mdctl-v0.2
This commit is contained in:
commit
64c4757e27
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@ -0,0 +1,366 @@
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/*
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* mdctl - manage Linux "md" devices aka RAID arrays.
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*
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* Copyright (C) 2001 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 "mdctl.h"
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#include "md_p.h"
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#include "md_u.h"
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int Assemble(char *mddev, int mdfd,
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int uuid[4], int uuidset,
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char *conffile, int scan,
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int subdevs, char **subdev,
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int readonly, int runstop,
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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 submit 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 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 !subdevs 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 superbloc - discard if different
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* Record events, devicenum, utime
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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 and utime numbers
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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 old_linux = 0;
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int vers;
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mdu_array_info_t array;
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mddev_dev_t devlist = NULL;
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mdp_super_t first_super, super;
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struct {
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char *devname;
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int major, minor;
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long long events;
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time_t utime;
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int uptodate;
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} devices[MD_SB_DISKS];
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int best[MD_SB_DISKS]; /* indexed by raid_disk */
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int devcnt = 0, okcnt;
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int i;
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int most_recent = 0;
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if (!mddev && !scan) {
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fputs("mdctl: internal error - Assemble called with no devie or scan\n", stderr);
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return 1;
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}
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if (!mddev) {
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mddev_uuid_t device_list;
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int found = 0;
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device_list = conf_get_uuids(conffile);
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if (!device_list) {
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fprintf(stderr, "mdctl: No devices found in config file\n");
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return 1;
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}
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while (device_list) {
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if (!uuidset || same_uuid(device_list->uuid,uuid)) {
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mdfd = open(device_list->devname, O_RDONLY, 0);
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if (mdfd < 0) {
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fprintf(stderr,
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"mdctl: error opening %s: %s\n",
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device_list->devname,
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strerror(errno));
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continue;
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}
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if (Assemble(device_list->devname, mdfd,
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device_list->uuid, 1,
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conffile, 1,
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subdevs, subdev,
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readonly, runstop, verbose, force)==0)
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found++;
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close(mdfd);
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}
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device_list = device_list->next;
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}
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if (found)
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return 0;
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fprintf(stderr,"mdctl: Did not successful Assemble any devices\n");
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return 1;
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}
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/*
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* Ok, we have an mddev, check it out
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*/
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vers = md_get_version(mdfd);
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if (vers <= 0) {
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fprintf(stderr, "mdctl: %s appears not to be an md device.\n");
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return 1;
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}
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if (vers < (90<<8)) {
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fprintf(stderr, "mdctl: 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 (get_linux_version() < 0x020400)
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old_linux = 1;
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if (ioctl(mdfd, GET_ARRAY_INFO, &array)>=0) {
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fprintf(stderr, "mdctl: 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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* We have a valid mddev, check out uuid
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*/
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if (!uuidset && scan) {
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/* device must be listed with uuid in conf file */
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mddev_uuid_t device_list;
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device_list = conf_get_uuids(conffile);
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while (device_list &&
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strcmp(device_list->devname, mddev) != 0)
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device_list = device_list->next;
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if (!device_list) {
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fprintf(stderr, "mdctl: --scan set and no uuid found for %s in config file.\n",
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mddev);
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return 1;
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}
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/* the uuid is safe until next call to conf_get_uuids */
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uuid = device_list->uuid;
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uuidset = 1;
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}
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/* Now to start looking at devices.
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* If no devices were given, but a uuid is available and
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* --scan was set, then we should scan all devices listed in the
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* config file
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*
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*/
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if (subdevs==0 && scan && uuidset)
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devlist = conf_get_devs(conffile);
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if (subdevs == 0 && devlist == NULL) {
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fprintf(stderr, "mdctl: no devices given for %s\n", mddev);
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return 1;
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}
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/* now for each device */
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first_super.md_magic = 0;
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for (i=0; i<MD_SB_DISKS; i++)
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best[i] = -1;
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while (subdevs || devlist) {
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char *devname;
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int this_uuid[4];
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int dfd;
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struct stat stb;
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int inargv;
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if (subdevs) {
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devname = *subdev++;
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subdevs--;
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inargv=1;
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} else {
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devname = devlist->devname;
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devlist = devlist->next;
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inargv=0;
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}
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dfd = open(devname, O_RDONLY, 0);
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if (dfd < 0) {
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if (inargv || verbose)
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fprintf(stderr, "mdctl: cannot open device %s: %s\n",
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devname, strerror(errno));
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continue;
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}
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if (fstat(dfd, &stb)< 0) {
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/* Impossible! */
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fprintf(stderr, "mdctl: fstat failed for %s: %s\n",
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devname, strerror(errno));
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close(dfd);
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continue;
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}
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if ((stb.st_mode & S_IFMT) != S_IFBLK) {
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fprintf(stderr, "mdctl: %d is not a block device.\n",
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devname);
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close(dfd);
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continue;
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}
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if (load_super(dfd, &super)) {
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if (inargv || verbose)
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fprintf( stderr, "mdctl: no RAID superblock on %s\n",
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devname);
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close(dfd);
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continue;
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}
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close(dfd);
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if (compare_super(&first_super, &super)) {
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if (inargv || verbose)
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fprintf(stderr, "mdctl: superblock on %s doesn't match\n",
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devname);
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continue;
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}
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if (uuidset) {
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uuid_from_super(this_uuid, &first_super);
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|
if (!same_uuid(this_uuid, uuid)) {
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if (inargv || verbose)
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fprintf(stderr, "mdctl: %s has wrong uuid.\n",
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devname);
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continue;
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|
}
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|
} else {
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uuid_from_super(uuid, &first_super);
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uuidset = 1;
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}
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/* Ok, this one is at least worth considering */
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if (devcnt >= MD_SB_DISKS) {
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fprintf(stderr, "mdctl: ouch - too many devices appear to be in this array. Ignoring %s\n",
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devname);
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|
continue;
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|
}
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|
devices[devcnt].devname = devname;
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|
devices[devcnt].major = MAJOR(stb.st_rdev);
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devices[devcnt].minor = MINOR(stb.st_rdev);
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devices[devcnt].events = md_event(&super);
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|
devices[devcnt].utime = super.utime;
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|
devices[devcnt].uptodate = 0;
|
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|
if (most_recent < devcnt) {
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|
if (devices[devcnt].events
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|
> devices[most_recent].events)
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|
most_recent = devcnt;
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|
}
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|
i = super.this_disk.raid_disk;
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|
if (best[i] == -1
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|
|| devices[best[i]].events < devices[devcnt].events) {
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|
best[i] = devcnt;
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||||||
|
}
|
||||||
|
devcnt++;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (devcnt == 0) {
|
||||||
|
fprintf(stderr, "mdctl: no devices found for %s\n",
|
||||||
|
mddev);
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
/* now we have some devices that might be suitable.
|
||||||
|
* I wonder how many
|
||||||
|
*/
|
||||||
|
okcnt = 0;
|
||||||
|
for (i=0; i< first_super.raid_disks;i++) {
|
||||||
|
int j = best[i];
|
||||||
|
if (j < 0) continue;
|
||||||
|
if (devices[j].events+1 >=
|
||||||
|
devices[most_recent].events) {
|
||||||
|
devices[j].uptodate = 1;
|
||||||
|
okcnt++;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
while (force && !enough(first_super.level, first_super.raid_disks, okcnt)) {
|
||||||
|
/* Choose the newest best drive which is
|
||||||
|
* not up-to-date, update the superblock
|
||||||
|
* and add it.
|
||||||
|
*/
|
||||||
|
fprintf(stderr,"NoImplementedYet\n");
|
||||||
|
/* FIXME */
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
/* Almost ready to actually *do* something */
|
||||||
|
if (!old_linux) {
|
||||||
|
if (ioctl(mdfd, SET_ARRAY_INFO, NULL) != 0) {
|
||||||
|
fprintf(stderr, "mdctl: SET_ARRAY_INFO failed for %s: %s\n",
|
||||||
|
mddev, strerror(errno));
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
/* First, add the raid disks */
|
||||||
|
for (i=0; i<first_super.raid_disks; i++) {
|
||||||
|
int j = best[i];
|
||||||
|
if (devices[j].uptodate) {
|
||||||
|
mdu_disk_info_t disk;
|
||||||
|
memset(&disk, 0, sizeof(disk));
|
||||||
|
disk.major = devices[j].major;
|
||||||
|
disk.minor = devices[j].minor;
|
||||||
|
if (ioctl(mdfd, ADD_NEW_DISK, &disk)!=0) {
|
||||||
|
fprintf(stderr, "mdctl: failed to add %s to %s: %s\n",
|
||||||
|
devices[j].devname,
|
||||||
|
mddev,
|
||||||
|
strerror(errno));
|
||||||
|
} else
|
||||||
|
okcnt--;
|
||||||
|
} else if (verbose)
|
||||||
|
fprintf(stderr, "mdctl: no uptodate device for slot %d of %s\n",
|
||||||
|
i, mddev);
|
||||||
|
}
|
||||||
|
if (runstop == 1 ||
|
||||||
|
(runstop == 0 &&
|
||||||
|
enough(first_super.level, first_super.raid_disks, okcnt))) {
|
||||||
|
if (ioctl(mdfd, RUN_ARRAY, NULL)==0)
|
||||||
|
return 0;
|
||||||
|
fprintf(stderr, "mdctl: failed to RUN_ARRAY %s: %s\n",
|
||||||
|
mddev, strerror(errno));
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
if (runstop == -1)
|
||||||
|
return 0;
|
||||||
|
else return 1;
|
||||||
|
} else {
|
||||||
|
/* FIXME */
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,36 @@
|
||||||
|
/*
|
||||||
|
* mdctl - manage Linux "md" devices aka RAID arrays.
|
||||||
|
*
|
||||||
|
* Copyright (C) 2001 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 "mdctl.h"
|
||||||
|
|
||||||
|
int Build(char *mddev, int mdfd, int chunk, int level,
|
||||||
|
int raiddisks,
|
||||||
|
int subdevs, char *subdev[])
|
||||||
|
{
|
||||||
|
}
|
|
@ -0,0 +1,37 @@
|
||||||
|
/*
|
||||||
|
* mdctl - manage Linux "md" devices aka RAID arrays.
