Adding upstream version 4.2.upstream/4.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2078 insertions, 0 deletions

diff --git a/mdadm.c b/mdadm.c
new file mode 100644
index 0000000..26299b2
--- /dev/null
+++ b/mdadm.c
@@ -0,0 +1,2078 @@
+/*
+ * mdadm - manage Linux "md" devices aka RAID arrays.
+ *
+ * Copyright (C) 2001-2013 Neil Brown <neilb@suse.de>
+ *
+ *
+ *    This program is free software; you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation; either version 2 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *    Author: Neil Brown
+ *    Email: <neilb@suse.de>
+ *
+ *    Additions for bitmap and write-behind RAID options, Copyright (C) 2003-2004,
+ *    Paul Clements, SteelEye Technology, Inc.
+ */
+
+#include "mdadm.h"
+#include "md_p.h"
+#include <ctype.h>
+
+static int scan_assemble(struct supertype *ss,
+			 struct context *c,
+			 struct mddev_ident *ident);
+static int misc_scan(char devmode, struct context *c);
+static int stop_scan(int verbose);
+static int misc_list(struct mddev_dev *devlist,
+		     struct mddev_ident *ident,
+		     char *dump_directory,
+		     struct supertype *ss, struct context *c);
+const char Name[] = "mdadm";
+
+int main(int argc, char *argv[])
+{
+	int mode = 0;
+	int opt;
+	int option_index;
+	int rv;
+	int i;
+
+	unsigned long long array_size = 0;
+	unsigned long long data_offset = INVALID_SECTORS;
+	struct mddev_ident ident;
+	char *configfile = NULL;
+	int devmode = 0;
+	int bitmap_fd = -1;
+	struct mddev_dev *devlist = NULL;
+	struct mddev_dev **devlistend = & devlist;
+	struct mddev_dev *dv;
+	mdu_array_info_t array;
+	int devs_found = 0;
+	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
+	 * 1  - don't create (no)
+	 * 2  - if is_standard, then create (yes)
+	 * 3  - create as 'md' - reject is_standard mdp (md)
+	 * 4  - create as 'mdp' - reject is_standard md (mdp)
+	 * 5  - default to md if not is_standard (md in config file)
+	 * 6  - default to mdp if not is_standard (part, or mdp in config file)
+	 */
+	struct context c = {
+		.require_homehost = 1,
+	};
+	struct shape s = {
+		.journaldisks	= 0,
+		.level		= UnSet,
+		.layout		= UnSet,
+		.bitmap_chunk	= UnSet,
+		.consistency_policy	= CONSISTENCY_POLICY_UNKNOWN,
+	};
+
+	char sys_hostname[256];
+	char *mailaddr = NULL;
+	char *program = NULL;
+	int increments = 20;
+	int daemonise = 0;
+	char *pidfile = NULL;
+	int oneshot = 0;
+	int spare_sharing = 1;
+	struct supertype *ss = NULL;
+	enum flag_mode writemostly = FlagDefault;
+	enum flag_mode failfast = FlagDefault;
+	char *shortopt = short_options;
+	int dosyslog = 0;
+	int rebuild_map = 0;
+	char *remove_path = NULL;
+	char *udev_filename = NULL;
+	char *dump_directory = NULL;
+
+	int print_help = 0;
+	FILE *outf;
+
+	int mdfd = -1;
+	int locked = 0;
+
+	srandom(time(0) ^ getpid());
+
+	ident.uuid_set = 0;
+	ident.level = UnSet;
+	ident.raid_disks = UnSet;
+	ident.super_minor = UnSet;
+	ident.devices = 0;
+	ident.spare_group = NULL;
+	ident.autof = 0;
+	ident.st = NULL;
+	ident.bitmap_fd = -1;
+	ident.bitmap_file = NULL;
+	ident.name[0] = 0;
+	ident.container = NULL;
+	ident.member = NULL;
+
+	if (get_linux_version() < 2006015) {
+		pr_err("This version of mdadm does not support kernels older than 2.6.15\n");
+		exit(1);
+	}
+
+	while ((option_index = -1),
+	       (opt = getopt_long(argc, argv, shortopt, long_options,
+				  &option_index)) != -1) {
+		int newmode = mode;
+		/* firstly, some mode-independent options */
+		switch(opt) {
+		case HelpOptions:
+			print_help = 2;
+			continue;
+		case 'h':
+			print_help = 1;
+			continue;
+
+		case 'V':
+			fputs(Version, stderr);
+			exit(0);
+
+		case 'v': c.verbose++;
+			continue;
+
+		case 'q': c.verbose--;
+			continue;
+
+		case 'b':
+			if (mode == ASSEMBLE || mode == BUILD ||
+			    mode == CREATE || mode == GROW ||
+			    mode == INCREMENTAL || mode == MANAGE)
+				break; /* b means bitmap */
+		case Brief:
+			c.brief = 1;
+			continue;
+
+		case NoDevices:
+			c.no_devices = 1;
+			continue;
+
+		case 'Y': c.export++;
+			continue;
+
+		case HomeHost:
+			if (strcasecmp(optarg, "<ignore>") == 0)
+				c.require_homehost = 0;
+			else
+				c.homehost = optarg;
+			continue;
+
+		case OffRootOpt:
+			/* Silently ignore old option */
+			continue;
+
+		case Prefer:
+			if (c.prefer)
+				free(c.prefer);
+			if (asprintf(&c.prefer, "/%s/", optarg) <= 0)
+				c.prefer = NULL;
+			continue;
+
+		case ':':
+		case '?':
+			fputs(Usage, stderr);
+			exit(2);
+		}
+		/* second, figure out the mode.
+		 * Some options force the mode.  Others
+		 * set the mode if it isn't already
+		 */
+
+		switch(opt) {
+		case ManageOpt:
+			newmode = MANAGE;
+			shortopt = short_bitmap_options;
+			break;
+		case 'a':
+		case Add:
+		case AddSpare:
+		case AddJournal:
+		case 'r':
+		case Remove:
+		case Replace:
+		case With:
+		case 'f':
+		case Fail:
+		case ReAdd: /* re-add */
+		case ClusterConfirm:
+			if (!mode) {
+				newmode = MANAGE;
+				shortopt = short_bitmap_options;
+			}
+			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;
+		case AutoDetect:
+			newmode = AUTODETECT;
+			break;
+
+		case MiscOpt:
+		case 'D':
+		case 'E':
+		case 'X':
+		case 'Q':
+		case ExamineBB:
+		case Dump:
+		case Restore:
+		case Action:
+			newmode = MISC;
+			break;
+
+		case 'R':
+		case 'S':
+		case 'o':
+		case 'w':
+		case 'W':
+		case WaitOpt:
+		case Waitclean:
+		case DetailPlatform:
+		case KillSubarray:
+		case UpdateSubarray:
+		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.. */
+			pr_err("");
+			if (option_index >= 0)
+				fprintf(stderr, "--%s", long_options[option_index].name);
+			else
+				fprintf(stderr, "-%c", opt);
+			fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
+				map_num(modes, newmode),
+				map_num(modes, mode));
+			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);
+				cont_err("Action options must come before device names\n");
+				exit(2);
+			}
+		} else {
+			/* special case of -c --help */
+			if ((opt == 'c' || opt == ConfigFile) &&
+			    (strncmp(optarg, "--h", 3) == 0 ||
+			     strncmp(optarg, "-h", 2) == 0)) {
+				fputs(Help_config, stdout);
+				exit(0);
+			}
+
+			/* If first option is a device, don't force the mode yet */
+			if (opt == 1) {
+				if (devs_found == 0) {
+					dv = xmalloc(sizeof(*dv));
+					dv->devname = optarg;
+					dv->disposition = devmode;
+					dv->writemostly = writemostly;
+					dv->failfast = failfast;
+					dv->used = 0;
+					dv->next = NULL;
+					*devlistend = dv;
+					devlistend = &dv->next;
+
+					devs_found++;
+					continue;
+				}
+				/* No mode yet, and this is the second device ... */
+				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)
+				pr_err("--%s", long_options[option_index].name);
+			else
+				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 ManageOpt:
+		case MiscOpt:
+		case 'A':
+		case 'B':
+		case 'C':
+		case 'F':
+		case 'G':
+		case 'I':
+		case AutoDetect:
+			continue;
+		}
+		if (opt == 1) {
+			/* an undecorated option - must be a device name.
