| /* |
| * mdadm - manage Linux "md" devices aka RAID arrays. |
| * |
| * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de> |
| * |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| * Author: Neil Brown |
| * Email: <neilb@cse.unsw.edu.au> |
| * Paper: Neil Brown |
| * School of Computer Science and Engineering |
| * The University of New South Wales |
| * Sydney, 2052 |
| * Australia |
| */ |
| |
| #include "mdadm.h" |
| #include "md_u.h" |
| #include "md_p.h" |
| |
| #define REGISTER_DEV _IO (MD_MAJOR, 1) |
| #define START_MD _IO (MD_MAJOR, 2) |
| #define STOP_MD _IO (MD_MAJOR, 3) |
| |
| int Manage_ro(char *devname, int fd, int readonly) |
| { |
| /* switch to readonly or rw |
| * |
| * requires >= 0.90.0 |
| * first check that array is runing |
| * use RESTART_ARRAY_RW or STOP_ARRAY_RO |
| * |
| */ |
| mdu_array_info_t array; |
| |
| if (md_get_version(fd) < 9000) { |
| fprintf(stderr, Name ": need md driver version 0.90.0 or later\n"); |
| return 1; |
| } |
| if (ioctl(fd, GET_ARRAY_INFO, &array)) { |
| fprintf(stderr, Name ": %s does not appear to be active.\n", |
| devname); |
| return 1; |
| } |
| |
| if (readonly>0) { |
| if (ioctl(fd, STOP_ARRAY_RO, NULL)) { |
| fprintf(stderr, Name ": failed to set readonly for %s: %s\n", |
| devname, strerror(errno)); |
| return 1; |
| } |
| } else if (readonly < 0) { |
| if (ioctl(fd, RESTART_ARRAY_RW, NULL)) { |
| fprintf(stderr, Name ": failed to set writable for %s: %s\n", |
| devname, strerror(errno)); |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| int Manage_runstop(char *devname, int fd, int runstop, int quiet) |
| { |
| /* Run or stop the array. array must already be configured |
| * required >= 0.90.0 |
| */ |
| mdu_param_t param; /* unused */ |
| |
| if (runstop == -1 && md_get_version(fd) < 9000) { |
| if (ioctl(fd, STOP_MD, 0)) { |
| if (!quiet) fprintf(stderr, Name ": stopping device %s failed: %s\n", |
| devname, strerror(errno)); |
| return 1; |
| } |
| } |
| |
| if (md_get_version(fd) < 9000) { |
| fprintf(stderr, Name ": need md driver version 0.90.0 or later\n"); |
| return 1; |
| } |
| /* |
| if (ioctl(fd, GET_ARRAY_INFO, &array)) { |
| fprintf(stderr, Name ": %s does not appear to be active.\n", |
| devname); |
| return 1; |
| } |
| */ |
| if (runstop>0) { |
| if (ioctl(fd, RUN_ARRAY, ¶m)) { |
| fprintf(stderr, Name ": failed to run array %s: %s\n", |
| devname, strerror(errno)); |
| return 1; |
| } |
| } else if (runstop < 0){ |
| if (ioctl(fd, STOP_ARRAY, NULL)) { |
| if (quiet==0) |
| fprintf(stderr, Name ": fail to stop array %s: %s\n", |
| devname, strerror(errno)); |
| return 1; |
| } |
| if (quiet <= 0) |
| fprintf(stderr, Name ": stopped %s\n", devname); |
| } |
| return 0; |
| } |
| |
| int Manage_resize(char *devname, int fd, long long size, int raid_disks) |
| { |
| mdu_array_info_t info; |
| if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) { |
| fprintf(stderr, Name ": Cannot get array information for %s: %s\n", |
| devname, strerror(errno)); |
| return 1; |
| } |
| if (size >= 0) |
| info.size = size; |
| if (raid_disks > 0) |
| info.raid_disks = raid_disks; |
| if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) { |
| fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n", |
| devname, strerror(errno)); |
| return 1; |
| } |
| return 0; |
| } |
| |
| int Manage_reconfig(char *devname, int fd, int layout) |
| { |
