[thirdparty/mdadm.git] / super0.c

/*
 * mdadm - manage Linux "md" devices aka RAID arrays.
 *
 * Copyright (C) 2001-2004 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"

/*
 * All handling for the 0.90.0 version superblock is in
 * this file.
 * This includes:
 *   - finding, loading, and writing the superblock.
 *   - initialising a new superblock
 *   - printing the superblock for --examine
 *   - printing part of the superblock for --detail
 * .. other stuff 
 */


static unsigned long calc_sb0_csum(mdp_super_t *super)
{
	unsigned long csum = super->sb_csum;
	unsigned long newcsum;
	super->sb_csum= 0 ;
	newcsum = calc_csum(super, MD_SB_BYTES);
	super->sb_csum = csum;
	return newcsum;
}

static void examine_super0(void *sbv)
{
	mdp_super_t *sb = sbv;
	time_t atime;
	int d;
	char *c;

	printf("          Magic : %08x\n", sb->md_magic);
	printf("        Version : %02d.%02d.%02d\n", sb->major_version, sb->minor_version,
	       sb->patch_version);
	if (sb->minor_version >= 90)
		printf("           UUID : %08x:%08x:%08x:%08x\n", sb->set_uuid0, sb->set_uuid1,
		       sb->set_uuid2, sb->set_uuid3);
	else
		printf("           UUID : %08x\n", sb->set_uuid0);

	atime = sb->ctime;
	printf("  Creation Time : %.24s\n", ctime(&atime));
	c=map_num(pers, sb->level);
	printf("     Raid Level : %s\n", c?c:"-unknown-");
	if ((int)sb->level >= 0)
		printf("    Device Size : %d%s\n", sb->size, human_size((long long)sb->size<<10));
	printf("   Raid Devices : %d\n", sb->raid_disks);
	printf("  Total Devices : %d\n", sb->nr_disks);
	printf("Preferred Minor : %d\n", sb->md_minor);
	printf("\n");
	atime = sb->utime;
	printf("    Update Time : %.24s\n", ctime(&atime));
	printf("          State : %s\n",
	       (sb->state&(1<<MD_SB_CLEAN))?"clean":"active");
	printf(" Active Devices : %d\n", sb->active_disks);
	printf("Working Devices : %d\n", sb->working_disks);
	printf(" Failed Devices : %d\n", sb->failed_disks);
	printf("  Spare Devices : %d\n", sb->spare_disks);
	if (calc_sb0_csum(sb) == sb->sb_csum)
		printf("       Checksum : %x - correct\n", sb->sb_csum);
	else
		printf("       Checksum : %x - expected %lx\n", sb->sb_csum, calc_sb0_csum(sb));
	printf("         Events : %d.%d\n", sb->events_hi, sb->events_lo);
	printf("\n");
	if (sb->level == 5) {
		c = map_num(r5layout, sb->layout);
		printf("         Layout : %s\n", c?c:"-unknown-");
	}
	switch(sb->level) {
	case 0:
	case 4:
	case 5:
		printf("     Chunk Size : %dK\n", sb->chunk_size/1024);
		break;
	case -1:
		printf("       Rounding : %dK\n", sb->chunk_size/1024);
		break;
	default: break;		
	}
	printf("\n");
	printf("      Number   Major   Minor   RaidDevice State\n");
	for (d= -1; d<(signed int)(sb->raid_disks+sb->spare_disks); d++) {
		mdp_disk_t *dp;
		char *dv;
		char nb[5];
		if (d>=0) dp = &sb->disks[d];
		else dp = &sb->this_disk;
		sprintf(nb, "%4d", d);
		printf("%4s %5d   %5d    %5d    %5d     ", d < 0 ? "this" :  nb,
		       dp->number, dp->major, dp->minor, dp->raid_disk);
		if (dp->state & (1<<MD_DISK_FAULTY)) printf(" faulty");
		if (dp->state & (1<<MD_DISK_ACTIVE)) printf(" active");
		if (dp->state & (1<<MD_DISK_SYNC)) printf(" sync");
		if (dp->state & (1<<MD_DISK_REMOVED)) printf(" removed");
		if (dp->state == 0) printf(" spare");
		if ((dv=map_dev(dp->major, dp->minor)))
			printf("   %s", dv);
		printf("\n");
		if (d == -1) printf("\n");
	}
}

static void brief_examine_super0(void *sbv)
{
	mdp_super_t *sb = sbv;
	char *c=map_num(pers, sb->level);

	printf("ARRAY %s level=%s num-devices=%d UUID=",
	       get_md_name(sb->md_minor),
	       c?c:"-unknown-", sb->raid_disks);
	if (sb->minor_version >= 90)
		printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1,
		       sb->set_uuid2, sb->set_uuid3);
	else
		printf("%08x", sb->set_uuid0);
	printf("\n");
}

static void detail_super0(void *sbv)
{
	mdp_super_t *sb = sbv;
	printf("           UUID : ");
	if (sb->minor_version >= 90)
		printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1,
		       sb->set_uuid2, sb->set_uuid3);
	else
		printf("%08x", sb->set_uuid0);
	printf("\n         Events : %d.%d\n\n", sb->events_hi, sb->events_lo);
}

