[thirdparty/mdadm.git] / Manage.c

/*
 * mdadm - manage Linux "md" devices aka RAID arrays.
 *
 * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
 *
 *
 *    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)
				fprintf(stderr, Name ": fail to stop array %s: %s\n",
					devname, strerror(errno));
			return 1;
		}
	}
	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)
{
	/* 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;

	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 */
			/* 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;
			}
			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) {
					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;
			}

			/* need to find a sample superblock to copy, and
			 * a spare slot to use 
			 */
			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;
			}
			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);
				if (!dev) continue;
				dfd = 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;
			}
			for (j=0; 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;
			st->ss->add_to_super(dsuper, &disc);
			if (st->ss->write_init_super(st, dsuper, &disc, dv->devname))
				return 1;
			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;
			}
			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;
			}
			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;
			}
			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	*
cd29a5c8	4	* Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
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)) {
91f068bf NB	109	if (!quiet)
	110	fprintf(stderr, Name ": fail to stop array %s: %s\n",
	111	devname, strerror(errno));
682c7051 NB	112	return 1;
	113	}
	114	}
	115	return 0;
64c4757e NB	116	}
64c4757e NB	117
dd0781e5 NB	118	int Manage_resize(char *devname, int fd, long long size, int raid_disks)
	119	{
	120	mdu_array_info_t info;
	121	if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
	122	fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
	123	devname, strerror(errno));
	124	return 1;
	125	}
	126	if (size >= 0)
	127	info.size = size;
	128	if (raid_disks > 0)
	129	info.raid_disks = raid_disks;
	130	if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
	131	fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n",
	132	devname, strerror(errno));
	133	return 1;
	134	}
	135	return 0;
	136	}
	137
b5e64645 NB	138	int Manage_reconfig(char *devname, int fd, int layout)
	139	{
	140	mdu_array_info_t info;
	141	if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
	142	fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
	143	devname, strerror(errno));
	144	return 1;
	145	}
	146	info.layout = layout;
	147	printf("layout set to %d\n", info.layout);
	148	if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
	149	fprintf(stderr, Name ": Cannot set layout for %s: %s\n",
	150	devname, strerror(errno));
	151	return 1;
	152	}
	153	return 0;
	154	}
dd0781e5	155
64c4757e	156	int Manage_subdevs(char *devname, int fd,
cd29a5c8 NB	157	mddev_dev_t devlist)
cd29a5c8 NB	158	{
682c7051 NB	159	/* do something to each dev.
	160	* devmode can be
	161	* 'a' - add the device
	162	* try HOT_ADD_DISK
	163	* If that fails EINVAL, try ADD_NEW_DISK
	164	* 'r' - remove the device HOT_REMOVE_DISK
	165	* 'f' - set the device faulty SET_DISK_FAULTY
	166	*/
	167	mdu_array_info_t array;
	168	mdu_disk_info_t disc;
cd29a5c8	169	mddev_dev_t dv;
682c7051	170	struct stat stb;
c913b90e	171	int j;
0fbf459d	172	int tfd;
892debc8 NB	173	struct supertype *st;
892debc8 NB	174	void *dsuper = NULL;
682c7051 NB	175
	176	if (ioctl(fd, GET_ARRAY_INFO, &array)) {
	177	fprintf(stderr, Name ": cannot get array info for %s\n",
	178	devname);
	179	return 1;
	180	}
cd29a5c8 NB	181	for (dv = devlist ; dv; dv=dv->next) {
cd29a5c8 NB	182	if (stat(dv->devname, &stb)) {
682c7051	183	fprintf(stderr, Name ": cannot find %s: %s\n",
cd29a5c8	184	dv->devname, strerror(errno));
682c7051 NB	185	return 1;
	186	}
