[thirdparty/mdadm.git] / Detail.c

/*
 * mdadm - manage Linux "md" devices aka RAID arrays.
 *
 * Copyright (C) 2001-2012 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	<dirent.h>

static int cmpstringp(const void *p1, const void *p2)
{
	return strcmp(* (char * const *) p1, * (char * const *) p2);
}

int Detail(char *dev, struct context *c)
{
	/*
	 * Print out details for an md array by using
	 * GET_ARRAY_INFO and GET_DISK_INFO ioctl calls
	 */

	int fd = open(dev, O_RDONLY);
	int vers;
	mdu_array_info_t array;
	mdu_disk_info_t *disks;
	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 is_26 = get_linux_version() >= 2006000;
	int is_rebuilding = 0;
	int failed = 0;
	struct supertype *st;
	char *subarray = NULL;
	int max_disks = MD_SB_DISKS; /* just a default */
	struct mdinfo *info = NULL;
	struct mdinfo *sra;
	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;

	if (fd < 0) {
		pr_err("cannot open %s: %s\n",
			dev, strerror(errno));
		return rv;
	}
	vers = md_get_version(fd);
	if (vers < 0) {
		pr_err("%s does not appear to be an md device\n",
			dev);
		close(fd);
		return rv;
	}
	if (vers < 9000) {
		pr_err("cannot get detail for md device %s: driver version too old.\n",
			dev);
		close(fd);
		return rv;
	}
	sra = sysfs_read(fd, NULL, GET_VERSION|GET_DEVS);
	external = (sra != NULL && sra->array.major_version == -1
		    && sra->array.minor_version == -2);
	st = super_by_fd(fd, &subarray);
	if (ioctl(fd, GET_ARRAY_INFO, &array) == 0) {
		inactive = 0;
	} else if (errno == ENODEV) {
		array = sra->array;
		inactive = 1;
	} else {
		pr_err("cannot get array detail for %s: %s\n",
		       dev, strerror(errno));
		close(fd);
		return rv;
	}

	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
		 */
		int 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 (ioctl(fd, GET_DISK_INFO, &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... */
	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 (!inactive)
				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);
		} 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');
			}
		}
		if (sra) {
			struct mdinfo *mdi;
			for (mdi  = sra->devs; mdi; mdi = mdi->next) {
				char *path =
					map_dev(mdi->disk.major,
						mdi->disk.minor, 0);

				if (mdi->disk.raid_disk >= 0)
					printf("MD_DEVICE_%s_ROLE=%d\n",
					       mdi->sys_name+4,
					       mdi->disk.raid_disk);
				else
					printf("MD_DEVICE_%s_ROLE=spare\n",
					       mdi->sys_name+4);
				if (path)
					printf("MD_DEVICE_%s_DEV=%s\n",
					       mdi->sys_name+4, path);
			}
		}
		goto out;
	}

	disks = xmalloc(max_disks * sizeof(mdu_disk_info_t));
	for (d = 0; d < max_disks; d++) {
		disks[d].state = (1<<MD_DISK_REMOVED);
		disks[d].major = disks[d].minor = 0;
		disks[d].number = disks[d].raid_disk = d;
	}

	next = array.raid_disks*2;
	if (inactive) {
		struct mdinfo *mdi;
		if (sra != NULL)
			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 (ioctl(fd, GET_DISK_INFO, &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))
			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))
			disks[disk.raid_disk*2+1] = disk;
		else if (next < max_disks)
			disks[next++] = disk;
	}

	avail = xcalloc(array.raid_disks, 1);

	for (d= 0; d < array.raid_disks; d++) {

		if ((disks[d*2].state & (1<<MD_DISK_SYNC)) ||
		    (disks[d*2+1].state & (1<<MD_DISK_SYNC))) {
			avail_disks ++;
			avail[d] = 1;
		}
	}

	if (c->brief) {
		mdu_bitmap_file_t bmf;
		printf("%sARRAY %s", inactive ? "INACTIVE-":"", dev);
		if (c->verbose > 0) {
			if (array.raid_disks)
				printf(" level=%s num-devices=%d",
				       str?str:"-unknown-",
				       array.raid_disks );
			else if (!inactive)
				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 (vers >= 9001 &&
		    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 (array.raid_disks == 0 && external)
			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 = 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 : %d%s\n", array.size,
				       human_size((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 (vers >= 9001 &&
		    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_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";

