]> git.ipfire.org Git - thirdparty/mdadm.git/blobdiff - mdadm.c
Create parse_num() function.
[thirdparty/mdadm.git] / mdadm.c
diff --git a/mdadm.c b/mdadm.c
index e9813cf280152c3b6d739a213ffd6f45fa207e45..476756e50372f3551ff21d33b52f2201f16a45f6 100644 (file)
--- a/mdadm.c
+++ b/mdadm.c
@@ -1,7 +1,7 @@
 /*
  * mdadm - manage Linux "md" devices aka RAID arrays.
  *
- * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
+ * Copyright (C) 2001-2012 Neil Brown <neilb@suse.de>
  *
  *
  *    This program is free software; you can redistribute it and/or modify
 #include <ctype.h>
 
 
+static int scan_assemble(int autof, struct supertype *ss,
+                        int readonly, int runstop,
+                        struct mddev_ident *ident,
+                        char *homehost, int require_homehost,
+                        int verbose, int force,
+                        int freeze_reshape);
+static int misc_scan(char devmode, int verbose, int export, int test,
+                    char *homehost, char *prefer);
+static int stop_scan(int quiet);
+static int misc_list(struct mddev_dev *devlist,
+                    int brief, int verbose, int export, int test,
+                    char *homehost, char *prefer, char *subarray,
+                    char *update, struct mddev_ident *ident,
+                    struct supertype *ss, int force, int quiet);
+
+
 int main(int argc, char *argv[])
 {
        int mode = 0;
        int opt;
        int option_index;
-       char *c;
        int rv;
        int i;
 
@@ -46,20 +61,19 @@ int main(int argc, char *argv[])
        int layout = UnSet;
        char *layout_str = NULL;
        int raiddisks = 0;
-       int max_disks = MD_SB_DISKS; /* just a default */
        int sparedisks = 0;
        struct mddev_ident ident;
        char *configfile = NULL;
-       char *cp;
        char *update = NULL;
        int scan = 0;
-       char devmode = 0;
+       int devmode = 0;
        int runstop = 0;
        int readonly = 0;
        int write_behind = 0;
        int bitmap_fd = -1;
        char *bitmap_file = NULL;
        char *backup_file = NULL;
+       int invalid_backup = 0;
        int bitmap_chunk = UnSet;
        int SparcAdjust = 0;
        struct mddev_dev *devlist = NULL;
@@ -73,7 +87,9 @@ int main(int argc, char *argv[])
        int test = 0;
        int export = 0;
        int assume_clean = 0;
+       char *prefer = NULL;
        char *symlinks = NULL;
+       int grow_continue = 0;
        /* autof indicates whether and how to create device node.
         * bottom 3 bits are style.  Rest (when shifted) are number of parts
         * 0  - unset
@@ -99,19 +115,20 @@ int main(int argc, char *argv[])
        int spare_sharing = 1;
        struct supertype *ss = NULL;
        int writemostly = 0;
-       int re_add = 0;
        char *shortopt = short_options;
        int dosyslog = 0;
        int rebuild_map = 0;
-       int auto_update_home = 0;
        char *subarray = NULL;
        char *remove_path = NULL;
+       char *udev_filename = NULL;
 
        int print_help = 0;
        FILE *outf;
 
        int mdfd = -1;
 
+       int freeze_reshape = 0;
+
        srandom(time(0) ^ getpid());
 
        ident.uuid_set=0;
@@ -135,12 +152,11 @@ int main(int argc, char *argv[])
                int newmode = mode;
                /* firstly, some mode-independent options */
                switch(opt) {
+               case HelpOptions:
+                       print_help = 2;
+                       continue;
                case 'h':
-                       if (option_index > 0 &&
-                           strcmp(long_options[option_index].name, "help-options")==0)
-                               print_help = 2;
-                       else
-                               print_help = 1;
+                       print_help = 1;
                        continue;
 
                case 'V':
@@ -154,9 +170,11 @@ int main(int argc, char *argv[])
                        continue;
 
                case 'b':
-                       if (mode == ASSEMBLE || mode == BUILD || mode == CREATE || mode == GROW ||
-                           mode == INCREMENTAL || mode == MANAGE)
+                       if (mode == ASSEMBLE || mode == BUILD || mode == CREATE
+                           || mode == GROW || mode == INCREMENTAL
+                           || mode == MANAGE)
                                break; /* b means bitmap */
+               case Brief:
                        brief = 1;
                        continue;
 
@@ -170,6 +188,23 @@ int main(int argc, char *argv[])
                                homehost = optarg;
                        continue;
 
+               /*
+                * --offroot sets first char of argv[0] to @. This is used
+                * by systemd to signal that the task was launched from
+                * initrd/initramfs and should be preserved during shutdown
+                */
+               case OffRootOpt:
+                       argv[0][0] = '@';
+                       __offroot = 1;
+                       continue;
+
+               case Prefer:
+                       if (prefer)
+                               free(prefer);
+                       if (asprintf(&prefer, "/%s/", optarg) <= 0)
+                               prefer = NULL;
+                       continue;
+
                case ':':
                case '?':
                        fputs(Usage, stderr);
@@ -181,13 +216,16 @@ int main(int argc, char *argv[])
                 */
 
                switch(opt) {
-               case '@': /* just incase they say --manage */
+               case ManageOpt:
                        newmode = MANAGE;
                        shortopt = short_bitmap_options;
                        break;
                case 'a':
+               case Add:
                case 'r':
+               case Remove:
                case 'f':
+               case Fail:
                case ReAdd: /* re-add */
                        if (!mode) {
                                newmode = MANAGE;
@@ -195,47 +233,60 @@ int main(int argc, char *argv[])
                        }
                        break;
 
-               case 'A': newmode = ASSEMBLE; shortopt = short_bitmap_auto_options; break;
-               case 'B': newmode = BUILD; shortopt = short_bitmap_auto_options; break;
-               case 'C': newmode = CREATE; shortopt = short_bitmap_auto_options; break;
-               case 'F': newmode = MONITOR;break;
+               case 'A': newmode = ASSEMBLE;
+                       shortopt = short_bitmap_auto_options;
+                       break;
+               case 'B': newmode = BUILD;
+                       shortopt = short_bitmap_auto_options;
+                       break;
+               case 'C': newmode = CREATE;
+                       shortopt = short_bitmap_auto_options;
+                       break;
+               case 'F': newmode = MONITOR;
+                       break;
                case 'G': newmode = GROW;
                        shortopt = short_bitmap_options;
                        break;
                case 'I': newmode = INCREMENTAL;
-                       shortopt = short_bitmap_auto_options; break;
+                       shortopt = short_bitmap_auto_options;
+                       break;
                case AutoDetect:
-                       newmode = AUTODETECT; break;
+                       newmode = AUTODETECT;
+                       break;
 
-               case '#':
+               case MiscOpt:
                case 'D':
                case 'E':
                case 'X':
-               case 'Q': newmode = MISC; break;
+               case 'Q':
+                       newmode = MISC;
+                       break;
+
                case 'R':
                case 'S':
                case 'o':
                case 'w':
                case 'W':
+               case WaitOpt:
                case Waitclean:
                case DetailPlatform:
                case KillSubarray:
                case UpdateSubarray:
-                       if (opt == KillSubarray || opt == UpdateSubarray) {
-                               if (subarray) {
-                                       fprintf(stderr, Name ": subarray can only be specified once\n");
-                                       exit(2);
-                               }
-                               subarray = optarg;
-                       }
-               case 'K': if (!mode) newmode = MISC; break;
-               case NoSharing: newmode = MONITOR; break;
+               case UdevRules:
+               case KillOpt:
+                       if (!mode)
+                               newmode = MISC;
+                       break;
+
+               case NoSharing:
+                       newmode = MONITOR;
+                       break;
                }
                if (mode && newmode == mode) {
                        /* everybody happy ! */
                } else if (mode && newmode != mode) {
                        /* not allowed.. */
-                       fprintf(stderr, Name ": ");
+                       pr_err("");
                        if (option_index >= 0)
                                fprintf(stderr, "--%s", long_options[option_index].name);
                        else
@@ -246,9 +297,15 @@ int main(int argc, char *argv[])
                        exit(2);
                } else if (!mode && newmode) {
                        mode = newmode;
+                       if (mode == MISC && devs_found) {
+                               pr_err("No action given for %s in --misc mode\n",
+                                       devlist->devname);
+                               fprintf(stderr,"       Action options must come before device names\n");
+                               exit(2);
+                       }
                } else {
                        /* special case of -c --help */
-                       if (opt == 'c' &&
+                       if ((opt == 'c' || opt == ConfigFile) &&
                            ( strncmp(optarg, "--h", 3)==0 ||
                              strncmp(optarg, "-h", 2)==0)) {
                                fputs(Help_config, stdout);
@@ -258,15 +315,10 @@ int main(int argc, char *argv[])
                        /* If first option is a device, don't force the mode yet */
                        if (opt == 1) {
                                if (devs_found == 0) {
-                                       dv = malloc(sizeof(*dv));
-                                       if (dv == NULL) {
-                                               fprintf(stderr, Name ": malloc failed\n");
-                                               exit(3);
-                                       }
+                                       dv = xmalloc(sizeof(*dv));
                                        dv->devname = optarg;
                                        dv->disposition = devmode;
                                        dv->writemostly = writemostly;
-                                       dv->re_add = re_add;
                                        dv->used = 0;
                                        dv->next = NULL;
                                        *devlistend = dv;
@@ -276,22 +328,22 @@ int main(int argc, char *argv[])
                                        continue;
                                }
                                /* No mode yet, and this is the second device ... */
-                               fprintf(stderr, Name ": An option must be given to set the mode before a second device\n"
+                               pr_err("An option must be given to set the mode before a second device\n"
                                        "       (%s) is listed\n", optarg);
                                exit(2);
                        }
                        if (option_index >= 0)
-                               fprintf(stderr, Name ": --%s", long_options[option_index].name);
+                               pr_err("--%s", long_options[option_index].name);
                        else
-                               fprintf(stderr, Name ": -%c", opt);
+                               pr_err("-%c", opt);
                        fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
                        exit(2);
                }
 
