[thirdparty/mdadm.git] / Detail.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_p.h"
#include	"md_u.h"

int Detail(char *dev, int brief, int test)
{
	/*
	 * Print out details for an md array by using
	 * GET_ARRAY_INFO and GET_DISK_INFO ioctl calls
	 */

	int fd = open(dev, O_RDONLY, 0);
	int vers;
	mdu_array_info_t array;
	int d;
	time_t atime;
	char *c;
	char *devices = NULL;
	int spares = 0;
	struct stat stb;
	int is_26 = get_linux_version() >= 2006000;
	int is_rebuilding = 0;
	int failed = 0;

	mdp_super_t super;
	int have_super = 0;
	int rv = test ? 4 : 1;

	if (fd < 0) {
		fprintf(stderr, Name ": cannot open %s: %s\n",
			dev, strerror(errno));
		return rv;
	}
	vers = md_get_version(fd);
	if (vers < 0) {
		fprintf(stderr, Name ": %s does not appear to be an md device\n",
			dev);
		close(fd);
		return rv;
	}
	if (vers < 9000) {
		fprintf(stderr, Name ": cannot get detail for md device %s: driver version too old.\n",
			dev);
		close(fd);
		return rv;
	}
	if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
		if (errno == ENODEV)
			fprintf(stderr, Name ": md device %s does not appear to be active.\n",
				dev);
		else
			fprintf(stderr, Name ": cannot get array detail for %s: %s\n",
				dev, strerror(errno));
		close(fd);
		return rv;
	}
	if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
		stb.st_rdev = 0;
	rv = 0;

	/* try to load a superblock */
	for (d= 0; d<MD_SB_DISKS; d++) {
		mdu_disk_info_t disk;
		char *dv;
		disk.number = d;
		if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
			continue;
		if (d >= array.raid_disks &&
		    disk.major == 0 &&
		    disk.minor == 0)
			continue;
		if ((dv=map_dev(disk.major, disk.minor))) {
			if (!have_super && (disk.state & (1<<MD_DISK_ACTIVE))) {
				/* try to read the superblock from this device
				 * to get more info
				 */
				int fd2 = open(dv, O_RDONLY);
				if (fd2 >=0 &&
				    load_super(fd2, &super) ==0 &&
				    (unsigned long)super.ctime == (unsigned long)array.ctime &&
				    (unsigned int)super.level == (unsigned int)array.level)
					have_super = 1;
				if (fd2 >= 0) close(fd2);
			}
		}
	}

	/* Ok, we have some info to print... */
	c = map_num(pers, array.level);
	if (brief) 
		printf("ARRAY %s level=%s num-devices=%d", dev, c?c:"-unknown-",array.raid_disks );
	else {
		unsigned long array_size;
		unsigned long long larray_size;
		struct mdstat_ent *ms = mdstat_read(0);
		struct mdstat_ent *e;
		int devnum = array.md_minor;
		if (major(stb.st_rdev) != MD_MAJOR)
			devnum = -1 - devnum;

		for (e=ms; e; e=e->next)
			if (e->devnum == devnum)
				break;
#ifdef BLKGETSIZE64
		if (ioctl(fd, BLKGETSIZE64, &larray_size)==0)
			;
		else
#endif
			if (ioctl(fd, BLKGETSIZE, &array_size)==0) {
				larray_size = array_size;
				larray_size <<= 9;
			}
		
		else larray_size = 0;