|
||||||
|
*
|
||||||
|
* Copyright (C) 2001 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 "mdctl.h"
|
||||||
|
|
||||||
|
int Create(char *mddev, int mdfd,
|
||||||
|
int chunk, int level, int layout, int raiddisks, int sparedisks,
|
||||||
|
int subdevs, char *subdev[],
|
||||||
|
int runstop)
|
||||||
|
{
|
||||||
|
}
|
|
@ -0,0 +1,120 @@
|
||||||
|
/*
|
||||||
|
* mdctl - manage Linux "md" devices aka RAID arrays.
|
||||||
|
*
|
||||||
|
* Copyright (C) 2001 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 "mdctl.h"
|
||||||
|
#include "md_p.h"
|
||||||
|
#include "md_u.h"
|
||||||
|
|
||||||
|
int Detail(char *dev)
|
||||||
|
{
|
||||||
|
/*
|
||||||
|
* Print out details for an md array by using
|
||||||
|
* GET_ARRAY_INFO and GET_DISK_INFO ioctl calls
|
||||||
|
*/
|
||||||
|
|
||||||
|
int fd = open(dev, O_RDONLY, 0);
|
||||||
|
int vers;
|
||||||
|
mdu_array_info_t array;
|
||||||
|
int d;
|
||||||
|
time_t atime;
|
||||||
|
|
||||||
|
if (fd < 0) {
|
||||||
|
fprintf(stderr, "mdctl: cannot open %s: %s\n",
|
||||||
|
dev, strerror(errno));
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
vers = md_get_version(fd);
|
||||||
|
if (vers < 0) {
|
||||||
|
fprintf(stderr, "mdctl: %s does not appear to be an md device\n",
|
||||||
|
dev);
|
||||||
|
close(fd);
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
if (vers < (90<<8)) {
|
||||||
|
fprintf(stderr, "mdctl: cannot get detail for md device %s: driver version too old.\n",
|
||||||
|
dev);
|
||||||
|
close(fd);
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
|
||||||
|
if (errno == ENODEV)
|
||||||
|
fprintf(stderr, "mdctl: md device %s does not appear to be active.\n",
|
||||||
|
dev);
|
||||||
|
else
|
||||||
|
fprintf(stderr, "mdctl: cannot get array detail for %s: %s\n",
|
||||||
|
dev, strerror(errno));
|
||||||
|
close(fd);
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
/* Ok, we have some info to print... */
|
||||||
|
printf("%s:\n", dev);
|
||||||
|
printf(" Version : %02d.%02d.%02d\n",
|
||||||
|
array.major_version, array.minor_version, array.patch_version);
|
||||||
|
atime = array.ctime;
|
||||||
|
printf(" Creation Time : %.24s\n", ctime(&atime));
|
||||||
|
printf(" Raid Level : %d\n", array.level);
|
||||||
|
printf(" Size : %d\n", array.size);
|
||||||
|
printf(" Raid Disks : %d\n", array.raid_disks);
|
||||||
|
printf(" Total Disks : %d\n", array.nr_disks);
|
||||||
|
printf("Preferred Minor : %d\n", array.md_minor);
|
||||||
|
printf(" Persistance : Superblock is %spersistant\n",
|
||||||
|
array.not_persistent?"not ":"");
|
||||||
|
printf("\n");
|
||||||
|
atime = array.utime;
|
||||||
|
printf(" Update Time : %.24s\n", ctime(&atime));
|
||||||
|
printf(" State : %s, %serrors\n",
|
||||||
|
(array.state&(1<<MD_SB_CLEAN))?"clean":"dirty",
|
||||||
|
(array.state&(1<<MD_SB_ERRORS))?"":"no-");
|
||||||
|
printf(" Active Drives : %d\n", array.active_disks);
|
||||||
|
printf(" Working Drives : %d\n", array.working_disks);
|
||||||
|
printf(" Failed Drives : %d\n", array.failed_disks);
|
||||||
|
printf(" Spare Drives : %d\n", array.spare_disks);
|
||||||
|
printf("\n");
|
||||||
|
printf(" Layout : %d\n", array.layout);
|
||||||
|
printf(" Chunk Size : %dK\n", array.chunk_size/1024);
|
||||||
|
printf("\n");
|
||||||
|
printf(" Number Major Minor RaidDisk State\n");
|
||||||
|
for (d= 0; d<array.nr_disks; d++) {
|
||||||
|
mdu_disk_info_t disk;
|
||||||
|
disk.number = d;
|
||||||
|
if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
|
||||||
|
fprintf(stderr, "mdctl: cannot get disk detail for disk %d: %s\n",
|
||||||
|
d, strerror(errno));
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
printf(" %5d %5d %5d %5d ",
|
||||||
|
disk.number, disk.major, disk.minor, disk.raid_disk);
|
||||||
|
if (disk.state & (1<<MD_DISK_FAULTY)) printf(" faulty");
|
||||||
|
if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
|
||||||
|
if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
|
||||||
|
if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
|
||||||
|
printf("\n");
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
|
@ -0,0 +1,144 @@
|
||||||
|
/*
|
||||||
|
* mdctl - manage Linux "md" devices aka RAID arrays.
|
||||||
|
*
|
||||||
|
* Copyright (C) 2001 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 "mdctl.h"
|
||||||
|
|
||||||
|
#include "md_u.h"
|
||||||
|
#include "md_p.h"
|
||||||
|
int Examine(char *dev)
|
||||||
|
{
|
||||||
|
|
||||||
|
/* Read the raid superblock from a device and
|
||||||
|
* display important content.
|
||||||
|
*
|
||||||
|
* If cannot be found, print reason: too small, bad magic
|
||||||
|
*
|
||||||
|
* Print:
|
||||||
|
* version, ctime, level, size, raid+spare+
|
||||||
|
* prefered minor
|
||||||
|
* uuid
|
||||||
|
*
|
||||||
|
* utime, state etc
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
int fd = open(dev, O_RDONLY, 0);
|
||||||
|
time_t atime;
|
||||||
|
mdp_super_t super;
|
||||||
|
int d;
|
||||||
|
int rv;
|
||||||
|
|
||||||
|
if (fd < 0) {
|
||||||
|
fprintf(stderr,"mdctl: cannot open %s: %s\n",
|
||||||
|
dev, strerror(errno));
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
rv = load_super(fd, &super);
|
||||||
|
close(fd);
|
||||||
|
switch(rv) {
|
||||||
|
case 1:
|
||||||
|
fprintf(stderr, "mdctl: cannot find device size for %s: %s\n",
|
||||||
|
dev, strerror(errno));
|
||||||
|
return 1;
|
||||||
|
case 2:
|
||||||
|
/* fprintf(stderr, "mdctl: %s is too small for md: size is %ld sectors\n",
|
||||||
|
dev, size);
|
||||||
|
*/
|
||||||
|
fprintf(stderr, "mdctl: %s is too small for md\n",
|
||||||
|
dev);
|
||||||
|
return 1;
|
||||||
|
case 3:
|
||||||
|
fprintf(stderr, "mdctl: Cannot seek to superblock on %s: %s\n",
|
||||||
|
dev, strerror(errno));
|
||||||
|
return 1;
|
||||||
|
case 4:
|
||||||
|
fprintf(stderr, "mdctl: Cannot read superblock on %s\n",
|
||||||
|
dev);
|
||||||
|
return 1;
|
||||||
|
case 5:
|
||||||
|
fprintf(stderr, "mdctl: No super block found on %s (Expected magic %08x, got %08x)\n",
|
||||||
|
dev, MD_SB_MAGIC, super.md_magic);
|
||||||
|
return 1;
|
||||||
|
case 6:
|
||||||
|
fprintf(stderr, "mdctl: Cannot interpret superblock on %s - version is %d\n",
|
||||||
|
dev, super.major_version);
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Ok, its good enough to try, though the checksum could be wrong */
|
||||||
|
printf("%s:\n",dev);
|
||||||
|
printf(" Magic : %08x\n", super.md_magic);
|
||||||
|
printf(" Version : %02d.%02d.%02d\n", super.major_version, super.minor_version,
|
||||||
|
super.patch_version);
|
||||||
|
if (super.minor_version >= 90)
|
||||||
|
printf(" UUID : %08x:%08x:%08x:%08x\n", super.set_uuid0, super.set_uuid1,
|
||||||
|
super.set_uuid2, super.set_uuid3);
|
||||||
|
else
|
||||||
|
printf(" UUID : %08x\n", super.set_uuid0);
|
||||||
|
|
||||||
|
atime = super.ctime;
|
||||||
|
printf(" Creation Time : %.24s\n", ctime(&atime));
|
||||||
|
printf(" Raid Level : %d\n", super.level);
|
||||||
|
printf(" Size : %d\n", super.size);
|
||||||
|
printf(" Raid Disks : %d\n", super.raid_disks);
|
||||||
|
printf(" Total Disks : %d\n", super.nr_disks);
|
||||||
|
printf("Preferred Minor : %d\n", super.md_minor);
|
||||||
|
printf("\n");
|
||||||
|
atime = super.utime;
|
||||||
|
printf(" Update Time : %.24s\n", ctime(&atime));
|
||||||
|
printf(" State : %s, %serrors\n",
|
||||||
|
(super.state&(1<<MD_SB_CLEAN))?"clean":"dirty",
|
||||||
|
(super.state&(1<<MD_SB_ERRORS))?"":"no-");
|
||||||
|
printf(" Active Drives : %d\n", super.active_disks);
|
||||||
|
printf(" Working Drives : %d\n", super.working_disks);
|
||||||
|
printf(" Failed Drives : %d\n", super.failed_disks);
|
||||||
|
printf(" Spare Drives : %d\n", super.spare_disks);
|
||||||
|
printf(" - checksum not checked yet - \n");
|
||||||
|
printf(" Events : %d.%d\n", super.events_hi, super.events_lo);
|
||||||
|
printf("\n");
|
||||||
|
printf(" Layout : %d\n", super.layout);
|
||||||
|
printf(" Chunk Size : %dK\n", super.chunk_size/1024);
|
||||||
|
printf("\n");
|
||||||
|
printf(" Number Major Minor RaidDisk State\n");
|
||||||
|
for (d= -1; d<(signed int)super.nr_disks; d++) {
|
||||||
|
mdp_disk_t *dp;
|
||||||
|
char nb[5];
|
||||||
|
if (d>=0) dp = &super.disks[d];
|
||||||
|
else dp = &super.this_disk;
|
||||||
|
sprintf(nb, "%4d", d);
|
||||||
|
printf("%4s %5d %5d %5d %5d ", d < 0 ? "this" : nb,
|
||||||
|
dp->number, dp->major, dp->minor, dp->raid_disk);
|
||||||
|
if (dp->state & (1<<MD_DISK_FAULTY)) printf(" faulty");
|
||||||
|
if (dp->state & (1<<MD_DISK_ACTIVE)) printf(" active");
|
||||||
|
if (dp->state & (1<<MD_DISK_SYNC)) printf(" sync");
|
||||||
|
if (dp->state & (1<<MD_DISK_REMOVED)) printf(" removed");
|
||||||
|
printf("\n");
