[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));
			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;

			if (stat(dv->devname, &stb)) {
				fprintf(stderr, Name ": cannot find %s: %s\n",
					dv->devname, strerror(errno));
				return 1;
			}
			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 = 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) {

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

				/* 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;
				}
				/* 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)
							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;
						}
						/* 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) {
				int dfd;
				if (dv->writemostly)
					disc.state |= 1 << MD_DISK_WRITEMOSTLY;
				dfd = open(dv->devname, O_RDWR | O_EXCL);
				tst->ss->add_to_super(tst, &disc, dfd,
						      dv->devname);
				/* write_init_super will close 'dfd' */
				if (tst->ss->write_init_super(tst))
					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)
				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)) {
ab56093f	115	if (quiet==0)
91f068bf NB	116	fprintf(stderr, Name ": fail to stop array %s: %s\n",
91f068bf NB	117	devname, strerror(errno));
682c7051 NB	118	return 1;
682c7051 NB	119	}
ab56093f NB	120	if (quiet <= 0)
ab56093f NB	121	fprintf(stderr, Name ": stopped %s\n", devname);
8382f19b NB	122	if (fstat(fd, &stb) == 0) {
	123	int devnum;
	124	if (major(stb.st_rdev) == MD_MAJOR)
	125	devnum = minor(stb.st_rdev);
	126	else
	127	devnum = -1-(minor(stb.st_rdev)>>6);
	128	map_delete(&map, devnum);
	129	map_write(map);
	130	map_free(map);
	131	}
682c7051 NB	132	}
682c7051 NB	133	return 0;
64c4757e NB	134	}
64c4757e NB	135
dd0781e5 NB	136	int Manage_resize(char *devname, int fd, long long size, int raid_disks)
	137	{
	138	mdu_array_info_t info;
	139	if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
	140	fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
	141	devname, strerror(errno));
	142	return 1;
	143	}
	144	if (size >= 0)
	145	info.size = size;
	146	if (raid_disks > 0)
	147	info.raid_disks = raid_disks;
	148	if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
	149	fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n",
	150	devname, strerror(errno));
	151	return 1;
	152	}
	153	return 0;
	154	}
	155
b5e64645 NB	156	int Manage_reconfig(char *devname, int fd, int layout)
	157	{
	158	mdu_array_info_t info;
	159	if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
	160	fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
	161	devname, strerror(errno));
	162	return 1;
	163	}
	164	info.layout = layout;
	165	printf("layout set to %d\n", info.layout);
	166	if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
	167	fprintf(stderr, Name ": Cannot set layout for %s: %s\n",
	168	devname, strerror(errno));
	169	return 1;
	170	}
	171	return 0;
	172	}
dd0781e5	173
64c4757e	174	int Manage_subdevs(char *devname, int fd,
dab6685f	175	mddev_dev_t devlist, int verbose)
cd29a5c8	176	{
682c7051 NB	177	/* do something to each dev.
	178	* devmode can be
	179	* 'a' - add the device
	180	* try HOT_ADD_DISK
	181	* If that fails EINVAL, try ADD_NEW_DISK
	182	* 'r' - remove the device HOT_REMOVE_DISK
b80da661 NB	183	* device can be 'faulty' or 'detached' in which case all
b80da661 NB	184	* matching devices are removed.
682c7051	185	* 'f' - set the device faulty SET_DISK_FAULTY
b80da661 NB	186	* device can be 'detached' in which case any device that
b80da661 NB	187	* is inaccessible will be marked faulty.
682c7051 NB	188	*/
	189	mdu_array_info_t array;
	190	mdu_disk_info_t disc;
7a3be72f	191	unsigned long long array_size;
b80da661	192	mddev_dev_t dv, next = NULL;
682c7051	193	struct stat stb;
b80da661	194	int j, jnext = 0;
0fbf459d	195	int tfd;
3da92f27	196	struct supertype st, tst;
fe80f49b NB	197	int duuid[4];
fe80f49b NB	198	int ouuid[4];
682c7051 NB	199
	200	if (ioctl(fd, GET_ARRAY_INFO, &array)) {
	201	fprintf(stderr, Name ": cannot get array info for %s\n",
	202	devname);
	203	return 1;
	204	}
3da92f27	205
7a3be72f NB	206	/* array.size is only 32 bit and may be truncated.
