blob: c5984c45952bdd35cd4fda13a72f9fad1f2b7d46 [file] [log] [blame]
Martin KaFai Lauf89cb402017-10-19 23:52:54 -07001#include <time.h>
2#include <stdio.h>
3#include <errno.h>
4#include <string.h>
5#include <stdlib.h>
6#include <stdio.h>
7#include <stdint.h>
8#include <unistd.h>
9#include <ctype.h>
10#include <sysexits.h>
11
12#include "libbpf.h"
13
nikolay.samofatovc5308e92017-12-28 19:01:31 +030014// TODO: Remove this when CentOS 6 support is not needed anymore
15#ifndef CLOCK_BOOTTIME
16#define CLOCK_BOOTTIME 7
17#endif
18
Martin KaFai Lauf89cb402017-10-19 23:52:54 -070019static const char * const prog_type_strings[] = {
20 [BPF_PROG_TYPE_UNSPEC] = "unspec",
21 [BPF_PROG_TYPE_SOCKET_FILTER] = "socket filter",
22 [BPF_PROG_TYPE_KPROBE] = "kprobe",
23 [BPF_PROG_TYPE_SCHED_CLS] = "sched cls",
24 [BPF_PROG_TYPE_SCHED_ACT] = "sched act",
25 [BPF_PROG_TYPE_TRACEPOINT] = "tracepoint",
26 [BPF_PROG_TYPE_XDP] = "xdp",
27 [BPF_PROG_TYPE_PERF_EVENT] = "perf event",
28 [BPF_PROG_TYPE_CGROUP_SKB] = "cgroup skb",
29 [BPF_PROG_TYPE_CGROUP_SOCK] = "cgroup sock",
30 [BPF_PROG_TYPE_LWT_IN] = "lwt in",
31 [BPF_PROG_TYPE_LWT_OUT] = "lwt out",
32 [BPF_PROG_TYPE_LWT_XMIT] = "lwt xmit",
33 [BPF_PROG_TYPE_SOCK_OPS] = "sock ops",
34 [BPF_PROG_TYPE_SK_SKB] = "sk skb",
Yonghong Song6f3c8252018-06-10 18:04:11 -070035 [BPF_PROG_TYPE_CGROUP_DEVICE] = "cgroup_device",
36 [BPF_PROG_TYPE_SK_MSG] = "sk_msg",
37 [BPF_PROG_TYPE_RAW_TRACEPOINT] = "raw_tracepoint",
38 [BPF_PROG_TYPE_CGROUP_SOCK_ADDR] = "cgroup_sock_addr",
39 [BPF_PROG_TYPE_LIRC_MODE2] = "lirc_mode2",
yonghong-song3835b2d2018-08-16 18:49:06 -070040 [BPF_PROG_TYPE_SK_REUSEPORT] = "sk_reuseport",
yonghong-songd4b23872018-10-10 16:48:15 -070041 [BPF_PROG_TYPE_FLOW_DISSECTOR] = "flow_dissector",
Yonghong Song912d3572019-04-29 11:43:22 -070042 [BPF_PROG_TYPE_CGROUP_SYSCTL] = "cgroup_sysctl",
Yonghong Song3bdeff32019-05-17 10:26:44 -070043 [BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE] = "raw_tracepoint_writable",
Yonghong Song06e30cc2019-07-09 22:54:31 -070044 [BPF_PROG_TYPE_CGROUP_SOCKOPT] = "cgroup_sockopt",
yonghong-song992e4822019-11-13 13:37:58 -080045 [BPF_PROG_TYPE_TRACING] = "tracing",
Yonghong Song071eef62020-01-10 12:52:44 -080046 [BPF_PROG_TYPE_STRUCT_OPS] = "struct_ops",
Yonghong Song83b67c22020-01-27 14:35:21 -080047 [BPF_PROG_TYPE_EXT] = "ext",
Martin KaFai Lauf89cb402017-10-19 23:52:54 -070048};
49
50static const char * const map_type_strings[] = {
51 [BPF_MAP_TYPE_UNSPEC] = "unspec",
52 [BPF_MAP_TYPE_HASH] = "hash",
53 [BPF_MAP_TYPE_ARRAY] = "array",
54 [BPF_MAP_TYPE_PROG_ARRAY] = "prog array",
55 [BPF_MAP_TYPE_PERF_EVENT_ARRAY] = "perf-ev array",
56 [BPF_MAP_TYPE_PERCPU_HASH] = "percpu hash",
57 [BPF_MAP_TYPE_PERCPU_ARRAY] = "percpu array",
