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10#include <sys/types.h>
11#include <sys/time.h>
12#include <time.h>
13#include <dirent.h>
14#include <errno.h>
15#include <unistd.h>
16#include "builtin.h"
17#include "perf.h"
18#include "namespaces.h"
19#include "util/cache.h"
20#include "util/debug.h"
21#include "util/header.h"
22#include <subcmd/parse-options.h>
23#include "util/strlist.h"
24#include "util/build-id.h"
25#include "util/session.h"
26#include "util/symbol.h"
27#include "util/time-utils.h"
28
29static int build_id_cache__kcore_buildid(const char *proc_dir, char *sbuildid)
30{
31 char root_dir[PATH_MAX];
32 char *p;
33
34 strlcpy(root_dir, proc_dir, sizeof(root_dir));
35
36 p = strrchr(root_dir, '/');
37 if (!p)
38 return -1;
39 *p = '\0';
40 return sysfs__sprintf_build_id(root_dir, sbuildid);
41}
42
43static int build_id_cache__kcore_dir(char *dir, size_t sz)
44{
45 return fetch_current_timestamp(dir, sz);
46}
47
48static bool same_kallsyms_reloc(const char *from_dir, char *to_dir)
49{
50 char from[PATH_MAX];
51 char to[PATH_MAX];
52 const char *name;
53 u64 addr1 = 0, addr2 = 0;
54 int i, err = -1;
55
56 scnprintf(from, sizeof(from), "%s/kallsyms", from_dir);
57 scnprintf(to, sizeof(to), "%s/kallsyms", to_dir);
58
59 for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) {
60 err = kallsyms__get_function_start(from, name, &addr1);
61 if (!err)
62 break;
63 }
64
65 if (err)
66 return false;
67
68 if (kallsyms__get_function_start(to, name, &addr2))
69 return false;
70
71 return addr1 == addr2;
72}
73
74static int build_id_cache__kcore_existing(const char *from_dir, char *to_dir,
75 size_t to_dir_sz)
76{
77 char from[PATH_MAX];
78 char to[PATH_MAX];
79 char to_subdir[PATH_MAX];
80 struct dirent *dent;
81 int ret = -1;
82 DIR *d;
83
84 d = opendir(to_dir);
85 if (!d)
86 return -1;
87
88 scnprintf(from, sizeof(from), "%s/modules", from_dir);
89
90 while (1) {
91 dent = readdir(d);
92 if (!dent)
93 break;
94 if (dent->d_type != DT_DIR)
95 continue;
96 scnprintf(to, sizeof(to), "%s/%s/modules", to_dir,
97 dent->d_name);
98 scnprintf(to_subdir, sizeof(to_subdir), "%s/%s",
99 to_dir, dent->d_name);
100 if (!compare_proc_modules(from, to) &&
101 same_kallsyms_reloc(from_dir, to_subdir)) {
102 strlcpy(to_dir, to_subdir, to_dir_sz);
103 ret = 0;
104 break;
105 }
106 }
107
108 closedir(d);
109
110 return ret;
111}
112
113static int build_id_cache__add_kcore(const char *filename, bool force)
114{
115 char dir[32], sbuildid[SBUILD_ID_SIZE];
116 char from_dir[PATH_MAX], to_dir[PATH_MAX];
117 char *p;
118
119 strlcpy(from_dir, filename, sizeof(from_dir));
120
121 p = strrchr(from_dir, '/');
122 if (!p || strcmp(p + 1, "kcore"))
123 return -1;
124 *p = '\0';
125
126 if (build_id_cache__kcore_buildid(from_dir, sbuildid) < 0)
127 return -1;
128
129 scnprintf(to_dir, sizeof(to_dir), "%s/%s/%s",
130 buildid_dir, DSO__NAME_KCORE, sbuildid);
131
132 if (!force &&
133 !build_id_cache__kcore_existing(from_dir, to_dir, sizeof(to_dir))) {
134 pr_debug("same kcore found in %s\n", to_dir);
135 return 0;
136 }
137
138 if (build_id_cache__kcore_dir(dir, sizeof(dir)))
139 return -1;
140
141 scnprintf(to_dir, sizeof(to_dir), "%s/%s/%s/%s",
142 buildid_dir, DSO__NAME_KCORE, sbuildid, dir);
143
144 if (mkdir_p(to_dir, 0755))
145 return -1;
146
147 if (kcore_copy(from_dir, to_dir)) {
148
149 if (!rmdir(to_dir)) {
150 p = strrchr(to_dir, '/');
151 if (p)
152 *p = '\0';
153
154 if (!rmdir(to_dir)) {
155 p = strrchr(to_dir, '/');
156 if (p)
157 *p = '\0';
158
159 rmdir(to_dir);
160 }
161 }
162 return -1;
163 }
164
165 pr_debug("kcore added to build-id cache directory %s\n", to_dir);
166
167 return 0;
168}
169
170static int build_id_cache__add_file(const char *filename, struct nsinfo *nsi)
171{
172 char sbuild_id[SBUILD_ID_SIZE];
173 u8 build_id[BUILD_ID_SIZE];
174 int err;
175 struct nscookie nsc;