			printf("          State : %s%s%s%s%s%s \n",
			       (array.state&(1<<MD_SB_CLEAN))?"clean":"active", st,
			       (!e || (e->percent < 0 && e->percent != RESYNC_PENDING &&
			       e->percent != RESYNC_DELAYED)) ? "" : sync_action[e->resync],
			       larray_size ? "": ", Not Started",
			       e->percent == RESYNC_DELAYED ? " (DELAYED)": "",
			       e->percent == RESYNC_PENDING ? " (PENDING)": "");
		} else if (inactive) {
			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);
			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 == 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 (e && e->percent >= 0) {
			static char *sync_action[] = {
				"Rebuild", "Resync",
				"Reshape", "Check"};
			printf(" %7s Status : %d%% complete\n", sync_action[e->resync], e->percent);
			is_rebuilding = 1;
		}
		free_mdstat(ms);

		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");
		if (st && st->sb)
			st->ss->detail_super(st, c->homehost);

		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[200];
				char vbuf[1024];
				int nlen = strlen(sra->sys_name);
				int devid;
				if (de->d_name[0] == '.')
					continue;
				sprintf(path, "/sys/block/%s/md/metadata_version",
					de->d_name);
				if (load_sys(path, vbuf) < 0)
					continue;
				if (strncmp(vbuf, "external:", 9) != 0 ||
				    !is_subarray(vbuf+9) ||
				    strncmp(vbuf+10, sra->sys_name, nlen) != 0 ||
				    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 (array.raid_disks)
			printf("    Number   Major   Minor   RaidDevice State\n");
		else
			printf("    Number   Major   Minor   RaidDevice\n");
	}
	free(info);

	for (d= 0; d < max_disks; 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)
				printf("       -   %5d    %5d        -     ",
				       disk.major, disk.minor);
			else if (disk.raid_disk < 0)
				printf("   %5d   %5d    %5d        -     ",
				       disk.number, disk.major, disk.minor);
			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 = 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_ACTIVE)|(1<<MD_DISK_SYNC)
			      |(1<<MD_DISK_REMOVED)|(1<<MD_DISK_FAULTY)))
			    == 0) {
				printf(" spare");
				if (is_26) {
					if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
						printf(" rebuilding");
				} else if (is_rebuilding && failed) {
					/* Taking a bit of a risk here, we remove the
					 * device from the array, and then put it back.
					 * If this fails, we are rebuilding
					 */
					int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
					if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
					if (err && errno ==  EBUSY)
						printf(" rebuilding");
				}
			}
		}
		if (disk.state == 0) spares++;
		if (c->test && d < array.raid_disks
		    && !(disk.state & (1<<MD_DISK_SYNC)))
			rv |= 1;
		dv=map_dev_preferred(disk.major, disk.minor, 0, c->prefer);
		if (dv != NULL) {
			if (c->brief) {
				if (n_devices + 1 >= max_devices) {
					max_devices += 16;
					devices = xrealloc(devices, max_devices
							   *sizeof(*devices));
					if (!devices)
						goto out;
				};
				devices[n_devices] = xstrdup(dv);
				n_devices++;
			} else
				printf("   %s", dv);
		}
		if (!c->brief) printf("\n");
	}
	if (spares && c->brief && array.raid_disks) printf(" spares=%d", spares);
	if (c->brief && st && st->sb)
		st->ss->brief_detail_super(st);
	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;

