71d60c480a
Given an mdadm.conf like the following allow /dev/imsm and /dev/md/r1 to be created by "mdadm -As". DEVICES partitions ARRAY /dev/imsm metadata=imsm auto=md UUID=b98f5dbe-aa859e7b-0e369b89-a80986d4 ARRAY /dev/md/r1 container=/dev/imsm member=0 auto=mdp UUID=3538e39c-b397c2e9-1aa031f9-2bc0eca4 spares=1 Signed-off-by: Dan Williams <dan.j.williams@intel.com>
1125 lines
32 KiB
C
1125 lines
32 KiB
C
/*
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* mdadm - manage Linux "md" devices aka RAID arrays.
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*
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* Copyright (C) 2001-2006 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@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 <ctype.h>
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static int name_matches(char *found, char *required, char *homehost)
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{
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/* See if the name found matches the required name, possibly
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* prefixed with 'homehost'
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*/
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char fnd[33];
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strncpy(fnd, found, 32);
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fnd[32] = 0;
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if (strcmp(found, required)==0)
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return 1;
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if (homehost) {
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int l = strlen(homehost);
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if (l < 32 && fnd[l] == ':' &&
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strcmp(fnd+l+1, required)==0)
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return 1;
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}
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return 0;
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}
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int Assemble(struct supertype *st, char *mddev, int mdfd,
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mddev_ident_t ident,
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mddev_dev_t devlist, char *backup_file,
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int readonly, int runstop,
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char *update, char *homehost,
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int verbose, int force)
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{
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/*
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* The task of Assemble is to find a collection of
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* devices that should (according to their superblocks)
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* form an array, and to give this collection to the MD driver.
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* In Linux-2.4 and later, this involves submitting a
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* SET_ARRAY_INFO ioctl with no arg - to prepare
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* the array - and then submit a number of
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* ADD_NEW_DISK ioctls to add disks into
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* the array. Finally RUN_ARRAY might
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* be submitted to start the array.
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*
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* Much of the work of Assemble is in finding and/or
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* checking the disks to make sure they look right.
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*
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* If mddev is not set, then scan must be set and we
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* read through the config file for dev+uuid mapping
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* We recurse, setting mddev, for each device that
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* - isn't running
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* - has a valid uuid (or any uuid if !uuidset)
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*
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* If mddev is set, we try to determine state of md.
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* check version - must be at least 0.90.0
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* check kernel version. must be at least 2.4.
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* If not, we can possibly fall back on START_ARRAY
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* Try to GET_ARRAY_INFO.
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* If possible, give up
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* If not, try to STOP_ARRAY just to make sure
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*
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* If !uuidset and scan, look in conf-file for uuid
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* If not found, give up
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* If !devlist and scan and uuidset, get list of devs from conf-file
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*
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* For each device:
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* Check superblock - discard if bad
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* Check uuid (set if we don't have one) - discard if no match
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* Check superblock similarity if we have a superblock - discard if different
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* Record events, devicenum
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* This should give us a list of devices for the array
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* We should collect the most recent event number
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*
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* Count disks with recent enough event count
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* While force && !enough disks
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* Choose newest rejected disks, update event count
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* mark clean and rewrite superblock
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* If recent kernel:
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* SET_ARRAY_INFO
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* foreach device with recent events : ADD_NEW_DISK
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* if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY
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* If old kernel:
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* Check the device numbers in superblock are right
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* update superblock if any changes
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* START_ARRAY
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*
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*/
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int clean = 0;
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int must_close = 0;
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int old_linux = 0;
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int vers = 0; /* Keep gcc quite - it really is initialised */
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struct {
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char *devname;
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int uptodate; /* set once we decide that this device is as
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* recent as everything else in the array.
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*/
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struct mdinfo i;
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} *devices;
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int *best = NULL; /* indexed by raid_disk */
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unsigned int bestcnt = 0;
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int devcnt = 0;
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unsigned int okcnt, sparecnt;
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unsigned int req_cnt;
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unsigned int i;
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int most_recent = 0;
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int chosen_drive;
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int change = 0;
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int inargv = 0;
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int bitmap_done;
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int start_partial_ok = (runstop >= 0) && (force || devlist==NULL || mdfd < 0);
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unsigned int num_devs;
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mddev_dev_t tmpdev;
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struct mdinfo info;
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char *avail;
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int nextspare = 0;
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int uuid_for_name = 0;
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memset(&info, 0, sizeof(info));
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if (get_linux_version() < 2004000)
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old_linux = 1;
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if (mdfd >= 0) {
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vers = md_get_version(mdfd);
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if (vers <= 0) {
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fprintf(stderr, Name ": %s appears not to be an md device.\n", mddev);
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return 1;
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}
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if (vers < 9000) {
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fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n"
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" Upgrade your kernel or try --build\n");
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return 1;
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}
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if (ioctl(mdfd, GET_ARRAY_INFO, &info.array)>=0) {
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fprintf(stderr, Name ": device %s already active - cannot assemble it\n",
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mddev);
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return 1;
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}
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ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */
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}
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/*
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* If any subdevs are listed, then any that don't
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* match ident are discarded. Remainder must all match and
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* become the array.
