Eric Lee / smarc-fsl-linux-kernel

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Commit 04df41e343db9ca91a278ea14606bbaaf0491f2e

Authored by Lawrence Brakmo
Committed by David S. Miller
1 parent 6c4a01b278

bpf: update tools/include/uapi/linux/bpf.h 

Update tools/include/uapi/linux/bpf.h to include changes related to new
bpf sock_ops program type.

Signed-off-by: Lawrence Brakmo <brakmo@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Showing 1 changed file with 65 additions and 1 deletions Inline Diff

tools/include/uapi/linux/bpf.h
Diff comments   View file @ 04df41e
1 /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com 1 /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
2 * 2 *
3 * This program is free software; you can redistribute it and/or 3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of version 2 of the GNU General Public 4 * modify it under the terms of version 2 of the GNU General Public
5 * License as published by the Free Software Foundation. 5 * License as published by the Free Software Foundation.
6 */ 6 */
7 #ifndef _UAPI__LINUX_BPF_H__ 7 #ifndef _UAPI__LINUX_BPF_H__
8 #define _UAPI__LINUX_BPF_H__ 8 #define _UAPI__LINUX_BPF_H__
9 9
10 #include <linux/types.h> 10 #include <linux/types.h>
11 #include <linux/bpf_common.h> 11 #include <linux/bpf_common.h>
12 12
13 /* Extended instruction set based on top of classic BPF */ 13 /* Extended instruction set based on top of classic BPF */
14 14
15 /* instruction classes */ 15 /* instruction classes */
16 #define BPF_ALU64 0x07 /* alu mode in double word width */ 16 #define BPF_ALU64 0x07 /* alu mode in double word width */
17 17
18 /* ld/ldx fields */ 18 /* ld/ldx fields */
19 #define BPF_DW 0x18 /* double word */ 19 #define BPF_DW 0x18 /* double word */
20 #define BPF_XADD 0xc0 /* exclusive add */ 20 #define BPF_XADD 0xc0 /* exclusive add */
21 21
22 /* alu/jmp fields */ 22 /* alu/jmp fields */
23 #define BPF_MOV 0xb0 /* mov reg to reg */ 23 #define BPF_MOV 0xb0 /* mov reg to reg */
24 #define BPF_ARSH 0xc0 /* sign extending arithmetic shift right */ 24 #define BPF_ARSH 0xc0 /* sign extending arithmetic shift right */
25 25
26 /* change endianness of a register */ 26 /* change endianness of a register */
27 #define BPF_END 0xd0 /* flags for endianness conversion: */ 27 #define BPF_END 0xd0 /* flags for endianness conversion: */
28 #define BPF_TO_LE 0x00 /* convert to little-endian */ 28 #define BPF_TO_LE 0x00 /* convert to little-endian */
29 #define BPF_TO_BE 0x08 /* convert to big-endian */ 29 #define BPF_TO_BE 0x08 /* convert to big-endian */
30 #define BPF_FROM_LE BPF_TO_LE 30 #define BPF_FROM_LE BPF_TO_LE
31 #define BPF_FROM_BE BPF_TO_BE 31 #define BPF_FROM_BE BPF_TO_BE
32 32
33 #define BPF_JNE 0x50 /* jump != */ 33 #define BPF_JNE 0x50 /* jump != */
34 #define BPF_JSGT 0x60 /* SGT is signed '>', GT in x86 */ 34 #define BPF_JSGT 0x60 /* SGT is signed '>', GT in x86 */
35 #define BPF_JSGE 0x70 /* SGE is signed '>=', GE in x86 */ 35 #define BPF_JSGE 0x70 /* SGE is signed '>=', GE in x86 */
36 #define BPF_CALL 0x80 /* function call */ 36 #define BPF_CALL 0x80 /* function call */
37 #define BPF_EXIT 0x90 /* function return */ 37 #define BPF_EXIT 0x90 /* function return */
38 38
39 /* Register numbers */ 39 /* Register numbers */
40 enum { 40 enum {
41 BPF_REG_0 = 0, 41 BPF_REG_0 = 0,
42 BPF_REG_1, 42 BPF_REG_1,
43 BPF_REG_2, 43 BPF_REG_2,
44 BPF_REG_3, 44 BPF_REG_3,
45 BPF_REG_4, 45 BPF_REG_4,
46 BPF_REG_5, 46 BPF_REG_5,
47 BPF_REG_6, 47 BPF_REG_6,
48 BPF_REG_7, 48 BPF_REG_7,
49 BPF_REG_8, 49 BPF_REG_8,
50 BPF_REG_9, 50 BPF_REG_9,
51 BPF_REG_10, 51 BPF_REG_10,
52 __MAX_BPF_REG, 52 __MAX_BPF_REG,
53 }; 53 };
54 54
55 /* BPF has 10 general purpose 64-bit registers and stack frame. */ 55 /* BPF has 10 general purpose 64-bit registers and stack frame. */
56 #define MAX_BPF_REG __MAX_BPF_REG 56 #define MAX_BPF_REG __MAX_BPF_REG
57 57
58 struct bpf_insn { 58 struct bpf_insn {
59 __u8 code; /* opcode */ 59 __u8 code; /* opcode */
60 __u8 dst_reg:4; /* dest register */ 60 __u8 dst_reg:4; /* dest register */
61 __u8 src_reg:4; /* source register */ 61 __u8 src_reg:4; /* source register */
62 __s16 off; /* signed offset */ 62 __s16 off; /* signed offset */
63 __s32 imm; /* signed immediate constant */ 63 __s32 imm; /* signed immediate constant */
64 }; 64 };
65 65
66 /* Key of an a BPF_MAP_TYPE_LPM_TRIE entry */ 66 /* Key of an a BPF_MAP_TYPE_LPM_TRIE entry */
67 struct bpf_lpm_trie_key { 67 struct bpf_lpm_trie_key {
68 __u32 prefixlen; /* up to 32 for AF_INET, 128 for AF_INET6 */ 68 __u32 prefixlen; /* up to 32 for AF_INET, 128 for AF_INET6 */
69 __u8 data[0]; /* Arbitrary size */ 69 __u8 data[0]; /* Arbitrary size */
70 }; 70 };
71 71
72 /* BPF syscall commands, see bpf(2) man-page for details. */ 72 /* BPF syscall commands, see bpf(2) man-page for details. */
73 enum bpf_cmd { 73 enum bpf_cmd {
74 BPF_MAP_CREATE, 74 BPF_MAP_CREATE,
75 BPF_MAP_LOOKUP_ELEM, 75 BPF_MAP_LOOKUP_ELEM,
76 BPF_MAP_UPDATE_ELEM, 76 BPF_MAP_UPDATE_ELEM,
77 BPF_MAP_DELETE_ELEM, 77 BPF_MAP_DELETE_ELEM,
