Adding upstream version 4.2.upstream/4.2

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

1 files changed, 879 insertions, 0 deletions

diff --git a/Detail.c b/Detail.c
new file mode 100644
index 0000000..95d4cc7
--- /dev/null
+++ b/Detail.c
@@ -0,0 +1,879 @@
+/*
+ * 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>
+ */
+
+#include	"mdadm.h"
+#include	"md_p.h"
+#include	"md_u.h"
+#include	<ctype.h>
+#include	<dirent.h>
+
+static int cmpstringp(const void *p1, const void *p2)
+{
+	return strcmp(* (char * const *) p1, * (char * const *) p2);
+}
+
+static int add_device(const char *dev, char ***p_devices,
+		      int *p_max_devices, int n_devices)
+{
+	if (n_devices + 1 >= *p_max_devices) {
+		*p_max_devices += 16;
+		*p_devices = xrealloc(*p_devices, *p_max_devices *
+				      sizeof(**p_devices));
+		if (!*p_devices) {
+			*p_max_devices = 0;
+			return 0;
+		}
+	};
+	(*p_devices)[n_devices] = xstrdup(dev);
+	return n_devices + 1;
+}
+
+int Detail(char *dev, struct context *c)
+{
+	/*
+	 * Print out details for an md array
+	 */
+	int fd = open(dev, O_RDONLY);
+	mdu_array_info_t array;
+	mdu_disk_info_t *disks = NULL;
+	int next;
+	int d;
+	time_t atime;
+	char *str;
+	char **devices = NULL;
+	int max_devices = 0, n_devices = 0;
+	int spares = 0;
+	struct stat stb;
+	int failed = 0;
+	struct supertype *st = NULL;
+	char *subarray = NULL;
+	int max_disks = MD_SB_DISKS; /* just a default */
+	struct mdinfo *info = NULL;
+	struct mdinfo *sra = NULL;
+	struct mdinfo *subdev;
+	char *member = NULL;
+	char *container = NULL;
+
+	int rv = c->test ? 4 : 1;
+	int avail_disks = 0;
+	char *avail = NULL;
+	int external;
+	int inactive;
+	int is_container = 0;
+	char *arrayst;
+
+	if (fd < 0) {
+		pr_err("cannot open %s: %s\n",
+			dev, strerror(errno));
+		return rv;
+	}
+	sra = sysfs_read(fd, NULL, GET_VERSION | GET_DEVS |
+			GET_ARRAY_STATE | GET_STATE);
+	if (!sra) {
+		if (md_get_array_info(fd, &array)) {
+			pr_err("%s does not appear to be an md device\n", dev);
+			goto out;
+		}
+	}
+	external = (sra != NULL && sra->array.major_version == -1 &&
+		    sra->array.minor_version == -2);
+	inactive = (sra != NULL && !md_array_is_active(sra));
+	st = super_by_fd(fd, &subarray);
+	if (md_get_array_info(fd, &array)) {
+		if (errno == ENODEV) {
+			if (sra->array.major_version == -1 &&
+			    sra->array.minor_version == -1 &&
+			    sra->devs == NULL) {
+				pr_err("Array associated with md device %s does not exist.\n",
+				       dev);
+				goto out;
+			}
+			array = sra->array;
+		} else {
+			pr_err("cannot get array detail for %s: %s\n",
+			       dev, strerror(errno));
+			goto out;
+		}
+	}
+
+	if (array.raid_disks == 0 && external)
+		is_container = 1;
+	if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
+		stb.st_rdev = 0;
+	rv = 0;
+
+	if (st)
+		max_disks = st->max_devs;
+
+	if (subarray) {
+		/* This is a subarray of some container.