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* If no subdevs, then we scan all devices in the config file, but
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* there must be something in the identity
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*/
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if (!devlist &&
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ident->uuid_set == 0 &&
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ident->super_minor < 0 &&
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ident->devices == NULL) {
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fprintf(stderr, Name ": No identity information available for %s - cannot assemble.\n",
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mddev ? mddev : "further assembly");
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return 1;
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}
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/* if the configuration specifies a container then we use that to
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* determine the devices and retrieve the array configuration
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*/
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#ifndef MDASSEMBLE
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if (ident->container && ident->member) {
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int cfd = open(ident->container, O_RDWR);
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struct mdinfo *mdi;
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struct supertype container;
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if (verbose>0)
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fprintf(stderr, Name ": looking to assemble member array %s"
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" inside container %s\n", ident->member, ident->container);
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if (cfd < 0) {
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if (verbose>0)
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fprintf(stderr, Name ": unable to open container %s: %s\n",
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ident->container, strerror(errno));
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return 1;
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}
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mdi = sysfs_read(cfd, fd2devnum(cfd), GET_VERSION);
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if (!mdi) {
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close(cfd);
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if (verbose>0)
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fprintf(stderr, Name ": unable to read container %s\n",
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ident->container);
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return 1;
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}
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container.ss = find_metadata_methods(mdi->text_version);
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sysfs_free(mdi);
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if (!container.ss) {
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close(cfd);
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fprintf(stderr, Name ": %s uses unknown metadata: %s\n",
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ident->container, mdi->text_version);
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return 1;
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}
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if (container.ss->load_super(&container, cfd, ident->container)) {
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fprintf(stderr, Name ": Cannot load metadata for container %s\n",
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ident->container);
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return 1;
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}
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return Incremental_container(&container, ident->container,
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verbose, runstop, ident->autof);
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}
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#endif
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if (devlist == NULL)
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devlist = conf_get_devs();
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else if (mdfd >= 0)
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inargv = 1;
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try_again:
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tmpdev = devlist; num_devs = 0;
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while (tmpdev) {
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if (tmpdev->used)
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tmpdev->used = 2;
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else
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num_devs++;
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tmpdev = tmpdev->next;
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}
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devices = malloc(num_devs * sizeof(*devices));
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if (!st && ident->st) st = ident->st;
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if (verbose>0)
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fprintf(stderr, Name ": looking for devices for %s\n",
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mddev ? mddev : "further assembly");
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/* first walk the list of devices to find a consistent set
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* that match the criterea, if that is possible.
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* We flag the one we like with 'used'.
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*/
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for (tmpdev = devlist;
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tmpdev;
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tmpdev = tmpdev->next) {
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char *devname = tmpdev->devname;
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int dfd;
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struct stat stb;
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struct supertype *tst = dup_super(st);
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if (tmpdev->used > 1) continue;
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if (ident->devices &&
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!match_oneof(ident->devices, devname)) {
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if ((inargv && verbose>=0) || verbose > 0)
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fprintf(stderr, Name ": %s is not one of %s\n", devname, ident->devices);
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continue;
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}
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dfd = dev_open(devname, O_RDONLY|O_EXCL);
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if (dfd < 0) {
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if ((inargv && verbose >= 0) || verbose > 0)
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fprintf(stderr, Name ": cannot open device %s: %s\n",
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devname, strerror(errno));
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tmpdev->used = 2;
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} else if (fstat(dfd, &stb)< 0) {
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/* Impossible! */
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fprintf(stderr, Name ": fstat failed for %s: %s\n",
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devname, strerror(errno));
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tmpdev->used = 2;
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} else if ((stb.st_mode & S_IFMT) != S_IFBLK) {
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fprintf(stderr, Name ": %s is not a block device.\n",
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devname);
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tmpdev->used = 2;
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} else if (!tst && (tst = guess_super(dfd)) == NULL) {
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if ((inargv && verbose >= 0) || verbose > 0)
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fprintf(stderr, Name ": no recogniseable superblock on %s\n",
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devname);
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tmpdev->used = 2;
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} else if (tst->ss->load_super(tst,dfd, NULL)) {
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if ((inargv && verbose >= 0) || verbose > 0)
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fprintf( stderr, Name ": no RAID superblock on %s\n",
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devname);
