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-rw-r--r--config.c1358
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diff --git a/config.c b/config.c
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--- /dev/null
+++ b/config.c
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+/*
+ * mdadm - manage Linux "md" devices aka RAID arrays.
+ *
+ * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Neil Brown
+ * Email: <neilb@suse.de>
+ */
+
+#include "mdadm.h"
+#include "dlink.h"
+#include <dirent.h>
+#include <glob.h>
+#include <fnmatch.h>
+#include <ctype.h>
+#include <pwd.h>
+#include <grp.h>
+
+/*
+ * Read the config file
+ *
+ * conf_get_uuids gets a list of devicename+uuid pairs
+ * conf_get_devs gets device names after expanding wildcards
+ *
+ * Each keeps the returned list and frees it when asked to make
+ * a new list.
+ *
+ * The format of the config file needs to be fairly extensible.
+ * Now, arrays only have names and uuids and devices merely are.
+ * But later arrays might want names, and devices might want superblock
+ * versions, and who knows what else.
+ * I like free format, abhore backslash line continuation, adore
+ * indentation for structure and am ok about # comments.
+ *
+ * So, each line that isn't blank or a #comment must either start
+ * with a key word, and not be indented, or must start with a
+ * non-key-word and must be indented.
+ *
+ * Keywords are DEVICE and ARRAY ... and several others.
+ * DEV{ICE} introduces some devices that might contain raid components.
+ * e.g.
+ * DEV style=0 /dev/sda* /dev/hd*
+ * DEV style=1 /dev/sd[b-f]*
+ * ARR{AY} describes an array giving md device and attributes like uuid=whatever
+ * e.g.
+ * ARRAY /dev/md0 uuid=whatever name=something
+ * Spaces separate words on each line. Quoting, with "" or '' protects them,
+ * but may not wrap over lines
+ *
+ */
+#ifndef _POSIX_C_SOURCE
+#define _POSIX_C_SOURCE 200809L
+#endif
+
+#ifndef CONFFILE
+#define CONFFILE "/etc/mdadm.conf"
+#endif
+#ifndef CONFFILE2
+/* for Debian compatibility .... */
+#define CONFFILE2 "/etc/mdadm/mdadm.conf"
+#endif
+char DefaultConfFile[] = CONFFILE;
+char DefaultConfDir[] = CONFFILE ".d";
+char DefaultAltConfFile[] = CONFFILE2;
+char DefaultAltConfDir[] = CONFFILE2 ".d";
+
+enum linetype { Devices, Array, Mailaddr, Mailfrom, Program, CreateDev,
+ Homehost, HomeCluster, AutoMode, Policy, PartPolicy, Sysfs,
+ MonitorDelay, LTEnd };
+char *keywords[] = {
+ [Devices] = "devices",
+ [Array] = "array",
+ [Mailaddr] = "mailaddr",
+ [Mailfrom] = "mailfrom",
+ [Program] = "program",
+ [CreateDev]= "create",
+ [Homehost] = "homehost",
+ [HomeCluster] = "homecluster",
+ [AutoMode] = "auto",
+ [Policy] = "policy",
+ [PartPolicy]="part-policy",
+ [Sysfs] = "sysfs",
+ [MonitorDelay] = "monitordelay",
+ [LTEnd] = NULL
+};
+
+/*
+ * match_keyword returns an index into the keywords array, or -1 for no match
+ * case is ignored, and at least three characters must be given
+ */
+
+int match_keyword(char *word)
+{
+ int len = strlen(word);
+ int n;
+
+ if (len < 3)
+ return -1;
+ for (n = 0; keywords[n]; n++) {
+ if (strncasecmp(word, keywords[n], len) == 0)
+ return n;
+ }
+
+ return -1;
+}
+
+/**
+ * is_devname_ignore() - check if &devname is a special "<ignore>" keyword.
+ */
+bool is_devname_ignore(const char *devname)
+{
+ static const char keyword[] = "<ignore>";
+
+ if (strcasecmp(devname, keyword) == 0)
+ return true;
+ return false;
+}
+
+/**
+ * ident_log() - generate and write message to the user.
+ * @param_name: name of the property.
+ * @value: value of the property.
+ * @reason: meaningful description.
+ * @cmdline: context dependent actions, see below.
+ *
+ * The function is made to provide similar error handling for both config and cmdline. The behavior
+ * is configurable via @cmdline. Message has following format:
+ * "Value "@value" cannot be set for @param_name. Reason: @reason."
+ *
+ * If cmdline is on:
+ * - message is written to stderr.
+ * otherwise:
+ * - message is written to stdout.
+ * - "Value ignored" is added at the end of the message.
+ */
+static void ident_log(const char *param_name, const char *value, const char *reason,
+ const bool cmdline)
+{
+ if (cmdline == true)
+ pr_err("Value \"%s\" cannot be set as %s. Reason: %s.\n", value, param_name,
+ reason);
+ else
+ pr_info("Value \"%s\" cannot be set as %s. Reason: %s. Value ignored.\n", value,
+ param_name, reason);
+}
+
+/**
+ * ident_init() - Set defaults.
+ * @ident: ident pointer, not NULL.
