/* * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved. * Copyright (C) 2004-2014 Red Hat, Inc. All rights reserved. * * This file is part of LVM2. * * This copyrighted material is made available to anyone wishing to use, * modify, copy, or redistribute it subject to the terms and conditions * of the GNU Lesser General Public License v.2.1. * * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "base/memory/zalloc.h" #include "lib/misc/lib.h" #include "lib/commands/toolcontext.h" #include "lib/metadata/metadata.h" #include "lib/config/defaults.h" #include "lib/misc/lvm-string.h" #include "lib/activate/activate.h" #include "lib/filters/filter.h" #include "lib/label/label.h" #include "lib/label/hints.h" #include "lib/misc/lvm-file.h" #include "lib/format_text/format-text.h" #include "lib/display/display.h" #include "lib/mm/memlock.h" #include "lib/datastruct/str_list.h" #include "lib/metadata/segtype.h" #include "lib/cache/lvmcache.h" #include "lib/format_text/archiver.h" #include "lib/lvmpolld/lvmpolld-client.h" #include "lib/device/device_id.h" #include #include #include #include #include #include #ifdef APP_MACHINEID_SUPPORT #include #endif #ifdef __linux__ # include #endif static const size_t _linebuffer_size = 4096; /* * Copy the input string, removing invalid characters. */ const char *system_id_from_string(struct cmd_context *cmd, const char *str) { char *system_id; if (!str || !*str) { log_warn("WARNING: Empty system ID supplied."); return ""; } if (!(system_id = dm_pool_zalloc(cmd->libmem, strlen(str) + 1))) { log_warn("WARNING: Failed to allocate system ID."); return NULL; } copy_systemid_chars(str, system_id); if (!*system_id) { log_warn("WARNING: Invalid system ID format: %s", str); return NULL; } if (!strncmp(system_id, "localhost", 9)) { log_warn("WARNING: system ID may not begin with the string \"localhost\"."); return NULL; } return system_id; } static const char *_read_system_id_from_file(struct cmd_context *cmd, const char *file) { char *line = NULL; size_t line_size; char *start, *end; const char *system_id = NULL; FILE *fp; if (!file || !strlen(file) || !file[0]) return_NULL; if (!(fp = fopen(file, "r"))) { log_warn("WARNING: %s: fopen failed: %s", file, strerror(errno)); return NULL; } while (getline(&line, &line_size, fp) > 0) { start = line; /* Ignore leading whitespace */ while (*start && isspace(*start)) start++; /* Ignore rest of line after # */ if (!*start || *start == '#') continue; if (system_id && *system_id) { log_warn("WARNING: Ignoring extra line(s) in system ID file %s.", file); break; } /* Remove any comments from end of line */ for (end = start; *end; end++) if (*end == '#') { *end = '\0'; break; } system_id = system_id_from_string(cmd, start); } free(line); if (fclose(fp)) stack; return system_id; } /* systemd-id128 new produced: f64406832c2140e8ac5422d1089aae03 */ #define LVM_APPLICATION_ID SD_ID128_MAKE(f6,44,06,83,2c,21,40,e8,ac,54,22,d1,08,9a,ae,03) static const char *_system_id_from_source(struct cmd_context *cmd, const char *source) { char buf[PATH_MAX]; const char *file; const char *etc_str; const char *str; const char *system_id = NULL; if (!strcasecmp(source, "uname")) { if (cmd->hostname) system_id = system_id_from_string(cmd, cmd->hostname); goto out; } /* lvm.conf and lvmlocal.conf are merged into one config tree */ if (!strcasecmp(source, "lvmlocal")) { if ((str = find_config_tree_str(cmd, local_system_id_CFG, NULL))) system_id = system_id_from_string(cmd, str); goto out; } #ifdef APP_MACHINEID_SUPPORT if (!strcasecmp(source, "appmachineid")) { sd_id128_t id = { 0 }; if (sd_id128_get_machine_app_specific(LVM_APPLICATION_ID, &id) != 0) log_warn("WARNING: sd_id128_get_machine_app_specific() failed %s (%d).", strerror(errno), errno); if (dm_snprintf(buf, PATH_MAX, SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(id)) < 0) stack; system_id = system_id_from_string(cmd, buf); goto out; } #endif if (!strcasecmp(source, "machineid") || !strcasecmp(source, "machine-id")) { etc_str = find_config_tree_str(cmd, global_etc_CFG, NULL); if (dm_snprintf(buf, sizeof(buf), "%s/machine-id", etc_str) != -1) system_id = _read_system_id_from_file(cmd, buf); goto out; } if (!strcasecmp(source, "file")) { file = find_config_tree_str(cmd, global_system_id_file_CFG, NULL); system_id = _read_system_id_from_file(cmd, file); goto out; } log_warn("WARNING: Unrecognised system_id_source \"%s\".", source); out: return system_id; } static int _get_env_vars(struct cmd_context *cmd) { const char *e; /* Set to "" to avoid using any system directory */ if ((e = getenv("LVM_SYSTEM_DIR"))) { if (dm_snprintf(cmd->system_dir, sizeof(cmd->system_dir), "%s", e) < 0) { log_error("LVM_SYSTEM_DIR environment variable " "is too long."); return 0; } } if (strcmp((getenv("LVM_RUN_BY_DMEVENTD") ? : "0"), "1") == 0) init_run_by_dmeventd(cmd); return 1; } static void _get_sysfs_dir(struct cmd_context *cmd, char *buf, size_t buf_size) { static char proc_mounts[PATH_MAX]; static char *split[4], buffer[PATH_MAX + 16]; FILE *fp; char *sys_mnt = NULL; *buf = '\0'; if (!*cmd->proc_dir) { log_debug("No proc filesystem found: skipping sysfs detection"); return; } if (dm_snprintf(proc_mounts, sizeof(proc_mounts), "%s/mounts", cmd->proc_dir) < 0) { log_error("Failed to create /proc/mounts string for sysfs detection"); return; } if (!(fp = fopen(proc_mounts, "r"))) { log_sys_error("_get_sysfs_dir fopen", proc_mounts); return; } while (fgets(buffer, sizeof(buffer), fp)) { if (dm_split_words(buffer, 4, 0, split) == 4 && !strcmp(split[2], "sysfs")) { sys_mnt = split[1]; break; } } if (fclose(fp)) log_sys_error("fclose", proc_mounts); if (!sys_mnt) { log_error("Failed to find sysfs mount point"); return; } (void) dm_strncpy(buf, sys_mnt, buf_size); } static uint32_t _parse_debug_fields(struct cmd_context *cmd, int cfg, const char *cfgname) { const struct dm_config_node *cn; const struct dm_config_value *cv; uint32_t debug_fields = 0; if (!(cn = find_config_tree_array(cmd, cfg, NULL))) { log_error(INTERNAL_ERROR "Unable to find configuration for log/%s.", cfgname); return 0; } for (cv = cn->v; cv; cv = cv->next) { if (cv->type != DM_CFG_STRING) { log_verbose("log/%s contains a value which is not a string. Ignoring.", cfgname); continue; } if (!strcasecmp(cv->v.str, "all")) return 0; if (!strcasecmp(cv->v.str, "time")) debug_fields |= LOG_DEBUG_FIELD_TIME; else if (!strcasecmp(cv->v.str, "command")) debug_fields |= LOG_DEBUG_FIELD_COMMAND; else if (!strcasecmp(cv->v.str, "fileline")) debug_fields |= LOG_DEBUG_FIELD_FILELINE; else if (!strcasecmp(cv->v.str, "message")) debug_fields |= LOG_DEBUG_FIELD_MESSAGE; else log_verbose("Unrecognised value for log/%s: %s", cfgname, cv->v.str); } return debug_fields; } static int _parse_debug_classes(struct cmd_context *cmd) { const struct dm_config_node *cn; const struct dm_config_value *cv; int debug_classes = 0; if (!