And here's another trivial bugfix, now for spelling mistakes in various places, authred by Sergey Kirpichev (Cc'ed) and carried in debian mdadm package. Signed-off-by: NeilBrown <neilb@suse.de>
1218 lines
32 KiB
C
1218 lines
32 KiB
C
/*
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* mdadm - manage Linux "md" devices aka RAID arrays.
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*
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* Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Neil Brown
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* Email: <neilb@suse.de>
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*/
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#define HAVE_STDINT_H 1
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#include "mdadm.h"
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#include "sha1.h"
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/*
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* All handling for the 0.90.0 version superblock is in
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* this file.
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* This includes:
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* - finding, loading, and writing the superblock.
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* - initialising a new superblock
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* - printing the superblock for --examine
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* - printing part of the superblock for --detail
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* .. other stuff
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*/
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static unsigned long calc_sb0_csum(mdp_super_t *super)
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{
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unsigned long csum = super->sb_csum;
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unsigned long newcsum;
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super->sb_csum= 0 ;
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newcsum = calc_csum(super, MD_SB_BYTES);
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super->sb_csum = csum;
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return newcsum;
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}
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static void super0_swap_endian(struct mdp_superblock_s *sb)
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{
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/* as super0 superblocks are host-endian, it is sometimes
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* useful to be able to swap the endianness
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* as (almost) everything is u32's we byte-swap every 4byte
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* number.
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* We then also have to swap the events_hi and events_lo
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*/
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char *sbc = (char *)sb;
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__u32 t32;
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int i;
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for (i=0; i < MD_SB_BYTES ; i+=4) {
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char t = sbc[i];
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sbc[i] = sbc[i+3];
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sbc[i+3] = t;
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t=sbc[i+1];
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sbc[i+1]=sbc[i+2];
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sbc[i+2]=t;
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}
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t32 = sb->events_hi;
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sb->events_hi = sb->events_lo;
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sb->events_lo = t32;
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t32 = sb->cp_events_hi;
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sb->cp_events_hi = sb->cp_events_lo;
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sb->cp_events_lo = t32;
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}
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#ifndef MDASSEMBLE
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static void examine_super0(struct supertype *st, char *homehost)
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{
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mdp_super_t *sb = st->sb;
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time_t atime;
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int d;
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int delta_extra = 0;
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char *c;
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printf(" Magic : %08x\n", sb->md_magic);
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printf(" Version : %d.%02d.%02d\n", sb->major_version, sb->minor_version,
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sb->patch_version);
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if (sb->minor_version >= 90) {
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printf(" UUID : %08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1,
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sb->set_uuid2, sb->set_uuid3);
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if (homehost) {
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char buf[20];
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void *hash = sha1_buffer(homehost,
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strlen(homehost),
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buf);
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if (memcmp(&sb->set_uuid2, hash, 8)==0)
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printf(" (local to host %s)", homehost);
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}
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printf("\n");
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} else
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printf(" UUID : %08x\n", sb->set_uuid0);
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if (sb->not_persistent)
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printf(" Eedk : not persistent\n");
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atime = sb->ctime;
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printf(" Creation Time : %.24s\n", ctime(&atime));
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c=map_num(pers, sb->level);
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printf(" Raid Level : %s\n", c?c:"-unknown-");
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if ((int)sb->level > 0) {
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int ddsks = 0, ddsks_denom = 1;
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printf(" Used Dev Size : %d%s\n", sb->size,
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human_size((long long)sb->size<<10));
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switch(sb->level) {
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case 1: ddsks=1;break;
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case 4:
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case 5: ddsks = sb->raid_disks-1; break;
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case 6: ddsks = sb->raid_disks-2; break;
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case 10: ddsks = sb->raid_disks;
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ddsks_denom = (sb->layout&255) * ((sb->layout>>8)&255);
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}
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if (ddsks) {
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long long asize = sb->size;
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asize = (asize << 10) * ddsks / ddsks_denom;
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printf(" Array Size : %llu%s\n",
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asize >> 10, human_size(asize));
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}
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}
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printf(" Raid Devices : %d\n", sb->raid_disks);
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printf(" Total Devices : %d\n", sb->nr_disks);
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printf("Preferred Minor : %d\n", sb->md_minor);
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printf("\n");
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if (sb->minor_version > 90 && (sb->reshape_position+1) != 0) {
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printf(" Reshape pos'n : %llu%s\n", (unsigned long long)sb->reshape_position/2, human_size((long long)sb->reshape_position<<9));
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if (sb->delta_disks) {
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printf(" Delta Devices : %d", sb->delta_disks);
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printf(" (%d->%d)\n", sb->raid_disks-sb->delta_disks, sb->raid_disks);
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if (((int)sb->delta_disks) < 0)
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delta_extra = - sb->delta_disks;
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}
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if (sb->new_level != sb->level) {
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c = map_num(pers, sb->new_level);
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printf(" New Level : %s\n", c?c:"-unknown-");
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}
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if (sb->new_layout != sb->layout) {
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if (sb->level == 5) {
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c = map_num(r5layout, sb->new_layout);
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printf(" New Layout : %s\n", c?c:"-unknown-");
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}