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} else {
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tst->ss->getinfo_super(tst, &info);
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}
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if (dfd >= 0) close(dfd);
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if (ident->uuid_set && (!update || strcmp(update, "uuid")!= 0) &&
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(!tst || !tst->sb ||
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same_uuid(info.uuid, ident->uuid, tst->ss->swapuuid)==0)) {
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if ((inargv && verbose >= 0) || verbose > 0)
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fprintf(stderr, Name ": %s has wrong uuid.\n",
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devname);
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goto loop;
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}
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if (ident->name[0] && (!update || strcmp(update, "name")!= 0) &&
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(!tst || !tst->sb ||
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name_matches(info.name, ident->name, homehost)==0)) {
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if ((inargv && verbose >= 0) || verbose > 0)
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fprintf(stderr, Name ": %s has wrong name.\n",
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devname);
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goto loop;
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}
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if (ident->super_minor != UnSet &&
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(!tst || !tst->sb ||
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ident->super_minor != info.array.md_minor)) {
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if ((inargv && verbose >= 0) || verbose > 0)
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fprintf(stderr, Name ": %s has wrong super-minor.\n",
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devname);
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goto loop;
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}
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if (ident->level != UnSet &&
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(!tst || !tst->sb ||
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ident->level != info.array.level)) {
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if ((inargv && verbose >= 0) || verbose > 0)
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fprintf(stderr, Name ": %s has wrong raid level.\n",
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devname);
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goto loop;
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}
|
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if (ident->raid_disks != UnSet &&
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(!tst || !tst->sb ||
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ident->raid_disks!= info.array.raid_disks)) {
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if ((inargv && verbose >= 0) || verbose > 0)
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fprintf(stderr, Name ": %s requires wrong number of drives.\n",
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devname);
|
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goto loop;
|
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}
|
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if (mdfd < 0) {
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if (tst == NULL || tst->sb == NULL)
|
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continue;
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switch(tst->ss->match_home(tst, homehost))
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{
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case 1: /* happy with match. */
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break;
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case -1: /* cannot match */
|
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uuid_for_name = 1;
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break;
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case 0: /* Doesn't match */
|
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if (update)
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/* We are changing the name*/
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break;
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if ((inargv && verbose >= 0) || verbose > 0)
|
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fprintf(stderr, Name ": %s is not built for "
|
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"host %s - using UUID for "
|
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"device name.\n",
|
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devname, homehost);
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|
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/* Auto-assemble, and this is not a usable host */
|
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/* if update != NULL, we are updating the host
|
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* name... */
|
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uuid_for_name = 1;
|
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break;
|
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}
|
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}
|
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/* If we are this far, then we are nearly commited to this device.
|
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* If the super_block doesn't exist, or doesn't match others,
|
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* then we probably cannot continue
|
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* However if one of the arrays is for the homehost, and
|
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* the other isn't that can disambiguate.
|
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*/
|
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|
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if (!tst || !tst->sb) {
|
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fprintf(stderr, Name ": %s has no superblock - assembly aborted\n",
|
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devname);
|
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if (st)
|
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st->ss->free_super(st);
|
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return 1;
|
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}
|
|
|
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if (st == NULL)
|
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st = dup_super(tst);
|
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if (st->minor_version == -1)
|
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st->minor_version = tst->minor_version;
|
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if (st->ss != tst->ss ||
|
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st->minor_version != tst->minor_version ||
|
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st->ss->compare_super(st, tst) != 0) {
|
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/* Some mismatch. If exactly one array matches this host,
|
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* we can resolve on that one.
|
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* Or, if we are auto assembling, we just ignore the second
|
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* for now.
|
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*/
|
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if (mdfd < 0)
|
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goto loop;
|
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if (homehost) {
|
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int first = st->ss->match_home(st, homehost);
|
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int last = tst->ss->match_home(tst, homehost);
|
|
if (first != last &&
|
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(first == 1 || last == 1)) {
|
|
/* We can do something */
|
|
if (first) {/* just ignore this one */
|
|
if ((inargv && verbose >= 0) || verbose > 0)
|
|
fprintf(stderr, Name ": %s misses out due to wrong homehost\n",
|
|
devname);
|
|
goto loop;
|
|
} else { /* reject all those sofar */
|
|
mddev_dev_t td;
|
|
if ((inargv && verbose >= 0) || verbose > 0)
|
|
fprintf(stderr, Name ": %s overrides previous devices due to good homehost\n",
|
|
devname);
|
|
for (td=devlist; td != tmpdev; td=td->next)
|
|
if (td->used == 1)
|
|
td->used = 0;
|
|
tmpdev->used = 1;
|
|
goto loop;
|
|
}
|
|
}
|
|
}
|
|
fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n",
|
|
devname);
|
|
tst->ss->free_super(tst);
|
|
st->ss->free_super(st);
|
|
return 1;
|
|
}
|
|
|
|
tmpdev->used = 1;
|
|
|
|
loop:
|
|
if (tst)
|
|
tst->ss->free_super(tst);
|
|
}
|
|
|
|
if (mdfd < 0) {
|
|
/* So... it is up to me to open the device.