+		 * We want the name of the container, and the member
+		 */
+		dev_t devid = devnm2devid(st->container_devnm);
+		int cfd, err;
+
+		member = subarray;
+		container = map_dev_preferred(major(devid), minor(devid),
+					      1, c->prefer);
+		cfd = open_dev(st->container_devnm);
+		if (cfd >= 0) {
+			err = st->ss->load_container(st, cfd, NULL);
+			close(cfd);
+			if (err == 0)
+				info = st->ss->container_content(st, subarray);
+		}
+	}
+
+	/* try to load a superblock. Try sra->devs first, then try ioctl */
+	if (st && !info)
+		for (d = 0, subdev = sra ? sra->devs : NULL;
+		     d < max_disks || subdev;
+		     subdev ? (void)(subdev = subdev->next) : (void)(d++)){
+		mdu_disk_info_t disk;
+		char *dv;
+		int fd2;
+		int err;
+
+		if (subdev)
+			disk = subdev->disk;
+		else {
+			disk.number = d;
+			if (md_get_disk_info(fd, &disk) < 0)
+				continue;
+			if (d >= array.raid_disks &&
+			    disk.major == 0 && disk.minor == 0)
+				continue;
+		}
+
+		if (array.raid_disks > 0 &&
+		    (disk.state & (1 << MD_DISK_ACTIVE)) == 0)
+			continue;
+
+		dv = map_dev(disk.major, disk.minor, 1);
+		if (!dv)
+			continue;
+
+		fd2 = dev_open(dv, O_RDONLY);
+		if (fd2 < 0)
+			continue;
+
+		if (st->sb)
+			st->ss->free_super(st);
+
+		err = st->ss->load_super(st, fd2, NULL);
+		close(fd2);
+		if (err)
+			continue;
+		if (info)
+			free(info);
+		if (subarray)
+			info = st->ss->container_content(st, subarray);
+		else {
+			info = xmalloc(sizeof(*info));
+			st->ss->getinfo_super(st, info, NULL);
+		}
+		if (!info)
+			continue;
+
+		if (array.raid_disks != 0 && /* container */
+		    (info->array.ctime != array.ctime ||
+		     info->array.level != array.level)) {
+			st->ss->free_super(st);
+			continue;
+		}
+		/* some formats (imsm) have free-floating-spares
+		 * with a uuid of uuid_zero, they don't
+		 * have very good info about the rest of the
+		 * container, so keep searching when
+		 * encountering such a device.  Otherwise, stop
+		 * after the first successful call to
+		 * ->load_super.
+		 */
+		if (memcmp(uuid_zero,
+			   info->uuid,
+			   sizeof(uuid_zero)) == 0) {
+			st->ss->free_super(st);
+			continue;
+		}
+		break;
+	}
+
+	/* Ok, we have some info to print... */
+	if (inactive && info)
+		str = map_num(pers, info->array.level);
+	else
+		str = map_num(pers, array.level);
+
+	if (c->export) {
+		if (array.raid_disks) {
+			if (str)
+				printf("MD_LEVEL=%s\n", str);
+			printf("MD_DEVICES=%d\n", array.raid_disks);
+		} else {
+			if (is_container)
+				printf("MD_LEVEL=container\n");
+			printf("MD_DEVICES=%d\n", array.nr_disks);
+		}
+		if (container) {
+			printf("MD_CONTAINER=%s\n", container);
+			printf("MD_MEMBER=%s\n", member);
+		} else {
+			if (sra && sra->array.major_version < 0)
+				printf("MD_METADATA=%s\n", sra->text_version);
+			else
+				printf("MD_METADATA=%d.%d\n",
+				       array.major_version,
+				       array.minor_version);
+		}
+
+		if (st && st->sb && info) {
+			char nbuf[64];
+			struct map_ent *mp, *map = NULL;
+
+			fname_from_uuid(st, info, nbuf, ':');
+			printf("MD_UUID=%s\n", nbuf + 5);
+			mp = map_by_uuid(&map, info->uuid);
+			if (mp && mp->path &&
+			    strncmp(mp->path, "/dev/md/", 8) == 0) {
+				printf("MD_DEVNAME=");
+				print_escape(mp->path + 8);
+				putchar('\n');
+			}
+
+			if (st->ss->export_detail_super)
+				st->ss->export_detail_super(st);
+			map_free(map);
+		} else {
+			struct map_ent *mp, *map = NULL;
+			char nbuf[64];
+			mp = map_by_devnm(&map, fd2devnm(fd));
+			if (mp) {
+				__fname_from_uuid(mp->uuid, 0, nbuf, ':');
+				printf("MD_UUID=%s\n", nbuf+5);
+			}
+			if (mp && mp->path &&
+			    strncmp(mp->path, "/dev/md/", 8) == 0) {
+				printf("MD_DEVNAME=");
+				print_escape(mp->path+8);
+				putchar('\n');