(cn = find_config_tree_array(cmd, log_debug_classes_CFG, NULL))) { log_error(INTERNAL_ERROR "Unable to find configuration for log/debug_classes."); return -1; } for (cv = cn->v; cv; cv = cv->next) { if (cv->type != DM_CFG_STRING) { log_verbose("log/debug_classes contains a value " "which is not a string. Ignoring."); continue; } if (!strcasecmp(cv->v.str, "all")) return -1; if (!strcasecmp(cv->v.str, "memory")) debug_classes |= LOG_CLASS_MEM; else if (!strcasecmp(cv->v.str, "devices")) debug_classes |= LOG_CLASS_DEVS; else if (!strcasecmp(cv->v.str, "activation")) debug_classes |= LOG_CLASS_ACTIVATION; else if (!strcasecmp(cv->v.str, "allocation")) debug_classes |= LOG_CLASS_ALLOC; else if (!strcasecmp(cv->v.str, "metadata")) debug_classes |= LOG_CLASS_METADATA; else if (!strcasecmp(cv->v.str, "cache")) debug_classes |= LOG_CLASS_CACHE; else if (!strcasecmp(cv->v.str, "locking")) debug_classes |= LOG_CLASS_LOCKING; else if (!strcasecmp(cv->v.str, "lvmpolld")) debug_classes |= LOG_CLASS_LVMPOLLD; else if (!strcasecmp(cv->v.str, "dbus")) debug_classes |= LOG_CLASS_DBUS; else if (!strcasecmp(cv->v.str, "io")) debug_classes |= LOG_CLASS_IO; else log_verbose("Unrecognised value for log/debug_classes: %s", cv->v.str); } return debug_classes; } static uint32_t _parse_log_journal(struct cmd_context *cmd, int cfg, const char *cfgname) { const struct dm_config_node *cn; const struct dm_config_value *cv; uint32_t fields = 0; uint32_t val; if (!(cn = find_config_tree_array(cmd, cfg, NULL))) { log_debug("Unable to find configuration for log/%s.", cfgname); return 0; } for (cv = cn->v; cv; cv = cv->next) { if (cv->type != DM_CFG_STRING) { log_verbose("log/%s contains a value which is not a string. Ignoring.", cfgname); continue; } if ((val = log_journal_str_to_val(cv->v.str))) fields |= val; else log_verbose("Unrecognised value for log/%s: %s", cfgname, cv->v.str); } return fields; } static void _init_logging(struct cmd_context *cmd) { int append = 1; time_t t; const char *log_file; char timebuf[26]; /* Syslog */ cmd->default_settings.syslog = find_config_tree_bool(cmd, log_syslog_CFG, NULL); if (cmd->default_settings.syslog) init_syslog(1, DEFAULT_LOG_FACILITY); else fin_syslog(); /* Debug level for log file output */ cmd->default_settings.debug = find_config_tree_int(cmd, log_level_CFG, NULL); init_debug(cmd->default_settings.debug); /* * Suppress all non-essential stdout? * -qq can override the default of 0 to 1 later. * Once set to 1, there is no facility to change it back to 0. */ cmd->default_settings.silent = silent_mode() ? : find_config_tree_bool(cmd, log_silent_CFG, NULL); init_silent(cmd->default_settings.silent); /* Verbose level for tty output */ cmd->default_settings.verbose = find_config_tree_int(cmd, log_verbose_CFG, NULL); init_verbose(cmd->default_settings.verbose + VERBOSE_BASE_LEVEL); /* Log message formatting */ init_indent(find_config_tree_bool(cmd, log_indent_CFG, NULL)); init_abort_on_internal_errors(find_config_tree_bool(cmd, global_abort_on_internal_errors_CFG, NULL)); cmd->default_settings.msg_prefix = find_config_tree_str_allow_empty(cmd, log_prefix_CFG, NULL); init_msg_prefix(cmd->default_settings.msg_prefix); /* so that file and verbose output have a command prefix */ init_log_command(0, 0); /* Test mode */ cmd->default_settings.test = find_config_tree_bool(cmd, global_test_CFG, NULL); init_test(cmd->default_settings.test); /* Settings for logging to file */ if (find_config_tree_bool(cmd, log_overwrite_CFG, NULL)) append = 0; log_file = find_config_tree_str(cmd, log_file_CFG, NULL); if (log_file) { fin_log(); init_log_file(log_file, append); } init_log_while_suspended(find_config_tree_bool(cmd, log_activation_CFG, NULL)); cmd->default_settings.debug_classes = _parse_debug_classes(cmd); log_debug("Setting log debug classes to %d", cmd->default_settings.debug_classes); init_debug_classes_logged(cmd->default_settings.debug_classes); init_debug_file_fields(_parse_debug_fields(cmd, log_debug_file_fields_CFG, "debug_file_fields")); init_debug_output_fields(_parse_debug_fields(cmd, log_debug_output_fields_CFG, "debug_output_fields")); cmd->default_settings.journal = _parse_log_journal(cmd, log_journal_CFG, "journal"); init_log_journal(cmd->default_settings.journal); t = time(NULL); ctime_r(&t, &timebuf[0]); timebuf[24] = '\0'; log_verbose("Logging initialised at %s", timebuf); /* Tell device-mapper about our logging */ #ifdef DEVMAPPER_SUPPORT if (!dm_log_is_non_default()) dm_log_with_errno_init(print_log_libdm); #endif reset_log_duplicated(); reset_lvm_errno(1); } static int _check_disable_udev(const char *msg) { if (getenv("DM_DISABLE_UDEV")) { log_very_verbose("DM_DISABLE_UDEV environment variable set."); log_very_verbose("Overriding configuration to use udev_rules=0, udev_sync=0, verify_udev_operations=1."); log_very_verbose("LVM will %s.", msg); return 1; } return 0; } static int _check_config_by_source(struct cmd_context *cmd, config_source_t source) { struct dm_config_tree *cft; struct cft_check_handle *handle; if (!(cft = get_config_tree_by_source(cmd, source)) || !(handle = get_config_tree_check_handle(cmd, cft))) return 1; return config_def_check(handle); } static int _check_config(struct cmd_context *cmd) { int abort_on_error; if (!find_config_tree_bool(cmd, config_checks_CFG, NULL)) return 1; abort_on_error = find_config_tree_bool(cmd, config_abort_on_errors_CFG, NULL); if ((!_check_config_by_source(cmd, CONFIG_STRING) || !_check_config_by_source(cmd, CONFIG_MERGED_FILES) || !_check_config_by_source(cmd, CONFIG_FILE)) && abort_on_error) { log_error("LVM_ configuration invalid."); return 0; } return 1; } static const char *_set_time_format(struct cmd_context *cmd) { /* Compared to strftime, we do not allow "newline" character - the %n in format. */ static const char *allowed_format_chars = "aAbBcCdDeFGghHIjklmMpPrRsStTuUVwWxXyYzZ%"; static const char *allowed_alternative_format_chars_e = "cCxXyY"; static const char *allowed_alternative_format_chars_o = "deHImMSuUVwWy"; static const char *chars_to_check; const char *tf = find_config_tree_str(cmd, report_time_format_CFG, NULL); const char *p_fmt; size_t i; char c; if (!