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
|
@ -0,0 +1,44 @@
|
||||||
|
#
|
||||||
|
# mdctl - manage Linux "md" devices aka RAID arrays.
|
||||||
|
#
|
||||||
|
# Copyright (C) 2001 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
|
||||||
|
#
|
||||||
|
|
||||||
|
CFLAGS = -Wall,error
|
||||||
|
|
||||||
|
OBJS = mdctl.o config.o ReadMe.o util.o Manage.o Assemble.o Build.o Create.o Detail.o Examine.o
|
||||||
|
all : mdctl
|
||||||
|
|
||||||
|
mdctl : $(OBJS)
|
||||||
|
$(CC) -o mdctl $^
|
||||||
|
|
||||||
|
$(OBJS) : mdctl.h
|
||||||
|
|
||||||
|
clean :
|
||||||
|
rm -f mdctl $(OBJS)
|
||||||
|
|
||||||
|
dist : clean
|
||||||
|
./makedist
|
|
@ -0,0 +1,43 @@
|
||||||
|
/*
|
||||||
|
* mdctl - manage Linux "md" devices aka RAID arrays.
|
||||||
|
*
|
||||||
|
* Copyright (C) 2001 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 "mdctl.h"
|
||||||
|
|
||||||
|
int Manage_ro(char *devname, int fd, int readonly)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
int Manage_runstop(char *devname, int fd, int runstop)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
int Manage_subdevs(char *devname, int fd,
|
||||||
|
int devcnt, char *devnames[], int devmodes[])
|
||||||
|
{
|
||||||
|
}
|
|
@ -0,0 +1,246 @@
|
||||||
|
/*
|
||||||
|
* mdctl - manage Linux "md" devices aka RAID arrays.
|
||||||
|
*
|
||||||
|
* Copyright (C) 2001 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 "mdctl.h"
|
||||||
|
|
||||||
|
char Version[] = "mdctl - v0.2 - 06 June 2001\n";
|
||||||
|
/*
|
||||||
|
* File: ReadMe.c
|
||||||
|
*
|
||||||
|
* This file contains general comments about the implementation
|
||||||
|
* and the various usage messages that can be displayed by mdctl
|
||||||
|
*
|
||||||
|
* mdctl is a single program that can be used to control Linux md devices.
|
||||||
|
* It is intended to provide all the functionality of the mdtools and
|
||||||
|
* raidtools but with a very different interface.
|
||||||
|
* mdctl can perform all functions without a configuration file.
|
||||||
|
* There is the option of using a configuration file, but not in the same
|
||||||
|
* way that raidtools uses one
|
||||||
|
* raidtools uses a configuration file to describe how to create a RAID
|
||||||
|
* array, and also uses this file partially to start a previously
|
||||||
|
* created RAID array. Further, raidtools requires the configuration
|
||||||
|
* file for such things as stopping a raid array which needs to know
|
||||||
|
* nothing about the array.
|
||||||
|
*
|
||||||
|
* The configuration file that can be used by mdctl lists two
|
||||||
|
* different things:
|
||||||
|
* 1/ a mapping from uuid to md device to identify which arrays are
|
||||||
|
* expect and what names (numbers) they should be given
|
||||||
|
* 2/ a list of devices that should be scanned for md sub-devices
|
||||||
|
*
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
* mdctl has 4 major modes of operation:
|
||||||
|
* 1/ Create
|
||||||
|
* This mode is used to create a new array with a superbock
|
||||||
|
* It can progress in several step create-add-add-run
|
||||||
|
* or it can all happen with one command
|
||||||
|
* 2/ Assemble
|
||||||
|
* This mode is used to assemble the parts of a previously created
|
||||||
|
* array into an active array. Components can be explicitly given
|
||||||
|
* or can be searched for. mdctl (optionally) check that the components
|
||||||
|
* do form a bonafide array, and can, on request, fiddle superblock
|
||||||
|
* version numbers so as to assemble a faulty array.
|
||||||
|
* 3/ Build
|
||||||
|
* This is for building legacy arrays without superblocks
|
||||||
|
* 4/ Manage
|
||||||
|
* This is for odd bits an pieces like hotadd, hotremove, setfaulty,
|
||||||
|
* stop, readonly,readwrite
|
||||||
|
* If an array is only partially setup by the Create/Assemble/Build
|
||||||
|
* command, subsequent Manage commands can finish the job.
|
||||||
|
*/
|
||||||
|
|
||||||
|
char short_options[]="-ABCDEhVvc:l:p:n:x:u:c:sarfRSow";
|
||||||
|
struct option long_options[] = {
|
||||||
|
{"manage", 0, 0, '@'},
|
||||||
|
{"assemble", 0, 0, 'A'},
|
||||||
|
{"build", 0, 0, 'B'},
|
||||||
|
{"create", 0, 0, 'C'},
|
||||||
|
{"detail", 0, 0, 'D'},
|
||||||
|
{"examine", 0, 0, 'E'},
|
||||||
|
/* after those will normally come the name of the md device */
|
||||||
|
{"help", 0, 0, 'h'},
|
||||||
|
{"version", 0, 0, 'V'},
|
||||||
|
{"verbose", 0, 0, 'v'},
|
||||||
|
|
||||||
|
/* For create or build: */
|
||||||
|
{"chunk", 1, 0, 'c'},
|
||||||
|
{"rounding", 1, 0, 'c'}, /* for linear, chunk is really a rounding number */
|
||||||
|
{"level", 1, 0, 'l'}, /* 0,1,4,5,linear */
|
||||||
|
{"parity", 1, 0, 'p'}, /* {left,right}-{a,}symetric */
|
||||||
|
{"layout", 1, 0, 'p'},
|
||||||
|
{"raid-disks",1, 0, 'n'},
|
||||||
|
{"spare-disks",1,0, 'x'},
|
||||||
|
|
||||||
|
/* For assemble */
|
||||||
|
{"uuid", 1, 0, 'u'},
|
||||||
|
{"config", 1, 0, 'c'},
|
||||||
|
{"scan", 0, 0, 's'},
|
||||||
|
{"force", 0, 0, 'f'},
|
||||||
|
/* Management */
|
||||||
|
{"add", 0, 0, 'a'},
|
||||||
|
{"remove", 0, 0, 'r'},
|
||||||
|
{"fail", 0, 0, 'f'},
|
||||||
|
{"set-faulty",0, 0, 'f'},
|
||||||
|
{"run", 0, 0, 'R'},
|
||||||
|
{"stop", 0, 0, 'S'},
|
||||||
|
{"readonly", 0, 0, 'o'},
|
||||||
|
{"readwrite", 0, 0, 'w'},
|
||||||
|
|
||||||
|
{0, 0, 0, 0}
|
||||||
|
};
|
||||||
|
|
||||||
|
char Usage[] =
|
||||||
|
"Usage: mdctl --help\n"
|
||||||
|
" for help\n"
|
||||||
|
;
|
||||||
|
|
||||||
|
char Help[] =
|
||||||
|
"Usage: mdctl --create device options...\n"
|
||||||
|
" mdctl --assemble device options...\n"
|
||||||
|
" mdctl --build device options...\n"
|
||||||
|
" mdctl --detail device\n"
|
||||||
|
" mdctl --examine device\n"
|
||||||
|
" mdctl device options...\n"
|
||||||
|
" mdctl is used for controlling Linux md devices (aka RAID arrays)\n"
|
||||||
|
" For detail help on major modes use, e.g.\n"
|
||||||
|
" mdctl --assemble --help\n"
|
||||||
|
"\n"
|
||||||
|
"Any parameter that does not start with '-' is treated as a device name\n"
|
||||||
|
"The first such name is normally the name of an md device. Subsequent\n"
|
||||||
|
"names are names of component devices."
