The code for moving spares around a spare-group currently only works for 0.90 metadata. Generalise it for 1.x metadata as well. Reported-by: "Garth Snyder" <garth@grsweb.us> Signed-off-by NeilBrown <neilb@suse.de>
556 lines
14 KiB
C
556 lines
14 KiB
C
/*
|
|
* 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;
|
|
}
|
|
|
|
#ifndef MDASSEMBLE
|
|
|
|
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;
|
|
}
|
|
if (quiet <= 0)
|
|
fprintf(stderr, Name ": started %s\n", devname);
|
|
} else if (runstop < 0){
|
|
struct map_ent *map = NULL;
|
|
struct stat stb;
|
|
if (ioctl(fd, STOP_ARRAY, NULL)) {
|
|
if (quiet==0) {
|
|
fprintf(stderr, Name ": fail to stop array %s: %s\n",
|
|
devname, strerror(errno));
|
|
if (errno == EBUSY)
|
|
fprintf(stderr, "Perhaps a running "
|
|
"process, mounted filesystem "
|
|
"or active volume group?\n");
|
|
}
|
|
return 1;
|
|
}
|
|
if (quiet <= 0)
|
|
fprintf(stderr, Name ": stopped %s\n", devname);
|
|
if (fstat(fd, &stb) == 0) {
|
|
int devnum;
|
|
if (major(stb.st_rdev) == MD_MAJOR)
|
|
devnum = minor(stb.st_rdev);
|
|
else
|
|
devnum = -1-(minor(stb.st_rdev)>>6);
|
|
map_delete(&map, devnum);
|
|
map_write(map);
|
|
map_free(map);
|
|
}
|
|
}
|
|
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
|
|
* device can be 'faulty' or 'detached' in which case all
|
|
* matching devices are removed.
|
|
* 'f' - set the device faulty SET_DISK_FAULTY
|
|
* device can be 'detached' in which case any device that
|
|
* is inaccessible will be marked faulty.
|
|
*/
|
|
mdu_array_info_t array;
|
|
mdu_disk_info_t disc;
|
|
unsigned long long array_size;
|
|
mddev_dev_t dv, next = NULL;
|
|
struct stat stb;
|
|
int j, jnext = 0;
|
|
int tfd;
|
|
struct supertype *st, *tst;
|
|
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;
|
|
}
|
|
|
|
/* array.size is only 32 bit and may be truncated.
|
|
* So read from sysfs if possible, and record number of sectors
|
|
*/
|
|
|
|
array_size = get_component_size(fd);
|
|
if (array_size <= 0)
|
|
array_size = array.size * 2;
|
|
|
|
tst = super_by_fd(fd);
|
|
if (!tst) {
|
|
fprintf(stderr, Name ": unsupport array - version %d.%d\n",
|
|
array.major_version, array.minor_version);
|
|
return 1;
|
|
}
|
|
|
|
for (dv = devlist, j=0 ; dv; dv = next, j = jnext) {
|
|
unsigned long long ldsize;
|
|
char dvname[20];
|
|
char *dnprintable = dv->devname;
|
|
|
|
next = dv->next;
|
|
jnext = 0;
|
|
|
|
if (strcmp(dv->devname, "failed")==0 ||
|
|
strcmp(dv->devname, "faulty")==0) {
|
|
if (dv->disposition != 'r') {
|
|
fprintf(stderr, Name ": %s only meaningful "
|
|
"with -r, not -%c\n",
|
|
dv->devname, dv->disposition);
|
|
return 1;
|
|
}
|
|
for (; j < array.raid_disks + array.nr_disks ; j++) {
|
|
disc.number = j;
|
|
if (ioctl(fd, GET_DISK_INFO, &disc))
|
|
continue;
|
|
if (disc.major == 0 && disc.minor == 0)
|
|
continue;
|
|
if ((disc.state & 1) == 0) /* faulty */
|
|
continue;
|
|
stb.st_rdev = makedev(disc.major, disc.minor);
|
|
next = dv;
|
|
jnext = j+1;
|
|
sprintf(dvname,"%d:%d", disc.major, disc.minor);
|
|
dnprintable = dvname;
|
|
break;
|
|
}
|
|
if (jnext == 0)
|
|
continue;
|
|
} else if (strcmp(dv->devname, "detached") == 0) {
|
|
if (dv->disposition != 'r' && dv->disposition != 'f') {
|
|
fprintf(stderr, Name ": %s only meaningful "
|
|
"with -r of -f, not -%c\n",
|
|
dv->devname, dv->disposition);
|
|
return 1;
|
|
}
|
|
for (; j < array.raid_disks + array.nr_disks; j++) {
|
|
int sfd;
|
|
disc.number = j;
|
|
if (ioctl(fd, GET_DISK_INFO, &disc))
|
|
continue;
|
|
if (disc.major == 0 && disc.minor == 0)
|
|
continue;
|
|
sprintf(dvname,"%d:%d", disc.major, disc.minor);
|
|
sfd = dev_open(dvname, O_RDONLY);
|
|
if (sfd >= 0) {
|
|
close(sfd);
|
|
continue;
|
|
}
|
|
if (dv->disposition == 'f' &&
|
|
(disc.state & 1) == 1) /* already faulty */
|
|
continue;
|
|
if (errno != ENXIO)
|
|
continue;
|
|
stb.st_rdev = makedev(disc.major, disc.minor);
|
|
next = dv;
|
|
jnext = j+1;
|
|
dnprintable = dvname;
|
|
break;
|
|
}
|
|
if (jnext == 0)
|
|
continue;
|
|
} else {
|
|
