| 1 | /* |
| 2 | * Copyright (c) 2006 The DragonFly Project. All rights reserved. |
| 3 | * |
| 4 | * This code is derived from software contributed to The DragonFly Project |
| 5 | * by Matthew Dillon <dillon@backplane.com> |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in |
| 15 | * the documentation and/or other materials provided with the |
| 16 | * distribution. |
| 17 | * 3. Neither the name of The DragonFly Project nor the names of its |
| 18 | * contributors may be used to endorse or promote products derived |
| 19 | * from this software without specific, prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 22 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 23 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 24 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 25 | * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 26 | * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 27 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 28 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 29 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 30 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 31 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | * |
| 34 | * $DragonFly: src/sys/platform/vkernel/platform/init.c,v 1.56 2008/05/27 07:48:00 dillon Exp $ |
| 35 | */ |
| 36 | |
| 37 | #include <sys/types.h> |
| 38 | #include <sys/systm.h> |
| 39 | #include <sys/kernel.h> |
| 40 | #include <sys/stat.h> |
| 41 | #include <sys/mman.h> |
| 42 | #include <sys/cons.h> |
| 43 | #include <sys/random.h> |
| 44 | #include <sys/vkernel.h> |
| 45 | #include <sys/tls.h> |
| 46 | #include <sys/reboot.h> |
| 47 | #include <sys/proc.h> |
| 48 | #include <sys/msgbuf.h> |
| 49 | #include <sys/vmspace.h> |
| 50 | #include <sys/socket.h> |
| 51 | #include <sys/sockio.h> |
| 52 | #include <sys/sysctl.h> |
| 53 | #include <sys/un.h> |
| 54 | #include <vm/vm_page.h> |
| 55 | #include <vm/vm_map.h> |
| 56 | #include <sys/mplock2.h> |
| 57 | |
| 58 | #include <machine/cpu.h> |
| 59 | #include <machine/globaldata.h> |
| 60 | #include <machine/tls.h> |
| 61 | #include <machine/md_var.h> |
| 62 | #include <machine/vmparam.h> |
| 63 | #include <cpu/specialreg.h> |
| 64 | |
| 65 | #include <net/if.h> |
| 66 | #include <net/if_arp.h> |
| 67 | #include <net/ethernet.h> |
| 68 | #include <net/bridge/if_bridgevar.h> |
| 69 | #include <netinet/in.h> |
| 70 | #include <arpa/inet.h> |
| 71 | |
| 72 | #include <stdio.h> |
| 73 | #include <stdlib.h> |
| 74 | #include <stdarg.h> |
| 75 | #include <stdbool.h> |
| 76 | #include <unistd.h> |
| 77 | #include <fcntl.h> |
| 78 | #include <string.h> |
| 79 | #include <err.h> |
| 80 | #include <errno.h> |
| 81 | #include <assert.h> |
| 82 | #include <sysexits.h> |
| 83 | |
| 84 | vm_paddr_t phys_avail[16]; |
| 85 | vm_paddr_t Maxmem; |
| 86 | vm_paddr_t Maxmem_bytes; |
| 87 | long physmem; |
| 88 | int MemImageFd = -1; |
| 89 | struct vkdisk_info DiskInfo[VKDISK_MAX]; |
| 90 | int DiskNum; |
| 91 | struct vknetif_info NetifInfo[VKNETIF_MAX]; |
| 92 | int NetifNum; |
| 93 | char *pid_file; |
| 94 | vm_offset_t KvaStart; |
| 95 | vm_offset_t KvaEnd; |
| 96 | vm_offset_t KvaSize; |
| 97 | vm_offset_t virtual_start; |
| 98 | vm_offset_t virtual_end; |
| 99 | vm_offset_t virtual2_start; |
| 100 | vm_offset_t virtual2_end; |
| 101 | vm_offset_t kernel_vm_end; |
| 102 | vm_offset_t crashdumpmap; |
| 103 | vm_offset_t clean_sva; |
| 104 | vm_offset_t clean_eva; |
| 105 | struct msgbuf *msgbufp; |
| 106 | caddr_t ptvmmap; |
| 107 | vpte_t *KernelPTD; |
| 108 | vpte_t *KernelPTA; /* Warning: Offset for direct VA translation */ |
| 109 | void *dmap_min_address; |
| 110 | u_int cpu_feature; /* XXX */ |
| 111 | int tsc_present; |
| 112 | int64_t tsc_frequency; |
| 113 | int optcpus; /* number of cpus - see mp_start() */ |
| 114 | int lwp_cpu_lock; /* if/how to lock virtual CPUs to real CPUs */ |
| 115 | int real_ncpus; /* number of real CPUs */ |
| 116 | int next_cpu; /* next real CPU to lock a virtual CPU to */ |
| 117 | |
| 118 | struct privatespace *CPU_prvspace; |
| 119 | |
| 120 | static struct trapframe proc0_tf; |
| 121 | static void *proc0paddr; |
| 122 | |
| 123 | static void init_sys_memory(char *imageFile); |
| 124 | static void init_kern_memory(void); |
| 125 | static void init_globaldata(void); |
| 126 | static void init_vkernel(void); |
| 127 | static void init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type); |
| 128 | static void init_netif(char *netifExp[], int netifFileNum); |
| 129 | static void writepid(void); |
| 130 | static void cleanpid(void); |
| 131 | static int unix_connect(const char *path); |
| 132 | static void usage_err(const char *ctl, ...); |
| 133 | static void usage_help(_Bool); |
| 134 | |
| 135 | static int save_ac; |
| 136 | static char **save_av; |
| 137 | |
| 138 | /* |
| 139 | * Kernel startup for virtual kernels - standard main() |
| 140 | */ |
| 141 | int |
| 142 | main(int ac, char **av) |
| 143 | { |
| 144 | char *memImageFile = NULL; |
| 145 | char *netifFile[VKNETIF_MAX]; |
| 146 | char *diskFile[VKDISK_MAX]; |
| 147 | char *cdFile[VKDISK_MAX]; |
| 148 | char *suffix; |
| 149 | char *endp; |
| 150 | int netifFileNum = 0; |
| 151 | int diskFileNum = 0; |
| 152 | int cdFileNum = 0; |
| 153 | int bootOnDisk = -1; /* set below to vcd (0) or vkd (1) */ |
| 154 | int c; |
| 155 | int i; |
| 156 | int j; |
| 157 | int n; |