|
||||||
|
"\n"
|
||||||
|
"Available options are:\n"
|
||||||
|
" --create -C : Create a new array\n"
|
||||||
|
" --assemble -A : Assemble an existing array\n"
|
||||||
|
" --build -B : Build a legacy array without superblock\n"
|
||||||
|
" --detail -D : Print detail of a given md array\n"
|
||||||
|
" --examine -E : Print content of md superblock on device\n"
|
||||||
|
" --help -h : This help message or, after above option,\n"
|
||||||
|
" mode specific help message\n"
|
||||||
|
" --version -V : Print version information for mdctl\n"
|
||||||
|
" --verbose -v : Be more verbose about what is happening\n"
|
||||||
|
"\n"
|
||||||
|
" For create or build:\n"
|
||||||
|
" --chunk= -c : chunk size of kibibytes\n"
|
||||||
|
" --rounding= : rounding factor for linear array (==chunck size)\n"
|
||||||
|
" --level= -l : raid level: 0,1,4,5,linear. 0 or linear for build\n"
|
||||||
|
" --paritiy= -p : raid5 parity algorith: {left,right}-{,a}symmetric\n"
|
||||||
|
" --layout= : same as --parity\n"
|
||||||
|
" --raid-disks= -n : number of active devices in array\n"
|
||||||
|
" --spare-disks= -x : number of spares (eXtras) to allow space for\n"
|
||||||
|
"\n"
|
||||||
|
" For assemble:\n"
|
||||||
|
" --uuid= -u : uuid of array to assemble. Devices which don't\n"
|
||||||
|
" have this uuid are excluded\n"
|
||||||
|
" --config= -c : config file\n"
|
||||||
|
" --scan -s : scan config file for missing information\n"
|
||||||
|
" --force -f : Assemble the array even if some superblocks appear out-of-date\n"
|
||||||
|
"\n"
|
||||||
|
" General management:\n"
|
||||||
|
" --add -a : add, or hotadd subsequent devices\n"
|
||||||
|
" --remove -r : remove subsequent devices\n"
|
||||||
|
" --fail -f : mark subsequent devices a faulty\n"
|
||||||
|
" --set-faulty : same as --fail\n"
|
||||||
|
" --run -R : start a partially built array\n"
|
||||||
|
" --stop -S : deactive array, releasing all resources\n"
|
||||||
|
" --readonly -o : mark array as readonly\n"
|
||||||
|
" --readwrite -w : mark array as readwrite\n"
|
||||||
|
;
|
||||||
|
|
||||||
|
|
||||||
|
char Help_create[] =
|
||||||
|
"Usage: mdctl --create device -chunk=X --level=Y --raid-disks=Z devices\n"
|
||||||
|
"\n"
|
||||||
|
" This usage will initialise a new md array and possibly associate some\n"
|
||||||
|
" devices with it. If enough devices are given to complete the array,\n"
|
||||||
|
" the array will be activated. Otherwise it will be left inactive\n"
|
||||||
|
" to be competed and activated by subsequent management commands.\n"
|
||||||
|
"\n"
|
||||||
|
" As devices are added, they are checked to see if they contain\n"
|
||||||
|
" raid superblock or filesystems. They are also check to see if\n"
|
||||||
|
" the variance in device size exceeds 1%.\n"
|
||||||
|
" If any discrepancy is found, the array will not automatically\n"
|
||||||
|
" be run, though the presence of a '--run' can override this\n"
|
||||||
|
" caution.\n"
|
||||||
|
"\n"
|
||||||
|
" The General management options that are valid with --create are:\n"
|
||||||
|
" --run : insist of running the array even if not all devices\n"
|
||||||
|
" are present or some look odd.\n"
|
||||||
|
" --readonly: start the array readonly - not supported yet.\n"
|
||||||
|
"\n"
|
||||||
|
;
|
||||||
|
|
||||||
|
char Help_build[] =
|
||||||
|
"Usage: mdctl --build device -chunk=X --level=Y --raid-disks=Z devices\n"
|
||||||
|
"\n"
|
||||||
|
" This usage is similar to --create. The difference is that it creates\n"
|
||||||
|
" a legacy array with a superblock. With these arrays there is no\n"
|
||||||
|
" different between initially creating the array and subsequently\n"
|
||||||
|
" assembling the array, except that hopefully there is useful data\n"
|
||||||
|
" there in the second case.\n"
|
||||||
|
"\n"
|
||||||
|
" The level may only be 0 or linear.\n"
|
||||||
|
" All devices must be listed and the array will be started once complete.\n"
|
||||||
|
;
|
||||||
|
|
||||||
|
char Help_assemble[] =
|
||||||
|
"Usage: mdctl --assemble device options...\n"
|
||||||
|
" mdctl --assemble --scan options...\n"
|
||||||
|
"\n"
|
||||||
|
"This usage assembles one or more raid arrays from pre-existing\n"
|
||||||
|
"components.\n"
|
||||||
|
"For each array, mdctl needs to know the md device, the uuid, and\n"
|
||||||
|
"a number of sub devices. These can be found in a number of ways.\n"
|
||||||
|
"\n"
|
||||||
|
"The md device is either given before --scan or is found from the\n"
|
||||||
|
"config file. In the latter case, multiple md devices can be started\n"
|
||||||
|
"with a single mdctl command.\n"
|
||||||
|
"\n"
|
||||||
|
"The uuid can be given with the --uuid option, or can be found in\n"
|
||||||
|
"in the config file, or will be taken from the super block on the first\n"
|
||||||
|
"subdevice listed on the command line or in a subsequent --add command.\n"
|
||||||
|
"\n"
|
||||||
|
"Devices can be given on the --assemble command line, on subsequent\n"
|
||||||
|
"'mdctl --add' command lines, or from the config file. Only devices\n"
|
||||||
|
"which have an md superblock which contains the right uuid will be\n"
|
||||||
|
"considered for any device.\n"
|
||||||
|
"\n"
|
||||||
|
"The config file is only used if explicitly named with --config or\n"
|
||||||
|
"requested with --scan. In the later case, '/etc/md.conf' is used.\n"
|
||||||
|
"\n"
|
||||||
|
"If --scan is not given, then the config file will only be used\n"
|
||||||
|
"to find uuids for md arrays.\n"
|
||||||
|
"\n"
|
||||||
|
"The format of the config file is:\n"
|
||||||
|
" not yet documented\n"
|
||||||
|
"\n"
|
||||||
|
;
|
|
@ -0,0 +1,7 @@
|
||||||
|
|
||||||
|
- check superblock checksum in examine
|
||||||
|
- report "chunk" or "rounding" depending on raid level
|
||||||
|
- report "linear" instead of "-1" for raid level
|
||||||
|
- decode ayout depending on raid level
|
||||||
|
- get Assemble to upgrade devices if force flag.
|
||||||
|
- --verbose and --force flags.
|
|
@ -0,0 +1,54 @@
|
||||||
|
/*
|
||||||
|
* mdctl - manage Linux "md" devices aka RAID arrays.
|
||||||
|
*
|
||||||
|
* Copyright (C) 2001 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 "mdctl.h"
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Read the config file
|
||||||
|
*
|
||||||
|
* conf_get_uuids gets a list of devicename+uuid pairs
|
||||||
|
* conf_get_devs gets device names after expanding wildcards
|
||||||
|
*
|
||||||
|
* Each keeps the returned list and frees it when asked to make
|
||||||
|
* a new list.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
char DefaultConfFile[] = "/etc/mdctl.conf";
|
||||||
|
|
||||||
|
mddev_uuid_t conf_get_uuids(char *conffile)
|
||||||
|
{
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
mddev_dev_t conf_get_devs(char *conffile)
|
||||||
|
{
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
|
@ -0,0 +1,20 @@
|
||||||
|
#!/bin/sh
|
||||||
|
|
||||||
|
target=${1-~/public_html/source/mdctl}
|
||||||
|
if [ -d $target ]
|
||||||
|
then :
|
||||||
|
else echo $target is not a directory
|
||||||
|
exit 2
|
||||||
|
fi
|
||||||
|
set `grep '^char Version' ReadMe.c `
|
||||||
|
echo version = $6
|
||||||
|
base=mdctl-$6.tgz
|
||||||
|
if [ -f $target/$base ]
|
||||||
|
then
|
||||||
|
echo $target/$base exists.
|
||||||
|
exit 1
|
||||||
|
fi
|
||||||
|
trap "rm $target/$base; exit" 1 2 3
|
||||||
|
( cd .. ; tar czvf - mdctl ) > $target/$base
|
||||||
|
chmod a+r $target/$base
|
||||||
|
ls -l $target/$base
|
|
@ -0,0 +1,172 @@
|
||||||
|
/*
|
||||||
|
md_p.h : physical layout of Linux RAID devices
|
||||||
|
Copyright (C) 1996-98 Ingo Molnar, Gadi Oxman
|
||||||
|
|
||||||
|
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, or (at your option)
|
||||||
|
any later version.
|
||||||
|
|
||||||
|
You should have received a copy of the GNU General Public License
|
||||||
|
(for example /usr/src/linux/COPYING); if not, write to the Free
|
||||||
|
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef _MD_P_H
|
||||||
|
#define _MD_P_H
|
||||||
|
|
||||||
|
/*
|
||||||
|
* RAID superblock.
|
||||||
|
*
|
||||||
|
* The RAID superblock maintains some statistics on each RAID configuration.
|
||||||
|
* Each real device in the RAID set contains it near the end of the device.
|
||||||
|
* Some of the ideas are copied from the ext2fs implementation.
|
||||||
|
*
|
||||||
|
* We currently use 4096 bytes as follows:
|
||||||
|
*
|
||||||
|
* word offset function
|
||||||
|
*
|
||||||
|
* 0 - 31 Constant generic RAID device information.
|
||||||
|
* 32 - 63 Generic state information.
|
||||||
|
* 64 - 127 Personality specific information.
|
||||||
|
* 128 - 511 12 32-words descriptors of the disks in the raid set.
|
||||||
|
* 512 - 911 Reserved.
|
||||||
|
* 912 - 1023 Disk specific descriptor.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
* If x is the real device size in bytes, we return an apparent size of:
|
||||||
|
*
|
||||||
|
* y = (x & ~(MD_RESERVED_BYTES - 1)) - MD_RESERVED_BYTES
|
||||||
|
*
|
||||||
|
* and place the 4kB superblock at offset y.