		printf("%s:\n", dev);
		printf("        Version : %02d.%02d.%02d\n",
		       array.major_version, array.minor_version, array.patch_version);
		atime = array.ctime;
		printf("  Creation Time : %.24s\n", ctime(&atime));
		printf("     Raid Level : %s\n", c?c:"-unknown-");
		if (larray_size)
			printf("     Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
		if (array.level >= 1)
			printf("    Device Size : %d%s\n", array.size, human_size((long long)array.size<<10));
		printf("   Raid Devices : %d\n", array.raid_disks);
		printf("  Total Devices : %d\n", array.nr_disks);
		printf("Preferred Minor : %d\n", array.md_minor);
		printf("    Persistence : Superblock is %spersistent\n",
		       array.not_persistent?"not ":"");
		printf("\n");
		atime = array.utime;
		printf("    Update Time : %.24s\n", ctime(&atime));
		printf("          State : %s%s%s\n",
		       (array.state&(1<<MD_SB_CLEAN))?"clean":"active",
		       array.active_disks < array.raid_disks? ", degraded":"",
		       (!e || e->percent < 0) ? "" :
		        (e->resync) ? ", resyncing": ", recovering");
		printf(" Active Devices : %d\n", array.active_disks);
		printf("Working Devices : %d\n", array.working_disks);
		printf(" Failed Devices : %d\n", array.failed_disks);
		printf("  Spare Devices : %d\n", array.spare_disks);
		printf("\n");
		if (array.level == 5) {
			c = map_num(r5layout, array.layout);
			printf("         Layout : %s\n", c?c:"-unknown-");
		}
		if (array.level == 10) {
			printf("         Layout : near=%d, far=%d\n", 
			       array.layout&255, (array.layout>>8)&255);
		}
		switch (array.level) {
		case 0:
		case 4:
		case 5:
		case 10:
		case 6:
			printf("     Chunk Size : %dK\n\n", array.chunk_size/1024);
			break;
		case -1:
			printf("       Rounding : %dK\n\n", array.chunk_size/1024);
			break;
		default: break;
		}
	
		if (e && e->percent >= 0) {
			printf(" Rebuild Status : %d%% complete\n\n", e->percent);
			is_rebuilding = 1;
		}
		free_mdstat(ms);

		if (have_super) {
			printf("           UUID : ");
			if (super.minor_version >= 90)
				printf("%08x:%08x:%08x:%08x", super.set_uuid0, super.set_uuid1,
				       super.set_uuid2, super.set_uuid3);
			else
				printf("%08x", super.set_uuid0);
			printf("\n         Events : %d.%d\n\n", super.events_hi, super.events_lo);
		}