+			}
+			map_free(map);
+		}
+		if (!c->no_devices && sra) {
+			struct mdinfo *mdi;
+			for (mdi  = sra->devs; mdi; mdi = mdi->next) {
+				char *path;
+				char *sysdev = xstrdup(mdi->sys_name);
+				char *cp;
+
+				path = map_dev(mdi->disk.major,
+					       mdi->disk.minor, 0);
+				for (cp = sysdev; *cp; cp++)
+					if (!isalnum(*cp))
+						*cp = '_';
+
+				if (mdi->disk.raid_disk >= 0)
+					printf("MD_DEVICE_%s_ROLE=%d\n",
+					       sysdev,
+					       mdi->disk.raid_disk);
+				else
+					printf("MD_DEVICE_%s_ROLE=spare\n",
+					       sysdev);
+				if (path)
+					printf("MD_DEVICE_%s_DEV=%s\n",
+					       sysdev, path);
+			}
+		}
+		goto out;
+	}
+
+	disks = xmalloc(max_disks * 2 * sizeof(mdu_disk_info_t));
+	for (d = 0; d < max_disks * 2; d++) {
+		disks[d].state = (1 << MD_DISK_REMOVED);
+		disks[d].major = disks[d].minor = 0;
+		disks[d].number = -1;
+		disks[d].raid_disk = d / 2;
+	}
+
+	next = array.raid_disks * 2;
+	if (inactive) {
+		struct mdinfo *mdi;
+		for (mdi = sra->devs; mdi; mdi = mdi->next) {
+			disks[next++] = mdi->disk;
+			disks[next - 1].number = -1;
+		}
+	} else for (d = 0; d < max_disks; d++) {
+		mdu_disk_info_t disk;
+		disk.number = d;
+		if (md_get_disk_info(fd, &disk) < 0) {
+			if (d < array.raid_disks)
+				pr_err("cannot get device detail for device %d: %s\n",
+					d, strerror(errno));
+			continue;
+		}
+		if (disk.major == 0 && disk.minor == 0)
+			continue;
+		if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks &&
+		    disks[disk.raid_disk * 2].state == (1 << MD_DISK_REMOVED) &&
+		    ((disk.state & (1 << MD_DISK_JOURNAL)) == 0))
+			disks[disk.raid_disk * 2] = disk;
+		else if (disk.raid_disk >= 0 &&
+			 disk.raid_disk < array.raid_disks &&
+			 disks[disk.raid_disk * 2 + 1].state ==
+			 (1 << MD_DISK_REMOVED) &&
+			 !(disk.state & (1 << MD_DISK_JOURNAL)))
+			disks[disk.raid_disk * 2 + 1] = disk;
+		else if (next < max_disks * 2)
+			disks[next++] = disk;
+	}
+
+	avail = xcalloc(array.raid_disks, 1);
+
+	for (d = 0; d < array.raid_disks; d++) {
+		char dv[PATH_MAX], dv_rep[PATH_MAX];
+		snprintf(dv, PATH_MAX, "/sys/dev/block/%d:%d",
+			disks[d*2].major, disks[d*2].minor);
+		snprintf(dv_rep, PATH_MAX, "/sys/dev/block/%d:%d",
+			disks[d*2+1].major, disks[d*2+1].minor);
+
+		if ((is_dev_alive(dv) && (disks[d*2].state & (1<<MD_DISK_SYNC))) ||
+		    (is_dev_alive(dv_rep) && (disks[d*2+1].state & (1<<MD_DISK_SYNC)))) {
+			avail_disks ++;
+			avail[d] = 1;
+		} else
+			rv |= !! c->test;
+	}
+
+	if (c->brief) {
+		mdu_bitmap_file_t bmf;
+		if (inactive && !is_container)
+			printf("INACTIVE-ARRAY %s", dev);
+		else
+			printf("ARRAY %s", dev);
+		if (c->verbose > 0) {
+			if (array.raid_disks)
+				printf(" level=%s num-devices=%d",
+				       str ? str : "-unknown-",
+				       array.raid_disks);
+			else if (is_container)
+				printf(" level=container num-devices=%d",
+				       array.nr_disks);
+			else
+				printf(" num-devices=%d", array.nr_disks);
+		}
+		if (container) {
+			printf(" container=%s", container);
+			printf(" member=%s", member);
+		} else {
+			if (sra && sra->array.major_version < 0)
+				printf(" metadata=%s", sra->text_version);
+			else
+				printf(" metadata=%d.%d", array.major_version,
+				       array.minor_version);
+		}
+
+		/* Only try GET_BITMAP_FILE for 0.90.01 and later */
+		if (ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 && bmf.pathname[0]) {
+			printf(" bitmap=%s", bmf.pathname);
+		}
+	} else {
+		mdu_bitmap_file_t bmf;
+		unsigned long long larray_size;
+		struct mdstat_ent *ms = mdstat_read(0, 0);
+		struct mdstat_ent *e;
+		char *devnm;
+
+		devnm = stat2devnm(&stb);
+		for (e = ms; e; e = e->next)
+			if (strcmp(e->devnm, devnm) == 0)
+				break;
+		if (!get_dev_size(fd, NULL, &larray_size))