78 BPF_MAP_GET_NEXT_KEY, 78 BPF_MAP_GET_NEXT_KEY,
79 BPF_PROG_LOAD, 79 BPF_PROG_LOAD,
80 BPF_OBJ_PIN, 80 BPF_OBJ_PIN,
81 BPF_OBJ_GET, 81 BPF_OBJ_GET,
82 BPF_PROG_ATTACH, 82 BPF_PROG_ATTACH,
83 BPF_PROG_DETACH, 83 BPF_PROG_DETACH,
84 BPF_PROG_TEST_RUN, 84 BPF_PROG_TEST_RUN,
85 BPF_PROG_GET_NEXT_ID, 85 BPF_PROG_GET_NEXT_ID,
86 BPF_MAP_GET_NEXT_ID, 86 BPF_MAP_GET_NEXT_ID,
87 BPF_PROG_GET_FD_BY_ID, 87 BPF_PROG_GET_FD_BY_ID,
88 BPF_MAP_GET_FD_BY_ID, 88 BPF_MAP_GET_FD_BY_ID,
89 BPF_OBJ_GET_INFO_BY_FD, 89 BPF_OBJ_GET_INFO_BY_FD,
90 }; 90 };
91 91
92 enum bpf_map_type { 92 enum bpf_map_type {
93 BPF_MAP_TYPE_UNSPEC, 93 BPF_MAP_TYPE_UNSPEC,
94 BPF_MAP_TYPE_HASH, 94 BPF_MAP_TYPE_HASH,
95 BPF_MAP_TYPE_ARRAY, 95 BPF_MAP_TYPE_ARRAY,
96 BPF_MAP_TYPE_PROG_ARRAY, 96 BPF_MAP_TYPE_PROG_ARRAY,
97 BPF_MAP_TYPE_PERF_EVENT_ARRAY, 97 BPF_MAP_TYPE_PERF_EVENT_ARRAY,
98 BPF_MAP_TYPE_PERCPU_HASH, 98 BPF_MAP_TYPE_PERCPU_HASH,
99 BPF_MAP_TYPE_PERCPU_ARRAY, 99 BPF_MAP_TYPE_PERCPU_ARRAY,
100 BPF_MAP_TYPE_STACK_TRACE, 100 BPF_MAP_TYPE_STACK_TRACE,
101 BPF_MAP_TYPE_CGROUP_ARRAY, 101 BPF_MAP_TYPE_CGROUP_ARRAY,
102 BPF_MAP_TYPE_LRU_HASH, 102 BPF_MAP_TYPE_LRU_HASH,
103 BPF_MAP_TYPE_LRU_PERCPU_HASH, 103 BPF_MAP_TYPE_LRU_PERCPU_HASH,
104 BPF_MAP_TYPE_LPM_TRIE, 104 BPF_MAP_TYPE_LPM_TRIE,
105 BPF_MAP_TYPE_ARRAY_OF_MAPS, 105 BPF_MAP_TYPE_ARRAY_OF_MAPS,
106 BPF_MAP_TYPE_HASH_OF_MAPS, 106 BPF_MAP_TYPE_HASH_OF_MAPS,
107 }; 107 };
108 108
109 enum bpf_prog_type { 109 enum bpf_prog_type {
110 BPF_PROG_TYPE_UNSPEC, 110 BPF_PROG_TYPE_UNSPEC,
111 BPF_PROG_TYPE_SOCKET_FILTER, 111 BPF_PROG_TYPE_SOCKET_FILTER,
112 BPF_PROG_TYPE_KPROBE, 112 BPF_PROG_TYPE_KPROBE,
113 BPF_PROG_TYPE_SCHED_CLS, 113 BPF_PROG_TYPE_SCHED_CLS,
114 BPF_PROG_TYPE_SCHED_ACT, 114 BPF_PROG_TYPE_SCHED_ACT,
115 BPF_PROG_TYPE_TRACEPOINT, 115 BPF_PROG_TYPE_TRACEPOINT,
116 BPF_PROG_TYPE_XDP, 116 BPF_PROG_TYPE_XDP,
117 BPF_PROG_TYPE_PERF_EVENT, 117 BPF_PROG_TYPE_PERF_EVENT,
118 BPF_PROG_TYPE_CGROUP_SKB, 118 BPF_PROG_TYPE_CGROUP_SKB,
119 BPF_PROG_TYPE_CGROUP_SOCK, 119 BPF_PROG_TYPE_CGROUP_SOCK,
120 BPF_PROG_TYPE_LWT_IN, 120 BPF_PROG_TYPE_LWT_IN,
121 BPF_PROG_TYPE_LWT_OUT, 121 BPF_PROG_TYPE_LWT_OUT,
122 BPF_PROG_TYPE_LWT_XMIT, 122 BPF_PROG_TYPE_LWT_XMIT,
123 BPF_PROG_TYPE_SOCK_OPS,
123 }; 124 };
124 125
125 enum bpf_attach_type { 126 enum bpf_attach_type {
126 BPF_CGROUP_INET_INGRESS, 127 BPF_CGROUP_INET_INGRESS,
127 BPF_CGROUP_INET_EGRESS, 128 BPF_CGROUP_INET_EGRESS,
128 BPF_CGROUP_INET_SOCK_CREATE, 129 BPF_CGROUP_INET_SOCK_CREATE,
130 BPF_CGROUP_SOCK_OPS,
129 __MAX_BPF_ATTACH_TYPE 131 __MAX_BPF_ATTACH_TYPE
130 }; 132 };
131 133
132 #define MAX_BPF_ATTACH_TYPE __MAX_BPF_ATTACH_TYPE 134 #define MAX_BPF_ATTACH_TYPE __MAX_BPF_ATTACH_TYPE
133 135
134 /* If BPF_F_ALLOW_OVERRIDE flag is used in BPF_PROG_ATTACH command 136 /* If BPF_F_ALLOW_OVERRIDE flag is used in BPF_PROG_ATTACH command
135 * to the given target_fd cgroup the descendent cgroup will be able to 137 * to the given target_fd cgroup the descendent cgroup will be able to
136 * override effective bpf program that was inherited from this cgroup 138 * override effective bpf program that was inherited from this cgroup
137 */ 139 */
138 #define BPF_F_ALLOW_OVERRIDE (1U << 0) 140 #define BPF_F_ALLOW_OVERRIDE (1U << 0)
139 141
140 /* If BPF_F_STRICT_ALIGNMENT is used in BPF_PROG_LOAD command, the 142 /* If BPF_F_STRICT_ALIGNMENT is used in BPF_PROG_LOAD command, the
141 * verifier will perform strict alignment checking as if the kernel 143 * verifier will perform strict alignment checking as if the kernel
142 * has been built with CONFIG_EFFICIENT_UNALIGNED_ACCESS not set, 144 * has been built with CONFIG_EFFICIENT_UNALIGNED_ACCESS not set,
143 * and NET_IP_ALIGN defined to 2. 145 * and NET_IP_ALIGN defined to 2.
144 */ 146 */
145 #define BPF_F_STRICT_ALIGNMENT (1U << 0) 147 #define BPF_F_STRICT_ALIGNMENT (1U << 0)
146 148
147 #define BPF_PSEUDO_MAP_FD 1 149 #define BPF_PSEUDO_MAP_FD 1
148 150
149 /* flags for BPF_MAP_UPDATE_ELEM command */ 151 /* flags for BPF_MAP_UPDATE_ELEM command */
150 #define BPF_ANY 0 /* create new element or update existing */ 152 #define BPF_ANY 0 /* create new element or update existing */
151 #define BPF_NOEXIST 1 /* create new element if it didn't exist */ 153 #define BPF_NOEXIST 1 /* create new element if it didn't exist */
152 #define BPF_EXIST 2 /* update existing element */ 154 #define BPF_EXIST 2 /* update existing element */
153 155
154 #define BPF_F_NO_PREALLOC (1U << 0) 156 #define BPF_F_NO_PREALLOC (1U << 0)
155 /* Instead of having one common LRU list in the 157 /* Instead of having one common LRU list in the
156 * BPF_MAP_TYPE_LRU_[PERCPU_]HASH map, use a percpu LRU list 158 * BPF_MAP_TYPE_LRU_[PERCPU_]HASH map, use a percpu LRU list
157 * which can scale and perform better. 159 * which can scale and perform better.
158 * Note, the LRU nodes (including free nodes) cannot be moved 160 * Note, the LRU nodes (including free nodes) cannot be moved
159 * across different LRU lists. 161 * across different LRU lists.
