v4.19.13 snapshot.
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
new file mode 100644
index 0000000..523481a
--- /dev/null
+++ b/include/linux/bpf.h
@@ -0,0 +1,830 @@
+/* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ */
+#ifndef _LINUX_BPF_H
+#define _LINUX_BPF_H 1
+
+#include <uapi/linux/bpf.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/wait.h>
+
+struct bpf_verifier_env;
+struct perf_event;
+struct bpf_prog;
+struct bpf_map;
+struct sock;
+struct seq_file;
+struct btf_type;
+
+/* map is generic key/value storage optionally accesible 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);
+
+ /* funcs callable from userspace and from eBPF programs */
+ void *(*map_lookup_elem)(struct bpf_map *map, void *key);
+ int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
+ int (*map_delete_elem)(struct bpf_map *map, void *key);
+
+ /* 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);
+ void (*map_fd_put_ptr)(void *ptr);
+ u32 (*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)(const struct bpf_map *map,
+ const struct btf_type *key_type,
+ const struct btf_type *value_type);
+};
+
+struct bpf_map {
+ /* The first two cachelines with read-mostly members of which some
+ * are also accessed in fast-path (e.g. ops, max_entries).
+ */
+ const struct bpf_map_ops *ops ____cacheline_aligned;
+ 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;
+ u32 map_flags;
+ u32 pages;
+ u32 id;
+ int numa_node;
+ u32 btf_key_type_id;
+ u32 btf_value_type_id;
+ struct btf *btf;
+ bool unpriv_array;
+ /* 55 bytes hole */
+
+ /* The 3rd and 4th cacheline with misc members to avoid false sharing
+ * particularly with refcounting.
+ */
+ struct user_struct *user ____cacheline_aligned;
+ atomic_t refcnt;
+ atomic_t usercnt;
+ struct work_struct work;
+ char name[BPF_OBJ_NAME_LEN];
+};
+
+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 && map->ops->map_seq_show_elem;
+}
+
+int map_check_no_btf(const struct bpf_map *map,
+ const struct btf_type *key_type,
+ const struct btf_type *value_type);
+
+extern const struct bpf_map_ops bpf_map_offload_ops;
+
+/* 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 */
+
+ /* the following constraints 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_MEM_OR_NULL, /* pointer to valid memory or NULL */
+ ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
+ * helper function must fill all bytes or clear
+ * them in error case.
+ */
+
+ 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 */
+};
+
+/* 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_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
+};
+
+/* 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;
+ enum bpf_return_type ret_type;
+ 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;
+};
+
+/* 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_VALUE_OR_NULL,/* points to map elem value or NULL */
+ 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 */
+};
+
+/* The information passed from prog-specific *_is_valid_access
+ * back to the verifier.
+ */
+struct bpf_insn_access_aux {
+ enum bpf_reg_type reg_type;
+ int ctx_field_size;
+};
+
+static inline void
+bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
+{
+ aux->ctx_field_size = size;
+}
+
+struct bpf_prog_ops {
+ int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
+ union bpf_attr __user *uattr);
+};
+
+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_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);
+};
+
+struct bpf_prog_offload_ops {
+ int (*insn_hook)(struct bpf_verifier_env *env,
+ int insn_idx, int prev_insn_idx);
+};
+
+struct bpf_prog_offload {
+ struct bpf_prog *prog;
+ struct net_device *netdev;
+ void *dev_priv;
+ struct list_head offloads;
+ bool dev_state;
+ const struct bpf_prog_offload_ops *dev_ops;
+ void *jited_image;
+ u32 jited_len;
+};
+
+struct bpf_prog_aux {
+ atomic_t refcnt;
+ u32 used_map_cnt;
+ u32 max_ctx_offset;
+ u32 stack_depth;
+ u32 id;
+ u32 func_cnt;
+ bool offload_requested;
+ struct bpf_prog **func;
+ void *jit_data; /* JIT specific data. arch dependent */
+ struct latch_tree_node ksym_tnode;
+ struct list_head ksym_lnode;
+ const struct bpf_prog_ops *ops;
+ struct bpf_map **used_maps;
+ struct bpf_prog *prog;
+ struct user_struct *user;
+ u64 load_time; /* ns since boottime */
+ struct bpf_map *cgroup_storage;
+ char name[BPF_OBJ_NAME_LEN];
+#ifdef CONFIG_SECURITY
+ void *security;
+#endif
+ struct bpf_prog_offload *offload;
+ union {
+ struct work_struct work;
+ struct rcu_head rcu;
+ };
+};
+
+struct bpf_array {
+ struct bpf_map map;
+ u32 elem_size;
+ u32 index_mask;
+ /* 'ownership' of prog_array 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 and JITed flag
+ */
+ enum bpf_prog_type owner_prog_type;
+ bool owner_jited;
+ union {
+ char value[0] __aligned(8);
+ void *ptrs[0] __aligned(8);
+ void __percpu *pptrs[0] __aligned(8);
+ };
+};
+
+#define MAX_TAIL_CALL_CNT 32
+
+struct bpf_event_entry {
+ struct perf_event *event;
+ struct file *perf_file;
+ struct file *map_file;
+ struct rcu_head rcu;
+};
+
+bool bpf_prog_array_compatible(struct bpf_array *array, 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);
+
+typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
+ unsigned long off, unsigned long len);
+
+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);
+
+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);
+
+/* an array of programs to be executed under rcu_lock.
