| /* |
| * mdadm - manage Linux "md" devices aka RAID arrays. |
| * |
| * Copyright (C) 2001-2016 Neil Brown <neilb@suse.com> |
| * |
| * |
| * 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 <ctype.h> |
| |
| static int name_matches(char *found, char *required, char *homehost, int require_homehost) |
| { |
| /* See if the name found matches the required name, possibly |
| * prefixed with 'homehost' |
| */ |
| char *sep; |
| unsigned int l; |
| |
| if (strcmp(found, required)==0) |
| return 1; |
| sep = strchr(found, ':'); |
| if (!sep) |
| return 0; |
| l = sep - found; |
| if (strncmp(found, "any:", 4) == 0 || |
| (homehost && strcmp(homehost, "any") == 0) || |
| !require_homehost || |
| (homehost && strlen(homehost) == l && |
| strncmp(found, homehost, l) == 0)) { |
| /* matching homehost */ |
| if (strcmp(sep+1, required) == 0) |
| return 1; |
| } |
| return 0; |
| } |
| |
| static int is_member_busy(char *metadata_version) |
| { |
| /* check if the given member array is active */ |
| struct mdstat_ent *mdstat = mdstat_read(0, 0); |
| struct mdstat_ent *ent; |
| int busy = 0; |
| |
| for (ent = mdstat; ent; ent = ent->next) { |
| if (ent->metadata_version == NULL) |
| continue; |
| if (strncmp(ent->metadata_version, "external:", 9) != 0) |
| continue; |
| if (!is_subarray(&ent->metadata_version[9])) |
| continue; |
| /* Skip first char - it can be '/' or '-' */ |
| if (strcmp(&ent->metadata_version[10], metadata_version+1) == 0) { |
| busy = 1; |
| break; |
| } |
| } |
| free_mdstat(mdstat); |
| |
| return busy; |
| } |
| |
| static int ident_matches(struct mddev_ident *ident, |
| struct mdinfo *content, |
| struct supertype *tst, |
| char *homehost, int require_homehost, |
| char *update, char *devname) |
| { |
| |
| if (ident->uuid_set && (!update || strcmp(update, "uuid")!= 0) && |
| same_uuid(content->uuid, ident->uuid, tst->ss->swapuuid)==0 && |
| memcmp(content->uuid, uuid_zero, sizeof(int[4])) != 0) { |
| if (devname) |
| pr_err("%s has wrong uuid.\n", devname); |
| return 0; |
| } |
| if (ident->name[0] && (!update || strcmp(update, "name")!= 0) && |
| name_matches(content->name, ident->name, homehost, require_homehost)==0) { |
| if (devname) |
| pr_err("%s has wrong name.\n", devname); |
| return 0; |
| } |
| if (ident->super_minor != UnSet && |
| ident->super_minor != content->array.md_minor) { |
| if (devname) |
| pr_err("%s has wrong super-minor.\n", |
| devname); |
| return 0; |
| } |
| if (ident->level != UnSet && |
| ident->level != content->array.level) { |
| if (devname) |
| pr_err("%s has wrong raid level.\n", |
| devname); |
| return 0; |
| } |
| if (ident->raid_disks != UnSet && |
| content->array.raid_disks != 0 && /* metadata doesn't know how many to expect */ |
| ident->raid_disks!= content->array.raid_disks) { |
| if (devname) |
| pr_err("%s requires wrong number of drives.\n", |
| devname); |
| return 0; |
| } |
| if (ident->member && ident->member[0]) { |
| /* content->text_version must match */ |
| char *s = strchr(content->text_version+1, '/'); |
| if (s == NULL) { |
| if (devname) |
| pr_err("%s is not a container and one is required.\n", |
| devname); |
| return 0; |
| } else if (strcmp(ident->member, s+1) != 0) { |
| if (devname) |
| pr_err("skipping wrong member %s is %s\n", |
| content->text_version, devname); |
| return 0; |
| } |
| } |
| return 1; |
| } |
| |
| static int select_devices(struct mddev_dev *devlist, |
| struct mddev_ident *ident, |
| struct supertype **stp, |
| struct mdinfo **contentp, |
| struct context *c, |
| int inargv, int auto_assem) |
| { |
| struct mddev_dev *tmpdev; |
| int num_devs; |
| struct supertype *st = *stp; |
| struct mdinfo *content = NULL; |
| int report_mismatch = ((inargv && c->verbose >= 0) || c->verbose > 0); |
| struct domainlist *domains = NULL; |
| |
| tmpdev = devlist; num_devs = 0; |
| while (tmpdev) { |
| if (tmpdev->used) |
| tmpdev->used = 2; |
| else |
| num_devs++; |
| tmpdev->disposition = 0; |
| tmpdev = tmpdev->next; |
| } |
| |
| /* first walk the list of devices to find a consistent set |
| * that match the criterea, if that is possible. |
| * We flag the ones we like with 'used'. |
| */ |
| for (tmpdev = devlist; |
| tmpdev; |
| tmpdev = tmpdev ? tmpdev->next : NULL) { |
| char *devname = tmpdev->devname; |
| int dfd; |
| struct stat stb; |
| struct supertype *tst; |
| struct dev_policy *pol = NULL; |
| int found_container = 0; |
| |
| if (tmpdev->used > 1) |
| continue; |
| |
| if (ident->container) { |
| if (ident->container[0] == '/' && |
| !same_dev(ident->container, devname)) { |
| if (report_mismatch) |
| pr_err("%s is not the container required (%s)\n", |
| devname, ident->container); |
| continue; |
| } |
| } else if (ident->devices && |
| !match_oneof(ident->devices, devname)) { |
| /* Note that we ignore the "device=" identifier if a |
| * "container=" is given. Checking both is unnecessarily |
| * complicated. |
| */ |
| if (report_mismatch) |
| pr_err("%s is not one of %s\n", devname, ident->devices); |
| continue; |
| } |
| |
| tst = dup_super(st); |
| |
| dfd = dev_open(devname, O_RDONLY); |
| if (dfd < 0) { |
| if (report_mismatch) |
| pr_err("cannot open device %s: %s\n", |
| devname, strerror(errno)); |
| tmpdev->used = 2; |
| } else if (fstat(dfd, &stb)< 0) { |
| /* Impossible! */ |
| pr_err("fstat failed for %s: %s\n", |
| devname, strerror(errno)); |
| tmpdev->used = 2; |
| } else if ((stb.st_mode & S_IFMT) != S_IFBLK) { |
| pr_err("%s is not a block device.\n", |
| devname); |
| tmpdev->used = 2; |
| } else if (must_be_container(dfd)) { |
| if (st) { |
| /* already found some components, this cannot |
| * be another one. |
| */ |
| if (report_mismatch) |
| pr_err("%s is a container, but we are looking for components\n", |
| devname); |
| tmpdev->used = 2; |
| #if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) |
| } if (!tst && (tst = super_by_fd(dfd, NULL)) == NULL) { |
| if (report_mismatch) |
| pr_err("not a recognisable container: %s\n", |
| devname); |
| tmpdev->used = 2; |
| #endif |
| } else if (!tst->ss->load_container |
| || tst->ss->load_container(tst, dfd, NULL)) { |
| if (report_mismatch) |
| pr_err("no correct container type: %s\n", |
| devname); |
| tmpdev->used = 2; |
| } else if (auto_assem && |
| !conf_test_metadata(tst->ss->name, (pol = devid_policy(stb.st_rdev)), |
| tst->ss->match_home(tst, c->homehost) == 1)) { |
| if (report_mismatch) |
| pr_err("%s has metadata type %s for which auto-assembly is disabled\n", |
| devname, tst->ss->name); |
| tmpdev->used = 2; |
| } else |
| found_container = 1; |
| } else { |
| if (!tst && (tst = guess_super(dfd)) == NULL) { |
| if (report_mismatch) |
| pr_err("no recogniseable superblock on %s\n", |
| devname); |
| tmpdev->used = 2; |
| } else if ((tst->ignore_hw_compat = 0), |
| tst->ss->load_super(tst, dfd, |
| report_mismatch ? devname : NULL)) { |
| if (report_mismatch) |
| pr_err("no RAID superblock on %s\n", |
| devname); |
| tmpdev->used = 2; |
| } else if (tst->ss->compare_super == NULL) { |
| if (report_mismatch) |
| pr_err("Cannot assemble %s metadata on %s\n", |
| tst->ss->name, devname); |
| tmpdev->used = 2; |
| } else if (auto_assem && st == NULL && |
| !conf_test_metadata(tst->ss->name, (pol = devid_policy(stb.st_rdev)), |
| tst->ss->match_home(tst, c->homehost) == 1)) { |
| if (report_mismatch) |
| pr_err("%s has metadata type %s for which auto-assembly is disabled\n", |
| devname, tst->ss->name); |
| tmpdev->used = 2; |
| } |
| } |
| if (dfd >= 0) close(dfd); |