+ */
+inline void ident_init(struct mddev_ident *ident)
+{
+ assert(ident);
+
+ ident->assembled = false;
+ ident->autof = 0;
+ ident->bitmap_fd = -1;
+ ident->bitmap_file = NULL;
+ ident->container = NULL;
+ ident->devices = NULL;
+ ident->devname = NULL;
+ ident->level = UnSet;
+ ident->member = NULL;
+ ident->name[0] = 0;
+ ident->next = NULL;
+ ident->raid_disks = UnSet;
+ ident->spare_group = NULL;
+ ident->spare_disks = 0;
+ ident->st = NULL;
+ ident->super_minor = UnSet;
+ ident->uuid[0] = 0;
+ ident->uuid_set = 0;
+}
+
+/**
+ * _ident_set_devname()- verify devname and set it in &mddev_ident.
+ * @ident: pointer to &mddev_ident.
+ * @devname: devname to be set.
+ * @cmdline: context dependent actions. If set, ignore keyword is not allowed.
+ *
+ * @devname can have following forms:
+ * '<ignore>' keyword (if allowed)
+ * /dev/md{number}
+ * /dev/md_d{number} (legacy)
+ * /dev/md_{name}
+ * /dev/md/{name}
+ * {name}
+ *
+ * {name} must follow name's criteria and be POSIX compatible.
+ * If criteria passed, duplicate memory and set devname in @ident.
+ *
+ * Return: %MDADM_STATUS_SUCCESS or %MDADM_STATUS_ERROR.
+ */
+mdadm_status_t _ident_set_devname(struct mddev_ident *ident, const char *devname,
+ const bool cmdline)
+{
+ assert(ident);
+ assert(devname);
+
+ static const char named_dev_pref[] = DEV_NUM_PREF "_";
+ static const int named_dev_pref_size = sizeof(named_dev_pref) - 1;
+ const char *prop_name = "devname";
+ const char *name;
+
+ if (ident->devname) {
+ ident_log(prop_name, devname, "Already defined", cmdline);
+ return MDADM_STATUS_ERROR;
+ }
+
+ if (is_devname_ignore(devname) == true) {
+ if (!cmdline)
+ goto pass;
+
+ ident_log(prop_name, devname, "Special keyword is invalid in this context",
+ cmdline);
+ return MDADM_STATUS_ERROR;
+ }
+
+ if (is_devname_md_numbered(devname) == true || is_devname_md_d_numbered(devname) == true)
+ goto pass;
+
+ if (strncmp(devname, DEV_MD_DIR, DEV_MD_DIR_LEN) == 0)
+ name = devname + DEV_MD_DIR_LEN;
+ else if (strncmp(devname, named_dev_pref, named_dev_pref_size) == 0)
+ name = devname + named_dev_pref_size;
+ else
+ name = devname;
+
+ if (is_name_posix_compatible(name) == false) {
+ ident_log(prop_name, name, "Not POSIX compatible", cmdline);
+ return MDADM_STATUS_ERROR;
+ }
+
+ if (is_string_lq(name, MD_NAME_MAX + 1) == false) {
+ ident_log(prop_name, devname, "Invalid length", cmdline);
+ return MDADM_STATUS_ERROR;
+ }
+pass:
+ ident->devname = xstrdup(devname);
+ return MDADM_STATUS_SUCCESS;
+}
+
+/**
+ * _ident_set_name()- set name in &mddev_ident.
+ * @ident: pointer to &mddev_ident.
+ * @name: name to be set.
+ * @cmdline: context dependent actions.
+ *
+ * If criteria passed, set name in @ident.
+ * Note: name is not used by config file, it for cmdline only.
+ *
+ * Return: %MDADM_STATUS_SUCCESS or %MDADM_STATUS_ERROR.
+ */
+static mdadm_status_t _ident_set_name(struct mddev_ident *ident, const char *name,
+ const bool cmdline)
+{
+ assert(name);
+ assert(ident);
+
+ const char *prop_name = "name";
+
+ if (ident->name[0]) {
+ ident_log(prop_name, name, "Already defined", cmdline);
+ return MDADM_STATUS_ERROR;
+ }
+
+ if (is_string_lq(name, MD_NAME_MAX + 1) == false) {
+ ident_log(prop_name, name, "Too long or empty", cmdline);
+ return MDADM_STATUS_ERROR;
+ }
+
+ if (is_name_posix_compatible(name) == false) {
+ ident_log(prop_name, name, "Not POSIX compatible", cmdline);
+ return MDADM_STATUS_ERROR;
+ }
+
+ snprintf(ident->name, MD_NAME_MAX + 1, "%s", name);
+ return MDADM_STATUS_SUCCESS;
+}
+
+/**
+ * ident_set_devname()- exported, for cmdline.
+ */
+mdadm_status_t ident_set_devname(struct mddev_ident *ident, const char *name)
+{
+ return _ident_set_devname(ident, name, true);
+}
+
+/**
+ * ident_set_name()- exported, for cmdline.
