| 1 | /* |
| 2 | * S390 virtio-ccw network boot loading program |
| 3 | * |
| 4 | * Copyright 2017 Thomas Huth, Red Hat Inc. |
| 5 | * |
| 6 | * Based on the S390 virtio-ccw loading program (main.c) |
| 7 | * Copyright (c) 2013 Alexander Graf <agraf@suse.de> |
| 8 | * |
| 9 | * And based on the network loading code from SLOF (netload.c) |
| 10 | * Copyright (c) 2004, 2008 IBM Corporation |
| 11 | * |
| 12 | * This code is free software; you can redistribute it and/or modify it |
| 13 | * under the terms of the GNU General Public License as published by the |
| 14 | * Free Software Foundation; either version 2 of the License, or (at your |
| 15 | * option) any later version. |
| 16 | */ |
| 17 | |
| 18 | #include <stdint.h> |
| 19 | #include <stdbool.h> |
| 20 | #include <stdio.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <string.h> |
| 23 | #include <unistd.h> |
| 24 | |
| 25 | #include <tftp.h> |
| 26 | #include <ethernet.h> |
| 27 | #include <dhcp.h> |
| 28 | #include <dhcpv6.h> |
| 29 | #include <ipv4.h> |
| 30 | #include <ipv6.h> |
| 31 | #include <dns.h> |
| 32 | #include <time.h> |
| 33 | #include <pxelinux.h> |
| 34 | |
| 35 | #include "s390-ccw.h" |
| 36 | #include "cio.h" |
| 37 | #include "virtio.h" |
| 38 | #include "s390-time.h" |
| 39 | |
| 40 | #define DEFAULT_BOOT_RETRIES 10 |
| 41 | #define DEFAULT_TFTP_RETRIES 20 |
| 42 | |
| 43 | /* Index 0 is reserved for default alias, start PXE cfg indices at 1 */ |
| 44 | #define PXECFG_MAX (MAX_BOOT_ENTRIES - 1) |
| 45 | |
| 46 | extern char _start[]; |
| 47 | |
| 48 | #define KERNEL_ADDR ((void *)0L) |
| 49 | #define KERNEL_MAX_SIZE ((long)_start) |
| 50 | #define ARCH_COMMAND_LINE_SIZE 896 /* Taken from Linux kernel */ |
| 51 | |
| 52 | /* STSI 3.2.2 offset of first vmdb + offset of uuid inside vmdb */ |
| 53 | #define STSI322_VMDB_UUID_OFFSET ((8 + 12) * 4) |
| 54 | |
| 55 | static char cfgbuf[2048]; |
| 56 | |
| 57 | SubChannelId net_schid = { .one = 1 }; |
| 58 | static uint8_t mac[6]; |
| 59 | static uint64_t dest_timer; |
| 60 | |
| 61 | void set_timer(int val) |
| 62 | { |
| 63 | dest_timer = get_time_ms() + val; |
| 64 | } |
| 65 | |
| 66 | int get_timer(void) |
| 67 | { |
| 68 | return dest_timer - get_time_ms(); |
| 69 | } |
| 70 | |
| 71 | int get_sec_ticks(void) |
| 72 | { |
| 73 | return 1000; /* number of ticks in 1 second */ |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Obtain IP and configuration info from DHCP server (either IPv4 or IPv6). |
| 78 | * @param fn_ip contains the following configuration information: |
| 79 | * client MAC, client IP, TFTP-server MAC, TFTP-server IP, |
| 80 | * boot file name |
| 81 | * @param retries Number of DHCP attempts |
| 82 | * @return 0 : IP and configuration info obtained; |
| 83 | * non-0 : error condition occurred. |
| 84 | */ |
| 85 | static int dhcp(struct filename_ip *fn_ip, int retries) |
| 86 | { |
| 87 | int i = retries + 1; |
| 88 | int rc = -1; |
| 89 | |
| 90 | printf(" Requesting information via DHCP: "); |
| 91 | |
| 92 | dhcpv4_generate_transaction_id(); |
| 93 | dhcpv6_generate_transaction_id(); |
| 94 | |