	free(disks);
out:
	close(fd);
	free(subarray);
	free(avail);
	for (d = 0; d < n_devices; d++)
		free(devices[d]);
	free(devices);
	sysfs_free(sra);
	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;
}
Commit	Line	Data
	1	/*
	2	* mdadm - manage Linux "md" devices aka RAID arrays.
	3	*
	4	* Copyright (C) 2001-2012 Neil Brown <neilb@suse.de>
	5	*
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*
	21	* Author: Neil Brown
	22	* Email: <neilb@suse.de>
	23	*/
	24
	25	#include "mdadm.h"
	26	#include "md_p.h"
	27	#include "md_u.h"
	28	#include <dirent.h>
	29
	30	static int cmpstringp(const void p1, const void p2)
	31	{
	32	return strcmp(* (char * const ) p1, (char * const *) p2);
	33	}
	34
	35	int Detail(char dev, struct context c)
	36	{
	37	/*
	38	* Print out details for an md array by using
	39	* GET_ARRAY_INFO and GET_DISK_INFO ioctl calls
	40	*/
	41
	42	int fd = open(dev, O_RDONLY);
	43	int vers;
	44	mdu_array_info_t array;
	45	mdu_disk_info_t *disks;
	46	int next;
	47	int d;
	48	time_t atime;
	49	char *str;
	50	char **devices = NULL;
	51	int max_devices = 0, n_devices = 0;
	52	int spares = 0;
	53	struct stat stb;
	54	int is_26 = get_linux_version() >= 2006000;
	55	int is_rebuilding = 0;
	56	int failed = 0;
	57	struct supertype *st;
	58	char *subarray = NULL;
	59	int max_disks = MD_SB_DISKS; /* just a default */
	60	struct mdinfo *info = NULL;
	61	struct mdinfo *sra;
	62	struct mdinfo *subdev;
	63	char *member = NULL;
	64	char *container = NULL;
	65
	66	int rv = c->test ? 4 : 1;
	67	int avail_disks = 0;
	68	char *avail = NULL;
	69	int external;
	70	int inactive;
	71
	72	if (fd < 0) {
	73	pr_err("cannot open %s: %s\n",
	74	dev, strerror(errno));
	75	return rv;
	76	}
	77	vers = md_get_version(fd);
	78	if (vers < 0) {
	79	pr_err("%s does not appear to be an md device\n",
	80	dev);
	81	close(fd);
	82	return rv;
	83	}
	84	if (vers < 9000) {
	85	pr_err("cannot get detail for md device %s: driver version too old.\n",
	86	dev);
	87	close(fd);
	88	return rv;
	89	}
	90	sra = sysfs_read(fd, NULL, GET_VERSION\|GET_DEVS);
	91	external = (sra != NULL && sra->array.major_version == -1
	92	&& sra->array.minor_version == -2);
	93	st = super_by_fd(fd, &subarray);
	94	if (ioctl(fd, GET_ARRAY_INFO, &array) == 0) {
	95	inactive = 0;
	96	} else if (errno == ENODEV) {
	97	array = sra->array;
	98	inactive = 1;
	99	} else {
	100	pr_err("cannot get array detail for %s: %s\n",
	101	dev, strerror(errno));
	102	close(fd);
	103	return rv;
	104	}
	105
	106	if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
	107	stb.st_rdev = 0;
	108	rv = 0;
	109
	110	if (st)
	111	max_disks = st->max_devs;
	112
	113	if (subarray) {
	114	/* This is a subarray of some container.
	115	* We want the name of the container, and the member
	116	*/
	117	int devid = devnm2devid(st->container_devnm);
	118	int cfd, err;
	119
	120	member = subarray;
	121	container = map_dev_preferred(major(devid), minor(devid),
	122	1, c->prefer);
	123	cfd = open_dev(st->container_devnm);
	124	if (cfd >= 0) {
	125	err = st->ss->load_container(st, cfd, NULL);
	126	close(cfd);
	127	if (err == 0)
	128	info = st->ss->container_content(st, subarray);
	129	}
	130	}
	131
	132	/* try to load a superblock. Try sra->devs first, then try ioctl */
	133	if (st && !info) for (d = 0, subdev = sra ? sra->devs : NULL;
	134	d < max_disks \|\| subdev;
	135	subdev ? (void)(subdev = subdev->next) : (void)(d++)){
	136	mdu_disk_info_t disk;
	137	char *dv;
	138	int fd2;
	139	int err;
	140	if (subdev)
	141	disk = subdev->disk;
	142	else {
	143	disk.number = d;
	144	if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
