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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
ef12a141 ACM |
2 | /* |
3 | * builtin-buildid-cache.c | |
4 | * | |
5 | * Builtin buildid-cache command: Manages build-id cache | |
6 | * | |
7 | * Copyright (C) 2010, Red Hat Inc. | |
8 | * Copyright (C) 2010, Arnaldo Carvalho de Melo <acme@redhat.com> | |
9 | */ | |
fc1b691d AH |
10 | #include <sys/types.h> |
11 | #include <sys/time.h> | |
12 | #include <time.h> | |
13 | #include <dirent.h> | |
a43783ae | 14 | #include <errno.h> |
fc1b691d | 15 | #include <unistd.h> |
ef12a141 ACM |
16 | #include "builtin.h" |
17 | #include "perf.h" | |
f045b8c4 | 18 | #include "namespaces.h" |
ef12a141 ACM |
19 | #include "util/cache.h" |
20 | #include "util/debug.h" | |
21 | #include "util/header.h" | |
4b6ab94e | 22 | #include <subcmd/parse-options.h> |
ef12a141 | 23 | #include "util/strlist.h" |
ebb296c2 | 24 | #include "util/build-id.h" |
fbb6976c | 25 | #include "util/session.h" |
4383db88 | 26 | #include "util/symbol.h" |
c5e4027e | 27 | #include "util/time-utils.h" |
ef12a141 | 28 | |
fc1b691d AH |
29 | static int build_id_cache__kcore_buildid(const char *proc_dir, char *sbuildid) |
30 | { | |
31 | char root_dir[PATH_MAX]; | |
fc1b691d AH |
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'; | |
0b5a7935 | 40 | return sysfs__sprintf_build_id(root_dir, sbuildid); |
fc1b691d AH |
41 | } |
42 | ||
43 | static int build_id_cache__kcore_dir(char *dir, size_t sz) | |
44 | { | |
37b20151 | 45 | return fetch_current_timestamp(dir, sz); |
fc1b691d AH |
46 | } |
47 | ||
d3b70220 AH |
48 | static 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; | |
b843f62a | 54 | int i, err = -1; |
d3b70220 AH |
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++) { | |
b843f62a ACM |
60 | err = kallsyms__get_function_start(from, name, &addr1); |
61 | if (!err) | |
d3b70220 AH |
62 | break; |
63 | } | |
64 | ||
b843f62a ACM |
65 | if (err) |
66 | return false; | |
67 | ||
68 | if (kallsyms__get_function_start(to, name, &addr2)) | |
69 | return false; | |
d3b70220 AH |
70 | |
71 | return addr1 == addr2; | |
72 | } | |
73 | ||
fc1b691d AH |
74 | static 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]; | |
d3b70220 | 79 | char to_subdir[PATH_MAX]; |
fc1b691d AH |
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); | |
d3b70220 AH |
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); | |
fc1b691d AH |
103 | ret = 0; |
104 | break; | |
105 | } | |
106 | } | |
107 | ||
108 | closedir(d); | |
109 | ||
110 | return ret; | |
111 | } | |
112 | ||
e35f7362 | 113 | static int build_id_cache__add_kcore(const char *filename, bool force) |
fc1b691d | 114 | { |
d77fac7f | 115 | char dir[32], sbuildid[SBUILD_ID_SIZE]; |
fc1b691d AH |
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 | ||
0b5a7935 | 126 | if (build_id_cache__kcore_buildid(from_dir, sbuildid) < 0) |
fc1b691d AH |
127 | return -1; |
128 | ||
0a77582f MH |
129 | scnprintf(to_dir, sizeof(to_dir), "%s/%s/%s", |
130 | buildid_dir, DSO__NAME_KCORE, sbuildid); | |
fc1b691d | 131 | |
5173fbb8 AH |
132 | if (!force && |
133 | !build_id_cache__kcore_existing(from_dir, to_dir, sizeof(to_dir))) { | |
fc1b691d AH |
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 | ||
0a77582f MH |
