1/* $OpenBSD: i386_softraid.c,v 1.21 2022/11/07 15:56:09 kn Exp $ */ 2/* 3 * Copyright (c) 2012 Joel Sing <jsing@openbsd.org> 4 * Copyright (c) 2010 Otto Moerbeek <otto@drijf.net> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19#include <sys/param.h> /* DEV_BSIZE */ 20#include <sys/disklabel.h> 21#include <sys/dkio.h> 22#include <sys/ioctl.h> 23#include <sys/stat.h> 24 25#include <dev/biovar.h> 26#include <dev/softraidvar.h> 27#include <ufs/ufs/dinode.h> 28 29#include <err.h> 30#include <fcntl.h> 31#include <stdio.h> 32#include <stdlib.h> 33#include <string.h> 34#include <unistd.h> 35 36#include "installboot.h" 37#include "i386_installboot.h" 38 39void sr_install_bootblk(int, int, int); 40void sr_install_bootldr(int, char *); 41 42void 43sr_install_bootblk(int devfd, int vol, int disk) 44{ 45 struct bioc_disk bd; 46 struct disklabel dl; 47 struct partition *pp; 48 uint32_t poffset; 49 char *dev; 50 char part, efipart; 51 int diskfd; 52 53 diskfd = sr_open_chunk(devfd, vol, disk, &bd, &dev, &part); 54 if (diskfd == -1) 55 return; 56 57 /* Get and check disklabel. */ 58 if (ioctl(diskfd, DIOCGDINFO, &dl) == -1) 59 err(1, "disklabel: %s", dev); 60 if (dl.d_magic != DISKMAGIC) 61 err(1, "bad disklabel magic=0x%08x", dl.d_magic); 62 63 /* Warn on unknown disklabel types. */ 64 if (dl.d_type == 0) 65 warnx("disklabel type unknown"); 66 67 efipart = findgptefisys(diskfd, &dl); 68 if (efipart != -1) { 69 write_filesystem(&dl, (char)efipart); 70 return; 71 } 72 73 /* Determine poffset and set symbol value. */ 74 pp = &dl.d_partitions[part - 'a']; 75 if (pp->p_offseth != 0) 76 errx(1, "partition offset too high"); 77 poffset = pp->p_offset; /* Offset of RAID partition. */ 78 poffset += SR_BOOT_LOADER_OFFSET; /* SR boot loader area. */ 79 sym_set_value(pbr_symbols, "_p_offset", poffset); 80 81 if (verbose) 82 fprintf(stderr, "%s%c: %s boot blocks on %s, part offset %u\n", 83 bd.bd_vendor, part, 84 (nowrite ? "would install" : "installing"), dev, poffset); 85 86 /* Write boot blocks to device. */ 87 write_bootblocks(diskfd, dev, &dl); 88 89 close(diskfd); 90} 91 92void 93sr_install_bootldr(int devfd, char *dev) 94{ 95 struct bioc_installboot bb; 96 struct stat sb; 97 struct ufs1_dinode *ino_p; 98 uint32_t bootsize, inodeblk, inodedbl; 99 uint16_t bsize = SR_FS_BLOCKSIZE; 100 uint16_t nblocks; 101 uint8_t bshift = 5; /* fragsize == blocksize */ 102 int fd, i; 103 u_char *p; 104 105 /* 106 * Install boot loader into softraid boot loader storage area. 107 * 108 * In order to allow us to reuse the existing biosboot we construct 109 * a fake FFS filesystem with a single inode, which points to the 110 * boot loader. 111 */ 112 113 nblocks = howmany(SR_BOOT_LOADER_SIZE, SR_FS_BLOCKSIZE / DEV_BSIZE); 114 inodeblk = nblocks - 1; 115 bootsize = nblocks * SR_FS_BLOCKSIZE; 116 117 p = calloc(1, bootsize); 118 if (p == NULL) 119 err(1, NULL); 120 121 fd = open(stage2, O_RDONLY); 122 if (fd == -1) 123 err(1, NULL); 124 125 if (fstat(fd, &sb) == -1) 126 err(1, NULL); 127 128 nblocks = howmany(sb.st_blocks, SR_FS_BLOCKSIZE / DEV_BSIZE); 129 if (sb.st_blocks * S_BLKSIZE > bootsize - 130 (int)(sizeof(struct ufs1_dinode))) 131 errx(1, "boot code will not fit"); 132 133 /* We only need to fill the direct block array. */ 134 ino_p = (struct ufs1_dinode *)&p[bootsize - sizeof(struct ufs1_dinode)]; 135 136 ino_p->di_mode = sb.st_mode; 137 ino_p->di_nlink = 1; 138 ino_p->di_inumber = 0xfeebfaab; 139 ino_p->di_size = read(fd, p, sb.st_blocks * S_BLKSIZE); 140 ino_p->di_blocks = nblocks; 141 for (i = 0; i < nblocks; i++) 142 ino_p->di_db[i] = i; 143 144 inodedbl = ((u_char*)&ino_p->di_db[0] - 145 &p[bootsize - SR_FS_BLOCKSIZE]) + INODEOFF; 146 147 memset(&bb, 0, sizeof(bb)); 148 bb.bb_bootldr = p; 149 bb.bb_bootldr_size = bootsize; 150 bb.bb_bootblk = "XXX"; 151 bb.bb_bootblk_size = sizeof("XXX"); 152 strncpy(bb.bb_dev, dev, sizeof(bb.bb_dev)); 153 if (verbose) 154 fprintf(stderr, "%s: %s boot loader on softraid volume\n", dev, 155 (nowrite ? "would install" : "installing")); 156 if (!nowrite) { 157 if (ioctl(devfd, BIOCINSTALLBOOT, &bb) == -1) 158 errx(1, "softraid installboot failed"); 159 sr_status(&bb.bb_bio.bio_status); 160 } 161 162 /* 163 * Set the values that will need to go into biosboot 164 * (the partition boot record, a.k.a. the PBR). 165 */ 166 sym_set_value(pbr_symbols, "_fs_bsize_p", (bsize / 16)); 167 sym_set_value(pbr_symbols, "_fs_bsize_s", (bsize / 512)); 168 sym_set_value(pbr_symbols, "_fsbtodb", bshift); 169 sym_set_value(pbr_symbols, "_inodeblk", inodeblk); 170 sym_set_value(pbr_symbols, "_inodedbl", inodedbl); 171 sym_set_value(pbr_symbols, "_nblocks", nblocks); 172 sym_set_value(pbr_symbols, "_blkincr", 0); 173 174 if (verbose) 175 fprintf(stderr, "%s is %d blocks x %d bytes\n", 176 stage2, nblocks, bsize); 177 178 free(p); 179 close(fd); 180} 181