David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 3 | */ |
| 4 | #ifndef _LINUX_BPF_H |
| 5 | #define _LINUX_BPF_H 1 |
| 6 | |
| 7 | #include <uapi/linux/bpf.h> |
| 8 | |
| 9 | #include <linux/workqueue.h> |
| 10 | #include <linux/file.h> |
| 11 | #include <linux/percpu.h> |
| 12 | #include <linux/err.h> |
| 13 | #include <linux/rbtree_latch.h> |
| 14 | #include <linux/numa.h> |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 15 | #include <linux/mm_types.h> |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 16 | #include <linux/wait.h> |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 17 | #include <linux/u64_stats_sync.h> |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 18 | #include <linux/refcount.h> |
| 19 | #include <linux/mutex.h> |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/kallsyms.h> |
| 22 | #include <linux/capability.h> |
| 23 | #include <linux/percpu-refcount.h> |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 24 | |
| 25 | struct bpf_verifier_env; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 26 | struct bpf_verifier_log; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 27 | struct perf_event; |
| 28 | struct bpf_prog; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 29 | struct bpf_prog_aux; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 30 | struct bpf_map; |
| 31 | struct sock; |
| 32 | struct seq_file; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 33 | struct btf; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 34 | struct btf_type; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 35 | struct exception_table_entry; |
| 36 | struct seq_operations; |
| 37 | struct bpf_iter_aux_info; |
| 38 | struct bpf_local_storage; |
| 39 | struct bpf_local_storage_map; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 40 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 41 | extern struct idr btf_idr; |
| 42 | extern spinlock_t btf_idr_lock; |
| 43 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 44 | typedef int (*bpf_iter_init_seq_priv_t)(void *private_data, |
| 45 | struct bpf_iter_aux_info *aux); |
| 46 | typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data); |
| 47 | struct bpf_iter_seq_info { |
| 48 | const struct seq_operations *seq_ops; |
| 49 | bpf_iter_init_seq_priv_t init_seq_private; |
| 50 | bpf_iter_fini_seq_priv_t fini_seq_private; |
| 51 | u32 seq_priv_size; |
| 52 | }; |
| 53 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 54 | /* map is generic key/value storage optionally accesible by eBPF programs */ |
| 55 | struct bpf_map_ops { |
| 56 | /* funcs callable from userspace (via syscall) */ |
| 57 | int (*map_alloc_check)(union bpf_attr *attr); |
| 58 | struct bpf_map *(*map_alloc)(union bpf_attr *attr); |
| 59 | void (*map_release)(struct bpf_map *map, struct file *map_file); |
| 60 | void (*map_free)(struct bpf_map *map); |
| 61 | int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key); |
| 62 | void (*map_release_uref)(struct bpf_map *map); |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 63 | void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 64 | int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr, |
| 65 | union bpf_attr __user *uattr); |
| 66 | int (*map_lookup_and_delete_batch)(struct bpf_map *map, |
| 67 | const union bpf_attr *attr, |
| 68 | union bpf_attr __user *uattr); |
| 69 | int (*map_update_batch)(struct bpf_map *map, const union bpf_attr *attr, |
| 70 | union bpf_attr __user *uattr); |
| 71 | int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr, |
| 72 | union bpf_attr __user *uattr); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 73 | |
| 74 | /* funcs callable from userspace and from eBPF programs */ |
| 75 | void *(*map_lookup_elem)(struct bpf_map *map, void *key); |
| 76 | int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags); |
| 77 | int (*map_delete_elem)(struct bpf_map *map, void *key); |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 78 | int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags); |
| 79 | int (*map_pop_elem)(struct bpf_map *map, void *value); |
| 80 | int (*map_peek_elem)(struct bpf_map *map, void *value); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 81 | |
| 82 | /* funcs called by prog_array and perf_event_array map */ |
| 83 | void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file, |
| 84 | int fd); |
| 85 | void (*map_fd_put_ptr)(void *ptr); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 86 | int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 87 | u32 (*map_fd_sys_lookup_elem)(void *ptr); |
| 88 | void (*map_seq_show_elem)(struct bpf_map *map, void *key, |
| 89 | struct seq_file *m); |
| 90 | int (*map_check_btf)(const struct bpf_map *map, |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 91 | const struct btf *btf, |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 92 | const struct btf_type *key_type, |
| 93 | const struct btf_type *value_type); |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 94 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 95 | /* Prog poke tracking helpers. */ |
| 96 | int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux); |
| 97 | void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux); |
| 98 | void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old, |
| 99 | struct bpf_prog *new); |
| 100 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 101 | /* Direct value access helpers. */ |
| 102 | int (*map_direct_value_addr)(const struct bpf_map *map, |
| 103 | u64 *imm, u32 off); |
| 104 | int (*map_direct_value_meta)(const struct bpf_map *map, |
| 105 | u64 imm, u32 *off); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 106 | int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma); |
| 107 | __poll_t (*map_poll)(struct bpf_map *map, struct file *filp, |
| 108 | struct poll_table_struct *pts); |
| 109 | |
| 110 | /* Functions called by bpf_local_storage maps */ |
| 111 | int (*map_local_storage_charge)(struct bpf_local_storage_map *smap, |
| 112 | void *owner, u32 size); |
| 113 | void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap, |
| 114 | void *owner, u32 size); |
| 115 | struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner); |
| 116 | |
| 117 | /* map_meta_equal must be implemented for maps that can be |
| 118 | * used as an inner map. It is a runtime check to ensure |
| 119 | * an inner map can be inserted to an outer map. |
| 120 | * |
| 121 | * Some properties of the inner map has been used during the |
| 122 | * verification time. When inserting an inner map at the runtime, |
| 123 | * map_meta_equal has to ensure the inserting map has the same |
| 124 | * properties that the verifier has used earlier. |
| 125 | */ |
| 126 | bool (*map_meta_equal)(const struct bpf_map *meta0, |
| 127 | const struct bpf_map *meta1); |
| 128 | |
| 129 | /* BTF name and id of struct allocated by map_alloc */ |
| 130 | const char * const map_btf_name; |
| 131 | int *map_btf_id; |
| 132 | |
| 133 | /* bpf_iter info used to open a seq_file */ |
| 134 | const struct bpf_iter_seq_info *iter_seq_info; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 135 | }; |
| 136 | |
| 137 | struct bpf_map_memory { |
| 138 | u32 pages; |
| 139 | struct user_struct *user; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 140 | }; |
| 141 | |
| 142 | struct bpf_map { |
| 143 | /* The first two cachelines with read-mostly members of which some |
| 144 | * are also accessed in fast-path (e.g. ops, max_entries). |
| 145 | */ |
| 146 | const struct bpf_map_ops *ops ____cacheline_aligned; |
| 147 | struct bpf_map *inner_map_meta; |
| 148 | #ifdef CONFIG_SECURITY |
| 149 | void *security; |
| 150 | #endif |
| 151 | enum bpf_map_type map_type; |
| 152 | u32 key_size; |
| 153 | u32 value_size; |
| 154 | u32 max_entries; |
| 155 | u32 map_flags; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 156 | int spin_lock_off; /* >=0 valid offset, <0 error */ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 157 | u32 id; |
| 158 | int numa_node; |
| 159 | u32 btf_key_type_id; |
| 160 | u32 btf_value_type_id; |
| 161 | struct btf *btf; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 162 | struct bpf_map_memory memory; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 163 | char name[BPF_OBJ_NAME_LEN]; |
| 164 | u32 btf_vmlinux_value_type_id; |
| 165 | bool bypass_spec_v1; |
| 166 | bool frozen; /* write-once; write-protected by freeze_mutex */ |
| 167 | /* 22 bytes hole */ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 168 | |
| 169 | /* The 3rd and 4th cacheline with misc members to avoid false sharing |
| 170 | * particularly with refcounting. |
| 171 | */ |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 172 | atomic64_t refcnt ____cacheline_aligned; |
| 173 | atomic64_t usercnt; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 174 | struct work_struct work; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 175 | struct mutex freeze_mutex; |
| 176 | atomic64_t writecnt; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 177 | }; |
| 178 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 179 | static inline bool map_value_has_spin_lock(const struct bpf_map *map) |
| 180 | { |
| 181 | return map->spin_lock_off >= 0; |
| 182 | } |
| 183 | |
| 184 | static inline void check_and_init_map_lock(struct bpf_map *map, void *dst) |
| 185 | { |
| 186 | if (likely(!map_value_has_spin_lock(map))) |
| 187 | return; |
| 188 | *(struct bpf_spin_lock *)(dst + map->spin_lock_off) = |
| 189 | (struct bpf_spin_lock){}; |
| 190 | } |
| 191 | |
| 192 | /* copy everything but bpf_spin_lock */ |
| 193 | static inline void copy_map_value(struct bpf_map *map, void *dst, void *src) |
| 194 | { |
| 195 | if (unlikely(map_value_has_spin_lock(map))) { |
| 196 | u32 off = map->spin_lock_off; |
| 197 | |
| 198 | memcpy(dst, src, off); |
| 199 | memcpy(dst + off + sizeof(struct bpf_spin_lock), |
| 200 | src + off + sizeof(struct bpf_spin_lock), |
| 201 | map->value_size - off - sizeof(struct bpf_spin_lock)); |
| 202 | } else { |
| 203 | memcpy(dst, src, map->value_size); |
| 204 | } |
| 205 | } |
| 206 | void copy_map_value_locked(struct bpf_map *map, void *dst, void *src, |
| 207 | bool lock_src); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 208 | int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size); |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 209 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 210 | struct bpf_offload_dev; |
| 211 | struct bpf_offloaded_map; |
| 212 | |
| 213 | struct bpf_map_dev_ops { |
| 214 | int (*map_get_next_key)(struct bpf_offloaded_map *map, |
| 215 | void *key, void *next_key); |
| 216 | int (*map_lookup_elem)(struct bpf_offloaded_map *map, |
| 217 | void *key, void *value); |
| 218 | int (*map_update_elem)(struct bpf_offloaded_map *map, |
| 219 | void *key, void *value, u64 flags); |
| 220 | int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key); |
| 221 | }; |
| 222 | |
| 223 | struct bpf_offloaded_map { |
| 224 | struct bpf_map map; |
| 225 | struct net_device *netdev; |
| 226 | const struct bpf_map_dev_ops *dev_ops; |
| 227 | void *dev_priv; |
| 228 | struct list_head offloads; |
| 229 | }; |
| 230 | |
| 231 | static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map) |
| 232 | { |
| 233 | return container_of(map, struct bpf_offloaded_map, map); |
| 234 | } |
| 235 | |
| 236 | static inline bool bpf_map_offload_neutral(const struct bpf_map *map) |
| 237 | { |
| 238 | return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY; |
| 239 | } |
| 240 | |