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if (sb->level == 6) {
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c = map_num(r6layout, sb->new_layout);
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printf(" New Layout : %s\n", c?c:"-unknown-");
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}
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if (sb->level == 10) {
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printf(" New Layout : near=%d, %s=%d\n",
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sb->new_layout&255,
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(sb->new_layout&0x10000)?"offset":"far",
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(sb->new_layout>>8)&255);
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}
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}
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if (sb->new_chunk != sb->chunk_size)
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printf(" New Chunksize : %d\n", sb->new_chunk);
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printf("\n");
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}
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atime = sb->utime;
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printf(" Update Time : %.24s\n", ctime(&atime));
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printf(" State : %s\n",
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(sb->state&(1<<MD_SB_CLEAN))?"clean":"active");
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if (sb->state & (1<<MD_SB_BITMAP_PRESENT))
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printf("Internal Bitmap : present\n");
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printf(" Active Devices : %d\n", sb->active_disks);
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printf("Working Devices : %d\n", sb->working_disks);
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printf(" Failed Devices : %d\n", sb->failed_disks);
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printf(" Spare Devices : %d\n", sb->spare_disks);
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if (calc_sb0_csum(sb) == sb->sb_csum)
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printf(" Checksum : %x - correct\n", sb->sb_csum);
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else
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printf(" Checksum : %x - expected %lx\n", sb->sb_csum, calc_sb0_csum(sb));
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printf(" Events : %llu\n",
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((unsigned long long)sb->events_hi << 32)
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+ sb->events_lo);
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printf("\n");
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if (sb->level == 5) {
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c = map_num(r5layout, sb->layout);
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printf(" Layout : %s\n", c?c:"-unknown-");
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}
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if (sb->level == 6) {
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c = map_num(r6layout, sb->layout);
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printf(" Layout : %s\n", c?c:"-unknown-");
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}
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if (sb->level == 10) {
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printf(" Layout :");
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print_r10_layout(sb->layout);
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printf("\n");
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}
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switch(sb->level) {
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case 0:
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case 4:
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case 5:
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case 6:
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case 10:
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printf(" Chunk Size : %dK\n", sb->chunk_size/1024);
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break;
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case -1:
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printf(" Rounding : %dK\n", sb->chunk_size/1024);
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break;
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default: break;
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}
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printf("\n");
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printf(" Number Major Minor RaidDevice State\n");
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for (d= -1; d<(signed int)(sb->raid_disks+delta_extra + sb->spare_disks); d++) {
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mdp_disk_t *dp;
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char *dv;
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char nb[5];
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int wonly;
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if (d>=0) dp = &sb->disks[d];
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else dp = &sb->this_disk;
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snprintf(nb, sizeof(nb), "%4d", d);
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printf("%4s %5d %5d %5d %5d ", d < 0 ? "this" : nb,
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dp->number, dp->major, dp->minor, dp->raid_disk);
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wonly = dp->state & (1<<MD_DISK_WRITEMOSTLY);
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dp->state &= ~(1<<MD_DISK_WRITEMOSTLY);
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if (dp->state & (1<<MD_DISK_FAULTY)) printf(" faulty");
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if (dp->state & (1<<MD_DISK_ACTIVE)) printf(" active");
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if (dp->state & (1<<MD_DISK_SYNC)) printf(" sync");
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if (dp->state & (1<<MD_DISK_REMOVED)) printf(" removed");
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if (wonly) printf(" write-mostly");
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if (dp->state == 0) printf(" spare");
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if ((dv=map_dev(dp->major, dp->minor, 0)))
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printf(" %s", dv);
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printf("\n");
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if (d == -1) printf("\n");
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}
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}
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static void brief_examine_super0(struct supertype *st, int verbose)
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{
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mdp_super_t *sb = st->sb;
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char *c=map_num(pers, sb->level);
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char devname[20];
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sprintf(devname, "/dev/md%d", sb->md_minor);
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if (verbose) {
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printf("ARRAY %s level=%s num-devices=%d",
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devname,
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c?c:"-unknown-", sb->raid_disks);
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} else
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printf("ARRAY %s", devname);
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if (sb->minor_version >= 90)
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printf(" UUID=%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1,
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sb->set_uuid2, sb->set_uuid3);
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else
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printf(" UUID=%08x", sb->set_uuid0);
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printf("\n");
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}
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static void export_examine_super0(struct supertype *st)
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{
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mdp_super_t *sb = st->sb;
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printf("MD_LEVEL=%s\n", map_num(pers, sb->level));
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printf("MD_DEVICES=%d\n", sb->raid_disks);
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if (sb->minor_version >= 90)
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printf("MD_UUID=%08x:%08x:%08x:%08x\n",
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sb->set_uuid0, sb->set_uuid1,
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sb->set_uuid2, sb->set_uuid3);
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else
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printf("MD_UUID=%08x\n", sb->set_uuid0);
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printf("MD_UPDATE_TIME=%llu\n",
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__le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL);
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printf("MD_EVENTS=%llu\n",
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((unsigned long long)sb->events_hi << 32)
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+ sb->events_lo);
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}
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static void detail_super0(struct supertype *st, char *homehost)
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{
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mdp_super_t *sb = st->sb;
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printf(" UUID : ");
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if (sb->minor_version >= 90)