| if (tmpdev->used == 2) { |
| if (auto_assem || !inargv) |
| /* Ignore unrecognised devices during auto-assembly */ |
| goto loop; |
| if (ident->uuid_set || ident->name[0] || |
| ident->super_minor != UnSet) |
| /* Ignore unrecognised device if looking for |
| * specific array */ |
| goto loop; |
| |
| pr_err("%s has no superblock - assembly aborted\n", |
| devname); |
| if (st) |
| st->ss->free_super(st); |
| dev_policy_free(pol); |
| domain_free(domains); |
| return -1; |
| } |
| |
| if (found_container) { |
| /* tmpdev is a container. We need to be either |
| * looking for a member, or auto-assembling |
| */ |
| /* should be safe to try an exclusive open now, we |
| * have rejected anything that some other mdadm might |
| * be looking at |
| */ |
| dfd = dev_open(devname, O_RDONLY | O_EXCL); |
| if (dfd < 0) { |
| if (report_mismatch) |
| pr_err("%s is busy - skipping\n", devname); |
| goto loop; |
| } |
| close(dfd); |
| |
| if (ident->container && ident->container[0] != '/') { |
| /* we have a uuid */ |
| int uuid[4]; |
| |
| content = *contentp; |
| tst->ss->getinfo_super(tst, content, NULL); |
| |
| if (!parse_uuid(ident->container, uuid) || |
| !same_uuid(content->uuid, uuid, tst->ss->swapuuid)) { |
| if (report_mismatch) |
| pr_err("%s has wrong UUID to be required container\n", |
| devname); |
| goto loop; |
| } |
| } |
| /* It is worth looking inside this container. |
| */ |
| if (c->verbose > 0) |
| pr_err("looking in container %s\n", |
| devname); |
| |
| for (content = tst->ss->container_content(tst, NULL); |
| content; |
| content = content->next) { |
| |
| if (!ident_matches(ident, content, tst, |
| c->homehost, c->require_homehost, |
| c->update, |
| report_mismatch ? devname : NULL)) |
| /* message already printed */; |
| else if (is_member_busy(content->text_version)) { |
| if (report_mismatch) |
| pr_err("member %s in %s is already assembled\n", |
| content->text_version, |
| devname); |
| } else if (content->array.state & (1<<MD_SB_BLOCK_VOLUME)) { |
| /* do not assemble arrays with unsupported configurations */ |
| pr_err("Cannot activate member %s in %s.\n", |
| content->text_version, |
| devname); |
| } else |
| break; |
| } |
| if (!content) { |
| tmpdev->used = 2; |
| goto loop; /* empty container */ |
| } |
| |
| st = tst; tst = NULL; |
| if (!auto_assem && inargv && tmpdev->next != NULL) { |
| pr_err("%s is a container, but is not only device given: confused and aborting\n", |
| devname); |
| st->ss->free_super(st); |
| dev_policy_free(pol); |
| domain_free(domains); |
| return -1; |
| } |
| if (c->verbose > 0) |
| pr_err("found match on member %s in %s\n", |
| content->text_version, devname); |
| |
| /* make sure we finished the loop */ |
| tmpdev = NULL; |
| goto loop; |
| } else { |
| content = *contentp; |
| tst->ss->getinfo_super(tst, content, NULL); |
| |
| if (!ident_matches(ident, content, tst, |
| c->homehost, c->require_homehost, |
| c->update, |
| report_mismatch ? devname : NULL)) |
| goto loop; |
| |
| if (auto_assem) { |
| /* Never auto-assemble things that conflict |
| * with mdadm.conf in some way |
| */ |
| struct mddev_ident *match; |
| int rv = 0; |
| |
| match = conf_match(tst, content, devname, |
| report_mismatch ? c->verbose : -1, |
| &rv); |
| if (!match && rv == 2) |
| goto loop; |
| if (match && match->devname && |
| strcasecmp(match->devname, "<ignore>") == 0) { |
| if (report_mismatch) |
| pr_err("%s is a member of an explicitly ignored array\n", |
| devname); |
| goto loop; |
| } |
| if (match && !ident_matches(match, content, tst, |
| c->homehost, c->require_homehost, |
| c->update, |
| report_mismatch ? devname : NULL)) |
| /* Array exists in mdadm.conf but some |
| * details don't match, so reject it |
| */ |
| goto loop; |
| } |
| |
| /* should be safe to try an exclusive open now, we |
| * have rejected anything that some other mdadm might |
| * be looking at |
| */ |
| dfd = dev_open(devname, O_RDONLY | O_EXCL); |
| if (dfd < 0) { |
| if (report_mismatch) |
| pr_err("%s is busy - skipping\n", devname); |
| goto loop; |
| } |
| close(dfd); |
| |
| if (st == NULL) |
| st = dup_super(tst); |
| if (st->minor_version == -1) |
| st->minor_version = tst->minor_version; |
| |
| if (memcmp(content->uuid, uuid_zero, |
| sizeof(int[4])) == 0) { |
| /* this is a floating spare. It cannot define |
| * an array unless there are no more arrays of |
| * this type to be found. It can be included |
| * in an array of this type though. |
| */ |
| tmpdev->used = 3; |
| goto loop; |
| } |
| |
| if (st->ss != tst->ss || |
| st->minor_version != tst->minor_version || |
| st->ss->compare_super(st, tst) != 0) { |
| /* Some mismatch. If exactly one array matches this host, |
| * we can resolve on that one. |
| * Or, if we are auto assembling, we just ignore the second |
| * for now. |
| */ |
| if (auto_assem) |
| goto loop; |
| if (c->homehost) { |
| int first = st->ss->match_home(st, c->homehost); |
| int last = tst->ss->match_home(tst, c->homehost); |
| if (first != last && |
| (first == 1 || last == 1)) { |
| /* We can do something */ |
| if (first) {/* just ignore this one */ |
| if (report_mismatch) |
| pr_err("%s misses out due to wrong homehost\n", |
| devname); |
| goto loop; |
| } else { /* reject all those sofar */ |
| struct mddev_dev *td; |
| if (report_mismatch) |
| pr_err("%s overrides previous devices due to good homehost\n", |
| devname); |
| for (td=devlist; td != tmpdev; td=td->next) |
| if (td->used == 1) |
| td->used = 0; |
| tmpdev->used = 1; |
| goto loop; |
| } |
| } |
| } |
| pr_err("superblock on %s doesn't match others - assembly aborted\n", |
| devname); |
| tst->ss->free_super(tst); |
| st->ss->free_super(st); |
| dev_policy_free(pol); |
| domain_free(domains); |
| return -1; |
| } |
| tmpdev->used = 1; |
| } |
| loop: |
| /* Collect domain information from members only */ |
| if (tmpdev && tmpdev->used == 1) { |
| if (!pol) |
| pol = devid_policy(stb.st_rdev); |
| domain_merge(&domains, pol, tst?tst->ss->name:NULL); |
| } |
| dev_policy_free(pol); |
| pol = NULL; |
| if (tst) |
| tst->ss->free_super(tst); |
| } |
| |
| /* Check if we found some imsm spares but no members */ |
| if ((auto_assem || |
| (ident->uuid_set && |
| memcmp(uuid_zero, ident->uuid,sizeof(uuid_zero)) == 0)) && |
| (!st || !st->sb)) |
| for (tmpdev = devlist; tmpdev; tmpdev = tmpdev->next) { |
| if (tmpdev->used != 3) |
| continue; |
| tmpdev->used = 1; |
| content = *contentp; |
| |
| if (!st->sb) { |
| /* we need sb from one of the spares */ |
| int dfd = dev_open(tmpdev->devname, O_RDONLY); |
| if (dfd < 0 || |
| st->ss->load_super(st, dfd, NULL)) |
| tmpdev->used = 2; |
| if (dfd > 0) |
| close(dfd); |
| } |
| } |
| |
| /* Now reject spares that don't match domains of identified members */ |
| for (tmpdev = devlist; tmpdev; tmpdev = tmpdev->next) { |
| struct stat stb; |
| if (tmpdev->used != 3) |
| continue; |
| if (stat(tmpdev->devname, &stb)< 0) { |
| pr_err("fstat failed for %s: %s\n", |
| tmpdev->devname, strerror(errno)); |
| tmpdev->used = 2; |
| } else { |
| struct dev_policy *pol = devid_policy(stb.st_rdev); |
| int dt = domain_test(domains, pol, NULL); |
| if (inargv && dt != 0) |
| /* take this spare as domains match |
| * if there are any */ |
| tmpdev->used = 1; |
| else if (!inargv && dt == 1) |
| /* device wasn't explicitly listed, so need |
| * explicit domain match - which we have */ |
| tmpdev->used = 1; |
| else |
| /* if domains don't match mark as unused */ |
| tmpdev->used = 0; |