+ */
+mdadm_status_t ident_set_name(struct mddev_ident *ident, const char *name)
+{
+ return _ident_set_name(ident, name, true);
+}
+
+struct conf_dev {
+ struct conf_dev *next;
+ char *name;
+} *cdevlist = NULL;
+
+struct mddev_dev *load_partitions(void)
+{
+ FILE *f = fopen("/proc/partitions", "r");
+ char buf[1024];
+ struct mddev_dev *rv = NULL;
+
+ if (f == NULL) {
+ pr_err("cannot open /proc/partitions\n");
+ return NULL;
+ }
+ while (fgets(buf, 1024, f)) {
+ int major, minor;
+ char *name, *mp;
+ struct mddev_dev *d;
+
+ buf[1023] = '\0';
+ if (buf[0] != ' ')
+ continue;
+ major = strtoul(buf, &mp, 10);
+ if (mp == buf || *mp != ' ')
+ continue;
+ minor = strtoul(mp, NULL, 10);
+
+ name = map_dev(major, minor, 1);
+ if (!name)
+ continue;
+ d = xcalloc(1, sizeof(*d));
+ d->devname = xstrdup(name);
+ d->next = rv;
+ rv = d;
+ }
+ fclose(f);
+ return rv;
+}
+
+struct mddev_dev *load_containers(void)
+{
+ struct mdstat_ent *mdstat = mdstat_read(0, 0);
+ struct mdstat_ent *ent;
+ struct mddev_dev *d;
+ struct mddev_dev *rv = NULL;
+ struct map_ent *map = NULL, *me;
+
+ if (!mdstat)
+ return NULL;
+
+ for (ent = mdstat; ent; ent = ent->next)
+ if (ent->metadata_version &&
+ strncmp(ent->metadata_version, "external:", 9) == 0 &&
+ !is_subarray(&ent->metadata_version[9])) {
+ d = xcalloc(1, sizeof(*d));
+ me = map_by_devnm(&map, ent->devnm);
+ if (me)
+ d->devname = xstrdup(me->path);
+ else if (asprintf(&d->devname, "/dev/%s", ent->devnm) < 0) {
+ free(d);
+ continue;
+ }
+ d->next = rv;
+ rv = d;
+ map_free(map);
+ map = NULL;
+ }
+ free_mdstat(mdstat);
+
+ return rv;
+}
+
+struct createinfo createinfo = {
+ .autof = 2, /* by default, create devices with standard names */
+ .names = 0, /* By default, stick with numbered md devices. */
+ .bblist = 1, /* Use a bad block list by default */
+#ifdef DEBIAN
+ .gid = 6, /* disk */
+ .mode = 0660,
+#else
+ .mode = 0600,
+#endif
+};
+
+int parse_auto(char *str, char *msg, int config)
+{
+ int autof;
+ if (str == NULL || *str == 0)
+ autof = 2;
+ else if (strcasecmp(str, "no") == 0)
+ autof = 1;
+ else if (strcasecmp(str, "yes") == 0)
+ autof = 2;
+ else if (strcasecmp(str, "md") == 0)
+ autof = config ? 5:3;
+ else {
+ /* There might be digits, and maybe a hypen, at the end */
+ char *e = str + strlen(str);
+ int num = 4;
+ int len;
+ while (e > str && isdigit(e[-1]))
+ e--;
+ if (*e) {
+ num = atoi(e);
+ if (num <= 0)
+ num = 1;
+ }
+ if (e > str && e[-1] == '-')
+ e--;
+ len = e - str;
+ if ((len == 2 && strncasecmp(str, "md", 2) == 0)) {
+ autof = config ? 5 : 3;
+ } else if ((len == 3 && strncasecmp(str, "yes", 3) == 0)) {
+ autof = 2;
+ } else if ((len == 3 && strncasecmp(str, "mdp", 3) == 0)) {
+ autof = config ? 6 : 4;
+ } else if ((len == 1 && strncasecmp(str, "p", 1) == 0) ||
+ (len >= 4 && strncasecmp(str, "part", 4) == 0)) {
+ autof = 6;
+ } else {
+ pr_err("%s arg of \"%s\" unrecognised: use no,yes,md,mdp,part\n"
+ " optionally followed by a number.\n",
+ msg, str);
+ exit(2);
+ }
+ autof |= num << 3;
+ }
+ return autof;
+}
+
+static void createline(char *line)
+{
+ char *w;
+ char *ep;
+
+ for (w = dl_next(line); w != line; w = dl_next(w)) {
+ if (strncasecmp(w, "auto=", 5) == 0)
+ createinfo.autof = parse_auto(w + 5, "auto=", 1);
+ else if (strncasecmp(w, "owner=", 6) == 0) {
+ if (w[6] == 0) {
+ pr_err("missing owner name\n");
+ continue;
+ }
+ createinfo.uid = strtoul(w + 6, &ep, 10);
+ if (*ep != 0) {
+ struct passwd *pw;
+ /* must be a name */
+ pw = getpwnam(w + 6);
+ if (pw)
+ createinfo.uid = pw->pw_uid;
+ else
+ pr_err("CREATE user %s not found\n",
+ w + 6);
+ }
+ } else if (strncasecmp(w, "group=", 6) == 0) {
+ if (w[6] == 0) {
+ pr_err("missing group name\n");
+ continue;
+ }
+ createinfo.gid = strtoul(w + 6, &ep, 10);
+ if (*ep != 0) {
+ struct group *gr;
+ /* must be a name */
+ gr = getgrnam(w + 6);
+ if (gr)
+ createinfo.gid = gr->gr_gid;
+ else
+ pr_err("CREATE group %s not found\n",
+ w + 6);
+ }
+ } else if (strncasecmp(w, "mode=", 5) == 0) {
+ if (w[5] == 0) {