|
|
* We create a name '/dev/md/XXX' based on the info in the
|
|
* superblock, and call open_mddev on that
|
|
*/
|
|
mdu_array_info_t inf;
|
|
char *c;
|
|
char nbuf[64];
|
|
int rc;
|
|
|
|
if (!st || !st->sb) {
|
|
return 2;
|
|
}
|
|
st->ss->getinfo_super(st, &info);
|
|
if (uuid_for_name)
|
|
c = fname_from_uuid(st, &info, nbuf, '-');
|
|
else {
|
|
c = strchr(info.name, ':');
|
|
if (c) c++; else c= info.name;
|
|
}
|
|
if (isdigit(*c) && ((ident->autof & 7)==4 || (ident->autof&7)==6))
|
|
/* /dev/md/d0 style for partitionable */
|
|
rc = asprintf(&mddev, "/dev/md/d%s", c);
|
|
else
|
|
rc = asprintf(&mddev, "/dev/md/%s", c);
|
|
if (rc < 0)
|
|
mdfd = -1;
|
|
else
|
|
mdfd = open_mddev(mddev, ident->autof);
|
|
if (mdfd < 0) {
|
|
st->ss->free_super(st);
|
|
free(devices);
|
|
goto try_again;
|
|
}
|
|
vers = md_get_version(mdfd);
|
|
if (ioctl(mdfd, GET_ARRAY_INFO, &inf)==0) {
|
|
for (tmpdev = devlist ;
|
|
tmpdev && tmpdev->used != 1;
|
|
tmpdev = tmpdev->next)
|
|
;
|
|
fprintf(stderr, Name ": %s already active, cannot restart it!\n", mddev);
|
|
if (tmpdev)
|
|
fprintf(stderr, Name ": %s needed for %s...\n",
|
|
mddev, tmpdev->devname);
|
|
close(mdfd);
|
|
mdfd = -1;
|
|
st->ss->free_super(st);
|
|
free(devices);
|
|
goto try_again;
|
|
}
|
|
must_close = 1;
|
|
}
|
|
|
|
/* Ok, no bad inconsistancy, we can try updating etc */
|
|
bitmap_done = 0;
|
|
for (tmpdev = devlist; tmpdev; tmpdev=tmpdev->next) if (tmpdev->used == 1) {
|
|
char *devname = tmpdev->devname;
|
|
struct stat stb;
|
|
/* looks like a good enough match to update the super block if needed */
|
|
#ifndef MDASSEMBLE
|
|
if (update) {
|
|
int dfd;
|
|
/* prepare useful information in info structures */
|
|
struct stat stb2;
|
|
struct supertype *tst;
|
|
fstat(mdfd, &stb2);
|
|
|
|
if (strcmp(update, "uuid")==0 &&
|
|
!ident->uuid_set) {
|
|
int rfd;
|
|
if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
|
|
read(rfd, ident->uuid, 16) != 16) {
|
|
*(__u32*)(ident->uuid) = random();
|
|
*(__u32*)(ident->uuid+1) = random();
|
|
*(__u32*)(ident->uuid+2) = random();
|
|
*(__u32*)(ident->uuid+3) = random();
|
|
}
|
|
if (rfd >= 0) close(rfd);
|
|
}
|
|
dfd = dev_open(devname, O_RDWR|O_EXCL);
|
|
|
|
remove_partitions(dfd);
|
|
|
|
tst = dup_super(st);
|
|
tst->ss->load_super(tst, dfd, NULL);
|
|
tst->ss->getinfo_super(tst, &info);
|
|
|
|
memcpy(info.uuid, ident->uuid, 16);
|
|
strcpy(info.name, ident->name);
|
|
info.array.md_minor = minor(stb2.st_rdev);
|
|
|
|
tst->ss->update_super(tst, &info, update,
|
|
devname, verbose,
|
|
ident->uuid_set, homehost);
|
|
if (strcmp(update, "uuid")==0 &&
|
|
!ident->uuid_set) {
|
|
ident->uuid_set = 1;
|
|
memcpy(ident->uuid, info.uuid, 16);
|
|
}
|
|
if (dfd < 0)
|
|
fprintf(stderr, Name ": Cannot open %s for superblock update\n",
|
|
devname);
|
|
else if (tst->ss->store_super(tst, dfd))
|
|
fprintf(stderr, Name ": Could not re-write superblock on %s.\n",
|
|
devname);
|
|
if (dfd >= 0)
|
|
close(dfd);
|
|
|
|
if (strcmp(update, "uuid")==0 &&
|
|
ident->bitmap_fd >= 0 && !bitmap_done) {
|
|
if (bitmap_update_uuid(ident->bitmap_fd,
|
|
info.uuid,
|
|
tst->ss->swapuuid) != 0)
|
|
fprintf(stderr, Name ": Could not update uuid on external bitmap.\n");
|
|
else
|
|
bitmap_done = 1;
|
|
}
|
|
tst->ss->free_super(tst);
|
|
} else
|
|
#endif
|
|
{
|
|
struct supertype *tst = dup_super(st);
|
|
int dfd;
|
|
dfd = dev_open(devname, O_RDWR|O_EXCL);
|
|
|
|
remove_partitions(dfd);
|
|
|
|
tst->ss->load_super(tst, dfd, NULL);
|
|
tst->ss->getinfo_super(tst, &info);
|
|
tst->ss->free_super(tst);
|
|
close(dfd);
|
|
}
|
|
|
|
stat(devname, &stb);
|
|
|
|
if (verbose > 0)
|
|
fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n",
|
|
devname, mddev, info.disk.raid_disk);
|
|
devices[devcnt].devname = devname;
|
|
devices[devcnt].uptodate = 0;
|
|
devices[devcnt].i = info;
|
|
devices[devcnt].i.disk.major = major(stb.st_rdev);
|
|
devices[devcnt].i.disk.minor = minor(stb.st_rdev);
|
|
if (most_recent < devcnt) {
|
|
if (devices[devcnt].i.events
|
|
> devices[most_recent].i.events)
|
|
most_recent = devcnt;
|
|
}
|
|
if (info.array.level == -4)
|
|
/* with multipath, the raid_disk from the superblock is meaningless */
|
|
i = devcnt;
|
|
else
|
|
i = devices[devcnt].i.disk.raid_disk;
|
|
if (i+1 == 0) {
|
|
if (nextspare < info.array.raid_disks)
|
|
nextspare = info.array.raid_disks;
|
|
i = nextspare++;
|
|
} else {
|
|
if (i >= info.array.raid_disks &&
|
|
i >= nextspare)
|
|
nextspare = i+1;
|
|
}
|
|
if (i < 10000) {
|
|
if (i >= bestcnt) {
|
|
unsigned int newbestcnt = i+10;
|
|
int *newbest = malloc(sizeof(int)*newbestcnt);
|
|
unsigned int c;
|
|
for (c=0; c < newbestcnt; c++)
|
|
if (c < bestcnt)
|
|
newbest[c] = best[c];
|
|
else
|
|
newbest[c] = -1;
|
|
if (best)free(best);
|
|
best = newbest;
|
|
bestcnt = newbestcnt;
|
|
}
|
|
if (best[i] >=0 &&
|
|
devices[best[i]].i.events
|
|
== devices[devcnt].i.events
|
|
&& (devices[best[i]].i.disk.minor
|
|
!= devices[devcnt].i.disk.minor)
|
|
&& st->ss == &super0
|
|
&& info.array.level != LEVEL_MULTIPATH) {
|
|
/* two different devices with identical superblock.
