--- /dev/null
+/*
+ * 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 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)
+{
+ /*
+ * The task of Assemble is to submit a
+ * SET_ARRAY_INFO ioctl with no arg - to prepare
+ * the array - and then submit a number of
+ * ADD_NEW_DISK ioctls to add disks into
+ * the array. Finally RUN_ARRAY might
+ * be submitted to start the array.
+ *
+ * Much of the work of Assemble is in finding and/or
+ * checking the disks to make sure they look right.
+ *
+ * If mddev is not set, then scan must be and we
+ * read through the config file for dev+uuid mapping
+ * We recurse, setting mddev, for each device that
+ * - isn't running
+ * - has a valid uuid (or any uuid if !uuidset
+ *
+ * If mddev is set, we try to determine state of md.
+ * check version - must be at least 0.90.0
+ * check kernel version. must be at least 2.4.
+ * If not, we can possibly fall back on START_ARRAY
+ * Try to GET_ARRAY_INFO.
+ * If possible, give up
+ * If not, try to STOP_ARRAY just to make sure
+ *
+ * If !uuidset and scan, look in conf-file for uuid
+ * If not found, give up
+ * If !subdevs and scan and uuidset, get list of devs from conf-file
+ *
+ * For each device:
+ * Check superblock - discard if bad
+ * Check uuid (set if we don't have one) - discard if no match
+ * Check superblock similarity if we have a superbloc - discard if different
+ * Record events, devicenum, utime
+ * This should give us a list of devices for the array
+ * We should collect the most recent event and utime numbers
+ *
+ * Count disks with recent enough event count
+ * While force && !enough disks
+ * Choose newest rejected disks, update event count
+ * mark clean and rewrite superblock
+ * If recent kernel:
+ * SET_ARRAY_INFO
+ * foreach device with recent events : ADD_NEW_DISK
+ * if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY
+ * If old kernel:
+ * Check the device numbers in superblock are right
+ * update superblock if any changes
+ * START_ARRAY
+ *
+ */
+ int old_linux = 0;
+ int vers;
+ mdu_array_info_t array;
+ mddev_dev_t devlist = NULL;
+ mdp_super_t first_super, super;
+ struct {
+ char *devname;
+ int major, minor;
+ long long events;
+ time_t utime;
+ int uptodate;
+ } devices[MD_SB_DISKS];
+ int best[MD_SB_DISKS]; /* indexed by raid_disk */
+ int devcnt = 0, okcnt;
+ int i;
+ int most_recent = 0;
+
+ if (!mddev && !scan) {
+ fputs("mdctl: internal error - Assemble called with no devie or scan\n", stderr);
+ return 1;
+ }
+ if (!mddev) {
+ mddev_uuid_t device_list;
+ int found = 0;
+ device_list = conf_get_uuids(conffile);
+ if (!device_list) {
+ fprintf(stderr, "mdctl: No devices found in config file\n");
+ return 1;
+ }
+ while (device_list) {
+ if (!uuidset || same_uuid(device_list->uuid,uuid)) {
+ mdfd = open(device_list->devname, O_RDONLY, 0);
+ if (mdfd < 0) {
+ fprintf(stderr,
+ "mdctl: error opening %s: %s\n",
+ device_list->devname,
+ strerror(errno));
+ continue;
+ }
+ if (Assemble(device_list->devname, mdfd,
+ device_list->uuid, 1,
+ conffile, 1,
+ subdevs, subdev,
+ readonly, runstop, verbose, force)==0)
+ found++;
+ close(mdfd);
+ }
+ device_list = device_list->next;
+ }
+ if (found)
+ return 0;
+ fprintf(stderr,"mdctl: Did not successful Assemble any devices\n");
+ return 1;
+ }
+
+ /*
+ * Ok, we have an mddev, check it out
+ */
+ vers = md_get_version(mdfd);
+ if (vers <= 0) {
+ fprintf(stderr, "mdctl: %s appears not to be an md device.\n");
+ return 1;
+ }
+ if (vers < (90<<8)) {
+ fprintf(stderr, "mdctl: Assemble requires driver version 0.90.0 or later.\n"
+ " Upgrade your kernel or try --Build\n");
+ return 1;
+ }
+ if (get_linux_version() < 0x020400)
+ old_linux = 1;
+
+ if (ioctl(mdfd, GET_ARRAY_INFO, &array)>=0) {
+ fprintf(stderr, "mdctl: device %s already active - cannot assemble it\n",
+ mddev);
+ return 1;
+ }
+ ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */
+
+ /*
+ * We have a valid mddev, check out uuid
+ */
+ if (!uuidset && scan) {
+ /* device must be listed with uuid in conf file */
+ mddev_uuid_t device_list;
+ device_list = conf_get_uuids(conffile);
+ while (device_list &&
+ strcmp(device_list->devname, mddev) != 0)
+ device_list = device_list->next;
+
+ if (!device_list) {
+ fprintf(stderr, "mdctl: --scan set and no uuid found for %s in config file.\n",
+ mddev);
+ return 1;
+ }
+ /* the uuid is safe until next call to conf_get_uuids */
+ uuid = device_list->uuid;
+ uuidset = 1;
+ }
+
+ /* Now to start looking at devices.
