/*
- * mdctl - manage Linux "md" devices aka RAID arrays.
+ * mdadm - manage Linux "md" devices aka RAID arrays.
*
- * Copyright (C) 2001 Neil Brown <neilb@cse.unsw.edu.au>
+ * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
*
*
* This program is free software; you can redistribute it and/or modify
* Australia
*/
-#include "mdctl.h"
+#include "mdadm.h"
+#include "dlink.h"
+#include <sys/dir.h>
+#include <glob.h>
+#include <fnmatch.h>
+#include <ctype.h>
/*
* Read the config file
* 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
+ * 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 CONFFILE
+#define CONFFILE "/etc/mdadm.conf"
+#endif
+char DefaultConfFile[] = CONFFILE;
+
+char *keywords[] = { "device", "array", "mailaddr", "program", 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;
+}
+
+/* conf_word gets one word from the conf file.
+ * if "allow_key", then accept words at the start of a line,
+ * otherwise stop when such a word is found.
+ * We assume that the file pointer is at the end of a word, so the
+ * next character is a space, or a newline. If not, it is the start of a line.
+ */
+
+char *conf_word(FILE *file, int allow_key)
+{
+ int wsize = 100;
+ int len = 0;
+ int c;
+ int quote;
+ int wordfound = 0;
+ char *word = malloc(wsize);
+
+ if (!word) abort();
+
+ while (wordfound==0) {
+ /* at the end of a word.. */
+ c = getc(file);
+ if (c == '#')
+ while (c != EOF && c != '\n')
+ c = getc(file);
+ if (c == EOF) break;
+ if (c == '\n') continue;
+
+ if (c != ' ' && c != '\t' && ! allow_key) {
+ ungetc(c, file);
+ break;
+ }
+ /* looks like it is safe to get a word here, if there is one */
+ quote = 0;
+ /* first, skip any spaces */
+ while (c == ' ' || c == '\t')
+ c = getc(file);
+ if (c != EOF && c != '\n' && c != '#') {
+ /* we really have a character of a word, so start saving it */
+ while (c != EOF && c != '\n' && (quote || (c!=' ' && c != '\t'))) {
+ wordfound = 1;
+ if (quote && c == quote) quote = 0;
+ else if (quote == 0 && (c == '\'' || c == '"'))
+ quote = c;
+ else {
+ if (len == wsize-1) {
+ wsize += 100;
+ word = realloc(word, wsize);
+ if (!word) abort();
+ }
+ word[len++] = c;
+ }
+ c = getc(file);
+ }
+ }
+ if (c != EOF) ungetc(c, file);
+ }
+ word[len] = 0;
+/* printf("word is <%s>\n", word); */
+ if (!wordfound) {
+ free(word);
+ word = NULL;
+ }
+ return word;
+}
+
+/*
+ * conf_line reads one logical line from the conffile.
+ * It skips comments and continues until it finds a line that starts
+ * with a non blank/comment. This character is pushed back for the next call
+ * A doubly linked list of words is returned.
+ * the first word will be a keyword. Other words will have had quotes removed.
*/
-char DefaultConfFile[] = "/etc/mdctl.conf";
+char *conf_line(FILE *file)
+{
+ char *w;
+ char *list;
+
+ w = conf_word(file, 1);
+ if (w == NULL) return NULL;
+
+ list = dl_strdup(w);
+ free(w);
+ dl_init(list);
+
+ while ((w = conf_word(file,0))){
+ char *w2 = dl_strdup(w);
+ free(w);
+ dl_add(list, w2);
+ }
+/* printf("got a line\n");*/
+ return list;
+}
+
+void free_line(char *line)
+{
+ char *w;
+ for (w=dl_next(line); w != line; w=dl_next(line)) {
+ dl_del(w);
+ dl_free(w);
+ }
+ dl_free(line);
+}
+
-mddev_uuid_t conf_get_uuids(char *conffile)
+struct conf_dev {
+ struct conf_dev *next;
+ char *name;
+} *cdevlist = NULL;
+
+void load_partitions(void)
+{
+ FILE *f = fopen("/proc/partitions", "r");
+ char buf[1024];
+ if (f == NULL) {
+ fprintf(stderr, Name ": cannot open /proc/partitions\n");
+ return;
+ }
+ while (fgets(buf, 1024, f)) {
+ int major, minor;
+ char *name, *mp;
+ 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);
+ if (name) {
+ struct conf_dev *cd;
+
+ cd = malloc(sizeof(*cd));
+ cd->name = strdup(name);
+ cd->next = cdevlist;
+ cdevlist = cd;
+ }
+ }
+ fclose(f);
+}
+
+
+void devline(char *line)
{
- return NULL;
+ char *w;
+ struct conf_dev *cd;
+
+ for (w=dl_next(line); w != line; w=dl_next(w)) {
+ if (w[0] == '/') {
+ cd = malloc(sizeof(*cd));
+ cd->name = strdup(w);
+ cd->next = cdevlist;
+ cdevlist = cd;
+ } else if (strcasecmp(w, "partitions") == 0) {
+ /* read /proc/partitions, and look major/minor up in /dev */
+ load_partitions();
+ } else {
+ fprintf(stderr, Name ": unreconised word on DEVICE line: %s\n",
+ w);
+ }
+ }
+}
+
+mddev_ident_t mddevlist = NULL;