| 95 | do { |
| 96 | printf("\b\b\b%03d", i - 1); |
| 97 | if (!--i) { |
| 98 | printf("\nGiving up after %d DHCP requests\n", retries); |
| 99 | return -1; |
| 100 | } |
| 101 | fn_ip->ip_version = 4; |
| 102 | rc = dhcpv4(NULL, fn_ip); |
| 103 | if (rc == -1) { |
| 104 | fn_ip->ip_version = 6; |
| 105 | set_ipv6_address(fn_ip->fd, 0); |
| 106 | rc = dhcpv6(NULL, fn_ip); |
| 107 | if (rc == 0) { |
| 108 | memcpy(&fn_ip->own_ip6, get_ipv6_address(), 16); |
| 109 | break; |
| 110 | } |
| 111 | } |
| 112 | if (rc != -1) { /* either success or non-dhcp failure */ |
| 113 | break; |
| 114 | } |
| 115 | } while (1); |
| 116 | printf("\b\b\b\bdone\n"); |
| 117 | |
| 118 | return rc; |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * Seed the random number generator with our mac and current timestamp |
| 123 | */ |
| 124 | static void seed_rng(uint8_t mac[]) |
| 125 | { |
| 126 | uint64_t seed; |
| 127 | |
| 128 | asm volatile(" stck %0 " : : "Q"(seed) : "memory"); |
| 129 | seed ^= (mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5]; |
| 130 | srand(seed); |
| 131 | } |
| 132 | |
| 133 | static int tftp_load(filename_ip_t *fnip, void *buffer, int len) |
| 134 | { |
| 135 | tftp_err_t tftp_err; |
| 136 | int rc; |
| 137 | |
| 138 | rc = tftp(fnip, buffer, len, DEFAULT_TFTP_RETRIES, &tftp_err); |
| 139 | |
| 140 | if (rc < 0) { |
| 141 | /* Make sure that error messages are put into a new line */ |
| 142 | printf("\n "); |
| 143 | } |
| 144 | |
| 145 | if (rc > 1024) { |
| 146 | printf(" TFTP: Received %s (%d KBytes)\n", fnip->filename, rc / 1024); |
| 147 | } else if (rc > 0) { |
| 148 | printf(" TFTP: Received %s (%d Bytes)\n", fnip->filename, rc); |
| 149 | } else { |
| 150 | const char *errstr = NULL; |
| 151 | int ecode; |
| 152 | tftp_get_error_info(fnip, &tftp_err, rc, &errstr, &ecode); |
| 153 | printf("TFTP error: %s\n", errstr ? errstr : "unknown error"); |
| 154 | } |
| 155 | |
| 156 | return rc; |
| 157 | } |
| 158 | |
| 159 | static int net_init_ip(filename_ip_t *fn_ip) |
| 160 | { |
| 161 | int rc; |
| 162 | |
| 163 | printf(" Using MAC address: %02x:%02x:%02x:%02x:%02x:%02x\n", |
| 164 | mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); |
| 165 | |
| 166 | set_mac_address(mac); /* init ethernet layer */ |
| 167 | seed_rng(mac); |
| 168 | |
| 169 | rc = dhcp(fn_ip, DEFAULT_BOOT_RETRIES); |
| 170 | if (rc >= 0) { |
| 171 | if (fn_ip->ip_version == 4) { |
| 172 | set_ipv4_address(fn_ip->own_ip); |
| 173 | } |
| 174 | } else if (rc == -2) { |
| 175 | printf("ARP request to TFTP server (%d.%d.%d.%d) failed\n", |
| 176 | (fn_ip->server_ip >> 24) & 0xFF, (fn_ip->server_ip >> 16) & 0xFF, |
| 177 | (fn_ip->server_ip >> 8) & 0xFF, fn_ip->server_ip & 0xFF); |
| 178 | return -102; |
| 179 | } else if (rc == -4 || rc == -3) { |
| 180 | puts("Can't obtain TFTP server IP address"); |
| 181 | return -107; |
| 182 | } else { |
| 183 | puts("Could not get IP address"); |
| 184 | return -101; |
| 185 | } |
| 186 | |
| 187 | if (fn_ip->ip_version == 4) { |
| 188 | printf(" Using IPv4 address: %d.%d.%d.%d\n", |
| 189 | (fn_ip->own_ip >> 24) & 0xFF, (fn_ip->own_ip >> 16) & 0xFF, |
