| /* |
| * mdadm - manage Linux "md" devices aka RAID arrays. |
| * |
| * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de> |
| * |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| * Author: Neil Brown |
| * Email: <neilb@cse.unsw.edu.au> |
| * Paper: Neil Brown |
| * School of Computer Science and Engineering |
| * The University of New South Wales |
| * Sydney, 2052 |
| * Australia |
| */ |
| |
| #include "mdadm.h" |
| #include <ctype.h> |
| |
| static int name_matches(char *found, char *required, char *homehost) |
| { |
| /* See if the name found matches the required name, possibly |
| * prefixed with 'homehost' |
| */ |
| char fnd[33]; |
| |
| strncpy(fnd, found, 32); |
| fnd[32] = 0; |
| if (strcmp(found, required)==0) |
| return 1; |
| if (homehost) { |
| int l = strlen(homehost); |
| if (l < 32 && fnd[l] == ':' && |
| strcmp(fnd+l+1, required)==0) |
| return 1; |
| } |
| return 0; |
| } |
| |
| int Assemble(struct supertype *st, char *mddev, int mdfd, |
| mddev_ident_t ident, |
| mddev_dev_t devlist, char *backup_file, |
| int readonly, int runstop, |
| char *update, char *homehost, |
| int verbose, int force) |
| { |
| /* |
| * 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 clean = 0; |
| int must_close = 0; |
| int old_linux = 0; |
| int vers = 0; /* Keep gcc quite - it really is initialised */ |
| struct { |
| char *devname; |
| int uptodate; /* set once we decide that this device is as |
| * recent as everything else in the array. |
| */ |
| struct mdinfo i; |
| } *devices; |
| int *best = NULL; /* indexed by raid_disk */ |
| unsigned int bestcnt = 0; |
| int devcnt = 0; |
| unsigned int okcnt, sparecnt; |
| unsigned int req_cnt; |
| unsigned int i; |
| int most_recent = 0; |
| int chosen_drive; |
| int change = 0; |
| int inargv = 0; |
| int bitmap_done; |
| int start_partial_ok = (runstop >= 0) && (force || devlist==NULL || mdfd < 0); |
| unsigned int num_devs; |
| mddev_dev_t tmpdev; |
| struct mdinfo info; |
| char *avail; |
| int nextspare = 0; |
| |
| if (get_linux_version() < 2004000) |
| old_linux = 1; |
| |
| if (mdfd >= 0) { |
| vers = md_get_version(mdfd); |
| if (vers <= 0) { |
| fprintf(stderr, Name ": %s appears not to be an md device.\n", mddev); |
| return 1; |
| } |
| if (vers < 9000) { |
| fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n" |
| " Upgrade your kernel or try --build\n"); |
| return 1; |
| } |
| |
| if (ioctl(mdfd, GET_ARRAY_INFO, &info.array)>=0) { |
| fprintf(stderr, Name ": device %s already active - cannot assemble it\n", |
| mddev); |
| return 1; |
| } |
| ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */ |
| } |
| /* |
| * 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->devices == NULL) { |
| fprintf(stderr, Name ": No identity information available for %s - cannot assemble.\n", |
| mddev ? mddev : "further assembly"); |
| return 1; |
| } |
| if (devlist == NULL) |
| devlist = conf_get_devs(); |
| else if (mdfd >= 0) |
| inargv = 1; |
| |
| try_again: |
| |
| tmpdev = devlist; num_devs = 0; |
| while (tmpdev) { |
| if (tmpdev->used) |
| tmpdev->used = 2; |
| else |
| num_devs++; |
| tmpdev = tmpdev->next; |
| } |
| devices = malloc(num_devs * sizeof(*devices)); |
| |
| if (!st && ident->st) st = ident->st; |
| |
| if (verbose>0) |
| fprintf(stderr, Name ": looking for devices for %s\n", |
| mddev ? mddev : "further assembly"); |
| |
| /* first walk the list of devices to find a consistent set |
| * that match the criterea, if that is possible. |
