[thirdparty/mdadm.git] / Manage.c

/*
 * mdadm - manage Linux "md" devices aka RAID arrays.
 *
 * Copyright (C) 2001-2006 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@cse.unsw.edu.au>
 *    Paper: Neil Brown
 *           School of Computer Science and Engineering
 *           The University of New South Wales
 *           Sydney, 2052
 *           Australia
 */

#include "mdadm.h"
#include "md_u.h"
#include "md_p.h"

#define REGISTER_DEV 		_IO (MD_MAJOR, 1)
#define START_MD     		_IO (MD_MAJOR, 2)
#define STOP_MD      		_IO (MD_MAJOR, 3)

int Manage_ro(char *devname, int fd, int readonly)
{
	/* switch to readonly or rw
	 *
	 * requires >= 0.90.0
	 * first check that array is runing
	 * use RESTART_ARRAY_RW or STOP_ARRAY_RO
	 *
	 */
	mdu_array_info_t array;

	if (md_get_version(fd) < 9000) {
		fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
		return 1;
	}
	if (ioctl(fd, GET_ARRAY_INFO, &array)) {
		fprintf(stderr, Name ": %s does not appear to be active.\n",
			devname);
		return 1;
	}

	if (readonly>0) {
		if (ioctl(fd, STOP_ARRAY_RO, NULL)) {
			fprintf(stderr, Name ": failed to set readonly for %s: %s\n",
				devname, strerror(errno));
			return 1;
		}
	} else if (readonly < 0) {
		if (ioctl(fd, RESTART_ARRAY_RW, NULL)) {
			fprintf(stderr, Name ": failed to set writable for %s: %s\n",
				devname, strerror(errno));
			return 1;
		}
	}
	return 0;
}

#ifndef MDASSEMBLE

int Manage_runstop(char *devname, int fd, int runstop, int quiet)
{
	/* Run or stop the array. array must already be configured
	 * required >= 0.90.0
	 */
	mdu_param_t param; /* unused */

	if (runstop == -1 && md_get_version(fd) < 9000) {
		if (ioctl(fd, STOP_MD, 0)) {
			if (!quiet) fprintf(stderr, Name ": stopping device %s failed: %s\n",
					    devname, strerror(errno));
			return 1;
		}
	}

	if (md_get_version(fd) < 9000) {
		fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
		return 1;
	}
	/*
	if (ioctl(fd, GET_ARRAY_INFO, &array)) {
		fprintf(stderr, Name ": %s does not appear to be active.\n",
			devname);
		return 1;
	}
	*/
	if (runstop>0) {
		if (ioctl(fd, RUN_ARRAY, &param)) {
			fprintf(stderr, Name ": failed to run array %s: %s\n",
				devname, strerror(errno));
			return 1;
		}
		if (quiet <= 0)
			fprintf(stderr, Name ": started %s\n", devname);
	} else if (runstop < 0){
		struct map_ent *map = NULL;
		struct stat stb;
		if (ioctl(fd, STOP_ARRAY, NULL)) {
			if (quiet==0) {
				fprintf(stderr, Name ": fail to stop array %s: %s\n",
					devname, strerror(errno));
				if (errno == EBUSY)
					fprintf(stderr, "Perhaps a running "
						"process, mounted filesystem "
						"or active volume group?\n");
			}
			return 1;
		}
		if (quiet <= 0)
			fprintf(stderr, Name ": stopped %s\n", devname);
		if (fstat(fd, &stb) == 0) {
			int devnum;
			if (major(stb.st_rdev) == MD_MAJOR)
				devnum = minor(stb.st_rdev);
			else
				devnum = -1-(minor(stb.st_rdev)>>6);
			map_delete(&map, devnum);
			map_write(map);
			map_free(map);
		}
	}
	return 0;
}

int Manage_resize(char *devname, int fd, long long size, int raid_disks)
{
	mdu_array_info_t info;
	if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
		fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
			devname, strerror(errno));
		return 1;
	}
	if (size >= 0)
		info.size = size;
	if (raid_disks > 0)
		info.raid_disks = raid_disks;
	if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
		fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n",
			devname, strerror(errno));
		return 1;
	}
	return 0;
}

int Manage_reconfig(char *devname, int fd, int layout)
{
	mdu_array_info_t info;
	if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
		fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
			devname, strerror(errno));
		return 1;
	}
	info.layout = layout;
	printf("layout set to %d\n", info.layout);
	if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
		fprintf(stderr, Name ": Cannot set layout for %s: %s\n",
			devname, strerror(errno));
		return 1;
	}
	return 0;
}