| mdu_array_info_t info; |
| if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) { |
| fprintf(stderr, Name ": Cannot get array information for %s: %s\n", |
| devname, strerror(errno)); |
| return 1; |
| } |
| info.layout = layout; |
| printf("layout set to %d\n", info.layout); |
| if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) { |
| fprintf(stderr, Name ": Cannot set layout for %s: %s\n", |
| devname, strerror(errno)); |
| return 1; |
| } |
| return 0; |
| } |
| |
| int Manage_subdevs(char *devname, int fd, |
| mddev_dev_t devlist, int verbose) |
| { |
| /* do something to each dev. |
| * devmode can be |
| * 'a' - add the device |
| * try HOT_ADD_DISK |
| * If that fails EINVAL, try ADD_NEW_DISK |
| * 'r' - remove the device HOT_REMOVE_DISK |
| * 'f' - set the device faulty SET_DISK_FAULTY |
| */ |
| mdu_array_info_t array; |
| mdu_disk_info_t disc; |
| mddev_dev_t dv; |
| struct stat stb; |
| int j; |
| int tfd; |
| struct supertype *st; |
| void *dsuper = NULL; |
| void *osuper = NULL; /* original super */ |
| int duuid[4]; |
| int ouuid[4]; |
| |
| if (ioctl(fd, GET_ARRAY_INFO, &array)) { |
| fprintf(stderr, Name ": cannot get array info for %s\n", |
| devname); |
| return 1; |
| } |
| for (dv = devlist ; dv; dv=dv->next) { |
| if (stat(dv->devname, &stb)) { |
| fprintf(stderr, Name ": cannot find %s: %s\n", |
| dv->devname, strerror(errno)); |
| return 1; |
| } |
| if ((stb.st_mode & S_IFMT) != S_IFBLK) { |
| fprintf(stderr, Name ": %s is not a block device.\n", |
| dv->devname); |
| return 1; |
| } |
| switch(dv->disposition){ |
| default: |
| fprintf(stderr, Name ": internal error - devmode[%s]=%d\n", |
| dv->devname, dv->disposition); |
| return 1; |
| case 'a': |
| /* add the device - hot or cold */ |
| st = super_by_version(array.major_version, |
| array.minor_version); |
| if (!st) { |
| fprintf(stderr, Name ": unsupport array - version %d.%d\n", |
| array.major_version, array.minor_version); |
| return 1; |
| } |
| |
| /* Make sure it isn't in use (in 2.6 or later) */ |
| tfd = open(dv->devname, O_RDONLY|O_EXCL); |
| if (tfd < 0) { |
| fprintf(stderr, Name ": Cannot open %s: %s\n", |
| dv->devname, strerror(errno)); |
| return 1; |
| } |
| if (array.not_persistent==0) |
| st->ss->load_super(st, tfd, &osuper, NULL); |
| /* will use osuper later */ |
| close(tfd); |
| |
| if (array.major_version == 0 && |
| md_get_version(fd)%100 < 2) { |
| if (ioctl(fd, HOT_ADD_DISK, |
| (unsigned long)stb.st_rdev)==0) { |
| if (verbose >= 0) |
| fprintf(stderr, Name ": hot added %s\n", |
| dv->devname); |
| continue; |
| } |
| |
| fprintf(stderr, Name ": hot add failed for %s: %s\n", |
| dv->devname, strerror(errno)); |
| return 1; |
| } |
| |
| if (array.not_persistent == 0) { |
| |
| /* need to find a sample superblock to copy, and |
| * a spare slot to use |
| */ |
| for (j=0; j<st->max_devs; j++) { |
| char *dev; |
| int dfd; |
| disc.number = j; |
| if (ioctl(fd, GET_DISK_INFO, &disc)) |
| continue; |
| if (disc.major==0 && disc.minor==0) |
| continue; |
| if ((disc.state & 4)==0) continue; /* sync */ |
| /* Looks like a good device to try */ |
| dev = map_dev(disc.major, disc.minor, 1); |
| if (!dev) continue; |
| dfd = dev_open(dev, O_RDONLY); |
| if (dfd < 0) continue; |
| if (st->ss->load_super(st, dfd, &dsuper, NULL)) { |
| close(dfd); |
| continue; |
| } |
| close(dfd); |
| break; |
| } |
| if (!dsuper) { |
| fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n"); |
| return 1; |
| } |
| /* Possibly this device was recently part of the array |
| * and was temporarily removed, and is now being re-added. |
| * If so, we can simply re-add it. |
| */ |
| st->ss->uuid_from_super(duuid, dsuper); |
| |
| if (osuper) { |
| st->ss->uuid_from_super(ouuid, osuper); |
| if (memcmp(duuid, ouuid, sizeof(ouuid))==0) { |
| /* look close enough for now. Kernel |
| * will worry about where a bitmap |
| * based reconstruct is possible |
| */ |
| struct mdinfo mdi; |
| st->ss->getinfo_super(&mdi, osuper); |
| disc.major = major(stb.st_rdev); |
| disc.minor = minor(stb.st_rdev); |
| disc.number = mdi.disk.number; |
| disc.raid_disk = mdi.disk.raid_disk; |
| disc.state = mdi.disk.state; |
| if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) { |
| if (verbose >= 0) |
| fprintf(stderr, Name ": re-added %s\n", dv->devname); |
| continue; |
| } |
| /* fall back on normal-add */ |
| } |
| } |
| } |
| for (j=0; j< st->max_devs; j++) { |
| disc.number = j; |
| if (ioctl(fd, GET_DISK_INFO, &disc)) |
| break; |
| if (disc.major==0 && disc.minor==0) |
| break; |
| if (disc.state & 8) /* removed */ |
| break; |
| } |
| disc.major = major(stb.st_rdev); |
| disc.minor = minor(stb.st_rdev); |
| disc.number =j; |
| disc.state = 0; |
| if (array.not_persistent==0) { |
| if (dv->writemostly) |
| disc.state |= 1 << MD_DISK_WRITEMOSTLY; |
| st->ss->add_to_super(dsuper, &disc); |
| if (st->ss->write_init_super(st, dsuper, &disc, dv->devname)) |
| return 1; |
| } else if (dv->re_add) { |
| /* this had better be raid1. |
| * As we are "--re-add"ing we must find a spare slot |
| * to fill. |
| */ |
| char *used = malloc(array.raid_disks); |
| memset(used, 0, array.raid_disks); |
| for (j=0; j< st->max_devs; j++) { |
| mdu_disk_info_t disc2; |
| disc2.number = j; |
| if (ioctl(fd, GET_DISK_INFO, &disc2)) |
| continue; |
| if (disc2.major==0 && disc2.minor==0) |
| continue; |
| if (disc2.state & 8) /* removed */ |
| continue; |
| if (disc2.raid_disk < 0) |
| continue; |
| if (disc2.raid_disk > array.raid_disks) |
| continue; |
| used[disc2.raid_disk] = 1; |
| } |
| for (j=0 ; j<array.raid_disks; j++) |
| if (!used[j]) { |
| disc.raid_disk = j; |
| disc.state |= (1<<MD_DISK_SYNC); |
| break; |
| } |
| } |
| if (dv->writemostly) |
| disc.state |= (1 << MD_DISK_WRITEMOSTLY); |
| if (ioctl(fd,ADD_NEW_DISK, &disc)) { |
| fprintf(stderr, Name ": add new device failed for %s as %d: %s\n", |
| dv->devname, j, strerror(errno)); |
| return 1; |
| } |
| if (verbose >= 0) |
| fprintf(stderr, Name ": added %s\n", dv->devname); |
| break; |
| |
| case 'r': |
| /* hot remove */ |
| /* FIXME check that it is a current member */ |
| if (ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev)) { |
| fprintf(stderr, Name ": hot remove failed for %s: %s\n", |
| dv->devname, strerror(errno)); |
| return 1; |
| } |
| if (verbose >= 0) |
| fprintf(stderr, Name ": hot removed %s\n", dv->devname); |
| break; |
| |
| case 'f': /* set faulty */ |
| /* FIXME check current member */ |
| if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) { |
| fprintf(stderr, Name ": set device faulty failed for %s: %s\n", |
| dv->devname, strerror(errno)); |
| return 1; |
| } |
| if (verbose >= 0) |
| fprintf(stderr, Name ": set %s faulty in %s\n", |
| dv->devname, devname); |
| break; |
| } |
| } |
| return 0; |
| |
| } |