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printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1,
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sb->set_uuid2, sb->set_uuid3);
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else
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printf("%08x", sb->set_uuid0);
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if (homehost) {
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char buf[20];
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void *hash = sha1_buffer(homehost,
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strlen(homehost),
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buf);
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if (memcmp(&sb->set_uuid2, hash, 8)==0)
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printf(" (local to host %s)", homehost);
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}
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printf("\n Events : %d.%d\n\n", sb->events_hi, sb->events_lo);
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}
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static void brief_detail_super0(struct supertype *st)
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{
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mdp_super_t *sb = st->sb;
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printf(" UUID=");
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if (sb->minor_version >= 90)
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printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1,
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sb->set_uuid2, sb->set_uuid3);
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else
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printf("%08x", sb->set_uuid0);
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}
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#endif
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static int match_home0(struct supertype *st, char *homehost)
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{
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mdp_super_t *sb = st->sb;
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char buf[20];
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char *hash;
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if (!homehost)
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return 0;
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hash = sha1_buffer(homehost,
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strlen(homehost),
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buf);
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return (memcmp(&sb->set_uuid2, hash, 8)==0);
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}
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static void uuid_from_super0(struct supertype *st, int uuid[4])
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{
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mdp_super_t *super = st->sb;
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uuid[0] = super->set_uuid0;
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if (super->minor_version >= 90) {
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uuid[1] = super->set_uuid1;
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uuid[2] = super->set_uuid2;
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uuid[3] = super->set_uuid3;
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} else {
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uuid[1] = 0;
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uuid[2] = 0;
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uuid[3] = 0;
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}
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}
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static void getinfo_super0(struct supertype *st, struct mdinfo *info, char *map)
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{
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mdp_super_t *sb = st->sb;
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int working = 0;
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int i;
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int map_disks = info->array.raid_disks;
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memset(info, 0, sizeof(*info));
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info->array.major_version = sb->major_version;
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info->array.minor_version = sb->minor_version;
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info->array.patch_version = sb->patch_version;
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info->array.raid_disks = sb->raid_disks;
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info->array.level = sb->level;
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info->array.layout = sb->layout;
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info->array.md_minor = sb->md_minor;
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info->array.ctime = sb->ctime;
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info->array.utime = sb->utime;
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info->array.chunk_size = sb->chunk_size;
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info->array.state = sb->state;
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info->component_size = sb->size*2;
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if (sb->state & (1<<MD_SB_BITMAP_PRESENT))
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info->bitmap_offset = 8;
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info->disk.state = sb->this_disk.state;
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info->disk.major = sb->this_disk.major;
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info->disk.minor = sb->this_disk.minor;
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info->disk.raid_disk = sb->this_disk.raid_disk;
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info->disk.number = sb->this_disk.number;
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info->events = md_event(sb);
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info->data_offset = 0;
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sprintf(info->text_version, "0.%d", sb->minor_version);
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info->safe_mode_delay = 200;
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uuid_from_super0(st, info->uuid);
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info->recovery_start = MaxSector;
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if (sb->minor_version > 90 && (sb->reshape_position+1) != 0) {
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info->reshape_active = 1;
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info->reshape_progress = sb->reshape_position;
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info->new_level = sb->new_level;
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info->delta_disks = sb->delta_disks;
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info->new_layout = sb->new_layout;
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info->new_chunk = sb->new_chunk;
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if (info->delta_disks < 0)
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info->array.raid_disks -= info->delta_disks;
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} else
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info->reshape_active = 0;
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info->recovery_blocked = info->reshape_active;
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sprintf(info->name, "%d", sb->md_minor);
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/* work_disks is calculated rather than read directly */
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for (i=0; i < MD_SB_DISKS; i++)
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if ((sb->disks[i].state & (1<<MD_DISK_SYNC)) &&
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(sb->disks[i].raid_disk < (unsigned)info->array.raid_disks) &&
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(sb->disks[i].state & (1<<MD_DISK_ACTIVE)) &&
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!(sb->disks[i].state & (1<<MD_DISK_FAULTY))) {
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working ++;
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if (map && i < map_disks)
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map[i] = 1;
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} else if (map && i < map_disks)
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map[i] = 0;
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info->array.working_disks = working;
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}
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static struct mdinfo *container_content0(struct supertype *st, char *subarray)
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{
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struct mdinfo *info;
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if (subarray)
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return NULL;
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info = xmalloc(sizeof(*info));
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getinfo_super0(st, info, NULL);
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return info;
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}
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static int update_super0(struct supertype *st, struct mdinfo *info,
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char *update,
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char *devname, int verbose,
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int uuid_set, char *homehost)
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{
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/* NOTE: for 'assemble' and 'force' we need to return non-zero
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* if any change was made. For others, the return value is
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* ignored.
