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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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SPDX-License-Identifier: GPL-2.0-only *//* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com */#ifndef _LINUX_BPF_H#define _LINUX_BPF_H 1
#include <uapi/linux/bpf.h>#include <uapi/linux/filter.h>#include <linux/bpf_defs.h>
#include <crypto/sha2.h>#include <linux/workqueue.h>#include <linux/file.h>#include <linux/percpu.h>#include <linux/err.h>#include <linux/rbtree_latch.h>#include <linux/numa.h>#include <linux/mm_types.h>#include <linux/wait.h>#include <linux/refcount.h>#include <linux/mutex.h>#include <linux/module.h>#include <linux/kallsyms.h>#include <linux/capability.h>#include <linux/sched/mm.h>#include <linux/slab.h>#include <linux/percpu-refcount.h>#include <linux/stddef.h>#include <linux/bpfptr.h>#include <linux/btf.h>#include <linux/rcupdate_trace.h>#include <linux/static_call.h>#include <linux/memcontrol.h>#include <linux/cfi.h>#include <linux/xattr.h>#include <linux/key.h>#include <linux/ftrace.h>#include <asm/rqspinlock.h>
struct bpf_verifier_env;struct bpf_verifier_log;struct perf_event;struct bpf_prog;struct bpf_prog_aux;struct bpf_map;struct bpf_arena;struct sock;struct seq_file;struct btf;struct btf_type;struct exception_table_entry;struct seq_operations;struct bpf_iter_aux_info;struct bpf_local_storage;struct bpf_local_storage_map;struct kobject;struct mem_cgroup;struct module;struct bpf_func_state;struct ftrace_ops;struct cgroup;struct bpf_token;struct user_namespace;struct super_block;struct inode;
extern struct idr btf_idr;extern spinlock_t btf_idr_lock;extern struct kobject *btf_kobj;extern struct bpf_mem_alloc bpf_global_ma, bpf_global_percpu_ma;extern bool bpf_global_ma_set;
typedef u64 (*bpf_callback_t)(u64, u64, u64, u64, u64);typedef int (*bpf_iter_init_seq_priv_t)(void *private_data, struct bpf_iter_aux_info *aux);typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data);typedef unsigned int (*bpf_func_t)(const void *, const struct bpf_insn *);struct bpf_iter_seq_info { const struct seq_operations *seq_ops; bpf_iter_init_seq_priv_t init_seq_private; bpf_iter_fini_seq_priv_t fini_seq_private; u32 seq_priv_size;};
/* map is generic key/value storage optionally accessible by eBPF programs */struct bpf_map_ops { /* funcs callable from userspace (via syscall) */ int (*map_alloc_check)(union bpf_attr *attr); struct bpf_map *(*map_alloc)(union bpf_attr *attr); void (*map_release)(struct bpf_map *map, struct file *map_file); void (*map_free)(struct bpf_map *map); int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key); void (*map_release_uref)(struct bpf_map *map); void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key); int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr, union bpf_attr __user *uattr); int (*map_lookup_and_delete_elem)(struct bpf_map *map, void *key, void *value, u64 flags); int (*map_lookup_and_delete_batch)(struct bpf_map *map, const union bpf_attr *attr, union bpf_attr __user *uattr); int (*map_update_batch)(struct bpf_map *map, struct file *map_file, const union bpf_attr *attr, union bpf_attr __user *uattr); int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr, union bpf_attr __user *uattr);
/* funcs callable from userspace and from eBPF programs */ void *(*map_lookup_elem)(struct bpf_map *map, void *key); long (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags); long (*map_delete_elem)(struct bpf_map *map, void *key); long (*map_push_elem)(struct bpf_map *map, void *value, u64 flags); long (*map_pop_elem)(struct bpf_map *map, void *value); long (*map_peek_elem)(struct bpf_map *map, void *value); void *(*map_lookup_percpu_elem)(struct bpf_map *map, void *key, u32 cpu); int (*map_get_hash)(struct bpf_map *map);
/* funcs called by prog_array and perf_event_array map */ void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file, int fd); /* If need_defer is true, the implementation should guarantee that * the to-be-put element is still alive before the bpf program, which * may manipulate it, exists. */ void (*map_fd_put_ptr)(struct bpf_map *map, void *ptr, bool need_defer); int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf); u32 (*map_fd_sys_lookup_elem)(void *ptr); void (*map_seq_show_elem)(struct bpf_map *map, void *key, struct seq_file *m); int (*map_check_btf)(struct bpf_map *map, const struct btf *btf, const struct btf_type *key_type, const struct btf_type *value_type);
/* Prog poke tracking helpers. */ int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux); void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux); void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old, struct bpf_prog *new);
/* Direct value access helpers. */ int (*map_direct_value_addr)(const struct bpf_map *map, u64 *imm, u32 off); int (*map_direct_value_meta)(const struct bpf_map *map, u64 imm, u32 *off); int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma); __poll_t (*map_poll)(struct bpf_map *map, struct file *filp, struct poll_table_struct *pts); unsigned long (*map_get_unmapped_area)(struct file *filep, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags);
/* Functions called by bpf_local_storage maps */ int (*map_local_storage_charge)(struct bpf_local_storage_map *smap, void *owner, u32 size); void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap, void *owner, u32 size); struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner);
/* Misc helpers.*/ long (*map_redirect)(struct bpf_map *map, u64 key, u64 flags);
/* map_meta_equal must be implemented for maps that can be * used as an inner map. It is a runtime check to ensure * an inner map can be inserted to an outer map. * * Some properties of the inner map has been used during the * verification time. When inserting an inner map at the runtime, * map_meta_equal has to ensure the inserting map has the same * properties that the verifier has used earlier. */ bool (*map_meta_equal)(const struct bpf_map *meta0, const struct bpf_map *meta1);
int (*map_set_for_each_callback_args)(struct bpf_verifier_env *env, struct bpf_func_state *caller, struct bpf_func_state *callee); long (*map_for_each_callback)(struct bpf_map *map, bpf_callback_t callback_fn, void *callback_ctx, u64 flags);
u64 (*map_mem_usage)(const struct bpf_map *map);
/* BTF id of struct allocated by map_alloc */ int *map_btf_id;
/* bpf_iter info used to open a seq_file */ const struct bpf_iter_seq_info *iter_seq_info;};
enum { /* Support at most 11 fields in a BTF type */ BTF_FIELDS_MAX = 11,};
enum btf_field_type { BPF_SPIN_LOCK = (1 << 0), BPF_TIMER = (1 << 1), BPF_KPTR_UNREF = (1 << 2), BPF_KPTR_REF = (1 << 3), BPF_KPTR_PERCPU = (1 << 4), BPF_KPTR = BPF_KPTR_UNREF | BPF_KPTR_REF | BPF_KPTR_PERCPU, BPF_LIST_HEAD = (1 << 5), BPF_LIST_NODE = (1 << 6), BPF_RB_ROOT = (1 << 7), BPF_RB_NODE = (1 << 8), BPF_GRAPH_NODE = BPF_RB_NODE | BPF_LIST_NODE, BPF_GRAPH_ROOT = BPF_RB_ROOT | BPF_LIST_HEAD, BPF_REFCOUNT = (1 << 9), BPF_WORKQUEUE = (1 << 10), BPF_UPTR = (1 << 11), BPF_RES_SPIN_LOCK = (1 << 12), BPF_TASK_WORK = (1 << 13),};
enum bpf_cgroup_storage_type { BPF_CGROUP_STORAGE_SHARED, BPF_CGROUP_STORAGE_PERCPU, __BPF_CGROUP_STORAGE_MAX#define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX};
#ifdef CONFIG_CGROUP_BPF# define for_each_cgroup_storage_type(stype) \ for (stype = 0; stype < MAX_BPF_CGROUP_STORAGE_TYPE; stype++)#else# define for_each_cgroup_storage_type(stype) for (; false; )#endif /* CONFIG_CGROUP_BPF */
typedef void (*btf_dtor_kfunc_t)(void *);
struct btf_field_kptr { struct btf *btf; struct module *module; /* dtor used if btf_is_kernel(btf), otherwise the type is * program-allocated, dtor is NULL, and __bpf_obj_drop_impl is used */ btf_dtor_kfunc_t dtor; u32 btf_id;};
struct btf_field_graph_root { struct btf *btf; u32 value_btf_id; u32 node_offset; struct btf_record *value_rec;};
struct btf_field { u32 offset; u32 size; enum btf_field_type type; union { struct btf_field_kptr kptr; struct btf_field_graph_root graph_root; };};
struct btf_record { u32 cnt; u32 field_mask; int spin_lock_off; int res_spin_lock_off; int timer_off; int wq_off; int refcount_off; int task_work_off; struct btf_field fields[];};
/* Non-opaque version of bpf_rb_node in uapi/linux/bpf.h */struct bpf_rb_node_kern { struct rb_node rb_node; void *owner;} __attribute__((aligned(8)));
/* Non-opaque version of bpf_list_node in uapi/linux/bpf.h */struct bpf_list_node_kern { struct list_head list_head; void *owner;} __attribute__((aligned(8)));
/* 'Ownership' of program-containing map is claimed by the first program * that is going to use this map or by the first program which FD is * stored in the map to make sure that all callers and callees have the * same prog type, JITed flag and xdp_has_frags flag. */struct bpf_map_owner { enum bpf_prog_type type; bool jited; bool xdp_has_frags; bool sleepable; u64 storage_cookie[MAX_BPF_CGROUP_STORAGE_TYPE]; const struct btf_type *attach_func_proto; enum bpf_attach_type expected_attach_type;};
struct bpf_map { u8 sha[SHA256_DIGEST_SIZE]; u32 excl; const struct bpf_map_ops *ops; struct bpf_map *inner_map_meta;#ifdef CONFIG_SECURITY void *security;#endif enum bpf_map_type map_type; u32 key_size; u32 value_size; u32 max_entries; u64 map_extra; /* any per-map-type extra fields */ u32 map_flags; u32 id; struct btf_record *record; int numa_node; u32 btf_key_type_id; u32 btf_value_type_id; u32 btf_vmlinux_value_type_id; struct btf *btf;#ifdef CONFIG_MEMCG struct obj_cgroup *objcg;#endif char name[BPF_OBJ_NAME_LEN]; struct mutex freeze_mutex; atomic64_t refcnt; atomic64_t usercnt; /* rcu is used before freeing and work is only used during freeing */ union { struct work_struct work; struct rcu_head rcu; }; atomic64_t writecnt; spinlock_t owner_lock; struct bpf_map_owner *owner; bool bypass_spec_v1; bool frozen; /* write-once; write-protected by freeze_mutex */ bool free_after_mult_rcu_gp; bool free_after_rcu_gp; atomic64_t sleepable_refcnt; s64 __percpu *elem_count; u64 cookie; /* write-once */ char *excl_prog_sha;};
static inline const char *btf_field_type_name(enum btf_field_type type){ switch (type) { case BPF_SPIN_LOCK: return "bpf_spin_lock"; case BPF_RES_SPIN_LOCK: return "bpf_res_spin_lock"; case BPF_TIMER: return "bpf_timer"; case BPF_WORKQUEUE: return "bpf_wq"; case BPF_KPTR_UNREF: case BPF_KPTR_REF: return "kptr"; case BPF_KPTR_PERCPU: return "percpu_kptr"; case BPF_UPTR: return "uptr"; case BPF_LIST_HEAD: return "bpf_list_head"; case BPF_LIST_NODE: return "bpf_list_node"; case BPF_RB_ROOT: return "bpf_rb_root"; case BPF_RB_NODE: return "bpf_rb_node"; case BPF_REFCOUNT: return "bpf_refcount"; case BPF_TASK_WORK: return "bpf_task_work"; default: WARN_ON_ONCE(1); return "unknown"; }}
#if IS_ENABLED(CONFIG_DEBUG_KERNEL)#define BPF_WARN_ONCE(cond, format...) WARN_ONCE(cond, format)#else#define BPF_WARN_ONCE(cond, format...) BUILD_BUG_ON_INVALID(cond)#endif
static inline u32 btf_field_type_size(enum btf_field_type type){ switch (type) { case BPF_SPIN_LOCK: return sizeof(struct bpf_spin_lock); case BPF_RES_SPIN_LOCK: return sizeof(struct bpf_res_spin_lock); case BPF_TIMER: return sizeof(struct bpf_timer); case BPF_WORKQUEUE: return sizeof(struct bpf_wq); case BPF_KPTR_UNREF: case BPF_KPTR_REF: case BPF_KPTR_PERCPU: case BPF_UPTR: return sizeof(u64); case BPF_LIST_HEAD: return sizeof(struct bpf_list_head); case BPF_LIST_NODE: return sizeof(struct bpf_list_node); case BPF_RB_ROOT: return sizeof(struct bpf_rb_root); case BPF_RB_NODE: return sizeof(struct bpf_rb_node); case BPF_REFCOUNT: return sizeof(struct bpf_refcount); case BPF_TASK_WORK: return sizeof(struct bpf_task_work); default: WARN_ON_ONCE(1); return 0; }}
static inline u32 btf_field_type_align(enum btf_field_type type){ switch (type) { case BPF_SPIN_LOCK: return __alignof__(struct bpf_spin_lock); case BPF_RES_SPIN_LOCK: return __alignof__(struct bpf_res_spin_lock); case BPF_TIMER: return __alignof__(struct bpf_timer); case BPF_WORKQUEUE: return __alignof__(struct bpf_wq); case BPF_KPTR_UNREF: case BPF_KPTR_REF: case BPF_KPTR_PERCPU: case BPF_UPTR: return __alignof__(u64); case BPF_LIST_HEAD: return __alignof__(struct bpf_list_head); case BPF_LIST_NODE: return __alignof__(struct bpf_list_node); case BPF_RB_ROOT: return __alignof__(struct bpf_rb_root); case BPF_RB_NODE: return __alignof__(struct bpf_rb_node); case BPF_REFCOUNT: return __alignof__(struct bpf_refcount); case BPF_TASK_WORK: return __alignof__(struct bpf_task_work); default: WARN_ON_ONCE(1); return 0; }}
static inline void bpf_obj_init_field(const struct btf_field *field, void *addr){ memset(addr, 0, field->size);
switch (field->type) { case BPF_REFCOUNT: refcount_set((refcount_t *)addr, 1); break; case BPF_RB_NODE: RB_CLEAR_NODE((struct rb_node *)addr); break; case BPF_LIST_HEAD: case BPF_LIST_NODE: INIT_LIST_HEAD((struct list_head *)addr); break; case BPF_RB_ROOT: /* RB_ROOT_CACHED 0-inits, no need to do anything after memset */ case BPF_SPIN_LOCK: case BPF_RES_SPIN_LOCK: case BPF_TIMER: case BPF_WORKQUEUE: case BPF_KPTR_UNREF: case BPF_KPTR_REF: case BPF_KPTR_PERCPU: case BPF_UPTR: case BPF_TASK_WORK: break; default: WARN_ON_ONCE(1); return; }}
static inline bool btf_record_has_field(const struct btf_record *rec, enum btf_field_type type){ if (IS_ERR_OR_NULL(rec)) return false; return rec->field_mask & type;}
static inline bool btf_field_is_nmi_safe(enum btf_field_type type){ switch (type) { case BPF_SPIN_LOCK: case BPF_RES_SPIN_LOCK: case BPF_TIMER: case BPF_WORKQUEUE: case BPF_TASK_WORK: case BPF_KPTR_UNREF: case BPF_REFCOUNT: return true; default: return false; }}
static inline bool btf_record_has_nmi_unsafe_fields(const struct btf_record *rec){ int i;
if (IS_ERR_OR_NULL(rec)) return false; for (i = 0; i < rec->cnt; i++) { if (!btf_field_is_nmi_safe(rec->fields[i].type)) return true; } return false;}
static inline void bpf_obj_init(const struct btf_record *rec, void *obj){ int i;
if (IS_ERR_OR_NULL(rec)) return; for (i = 0; i < rec->cnt; i++) bpf_obj_init_field(&rec->fields[i], obj + rec->fields[i].offset);}
/* 'dst' must be a temporary buffer and should not point to memory that is being * used in parallel by a bpf program or bpf syscall, otherwise the access from * the bpf program or bpf syscall may be corrupted by the reinitialization, * leading to weird problems. Even 'dst' is newly-allocated from bpf memory * allocator, it is still possible for 'dst' to be used in parallel by a bpf * program or bpf syscall. */static inline void check_and_init_map_value(struct bpf_map *map, void *dst){ bpf_obj_init(map->record, dst);}
/* memcpy that is used with 8-byte aligned pointers, power-of-8 size and * forced to use 'long' read/writes to try to atomically copy long counters. * Best-effort only. No barriers here, since it _will_ race with concurrent * updates from BPF programs. Called from bpf syscall and mostly used with * size 8 or 16 bytes, so ask compiler to inline it. */static inline void bpf_long_memcpy(void *dst, const void *src, u32 size){ const long *lsrc = src; long *ldst = dst;
size /= sizeof(long); while (size--) data_race(*ldst++ = *lsrc++);}
/* copy everything but bpf_spin_lock, bpf_timer, and kptrs. There could be one of each. */static inline void bpf_obj_memcpy(struct btf_record *rec, void *dst, void *src, u32 size, bool long_memcpy){ u32 curr_off = 0; int i;
