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 35 #include <sys/types.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/stat.h> 39 #include <sys/mman.h> 40 #include <sys/cons.h> 41 #include <sys/random.h> 42 #include <sys/vkernel.h> 43 #include <sys/tls.h> 44 #include <sys/reboot.h> 45 #include <sys/proc.h> 46 #include <sys/msgbuf.h> 47 #include <sys/vmspace.h> 48 #include <sys/socket.h> 49 #include <sys/sockio.h> 50 #include <sys/sysctl.h> 51 #include <sys/un.h> 52 #include <vm/vm_page.h> 53 #include <vm/vm_map.h> 54 #include <sys/mplock2.h> 55 #include <sys/wait.h> 56 #include <sys/vmm.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 #include <net/if_var.h> 72 73 #include <stdio.h> 74 #include <stdlib.h> 75 #include <stdarg.h> 76 #include <stdbool.h> 77 #include <unistd.h> 78 #include <fcntl.h> 79 #include <string.h> 80 #include <err.h> 81 #include <errno.h> 82 #include <assert.h> 83 #include <sysexits.h> 84 85 #define EX_VKERNEL_REBOOT 32 86 87 vm_phystable_t phys_avail[16]; 88 vm_paddr_t Maxmem; 89 vm_paddr_t Maxmem_bytes; 90 long physmem; 91 int MemImageFd = -1; 92 struct vkdisk_info DiskInfo[VKDISK_MAX]; 93 int DiskNum; 94 struct vknetif_info NetifInfo[VKNETIF_MAX]; 95 int NetifNum; 96 char *pid_file; 97 vm_offset_t KvaStart; 98 vm_offset_t KvaEnd; 99 vm_offset_t KvaSize; 100 vm_offset_t virtual_start; 101 vm_offset_t virtual_end; 102 vm_offset_t virtual2_start; 103 vm_offset_t virtual2_end; 104 vm_offset_t kernel_vm_end; 105 vm_offset_t crashdumpmap; 106 vm_offset_t clean_sva; 107 vm_offset_t clean_eva; 108 struct msgbuf *msgbufp; 109 caddr_t ptvmmap; 110 vpte_t *KernelPTD; 111 vpte_t *KernelPTA; /* Warning: Offset for direct VA translation */ 112 void *dmap_min_address; 113 void *vkernel_stack; 114 u_int cpu_feature; /* XXX */ 115 int tsc_present; 116 int tsc_invariant; 117 int tsc_mpsync; 118 int64_t tsc_frequency; 119 int optcpus; /* number of cpus - see mp_start() */ 120 int cpu_bits; 121 int lwp_cpu_lock; /* if/how to lock virtual CPUs to real CPUs */ 122 int real_ncpus; /* number of real CPUs */ 123 int next_cpu; /* next real CPU to lock a virtual CPU to */ 124 int vkernel_b_arg; /* no of logical CPU bits - only SMP */ 125 int vkernel_B_arg; /* no of core bits - only SMP */ 126 int vmm_enabled; /* VMM HW assisted enable */ 127 int use_precise_timer = 0; /* use a precise timer (more expensive) */ 128 struct privatespace *CPU_prvspace; 129 130 extern uint64_t KPML4phys; /* phys addr of kernel level 4 */ 131 132 static struct trapframe proc0_tf; 133 static void *proc0paddr; 134 135 static void init_sys_memory(char *imageFile); 136 static void init_kern_memory(void); 137 static void init_kern_memory_vmm(void); 138 static void init_globaldata(void); 139 static void init_vkernel(void); 140 static void init_disk(char **diskExp, int *diskFlags, int diskFileNum, enum vkdisk_type type); 141 static void init_netif(char *netifExp[], int netifFileNum); 142 static void writepid(void); 143 static void cleanpid(void); 144 static