| 190 | (fn_ip->own_ip >> 8) & 0xFF, fn_ip->own_ip & 0xFF); |
| 191 | } else if (fn_ip->ip_version == 6) { |
| 192 | char ip6_str[40]; |
| 193 | ipv6_to_str(fn_ip->own_ip6.addr, ip6_str); |
| 194 | printf(" Using IPv6 address: %s\n", ip6_str); |
| 195 | } |
| 196 | |
| 197 | printf(" Using TFTP server: "); |
| 198 | if (fn_ip->ip_version == 4) { |
| 199 | printf("%d.%d.%d.%d\n", |
| 200 | (fn_ip->server_ip >> 24) & 0xFF, (fn_ip->server_ip >> 16) & 0xFF, |
| 201 | (fn_ip->server_ip >> 8) & 0xFF, fn_ip->server_ip & 0xFF); |
| 202 | } else if (fn_ip->ip_version == 6) { |
| 203 | char ip6_str[40]; |
| 204 | ipv6_to_str(fn_ip->server_ip6.addr, ip6_str); |
| 205 | printf("%s\n", ip6_str); |
| 206 | } |
| 207 | |
| 208 | if (strlen(fn_ip->filename) > 0) { |
| 209 | printf(" Bootfile name: '%s'\n", fn_ip->filename); |
| 210 | } |
| 211 | |
| 212 | return rc; |
| 213 | } |
| 214 | |
| 215 | static int net_init(filename_ip_t *fn_ip) |
| 216 | { |
| 217 | int rc; |
| 218 | |
| 219 | memset(fn_ip, 0, sizeof(filename_ip_t)); |
| 220 | |
| 221 | rc = virtio_net_init(mac); |
| 222 | if (rc < 0) { |
| 223 | puts("Could not initialize network device"); |
| 224 | return -101; |
| 225 | } |
| 226 | fn_ip->fd = rc; |
| 227 | |
| 228 | rc = net_init_ip(fn_ip); |
| 229 | if (rc < 0) { |
| 230 | virtio_net_deinit(); |
| 231 | } |
| 232 | |
| 233 | return rc; |
| 234 | } |
| 235 | |
| 236 | static void net_release(filename_ip_t *fn_ip) |
| 237 | { |
| 238 | if (fn_ip->ip_version == 4) { |
| 239 | dhcp_send_release(fn_ip->fd); |
| 240 | } |
| 241 | virtio_net_deinit(); |
| 242 | } |
| 243 | |
| 244 | /** |
| 245 | * Retrieve the Universally Unique Identifier of the VM. |
| 246 | * @return UUID string, or NULL in case of errors |
| 247 | */ |
| 248 | static const char *get_uuid(void) |
| 249 | { |
| 250 | register int r0 asm("0"); |
| 251 | register int r1 asm("1"); |
| 252 | uint8_t *mem, *buf, uuid[16]; |
| 253 | int i, cc, chk = 0; |
| 254 | static char uuid_str[37]; |
| 255 | |
| 256 | mem = malloc(2 * PAGE_SIZE); |
| 257 | if (!mem) { |
| 258 | puts("Out of memory ... can not get UUID."); |
| 259 | return NULL; |
| 260 | } |
| 261 | buf = (uint8_t *)(((uint64_t)mem + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1)); |
| 262 | memset(buf, 0, PAGE_SIZE); |
| 263 | |
| 264 | /* Get SYSIB 3.2.2 */ |
| 265 | r0 = (3 << 28) | 2; |
| 266 | r1 = 2; |
| 267 | asm volatile(" stsi 0(%[addr])\n" |
| 268 | " ipm %[cc]\n" |
| 269 | " srl %[cc],28\n" |
| 270 | : [cc] "=d" (cc) |
| 271 | : "d" (r0), "d" (r1), [addr] "a" (buf) |
| 272 | : "cc", "memory"); |
| 273 | if (cc) { |
| 274 | free(mem); |
| 275 | return NULL; |
| 276 | } |
| 277 | |
| 278 | for (i = 0; i < 16; i++) { |
| 279 | uuid[i] = buf[STSI322_VMDB_UUID_OFFSET + i]; |
| 280 | chk |= uuid[i]; |
| 281 | } |
| 282 | free(mem); |
| 283 | if (!chk) { |
| 284 | return NULL; |
| 285 | } |
| 286 | |
| 287 | sprintf(uuid_str, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-" |
| 288 | "%02x%02x%02x%02x%02x%02x", uuid[0], uuid[1], uuid[2], uuid[3], |
| 289 | uuid[4], uuid[5], uuid[6], uuid[7], uuid[8], uuid[9], uuid[10], |
