]> git.ipfire.org Git - thirdparty/mdadm.git/blobdiff - Assemble.c
Introduce pr_err for printing error messages.
[thirdparty/mdadm.git] / Assemble.c
index bfc879c7f4433550aa25e80dc1fd39156544582f..f06fb5c10de000770947587f4c9966ab26f514d6 100644 (file)
@@ -81,36 +81,34 @@ static int ident_matches(struct mddev_ident *ident,
            same_uuid(content->uuid, ident->uuid, tst->ss->swapuuid)==0 &&
            memcmp(content->uuid, uuid_zero, sizeof(int[4])) != 0) {
                if (devname)
-                       fprintf(stderr, Name ": %s has wrong uuid.\n",
-                               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)==0) {
                if (devname)
-                       fprintf(stderr, Name ": %s has wrong name.\n",
-                               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)
-                       fprintf(stderr, Name ": %s has wrong super-minor.\n",
-                               devname);
+                       pr_err("%s has wrong super-minor.\n",
+                              devname);
                return 0;
        }
        if (ident->level != UnSet &&
            ident->level != content->array.level) {
                if (devname)
-                       fprintf(stderr, Name ": %s has wrong raid level.\n",
-                               devname);
+                       pr_err("%s has wrong raid level.\n",
+                              devname);
                return 0;
        }
        if (ident->raid_disks != UnSet &&
            ident->raid_disks!= content->array.raid_disks) {
                if (devname)
-                       fprintf(stderr, Name ": %s requires wrong number of drives.\n",
-                               devname);
+                       pr_err("%s requires wrong number of drives.\n",
+                              devname);
                return 0;
        }
        if (ident->member && ident->member[0]) {
@@ -118,13 +116,13 @@ static int ident_matches(struct mddev_ident *ident,
                char *s = strchr(content->text_version+1, '/');
                if (s == NULL) {
                        if (devname)
-                               fprintf(stderr, Name ": %s is not a container and one is required.\n",
-                                       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)
-                               fprintf(stderr, Name ": skipping wrong member %s is %s\n",
-                                       content->text_version, devname);
+                               pr_err("skipping wrong member %s is %s\n",
+                                      content->text_version, devname);
                        return 0;
                }
        }
@@ -138,7 +136,7 @@ int Assemble(struct supertype *st, char *mddev,
             char *backup_file, int invalid_backup,
             int readonly, int runstop,
             char *update, char *homehost, int require_homehost,
-            int verbose, int force)
+            int verbose, int force, int freeze_reshape)
 {
        /*
         * The task of Assemble is to find a collection of
@@ -220,7 +218,9 @@ int Assemble(struct supertype *st, char *mddev,
        int change = 0;
        int inargv = 0;
        int report_missmatch;
+#ifndef MDASSEMBLE
        int bitmap_done;
+#endif
        int start_partial_ok = (runstop >= 0) && 
                (force || devlist==NULL || auto_assem);
        unsigned int num_devs;
@@ -251,8 +251,8 @@ int Assemble(struct supertype *st, char *mddev,
            ident->name[0] == 0 &&
            (ident->container == NULL || ident->member == NULL) &&
            ident->devices == NULL) {
-               fprintf(stderr, Name ": No identity information available for %s - cannot assemble.\n",
-                       mddev ? mddev : "further assembly");
+               pr_err("No identity information available for %s - cannot assemble.\n",
+                      mddev ? mddev : "further assembly");
                return 1;
        }
 
@@ -280,8 +280,8 @@ int Assemble(struct supertype *st, char *mddev,
        if (!st && ident->st) st = ident->st;
 
        if (verbose>0)
-           fprintf(stderr, Name ": looking for devices for %s\n",
-                   mddev ? mddev : "further assembly");
+               pr_err("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.
@@ -293,7 +293,7 @@ int Assemble(struct supertype *st, char *mddev,
                char *devname = tmpdev->devname;
                int dfd;
                struct stat stb;
-               struct supertype *tst = dup_super(st);
+               struct supertype *tst;
                struct dev_policy *pol = NULL;
                int found_container = 0;
 
@@ -302,24 +302,26 @@ int Assemble(struct supertype *st, char *mddev,
                if (ident->devices &&
                    !match_oneof(ident->devices, devname)) {
                        if (report_missmatch)
-                               fprintf(stderr, Name ": %s is not one of %s\n", devname, ident->devices);
+                               pr_err("%s is not one of %s\n", devname, ident->devices);
                        continue;
                }
 