+ pr_err("missing CREATE mode\n");
+ continue;
+ }
+ createinfo.mode = strtoul(w + 5, &ep, 8);
+ if (*ep != 0) {
+ createinfo.mode = 0600;
+ pr_err("unrecognised CREATE mode %s\n",
+ w + 5);
+ }
+ } else if (strncasecmp(w, "metadata=", 9) == 0) {
+ /* style of metadata to use by default */
+ int i;
+ for (i = 0; superlist[i] && !createinfo.supertype; i++)
+ createinfo.supertype = superlist[i]->match_metadata_desc(w + 9);
+ if (!createinfo.supertype)
+ pr_err("metadata format %s unknown, ignoring\n",
+ w+9);
+ } else if (strncasecmp(w, "names=yes", 12) == 0)
+ createinfo.names = 1;
+ else if (strncasecmp(w, "names=no", 11) == 0)
+ createinfo.names = 0;
+ else if (strncasecmp(w, "bbl=no", 11) == 0)
+ createinfo.bblist = 0;
+ else if (strncasecmp(w, "bbl=yes", 11) == 0)
+ createinfo.bblist = 1;
+ else {
+ pr_err("unrecognised word on CREATE line: %s\n",
+ w);
+ }
+ }
+}
+
+void devline(char *line)
+{
+ char *w;
+ struct conf_dev *cd;
+
+ for (w = dl_next(line); w != line; w = dl_next(w)) {
+ if (w[0] == '/' || strcasecmp(w, "partitions") == 0 ||
+ strcasecmp(w, "containers") == 0) {
+ cd = xmalloc(sizeof(*cd));
+ cd->name = xstrdup(w);
+ cd->next = cdevlist;
+ cdevlist = cd;
+ } else {
+ pr_err("unreconised word on DEVICE line: %s\n", w);
+ }
+ }
+}
+
+struct mddev_ident *mddevlist = NULL;
+struct mddev_ident **mddevlp = &mddevlist;
+
+void arrayline(char *line)
+{
+ char *w;
+
+ struct mddev_ident mis;
+ struct mddev_ident *mi;
+
+ ident_init(&mis);
+
+ for (w = dl_next(line); w != line; w = dl_next(w)) {
+ if (w[0] == '/' || strchr(w, '=') == NULL) {
+ _ident_set_devname(&mis, w, false);
+ } else if (strncasecmp(w, "uuid=", 5) == 0) {
+ if (mis.uuid_set)
+ pr_err("only specify uuid once, %s ignored.\n",
+ w);
+ else {
+ if (parse_uuid(w + 5, mis.uuid))
+ mis.uuid_set = 1;
+ else
+ pr_err("bad uuid: %s\n", w);
+ }
+ } else if (strncasecmp(w, "super-minor=", 12) == 0) {
+ if (mis.super_minor != UnSet)
+ pr_err("only specify super-minor once, %s ignored.\n",
+ w);
+ else {
+ char *endptr;
+ int minor = strtol(w + 12, &endptr, 10);
+
+ if (w[12] == 0 || endptr[0] != 0 || minor < 0)
+ pr_err("invalid super-minor number: %s\n",
+ w);
+ else
+ mis.super_minor = minor;
+ }
+ } else if (strncasecmp(w, "name=", 5) == 0) {
+ /* Ignore name in confile */
+ continue;
+ } else if (strncasecmp(w, "bitmap=", 7) == 0) {
+ if (mis.bitmap_file)
+ pr_err("only specify bitmap file once. %s ignored\n",
+ w);
+ else
+ mis.bitmap_file = xstrdup(w + 7);
+
+ } else if (strncasecmp(w, "devices=", 8 ) == 0) {
+ if (mis.devices)
+ pr_err("only specify devices once (use a comma separated list). %s ignored\n",
+ w);
+ else
+ mis.devices = xstrdup(w + 8);
+ } else if (strncasecmp(w, "spare-group=", 12) == 0) {
+ if (mis.spare_group)
+ pr_err("only specify one spare group per array. %s ignored.\n",
+ w);
+ else
+ mis.spare_group = xstrdup(w + 12);
+ } else if (strncasecmp(w, "level=", 6) == 0 ) {
+ /* this is mainly for compatability with --brief output */
+ mis.level = map_name(pers, w + 6);
+ } else if (strncasecmp(w, "disks=", 6) == 0) {
+ /* again, for compat */
+ mis.raid_disks = atoi(w + 6);
+ } else if (strncasecmp(w, "num-devices=", 12) == 0) {
+ /* again, for compat */
+ mis.raid_disks = atoi(w + 12);
+ } else if (strncasecmp(w, "spares=", 7) == 0) {
+ /* for warning if not all spares present */
+ mis.spare_disks = atoi(w + 7);
+ } else if (strncasecmp(w, "metadata=", 9) == 0) {
+ /* style of metadata on the devices. */
+ int i;
+
+ for(i=0; superlist[i] && !mis.st; i++)
+ mis.st = superlist[i]->
+ match_metadata_desc(w + 9);
+
+ if (!mis.st)
+ pr_err("metadata format %s unknown, ignored.\n",
+ w + 9);
+ } else if (strncasecmp(w, "auto=", 5) == 0 ) {
+ /* whether to create device special files as needed */
+ mis.autof = parse_auto(w + 5, "auto type", 0);
+ } else if (strncasecmp(w, "member=", 7) == 0) {
+ /* subarray within a container */
+ mis.member = xstrdup(w + 7);
+ } else if (strncasecmp(w, "container=", 10) == 0) {
+ /* The container holding this subarray.
