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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
249b812d AS |
2 | #ifndef __BPF_HELPERS_H |
3 | #define __BPF_HELPERS_H | |
4 | ||
5 | /* helper macro to place programs, maps, license in | |
6 | * different sections in elf_bpf file. Section names | |
7 | * are interpreted by elf_bpf loader | |
8 | */ | |
9 | #define SEC(NAME) __attribute__((section(NAME), used)) | |
10 | ||
11 | /* helper functions called from eBPF programs written in C */ | |
12 | static void *(*bpf_map_lookup_elem)(void *map, void *key) = | |
13 | (void *) BPF_FUNC_map_lookup_elem; | |
14 | static int (*bpf_map_update_elem)(void *map, void *key, void *value, | |
15 | unsigned long long flags) = | |
16 | (void *) BPF_FUNC_map_update_elem; | |
17 | static int (*bpf_map_delete_elem)(void *map, void *key) = | |
18 | (void *) BPF_FUNC_map_delete_elem; | |
b896c4f9 AS |
19 | static int (*bpf_probe_read)(void *dst, int size, void *unsafe_ptr) = |
20 | (void *) BPF_FUNC_probe_read; | |
21 | static unsigned long long (*bpf_ktime_get_ns)(void) = | |
22 | (void *) BPF_FUNC_ktime_get_ns; | |
23 | static int (*bpf_trace_printk)(const char *fmt, int fmt_size, ...) = | |
24 | (void *) BPF_FUNC_trace_printk; | |
5bacd780 AS |
25 | static void (*bpf_tail_call)(void *ctx, void *map, int index) = |
26 | (void *) BPF_FUNC_tail_call; | |
530b2c86 AS |
27 | static unsigned long long (*bpf_get_smp_processor_id)(void) = |
28 | (void *) BPF_FUNC_get_smp_processor_id; | |
ffeedafb AS |
29 | static unsigned long long (*bpf_get_current_pid_tgid)(void) = |
30 | (void *) BPF_FUNC_get_current_pid_tgid; | |
31 | static unsigned long long (*bpf_get_current_uid_gid)(void) = | |
32 | (void *) BPF_FUNC_get_current_uid_gid; | |
33 | static int (*bpf_get_current_comm)(void *buf, int buf_size) = | |
34 | (void *) BPF_FUNC_get_current_comm; | |
41e9a804 TQ |
35 | static unsigned long long (*bpf_perf_event_read)(void *map, |
36 | unsigned long long flags) = | |
47efb302 | 37 | (void *) BPF_FUNC_perf_event_read; |
27b29f63 AS |
38 | static int (*bpf_clone_redirect)(void *ctx, int ifindex, int flags) = |
39 | (void *) BPF_FUNC_clone_redirect; | |
40 | static int (*bpf_redirect)(int ifindex, int flags) = | |
41 | (void *) BPF_FUNC_redirect; | |
9d6e0052 JF |
42 | static int (*bpf_redirect_map)(void *map, int key, int flags) = |
43 | (void *) BPF_FUNC_redirect_map; | |
05b8ad25 AB |
44 | static int (*bpf_perf_event_output)(void *ctx, void *map, |
45 | unsigned long long flags, void *data, | |
46 | int size) = | |
39111695 | 47 | (void *) BPF_FUNC_perf_event_output; |
a6ffe7b9 AS |
48 | static int (*bpf_get_stackid)(void *ctx, void *map, int flags) = |
49 | (void *) BPF_FUNC_get_stackid; | |
96ae5227 SD |
50 | static int (*bpf_probe_write_user)(void *dst, void *src, int size) = |
51 | (void *) BPF_FUNC_probe_write_user; | |
9e6e60ec SD |
52 | static int (*bpf_current_task_under_cgroup)(void *map, int index) = |
53 | (void *) BPF_FUNC_current_task_under_cgroup; | |
6afb1e28 WT |
54 | static int (*bpf_skb_get_tunnel_key)(void *ctx, void *key, int size, int flags) = |
55 | (void *) BPF_FUNC_skb_get_tunnel_key; | |
56 | static int (*bpf_skb_set_tunnel_key)(void *ctx, void *key, int size, int flags) = | |
57 | (void *) BPF_FUNC_skb_set_tunnel_key; | |
58 | static int (*bpf_skb_get_tunnel_opt)(void *ctx, void *md, int size) = | |
59 | (void *) BPF_FUNC_skb_get_tunnel_opt; | |
