[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 save_errno;
	static char buf[4096];

	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) */
			fd = open(dv->devname, O_RDONLY|O_EXCL);
			if (fd < 0) {
				fprintf(stderr, Name ": Cannot open %s: %s\n",
					dv->devname, strerror(errno));
				return 1;
			}
			close(fd);
			if (ioctl(fd, HOT_ADD_DISK, (unsigned long)stb.st_rdev)==0) {
				fprintf(stderr, Name ": hot added %s\n",
					dv->devname);
				continue;
			}
			save_errno = errno;
			if (read(fd, buf, sizeof(buf)) > 0) {
				/* array is active, so don't try to add.
				 * i.e. something is wrong 
				 */
				fprintf(stderr, Name ": hot add failed for %s: %s\n",
					dv->devname, strerror(save_errno));
				return 1;
			}
			/* try ADD_NEW_DISK.
			 * we might be creating, we might be assembling,
			 * it is hard to tell.
			 * set up number/raid_disk/state just
			 * in case
			 */
			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.number =j;
			disc.raid_disk = j;
			disc.state = 0;
			disc.major = major(stb.st_rdev);
			disc.minor = minor(stb.st_rdev);
			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;
cd29a5c8	171	int save_errno;
e0d19036	172	static char buf[4096];
682c7051 NB	173
	174	if (ioctl(fd, GET_ARRAY_INFO, &array)) {
	175	fprintf(stderr, Name ": cannot get array info for %s\n",
	176	devname);
	177	return 1;
	178	}
cd29a5c8 NB	179	for (dv = devlist ; dv; dv=dv->next) {
cd29a5c8 NB	180	if (stat(dv->devname, &stb)) {
682c7051	181	fprintf(stderr, Name ": cannot find %s: %s\n",
cd29a5c8	182	dv->devname, strerror(errno));
682c7051 NB	183	return 1;
	184	}
	185	if ((stb.st_mode & S_IFMT) != S_IFBLK) {
	186	fprintf(stderr, Name ": %s is not a block device.\n",
cd29a5c8	187	dv->devname);
682c7051 NB	188	return 1;
682c7051 NB	189	}
cd29a5c8	190	switch(dv->disposition){
682c7051	191	default:
c913b90e NB	192	fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
c913b90e NB	193	dv->devname, dv->disposition);
682c7051 NB	194	return 1;
	195	case 'a':
	196	/* add the device - hot or cold */
d7eaf49f NB	197	/* Make sure it isn' in use (in 2.6 or later) */
	198	fd = open(dv->devname, O_RDONLY\|O_EXCL);
	199	if (fd < 0) {
	200	fprintf(stderr, Name ": Cannot open %s: %s\n",
	201	dv->devname, strerror(errno));
	202	return 1;
	203	}
	204	close(fd);
cd29a5c8	205	if (ioctl(fd, HOT_ADD_DISK, (unsigned long)stb.st_rdev)==0) {
682c7051	206	fprintf(stderr, Name ": hot added %s\n",
cd29a5c8	207	dv->devname);
682c7051 NB	208	continue;
682c7051 NB	209	}
cd29a5c8 NB	210	save_errno = errno;
	211	if (read(fd, buf, sizeof(buf)) > 0) {
	212	/* array is active, so don't try to add.
	213	* i.e. something is wrong
	214	*/
	215	fprintf(stderr, Name ": hot add failed for %s: %s\n",
	216	dv->devname, strerror(save_errno));
	217	return 1;
	218	}
682c7051 NB	219	/* try ADD_NEW_DISK.
	220	* we might be creating, we might be assembling,
	221	* it is hard to tell.
	222	* set up number/raid_disk/state just
	223	* in case
	224	*/
	225	for (j=0; j<array.nr_disks; j++) {
aa88f531	226	disc.number = j;
682c7051 NB	227	if (ioctl(fd, GET_DISK_INFO, &disc))
	228	break;
	229	if (disc.major==0 && disc.minor==0)
	230	break;
	231	if (disc.state & 8) /* removed */
	232	break;
	233	}
	234	disc.number =j;
	235	disc.raid_disk = j;
	236	disc.state = 0;
0df46c2a NB	237	disc.major = major(stb.st_rdev);
0df46c2a NB	238	disc.minor = minor(stb.st_rdev);
682c7051	239	if (ioctl(fd,ADD_NEW_DISK, &disc)) {
b83d95f3	240	fprintf(stderr, Name ": add new device failed for %s: %s\n",
cd29a5c8	241	dv->devname, strerror(errno));
682c7051 NB	242	return 1;
682c7051 NB	243	}
cd29a5c8	244	fprintf(stderr, Name ": added %s\n", dv->devname);
682c7051 NB	245	break;
	246
	247	case 'r':
	248	/* hot remove */
82b27616	249	/* FIXME check that it is a current member */
cd29a5c8	250	if (ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev)) {
682c7051	251	fprintf(stderr, Name ": hot remove failed for %s: %s\n",
cd29a5c8	252	dv->devname, strerror(errno));
682c7051 NB	253	return 1;
682c7051 NB	254	}
cd29a5c8	255	fprintf(stderr, Name ": hot removed %s\n", dv->devname);
682c7051 NB	256	break;
	257
	258	case 'f': /* set faulty */
	259	/* FIXME check current member */
cd29a5c8	260	if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) {
b83d95f3	261	fprintf(stderr, Name ": set device faulty failed for %s: %s\n",
cd29a5c8	262	dv->devname, strerror(errno));
682c7051 NB	263	return 1;
	264	}
	265	fprintf(stderr, Name ": set %s faulty in %s\n",
cd29a5c8	266	dv->devname, devname);
682c7051 NB	267	break;
	268	}
	269	}
	270	return 0;
	271
64c4757e	272	}