160 */ 162 */
161 #define BPF_F_NO_COMMON_LRU (1U << 1) 163 #define BPF_F_NO_COMMON_LRU (1U << 1)
162 164
163 union bpf_attr { 165 union bpf_attr {
164 struct { /* anonymous struct used by BPF_MAP_CREATE command */ 166 struct { /* anonymous struct used by BPF_MAP_CREATE command */
165 __u32 map_type; /* one of enum bpf_map_type */ 167 __u32 map_type; /* one of enum bpf_map_type */
166 __u32 key_size; /* size of key in bytes */ 168 __u32 key_size; /* size of key in bytes */
167 __u32 value_size; /* size of value in bytes */ 169 __u32 value_size; /* size of value in bytes */
168 __u32 max_entries; /* max number of entries in a map */ 170 __u32 max_entries; /* max number of entries in a map */
169 __u32 map_flags; /* prealloc or not */ 171 __u32 map_flags; /* prealloc or not */
170 __u32 inner_map_fd; /* fd pointing to the inner map */ 172 __u32 inner_map_fd; /* fd pointing to the inner map */
171 }; 173 };
172 174
173 struct { /* anonymous struct used by BPF_MAP_*_ELEM commands */ 175 struct { /* anonymous struct used by BPF_MAP_*_ELEM commands */
174 __u32 map_fd; 176 __u32 map_fd;
175 __aligned_u64 key; 177 __aligned_u64 key;
176 union { 178 union {
177 __aligned_u64 value; 179 __aligned_u64 value;
178 __aligned_u64 next_key; 180 __aligned_u64 next_key;
179 }; 181 };
180 __u64 flags; 182 __u64 flags;
181 }; 183 };
182 184
183 struct { /* anonymous struct used by BPF_PROG_LOAD command */ 185 struct { /* anonymous struct used by BPF_PROG_LOAD command */
184 __u32 prog_type; /* one of enum bpf_prog_type */ 186 __u32 prog_type; /* one of enum bpf_prog_type */
185 __u32 insn_cnt; 187 __u32 insn_cnt;
186 __aligned_u64 insns; 188 __aligned_u64 insns;
187 __aligned_u64 license; 189 __aligned_u64 license;
188 __u32 log_level; /* verbosity level of verifier */ 190 __u32 log_level; /* verbosity level of verifier */
189 __u32 log_size; /* size of user buffer */ 191 __u32 log_size; /* size of user buffer */
190 __aligned_u64 log_buf; /* user supplied buffer */ 192 __aligned_u64 log_buf; /* user supplied buffer */
191 __u32 kern_version; /* checked when prog_type=kprobe */ 193 __u32 kern_version; /* checked when prog_type=kprobe */
192 __u32 prog_flags; 194 __u32 prog_flags;
193 }; 195 };
194 196
195 struct { /* anonymous struct used by BPF_OBJ_* commands */ 197 struct { /* anonymous struct used by BPF_OBJ_* commands */
196 __aligned_u64 pathname; 198 __aligned_u64 pathname;
197 __u32 bpf_fd; 199 __u32 bpf_fd;
198 }; 200 };
199 201
200 struct { /* anonymous struct used by BPF_PROG_ATTACH/DETACH commands */ 202 struct { /* anonymous struct used by BPF_PROG_ATTACH/DETACH commands */
201 __u32 target_fd; /* container object to attach to */ 203 __u32 target_fd; /* container object to attach to */
202 __u32 attach_bpf_fd; /* eBPF program to attach */ 204 __u32 attach_bpf_fd; /* eBPF program to attach */
203 __u32 attach_type; 205 __u32 attach_type;
204 __u32 attach_flags; 206 __u32 attach_flags;
205 }; 207 };
206 208
207 struct { /* anonymous struct used by BPF_PROG_TEST_RUN command */ 209 struct { /* anonymous struct used by BPF_PROG_TEST_RUN command */
208 __u32 prog_fd; 210 __u32 prog_fd;
209 __u32 retval; 211 __u32 retval;
210 __u32 data_size_in; 212 __u32 data_size_in;
211 __u32 data_size_out; 213 __u32 data_size_out;
212 __aligned_u64 data_in; 214 __aligned_u64 data_in;
213 __aligned_u64 data_out; 215 __aligned_u64 data_out;
214 __u32 repeat; 216 __u32 repeat;
215 __u32 duration; 217 __u32 duration;
216 } test; 218 } test;
217 219
218 struct { /* anonymous struct used by BPF_*_GET_*_ID */ 220 struct { /* anonymous struct used by BPF_*_GET_*_ID */
219 union { 221 union {
220 __u32 start_id; 222 __u32 start_id;
221 __u32 prog_id; 223 __u32 prog_id;
222 __u32 map_id; 224 __u32 map_id;
223 }; 225 };
224 __u32 next_id; 226 __u32 next_id;
225 }; 227 };
226 228
227 struct { /* anonymous struct used by BPF_OBJ_GET_INFO_BY_FD */ 229 struct { /* anonymous struct used by BPF_OBJ_GET_INFO_BY_FD */
228 __u32 bpf_fd; 230 __u32 bpf_fd;
229 __u32 info_len; 231 __u32 info_len;
230 __aligned_u64 info; 232 __aligned_u64 info;
231 } info; 233 } info;
232 } __attribute__((aligned(8))); 234 } __attribute__((aligned(8)));
233 235
234 /* BPF helper function descriptions: 236 /* BPF helper function descriptions:
235 * 237 *
236 * void *bpf_map_lookup_elem(&map, &key) 238 * void *bpf_map_lookup_elem(&map, &key)
237 * Return: Map value or NULL 239 * Return: Map value or NULL
238 * 240 *
239 * int bpf_map_update_elem(&map, &key, &value, flags) 241 * int bpf_map_update_elem(&map, &key, &value, flags)
240 * Return: 0 on success or negative error 242 * Return: 0 on success or negative error
241 * 243 *
242 * int bpf_map_delete_elem(&map, &key) 244 * int bpf_map_delete_elem(&map, &key)
243 * Return: 0 on success or negative error 245 * Return: 0 on success or negative error
244 * 246 *
245 * int bpf_probe_read(void *dst, int size, void *src) 247 * int bpf_probe_read(void *dst, int size, void *src)
246 * Return: 0 on success or negative error 248 * Return: 0 on success or negative error
247 * 249 *
248 * u64 bpf_ktime_get_ns(void) 250 * u64 bpf_ktime_get_ns(void)
249 * Return: current ktime 251 * Return: current ktime
250 * 252 *
251 * int bpf_trace_printk(const char *fmt, int fmt_size, ...) 253 * int bpf_trace_printk(const char *fmt, int fmt_size, ...)
