X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=config.c;h=597e04601ff834cd9fee06c466c5be75b75179a6;hb=22472ee1d25511b4e78af88b87bca3995984f664;hp=7e09b5ca8c58604e0af91591b8b9feb042ad4250;hpb=8844e291492b82f4bae6129673fb383a309514c0;p=thirdparty%2Fmdadm.git diff --git a/config.c b/config.c index 7e09b5ca..597e0460 100644 --- a/config.c +++ b/config.c @@ -1,7 +1,7 @@ /* * mdadm - manage Linux "md" devices aka RAID arrays. * - * Copyright (C) 2001-2006 Neil Brown + * Copyright (C) 2001-2009 Neil Brown * * * This program is free software; you can redistribute it and/or modify @@ -19,12 +19,7 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Author: Neil Brown - * Email: - * Paper: Neil Brown - * School of Computer Science and Engineering - * The University of New South Wales - * Sydney, 2052 - * Australia + * Email: */ #include "mdadm.h" @@ -56,7 +51,7 @@ * 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 + * 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* @@ -79,7 +74,8 @@ char DefaultConfFile[] = CONFFILE; char DefaultAltConfFile[] = CONFFILE2; -enum linetype { Devices, Array, Mailaddr, Mailfrom, Program, CreateDev, Homehost, LTEnd }; +enum linetype { Devices, Array, Mailaddr, Mailfrom, Program, CreateDev, + Homehost, AutoMode, Policy, PartPolicy, LTEnd }; char *keywords[] = { [Devices] = "devices", [Array] = "array", @@ -88,6 +84,9 @@ char *keywords[] = { [Program] = "program", [CreateDev]= "create", [Homehost] = "homehost", + [AutoMode] = "auto", + [Policy] = "policy", + [PartPolicy]="part-policy", [LTEnd] = NULL }; @@ -109,84 +108,6 @@ int match_keyword(char *word) 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); - /* Hack for broken kernels (2.6.14-.24) that put - * "active(auto-read-only)" - * in /proc/mdstat instead of - * "active (auto-read-only)" - */ - if (c == '(' && len >= 6 - && strncmp(word+len-6, "active", 6) == 0) - c = ' '; - } - } - if (c != EOF) ungetc(c, file); - } - word[len] = 0; - - /* Further HACK for broken kernels.. 2.6.14-2.6.24 */ - if (strcmp(word, "auto-read-only)") == 0) - strcpy(word, "(auto-read-only)"); - -/* 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 @@ -232,11 +153,11 @@ struct conf_dev { char *name; } *cdevlist = NULL; -mddev_dev_t load_partitions(void) +struct mddev_dev *load_partitions(void) { FILE *f = fopen("/proc/partitions", "r"); char buf[1024]; - mddev_dev_t rv = NULL; + struct mddev_dev *rv = NULL; if (f == NULL) { fprintf(stderr, Name ": cannot open /proc/partitions\n"); return NULL; @@ -244,7 +165,7 @@ mddev_dev_t load_partitions(void) while (fgets(buf, 1024, f)) { int major, minor; char *name, *mp; - mddev_dev_t d; + struct mddev_dev *d; buf[1023] = '\0'; if (buf[0] != ' ') @@ -261,19 +182,18 @@ mddev_dev_t load_partitions(void) d->devname = strdup(name); d->next = rv; d->used = 0; - d->content = NULL; rv = d; } fclose(f); return rv; } -mddev_dev_t load_containers(void) +struct mddev_dev *load_containers(void) { struct mdstat_ent *mdstat = mdstat_read(1, 0); struct mdstat_ent *ent; - mddev_dev_t d; - mddev_dev_t rv = NULL; + struct mddev_dev *d; + struct mddev_dev *rv = NULL; if (!mdstat) return NULL; @@ -291,7 +211,6 @@ mddev_dev_t load_containers(void) } d->next = rv; d->used = 0; - d->content = NULL; rv = d; } free_mdstat(mdstat); @@ -443,15 +362,26 @@ void devline(char *line) } } -mddev_ident_t mddevlist = NULL; -mddev_ident_t *mddevlp = &mddevlist; +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_s mis; - mddev_ident_t mi; + struct mddev_ident mis; + struct mddev_ident *mi; mis.uuid_set = 0; mis.super_minor = UnSet; @@ -471,11 +401,35 @@ void arrayline(char *line) mis.member = NULL; 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; + if (w[0] == '/' || strchr(w, '=') == NULL) { + /* This names the device, or is ''. + * The rules match those in create_mddev. + * 'w' must be: + * /dev/md/{anything} + * /dev/mdNN + * /dev/md_dNN + * + * or anything that doesn't start '/' or '<' + */ + if (strcasecmp(w, "") == 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) + fprintf(stderr, Name ": only give one " + "device per ARRAY line: %s and %s\n", + mis.devname, w); + else + mis.devname = w; + }else { + fprintf(stderr, Name ": %s is an invalid name for " + "an md device - ignored.\n", w); + } } else if (strncasecmp(w, "uuid=", 5)==0 ) { if (mis.uuid_set) fprintf(stderr, Name ": only specify uuid once, %s ignored.\n", @@ -492,12 +446,13 @@ void arrayline(char *line) w); else { char *endptr; - mis.super_minor= strtol(w+12, &endptr, 10); - if (w[12]==0 || endptr[0]!