static void brief_detail_super0(void *sbv)
{
	mdp_super_t *sb = sbv;
	printf(" UUID=");
	if (sb->minor_version >= 90)
		printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1,
		       sb->set_uuid2, sb->set_uuid3);
	else
		printf("%08x", sb->set_uuid0);
}

static void uuid_from_super0(int uuid[4], void * sbv)
{
	mdp_super_t *super = sbv;
	uuid[0] = super->set_uuid0;
	if (super->minor_version >= 90) {
		uuid[1] = super->set_uuid1;
		uuid[2] = super->set_uuid2;
		uuid[3] = super->set_uuid3;
	} else {
		uuid[1] = 0;
		uuid[2] = 0;
		uuid[3] = 0;
	}
}

static void getinfo_super0(struct mdinfo *info, void *sbv)
{
	mdp_super_t *sb = sbv;
	int working = 0;
	int i;

	info->array.major_version = sb->major_version;
	info->array.minor_version = sb->minor_version;
	info->array.patch_version = sb->patch_version;
	info->array.raid_disks = sb->raid_disks;
	info->array.level = sb->level;
	info->array.md_minor = sb->md_minor;
	info->array.ctime = sb->ctime;

	info->disk.state = sb->this_disk.state;
	info->disk.major = sb->this_disk.major;
	info->disk.minor = sb->this_disk.minor;
	info->disk.raid_disk = sb->this_disk.raid_disk;

	info->events = md_event(sb);

	uuid_from_super0(info->uuid, sbv);
	
	/* work_disks is calculated rather than read directly */
	for (i=0; i < MD_SB_DISKS; i++)
		if ((sb->disks[i].state & (1<<MD_DISK_SYNC)) &&
		    (sb->disks[i].state & (1<<MD_DISK_ACTIVE)) &&
		    !(sb->disks[i].state & (1<<MD_DISK_FAULTY)))
			working ++;
	info->array.working_disks = working;
}


static int update_super0(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose)
{
	int rv = 0;
	mdp_super_t *sb = sbv;
	if (strcmp(update, "sparc2.2")==0 ) {
		/* 2.2 sparc put the events in the wrong place
		 * So we copy the tail of the superblock
		 * up 4 bytes before continuing
		 */
		__u32 *sb32 = (__u32*)sb;
		memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7,
		       sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1,
		       (MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4);
		fprintf (stderr, Name ": adjusting superblock of %s for 2.2/sparc compatability.\n",
			 devname);
	}
	if (strcmp(update, "super-minor") ==0) {
		sb->md_minor = info->array.md_minor;
		if (verbose)
			fprintf(stderr, Name ": updating superblock of %s with minor number %d\n",
				devname, info->array.md_minor);
	}
	if (strcmp(update, "summaries") == 0) {
		int i;
		/* set nr_disks, active_disks, working_disks,
		 * failed_disks, spare_disks based on disks[] 
		 * array in superblock.
		 * Also make sure extra slots aren't 'failed'
		 */
		sb->nr_disks = sb->active_disks =
			sb->working_disks = sb->failed_disks =
			sb->spare_disks = 0;
		for (i=0; i < MD_SB_DISKS ; i++) 
			if (sb->disks[i].major ||
			    sb->disks[i].minor) {
				int state = sb->disks[i].state;
				if (state & (1<<MD_DISK_REMOVED))
					continue;
				sb->nr_disks++;
				if (state & (1<<MD_DISK_ACTIVE))
					sb->active_disks++;
				if (state & (1<<MD_DISK_FAULTY))
					sb->failed_disks++;
				else
					sb->working_disks++;
				if (state == 0)
					sb->spare_disks++;
			} else if (i >= sb->raid_disks && sb->disks[i].number == 0)
				sb->disks[i].state = 0;
	}
	if (strcmp(update, "force")==0) {
		sb->events_hi = (info->events>>32) & 0xFFFFFFFF;
		sb->events_lo = (info->events) & 0xFFFFFFFF;
		if (sb->level == 5 || sb->level == 4 || sb->level == 6)
			/* need to force clean */
			sb->state |= (1 << MD_SB_CLEAN);
	}
	if (strcmp(update, "assemble")==0) {
		int d = info->disk.number;
		if (sb->disks[d].state != info->disk.state) {
			sb->disks[d].state = info->disk.state;
			rv = 1;
		}
	}
	if (strcmp(update, "newdev") == 0) {
		int d = info->disk.number;
		memset(&sb->disks[d], 0, sizeof(sb->disks[d]));
		sb->disks[d].number = d;
		sb->disks[d].major = info->disk.major;
		sb->disks[d].minor = info->disk.minor;
		sb->disks[d].raid_disk = info->disk.raid_disk;
		sb->disks[d].state = info->disk.state;
		sb->this_disk = sb->disks[d];
	}
	if (strcmp(update, "grow") == 0) {
		sb->raid_disks = info->array.raid_disks;
		sb->nr_disks = info->array.nr_disks;
		sb->active_disks = info->array.active_disks;
		sb->working_disks = info->array.working_disks;
		memset(&sb->disks[info->disk.number], 0, sizeof(sb->disks[0]));
		sb->disks[info->disk.number].number = info->disk.number;
		sb->disks[info->disk.number].major = info->disk.major;
		sb->disks[info->disk.number].minor = info->disk.minor;
		sb->disks[info->disk.number].raid_disk = info->disk.raid_disk;
		sb->disks[info->disk.number].state = info->disk.state;
		if (sb->this_disk.number == info->disk.number)
			sb->this_disk = sb->disks[info->disk.number];
	}
	if (strcmp(update, "resync") == 0) {
		/* make sure resync happens */
		sb->state &= ~(1<<MD_SB_CLEAN);
		sb->recovery_cp = 0;
	}