| 241 | static inline bool bpf_map_support_seq_show(const struct bpf_map *map) |
| 242 | { |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 243 | return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) && |
| 244 | map->ops->map_seq_show_elem; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | int map_check_no_btf(const struct bpf_map *map, |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 248 | const struct btf *btf, |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 249 | const struct btf_type *key_type, |
| 250 | const struct btf_type *value_type); |
| 251 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 252 | bool bpf_map_meta_equal(const struct bpf_map *meta0, |
| 253 | const struct bpf_map *meta1); |
| 254 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 255 | extern const struct bpf_map_ops bpf_map_offload_ops; |
| 256 | |
| 257 | /* function argument constraints */ |
| 258 | enum bpf_arg_type { |
| 259 | ARG_DONTCARE = 0, /* unused argument in helper function */ |
| 260 | |
| 261 | /* the following constraints used to prototype |
| 262 | * bpf_map_lookup/update/delete_elem() functions |
| 263 | */ |
| 264 | ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */ |
| 265 | ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */ |
| 266 | ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */ |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 267 | ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */ |
| 268 | ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 269 | |
| 270 | /* the following constraints used to prototype bpf_memcmp() and other |
| 271 | * functions that access data on eBPF program stack |
| 272 | */ |
| 273 | ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */ |
| 274 | ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */ |
| 275 | ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized, |
| 276 | * helper function must fill all bytes or clear |
| 277 | * them in error case. |
| 278 | */ |
| 279 | |
| 280 | ARG_CONST_SIZE, /* number of bytes accessed from memory */ |
| 281 | ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */ |
| 282 | |
| 283 | ARG_PTR_TO_CTX, /* pointer to context */ |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 284 | ARG_PTR_TO_CTX_OR_NULL, /* pointer to context or NULL */ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 285 | ARG_ANYTHING, /* any (initialized) argument is ok */ |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 286 | ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */ |
| 287 | ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */ |
| 288 | ARG_PTR_TO_INT, /* pointer to int */ |
| 289 | ARG_PTR_TO_LONG, /* pointer to long */ |
| 290 | ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */ |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 291 | ARG_PTR_TO_SOCKET_OR_NULL, /* pointer to bpf_sock (fullsock) or NULL */ |
| 292 | ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */ |
| 293 | ARG_PTR_TO_ALLOC_MEM, /* pointer to dynamically allocated memory */ |
| 294 | ARG_PTR_TO_ALLOC_MEM_OR_NULL, /* pointer to dynamically allocated memory or NULL */ |
| 295 | ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */ |
| 296 | ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */ |
| 297 | ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */ |
| 298 | __BPF_ARG_TYPE_MAX, |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 299 | }; |
| 300 | |
| 301 | /* type of values returned from helper functions */ |
| 302 | enum bpf_return_type { |
| 303 | RET_INTEGER, /* function returns integer */ |
| 304 | RET_VOID, /* function doesn't return anything */ |
| 305 | RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */ |
| 306 | RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */ |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 307 | RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */ |
| 308 | RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */ |
| 309 | RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */ |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 310 | RET_PTR_TO_ALLOC_MEM_OR_NULL, /* returns a pointer to dynamically allocated memory or NULL */ |
| 311 | RET_PTR_TO_BTF_ID_OR_NULL, /* returns a pointer to a btf_id or NULL */ |
| 312 | RET_PTR_TO_MEM_OR_BTF_ID_OR_NULL, /* returns a pointer to a valid memory or a btf_id or NULL */ |
| 313 | RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 314 | }; |
| 315 | |
| 316 | /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs |
| 317 | * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL |
| 318 | * instructions after verifying |
| 319 | */ |
| 320 | struct bpf_func_proto { |
| 321 | u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); |
| 322 | bool gpl_only; |
| 323 | bool pkt_access; |
| 324 | enum bpf_return_type ret_type; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 325 | union { |
| 326 | struct { |
| 327 | enum bpf_arg_type arg1_type; |
| 328 | enum bpf_arg_type arg2_type; |
| 329 | enum bpf_arg_type arg3_type; |
| 330 | enum bpf_arg_type arg4_type; |
| 331 | enum bpf_arg_type arg5_type; |
| 332 | }; |
| 333 | enum bpf_arg_type arg_type[5]; |
| 334 | }; |
| 335 | union { |
| 336 | struct { |
| 337 | u32 *arg1_btf_id; |
| 338 | u32 *arg2_btf_id; |
| 339 | u32 *arg3_btf_id; |
| 340 | u32 *arg4_btf_id; |
| 341 | u32 *arg5_btf_id; |
| 342 | }; |
| 343 | u32 *arg_btf_id[5]; |
| 344 | }; |
| 345 | int *ret_btf_id; /* return value btf_id */ |
| 346 | bool (*allowed)(const struct bpf_prog *prog); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 347 | }; |
| 348 | |
| 349 | /* bpf_context is intentionally undefined structure. Pointer to bpf_context is |
| 350 | * the first argument to eBPF programs. |
| 351 | * For socket filters: 'struct bpf_context *' == 'struct sk_buff *' |
| 352 | */ |
| 353 | struct bpf_context; |
| 354 | |
| 355 | enum bpf_access_type { |
| 356 | BPF_READ = 1, |
| 357 | BPF_WRITE = 2 |
| 358 | }; |
| 359 | |
| 360 | /* types of values stored in eBPF registers */ |
| 361 | /* Pointer types represent: |
| 362 | * pointer |
| 363 | * pointer + imm |
| 364 | * pointer + (u16) var |
| 365 | * pointer + (u16) var + imm |
| 366 | * if (range > 0) then [ptr, ptr + range - off) is safe to access |
| 367 | * if (id > 0) means that some 'var' was added |
| 368 | * if (off > 0) means that 'imm' was added |
| 369 | */ |
| 370 | enum bpf_reg_type { |
| 371 | NOT_INIT = 0, /* nothing was written into register */ |
| 372 | SCALAR_VALUE, /* reg doesn't contain a valid pointer */ |
| 373 | PTR_TO_CTX, /* reg points to bpf_context */ |
| 374 | CONST_PTR_TO_MAP, /* reg points to struct bpf_map */ |
| 375 | PTR_TO_MAP_VALUE, /* reg points to map element value */ |
| 376 | PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */ |
| 377 | PTR_TO_STACK, /* reg == frame_pointer + offset */ |
| 378 | PTR_TO_PACKET_META, /* skb->data - meta_len */ |
| 379 | PTR_TO_PACKET, /* reg points to skb->data */ |
| 380 | PTR_TO_PACKET_END, /* skb->data + headlen */ |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 381 | PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */ |
| 382 | PTR_TO_SOCKET, /* reg points to struct bpf_sock */ |
| 383 | PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */ |
| 384 | PTR_TO_SOCK_COMMON, /* reg points to sock_common */ |
| 385 | PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */ |
| 386 | PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */ |
| 387 | PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */ |
| 388 | PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */ |
| 389 | PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */ |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 390 | /* PTR_TO_BTF_ID points to a kernel struct that does not need |
| 391 | * to be null checked by the BPF program. This does not imply the |
| 392 | * pointer is _not_ null and in practice this can easily be a null |
| 393 | * pointer when reading pointer chains. The assumption is program |
| 394 | * context will handle null pointer dereference typically via fault |
| 395 | * handling. The verifier must keep this in mind and can make no |
| 396 | * assumptions about null or non-null when doing branch analysis. |
| 397 | * Further, when passed into helpers the helpers can not, without |
| 398 | * additional context, assume the value is non-null. |
| 399 | */ |
| 400 | PTR_TO_BTF_ID, |
| 401 | /* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not |
| 402 | * been checked for null. Used primarily to inform the verifier |
| 403 | * an explicit null check is required for this struct. |
| 404 | */ |
| 405 | PTR_TO_BTF_ID_OR_NULL, |
| 406 | PTR_TO_MEM, /* reg points to valid memory region */ |
| 407 | PTR_TO_MEM_OR_NULL, /* reg points to valid memory region or NULL */ |
| 408 | PTR_TO_RDONLY_BUF, /* reg points to a readonly buffer */ |
| 409 | PTR_TO_RDONLY_BUF_OR_NULL, /* reg points to a readonly buffer or NULL */ |
| 410 | PTR_TO_RDWR_BUF, /* reg points to a read/write buffer */ |
| 411 | PTR_TO_RDWR_BUF_OR_NULL, /* reg points to a read/write buffer or NULL */ |
| 412 | PTR_TO_PERCPU_BTF_ID, /* reg points to a percpu kernel variable */ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 413 | }; |
| 414 | |
| 415 | /* The information passed from prog-specific *_is_valid_access |
| 416 | * back to the verifier. |
| 417 | */ |
| 418 | struct bpf_insn_access_aux { |
| 419 | enum bpf_reg_type reg_type; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 420 | union { |
| 421 | int ctx_field_size; |
| 422 | u32 btf_id; |
| 423 | }; |
| 424 | struct bpf_verifier_log *log; /* for verbose logs */ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 425 | }; |
| 426 | |
| 427 | static inline void |
| 428 | bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size) |
| 429 | { |
| 430 | aux->ctx_field_size = size; |
| 431 | } |
| 432 | |
| 433 | struct bpf_prog_ops { |
| 434 | int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr, |
| 435 | union bpf_attr __user *uattr); |
| 436 | }; |
| 437 | |
| 438 | struct bpf_verifier_ops { |
| 439 | /* return eBPF function prototype for verification */ |
| 440 | const struct bpf_func_proto * |
| 441 | (*get_func_proto)(enum bpf_func_id func_id, |
| 442 | const struct bpf_prog *prog); |
| 443 | |
| 444 | /* return true if 'size' wide access at offset 'off' within bpf_context |
| 445 | * with 'type' (read or write) is allowed |
| 446 | */ |
| 447 | bool (*is_valid_access)(int off, int size, enum bpf_access_type type, |
| 448 | const struct bpf_prog *prog, |
| 449 | struct bpf_insn_access_aux *info); |
| 450 | int (*gen_prologue)(struct bpf_insn *insn, bool direct_write, |
| 451 | const struct bpf_prog *prog); |
| 452 | int (*gen_ld_abs)(const struct bpf_insn *orig, |
| 453 | struct bpf_insn *insn_buf); |
| 454 | u32 (*convert_ctx_access)(enum bpf_access_type type, |
| 455 | const struct bpf_insn *src, |
| 456 | struct bpf_insn *dst, |
| 457 | struct bpf_prog *prog, u32 *target_size); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 458 | int (*btf_struct_access)(struct bpf_verifier_log *log, |
| 459 | const struct btf_type *t, int off, int size, |
| 460 | enum bpf_access_type atype, |
| 461 | u32 *next_btf_id); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 462 | }; |
| 463 | |
| 464 | struct bpf_prog_offload_ops { |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 465 | /* verifier basic callbacks */ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 466 | int (*insn_hook)(struct bpf_verifier_env *env, |
| 467 | int insn_idx, int prev_insn_idx); |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 468 | int (*finalize)(struct bpf_verifier_env *env); |