| * We flag the one we like with 'used'. |
| */ |
| for (tmpdev = devlist; |
| tmpdev; |
| tmpdev = tmpdev->next) { |
| char *devname = tmpdev->devname; |
| int dfd; |
| struct stat stb; |
| struct supertype *tst = dup_super(st); |
| |
| if (tmpdev->used > 1) continue; |
| |
| if (ident->devices && |
| !match_oneof(ident->devices, devname)) { |
| if ((inargv && verbose>=0) || verbose > 0) |
| fprintf(stderr, Name ": %s is not one of %s\n", devname, ident->devices); |
| continue; |
| } |
| |
| dfd = dev_open(devname, O_RDONLY|O_EXCL); |
| if (dfd < 0) { |
| if ((inargv && verbose >= 0) || verbose > 0) |
| fprintf(stderr, Name ": cannot open device %s: %s\n", |
| devname, strerror(errno)); |
| tmpdev->used = 2; |
| } else if (fstat(dfd, &stb)< 0) { |
| /* Impossible! */ |
| fprintf(stderr, Name ": fstat failed for %s: %s\n", |
| devname, strerror(errno)); |
| tmpdev->used = 2; |
| } else if ((stb.st_mode & S_IFMT) != S_IFBLK) { |
| fprintf(stderr, Name ": %s is not a block device.\n", |
| devname); |
| tmpdev->used = 2; |
| } else if (!tst && (tst = guess_super(dfd)) == NULL) { |
| if ((inargv && verbose >= 0) || verbose > 0) |
| fprintf(stderr, Name ": no recogniseable superblock on %s\n", |
| devname); |
| tmpdev->used = 2; |
| } else if (tst->ss->load_super(tst,dfd, NULL)) { |
| if ((inargv && verbose >= 0) || verbose > 0) |
| fprintf( stderr, Name ": no RAID superblock on %s\n", |
| devname); |
| } else { |
| tst->ss->getinfo_super(tst, &info); |
| } |
| if (dfd >= 0) close(dfd); |
| |
| if (ident->uuid_set && (!update || strcmp(update, "uuid")!= 0) && |
| (!tst || !tst->sb || |
| same_uuid(info.uuid, ident->uuid, tst->ss->swapuuid)==0)) { |
| if ((inargv && verbose >= 0) || verbose > 0) |
| fprintf(stderr, Name ": %s has wrong uuid.\n", |
| devname); |
| goto loop; |
| } |
| if (ident->name[0] && (!update || strcmp(update, "name")!= 0) && |
| (!tst || !tst->sb || |
| name_matches(info.name, ident->name, homehost)==0)) { |
| if ((inargv && verbose >= 0) || verbose > 0) |
| fprintf(stderr, Name ": %s has wrong name.\n", |
| devname); |
| goto loop; |
| } |
| if (ident->super_minor != UnSet && |
| (!tst || !tst->sb || |
| ident->super_minor != info.array.md_minor)) { |
| if ((inargv && verbose >= 0) || verbose > 0) |
| fprintf(stderr, Name ": %s has wrong super-minor.\n", |
| devname); |
| goto loop; |
| } |
| if (ident->level != UnSet && |
| (!tst || !tst->sb || |
| ident->level != info.array.level)) { |
| if ((inargv && verbose >= 0) || verbose > 0) |
| fprintf(stderr, Name ": %s has wrong raid level.\n", |
| devname); |
| goto loop; |
| } |
| if (ident->raid_disks != UnSet && |
| (!tst || !tst->sb || |
| ident->raid_disks!= info.array.raid_disks)) { |
| if ((inargv && verbose >= 0) || verbose > 0) |
| fprintf(stderr, Name ": %s requires wrong number of drives.\n", |
| devname); |
| goto loop; |
| } |
| if (mdfd < 0) { |
| if (tst == NULL || tst->sb == NULL) |
| continue; |
| if (update == NULL && |
| tst->ss->match_home(tst, homehost)==0) { |
| if ((inargv && verbose >= 0) || verbose > 0) |
| fprintf(stderr, Name ": %s is not built for host %s.\n", |
| devname, homehost); |
| /* Auto-assemble, and this is not a usable host */ |
| /* if update != NULL, we are updating the host |
| * name... */ |
| goto loop; |
| } |
| } |
| /* If we are this far, then we are nearly commited to this device. |
| * If the super_block doesn't exist, or doesn't match others, |
| * then we probably cannot continue |
| * However if one of the arrays is for the homehost, and |
