/* * builtin-buildid-cache.c * * Builtin buildid-cache command: Manages build-id cache * * Copyright (C) 2010, Red Hat Inc. * Copyright (C) 2010, Arnaldo Carvalho de Melo <acme@redhat.com> */ #include <sys/types.h> #include <sys/time.h> #include <time.h> #include <dirent.h> #include <unistd.h> #include "builtin.h" #include "perf.h" #include "util/cache.h" #include "util/debug.h" #include "util/header.h" #include "util/parse-options.h" #include "util/strlist.h" #include "util/build-id.h" #include "util/session.h" #include "util/symbol.h" static int build_id_cache__kcore_buildid(const char *proc_dir, char *sbuildid) { char root_dir[PATH_MAX]; char notes[PATH_MAX]; u8 build_id[BUILD_ID_SIZE]; char *p; strlcpy(root_dir, proc_dir, sizeof(root_dir)); p = strrchr(root_dir, '/'); if (!p) return -1; *p = '\0'; scnprintf(notes, sizeof(notes), "%s/sys/kernel/notes", root_dir); if (sysfs__read_build_id(notes, build_id, sizeof(build_id))) return -1; build_id__sprintf(build_id, sizeof(build_id), sbuildid); return 0; } static int build_id_cache__kcore_dir(char *dir, size_t sz) { struct timeval tv; struct tm tm; char dt[32]; if (gettimeofday(&tv, NULL) || !localtime_r(&tv.tv_sec, &tm)) return -1; if (!strftime(dt, sizeof(dt), "%Y%m%d%H%M%S", &tm)) return -1; scnprintf(dir, sz, "%s%02u", dt, (unsigned)tv.tv_usec / 10000); return 0; } static int build_id_cache__kcore_existing(const char *from_dir, char *to_dir, size_t to_dir_sz) { char from[PATH_MAX]; char to[PATH_MAX]; struct dirent *dent; int ret = -1; DIR *d; d = opendir(to_dir); if (!d) return -1; scnprintf(from, sizeof(from), "%s/modules", from_dir); while (1) { dent = readdir(d); if (!dent) break; if (dent->d_type != DT_DIR) continue; scnprintf(to, sizeof(to), "%s/%s/modules", to_dir, dent->d_name); if (!compare_proc_modules(from, to)) { scnprintf(to, sizeof(to), "%s/%s", to_dir, dent->d_name); strlcpy(to_dir, to, to_dir_sz); ret = 0; break; } } closedir(d); return ret; } static int build_id_cache__add_kcore(const char *filename, const char *debugdir) { char dir[32], sbuildid[BUILD_ID_SIZE * 2 + 1]; char from_dir[PATH_MAX], to_dir[PATH_MAX]; char *p; strlcpy(from_dir, filename, sizeof(from_dir)); p = strrchr(from_dir, '/'); if (!p || strcmp(p + 1, "kcore")) return -1; *p = '\0'; if (build_id_cache__kcore_buildid(from_dir, sbuildid)) return -1; scnprintf(to_dir, sizeof(to_dir), "%s/[kernel.kcore]/%s", debugdir, sbuildid); if (!build_id_cache__kcore_existing(from_dir, to_dir, sizeof(to_dir))) { pr_debug("same kcore found in %s\n", to_dir); return 0; } if (build_id_cache__kcore_dir(dir, sizeof(dir))) return -1; scnprintf(to_dir, sizeof(to_dir), "%s/[kernel.kcore]/%s/%s", debugdir, sbuildid, dir); if (mkdir_p(to_dir, 0755)) return -1; if (kcore_copy(from_dir, to_dir)) { /* Remove YYYYmmddHHMMSShh directory */ if (!rmdir(to_dir)) { p = strrchr(to_dir, '/'); if (p) *p = '\0'; /* Try to remove buildid directory */ if (!rmdir(to_dir)) { p = strrchr(to_dir, '/'); if (p) *p = '\0'; /* Try to remove [kernel.kcore] directory */ rmdir(to_dir); } } return -1; } pr_debug("kcore added to build-id cache directory %s\n", to_dir); return 0; } static int build_id_cache__add_file(const char *filename, const char *debugdir) { char sbuild_id[BUILD_ID_SIZE * 2 + 1]; u8 build_id[BUILD_ID_SIZE]; int err; if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) { pr_debug("Couldn't read a build-id in %s\n", filename); return -1; } build_id__sprintf(build_id, sizeof(build_id), sbuild_id); err = build_id_cache__add_s(sbuild_id, debugdir, filename, false, false); if (verbose) pr_info("Adding %s %s: %s\n", sbuild_id, filename, err ? "FAIL" : "Ok"); return err; } static int build_id_cache__remove_file(const char *filename, const char *debugdir) { u8 build_id[BUILD_ID_SIZE]; char sbuild_id[BUILD_ID_SIZE * 2 + 1]; int err; if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) { pr_debug("Couldn't read a build-id in %s\n", filename); return -1; } build_id__sprintf(build_id, sizeof(build_id), sbuild_id); err = build_id_cache__remove_s(sbuild_id, debugdir); if (verbose) pr_info("Removing %s %s: %s\n", sbuild_id, filename, err ? "FAIL" : "Ok"); return err; } static bool dso__missing_buildid_cache(struct dso *dso, int parm __maybe_unused) { char filename[PATH_MAX]; u8 build_id[BUILD_ID_SIZE]; if (dso__build_id_filename(dso, filename, sizeof(filename)) && filename__read_build_id(filename, build_id, sizeof(build_id)) != sizeof(build_id)) { if (errno == ENOENT) return false; pr_warning("Problems with %s file, consider removing it from the cache\n", filename); } else if (memcmp(dso->build_id, build_id, sizeof(dso->build_id))) { pr_warning("Problems with %s file, consider removing it from the cache\n", filename); } return true; } static int build_id_cache__fprintf_missing(const char *filename, bool force, FILE *fp) { struct perf_data_file file = { .path = filename, .mode = PERF_DATA_MODE_READ, .force = force, }; struct perf_session *session = perf_session__new(&file, false, NULL); if (session == NULL) return -1; perf_session__fprintf_dsos_buildid(session, fp, dso__missing_buildid_cache, 0); perf_session__delete(session); return 0; } static int build_id_cache__update_file(const char *filename, const char *debugdir) { u8 build_id[BUILD_ID_SIZE]; char sbuild_id[BUILD_ID_SIZE * 2 + 1]; int err; if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) { pr_debug("Couldn't read a build-id in %s\n", filename); return -1; } build_id__sprintf(build_id, sizeof(build_id), sbuild_id); err = build_id_cache__remove_s(sbuild_id, debugdir); if (!err) { err = build_id_cache__add_s(sbuild_id, debugdir, filename, false, false); } if (verbose) pr_info("Updating %s %s: %s\n", sbuild_id, filename, err ? "FAIL" : "Ok"); return err; } int cmd_buildid_cache(int argc, const char **argv, const char *prefix __maybe_unused) { struct strlist *list; struct str_node *pos; int ret = 0; bool force = false; char debugdir[PATH_MAX]; char const *add_name_list_str = NULL, *remove_name_list_str = NULL, *missing_filename = NULL, *update_name_list_str = NULL, *kcore_filename; const struct option buildid_cache_options[] = { OPT_STRING('a', "add", &add_name_list_str, "file list", "file(s) to add"), OPT_STRING('k', "kcore", &kcore_filename, "file", "kcore file to add"), OPT_STRING('r', "remove", &remove_name_list_str, "file list", "file(s) to remove"), OPT_STRING('M', "missing", &missing_filename, "file", "to find missing build ids in the cache"), OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), OPT_STRING('u', "update", &update_name_list_str, "file list", "file(s) to update"), OPT_INCR('v', "verbose", &verbose, "be more verbose"), OPT_END() }; const char * const buildid_cache_usage[] = { "perf buildid-cache [<options>]", NULL }; argc = parse_options(argc, argv, buildid_cache_options, buildid_cache_usage, 0); if (symbol__init() < 0) return -1; setup_pager(); snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir); if (add_name_list_str) { list = strlist__new(true, add_name_list_str); if (list) { strlist__for_each(pos, list) if (build_id_cache__add_file(pos->s, debugdir)) { if (errno == EEXIST) { pr_debug("%s already in the cache\n", pos->s); continue; } pr_warning("Couldn't add %s: %s\n", pos->s, strerror(errno)); } strlist__delete(list); } } if (remove_name_list_str) { list = strlist__new(true, remove_name_list_str); if (list) { strlist__for_each(pos, list) if (build_id_cache__remove_file(pos->s, debugdir)) { if (errno == ENOENT) { pr_debug("%s wasn't in the cache\n", pos->s); continue; } pr_warning("Couldn't remove %s: %s\n", pos->s, strerror(errno)); } strlist__delete(list); } } if (missing_filename) ret = build_id_cache__fprintf_missing(missing_filename, force, stdout); if (update_name_list_str) { list = strlist__new(true, update_name_list_str); if (list) { strlist__for_each(pos, list) if (build_id_cache__update_file(pos->s, debugdir)) { if (errno == ENOENT) { pr_debug("%s wasn't in the cache\n", pos->s); continue; } pr_warning("Couldn't update %s: %s\n", pos->s, strerror(errno)); } strlist__delete(list); } } if (kcore_filename && build_id_cache__add_kcore(kcore_filename, debugdir)) pr_warning("Couldn't add %s\n", kcore_filename); return ret; }