+			larray_size = 0;
+
+		printf("%s:\n", dev);
+
+		if (container)
+			printf("         Container : %s, member %s\n",
+			       container, member);
+		else {
+			if (sra && sra->array.major_version < 0)
+				printf("           Version : %s\n",
+				       sra->text_version);
+			else
+				printf("           Version : %d.%d\n",
+				       array.major_version,
+				       array.minor_version);
+		}
+
+		atime = array.ctime;
+		if (atime)
+			printf("     Creation Time : %.24s\n", ctime(&atime));
+		if (is_container)
+			str = "container";
+		if (str)
+			printf("        Raid Level : %s\n", str);
+		if (larray_size)
+			printf("        Array Size : %llu%s\n",
+			       (larray_size >> 10),
+			       human_size(larray_size));
+		if (array.level >= 1) {
+			if (sra)
+				array.major_version = sra->array.major_version;
+			if (array.major_version != 0 &&
+			    (larray_size >= 0xFFFFFFFFULL|| array.size == 0)) {
+				unsigned long long dsize;
+
+				dsize = get_component_size(fd);
+				if (dsize > 0)
+					printf("     Used Dev Size : %llu%s\n",
+					       dsize/2,
+					 human_size((long long)dsize<<9));
+				else
+					printf("     Used Dev Size : unknown\n");
+			} else
+				printf("     Used Dev Size : %lu%s\n",
+				       (unsigned long)array.size,
+				       human_size((unsigned long long)
+						  array.size << 10));
+		}
+		if (array.raid_disks)
+			printf("      Raid Devices : %d\n", array.raid_disks);
+		printf("     Total Devices : %d\n", array.nr_disks);
+		if (!container &&
+		    ((sra == NULL && array.major_version == 0) ||
+		     (sra && sra->array.major_version == 0)))
+			printf("   Preferred Minor : %d\n", array.md_minor);
+		if (sra == NULL || sra->array.major_version >= 0)
+			printf("       Persistence : Superblock is %spersistent\n",
+			       array.not_persistent ? "not " : "");
+		printf("\n");
+		/* Only try GET_BITMAP_FILE for 0.90.01 and later */
+		if (ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 && bmf.pathname[0]) {
+			printf("     Intent Bitmap : %s\n", bmf.pathname);
+			printf("\n");
+		} else if (array.state & (1<<MD_SB_CLUSTERED))
+			printf("     Intent Bitmap : Internal(Clustered)\n\n");
+		else if (array.state & (1<<MD_SB_BITMAP_PRESENT))
+			printf("     Intent Bitmap : Internal\n\n");
+		atime = array.utime;
+		if (atime)
+			printf("       Update Time : %.24s\n", ctime(&atime));
+		if (array.raid_disks) {
+			static char *sync_action[] = {
+				", recovering",  ", resyncing",
+				", reshaping",   ", checking"  };
+			char *st;
+			if (avail_disks == array.raid_disks)
+				st = "";
+			else if (!enough(array.level, array.raid_disks,
+					 array.layout, 1, avail))
+				st = ", FAILED";
+			else
+				st = ", degraded";
+
+			if (array.state & (1 << MD_SB_CLEAN)) {
+				if ((array.level == 0) ||
+				    (array.level == LEVEL_LINEAR))
+					arrayst = map_num(sysfs_array_states,
+							  sra->array_state);
+				else
+					arrayst = "clean";
+			} else {
+				arrayst = "active";
+				if (array.state & (1<<MD_SB_CLUSTERED)) {
+					for (d = 0; d < max_disks * 2; d++) {
+						char *dv;
+						mdu_disk_info_t disk = disks[d];
+
+						/* only check first valid disk in cluster env */
+						if ((disk.state & (MD_DISK_SYNC | MD_DISK_ACTIVE))
+							&& (disk.major | disk.minor)) {
+							dv = map_dev_preferred(disk.major, disk.minor, 0,
+									c->prefer);
+							if (!dv)
+								continue;
+							arrayst = IsBitmapDirty(dv) ? "active" : "clean";
+							break;
+						}
+					}
+				}
+			}
+
+			printf("             State : %s%s%s%s%s%s%s \n",
+			       arrayst, st,
+			       (!e || (e->percent < 0 &&
+				       e->percent != RESYNC_PENDING &&
+				       e->percent != RESYNC_DELAYED &&
+				       e->percent != RESYNC_REMOTE)) ?