58 [BPF_MAP_TYPE_STACK_TRACE] = "stack trace",
59 [BPF_MAP_TYPE_CGROUP_ARRAY] = "cgroup array",
60 [BPF_MAP_TYPE_LRU_HASH] = "lru hash",
61 [BPF_MAP_TYPE_LRU_PERCPU_HASH] = "lru percpu hash",
62 [BPF_MAP_TYPE_LPM_TRIE] = "lpm trie",
63 [BPF_MAP_TYPE_ARRAY_OF_MAPS] = "array of maps",
64 [BPF_MAP_TYPE_HASH_OF_MAPS] = "hash of maps",
65 [BPF_MAP_TYPE_DEVMAP] = "devmap",
66 [BPF_MAP_TYPE_SOCKMAP] = "sockmap",
Yonghong Song6f3c8252018-06-10 18:04:11 -070067 [BPF_MAP_TYPE_CPUMAP] = "cpumap",
68 [BPF_MAP_TYPE_SOCKHASH] = "sockhash",
yonghong-song3835b2d2018-08-16 18:49:06 -070069 [BPF_MAP_TYPE_CGROUP_STORAGE] = "cgroup_storage",
70 [BPF_MAP_TYPE_REUSEPORT_SOCKARRAY] = "reuseport_sockarray",
Yonghong Song2a68bd82018-10-27 23:14:52 -070071 [BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE] = "precpu_cgroup_storage",
72 [BPF_MAP_TYPE_QUEUE] = "queue",
73 [BPF_MAP_TYPE_STACK] = "stack",
Yonghong Song3bdeff32019-05-17 10:26:44 -070074 [BPF_MAP_TYPE_SK_STORAGE] = "sk_storage",
yonghong-songeb018cf2019-10-02 16:34:38 -070075 [BPF_MAP_TYPE_DEVMAP_HASH] = "devmap_hash",
Yonghong Song071eef62020-01-10 12:52:44 -080076 [BPF_MAP_TYPE_STRUCT_OPS] = "struct_ops",
Martin KaFai Lauf89cb402017-10-19 23:52:54 -070077};
78
79#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
80#define LAST_KNOWN_PROG_TYPE (ARRAY_SIZE(prog_type_strings) - 1)
81#define LAST_KNOWN_MAP_TYPE (ARRAY_SIZE(map_type_strings) - 1)
82#define min(x, y) ((x) < (y) ? (x) : (y))
83
84static inline uint64_t ptr_to_u64(const void *ptr)
85{
86 return (uint64_t) (unsigned long) ptr;
87}
88
89static inline void * u64_to_ptr(uint64_t ptr)
90{
91 return (void *) (unsigned long ) ptr;
92}
93
94static int handle_get_next_errno(int eno)
95{
96 switch (eno) {
97 case ENOENT:
98 return 0;
99 case EINVAL:
100 fprintf(stderr, "Kernel does not support BPF introspection\n");
101 return EX_UNAVAILABLE;
102 case EPERM:
103 fprintf(stderr,
104 "Require CAP_SYS_ADMIN capability. Please retry as root\n");
105 return EX_NOPERM;
106 default:
107 fprintf(stderr, "%s\n", strerror(errno));
108 return 1;
109 }
110}
111
112static void print_prog_hdr(void)
113{
114 printf("%9s %-15s %8s %6s %-12s %-15s\n",
115 "BID", "TYPE", "UID", "#MAPS", "LoadTime", "NAME");
116}
117
118static void print_prog_info(const struct bpf_prog_info *prog_info)
119{
120 struct timespec real_time_ts, boot_time_ts;
121 time_t wallclock_load_time = 0;
122 char unknown_prog_type[16];
123 const char *prog_type;
124 char load_time[16];
125 struct tm load_tm;
126
127 if (prog_info->type > LAST_KNOWN_PROG_TYPE) {
128 snprintf(unknown_prog_type, sizeof(unknown_prog_type), "<%u>",
129 prog_info->type);
130 unknown_prog_type[sizeof(unknown_prog_type) - 1] = '\0';
131 prog_type = unknown_prog_type;
132 } else {
133 prog_type = prog_type_strings[prog_info->type];