252 * Return: length of buffer written or negative error 254 * Return: length of buffer written or negative error
253 * 255 *
254 * u32 bpf_prandom_u32(void) 256 * u32 bpf_prandom_u32(void)
255 * Return: random value 257 * Return: random value
256 * 258 *
257 * u32 bpf_raw_smp_processor_id(void) 259 * u32 bpf_raw_smp_processor_id(void)
258 * Return: SMP processor ID 260 * Return: SMP processor ID
259 * 261 *
260 * int bpf_skb_store_bytes(skb, offset, from, len, flags) 262 * int bpf_skb_store_bytes(skb, offset, from, len, flags)
261 * store bytes into packet 263 * store bytes into packet
262 * @skb: pointer to skb 264 * @skb: pointer to skb
263 * @offset: offset within packet from skb->mac_header 265 * @offset: offset within packet from skb->mac_header
264 * @from: pointer where to copy bytes from 266 * @from: pointer where to copy bytes from
265 * @len: number of bytes to store into packet 267 * @len: number of bytes to store into packet
266 * @flags: bit 0 - if true, recompute skb->csum 268 * @flags: bit 0 - if true, recompute skb->csum
267 * other bits - reserved 269 * other bits - reserved
268 * Return: 0 on success or negative error 270 * Return: 0 on success or negative error
269 * 271 *
270 * int bpf_l3_csum_replace(skb, offset, from, to, flags) 272 * int bpf_l3_csum_replace(skb, offset, from, to, flags)
271 * recompute IP checksum 273 * recompute IP checksum
272 * @skb: pointer to skb 274 * @skb: pointer to skb
273 * @offset: offset within packet where IP checksum is located 275 * @offset: offset within packet where IP checksum is located
274 * @from: old value of header field 276 * @from: old value of header field
275 * @to: new value of header field 277 * @to: new value of header field
276 * @flags: bits 0-3 - size of header field 278 * @flags: bits 0-3 - size of header field
277 * other bits - reserved 279 * other bits - reserved
278 * Return: 0 on success or negative error 280 * Return: 0 on success or negative error
279 * 281 *
280 * int bpf_l4_csum_replace(skb, offset, from, to, flags) 282 * int bpf_l4_csum_replace(skb, offset, from, to, flags)
281 * recompute TCP/UDP checksum 283 * recompute TCP/UDP checksum
282 * @skb: pointer to skb 284 * @skb: pointer to skb
283 * @offset: offset within packet where TCP/UDP checksum is located 285 * @offset: offset within packet where TCP/UDP checksum is located
284 * @from: old value of header field 286 * @from: old value of header field
285 * @to: new value of header field 287 * @to: new value of header field
286 * @flags: bits 0-3 - size of header field 288 * @flags: bits 0-3 - size of header field
287 * bit 4 - is pseudo header 289 * bit 4 - is pseudo header
288 * other bits - reserved 290 * other bits - reserved
289 * Return: 0 on success or negative error 291 * Return: 0 on success or negative error
290 * 292 *
291 * int bpf_tail_call(ctx, prog_array_map, index) 293 * int bpf_tail_call(ctx, prog_array_map, index)
292 * jump into another BPF program 294 * jump into another BPF program
293 * @ctx: context pointer passed to next program 295 * @ctx: context pointer passed to next program
294 * @prog_array_map: pointer to map which type is BPF_MAP_TYPE_PROG_ARRAY 296 * @prog_array_map: pointer to map which type is BPF_MAP_TYPE_PROG_ARRAY
295 * @index: index inside array that selects specific program to run 297 * @index: index inside array that selects specific program to run
296 * Return: 0 on success or negative error 298 * Return: 0 on success or negative error
297 * 299 *
298 * int bpf_clone_redirect(skb, ifindex, flags) 300 * int bpf_clone_redirect(skb, ifindex, flags)
299 * redirect to another netdev 301 * redirect to another netdev
300 * @skb: pointer to skb 302 * @skb: pointer to skb
301 * @ifindex: ifindex of the net device 303 * @ifindex: ifindex of the net device
302 * @flags: bit 0 - if set, redirect to ingress instead of egress 304 * @flags: bit 0 - if set, redirect to ingress instead of egress
303 * other bits - reserved 305 * other bits - reserved
304 * Return: 0 on success or negative error 306 * Return: 0 on success or negative error
305 * 307 *
306 * u64 bpf_get_current_pid_tgid(void) 308 * u64 bpf_get_current_pid_tgid(void)
307 * Return: current->tgid << 32 | current->pid 309 * Return: current->tgid << 32 | current->pid
308 * 310 *
309 * u64 bpf_get_current_uid_gid(void) 311 * u64 bpf_get_current_uid_gid(void)
310 * Return: current_gid << 32 | current_uid 312 * Return: current_gid << 32 | current_uid
311 * 313 *
312 * int bpf_get_current_comm(char *buf, int size_of_buf) 314 * int bpf_get_current_comm(char *buf, int size_of_buf)
313 * stores current->comm into buf 315 * stores current->comm into buf
314 * Return: 0 on success or negative error 316 * Return: 0 on success or negative error
315 * 317 *
316 * u32 bpf_get_cgroup_classid(skb) 318 * u32 bpf_get_cgroup_classid(skb)
317 * retrieve a proc's classid 319 * retrieve a proc's classid
318 * @skb: pointer to skb 320 * @skb: pointer to skb
319 * Return: classid if != 0 321 * Return: classid if != 0
320 * 322 *
321 * int bpf_skb_vlan_push(skb, vlan_proto, vlan_tci) 323 * int bpf_skb_vlan_push(skb, vlan_proto, vlan_tci)
322 * Return: 0 on success or negative error 324 * Return: 0 on success or negative error
323 * 325 *
324 * int bpf_skb_vlan_pop(skb) 326 * int bpf_skb_vlan_pop(skb)
325 * Return: 0 on success or negative error 327 * Return: 0 on success or negative error
326 * 328 *
327 * int bpf_skb_get_tunnel_key(skb, key, size, flags) 329 * int bpf_skb_get_tunnel_key(skb, key, size, flags)
328 * int bpf_skb_set_tunnel_key(skb, key, size, flags) 330 * int bpf_skb_set_tunnel_key(skb, key, size, flags)
329 * retrieve or populate tunnel metadata 331 * retrieve or populate tunnel metadata
330 * @skb: pointer to skb 332 * @skb: pointer to skb
331 * @key: pointer to 'struct bpf_tunnel_key' 333 * @key: pointer to 'struct bpf_tunnel_key'
332 * @size: size of 'struct bpf_tunnel_key' 334 * @size: size of 'struct bpf_tunnel_key'
333 * @flags: room for future extensions 335 * @flags: room for future extensions
334 * Return: 0 on success or negative error 336 * Return: 0 on success or negative error
335 * 337 *
336 * u64 bpf_perf_event_read(map, flags) 338 * u64 bpf_perf_event_read(map, flags)
337 * read perf event counter value 339 * read perf event counter value
338 * @map: pointer to perf_event_array map 340 * @map: pointer to perf_event_array map
339 * @flags: index of event in the map or bitmask flags 341 * @flags: index of event in the map or bitmask flags
340 * Return: value of perf event counter read or error code 342 * Return: value of perf event counter read or error code
341 * 343 *
342 * int bpf_redirect(ifindex, flags) 344 * int bpf_redirect(ifindex, flags)
343 * redirect to another netdev 345 * redirect to another netdev
344 * @ifindex: ifindex of the net device 346 * @ifindex: ifindex of the net device
345 * @flags: bit 0 - if set, redirect to ingress instead of egress 347 * @flags: bit 0 - if set, redirect to ingress instead of egress
346 * other bits - reserved 348 * other bits - reserved
347 * Return: TC_ACT_REDIRECT 349 * Return: TC_ACT_REDIRECT
348 * 350 *
349 * u32 bpf_get_route_realm(skb) 351 * u32 bpf_get_route_realm(skb)
350 * retrieve a dst's tclassid 352 * retrieve a dst's tclassid
351 * @skb: pointer to skb 353 * @skb: pointer to skb
352 * Return: realm if != 0 354 * Return: realm if != 0
353 * 355 *
354 * int bpf_perf_event_output(ctx, map, flags, data, size) 356 * int bpf_perf_event_output(ctx, map, flags, data, size)
355 * output perf raw sample 357 * output perf raw sample
356 * @ctx: struct pt_regs* 358 * @ctx: struct pt_regs*