int Manage_subdevs(char *devname, int fd,
		   mddev_dev_t devlist, int verbose)
{
	/* do something to each dev.
	 * devmode can be
	 *  'a' - add the device
	 *	   try HOT_ADD_DISK
	 *         If that fails EINVAL, try ADD_NEW_DISK
	 *  'r' - remove the device HOT_REMOVE_DISK
	 *        device can be 'faulty' or 'detached' in which case all
	 *	  matching devices are removed.
	 *  'f' - set the device faulty SET_DISK_FAULTY
	 *        device can be 'detached' in which case any device that
	 *	  is inaccessible will be marked faulty.
	 */
	mdu_array_info_t array;
	mdu_disk_info_t disc;
	unsigned long long array_size;
	mddev_dev_t dv, next = NULL;
	struct stat stb;
	int j, jnext = 0;
	int tfd;
	struct supertype *st, *tst;
	int duuid[4];
	int ouuid[4];

	if (ioctl(fd, GET_ARRAY_INFO, &array)) {
		fprintf(stderr, Name ": cannot get array info for %s\n",
			devname);
		return 1;
	}

	/* array.size is only 32 bit and may be truncated.
	 * So read from sysfs if possible, and record number of sectors
	 */

	array_size = get_component_size(fd);
	if (array_size <= 0)
		array_size = array.size * 2;

	tst = super_by_fd(fd);
	if (!tst) {
		fprintf(stderr, Name ": unsupport array - version %d.%d\n",
			array.major_version, array.minor_version);
		return 1;
	}

	for (dv = devlist, j=0 ; dv; dv = next, j = jnext) {
		unsigned long long ldsize;
		char dvname[20];
		char *dnprintable = dv->devname;

		next = dv->next;
		jnext = 0;

		if (strcmp(dv->devname, "failed")==0 ||
		    strcmp(dv->devname, "faulty")==0) {
			if (dv->disposition != 'r') {
				fprintf(stderr, Name ": %s only meaningful "
					"with -r, not -%c\n",
					dv->devname, dv->disposition);
				return 1;
			}
			for (; j < array.raid_disks + array.nr_disks ; j++) {
				disc.number = j;
				if (ioctl(fd, GET_DISK_INFO, &disc))
					continue;
				if (disc.major == 0 && disc.minor == 0)
					continue;
				if ((disc.state & 1) == 0) /* faulty */
					continue;
				stb.st_rdev = makedev(disc.major, disc.minor);
				next = dv;
				jnext = j+1;
				sprintf(dvname,"%d:%d", disc.major, disc.minor);
				dnprintable = dvname;
				break;
			}
			if (jnext == 0)
				continue;
		} else if (strcmp(dv->devname, "detached") == 0) {
			if (dv->disposition != 'r' && dv->disposition != 'f') {
				fprintf(stderr, Name ": %s only meaningful "
					"with -r of -f, not -%c\n",
					dv->devname, dv->disposition);
				return 1;
			}
			for (; j < array.raid_disks + array.nr_disks; j++) {
				int sfd;
				disc.number = j;
				if (ioctl(fd, GET_DISK_INFO, &disc))
					continue;
				if (disc.major == 0 && disc.minor == 0)
					continue;
				sprintf(dvname,"%d:%d", disc.major, disc.minor);
				sfd = dev_open(dvname, O_RDONLY);
				if (sfd >= 0) {
					close(sfd);
					continue;
				}
				if (dv->disposition == 'f' &&
				    (disc.state & 1) == 1) /* already faulty */
					continue;
				if (errno != ENXIO)
					continue;
				stb.st_rdev = makedev(disc.major, disc.minor);
				next = dv;
				jnext = j+1;
				dnprintable = dvname;
				break;
			}
			if (jnext == 0)
				continue;
		} else {
			j = 0;

			tfd = dev_open(dv->devname, O_RDONLY);
			if (tfd < 0 || fstat(tfd, &stb) != 0) {
				fprintf(stderr, Name ": cannot find %s: %s\n",
					dv->devname, strerror(errno));
				if (tfd >= 0)
					close(tfd);
				return 1;
			}
			close(tfd);
			if ((stb.st_mode & S_IFMT) != S_IFBLK) {
				fprintf(stderr, Name ": %s is not a "
					"block device.\n",
					dv->devname);
				return 1;
			}
		}
		switch(dv->disposition){
		default:
			fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
				dv->devname, dv->disposition);
			return 1;
		case 'a':
			/* add the device */

			/* Make sure it isn't in use (in 2.6 or later) */
			tfd = dev_open(dv->devname, O_RDONLY|O_EXCL);
			if (tfd < 0) {
				fprintf(stderr, Name ": Cannot open %s: %s\n",
					dv->devname, strerror(errno));
				return 1;
			}
			remove_partitions(tfd);

			st = dup_super(tst);

			if (array.not_persistent==0)
				st->ss->load_super(st, tfd, NULL);

			if (!get_dev_size(tfd, dv->devname, &ldsize)) {
				close(tfd);
				return 1;
			}
			close(tfd);

			if (array.major_version == 0 &&
			    md_get_version(fd)%100 < 2) {
				if (ioctl(fd, HOT_ADD_DISK,
					  (unsigned long)stb.st_rdev)==0) {
					if (verbose >= 0)
						fprintf(stderr, Name ": hot added %s\n",
							dv->devname);
					continue;
				}