134 }
135
136 if (!clock_gettime(CLOCK_REALTIME, &real_time_ts) &&
137 !clock_gettime(CLOCK_BOOTTIME, &boot_time_ts) &&
138 real_time_ts.tv_sec >= boot_time_ts.tv_sec)
139 wallclock_load_time =
140 (real_time_ts.tv_sec - boot_time_ts.tv_sec) +
141 prog_info->load_time / 1000000000;
142
143 if (wallclock_load_time && localtime_r(&wallclock_load_time, &load_tm))
144 strftime(load_time, sizeof(load_time), "%b%d/%H:%M", &load_tm);
145 else
146 snprintf(load_time, sizeof(load_time), "<%llu>",
147 prog_info->load_time / 1000000000);
148 load_time[sizeof(load_time) - 1] = '\0';
149
150 if (prog_info->jited_prog_len)
151 printf("%9u %-15s %8u %6u %-12s %-15s\n",
152 prog_info->id, prog_type, prog_info->created_by_uid,
153 prog_info->nr_map_ids, load_time, prog_info->name);
154 else
155 printf("%8u- %-15s %8u %6u %-12s %-15s\n",
156 prog_info->id, prog_type, prog_info->created_by_uid,
157 prog_info->nr_map_ids, load_time, prog_info->name);
158}
159
160static void print_map_hdr(void)
161{
162 printf("%8s %-15s %-10s %8s %8s %8s %-15s\n",
163 "MID", "TYPE", "FLAGS", "KeySz", "ValueSz", "MaxEnts",
164 "NAME");
165}
166
167static void print_map_info(const struct bpf_map_info *map_info)
168{
169 char unknown_map_type[16];
170 const char *map_type;
171
172 if (map_info->type > LAST_KNOWN_MAP_TYPE) {
173 snprintf(unknown_map_type, sizeof(unknown_map_type),
174 "<%u>", map_info->type);
175 unknown_map_type[sizeof(unknown_map_type) - 1] = '\0';
176 map_type = unknown_map_type;
177 } else {
178 map_type = map_type_strings[map_info->type];
179 }
180
181 printf("%8u %-15s 0x%-8x %8u %8u %8u %-15s\n",
182 map_info->id, map_type, map_info->map_flags, map_info->key_size,
183 map_info->value_size, map_info->max_entries,
184 map_info->name);
185}
186
187static int print_one_prog(uint32_t prog_id)
188{
189 const uint32_t usual_nr_map_ids = 64;
190 uint32_t nr_map_ids = usual_nr_map_ids;
191 struct bpf_prog_info prog_info;
192 uint32_t *map_ids = NULL;
193 uint32_t info_len;
194 int ret = 0;
195 int prog_fd;
196 uint32_t i;
197
198 prog_fd = bpf_prog_get_fd_by_id(prog_id);
199 if (prog_fd == -1) {
200 if (errno == ENOENT) {
201 fprintf(stderr, "BID:%u not found\n", prog_id);
202 return EX_DATAERR;
203 } else {
204 return handle_get_next_errno(errno);
205 }
206 }
207
208 /* Retry at most one time for larger map_ids array */
209 for (i = 0; i < 2; i++) {
210 bzero(&prog_info, sizeof(prog_info));
211 prog_info.map_ids = ptr_to_u64(realloc(map_ids,
212 nr_map_ids * sizeof(*map_ids)));
213 if (!prog_info.map_ids) {
214 fprintf(stderr,
215 "Cannot allocate memory for %u map_ids for BID:%u\n",
216 nr_map_ids, prog_id);
217 close(prog_fd);
218 free(map_ids);
219 return 1;
220 }
221
222 map_ids = u64_to_ptr(prog_info.map_ids);