| 158 | int isq; |
| 159 | int real_vkernel_enable; |
| 160 | int supports_sse; |
| 161 | size_t vsize; |
| 162 | |
| 163 | save_ac = ac; |
| 164 | save_av = av; |
| 165 | |
| 166 | /* |
| 167 | * Process options |
| 168 | */ |
| 169 | kernel_mem_readonly = 1; |
| 170 | #ifdef SMP |
| 171 | optcpus = 2; |
| 172 | #endif |
| 173 | lwp_cpu_lock = LCL_NONE; |
| 174 | |
| 175 | real_vkernel_enable = 0; |
| 176 | vsize = sizeof(real_vkernel_enable); |
| 177 | sysctlbyname("vm.vkernel_enable", &real_vkernel_enable, &vsize, NULL,0); |
| 178 | |
| 179 | if (real_vkernel_enable == 0) { |
| 180 | errx(1, "vm.vkernel_enable is 0, must be set " |
| 181 | "to 1 to execute a vkernel!"); |
| 182 | } |
| 183 | |
| 184 | real_ncpus = 1; |
| 185 | vsize = sizeof(real_ncpus); |
| 186 | sysctlbyname("hw.ncpu", &real_ncpus, &vsize, NULL, 0); |
| 187 | |
| 188 | if (ac < 2) |
| 189 | usage_help(false); |
| 190 | |
| 191 | while ((c = getopt(ac, av, "c:hsvl:m:n:r:e:i:p:I:U")) != -1) { |
| 192 | switch(c) { |
| 193 | case 'e': |
| 194 | /* |
| 195 | * name=value:name=value:name=value... |
| 196 | * name="value"... |
| 197 | * |
| 198 | * Allow values to be quoted but note that shells |
| 199 | * may remove the quotes, so using this feature |
| 200 | * to embed colons may require a backslash. |
| 201 | */ |
| 202 | n = strlen(optarg); |
| 203 | isq = 0; |
| 204 | kern_envp = malloc(n + 2); |
| 205 | for (i = j = 0; i < n; ++i) { |
| 206 | if (optarg[i] == '"') |
| 207 | isq ^= 1; |
| 208 | else if (optarg[i] == '\'') |
| 209 | isq ^= 2; |
| 210 | else if (isq == 0 && optarg[i] == ':') |
| 211 | kern_envp[j++] = 0; |
| 212 | else |
| 213 | kern_envp[j++] = optarg[i]; |
| 214 | } |
| 215 | kern_envp[j++] = 0; |
| 216 | kern_envp[j++] = 0; |
| 217 | break; |
| 218 | case 's': |
| 219 | boothowto |= RB_SINGLE; |
| 220 | break; |
| 221 | case 'v': |
| 222 | bootverbose = 1; |
| 223 | break; |
| 224 | case 'i': |
| 225 | memImageFile = optarg; |
| 226 | break; |
| 227 | case 'I': |
| 228 | if (netifFileNum < VKNETIF_MAX) |
| 229 | netifFile[netifFileNum++] = strdup(optarg); |
| 230 | break; |
| 231 | case 'r': |
| 232 | if (bootOnDisk < 0) |
| 233 | bootOnDisk = 1; |
| 234 | if (diskFileNum + cdFileNum < VKDISK_MAX) |
| 235 | diskFile[diskFileNum++] = strdup(optarg); |
| 236 | break; |
| 237 | case 'c': |
| 238 | if (bootOnDisk < 0) |
| 239 | bootOnDisk = 0; |
| 240 | if (diskFileNum + cdFileNum < VKDISK_MAX) |
| 241 | cdFile[cdFileNum++] = strdup(optarg); |
| 242 | break; |
| 243 | case 'm': |
| 244 | Maxmem_bytes = strtoull(optarg, &suffix, 0); |
| 245 | if (suffix) { |
| 246 | switch(*suffix) { |
| 247 | case 'g': |
| 248 | case 'G': |
| 249 | Maxmem_bytes <<= 30; |
| 250 | break; |
| 251 | case 'm': |
| 252 | case 'M': |
| 253 | Maxmem_bytes <<= 20; |
| 254 | break; |
| 255 | case 'k': |
| 256 | case 'K': |
| 257 | Maxmem_bytes <<= 10; |
| 258 | break; |
| 259 | default: |
| 260 | Maxmem_bytes = 0; |
| 261 | usage_err("Bad maxmem option"); |
| 262 | /* NOT REACHED */ |
| 263 | break; |
| 264 | } |
| 265 | } |
| 266 | break; |
| 267 | case 'l': |
| 268 | next_cpu = -1; |
| 269 | if (strncmp("map", optarg, 3) == 0) { |
| 270 | lwp_cpu_lock = LCL_PER_CPU; |
| 271 | if (optarg[3] == ',') { |
| 272 | next_cpu = strtol(optarg+4, &endp, 0); |
| 273 | if (*endp != '\0') |
| 274 | usage_err("Bad target CPU number at '%s'", endp); |
| 275 | } else { |
| 276 | next_cpu = 0; |
| 277 | } |
| 278 | if (next_cpu < 0 || next_cpu > real_ncpus - 1) |
| 279 | usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1); |
| 280 | } else if (strncmp("any", optarg, 3) == 0) { |
| 281 | lwp_cpu_lock = LCL_NONE; |
| 282 | } else { |
| 283 | lwp_cpu_lock = LCL_SINGLE_CPU; |
| 284 | next_cpu = strtol(optarg, &endp, 0); |
| 285 | if (*endp != '\0') |
| 286 | usage_err("Bad target CPU number at '%s'", endp); |
| 287 | if (next_cpu < 0 || next_cpu > real_ncpus - 1) |
| 288 | usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1); |
| 289 | } |
| 290 | break; |
| 291 | case 'n': |
| 292 | /* |
| 293 | * This value is set up by mp_start(), don't just |
| 294 | * set ncpus here. |
| 295 | */ |
| 296 | #ifdef SMP |
| 297 | optcpus = strtol(optarg, NULL, 0); |
| 298 | if (optcpus < 1 || optcpus > MAXCPU) |
| 299 | usage_err("Bad ncpus, valid range is 1-%d", MAXCPU); |
| 300 | #else |
| 301 | if (strtol(optarg, NULL, 0) != 1) { |
| 302 | usage_err("You built a UP vkernel, only 1 cpu!"); |
| 303 | } |
| 304 | #endif |
| 305 | |
| 306 | break; |
| 307 | case 'p': |
| 308 | pid_file = optarg; |
| 309 | break; |
| 310 | case 'U': |
| 311 | kernel_mem_readonly = 0; |
| 312 | break; |
| 313 | case 'h': |
| 314 | usage_help(true); |
| 315 | break; |
| 316 | default: |
| 317 | usage_help(false); |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | writepid(); |
| 322 | cpu_disable_intr(); |
| 323 | init_sys_memory(memImageFile); |
| 324 | init_kern_memory(); |
| 325 | init_globaldata(); |
| 326 | init_vkernel(); |
| 327 | setrealcpu(); |
| 328 | init_kqueue(); |
| 329 | |
| 330 | /* |
| 331 | * Check TSC |
| 332 | */ |
| 333 | vsize = sizeof(tsc_present); |
| 334 | sysctlbyname("hw.tsc_present", &tsc_present, &vsize, NULL, 0); |
| 335 | vsize = sizeof(tsc_frequency); |
| 336 | sysctlbyname("hw.tsc_frequency", &tsc_frequency, &vsize, NULL, 0); |
| 337 | if (tsc_present) |
| 338 | cpu_feature |= CPUID_TSC; |
| 339 | |
| 340 | /* |
| 341 | * Check SSE |
| 342 | */ |