				fprintf(stderr, Name ": hot add failed for %s: %s\n",
					dv->devname, strerror(errno));
				return 1;
			}

			if (array.not_persistent == 0) {

				/* need to find a sample superblock to copy, and
				 * a spare slot to use
				 */
				for (j = 0; j < tst->max_devs; j++) {
					char *dev;
					int dfd;
					disc.number = j;
					if (ioctl(fd, GET_DISK_INFO, &disc))
						continue;
					if (disc.major==0 && disc.minor==0)
						continue;
					if ((disc.state & 4)==0) continue; /* sync */
					/* Looks like a good device to try */
					dev = map_dev(disc.major, disc.minor, 1);
					if (!dev) continue;
					dfd = dev_open(dev, O_RDONLY);
					if (dfd < 0) continue;
					if (tst->ss->load_super(tst, dfd,
								NULL)) {
						close(dfd);
						continue;
					}
					close(dfd);
					break;
				}
				if (!tst->sb) {
					fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n");
					return 1;
				}

				/* Make sure device is large enough */
				if (tst->ss->avail_size(tst, ldsize/512, 0) <
				    array_size) {
					fprintf(stderr, Name ": %s not large enough to join array\n",
						dv->devname);
					return 1;
				}

				/* Possibly this device was recently part of the array
				 * and was temporarily removed, and is now being re-added.
				 * If so, we can simply re-add it.
				 */
				tst->ss->uuid_from_super(tst, duuid);

				/* re-add doesn't work for version-1 superblocks
				 * before 2.6.18 :-(
				 */
				if (array.major_version == 1 &&
				    get_linux_version() <= 2006018)
					;
				else if (st->sb) {
					st->ss->uuid_from_super(st, ouuid);
					if (memcmp(duuid, ouuid, sizeof(ouuid))==0) {
						/* looks close enough for now.  Kernel
						 * will worry about whether a bitmap
						 * based reconstruction is possible.
						 */
						struct mdinfo mdi;
						st->ss->getinfo_super(st, &mdi);
						disc.major = major(stb.st_rdev);
						disc.minor = minor(stb.st_rdev);
						disc.number = mdi.disk.number;
						disc.raid_disk = mdi.disk.raid_disk;
						disc.state = mdi.disk.state;
						if (dv->writemostly == 1)
							disc.state |= 1 << MD_DISK_WRITEMOSTLY;
						if (dv->writemostly == 2)
							disc.state &= ~(1 << MD_DISK_WRITEMOSTLY);
						if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
							if (verbose >= 0)
								fprintf(stderr, Name ": re-added %s\n", dv->devname);
							continue;
						}
						if (errno == ENOMEM || errno == EROFS) {
							fprintf(stderr, Name ": add new device failed for %s: %s\n",
								dv->devname, strerror(errno));
							return 1;
						}
						/* fall back on normal-add */
					}
				}
			} else {
				/* non-persistent. Must ensure that new drive
				 * is at least array.size big.
				 */
				if (ldsize/512 < array_size) {
					fprintf(stderr, Name ": %s not large enough to join array\n",
						dv->devname);
					return 1;
				}
			}
			/* in 2.6.17 and earlier, version-1 superblocks won't
			 * use the number we write, but will choose a free number.
			 * we must choose the same free number, which requires
			 * starting at 'raid_disks' and counting up
			 */
			for (j = array.raid_disks; j< tst->max_devs; j++) {
				disc.number = j;
				if (ioctl(fd, GET_DISK_INFO, &disc))
					break;
				if (disc.major==0 && disc.minor==0)
					break;
				if (disc.state & 8) /* removed */
					break;
			}
			disc.major = major(stb.st_rdev);
			disc.minor = minor(stb.st_rdev);
			disc.number =j;
			disc.state = 0;
			if (array.not_persistent==0) {
				if (dv->writemostly == 1)
					disc.state |= 1 << MD_DISK_WRITEMOSTLY;
				tst->ss->add_to_super(tst, &disc);
				if (tst->ss->write_init_super(tst, &disc,
							      dv->devname))
					return 1;
			} else if (dv->re_add) {
				/*  this had better be raid1.
				 * As we are "--re-add"ing we must find a spare slot
				 * to fill.
				 */
				char *used = malloc(array.raid_disks);
				memset(used, 0, array.raid_disks);
				for (j=0; j< tst->max_devs; j++) {
					mdu_disk_info_t disc2;
					disc2.number = j;
					if (ioctl(fd, GET_DISK_INFO, &disc2))
						continue;
					if (disc2.major==0 && disc2.minor==0)
						continue;
					if (disc2.state & 8) /* removed */
						continue;
					if (disc2.raid_disk < 0)
						continue;
					if (disc2.raid_disk > array.raid_disks)
						continue;
					used[disc2.raid_disk] = 1;
				}
				for (j=0 ; j<array.raid_disks; j++)
					if (!used[j]) {
						disc.raid_disk = j;
						disc.state |= (1<<MD_DISK_SYNC);
						break;
					}
			}
			if (dv->writemostly == 1)
				disc.state |= (1 << MD_DISK_WRITEMOSTLY);
			if (ioctl(fd,ADD_NEW_DISK, &disc)) {
				fprintf(stderr, Name ": add new device failed for %s as %d: %s\n",
					dv->devname, j, strerror(errno));
				return 1;
			}
			if (verbose >= 0)
				fprintf(stderr, Name ": added %s\n", dv->devname);
			break;