| * the other isn't that can disambiguate. |
| */ |
| |
| if (!tst || !tst->sb) { |
| fprintf(stderr, Name ": %s has no superblock - assembly aborted\n", |
| devname); |
| if (st) |
| st->ss->free_super(st); |
| return 1; |
| } |
| |
| if (st == NULL) |
| st = dup_super(tst); |
| if (st->minor_version == -1) |
| st->minor_version = tst->minor_version; |
| 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 (mdfd < 0) |
| goto loop; |
| if (homehost) { |
| int first = st->ss->match_home(st, homehost); |
| int last = tst->ss->match_home(tst, homehost); |
| if (first+last == 1) { |
| /* We can do something */ |
| if (first) {/* just ignore this one */ |
| if ((inargv && verbose >= 0) || verbose > 0) |
| fprintf(stderr, Name ": %s misses out due to wrong homehost\n", |
| devname); |
| goto loop; |
| } else { /* reject all those sofar */ |
| mddev_dev_t td; |
| if ((inargv && verbose >= 0) || verbose > 0) |
| fprintf(stderr, Name ": %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; |
| } |
| } |
| } |
| fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n", |
| devname); |
| tst->ss->free_super(tst); |
| st->ss->free_super(st); |
| return 1; |
| } |
| |
| tmpdev->used = 1; |
| |
| loop: |
| if (tst) |
| tst->ss->free_super(tst); |
| } |
| |
| if (mdfd < 0) { |
| /* So... it is up to me to open the device. |
| * We create a name '/dev/md/XXX' based on the info in the |
| * superblock, and call open_mddev on that |
| */ |
| mdu_array_info_t inf; |
| char *c; |
| if (!st || !st->sb) { |
| return 2; |
| } |
| st->ss->getinfo_super(st, &info); |
| c = strchr(info.name, ':'); |
| if (c) c++; else c= info.name; |
| if (isdigit(*c) && ((ident->autof & 7)==4 || (ident->autof&7)==6)) |
| /* /dev/md/d0 style for partitionable */ |
| xasprintf(&mddev, "/dev/md/d%s", c); |
| else |
| xasprintf(&mddev, "/dev/md/%s", c); |
| mdfd = open_mddev(mddev, ident->autof); |
| if (mdfd < 0) { |
| st->ss->free_super(st); |
| free(devices); |
| goto try_again; |
| } |
| vers = md_get_version(mdfd); |
| if (ioctl(mdfd, GET_ARRAY_INFO, &inf)==0) { |
| for (tmpdev = devlist ; |
| tmpdev && tmpdev->used != 1; |
| tmpdev = tmpdev->next) |
| ; |
| fprintf(stderr, Name ": %s already active, cannot restart it!\n", mddev); |
| if (tmpdev) |
| fprintf(stderr, Name ": %s needed for %s...\n", |
| mddev, tmpdev->devname); |
| close(mdfd); |
| mdfd = -1; |
| st->ss->free_super(st); |
| free(devices); |
| goto try_again; |
| } |
| must_close = 1; |
| } |
| |
| /* Ok, no bad inconsistancy, we can try updating etc */ |
| bitmap_done = 0; |
| for (tmpdev = devlist; tmpdev; tmpdev=tmpdev->next) if (tmpdev->used == 1) { |
| char *devname = tmpdev->devname; |
| struct stat stb; |
| /* looks like a good enough match to update the super block if needed */ |
| #ifndef MDASSEMBLE |
| if (update) { |
| int dfd; |
| /* prepare useful information in info structures */ |
| struct stat stb2; |
| struct supertype *tst; |
| fstat(mdfd, &stb2); |
| |
| if (strcmp(update, "uuid")==0 && |
| !ident->uuid_set) { |
| int rfd; |
| if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || |
| read(rfd, ident->uuid, 16) != 16) { |
| *(__u32*)(ident->uuid) = random(); |
| *(__u32*)(ident->uuid+1) = random(); |
| *(__u32*)(ident->uuid+2) = random(); |
| *(__u32*)(ident->uuid+3) = random(); |
| } |
| if (rfd >= 0) close(rfd); |
| } |
| dfd = dev_open(devname, O_RDWR|O_EXCL); |
| |
| remove_partitions(dfd); |
| |
| tst = dup_super(st); |
| tst->ss->load_super(tst, dfd, NULL); |
