| /* 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 <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> |
| #include <linux/u64_stats_sync.h> |
| |
| struct bpf_verifier_env; |
| struct perf_event; |
| struct bpf_prog; |
| struct bpf_map; |
| struct sock; |
| struct seq_file; |
| struct btf; |
| 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); |
| void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key); |
| |
| /* 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); |
| int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags); |
| int (*map_pop_elem)(struct bpf_map *map, void *value); |
| int (*map_peek_elem)(struct bpf_map *map, void *value); |
| |
| /* 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 *btf, |
| const struct btf_type *key_type, |
| const struct btf_type *value_type); |
| |
| /* 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); |
| }; |
| |
| struct bpf_map_memory { |
| u32 pages; |
| struct user_struct *user; |
| }; |
| |
| 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; |
| int spin_lock_off; /* >=0 valid offset, <0 error */ |
| u32 id; |
| int numa_node; |
| u32 btf_key_type_id; |
| u32 btf_value_type_id; |
| struct btf *btf; |
| struct bpf_map_memory memory; |
| bool unpriv_array; |
| bool frozen; /* write-once */ |
| /* 48 bytes hole */ |
| |
| /* The 3rd and 4th cacheline with misc members to avoid false sharing |
| * particularly with refcounting. |
| */ |
| atomic_t refcnt ____cacheline_aligned; |
| atomic_t usercnt; |
| struct work_struct work; |
| char name[BPF_OBJ_NAME_LEN]; |
| }; |
| |
| static inline bool map_value_has_spin_lock(const struct bpf_map *map) |
| { |
| return map->spin_lock_off >= 0; |
| } |
| |
| static inline void check_and_init_map_lock(struct bpf_map *map, void *dst) |
| { |
| if (likely(!map_value_has_spin_lock(map))) |
| return; |
| *(struct bpf_spin_lock *)(dst + map->spin_lock_off) = |
| (struct bpf_spin_lock){}; |
| } |
| |
| /* copy everything but bpf_spin_lock */ |
| static inline void copy_map_value(struct bpf_map *map, void *dst, void *src) |
| { |
| if (unlikely(map_value_has_spin_lock(map))) { |
| u32 off = map->spin_lock_off; |
| |
| memcpy(dst, src, off); |
| memcpy(dst + off + sizeof(struct bpf_spin_lock), |
| src + off + sizeof(struct bpf_spin_lock), |
| map->value_size - off - sizeof(struct bpf_spin_lock)); |
| } else { |
| memcpy(dst, src, map->value_size); |
| } |
| } |
| void copy_map_value_locked(struct bpf_map *map, void *dst, void *src, |
| bool lock_src); |
| |
| 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 *btf, |
| 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 */ |
| ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */ |
| ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */ |
| |
| /* 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 */ |
| ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */ |
| ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */ |
| ARG_PTR_TO_INT, /* pointer to int */ |
| ARG_PTR_TO_LONG, /* pointer to long */ |
| ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */ |
| }; |
| |
| /* 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 */ |
| RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */ |
| RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */ |
| RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common 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; |
| u16 privilege; |
| 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; |
| }; |
| |
| /* |
| * Some functions should require privilege to call at all, even in a test |
| * run. These flags indicate why privilege is required. The core BPF |
| * code will verify that the creator of such a program has the requisite |
| * privilege. |
| * |
| * NB: This means that anyone who creates a privileged program (due to |
| * such a call or due to a privilege-requiring pointer-to-integer conversion) |
| * is responsible for restricting access to the program in an appropriate |
| * manner. |
| */ |
| #define BPF_FUNC_PRIV_READ_KERNEL_MEMORY BIT(0) |
| #define BPT_FUNC_PRIV_WRITE_GLOBAL_LOGS BIT(1) |
| |
| /* 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 */ |
| PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */ |
| PTR_TO_SOCKET, /* reg points to struct bpf_sock */ |
| PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */ |
| PTR_TO_SOCK_COMMON, /* reg points to sock_common */ |
| PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */ |
| PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */ |
| PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */ |
| PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */ |
| PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */ |
| }; |
| |
| /* 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 { |
| /* 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; |
| }; |
| |
| 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 |
| |
| struct bpf_prog_stats { |
| u64 cnt; |
| u64 nsecs; |
| struct u64_stats_sync syncp; |
| }; |
| |
| struct bpf_prog_aux { |
| atomic_t refcnt; |
| u32 used_map_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 func_idx; /* 0 for non-func prog, the index in func array for func prog */ |
| bool verifier_zext; /* Zero extensions has been inserted by verifier. */ |
| 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[MAX_BPF_CGROUP_STORAGE_TYPE]; |