|
|
* Could be a mis-detection caused by overlapping
|
|
* partitions. fail-safe.
|
|
*/
|
|
fprintf(stderr, Name ": WARNING %s and %s appear"
|
|
" to have very similar superblocks.\n"
|
|
" If they are really different, "
|
|
"please --zero the superblock on one\n"
|
|
" If they are the same or overlap,"
|
|
" please remove one from %s.\n",
|
|
devices[best[i]].devname, devname,
|
|
inargv ? "the list" :
|
|
"the\n DEVICE list in mdadm.conf"
|
|
);
|
|
if (must_close) close(mdfd);
|
|
return 1;
|
|
}
|
|
if (best[i] == -1
|
|
|| (devices[best[i]].i.events
|
|
< devices[devcnt].i.events))
|
|
best[i] = devcnt;
|
|
}
|
|
devcnt++;
|
|
}
|
|
|
|
if (devcnt == 0) {
|
|
fprintf(stderr, Name ": no devices found for %s\n",
|
|
mddev);
|
|
if (st)
|
|
st->ss->free_super(st);
|
|
if (must_close) close(mdfd);
|
|
return 1;
|
|
}
|
|
|
|
if (update && strcmp(update, "byteorder")==0)
|
|
st->minor_version = 90;
|
|
|
|
st->ss->getinfo_super(st, &info);
|
|
clean = info.array.state & 1;
|
|
|
|
/* now we have some devices that might be suitable.
|
|
* I wonder how many
|
|
*/
|
|
avail = malloc(info.array.raid_disks);
|
|
memset(avail, 0, info.array.raid_disks);
|
|
okcnt = 0;
|
|
sparecnt=0;
|
|
for (i=0; i< bestcnt ;i++) {
|
|
int j = best[i];
|
|
int event_margin = 1; /* always allow a difference of '1'
|
|
* like the kernel does
|
|
*/
|
|
if (j < 0) continue;
|
|
/* note: we ignore error flags in multipath arrays
|
|
* as they don't make sense
|
|
*/
|
|
if (info.array.level != -4)
|
|
if (!(devices[j].i.disk.state & (1<<MD_DISK_SYNC))) {
|
|
if (!(devices[j].i.disk.state
|
|
& (1<<MD_DISK_FAULTY)))
|
|
sparecnt++;
|
|
continue;
|
|
}
|
|
if (devices[j].i.events+event_margin >=
|
|
devices[most_recent].i.events) {
|
|
devices[j].uptodate = 1;
|
|
if (i < info.array.raid_disks) {
|
|
okcnt++;
|
|
avail[i]=1;
|
|
} else
|
|
sparecnt++;
|
|
}
|
|
}
|
|
while (force && !enough(info.array.level, info.array.raid_disks,
|
|
info.array.layout, 1,
|
|
avail, okcnt)) {
|
|
/* Choose the newest best drive which is
|
|
* not up-to-date, update the superblock
|
|
* and add it.