		case 'r':
			/* hot remove */
			/* FIXME check that it is a current member */
			if (ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev)) {
				fprintf(stderr, Name ": hot remove failed "
					"for %s: %s\n",	dnprintable,
					strerror(errno));
				return 1;
			}
			if (verbose >= 0)
				fprintf(stderr, Name ": hot removed %s\n",
					dnprintable);
			break;

		case 'f': /* set faulty */
			/* FIXME check current member */
			if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) {
				fprintf(stderr, Name ": set device faulty failed for %s:  %s\n",
					dnprintable, strerror(errno));
				return 1;
			}
			if (verbose >= 0)
				fprintf(stderr, Name ": set %s faulty in %s\n",
					dnprintable, devname);
			break;
		}
	}
	return 0;

}

int autodetect(void)
{
	/* Open any md device, and issue the RAID_AUTORUN ioctl */
	int rv = 1;
	int fd = dev_open("9:0", O_RDONLY);
	if (fd >= 0) {
		if (ioctl(fd, RAID_AUTORUN, 0) == 0)
			rv = 0;
		close(fd);
	}
	return rv;
}
#endif
Commit	Line	Data
64c4757e	1	/*
9a9dab36	2	* mdadm - manage Linux "md" devices aka RAID arrays.
64c4757e	3	*
4f589ad0	4	* Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
64c4757e NB	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@cse.unsw.edu.au>
	23	* Paper: Neil Brown
	24	* School of Computer Science and Engineering
	25	* The University of New South Wales
	26	* Sydney, 2052
	27	* Australia
	28	*/
	29
9a9dab36	30	#include "mdadm.h"
682c7051 NB	31	#include "md_u.h"
682c7051 NB	32	#include "md_p.h"
64c4757e	33
82b27616 NB	34	#define REGISTER_DEV _IO (MD_MAJOR, 1)
	35	#define START_MD _IO (MD_MAJOR, 2)
	36	#define STOP_MD _IO (MD_MAJOR, 3)
	37
64c4757e NB	38	int Manage_ro(char *devname, int fd, int readonly)
64c4757e NB	39	{
682c7051 NB	40	/* switch to readonly or rw
	41	*
	42	* requires >= 0.90.0
	43	* first check that array is runing
	44	* use RESTART_ARRAY_RW or STOP_ARRAY_RO
	45	*
	46	*/
	47	mdu_array_info_t array;
aba69144	48
682c7051 NB	49	if (md_get_version(fd) < 9000) {
	50	fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
	51	return 1;
	52	}
	53	if (ioctl(fd, GET_ARRAY_INFO, &array)) {
	54	fprintf(stderr, Name ": %s does not appear to be active.\n",
	55	devname);
	56	return 1;
	57	}
aba69144	58
682c7051 NB	59	if (readonly>0) {
	60	if (ioctl(fd, STOP_ARRAY_RO, NULL)) {
	61	fprintf(stderr, Name ": failed to set readonly for %s: %s\n",
	62	devname, strerror(errno));
	63	return 1;
	64	}
	65	} else if (readonly < 0) {
	66	if (ioctl(fd, RESTART_ARRAY_RW, NULL)) {
82b27616	67	fprintf(stderr, Name ": failed to set writable for %s: %s\n",
682c7051 NB	68	devname, strerror(errno));
	69	return 1;
	70	}
	71	}
aba69144	72	return 0;
64c4757e NB	73	}
64c4757e NB	74
435d4ebb LB	75	#ifndef MDASSEMBLE
435d4ebb LB	76
91f068bf	77	int Manage_runstop(char *devname, int fd, int runstop, int quiet)
64c4757e	78	{
682c7051 NB	79	/* Run or stop the array. array must already be configured
	80	* required >= 0.90.0
	81	*/
682c7051	82	mdu_param_t param; /* unused */
82b27616 NB	83
	84	if (runstop == -1 && md_get_version(fd) < 9000) {
	85	if (ioctl(fd, STOP_MD, 0)) {
91f068bf NB	86	if (!quiet) fprintf(stderr, Name ": stopping device %s failed: %s\n",
91f068bf NB	87	devname, strerror(errno));
82b27616 NB	88	return 1;
	89	}
	90	}
aba69144	91
682c7051 NB	92	if (md_get_version(fd) < 9000) {
	93	fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
	94	return 1;
	95	}
82b27616	96	/*
682c7051 NB	97	if (ioctl(fd, GET_ARRAY_INFO, &array)) {
	98	fprintf(stderr, Name ": %s does not appear to be active.\n",
	99	devname);
	100	return 1;
	101	}
82b27616	102	*/
682c7051 NB	103	if (runstop>0) {
	104	if (ioctl(fd, RUN_ARRAY, &param)) {