+ * Either a device name or a uuid */
+ mis.container = xstrdup(w + 10);
+ } else {
+ pr_err("unrecognised word on ARRAY line: %s\n",
+ w);
+ }
+ }
+ if (mis.uuid_set == 0 && mis.devices == NULL &&
+ mis.super_minor == UnSet && mis.name[0] == 0 &&
+ (mis.container == NULL || mis.member == NULL))
+ pr_err("ARRAY line %s has no identity information.\n",
+ mis.devname);
+ else {
+ mi = xmalloc(sizeof(*mi));
+ *mi = mis;
+ mi->devname = mis.devname ? xstrdup(mis.devname) : NULL;
+ mi->next = NULL;
+ *mddevlp = mi;
+ mddevlp = &mi->next;
+ }
+}
+
+static char *alert_email = NULL;
+void mailline(char *line)
+{
+ char *w;
+
+ for (w = dl_next(line); w != line; w = dl_next(w))
+ if (alert_email == NULL)
+ alert_email = xstrdup(w);
+}
+
+static char *alert_mail_from = NULL;
+void mailfromline(char *line)
+{
+ char *w;
+
+ for (w = dl_next(line); w != line; w = dl_next(w)) {
+ if (alert_mail_from == NULL)
+ alert_mail_from = xstrdup(w);
+ else {
+ char *t = NULL;
+
+ if (xasprintf(&t, "%s %s", alert_mail_from, w) > 0) {
+ free(alert_mail_from);
+ alert_mail_from = t;
+ }
+ }
+ }
+}
+
+static char *alert_program = NULL;
+void programline(char *line)
+{
+ char *w;
+
+ for (w = dl_next(line); w != line; w = dl_next(w))
+ if (alert_program == NULL)
+ alert_program = xstrdup(w);
+}
+
+static char *home_host = NULL;
+static int require_homehost = 1;
+void homehostline(char *line)
+{
+ char *w;
+
+ for (w = dl_next(line); w != line; w = dl_next(w)) {
+ if (is_devname_ignore(w) == true)
+ require_homehost = 0;
+ else if (home_host == NULL) {
+ if (strcasecmp(w, "<none>") == 0)
+ home_host = xstrdup("");
+ else
+ home_host = xstrdup(w);
+ }
+ }
+}
+
+static char *home_cluster = NULL;
+void homeclusterline(char *line)
+{
+ char *w;
+
+ for (w = dl_next(line); w != line; w = dl_next(w)) {
+ if (home_cluster == NULL) {
+ if (strcasecmp(w, "<none>") == 0)
+ home_cluster = xstrdup("");
+ else
+ home_cluster = xstrdup(w);
+ }
+ }
+}
+
+static int monitor_delay;
+void monitordelayline(char *line)
+{
+ char *w;
+
+ for (w = dl_next(line); w != line; w = dl_next(w)) {
+ if (monitor_delay == 0)
+ monitor_delay = strtol(w, NULL, 10);
+ }
+}
+
+char auto_yes[] = "yes";
+char auto_no[] = "no";
+char auto_homehost[] = "homehost";
+
+static int auto_seen = 0;
+void autoline(char *line)
+{
+ char *w;
+ char *seen;
+ int super_cnt;
+ char *dflt = auto_yes;
+ int homehost = 0;
+ int i;
+
+ if (auto_seen)
+ return;
+ auto_seen = 1;
+
+ /*
+ * Parse the 'auto' line creating policy statements for the 'auto'
+ * policy.
+ *
+ * The default is 'yes' but the 'auto' line might over-ride that.
+ * Words in the line are processed in order with the first
+ * match winning.
+ * word can be:
+ * +version - that version can be assembled
+ * -version - that version cannot be auto-assembled
+ * yes or +all - any other version can be assembled
+ * no or -all - no other version can be assembled.
+ * homehost - any array associated by 'homehost' to this
+ * host can be assembled.
+ *
+ * Thus:
+ * +ddf -0.90 homehost -all
+ * will auto-assemble any ddf array, no 0.90 array, and
+ * any other array (imsm, 1.x) if and only if it is identified
+ * as belonging to this host.
+ *
+ * We translate that to policy by creating 'auto=yes' when we see
+ * a '+version' line, 'auto=no' if we see '-version' before 'homehost',
+ * or 'auto=homehost' if we see '-version' after 'homehost'.
+ * When we see yes, no, +all or -all we stop and any version that hasn't
+ * been seen gets an appropriate auto= entry.
+ */
+
+ /*
+ * If environment variable MDADM_CONF_AUTO is defined, then
+ * it is prepended to the auto line. This allow a script
+ * to easily disable some metadata types.