|
||||||
|
*/
|
||||||
|
#define MD_RESERVED_BYTES (64 * 1024)
|
||||||
|
#define MD_RESERVED_SECTORS (MD_RESERVED_BYTES / 512)
|
||||||
|
#define MD_RESERVED_BLOCKS (MD_RESERVED_BYTES / BLOCK_SIZE)
|
||||||
|
|
||||||
|
#define MD_NEW_SIZE_SECTORS(x) ((x & ~(MD_RESERVED_SECTORS - 1)) - MD_RESERVED_SECTORS)
|
||||||
|
#define MD_NEW_SIZE_BLOCKS(x) ((x & ~(MD_RESERVED_BLOCKS - 1)) - MD_RESERVED_BLOCKS)
|
||||||
|
|
||||||
|
#define MD_SB_BYTES 4096
|
||||||
|
#define MD_SB_WORDS (MD_SB_BYTES / 4)
|
||||||
|
#define MD_SB_BLOCKS (MD_SB_BYTES / BLOCK_SIZE)
|
||||||
|
#define MD_SB_SECTORS (MD_SB_BYTES / 512)
|
||||||
|
|
||||||
|
/*
|
||||||
|
* The following are counted in 32-bit words
|
||||||
|
*/
|
||||||
|
#define MD_SB_GENERIC_OFFSET 0
|
||||||
|
#define MD_SB_PERSONALITY_OFFSET 64
|
||||||
|
#define MD_SB_DISKS_OFFSET 128
|
||||||
|
#define MD_SB_DESCRIPTOR_OFFSET 992
|
||||||
|
|
||||||
|
#define MD_SB_GENERIC_CONSTANT_WORDS 32
|
||||||
|
#define MD_SB_GENERIC_STATE_WORDS 32
|
||||||
|
#define MD_SB_GENERIC_WORDS (MD_SB_GENERIC_CONSTANT_WORDS + MD_SB_GENERIC_STATE_WORDS)
|
||||||
|
#define MD_SB_PERSONALITY_WORDS 64
|
||||||
|
#define MD_SB_DESCRIPTOR_WORDS 32
|
||||||
|
#define MD_SB_DISKS 27
|
||||||
|
#define MD_SB_DISKS_WORDS (MD_SB_DISKS*MD_SB_DESCRIPTOR_WORDS)
|
||||||
|
#define MD_SB_RESERVED_WORDS (1024 - MD_SB_GENERIC_WORDS - MD_SB_PERSONALITY_WORDS - MD_SB_DISKS_WORDS - MD_SB_DESCRIPTOR_WORDS)
|
||||||
|
#define MD_SB_EQUAL_WORDS (MD_SB_GENERIC_WORDS + MD_SB_PERSONALITY_WORDS + MD_SB_DISKS_WORDS)
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Device "operational" state bits
|
||||||
|
*/
|
||||||
|
#define MD_DISK_FAULTY 0 /* disk is faulty / operational */
|
||||||
|
#define MD_DISK_ACTIVE 1 /* disk is running or spare disk */
|
||||||
|
#define MD_DISK_SYNC 2 /* disk is in sync with the raid set */
|
||||||
|
#define MD_DISK_REMOVED 3 /* disk is in sync with the raid set */
|
||||||
|
|
||||||
|
typedef struct mdp_device_descriptor_s {
|
||||||
|
__u32 number; /* 0 Device number in the entire set */
|
||||||
|
__u32 major; /* 1 Device major number */
|
||||||
|
__u32 minor; /* 2 Device minor number */
|
||||||
|
__u32 raid_disk; /* 3 The role of the device in the raid set */
|
||||||
|
__u32 state; /* 4 Operational state */
|
||||||
|
__u32 reserved[MD_SB_DESCRIPTOR_WORDS - 5];
|
||||||
|
} mdp_disk_t;
|
||||||
|
|
||||||
|
#define MD_SB_MAGIC 0xa92b4efc
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Superblock state bits
|
||||||
|
*/
|
||||||
|
#define MD_SB_CLEAN 0
|
||||||
|
#define MD_SB_ERRORS 1
|
||||||
|
|
||||||
|
typedef struct mdp_superblock_s {
|
||||||
|
/*
|
||||||
|
* Constant generic information
|
||||||
|
*/
|
||||||
|
__u32 md_magic; /* 0 MD identifier */
|
||||||
|
__u32 major_version; /* 1 major version to which the set conforms */
|
||||||
|
__u32 minor_version; /* 2 minor version ... */
|
||||||
|
__u32 patch_version; /* 3 patchlevel version ... */
|
||||||
|
__u32 gvalid_words; /* 4 Number of used words in this section */
|
||||||
|
__u32 set_uuid0; /* 5 Raid set identifier */
|
||||||
|
__u32 ctime; /* 6 Creation time */
|
||||||
|
__u32 level; /* 7 Raid personality */
|
||||||
|
__u32 size; /* 8 Apparent size of each individual disk */
|
||||||
|
__u32 nr_disks; /* 9 total disks in the raid set */
|
||||||
|
__u32 raid_disks; /* 10 disks in a fully functional raid set */
|
||||||
|
__u32 md_minor; /* 11 preferred MD minor device number */
|
||||||
|
__u32 not_persistent; /* 12 does it have a persistent superblock */
|
||||||
|
__u32 set_uuid1; /* 13 Raid set identifier #2 */
|
||||||
|
__u32 set_uuid2; /* 14 Raid set identifier #3 */
|
||||||
|
__u32 set_uuid3; /* 15 Raid set identifier #4 */
|
||||||
|
__u32 gstate_creserved[MD_SB_GENERIC_CONSTANT_WORDS - 16];
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Generic state information
|
||||||
|
*/
|
||||||
|
__u32 utime; /* 0 Superblock update time */
|
||||||
|
__u32 state; /* 1 State bits (clean, ...) */
|
||||||
|
__u32 active_disks; /* 2 Number of currently active disks */
|
||||||
|
__u32 working_disks; /* 3 Number of working disks */
|
||||||
|
__u32 failed_disks; /* 4 Number of failed disks */
|
||||||
|
__u32 spare_disks; /* 5 Number of spare disks */
|
||||||
|
__u32 sb_csum; /* 6 checksum of the whole superblock */
|
||||||
|
#ifdef __BIG_ENDIAN
|
||||||
|
__u32 events_hi; /* 7 high-order of superblock update count */
|
||||||
|
__u32 events_lo; /* 8 low-order of superblock update count */
|
||||||
|
#else
|
||||||
|
__u32 events_lo; /* 7 low-order of superblock update count */
|
||||||
|
__u32 events_hi; /* 8 high-order of superblock update count */
|
||||||
|
#endif
|
||||||
|
__u32 gstate_sreserved[MD_SB_GENERIC_STATE_WORDS - 9];
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Personality information
|
||||||
|
*/
|
||||||
|
__u32 layout; /* 0 the array's physical layout */
|
||||||
|
__u32 chunk_size; /* 1 chunk size in bytes */
|
||||||
|
__u32 root_pv; /* 2 LV root PV */
|
||||||
|
__u32 root_block; /* 3 LV root block */
|
||||||
|
__u32 pstate_reserved[MD_SB_PERSONALITY_WORDS - 4];
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Disks information
|
||||||
|
*/
|
||||||
|
mdp_disk_t disks[MD_SB_DISKS];
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Reserved
|
||||||
|
*/
|
||||||
|
__u32 reserved[MD_SB_RESERVED_WORDS];
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Active descriptor
|
||||||
|
*/
|
||||||
|
mdp_disk_t this_disk;
|
||||||
|
|
||||||
|
} mdp_super_t;
|
||||||
|
|
||||||
|
static inline __u64 md_event(mdp_super_t *sb) {
|
||||||
|
__u64 ev = sb->events_hi;
|
||||||
|
return (ev<<32)| sb->events_lo;
|
||||||
|
}
|
||||||
|
|
||||||
|
#endif
|
||||||
|
|
|
@ -0,0 +1,116 @@
|
||||||
|
/*
|
||||||
|
md_u.h : user <=> kernel API between Linux raidtools and RAID drivers
|
||||||
|
Copyright (C) 1998 Ingo Molnar
|
||||||
|
|
||||||
|
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, or (at your option)
|
||||||
|
any later version.