+			 */
+
+			if (devs_found > 0 && devmode == DetailPlatform) {
+				pr_err("controller may only be specified once. %s ignored\n",
+						optarg);
+				continue;
+			}
+
+			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 == GROW && !devmode) {
+				pr_err("Must give -a/--add for devices to add: %s\n", optarg);
+				exit(2);
+			}
+			dv = xmalloc(sizeof(*dv));
+			dv->devname = optarg;
+			dv->disposition = devmode;
+			dv->writemostly = writemostly;
+			dv->failfast = failfast;
+			dv->used = 0;
+			dv->next = NULL;
+			*devlistend = dv;
+			devlistend = &dv->next;
+
+			devs_found++;
+			continue;
+		}
+
+		/* We've got a mode, and opt is now something else which
+		 * could depend on the mode */
+#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 (s.chunk) {
+				pr_err("chunk/rounding may only be specified once. Second value is %s.\n", optarg);
+				exit(2);
+			}
+			s.chunk = parse_size(optarg);
+			if (s.chunk == INVALID_SECTORS ||
+			    s.chunk < 8 || (s.chunk&1)) {
+				pr_err("invalid chunk/rounding value: %s\n",
+					optarg);
+				exit(2);
+			}
+			/* Convert sectors to K */
+			s.chunk /= 2;
+			continue;
+
+		case O(INCREMENTAL, 'e'):
+		case O(CREATE,'e'):
+		case O(ASSEMBLE,'e'):
+		case O(MISC,'e'): /* set metadata (superblock) information */
+			if (ss) {
+				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) {
+				pr_err("unrecognised metadata identifier: %s\n", optarg);
+				exit(2);
+			}
+			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 = FlagSet;
+			continue;
+
+		case O(MANAGE,'w'):
+			/* clear write-mostly for following devices */
+			writemostly = FlagClear;
+			continue;
+
+		case O(MANAGE,FailFast):
+		case O(CREATE,FailFast):
+			failfast = FlagSet;
+			continue;
+		case O(MANAGE,NoFailFast):
+			failfast = FlagClear;
+			continue;
+
+		case O(GROW,'z'):
+		case O(CREATE,'z'):
+		case O(BUILD,'z'): /* size */
+			if (s.size > 0) {
+				pr_err("size may only be specified once. Second value is %s.\n", optarg);
+				exit(2);
+			}
+			if (strcmp(optarg, "max") == 0)
+				s.size = MAX_SIZE;
+			else {
+				s.size = parse_size(optarg);
+				if (s.size == INVALID_SECTORS || s.size < 8) {
+					pr_err("invalid size: %s\n", optarg);
+					exit(2);
+				}
+				/* convert sectors to K */
+				s.size /= 2;
+			}
+			continue;
+
+		case O(GROW,'Z'): /* array size */
+			if (array_size > 0) {
+				pr_err("array-size may only be specified once. Second value is %s.\n", optarg);
+				exit(2);
+			}
+			if (strcmp(optarg, "max") == 0)
+				array_size = MAX_SIZE;
+			else {
+				array_size = parse_size(optarg);
+				if (array_size == 0 ||
+				    array_size == INVALID_SECTORS) {
+					pr_err("invalid array size: %s\n",
+						optarg);
+					exit(2);
+				}
+			}
+			continue;
+
+		case O(CREATE,DataOffset):
+		case O(GROW,DataOffset):
+			if (data_offset != INVALID_SECTORS) {
+				pr_err("data-offset may only be specified one. Second value is %s.\n", optarg);
+				exit(2);
+			}
+			if (mode == CREATE && strcmp(optarg, "variable") == 0)
+				data_offset = VARIABLE_OFFSET;
+			else
+				data_offset = parse_size(optarg);
+			if (data_offset == INVALID_SECTORS) {
+				pr_err("invalid data-offset: %s\n",
+					optarg);
+				exit(2);
+			}
+			continue;
+
+		case O(GROW,'l'):
+		case O(CREATE,'l'):
+		case O(BUILD,'l'): /* set raid level*/
+			if (s.level != UnSet) {
+				pr_err("raid level may only be set once.  Second value is %s.\n", optarg);
+				exit(2);
+			}
+			s.level = map_name(pers, optarg);
+			if (s.level == UnSet) {
+				pr_err("invalid raid level: %s\n",
+					optarg);
+				exit(2);
+			}
+			if (s.level != 0 && s.level != LEVEL_LINEAR &&
+			    s.level != 1 && s.level != LEVEL_MULTIPATH &&
+			    s.level != LEVEL_FAULTY && s.level != 10 &&
+			    mode == BUILD) {
+				pr_err("Raid level %s not permitted with --build.\n",
+					optarg);
+				exit(2);
+			}
+			if (s.sparedisks > 0 && s.level < 1 && s.level >= -1) {
+				pr_err("raid level %s is incompatible with spare-devices setting.\n",
+					optarg);
+				exit(2);
+			}
+			ident.level = s.level;
+			continue;
+
+		case O(GROW, 'p'): /* new layout */
+		case O(GROW, Layout):
+			if (s.layout_str) {
+				pr_err("layout may only be sent once.  Second value was %s\n", optarg);
+				exit(2);
+			}
+			s.layout_str = optarg;
+			/* 'Grow' will parse the value */
+			continue;
+
+		case O(CREATE,'p'): /* raid5 layout */
+		case O(CREATE,Layout):
+		case O(BUILD,'p'): /* faulty layout */
+		case O(BUILD,Layout):
+			if (s.layout != UnSet) {
+				pr_err("layout may only be sent once.  Second value was %s\n", optarg);
+				exit(2);
+			}
+			switch(s.level) {
+			default:
+				pr_err("layout not meaningful for %s arrays.\n",
+					map_num(pers, s.level));
+				exit(2);
+			case UnSet:
+				pr_err("raid level must be given before layout.\n");
+				exit(2);
+
+			case 0:
+				s.layout = map_name(r0layout, optarg);
+				if (s.layout == UnSet) {
+					pr_err("layout %s not understood for raid0.\n",
+						optarg);
+					exit(2);
+				}
+				break;
+			case 5:
+				s.layout = map_name(r5layout, optarg);
+				if (s.layout == UnSet) {
+					pr_err("layout %s not understood for raid5.\n",
+						optarg);
+					exit(2);
+				}
+				break;
+			case 6:
+				s.layout = map_name(r6layout, optarg);
+				if (s.layout == UnSet) {
+					pr_err("layout %s not understood for raid6.\n",
+						optarg);
+					exit(2);
+				}
+				break;
+
+			case 10:
+				s.layout = parse_layout_10(optarg);
+				if (s.layout < 0) {
+					pr_err("layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
+					exit(2);
+				}
+				break;
+			case LEVEL_FAULTY:
+				/* Faulty
+				 * modeNNN
+				 */
+				s.layout = parse_layout_faulty(optarg);
+				if (s.layout == -1) {
+					pr_err("layout %s not understood for faulty.\n",
+						optarg);
+					exit(2);
+				}
+				break;
+			}
+			continue;
+
+		case O(CREATE,AssumeClean):