		printf("    Number   Major   Minor   RaidDevice State\n");
	}
	for (d= 0; d<MD_SB_DISKS; d++) {
		mdu_disk_info_t disk;
		char *dv;
		disk.number = d;
		if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
			if (d < array.raid_disks)
				fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
					d, strerror(errno));
			continue;
		}
		if (d >= array.raid_disks &&
		    disk.major == 0 &&
		    disk.minor == 0)
			continue;
		if (!brief) {
			if (disk.number == array.raid_disks) printf("\n");
			if (disk.raid_disk < 0)
				printf("   %5d   %5d    %5d        -     ", 
				       disk.number, disk.major, disk.minor);
			else
				printf("   %5d   %5d    %5d    %5d     ", 
				       disk.number, disk.major, disk.minor, disk.raid_disk);
			if (disk.state & (1<<MD_DISK_FAULTY)) { 
				printf(" faulty"); 
				if (disk.raid_disk < array.raid_disks &&
				    disk.raid_disk >= 0)
					failed++;
			}
			if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
			if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
			if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
			if (disk.state == 0) printf(" spare");
			if (disk.state == 0) {
				if (is_26) {
					if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
						printf(" rebuilding");
				} else if (is_rebuilding && failed) {
					/* Taking a bit of a risk here, we remove the
					 * device from the array, and then put it back.
					 * If this fails, we are rebuilding
					 */
					int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
					if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
					if (err && errno ==  EBUSY)
						printf(" rebuilding");
				}
			}
		}
		if (disk.state == 0) spares++;
		if (test && d < array.raid_disks && disk.state & (1<<MD_DISK_FAULTY)) {
			if ((rv & 1) && (array.level ==4 || array.level == 5))
				rv |= 2;
			rv |= 1;
		}
		if ((dv=map_dev(disk.major, disk.minor))) {
			if (brief) {
				if (devices) {
					devices = realloc(devices,
							  strlen(devices)+1+strlen(dv)+1);
					strcat(strcat(devices,","),dv);
				} else
					devices = strdup(dv);
			} else
				printf("   %s", dv);
		}
		if (!brief) printf("\n");
	}
	if (spares && brief) printf(" spares=%d", spares);
	if (have_super && brief) {
		printf(" UUID=");
	    	if (super.minor_version >= 90)
			printf("%08x:%08x:%08x:%08x", super.set_uuid0, super.set_uuid1,
			       super.set_uuid2, super.set_uuid3);
		else
			printf("%08x", super.set_uuid0);
	}
	if (brief && devices) printf("\n   devices=%s", devices);
	if (brief) printf("\n");
	if (test && (rv&2)) rv &= ~1;
	close(fd);
	return rv;
}
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"
64c4757e NB	31	#include "md_p.h"
	32	#include "md_u.h"
	33
feb716e9	34	int Detail(char *dev, int brief, int test)
64c4757e NB	35	{
	36	/*
	37	* Print out details for an md array by using
	38	* GET_ARRAY_INFO and GET_DISK_INFO ioctl calls
	39	*/
	40
	41	int fd = open(dev, O_RDONLY, 0);
	42	int vers;
	43	mdu_array_info_t array;
	44	int d;
	45	time_t atime;
682c7051	46	char *c;
d013a55e	47	char *devices = NULL;
feb716e9	48	int spares = 0;
dd0781e5	49	struct stat stb;
e5329c37 NB	50	int is_26 = get_linux_version() >= 2006000;
	51	int is_rebuilding = 0;
	52	int failed = 0;
64c4757e	53
82b27616 NB	54	mdp_super_t super;
82b27616 NB	55	int have_super = 0;
feb716e9	56	int rv = test ? 4 : 1;
82b27616	57
64c4757e	58	if (fd < 0) {
682c7051	59	fprintf(stderr, Name ": cannot open %s: %s\n",
64c4757e	60	dev, strerror(errno));
feb716e9	61	return rv;
64c4757e NB	62	}
	63	vers = md_get_version(fd);
	64	if (vers < 0) {
682c7051	65	fprintf(stderr, Name ": %s does not appear to be an md device\n",
64c4757e NB	66	dev);
64c4757e NB	67	close(fd);
feb716e9	68	return rv;
64c4757e	69	}
682c7051 NB	70	if (vers < 9000) {
682c7051 NB	71	fprintf(stderr, Name ": cannot get detail for md device %s: driver version too old.\n",
64c4757e NB	72	dev);
64c4757e NB	73	close(fd);
feb716e9	74	return rv;
64c4757e NB	75	}