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*/
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int rv = 0;
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int uuid[4];
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mdp_super_t *sb = st->sb;
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if (strcmp(update, "sparc2.2")==0 ) {
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/* 2.2 sparc put the events in the wrong place
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* So we copy the tail of the superblock
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* up 4 bytes before continuing
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*/
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__u32 *sb32 = (__u32*)sb;
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memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7,
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sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1,
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(MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4);
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if (verbose >= 0)
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pr_err("adjusting superblock of %s for 2.2/sparc compatibility.\n",
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devname);
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} else if (strcmp(update, "super-minor") ==0) {
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sb->md_minor = info->array.md_minor;
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if (verbose > 0)
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pr_err("updating superblock of %s with minor number %d\n",
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devname, info->array.md_minor);
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} else if (strcmp(update, "summaries") == 0) {
|
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unsigned int i;
|
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/* 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;
|
|
} else if (strcmp(update, "force-one")==0) {
|
|
/* Not enough devices for a working array, so
|
|
* bring this one up-to-date.
|
|
*/
|
|
__u32 ehi = sb->events_hi, elo = sb->events_lo;
|
|
sb->events_hi = (info->events>>32) & 0xFFFFFFFF;
|
|
sb->events_lo = (info->events) & 0xFFFFFFFF;
|
|
if (sb->events_hi != ehi ||
|
|
sb->events_lo != elo)
|
|
rv = 1;
|
|
} else if (strcmp(update, "force-array")==0) {
|
|
/* degraded array and 'force' requested, so
|
|
* maybe need to mark it 'clean'
|
|
*/
|
|
if ((sb->level == 5 || sb->level == 4 || sb->level == 6) &&
|
|
(sb->state & (1 << MD_SB_CLEAN)) == 0) {
|
|
/* need to force clean */
|
|
sb->state |= (1 << MD_SB_CLEAN);
|
|
rv = 1;
|
|
}
|
|
} else if (strcmp(update, "assemble")==0) {
|
|
int d = info->disk.number;
|
|
int wonly = sb->disks[d].state & (1<<MD_DISK_WRITEMOSTLY);
|
|
int mask = (1<<MD_DISK_WRITEMOSTLY);
|
|
int add = 0;
|
|
if (sb->minor_version >= 91)
|
|
/* During reshape we don't insist on everything
|
|
* being marked 'sync'
|
|
*/
|
|
add = (1<<MD_DISK_SYNC);
|
|
if (((sb->disks[d].state & ~mask) | add)
|
|
!= (unsigned)info->disk.state) {
|
|
sb->disks[d].state = info->disk.state | wonly;
|
|
rv = 1;
|
|
}
|
|
if (info->reshape_active &&
|
|
sb->minor_version > 90 && (sb->reshape_position+1) != 0 &&
|
|
info->delta_disks >= 0 &&
|
|
info->reshape_progress < sb->reshape_position) {
|
|
sb->reshape_position = info->reshape_progress;
|
|
rv = 1;
|
|
}
|
|
if (info->reshape_active &&
|
|
sb->minor_version > 90 && (sb->reshape_position+1) != 0 &&
|
|
info->delta_disks < 0 &&
|
|
info->reshape_progress > sb->reshape_position) {
|
|
sb->reshape_position = info->reshape_progress;
|
|
rv = 1;
|
|
}
|
|
} else if (strcmp(update, "linear-grow-new") == 0) {
|
|
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;
|
|
sb->this_disk = sb->disks[info->disk.number];
|
|
} else if (strcmp(update, "linear-grow-update") == 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;
|
|
} else if (strcmp(update, "resync") == 0) {
|
|
/* make sure resync happens */
|
|
sb->state &= ~(1<<MD_SB_CLEAN);
|
|
sb->recovery_cp = 0;
|
|
} else if (strcmp(update, "homehost") == 0 &&
|
|
homehost) {
|
|
uuid_set = 0;
|
|
update = "uuid";
|
|
info->uuid[0] = sb->set_uuid0;
|
|
info->uuid[1] = sb->set_uuid1;
|
|
} else if (strcmp(update, "uuid") == 0) {
|
|
if (!uuid_set && homehost) {
|
|
char buf[20];
|
|
char *hash = sha1_buffer(homehost,
|
|
strlen(homehost),
|
|
buf);
|
|
memcpy(info->uuid+2, hash, 8);
|
|
}
|
|
sb->set_uuid0 = info->uuid[0];
|
|
sb->set_uuid1 = info->uuid[1];
|
|
sb->set_uuid2 = info->uuid[2];
|
|
sb->set_uuid3 = info->uuid[3];
|
|
if (sb->state & (1<<MD_SB_BITMAP_PRESENT)) {
|
|
struct bitmap_super_s *bm;
|
|
bm = (struct bitmap_super_s*)(sb+1);
|
|
uuid_from_super0(st, uuid);
|
|
memcpy(bm->uuid, uuid, 16);
|
|
}
|
|
} else if (strcmp(update, "no-bitmap") == 0) {
|
|
sb->state &= ~(1<<MD_SB_BITMAP_PRESENT);
|
|
} else if (strcmp(update, "_reshape_progress")==0)
|
|
sb->reshape_position = info->reshape_progress;
|
|
else if (strcmp(update, "writemostly")==0)
|
|
sb->state |= (1<<MD_DISK_WRITEMOSTLY);
|
|
else if (strcmp(update, "readwrite")==0)
|
|
sb->state &= ~(1<<MD_DISK_WRITEMOSTLY);
|
|
else
|
|
rv = -1;
|
|
|
|
sb->sb_csum = calc_sb0_csum(sb);
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* For verion-0 superblock, the homehost is 'stored' in the
|
|
* uuid. 8 bytes for a hash of the host leaving 8 bytes
|
|
* of random material.
