]> git.ipfire.org Git - thirdparty/mdadm.git/blobdiff - Assemble.c
mdadm.h: Introduced unaligned {get,put}_unaligned{16,32}()
[thirdparty/mdadm.git] / Assemble.c
index 8940c27583a91cb5a4b9f5047db2b00d3f2eee44..420c7b3943eabc4cca8611867f77dc67c5b5b953 100644 (file)
@@ -1,7 +1,7 @@
 /*
  * mdadm - manage Linux "md" devices aka RAID arrays.
  *
- * Copyright (C) 2001-2013 Neil Brown <neilb@suse.de>
+ * Copyright (C) 2001-2016 Neil Brown <neilb@suse.com>
  *
  *
  *    This program is free software; you can redistribute it and/or modify
@@ -149,6 +149,7 @@ static int select_devices(struct mddev_dev *devlist,
        struct mdinfo *content = NULL;
        int report_mismatch = ((inargv && c->verbose >= 0) || c->verbose > 0);
        struct domainlist *domains = NULL;
+       dev_t rdev;
 
        tmpdev = devlist; num_devs = 0;
        while (tmpdev) {
@@ -169,7 +170,6 @@ static int select_devices(struct mddev_dev *devlist,
             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;
@@ -204,14 +204,7 @@ static int select_devices(struct mddev_dev *devlist,
                                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);
+               } else if (!fstat_is_blkdev(dfd, devname, &rdev)) {
                        tmpdev->used = 2;
                } else if (must_be_container(dfd)) {
                        if (st) {
@@ -222,21 +215,20 @@ static int select_devices(struct mddev_dev *devlist,
                                        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)) {
+                       } 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)),
+                                  !conf_test_metadata(tst->ss->name,
+                                                      (pol = devid_policy(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",
@@ -250,7 +242,9 @@ static int select_devices(struct mddev_dev *devlist,
                                        pr_err("no recogniseable superblock on %s\n",
                                               devname);
                                tmpdev->used = 2;
-                       } else if (tst->ss->load_super(tst,dfd, NULL)) {
+                       } 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);
@@ -261,7 +255,8 @@ static int select_devices(struct mddev_dev *devlist,
                                               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)),
+                                  !conf_test_metadata(tst->ss->name,
+                                                      (pol = devid_policy(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",
@@ -286,6 +281,8 @@ static int select_devices(struct mddev_dev *devlist,
                                st->ss->free_super(st);
                        dev_policy_free(pol);
                        domain_free(domains);
+                       if (tst)
+                               tst->ss->free_super(tst);
                        return -1;
                }
 
@@ -484,7 +481,7 @@ static int select_devices(struct mddev_dev *devlist,
                /* Collect domain information from members only */
                if (tmpdev && tmpdev->used == 1) {
                        if (!pol)
-                               pol = devid_policy(stb.st_rdev);
+                               pol = devid_policy(rdev);
                        domain_merge(&domains, pol, tst?tst->ss->name:NULL);
                }
                dev_policy_free(pol);
@@ -517,15 +514,12 @@ static int select_devices(struct mddev_dev *devlist,
 
        /* 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));
+               if (!stat_is_blkdev(tmpdev->devname, &rdev)) {
                        tmpdev->used = 2;
                } else {
-                       struct dev_policy *pol = devid_policy(stb.st_rdev);
+                       struct dev_policy *pol = devid_policy(rdev);
                        int dt = domain_test(domains, pol, NULL);
                        if (inargv && dt != 0)
                                /* take this spare as domains match
@@ -572,9 +566,7 @@ static int load_devices(struct devs *devices, char *devmap,
        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;
@@ -586,29 +578,29 @@ static int load_devices(struct devs *devices, char *devmap,
                struct supertype *tst;
                int i;
                int dfd;
+               int disk_state;
 
