208 lines
5.3 KiB
C
208 lines
5.3 KiB
C
/*
|
|
* 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 layout,
|
|
int raiddisks,
|
|
mddev_dev_t devlist, int assume_clean)
|
|
{
|
|
/* 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 verbose = 0;
|
|
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;
|
|
}
|
|
|
|
if (layout == UnSet)
|
|
switch(level) {
|
|
default: /* no layout */
|
|
layout = 0;
|
|
break;
|
|
case 10:
|
|
layout = 0x102; /* near=2, far=1 */
|
|
if (verbose)
|
|
fprintf(stderr,
|
|
Name ": layout defaults to n1\n");
|
|
break;
|
|
case 5:
|
|
case 6:
|
|
layout = map_name(r5layout, "default");
|
|
if (verbose)
|
|
fprintf(stderr,
|
|
Name ": layout defaults to %s\n", map_num(r5layout, layout));
|
|
break;
|
|
case LEVEL_FAULTY:
|
|
layout = map_name(faultylayout, "default");
|
|
|
|
if (verbose)
|
|
fprintf(stderr,
|
|
Name ": layout defaults to %s\n", map_num(faultylayout, layout));
|
|
break;
|
|
}
|
|
|
|
|
|
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 */
|
|
if (assume_clean)
|
|
array.state |= 1;
|
|
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;
|
|
array.layout = layout;
|
|
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: %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;
|
|
|
|
}
|
|
|