169 lines
5.1 KiB
C
169 lines
5.1 KiB
C
/*
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* mdctl - manage Linux "md" devices aka RAID arrays.
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*
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* Copyright (C) 2001 Neil Brown <neilb@cse.unsw.edu.au>
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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 "mdctl.h"
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#if ! defined(__BIG_ENDIAN) && ! defined(__LITTLE_ENDIAN)
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#error no endian defined
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#endif
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#include "md_u.h"
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#include "md_p.h"
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int Examine(char *dev)
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{
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/* Read the raid superblock from a device and
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* display important content.
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*
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* If cannot be found, print reason: too small, bad magic
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*
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* Print:
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* version, ctime, level, size, raid+spare+
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* prefered minor
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* uuid
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*
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* utime, state etc
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*
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*/
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int fd = open(dev, O_RDONLY);
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time_t atime;
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mdp_super_t super;
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int d;
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char *c;
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int rv;
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if (fd < 0) {
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fprintf(stderr,Name ": cannot open %s: %s\n",
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dev, strerror(errno));
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return 1;
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}
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rv = load_super(fd, &super);
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close(fd);
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switch(rv) {
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case 1:
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fprintf(stderr, Name ": cannot find device size for %s: %s\n",
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dev, strerror(errno));
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return 1;
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case 2:
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/* fprintf(stderr, Name ": %s is too small for md: size is %ld sectors\n",
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dev, size);
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*/
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fprintf(stderr, Name ": %s is too small for md\n",
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dev);
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return 1;
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case 3:
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fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n",
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dev, strerror(errno));
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return 1;
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case 4:
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fprintf(stderr, Name ": Cannot read superblock on %s\n",
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dev);
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return 1;
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case 5:
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fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n",
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dev, MD_SB_MAGIC, super.md_magic);
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return 1;
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case 6:
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fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n",
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dev, super.major_version);
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return 1;
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}
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/* Ok, its good enough to try, though the checksum could be wrong */
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printf("%s:\n",dev);
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printf(" Magic : %08x\n", super.md_magic);
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printf(" Version : %02d.%02d.%02d\n", super.major_version, super.minor_version,
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super.patch_version);
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if (super.minor_version >= 90)
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printf(" UUID : %08x:%08x:%08x:%08x\n", super.set_uuid0, super.set_uuid1,
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super.set_uuid2, super.set_uuid3);
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else
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printf(" UUID : %08x\n", super.set_uuid0);
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atime = super.ctime;
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printf(" Creation Time : %.24s\n", ctime(&atime));
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c=map_num(pers, super.level);
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printf(" Raid Level : %s\n", c?c:"-unknown-");
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printf(" Size : %d\n", super.size);
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printf(" Raid Disks : %d\n", super.raid_disks);
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printf(" Total Disks : %d\n", super.nr_disks);
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printf("Preferred Minor : %d\n", super.md_minor);
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printf("\n");
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atime = super.utime;
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printf(" Update Time : %.24s\n", ctime(&atime));
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printf(" State : %s, %serrors\n",
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(super.state&(1<<MD_SB_CLEAN))?"clean":"dirty",
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(super.state&(1<<MD_SB_ERRORS))?"":"no-");
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printf(" Active Drives : %d\n", super.active_disks);
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printf(" Working Drives : %d\n", super.working_disks);
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printf(" Failed Drives : %d\n", super.failed_disks);
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printf(" Spare Drives : %d\n", super.spare_disks);
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if (calc_sb_csum(&super) == super.sb_csum)
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printf(" Checksum : %x - correct\n", super.sb_csum);
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else
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printf(" Checksum : %x - expected %x\n", super.sb_csum, calc_sb_csum(&super));
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printf(" Events : %d.%d\n", super.events_hi, super.events_lo);
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printf("\n");
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if (super.level == 5) {
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c = map_num(r5layout, super.layout);
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printf(" Layout : %s\n", c?c:"-unknown-");
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}
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switch(super.level) {
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case 0:
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case 4:
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case 5:
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printf(" Chunk Size : %dK\n", super.chunk_size/1024);
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break;
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case -1:
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printf(" Rounding : %dK\n", super.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 RaidDisk State\n");
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for (d= -1; d<(signed int)super.nr_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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if (d>=0) dp = &super.disks[d];
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else dp = &super.this_disk;
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sprintf(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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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 ((dv=map_dev(dp->major, dp->minor)))
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printf(" %s", dv);
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printf("\n");
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}
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return 0;
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}
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