                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) {
-                               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);
+                       if (strcmp(c->update, "uuid") == 0 && !ident->uuid_set)
+                               random_uuid((__u8 *)ident->uuid);
+
+                       if (strcmp(c->update, "ppl") == 0 &&
+                           ident->bitmap_fd >= 0) {
+                               pr_err("PPL is not compatible with bitmap\n");
+                               close(mdfd);
+                               free(devices);
+                               free(devmap);
+                               return -1;
                        }
+
                        dfd = dev_open(devname,
                                       tmpdev->disposition == 'I'
                                       ? O_RDWR : (O_RDWR|O_EXCL));
@@ -637,11 +629,18 @@ static int load_devices(struct devs *devices, char *devmap,
                                err = 0;
                        else if (strcmp(c->update, "home-cluster") == 0) {
                                tst->cluster_name = c->homecluster;
-                               tst->ss->write_bitmap(tst, dfd, NameUpdate);
+                               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
+                       } 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,
@@ -677,9 +676,7 @@ static int load_devices(struct devs *devices, char *devmap,
                                else
                                        bitmap_done = 1;
                        }
-               } else
-#endif
-               {
+               } else {
                        dfd = dev_open(devname,
                                       tmpdev->disposition == 'I'
                                       ? O_RDWR : (O_RDWR|O_EXCL));
@@ -715,7 +712,9 @@ static int load_devices(struct devs *devices, char *devmap,
                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) {
+               disk_state = devices[devcnt].i.disk.state & ~((1<<MD_DISK_FAILFAST) |
+                                                             (1<<MD_DISK_WRITEMOSTLY));
+               if (disk_state == ((1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC))) {
                        if (most_recent < 0 ||
                            devices[devcnt].i.events
                            > devices[most_recent].i.events) {
@@ -733,7 +732,7 @@ static int load_devices(struct devs *devices, char *devmap,
                        i = devcnt;
                else
                        i = devices[devcnt].i.disk.raid_disk;
-               if (i+1 == 0) {
+               if (i+1 == 0 || i == MD_DISK_ROLE_JOURNAL) {
                        if (nextspare < content->array.raid_disks*2)
                                nextspare = content->array.raid_disks*2;
                        i = nextspare++;
@@ -762,12 +761,12 @@ static int load_devices(struct devs *devices, char *devmap,
                                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) {
+                           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.
@@ -785,10 +784,11 @@ static int load_devices(struct devs *devices, char *devmap,
                                *stp = st;
                                return -1;
                        }
-                       if (best[i] == -1
-                           || (devices[best[i]].i.events
-                               < devices[devcnt].i.events))
+                       if (best[i] == -1 || (devices[best[i]].i.events
+                                             < devices[devcnt].i.events))
                                best[i] = devcnt;
+                       else if (st->ss == &super_imsm)
+                               best[i+1] = devcnt;
                }
                devcnt++;
        }
@@ -810,14 +810,11 @@ static int force_array(struct mdinfo *content,
        int okcnt = 0;
        while (!enough(content->array.level, content->array.raid_disks,
                       content->array.layout, 1,
-                      avail)
-              ||
+                      avail) ||
               (content->reshape_active && content->delta_disks > 0 &&
                !enough(content->array.level, (content->array.raid_disks
                                               - content->delta_disks),
-                       content->new_layout, 1,
-                       avail)
-                      )) {
+                       content->new_layout, 1, avail))) {
                /* Choose the newest best drive which is
                 * not up-to-date, update the superblock
                 * and add it.
@@ -859,7 +856,19 @@ static int force_array(struct mdinfo *content,
                                        /* OK */;
                                else
                                        continue;
-                       }
+                       } else if (devices[j].i.reshape_active !=
+                           content->reshape_active ||
+                           (devices[j].i.reshape_active &&
+                           devices[j].i.reshape_progress !=
+                           content->reshape_progress))
+                               /* Here, it may be a source of data. If two
+                                * devices claim different progresses, it
+                                * means that reshape boundaries differ for
+                                * their own devices. Kernel will only treat
+                                * the first one as reshape progress and
+                                * go on. It may cause disaster, so avoid it.
+                                */
+                               continue;
                        if (chosen_drive < 0 ||
                             devices[j].i.events
                            > devices[chosen_drive].i.events)
@@ -870,7 +879,7 @@ static int force_array(struct mdinfo *content,
                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",
+                       pr_err("forcing event count in %s(%d) from %d up to %d\n",
                               devices[chosen_drive].devname,
                               devices[chosen_drive].i.disk.raid_disk,
                               (int)(devices[chosen_drive].i.events),
@@ -911,7 +920,6 @@ static int force_array(struct mdinfo *content,
                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
                 */
@@ -922,7 +930,13 @@ static int force_array(struct mdinfo *content,
                        if (j >= 0 &&
                            !devices[j].uptodate &&
                            devices[j].i.recovery_start == MaxSector &&
-                           devices[j].i.events == current_events) {
+                           devices[j].i.events == current_events &&
+                           ((!devices[j].i.reshape_active &&
+                           !content->reshape_active) ||
+                           (devices[j].i.reshape_active ==
+                           content->reshape_active &&
+                           devices[j].i.reshape_progress ==
+                           content->reshape_progress))) {
                                chosen_drive = j;
                                goto add_another;
                        }
@@ -942,6 +956,7 @@ static int start_array(int mdfd,
                       unsigned int okcnt,
                       unsigned int sparecnt,
                       unsigned int rebuilding_cnt,
+                      unsigned int journalcnt,
                       struct context *c,
                       int clean, char *avail,
                       int start_partial_ok,
@@ -953,6 +968,18 @@ static int start_array(int mdfd,
        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;
+       }
+
+       if (content->consistency_policy == CONSISTENCY_POLICY_PPL)
+               clean = 1;
+
        rv = set_array_info(mdfd, st, content);
        if (rv && !err_ok) {
                pr_err("failed to set array info for %s: %s\n",
@@ -981,7 +1008,7 @@ static int start_array(int mdfd,
        }
 