=0 || mis.super_minor < 0) { + int minor = strtol(w+12, &endptr, 10); + + if (w[12]==0 || endptr[0]!=0 || minor < 0) fprintf(stderr, Name ": invalid super-minor number: %s\n", w); - mis.super_minor = UnSet; - } + else + mis.super_minor = minor; } } else if (strncasecmp(w, "name=", 5)==0) { if (mis.name[0]) @@ -563,7 +518,9 @@ void arrayline(char *line) w); } } - if (mis.uuid_set == 0 && mis.devices == NULL && mis.super_minor == UnSet && mis.name[0] == 0) + if (mis.uuid_set == 0 && mis.devices == NULL && + mis.super_minor == UnSet && mis.name[0] == 0 && + (mis.container == NULL || mis.member == NULL)) fprintf(stderr, Name ": ARRAY line %s has no identity information.\n", mis.devname); else { mi = malloc(sizeof(*mi)); @@ -624,19 +581,135 @@ void programline(char *line) } 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 (home_host == NULL) - home_host = strdup(w); - else + if (strcasecmp(w, "")==0) + require_homehost = 0; + else if (home_host == NULL) { + if (strcasecmp(w, "")==0) + home_host = strdup(""); + else + home_host = strdup(w); + }else fprintf(stderr, Name ": 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) { + fprintf(stderr, Name ": 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 an any version that hasn't + * been seen gets an appropriate auto= entry. + */ + + for (super_cnt = 0; superlist[super_cnt]; super_cnt++) + ; + seen = calloc(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; @@ -707,6 +780,15 @@ void load_conffile(void) 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: fprintf(stderr, Name ": Unknown keyword %s\n", line); } @@ -736,9 +818,11 @@ char *conf_get_program(void) return alert_program; } -char *conf_get_homehost(void) +char *conf_get_homehost(int *require_homehostp) { load_conffile(); + if (require_homehostp) + *require_homehostp = require_homehost; return home_host; } @@ -748,34 +832,34 @@ struct createinfo *conf_get_create_info(void) return &createinfo; } -mddev_ident_t conf_get_ident(char *dev) +struct mddev_ident *conf_get_ident(char *dev) { - mddev_ident_t rv; + struct mddev_ident *rv; load_conffile(); rv = mddevlist; while (dev && rv && (rv->devname == NULL - || strcmp(dev, rv->devname)!=0)) + || !devname_matches(dev, rv->devname))) rv = rv->next; return rv; } -static void append_dlist(mddev_dev_t *dlp, mddev_dev_t list) +static void append_dlist(struct mddev_dev **dlp, struct mddev_dev *list) { while (*dlp) dlp = &(*dlp)->next; *dlp = list; } -mddev_dev_t conf_get_devs() +struct mddev_dev *conf_get_devs() { glob_t globbuf; struct conf_dev *cd; int flags = 0; - static mddev_dev_t dlist = NULL; + static struct mddev_dev *dlist = NULL; unsigned int i; while (dlist) { - mddev_dev_t t = dlist; + struct mddev_dev *t = dlist; dlist = dlist->next; free(t->devname); free(t); @@ -801,11 +885,10 @@ mddev_dev_t conf_get_devs() } if (flags & GLOB_APPEND) { for (i=0; idevname = strdup(globbuf.gl_pathv[i]); t->next = dlist; t->used = 0; - t->content = NULL; dlist = t; /* printf("one dev is %s\n", t->devname);*/ } @@ -830,6 +913,32 @@ int conf_test_dev(char *devname) 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_auto=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, "auto") == 0) + found_auto = 1; + if (strcmp(p->value, "no") == 0) + no = 1; + } + if (is_homehost && found_auto) + return 1; + if (no) + return 0; + return 1; +} int match_oneof(char *devices, char *devname) { @@ -837,7 +946,6 @@ int match_oneof(char *devices, char *devname) * matches devname */ - while (devices && *devices) { char patn[1024]; char *p = devices; @@ -855,3 +963,136 @@ int match_oneof(char *devices, char *devname) } 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 take 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) + fprintf(stderr, Name + ": 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) + fprintf(stderr, Name + ": Name differs from %s.\n", + array_list->devname); + continue; + } + if (array_list->devices && + !match_oneof(array_list->devices, devname)) { + if (verbose >= 2 && array_list->devname) + fprintf(stderr, Name + ": 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) + fprintf(stderr, Name + ": 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) + fprintf(stderr, Name + ": %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) + fprintf(stderr, Name + ": we match both %s and %s - " + "cannot decide which to use.\n", + match->devname, + array_list->devname); + else + fprintf(stderr, Name + ": multiple lines in mdadm.conf" + " match\n"); + } + if (rvp) + *rvp = 2; + match = NULL; + break; + } + match = array_list; + } + return match; +}