[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;			
}

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;
		}
	} else if (runstop < 0){
		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);
	}
	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
	 *  'f' - set the device faulty SET_DISK_FAULTY
	 */
	mdu_array_info_t array;
	mdu_disk_info_t disc;
	mddev_dev_t dv;
	struct stat stb;
	int j;
	int tfd;
	struct supertype *st;
	void *dsuper = NULL;
	void *osuper = NULL; /* original super */
	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;
	}
	for (dv = devlist ; dv; dv=dv->next) {
		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 - hot or cold */
			st = super_by_version(array.major_version,
					      array.minor_version);
			if (!st) {
				fprintf(stderr, Name ": unsupport array - version %d.%d\n",
					array.major_version, array.minor_version);
				return 1;
			}

			/* 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;
			}
			if (array.not_persistent==0)
				st->ss->load_super(st, tfd, &osuper, NULL);
			/* will use osuper later */
			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<st->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 (st->ss->load_super(st, dfd, &dsuper, NULL)) {
						close(dfd);
						continue;
					}
					close(dfd);
					break;
				}
				if (!dsuper) {
					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.
				 */
				st->ss->uuid_from_super(duuid, dsuper);

				/* re-add doesn't work for version-1 superblocks
				 * before 2.6.18 :-(
				 */
				if (array.major_version == 1 &&
				    get_linux_version() <= 2006018)
					;
				else if (osuper) {
					st->ss->uuid_from_super(ouuid, osuper);
					if (memcmp(duuid, ouuid, sizeof(ouuid))==0) {
						/* look close enough for now.  Kernel
						 * will worry about where a bitmap
						 * based reconstruct is possible
						 */
						struct mdinfo mdi;
						st->ss->getinfo_super(&mdi, osuper);
						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 (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 */
					}
				}
			}
			/* 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< st->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)
					disc.state |= 1 << MD_DISK_WRITEMOSTLY;
				st->ss->add_to_super(dsuper, &disc);
				if (st->ss->write_init_super(st, dsuper, &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< st->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",
					dv->devname, strerror(errno));
				return 1;
			}
			if (verbose >= 0)
				fprintf(stderr, Name ": hot removed %s\n", dv->devname);
			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",
					dv->devname, strerror(errno));
				return 1;
			}
			if (verbose >= 0)
				fprintf(stderr, Name ": set %s faulty in %s\n",
					dv->devname, devname);
			break;
		}
	}
	return 0;
	
}
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;
	48
	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	}
	58
	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	}
	72	return 0;
64c4757e NB	73	}
64c4757e NB	74
91f068bf	75	int Manage_runstop(char *devname, int fd, int runstop, int quiet)
64c4757e	76	{
682c7051 NB	77	/* Run or stop the array. array must already be configured
	78	* required >= 0.90.0
	79	*/
682c7051	80	mdu_param_t param; /* unused */
82b27616 NB	81
	82	if (runstop == -1 && md_get_version(fd) < 9000) {
	83	if (ioctl(fd, STOP_MD, 0)) {
91f068bf NB	84	if (!quiet) fprintf(stderr, Name ": stopping device %s failed: %s\n",
91f068bf NB	85	devname, strerror(errno));