int unix_connect(const char *path); 145 static void usage_err(const char *ctl, ...); 146 static void usage_help(_Bool); 147 static void init_locks(void); 148 static void handle_term(int); 149 150 pid_t childpid; 151 152 static int save_ac; 153 static int prezeromem; 154 static char **save_av; 155 156 /* 157 * Kernel startup for virtual kernels - standard main() 158 */ 159 int 160 main(int ac, char **av) 161 { 162 char *memImageFile = NULL; 163 char *netifFile[VKNETIF_MAX]; 164 char *diskFile[VKDISK_MAX]; 165 char *cdFile[VKDISK_MAX]; 166 char *suffix; 167 char *endp; 168 char *tmp; 169 char *tok; 170 int diskFlags[VKDISK_MAX]; 171 int netifFileNum = 0; 172 int diskFileNum = 0; 173 int cdFileNum = 0; 174 int bootOnDisk = -1; /* set below to vcd (0) or vkd (1) */ 175 int c; 176 int i; 177 int j; 178 int n; 179 int isq; 180 int pos; 181 int eflag; 182 int dflag = 0; /* disable vmm */ 183 int real_vkernel_enable; 184 int supports_sse; 185 uint32_t mxcsr_mask; 186 size_t vsize; 187 size_t msize; 188 size_t kenv_size; 189 size_t kenv_size2; 190 int status; 191 struct sigaction sa; 192 193 /* 194 * Currently a bad hack but rtld-elf needs LD_SHAREDLIB_BASE to 195 * be set to force it to mmap() shared libraries into low memory, 196 * so our module loader can link against the related symbols. 197 */ 198 if (getenv("LD_SHAREDLIB_BASE") == NULL) { 199 setenv("LD_SHAREDLIB_BASE", "0x10000000", 1); 200 execv(av[0], av); 201 fprintf(stderr, "Must run %s with full path\n", av[0]); 202 exit(1); 203 } 204 205 while ((childpid = fork()) != 0) { 206 /* Ignore signals */ 207 bzero(&sa, sizeof(sa)); 208 sigemptyset(&sa.sa_mask); 209 sa.sa_handler = SIG_IGN; 210 sigaction(SIGINT, &sa, NULL); 211 sigaction(SIGQUIT, &sa, NULL); 212 sigaction(SIGHUP, &sa, NULL); 213 214 /* 215 * Forward SIGTERM to the child so that 216 * the shutdown process initiates correctly. 217 */ 218 sa.sa_handler = handle_term; 219 sigaction(SIGTERM, &sa, NULL); 220 221 /* 222 * Wait for child to terminate, exit if 223 * someone stole our child. 224 */ 225 while (waitpid(childpid, &status, 0) != childpid) { 226 if (errno == ECHILD) 227 exit(1); 228 } 229 if (WEXITSTATUS(status) != EX_VKERNEL_REBOOT) 230 return 0; 231 } 232 233 /* 234 * Starting for real 235 */ 236 save_ac = ac; 237 save_av = av; 238 eflag = 0; 239 pos = 0; 240 kenv_size = 0; 241 242 /* 243 * Process options 244 */ 245 kernel_mem_readonly = 1; 246 optcpus = 2; 247 cpu_bits = 1; 248 vkernel_b_arg = 0; 249 vkernel_B_arg = 0; 250 lwp_cpu_lock = LCL_NONE; 251 252 real_vkernel_enable = 0; 253 vsize = sizeof(real_vkernel_enable); 254 sysctlbyname("vm.vkernel_enable", &real_vkernel_enable, &vsize, NULL,0); 255 256 if (real_vkernel_enable == 0) { 257 errx(1, "vm.vkernel_enable is 0, must be set " 258 "to 1 to execute a vkernel!"); 259 } 260 261 real_ncpus = 1; 262 vsize = sizeof(real_ncpus); 263 sysctlbyname("hw.ncpu", &real_ncpus, &vsize, NULL, 0); 264 265 if (ac < 2) 266 usage_help(false); 267 268 while ((c = getopt(ac, av, "c:hsvztl:m:n:r:R:e:i:p:I:Ud")) != -1) { 269 switch(c) { 270 case 'd': 271 dflag = 1; 272 break; 273 case 'e': 274 /* 275 * name=value:name=value:name=value... 