*tf) { log_error("Configured time format is empty string."); goto bad; } else { p_fmt = tf; while ((c = *p_fmt)) { if (c == '%') { c = *++p_fmt; if (c == 'E') { c = *++p_fmt; chars_to_check = allowed_alternative_format_chars_e; } else if (c == 'O') { c = *++p_fmt; chars_to_check = allowed_alternative_format_chars_o; } else chars_to_check = allowed_format_chars; for (i = 0; chars_to_check[i]; i++) { if (c == chars_to_check[i]) break; } if (!chars_to_check[i]) goto_bad; } else if (isprint(c)) p_fmt++; else { log_error("Configured time format contains non-printable characters."); goto bad; } } } return tf; bad: log_error("Invalid time format \"%s\" supplied.", tf); return NULL; } int process_profilable_config(struct cmd_context *cmd) { const char *units; if (!(cmd->default_settings.unit_factor = dm_units_to_factor(units = find_config_tree_str(cmd, global_units_CFG, NULL), &cmd->default_settings.unit_type, 1, NULL))) { log_error("Unrecognised configuration setting for global/units: %s", units); return 0; } cmd->si_unit_consistency = find_config_tree_bool(cmd, global_si_unit_consistency_CFG, NULL); cmd->report_binary_values_as_numeric = find_config_tree_bool(cmd, report_binary_values_as_numeric_CFG, NULL); cmd->report_mark_hidden_devices = find_config_tree_bool(cmd, report_mark_hidden_devices_CFG, NULL); cmd->default_settings.suffix = find_config_tree_bool(cmd, global_suffix_CFG, NULL); cmd->report_list_item_separator = find_config_tree_str(cmd, report_list_item_separator_CFG, NULL); if (!(cmd->time_format = _set_time_format(cmd))) return 0; return 1; } static int _init_system_id(struct cmd_context *cmd) { const char *source, *system_id; int local_set = 0; cmd->system_id = NULL; cmd->unknown_system_id = 0; system_id = find_config_tree_str_allow_empty(cmd, local_system_id_CFG, NULL); if (system_id && *system_id) local_set = 1; source = find_config_tree_str(cmd, global_system_id_source_CFG, NULL); if (!source) source = "none"; /* Defining local system_id but not using it is probably a config mistake. */ if (local_set && strcmp(source, "lvmlocal")) log_warn("WARNING: local/system_id is set, so should global/system_id_source be \"lvmlocal\" not \"%s\"?", source); if (!strcmp(source, "none")) return 1; if ((system_id = _system_id_from_source(cmd, source)) && *system_id) { cmd->system_id = system_id; return 1; } /* * The source failed to resolve a system_id. In this case allow * VGs with no system_id to be accessed, but not VGs with a system_id. */ log_warn("WARNING: No system ID found from system_id_source %s.", source); cmd->unknown_system_id = 1; return 1; } static void _init_device_ids_refresh(struct cmd_context *cmd) { const struct dm_config_node *cn; const struct dm_config_value *cv; int check_product_uuid = 0; int check_hostname = 0; char path[PATH_MAX]; char uuid[128] = { 0 }; cmd->device_ids_check_product_uuid = 0; cmd->device_ids_check_hostname = 0; if (!find_config_tree_bool(cmd, devices_device_ids_refresh_CFG, NULL)) return; if (!(cn = find_config_tree_array(cmd, devices_device_ids_refresh_checks_CFG, NULL))) return; for (cv = cn->v; cv; cv = cv->next) { if (cv->type != DM_CFG_STRING) continue; if (!strcmp(cv->v.str, "product_uuid")) check_product_uuid = 1; if (!strcmp(cv->v.str, "hostname")) check_hostname = 1; } if (check_product_uuid) { const char *sysfs_dir = cmd->device_id_sysfs_dir ?: dm_sysfs_dir(); if (dm_snprintf(path, sizeof(path), "%sdevices/virtual/dmi/id/product_uuid", sysfs_dir) < 0) return; if (get_sysfs_value(path, uuid, sizeof(uuid), 0) && uuid[0]) cmd->product_uuid = dm_pool_strdup(cmd->libmem, uuid);; if (cmd->product_uuid) cmd->device_ids_check_product_uuid = 1; } if (check_hostname && cmd->hostname) cmd->device_ids_check_hostname = 1; } static int _process_config(struct cmd_context *cmd) { mode_t old_umask; const char *dev_ext_info_src = NULL; const char *read_ahead; struct stat st; const struct dm_config_node *cn; const struct dm_config_value *cv; int64_t pv_min_kb; int udev_disabled = 0; char sysfs_dir[PATH_MAX]; if (!_check_config(cmd)) return_0; /* umask */ cmd->default_settings.umask = find_config_tree_int(cmd, global_umask_CFG, NULL); if ((old_umask = umask((mode_t) cmd->default_settings.umask)) != (mode_t) cmd->default_settings.umask) log_verbose("Set umask from %04o to %04o", old_umask, cmd->default_settings.umask); /* dev dir */ if (dm_snprintf(cmd->dev_dir, sizeof(cmd->dev_dir), "%s/", find_config_tree_str(cmd, devices_dir_CFG, NULL)) < 0) { log_error("Device directory given in config file too long"); return 0; } #ifdef DEVMAPPER_SUPPORT dm_set_dev_dir(cmd->dev_dir); if (!dm_set_uuid_prefix(UUID_PREFIX)) return_0; #endif cmd->device_id_sysfs_dir = find_config_tree_str(cmd, devices_device_id_sysfs_dir_CFG, NULL); dev_ext_info_src = find_config_tree_str(cmd, devices_external_device_info_source_CFG, NULL); if (dev_ext_info_src && strcmp(dev_ext_info_src, "none") && strcmp(dev_ext_info_src, "udev")) { log_warn("WARNING: unknown external device info source, using none."); dev_ext_info_src = NULL; } if (dev_ext_info_src && !strcmp(dev_ext_info_src, "udev")) { if (udev_init_library_context()) { init_external_device_info_source(DEV_EXT_UDEV); } else { log_warn("WARNING: failed to init udev for external device info, using none."); dev_ext_info_src = NULL; } } if (!dev_ext_info_src || !strcmp(dev_ext_info_src, "none")) init_external_device_info_source(DEV_EXT_NONE); /* proc dir */ if (dm_snprintf(cmd->proc_dir, sizeof(cmd->proc_dir), "%s", find_config_tree_str(cmd, global_proc_CFG, NULL)) < 0) { log_error("Device directory given in config file too long"); return 0; } if (*cmd->proc_dir && !dir_exists(cmd->proc_dir)) { log_warn("WARNING: proc dir %s not found - some checks will be bypassed", cmd->proc_dir); cmd->proc_dir[0] = '\0'; } _get_sysfs_dir(cmd, sysfs_dir, sizeof(sysfs_dir)); dm_set_sysfs_dir(sysfs_dir); /* activation? */ cmd->default_settings.activation = find_config_tree_bool(cmd, global_activation_CFG, NULL); set_activation(cmd->default_settings.activation, 0); cmd->auto_set_activation_skip = find_config_tree_bool(cmd, activation_auto_set_activation_skip_CFG, NULL); read_ahead = find_config_tree_str(cmd, activation_readahead_CFG, NULL); if (!strcasecmp(read_ahead, "auto")) cmd->default_settings.read_ahead = DM_READ_AHEAD_AUTO; else if (!strcasecmp(read_ahead, "none")) cmd->default_settings.read_ahead = DM_READ_AHEAD_NONE; else { log_error("Invalid readahead specification"); return 0; } /* * If udev is disabled using DM_DISABLE_UDEV environment * variable, override existing config and hardcode these: * - udev_rules = 0 * - udev_sync = 0 * - udev_fallback = 1 */ udev_disabled = _check_disable_udev("manage logical volume symlinks in device directory"); cmd->default_settings.udev_rules = udev_disabled ? 