        /* First, add the raid disks, but add the chosen one last */
-       for (i=0; i<= bestcnt; i++) {
+       for (i = 0; i <= bestcnt; i++) {
                int j;
                if (i < bestcnt) {
                        j = best[i];
@@ -991,8 +1018,9 @@ static int start_array(int mdfd,
                        j = chosen_drive;
 
                if (j >= 0 && !devices[j].included) {
-                       int dfd = dev_open(devices[j].devname,
-                                          O_RDWR|O_EXCL);
+                       int dfd;
+
+                       dfd = dev_open(devices[j].devname, O_RDWR|O_EXCL);
                        if (dfd >= 0) {
                                remove_partitions(dfd);
                                close(dfd);
@@ -1001,28 +1029,30 @@ static int start_array(int mdfd,
 
                        if (rv) {
                                pr_err("failed to add %s to %s: %s\n",
-                                      devices[j].devname,
-                                      mddev,
+                                      devices[j].devname, mddev,
                                       strerror(errno));
-                               if (i < content->array.raid_disks * 2
-                                   || i == bestcnt)
+                               if (i < content->array.raid_disks * 2 ||
+                                   i == bestcnt)
                                        okcnt--;
                                else
                                        sparecnt--;
-                       } else if (c->verbose > 0)
+                       } 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":"");
+                                      (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)
+               } 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);
        }
@@ -1030,7 +1060,8 @@ static int start_array(int mdfd,
        if (content->array.level == LEVEL_CONTAINER) {
                if (c->verbose >= 0) {
                        pr_err("Container %s has been assembled with %d drive%s",
-                              mddev, okcnt+sparecnt, okcnt+sparecnt==1?"":"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);
@@ -1039,10 +1070,13 @@ static int start_array(int mdfd,
 
                if (st->ss->validate_container) {
                        struct mdinfo *devices_list;
-                       struct mdinfo *info_devices = xmalloc(sizeof(struct mdinfo)*(okcnt+sparecnt));
+                       struct mdinfo *info_devices;
                        unsigned int count;
+
                        devices_list = NULL;
-                       for (count = 0; count < okcnt+sparecnt; count++) {
+                       info_devices = xmalloc(sizeof(struct mdinfo) *
+                                              (okcnt + sparecnt));
+                       for (count = 0; count < okcnt + sparecnt; count++) {
                                info_devices[count] = devices[count].i;
                                info_devices[count].next = devices_list;
                                devices_list = &info_devices[count];
@@ -1068,17 +1102,16 @@ static int start_array(int mdfd,
 
