4f589ad0c5
Signed-off-by: Neil Brown <neilb@suse.de>
1166 lines
32 KiB
C
1166 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) 2001-2006 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@cse.unsw.edu.au>
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* Paper: Neil Brown
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* School of Computer Science and Engineering
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* The University of New South Wales
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* Sydney, 2052
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* Australia
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*/
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#include "mdadm.h"
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/*
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* The version-1 superblock :
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* All numeric fields are little-endian.
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*
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* total size: 256 bytes plus 2 per device.
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* 1K allows 384 devices.
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*/
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struct mdp_superblock_1 {
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/* constant array information - 128 bytes */
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__u32 magic; /* MD_SB_MAGIC: 0xa92b4efc - little endian */
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__u32 major_version; /* 1 */
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__u32 feature_map; /* 0 for now */
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__u32 pad0; /* always set to 0 when writing */
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__u8 set_uuid[16]; /* user-space generated. */
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char set_name[32]; /* set and interpreted by user-space */
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__u64 ctime; /* lo 40 bits are seconds, top 24 are microseconds or 0*/
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__u32 level; /* -4 (multipath), -1 (linear), 0,1,4,5 */
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__u32 layout; /* only for raid5 currently */
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__u64 size; /* used size of component devices, in 512byte sectors */
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__u32 chunksize; /* in 512byte sectors */
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__u32 raid_disks;
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__u32 bitmap_offset; /* sectors after start of superblock that bitmap starts
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* NOTE: signed, so bitmap can be before superblock
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* only meaningful of feature_map[0] is set.
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*/
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/* These are only valid with feature bit '4' */
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__u32 new_level; /* new level we are reshaping to */
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__u64 reshape_position; /* next address in array-space for reshape */
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__u32 delta_disks; /* change in number of raid_disks */
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__u32 new_layout; /* new layout */
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__u32 new_chunk; /* new chunk size (bytes) */
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__u8 pad1[128-124]; /* set to 0 when written */
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/* constant this-device information - 64 bytes */
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__u64 data_offset; /* sector start of data, often 0 */
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__u64 data_size; /* sectors in this device that can be used for data */
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__u64 super_offset; /* sector start of this superblock */
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__u64 recovery_offset;/* sectors before this offset (from data_offset) have been recovered */
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__u32 dev_number; /* permanent identifier of this device - not role in raid */
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__u32 cnt_corrected_read; /* number of read errors that were corrected by re-writing */
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__u8 device_uuid[16]; /* user-space setable, ignored by kernel */
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__u8 devflags; /* per-device flags. Only one defined...*/
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#define WriteMostly1 1 /* mask for writemostly flag in above */
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__u8 pad2[64-57]; /* set to 0 when writing */
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/* array state information - 64 bytes */
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__u64 utime; /* 40 bits second, 24 btes microseconds */
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__u64 events; /* incremented when superblock updated */
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__u64 resync_offset; /* data before this offset (from data_offset) known to be in sync */
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__u32 sb_csum; /* checksum upto devs[max_dev] */
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__u32 max_dev; /* size of devs[] array to consider */
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__u8 pad3[64-32]; /* set to 0 when writing */
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/* device state information. Indexed by dev_number.
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* 2 bytes per device
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* Note there are no per-device state flags. State information is rolled
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* into the 'roles' value. If a device is spare or faulty, then it doesn't
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* have a meaningful role.
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*/
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__u16 dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */
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};
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/* feature_map bits */
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#define MD_FEATURE_BITMAP_OFFSET 1
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#define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and
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* must be honoured
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*/
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#define MD_FEATURE_RESHAPE_ACTIVE 4
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#define MD_FEATURE_ALL (1|2|4)
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#ifndef offsetof
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#define offsetof(t,f) ((int)&(((t*)0)->f))
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#endif
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static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb)
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{
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unsigned int disk_csum, csum;
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unsigned long long newcsum;
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int size = sizeof(*sb) + __le32_to_cpu(sb->max_dev)*2;
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unsigned int *isuper = (unsigned int*)sb;
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int i;
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/* make sure I can count... */
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if (offsetof(struct mdp_superblock_1,data_offset) != 128 ||
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offsetof(struct mdp_superblock_1, utime) != 192 ||
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sizeof(struct mdp_superblock_1) != 256) {
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fprintf(stderr, "WARNING - superblock isn't sized correctly\n");
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}
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disk_csum = sb->sb_csum;
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sb->sb_csum = 0;
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newcsum = 0;
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for (i=0; size>=4; size -= 4 )
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newcsum += __le32_to_cpu(*isuper++);
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if (size == 2)
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newcsum += __le16_to_cpu(*(unsigned short*) isuper);
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csum = (newcsum & 0xffffffff) + (newcsum >> 32);
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sb->sb_csum = disk_csum;
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return csum;
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}
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#ifndef MDASSEMBLE
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static void examine_super1(void *sbv)
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{
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struct mdp_superblock_1 *sb = sbv;
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time_t atime;
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int d;
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int faulty;
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int i;
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char *c;
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printf(" Magic : %08x\n", __le32_to_cpu(sb->magic));
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printf(" Version : %02d\n", 1);
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printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb->feature_map));