                /* if we just set the mode, then done */
                switch(opt) {
-               case '@':
-               case '#':
+               case ManageOpt:
+               case MiscOpt:
                case 'A':
                case 'B':
                case 'C':
@@ -304,23 +356,20 @@ int main(int argc, char *argv[])
                if (opt == 1) {
                        /* an undecorated option - must be a device name.
                         */
-                       if (devs_found > 0 && mode == '@' && !devmode) {
-                               fprintf(stderr, Name ": Must give one of -a/-r/-f for subsequent devices at %s\n", optarg);
+                       if (devs_found > 0 && mode == MANAGE && !devmode) {
+                               pr_err("Must give one of -a/-r/-f"
+                                       " for subsequent devices at %s\n", optarg);
                                exit(2);
                        }
-                       if (devs_found > 0 && mode == 'G' && !devmode) {
-                               fprintf(stderr, Name ": Must give one of -a for devices do add: %s\n", optarg);
+                       if (devs_found > 0 && mode == GROW && !devmode) {
+                               pr_err("Must give -a/--add for"
+                                      " devices to add: %s\n", optarg);
                                exit(2);
                        }
-                       dv = malloc(sizeof(*dv));
-                       if (dv == NULL) {
-                               fprintf(stderr, Name ": malloc failed\n");
-                               exit(3);
-                       }
+                       dv = xmalloc(sizeof(*dv));
                        dv->devname = optarg;
                        dv->disposition = devmode;
                        dv->writemostly = writemostly;
-                       dv->re_add = re_add;
                        dv->used = 0;
                        dv->next = NULL;
                        *devlistend = dv;
@@ -332,50 +381,52 @@ int main(int argc, char *argv[])
 
                /* We've got a mode, and opt is now something else which
                 * could depend on the mode */
-#define O(a,b) ((a<<8)|b)
+#define O(a,b) ((a<<16)|b)
                switch (O(mode,opt)) {
                case O(GROW,'c'):
+               case O(GROW,ChunkSize):
                case O(CREATE,'c'):
+               case O(CREATE,ChunkSize):
                case O(BUILD,'c'): /* chunk or rounding */
+               case O(BUILD,ChunkSize): /* chunk or rounding */
                        if (chunk) {
-                               fprintf(stderr, Name ": chunk/rounding may only be specified once. "
+                               pr_err("chunk/rounding may only be specified once. "
                                        "Second value is %s.\n", optarg);
                                exit(2);
                        }
-                       chunk = strtol(optarg, &c, 10);
-                       if (!optarg[0] || *c || chunk<4 || ((chunk-1)&chunk)) {
-                               fprintf(stderr, Name ": invalid chunk/rounding value: %s\n",
+                       chunk = parse_size(optarg);
+                       if (chunk < 8 || (chunk&1)) {
+                               pr_err("invalid chunk/rounding value: %s\n",
                                        optarg);
                                exit(2);
                        }
+                       /* Convert sectors to K */
+                       chunk /= 2;
                        continue;
 
-#if 0
-               case O(ASSEMBLE,AutoHomeHost):
-                       auto_update_home = 1;
-                       continue;
-#endif
                case O(INCREMENTAL, 'e'):
                case O(CREATE,'e'):
                case O(ASSEMBLE,'e'):
                case O(MISC,'e'): /* set metadata (superblock) information */
                        if (ss) {
-                               fprintf(stderr, Name ": metadata information already given\n");
+                               pr_err("metadata information already given\n");
                                exit(2);
                        }
                        for(i=0; !ss && superlist[i]; i++)
                                ss = superlist[i]->match_metadata_desc(optarg);
 
                        if (!ss) {
-                               fprintf(stderr, Name ": unrecognised metadata identifier: %s\n", optarg);
+                               pr_err("unrecognised metadata identifier: %s\n", optarg);
                                exit(2);
                        }
-                       max_disks = ss->max_devs;
                        continue;
 
                case O(MANAGE,'W'):
+               case O(MANAGE,WriteMostly):
                case O(BUILD,'W'):
+               case O(BUILD,WriteMostly):
                case O(CREATE,'W'):
+               case O(CREATE,WriteMostly):
                        /* set write-mostly for following devices */
                        writemostly = 1;
                        continue;
@@ -390,7 +441,7 @@ int main(int argc, char *argv[])
                case O(CREATE,'z'):
                case O(BUILD,'z'): /* size */
                        if (size >= 0) {
-                               fprintf(stderr, Name ": size may only be specified once. "
+                               pr_err("size may only be specified once. "
                                        "Second value is %s.\n", optarg);
                                exit(2);
                        }
@@ -399,7 +450,7 @@ int main(int argc, char *argv[])
                        else {
                                size = parse_size(optarg);
                                if (size < 8) {
-                                       fprintf(stderr, Name ": invalid size: %s\n",
+                                       pr_err("invalid size: %s\n",
                                                optarg);
                                        exit(2);
                                }
@@ -410,7 +461,7 @@ int main(int argc, char *argv[])
 
                case O(GROW,'Z'): /* array size */
                        if (array_size >= 0) {
-                               fprintf(stderr, Name ": array-size may only be specified once. "
+                               pr_err("array-size may only be specified once. "
                                        "Second value is %s.\n", optarg);
                                exit(2);
                        }
@@ -419,7 +470,7 @@ int main(int argc, char *argv[])
                        else {
                                array_size = parse_size(optarg);
                                if (array_size <= 0) {
-                                       fprintf(stderr, Name ": invalid array size: %s\n",
+                                       pr_err("invalid array size: %s\n",
                                                optarg);
                                        exit(2);
                                }
@@ -430,13 +481,13 @@ int main(int argc, char *argv[])
                case O(CREATE,'l'):
                case O(BUILD,'l'): /* set raid level*/
                        if (level != UnSet) {
-                               fprintf(stderr, Name ": raid level may only be set once.  "
+                               pr_err("raid level may only be set once.  "
                                        "Second value is %s.\n", optarg);
                                exit(2);
                        }
                        level = map_name(pers, optarg);
                        if (level == UnSet) {
-                               fprintf(stderr, Name ": invalid raid level: %s\n",
+                               pr_err("invalid raid level: %s\n",
                                        optarg);
                                exit(2);
                        }
@@ -444,12 +495,12 @@ int main(int argc, char *argv[])
                            level != LEVEL_MULTIPATH && level != LEVEL_FAULTY &&
                            level != 10 &&
                            mode == BUILD) {
-                               fprintf(stderr, Name ": Raid level %s not permitted with --build.\n",
+                               pr_err("Raid level %s not permitted with --build.\n",
                                        optarg);
                                exit(2);
                        }
                        if (sparedisks > 0 && level < 1 && level >= -1) {
-                               fprintf(stderr, Name ": raid level %s is incompatible with spare-devices setting.\n",
+                               pr_err("raid level %s is incompatible with spare-devices setting.\n",
                                        optarg);
                                exit(2);
                        }
@@ -457,9 +508,10 @@ int main(int argc, char *argv[])
                        continue;
 
                case O(GROW, 'p'): /* new layout */
+               case O(GROW, Layout):
                        if (layout_str) {
-                               fprintf(stderr,Name ": layout may only be sent once.  "
-                                       "Second value was %s\n", optarg);
+                               pr_err("layout may only be sent once.  "
+                                      "Second value was %s\n", optarg);
                                exit(2);
                        }
                        layout_str = optarg;
@@ -467,25 +519,27 @@ int main(int argc, char *argv[])
                        continue;
 
                case O(CREATE,'p'): /* raid5 layout */
+               case O(CREATE,Layout):
                case O(BUILD,'p'): /* faulty layout */
+               case O(BUILD,Layout):
                        if (layout != UnSet) {
-                               fprintf(stderr,Name ": layout may only be sent once.  "
-                                       "Second value was %s\n", optarg);
+                               pr_err("layout may only be sent once.  "
+                                      "Second value was %s\n", optarg);
                                exit(2);
                        }
                        switch(level) {
                        default:
-                               fprintf(stderr, Name ": layout not meaningful for %s arrays.\n",
+                               pr_err("layout not meaningful for %s arrays.\n",
                                        map_num(pers, level));
                                exit(2);
                        case UnSet:
-                               fprintf(stderr, Name ": raid level must be given before layout.\n");
+                               pr_err("raid level must be given before layout.\n");
                                exit(2);
 