| 469 | /* verifier optimization callbacks (called after .finalize) */ |
| 470 | int (*replace_insn)(struct bpf_verifier_env *env, u32 off, |
| 471 | struct bpf_insn *insn); |
| 472 | int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt); |
| 473 | /* program management callbacks */ |
| 474 | int (*prepare)(struct bpf_prog *prog); |
| 475 | int (*translate)(struct bpf_prog *prog); |
| 476 | void (*destroy)(struct bpf_prog *prog); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 477 | }; |
| 478 | |
| 479 | struct bpf_prog_offload { |
| 480 | struct bpf_prog *prog; |
| 481 | struct net_device *netdev; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 482 | struct bpf_offload_dev *offdev; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 483 | void *dev_priv; |
| 484 | struct list_head offloads; |
| 485 | bool dev_state; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 486 | bool opt_failed; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 487 | void *jited_image; |
| 488 | u32 jited_len; |
| 489 | }; |
| 490 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 491 | enum bpf_cgroup_storage_type { |
| 492 | BPF_CGROUP_STORAGE_SHARED, |
| 493 | BPF_CGROUP_STORAGE_PERCPU, |
| 494 | __BPF_CGROUP_STORAGE_MAX |
| 495 | }; |
| 496 | |
| 497 | #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX |
| 498 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 499 | /* The longest tracepoint has 12 args. |
| 500 | * See include/trace/bpf_probe.h |
| 501 | */ |
| 502 | #define MAX_BPF_FUNC_ARGS 12 |
| 503 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 504 | struct bpf_prog_stats { |
| 505 | u64 cnt; |
| 506 | u64 nsecs; |
| 507 | struct u64_stats_sync syncp; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 508 | } __aligned(2 * sizeof(u64)); |
| 509 | |
| 510 | struct btf_func_model { |
| 511 | u8 ret_size; |
| 512 | u8 nr_args; |
| 513 | u8 arg_size[MAX_BPF_FUNC_ARGS]; |
| 514 | }; |
| 515 | |
| 516 | /* Restore arguments before returning from trampoline to let original function |
| 517 | * continue executing. This flag is used for fentry progs when there are no |
| 518 | * fexit progs. |
| 519 | */ |
| 520 | #define BPF_TRAMP_F_RESTORE_REGS BIT(0) |
| 521 | /* Call original function after fentry progs, but before fexit progs. |
| 522 | * Makes sense for fentry/fexit, normal calls and indirect calls. |
| 523 | */ |
| 524 | #define BPF_TRAMP_F_CALL_ORIG BIT(1) |
| 525 | /* Skip current frame and return to parent. Makes sense for fentry/fexit |
| 526 | * programs only. Should not be used with normal calls and indirect calls. |
| 527 | */ |
| 528 | #define BPF_TRAMP_F_SKIP_FRAME BIT(2) |
| 529 | /* Return the return value of fentry prog. Only used by bpf_struct_ops. */ |
| 530 | #define BPF_TRAMP_F_RET_FENTRY_RET BIT(4) |
| 531 | |
| 532 | /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50 |
| 533 | * bytes on x86. Pick a number to fit into BPF_IMAGE_SIZE / 2 |
| 534 | */ |
| 535 | #define BPF_MAX_TRAMP_PROGS 40 |
| 536 | |
| 537 | struct bpf_tramp_progs { |
| 538 | struct bpf_prog *progs[BPF_MAX_TRAMP_PROGS]; |
| 539 | int nr_progs; |
| 540 | }; |
| 541 | |
| 542 | /* Different use cases for BPF trampoline: |
| 543 | * 1. replace nop at the function entry (kprobe equivalent) |
| 544 | * flags = BPF_TRAMP_F_RESTORE_REGS |
| 545 | * fentry = a set of programs to run before returning from trampoline |
| 546 | * |
| 547 | * 2. replace nop at the function entry (kprobe + kretprobe equivalent) |
| 548 | * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME |
| 549 | * orig_call = fentry_ip + MCOUNT_INSN_SIZE |
| 550 | * fentry = a set of program to run before calling original function |
| 551 | * fexit = a set of program to run after original function |
| 552 | * |
| 553 | * 3. replace direct call instruction anywhere in the function body |
| 554 | * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid) |
| 555 | * With flags = 0 |
| 556 | * fentry = a set of programs to run before returning from trampoline |
| 557 | * With flags = BPF_TRAMP_F_CALL_ORIG |
| 558 | * orig_call = original callback addr or direct function addr |
| 559 | * fentry = a set of program to run before calling original function |
| 560 | * fexit = a set of program to run after original function |
| 561 | */ |
| 562 | struct bpf_tramp_image; |
| 563 | int arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end, |
| 564 | const struct btf_func_model *m, u32 flags, |
| 565 | struct bpf_tramp_progs *tprogs, |
| 566 | void *orig_call); |
| 567 | /* these two functions are called from generated trampoline */ |
| 568 | u64 notrace __bpf_prog_enter(void); |
| 569 | void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start); |
| 570 | void notrace __bpf_prog_enter_sleepable(void); |
| 571 | void notrace __bpf_prog_exit_sleepable(void); |
| 572 | void notrace __bpf_tramp_enter(struct bpf_tramp_image *tr); |
| 573 | void notrace __bpf_tramp_exit(struct bpf_tramp_image *tr); |
| 574 | |
| 575 | struct bpf_ksym { |
| 576 | unsigned long start; |
| 577 | unsigned long end; |
| 578 | char name[KSYM_NAME_LEN]; |
| 579 | struct list_head lnode; |
| 580 | struct latch_tree_node tnode; |
| 581 | bool prog; |
| 582 | }; |
| 583 | |
| 584 | enum bpf_tramp_prog_type { |
| 585 | BPF_TRAMP_FENTRY, |
| 586 | BPF_TRAMP_FEXIT, |
| 587 | BPF_TRAMP_MODIFY_RETURN, |
| 588 | BPF_TRAMP_MAX, |
| 589 | BPF_TRAMP_REPLACE, /* more than MAX */ |
| 590 | }; |
| 591 | |
| 592 | struct bpf_tramp_image { |
| 593 | void *image; |
| 594 | struct bpf_ksym ksym; |
| 595 | struct percpu_ref pcref; |
| 596 | void *ip_after_call; |
| 597 | void *ip_epilogue; |
| 598 | union { |
| 599 | struct rcu_head rcu; |
| 600 | struct work_struct work; |
| 601 | }; |
| 602 | }; |
| 603 | |
| 604 | struct bpf_trampoline { |
| 605 | /* hlist for trampoline_table */ |
| 606 | struct hlist_node hlist; |
| 607 | /* serializes access to fields of this trampoline */ |
| 608 | struct mutex mutex; |
| 609 | refcount_t refcnt; |
| 610 | u64 key; |
| 611 | struct { |
| 612 | struct btf_func_model model; |
| 613 | void *addr; |
| 614 | bool ftrace_managed; |
| 615 | } func; |
| 616 | /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF |
| 617 | * program by replacing one of its functions. func.addr is the address |
| 618 | * of the function it replaced. |
| 619 | */ |
| 620 | struct bpf_prog *extension_prog; |
| 621 | /* list of BPF programs using this trampoline */ |
| 622 | struct hlist_head progs_hlist[BPF_TRAMP_MAX]; |
| 623 | /* Number of attached programs. A counter per kind. */ |
| 624 | int progs_cnt[BPF_TRAMP_MAX]; |
| 625 | /* Executable image of trampoline */ |
| 626 | struct bpf_tramp_image *cur_image; |
| 627 | u64 selector; |
| 628 | }; |
| 629 | |
| 630 | struct bpf_attach_target_info { |
| 631 | struct btf_func_model fmodel; |
| 632 | long tgt_addr; |
| 633 | const char *tgt_name; |
| 634 | const struct btf_type *tgt_type; |
| 635 | }; |
| 636 | |
| 637 | #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */ |
| 638 | |
| 639 | struct bpf_dispatcher_prog { |
| 640 | struct bpf_prog *prog; |
| 641 | refcount_t users; |
| 642 | }; |
| 643 | |
| 644 | struct bpf_dispatcher { |
| 645 | /* dispatcher mutex */ |
| 646 | struct mutex mutex; |
| 647 | void *func; |
| 648 | struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX]; |
| 649 | int num_progs; |
| 650 | void *image; |
| 651 | u32 image_off; |
| 652 | struct bpf_ksym ksym; |
| 653 | }; |
| 654 | |
| 655 | static __always_inline unsigned int bpf_dispatcher_nop_func( |
| 656 | const void *ctx, |
| 657 | const struct bpf_insn *insnsi, |
| 658 | unsigned int (*bpf_func)(const void *, |
| 659 | const struct bpf_insn *)) |
| 660 | { |
| 661 | return bpf_func(ctx, insnsi); |
| 662 | } |
| 663 | #ifdef CONFIG_BPF_JIT |
| 664 | int bpf_trampoline_link_prog(struct bpf_prog *prog, struct bpf_trampoline *tr); |
| 665 | int bpf_trampoline_unlink_prog(struct bpf_prog *prog, struct bpf_trampoline *tr); |
| 666 | struct bpf_trampoline *bpf_trampoline_get(u64 key, |
| 667 | struct bpf_attach_target_info *tgt_info); |
| 668 | void bpf_trampoline_put(struct bpf_trampoline *tr); |
| 669 | int arch_prepare_bpf_dispatcher(void *image, s64 *funcs, int num_funcs); |
| 670 | #define BPF_DISPATCHER_INIT(_name) { \ |
| 671 | .mutex = __MUTEX_INITIALIZER(_name.mutex), \ |
| 672 | .func = &_name##_func, \ |
| 673 | .progs = {}, \ |
| 674 | .num_progs = 0, \ |
| 675 | .image = NULL, \ |
| 676 | .image_off = 0, \ |
| 677 | .ksym = { \ |
| 678 | .name = #_name, \ |
| 679 | .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \ |
| 680 | }, \ |
| 681 | } |
| 682 | |
| 683 | #define DEFINE_BPF_DISPATCHER(name) \ |
| 684 | noinline unsigned int bpf_dispatcher_##name##_func( \ |
| 685 | const void *ctx, \ |
| 686 | const struct bpf_insn *insnsi, \ |
| 687 | unsigned int (*bpf_func)(const void *, \ |
| 688 | const struct bpf_insn *)) \ |
| 689 | { \ |
| 690 | return bpf_func(ctx, insnsi); \ |
| 691 | } \ |
| 692 | EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \ |
| 693 | struct bpf_dispatcher bpf_dispatcher_##name = \ |
| 694 | BPF_DISPATCHER_INIT(bpf_dispatcher_##name); |
| 695 | #define DECLARE_BPF_DISPATCHER(name) \ |
| 696 | unsigned int bpf_dispatcher_##name##_func( \ |
| 697 | const void *ctx, \ |
| 698 | const struct bpf_insn *insnsi, \ |
| 699 | unsigned int (*bpf_func)(const void *, \ |
| 700 | const struct bpf_insn *)); \ |
| 701 | extern struct bpf_dispatcher bpf_dispatcher_##name; |
| 702 | #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func |
| 703 | #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name) |
| 704 | void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from, |
| 705 | struct bpf_prog *to); |
| 706 | /* Called only from JIT-enabled code, so there's no need for stubs. */ |
| 707 | void *bpf_jit_alloc_exec_page(void); |
| 708 | void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym); |
| 709 | void bpf_image_ksym_del(struct bpf_ksym *ksym); |
| 710 | void bpf_ksym_add(struct bpf_ksym *ksym); |
| 711 | void bpf_ksym_del(struct bpf_ksym *ksym); |
| 712 | int bpf_jit_charge_modmem(u32 pages); |
| 713 | void bpf_jit_uncharge_modmem(u32 pages); |
| 714 | #else |
| 715 | static inline int bpf_trampoline_link_prog(struct bpf_prog *prog, |
| 716 | struct bpf_trampoline *tr) |
| 717 | { |
| 718 | return -ENOTSUPP; |
| 719 | } |
| 720 | static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog, |
| 721 | struct bpf_trampoline *tr) |
| 722 | { |
| 723 | return -ENOTSUPP; |
| 724 | } |
| 725 | static inline struct bpf_trampoline *bpf_trampoline_get(u64 key, |
| 726 | struct bpf_attach_target_info *tgt_info) |
| 727 | { |
| 728 | return ERR_PTR(-EOPNOTSUPP); |
| 729 | } |
| 730 | static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {} |
| 731 | #define DEFINE_BPF_DISPATCHER(name) |
| 732 | #define DECLARE_BPF_DISPATCHER(name) |
| 733 | #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func |
| 734 | #define BPF_DISPATCHER_PTR(name) NULL |
| 735 | static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, |
| 736 | struct bpf_prog *from, |
| 737 | struct bpf_prog *to) {} |
| 738 | static inline bool is_bpf_image_address(unsigned long address) |
| 739 | { |
| 740 | return false; |
| 741 | } |
| 742 | #endif |
| 743 | |
| 744 | struct bpf_func_info_aux { |
| 745 | u16 linkage; |
| 746 | bool unreliable; |
| 747 | }; |
| 748 | |
| 749 | enum bpf_jit_poke_reason { |
| 750 | BPF_POKE_REASON_TAIL_CALL, |
| 751 | }; |
| 752 | |
| 753 | /* Descriptor of pokes pointing /into/ the JITed image. */ |
| 754 | struct bpf_jit_poke_descriptor { |