-               dfd = dev_open(devname, O_RDONLY|O_EXCL);
+               tst = dup_super(st);
+
+               dfd = dev_open(devname, O_RDONLY);
                if (dfd < 0) {
                        if (report_missmatch)
-                               fprintf(stderr, Name ": cannot open device %s: %s\n",
-                                       devname, strerror(errno));
+                               pr_err("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));
+                       pr_err("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);
+                       pr_err("%s is not a block device.\n",
+                              devname);
                        tmpdev->used = 2;
                } else if (must_be_container(dfd)) {
                        if (st) {
@@ -327,55 +329,55 @@ int Assemble(struct supertype *st, char *mddev,
                                 * be another one.
                                 */
                                if (report_missmatch)
-                                       fprintf(stderr, Name ": %s is a container, but we are looking for components\n",
-                                               devname);
+                                       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_missmatch)
-                                       fprintf(stderr, Name ": not a recognisable container: %s\n",
-                                               devname);
+                                       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_missmatch)
-                                       fprintf(stderr, Name ": no correct container type: %s\n",
-                                               devname);
+                                       pr_err("no correct container type: %s\n",
+                                              devname);
                                tmpdev->used = 2;
                        } else if (auto_assem &&
                                   !conf_test_metadata(tst->ss->name, (pol = devnum_policy(stb.st_rdev)),
                                                       tst->ss->match_home(tst, homehost) == 1)) {
                                if (report_missmatch)
-                                       fprintf(stderr, Name ": %s has metadata type %s for which "
-                                               "auto-assembly is disabled\n",
-                                               devname, tst->ss->name);
+                                       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_missmatch)
-                                       fprintf(stderr, Name ": no recogniseable superblock on %s\n",
-                                               devname);
+                                       pr_err("no recogniseable superblock on %s\n",
+                                              devname);
                                tmpdev->used = 2;
                        } else if (tst->ss->load_super(tst,dfd, NULL)) {
                                if (report_missmatch)
-                                       fprintf(stderr, Name ": no RAID superblock on %s\n",
-                                               devname);
+                                       pr_err("no RAID superblock on %s\n",
+                                              devname);
                                tmpdev->used = 2;
                        } else if (tst->ss->compare_super == NULL) {
                                if (report_missmatch)
-                                       fprintf(stderr, Name ": Cannot assemble %s metadata on %s\n",
-                                               tst->ss->name, devname);
+                                       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 = devnum_policy(stb.st_rdev)),
                                                       tst->ss->match_home(tst, homehost) == 1)) {
                                if (report_missmatch)
-                                       fprintf(stderr, Name ": %s has metadata type %s for which "
-                                               "auto-assembly is disabled\n",
-                                               devname, tst->ss->name);
+                                       pr_err("%s has metadata type %s for which "
+                                              "auto-assembly is disabled\n",
+                                              devname, tst->ss->name);
                                tmpdev->used = 2;
                        }
                }
@@ -391,7 +393,7 @@ int Assemble(struct supertype *st, char *mddev,
                                goto loop;
                            
 
-                       fprintf(stderr, Name ": %s has no superblock - assembly aborted\n",
+                       pr_err("%s has no superblock - assembly aborted\n",
                                devname);
                        if (st)
                                st->ss->free_super(st);
@@ -404,12 +406,23 @@ int Assemble(struct supertype *st, char *mddev,
                        /* 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_missmatch)
+                                       pr_err("%s is busy - skipping\n", devname);
+                               goto loop;
+                       }
+                       close(dfd);
 
                        if (ident->container) {
                                if (ident->container[0] == '/' &&
                                    !same_dev(ident->container, devname)) {
                                        if (report_missmatch)
-                                               fprintf(stderr, Name ": %s is not the container required (%s)\n",
+                                               pr_err("%s is not the container required (%s)\n",
                                                        devname, ident->container);
                                        goto loop;
                                }
@@ -418,13 +431,12 @@ int Assemble(struct supertype *st, char *mddev,
                                        int uuid[4];
 
                                        content = &info;
-                                       memset(content, 0, sizeof(*content));
                                        tst->ss->getinfo_super(tst, content, NULL);
 
                                        if (!parse_uuid(ident->container, uuid) ||
                                            !same_uuid(content->uuid, uuid, tst->ss->swapuuid)) {
                                                if (report_missmatch)
-                                                       fprintf(stderr, Name ": %s has wrong UUID to be required container\n",
+                                                       pr_err("%s has wrong UUID to be required container\n",
                                                                devname);
                                                goto loop;
                                        }
@@ -433,29 +445,27 @@ int Assemble(struct supertype *st, char *mddev,
                        /* It is worth looking inside this container.
                         */
                        if (verbose > 0)
-                               fprintf(stderr, Name ": looking in container %s\n",
+                               pr_err("looking in container %s\n",
                                        devname);
 
                        for (content = tst->ss->container_content(tst, NULL);
                             content;
                             content = content->next) {
 