                        case 5:
                                layout = map_name(r5layout, optarg);
                                if (layout==UnSet) {
-                                       fprintf(stderr, Name ": layout %s not understood for raid5.\n",
+                                       pr_err("layout %s not understood for raid5.\n",
                                                optarg);
                                        exit(2);
                                }
@@ -493,7 +547,7 @@ int main(int argc, char *argv[])
                        case 6:
                                layout = map_name(r6layout, optarg);
                                if (layout==UnSet) {
-                                       fprintf(stderr, Name ": layout %s not understood for raid6.\n",
+                                       pr_err("layout %s not understood for raid6.\n",
                                                optarg);
                                        exit(2);
                                }
@@ -502,7 +556,7 @@ int main(int argc, char *argv[])
                        case 10:
                                layout = parse_layout_10(optarg);
                                if (layout < 0) {
-                                       fprintf(stderr, Name ": layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
+                                       pr_err("layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
                                        exit(2);
                                }
                                break;
@@ -512,7 +566,7 @@ int main(int argc, char *argv[])
                                 */
                                layout = parse_layout_faulty(optarg);
                                if (layout == -1) {
-                                       fprintf(stderr, Name ": layout %s not understood for faulty.\n",
+                                       pr_err("layout %s not understood for faulty.\n",
                                                optarg);
                                        exit(2);
                                }
@@ -522,6 +576,7 @@ int main(int argc, char *argv[])
 
                case O(CREATE,AssumeClean):
                case O(BUILD,AssumeClean): /* assume clean */
+               case O(GROW,AssumeClean):
                        assume_clean = 1;
                        continue;
 
@@ -529,42 +584,46 @@ int main(int argc, char *argv[])
                case O(CREATE,'n'):
                case O(BUILD,'n'): /* number of raid disks */
                        if (raiddisks) {
-                               fprintf(stderr, Name ": raid-devices set twice: %d and %s\n",
+                               pr_err("raid-devices set twice: %d and %s\n",
                                        raiddisks, optarg);
                                exit(2);
                        }
-                       raiddisks = strtol(optarg, &c, 10);
-                       if (!optarg[0] || *c || raiddisks<=0) {
-                               fprintf(stderr, Name ": invalid number of raid devices: %s\n",
+                       raiddisks = parse_num(optarg);
+                       if (raiddisks <= 0) {
+                               pr_err("invalid number of raid devices: %s\n",
                                        optarg);
                                exit(2);
                        }
                        ident.raid_disks = raiddisks;
                        continue;
 
-               case O(CREATE,'x'): /* number of spare (eXtra) discs */
+               case O(CREATE,'x'): /* number of spare (eXtra) disks */
                        if (sparedisks) {
-                               fprintf(stderr,Name ": spare-devices set twice: %d and %s\n",
-                                       sparedisks, optarg);
+                               pr_err("spare-devices set twice: %d and %s\n",
+                                      sparedisks, optarg);
                                exit(2);
                        }
                        if (level != UnSet && level <= 0 && level >= -1) {
-                               fprintf(stderr, Name ": spare-devices setting is incompatible with raid level %d\n",
+                               pr_err("spare-devices setting is incompatible with raid level %d\n",
                                        level);
                                exit(2);
                        }
-                       sparedisks = strtol(optarg, &c, 10);
-                       if (!optarg[0] || *c || sparedisks < 0) {
-                               fprintf(stderr, Name ": invalid number of spare-devices: %s\n",
+                       sparedisks = parse_num(optarg);
+                       if (sparedisks < 0) {
+                               pr_err("invalid number of spare-devices: %s\n",
                                        optarg);
                                exit(2);
                        }
                        continue;
 
                case O(CREATE,'a'):
+               case O(CREATE,Auto):
                case O(BUILD,'a'):
+               case O(BUILD,Auto):
                case O(INCREMENTAL,'a'):
-               case O(ASSEMBLE,'a'): /* auto-creation of device node */
+               case O(INCREMENTAL,Auto):
+               case O(ASSEMBLE,'a'):
+               case O(ASSEMBLE,Auto): /* auto-creation of device node */
                        autof = parse_auto(optarg, "--auto flag", 0);
                        continue;
 
@@ -575,25 +634,35 @@ int main(int argc, char *argv[])
                        continue;
 
                case O(BUILD,'f'): /* force honouring '-n 1' */
+               case O(BUILD,Force): /* force honouring '-n 1' */
                case O(GROW,'f'): /* ditto */
+               case O(GROW,Force): /* ditto */
                case O(CREATE,'f'): /* force honouring of device list */
+               case O(CREATE,Force): /* force honouring of device list */
                case O(ASSEMBLE,'f'): /* force assembly */
+               case O(ASSEMBLE,Force): /* force assembly */
                case O(MISC,'f'): /* force zero */
+               case O(MISC,Force): /* force zero */
+               case O(MANAGE,Force): /* add device which is too large */
                        force=1;
                        continue;
-
                        /* now for the Assemble options */
+               case O(ASSEMBLE, FreezeReshape):   /* Freeze reshape during
+                                                   * initrd phase */
+               case O(INCREMENTAL, FreezeReshape):
+                       freeze_reshape = 1;
+                       continue;
                case O(CREATE,'u'): /* uuid of array */
                case O(ASSEMBLE,'u'): /* uuid of array */
                        if (ident.uuid_set) {
-                               fprintf(stderr, Name ": uuid cannot be set twice.  "
+                               pr_err("uuid cannot be set twice.  "
                                        "Second value %s.\n", optarg);
                                exit(2);
                        }
                        if (parse_uuid(optarg, ident.uuid))
                                ident.uuid_set = 1;
                        else {
-                               fprintf(stderr,Name ": Bad uuid: %s\n", optarg);
+                               pr_err("Bad uuid: %s\n", optarg);
                                exit(2);
                        }
                        continue;
@@ -602,16 +671,16 @@ int main(int argc, char *argv[])
                case O(ASSEMBLE,'N'):
                case O(MISC,'N'):
                        if (ident.name[0]) {
-                               fprintf(stderr, Name ": name cannot be set twice.   "
+                               pr_err("name cannot be set twice.   "
                                        "Second value %s.\n", optarg);
                                exit(2);
                        }
                        if (mode == MISC && !subarray) {
-                               fprintf(stderr, Name ": -N/--name only valid with --update-subarray in misc mode\n");
+                               pr_err("-N/--name only valid with --update-subarray in misc mode\n");
                                exit(2);
                        }
                        if (strlen(optarg) > 32) {
-                               fprintf(stderr, Name ": name '%s' is too long, 32 chars max.\n",
+                               pr_err("name '%s' is too long, 32 chars max.\n",
                                        optarg);
                                exit(2);
                        }
@@ -619,31 +688,40 @@ int main(int argc, char *argv[])
                        continue;
 
                case O(ASSEMBLE,'m'): /* super-minor for array */
+               case O(ASSEMBLE,SuperMinor):
                        if (ident.super_minor != UnSet) {
-                               fprintf(stderr, Name ": super-minor cannot be set twice.  "
+                               pr_err("super-minor cannot be set twice.  "
                                        "Second value: %s.\n", optarg);
                                exit(2);
                        }
                        if (strcmp(optarg, "dev")==0)
                                ident.super_minor = -2;
                        else {
-                               ident.super_minor = strtoul(optarg, &cp, 10);
-                               if (!optarg[0] || *cp) {
-                                       fprintf(stderr, Name ": Bad super-minor number: %s.\n", optarg);
+                               ident.super_minor = parse_num(optarg);
+                               if (ident.super_minor < 0) {
+                                       pr_err("Bad super-minor number: %s.\n", optarg);
                                        exit(2);
                                }
                        }
                        continue;
 
+               case O(ASSEMBLE,'o'):
+               case O(MANAGE,'o'):
+               case O(CREATE,'o'):
+                       readonly = 1;
+                       continue;
+
                case O(ASSEMBLE,'U'): /* update the superblock */
                case O(MISC,'U'):
                        if (update) {
-                               fprintf(stderr, Name ": Can only update one aspect of superblock, both %s and %s given.\n",
+                               pr_err("Can only update one aspect"
+                                       " of superblock, both %s and %s given.\n",
                                        update, optarg);
                                exit(2);
                        }
                        if (mode == MISC && !subarray) {
-                               fprintf(stderr, Name ": Only subarrays can be updated in misc mode\n");
+                               pr_err("Only subarrays can be"
+                                       " updated in misc mode\n");
                                exit(2);
                        }
                        update = optarg;
@@ -663,15 +741,20 @@ int main(int argc, char *argv[])
                                continue;
                        if (strcmp(update, "devicesize")==0)
                                continue;
+                       if (strcmp(update, "no-bitmap")==0)
+                               continue;
                        if (strcmp(update, "byteorder")==0) {
                                if (ss) {
-                                       fprintf(stderr, Name ": must not set metadata type with --update=byteorder.\n");
+                                       pr_err("must not set metadata"
+                                              " type with --update=byteorder.\n");
                                        exit(2);
                                }
                                for(i=0; !ss && superlist[i]; i++)
-                                       ss = superlist[i]->match_metadata_desc("0.swap");
+                                       ss = superlist[i]->match_metadata_desc(
+                                               "0.swap");
                                if (!ss) {
-                                       fprintf(stderr, Name ": INTERNAL ERROR cannot find 0.swap\n");
+                                       pr_err("INTERNAL ERROR"
+                                               " cannot find 0.swap\n");
                                        exit(2);
                                }
 
@@ -689,22 +772,48 @@ int main(int argc, char *argv[])
                        }
                        fprintf(outf, "Valid --update options are:\n"
                "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
-               "     'summaries', 'homehost', 'byteorder', 'devicesize'.\n");
+               "     'summaries', 'homehost', 'byteorder', 'devicesize',\n"
+               "     'no-bitmap'\n");
                        exit(outf == stdout ? 0 : 2);
 
