u64));
429 
430 struct btf_func_model {
431         u8 ret_size;
432         u8 nr_args;
433         u8 arg_size[MAX_BPF_FUNC_ARGS];
434 };
435 
436 /* Restore arguments before returning from trampoline to let original function
437  * continue executing. This flag is used for fentry progs when there are no
438  * fexit progs.
439  */
440 #define BPF_TRAMP_F_RESTORE_REGS        BIT(0)
441 /* Call original function after fentry progs, but before fexit progs.
442  * Makes sense for fentry/fexit, normal calls and indirect calls.
443  */
444 #define BPF_TRAMP_F_CALL_ORIG           BIT(1)
445 /* Skip current frame and return to parent.  Makes sense for fentry/fexit
446  * programs only. Should not be used with normal calls and indirect calls.
447  */
448 #define BPF_TRAMP_F_SKIP_FRAME          BIT(2)
449 
450 /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50
451  * bytes on x86.  Pick a number to fit into BPF_IMAGE_SIZE / 2
452  */
453 #define BPF_MAX_TRAMP_PROGS 40
454 
455 struct bpf_tramp_progs {
456         struct bpf_prog *progs[BPF_MAX_TRAMP_PROGS];
457         int nr_progs;
458 };
459 
460 /* Different use cases for BPF trampoline:
461  * 1. replace nop at the function entry (kprobe equivalent)
462  *    flags = BPF_TRAMP_F_RESTORE_REGS
463  *    fentry = a set of programs to run before returning from trampoline
464  *
465  * 2. replace nop at the function entry (kprobe + kretprobe equivalent)
466  *    flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
467  *    orig_call = fentry_ip + MCOUNT_INSN_SIZE
468  *    fentry = a set of program to run before calling original function
469  *    fexit = a set of program to run after original function
470  *
471  * 3. replace direct call instruction anywhere in the function body
472  *    or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
473  *    With flags = 0
474  *      fentry = a set of programs to run before returning from trampoline
475  *    With flags = BPF_TRAMP_F_CALL_ORIG
476  *      orig_call = original callback addr or direct function addr
477  *      fentry = a set of program to run before calling original function
478  *      fexit = a set of program to run after original function
479  */
480 int arch_prepare_bpf_trampoline(void *image, void *image_end,
481                                 const struct btf_func_model *m, u32 flags,
482                                 struct bpf_tramp_progs *tprogs,
483                                 void *orig_call);
484 /* these two functions are called from generated trampoline */
485 u64 notrace __bpf_prog_enter(void);
486 void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start);
487 
488 struct bpf_ksym {
489         unsigned long            start;
490         unsigned long            end;
491         char                     name[KSYM_NAME_LEN];
492         struct list_head         lnode;
493         struct latch_tree_node   tnode;
494         bool                     prog;
495 };
496 
497 enum bpf_tramp_prog_type {
498         BPF_TRAMP_FENTRY,
499         BPF_TRAMP_FEXIT,
500         BPF_TRAMP_MODIFY_RETURN,
501         BPF_TRAMP_MAX,
502         BPF_TRAMP_REPLACE, /* more than MAX */
503 };
504 
505 struct bpf_trampoline {
506         /* hlist for trampoline_table */
507         struct hlist_node hlist;
508         /* serializes access to fields of this trampoline */
509         struct mutex mutex;
510         refcount_t refcnt;
511         u64 key;
512         struct {
513                 struct btf_func_model model;
514                 void *addr;
515                 bool ftrace_managed;
516         } func;
517         /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
518          * program by replacing one of its functions. func.addr is the address
519          * of the function it replaced.
520          */
521         struct bpf_prog *extension_prog;
522         /* list of BPF programs using this trampoline */
523         struct hlist_head progs_hlist[BPF_TRAMP_MAX];
524         /* Number of attached programs. A counter per kind. */
525         int progs_cnt[BPF_TRAMP_MAX];
526         /* Executable image of trampoline */
527         void *image;
528         u64 selector;
529         struct bpf_ksym ksym;
530 };
531 
532 #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
533 
534 struct bpf_dispatcher_prog {
535         struct bpf_prog *prog;
536         refcount_t users;
537 };
538 
539 struct bpf_dispatcher {
540         /* dispatcher mutex */
541         struct mutex mutex;
542         void *func;
543         struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
544         int num_progs;
545         void *image;
546         u32 image_off;
547         struct bpf_ksym ksym;
548 };
549 
550 static __always_inline unsigned int bpf_dispatcher_nop_func(
551         const void *ctx,
552         const struct bpf_insn *insnsi,
553         unsigned int (*bpf_func)(const void *,
554                                  const struct bpf_insn *))
555 {
556         return bpf_func(ctx, insnsi);
557 }
558 #ifdef CONFIG_BPF_JIT
559 struct bpf_trampoline *bpf_trampoline_lookup(u64 key);
560 int bpf_trampoline_link_prog(struct bpf_prog *prog);
561 int bpf_trampoline_unlink_prog(struct bpf_prog *prog);
562 void bpf_trampoline_put(struct bpf_trampoline *tr);
563 #define BPF_DISPATCHER_INIT(_name) {                            \
564         .mutex = __MUTEX_INITIALIZER(_name.mutex),              \
565         .func = &_name##_func,                                  \
566         .progs = {},                                            \
567         .num_progs = 0,                                         \
568         .image = NULL,                                          \
569         .image_off = 0,                                         \
570         .ksym = {                                               \
571                 .name  = #_name,                                \
572                 .lnode = LIST_HEAD_INIT(_name.ksym.lnode),      \
573         },                                                      \
574 }
575 
576 #define DEFINE_BPF_DISPATCHER(name)                                     \
577         noinline unsigned int bpf_dispatcher_##name##_func(             \
578                 const void *ctx,                                        \