| 343 | vsize = sizeof(supports_sse); |
| 344 | supports_sse = 0; |
| 345 | sysctlbyname("hw.instruction_sse", &supports_sse, &vsize, NULL, 0); |
| 346 | init_fpu(supports_sse); |
| 347 | if (supports_sse) |
| 348 | cpu_feature |= CPUID_SSE | CPUID_FXSR; |
| 349 | |
| 350 | /* |
| 351 | * We boot from the first installed disk. |
| 352 | */ |
| 353 | if (bootOnDisk == 1) { |
| 354 | init_disk(diskFile, diskFileNum, VKD_DISK); |
| 355 | init_disk(cdFile, cdFileNum, VKD_CD); |
| 356 | } else { |
| 357 | init_disk(cdFile, cdFileNum, VKD_CD); |
| 358 | init_disk(diskFile, diskFileNum, VKD_DISK); |
| 359 | } |
| 360 | init_netif(netifFile, netifFileNum); |
| 361 | init_exceptions(); |
| 362 | mi_startup(); |
| 363 | /* NOT REACHED */ |
| 364 | exit(EX_SOFTWARE); |
| 365 | } |
| 366 | |
| 367 | /* |
| 368 | * Initialize system memory. This is the virtual kernel's 'RAM'. |
| 369 | */ |
| 370 | static |
| 371 | void |
| 372 | init_sys_memory(char *imageFile) |
| 373 | { |
| 374 | struct stat st; |
| 375 | int i; |
| 376 | int fd; |
| 377 | |
| 378 | /* |
| 379 | * Figure out the system memory image size. If an image file was |
| 380 | * specified and -m was not specified, use the image file's size. |
| 381 | */ |
| 382 | if (imageFile && stat(imageFile, &st) == 0 && Maxmem_bytes == 0) |
| 383 | Maxmem_bytes = (vm_paddr_t)st.st_size; |
| 384 | if ((imageFile == NULL || stat(imageFile, &st) < 0) && |
| 385 | Maxmem_bytes == 0) { |
| 386 | errx(1, "Cannot create new memory file %s unless " |
| 387 | "system memory size is specified with -m", |
| 388 | imageFile); |
| 389 | /* NOT REACHED */ |
| 390 | } |
| 391 | |
| 392 | /* |
| 393 | * Maxmem must be known at this time |
| 394 | */ |
| 395 | if (Maxmem_bytes < 64 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) { |
| 396 | errx(1, "Bad maxmem specification: 64MB minimum, " |
| 397 | "multiples of %dMB only", |
| 398 | SEG_SIZE / 1024 / 1024); |
| 399 | /* NOT REACHED */ |
| 400 | } |
| 401 | |
| 402 | /* |
| 403 | * Generate an image file name if necessary, then open/create the |
| 404 | * file exclusively locked. Do not allow multiple virtual kernels |
| 405 | * to use the same image file. |
| 406 | * |
| 407 | * Don't iterate through a million files if we do not have write |
| 408 | * access to the directory, stop if our open() failed on a |
| 409 | * non-existant file. Otherwise opens can fail for any number |
| 410 | */ |
| 411 | if (imageFile == NULL) { |
| 412 | for (i = 0; i < 1000000; ++i) { |
| 413 | asprintf(&imageFile, "/var/vkernel/memimg.%06d", i); |
| 414 | fd = open(imageFile, |
| 415 | O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644); |
| 416 | if (fd < 0 && stat(imageFile, &st) == 0) { |
| 417 | free(imageFile); |
| 418 | continue; |
| 419 | } |
| 420 | break; |
| 421 | } |
| 422 | } else { |
| 423 | fd = open(imageFile, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644); |
| 424 | } |
| 425 | fprintf(stderr, "Using memory file: %s\n", imageFile); |
| 426 | if (fd < 0 || fstat(fd, &st) < 0) { |
| 427 | err(1, "Unable to open/create %s", imageFile); |
| 428 | /* NOT REACHED */ |
| 429 | } |
| 430 | |
| 431 | /* |
| 432 | * Truncate or extend the file as necessary. Clean out the contents |
| 433 | * of the file, we want it to be full of holes so we don't waste |
| 434 | * time reading in data from an old file that we no longer care |
| 435 | * about. |
| 436 | */ |
| 437 | ftruncate(fd, 0); |
| 438 | ftruncate(fd, Maxmem_bytes); |
| 439 | |
| 440 | MemImageFd = fd; |
| 441 | Maxmem = Maxmem_bytes >> PAGE_SHIFT; |
| 442 | physmem = Maxmem; |
| 443 | } |
| 444 | |
| 445 | /* |
| 446 | * Initialize kernel memory. This reserves kernel virtual memory by using |
| 447 | * MAP_VPAGETABLE |
| 448 | */ |
| 449 | |
| 450 | static |
| 451 | void |
| 452 | init_kern_memory(void) |
| 453 | { |
| 454 | void *base; |
| 455 | void *try; |
| 456 | char dummy; |
| 457 | char *topofstack = &dummy; |
| 458 | int i; |
| 459 | void *firstfree; |
| 460 | |
| 461 | /* |
| 462 | * Memory map our kernel virtual memory space. Note that the |
| 463 | * kernel image itself is not made part of this memory for the |
| 464 | * moment. |
| 465 | * |
| 466 | * The memory map must be segment-aligned so we can properly |
| 467 | * offset KernelPTD. |
| 468 | * |
| 469 | * If the system kernel has a different MAXDSIZ, it might not |
| 470 | * be possible to map kernel memory in its prefered location. |
| 471 | * Try a number of different locations. |
| 472 | */ |
| 473 | try = (void *)(512UL << 30); |
| 474 | base = NULL; |
| 475 | while ((char *)try + KERNEL_KVA_SIZE < topofstack) { |
| 476 | base = mmap(try, KERNEL_KVA_SIZE, PROT_READ|PROT_WRITE, |
| 477 | MAP_FILE|MAP_SHARED|MAP_VPAGETABLE, |
| 478 | MemImageFd, (off_t)try); |
| 479 | if (base == try) |
| 480 | break; |
| 481 | if (base != MAP_FAILED) |
| 482 | munmap(base, KERNEL_KVA_SIZE); |
| 483 | try = (char *)try + (512UL << 30); |
| 484 | } |
| 485 | if (base != try) { |
| 486 | err(1, "Unable to mmap() kernel virtual memory!"); |
| 487 | /* NOT REACHED */ |
| 488 | } |
| 489 | madvise(base, KERNEL_KVA_SIZE, MADV_NOSYNC); |
| 490 | KvaStart = (vm_offset_t)base; |
| 491 | KvaSize = KERNEL_KVA_SIZE; |
| 492 | KvaEnd = KvaStart + KvaSize; |
| 493 | |
| 494 | /* cannot use kprintf yet */ |
| 495 | printf("KVM mapped at %p-%p\n", (void *)KvaStart, (void *)KvaEnd); |
| 496 | |
| 497 | /* MAP_FILE? */ |