+               case O(MANAGE,'U'):
+                       /* update=devicesize is allowed with --re-add */
+                       if (devmode != 'A') {
+                               pr_err("--update in Manage mode only"
+                                       " allowed with --re-add.\n");
+                               exit(1);
+                       }
+                       if (update) {
+                               pr_err("Can only update one aspect"
+                                       " of superblock, both %s and %s given.\n",
+                                       update, optarg);
+                               exit(2);
+                       }
+                       update = optarg;
+                       if (strcmp(update, "devicesize") != 0) {
+                               pr_err("only 'devicesize' can be"
+                                       " updated with --re-add\n");
+                               exit(2);
+                       }
+                       continue;
+
                case O(INCREMENTAL,NoDegraded):
-                       fprintf(stderr, Name ": --no-degraded is deprecated in Incremental mode\n");
+                       pr_err("--no-degraded is deprecated in Incremental mode\n");
                case O(ASSEMBLE,NoDegraded): /* --no-degraded */
                        runstop = -1; /* --stop isn't allowed for --assemble,
                                       * so we overload slightly */
                        continue;
 
-               case O(ASSEMBLE,'c'): /* config file */
+               case O(ASSEMBLE,'c'):
+               case O(ASSEMBLE,ConfigFile):
                case O(INCREMENTAL, 'c'):
+               case O(INCREMENTAL, ConfigFile):
                case O(MISC, 'c'):
+               case O(MISC, ConfigFile):
                case O(MONITOR,'c'):
+               case O(MONITOR,ConfigFile):
                        if (configfile) {
-                               fprintf(stderr, Name ": configfile cannot be set twice.  "
+                               pr_err("configfile cannot be set twice.  "
                                        "Second value is %s.\n", optarg);
                                exit(2);
                        }
@@ -720,25 +829,28 @@ int main(int argc, char *argv[])
                        continue;
 
                case O(MONITOR,'m'): /* mail address */
+               case O(MONITOR,EMail):
                        if (mailaddr)
-                               fprintf(stderr, Name ": only specify one mailaddress. %s ignored.\n",
+                               pr_err("only specify one mailaddress. %s ignored.\n",
                                        optarg);
                        else
                                mailaddr = optarg;
                        continue;
 
                case O(MONITOR,'p'): /* alert program */
+               case O(MONITOR,ProgramOpt): /* alert program */
                        if (program)
-                               fprintf(stderr, Name ": only specify one alter program. %s ignored.\n",
+                               pr_err("only specify one alter program. %s ignored.\n",
                                        optarg);
                        else
                                program = optarg;
                        continue;
 
                case O(MONITOR,'r'): /* rebuild increments */
+               case O(MONITOR,Increment):
                        increments = atoi(optarg);
-                       if (increments>99 || increments<1) {
-                               fprintf(stderr, Name ": please specify positive integer between 1 and 99 as rebuild increments.\n");
+                       if (increments > 99 || increments < 1) {
+                               pr_err("please specify positive integer between 1 and 99 as rebuild increments.\n");
                                exit(2);
                        }
                        continue;
@@ -748,29 +860,31 @@ int main(int argc, char *argv[])
                case O(BUILD,'d'): /* delay for bitmap updates */
                case O(CREATE,'d'):
                        if (delay)
-                               fprintf(stderr, Name ": only specify delay once. %s ignored.\n",
+                               pr_err("only specify delay once. %s ignored.\n",
                                        optarg);
                        else {
-                               delay = strtol(optarg, &c, 10);
-                               if (!optarg[0] || *c || delay<1) {
-                                       fprintf(stderr, Name ": invalid delay: %s\n",
+                               delay = parse_num(optarg);
+                               if (delay<1) {
+                                       pr_err("invalid delay: %s\n",
                                                optarg);
                                        exit(2);
                                }
                        }
                        continue;
                case O(MONITOR,'f'): /* daemonise */
+               case O(MONITOR,Fork):
                        daemonise = 1;
                        continue;
                case O(MONITOR,'i'): /* pid */
                        if (pidfile)
-                               fprintf(stderr, Name ": only specify one pid file. %s ignored.\n",
+                               pr_err("only specify one pid file. %s ignored.\n",
                                        optarg);
                        else
                                pidfile = optarg;
                        continue;
                case O(MONITOR,'1'): /* oneshot */
                        oneshot = 1;
+                       spare_sharing = 0;
                        continue;
                case O(MONITOR,'t'): /* test */
                        test = 1;
@@ -782,25 +896,30 @@ int main(int argc, char *argv[])
                case O(MONITOR, NoSharing):
                        spare_sharing = 0;
                        continue;
+
                        /* now the general management options.  Some are applicable
                         * to other modes. None have arguments.
                         */
                case O(GROW,'a'):
-               case O(MANAGE,'a'): /* add a drive */
+               case O(GROW,Add):
+               case O(MANAGE,'a'):
+               case O(MANAGE,Add): /* add a drive */
                        devmode = 'a';
-                       re_add = 0;
                        continue;
                case O(MANAGE,ReAdd):
-                       devmode = 'a';
-                       re_add = 1;
+                       devmode = 'A';
                        continue;
                case O(MANAGE,'r'): /* remove a drive */
+               case O(MANAGE,Remove):
                        devmode = 'r';
                        continue;
                case O(MANAGE,'f'): /* set faulty */
-               case O(INCREMENTAL,'f'): /* r for incremental is taken, use f
-                                         * even though we will both fail and
-                                         * remove the device */
+               case O(MANAGE,Fail):
+               case O(INCREMENTAL,'f'):
+               case O(INCREMENTAL,Remove):
+               case O(INCREMENTAL,Fail): /* r for incremental is taken, use f
+                                          * even though we will both fail and
+                                          * remove the device */
                        devmode = 'f';
                        continue;
                case O(INCREMENTAL,'R'):
@@ -809,14 +928,14 @@ int main(int argc, char *argv[])
                case O(BUILD,'R'):
                case O(CREATE,'R'): /* Run the array */
                        if (runstop < 0) {
-                               fprintf(stderr, Name ": Cannot both Stop and Run an array\n");
+                               pr_err("Cannot both Stop and Run an array\n");
                                exit(2);
                        }
                        runstop = 1;
                        continue;
                case O(MANAGE,'S'):
                        if (runstop > 0) {
-                               fprintf(stderr, Name ": Cannot both Run and Stop an array\n");
+                               pr_err("Cannot both Run and Stop an array\n");
                                exit(2);
                        }
                        runstop = -1;
@@ -828,20 +947,29 @@ int main(int argc, char *argv[])
                case O(MISC,'Q'):
                case O(MISC,'D'):
                case O(MISC,'E'):
-               case O(MISC,'K'):
+               case O(MISC,KillOpt):
                case O(MISC,'R'):
                case O(MISC,'S'):
                case O(MISC,'X'):
                case O(MISC,'o'):
                case O(MISC,'w'):
                case O(MISC,'W'):
+               case O(MISC, WaitOpt):
                case O(MISC, Waitclean):
                case O(MISC, DetailPlatform):
                case O(MISC, KillSubarray):
                case O(MISC, UpdateSubarray):
+                       if (opt == KillSubarray || opt == UpdateSubarray) {
+                               if (subarray) {
+                                       pr_err("subarray can only"
+                                               " be specified once\n");
+                                       exit(2);
+                               }
+                               subarray = optarg;
+                       }
                        if (devmode && devmode != opt &&
                            (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
-                               fprintf(stderr, Name ": --examine/-E cannot be given with ");
+                               pr_err("--examine/-E cannot be given with ");
                                if (devmode == 'E') {
                                        if (option_index >= 0)
                                                fprintf(stderr, "--%s\n",
@@ -856,30 +984,45 @@ int main(int argc, char *argv[])
                        }
                        devmode = opt;
                        continue;
+               case O(MISC, UdevRules):
+                       if (devmode && devmode != opt) {
+                               pr_err("--udev-rules must"
+                                      " be the only option.\n");
+                       } else {
+                               if (udev_filename)
+                                       pr_err("only specify one udev "
+                                               "rule filename. %s ignored.\n",
+                                               optarg);
+                               else
+                                       udev_filename = optarg;
+                       }
+                       devmode = opt;
+                       continue;
                case O(MISC,'t'):
                        test = 1;
                        continue;
 
                case O(MISC, Sparc22):
                        if (devmode != 'E') {
-                               fprintf(stderr, Name ": --sparc2.2 only allowed with --examine\n");
+                               pr_err("--sparc2.2 only allowed with --examine\n");
                                exit(2);
                        }
                        SparcAdjust = 1;
                        continue;
 
                case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
+               case O(ASSEMBLE,Bitmap):
                        if (!optarg) {
-                               fprintf(stderr, Name ": bitmap file needed with -b in --assemble mode\n");
+                               pr_err("bitmap file needed with -b in --assemble mode\n");
                                exit(2);
                        }
                        if (strcmp(optarg, "internal")==0) {
-                               fprintf(stderr, Name ": there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
+                               pr_err("there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
                                continue;
                        }
                        bitmap_fd = open(optarg, O_RDWR);
                        if (!*optarg || bitmap_fd < 0) {
-                               fprintf(stderr, Name ": cannot open bitmap file %s: %s\n", optarg, strerror(errno));
+                               pr_err("cannot open bitmap file %s: %s\n", optarg, strerror(errno));
                                exit(2);
                        }
                        ident.bitmap_fd = bitmap_fd; /* for Assemble */
@@ -891,21 +1034,36 @@ int main(int argc, char *argv[])
                         * or from which assemble might recover a backup
                         */
                        if (backup_file) {
-                               fprintf(stderr, Name ": backup file already specified, rejecting %s\n", optarg);
+                               pr_err("backup file already specified, rejecting %s\n", optarg);
                                exit(2);
                        }
                        backup_file = optarg;
                        continue;
 