0 : find_config_tree_bool(cmd, activation_udev_rules_CFG, NULL); cmd->default_settings.udev_sync = udev_disabled ? 0 : find_config_tree_bool(cmd, activation_udev_sync_CFG, NULL); /* * Set udev_fallback lazily on first use since it requires * checking DM driver version which is an extra ioctl! * This also prevents unnecessary use of mapper/control. * If udev is disabled globally, set fallback mode immediately. */ cmd->default_settings.udev_fallback = udev_disabled ? 1 : -1; cmd->default_settings.issue_discards = find_config_tree_bool(cmd, devices_issue_discards_CFG, NULL); init_retry_deactivation(find_config_tree_bool(cmd, activation_retry_deactivation_CFG, NULL)); init_activation_checks(find_config_tree_bool(cmd, activation_checks_CFG, NULL)); cmd->use_linear_target = find_config_tree_bool(cmd, activation_use_linear_target_CFG, NULL); cmd->stripe_filler = find_config_tree_str(cmd, activation_missing_stripe_filler_CFG, NULL); /* FIXME Missing error code checks from the stats, not log_warn?, notify if setting overridden, delay message/check till it is actually used (eg consider if lvm shell - file could appear later after this check)? */ if (!strcmp(cmd->stripe_filler, "/dev/ioerror") && stat(cmd->stripe_filler, &st)) cmd->stripe_filler = "error"; else if (strcmp(cmd->stripe_filler, "error") && strcmp(cmd->stripe_filler, "zero")) { if (stat(cmd->stripe_filler, &st)) { log_warn("WARNING: activation/missing_stripe_filler = \"%s\" " "is invalid,", cmd->stripe_filler); log_warn(" stat failed: %s", strerror(errno)); log_warn("Falling back to \"error\" missing_stripe_filler."); cmd->stripe_filler = "error"; } else if (!S_ISBLK(st.st_mode)) { log_warn("WARNING: activation/missing_stripe_filler = \"%s\" " "is not a block device.", cmd->stripe_filler); log_warn("Falling back to \"error\" missing_stripe_filler."); cmd->stripe_filler = "error"; } } if ((cn = find_config_tree_array(cmd, activation_mlock_filter_CFG, NULL))) for (cv = cn->v; cv; cv = cv->next) if ((cv->type != DM_CFG_STRING) || !cv->v.str[0]) log_error("Ignoring invalid activation/mlock_filter entry in config file"); cmd->metadata_read_only = find_config_tree_bool(cmd, global_metadata_read_only_CFG, NULL); pv_min_kb = find_config_tree_int64(cmd, devices_pv_min_size_CFG, NULL); if (pv_min_kb < PV_MIN_SIZE_KB) { log_warn("Ignoring too small pv_min_size %" PRId64 "KB, using default %dKB.", pv_min_kb, PV_MIN_SIZE_KB); pv_min_kb = PV_MIN_SIZE_KB; } /* LVM stores sizes internally in units of 512-byte sectors. */ init_pv_min_size((uint64_t)pv_min_kb * (1024 >> SECTOR_SHIFT)); cmd->check_pv_dev_sizes = find_config_tree_bool(cmd, metadata_check_pv_device_sizes_CFG, NULL); cmd->event_activation = find_config_tree_bool(cmd, global_event_activation_CFG, NULL); if (!process_profilable_config(cmd)) return_0; if (find_config_tree_bool(cmd, report_two_word_unknown_device_CFG, NULL)) init_unknown_device_name("unknown device"); if (!_init_system_id(cmd)) return_0; _init_device_ids_refresh(cmd); init_io_memory_size(find_config_tree_int(cmd, global_io_memory_size_CFG, NULL)); return 1; } static int _set_tag(struct cmd_context *cmd, const char *tag) { log_very_verbose("Setting host tag: %s", dm_pool_strdup(cmd->libmem, tag)); if (!str_list_add(cmd->libmem, &cmd->tags, tag)) { log_error("_set_tag: str_list_add %s failed", tag); return 0; } return 1; } static int _check_host_filters(struct cmd_context *cmd, const struct dm_config_node *hn, int *passes) { const struct dm_config_node *cn; const struct dm_config_value *cv; *passes = 1; for (cn = hn; cn; cn = cn->sib) { if (!cn->v) continue; if (!strcmp(cn->key, "host_list")) { *passes = 0; if (cn->v->type == DM_CFG_EMPTY_ARRAY) continue; for (cv = cn->v; cv; cv = cv->next) { if (cv->type != DM_CFG_STRING) { log_error("Invalid hostname string " "for tag %s", cn->key); return 0; } if (!strcmp(cv->v.str, cmd->hostname)) { *passes = 1; return 1; } } } if (!strcmp(cn->key, "host_filter")) { log_error("host_filter not supported yet"); return 0; } } return 1; } static int _init_tags(struct cmd_context *cmd, struct dm_config_tree *cft) { const struct dm_config_node *tn, *cn; const char *tag; int passes; /* Access tags section directly */ if (!(tn = find_config_node(cmd, cft, tags_CFG_SECTION)) || !tn->child) return 1; /* NB hosttags 0 when already 1 intentionally does not delete the tag */ if (!cmd->hosttags && find_config_bool(cmd, cft, tags_hosttags_CFG)) { /* FIXME Strip out invalid chars: only A-Za-z0-9_+.- */ if (!_set_tag(cmd, cmd->hostname)) return_0; cmd->hosttags = 1; } for (cn = tn->child; cn; cn = cn->sib) { if (cn->v) continue; tag = cn->key; if (*tag == '@') tag++; if (!validate_name(tag)) { log_error("Invalid tag in config file: %s", cn->key); return 0; } if (cn->child) { passes = 0; if (!_check_host_filters(cmd, cn->child, &passes)) return_0; if (!passes) continue; } if (!_set_tag(cmd, tag)) return_0; } return 1; } static int _load_config_file(struct cmd_context *cmd, const char *tag, int local) { static char config_file[PATH_MAX] = ""; const char *filler = ""; struct config_tree_list *cfl; if (*tag) filler = "_"; else if (local) { filler = ""; tag = "local"; } if (dm_snprintf(config_file, sizeof(config_file), "%s/lvm%s%s.conf", cmd->system_dir, filler, tag) < 0) { log_error("LVM_SYSTEM_DIR or tag was too long"); return 0; } if (!(cfl = dm_pool_alloc(cmd->libmem, sizeof(*cfl)))) { log_error("config_tree_list allocation failed"); return 0; } if (!(cfl->cft = config_file_open_and_read(config_file, CONFIG_FILE, cmd))) return_0; dm_list_add(&cmd->config_files, &cfl->list); if (*tag) { if (!_init_tags(cmd, cfl->cft)) return_0; } else /* Use temporary copy of lvm.conf while loading other files */ cmd->cft = cfl->cft; return 1; } /* * Find and read lvm.conf. */ static int _init_lvm_conf(struct cmd_context *cmd) { /* No config file if LVM_SYSTEM_DIR is empty */ if (!*cmd->system_dir) { if (!(cmd->cft = config_open(CONFIG_FILE, NULL, 0))) { log_error("Failed to create config tree"); return 0; } return 1; } if (!_load_config_file(cmd, "", 0)) return_0; return 1; } /* Read any additional config files */ static int _init_tag_configs(struct cmd_context *cmd) { struct dm_str_list *sl; /* Tag list may grow while inside this loop */ dm_list_iterate_items(sl, &cmd->tags) { if (!