-                               /* do not assemble arrays that might have bad blocks */
-                               if (content->array.state & (1<<MD_SB_BBM_ERRORS)) {
-                                       fprintf(stderr, Name ": BBM log found in metadata. "
-                                                               "Cannot activate array(s).\n");
-                                       tmpdev->used = 2;
-                                       goto loop;
-                               }
                                if (!ident_matches(ident, content, tst,
                                                   homehost, update,
                                                   report_missmatch ? devname : NULL))
                                        /* message already printed */;
                                else if (is_member_busy(content->text_version)) {
                                        if (report_missmatch)
-                                               fprintf(stderr, Name ": member %s in %s is already assembled\n",
+                                               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;
                        }
@@ -466,7 +476,7 @@ int Assemble(struct supertype *st, char *mddev,
 
                        st = tst; tst = NULL;
                        if (!auto_assem && inargv && tmpdev->next != NULL) {
-                               fprintf(stderr, Name ": %s is a container, but is not "
+                               pr_err("%s is a container, but is not "
                                        "only device given: confused and aborting\n",
                                        devname);
                                st->ss->free_super(st);
@@ -475,7 +485,7 @@ int Assemble(struct supertype *st, char *mddev,
                                return 1;
                        }
                        if (verbose > 0)
-                               fprintf(stderr, Name ": found match on member %s in %s\n",
+                               pr_err("found match on member %s in %s\n",
                                        content->text_version, devname);
 
                        /* make sure we finished the loop */
@@ -484,7 +494,6 @@ int Assemble(struct supertype *st, char *mddev,
                } else {
 
                        content = &info;
-                       memset(content, 0, sizeof(*content));
                        tst->ss->getinfo_super(tst, content, NULL);
 
                        if (!ident_matches(ident, content, tst,
@@ -492,6 +501,18 @@ int Assemble(struct supertype *st, char *mddev,
                                           report_missmatch ? devname : NULL))
                                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_missmatch)
+                                       pr_err("%s is busy - skipping\n", devname);
+                               goto loop;
+                       }
+                       close(dfd);
+
                        if (st == NULL)
                                st = dup_super(tst);
                        if (st->minor_version == -1)
@@ -526,13 +547,13 @@ int Assemble(struct supertype *st, char *mddev,
                                                /* We can do something */
                                                if (first) {/* just ignore this one */
                                                        if (report_missmatch)
-                                                               fprintf(stderr, Name ": %s misses out due to wrong homehost\n",
+                                                               pr_err("%s misses out due to wrong homehost\n",
                                                                        devname);
                                                        goto loop;
                                                } else { /* reject all those sofar */
                                                        struct mddev_dev *td;
                                                        if (report_missmatch)
-                                                               fprintf(stderr, Name ": %s overrides previous devices due to good homehost\n",
+                                                               pr_err("%s overrides previous devices due to good homehost\n",
                                                                        devname);
                                                        for (td=devlist; td != tmpdev; td=td->next)
                                                                if (td->used == 1)
@@ -542,7 +563,7 @@ int Assemble(struct supertype *st, char *mddev,
                                                }
                                        }
                                }
-                               fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n",
+                               pr_err("superblock on %s doesn't match others - assembly aborted\n",
                                        devname);
                                tst->ss->free_super(tst);
                                st->ss->free_super(st);
@@ -593,7 +614,7 @@ int Assemble(struct supertype *st, char *mddev,
                if (tmpdev->used != 3)
                        continue;
                if (stat(tmpdev->devname, &stb)< 0) {
-                       fprintf(stderr, Name ": fstat failed for %s: %s\n",
+                       pr_err("fstat failed for %s: %s\n",
                                tmpdev->devname, strerror(errno));
                        tmpdev->used = 2;
                } else {
@@ -669,20 +690,20 @@ int Assemble(struct supertype *st, char *mddev,
        mddev = chosen_name;
        vers = md_get_version(mdfd);
        if (vers < 9000) {
-               fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n"
+               pr_err("Assemble requires driver version 0.90.0 or later.\n"
                        "    Upgrade your kernel or try --build\n");
                close(mdfd);
                return 1;
        }
        if (mddev_busy(fd2devnum(mdfd))) {
-               fprintf(stderr, Name ": %s already active, cannot restart it!\n",
+               pr_err("%s already active, cannot restart it!\n",
                        mddev);
                for (tmpdev = devlist ;
                     tmpdev && tmpdev->used != 1;
                     tmpdev = tmpdev->next)
                        ;
                if (tmpdev && auto_assem)
-                       fprintf(stderr, Name ":   %s needed for %s...\n",
+                       pr_err("%s needed for %s...\n",
                                mddev, tmpdev->devname);
                close(mdfd);
                mdfd = -3;
@@ -699,14 +720,13 @@ int Assemble(struct supertype *st, char *mddev,
                int err;
                err = assemble_container_content(st, mdfd, content, runstop,
                                                 chosen_name, verbose,
-                                                backup_file);
+                                                backup_file, freeze_reshape);
                close(mdfd);
                return err;
        }
+       bitmap_done = 0;
 #endif
        /* Ok, no bad inconsistancy, we can try updating etc */
-       bitmap_done = 0;
-       content->update_private = NULL;
        devices = malloc(num_devs * sizeof(*devices));
        devmap = calloc(num_devs * content->array.raid_disks, 1);
        for (tmpdev = devlist; tmpdev; tmpdev=tmpdev->next) if (tmpdev->used == 1) {
@@ -738,7 +758,7 @@ int Assemble(struct supertype *st, char *mddev,
 
