[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)
{
	/* 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)) {
			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)) {
			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' 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 0
			if (array.major_version == 0) {
#else
				if (md_get_version(fd)%100 < 2) {
#endif
				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<array.active_disks+array.spare_disks+ array.failed_disks; 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<array.nr_disks; 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 (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: %s\n",
					dv->devname, 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	}
	74
	75	int Manage_runstop(char *devname, int fd, int runstop)
	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)) {
	84	fprintf(stderr, Name ": stopping device %s failed: %s\n",
	85	devname, strerror(errno));
	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)) {
52826846	109	fprintf(stderr, Name ": fail to stop array %s: %s\n",
682c7051 NB	110	devname, strerror(errno));
	111	return 1;
	112	}
	113	}
	114	return 0;
64c4757e NB	115	}
64c4757e NB	116
dd0781e5 NB	117	int Manage_resize(char *devname, int fd, long long size, int raid_disks)
	118	{
	119	mdu_array_info_t info;
	120	if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
	121	fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
	122	devname, strerror(errno));
	123	return 1;
	124	}
	125	if (size >= 0)
	126	info.size = size;
	127	if (raid_disks > 0)
	128	info.raid_disks = raid_disks;
	129	if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
	130	fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n",
	131	devname, strerror(errno));
	132	return 1;
	133	}
	134	return 0;
	135	}
	136
b5e64645 NB	137	int Manage_reconfig(char *devname, int fd, int layout)
	138	{
	139	mdu_array_info_t info;
	140	if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
	141	fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
	142	devname, strerror(errno));
	143	return 1;
	144	}
	145	info.layout = layout;
	146	printf("layout set to %d\n", info.layout);
	147	if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
	148	fprintf(stderr, Name ": Cannot set layout for %s: %s\n",
	149	devname, strerror(errno));
	150	return 1;
	151	}
	152	return 0;
	153	}
dd0781e5	154
64c4757e	155	int Manage_subdevs(char *devname, int fd,
cd29a5c8 NB	156	mddev_dev_t devlist)
cd29a5c8 NB	157	{
682c7051 NB	158	/* do something to each dev.
	159	* devmode can be
	160	* 'a' - add the device
	161	* try HOT_ADD_DISK
	162	* If that fails EINVAL, try ADD_NEW_DISK
	163	* 'r' - remove the device HOT_REMOVE_DISK
	164	* 'f' - set the device faulty SET_DISK_FAULTY
	165	*/
	166	mdu_array_info_t array;
	167	mdu_disk_info_t disc;
cd29a5c8	168	mddev_dev_t dv;
682c7051	169	struct stat stb;
c913b90e	170	int j;
0fbf459d	171	int tfd;
892debc8 NB	172	struct supertype *st;
892debc8 NB	173	void *dsuper = NULL;
682c7051 NB	174
	175	if (ioctl(fd, GET_ARRAY_INFO, &array)) {
	176	fprintf(stderr, Name ": cannot get array info for %s\n",
	177	devname);
	178	return 1;
	179	}
cd29a5c8 NB	180	for (dv = devlist ; dv; dv=dv->next) {
cd29a5c8 NB	181	if (stat(dv->devname, &stb)) {
682c7051	182	fprintf(stderr, Name ": cannot find %s: %s\n",
cd29a5c8	183	dv->devname, strerror(errno));
682c7051 NB	184	return 1;
	185	}
	186	if ((stb.st_mode & S_IFMT) != S_IFBLK) {
	187	fprintf(stderr, Name ": %s is not a block device.\n",
cd29a5c8	188	dv->devname);
682c7051 NB	189	return 1;
682c7051 NB	190	}
cd29a5c8	191	switch(dv->disposition){
682c7051	192	default:
c913b90e NB	193	fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
c913b90e NB	194	dv->devname, dv->disposition);
682c7051 NB	195	return 1;
	196	case 'a':
	197	/* add the device - hot or cold */
d7eaf49f	198	/* Make sure it isn' in use (in 2.6 or later) */
0fbf459d NB	199	tfd = open(dv->devname, O_RDONLY\|O_EXCL);
0fbf459d NB	200	if (tfd < 0) {
d7eaf49f NB	201	fprintf(stderr, Name ": Cannot open %s: %s\n",
	202	dv->devname, strerror(errno));
	203	return 1;
	204	}
0fbf459d	205	close(tfd);
f5e166fe	206	#if 0
892debc8	207	if (array.major_version == 0) {
f5e166fe NB	208	#else
	209	if (md_get_version(fd)%100 < 2) {
	210	#endif
892debc8 NB	211	if (ioctl(fd, HOT_ADD_DISK,
	212	(unsigned long)stb.st_rdev)==0) {
	213	fprintf(stderr, Name ": hot added %s\n",
	214	dv->devname);
	215	continue;
	216	}
	217
cd29a5c8	218	fprintf(stderr, Name ": hot add failed for %s: %s\n",
892debc8	219	dv->devname, strerror(errno));
cd29a5c8 NB	220	return 1;
cd29a5c8 NB	221	}
892debc8 NB	222
	223	/* need to find a sample superblock to copy, and
	224	* a spare slot to use
682c7051	225	*/
892debc8 NB	226	st = super_by_version(array.major_version,
	227	array.minor_version);
	228	if (!st) {
	229	fprintf(stderr, Name ": unsupport array - version %d.%d\n",
	230	array.major_version, array.minor_version);
	231	return 1;
	232	}
	233	for (j=0; j<array.active_disks+array.spare_disks+ array.failed_disks; j++) {
	234	char *dev;
	235	int dfd;
	236	disc.number = j;
	237	if (ioctl(fd, GET_DISK_INFO, &disc))
	238	continue;
	239	if (disc.major==0 && disc.minor==0)
	240	continue;
	241	if ((disc.state & 4)==0) continue; /* sync */
	242	/* Looks like a good device to try */
	243	dev = map_dev(disc.major, disc.minor);
	244	if (!dev) continue;
	245	dfd = open(dev, O_RDONLY);
	246	if (dfd < 0) continue;
	247	if (st->ss->load_super(st, dfd, &dsuper, NULL)) {
	248	close(dfd);
	249	continue;
	250	}
	251	close(dfd);
	252	break;
	253	}
	254	if (!dsuper) {
	255	fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n");
	256	return 1;
	257	}
682c7051	258	for (j=0; j<array.nr_disks; j++) {
aa88f531	259	disc.number = j;
682c7051 NB	260	if (ioctl(fd, GET_DISK_INFO, &disc))
	261	break;
	262	if (disc.major==0 && disc.minor==0)
	263	break;
	264	if (disc.state & 8) /* removed */
	265	break;
	266	}
0df46c2a NB	267	disc.major = major(stb.st_rdev);
0df46c2a NB	268	disc.minor = minor(stb.st_rdev);
892debc8 NB	269	disc.number =j;
	270	disc.state = 0;
	271	if (st->ss->write_init_super(st, dsuper, &disc, dv->devname))
	272	return 1;
682c7051	273	if (ioctl(fd,ADD_NEW_DISK, &disc)) {
b83d95f3	274	fprintf(stderr, Name ": add new device failed for %s: %s\n",
cd29a5c8	275	dv->devname, strerror(errno));
682c7051 NB	276	return 1;
682c7051 NB	277	}
cd29a5c8	278	fprintf(stderr, Name ": added %s\n", dv->devname);
682c7051 NB	279	break;
	280
	281	case 'r':
	282	/* hot remove */
82b27616	283	/* FIXME check that it is a current member */
cd29a5c8	284	if (ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev)) {
682c7051	285	fprintf(stderr, Name ": hot remove failed for %s: %s\n",
cd29a5c8	286	dv->devname, strerror(errno));
682c7051 NB	287	return 1;
682c7051 NB	288	}
cd29a5c8	289	fprintf(stderr, Name ": hot removed %s\n", dv->devname);
682c7051 NB	290	break;
	291
	292	case 'f': /* set faulty */
	293	/* FIXME check current member */
cd29a5c8	294	if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) {
b83d95f3	295	fprintf(stderr, Name ": set device faulty failed for %s: %s\n",
cd29a5c8	296	dv->devname, strerror(errno));
682c7051 NB	297	return 1;
	298	}
	299	fprintf(stderr, Name ": set %s faulty in %s\n",
cd29a5c8	300	dv->devname, devname);
682c7051 NB	301	break;
	302	}
	303	}
	304	return 0;
	305
64c4757e	306	}