|
|
*/
|
|
int fd;
|
|
struct supertype *tst;
|
|
long long current_events;
|
|
chosen_drive = -1;
|
|
for (i=0; i<info.array.raid_disks && i < bestcnt; i++) {
|
|
int j = best[i];
|
|
if (j>=0 &&
|
|
!devices[j].uptodate &&
|
|
devices[j].i.events > 0 &&
|
|
(chosen_drive < 0 ||
|
|
devices[j].i.events
|
|
> devices[chosen_drive].i.events))
|
|
chosen_drive = j;
|
|
}
|
|
if (chosen_drive < 0)
|
|
break;
|
|
current_events = devices[chosen_drive].i.events;
|
|
add_another:
|
|
if (verbose >= 0)
|
|
fprintf(stderr, Name ": forcing event count in %s(%d) from %d upto %d\n",
|
|
devices[chosen_drive].devname,
|
|
devices[chosen_drive].i.disk.raid_disk,
|
|
(int)(devices[chosen_drive].i.events),
|
|
(int)(devices[most_recent].i.events));
|
|
fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
|
|
if (fd < 0) {
|
|
fprintf(stderr, Name ": Couldn't open %s for write - not updating\n",
|
|
devices[chosen_drive].devname);
|
|
devices[chosen_drive].i.events = 0;
|
|
continue;
|
|
}
|
|
tst = dup_super(st);
|
|
if (tst->ss->load_super(tst,fd, NULL)) {
|
|
close(fd);
|
|
fprintf(stderr, Name ": RAID superblock disappeared from %s - not updating.\n",
|
|
devices[chosen_drive].devname);
|
|
devices[chosen_drive].i.events = 0;
|
|
continue;
|
|
}
|
|
info.events = devices[most_recent].i.events;
|
|
tst->ss->update_super(tst, &info, "force-one",
|
|
devices[chosen_drive].devname, verbose,
|
|
0, NULL);
|
|
|
|
if (tst->ss->store_super(tst, fd)) {
|
|
close(fd);
|
|
fprintf(stderr, Name ": Could not re-write superblock on %s\n",
|
|
devices[chosen_drive].devname);
|
|
devices[chosen_drive].i.events = 0;
|
|
tst->ss->free_super(tst);
|
|
continue;
|
|
}
|
|
close(fd);
|
|
devices[chosen_drive].i.events = devices[most_recent].i.events;
|
|
devices[chosen_drive].uptodate = 1;
|
|
avail[chosen_drive] = 1;
|
|
okcnt++;
|
|
tst->ss->free_super(tst);
|
|
|
|
/* If there are any other drives of the same vintage,
|
|
* add them in as well. We can't lose and we might gain
|
|
*/
|
|
for (i=0; i<info.array.raid_disks && i < bestcnt ; i++) {
|
|
int j = best[i];
|
|
if (j >= 0 &&
|
|
!devices[j].uptodate &&
|
|
devices[j].i.events > 0 &&
|
|
devices[j].i.events == current_events) {
|
|
chosen_drive = j;
|
|
goto add_another;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Now we want to look at the superblock which the kernel will base things on
|
|
* and compare the devices that we think are working with the devices that the
|
|
* superblock thinks are working.
|
|
* If there are differences and --force is given, then update this chosen
|
|
* superblock.
|
|
*/
|
|
chosen_drive = -1;
|
|
st->ss->free_super(st);
|
|
for (i=0; chosen_drive < 0 && i<bestcnt; i++) {
|
|
int j = best[i];
|
|
int fd;
|
|
|
|
if (j<0)
|
|
continue;
|
|
if (!devices[j].uptodate)
|
|
continue;
|
|
chosen_drive = j;
|
|
if ((fd=dev_open(devices[j].devname, O_RDONLY|O_EXCL))< 0) {
|
|
fprintf(stderr, Name ": Cannot open %s: %s\n",
|
|
devices[j].devname, strerror(errno));
|
|
if (must_close) close(mdfd);
|
|
return 1;
|
|
}
|
|
if (st->ss->load_super(st,fd, NULL)) {
|
|
close(fd);
|
|
fprintf(stderr, Name ": RAID superblock has disappeared from %s\n",
|
|
devices[j].devname);
|
|
if (must_close) close(mdfd);
|
|
return 1;
|
|
}
|
|
close(fd);
|
|
}
|
|
if (st->sb == NULL) {
|
|
fprintf(stderr, Name ": No suitable drives found for %s\n", mddev);
|
|
if (must_close) close(mdfd);
|
|
return 1;
|
|
}
|
|
st->ss->getinfo_super(st, &info);
|
|
#ifndef MDASSEMBLE
|
|
sysfs_init(&info, mdfd, 0);
|
|
#endif
|
|
for (i=0; i<bestcnt; i++) {
|
|
int j = best[i];
|
|
unsigned int desired_state;
|
|
|
|
if (i < info.array.raid_disks)
|
|
desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC);
|
|
else
|
|
desired_state = 0;
|
|
|
|
if (j<0)
|
|
continue;
|
|
if (!devices[j].uptodate)
|
|
continue;
|
|
|
|
devices[j].i.disk.state = desired_state;
|
|
|
|
if (st->ss->update_super(st, &devices[j].i, "assemble", NULL,
|
|
verbose, 0, NULL)) {
|
|
if (force) {
|
|
if (verbose >= 0)
|
|
fprintf(stderr, Name ": "
|
|
"clearing FAULTY flag for device %d in %s for %s\n",
|
|
j, mddev, devices[j].devname);
|
|
change = 1;
|
|
} else {
|
|
if (verbose >= -1)
|
|
fprintf(stderr, Name ": "
|
|
"device %d in %s has wrong state in superblock, but %s seems ok\n",
|
|
i, mddev, devices[j].devname);
|
|
}
|
|
}
|
|
#if 0
|
|
if (!(super.disks[i].i.disk.state & (1 << MD_DISK_FAULTY))) {
|
|
fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
|
|
i, mddev);
|
|
}
|
|
#endif
|
|
}
|
|
if (force && !clean &&
|
|
!enough(info.array.level, info.array.raid_disks,
|
|
info.array.layout, clean,
|
|
avail, okcnt)) {
|
|
change += st->ss->update_super(st, &info, "force-array",
|
|