+ */
+ w = getenv("MDADM_CONF_AUTO");
+ if (w && *w) {
+ char *l = xstrdup(w);
+ char *head = line;
+ w = strtok(l, " \t");
+ while (w) {
+ char *nw = dl_strdup(w);
+ dl_insert(head, nw);
+ head = nw;
+ w = strtok(NULL, " \t");
+ }
+ free(l);
+ }
+
+ for (super_cnt = 0; superlist[super_cnt]; super_cnt++)
+ ;
+ seen = xcalloc(super_cnt, 1);
+
+ for (w = dl_next(line); w != line; w = dl_next(w)) {
+ char *val;
+
+ if (strcasecmp(w, "yes") == 0) {
+ dflt = auto_yes;
+ break;
+ }
+ if (strcasecmp(w, "no") == 0) {
+ if (homehost)
+ dflt = auto_homehost;
+ else
+ dflt = auto_no;
+ break;
+ }
+ if (strcasecmp(w, "homehost") == 0) {
+ homehost = 1;
+ continue;
+ }
+ if (w[0] == '+')
+ val = auto_yes;
+ else if (w[0] == '-') {
+ if (homehost)
+ val = auto_homehost;
+ else
+ val = auto_no;
+ } else
+ continue;
+
+ if (strcasecmp(w + 1, "all") == 0) {
+ dflt = val;
+ break;
+ }
+ for (i = 0; superlist[i]; i++) {
+ const char *version = superlist[i]->name;
+ if (strcasecmp(w + 1, version) == 0)
+ break;
+ /* 1 matches 1.x, 0 matches 0.90 */
+ if (version[1] == '.' && strlen(w + 1) == 1 &&
+ w[1] == version[0])
+ break;
+ /* 1.anything matches 1.x */
+ if (strcmp(version, "1.x") == 0 &&
+ strncmp(w + 1, "1.", 2) == 0)
+ break;
+ }
+ if (superlist[i] == NULL)
+ /* ignore this word */
+ continue;
+ if (seen[i])
+ /* already know about this metadata */
+ continue;
+ policy_add(rule_policy, pol_auto, val, pol_metadata,
+ superlist[i]->name, NULL);
+ seen[i] = 1;
+ }
+ for (i = 0; i < super_cnt; i++)
+ if (!seen[i])
+ policy_add(rule_policy, pol_auto, dflt, pol_metadata,
+ superlist[i]->name, NULL);
+
+ free(seen);
+}
+
+int loaded = 0;
+
+static char *conffile = NULL;
+void set_conffile(char *file)
+{
+ conffile = file;
+}
+
+void conf_file(FILE *f)
+{
+ char *line;
+ while ((line = conf_line(f))) {
+ switch(match_keyword(line)) {
+ case Devices:
+ devline(line);
+ break;
+ case Array:
+ arrayline(line);
+ break;
+ case Mailaddr:
+ mailline(line);
+ break;
+ case Mailfrom:
+ mailfromline(line);
+ break;
+ case Program:
+ programline(line);
+ break;
+ case CreateDev:
+ createline(line);
+ break;
+ case Homehost:
+ homehostline(line);
+ break;
+ case HomeCluster:
+ homeclusterline(line);
+ break;
+ case AutoMode:
+ autoline(line);
+ break;
+ case Policy:
+ policyline(line, rule_policy);
+ break;
+ case PartPolicy:
+ policyline(line, rule_part);
+ break;
+ case Sysfs:
+ sysfsline(line);
+ break;
+ case MonitorDelay:
+ monitordelayline(line);
+ break;
+ default:
+ pr_err("Unknown keyword %s\n", line);
+ }
+ free_line(line);
+ }
+}
+
+struct fname {
+ struct fname *next;
+ char name[];
+};
+
+void conf_file_or_dir(FILE *f)
+{
+ struct stat st;
+ DIR *dir;
+ struct dirent *dp;
+ struct fname *list = NULL;
+
+ fstat(fileno(f), &st);
+ if (S_ISREG(st.st_mode))
+ conf_file(f);
+ else if (!S_ISDIR(st.st_mode))
+ return;
+#if _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
+ dir = fdopendir(fileno(f));
+ if (!dir)
+ return;
+ while ((dp = readdir(dir)) != NULL) {
+ int l;
+ struct fname *fn, **p;
+ if (dp->d_ino == 0)
+ continue;
+ if (dp->d_name[0] == '.')
+ continue;
+ l = strlen(dp->d_name);
+ if (l < 6 || strcmp(dp->d_name + l - 5, ".conf") != 0)
+ continue;
+ fn = xmalloc(sizeof(*fn) + l + 1);
+ strcpy(fn->name, dp->d_name);
+ for (p = &list;
+ *p && strcmp((*p)->name, fn->name) < 0;
+ p = & (*p)->next)
+ ;
+ fn->next = *p;
+ *p = fn;
+ }
+ while (list) {
+ int fd;
+ FILE *f2;
+ struct fname *fn = list;
+ list = list->next;
+ fd = openat(fileno(f), fn->name, O_RDONLY);
+ free(fn);
+ if (fd < 0)
+ continue;
+ f2 = fdopen(fd, "r");
+ if (!f2) {
+ close(fd);
+ continue;
+ }
+ conf_file(f2);
+ fclose(f2);
+ }
+ closedir(dir);
+#endif
+}
+
+void load_conffile(void)
+{
+ FILE *f;
+ char *confdir = NULL;
+ char *head;
+
+ if (loaded)
+ return;
+ if (conffile == NULL) {
+ conffile = DefaultConfFile;
+ confdir = DefaultConfDir;
+ }
+
+ if (strcmp(conffile, "partitions") == 0) {
+ char *list = dl_strdup("DEV");
+ dl_init(list);
+ dl_add(list, dl_strdup("partitions"));
+ devline(list);
+ free_line(list);
+ } else if (str_is_none(conffile) == false) {
+ f = fopen(conffile, "r");
+ /* Debian chose to relocate mdadm.conf into /etc/mdadm/.