	145	continue;
	146	if (d >= array.raid_disks &&
	147	disk.major == 0 &&
	148	disk.minor == 0)
	149	continue;
	150	}
	151
	152	if (array.raid_disks > 0 &&
	153	(disk.state & (1 << MD_DISK_ACTIVE)) == 0)
	154	continue;
	155
	156	dv = map_dev(disk.major, disk.minor, 1);
	157	if (!dv)
	158	continue;
	159
	160	fd2 = dev_open(dv, O_RDONLY);
	161	if (fd2 < 0)
	162	continue;
	163
	164	if (st->sb)
	165	st->ss->free_super(st);
	166
	167	err = st->ss->load_super(st, fd2, NULL);
	168	close(fd2);
	169	if (err)
	170	continue;
	171	if (info)
	172	free(info);
	173	if (subarray)
	174	info = st->ss->container_content(st, subarray);
	175	else {
	176	info = xmalloc(sizeof(*info));
	177	st->ss->getinfo_super(st, info, NULL);
	178	}
	179	if (!info)
	180	continue;
	181
	182	if (array.raid_disks != 0 && /* container */
	183	(info->array.ctime != array.ctime \|\|
	184	info->array.level != array.level)) {
	185	st->ss->free_super(st);
	186	continue;
	187	}
	188	/* some formats (imsm) have free-floating-spares
	189	* with a uuid of uuid_zero, they don't
	190	* have very good info about the rest of the
	191	* container, so keep searching when
	192	* encountering such a device. Otherwise, stop
	193	* after the first successful call to
	194	* ->load_super.
	195	*/
	196	if (memcmp(uuid_zero,
	197	info->uuid,
	198	sizeof(uuid_zero)) == 0) {
	199	st->ss->free_super(st);
	200	continue;
	201	}
	202	break;
	203	}
	204
	205	/* Ok, we have some info to print... */
	206	str = map_num(pers, array.level);
	207
	208	if (c->export) {
	209	if (array.raid_disks) {
	210	if (str)
	211	printf("MD_LEVEL=%s\n", str);
	212	printf("MD_DEVICES=%d\n", array.raid_disks);
	213	} else {
	214	if (!inactive)
	215	printf("MD_LEVEL=container\n");
	216	printf("MD_DEVICES=%d\n", array.nr_disks);
	217	}
	218	if (container) {
	219	printf("MD_CONTAINER=%s\n", container);
	220	printf("MD_MEMBER=%s\n", member);
	221	} else {
	222	if (sra && sra->array.major_version < 0)
	223	printf("MD_METADATA=%s\n", sra->text_version);
	224	else
	225	printf("MD_METADATA=%d.%d\n",
	226	array.major_version, array.minor_version);
	227	}
	228
	229	if (st && st->sb && info) {
	230	char nbuf[64];
	231	struct map_ent mp, map = NULL;
	232
	233	fname_from_uuid(st, info, nbuf, ':');
	234	printf("MD_UUID=%s\n", nbuf+5);
	235	mp = map_by_uuid(&map, info->uuid);
	236	if (mp && mp->path &&
	237	strncmp(mp->path, "/dev/md/", 8) == 0) {
	238	printf("MD_DEVNAME=");
	239	print_escape(mp->path+8);
	240	putchar('\n');
	241	}
	242
	243	if (st->ss->export_detail_super)
	244	st->ss->export_detail_super(st);
	245	} else {
	246	struct map_ent mp, map = NULL;
	247	char nbuf[64];
	248	mp = map_by_devnm(&map, fd2devnm(fd));
	249	if (mp) {
	250	__fname_from_uuid(mp->uuid, 0, nbuf, ':');
	251	printf("MD_UUID=%s\n", nbuf+5);
	252	}
	253	if (mp && mp->path &&
	254	strncmp(mp->path, "/dev/md/", 8) == 0) {
	255	printf("MD_DEVNAME=");
	256	print_escape(mp->path+8);
	257	putchar('\n');
	258	}
	259	}
	260	if (sra) {
	261	struct mdinfo *mdi;
	262	for (mdi = sra->devs; mdi; mdi = mdi->next) {
	263	char *path =
	264	map_dev(mdi->disk.major,
	265	mdi->disk.minor, 0);
	266
	267	if (mdi->disk.raid_disk >= 0)
	268	printf("MD_DEVICE_%s_ROLE=%d\n",
	269	mdi->sys_name+4,
	270	mdi->disk.raid_disk);
	271	else
	272	printf("MD_DEVICE_%s_ROLE=spare\n",
	273	mdi->sys_name+4);
	274	if (path)
	275	printf("MD_DEVICE_%s_DEV=%s\n",
	276	mdi->sys_name+4, path);
	277	}
	278	}
	279	goto out;
	280	}
	281
	282	disks = xmalloc(max_disks * sizeof(mdu_disk_info_t));
	283	for (d = 0; d < max_disks; d++) {
	284	disks[d].state = (1<<MD_DISK_REMOVED);
	285	disks[d].major = disks[d].minor = 0;