| 498 | dmap_min_address = mmap(0, DMAP_SIZE, PROT_READ|PROT_WRITE, |
| 499 | MAP_NOCORE|MAP_NOSYNC|MAP_SHARED, |
| 500 | MemImageFd, 0); |
| 501 | if (dmap_min_address == MAP_FAILED) { |
| 502 | err(1, "Unable to mmap() kernel DMAP region!"); |
| 503 | /* NOT REACHED */ |
| 504 | } |
| 505 | |
| 506 | firstfree = 0; |
| 507 | pmap_bootstrap((vm_paddr_t *)&firstfree, (int64_t)base); |
| 508 | |
| 509 | mcontrol(base, KERNEL_KVA_SIZE, MADV_SETMAP, |
| 510 | 0 | VPTE_R | VPTE_W | VPTE_V); |
| 511 | |
| 512 | /* |
| 513 | * phys_avail[] represents unallocated physical memory. MI code |
| 514 | * will use phys_avail[] to create the vm_page array. |
| 515 | */ |
| 516 | phys_avail[0] = (vm_paddr_t)firstfree; |
| 517 | phys_avail[0] = (phys_avail[0] + PAGE_MASK) & ~(vm_paddr_t)PAGE_MASK; |
| 518 | phys_avail[1] = Maxmem_bytes; |
| 519 | |
| 520 | #if JGV |
| 521 | /* |
| 522 | * (virtual_start, virtual_end) represent unallocated kernel virtual |
| 523 | * memory. MI code will create kernel_map using these parameters. |
| 524 | */ |
| 525 | virtual_start = KvaStart + (long)firstfree; |
| 526 | virtual_start = (virtual_start + PAGE_MASK) & ~(vm_offset_t)PAGE_MASK; |
| 527 | virtual_end = KvaStart + KERNEL_KVA_SIZE; |
| 528 | #endif |
| 529 | |
| 530 | /* |
| 531 | * pmap_growkernel() will set the correct value. |
| 532 | */ |
| 533 | kernel_vm_end = 0; |
| 534 | |
| 535 | /* |
| 536 | * Allocate space for process 0's UAREA. |
| 537 | */ |
| 538 | proc0paddr = (void *)virtual_start; |
| 539 | for (i = 0; i < UPAGES; ++i) { |
| 540 | pmap_kenter_quick(virtual_start, phys_avail[0]); |
| 541 | virtual_start += PAGE_SIZE; |
| 542 | phys_avail[0] += PAGE_SIZE; |
| 543 | } |
| 544 | |
| 545 | /* |
| 546 | * crashdumpmap |
| 547 | */ |
| 548 | crashdumpmap = virtual_start; |
| 549 | virtual_start += MAXDUMPPGS * PAGE_SIZE; |
| 550 | |
| 551 | /* |
| 552 | * msgbufp maps the system message buffer |
| 553 | */ |
| 554 | assert((MSGBUF_SIZE & PAGE_MASK) == 0); |
| 555 | msgbufp = (void *)virtual_start; |
| 556 | for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) { |
| 557 | pmap_kenter_quick(virtual_start, phys_avail[0]); |
| 558 | virtual_start += PAGE_SIZE; |
| 559 | phys_avail[0] += PAGE_SIZE; |
| 560 | } |
| 561 | msgbufinit(msgbufp, MSGBUF_SIZE); |
| 562 | |
| 563 | /* |
| 564 | * used by kern_memio for /dev/mem access |
| 565 | */ |
| 566 | ptvmmap = (caddr_t)virtual_start; |
| 567 | virtual_start += PAGE_SIZE; |
| 568 | |
| 569 | /* |
| 570 | * Bootstrap the kernel_pmap |
| 571 | */ |
| 572 | #if JGV |
| 573 | pmap_bootstrap(); |
| 574 | #endif |
| 575 | } |
| 576 | |
| 577 | /* |
| 578 | * Map the per-cpu globaldata for cpu #0. Allocate the space using |
| 579 | * virtual_start and phys_avail[0] |
| 580 | */ |
| 581 | static |
| 582 | void |
| 583 | init_globaldata(void) |
| 584 | { |
| 585 | int i; |
| 586 | vm_paddr_t pa; |
| 587 | vm_offset_t va; |
| 588 | |
| 589 | /* |
| 590 | * Reserve enough KVA to cover possible cpus. This is a considerable |
| 591 | * amount of KVA since the privatespace structure includes two |
| 592 | * whole page table mappings. |
| 593 | */ |
| 594 | virtual_start = (virtual_start + SEG_MASK) & ~(vm_offset_t)SEG_MASK; |
| 595 | CPU_prvspace = (void *)virtual_start; |
| 596 | virtual_start += sizeof(struct privatespace) * SMP_MAXCPU; |
| 597 | |
| 598 | /* |
| 599 | * Allocate enough physical memory to cover the mdglobaldata |
| 600 | * portion of the space and the idle stack and map the pages |
| 601 | * into KVA. For cpu #0 only. |
| 602 | */ |
| 603 | for (i = 0; i < sizeof(struct mdglobaldata); i += PAGE_SIZE) { |
| 604 | pa = phys_avail[0]; |
| 605 | va = (vm_offset_t)&CPU_prvspace[0].mdglobaldata + i; |
| 606 | pmap_kenter_quick(va, pa); |
| 607 | phys_avail[0] += PAGE_SIZE; |
| 608 | } |
| 609 | for (i = 0; i < sizeof(CPU_prvspace[0].idlestack); i += PAGE_SIZE) { |
| 610 | pa = phys_avail[0]; |
| 611 | va = (vm_offset_t)&CPU_prvspace[0].idlestack + i; |
| 612 | pmap_kenter_quick(va, pa); |
| 613 | phys_avail[0] += PAGE_SIZE; |
| 614 | } |
| 615 | |
| 616 | /* |
| 617 | * Setup the %gs for cpu #0. The mycpu macro works after this |
| 618 | * point. Note that %fs is used by pthreads. |
| 619 | */ |
| 620 | tls_set_gs(&CPU_prvspace[0], sizeof(struct privatespace)); |
| 621 | } |
| 622 | |
| 623 | /* |
| 624 | * Initialize very low level systems including thread0, proc0, etc. |
| 625 | */ |
| 626 | static |
| 627 | void |
| 628 | init_vkernel(void) |
| 629 | { |
| 630 | struct mdglobaldata *gd; |
| 631 | |
| 632 | gd = &CPU_prvspace[0].mdglobaldata; |
| 633 | bzero(gd, sizeof(*gd)); |
| 634 | |
| 635 | gd->mi.gd_curthread = &thread0; |
| 636 | thread0.td_gd = &gd->mi; |
| 637 | ncpus = 1; |
| 638 | ncpus2 = 1; /* rounded down power of 2 */ |
| 639 | ncpus_fit = 1; /* rounded up power of 2 */ |
| 640 | /* ncpus2_mask and ncpus_fit_mask are 0 */ |
| 641 | init_param1(); |
| 642 | gd->mi.gd_prvspace = &CPU_prvspace[0]; |
| 643 | mi_gdinit(&gd->mi, 0); |
| 644 | cpu_gdinit(gd, 0); |
| 645 | mi_proc0init(&gd->mi, proc0paddr); |
| 646 | lwp0.lwp_md.md_regs = &proc0_tf; |
| 647 | |
| 648 | /*init_locks();*/ |
| 649 | #ifdef SMP |
| 650 | /* |
| 651 | * Get the initial mplock with a count of 1 for the BSP. |
| 652 | * This uses a LOGICAL cpu ID, ie BSP == 0. |
| 653 | */ |
| 654 | cpu_get_initial_mplock(); |
| 655 | #endif |
| 656 | cninit(); |
| 657 | rand_initialize(); |