if (IS_ERR_OR_NULL(rec)) { if (long_memcpy) bpf_long_memcpy(dst, src, round_up(size, 8)); else memcpy(dst, src, size); return; }
for (i = 0; i < rec->cnt; i++) { u32 next_off = rec->fields[i].offset; u32 sz = next_off - curr_off;
memcpy(dst + curr_off, src + curr_off, sz); curr_off += rec->fields[i].size + sz; } memcpy(dst + curr_off, src + curr_off, size - curr_off);}
static inline void copy_map_value(struct bpf_map *map, void *dst, void *src){ bpf_obj_memcpy(map->record, dst, src, map->value_size, false);}
static inline void copy_map_value_long(struct bpf_map *map, void *dst, void *src){ bpf_obj_memcpy(map->record, dst, src, map->value_size, true);}
static inline void bpf_obj_swap_uptrs(const struct btf_record *rec, void *dst, void *src){ unsigned long *src_uptr, *dst_uptr; const struct btf_field *field; int i;
if (!btf_record_has_field(rec, BPF_UPTR)) return;
for (i = 0, field = rec->fields; i < rec->cnt; i++, field++) { if (field->type != BPF_UPTR) continue;
src_uptr = src + field->offset; dst_uptr = dst + field->offset; swap(*src_uptr, *dst_uptr); }}
static inline void bpf_obj_memzero(struct btf_record *rec, void *dst, u32 size){ u32 curr_off = 0; int i;
if (IS_ERR_OR_NULL(rec)) { memset(dst, 0, size); return; }
for (i = 0; i < rec->cnt; i++) { u32 next_off = rec->fields[i].offset; u32 sz = next_off - curr_off;
memset(dst + curr_off, 0, sz); curr_off += rec->fields[i].size + sz; } memset(dst + curr_off, 0, size - curr_off);}
static inline void zero_map_value(struct bpf_map *map, void *dst){ bpf_obj_memzero(map->record, dst, map->value_size);}
void copy_map_value_locked(struct bpf_map *map, void *dst, void *src, bool lock_src);void bpf_timer_cancel_and_free(void *timer);void bpf_wq_cancel_and_free(void *timer);void bpf_task_work_cancel_and_free(void *timer);void bpf_list_head_free(const struct btf_field *field, void *list_head, struct bpf_spin_lock *spin_lock);void bpf_rb_root_free(const struct btf_field *field, void *rb_root, struct bpf_spin_lock *spin_lock);u64 bpf_arena_get_kern_vm_start(struct bpf_arena *arena);u64 bpf_arena_get_user_vm_start(struct bpf_arena *arena);u64 bpf_arena_map_kern_vm_start(struct bpf_map *map);struct bpf_map *bpf_prog_arena(struct bpf_prog *prog);int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size);
struct bpf_offload_dev;struct bpf_offloaded_map;
struct bpf_map_dev_ops { int (*map_get_next_key)(struct bpf_offloaded_map *map, void *key, void *next_key); int (*map_lookup_elem)(struct bpf_offloaded_map *map, void *key, void *value); int (*map_update_elem)(struct bpf_offloaded_map *map, void *key, void *value, u64 flags); int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);};
struct bpf_offloaded_map { struct bpf_map map; struct net_device *netdev; const struct bpf_map_dev_ops *dev_ops; void *dev_priv; struct list_head offloads;};
static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map){ return container_of(map, struct bpf_offloaded_map, map);}
static inline bool bpf_map_offload_neutral(const struct bpf_map *map){ return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;}
static inline bool bpf_map_support_seq_show(const struct bpf_map *map){ return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) && map->ops->map_seq_show_elem;}
int map_check_no_btf(struct bpf_map *map, const struct btf *btf, const struct btf_type *key_type, const struct btf_type *value_type);
bool bpf_map_meta_equal(const struct bpf_map *meta0, const struct bpf_map *meta1);
static inline bool bpf_map_has_internal_structs(struct bpf_map *map){ return btf_record_has_field(map->record, BPF_TIMER | BPF_WORKQUEUE | BPF_TASK_WORK);}
void bpf_map_free_internal_structs(struct bpf_map *map, void *obj);
int bpf_dynptr_from_file_sleepable(struct file *file, u32 flags, struct bpf_dynptr *ptr__uninit);
#if defined(CONFIG_MMU) && defined(CONFIG_64BIT)void *bpf_arena_alloc_pages_non_sleepable(void *p__map, void *addr__ign, u32 page_cnt, int node_id, u64 flags);void bpf_arena_free_pages_non_sleepable(void *p__map, void *ptr__ign, u32 page_cnt);void *bpf_arena_alloc_pages_sleepable(void *p__map, void *addr__ign, u32 page_cnt, int node_id, u64 flags);#elsestatic inline void *bpf_arena_alloc_pages_non_sleepable(void *p__map, void *addr__ign, u32 page_cnt, int node_id, u64 flags){ return NULL;}
static inline void bpf_arena_free_pages_non_sleepable(void *p__map, void *ptr__ign, u32 page_cnt){}
static inline void *bpf_arena_alloc_pages_sleepable(void *p__map, void *addr__ign, u32 page_cnt, int node_id, u64 flags){ return NULL;}#endif
extern const struct bpf_map_ops bpf_map_offload_ops;
/* bpf_type_flag contains a set of flags that are applicable to the values of * arg_type, ret_type and reg_type. For example, a pointer value may be null, * or a memory is read-only. We classify types into two categories: base types * and extended types. Extended types are base types combined with a type flag. * * Currently there are no more than 32 base types in arg_type, ret_type and * reg_types. */#define BPF_BASE_TYPE_BITS 8
enum bpf_type_flag { /* PTR may be NULL. */ PTR_MAYBE_NULL = BIT(0 + BPF_BASE_TYPE_BITS),
/* MEM is read-only. When applied on bpf_arg, it indicates the arg is * compatible with both mutable and immutable memory. */ MEM_RDONLY = BIT(1 + BPF_BASE_TYPE_BITS),
/* MEM points to BPF ring buffer reservation. */ MEM_RINGBUF = BIT(2 + BPF_BASE_TYPE_BITS),
/* MEM is in user address space. */ MEM_USER = BIT(3 + BPF_BASE_TYPE_BITS),
/* MEM is a percpu memory. MEM_PERCPU tags PTR_TO_BTF_ID. When tagged * with MEM_PERCPU, PTR_TO_BTF_ID _cannot_ be directly accessed. In * order to drop this tag, it must be passed into bpf_per_cpu_ptr() * or bpf_this_cpu_ptr(), which will return the pointer corresponding * to the specified cpu. */ MEM_PERCPU = BIT(4 + BPF_BASE_TYPE_BITS),
/* Indicates that the argument will be released. */ OBJ_RELEASE = BIT(5 + BPF_BASE_TYPE_BITS),
/* PTR is not trusted. This is only used with PTR_TO_BTF_ID, to mark * unreferenced and referenced kptr loaded from map value using a load * instruction, so that they can only be dereferenced but not escape the * BPF program into the kernel (i.e. cannot be passed as arguments to * kfunc or bpf helpers). */ PTR_UNTRUSTED = BIT(6 + BPF_BASE_TYPE_BITS),
/* MEM can be uninitialized. */ MEM_UNINIT = BIT(7 + BPF_BASE_TYPE_BITS),
/* DYNPTR points to memory local to the bpf program. */ DYNPTR_TYPE_LOCAL = BIT(8 + BPF_BASE_TYPE_BITS),
/* DYNPTR points to a kernel-produced ringbuf record. */ DYNPTR_TYPE_RINGBUF = BIT(9 + BPF_BASE_TYPE_BITS),
/* Size is known at compile time. */ MEM_FIXED_SIZE = BIT(10 + BPF_BASE_TYPE_BITS),
/* MEM is of an allocated object of type in program BTF. This is used to * tag PTR_TO_BTF_ID allocated using bpf_obj_new. */ MEM_ALLOC = BIT(11 + BPF_BASE_TYPE_BITS),
/* PTR was passed from the kernel in a trusted context, and may be * passed to kfuncs or BPF helper functions. * Confusingly, this is _not_ the opposite of PTR_UNTRUSTED above. * PTR_UNTRUSTED refers to a kptr that was read directly from a map * without invoking bpf_kptr_xchg(). What we really need to know is * whether a pointer is safe to pass to a kfunc or BPF helper function. * While PTR_UNTRUSTED pointers are unsafe to pass to kfuncs and BPF * helpers, they do not cover all possible instances of unsafe * pointers. For example, a pointer that was obtained from walking a * struct will _not_ get the PTR_UNTRUSTED type modifier, despite the * fact that it may be NULL, invalid, etc. This is due to backwards * compatibility requirements, as this was the behavior that was first * introduced when kptrs were added. The behavior is now considered * deprecated, and PTR_UNTRUSTED will eventually be removed. * * PTR_TRUSTED, on the other hand, is a pointer that the kernel * guarantees to be valid and safe to pass to kfuncs and BPF helpers. * For example, pointers passed to tracepoint arguments are considered * PTR_TRUSTED, as are pointers that are passed to struct_ops * callbacks. As alluded to above, pointers that are obtained from * walking PTR_TRUSTED pointers are _not_ trusted. For example, if a * struct task_struct *task is PTR_TRUSTED, then accessing * task->last_wakee will lose the PTR_TRUSTED modifier when it's stored * in a BPF register. Similarly, pointers passed to certain programs * types such as kretprobes are not guaranteed to be valid, as they may * for example contain an object that was recently freed. */ PTR_TRUSTED = BIT(12 + BPF_BASE_TYPE_BITS),
/* MEM is tagged with rcu and memory access needs rcu_read_lock protection. */ MEM_RCU = BIT(13 + BPF_BASE_TYPE_BITS),
/* Used to tag PTR_TO_BTF_ID | MEM_ALLOC references which are non-owning. * Currently only valid for linked-list and rbtree nodes. If the nodes * have a bpf_refcount_field, they must be tagged MEM_RCU as well. */ NON_OWN_REF = BIT(14 + BPF_BASE_TYPE_BITS),
/* DYNPTR points to sk_buff */ DYNPTR_TYPE_SKB = BIT(15 + BPF_BASE_TYPE_BITS),
/* DYNPTR points to xdp_buff */ DYNPTR_TYPE_XDP = BIT(16 + BPF_BASE_TYPE_BITS),
/* Memory must be aligned on some architectures, used in combination with * MEM_FIXED_SIZE. */ MEM_ALIGNED = BIT(17 + BPF_BASE_TYPE_BITS),
/* MEM is being written to, often combined with MEM_UNINIT. Non-presence * of MEM_WRITE means that MEM is only being read. MEM_WRITE without the * MEM_UNINIT means that memory needs to be initialized since it is also * read. */ MEM_WRITE = BIT(18 + BPF_BASE_TYPE_BITS),
/* DYNPTR points to skb_metadata_end()-skb_metadata_len() */ DYNPTR_TYPE_SKB_META = BIT(19 + BPF_BASE_TYPE_BITS),
/* DYNPTR points to file */ DYNPTR_TYPE_FILE = BIT(20 + BPF_BASE_TYPE_BITS),
__BPF_TYPE_FLAG_MAX, __BPF_TYPE_LAST_FLAG = __BPF_TYPE_FLAG_MAX - 1,};
#define DYNPTR_TYPE_FLAG_MASK (DYNPTR_TYPE_LOCAL | DYNPTR_TYPE_RINGBUF | DYNPTR_TYPE_SKB \ | DYNPTR_TYPE_XDP | DYNPTR_TYPE_SKB_META | DYNPTR_TYPE_FILE)
/* Max number of base types. */#define BPF_BASE_TYPE_LIMIT (1UL << BPF_BASE_TYPE_BITS)
/* Max number of all types. */#define BPF_TYPE_LIMIT (__BPF_TYPE_LAST_FLAG | (__BPF_TYPE_LAST_FLAG - 1))
/* function argument constraints */enum bpf_arg_type { ARG_DONTCARE = 0, /* unused argument in helper function */
/* the following constraints used to prototype * bpf_map_lookup/update/delete_elem() functions */ ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */ ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */ ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
/* Used to prototype bpf_memcmp() and other functions that access data * on eBPF program stack */ ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */ ARG_PTR_TO_ARENA,
ARG_CONST_SIZE, /* number of bytes accessed from memory */ ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
ARG_PTR_TO_CTX, /* pointer to context */ ARG_ANYTHING, /* any (initialized) argument is ok */ ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */ ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */ ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */ ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */ ARG_PTR_TO_RINGBUF_MEM, /* pointer to dynamically reserved ringbuf memory */ ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */ ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */ ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */ ARG_PTR_TO_FUNC, /* pointer to a bpf program function */ ARG_PTR_TO_STACK, /* pointer to stack */ ARG_PTR_TO_CONST_STR, /* pointer to a null terminated read-only string */ ARG_PTR_TO_TIMER, /* pointer to bpf_timer */ ARG_KPTR_XCHG_DEST, /* pointer to destination that kptrs are bpf_kptr_xchg'd into */ ARG_PTR_TO_DYNPTR, /* pointer to bpf_dynptr. See bpf_type_flag for dynptr type */ __BPF_ARG_TYPE_MAX,
/* Extended arg_types. */ ARG_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MAP_VALUE, ARG_PTR_TO_MEM_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MEM, ARG_PTR_TO_CTX_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_CTX, ARG_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_SOCKET, ARG_PTR_TO_STACK_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_STACK, ARG_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_BTF_ID, /* Pointer to memory does not need to be initialized, since helper function * fills all bytes or clears them in error case. */ ARG_PTR_TO_UNINIT_MEM = MEM_UNINIT | MEM_WRITE | ARG_PTR_TO_MEM, /* Pointer to valid memory of size known at compile time. */ ARG_PTR_TO_FIXED_SIZE_MEM = MEM_FIXED_SIZE | ARG_PTR_TO_MEM,
/* This must be the last entry. Its purpose is to ensure the enum is * wide enough to hold the higher bits reserved for bpf_type_flag. */ __BPF_ARG_TYPE_LIMIT = BPF_TYPE_LIMIT,};static_assert(__BPF_ARG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
/* type of values returned from helper functions */enum bpf_return_type { RET_INTEGER, /* function returns integer */ RET_VOID, /* function doesn't return anything */ RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */ RET_PTR_TO_SOCKET, /* returns a pointer to a socket */ RET_PTR_TO_TCP_SOCK, /* returns a pointer to a tcp_sock */ RET_PTR_TO_SOCK_COMMON, /* returns a pointer to a sock_common */ RET_PTR_TO_MEM, /* returns a pointer to memory */ RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */ RET_PTR_TO_BTF_ID, /* returns a pointer to a btf_id */ __BPF_RET_TYPE_MAX,
/* Extended ret_types. */ RET_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_MAP_VALUE, RET_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCKET, RET_PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_TCP_SOCK, RET_PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCK_COMMON, RET_PTR_TO_RINGBUF_MEM_OR_NULL = PTR_MAYBE_NULL | MEM_RINGBUF | RET_PTR_TO_MEM, RET_PTR_TO_DYNPTR_MEM_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_MEM, RET_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_BTF_ID, RET_PTR_TO_BTF_ID_TRUSTED = PTR_TRUSTED | RET_PTR_TO_BTF_ID,
/* This must be the last entry. Its purpose is to ensure the enum is * wide enough to hold the higher bits reserved for bpf_type_flag. */ __BPF_RET_TYPE_LIMIT = BPF_TYPE_LIMIT,};static_assert(__BPF_RET_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
/* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL * instructions after verifying */struct bpf_func_proto { u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); bool gpl_only; bool pkt_access; bool might_sleep; /* set to true if helper follows contract for llvm * attribute bpf_fastcall: * - void functions do not scratch r0 * - functions taking N arguments scratch only registers r1-rN */ bool allow_fastcall; enum bpf_return_type ret_type; union { struct { enum bpf_arg_type arg1_type; enum bpf_arg_type arg2_type; enum bpf_arg_type arg3_type; enum bpf_arg_type arg4_type; enum bpf_arg_type arg5_type; }; enum bpf_arg_type arg_type[5]; }; union { struct { u32 *arg1_btf_id; u32 *arg2_btf_id; u32 *arg3_btf_id; u32 *arg4_btf_id; u32 *arg5_btf_id; }; u32 *arg_btf_id[5]; struct { size_t arg1_size; size_t arg2_size; size_t arg3_size; size_t arg4_size; size_t arg5_size; }; size_t arg_size[5]; }; int *ret_btf_id; /* return value btf_id */ bool (*allowed)(const struct bpf_prog *prog);};
/* bpf_context is intentionally undefined structure. Pointer to bpf_context is * the first argument to eBPF programs. * For socket filters: 'struct bpf_context *' == 'struct sk_buff *' */struct bpf_context;