+			       "" : sync_action[e->resync],
+			       larray_size ? "": ", Not Started",
+			       (e && e->percent == RESYNC_DELAYED) ?
+			       " (DELAYED)": "",
+			       (e && e->percent == RESYNC_PENDING) ?
+			       " (PENDING)": "",
+			       (e && e->percent == RESYNC_REMOTE) ?
+			       " (REMOTE)": "");
+		} else if (inactive && !is_container) {
+			printf("             State : inactive\n");
+		}
+		if (array.raid_disks)
+			printf("    Active Devices : %d\n", array.active_disks);
+		if (array.working_disks > 0)
+			printf("   Working Devices : %d\n",
+			       array.working_disks);
+		if (array.raid_disks) {
+			printf("    Failed Devices : %d\n", array.failed_disks);
+			if (!external)
+				printf("     Spare Devices : %d\n", array.spare_disks);
+		}
+		printf("\n");
+		if (array.level == 5) {
+			str = map_num(r5layout, array.layout);
+			printf("            Layout : %s\n",
+			       str ? str : "-unknown-");
+		}
+		if (array.level == 0 && array.layout) {
+			str = map_num(r0layout, array.layout);
+			printf("            Layout : %s\n",
+			       str ? str : "-unknown-");
+		}
+		if (array.level == 6) {
+			str = map_num(r6layout, array.layout);
+			printf("            Layout : %s\n",
+			       str ? str : "-unknown-");
+		}
+		if (array.level == 10) {
+			printf("            Layout :");
+			print_r10_layout(array.layout);
+			printf("\n");
+		}
+		switch (array.level) {
+		case 0:
+		case 4:
+		case 5:
+		case 10:
+		case 6:
+			if (array.chunk_size)
+				printf("        Chunk Size : %dK\n\n",
+				       array.chunk_size/1024);
+			break;
+		case -1:
+			printf("          Rounding : %dK\n\n",
+			       array.chunk_size/1024);
+			break;
+		default:
+			break;
+		}
+
+		if (array.raid_disks) {
+			struct mdinfo *mdi;
+
+			mdi = sysfs_read(fd, NULL, GET_CONSISTENCY_POLICY);
+			if (mdi) {
+				char *policy = map_num(consistency_policies,
+						       mdi->consistency_policy);
+				sysfs_free(mdi);
+				if (policy)
+					printf("Consistency Policy : %s\n\n",
+					       policy);
+			}
+		}
+
+		if (e && e->percent >= 0) {
+			static char *sync_action[] = {
+				"Rebuild", "Resync", "Reshape", "Check"};
+			printf("    %7s Status : %d%% complete\n",
+			       sync_action[e->resync], e->percent);
+		}
+
+		if ((st && st->sb) && (info && info->reshape_active)) {
+#if 0
+This is pretty boring
+			printf("     Reshape pos'n : %llu%s\n",
+			       (unsigned long long) info->reshape_progress << 9,
+			       human_size((unsigned long long)
+					  info->reshape_progress << 9));
+#endif
+			if (info->delta_disks != 0)
+				printf("     Delta Devices : %d, (%d->%d)\n",
+				       info->delta_disks,
+				       array.raid_disks - info->delta_disks,
+				       array.raid_disks);
+			if (info->new_level != array.level) {
+				str = map_num(pers, info->new_level);
+				printf("         New Level : %s\n",
+				       str ? str : "-unknown-");
+			}
+			if (info->new_level != array.level ||
+			    info->new_layout != array.layout) {
+				if (info->new_level == 5) {
+					str = map_num(r5layout,
+						      info->new_layout);
+					printf("        New Layout : %s\n",
+					       str ? str : "-unknown-");
+				}
+				if (info->new_level == 6) {
+					str = map_num(r6layout,
+						      info->new_layout);
+					printf("        New Layout : %s\n",
+					       str ? str : "-unknown-");
+				}
+				if (info->new_level == 10) {
+					printf("        New Layout : near=%d, %s=%d\n",
+					       info->new_layout & 255,
+					       (info->new_layout & 0x10000) ?