357 * @map: pointer to perf_event_array map 359 * @map: pointer to perf_event_array map
358 * @flags: index of event in the map or bitmask flags 360 * @flags: index of event in the map or bitmask flags
359 * @data: data on stack to be output as raw data 361 * @data: data on stack to be output as raw data
360 * @size: size of data 362 * @size: size of data
361 * Return: 0 on success or negative error 363 * Return: 0 on success or negative error
362 * 364 *
363 * int bpf_get_stackid(ctx, map, flags) 365 * int bpf_get_stackid(ctx, map, flags)
364 * walk user or kernel stack and return id 366 * walk user or kernel stack and return id
365 * @ctx: struct pt_regs* 367 * @ctx: struct pt_regs*
366 * @map: pointer to stack_trace map 368 * @map: pointer to stack_trace map
367 * @flags: bits 0-7 - numer of stack frames to skip 369 * @flags: bits 0-7 - numer of stack frames to skip
368 * bit 8 - collect user stack instead of kernel 370 * bit 8 - collect user stack instead of kernel
369 * bit 9 - compare stacks by hash only 371 * bit 9 - compare stacks by hash only
370 * bit 10 - if two different stacks hash into the same stackid 372 * bit 10 - if two different stacks hash into the same stackid
371 * discard old 373 * discard old
372 * other bits - reserved 374 * other bits - reserved
373 * Return: >= 0 stackid on success or negative error 375 * Return: >= 0 stackid on success or negative error
374 * 376 *
375 * s64 bpf_csum_diff(from, from_size, to, to_size, seed) 377 * s64 bpf_csum_diff(from, from_size, to, to_size, seed)
376 * calculate csum diff 378 * calculate csum diff
377 * @from: raw from buffer 379 * @from: raw from buffer
378 * @from_size: length of from buffer 380 * @from_size: length of from buffer
379 * @to: raw to buffer 381 * @to: raw to buffer
380 * @to_size: length of to buffer 382 * @to_size: length of to buffer
381 * @seed: optional seed 383 * @seed: optional seed
382 * Return: csum result or negative error code 384 * Return: csum result or negative error code
383 * 385 *
384 * int bpf_skb_get_tunnel_opt(skb, opt, size) 386 * int bpf_skb_get_tunnel_opt(skb, opt, size)
385 * retrieve tunnel options metadata 387 * retrieve tunnel options metadata
386 * @skb: pointer to skb 388 * @skb: pointer to skb
387 * @opt: pointer to raw tunnel option data 389 * @opt: pointer to raw tunnel option data
388 * @size: size of @opt 390 * @size: size of @opt
389 * Return: option size 391 * Return: option size
390 * 392 *
391 * int bpf_skb_set_tunnel_opt(skb, opt, size) 393 * int bpf_skb_set_tunnel_opt(skb, opt, size)
392 * populate tunnel options metadata 394 * populate tunnel options metadata
393 * @skb: pointer to skb 395 * @skb: pointer to skb
394 * @opt: pointer to raw tunnel option data 396 * @opt: pointer to raw tunnel option data
395 * @size: size of @opt 397 * @size: size of @opt
396 * Return: 0 on success or negative error 398 * Return: 0 on success or negative error
397 * 399 *
398 * int bpf_skb_change_proto(skb, proto, flags) 400 * int bpf_skb_change_proto(skb, proto, flags)
399 * Change protocol of the skb. Currently supported is v4 -> v6, 401 * Change protocol of the skb. Currently supported is v4 -> v6,
400 * v6 -> v4 transitions. The helper will also resize the skb. eBPF 402 * v6 -> v4 transitions. The helper will also resize the skb. eBPF
401 * program is expected to fill the new headers via skb_store_bytes 403 * program is expected to fill the new headers via skb_store_bytes
402 * and lX_csum_replace. 404 * and lX_csum_replace.
403 * @skb: pointer to skb 405 * @skb: pointer to skb
404 * @proto: new skb->protocol type 406 * @proto: new skb->protocol type
405 * @flags: reserved 407 * @flags: reserved
406 * Return: 0 on success or negative error 408 * Return: 0 on success or negative error
407 * 409 *
408 * int bpf_skb_change_type(skb, type) 410 * int bpf_skb_change_type(skb, type)
409 * Change packet type of skb. 411 * Change packet type of skb.
410 * @skb: pointer to skb 412 * @skb: pointer to skb
411 * @type: new skb->pkt_type type 413 * @type: new skb->pkt_type type
412 * Return: 0 on success or negative error 414 * Return: 0 on success or negative error
413 * 415 *
414 * int bpf_skb_under_cgroup(skb, map, index) 416 * int bpf_skb_under_cgroup(skb, map, index)
415 * Check cgroup2 membership of skb 417 * Check cgroup2 membership of skb
416 * @skb: pointer to skb 418 * @skb: pointer to skb
417 * @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type 419 * @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type
418 * @index: index of the cgroup in the bpf_map 420 * @index: index of the cgroup in the bpf_map
419 * Return: 421 * Return:
420 * == 0 skb failed the cgroup2 descendant test 422 * == 0 skb failed the cgroup2 descendant test
421 * == 1 skb succeeded the cgroup2 descendant test 423 * == 1 skb succeeded the cgroup2 descendant test
422 * < 0 error 424 * < 0 error
423 * 425 *
424 * u32 bpf_get_hash_recalc(skb) 426 * u32 bpf_get_hash_recalc(skb)
425 * Retrieve and possibly recalculate skb->hash. 427 * Retrieve and possibly recalculate skb->hash.
426 * @skb: pointer to skb 428 * @skb: pointer to skb
427 * Return: hash 429 * Return: hash
428 * 430 *
429 * u64 bpf_get_current_task(void) 431 * u64 bpf_get_current_task(void)
430 * Returns current task_struct 432 * Returns current task_struct
431 * Return: current 433 * Return: current
432 * 434 *
433 * int bpf_probe_write_user(void *dst, void *src, int len) 435 * int bpf_probe_write_user(void *dst, void *src, int len)
434 * safely attempt to write to a location 436 * safely attempt to write to a location
435 * @dst: destination address in userspace 437 * @dst: destination address in userspace
436 * @src: source address on stack 438 * @src: source address on stack
437 * @len: number of bytes to copy 439 * @len: number of bytes to copy
438 * Return: 0 on success or negative error 440 * Return: 0 on success or negative error
439 * 441 *
440 * int bpf_current_task_under_cgroup(map, index) 442 * int bpf_current_task_under_cgroup(map, index)
441 * Check cgroup2 membership of current task 443 * Check cgroup2 membership of current task
442 * @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type 444 * @map: pointer to bpf_map in BPF_MAP_TYPE_CGROUP_ARRAY type
443 * @index: index of the cgroup in the bpf_map 445 * @index: index of the cgroup in the bpf_map
444 * Return: 446 * Return:
445 * == 0 current failed the cgroup2 descendant test 447 * == 0 current failed the cgroup2 descendant test
446 * == 1 current succeeded the cgroup2 descendant test 448 * == 1 current succeeded the cgroup2 descendant test
447 * < 0 error 449 * < 0 error
448 * 450 *
449 * int bpf_skb_change_tail(skb, len, flags) 451 * int bpf_skb_change_tail(skb, len, flags)
450 * The helper will resize the skb to the given new size, to be used f.e. 452 * The helper will resize the skb to the given new size, to be used f.e.
451 * with control messages. 453 * with control messages.
452 * @skb: pointer to skb 454 * @skb: pointer to skb
453 * @len: new skb length 455 * @len: new skb length
454 * @flags: reserved 456 * @flags: reserved
455 * Return: 0 on success or negative error 457 * Return: 0 on success or negative error
456 * 458 *
457 * int bpf_skb_pull_data(skb, len) 459 * int bpf_skb_pull_data(skb, len)
458 * The helper will pull in non-linear data in case the skb is non-linear 460 * The helper will pull in non-linear data in case the skb is non-linear
459 * and not all of len are part of the linear section. Only needed for 461 * and not all of len are part of the linear section. Only needed for
460 * read/write with direct packet access. 462 * read/write with direct packet access.