| 290 | uuid[11], uuid[12], uuid[13], uuid[14], uuid[15]); |
| 291 | |
| 292 | return uuid_str; |
| 293 | } |
| 294 | |
| 295 | /** |
| 296 | * Load a kernel with initrd (i.e. with the information that we've got from |
| 297 | * a pxelinux.cfg config file) |
| 298 | */ |
| 299 | static int load_kernel_with_initrd(filename_ip_t *fn_ip, |
| 300 | struct pl_cfg_entry *entry) |
| 301 | { |
| 302 | int rc; |
| 303 | |
| 304 | printf("Loading pxelinux.cfg entry '%s'\n", entry->label); |
| 305 | |
| 306 | if (!entry->kernel) { |
| 307 | puts("Kernel entry is missing!\n"); |
| 308 | return -1; |
| 309 | } |
| 310 | |
| 311 | strncpy(fn_ip->filename, entry->kernel, sizeof(fn_ip->filename)); |
| 312 | rc = tftp_load(fn_ip, KERNEL_ADDR, KERNEL_MAX_SIZE); |
| 313 | if (rc < 0) { |
| 314 | return rc; |
| 315 | } |
| 316 | |
| 317 | if (entry->initrd) { |
| 318 | uint64_t iaddr = (rc + 0xfff) & ~0xfffUL; |
| 319 | |
| 320 | strncpy(fn_ip->filename, entry->initrd, sizeof(fn_ip->filename)); |
| 321 | rc = tftp_load(fn_ip, (void *)iaddr, KERNEL_MAX_SIZE - iaddr); |
| 322 | if (rc < 0) { |
| 323 | return rc; |
| 324 | } |
| 325 | /* Patch location and size: */ |
| 326 | *(uint64_t *)0x10408 = iaddr; |
| 327 | *(uint64_t *)0x10410 = rc; |
| 328 | rc += iaddr; |
| 329 | } |
| 330 | |
| 331 | if (entry->append) { |
| 332 | strncpy((char *)0x10480, entry->append, ARCH_COMMAND_LINE_SIZE); |
| 333 | } |
| 334 | |
| 335 | return rc; |
| 336 | } |
| 337 | |
| 338 | static int net_boot_menu(int num_ent, int def_ent, |
| 339 | struct pl_cfg_entry *entries) |
| 340 | { |
| 341 | bool valid_entries[MAX_BOOT_ENTRIES] = { false }; |
| 342 | int idx; |
| 343 | |
| 344 | puts("\ns390-ccw pxelinux.cfg boot menu:\n"); |
| 345 | printf(" [0] default (%d)\n", def_ent + 1); |
| 346 | valid_entries[0] = true; |
| 347 | |
| 348 | for (idx = 1; idx <= num_ent; idx++) { |
| 349 | printf(" [%d] %s\n", idx, entries[idx - 1].label); |
| 350 | valid_entries[idx] = true; |
| 351 | } |
| 352 | putchar('\n'); |
| 353 | |
| 354 | idx = menu_get_boot_index(valid_entries); |
| 355 | putchar('\n'); |
| 356 | |
| 357 | return idx; |
| 358 | } |
| 359 | |
| 360 | static int net_select_and_load_kernel(filename_ip_t *fn_ip, |
| 361 | int num_ent, int selected, |
| 362 | struct pl_cfg_entry *entries) |
| 363 | { |
| 364 | unsigned int loadparm = get_loadparm_index(); |
| 365 | |
| 366 | if (num_ent <= 0) { |
| 367 | return -1; |
| 368 | } |
| 369 | |
| 370 | if (menu_is_enabled_enum() && num_ent > 1) { |
| 371 | loadparm = net_boot_menu(num_ent, selected, entries); |
| 372 | } |
| 373 | |
| 374 | IPL_assert(loadparm <= num_ent, |
| 375 | "loadparm is set to an entry that is not available in the " |
| 376 | "pxelinux.cfg file!"); |
| 377 | |
| 378 | if (loadparm > 0) { |
| 379 | selected = loadparm - 1; |
| 380 | } |
| 381 | |
| 382 | return load_kernel_with_initrd(fn_ip, &entries[selected]); |
| 383 | } |
| 384 | |
| 385 | static int net_try_pxelinux_cfg(filename_ip_t *fn_ip) |
| 386 | { |
| 387 | struct pl_cfg_entry entries[PXECFG_MAX]; |
| 388 | int num_ent, def_ent = 0; |
| 389 | |