| 658 | #if 0 /* #ifdef DDB */ |
| 659 | kdb_init(); |
| 660 | if (boothowto & RB_KDB) |
| 661 | Debugger("Boot flags requested debugger"); |
| 662 | #endif |
| 663 | identcpu(); |
| 664 | #if 0 |
| 665 | initializecpu(); /* Initialize CPU registers */ |
| 666 | #endif |
| 667 | init_param2((phys_avail[1] - phys_avail[0]) / PAGE_SIZE); |
| 668 | |
| 669 | #if 0 |
| 670 | /* |
| 671 | * Map the message buffer |
| 672 | */ |
| 673 | for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE) |
| 674 | pmap_kenter((vm_offset_t)msgbufp + off, avail_end + off); |
| 675 | msgbufinit(msgbufp, MSGBUF_SIZE); |
| 676 | #endif |
| 677 | #if 0 |
| 678 | thread0.td_pcb_cr3 ... MMU |
| 679 | lwp0.lwp_md.md_regs = &proc0_tf; |
| 680 | #endif |
| 681 | } |
| 682 | |
| 683 | /* |
| 684 | * Filesystem image paths for the virtual kernel are optional. |
| 685 | * If specified they each should point to a disk image, |
| 686 | * the first of which will become the root disk. |
| 687 | * |
| 688 | * The virtual kernel caches data from our 'disk' just like a normal kernel, |
| 689 | * so we do not really want the real kernel to cache the data too. Use |
| 690 | * O_DIRECT to remove the duplication. |
| 691 | */ |
| 692 | static |
| 693 | void |
| 694 | init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type) |
| 695 | { |
| 696 | int i; |
| 697 | |
| 698 | if (diskFileNum == 0) |
| 699 | return; |
| 700 | |
| 701 | for(i=0; i < diskFileNum; i++){ |
| 702 | char *fname; |
| 703 | fname = diskExp[i]; |
| 704 | |
| 705 | if (fname == NULL) { |
| 706 | warnx("Invalid argument to '-r'"); |
| 707 | continue; |
| 708 | } |
| 709 | |
| 710 | if (DiskNum < VKDISK_MAX) { |
| 711 | struct stat st; |
| 712 | struct vkdisk_info* info = NULL; |
| 713 | int fd; |
| 714 | size_t l = 0; |
| 715 | |
| 716 | if (type == VKD_DISK) |
| 717 | fd = open(fname, O_RDWR|O_DIRECT, 0644); |
| 718 | else |
| 719 | fd = open(fname, O_RDONLY|O_DIRECT, 0644); |
| 720 | if (fd < 0 || fstat(fd, &st) < 0) { |
| 721 | err(1, "Unable to open/create %s", fname); |
| 722 | /* NOT REACHED */ |
| 723 | } |
| 724 | if (S_ISREG(st.st_mode)) { |
| 725 | if (flock(fd, LOCK_EX|LOCK_NB) < 0) { |
| 726 | errx(1, "Disk image %s is already " |
| 727 | "in use\n", fname); |
| 728 | /* NOT REACHED */ |
| 729 | } |
| 730 | } |
| 731 | |
| 732 | info = &DiskInfo[DiskNum]; |
| 733 | l = strlen(fname); |
| 734 | |
| 735 | info->unit = i; |
| 736 | info->fd = fd; |
| 737 | info->type = type; |
| 738 | memcpy(info->fname, fname, l); |
| 739 | |
| 740 | if (DiskNum == 0) { |
| 741 | if (type == VKD_CD) { |
| 742 | rootdevnames[0] = "cd9660:vcd0a"; |
| 743 | } else if (type == VKD_DISK) { |
| 744 | rootdevnames[0] = "ufs:vkd0s0a"; |
| 745 | rootdevnames[1] = "ufs:vkd0s1a"; |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | DiskNum++; |
| 750 | } else { |
| 751 | warnx("vkd%d (%s) > VKDISK_MAX", DiskNum, fname); |
| 752 | continue; |
| 753 | } |
| 754 | } |
| 755 | } |
| 756 | |
| 757 | static |
| 758 | int |
| 759 | netif_set_tapflags(int tap_unit, int f, int s) |
| 760 | { |
| 761 | struct ifreq ifr; |
| 762 | int flags; |
| 763 | |
| 764 | bzero(&ifr, sizeof(ifr)); |
| 765 | |
| 766 | snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit); |
| 767 | if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) { |
| 768 | warn("tap%d: ioctl(SIOCGIFFLAGS) failed", tap_unit); |
| 769 | return -1; |
| 770 | } |
| 771 | |
| 772 | /* |
| 773 | * Adjust if_flags |
| 774 | * |
| 775 | * If the flags are already set/cleared, then we return |
| 776 | * immediately to avoid extra syscalls |
| 777 | */ |
| 778 | flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16); |
| 779 | if (f < 0) { |
| 780 | /* Turn off flags */ |
| 781 | f = -f; |
| 782 | if ((flags & f) == 0) |
| 783 | return 0; |
| 784 | flags &= ~f; |
| 785 | } else { |
| 786 | /* Turn on flags */ |
| 787 | if (flags & f) |
| 788 | return 0; |
| 789 | flags |= f; |
| 790 | } |
| 791 | |
| 792 | /* |
| 793 | * Fix up ifreq.ifr_name, since it may be trashed |
| 794 | * in previous ioctl(SIOCGIFFLAGS) |
| 795 | */ |
| 796 | snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit); |
| 797 | |
| 798 | ifr.ifr_flags = flags & 0xffff; |
| 799 | ifr.ifr_flagshigh = flags >> 16; |
| 800 | if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) { |
| 801 | warn("tap%d: ioctl(SIOCSIFFLAGS) failed", tap_unit); |
| 802 | return -1; |
| 803 | } |
| 804 | return 0; |
| 805 | } |
| 806 | |
| 807 | static |
| 808 | int |
| 809 | netif_set_tapaddr(int tap_unit, in_addr_t addr, in_addr_t mask, int s) |
| 810 | { |
| 811 | struct ifaliasreq ifra; |
| 812 | struct sockaddr_in *in; |
| 813 | |
| 814 | bzero(&ifra, sizeof(ifra)); |
| 815 | snprintf(ifra.ifra_name, sizeof(ifra.ifra_name), "tap%d", tap_unit); |
| 816 | |
| 817 | /* Setup address */ |
| 818 | in = (struct sockaddr_in *)&ifra.ifra_addr; |
| 819 | in->sin_family = AF_INET; |
| 820 | in->sin_len = sizeof(*in); |
| 821 | in->sin_addr.s_addr = addr; |
| 822 | |
| 823 | if (mask != 0) { |
| 824 | /* Setup netmask */ |
| 825 | in = (struct sockaddr_in *)&ifra.ifra_mask; |
| 826 | in->sin_len = sizeof(*in); |
| 827 | in->sin_addr.s_addr = mask; |
| 828 | } |
| 829 | |
| 830 | if (ioctl(s, SIOCAIFADDR, &ifra) < 0) { |
| 831 | warn("tap%d: ioctl(SIOCAIFADDR) failed", tap_unit); |
| 832 | return -1; |
| 833 | } |
| 834 | return 0; |
| 835 | } |
| 836 | |
| 837 | static |
| 838 | int |