60 | static int (*bpf_skb_set_tunnel_opt)(void *ctx, void *md, int size) = | |
61 | (void *) BPF_FUNC_skb_set_tunnel_opt; | |
1c47910e AS |
62 | static unsigned long long (*bpf_get_prandom_u32)(void) = |
63 | (void *) BPF_FUNC_get_prandom_u32; | |
12d8bb64 MKL |
64 | static int (*bpf_xdp_adjust_head)(void *ctx, int offset) = |
65 | (void *) BPF_FUNC_xdp_adjust_head; | |
22c88526 DB |
66 | static int (*bpf_xdp_adjust_meta)(void *ctx, int offset) = |
67 | (void *) BPF_FUNC_xdp_adjust_meta; | |
8c4b4c7e LB |
68 | static int (*bpf_setsockopt)(void *ctx, int level, int optname, void *optval, |
69 | int optlen) = | |
70 | (void *) BPF_FUNC_setsockopt; | |
cd86d1fd LB |
71 | static int (*bpf_getsockopt)(void *ctx, int level, int optname, void *optval, |
72 | int optlen) = | |
73 | (void *) BPF_FUNC_getsockopt; | |
d6d4f60c LB |
74 | static int (*bpf_sock_ops_cb_flags_set)(void *ctx, int flags) = |
75 | (void *) BPF_FUNC_sock_ops_cb_flags_set; | |
34f79502 | 76 | static int (*bpf_sk_redirect_map)(void *ctx, void *map, int key, int flags) = |
69e8cc13 JF |
77 | (void *) BPF_FUNC_sk_redirect_map; |
78 | static int (*bpf_sock_map_update)(void *map, void *key, void *value, | |
464bc0fd | 79 | unsigned long long flags) = |
69e8cc13 | 80 | (void *) BPF_FUNC_sock_map_update; |
020a32d9 YS |
81 | static int (*bpf_perf_event_read_value)(void *map, unsigned long long flags, |
82 | void *buf, unsigned int buf_size) = | |
83 | (void *) BPF_FUNC_perf_event_read_value; | |
81b9cf80 YS |
84 | static int (*bpf_perf_prog_read_value)(void *ctx, void *buf, |
85 | unsigned int buf_size) = | |
86 | (void *) BPF_FUNC_perf_prog_read_value; | |
965de87e JB |
87 | static int (*bpf_override_return)(void *ctx, unsigned long rc) = |
88 | (void *) BPF_FUNC_override_return; | |
4c4c3c27 JF |
89 | static int (*bpf_msg_redirect_map)(void *ctx, void *map, int key, int flags) = |
90 | (void *) BPF_FUNC_msg_redirect_map; | |
1c16c312 JF |
91 | static int (*bpf_msg_apply_bytes)(void *ctx, int len) = |
92 | (void *) BPF_FUNC_msg_apply_bytes; | |
468b3fde JF |
93 | static int (*bpf_msg_cork_bytes)(void *ctx, int len) = |
94 | (void *) BPF_FUNC_msg_cork_bytes; | |
0dcbbf67 JF |
95 | static int (*bpf_msg_pull_data)(void *ctx, int start, int end, int flags) = |
96 | (void *) BPF_FUNC_msg_pull_data; | |
249b812d AS |
97 | |
98 | /* llvm builtin functions that eBPF C program may use to | |
99 | * emit BPF_LD_ABS and BPF_LD_IND instructions | |
100 | */ | |
101 | struct sk_buff; | |
102 | unsigned long long load_byte(void *skb, | |
103 | unsigned long long off) asm("llvm.bpf.load.byte"); | |
104 | unsigned long long load_half(void *skb, | |
105 | unsigned long long off) asm("llvm.bpf.load.half"); | |
106 | unsigned long long load_word(void *skb, | |
107 | unsigned long long off) asm("llvm.bpf.load.word"); | |
108 | ||
109 | /* a helper structure used by eBPF C program | |
110 | * to describe map attributes to elf_bpf loader | |
111 | */ | |
112 | struct bpf_map_def { | |
113 | unsigned int type; | |
114 | unsigned int key_size; | |
115 | unsigned int value_size; | |
116 | unsigned int max_entries; | |
89b97607 | 117 | unsigned int map_flags; |
fb30d4b7 | 118 | unsigned int inner_map_idx; |
ad17d0e6 | 119 | unsigned int numa_node; |
249b812d AS |
120 | }; |
121 | ||
f74599f7 TG |
122 | static int (*bpf_skb_load_bytes)(void *ctx, int off, void *to, int len) = |
123 | (void *) BPF_FUNC_skb_load_bytes; | |