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printf(" Array UUID : ");
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for (i=0; i<16; i++) {
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if ((i&3)==0 && i != 0) printf(":");
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printf("%02x", sb->set_uuid[i]);
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}
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printf("\n");
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printf(" Name : %.32s\n", sb->set_name);
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atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL;
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printf(" Creation Time : %.24s\n", ctime(&atime));
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c=map_num(pers, __le32_to_cpu(sb->level));
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printf(" Raid Level : %s\n", c?c:"-unknown-");
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printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks));
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printf("\n");
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printf(" Device Size : %llu%s\n", (unsigned long long)sb->data_size, human_size(sb->data_size<<9));
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if (__le32_to_cpu(sb->level) >= 0) {
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int ddsks=0;
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switch(__le32_to_cpu(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 / (sb->layout&255) / ((sb->layout>>8)&255);
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}
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if (ddsks)
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printf(" Array Size : %llu%s\n", ddsks*(unsigned long long)sb->size, human_size(ddsks*sb->size<<9));
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if (sb->size != sb->data_size)
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printf(" Used Size : %llu%s\n", (unsigned long long)sb->size, human_size(sb->size<<9));
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}
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if (sb->data_offset)
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printf(" Data Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->data_offset));
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if (sb->super_offset)
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printf(" Super Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->super_offset));
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if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)
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printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->recovery_offset));
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printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean");
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printf(" Device UUID : ");
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for (i=0; i<16; i++) {
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if ((i&3)==0 && i != 0) printf(":");
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printf("%02x", sb->device_uuid[i]);
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}
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printf("\n");
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printf("\n");
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if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
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printf("Internal Bitmap : %ld sectors from superblock\n",
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(long)__le32_to_cpu(sb->bitmap_offset));
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}
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if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) {
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printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb->reshape_position)/2,
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human_size(__le64_to_cpu(sb->reshape_position)<<9));
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if (__le32_to_cpu(sb->delta_disks)) {
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printf(" Delta Devices : %d", __le32_to_cpu(sb->delta_disks));
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if (__le32_to_cpu(sb->delta_disks))
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printf(" (%d->%d)\n",
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__le32_to_cpu(sb->raid_disks)-__le32_to_cpu(sb->delta_disks),
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__le32_to_cpu(sb->raid_disks));
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else
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printf(" (%d->%d)\n", __le32_to_cpu(sb->raid_disks),
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__le32_to_cpu(sb->raid_disks)+__le32_to_cpu(sb->delta_disks));
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}
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if (__le32_to_cpu(sb->new_level) != __le32_to_cpu(sb->level)) {
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c = map_num(pers, __le32_to_cpu(sb->new_level));
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printf(" New Level : %s\n", c?c:"-unknown-");
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}
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if (__le32_to_cpu(sb->new_layout) != __le32_to_cpu(sb->layout)) {
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if (__le32_to_cpu(sb->level) == 5) {
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c = map_num(r5layout, __le32_to_cpu(sb->new_layout));
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printf(" New Layout : %s\n", c?c:"-unknown-");
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}
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if (__le32_to_cpu(sb->level) == 10) {
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printf(" New Layout : near=%d, %s=%d\n",
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__le32_to_cpu(sb->new_layout)&255,
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(__le32_to_cpu(sb->new_layout)&0x10000)?"offset":"far",
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(__le32_to_cpu(sb->new_layout)>>8)&255);
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}
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}
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if (__le32_to_cpu(sb->new_chunk) != __le32_to_cpu(sb->chunksize))
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printf(" New Chunksize : %dK\n", __le32_to_cpu(sb->new_chunk)/2);
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printf("\n");
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}
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if (sb->devflags) {
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printf(" Flags :");
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if (sb->devflags & WriteMostly1)
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printf(" write-mostly");
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printf("\n");
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}
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atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL;
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printf(" Update Time : %.24s\n", ctime(&atime));
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if (calc_sb_1_csum(sb) == sb->sb_csum)
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printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum));
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else
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printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum),
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__le32_to_cpu(calc_sb_1_csum(sb)));
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printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events));
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printf("\n");
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if (__le32_to_cpu(sb->level) == 5) {
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c = map_num(r5layout, __le32_to_cpu(sb->layout));
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printf(" Layout : %s\n", c?c:"-unknown-");
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}
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if (__le32_to_cpu(sb->level) == 10) {
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int lo = __le32_to_cpu(sb->layout);
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printf(" Layout : near=%d, %s=%d\n",
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lo&255,
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(lo&0x10000)?"offset":"far",
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(lo>>8)&255);
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}
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switch(__le32_to_cpu(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", __le32_to_cpu(sb->chunksize)/2);
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break;
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case -1:
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printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize)/2);
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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(" Array State : ");
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for (d=0; d<__le32_to_cpu(sb->raid_disks); d++) {
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int cnt = 0;
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int me = 0;
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int i;
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for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
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int role = __le16_to_cpu(sb->dev_roles[i]);
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if (role == d) {
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if (i == __le32_to_cpu(sb->dev_number))
