[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;

	void *super = NULL;
	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 (!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_super0(fd2, &super, NULL) == 0) {
					struct mdinfo info;
					getinfo_super0(&info, super);
					if (info.array.ctime != array.ctime ||
					    info.array.level != array.level) {
						free(super);
						super = NULL;
					}
				}
				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 (super)
			detail_super0(super);

		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 (super && brief)
		brief_detail_super0(super);

	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
4b1ac34b	54	void *super = NULL;
feb716e9	55	int rv = test ? 4 : 1;
82b27616	56
64c4757e	57	if (fd < 0) {
682c7051	58	fprintf(stderr, Name ": cannot open %s: %s\n",
64c4757e	59	dev, strerror(errno));
feb716e9	60	return rv;
64c4757e NB	61	}
	62	vers = md_get_version(fd);
	63	if (vers < 0) {
682c7051	64	fprintf(stderr, Name ": %s does not appear to be an md device\n",
64c4757e NB	65	dev);
64c4757e NB	66	close(fd);
feb716e9	67	return rv;
64c4757e	68	}
682c7051 NB	69	if (vers < 9000) {
682c7051 NB	70	fprintf(stderr, Name ": cannot get detail for md device %s: driver version too old.\n",
64c4757e NB	71	dev);
64c4757e NB	72	close(fd);
feb716e9	73	return rv;
64c4757e NB	74	}
	75	if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
	76	if (errno == ENODEV)
682c7051	77	fprintf(stderr, Name ": md device %s does not appear to be active.\n",
64c4757e NB	78	dev);
64c4757e NB	79	else
682c7051	80	fprintf(stderr, Name ": cannot get array detail for %s: %s\n",
64c4757e NB	81	dev, strerror(errno));
64c4757e NB	82	close(fd);
feb716e9	83	return rv;
64c4757e	84	}
dd0781e5 NB	85	if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
dd0781e5 NB	86	stb.st_rdev = 0;
feb716e9	87	rv = 0;
e5329c37 NB	88
	89	/* try to load a superblock */
	90	for (d= 0; d<MD_SB_DISKS; d++) {
	91	mdu_disk_info_t disk;
	92	char *dv;
	93	disk.number = d;
	94	if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
	95	continue;
	96	if (d >= array.raid_disks &&
	97	disk.major == 0 &&
	98	disk.minor == 0)
	99	continue;
	100	if ((dv=map_dev(disk.major, disk.minor))) {
4b1ac34b	101	if (!super && (disk.state & (1<<MD_DISK_ACTIVE))) {
e5329c37 NB	102	/* try to read the superblock from this device
	103	* to get more info
	104	*/
	105	int fd2 = open(dv, O_RDONLY);
	106	if (fd2 >=0 &&
4b1ac34b NB	107	load_super0(fd2, &super, NULL) == 0) {
	108	struct mdinfo info;
	109	getinfo_super0(&info, super);
	110	if (info.array.ctime != array.ctime \|\|
	111	info.array.level != array.level) {
	112	free(super);
	113	super = NULL;
	114	}
	115	}
e5329c37 NB	116	if (fd2 >= 0) close(fd2);
	117	}
	118	}
	119	}
	120
64c4757e	121	/* Ok, we have some info to print... */
682c7051	122	c = map_num(pers, array.level);
cd29a5c8	123	if (brief)
b83d95f3	124	printf("ARRAY %s level=%s num-devices=%d", dev, c?c:"-unknown-",array.raid_disks );
cd29a5c8	125	else {
e0d19036 NB	126	unsigned long array_size;
e0d19036 NB	127	unsigned long long larray_size;
dd0781e5 NB	128	struct mdstat_ent *ms = mdstat_read(0);
	129	struct mdstat_ent *e;
	130	int devnum = array.md_minor;
0df46c2a	131	if (major(stb.st_rdev) != MD_MAJOR)
dd0781e5 NB	132	devnum = -1 - devnum;
	133
	134	for (e=ms; e; e=e->next)
	135	if (e->devnum == devnum)
	136	break;
11a3e71d	137	#ifdef BLKGETSIZE64
56eb10c0 NB	138	if (ioctl(fd, BLKGETSIZE64, &larray_size)==0)
56eb10c0 NB	139	;
11a3e71d NB	140	else
11a3e71d NB	141	#endif
b83d95f3 NB	142	if (ioctl(fd, BLKGETSIZE, &array_size)==0) {
	143	larray_size = array_size;
	144	larray_size <<= 9;
	145	}
	146
56eb10c0 NB	147	else larray_size = 0;
56eb10c0 NB	148
cd29a5c8 NB	149	printf("%s:\n", dev);
	150	printf(" Version : %02d.%02d.%02d\n",
	151	array.major_version, array.minor_version, array.patch_version);
	152	atime = array.ctime;
	153	printf(" Creation Time : %.24s\n", ctime(&atime));
	154	printf(" Raid Level : %s\n", c?c:"-unknown-");
56eb10c0	155	if (larray_size)
dd0781e5	156	printf(" Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
cd29a5c8	157	if (array.level >= 1)
56eb10c0	158	printf(" Device Size : %d%s\n", array.size, human_size((long long)array.size<<10));
b83d95f3 NB	159	printf(" Raid Devices : %d\n", array.raid_disks);
b83d95f3 NB	160	printf(" Total Devices : %d\n", array.nr_disks);
cd29a5c8	161	printf("Preferred Minor : %d\n", array.md_minor);
b83d95f3	162	printf(" Persistence : Superblock is %spersistent\n",