+ * If no devices were given, but a uuid is available and
+ * --scan was set, then we should scan all devices listed in the
+ * config file
+ *
+ */
+ if (subdevs==0 && scan && uuidset)
+ devlist = conf_get_devs(conffile);
+
+ if (subdevs == 0 && devlist == NULL) {
+ fprintf(stderr, "mdctl: no devices given for %s\n", mddev);
+ return 1;
+ }
+ /* now for each device */
+ first_super.md_magic = 0;
+ for (i=0; i<MD_SB_DISKS; i++)
+ best[i] = -1;
+
+ while (subdevs || devlist) {
+ char *devname;
+ int this_uuid[4];
+ int dfd;
+ struct stat stb;
+ int inargv;
+ if (subdevs) {
+ devname = *subdev++;
+ subdevs--;
+ inargv=1;
+ } else {
+ devname = devlist->devname;
+ devlist = devlist->next;
+ inargv=0;
+ }
+
+ dfd = open(devname, O_RDONLY, 0);
+ if (dfd < 0) {
+ if (inargv || verbose)
+ fprintf(stderr, "mdctl: cannot open device %s: %s\n",
+ devname, strerror(errno));
+ continue;
+ }
+ if (fstat(dfd, &stb)< 0) {
+ /* Impossible! */
+ fprintf(stderr, "mdctl: fstat failed for %s: %s\n",
+ devname, strerror(errno));
+ close(dfd);
+ continue;
+ }
+ if ((stb.st_mode & S_IFMT) != S_IFBLK) {
+ fprintf(stderr, "mdctl: %d is not a block device.\n",
+ devname);
+ close(dfd);
+ continue;
+ }
+ if (load_super(dfd, &super)) {
+ if (inargv || verbose)
+ fprintf( stderr, "mdctl: no RAID superblock on %s\n",
+ devname);
+ close(dfd);
+ continue;
+ }
+ close(dfd);
+ if (compare_super(&first_super, &super)) {
+ if (inargv || verbose)
+ fprintf(stderr, "mdctl: superblock on %s doesn't match\n",
+ devname);
+ continue;
+ }
+ if (uuidset) {
+ uuid_from_super(this_uuid, &first_super);
+ if (!same_uuid(this_uuid, uuid)) {
+ if (inargv || verbose)
+ fprintf(stderr, "mdctl: %s has wrong uuid.\n",
+ devname);
+ continue;
+ }
+ } else {
+ uuid_from_super(uuid, &first_super);
+ uuidset = 1;
+ }
+
+ /* Ok, this one is at least worth considering */
+ if (devcnt >= MD_SB_DISKS) {
+ fprintf(stderr, "mdctl: ouch - too many devices appear to be in this array. Ignoring %s\n",
+ devname);
+ continue;
+ }
+ devices[devcnt].devname = devname;
+ devices[devcnt].major = MAJOR(stb.st_rdev);
+ devices[devcnt].minor = MINOR(stb.st_rdev);
+ devices[devcnt].events = md_event(&super);
+ devices[devcnt].utime = super.utime;
+ devices[devcnt].uptodate = 0;
+ if (most_recent < devcnt) {
+ if (devices[devcnt].events
+ > devices[most_recent].events)
+ most_recent = devcnt;
+ }
+ i = super.this_disk.raid_disk;
+ if (best[i] == -1
+ || devices[best[i]].events < devices[devcnt].events) {
+ best[i] = devcnt;
+ }
+ 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;
+ }
+}
--- /dev/null
+/*
+ * 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[])
+{
+}
--- /dev/null
+/*
+ * 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)
+{
+}
--- /dev/null
+/*
+ * 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;
+}
--- /dev/null
+/*
+ * 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;
+}
--- /dev/null
+#
+# 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
--- /dev/null
+/*
+ * 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[])
+{
+}
--- /dev/null
+/*
+ * 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"
+;
--- /dev/null
+
+- 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.
\ No newline at end of file
--- /dev/null
+/*
+ * 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;
+}
+
--- /dev/null
+#!/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
\ No newline at end of file
--- /dev/null
+/*
+ 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
+
--- /dev/null
+/*
+ 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
+
--- /dev/null
+/*
+ * 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);
+}
+
--- /dev/null
+/*
+ * 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 *);
--- /dev/null
+/*
+ * 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;
+}
+
projects / thirdparty / mdadm.git / commitdiff