	207	* So read from sysfs if possible, and record number of sectors
	208	*/
	209
	210	array_size = get_component_size(fd);
	211	if (array_size <= 0)
	212	array_size = array.size * 2;
	213
1686dc25	214	tst = super_by_fd(fd);
3da92f27 NB	215	if (!tst) {
	216	fprintf(stderr, Name ": unsupport array - version %d.%d\n",
	217	array.major_version, array.minor_version);
	218	return 1;
	219	}
	220
b80da661	221	for (dv = devlist, j=0 ; dv; dv = next, j = jnext) {
4a39c6f2	222	unsigned long long ldsize;
b80da661 NB	223	char dvname[20];
b80da661 NB	224	char *dnprintable = dv->devname;
4a39c6f2	225
b80da661 NB	226	next = dv->next;
	227	jnext = 0;
	228
	229	if (strcmp(dv->devname, "failed")==0 \|\|
	230	strcmp(dv->devname, "faulty")==0) {
	231	if (dv->disposition != 'r') {
	232	fprintf(stderr, Name ": %s only meaningful "
	233	"with -r, not -%c\n",
	234	dv->devname, dv->disposition);
	235	return 1;
	236	}
	237	for (; j < array.raid_disks + array.nr_disks ; j++) {
	238	disc.number = j;
	239	if (ioctl(fd, GET_DISK_INFO, &disc))
	240	continue;
	241	if (disc.major == 0 && disc.minor == 0)
	242	continue;
	243	if ((disc.state & 1) == 0) /* faulty */
	244	continue;
	245	stb.st_rdev = makedev(disc.major, disc.minor);
	246	next = dv;
	247	jnext = j+1;
	248	sprintf(dvname,"%d:%d", disc.major, disc.minor);
	249	dnprintable = dvname;
	250	break;
	251	}
	252	if (jnext == 0)
	253	continue;
	254	} else if (strcmp(dv->devname, "detached") == 0) {
	255	if (dv->disposition != 'r' && dv->disposition != 'f') {
	256	fprintf(stderr, Name ": %s only meaningful "
	257	"with -r of -f, not -%c\n",
	258	dv->devname, dv->disposition);
	259	return 1;
	260	}
	261	for (; j < array.raid_disks + array.nr_disks; j++) {
	262	int sfd;
	263	disc.number = j;
	264	if (ioctl(fd, GET_DISK_INFO, &disc))
	265	continue;
	266	if (disc.major == 0 && disc.minor == 0)
	267	continue;
	268	sprintf(dvname,"%d:%d", disc.major, disc.minor);
	269	sfd = dev_open(dvname, O_RDONLY);
	270	if (sfd >= 0) {
	271	close(sfd);
	272	continue;
	273	}
	274	if (dv->disposition == 'f' &&
	275	(disc.state & 1) == 1) /* already faulty */
	276	continue;
	277	if (errno != ENXIO)
	278	continue;
	279	stb.st_rdev = makedev(disc.major, disc.minor);
	280	next = dv;
	281	jnext = j+1;
	282	dnprintable = dvname;
	283	break;
	284	}
	285	if (jnext == 0)
	286	continue;
	287	} else {
	288	j = 0;
	289
290	if (stat(dv->devname, &stb)) {
291	fprintf(stderr, Name ": cannot find %s: %s\n",
292	dv->devname, strerror(errno));
293	return 1;
294	}
295	if ((stb.st_mode & S_IFMT) != S_IFBLK) {
296	fprintf(stderr, Name ": %s is not a "
297	"block device.\n",
298	dv->devname);
299	return 1;
300	}
682c7051	301	}
cd29a5c8	302	switch(dv->disposition){
682c7051	303	default:
c913b90e NB	304	fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
c913b90e NB	305	dv->devname, dv->disposition);
682c7051 NB	306	return 1;
682c7051 NB	307	case 'a':
4a39c6f2	308	/* add the device */
fe80f49b	309
f277ce36	310	/* Make sure it isn't in use (in 2.6 or later) */
0fbf459d NB	311	tfd = open(dv->devname, O_RDONLY\|O_EXCL);
0fbf459d NB	312	if (tfd < 0) {
d7eaf49f NB	313	fprintf(stderr, Name ": Cannot open %s: %s\n",
	314	dv->devname, strerror(errno));
	315	return 1;
	316	}
25037aa8	317	remove_partitions(tfd);
3da92f27	318
1686dc25	319	st = dup_super(tst);
3da92f27	320
fe80f49b	321	if (array.not_persistent==0)
3da92f27 NB	322	st->ss->load_super(st, tfd, NULL);
3da92f27 NB	323
beae1dfe	324	if (!get_dev_size(tfd, dv->devname, &ldsize)) {
4a39c6f2 NB	325	close(tfd);
4a39c6f2 NB	326	return 1;
4a39c6f2	327	}
