0df46c2ad8
This allows for larger device number if glibc supports it (requires 2.3.3). Also fail before creating larger device number if glibc support isn't present. Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
295 lines
8.6 KiB
C
295 lines
8.6 KiB
C
/*
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* mdadm - manage Linux "md" devices aka RAID arrays.
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*
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* Copyright (C) 2001-2002 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 "mdadm.h"
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#include "md_p.h"
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#include "md_u.h"
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int Detail(char *dev, int brief, int test)
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{
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/*
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* Print out details for an md array by using
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* GET_ARRAY_INFO and GET_DISK_INFO ioctl calls
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*/
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int fd = open(dev, O_RDONLY, 0);
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int vers;
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mdu_array_info_t array;
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int d;
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time_t atime;
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char *c;
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char *devices = NULL;
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int spares = 0;
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struct stat stb;
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int is_26 = get_linux_version() >= 2006000;
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int is_rebuilding = 0;
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int failed = 0;
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mdp_super_t super;
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int have_super = 0;
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int rv = test ? 4 : 1;
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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 rv;
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}
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vers = md_get_version(fd);
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if (vers < 0) {
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fprintf(stderr, Name ": %s does not appear to be an md device\n",
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dev);
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close(fd);
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return rv;
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}
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if (vers < 9000) {
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fprintf(stderr, Name ": cannot get detail for md device %s: driver version too old.\n",
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dev);
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close(fd);
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return rv;
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}
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if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
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if (errno == ENODEV)
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fprintf(stderr, Name ": md device %s does not appear to be active.\n",
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dev);
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else
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fprintf(stderr, Name ": cannot get array detail for %s: %s\n",
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dev, strerror(errno));
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close(fd);
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return rv;
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}
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if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
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stb.st_rdev = 0;
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rv = 0;
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/* try to load a superblock */
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for (d= 0; d<MD_SB_DISKS; d++) {
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mdu_disk_info_t disk;
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char *dv;
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disk.number = d;
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if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
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continue;
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if (d >= array.raid_disks &&
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disk.major == 0 &&
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disk.minor == 0)
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continue;
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if ((dv=map_dev(disk.major, disk.minor))) {
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if (!have_super && (disk.state & (1<<MD_DISK_ACTIVE))) {
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/* try to read the superblock from this device
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* to get more info
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*/
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int fd2 = open(dv, O_RDONLY);
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if (fd2 >=0 &&
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load_super(fd2, &super) ==0 &&
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(unsigned long)super.ctime == (unsigned long)array.ctime &&
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(unsigned int)super.level == (unsigned int)array.level)
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have_super = 1;
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if (fd2 >= 0) close(fd2);
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}
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}
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}
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/* Ok, we have some info to print... */
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c = map_num(pers, array.level);
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if (brief)
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printf("ARRAY %s level=%s num-devices=%d", dev, c?c:"-unknown-",array.raid_disks );
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else {
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unsigned long array_size;
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unsigned long long larray_size;
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struct mdstat_ent *ms = mdstat_read(0);
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struct mdstat_ent *e;
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int devnum = array.md_minor;
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if (major(stb.st_rdev) != MD_MAJOR)
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devnum = -1 - devnum;
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for (e=ms; e; e=e->next)
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if (e->devnum == devnum)
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break;
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#ifdef BLKGETSIZE64
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if (ioctl(fd, BLKGETSIZE64, &larray_size)==0)
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;
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else
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#endif
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if (ioctl(fd, BLKGETSIZE, &array_size)==0) {
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larray_size = array_size;
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larray_size <<= 9;
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}
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else larray_size = 0;
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printf("%s:\n", dev);
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printf(" Version : %02d.%02d.%02d\n",
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array.major_version, array.minor_version, array.patch_version);
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atime = array.ctime;
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printf(" Creation Time : %.24s\n", ctime(&atime));
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printf(" Raid Level : %s\n", c?c:"-unknown-");
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if (larray_size)
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printf(" Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
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if (array.level >= 1)
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printf(" Device Size : %d%s\n", array.size, human_size((long long)array.size<<10));
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printf(" Raid Devices : %d\n", array.raid_disks);
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printf(" Total Devices : %d\n", array.nr_disks);
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printf("Preferred Minor : %d\n", array.md_minor);
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printf(" Persistence : Superblock is %spersistent\n",
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array.not_persistent?"not ":"");
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printf("\n");
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atime = array.utime;