+ * To allow Debian users to compile from clean source and still
+ * have a working mdadm, we read /etc/mdadm/mdadm.conf
+ * if /etc/mdadm.conf doesn't exist
+ */
+ if (f == NULL && conffile == DefaultConfFile) {
+ f = fopen(DefaultAltConfFile, "r");
+ if (f) {
+ conffile = DefaultAltConfFile;
+ confdir = DefaultAltConfDir;
+ }
+ }
+ if (f) {
+ conf_file_or_dir(f);
+ fclose(f);
+ }
+ if (confdir) {
+ f = fopen(confdir, "r");
+ if (f) {
+ conf_file_or_dir(f);
+ fclose(f);
+ }
+ }
+ }
+ /* If there was no AUTO line, process an empty line
+ * now so that the MDADM_CONF_AUTO env var gets processed.
+ */
+ head = dl_strdup("AUTO");
+ dl_init(head);
+ autoline(head);
+ free_line(head);
+
+ loaded = 1;
+}
+
+char *conf_get_mailaddr(void)
+{
+ load_conffile();
+ return alert_email;
+}
+
+char *conf_get_mailfrom(void)
+{
+ load_conffile();
+ return alert_mail_from;
+}
+
+char *conf_get_program(void)
+{
+ load_conffile();
+ return alert_program;
+}
+
+char *conf_get_homehost(int *require_homehostp)
+{
+ load_conffile();
+ if (require_homehostp)
+ *require_homehostp = require_homehost;
+ return home_host;
+}
+
+char *conf_get_homecluster(void)
+{
+ load_conffile();
+ return home_cluster;
+}
+
+int conf_get_monitor_delay(void)
+{
+ load_conffile();
+ return monitor_delay;
+}
+
+struct createinfo *conf_get_create_info(void)
+{
+ load_conffile();
+ return &createinfo;
+}
+
+struct mddev_ident *conf_get_ident(char *dev)
+{
+ struct mddev_ident *rv;
+ load_conffile();
+ rv = mddevlist;
+ while (dev && rv && (rv->devname == NULL ||
+ !devname_matches(dev, rv->devname)))
+ rv = rv->next;
+ return rv;
+}
+
+static void append_dlist(struct mddev_dev **dlp, struct mddev_dev *list)
+{
+ while (*dlp)
+ dlp = &(*dlp)->next;
+ *dlp = list;
+}
+
+struct mddev_dev *conf_get_devs()
+{
+ glob_t globbuf;
+ struct conf_dev *cd;
+ int flags = 0;
+ static struct mddev_dev *dlist = NULL;
+ unsigned int i;
+
+ while (dlist) {
+ struct mddev_dev *t = dlist;
+ dlist = dlist->next;
+ free(t->devname);
+ free(t);
+ }
+
+ load_conffile();
+
+ if (cdevlist == NULL) {
+ /* default to 'partitions' and 'containers' */
+ dlist = load_partitions();
+ append_dlist(&dlist, load_containers());
+ }
+
+ for (cd = cdevlist; cd; cd = cd->next) {
+ if (strcasecmp(cd->name, "partitions") == 0)
+ append_dlist(&dlist, load_partitions());
+ else if (strcasecmp(cd->name, "containers") == 0)
+ append_dlist(&dlist, load_containers());
+ else {
+ glob(cd->name, flags, NULL, &globbuf);
+ flags |= GLOB_APPEND;
+ }
+ }
+ if (flags & GLOB_APPEND) {
+ for (i = 0; i < globbuf.gl_pathc; i++) {
+ struct mddev_dev *t;
+ t = xcalloc(1, sizeof(*t));
+ t->devname = xstrdup(globbuf.gl_pathv[i]);
+ t->next = dlist;
+ dlist = t;
+/* printf("one dev is %s\n", t->devname);*/
+ }
+ globfree(&globbuf);
+ }
+
+ return dlist;
+}
+
+int conf_test_dev(char *devname)
+{
+ struct conf_dev *cd;
+ if (cdevlist == NULL)
+ /* allow anything by default */
+ return 1;
+ for (cd = cdevlist; cd; cd = cd->next) {
+ if (strcasecmp(cd->name, "partitions") == 0)
+ return 1;
+ if (fnmatch(cd->name, devname, FNM_PATHNAME) == 0)
+ return 1;
+ }
+ return 0;
+}
+
+int conf_test_metadata(const char *version, struct dev_policy *pol, int is_homehost)
+{
+ /* If anyone said 'yes', that sticks.
+ * else if homehost applies, use that
+ * else if there is a 'no', say 'no'.
+ * else 'yes'.
+ */
+ struct dev_policy *p;
+ int no = 0, found_homehost = 0;
+ load_conffile();
+
+ pol = pol_find(pol, pol_auto);
+ pol_for_each(p, pol, version) {
+ if (strcmp(p->value, "yes") == 0)
+ return 1;
+ if (strcmp(p->value, "homehost") == 0)
+ found_homehost = 1;
+ if (strcmp(p->value, "no") == 0)
+ no = 1;
+ }
+ if (is_homehost && found_homehost)
+ return 1;
+ if (no)
+ return 0;
+ return 1;
+}
+
+int match_oneof(char *devices, char *devname)
+{
+ /* check if one of the comma separated patterns in devices
+ * matches devname
+ */
+
+ while (devices && *devices) {
+ char patn[1024];
+ char *p = devices;
+ devices = strchr(devices, ',');
+ if (!devices)
+ devices = p + strlen(p);
+ if (devices-p < 1024) {
+ strncpy(patn, p, devices - p);
+ patn[devices-p] = 0;
+ if (fnmatch(patn, devname, FNM_PATHNAME) == 0)
+ return 1;
+ }
+ if (*devices == ',')
+ devices++;
+ }
+ return 0;
+}
+
+int devname_matches(char *name, char *match)
+{
+ /* See if the given array name matches the
+ * given match from config file.