| 839 | netif_add_tap2brg(int tap_unit, const char *ifbridge, int s) |
| 840 | { |
| 841 | struct ifbreq ifbr; |
| 842 | struct ifdrv ifd; |
| 843 | |
| 844 | bzero(&ifbr, sizeof(ifbr)); |
| 845 | snprintf(ifbr.ifbr_ifsname, sizeof(ifbr.ifbr_ifsname), |
| 846 | "tap%d", tap_unit); |
| 847 | |
| 848 | bzero(&ifd, sizeof(ifd)); |
| 849 | strlcpy(ifd.ifd_name, ifbridge, sizeof(ifd.ifd_name)); |
| 850 | ifd.ifd_cmd = BRDGADD; |
| 851 | ifd.ifd_len = sizeof(ifbr); |
| 852 | ifd.ifd_data = &ifbr; |
| 853 | |
| 854 | if (ioctl(s, SIOCSDRVSPEC, &ifd) < 0) { |
| 855 | /* |
| 856 | * 'errno == EEXIST' means that the tap(4) is already |
| 857 | * a member of the bridge(4) |
| 858 | */ |
| 859 | if (errno != EEXIST) { |
| 860 | warn("ioctl(%s, SIOCSDRVSPEC) failed", ifbridge); |
| 861 | return -1; |
| 862 | } |
| 863 | } |
| 864 | return 0; |
| 865 | } |
| 866 | |
| 867 | #define TAPDEV_OFLAGS (O_RDWR | O_NONBLOCK) |
| 868 | |
| 869 | /* |
| 870 | * Locate the first unused tap(4) device file if auto mode is requested, |
| 871 | * or open the user supplied device file, and bring up the corresponding |
| 872 | * tap(4) interface. |
| 873 | * |
| 874 | * NOTE: Only tap(4) device file is supported currently |
| 875 | */ |
| 876 | static |
| 877 | int |
| 878 | netif_open_tap(const char *netif, int *tap_unit, int s) |
| 879 | { |
| 880 | char tap_dev[MAXPATHLEN]; |
| 881 | int tap_fd, failed; |
| 882 | struct stat st; |
| 883 | char *dname; |
| 884 | |
| 885 | *tap_unit = -1; |
| 886 | |
| 887 | if (strcmp(netif, "auto") == 0) { |
| 888 | /* |
| 889 | * Find first unused tap(4) device file |
| 890 | */ |
| 891 | tap_fd = open("/dev/tap", TAPDEV_OFLAGS); |
| 892 | if (tap_fd < 0) { |
| 893 | warnc(errno, "Unable to find a free tap(4)"); |
| 894 | return -1; |
| 895 | } |
| 896 | } else { |
| 897 | /* |
| 898 | * User supplied tap(4) device file or unix socket. |
| 899 | */ |
| 900 | if (netif[0] == '/') /* Absolute path */ |
| 901 | strlcpy(tap_dev, netif, sizeof(tap_dev)); |
| 902 | else |
| 903 | snprintf(tap_dev, sizeof(tap_dev), "/dev/%s", netif); |
| 904 | |
| 905 | tap_fd = open(tap_dev, TAPDEV_OFLAGS); |
| 906 | |
| 907 | /* |
| 908 | * If we cannot open normally try to connect to it. |
| 909 | */ |
| 910 | if (tap_fd < 0) |
| 911 | tap_fd = unix_connect(tap_dev); |
| 912 | |
| 913 | if (tap_fd < 0) { |
| 914 | warn("Unable to open %s", tap_dev); |
| 915 | return -1; |
| 916 | } |
| 917 | } |
| 918 | |
| 919 | /* |
| 920 | * Check whether the device file is a tap(4) |
| 921 | */ |
| 922 | if (fstat(tap_fd, &st) < 0) { |
| 923 | failed = 1; |
| 924 | } else if (S_ISCHR(st.st_mode)) { |
| 925 | dname = fdevname(tap_fd); |
| 926 | if (dname) |
| 927 | dname = strstr(dname, "tap"); |
| 928 | if (dname) { |
| 929 | /* |
| 930 | * Bring up the corresponding tap(4) interface |
| 931 | */ |
| 932 | *tap_unit = strtol(dname + 3, NULL, 10); |
| 933 | printf("TAP UNIT %d\n", *tap_unit); |
| 934 | if (netif_set_tapflags(*tap_unit, IFF_UP, s) == 0) |
| 935 | failed = 0; |
| 936 | else |
| 937 | failed = 1; |
| 938 | } else { |
| 939 | failed = 1; |
| 940 | } |
| 941 | } else if (S_ISSOCK(st.st_mode)) { |
| 942 | /* |
| 943 | * Special socket connection (typically to vknet). We |
| 944 | * do not have to do anything. |
| 945 | */ |
| 946 | failed = 0; |
| 947 | } else { |
| 948 | failed = 1; |
| 949 | } |
| 950 | |
| 951 | if (failed) { |
| 952 | warnx("%s is not a tap(4) device or socket", tap_dev); |
| 953 | close(tap_fd); |
| 954 | tap_fd = -1; |
| 955 | *tap_unit = -1; |
| 956 | } |
| 957 | return tap_fd; |
| 958 | } |
| 959 | |
| 960 | static int |
| 961 | unix_connect(const char *path) |
| 962 | { |
| 963 | struct sockaddr_un sunx; |
| 964 | int len; |
| 965 | int net_fd; |
| 966 | int sndbuf = 262144; |
| 967 | struct stat st; |
| 968 | |
| 969 | snprintf(sunx.sun_path, sizeof(sunx.sun_path), "%s", path); |
| 970 | len = offsetof(struct sockaddr_un, sun_path[strlen(sunx.sun_path)]); |
| 971 | ++len; /* include nul */ |
| 972 | sunx.sun_family = AF_UNIX; |
| 973 | sunx.sun_len = len; |
| 974 | |
| 975 | net_fd = socket(AF_UNIX, SOCK_SEQPACKET, 0); |
| 976 | if (net_fd < 0) |
| 977 | return(-1); |
| 978 | if (connect(net_fd, (void *)&sunx, len) < 0) { |
| 979 | close(net_fd); |
| 980 | return(-1); |
| 981 | } |
| 982 | setsockopt(net_fd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(sndbuf)); |
| 983 | if (fstat(net_fd, &st) == 0) |
| 984 | printf("Network socket buffer: %d bytes\n", st.st_blksize); |
| 985 | fcntl(net_fd, F_SETFL, O_NONBLOCK); |
| 986 | return(net_fd); |
| 987 | } |
| 988 | |
| 989 | #undef TAPDEV_MAJOR |
| 990 | #undef TAPDEV_MINOR |
| 991 | #undef TAPDEV_OFLAGS |
| 992 | |
| 993 | /* |
| 994 | * Following syntax is supported, |
| 995 | * 1) x.x.x.x tap(4)'s address is x.x.x.x |
| 996 | * |
| 997 | * 2) x.x.x.x/z tap(4)'s address is x.x.x.x |
| 998 | * tap(4)'s netmask len is z |
| 999 | * |
| 1000 | * 3) x.x.x.x:y.y.y.y tap(4)'s address is x.x.x.x |
| 1001 | * pseudo netif's address is y.y.y.y |
| 1002 | * |
| 1003 | * 4) x.x.x.x:y.y.y.y/z tap(4)'s address is x.x.x.x |
| 1004 | * pseudo netif's address is y.y.y.y |
| 1005 | * tap(4) and pseudo netif's netmask len are z |
| 1006 | * |
| 1007 | * 5) bridgeX tap(4) will be added to bridgeX |
| 1008 | * |
| 1009 | * 6) bridgeX:y.y.y.y tap(4) will be added to bridgeX |
| 1010 | * pseudo netif's address is y.y.y.y |
| 1011 | * |