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me = 1;
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cnt++;
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}
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}
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if (cnt > 1) printf("?");
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else if (cnt == 1 && me) printf("U");
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else if (cnt == 1) printf("u");
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else printf ("_");
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}
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faulty = 0;
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for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
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int role = __le16_to_cpu(sb->dev_roles[i]);
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if (role == 0xFFFE)
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faulty++;
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}
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if (faulty) printf(" %d failed", faulty);
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printf("\n");
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}
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static void brief_examine_super1(void *sbv)
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{
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struct mdp_superblock_1 *sb = sbv;
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int i;
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char *c=map_num(pers, __le32_to_cpu(sb->level));
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printf("ARRAY /dev/?? level=%s metadata=1 num-devices=%d UUID=",
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c?c:"-unknown-", sb->raid_disks);
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for (i=0; i<16; i++) {
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printf("%02x", sb->set_uuid[i]);
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if ((i&3)==0 && i != 0) printf(":");
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}
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if (sb->set_name[0])
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printf(" name=%.32s", sb->set_name);
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printf("\n");
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}
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static void detail_super1(void *sbv)
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{
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struct mdp_superblock_1 *sb = sbv;
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int i;
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printf(" Name : %.32s\n", sb->set_name);
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printf(" UUID : ");
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for (i=0; i<16; i++) {
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if ((i&3)==0 && i != 0) printf(":");
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printf("%02x", sb->set_uuid[i]);
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}
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printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events));
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}
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static void brief_detail_super1(void *sbv)
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{
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struct mdp_superblock_1 *sb = sbv;
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int i;
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if (sb->set_name[0])
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printf(" name=%.32s", sb->set_name);
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printf(" UUID=");
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for (i=0; i<16; i++) {
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if ((i&3)==0 && i != 0) printf(":");
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printf("%02x", sb->set_uuid[i]);
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}
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}
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#endif
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static void uuid_from_super1(int uuid[4], void * sbv)
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{
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struct mdp_superblock_1 *super = sbv;
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char *cuuid = (char*)uuid;
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int i;
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for (i=0; i<16; i++)
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cuuid[i] = super->set_uuid[i];
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}
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static void getinfo_super1(struct mdinfo *info, void *sbv)
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{
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struct mdp_superblock_1 *sb = sbv;
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int working = 0;
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int i;
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int role;
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info->array.major_version = 1;
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info->array.minor_version = __le32_to_cpu(sb->feature_map);
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info->array.patch_version = 0;
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info->array.raid_disks = __le32_to_cpu(sb->raid_disks);
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info->array.level = __le32_to_cpu(sb->level);
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info->array.layout = __le32_to_cpu(sb->layout);
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info->array.md_minor = -1;
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info->array.ctime = __le64_to_cpu(sb->ctime);
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info->array.utime = __le64_to_cpu(sb->utime);
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info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512;
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info->data_offset = __le64_to_cpu(sb->data_offset);
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info->component_size = __le64_to_cpu(sb->size);
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info->disk.major = 0;
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info->disk.minor = 0;
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info->disk.number = __le32_to_cpu(sb->dev_number);
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if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) ||
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__le32_to_cpu(sb->max_dev) > 512)
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role = 0xfffe;
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else
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role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]);
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info->disk.raid_disk = -1;
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switch(role) {
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case 0xFFFF:
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info->disk.state = 2; /* spare: ACTIVE, not sync, not faulty */
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break;
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case 0xFFFE:
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info->disk.state = 1; /* faulty */
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break;
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default:
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info->disk.state = 6; /* active and in sync */
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info->disk.raid_disk = role;
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}
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info->events = __le64_to_cpu(sb->events);
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memcpy(info->uuid, sb->set_uuid, 16);
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strncpy(info->name, sb->set_name, 32);
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info->name[32] = 0;
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if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) {
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info->reshape_active = 1;
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info->reshape_progress = __le64_to_cpu(sb->reshape_position);
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info->new_level = __le32_to_cpu(sb->new_level);
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info->delta_disks = __le32_to_cpu(sb->delta_disks);
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info->new_layout = __le32_to_cpu(sb->new_layout);
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info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9;
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} else
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info->reshape_active = 0;
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for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
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role = __le16_to_cpu(sb->dev_roles[i]);
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if (/*role == 0xFFFF || */role < info->array.raid_disks)
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working++;
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}
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info->array.working_disks = working;
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}
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static int update_super1(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose)
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{
|
|
/* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made.
|
|
* For others, the return value is ignored.