| 390 | num_ent = pxelinux_load_parse_cfg(fn_ip, mac, get_uuid(), |
| 391 | DEFAULT_TFTP_RETRIES, |
| 392 | cfgbuf, sizeof(cfgbuf), |
| 393 | entries, PXECFG_MAX, &def_ent); |
| 394 | |
| 395 | return net_select_and_load_kernel(fn_ip, num_ent, def_ent, entries); |
| 396 | } |
| 397 | |
| 398 | /** |
| 399 | * Load via information from a .INS file (which can be found on CD-ROMs |
| 400 | * for example) |
| 401 | */ |
| 402 | static int handle_ins_cfg(filename_ip_t *fn_ip, char *cfg, int cfgsize) |
| 403 | { |
| 404 | char *ptr; |
| 405 | int rc = -1, llen; |
| 406 | void *destaddr; |
| 407 | char *insbuf = cfg; |
| 408 | |
| 409 | ptr = strchr(insbuf, '\n'); |
| 410 | if (!ptr) { |
| 411 | puts("Does not seem to be a valid .INS file"); |
| 412 | return -1; |
| 413 | } |
| 414 | |
| 415 | *ptr = 0; |
| 416 | printf("\nParsing .INS file:\n %s\n", &insbuf[2]); |
| 417 | |
| 418 | insbuf = ptr + 1; |
| 419 | while (*insbuf && insbuf < cfg + cfgsize) { |
| 420 | ptr = strchr(insbuf, '\n'); |
| 421 | if (ptr) { |
| 422 | *ptr = 0; |
| 423 | } |
| 424 | llen = strlen(insbuf); |
| 425 | if (!llen) { |
| 426 | insbuf = ptr + 1; |
| 427 | continue; |
| 428 | } |
| 429 | ptr = strchr(insbuf, ' '); |
| 430 | if (!ptr) { |
| 431 | puts("Missing space separator in .INS file"); |
| 432 | return -1; |
| 433 | } |
| 434 | *ptr = 0; |
| 435 | strncpy(fn_ip->filename, insbuf, sizeof(fn_ip->filename)); |
| 436 | destaddr = (char *)atol(ptr + 1); |
| 437 | rc = tftp_load(fn_ip, destaddr, (long)_start - (long)destaddr); |
| 438 | if (rc <= 0) { |
| 439 | break; |
| 440 | } |
| 441 | insbuf += llen + 1; |
| 442 | } |
| 443 | |
| 444 | return rc; |
| 445 | } |
| 446 | |
| 447 | static int net_try_direct_tftp_load(filename_ip_t *fn_ip) |
| 448 | { |
| 449 | int rc; |
| 450 | void *loadaddr = (void *)0x2000; /* Load right after the low-core */ |
| 451 | |
| 452 | rc = tftp_load(fn_ip, loadaddr, KERNEL_MAX_SIZE - (long)loadaddr); |
| 453 | if (rc < 0) { |
| 454 | return rc; |
| 455 | } else if (rc < 8) { |
| 456 | printf("'%s' is too small (%i bytes only).\n", fn_ip->filename, rc); |
| 457 | return -1; |
| 458 | } |
| 459 | |
| 460 | /* Check whether it is a configuration file instead of a kernel */ |
| 461 | if (rc < sizeof(cfgbuf) - 1) { |
| 462 | memcpy(cfgbuf, loadaddr, rc); |
| 463 | cfgbuf[rc] = 0; /* Make sure that it is NUL-terminated */ |
| 464 | if (!strncmp("* ", cfgbuf, 2)) { |
| 465 | return handle_ins_cfg(fn_ip, cfgbuf, rc); |
| 466 | } |
| 467 | /* |
| 468 | * pxelinux.cfg support via bootfile name is just here for developers' |
| 469 | * convenience (it eases testing with the built-in DHCP server of QEMU |
| 470 | * that does not support RFC 5071). The official way to configure a |
| 471 | * pxelinux.cfg file name is to use DHCP options 209 and 210 instead. |
| 472 | * So only use the pxelinux.cfg parser here for files that start with |
| 473 | * a magic comment string. |
| 474 | */ |
| 475 | if (!strncasecmp("# pxelinux", cfgbuf, 10)) { |
| 476 | struct pl_cfg_entry entries[PXECFG_MAX]; |
| 477 | int num_ent, def_ent = 0; |
| 478 | |