	286	disks[d].number = disks[d].raid_disk = d;
	287	}
	288
	289	next = array.raid_disks*2;
	290	if (inactive) {
	291	struct mdinfo *mdi;
	292	if (sra != NULL)
	293	for (mdi = sra->devs; mdi; mdi = mdi->next) {
	294	disks[next++] = mdi->disk;
	295	disks[next-1].number = -1;
	296	}
	297	} else for (d = 0; d < max_disks; d++) {
	298	mdu_disk_info_t disk;
	299	disk.number = d;
	300	if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
	301	if (d < array.raid_disks)
	302	pr_err("cannot get device detail for device %d: %s\n",
	303	d, strerror(errno));
	304	continue;
	305	}
	306	if (disk.major == 0 && disk.minor == 0)
	307	continue;
	308	if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks
	309	&& disks[disk.raid_disk*2].state == (1<<MD_DISK_REMOVED))
	310	disks[disk.raid_disk*2] = disk;
	311	else if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks
	312	&& disks[disk.raid_disk*2+1].state == (1<<MD_DISK_REMOVED))
	313	disks[disk.raid_disk*2+1] = disk;
	314	else if (next < max_disks)
	315	disks[next++] = disk;
	316	}
	317
	318	avail = xcalloc(array.raid_disks, 1);
	319
	320	for (d= 0; d < array.raid_disks; d++) {
	321
	322	if ((disks[d*2].state & (1<<MD_DISK_SYNC)) \|\|
	323	(disks[d*2+1].state & (1<<MD_DISK_SYNC))) {
	324	avail_disks ++;
	325	avail[d] = 1;
	326	}
	327	}
	328
	329	if (c->brief) {
	330	mdu_bitmap_file_t bmf;
	331	printf("%sARRAY %s", inactive ? "INACTIVE-":"", dev);
	332	if (c->verbose > 0) {
	333	if (array.raid_disks)
	334	printf(" level=%s num-devices=%d",
	335	str?str:"-unknown-",
	336	array.raid_disks );
	337	else if (!inactive)
	338	printf(" level=container num-devices=%d",
	339	array.nr_disks);
	340	else
	341	printf(" num-devices=%d", array.nr_disks);
	342	}
	343	if (container) {
	344	printf(" container=%s", container);
	345	printf(" member=%s", member);
	346	} else {
	347	if (sra && sra->array.major_version < 0)
	348	printf(" metadata=%s", sra->text_version);
	349	else
	350	printf(" metadata=%d.%d",
	351	array.major_version, array.minor_version);
	352	}
	353
	354	/* Only try GET_BITMAP_FILE for 0.90.01 and later */
	355	if (vers >= 9001 &&
	356	ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
	357	bmf.pathname[0]) {
	358	printf(" bitmap=%s", bmf.pathname);
	359	}
	360	} else {
	361	mdu_bitmap_file_t bmf;
	362	unsigned long long larray_size;
	363	struct mdstat_ent *ms = mdstat_read(0, 0);
	364	struct mdstat_ent *e;
	365	char *devnm;
	366
	367	devnm = stat2devnm(&stb);
	368	for (e=ms; e; e=e->next)
	369	if (strcmp(e->devnm, devnm) == 0)
	370	break;
	371	if (!get_dev_size(fd, NULL, &larray_size))
	372	larray_size = 0;
	373
	374	printf("%s:\n", dev);
	375
	376	if (container)
	377	printf(" Container : %s, member %s\n", container, member);
	378	else {
	379	if (sra && sra->array.major_version < 0)
	380	printf(" Version : %s\n", sra->text_version);
	381	else
	382	printf(" Version : %d.%d\n",
	383	array.major_version, array.minor_version);
	384	}
	385
	386	atime = array.ctime;
	387	if (atime)
	388	printf(" Creation Time : %.24s\n", ctime(&atime));
	389	if (array.raid_disks == 0 && external)
	390	str = "container";
	391	if (str)
	392	printf(" Raid Level : %s\n", str);
	393	if (larray_size)
	394	printf(" Array Size : %llu%s\n", (larray_size>>10),
	395	human_size(larray_size));
	396	if (array.level >= 1) {
	397	if (sra)
	398	array.major_version = sra->array.major_version;
	399	if (array.major_version != 0 &&
	400	(larray_size >= 0xFFFFFFFFULL\|\| array.size == 0)) {
	401	unsigned long long dsize = get_component_size(fd);
	402	if (dsize > 0)
	403	printf(" Used Dev Size : %llu%s\n",
	404	dsize/2,