j = 0;
|
|
|
|
tfd = dev_open(dv->devname, O_RDONLY);
|
|
if (tfd < 0 || fstat(tfd, &stb) != 0) {
|
|
fprintf(stderr, Name ": cannot find %s: %s\n",
|
|
dv->devname, strerror(errno));
|
|
if (tfd >= 0)
|
|
close(tfd);
|
|
return 1;
|
|
}
|
|
close(tfd);
|
|
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 */
|
|
|
|
/* Make sure it isn't in use (in 2.6 or later) */
|
|
tfd = dev_open(dv->devname, O_RDONLY|O_EXCL);
|
|
if (tfd < 0) {
|
|
fprintf(stderr, Name ": Cannot open %s: %s\n",
|
|
dv->devname, strerror(errno));
|
|
return 1;
|
|
}
|
|
remove_partitions(tfd);
|
|
|
|
st = dup_super(tst);
|
|
|
|
if (array.not_persistent==0)
|
|
st->ss->load_super(st, tfd, NULL);
|
|
|
|
if (!get_dev_size(tfd, dv->devname, &ldsize)) {
|
|
close(tfd);
|
|
return 1;
|
|
}
|
|
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 < tst->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 (tst->ss->load_super(tst, dfd,
|
|
NULL)) {
|
|
close(dfd);
|
|
continue;
|
|
}
|
|
close(dfd);
|
|
break;
|
|
}
|
|
if (!tst->sb) {
|
|
fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n");
|
|
return 1;
|
|
}
|
|
|
|
/* Make sure device is large enough */
|
|
if (tst->ss->avail_size(tst, ldsize/512) <
|
|
array_size) {
|
|
fprintf(stderr, Name ": %s not large enough to join array\n",
|
|
dv->devname);
|
|
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.
|
|
*/
|
|
tst->ss->uuid_from_super(tst, duuid);
|
|
|
|
/* re-add doesn't work for version-1 superblocks
|
|
* before 2.6.18 :-(
|
|
*/
|
|
if (array.major_version == 1 &&
|
|
get_linux_version() <= 2006018)
|
|
;
|
|
else if (st->sb) {
|
|
st->ss->uuid_from_super(st, ouuid);
|
|
if (memcmp(duuid, ouuid, sizeof(ouuid))==0) {
|
|
/* looks close enough for now. Kernel
|
|
* will worry about whether a bitmap
|
|
* based reconstruction is possible.
|
|
*/
|
|
struct mdinfo mdi;
|
|
st->ss->getinfo_super(st, &mdi);
|
|
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 (dv->writemostly == 1)
|
|
disc.state |= 1 << MD_DISK_WRITEMOSTLY;
|
|
if (dv->writemostly == 2)
|
|
disc.state &= ~(1 << MD_DISK_WRITEMOSTLY);
|
|
if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
|
|
if (verbose >= 0)
|
|
fprintf(stderr, Name ": re-added %s\n", dv->devname);
|
|
continue;
|
|
}
|
|
if (errno == ENOMEM || errno == EROFS) {
|
|
fprintf(stderr, Name ": add new device failed for %s: %s\n",
|
|
dv->devname, strerror(errno));
|
|
return 1;
|
|
}
|
|
/* fall back on normal-add */
|
|
}
|
|
}
|
|
} else {
|
|
/* non-persistent. Must ensure that new drive
|
|
* is at least array.size big.
|
|
*/
|
|
if (ldsize/512 < array_size) {
|
|
fprintf(stderr, Name ": %s not large enough to join array\n",
|
|
dv->devname);
|
|
return 1;
|
|
}
|
|
}
|
|
/* in 2.6.17 and earlier, version-1 superblocks won't
|
|
* use the number we write, but will choose a free number.
|
|
* we must choose the same free number, which requires
|
|
* starting at 'raid_disks' and counting up
|
|
*/
|
|
for (j = array.raid_disks; j< tst->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 == 1)
|
|
disc.state |= 1 << MD_DISK_WRITEMOSTLY;
|
|
tst->ss->add_to_super(tst, &disc);
|
|
if (tst->ss->write_init_super(tst, &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< tst->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 == 1)
|
|
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", dnprintable,
|
|
strerror(errno));
|
|
return 1;
|
|
}
|
|
if (verbose >= 0)
|
|
fprintf(stderr, Name ": hot removed %s\n",
|
|
dnprintable);
|
|
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",
|
|
dnprintable, strerror(errno));
|
|
return 1;
|
|
}
|
|
if (verbose >= 0)
|
|
fprintf(stderr, Name ": set %s faulty in %s\n",
|
|
dnprintable, devname);
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
|
|
}
|
|
|
|
int autodetect(void)
|
|
{
|
|
/* Open any md device, and issue the RAID_AUTORUN ioctl */
|
|
int rv = 1;
|
|
int fd = dev_open("9:0", O_RDONLY);
|
|
if (fd >= 0) {
|
|
if (ioctl(fd, RAID_AUTORUN, 0) == 0)
|
|
rv = 0;
|
|
close(fd);
|
|
}
|
|
return rv;
|
|
}
|
|
#endif
|