| 479 | num_ent = pxelinux_parse_cfg(cfgbuf, sizeof(cfgbuf), entries, |
| 480 | PXECFG_MAX, &def_ent); |
| 481 | return net_select_and_load_kernel(fn_ip, num_ent, def_ent, |
| 482 | entries); |
| 483 | } |
| 484 | } |
| 485 | |
| 486 | /* Move kernel to right location */ |
| 487 | memmove(KERNEL_ADDR, loadaddr, rc); |
| 488 | |
| 489 | return rc; |
| 490 | } |
| 491 | |
| 492 | static bool find_net_dev(Schib *schib, int dev_no) |
| 493 | { |
| 494 | int i, r; |
| 495 | |
| 496 | for (i = 0; i < 0x10000; i++) { |
| 497 | net_schid.sch_no = i; |
| 498 | r = stsch_err(net_schid, schib); |
| 499 | if (r == 3 || r == -EIO) { |
| 500 | break; |
| 501 | } |
| 502 | if (!schib->pmcw.dnv) { |
| 503 | continue; |
| 504 | } |
| 505 | enable_subchannel(net_schid); |
| 506 | if (!virtio_is_supported(virtio_get_device())) { |
| 507 | continue; |
| 508 | } |
| 509 | if (virtio_get_device_type() != VIRTIO_ID_NET) { |
| 510 | continue; |
| 511 | } |
| 512 | if (dev_no < 0 || schib->pmcw.dev == dev_no) { |
| 513 | return true; |
| 514 | } |
| 515 | } |
| 516 | |
| 517 | return false; |
| 518 | } |
| 519 | |
| 520 | static bool virtio_setup(void) |
| 521 | { |
| 522 | Schib schib; |
| 523 | int ssid; |
| 524 | bool found = false; |
| 525 | uint16_t dev_no; |
| 526 | |
| 527 | /* |
| 528 | * We unconditionally enable mss support. In every sane configuration, |
| 529 | * this will succeed; and even if it doesn't, stsch_err() can deal |
| 530 | * with the consequences. |
| 531 | */ |
| 532 | enable_mss_facility(); |
| 533 | |
| 534 | if (have_iplb || store_iplb(iplb)) { |
| 535 | IPL_assert(iplb->pbt == S390_IPL_TYPE_CCW, "IPL_TYPE_CCW expected"); |
| 536 | dev_no = iplb->ccw.devno; |
| 537 | debug_print_int("device no. ", dev_no); |
| 538 | net_schid.ssid = iplb->ccw.ssid & 0x3; |
| 539 | debug_print_int("ssid ", net_schid.ssid); |
| 540 | found = find_net_dev(&schib, dev_no); |
| 541 | } else { |
| 542 | for (ssid = 0; ssid < 0x3; ssid++) { |
| 543 | net_schid.ssid = ssid; |
| 544 | found = find_net_dev(&schib, -1); |
| 545 | if (found) { |
| 546 | break; |
| 547 | } |
| 548 | } |
| 549 | } |
| 550 | |
| 551 | return found; |
| 552 | } |
| 553 | |
| 554 | int netmain(void) |
| 555 | { |
| 556 | filename_ip_t fn_ip; |
| 557 | int rc, fnlen; |
| 558 | |
| 559 | sclp_setup(); |
| 560 | puts("Network boot starting..."); |
| 561 | |
| 562 | if (!virtio_setup()) { |
| 563 | puts("No virtio net device found."); |
| 564 | return -1; |
| 565 | } |
| 566 | |
| 567 | rc = net_init(&fn_ip); |
| 568 | if (rc) { |
| 569 | puts("Network initialization failed."); |
| 570 | return -1; |
| 571 | } |
| 572 | |
| 573 | fnlen = strlen(fn_ip.filename); |
| 574 | if (fnlen > 0 && fn_ip.filename[fnlen - 1] != '/') { |
| 575 | rc = net_try_direct_tftp_load(&fn_ip); |
| 576 | } |
| 577 | if (rc <= 0) { |
| 578 | rc = net_try_pxelinux_cfg(&fn_ip); |
| 579 | } |
| 580 | |
| 581 | net_release(&fn_ip); |
| 582 | |
| 583 | if (rc > 0) { |
| 584 | puts("Network loading done, starting kernel..."); |
| 585 | jump_to_low_kernel(); |
| 586 | } |
| 587 | |
| 588 | puts("Failed to load OS from network."); |
| 589 | return -1; |
| 590 | } |