	105	fprintf(stderr, Name ": failed to run array %s: %s\n",
	106	devname, strerror(errno));
	107	return 1;
	108	}
8382f19b NB	109	if (quiet <= 0)
8382f19b NB	110	fprintf(stderr, Name ": started %s\n", devname);
682c7051	111	} else if (runstop < 0){
8382f19b NB	112	struct map_ent *map = NULL;
8382f19b NB	113	struct stat stb;
682c7051	114	if (ioctl(fd, STOP_ARRAY, NULL)) {
d927f3c4	115	if (quiet==0) {
91f068bf NB	116	fprintf(stderr, Name ": fail to stop array %s: %s\n",
91f068bf NB	117	devname, strerror(errno));
d927f3c4 NB	118	if (errno == EBUSY)
	119	fprintf(stderr, "Perhaps a running "
	120	"process, mounted filesystem "
	121	"or active volume group?\n");
	122	}
682c7051 NB	123	return 1;
682c7051 NB	124	}
ab56093f NB	125	if (quiet <= 0)
ab56093f NB	126	fprintf(stderr, Name ": stopped %s\n", devname);
8382f19b NB	127	if (fstat(fd, &stb) == 0) {
	128	int devnum;
	129	if (major(stb.st_rdev) == MD_MAJOR)
	130	devnum = minor(stb.st_rdev);
	131	else
	132	devnum = -1-(minor(stb.st_rdev)>>6);
	133	map_delete(&map, devnum);
	134	map_write(map);
	135	map_free(map);
	136	}
682c7051 NB	137	}
682c7051 NB	138	return 0;
64c4757e NB	139	}
64c4757e NB	140
dd0781e5 NB	141	int Manage_resize(char *devname, int fd, long long size, int raid_disks)
	142	{
	143	mdu_array_info_t info;
	144	if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
	145	fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
	146	devname, strerror(errno));
	147	return 1;
	148	}
	149	if (size >= 0)
	150	info.size = size;
	151	if (raid_disks > 0)
	152	info.raid_disks = raid_disks;
	153	if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
	154	fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n",
	155	devname, strerror(errno));
	156	return 1;
	157	}
	158	return 0;
	159	}
	160
b5e64645 NB	161	int Manage_reconfig(char *devname, int fd, int layout)
	162	{
	163	mdu_array_info_t info;
	164	if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
	165	fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
	166	devname, strerror(errno));
	167	return 1;
	168	}
	169	info.layout = layout;
	170	printf("layout set to %d\n", info.layout);
	171	if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
	172	fprintf(stderr, Name ": Cannot set layout for %s: %s\n",
	173	devname, strerror(errno));
	174	return 1;
	175	}
	176	return 0;
	177	}
dd0781e5	178
64c4757e	179	int Manage_subdevs(char *devname, int fd,
dab6685f	180	mddev_dev_t devlist, int verbose)
cd29a5c8	181	{
682c7051 NB	182	/* do something to each dev.
	183	* devmode can be
	184	* 'a' - add the device
	185	* try HOT_ADD_DISK
	186	* If that fails EINVAL, try ADD_NEW_DISK
	187	* 'r' - remove the device HOT_REMOVE_DISK
b80da661 NB	188	* device can be 'faulty' or 'detached' in which case all
b80da661 NB	189	* matching devices are removed.
682c7051	190	* 'f' - set the device faulty SET_DISK_FAULTY
b80da661 NB	191	* device can be 'detached' in which case any device that
b80da661 NB	192	* is inaccessible will be marked faulty.
682c7051 NB	193	*/
	194	mdu_array_info_t array;
	195	mdu_disk_info_t disc;
7a3be72f	196	unsigned long long array_size;
b80da661	197	mddev_dev_t dv, next = NULL;
682c7051	198	struct stat stb;
b80da661	199	int j, jnext = 0;
0fbf459d	200	int tfd;
3da92f27	201	struct supertype st, tst;
fe80f49b NB	202	int duuid[4];
fe80f49b NB	203	int ouuid[4];
682c7051 NB	204
	205	if (ioctl(fd, GET_ARRAY_INFO, &array)) {
	206	fprintf(stderr, Name ": cannot get array info for %s\n",
	207	devname);
	208	return 1;
	209	}
3da92f27	210
7a3be72f NB	211	/* array.size is only 32 bit and may be truncated.
	212	* So read from sysfs if possible, and record number of sectors
	213	*/