579                 const struct bpf_insn *insnsi,                          \
580                 unsigned int (*bpf_func)(const void *,                  \
581                                          const struct bpf_insn *))      \
582         {                                                               \
583                 return bpf_func(ctx, insnsi);                           \
584         }                                                               \
585         EXPORT_SYMBOL(bpf_dispatcher_##name##_func);                    \
586         struct bpf_dispatcher bpf_dispatcher_##name =                   \
587                 BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
588 #define DECLARE_BPF_DISPATCHER(name)                                    \
589         unsigned int bpf_dispatcher_##name##_func(                      \
590                 const void *ctx,                                        \
591                 const struct bpf_insn *insnsi,                          \
592                 unsigned int (*bpf_func)(const void *,                  \
593                                          const struct bpf_insn *));     \
594         extern struct bpf_dispatcher bpf_dispatcher_##name;
595 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
596 #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
597 void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
598                                 struct bpf_prog *to);
599 /* Called only from JIT-enabled code, so there's no need for stubs. */
600 void *bpf_jit_alloc_exec_page(void);
601 void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym);
602 void bpf_image_ksym_del(struct bpf_ksym *ksym);
603 void bpf_ksym_add(struct bpf_ksym *ksym);
604 void bpf_ksym_del(struct bpf_ksym *ksym);
605 #else
606 static inline struct bpf_trampoline *bpf_trampoline_lookup(u64 key)
607 {
608         return NULL;
609 }
610 static inline int bpf_trampoline_link_prog(struct bpf_prog *prog)
611 {
612         return -ENOTSUPP;
613 }
614 static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog)
615 {
616         return -ENOTSUPP;
617 }
618 static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
619 #define DEFINE_BPF_DISPATCHER(name)
620 #define DECLARE_BPF_DISPATCHER(name)
621 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
622 #define BPF_DISPATCHER_PTR(name) NULL
623 static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
624                                               struct bpf_prog *from,
625                                               struct bpf_prog *to) {}
626 static inline bool is_bpf_image_address(unsigned long address)
627 {
628         return false;
629 }
630 #endif
631 
632 struct bpf_func_info_aux {
633         u16 linkage;
634         bool unreliable;
635 };
636 
637 enum bpf_jit_poke_reason {
638         BPF_POKE_REASON_TAIL_CALL,
639 };
640 
641 /* Descriptor of pokes pointing /into/ the JITed image. */
642 struct bpf_jit_poke_descriptor {
643         void *ip;
644         union {
645                 struct {
646                         struct bpf_map *map;
647                         u32 key;
648                 } tail_call;
649         };
650         bool ip_stable;
651         u8 adj_off;
652         u16 reason;
653 };
654 
655 /* reg_type info for ctx arguments */
656 struct bpf_ctx_arg_aux {
657         u32 offset;
658         enum bpf_reg_type reg_type;
659 };
660 
661 struct bpf_prog_aux {
662         atomic64_t refcnt;
663         u32 used_map_cnt;
664         u32 max_ctx_offset;
665         u32 max_pkt_offset;
666         u32 max_tp_access;
667         u32 stack_depth;
668         u32 id;
669         u32 func_cnt; /* used by non-func prog as the number of func progs */
670         u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
671         u32 attach_btf_id; /* in-kernel BTF type id to attach to */
672         u32 ctx_arg_info_size;
673         const struct bpf_ctx_arg_aux *ctx_arg_info;
674         struct bpf_prog *linked_prog;
675         bool verifier_zext; /* Zero extensions has been inserted by verifier. */
676         bool offload_requested;
677         bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
678         bool func_proto_unreliable;
679         enum bpf_tramp_prog_type trampoline_prog_type;
680         struct bpf_trampoline *trampoline;
681         struct hlist_node tramp_hlist;
682         /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
683         const struct btf_type *attach_func_proto;
684         /* function name for valid attach_btf_id */
685         const char *attach_func_name;
686         struct bpf_prog **func;
687         void *jit_data; /* JIT specific data. arch dependent */
688         struct bpf_jit_poke_descriptor *poke_tab;
689         u32 size_poke_tab;
690         struct bpf_ksym ksym;
691         const struct bpf_prog_ops *ops;
692         struct bpf_map **used_maps;
693         struct bpf_prog *prog;
694         struct user_struct *user;
695         u64 load_time; /* ns since boottime */
696         struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
697         char name[BPF_OBJ_NAME_LEN];
698 #ifdef CONFIG_SECURITY
699         void *security;
700 #endif
701         struct bpf_prog_offload *offload;
702         struct btf *btf;
703         struct bpf_func_info *func_info;
704         struct bpf_func_info_aux *func_info_aux;
705         /* bpf_line_info loaded from userspace.  linfo->insn_off
706          * has the xlated insn offset.
707          * Both the main and sub prog share the same linfo.
708          * The subprog can access its first linfo by
709          * using the linfo_idx.
710          */
711         struct bpf_line_info *linfo;
712         /* jited_linfo is the jited addr of the linfo.  It has a
713          * one to one mapping to linfo:
714          * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
715          * Both the main and sub prog share the same jited_linfo.
716          * The subprog can access its first jited_linfo by
717          * using the linfo_idx.
718          */
719         void **jited_linfo;
720         u32 func_info_cnt;
721         u32 nr_linfo;
722         /* subprog can use linfo_idx to access its first linfo and
723          * jited_linfo.
