Default to --auto=yes
[thirdparty/mdadm.git] / config.c
index 7383e19..7101c3b 100644 (file)
--- a/config.c
+++ b/config.c
@@ -1,7 +1,7 @@
 /*
  * mdadm - manage Linux "md" devices aka RAID arrays.
  *
- * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
+ * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
  *
  *
  *    This program is free software; you can redistribute it and/or modify
@@ -33,6 +33,8 @@
 #include       <glob.h>
 #include       <fnmatch.h>
 #include       <ctype.h>
+#include       <pwd.h>
+#include       <grp.h>
 
 /*
  * Read the config file
 #ifndef CONFFILE
 #define CONFFILE "/etc/mdadm.conf"
 #endif
+#ifndef CONFFILE2
+/* for Debian compatibility .... */
+#define CONFFILE2 "/etc/mdadm/mdadm.conf"
+#endif
 char DefaultConfFile[] = CONFFILE;
-
-char *keywords[] = { "device", "array", "mailaddr", "program", NULL };
+char DefaultAltConfFile[] = CONFFILE2;
+
+enum linetype { Devices, Array, Mailaddr, Mailfrom, Program, CreateDev, Homehost, LTEnd };
+char *keywords[] = {
+       [Devices]  = "devices",
+       [Array]    = "array",
+       [Mailaddr] = "mailaddr",
+       [Mailfrom] = "mailfrom",
+       [Program]  = "program",
+       [CreateDev]   = "create",
+       [Homehost] = "homehost",
+       [LTEnd]    = NULL
+};
 
 /*
  * match_keyword returns an index into the keywords array, or -1 for no match
@@ -214,6 +231,8 @@ mddev_dev_t load_partitions(void)
        while (fgets(buf, 1024, f)) {
                int major, minor;
                char *name, *mp;
+               mddev_dev_t d;
+
                buf[1023] = '\0';
                if (buf[0] != ' ')
                        continue;
@@ -222,20 +241,143 @@ mddev_dev_t load_partitions(void)
                        continue;
                minor = strtoul(mp, NULL, 10);
 
-               name = map_dev(major, minor);
-               if (name) {
-                       mddev_dev_t d;
-
-                       d = malloc(sizeof(*d));
-                       d->devname = strdup(name);
-                       d->next = rv;
-                       rv = d;
-               }
+               name = map_dev(major, minor, 1);
+               if (!name)
+                       continue;
+               d = malloc(sizeof(*d));
+               d->devname = strdup(name);
+               d->next = rv;
+               d->used = 0;
+               rv = d;
        }
        fclose(f);
        return rv;
 }
 
+struct createinfo createinfo = {
+       .autof = 2, /* by default, create devices with standard names */
+       .symlinks = 1,
+#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 {
+                       fprintf(stderr, Name ": %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) {
+                               fprintf(stderr, Name ": 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
+                                       fprintf(stderr, Name ": CREATE user %s not found\n", w+6);
+                       }
+               } else if (strncasecmp(w, "group=", 6) == 0) {
+                       if (w[6] == 0) {
+                               fprintf(stderr, Name ": 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
+                                       fprintf(stderr, Name ": CREATE group %s not found\n", w+6);
+                       }
+               } else if (strncasecmp(w, "mode=", 5) == 0) {
+                       if (w[5] == 0) {
+                               fprintf(stderr, Name ": missing CREATE mode\n");
+                               continue;
+                       }
+                       createinfo.mode = strtoul(w+5, &ep, 8);
+                       if (*ep != 0) {
+                               createinfo.mode = 0600;
+                               fprintf(stderr, Name ": 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)
+                               fprintf(stderr, Name ": metadata format %s unknown, ignoring\n",
+                                       w+9);
+               } else if (strncasecmp(w, "symlinks=yes", 12) == 0)
+                       createinfo.symlinks = 1;
+               else if  (strncasecmp(w, "symlinks=no", 11) == 0)
+                       createinfo.symlinks = 0;
+               else {
+                       fprintf(stderr, Name ": unrecognised word on CREATE line: %s\n",
+                               w);
+               }
+       }
+}
 