devices[chosen_drive].devname, verbose,
|
|
0, NULL);
|
|
clean = 1;
|
|
}
|
|
|
|
if (change) {
|
|
int fd;
|
|
fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
|
|
if (fd < 0) {
|
|
fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n",
|
|
devices[chosen_drive].devname);
|
|
if (must_close) close(mdfd);
|
|
return 1;
|
|
}
|
|
if (st->ss->store_super(st, fd)) {
|
|
close(fd);
|
|
fprintf(stderr, Name ": Could not re-write superblock on %s\n",
|
|
devices[chosen_drive].devname);
|
|
if (must_close) close(mdfd);
|
|
return 1;
|
|
}
|
|
close(fd);
|
|
}
|
|
|
|
/* If we are in the middle of a reshape we may need to restore saved data
|
|
* that was moved aside due to the reshape overwriting live data
|
|
* The code of doing this lives in Grow.c
|
|
*/
|
|
#ifndef MDASSEMBLE
|
|
if (info.reshape_active) {
|
|
int err = 0;
|
|
int *fdlist = malloc(sizeof(int)* bestcnt);
|
|
for (i=0; i<bestcnt; i++) {
|
|
int j = best[i];
|
|
if (j >= 0) {
|
|
fdlist[i] = dev_open(devices[j].devname, O_RDWR|O_EXCL);
|
|
if (fdlist[i] < 0) {
|
|
fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n",
|
|
devices[j].devname);
|
|
err = 1;
|
|
break;
|
|
}
|
|
} else
|
|
fdlist[i] = -1;
|
|
}
|
|
if (!err)
|
|
err = Grow_restart(st, &info, fdlist, bestcnt, backup_file);
|
|
while (i>0) {
|
|
i--;
|
|
if (fdlist[i]>=0) close(fdlist[i]);
|
|
}
|
|
if (err) {
|
|
fprintf(stderr, Name ": Failed to restore critical section for reshape, sorry.\n");
|
|
if (must_close) close(mdfd);
|
|
return err;
|
|
}
|
|
}
|
|
#endif
|
|
/* count number of in-sync devices according to the superblock.
|
|
* We must have this number to start the array without -s or -R
|
|
*/
|
|
req_cnt = info.array.working_disks;
|
|
|
|
/* Almost ready to actually *do* something */
|
|
if (!old_linux) {
|
|
int rv;
|
|
|
|
rv = set_array_info(mdfd, st, &info);
|
|
if (rv) {
|
|
fprintf(stderr, Name ": failed to set array info for %s: %s\n",
|
|
mddev, strerror(errno));
|
|
if (must_close) close(mdfd);
|
|
return 1;
|
|
}
|
|
if (ident->bitmap_fd >= 0) {
|
|
if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) {
|
|
fprintf(stderr, Name ": SET_BITMAP_FILE failed.\n");
|
|
if (must_close) close(mdfd);
|
|
return 1;
|
|
}
|
|
} else if (ident->bitmap_file) {
|
|
/* From config file */
|
|
int bmfd = open(ident->bitmap_file, O_RDWR);
|
|
if (bmfd < 0) {
|
|
fprintf(stderr, Name ": Could not open bitmap file %s\n",
|
|
ident->bitmap_file);
|
|
if (must_close) close(mdfd);
|
|
return 1;
|
|
}
|
|
if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
|
|
fprintf(stderr, Name ": Failed to set bitmapfile for %s\n", mddev);
|
|
close(bmfd);
|
|
if (must_close) close(mdfd);
|
|
return 1;
|
|
}
|
|
close(bmfd);
|
|
}
|
|
|
|
/* First, add the raid disks, but add the chosen one last */
|
|
for (i=0; i<= bestcnt; i++) {
|
|
int j;
|
|
if (i < bestcnt) {
|
|
j = best[i];
|
|
if (j == chosen_drive)
|
|
continue;
|
|
} else
|
|
j = chosen_drive;
|
|
|
|
if (j >= 0 /* && devices[j].uptodate */) {
|
|
rv = add_disk(mdfd, st, &info, &devices[j].i);
|
|
|
|
if (rv) {
|
|
fprintf(stderr, Name ": failed to add "
|
|
"%s to %s: %s\n",
|
|
devices[j].devname,
|
|
mddev,
|
|
strerror(errno));
|
|
if (i < info.array.raid_disks
|
|
|| i == bestcnt)
|
|
okcnt--;
|
|
else
|
|
sparecnt--;
|
|
} else if (verbose > 0)
|
|
fprintf(stderr, Name ": added %s "
|
|
"to %s as %d\n",
|
|
devices[j].devname, mddev,
|
|
devices[j].i.disk.raid_disk);
|
|
} else if (verbose > 0 && i < info.array.raid_disks)
|
|
fprintf(stderr, Name ": no uptodate device for "
|
|
"slot %d of %s\n",
|
|
i, mddev);
|
|
}
|
|
|
|
if (info.array.level == LEVEL_CONTAINER) {
|
|
if (verbose >= 0) {
|
|
fprintf(stderr, Name ": Container %s has been "
|
|
"assembled with %d drive%s",
|
|
mddev, okcnt+sparecnt, okcnt+sparecnt==1?"":"s");
|
|
if (okcnt < info.array.raid_disks)
|
|
fprintf(stderr, " (out of %d)",
|
|
info.array.raid_disks);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
if (must_close)
|
|
close(mdfd);
|
|
return 0;
|
|
}
|
|
|
|
if (runstop == 1 ||
|
|
(runstop <= 0 &&
|
|
( enough(info.array.level, info.array.raid_disks,
|
|
info.array.layout, clean, avail, okcnt) &&
|
|
(okcnt >= req_cnt || start_partial_ok)
|
|
))) {
|
|
if (ioctl(mdfd, RUN_ARRAY, NULL)==0) {
|
|
if (verbose >= 0) {
|
|
fprintf(stderr, Name ": %s has been started with %d drive%s",
|
|
mddev, okcnt, okcnt==1?"":"s");
|
|
if (okcnt < info.array.raid_disks)
|
|
fprintf(stderr, " (out of %d)", info.array.raid_disks);
|
|
if (sparecnt)
|
|
fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
|
|
fprintf(stderr, ".\n");
|
|
}
|
|
if (must_close) {
|
|
int usecs = 1;
|
|
close(mdfd);
|
|
/* There is a nasty race with 'mdadm --monitor'.