223 prog_info.nr_map_ids = nr_map_ids;
224 info_len = sizeof(prog_info);
225 ret = bpf_obj_get_info(prog_fd, &prog_info, &info_len);
226 if (ret) {
227 fprintf(stderr, "Cannot get info for BID:%u. %s(%d)\n",
228 prog_id, strerror(errno), errno);
229 close(prog_fd);
230 free(map_ids);
231 return ret;
232 }
233
234 if (prog_info.nr_map_ids <= nr_map_ids)
235 break;
236
237 nr_map_ids = prog_info.nr_map_ids;
238 }
239 close(prog_fd);
240
241 print_prog_hdr();
242 print_prog_info(&prog_info);
243 printf("\n");
244
245 /* Print all map_info used by the prog */
246 print_map_hdr();
247 nr_map_ids = min(prog_info.nr_map_ids, nr_map_ids);
248 for (i = 0; i < nr_map_ids; i++) {
249 struct bpf_map_info map_info = {};
Teng Qind77a41b2017-10-31 12:05:17 -0700250 info_len = sizeof(map_info);
Martin KaFai Lauf89cb402017-10-19 23:52:54 -0700251 int map_fd;
252
253 map_fd = bpf_map_get_fd_by_id(map_ids[i]);
254 if (map_fd == -1) {
255 if (errno == -ENOENT)
256 continue;
257
258 fprintf(stderr,
259 "Cannot get fd for map:%u. %s(%d)\n",
260 map_ids[i], strerror(errno), errno);
261 ret = map_fd;
262 break;
263 }
264
265 ret = bpf_obj_get_info(map_fd, &map_info, &info_len);
266 close(map_fd);
267 if (ret) {
268 fprintf(stderr, "Cannot get info for map:%u. %s(%d)\n",
269 map_ids[i], strerror(errno), errno);
270 break;
271 }
272
273 print_map_info(&map_info);
274 }
275
276 free(map_ids);
277 return ret;
278}
279
280int print_all_progs(void)
281{
282 uint32_t next_id = 0;
283
284 print_prog_hdr();
285
286 while (!bpf_prog_get_next_id(next_id, &next_id)) {
287 struct bpf_prog_info prog_info = {};
288 uint32_t prog_info_len = sizeof(prog_info);
289 int prog_fd;
290 int ret;
291
292 prog_fd = bpf_prog_get_fd_by_id(next_id);
293 if (prog_fd < 0) {
294 if (errno == ENOENT)
295 continue;
296 fprintf(stderr,
297 "Cannot get fd for BID:%u. %s(%d)\n",
298 next_id, strerror(errno), errno);
299 return 1;
300 }
301
302 ret = bpf_obj_get_info(prog_fd, &prog_info, &prog_info_len);
303 close(prog_fd);
304 if (ret) {
305 fprintf(stderr,
306 "Cannot get bpf_prog_info for BID:%u. %s(%d)\n",
307 next_id, strerror(errno), errno);
308 return ret;
309 }
310
311 print_prog_info(&prog_info);
312 }
313
314 return handle_get_next_errno(errno);
315}
316
317void usage(void)
318{
319 printf("BPF Program Snapshot (bps):\n"
320 "List of all BPF programs loaded into the system.\n\n");
321 printf("Usage: bps [bpf-prog-id]\n");
322 printf(" [bpf-prog-id] If specified, it shows the details info of the bpf-prog\n");
323 printf("\n");
324}
325
326int main(int argc, char **argv)
327{
328 if (argc > 1) {
329 if (!isdigit(*argv[1])) {
330 usage();
331 return EX_USAGE;
332 }
333 return print_one_prog((uint32_t)atoi(argv[1]));
334 }
335
336 return print_all_progs();
337}