                        tst = dup_super(st);
                        if (dfd < 0 || tst->ss->load_super(tst, dfd, NULL) != 0) {
-                               fprintf(stderr, Name ": cannot re-read metadata from %s - aborting\n",
+                               pr_err("cannot re-read metadata from %s - aborting\n",
                                        devname);
                                if (dfd >= 0)
                                        close(dfd);
@@ -761,10 +781,9 @@ int Assemble(struct supertype *st, char *mddev,
                                                            ident->uuid_set,
                                                            homehost);
                        if (err < 0) {
-                               fprintf(stderr,
-                                       Name ": --update=%s not understood"
-                                       " for %s metadata\n",
-                                       update, tst->ss->name);
+                               pr_err("--update=%s not understood"
+                                      " for %s metadata\n",
+                                      update, tst->ss->name);
                                tst->ss->free_super(tst);
                                free(tst);
                                close(mdfd);
@@ -779,7 +798,7 @@ int Assemble(struct supertype *st, char *mddev,
                                memcpy(ident->uuid, content->uuid, 16);
                        }
                        if (tst->ss->store_super(tst, dfd))
-                               fprintf(stderr, Name ": Could not re-write superblock on %s.\n",
+                               pr_err("Could not re-write superblock on %s.\n",
                                        devname);
                        close(dfd);
 
@@ -788,7 +807,7 @@ int Assemble(struct supertype *st, char *mddev,
                                if (bitmap_update_uuid(ident->bitmap_fd,
                                                       content->uuid,
                                                       tst->ss->swapuuid) != 0)
-                                       fprintf(stderr, Name ": Could not update uuid on external bitmap.\n");
+                                       pr_err("Could not update uuid on external bitmap.\n");
                                else
                                        bitmap_done = 1;
                        }
@@ -801,7 +820,7 @@ int Assemble(struct supertype *st, char *mddev,
                        dfd = dev_open(devname, O_RDWR|O_EXCL);
 
                        if (dfd < 0 || tst->ss->load_super(tst, dfd, NULL) != 0) {
-                               fprintf(stderr, Name ": cannot re-read metadata from %s - aborting\n",
+                               pr_err("cannot re-read metadata from %s - aborting\n",
                                        devname);
                                if (dfd >= 0)
                                        close(dfd);
@@ -818,7 +837,7 @@ int Assemble(struct supertype *st, char *mddev,
                stat(devname, &stb);
 
                if (verbose > 0)
-                       fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n",
+                       pr_err("%s is identified as a member of %s, slot %d.\n",
                                devname, mddev, content->disk.raid_disk);
                devices[devcnt].devname = devname;
                devices[devcnt].uptodate = 0;
@@ -869,7 +888,7 @@ int Assemble(struct supertype *st, char *mddev,
                                 * Could be a mis-detection caused by overlapping
                                 * partitions.  fail-safe.
                                 */
-                               fprintf(stderr, Name ": WARNING %s and %s appear"
+                               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"
@@ -891,11 +910,9 @@ int Assemble(struct supertype *st, char *mddev,
                }
                devcnt++;
        }
-       free(content->update_private);
-       content->update_private = NULL;
 