0fbf459d	328	close(tfd);
fe80f49b	329
60d9a174 NB	330	if (array.major_version == 0 &&
60d9a174 NB	331	md_get_version(fd)%100 < 2) {
892debc8 NB	332	if (ioctl(fd, HOT_ADD_DISK,
892debc8 NB	333	(unsigned long)stb.st_rdev)==0) {
dab6685f NB	334	if (verbose >= 0)
	335	fprintf(stderr, Name ": hot added %s\n",
	336	dv->devname);
892debc8 NB	337	continue;
	338	}
	339
cd29a5c8	340	fprintf(stderr, Name ": hot add failed for %s: %s\n",
892debc8	341	dv->devname, strerror(errno));
cd29a5c8 NB	342	return 1;
cd29a5c8 NB	343	}
892debc8	344
fe80f49b NB	345	if (array.not_persistent == 0) {
fe80f49b NB	346
4a39c6f2	347	/* Make sure device is large enough */
3da92f27	348	if (tst->ss->avail_size(tst, ldsize/512) <
7a3be72f	349	array_size) {
4a39c6f2 NB	350	fprintf(stderr, Name ": %s not large enough to join array\n",
	351	dv->devname);
	352	return 1;
	353	}
	354
fe80f49b	355	/* need to find a sample superblock to copy, and
aba69144	356	* a spare slot to use
fe80f49b	357	*/
3da92f27	358	for (j = 0; j < tst->max_devs; j++) {
fe80f49b NB	359	char *dev;
	360	int dfd;
	361	disc.number = j;
	362	if (ioctl(fd, GET_DISK_INFO, &disc))
	363	continue;
	364	if (disc.major==0 && disc.minor==0)
	365	continue;
	366	if ((disc.state & 4)==0) continue; /* sync */
	367	/* Looks like a good device to try */
16c6fa80	368	dev = map_dev(disc.major, disc.minor, 1);
fe80f49b	369	if (!dev) continue;
16c6fa80	370	dfd = dev_open(dev, O_RDONLY);
fe80f49b	371	if (dfd < 0) continue;
3da92f27 NB	372	if (tst->ss->load_super(tst, dfd,
3da92f27 NB	373	NULL)) {
fe80f49b NB	374	close(dfd);
	375	continue;
	376	}
892debc8	377	close(dfd);
fe80f49b NB	378	break;
fe80f49b NB	379	}
3da92f27	380	if (!tst->sb) {
fe80f49b NB	381	fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n");
	382	return 1;
	383	}
	384	/* Possibly this device was recently part of the array
	385	* and was temporarily removed, and is now being re-added.
	386	* If so, we can simply re-add it.
	387	*/
3da92f27	388	tst->ss->uuid_from_super(tst, duuid);
7eae7080 NB	389
	390	/* re-add doesn't work for version-1 superblocks
	391	* before 2.6.18 :-(
	392	*/
	393	if (array.major_version == 1 &&
	394	get_linux_version() <= 2006018)
	395	;
3da92f27 NB	396	else if (st->sb) {
3da92f27 NB	397	st->ss->uuid_from_super(st, ouuid);
fe80f49b	398	if (memcmp(duuid, ouuid, sizeof(ouuid))==0) {
4d20d744 NB	399	/* looks close enough for now. Kernel
	400	* will worry about whether a bitmap
	401	* based reconstruction is possible.
fe80f49b NB	402	*/
fe80f49b NB	403	struct mdinfo mdi;
3da92f27	404	st->ss->getinfo_super(st, &mdi);
fe80f49b NB	405	disc.major = major(stb.st_rdev);
	406	disc.minor = minor(stb.st_rdev);
	407	disc.number = mdi.disk.number;
	408	disc.raid_disk = mdi.disk.raid_disk;
	409	disc.state = mdi.disk.state;
4d20d744 NB	410	if (dv->writemostly)
4d20d744 NB	411	disc.state \|= 1 << MD_DISK_WRITEMOSTLY;
fe80f49b NB	412	if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
	413	if (verbose >= 0)
	414	fprintf(stderr, Name ": re-added %s\n", dv->devname);
308e1801	415	continue;
fe80f49b NB	416	}
	417	/* fall back on normal-add */
	418	}
892debc8	419	}
4a39c6f2 NB	420	} else {
	421	/* non-persistent. Must ensure that new drive
	422	* is at least array.size big.
	423	*/
7a3be72f	424	if (ldsize/512 < array_size) {
4a39c6f2 NB	425	fprintf(stderr, Name ": %s not large enough to join array\n",
	426	dv->devname);
	427	return 1;
	428	}
892debc8	429	}
7eae7080 NB	430	/* in 2.6.17 and earlier, version-1 superblocks won't
	431	* use the number we write, but will choose a free number.