	214
	215	array_size = get_component_size(fd);
	216	if (array_size <= 0)
	217	array_size = array.size * 2;
	218
1686dc25	219	tst = super_by_fd(fd);
3da92f27 NB	220	if (!tst) {
	221	fprintf(stderr, Name ": unsupport array - version %d.%d\n",
	222	array.major_version, array.minor_version);
	223	return 1;
	224	}
	225
b80da661	226	for (dv = devlist, j=0 ; dv; dv = next, j = jnext) {
4a39c6f2	227	unsigned long long ldsize;
b80da661 NB	228	char dvname[20];
b80da661 NB	229	char *dnprintable = dv->devname;
4a39c6f2	230
b80da661 NB	231	next = dv->next;
	232	jnext = 0;
	233
	234	if (strcmp(dv->devname, "failed")==0 \|\|
	235	strcmp(dv->devname, "faulty")==0) {
	236	if (dv->disposition != 'r') {
	237	fprintf(stderr, Name ": %s only meaningful "
	238	"with -r, not -%c\n",
	239	dv->devname, dv->disposition);
	240	return 1;
	241	}
	242	for (; j < array.raid_disks + array.nr_disks ; j++) {
	243	disc.number = j;
	244	if (ioctl(fd, GET_DISK_INFO, &disc))
	245	continue;
	246	if (disc.major == 0 && disc.minor == 0)
	247	continue;
	248	if ((disc.state & 1) == 0) /* faulty */
	249	continue;
	250	stb.st_rdev = makedev(disc.major, disc.minor);
	251	next = dv;
	252	jnext = j+1;
	253	sprintf(dvname,"%d:%d", disc.major, disc.minor);
	254	dnprintable = dvname;
	255	break;
	256	}
	257	if (jnext == 0)
	258	continue;
	259	} else if (strcmp(dv->devname, "detached") == 0) {
	260	if (dv->disposition != 'r' && dv->disposition != 'f') {
	261	fprintf(stderr, Name ": %s only meaningful "
	262	"with -r of -f, not -%c\n",
	263	dv->devname, dv->disposition);
	264	return 1;
	265	}
	266	for (; j < array.raid_disks + array.nr_disks; j++) {
	267	int sfd;
	268	disc.number = j;
	269	if (ioctl(fd, GET_DISK_INFO, &disc))
	270	continue;
	271	if (disc.major == 0 && disc.minor == 0)
	272	continue;
	273	sprintf(dvname,"%d:%d", disc.major, disc.minor);
	274	sfd = dev_open(dvname, O_RDONLY);
	275	if (sfd >= 0) {
	276	close(sfd);
	277	continue;
	278	}
	279	if (dv->disposition == 'f' &&
	280	(disc.state & 1) == 1) /* already faulty */
	281	continue;
	282	if (errno != ENXIO)
	283	continue;
	284	stb.st_rdev = makedev(disc.major, disc.minor);
	285	next = dv;
	286	jnext = j+1;
	287	dnprintable = dvname;
	288	break;
	289	}
	290	if (jnext == 0)
	291	continue;
	292	} else {
	293	j = 0;
	294
c7b47447 N	295	tfd = dev_open(dv->devname, O_RDONLY);
c7b47447 N	296	if (tfd < 0 \|\| fstat(tfd, &stb) != 0) {
b80da661 NB	297	fprintf(stderr, Name ": cannot find %s: %s\n",
b80da661 NB	298	dv->devname, strerror(errno));
c7b47447 N	299	if (tfd >= 0)
c7b47447 N	300	close(tfd);
b80da661 NB	301	return 1;
b80da661 NB	302	}
c7b47447	303	close(tfd);
b80da661 NB	304	if ((stb.st_mode & S_IFMT) != S_IFBLK) {
	305	fprintf(stderr, Name ": %s is not a "
	306	"block device.\n",
	307	dv->devname);
	308	return 1;
	309	}
682c7051	310	}
cd29a5c8	311	switch(dv->disposition){
682c7051	312	default:
c913b90e NB	313	fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
c913b90e NB	314	dv->devname, dv->disposition);
682c7051 NB	315	return 1;
682c7051 NB	316	case 'a':
4a39c6f2	317	/* add the device */
fe80f49b	318
f277ce36	319	/* Make sure it isn't in use (in 2.6 or later) */
c7b47447	320	tfd = dev_open(dv->devname, O_RDONLY\|O_EXCL);
0fbf459d	321	if (tfd < 0) {
d7eaf49f NB	322	fprintf(stderr, Name ": Cannot open %s: %s\n",
	323	dv->devname, strerror(errno));
	324	return 1;
	325	}
25037aa8	326	remove_partitions(tfd);
3da92f27	327
1686dc25	328	st = dup_super(tst);
3da92f27	329
fe80f49b	330	if (array.not_persistent==0)
3da92f27 NB	331	st->ss->load_super(st, tfd, NULL);
3da92f27 NB	332
beae1dfe	333	if (!get_dev_size(tfd, dv->devname, &ldsize)) {
4a39c6f2 NB	334	close(tfd);