|
||||||
|
|
||||||
|
You should have received a copy of the GNU General Public License
|
||||||
|
(for example /usr/src/linux/COPYING); if not, write to the Free
|
||||||
|
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef _MD_U_H
|
||||||
|
#define _MD_U_H
|
||||||
|
|
||||||
|
/* ioctls */
|
||||||
|
|
||||||
|
/* status */
|
||||||
|
#define RAID_VERSION _IOR (MD_MAJOR, 0x10, mdu_version_t)
|
||||||
|
#define GET_ARRAY_INFO _IOR (MD_MAJOR, 0x11, mdu_array_info_t)
|
||||||
|
#define GET_DISK_INFO _IOR (MD_MAJOR, 0x12, mdu_disk_info_t)
|
||||||
|
#define PRINT_RAID_DEBUG _IO (MD_MAJOR, 0x13)
|
||||||
|
#define RAID_AUTORUN _IO (MD_MAJOR, 0x14)
|
||||||
|
|
||||||
|
/* configuration */
|
||||||
|
#define CLEAR_ARRAY _IO (MD_MAJOR, 0x20)
|
||||||
|
#define ADD_NEW_DISK _IOW (MD_MAJOR, 0x21, mdu_disk_info_t)
|
||||||
|
#define HOT_REMOVE_DISK _IO (MD_MAJOR, 0x22)
|
||||||
|
#define SET_ARRAY_INFO _IOW (MD_MAJOR, 0x23, mdu_array_info_t)
|
||||||
|
#define SET_DISK_INFO _IO (MD_MAJOR, 0x24)
|
||||||
|
#define WRITE_RAID_INFO _IO (MD_MAJOR, 0x25)
|
||||||
|
#define UNPROTECT_ARRAY _IO (MD_MAJOR, 0x26)
|
||||||
|
#define PROTECT_ARRAY _IO (MD_MAJOR, 0x27)
|
||||||
|
#define HOT_ADD_DISK _IO (MD_MAJOR, 0x28)
|
||||||
|
#define SET_DISK_FAULTY _IO (MD_MAJOR, 0x29)
|
||||||
|
|
||||||
|
/* usage */
|
||||||
|
#define RUN_ARRAY _IOW (MD_MAJOR, 0x30, mdu_param_t)
|
||||||
|
#define START_ARRAY _IO (MD_MAJOR, 0x31)
|
||||||
|
#define STOP_ARRAY _IO (MD_MAJOR, 0x32)
|
||||||
|
#define STOP_ARRAY_RO _IO (MD_MAJOR, 0x33)
|
||||||
|
#define RESTART_ARRAY_RW _IO (MD_MAJOR, 0x34)
|
||||||
|
|
||||||
|
typedef struct mdu_version_s {
|
||||||
|
int major;
|
||||||
|
int minor;
|
||||||
|
int patchlevel;
|
||||||
|
} mdu_version_t;
|
||||||
|
|
||||||
|
typedef struct mdu_array_info_s {
|
||||||
|
/*
|
||||||
|
* Generic constant information
|
||||||
|
*/
|
||||||
|
int major_version;
|
||||||
|
int minor_version;
|
||||||
|
int patch_version;
|
||||||
|
int ctime;
|
||||||
|
int level;
|
||||||
|
int size;
|
||||||
|
int nr_disks;
|
||||||
|
int raid_disks;
|
||||||
|
int md_minor;
|
||||||
|
int not_persistent;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Generic state information
|
||||||
|
*/
|
||||||
|
int utime; /* 0 Superblock update time */
|
||||||
|
int state; /* 1 State bits (clean, ...) */
|
||||||
|
int active_disks; /* 2 Number of currently active disks */
|
||||||
|
int working_disks; /* 3 Number of working disks */
|
||||||
|
int failed_disks; /* 4 Number of failed disks */
|
||||||
|
int spare_disks; /* 5 Number of spare disks */
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Personality information
|
||||||
|
*/
|
||||||
|
int layout; /* 0 the array's physical layout */
|
||||||
|
int chunk_size; /* 1 chunk size in bytes */
|
||||||
|
|
||||||
|
} mdu_array_info_t;
|
||||||
|
|
||||||
|
typedef struct mdu_disk_info_s {
|
||||||
|
/*
|
||||||
|
* configuration/status of one particular disk
|
||||||
|
*/
|
||||||
|
int number;
|
||||||
|
int major;
|
||||||
|
int minor;
|
||||||
|
int raid_disk;
|
||||||
|
int state;
|
||||||
|
|
||||||
|
} mdu_disk_info_t;
|
||||||
|
|
||||||
|
typedef struct mdu_start_info_s {
|
||||||
|
/*
|
||||||
|
* configuration/status of one particular disk
|
||||||
|
*/
|
||||||
|
int major;
|
||||||
|
int minor;
|
||||||
|
int raid_disk;
|
||||||
|
int state;
|
||||||
|
|
||||||
|
} mdu_start_info_t;
|
||||||
|
|
||||||
|
typedef struct mdu_param_s
|
||||||
|
{
|
||||||
|
int personality; /* 1,2,3,4 */
|
||||||
|
int chunk_size; /* in bytes */
|
||||||
|
int max_fault; /* unused for now */
|
||||||
|
} mdu_param_t;
|
||||||
|
|
||||||
|
#endif
|
||||||
|
|
|
@ -0,0 +1,395 @@
|
||||||
|
/*
|
||||||
|
* mdctl - manage Linux "md" devices aka RAID arrays.
|
||||||
|
*
|
||||||
|
* Copyright (C) 2001 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 "mdctl.h"
|
||||||
|
#include "md_p.h"
|
||||||
|
|
||||||
|
int main(int argc, char *argv[])
|
||||||
|
{
|
||||||
|
char mode = '\0';
|
||||||
|
int opt;
|
||||||
|
char *help_text;
|
||||||
|
char *c;
|
||||||
|
int rv;
|
||||||
|
int i;
|
||||||
|
|
||||||
|
int chunk = 0;
|
||||||
|
int level = -10;
|
||||||
|
int layout = -1;
|
||||||
|
int raiddisks = 0;
|
||||||
|
int sparedisks = 0;
|
||||||
|
int uuid[4];
|
||||||
|
int uuidset = 0;
|
||||||
|
char *configfile = NULL;
|
||||||
|
int scan = 0;
|
||||||
|
char devmode = 0;
|
||||||
|
int runstop = 0;
|
||||||
|
int readonly = 0;
|
||||||
|
char *mddev = NULL;
|
||||||
|
char *subdev[MD_SB_DISKS];
|
||||||
|
int devmodes[MD_SB_DISKS];
|
||||||
|
int subdevs = 0;
|
||||||
|
int verbose = 0;
|
||||||
|
int force = 0;
|
||||||
|
|
||||||
|
int mdfd = -1;
|
||||||
|
|
||||||
|
while ((opt=getopt_long(argc, argv,
|
||||||
|
short_options, long_options,
|
||||||
|
NULL)) != -1) {
|
||||||
|
|
||||||
|
switch(opt) {
|
||||||
|
case '@': /* just incase they say --manage */
|
||||||
|
case 'A':
|
||||||
|
case 'B':
|
||||||
|
case 'C':
|
||||||
|
case 'D':
|
||||||
|
case 'E':
|
||||||
|
/* setting mode - only once */
|
||||||
|
if (mode) {
|
||||||
|
fprintf(stderr, "mdctl: --%s/-%c not allowed, mode already set to %s\n",
|
||||||
|
long_options[opt-'A'+1].name,
|
||||||
|
long_options[opt-'A'+1].val,
|
||||||
|
long_options[mode-'A'+1].name);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
mode = opt;
|
||||||
|
continue;
|
||||||
|
|
||||||
|
case 'h':
|
||||||
|
help_text = Help;
|
||||||
|
switch (mode) {
|
||||||
|
case 'C': help_text = Help_create; break;
|
||||||
|
case 'B': help_text = Help_build; break;
|
||||||
|
case 'A': help_text = Help_assemble; break;
|
||||||
|
}
|
||||||
|
fputs(help_text,stderr);
|
||||||
|
exit(0);
|
||||||
|
|
||||||
|
case 'V':
|
||||||
|
fputs(Version, stderr);
|
||||||
|
exit(0);
|
||||||
|
|
||||||
|
case 'v': verbose = 1;
|
||||||
|
continue;
|
||||||
|
|
||||||
|
case 1: /* an undecorated option - must be a device name.
|
||||||
|
* The first device is the "md" device unless scan
|
||||||
|
* has been set or mode is Examine or Detail
|
||||||
|
*/
|
||||||
|
if (mddev == NULL && !scan && mode != 'E' && mode != 'D')
|
||||||
|
mddev = optarg;
|
||||||
|
else {
|
||||||
|
if (subdevs +1 >= MD_SB_DISKS) {
|
||||||
|
fprintf(stderr, "mdctl: too many devices at %s - current limit -s %d\n",
|
||||||
|
optarg, MD_SB_DISKS);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
subdev[subdevs] = optarg;
|
||||||
|
devmodes[subdevs] = devmode;
|
||||||
|
subdevs++;
|
||||||
|
}
|
||||||
|
continue;
|
||||||
|
|
||||||
|
case ':':
|
||||||
|
case '?':
|
||||||
|
fputs(Usage, stderr);
|
||||||
|
exit(2);
|
||||||
|
default:
|
||||||
|
/* force mode setting - @==manage if nothing else */
|
||||||
|
if (!mode) mode = '@';
|
||||||
|
}
|
||||||
|
|
||||||
|
/* We've got a mode, and opt is now something else which
|
||||||
|
* could depend on the mode */
|
||||||
|
#define O(a,b) ((a<<8)|b)
|
||||||
|
switch (O(mode,opt)) {
|
||||||
|
case O('C','c'):
|
||||||
|
case O('B','c'): /* chunk or rounding */
|
||||||
|
if (chunk) {
|
||||||
|
fprintf(stderr, "mdctl: chunk/rounding may only be specified once. "
|
||||||
|
"Second value is %s.\n", optarg);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
chunk = strtol(optarg, &c, 10);
|
||||||
|
if (!optarg[0] || *c) {
|
||||||
|
fprintf(stderr, "mdctl: invalid chunk/rounding value: %s\n",
|
||||||
|
optarg);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
continue;
|
||||||
|
|
||||||
|
case O('C','l'):
|
||||||
|
case O('B','l'): /* set raid level*/
|
||||||
|
if (level != -10) {
|
||||||
|
fprintf(stderr, "mdctl: raid level may only be set once. "
|
||||||
|
"Second value is %s.\n", optarg);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
if (strcmp(optarg,"linear")==0)
|
||||||
|
level = -1;
|
||||||
|
else if (strlen(optarg)==1 && strchr("01245", optarg[0]))
|
||||||
|
level = optarg[0]-'0';
|
||||||
|
else {
|
||||||
|
fprintf(stderr, "mdctl: invalid raid level: %s\n",
|
||||||
|
optarg);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
if (level > 0 && mode == 'B') {
|
||||||
|
fprintf(stderr, "mdctl: Raid level %s not permitted with --build.\n",
|
||||||
|
optarg);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