724          * main prog always has linfo_idx == 0
725          */
726         u32 linfo_idx;
727         u32 num_exentries;
728         struct exception_table_entry *extable;
729         struct bpf_prog_stats __percpu *stats;
730         union {
731                 struct work_struct work;
732                 struct rcu_head rcu;
733         };
734 };
735 
736 struct bpf_array_aux {
737         /* 'Ownership' of prog array is claimed by the first program that
738          * is going to use this map or by the first program which FD is
739          * stored in the map to make sure that all callers and callees have
740          * the same prog type and JITed flag.
741          */
742         enum bpf_prog_type type;
743         bool jited;
744         /* Programs with direct jumps into programs part of this array. */
745         struct list_head poke_progs;
746         struct bpf_map *map;
747         struct mutex poke_mutex;
748         struct work_struct work;
749 };
750 
751 struct bpf_struct_ops_value;
752 struct btf_type;
753 struct btf_member;
754 
755 #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
756 struct bpf_struct_ops {
757         const struct bpf_verifier_ops *verifier_ops;
758         int (*init)(struct btf *btf);
759         int (*check_member)(const struct btf_type *t,
760                             const struct btf_member *member);
761         int (*init_member)(const struct btf_type *t,
762                            const struct btf_member *member,
763                            void *kdata, const void *udata);
764         int (*reg)(void *kdata);
765         void (*unreg)(void *kdata);
766         const struct btf_type *type;
767         const struct btf_type *value_type;
768         const char *name;
769         struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
770         u32 type_id;
771         u32 value_id;
772 };
773 
774 #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
775 #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
776 const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id);
777 void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
778 bool bpf_struct_ops_get(const void *kdata);
779 void bpf_struct_ops_put(const void *kdata);
780 int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
781                                        void *value);
782 static inline bool bpf_try_module_get(const void *data, struct module *owner)
783 {
784         if (owner == BPF_MODULE_OWNER)
785                 return bpf_struct_ops_get(data);
786         else
787                 return try_module_get(owner);
788 }
789 static inline void bpf_module_put(const void *data, struct module *owner)
790 {
791         if (owner == BPF_MODULE_OWNER)
792                 bpf_struct_ops_put(data);
793         else
794                 module_put(owner);
795 }
796 #else
797 static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
798 {
799         return NULL;
800 }
801 static inline void bpf_struct_ops_init(struct btf *btf,
802                                        struct bpf_verifier_log *log)
803 {
804 }
805 static inline bool bpf_try_module_get(const void *data, struct module *owner)
806 {
807         return try_module_get(owner);
808 }
809 static inline void bpf_module_put(const void *data, struct module *owner)
810 {
811         module_put(owner);
812 }
813 static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
814                                                      void *key,
815                                                      void *value)
816 {
817         return -EINVAL;
818 }
819 #endif
820 
821 struct bpf_array {
822         struct bpf_map map;
823         u32 elem_size;
824         u32 index_mask;
825         struct bpf_array_aux *aux;
826         union {
827                 char value[0] __aligned(8);
828                 void *ptrs[0] __aligned(8);
829                 void __percpu *pptrs[0] __aligned(8);
830         };
831 };
832 
833 #define BPF_COMPLEXITY_LIMIT_INSNS      1000000 /* yes. 1M insns */
834 #define MAX_TAIL_CALL_CNT 32
835 
836 #define BPF_F_ACCESS_MASK       (BPF_F_RDONLY |         \
837                                  BPF_F_RDONLY_PROG |    \
838                                  BPF_F_WRONLY |         \
839                                  BPF_F_WRONLY_PROG)
840 
841 #define BPF_MAP_CAN_READ        BIT(0)
842 #define BPF_MAP_CAN_WRITE       BIT(1)
843 
844 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
845 {
846         u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
847 
848         /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
849          * not possible.
850          */
851         if (access_flags & BPF_F_RDONLY_PROG)
852                 return BPF_MAP_CAN_READ;
853         else if (access_flags & BPF_F_WRONLY_PROG)
854                 return BPF_MAP_CAN_WRITE;
855         else
856                 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
857 }
858 
859 static inline bool bpf_map_flags_access_ok(u32 access_flags)
860 {
861         return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
862                (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
863 }
864 
865 struct bpf_event_entry {
866         struct perf_event *event;
867         struct file *perf_file;
868         struct file *map_file;
869         struct rcu_head rcu;
870 };
871 
872 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
873 int bpf_prog_calc_tag(struct bpf_prog *fp);
874 const char *kernel_type_name(u32 btf_type_id);
875 
876 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
877 
878 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
879                                         unsigned long off, unsigned long len);
880 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
881                                         const struct bpf_insn *src,
882                                         struct bpf_insn *dst,
883                                         struct bpf_prog *prog,
884                                         u32 *target_size);
885 
886 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
887                      void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
888 
889 /* an array of programs to be executed under rcu_lock.
890  *
891  * Typical usage:
892  * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
893  *
894  * the structure returned by bpf_prog_array_alloc() should be populated
895  * with program pointers and the last pointer must be NULL.
896  * The user has to keep refcnt on the program and make sure the program
897  * is removed from the array before bpf_prog_put().
898  * The 'struct bpf_prog_array *' should only be replaced with xchg()
899  * since other cpus are walking the array of pointers in parallel.