| dev_policy_free(pol); |
| } |
| } |
| domain_free(domains); |
| *stp = st; |
| if (st && st->sb && content == *contentp) |
| st->ss->getinfo_super(st, content, NULL); |
| *contentp = content; |
| |
| return num_devs; |
| } |
| |
| struct devs { |
| char *devname; |
| int uptodate; /* set once we decide that this device is as |
| * recent as everything else in the array. |
| */ |
| int included; /* set if the device is already in the array |
| * due to a previous '-I' |
| */ |
| struct mdinfo i; |
| }; |
| |
| static int load_devices(struct devs *devices, char *devmap, |
| struct mddev_ident *ident, struct supertype **stp, |
| struct mddev_dev *devlist, struct context *c, |
| struct mdinfo *content, |
| int mdfd, char *mddev, |
| int *most_recentp, int *bestcntp, int **bestp, |
| int inargv) |
| { |
| struct mddev_dev *tmpdev; |
| int devcnt = 0; |
| int nextspare = 0; |
| #ifndef MDASSEMBLE |
| int bitmap_done = 0; |
| #endif |
| int most_recent = -1; |
| int bestcnt = 0; |
| int *best = *bestp; |
| struct supertype *st = *stp; |
| |
| for (tmpdev = devlist; tmpdev; tmpdev=tmpdev->next) { |
| char *devname = tmpdev->devname; |
| struct stat stb; |
| struct supertype *tst; |
| int i; |
| int dfd; |
| |
| if (tmpdev->used != 1) |
| continue; |
| /* looks like a good enough match to update the super block if needed */ |
| #ifndef MDASSEMBLE |
| if (c->update) { |
| /* prepare useful information in info structures */ |
| struct stat stb2; |
| int err; |
| fstat(mdfd, &stb2); |
| |
| if (strcmp(c->update, "uuid") == 0 && !ident->uuid_set) |
| random_uuid((__u8 *)ident->uuid); |
| |
| dfd = dev_open(devname, |
| tmpdev->disposition == 'I' |
| ? O_RDWR : (O_RDWR|O_EXCL)); |
| |
| tst = dup_super(st); |
| if (dfd < 0 || tst->ss->load_super(tst, dfd, NULL) != 0) { |
| pr_err("cannot re-read metadata from %s - aborting\n", |
| devname); |
| if (dfd >= 0) |
| close(dfd); |
| close(mdfd); |
| free(devices); |
| free(devmap); |
| tst->ss->free_super(tst); |
| free(tst); |
| *stp = st; |
| return -1; |
| } |
| tst->ss->getinfo_super(tst, content, devmap + devcnt * content->array.raid_disks); |
| |
| memcpy(content->uuid, ident->uuid, 16); |
| strcpy(content->name, ident->name); |
| content->array.md_minor = minor(stb2.st_rdev); |
| |
| if (strcmp(c->update, "byteorder") == 0) |
| err = 0; |
| else if (strcmp(c->update, "home-cluster") == 0) { |
| tst->cluster_name = c->homecluster; |
| err = tst->ss->write_bitmap(tst, dfd, NameUpdate); |
| } else if (strcmp(c->update, "nodes") == 0) { |
| tst->nodes = c->nodes; |
| err = tst->ss->write_bitmap(tst, dfd, NodeNumUpdate); |
| } else if (strcmp(c->update, "revert-reshape") == 0 && |
| c->invalid_backup) |
| err = tst->ss->update_super(tst, content, |
| "revert-reshape-nobackup", |
| devname, c->verbose, |
| ident->uuid_set, |
| c->homehost); |
| else |
| err = tst->ss->update_super(tst, content, c->update, |
| devname, c->verbose, |
| ident->uuid_set, |
| c->homehost); |
| if (err < 0) { |
| if (err == -1) |
| pr_err("--update=%s not understood for %s metadata\n", |
| c->update, tst->ss->name); |
| tst->ss->free_super(tst); |
| free(tst); |
| close(mdfd); |
| close(dfd); |
| free(devices); |
| free(devmap); |
| *stp = st; |
| return -1; |
| } |
| if (strcmp(c->update, "uuid")==0 && |
| !ident->uuid_set) { |
| ident->uuid_set = 1; |
| memcpy(ident->uuid, content->uuid, 16); |
| } |
| if (tst->ss->store_super(tst, dfd)) |
| pr_err("Could not re-write superblock on %s.\n", |
| devname); |
| |
| if (strcmp(c->update, "uuid")==0 && |
| ident->bitmap_fd >= 0 && !bitmap_done) { |
| if (bitmap_update_uuid(ident->bitmap_fd, |
| content->uuid, |
| tst->ss->swapuuid) != 0) |
| pr_err("Could not update uuid on external bitmap.\n"); |
| else |
| bitmap_done = 1; |
| } |
| } else |
| #endif |
| { |
| dfd = dev_open(devname, |
| tmpdev->disposition == 'I' |
| ? O_RDWR : (O_RDWR|O_EXCL)); |
| tst = dup_super(st); |
| |
| if (dfd < 0 || tst->ss->load_super(tst, dfd, NULL) != 0) { |
| pr_err("cannot re-read metadata from %s - aborting\n", |
| devname); |
| if (dfd >= 0) |
| close(dfd); |
| close(mdfd); |
| free(devices); |
| free(devmap); |
| tst->ss->free_super(tst); |
| free(tst); |
| *stp = st; |
| return -1; |
| } |
| tst->ss->getinfo_super(tst, content, devmap + devcnt * content->array.raid_disks); |
| } |
| |
| fstat(dfd, &stb); |
| close(dfd); |
| |
| if (c->verbose > 0) |
| pr_err("%s is identified as a member of %s, slot %d%s.\n", |
| devname, mddev, content->disk.raid_disk, |
| (content->disk.state & (1<<MD_DISK_REPLACEMENT)) ? " replacement":""); |
| devices[devcnt].devname = devname; |
| devices[devcnt].uptodate = 0; |
| devices[devcnt].included = (tmpdev->disposition == 'I'); |
| devices[devcnt].i = *content; |
| devices[devcnt].i.disk.major = major(stb.st_rdev); |
| devices[devcnt].i.disk.minor = minor(stb.st_rdev); |
| |
| if (devices[devcnt].i.disk.state == 6) { |
| if (most_recent < 0 || |
| devices[devcnt].i.events |
| > devices[most_recent].i.events) { |
| struct supertype *tmp = tst; |
| tst = st; |
| st = tmp; |
| most_recent = devcnt; |
| } |
| } |
| tst->ss->free_super(tst); |
| free(tst); |
| |
| if (content->array.level == LEVEL_MULTIPATH) |
| /* with multipath, the raid_disk from the superblock is meaningless */ |
| i = devcnt; |
| else |
| i = devices[devcnt].i.disk.raid_disk; |
| if (i+1 == 0 || i == MD_DISK_ROLE_JOURNAL) { |
| if (nextspare < content->array.raid_disks*2) |
| nextspare = content->array.raid_disks*2; |
| i = nextspare++; |
| } else { |
| /* i is raid_disk - double it so there is room for |
| * replacements */ |
| i *= 2; |
| if (devices[devcnt].i.disk.state & (1<<MD_DISK_REPLACEMENT)) |
| i++; |
| if (i >= content->array.raid_disks*2 && |
| i >= nextspare) |
| nextspare = i+1; |
| } |
| if (i < 10000) { |
| if (i >= bestcnt) { |
| int newbestcnt = i+10; |
| int *newbest = xmalloc(sizeof(int)*newbestcnt); |
| int c; |
| for (c=0; c < newbestcnt; c++) |
| if (c < bestcnt) |
| newbest[c] = best[c]; |
| else |
| newbest[c] = -1; |
| if (best)free(best); |
| best = newbest; |
| bestcnt = newbestcnt; |
| } |
| if (best[i] >=0 && |
| devices[best[i]].i.events |
| == devices[devcnt].i.events |
| && (devices[best[i]].i.disk.minor |
| != devices[devcnt].i.disk.minor) |
| && st->ss == &super0 |
| && content->array.level != LEVEL_MULTIPATH) { |
| /* two different devices with identical superblock. |
| * Could be a mis-detection caused by overlapping |
| * partitions. fail-safe. |
| */ |
| pr_err("WARNING %s and %s appear to have very similar superblocks.\n" |
| " If they are really different, please --zero the superblock on one\n" |
| " If they are the same or overlap, please remove one from %s.\n", |
| devices[best[i]].devname, devname, |
| inargv ? "the list" : |
| "the\n DEVICE list in mdadm.conf" |
| ); |
| close(mdfd); |
| free(devices); |
| free(devmap); |
| *stp = st; |
| return -1; |
| } |
| if (best[i] == -1 |
| || (devices[best[i]].i.events |
| < devices[devcnt].i.events)) |
| best[i] = devcnt; |
| } |
| devcnt++; |
| } |
| if (most_recent >= 0) |
| *most_recentp = most_recent; |
| *bestcntp = bestcnt; |
| *bestp = best; |
| *stp = st; |
| return devcnt; |
| } |
| |
| static int force_array(struct mdinfo *content, |
| struct devs *devices, |
| int *best, int bestcnt, char *avail, |
| int most_recent, |
| struct supertype *st, |
| struct context *c) |
| { |
| int okcnt = 0; |
| while (!enough(content->array.level, content->array.raid_disks, |
| content->array.layout, 1, |
| avail) |
| || |
