1/*- 2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 3 * Copyright (c) 1998,2000 Doug Rabson <dfr@freebsd.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD$"); 30 31#include <stand.h> 32#include <string.h> 33#include <setjmp.h> 34 35#include "bootstrap.h" 36#include "disk.h" 37#include "libuserboot.h" 38 39#if defined(USERBOOT_ZFS_SUPPORT) 40#include "../zfs/libzfs.h" 41 42static void userboot_zfs_probe(void); 43static int userboot_zfs_found; 44#endif 45 46#define USERBOOT_VERSION USERBOOT_VERSION_3 47 48#define MALLOCSZ (10*1024*1024) 49 50struct loader_callbacks *callbacks; 51void *callbacks_arg; 52 53extern char bootprog_name[]; 54extern char bootprog_rev[]; 55extern char bootprog_date[]; 56extern char bootprog_maker[]; 57static jmp_buf jb; 58 59struct arch_switch archsw; /* MI/MD interface boundary */ 60 61static void extract_currdev(void); 62 63void 64delay(int usec) 65{ 66 67 CALLBACK(delay, usec); 68} 69 70void 71exit(int v) 72{ 73 74 CALLBACK(exit, v); 75 longjmp(jb, 1); 76} 77 78void 79loader_main(struct loader_callbacks *cb, void *arg, int version, int ndisks) 80{ 81 static char mallocbuf[MALLOCSZ]; 82 const char *var; 83 int i; 84 85 if (version != USERBOOT_VERSION) 86 abort(); 87 88 callbacks = cb; 89 callbacks_arg = arg; 90 userboot_disk_maxunit = ndisks; 91 92 /* 93 * initialise the heap as early as possible. Once this is done, 94 * alloc() is usable. 95 */ 96 setheap((void *)mallocbuf, (void *)(mallocbuf + sizeof(mallocbuf))); 97 98 /* 99 * Hook up the console 100 */ 101 cons_probe(); 102 103 printf("\n"); 104 printf("%s, Revision %s\n", bootprog_name, bootprog_rev); 105 printf("(%s, %s)\n", bootprog_maker, bootprog_date); 106#if 0 107 printf("Memory: %ld k\n", memsize() / 1024); 108#endif 109 110 setenv("LINES", "24", 1); /* optional */ 111 112 /* 113 * Set custom environment variables 114 */ 115 i = 0; 116 while (1) { 117 var = CALLBACK(getenv, i++); 118 if (var == NULL) 119 break; 120 putenv(var); 121 } 122 123 archsw.arch_autoload = userboot_autoload; 124 archsw.arch_getdev = userboot_getdev; 125 archsw.arch_copyin = userboot_copyin; 126 archsw.arch_copyout = userboot_copyout; 127 archsw.arch_readin = userboot_readin; 128#if defined(USERBOOT_ZFS_SUPPORT) 129 archsw.arch_zfs_probe = userboot_zfs_probe; 130#endif 131 132 /* 133 * March through the device switch probing for things. 134 */ 135 for (i = 0; devsw[i] != NULL; i++) 136 if (devsw[i]->dv_init != NULL) 137 (devsw[i]->dv_init)(); 138 139 extract_currdev(); 140 141 if (setjmp(jb)) 142 return; 143 144 interact(); /* doesn't return */ 145 146 exit(0); 147} 148 149/* 150 * Set the 'current device' by (if possible) recovering the boot device as 151 * supplied by the initial bootstrap. 152 */ 153static void 154extract_currdev(void) 155{ 156 struct disk_devdesc dev; 157 158 //bzero(&dev, sizeof(dev)); 159 160#if defined(USERBOOT_ZFS_SUPPORT) 161 if (userboot_zfs_found) { 162 struct zfs_devdesc zdev; 163 164 /* Leave the pool/root guid's unassigned */ 165 bzero(&zdev, sizeof(zdev)); 166 zdev.d_dev = &zfs_dev; 167 zdev.d_type = zdev.d_dev->dv_type; 168 169 dev = *(struct disk_devdesc *)&zdev; 170 } else 171#endif 172 173 if (userboot_disk_maxunit > 0) { 174 dev.d_dev = &userboot_disk; 175 dev.d_type = dev.d_dev->dv_type; 176 dev.d_unit = 0; 177 dev.d_slice = 0; 178 dev.d_partition = 0; 179 /* 180 * If we cannot auto-detect the partition type then 181 * access the disk as a raw device. 182 */ 183 if (dev.d_dev->dv_open(NULL, &dev)) { 184 dev.d_slice = -1; 185 dev.d_partition = -1; 186 } 187 } else { 188 dev.d_dev = &host_dev; 189 dev.d_type = dev.d_dev->dv_type; 190 dev.d_unit = 0; 191 } 192 193 env_setenv("currdev", EV_VOLATILE, userboot_fmtdev(&dev), 194 userboot_setcurrdev, env_nounset); 195 env_setenv("loaddev", EV_VOLATILE, userboot_fmtdev(&dev), 196 env_noset, env_nounset); 197} 198 199#if defined(USERBOOT_ZFS_SUPPORT) 200static void 201userboot_zfs_probe(void) 202{ 203 char devname[32]; 204 uint64_t pool_guid; 205 int unit; 206 207 /* 208 * Open all the disks we can find and see if we can reconstruct 209 * ZFS pools from them. Record if any were found. 210 */ 211 for (unit = 0; unit < userboot_disk_maxunit; unit++) { 212 sprintf(devname, "disk%d:", unit); 213 pool_guid = 0; 214 zfs_probe_dev(devname, &pool_guid); 215 if (pool_guid != 0) 216 userboot_zfs_found = 1; 217 } 218} 219 220COMMAND_SET(lszfs, "lszfs", "list child datasets of a zfs dataset", 221 command_lszfs); 222 223static int 224command_lszfs(int argc, char *argv[]) 225{ 226 int err; 227 228 if (argc != 2) { 229 command_errmsg = "a single dataset must be supplied"; 230 return (CMD_ERROR); 231 } 232 233 err = zfs_list(argv[1]); 234 if (err != 0) { 235 command_errmsg = strerror(err); 236 return (CMD_ERROR); 237 } 238 return (CMD_OK); 239} 240#endif /* USERBOOT_ZFS_SUPPORT */ 241 242COMMAND_SET(quit, "quit", "exit the loader", command_quit); 243 244static int 245command_quit(int argc, char *argv[]) 246{ 247 248 exit(USERBOOT_EXIT_QUIT); 249 return (CMD_OK); 250} 251 252COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 253 254static int 255command_reboot(int argc, char *argv[]) 256{ 257 258 exit(USERBOOT_EXIT_REBOOT); 259 return (CMD_OK); 260} 261