|
|
*/
|
|
int rv = 0;
|
|
struct mdp_superblock_1 *sb = sbv;
|
|
|
|
if (strcmp(update, "force")==0) {
|
|
if (sb->events != __cpu_to_le64(info->events))
|
|
rv = 1;
|
|
sb->events = __cpu_to_le64(info->events);
|
|
switch(__le32_to_cpu(sb->level)) {
|
|
case 5: case 4: case 6:
|
|
/* need to force clean */
|
|
if (sb->resync_offset != ~0ULL)
|
|
rv = 1;
|
|
sb->resync_offset = ~0ULL;
|
|
}
|
|
}
|
|
if (strcmp(update, "assemble")==0) {
|
|
int d = info->disk.number;
|
|
int want;
|
|
if (info->disk.state == 6)
|
|
want = __cpu_to_le32(info->disk.raid_disk);
|
|
else
|
|
want = 0xFFFF;
|
|
if (sb->dev_roles[d] != want) {
|
|
sb->dev_roles[d] = want;
|
|
rv = 1;
|
|
}
|
|
}
|
|
#if 0
|
|
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];
|
|
}
|
|
#endif
|
|
if (strcmp(update, "grow") == 0) {
|
|
sb->raid_disks = __cpu_to_le32(info->array.raid_disks);
|
|
/* FIXME */
|
|
}
|
|
if (strcmp(update, "resync") == 0) {
|
|
/* make sure resync happens */
|
|
sb->resync_offset = ~0ULL;
|
|
}
|
|
if (strcmp(update, "uuid") == 0) {
|
|
memcpy(sb->set_uuid, info->uuid, 16);
|
|
if (__le32_to_cpu(sb->feature_map)&MD_FEATURE_BITMAP_OFFSET) {
|
|
struct bitmap_super_s *bm;
|
|
bm = (struct bitmap_super_s*)(sbv+1024);
|
|
memcpy(bm->uuid, info->uuid, 16);
|
|
}
|
|
}
|
|
if (strcmp(update, "_reshape_progress")==0)
|
|
sb->reshape_position = __cpu_to_le64(info->reshape_progress);
|
|
|
|
sb->sb_csum = calc_sb_1_csum(sb);
|
|
return rv;
|
|
}
|
|
|
|
|
|
static __u64 event_super1(void *sbv)
|
|
{
|
|
struct mdp_superblock_1 *sb = sbv;
|
|
return __le64_to_cpu(sb->events);
|
|
}
|
|
|
|
static int init_super1(struct supertype *st, void **sbp, mdu_array_info_t *info, unsigned long long size, char *name)
|
|
{
|
|
struct mdp_superblock_1 *sb = malloc(1024 + sizeof(bitmap_super_t));
|
|
int spares;
|
|
int rfd;
|
|
memset(sb, 0, 1024);
|
|
|
|
if (info->major_version == -1)
|
|
/* zeroing superblock */
|
|
return 0;
|
|
|
|
spares = info->working_disks - info->active_disks;
|
|
if (info->raid_disks + spares > 384) {
|
|
fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n",
|
|
info->raid_disks , spares, 384);
|
|
return 0;
|
|
}
|
|
|
|
|
|
sb->magic = __cpu_to_le32(MD_SB_MAGIC);
|
|
sb->major_version = __cpu_to_le32(1);
|
|
sb->feature_map = 0;
|
|
sb->pad0 = 0;
|
|
|
|
if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
|
|
read(rfd, sb->set_uuid, 16) != 16) {
|
|
*(__u32*)(sb->set_uuid) = random();
|
|
*(__u32*)(sb->set_uuid+4) = random();
|
|
*(__u32*)(sb->set_uuid+8) = random();
|
|
*(__u32*)(sb->set_uuid+12) = random();
|
|
}
|
|
if (rfd >= 0) close(rfd);
|
|
|
|
memset(sb->set_name, 0, 32);
|
|
strcpy(sb->set_name, name);
|
|
|
|
sb->ctime = __cpu_to_le64((unsigned long long)time(0));
|
|
sb->level = __cpu_to_le32(info->level);
|
|
sb->layout = __cpu_to_le32(info->layout);
|
|
sb->size = __cpu_to_le64(size*2ULL);
|
|
sb->chunksize = __cpu_to_le32(info->chunk_size>>9);
|
|
sb->raid_disks = __cpu_to_le32(info->raid_disks);
|
|
|
|
sb->data_offset = __cpu_to_le64(0);
|
|
sb->data_size = __cpu_to_le64(0);
|
|
sb->super_offset = __cpu_to_le64(0);
|
|
sb->recovery_offset = __cpu_to_le64(0);
|
|
|
|
sb->utime = sb->ctime;
|
|
sb->events = __cpu_to_le64(1);
|
|
if (info->state & (1<<MD_SB_CLEAN))
|
|
sb->resync_offset = ~0ULL;
|
|
else
|
|
sb->resync_offset = 0;
|
|
sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/
|
|
sizeof(sb->dev_roles[0]));
|
|
memset(sb->pad3, 0, sizeof(sb->pad3));
|
|
|
|
memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1));
|
|
|
|
*sbp = sb;
|
|
return 1;
|
|
}
|
|
|
|
/* Add a device to the superblock being created */
|
|
static void add_to_super1(void *sbv, mdu_disk_info_t *dk)
|
|
{
|
|
struct mdp_superblock_1 *sb = sbv;
|
|
__u16 *rp = sb->dev_roles + dk->number;
|
|
if ((dk->state & 6) == 6) /* active, sync */
|
|
*rp = __cpu_to_le16(dk->raid_disk);
|
|
else if ((dk->state & ~2) == 0) /* active or idle -> spare */
|
|
*rp = 0xffff;
|
|
else
|
|
*rp = 0xfffe;
|
|
}
|
|
|
|
static void locate_bitmap1(struct supertype *st, int fd, void *sbv);
|
|
|
|
static int store_super1(struct supertype *st, int fd, void *sbv)
|
|
{
|
|
struct mdp_superblock_1 *sb = sbv;
|
|
unsigned long long sb_offset;
|
|
int sbsize;
|
|
unsigned long size;
|
|
unsigned long long dsize;
|
|
|
|
#ifdef BLKGETSIZE64
|
|
if (ioctl(fd, BLKGETSIZE64, &dsize) != 0)
|
|
#endif
|
|
{
|
|
if (ioctl(fd, BLKGETSIZE, &size))
|
|
return 1;
|
|
else
|
|
dsize = (unsigned long long)size;
|
|
} else
|
|
dsize >>= 9;
|
|
|
|
if (dsize < 24)
|
|
return 2;
|
|
|
|
/*
|
|
* Calculate the position of the superblock.