| (content->reshape_active && content->delta_disks > 0 && |
| !enough(content->array.level, (content->array.raid_disks |
| - content->delta_disks), |
| content->new_layout, 1, |
| avail) |
| )) { |
| /* Choose the newest best drive which is |
| * not up-to-date, update the superblock |
| * and add it. |
| */ |
| int fd; |
| struct supertype *tst; |
| unsigned long long current_events; |
| int chosen_drive = -1; |
| int i; |
| |
| for (i = 0; |
| i < content->array.raid_disks * 2 && i < bestcnt; |
| i += 2) { |
| int j = best[i]; |
| if (j < 0) |
| continue; |
| if (devices[j].uptodate) |
| continue; |
| if (devices[j].i.recovery_start != MaxSector) { |
| int delta; |
| if (!devices[j].i.reshape_active || |
| devices[j].i.delta_disks <= 0) |
| continue; |
| /* When increasing number of devices, an |
| * added device also appears to be |
| * recovering. It is safe to include it |
| * as long as it won't be a source of |
| * data. |
| * For now, just allow for last data |
| * devices in RAID4 or last devices in RAID4/5/6. |
| */ |
| delta = devices[j].i.delta_disks; |
| if (devices[j].i.array.level >= 4 && |
| devices[j].i.array.level <= 6 && |
| i/2 >= content->array.raid_disks - delta) |
| /* OK */; |
| else if (devices[j].i.array.level == 4 && |
| i/2 >= content->array.raid_disks - delta - 1) |
| /* OK */; |
| else |
| continue; |
| } |
| if (chosen_drive < 0 || |
| devices[j].i.events |
| > devices[chosen_drive].i.events) |
| chosen_drive = j; |
| } |
| if (chosen_drive < 0) |
| break; |
| current_events = devices[chosen_drive].i.events; |
| add_another: |
| if (c->verbose >= 0) |
| pr_err("forcing event count in %s(%d) from %d upto %d\n", |
| devices[chosen_drive].devname, |
| devices[chosen_drive].i.disk.raid_disk, |
| (int)(devices[chosen_drive].i.events), |
| (int)(devices[most_recent].i.events)); |
| fd = dev_open(devices[chosen_drive].devname, |
| devices[chosen_drive].included ? O_RDWR |
| : (O_RDWR|O_EXCL)); |
| if (fd < 0) { |
| pr_err("Couldn't open %s for write - not updating\n", |
| devices[chosen_drive].devname); |
| devices[chosen_drive].i.events = 0; |
| continue; |
| } |
| tst = dup_super(st); |
| if (tst->ss->load_super(tst,fd, NULL)) { |
| close(fd); |
| pr_err("RAID superblock disappeared from %s - not updating.\n", |
| devices[chosen_drive].devname); |
| devices[chosen_drive].i.events = 0; |
| continue; |
| } |
| content->events = devices[most_recent].i.events; |
| tst->ss->update_super(tst, content, "force-one", |
| devices[chosen_drive].devname, c->verbose, |
| 0, NULL); |
| |
| if (tst->ss->store_super(tst, fd)) { |
| close(fd); |
| pr_err("Could not re-write superblock on %s\n", |
| devices[chosen_drive].devname); |
| devices[chosen_drive].i.events = 0; |
| tst->ss->free_super(tst); |
| continue; |
| } |
| close(fd); |
| devices[chosen_drive].i.events = devices[most_recent].i.events; |
| devices[chosen_drive].uptodate = 1; |
| avail[chosen_drive] = 1; |
| okcnt++; |
| tst->ss->free_super(tst); |
| /* If there are any other drives of the same vintage, |
| * add them in as well. We can't lose and we might gain |
| */ |
| for (i = 0; |
| i < content->array.raid_disks * 2 && i < bestcnt ; |
| i += 2) { |
| int j = best[i]; |
| if (j >= 0 && |
| !devices[j].uptodate && |
| devices[j].i.recovery_start == MaxSector && |
| devices[j].i.events == current_events) { |
| chosen_drive = j; |
| goto add_another; |
| } |
| } |
| } |
| return okcnt; |
| } |
| |
| static int start_array(int mdfd, |
| char *mddev, |
| struct mdinfo *content, |
| struct supertype *st, |
| struct mddev_ident *ident, |
| int *best, int bestcnt, |
| int chosen_drive, |
| struct devs *devices, |
| unsigned int okcnt, |
| unsigned int sparecnt, |
| unsigned int rebuilding_cnt, |
| unsigned int journalcnt, |
| struct context *c, |
| int clean, char *avail, |
| int start_partial_ok, |
| int err_ok, |
| int was_forced |
| ) |
| { |
| int rv; |
| int i; |
| unsigned int req_cnt; |
| |
| if (content->journal_device_required && (content->journal_clean == 0)) { |
| if (!c->force) { |
| pr_err("Not safe to assemble with missing or stale journal device, consider --force.\n"); |
| return 1; |
| } |
| pr_err("Journal is missing or stale, starting array read only.\n"); |
| c->readonly = 1; |
| } |
| |
| rv = set_array_info(mdfd, st, content); |
| if (rv && !err_ok) { |
| pr_err("failed to set array info for %s: %s\n", |
| mddev, strerror(errno)); |
| return 1; |
| } |
| if (ident->bitmap_fd >= 0) { |
| if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) { |
| pr_err("SET_BITMAP_FILE failed.\n"); |
| return 1; |
| } |
| } else if (ident->bitmap_file) { |
| /* From config file */ |
| int bmfd = open(ident->bitmap_file, O_RDWR); |
| if (bmfd < 0) { |
| pr_err("Could not open bitmap file %s\n", |
| ident->bitmap_file); |
| return 1; |
| } |
| if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) { |
| pr_err("Failed to set bitmapfile for %s\n", mddev); |
| close(bmfd); |
| return 1; |
| } |
| close(bmfd); |
| } |
| |
| /* First, add the raid disks, but add the chosen one last */ |
| for (i=0; i<= bestcnt; i++) { |
| int j; |
| if (i < bestcnt) { |
| j = best[i]; |
| if (j == chosen_drive) |
| continue; |
| } else |
| j = chosen_drive; |
| |
| if (j >= 0 && !devices[j].included) { |
| int dfd = dev_open(devices[j].devname, |
| O_RDWR|O_EXCL); |
| if (dfd >= 0) { |
| remove_partitions(dfd); |
| close(dfd); |
| } |
| rv = add_disk(mdfd, st, content, &devices[j].i); |
| |
| if (rv) { |
| pr_err("failed to add %s to %s: %s\n", |
| devices[j].devname, |
| mddev, |
| strerror(errno)); |
| if (i < content->array.raid_disks * 2 |
| || i == bestcnt) |
| okcnt--; |
| else |
| sparecnt--; |
| } else if (c->verbose > 0) |
| pr_err("added %s to %s as %d%s%s\n", |
| devices[j].devname, mddev, |
| devices[j].i.disk.raid_disk, |
| devices[j].uptodate?"": |
| " (possibly out of date)", |
| (devices[j].i.disk.state & (1<<MD_DISK_REPLACEMENT))?" replacement":""); |
| } else if (j >= 0) { |
| if (c->verbose > 0) |
| pr_err("%s is already in %s as %d\n", |
| devices[j].devname, mddev, |
| devices[j].i.disk.raid_disk); |
| } else if (c->verbose > 0 && i < content->array.raid_disks*2 |
| && (i&1) == 0) |
| pr_err("no uptodate device for slot %d of %s\n", |
| i/2, mddev); |
| } |
| |
| if (content->array.level == LEVEL_CONTAINER) { |
| if (c->verbose >= 0) { |
| pr_err("Container %s has been assembled with %d drive%s", |
| mddev, okcnt+sparecnt+journalcnt, |
| okcnt+sparecnt+journalcnt==1?"":"s"); |
| if (okcnt < (unsigned)content->array.raid_disks) |
| fprintf(stderr, " (out of %d)", |
| content->array.raid_disks); |
| fprintf(stderr, "\n"); |
| } |
| |
| if (st->ss->validate_container) { |
| struct mdinfo *devices_list; |
| struct mdinfo *info_devices = xmalloc(sizeof(struct mdinfo)*(okcnt+sparecnt)); |
| unsigned int count; |
| devices_list = NULL; |
| for (count = 0; count < okcnt+sparecnt; count++) { |
| info_devices[count] = devices[count].i; |
| info_devices[count].next = devices_list; |
| devices_list = &info_devices[count]; |
| } |
| if (st->ss->validate_container(devices_list)) |
| pr_err("Mismatch detected!\n"); |
| free(info_devices); |
| } |
| |
| st->ss->free_super(st); |
| sysfs_uevent(content, "change"); |
| if (err_ok && okcnt < (unsigned)content->array.raid_disks) |
| /* Was partial, is still partial, so signal an error |
| * to ensure we don't retry */ |
| return 1; |
| return 0; |
| } |
| |
| /* Get number of in-sync devices according to the superblock. |
| * We must have this number to start the array without -s or -R |