4a39c6f2 NB	335	return 1;
4a39c6f2	336	}
0fbf459d	337	close(tfd);
fe80f49b	338
60d9a174 NB	339	if (array.major_version == 0 &&
60d9a174 NB	340	md_get_version(fd)%100 < 2) {
892debc8 NB	341	if (ioctl(fd, HOT_ADD_DISK,
892debc8 NB	342	(unsigned long)stb.st_rdev)==0) {
dab6685f NB	343	if (verbose >= 0)
	344	fprintf(stderr, Name ": hot added %s\n",
	345	dv->devname);
892debc8 NB	346	continue;
	347	}
	348
cd29a5c8	349	fprintf(stderr, Name ": hot add failed for %s: %s\n",
892debc8	350	dv->devname, strerror(errno));
cd29a5c8 NB	351	return 1;
cd29a5c8 NB	352	}
892debc8	353
fe80f49b NB	354	if (array.not_persistent == 0) {
	355
	356	/* need to find a sample superblock to copy, and
aba69144	357	* a spare slot to use
fe80f49b	358	*/
3da92f27	359	for (j = 0; j < tst->max_devs; j++) {
fe80f49b NB	360	char *dev;
	361	int dfd;
	362	disc.number = j;
	363	if (ioctl(fd, GET_DISK_INFO, &disc))
	364	continue;
	365	if (disc.major==0 && disc.minor==0)
	366	continue;
	367	if ((disc.state & 4)==0) continue; /* sync */
	368	/* Looks like a good device to try */
16c6fa80	369	dev = map_dev(disc.major, disc.minor, 1);
fe80f49b	370	if (!dev) continue;
16c6fa80	371	dfd = dev_open(dev, O_RDONLY);
fe80f49b	372	if (dfd < 0) continue;
3da92f27 NB	373	if (tst->ss->load_super(tst, dfd,
3da92f27 NB	374	NULL)) {
fe80f49b NB	375	close(dfd);
	376	continue;
	377	}
892debc8	378	close(dfd);
fe80f49b NB	379	break;
fe80f49b NB	380	}
3da92f27	381	if (!tst->sb) {
fe80f49b NB	382	fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n");
	383	return 1;
	384	}
2a528478 N	385
2a528478 N	386	/* Make sure device is large enough */
c8b4de0c	387	if (tst->ss->avail_size(tst, ldsize/512, 0) <
2a528478 N	388	array_size) {
	389	fprintf(stderr, Name ": %s not large enough to join array\n",
	390	dv->devname);
	391	return 1;
	392	}
	393
fe80f49b NB	394	/* Possibly this device was recently part of the array
	395	* and was temporarily removed, and is now being re-added.
	396	* If so, we can simply re-add it.
	397	*/
3da92f27	398	tst->ss->uuid_from_super(tst, duuid);
7eae7080 NB	399
	400	/* re-add doesn't work for version-1 superblocks
	401	* before 2.6.18 :-(
	402	*/
	403	if (array.major_version == 1 &&
	404	get_linux_version() <= 2006018)
	405	;
3da92f27 NB	406	else if (st->sb) {
3da92f27 NB	407	st->ss->uuid_from_super(st, ouuid);
fe80f49b	408	if (memcmp(duuid, ouuid, sizeof(ouuid))==0) {
4d20d744 NB	409	/* looks close enough for now. Kernel
	410	* will worry about whether a bitmap
	411	* based reconstruction is possible.
fe80f49b NB	412	*/
fe80f49b NB	413	struct mdinfo mdi;
3da92f27	414	st->ss->getinfo_super(st, &mdi);
fe80f49b NB	415	disc.major = major(stb.st_rdev);
	416	disc.minor = minor(stb.st_rdev);
	417	disc.number = mdi.disk.number;
	418	disc.raid_disk = mdi.disk.raid_disk;
	419	disc.state = mdi.disk.state;
b3d31955	420	if (dv->writemostly == 1)
4d20d744	421	disc.state \|= 1 << MD_DISK_WRITEMOSTLY;
b3d31955 N	422	if (dv->writemostly == 2)
b3d31955 N	423	disc.state &= ~(1 << MD_DISK_WRITEMOSTLY);
fe80f49b NB	424	if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
	425	if (verbose >= 0)
	426	fprintf(stderr, Name ": re-added %s\n", dv->devname);
308e1801	427	continue;
fe80f49b	428	}
c9f39c1b N	429	if (errno == ENOMEM \|\| errno == EROFS) {
	430	fprintf(stderr, Name ": add new device failed for %s: %s\n",
	431	dv->devname, strerror(errno));
	432	return 1;
	433	}
fe80f49b NB	434	/* fall back on normal-add */
fe80f49b NB	435	}
892debc8	436	}
4a39c6f2 NB	437	} else {
	438	/* non-persistent. Must ensure that new drive
	439	* is at least array.size big.
	440	*/
7a3be72f	441	if (ldsize/512 < array_size) {