	sb->sb_csum = calc_sb0_csum(sb);
	return rv;
}

static __u64 event_super0(void *sbv)
{
	mdp_super_t *sb = sbv;
	return md_event(sb);
}


static int init_super0(void **sbp, mdu_array_info_t *info)
{
	mdp_super_t *sb = malloc(MD_SB_BYTES);
	int spares;
	memset(sb, 0, MD_SB_BYTES);

	if (info->major_version == -1) {
		/* zeroing the superblock */
		return 0;
	}

	spares = info->working_disks - info->active_disks;
	if (info->raid_disks + spares  > MD_SB_DISKS) {
		fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n",
			info->raid_disks , spares, MD_SB_DISKS);
		return 0;
	}

	sb->md_magic = MD_SB_MAGIC;
	sb->major_version = 0;
	sb->minor_version = 90;
	sb->patch_version = 0;
	sb->gvalid_words = 0; /* ignored */
	sb->set_uuid0 = random();
	sb->ctime = time(0);
	sb->level = info->level;
	sb->size = info->size;
	sb->nr_disks = info->nr_disks;
	sb->raid_disks = info->raid_disks;
	sb->md_minor = info->md_minor;
	sb->not_persistent = 0;
	sb->set_uuid1 = random();
	sb->set_uuid2 = random();
	sb->set_uuid3 = random();

	sb->utime = sb->ctime;
	sb->state = info->state;
	sb->active_disks = info->active_disks;
	sb->working_disks = info->working_disks;
	sb->failed_disks = info->failed_disks;
	sb->events_hi = 0;
	sb->events_lo = 1;

	sb->layout = info->layout;
	sb->chunk_size = info->chunk_size;

	*sbp = sb;
	return 1;
}

/* Add a device to the superblock being created */
static void add_to_super0(void *sbv, mdu_disk_info_t *dinfo)
{
	mdp_super_t *sb = sbv;
	mdp_disk_t *dk = &sb->disks[dinfo->number];
	
	dk->number = dinfo->number;
	dk->major = dinfo->major;
	dk->minor = dinfo->minor;
	dk->raid_disk = dinfo->raid_disk;
	dk->state = dinfo->state;
}

static int store_super0(int fd, void *sbv)
{
	unsigned long size;
	unsigned long long dsize;
	unsigned long long offset;
	mdp_super_t *super = sbv;
    
#ifdef BLKGETSIZE64
	if (ioctl(fd, BLKGETSIZE64, &dsize) != 0)
#endif
	{
		if (ioctl(fd, BLKGETSIZE, &size))
			return 1;
		else
			dsize = ((unsigned long long)size)<<9;
	}

	if (dsize < MD_RESERVED_SECTORS*2)
		return 2;
	
	offset = MD_NEW_SIZE_SECTORS(dsize>>9);

	offset *= 512;

	if (lseek64(fd, offset, 0)< 0LL)
		return 3;

	if (write(fd, super, sizeof(*super)) != sizeof(*super))
		return 4;

	return 0;
}

static int write_init_super0(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname)
{
	mdp_super_t *sb = sbv;
	int fd = open(devname, O_RDWR, O_EXCL);
	int rv;

	if (fd < 0) {
		fprintf(stderr, Name ": Failed to open %s to write superblock\n", devname);
		return -1;
	}

	sb->this_disk = sb->disks[dinfo->number];
	sb->sb_csum = calc_sb0_csum(sb);
	rv = store_super0(fd, sb);
	close(fd);
	if (rv)
		fprintf(stderr, Name ": failed to write superblock to %s\n", devname);
	return rv;
}

static int compare_super0(void **firstp, void *secondv)
{
	/*
	 * return:
	 *  0 same, or first was empty, and second was copied
	 *  1 second had wrong number
	 *  2 wrong uuid
	 *  3 wrong other info
	 */
	mdp_super_t *first = *firstp;
	mdp_super_t *second = secondv;

	int uuid1[4], uuid2[4];
	if (second->md_magic != MD_SB_MAGIC)
		return 1;
	if (!first) {
		first = malloc(MD_SB_BYTES);
		memcpy(first, second, MD_SB_BYTES);
		*firstp = first;
		return 0;
	}

	uuid_from_super0(uuid1, first);
	uuid_from_super0(uuid2, second);
	if (!same_uuid(uuid1, uuid2))
		return 2;
	if (first->major_version != second->major_version ||
	    first->minor_version != second->minor_version ||
	    first->patch_version != second->patch_version ||
	    first->gvalid_words  != second->gvalid_words  ||
	    first->ctime         != second->ctime         ||
	    first->level         != second->level         ||
	    first->size          != second->size          ||
	    first->raid_disks    != second->raid_disks    )
		return 3;

	return 0;
}


static int load_super0(struct supertype *st, int fd, void **sbp, char *devname)
{
	/* try to read in the superblock
	 * Return:
	 *  0 on success
	 *  1 on cannot get superblock
	 *  2 on superblock meaningless
	 */
	unsigned long size;
	unsigned long long dsize;
	unsigned long long offset;
	mdp_super_t *super;
    