        if (devcnt == 0) {
-               fprintf(stderr, Name ": no devices found for %s\n",
+               pr_err("no devices found for %s\n",
                        mddev);
                if (st)
                        st->ss->free_super(st);
@@ -937,7 +954,7 @@ int Assemble(struct supertype *st, char *mddev,
                                }
                                continue;
                        }
-               /* If this devices thinks that 'most_recent' has failed, then
+               /* If this device thinks that 'most_recent' has failed, then
                 * we must reject this device.
                 */
                if (j != most_recent &&
@@ -945,7 +962,7 @@ int Assemble(struct supertype *st, char *mddev,
                    devices[most_recent].i.disk.raid_disk >= 0 &&
                    devmap[j * content->array.raid_disks + devices[most_recent].i.disk.raid_disk] == 0) {
                        if (verbose > -1)
-                               fprintf(stderr, Name ": ignoring %s as it reports %s as failed\n",
+                               pr_err("ignoring %s as it reports %s as failed\n",
                                        devices[j].devname, devices[most_recent].devname);
                        best[i] = -1;
                        continue;
@@ -956,7 +973,9 @@ int Assemble(struct supertype *st, char *mddev,
                        if (i < content->array.raid_disks) {
                                if (devices[j].i.recovery_start == MaxSector ||
                                    (content->reshape_active &&
-                                    j >= content->array.raid_disks - content->delta_disks)) {
+                                    ((i >= content->array.raid_disks - content->delta_disks) ||
+                                     (i >= content->array.raid_disks - content->delta_disks - 1
+                                      && content->array.level == 4)))) {
                                        okcnt++;
                                        avail[i]=1;
                                } else
@@ -966,9 +985,17 @@ int Assemble(struct supertype *st, char *mddev,
                }
        }
        free(devmap);
-       while (force && !enough(content->array.level, content->array.raid_disks,
-                               content->array.layout, 1,
-                               avail, okcnt)) {
+       while (force &&
+              (!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.
@@ -992,14 +1019,14 @@ int Assemble(struct supertype *st, char *mddev,
                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",
+                       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, O_RDWR|O_EXCL);
                if (fd < 0) {
-                       fprintf(stderr, Name ": Couldn't open %s for write - not updating\n",
+                       pr_err("Couldn't open %s for write - not updating\n",
                                devices[chosen_drive].devname);
                        devices[chosen_drive].i.events = 0;
                        continue;
@@ -1007,7 +1034,7 @@ int Assemble(struct supertype *st, char *mddev,
                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",
+                       pr_err("RAID superblock disappeared from %s - not updating.\n",
                                devices[chosen_drive].devname);
                        devices[chosen_drive].i.events = 0;
                        continue;
@@ -1019,7 +1046,7 @@ int Assemble(struct supertype *st, char *mddev,
 
                if (tst->ss->store_super(tst, fd)) {
                        close(fd);
-                       fprintf(stderr, Name ": Could not re-write superblock on %s\n",
+                       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);
@@ -1039,6 +1066,7 @@ int Assemble(struct supertype *st, char *mddev,
                        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;
@@ -1062,9 +1090,11 @@ int Assemble(struct supertype *st, char *mddev,
                        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, O_RDONLY|O_EXCL))< 0) {
-                       fprintf(stderr, Name ": Cannot open %s: %s\n",
+                       pr_err("Cannot open %s: %s\n",
                                devices[j].devname, strerror(errno));
                        close(mdfd);
                        free(devices);
@@ -1072,7 +1102,7 @@ int Assemble(struct supertype *st, char *mddev,
                }
                if (st->ss->load_super(st,fd, NULL)) {
                        close(fd);
-                       fprintf(stderr, Name ": RAID superblock has disappeared from %s\n",
+                       pr_err("RAID superblock has disappeared from %s\n",
                                devices[j].devname);
                        close(mdfd);
                        free(devices);
@@ -1081,7 +1111,7 @@ int Assemble(struct supertype *st, char *mddev,
                close(fd);
        }
        if (st->sb == NULL) {
-               fprintf(stderr, Name ": No suitable drives found for %s\n", mddev);
+               pr_err("No suitable drives found for %s\n", mddev);
                close(mdfd);
                free(devices);
                return 1;
@@ -1112,20 +1142,18 @@ int Assemble(struct supertype *st, char *mddev,
                                         verbose, 0, NULL)) {
                        if (force) {
                                if (verbose >= 0)
-                                       fprintf(stderr, Name ": "
-                                               "clearing FAULTY flag for device %d in %s for %s\n",
+                                       pr_err("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",
+                                       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))) {
-                       fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
+                       pr_err("devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
                                i, mddev);
                }
 #endif
@@ -1133,7 +1161,7 @@ int Assemble(struct supertype *st, char *mddev,
        if (force && !clean &&
            !enough(content->array.level, content->array.raid_disks,
                    content->array.layout, clean,
-                   avail, okcnt)) {
+                   avail)) {
                change += st->ss->update_super(st, content, "force-array",
                                        devices[chosen_drive].devname, verbose,
                                               0, NULL);
@@ -1144,7 +1172,7 @@ int Assemble(struct supertype *st, char *mddev,
                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",
+                       pr_err("Could not open %s for write - cannot Assemble array.\n",
                                devices[chosen_drive].devname);
                        close(mdfd);
                        free(devices);
@@ -1152,12 +1180,15 @@ int Assemble(struct supertype *st, char *mddev,
                }
                if (st->ss->store_super(st, fd)) {
                        close(fd);
-                       fprintf(stderr, Name ": Could not re-write superblock on %s\n",
+                       pr_err("Could not re-write superblock on %s\n",
                                devices[chosen_drive].devname);
                        close(mdfd);
                        free(devices);
                        return 1;
                }
+               if (verbose >= 0)
+                       pr_err("Marking array %s as 'clean'\n",
+                               mddev);
                close(fd);
        }
 
