X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=config.c;h=20c46e9eb1fc058cb5290b1502f63d735defdc73;hb=c61c4dd01df75d3a56809db19ec827203505830b;hp=20dc725849682ded3f51e010c5ced357e1428001;hpb=058574b1da29e875104043fe6ea5ff5cfb81ebd0;p=thirdparty%2Fmdadm.git diff --git a/config.c b/config.c index 20dc7258..20c46e9e 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 @@ -19,17 +19,12 @@ * 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" #include "dlink.h" -#include +#include #include #include #include @@ -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* @@ -79,15 +74,17 @@ 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, LTEnd }; char *keywords[] = { [Devices] = "devices", [Array] = "array", [Mailaddr] = "mailaddr", [Mailfrom] = "mailfrom", [Program] = "program", - [CreateDev] = "create", + [CreateDev]= "create", [Homehost] = "homehost", + [AutoMode] = "auto", [LTEnd] = NULL }; @@ -100,7 +97,7 @@ 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) @@ -161,11 +158,24 @@ char *conf_word(FILE *file, int allow_key) 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); @@ -173,7 +183,7 @@ char *conf_word(FILE *file, int allow_key) } return word; } - + /* * conf_line reads one logical line from the conffile. * It skips comments and continues until it finds a line that starts @@ -237,23 +247,58 @@ mddev_dev_t load_partitions(void) if (buf[0] != ' ') continue; major = strtoul(buf, &mp, 10); - if (mp == buf || *mp != ' ') + if (mp == buf || *mp != ' ') continue; minor = strtoul(mp, NULL, 10); name = map_dev(major, minor, 1); - + if (!name) + continue; d = malloc(sizeof(*d)); 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 mdstat_ent *mdstat = mdstat_read(1, 0); + struct mdstat_ent *ent; + mddev_dev_t d; + mddev_dev_t 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 = malloc(sizeof(*d)); + if (!d) + continue; + if (asprintf(&d->devname, "/dev/%s", ent->dev) < 0) { + free(d); + continue; + } + d->next = rv; + d->used = 0; + d->content = NULL; + rv = d; + } + free_mdstat(mdstat); + + return rv; +} + struct createinfo createinfo = { + .autof = 2, /* by default, create devices with standard names */ + .symlinks = 1, #ifdef DEBIAN .gid = 6, /* disk */ .mode = 0660, @@ -289,6 +334,8 @@ int parse_auto(char *str, char *msg, int config) 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) || @@ -363,21 +410,25 @@ static void createline(char *line) if (!createinfo.supertype) fprintf(stderr, Name ": metadata format %s unknown, ignoring\n", w+9); - - } else { + } 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) +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) { + if (w[0] == '/' || strcasecmp(w, "partitions") == 0 || + strcasecmp(w, "containers") == 0) { cd = malloc(sizeof(*cd)); cd->name = strdup(w); cd->next = cdevlist; @@ -392,6 +443,17 @@ void devline(char *line) mddev_ident_t mddevlist = NULL; mddev_ident_t *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; @@ -413,13 +475,39 @@ void arrayline(char *line) 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] == '/') { - 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", @@ -457,7 +545,7 @@ void arrayline(char *line) fprintf(stderr, Name ": only specify bitmap file once. %s ignored\n", w); else - mis.bitmap_file = w+7; + mis.bitmap_file = strdup(w+7); } else if (strncasecmp(w, "devices=", 8 ) == 0 ) { if (mis.devices) @@ -486,7 +574,7 @@ void arrayline(char *line) } 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); @@ -495,19 +583,26 @@ void arrayline(char *line) } 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 = strdup(w+7); + } else if (strncasecmp(w, "container=", 10) == 0) { + /* the container holding this subarray. Either a device name + * or a uuid */ + mis.container = strdup(w+10); } 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 == 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)); *mi = mis; - mi->devname = strdup(mis.devname); + mi->devname = mis.devname ? strdup(mis.devname) : NULL; mi->next = NULL; *mddevlp = mi; mddevlp = &mi->next; @@ -537,10 +632,12 @@ void mailfromline(char *line) 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; + char *t = NULL; + + if (xasprintf(&t, "%s %s", alert_mail_from, w) > 0) { + free(alert_mail_from); + alert_mail_from = t; + } } } } @@ -561,12 +658,15 @@ 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) + if (strcasecmp(w, "")==0) + require_homehost = 0; + else if (home_host == NULL) home_host = strdup(w); else fprintf(stderr, Name ": excess host name on HOMEHOST line: %s - ignored\n", @@ -574,10 +674,35 @@ void homehostline(char *line) } } +static char *auto_options = NULL; +void autoline(char *line) +{ + char *w; + + if (auto_options) { + fprintf(stderr, Name ": AUTO line may only be give once." + " Subsequent lines ignored\n"); + return; + } + + auto_options = dl_strdup(line); + dl_init(auto_options); + + for (w=dl_next(line); w != line ; w=dl_next(w)) { + char *w2 = dl_strdup(w); + dl_add(auto_options, w2); + } +} 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; @@ -638,58 +763,71 @@ void load_conffile(char *conffile) case Homehost: homehostline(line); break; + case AutoMode: + autoline(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) +char *conf_get_mailaddr(void) { - load_conffile(conffile); + load_conffile(); return alert_email; } -char *conf_get_mailfrom(char *conffile) +char *conf_get_mailfrom(void) { - load_conffile(conffile); + load_conffile(); return alert_mail_from; } -char *conf_get_program(char *conffile) +char *conf_get_program(void) { - load_conffile(conffile); + load_conffile(); return alert_program; } -char *conf_get_homehost(char *conffile) +char *conf_get_homehost(int *require_homehostp) { - load_conffile(conffile); + load_conffile(); + if (require_homehostp) + *require_homehostp = require_homehost; return home_host; } -struct createinfo *conf_get_create_info(char *conffile) +struct createinfo *conf_get_create_info(void) { - load_conffile(conffile); + 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) + while (dev && rv && (rv->devname == NULL + || !devname_matches(dev, rv->devname))) rv = rv->next; return rv; } -mddev_dev_t conf_get_devs(char *conffile) +static void append_dlist(mddev_dev_t *dlp, mddev_dev_t list) +{ + while (*dlp) + dlp = &(*dlp)->next; + *dlp = list; +} + +mddev_dev_t conf_get_devs() { glob_t globbuf; struct conf_dev *cd; @@ -703,16 +841,20 @@ mddev_dev_t conf_get_devs(char *conffile) free(t->devname); free(t); } - - load_conffile(conffile); - if (cdevlist == NULL) - /* default to 'partitions */ + 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 && dlist == NULL) - dlist = load_partitions(); + 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; @@ -724,6 +866,7 @@ mddev_dev_t conf_get_devs(char *conffile) t->devname = strdup(globbuf.gl_pathv[i]); t->next = dlist; t->used = 0; + t->content = NULL; dlist = t; /* printf("one dev is %s\n", t->devname);*/ } @@ -733,6 +876,82 @@ mddev_dev_t conf_get_devs(char *conffile) 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, int is_homehost) +{ + /* Check if the given metadata version is allowed + * to be auto-assembled. + * The default is 'yes' but the 'auto' line might over-ride that. + * Words in auto_options 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. + */ + char *w; + load_conffile(); + if (!auto_options) + return 1; + for (w = dl_next(auto_options); w != auto_options; w = dl_next(w)) { + int rv; + if (strcasecmp(w, "yes") == 0) + return 1; + if (strcasecmp(w, "no") == 0) + return 0; + if (strcasecmp(w, "homehost") == 0) { + if (is_homehost) + return 1; + else + continue; + } + if (w[0] == '+') + rv = 1; + else if (w[0] == '-') + rv = 0; + else continue; + + if (strcasecmp(w+1, "all") == 0) + return rv; + if (strcasecmp(w+1, version) == 0) + return rv; + /* allow '0' to match version '0.90' + * and 1 or 1.whatever to match version '1.x' + */ + if (version[1] == '.' && + strlen(w+1) == 1 && + w[1] == version[0]) + return rv; + if (version[1] == '.' && version[2] == 'x' && + strncmp(w+1, version, 2) == 0) + return rv; + } + return 1; +} + int match_oneof(char *devices, char *devname) { /* check if one of the comma separated patterns in devices @@ -757,3 +976,128 @@ 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. + */ + mddev_ident_t 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_s *conf_match(struct mdinfo *info, struct supertype *st) +{ + struct mddev_ident_s *array_list, *match; + int verbose = 0; + char *devname = NULL; + 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 && devname && + !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"); + } + return NULL; + } + match = array_list; + } + return match; +}