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/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
* Copyright (C) 2002-2009 Neil Brown <neilb@suse.de>
*
*
* 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@suse.de>
*/
#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;
int ioctlerr, staterr;
int superror;
int level, raid_disks, spare_disks;
struct mdinfo info;
struct mdinfo *sra;
struct supertype *st = NULL;
unsigned long long larray_size;
struct stat stb;
char *mddev;
mdu_disk_info_t disc;
char *activity;
fd = open(dev, O_RDONLY);
if (fd < 0){
pr_err("cannot open %s: %s\n", dev, strerror(errno));
return 1;
}
if (fstat(fd, &stb) < 0)
staterr = errno;
else
staterr = 0;
ioctlerr = 0;
sra = sysfs_read(fd, dev, GET_DISKS | GET_LEVEL | GET_DEVS | GET_STATE);
if (sra) {
level = sra->array.level;
raid_disks = sra->array.raid_disks;
spare_disks = sra->array.spare_disks;
} else {
mdu_array_info_t array;
if (md_get_array_info(fd, &array) < 0) {
ioctlerr = errno;
level = -1;
raid_disks = -1;
spare_disks = -1;
} else {
level = array.level;
raid_disks = array.raid_disks;
spare_disks = array.spare_disks;
}
}
if (!ioctlerr && !staterr) {
if (!get_dev_size(fd, NULL, &larray_size))
larray_size = 0;
}
if (ioctlerr == ENODEV)
printf("%s: is an md device which is not active\n", dev);
else if (ioctlerr && major(stb.st_rdev) != MD_MAJOR)
printf("%s: is not an md array\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,IEC),
map_num(pers, level), raid_disks,
spare_disks, spare_disks == 1 ? "" : "s");
}
st = guess_super(fd);
if (st && st->ss->compare_super != NULL)
superror = st->ss->load_super(st, fd, dev);
else
superror = -1;
close(fd);
if (superror == 0) {
/* array might be active... */
int uuid[4];
struct map_ent *me, *map = NULL;
st->ss->getinfo_super(st, &info, NULL);
st->ss->uuid_from_super(st, uuid);
me = map_by_uuid(&map, uuid);
if (me) {
mddev = me->path;
disc.number = info.disk.number;
activity = "undetected";
if (mddev && (fd = open(mddev, O_RDONLY))>=0) {
if (md_array_active(fd)) {
if (md_get_disk_info(fd, &disc) >= 0 &&
makedev((unsigned)disc.major,(unsigned)disc.minor) == stb.st_rdev)
activity = "active";
else
activity = "mismatch";
}
close(fd);
}
} else {
activity = "inactive";
mddev = "array";
}
printf("%s: device %d in %d device %s %s %s. Use mdadm --examine for more detail.\n",
dev,
info.disk.number, info.array.raid_disks,
activity,
map_num(pers, info.array.level),
mddev);
if (st->ss == &super0)
put_md_name(mddev);
}
return 0;
}
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