#ifdef BLKGETSIZE64
	if (ioctl(fd, BLKGETSIZE64, &dsize) != 0)
#endif
	{
		if (ioctl(fd, BLKGETSIZE, &size)) {
			if (devname)
				fprintf(stderr, Name ": cannot find device size for %s: %s\n",
					devname, strerror(errno));
			return 1;
		} else
			dsize = size << 9;
	}

	if (dsize < MD_RESERVED_SECTORS*2) {
		if (devname)
			fprintf(stderr, Name ": %s is too small for md: size is %ld sectors.\n",
				devname, size);
		return 1;
	}
	
	offset = MD_NEW_SIZE_SECTORS(dsize>>9);

	offset *= 512;

	ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */

	if (lseek64(fd, offset, 0)< 0LL) {
		if (devname)
			fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n",
				devname, strerror(errno));
		return 1;
	}

	super = malloc(MD_SB_BYTES);

	if (read(fd, super, sizeof(*super)) != MD_SB_BYTES) {
		if (devname)
			fprintf(stderr, Name ": Cannot read superblock on %s\n",
				devname);
		free(super);
		return 1;
	}

	if (super->md_magic != MD_SB_MAGIC) {
		if (devname)
			fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n",
				devname, MD_SB_MAGIC, super->md_magic);
		free(super);
		return 2;
	}

	if (super->major_version != 0) {
		if (devname)
			fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n",
				devname, super->major_version);
		free(super);
		return 2;
	}
	*sbp = super;
	if (st->ss == NULL) {
		st->ss = &super0;
		st->minor_version = 90;
	}

	return 0;
}

static struct supertype *match_metadata_desc0(char *arg)
{
	struct supertype *st = malloc(sizeof(*st));
	if (!st) return st;

	st->ss = &super0;
	st->minor_version = 90;
	if (strcmp(arg, "0") == 0 ||
	    strcmp(arg, "0.90") == 0 ||
	    strcmp(arg, "default") == 0
		)
		return st;

	free(st);
	return NULL;
}

static __u64 avail_size0(__u64 devsize)
{
	if (devsize < MD_RESERVED_SECTORS*2)
		return 0ULL;
	return MD_NEW_SIZE_SECTORS(devsize);
}