+		case O(BUILD,AssumeClean): /* assume clean */
+		case O(GROW,AssumeClean):
+			s.assume_clean = 1;
+			continue;
+
+		case O(GROW,'n'):
+		case O(CREATE,'n'):
+		case O(BUILD,'n'): /* number of raid disks */
+			if (s.raiddisks) {
+				pr_err("raid-devices set twice: %d and %s\n",
+					s.raiddisks, optarg);
+				exit(2);
+			}
+			if (parse_num(&s.raiddisks, optarg) != 0 || s.raiddisks <= 0) {
+				pr_err("invalid number of raid devices: %s\n",
+					optarg);
+				exit(2);
+			}
+			ident.raid_disks = s.raiddisks;
+			continue;
+		case O(ASSEMBLE, Nodes):
+		case O(GROW, Nodes):
+		case O(CREATE, Nodes):
+			if (parse_num(&c.nodes, optarg) != 0 || c.nodes < 2) {
+				pr_err("clustered array needs two nodes at least: %s\n",
+					optarg);
+				exit(2);
+			}
+			continue;
+		case O(CREATE, ClusterName):
+		case O(ASSEMBLE, ClusterName):
+			c.homecluster = optarg;
+			if (strlen(c.homecluster) > 64) {
+				pr_err("Cluster name too big.\n");
+				exit(2);
+			}
+			continue;
+		case O(CREATE,'x'): /* number of spare (eXtra) disks */
+			if (s.sparedisks) {
+				pr_err("spare-devices set twice: %d and %s\n",
+				       s.sparedisks, optarg);
+				exit(2);
+			}
+			if (s.level != UnSet && s.level <= 0 && s.level >= -1) {
+				pr_err("spare-devices setting is incompatible with raid level %d\n",
+					s.level);
+				exit(2);
+			}
+			if (parse_num(&s.sparedisks, optarg) != 0 || s.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(INCREMENTAL,Auto):
+		case O(ASSEMBLE,'a'):
+		case O(ASSEMBLE,Auto): /* auto-creation of device node */
+			c.autof = parse_auto(optarg, "--auto flag", 0);
+			continue;
+
+		case O(CREATE,Symlinks):
+		case O(BUILD,Symlinks):
+		case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
+			symlinks = optarg;
+			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 */
+			c.force = 1;
+			continue;
+			/* now for the Assemble options */
+		case O(ASSEMBLE, FreezeReshape):   /* Freeze reshape during
+						    * initrd phase */
+		case O(INCREMENTAL, FreezeReshape):
+			c.freeze_reshape = 1;
+			continue;
+		case O(CREATE,'u'): /* uuid of array */
+		case O(ASSEMBLE,'u'): /* uuid of array */
+			if (ident.uuid_set) {
+				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 {
+				pr_err("Bad uuid: %s\n", optarg);
+				exit(2);
+			}
+			continue;
+
+		case O(CREATE,'N'):
+		case O(ASSEMBLE,'N'):
+		case O(MISC,'N'):
+			if (ident.name[0]) {
+				pr_err("name cannot be set twice.   Second value %s.\n", optarg);
+				exit(2);
+			}
+			if (mode == MISC && !c.subarray) {
+				pr_err("-N/--name only valid with --update-subarray in misc mode\n");
+				exit(2);
+			}
+			if (strlen(optarg) > 32) {
+				pr_err("name '%s' is too long, 32 chars max.\n",
+					optarg);
+				exit(2);
+			}
+			strcpy(ident.name, optarg);
+			continue;
+
+		case O(ASSEMBLE,'m'): /* super-minor for array */
+		case O(ASSEMBLE,SuperMinor):
+			if (ident.super_minor != UnSet) {
+				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 if (parse_num(&ident.super_minor, optarg) != 0 || 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'):
+			c.readonly = 1;
+			continue;
+
+		case O(ASSEMBLE,'U'): /* update the superblock */
+		case O(MISC,'U'):
+			if (c.update) {
+				pr_err("Can only update one aspect of superblock, both %s and %s given.\n",
+					c.update, optarg);
+				exit(2);
+			}
+			if (mode == MISC && !c.subarray) {
+				pr_err("Only subarrays can be updated in misc mode\n");
+				exit(2);
+			}
+			c.update = optarg;
+			if (strcmp(c.update, "sparc2.2") == 0)
+				continue;
+			if (strcmp(c.update, "super-minor") == 0)
+				continue;
+			if (strcmp(c.update, "summaries") == 0)
+				continue;
+			if (strcmp(c.update, "resync") == 0)
+				continue;
+			if (strcmp(c.update, "uuid") == 0)
+				continue;
+			if (strcmp(c.update, "name") == 0)
+				continue;
+			if (strcmp(c.update, "homehost") == 0)
+				continue;
+			if (strcmp(c.update, "home-cluster") == 0)
+				continue;
+			if (strcmp(c.update, "nodes") == 0)
+				continue;
+			if (strcmp(c.update, "devicesize") == 0)
+				continue;
+			if (strcmp(c.update, "bitmap") == 0)
+				continue;
+			if (strcmp(c.update, "no-bitmap") == 0)
+				continue;
+			if (strcmp(c.update, "bbl") == 0)
+				continue;
+			if (strcmp(c.update, "no-bbl") == 0)
+				continue;
+			if (strcmp(c.update, "force-no-bbl") == 0)
+				continue;
+			if (strcmp(c.update, "ppl") == 0)
+				continue;
+			if (strcmp(c.update, "no-ppl") == 0)
+				continue;
+			if (strcmp(c.update, "metadata") == 0)
+				continue;
+			if (strcmp(c.update, "revert-reshape") == 0)
+				continue;
+			if (strcmp(c.update, "layout-original") == 0 ||
+			    strcmp(c.update, "layout-alternate") == 0 ||
+			    strcmp(c.update, "layout-unspecified") == 0)
+				continue;
+			if (strcmp(c.update, "byteorder") == 0) {
+				if (ss) {
+					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");
+				if (!ss) {
+					pr_err("INTERNAL ERROR cannot find 0.swap\n");
+					exit(2);
+				}
+
+				continue;
+			}
+			if (strcmp(c.update,"?") == 0 ||
+			    strcmp(c.update, "help") == 0) {
+				outf = stdout;
+				fprintf(outf, "%s: ", Name);
+			} else {
+				outf = stderr;
+				fprintf(outf,
+					"%s: '--update=%s' is invalid.  ",
+					Name, c.update);
+			}
+			fprintf(outf, "Valid --update options are:\n"
+		"     'sparc2.2', 'super-minor', 'uuid', 'name', 'nodes', 'resync',\n"
+		"     'summaries', 'homehost', 'home-cluster', 'byteorder', 'devicesize',\n"
+		"     'bitmap', 'no-bitmap', 'metadata', 'revert-reshape'\n"
+		"     'bbl', 'no-bbl', 'force-no-bbl', 'ppl', 'no-ppl'\n"
+		"     'layout-original', 'layout-alternate', 'layout-unspecified'\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 (c.update) {
+				pr_err("Can only update one aspect of superblock, both %s and %s given.\n",
+					c.update, optarg);
+				exit(2);
+			}
+			c.update = optarg;
+			if (strcmp(c.update, "devicesize") != 0 &&
