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mdadm/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 CONFFILE
#define CONFFILE "/etc/mdadm.conf"
#endif
#ifndef CONFFILE2
/* for Debian compatibility .... */
#define CONFFILE2 "/etc/mdadm/mdadm.conf"
#endif
char DefaultConfFile[] = CONFFILE;
char DefaultAltConfFile[] = CONFFILE2;
enum linetype { Devices, Array, Mailaddr, Mailfrom, Program, CreateDev,
Homehost, AutoMode, Policy, PartPolicy, LTEnd };
char *keywords[] = {
[Devices] = "devices",
[Array] = "array",
[Mailaddr] = "mailaddr",
[Mailfrom] = "mailfrom",
[Program] = "program",
[CreateDev]= "create",
[Homehost] = "homehost",
[AutoMode] = "auto",
[Policy] = "policy",
[PartPolicy]="part-policy",
[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;
}
/*
* 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 *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);
}
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 = xmalloc(sizeof(*d));
memset(d, 0, 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(1, 0);
struct mdstat_ent *ent;
struct mddev_dev *d;
struct mddev_dev *rv = NULL;
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 = xmalloc(sizeof(*d));
memset(d, 0, sizeof(*d));
if (asprintf(&d->devname, "/dev/%s", ent->dev) < 0) {
free(d);
continue;
}
d->next = rv;
rv = d;
}
free_mdstat(mdstat);
return rv;
}
struct createinfo createinfo = {
.autof = 2, /* by default, create devices with standard names */
.symlinks = 1,
.names = 0, /* By default, stick with numbered md devices. */
#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, "symlinks=yes", 12) == 0)
createinfo.symlinks = 1;
else if (strncasecmp(w, "symlinks=no", 11) == 0)
createinfo.symlinks = 0;
else if (strncasecmp(w, "names=yes", 12) == 0)
createinfo.names = 1;
else if (strncasecmp(w, "names=no", 11) == 0)
createinfo.names = 0;
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;
static int is_number(char *w)
{
/* check if there are 1 or more digits and nothing else */
int digits = 0;
while (*w && isdigit(*w)) {
digits++;
w++;
}
return (digits && ! *w);
}
void arrayline(char *line)
{
char *w;
struct mddev_ident mis;
struct mddev_ident *mi;
mis.uuid_set = 0;
mis.super_minor = UnSet;
mis.level = UnSet;
mis.raid_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;
mis.container = NULL;
mis.member = NULL;
for (w=dl_next(line); w!=line; w=dl_next(w)) {
if (w[0] == '/' || strchr(w, '=') == NULL) {
/* This names the device, or is '<ignore>'.
* The rules match those in create_mddev.
* 'w' must be:
* /dev/md/{anything}
* /dev/mdNN
* /dev/md_dNN
* <ignore>
* or anything that doesn't start '/' or '<'
*/
if (strcasecmp(w, "<ignore>") == 0 ||
strncmp(w, "/dev/md/", 8) == 0 ||
(w[0] != '/' && w[0] != '<') ||
(strncmp(w, "/dev/md", 7) == 0 &&
is_number(w+7)) ||
(strncmp(w, "/dev/md_d", 9) == 0 &&
is_number(w+9))
) {
/* This is acceptable */;
if (mis.devname)
pr_err("only give one "
"device per ARRAY line: %s and %s\n",
mis.devname, w);
else
mis.devname = w;
}else {
pr_err("%s is an invalid name for "
"an md device - ignored.\n", w);
}
} 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) {
if (mis.name[0])
pr_err("only specify name once, %s ignored.\n",
w);
else if (strlen(w+5) > 32)
pr_err("name too long, ignoring %s\n", w);
else
strcpy(mis.name, w+5);
} 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);
else
pr_err("excess address on MAIL line: %s - ignored\n",
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);
else
pr_err("excess program on PROGRAM line: %s - ignored\n",
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 (strcasecmp(w, "<ignore>")==0)
require_homehost = 0;
else if (home_host == NULL) {
if (strcasecmp(w, "<none>")==0)
home_host = xstrdup("");
else
home_host = xstrdup(w);
}else
pr_err("excess host name on HOMEHOST line: %s - ignored\n",
w);
}
}
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) {
pr_err("AUTO line may only be give once."
" Subsequent lines ignored\n");
return;
}
/* 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.
*/
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 load_conffile(void)
{
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) {
char *list = dl_strdup("DEV");
dl_init(list);
dl_add(list, dl_strdup("partitions"));
devline(list);
free_line(list);
loaded = 1;
return;
}
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;
}
if (f == NULL)
return;
loaded = 1;
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 AutoMode:
autoline(line);
break;
case Policy:
policyline(line, rule_policy);
break;
case PartPolicy:
policyline(line, rule_part);
break;
default:
pr_err("Unknown keyword %s\n", line);
}
free_line(line);
}
fclose(f);
/* printf("got file\n"); */
}
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;
}
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 = xmalloc(sizeof(*t));
memset(t, 0, 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/", 8) == 0)
name += 8;
else if (strncmp(name, "/dev/", 5) == 0)
name += 5;
if (strncmp(match, "/dev/md/", 8) == 0)
match += 8;
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->name[0] &&
strcasecmp(array_list->name, info->name) != 0) {
if (verbose >= 2 && array_list->devname)
pr_err("Name 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;
}
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