176
177 nsinfo__mountns_enter(nsi, &nsc);
178 err = filename__read_build_id(filename, &build_id, sizeof(build_id));
179 nsinfo__mountns_exit(&nsc);
180 if (err < 0) {
181 pr_debug("Couldn't read a build-id in %s\n", filename);
182 return -1;
183 }
184
185 build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
186 err = build_id_cache__add_s(sbuild_id, filename, nsi,
187 false, false);
188 pr_debug("Adding %s %s: %s\n", sbuild_id, filename,
189 err ? "FAIL" : "Ok");
190 return err;
191}
192
193static int build_id_cache__remove_file(const char *filename, struct nsinfo *nsi)
194{
195 u8 build_id[BUILD_ID_SIZE];
196 char sbuild_id[SBUILD_ID_SIZE];
197 struct nscookie nsc;
198
199 int err;
200
201 nsinfo__mountns_enter(nsi, &nsc);
202 err = filename__read_build_id(filename, &build_id, sizeof(build_id));
203 nsinfo__mountns_exit(&nsc);
204 if (err < 0) {
205 pr_debug("Couldn't read a build-id in %s\n", filename);
206 return -1;
207 }
208
209 build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
210 err = build_id_cache__remove_s(sbuild_id);
211 pr_debug("Removing %s %s: %s\n", sbuild_id, filename,
212 err ? "FAIL" : "Ok");
213
214 return err;
215}
216
217static int build_id_cache__purge_path(const char *pathname, struct nsinfo *nsi)
218{
219 struct strlist *list;
220 struct str_node *pos;
221 int err;
222
223 err = build_id_cache__list_build_ids(pathname, nsi, &list);
224 if (err)
225 goto out;
226
227 strlist__for_each_entry(pos, list) {
228 err = build_id_cache__remove_s(pos->s);
229 pr_debug("Removing %s %s: %s\n", pos->s, pathname,
230 err ? "FAIL" : "Ok");
231 if (err)
232 break;
233 }
234 strlist__delete(list);
235
236out:
237 pr_debug("Purging %s: %s\n", pathname, err ? "FAIL" : "Ok");
238
239 return err;
240}
241
242static bool dso__missing_buildid_cache(struct dso *dso, int parm __maybe_unused)
243{
244 char filename[PATH_MAX];
245 u8 build_id[BUILD_ID_SIZE];
246
247 if (dso__build_id_filename(dso, filename, sizeof(filename), false) &&
248 filename__read_build_id(filename, build_id,
249 sizeof(build_id)) != sizeof(build_id)) {
250 if (errno == ENOENT)
251 return false;
252
253 pr_warning("Problems with %s file, consider removing it from the cache\n",
254 filename);
255 } else if (memcmp(dso->build_id, build_id, sizeof(dso->build_id))) {
256 pr_warning("Problems with %s file, consider removing it from the cache\n",
257 filename);
258 }
259
260 return true;
261}
262
263static int build_id_cache__fprintf_missing(struct perf_session *session, FILE *fp)
264{
265 perf_session__fprintf_dsos_buildid(session, fp, dso__missing_buildid_cache, 0);
266 return 0;
267}
268
269static int build_id_cache__update_file(const char *filename, struct nsinfo *nsi)
270{
271 u8 build_id[BUILD_ID_SIZE];
272 char sbuild_id[SBUILD_ID_SIZE];
273 struct nscookie nsc;
274
275 int err;
276
277 nsinfo__mountns_enter(nsi, &nsc);
278 err = filename__read_build_id(filename, &build_id, sizeof(build_id));
279 nsinfo__mountns_exit(&nsc);
280 if (err < 0) {
281 pr_debug("Couldn't read a build-id in %s\n", filename);
282 return -1;
283 }
284 err = 0;
285
286 build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
287 if (build_id_cache__cached(sbuild_id))
288 err = build_id_cache__remove_s(sbuild_id);
289
290 if (!err)
291 err = build_id_cache__add_s(sbuild_id, filename, nsi, false,
292 false);
293
294 pr_debug("Updating %s %s: %s\n", sbuild_id, filename,
295 err ? "FAIL" : "Ok");
296
297 return err;
298}
299
300int cmd_buildid_cache(int argc, const char **argv)
301{
302 struct strlist *list;
303 struct str_node *pos;
304 int ret = 0;
305 int ns_id = -1;
306 bool force = false;
307 char const *add_name_list_str = NULL,
308 *remove_name_list_str = NULL,
309 *purge_name_list_str = NULL,
310 *missing_filename = NULL,
311 *update_name_list_str = NULL,
312 *kcore_filename = NULL;
313 char sbuf[STRERR_BUFSIZE];