	405	human_size((long long)dsize<<9));
	406	else
	407	printf(" Used Dev Size : unknown\n");
	408	} else
	409	printf(" Used Dev Size : %d%s\n", array.size,
	410	human_size((long long)array.size<<10));
	411	}
	412	if (array.raid_disks)
	413	printf(" Raid Devices : %d\n", array.raid_disks);
	414	printf(" Total Devices : %d\n", array.nr_disks);
	415	if (!container &&
	416	((sra == NULL && array.major_version == 0) \|\|
	417	(sra && sra->array.major_version == 0)))
	418	printf("Preferred Minor : %d\n", array.md_minor);
	419	if (sra == NULL \|\| sra->array.major_version >= 0)
	420	printf(" Persistence : Superblock is %spersistent\n",
	421	array.not_persistent?"not ":"");
	422	printf("\n");
	423	/* Only try GET_BITMAP_FILE for 0.90.01 and later */
	424	if (vers >= 9001 &&
	425	ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
	426	bmf.pathname[0]) {
	427	printf(" Intent Bitmap : %s\n", bmf.pathname);
	428	printf("\n");
	429	} else if (array.state & (1<<MD_SB_BITMAP_PRESENT))
	430	printf(" Intent Bitmap : Internal\n\n");
	431	atime = array.utime;
	432	if (atime)
	433	printf(" Update Time : %.24s\n", ctime(&atime));
	434	if (array.raid_disks) {
	435	static char *sync_action[] = {
	436	", recovering", ", resyncing",
	437	", reshaping", ", checking" };
	438	char *st;
	439	if (avail_disks == array.raid_disks)
	440	st = "";
	441	else if (!enough(array.level, array.raid_disks,
	442	array.layout, 1, avail))
	443	st = ", FAILED";
	444	else
	445	st = ", degraded";
	446
	447	printf(" State : %s%s%s%s%s%s \n",
	448	(array.state&(1<<MD_SB_CLEAN))?"clean":"active", st,
	449	(!e \|\| (e->percent < 0 && e->percent != RESYNC_PENDING &&
	450	e->percent != RESYNC_DELAYED)) ? "" : sync_action[e->resync],
	451	larray_size ? "": ", Not Started",
	452	e->percent == RESYNC_DELAYED ? " (DELAYED)": "",
	453	e->percent == RESYNC_PENDING ? " (PENDING)": "");
	454	} else if (inactive) {
	455	printf(" State : inactive\n");
	456	}
	457	if (array.raid_disks)
	458	printf(" Active Devices : %d\n", array.active_disks);
	459	if (array.working_disks > 0)
	460	printf("Working Devices : %d\n", array.working_disks);
	461	if (array.raid_disks) {
	462	printf(" Failed Devices : %d\n", array.failed_disks);
	463	printf(" Spare Devices : %d\n", array.spare_disks);
	464	}
	465	printf("\n");
	466	if (array.level == 5) {
	467	str = map_num(r5layout, array.layout);
	468	printf(" Layout : %s\n", str?str:"-unknown-");
	469	}
	470	if (array.level == 6) {
	471	str = map_num(r6layout, array.layout);
	472	printf(" Layout : %s\n", str?str:"-unknown-");
	473	}
	474	if (array.level == 10) {
	475	printf(" Layout :");
	476	print_r10_layout(array.layout);
	477	printf("\n");
	478	}
	479	switch (array.level) {
	480	case 0:
	481	case 4:
	482	case 5:
	483	case 10:
	484	case 6:
	485	if (array.chunk_size)
	486	printf(" Chunk Size : %dK\n\n",
	487	array.chunk_size/1024);
	488	break;
	489	case -1:
	490	printf(" Rounding : %dK\n\n", array.chunk_size/1024);
	491	break;
	492	default: break;
	493	}
	494
	495	if (e && e->percent >= 0) {
	496	static char *sync_action[] = {
	497	"Rebuild", "Resync",
	498	"Reshape", "Check"};
	499	printf(" %7s Status : %d%% complete\n", sync_action[e->resync], e->percent);
	500	is_rebuilding = 1;
	501	}
	502	free_mdstat(ms);
	503
	504	if ((st && st->sb) && (info && info->reshape_active)) {
	505	#if 0
	506	This is pretty boring
	507	printf(" Reshape pos'n : %llu%s\n", (unsigned long long) info->reshape_progress<<9,
	508	human_size((unsigned long long)info->reshape_progress<<9));
	509	#endif
	510	if (info->delta_disks != 0)
	511	printf(" Delta Devices : %d, (%d->%d)\n",
	512	info->delta_disks,