@@ -1170,7 +1201,7 @@ int Assemble(struct supertype *st, char *mddev,
                int err = 0;
                int *fdlist = malloc(sizeof(int)* bestcnt);
                if (verbose > 0)
-                       fprintf(stderr, Name ":%s has an active reshape - checking "
+                       pr_err(":%s has an active reshape - checking "
                                "if critical section needs to be restored\n",
                                chosen_name);
                for (i=0; i<bestcnt; i++) {
@@ -1178,7 +1209,7 @@ int Assemble(struct supertype *st, char *mddev,
                        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",
+                                       pr_err("Could not open %s for write - cannot Assemble array.\n",
                                                devices[j].devname);
                                        err = 1;
                                        break;
@@ -1187,11 +1218,14 @@ int Assemble(struct supertype *st, char *mddev,
                                fdlist[i] = -1;
                }
                if (!err) {
-                       err = Grow_restart(st, content, fdlist, bestcnt,
-                                          backup_file, verbose > 0);
+                       if (st->ss->external && st->ss->recover_backup)
+                               err = st->ss->recover_backup(st, content);
+                       else
+                               err = Grow_restart(st, content, fdlist, bestcnt,
+                                                  backup_file, verbose > 0);
                        if (err && invalid_backup) {
                                if (verbose > 0)
-                                       fprintf(stderr, Name ": continuing"
+                                       pr_err("continuing"
                                                " without restoring backup\n");
                                err = 0;
                        }
@@ -1201,9 +1235,9 @@ int Assemble(struct supertype *st, char *mddev,
                        if (fdlist[i]>=0) close(fdlist[i]);
                }
                if (err) {
-                       fprintf(stderr, Name ": Failed to restore critical section for reshape, sorry.\n");
+                       pr_err("Failed to restore critical section for reshape, sorry.\n");
                        if (backup_file == NULL)
-                               fprintf(stderr,"      Possibly you needed to specify the --backup-file\n");
+                               cont_err("Possibly you needed to specify the --backup-file\n");
                        close(mdfd);
                        free(devices);
                        return err;
@@ -1227,7 +1261,7 @@ int Assemble(struct supertype *st, char *mddev,
 
                rv = set_array_info(mdfd, st, content);
                if (rv) {
-                       fprintf(stderr, Name ": failed to set array info for %s: %s\n",
+                       pr_err("failed to set array info for %s: %s\n",
                                mddev, strerror(errno));
                        ioctl(mdfd, STOP_ARRAY, NULL);
                        close(mdfd);
@@ -1236,7 +1270,7 @@ int Assemble(struct supertype *st, char *mddev,
                }
                if (ident->bitmap_fd >= 0) {
                        if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) {
-                               fprintf(stderr, Name ": SET_BITMAP_FILE failed.\n");
+                               pr_err("SET_BITMAP_FILE failed.\n");
                                ioctl(mdfd, STOP_ARRAY, NULL);
                                close(mdfd);
                                free(devices);
@@ -1246,7 +1280,7 @@ int Assemble(struct supertype *st, char *mddev,
                        /* From config file */
                        int bmfd = open(ident->bitmap_file, O_RDWR);
                        if (bmfd < 0) {
-                               fprintf(stderr, Name ": Could not open bitmap file %s\n",
+                               pr_err("Could not open bitmap file %s\n",
                                        ident->bitmap_file);
                                ioctl(mdfd, STOP_ARRAY, NULL);
                                close(mdfd);
@@ -1254,7 +1288,7 @@ int Assemble(struct supertype *st, char *mddev,
                                return 1;
                        }
                        if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
-                               fprintf(stderr, Name ": Failed to set bitmapfile for %s\n", mddev);
+                               pr_err("Failed to set bitmapfile for %s\n", mddev);
                                close(bmfd);
                                ioctl(mdfd, STOP_ARRAY, NULL);
                                close(mdfd);
@@ -1284,30 +1318,31 @@ int Assemble(struct supertype *st, char *mddev,
                                rv = add_disk(mdfd, st, content, &devices[j].i);
 
                                if (rv) {
-                                       fprintf(stderr, Name ": failed to add "
-                                                       "%s to %s: %s\n",
-                                               devices[j].devname,
-                                               mddev,
-                                               strerror(errno));
+                                       pr_err("failed to add "
+                                              "%s to %s: %s\n",
+                                              devices[j].devname,
+                                              mddev,
+                                              strerror(errno));
                                        if (i < content->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);
+                                       pr_err("added %s to %s as %d%s\n",
+                                              devices[j].devname, mddev,
+                                              devices[j].i.disk.raid_disk,
+                                              devices[j].uptodate?"":
+                                              " (possibly out of date)");
                        } else if (verbose > 0 && i < content->array.raid_disks)
-                               fprintf(stderr, Name ": no uptodate device for "
+                               pr_err("no uptodate device for "
                                                "slot %d of %s\n",
                                        i, mddev);
                }
 
