1// SPDX-License-Identifier: GPL-2.0
  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 */
 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 "namespaces.h"
 
 18#include "util/debug.h"
 19#include "util/header.h"
 20#include <subcmd/pager.h>
 21#include <subcmd/parse-options.h>
 22#include "util/strlist.h"
 23#include "util/build-id.h"
 24#include "util/session.h"
 25#include "util/dso.h"
 26#include "util/symbol.h"
 27#include "util/time-utils.h"
 28#include "util/util.h"
 29#include "util/probe-file.h"
 30#include "util/config.h"
 31#include <linux/string.h>
 32#include <linux/err.h>
 33
 34static int build_id_cache__kcore_buildid(const char *proc_dir, char *sbuildid)
 35{
 36	char root_dir[PATH_MAX];
 37	char *p;
 38
 39	strlcpy(root_dir, proc_dir, sizeof(root_dir));
 40
 41	p = strrchr(root_dir, '/');
 42	if (!p)
 43		return -1;
 44	*p = '\0';
 45	return sysfs__sprintf_build_id(root_dir, sbuildid);
 46}
 47
 48static int build_id_cache__kcore_dir(char *dir, size_t sz)
 49{
 50	return fetch_current_timestamp(dir, sz);
 51}
 52
 53static bool same_kallsyms_reloc(const char *from_dir, char *to_dir)
 54{
 55	char from[PATH_MAX];
 56	char to[PATH_MAX];
 57	const char *name;
 58	u64 addr1 = 0, addr2 = 0;
 59	int i, err = -1;
 60
 61	scnprintf(from, sizeof(from), "%s/kallsyms", from_dir);
 62	scnprintf(to, sizeof(to), "%s/kallsyms", to_dir);
 63
 64	for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) {
 65		err = kallsyms__get_function_start(from, name, &addr1);
 66		if (!err)
 67			break;
 68	}
 69
 70	if (err)
 71		return false;
 72
 73	if (kallsyms__get_function_start(to, name, &addr2))
 74		return false;
 75
 76	return addr1 == addr2;
 77}
 78
 79static int build_id_cache__kcore_existing(const char *from_dir, char *to_dir,
 80					  size_t to_dir_sz)
 81{
 82	char from[PATH_MAX];
 83	char to[PATH_MAX];
 84	char to_subdir[PATH_MAX];
 85	struct dirent *dent;
 86	int ret = -1;
 87	DIR *d;
 88
 89	d = opendir(to_dir);
 90	if (!d)
 91		return -1;
 92
 93	scnprintf(from, sizeof(from), "%s/modules", from_dir);
 94
 95	while (1) {
 96		dent = readdir(d);
 97		if (!dent)
 98			break;
 99		if (dent->d_type != DT_DIR)
100			continue;
101		scnprintf(to, sizeof(to), "%s/%s/modules", to_dir,
102			  dent->d_name);
103		scnprintf(to_subdir, sizeof(to_subdir), "%s/%s",
104			  to_dir, dent->d_name);
105		if (!compare_proc_modules(from, to) &&
106		    same_kallsyms_reloc(from_dir, to_subdir)) {
107			strlcpy(to_dir, to_subdir, to_dir_sz);
108			ret = 0;
109			break;
110		}
111	}
112
113	closedir(d);
114
115	return ret;
116}
117
118static int build_id_cache__add_kcore(const char *filename, bool force)
119{
120	char dir[32], sbuildid[SBUILD_ID_SIZE];
121	char from_dir[PATH_MAX], to_dir[PATH_MAX];
122	char *p;
123
124	strlcpy(from_dir, filename, sizeof(from_dir));
125
126	p = strrchr(from_dir, '/');
127	if (!p || strcmp(p + 1, "kcore"))
128		return -1;
129	*p = '\0';
130
131	if (build_id_cache__kcore_buildid(from_dir, sbuildid) < 0)
132		return -1;
133
134	scnprintf(to_dir, sizeof(to_dir), "%s/%s/%s",
135		  buildid_dir, DSO__NAME_KCORE, sbuildid);
136
137	if (!force &&
138	    !build_id_cache__kcore_existing(from_dir, to_dir, sizeof(to_dir))) {
139		pr_debug("same kcore found in %s\n", to_dir);
140		return 0;
141	}
142
143	if (build_id_cache__kcore_dir(dir, sizeof(dir)))
144		return -1;
145
146	scnprintf(to_dir, sizeof(to_dir), "%s/%s/%s/%s",
147		  buildid_dir, DSO__NAME_KCORE, sbuildid, dir);
148
149	if (mkdir_p(to_dir, 0755))
150		return -1;
151
152	if (kcore_copy(from_dir, to_dir)) {
153		/* Remove YYYYmmddHHMMSShh directory */
154		if (!rmdir(to_dir)) {
155			p = strrchr(to_dir, '/');
156			if (p)
157				*p = '\0';
158			/* Try to remove buildid directory */
159			if (!rmdir(to_dir)) {
160				p = strrchr(to_dir, '/');
161				if (p)