276 * name="value"... 277 * 278 * Allow values to be quoted but note that shells 279 * may remove the quotes, so using this feature 280 * to embed colons may require a backslash. 281 */ 282 n = strlen(optarg); 283 isq = 0; 284 285 if (eflag == 0) { 286 kenv_size = n + 2; 287 kern_envp = malloc(kenv_size); 288 if (kern_envp == NULL) 289 errx(1, "Couldn't allocate %zd bytes for kern_envp", kenv_size); 290 } else { 291 kenv_size2 = kenv_size + n + 1; 292 pos = kenv_size - 1; 293 if ((tmp = realloc(kern_envp, kenv_size2)) == NULL) 294 errx(1, "Couldn't reallocate %zd bytes for kern_envp", kenv_size2); 295 kern_envp = tmp; 296 kenv_size = kenv_size2; 297 } 298 299 for (i = 0, j = pos; i < n; ++i) { 300 if (optarg[i] == '"') 301 isq ^= 1; 302 else if (optarg[i] == '\'') 303 isq ^= 2; 304 else if (isq == 0 && optarg[i] == ':') 305 kern_envp[j++] = 0; 306 else 307 kern_envp[j++] = optarg[i]; 308 } 309 kern_envp[j++] = 0; 310 kern_envp[j++] = 0; 311 eflag++; 312 break; 313 case 's': 314 boothowto |= RB_SINGLE; 315 break; 316 case 't': 317 use_precise_timer = 1; 318 break; 319 case 'v': 320 bootverbose = 1; 321 break; 322 case 'i': 323 memImageFile = optarg; 324 break; 325 case 'I': 326 if (netifFileNum < VKNETIF_MAX) 327 netifFile[netifFileNum++] = strdup(optarg); 328 break; 329 case 'r': 330 case 'R': 331 if (bootOnDisk < 0) 332 bootOnDisk = 1; 333 if (diskFileNum + cdFileNum < VKDISK_MAX) { 334 diskFile[diskFileNum] = strdup(optarg); 335 diskFlags[diskFileNum] = (c == 'R'); 336 ++diskFileNum; 337 } 338 break; 339 case 'c': 340 if (bootOnDisk < 0) 341 bootOnDisk = 0; 342 if (diskFileNum + cdFileNum < VKDISK_MAX) 343 cdFile[cdFileNum++] = strdup(optarg); 344 break; 345 case 'm': 346 Maxmem_bytes = strtoull(optarg, &suffix, 0); 347 if (suffix) { 348 switch(*suffix) { 349 case 'g': 350 case 'G': 351 Maxmem_bytes <<= 30; 352 break; 353 case 'm': 354 case 'M': 355 Maxmem_bytes <<= 20; 356 break; 357 case 'k': 358 case 'K': 359 Maxmem_bytes <<= 10; 360 break; 361 default: 362 Maxmem_bytes = 0; 363 usage_err("Bad maxmem option"); 364 /* NOT REACHED */ 365 break; 366 } 367 } 368 break; 369 case 'l': 370 next_cpu = -1; 371 if (strncmp("map", optarg, 3) == 0) { 372 lwp_cpu_lock = LCL_PER_CPU; 373 if (optarg[3] == ',') { 374 next_cpu = strtol(optarg+4, &endp, 0); 375 if (*endp != '\0') 376 usage_err("Bad target CPU number at '%s'", endp); 377 } else { 378 next_cpu = 0; 379 } 380 if (next_cpu < 0 || next_cpu > real_ncpus - 1) 381 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1); 382 } else if (strncmp("any", optarg, 3) == 0) { 383 lwp_cpu_lock = LCL_NONE; 384 } else { 385 lwp_cpu_lock = LCL_SINGLE_CPU; 386 next_cpu = strtol(optarg, &endp, 0); 387 if (*endp != '\0') 388 usage_err("Bad target CPU number at '%s'", endp); 389 if (next_cpu < 0 || next_cpu > real_ncpus - 1) 390 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1); 