|
|
* It is always aligned to a 4K boundary and
|
|
* depending on minor_version, it can be:
|
|
* 0: At least 8K, but less than 12K, from end of device
|
|
* 1: At start of device
|
|
* 2: 4K from start of device.
|
|
*/
|
|
switch(st->minor_version) {
|
|
case 0:
|
|
sb_offset = dsize;
|
|
sb_offset -= 8*2;
|
|
sb_offset &= ~(4*2-1);
|
|
break;
|
|
case 1:
|
|
sb_offset = 0;
|
|
break;
|
|
case 2:
|
|
sb_offset = 4*2;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
|
|
|
|
if (sb_offset != __le64_to_cpu(sb->super_offset) &&
|
|
0 != __le64_to_cpu(sb->super_offset)
|
|
) {
|
|
fprintf(stderr, Name ": internal error - sb_offset is wrong\n");
|
|
abort();
|
|
}
|
|
|
|
if (lseek64(fd, sb_offset << 9, 0)< 0LL)
|
|
return 3;
|
|
|
|
sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev);
|
|
|
|
if (write(fd, sb, sbsize) != sbsize)
|
|
return 4;
|
|
|
|
if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
|
|
struct bitmap_super_s *bm = (struct bitmap_super_s*)
|
|
((char*)sb)+1024;
|
|
if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) {
|
|
locate_bitmap1(st, fd, sbv);
|
|
write(fd, bm, sizeof(*bm));
|
|
}
|
|
}
|
|
fsync(fd);
|
|
return 0;
|
|
}
|
|
|
|
static int load_super1(struct supertype *st, int fd, void **sbp, char *devname);
|
|
|
|
static int write_init_super1(struct supertype *st, void *sbv,
|
|
mdu_disk_info_t *dinfo, char *devname)
|
|
{
|
|
struct mdp_superblock_1 *sb = sbv;
|
|
void *refsbv = NULL;
|
|
int fd = open(devname, O_RDWR | O_EXCL);
|
|
int rfd;
|
|
int rv;
|
|
|
|
unsigned long size, space;
|
|
unsigned long long dsize, array_size;
|
|
long long sb_offset;
|
|
|
|
|
|
if (fd < 0) {
|
|
fprintf(stderr, Name ": Failed to open %s to write superblock\n",
|
|
devname);
|
|
return -1;
|
|
}
|
|
|
|
sb->dev_number = __cpu_to_le32(dinfo->number);
|
|
if (dinfo->state & (1<<MD_DISK_WRITEMOSTLY))
|
|
sb->devflags |= WriteMostly1;
|
|
|
|
if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
|
|
read(rfd, sb->device_uuid, 16) != 16) {
|
|
*(__u32*)(sb->device_uuid) = random();
|
|
*(__u32*)(sb->device_uuid+4) = random();
|
|
*(__u32*)(sb->device_uuid+8) = random();
|
|
*(__u32*)(sb->device_uuid+12) = random();
|
|
}
|
|
if (rfd >= 0) close(rfd);
|
|
sb->events = 0;
|
|
|
|
if (load_super1(st, fd, &refsbv, NULL)==0) {
|
|
struct mdp_superblock_1 *refsb = refsbv;
|
|
|
|
memcpy(sb->device_uuid, refsb->device_uuid, 16);
|
|
if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) {
|
|
/* same array, so preserve events and dev_number */
|
|
sb->events = refsb->events;
|
|
sb->dev_number = refsb->dev_number;
|
|
}
|
|
free(refsb);
|
|
}
|
|
|
|
#ifdef BLKGETSIZE64
|
|
if (ioctl(fd, BLKGETSIZE64, &dsize) != 0)
|
|
#endif
|
|
{
|
|
if (ioctl(fd, BLKGETSIZE, &size))
|
|
return 1;
|
|
else
|
|
dsize = size;
|
|
} else
|
|
dsize >>= 9;
|
|
|
|
if (dsize < 24) {
|
|
close(fd);
|
|
return 2;
|
|
}
|
|
|
|
|
|
/*
|
|
* Calculate the position of the superblock.