enum bpf_access_type { BPF_READ = 1, BPF_WRITE = 2};
/* types of values stored in eBPF registers *//* Pointer types represent: * pointer * pointer + imm * pointer + (u16) var * pointer + (u16) var + imm * if (range > 0) then [ptr, ptr + range - off) is safe to access * if (id > 0) means that some 'var' was added * if (off > 0) means that 'imm' was added */enum bpf_reg_type { NOT_INIT = 0, /* nothing was written into register */ SCALAR_VALUE, /* reg doesn't contain a valid pointer */ PTR_TO_CTX, /* reg points to bpf_context */ CONST_PTR_TO_MAP, /* reg points to struct bpf_map */ PTR_TO_MAP_VALUE, /* reg points to map element value */ PTR_TO_MAP_KEY, /* reg points to a map element key */ PTR_TO_STACK, /* reg == frame_pointer + offset */ PTR_TO_PACKET_META, /* skb->data - meta_len */ PTR_TO_PACKET, /* reg points to skb->data */ PTR_TO_PACKET_END, /* skb->data + headlen */ PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */ PTR_TO_SOCKET, /* reg points to struct bpf_sock */ PTR_TO_SOCK_COMMON, /* reg points to sock_common */ PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */ PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */ PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */ /* PTR_TO_BTF_ID points to a kernel struct that does not need * to be null checked by the BPF program. This does not imply the * pointer is _not_ null and in practice this can easily be a null * pointer when reading pointer chains. The assumption is program * context will handle null pointer dereference typically via fault * handling. The verifier must keep this in mind and can make no * assumptions about null or non-null when doing branch analysis. * Further, when passed into helpers the helpers can not, without * additional context, assume the value is non-null. */ PTR_TO_BTF_ID, PTR_TO_MEM, /* reg points to valid memory region */ PTR_TO_ARENA, PTR_TO_BUF, /* reg points to a read/write buffer */ PTR_TO_FUNC, /* reg points to a bpf program function */ PTR_TO_INSN, /* reg points to a bpf program instruction */ CONST_PTR_TO_DYNPTR, /* reg points to a const struct bpf_dynptr */ __BPF_REG_TYPE_MAX,
/* Extended reg_types. */ PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | PTR_TO_MAP_VALUE, PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCKET, PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCK_COMMON, PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | PTR_TO_TCP_SOCK, /* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not * been checked for null. Used primarily to inform the verifier * an explicit null check is required for this struct. */ PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | PTR_TO_BTF_ID,
/* This must be the last entry. Its purpose is to ensure the enum is * wide enough to hold the higher bits reserved for bpf_type_flag. */ __BPF_REG_TYPE_LIMIT = BPF_TYPE_LIMIT,};static_assert(__BPF_REG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
/* The information passed from prog-specific *_is_valid_access * back to the verifier. */struct bpf_insn_access_aux { enum bpf_reg_type reg_type; bool is_ldsx; union { int ctx_field_size; struct { struct btf *btf; u32 btf_id; u32 ref_id; }; }; struct bpf_verifier_log *log; /* for verbose logs */ bool is_retval; /* is accessing function return value ? */};
static inline voidbpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size){ aux->ctx_field_size = size;}
static bool bpf_is_ldimm64(const struct bpf_insn *insn){ return insn->code == (BPF_LD | BPF_IMM | BPF_DW);}
static inline bool bpf_pseudo_func(const struct bpf_insn *insn){ return bpf_is_ldimm64(insn) && insn->src_reg == BPF_PSEUDO_FUNC;}
/* Given a BPF_ATOMIC instruction @atomic_insn, return true if it is an * atomic load or store, and false if it is a read-modify-write instruction. */static inline boolbpf_atomic_is_load_store(const struct bpf_insn *atomic_insn){ switch (atomic_insn->imm) { case BPF_LOAD_ACQ: case BPF_STORE_REL: return true; default: return false; }}
struct bpf_prog_ops { int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr);};
struct bpf_reg_state;struct bpf_verifier_ops { /* return eBPF function prototype for verification */ const struct bpf_func_proto * (*get_func_proto)(enum bpf_func_id func_id, const struct bpf_prog *prog);
/* return true if 'size' wide access at offset 'off' within bpf_context * with 'type' (read or write) is allowed */ bool (*is_valid_access)(int off, int size, enum bpf_access_type type, const struct bpf_prog *prog, struct bpf_insn_access_aux *info); int (*gen_prologue)(struct bpf_insn *insn, bool direct_write, const struct bpf_prog *prog); int (*gen_epilogue)(struct bpf_insn *insn, const struct bpf_prog *prog, s16 ctx_stack_off); int (*gen_ld_abs)(const struct bpf_insn *orig, struct bpf_insn *insn_buf); u32 (*convert_ctx_access)(enum bpf_access_type type, const struct bpf_insn *src, struct bpf_insn *dst, struct bpf_prog *prog, u32 *target_size); int (*btf_struct_access)(struct bpf_verifier_log *log, const struct bpf_reg_state *reg, int off, int size);};
struct bpf_prog_offload_ops { /* verifier basic callbacks */ int (*insn_hook)(struct bpf_verifier_env *env, int insn_idx, int prev_insn_idx); int (*finalize)(struct bpf_verifier_env *env); /* verifier optimization callbacks (called after .finalize) */ int (*replace_insn)(struct bpf_verifier_env *env, u32 off, struct bpf_insn *insn); int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt); /* program management callbacks */ int (*prepare)(struct bpf_prog *prog); int (*translate)(struct bpf_prog *prog); void (*destroy)(struct bpf_prog *prog);};
struct bpf_prog_offload { struct bpf_prog *prog; struct net_device *netdev; struct bpf_offload_dev *offdev; void *dev_priv; struct list_head offloads; bool dev_state; bool opt_failed; void *jited_image; u32 jited_len;};
/* The longest tracepoint has 12 args. * See include/trace/bpf_probe.h * * Also reuse this macro for maximum number of arguments a BPF function * or a kfunc can have. Args 1-5 are passed in registers, args 6-12 via * stack arg slots. The JIT may map some stack arg slots to registers based * on the native calling convention (e.g., arg 6 to R9 on x86-64). */#define MAX_BPF_FUNC_ARGS 12
/* The maximum number of arguments passed through registers * a single function may have. */#define MAX_BPF_FUNC_REG_ARGS 5
/* The argument is a structure or a union. */#define BTF_FMODEL_STRUCT_ARG BIT(0)
/* The argument is signed. */#define BTF_FMODEL_SIGNED_ARG BIT(1)
struct btf_func_model { u8 ret_size; u8 ret_flags; u8 nr_args; u8 arg_size[MAX_BPF_FUNC_ARGS]; u8 arg_flags[MAX_BPF_FUNC_ARGS];};
/* Restore arguments before returning from trampoline to let original function * continue executing. This flag is used for fentry progs when there are no * fexit progs. */#define BPF_TRAMP_F_RESTORE_REGS BIT(0)/* Call original function after fentry progs, but before fexit progs. * Makes sense for fentry/fexit, normal calls and indirect calls. */#define BPF_TRAMP_F_CALL_ORIG BIT(1)/* Skip current frame and return to parent. Makes sense for fentry/fexit * programs only. Should not be used with normal calls and indirect calls. */#define BPF_TRAMP_F_SKIP_FRAME BIT(2)/* Store IP address of the caller on the trampoline stack, * so it's available for trampoline's programs. */#define BPF_TRAMP_F_IP_ARG BIT(3)/* Return the return value of fentry prog. Only used by bpf_struct_ops. */#define BPF_TRAMP_F_RET_FENTRY_RET BIT(4)
/* Get original function from stack instead of from provided direct address. * Makes sense for trampolines with fexit or fmod_ret programs. */#define BPF_TRAMP_F_ORIG_STACK BIT(5)
/* This trampoline is on a function with another ftrace_ops with IPMODIFY, * e.g., a live patch. This flag is set and cleared by ftrace call backs, */#define BPF_TRAMP_F_SHARE_IPMODIFY BIT(6)
/* Indicate that current trampoline is in a tail call context. Then, it has to * cache and restore tail_call_cnt to avoid infinite tail call loop. */#define BPF_TRAMP_F_TAIL_CALL_CTX BIT(7)
/* * Indicate the trampoline should be suitable to receive indirect calls; * without this indirectly calling the generated code can result in #UD/#CP, * depending on the CFI options. * * Used by bpf_struct_ops. * * Incompatible with FENTRY usage, overloads @func_addr argument. */#define BPF_TRAMP_F_INDIRECT BIT(8)
/* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50 * bytes on x86. */enum {#if defined(__s390x__) BPF_MAX_TRAMP_LINKS = 27,#else BPF_MAX_TRAMP_LINKS = 38,#endif};
#define BPF_TRAMP_COOKIE_INDEX_SHIFT 8#define BPF_TRAMP_IS_RETURN_SHIFT 63
struct bpf_tramp_nodes { struct bpf_tramp_node *nodes[BPF_MAX_TRAMP_LINKS]; int nr_nodes;};
struct bpf_tramp_run_ctx;
/* Different use cases for BPF trampoline: * 1. replace nop at the function entry (kprobe equivalent) * flags = BPF_TRAMP_F_RESTORE_REGS * fentry = a set of programs to run before returning from trampoline * * 2. replace nop at the function entry (kprobe + kretprobe equivalent) * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME * orig_call = fentry_ip + MCOUNT_INSN_SIZE * fentry = a set of program to run before calling original function * fexit = a set of program to run after original function * * 3. replace direct call instruction anywhere in the function body * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid) * With flags = 0 * fentry = a set of programs to run before returning from trampoline * With flags = BPF_TRAMP_F_CALL_ORIG * orig_call = original callback addr or direct function addr * fentry = a set of program to run before calling original function * fexit = a set of program to run after original function */struct bpf_tramp_image;int arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, void *image, void *image_end, const struct btf_func_model *m, u32 flags, struct bpf_tramp_nodes *tnodes, void *func_addr);void *arch_alloc_bpf_trampoline(unsigned int size);void arch_free_bpf_trampoline(void *image, unsigned int size);int __must_check arch_protect_bpf_trampoline(void *image, unsigned int size);int arch_bpf_trampoline_size(const struct btf_func_model *m, u32 flags, struct bpf_tramp_nodes *tnodes, void *func_addr);
u64 notrace __bpf_prog_enter_sleepable_recur(struct bpf_prog *prog, struct bpf_tramp_run_ctx *run_ctx);void notrace __bpf_prog_exit_sleepable_recur(struct bpf_prog *prog, u64 start, struct bpf_tramp_run_ctx *run_ctx);void notrace __bpf_tramp_enter(struct bpf_tramp_image *tr);void notrace __bpf_tramp_exit(struct bpf_tramp_image *tr);typedef u64 (*bpf_trampoline_enter_t)(struct bpf_prog *prog, struct bpf_tramp_run_ctx *run_ctx);typedef void (*bpf_trampoline_exit_t)(struct bpf_prog *prog, u64 start, struct bpf_tramp_run_ctx *run_ctx);bpf_trampoline_enter_t bpf_trampoline_enter(const struct bpf_prog *prog);bpf_trampoline_exit_t bpf_trampoline_exit(const struct bpf_prog *prog);
#ifdef CONFIG_DYNAMIC_FTRACE_WITH_JMPstatic inline bool bpf_trampoline_use_jmp(u64 flags){ return flags & BPF_TRAMP_F_CALL_ORIG && !(flags & BPF_TRAMP_F_SKIP_FRAME);}#elsestatic inline bool bpf_trampoline_use_jmp(u64 flags){ return false;}#endif
struct bpf_ksym { unsigned long start; unsigned long end; char name[KSYM_NAME_LEN]; struct list_head lnode; struct latch_tree_node tnode; bool prog; u32 fp_start; u32 fp_end;};
enum bpf_tramp_prog_type { BPF_TRAMP_FENTRY, BPF_TRAMP_FEXIT, BPF_TRAMP_MODIFY_RETURN, BPF_TRAMP_MAX, BPF_TRAMP_REPLACE, /* more than MAX */ BPF_TRAMP_FSESSION,};
struct bpf_tramp_image { void *image; int size; struct bpf_ksym ksym; struct percpu_ref pcref; void *ip_after_call; void *ip_epilogue; union { struct rcu_head rcu; struct work_struct work; };};
struct bpf_trampoline { /* hlist for trampoline_key_table */ struct hlist_node hlist_key; /* hlist for trampoline_ip_table */ struct hlist_node hlist_ip; struct ftrace_ops *fops; refcount_t refcnt; u32 flags; u64 key; unsigned long ip; struct { struct btf_func_model model; void *addr; bool ftrace_managed; } func; /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF * program by replacing one of its functions. func.addr is the address * of the function it replaced. */ struct bpf_prog *extension_prog; /* list of BPF programs using this trampoline */ struct hlist_head progs_hlist[BPF_TRAMP_MAX]; /* Number of attached programs. A counter per kind. */ int progs_cnt[BPF_TRAMP_MAX]; /* Executable image of trampoline */ struct bpf_tramp_image *cur_image; /* Used as temporary old image storage for multi_attach */ struct { struct bpf_tramp_image *old_image; u32 old_flags; } multi_attach;};
struct bpf_attach_target_info { struct btf_func_model fmodel; long tgt_addr; struct module *tgt_mod; const char *tgt_name; const struct btf_type *tgt_type;};
#define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
struct bpf_dispatcher_prog { struct bpf_prog *prog; refcount_t users;};
struct bpf_dispatcher { /* dispatcher mutex */ struct mutex mutex; void *func; struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX]; int num_progs; void *image; void *rw_image; u32 image_off; struct bpf_ksym ksym;#ifdef CONFIG_HAVE_STATIC_CALL struct static_call_key *sc_key; void *sc_tramp;#endif};
#ifndef __bpfcall#define __bpfcall __nocfi#endif
static __always_inline __bpfcall unsigned int bpf_dispatcher_nop_func( const void *ctx, const struct bpf_insn *insnsi, bpf_func_t bpf_func){ return bpf_func(ctx, insnsi);}
/* the implementation of the opaque uapi struct bpf_dynptr */struct bpf_dynptr_kern { void *data; /* Size represents the number of usable bytes of dynptr data. * If for example the offset is at 4 for a local dynptr whose data is * of type u64, the number of usable bytes is 4. * * The upper 8 bits are reserved. It is as follows: * Bits 0 - 23 = size * Bits 24 - 30 = dynptr type * Bit 31 = whether dynptr is read-only */ u32 size; u32 offset;} __aligned(8);
enum bpf_dynptr_type { BPF_DYNPTR_TYPE_INVALID, /* Points to memory that is local to the bpf program */ BPF_DYNPTR_TYPE_LOCAL, /* Underlying data is a ringbuf record */ BPF_DYNPTR_TYPE_RINGBUF, /* Underlying data is a sk_buff */ BPF_DYNPTR_TYPE_SKB, /* Underlying data is a xdp_buff */ BPF_DYNPTR_TYPE_XDP, /* Points to skb_metadata_end()-skb_metadata_len() */ BPF_DYNPTR_TYPE_SKB_META, /* Underlying data is a file */ BPF_DYNPTR_TYPE_FILE,};
int bpf_dynptr_check_size(u64 size);u64 __bpf_dynptr_size(const struct bpf_dynptr_kern *ptr);const void *__bpf_dynptr_data(const struct bpf_dynptr_kern *ptr, u64 len);void *__bpf_dynptr_data_rw(const struct bpf_dynptr_kern *ptr, u64 len);bool __bpf_dynptr_is_rdonly(const struct bpf_dynptr_kern *ptr);int __bpf_dynptr_write(const struct bpf_dynptr_kern *dst, u64 offset, void *src, u64 len, u64 flags);void *bpf_dynptr_slice_rdwr(const struct bpf_dynptr *p, u64 offset, void *buffer__nullable, u64 buffer__szk);
static inline int bpf_dynptr_check_off_len(const struct bpf_dynptr_kern *ptr, u64 offset, u64 len){ u64 size = __bpf_dynptr_size(ptr);
if (len > size || offset > size - len) return -E2BIG;
return 0;}
struct bpf_tracing_multi_link;
#ifdef CONFIG_BPF_JITint bpf_trampoline_link_prog(struct bpf_tramp_node *node, struct bpf_trampoline *tr, struct bpf_prog *tgt_prog);int bpf_trampoline_unlink_prog(struct bpf_tramp_node *node, struct bpf_trampoline *tr, struct bpf_prog *tgt_prog);struct bpf_trampoline *bpf_trampoline_get(u64 key, struct bpf_attach_target_info *tgt_info);void bpf_trampoline_put(struct bpf_trampoline *tr);int arch_prepare_bpf_dispatcher(void *image, void *buf, s64 *funcs, int num_funcs);