| 1012 | * 7) bridgeX:y.y.y.y/z tap(4) will be added to bridgeX |
| 1013 | * pseudo netif's address is y.y.y.y |
| 1014 | * pseudo netif's netmask len is z |
| 1015 | */ |
| 1016 | static |
| 1017 | int |
| 1018 | netif_init_tap(int tap_unit, in_addr_t *addr, in_addr_t *mask, int s) |
| 1019 | { |
| 1020 | in_addr_t tap_addr, netmask, netif_addr; |
| 1021 | int next_netif_addr; |
| 1022 | char *tok, *masklen_str, *ifbridge; |
| 1023 | |
| 1024 | *addr = 0; |
| 1025 | *mask = 0; |
| 1026 | |
| 1027 | tok = strtok(NULL, ":/"); |
| 1028 | if (tok == NULL) { |
| 1029 | /* |
| 1030 | * Nothing special, simply use tap(4) as backend |
| 1031 | */ |
| 1032 | return 0; |
| 1033 | } |
| 1034 | |
| 1035 | if (inet_pton(AF_INET, tok, &tap_addr) > 0) { |
| 1036 | /* |
| 1037 | * tap(4)'s address is supplied |
| 1038 | */ |
| 1039 | ifbridge = NULL; |
| 1040 | |
| 1041 | /* |
| 1042 | * If there is next token, then it may be pseudo |
| 1043 | * netif's address or netmask len for tap(4) |
| 1044 | */ |
| 1045 | next_netif_addr = 0; |
| 1046 | } else { |
| 1047 | /* |
| 1048 | * Not tap(4)'s address, assume it as a bridge(4) |
| 1049 | * iface name |
| 1050 | */ |
| 1051 | tap_addr = 0; |
| 1052 | ifbridge = tok; |
| 1053 | |
| 1054 | /* |
| 1055 | * If there is next token, then it must be pseudo |
| 1056 | * netif's address |
| 1057 | */ |
| 1058 | next_netif_addr = 1; |
| 1059 | } |
| 1060 | |
| 1061 | netmask = netif_addr = 0; |
| 1062 | |
| 1063 | tok = strtok(NULL, ":/"); |
| 1064 | if (tok == NULL) |
| 1065 | goto back; |
| 1066 | |
| 1067 | if (inet_pton(AF_INET, tok, &netif_addr) <= 0) { |
| 1068 | if (next_netif_addr) { |
| 1069 | warnx("Invalid pseudo netif address: %s", tok); |
| 1070 | return -1; |
| 1071 | } |
| 1072 | netif_addr = 0; |
| 1073 | |
| 1074 | /* |
| 1075 | * Current token is not address, then it must be netmask len |
| 1076 | */ |
| 1077 | masklen_str = tok; |
| 1078 | } else { |
| 1079 | /* |
| 1080 | * Current token is pseudo netif address, if there is next token |
| 1081 | * it must be netmask len |
| 1082 | */ |
| 1083 | masklen_str = strtok(NULL, "/"); |
| 1084 | } |
| 1085 | |
| 1086 | /* Calculate netmask */ |
| 1087 | if (masklen_str != NULL) { |
| 1088 | u_long masklen; |
| 1089 | |
| 1090 | masklen = strtoul(masklen_str, NULL, 10); |
| 1091 | if (masklen < 32 && masklen > 0) { |
| 1092 | netmask = htonl(~((1LL << (32 - masklen)) - 1) |
| 1093 | & 0xffffffff); |
| 1094 | } else { |
| 1095 | warnx("Invalid netmask len: %lu", masklen); |
| 1096 | return -1; |
| 1097 | } |
| 1098 | } |
| 1099 | |
| 1100 | /* Make sure there is no more token left */ |
| 1101 | if (strtok(NULL, ":/") != NULL) { |
| 1102 | warnx("Invalid argument to '-I'"); |
| 1103 | return -1; |
| 1104 | } |
| 1105 | |
| 1106 | back: |
| 1107 | if (tap_unit < 0) { |
| 1108 | /* Do nothing */ |
| 1109 | } else if (ifbridge == NULL) { |
| 1110 | /* Set tap(4) address/netmask */ |
| 1111 | if (netif_set_tapaddr(tap_unit, tap_addr, netmask, s) < 0) |
| 1112 | return -1; |
| 1113 | } else { |
| 1114 | /* Tie tap(4) to bridge(4) */ |
| 1115 | if (netif_add_tap2brg(tap_unit, ifbridge, s) < 0) |
| 1116 | return -1; |
| 1117 | } |
| 1118 | |
| 1119 | *addr = netif_addr; |
| 1120 | *mask = netmask; |
| 1121 | return 0; |
| 1122 | } |
| 1123 | |
| 1124 | /* |
| 1125 | * NetifInfo[] will be filled for pseudo netif initialization. |
| 1126 | * NetifNum will be bumped to reflect the number of valid entries |
| 1127 | * in NetifInfo[]. |
| 1128 | */ |
| 1129 | static |
| 1130 | void |
| 1131 | init_netif(char *netifExp[], int netifExpNum) |
| 1132 | { |
| 1133 | int i, s; |
| 1134 | |
| 1135 | if (netifExpNum == 0) |
| 1136 | return; |
| 1137 | |
| 1138 | s = socket(AF_INET, SOCK_DGRAM, 0); /* for ioctl(SIOC) */ |
| 1139 | if (s < 0) |
| 1140 | return; |
| 1141 | |
| 1142 | for (i = 0; i < netifExpNum; ++i) { |
| 1143 | struct vknetif_info *info; |
| 1144 | in_addr_t netif_addr, netif_mask; |
| 1145 | int tap_fd, tap_unit; |
| 1146 | char *netif; |
| 1147 | |
| 1148 | netif = strtok(netifExp[i], ":"); |
| 1149 | if (netif == NULL) { |
| 1150 | warnx("Invalid argument to '-I'"); |
| 1151 | continue; |
| 1152 | } |
| 1153 | |
| 1154 | /* |
| 1155 | * Open tap(4) device file and bring up the |
| 1156 | * corresponding interface |
| 1157 | */ |
| 1158 | tap_fd = netif_open_tap(netif, &tap_unit, s); |
| 1159 | if (tap_fd < 0) |
| 1160 | continue; |
| 1161 | |
| 1162 | /* |
| 1163 | * Initialize tap(4) and get address/netmask |
| 1164 | * for pseudo netif |
| 1165 | * |
| 1166 | * NB: Rest part of netifExp[i] is passed |
| 1167 | * to netif_init_tap() implicitly. |
| 1168 | */ |
| 1169 | if (netif_init_tap(tap_unit, &netif_addr, &netif_mask, s) < 0) { |
| 1170 | /* |
| 1171 | * NB: Closing tap(4) device file will bring |
| 1172 | * down the corresponding interface |
| 1173 | */ |
| 1174 | close(tap_fd); |
| 1175 | continue; |
| 1176 | } |
| 1177 | |
| 1178 | info = &NetifInfo[NetifNum]; |
| 1179 | info->tap_fd = tap_fd; |
| 1180 | info->tap_unit = tap_unit; |
| 1181 | info->netif_addr = netif_addr; |
| 1182 | info->netif_mask = netif_mask; |
| 1183 | |
| 1184 | NetifNum++; |
| 1185 | if (NetifNum >= VKNETIF_MAX) /* XXX will this happen? */ |
| 1186 | break; |
| 1187 | } |
| 1188 | close(s); |
| 1189 | } |
| 1190 | |
| 1191 | /* |
| 1192 | * Create the pid file and leave it open and locked while the vkernel is |