|
|
* We use the first 8 bytes (64bits) of the sha1 of the
|
|
* host name
|
|
*/
|
|
|
|
|
|
static int init_super0(struct supertype *st, mdu_array_info_t *info,
|
|
unsigned long long size, char *ignored_name, char *homehost,
|
|
int *uuid, unsigned long long data_offset)
|
|
{
|
|
mdp_super_t *sb;
|
|
int spares;
|
|
|
|
if (data_offset != INVALID_SECTORS) {
|
|
fprintf(stderr, Name ": data-offset not support for 0.90\n");
|
|
return 0;
|
|
}
|
|
|
|
if (posix_memalign((void**)&sb, 4096,
|
|
MD_SB_BYTES + ROUND_UP(sizeof(bitmap_super_t), 4096)) != 0) {
|
|
pr_err("%s could not allocate superblock\n", __func__);
|
|
return 0;
|
|
}
|
|
memset(sb, 0, MD_SB_BYTES + sizeof(bitmap_super_t));
|
|
|
|
st->sb = sb;
|
|
if (info == NULL) {
|
|
/* zeroing the superblock */
|
|
return 0;
|
|
}
|
|
|
|
spares = info->working_disks - info->active_disks;
|
|
if (info->raid_disks + spares > MD_SB_DISKS) {
|
|
pr_err("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->ctime = time(0);
|
|
sb->level = info->level;
|
|
if (size != (unsigned long long)info->size)
|
|
return 0;
|
|
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;
|
|
if (uuid) {
|
|
sb->set_uuid0 = uuid[0];
|
|
sb->set_uuid1 = uuid[1];
|
|
sb->set_uuid2 = uuid[2];
|
|
sb->set_uuid3 = uuid[3];
|
|
} else {
|
|
int rfd = open("/dev/urandom", O_RDONLY);
|
|
if (rfd < 0 || read(rfd, &sb->set_uuid0, 4) != 4)
|
|
sb->set_uuid0 = random();
|
|
if (rfd < 0 || read(rfd, &sb->set_uuid1, 12) != 12) {
|
|
sb->set_uuid1 = random();
|
|
sb->set_uuid2 = random();
|
|
sb->set_uuid3 = random();
|
|
}
|
|
if (rfd >= 0)
|
|
close(rfd);
|
|
}
|
|
if (homehost && !uuid) {
|
|
char buf[20];
|
|
char *hash = sha1_buffer(homehost,
|
|
strlen(homehost),
|
|
buf);
|
|
memcpy(&sb->set_uuid2, hash, 8);
|
|
}
|
|
|
|
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->spare_disks = info->spare_disks;
|
|
sb->events_hi = 0;
|
|
sb->events_lo = 1;
|
|
|
|
sb->layout = info->layout;
|
|
sb->chunk_size = info->chunk_size;
|
|
|
|
return 1;
|
|
}
|
|
|
|
struct devinfo {
|
|
int fd;
|
|
char *devname;
|
|
mdu_disk_info_t disk;
|
|
struct devinfo *next;
|
|
};
|
|
|
|
#ifndef MDASSEMBLE
|
|
/* Add a device to the superblock being created */
|
|
static int add_to_super0(struct supertype *st, mdu_disk_info_t *dinfo,
|
|
int fd, char *devname, unsigned long long data_offset)
|
|
{
|
|
mdp_super_t *sb = st->sb;
|
|
mdp_disk_t *dk = &sb->disks[dinfo->number];
|
|
struct devinfo *di, **dip;
|
|
|
|
dk->number = dinfo->number;
|
|
dk->major = dinfo->major;
|
|
dk->minor = dinfo->minor;
|
|
dk->raid_disk = dinfo->raid_disk;
|
|
dk->state = dinfo->state;
|
|
/* In case our source disk was writemostly, don't copy that bit */
|
|
dk->state &= ~(1<<MD_DISK_WRITEMOSTLY);
|
|
|
|
sb->this_disk = sb->disks[dinfo->number];
|
|
sb->sb_csum = calc_sb0_csum(sb);
|
|
|
|
dip = (struct devinfo **)&st->info;
|
|
while (*dip)
|
|
dip = &(*dip)->next;
|
|
di = xmalloc(sizeof(struct devinfo));
|
|
di->fd = fd;
|
|
di->devname = devname;
|
|
di->disk = *dinfo;
|
|
di->next = NULL;
|
|
*dip = di;
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int store_super0(struct supertype *st, int fd)
|
|
{
|
|
unsigned long long dsize;
|
|
unsigned long long offset;
|
|
mdp_super_t *super = st->sb;
|
|
|
|
if (!get_dev_size(fd, NULL, &dsize))
|
|
return 1;
|
|
|
|
if (dsize < MD_RESERVED_SECTORS*512)
|
|
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;
|
|
|
|
if (super->state & (1<<MD_SB_BITMAP_PRESENT)) {
|
|
struct bitmap_super_s * bm = (struct bitmap_super_s*)(super+1);
|
|
if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC)
|
|
if (write(fd, bm, ROUND_UP(sizeof(*bm),4096)) !=