 void devline(char *line) 
 {
@@ -269,11 +411,16 @@ void arrayline(char *line)
        mis.super_minor = UnSet;
        mis.level = UnSet;
        mis.raid_disks = UnSet;
-       mis.spare_disks = UnSet;
+       mis.spare_disks = 0;
        mis.devices = NULL;
        mis.devname = NULL;
        mis.spare_group = NULL;
        mis.autof = 0;
+       mis.next = NULL;
+       mis.st = NULL;
+       mis.bitmap_fd = -1;
+       mis.bitmap_file = NULL;
+       mis.name[0] = 0;
 
        for (w=dl_next(line); w!=line; w=dl_next(w)) {
                if (w[0] == '/') {
@@ -292,7 +439,7 @@ void arrayline(char *line)
                                        fprintf(stderr, Name ": bad uuid: %s\n", w);
                        }
                } else if (strncasecmp(w, "super-minor=", 12)==0 ) {
-                       if (mis.super_minor >= 0)
+                       if (mis.super_minor != UnSet)
                                fprintf(stderr, Name ": only specify super-minor once, %s ignored.\n",
                                        w);
                        else {
@@ -304,6 +451,22 @@ void arrayline(char *line)
                                        mis.super_minor = UnSet;
                                }
                        }
+               } else if (strncasecmp(w, "name=", 5)==0) {
+                       if (mis.name[0])
+                               fprintf(stderr, Name ": only specify name once, %s ignored.\n",
+                                       w);
+                       else if (strlen(w+5) > 32)
+                               fprintf(stderr, Name ": name too long, ignoring %s\n", w);
+                       else
+                               strcpy(mis.name, w+5);
+
+               } else if (strncasecmp(w, "bitmap=", 7) == 0) {
+                       if (mis.bitmap_file)
+                               fprintf(stderr, Name ": only specify bitmap file once. %s ignored\n",
+                                       w);
+                       else
+                               mis.bitmap_file = strdup(w+7);
+
                } else if (strncasecmp(w, "devices=", 8 ) == 0 ) {
                        if (mis.devices)
                                fprintf(stderr, Name ": only specify devices once (use a comma separated list). %s ignored\n",
@@ -339,32 +502,7 @@ void arrayline(char *line)
                                fprintf(stderr, Name ": metadata format %s unknown, ignored.\n", w+9);
                } else if (strncasecmp(w, "auto=", 5) == 0 ) {
                        /* whether to create device special files as needed */
-                       if (strcasecmp(w+5, "no")==0)
-                               mis.autof = 0;
-                       else if (strcasecmp(w+5,"yes")==0 || strcasecmp(w+5,"md")==0)
-                               mis.autof = -1;
-                       else {
-                               /* There might be digits, and maybe a hypen, at the end */
-                               char *e = w+5 + strlen(w+5);
-                               int num = 4;
-                               int len;
-                               while (e > w+5 && isdigit(e[-1]))
-                                       e--;
-                               if (*e) {
-                                       num = atoi(e);
-                                       if (num <= 0) num = 1;
-                               }
-                               if (e > w+5 && e[-1] == '-')
-                                       e--;
-                               len = e - (w+5);
-                               if ((len == 3 && strncasecmp(w+5,"mdp",3)==0) ||
-                                   (len == 1 && strncasecmp(w+5,"p",1)==0) ||
-                                   (len >= 4 && strncasecmp(w+5,"part",4)==0))
-                                       mis.autof = num;
-                               else 
-                                       fprintf(stderr, Name ": auto type of \"%s\" ignored for %s\n",
-                                               w+5, mis.devname?mis.devname:"unlabeled-array");
-                       }
+                       mis.autof = parse_auto(w+5, "auto type", 0);
                } else {
                        fprintf(stderr, Name ": unrecognised word on ARRAY line: %s\n",
                                w);
@@ -372,7 +510,7 @@ void arrayline(char *line)
        }
        if (mis.devname == NULL)
                fprintf(stderr, Name ": ARRAY line with no device\n");
-       else if (mis.uuid_set == 0 && mis.devices == NULL && mis.super_minor == UnSet)
+       else if (mis.uuid_set == 0 && mis.devices == NULL && mis.super_minor == UnSet && mis.name[0] == 0)
                fprintf(stderr, Name ": ARRAY line %s has no identity information.\n", mis.devname);
        else {
                mi = malloc(sizeof(*mi));
@@ -398,6 +536,23 @@ void mailline(char *line)
        }
 }
 