                if (content->array.level == LEVEL_CONTAINER) {
                        if (verbose >= 0) {
-                               fprintf(stderr, Name ": Container %s has been "
+                               pr_err("Container %s has been "
                                        "assembled with %d drive%s",
                                        mddev, okcnt+sparecnt, okcnt+sparecnt==1?"":"s");
                                if (okcnt < (unsigned)content->array.raid_disks)
@@ -1326,7 +1361,7 @@ int Assemble(struct supertype *st, char *mddev,
                if (runstop == 1 ||
                    (runstop <= 0 &&
                     ( enough(content->array.level, content->array.raid_disks,
-                             content->array.layout, clean, avail, okcnt) &&
+                             content->array.layout, clean, avail) &&
                       (okcnt + rebuilding_cnt >= req_cnt || start_partial_ok)
                             ))) {
                        /* This array is good-to-go.
@@ -1337,14 +1372,19 @@ int Assemble(struct supertype *st, char *mddev,
                        int rv;
 #ifndef MDASSEMBLE
                        if (content->reshape_active &&
-                           content->delta_disks <= 0)
-                               rv = Grow_continue(mdfd, st, content, backup_file);
-                       else
+                           content->delta_disks <= 0) {
+                               rv = sysfs_set_str(content, NULL,
+                                                  "array_state", "readonly");
+                               if (rv == 0)
+                                       rv = Grow_continue(mdfd, st, content,
+                                                          backup_file,
+                                                          freeze_reshape);
+                       } else
 #endif
                                rv = ioctl(mdfd, RUN_ARRAY, NULL);
                        if (rv == 0) {
                                if (verbose >= 0) {
-                                       fprintf(stderr, Name ": %s has been started with %d drive%s",
+                                       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);
@@ -1366,6 +1406,7 @@ int Assemble(struct supertype *st, char *mddev,
                                                        sysfs_set_num(sra, NULL,
                                                                      "stripe_cache_size",
                                                                      (4 * content->array.chunk_size / 4096) + 1);
+                                               sysfs_free(sra);
                                        }
                                }
                                if (okcnt < (unsigned)content->array.raid_disks) {
@@ -1377,7 +1418,7 @@ int Assemble(struct supertype *st, char *mddev,
                                         * might allow them to be included, or
                                         * they will become spares.
                                         */
-                                       for (i = 0; i <= bestcnt; i++) {
+                                       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))
@@ -1385,9 +1426,8 @@ int Assemble(struct supertype *st, char *mddev,
                                                        rv = add_disk(mdfd, st, content,
                                                                      &devices[j].i);
                                                        if (rv == 0 && verbose >= 0)
-                                                               fprintf(stderr,
-                                                                       Name ": %s has been re-added.\n",
-                                                                       devices[j].devname);
+                                                               pr_err("%s has been re-added.\n",
+                                                                      devices[j].devname);
                                                }
                                        }
                                }
@@ -1422,18 +1462,18 @@ int Assemble(struct supertype *st, char *mddev,
                                free(devices);
                                return 0;
                        }
-                       fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n",
+                       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, okcnt))
-                               fprintf(stderr, Name ": Not enough devices to "
+                                   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, okcnt))
-                               fprintf(stderr, Name ": Not enough devices to "
+                                        avail))
+                               pr_err("Not enough devices to "
                                        "start the array while not clean "
                                        "- consider --force.\n");
 
@@ -1444,8 +1484,8 @@ int Assemble(struct supertype *st, char *mddev,
                        return 1;
                }
                if (runstop == -1) {
-                       fprintf(stderr, Name ": %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 (okcnt != (unsigned)content->array.raid_disks)
                                fprintf(stderr, " (out of %d)", content->array.raid_disks);
                        fprintf(stderr, ", but not started.\n");
@@ -1454,18 +1494,18 @@ int Assemble(struct supertype *st, char *mddev,
                        return 0;
                }
                if (verbose >= -1) {
-                       fprintf(stderr, Name ": %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);
                        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, okcnt))
+                                   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, okcnt))
+                                        avail))
                                fprintf(stderr, " - not enough to start the "
                                        "array while not clean - consider "
                                        "--force.\n");
@@ -1491,7 +1531,7 @@ int Assemble(struct supertype *st, char *mddev,
                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",
+                   pr_err("Cannot start array: %s\n",
                            strerror(errno));
                }
 