struct superswitch super0 = {
	.examine_super = examine_super0,
	.brief_examine_super = brief_examine_super0,
	.detail_super = detail_super0,
	.brief_detail_super = brief_detail_super0,
	.uuid_from_super = uuid_from_super0,
	.getinfo_super = getinfo_super0,
	.update_super = update_super0,
	.event_super = event_super0,
	.init_super = init_super0,
	.add_to_super = add_to_super0,
	.store_super = store_super0,
	.write_init_super = write_init_super0,
	.compare_super = compare_super0,
	.load_super = load_super0,
	.match_metadata_desc = match_metadata_desc0,
	.avail_size = avail_size0,
	.major = 0,
};
Commit	Line	Data
4b1ac34b NB	1	/*
	2	* mdadm - manage Linux "md" devices aka RAID arrays.
	3	*
	4	* Copyright (C) 2001-2004 Neil Brown <neilb@cse.unsw.edu.au>
	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
	30	#include "mdadm.h"
	31
	32	/*
	33	* All handling for the 0.90.0 version superblock is in
	34	* this file.
	35	* This includes:
	36	* - finding, loading, and writing the superblock.
	37	* - initialising a new superblock
	38	* - printing the superblock for --examine
	39	* - printing part of the superblock for --detail
	40	* .. other stuff
	41	*/
	42
	43
	44	static unsigned long calc_sb0_csum(mdp_super_t *super)
	45	{
	46	unsigned long csum = super->sb_csum;
	47	unsigned long newcsum;
	48	super->sb_csum= 0 ;
	49	newcsum = calc_csum(super, MD_SB_BYTES);
	50	super->sb_csum = csum;
	51	return newcsum;
	52	}
	53
f9ce90ba	54	static void examine_super0(void *sbv)
4b1ac34b NB	55	{
	56	mdp_super_t *sb = sbv;
	57	time_t atime;
	58	int d;
	59	char *c;
	60
	61	printf(" Magic : %08x\n", sb->md_magic);
	62	printf(" Version : %02d.%02d.%02d\n", sb->major_version, sb->minor_version,
	63	sb->patch_version);
	64	if (sb->minor_version >= 90)
	65	printf(" UUID : %08x:%08x:%08x:%08x\n", sb->set_uuid0, sb->set_uuid1,
	66	sb->set_uuid2, sb->set_uuid3);
	67	else
	68	printf(" UUID : %08x\n", sb->set_uuid0);
	69
	70	atime = sb->ctime;
	71	printf(" Creation Time : %.24s\n", ctime(&atime));
	72	c=map_num(pers, sb->level);
	73	printf(" Raid Level : %s\n", c?c:"-unknown-");
	74	if ((int)sb->level >= 0)
	75	printf(" Device Size : %d%s\n", sb->size, human_size((long long)sb->size<<10));
	76	printf(" Raid Devices : %d\n", sb->raid_disks);
	77	printf(" Total Devices : %d\n", sb->nr_disks);
	78	printf("Preferred Minor : %d\n", sb->md_minor);
	79	printf("\n");
	80	atime = sb->utime;
	81	printf(" Update Time : %.24s\n", ctime(&atime));
	82	printf(" State : %s\n",
	83	(sb->state&(1<<MD_SB_CLEAN))?"clean":"active");
	84	printf(" Active Devices : %d\n", sb->active_disks);
	85	printf("Working Devices : %d\n", sb->working_disks);
	86	printf(" Failed Devices : %d\n", sb->failed_disks);
	87	printf(" Spare Devices : %d\n", sb->spare_disks);
	88	if (calc_sb0_csum(sb) == sb->sb_csum)
	89	printf(" Checksum : %x - correct\n", sb->sb_csum);
	90	else
	91	printf(" Checksum : %x - expected %lx\n", sb->sb_csum, calc_sb0_csum(sb));
	92	printf(" Events : %d.%d\n", sb->events_hi, sb->events_lo);
	93	printf("\n");
	94	if (sb->level == 5) {
	95	c = map_num(r5layout, sb->layout);
	96	printf(" Layout : %s\n", c?c:"-unknown-");
	97	}
	98	switch(sb->level) {
	99	case 0:
	100	case 4:
	101	case 5:
	102	printf(" Chunk Size : %dK\n", sb->chunk_size/1024);
	103	break;
	104	case -1:
	105	printf(" Rounding : %dK\n", sb->chunk_size/1024);
	106	break;
	107	default: break;
	108	}
	109	printf("\n");
	110	printf(" Number Major Minor RaidDevice State\n");
	111	for (d= -1; d<(signed int)(sb->raid_disks+sb->spare_disks); d++) {
	112	mdp_disk_t *dp;
	113	char *dv;
	114	char nb[5];
	115	if (d>=0) dp = &sb->disks[d];
	116	else dp = &sb->this_disk;
	117	sprintf(nb, "%4d", d);
	118	printf("%4s %5d %5d %5d %5d ", d < 0 ? "this" : nb,
119	dp->number, dp->major, dp->minor, dp->raid_disk);
120	if (dp->state & (1<<MD_DISK_FAULTY)) printf(" faulty");
121	if (dp->state & (1<<MD_DISK_ACTIVE)) printf(" active");
122	if (dp->state & (1<<MD_DISK_SYNC)) printf(" sync");
123	if (dp->state & (1<<MD_DISK_REMOVED)) printf(" removed");
124	if (dp->state == 0) printf(" spare");
125	if ((dv=map_dev(dp->major, dp->minor)))
126	printf(" %s", dv);
127	printf("\n");
128	if (d == -1) printf("\n");
129	}
130	}
131
f9ce90ba	132	static void brief_examine_super0(void *sbv)
4b1ac34b NB	133	{
	134	mdp_super_t *sb = sbv;
	135	char *c=map_num(pers, sb->level);
	136
	137	printf("ARRAY %s level=%s num-devices=%d UUID=",
	138	get_md_name(sb->md_minor),
	139	c?c:"-unknown-", sb->raid_disks);
	140	if (sb->minor_version >= 90)
	141	printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1,
