/* * 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 */ #include #include #include #include #include #include "builtin.h" #include "perf.h" #include "util/cache.h" #include "util/debug.h" #include "util/header.h" #include #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 *p; strlcpy(root_dir, proc_dir, sizeof(root_dir)); p = strrchr(root_dir, '/'); if (!p) return -1; *p = '\0'; return sysfs__sprintf_build_id(root_dir, sbuildid); } static int build_id_cache__kcore_dir(char *dir, size_t sz) { return fetch_current_timestamp(dir, sz); } static bool same_kallsyms_reloc(const char *from_dir, char *to_dir) { char from[PATH_MAX]; char to[PATH_MAX]; const char *name; u64 addr1 = 0, addr2 = 0; int i; scnprintf(from, sizeof(from), "%s/kallsyms", from_dir); scnprintf(to, sizeof(to), "%s/kallsyms", to_dir); for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { addr1 = kallsyms__get_function_start(from, name); if (addr1) break; } if (name) addr2 = kallsyms__get_function_start(to, name); return addr1 == addr2; } 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]; char to_subdir[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); scnprintf(to_subdir, sizeof(to_subdir), "%s/%s", to_dir, dent->d_name); if (!compare_proc_modules(from, to) && same_kallsyms_reloc(from_dir, to_subdir)) { strlcpy(to_dir, to_subdir, to_dir_sz); ret = 0; break; } } closedir(d); return ret; } static int build_id_cache__add_kcore(const char *filename, bool force) { char dir[32], sbuildid[SBUILD_ID_SIZE]; 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) < 0) return -1; scnprintf(to_dir, sizeof(to_dir), "%s/%s/%s", buildid_dir, DSO__NAME_KCORE, sbuildid); if (!force && !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/%s/%s/%s", buildid_dir, DSO__NAME_KCORE, 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) { char sbuild_id[SBUILD_ID_SIZE]; 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, filename, false, false); pr_debug("Adding %s %s: %s\n", sbuild_id, filename, err ? "FAIL" : "Ok"); return err; } static int build_id_cache__remove_file(const char *filename) { u8 build_id[BUILD_ID_SIZE]; char sbuild_id[SBUILD_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__remove_s(sbuild_id); pr_debug("Removing %s %s: %s\n", sbuild_id, filename, err ? "FAIL" : "Ok"); return err; } static int build_id_cache__purge_path(const char *pathname) { struct strlist *list; struct str_node *pos; int err; err = build_id_cache__list_build_ids(pathname, &list); if (err) goto out; strlist__for_each_entry(pos, list) { err = build_id_cache__remove_s(pos->s); pr_debug("Removing %s %s: %s\n", pos->s, pathname, err ? "FAIL" : "Ok"); if (err) break; } strlist__delete(list); out: pr_debug("Purging %s: %s\n", pathname, 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(struct perf_session *session, FILE *fp) { perf_session__fprintf_dsos_buildid(session, fp, dso__missing_buildid_cache, 0); return 0; } static int build_id_cache__update_file(const char *filename) { u8 build_id[BUILD_ID_SIZE]; char sbuild_id[SBUILD_ID_SIZE]; int err = 0; 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); if (build_id_cache__cached(sbuild_id)) err = build_id_cache__remove_s(sbuild_id); if (!err) err = build_id_cache__add_s(sbuild_id, filename, false, false); pr_debug("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 const *add_name_list_str = NULL, *remove_name_list_str = NULL, *purge_name_list_str = NULL, *missing_filename = NULL, *update_name_list_str = NULL, *kcore_filename = NULL; char sbuf[STRERR_BUFSIZE]; struct perf_data_file file = { .mode = PERF_DATA_MODE_READ, }; struct perf_session *session = NULL; 