| */ |
| req_cnt = content->array.working_disks; |
| |
| if (c->runstop == 1 || |
| (c->runstop <= 0 && |
| ( enough(content->array.level, content->array.raid_disks, |
| content->array.layout, clean, avail) && |
| (okcnt + rebuilding_cnt >= req_cnt || start_partial_ok) |
| ))) { |
| /* This array is good-to-go. |
| * If a reshape is in progress then we might need to |
| * continue monitoring it. In that case we start |
| * it read-only and let the grow code make it writable. |
| */ |
| int rv; |
| #ifndef MDASSEMBLE |
| if (content->reshape_active && |
| !(content->reshape_active & RESHAPE_NO_BACKUP) && |
| content->delta_disks <= 0) { |
| if (!c->backup_file) { |
| pr_err("%s: Need a backup file to complete reshape of this array.\n", |
| mddev); |
| pr_err("Please provided one with \"--backup-file=...\"\n"); |
| if (c->update && |
| strcmp(c->update, "revert-reshape") == 0) |
| pr_err("(Don't specify --update=revert-reshape again, that part succeeded.)\n"); |
| return 1; |
| } |
| rv = sysfs_set_str(content, NULL, |
| "array_state", "readonly"); |
| if (rv == 0) |
| rv = Grow_continue(mdfd, st, content, |
| c->backup_file, 0, |
| c->freeze_reshape); |
| } else if (c->readonly && |
| sysfs_attribute_available( |
| content, NULL, "array_state")) { |
| rv = sysfs_set_str(content, NULL, |
| "array_state", "readonly"); |
| } else |
| #endif |
| rv = ioctl(mdfd, RUN_ARRAY, NULL); |
| reopen_mddev(mdfd); /* drop O_EXCL */ |
| if (rv == 0) { |
| if (c->verbose >= 0) { |
| pr_err("%s has been started with %d drive%s", |
| mddev, okcnt, okcnt==1?"":"s"); |
| if (okcnt < (unsigned)content->array.raid_disks) |
| fprintf(stderr, " (out of %d)", content->array.raid_disks); |
| if (rebuilding_cnt) |
| fprintf(stderr, "%s %d rebuilding", sparecnt?",":" and", rebuilding_cnt); |
| if (sparecnt) |
| fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s"); |
| if (content->journal_clean) |
| fprintf(stderr, " and %d journal", journalcnt); |
| fprintf(stderr, ".\n"); |
| } |
| if (content->reshape_active && |
| content->array.level >= 4 && |
| content->array.level <= 6) { |
| /* might need to increase the size |
| * of the stripe cache - default is 256 |
| */ |
| int chunk_size = content->array.chunk_size; |
| if (content->reshape_active && |
| content->new_chunk > chunk_size) |
| chunk_size = content->new_chunk; |
| if (256 < 4 * ((chunk_size+4065)/4096)) { |
| struct mdinfo *sra = sysfs_read(mdfd, NULL, 0); |
| if (sra) |
| sysfs_set_num(sra, NULL, |
| "stripe_cache_size", |
| (4 * chunk_size / 4096) + 1); |
| sysfs_free(sra); |
| } |
| } |
| if (okcnt < (unsigned)content->array.raid_disks) { |
| /* If any devices did not get added |
| * because the kernel rejected them based |
| * on event count, try adding them |
| * again providing the action policy is |
| * 're-add' or greater. The bitmap |
| * might allow them to be included, or |
| * they will become spares. |
| */ |
| for (i = 0; i < bestcnt; i++) { |
| int j = best[i]; |
| if (j >= 0 && !devices[j].uptodate) { |
| if (!disk_action_allows(&devices[j].i, st->ss->name, act_re_add)) |
| continue; |
| rv = add_disk(mdfd, st, content, |
| &devices[j].i); |
| if (rv == 0 && c->verbose >= 0) |
| pr_err("%s has been re-added.\n", |
| devices[j].devname); |
| } |
| } |
| } |
| if (content->array.level == 6 && |
| okcnt + 1 == (unsigned)content->array.raid_disks && |
| was_forced) { |
| struct mdinfo *sra = sysfs_read(mdfd, NULL, 0); |
| if (sra) |
| sysfs_set_str(sra, NULL, |
| "sync_action", "repair"); |
| sysfs_free(sra); |
| } |
| return 0; |
| } |
| pr_err("failed to RUN_ARRAY %s: %s\n", |
| mddev, strerror(errno)); |
| |
| if (!enough(content->array.level, content->array.raid_disks, |
| content->array.layout, 1, avail)) |
| pr_err("Not enough devices to start the array.\n"); |
| else if (!enough(content->array.level, |
| content->array.raid_disks, |
| content->array.layout, clean, |
| avail)) |
| pr_err("Not enough devices to start the array while not clean - consider --force.\n"); |
| |
| return 1; |
| } |
| if (c->runstop == -1) { |
| pr_err("%s assembled from %d drive%s", |
| mddev, okcnt, okcnt==1?"":"s"); |
| if (okcnt != (unsigned)content->array.raid_disks) |
| fprintf(stderr, " (out of %d)", content->array.raid_disks); |
| fprintf(stderr, ", but not started.\n"); |
| return 2; |
| } |
| if (c->verbose >= -1) { |
| pr_err("%s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s"); |
| if (rebuilding_cnt) |
| fprintf(stderr, "%s %d rebuilding", sparecnt?",":" and", rebuilding_cnt); |
| if (sparecnt) |
| fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s"); |
| if (!enough(content->array.level, content->array.raid_disks, |
| content->array.layout, 1, avail)) |
| fprintf(stderr, " - not enough to start the array.\n"); |
| else if (!enough(content->array.level, |
| content->array.raid_disks, |
| content->array.layout, clean, |
| avail)) |
| fprintf(stderr, " - not enough to start the array while not clean - consider --force.\n"); |
| else { |
| if (req_cnt == (unsigned)content->array.raid_disks) |
| fprintf(stderr, " - need all %d to start it", req_cnt); |
| else |
| fprintf(stderr, " - need %d to start", req_cnt); |
| fprintf(stderr, " (use --run to insist).\n"); |
| } |
| } |
| return 1; |
| } |
| |
| int Assemble(struct supertype *st, char *mddev, |
| struct mddev_ident *ident, |
| struct mddev_dev *devlist, |
| struct context *c) |
| { |
| /* |
| * The task of Assemble is to find a collection of |
| * devices that should (according to their superblocks) |
| * form an array, and to give this collection to the MD driver. |
| * In Linux-2.4 and later, this involves submitting a |
| * SET_ARRAY_INFO ioctl with no arg - to prepare |
| * the array - and then submit a number of |
| * ADD_NEW_DISK ioctls to add disks into |
| * the array. Finally RUN_ARRAY might |
| * be submitted to start the array. |
| * |
| * Much of the work of Assemble is in finding and/or |
| * checking the disks to make sure they look right. |
| * |
| * If mddev is not set, then scan must be set and we |
| * read through the config file for dev+uuid mapping |
| * We recurse, setting mddev, for each device that |
| * - isn't running |
| * - has a valid uuid (or any uuid if !uuidset) |
| * |
| * If mddev is set, we try to determine state of md. |
| * check version - must be at least 0.90.0 |
| * check kernel version. must be at least 2.4. |
| * If not, we can possibly fall back on START_ARRAY |
| * Try to GET_ARRAY_INFO. |
| * If possible, give up |
| * If not, try to STOP_ARRAY just to make sure |
| * |
| * If !uuidset and scan, look in conf-file for uuid |
| * If not found, give up |
| * If !devlist and scan and uuidset, get list of devs from conf-file |
| * |
| * For each device: |
| * Check superblock - discard if bad |
| * Check uuid (set if we don't have one) - discard if no match |
| * Check superblock similarity if we have a superblock - discard if different |
| * Record events, devicenum |
| * This should give us a list of devices for the array |
| * We should collect the most recent event number |
| * |
| * Count disks with recent enough event count |
| * While force && !enough disks |
| * Choose newest rejected disks, update event count |
| * mark clean and rewrite superblock |
| * If recent kernel: |
| * SET_ARRAY_INFO |
| * foreach device with recent events : ADD_NEW_DISK |
| * if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY |
| * If old kernel: |
| * Check the device numbers in superblock are right |