|
|
ROUND_UP(sizeof(*bm),4096))
|
|
return 5;
|
|
}
|
|
|
|
fsync(fd);
|
|
return 0;
|
|
}
|
|
|
|
#ifndef MDASSEMBLE
|
|
static int write_init_super0(struct supertype *st)
|
|
{
|
|
mdp_super_t *sb = st->sb;
|
|
int rv = 0;
|
|
struct devinfo *di;
|
|
|
|
for (di = st->info ; di && ! rv ; di = di->next) {
|
|
|
|
if (di->disk.state == 1)
|
|
continue;
|
|
if (di->fd == -1)
|
|
continue;
|
|
while (Kill(di->devname, NULL, 0, -1, 1) == 0)
|
|
;
|
|
|
|
sb->disks[di->disk.number].state &= ~(1<<MD_DISK_FAULTY);
|
|
|
|
sb->this_disk = sb->disks[di->disk.number];
|
|
sb->sb_csum = calc_sb0_csum(sb);
|
|
rv = store_super0(st, di->fd);
|
|
|
|
if (rv == 0 && (sb->state & (1<<MD_SB_BITMAP_PRESENT)))
|
|
rv = st->ss->write_bitmap(st, di->fd);
|
|
|
|
if (rv)
|
|
pr_err("failed to write superblock to %s\n",
|
|
di->devname);
|
|
}
|
|
return rv;
|
|
}
|
|
#endif
|
|
|
|
static int compare_super0(struct supertype *st, struct supertype *tst)
|
|
{
|
|
/*
|
|
* 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 = st->sb;
|
|
mdp_super_t *second = tst->sb;
|
|
int uuid1[4], uuid2[4];
|
|
|
|
if (second->md_magic != MD_SB_MAGIC)
|
|
return 1;
|
|
if (!first) {
|
|
if (posix_memalign((void**)&first, 4096,
|
|
MD_SB_BYTES +
|
|
ROUND_UP(sizeof(struct bitmap_super_s), 4096)) != 0) {
|
|
pr_err("%s could not allocate superblock\n", __func__);
|
|
return 1;
|
|
}
|
|
memcpy(first, second, MD_SB_BYTES + sizeof(struct bitmap_super_s));
|
|
st->sb = first;
|
|
return 0;
|
|
}
|
|
|
|
uuid_from_super0(st, uuid1);
|
|
uuid_from_super0(tst, uuid2);
|
|
if (!same_uuid(uuid1, uuid2, 0))
|
|
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 void free_super0(struct supertype *st);
|
|
|
|
static int load_super0(struct supertype *st, int fd, char *devname)
|
|
{
|
|
/* try to read in the superblock
|
|
* Return:
|
|
* 0 on success
|
|
* 1 on cannot get superblock
|
|
* 2 on superblock meaningless
|
|
*/
|
|
unsigned long long dsize;
|
|
unsigned long long offset;
|
|
mdp_super_t *super;
|
|
int uuid[4];
|
|
struct bitmap_super_s *bsb;
|
|
|
|
free_super0(st);
|
|
|
|
if (!get_dev_size(fd, devname, &dsize))
|
|
return 1;
|
|
|
|
if (dsize < MD_RESERVED_SECTORS*512) {
|
|
if (devname)
|
|
pr_err("%s is too small for md: size is %llu sectors.\n",
|
|
devname, dsize);
|
|
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)
|
|
pr_err("Cannot seek to superblock on %s: %s\n",
|
|
devname, strerror(errno));
|
|
return 1;
|
|
}
|
|
|
|
if (posix_memalign((void**)&super, 4096,
|
|
MD_SB_BYTES +
|
|
ROUND_UP(sizeof(bitmap_super_t), 4096)) != 0) {
|
|
pr_err("%s could not allocate superblock\n", __func__);
|
|
return 1;
|
|
}
|
|
|
|
if (read(fd, super, sizeof(*super)) != MD_SB_BYTES) {
|
|
if (devname)
|
|
pr_err("Cannot read superblock on %s\n",
|
|
devname);
|
|
free(super);
|
|
return 1;
|
|
}
|
|
|
|
if (st->ss && st->minor_version == 9)
|
|
super0_swap_endian(super);
|
|
|
|
if (super->md_magic != MD_SB_MAGIC) {
|
|
if (devname)
|
|
pr_err("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)
|
|
pr_err("Cannot interpret superblock on %s - version is %d\n",
|
|
devname, super->major_version);
|
|
free(super);
|
|
return 2;
|
|
}
|
|
st->sb = super;
|
|
|
|
if (st->ss == NULL) {
|
|
st->ss = &super0;
|
|
st->minor_version = super->minor_version;
|
|
st->max_devs = MD_SB_DISKS;
|
|
st->info = NULL;
|
|
}
|
|
|
|
/* Now check on the bitmap superblock */
|
|
if ((super->state & (1<<MD_SB_BITMAP_PRESENT)) == 0)
|
|
return 0;
|
|
/* Read the bitmap superblock and make sure it looks
|
|
* valid. If it doesn't clear the bit. An --assemble --force
|
|
* should get that written out.