@@ -1505,36 +1545,51 @@ int Assemble(struct supertype *st, char *mddev,
 int assemble_container_content(struct supertype *st, int mdfd,
                               struct mdinfo *content, int runstop,
                               char *chosen_name, int verbose,
-                              char *backup_file)
+                              char *backup_file, int freeze_reshape)
 {
        struct mdinfo *dev, *sra;
        int working = 0, preexist = 0;
        int expansion = 0;
        struct map_ent *map = NULL;
+       int old_raid_disks;
+       int start_reshape;
 
        sysfs_init(content, mdfd, 0);
 
        sra = sysfs_read(mdfd, 0, GET_VERSION);
        if (sra == NULL || strcmp(sra->text_version, content->text_version) != 0)
-               if (sysfs_set_array(content, md_get_version(mdfd)) != 0)
+               if (sysfs_set_array(content, md_get_version(mdfd)) != 0) {
+                       if (sra)
+                               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))));
 
-       if (content->reshape_active)
+       /* 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);
 
        if (sra)
                sysfs_free(sra);
-
+       old_raid_disks = content->array.raid_disks - content->delta_disks;
        for (dev = content->devs; dev; dev = dev->next)
                if (sysfs_add_disk(content, dev, 1) == 0) {
-                       if (dev->disk.raid_disk >= content->array.raid_disks &&
+                       if (dev->disk.raid_disk >= old_raid_disks &&
                            content->reshape_active)
                                expansion++;
                        else
                                working++;
                } else if (errno == EEXIST)
                        preexist++;
-       if (working == 0)
+       if (working + expansion == 0)
                return 1;/* Nothing new, don't try to start */
 
        map_update(&map, fd2devnum(mdfd),
@@ -1546,44 +1601,29 @@ int assemble_container_content(struct supertype *st, int mdfd,
                        content->array.working_disks) {
                int err;
 
-               if (content->reshape_active) {
+               if (start_reshape) {
                        int spare = content->array.raid_disks + expansion;
-                       int i;
-                       int *fdlist = malloc(sizeof(int) *
-                                            (working + expansion
-                                             + content->array.raid_disks));
-                       for (i=0; i<spare; i++)
-                               fdlist[i] = -1;
-                       for (dev = content->devs; dev; dev = dev->next) {
-                               char buf[20];
-                               int fd;
-                               sprintf(buf, "%d:%d",
-                                       dev->disk.major,
-                                       dev->disk.minor);
-                               fd = dev_open(buf, O_RDWR);
-
-                               if (dev->disk.raid_disk >= 0)
-                                       fdlist[dev->disk.raid_disk] = fd;
-                               else
-                                       fdlist[spare++] = fd;
-                       }
-                       err = Grow_restart(st, content, fdlist, spare,
-                                          backup_file, verbose > 0);
-                       while (spare > 0) {
-                               spare--;
-                               if (fdlist[spare] >= 0)
-                                       close(fdlist[spare]);
-                       }
-                       if (err) {
-                               fprintf(stderr, Name ": Failed to restore critical"
-                                       " section for reshape - sorry.\n");
-                               if (!backup_file)
-                                       fprintf(stderr, Name ":  Possibly you need"
-                                               " to specify a --backup-file\n");
+                       if (restore_backup(st, content,
+                                          working,
+                                          spare, backup_file, 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_dev))
+                                       start_mdmon(st->container_dev);
+                               ping_monitor_by_id(st->container_dev);
+                               if (mdmon_running(st->container_dev) &&
+                                               st->update_tail == NULL)
+                                       st->update_tail = &st->updates;
                        }
 
-                       err = Grow_continue(mdfd, st, content, backup_file);
+                       err = Grow_continue(mdfd, st, content, backup_file,
+                                           freeze_reshape);
                } else switch(content->array.level) {
                case LEVEL_LINEAR:
                case LEVEL_MULTIPATH:
@@ -1598,21 +1638,30 @@ int assemble_container_content(struct supertype *st, int mdfd,
                        if (!err) {
                                if (!mdmon_running(st->container_dev))
                                        start_mdmon(st->container_dev);
-                               ping_monitor(devnum2devname(st->container_dev));
+                               ping_monitor_by_id(st->container_dev);
                        }
                        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 (verbose >= 0) {
                        if (err)
-                               fprintf(stderr, Name
-                                       ": array %s now has %d devices",
-                                       chosen_name, working + preexist);
+                               pr_err("array %s now has %d device%s",
+                                      chosen_name, working + preexist,
+                                      working + preexist == 1 ? "":"s");
                        else
-                               fprintf(stderr, Name
-                                       ": Started %s with %d devices",
-                                       chosen_name, working + preexist);
+                               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)
@@ -1625,11 +1674,14 @@ int assemble_container_content(struct supertype *st, int mdfd,
                return err;
                /* FIXME should have an O_EXCL and wait for read-auto */
        } else {
-               if (verbose >= 0)
-                       fprintf(stderr, Name
-                               ": %s assembled with %d devices but "
-                               "not started\n",
-                               chosen_name, working);
+               if (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");
+               }
                return 1;
        }
 }