+               case O(GROW, Continue):
+                       /* Continue interrupted grow
+                        */
+                       grow_continue = 1;
+                       continue;
+               case O(ASSEMBLE, InvalidBackup):
+                       /* Acknowledge that the backupfile is invalid, but ask
+                        * to continue anyway
+                        */
+                       invalid_backup = 1;
+                       continue;
+
                case O(BUILD,'b'):
-               case O(CREATE,'b'): /* here we create the bitmap */
+               case O(BUILD,Bitmap):
+               case O(CREATE,'b'):
+               case O(CREATE,Bitmap): /* here we create the bitmap */
                        if (strcmp(optarg, "none") == 0) {
-                               fprintf(stderr, Name ": '--bitmap none' only"
-                                       " support for --grow\n");
+                               pr_err("'--bitmap none' only"
+                                       " supported for --grow\n");
                                exit(2);
                        }
                        /* FALL THROUGH */
                case O(GROW,'b'):
+               case O(GROW,Bitmap):
                        if (strcmp(optarg, "internal")== 0 ||
                            strcmp(optarg, "none")== 0 ||
                            strchr(optarg, '/') != NULL) {
@@ -913,22 +1071,21 @@ int main(int argc, char *argv[])
                                continue;
                        }
                        /* probable typo */
-                       fprintf(stderr, Name ": bitmap file must contain a '/', or be 'internal', or 'none'\n"
+                       pr_err("bitmap file must contain a '/', or be 'internal', or 'none'\n"
                                "       not '%s'\n", optarg);
                        exit(2);
 
                case O(GROW,BitmapChunk):
                case O(BUILD,BitmapChunk):
                case O(CREATE,BitmapChunk): /* bitmap chunksize */
-                       bitmap_chunk = strtol(optarg, &c, 10);
-                       if (!optarg[0] || *c || bitmap_chunk < 0 ||
-                                       bitmap_chunk & (bitmap_chunk - 1)) {
-                               fprintf(stderr, Name ": invalid bitmap chunksize: %s\n",
-                                               optarg);
+                       bitmap_chunk = parse_size(optarg);
+                       if (bitmap_chunk <= 0 ||
+                           bitmap_chunk & (bitmap_chunk - 1)) {
+                               pr_err("invalid bitmap chunksize: %s\n",
+                                      optarg);
                                exit(2);
                        }
-                       /* convert K to B, chunk of 0K means 512B */
-                       bitmap_chunk = bitmap_chunk ? bitmap_chunk * 1024 : 512;
+                       bitmap_chunk = bitmap_chunk * 512;
                        continue;
 
                case O(GROW, WriteBehind):
@@ -936,16 +1093,17 @@ int main(int argc, char *argv[])
                case O(CREATE, WriteBehind): /* write-behind mode */
                        write_behind = DEFAULT_MAX_WRITE_BEHIND;
                        if (optarg) {
-                               write_behind = strtol(optarg, &c, 10);
-                               if (write_behind < 0 || *c ||
+                               write_behind = parse_num(optarg);
+                               if (write_behind < 0 ||
                                    write_behind > 16383) {
-                                       fprintf(stderr, Name ": Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
+                                       pr_err("Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
                                        exit(2);
                                }
                        }
                        continue;
 
                case O(INCREMENTAL, 'r'):
+               case O(INCREMENTAL, RebuildMapOpt):
                        rebuild_map = 1;
                        continue;
                case O(INCREMENTAL, IncrementalPath):
@@ -956,31 +1114,24 @@ int main(int argc, char *argv[])
                 * an error
                 */
                if (option_index > 0)
-                       fprintf(stderr, Name ":option --%s not valid in %s mode\n",
+                       pr_err(":option --%s not valid in %s mode\n",
                                long_options[option_index].name,
                                map_num(modes, mode));
                else
-                       fprintf(stderr, Name ": option -%c not valid in %s mode\n",
+                       pr_err("option -%c not valid in %s mode\n",
                                opt, map_num(modes, mode));
                exit(2);
 
        }
 
        if (print_help) {
-               char *help_text = Help;
+               char *help_text;
                if (print_help == 2)
                        help_text = OptionHelp;
                else
-                       switch (mode) {
-                       case ASSEMBLE : help_text = Help_assemble; break;
-                       case BUILD    : help_text = Help_build; break;
-                       case CREATE   : help_text = Help_create; break;
-                       case MANAGE   : help_text = Help_manage; break;
-                       case MISC     : help_text = Help_misc; break;
-                       case MONITOR  : help_text = Help_monitor; break;
-                       case GROW     : help_text = Help_grow; break;
-                       case INCREMENTAL:help_text= Help_incr; break;
-                       }
+                       help_text = mode_help[mode];
+               if (help_text == NULL)
+                       help_text = Help;
                fputs(help_text,stdout);
                exit(0);
        }
@@ -1004,7 +1155,7 @@ int main(int argc, char *argv[])
                else if (strcasecmp(symlinks, "no") == 0)
                        ci->symlinks = 0;
                else {
-                       fprintf(stderr, Name ": option --symlinks must be 'no' or 'yes'\n");
+                       pr_err("option --symlinks must be 'no' or 'yes'\n");
                        exit(2);
                }
        }
@@ -1014,18 +1165,19 @@ int main(int argc, char *argv[])
         *
         * That is mosty checked in the per-mode stuff but...
         *
-        * For @,B,C  and A without -s, the first device listed must be an md device
-        * we check that here and open it.
+        * For @,B,C and A without -s, the first device listed must be
+        * an md device.  We check that here and open it.
         */
 
-       if (mode==MANAGE || mode == BUILD || mode == CREATE || mode == GROW ||
-           (mode == ASSEMBLE && ! scan)) {
+       if (mode == MANAGE || mode == BUILD || mode == CREATE
+           || mode == GROW
+           || (mode == ASSEMBLE && ! scan)) {
                if (devs_found < 1) {
-                       fprintf(stderr, Name ": an md device must be given in this mode\n");
+                       pr_err("an md device must be given in this mode\n");
                        exit(2);
                }
                if ((int)ident.super_minor == -2 && autof) {
-                       fprintf(stderr, Name ": --super-minor=dev is incompatible with --auto\n");
+                       pr_err("--super-minor=dev is incompatible with --auto\n");
                        exit(2);
                }
                if (mode == MANAGE || mode == GROW) {
@@ -1036,14 +1188,14 @@ int main(int argc, char *argv[])
                        /* non-existent device is OK */
                        mdfd = open_mddev(devlist->devname, 0);
                if (mdfd == -2) {
-                       fprintf(stderr, Name ": device %s exists but is not an "
+                       pr_err("device %s exists but is not an "
                                "md array.\n", devlist->devname);
                        exit(1);
                }
                if ((int)ident.super_minor == -2) {
                        struct stat stb;
                        if (mdfd < 0) {
-                               fprintf(stderr, Name ": --super-minor=dev given, and "
+                               pr_err("--super-minor=dev given, and "
                                        "listed device %s doesn't exist.\n",
                                        devlist->devname);
                                exit(1);
@@ -1061,38 +1213,32 @@ int main(int argc, char *argv[])
        }
 
        if (raiddisks) {
-               if (raiddisks > max_disks) {
-                       fprintf(stderr, Name ": invalid number of raid devices: %d\n",
-                               raiddisks);
-                       exit(2);
-               }
-               if (raiddisks == 1 &&  !force && level != -5) {
-                       fprintf(stderr, Name ": '1' is an unusual number of drives for an array, so it is probably\n"
+               if (raiddisks == 1 &&  !force && level != LEVEL_FAULTY) {
+                       pr_err("'1' is an unusual number of drives for an array, so it is probably\n"
                                "     a mistake.  If you really mean it you will need to specify --force before\n"
                                "     setting the number of drives.\n");
                        exit(2);
                }
        }
-       if (sparedisks) {
-               if ( sparedisks > max_disks - raiddisks) {
-                       fprintf(stderr, Name ": invalid number of spare-devices: %d\n",
-                               sparedisks);
-                       exit(2);
-               }
-       }
 
        if (homehost == NULL)
                homehost = conf_get_homehost(&require_homehost);
-       if (homehost == NULL || strcmp(homehost, "<system>")==0) {
+       if (homehost == NULL || strcasecmp(homehost, "<system>")==0) {
                if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
                        sys_hostname[sizeof(sys_hostname)-1] = 0;
                        homehost = sys_hostname;
                }
        }
+       if (homehost && (!homehost[0] || strcasecmp(homehost, "<none>") == 0)) {
+               homehost = NULL;
+               require_homehost = 0;
+       }
 
-       if ((mode != MISC || devmode != 'E') &&
-           geteuid() != 0) {
-               fprintf(stderr, Name ": must be super-user to perform this action\n");
+       if ((mode == MISC && devmode == 'E')
+           || (mode == MONITOR && spare_sharing == 0))
+               /* Anyone may try this */;
+       else if (geteuid() != 0) {
+               pr_err("must be super-user to perform this action\n");
                exit(1);
        }
 