|
|
*/
|
|
if (read(fd, super+1, ROUND_UP(sizeof(struct bitmap_super_s),4096))
|
|
!= ROUND_UP(sizeof(struct bitmap_super_s),4096))
|
|
goto no_bitmap;
|
|
|
|
uuid_from_super0(st, uuid);
|
|
bsb = (struct bitmap_super_s *)(super+1);
|
|
if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC ||
|
|
memcmp(bsb->uuid, uuid, 16) != 0)
|
|
goto no_bitmap;
|
|
return 0;
|
|
|
|
no_bitmap:
|
|
super->state &= ~(1<<MD_SB_BITMAP_PRESENT);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct supertype *match_metadata_desc0(char *arg)
|
|
{
|
|
struct supertype *st = xcalloc(1, sizeof(*st));
|
|
|
|
st->container_dev = NoMdDev;
|
|
st->ss = &super0;
|
|
st->info = NULL;
|
|
st->minor_version = 90;
|
|
st->max_devs = MD_SB_DISKS;
|
|
st->sb = NULL;
|
|
/* we sometimes get 00.90 */
|
|
while (arg[0] == '0' && arg[1] == '0')
|
|
arg++;
|
|
if (strcmp(arg, "0") == 0 ||
|
|
#ifdef DEFAULT_OLD_METADATA /* ifndef in super1.c */
|
|
strcmp(arg, "default") == 0 ||
|
|
#endif /* DEFAULT_OLD_METADATA */
|
|
strcmp(arg, "0.90") == 0 ||
|
|
strcmp(arg, "") == 0 /* no metadata - i.e. non_persistent */
|
|
)
|
|
return st;
|
|
|
|
st->minor_version = 91; /* reshape in progress */
|
|
if (strcmp(arg, "0.91") == 0) /* For dup_super support */
|
|
return st;
|
|
|
|
st->minor_version = 9; /* flag for 'byte-swapped' */
|
|
if (strcmp(arg, "0.swap")==0 ||
|
|
strcmp(arg, "0.9") == 0) /* For dup_super support */
|
|
return st;
|
|
|
|
free(st);
|
|
return NULL;
|
|
}
|
|
|
|
static __u64 avail_size0(struct supertype *st, __u64 devsize,
|
|
unsigned long long data_offset)
|
|
{
|
|
if (data_offset != 0 && data_offset != INVALID_SECTORS)
|
|
return 0ULL;
|
|
if (devsize < MD_RESERVED_SECTORS)
|
|
return 0ULL;
|
|
return MD_NEW_SIZE_SECTORS(devsize);
|
|
}
|
|
|
|
static int add_internal_bitmap0(struct supertype *st, int *chunkp,
|
|
int delay, int write_behind,
|
|
unsigned long long size, int may_change,
|
|
int major)
|
|
{
|
|
/*
|
|
* The bitmap comes immediately after the superblock and must be 60K in size
|
|
* at most. The default size is between 30K and 60K
|
|
*
|
|
* size is in sectors, chunk is in bytes !!!
|
|
*/
|
|
unsigned long long bits;
|
|
unsigned long long max_bits = (60*1024 - sizeof(bitmap_super_t))*8;
|
|
unsigned long long min_chunk;
|
|
int chunk = *chunkp;
|
|
mdp_super_t *sb = st->sb;
|
|
bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MD_SB_BYTES);
|
|
int uuid[4];
|
|
|
|
|
|
min_chunk = 4096; /* sub-page chunks don't work yet.. */
|
|
bits = (size * 512) / min_chunk + 1;
|
|
while (bits > max_bits) {
|
|
min_chunk *= 2;
|
|
bits = (bits+1)/2;
|
|
}
|
|
if (chunk == UnSet) {
|
|
/* A chunk size less than a few Megabytes gives poor
|
|
* performance without increasing resync noticeably
|
|
*/
|
|
chunk = min_chunk;
|
|
if (chunk < 64*1024*1024)
|
|
chunk = 64*1024*1024;
|
|
} else if ((unsigned long long)chunk < min_chunk)
|
|
return 0; /* chunk size too small */
|
|
|
|
sb->state |= (1<<MD_SB_BITMAP_PRESENT);
|
|
|
|
memset(bms, 0, sizeof(*bms));
|
|
bms->magic = __cpu_to_le32(BITMAP_MAGIC);
|
|
bms->version = __cpu_to_le32(major);
|
|
uuid_from_super0(st, uuid);
|
|
memcpy(bms->uuid, uuid, 16);
|
|
bms->chunksize = __cpu_to_le32(chunk);
|
|
bms->daemon_sleep = __cpu_to_le32(delay);
|
|
bms->sync_size = __cpu_to_le64(size);
|
|
bms->write_behind = __cpu_to_le32(write_behind);
|
|
*chunkp = chunk;
|
|
return 1;
|
|
}
|
|
|
|
|
|
static void locate_bitmap0(struct supertype *st, int fd)
|
|
{
|
|
unsigned long long dsize;
|
|
unsigned long long offset;
|
|
|
|
if (!get_dev_size(fd, NULL, &dsize))
|
|
return;
|
|
|
|
if (dsize < MD_RESERVED_SECTORS*512)
|
|
return;
|
|
|
|
offset = MD_NEW_SIZE_SECTORS(dsize>>9);
|
|
|
|
offset *= 512;
|
|
|
|
offset += MD_SB_BYTES;
|
|
|
|