int bpf_trampoline_multi_attach(struct bpf_prog *prog, u32 *ids, struct bpf_tracing_multi_link *link);int bpf_trampoline_multi_detach(struct bpf_prog *prog, struct bpf_tracing_multi_link *link);
/* * When the architecture supports STATIC_CALL replace the bpf_dispatcher_fn * indirection with a direct call to the bpf program. If the architecture does * not have STATIC_CALL, avoid a double-indirection. */#ifdef CONFIG_HAVE_STATIC_CALL
#define __BPF_DISPATCHER_SC_INIT(_name) \ .sc_key = &STATIC_CALL_KEY(_name), \ .sc_tramp = STATIC_CALL_TRAMP_ADDR(_name),
#define __BPF_DISPATCHER_SC(name) \ DEFINE_STATIC_CALL(bpf_dispatcher_##name##_call, bpf_dispatcher_nop_func)
#define __BPF_DISPATCHER_CALL(name) \ static_call(bpf_dispatcher_##name##_call)(ctx, insnsi, bpf_func)
#define __BPF_DISPATCHER_UPDATE(_d, _new) \ __static_call_update((_d)->sc_key, (_d)->sc_tramp, (_new))
#else#define __BPF_DISPATCHER_SC_INIT(name)#define __BPF_DISPATCHER_SC(name)#define __BPF_DISPATCHER_CALL(name) bpf_func(ctx, insnsi)#define __BPF_DISPATCHER_UPDATE(_d, _new)#endif
#define BPF_DISPATCHER_INIT(_name) { \ .mutex = __MUTEX_INITIALIZER(_name.mutex), \ .func = &_name##_func, \ .progs = {}, \ .num_progs = 0, \ .image = NULL, \ .image_off = 0, \ .ksym = { \ .name = #_name, \ .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \ }, \ __BPF_DISPATCHER_SC_INIT(_name##_call) \}
#define DEFINE_BPF_DISPATCHER(name) \ __BPF_DISPATCHER_SC(name); \ noinline __bpfcall unsigned int bpf_dispatcher_##name##_func( \ const void *ctx, \ const struct bpf_insn *insnsi, \ bpf_func_t bpf_func) \ { \ return __BPF_DISPATCHER_CALL(name); \ } \ EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \ struct bpf_dispatcher bpf_dispatcher_##name = \ BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
#define DECLARE_BPF_DISPATCHER(name) \ unsigned int bpf_dispatcher_##name##_func( \ const void *ctx, \ const struct bpf_insn *insnsi, \ bpf_func_t bpf_func); \ extern struct bpf_dispatcher bpf_dispatcher_##name;
#define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func#define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from, struct bpf_prog *to);/* Called only from JIT-enabled code, so there's no need for stubs. */void bpf_image_ksym_init(void *data, unsigned int size, struct bpf_ksym *ksym);void bpf_image_ksym_add(struct bpf_ksym *ksym);void bpf_image_ksym_del(struct bpf_ksym *ksym);void bpf_ksym_add(struct bpf_ksym *ksym);void bpf_ksym_del(struct bpf_ksym *ksym);bool bpf_has_frame_pointer(unsigned long ip);int bpf_jit_charge_modmem(u32 size);void bpf_jit_uncharge_modmem(u32 size);bool bpf_prog_has_trampoline(const struct bpf_prog *prog);bool bpf_insn_is_indirect_target(const struct bpf_verifier_env *env, const struct bpf_prog *prog, int insn_idx);u16 bpf_out_stack_arg_cnt(const struct bpf_verifier_env *env, const struct bpf_prog *prog);#elsestatic inline int bpf_trampoline_link_prog(struct bpf_tramp_node *node, struct bpf_trampoline *tr, struct bpf_prog *tgt_prog){ return -ENOTSUPP;}static inline int bpf_trampoline_unlink_prog(struct bpf_tramp_node *node, struct bpf_trampoline *tr, struct bpf_prog *tgt_prog){ return -ENOTSUPP;}static inline struct bpf_trampoline *bpf_trampoline_get(u64 key, struct bpf_attach_target_info *tgt_info){ return NULL;}static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}#define DEFINE_BPF_DISPATCHER(name)#define DECLARE_BPF_DISPATCHER(name)#define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func#define BPF_DISPATCHER_PTR(name) NULLstatic inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from, struct bpf_prog *to) {}static inline bool is_bpf_image_address(unsigned long address){ return false;}static inline bool bpf_prog_has_trampoline(const struct bpf_prog *prog){ return false;}static inline int bpf_trampoline_multi_attach(struct bpf_prog *prog, u32 *ids, struct bpf_tracing_multi_link *link){ return -ENOTSUPP;}static inline int bpf_trampoline_multi_detach(struct bpf_prog *prog, struct bpf_tracing_multi_link *link){ return -ENOTSUPP;}#endif
struct bpf_func_info_aux { u16 linkage; bool unreliable; bool called : 1; bool verified : 1;};
enum bpf_jit_poke_reason { BPF_POKE_REASON_TAIL_CALL,};
/* Descriptor of pokes pointing /into/ the JITed image. */struct bpf_jit_poke_descriptor { void *tailcall_target; void *tailcall_bypass; void *bypass_addr; void *aux; union { struct { struct bpf_map *map; u32 key; } tail_call; }; bool tailcall_target_stable; u8 adj_off; u16 reason; u32 insn_idx;};
/* reg_type info for ctx arguments */struct bpf_ctx_arg_aux { u32 offset; enum bpf_reg_type reg_type; struct btf *btf; u32 btf_id; u32 ref_id; bool refcounted;};
struct btf_mod_pair { struct btf *btf; struct module *module;};
struct bpf_kfunc_desc_tab;
enum bpf_stream_id { BPF_STDOUT = 1, BPF_STDERR = 2,};
struct bpf_stream_elem { struct llist_node node; int total_len; int consumed_len; char str[];};
enum { /* 100k bytes */ BPF_STREAM_MAX_CAPACITY = 100000ULL,};
struct bpf_stream { atomic_t capacity; struct llist_head log; /* list of in-flight stream elements in LIFO order */
struct mutex lock; /* lock protecting backlog_{head,tail} */ struct llist_node *backlog_head; /* list of in-flight stream elements in FIFO order */ struct llist_node *backlog_tail; /* tail of the list above */};
struct bpf_stream_stage { struct llist_head log; int len;};
enum bpf_sig_verdict { BPF_SIG_UNSIGNED = 0, BPF_SIG_VERIFIED,};
enum bpf_sig_keyring { BPF_SIG_KEYRING_NONE = 0, BPF_SIG_KEYRING_BUILTIN, BPF_SIG_KEYRING_SECONDARY, BPF_SIG_KEYRING_PLATFORM, BPF_SIG_KEYRING_USER,};
struct bpf_prog_aux { atomic64_t refcnt; u32 used_map_cnt; u32 used_btf_cnt; u32 max_ctx_offset; u32 max_pkt_offset; u32 max_tp_access; u32 stack_depth; u32 id; u32 func_cnt; /* used by non-func prog as the number of func progs */ u32 real_func_cnt; /* includes hidden progs, only used for JIT and freeing progs */ u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */ u32 attach_btf_id; /* in-kernel BTF type id to attach to */ u32 attach_st_ops_member_off; u32 ctx_arg_info_size; u32 max_rdonly_access; u32 max_rdwr_access; u32 subprog_start; struct btf *attach_btf; struct bpf_ctx_arg_aux *ctx_arg_info; void __percpu *priv_stack_ptr; struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */ struct bpf_prog *dst_prog; struct bpf_trampoline *dst_trampoline; enum bpf_prog_type saved_dst_prog_type; enum bpf_attach_type saved_dst_attach_type; bool verifier_zext; /* Zero extensions has been inserted by verifier. */ bool dev_bound; /* Program is bound to the netdev. */ bool offload_requested; /* Program is bound and offloaded to the netdev. */ bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */ bool attach_tracing_prog; /* true if tracing another tracing program */ bool func_proto_unreliable; bool tail_call_reachable; bool xdp_has_frags; bool exception_cb; bool exception_boundary; bool is_extended; /* true if extended by freplace program */ bool jits_use_priv_stack; bool priv_stack_requested; bool changes_pkt_data; bool might_sleep; bool kprobe_write_ctx; struct { s32 keyring_serial; u8 keyring_type; u8 verdict; } sig; u64 prog_array_member_cnt; /* counts how many times as member of prog_array */ struct mutex ext_mutex; /* mutex for is_extended and prog_array_member_cnt */ struct bpf_arena *arena; void (*recursion_detected)(struct bpf_prog *prog); /* callback if recursion is detected */ /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */ const struct btf_type *attach_func_proto; /* function name for valid attach_btf_id */ const char *attach_func_name; struct bpf_prog **func; struct bpf_prog_aux *main_prog_aux; void *jit_data; /* JIT specific data. arch dependent */ struct bpf_jit_poke_descriptor *poke_tab; struct bpf_kfunc_desc_tab *kfunc_tab; struct bpf_kfunc_btf_tab *kfunc_btf_tab; u32 size_poke_tab;#ifdef CONFIG_FINEIBT struct bpf_ksym ksym_prefix;#endif struct bpf_ksym ksym; const struct bpf_prog_ops *ops; const struct bpf_struct_ops *st_ops; struct bpf_map **used_maps; struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */ struct btf_mod_pair *used_btfs; struct bpf_prog *prog; struct user_struct *user; u64 load_time; /* ns since boottime */ u32 verified_insns; int cgroup_atype; /* enum cgroup_bpf_attach_type */ struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; char name[BPF_OBJ_NAME_LEN]; u64 (*bpf_exception_cb)(u64 cookie, u64 sp, u64 bp, u64, u64); u16 stack_arg_sp_adjust;#ifdef CONFIG_SECURITY void *security;#endif struct bpf_token *token; struct bpf_prog_offload *offload; struct btf *btf; struct bpf_func_info *func_info; struct bpf_func_info_aux *func_info_aux; /* bpf_line_info loaded from userspace. linfo->insn_off * has the xlated insn offset. * Both the main and sub prog share the same linfo. * The subprog can access its first linfo by * using the linfo_idx. */ struct bpf_line_info *linfo; /* jited_linfo is the jited addr of the linfo. It has a * one to one mapping to linfo: * jited_linfo[i] is the jited addr for the linfo[i]->insn_off. * Both the main and sub prog share the same jited_linfo. * The subprog can access its first jited_linfo by * using the linfo_idx. */ void **jited_linfo; u32 func_info_cnt; u32 nr_linfo; /* subprog can use linfo_idx to access its first linfo and * jited_linfo. * main prog always has linfo_idx == 0 */ u32 linfo_idx; struct module *mod; u32 num_exentries; struct exception_table_entry *extable; union { struct work_struct work; struct rcu_head rcu; }; struct bpf_stream stream[2]; struct mutex st_ops_assoc_mutex; struct bpf_map __rcu *st_ops_assoc;};
#define BPF_NR_CONTEXTS 4 /* normal, softirq, hardirq, NMI */
struct bpf_prog { u16 pages; /* Number of allocated pages */ u16 jited:1, /* Is our filter JIT'ed? */ jit_requested:1,/* archs need to JIT the prog */ gpl_compatible:1, /* Is filter GPL compatible? */ cb_access:1, /* Is control block accessed? */ dst_needed:1, /* Do we need dst entry? */ blinding_requested:1, /* needs constant blinding */ blinded:1, /* Was blinded */ is_func:1, /* program is a bpf function */ kprobe_override:1, /* Do we override a kprobe? */ has_callchain_buf:1, /* callchain buffer allocated? */ enforce_expected_attach_type:1, /* Enforce expected_attach_type checking at attach time */ call_get_stack:1, /* Do we call bpf_get_stack() or bpf_get_stackid() */ call_get_func_ip:1, /* Do we call get_func_ip() */ call_session_cookie:1, /* Do we call bpf_session_cookie() */ tstamp_type_access:1, /* Accessed __sk_buff->tstamp_type */ sleepable:1; /* BPF program is sleepable */ enum bpf_prog_type type; /* Type of BPF program */ enum bpf_attach_type expected_attach_type; /* For some prog types */ u32 len; /* Number of filter blocks */ u32 jited_len; /* Size of jited insns in bytes */ union { u8 digest[SHA256_DIGEST_SIZE]; u8 tag[BPF_TAG_SIZE]; }; struct bpf_prog_stats __percpu *stats; u8 __percpu *active; /* u8[BPF_NR_CONTEXTS] for recursion protection */ unsigned int (*bpf_func)(const void *ctx, const struct bpf_insn *insn); struct bpf_prog_aux *aux; /* Auxiliary fields */ struct sock_fprog_kern *orig_prog; /* Original BPF program */ /* Instructions for interpreter */ union { DECLARE_FLEX_ARRAY(struct sock_filter, insns); DECLARE_FLEX_ARRAY(struct bpf_insn, insnsi); };};
struct bpf_array_aux { /* Programs with direct jumps into programs part of this array. */ struct list_head poke_progs; struct bpf_map *map; struct mutex poke_mutex; struct work_struct work;};
struct bpf_link { atomic64_t refcnt; u32 id; enum bpf_link_type type; const struct bpf_link_ops *ops; struct bpf_prog *prog;
u32 flags; enum bpf_attach_type attach_type;
/* rcu is used before freeing, work can be used to schedule that * RCU-based freeing before that, so they never overlap */ union { struct rcu_head rcu; struct work_struct work; }; /* whether BPF link itself has "sleepable" semantics, which can differ * from underlying BPF program having a "sleepable" semantics, as BPF * link's semantics is determined by target attach hook */ bool sleepable;};
struct bpf_link_ops { void (*release)(struct bpf_link *link); /* deallocate link resources callback, called without RCU grace period * waiting */ void (*dealloc)(struct bpf_link *link); /* deallocate link resources callback, called after RCU grace period; * if either the underlying BPF program is sleepable or BPF link's * target hook is sleepable, we'll go through tasks trace RCU GP and * then "classic" RCU GP; this need for chaining tasks trace and * classic RCU GPs is designated by setting bpf_link->sleepable flag * * For non-sleepable tracepoint links we go through SRCU gp instead, * since RCU is not used in that case. Sleepable tracepoints still * follow the scheme above. */ void (*dealloc_deferred)(struct bpf_link *link); int (*detach)(struct bpf_link *link); int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog, struct bpf_prog *old_prog); void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq); int (*fill_link_info)(const struct bpf_link *link, struct bpf_link_info *info); int (*update_map)(struct bpf_link *link, struct bpf_map *new_map, struct bpf_map *old_map); __poll_t (*poll)(struct file *file, struct poll_table_struct *pts);};
struct bpf_tramp_node { struct bpf_link *link; struct hlist_node tramp_hlist; u64 cookie;};
struct bpf_tramp_link { struct bpf_link link; struct bpf_tramp_node node;};
struct bpf_shim_tramp_link { struct bpf_tramp_link link; struct bpf_trampoline *trampoline;};
struct bpf_tracing_link { struct bpf_tramp_link link; struct bpf_tramp_node fexit; struct bpf_trampoline *trampoline; struct bpf_prog *tgt_prog;};
struct bpf_tracing_multi_node { struct bpf_tramp_node node; struct bpf_trampoline *trampoline; struct ftrace_func_entry entry;};
struct bpf_tracing_multi_data { struct ftrace_hash *unreg; struct ftrace_hash *modify; struct ftrace_hash *reg; struct ftrace_func_entry *entry;};
struct bpf_tracing_multi_link { struct bpf_link link; struct bpf_tracing_multi_data data; u64 *cookies; struct bpf_tramp_node *fexits; int nodes_cnt; struct bpf_tracing_multi_node nodes[] __counted_by(nodes_cnt);};
struct bpf_raw_tp_link { struct bpf_link link; struct bpf_raw_event_map *btp; u64 cookie;};
struct bpf_link_primer { struct bpf_link *link; struct file *file; int fd; u32 id;};
struct bpf_mount_opts { kuid_t uid; kgid_t gid; umode_t mode;
/* BPF token-related delegation options */ u64 delegate_cmds; u64 delegate_maps; u64 delegate_progs; u64 delegate_attachs;
struct simple_xattr_cache xa_cache;};
struct bpf_token { struct work_struct work; atomic64_t refcnt; struct user_namespace *userns; u64 allowed_cmds; u64 allowed_maps; u64 allowed_progs; u64 allowed_attachs;#ifdef CONFIG_SECURITY void *security;#endif};
struct bpf_struct_ops_value;struct btf_member;