461 * @skb: pointer to skb 463 * @skb: pointer to skb
462 * @len: len to make read/writeable 464 * @len: len to make read/writeable
463 * Return: 0 on success or negative error 465 * Return: 0 on success or negative error
464 * 466 *
465 * s64 bpf_csum_update(skb, csum) 467 * s64 bpf_csum_update(skb, csum)
466 * Adds csum into skb->csum in case of CHECKSUM_COMPLETE. 468 * Adds csum into skb->csum in case of CHECKSUM_COMPLETE.
467 * @skb: pointer to skb 469 * @skb: pointer to skb
468 * @csum: csum to add 470 * @csum: csum to add
469 * Return: csum on success or negative error 471 * Return: csum on success or negative error
470 * 472 *
471 * void bpf_set_hash_invalid(skb) 473 * void bpf_set_hash_invalid(skb)
472 * Invalidate current skb->hash. 474 * Invalidate current skb->hash.
473 * @skb: pointer to skb 475 * @skb: pointer to skb
474 * 476 *
475 * int bpf_get_numa_node_id() 477 * int bpf_get_numa_node_id()
476 * Return: Id of current NUMA node. 478 * Return: Id of current NUMA node.
477 * 479 *
478 * int bpf_skb_change_head() 480 * int bpf_skb_change_head()
479 * Grows headroom of skb and adjusts MAC header offset accordingly. 481 * Grows headroom of skb and adjusts MAC header offset accordingly.
480 * Will extends/reallocae as required automatically. 482 * Will extends/reallocae as required automatically.
481 * May change skb data pointer and will thus invalidate any check 483 * May change skb data pointer and will thus invalidate any check
482 * performed for direct packet access. 484 * performed for direct packet access.
483 * @skb: pointer to skb 485 * @skb: pointer to skb
484 * @len: length of header to be pushed in front 486 * @len: length of header to be pushed in front
485 * @flags: Flags (unused for now) 487 * @flags: Flags (unused for now)
486 * Return: 0 on success or negative error 488 * Return: 0 on success or negative error
487 * 489 *
488 * int bpf_xdp_adjust_head(xdp_md, delta) 490 * int bpf_xdp_adjust_head(xdp_md, delta)
489 * Adjust the xdp_md.data by delta 491 * Adjust the xdp_md.data by delta
490 * @xdp_md: pointer to xdp_md 492 * @xdp_md: pointer to xdp_md
491 * @delta: An positive/negative integer to be added to xdp_md.data 493 * @delta: An positive/negative integer to be added to xdp_md.data
492 * Return: 0 on success or negative on error 494 * Return: 0 on success or negative on error
493 * 495 *
494 * int bpf_probe_read_str(void *dst, int size, const void *unsafe_ptr) 496 * int bpf_probe_read_str(void *dst, int size, const void *unsafe_ptr)
495 * Copy a NUL terminated string from unsafe address. In case the string 497 * Copy a NUL terminated string from unsafe address. In case the string
496 * length is smaller than size, the target is not padded with further NUL 498 * length is smaller than size, the target is not padded with further NUL
497 * bytes. In case the string length is larger than size, just count-1 499 * bytes. In case the string length is larger than size, just count-1
498 * bytes are copied and the last byte is set to NUL. 500 * bytes are copied and the last byte is set to NUL.
499 * @dst: destination address 501 * @dst: destination address
500 * @size: maximum number of bytes to copy, including the trailing NUL 502 * @size: maximum number of bytes to copy, including the trailing NUL
501 * @unsafe_ptr: unsafe address 503 * @unsafe_ptr: unsafe address
502 * Return: 504 * Return:
503 * > 0 length of the string including the trailing NUL on success 505 * > 0 length of the string including the trailing NUL on success
504 * < 0 error 506 * < 0 error
505 * 507 *
506 * u64 bpf_get_socket_cookie(skb) 508 * u64 bpf_get_socket_cookie(skb)
507 * Get the cookie for the socket stored inside sk_buff. 509 * Get the cookie for the socket stored inside sk_buff.
508 * @skb: pointer to skb 510 * @skb: pointer to skb
509 * Return: 8 Bytes non-decreasing number on success or 0 if the socket 511 * Return: 8 Bytes non-decreasing number on success or 0 if the socket
510 * field is missing inside sk_buff 512 * field is missing inside sk_buff
511 * 513 *
512 * u32 bpf_get_socket_uid(skb) 514 * u32 bpf_get_socket_uid(skb)
513 * Get the owner uid of the socket stored inside sk_buff. 515 * Get the owner uid of the socket stored inside sk_buff.
514 * @skb: pointer to skb 516 * @skb: pointer to skb
515 * Return: uid of the socket owner on success or overflowuid if failed. 517 * Return: uid of the socket owner on success or overflowuid if failed.
516 * 518 *
517 * u32 bpf_set_hash(skb, hash) 519 * u32 bpf_set_hash(skb, hash)
518 * Set full skb->hash. 520 * Set full skb->hash.
519 * @skb: pointer to skb 521 * @skb: pointer to skb
520 * @hash: hash to set 522 * @hash: hash to set
523 *
524 * int bpf_setsockopt(bpf_socket, level, optname, optval, optlen)
525 * Calls setsockopt. Not all opts are available, only those with
526 * integer optvals plus TCP_CONGESTION.