900  */
901 struct bpf_prog_array_item {
902         struct bpf_prog *prog;
903         struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
904 };
905 
906 struct bpf_prog_array {
907         struct rcu_head rcu;
908         struct bpf_prog_array_item items[];
909 };
910 
911 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
912 void bpf_prog_array_free(struct bpf_prog_array *progs);
913 int bpf_prog_array_length(struct bpf_prog_array *progs);
914 bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
915 int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
916                                 __u32 __user *prog_ids, u32 cnt);
917 
918 void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
919                                 struct bpf_prog *old_prog);
920 int bpf_prog_array_copy_info(struct bpf_prog_array *array,
921                              u32 *prog_ids, u32 request_cnt,
922                              u32 *prog_cnt);
923 int bpf_prog_array_copy(struct bpf_prog_array *old_array,
924                         struct bpf_prog *exclude_prog,
925                         struct bpf_prog *include_prog,
926                         struct bpf_prog_array **new_array);
927 
928 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null)  \
929         ({                                              \
930                 struct bpf_prog_array_item *_item;      \
931                 struct bpf_prog *_prog;                 \
932                 struct bpf_prog_array *_array;          \
933                 u32 _ret = 1;                           \
934                 migrate_disable();                      \
935                 rcu_read_lock();                        \
936                 _array = rcu_dereference(array);        \
937                 if (unlikely(check_non_null && !_array))\
938                         goto _out;                      \
939                 _item = &_array->items[0];              \
940                 while ((_prog = READ_ONCE(_item->prog))) {              \
941                         bpf_cgroup_storage_set(_item->cgroup_storage);  \
942                         _ret &= func(_prog, ctx);       \
943                         _item++;                        \
944                 }                                       \
945 _out:                                                   \
946                 rcu_read_unlock();                      \
947                 migrate_enable();                       \
948                 _ret;                                   \
949          })
950 
951 /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs
952  * so BPF programs can request cwr for TCP packets.
953  *
954  * Current cgroup skb programs can only return 0 or 1 (0 to drop the
955  * packet. This macro changes the behavior so the low order bit
956  * indicates whether the packet should be dropped (0) or not (1)
957  * and the next bit is a congestion notification bit. This could be
958  * used by TCP to call tcp_enter_cwr()
959  *
960  * Hence, new allowed return values of CGROUP EGRESS BPF programs are:
961  *   0: drop packet
962  *   1: keep packet
963  *   2: drop packet and cn
964  *   3: keep packet and cn
965  *
966  * This macro then converts it to one of the NET_XMIT or an error
967  * code that is then interpreted as drop packet (and no cn):
968  *   0: NET_XMIT_SUCCESS  skb should be transmitted
969  *   1: NET_XMIT_DROP     skb should be dropped and cn
970  *   2: NET_XMIT_CN       skb should be transmitted and cn
971  *   3: -EPERM            skb should be dropped
972  */
973 #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func)         \
974         ({                                              \
975                 struct bpf_prog_array_item *_item;      \
976                 struct bpf_prog *_prog;                 \
977                 struct bpf_prog_array *_array;          \
978                 u32 ret;                                \
979                 u32 _ret = 1;                           \
980                 u32 _cn = 0;                            \
981                 migrate_disable();                      \
982                 rcu_read_lock();                        \
983                 _array = rcu_dereference(array);        \
984                 _item = &_array->items[0];              \
985                 while ((_prog = READ_ONCE(_item->prog))) {              \
986                         bpf_cgroup_storage_set(_item->cgroup_storage);  \
987                         ret = func(_prog, ctx);         \
988                         _ret &= (ret & 1);              \
989                         _cn |= (ret & 2);               \
990                         _item++;                        \
991                 }                                       \
992                 rcu_read_unlock();                      \
993                 migrate_enable();                       \
994                 if (_ret)                               \
995                         _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS);  \
996                 else                                    \
997                         _ret = (_cn ? NET_XMIT_DROP : -EPERM);          \
998                 _ret;                                   \
999         })
1000 
1001 #define BPF_PROG_RUN_ARRAY(array, ctx, func)            \
1002         __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
1003 
1004 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func)      \
1005         __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
1006 
1007 #ifdef CONFIG_BPF_SYSCALL
1008 DECLARE_PER_CPU(int, bpf_prog_active);
1009 extern struct mutex bpf_stats_enabled_mutex;
1010 
1011 /*
1012  * Block execution of BPF programs attached to instrumentation (perf,
1013  * kprobes, tracepoints) to prevent deadlocks on map operations as any of
1014  * these events can happen inside a region which holds a map bucket lock
1015  * and can deadlock on it.
1016  *
1017  * Use the preemption safe inc/dec variants on RT because migrate disable
1018  * is preemptible on RT and preemption in the middle of the RMW operation
1019  * might lead to inconsistent state. Use the raw variants for non RT
1020  * kernels as migrate_disable() maps to preempt_disable() so the slightly
1021  * more expensive save operation can be avoided.