#define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64/** * struct bpf_struct_ops - A structure of callbacks allowing a subsystem to * define a BPF_MAP_TYPE_STRUCT_OPS map type composed * of BPF_PROG_TYPE_STRUCT_OPS progs. * @verifier_ops: A structure of callbacks that are invoked by the verifier * when determining whether the struct_ops progs in the * struct_ops map are valid. * @init: A callback that is invoked a single time, and before any other * callback, to initialize the structure. A nonzero return value means * the subsystem could not be initialized. * @check_member: When defined, a callback invoked by the verifier to allow * the subsystem to determine if an entry in the struct_ops map * is valid. A nonzero return value means that the map is * invalid and should be rejected by the verifier. * @init_member: A callback that is invoked for each member of the struct_ops * map to allow the subsystem to initialize the member. A nonzero * value means the member could not be initialized. This callback * is exclusive with the @type, @type_id, @value_type, and * @value_id fields. * @reg: A callback that is invoked when the struct_ops map has been * initialized and is being attached to. Zero means the struct_ops map * has been successfully registered and is live. A nonzero return value * means the struct_ops map could not be registered. * @unreg: A callback that is invoked when the struct_ops map should be * unregistered. * @update: A callback that is invoked when the live struct_ops map is being * updated to contain new values. This callback is only invoked when * the struct_ops map is loaded with BPF_F_LINK. If not defined, the * it is assumed that the struct_ops map cannot be updated. * @validate: A callback that is invoked after all of the members have been * initialized. This callback should perform static checks on the * map, meaning that it should either fail or succeed * deterministically. A struct_ops map that has been validated may * not necessarily succeed in being registered if the call to @reg * fails. For example, a valid struct_ops map may be loaded, but * then fail to be registered due to there being another active * struct_ops map on the system in the subsystem already. For this * reason, if this callback is not defined, the check is skipped as * the struct_ops map will have final verification performed in * @reg. * @cfi_stubs: Pointer to a structure of stub functions for CFI. These stubs * provide the correct Control Flow Integrity hashes for the * trampolines generated by BPF struct_ops. * @owner: The module that owns this struct_ops. Used for module reference * counting to ensure the module providing the struct_ops cannot be * unloaded while in use. * @name: The name of the struct bpf_struct_ops object. * @func_models: Func models */struct bpf_struct_ops { const struct bpf_verifier_ops *verifier_ops; int (*init)(struct btf *btf); int (*check_member)(const struct btf_type *t, const struct btf_member *member, const struct bpf_prog *prog); int (*init_member)(const struct btf_type *t, const struct btf_member *member, void *kdata, const void *udata); int (*reg)(void *kdata, struct bpf_link *link); void (*unreg)(void *kdata, struct bpf_link *link); int (*update)(void *kdata, void *old_kdata, struct bpf_link *link); int (*validate)(void *kdata); void *cfi_stubs; struct module *owner; const char *name; struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];};
/* Every member of a struct_ops type has an instance even a member is not * an operator (function pointer). The "info" field will be assigned to * prog->aux->ctx_arg_info of BPF struct_ops programs to provide the * argument information required by the verifier to verify the program. * * btf_ctx_access() will lookup prog->aux->ctx_arg_info to find the * corresponding entry for an given argument. */struct bpf_struct_ops_arg_info { struct bpf_ctx_arg_aux *info; u32 cnt;};
struct bpf_struct_ops_desc { struct bpf_struct_ops *st_ops;
const struct btf_type *type; const struct btf_type *value_type; u32 type_id; u32 value_id;
/* Collection of argument information for each member */ struct bpf_struct_ops_arg_info *arg_info;};
enum bpf_struct_ops_state { BPF_STRUCT_OPS_STATE_INIT, BPF_STRUCT_OPS_STATE_INUSE, BPF_STRUCT_OPS_STATE_TOBEFREE, BPF_STRUCT_OPS_STATE_READY,};
struct bpf_struct_ops_common_value { refcount_t refcnt; enum bpf_struct_ops_state state;};
static inline bool bpf_prog_get_recursion_context(struct bpf_prog *prog){#ifdef CONFIG_ARM64 u8 rctx = interrupt_context_level(); u8 *active = this_cpu_ptr(prog->active); u32 val;
preempt_disable(); active[rctx]++; val = le32_to_cpu(*(__le32 *)active); preempt_enable(); if (val != BIT(rctx * 8)) return false;
return true;#else return this_cpu_inc_return(*(int __percpu *)(prog->active)) == 1;#endif}
static inline void bpf_prog_put_recursion_context(struct bpf_prog *prog){#ifdef CONFIG_ARM64 u8 rctx = interrupt_context_level(); u8 *active = this_cpu_ptr(prog->active);
preempt_disable(); active[rctx]--; preempt_enable();#else this_cpu_dec(*(int __percpu *)(prog->active));#endif}
static inline bool is_tracing_multi(enum bpf_attach_type type){ return type == BPF_TRACE_FENTRY_MULTI || type == BPF_TRACE_FEXIT_MULTI || type == BPF_TRACE_FSESSION_MULTI;}
#if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)/* This macro helps developer to register a struct_ops type and generate * type information correctly. Developers should use this macro to register * a struct_ops type instead of calling __register_bpf_struct_ops() directly. */#define register_bpf_struct_ops(st_ops, type) \ ({ \ struct bpf_struct_ops_##type { \ struct bpf_struct_ops_common_value common; \ struct type data ____cacheline_aligned_in_smp; \ }; \ BTF_TYPE_EMIT(struct bpf_struct_ops_##type); \ __register_bpf_struct_ops(st_ops); \ })#define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))bool bpf_struct_ops_get(const void *kdata);void bpf_struct_ops_put(const void *kdata);int bpf_struct_ops_supported(const struct bpf_struct_ops *st_ops, u32 moff);int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key, void *value);int bpf_struct_ops_prepare_trampoline(struct bpf_tramp_nodes *tnodes, struct bpf_tramp_node *node, const struct btf_func_model *model, void *stub_func, void **image, u32 *image_off, bool allow_alloc);void bpf_struct_ops_image_free(void *image);static inline bool bpf_try_module_get(const void *data, struct module *owner){ if (owner == BPF_MODULE_OWNER) return bpf_struct_ops_get(data); else return try_module_get(owner);}static inline void bpf_module_put(const void *data, struct module *owner){ if (owner == BPF_MODULE_OWNER) bpf_struct_ops_put(data); else module_put(owner);}int bpf_struct_ops_link_create(union bpf_attr *attr);int bpf_prog_assoc_struct_ops(struct bpf_prog *prog, struct bpf_map *map);void bpf_prog_disassoc_struct_ops(struct bpf_prog *prog);void *bpf_prog_get_assoc_struct_ops(const struct bpf_prog_aux *aux);u32 bpf_struct_ops_id(const void *kdata);int bpf_struct_ops_for_each_prog(const void *kdata, int (*cb)(struct bpf_prog *prog, void *data), void *data);
#ifdef CONFIG_NET/* Define it here to avoid the use of forward declaration */struct bpf_dummy_ops_state { int val;};
struct bpf_dummy_ops { int (*test_1)(struct bpf_dummy_ops_state *cb); int (*test_2)(struct bpf_dummy_ops_state *cb, int a1, unsigned short a2, char a3, unsigned long a4); int (*test_sleepable)(struct bpf_dummy_ops_state *cb);};
int bpf_struct_ops_test_run(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr);#endifint bpf_struct_ops_desc_init(struct bpf_struct_ops_desc *st_ops_desc, struct btf *btf, struct bpf_verifier_log *log);void bpf_map_struct_ops_info_fill(struct bpf_map_info *info, struct bpf_map *map);void bpf_struct_ops_desc_release(struct bpf_struct_ops_desc *st_ops_desc);#else#define register_bpf_struct_ops(st_ops, type) ({ (void *)(st_ops); 0; })static inline bool bpf_try_module_get(const void *data, struct module *owner){ return try_module_get(owner);}static inline void bpf_module_put(const void *data, struct module *owner){ module_put(owner);}static inline int bpf_struct_ops_supported(const struct bpf_struct_ops *st_ops, u32 moff){ return -ENOTSUPP;}static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key, void *value){ return -EINVAL;}static inline int bpf_struct_ops_link_create(union bpf_attr *attr){ return -EOPNOTSUPP;}static inline int bpf_prog_assoc_struct_ops(struct bpf_prog *prog, struct bpf_map *map){ return -EOPNOTSUPP;}static inline void bpf_prog_disassoc_struct_ops(struct bpf_prog *prog){}static inline void *bpf_prog_get_assoc_struct_ops(const struct bpf_prog_aux *aux){ return NULL;}static inline void bpf_map_struct_ops_info_fill(struct bpf_map_info *info, struct bpf_map *map){}
static inline void bpf_struct_ops_desc_release(struct bpf_struct_ops_desc *st_ops_desc){}
#endif
static inline int bpf_fsession_cnt(struct bpf_tramp_nodes *nodes){ struct bpf_tramp_nodes fentries = nodes[BPF_TRAMP_FENTRY]; int cnt = 0;
for (int i = 0; i < nodes[BPF_TRAMP_FENTRY].nr_nodes; i++) { if (fentries.nodes[i]->link->prog->expected_attach_type == BPF_TRACE_FSESSION) cnt++; if (fentries.nodes[i]->link->prog->expected_attach_type == BPF_TRACE_FSESSION_MULTI) cnt++; }
return cnt;}
static inline bool bpf_prog_calls_session_cookie(struct bpf_tramp_node *node){ return node->link->prog->call_session_cookie;}
static inline int bpf_fsession_cookie_cnt(struct bpf_tramp_nodes *nodes){ struct bpf_tramp_nodes fentries = nodes[BPF_TRAMP_FENTRY]; int cnt = 0;
for (int i = 0; i < nodes[BPF_TRAMP_FENTRY].nr_nodes; i++) { if (bpf_prog_calls_session_cookie(fentries.nodes[i])) cnt++; }
return cnt;}
int bpf_prog_ctx_arg_info_init(struct bpf_prog *prog, const struct bpf_ctx_arg_aux *info, u32 cnt);
#if defined(CONFIG_CGROUP_BPF) && defined(CONFIG_BPF_LSM)int bpf_trampoline_link_cgroup_shim(struct bpf_prog *prog, int cgroup_atype, enum bpf_attach_type attach_type);void bpf_trampoline_unlink_cgroup_shim(struct bpf_prog *prog);#elsestatic inline int bpf_trampoline_link_cgroup_shim(struct bpf_prog *prog, int cgroup_atype, enum bpf_attach_type attach_type){ return -EOPNOTSUPP;}static inline void bpf_trampoline_unlink_cgroup_shim(struct bpf_prog *prog){}#endif
struct bpf_array { struct bpf_map map; u32 elem_size; u32 index_mask; struct bpf_array_aux *aux; union { DECLARE_FLEX_ARRAY(char, value) __aligned(8); DECLARE_FLEX_ARRAY(void *, ptrs) __aligned(8); DECLARE_FLEX_ARRAY(void __percpu *, pptrs) __aligned(8); };};
/* * The bpf_array_get_next_key() function may be used for all array-like * maps, i.e., maps with u32 keys with range [0 ,..., max_entries) */int bpf_array_get_next_key(struct bpf_map *map, void *key, void *next_key);
#define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */#define MAX_TAIL_CALL_CNT 33
/* Maximum number of loops for bpf_loop and bpf_iter_num. * It's enum to expose it (and thus make it discoverable) through BTF. */enum { BPF_MAX_LOOPS = 8 * 1024 * 1024, BPF_MAX_TIMED_LOOPS = 0xffff,};
#define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \ BPF_F_RDONLY_PROG | \ BPF_F_WRONLY | \ BPF_F_WRONLY_PROG)
#define BPF_MAP_CAN_READ BIT(0)#define BPF_MAP_CAN_WRITE BIT(1)
/* Maximum number of user-producer ring buffer samples that can be drained in * a call to bpf_user_ringbuf_drain(). */#define BPF_MAX_USER_RINGBUF_SAMPLES (128 * 1024)
static inline u32 bpf_map_flags_to_cap(struct bpf_map *map){ u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
/* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is * not possible. */ if (access_flags & BPF_F_RDONLY_PROG) return BPF_MAP_CAN_READ; else if (access_flags & BPF_F_WRONLY_PROG) return BPF_MAP_CAN_WRITE; else return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;}
static inline bool bpf_map_flags_access_ok(u32 access_flags){ return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) != (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);}
static inline struct bpf_map_owner *bpf_map_owner_alloc(struct bpf_map *map){ return kzalloc_obj(*map->owner, GFP_ATOMIC);}
static inline void bpf_map_owner_free(struct bpf_map *map){ kfree(map->owner);}
struct bpf_event_entry { struct perf_event *event; struct file *perf_file; struct file *map_file; struct rcu_head rcu;};
static inline bool map_type_contains_progs(struct bpf_map *map){ return map->map_type == BPF_MAP_TYPE_PROG_ARRAY || map->map_type == BPF_MAP_TYPE_DEVMAP || map->map_type == BPF_MAP_TYPE_CPUMAP;}
bool bpf_prog_map_compatible(struct bpf_map *map, const struct bpf_prog *fp);int bpf_prog_calc_tag(struct bpf_prog *fp);
const struct bpf_func_proto *bpf_get_trace_printk_proto(void);const struct bpf_func_proto *bpf_get_trace_vprintk_proto(void);
const struct bpf_func_proto *bpf_get_perf_event_read_value_proto(void);
typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src, unsigned long off, unsigned long len);typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type, const struct bpf_insn *src, struct bpf_insn *dst, struct bpf_prog *prog, u32 *target_size);
u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size, void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
/* an array of programs to be executed under rcu_lock. * * Typical usage: * ret = bpf_prog_run_array(rcu_dereference(&bpf_prog_array), ctx, bpf_prog_run); * * the structure returned by bpf_prog_array_alloc() should be populated * with program pointers and the last pointer must be NULL. * The user has to keep refcnt on the program and make sure the program * is removed from the array before bpf_prog_put(). * The 'struct bpf_prog_array *' should only be replaced with xchg() * since other cpus are walking the array of pointers in parallel. */struct bpf_prog_array_item { struct bpf_prog *prog; union { struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; u64 bpf_cookie; };};
struct bpf_prog_array { struct rcu_head rcu; struct bpf_prog_array_item items[];};
/* to avoid allocating empty bpf_prog_array for cgroups that * don't have bpf program attached use one global 'bpf_empty_prog_array' * It will not be modified the caller of bpf_prog_array_alloc() * (since caller requested prog_cnt == 0) * that pointer should be 'freed' by bpf_prog_array_free() */extern struct bpf_prog_array bpf_empty_prog_array;
struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);void bpf_prog_array_free(struct bpf_prog_array *progs);/* Use when traversal over the bpf_prog_array uses tasks_trace rcu */void bpf_prog_array_free_sleepable(struct bpf_prog_array *progs);int bpf_prog_array_length(struct bpf_prog_array *progs);bool bpf_prog_array_is_empty(struct bpf_prog_array *array);int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs, __u32 __user *prog_ids, u32 cnt);
void bpf_prog_array_delete_safe(struct bpf_prog_array *progs, struct bpf_prog *old_prog);int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index);int bpf_prog_array_update_at(struct bpf_prog_array *array, int index, struct bpf_prog *prog);int bpf_prog_array_copy_info(struct bpf_prog_array *array, u32 *prog_ids, u32 request_cnt, u32 *prog_cnt);int bpf_prog_array_copy(struct bpf_prog_array *old_array, struct bpf_prog *exclude_prog, struct bpf_prog *include_prog, u64 bpf_cookie, struct bpf_prog_array **new_array);
struct bpf_run_ctx {};
struct bpf_cg_run_ctx { struct bpf_run_ctx run_ctx; const struct bpf_prog_array_item *prog_item; int retval;};
struct bpf_trace_run_ctx { struct bpf_run_ctx run_ctx; u64 bpf_cookie; bool is_uprobe;};
struct bpf_tramp_run_ctx { struct bpf_run_ctx run_ctx; u64 bpf_cookie; struct bpf_run_ctx *saved_run_ctx;};
static inline struct bpf_run_ctx *bpf_set_run_ctx(struct bpf_run_ctx *new_ctx){ struct bpf_run_ctx *old_ctx = NULL;
#ifdef CONFIG_BPF_SYSCALL old_ctx = current->bpf_ctx; current->bpf_ctx = new_ctx;#endif return old_ctx;}
static inline void bpf_reset_run_ctx(struct bpf_run_ctx *old_ctx){#ifdef CONFIG_BPF_SYSCALL current->bpf_ctx = old_ctx;#endif}