162					*p = '\0';
163				/* Try to remove [kernel.kcore] directory */
164				rmdir(to_dir);
165			}
166		}
167		return -1;
168	}
169
170	pr_debug("kcore added to build-id cache directory %s\n", to_dir);
171
172	return 0;
173}
174
175static int build_id_cache__add_file(const char *filename, struct nsinfo *nsi)
176{
177	char sbuild_id[SBUILD_ID_SIZE];
178	struct build_id bid;
179	int err;
180	struct nscookie nsc;
181
182	nsinfo__mountns_enter(nsi, &nsc);
183	err = filename__read_build_id(filename, &bid);
184	nsinfo__mountns_exit(&nsc);
185	if (err < 0) {
186		pr_debug("Couldn't read a build-id in %s\n", filename);
187		return -1;
188	}
189
190	build_id__sprintf(&bid, sbuild_id);
191	err = build_id_cache__add_s(sbuild_id, filename, nsi,
192				    false, false);
193	pr_debug("Adding %s %s: %s\n", sbuild_id, filename,
194		 err ? "FAIL" : "Ok");
195	return err;
196}
197
198static int build_id_cache__remove_file(const char *filename, struct nsinfo *nsi)
199{
 
200	char sbuild_id[SBUILD_ID_SIZE];
201	struct build_id bid;
202	struct nscookie nsc;
203
204	int err;
205
206	nsinfo__mountns_enter(nsi, &nsc);
207	err = filename__read_build_id(filename, &bid);
208	nsinfo__mountns_exit(&nsc);
209	if (err < 0) {
210		pr_debug("Couldn't read a build-id in %s\n", filename);
211		return -1;
212	}
213
214	build_id__sprintf(&bid, sbuild_id);
215	err = build_id_cache__remove_s(sbuild_id);
216	pr_debug("Removing %s %s: %s\n", sbuild_id, filename,
217		 err ? "FAIL" : "Ok");
218
219	return err;
220}
221
222static int build_id_cache__purge_path(const char *pathname, struct nsinfo *nsi)
223{
224	struct strlist *list;
225	struct str_node *pos;
226	int err;
227
228	err = build_id_cache__list_build_ids(pathname, nsi, &list);
229	if (err)
230		goto out;
231
232	strlist__for_each_entry(pos, list) {
233		err = build_id_cache__remove_s(pos->s);
234		pr_debug("Removing %s %s: %s\n", pos->s, pathname,
235			 err ? "FAIL" : "Ok");
236		if (err)
237			break;
238	}
239	strlist__delete(list);
240
241out:
242	pr_debug("Purging %s: %s\n", pathname, err ? "FAIL" : "Ok");
243
244	return err;
245}
246
247static int build_id_cache__purge_all(void)
248{
249	struct strlist *list;
250	struct str_node *pos;
251	int err = 0;
252	char *buf;
253
254	list = build_id_cache__list_all(false);
255	if (!list) {
256		pr_debug("Failed to get buildids: -%d\n", errno);
257		return -EINVAL;
258	}
259
260	strlist__for_each_entry(pos, list) {
261		buf = build_id_cache__origname(pos->s);
262		err = build_id_cache__remove_s(pos->s);
263		pr_debug("Removing %s (%s): %s\n", buf, pos->s,
264			 err ? "FAIL" : "Ok");
265		free(buf);
266		if (err)
267			break;
268	}
269	strlist__delete(list);
270
271	pr_debug("Purged all: %s\n", err ? "FAIL" : "Ok");
272	return err;
273}
274
275static bool dso__missing_buildid_cache(struct dso *dso, int parm __maybe_unused)
276{
277	char filename[PATH_MAX];
278	struct build_id bid;
279
280	if (dso__build_id_filename(dso, filename, sizeof(filename), false) &&
281	    filename__read_build_id(filename, &bid) == -1) {
 
282		if (errno == ENOENT)
283			return false;
284
285		pr_warning("Problems with %s file, consider removing it from the cache\n",
286			   filename);
287	} else if (memcmp(dso->bid.data, bid.data, bid.size)) {
288		pr_warning("Problems with %s file, consider removing it from the cache\n",
289			   filename);
290	}
291
292	return true;
293}
294
295static int build_id_cache__fprintf_missing(struct perf_session *session, FILE *fp)
296{
297	perf_session__fprintf_dsos_buildid(session, fp, dso__missing_buildid_cache, 0);
298	return 0;
299}
300
301static int build_id_cache__update_file(const char *filename, struct nsinfo *nsi)
302{
 
303	char sbuild_id[SBUILD_ID_SIZE];
304	struct build_id bid;
305	struct nscookie nsc;
306
307	int err;
308