	513	array.raid_disks - info->delta_disks,
	514	array.raid_disks);
	515	if (info->new_level != array.level) {
	516	str = map_num(pers, info->new_level);
	517	printf(" New Level : %s\n", str?str:"-unknown-");
	518	}
	519	if (info->new_level != array.level \|\|
	520	info->new_layout != array.layout) {
	521	if (info->new_level == 5) {
	522	str = map_num(r5layout, info->new_layout);
	523	printf(" New Layout : %s\n",
	524	str?str:"-unknown-");
	525	}
	526	if (info->new_level == 6) {
	527	str = map_num(r6layout, info->new_layout);
	528	printf(" New Layout : %s\n",
	529	str?str:"-unknown-");
	530	}
	531	if (info->new_level == 10) {
	532	printf(" New Layout : near=%d, %s=%d\n",
	533	info->new_layout&255,
	534	(info->new_layout&0x10000)?"offset":"far",
	535	(info->new_layout>>8)&255);
	536	}
	537	}
	538	if (info->new_chunk != array.chunk_size)
	539	printf(" New Chunksize : %dK\n", info->new_chunk/1024);
	540	printf("\n");
	541	} else if (e && e->percent >= 0)
	542	printf("\n");
	543	if (st && st->sb)
	544	st->ss->detail_super(st, c->homehost);
	545
	546	if (array.raid_disks == 0 && sra && sra->array.major_version == -1
	547	&& sra->array.minor_version == -2 && sra->text_version[0] != '/') {
	548	/* This looks like a container. Find any active arrays
	549	* That claim to be a member.
	550	*/
	551	DIR *dir = opendir("/sys/block");
	552	struct dirent *de;
	553
	554	printf(" Member Arrays :");
	555
	556	while (dir && (de = readdir(dir)) != NULL) {
	557	char path[200];
	558	char vbuf[1024];
	559	int nlen = strlen(sra->sys_name);
	560	int devid;
	561	if (de->d_name[0] == '.')
	562	continue;
	563	sprintf(path, "/sys/block/%s/md/metadata_version",
	564	de->d_name);
	565	if (load_sys(path, vbuf) < 0)
	566	continue;
	567	if (strncmp(vbuf, "external:", 9) != 0 \|\|
	568	!is_subarray(vbuf+9) \|\|
	569	strncmp(vbuf+10, sra->sys_name, nlen) != 0 \|\|
	570	vbuf[10+nlen] != '/')
	571	continue;
	572	devid = devnm2devid(de->d_name);
	573	printf(" %s", map_dev_preferred(
	574	major(devid),
	575	minor(devid), 1, c->prefer));
	576	}
	577	if (dir)
	578	closedir(dir);
	579	printf("\n\n");
	580	}
	581
	582	if (array.raid_disks)
	583	printf(" Number Major Minor RaidDevice State\n");
	584	else
	585	printf(" Number Major Minor RaidDevice\n");
	586	}
	587	free(info);
	588
	589	for (d= 0; d < max_disks; d++) {
	590	char *dv;
	591	mdu_disk_info_t disk = disks[d];
	592
	593	if (d >= array.raid_disks*2 &&
	594	disk.major == 0 &&
	595	disk.minor == 0)
	596	continue;
	597	if ((d & 1) &&
	598	disk.major == 0 &&
	599	disk.minor == 0)
	600	continue;
	601	if (!c->brief) {
	602	if (d == array.raid_disks*2) printf("\n");
	603	if (disk.number < 0)
	604	printf(" - %5d %5d - ",
	605	disk.major, disk.minor);
	606	else if (disk.raid_disk < 0)
	607	printf(" %5d %5d %5d - ",
	608	disk.number, disk.major, disk.minor);
	609	else
	610	printf(" %5d %5d %5d %5d ",
	611	disk.number, disk.major, disk.minor, disk.raid_disk);
	612	}
	613	if (!c->brief && array.raid_disks) {
	614
	615	if (disk.state & (1<<MD_DISK_FAULTY)) {
	616	printf(" faulty");
	617	if (disk.raid_disk < array.raid_disks &&
	618	disk.raid_disk >= 0)
	619	failed++;
	620	}
	621	if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
	622	if (disk.state & (1<<MD_DISK_SYNC)) {
	623	printf(" sync");
	624	if (array.level == 10 && (array.layout & ~0x1FFFF) == 0) {
	625	int nc = array.layout & 0xff;
	626	int fc = (array.layout >> 8) & 0xff;
	627	int copies = nc*fc;
	628	if (fc == 1 && array.raid_disks % copies == 0 && copies <= 26) {
	629	/* We can divide the devices into 'sets' */
	630	int set = disk.raid_disk % copies;