/* BPF program asks to bypass CAP_NET_BIND_SERVICE in bind. */#define BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE (1 << 0)/* BPF program asks to set CN on the packet. */#define BPF_RET_SET_CN (1 << 0)
typedef u32 (*bpf_prog_run_fn)(const struct bpf_prog *prog, const void *ctx);
static __always_inline u32bpf_prog_run_array(const struct bpf_prog_array *array, const void *ctx, bpf_prog_run_fn run_prog){ const struct bpf_prog_array_item *item; const struct bpf_prog *prog; struct bpf_run_ctx *old_run_ctx; struct bpf_trace_run_ctx run_ctx; u32 ret = 1;
RCU_LOCKDEP_WARN(!rcu_read_lock_held(), "no rcu lock held");
if (unlikely(!array)) return ret;
run_ctx.is_uprobe = false;
migrate_disable(); old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx); item = &array->items[0]; while ((prog = READ_ONCE(item->prog))) { run_ctx.bpf_cookie = item->bpf_cookie; ret &= run_prog(prog, ctx); item++; } bpf_reset_run_ctx(old_run_ctx); migrate_enable(); return ret;}
/* Notes on RCU design for bpf_prog_arrays containing sleepable programs: * * We use the tasks_trace rcu flavor read section to protect the bpf_prog_array * overall. As a result, we must use the bpf_prog_array_free_sleepable * in order to use the tasks_trace rcu grace period. * * When a non-sleepable program is inside the array, we take the rcu read * section and disable preemption for that program alone, so it can access * rcu-protected dynamically sized maps. */static __always_inline u32bpf_prog_run_array_uprobe(const struct bpf_prog_array *array, const void *ctx, bpf_prog_run_fn run_prog){ const struct bpf_prog_array_item *item; const struct bpf_prog *prog; struct bpf_run_ctx *old_run_ctx; struct bpf_trace_run_ctx run_ctx; u32 ret = 1;
might_fault(); RCU_LOCKDEP_WARN(!rcu_read_lock_trace_held(), "no rcu lock held");
if (unlikely(!array)) return ret;
migrate_disable();
run_ctx.is_uprobe = true;
old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx); item = &array->items[0]; while ((prog = READ_ONCE(item->prog))) { if (!prog->sleepable) rcu_read_lock();
run_ctx.bpf_cookie = item->bpf_cookie; ret &= run_prog(prog, ctx); item++;
if (!prog->sleepable) rcu_read_unlock(); } bpf_reset_run_ctx(old_run_ctx); migrate_enable(); return ret;}
bool bpf_jit_bypass_spec_v1(void);bool bpf_jit_bypass_spec_v4(void);
#define bpf_rcu_lock_held() \ (rcu_read_lock_held() || rcu_read_lock_trace_held() || rcu_read_lock_bh_held())
#ifdef CONFIG_BPF_SYSCALLDECLARE_PER_CPU(int, bpf_prog_active);extern struct mutex bpf_stats_enabled_mutex;
/* * Block execution of BPF programs attached to instrumentation (perf, * kprobes, tracepoints) to prevent deadlocks on map operations as any of * these events can happen inside a region which holds a map bucket lock * and can deadlock on it. */static inline void bpf_disable_instrumentation(void){ migrate_disable(); this_cpu_inc(bpf_prog_active);}
static inline void bpf_enable_instrumentation(void){ this_cpu_dec(bpf_prog_active); migrate_enable();}
extern const struct super_operations bpf_super_ops;extern const struct file_operations bpf_map_fops;extern const struct file_operations bpf_prog_fops;extern const struct file_operations bpf_iter_fops;extern const struct file_operations bpf_token_fops;
#define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \ extern const struct bpf_prog_ops _name ## _prog_ops; \ extern const struct bpf_verifier_ops _name ## _verifier_ops;#define BPF_MAP_TYPE(_id, _ops) \ extern const struct bpf_map_ops _ops;#define BPF_LINK_TYPE(_id, _name)#include <linux/bpf_types.h>#undef BPF_PROG_TYPE#undef BPF_MAP_TYPE#undef BPF_LINK_TYPE
extern const struct bpf_prog_ops bpf_offload_prog_ops;extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;extern const struct bpf_verifier_ops xdp_analyzer_ops;
struct bpf_prog *bpf_prog_get(u32 ufd);struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type, bool attach_drv);void bpf_prog_add(struct bpf_prog *prog, int i);void bpf_prog_sub(struct bpf_prog *prog, int i);void bpf_prog_inc(struct bpf_prog *prog);struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);void bpf_prog_put(struct bpf_prog *prog);
void bpf_prog_free_id(struct bpf_prog *prog);void bpf_map_free_id(struct bpf_map *map);
struct btf_field *btf_record_find(const struct btf_record *rec, u32 offset, u32 field_mask);void btf_record_free(struct btf_record *rec);void bpf_map_free_record(struct bpf_map *map);struct btf_record *btf_record_dup(const struct btf_record *rec);bool btf_record_equal(const struct btf_record *rec_a, const struct btf_record *rec_b);void bpf_obj_free_timer(const struct btf_record *rec, void *obj);void bpf_obj_free_workqueue(const struct btf_record *rec, void *obj);void bpf_obj_free_task_work(const struct btf_record *rec, void *obj);void bpf_obj_cancel_fields(struct bpf_map *map, void *obj);void bpf_obj_free_fields(const struct btf_record *rec, void *obj);void __bpf_obj_drop_impl(void *p, const struct btf_record *rec, bool percpu);
struct bpf_map *bpf_map_get(u32 ufd);struct bpf_map *bpf_map_get_with_uref(u32 ufd);
/* * The __bpf_map_get() and __btf_get_by_fd() functions parse a file * descriptor and return a corresponding map or btf object. * Their names are double underscored to emphasize the fact that they * do not increase refcnt. To also increase refcnt use corresponding * bpf_map_get() and btf_get_by_fd() functions. */
static inline struct bpf_map *__bpf_map_get(struct fd f){ if (fd_empty(f)) return ERR_PTR(-EBADF); if (unlikely(fd_file(f)->f_op != &bpf_map_fops)) return ERR_PTR(-EINVAL); return fd_file(f)->private_data;}
static inline struct btf *__btf_get_by_fd(struct fd f){ if (fd_empty(f)) return ERR_PTR(-EBADF); if (unlikely(fd_file(f)->f_op != &btf_fops)) return ERR_PTR(-EINVAL); return fd_file(f)->private_data;}
void bpf_map_inc(struct bpf_map *map);void bpf_map_inc_with_uref(struct bpf_map *map);struct bpf_map *__bpf_map_inc_not_zero(struct bpf_map *map, bool uref);struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);void bpf_map_put_with_uref(struct bpf_map *map);void bpf_map_put(struct bpf_map *map);void *bpf_map_area_alloc(u64 size, int numa_node);void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);void bpf_map_area_free(void *base);bool bpf_map_write_active(const struct bpf_map *map);void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);int generic_map_lookup_batch(struct bpf_map *map, const union bpf_attr *attr, union bpf_attr __user *uattr);int generic_map_update_batch(struct bpf_map *map, struct file *map_file, const union bpf_attr *attr, union bpf_attr __user *uattr);int generic_map_delete_batch(struct bpf_map *map, const union bpf_attr *attr, union bpf_attr __user *uattr);struct bpf_map *bpf_map_get_curr_or_next(u32 *id);struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id);
int bpf_map_alloc_pages(const struct bpf_map *map, int nid, unsigned long nr_pages, struct page **page_array);#ifdef CONFIG_MEMCGvoid bpf_map_memcg_enter(const struct bpf_map *map, struct mem_cgroup **old_memcg, struct mem_cgroup **new_memcg);void bpf_map_memcg_exit(struct mem_cgroup *old_memcg, struct mem_cgroup *memcg);void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags, int node);void *bpf_map_kmalloc_nolock(const struct bpf_map *map, size_t size, gfp_t flags, int node);void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags);void *bpf_map_kvcalloc(struct bpf_map *map, size_t n, size_t size, gfp_t flags);void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, size_t align, gfp_t flags);#else/* * These specialized allocators have to be macros for their allocations to be * accounted separately (to have separate alloc_tag). */#define bpf_map_kmalloc_node(_map, _size, _flags, _node) \ kmalloc_node(_size, _flags, _node)#define bpf_map_kmalloc_nolock(_map, _size, _flags, _node) \ kmalloc_nolock(_size, _flags, _node)#define bpf_map_kzalloc(_map, _size, _flags) \ kzalloc(_size, _flags)#define bpf_map_kvcalloc(_map, _n, _size, _flags) \ kvcalloc(_n, _size, _flags)#define bpf_map_alloc_percpu(_map, _size, _align, _flags) \ __alloc_percpu_gfp(_size, _align, _flags)static inline void bpf_map_memcg_enter(const struct bpf_map *map, struct mem_cgroup **old_memcg, struct mem_cgroup **new_memcg){ *new_memcg = NULL; *old_memcg = NULL;}
static inline void bpf_map_memcg_exit(struct mem_cgroup *old_memcg, struct mem_cgroup *memcg){}#endif
static inline intbpf_map_init_elem_count(struct bpf_map *map){ size_t size = sizeof(*map->elem_count), align = size; gfp_t flags = GFP_USER | __GFP_NOWARN;
map->elem_count = bpf_map_alloc_percpu(map, size, align, flags); if (!map->elem_count) return -ENOMEM;
return 0;}
static inline voidbpf_map_free_elem_count(struct bpf_map *map){ free_percpu(map->elem_count);}
static inline void bpf_map_inc_elem_count(struct bpf_map *map){ this_cpu_inc(*map->elem_count);}
static inline void bpf_map_dec_elem_count(struct bpf_map *map){ this_cpu_dec(*map->elem_count);}
extern int sysctl_unprivileged_bpf_disabled;
bool bpf_token_capable(const struct bpf_token *token, int cap);
static inline bool bpf_allow_ptr_leaks(const struct bpf_token *token){ return bpf_token_capable(token, CAP_PERFMON);}
static inline bool bpf_allow_uninit_stack(const struct bpf_token *token){ return bpf_token_capable(token, CAP_PERFMON);}
static inline bool bpf_bypass_spec_v1(const struct bpf_token *token){ return bpf_jit_bypass_spec_v1() || cpu_mitigations_off() || bpf_token_capable(token, CAP_PERFMON);}
static inline bool bpf_bypass_spec_v4(const struct bpf_token *token){ return bpf_jit_bypass_spec_v4() || cpu_mitigations_off() || bpf_token_capable(token, CAP_PERFMON);}
int bpf_map_new_fd(struct bpf_map *map, int flags);int bpf_prog_new_fd(struct bpf_prog *prog);
void bpf_link_init(struct bpf_link *link, enum bpf_link_type type, const struct bpf_link_ops *ops, struct bpf_prog *prog, enum bpf_attach_type attach_type);void bpf_link_init_sleepable(struct bpf_link *link, enum bpf_link_type type, const struct bpf_link_ops *ops, struct bpf_prog *prog, enum bpf_attach_type attach_type, bool sleepable);void bpf_tramp_link_init(struct bpf_tramp_link *link, enum bpf_link_type type, const struct bpf_link_ops *ops, struct bpf_prog *prog, enum bpf_attach_type attach_type, u64 cookie);int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer);int bpf_link_settle(struct bpf_link_primer *primer);void bpf_link_cleanup(struct bpf_link_primer *primer);void bpf_link_inc(struct bpf_link *link);struct bpf_link *bpf_link_inc_not_zero(struct bpf_link *link);void bpf_link_put(struct bpf_link *link);int bpf_link_new_fd(struct bpf_link *link);struct bpf_link *bpf_link_get_from_fd(u32 ufd);struct bpf_link *bpf_link_get_curr_or_next(u32 *id);
void bpf_token_inc(struct bpf_token *token);void bpf_token_put(struct bpf_token *token);int bpf_token_create(union bpf_attr *attr);struct bpf_token *bpf_token_get_from_fd(u32 ufd);int bpf_token_get_info_by_fd(struct bpf_token *token, const union bpf_attr *attr, union bpf_attr __user *uattr);
bool bpf_token_allow_cmd(const struct bpf_token *token, enum bpf_cmd cmd);bool bpf_token_allow_map_type(const struct bpf_token *token, enum bpf_map_type type);bool bpf_token_allow_prog_type(const struct bpf_token *token, enum bpf_prog_type prog_type, enum bpf_attach_type attach_type);
int bpf_obj_pin_user(u32 ufd, int path_fd, const char __user *pathname);int bpf_obj_get_user(int path_fd, const char __user *pathname, int flags);struct inode *bpf_get_inode(struct super_block *sb, const struct inode *dir, umode_t mode);
#define BPF_ITER_FUNC_PREFIX "bpf_iter_"#define DEFINE_BPF_ITER_FUNC(target, args...) \ extern int bpf_iter_ ## target(args); \ int __init bpf_iter_ ## target(args) { return 0; }
/* * The task type of iterators. * * For BPF task iterators, they can be parameterized with various * parameters to visit only some of tasks. * * BPF_TASK_ITER_ALL (default) * Iterate over resources of every task. * * BPF_TASK_ITER_TID * Iterate over resources of a task/tid. * * BPF_TASK_ITER_TGID * Iterate over resources of every task of a process / task group. */enum bpf_iter_task_type { BPF_TASK_ITER_ALL = 0, BPF_TASK_ITER_TID, BPF_TASK_ITER_TGID,};
struct bpf_iter_aux_info { /* for map_elem iter */ struct bpf_map *map;
/* for cgroup iter */ struct { struct cgroup *start; /* starting cgroup */ enum bpf_cgroup_iter_order order; } cgroup; struct { enum bpf_iter_task_type type; u32 pid; } task;};
typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog, union bpf_iter_link_info *linfo, struct bpf_iter_aux_info *aux);typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux);typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux, struct seq_file *seq);typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux, struct bpf_link_info *info);typedef const struct bpf_func_proto *(*bpf_iter_get_func_proto_t)(enum bpf_func_id func_id, const struct bpf_prog *prog);
enum bpf_iter_feature { BPF_ITER_RESCHED = BIT(0),};
#define BPF_ITER_CTX_ARG_MAX 2struct bpf_iter_reg { const char *target; bpf_iter_attach_target_t attach_target; bpf_iter_detach_target_t detach_target; bpf_iter_show_fdinfo_t show_fdinfo; bpf_iter_fill_link_info_t fill_link_info; bpf_iter_get_func_proto_t get_func_proto; u32 ctx_arg_info_size; u32 feature; struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX]; const struct bpf_iter_seq_info *seq_info;};
struct bpf_iter_meta { __bpf_md_ptr(struct seq_file *, seq); u64 session_id; u64 seq_num;};
struct bpf_iter__bpf_map_elem { __bpf_md_ptr(struct bpf_iter_meta *, meta); __bpf_md_ptr(struct bpf_map *, map); __bpf_md_ptr(void *, key); __bpf_md_ptr(void *, value);};
int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info);void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info);int bpf_iter_prog_supported(struct bpf_prog *prog);const struct bpf_func_proto *bpf_iter_get_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog);int bpf_iter_link_attach(const union bpf_attr *attr, bpfptr_t uattr, struct bpf_prog *prog);int bpf_iter_new_fd(struct bpf_link *link);bool bpf_link_is_iter(struct bpf_link *link);struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop);int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx);void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux, struct seq_file *seq);int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux, struct bpf_link_info *info);
int map_set_for_each_callback_args(struct bpf_verifier_env *env, struct bpf_func_state *caller, struct bpf_func_state *callee);
int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value, u64 flags);int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value, u64 flags);int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value, u64 flags);int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value, u64 flags);
int bpf_stackmap_extract(struct bpf_map *map, void *key, void *value, bool delete);
int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file, void *key, void *value, u64 map_flags);int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file, void *key, void *value, u64 map_flags);int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
int bpf_get_file_flag(int flags);int bpf_check_uarg_tail_zero(bpfptr_t uaddr, size_t expected_size, size_t actual_size);
/* verify correctness of eBPF program */struct bpf_log_attr;int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, bpfptr_t uattr, struct bpf_log_attr *attr_log);