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printf(" Update Time : %.24s\n", ctime(&atime));
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printf(" State : %s%s%s\n",
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(array.state&(1<<MD_SB_CLEAN))?"clean":"active",
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array.active_disks < array.raid_disks? ", degraded":"",
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(!e || e->percent < 0) ? "" :
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(e->resync) ? ", resyncing": ", recovering");
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printf(" Active Devices : %d\n", array.active_disks);
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printf("Working Devices : %d\n", array.working_disks);
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printf(" Failed Devices : %d\n", array.failed_disks);
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printf(" Spare Devices : %d\n", array.spare_disks);
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printf("\n");
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if (array.level == 5) {
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c = map_num(r5layout, array.layout);
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printf(" Layout : %s\n", c?c:"-unknown-");
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}
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if (array.level == 10) {
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printf(" Layout : near=%d, far=%d\n",
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array.layout&255, (array.layout>>8)&255);
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}
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switch (array.level) {
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case 0:
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case 4:
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case 5:
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case 10:
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case 6:
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printf(" Chunk Size : %dK\n\n", array.chunk_size/1024);
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break;
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case -1:
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printf(" Rounding : %dK\n\n", array.chunk_size/1024);
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break;
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default: break;
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}
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if (e && e->percent >= 0) {
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printf(" Rebuild Status : %d%% complete\n\n", e->percent);
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is_rebuilding = 1;
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}
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free_mdstat(ms);
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if (have_super) {
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printf(" UUID : ");
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if (super.minor_version >= 90)
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printf("%08x:%08x:%08x:%08x", 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("%08x", super.set_uuid0);
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printf("\n Events : %d.%d\n\n", super.events_hi, super.events_lo);
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}
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printf(" Number Major Minor RaidDevice State\n");
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}
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for (d= 0; d<MD_SB_DISKS; d++) {
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mdu_disk_info_t disk;
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char *dv;
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disk.number = d;
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if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
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if (d < array.raid_disks)
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fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
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d, strerror(errno));
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continue;
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}
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if (d >= array.raid_disks &&
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disk.major == 0 &&
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disk.minor == 0)
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continue;
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if (!brief) {
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if (disk.number == array.raid_disks) printf("\n");
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if (disk.raid_disk < 0)
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printf(" %5d %5d %5d - ",
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disk.number, disk.major, disk.minor);
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else
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printf(" %5d %5d %5d %5d ",
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disk.number, disk.major, disk.minor, disk.raid_disk);
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if (disk.state & (1<<MD_DISK_FAULTY)) {
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printf(" faulty");
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if (disk.raid_disk < array.raid_disks &&
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disk.raid_disk >= 0)
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failed++;
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}
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if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
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if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
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if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
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if (disk.state == 0) printf(" spare");
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if (disk.state == 0) {
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if (is_26) {
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if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
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printf(" rebuilding");
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} else if (is_rebuilding && failed) {
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/* Taking a bit of a risk here, we remove the
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* device from the array, and then put it back.
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* If this fails, we are rebuilding
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*/
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int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
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if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
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if (err && errno == EBUSY)
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printf(" rebuilding");
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}
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}
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}
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if (disk.state == 0) spares++;
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if (test && d < array.raid_disks && disk.state & (1<<MD_DISK_FAULTY)) {
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if ((rv & 1) && (array.level ==4 || array.level == 5))
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rv |= 2;
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rv |= 1;
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}
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if ((dv=map_dev(disk.major, disk.minor))) {
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if (brief) {
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if (devices) {
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devices = realloc(devices,
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strlen(devices)+1+strlen(dv)+1);
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strcat(strcat(devices,","),dv);
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} else
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devices = strdup(dv);
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} else
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printf(" %s", dv);
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}
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if (!brief) printf("\n");
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}
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if (spares && brief) printf(" spares=%d", spares);
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if (have_super && brief) {
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printf(" UUID=");
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if (super.minor_version >= 90)
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printf("%08x:%08x:%08x:%08x", 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("%08x", super.set_uuid0);
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}
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if (brief && devices) printf("\n devices=%s", devices);
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if (brief) printf("\n");
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if (test && (rv&2)) rv &= ~1;
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close(fd);
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return rv;
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}
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