141 | scnprintf(to_dir, sizeof(to_dir), "%s/%s/%s/%s", |
142 | buildid_dir, DSO__NAME_KCORE, sbuildid, dir); | |
fc1b691d AH |
143 | |
144 | if (mkdir_p(to_dir, 0755)) | |
145 | return -1; | |
146 | ||
147 | if (kcore_copy(from_dir, to_dir)) { | |
148 | /* Remove YYYYmmddHHMMSShh directory */ | |
149 | if (!rmdir(to_dir)) { | |
150 | p = strrchr(to_dir, '/'); | |
151 | if (p) | |
152 | *p = '\0'; | |
153 | /* Try to remove buildid directory */ | |
154 | if (!rmdir(to_dir)) { | |
155 | p = strrchr(to_dir, '/'); | |
156 | if (p) | |
157 | *p = '\0'; | |
158 | /* Try to remove [kernel.kcore] directory */ | |
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 | ||
f045b8c4 | 170 | static int build_id_cache__add_file(const char *filename, struct nsinfo *nsi) |
ef12a141 | 171 | { |
d77fac7f | 172 | char sbuild_id[SBUILD_ID_SIZE]; |
ef12a141 ACM |
173 | u8 build_id[BUILD_ID_SIZE]; |
174 | int err; | |
f045b8c4 | 175 | struct nscookie nsc; |
ef12a141 | 176 | |
f045b8c4 KJ |
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) { | |
ef12a141 ACM |
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); | |
f045b8c4 | 186 | err = build_id_cache__add_s(sbuild_id, filename, nsi, |
7dbf4dcf | 187 | false, false); |
cc169c7c MH |
188 | pr_debug("Adding %s %s: %s\n", sbuild_id, filename, |
189 | err ? "FAIL" : "Ok"); | |
ef12a141 ACM |
190 | return err; |
191 | } | |
192 | ||
f045b8c4 | 193 | static int build_id_cache__remove_file(const char *filename, struct nsinfo *nsi) |
ef12a141 ACM |
194 | { |
195 | u8 build_id[BUILD_ID_SIZE]; | |
d77fac7f | 196 | char sbuild_id[SBUILD_ID_SIZE]; |
f045b8c4 | 197 | struct nscookie nsc; |
ef12a141 ACM |
198 | |
199 | int err; | |
200 | ||
f045b8c4 KJ |
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) { | |
ef12a141 ACM |
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); | |
e35f7362 | 210 | err = build_id_cache__remove_s(sbuild_id); |
cc169c7c MH |
211 | pr_debug("Removing %s %s: %s\n", sbuild_id, filename, |
212 | err ? "FAIL" : "Ok"); | |
ef12a141 ACM |
213 | |
214 | return err; | |
215 | } | |
216 | ||
f045b8c4 | 217 | static int build_id_cache__purge_path(const char *pathname, struct nsinfo *nsi) |
8d8c8e4c MH |
218 | { |
219 | struct strlist *list; | |
220 | struct str_node *pos; | |
221 | int err; | |
222 | ||
f045b8c4 | 223 | err = build_id_cache__list_build_ids(pathname, nsi, &list); |
8d8c8e4c MH |
224 | if (err) |
225 | goto out; | |
226 | ||
602a1f4d | 227 | strlist__for_each_entry(pos, list) { |
8d8c8e4c | 228 | err = build_id_cache__remove_s(pos->s); |
cc169c7c MH |
229 | pr_debug("Removing %s %s: %s\n", pos->s, pathname, |
230 | err ? "FAIL" : "Ok"); | |
8d8c8e4c MH |
231 | if (err) |
232 | break; | |
233 | } | |
234 | strlist__delete(list); | |
235 | ||
236 | out: | |
cc169c7c | 237 | pr_debug("Purging %s: %s\n", pathname, err ? "FAIL" : "Ok"); |
8d8c8e4c MH |
238 | |
239 | return err; | |
240 | } | |
241 | ||
fbb6976c ACM |
242 | static 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 | ||
d2396999 | 247 | if (dso__build_id_filename(dso, filename, sizeof(filename), false) && |
fbb6976c ACM |
248 | filename__read_build_id(filename, build_id, |
249 | sizeof(build_id)) != sizeof(build_id)) { | |
250 | if (errno == ENOENT) | |
251 | return false; | |
252 | ||
48000a1a | 253 | pr_warning("Problems with %s file, consider removing it from the cache\n", |