_load_config_file(cmd, sl->str, 0)) return_0; } return 1; } static int _init_profiles(struct cmd_context *cmd) { const char *dir; if (!(dir = find_config_tree_str(cmd, config_profile_dir_CFG, NULL))) return_0; if (!cmd->profile_params) { if (!(cmd->profile_params = dm_pool_zalloc(cmd->libmem, sizeof(*cmd->profile_params)))) { log_error("profile_params alloc failed"); return 0; } dm_list_init(&cmd->profile_params->profiles_to_load); dm_list_init(&cmd->profile_params->profiles); } if (!(dm_strncpy(cmd->profile_params->dir, dir, sizeof(cmd->profile_params->dir)))) { log_error("_init_profiles: dm_strncpy failed"); return 0; } return 1; } static struct dm_config_tree *_merge_config_files(struct cmd_context *cmd, struct dm_config_tree *cft) { struct config_tree_list *cfl; /* Replace temporary duplicate copy of lvm.conf */ if (cft->root) { if (!(cft = config_open(CONFIG_MERGED_FILES, NULL, 0))) { log_error("Failed to create config tree"); return 0; } } dm_list_iterate_items(cfl, &cmd->config_files) { /* Merge all config trees into cmd->cft using merge/tag rules */ if (!merge_config_tree(cmd, cft, cfl->cft, CONFIG_MERGE_TYPE_TAGS)) return_0; } return cft; } static void _destroy_tags(struct cmd_context *cmd) { struct dm_list *slh, *slht; dm_list_iterate_safe(slh, slht, &cmd->tags) { dm_list_del(slh); } } int config_files_changed(struct cmd_context *cmd) { struct config_tree_list *cfl; dm_list_iterate_items(cfl, &cmd->config_files) { if (config_file_changed(cfl->cft)) return 1; } return 0; } static void _destroy_config(struct cmd_context *cmd) { struct config_tree_list *cfl; struct dm_config_tree *cft; struct profile *profile, *tmp_profile; /* * Configuration cascade: * CONFIG_STRING -> CONFIG_PROFILE -> CONFIG_FILE/CONFIG_MERGED_FILES */ /* CONFIG_FILE/CONFIG_MERGED_FILES */ if ((cft = remove_config_tree_by_source(cmd, CONFIG_MERGED_FILES))) config_destroy(cft); else if ((cft = remove_config_tree_by_source(cmd, CONFIG_FILE))) { dm_list_iterate_items(cfl, &cmd->config_files) { if (cfl->cft == cft) dm_list_del(&cfl->list); } config_destroy(cft); } dm_list_iterate_items(cfl, &cmd->config_files) config_destroy(cfl->cft); dm_list_init(&cmd->config_files); /* CONFIG_PROFILE */ if (cmd->profile_params) { remove_config_tree_by_source(cmd, CONFIG_PROFILE_COMMAND); remove_config_tree_by_source(cmd, CONFIG_PROFILE_METADATA); /* * Destroy config trees for any loaded profiles and * move these profiles to profile_to_load list. * Whenever these profiles are referenced later, * they will get loaded again automatically. */ dm_list_iterate_items_safe(profile, tmp_profile, &cmd->profile_params->profiles) { if (cmd->is_interactive && (profile == cmd->profile_params->shell_profile)) continue; config_destroy(profile->cft); profile->cft = NULL; dm_list_move(&cmd->profile_params->profiles_to_load, &profile->list); } } /* CONFIG_STRING */ if ((cft = remove_config_tree_by_source(cmd, CONFIG_STRING))) config_destroy(cft); if (cmd->cft) log_error(INTERNAL_ERROR "_destroy_config: " "cmd config tree not destroyed fully"); } static int _init_dev_cache(struct cmd_context *cmd) { const struct dm_config_node *cn; const struct dm_config_value *cv; size_t len, udev_dir_len = strlen(DM_UDEV_DEV_DIR); int len_diff; int device_list_from_udev; if (!dev_cache_init(cmd)) return_0; if ((device_list_from_udev = find_config_tree_bool(cmd, devices_obtain_device_list_from_udev_CFG, NULL))) { if (!udev_init_library_context()) device_list_from_udev = 0; } init_obtain_device_list_from_udev(device_list_from_udev); if (!(cn = find_config_tree_array(cmd, devices_scan_CFG, NULL))) { log_error(INTERNAL_ERROR "Unable to find configuration for devices/scan."); return 0; } for (cv = cn->v; cv; cv = cv->next) { if (cv->type != DM_CFG_STRING) { log_error("Invalid string in config file: " "devices/scan"); return 0; } if (device_list_from_udev) { len = strlen(cv->v.str); /* * DM_UDEV_DEV_DIR always has '/' at its end. * If the item in the conf does not have it, be sure * to make the right comparison without the '/' char! */ len_diff = len && cv->v.str[len - 1] != '/' ? udev_dir_len - 1 != len : udev_dir_len != len; if (len_diff || strncmp(DM_UDEV_DEV_DIR, cv->v.str, len)) { log_very_verbose("Non standard udev dir %s, resetting " "devices/obtain_device_list_from_udev.", cv->v.str); device_list_from_udev = 0; init_obtain_device_list_from_udev(0); } } if (!dev_cache_add_dir(cv->v.str)) { log_error("Failed to add %s to internal device cache", cv->v.str); return 0; } } return 1; } #define MAX_FILTERS 10 static struct dev_filter *_init_filter_chain(struct cmd_context *cmd) { int nr_filt = 0; const struct dm_config_node *cn; struct dev_filter *filters[MAX_FILTERS] = { 0 }; struct dev_filter *composite; /* * Filters listed in order: top one gets applied first. * Failure to initialise some filters is not fatal. * Update MAX_FILTERS definition above when adding new filters. */ /* global regex filter. Optional. */ if ((cn = find_config_tree_node(cmd, devices_global_filter_CFG, NULL))) { if (!(filters[nr_filt] = regex_filter_create(cn->v, 0, 1))) { log_error("Failed to create global regex device filter"); goto bad; } nr_filt++; } /* regex filter. Optional. */ if ((cn = find_config_tree_node(cmd, devices_filter_CFG, NULL))) { if (!(filters[nr_filt] = regex_filter_create(cn->v, 1, 0))) { log_error("Failed to create regex device filter"); goto bad; } nr_filt++; } /* device type filter. Required. */ if (!(filters[nr_filt] = lvm_type_filter_create(cmd->dev_types))) { log_error("Failed to create lvm type filter"); goto bad; } nr_filt++; /* filter based on the device_ids saved in the devices file */ if (!(filters[nr_filt] = deviceid_filter_create(cmd))) { log_error("Failed to create deviceid device filter"); goto bad; } nr_filt++; /* * sysfs filter. Only available on 2.6 kernels. Non-critical. * Eliminates unavailable devices. * TODO: this may be unnecessary now with device ids * (currently not used for devs match to device id using syfs) */ if (find_config_tree_bool(cmd, devices_sysfs_scan_CFG, NULL)) { if ((filters[nr_filt] = sysfs_filter_create(dm_sysfs_dir()))) nr_filt++; } /* usable device filter. Required. */ if (!(filters[nr_filt] = usable_filter_create(cmd, cmd->dev_types, FILTER_MODE_NO_LVMETAD))) { log_error("Failed to create usabled device filter"); goto bad; } nr_filt++; /* mpath component filter. Optional, non-critical. */ if (find_config_tree_bool(cmd, devices_multipath_component_detection_CFG, NULL)) { if ((filters[nr_filt] = mpath_filter_create(cmd->dev_types))) nr_filt++; } /* partitioned device filter. Required. */ if (!