To accurately detect when an array has been split and is now being recombined, we need to track which other devices each thinks is working. We should never include a device in an array if it thinks that the primary device has failed. This patch just allows get_info_super to return a list of devices and whether they are thought to be working or not. Signed-off-by: NeilBrown <neilb@suse.de>
125 lines
3.4 KiB
C
125 lines
3.4 KiB
C
/*
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* mdadm - manage Linux "md" devices aka RAID arrays.
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*
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* Copyright (C) 2002-2009 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@suse.de>
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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 Query(char *dev)
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{
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/* Give a brief description of the device,
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* whether it is an md device and whether it has
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* a superblock
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*/
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int fd = open(dev, O_RDONLY);
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int vers;
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int ioctlerr;
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int superror, superrno;
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struct mdinfo info;
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mdu_array_info_t array;
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struct supertype *st = NULL;
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unsigned long long larray_size;
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struct stat stb;
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char *mddev;
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mdu_disk_info_t disc;
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char *activity;
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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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vers = md_get_version(fd);
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if (ioctl(fd, GET_ARRAY_INFO, &array)<0)
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ioctlerr = errno;
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else ioctlerr = 0;
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fstat(fd, &stb);
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if (vers>=9000 && !ioctlerr) {
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if (!get_dev_size(fd, NULL, &larray_size))
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larray_size = 0;
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}
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if (vers < 0)
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printf("%s: is not an md array\n", dev);
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else if (vers < 9000)
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printf("%s: is an md device, but kernel cannot provide details\n", dev);
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else if (ioctlerr == ENODEV)
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printf("%s: is an md device which is not active\n", dev);
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else if (ioctlerr)
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printf("%s: is an md device, but gives \"%s\" when queried\n",
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dev, strerror(ioctlerr));
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else {
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printf("%s: %s %s %d devices, %d spare%s. Use mdadm --detail for more detail.\n",
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dev,
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human_size_brief(larray_size),
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map_num(pers, array.level),
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array.raid_disks,
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array.spare_disks, array.spare_disks==1?"":"s");
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}
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st = guess_super(fd);
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if (st) {
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superror = st->ss->load_super(st, fd, dev);
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superrno = errno;
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} else
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superror = -1;
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close(fd);
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if (superror == 0) {
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/* array might be active... */
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st->ss->getinfo_super(st, &info, NULL);
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if (st->ss == &super0) {
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mddev = get_md_name(info.array.md_minor);
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disc.number = info.disk.number;
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activity = "undetected";
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if (mddev && (fd = open(mddev, O_RDONLY))>=0) {
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if (md_get_version(fd) >= 9000 &&
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ioctl(fd, GET_ARRAY_INFO, &array)>= 0) {
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if (ioctl(fd, GET_DISK_INFO, &disc) >= 0 &&
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makedev((unsigned)disc.major,(unsigned)disc.minor) == stb.st_rdev)
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activity = "active";
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else
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activity = "mismatch";
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}
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close(fd);
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}
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} else {
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activity = "unknown";
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mddev = "array";
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}
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printf("%s: device %d in %d device %s %s %s. Use mdadm --examine for more detail.\n",
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dev,
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info.disk.number, info.array.raid_disks,
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activity,
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map_num(pers, info.array.level),
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mddev);
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if (st->ss == &super0)
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put_md_name(mddev);
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}
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return 0;
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}
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