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/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
* Copyright (C) 2001-2002 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 "mdadm.h"
#define REGISTER_DEV _IO (MD_MAJOR, 1)
#define START_MD _IO (MD_MAJOR, 2)
#define STOP_MD _IO (MD_MAJOR, 3)
int Build(char *mddev, int mdfd, int chunk, int level,
int raiddisks,
mddev_dev_t devlist)
{
/* Build a linear or raid0 arrays without superblocks
* We cannot really do any checks, we just do it.
* For md_version < 0.90.0, we call REGISTER_DEV
* with the device numbers, and then
* START_MD giving the "geometry"
* geometry is 0xpp00cc
* where pp is personality: 1==linear, 2=raid0
* cc = chunk size factor: 0==4k, 1==8k etc.
*
* For md_version >= 0.90.0 we call
* SET_ARRAY_INFO, ADD_NEW_DISK, RUN_ARRAY
*
*/
int i;
int vers;
struct stat stb;
int subdevs = 0;
mddev_dev_t dv;
/* scan all devices, make sure they really are block devices */
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;
}
subdevs++;
}
if (raiddisks != subdevs) {
fprintf(stderr, Name ": requested %d devices in array but listed %d\n",
raiddisks, subdevs);
return 1;
}
vers = md_get_version(mdfd);
/* looks Ok, go for it */
if (vers >= 9000) {
mdu_array_info_t array;
array.level = level;
array.size = 0;
array.nr_disks = raiddisks;
array.raid_disks = raiddisks;
array.md_minor = 0;
if (fstat(mdfd, &stb)==0)
array.md_minor = MINOR(stb.st_rdev);
array.not_persistent = 1;
array.state = 0; /* not clean, but no errors */
array.active_disks = raiddisks;
array.working_disks = raiddisks;
array.spare_disks = 0;
array.failed_disks = 0;
if (chunk == 0)
chunk = 64;
array.chunk_size = chunk*1024;
if (ioctl(mdfd, SET_ARRAY_INFO, &array)) {
fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n",
mddev, strerror(errno));
return 1;
}
}
/* now add the devices */
for ((i=0), (dv = devlist) ; dv ; i++, dv=dv->next) {
if (stat(dv->devname, &stb)) {
fprintf(stderr, Name ": Wierd: %s has disappeared.\n",
dv->devname);
goto abort;
}
if ((stb.st_mode & S_IFMT)!= S_IFBLK) {
fprintf(stderr, Name ": Wierd: %s is no longer a block device.\n",
dv->devname);
goto abort;
}
if (vers>= 9000) {
mdu_disk_info_t disk;
disk.number = i;
disk.raid_disk = i;
disk.state = 6;
disk.major = MAJOR(stb.st_rdev);
disk.minor = MINOR(stb.st_rdev);
if (ioctl(mdfd, ADD_NEW_DISK, &disk)) {
fprintf(stderr, Name ": ADD_NEW_DISK failed for %s: %s\n",
dv->devname, strerror(errno));
goto abort;
}
} else {
if (ioctl(mdfd, REGISTER_DEV, &stb.st_rdev)) {
fprintf(stderr, Name ": REGISTER_DEV failed for %s.\n",
dv->devname, strerror(errno));
goto abort;
}
}
}
/* now to start it */
if (vers >= 9000) {
mdu_param_t param; /* not used by syscall */
if (ioctl(mdfd, RUN_ARRAY, ¶m)) {
fprintf(stderr, Name ": RUN_ARRAY failed: %s\n",
strerror(errno));
goto abort;
}
} else {
unsigned long arg;
arg=0;
while (chunk > 4096) {
arg++;
chunk >>= 1;
}
if (level == 0)
chunk |= 0x20000;
else chunk |= 0x10000;
if (ioctl(mdfd, START_MD, arg)) {
fprintf(stderr, Name ": START_MD failed: %s\n",
strerror(errno));
goto abort;
}
}
fprintf(stderr, Name ": array %s built and started.\n",
mddev);
return 0;
abort:
if (vers >= 9000)
ioctl(mdfd, STOP_ARRAY, 0);
else
ioctl(mdfd, STOP_MD, 0);
return 1;
}
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