| tst->ss->getinfo_super(tst, &info); |
| |
| memcpy(info.uuid, ident->uuid, 16); |
| strcpy(info.name, ident->name); |
| info.array.md_minor = minor(stb2.st_rdev); |
| |
| tst->ss->update_super(tst, &info, update, |
| devname, verbose, |
| ident->uuid_set, homehost); |
| if (strcmp(update, "uuid")==0 && |
| !ident->uuid_set) { |
| ident->uuid_set = 1; |
| memcpy(ident->uuid, info.uuid, 16); |
| } |
| if (dfd < 0) |
| fprintf(stderr, Name ": Cannot open %s for superblock update\n", |
| devname); |
| else if (tst->ss->store_super(tst, dfd)) |
| fprintf(stderr, Name ": Could not re-write superblock on %s.\n", |
| devname); |
| if (dfd >= 0) |
| close(dfd); |
| |
| if (strcmp(update, "uuid")==0 && |
| ident->bitmap_fd >= 0 && !bitmap_done) { |
| if (bitmap_update_uuid(ident->bitmap_fd, |
| info.uuid, |
| tst->ss->swapuuid) != 0) |
| fprintf(stderr, Name ": Could not update uuid on external bitmap.\n"); |
| else |
| bitmap_done = 1; |
| } |
| tst->ss->free_super(tst); |
| } else |
| #endif |
| { |
| struct supertype *tst = dup_super(st); |
| int dfd; |
| dfd = dev_open(devname, O_RDWR|O_EXCL); |
| |
| remove_partitions(dfd); |
| |
| tst->ss->load_super(tst, dfd, NULL); |
| tst->ss->getinfo_super(tst, &info); |
| tst->ss->free_super(tst); |
| close(dfd); |
| } |
| |
| stat(devname, &stb); |
| |
| if (verbose > 0) |
| fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n", |
| devname, mddev, info.disk.raid_disk); |
| devices[devcnt].devname = devname; |
| devices[devcnt].uptodate = 0; |
| devices[devcnt].i = info; |
| devices[devcnt].i.disk.major = major(stb.st_rdev); |
| devices[devcnt].i.disk.minor = minor(stb.st_rdev); |
| if (most_recent < devcnt) { |
| if (devices[devcnt].i.events |
| > devices[most_recent].i.events) |
| most_recent = devcnt; |
| } |
| if (info.array.level == -4) |
| /* with multipath, the raid_disk from the superblock is meaningless */ |
| i = devcnt; |
| else |
| i = devices[devcnt].i.disk.raid_disk; |
| if (i+1 == 0) { |
| if (nextspare < info.array.raid_disks) |
| nextspare = info.array.raid_disks; |
| i = nextspare++; |
| } else { |
| if (i >= info.array.raid_disks && |
| i >= nextspare) |
| nextspare = i+1; |
| } |
| if (i < 10000) { |
| if (i >= bestcnt) { |
| unsigned int newbestcnt = i+10; |
| int *newbest = malloc(sizeof(int)*newbestcnt); |
| unsigned 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->major == 0 |
| && info.array.level != -4) { |
| /* two different devices with identical superblock. |
| * Could be a mis-detection caused by overlapping |
| * partitions. fail-safe. |
| */ |
| fprintf(stderr, Name ": 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" |
| ); |
| if (must_close) close(mdfd); |
| return 1; |
| } |
| if (best[i] == -1 |
| || (devices[best[i]].i.events |
| < devices[devcnt].i.events)) |
| best[i] = devcnt; |
| } |
| devcnt++; |
| } |
| |
| if (devcnt == 0) { |
| fprintf(stderr, Name ": no devices found for %s\n", |
| mddev); |
| if (st) |
| st->ss->free_super(st); |
| if (must_close) close(mdfd); |
| return 1; |
| } |
| |
| if (update && strcmp(update, "byteorder")==0) |
| st->minor_version = 90; |
| |
| st->ss->getinfo_super(st, &info); |
| clean = info.array.state & 1; |
| |
| /* now we have some devices that might be suitable. |
| * I wonder how many |
| */ |
| avail = malloc(info.array.raid_disks); |
| memset(avail, 0, info.array.raid_disks); |
| okcnt = 0; |
| sparecnt=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 (info.array.level != -4) |