| char name[BPF_OBJ_NAME_LEN]; |
| #ifdef CONFIG_SECURITY |
| void *security; |
| #endif |
| struct bpf_prog_offload *offload; |
| struct btf *btf; |
| struct bpf_func_info *func_info; |
| /* 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 bpf_prog_stats __percpu *stats; |
| 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 BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */ |
| #define MAX_TAIL_CALL_CNT 32 |
| |
| #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) |
| |
| 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); |
| } |
| |
| 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); |
| 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(&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[MAX_BPF_CGROUP_STORAGE_TYPE]; |
| }; |
| |
| 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 *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_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, |
| 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(); \ |
| _ret; \ |
| }) |
| |
| /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs |
| * so BPF programs can request cwr for TCP packets. |
| * |
| * Current cgroup skb programs can only return 0 or 1 (0 to drop the |
| * packet. This macro changes the behavior so the low order bit |
| * indicates whether the packet should be dropped (0) or not (1) |
| * and the next bit is a congestion notification bit. This could be |
| * used by TCP to call tcp_enter_cwr() |
| * |
| * Hence, new allowed return values of CGROUP EGRESS BPF programs are: |
| * 0: drop packet |
| * 1: keep packet |
| * 2: drop packet and cn |
| * 3: keep packet and cn |
| * |
| * This macro then converts it to one of the NET_XMIT or an error |
| * code that is then interpreted as drop packet (and no cn): |
| * 0: NET_XMIT_SUCCESS skb should be transmitted |
| * 1: NET_XMIT_DROP skb should be dropped and cn |
| * 2: NET_XMIT_CN skb should be transmitted and cn |
| * 3: -EPERM skb should be dropped |
| */ |
| #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \ |
| ({ \ |
| struct bpf_prog_array_item *_item; \ |
| struct bpf_prog *_prog; \ |
| struct bpf_prog_array *_array; \ |
| u32 ret; \ |
| u32 _ret = 1; \ |
| u32 _cn = 0; \ |
| preempt_disable(); \ |
| rcu_read_lock(); \ |
| _array = rcu_dereference(array); \ |
| _item = &_array->items[0]; \ |
| while ((_prog = READ_ONCE(_item->prog))) { \ |
| bpf_cgroup_storage_set(_item->cgroup_storage); \ |
| ret = func(_prog, ctx); \ |
| _ret &= (ret & 1); \ |
| _cn |= (ret & 2); \ |
| _item++; \ |
| } \ |
| rcu_read_unlock(); \ |
| preempt_enable(); \ |
| if (_ret) \ |
| _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \ |
| else \ |
| _ret = (_cn ? NET_XMIT_DROP : -EPERM); \ |
| _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, int mask); |
| struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type, |
| bool attach_drv, int mask); |
| 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_charge_memlock(struct bpf_map *map, u32 pages); |
| void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages); |
| int bpf_map_charge_init(struct bpf_map_memory *mem, size_t size); |
| void bpf_map_charge_finish(struct bpf_map_memory *mem); |
| void bpf_map_charge_move(struct bpf_map_memory *dst, |
| struct bpf_map_memory *src); |
| 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 flags); |
| |
| 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, |
| union bpf_attr __user *uattr); |
| 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 mask); |
| 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_flow_dissector(struct bpf_prog *prog, |
| const union bpf_attr *kattr, |
| union bpf_attr __user *uattr); |
| #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, int mask) |
| { |
| 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_flow_dissector(struct bpf_prog *prog, |
| const union bpf_attr *kattr, |
| union bpf_attr __user *uattr) |
| { |
| return -ENOTSUPP; |
| } |
| #endif /* CONFIG_BPF_SYSCALL */ |
| |
| static inline struct bpf_prog *bpf_prog_get_type(u32 ufd, |
| enum bpf_prog_type type, |
| int mask) |
| { |
| return bpf_prog_get_type_dev(ufd, type, false, mask); |
| } |
| |
| 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(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); |
| |
| #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_BPF_STREAM_PARSER) |
| int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, u32 which); |
| int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog); |
| #else |
| static inline int sock_map_prog_update(struct bpf_map *map, |
| struct bpf_prog *prog, u32 which) |
| { |
| return -EOPNOTSUPP; |
| } |
| |
| static inline int sock_map_get_from_fd(const union bpf_attr *attr, |
| 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_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_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_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; |
| |
| /* 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); |
| |
| #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); |
| #else |
| static 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; |
| } |
| #endif |
| |
| #ifdef CONFIG_INET |
| 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); |
| #else |
| static 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 */ |
| |
| #endif /* _LINUX_BPF_H */ |