@@ -1106,7 +1252,8 @@ int main(int argc, char *argv[])
                        rv = Manage_ro(devlist->devname, mdfd, readonly);
                if (!rv && devs_found>1)
                        rv = Manage_subdevs(devlist->devname, mdfd,
-                                           devlist->next, verbose-quiet, test);
+                                           devlist->next, verbose-quiet, test,
+                                           update, force);
                if (!rv && readonly < 0)
                        rv = Manage_ro(devlist->devname, mdfd, readonly);
                if (!rv && runstop)
@@ -1118,7 +1265,7 @@ int main(int argc, char *argv[])
                        /* Only a device has been given, so get details from config file */
                        struct mddev_ident *array_ident = conf_get_ident(devlist->devname);
                        if (array_ident == NULL) {
-                               fprintf(stderr, Name ": %s not identified in config file.\n",
+                               pr_err("%s not identified in config file.\n",
                                        devlist->devname);
                                rv |= 1;
                                if (mdfd >= 0)
@@ -1127,30 +1274,32 @@ int main(int argc, char *argv[])
                                if (array_ident->autof == 0)
                                        array_ident->autof = autof;
                                rv |= Assemble(ss, devlist->devname, array_ident,
-                                              NULL, backup_file,
+                                              NULL, backup_file, invalid_backup,
                                               readonly, runstop, update,
                                               homehost, require_homehost,
-                                              verbose-quiet, force);
+                                              verbose-quiet, force,
+                                              freeze_reshape);
                        }
                } else if (!scan)
                        rv = Assemble(ss, devlist->devname, &ident,
-                                     devlist->next, backup_file,
+                                     devlist->next, backup_file, invalid_backup,
                                      readonly, runstop, update,
                                      homehost, require_homehost,
-                                     verbose-quiet, force);
-               else if (devs_found>0) {
+                                     verbose-quiet, force,
+                                     freeze_reshape);
+               else if (devs_found > 0) {
                        if (update && devs_found > 1) {
-                               fprintf(stderr, Name ": can only update a single array at a time\n");
+                               pr_err("can only update a single array at a time\n");
                                exit(1);
                        }
                        if (backup_file && devs_found > 1) {
-                               fprintf(stderr, Name ": can only assemble a single array when providing a backup file.\n");
+                               pr_err("can only assemble a single array when providing a backup file.\n");
                                exit(1);
                        }
                        for (dv = devlist ; dv ; dv=dv->next) {
                                struct mddev_ident *array_ident = conf_get_ident(dv->devname);
                                if (array_ident == NULL) {
-                                       fprintf(stderr, Name ": %s not identified in config file.\n",
+                                       pr_err("%s not identified in config file.\n",
                                                dv->devname);
                                        rv |= 1;
                                        continue;
@@ -1158,138 +1307,45 @@ int main(int argc, char *argv[])
                                if (array_ident->autof == 0)
                                        array_ident->autof = autof;
                                rv |= Assemble(ss, dv->devname, array_ident,
-                                              NULL, backup_file,
+                                              NULL, backup_file, invalid_backup,
                                               readonly, runstop, update,
                                               homehost, require_homehost,
-                                              verbose-quiet, force);
+                                              verbose-quiet, force,
+                                              freeze_reshape);
                        }
                } else {
-                       struct mddev_ident *a, *array_list =  conf_get_ident(NULL);
-                       struct mddev_dev *devlist = conf_get_devs();
-                       int cnt = 0;
-                       int failures, successes;
-                       if (devlist == NULL) {
-                               fprintf(stderr, Name ": No devices listed in conf file were found.\n");
-                               exit(1);
-                       }
                        if (update) {
-                               fprintf(stderr, Name ": --update not meaningful with a --scan assembly.\n");
+                               pr_err("--update not meaningful with a --scan assembly.\n");
                                exit(1);
                        }
                        if (backup_file) {
-                               fprintf(stderr, Name ": --backup_file not meaningful with a --scan assembly.\n");
+                               pr_err("--backup_file not meaningful with a --scan assembly.\n");
                                exit(1);
                        }
-                       for (a = array_list; a ; a = a->next) {
-                               a->assembled = 0;
-                               if (a->autof == 0)
-                                       a->autof = autof;
-                       }
-                       do {
-                               failures = 0;
-                               successes = 0;
-                               rv = 0;
-                               for (a = array_list; a ; a = a->next) {
-                                       int r;
-                                       if (a->assembled)
-                                               continue;
-                                       if (a->devname &&
-                                           strcasecmp(a->devname, "<ignore>") == 0)
-                                               continue;
-                               
-                                       r = Assemble(ss, a->devname,
-                                                    a,
-                                                    NULL, NULL,
-                                                    readonly, runstop, NULL,
-                                                    homehost, require_homehost,
-                                                    verbose-quiet, force);
-                                       if (r == 0) {
-                                               a->assembled = 1;
-                                               successes++;
-                                       } else
-                                               failures++;
-                                       rv |= r;
-                                       cnt++;
-                               }
-                       } while (failures && successes);
-                       if (homehost && cnt == 0) {
-                               /* Maybe we can auto-assemble something.
-                                * Repeatedly call Assemble in auto-assemble mode
-                                * until it fails
-                                */
-                               int rv2;
-                               int acnt;
-                               ident.autof = autof;
-                               do {
-                                       struct mddev_dev *devlist = conf_get_devs();
-                                       acnt = 0;
-                                       do {
-                                               rv2 = Assemble(ss, NULL,
-                                                              &ident,
-                                                              devlist, NULL,
-                                                              readonly, runstop, NULL,
-                                                              homehost, require_homehost,
-                                                              verbose-quiet, force);
-                                               if (rv2==0) {
-                                                       cnt++;
-                                                       acnt++;
-                                               }
-                                               if (rv2 == 1)
-                                                       /* found something so even though assembly failed  we
-                                                        * want to avoid auto-updates
-                                                        */
-                                                       auto_update_home = 0;
-                                       } while (rv2!=2);
-                                       /* Incase there are stacked devices, we need to go around again */
-                               } while (acnt);
-#if 0
-                               if (cnt == 0 && auto_update_home && homehost) {
-                                       /* Nothing found, maybe we need to bootstrap homehost info */
-                                       do {
-                                               acnt = 0;
-                                               do {
-                                                       rv2 = Assemble(ss, NULL,
-                                                                      &ident,
-                                                                      NULL, NULL,
-                                                                      readonly, runstop, "homehost",
-                                                                      homehost, require_homehost,
-                                                                      verbose-quiet, force);
-                                                       if (rv2==0) {
-                                                               cnt++;
-                                                               acnt++;
-                                                       }
-                                               } while (rv2!=2);
-                                               /* Incase there are stacked devices, we need to go around again */
-                                       } while (acnt);
-                               }
-#endif
-                               if (cnt == 0 && rv == 0) {
-                                       fprintf(stderr, Name ": No arrays found in config file or automatically\n");
-                                       rv = 1;
-                               } else if (cnt)
-                                       rv = 0;
-                       } else if (cnt == 0 && rv == 0) {
-                               fprintf(stderr, Name ": No arrays found in config file\n");
-                               rv = 1;
-                       }
+                       rv = scan_assemble(autof, ss, readonly, runstop,
+                                          &ident, homehost,
+                                          require_homehost,
+                                          verbose - quiet,
+                                          force, freeze_reshape);
                }
+
                break;
        case BUILD:
                if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
                if (write_behind && !bitmap_file) {
-                       fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
+                       pr_err("write-behind mode requires a bitmap.\n");
                        rv = 1;
                        break;
                }
                if (raiddisks == 0) {
-                       fprintf(stderr, Name ": no raid-devices specified.\n");
+                       pr_err("no raid-devices specified.\n");
                        rv = 1;
                        break;
                }
 