| 755 | void *tailcall_target; |
| 756 | void *tailcall_bypass; |
| 757 | void *bypass_addr; |
| 758 | void *aux; |
| 759 | union { |
| 760 | struct { |
| 761 | struct bpf_map *map; |
| 762 | u32 key; |
| 763 | } tail_call; |
| 764 | }; |
| 765 | bool tailcall_target_stable; |
| 766 | u8 adj_off; |
| 767 | u16 reason; |
| 768 | u32 insn_idx; |
| 769 | }; |
| 770 | |
| 771 | /* reg_type info for ctx arguments */ |
| 772 | struct bpf_ctx_arg_aux { |
| 773 | u32 offset; |
| 774 | enum bpf_reg_type reg_type; |
| 775 | u32 btf_id; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 776 | }; |
| 777 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 778 | struct bpf_prog_aux { |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 779 | atomic64_t refcnt; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 780 | u32 used_map_cnt; |
| 781 | u32 max_ctx_offset; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 782 | u32 max_pkt_offset; |
| 783 | u32 max_tp_access; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 784 | u32 stack_depth; |
| 785 | u32 id; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 786 | u32 func_cnt; /* used by non-func prog as the number of func progs */ |
| 787 | u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */ |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 788 | u32 attach_btf_id; /* in-kernel BTF type id to attach to */ |
| 789 | u32 ctx_arg_info_size; |
| 790 | u32 max_rdonly_access; |
| 791 | u32 max_rdwr_access; |
| 792 | const struct bpf_ctx_arg_aux *ctx_arg_info; |
| 793 | struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */ |
| 794 | struct bpf_prog *dst_prog; |
| 795 | struct bpf_trampoline *dst_trampoline; |
| 796 | enum bpf_prog_type saved_dst_prog_type; |
| 797 | enum bpf_attach_type saved_dst_attach_type; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 798 | bool verifier_zext; /* Zero extensions has been inserted by verifier. */ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 799 | bool offload_requested; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 800 | bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */ |
| 801 | bool func_proto_unreliable; |
| 802 | bool sleepable; |
| 803 | bool tail_call_reachable; |
| 804 | struct hlist_node tramp_hlist; |
| 805 | /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */ |
| 806 | const struct btf_type *attach_func_proto; |
| 807 | /* function name for valid attach_btf_id */ |
| 808 | const char *attach_func_name; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 809 | struct bpf_prog **func; |
| 810 | void *jit_data; /* JIT specific data. arch dependent */ |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 811 | struct bpf_jit_poke_descriptor *poke_tab; |
| 812 | u32 size_poke_tab; |
| 813 | struct bpf_ksym ksym; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 814 | const struct bpf_prog_ops *ops; |
| 815 | struct bpf_map **used_maps; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 816 | struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 817 | struct bpf_prog *prog; |
| 818 | struct user_struct *user; |
| 819 | u64 load_time; /* ns since boottime */ |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 820 | struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 821 | char name[BPF_OBJ_NAME_LEN]; |
| 822 | #ifdef CONFIG_SECURITY |
| 823 | void *security; |
| 824 | #endif |
| 825 | struct bpf_prog_offload *offload; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 826 | struct btf *btf; |
| 827 | struct bpf_func_info *func_info; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 828 | struct bpf_func_info_aux *func_info_aux; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 829 | /* bpf_line_info loaded from userspace. linfo->insn_off |
| 830 | * has the xlated insn offset. |
| 831 | * Both the main and sub prog share the same linfo. |
| 832 | * The subprog can access its first linfo by |
| 833 | * using the linfo_idx. |
| 834 | */ |
| 835 | struct bpf_line_info *linfo; |
| 836 | /* jited_linfo is the jited addr of the linfo. It has a |
| 837 | * one to one mapping to linfo: |
| 838 | * jited_linfo[i] is the jited addr for the linfo[i]->insn_off. |
| 839 | * Both the main and sub prog share the same jited_linfo. |
| 840 | * The subprog can access its first jited_linfo by |
| 841 | * using the linfo_idx. |
| 842 | */ |
| 843 | void **jited_linfo; |
| 844 | u32 func_info_cnt; |
| 845 | u32 nr_linfo; |
| 846 | /* subprog can use linfo_idx to access its first linfo and |
| 847 | * jited_linfo. |
| 848 | * main prog always has linfo_idx == 0 |
| 849 | */ |
| 850 | u32 linfo_idx; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 851 | u32 num_exentries; |
| 852 | struct exception_table_entry *extable; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 853 | struct bpf_prog_stats __percpu *stats; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 854 | union { |
| 855 | struct work_struct work; |
| 856 | struct rcu_head rcu; |
| 857 | }; |
| 858 | }; |
| 859 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 860 | struct bpf_array_aux { |
| 861 | /* 'Ownership' of prog array is claimed by the first program that |
| 862 | * is going to use this map or by the first program which FD is |
| 863 | * stored in the map to make sure that all callers and callees have |
| 864 | * the same prog type and JITed flag. |
| 865 | */ |
| 866 | struct { |
| 867 | spinlock_t lock; |
| 868 | enum bpf_prog_type type; |
| 869 | bool jited; |
| 870 | } owner; |
| 871 | /* Programs with direct jumps into programs part of this array. */ |
| 872 | struct list_head poke_progs; |
| 873 | struct bpf_map *map; |
| 874 | struct mutex poke_mutex; |
| 875 | struct work_struct work; |
| 876 | }; |
| 877 | |
| 878 | struct bpf_link { |
| 879 | atomic64_t refcnt; |
| 880 | u32 id; |
| 881 | enum bpf_link_type type; |
| 882 | const struct bpf_link_ops *ops; |
| 883 | struct bpf_prog *prog; |
| 884 | struct work_struct work; |
| 885 | }; |
| 886 | |
| 887 | struct bpf_link_ops { |
| 888 | void (*release)(struct bpf_link *link); |
| 889 | void (*dealloc)(struct bpf_link *link); |
| 890 | int (*detach)(struct bpf_link *link); |
| 891 | int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog, |
| 892 | struct bpf_prog *old_prog); |
| 893 | void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq); |
| 894 | int (*fill_link_info)(const struct bpf_link *link, |
| 895 | struct bpf_link_info *info); |
| 896 | }; |
| 897 | |
| 898 | struct bpf_link_primer { |
| 899 | struct bpf_link *link; |
| 900 | struct file *file; |
| 901 | int fd; |
| 902 | u32 id; |
| 903 | }; |
| 904 | |
| 905 | struct bpf_struct_ops_value; |
| 906 | struct btf_type; |
| 907 | struct btf_member; |
| 908 | |
| 909 | #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64 |
| 910 | struct bpf_struct_ops { |
| 911 | const struct bpf_verifier_ops *verifier_ops; |
| 912 | int (*init)(struct btf *btf); |
| 913 | int (*check_member)(const struct btf_type *t, |
| 914 | const struct btf_member *member); |
| 915 | int (*init_member)(const struct btf_type *t, |
| 916 | const struct btf_member *member, |
| 917 | void *kdata, const void *udata); |
| 918 | int (*reg)(void *kdata); |
| 919 | void (*unreg)(void *kdata); |
| 920 | const struct btf_type *type; |
| 921 | const struct btf_type *value_type; |
| 922 | const char *name; |
| 923 | struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS]; |
| 924 | u32 type_id; |
| 925 | u32 value_id; |
| 926 | }; |
| 927 | |
| 928 | #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL) |
| 929 | #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA)) |
| 930 | const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id); |
| 931 | void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log); |
| 932 | bool bpf_struct_ops_get(const void *kdata); |
| 933 | void bpf_struct_ops_put(const void *kdata); |
| 934 | int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key, |
| 935 | void *value); |
| 936 | static inline bool bpf_try_module_get(const void *data, struct module *owner) |
| 937 | { |
| 938 | if (owner == BPF_MODULE_OWNER) |
| 939 | return bpf_struct_ops_get(data); |
| 940 | else |
| 941 | return try_module_get(owner); |
| 942 | } |
| 943 | static inline void bpf_module_put(const void *data, struct module *owner) |
| 944 | { |
| 945 | if (owner == BPF_MODULE_OWNER) |
| 946 | bpf_struct_ops_put(data); |
| 947 | else |
| 948 | module_put(owner); |
| 949 | } |
| 950 | #else |
| 951 | static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id) |
| 952 | { |
| 953 | return NULL; |
| 954 | } |
| 955 | static inline void bpf_struct_ops_init(struct btf *btf, |
| 956 | struct bpf_verifier_log *log) |
| 957 | { |
| 958 | } |
| 959 | static inline bool bpf_try_module_get(const void *data, struct module *owner) |
| 960 | { |
| 961 | return try_module_get(owner); |
| 962 | } |
| 963 | static inline void bpf_module_put(const void *data, struct module *owner) |
| 964 | { |
| 965 | module_put(owner); |
| 966 | } |
| 967 | static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, |
| 968 | void *key, |
| 969 | void *value) |
| 970 | { |
| 971 | return -EINVAL; |
| 972 | } |
| 973 | #endif |
| 974 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 975 | struct bpf_array { |
| 976 | struct bpf_map map; |
| 977 | u32 elem_size; |
| 978 | u32 index_mask; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 979 | struct bpf_array_aux *aux; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 980 | union { |
| 981 | char value[0] __aligned(8); |
| 982 | void *ptrs[0] __aligned(8); |
| 983 | void __percpu *pptrs[0] __aligned(8); |
| 984 | }; |
| 985 | }; |
| 986 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 987 | #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 988 | #define MAX_TAIL_CALL_CNT 32 |
| 989 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 990 | #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \ |
| 991 | BPF_F_RDONLY_PROG | \ |
| 992 | BPF_F_WRONLY | \ |
| 993 | BPF_F_WRONLY_PROG) |
| 994 | |
| 995 | #define BPF_MAP_CAN_READ BIT(0) |
| 996 | #define BPF_MAP_CAN_WRITE BIT(1) |
| 997 | |
| 998 | static inline u32 bpf_map_flags_to_cap(struct bpf_map *map) |
| 999 | { |
| 1000 | u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG); |
| 1001 | |
| 1002 | /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is |
| 1003 | * not possible. |
| 1004 | */ |
| 1005 | if (access_flags & BPF_F_RDONLY_PROG) |
| 1006 | return BPF_MAP_CAN_READ; |
| 1007 | else if (access_flags & BPF_F_WRONLY_PROG) |
| 1008 | return BPF_MAP_CAN_WRITE; |
| 1009 | else |
| 1010 | return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE; |
| 1011 | } |
| 1012 | |
| 1013 | static inline bool bpf_map_flags_access_ok(u32 access_flags) |
| 1014 | { |
| 1015 | return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) != |
| 1016 | (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG); |
| 1017 | } |
| 1018 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1019 | struct bpf_event_entry { |
| 1020 | struct perf_event *event; |
| 1021 | struct file *perf_file; |
| 1022 | struct file *map_file; |
| 1023 | struct rcu_head rcu; |
| 1024 | }; |
| 1025 | |
| 1026 | bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp); |
| 1027 | int bpf_prog_calc_tag(struct bpf_prog *fp); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1028 | const char *kernel_type_name(u32 btf_type_id); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1029 | |
| 1030 | const struct bpf_func_proto *bpf_get_trace_printk_proto(void); |
| 1031 | |
| 1032 | typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src, |