	631	printf(" set-%c", set + 'A');
	632	}
	633	}
	634	}
	635	if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
	636	if (disk.state & (1<<MD_DISK_WRITEMOSTLY)) printf(" writemostly");
	637	if ((disk.state &
	638	((1<<MD_DISK_ACTIVE)\|(1<<MD_DISK_SYNC)
	639	\|(1<<MD_DISK_REMOVED)\|(1<<MD_DISK_FAULTY)))
	640	== 0) {
	641	printf(" spare");
	642	if (is_26) {
	643	if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
	644	printf(" rebuilding");
	645	} else if (is_rebuilding && failed) {
	646	/* Taking a bit of a risk here, we remove the
	647	* device from the array, and then put it back.
	648	* If this fails, we are rebuilding
	649	*/
	650	int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
	651	if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
	652	if (err && errno == EBUSY)
	653	printf(" rebuilding");
	654	}
	655	}
	656	}
	657	if (disk.state == 0) spares++;
	658	if (c->test && d < array.raid_disks
	659	&& !(disk.state & (1<<MD_DISK_SYNC)))
	660	rv \|= 1;
	661	dv=map_dev_preferred(disk.major, disk.minor, 0, c->prefer);
	662	if (dv != NULL) {
	663	if (c->brief) {
	664	if (n_devices + 1 >= max_devices) {
	665	max_devices += 16;
	666	devices = xrealloc(devices, max_devices
	667	sizeof(devices));
	668	if (!devices)
	669	goto out;
	670	};
	671	devices[n_devices] = xstrdup(dv);
	672	n_devices++;
	673	} else
	674	printf(" %s", dv);
	675	}
	676	if (!c->brief) printf("\n");
	677	}
	678	if (spares && c->brief && array.raid_disks) printf(" spares=%d", spares);
	679	if (c->brief && st && st->sb)
	680	st->ss->brief_detail_super(st);
	681	if (st)
	682	st->ss->free_super(st);
	683
	684	if (c->brief && c->verbose > 0 && devices) {
	685	qsort(devices, n_devices, sizeof(*devices), cmpstringp);
	686	printf("\n devices=%s", devices[0]);
	687	for (d = 1; d < n_devices; d++)
	688	printf(",%s", devices[d]);
	689	}
	690	if (c->brief)
	691	printf("\n");
	692	if (c->test &&
	693	!enough(array.level, array.raid_disks, array.layout,
	694	1, avail))
	695	rv = 2;
	696
	697	free(disks);
	698	out:
	699	close(fd);
	700	free(subarray);
	701	free(avail);
	702	for (d = 0; d < n_devices; d++)
	703	free(devices[d]);
	704	free(devices);
	705	sysfs_free(sra);
	706	return rv;
	707	}
	708
	709	int Detail_Platform(struct superswitch ss, int scan, int verbose, int export, char controller_path)
	710	{
	711	/* display platform capabilities for the given metadata format
	712	* 'scan' in this context means iterate over all metadata types
	713	*/
	714	int i;
	715	int err = 1;
	716
	717	if (ss && export && ss->export_detail_platform)
	718	err = ss->export_detail_platform(verbose, controller_path);
	719	else if (ss && ss->detail_platform)
	720	err = ss->detail_platform(verbose, 0, controller_path);
	721	else if (ss) {
	722	if (verbose > 0)
	723	pr_err("%s metadata is platform independent\n",
	724	ss->name ? : "[no name]");
	725	} else if (!scan) {
	726	if (verbose > 0)
	727	pr_err("specify a metadata type or --scan\n");
	728	}
	729
	730	if (!scan)
	731	return err;
	732
	733	err = 0;
	734	for (i = 0; superlist[i]; i++) {
	735	struct superswitch *meta = superlist[i];
	736
	737	if (meta == ss)
	738	continue;
	739	if (verbose > 0)
	740	pr_err("checking metadata %s\n",
	741	meta->name ? : "[no name]");
	742	if (!meta->detail_platform) {
	743	if (verbose > 0)
	744	pr_err("%s metadata is platform independent\n",
	745	meta->name ? : "[no name]");
	746	} else if (export && meta->export_detail_platform) {
	747	err \|= meta->export_detail_platform(verbose, controller_path);
	748	} else
	749	err \|= meta->detail_platform(verbose, 0, controller_path);
	750	}
	751
	752	return err;
	753	}