	76	if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
	77	if (errno == ENODEV)
682c7051	78	fprintf(stderr, Name ": md device %s does not appear to be active.\n",
64c4757e NB	79	dev);
64c4757e NB	80	else
682c7051	81	fprintf(stderr, Name ": cannot get array detail for %s: %s\n",
64c4757e NB	82	dev, strerror(errno));
64c4757e NB	83	close(fd);
feb716e9	84	return rv;
64c4757e	85	}
dd0781e5 NB	86	if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
dd0781e5 NB	87	stb.st_rdev = 0;
feb716e9	88	rv = 0;
e5329c37 NB	89
	90	/* try to load a superblock */
	91	for (d= 0; d<MD_SB_DISKS; d++) {
	92	mdu_disk_info_t disk;
	93	char *dv;
	94	disk.number = d;
	95	if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
	96	continue;
	97	if (d >= array.raid_disks &&
	98	disk.major == 0 &&
	99	disk.minor == 0)
	100	continue;
	101	if ((dv=map_dev(disk.major, disk.minor))) {
	102	if (!have_super && (disk.state & (1<<MD_DISK_ACTIVE))) {
	103	/* try to read the superblock from this device
	104	* to get more info
	105	*/
	106	int fd2 = open(dv, O_RDONLY);
	107	if (fd2 >=0 &&
	108	load_super(fd2, &super) ==0 &&
	109	(unsigned long)super.ctime == (unsigned long)array.ctime &&
	110	(unsigned int)super.level == (unsigned int)array.level)
	111	have_super = 1;
	112	if (fd2 >= 0) close(fd2);
	113	}
	114	}
	115	}
	116
64c4757e	117	/* Ok, we have some info to print... */
682c7051	118	c = map_num(pers, array.level);
cd29a5c8	119	if (brief)
b83d95f3	120	printf("ARRAY %s level=%s num-devices=%d", dev, c?c:"-unknown-",array.raid_disks );
cd29a5c8	121	else {
e0d19036 NB	122	unsigned long array_size;
e0d19036 NB	123	unsigned long long larray_size;
dd0781e5 NB	124	struct mdstat_ent *ms = mdstat_read(0);
	125	struct mdstat_ent *e;
	126	int devnum = array.md_minor;
0df46c2a	127	if (major(stb.st_rdev) != MD_MAJOR)
dd0781e5 NB	128	devnum = -1 - devnum;
	129
	130	for (e=ms; e; e=e->next)
	131	if (e->devnum == devnum)
	132	break;
11a3e71d	133	#ifdef BLKGETSIZE64
56eb10c0 NB	134	if (ioctl(fd, BLKGETSIZE64, &larray_size)==0)
56eb10c0 NB	135	;
11a3e71d NB	136	else
11a3e71d NB	137	#endif
b83d95f3 NB	138	if (ioctl(fd, BLKGETSIZE, &array_size)==0) {
	139	larray_size = array_size;
	140	larray_size <<= 9;
	141	}
	142
56eb10c0 NB	143	else larray_size = 0;
56eb10c0 NB	144
cd29a5c8 NB	145	printf("%s:\n", dev);
	146	printf(" Version : %02d.%02d.%02d\n",
	147	array.major_version, array.minor_version, array.patch_version);
	148	atime = array.ctime;
	149	printf(" Creation Time : %.24s\n", ctime(&atime));
	150	printf(" Raid Level : %s\n", c?c:"-unknown-");
56eb10c0	151	if (larray_size)
dd0781e5	152	printf(" Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
cd29a5c8	153	if (array.level >= 1)
56eb10c0	154	printf(" Device Size : %d%s\n", array.size, human_size((long long)array.size<<10));
b83d95f3 NB	155	printf(" Raid Devices : %d\n", array.raid_disks);
b83d95f3 NB	156	printf(" Total Devices : %d\n", array.nr_disks);
cd29a5c8	157	printf("Preferred Minor : %d\n", array.md_minor);
b83d95f3	158	printf(" Persistence : Superblock is %spersistent\n",
cd29a5c8 NB	159	array.not_persistent?"not ":"");
	160	printf("\n");
	161	atime = array.utime;
	162	printf(" Update Time : %.24s\n", ctime(&atime));
dd0781e5	163	printf(" State : %s%s%s\n",
182661f4	164	(array.state&(1<<MD_SB_CLEAN))?"clean":"active",
dd0781e5	165	array.active_disks < array.raid_disks? ", degraded":"",
e5329c37 NB	166	(!e \|\| e->percent < 0) ? "" :
e5329c37 NB	167	(e->resync) ? ", resyncing": ", recovering");
b83d95f3 NB	168	printf(" Active Devices : %d\n", array.active_disks);
	169	printf("Working Devices : %d\n", array.working_disks);
	170	printf(" Failed Devices : %d\n", array.failed_disks);
	171	printf(" Spare Devices : %d\n", array.spare_disks);
cd29a5c8 NB	172	printf("\n");
	173	if (array.level == 5) {
	174	c = map_num(r5layout, array.layout);
	175	printf(" Layout : %s\n", c?c:"-unknown-");
	176	}
e5329c37 NB	177	if (array.level == 10) {
	178	printf(" Layout : near=%d, far=%d\n",
	179	array.layout&255, (array.layout>>8)&255);
