/*
- * mdctl - manage Linux "md" devices aka RAID arrays.
+ * mdadm - manage Linux "md" devices aka RAID arrays.
*
- * Copyright (C) 2001 Neil Brown <neilb@cse.unsw.edu.au>
+ * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
*
*
* This program is free software; you can redistribute it and/or modify
* Australia
*/
-#include "mdctl.h"
+#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)
+#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));
+ 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,
- int devcnt, char *devnames[], int devmodes[])
+ 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;
+ mddev_dev_t dv, next = NULL;
+ struct stat stb;
+ int j, jnext = 0;
+ 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, 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;
+
+ 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 */
+ 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;
+ }
+ remove_partitions(tfd);
+ if (array.not_persistent==0)
+ st->ss->load_super(st, tfd, &osuper, NULL);
+ /* will use osuper later */
+ 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) {
+
+ /* Make sure device is large enough */
+ if (st->ss->avail_size(st, ldsize/512) <
+ array.size) {
+ fprintf(stderr, Name ": %s not large enough to join array\n",
+ dv->devname);
+ return 1;
+ }
+
+ /* 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(st, duuid, dsuper);
+
+ /* re-add doesn't work for version-1 superblocks
+ * before 2.6.18 :-(
+ */
+ if (array.major_version == 1 &&
+ get_linux_version() <= 2006018)
+ ;
+ else if (osuper) {
+ st->ss->uuid_from_super(st, ouuid, osuper);
+ 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, 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 (dv->writemostly)
+ 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;
+ }
+ /* 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< 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(st, 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", 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
projects / thirdparty / mdadm.git / blobdiff