91bc4822 AS |
124 | static int (*bpf_skb_store_bytes)(void *ctx, int off, void *from, int len, int flags) = |
125 | (void *) BPF_FUNC_skb_store_bytes; | |
126 | static int (*bpf_l3_csum_replace)(void *ctx, int off, int from, int to, int flags) = | |
127 | (void *) BPF_FUNC_l3_csum_replace; | |
128 | static int (*bpf_l4_csum_replace)(void *ctx, int off, int from, int to, int flags) = | |
129 | (void *) BPF_FUNC_l4_csum_replace; | |
747ea55e DB |
130 | static int (*bpf_skb_under_cgroup)(void *ctx, void *map, int index) = |
131 | (void *) BPF_FUNC_skb_under_cgroup; | |
f74599f7 TG |
132 | static int (*bpf_skb_change_head)(void *, int len, int flags) = |
133 | (void *) BPF_FUNC_skb_change_head; | |
82a86168 JF |
134 | static int (*bpf_skb_pull_data)(void *, int len) = |
135 | (void *) BPF_FUNC_skb_pull_data; | |
91bc4822 | 136 | |
b655fc1c JF |
137 | /* Scan the ARCH passed in from ARCH env variable (see Makefile) */ |
138 | #if defined(__TARGET_ARCH_x86) | |
139 | #define bpf_target_x86 | |
140 | #define bpf_target_defined | |
141 | #elif defined(__TARGET_ARCH_s930x) | |
142 | #define bpf_target_s930x | |
143 | #define bpf_target_defined | |
144 | #elif defined(__TARGET_ARCH_arm64) | |
145 | #define bpf_target_arm64 | |
146 | #define bpf_target_defined | |
147 | #elif defined(__TARGET_ARCH_mips) | |
148 | #define bpf_target_mips | |
149 | #define bpf_target_defined | |
150 | #elif defined(__TARGET_ARCH_powerpc) | |
151 | #define bpf_target_powerpc | |
152 | #define bpf_target_defined | |
153 | #elif defined(__TARGET_ARCH_sparc) | |
154 | #define bpf_target_sparc | |
155 | #define bpf_target_defined | |
156 | #else | |
157 | #undef bpf_target_defined | |
158 | #endif | |
159 | ||
160 | /* Fall back to what the compiler says */ | |
161 | #ifndef bpf_target_defined | |
d912557b | 162 | #if defined(__x86_64__) |
b655fc1c JF |
163 | #define bpf_target_x86 |
164 | #elif defined(__s390x__) | |
165 | #define bpf_target_s930x | |
166 | #elif defined(__aarch64__) | |
167 | #define bpf_target_arm64 | |
168 | #elif defined(__mips__) | |
169 | #define bpf_target_mips | |
170 | #elif defined(__powerpc__) | |
171 | #define bpf_target_powerpc | |
172 | #elif defined(__sparc__) | |
173 | #define bpf_target_sparc | |
174 | #endif | |
175 | #endif | |
176 | ||
177 | #if defined(bpf_target_x86) | |
d912557b MH |
178 | |
179 | #define PT_REGS_PARM1(x) ((x)->di) | |
180 | #define PT_REGS_PARM2(x) ((x)->si) | |
181 | #define PT_REGS_PARM3(x) ((x)->dx) | |
182 | #define PT_REGS_PARM4(x) ((x)->cx) | |
183 | #define PT_REGS_PARM5(x) ((x)->r8) | |
184 | #define PT_REGS_RET(x) ((x)->sp) | |
185 | #define PT_REGS_FP(x) ((x)->bp) | |
186 | #define PT_REGS_RC(x) ((x)->ax) | |
187 | #define PT_REGS_SP(x) ((x)->sp) | |
138d6153 | 188 | #define PT_REGS_IP(x) ((x)->ip) |
d912557b | 189 | |
b655fc1c | 190 | #elif defined(bpf_target_s390x) |
d912557b MH |
191 | |
192 | #define PT_REGS_PARM1(x) ((x)->gprs[2]) | |
193 | #define PT_REGS_PARM2(x) ((x)->gprs[3]) | |
194 | #define PT_REGS_PARM3(x) ((x)->gprs[4]) | |
195 | #define PT_REGS_PARM4(x) ((x)->gprs[5]) | |
196 | #define PT_REGS_PARM5(x) ((x)->gprs[6]) | |
197 | #define PT_REGS_RET(x) ((x)->gprs[14]) | |
198 | #define PT_REGS_FP(x) ((x)->gprs[11]) /* Works only with CONFIG_FRAME_POINTER */ | |
199 | #define PT_REGS_RC(x) ((x)->gprs[2]) | |
200 | #define PT_REGS_SP(x) ((x)->gprs[15]) | |
2dbb4c05 | 201 | #define PT_REGS_IP(x) ((x)->psw.addr) |