527 * Supported levels: SOL_SOCKET and IPROTO_TCP
528 * @bpf_socket: pointer to bpf_socket
529 * @level: SOL_SOCKET or IPROTO_TCP
530 * @optname: option name
531 * @optval: pointer to option value
532 * @optlen: length of optval in byes
533 * Return: 0 or negative error
521 */ 534 */
522 #define __BPF_FUNC_MAPPER(FN) \ 535 #define __BPF_FUNC_MAPPER(FN) \
523 FN(unspec), \ 536 FN(unspec), \
524 FN(map_lookup_elem), \ 537 FN(map_lookup_elem), \
525 FN(map_update_elem), \ 538 FN(map_update_elem), \
526 FN(map_delete_elem), \ 539 FN(map_delete_elem), \
527 FN(probe_read), \ 540 FN(probe_read), \
528 FN(ktime_get_ns), \ 541 FN(ktime_get_ns), \
529 FN(trace_printk), \ 542 FN(trace_printk), \
530 FN(get_prandom_u32), \ 543 FN(get_prandom_u32), \
531 FN(get_smp_processor_id), \ 544 FN(get_smp_processor_id), \
532 FN(skb_store_bytes), \ 545 FN(skb_store_bytes), \
533 FN(l3_csum_replace), \ 546 FN(l3_csum_replace), \
534 FN(l4_csum_replace), \ 547 FN(l4_csum_replace), \
535 FN(tail_call), \ 548 FN(tail_call), \
536 FN(clone_redirect), \ 549 FN(clone_redirect), \
537 FN(get_current_pid_tgid), \ 550 FN(get_current_pid_tgid), \
538 FN(get_current_uid_gid), \ 551 FN(get_current_uid_gid), \
539 FN(get_current_comm), \ 552 FN(get_current_comm), \
540 FN(get_cgroup_classid), \ 553 FN(get_cgroup_classid), \
541 FN(skb_vlan_push), \ 554 FN(skb_vlan_push), \
542 FN(skb_vlan_pop), \ 555 FN(skb_vlan_pop), \
543 FN(skb_get_tunnel_key), \ 556 FN(skb_get_tunnel_key), \
544 FN(skb_set_tunnel_key), \ 557 FN(skb_set_tunnel_key), \
545 FN(perf_event_read), \ 558 FN(perf_event_read), \
546 FN(redirect), \ 559 FN(redirect), \
547 FN(get_route_realm), \ 560 FN(get_route_realm), \
548 FN(perf_event_output), \ 561 FN(perf_event_output), \
549 FN(skb_load_bytes), \ 562 FN(skb_load_bytes), \
550 FN(get_stackid), \ 563 FN(get_stackid), \
551 FN(csum_diff), \ 564 FN(csum_diff), \
552 FN(skb_get_tunnel_opt), \ 565 FN(skb_get_tunnel_opt), \
553 FN(skb_set_tunnel_opt), \ 566 FN(skb_set_tunnel_opt), \
554 FN(skb_change_proto), \ 567 FN(skb_change_proto), \
555 FN(skb_change_type), \ 568 FN(skb_change_type), \
556 FN(skb_under_cgroup), \ 569 FN(skb_under_cgroup), \
557 FN(get_hash_recalc), \ 570 FN(get_hash_recalc), \
558 FN(get_current_task), \ 571 FN(get_current_task), \
559 FN(probe_write_user), \ 572 FN(probe_write_user), \
560 FN(current_task_under_cgroup), \ 573 FN(current_task_under_cgroup), \
561 FN(skb_change_tail), \ 574 FN(skb_change_tail), \
562 FN(skb_pull_data), \ 575 FN(skb_pull_data), \
563 FN(csum_update), \ 576 FN(csum_update), \
564 FN(set_hash_invalid), \ 577 FN(set_hash_invalid), \
565 FN(get_numa_node_id), \ 578 FN(get_numa_node_id), \
566 FN(skb_change_head), \ 579 FN(skb_change_head), \
567 FN(xdp_adjust_head), \ 580 FN(xdp_adjust_head), \
568 FN(probe_read_str), \ 581 FN(probe_read_str), \
569 FN(get_socket_cookie), \ 582 FN(get_socket_cookie), \
570 FN(get_socket_uid), \ 583 FN(get_socket_uid), \
571 FN(set_hash), 584 FN(set_hash), \
585 FN(setsockopt),
572 586
573 /* integer value in 'imm' field of BPF_CALL instruction selects which helper 587 /* integer value in 'imm' field of BPF_CALL instruction selects which helper
574 * function eBPF program intends to call 588 * function eBPF program intends to call
575 */ 589 */
576 #define __BPF_ENUM_FN(x) BPF_FUNC_ ## x 590 #define __BPF_ENUM_FN(x) BPF_FUNC_ ## x
577 enum bpf_func_id { 591 enum bpf_func_id {
578 __BPF_FUNC_MAPPER(__BPF_ENUM_FN) 592 __BPF_FUNC_MAPPER(__BPF_ENUM_FN)
579 __BPF_FUNC_MAX_ID, 593 __BPF_FUNC_MAX_ID,
580 }; 594 };
581 #undef __BPF_ENUM_FN 595 #undef __BPF_ENUM_FN
582 596
583 /* All flags used by eBPF helper functions, placed here. */ 597 /* All flags used by eBPF helper functions, placed here. */
584 598
585 /* BPF_FUNC_skb_store_bytes flags. */ 599 /* BPF_FUNC_skb_store_bytes flags. */
586 #define BPF_F_RECOMPUTE_CSUM (1ULL << 0) 600 #define BPF_F_RECOMPUTE_CSUM (1ULL << 0)
587 #define BPF_F_INVALIDATE_HASH (1ULL << 1) 601 #define BPF_F_INVALIDATE_HASH (1ULL << 1)
588 602
589 /* BPF_FUNC_l3_csum_replace and BPF_FUNC_l4_csum_replace flags. 603 /* BPF_FUNC_l3_csum_replace and BPF_FUNC_l4_csum_replace flags.
590 * First 4 bits are for passing the header field size. 604 * First 4 bits are for passing the header field size.
591 */ 605 */
592 #define BPF_F_HDR_FIELD_MASK 0xfULL 606 #define BPF_F_HDR_FIELD_MASK 0xfULL
593 607
594 /* BPF_FUNC_l4_csum_replace flags. */ 608 /* BPF_FUNC_l4_csum_replace flags. */
595 #define BPF_F_PSEUDO_HDR (1ULL << 4) 609 #define BPF_F_PSEUDO_HDR (1ULL << 4)
596 #define BPF_F_MARK_MANGLED_0 (1ULL << 5) 610 #define BPF_F_MARK_MANGLED_0 (1ULL << 5)
597 #define BPF_F_MARK_ENFORCE (1ULL << 6) 611 #define BPF_F_MARK_ENFORCE (1ULL << 6)
598 612
599 /* BPF_FUNC_clone_redirect and BPF_FUNC_redirect flags. */ 613 /* BPF_FUNC_clone_redirect and BPF_FUNC_redirect flags. */
600 #define BPF_F_INGRESS (1ULL << 0) 614 #define BPF_F_INGRESS (1ULL << 0)
601 615
602 /* BPF_FUNC_skb_set_tunnel_key and BPF_FUNC_skb_get_tunnel_key flags. */ 616 /* BPF_FUNC_skb_set_tunnel_key and BPF_FUNC_skb_get_tunnel_key flags. */
603 #define BPF_F_TUNINFO_IPV6 (1ULL << 0) 617 #define BPF_F_TUNINFO_IPV6 (1ULL << 0)
604 618
605 /* BPF_FUNC_get_stackid flags. */ 619 /* BPF_FUNC_get_stackid flags. */
606 #define BPF_F_SKIP_FIELD_MASK 0xffULL 620 #define BPF_F_SKIP_FIELD_MASK 0xffULL
607 #define BPF_F_USER_STACK (1ULL << 8) 621 #define BPF_F_USER_STACK (1ULL << 8)
608 #define BPF_F_FAST_STACK_CMP (1ULL << 9) 622 #define BPF_F_FAST_STACK_CMP (1ULL << 9)
609 #define BPF_F_REUSE_STACKID (1ULL << 10) 623 #define BPF_F_REUSE_STACKID (1ULL << 10)
610 624
611 /* BPF_FUNC_skb_set_tunnel_key flags. */ 625 /* BPF_FUNC_skb_set_tunnel_key flags. */
612 #define BPF_F_ZERO_CSUM_TX (1ULL << 1) 626 #define BPF_F_ZERO_CSUM_TX (1ULL << 1)
613 #define BPF_F_DONT_FRAGMENT (1ULL << 2) 627 #define BPF_F_DONT_FRAGMENT (1ULL << 2)
614 628
615 /* BPF_FUNC_perf_event_output and BPF_FUNC_perf_event_read flags. */ 629 /* BPF_FUNC_perf_event_output and BPF_FUNC_perf_event_read flags. */
616 #define BPF_F_INDEX_MASK 0xffffffffULL 630 #define BPF_F_INDEX_MASK 0xffffffffULL
617 #define BPF_F_CURRENT_CPU BPF_F_INDEX_MASK 631 #define BPF_F_CURRENT_CPU BPF_F_INDEX_MASK
618 /* BPF_FUNC_perf_event_output for sk_buff input context. */ 632 /* BPF_FUNC_perf_event_output for sk_buff input context. */
619 #define BPF_F_CTXLEN_MASK (0xfffffULL << 32) 633 #define BPF_F_CTXLEN_MASK (0xfffffULL << 32)
620 634
621 /* user accessible mirror of in-kernel sk_buff. 635 /* user accessible mirror of in-kernel sk_buff.