|
|
* It is always aligned to a 4K boundary and
|
|
* depending on minor_version, it can be:
|
|
* 0: At least 8K, but less than 12K, from end of device
|
|
* 1: At start of device
|
|
* 2: 4K from start of device.
|
|
* Depending on the array size, we might leave extra space
|
|
* for a bitmap.
|
|
*/
|
|
array_size = __le64_to_cpu(sb->size);
|
|
switch(st->minor_version) {
|
|
case 0:
|
|
sb_offset = dsize;
|
|
sb_offset -= 8*2;
|
|
sb_offset &= ~(4*2-1);
|
|
sb->super_offset = __cpu_to_le64(sb_offset);
|
|
sb->data_offset = __cpu_to_le64(0);
|
|
if (sb_offset-64*2 >= array_size && array_size > 8*1024*1024*2)
|
|
sb->data_size = __cpu_to_le64(sb_offset-64*2);
|
|
else
|
|
sb->data_size = __cpu_to_le64(sb_offset);
|
|
break;
|
|
case 1:
|
|
sb->super_offset = __cpu_to_le64(0);
|
|
if (dsize - 64*2 >= array_size && array_size > 8*1024*1024*2)
|
|
space = 64*2;
|
|
else
|
|
space = 4*2;
|
|
sb->data_offset = __cpu_to_le64(space); /* leave space for super and bitmap */
|
|
sb->data_size = __cpu_to_le64(dsize - space);
|
|
break;
|
|
case 2:
|
|
sb_offset = 4*2;
|
|
if (dsize - 4*2 - 64*2 >= array_size && array_size > 8*1024*1024*2)
|
|
space = 64*2;
|
|
else
|
|
space = 4*2;
|
|
sb->super_offset = __cpu_to_le64(sb_offset);
|
|
sb->data_offset = __cpu_to_le64(sb_offset+space);
|
|
sb->data_size = __cpu_to_le64(dsize - 4*2 - space);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
|
|
sb->sb_csum = calc_sb_1_csum(sb);
|
|
rv = store_super1(st, fd, sb);
|
|
if (rv)
|
|
fprintf(stderr, Name ": failed to write superblock to %s\n", devname);
|
|
|
|
if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1))
|
|
rv = st->ss->write_bitmap(st, fd, sbv);
|
|
close(fd);
|
|
return rv;
|
|
}
|
|
|
|
static int compare_super1(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
|
|
*/
|
|
struct mdp_superblock_1 *first = *firstp;
|
|
struct mdp_superblock_1 *second = secondv;
|
|
|
|
if (second->magic != __cpu_to_le32(MD_SB_MAGIC))
|
|
return 1;
|
|
if (second->major_version != __cpu_to_le32(1))
|
|
return 1;
|
|
|
|
if (!first) {
|
|
first = malloc(1024+sizeof(bitmap_super_t));
|
|
memcpy(first, second, 1024+sizeof(bitmap_super_t));
|
|
*firstp = first;
|
|
return 0;
|
|
}
|
|
if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0)
|
|
return 2;
|
|
|
|
if (first->ctime != second->ctime ||
|
|
first->level != second->level ||
|
|
first->layout != second->layout ||
|
|
first->size != second->size ||
|
|
first->chunksize != second->chunksize ||
|
|
first->raid_disks != second->raid_disks)
|
|
return 3;
|
|
return 0;
|
|
}
|
|
|
|
static int load_super1(struct supertype *st, int fd, void **sbp, char *devname)
|
|
{
|
|
unsigned long size;
|
|
unsigned long long dsize;
|
|
unsigned long long sb_offset;
|
|
struct mdp_superblock_1 *super;
|
|
int uuid[4];
|
|
struct bitmap_super_s *bsb;
|
|
|
|
|
|
if (st->ss == NULL) {
|
|
int bestvers = -1;
|
|
__u64 bestctime = 0;
|
|
/* guess... choose latest ctime */
|
|
st->ss = &super1;
|
|
for (st->minor_version = 0; st->minor_version <= 2 ; st->minor_version++) {
|
|
switch(load_super1(st, fd, sbp, devname)) {
|
|
case 0: super = *sbp;
|
|
if (bestvers == -1 ||
|
|
bestctime < __le64_to_cpu(super->ctime)) {
|
|
bestvers = st->minor_version;
|
|
bestctime = __le64_to_cpu(super->ctime);
|
|
}
|
|
free(super);
|
|
*sbp = NULL;
|
|
break;
|
|
case 1: st->ss = NULL; return 1; /*bad device */
|
|
case 2: break; /* bad, try next */
|
|
}
|
|
}
|
|
if (bestvers != -1) {
|
|
int rv;
|
|
st->minor_version = bestvers;
|
|
st->ss = &super1;
|
|
st->max_devs = 384;
|
|
rv = load_super1(st, fd, sbp, devname);
|
|
if (rv) st->ss = NULL;
|
|
return rv;
|
|
}
|
|
st->ss = NULL;
|
|
return 2;
|
|
}
|
|
#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;
|
|
}
|
|
dsize = size;
|
|
} else
|
|
dsize >>= 9;
|
|
|
|
if (dsize < 24) {
|
|
if (devname)
|
|
fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n",
|
|
devname, dsize);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Calculate the position of the superblock.