        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)
-                    ))) {
+            (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) {
@@ -1098,12 +1131,11 @@ static int start_array(int mdfd,
                                                   c->backup_file, 0,
                                                   c->freeze_reshape);
                } else if (c->readonly &&
-                          sysfs_attribute_available(
-                                  content, NULL, "array_state")) {
+                          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) {
@@ -1111,11 +1143,19 @@ static int start_array(int mdfd,
                                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);
+                                       fprintf(stderr, " (out of %d)",
+                                               content->array.raid_disks);
                                if (rebuilding_cnt)
-                                       fprintf(stderr, "%s %d rebuilding", sparecnt?",":" and", rebuilding_cnt);
+                                       fprintf(stderr, "%s %d rebuilding",
+                                               sparecnt?",":" and",
+                                               rebuilding_cnt);
                                if (sparecnt)
-                                       fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
+                                       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 &&
@@ -1125,11 +1165,14 @@ static int start_array(int mdfd,
                                 * 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);
+                                       struct mdinfo *sra;
+
+                                       sra = sysfs_read(mdfd, NULL, 0);
                                        if (sra)
                                                sysfs_set_num(sra, NULL,
                                                              "stripe_cache_size",
@@ -1162,7 +1205,9 @@ static int start_array(int mdfd,
                        if (content->array.level == 6 &&
                            okcnt + 1 == (unsigned)content->array.raid_disks &&
                            was_forced) {
-                               struct mdinfo *sra = sysfs_read(mdfd, NULL, 0);
+                               struct mdinfo *sra;
+
+                               sra = sysfs_read(mdfd, NULL, 0);
                                if (sra)
                                        sysfs_set_str(sra, NULL,
                                                      "sync_action", "repair");
@@ -1170,45 +1215,47 @@ static int start_array(int mdfd,
                        }
                        return 0;
                }
-               pr_err("failed to RUN_ARRAY %s: %s\n",
-                      mddev, strerror(errno));
+               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))
+                                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");
+                      mddev, okcnt, okcnt == 1 ? "" : "s");
                if (okcnt != (unsigned)content->array.raid_disks)
-                       fprintf(stderr, " (out of %d)", 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");
+               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);
+                       fprintf(stderr, "%s %d rebuilding",
+                               sparecnt ? "," : " and", rebuilding_cnt);
                if (sparecnt)
-                       fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
+                       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))
+                                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);
+                               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");
@@ -1276,18 +1323,19 @@ int Assemble(struct supertype *st, char *mddev,
         *    START_ARRAY
         *
         */
-       int rv;
-       int mdfd;
+       int rv = -1;
+       int mdfd = -1;
        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;
+                         ident->super_minor == UnSet && ident->name[0] == 0 &&
+                         (ident->container == NULL || ident->member == NULL));
+       struct devs *devices = NULL;
        char *devmap;
        int *best = NULL; /* indexed by raid_disk */
        int bestcnt = 0;
        int devcnt;
-       unsigned int okcnt, sparecnt, rebuilding_cnt, replcnt;
+       unsigned int okcnt, sparecnt, rebuilding_cnt, replcnt, journalcnt;
+       int journal_clean = 0;
        int i;
        int was_forced = 0;
        int most_recent = 0;
@@ -1343,7 +1391,7 @@ try_again:
                       mddev ? mddev : "further assembly");
 
        content = &info;
-       if (st)
+       if (st && c->force)
                st->ignore_hw_compat = 1;
        num_devs = select_devices(devlist, ident, &st, &content, c,
                                  inargv, auto_assem);
@@ -1379,7 +1427,7 @@ try_again:
                        pr_err("Found some drive for an array that is already active: %s\n",
                               mp->path);
                        pr_err("giving up.\n");
-                       return 1;
+                       goto out;
                }
                for (dv = pre_exist->devs; dv; dv = dv->next) {
                        /* We want to add this device to our list,
@@ -1446,23 +1494,15 @@ try_again:
                        name = strchr(name, ':')+1;
 
                mdfd = create_mddev(mddev, name, ident->autof, trustworthy,
-                                   chosen_name);
+                                   chosen_name, 0);
        }
        if (mdfd < 0) {
                st->ss->free_super(st);
                if (auto_assem)
                        goto try_again;
-               return 1;
+               goto out;
        }
        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",
@@ -1479,13 +1519,12 @@ try_again:
                        st->ss->free_super(st);
                        if (auto_assem)
                                goto try_again;
-                       return 1;
+                       goto out;
                }
                /* 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;
@@ -1494,25 +1533,30 @@ try_again:
                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) {
+               mdfd = -3;
+               /*
+                * devices is already freed in load_devices, so set devices
+                * to NULL to avoid double free devices.
+                */
+               devices = NULL;
+               goto out;
+       }
 