(filters[nr_filt] = partitioned_filter_create(cmd->dev_types))) { log_error("Failed to create partitioned device filter"); goto bad; } nr_filt++; /* signature filter. Required. */ if (!(filters[nr_filt] = signature_filter_create(cmd->dev_types))) { log_error("Failed to create signature device filter"); goto bad; } nr_filt++; /* md component filter. Optional, non-critical. */ if (find_config_tree_bool(cmd, devices_md_component_detection_CFG, NULL)) { init_md_filtering(1); if ((filters[nr_filt] = md_filter_create(cmd, cmd->dev_types))) nr_filt++; } /* firmware raid filter. Optional, non-critical. */ if (find_config_tree_bool(cmd, devices_fw_raid_component_detection_CFG, NULL)) { init_fwraid_filtering(1); if ((filters[nr_filt] = fwraid_filter_create(cmd->dev_types))) nr_filt++; } if (!(composite = composite_filter_create(nr_filt, filters))) goto_bad; return composite; bad: while (--nr_filt >= 0) filters[nr_filt]->destroy(filters[nr_filt]); return NULL; } /* * cmd->filter == * persistent(cache) filter -> sysfs filter -> internal filter -> global regex filter -> * regex_filter -> type filter -> usable device filter -> * mpath component filter -> partitioned filter -> md component filter -> fw raid filter * */ int init_filters(struct cmd_context *cmd, unsigned load_persistent_cache) { struct dev_filter *pfilter, *filter = NULL, *filter_components[2] = {0}; if (!cmd->initialized.connections) { log_error(INTERNAL_ERROR "connections must be initialized before filters"); return 0; } filter = _init_filter_chain(cmd); if (!filter) goto_bad; init_ignore_suspended_devices(find_config_tree_bool(cmd, devices_ignore_suspended_devices_CFG, NULL)); init_ignore_lvm_mirrors(find_config_tree_bool(cmd, devices_ignore_lvm_mirrors_CFG, NULL)); /* * persisent filter is a cache of the previous result real filter result. * If a dev is found in persistent filter, the pass/fail result saved by * the pfilter is used. If a dev does not existing in the persistent * filter, the dev is passed on to the real filter, and when the result * of the real filter is saved in the persistent filter. * * FIXME: we should apply the filter once at the start of the command, * and not call the filters repeatedly. In that case we would not need * the persistent/caching filter layer. */ if (!(pfilter = persistent_filter_create(cmd->dev_types, filter))) { log_verbose("Failed to create persistent device filter."); goto bad; } cmd->filter = pfilter; cmd->initialized.filters = 1; return 1; bad: if (!filter) { /* * composite filter not created - destroy * each component directly */ if (filter_components[0]) filter_components[0]->destroy(filter_components[0]); if (filter_components[1]) filter_components[1]->destroy(filter_components[1]); } else { /* * composite filter created - destroy it - this * will also destroy any of its components */ filter->destroy(filter); } cmd->initialized.filters = 0; return 0; } struct format_type *get_format_by_name(struct cmd_context *cmd, const char *format) { struct format_type *fmt; dm_list_iterate_items(fmt, &cmd->formats) if (!strcasecmp(fmt->name, format) || !strcasecmp(fmt->name + 3, format) || (fmt->alias && !strcasecmp(fmt->alias, format))) return fmt; return NULL; } /* FIXME: there's only one format, get rid of the list of formats */ static int _init_formats(struct cmd_context *cmd) { struct format_type *fmt; if (!(fmt = create_text_format(cmd))) return 0; dm_list_add(&cmd->formats, &fmt->list); cmd->fmt_backup = fmt; cmd->default_settings.fmt_name = fmt->name; cmd->fmt = fmt; return 1; } int init_lvmcache_orphans(struct cmd_context *cmd) { struct format_type *fmt; dm_list_iterate_items(fmt, &cmd->formats) if (!lvmcache_add_orphan_vginfo(cmd, fmt->orphan_vg_name, fmt)) return_0; return 1; } struct segtype_library { struct cmd_context *cmd; void *lib; const char *libname; }; int lvm_register_segtype(struct segtype_library *seglib, struct segment_type *segtype) { struct segment_type *segtype2; segtype->library = seglib->lib; dm_list_iterate_items(segtype2, &seglib->cmd->segtypes) { if (strcmp(segtype2->name, segtype->name)) continue; log_error("Duplicate segment type %s: " "unloading shared library %s", segtype->name, seglib->libname); segtype->ops->destroy(segtype); return 0; } dm_list_add(&seglib->cmd->segtypes, &segtype->list); return 1; } static int _init_segtypes(struct cmd_context *cmd) { int i; struct segment_type *segtype; struct segtype_library seglib = { .cmd = cmd, .lib = NULL }; struct segment_type *(*init_segtype_array[])(struct cmd_context *cmd) = { init_linear_segtype, init_striped_segtype, init_zero_segtype, init_error_segtype, /* disabled until needed init_free_segtype, */ #ifdef SNAPSHOT_INTERNAL init_snapshot_segtype, #endif #ifdef MIRRORED_INTERNAL init_mirrored_segtype, #endif NULL }; for (i = 0; init_segtype_array[i]; i++) { if (!(segtype = init_segtype_array[i](cmd))) return 0; segtype->library = NULL; dm_list_add(&cmd->segtypes, &segtype->list); } #ifdef RAID_INTERNAL if (!init_raid_segtypes(cmd, &seglib)) return 0; #endif #ifdef THIN_INTERNAL if (!init_thin_segtypes(cmd, &seglib)) return 0; #endif #ifdef CACHE_INTERNAL if (!init_cache_segtypes(cmd, &seglib)) return 0; #endif #ifdef VDO_INTERNAL if (!init_vdo_segtypes(cmd, &seglib)) return_0; #endif #ifdef WRITECACHE_INTERNAL if (!init_writecache_segtypes(cmd, &seglib)) return 0; #endif #ifdef INTEGRITY_INTERNAL if (!init_integrity_segtypes(cmd, &seglib)) return 0; #endif return 1; } static int _init_hostname(struct cmd_context *cmd) { struct utsname uts; if (uname(&uts)) { log_sys_error("uname", "_init_hostname"); return 0; } if (!(cmd->hostname = dm_pool_strdup(cmd->libmem, uts.nodename))) { log_error("_init_hostname: dm_pool_strdup failed"); return 0; } if (!(cmd->kernel_vsn = dm_pool_strdup(cmd->libmem, uts.release))) { log_error("_init_hostname: dm_pool_strdup kernel_vsn failed"); return 0; } return 1; } static int _init_backup(struct cmd_context *cmd) { uint32_t days, min; const char *dir; if (!cmd->system_dir[0]) { log_warn("WARNING: Metadata changes will NOT be backed up"); backup_init(cmd, "", 0); archive_init(cmd, "", 0, 0, 0); return 1; } /* set up archiving */ cmd->default_settings.archive = find_config_tree_bool(cmd, backup_archive_CFG, NULL); days = (uint32_t) find_config_tree_int(cmd, backup_retain_days_CFG, NULL); min = (uint32_t) find_config_tree_int(cmd, backup_retain_min_CFG, NULL); if (!