1022  */
1023 static inline void bpf_disable_instrumentation(void)
1024 {
1025         migrate_disable();
1026         if (IS_ENABLED(CONFIG_PREEMPT_RT))
1027                 this_cpu_inc(bpf_prog_active);
1028         else
1029                 __this_cpu_inc(bpf_prog_active);
1030 }
1031 
1032 static inline void bpf_enable_instrumentation(void)
1033 {
1034         if (IS_ENABLED(CONFIG_PREEMPT_RT))
1035                 this_cpu_dec(bpf_prog_active);
1036         else
1037                 __this_cpu_dec(bpf_prog_active);
1038         migrate_enable();
1039 }
1040 
1041 extern const struct file_operations bpf_map_fops;
1042 extern const struct file_operations bpf_prog_fops;
1043 extern const struct file_operations bpf_iter_fops;
1044 
1045 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
1046         extern const struct bpf_prog_ops _name ## _prog_ops; \
1047         extern const struct bpf_verifier_ops _name ## _verifier_ops;
1048 #define BPF_MAP_TYPE(_id, _ops) \
1049         extern const struct bpf_map_ops _ops;
1050 #define BPF_LINK_TYPE(_id, _name)
1051 #include <linux/bpf_types.h>
1052 #undef BPF_PROG_TYPE
1053 #undef BPF_MAP_TYPE
1054 #undef BPF_LINK_TYPE
1055 
1056 extern const struct bpf_prog_ops bpf_offload_prog_ops;
1057 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
1058 extern const struct bpf_verifier_ops xdp_analyzer_ops;
1059 
1060 struct bpf_prog *bpf_prog_get(u32 ufd);
1061 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
1062                                        bool attach_drv);
1063 void bpf_prog_add(struct bpf_prog *prog, int i);
1064 void bpf_prog_sub(struct bpf_prog *prog, int i);
1065 void bpf_prog_inc(struct bpf_prog *prog);
1066 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
1067 void bpf_prog_put(struct bpf_prog *prog);
1068 int __bpf_prog_charge(struct user_struct *user, u32 pages);
1069 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
1070 void __bpf_free_used_maps(struct bpf_prog_aux *aux,
1071                           struct bpf_map **used_maps, u32 len);
1072 
1073 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
1074 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
1075 
1076 struct bpf_map *bpf_map_get(u32 ufd);
1077 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
1078 struct bpf_map *__bpf_map_get(struct fd f);
1079 void bpf_map_inc(struct bpf_map *map);
1080 void bpf_map_inc_with_uref(struct bpf_map *map);
1081 struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
1082 void bpf_map_put_with_uref(struct bpf_map *map);
1083 void bpf_map_put(struct bpf_map *map);
1084 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
1085 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
1086 int bpf_map_charge_init(struct bpf_map_memory *mem, u64 size);
1087 void bpf_map_charge_finish(struct bpf_map_memory *mem);
1088 void bpf_map_charge_move(struct bpf_map_memory *dst,
1089                          struct bpf_map_memory *src);
1090 void *bpf_map_area_alloc(u64 size, int numa_node);
1091 void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
1092 void bpf_map_area_free(void *base);
1093 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
1094 int  generic_map_lookup_batch(struct bpf_map *map,
1095                               const union bpf_attr *attr,
1096                               union bpf_attr __user *uattr);
1097 int  generic_map_update_batch(struct bpf_map *map,
1098                               const union bpf_attr *attr,
1099                               union bpf_attr __user *uattr);
1100 int  generic_map_delete_batch(struct bpf_map *map,
1101                               const union bpf_attr *attr,
1102                               union bpf_attr __user *uattr);
1103 struct bpf_map *bpf_map_get_curr_or_next(u32 *id);
1104 
1105 extern int sysctl_unprivileged_bpf_disabled;
1106 
1107 static inline bool bpf_allow_ptr_leaks(void)
1108 {
1109         return perfmon_capable();
1110 }
1111 
1112 static inline bool bpf_bypass_spec_v1(void)
1113 {
1114         return perfmon_capable();
1115 }
1116 
1117 static inline bool bpf_bypass_spec_v4(void)
1118 {
1119         return perfmon_capable();
1120 }
1121 
1122 int bpf_map_new_fd(struct bpf_map *map, int flags);
1123 int bpf_prog_new_fd(struct bpf_prog *prog);
1124 
1125 struct bpf_link {
1126         atomic64_t refcnt;
1127         u32 id;
1128         enum bpf_link_type type;
1129         const struct bpf_link_ops *ops;
1130         struct bpf_prog *prog;
1131         struct work_struct work;
1132 };
1133 
1134 struct bpf_link_primer {
1135         struct bpf_link *link;
1136         struct file *file;
1137         int fd;
1138         u32 id;
1139 };
1140 
1141 struct bpf_link_ops {
1142         void (*release)(struct bpf_link *link);
1143         void (*dealloc)(struct bpf_link *link);
1144         int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog,
1145                            struct bpf_prog *old_prog);
1146         void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq);
1147         int (*fill_link_info)(const struct bpf_link *link,
1148                               struct bpf_link_info *info);
1149 };
1150 
1151 void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1152                    const struct bpf_link_ops *ops, struct bpf_prog *prog);
1153 int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer);
1154 int bpf_link_settle(struct bpf_link_primer *primer);
1155 void bpf_link_cleanup(struct bpf_link_primer *primer);
1156 void bpf_link_inc(struct bpf_link *link);
1157 void bpf_link_put(struct bpf_link *link);
1158 int bpf_link_new_fd(struct bpf_link *link);
1159 struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd);
1160 struct bpf_link *bpf_link_get_from_fd(u32 ufd);
1161 
1162 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
1163 int bpf_obj_get_user(const char __user *pathname, int flags);
1164 
1165 #define BPF_ITER_FUNC_PREFIX "bpf_iter_"
1166 #define DEFINE_BPF_ITER_FUNC(target, args...)                   \
1167         extern int bpf_iter_ ## target(args);                   \
1168         int __init bpf_iter_ ## target(args) { return 0; }
1169 
1170 typedef int (*bpf_iter_init_seq_priv_t)(void *private_data);
1171 typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data);
1172 
1173 #define BPF_ITER_CTX_ARG_MAX 2
1174 struct bpf_iter_reg {
1175         const char *target;
1176         const struct seq_operations *seq_ops;
1177         bpf_iter_init_seq_priv_t init_seq_private;
1178         bpf_iter_fini_seq_priv_t fini_seq_private;
1179         u32 seq_priv_size;
1180         u32 ctx_arg_info_size;
1181         struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX];
1182 };
1183 
1184 struct bpf_iter_meta {
1185         __bpf_md_ptr(struct seq_file *, seq);
1186         u64 session_id;
1187         u64 seq_num;
1188 };
1189 
1190 int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info);
1191 void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info);
1192 bool bpf_iter_prog_supported(struct bpf_prog *prog);
1193 int bpf_iter_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
1194 int bpf_iter_new_fd(struct bpf_link *link);
1195 bool bpf_link_is_iter(struct bpf_link *link);
1196 struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop);
1197 int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx);
1198 
1199 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
1200 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
1201 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
1202                            u64 flags);
1203 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
1204                             u64 flags);
1205 
1206 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
1207 
1208 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
1209                                  void *key, void *value, u64 map_flags);
1210 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1211 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
1212                                 void *key, void *value, u64 map_flags);
1213 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1214 
1215 int bpf_get_file_flag(int flags);
1216 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
1217                              size_t actual_size);
1218 
1219 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
1220  * forced to use 'long' read/writes to try to atomically copy long counters.