| 1033 | unsigned long off, unsigned long len); |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1034 | typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type, |
| 1035 | const struct bpf_insn *src, |
| 1036 | struct bpf_insn *dst, |
| 1037 | struct bpf_prog *prog, |
| 1038 | u32 *target_size); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1039 | |
| 1040 | u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size, |
| 1041 | void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy); |
| 1042 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1043 | /* an array of programs to be executed under rcu_lock. |
| 1044 | * |
| 1045 | * Typical usage: |
| 1046 | * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN); |
| 1047 | * |
| 1048 | * the structure returned by bpf_prog_array_alloc() should be populated |
| 1049 | * with program pointers and the last pointer must be NULL. |
| 1050 | * The user has to keep refcnt on the program and make sure the program |
| 1051 | * is removed from the array before bpf_prog_put(). |
| 1052 | * The 'struct bpf_prog_array *' should only be replaced with xchg() |
| 1053 | * since other cpus are walking the array of pointers in parallel. |
| 1054 | */ |
| 1055 | struct bpf_prog_array_item { |
| 1056 | struct bpf_prog *prog; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1057 | struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1058 | }; |
| 1059 | |
| 1060 | struct bpf_prog_array { |
| 1061 | struct rcu_head rcu; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1062 | struct bpf_prog_array_item items[]; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1063 | }; |
| 1064 | |
| 1065 | struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags); |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1066 | void bpf_prog_array_free(struct bpf_prog_array *progs); |
| 1067 | int bpf_prog_array_length(struct bpf_prog_array *progs); |
| 1068 | bool bpf_prog_array_is_empty(struct bpf_prog_array *array); |
| 1069 | int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs, |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1070 | __u32 __user *prog_ids, u32 cnt); |
| 1071 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1072 | void bpf_prog_array_delete_safe(struct bpf_prog_array *progs, |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1073 | struct bpf_prog *old_prog); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1074 | int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index); |
| 1075 | int bpf_prog_array_update_at(struct bpf_prog_array *array, int index, |
| 1076 | struct bpf_prog *prog); |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1077 | int bpf_prog_array_copy_info(struct bpf_prog_array *array, |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1078 | u32 *prog_ids, u32 request_cnt, |
| 1079 | u32 *prog_cnt); |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1080 | int bpf_prog_array_copy(struct bpf_prog_array *old_array, |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1081 | struct bpf_prog *exclude_prog, |
| 1082 | struct bpf_prog *include_prog, |
| 1083 | struct bpf_prog_array **new_array); |
| 1084 | |
Olivier Deprez | 0e64123 | 2021-09-23 10:07:05 +0200 | [diff] [blame] | 1085 | #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null, set_cg_storage) \ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1086 | ({ \ |
| 1087 | struct bpf_prog_array_item *_item; \ |
| 1088 | struct bpf_prog *_prog; \ |
| 1089 | struct bpf_prog_array *_array; \ |
| 1090 | u32 _ret = 1; \ |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1091 | migrate_disable(); \ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1092 | rcu_read_lock(); \ |
| 1093 | _array = rcu_dereference(array); \ |
| 1094 | if (unlikely(check_non_null && !_array))\ |
| 1095 | goto _out; \ |
| 1096 | _item = &_array->items[0]; \ |
| 1097 | while ((_prog = READ_ONCE(_item->prog))) { \ |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1098 | if (!set_cg_storage) { \ |
| 1099 | _ret &= func(_prog, ctx); \ |
| 1100 | } else { \ |
| 1101 | if (unlikely(bpf_cgroup_storage_set(_item->cgroup_storage))) \ |
| 1102 | break; \ |
| 1103 | _ret &= func(_prog, ctx); \ |
| 1104 | bpf_cgroup_storage_unset(); \ |
| 1105 | } \ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1106 | _item++; \ |
| 1107 | } \ |
| 1108 | _out: \ |
| 1109 | rcu_read_unlock(); \ |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1110 | migrate_enable(); \ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1111 | _ret; \ |
| 1112 | }) |
| 1113 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1114 | /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs |
| 1115 | * so BPF programs can request cwr for TCP packets. |
| 1116 | * |
| 1117 | * Current cgroup skb programs can only return 0 or 1 (0 to drop the |
| 1118 | * packet. This macro changes the behavior so the low order bit |
| 1119 | * indicates whether the packet should be dropped (0) or not (1) |
| 1120 | * and the next bit is a congestion notification bit. This could be |
| 1121 | * used by TCP to call tcp_enter_cwr() |
| 1122 | * |
| 1123 | * Hence, new allowed return values of CGROUP EGRESS BPF programs are: |
| 1124 | * 0: drop packet |
| 1125 | * 1: keep packet |
| 1126 | * 2: drop packet and cn |
| 1127 | * 3: keep packet and cn |
| 1128 | * |
| 1129 | * This macro then converts it to one of the NET_XMIT or an error |
| 1130 | * code that is then interpreted as drop packet (and no cn): |
| 1131 | * 0: NET_XMIT_SUCCESS skb should be transmitted |
| 1132 | * 1: NET_XMIT_DROP skb should be dropped and cn |
| 1133 | * 2: NET_XMIT_CN skb should be transmitted and cn |
| 1134 | * 3: -EPERM skb should be dropped |
| 1135 | */ |
| 1136 | #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \ |
| 1137 | ({ \ |
| 1138 | struct bpf_prog_array_item *_item; \ |
| 1139 | struct bpf_prog *_prog; \ |
| 1140 | struct bpf_prog_array *_array; \ |
| 1141 | u32 ret; \ |
| 1142 | u32 _ret = 1; \ |
| 1143 | u32 _cn = 0; \ |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1144 | migrate_disable(); \ |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1145 | rcu_read_lock(); \ |
| 1146 | _array = rcu_dereference(array); \ |
| 1147 | _item = &_array->items[0]; \ |
| 1148 | while ((_prog = READ_ONCE(_item->prog))) { \ |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1149 | if (unlikely(bpf_cgroup_storage_set(_item->cgroup_storage))) \ |
| 1150 | break; \ |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1151 | ret = func(_prog, ctx); \ |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1152 | bpf_cgroup_storage_unset(); \ |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1153 | _ret &= (ret & 1); \ |
| 1154 | _cn |= (ret & 2); \ |
| 1155 | _item++; \ |
| 1156 | } \ |
| 1157 | rcu_read_unlock(); \ |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1158 | migrate_enable(); \ |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1159 | if (_ret) \ |
| 1160 | _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \ |
| 1161 | else \ |
| 1162 | _ret = (_cn ? NET_XMIT_DROP : -EPERM); \ |
| 1163 | _ret; \ |
| 1164 | }) |
| 1165 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1166 | #define BPF_PROG_RUN_ARRAY(array, ctx, func) \ |
Olivier Deprez | 0e64123 | 2021-09-23 10:07:05 +0200 | [diff] [blame] | 1167 | __BPF_PROG_RUN_ARRAY(array, ctx, func, false, true) |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1168 | |
| 1169 | #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \ |
Olivier Deprez | 0e64123 | 2021-09-23 10:07:05 +0200 | [diff] [blame] | 1170 | __BPF_PROG_RUN_ARRAY(array, ctx, func, true, false) |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1171 | |
| 1172 | #ifdef CONFIG_BPF_SYSCALL |
| 1173 | DECLARE_PER_CPU(int, bpf_prog_active); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1174 | extern struct mutex bpf_stats_enabled_mutex; |
| 1175 | |
| 1176 | /* |
| 1177 | * Block execution of BPF programs attached to instrumentation (perf, |
| 1178 | * kprobes, tracepoints) to prevent deadlocks on map operations as any of |
| 1179 | * these events can happen inside a region which holds a map bucket lock |
| 1180 | * and can deadlock on it. |
| 1181 | * |
| 1182 | * Use the preemption safe inc/dec variants on RT because migrate disable |
| 1183 | * is preemptible on RT and preemption in the middle of the RMW operation |
| 1184 | * might lead to inconsistent state. Use the raw variants for non RT |
| 1185 | * kernels as migrate_disable() maps to preempt_disable() so the slightly |
| 1186 | * more expensive save operation can be avoided. |
| 1187 | */ |
| 1188 | static inline void bpf_disable_instrumentation(void) |
| 1189 | { |
| 1190 | migrate_disable(); |
| 1191 | if (IS_ENABLED(CONFIG_PREEMPT_RT)) |
| 1192 | this_cpu_inc(bpf_prog_active); |
| 1193 | else |
| 1194 | __this_cpu_inc(bpf_prog_active); |
| 1195 | } |
| 1196 | |
| 1197 | static inline void bpf_enable_instrumentation(void) |
| 1198 | { |
| 1199 | if (IS_ENABLED(CONFIG_PREEMPT_RT)) |
| 1200 | this_cpu_dec(bpf_prog_active); |
| 1201 | else |
| 1202 | __this_cpu_dec(bpf_prog_active); |
| 1203 | migrate_enable(); |
| 1204 | } |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1205 | |
| 1206 | extern const struct file_operations bpf_map_fops; |
| 1207 | extern const struct file_operations bpf_prog_fops; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1208 | extern const struct file_operations bpf_iter_fops; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1209 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1210 | #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1211 | extern const struct bpf_prog_ops _name ## _prog_ops; \ |
| 1212 | extern const struct bpf_verifier_ops _name ## _verifier_ops; |
| 1213 | #define BPF_MAP_TYPE(_id, _ops) \ |
| 1214 | extern const struct bpf_map_ops _ops; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1215 | #define BPF_LINK_TYPE(_id, _name) |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1216 | #include <linux/bpf_types.h> |
| 1217 | #undef BPF_PROG_TYPE |
| 1218 | #undef BPF_MAP_TYPE |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1219 | #undef BPF_LINK_TYPE |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1220 | |
| 1221 | extern const struct bpf_prog_ops bpf_offload_prog_ops; |
| 1222 | extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops; |
| 1223 | extern const struct bpf_verifier_ops xdp_analyzer_ops; |
| 1224 | |
| 1225 | struct bpf_prog *bpf_prog_get(u32 ufd); |
| 1226 | struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type, |
| 1227 | bool attach_drv); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1228 | void bpf_prog_add(struct bpf_prog *prog, int i); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1229 | void bpf_prog_sub(struct bpf_prog *prog, int i); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1230 | void bpf_prog_inc(struct bpf_prog *prog); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1231 | struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog); |
| 1232 | void bpf_prog_put(struct bpf_prog *prog); |
| 1233 | int __bpf_prog_charge(struct user_struct *user, u32 pages); |
| 1234 | void __bpf_prog_uncharge(struct user_struct *user, u32 pages); |
| 1235 | |
| 1236 | void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock); |
| 1237 | void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock); |
| 1238 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1239 | struct bpf_map *bpf_map_get(u32 ufd); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1240 | struct bpf_map *bpf_map_get_with_uref(u32 ufd); |