+			    strcmp(c.update, "bbl") != 0 &&
+			    strcmp(c.update, "force-no-bbl") != 0 &&
+			    strcmp(c.update, "no-bbl") != 0) {
+				pr_err("only 'devicesize', 'bbl', 'no-bbl', and 'force-no-bbl' can be updated with --re-add\n");
+				exit(2);
+			}
+			continue;
+
+		case O(INCREMENTAL,NoDegraded):
+			pr_err("--no-degraded is deprecated in Incremental mode\n");
+		case O(ASSEMBLE,NoDegraded): /* --no-degraded */
+			c.runstop = -1; /* --stop isn't allowed for --assemble,
+					 * so we overload slightly */
+			continue;
+
+		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):
+		case O(CREATE,ConfigFile):
+			if (configfile) {
+				pr_err("configfile cannot be set twice.  Second value is %s.\n", optarg);
+				exit(2);
+			}
+			configfile = optarg;
+			set_conffile(configfile);
+			/* FIXME possibly check that config file exists.  Even parse it */
+			continue;
+		case O(ASSEMBLE,'s'): /* scan */
+		case O(MISC,'s'):
+		case O(MONITOR,'s'):
+		case O(INCREMENTAL,'s'):
+			c.scan = 1;
+			continue;
+
+		case O(MONITOR,'m'): /* mail address */
+		case O(MONITOR,EMail):
+			if (mailaddr)
+				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)
+				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):
+			if (parse_num(&increments, optarg) != 0
+				|| increments > 99 || increments < 1) {
+				pr_err("please specify positive integer between 1 and 99 as rebuild increments.\n");
+				exit(2);
+			}
+			continue;
+
+		case O(MONITOR,'d'): /* delay in seconds */
+		case O(GROW, 'd'):
+		case O(BUILD,'d'): /* delay for bitmap updates */
+		case O(CREATE,'d'):
+			if (c.delay)
+				pr_err("only specify delay once. %s ignored.\n", optarg);
+			else if (parse_num(&c.delay, optarg) != 0 || c.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)
+				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 */
+			c.test = 1;
+			continue;
+		case O(MONITOR,'y'): /* log messages to syslog */
+			openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
+			dosyslog = 1;
+			continue;
+		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(GROW,Add):
+		case O(MANAGE,'a'):
+		case O(MANAGE,Add): /* add a drive */
+			devmode = 'a';
+			continue;
+		case O(MANAGE,AddSpare): /* add drive - never re-add */
+			devmode = 'S';
+			continue;
+		case O(MANAGE,AddJournal): /* add journal */
+			if (s.journaldisks && (s.level < 4 || s.level > 6)) {
+				pr_err("--add-journal is only supported for RAID level 4/5/6.\n");
+				exit(2);
+			}
+			devmode = 'j';
+			continue;
+		case O(MANAGE,ReAdd):
+			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(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(MANAGE, ClusterConfirm):
+			devmode = 'c';
+			continue;
+		case O(MANAGE,Replace):
+			/* Mark these devices for replacement */
+			devmode = 'R';
+			continue;
+		case O(MANAGE,With):
+			/* These are the replacements to use */
+			if (devmode != 'R') {
+				pr_err("--with must follow --replace\n");
+				exit(2);
+			}
+			devmode = 'W';
+			continue;
+		case O(INCREMENTAL,'R'):
+		case O(MANAGE,'R'):
+		case O(ASSEMBLE,'R'):
+		case O(BUILD,'R'):
+		case O(CREATE,'R'): /* Run the array */
+			if (c.runstop < 0) {
+				pr_err("Cannot both Stop and Run an array\n");
+				exit(2);
+			}
+			c.runstop = 1;
+			continue;
+		case O(MANAGE,'S'):
+			if (c.runstop > 0) {
+				pr_err("Cannot both Run and Stop an array\n");
+				exit(2);
+			}
+			c.runstop = -1;
+			continue;
+		case O(MANAGE,'t'):
+			c.test = 1;
+			continue;
+
+		case O(MISC,'Q'):
+		case O(MISC,'D'):
+		case O(MISC,'E'):
+		case O(MISC,KillOpt):
+		case O(MISC,'R'):
+		case O(MISC,'S'):
+		case O(MISC,'X'):
+		case O(MISC, ExamineBB):
+		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):
+		case O(MISC, Dump):
+		case O(MISC, Restore):
+		case O(MISC ,Action):
+			if (opt == KillSubarray || opt == UpdateSubarray) {
+				if (c.subarray) {
+					pr_err("subarray can only be specified once\n");
+					exit(2);
+				}
+				c.subarray = optarg;
+			}
+			if (opt == Action) {
+				if (c.action) {
+					pr_err("Only one --action can be specified\n");
+					exit(2);
+				}
+				if (strcmp(optarg, "idle") == 0 ||
+				    strcmp(optarg, "frozen") == 0 ||
+				    strcmp(optarg, "check") == 0 ||
+				    strcmp(optarg, "repair") == 0)
+					c.action = optarg;
+				else {
+					pr_err("action must be one of idle, frozen, check, repair\n");
+					exit(2);
+				}
+			}
+			if (devmode && devmode != opt &&
+			    (devmode == 'E' ||
+			     (opt == 'E' && devmode != 'Q'))) {
+				pr_err("--examine/-E cannot be given with ");
+				if (devmode == 'E') {
+					if (option_index >= 0)
+						fprintf(stderr, "--%s\n",
+							long_options[option_index].name);
+					else
+						fprintf(stderr, "-%c\n", opt);
+				} else if (isalpha(devmode))
+					fprintf(stderr, "-%c\n", devmode);
+				else
+					fprintf(stderr, "previous option\n");
+				exit(2);
+			}
+			devmode = opt;
+			if (opt == Dump || opt == Restore) {
+				if (dump_directory != NULL) {
+					pr_err("dump/restore directory specified twice: %s and %s\n",
+					       dump_directory, optarg);
+					exit(2);
+				}
+				dump_directory = optarg;
+			}
+			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'):
+			c.test = 1;
+			continue;
+
+		case O(MISC, Sparc22):
+			if (devmode != 'E') {
+				pr_err("--sparc2.2 only allowed with --examine\n");
+				exit(2);
+			}
+			c.SparcAdjust = 1;
+			continue;
+
+		case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
+		case O(ASSEMBLE,Bitmap):
+			if (!optarg) {
+				pr_err("bitmap file needed with -b in --assemble mode\n");
+				exit(2);
+			}
+			if (strcmp(optarg, "internal") == 0 ||
+			    strcmp(optarg, "clustered") == 0) {
+				pr_err("no need to specify --bitmap when assembling"
+					" arrays with internal or clustered bitmap\n");
+				continue;
+			}
+			bitmap_fd = open(optarg, O_RDWR);
+			if (!*optarg || bitmap_fd < 0) {