if (layout >=0 && level < 4) {
|
||||||
|
fprintf(stderr, "mdctl: raid level %s is incompatible with layout setting\n",
|
||||||
|
optarg);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
if (sparedisks > 0 && level < 1) {
|
||||||
|
fprintf(stderr, "mdctl: raid level %s is incompatible with spare-disks setting.\n",
|
||||||
|
optarg);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
continue;
|
||||||
|
|
||||||
|
case O('C','p'): /* raid5 layout */
|
||||||
|
if (layout >= 0) {
|
||||||
|
fprintf(stderr,"mdctl: layout may only be sent once. "
|
||||||
|
"Second value was %s\n", optarg);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
if (level > -10 && level < 4) {
|
||||||
|
fprintf(stderr,"mdctl: layout is incompatible with raid levels below 4.\n");
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
if (strcmp(optarg, "left-symmetric")==0 || strcmp(optarg,"ls")==0)
|
||||||
|
layout = ALGORITHM_LEFT_SYMMETRIC;
|
||||||
|
else if (strcmp(optarg, "left-asymmetric")==0 || strcmp(optarg,"la")==0)
|
||||||
|
layout = ALGORITHM_LEFT_ASYMMETRIC;
|
||||||
|
else if (strcmp(optarg, "right-symmetric")==0 || strcmp(optarg,"rs")==0)
|
||||||
|
layout = ALGORITHM_RIGHT_SYMMETRIC;
|
||||||
|
else if (strcmp(optarg, "right-asymmetric")==0 || strcmp(optarg,"ra")==0)
|
||||||
|
layout = ALGORITHM_RIGHT_ASYMMETRIC;
|
||||||
|
else {
|
||||||
|
fprintf(stderr,"mdctl: %s is not a valid layout value\n",
|
||||||
|
optarg);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
continue;
|
||||||
|
|
||||||
|
case O('C','n'):
|
||||||
|
case O('B','n'): /* number of raid disks */
|
||||||
|
if (raiddisks) {
|
||||||
|
fprintf(stderr, "mdctl: raid-disks set twice: %d and %s\n",
|
||||||
|
raiddisks, optarg);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
raiddisks = strtol(optarg, &c, 10);
|
||||||
|
if (!optarg[0] || *c || raiddisks<=0 || raiddisks > MD_SB_DISKS) {
|
||||||
|
fprintf(stderr, "mdctl: invalid number of raid disks: %s\n",
|
||||||
|
optarg);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
continue;
|
||||||
|
|
||||||
|
case O('C','x'): /* number of spare (eXtra) discs */
|
||||||
|
if (sparedisks) {
|
||||||
|
fprintf(stderr,"mdctl: spare-disks set twice: %d and %s\n",
|
||||||
|
sparedisks, optarg);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
if (level > -10 && level < 1) {
|
||||||
|
fprintf(stderr, "mdctl: spare-disks setting is incompatible with raid level %d\n",
|
||||||
|
level);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
sparedisks = strtol(optarg, &c, 10);
|
||||||
|
if (!optarg[0] || *c || sparedisks < 0 || sparedisks > MD_SB_DISKS - raiddisks) {
|
||||||
|
fprintf(stderr, "mdctl: invalid number of spare disks: %s\n",
|
||||||
|
optarg);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
continue;
|
||||||
|
|
||||||
|
/* now for the Assemble options */
|
||||||
|
case O('A','f'): /* force assembly */
|
||||||
|
force = 1;
|
||||||
|
continue;
|
||||||
|
case O('A','u'): /* uuid of array */
|
||||||
|
if (uuidset) {
|
||||||
|
fprintf(stderr, "mdctl: uuid cannot bet set twice. "
|
||||||
|
"Second value %s.\n", optarg);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
if (parse_uuid(optarg, uuid))
|
||||||
|
uuidset = 1;
|
||||||
|
else {
|
||||||
|
fprintf(stderr,"mdctl: Bad uuid: %s\n", optarg);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
continue;
|
||||||
|
|
||||||
|
case O('A','c'): /* config file */
|
||||||
|
if (configfile) {
|
||||||
|
fprintf(stderr, "mdctl: configfile cannot be set twice. "
|
||||||
|
"Second value is %s.\n", optarg);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
configfile = optarg;
|
||||||
|
/* FIXME possibly check that config file exists. Even parse it */
|
||||||
|
continue;
|
||||||
|
case O('A','s'): /* scan */
|
||||||
|
scan = 1;
|
||||||
|
continue;
|
||||||
|
|
||||||
|
/* now the general management options. Some are applicable
|
||||||
|
* to other modes. None have arguments.
|
||||||
|
*/
|
||||||
|
case O('@','a'):
|
||||||
|
case O('C','a'):
|
||||||
|
case O('B','a'):
|
||||||
|
case O('A','a'): /* add a drive */
|
||||||
|
devmode = 'a';
|
||||||
|
continue;
|
||||||
|
case O('@','r'): /* remove a drive */
|
||||||
|
devmode = 'r';
|
||||||
|
continue;
|
||||||
|
case O('@','f'): /* set faulty */
|
||||||
|
case O('C','f'):
|
||||||
|
devmode = 'f';
|
||||||
|
continue;
|
||||||
|
case O('@','R'):
|
||||||
|
case O('A','R'):
|
||||||
|
case O('B','R'):
|
||||||
|
case O('C','R'): /* Run the array */
|
||||||
|
if (runstop < 0) {
|
||||||
|
fprintf(stderr, "mdctl: Cannot both Stop and Run an array\n");
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
runstop = 1;
|
||||||
|
continue;
|
||||||
|
case O('@','S'):
|
||||||
|
if (runstop > 0) {
|
||||||
|
fprintf(stderr, "mdctl: Cannot both Run and Stop an array\n");
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
runstop = -1;
|
||||||
|
continue;
|
||||||
|
|
||||||
|
case O('@','o'):
|
||||||
|
if (readonly < 0) {
|
||||||
|
fprintf(stderr, "mdctl: Cannot have both readonly and readwrite\n");
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
readonly = 1;
|
||||||
|
continue;
|
||||||
|
case O('@','w'):
|
||||||
|
if (readonly > 0) {
|
||||||
|
fprintf(stderr, "mkdctl: Cannot have both readwrite and readonly.\n");
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
readonly = -1;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
/* We have now processed all the valid options. Anything else is
|
||||||
|
* an error
|
||||||
|
*/
|
||||||
|
fprintf(stderr, "mdctl: option %c not valid in mode %c\n",
|
||||||
|
opt, mode);
|
||||||
|
exit(2);
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!mode) {
|
||||||
|
fputs(Usage, stderr);
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
/* Ok, got the option parsing out of the way
|
||||||
|
* hopefully it's mostly right but there might be some stuff
|
||||||
|
* missing
|
||||||
|
*
|
||||||
|
* That is mosty checked in ther per-mode stuff but...
|
||||||
|
*
|
||||||
|
* There must be an mddev unless D or E or (A and scan)
|
||||||
|
* If there is one, we open it.
|
||||||
|
*/
|
||||||
|
if (mode !='D' && mode !='E' && ! (mode =='A' && scan)) {
|
||||||
|
if (!mddev) {
|
||||||
|
fprintf(stderr, "mdctl: an md device must be given in this mode\n");
|
||||||
|
exit(2);
|
||||||
|
}
|
||||||
|
mdfd = open(mddev, O_RDWR, 0);
|
||||||
|
if (mdfd < 0) {
|
||||||
|
fprintf(stderr,"mdctl: error opening %s: %s\n",
|
||||||
|
mddev, strerror(errno));
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
if (md_get_version(mdfd) <= 0) {
|
||||||
|
fprintf(stderr, "mdctl: %s does not appear to be an md device\n",
|
||||||
|
mddev);
|
||||||
|
close(mdfd);
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
rv =0;
|
||||||
|
switch(mode) {
|
||||||
|
case '@':/* Management */
|
||||||
|
/* readonly, add/remove, readwrite, runstop */
|
||||||
|
if (readonly>1)
|
||||||
|
rv = Manage_ro(mddev, mdfd, readonly);
|
||||||
|
if (!rv && subdevs)
|
||||||
|
rv = Manage_subdevs(mddev, mdfd, subdevs, subdev, devmodes);
|
||||||
|
if (!rv && readonly < 1)
|
||||||
|
rv = Manage_ro(mddev, mdfd, readonly);
|
||||||
|
if (!rv && runstop)
|
||||||
|
rv = Manage_runstop(mddev, mdfd, runstop);
|
||||||
|
break;
|
||||||
|
case 'A': /* Assemble */
|
||||||
|
rv = Assemble(mddev, mdfd, uuid, uuidset, configfile, scan, subdevs, subdev, readonly, runstop, verbose, force);
|
||||||
|
break;
|
||||||
|
case 'B': /* Build */
|
||||||
|
rv = Build(mddev, mdfd, chunk, level, raiddisks, subdevs,subdev);
|
||||||
|
break;
|
||||||
|
case 'C': /* Create */
|
||||||
|
rv = Create(mddev, mdfd, chunk, level, layout, raiddisks, sparedisks,
|
||||||
|
subdevs,subdev,runstop);
|
||||||
|
break;
|
||||||
|
case 'D': /* Detail */
|
||||||
|
for (i=0; i<subdevs; i++)
|
||||||
|
rv |= Detail(subdev[i]);
|
||||||
|
break;
|
||||||
|
case 'E': /* Examine */
|
||||||
|
for (i=0; i<subdevs; i++)
|
||||||
|
rv |= Examine(subdev[i]);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
exit(rv);
|
||||||
|
}
|
||||||
|
|
|
@ -0,0 +1,110 @@
|
||||||
|
/*
|
||||||
|
* mdctl - manage Linux "md" devices aka RAID arrays.