cd29a5c8 NB	163	array.not_persistent?"not ":"");
	164	printf("\n");
	165	atime = array.utime;
	166	printf(" Update Time : %.24s\n", ctime(&atime));
dd0781e5	167	printf(" State : %s%s%s\n",
182661f4	168	(array.state&(1<<MD_SB_CLEAN))?"clean":"active",
dd0781e5	169	array.active_disks < array.raid_disks? ", degraded":"",
e5329c37 NB	170	(!e \|\| e->percent < 0) ? "" :
e5329c37 NB	171	(e->resync) ? ", resyncing": ", recovering");
b83d95f3 NB	172	printf(" Active Devices : %d\n", array.active_disks);
	173	printf("Working Devices : %d\n", array.working_disks);
	174	printf(" Failed Devices : %d\n", array.failed_disks);
	175	printf(" Spare Devices : %d\n", array.spare_disks);
cd29a5c8 NB	176	printf("\n");
	177	if (array.level == 5) {
	178	c = map_num(r5layout, array.layout);
	179	printf(" Layout : %s\n", c?c:"-unknown-");
	180	}
e5329c37 NB	181	if (array.level == 10) {
	182	printf(" Layout : near=%d, far=%d\n",
	183	array.layout&255, (array.layout>>8)&255);
	184	}
cd29a5c8 NB	185	switch (array.level) {
	186	case 0:
	187	case 4:
	188	case 5:
e5329c37 NB	189	case 10:
	190	case 6:
	191	printf(" Chunk Size : %dK\n\n", array.chunk_size/1024);
cd29a5c8 NB	192	break;
cd29a5c8 NB	193	case -1:
e5329c37	194	printf(" Rounding : %dK\n\n", array.chunk_size/1024);
cd29a5c8 NB	195	break;
	196	default: break;
	197	}
82b27616	198
e5329c37	199	if (e && e->percent >= 0) {
dd0781e5	200	printf(" Rebuild Status : %d%% complete\n\n", e->percent);
e5329c37 NB	201	is_rebuilding = 1;
e5329c37 NB	202	}
dd0781e5 NB	203	free_mdstat(ms);
dd0781e5 NB	204
4b1ac34b NB	205	if (super)
4b1ac34b NB	206	detail_super0(super);
e5329c37	207
b83d95f3	208	printf(" Number Major Minor RaidDevice State\n");
cd29a5c8	209	}
e0d19036	210	for (d= 0; d<MD_SB_DISKS; d++) {
64c4757e	211	mdu_disk_info_t disk;
82b27616	212	char *dv;
64c4757e NB	213	disk.number = d;
64c4757e NB	214	if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
e0d19036	215	if (d < array.raid_disks)
b83d95f3	216	fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
e0d19036	217	d, strerror(errno));
64c4757e NB	218	continue;
64c4757e NB	219	}
e0d19036 NB	220	if (d >= array.raid_disks &&
	221	disk.major == 0 &&
	222	disk.minor == 0)
	223	continue;
cd29a5c8	224	if (!brief) {
e5329c37 NB	225	if (disk.number == array.raid_disks) printf("\n");
	226	if (disk.raid_disk < 0)
	227	printf(" %5d %5d %5d - ",
	228	disk.number, disk.major, disk.minor);
	229	else
	230	printf(" %5d %5d %5d %5d ",
	231	disk.number, disk.major, disk.minor, disk.raid_disk);
	232	if (disk.state & (1<<MD_DISK_FAULTY)) {
	233	printf(" faulty");
	234	if (disk.raid_disk < array.raid_disks &&
	235	disk.raid_disk >= 0)
	236	failed++;
	237	}
cd29a5c8 NB	238	if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
	239	if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
	240	if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
e5329c37 NB	241	if (disk.state == 0) printf(" spare");
	242	if (disk.state == 0) {
	243	if (is_26) {
	244	if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
	245	printf(" rebuilding");
	246	} else if (is_rebuilding && failed) {
	247	/* Taking a bit of a risk here, we remove the
	248	* device from the array, and then put it back.
	249	* If this fails, we are rebuilding
	250	*/
0df46c2a NB	251	int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
0df46c2a NB	252	if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
e5329c37 NB	253	if (err && errno == EBUSY)
	254	printf(" rebuilding");
	255	}
	256	}
feb716e9	257	}
e5329c37	258	if (disk.state == 0) spares++;
feb716e9 NB	259	if (test && d < array.raid_disks && disk.state & (1<<MD_DISK_FAULTY)) {
	260	if ((rv & 1) && (array.level ==4 \|\| array.level == 5))
	261	rv \|= 2;
	262	rv \|= 1;
cd29a5c8	263	}
82b27616	264	if ((dv=map_dev(disk.major, disk.minor))) {
d013a55e NB	265	if (brief) {
	266	if (devices) {
	267	devices = realloc(devices,
	268	strlen(devices)+1+strlen(dv)+1);
	269	strcat(strcat(devices,","),dv);
	270	} else
	271	devices = strdup(dv);
	272	} else
	273	printf(" %s", dv);
82b27616	274	}
cd29a5c8	275	if (!brief) printf("\n");
64c4757e	276	}
feb716e9	277	if (spares && brief) printf(" spares=%d", spares);
4b1ac34b NB	278	if (super && brief)
	279	brief_detail_super0(super);
	280
d013a55e	281	if (brief && devices) printf("\n devices=%s", devices);
cd29a5c8	282	if (brief) printf("\n");
feb716e9	283	if (test && (rv&2)) rv &= ~1;
e5329c37	284	close(fd);
feb716e9	285	return rv;
64c4757e	286	}