309	nsinfo__mountns_enter(nsi, &nsc);
310	err = filename__read_build_id(filename, &bid);
311	nsinfo__mountns_exit(&nsc);
312	if (err < 0) {
313		pr_debug("Couldn't read a build-id in %s\n", filename);
314		return -1;
315	}
316	err = 0;
317
318	build_id__sprintf(&bid, sbuild_id);
319	if (build_id_cache__cached(sbuild_id))
320		err = build_id_cache__remove_s(sbuild_id);
321
322	if (!err)
323		err = build_id_cache__add_s(sbuild_id, filename, nsi, false,
324					    false);
325
326	pr_debug("Updating %s %s: %s\n", sbuild_id, filename,
327		 err ? "FAIL" : "Ok");
328
329	return err;
330}
331
332static int build_id_cache__show_all(void)
333{
334	struct strlist *bidlist;
335	struct str_node *nd;
336	char *buf;
337
338	bidlist = build_id_cache__list_all(true);
339	if (!bidlist) {
340		pr_debug("Failed to get buildids: -%d\n", errno);
341		return -1;
342	}
343	strlist__for_each_entry(nd, bidlist) {
344		buf = build_id_cache__origname(nd->s);
345		fprintf(stdout, "%s %s\n", nd->s, buf);
346		free(buf);
347	}
348	strlist__delete(bidlist);
349	return 0;
350}
351
352static int perf_buildid_cache_config(const char *var, const char *value, void *cb)
353{
354	struct perf_debuginfod *di = cb;
355
356	if (!strcmp(var, "buildid-cache.debuginfod")) {
357		di->urls = strdup(value);
358		if (!di->urls)
359			return -ENOMEM;
360		di->set = true;
361	}
362
363	return 0;
364}
365
366int cmd_buildid_cache(int argc, const char **argv)
367{
368	struct strlist *list;
369	struct str_node *pos;
370	int ret, ns_id = -1;
 
371	bool force = false;
372	bool list_files = false;
373	bool opts_flag = false;
374	bool purge_all = false;
375	char const *add_name_list_str = NULL,
376		   *remove_name_list_str = NULL,
377		   *purge_name_list_str = NULL,
378		   *missing_filename = NULL,
379		   *update_name_list_str = NULL,
380		   *kcore_filename = NULL;
381	struct perf_debuginfod debuginfod = { };
382	char sbuf[STRERR_BUFSIZE];
383
384	struct perf_data data = {
385		.mode  = PERF_DATA_MODE_READ,
386	};
387	struct perf_session *session = NULL;
388	struct nsinfo *nsi = NULL;
389
390	const struct option buildid_cache_options[] = {
391	OPT_STRING('a', "add", &add_name_list_str,
392		   "file list", "file(s) to add"),
393	OPT_STRING('k', "kcore", &kcore_filename,
394		   "file", "kcore file to add"),
395	OPT_STRING('r', "remove", &remove_name_list_str, "file list",
396		    "file(s) to remove"),
397	OPT_STRING('p', "purge", &purge_name_list_str, "file list",
398		    "file(s) to remove (remove old caches too)"),
399	OPT_BOOLEAN('P', "purge-all", &purge_all, "purge all cached files"),
400	OPT_BOOLEAN('l', "list", &list_files, "list all cached files"),
401	OPT_STRING('M', "missing", &missing_filename, "file",
402		   "to find missing build ids in the cache"),
403	OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
404	OPT_STRING('u', "update", &update_name_list_str, "file list",
405		    "file(s) to update"),
406	OPT_STRING_OPTARG_SET(0, "debuginfod", &debuginfod.urls,
407			&debuginfod.set, "debuginfod urls",
408			"Enable debuginfod data retrieval from DEBUGINFOD_URLS or specified urls",
409			"system"),
410	OPT_INCR('v', "verbose", &verbose, "be more verbose"),
411	OPT_INTEGER(0, "target-ns", &ns_id, "target pid for namespace context"),
412	OPT_END()
413	};
414	const char * const buildid_cache_usage[] = {
415		"perf buildid-cache [<options>]",
416		NULL
417	};
418
419	ret = perf_config(perf_buildid_cache_config, &debuginfod);
420	if (ret)
421		return ret;
422
423	argc = parse_options(argc, argv, buildid_cache_options,
424			     buildid_cache_usage, 0);
425
426	opts_flag = add_name_list_str || kcore_filename ||
427		remove_name_list_str || purge_name_list_str ||
428		missing_filename || update_name_list_str ||
429		purge_all;
430
431	if (argc || !(list_files || opts_flag))