82b27616 NB	86	return 1;
	87	}
	88	}
682c7051 NB	89
	90	if (md_get_version(fd) < 9000) {
	91	fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
	92	return 1;
	93	}
82b27616	94	/*
682c7051 NB	95	if (ioctl(fd, GET_ARRAY_INFO, &array)) {
	96	fprintf(stderr, Name ": %s does not appear to be active.\n",
	97	devname);
	98	return 1;
	99	}
82b27616	100	*/
682c7051 NB	101	if (runstop>0) {
	102	if (ioctl(fd, RUN_ARRAY, &param)) {
	103	fprintf(stderr, Name ": failed to run array %s: %s\n",
	104	devname, strerror(errno));
	105	return 1;
	106	}
	107	} else if (runstop < 0){
	108	if (ioctl(fd, STOP_ARRAY, NULL)) {
ab56093f	109	if (quiet==0)
91f068bf NB	110	fprintf(stderr, Name ": fail to stop array %s: %s\n",
91f068bf NB	111	devname, strerror(errno));
682c7051 NB	112	return 1;
682c7051 NB	113	}
ab56093f NB	114	if (quiet <= 0)
ab56093f NB	115	fprintf(stderr, Name ": stopped %s\n", devname);
682c7051 NB	116	}
682c7051 NB	117	return 0;
64c4757e NB	118	}
64c4757e NB	119
dd0781e5 NB	120	int Manage_resize(char *devname, int fd, long long size, int raid_disks)
	121	{
	122	mdu_array_info_t info;
	123	if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
	124	fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
	125	devname, strerror(errno));
	126	return 1;
	127	}
	128	if (size >= 0)
	129	info.size = size;
	130	if (raid_disks > 0)
	131	info.raid_disks = raid_disks;
	132	if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
	133	fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n",
	134	devname, strerror(errno));
	135	return 1;
	136	}
	137	return 0;
	138	}
	139
b5e64645 NB	140	int Manage_reconfig(char *devname, int fd, int layout)
	141	{
	142	mdu_array_info_t info;
	143	if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
	144	fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
	145	devname, strerror(errno));
	146	return 1;
	147	}
	148	info.layout = layout;
	149	printf("layout set to %d\n", info.layout);
	150	if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
	151	fprintf(stderr, Name ": Cannot set layout for %s: %s\n",
	152	devname, strerror(errno));
	153	return 1;
	154	}
	155	return 0;
	156	}
dd0781e5	157
64c4757e	158	int Manage_subdevs(char *devname, int fd,
dab6685f	159	mddev_dev_t devlist, int verbose)
cd29a5c8	160	{
682c7051 NB	161	/* do something to each dev.
	162	* devmode can be
	163	* 'a' - add the device
	164	* try HOT_ADD_DISK
	165	* If that fails EINVAL, try ADD_NEW_DISK
	166	* 'r' - remove the device HOT_REMOVE_DISK
	167	* 'f' - set the device faulty SET_DISK_FAULTY
	168	*/
	169	mdu_array_info_t array;
	170	mdu_disk_info_t disc;
cd29a5c8	171	mddev_dev_t dv;
682c7051	172	struct stat stb;
c913b90e	173	int j;
0fbf459d	174	int tfd;
892debc8 NB	175	struct supertype *st;
892debc8 NB	176	void *dsuper = NULL;
fe80f49b NB	177	void osuper = NULL; / original super */
	178	int duuid[4];
	179	int ouuid[4];
682c7051 NB	180
	181	if (ioctl(fd, GET_ARRAY_INFO, &array)) {
	182	fprintf(stderr, Name ": cannot get array info for %s\n",
	183	devname);
	184	return 1;
	185	}
cd29a5c8 NB	186	for (dv = devlist ; dv; dv=dv->next) {
cd29a5c8 NB	187	if (stat(dv->devname, &stb)) {
682c7051	188	fprintf(stderr, Name ": cannot find %s: %s\n",
cd29a5c8	189	dv->devname, strerror(errno));
682c7051 NB	190	return 1;
	191	}
	192	if ((stb.st_mode & S_IFMT) != S_IFBLK) {
	193	fprintf(stderr, Name ": %s is not a block device.\n",
cd29a5c8	194	dv->devname);
682c7051 NB	195	return 1;
682c7051 NB	196	}
cd29a5c8	197	switch(dv->disposition){
682c7051	198	default:
c913b90e NB	199	fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
c913b90e NB	200	dv->devname, dv->disposition);
682c7051 NB	201	return 1;
	202	case 'a':
	203	/* add the device - hot or cold */
fe80f49b NB	204	st = super_by_version(array.major_version,
	205	array.minor_version);
	206	if (!st) {
	207	fprintf(stderr, Name ": unsupport array - version %d.%d\n",
	208	array.major_version, array.minor_version);
	209	return 1;
	210	}
	211
f277ce36	212	/* Make sure it isn't in use (in 2.6 or later) */
0fbf459d NB	213	tfd = open(dv->devname, O_RDONLY\|O_EXCL);
0fbf459d NB	214	if (tfd < 0) {
d7eaf49f NB	215	fprintf(stderr, Name ": Cannot open %s: %s\n",
	216	dv->devname, strerror(errno));
	217	return 1;
	218	}
fe80f49b NB	219	if (array.not_persistent==0)
	220	st->ss->load_super(st, tfd, &osuper, NULL);
	221	/* will use osuper later */
0fbf459d	222	close(tfd);
fe80f49b	223
60d9a174 NB	224	if (array.major_version == 0 &&
60d9a174 NB	225	md_get_version(fd)%100 < 2) {
892debc8 NB	226	if (ioctl(fd, HOT_ADD_DISK,
892debc8 NB	227	(unsigned long)stb.st_rdev)==0) {
dab6685f NB	228	if (verbose >= 0)
	229	fprintf(stderr, Name ": hot added %s\n",
	230	dv->devname);
892debc8 NB	231	continue;
	232	}
	233
cd29a5c8	234	fprintf(stderr, Name ": hot add failed for %s: %s\n",
892debc8	235	dv->devname, strerror(errno));
cd29a5c8 NB	236	return 1;
cd29a5c8 NB	237	}
892debc8	238
fe80f49b NB	239	if (array.not_persistent == 0) {
	240
	241	/* need to find a sample superblock to copy, and
	242	* a spare slot to use
	243	*/
	244	for (j=0; j<st->max_devs; j++) {
	245	char *dev;
	246	int dfd;
	247	disc.number = j;
	248	if (ioctl(fd, GET_DISK_INFO, &disc))
	249	continue;
	250	if (disc.major==0 && disc.minor==0)
	251	continue;
	252	if ((disc.state & 4)==0) continue; /* sync */
	253	/* Looks like a good device to try */
16c6fa80	254	dev = map_dev(disc.major, disc.minor, 1);
fe80f49b	255	if (!dev) continue;
16c6fa80	256	dfd = dev_open(dev, O_RDONLY);
fe80f49b NB	257	if (dfd < 0) continue;
	258	if (st->ss->load_super(st, dfd, &dsuper, NULL)) {
	259	close(dfd);
	260	continue;
	261	}
892debc8	262	close(dfd);
fe80f49b NB	263	break;
	264	}
	265	if (!dsuper) {
	266	fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n");
	267	return 1;
	268	}
	269	/* Possibly this device was recently part of the array
	270	* and was temporarily removed, and is now being re-added.
	271	* If so, we can simply re-add it.
	272	*/
	273	st->ss->uuid_from_super(duuid, dsuper);
7eae7080 NB	274
	275	/* re-add doesn't work for version-1 superblocks
	276	* before 2.6.18 :-(
	277	*/
	278	if (array.major_version == 1 &&
	279	get_linux_version() <= 2006018)
	280	;
	281	else if (osuper) {
fe80f49b NB	282	st->ss->uuid_from_super(ouuid, osuper);
	283	if (memcmp(duuid, ouuid, sizeof(ouuid))==0) {
	284	/* look close enough for now. Kernel
	285	* will worry about where a bitmap
	286	* based reconstruct is possible
	287	*/
	288	struct mdinfo mdi;
31317663	289	st->ss->getinfo_super(&mdi, osuper);
fe80f49b NB	290	disc.major = major(stb.st_rdev);
	291	disc.minor = minor(stb.st_rdev);
	292	disc.number = mdi.disk.number;
	293	disc.raid_disk = mdi.disk.raid_disk;
	294	disc.state = mdi.disk.state;
	295	if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
	296	if (verbose >= 0)
	297	fprintf(stderr, Name ": re-added %s\n", dv->devname);
308e1801	298	continue;
fe80f49b NB	299	}
	300	/* fall back on normal-add */
	301	}
892debc8	302	}
892debc8	303	}
7eae7080 NB	304	/* in 2.6.17 and earlier, version-1 superblocks won't
	305	* use the number we write, but will choose a free number.