+				pr_err("cannot open bitmap file %s: %s\n", optarg, strerror(errno));
+				exit(2);
+			}
+			ident.bitmap_fd = bitmap_fd; /* for Assemble */
+			continue;
+
+		case O(ASSEMBLE, BackupFile):
+		case O(GROW, BackupFile):
+			/* Specify a file into which grow might place a backup,
+			 * or from which assemble might recover a backup
+			 */
+			if (c.backup_file) {
+				pr_err("backup file already specified, rejecting %s\n", optarg);
+				exit(2);
+			}
+			c.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
+			 */
+			c.invalid_backup = 1;
+			continue;
+
+		case O(BUILD,'b'):
+		case O(BUILD,Bitmap):
+		case O(CREATE,'b'):
+		case O(CREATE,Bitmap): /* here we create the bitmap */
+		case O(GROW,'b'):
+		case O(GROW,Bitmap):
+			if (s.bitmap_file) {
+				pr_err("bitmap cannot be set twice. Second value: %s.\n", optarg);
+				exit(2);
+			}
+			if (strcmp(optarg, "internal") == 0 ||
+			    strcmp(optarg, "none") == 0 ||
+			    strchr(optarg, '/') != NULL) {
+				s.bitmap_file = optarg;
+				continue;
+			}
+			if (strcmp(optarg, "clustered") == 0) {
+				s.bitmap_file = optarg;
+				/* Set the default number of cluster nodes
+				 * to 4 if not already set by user
+				 */
+				if (c.nodes < 1)
+					c.nodes = 4;
+				continue;
+			}
+			/* probable typo */
+			pr_err("bitmap file must contain a '/', or be 'internal', or be 'clustered', or 'none'\n"
+				"       not '%s'\n", optarg);
+			exit(2);
+
+		case O(GROW,BitmapChunk):
+		case O(BUILD,BitmapChunk):
+		case O(CREATE,BitmapChunk): /* bitmap chunksize */
+			s.bitmap_chunk = parse_size(optarg);
+			if (s.bitmap_chunk == 0 ||
+			    s.bitmap_chunk == INVALID_SECTORS ||
+			    s.bitmap_chunk & (s.bitmap_chunk - 1)) {
+				pr_err("invalid bitmap chunksize: %s\n",
+				       optarg);
+				exit(2);
+			}
+			s.bitmap_chunk = s.bitmap_chunk * 512;
+			continue;
+
+		case O(GROW, WriteBehind):
+		case O(BUILD, WriteBehind):
+		case O(CREATE, WriteBehind):
+			s.write_behind = DEFAULT_MAX_WRITE_BEHIND;
+			if (parse_num(&s.write_behind, optarg) != 0 ||
+			s.write_behind < 0 || s.write_behind > 16383) {
+				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):
+			remove_path = optarg;
+			continue;
+		case O(CREATE, WriteJournal):
+			if (s.journaldisks) {
+				pr_err("Please specify only one journal device for the array.\n");
+				pr_err("Ignoring --write-journal %s...\n", optarg);
+				continue;
+			}
+			dv = xmalloc(sizeof(*dv));
+			dv->devname = optarg;
+			dv->disposition = 'j';  /* WriteJournal */
+			dv->used = 0;
+			dv->next = NULL;
+			*devlistend = dv;
+			devlistend = &dv->next;
+			devs_found++;
+
+			s.journaldisks = 1;
+			continue;
+		case O(CREATE, 'k'):
+		case O(GROW, 'k'):
+			s.consistency_policy = map_name(consistency_policies,
+							optarg);
+			if (s.consistency_policy < CONSISTENCY_POLICY_RESYNC) {
+				pr_err("Invalid consistency policy: %s\n",
+				       optarg);
+				exit(2);
+			}
+			continue;
+		}
+		/* We have now processed all the valid options. Anything else is
+		 * an error
+		 */
+		if (option_index > 0)
+			pr_err(":option --%s not valid in %s mode\n",
+				long_options[option_index].name,
+				map_num(modes, mode));
+		else
+			pr_err("option -%c not valid in %s mode\n",
+				opt, map_num(modes, mode));
+		exit(2);
+
+	}
+
+	if (print_help) {
+		char *help_text;
+		if (print_help == 2)
+			help_text = OptionHelp;
+		else
+			help_text = mode_help[mode];
+		if (help_text == NULL)
+			help_text = Help;
+		fputs(help_text,stdout);
+		exit(0);
+	}
+
+	if (s.journaldisks) {
+		if (s.level < 4 || s.level > 6) {
+			pr_err("--write-journal is only supported for RAID level 4/5/6.\n");
+			exit(2);
+		}
+		if (s.consistency_policy != CONSISTENCY_POLICY_UNKNOWN &&
+		    s.consistency_policy != CONSISTENCY_POLICY_JOURNAL) {
+			pr_err("--write-journal is not supported with consistency policy: %s\n",
+			       map_num(consistency_policies, s.consistency_policy));
+			exit(2);
+		}
+	}
+
+	if (mode == CREATE &&
+	    s.consistency_policy != CONSISTENCY_POLICY_UNKNOWN) {
+		if (s.level <= 0) {
+			pr_err("--consistency-policy not meaningful with level %s.\n",
+			       map_num(pers, s.level));
+			exit(2);
+		} else if (s.consistency_policy == CONSISTENCY_POLICY_JOURNAL &&
+			   !s.journaldisks) {
+			pr_err("--write-journal is required for consistency policy: %s\n",
+			       map_num(consistency_policies, s.consistency_policy));
+			exit(2);
+		} else if (s.consistency_policy == CONSISTENCY_POLICY_PPL &&
+			   s.level != 5) {
+			pr_err("PPL consistency policy is only supported for RAID level 5.\n");
+			exit(2);
+		} else if (s.consistency_policy == CONSISTENCY_POLICY_BITMAP &&
+			   (!s.bitmap_file ||
+			    strcmp(s.bitmap_file, "none") == 0)) {
+			pr_err("--bitmap is required for consistency policy: %s\n",
+			       map_num(consistency_policies, s.consistency_policy));
+			exit(2);
+		} else if (s.bitmap_file &&
+			   strcmp(s.bitmap_file, "none") != 0 &&
+			   s.consistency_policy != CONSISTENCY_POLICY_BITMAP &&
+			   s.consistency_policy != CONSISTENCY_POLICY_JOURNAL) {
+			pr_err("--bitmap is not compatible with consistency policy: %s\n",
+			       map_num(consistency_policies, s.consistency_policy));
+			exit(2);
+		}
+	}
+
+	if (!mode && devs_found) {
+		mode = MISC;
+		devmode = 'Q';
+		if (devlist->disposition == 0)
+			devlist->disposition = devmode;
+	}
+	if (!mode) {
+		fputs(Usage, stderr);
+		exit(2);
+	}
+
+	if (symlinks) {
+		struct createinfo *ci = conf_get_create_info();
+
+		if (strcasecmp(symlinks, "yes") == 0)
+			ci->symlinks = 1;
+		else if (strcasecmp(symlinks, "no") == 0)
+			ci->symlinks = 0;
+		else {
+			pr_err("option --symlinks must be 'no' or 'yes'\n");
+			exit(2);
+		}
+	}
+	/* Ok, got the option parsing out of the way
+	 * hopefully it's mostly right but there might be some stuff
+	 * missing
+	 *
+	 * That is mostly 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.