	187	if ((stb.st_mode & S_IFMT) != S_IFBLK) {
	188	fprintf(stderr, Name ": %s is not a block device.\n",
cd29a5c8	189	dv->devname);
682c7051 NB	190	return 1;
682c7051 NB	191	}
cd29a5c8	192	switch(dv->disposition){
682c7051	193	default:
c913b90e NB	194	fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
c913b90e NB	195	dv->devname, dv->disposition);
682c7051 NB	196	return 1;
	197	case 'a':
	198	/* add the device - hot or cold */
f277ce36	199	/* Make sure it isn't in use (in 2.6 or later) */
0fbf459d NB	200	tfd = open(dv->devname, O_RDONLY\|O_EXCL);
0fbf459d NB	201	if (tfd < 0) {
d7eaf49f NB	202	fprintf(stderr, Name ": Cannot open %s: %s\n",
	203	dv->devname, strerror(errno));
	204	return 1;
	205	}
0fbf459d	206	close(tfd);
60d9a174 NB	207	if (array.major_version == 0 &&
60d9a174 NB	208	md_get_version(fd)%100 < 2) {
892debc8 NB	209	if (ioctl(fd, HOT_ADD_DISK,
	210	(unsigned long)stb.st_rdev)==0) {
	211	fprintf(stderr, Name ": hot added %s\n",
	212	dv->devname);
	213	continue;
	214	}
	215
cd29a5c8	216	fprintf(stderr, Name ": hot add failed for %s: %s\n",
892debc8	217	dv->devname, strerror(errno));
cd29a5c8 NB	218	return 1;
cd29a5c8 NB	219	}
892debc8 NB	220
	221	/* need to find a sample superblock to copy, and
	222	* a spare slot to use
682c7051	223	*/
892debc8 NB	224	st = super_by_version(array.major_version,
	225	array.minor_version);
	226	if (!st) {
	227	fprintf(stderr, Name ": unsupport array - version %d.%d\n",
	228	array.major_version, array.minor_version);
	229	return 1;
	230	}
f277ce36	231	for (j=0; j<st->max_devs; j++) {
892debc8 NB	232	char *dev;
	233	int dfd;
	234	disc.number = j;
	235	if (ioctl(fd, GET_DISK_INFO, &disc))
	236	continue;
	237	if (disc.major==0 && disc.minor==0)
	238	continue;
	239	if ((disc.state & 4)==0) continue; /* sync */
	240	/* Looks like a good device to try */
	241	dev = map_dev(disc.major, disc.minor);
	242	if (!dev) continue;
	243	dfd = open(dev, O_RDONLY);
	244	if (dfd < 0) continue;
	245	if (st->ss->load_super(st, dfd, &dsuper, NULL)) {
	246	close(dfd);
	247	continue;
	248	}
	249	close(dfd);
	250	break;
	251	}
	252	if (!dsuper) {
	253	fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n");
	254	return 1;
	255	}
f277ce36	256	for (j=0; j< st->max_devs; j++) {
aa88f531	257	disc.number = j;
682c7051 NB	258	if (ioctl(fd, GET_DISK_INFO, &disc))
	259	break;
	260	if (disc.major==0 && disc.minor==0)
	261	break;
	262	if (disc.state & 8) /* removed */
	263	break;
	264	}
0df46c2a NB	265	disc.major = major(stb.st_rdev);
0df46c2a NB	266	disc.minor = minor(stb.st_rdev);
892debc8 NB	267	disc.number =j;
892debc8 NB	268	disc.state = 0;
f277ce36	269	st->ss->add_to_super(dsuper, &disc);
892debc8 NB	270	if (st->ss->write_init_super(st, dsuper, &disc, dv->devname))
892debc8 NB	271	return 1;
682c7051	272	if (ioctl(fd,ADD_NEW_DISK, &disc)) {
f277ce36 NB	273	fprintf(stderr, Name ": add new device failed for %s as %d: %s\n",
f277ce36 NB	274	dv->devname, j, strerror(errno));
682c7051 NB	275	return 1;
682c7051 NB	276	}
cd29a5c8	277	fprintf(stderr, Name ": added %s\n", dv->devname);
682c7051 NB	278	break;
	279
	280	case 'r':
	281	/* hot remove */
82b27616	282	/* FIXME check that it is a current member */
cd29a5c8	283	if (ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev)) {
682c7051	284	fprintf(stderr, Name ": hot remove failed for %s: %s\n",
cd29a5c8	285	dv->devname, strerror(errno));
682c7051 NB	286	return 1;
682c7051 NB	287	}
cd29a5c8	288	fprintf(stderr, Name ": hot removed %s\n", dv->devname);
682c7051 NB	289	break;
	290
	291	case 'f': /* set faulty */
	292	/* FIXME check current member */
cd29a5c8	293	if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) {
b83d95f3	294	fprintf(stderr, Name ": set device faulty failed for %s: %s\n",
cd29a5c8	295	dv->devname, strerror(errno));
682c7051 NB	296	return 1;
	297	}
	298	fprintf(stderr, Name ": set %s faulty in %s\n",
cd29a5c8	299	dv->devname, devname);
682c7051 NB	300	break;
	301	}
	302	}
	303	return 0;
	304
64c4757e	305	}