432		usage_with_options(buildid_cache_usage, buildid_cache_options);
433
434	perf_debuginfod_setup(&debuginfod);
435
436	/* -l is exclusive. It can not be used with other options. */
437	if (list_files && opts_flag) {
438		usage_with_options_msg(buildid_cache_usage,
439			buildid_cache_options, "-l is exclusive.\n");
440	}
441
442	if (ns_id > 0)
443		nsi = nsinfo__new(ns_id);
444
445	if (missing_filename) {
446		data.path  = missing_filename;
447		data.force = force;
448
449		session = perf_session__new(&data, NULL);
450		if (IS_ERR(session))
451			return PTR_ERR(session);
452	}
453
454	if (symbol__init(session ? &session->header.env : NULL) < 0)
455		goto out;
456
457	setup_pager();
458
459	if (list_files) {
460		ret = build_id_cache__show_all();
461		goto out;
462	}
463
464	if (add_name_list_str) {
465		list = strlist__new(add_name_list_str, NULL);
466		if (list) {
467			strlist__for_each_entry(pos, list)
468				if (build_id_cache__add_file(pos->s, nsi)) {
469					if (errno == EEXIST) {
470						pr_debug("%s already in the cache\n",
471							 pos->s);
472						continue;
473					}
474					pr_warning("Couldn't add %s: %s\n",
475						   pos->s, str_error_r(errno, sbuf, sizeof(sbuf)));
476				}
477
478			strlist__delete(list);
479		}
480	}
481
482	if (remove_name_list_str) {
483		list = strlist__new(remove_name_list_str, NULL);
484		if (list) {
485			strlist__for_each_entry(pos, list)
486				if (build_id_cache__remove_file(pos->s, nsi)) {
487					if (errno == ENOENT) {
488						pr_debug("%s wasn't in the cache\n",
489							 pos->s);
490						continue;
491					}
492					pr_warning("Couldn't remove %s: %s\n",
493						   pos->s, str_error_r(errno, sbuf, sizeof(sbuf)));
494				}
495
496			strlist__delete(list);
497		}
498	}
499
500	if (purge_name_list_str) {
501		list = strlist__new(purge_name_list_str, NULL);
502		if (list) {
503			strlist__for_each_entry(pos, list)
504				if (build_id_cache__purge_path(pos->s, nsi)) {
505					if (errno == ENOENT) {
506						pr_debug("%s wasn't in the cache\n",
507							 pos->s);
508						continue;
509					}
510					pr_warning("Couldn't remove %s: %s\n",
511						   pos->s, str_error_r(errno, sbuf, sizeof(sbuf)));
512				}
513
514			strlist__delete(list);
515		}
516	}
517
518	if (purge_all) {
519		if (build_id_cache__purge_all()) {
520			pr_warning("Couldn't remove some caches. Error: %s.\n",
521				str_error_r(errno, sbuf, sizeof(sbuf)));
522		}
523	}
524
525	if (missing_filename)
526		ret = build_id_cache__fprintf_missing(session, stdout);
527
528	if (update_name_list_str) {
529		list = strlist__new(update_name_list_str, NULL);
530		if (list) {
531			strlist__for_each_entry(pos, list)
532				if (build_id_cache__update_file(pos->s, nsi)) {
533					if (errno == ENOENT) {
534						pr_debug("%s wasn't in the cache\n",
535							 pos->s);
536						continue;
537					}
538					pr_warning("Couldn't update %s: %s\n",
539						   pos->s, str_error_r(errno, sbuf, sizeof(sbuf)));
540				}
541
542			strlist__delete(list);
543		}
544	}
545
546	if (kcore_filename && build_id_cache__add_kcore(kcore_filename, force))
547		pr_warning("Couldn't add %s\n", kcore_filename);
548
549out:
550	perf_session__delete(session);
551	nsinfo__zput(nsi);
552
553	return ret;
554}

  1// SPDX-License-Identifier: GPL-2.0
  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 */
 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		/* 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
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 data = {
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, "file list",
329		    "file(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		data.file.path = missing_filename;
357		data.force     = force;
358
359		session = perf_session__new(&data, 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}