	180	}
cd29a5c8 NB	181	switch (array.level) {
	182	case 0:
	183	case 4:
	184	case 5:
e5329c37 NB	185	case 10:
	186	case 6:
	187	printf(" Chunk Size : %dK\n\n", array.chunk_size/1024);
cd29a5c8 NB	188	break;
cd29a5c8 NB	189	case -1:
e5329c37	190	printf(" Rounding : %dK\n\n", array.chunk_size/1024);
cd29a5c8 NB	191	break;
	192	default: break;
	193	}
82b27616	194
e5329c37	195	if (e && e->percent >= 0) {
dd0781e5	196	printf(" Rebuild Status : %d%% complete\n\n", e->percent);
e5329c37 NB	197	is_rebuilding = 1;
e5329c37 NB	198	}
dd0781e5 NB	199	free_mdstat(ms);
dd0781e5 NB	200
e5329c37 NB	201	if (have_super) {
	202	printf(" UUID : ");
	203	if (super.minor_version >= 90)
	204	printf("%08x:%08x:%08x:%08x", super.set_uuid0, super.set_uuid1,
	205	super.set_uuid2, super.set_uuid3);
	206	else
	207	printf("%08x", super.set_uuid0);
	208	printf("\n Events : %d.%d\n\n", super.events_hi, super.events_lo);
	209	}
	210
b83d95f3	211	printf(" Number Major Minor RaidDevice State\n");
cd29a5c8	212	}
e0d19036	213	for (d= 0; d<MD_SB_DISKS; d++) {
64c4757e	214	mdu_disk_info_t disk;
82b27616	215	char *dv;
64c4757e NB	216	disk.number = d;
64c4757e NB	217	if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
e0d19036	218	if (d < array.raid_disks)
b83d95f3	219	fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
e0d19036	220	d, strerror(errno));
64c4757e NB	221	continue;
64c4757e NB	222	}
e0d19036 NB	223	if (d >= array.raid_disks &&
	224	disk.major == 0 &&
	225	disk.minor == 0)
	226	continue;
cd29a5c8	227	if (!brief) {
e5329c37 NB	228	if (disk.number == array.raid_disks) printf("\n");
	229	if (disk.raid_disk < 0)
	230	printf(" %5d %5d %5d - ",
	231	disk.number, disk.major, disk.minor);
	232	else
	233	printf(" %5d %5d %5d %5d ",
	234	disk.number, disk.major, disk.minor, disk.raid_disk);
	235	if (disk.state & (1<<MD_DISK_FAULTY)) {
	236	printf(" faulty");
	237	if (disk.raid_disk < array.raid_disks &&
	238	disk.raid_disk >= 0)
	239	failed++;
	240	}
cd29a5c8 NB	241	if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
	242	if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
	243	if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
e5329c37 NB	244	if (disk.state == 0) printf(" spare");
	245	if (disk.state == 0) {
	246	if (is_26) {
	247	if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
	248	printf(" rebuilding");
	249	} else if (is_rebuilding && failed) {
	250	/* Taking a bit of a risk here, we remove the
	251	* device from the array, and then put it back.
	252	* If this fails, we are rebuilding
	253	*/
0df46c2a NB	254	int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
0df46c2a NB	255	if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
e5329c37 NB	256	if (err && errno == EBUSY)
	257	printf(" rebuilding");
	258	}
	259	}
feb716e9	260	}
e5329c37	261	if (disk.state == 0) spares++;
feb716e9 NB	262	if (test && d < array.raid_disks && disk.state & (1<<MD_DISK_FAULTY)) {
	263	if ((rv & 1) && (array.level ==4 \|\| array.level == 5))
	264	rv \|= 2;
	265	rv \|= 1;
cd29a5c8	266	}
82b27616	267	if ((dv=map_dev(disk.major, disk.minor))) {
d013a55e NB	268	if (brief) {
	269	if (devices) {
	270	devices = realloc(devices,
	271	strlen(devices)+1+strlen(dv)+1);
	272	strcat(strcat(devices,","),dv);
	273	} else
	274	devices = strdup(dv);
	275	} else
	276	printf(" %s", dv);
82b27616	277	}
cd29a5c8	278	if (!brief) printf("\n");
64c4757e	279	}
feb716e9	280	if (spares && brief) printf(" spares=%d", spares);
e5329c37 NB	281	if (have_super && brief) {
e5329c37 NB	282	printf(" UUID=");
82b27616	283	if (super.minor_version >= 90)
cd29a5c8 NB	284	printf("%08x:%08x:%08x:%08x", super.set_uuid0, super.set_uuid1,
	285	super.set_uuid2, super.set_uuid3);
	286	else
	287	printf("%08x", super.set_uuid0);
82b27616	288	}
d013a55e	289	if (brief && devices) printf("\n devices=%s", devices);
cd29a5c8	290	if (brief) printf("\n");
feb716e9	291	if (test && (rv&2)) rv &= ~1;
e5329c37	292	close(fd);
feb716e9	293	return rv;
64c4757e	294	}