	432	* we must choose the same free number, which requires
	433	* starting at 'raid_disks' and counting up
	434	*/
3da92f27	435	for (j = array.raid_disks; j< tst->max_devs; j++) {
aa88f531	436	disc.number = j;
682c7051 NB	437	if (ioctl(fd, GET_DISK_INFO, &disc))
	438	break;
	439	if (disc.major==0 && disc.minor==0)
	440	break;
	441	if (disc.state & 8) /* removed */
	442	break;
	443	}
0df46c2a NB	444	disc.major = major(stb.st_rdev);
0df46c2a NB	445	disc.minor = minor(stb.st_rdev);
892debc8 NB	446	disc.number =j;
892debc8 NB	447	disc.state = 0;
fe80f49b	448	if (array.not_persistent==0) {
111d01fc	449	int dfd;
fe80f49b NB	450	if (dv->writemostly)
fe80f49b NB	451	disc.state \|= 1 << MD_DISK_WRITEMOSTLY;
111d01fc NB	452	dfd = open(dv->devname, O_RDWR \| O_EXCL);
	453	tst->ss->add_to_super(tst, &disc, dfd,
	454	dv->devname);
	455	/* write_init_super will close 'dfd' */
	456	if (tst->ss->write_init_super(tst))
fe80f49b NB	457	return 1;
	458	} else if (dv->re_add) {
	459	/* this had better be raid1.
	460	* As we are "--re-add"ing we must find a spare slot
	461	* to fill.
	462	*/
	463	char *used = malloc(array.raid_disks);
	464	memset(used, 0, array.raid_disks);
3da92f27	465	for (j=0; j< tst->max_devs; j++) {
fe80f49b NB	466	mdu_disk_info_t disc2;
	467	disc2.number = j;
	468	if (ioctl(fd, GET_DISK_INFO, &disc2))
	469	continue;
	470	if (disc2.major==0 && disc2.minor==0)
	471	continue;
	472	if (disc2.state & 8) /* removed */
	473	continue;
	474	if (disc2.raid_disk < 0)
	475	continue;
	476	if (disc2.raid_disk > array.raid_disks)
	477	continue;
	478	used[disc2.raid_disk] = 1;
	479	}
	480	for (j=0 ; j<array.raid_disks; j++)
	481	if (!used[j]) {
	482	disc.raid_disk = j;
	483	disc.state \|= (1<<MD_DISK_SYNC);
	484	break;
	485	}
	486	}
d8def61c NB	487	if (dv->writemostly)
d8def61c NB	488	disc.state \|= (1 << MD_DISK_WRITEMOSTLY);
682c7051	489	if (ioctl(fd,ADD_NEW_DISK, &disc)) {
f277ce36 NB	490	fprintf(stderr, Name ": add new device failed for %s as %d: %s\n",
f277ce36 NB	491	dv->devname, j, strerror(errno));
682c7051 NB	492	return 1;
682c7051 NB	493	}
dab6685f NB	494	if (verbose >= 0)
dab6685f NB	495	fprintf(stderr, Name ": added %s\n", dv->devname);
682c7051 NB	496	break;
	497
	498	case 'r':
	499	/* hot remove */
82b27616	500	/* FIXME check that it is a current member */
cd29a5c8	501	if (ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev)) {
b80da661 NB	502	fprintf(stderr, Name ": hot remove failed "
	503	"for %s: %s\n", dnprintable,
	504	strerror(errno));
682c7051 NB	505	return 1;
682c7051 NB	506	}
dab6685f	507	if (verbose >= 0)
b80da661 NB	508	fprintf(stderr, Name ": hot removed %s\n",
b80da661 NB	509	dnprintable);
682c7051 NB	510	break;
	511
	512	case 'f': /* set faulty */
	513	/* FIXME check current member */
cd29a5c8	514	if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) {
b83d95f3	515	fprintf(stderr, Name ": set device faulty failed for %s: %s\n",
b80da661	516	dnprintable, strerror(errno));
682c7051 NB	517	return 1;
682c7051 NB	518	}
dab6685f NB	519	if (verbose >= 0)
dab6685f NB	520	fprintf(stderr, Name ": set %s faulty in %s\n",
b80da661	521	dnprintable, devname);
682c7051 NB	522	break;
	523	}
	524	}
	525	return 0;
aba69144	526
64c4757e	527	}
1f48664b NB	528
	529	int autodetect(void)
	530	{
	531	/* Open any md device, and issue the RAID_AUTORUN ioctl */
	532	int rv = 1;
	533	int fd = dev_open("9:0", O_RDONLY);
	534	if (fd >= 0) {
	535	if (ioctl(fd, RAID_AUTORUN, 0) == 0)
	536	rv = 0;
	537	close(fd);
	538	}
	539	return rv;
	540	}
435d4ebb	541	#endif