| if (!(devices[j].i.disk.state & (1<<MD_DISK_SYNC))) { |
| if (!(devices[j].i.disk.state |
| & (1<<MD_DISK_FAULTY))) |
| sparecnt++; |
| continue; |
| } |
| if (devices[j].i.events+event_margin >= |
| devices[most_recent].i.events) { |
| devices[j].uptodate = 1; |
| if (i < info.array.raid_disks) { |
| okcnt++; |
| avail[i]=1; |
| } else |
| sparecnt++; |
| } |
| } |
| while (force && !enough(info.array.level, info.array.raid_disks, |
| info.array.layout, 1, |
| avail, okcnt)) { |
| /* Choose the newest best drive which is |
| * not up-to-date, update the superblock |
| * and add it. |
| */ |
| int fd; |
| struct supertype *tst; |
| long long current_events; |
| chosen_drive = -1; |
| for (i=0; i<info.array.raid_disks && i < bestcnt; i++) { |
| int j = best[i]; |
| if (j>=0 && |
| !devices[j].uptodate && |
| (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 (verbose >= 0) |
| fprintf(stderr, Name ": 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, O_RDWR|O_EXCL); |
| if (fd < 0) { |
| fprintf(stderr, Name ": 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); |
| fprintf(stderr, Name ": RAID superblock disappeared from %s - not updating.\n", |
| devices[chosen_drive].devname); |
| devices[chosen_drive].i.events = 0; |
| continue; |
| } |
| info.events = devices[most_recent].i.events; |
| tst->ss->update_super(tst, &info, "force-one", |
| devices[chosen_drive].devname, verbose, |
| 0, NULL); |
| |
| if (tst->ss->store_super(tst, fd)) { |
| close(fd); |
| fprintf(stderr, Name ": 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<info.array.raid_disks && i < bestcnt ; i++) { |
| int j = best[i]; |
| if (j >= 0 && |
| !devices[j].uptodate && |
| devices[j].i.events == current_events) { |
| chosen_drive = j; |
| goto add_another; |
| } |
| } |
| } |
| |
| /* 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++) { |
| int j = best[i]; |
| int fd; |
| |
| if (j<0) |
| continue; |
| if (!devices[j].uptodate) |
| continue; |
| chosen_drive = j; |
| if ((fd=dev_open(devices[j].devname, O_RDONLY|O_EXCL))< 0) { |
| fprintf(stderr, Name ": Cannot open %s: %s\n", |
| devices[j].devname, strerror(errno)); |
| if (must_close) close(mdfd); |
| return 1; |
| } |
| if (st->ss->load_super(st,fd, NULL)) { |
| close(fd); |
| fprintf(stderr, Name ": RAID superblock has disappeared from %s\n", |
| devices[j].devname); |
| if (must_close) close(mdfd); |
| return 1; |
| } |
| close(fd); |
| } |
| if (st->sb == NULL) { |
| fprintf(stderr, Name ": No suitable drives found for %s\n", mddev); |
| if (must_close) close(mdfd); |
| return 1; |
| } |
| st->ss->getinfo_super(st, &info); |
| for (i=0; i<bestcnt; i++) { |
| int j = best[i]; |
| unsigned int desired_state; |
| |
| if (i < info.array.raid_disks) |
| desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC); |
| else |
| desired_state = 0; |
| |
| 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, |
| verbose, 0, NULL)) { |
| if (force) { |
| if (verbose >= 0) |
| fprintf(stderr, Name ": " |
| "clearing FAULTY flag for device %d in %s for %s\n", |
| j, mddev, devices[j].devname); |
| change = 1; |
| } else { |
| if (verbose >= -1) |
| fprintf(stderr, Name ": " |
| "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))) { |
| fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n", |
| i, mddev); |
| } |
| #endif |
| } |
| if (force && !clean && |
| !enough(info.array.level, info.array.raid_disks, |
| info.array.layout, clean, |
| avail, okcnt)) { |
| change += st->ss->update_super(st, &info, "force-array", |