+ *
+ * Typical usage:
+ * ret = BPF_PROG_RUN_ARRAY(&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;
+ struct bpf_cgroup_storage *cgroup_storage;
+};
+
+struct bpf_prog_array {
+ struct rcu_head rcu;
+ struct bpf_prog_array_item items[0];
+};
+
+struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
+void bpf_prog_array_free(struct bpf_prog_array __rcu *progs);
+int bpf_prog_array_length(struct bpf_prog_array __rcu *progs);
+int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu *progs,
+ __u32 __user *prog_ids, u32 cnt);
+
+void bpf_prog_array_delete_safe(struct bpf_prog_array __rcu *progs,
+ struct bpf_prog *old_prog);
+int bpf_prog_array_copy_info(struct bpf_prog_array __rcu *array,
+ u32 *prog_ids, u32 request_cnt,
+ u32 *prog_cnt);
+int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array,
+ struct bpf_prog *exclude_prog,
+ struct bpf_prog *include_prog,
+ struct bpf_prog_array **new_array);
+
+#define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
+ ({ \
+ struct bpf_prog_array_item *_item; \
+ struct bpf_prog *_prog; \
+ struct bpf_prog_array *_array; \
+ u32 _ret = 1; \
+ preempt_disable(); \
+ rcu_read_lock(); \
+ _array = rcu_dereference(array); \
+ if (unlikely(check_non_null && !_array))\
+ goto _out; \
+ _item = &_array->items[0]; \
+ while ((_prog = READ_ONCE(_item->prog))) { \
+ bpf_cgroup_storage_set(_item->cgroup_storage); \
+ _ret &= func(_prog, ctx); \
+ _item++; \
+ } \
+_out: \
+ rcu_read_unlock(); \
+ preempt_enable_no_resched(); \
+ _ret; \
+ })
+
+#define BPF_PROG_RUN_ARRAY(array, ctx, func) \
+ __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
+
+#define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
+ __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
+
+#ifdef CONFIG_BPF_SYSCALL
+DECLARE_PER_CPU(int, bpf_prog_active);
+
+extern const struct file_operations bpf_map_fops;
+extern const struct file_operations bpf_prog_fops;
+
+#define BPF_PROG_TYPE(_id, _name) \
+ 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;
+#include <linux/bpf_types.h>
+#undef BPF_PROG_TYPE
+#undef BPF_MAP_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);
+struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i);
+void bpf_prog_sub(struct bpf_prog *prog, int i);
+struct bpf_prog * __must_check 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);
+int __bpf_prog_charge(struct user_struct *user, u32 pages);
+void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
+
+void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
+void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
+
+struct bpf_map *bpf_map_get_with_uref(u32 ufd);
+struct bpf_map *__bpf_map_get(struct fd f);
+struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref);
+void bpf_map_put_with_uref(struct bpf_map *map);
+void bpf_map_put(struct bpf_map *map);
+int bpf_map_precharge_memlock(u32 pages);
+int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
+void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
+void *bpf_map_area_alloc(size_t size, int numa_node);
+void bpf_map_area_free(void *base);
+void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
+
+extern int sysctl_unprivileged_bpf_disabled;
+
+int bpf_map_new_fd(struct bpf_map *map, int flags);
+int bpf_prog_new_fd(struct bpf_prog *prog);
+
+int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
+int bpf_obj_get_user(const char __user *pathname, int flags);
+
+int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
+int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
+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_copy(struct bpf_map *map, void *key, void *value);
+
+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(void __user *uaddr, size_t expected_size,
+ size_t actual_size);
+
+/* 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--)
+ *ldst++ = *lsrc++;
+}
+
+/* verify correctness of eBPF program */
+int bpf_check(struct bpf_prog **fp, union bpf_attr *attr);
+void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
+
+/* Map specifics */
+struct xdp_buff;
+struct sk_buff;
+
+struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
+void __dev_map_insert_ctx(struct bpf_map *map, u32 index);
+void __dev_map_flush(struct bpf_map *map);
+int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
+ struct net_device *dev_rx);
+int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
+ struct bpf_prog *xdp_prog);
+
+struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
+void __cpu_map_insert_ctx(struct bpf_map *map, u32 index);
+void __cpu_map_flush(struct bpf_map *map);
+int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
+ struct net_device *dev_rx);
+
+/* 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);
+
+#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 struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog,