| * update superblock if any changes |
| * START_ARRAY |
| * |
| */ |
| int rv; |
| int mdfd; |
| int clean; |
| int auto_assem = (mddev == NULL && !ident->uuid_set && |
| ident->super_minor == UnSet && ident->name[0] == 0 |
| && (ident->container == NULL || ident->member == NULL)); |
| struct devs *devices; |
| char *devmap; |
| int *best = NULL; /* indexed by raid_disk */ |
| int bestcnt = 0; |
| int devcnt; |
| unsigned int okcnt, sparecnt, rebuilding_cnt, replcnt, journalcnt; |
| int journal_clean = 0; |
| int i; |
| int was_forced = 0; |
| int most_recent = 0; |
| int chosen_drive; |
| int change = 0; |
| int inargv = 0; |
| int start_partial_ok = (c->runstop >= 0) && |
| (c->force || devlist==NULL || auto_assem); |
| int num_devs; |
| struct mddev_dev *tmpdev; |
| struct mdinfo info; |
| struct mdinfo *content = NULL; |
| struct mdinfo *pre_exist = NULL; |
| char *avail; |
| char *name = NULL; |
| char chosen_name[1024]; |
| struct map_ent *map = NULL; |
| struct map_ent *mp; |
| |
| /* |
| * If any subdevs are listed, then any that don't |
| * match ident are discarded. Remainder must all match and |
| * become the array. |
| * If no subdevs, then we scan all devices in the config file, but |
| * there must be something in the identity |
| */ |
| |
| if (!devlist && |
| ident->uuid_set == 0 && |
| (ident->super_minor < 0 || ident->super_minor == UnSet) && |
| ident->name[0] == 0 && |
| (ident->container == NULL || ident->member == NULL) && |
| ident->devices == NULL) { |
| pr_err("No identity information available for %s - cannot assemble.\n", |
| mddev ? mddev : "further assembly"); |
| return 1; |
| } |
| |
| if (devlist == NULL) |
| devlist = conf_get_devs(); |
| else if (mddev) |
| inargv = 1; |
| |
| try_again: |
| /* We come back here when doing auto-assembly and attempting some |
| * set of devices failed. Those are now marked as ->used==2 and |
| * we ignore them and try again |
| */ |
| if (!st && ident->st) |
| st = ident->st; |
| if (c->verbose>0) |
| pr_err("looking for devices for %s\n", |
| mddev ? mddev : "further assembly"); |
| |
| content = &info; |
| if (st && c->force) |
| st->ignore_hw_compat = 1; |
| num_devs = select_devices(devlist, ident, &st, &content, c, |
| inargv, auto_assem); |
| if (num_devs < 0) |
| return 1; |
| |
| if (!st || !st->sb || !content) |
| return 2; |
| |
| /* We have a full set of devices - we now need to find the |
| * array device. |
| * However there is a risk that we are racing with "mdadm -I" |
| * and the array is already partially assembled - we will have |
| * rejected any devices already in this address. |
| * So we take a lock on the map file - to prevent further races - |
| * and look for the uuid in there. If found and the array is |
| * active, we abort. If found and the array is not active |
| * we commit to that md device and add all the contained devices |
| * to our list. We flag them so that we don't try to re-add, |
| * but can remove if they turn out to not be wanted. |
| */ |
| if (map_lock(&map)) |
| pr_err("failed to get exclusive lock on mapfile - continue anyway...\n"); |
| if (c->update && strcmp(c->update,"uuid") == 0) |
| mp = NULL; |
| else |
| mp = map_by_uuid(&map, content->uuid); |
| if (mp) { |
| struct mdinfo *dv; |
| /* array already exists. */ |
| pre_exist = sysfs_read(-1, mp->devnm, GET_LEVEL|GET_DEVS); |
| if (pre_exist->array.level != UnSet) { |
| pr_err("Found some drive for an array that is already active: %s\n", |
| mp->path); |
| pr_err("giving up.\n"); |
| return 1; |
| } |
| for (dv = pre_exist->devs; dv; dv = dv->next) { |
| /* We want to add this device to our list, |
| * but it could already be there if "mdadm -I" |
| * started *after* we checked for O_EXCL. |
| * If we add it to the top of the list |
| * it will be preferred over later copies. |
| */ |
| struct mddev_dev *newdev; |
| char *devname = map_dev(dv->disk.major, |
| dv->disk.minor, |
| 0); |
| if (!devname) |
| continue; |
| newdev = xmalloc(sizeof(*newdev)); |
| newdev->devname = devname; |
| newdev->disposition = 'I'; |
| newdev->used = 1; |
| newdev->next = devlist; |
| devlist = newdev; |
| num_devs++; |
| } |
| strcpy(chosen_name, mp->path); |
| if (c->verbose > 0 || mddev == NULL || |
| strcmp(mddev, chosen_name) != 0) |
| pr_err("Merging with already-assembled %s\n", |
| chosen_name); |
| mdfd = open_dev_excl(mp->devnm); |
| } else { |
| int trustworthy = FOREIGN; |
| name = content->name; |
| switch (st->ss->match_home(st, c->homehost) |
| ?: st->ss->match_home(st, "any")) { |
| case 1: |
| trustworthy = LOCAL; |
| name = strchr(content->name, ':'); |
| if (name) |
| name++; |
| else |
| name = content->name; |
| break; |
| } |
| if (!auto_assem) |
| /* If the array is listed in mdadm.conf or on |
| * command line, then we trust the name |
| * even if the array doesn't look local |
| */ |
| trustworthy = LOCAL; |
| |
| if (name[0] == 0 && |
| content->array.level == LEVEL_CONTAINER) { |
| name = content->text_version; |
| trustworthy = METADATA; |
| } |
| |
| if (name[0] && trustworthy != LOCAL && |
| ! c->require_homehost && |
| conf_name_is_free(name)) |
| trustworthy = LOCAL; |
| |
| if (trustworthy == LOCAL && |
| strchr(name, ':')) |
| /* Ignore 'host:' prefix of name */ |
| name = strchr(name, ':')+1; |
| |
| mdfd = create_mddev(mddev, name, ident->autof, trustworthy, |
| chosen_name); |
| } |
| if (mdfd < 0) { |
| st->ss->free_super(st); |
| if (auto_assem) |
| goto try_again; |
| return 1; |
| } |
| mddev = chosen_name; |
| if (get_linux_version() < 2004000 || |
| md_get_version(mdfd) < 9000) { |
| pr_err("Assemble requires Linux 2.4 or later, and\n" |
| " md driver version 0.90.0 or later.\n" |
| " Upgrade your kernel or try --build\n"); |
| close(mdfd); |
| return 1; |
| } |
| if (pre_exist == NULL) { |
| if (mddev_busy(fd2devnm(mdfd))) { |
| pr_err("%s already active, cannot restart it!\n", |
| mddev); |
| for (tmpdev = devlist ; |
| tmpdev && tmpdev->used != 1; |
| tmpdev = tmpdev->next) |
| ; |
| if (tmpdev && auto_assem) |
| pr_err("%s needed for %s...\n", |
| mddev, tmpdev->devname); |
| close(mdfd); |
| mdfd = -3; |
| st->ss->free_super(st); |
| if (auto_assem) |
| goto try_again; |
| return 1; |
| } |
| /* just incase it was started but has no content */ |
| ioctl(mdfd, STOP_ARRAY, NULL); |
| } |
| |
| #ifndef MDASSEMBLE |
| if (content != &info) { |
| /* This is a member of a container. Try starting the array. */ |
| int err; |
| err = assemble_container_content(st, mdfd, content, c, |
| chosen_name, NULL); |
| close(mdfd); |
| return err; |
| } |
| #endif |
| /* Ok, no bad inconsistancy, we can try updating etc */ |
| devices = xcalloc(num_devs, sizeof(*devices)); |
| devmap = xcalloc(num_devs, content->array.raid_disks); |
| devcnt = load_devices(devices, devmap, ident, &st, devlist, |
| c, content, mdfd, mddev, |
| &most_recent, &bestcnt, &best, inargv); |
| if (devcnt < 0) |
| return 1; |
| |
| if (devcnt == 0) { |
| pr_err("no devices found for %s\n", |
| mddev); |
| if (st) |
| st->ss->free_super(st); |
| close(mdfd); |
| free(devices); |
| free(devmap); |
| return 1; |
| } |
| |
| if (c->update && strcmp(c->update, "byteorder")==0) |
| st->minor_version = 90; |
| |
| st->ss->getinfo_super(st, content, NULL); |
| clean = content->array.state & 1; |
| |
| /* now we have some devices that might be suitable. |
| * I wonder how many |
| */ |
| avail = xcalloc(content->array.raid_disks, 1); |
| okcnt = 0; |
| replcnt = 0; |
| sparecnt=0; |