+	 */
+
+	if (mode == MANAGE || mode == BUILD || mode == CREATE ||
+	    mode == GROW || (mode == ASSEMBLE && ! c.scan)) {
+		if (devs_found < 1) {
+			pr_err("an md device must be given in this mode\n");
+			exit(2);
+		}
+		if ((int)ident.super_minor == -2 && c.autof) {
+			pr_err("--super-minor=dev is incompatible with --auto\n");
+			exit(2);
+		}
+		if (mode == MANAGE || mode == GROW) {
+			mdfd = open_mddev(devlist->devname, 1);
+			if (mdfd < 0)
+				exit(1);
+		} else {
+			char *bname = basename(devlist->devname);
+
+			if (strlen(bname) > MD_NAME_MAX) {
+				pr_err("Name %s is too long.\n", devlist->devname);
+				exit(1);
+			}
+			/* non-existent device is OK */
+			mdfd = open_mddev(devlist->devname, 0);
+		}
+		if (mdfd == -2) {
+			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) {
+				pr_err("--super-minor=dev given, and listed device %s doesn't exist.\n",
+					devlist->devname);
+				exit(1);
+			}
+			fstat(mdfd, &stb);
+			ident.super_minor = minor(stb.st_rdev);
+		}
+		if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
+			/* We don't really want this open yet, we just might
+			 * have wanted to check some things
+			 */
+			close(mdfd);
+			mdfd = -1;
+		}
+	}
+
+	if (s.raiddisks) {
+		if (s.raiddisks == 1 &&  !c.force && s.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 (c.homehost == NULL && c.require_homehost)
+		c.homehost = conf_get_homehost(&c.require_homehost);
+	if (c.homehost == NULL || strcasecmp(c.homehost, "<system>") == 0) {
+		if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
+			sys_hostname[sizeof(sys_hostname)-1] = 0;
+			c.homehost = sys_hostname;
+		}
+	}
+	if (c.homehost &&
+	    (!c.homehost[0] || strcasecmp(c.homehost, "<none>") == 0)) {
+		c.homehost = NULL;
+		c.require_homehost = 0;
+	}
+
+	rv = 0;
+
+	set_hooks(); /* set hooks from libs */
+
+	if (c.homecluster == NULL && (c.nodes > 0)) {
+		c.homecluster = conf_get_homecluster();
+		if (c.homecluster == NULL)
+			rv = get_cluster_name(&c.homecluster);
+		if (rv) {
+			pr_err("The md can't get cluster name\n");
+			exit(1);
+		}
+	}
+
+	if (c.update && strcmp(c.update, "nodes") == 0 && c.nodes == 0) {
+		pr_err("Please specify nodes number with --nodes\n");
+		exit(1);
+	}
+
+	if (c.backup_file && data_offset != INVALID_SECTORS) {
+		pr_err("--backup-file and --data-offset are incompatible\n");
+		exit(2);
+	}
+
+	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);
+	}
+
+	ident.autof = c.autof;
+
+	if (c.scan && c.verbose < 2)
+		/* --scan implied --brief unless -vv */
+		c.brief = 1;
+
+	if (mode == CREATE) {
+		if (s.bitmap_file && strcmp(s.bitmap_file, "clustered") == 0) {
+			locked = cluster_get_dlmlock();
+			if (locked != 1)
+				exit(1);
+		}
+	} else if (mode == MANAGE || mode == GROW || mode == INCREMENTAL) {
+		if (!md_get_array_info(mdfd, &array) && (devmode != 'c')) {
+			if (array.state & (1 << MD_SB_CLUSTERED)) {
+				locked = cluster_get_dlmlock();
+				if (locked != 1)
+					exit(1);
+			}
+		}
+	}
+
+	switch(mode) {
+	case MANAGE:
+		/* readonly, add/remove, readwrite, runstop */
+		if (c.readonly > 0)
+			rv = Manage_ro(devlist->devname, mdfd, c.readonly);
+		if (!rv && devs_found>1)
+			rv = Manage_subdevs(devlist->devname, mdfd,
+					    devlist->next, c.verbose, c.test,
+					    c.update, c.force);
+		if (!rv && c.readonly < 0)
+			rv = Manage_ro(devlist->devname, mdfd, c.readonly);
+		if (!rv && c.runstop > 0)
+			rv = Manage_run(devlist->devname, mdfd, &c);
+		if (!rv && c.runstop < 0)
+			rv = Manage_stop(devlist->devname, mdfd, c.verbose, 0);
+		break;
+	case ASSEMBLE:
+		if (!c.scan && c.runstop == -1) {
+			pr_err("--no-degraded not meaningful without a --scan assembly.\n");
+			exit(1);
+		} else if (devs_found == 1 && ident.uuid_set == 0 &&
+			   ident.super_minor == UnSet && ident.name[0] == 0 &&
+			   !c.scan) {
+			/* 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) {
+				pr_err("%s not identified in config file.\n",
+					devlist->devname);
+				rv |= 1;
+				if (mdfd >= 0)
+					close(mdfd);
+			} else {
+				if (array_ident->autof == 0)
+					array_ident->autof = c.autof;
+				rv |= Assemble(ss, devlist->devname, array_ident,
+					       NULL, &c);
+			}
+		} else if (!c.scan)