+ int i)
+{
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
+static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
+{
+}
+
+static inline void bpf_prog_put(struct bpf_prog *prog)
+{
+}
+
+static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog)
+{
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
+static inline struct bpf_prog *__must_check
+bpf_prog_inc_not_zero(struct bpf_prog *prog)
+{
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
+static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
+{
+ return 0;
+}
+
+static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
+{
+}
+
+static inline int bpf_obj_get_user(const char __user *pathname, int flags)
+{
+ return -EOPNOTSUPP;
+}
+
+static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
+ u32 key)
+{
+ return NULL;
+}
+
+static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index)
+{
+}
+
+static inline void __dev_map_flush(struct bpf_map *map)
+{
+}
+
+struct xdp_buff;
+struct bpf_dtab_netdev;
+
+static inline
+int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
+ struct net_device *dev_rx)
+{
+ return 0;
+}
+
+struct sk_buff;
+
+static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
+ struct sk_buff *skb,
+ struct bpf_prog *xdp_prog)
+{
+ return 0;
+}
+
+static inline
+struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
+{
+ return NULL;
+}
+
+static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index)
+{
+}
+
+static inline void __cpu_map_flush(struct bpf_map *map)
+{
+}
+
+static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
+ struct xdp_buff *xdp,
+ struct net_device *dev_rx)
+{
+ return 0;
+}
+
+static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
+ enum bpf_prog_type type)
+{
+ return ERR_PTR(-EOPNOTSUPP);
+}
+#endif /* CONFIG_BPF_SYSCALL */
+
+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);
+}
+
+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_offload_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(void);
+void bpf_offload_dev_destroy(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);
+
+#if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
+int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
+
+static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
+{
+ return aux->offload_requested;
+}
+
+static inline bool bpf_map_is_dev_bound(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);
+#else
+static inline int bpf_prog_offload_init(struct bpf_prog *prog,
+ union bpf_attr *attr)
+{
+ return -EOPNOTSUPP;
+}
+
+static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
+{
+ return false;
+}
+
+static inline bool bpf_map_is_dev_bound(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)
+{
+}
+#endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
+
+#if defined(CONFIG_STREAM_PARSER) && defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_INET)
+struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key);
+struct sock *__sock_hash_lookup_elem(struct bpf_map *map, void *key);
+int sock_map_prog(struct bpf_map *map, struct bpf_prog *prog, u32 type);
+int sockmap_get_from_fd(const union bpf_attr *attr, int type,
+ struct bpf_prog *prog);
+#else
+static inline struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key)
+{
+ return NULL;
+}
+
+static inline struct sock *__sock_hash_lookup_elem(struct bpf_map *map,
+ void *key)
+{
+ return NULL;
+}
+
+static inline int sock_map_prog(struct bpf_map *map,
+ struct bpf_prog *prog,
+ u32 type)
+{
+ return -EOPNOTSUPP;
+}
+
+static inline int sockmap_get_from_fd(const union bpf_attr *attr, int type,
+ struct bpf_prog *prog)
+{
+ return -EINVAL;
+}
+#endif
+
+#if defined(CONFIG_XDP_SOCKETS)
+struct xdp_sock;
+struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, u32 key);
+int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
+ struct xdp_sock *xs);
+void __xsk_map_flush(struct bpf_map *map);
+#else
+struct xdp_sock;
+static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
+ u32 key)
+{
+ return NULL;
+}
+
+static inline int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
+ struct xdp_sock *xs)
+{
+ return -EOPNOTSUPP;
+}
+
+static inline void __xsk_map_flush(struct bpf_map *map)
+{
+}
+#endif
+
+#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);
+#else
+static inline void bpf_sk_reuseport_detach(struct sock *sk)
+{
+}
+
+#ifdef CONFIG_BPF_SYSCALL
+static 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) */
+
+/* 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_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_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_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_local_storage_proto;
+
+/* 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);
+
+#endif /* _LINUX_BPF_H */