| journalcnt=0; |
| rebuilding_cnt=0; |
| for (i=0; i< bestcnt; i++) { |
| int j = best[i]; |
| int event_margin = 1; /* always allow a difference of '1' |
| * like the kernel does |
| */ |
| if (j < 0) continue; |
| /* note: we ignore error flags in multipath arrays |
| * as they don't make sense |
| */ |
| if (content->array.level != LEVEL_MULTIPATH) { |
| if (devices[j].i.disk.state & (1<<MD_DISK_JOURNAL)) { |
| if (content->journal_device_required) |
| journalcnt++; |
| else /* unexpected journal, mark as faulty */ |
| devices[j].i.disk.state |= (1<<MD_DISK_FAULTY); |
| } else if (!(devices[j].i.disk.state & (1<<MD_DISK_ACTIVE))) { |
| if (!(devices[j].i.disk.state |
| & (1<<MD_DISK_FAULTY))) { |
| devices[j].uptodate = 1; |
| sparecnt++; |
| } |
| continue; |
| } |
| } |
| /* If this device thinks that 'most_recent' has failed, then |
| * we must reject this device. |
| */ |
| if (j != most_recent && !c->force && |
| content->array.raid_disks > 0 && |
| devices[most_recent].i.disk.raid_disk >= 0 && |
| devmap[j * content->array.raid_disks + devices[most_recent].i.disk.raid_disk] == 0) { |
| if (c->verbose > -1) |
| pr_err("ignoring %s as it reports %s as failed\n", |
| devices[j].devname, devices[most_recent].devname); |
| best[i] = -1; |
| continue; |
| } |
| /* Require event counter to be same as, or just less than, |
| * most recent. If it is bigger, it must be a stray spare and |
| * should be ignored. |
| */ |
| if (devices[j].i.events+event_margin >= |
| devices[most_recent].i.events && |
| devices[j].i.events <= |
| devices[most_recent].i.events |
| ) { |
| devices[j].uptodate = 1; |
| if (devices[j].i.disk.state & (1<<MD_DISK_JOURNAL)) |
| journal_clean = 1; |
| if (i < content->array.raid_disks * 2) { |
| if (devices[j].i.recovery_start == MaxSector || |
| (content->reshape_active && |
| i >= content->array.raid_disks - content->delta_disks)) { |
| if (!avail[i/2]) { |
| okcnt++; |
| avail[i/2]=1; |
| } else |
| replcnt++; |
| } else |
| rebuilding_cnt++; |
| } else if (devices[j].i.disk.raid_disk != MD_DISK_ROLE_JOURNAL) |
| sparecnt++; |
| } |
| } |
| free(devmap); |
| if (c->force) { |
| int force_ok = force_array(content, devices, best, bestcnt, |
| avail, most_recent, st, c); |
| okcnt += force_ok; |
| if (force_ok) |
| was_forced = 1; |
| } |
| /* Now we want to look at the superblock which the kernel will base things on |
| * and compare the devices that we think are working with the devices that the |
| * superblock thinks are working. |
| * If there are differences and --force is given, then update this chosen |
| * superblock. |
| */ |
| chosen_drive = -1; |
| st->ss->free_super(st); |
| for (i=0; chosen_drive < 0 && i<bestcnt; i+=2) { |
| int j = best[i]; |
| int fd; |
| |
| if (j<0) |
| continue; |
| if (!devices[j].uptodate) |
| continue; |
| if (devices[j].i.events < devices[most_recent].i.events) |
| continue; |
| chosen_drive = j; |
| if ((fd=dev_open(devices[j].devname, |
| devices[j].included ? O_RDONLY |
| : (O_RDONLY|O_EXCL)))< 0) { |
| pr_err("Cannot open %s: %s\n", |
| devices[j].devname, strerror(errno)); |
| close(mdfd); |
| free(devices); |
| return 1; |
| } |
| if (st->ss->load_super(st,fd, NULL)) { |
| close(fd); |
| pr_err("RAID superblock has disappeared from %s\n", |
| devices[j].devname); |
| close(mdfd); |
| free(devices); |
| return 1; |
| } |
| close(fd); |
| } |
| if (st->sb == NULL) { |
| pr_err("No suitable drives found for %s\n", mddev); |
| close(mdfd); |
| free(devices); |
| return 1; |
| } |
| st->ss->getinfo_super(st, content, NULL); |
| #ifndef MDASSEMBLE |
| sysfs_init(content, mdfd, NULL); |
| #endif |
| /* after reload context, store journal_clean in context */ |
| content->journal_clean = journal_clean; |
| for (i=0; i<bestcnt; i++) { |
| int j = best[i]; |
| unsigned int desired_state; |
| |
| if (devices[j].i.disk.raid_disk == MD_DISK_ROLE_JOURNAL) |
| desired_state = (1<<MD_DISK_JOURNAL); |
| else if (i >= content->array.raid_disks * 2) |
| desired_state = 0; |
| else if (i & 1) |
| desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_REPLACEMENT); |
| else |
| desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC); |
| |
| if (j<0) |
| continue; |
| if (!devices[j].uptodate) |
| continue; |
| |
| devices[j].i.disk.state = desired_state; |
| if (!(devices[j].i.array.state & 1)) |
| clean = 0; |
| |
| if (st->ss->update_super(st, &devices[j].i, "assemble", NULL, |
| c->verbose, 0, NULL)) { |
| if (c->force) { |
| if (c->verbose >= 0) |
| pr_err("clearing FAULTY flag for device %d in %s for %s\n", |
| j, mddev, devices[j].devname); |
| change = 1; |
| } else { |
| if (c->verbose >= -1) |
| pr_err("device %d in %s has wrong state in superblock, but %s seems ok\n", |
| i, mddev, devices[j].devname); |
| } |
| } |
| #if 0 |
| if (!(super.disks[i].i.disk.state & (1 << MD_DISK_FAULTY))) { |
| pr_err("devices %d of %s is not marked FAULTY in superblock, but cannot be found\n", |
| i, mddev); |
| } |
| #endif |
| } |
| if (c->force && !clean && |
| !enough(content->array.level, content->array.raid_disks, |
| content->array.layout, clean, |
| avail)) { |
| change += st->ss->update_super(st, content, "force-array", |
| devices[chosen_drive].devname, c->verbose, |
| 0, NULL); |
| was_forced = 1; |
| clean = 1; |
| } |
| |
| if (change) { |
| int fd; |
| fd = dev_open(devices[chosen_drive].devname, |
| devices[chosen_drive].included ? |
| O_RDWR : (O_RDWR|O_EXCL)); |
| if (fd < 0) { |
| pr_err("Could not open %s for write - cannot Assemble array.\n", |
| devices[chosen_drive].devname); |
| close(mdfd); |
| free(devices); |
| return 1; |
| } |
| if (st->ss->store_super(st, fd)) { |
| close(fd); |
| pr_err("Could not re-write superblock on %s\n", |
| devices[chosen_drive].devname); |
| close(mdfd); |
| free(devices); |
| return 1; |
| } |
| if (c->verbose >= 0) |
| pr_err("Marking array %s as 'clean'\n", |
| mddev); |
| close(fd); |
| } |
| |
| /* If we are in the middle of a reshape we may need to restore saved data |
| * that was moved aside due to the reshape overwriting live data |
| * The code of doing this lives in Grow.c |
| */ |
| #ifndef MDASSEMBLE |
| if (content->reshape_active && |
| !(content->reshape_active & RESHAPE_NO_BACKUP)) { |
| int err = 0; |
| int *fdlist = xmalloc(sizeof(int)* bestcnt); |
| if (c->verbose > 0) |
| pr_err("%s has an active reshape - checking if critical section needs to be restored\n", |
| chosen_name); |
| if (!c->backup_file) |
| c->backup_file = locate_backup(content->sys_name); |
| enable_fds(bestcnt/2); |
| for (i = 0; i < bestcnt/2; i++) { |
| int j = best[i*2]; |
| if (j >= 0) { |
| fdlist[i] = dev_open(devices[j].devname, |
| devices[j].included |
| ? O_RDWR : (O_RDWR|O_EXCL)); |
| if (fdlist[i] < 0) { |
| pr_err("Could not open %s for write - cannot Assemble array.\n", |
| devices[j].devname); |
| err = 1; |
| break; |
| } |
| } else |
| fdlist[i] = -1; |
| } |
| if (!err) { |
| if (st->ss->external && st->ss->recover_backup) |
| err = st->ss->recover_backup(st, content); |
| else |
| err = Grow_restart(st, content, fdlist, bestcnt/2, |
| c->backup_file, c->verbose > 0); |
| if (err && c->invalid_backup) { |
| if (c->verbose > 0) |
| pr_err("continuing without restoring backup\n"); |
| err = 0; |
| } |
| } |
| while (i>0) { |
| i--; |
| if (fdlist[i]>=0) close(fdlist[i]); |
| } |
| free(fdlist); |
| if (err) { |
| pr_err("Failed to restore critical section for reshape, sorry.\n"); |
| if (c->backup_file == NULL) |
| cont_err("Possibly you needed to specify the --backup-file\n"); |