1221  * Best-effort only.  No barriers here, since it _will_ race with concurrent
1222  * updates from BPF programs. Called from bpf syscall and mostly used with
1223  * size 8 or 16 bytes, so ask compiler to inline it.
1224  */
1225 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
1226 {
1227         const long *lsrc = src;
1228         long *ldst = dst;
1229 
1230         size /= sizeof(long);
1231         while (size--)
1232                 *ldst++ = *lsrc++;
1233 }
1234 
1235 /* verify correctness of eBPF program */
1236 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
1237               union bpf_attr __user *uattr);
1238 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
1239 
1240 /* Map specifics */
1241 struct xdp_buff;
1242 struct sk_buff;
1243 
1244 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
1245 struct bpf_dtab_netdev *__dev_map_hash_lookup_elem(struct bpf_map *map, u32 key);
1246 void __dev_flush(void);
1247 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1248                     struct net_device *dev_rx);
1249 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1250                     struct net_device *dev_rx);
1251 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
1252                              struct bpf_prog *xdp_prog);
1253 bool dev_map_can_have_prog(struct bpf_map *map);
1254 
1255 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
1256 void __cpu_map_flush(void);
1257 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
1258                     struct net_device *dev_rx);
1259 
1260 /* Return map's numa specified by userspace */
1261 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
1262 {
1263         return (attr->map_flags & BPF_F_NUMA_NODE) ?
1264                 attr->numa_node : NUMA_NO_NODE;
1265 }
1266 
1267 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
1268 int array_map_alloc_check(union bpf_attr *attr);
1269 
1270 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
1271                           union bpf_attr __user *uattr);
1272 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
1273                           union bpf_attr __user *uattr);
1274 int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1275                               const union bpf_attr *kattr,
1276                               union bpf_attr __user *uattr);
1277 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1278                                      const union bpf_attr *kattr,
1279                                      union bpf_attr __user *uattr);
1280 bool btf_ctx_access(int off, int size, enum bpf_access_type type,
1281                     const struct bpf_prog *prog,
1282                     struct bpf_insn_access_aux *info);
1283 int btf_struct_access(struct bpf_verifier_log *log,
1284                       const struct btf_type *t, int off, int size,
1285                       enum bpf_access_type atype,
1286                       u32 *next_btf_id);
1287 int btf_resolve_helper_id(struct bpf_verifier_log *log,
1288                           const struct bpf_func_proto *fn, int);
1289 
1290 int btf_distill_func_proto(struct bpf_verifier_log *log,
1291                            struct btf *btf,
1292                            const struct btf_type *func_proto,
1293                            const char *func_name,
1294                            struct btf_func_model *m);
1295 
1296 struct bpf_reg_state;
1297 int btf_check_func_arg_match(struct bpf_verifier_env *env, int subprog,
1298                              struct bpf_reg_state *regs);
1299 int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog,
1300                           struct bpf_reg_state *reg);
1301 int btf_check_type_match(struct bpf_verifier_env *env, struct bpf_prog *prog,
1302                          struct btf *btf, const struct btf_type *t);
1303 
1304 struct bpf_prog *bpf_prog_by_id(u32 id);
1305 
1306 const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id);
1307 #else /* !CONFIG_BPF_SYSCALL */
1308 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
1309 {
1310         return ERR_PTR(-EOPNOTSUPP);
1311 }
1312 
1313 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
1314                                                      enum bpf_prog_type type,
1315                                                      bool attach_drv)
1316 {
1317         return ERR_PTR(-EOPNOTSUPP);
1318 }
1319 
1320 static inline void bpf_prog_add(struct bpf_prog *prog, int i)
1321 {
1322 }
1323 
1324 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
1325 {
1326 }
1327 
1328 static inline void bpf_prog_put(struct bpf_prog *prog)
1329 {
1330 }
1331 
1332 static inline void bpf_prog_inc(struct bpf_prog *prog)
1333 {
1334 }
1335 
1336 static inline struct bpf_prog *__must_check
1337 bpf_prog_inc_not_zero(struct bpf_prog *prog)
1338 {
1339         return ERR_PTR(-EOPNOTSUPP);
1340 }
1341 
1342 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
1343 {
1344         return 0;
1345 }
1346 
1347 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
1348 {
1349 }
1350 
1351 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
1352 {
1353         return -EOPNOTSUPP;
1354 }
1355 
1356 static inline struct net_device  *__dev_map_lookup_elem(struct bpf_map *map,
1357                                                        u32 key)
1358 {
1359         return NULL;
1360 }
1361 
1362 static inline struct net_device  *__dev_map_hash_lookup_elem(struct bpf_map *map,
1363                                                              u32 key)
1364 {
1365         return NULL;
1366 }
1367 static inline bool dev_map_can_have_prog(struct bpf_map *map)
1368 {
1369         return false;
1370 }
1371 
1372 static inline void __dev_flush(void)
1373 {
1374 }
1375 
1376 struct xdp_buff;
1377 struct bpf_dtab_netdev;
1378 
1379 static inline
1380 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1381                     struct net_device *dev_rx)
1382 {
1383         return 0;
1384 }
1385 
1386 static inline
1387 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1388                     struct net_device *dev_rx)
1389 {
1390         return 0;
1391 }
1392 
1393 struct sk_buff;
1394 
1395 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
1396                                            struct sk_buff *skb,
1397                                            struct bpf_prog *xdp_prog)
1398 {
1399         return 0;
1400 }
1401 
1402 static inline
1403 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
1404 {
1405         return NULL;
1406 }
1407 
1408 static inline void __cpu_map_flush(void)
1409 {
1410 }
1411 
1412 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
1413                                   struct xdp_buff *xdp,
1414                                   struct net_device *dev_rx)
1415 {
1416         return 0;
1417 }
1418 
1419 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
1420                                 enum bpf_prog_type type)