fbb6976c ACM |
254 | filename); |
255 | } else if (memcmp(dso->build_id, build_id, sizeof(dso->build_id))) { | |
48000a1a | 256 | pr_warning("Problems with %s file, consider removing it from the cache\n", |
fbb6976c ACM |
257 | filename); |
258 | } | |
259 | ||
260 | return true; | |
261 | } | |
262 | ||
e3ed75bb | 263 | static int build_id_cache__fprintf_missing(struct perf_session *session, FILE *fp) |
fbb6976c | 264 | { |
fbb6976c | 265 | perf_session__fprintf_dsos_buildid(session, fp, dso__missing_buildid_cache, 0); |
fbb6976c ACM |
266 | return 0; |
267 | } | |
268 | ||
f045b8c4 | 269 | static int build_id_cache__update_file(const char *filename, struct nsinfo *nsi) |
eeb49845 NK |
270 | { |
271 | u8 build_id[BUILD_ID_SIZE]; | |
d77fac7f | 272 | char sbuild_id[SBUILD_ID_SIZE]; |
f045b8c4 | 273 | struct nscookie nsc; |
eeb49845 | 274 | |
f045b8c4 | 275 | int err; |
eeb49845 | 276 | |
f045b8c4 KJ |
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) { | |
eeb49845 NK |
281 | pr_debug("Couldn't read a build-id in %s\n", filename); |
282 | return -1; | |
283 | } | |
f045b8c4 | 284 | err = 0; |
eeb49845 NK |
285 | |
286 | build_id__sprintf(build_id, sizeof(build_id), sbuild_id); | |
a50d11a1 MH |
287 | if (build_id_cache__cached(sbuild_id)) |
288 | err = build_id_cache__remove_s(sbuild_id); | |
289 | ||
e35f7362 | 290 | if (!err) |
f045b8c4 KJ |
291 | err = build_id_cache__add_s(sbuild_id, filename, nsi, false, |
292 | false); | |
e35f7362 | 293 | |
cc169c7c MH |
294 | pr_debug("Updating %s %s: %s\n", sbuild_id, filename, |
295 | err ? "FAIL" : "Ok"); | |
eeb49845 NK |
296 | |
297 | return err; | |
298 | } | |
299 | ||
b0ad8ea6 | 300 | int cmd_buildid_cache(int argc, const char **argv) |
ef12a141 ACM |
301 | { |
302 | struct strlist *list; | |
303 | struct str_node *pos; | |
fbb6976c | 304 | int ret = 0; |
f045b8c4 | 305 | int ns_id = -1; |
fbb6976c | 306 | bool force = false; |
472cc83c | 307 | char const *add_name_list_str = NULL, |
fbb6976c | 308 | *remove_name_list_str = NULL, |
8d8c8e4c | 309 | *purge_name_list_str = NULL, |
eeb49845 | 310 | *missing_filename = NULL, |
fc1b691d | 311 | *update_name_list_str = NULL, |
eec5a688 | 312 | *kcore_filename = NULL; |
340481ad | 313 | char sbuf[STRERR_BUFSIZE]; |
eeb49845 | 314 | |
8ceb41d7 | 315 | struct perf_data data = { |
e3ed75bb NK |
316 | .mode = PERF_DATA_MODE_READ, |
317 | }; | |
318 | struct perf_session *session = NULL; | |
f045b8c4 | 319 | struct nsinfo *nsi = NULL; |
e3ed75bb | 320 | |
472cc83c ACM |
321 | const struct option buildid_cache_options[] = { |
322 | OPT_STRING('a', "add", &add_name_list_str, | |
323 | "file list", "file(s) to add"), | |
fc1b691d AH |
324 | OPT_STRING('k', "kcore", &kcore_filename, |
325 | "file", "kcore file to add"), | |
472cc83c ACM |
326 | OPT_STRING('r', "remove", &remove_name_list_str, "file list", |
327 | "file(s) to remove"), | |
8d8c8e4c MH |
328 | OPT_STRING('p', "purge", &purge_name_list_str, "path list", |
329 | "path(s) to remove (remove old caches too)"), | |
fbb6976c ACM |
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"), | |
eeb49845 NK |
333 | OPT_STRING('u', "update", &update_name_list_str, "file list", |
334 | "file(s) to update"), | |
472cc83c | 335 | OPT_INCR('v', "verbose", &verbose, "be more verbose"), |