                if (bitmap_file) {
                        if (strcmp(bitmap_file, "internal")==0) {
-                               fprintf(stderr, Name ": 'internal' bitmaps not supported with --build\n");
+                               pr_err("'internal' bitmaps not supported with --build\n");
                                rv |= 1;
                                break;
                        }
@@ -1302,12 +1358,12 @@ int main(int argc, char *argv[])
        case CREATE:
                if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
                if (write_behind && !bitmap_file) {
-                       fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
+                       pr_err("write-behind mode requires a bitmap.\n");
                        rv = 1;
                        break;
                }
                if (raiddisks == 0) {
-                       fprintf(stderr, Name ": no raid-devices specified.\n");
+                       pr_err("no raid-devices specified.\n");
                        rv = 1;
                        break;
                }
@@ -1315,19 +1371,20 @@ int main(int argc, char *argv[])
                rv = Create(ss, devlist->devname, chunk, level, layout, size<0 ? 0 : size,
                            raiddisks, sparedisks, ident.name, homehost,
                            ident.uuid_set ? ident.uuid : NULL,
-                           devs_found-1, devlist->next, runstop, verbose-quiet, force, assume_clean,
+                           devs_found-1, devlist->next, runstop,
+                           readonly, verbose-quiet, force, assume_clean,
                            bitmap_file, bitmap_chunk, write_behind, delay, autof);
                break;
        case MISC:
                if (devmode == 'E') {
                        if (devlist == NULL && !scan) {
-                               fprintf(stderr, Name ": No devices to examine\n");
+                               pr_err("No devices to examine\n");
                                exit(2);
                        }
                        if (devlist == NULL)
                                devlist = conf_get_devs();
                        if (devlist == NULL) {
-                               fprintf(stderr, Name ": No devices listed in %s\n", configfile?configfile:DefaultConfFile);
+                               pr_err("No devices listed in %s\n", configfile?configfile:DefaultConfFile);
                                exit(1);
                        }
                        if (brief && verbose)
@@ -1337,155 +1394,32 @@ int main(int argc, char *argv[])
                                     SparcAdjust, ss, homehost);
                } else if (devmode == DetailPlatform) {
                        rv = Detail_Platform(ss ? ss->ss : NULL, ss ? scan : 1, verbose);
-               } else {
-                       if (devlist == NULL) {
-                               if ((devmode=='D' || devmode == Waitclean) && scan) {
-                                       /* apply --detail or --wait-clean to
-                                        * all devices in /proc/mdstat
-                                        */
-                                       struct mdstat_ent *ms = mdstat_read(0, 1);
-                                       struct mdstat_ent *e;
-                                       struct map_ent *map = NULL;
-                                       int members;
-                                       int v = verbose>1?0:verbose+1;
-
-                                       for (members = 0; members <= 1; members++) {
-                                       for (e=ms ; e ; e=e->next) {
-                                               char *name;
-                                               struct map_ent *me;
-                                               int member = e->metadata_version &&
-                                                       strncmp(e->metadata_version,
-                                                               "external:/", 10) == 0;
-                                               if (members != member)
-                                                       continue;
-                                               me = map_by_devnum(&map, e->devnum);
-                                               if (me && me->path
-                                                   && strcmp(me->path, "/unknown") != 0)
-                                                       name = me->path;
-                                               else
-                                                       name = get_md_name(e->devnum);
-
-                                               if (!name) {
-                                                       fprintf(stderr, Name ": cannot find device file for %s\n",
-                                                               e->dev);
-                                                       continue;
-                                               }
-                                               if (devmode == 'D')
-                                                       rv |= Detail(name, v,
-                                                                    export, test,
-                                                                    homehost);
-                                               else
-                                                       rv |= WaitClean(name, -1, v);
-                                               put_md_name(name);
-                                       }
-                                       }
-                                       free_mdstat(ms);
-                               } else  if (devmode == 'S' && scan) {
-                                       /* apply --stop to all devices in /proc/mdstat */
-                                       /* Due to possible stacking of devices, repeat until
-                                        * nothing more can be stopped
-                                        */
-                                       int progress=1, err;
-                                       int last = 0;
-                                       do {
-                                               struct mdstat_ent *ms = mdstat_read(0, 0);
-                                               struct mdstat_ent *e;
-
-                                               if (!progress) last = 1;
-                                               progress = 0; err = 0;
-                                               for (e=ms ; e ; e=e->next) {
-                                                       char *name = get_md_name(e->devnum);
-
-                                                       if (!name) {
-                                                               fprintf(stderr, Name ": cannot find device file for %s\n",
-                                                                       e->dev);
-                                                               continue;
-                                                       }
-                                                       mdfd = open_mddev(name, 1);
-                                                       if (mdfd >= 0) {
-                                                               if (Manage_runstop(name, mdfd, -1, quiet?1:last?0:-1))
-                                                                       err = 1;
-                                                               else
-                                                                       progress = 1;
-                                                               close(mdfd);
-                                                       }
-
-                                                       put_md_name(name);
-                                               }
-                                               free_mdstat(ms);
-                                       } while (!last && err);
-                                       if (err) rv |= 1;
-                               } else {
-                                       fprintf(stderr, Name ": No devices given.\n");
-                                       exit(2);
-                               }
-                       }
-                       for (dv=devlist ; dv; dv=dv->next) {
-                               switch(dv->disposition) {
-                               case 'D':
-                                       rv |= Detail(dv->devname,
-                                                    brief?1+verbose:0,
-                                                    export, test, homehost);
-                                       continue;
-                               case 'K': /* Zero superblock */
-                                       if (ss)
-                                               rv |= Kill(dv->devname, ss, force, quiet,0);
-                                       else {
-                                               int q = quiet;
-                                               do {
-                                                       rv |= Kill(dv->devname, NULL, force, q, 0);
-                                                       q = 1;
-                                               } while (rv == 0);
-                                               rv &= ~2;
-                                       }
-                                       continue;
-                               case 'Q':
-                                       rv |= Query(dv->devname); continue;
-                               case 'X':
-                                       rv |= ExamineBitmap(dv->devname, brief, ss); continue;
-                               case 'W':
-                                       rv |= Wait(dv->devname); continue;
-                               case Waitclean:
-                                       rv |= WaitClean(dv->devname, -1, verbose-quiet); continue;
-                               case KillSubarray:
-                                       rv |= Kill_subarray(dv->devname, subarray, quiet);
-                                       continue;
-                               case UpdateSubarray:
-                                       if (update == NULL) {
-                                               fprintf(stderr,
-                                                       Name ": -U/--update must be specified with --update-subarray\n");
-                                               rv |= 1;
-                                               continue;
-                                       }
-                                       rv |= Update_subarray(dv->devname, subarray, update, &ident, quiet);
-                                       continue;
-                               }
-                               mdfd = open_mddev(dv->devname, 1);
-                               if (mdfd>=0) {
-                                       switch(dv->disposition) {
-                                       case 'R':
-                                               rv |= Manage_runstop(dv->devname, mdfd, 1, quiet); break;
-                                       case 'S':
-                                               rv |= Manage_runstop(dv->devname, mdfd, -1, quiet); break;
-                                       case 'o':
-                                               rv |= Manage_ro(dv->devname, mdfd, 1); break;
-                                       case 'w':
-                                               rv |= Manage_ro(dv->devname, mdfd, -1); break;
-                                       }
-                                       close(mdfd);
-                               } else
-                                       rv |= 1;
+               } else if (devlist == NULL) {
+                       if (devmode == 'S' && scan)
+                               rv = stop_scan(quiet);
+                       else if ((devmode == 'D' || devmode == Waitclean) && scan)
+                               rv = misc_scan(devmode, verbose, export,
+                                              test, homehost, prefer);
+                       else if (devmode == UdevRules)
+                               rv = Write_rules(udev_filename);
+                       else {
+                               pr_err("No devices given.\n");
+                               exit(2);
                        }
-               }
+               } else
+                       rv = misc_list(devlist, brief, verbose, export, test,
+                                      homehost, prefer, subarray, update,
+                                      &ident,
+                                      ss, force, quiet);
                break;
        case MONITOR:
                if (!devlist && !scan) {
-                       fprintf(stderr, Name ": Cannot monitor: need --scan or at least one device\n");
+                       pr_err("Cannot monitor: need --scan or at least one device\n");
                        rv = 1;
                        break;
                }
                if (pidfile && !daemonise) {
-                       fprintf(stderr, Name ": Cannot write a pid file when not in daemon mode\n");
+                       pr_err("Cannot write a pid file when not in daemon mode\n");
                        rv = 1;
                        break;
                }
@@ -1498,7 +1432,8 @@ int main(int argc, char *argv[])
                }
                rv= Monitor(devlist, mailaddr, program,
                            delay?delay:60, daemonise, scan, oneshot,
-                           dosyslog, test, pidfile, increments, spare_sharing);
+                           dosyslog, test, pidfile, increments,
+                           spare_sharing, prefer);
                break;
 