d912557b | 202 | |
b655fc1c | 203 | #elif defined(bpf_target_arm64) |
85ff8a43 YS |
204 | |
205 | #define PT_REGS_PARM1(x) ((x)->regs[0]) | |
206 | #define PT_REGS_PARM2(x) ((x)->regs[1]) | |
207 | #define PT_REGS_PARM3(x) ((x)->regs[2]) | |
208 | #define PT_REGS_PARM4(x) ((x)->regs[3]) | |
209 | #define PT_REGS_PARM5(x) ((x)->regs[4]) | |
210 | #define PT_REGS_RET(x) ((x)->regs[30]) | |
211 | #define PT_REGS_FP(x) ((x)->regs[29]) /* Works only with CONFIG_FRAME_POINTER */ | |
212 | #define PT_REGS_RC(x) ((x)->regs[0]) | |
213 | #define PT_REGS_SP(x) ((x)->sp) | |
138d6153 NR |
214 | #define PT_REGS_IP(x) ((x)->pc) |
215 | ||
b655fc1c | 216 | #elif defined(bpf_target_mips) |
c1932cdb DD |
217 | |
218 | #define PT_REGS_PARM1(x) ((x)->regs[4]) | |
219 | #define PT_REGS_PARM2(x) ((x)->regs[5]) | |
220 | #define PT_REGS_PARM3(x) ((x)->regs[6]) | |
221 | #define PT_REGS_PARM4(x) ((x)->regs[7]) | |
222 | #define PT_REGS_PARM5(x) ((x)->regs[8]) | |
223 | #define PT_REGS_RET(x) ((x)->regs[31]) | |
224 | #define PT_REGS_FP(x) ((x)->regs[30]) /* Works only with CONFIG_FRAME_POINTER */ | |
225 | #define PT_REGS_RC(x) ((x)->regs[1]) | |
226 | #define PT_REGS_SP(x) ((x)->regs[29]) | |
227 | #define PT_REGS_IP(x) ((x)->cp0_epc) | |
228 | ||
b655fc1c | 229 | #elif defined(bpf_target_powerpc) |
138d6153 NR |
230 | |
231 | #define PT_REGS_PARM1(x) ((x)->gpr[3]) | |
232 | #define PT_REGS_PARM2(x) ((x)->gpr[4]) | |
233 | #define PT_REGS_PARM3(x) ((x)->gpr[5]) | |
234 | #define PT_REGS_PARM4(x) ((x)->gpr[6]) | |
235 | #define PT_REGS_PARM5(x) ((x)->gpr[7]) | |
236 | #define PT_REGS_RC(x) ((x)->gpr[3]) | |
237 | #define PT_REGS_SP(x) ((x)->sp) | |
238 | #define PT_REGS_IP(x) ((x)->nip) | |
85ff8a43 | 239 | |
b655fc1c | 240 | #elif defined(bpf_target_sparc) |
b0c47807 DM |
241 | |
242 | #define PT_REGS_PARM1(x) ((x)->u_regs[UREG_I0]) | |
243 | #define PT_REGS_PARM2(x) ((x)->u_regs[UREG_I1]) | |
244 | #define PT_REGS_PARM3(x) ((x)->u_regs[UREG_I2]) | |
245 | #define PT_REGS_PARM4(x) ((x)->u_regs[UREG_I3]) | |
246 | #define PT_REGS_PARM5(x) ((x)->u_regs[UREG_I4]) | |
247 | #define PT_REGS_RET(x) ((x)->u_regs[UREG_I7]) | |
248 | #define PT_REGS_RC(x) ((x)->u_regs[UREG_I0]) | |
249 | #define PT_REGS_SP(x) ((x)->u_regs[UREG_FP]) | |
b655fc1c JF |
250 | |
251 | /* Should this also be a bpf_target check for the sparc case? */ | |
b0c47807 DM |
252 | #if defined(__arch64__) |
253 | #define PT_REGS_IP(x) ((x)->tpc) | |
254 | #else | |
255 | #define PT_REGS_IP(x) ((x)->pc) | |
256 | #endif | |
257 | ||
d912557b | 258 | #endif |
138d6153 | 259 | |
b655fc1c | 260 | #ifdef bpf_target_powerpc |
138d6153 NR |
261 | #define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ (ip) = (ctx)->link; }) |
262 | #define BPF_KRETPROBE_READ_RET_IP BPF_KPROBE_READ_RET_IP | |
b655fc1c | 263 | #elif bpf_target_sparc |
b0c47807 DM |
264 | #define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ (ip) = PT_REGS_RET(ctx); }) |
265 | #define BPF_KRETPROBE_READ_RET_IP BPF_KPROBE_READ_RET_IP | |
138d6153 NR |
266 | #else |
267 | #define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ \ | |
268 | bpf_probe_read(&(ip), sizeof(ip), (void *)PT_REGS_RET(ctx)); }) | |
269 | #define BPF_KRETPROBE_READ_RET_IP(ip, ctx) ({ \ | |
270 | bpf_probe_read(&(ip), sizeof(ip), \ | |
271 | (void *)(PT_REGS_FP(ctx) + sizeof(ip))); }) | |
272 | #endif | |
273 | ||
249b812d | 274 | #endif |