| 1193 | * running. This allows a script to use /usr/bin/lockf to probe whether |
| 1194 | * a vkernel is still running (so as not to accidently kill an unrelated |
| 1195 | * process from a stale pid file). |
| 1196 | */ |
| 1197 | static |
| 1198 | void |
| 1199 | writepid(void) |
| 1200 | { |
| 1201 | char buf[32]; |
| 1202 | int fd; |
| 1203 | |
| 1204 | if (pid_file != NULL) { |
| 1205 | snprintf(buf, sizeof(buf), "%ld\n", (long)getpid()); |
| 1206 | fd = open(pid_file, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0666); |
| 1207 | if (fd < 0) { |
| 1208 | if (errno == EWOULDBLOCK) { |
| 1209 | perror("Failed to lock pidfile, " |
| 1210 | "vkernel already running"); |
| 1211 | } else { |
| 1212 | perror("Failed to create pidfile"); |
| 1213 | } |
| 1214 | exit(EX_SOFTWARE); |
| 1215 | } |
| 1216 | ftruncate(fd, 0); |
| 1217 | write(fd, buf, strlen(buf)); |
| 1218 | /* leave the file open to maintain the lock */ |
| 1219 | } |
| 1220 | } |
| 1221 | |
| 1222 | static |
| 1223 | void |
| 1224 | cleanpid( void ) |
| 1225 | { |
| 1226 | if (pid_file != NULL) { |
| 1227 | if (unlink(pid_file) < 0) |
| 1228 | perror("Warning: couldn't remove pidfile"); |
| 1229 | } |
| 1230 | } |
| 1231 | |
| 1232 | static |
| 1233 | void |
| 1234 | usage_err(const char *ctl, ...) |
| 1235 | { |
| 1236 | va_list va; |
| 1237 | |
| 1238 | va_start(va, ctl); |
| 1239 | vfprintf(stderr, ctl, va); |
| 1240 | va_end(va); |
| 1241 | fprintf(stderr, "\n"); |
| 1242 | exit(EX_USAGE); |
| 1243 | } |
| 1244 | |
| 1245 | static |
| 1246 | void |
| 1247 | usage_help(_Bool help) |
| 1248 | { |
| 1249 | fprintf(stderr, "Usage: %s [-hsUv] [-c file] [-e name=value:name=value:...]\n" |
| 1250 | "\t[-i file] [-I interface[:address1[:address2][/netmask]]] [-l cpulock]\n" |
| 1251 | "\t[-m size] [-n numcpus] [-p file] [-r file]\n", save_av[0]); |
| 1252 | |
| 1253 | if (help) |
| 1254 | fprintf(stderr, "\nArguments:\n" |
| 1255 | "\t-c\tSpecify a readonly CD-ROM image file to be used by the kernel.\n" |
| 1256 | "\t-e\tSpecify an environment to be used by the kernel.\n" |
| 1257 | "\t-h\tThis list of options.\n" |
| 1258 | "\t-i\tSpecify a memory image file to be used by the virtual kernel.\n" |
| 1259 | "\t-I\tCreate a virtual network device.\n" |
| 1260 | "\t-l\tSpecify which, if any, real CPUs to lock virtual CPUs to.\n" |
| 1261 | "\t-m\tSpecify the amount of memory to be used by the kernel in bytes.\n" |
| 1262 | "\t-n\tSpecify the number of CPUs you wish to emulate.\n" |
| 1263 | "\t-p\tSpecify a file in which to store the process ID.\n" |
| 1264 | "\t-r\tSpecify a R/W disk image file to be used by the kernel.\n" |
| 1265 | "\t-s\tBoot into single-user mode.\n" |
| 1266 | "\t-U\tEnable writing to kernel memory and module loading.\n" |
| 1267 | "\t-v\tTurn on verbose booting.\n"); |
| 1268 | |
| 1269 | exit(EX_USAGE); |
| 1270 | } |
| 1271 | |
| 1272 | void |
| 1273 | cpu_reset(void) |
| 1274 | { |
| 1275 | kprintf("cpu reset, rebooting vkernel\n"); |
| 1276 | closefrom(3); |
| 1277 | cleanpid(); |
| 1278 | execv(save_av[0], save_av); |
| 1279 | } |
| 1280 | |
| 1281 | void |
| 1282 | cpu_halt(void) |
| 1283 | { |
| 1284 | kprintf("cpu halt, exiting vkernel\n"); |
| 1285 | cleanpid(); |
| 1286 | exit(EX_OK); |
| 1287 | } |
| 1288 | |
| 1289 | void |
| 1290 | setrealcpu(void) |
| 1291 | { |
| 1292 | switch(lwp_cpu_lock) { |
| 1293 | case LCL_PER_CPU: |
| 1294 | if (bootverbose) |
| 1295 | kprintf("Locking CPU%d to real cpu %d\n", |
| 1296 | mycpuid, next_cpu); |
| 1297 | usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu)); |
| 1298 | next_cpu++; |
| 1299 | if (next_cpu >= real_ncpus) |
| 1300 | next_cpu = 0; |
| 1301 | break; |
| 1302 | case LCL_SINGLE_CPU: |
| 1303 | if (bootverbose) |
| 1304 | kprintf("Locking CPU%d to real cpu %d\n", |
| 1305 | mycpuid, next_cpu); |
| 1306 | usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu)); |
| 1307 | break; |
| 1308 | default: |
| 1309 | /* do not map virtual cpus to real cpus */ |
| 1310 | break; |
| 1311 | } |
| 1312 | } |
| 1313 | |
| 1314 | /* |
| 1315 | * Allocate and free memory for module loading. The loaded module |
| 1316 | * has to be placed somewhere near the current kernel binary load |
| 1317 | * point or the relocations will not work. |
| 1318 | * |
| 1319 | * I'm not sure why this isn't working. |
| 1320 | */ |
| 1321 | int |
| 1322 | vkernel_module_memory_alloc(vm_offset_t *basep, size_t bytes) |
| 1323 | { |
| 1324 | kprintf("module loading for vkernel64's not currently supported\n"); |
| 1325 | *basep = 0; |
| 1326 | return ENOMEM; |
| 1327 | #if 0 |
| 1328 | #if 1 |
| 1329 | size_t xtra; |
| 1330 | xtra = (PAGE_SIZE - (vm_offset_t)sbrk(0)) & PAGE_MASK; |
| 1331 | *basep = (vm_offset_t)sbrk(xtra + bytes) + xtra; |
| 1332 | bzero((void *)*basep, bytes); |
| 1333 | #else |
| 1334 | *basep = (vm_offset_t)mmap((void *)0x000000000, bytes, |
| 1335 | PROT_READ|PROT_WRITE|PROT_EXEC, |
| 1336 | MAP_ANON|MAP_SHARED, -1, 0); |
| 1337 | if ((void *)*basep == MAP_FAILED) |
| 1338 | return ENOMEM; |
| 1339 | #endif |
| 1340 | kprintf("basep %p %p %zd\n", |
| 1341 | (void *)vkernel_module_memory_alloc, (void *)*basep, bytes); |
| 1342 | return 0; |
| 1343 | #endif |
| 1344 | } |
| 1345 | |
| 1346 | void |
| 1347 | vkernel_module_memory_free(vm_offset_t base, size_t bytes) |
| 1348 | { |
| 1349 | #if 0 |
| 1350 | #if 0 |
| 1351 | munmap((void *)base, bytes); |
| 1352 | #endif |
| 1353 | #endif |
| 1354 | } |