+					       "offset" : "far",
+					       (info->new_layout >> 8) & 255);
+				}
+			}
+			if (info->new_chunk != array.chunk_size)
+				printf("     New Chunksize : %dK\n",
+				       info->new_chunk/1024);
+			printf("\n");
+		} else if (e && e->percent >= 0)
+			printf("\n");
+		free_mdstat(ms);
+
+		if (st && st->sb)
+			st->ss->detail_super(st, c->homehost, subarray);
+
+		if (array.raid_disks == 0 && sra &&
+		    sra->array.major_version == -1 &&
+		    sra->array.minor_version == -2 &&
+		    sra->text_version[0] != '/') {
+			/* This looks like a container.  Find any active arrays
+			 * That claim to be a member.
+			 */
+			DIR *dir = opendir("/sys/block");
+			struct dirent *de;
+
+			printf("     Member Arrays :");
+
+			while (dir && (de = readdir(dir)) != NULL) {
+				char path[287];
+				char vbuf[1024];
+				int nlen = strlen(sra->sys_name);
+				dev_t devid;
+				if (de->d_name[0] == '.')
+					continue;
+				sprintf(path,
+					"/sys/block/%s/md/metadata_version",
+					de->d_name);
+				if (load_sys(path, vbuf, sizeof(vbuf)) < 0)
+					continue;
+				if (strncmp(vbuf, "external:", 9) ||
+				    !is_subarray(vbuf + 9) ||
+				    strncmp(vbuf + 10, sra->sys_name, nlen) ||
+				    vbuf[10 + nlen] != '/')
+					continue;
+				devid = devnm2devid(de->d_name);
+				printf(" %s",
+				       map_dev_preferred(major(devid),
+							 minor(devid), 1,
+							 c->prefer));
+			}
+			if (dir)
+				closedir(dir);
+			printf("\n\n");
+		}
+
+		if (!c->no_devices) {
+			if (array.raid_disks)
+				printf("    Number   Major   Minor   RaidDevice State\n");
+			else
+				printf("    Number   Major   Minor   RaidDevice\n");
+		}
+	}
+
+	/* if --no_devices specified, not print component devices info */
+	if (c->no_devices)
+		goto skip_devices_state;
+
+	for (d = 0; d < max_disks * 2; d++) {
+		char *dv;
+		mdu_disk_info_t disk = disks[d];
+
+		if (d >= array.raid_disks * 2 &&
+		    disk.major == 0 && disk.minor == 0)
+			continue;
+		if ((d & 1) && disk.major == 0 && disk.minor == 0)
+			continue;
+		if (!c->brief) {
+			if (d == array.raid_disks*2)
+				printf("\n");
+			if (disk.number < 0 && disk.raid_disk < 0)
+				printf("       -   %5d    %5d        -     ",
+				       disk.major, disk.minor);
+			else if (disk.raid_disk < 0 ||
+				 disk.state & (1 << MD_DISK_JOURNAL))
+				printf("   %5d   %5d    %5d        -     ",
+				       disk.number, disk.major, disk.minor);
+			else if (disk.number < 0)
+				printf("       -   %5d    %5d    %5d     ",
+				       disk.major, disk.minor, disk.raid_disk);
+			else
+				printf("   %5d   %5d    %5d    %5d     ",
+				       disk.number, disk.major, disk.minor,
+				       disk.raid_disk);
+		}
+		if (!c->brief && array.raid_disks) {
+			if (disk.state & (1 << MD_DISK_FAULTY)) {
+				printf(" faulty");
+				if (disk.raid_disk < array.raid_disks &&
+				    disk.raid_disk >= 0)
+					failed++;
+			}
+			if (disk.state & (1 << MD_DISK_ACTIVE))
+				printf(" active");
+			if (disk.state & (1 << MD_DISK_SYNC)) {
+				printf(" sync");
+				if (array.level == 10 &&
+				    (array.layout & ~0x1FFFF) == 0) {
+					int nc = array.layout & 0xff;
+					int fc = (array.layout >> 8) & 0xff;
+					int copies = nc*fc;
+					if (fc == 1 &&
+					    array.raid_disks % copies == 0 &&