(dir = find_config_tree_str(cmd, backup_archive_dir_CFG, NULL))) return_0; if (!archive_init(cmd, dir, days, min, cmd->default_settings.archive)) { log_debug("archive_init failed."); return 0; } /* set up the backup */ cmd->default_settings.backup = find_config_tree_bool(cmd, backup_backup_CFG, NULL); if (!(dir = find_config_tree_str(cmd, backup_backup_dir_CFG, NULL))) return_0; if (!backup_init(cmd, dir, cmd->default_settings.backup)) { log_debug("backup_init failed."); return 0; } return 1; } static void _init_rand(struct cmd_context *cmd) { if (read_urandom(&cmd->rand_seed, sizeof(cmd->rand_seed))) { reset_lvm_errno(1); return; } cmd->rand_seed = (unsigned) ((time(NULL) + getpid()) & 0xffffffff); reset_lvm_errno(1); } static void _init_globals(struct cmd_context *cmd) { init_mirror_in_sync(0); } static int _init_lvmpolld(struct cmd_context *cmd) { const char *lvmpolld_socket; lvmpolld_disconnect(); lvmpolld_socket = getenv("LVM_LVMPOLLD_SOCKET"); if (!lvmpolld_socket) lvmpolld_socket = DEFAULT_RUN_DIR "/lvmpolld.socket"; lvmpolld_set_socket(lvmpolld_socket); lvmpolld_set_active(find_config_tree_bool(cmd, global_use_lvmpolld_CFG, NULL)); return 1; } int init_connections(struct cmd_context *cmd) { if (!_init_lvmpolld(cmd)) { log_error("Failed to initialize lvmpolld connection."); goto bad; } cmd->initialized.connections = 1; return 1; bad: cmd->initialized.connections = 0; return 0; } int init_run_by_dmeventd(struct cmd_context *cmd) { init_dmeventd_monitor(DMEVENTD_MONITOR_IGNORE); init_ignore_suspended_devices(1); init_disable_dmeventd_monitoring(1); /* Lock settings */ cmd->run_by_dmeventd = 1; return 0; } void destroy_config_context(struct cmd_context *cmd) { _destroy_config(cmd); if (cmd->mem) dm_pool_destroy(cmd->mem); if (cmd->libmem) dm_pool_destroy(cmd->libmem); if (cmd->pending_delete_mem) dm_pool_destroy(cmd->pending_delete_mem); free(cmd); } /* * A "config context" is a very light weight toolcontext that * is only used for reading config settings from lvm.conf. * * FIXME: this needs to go back to parametrized create_toolcontext() */ struct cmd_context *create_config_context(void) { struct cmd_context *cmd; if (!(cmd = zalloc(sizeof(*cmd)))) goto_out; strncpy(cmd->system_dir, DEFAULT_SYS_DIR, sizeof(cmd->system_dir) - 1); if (!_get_env_vars(cmd)) goto_out; if (!(cmd->libmem = dm_pool_create("library", 4 * 1024))) goto_out; if (!(cmd->mem = dm_pool_create("command", 4 * 1024))) goto out; if (!(cmd->pending_delete_mem = dm_pool_create("pending_delete", 1024))) goto_out; dm_list_init(&cmd->config_files); dm_list_init(&cmd->tags); if (!_init_lvm_conf(cmd)) goto_out; if (!_init_hostname(cmd)) goto_out; if (!_init_tags(cmd, cmd->cft)) goto_out; /* Load lvmlocal.conf */ if (*cmd->system_dir && !_load_config_file(cmd, "", 1)) goto_out; if (!_init_tag_configs(cmd)) goto_out; if (!(cmd->cft = _merge_config_files(cmd, cmd->cft))) goto_out; return cmd; out: if (cmd) destroy_config_context(cmd); return NULL; } /* Entry point */ struct cmd_context *create_toolcontext(unsigned is_clvmd, const char *system_dir, unsigned set_buffering, unsigned threaded, unsigned set_connections, unsigned set_filters) { struct cmd_context *cmd; #ifdef M_MMAP_MAX mallopt(M_MMAP_MAX, 0); #endif if (!setlocale(LC_ALL, "")) log_very_verbose("setlocale failed"); #ifdef INTL_PACKAGE bindtextdomain(INTL_PACKAGE, LOCALEDIR); #endif if (!(cmd = zalloc(sizeof(*cmd)))) { log_error("Failed to allocate command context"); return NULL; } cmd->is_long_lived = is_clvmd; cmd->is_clvmd = is_clvmd; cmd->threaded = threaded ? 1 : 0; cmd->handles_missing_pvs = 0; cmd->handles_unknown_segments = 0; cmd->hosttags = 0; cmd->check_devs_used = 1; dm_list_init(&cmd->arg_value_groups); dm_list_init(&cmd->formats); dm_list_init(&cmd->segtypes); dm_list_init(&cmd->tags); dm_list_init(&cmd->config_files); label_init(); /* FIXME Make this configurable? */ reset_lvm_errno(1); #ifndef VALGRIND_POOL /* Set in/out stream buffering before glibc */ if (set_buffering #ifdef SYS_gettid /* For threaded programs no changes of streams */ /* On linux gettid() is implemented only via syscall */ && (syscall(SYS_gettid) == getpid()) #endif ) { int flags; /* Allocate 2 buffers */ if (!(cmd->linebuffer = malloc(2 * _linebuffer_size))) { log_error("Failed to allocate line buffer."); goto out; } /* nohup might set stdin O_WRONLY ! */ if (is_valid_fd(STDIN_FILENO) && ((flags = fcntl(STDIN_FILENO, F_GETFL)) > 0) && (flags & O_ACCMODE) != O_WRONLY) { if (!reopen_standard_stream(&stdin, "r")) goto_out; if (setvbuf(stdin, cmd->linebuffer, _IOLBF, _linebuffer_size)) { log_sys_error("setvbuf", ""); goto out; } } if (is_valid_fd(STDOUT_FILENO) && ((flags = fcntl(STDOUT_FILENO, F_GETFL)) > 0) && (flags & O_ACCMODE) != O_RDONLY) { if (!reopen_standard_stream(&stdout, "w")) goto_out; if (setvbuf(stdout, cmd->linebuffer + _linebuffer_size, _IOLBF, _linebuffer_size)) { log_sys_error("setvbuf", ""); goto out; } } /* Buffers are used for lines without '\n' */ } else if (!set_buffering) /* Without buffering, must not use stdin/stdout */ init_silent(1); #endif /* * Environment variable LVM_SYSTEM_DIR overrides this below. */ strncpy(cmd->system_dir, (system_dir) ? system_dir : DEFAULT_SYS_DIR, sizeof(cmd->system_dir) - 1); if (!_get_env_vars(cmd)) goto_out; /* Create system directory if it doesn't already exist */ if (*cmd->system_dir && !dm_create_dir(cmd->system_dir)) { log_error("Failed to create LVM2 system dir for metadata backups, config " "files and internal cache."); log_error("Set environment variable LVM_SYSTEM_DIR to alternative location " "or empty string."); goto out; } if (!(cmd->libmem = dm_pool_create("library", 4 * 1024))) { log_error("Library memory pool creation failed"); goto out; } if (!(cmd->mem = dm_pool_create("command", 4 * 1024))) { log_error("Command memory pool creation failed"); goto out; } if (!(cmd->pending_delete_mem = dm_pool_create("pending_delete", 1024))) goto_out; if (!_init_lvm_conf(cmd)) goto_out; _init_logging(cmd); if (!_init_hostname(cmd)) goto_out; if (!_init_tags(cmd, cmd->cft)) goto_out; /* Load lvmlocal.conf */ if (*cmd->system_dir && !_load_config_file(cmd, "", 1)) goto_out; if (!_init_tag_configs(cmd)) goto_out; if (!(cmd->cft = _merge_config_files(cmd, cmd->cft))) goto_out; if (!_process_config(cmd)) goto_out; if (!_init_profiles(cmd)) goto_out; if (!