	142	sb->set_uuid2, sb->set_uuid3);
	143	else
	144	printf("%08x", sb->set_uuid0);
	145	printf("\n");
	146	}
	147
f9ce90ba	148	static void detail_super0(void *sbv)
4b1ac34b NB	149	{
	150	mdp_super_t *sb = sbv;
	151	printf(" UUID : ");
	152	if (sb->minor_version >= 90)
	153	printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1,
	154	sb->set_uuid2, sb->set_uuid3);
	155	else
	156	printf("%08x", sb->set_uuid0);
	157	printf("\n Events : %d.%d\n\n", sb->events_hi, sb->events_lo);
	158	}
	159
f9ce90ba	160	static void brief_detail_super0(void *sbv)
4b1ac34b NB	161	{
	162	mdp_super_t *sb = sbv;
	163	printf(" UUID=");
	164	if (sb->minor_version >= 90)
	165	printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1,
	166	sb->set_uuid2, sb->set_uuid3);
	167	else
	168	printf("%08x", sb->set_uuid0);
	169	}
	170
f9ce90ba	171	static void uuid_from_super0(int uuid[4], void * sbv)
4b1ac34b NB	172	{
	173	mdp_super_t *super = sbv;
	174	uuid[0] = super->set_uuid0;
	175	if (super->minor_version >= 90) {
	176	uuid[1] = super->set_uuid1;
	177	uuid[2] = super->set_uuid2;
	178	uuid[3] = super->set_uuid3;
	179	} else {
	180	uuid[1] = 0;
	181	uuid[2] = 0;
	182	uuid[3] = 0;
	183	}
	184	}
	185
f9ce90ba	186	static void getinfo_super0(struct mdinfo info, void sbv)
4b1ac34b NB	187	{
	188	mdp_super_t *sb = sbv;
	189	int working = 0;
	190	int i;
	191
	192	info->array.major_version = sb->major_version;
	193	info->array.minor_version = sb->minor_version;
	194	info->array.patch_version = sb->patch_version;
	195	info->array.raid_disks = sb->raid_disks;
	196	info->array.level = sb->level;
	197	info->array.md_minor = sb->md_minor;
	198	info->array.ctime = sb->ctime;
	199
	200	info->disk.state = sb->this_disk.state;
	201	info->disk.major = sb->this_disk.major;
	202	info->disk.minor = sb->this_disk.minor;
	203	info->disk.raid_disk = sb->this_disk.raid_disk;
	204
	205	info->events = md_event(sb);
	206
	207	uuid_from_super0(info->uuid, sbv);
	208
	209	/* work_disks is calculated rather than read directly */
	210	for (i=0; i < MD_SB_DISKS; i++)
	211	if ((sb->disks[i].state & (1<<MD_DISK_SYNC)) &&
	212	(sb->disks[i].state & (1<<MD_DISK_ACTIVE)) &&
	213	!(sb->disks[i].state & (1<<MD_DISK_FAULTY)))
	214	working ++;
	215	info->array.working_disks = working;
	216	}
	217
	218
f9ce90ba	219	static int update_super0(struct mdinfo info, void sbv, char update, char devname, int verbose)
4b1ac34b NB	220	{
	221	int rv = 0;
	222	mdp_super_t *sb = sbv;
	223	if (strcmp(update, "sparc2.2")==0 ) {
	224	/* 2.2 sparc put the events in the wrong place
	225	* So we copy the tail of the superblock
	226	* up 4 bytes before continuing
	227	*/
	228	__u32 sb32 = (__u32)sb;
	229	memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7,
	230	sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1,
	231	(MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4);
	232	fprintf (stderr, Name ": adjusting superblock of %s for 2.2/sparc compatability.\n",
	233	devname);
	234	}
	235	if (strcmp(update, "super-minor") ==0) {
	236	sb->md_minor = info->array.md_minor;
	237	if (verbose)
	238	fprintf(stderr, Name ": updating superblock of %s with minor number %d\n",
	239	devname, info->array.md_minor);
	240	}
	241	if (strcmp(update, "summaries") == 0) {
	242	int i;
	243	/* set nr_disks, active_disks, working_disks,
	244	* failed_disks, spare_disks based on disks[]
	245	* array in superblock.
	246	* Also make sure extra slots aren't 'failed'
	247	*/
	248	sb->nr_disks = sb->active_disks =
	249	sb->working_disks = sb->failed_disks =
	250	sb->spare_disks = 0;
	251	for (i=0; i < MD_SB_DISKS ; i++)
	252	if (sb->disks[i].major \|\|
	253	sb->disks[i].minor) {
	254	int state = sb->disks[i].state;
	255	if (state & (1<<MD_DISK_REMOVED))
	256	continue;
	257	sb->nr_disks++;
	258	if (state & (1<<MD_DISK_ACTIVE))
	259	sb->active_disks++;
	260	if (state & (1<<MD_DISK_FAULTY))
	261	sb->failed_disks++;
	262	else
	263	sb->working_disks++;
	264	if (state == 0)
	265	sb->spare_disks++;
	266	} else if (i >= sb->raid_disks && sb->disks[i].number == 0)
	267	sb->disks[i].state = 0;
	268	}
	269	if (strcmp(update, "force")==0) {
	270	sb->events_hi = (info->events>>32) & 0xFFFFFFFF;
	271	sb->events_lo = (info->events) & 0xFFFFFFFF;
	272	if (sb->level == 5 \|\| sb->level == 4 \|\| sb->level == 6)
	273	/* need to force clean */
	274	sb->state \|= (1 << MD_SB_CLEAN);
	275	}
	276	if (strcmp(update, "assemble")==0) {
	277	int d = info->disk.number;
	278	if (sb->disks[d].state != info->disk.state) {
	279	sb->disks[d].state = info->disk.state;
	280	rv = 1;
	281	}
	282	}