314
315 struct perf_data_file file = {
316 .mode = PERF_DATA_MODE_READ,
317 };
318 struct perf_session *session = NULL;
319 struct nsinfo *nsi = NULL;
320
321 const struct option buildid_cache_options[] = {
322 OPT_STRING('a', "add", &add_name_list_str,
323 "file list", "file(s) to add"),
324 OPT_STRING('k', "kcore", &kcore_filename,
325 "file", "kcore file to add"),
326 OPT_STRING('r', "remove", &remove_name_list_str, "file list",
327 "file(s) to remove"),
328 OPT_STRING('p', "purge", &purge_name_list_str, "path list",
329 "path(s) to remove (remove old caches too)"),
330 OPT_STRING('M', "missing", &missing_filename, "file",
331 "to find missing build ids in the cache"),
332 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
333 OPT_STRING('u', "update", &update_name_list_str, "file list",
334 "file(s) to update"),
335 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
336 OPT_INTEGER(0, "target-ns", &ns_id, "target pid for namespace context"),
337 OPT_END()
338 };
339 const char * const buildid_cache_usage[] = {
340 "perf buildid-cache [<options>]",
341 NULL
342 };
343
344 argc = parse_options(argc, argv, buildid_cache_options,
345 buildid_cache_usage, 0);
346
347 if (argc || (!add_name_list_str && !kcore_filename &&
348 !remove_name_list_str && !purge_name_list_str &&
349 !missing_filename && !update_name_list_str))
350 usage_with_options(buildid_cache_usage, buildid_cache_options);
351
352 if (ns_id > 0)
353 nsi = nsinfo__new(ns_id);
354
355 if (missing_filename) {
356 file.path = missing_filename;
357 file.force = force;
358
359 session = perf_session__new(&file, false, NULL);
360 if (session == NULL)
361 return -1;
362 }
363
364 if (symbol__init(session ? &session->header.env : NULL) < 0)
365 goto out;
366
367 setup_pager();
368
369 if (add_name_list_str) {
370 list = strlist__new(add_name_list_str, NULL);
371 if (list) {
372 strlist__for_each_entry(pos, list)
373 if (build_id_cache__add_file(pos->s, nsi)) {
374 if (errno == EEXIST) {
375 pr_debug("%s already in the cache\n",
376 pos->s);
377 continue;
378 }
379 pr_warning("Couldn't add %s: %s\n",
380 pos->s, str_error_r(errno, sbuf, sizeof(sbuf)));
381 }
382
383 strlist__delete(list);
384 }
385 }
386
387 if (remove_name_list_str) {
388 list = strlist__new(remove_name_list_str, NULL);
389 if (list) {
390 strlist__for_each_entry(pos, list)
391 if (build_id_cache__remove_file(pos->s, nsi)) {
392 if (errno == ENOENT) {
393 pr_debug("%s wasn't in the cache\n",
394 pos->s);
395 continue;
396 }
397 pr_warning("Couldn't remove %s: %s\n",
398 pos->s, str_error_r(errno, sbuf, sizeof(sbuf)));
399 }
400
401 strlist__delete(list);
402 }
403 }
404
405 if (purge_name_list_str) {
406 list = strlist__new(purge_name_list_str, NULL);
407 if (list) {
408 strlist__for_each_entry(pos, list)
409 if (build_id_cache__purge_path(pos->s, nsi)) {
410 if (errno == ENOENT) {
411 pr_debug("%s wasn't in the cache\n",
412 pos->s);
413 continue;
414 }
415 pr_warning("Couldn't remove %s: %s\n",
416 pos->s, str_error_r(errno, sbuf, sizeof(sbuf)));
417 }
418
419 strlist__delete(list);
420 }
421 }
422
423 if (missing_filename)
424 ret = build_id_cache__fprintf_missing(session, stdout);
425
426 if (update_name_list_str) {
427 list = strlist__new(update_name_list_str, NULL);
428 if (list) {
429 strlist__for_each_entry(pos, list)
430 if (build_id_cache__update_file(pos->s, nsi)) {
431 if (errno == ENOENT) {
432 pr_debug("%s wasn't in the cache\n",
433 pos->s);
434 continue;
435 }
436 pr_warning("Couldn't update %s: %s\n",
437 pos->s, str_error_r(errno, sbuf, sizeof(sbuf)));
438 }
439
440 strlist__delete(list);
441 }
442 }
443
444 if (kcore_filename && build_id_cache__add_kcore(kcore_filename, force))
445 pr_warning("Couldn't add %s\n", kcore_filename);
446
447out:
448 perf_session__delete(session);
449 nsinfo__zput(nsi);
450
451 return ret;
452}
453
