/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
* Copyright (C) 2001-2009 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@suse.de>
*/
#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, struct mddev_dev *devlist,
struct shape *s, struct context *c)
{
/* 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, missing_disks = 0;
struct mddev_dev *dv;
int bitmap_fd;
unsigned long long bitmapsize;
int mdfd;
char chosen_name[1024];
int uuid[4] = {0,0,0,0};
struct map_ent *map = NULL;
/* scan all devices, make sure they really are block devices */
for (dv = devlist; dv; dv=dv->next) {
subdevs++;
if (strcmp("missing", dv->devname) == 0) {
missing_disks++;
continue;
}
if (stat(dv->devname, &stb)) {
pr_err("Cannot find %s: %s\n",
dv->devname, strerror(errno));
return 1;
}
if ((stb.st_mode & S_IFMT) != S_IFBLK) {
pr_err("%s is not a block device.\n",
dv->devname);
return 1;
}
}
if (s->raiddisks != subdevs) {
pr_err("requested %d devices in array but listed %d\n",
s->raiddisks, subdevs);
return 1;
}
if (s->layout == UnSet)
switch(s->level) {
default: /* no layout */
s->layout = 0;
break;
case 10:
s->layout = 0x102; /* near=2, far=1 */
if (c->verbose > 0)
pr_err("layout defaults to n1\n");
break;
case 5:
case 6:
s->layout = map_name(r5layout, "default");
if (c->verbose > 0)
pr_err("layout defaults to %s\n", map_num(r5layout, s->layout));
break;
case LEVEL_FAULTY:
s->layout = map_name(faultylayout, "default");
if (c->verbose > 0)
pr_err("layout defaults to %s\n", map_num(faultylayout, s->layout));
break;
}
/* We need to create the device. It can have no name. */
map_lock(&map);
mdfd = create_mddev(mddev, NULL, c->autof, LOCAL,
chosen_name);
if (mdfd < 0) {
map_unlock(&map);
return 1;
}
mddev = chosen_name;
map_update(&map, fd2devnm(mdfd), "none", uuid, chosen_name);
map_unlock(&map);
vers = md_get_version(mdfd);
/* looks Ok, go for it */
if (vers >= 9000) {
mdu_array_info_t array;
array.level = s->level;
if (s->size == MAX_SIZE)
s->size = 0;
array.size = s->size;
array.nr_disks = s->raiddisks;
array.raid_disks = s->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 (s->assume_clean)
array.state |= 1;
array.active_disks = s->raiddisks - missing_disks;
array.working_disks = s->raiddisks - missing_disks;
array.spare_disks = 0;
array.failed_disks = missing_disks;
if (s->chunk == 0 && (s->level==0 || s->level==LEVEL_LINEAR))
s->chunk = 64;
array.chunk_size = s->chunk*1024;
array.layout = s->layout;
if (ioctl(mdfd, SET_ARRAY_INFO, &array)) {
pr_err("SET_ARRAY_INFO failed for %s: %s\n",
mddev, strerror(errno));
goto abort;
}
} else if (s->bitmap_file) {
pr_err("bitmaps not supported with this kernel\n");
goto abort;
}
if (s->bitmap_file && strcmp(s->bitmap_file, "none") == 0)
s->bitmap_file = NULL;
if (s->bitmap_file && s->level <= 0) {
pr_err("bitmaps not meaningful with level %s\n",
map_num(pers, s->level)?:"given");
goto abort;
}
/* now add the devices */
for ((i=0), (dv = devlist) ; dv ; i++, dv=dv->next) {
unsigned long long dsize;
int fd;
if (strcmp("missing", dv->devname) == 0)
continue;
if (stat(dv->devname, &stb)) {
pr_err("Weird: %s has disappeared.\n",
dv->devname);
goto abort;
}
if ((stb.st_mode & S_IFMT)!= S_IFBLK) {
pr_err("Weird: %s is no longer a block device.\n",
dv->devname);
goto abort;
}
fd = open(dv->devname, O_RDONLY|O_EXCL);
if (fd < 0) {
pr_err("Cannot open %s: %s\n",
dv->devname, strerror(errno));
goto abort;
}
if (get_dev_size(fd, NULL, &dsize) &&
(s->size == 0 || s->size == MAX_SIZE || dsize < s->size))
s->size = dsize;
close(fd);
if (vers >= 9000) {
mdu_disk_info_t disk;
disk.number = i;
disk.raid_disk = i;
disk.state = (1<<MD_DISK_SYNC) | (1<<MD_DISK_ACTIVE);
if (dv->writemostly == FlagSet)
disk.state |= 1<<MD_DISK_WRITEMOSTLY;
disk.major = major(stb.st_rdev);
disk.minor = minor(stb.st_rdev);
if (ioctl(mdfd, ADD_NEW_DISK, &disk)) {
pr_err("ADD_NEW_DISK failed for %s: %s\n",
dv->devname, strerror(errno));
goto abort;
}
} else {
if (ioctl(mdfd, REGISTER_DEV, &stb.st_rdev)) {
pr_err("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 (s->bitmap_file) {
bitmap_fd = open(s->bitmap_file, O_RDWR);
if (bitmap_fd < 0) {
int major = BITMAP_MAJOR_HI;
#if 0
if (s->bitmap_chunk == UnSet) {
pr_err("%s cannot be openned.",
s->bitmap_file);
goto abort;
}
#endif
if (vers < 9003) {
major = BITMAP_MAJOR_HOSTENDIAN;
#ifdef __BIG_ENDIAN
pr_err("Warning - bitmaps created on this kernel are not portable\n"
" between different architectures. Consider upgrading the Linux kernel.\n");
#endif
}
bitmapsize = s->size>>9; /* FIXME wrong for RAID10 */
if (CreateBitmap(s->bitmap_file, 1, NULL, s->bitmap_chunk,
c->delay, s->write_behind, bitmapsize, major)) {
goto abort;
}
bitmap_fd = open(s->bitmap_file, O_RDWR);
if (bitmap_fd < 0) {
pr_err("%s cannot be openned.",
s->bitmap_file);
goto abort;
}
}
if (bitmap_fd >= 0) {
if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) {
pr_err("Cannot set bitmap file for %s: %s\n",
mddev, strerror(errno));
goto abort;
}
}
}
if (ioctl(mdfd, RUN_ARRAY, ¶m)) {
pr_err("RUN_ARRAY failed: %s\n",
strerror(errno));
if (s->chunk & (s->chunk-1)) {
cont_err("Problem may be that chunk size is not a power of 2\n");
}
goto abort;
}
} else {
unsigned long arg;
arg=0;
while (s->chunk > 4096) {
arg++;
s->chunk >>= 1;
}
if (s->level == 0)
arg |= 0x20000;
else
arg |= 0x10000;
if (ioctl(mdfd, START_MD, arg)) {
pr_err("START_MD failed: %s\n",
strerror(errno));
goto abort;
}
}
if (c->verbose >= 0)
pr_err("array %s built and started.\n",
mddev);
wait_for(mddev, mdfd);
close(mdfd);
return 0;
abort:
if (vers >= 9000)
ioctl(mdfd, STOP_ARRAY, 0);
else
ioctl(mdfd, STOP_MD, 0);
close(mdfd);
return 1;
}