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/* $OpenBSD: i386_softraid.c,v 1.2 2014/06/09 13:13:48 jsing Exp $ */
/*
* Copyright (c) 2012 Joel Sing <jsing@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/disklabel.h>
#include <sys/dkio.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <dev/biovar.h>
#include <dev/softraidvar.h>
#include <ufs/ufs/dinode.h>
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
#include "installboot.h"
#include "i386_installboot.h"
void sr_install_bootblk(int, int, int);
void sr_install_bootldr(int, char *);
void
sr_install_bootblk(int devfd, int vol, int disk)
{
struct bioc_disk bd;
struct disklabel dl;
struct partition *pp;
uint32_t poffset;
char *dev;
char part;
int diskfd;
/* Get device name for this disk/chunk. */
memset(&bd, 0, sizeof(bd));
bd.bd_volid = vol;
bd.bd_diskid = disk;
if (ioctl(devfd, BIOCDISK, &bd) == -1)
err(1, "BIOCDISK");
/* Check disk status. */
if (bd.bd_status != BIOC_SDONLINE && bd.bd_status != BIOC_SDREBUILD) {
fprintf(stderr, "softraid chunk %u not online - skipping...\n",
disk);
return;
}
if (strlen(bd.bd_vendor) < 1)
errx(1, "invalid disk name");
part = bd.bd_vendor[strlen(bd.bd_vendor) - 1];
if (part < 'a' || part >= 'a' + MAXPARTITIONS)
errx(1, "invalid partition %c\n", part);
bd.bd_vendor[strlen(bd.bd_vendor) - 1] = '\0';
/* Open this device and check its disklabel. */
if ((diskfd = opendev(bd.bd_vendor, (nowrite? O_RDONLY:O_RDWR),
OPENDEV_PART, &dev)) < 0)
err(1, "open: %s", dev);
/* Get and check disklabel. */
if (ioctl(diskfd, DIOCGDINFO, &dl) != 0)
err(1, "disklabel: %s", dev);
if (dl.d_magic != DISKMAGIC)
err(1, "bad disklabel magic=0x%08x", dl.d_magic);
/* Warn on unknown disklabel types. */
if (dl.d_type == 0)
warnx("disklabel type unknown");
/* Determine poffset and set symbol value. */
pp = &dl.d_partitions[part - 'a'];
if (pp->p_offseth != 0)
errx(1, "partition offset too high");
poffset = pp->p_offset; /* Offset of RAID partition. */
poffset += SR_BOOT_LOADER_OFFSET; /* SR boot loader area. */
sym_set_value(pbr_symbols, "_p_offset", poffset);
if (verbose)
fprintf(stderr, "%s%c: installing boot blocks on %s, "
"part offset %u\n", bd.bd_vendor, part, dev, poffset);
/* Write boot blocks to device. */
write_bootblocks(diskfd, dev, &dl);
close(diskfd);
}
void
sr_install_bootldr(int devfd, char *dev)
{
struct bioc_installboot bb;
struct stat sb;
struct ufs1_dinode *ino_p;
uint32_t bootsize, inodeblk, inodedbl;
uint16_t bsize = SR_FS_BLOCKSIZE;
uint16_t nblocks;
uint8_t bshift = 5; /* fragsize == blocksize */
int fd, i;
u_char *p;
/*
* Install boot loader into softraid boot loader storage area.
*
* In order to allow us to reuse the existing biosboot we construct
* a fake FFS filesystem with a single inode, which points to the
* boot loader.
*/
nblocks = howmany(SR_BOOT_LOADER_SIZE, SR_FS_BLOCKSIZE / DEV_BSIZE);
inodeblk = nblocks - 1;
bootsize = nblocks * SR_FS_BLOCKSIZE;
p = calloc(1, bootsize);
if (p == NULL)
err(1, NULL);
fd = open(stage2, O_RDONLY, 0);
if (fd == -1)
err(1, NULL);
if (fstat(fd, &sb) == -1)
err(1, NULL);
nblocks = howmany(sb.st_blocks, SR_FS_BLOCKSIZE / DEV_BSIZE);
if (sb.st_blocks * S_BLKSIZE > bootsize -
(int)(sizeof(struct ufs1_dinode)))
errx(1, "boot code will not fit");
/* We only need to fill the direct block array. */
ino_p = (struct ufs1_dinode *)&p[bootsize - sizeof(struct ufs1_dinode)];
ino_p->di_mode = sb.st_mode;
ino_p->di_nlink = 1;
ino_p->di_inumber = 0xfeebfaab;
ino_p->di_size = read(fd, p, sb.st_blocks * S_BLKSIZE);
ino_p->di_blocks = nblocks;
for (i = 0; i < nblocks; i++)
ino_p->di_db[i] = i;
inodedbl = ((u_char*)&ino_p->di_db[0] -
&p[bootsize - SR_FS_BLOCKSIZE]) + INODEOFF;
memset(&bb, 0, sizeof(bb));
bb.bb_bootldr = p;
bb.bb_bootldr_size = bootsize;
bb.bb_bootblk = "XXX";
bb.bb_bootblk_size = sizeof("XXX");
strncpy(bb.bb_dev, dev, sizeof(bb.bb_dev));
if (!nowrite) {
if (verbose)
fprintf(stderr, "%s: installing boot loader on "
"softraid volume\n", dev);
if (ioctl(devfd, BIOCINSTALLBOOT, &bb) == -1)
errx(1, "softraid installboot failed");
}
/*
* Set the values that will need to go into biosboot
* (the partition boot record, a.k.a. the PBR).
*/
sym_set_value(pbr_symbols, "_fs_bsize_p", (bsize / 16));
sym_set_value(pbr_symbols, "_fs_bsize_s", (bsize / 512));
sym_set_value(pbr_symbols, "_fsbtodb", bshift);
sym_set_value(pbr_symbols, "_inodeblk", inodeblk);
sym_set_value(pbr_symbols, "_inodedbl", inodedbl);
sym_set_value(pbr_symbols, "_nblocks", nblocks);
if (verbose)
fprintf(stderr, "%s is %d blocks x %d bytes\n",
stage2, nblocks, bsize);
close(fd);
}
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