	283	if (strcmp(update, "newdev") == 0) {
284	int d = info->disk.number;
285	memset(&sb->disks[d], 0, sizeof(sb->disks[d]));
286	sb->disks[d].number = d;
287	sb->disks[d].major = info->disk.major;
288	sb->disks[d].minor = info->disk.minor;
289	sb->disks[d].raid_disk = info->disk.raid_disk;
290	sb->disks[d].state = info->disk.state;
291	sb->this_disk = sb->disks[d];
292	}
293	if (strcmp(update, "grow") == 0) {
294	sb->raid_disks = info->array.raid_disks;
295	sb->nr_disks = info->array.nr_disks;
296	sb->active_disks = info->array.active_disks;
297	sb->working_disks = info->array.working_disks;
298	memset(&sb->disks[info->disk.number], 0, sizeof(sb->disks[0]));
299	sb->disks[info->disk.number].number = info->disk.number;
300	sb->disks[info->disk.number].major = info->disk.major;
301	sb->disks[info->disk.number].minor = info->disk.minor;
302	sb->disks[info->disk.number].raid_disk = info->disk.raid_disk;
303	sb->disks[info->disk.number].state = info->disk.state;
304	if (sb->this_disk.number == info->disk.number)
305	sb->this_disk = sb->disks[info->disk.number];
306	}
307	if (strcmp(update, "resync") == 0) {
308	/* make sure resync happens */
309	sb->state &= ~(1<<MD_SB_CLEAN);
310	sb->recovery_cp = 0;
311	}
312
313	sb->sb_csum = calc_sb0_csum(sb);
314	return rv;
315	}
316
f9ce90ba	317	static __u64 event_super0(void *sbv)
4b1ac34b NB	318	{
	319	mdp_super_t *sb = sbv;
	320	return md_event(sb);
	321	}
	322
	323
	324
82d9eba6	325	static int init_super0(void *sbp, mdu_array_info_t info)
4b1ac34b NB	326	{
4b1ac34b NB	327	mdp_super_t *sb = malloc(MD_SB_BYTES);
82d9eba6	328	int spares;
4b1ac34b NB	329	memset(sb, 0, MD_SB_BYTES);
4b1ac34b NB	330
f9ce90ba NB	331	if (info->major_version == -1) {
f9ce90ba NB	332	/* zeroing the superblock */
82d9eba6 NB	333	return 0;
	334	}
	335
	336	spares = info->working_disks - info->active_disks;
	337	if (info->raid_disks + spares > MD_SB_DISKS) {
	338	fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n",
	339	info->raid_disks , spares, MD_SB_DISKS);
	340	return 0;
f9ce90ba NB	341	}
f9ce90ba NB	342
4b1ac34b NB	343	sb->md_magic = MD_SB_MAGIC;
	344	sb->major_version = 0;
	345	sb->minor_version = 90;
	346	sb->patch_version = 0;
	347	sb->gvalid_words = 0; /* ignored */
	348	sb->set_uuid0 = random();
	349	sb->ctime = time(0);
	350	sb->level = info->level;
	351	sb->size = info->size;
	352	sb->nr_disks = info->nr_disks;
	353	sb->raid_disks = info->raid_disks;
	354	sb->md_minor = info->md_minor;
	355	sb->not_persistent = 0;
	356	sb->set_uuid1 = random();
	357	sb->set_uuid2 = random();
	358	sb->set_uuid3 = random();
	359
	360	sb->utime = sb->ctime;
	361	sb->state = info->state;
	362	sb->active_disks = info->active_disks;
	363	sb->working_disks = info->working_disks;
	364	sb->failed_disks = info->failed_disks;
	365	sb->events_hi = 0;
	366	sb->events_lo = 1;
	367
	368	sb->layout = info->layout;
	369	sb->chunk_size = info->chunk_size;
	370
	371	*sbp = sb;
82d9eba6	372	return 1;
4b1ac34b NB	373	}
	374
	375	/* Add a device to the superblock being created */
f9ce90ba	376	static void add_to_super0(void sbv, mdu_disk_info_t dinfo)
4b1ac34b NB	377	{
	378	mdp_super_t *sb = sbv;
	379	mdp_disk_t *dk = &sb->disks[dinfo->number];
	380
	381	dk->number = dinfo->number;
	382	dk->major = dinfo->major;
	383	dk->minor = dinfo->minor;
	384	dk->raid_disk = dinfo->raid_disk;
	385	dk->state = dinfo->state;
	386	}
	387
f9ce90ba	388	static int store_super0(int fd, void *sbv)
4b1ac34b NB	389	{
	390	unsigned long size;
	391	unsigned long long dsize;
	392	unsigned long long offset;
f9ce90ba	393	mdp_super_t *super = sbv;
4b1ac34b NB	394
	395	#ifdef BLKGETSIZE64
	396	if (ioctl(fd, BLKGETSIZE64, &dsize) != 0)
	397	#endif
	398	{
	399	if (ioctl(fd, BLKGETSIZE, &size))
	400	return 1;
	401	else
	402	dsize = ((unsigned long long)size)<<9;
	403	}
	404
	405	if (dsize < MD_RESERVED_SECTORS*2)
	406	return 2;
	407
	408	offset = MD_NEW_SIZE_SECTORS(dsize>>9);
	409
	410	offset *= 512;
	411
	412	if (lseek64(fd, offset, 0)< 0LL)
	413	return 3;
	414
	415	if (write(fd, super, sizeof(super)) != sizeof(super))
	416	return 4;
	417
	418	return 0;
	419	}
	420
82d9eba6	421	static int write_init_super0(struct supertype st, void sbv, mdu_disk_info_t dinfo, char devname)
4b1ac34b NB	422	{
	423	mdp_super_t *sb = sbv;
	424	int fd = open(devname, O_RDWR, O_EXCL);
	425	int rv;
	426
	427	if (fd < 0) {
	428	fprintf(stderr, Name ": Failed to open %s to write superblock\n", devname);
	429	return -1;
	430	}
	431
	432	sb->this_disk = sb->disks[dinfo->number];
	433	sb->sb_csum = calc_sb0_csum(sb);
	434	rv = store_super0(fd, sb);
	435	close(fd);