+					    copies <= 26) {
+						/* We can divide the devices
+						   into 'sets' */
+						int set;
+						set = disk.raid_disk % copies;
+						printf(" set-%c", set + 'A');
+					}
+				}
+			}
+			if (disk.state & (1 << MD_DISK_REMOVED))
+				printf(" removed");
+			if (disk.state & (1 << MD_DISK_WRITEMOSTLY))
+				printf(" writemostly");
+			if (disk.state & (1 << MD_DISK_FAILFAST))
+				printf(" failfast");
+			if (disk.state & (1 << MD_DISK_JOURNAL))
+				printf(" journal");
+			if ((disk.state &
+			     ((1 << MD_DISK_ACTIVE) | (1 << MD_DISK_SYNC) |
+			      (1 << MD_DISK_REMOVED) | (1 << MD_DISK_FAULTY) |
+			      (1 << MD_DISK_JOURNAL))) == 0) {
+				printf(" spare");
+				if (disk.raid_disk < array.raid_disks &&
+				    disk.raid_disk >= 0)
+					printf(" rebuilding");
+			}
+		}
+		if (disk.state == 0)
+			spares++;
+		dv = map_dev_preferred(disk.major, disk.minor, 0, c->prefer);
+		if (dv != NULL) {
+			if (c->brief)
+				n_devices = add_device(dv, &devices,
+						       &max_devices, n_devices);
+			else
+				printf("   %s", dv);
+		} else if (disk.major | disk.minor)
+			printf("   missing");
+		if (!c->brief)
+			printf("\n");
+	}
+
+skip_devices_state:
+	if (spares && c->brief && array.raid_disks)
+		printf(" spares=%d", spares);
+	if (c->brief && st && st->sb)
+		st->ss->brief_detail_super(st, subarray);
+	if (st)
+		st->ss->free_super(st);
+
+	if (c->brief && c->verbose > 0 && devices) {
+		qsort(devices, n_devices, sizeof(*devices), cmpstringp);
+		printf("\n   devices=%s", devices[0]);
+		for (d = 1; d < n_devices; d++)
+			printf(",%s", devices[d]);
+	}
+	if (c->brief)
+		printf("\n");
+	if (c->test &&
+	    !enough(array.level, array.raid_disks, array.layout, 1, avail))
+		rv = 2;
+
+out:
+	free(info);
+	free(disks);
+	close(fd);
+	free(subarray);
+	free(avail);
+	if (devices)
+		for (d = 0; d < n_devices; d++)
+			free(devices[d]);
+	free(devices);
+	sysfs_free(sra);
+	free(st);
+	return rv;
+}
+
+int Detail_Platform(struct superswitch *ss, int scan, int verbose, int export, char *controller_path)
+{
+	/* display platform capabilities for the given metadata format
+	 * 'scan' in this context means iterate over all metadata types
+	 */
+	int i;
+	int err = 1;
+
+	if (ss && export && ss->export_detail_platform)
+		err = ss->export_detail_platform(verbose, controller_path);
+	else if (ss && ss->detail_platform)
+		err = ss->detail_platform(verbose, 0, controller_path);
+	else if (ss) {
+		if (verbose > 0)
+			pr_err("%s metadata is platform independent\n",
+				ss->name ? : "[no name]");
+	} else if (!scan) {
+		if (verbose > 0)
+			pr_err("specify a metadata type or --scan\n");
+	}
+
+	if (!scan)
+		return err;
+
+	err = 0;
+	for (i = 0; superlist[i]; i++) {
+		struct superswitch *meta = superlist[i];
+
+		if (meta == ss)
+			continue;
+		if (verbose > 0)
+			pr_err("checking metadata %s\n",
+				meta->name ? : "[no name]");
+		if (!meta->detail_platform) {
+			if (verbose > 0)
+				pr_err("%s metadata is platform independent\n",
+					meta->name ? : "[no name]");
+		} else if (export && meta->export_detail_platform) {
+			err |= meta->export_detail_platform(verbose, controller_path);
+		} else
+			err |= meta->detail_platform(verbose, 0, controller_path);
+	}
+
+	return err;
+}