#ifndef CONFIG_BPF_JIT_ALWAYS_ONint bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);s32 bpf_call_args_imm(s16 idx);#elsestatic inline s32 bpf_call_args_imm(s16 idx){ return 0;}#endif
struct btf *bpf_get_btf_vmlinux(void);
/* Map specifics */struct xdp_frame;struct sk_buff;struct bpf_dtab_netdev;struct bpf_cpu_map_entry;
void __dev_flush(struct list_head *flush_list);int dev_xdp_enqueue(struct net_device *dev, struct xdp_frame *xdpf, struct net_device *dev_rx);int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_frame *xdpf, struct net_device *dev_rx);int dev_map_enqueue_multi(struct xdp_frame *xdpf, struct net_device *dev_rx, struct bpf_map *map, bool exclude_ingress);int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb, const struct bpf_prog *xdp_prog);int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb, const struct bpf_prog *xdp_prog, struct bpf_map *map, bool exclude_ingress);
void __cpu_map_flush(struct list_head *flush_list);int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf, struct net_device *dev_rx);int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu, struct sk_buff *skb);
/* Return map's numa specified by userspace */static inline int bpf_map_attr_numa_node(const union bpf_attr *attr){ return (attr->map_flags & BPF_F_NUMA_NODE) ? attr->numa_node : NUMA_NO_NODE;}
struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);int array_map_alloc_check(union bpf_attr *attr);
int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr);int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr);int bpf_prog_test_run_tracing(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr);int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr);int bpf_prog_test_run_raw_tp(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr);int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr);int bpf_prog_test_run_nf(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr);bool btf_ctx_access(int off, int size, enum bpf_access_type type, const struct bpf_prog *prog, struct bpf_insn_access_aux *info);
static inline bool bpf_tracing_ctx_access(int off, int size, enum bpf_access_type type){ if (off < 0 || off >= sizeof(__u64) * MAX_BPF_FUNC_ARGS) return false; if (type != BPF_READ) return false; if (off % size != 0) return false; return true;}
static inline bool bpf_tracing_btf_ctx_access(int off, int size, enum bpf_access_type type, const struct bpf_prog *prog, struct bpf_insn_access_aux *info){ if (!bpf_tracing_ctx_access(off, size, type)) return false; return btf_ctx_access(off, size, type, prog, info);}
int btf_struct_access(struct bpf_verifier_log *log, const struct bpf_reg_state *reg, int off, int size, enum bpf_access_type atype, u32 *next_btf_id, enum bpf_type_flag *flag, const char **field_name);bool btf_struct_ids_match(struct bpf_verifier_log *log, const struct btf *btf, u32 id, int off, const struct btf *need_btf, u32 need_type_id, bool strict);
int btf_distill_func_proto(struct bpf_verifier_log *log, struct btf *btf, const struct btf_type *func_proto, const char *func_name, struct btf_func_model *m);
struct bpf_reg_state;int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog);int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog, struct btf *btf, const struct btf_type *t);const char *btf_find_decl_tag_value(const struct btf *btf, const struct btf_type *pt, int comp_idx, const char *tag_key);int btf_find_next_decl_tag(const struct btf *btf, const struct btf_type *pt, int comp_idx, const char *tag_key, int last_id);
struct bpf_prog *bpf_prog_by_id(u32 id);struct bpf_link *bpf_link_by_id(u32 id);
const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog);void bpf_task_storage_free(struct task_struct *task);void bpf_cgrp_storage_free(struct cgroup *cgroup);bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog);const struct btf_func_model *bpf_jit_find_kfunc_model(const struct bpf_prog *prog, const struct bpf_insn *insn);int bpf_get_kfunc_addr(const struct bpf_prog *prog, u32 func_id, u16 btf_fd_idx, u8 **func_addr);
struct bpf_core_ctx { struct bpf_verifier_log *log; const struct btf *btf;};
bool btf_nested_type_is_trusted(struct bpf_verifier_log *log, const struct bpf_reg_state *reg, const char *field_name, u32 btf_id, const char *suffix);
bool btf_type_ids_nocast_alias(struct bpf_verifier_log *log, const struct btf *reg_btf, u32 reg_id, const struct btf *arg_btf, u32 arg_id);
int bpf_core_apply(struct bpf_core_ctx *ctx, const struct bpf_core_relo *relo, int relo_idx, void *insn);
static inline bool unprivileged_ebpf_enabled(void){ return !sysctl_unprivileged_bpf_disabled;}
/* Not all bpf prog type has the bpf_ctx. * For the bpf prog type that has initialized the bpf_ctx, * this function can be used to decide if a kernel function * is called by a bpf program. */static inline bool has_current_bpf_ctx(void){ return !!current->bpf_ctx;}
void notrace bpf_prog_inc_misses_counter(struct bpf_prog *prog);
void bpf_dynptr_init(struct bpf_dynptr_kern *ptr, void *data, enum bpf_dynptr_type type, u32 offset, u32 size);void bpf_dynptr_set_null(struct bpf_dynptr_kern *ptr);void bpf_dynptr_set_rdonly(struct bpf_dynptr_kern *ptr);void bpf_prog_report_arena_violation(bool write, unsigned long addr, unsigned long fault_ip);
static __always_inline u32bpf_prog_run_array_sleepable(const struct bpf_prog_array *array, const void *ctx, bpf_prog_run_fn run_prog){ const struct bpf_prog_array_item *item; struct bpf_prog *prog; struct bpf_run_ctx *old_run_ctx; struct bpf_trace_run_ctx run_ctx; u32 ret = 1;
if (unlikely(!array)) return ret;
migrate_disable();
run_ctx.is_uprobe = false;
old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx); item = &array->items[0]; while ((prog = READ_ONCE(item->prog))) { /* Skip dummy_bpf_prog placeholder (len == 0) */ if (unlikely(!prog->len)) { item++; continue; }
if (unlikely(!bpf_prog_get_recursion_context(prog))) { bpf_prog_inc_misses_counter(prog); bpf_prog_put_recursion_context(prog); item++; continue; }
run_ctx.bpf_cookie = item->bpf_cookie;
if (!prog->sleepable) { guard(rcu)(); ret &= run_prog(prog, ctx); } else { ret &= run_prog(prog, ctx); }
bpf_prog_put_recursion_context(prog); item++; } bpf_reset_run_ctx(old_run_ctx); migrate_enable(); return ret;}
#else /* !CONFIG_BPF_SYSCALL */static inline struct bpf_prog *bpf_prog_get(u32 ufd){ return ERR_PTR(-EOPNOTSUPP);}
static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type, bool attach_drv){ return ERR_PTR(-EOPNOTSUPP);}
static inline void bpf_prog_add(struct bpf_prog *prog, int i){}
static inline void bpf_prog_sub(struct bpf_prog *prog, int i){}
static inline void bpf_prog_put(struct bpf_prog *prog){}
static inline void bpf_prog_inc(struct bpf_prog *prog){}
static inline struct bpf_prog *__must_checkbpf_prog_inc_not_zero(struct bpf_prog *prog){ return ERR_PTR(-EOPNOTSUPP);}
static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type, const struct bpf_link_ops *ops, struct bpf_prog *prog, enum bpf_attach_type attach_type){}
static inline void bpf_link_init_sleepable(struct bpf_link *link, enum bpf_link_type type, const struct bpf_link_ops *ops, struct bpf_prog *prog, enum bpf_attach_type attach_type, bool sleepable){}
static inline void bpf_tramp_link_init(struct bpf_tramp_link *link, enum bpf_link_type type, const struct bpf_link_ops *ops, struct bpf_prog *prog, enum bpf_attach_type attach_type, u64 cookie){}
static inline int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer){ return -EOPNOTSUPP;}
static inline int bpf_link_settle(struct bpf_link_primer *primer){ return -EOPNOTSUPP;}
static inline void bpf_link_cleanup(struct bpf_link_primer *primer){}
static inline void bpf_link_inc(struct bpf_link *link){}
static inline struct bpf_link *bpf_link_inc_not_zero(struct bpf_link *link){ return NULL;}
static inline void bpf_link_put(struct bpf_link *link){}
static inline int bpf_obj_get_user(const char __user *pathname, int flags){ return -EOPNOTSUPP;}
static inline bool bpf_token_capable(const struct bpf_token *token, int cap){ return capable(cap) || (cap != CAP_SYS_ADMIN && capable(CAP_SYS_ADMIN));}
static inline void bpf_token_inc(struct bpf_token *token){}
static inline void bpf_token_put(struct bpf_token *token){}
static inline struct bpf_token *bpf_token_get_from_fd(u32 ufd){ return ERR_PTR(-EOPNOTSUPP);}
static inline int bpf_token_get_info_by_fd(struct bpf_token *token, const union bpf_attr *attr, union bpf_attr __user *uattr){ return -EOPNOTSUPP;}
static inline void __dev_flush(struct list_head *flush_list){}
struct xdp_frame;struct bpf_dtab_netdev;struct bpf_cpu_map_entry;
static inlineint dev_xdp_enqueue(struct net_device *dev, struct xdp_frame *xdpf, struct net_device *dev_rx){ return 0;}
static inlineint dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_frame *xdpf, struct net_device *dev_rx){ return 0;}
static inlineint dev_map_enqueue_multi(struct xdp_frame *xdpf, struct net_device *dev_rx, struct bpf_map *map, bool exclude_ingress){ return 0;}
struct sk_buff;
static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb, const struct bpf_prog *xdp_prog){ return 0;}
static inlineint dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb, const struct bpf_prog *xdp_prog, struct bpf_map *map, bool exclude_ingress){ return 0;}
static inline void __cpu_map_flush(struct list_head *flush_list){}
static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf, struct net_device *dev_rx){ return 0;}
static inline int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu, struct sk_buff *skb){ return -EOPNOTSUPP;}
static inline struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type){ return ERR_PTR(-EOPNOTSUPP);}
static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr){ return -ENOTSUPP;}
static inline int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr){ return -ENOTSUPP;}
static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr){ return -ENOTSUPP;}
static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr){ return -ENOTSUPP;}
static inline int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr){ return -ENOTSUPP;}
static inline void bpf_map_put(struct bpf_map *map){}
static inline struct bpf_prog *bpf_prog_by_id(u32 id){ return ERR_PTR(-ENOTSUPP);}
static inline int btf_struct_access(struct bpf_verifier_log *log, const struct bpf_reg_state *reg, int off, int size, enum bpf_access_type atype, u32 *next_btf_id, enum bpf_type_flag *flag, const char **field_name){ return -EACCES;}
static inline const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog){ return NULL;}
static inline void bpf_task_storage_free(struct task_struct *task){}
static inline bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog){ return false;}
static inline const struct btf_func_model *bpf_jit_find_kfunc_model(const struct bpf_prog *prog, const struct bpf_insn *insn){ return NULL;}
static inline intbpf_get_kfunc_addr(const struct bpf_prog *prog, u32 func_id, u16 btf_fd_idx, u8 **func_addr){ return -ENOTSUPP;}
static inline bool unprivileged_ebpf_enabled(void){ return false;}
static inline bool has_current_bpf_ctx(void){ return false;}
static inline void bpf_prog_inc_misses_counter(struct bpf_prog *prog){}
static inline void bpf_cgrp_storage_free(struct cgroup *cgroup){}
static inline void bpf_dynptr_init(struct bpf_dynptr_kern *ptr, void *data, enum bpf_dynptr_type type, u32 offset, u32 size){}
static inline void bpf_dynptr_set_null(struct bpf_dynptr_kern *ptr){}
static inline void bpf_dynptr_set_rdonly(struct bpf_dynptr_kern *ptr){}
static inline void bpf_prog_report_arena_violation(bool write, unsigned long addr, unsigned long fault_ip){}#endif /* CONFIG_BPF_SYSCALL */
static inline bool bpf_net_capable(void){ return capable(CAP_NET_ADMIN) || capable(CAP_SYS_ADMIN);}
static __always_inline intbpf_probe_read_kernel_common(void *dst, u32 size, const void *unsafe_ptr){ int ret = -EFAULT;
if (IS_ENABLED(CONFIG_BPF_EVENTS)) ret = copy_from_kernel_nofault(dst, unsafe_ptr, size); if (unlikely(ret < 0)) memset(dst, 0, size); return ret;}
void __bpf_free_used_btfs(struct btf_mod_pair *used_btfs, u32 len);
static inline struct bpf_prog *bpf_prog_get_type(u32 ufd, enum bpf_prog_type type){ return bpf_prog_get_type_dev(ufd, type, false);}
void __bpf_free_used_maps(struct bpf_prog_aux *aux, struct bpf_map **used_maps, u32 len);
bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
int bpf_prog_offload_compile(struct bpf_prog *prog);void bpf_prog_dev_bound_destroy(struct bpf_prog *prog);int bpf_prog_offload_info_fill(struct bpf_prog_info *info, struct bpf_prog *prog);
int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);int bpf_map_offload_update_elem(struct bpf_map *map, void *key, void *value, u64 flags);int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);int bpf_map_offload_get_next_key(struct bpf_map *map, void *key, void *next_key);
bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
struct bpf_offload_dev *bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev, struct net_device *netdev);void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev, struct net_device *netdev);bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
void unpriv_ebpf_notify(int new_state);
#if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)int bpf_dev_bound_kfunc_check(struct bpf_verifier_log *log, struct bpf_prog_aux *prog_aux);void *bpf_dev_bound_resolve_kfunc(struct bpf_prog *prog, u32 func_id);int bpf_prog_dev_bound_init(struct bpf_prog *prog, union bpf_attr *attr);int bpf_prog_dev_bound_inherit(struct bpf_prog *new_prog, struct bpf_prog *old_prog);void bpf_dev_bound_netdev_unregister(struct net_device *dev);
static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux){ return aux->dev_bound;}
static inline bool bpf_prog_is_offloaded(const struct bpf_prog_aux *aux){ return aux->offload_requested;}
bool bpf_prog_dev_bound_match(const struct bpf_prog *lhs, const struct bpf_prog *rhs);
static inline bool bpf_map_is_offloaded(struct bpf_map *map){ return unlikely(map->ops == &bpf_map_offload_ops);}
struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);void bpf_map_offload_map_free(struct bpf_map *map);u64 bpf_map_offload_map_mem_usage(const struct bpf_map *map);int bpf_prog_test_run_syscall(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr);
int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags);int sock_map_bpf_prog_query(const union bpf_attr *attr, union bpf_attr __user *uattr);int sock_map_link_create(const union bpf_attr *attr, struct bpf_prog *prog);
void sock_map_unhash(struct sock *sk);void sock_map_destroy(struct sock *sk);void sock_map_close(struct sock *sk, long timeout);#elsestatic inline int bpf_dev_bound_kfunc_check(struct bpf_verifier_log *log, struct bpf_prog_aux *prog_aux){ return -EOPNOTSUPP;}
static inline void *bpf_dev_bound_resolve_kfunc(struct bpf_prog *prog, u32 func_id){ return NULL;}
static inline int bpf_prog_dev_bound_init(struct bpf_prog *prog, union bpf_attr *attr){ return -EOPNOTSUPP;}
static inline int bpf_prog_dev_bound_inherit(struct bpf_prog *new_prog, struct bpf_prog *old_prog){ return -EOPNOTSUPP;}
static inline void bpf_dev_bound_netdev_unregister(struct net_device *dev){}
static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux){ return false;}
static inline bool bpf_prog_is_offloaded(struct bpf_prog_aux *aux){ return false;}