	436	if (rv)
	437	fprintf(stderr, Name ": failed to write superblock to %s\n", devname);
	438	return rv;
	439	}
	440
f9ce90ba	441	static int compare_super0(void *firstp, void secondv)
4b1ac34b NB	442	{
	443	/*
	444	* return:
	445	* 0 same, or first was empty, and second was copied
	446	* 1 second had wrong number
	447	* 2 wrong uuid
	448	* 3 wrong other info
	449	*/
	450	mdp_super_t first = firstp;
	451	mdp_super_t *second = secondv;
	452
	453	int uuid1[4], uuid2[4];
	454	if (second->md_magic != MD_SB_MAGIC)
	455	return 1;
	456	if (!first) {
	457	first = malloc(MD_SB_BYTES);
	458	memcpy(first, second, MD_SB_BYTES);
	459	*firstp = first;
	460	return 0;
	461	}
	462
	463	uuid_from_super0(uuid1, first);
	464	uuid_from_super0(uuid2, second);
	465	if (!same_uuid(uuid1, uuid2))
	466	return 2;
	467	if (first->major_version != second->major_version \|\|
	468	first->minor_version != second->minor_version \|\|
	469	first->patch_version != second->patch_version \|\|
	470	first->gvalid_words != second->gvalid_words \|\|
	471	first->ctime != second->ctime \|\|
	472	first->level != second->level \|\|
	473	first->size != second->size \|\|
	474	first->raid_disks != second->raid_disks )
	475	return 3;
	476
	477	return 0;
	478	}
	479
	480
82d9eba6	481	static int load_super0(struct supertype st, int fd, void sbp, char devname)
4b1ac34b NB	482	{
	483	/* try to read in the superblock
	484	* Return:
	485	* 0 on success
	486	* 1 on cannot get superblock
	487	* 2 on superblock meaningless
	488	*/
	489	unsigned long size;
	490	unsigned long long dsize;
	491	unsigned long long offset;
	492	mdp_super_t *super;
	493
	494	#ifdef BLKGETSIZE64
	495	if (ioctl(fd, BLKGETSIZE64, &dsize) != 0)
	496	#endif
	497	{
	498	if (ioctl(fd, BLKGETSIZE, &size)) {
	499	if (devname)
	500	fprintf(stderr, Name ": cannot find device size for %s: %s\n",
	501	devname, strerror(errno));
	502	return 1;
	503	} else
	504	dsize = size << 9;
	505	}
	506
	507	if (dsize < MD_RESERVED_SECTORS*2) {
	508	if (devname)
	509	fprintf(stderr, Name ": %s is too small for md: size is %ld sectors.\n",
	510	devname, size);
	511	return 1;
	512	}
	513
	514	offset = MD_NEW_SIZE_SECTORS(dsize>>9);
	515
	516	offset *= 512;
	517
	518	ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */
	519
	520	if (lseek64(fd, offset, 0)< 0LL) {
	521	if (devname)
	522	fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n",
	523	devname, strerror(errno));
	524	return 1;
	525	}
	526
	527	super = malloc(MD_SB_BYTES);
	528
	529	if (read(fd, super, sizeof(*super)) != MD_SB_BYTES) {
	530	if (devname)
	531	fprintf(stderr, Name ": Cannot read superblock on %s\n",
	532	devname);
	533	free(super);
	534	return 1;
	535	}
	536
	537	if (super->md_magic != MD_SB_MAGIC) {
	538	if (devname)
	539	fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n",
	540	devname, MD_SB_MAGIC, super->md_magic);
	541	free(super);
	542	return 2;
	543	}
	544
	545	if (super->major_version != 0) {
546	if (devname)
547	fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n",
548	devname, super->major_version);
549	free(super);
550	return 2;
551	}
552	*sbp = super;
82d9eba6 NB	553	if (st->ss == NULL) {
	554	st->ss = &super0;
	555	st->minor_version = 90;
	556	}
	557
4b1ac34b NB	558	return 0;
4b1ac34b NB	559	}
f9ce90ba	560
82d9eba6	561	static struct supertype match_metadata_desc0(char arg)
f9ce90ba	562	{
82d9eba6 NB	563	struct supertype st = malloc(sizeof(st));
	564	if (!st) return st;
	565
	566	st->ss = &super0;
	567	st->minor_version = 90;
f9ce90ba NB	568	if (strcmp(arg, "0") == 0 \|\|
	569	strcmp(arg, "0.90") == 0 \|\|
	570	strcmp(arg, "default") == 0
	571	)
82d9eba6 NB	572	return st;
	573
	574	free(st);
	575	return NULL;
	576	}
	577
	578	static __u64 avail_size0(__u64 devsize)
	579	{
	580	if (devsize < MD_RESERVED_SECTORS*2)
	581	return 0ULL;
	582	return MD_NEW_SIZE_SECTORS(devsize);
f9ce90ba NB	583	}
	584
	585	struct superswitch super0 = {
	586	.examine_super = examine_super0,
	587	.brief_examine_super = brief_examine_super0,
	588	.detail_super = detail_super0,
	589	.brief_detail_super = brief_detail_super0,
	590	.uuid_from_super = uuid_from_super0,
	591	.getinfo_super = getinfo_super0,
	592	.update_super = update_super0,
	593	.event_super = event_super0,
	594	.init_super = init_super0,
	595	.add_to_super = add_to_super0,
	596	.store_super = store_super0,
	597	.write_init_super = write_init_super0,
	598	.compare_super = compare_super0,
	599	.load_super = load_super0,
	600	.match_metadata_desc = match_metadata_desc0,
82d9eba6 NB	601	.avail_size = avail_size0,
82d9eba6 NB	602	.major = 0,
f9ce90ba	603	};