| 1241 | struct bpf_map *__bpf_map_get(struct fd f); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1242 | void bpf_map_inc(struct bpf_map *map); |
| 1243 | void bpf_map_inc_with_uref(struct bpf_map *map); |
| 1244 | struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1245 | void bpf_map_put_with_uref(struct bpf_map *map); |
| 1246 | void bpf_map_put(struct bpf_map *map); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1247 | int bpf_map_charge_memlock(struct bpf_map *map, u32 pages); |
| 1248 | void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages); |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1249 | int bpf_map_charge_init(struct bpf_map_memory *mem, u64 size); |
| 1250 | void bpf_map_charge_finish(struct bpf_map_memory *mem); |
| 1251 | void bpf_map_charge_move(struct bpf_map_memory *dst, |
| 1252 | struct bpf_map_memory *src); |
| 1253 | void *bpf_map_area_alloc(u64 size, int numa_node); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1254 | void *bpf_map_area_mmapable_alloc(u64 size, int numa_node); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1255 | void bpf_map_area_free(void *base); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1256 | bool bpf_map_write_active(const struct bpf_map *map); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1257 | void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1258 | int generic_map_lookup_batch(struct bpf_map *map, |
| 1259 | const union bpf_attr *attr, |
| 1260 | union bpf_attr __user *uattr); |
| 1261 | int generic_map_update_batch(struct bpf_map *map, |
| 1262 | const union bpf_attr *attr, |
| 1263 | union bpf_attr __user *uattr); |
| 1264 | int generic_map_delete_batch(struct bpf_map *map, |
| 1265 | const union bpf_attr *attr, |
| 1266 | union bpf_attr __user *uattr); |
| 1267 | struct bpf_map *bpf_map_get_curr_or_next(u32 *id); |
| 1268 | struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1269 | |
| 1270 | extern int sysctl_unprivileged_bpf_disabled; |
| 1271 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1272 | static inline bool bpf_allow_ptr_leaks(void) |
| 1273 | { |
| 1274 | return perfmon_capable(); |
| 1275 | } |
| 1276 | |
| 1277 | static inline bool bpf_allow_uninit_stack(void) |
| 1278 | { |
| 1279 | return perfmon_capable(); |
| 1280 | } |
| 1281 | |
| 1282 | static inline bool bpf_allow_ptr_to_map_access(void) |
| 1283 | { |
| 1284 | return perfmon_capable(); |
| 1285 | } |
| 1286 | |
| 1287 | static inline bool bpf_bypass_spec_v1(void) |
| 1288 | { |
| 1289 | return perfmon_capable(); |
| 1290 | } |
| 1291 | |
| 1292 | static inline bool bpf_bypass_spec_v4(void) |
| 1293 | { |
| 1294 | return perfmon_capable(); |
| 1295 | } |
| 1296 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1297 | int bpf_map_new_fd(struct bpf_map *map, int flags); |
| 1298 | int bpf_prog_new_fd(struct bpf_prog *prog); |
| 1299 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1300 | void bpf_link_init(struct bpf_link *link, enum bpf_link_type type, |
| 1301 | const struct bpf_link_ops *ops, struct bpf_prog *prog); |
| 1302 | int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer); |
| 1303 | int bpf_link_settle(struct bpf_link_primer *primer); |
| 1304 | void bpf_link_cleanup(struct bpf_link_primer *primer); |
| 1305 | void bpf_link_inc(struct bpf_link *link); |
| 1306 | void bpf_link_put(struct bpf_link *link); |
| 1307 | int bpf_link_new_fd(struct bpf_link *link); |
| 1308 | struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd); |
| 1309 | struct bpf_link *bpf_link_get_from_fd(u32 ufd); |
| 1310 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1311 | int bpf_obj_pin_user(u32 ufd, const char __user *pathname); |
| 1312 | int bpf_obj_get_user(const char __user *pathname, int flags); |
| 1313 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1314 | #define BPF_ITER_FUNC_PREFIX "bpf_iter_" |
| 1315 | #define DEFINE_BPF_ITER_FUNC(target, args...) \ |
| 1316 | extern int bpf_iter_ ## target(args); \ |
| 1317 | int __init bpf_iter_ ## target(args) { return 0; } |
| 1318 | |
| 1319 | struct bpf_iter_aux_info { |
| 1320 | struct bpf_map *map; |
| 1321 | }; |
| 1322 | |
| 1323 | typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog, |
| 1324 | union bpf_iter_link_info *linfo, |
| 1325 | struct bpf_iter_aux_info *aux); |
| 1326 | typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux); |
| 1327 | typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux, |
| 1328 | struct seq_file *seq); |
| 1329 | typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux, |
| 1330 | struct bpf_link_info *info); |
| 1331 | |
| 1332 | #define BPF_ITER_CTX_ARG_MAX 2 |
| 1333 | struct bpf_iter_reg { |
| 1334 | const char *target; |
| 1335 | bpf_iter_attach_target_t attach_target; |
| 1336 | bpf_iter_detach_target_t detach_target; |
| 1337 | bpf_iter_show_fdinfo_t show_fdinfo; |
| 1338 | bpf_iter_fill_link_info_t fill_link_info; |
| 1339 | u32 ctx_arg_info_size; |
| 1340 | struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX]; |
| 1341 | const struct bpf_iter_seq_info *seq_info; |
| 1342 | }; |
| 1343 | |
| 1344 | struct bpf_iter_meta { |
| 1345 | __bpf_md_ptr(struct seq_file *, seq); |
| 1346 | u64 session_id; |
| 1347 | u64 seq_num; |
| 1348 | }; |
| 1349 | |
| 1350 | struct bpf_iter__bpf_map_elem { |
| 1351 | __bpf_md_ptr(struct bpf_iter_meta *, meta); |
| 1352 | __bpf_md_ptr(struct bpf_map *, map); |
| 1353 | __bpf_md_ptr(void *, key); |
| 1354 | __bpf_md_ptr(void *, value); |
| 1355 | }; |
| 1356 | |
| 1357 | int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info); |
| 1358 | void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info); |
| 1359 | bool bpf_iter_prog_supported(struct bpf_prog *prog); |
| 1360 | int bpf_iter_link_attach(const union bpf_attr *attr, struct bpf_prog *prog); |
| 1361 | int bpf_iter_new_fd(struct bpf_link *link); |
| 1362 | bool bpf_link_is_iter(struct bpf_link *link); |
| 1363 | struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop); |
| 1364 | int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx); |
| 1365 | void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux, |
| 1366 | struct seq_file *seq); |
| 1367 | int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux, |
| 1368 | struct bpf_link_info *info); |
| 1369 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1370 | int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value); |
| 1371 | int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value); |
| 1372 | int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value, |
| 1373 | u64 flags); |
| 1374 | int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value, |
| 1375 | u64 flags); |
| 1376 | |
| 1377 | int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value); |
| 1378 | |
| 1379 | int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file, |
| 1380 | void *key, void *value, u64 map_flags); |
| 1381 | int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
| 1382 | int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file, |
| 1383 | void *key, void *value, u64 map_flags); |
| 1384 | int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
| 1385 | |
| 1386 | int bpf_get_file_flag(int flags); |
| 1387 | int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size, |
| 1388 | size_t actual_size); |
| 1389 | |
| 1390 | /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and |
| 1391 | * forced to use 'long' read/writes to try to atomically copy long counters. |
| 1392 | * Best-effort only. No barriers here, since it _will_ race with concurrent |
| 1393 | * updates from BPF programs. Called from bpf syscall and mostly used with |
| 1394 | * size 8 or 16 bytes, so ask compiler to inline it. |
| 1395 | */ |
| 1396 | static inline void bpf_long_memcpy(void *dst, const void *src, u32 size) |
| 1397 | { |
| 1398 | const long *lsrc = src; |
| 1399 | long *ldst = dst; |
| 1400 | |
| 1401 | size /= sizeof(long); |
| 1402 | while (size--) |
| 1403 | *ldst++ = *lsrc++; |
| 1404 | } |
| 1405 | |
| 1406 | /* verify correctness of eBPF program */ |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1407 | int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, |
| 1408 | union bpf_attr __user *uattr); |
Olivier Deprez | 0e64123 | 2021-09-23 10:07:05 +0200 | [diff] [blame] | 1409 | |
| 1410 | #ifndef CONFIG_BPF_JIT_ALWAYS_ON |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1411 | void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth); |
Olivier Deprez | 0e64123 | 2021-09-23 10:07:05 +0200 | [diff] [blame] | 1412 | #endif |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1413 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1414 | struct btf *bpf_get_btf_vmlinux(void); |
| 1415 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1416 | /* Map specifics */ |
| 1417 | struct xdp_buff; |
| 1418 | struct sk_buff; |
| 1419 | |
| 1420 | struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key); |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1421 | struct bpf_dtab_netdev *__dev_map_hash_lookup_elem(struct bpf_map *map, u32 key); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1422 | void __dev_flush(void); |
| 1423 | int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp, |
| 1424 | struct net_device *dev_rx); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1425 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp, |
| 1426 | struct net_device *dev_rx); |
| 1427 | int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb, |
| 1428 | struct bpf_prog *xdp_prog); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1429 | bool dev_map_can_have_prog(struct bpf_map *map); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1430 | |
| 1431 | struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1432 | void __cpu_map_flush(void); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1433 | int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp, |
| 1434 | struct net_device *dev_rx); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1435 | bool cpu_map_prog_allowed(struct bpf_map *map); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1436 | |
| 1437 | /* Return map's numa specified by userspace */ |
| 1438 | static inline int bpf_map_attr_numa_node(const union bpf_attr *attr) |
| 1439 | { |
| 1440 | return (attr->map_flags & BPF_F_NUMA_NODE) ? |
| 1441 | attr->numa_node : NUMA_NO_NODE; |
| 1442 | } |
| 1443 | |
| 1444 | struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type); |
| 1445 | int array_map_alloc_check(union bpf_attr *attr); |
| 1446 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1447 | int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr, |
| 1448 | union bpf_attr __user *uattr); |
| 1449 | int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, |
| 1450 | union bpf_attr __user *uattr); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1451 | int bpf_prog_test_run_tracing(struct bpf_prog *prog, |
| 1452 | const union bpf_attr *kattr, |
| 1453 | union bpf_attr __user *uattr); |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1454 | int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, |
| 1455 | const union bpf_attr *kattr, |
| 1456 | union bpf_attr __user *uattr); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1457 | int bpf_prog_test_run_raw_tp(struct bpf_prog *prog, |
| 1458 | const union bpf_attr *kattr, |
| 1459 | union bpf_attr __user *uattr); |
| 1460 | bool btf_ctx_access(int off, int size, enum bpf_access_type type, |
| 1461 | const struct bpf_prog *prog, |
| 1462 | struct bpf_insn_access_aux *info); |
| 1463 | int btf_struct_access(struct bpf_verifier_log *log, |