| close(mdfd); |
| free(devices); |
| return err; |
| } |
| } |
| #endif |
| |
| /* Almost ready to actually *do* something */ |
| /* First, fill in the map, so that udev can find our name |
| * as soon as we become active. |
| */ |
| if (c->update && strcmp(c->update, "metadata")==0) { |
| content->array.major_version = 1; |
| content->array.minor_version = 0; |
| strcpy(content->text_version, "1.0"); |
| } |
| |
| map_update(&map, fd2devnm(mdfd), content->text_version, |
| content->uuid, chosen_name); |
| |
| rv = start_array(mdfd, mddev, content, |
| st, ident, best, bestcnt, |
| chosen_drive, devices, okcnt, sparecnt, |
| rebuilding_cnt, journalcnt, |
| c, |
| clean, avail, start_partial_ok, |
| pre_exist != NULL, |
| was_forced); |
| if (rv == 1 && !pre_exist) |
| ioctl(mdfd, STOP_ARRAY, NULL); |
| free(devices); |
| map_unlock(&map); |
| if (rv == 0) { |
| wait_for(chosen_name, mdfd); |
| close(mdfd); |
| if (auto_assem) { |
| int usecs = 1; |
| /* There is a nasty race with 'mdadm --monitor'. |
| * If it opens this device before we close it, |
| * it gets an incomplete open on which IO |
| * doesn't work and the capacity is |
| * wrong. |
| * If we reopen (to check for layered devices) |
| * before --monitor closes, we loose. |
| * |
| * So: wait upto 1 second for there to be |
| * a non-zero capacity. |
| */ |
| while (usecs < 1000) { |
| mdfd = open(mddev, O_RDONLY); |
| if (mdfd >= 0) { |
| unsigned long long size; |
| if (get_dev_size(mdfd, NULL, &size) && |
| size > 0) |
| break; |
| close(mdfd); |
| } |
| usleep(usecs); |
| usecs <<= 1; |
| } |
| } |
| } else |
| close(mdfd); |
| |
| /* '2' means 'OK, but not started yet' */ |
| return rv == 2 ? 0 : rv; |
| } |
| |
| #ifndef MDASSEMBLE |
| int assemble_container_content(struct supertype *st, int mdfd, |
| struct mdinfo *content, struct context *c, |
| char *chosen_name, int *result) |
| { |
| struct mdinfo *dev, *sra, *dev2; |
| int working = 0, preexist = 0; |
| int expansion = 0; |
| int old_raid_disks; |
| int start_reshape; |
| char *avail; |
| int err; |
| |
| sysfs_init(content, mdfd, NULL); |
| |
| sra = sysfs_read(mdfd, NULL, GET_VERSION|GET_DEVS); |
| if (sra == NULL || strcmp(sra->text_version, content->text_version) != 0) { |
| if (content->array.major_version == -1 && |
| content->array.minor_version == -2 && |
| c->readonly && |
| content->text_version[0] == '/') |
| content->text_version[0] = '-'; |
| if (sysfs_set_array(content, md_get_version(mdfd)) != 0) { |
| sysfs_free(sra); |
| return 1; |
| } |
| } |
| |
| /* There are two types of reshape: container wide or sub-array specific |
| * Check if metadata requests blocking container wide reshapes |
| */ |
| start_reshape = (content->reshape_active && |
| !((content->reshape_active == CONTAINER_RESHAPE) && |
| (content->array.state & (1<<MD_SB_BLOCK_CONTAINER_RESHAPE)))); |
| |
| /* Block subarray here if it is under reshape now |
| * Do not allow for any changes in this array |
| */ |
| if (st->ss->external && content->recovery_blocked && start_reshape) |
| block_subarray(content); |
| |
| for (dev2 = sra->devs; dev2; dev2 = dev2->next) { |
| for (dev = content->devs; dev; dev = dev->next) |
| if (dev2->disk.major == dev->disk.major && |
| dev2->disk.minor == dev->disk.minor) |
| break; |
| if (dev) |
| continue; |
| /* Don't want this one any more */ |
| if (sysfs_set_str(sra, dev2, "slot", "none") < 0 && |
| errno == EBUSY) { |
| pr_err("Cannot remove old device %s: not updating %s\n", dev2->sys_name, sra->sys_name); |
| sysfs_free(sra); |
| return 1; |
| } |
| sysfs_set_str(sra, dev2, "state", "remove"); |
| } |
| old_raid_disks = content->array.raid_disks - content->delta_disks; |
| avail = xcalloc(content->array.raid_disks, 1); |
| for (dev = content->devs; dev; dev = dev->next) { |
| if (dev->disk.raid_disk >= 0) |
| avail[dev->disk.raid_disk] = 1; |
| if (sysfs_add_disk(content, dev, 1) == 0) { |
| if (dev->disk.raid_disk >= old_raid_disks && |
| content->reshape_active) |
| expansion++; |
| else |
| working++; |
| } else if (errno == EEXIST) |
| preexist++; |
| } |
| sysfs_free(sra); |
| if (working + expansion == 0 && c->runstop <= 0) { |
| free(avail); |
| return 1;/* Nothing new, don't try to start */ |
| } |
| map_update(NULL, fd2devnm(mdfd), content->text_version, |
| content->uuid, chosen_name); |
| |
| if (enough(content->array.level, content->array.raid_disks, |
| content->array.layout, content->array.state & 1, avail) == 0) { |
| if (c->export && result) |
| *result |= INCR_NO; |
| else if (c->verbose >= 0) { |
| pr_err("%s assembled with %d device%s", |
| chosen_name, preexist + working, |
| preexist + working == 1 ? "":"s"); |
| if (preexist) |
| fprintf(stderr, " (%d new)", working); |
| fprintf(stderr, " but not started\n"); |
| } |
| free(avail); |
| return 1; |
| } |
| free(avail); |
| |
| if (c->runstop <= 0 && |
| (working + preexist + expansion) < |
| content->array.working_disks) { |
| if (c->export && result) |
| *result |= INCR_UNSAFE; |
| else if (c->verbose >= 0) { |
| pr_err("%s assembled with %d device%s", |
| chosen_name, preexist + working, |
| preexist + working == 1 ? "":"s"); |
| if (preexist) |
| fprintf(stderr, " (%d new)", working); |
| fprintf(stderr, " but not safe to start\n"); |
| } |
| return 1; |
| } |
| |
| |
| if (start_reshape) { |
| int spare = content->array.raid_disks + expansion; |
| if (restore_backup(st, content, |
| working, |
| spare, &c->backup_file, c->verbose) == 1) |
| return 1; |
| |
| err = sysfs_set_str(content, NULL, |
| "array_state", "readonly"); |
| if (err) |
| return 1; |
| |
| if (st->ss->external) { |
| if (!mdmon_running(st->container_devnm)) |
| start_mdmon(st->container_devnm); |
| ping_monitor(st->container_devnm); |
| if (mdmon_running(st->container_devnm) && |
| st->update_tail == NULL) |
| st->update_tail = &st->updates; |
| } |
| |
| err = Grow_continue(mdfd, st, content, c->backup_file, |
| 0, c->freeze_reshape); |
| } else switch(content->array.level) { |
| case LEVEL_LINEAR: |
| case LEVEL_MULTIPATH: |
| case 0: |
| err = sysfs_set_str(content, NULL, "array_state", |
| c->readonly ? "readonly" : "active"); |
| break; |
| default: |
| err = sysfs_set_str(content, NULL, "array_state", |
| "readonly"); |
| /* start mdmon if needed. */ |
| if (!err) { |
| if (!mdmon_running(st->container_devnm)) |
| start_mdmon(st->container_devnm); |
| ping_monitor(st->container_devnm); |
| } |
| break; |
| } |
| if (!err) |
| sysfs_set_safemode(content, content->safe_mode_delay); |
| |
| /* Block subarray here if it is not reshaped now |
| * It has be blocked a little later to allow mdmon to switch in |
| * in to R/W state |
| */ |
| if (st->ss->external && content->recovery_blocked && |
| !start_reshape) |
| block_subarray(content); |
| |
| if (c->export && result) { |
| if (err) |
| *result |= INCR_NO; |
| else |
| *result |= INCR_YES; |
| } else if (c->verbose >= 0) { |
| if (err) |
| pr_err("array %s now has %d device%s", |
| chosen_name, working + preexist, |
| working + preexist == 1 ? "":"s"); |
| else |
| pr_err("Started %s with %d device%s", |
| chosen_name, working + preexist, |
| working + preexist == 1 ? "":"s"); |
| if (preexist) |
| fprintf(stderr, " (%d new)", working); |
| if (expansion) |
| fprintf(stderr, " ( + %d for expansion)", |
| expansion); |
| fprintf(stderr, "\n"); |
| } |
| if (!err) |
| wait_for(chosen_name, mdfd); |
| return err; |
| /* FIXME should have an O_EXCL and wait for read-auto */ |
| } |
| #endif |