|
|
* If it opens this device before we close it,
|
|
* it gets an incomplete open on which IO
|
|
* doesn't work and the capacity is
|
|
* wrong.
|
|
* If we reopen (to check for layered devices)
|
|
* before --monitor closes, we loose.
|
|
*
|
|
* So: wait upto 1 second for there to be
|
|
* a non-zero capacity.
|
|
*/
|
|
while (usecs < 1000) {
|
|
mdfd = open(mddev, O_RDONLY);
|
|
if (mdfd >= 0) {
|
|
unsigned long long size;
|
|
if (get_dev_size(mdfd, NULL, &size) &&
|
|
size > 0)
|
|
break;
|
|
close(mdfd);
|
|
}
|
|
usleep(usecs);
|
|
usecs <<= 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n",
|
|
mddev, strerror(errno));
|
|
|
|
if (!enough(info.array.level, info.array.raid_disks,
|
|
info.array.layout, 1, avail, okcnt))
|
|
fprintf(stderr, Name ": Not enough devices to "
|
|
"start the array.\n");
|
|
else if (!enough(info.array.level,
|
|
info.array.raid_disks,
|
|
info.array.layout, clean,
|
|
avail, okcnt))
|
|
fprintf(stderr, Name ": Not enough devices to "
|
|
"start the array while not clean "
|
|
"- consider --force.\n");
|
|
|
|
if (must_close) {
|
|
ioctl(mdfd, STOP_ARRAY, NULL);
|
|
close(mdfd);
|
|
}
|
|
return 1;
|
|
}
|
|
if (runstop == -1) {
|
|
fprintf(stderr, Name ": %s assembled from %d drive%s",
|
|
mddev, okcnt, okcnt==1?"":"s");
|
|
if (okcnt != info.array.raid_disks)
|
|
fprintf(stderr, " (out of %d)", info.array.raid_disks);
|
|
fprintf(stderr, ", but not started.\n");
|
|
if (must_close) close(mdfd);
|
|
return 0;
|
|
}
|
|
if (verbose >= -1) {
|
|
fprintf(stderr, Name ": %s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s");
|
|
if (sparecnt)
|
|
fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
|
|
if (!enough(info.array.level, info.array.raid_disks,
|
|
info.array.layout, 1, avail, okcnt))
|
|
fprintf(stderr, " - not enough to start the array.\n");
|
|
else if (!enough(info.array.level,
|
|
info.array.raid_disks,
|
|
info.array.layout, clean,
|
|
avail, okcnt))
|
|
fprintf(stderr, " - not enough to start the "
|
|
"array while not clean - consider "
|
|
"--force.\n");
|
|
else {
|
|
if (req_cnt == info.array.raid_disks)
|
|
fprintf(stderr, " - need all %d to start it", req_cnt);
|
|
else
|
|
fprintf(stderr, " - need %d of %d to start", req_cnt, info.array.raid_disks);
|
|
fprintf(stderr, " (use --run to insist).\n");
|
|
}
|
|
}
|
|
if (must_close) {
|
|
ioctl(mdfd, STOP_ARRAY, NULL);
|
|
close(mdfd);
|
|
}
|
|
return 1;
|
|
} else {
|
|
/* The "chosen_drive" is a good choice, and if necessary, the superblock has
|
|
* been updated to point to the current locations of devices.
|
|
* so we can just start the array
|
|
*/
|
|
unsigned long dev;
|
|
dev = makedev(devices[chosen_drive].i.disk.major,
|
|
devices[chosen_drive].i.disk.minor);
|
|
if (ioctl(mdfd, START_ARRAY, dev)) {
|
|
fprintf(stderr, Name ": Cannot start array: %s\n",
|
|
strerror(errno));
|
|
}
|
|
|
|
}
|
|
if (must_close) close(mdfd);
|
|
return 0;
|
|
}
|