| 1464 | const struct btf_type *t, int off, int size, |
| 1465 | enum bpf_access_type atype, |
| 1466 | u32 *next_btf_id); |
| 1467 | bool btf_struct_ids_match(struct bpf_verifier_log *log, |
| 1468 | int off, u32 id, u32 need_type_id); |
| 1469 | |
| 1470 | int btf_distill_func_proto(struct bpf_verifier_log *log, |
| 1471 | struct btf *btf, |
| 1472 | const struct btf_type *func_proto, |
| 1473 | const char *func_name, |
| 1474 | struct btf_func_model *m); |
| 1475 | |
| 1476 | struct bpf_reg_state; |
| 1477 | int btf_check_func_arg_match(struct bpf_verifier_env *env, int subprog, |
| 1478 | struct bpf_reg_state *regs); |
| 1479 | int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog, |
| 1480 | struct bpf_reg_state *reg); |
| 1481 | int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog, |
| 1482 | struct btf *btf, const struct btf_type *t); |
| 1483 | |
| 1484 | struct bpf_prog *bpf_prog_by_id(u32 id); |
| 1485 | struct bpf_link *bpf_link_by_id(u32 id); |
| 1486 | |
| 1487 | const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id); |
| 1488 | |
| 1489 | static inline bool unprivileged_ebpf_enabled(void) |
| 1490 | { |
| 1491 | return !sysctl_unprivileged_bpf_disabled; |
| 1492 | } |
| 1493 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1494 | #else /* !CONFIG_BPF_SYSCALL */ |
| 1495 | static inline struct bpf_prog *bpf_prog_get(u32 ufd) |
| 1496 | { |
| 1497 | return ERR_PTR(-EOPNOTSUPP); |
| 1498 | } |
| 1499 | |
| 1500 | static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, |
| 1501 | enum bpf_prog_type type, |
| 1502 | bool attach_drv) |
| 1503 | { |
| 1504 | return ERR_PTR(-EOPNOTSUPP); |
| 1505 | } |
| 1506 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1507 | static inline void bpf_prog_add(struct bpf_prog *prog, int i) |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1508 | { |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1509 | } |
| 1510 | |
| 1511 | static inline void bpf_prog_sub(struct bpf_prog *prog, int i) |
| 1512 | { |
| 1513 | } |
| 1514 | |
| 1515 | static inline void bpf_prog_put(struct bpf_prog *prog) |
| 1516 | { |
| 1517 | } |
| 1518 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1519 | static inline void bpf_prog_inc(struct bpf_prog *prog) |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1520 | { |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1521 | } |
| 1522 | |
| 1523 | static inline struct bpf_prog *__must_check |
| 1524 | bpf_prog_inc_not_zero(struct bpf_prog *prog) |
| 1525 | { |
| 1526 | return ERR_PTR(-EOPNOTSUPP); |
| 1527 | } |
| 1528 | |
| 1529 | static inline int __bpf_prog_charge(struct user_struct *user, u32 pages) |
| 1530 | { |
| 1531 | return 0; |
| 1532 | } |
| 1533 | |
| 1534 | static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages) |
| 1535 | { |
| 1536 | } |
| 1537 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1538 | static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type, |
| 1539 | const struct bpf_link_ops *ops, |
| 1540 | struct bpf_prog *prog) |
| 1541 | { |
| 1542 | } |
| 1543 | |
| 1544 | static inline int bpf_link_prime(struct bpf_link *link, |
| 1545 | struct bpf_link_primer *primer) |
| 1546 | { |
| 1547 | return -EOPNOTSUPP; |
| 1548 | } |
| 1549 | |
| 1550 | static inline int bpf_link_settle(struct bpf_link_primer *primer) |
| 1551 | { |
| 1552 | return -EOPNOTSUPP; |
| 1553 | } |
| 1554 | |
| 1555 | static inline void bpf_link_cleanup(struct bpf_link_primer *primer) |
| 1556 | { |
| 1557 | } |
| 1558 | |
| 1559 | static inline void bpf_link_inc(struct bpf_link *link) |
| 1560 | { |
| 1561 | } |
| 1562 | |
| 1563 | static inline void bpf_link_put(struct bpf_link *link) |
| 1564 | { |
| 1565 | } |
| 1566 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1567 | static inline int bpf_obj_get_user(const char __user *pathname, int flags) |
| 1568 | { |
| 1569 | return -EOPNOTSUPP; |
| 1570 | } |
| 1571 | |
| 1572 | static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map, |
| 1573 | u32 key) |
| 1574 | { |
| 1575 | return NULL; |
| 1576 | } |
| 1577 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1578 | static inline struct net_device *__dev_map_hash_lookup_elem(struct bpf_map *map, |
| 1579 | u32 key) |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1580 | { |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1581 | return NULL; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1582 | } |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1583 | static inline bool dev_map_can_have_prog(struct bpf_map *map) |
| 1584 | { |
| 1585 | return false; |
| 1586 | } |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1587 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1588 | static inline void __dev_flush(void) |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1589 | { |
| 1590 | } |
| 1591 | |
| 1592 | struct xdp_buff; |
| 1593 | struct bpf_dtab_netdev; |
| 1594 | |
| 1595 | static inline |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1596 | int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp, |
| 1597 | struct net_device *dev_rx) |
| 1598 | { |
| 1599 | return 0; |
| 1600 | } |
| 1601 | |
| 1602 | static inline |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1603 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp, |
| 1604 | struct net_device *dev_rx) |
| 1605 | { |
| 1606 | return 0; |
| 1607 | } |
| 1608 | |
| 1609 | struct sk_buff; |
| 1610 | |
| 1611 | static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, |
| 1612 | struct sk_buff *skb, |
| 1613 | struct bpf_prog *xdp_prog) |
| 1614 | { |
| 1615 | return 0; |
| 1616 | } |
| 1617 | |
| 1618 | static inline |
| 1619 | struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key) |
| 1620 | { |
| 1621 | return NULL; |
| 1622 | } |
| 1623 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1624 | static inline void __cpu_map_flush(void) |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1625 | { |
| 1626 | } |
| 1627 | |
| 1628 | static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, |
| 1629 | struct xdp_buff *xdp, |
| 1630 | struct net_device *dev_rx) |
| 1631 | { |
| 1632 | return 0; |
| 1633 | } |
| 1634 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1635 | static inline bool cpu_map_prog_allowed(struct bpf_map *map) |
| 1636 | { |
| 1637 | return false; |
| 1638 | } |
| 1639 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1640 | static inline struct bpf_prog *bpf_prog_get_type_path(const char *name, |
| 1641 | enum bpf_prog_type type) |
| 1642 | { |
| 1643 | return ERR_PTR(-EOPNOTSUPP); |
| 1644 | } |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1645 | |
| 1646 | static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog, |
| 1647 | const union bpf_attr *kattr, |
| 1648 | union bpf_attr __user *uattr) |
| 1649 | { |
| 1650 | return -ENOTSUPP; |
| 1651 | } |
| 1652 | |
| 1653 | static inline int bpf_prog_test_run_skb(struct bpf_prog *prog, |
| 1654 | const union bpf_attr *kattr, |
| 1655 | union bpf_attr __user *uattr) |
| 1656 | { |
| 1657 | return -ENOTSUPP; |
| 1658 | } |
| 1659 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1660 | static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog, |
| 1661 | const union bpf_attr *kattr, |
| 1662 | union bpf_attr __user *uattr) |
| 1663 | { |
| 1664 | return -ENOTSUPP; |
| 1665 | } |
| 1666 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1667 | static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, |
| 1668 | const union bpf_attr *kattr, |
| 1669 | union bpf_attr __user *uattr) |
| 1670 | { |
| 1671 | return -ENOTSUPP; |
| 1672 | } |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1673 | |
| 1674 | static inline void bpf_map_put(struct bpf_map *map) |
| 1675 | { |
| 1676 | } |
| 1677 | |
| 1678 | static inline struct bpf_prog *bpf_prog_by_id(u32 id) |
| 1679 | { |
| 1680 | return ERR_PTR(-ENOTSUPP); |
| 1681 | } |
| 1682 | |
| 1683 | static inline const struct bpf_func_proto * |
| 1684 | bpf_base_func_proto(enum bpf_func_id func_id) |
| 1685 | { |
| 1686 | return NULL; |
| 1687 | } |
| 1688 | |
| 1689 | static inline bool unprivileged_ebpf_enabled(void) |
| 1690 | { |
| 1691 | return false; |
| 1692 | } |
| 1693 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1694 | #endif /* CONFIG_BPF_SYSCALL */ |
| 1695 | |
| 1696 | static inline struct bpf_prog *bpf_prog_get_type(u32 ufd, |
| 1697 | enum bpf_prog_type type) |
| 1698 | { |
| 1699 | return bpf_prog_get_type_dev(ufd, type, false); |
| 1700 | } |
| 1701 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1702 | void __bpf_free_used_maps(struct bpf_prog_aux *aux, |
| 1703 | struct bpf_map **used_maps, u32 len); |
| 1704 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1705 | bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool); |
| 1706 | |
| 1707 | int bpf_prog_offload_compile(struct bpf_prog *prog); |
| 1708 | void bpf_prog_offload_destroy(struct bpf_prog *prog); |
| 1709 | int bpf_prog_offload_info_fill(struct bpf_prog_info *info, |
| 1710 | struct bpf_prog *prog); |
| 1711 | |
| 1712 | int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map); |
| 1713 | |
| 1714 | int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value); |
| 1715 | int bpf_map_offload_update_elem(struct bpf_map *map, |
| 1716 | void *key, void *value, u64 flags); |
| 1717 | int bpf_map_offload_delete_elem(struct bpf_map *map, void *key); |
| 1718 | int bpf_map_offload_get_next_key(struct bpf_map *map, |
| 1719 | void *key, void *next_key); |
| 1720 | |
| 1721 | bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map); |
| 1722 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1723 | struct bpf_offload_dev * |
| 1724 | bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1725 | void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev); |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1726 | void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1727 | int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev, |
| 1728 | struct net_device *netdev); |
| 1729 | void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev, |
| 1730 | struct net_device *netdev); |
| 1731 | bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev); |
| 1732 | |
| 1733 | #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL) |
| 1734 | int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr); |
| 1735 | |
| 1736 | static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux) |
| 1737 | { |
| 1738 | return aux->offload_requested; |
| 1739 | } |
| 1740 | |
| 1741 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) |
| 1742 | { |
| 1743 | return unlikely(map->ops == &bpf_map_offload_ops); |
| 1744 | } |
| 1745 | |
| 1746 | struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr); |
| 1747 | void bpf_map_offload_map_free(struct bpf_map *map); |
| 1748 | #else |
| 1749 | static inline int bpf_prog_offload_init(struct bpf_prog *prog, |
| 1750 | union bpf_attr *attr) |
| 1751 | { |
| 1752 | return -EOPNOTSUPP; |
| 1753 | } |
| 1754 | |
| 1755 | static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux) |
| 1756 | { |
| 1757 | return false; |
| 1758 | } |
| 1759 | |
| 1760 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) |
| 1761 | { |
| 1762 | return false; |
| 1763 | } |
| 1764 | |
| 1765 | static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr) |
| 1766 | { |
| 1767 | return ERR_PTR(-EOPNOTSUPP); |
| 1768 | } |
| 1769 | |
| 1770 | static inline void bpf_map_offload_map_free(struct bpf_map *map) |
| 1771 | { |
| 1772 | } |
| 1773 | #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */ |
| 1774 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1775 | #if defined(CONFIG_BPF_STREAM_PARSER) |
Olivier Deprez | 0e64123 | 2021-09-23 10:07:05 +0200 | [diff] [blame] | 1776 | int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, |
| 1777 | struct bpf_prog *old, u32 which); |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1778 | int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog); |
Olivier Deprez | 0e64123 | 2021-09-23 10:07:05 +0200 | [diff] [blame] | 1779 | int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1780 | int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags); |
| 1781 | void sock_map_unhash(struct sock *sk); |
| 1782 | void sock_map_close(struct sock *sk, long timeout); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1783 | #else |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1784 | static inline int sock_map_prog_update(struct bpf_map *map, |
Olivier Deprez | 0e64123 | 2021-09-23 10:07:05 +0200 | [diff] [blame] | 1785 | struct bpf_prog *prog, |
| 1786 | struct bpf_prog *old, u32 which) |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1787 | { |
| 1788 | return -EOPNOTSUPP; |
| 1789 | } |
| 1790 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1791 | static inline int sock_map_get_from_fd(const union bpf_attr *attr, |
| 1792 | struct bpf_prog *prog) |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1793 | { |
| 1794 | return -EINVAL; |
| 1795 | } |
Olivier Deprez | 0e64123 | 2021-09-23 10:07:05 +0200 | [diff] [blame] | 1796 | |
| 1797 | static inline int sock_map_prog_detach(const union bpf_attr *attr, |
| 1798 | enum bpf_prog_type ptype) |
| 1799 | { |
| 1800 | return -EOPNOTSUPP; |
| 1801 | } |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1802 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1803 | static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, |
| 1804 | u64 flags) |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1805 | { |
| 1806 | return -EOPNOTSUPP; |
| 1807 | } |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1808 | #endif /* CONFIG_BPF_STREAM_PARSER */ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1809 | |
| 1810 | #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) |
| 1811 | void bpf_sk_reuseport_detach(struct sock *sk); |
| 1812 | int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key, |
| 1813 | void *value); |
| 1814 | int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key, |
| 1815 | void *value, u64 map_flags); |
| 1816 | #else |
| 1817 | static inline void bpf_sk_reuseport_detach(struct sock *sk) |
| 1818 | { |
| 1819 | } |
| 1820 | |
| 1821 | #ifdef CONFIG_BPF_SYSCALL |
| 1822 | static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, |
| 1823 | void *key, void *value) |
| 1824 | { |
| 1825 | return -EOPNOTSUPP; |
| 1826 | } |
| 1827 | |
| 1828 | static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, |
| 1829 | void *key, void *value, |
| 1830 | u64 map_flags) |
| 1831 | { |
| 1832 | return -EOPNOTSUPP; |
| 1833 | } |
| 1834 | #endif /* CONFIG_BPF_SYSCALL */ |
| 1835 | #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */ |
| 1836 | |
| 1837 | /* verifier prototypes for helper functions called from eBPF programs */ |
| 1838 | extern const struct bpf_func_proto bpf_map_lookup_elem_proto; |
| 1839 | extern const struct bpf_func_proto bpf_map_update_elem_proto; |
| 1840 | extern const struct bpf_func_proto bpf_map_delete_elem_proto; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1841 | extern const struct bpf_func_proto bpf_map_push_elem_proto; |
| 1842 | extern const struct bpf_func_proto bpf_map_pop_elem_proto; |
| 1843 | extern const struct bpf_func_proto bpf_map_peek_elem_proto; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1844 | |
| 1845 | extern const struct bpf_func_proto bpf_get_prandom_u32_proto; |
| 1846 | extern const struct bpf_func_proto bpf_get_smp_processor_id_proto; |
| 1847 | extern const struct bpf_func_proto bpf_get_numa_node_id_proto; |
| 1848 | extern const struct bpf_func_proto bpf_tail_call_proto; |
| 1849 | extern const struct bpf_func_proto bpf_ktime_get_ns_proto; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1850 | extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1851 | extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto; |
| 1852 | extern const struct bpf_func_proto bpf_get_current_uid_gid_proto; |
| 1853 | extern const struct bpf_func_proto bpf_get_current_comm_proto; |
| 1854 | extern const struct bpf_func_proto bpf_get_stackid_proto; |
| 1855 | extern const struct bpf_func_proto bpf_get_stack_proto; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1856 | extern const struct bpf_func_proto bpf_get_task_stack_proto; |
| 1857 | extern const struct bpf_func_proto bpf_get_stackid_proto_pe; |
| 1858 | extern const struct bpf_func_proto bpf_get_stack_proto_pe; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1859 | extern const struct bpf_func_proto bpf_sock_map_update_proto; |
| 1860 | extern const struct bpf_func_proto bpf_sock_hash_update_proto; |
| 1861 | extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1862 | extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1863 | extern const struct bpf_func_proto bpf_msg_redirect_hash_proto; |
| 1864 | extern const struct bpf_func_proto bpf_msg_redirect_map_proto; |
| 1865 | extern const struct bpf_func_proto bpf_sk_redirect_hash_proto; |
| 1866 | extern const struct bpf_func_proto bpf_sk_redirect_map_proto; |
| 1867 | extern const struct bpf_func_proto bpf_spin_lock_proto; |
| 1868 | extern const struct bpf_func_proto bpf_spin_unlock_proto; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1869 | extern const struct bpf_func_proto bpf_get_local_storage_proto; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1870 | extern const struct bpf_func_proto bpf_strtol_proto; |
| 1871 | extern const struct bpf_func_proto bpf_strtoul_proto; |
| 1872 | extern const struct bpf_func_proto bpf_tcp_sock_proto; |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1873 | extern const struct bpf_func_proto bpf_jiffies64_proto; |
| 1874 | extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto; |
| 1875 | extern const struct bpf_func_proto bpf_event_output_data_proto; |
| 1876 | extern const struct bpf_func_proto bpf_ringbuf_output_proto; |
| 1877 | extern const struct bpf_func_proto bpf_ringbuf_reserve_proto; |
| 1878 | extern const struct bpf_func_proto bpf_ringbuf_submit_proto; |
| 1879 | extern const struct bpf_func_proto bpf_ringbuf_discard_proto; |
| 1880 | extern const struct bpf_func_proto bpf_ringbuf_query_proto; |
| 1881 | extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto; |
| 1882 | extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto; |
| 1883 | extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto; |
| 1884 | extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto; |
| 1885 | extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto; |
| 1886 | extern const struct bpf_func_proto bpf_copy_from_user_proto; |
| 1887 | extern const struct bpf_func_proto bpf_snprintf_btf_proto; |
| 1888 | extern const struct bpf_func_proto bpf_per_cpu_ptr_proto; |
| 1889 | extern const struct bpf_func_proto bpf_this_cpu_ptr_proto; |
| 1890 | |
| 1891 | const struct bpf_func_proto *bpf_tracing_func_proto( |
| 1892 | enum bpf_func_id func_id, const struct bpf_prog *prog); |
| 1893 | |
| 1894 | const struct bpf_func_proto *tracing_prog_func_proto( |
| 1895 | enum bpf_func_id func_id, const struct bpf_prog *prog); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1896 | |
| 1897 | /* Shared helpers among cBPF and eBPF. */ |
| 1898 | void bpf_user_rnd_init_once(void); |
| 1899 | u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1900 | u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1901 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1902 | #if defined(CONFIG_NET) |
| 1903 | bool bpf_sock_common_is_valid_access(int off, int size, |
| 1904 | enum bpf_access_type type, |
| 1905 | struct bpf_insn_access_aux *info); |
| 1906 | bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type, |
| 1907 | struct bpf_insn_access_aux *info); |
| 1908 | u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, |
| 1909 | const struct bpf_insn *si, |
| 1910 | struct bpf_insn *insn_buf, |
| 1911 | struct bpf_prog *prog, |
| 1912 | u32 *target_size); |
| 1913 | #else |
| 1914 | static inline bool bpf_sock_common_is_valid_access(int off, int size, |
| 1915 | enum bpf_access_type type, |
| 1916 | struct bpf_insn_access_aux *info) |
| 1917 | { |
| 1918 | return false; |
| 1919 | } |
| 1920 | static inline bool bpf_sock_is_valid_access(int off, int size, |
| 1921 | enum bpf_access_type type, |
| 1922 | struct bpf_insn_access_aux *info) |
| 1923 | { |
| 1924 | return false; |
| 1925 | } |
| 1926 | static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, |
| 1927 | const struct bpf_insn *si, |
| 1928 | struct bpf_insn *insn_buf, |
| 1929 | struct bpf_prog *prog, |
| 1930 | u32 *target_size) |
| 1931 | { |
| 1932 | return 0; |
| 1933 | } |
| 1934 | #endif |
| 1935 | |
| 1936 | #ifdef CONFIG_INET |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1937 | struct sk_reuseport_kern { |
| 1938 | struct sk_buff *skb; |
| 1939 | struct sock *sk; |
| 1940 | struct sock *selected_sk; |
| 1941 | void *data_end; |
| 1942 | u32 hash; |
| 1943 | u32 reuseport_id; |
| 1944 | bool bind_inany; |
| 1945 | }; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1946 | bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type, |
| 1947 | struct bpf_insn_access_aux *info); |
| 1948 | |
| 1949 | u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, |
| 1950 | const struct bpf_insn *si, |
| 1951 | struct bpf_insn *insn_buf, |
| 1952 | struct bpf_prog *prog, |
| 1953 | u32 *target_size); |
| 1954 | |
| 1955 | bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type, |
| 1956 | struct bpf_insn_access_aux *info); |
| 1957 | |
| 1958 | u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, |
| 1959 | const struct bpf_insn *si, |
| 1960 | struct bpf_insn *insn_buf, |
| 1961 | struct bpf_prog *prog, |
| 1962 | u32 *target_size); |
| 1963 | #else |
| 1964 | static inline bool bpf_tcp_sock_is_valid_access(int off, int size, |
| 1965 | enum bpf_access_type type, |
| 1966 | struct bpf_insn_access_aux *info) |
| 1967 | { |
| 1968 | return false; |
| 1969 | } |
| 1970 | |
| 1971 | static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, |
| 1972 | const struct bpf_insn *si, |
| 1973 | struct bpf_insn *insn_buf, |
| 1974 | struct bpf_prog *prog, |
| 1975 | u32 *target_size) |
| 1976 | { |
| 1977 | return 0; |
| 1978 | } |
| 1979 | static inline bool bpf_xdp_sock_is_valid_access(int off, int size, |
| 1980 | enum bpf_access_type type, |
| 1981 | struct bpf_insn_access_aux *info) |
| 1982 | { |
| 1983 | return false; |
| 1984 | } |
| 1985 | |
| 1986 | static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, |
| 1987 | const struct bpf_insn *si, |
| 1988 | struct bpf_insn *insn_buf, |
| 1989 | struct bpf_prog *prog, |
| 1990 | u32 *target_size) |
| 1991 | { |
| 1992 | return 0; |
| 1993 | } |
| 1994 | #endif /* CONFIG_INET */ |
| 1995 | |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1996 | enum bpf_text_poke_type { |
| 1997 | BPF_MOD_CALL, |
| 1998 | BPF_MOD_JUMP, |
| 1999 | }; |
| 2000 | |
| 2001 | int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t, |
| 2002 | void *addr1, void *addr2); |
| 2003 | |
| 2004 | struct btf_id_set; |
| 2005 | bool btf_id_set_contains(const struct btf_id_set *set, u32 id); |
| 2006 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2007 | #endif /* _LINUX_BPF_H */ |