(cmd->dev_types = create_dev_types(cmd->proc_dir, find_config_tree_array(cmd, devices_types_CFG, NULL)))) goto_out; init_use_aio(find_config_tree_bool(cmd, global_use_aio_CFG, NULL)); if (!_init_dev_cache(cmd)) goto_out; devices_file_init(cmd); memlock_init(cmd); if (!_init_formats(cmd)) goto_out; if (!lvmcache_init(cmd)) goto_out; /* FIXME: move into lvmcache_init */ if (!init_lvmcache_orphans(cmd)) goto_out; if (!_init_segtypes(cmd)) goto_out; if (!_init_backup(cmd)) goto_out; _init_rand(cmd); _init_globals(cmd); if (set_connections && !init_connections(cmd)) goto_out; if (set_filters && !init_filters(cmd, 1)) goto_out; cmd->current_settings = cmd->default_settings; cmd->initialized.config = 1; dm_list_init(&cmd->pending_delete); out: if (!cmd->initialized.config) { destroy_toolcontext(cmd); cmd = NULL; } return cmd; } static void _destroy_formats(struct cmd_context *cmd, struct dm_list *formats) { struct dm_list *fmtl, *tmp; struct format_type *fmt; dm_list_iterate_safe(fmtl, tmp, formats) { fmt = dm_list_item(fmtl, struct format_type); dm_list_del(&fmt->list); fmt->ops->destroy(fmt); } } static void _destroy_segtypes(struct dm_list *segtypes) { struct dm_list *sgtl, *tmp; struct segment_type *segtype; dm_list_iterate_safe(sgtl, tmp, segtypes) { segtype = dm_list_item(sgtl, struct segment_type); dm_list_del(&segtype->list); segtype->ops->destroy(segtype); } } static void _destroy_dev_types(struct cmd_context *cmd) { if (!cmd->dev_types) return; free(cmd->dev_types); cmd->dev_types = NULL; } static void _destroy_filters(struct cmd_context *cmd) { if (cmd->filter) { cmd->filter->destroy(cmd->filter); cmd->filter = NULL; } cmd->initialized.filters = 0; } int refresh_filters(struct cmd_context *cmd) { int r, saved_ignore_suspended_devices = ignore_suspended_devices(); if (!cmd->initialized.filters) /* if filters not initialized, there's nothing to refresh */ return 1; _destroy_filters(cmd); if (!(r = init_filters(cmd, 0))) stack; /* * During repair code must not reset suspended flag. */ init_ignore_suspended_devices(saved_ignore_suspended_devices); return r; } int refresh_toolcontext(struct cmd_context *cmd) { struct dm_config_tree *cft_cmdline, *cft_tmp; const char *profile_command_name, *profile_metadata_name; struct profile *profile; log_verbose("Reloading config files"); /* * Don't update the persistent filter cache as we will * perform a full rescan. */ activation_release(); hints_exit(cmd); lvmcache_destroy(cmd, 0, 0); label_scan_destroy(cmd); label_exit(); _destroy_segtypes(&cmd->segtypes); _destroy_formats(cmd, &cmd->formats); if (!dev_cache_exit()) stack; _destroy_dev_types(cmd); _destroy_tags(cmd); /* save config string passed on the command line */ cft_cmdline = remove_config_tree_by_source(cmd, CONFIG_STRING); /* save the global profile name used */ profile_command_name = cmd->profile_params->global_command_profile ? cmd->profile_params->global_command_profile->name : NULL; profile_metadata_name = cmd->profile_params->global_metadata_profile ? cmd->profile_params->global_metadata_profile->name : NULL; _destroy_config(cmd); cmd->initialized.config = 0; cmd->hosttags = 0; cmd->lib_dir = NULL; cmd->lvcreate_vcp = NULL; if (!_init_lvm_conf(cmd)) return_0; /* Temporary duplicate cft pointer holding lvm.conf - replaced later */ cft_tmp = cmd->cft; if (cft_cmdline) cmd->cft = dm_config_insert_cascaded_tree(cft_cmdline, cft_tmp); /* Reload the global profile. */ if (profile_command_name) { if (!(profile = add_profile(cmd, profile_command_name, CONFIG_PROFILE_COMMAND)) || !override_config_tree_from_profile(cmd, profile)) return_0; } if (profile_metadata_name) { if (!(profile = add_profile(cmd, profile_metadata_name, CONFIG_PROFILE_METADATA)) || !override_config_tree_from_profile(cmd, profile)) return_0; } /* Uses cmd->cft i.e. cft_cmdline + lvm.conf */ _init_logging(cmd); /* Init tags from lvm.conf. */ if (!_init_tags(cmd, cft_tmp)) return_0; /* Load lvmlocal.conf */ if (*cmd->system_dir && !_load_config_file(cmd, "", 1)) return_0; /* Doesn't change cmd->cft */ if (!_init_tag_configs(cmd)) return_0; /* Merge all the tag config files with lvm.conf, returning a * fresh cft pointer in place of cft_tmp. */ if (!(cmd->cft = _merge_config_files(cmd, cft_tmp))) return_0; /* Finally we can make the proper, fully-merged, cmd->cft */ if (cft_cmdline) cmd->cft = dm_config_insert_cascaded_tree(cft_cmdline, cmd->cft); if (!_process_config(cmd)) return_0; if (!_init_profiles(cmd)) return_0; if (!(cmd->dev_types = create_dev_types(cmd->proc_dir, find_config_tree_array(cmd, devices_types_CFG, NULL)))) return_0; if (!_init_dev_cache(cmd)) return_0; devices_file_init(cmd); if (!_init_formats(cmd)) return_0; if (!lvmcache_init(cmd)) return_0; if (!init_lvmcache_orphans(cmd)) return_0; if (!_init_segtypes(cmd)) return_0; if (!_init_backup(cmd)) return_0; cmd->initialized.config = 1; if (!dm_list_empty(&cmd->pending_delete)) { log_debug(INTERNAL_ERROR "Unprocessed pending delete for %d devices.", dm_list_size(&cmd->pending_delete)); dm_list_init(&cmd->pending_delete); } if (cmd->initialized.connections && !init_connections(cmd)) return_0; if (!refresh_filters(cmd)) return_0; reset_lvm_errno(1); return 1; } void destroy_toolcontext(struct cmd_context *cmd) { struct dm_config_tree *cft_cmdline; archive_exit(cmd); backup_exit(cmd); hints_exit(cmd); lvmcache_destroy(cmd, 0, 0); label_scan_destroy(cmd); label_exit(); _destroy_segtypes(&cmd->segtypes); _destroy_formats(cmd, &cmd->formats); _destroy_filters(cmd); dev_cache_exit(); _destroy_dev_types(cmd); _destroy_tags(cmd); if ((cft_cmdline = remove_config_tree_by_source(cmd, CONFIG_STRING))) config_destroy(cft_cmdline); if (cmd->cft_def_hash) dm_hash_destroy(cmd->cft_def_hash); dm_device_list_destroy(&cmd->cache_dm_devs); #ifndef VALGRIND_POOL if (cmd->linebuffer) { int flags; /* Reset stream buffering to defaults */ if (is_valid_fd(STDIN_FILENO) && ((flags = fcntl(STDIN_FILENO, F_GETFL)) > 0) && (flags & O_ACCMODE) != O_WRONLY) { if (reopen_standard_stream(&stdin, "r")) setlinebuf(stdin); else cmd->linebuffer = NULL; /* Leave buffer in place (deliberate leak) */ } if (is_valid_fd(STDOUT_FILENO) && ((flags = fcntl(STDOUT_FILENO, F_GETFL)) > 0) && (flags & O_ACCMODE) != O_RDONLY) { if (reopen_standard_stream(&stdout, "w")) setlinebuf(stdout); else cmd->linebuffer = NULL; /* Leave buffer in place (deliberate leak) */ } free(cmd->linebuffer); } #endif destroy_config_context(cmd); lvmpolld_disconnect(); activation_exit(); reset_log_duplicated(); fin_log(); fin_syslog(); reset_lvm_errno(0); }