| devices[chosen_drive].devname, verbose, |
| 0, NULL); |
| clean = 1; |
| } |
| |
| if (change) { |
| int fd; |
| fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL); |
| if (fd < 0) { |
| fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n", |
| devices[chosen_drive].devname); |
| if (must_close) close(mdfd); |
| return 1; |
| } |
| if (st->ss->store_super(st, fd)) { |
| close(fd); |
| fprintf(stderr, Name ": Could not re-write superblock on %s\n", |
| devices[chosen_drive].devname); |
| if (must_close) close(mdfd); |
| return 1; |
| } |
| 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 (info.reshape_active) { |
| int err = 0; |
| int *fdlist = malloc(sizeof(int)* bestcnt); |
| for (i=0; i<bestcnt; i++) { |
| int j = best[i]; |
| if (j >= 0) { |
| fdlist[i] = dev_open(devices[j].devname, O_RDWR|O_EXCL); |
| if (fdlist[i] < 0) { |
| fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n", |
| devices[j].devname); |
| err = 1; |
| break; |
| } |
| } else |
| fdlist[i] = -1; |
| } |
| if (!err) |
| err = Grow_restart(st, &info, fdlist, bestcnt, backup_file); |
| while (i>0) { |
| i--; |
| if (fdlist[i]>=0) close(fdlist[i]); |
| } |
| if (err) { |
| fprintf(stderr, Name ": Failed to restore critical section for reshape, sorry.\n"); |
| if (must_close) close(mdfd); |
| return err; |
| } |
| } |
| #endif |
| /* count number of in-sync devices according to the superblock. |
| * We must have this number to start the array without -s or -R |
| */ |
| req_cnt = info.array.working_disks; |
| |
| /* Almost ready to actually *do* something */ |
| if (!old_linux) { |
| int rv; |
| if ((vers % 100) >= 1) { /* can use different versions */ |
| mdu_array_info_t inf; |
| memset(&inf, 0, sizeof(inf)); |
| inf.major_version = st->ss->major; |
| inf.minor_version = st->minor_version; |
| rv = ioctl(mdfd, SET_ARRAY_INFO, &inf); |
| } else |
| rv = ioctl(mdfd, SET_ARRAY_INFO, NULL); |
| |
| if (rv) { |
| fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n", |
| mddev, strerror(errno)); |
| if (must_close) close(mdfd); |
| return 1; |
| } |
| if (ident->bitmap_fd >= 0) { |
| if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) { |
| fprintf(stderr, Name ": SET_BITMAP_FILE failed.\n"); |
| if (must_close) close(mdfd); |
| return 1; |
| } |
| } else if (ident->bitmap_file) { |
| /* From config file */ |
| int bmfd = open(ident->bitmap_file, O_RDWR); |
| if (bmfd < 0) { |
| fprintf(stderr, Name ": Could not open bitmap file %s\n", |
| ident->bitmap_file); |
| if (must_close) close(mdfd); |
| return 1; |
| } |
| if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) { |
| fprintf(stderr, Name ": Failed to set bitmapfile for %s\n", mddev); |
| close(bmfd); |
| if (must_close) close(mdfd); |
| 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].uptodate */) { |
| if (ioctl(mdfd, ADD_NEW_DISK, |
| &devices[j].i.disk)!=0) { |
| fprintf(stderr, Name ": failed to add " |
| "%s to %s: %s\n", |
| devices[j].devname, |
| mddev, |
| strerror(errno)); |
| if (i < info.array.raid_disks |
| || i == bestcnt) |
| okcnt--; |
| else |
| sparecnt--; |
| } else if (verbose > 0) |
| fprintf(stderr, Name ": added %s " |
| "to %s as %d\n", |
| devices[j].devname, mddev, |
| devices[j].i.disk.raid_disk); |
| } else if (verbose > 0 && i < info.array.raid_disks) |
| fprintf(stderr, Name ": no uptodate device for " |
| "slot %d of %s\n", |
| i, mddev); |
| } |
| |
| if (runstop == 1 || |
| (runstop <= 0 && |