+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 = strdup(w);
+               else {
+                       char *t= NULL;
+                       asprintf(&t, "%s %s", alert_mail_from, w);
+                       free(alert_mail_from);
+                       alert_mail_from = t;
+               }
+       }
+}
+
 
 static char *alert_program = NULL;
 void programline(char *line)
@@ -413,10 +568,30 @@ void programline(char *line)
        }
 }
 
+static char *home_host = NULL;
+void homehostline(char *line)
+{
+       char *w;
+
+       for (w=dl_next(line); w != line ; w=dl_next(w)) {
+               if (home_host == NULL)
+                       home_host = strdup(w);
+               else
+                       fprintf(stderr, Name ": excess host name on HOMEHOST line: %s - ignored\n",
+                               w);
+       }
+}
+
 
 int loaded = 0;
 
-void load_conffile(char *conffile)
+static char *conffile = NULL;
+void set_conffile(char *file)
+{
+       conffile = file;
+}
+
+void load_conffile(void)
 {
        FILE *f;
        char *line;
@@ -439,24 +614,44 @@ void load_conffile(char *conffile)
                return;
        }
        f = fopen(conffile, "r");
-       if (f ==NULL)
+       /* 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;
+       }
+       if (f == NULL)
                return;
 
        loaded = 1;
        while ((line=conf_line(f))) {
                switch(match_keyword(line)) {
-               case 0: /* DEVICE */
+               case Devices:
                        devline(line);
                        break;
-               case 1: /* ARRAY */
+               case Array:
                        arrayline(line);
                        break;
-               case 2: /* MAIL */
+               case Mailaddr:
                        mailline(line);
                        break;
-               case 3: /* PROGRAM */
+               case Mailfrom:
+                       mailfromline(line);
+                       break;
+               case Program:
                        programline(line);
                        break;
+               case CreateDev:
+                       createline(line);
+                       break;
+               case Homehost:
+                       homehostline(line);
+                       break;
                default:
                        fprintf(stderr, Name ": Unknown keyword %s\n", line);
                }
@@ -468,30 +663,47 @@ void load_conffile(char *conffile)
 /*    printf("got file\n"); */
 }
 
-char *conf_get_mailaddr(char *conffile)
+char *conf_get_mailaddr(void)
 {
-       load_conffile(conffile);
+       load_conffile();
        return alert_email;
 }
 
-char *conf_get_program(char *conffile)
+char *conf_get_mailfrom(void)
+{
+       load_conffile();
+       return alert_mail_from;
+}
+
+char *conf_get_program(void)
 {
-       load_conffile(conffile);
+       load_conffile();
        return alert_program;
 }
 
+char *conf_get_homehost(void)
+{
+       load_conffile();
+       return home_host;
+}
+
+struct createinfo *conf_get_create_info(void)
+{
+       load_conffile();
+       return &createinfo;
+}
 
-mddev_ident_t conf_get_ident(char *conffile, char *dev)
+mddev_ident_t conf_get_ident(char *dev)
 {
        mddev_ident_t rv;
-       load_conffile(conffile);
+       load_conffile();
        rv = mddevlist;
        while (dev && rv && strcmp(dev, rv->devname)!=0)
                rv = rv->next;
        return rv;
 }
 
-mddev_dev_t conf_get_devs(char *conffile)
+mddev_dev_t conf_get_devs()
 {
        glob_t globbuf;
        struct conf_dev *cd;
@@ -506,8 +718,12 @@ mddev_dev_t conf_get_devs(char *conffile)
                free(t);
        }
     
-       load_conffile(conffile);
-    
+       load_conffile();
+
+       if (cdevlist == NULL)
+               /* default to 'partitions */
+               dlist = load_partitions();
+
        for (cd=cdevlist; cd; cd=cd->next) {
                if (strcasecmp(cd->name, "partitions")==0 && dlist == NULL)
                        dlist = load_partitions();
@@ -521,6 +737,7 @@ mddev_dev_t conf_get_devs(char *conffile)
                        mddev_dev_t t = malloc(sizeof(*t));
                        t->devname = strdup(globbuf.gl_pathv[i]);
                        t->next = dlist;
+                       t->used = 0;
                        dlist = t;
 /*     printf("one dev is %s\n", t->devname);*/
                }