622 * new fields can only be added to the end of this structure 636 * new fields can only be added to the end of this structure
623 */ 637 */
624 struct __sk_buff { 638 struct __sk_buff {
625 __u32 len; 639 __u32 len;
626 __u32 pkt_type; 640 __u32 pkt_type;
627 __u32 mark; 641 __u32 mark;
628 __u32 queue_mapping; 642 __u32 queue_mapping;
629 __u32 protocol; 643 __u32 protocol;
630 __u32 vlan_present; 644 __u32 vlan_present;
631 __u32 vlan_tci; 645 __u32 vlan_tci;
632 __u32 vlan_proto; 646 __u32 vlan_proto;
633 __u32 priority; 647 __u32 priority;
634 __u32 ingress_ifindex; 648 __u32 ingress_ifindex;
635 __u32 ifindex; 649 __u32 ifindex;
636 __u32 tc_index; 650 __u32 tc_index;
637 __u32 cb[5]; 651 __u32 cb[5];
638 __u32 hash; 652 __u32 hash;
639 __u32 tc_classid; 653 __u32 tc_classid;
640 __u32 data; 654 __u32 data;
641 __u32 data_end; 655 __u32 data_end;
642 __u32 napi_id; 656 __u32 napi_id;
643 }; 657 };
644 658
645 struct bpf_tunnel_key { 659 struct bpf_tunnel_key {
646 __u32 tunnel_id; 660 __u32 tunnel_id;
647 union { 661 union {
648 __u32 remote_ipv4; 662 __u32 remote_ipv4;
649 __u32 remote_ipv6[4]; 663 __u32 remote_ipv6[4];
650 }; 664 };
651 __u8 tunnel_tos; 665 __u8 tunnel_tos;
652 __u8 tunnel_ttl; 666 __u8 tunnel_ttl;
653 __u16 tunnel_ext; 667 __u16 tunnel_ext;
654 __u32 tunnel_label; 668 __u32 tunnel_label;
655 }; 669 };
656 670
657 /* Generic BPF return codes which all BPF program types may support. 671 /* Generic BPF return codes which all BPF program types may support.
658 * The values are binary compatible with their TC_ACT_* counter-part to 672 * The values are binary compatible with their TC_ACT_* counter-part to
659 * provide backwards compatibility with existing SCHED_CLS and SCHED_ACT 673 * provide backwards compatibility with existing SCHED_CLS and SCHED_ACT
660 * programs. 674 * programs.
661 * 675 *
662 * XDP is handled seprately, see XDP_*. 676 * XDP is handled seprately, see XDP_*.
663 */ 677 */
664 enum bpf_ret_code { 678 enum bpf_ret_code {
665 BPF_OK = 0, 679 BPF_OK = 0,
666 /* 1 reserved */ 680 /* 1 reserved */
667 BPF_DROP = 2, 681 BPF_DROP = 2,
668 /* 3-6 reserved */ 682 /* 3-6 reserved */
669 BPF_REDIRECT = 7, 683 BPF_REDIRECT = 7,
670 /* >127 are reserved for prog type specific return codes */ 684 /* >127 are reserved for prog type specific return codes */
671 }; 685 };
672 686
673 struct bpf_sock { 687 struct bpf_sock {
674 __u32 bound_dev_if; 688 __u32 bound_dev_if;
675 __u32 family; 689 __u32 family;
676 __u32 type; 690 __u32 type;
677 __u32 protocol; 691 __u32 protocol;
678 }; 692 };
679 693
680 #define XDP_PACKET_HEADROOM 256 694 #define XDP_PACKET_HEADROOM 256
681 695
682 /* User return codes for XDP prog type. 696 /* User return codes for XDP prog type.
683 * A valid XDP program must return one of these defined values. All other 697 * A valid XDP program must return one of these defined values. All other
684 * return codes are reserved for future use. Unknown return codes will result 698 * return codes are reserved for future use. Unknown return codes will result
685 * in packet drop. 699 * in packet drop.
686 */ 700 */
687 enum xdp_action { 701 enum xdp_action {
688 XDP_ABORTED = 0, 702 XDP_ABORTED = 0,
689 XDP_DROP, 703 XDP_DROP,
690 XDP_PASS, 704 XDP_PASS,
691 XDP_TX, 705 XDP_TX,
692 }; 706 };
693 707
694 /* user accessible metadata for XDP packet hook 708 /* user accessible metadata for XDP packet hook
695 * new fields must be added to the end of this structure 709 * new fields must be added to the end of this structure
696 */ 710 */
697 struct xdp_md { 711 struct xdp_md {
698 __u32 data; 712 __u32 data;
699 __u32 data_end; 713 __u32 data_end;
700 }; 714 };
701 715
702 #define BPF_TAG_SIZE 8 716 #define BPF_TAG_SIZE 8
703 717
704 struct bpf_prog_info { 718 struct bpf_prog_info {
705 __u32 type; 719 __u32 type;
706 __u32 id; 720 __u32 id;
707 __u8 tag[BPF_TAG_SIZE]; 721 __u8 tag[BPF_TAG_SIZE];
708 __u32 jited_prog_len; 722 __u32 jited_prog_len;
709 __u32 xlated_prog_len; 723 __u32 xlated_prog_len;
710 __aligned_u64 jited_prog_insns; 724 __aligned_u64 jited_prog_insns;
711 __aligned_u64 xlated_prog_insns; 725 __aligned_u64 xlated_prog_insns;
712 } __attribute__((aligned(8))); 726 } __attribute__((aligned(8)));
713 727
714 struct bpf_map_info { 728 struct bpf_map_info {
715 __u32 type; 729 __u32 type;
716 __u32 id; 730 __u32 id;
717 __u32 key_size; 731 __u32 key_size;
718 __u32 value_size; 732 __u32 value_size;
719 __u32 max_entries; 733 __u32 max_entries;
720 __u32 map_flags; 734 __u32 map_flags;
721 } __attribute__((aligned(8))); 735 } __attribute__((aligned(8)));
736
737 /* User bpf_sock_ops struct to access socket values and specify request ops
738 * and their replies.
739 * New fields can only be added at the end of this structure
740 */
741 struct bpf_sock_ops {
742 __u32 op;
743 union {
744 __u32 reply;
745 __u32 replylong[4];
746 };
747 __u32 family;
748 __u32 remote_ip4;
749 __u32 local_ip4;
750 __u32 remote_ip6[4];
751 __u32 local_ip6[4];
752 __u32 remote_port;
753 __u32 local_port;
754 };
755
756 /* List of known BPF sock_ops operators.
757 * New entries can only be added at the end
758 */
759 enum {
760 BPF_SOCK_OPS_VOID,
761 BPF_SOCK_OPS_TIMEOUT_INIT, /* Should return SYN-RTO value to use or
762 * -1 if default value should be used
763 */
764 BPF_SOCK_OPS_RWND_INIT, /* Should return initial advertized
765 * window (in packets) or -1 if default
766 * value should be used
767 */
768 BPF_SOCK_OPS_TCP_CONNECT_CB, /* Calls BPF program right before an
769 * active connection is initialized
770 */
771 BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB, /* Calls BPF program when an
772 * active connection is
773 * established
774 */
775 BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB, /* Calls BPF program when a
776 * passive connection is
777 * established
778 */
779 BPF_SOCK_OPS_NEEDS_ECN, /* If connection's congestion control
780 * needs ECN
781 */
782 };
783
784 #define TCP_BPF_IW 1001 /* Set TCP initial congestion window */
785 #define TCP_BPF_SNDCWND_CLAMP 1002 /* Set sndcwnd_clamp */
722 786
723 #endif /* _UAPI__LINUX_BPF_H__ */ 787 #endif /* _UAPI__LINUX_BPF_H__ */
724 788