lseek64(fd, offset, 0);
|
|
}
|
|
|
|
static int write_bitmap0(struct supertype *st, int fd)
|
|
{
|
|
unsigned long long dsize;
|
|
unsigned long long offset;
|
|
mdp_super_t *sb = st->sb;
|
|
|
|
int rv = 0;
|
|
|
|
int towrite, n;
|
|
void *buf;
|
|
|
|
if (!get_dev_size(fd, NULL, &dsize))
|
|
return 1;
|
|
|
|
if (dsize < MD_RESERVED_SECTORS*512)
|
|
return -1;
|
|
|
|
offset = MD_NEW_SIZE_SECTORS(dsize>>9);
|
|
|
|
offset *= 512;
|
|
|
|
if (lseek64(fd, offset + 4096, 0)< 0LL)
|
|
return 3;
|
|
|
|
if (posix_memalign(&buf, 4096, 4096))
|
|
return -ENOMEM;
|
|
|
|
memset(buf, 0xff, 4096);
|
|
memcpy(buf, ((char*)sb)+MD_SB_BYTES, sizeof(bitmap_super_t));
|
|
towrite = 60*1024;
|
|
while (towrite > 0) {
|
|
n = towrite;
|
|
if (n > 4096)
|
|
n = 4096;
|
|
n = write(fd, buf, n);
|
|
if (n > 0)
|
|
towrite -= n;
|
|
else
|
|
break;
|
|
memset(buf, 0xff, 4096);
|
|
}
|
|
fsync(fd);
|
|
if (towrite)
|
|
rv = -2;
|
|
|
|
free(buf);
|
|
return rv;
|
|
}
|
|
|
|
static void free_super0(struct supertype *st)
|
|
{
|
|
if (st->sb)
|
|
free(st->sb);
|
|
while (st->info) {
|
|
struct devinfo *di = st->info;
|
|
st->info = di->next;
|
|
if (di->fd >= 0)
|
|
close(di->fd);
|
|
free(di);
|
|
}
|
|
st->sb = NULL;
|
|
}
|
|
|
|
#ifndef MDASSEMBLE
|
|
static int validate_geometry0(struct supertype *st, int level,
|
|
int layout, int raiddisks,
|
|
int *chunk, unsigned long long size,
|
|
unsigned long long data_offset,
|
|
char *subdev, unsigned long long *freesize,
|
|
int verbose)
|
|
{
|
|
unsigned long long ldsize;
|
|
int fd;
|
|
unsigned int tbmax = 4;
|
|
|
|
/* prior to linux 3.1, a but limits usable device size to 2TB.
|
|
* It was introduced in 2.6.29, but we won't worry about that detail
|
|
*/
|
|
if (get_linux_version() < 3001000)
|
|
tbmax = 2;
|
|
|
|
if (level == LEVEL_CONTAINER) {
|
|
if (verbose)
|
|
pr_err("0.90 metadata does not support containers\n");
|
|
return 0;
|
|
}
|
|
if (raiddisks > MD_SB_DISKS) {
|
|
if (verbose)
|
|
pr_err("0.90 metadata supports at most %d devices per array\n",
|
|
MD_SB_DISKS);
|
|
return 0;
|
|
}
|
|
if (size >= tbmax * 2ULL*1024*1024*1024) {
|
|
if (verbose)
|
|
pr_err("0.90 metadata supports at most "
|
|
"%d terabytes per device\n", tbmax);
|
|
return 0;
|
|
}
|
|
if (chunk && *chunk == UnSet)
|
|
*chunk = DEFAULT_CHUNK;
|
|
|
|
if (!subdev)
|
|
return 1;
|
|
|
|
fd = open(subdev, O_RDONLY|O_EXCL, 0);
|
|
if (fd < 0) {
|
|
if (verbose)
|
|
pr_err("super0.90 cannot open %s: %s\n",
|
|
subdev, strerror(errno));
|
|
return 0;
|
|
}
|
|
|
|
if (!get_dev_size(fd, subdev, &ldsize)) {
|
|
close(fd);
|
|
return 0;
|
|
}
|
|
close(fd);
|
|
|
|
if (ldsize < MD_RESERVED_SECTORS * 512)
|
|
return 0;
|
|
*freesize = MD_NEW_SIZE_SECTORS(ldsize >> 9);
|
|
return 1;
|
|
}
|
|
#endif /* MDASSEMBLE */
|
|
|
|
struct superswitch super0 = {
|
|
#ifndef MDASSEMBLE
|
|
.examine_super = examine_super0,
|
|
.brief_examine_super = brief_examine_super0,
|
|
.export_examine_super = export_examine_super0,
|
|
.detail_super = detail_super0,
|
|
.brief_detail_super = brief_detail_super0,
|
|
.write_init_super = write_init_super0,
|
|
.validate_geometry = validate_geometry0,
|
|
.add_to_super = add_to_super0,
|
|
#endif
|
|
.match_home = match_home0,
|
|
.uuid_from_super = uuid_from_super0,
|
|
.getinfo_super = getinfo_super0,
|
|
.container_content = container_content0,
|
|
.update_super = update_super0,
|
|
.init_super = init_super0,
|
|
.store_super = store_super0,
|
|
.compare_super = compare_super0,
|
|
.load_super = load_super0,
|
|
.match_metadata_desc = match_metadata_desc0,
|
|
.avail_size = avail_size0,
|
|
.add_internal_bitmap = add_internal_bitmap0,
|
|
.locate_bitmap = locate_bitmap0,
|
|
.write_bitmap = write_bitmap0,
|
|
.free_super = free_super0,
|
|
.name = "0.90",
|
|
};
|