+			rv = Assemble(ss, devlist->devname, &ident,
+				      devlist->next, &c);
+		else if (devs_found > 0) {
+			if (c.update && devs_found > 1) {
+				pr_err("can only update a single array at a time\n");
+				exit(1);
+			}
+			if (c.backup_file && devs_found > 1) {
+				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) {
+					pr_err("%s not identified in config file.\n",
+						dv->devname);
+					rv |= 1;
+					continue;
+				}
+				if (array_ident->autof == 0)
+					array_ident->autof = c.autof;
+				rv |= Assemble(ss, dv->devname, array_ident,
+					       NULL, &c);
+			}
+		} else {
+			if (c.update) {
+				pr_err("--update not meaningful with a --scan assembly.\n");
+				exit(1);
+			}
+			if (c.backup_file) {
+				pr_err("--backup_file not meaningful with a --scan assembly.\n");
+				exit(1);
+			}
+			rv = scan_assemble(ss, &c, &ident);
+		}
+
+		break;
+	case BUILD:
+		if (c.delay == 0)
+			c.delay = DEFAULT_BITMAP_DELAY;
+		if (s.write_behind && !s.bitmap_file) {
+			pr_err("write-behind mode requires a bitmap.\n");
+			rv = 1;
+			break;
+		}
+		if (s.raiddisks == 0) {
+			pr_err("no raid-devices specified.\n");
+			rv = 1;
+			break;
+		}
+
+		if (s.bitmap_file) {
+			if (strcmp(s.bitmap_file, "internal") == 0 ||
+			    strcmp(s.bitmap_file, "clustered") == 0) {
+				pr_err("'internal' and 'clustered' bitmaps not supported with --build\n");
+				rv |= 1;
+				break;
+			}
+		}
+		rv = Build(devlist->devname, devlist->next, &s, &c);
+		break;
+	case CREATE:
+		if (c.delay == 0)
+			c.delay = DEFAULT_BITMAP_DELAY;
+
+		if (c.nodes) {
+			if (!s.bitmap_file ||
+			    strcmp(s.bitmap_file, "clustered") != 0) {
+				pr_err("--nodes argument only compatible with --bitmap=clustered\n");
+				rv = 1;
+				break;
+			}
+
+			if (s.level != 1 && s.level != 10) {
+				pr_err("--bitmap=clustered is currently supported with raid1/10 only\n");
+				rv = 1;
+				break;
+			}
+			if (s.level == 10 && !(is_near_layout_10(s.layout) || s.layout == UnSet)) {
+				pr_err("only near layout is supported with clustered raid10\n");
+				rv = 1;
+				break;
+			}
+		}
+
+		if (s.write_behind && !s.bitmap_file) {
+			pr_err("write-behind mode requires a bitmap.\n");
+			rv = 1;
+			break;
+		}
+		if (s.raiddisks == 0) {
+			pr_err("no raid-devices specified.\n");
+			rv = 1;
+			break;
+		}
+
+		rv = Create(ss, devlist->devname,
+			    ident.name, ident.uuid_set ? ident.uuid : NULL,
+			    devs_found-1, devlist->next,
+			    &s, &c, data_offset);
+		break;
+	case MISC:
+		if (devmode == 'E') {
+			if (devlist == NULL && !c.scan) {
+				pr_err("No devices to examine\n");
+				exit(2);
+			}
+			if (devlist == NULL)
+				devlist = conf_get_devs();
+			if (devlist == NULL) {
+				pr_err("No devices listed in %s\n", configfile?configfile:DefaultConfFile);
+				exit(1);
+			}
+			rv = Examine(devlist, &c, ss);
+		} else if (devmode == DetailPlatform) {
+			rv = Detail_Platform(ss ? ss->ss : NULL, ss ? c.scan : 1,
+					     c.verbose, c.export,
+					     devlist ? devlist->devname : NULL);
+		} else if (devlist == NULL) {
+			if (devmode == 'S' && c.scan)
+				rv = stop_scan(c.verbose);
+			else if ((devmode == 'D' || devmode == Waitclean) &&
+				 c.scan)
+				rv = misc_scan(devmode, &c);
+			else if (devmode == UdevRules)
+				rv = Write_rules(udev_filename);
+			else {
+				pr_err("No devices given.\n");
+				exit(2);
+			}
+		} else
+			rv = misc_list(devlist, &ident, dump_directory, ss, &c);
+		break;
+	case MONITOR:
+		if (!devlist && !c.scan) {
+			pr_err("Cannot monitor: need --scan or at least one device\n");
+			rv = 1;
+			break;
+		}
+		if (pidfile && !daemonise) {
+			pr_err("Cannot write a pid file when not in daemon mode\n");
+			rv = 1;
+			break;
+		}
+		if (c.delay == 0) {
+			c.delay = conf_get_monitor_delay();
+			if (!c.delay)
+				c.delay = 60;
+		}
+		rv = Monitor(devlist, mailaddr, program,
+			     &c, daemonise, oneshot,
+			     dosyslog, pidfile, increments,
+			     spare_sharing);
+		break;
+
+	case GROW:
+		if (array_size > 0) {
+			/* alway impose array size first, independent of
+			 * anything else
+			 * Do not allow level or raid_disks changes at the
+			 * same time as that can be irreversibly destructive.