+ *
+ * First strip and /dev/md/ or /dev/, then
+ * see if there might be a numeric match of
+ * mdNN with NN
+ * then just strcmp
+ */
+ if (strncmp(name, DEV_MD_DIR, DEV_MD_DIR_LEN) == 0)
+ name += DEV_MD_DIR_LEN;
+ else if (strncmp(name, "/dev/", 5) == 0)
+ name += 5;
+
+ if (strncmp(match, DEV_MD_DIR, DEV_MD_DIR_LEN) == 0)
+ match += DEV_MD_DIR_LEN;
+ else if (strncmp(match, "/dev/", 5) == 0)
+ match += 5;
+
+ if (strncmp(name, "md", 2) == 0 && isdigit(name[2]))
+ name += 2;
+ if (strncmp(match, "md", 2) == 0 && isdigit(match[2]))
+ match += 2;
+
+ return (strcmp(name, match) == 0);
+}
+
+int conf_name_is_free(char *name)
+{
+ /* Check if this name is already taken by an ARRAY entry in
+ * the config file.
+ * It can be taken either by a match on devname, name, or
+ * even super-minor.
+ */
+ struct mddev_ident *dev;
+
+ load_conffile();
+ for (dev = mddevlist; dev; dev = dev->next) {
+ char nbuf[100];
+ if (dev->devname && devname_matches(name, dev->devname))
+ return 0;
+ if (dev->name[0] && devname_matches(name, dev->name))
+ return 0;
+ sprintf(nbuf, "%d", dev->super_minor);
+ if (dev->super_minor != UnSet && devname_matches(name, nbuf))
+ return 0;
+ }
+ return 1;
+}
+
+struct mddev_ident *conf_match(struct supertype *st,
+ struct mdinfo *info,
+ char *devname,
+ int verbose, int *rvp)
+{
+ struct mddev_ident *array_list, *match;
+ array_list = conf_get_ident(NULL);
+ match = NULL;
+ for (; array_list; array_list = array_list->next) {
+ if (array_list->uuid_set &&
+ same_uuid(array_list->uuid, info->uuid,
+ st->ss->swapuuid) == 0) {
+ if (verbose >= 2 && array_list->devname)
+ pr_err("UUID differs from %s.\n",
+ array_list->devname);
+ continue;
+ }
+
+ if (array_list->devices && devname &&
+ !match_oneof(array_list->devices, devname)) {
+ if (verbose >= 2 && array_list->devname)
+ pr_err("Not a listed device for %s.\n",
+ array_list->devname);
+ continue;
+ }
+ if (array_list->super_minor != UnSet &&
+ array_list->super_minor != info->array.md_minor) {
+ if (verbose >= 2 && array_list->devname)
+ pr_err("Different super-minor to %s.\n",
+ array_list->devname);
+ continue;
+ }
+ if (!array_list->uuid_set && !array_list->name[0] &&
+ !array_list->devices && array_list->super_minor == UnSet) {
+ if (verbose >= 2 && array_list->devname)
+ pr_err("%s doesn't have any identifying information.\n",
+ array_list->devname);
+ continue;
+ }
+ /* FIXME, should I check raid_disks and level too?? */
+
+ if (match) {
+ if (verbose >= 0) {
+ if (match->devname && array_list->devname)
+ pr_err("we match both %s and %s - cannot decide which to use.\n",
+ match->devname,
+ array_list->devname);
+ else
+ pr_err("multiple lines in mdadm.conf match\n");
+ }
+ if (rvp)
+ *rvp = 2;
+ match = NULL;
+ break;
+ }
+ match = array_list;
+ }
+ return match;
+}
+
+int conf_verify_devnames(struct mddev_ident *array_list)
+{
+ struct mddev_ident *a1, *a2;
+
+ for (a1 = array_list; a1; a1 = a1->next) {
+ if (!a1->devname)
+ continue;
+ if (strcmp(a1->devname, "<ignore>") == 0)
+ continue;
+ for (a2 = a1->next; a2; a2 = a2->next) {
+ if (!a2->devname)
+ continue;
+ if (strcmp(a1->devname, a2->devname) != 0)
+ continue;
+
+ if (a1->uuid_set && a2->uuid_set) {
+ char nbuf[64];
+ __fname_from_uuid(a1->uuid, 0, nbuf, ':');
+ pr_err("Devices %s and ",
+ nbuf);
+ __fname_from_uuid(a2->uuid, 0, nbuf, ':');
+ fprintf(stderr,
+ "%s have the same name: %s\n",
+ nbuf, a1->devname);
+ } else
+ pr_err("Device %s given twice in config file\n", a1->devname);
+ return 1;
+ }
+ }
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-21 12:26:00 +0000