| ( enough(info.array.level, info.array.raid_disks, |
| info.array.layout, clean, avail, okcnt) && |
| (okcnt >= req_cnt || start_partial_ok) |
| ))) { |
| if (ioctl(mdfd, RUN_ARRAY, NULL)==0) { |
| if (verbose >= 0) { |
| fprintf(stderr, Name ": %s has been started with %d drive%s", |
| mddev, okcnt, okcnt==1?"":"s"); |
| if (okcnt < info.array.raid_disks) |
| fprintf(stderr, " (out of %d)", info.array.raid_disks); |
| if (sparecnt) |
| fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s"); |
| fprintf(stderr, ".\n"); |
| } |
| if (info.reshape_active && |
| info.array.level >= 4 && |
| info.array.level <= 6) { |
| /* might need to increase the size |
| * of the stripe cache - default is 256 |
| */ |
| if (256 < 4 * (info.array.chunk_size/4096)) { |
| struct mdinfo *sra = sysfs_read(mdfd, 0, 0); |
| if (sra) |
| sysfs_set_num(sra, NULL, |
| "stripe_cache_size", |
| (4 * info.array.chunk_size / 4096) + 1); |
| } |
| } |
| if (must_close) { |
| int usecs = 1; |
| close(mdfd); |
| /* 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 if 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; |
| } |
| } |
| return 0; |
| } |
| fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n", |
| mddev, strerror(errno)); |
| |
| if (!enough(info.array.level, info.array.raid_disks, |
| info.array.layout, 1, avail, okcnt)) |
| fprintf(stderr, Name ": Not enough devices to " |
| "start the array.\n"); |
| else if (!enough(info.array.level, |
| info.array.raid_disks, |
| info.array.layout, clean, |
| avail, okcnt)) |
| fprintf(stderr, Name ": Not enough devices to " |
| "start the array while not clean " |
| "- consider --force.\n"); |
| |
| if (must_close) { |
| ioctl(mdfd, STOP_ARRAY, NULL); |
| close(mdfd); |
| } |
| return 1; |
| } |
| if (runstop == -1) { |
| fprintf(stderr, Name ": %s assembled from %d drive%s", |
| mddev, okcnt, okcnt==1?"":"s"); |
| if (okcnt != info.array.raid_disks) |
| fprintf(stderr, " (out of %d)", info.array.raid_disks); |
| fprintf(stderr, ", but not started.\n"); |
| if (must_close) close(mdfd); |
| return 0; |
| } |
| if (verbose >= -1) { |
| fprintf(stderr, Name ": %s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s"); |
| if (sparecnt) |
| fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s"); |
| if (!enough(info.array.level, info.array.raid_disks, |
| info.array.layout, 1, avail, okcnt)) |
| fprintf(stderr, " - not enough to start the array.\n"); |
| else if (!enough(info.array.level, |
| info.array.raid_disks, |
| info.array.layout, clean, |
| avail, okcnt)) |
| fprintf(stderr, " - not enough to start the " |
| "array while not clean - consider " |
| "--force.\n"); |
| else { |
| if (req_cnt == info.array.raid_disks) |
| fprintf(stderr, " - need all %d to start it", req_cnt); |
| else |
| fprintf(stderr, " - need %d of %d to start", req_cnt, info.array.raid_disks); |
| fprintf(stderr, " (use --run to insist).\n"); |
| } |
| } |
| if (must_close) { |
| ioctl(mdfd, STOP_ARRAY, NULL); |
| close(mdfd); |
| } |
| return 1; |
| } else { |
| /* The "chosen_drive" is a good choice, and if necessary, the superblock has |
| * been updated to point to the current locations of devices. |
| * so we can just start the array |
| */ |
| unsigned long dev; |
| dev = makedev(devices[chosen_drive].i.disk.major, |
| devices[chosen_drive].i.disk.minor); |
| if (ioctl(mdfd, START_ARRAY, dev)) { |
| fprintf(stderr, Name ": Cannot start array: %s\n", |
| strerror(errno)); |
| } |
| |
| } |
| if (must_close) close(mdfd); |
| return 0; |
| } |