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('p', "purge", &purge_name_list_str, "path list", "path(s) to remove (remove old caches too)"), 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 []", NULL }; argc = parse_options(argc, argv, buildid_cache_options, buildid_cache_usage, 0); if (argc || (!add_name_list_str && !kcore_filename && !remove_name_list_str && !purge_name_list_str && !missing_filename && !update_name_list_str)) usage_with_options(buildid_cache_usage, buildid_cache_options); if (missing_filename) { file.path = missing_filename; file.force = force; session = perf_session__new(&file, false, NULL); if (session == NULL) return -1; } if (symbol__init(session ? &session->header.env : NULL) < 0) goto out; setup_pager(); if (add_name_list_str) { list = strlist__new(add_name_list_str, NULL); if (list) { strlist__for_each_entry(pos, list) if (build_id_cache__add_file(pos->s)) { if (errno == EEXIST) { pr_debug("%s already in the cache\n", pos->s); continue; } pr_warning("Couldn't add %s: %s\n", pos->s, str_error_r(errno, sbuf, sizeof(sbuf))); } strlist__delete(list); } } if (remove_name_list_str) { list = strlist__new(remove_name_list_str, NULL); if (list) { strlist__for_each_entry(pos, list) if (build_id_cache__remove_file(pos->s)) { 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, str_error_r(errno, sbuf, sizeof(sbuf))); } strlist__delete(list); } } if (purge_name_list_str) { list = strlist__new(purge_name_list_str, NULL); if (list) { strlist__for_each_entry(pos, list) if (build_id_cache__purge_path(pos->s)) { 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, str_error_r(errno, sbuf, sizeof(sbuf))); } strlist__delete(list); } } if (missing_filename) ret = build_id_cache__fprintf_missing(session, stdout); if (update_name_list_str) { list = strlist__new(update_name_list_str, NULL); if (list) { strlist__for_each_entry(pos, list) if (build_id_cache__update_file(pos->s)) { 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, str_error_r(errno, sbuf, sizeof(sbuf))); } strlist__delete(list); } } if (kcore_filename && build_id_cache__add_kcore(kcore_filename, force)) pr_warning("Couldn't add %s\n", kcore_filename); out: perf_session__delete(session); return ret; } R4: 00000000000006e0 Call Trace: request_firmware+0x37/0x50 trigger_request_store+0x79/0xd0 [test_firmware] dev_attr_store+0x18/0x30 sysfs_kf_write+0x37/0x40 kernfs_fop_write+0x110/0x1a0 __vfs_write+0x37/0x160 ? _cond_resched+0x1a/0x50 vfs_write+0xb5/0x1a0 SyS_write+0x55/0xc0 ? trace_do_page_fault+0x37/0xd0 entry_SYSCALL_64_fastpath+0x1e/0xad RIP: 0033:0x7f8603f49620 RSP: 002b:00007fff6287b788 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000055c307b110a0 RCX: 00007f8603f49620 RDX: 0000000000000016 RSI: 000055c3084d8a90 RDI: 0000000000000001 RBP: 0000000000000016 R08: 000000000000c0ff R09: 000055c3084d6336 R10: 000055c307b108b0 R11: 0000000000000246 R12: 000055c307b13c80 R13: 000055c3084d6320 R14: 0000000000000000 R15: 00007fff6287b950 Code: 9f 64 84 e8 9c 61 fe ff b8 f4 ff ff ff e9 6b f9 ff ff 48 c7 c7 40 6b 8d 84 89 45 a8 e8 43 84 18 00 49 8b be 00 03 00 00 8b 45 a8 <83> 7f 38 02 74 08 e8 6e ec ff ff 8b 45 a8 49 c7 86 00 03 00 00 RIP: _request_firmware+0xa27/0xad0 RSP: ffffbb15c0bcbd10 CR2: 0000000000000038 ---[ end trace 6d94ac339c133e6f ]--- Fixes: 5d47ec02c37e ("firmware: Correct handling of fw_state_wait() return value") Reported-and-Tested-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reported-and-Tested-by: Patrick Bruenn <p.bruenn@beckhoff.com> Reported-by: Chris Wilson <chris@chris-wilson.co.uk> CC: <stable@vger.kernel.org> [3.10+] Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/rose')