+mddev_ident_t *mddevlp = &mddevlist;
+
+void arrayline(char *line)
+{
+ char *w;
+
+ struct mddev_ident_s mis;
+ mddev_ident_t mi;
+
+ mis.uuid_set = 0;
+ mis.super_minor = UnSet;
+ mis.level = UnSet;
+ mis.raid_disks = UnSet;
+ mis.spare_disks = UnSet;
+ mis.devices = NULL;
+ mis.devname = NULL;
+ mis.spare_group = NULL;
+ mis.autof = 0;
+
+ for (w=dl_next(line); w!=line; w=dl_next(w)) {
+ if (w[0] == '/') {
+ if (mis.devname)
+ fprintf(stderr, Name ": only give one device per ARRAY line: %s and %s\n",
+ mis.devname, w);
+ else mis.devname = w;
+ } else if (strncasecmp(w, "uuid=", 5)==0 ) {
+ if (mis.uuid_set)
+ fprintf(stderr, Name ": only specify uuid once, %s ignored.\n",
+ w);
+ else {
+ if (parse_uuid(w+5, mis.uuid))
+ mis.uuid_set = 1;
+ else
+ fprintf(stderr, Name ": bad uuid: %s\n", w);
+ }
+ } else if (strncasecmp(w, "super-minor=", 12)==0 ) {
+ if (mis.super_minor >= 0)
+ fprintf(stderr, Name ": only specify super-minor once, %s ignored.\n",
+ w);
+ else {
+ char *endptr;
+ mis.super_minor= strtol(w+12, &endptr, 10);
+ if (w[12]==0 || endptr[0]!=0 || mis.super_minor < 0) {
+ fprintf(stderr, Name ": invalid super-minor number: %s\n",
+ w);
+ mis.super_minor = UnSet;
+ }
+ }
+ } 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",
+ w);
+ else
+ mis.devices = strdup(w+8);
+ } else if (strncasecmp(w, "spare-group=", 12) == 0 ) {
+ if (mis.spare_group)
+ fprintf(stderr, Name ": only specify one spare group per array. %s ignored.\n",
+ w);
+ else
+ mis.spare_group = strdup(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, "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");
+ }
+ } else {
+ fprintf(stderr, Name ": unrecognised word on ARRAY line: %s\n",
+ w);
+ }
+ }
+ 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 < 0)
+ fprintf(stderr, Name ": ARRAY line %s has no identity information.\n", mis.devname);
+ else {
+ mi = malloc(sizeof(*mi));
+ *mi = mis;
+ mi->devname = strdup(mis.devname);
+ 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 = strdup(w);
+ else
+ fprintf(stderr, Name ": excess address on MAIL line: %s - ignored\n",
+ w);
+ }
+}
+
+
+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 = strdup(w);
+ else
+ fprintf(stderr, Name ": excess program on PROGRAM line: %s - ignored\n",
+ w);
+ }
+}
+
+
+int loaded = 0;
+
+void load_conffile(char *conffile)
+{
+ FILE *f;
+ char *line;
+
+ if (loaded) return;
+ if (conffile == NULL)
+ conffile = DefaultConfFile;
+
+ if (strcmp(conffile, "none") == 0) {
+ loaded = 1;
+ return;
+ }
+ if (strcmp(conffile, "partitions")==0) {
+ load_partitions();
+ loaded = 1;
+ return;
+ }
+ f = fopen(conffile, "r");
+ if (f ==NULL)
+ return;
+
+ loaded = 1;
+ while ((line=conf_line(f))) {
+ switch(match_keyword(line)) {
+ case 0: /* DEVICE */
+ devline(line);
+ break;
+ case 1: /* ARRAY */
+ arrayline(line);
+ break;
+ case 2: /* MAIL */
+ mailline(line);
+ break;
+ case 3: /* PROGRAM */
+ programline(line);
+ break;
+ default:
+ fprintf(stderr, Name ": Unknown keyword %s\n", line);
+ }
+ free_line(line);
+ }
+
+ fclose(f);
+
+/* printf("got file\n"); */
+}
+
+char *conf_get_mailaddr(char *conffile)
+{
+ load_conffile(conffile);
+ return alert_email;
+}
+
+char *conf_get_program(char *conffile)
+{
+ load_conffile(conffile);
+ return alert_program;
+}
+
+
+mddev_ident_t conf_get_ident(char *conffile, char *dev)
+{
+ mddev_ident_t rv;
+ load_conffile(conffile);
+ rv = mddevlist;
+ while (dev && rv && strcmp(dev, rv->devname)!=0)
+ rv = rv->next;
+ return rv;
}
mddev_dev_t conf_get_devs(char *conffile)
{
- return NULL;
+ glob_t globbuf;
+ struct conf_dev *cd;
+ int flags = 0;
+ static mddev_dev_t dlist = NULL;
+ unsigned int i;
+
+ while (dlist) {
+ mddev_dev_t t = dlist;
+ dlist = dlist->next;
+ free(t->devname);
+ free(t);
+ }
+
+ load_conffile(conffile);
+
+ for (cd=cdevlist; cd; cd=cd->next) {
+ glob(cd->name, flags, NULL, &globbuf);
+ flags |= GLOB_APPEND;
+ }
+ if (flags & GLOB_APPEND) {
+ for (i=0; i<globbuf.gl_pathc; i++) {
+ mddev_dev_t t = malloc(sizeof(*t));
+ t->devname = strdup(globbuf.gl_pathv[i]);
+ t->next = dlist;
+ dlist = t;
+/* printf("one dev is %s\n", t->devname);*/
+ }
+ globfree(&globbuf);
+ }
+
+ return dlist;
}
+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;
+}
projects / thirdparty / mdadm.git / blobdiff