1421 {
1422         return ERR_PTR(-EOPNOTSUPP);
1423 }
1424 
1425 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
1426                                         const union bpf_attr *kattr,
1427                                         union bpf_attr __user *uattr)
1428 {
1429         return -ENOTSUPP;
1430 }
1431 
1432 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
1433                                         const union bpf_attr *kattr,
1434                                         union bpf_attr __user *uattr)
1435 {
1436         return -ENOTSUPP;
1437 }
1438 
1439 static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1440                                             const union bpf_attr *kattr,
1441                                             union bpf_attr __user *uattr)
1442 {
1443         return -ENOTSUPP;
1444 }
1445 
1446 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1447                                                    const union bpf_attr *kattr,
1448                                                    union bpf_attr __user *uattr)
1449 {
1450         return -ENOTSUPP;
1451 }
1452 
1453 static inline void bpf_map_put(struct bpf_map *map)
1454 {
1455 }
1456 
1457 static inline struct bpf_prog *bpf_prog_by_id(u32 id)
1458 {
1459         return ERR_PTR(-ENOTSUPP);
1460 }
1461 
1462 static inline const struct bpf_func_proto *
1463 bpf_base_func_proto(enum bpf_func_id func_id)
1464 {
1465         return NULL;
1466 }
1467 #endif /* CONFIG_BPF_SYSCALL */
1468 
1469 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
1470                                                  enum bpf_prog_type type)
1471 {
1472         return bpf_prog_get_type_dev(ufd, type, false);
1473 }
1474 
1475 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
1476 
1477 int bpf_prog_offload_compile(struct bpf_prog *prog);
1478 void bpf_prog_offload_destroy(struct bpf_prog *prog);
1479 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
1480                                struct bpf_prog *prog);
1481 
1482 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
1483 
1484 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
1485 int bpf_map_offload_update_elem(struct bpf_map *map,
1486                                 void *key, void *value, u64 flags);
1487 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
1488 int bpf_map_offload_get_next_key(struct bpf_map *map,
1489                                  void *key, void *next_key);
1490 
1491 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
1492 
1493 struct bpf_offload_dev *
1494 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
1495 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
1496 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
1497 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
1498                                     struct net_device *netdev);
1499 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
1500                                        struct net_device *netdev);
1501 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
1502 
1503 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
1504 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
1505 
1506 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
1507 {
1508         return aux->offload_requested;
1509 }
1510 
1511 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1512 {
1513         return unlikely(map->ops == &bpf_map_offload_ops);
1514 }
1515 
1516 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
1517 void bpf_map_offload_map_free(struct bpf_map *map);
1518 #else
1519 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
1520                                         union bpf_attr *attr)
1521 {
1522         return -EOPNOTSUPP;
1523 }
1524 
1525 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
1526 {
1527         return false;
1528 }
1529 
1530 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1531 {
1532         return false;
1533 }
1534 
1535 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
1536 {
1537         return ERR_PTR(-EOPNOTSUPP);
1538 }
1539 
1540 static inline void bpf_map_offload_map_free(struct bpf_map *map)
1541 {
1542 }
1543 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
1544 
1545 #if defined(CONFIG_BPF_STREAM_PARSER)
1546 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog,
1547                          struct bpf_prog *old, u32 which);
1548 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
1549 int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
1550 void sock_map_unhash(struct sock *sk);
1551 void sock_map_close(struct sock *sk, long timeout);
1552 #else
1553 static inline int sock_map_prog_update(struct bpf_map *map,
1554                                        struct bpf_prog *prog,
1555                                        struct bpf_prog *old, u32 which)
1556 {
1557         return -EOPNOTSUPP;
1558 }
1559 
1560 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
1561                                        struct bpf_prog *prog)
1562 {
1563         return -EINVAL;
1564 }
1565 
1566 static inline int sock_map_prog_detach(const union bpf_attr *attr,
1567                                        enum bpf_prog_type ptype)
1568 {
1569         return -EOPNOTSUPP;
1570 }
1571 #endif /* CONFIG_BPF_STREAM_PARSER */
1572 
1573 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
1574 void bpf_sk_reuseport_detach(struct sock *sk);
1575 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
1576                                        void *value);
1577 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
1578                                        void *value, u64 map_flags);
1579 #else
1580 static inline void bpf_sk_reuseport_detach(struct sock *sk)
1581 {
1582 }
1583 
1584 #ifdef CONFIG_BPF_SYSCALL
1585 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
1586                                                      void *key, void *value)
1587 {
1588         return -EOPNOTSUPP;
1589 }
1590 
1591 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
1592                                                      void *key, void *value,
1593                                                      u64 map_flags)
1594 {
1595         return -EOPNOTSUPP;
1596 }
1597 #endif /* CONFIG_BPF_SYSCALL */
1598 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
1599 
1600 /* verifier prototypes for helper functions called from eBPF programs */
1601 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
1602 extern const struct bpf_func_proto bpf_map_update_elem_proto;
1603 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
1604 extern const struct bpf_func_proto bpf_map_push_elem_proto;
1605 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
1606 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
1607 
1608 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
1609 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