|
|
* It is always aligned to a 4K boundary and
|
|
* depending on minor_version, it can be:
|
|
* 0: At least 8K, but less than 12K, from end of device
|
|
* 1: At start of device
|
|
* 2: 4K from start of device.
|
|
*/
|
|
switch(st->minor_version) {
|
|
case 0:
|
|
sb_offset = dsize;
|
|
sb_offset -= 8*2;
|
|
sb_offset &= ~(4*2-1);
|
|
break;
|
|
case 1:
|
|
sb_offset = 0;
|
|
break;
|
|
case 2:
|
|
sb_offset = 4*2;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */
|
|
|
|
|
|
if (lseek64(fd, sb_offset << 9, 0)< 0LL) {
|
|
if (devname)
|
|
fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n",
|
|
devname, strerror(errno));
|
|
return 1;
|
|
}
|
|
|
|
super = malloc(1024 + sizeof(bitmap_super_t));
|
|
|
|
if (read(fd, super, 1024) != 1024) {
|
|
if (devname)
|
|
fprintf(stderr, Name ": Cannot read superblock on %s\n",
|
|
devname);
|
|
free(super);
|
|
return 1;
|
|
}
|
|
|
|
if (__le32_to_cpu(super->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, __le32_to_cpu(super->magic));
|
|
free(super);
|
|
return 2;
|
|
}
|
|
|
|
if (__le32_to_cpu(super->major_version) != 1) {
|
|
if (devname)
|
|
fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n",
|
|
devname, __le32_to_cpu(super->major_version));
|
|
free(super);
|
|
return 2;
|
|
}
|
|
if (__le64_to_cpu(super->super_offset) != sb_offset) {
|
|
if (devname)
|
|
fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n",
|
|
devname);
|
|
free(super);
|
|
return 2;
|
|
}
|
|
*sbp = super;
|
|
|
|
/* Now check on the bitmap superblock */
|
|
if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 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.
|
|
*/
|
|
locate_bitmap1(st, fd, super);
|
|
if (read(fd, ((char*)super)+1024, sizeof(struct bitmap_super_s))
|
|
!= sizeof(struct bitmap_super_s))
|
|
goto no_bitmap;
|
|
|
|
uuid_from_super1(uuid, super);
|
|
bsb = (struct bitmap_super_s *)(((char*)super)+1024);
|
|
if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC ||
|
|
memcmp(bsb->uuid, uuid, 16) != 0)
|
|
goto no_bitmap;
|
|
return 0;
|
|
|
|
no_bitmap:
|
|
super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map) & ~1);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct supertype *match_metadata_desc1(char *arg)
|
|
{
|
|
struct supertype *st = malloc(sizeof(*st));
|
|
if (!st) return st;
|
|
|
|
st->ss = &super1;
|
|
st->max_devs = 384;
|
|
if (strcmp(arg, "1") == 0 ||
|
|
strcmp(arg, "1.0") == 0 ||
|
|
strcmp(arg, "default/large") == 0) {
|
|
st->minor_version = 0;
|
|
return st;
|
|
}
|
|
if (strcmp(arg, "1.1") == 0) {
|
|
st->minor_version = 1;
|
|
return st;
|
|
}
|
|
if (strcmp(arg, "1.2") == 0) {
|
|
st->minor_version = 2;
|
|
return st;
|
|
}
|
|
|
|
free(st);
|
|
return NULL;
|
|
}
|
|
|
|
/* find available size on device with this devsize, using
|
|
* superblock type st, and reserving 'reserve' sectors for
|
|
* a possible bitmap
|
|
*/
|
|
static __u64 avail_size1(struct supertype *st, __u64 devsize)
|
|
{
|
|
if (devsize < 24)
|
|
return 0;
|
|
|
|
/* if the device is bigger than 8Gig, save 64k for bitmap usage,
|
|
* if biffer than 200Gig, save 128k
|
|
*/
|
|
if (devsize > 200*1024*1024*2)
|
|
devsize -= 128*2;
|
|
else if (devsize > 8*1024*1024*2)
|
|
devsize -= 64*2;
|
|
|
|
switch(st->minor_version) {
|
|
case 0:
|
|
/* at end */
|
|
return ((devsize - 8*2 ) & ~(4*2-1));
|
|
case 1:
|
|
/* at start, 4K for superblock and possible bitmap */
|
|
return devsize - 4*2;
|
|
case 2:
|
|
/* 4k from start, 4K for superblock and possible bitmap */
|
|
return devsize - (4+4)*2;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
add_internal_bitmap1(struct supertype *st, void *sbv,
|
|
int chunk, int delay, int write_behind, unsigned long long size,
|
|
int may_change, int major)
|
|
{
|
|
/*
|
|
* If not may_change, then this is a 'Grow', and the bitmap
|
|
* must fit after the superblock.