        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;
+               goto out;
        }
 
        if (c->update && strcmp(c->update, "byteorder")==0)
@@ -1528,6 +1572,7 @@ try_again:
        okcnt = 0;
        replcnt = 0;
        sparecnt=0;
+       journalcnt=0;
        rebuilding_cnt=0;
        for (i=0; i< bestcnt; i++) {
                int j = best[i];
@@ -1538,8 +1583,13 @@ try_again:
                /* 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_ACTIVE))) {
+               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;
@@ -1547,6 +1597,7 @@ try_again:
                                }
                                continue;
                        }
+               }
                /* If this device thinks that 'most_recent' has failed, then
                 * we must reject this device.
                 */
@@ -1570,6 +1621,8 @@ try_again:
                    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 &&
@@ -1581,7 +1634,7 @@ try_again:
                                                replcnt++;
                                } else
                                        rebuilding_cnt++;
-                       } else
+                       } else if (devices[j].i.disk.raid_disk != MD_DISK_ROLE_JOURNAL)
                                sparecnt++;
                }
        }
@@ -1617,43 +1670,46 @@ try_again:
                                 : (O_RDONLY|O_EXCL)))< 0) {
                        pr_err("Cannot open %s: %s\n",
                               devices[j].devname, strerror(errno));
-                       close(mdfd);
-                       free(devices);
-                       return 1;
+                       goto out;
                }
                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;
+                       goto out;
                }
                close(fd);
        }
        if (st->sb == NULL) {
                pr_err("No suitable drives found for %s\n", mddev);
-               close(mdfd);
-               free(devices);
-               return 1;
+               goto out;
        }
        st->ss->getinfo_super(st, content, NULL);
-#ifndef MDASSEMBLE
-       sysfs_init(content, mdfd, NULL);
-#endif
+       if (sysfs_init(content, mdfd, NULL)) {
+               pr_err("Unable to initialize sysfs\n");
+               goto out;
+       }
+
+       /* 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 (i >= content->array.raid_disks * 2)
+               if (j < 0)
+                       continue;
+               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;
+               desired_state |= devices[j].i.disk.state & ((1<<MD_DISK_FAILFAST) |
+                                                           (1<<MD_DISK_WRITEMOSTLY));
+
                if (!devices[j].uptodate)
                        continue;
 
@@ -1700,17 +1756,13 @@ try_again:
                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;
+                       goto out;
                }
                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;
+                       goto out;
                }
                if (c->verbose >= 0)
                        pr_err("Marking array %s as 'clean'\n",
@@ -1722,7 +1774,6 @@ try_again:
         * 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;
@@ -1769,12 +1820,9 @@ try_again:
                        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;
+                       goto out;
                }
        }
-#endif
 
        /* Almost ready to actually *do* something */
        /* First, fill in the map, so that udev can find our name
@@ -1792,7 +1840,7 @@ try_again:
        rv = start_array(mdfd, mddev, content,
                         st, ident, best, bestcnt,
                         chosen_drive, devices, okcnt, sparecnt,
-                        rebuilding_cnt,
+                        rebuilding_cnt, journalcnt,
                         c,
                         clean, avail, start_partial_ok,
                         pre_exist != NULL,
@@ -1800,6 +1848,7 @@ try_again:
        if (rv == 1 && !pre_exist)
                ioctl(mdfd, STOP_ARRAY, NULL);
        free(devices);
+out:
        map_unlock(&map);
        if (rv == 0) {
                wait_for(chosen_name, mdfd);
@@ -1830,14 +1879,17 @@ try_again:
                                usecs <<= 1;
                        }
                }
-       } else
+       } else if (mdfd >= 0)
                close(mdfd);
 