4a39c6f2 NB	442	fprintf(stderr, Name ": %s not large enough to join array\n",
	443	dv->devname);
	444	return 1;
	445	}
892debc8	446	}
7eae7080 NB	447	/* in 2.6.17 and earlier, version-1 superblocks won't
	448	* use the number we write, but will choose a free number.
	449	* we must choose the same free number, which requires
	450	* starting at 'raid_disks' and counting up
	451	*/
3da92f27	452	for (j = array.raid_disks; j< tst->max_devs; j++) {
aa88f531	453	disc.number = j;
682c7051 NB	454	if (ioctl(fd, GET_DISK_INFO, &disc))
	455	break;
	456	if (disc.major==0 && disc.minor==0)
	457	break;
	458	if (disc.state & 8) /* removed */
	459	break;
	460	}
0df46c2a NB	461	disc.major = major(stb.st_rdev);
0df46c2a NB	462	disc.minor = minor(stb.st_rdev);
892debc8 NB	463	disc.number =j;
892debc8 NB	464	disc.state = 0;
fe80f49b	465	if (array.not_persistent==0) {
b3d31955	466	if (dv->writemostly == 1)
fe80f49b	467	disc.state \|= 1 << MD_DISK_WRITEMOSTLY;
3da92f27 NB	468	tst->ss->add_to_super(tst, &disc);
	469	if (tst->ss->write_init_super(tst, &disc,
	470	dv->devname))
fe80f49b NB	471	return 1;
	472	} else if (dv->re_add) {
	473	/* this had better be raid1.
	474	* As we are "--re-add"ing we must find a spare slot
	475	* to fill.
	476	*/
	477	char *used = malloc(array.raid_disks);
	478	memset(used, 0, array.raid_disks);
3da92f27	479	for (j=0; j< tst->max_devs; j++) {
fe80f49b NB	480	mdu_disk_info_t disc2;
	481	disc2.number = j;
	482	if (ioctl(fd, GET_DISK_INFO, &disc2))
	483	continue;
	484	if (disc2.major==0 && disc2.minor==0)
	485	continue;
	486	if (disc2.state & 8) /* removed */
	487	continue;
	488	if (disc2.raid_disk < 0)
	489	continue;
	490	if (disc2.raid_disk > array.raid_disks)
	491	continue;
	492	used[disc2.raid_disk] = 1;
	493	}
	494	for (j=0 ; j<array.raid_disks; j++)
	495	if (!used[j]) {
	496	disc.raid_disk = j;
	497	disc.state \|= (1<<MD_DISK_SYNC);
	498	break;
	499	}
	500	}
b3d31955	501	if (dv->writemostly == 1)
d8def61c	502	disc.state \|= (1 << MD_DISK_WRITEMOSTLY);
682c7051	503	if (ioctl(fd,ADD_NEW_DISK, &disc)) {
f277ce36 NB	504	fprintf(stderr, Name ": add new device failed for %s as %d: %s\n",
f277ce36 NB	505	dv->devname, j, strerror(errno));
682c7051 NB	506	return 1;
682c7051 NB	507	}
dab6685f NB	508	if (verbose >= 0)
dab6685f NB	509	fprintf(stderr, Name ": added %s\n", dv->devname);
682c7051 NB	510	break;
	511
	512	case 'r':
	513	/* hot remove */
82b27616	514	/* FIXME check that it is a current member */
cd29a5c8	515	if (ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev)) {
b80da661 NB	516	fprintf(stderr, Name ": hot remove failed "
	517	"for %s: %s\n", dnprintable,
	518	strerror(errno));
682c7051 NB	519	return 1;
682c7051 NB	520	}
dab6685f	521	if (verbose >= 0)
b80da661 NB	522	fprintf(stderr, Name ": hot removed %s\n",
b80da661 NB	523	dnprintable);
682c7051 NB	524	break;
	525
	526	case 'f': /* set faulty */
	527	/* FIXME check current member */
cd29a5c8	528	if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) {
b83d95f3	529	fprintf(stderr, Name ": set device faulty failed for %s: %s\n",
b80da661	530	dnprintable, strerror(errno));
682c7051 NB	531	return 1;
682c7051 NB	532	}
dab6685f NB	533	if (verbose >= 0)
dab6685f NB	534	fprintf(stderr, Name ": set %s faulty in %s\n",
b80da661	535	dnprintable, devname);
682c7051 NB	536	break;
	537	}
	538	}
	539	return 0;
aba69144	540
64c4757e	541	}
1f48664b NB	542
	543	int autodetect(void)
	544	{
	545	/* Open any md device, and issue the RAID_AUTORUN ioctl */
	546	int rv = 1;
	547	int fd = dev_open("9:0", O_RDONLY);
	548	if (fd >= 0) {
	549	if (ioctl(fd, RAID_AUTORUN, 0) == 0)
	550	rv = 0;
	551	close(fd);
	552	}
	553	return rv;
	554	}
435d4ebb	555	#endif