f045b8c4 | 336 | OPT_INTEGER(0, "target-ns", &ns_id, "target pid for namespace context"), |
472cc83c ACM |
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 | ||
0497d0a8 MH |
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 | ||
f045b8c4 KJ |
352 | if (ns_id > 0) |
353 | nsi = nsinfo__new(ns_id); | |
354 | ||
e3ed75bb | 355 | if (missing_filename) { |
eae8ad80 JO |
356 | data.file.path = missing_filename; |
357 | data.force = force; | |
e3ed75bb | 358 | |
8ceb41d7 | 359 | session = perf_session__new(&data, false, NULL); |
e3ed75bb NK |
360 | if (session == NULL) |
361 | return -1; | |
362 | } | |
363 | ||
0a7e6d1b | 364 | if (symbol__init(session ? &session->header.env : NULL) < 0) |
e3ed75bb | 365 | goto out; |
472cc83c ACM |
366 | |
367 | setup_pager(); | |
ef12a141 | 368 | |
ef12a141 | 369 | if (add_name_list_str) { |
4a77e218 | 370 | list = strlist__new(add_name_list_str, NULL); |
ef12a141 | 371 | if (list) { |
602a1f4d | 372 | strlist__for_each_entry(pos, list) |
f045b8c4 | 373 | if (build_id_cache__add_file(pos->s, nsi)) { |
ef12a141 ACM |
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", | |
c8b5f2c9 | 380 | pos->s, str_error_r(errno, sbuf, sizeof(sbuf))); |
ef12a141 ACM |
381 | } |
382 | ||
383 | strlist__delete(list); | |
384 | } | |
385 | } | |
386 | ||
387 | if (remove_name_list_str) { | |
4a77e218 | 388 | list = strlist__new(remove_name_list_str, NULL); |
ef12a141 | 389 | if (list) { |
602a1f4d | 390 | strlist__for_each_entry(pos, list) |
f045b8c4 | 391 | if (build_id_cache__remove_file(pos->s, nsi)) { |
ef12a141 ACM |
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", | |
c8b5f2c9 | 398 | pos->s, str_error_r(errno, sbuf, sizeof(sbuf))); |
ef12a141 ACM |
399 | } |
400 | ||
401 | strlist__delete(list); | |
402 | } | |
403 | } | |
404 | ||
8d8c8e4c | 405 | if (purge_name_list_str) { |
4a77e218 | 406 | list = strlist__new(purge_name_list_str, NULL); |
8d8c8e4c | 407 | if (list) { |
602a1f4d | 408 | strlist__for_each_entry(pos, list) |
f045b8c4 | 409 | if (build_id_cache__purge_path(pos->s, nsi)) { |
8d8c8e4c MH |
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", | |
c8b5f2c9 | 416 | pos->s, str_error_r(errno, sbuf, sizeof(sbuf))); |
8d8c8e4c MH |
417 | } |
418 | ||
419 | strlist__delete(list); | |
420 | } | |
421 | } | |
422 | ||
fbb6976c | 423 | if (missing_filename) |
e3ed75bb | 424 | ret = build_id_cache__fprintf_missing(session, stdout); |
fbb6976c | 425 | |
eeb49845 | 426 | if (update_name_list_str) { |
4a77e218 | 427 | list = strlist__new(update_name_list_str, NULL); |
eeb49845 | 428 | if (list) { |
602a1f4d | 429 | strlist__for_each_entry(pos, list) |
f045b8c4 | 430 | if (build_id_cache__update_file(pos->s, nsi)) { |
eeb49845 NK |
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", | |
c8b5f2c9 | 437 | pos->s, str_error_r(errno, sbuf, sizeof(sbuf))); |
eeb49845 NK |
438 | } |
439 | ||
440 | strlist__delete(list); | |
441 | } | |
442 | } | |
443 | ||
e35f7362 | 444 | if (kcore_filename && build_id_cache__add_kcore(kcore_filename, force)) |
fc1b691d AH |
445 | pr_warning("Couldn't add %s\n", kcore_filename); |
446 | ||
e3ed75bb | 447 | out: |
e1446551 | 448 | perf_session__delete(session); |
f045b8c4 | 449 | nsinfo__zput(nsi); |
e3ed75bb | 450 | |
fbb6976c | 451 | return ret; |
ef12a141 | 452 | } |