static inline bool bpf_prog_dev_bound_match(const struct bpf_prog *lhs, const struct bpf_prog *rhs){ return false;}
static inline bool bpf_map_is_offloaded(struct bpf_map *map){ return false;}
static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr){ return ERR_PTR(-EOPNOTSUPP);}
static inline void bpf_map_offload_map_free(struct bpf_map *map){}
static inline u64 bpf_map_offload_map_mem_usage(const struct bpf_map *map){ return 0;}
static inline int bpf_prog_test_run_syscall(struct bpf_prog *prog, const union bpf_attr *kattr, union bpf_attr __user *uattr){ return -ENOTSUPP;}
#ifdef CONFIG_BPF_SYSCALLstatic inline int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog){ return -EINVAL;}
static inline int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype){ return -EOPNOTSUPP;}
static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags){ return -EOPNOTSUPP;}
static inline int sock_map_bpf_prog_query(const union bpf_attr *attr, union bpf_attr __user *uattr){ return -EINVAL;}
static inline int sock_map_link_create(const union bpf_attr *attr, struct bpf_prog *prog){ return -EOPNOTSUPP;}#endif /* CONFIG_BPF_SYSCALL */#endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
static __always_inline voidbpf_prog_inc_misses_counters(const struct bpf_prog_array *array){ const struct bpf_prog_array_item *item; struct bpf_prog *prog;
if (unlikely(!array)) return;
item = &array->items[0]; while ((prog = READ_ONCE(item->prog))) { bpf_prog_inc_misses_counter(prog); item++; }}
#if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)void bpf_sk_reuseport_detach(struct sock *sk);int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key, void *value);int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key, void *value, u64 map_flags);#elsestatic inline void bpf_sk_reuseport_detach(struct sock *sk){}
#ifdef CONFIG_BPF_SYSCALLstatic inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key, void *value){ return -EOPNOTSUPP;}
static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key, void *value, u64 map_flags){ return -EOPNOTSUPP;}#endif /* CONFIG_BPF_SYSCALL */#endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
#ifdef CONFIG_KEYSstruct bpf_key { struct key *key; bool has_ref;};#endif /* CONFIG_KEYS */
#if defined(CONFIG_KEYS) && defined(CONFIG_BPF_SYSCALL)struct bpf_key *bpf_lookup_user_key(s32 serial, u64 flags);struct bpf_key *bpf_lookup_system_key(u64 id);void bpf_key_put(struct bpf_key *bkey);int bpf_verify_pkcs7_signature(const struct bpf_dynptr *data_p, const struct bpf_dynptr *sig_p, struct bpf_key *trusted_keyring);
static inline s32 bpf_key_serial(const struct bpf_key *key){ return key->has_ref ? key->key->serial : 0;}#elsestatic inline struct bpf_key *bpf_lookup_user_key(u32 serial, u64 flags){ return NULL;}
static inline struct bpf_key *bpf_lookup_system_key(u64 id){ return NULL;}
static inline void bpf_key_put(struct bpf_key *bkey){}
static inline int bpf_verify_pkcs7_signature(const struct bpf_dynptr *data_p, const struct bpf_dynptr *sig_p, struct bpf_key *trusted_keyring){ return -EOPNOTSUPP;}
static inline s32 bpf_key_serial(const struct bpf_key *key){ return 0;}#endif /* defined(CONFIG_KEYS) && defined(CONFIG_BPF_SYSCALL) */
/* verifier prototypes for helper functions called from eBPF programs */extern const struct bpf_func_proto bpf_map_lookup_elem_proto;extern const struct bpf_func_proto bpf_map_update_elem_proto;extern const struct bpf_func_proto bpf_map_delete_elem_proto;extern const struct bpf_func_proto bpf_map_push_elem_proto;extern const struct bpf_func_proto bpf_map_pop_elem_proto;extern const struct bpf_func_proto bpf_map_peek_elem_proto;extern const struct bpf_func_proto bpf_map_lookup_percpu_elem_proto;
extern const struct bpf_func_proto bpf_get_prandom_u32_proto;extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;extern const struct bpf_func_proto bpf_get_numa_node_id_proto;extern const struct bpf_func_proto bpf_tail_call_proto;extern const struct bpf_func_proto bpf_ktime_get_ns_proto;extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto;extern const struct bpf_func_proto bpf_ktime_get_tai_ns_proto;extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;extern const struct bpf_func_proto bpf_get_current_comm_proto;extern const struct bpf_func_proto bpf_get_stackid_proto;extern const struct bpf_func_proto bpf_get_stack_proto;extern const struct bpf_func_proto bpf_get_stack_sleepable_proto;extern const struct bpf_func_proto bpf_get_task_stack_proto;extern const struct bpf_func_proto bpf_get_task_stack_sleepable_proto;extern const struct bpf_func_proto bpf_get_stackid_proto_pe;extern const struct bpf_func_proto bpf_get_stack_proto_pe;extern const struct bpf_func_proto bpf_sock_map_update_proto;extern const struct bpf_func_proto bpf_sock_hash_update_proto;extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto;extern const struct bpf_func_proto bpf_get_cgroup_classid_curr_proto;extern const struct bpf_func_proto bpf_current_task_under_cgroup_proto;extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;extern const struct bpf_func_proto bpf_msg_redirect_map_proto;extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;extern const struct bpf_func_proto bpf_sk_redirect_map_proto;extern const struct bpf_func_proto bpf_spin_lock_proto;extern const struct bpf_func_proto bpf_spin_unlock_proto;extern const struct bpf_func_proto bpf_get_local_storage_proto;extern const struct bpf_func_proto bpf_strtol_proto;extern const struct bpf_func_proto bpf_strtoul_proto;extern const struct bpf_func_proto bpf_tcp_sock_proto;extern const struct bpf_func_proto bpf_jiffies64_proto;extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;extern const struct bpf_func_proto bpf_event_output_data_proto;extern const struct bpf_func_proto bpf_ringbuf_output_proto;extern const struct bpf_func_proto bpf_ringbuf_reserve_proto;extern const struct bpf_func_proto bpf_ringbuf_submit_proto;extern const struct bpf_func_proto bpf_ringbuf_discard_proto;extern const struct bpf_func_proto bpf_ringbuf_query_proto;extern const struct bpf_func_proto bpf_ringbuf_reserve_dynptr_proto;extern const struct bpf_func_proto bpf_ringbuf_submit_dynptr_proto;extern const struct bpf_func_proto bpf_ringbuf_discard_dynptr_proto;extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto;extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto;extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto;extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto;extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto;extern const struct bpf_func_proto bpf_skc_to_unix_sock_proto;extern const struct bpf_func_proto bpf_skc_to_mptcp_sock_proto;extern const struct bpf_func_proto bpf_copy_from_user_proto;extern const struct bpf_func_proto bpf_snprintf_btf_proto;extern const struct bpf_func_proto bpf_snprintf_proto;extern const struct bpf_func_proto bpf_per_cpu_ptr_proto;extern const struct bpf_func_proto bpf_this_cpu_ptr_proto;extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto;extern const struct bpf_func_proto bpf_sock_from_file_proto;extern const struct bpf_func_proto bpf_get_socket_ptr_cookie_proto;extern const struct bpf_func_proto bpf_task_storage_get_recur_proto;extern const struct bpf_func_proto bpf_task_storage_get_proto;extern const struct bpf_func_proto bpf_task_storage_delete_recur_proto;extern const struct bpf_func_proto bpf_task_storage_delete_proto;extern const struct bpf_func_proto bpf_for_each_map_elem_proto;extern const struct bpf_func_proto bpf_btf_find_by_name_kind_proto;extern const struct bpf_func_proto bpf_sk_setsockopt_proto;extern const struct bpf_func_proto bpf_sk_getsockopt_proto;extern const struct bpf_func_proto bpf_sk_setsockopt_nodelay_proto;extern const struct bpf_func_proto bpf_unlocked_sk_setsockopt_proto;extern const struct bpf_func_proto bpf_unlocked_sk_getsockopt_proto;extern const struct bpf_func_proto bpf_find_vma_proto;extern const struct bpf_func_proto bpf_loop_proto;extern const struct bpf_func_proto bpf_copy_from_user_task_proto;extern const struct bpf_func_proto bpf_set_retval_proto;extern const struct bpf_func_proto bpf_get_retval_proto;extern const struct bpf_func_proto bpf_user_ringbuf_drain_proto;extern const struct bpf_func_proto bpf_cgrp_storage_get_proto;extern const struct bpf_func_proto bpf_cgrp_storage_delete_proto;
const struct bpf_func_proto *tracing_prog_func_proto( enum bpf_func_id func_id, const struct bpf_prog *prog);
/* Shared helpers among cBPF and eBPF. */void bpf_user_rnd_init_once(void);u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
#if defined(CONFIG_NET)bool bpf_sock_common_is_valid_access(int off, int size, enum bpf_access_type type, struct bpf_insn_access_aux *info);bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type, struct bpf_insn_access_aux *info);u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, const struct bpf_insn *si, struct bpf_insn *insn_buf, struct bpf_prog *prog, u32 *target_size);int bpf_dynptr_from_skb_rdonly(struct __sk_buff *skb, u64 flags, struct bpf_dynptr *ptr);#elsestatic inline bool bpf_sock_common_is_valid_access(int off, int size, enum bpf_access_type type, struct bpf_insn_access_aux *info){ return false;}static inline bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type, struct bpf_insn_access_aux *info){ return false;}static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, const struct bpf_insn *si, struct bpf_insn *insn_buf, struct bpf_prog *prog, u32 *target_size){ return 0;}static inline int bpf_dynptr_from_skb_rdonly(struct __sk_buff *skb, u64 flags, struct bpf_dynptr *ptr){ return -EOPNOTSUPP;}#endif
#ifdef CONFIG_INETstruct sk_reuseport_kern { struct sk_buff *skb; struct sock *sk; struct sock *selected_sk; struct sock *migrating_sk; void *data_end; u32 hash; u32 reuseport_id; bool bind_inany;};bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type, struct bpf_insn_access_aux *info);
u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, const struct bpf_insn *si, struct bpf_insn *insn_buf, struct bpf_prog *prog, u32 *target_size);
bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type, struct bpf_insn_access_aux *info);
u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, const struct bpf_insn *si, struct bpf_insn *insn_buf, struct bpf_prog *prog, u32 *target_size);#elsestatic inline bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type, struct bpf_insn_access_aux *info){ return false;}
static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, const struct bpf_insn *si, struct bpf_insn *insn_buf, struct bpf_prog *prog, u32 *target_size){ return 0;}static inline bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type, struct bpf_insn_access_aux *info){ return false;}
static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, const struct bpf_insn *si, struct bpf_insn *insn_buf, struct bpf_prog *prog, u32 *target_size){ return 0;}#endif /* CONFIG_INET */
enum bpf_text_poke_type { BPF_MOD_NOP, BPF_MOD_CALL, BPF_MOD_JUMP,};
int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type old_t, enum bpf_text_poke_type new_t, void *old_addr, void *new_addr);
void bpf_arch_poke_desc_update(struct bpf_jit_poke_descriptor *poke, struct bpf_prog *new, struct bpf_prog *old);
void *bpf_arch_text_copy(void *dst, void *src, size_t len);int bpf_arch_text_invalidate(void *dst, size_t len);
struct btf_id_set;bool btf_id_set_contains(const struct btf_id_set *set, u32 id);
#define MAX_BPRINTF_VARARGS 12#define MAX_BPRINTF_BUF 1024
/* Per-cpu temp buffers used by printf-like helpers to store the bprintf binary * arguments representation. */#define MAX_BPRINTF_BIN_ARGS 512
struct bpf_bprintf_buffers { char bin_args[MAX_BPRINTF_BIN_ARGS]; char buf[MAX_BPRINTF_BUF];};
struct bpf_bprintf_data { u32 *bin_args; char *buf; bool get_bin_args; bool get_buf;};
int bpf_bprintf_prepare(const char *fmt, u32 fmt_size, const u64 *raw_args, u32 num_args, struct bpf_bprintf_data *data);void bpf_bprintf_cleanup(struct bpf_bprintf_data *data);int bpf_try_get_buffers(struct bpf_bprintf_buffers **bufs);void bpf_put_buffers(void);
void bpf_prog_stream_init(struct bpf_prog *prog);void bpf_prog_stream_free(struct bpf_prog *prog);int bpf_prog_stream_read(struct bpf_prog *prog, enum bpf_stream_id stream_id, void __user *buf, int len);void bpf_stream_stage_init(struct bpf_stream_stage *ss);void bpf_stream_stage_free(struct bpf_stream_stage *ss);__printf(2, 3)int bpf_stream_stage_printk(struct bpf_stream_stage *ss, const char *fmt, ...);int bpf_stream_stage_commit(struct bpf_stream_stage *ss, struct bpf_prog *prog, enum bpf_stream_id stream_id);int bpf_stream_stage_dump_stack(struct bpf_stream_stage *ss);
#define bpf_stream_printk(ss, ...) bpf_stream_stage_printk(&ss, __VA_ARGS__)#define bpf_stream_dump_stack(ss) bpf_stream_stage_dump_stack(&ss)
#define bpf_stream_stage(ss, prog, stream_id, expr) \ ({ \ bpf_stream_stage_init(&ss); \ (expr); \ bpf_stream_stage_commit(&ss, prog, stream_id); \ bpf_stream_stage_free(&ss); \ })
#ifdef CONFIG_BPF_LSMvoid bpf_cgroup_atype_get(u32 attach_btf_id, int cgroup_atype);void bpf_cgroup_atype_put(int cgroup_atype);#elsestatic inline void bpf_cgroup_atype_get(u32 attach_btf_id, int cgroup_atype) {}static inline void bpf_cgroup_atype_put(int cgroup_atype) {}#endif /* CONFIG_BPF_LSM */
static inline bool type_is_alloc(u32 type){ return type & MEM_ALLOC;}
static inline gfp_t bpf_memcg_flags(gfp_t flags){ if (memcg_bpf_enabled()) return flags | __GFP_ACCOUNT; return flags;}
static inline bool bpf_is_subprog(const struct bpf_prog *prog){ return prog->aux->func_idx != 0;}
const struct bpf_line_info *bpf_find_linfo(const struct bpf_prog *prog, u32 insn_off);void bpf_get_linfo_file_line(struct btf *btf, const struct bpf_line_info *linfo, const char **filep, const char **linep, int *nump);int bpf_prog_get_file_line(struct bpf_prog *prog, unsigned long ip, const char **filep, const char **linep, int *nump);struct bpf_prog *bpf_prog_find_from_stack(void);
int bpf_insn_array_init(struct bpf_map *map, const struct bpf_prog *prog);int bpf_insn_array_ready(struct bpf_map *map);void bpf_insn_array_release(struct bpf_map *map);void bpf_insn_array_adjust(struct bpf_map *map, u32 off, u32 len);void bpf_insn_array_adjust_after_remove(struct bpf_map *map, u32 off, u32 len);
#ifdef CONFIG_BPF_SYSCALLvoid bpf_prog_update_insn_ptrs(struct bpf_prog *prog, u32 *offsets, void *image);#elsestatic inline voidbpf_prog_update_insn_ptrs(struct bpf_prog *prog, u32 *offsets, void *image){}#endif
static inline bool bpf_map_supports_cpu_flags(enum bpf_map_type map_type){ switch (map_type) { case BPF_MAP_TYPE_PERCPU_ARRAY: case BPF_MAP_TYPE_PERCPU_HASH: case BPF_MAP_TYPE_LRU_PERCPU_HASH: case BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE: return true; default: return false; }}
static inline int bpf_map_check_op_flags(struct bpf_map *map, u64 flags, u64 allowed_flags){ u32 cpu;
if ((u32)flags & ~allowed_flags) return -EINVAL;
if ((flags & BPF_F_LOCK) && !btf_record_has_field(map->record, BPF_SPIN_LOCK)) return -EINVAL;
if (!(flags & BPF_F_CPU) && flags >> 32) return -EINVAL;
if (flags & (BPF_F_CPU | BPF_F_ALL_CPUS)) { if (!bpf_map_supports_cpu_flags(map->map_type)) return -EINVAL; if ((flags & BPF_F_CPU) && (flags & BPF_F_ALL_CPUS)) return -EINVAL;
cpu = flags >> 32; if ((flags & BPF_F_CPU) && cpu >= num_possible_cpus()) return -ERANGE; }
return 0;}
#endif /* _LINUX_BPF_H */