1610 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
1611 extern const struct bpf_func_proto bpf_tail_call_proto;
1612 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
1613 extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto;
1614 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
1615 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
1616 extern const struct bpf_func_proto bpf_get_current_comm_proto;
1617 extern const struct bpf_func_proto bpf_get_stackid_proto;
1618 extern const struct bpf_func_proto bpf_get_stack_proto;
1619 extern const struct bpf_func_proto bpf_sock_map_update_proto;
1620 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
1621 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
1622 extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto;
1623 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
1624 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
1625 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
1626 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
1627 extern const struct bpf_func_proto bpf_spin_lock_proto;
1628 extern const struct bpf_func_proto bpf_spin_unlock_proto;
1629 extern const struct bpf_func_proto bpf_get_local_storage_proto;
1630 extern const struct bpf_func_proto bpf_strtol_proto;
1631 extern const struct bpf_func_proto bpf_strtoul_proto;
1632 extern const struct bpf_func_proto bpf_tcp_sock_proto;
1633 extern const struct bpf_func_proto bpf_jiffies64_proto;
1634 extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
1635 extern const struct bpf_func_proto bpf_event_output_data_proto;
1636 extern const struct bpf_func_proto bpf_ringbuf_output_proto;
1637 extern const struct bpf_func_proto bpf_ringbuf_reserve_proto;
1638 extern const struct bpf_func_proto bpf_ringbuf_submit_proto;
1639 extern const struct bpf_func_proto bpf_ringbuf_discard_proto;
1640 extern const struct bpf_func_proto bpf_ringbuf_query_proto;
1641 
1642 const struct bpf_func_proto *bpf_tracing_func_proto(
1643         enum bpf_func_id func_id, const struct bpf_prog *prog);
1644 
1645 const struct bpf_func_proto *tracing_prog_func_proto(
1646   enum bpf_func_id func_id, const struct bpf_prog *prog);
1647 
1648 /* Shared helpers among cBPF and eBPF. */
1649 void bpf_user_rnd_init_once(void);
1650 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1651 u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1652 
1653 #if defined(CONFIG_NET)
1654 bool bpf_sock_common_is_valid_access(int off, int size,
1655                                      enum bpf_access_type type,
1656                                      struct bpf_insn_access_aux *info);
1657 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1658                               struct bpf_insn_access_aux *info);
1659 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1660                                 const struct bpf_insn *si,
1661                                 struct bpf_insn *insn_buf,
1662                                 struct bpf_prog *prog,
1663                                 u32 *target_size);
1664 #else
1665 static inline bool bpf_sock_common_is_valid_access(int off, int size,
1666                                                    enum bpf_access_type type,
1667                                                    struct bpf_insn_access_aux *info)
1668 {
1669         return false;
1670 }
1671 static inline bool bpf_sock_is_valid_access(int off, int size,
1672                                             enum bpf_access_type type,
1673                                             struct bpf_insn_access_aux *info)
1674 {
1675         return false;
1676 }
1677 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1678                                               const struct bpf_insn *si,
1679                                               struct bpf_insn *insn_buf,
1680                                               struct bpf_prog *prog,
1681                                               u32 *target_size)
1682 {
1683         return 0;
1684 }
1685 #endif
1686 
1687 #ifdef CONFIG_INET
1688 struct sk_reuseport_kern {
1689         struct sk_buff *skb;
1690         struct sock *sk;
1691         struct sock *selected_sk;
1692         void *data_end;
1693         u32 hash;
1694         u32 reuseport_id;
1695         bool bind_inany;
1696 };
1697 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1698                                   struct bpf_insn_access_aux *info);
1699 
1700 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1701                                     const struct bpf_insn *si,
1702                                     struct bpf_insn *insn_buf,
1703                                     struct bpf_prog *prog,
1704                                     u32 *target_size);
1705 
1706 bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1707                                   struct bpf_insn_access_aux *info);
1708 
1709 u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
1710                                     const struct bpf_insn *si,
1711                                     struct bpf_insn *insn_buf,
1712                                     struct bpf_prog *prog,
1713                                     u32 *target_size);
1714 #else
1715 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
1716                                                 enum bpf_access_type type,
1717                                                 struct bpf_insn_access_aux *info)
1718 {
1719         return false;
1720 }
1721 
1722 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1723                                                   const struct bpf_insn *si,
1724                                                   struct bpf_insn *insn_buf,
1725                                                   struct bpf_prog *prog,
1726                                                   u32 *target_size)
1727 {
1728         return 0;
1729 }
1730 static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
1731                                                 enum bpf_access_type type,
1732                                                 struct bpf_insn_access_aux *info)
1733 {
1734         return false;
1735 }
1736 
1737 static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
1738                                                   const struct bpf_insn *si,
1739                                                   struct bpf_insn *insn_buf,
1740                                                   struct bpf_prog *prog,
1741                                                   u32 *target_size)
1742 {
1743         return 0;
1744 }
1745 #endif /* CONFIG_INET */
1746 
1747 enum bpf_text_poke_type {
1748         BPF_MOD_CALL,
1749         BPF_MOD_JUMP,
1750 };
1751 
1752 int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
1753                        void *addr1, void *addr2);
1754 
1755 #endif /* _LINUX_BPF_H */
1756 

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