        case GROW:
@@ -1511,7 +1446,7 @@ int main(int argc, char *argv[])
                        struct mdinfo sra;
                        int err;
                        if (raiddisks || level != UnSet) {
-                               fprintf(stderr, Name ": cannot change array size in same operation "
+                               pr_err("cannot change array size in same operation "
                                        "as changing raiddisks or level.\n"
                                        "    Change size first, then check that data is still intact.\n");
                                rv = 1;
@@ -1524,31 +1459,35 @@ int main(int argc, char *argv[])
                                err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
                        if (err < 0) {
                                if (errno == E2BIG)
-                                       fprintf(stderr, Name ": --array-size setting"
+                                       pr_err("--array-size setting"
                                                " is too large.\n");
                                else
-                                       fprintf(stderr, Name ": current kernel does"
+                                       pr_err("current kernel does"
                                                " not support setting --array-size\n");
                                rv = 1;
                                break;
                        }
                }
-               if (devs_found > 1) {
-
+               if (devs_found > 1 && raiddisks == 0) {
                        /* must be '-a'. */
-                       if (size >= 0 || raiddisks || chunk || layout_str != NULL || bitmap_file) {
-                               fprintf(stderr, Name ": --add cannot be used with other geometry changes in --grow mode\n");
+                       if (size >= 0 || chunk || layout_str != NULL || bitmap_file) {
+                               pr_err("--add cannot be used with "
+                                       "other geometry changes in --grow mode\n");
                                rv = 1;
                                break;
                        }
                        for (dv=devlist->next; dv ; dv=dv->next) {
-                               rv = Grow_Add_device(devlist->devname, mdfd, dv->devname);
+                               rv = Grow_Add_device(devlist->devname, mdfd,
+                                                    dv->devname);
                                if (rv)
                                        break;
                        }
                } else if (bitmap_file) {
-                       if (size >= 0 || raiddisks || chunk || layout_str != NULL) {
-                               fprintf(stderr, Name ": --bitmap changes cannot be used with other geometry changes in --grow mode\n");
+                       if (size >= 0 || raiddisks || chunk ||
+                           layout_str != NULL || devs_found > 1) {
+                               pr_err("--bitmap changes cannot be "
+                                       "used with other geometry changes "
+                                       "in --grow mode\n");
                                rv = 1;
                                break;
                        }
@@ -1556,12 +1495,18 @@ int main(int argc, char *argv[])
                                delay = DEFAULT_BITMAP_DELAY;
                        rv = Grow_addbitmap(devlist->devname, mdfd, bitmap_file,
                                            bitmap_chunk, delay, write_behind, force);
-               } else if (size >= 0 || raiddisks != 0 || layout_str != NULL
-                          || chunk != 0 || level != UnSet) {
+               } else if (grow_continue)
+                       rv = Grow_continue_command(devlist->devname,
+                                                  mdfd, backup_file,
+                                                  verbose);
+               else if (size >= 0 || raiddisks != 0 || layout_str != NULL
+                        || chunk != 0 || level != UnSet) {
                        rv = Grow_reshape(devlist->devname, mdfd, quiet, backup_file,
-                                         size, level, layout_str, chunk, raiddisks);
+                                         size, level, layout_str, chunk, raiddisks,
+                                         devlist->next,
+                                         assume_clean, force);
                } else if (array_size < 0)
-                       fprintf(stderr, Name ": no changes to --grow\n");
+                       pr_err("no changes to --grow\n");
                break;
        case INCREMENTAL:
                if (rebuild_map) {
@@ -1569,28 +1514,24 @@ int main(int argc, char *argv[])
                }
                if (scan) {
                        if (runstop <= 0) {
-                               fprintf(stderr, Name
-                        ": --incremental --scan meaningless without --run.\n");
+                               pr_err("--incremental --scan meaningless without --run.\n");
                                break;
                        }
                        if (devmode == 'f') {
-                               fprintf(stderr, Name
-                        ": --incremental --scan --fail not supported.\n");
+                               pr_err("--incremental --scan --fail not supported.\n");
                                break;
                        }
                        rv = IncrementalScan(verbose);
                }
                if (!devlist) {
                        if (!rebuild_map && !scan) {
-                               fprintf(stderr, Name
-                                       ": --incremental requires a device.\n");
+                               pr_err("--incremental requires a device.\n");
                                rv = 1;
                        }
                        break;
                }
                if (devlist->next) {
-                       fprintf(stderr, Name
-                              ": --incremental can only handle one device.\n");
+                       pr_err("--incremental can only handle one device.\n");
                        rv = 1;
                        break;
                }
@@ -1600,7 +1541,8 @@ int main(int argc, char *argv[])
                else
                        rv = Incremental(devlist->devname, verbose-quiet,
                                         runstop, ss, homehost,
-                                        require_homehost, autof);
+                                        require_homehost, autof,
+                                        freeze_reshape);
                break;
        case AUTODETECT:
                autodetect();
@@ -1608,3 +1550,265 @@ int main(int argc, char *argv[])
        }
        exit(rv);
 }
+
+static int scan_assemble(int autof, struct supertype *ss,
+                        int readonly, int runstop,
+                        struct mddev_ident *ident,
+                        char *homehost, int require_homehost,
+                        int verbose, int force,
+                        int freeze_reshape)
+{
+       struct mddev_ident *a, *array_list =  conf_get_ident(NULL);
+       struct mddev_dev *devlist = conf_get_devs();
+       struct map_ent *map = NULL;
+       int cnt = 0;
+       int rv = 0;
+       int failures, successes;
+
+       if (conf_verify_devnames(array_list)) {
+               pr_err("Duplicate MD device names in "
+                      "conf file were found.\n");
+               return 1;
+       }
+       if (devlist == NULL) {
+               pr_err("No devices listed in conf file were found.\n");
+               return 1;
+       }
+       for (a = array_list; a ; a = a->next) {
+               a->assembled = 0;
+               if (a->autof == 0)
+                       a->autof = autof;
+       }
+       if (map_lock(&map))
+               pr_err("%s: failed to get "
+                      "exclusive lock on mapfile\n",
+                      __func__);
+       do {
+               failures = 0;
+               successes = 0;
+               rv = 0;
+               for (a = array_list; a ; a = a->next) {
+                       int r;
+                       if (a->assembled)
+                               continue;
+                       if (a->devname &&
+                           strcasecmp(a->devname, "<ignore>") == 0)
+                               continue;
+                               
+                       r = Assemble(ss, a->devname,
+                                    a,
+                                    NULL, NULL, 0,
+                                    readonly, runstop, NULL,
+                                    homehost, require_homehost,
+                                    verbose, force,
+                                    freeze_reshape);
+                       if (r == 0) {
+                               a->assembled = 1;
+                               successes++;
+                       } else
+                               failures++;
+                       rv |= r;
+                       cnt++;
+               }
+       } while (failures && successes);
+       if (homehost && cnt == 0) {
+               /* Maybe we can auto-assemble something.
+                * Repeatedly call Assemble in auto-assemble mode
+                * until it fails
+                */
+               int rv2;
+               int acnt;
+               ident->autof = autof;
+               do {
+                       struct mddev_dev *devlist = conf_get_devs();
+                       acnt = 0;
+                       do {
+                               rv2 = Assemble(ss, NULL,
+                                              ident,
+                                              devlist, NULL, 0,
+                                              readonly,
+                                              runstop, NULL,
+                                              homehost,
+                                              require_homehost,
+                                              verbose,
+                                              force,
+                                              freeze_reshape);
+                               if (rv2==0) {
+                                       cnt++;
+                                       acnt++;
+                               }
+                       } while (rv2!=2);
+                       /* Incase there are stacked devices, we need to go around again */
+               } while (acnt);
+               if (cnt == 0 && rv == 0) {
+                       pr_err("No arrays found in config file or automatically\n");
+                       rv = 1;
+               } else if (cnt)
+                       rv = 0;
+       } else if (cnt == 0 && rv == 0) {
+               pr_err("No arrays found in config file\n");
+               rv = 1;
+       }
+       map_unlock(&map);
+       return rv;
+}
+
+static int misc_scan(char devmode, int verbose, int export, int test,
+                    char *homehost, char *prefer)
+{
+       /* apply --detail or --wait-clean to
+        * all devices in /proc/mdstat
+        */
+       struct mdstat_ent *ms = mdstat_read(0, 1);
+       struct mdstat_ent *e;
+       struct map_ent *map = NULL;
+       int members;
+       int v = verbose>1?0:verbose+1;
+       int rv = 0;
+
+       for (members = 0; members <= 1; members++) {
+               for (e=ms ; e ; e=e->next) {
+                       char *name;
+                       struct map_ent *me;
+                       int member = e->metadata_version &&
+                               strncmp(e->metadata_version,
+                                       "external:/", 10) == 0;
+                       if (members != member)
+                               continue;
+                       me = map_by_devnum(&map, e->devnum);
+                       if (me && me->path
+                           && strcmp(me->path, "/unknown") != 0)
+                               name = me->path;
+                       else
+                               name = get_md_name(e->devnum);
+
+                       if (!name) {
+                               pr_err("cannot find device file for %s\n",
+                                       e->dev);
+                               continue;
+                       }
+                       if (devmode == 'D')
+                               rv |= Detail(name, v,
+                                            export, test,
+                                            homehost, prefer);
+                       else
+                               rv |= WaitClean(name, -1, v);
+                       put_md_name(name);
+               }
+       }
+       free_mdstat(ms);
+       return rv;
+}
+
+static int stop_scan(int quiet)
+{
+       /* apply --stop to all devices in /proc/mdstat */
+       /* Due to possible stacking of devices, repeat until
+        * nothing more can be stopped
+        */
+       int progress=1, err;
+       int last = 0;
+       int rv = 0;
+       do {
+               struct mdstat_ent *ms = mdstat_read(0, 0);
+               struct mdstat_ent *e;
+
+               if (!progress) last = 1;
+               progress = 0; err = 0;
+               for (e=ms ; e ; e=e->next) {
+                       char *name = get_md_name(e->devnum);
+                       int mdfd;
+
+                       if (!name) {
+                               pr_err("cannot find device file for %s\n",
+                                       e->dev);
+                               continue;
+                       }
+                       mdfd = open_mddev(name, 1);
+                       if (mdfd >= 0) {
+                               if (Manage_runstop(name, mdfd, -1, quiet?1:last?0:-1))
+                                       err = 1;
+                               else
+                                       progress = 1;
+                               close(mdfd);
+                       }
+
+                       put_md_name(name);
+               }
+               free_mdstat(ms);
+       } while (!last && err);
+       if (err)
+               rv |= 1;
+       return rv;
+}
+
+static int misc_list(struct mddev_dev *devlist,
+                    int brief, int verbose, int export, int test,
+                    char *homehost, char *prefer, char *subarray,
+                    char *update, struct mddev_ident *ident,
+                    struct supertype *ss, int force, int quiet)
+{
+       struct mddev_dev *dv;
+       int rv = 0;
+
+       for (dv=devlist ; dv; dv=dv->next) {
+               int mdfd;
+
+               switch(dv->disposition) {
+               case 'D':
+                       rv |= Detail(dv->devname,
+                                    brief?1+verbose:0,
+                                    export, test, homehost, prefer);
+                       continue;
+               case KillOpt: /* Zero superblock */
+                       if (ss)
+                               rv |= Kill(dv->devname, ss, force, quiet,0);
+                       else {
+                               int q = quiet;
+                               do {
+                                       rv |= Kill(dv->devname, NULL, force, q, 0);
+                                       q = 1;
+                               } while (rv == 0);
+                               rv &= ~2;
+                       }
+                       continue;
+               case 'Q':
+                       rv |= Query(dv->devname); continue;
+               case 'X':
+                       rv |= ExamineBitmap(dv->devname, brief, ss); continue;
+               case 'W':
+               case WaitOpt:
+                       rv |= Wait(dv->devname); continue;
+               case Waitclean:
+                       rv |= WaitClean(dv->devname, -1, verbose-quiet); continue;
+               case KillSubarray:
+                       rv |= Kill_subarray(dv->devname, subarray, quiet);
+                       continue;
+               case UpdateSubarray:
+                       if (update == NULL) {
+                               pr_err("-U/--update must be specified with --update-subarray\n");
+                               rv |= 1;
+                               continue;
+                       }
+                       rv |= Update_subarray(dv->devname, subarray,
+                                             update, ident, quiet);
+                       continue;
+               }
+               mdfd = open_mddev(dv->devname, 1);
+               if (mdfd>=0) {
+                       switch(dv->disposition) {
+                       case 'R':
+                               rv |= Manage_runstop(dv->devname, mdfd, 1, quiet); break;
+                       case 'S':
+                               rv |= Manage_runstop(dv->devname, mdfd, -1, quiet); break;
+                       case 'o':
+                               rv |= Manage_ro(dv->devname, mdfd, 1); break;
+                       case 'w':
+                               rv |= Manage_ro(dv->devname, mdfd, -1); break;
+                       }
+                       close(mdfd);
+               } else
+                       rv |= 1;
+       }
+       return rv;
+}