	306	* we must choose the same free number, which requires
	307	* starting at 'raid_disks' and counting up
	308	*/
	309	for (j = array.raid_disks; j< st->max_devs; j++) {
aa88f531	310	disc.number = j;
682c7051 NB	311	if (ioctl(fd, GET_DISK_INFO, &disc))
	312	break;
	313	if (disc.major==0 && disc.minor==0)
	314	break;
	315	if (disc.state & 8) /* removed */
	316	break;
	317	}
0df46c2a NB	318	disc.major = major(stb.st_rdev);
0df46c2a NB	319	disc.minor = minor(stb.st_rdev);
892debc8 NB	320	disc.number =j;
892debc8 NB	321	disc.state = 0;
fe80f49b NB	322	if (array.not_persistent==0) {
	323	if (dv->writemostly)
	324	disc.state \|= 1 << MD_DISK_WRITEMOSTLY;
	325	st->ss->add_to_super(dsuper, &disc);
1bf4e2d9	326	if (st->ss->write_init_super(st, dsuper, &disc, dv->devname))
fe80f49b NB	327	return 1;
	328	} else if (dv->re_add) {
	329	/* this had better be raid1.
	330	* As we are "--re-add"ing we must find a spare slot
	331	* to fill.
	332	*/
	333	char *used = malloc(array.raid_disks);
	334	memset(used, 0, array.raid_disks);
	335	for (j=0; j< st->max_devs; j++) {
	336	mdu_disk_info_t disc2;
	337	disc2.number = j;
	338	if (ioctl(fd, GET_DISK_INFO, &disc2))
	339	continue;
	340	if (disc2.major==0 && disc2.minor==0)
	341	continue;
	342	if (disc2.state & 8) /* removed */
	343	continue;
	344	if (disc2.raid_disk < 0)
	345	continue;
	346	if (disc2.raid_disk > array.raid_disks)
	347	continue;
	348	used[disc2.raid_disk] = 1;
	349	}
	350	for (j=0 ; j<array.raid_disks; j++)
	351	if (!used[j]) {
	352	disc.raid_disk = j;
	353	disc.state \|= (1<<MD_DISK_SYNC);
	354	break;
	355	}
	356	}
d8def61c NB	357	if (dv->writemostly)
d8def61c NB	358	disc.state \|= (1 << MD_DISK_WRITEMOSTLY);
682c7051	359	if (ioctl(fd,ADD_NEW_DISK, &disc)) {
f277ce36 NB	360	fprintf(stderr, Name ": add new device failed for %s as %d: %s\n",
f277ce36 NB	361	dv->devname, j, strerror(errno));
682c7051 NB	362	return 1;
682c7051 NB	363	}
dab6685f NB	364	if (verbose >= 0)
dab6685f NB	365	fprintf(stderr, Name ": added %s\n", dv->devname);
682c7051 NB	366	break;
	367
	368	case 'r':
	369	/* hot remove */
82b27616	370	/* FIXME check that it is a current member */
cd29a5c8	371	if (ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev)) {
682c7051	372	fprintf(stderr, Name ": hot remove failed for %s: %s\n",
cd29a5c8	373	dv->devname, strerror(errno));
682c7051 NB	374	return 1;
682c7051 NB	375	}
dab6685f NB	376	if (verbose >= 0)
dab6685f NB	377	fprintf(stderr, Name ": hot removed %s\n", dv->devname);
682c7051 NB	378	break;
	379
	380	case 'f': /* set faulty */
	381	/* FIXME check current member */
cd29a5c8	382	if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) {
b83d95f3	383	fprintf(stderr, Name ": set device faulty failed for %s: %s\n",
cd29a5c8	384	dv->devname, strerror(errno));
682c7051 NB	385	return 1;
682c7051 NB	386	}
dab6685f NB	387	if (verbose >= 0)
	388	fprintf(stderr, Name ": set %s faulty in %s\n",
	389	dv->devname, devname);
682c7051 NB	390	break;
	391	}
	392	}
	393	return 0;
	394
64c4757e	395	}