        /* '2' means 'OK, but not started yet' */
+       if (rv == -1) {
+               free(devices);
+               return 1;
+       }
        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)
@@ -1845,13 +1897,15 @@ int assemble_container_content(struct supertype *st, int mdfd,
        struct mdinfo *dev, *sra, *dev2;
        int working = 0, preexist = 0;
        int expansion = 0;
-       struct map_ent *map = NULL;
        int old_raid_disks;
        int start_reshape;
-       char *avail = NULL;
+       char *avail;
        int err;
 
-       sysfs_init(content, mdfd, NULL);
+       if (sysfs_init(content, mdfd, NULL)) {
+               pr_err("Unable to initialize sysfs\n");
+               return 1;
+       }
 
        sra = sysfs_read(mdfd, NULL, GET_VERSION|GET_DEVS);
        if (sra == NULL || strcmp(sra->text_version, content->text_version) != 0) {
@@ -1860,9 +1914,8 @@ int assemble_container_content(struct supertype *st, int mdfd,
                    c->readonly &&
                    content->text_version[0] == '/')
                        content->text_version[0] = '-';
-               if (sysfs_set_array(content, md_get_version(mdfd)) != 0) {
-                       if (sra)
-                               sysfs_free(sra);
+               if (sysfs_set_array(content, 9003) != 0) {
+                       sysfs_free(sra);
                        return 1;
                }
        }
@@ -1915,10 +1968,57 @@ int assemble_container_content(struct supertype *st, int mdfd,
                free(avail);
                return 1;/* Nothing new, don't try to start */
        }
-       map_update(&map, fd2devnm(mdfd),
-                  content->text_version,
+       map_update(NULL, fd2devnm(mdfd), content->text_version,
                   content->uuid, chosen_name);
 
+       if (content->consistency_policy == CONSISTENCY_POLICY_PPL &&
+           st->ss->validate_ppl) {
+               content->array.state |= 1;
+               err = 0;
+
+               for (dev = content->devs; dev; dev = dev->next) {
+                       int dfd;
+                       char *devpath;
+                       int ret;
+
+                       ret = st->ss->validate_ppl(st, content, dev);
+                       if (ret == 0)
+                               continue;
+
+                       if (ret < 0) {
+                               err = 1;
+                               break;
+                       }
+
+                       if (!c->force) {
+                               pr_err("%s contains invalid PPL - consider --force or --update-subarray with --update=no-ppl\n",
+                                       chosen_name);
+                               content->array.state &= ~1;
+                               avail[dev->disk.raid_disk] = 0;
+                               break;
+                       }
+
+                       /* have --force - overwrite the invalid ppl */
+                       devpath = map_dev(dev->disk.major, dev->disk.minor, 0);
+                       dfd = dev_open(devpath, O_RDWR);
+                       if (dfd < 0) {
+                               pr_err("Failed to open %s\n", devpath);
+                               err = 1;
+                               break;
+                       }
+
+                       err = st->ss->write_init_ppl(st, content, dfd);
+                       close(dfd);
+
+                       if (err)
+                               break;
+               }
+
+               if (err) {
+                       free(avail);
+                       return err;
+               }
+       }
 
        if (enough(content->array.level, content->array.raid_disks,
                   content->array.layout, content->array.state & 1, avail) == 0) {
@@ -1961,8 +2061,22 @@ int assemble_container_content(struct supertype *st, int mdfd,
                                   spare, &c->backup_file, c->verbose) == 1)
                        return 1;
 
-               err = sysfs_set_str(content, NULL,
-                                   "array_state", "readonly");
+               if (content->reshape_progress == 0) {
+                       /* If reshape progress is 0 - we are assembling the
+                        * array that was stopped, before reshape has started.
+                        * Array needs to be started as active, Grow_continue()
+                        * will start the reshape.
+                        */
+                       sysfs_set_num(content, NULL, "reshape_position",
+                                     MaxSector);
+                       err = sysfs_set_str(content, NULL,
+                                           "array_state", "active");
+                       sysfs_set_num(content, NULL, "reshape_position", 0);
+               } else {
+                       err = sysfs_set_str(content, NULL,
+                                           "array_state", "readonly");
+               }
+
                if (err)
                        return 1;
 
@@ -2032,4 +2146,3 @@ int assemble_container_content(struct supertype *st, int mdfd,
        return err;
        /* FIXME should have an O_EXCL and wait for read-auto */
 }
-#endif