|
|
* If may_change, then this is create, and we can put the bitmap
|
|
* before the superblock if we like, or may move the start.
|
|
* For now, just squeeze the bitmap into 3k and don't change anything.
|
|
*
|
|
* size is in sectors, chunk is in bytes !!!
|
|
*/
|
|
|
|
unsigned long long bits;
|
|
unsigned long long max_bits = (3*512 - sizeof(bitmap_super_t)) * 8;
|
|
unsigned long long min_chunk;
|
|
struct mdp_superblock_1 *sb = sbv;
|
|
bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024);
|
|
|
|
if (st->minor_version && !may_change &&
|
|
__le64_to_cpu(sb->data_offset) - __le64_to_cpu(sb->super_offset) < 8)
|
|
return 0; /* doesn't fit */
|
|
|
|
|
|
|
|
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)
|
|
chunk = min_chunk;
|
|
else if (chunk < min_chunk)
|
|
return 0; /* chunk size too small */
|
|
if (chunk == 0) /* rounding problem */
|
|
return 0;
|
|
|
|
sb->bitmap_offset = __cpu_to_le32(2);
|
|
|
|
sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | 1);
|
|
memset(bms, 0, sizeof(*bms));
|
|
bms->magic = __cpu_to_le32(BITMAP_MAGIC);
|
|
bms->version = __cpu_to_le32(major);
|
|
uuid_from_super1((int*)bms->uuid, sb);
|
|
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);
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
static void locate_bitmap1(struct supertype *st, int fd, void *sbv)
|
|
{
|
|
unsigned long long offset;
|
|
struct mdp_superblock_1 *sb;
|
|
int mustfree = 0;
|
|
|
|
if (!sbv) {
|
|
if (st->ss->load_super(st, fd, &sbv, NULL))
|
|
return; /* no error I hope... */
|
|
mustfree = 1;
|
|
}
|
|
sb = sbv;
|
|
|
|
offset = __le64_to_cpu(sb->super_offset);
|
|
offset += (long) __le32_to_cpu(sb->bitmap_offset);
|
|
if (mustfree)
|
|
free(sb);
|
|
lseek64(fd, offset<<9, 0);
|
|
}
|
|
|
|
static int write_bitmap1(struct supertype *st, int fd, void *sbv)
|
|
{
|
|
struct mdp_superblock_1 *sb = sbv;
|
|
bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+1024);
|
|
int rv = 0;
|
|
|
|
int towrite, n;
|
|
char buf[4096];
|
|
|
|
locate_bitmap1(st, fd, sbv);
|
|
|
|
if (write(fd, ((char*)sb)+1024, sizeof(bitmap_super_t)) !=
|
|
sizeof(bitmap_super_t))
|
|
return -2;
|
|
towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9);
|
|
towrite = (towrite+7) >> 3; /* bits to bytes */
|
|
memset(buf, 0xff, sizeof(buf));
|
|
while (towrite > 0) {
|
|
n = towrite;
|
|
if (n > sizeof(buf))
|
|
n = sizeof(buf);
|
|
n = write(fd, buf, n);
|
|
if (n > 0)
|
|
towrite -= n;
|
|
else
|
|
break;
|
|
}
|
|
fsync(fd);
|
|
if (towrite)
|
|
rv = -2;
|
|
|
|
return rv;
|
|
}
|
|
|
|
struct superswitch super1 = {
|
|
#ifndef MDASSEMBLE
|
|
.examine_super = examine_super1,
|
|
.brief_examine_super = brief_examine_super1,
|
|
.detail_super = detail_super1,
|
|
.brief_detail_super = brief_detail_super1,
|
|
#endif
|
|
.uuid_from_super = uuid_from_super1,
|
|
.getinfo_super = getinfo_super1,
|
|
.update_super = update_super1,
|
|
.event_super = event_super1,
|
|
.init_super = init_super1,
|
|
.add_to_super = add_to_super1,
|
|
.store_super = store_super1,
|
|
.write_init_super = write_init_super1,
|
|
.compare_super = compare_super1,
|
|
.load_super = load_super1,
|
|
.match_metadata_desc = match_metadata_desc1,
|
|
.avail_size = avail_size1,
|
|
.add_internal_bitmap = add_internal_bitmap1,
|
|
.locate_bitmap = locate_bitmap1,
|
|
.write_bitmap = write_bitmap1,
|
|
.major = 1,
|
|
#if __BYTE_ORDER == BIG_ENDIAN
|
|
.swapuuid = 0,
|
|
#else
|
|
.swapuuid = 1,
|
|
#endif
|
|
};
|