|
||||||
|
*
|
||||||
|
* Copyright (C) 2001 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
|
||||||
|
*/
|
||||||
|
|
||||||
|
#define __USE_LARGEFILE64
|
||||||
|
#include <unistd.h>
|
||||||
|
extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
|
||||||
|
|
||||||
|
#include <sys/types.h>
|
||||||
|
#include <sys/stat.h>
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <time.h>
|
||||||
|
#include <getopt.h>
|
||||||
|
#include <fcntl.h>
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <errno.h>
|
||||||
|
#include <string.h>
|
||||||
|
|
||||||
|
#include <linux/kdev_t.h>
|
||||||
|
#include <linux/fs.h>
|
||||||
|
#include <sys/ioctl.h>
|
||||||
|
#define MD_MAJOR 9
|
||||||
|
|
||||||
|
|
||||||
|
#include "md_u.h"
|
||||||
|
|
||||||
|
extern char short_options[];
|
||||||
|
extern struct option long_options[];
|
||||||
|
extern char Version[], Usage[], Help[], Help_create[], Help_build[], Help_assemble[];
|
||||||
|
|
||||||
|
/* structures read from config file */
|
||||||
|
/* List of mddevice names and uuids */
|
||||||
|
typedef struct mddev_uuid_s {
|
||||||
|
char *devname;
|
||||||
|
__u32 uuid[4];
|
||||||
|
struct mddev_uuid_s *next;
|
||||||
|
} *mddev_uuid_t;
|
||||||
|
|
||||||
|
/* List of device names - wildcards expanded */
|
||||||
|
typedef struct mddev_dev_s {
|
||||||
|
char *devname;
|
||||||
|
struct mddev_dev_s *next;
|
||||||
|
} *mddev_dev_t;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* RAID5 supported algorithms
|
||||||
|
*/
|
||||||
|
#define ALGORITHM_LEFT_ASYMMETRIC 0
|
||||||
|
#define ALGORITHM_RIGHT_ASYMMETRIC 1
|
||||||
|
#define ALGORITHM_LEFT_SYMMETRIC 2
|
||||||
|
#define ALGORITHM_RIGHT_SYMMETRIC 3
|
||||||
|
|
||||||
|
|
||||||
|
extern int Manage_ro(char *devname, int fd, int readonly);
|
||||||
|
extern int Manage_runstop(char *devname, int fd, int runstop);
|
||||||
|
extern int Manage_subdevs(char *devname, int fd,
|
||||||
|
int devcnt, char *devnames[], int devmodes[]);
|
||||||
|
|
||||||
|
|
||||||
|
extern int Assemble(char *mddev, int mdfd,
|
||||||
|
int uuid[4], int uuidset,
|
||||||
|
char *conffile, int scan,
|
||||||
|
int subdevs, char *subdev[],
|
||||||
|
int readonly, int runstop,
|
||||||
|
int verbose, int force);
|
||||||
|
|
||||||
|
extern int Build(char *mddev, int mdfd, int chunk, int level,
|
||||||
|
int raiddisks,
|
||||||
|
int subdevs, char *subdev[]);
|
||||||
|
|
||||||
|
|
||||||
|
extern int Create(char *mddev, int mdfd,
|
||||||
|
int chunk, int level, int layout, int raiddisks, int sparedisks,
|
||||||
|
int subdevs, char *subdev[],
|
||||||
|
int runstop);
|
||||||
|
|
||||||
|
extern int Detail(char *dev);
|
||||||
|
extern int Examine(char *dev);
|
||||||
|
|
||||||
|
extern int md_get_version(int fd);
|
||||||
|
extern int get_linux_version();
|
||||||
|
extern int parse_uuid(char *str, int uuid[4]);
|
||||||
|
|
||||||
|
extern mddev_uuid_t conf_get_uuids(char *);
|
||||||
|
extern mddev_dev_t conf_get_devs(char *);
|
|
@ -0,0 +1,224 @@
|
||||||
|
/*
|
||||||
|
* mdctl - manage Linux "md" devices aka RAID arrays.
|
||||||
|
*
|
||||||
|
* Copyright (C) 2001 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 "mdctl.h"
|
||||||
|
#include "md_p.h"
|
||||||
|
#include <sys/utsname.h>
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Parse a 128 bit uuid in 4 integers
|
||||||
|
* format is 32 hexx nibbles with options :.<space> separator
|
||||||
|
* If not exactly 32 hex digits are found, return 0
|
||||||
|
* else return 1
|
||||||
|
*/
|
||||||
|
int parse_uuid(char *str, int uuid[4])
|
||||||
|
{
|
||||||
|
int hit = 0; /* number of Hex digIT */
|
||||||
|
int i;
|
||||||
|
char c;
|
||||||
|
for (i=0; i<4; i++) uuid[i]=0;
|
||||||
|
|
||||||
|
while ((c= *str++)) {
|
||||||
|
int n;
|
||||||
|
if (c>='0' && c<='9')
|
||||||
|
n = c-'0';
|
||||||
|
else if (c>='a' && c <= 'f')
|
||||||
|
n = 10 + c - 'a';
|
||||||
|
else if (c>='A' && c <= 'F')
|
||||||
|
n = 10 + c - 'A';
|
||||||
|
else if (strchr(":. -", c))
|
||||||
|
continue;
|
||||||
|
else return 0;
|
||||||
|
|
||||||
|
uuid[hit/4] <<= 4;
|
||||||
|
uuid[hit/4] += n;
|
||||||
|
hit++;
|
||||||
|
}
|
||||||
|
if (hit == 32)
|
||||||
|
return 1;
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Get the md version number.
|
||||||
|
* We use the RAID_VERSION ioctl if it is supported
|
||||||
|
* If not, but we have a block device with major '9', we assume
|
||||||
|
* 0.36.0
|
||||||
|
*
|
||||||
|
* Return version number as 24 but number - assume version parts
|
||||||
|
* always < 255
|
||||||
|
*/
|
||||||
|
|
||||||
|
int md_get_version(int fd)
|
||||||
|
{
|
||||||
|
struct stat stb;
|
||||||
|
mdu_version_t vers;
|
||||||
|
|
||||||
|
if (fstat(fd, &stb)<0)
|
||||||
|
return -1;
|
||||||
|
if ((S_IFMT&stb.st_mode) != S_IFBLK)
|
||||||
|
return -1;
|
||||||
|
|
||||||
|
if (ioctl(fd, RAID_VERSION, &vers) == 0)
|
||||||
|
return (vers.major<<16) | (vers.minor<<8) | vers.patchlevel;
|
||||||
|
|
||||||
|
if (MAJOR(stb.st_rdev) == MD_MAJOR)
|
||||||
|
return (36<<8);
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
int get_linux_version()
|
||||||
|
{
|
||||||
|
struct utsname name;
|
||||||
|
int a,b,c;
|
||||||
|
if (uname(&name) <0)
|
||||||
|
return -1;
|
||||||
|
|
||||||
|
if (sscanf(name.release, "%d.%d.%d", &a,&b,&c)!= 3)
|
||||||
|
return -1;
|
||||||
|
return (a<<16)+(b<<8)+c;
|
||||||
|
}
|
||||||
|
|
||||||
|
int enough(int level, int raid_disks, int avail_disks)
|
||||||
|
{
|
||||||
|
switch (level) {
|
||||||
|
case -1:
|
||||||
|
case 0:
|
||||||
|
return avail_disks == raid_disks;
|
||||||
|
case 1:
|
||||||
|
return avail_disks >= 1;
|
||||||
|
case 4:
|
||||||
|
case 5:
|
||||||
|
return avail_disks >= raid_disks-1;
|
||||||
|
default:
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
int same_uuid(int a[4], int b[4])
|
||||||
|
{
|
||||||
|
if (a[0]==b[0] &&
|
||||||
|
a[1]==b[1] &&
|
||||||
|
a[2]==b[2] &&
|
||||||
|
a[3]==b[3])
|
||||||
|
return 1;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
void uuid_from_super(int uuid[4], mdp_super_t *super)
|
||||||
|
{
|
||||||
|
uuid[0] = super->set_uuid0;
|
||||||
|
if (super->minor_version >= 90) {
|
||||||
|
uuid[1] = super->set_uuid1;
|
||||||
|
uuid[2] = super->set_uuid2;
|
||||||
|
uuid[3] = super->set_uuid3;
|
||||||
|
} else {
|
||||||
|
uuid[1] = 0;
|
||||||
|
uuid[2] = 0;
|
||||||
|
uuid[3] = 0;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
int compare_super(mdp_super_t *first, mdp_super_t *second)
|
||||||
|
{
|
||||||
|
/*
|
||||||
|
* return:
|
||||||
|
* 0 same, or first was empty, and second was copied
|
||||||
|
* 1 second had wrong number
|
||||||
|
* 2 wrong uuid
|
||||||
|
* 3 wrong other info
|
||||||
|
*/
|
||||||
|
int uuid1[4], uuid2[4];
|
||||||
|
if (second->md_magic != MD_SB_MAGIC)
|
||||||
|
return 1;
|
||||||
|
if (first-> md_magic != MD_SB_MAGIC) {
|
||||||
|
memcpy(first, second, sizeof(*first));
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
uuid_from_super(uuid1, first);
|
||||||
|
uuid_from_super(uuid2, second);
|
||||||
|
if (!same_uuid(uuid1, uuid2))
|
||||||
|
return 2;
|
||||||
|
if (first->major_version != second->major_version ||
|
||||||
|
first->minor_version != second->minor_version ||
|
||||||
|
first->patch_version != second->patch_version ||
|
||||||
|
first->gvalid_words != second->gvalid_words ||
|
||||||
|
first->ctime != second->ctime ||
|
||||||
|
first->level != second->level ||
|
||||||
|
first->size != second->size ||
|
||||||
|
first->raid_disks != second->raid_disks )
|
||||||
|
return 3;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
int load_super(int fd, mdp_super_t *super)
|
||||||
|
{
|
||||||
|
/* try to read in the superblock
|
||||||
|
*
|
||||||
|
* return
|
||||||
|
* 0 - success
|
||||||
|
* 1 - no block size
|
||||||
|
* 2 - too small
|
||||||
|
* 3 - no seek
|
||||||
|
* 4 - no read
|
||||||
|
* 5 - no magic
|
||||||
|
* 6 - wrong major version
|
||||||
|
*/
|
||||||
|
long size;
|
||||||
|
long long offset;
|
||||||
|
|
||||||
|
if (ioctl(fd, BLKGETSIZE, &size))
|
||||||
|
return 1;
|
||||||
|
|
||||||
|
if (size < MD_RESERVED_SECTORS*2)
|
||||||
|
return 2;
|
||||||
|
|
||||||
|
offset = MD_NEW_SIZE_SECTORS(size);
|
||||||
|
|
||||||
|
offset *= 512;
|
||||||
|
|
||||||
|
if (lseek64(fd, offset, 0)< 0LL)
|
||||||
|
return 3;
|
||||||
|
|
||||||
|
if (read(fd, &super, sizeof(super)) != sizeof(super))
|
||||||
|
return 4;
|
||||||
|
|
||||||
|
if (super->md_magic != MD_SB_MAGIC)
|
||||||
|
return 5;
|
||||||
|
|
||||||
|
if (super->major_version != 0)
|
||||||
|
return 6;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
Loading…
Reference in New Issue