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/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
* Copyright (C) 2002 Neil Brown <neilb@cse.unsw.edu.au>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Neil Brown
* Email: <neilb@cse.unsw.edu.au>
* Paper: Neil Brown
* School of Computer Science and Engineering
* The University of New South Wales
* Sydney, 2052
* Australia
*/
#include "mdadm.h"
#include "md_p.h"
#include "md_u.h"
int Query(char *dev)
{
/* Give a brief description of the device,
* whether it is an md device and whether it has
* a superblock
*/
int fd = open(dev, O_RDONLY, 0);
int vers;
int ioctlerr;
int superror, superrno;
mdp_super_t super;
mdu_array_info_t array;
unsigned long long larray_size;
unsigned long array_size;
struct stat stb;
char *mddev;
mdu_disk_info_t disc;
char *activity;
if (fd < 0){
fprintf(stderr, Name ": cannot open %s: %s\n",
dev, strerror(errno));
return 1;
}
vers = md_get_version(fd);
if (ioctl(fd, GET_ARRAY_INFO, &array)<0)
ioctlerr = errno;
else ioctlerr = 0;
superror = load_super(fd, &super);
superrno = errno;
fstat(fd, &stb);
if (vers>=9000 && !ioctlerr) {
#ifdef BLKGETSIZE64
if (ioctl(fd, BLKGETSIZE64, &larray_size)==0)
;
else
#endif
if (ioctl(fd, BLKGETSIZE, &array_size)==0) {
larray_size = array_size;
larray_size <<= 9;
} else larray_size = 0;
}
close(fd);
if (vers < 0)
printf("%s: is not an md array\n", dev);
else if (vers < 9000)
printf("%s: is an md device, but kernel cannot provide details\n", dev);
else if (ioctlerr == ENODEV)
printf("%s: is an md device which is not active\n", dev);
else if (ioctlerr)
printf("%s: is an md device, but gives \"%s\" when queried\n",
dev, strerror(ioctlerr));
else {
printf("%s: %s %s %d devices, %d spare%s. Use mdadm --detail for more detail.\n",
dev,
human_size_brief(larray_size),
map_num(pers, array.level),
array.raid_disks,
array.spare_disks, array.spare_disks==1?"":"s");
}
switch(superror) {
case 1:
printf("%s: cannot find device size: %s\n",
dev, strerror(superrno));
break;
case 2:
printf("%s: is too small to be an md component.\n",
dev);
break;
case 3:
printf("%s: Cannot seek to superblock: %s\n",
dev, strerror(superrno));
break;
case 4:
printf("%s: Cannot read md superblock.\n",
dev);
break;
case 5:
printf("%s: No md super block found, not an md component.\n",
dev);
break;
case 6:
printf("%s: md superblock present with wrong version: %d\n",
dev, super.major_version);
break;
default:
/* array might be active... */
mddev = get_md_name(super.md_minor);
disc.number = super.this_disk.number;
activity = "undetected";
if (mddev && (fd = open(mddev, O_RDONLY))>=0) {
if (md_get_version(fd) >= 9000 &&
ioctl(fd, GET_ARRAY_INFO, &array)>= 0) {
if (ioctl(fd, GET_DISK_INFO, &disc) >= 0 &&
makedev((unsigned)disc.major,(unsigned)disc.minor) == stb.st_rdev)
activity = "active";
else
activity = "mismatch";
}
close(fd);
}
printf("%s: device %d in %d device %s %s md%d. Use mdadm --examine for more detail.\n",
dev,
super.this_disk.number, super.raid_disks,
activity,
map_num(pers, super.level),
super.md_minor);
break;
}
return 0;
}
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