+			 */
+			struct mdinfo sra;
+			int err;
+			if (s.raiddisks || s.level != UnSet) {
+				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;
+				break;
+			}
+			if (sysfs_init(&sra, mdfd, NULL)) {
+				rv = 1;
+				break;
+			}
+			if (array_size == MAX_SIZE)
+				err = sysfs_set_str(&sra, NULL, "array_size", "default");
+			else
+				err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
+			if (err < 0) {
+				if (errno == E2BIG)
+					pr_err("--array-size setting is too large.\n");
+				else
+					pr_err("current kernel does not support setting --array-size\n");
+				rv = 1;
+				break;
+			}
+		}
+		if (devs_found > 1 && s.raiddisks == 0 && s.level == UnSet) {
+			/* must be '-a'. */
+			if (s.size > 0 || s.chunk ||
+			    s.layout_str || s.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);
+				if (rv)
+					break;
+			}
+		} else if (s.bitmap_file) {
+			if (s.size > 0 || s.raiddisks || s.chunk ||
+			    s.layout_str || devs_found > 1) {
+				pr_err("--bitmap changes cannot be used with other geometry changes in --grow mode\n");
+				rv = 1;
+				break;
+			}
+			if (c.delay == 0)
+				c.delay = DEFAULT_BITMAP_DELAY;
+			rv = Grow_addbitmap(devlist->devname, mdfd, &c, &s);
+		} else if (grow_continue)
+			rv = Grow_continue_command(devlist->devname,
+						   mdfd, c.backup_file,
+						   c.verbose);
+		else if (s.size > 0 || s.raiddisks || s.layout_str ||
+			 s.chunk != 0 || s.level != UnSet ||
+			 data_offset != INVALID_SECTORS) {
+			rv = Grow_reshape(devlist->devname, mdfd,
+					  devlist->next,
+					  data_offset, &c, &s);
+		} else if (s.consistency_policy != CONSISTENCY_POLICY_UNKNOWN) {
+			rv = Grow_consistency_policy(devlist->devname, mdfd, &c, &s);
+		} else if (array_size == 0)
+			pr_err("no changes to --grow\n");
+		break;
+	case INCREMENTAL:
+		if (rebuild_map) {
+			RebuildMap();
+		}
+		if (c.scan) {
+			rv = 1;
+			if (devlist) {
+				pr_err("In --incremental mode, a device cannot be given with --scan.\n");
+				break;
+			}
+			if (c.runstop <= 0) {
+				pr_err("--incremental --scan meaningless without --run.\n");
+				break;
+			}
+			if (devmode == 'f') {
+				pr_err("--incremental --scan --fail not supported.\n");
+				break;
+			}
+			rv = IncrementalScan(&c, NULL);
+		}
+		if (!devlist) {
+			if (!rebuild_map && !c.scan) {
+				pr_err("--incremental requires a device.\n");
+				rv = 1;
+			}
+			break;
+		}
+		if (devmode == 'f') {
+			if (devlist->next) {
+				pr_err("'--incremental --fail' can only handle one device.\n");
+				rv = 1;
+				break;
+			}
+			rv = IncrementalRemove(devlist->devname, remove_path,
+					       c.verbose);
+		} else
+			rv = Incremental(devlist, &c, ss);
+		break;
+	case AUTODETECT:
+		autodetect();
+		break;
+	}
+	if (locked)
+		cluster_release_dlmlock();
+	close_fd(&mdfd);
+	exit(rv);
+}
+
+static int scan_assemble(struct supertype *ss,
+			 struct context *c,
+			 struct mddev_ident *ident)
+{
+	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 = c->autof;
+	}
+	if (map_lock(&map))
+		pr_err("failed to get exclusive lock on mapfile\n");
+	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, c);
+			if (r == 0) {
+				a->assembled = 1;
+				successes++;
+			} else
+				failures++;
+			rv |= r;
+			cnt++;
+		}
+	} while (failures && successes);
+	if (c->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 = c->autof;
+		do {
+			struct mddev_dev *devlist = conf_get_devs();
+			acnt = 0;
+			do {
+				rv2 = Assemble(ss, NULL,
+					       ident,
+					       devlist, c);
+				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, struct context *c)
+{
+	/* 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 rv = 0;
+
+	for (members = 0; members <= 1; members++) {
+		for (e = ms; e; e = e->next) {
+			char *name = NULL;
+			struct map_ent *me;
+			struct stat stb;
+			int member = e->metadata_version &&
+				strncmp(e->metadata_version,
+					"external:/", 10) == 0;
+			if (members != member)
+				continue;
+			me = map_by_devnm(&map, e->devnm);
+			if (me && me->path && strcmp(me->path, "/unknown") != 0)
+				name = me->path;
+			if (name == NULL || stat(name, &stb) != 0)
+				name = get_md_name(e->devnm);
+
+			if (!name) {
+				pr_err("cannot find device file for %s\n",
+					e->devnm);
+				continue;
+			}
+			if (devmode == 'D')
+				rv |= Detail(name, c);
+			else
+				rv |= WaitClean(name, c->verbose);
+			put_md_name(name);
+			map_free(map);
+			map = NULL;
+		}
+	}
+	free_mdstat(ms);
+	return rv;
+}
+
+static int stop_scan(int verbose)
+{
+	/* 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->devnm);
+			int mdfd;
+
+			if (!name) {
+				pr_err("cannot find device file for %s\n",
+					e->devnm);
+				continue;
+			}
+			mdfd = open_mddev(name, 1);
+			if (mdfd >= 0) {
+				if (Manage_stop(name, mdfd, verbose, !last))
+					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,
+		     struct mddev_ident *ident,
+		     char *dump_directory,
+		     struct supertype *ss, struct context *c)
+{
+	struct mddev_dev *dv;
+	int rv = 0;
+
+	for (dv = devlist; dv; dv = (rv & 16) ? NULL : dv->next) {
+		int mdfd = -1;
+
+		switch(dv->disposition) {
+		case 'D':
+			rv |= Detail(dv->devname, c);
+			continue;
+		case KillOpt: /* Zero superblock */
+			if (ss)
+				rv |= Kill(dv->devname, ss, c->force, c->verbose,0);
+			else {
+				int v = c->verbose;
+				do {
+					rv |= Kill(dv->devname, NULL, c->force, v, 0);
+					v = -1;
+				} while (rv == 0);
+				rv &= ~4;
+			}
+			continue;
+		case 'Q':
+			rv |= Query(dv->devname);
+			continue;
+		case 'X':
+			rv |= ExamineBitmap(dv->devname, c->brief, ss);
+			continue;
+		case ExamineBB:
+			rv |= ExamineBadblocks(dv->devname, c->brief, ss);
+			continue;
+		case 'W':
+		case WaitOpt:
+			rv |= Wait(dv->devname);
+			continue;
+		case Waitclean:
+			rv |= WaitClean(dv->devname, c->verbose);
+			continue;
+		case KillSubarray:
+			rv |= Kill_subarray(dv->devname, c->subarray, c->verbose);
+			continue;
+		case UpdateSubarray:
+			if (c->update == NULL) {
+				pr_err("-U/--update must be specified with --update-subarray\n");
+				rv |= 1;
+				continue;
+			}
+			rv |= Update_subarray(dv->devname, c->subarray,
+					      c->update, ident, c->verbose);
+			continue;
+		case Dump:
+			rv |= Dump_metadata(dv->devname, dump_directory, c, ss);
+			continue;
+		case Restore:
+			rv |= Restore_metadata(dv->devname, dump_directory, c, ss,
+					       (dv == devlist && dv->next == NULL));
+			continue;
+		case Action:
+			rv |= SetAction(dv->devname, c->action);
+			continue;
+		}
+
+		if (dv->devname[0] != '/')
+			mdfd = open_dev(dv->devname);
+		if (dv->devname[0] == '/' || mdfd < 0)
+			mdfd = open_mddev(dv->devname, 1);
+
+		if (mdfd >= 0) {
+			switch(dv->disposition) {
+			case 'R':
+				c->runstop = 1;
+				rv |= Manage_run(dv->devname, mdfd, c);
+				break;
+			case 'S':
+				if (c->scan) {
+					pr_err("--stop not meaningful with both a --scan assembly and a device name.\n");
+					rv |= 1;
+					break;
+				}
+				rv |= Manage_stop(dv->devname, mdfd, c->verbose, 0);
+				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;
+}
+
+int SetAction(char *dev, char *action)
+{
+	int fd = open(dev, O_RDONLY);
+	struct mdinfo mdi;
+	int retval;
+
+	if (fd < 0) {
+		pr_err("Couldn't open %s: %s\n", dev, strerror(errno));
+		return 1;
+	}
+	retval = sysfs_init(&mdi, fd, NULL);
+	close(fd);
+	if (retval) {
+		pr_err("%s is no an md array\n", dev);
+		return 1;
+	}
+
+	if (sysfs_set_str(&mdi, NULL, "sync_action", action) < 0) {
+		pr_err("Count not set action for %s to %s: %s\n",
+		       dev, action, strerror(errno));
+		return 1;
+	}
+	return 0;
+}