391 } 392 break; 393 case 'n': 394 /* 395 * This value is set up by mp_start(), don't just 396 * set ncpus here. 397 */ 398 tok = strtok(optarg, ":"); 399 optcpus = strtol(tok, NULL, 0); 400 if (optcpus < 1 || optcpus > MAXCPU) 401 usage_err("Bad ncpus, valid range is 1-%d", MAXCPU); 402 cpu_bits = 1; 403 while ((1 << cpu_bits) < optcpus) 404 ++cpu_bits; 405 406 /* 407 * By default assume simple hyper-threading 408 */ 409 vkernel_b_arg = 1; 410 vkernel_B_arg = cpu_bits - vkernel_b_arg; 411 412 /* 413 * [:lbits[:cbits]] override # of cpu bits 414 * for logical and core extraction, supplying 415 * defaults for any omission. 416 */ 417 tok = strtok(NULL, ":"); 418 if (tok != NULL) { 419 vkernel_b_arg = strtol(tok, NULL, 0); 420 vkernel_B_arg = cpu_bits - vkernel_b_arg; 421 422 /* :cbits argument */ 423 tok = strtok(NULL, ":"); 424 if (tok != NULL) { 425 vkernel_B_arg = strtol(tok, NULL, 0); 426 } 427 } 428 break; 429 case 'p': 430 pid_file = optarg; 431 break; 432 case 'U': 433 kernel_mem_readonly = 0; 434 break; 435 case 'h': 436 usage_help(true); 437 break; 438 case 'z': 439 prezeromem = 1; 440 break; 441 default: 442 usage_help(false); 443 } 444 } 445 446 /* 447 * Check VMM presence 448 */ 449 vsize = sizeof(vmm_enabled); 450 sysctlbyname("hw.vmm.enable", &vmm_enabled, &vsize, NULL, 0); 451 vmm_enabled = (vmm_enabled && !dflag); 452 453 writepid(); 454 cpu_disable_intr(); 455 if (vmm_enabled) { 456 /* use a MAP_ANON directly */ 457 printf("VMM is available\n"); 458 init_kern_memory_vmm(); 459 } else { 460 printf("VMM is not available\n"); 461 init_sys_memory(memImageFile); 462 init_kern_memory(); 463 } 464 init_globaldata(); 465 init_vkernel(); 466 setrealcpu(); 467 init_kqueue(); 468 469 vmm_guest = VMM_GUEST_VKERNEL; 470 471 /* 472 * Check TSC 473 */ 474 vsize = sizeof(tsc_present); 475 sysctlbyname("hw.tsc_present", &tsc_present, &vsize, NULL, 0); 476 vsize = sizeof(tsc_invariant); 477 sysctlbyname("hw.tsc_invariant", &tsc_invariant, &vsize, NULL, 0); 478 vsize = sizeof(tsc_mpsync); 479 sysctlbyname("hw.tsc_mpsync", &tsc_mpsync, &vsize, NULL, 0); 480 vsize = sizeof(tsc_frequency); 481 sysctlbyname("hw.tsc_frequency", &tsc_frequency, &vsize, NULL, 0); 482 if (tsc_present) 483 cpu_feature |= CPUID_TSC; 484 485 /* 486 * Check SSE 487 */ 488 vsize = sizeof(supports_sse); 489 supports_sse = 0; 490 sysctlbyname("hw.instruction_sse", &supports_sse, &vsize, NULL, 0); 491 sysctlbyname("hw.mxcsr_mask", &mxcsr_mask, &msize, NULL, 0); 492 init_fpu(supports_sse); 493 if (supports_sse) 494 cpu_feature |= CPUID_SSE | CPUID_FXSR; 495 496 /* 497 * We boot from the first installed disk. 498 */ 499 if (bootOnDisk == 1) { 500 init_disk(diskFile, diskFlags, diskFileNum, VKD_DISK); 501 init_disk(cdFile, NULL, cdFileNum, VKD_CD); 502 } else { 503 init_disk(cdFile, NULL, cdFileNum, VKD_CD); 504 init_disk(diskFile, diskFlags, diskFileNum, VKD_DISK); 505 } 506 507 init_netif(netifFile, netifFileNum); 508 init_exceptions(); 509 mi_startup(); 510 /* NOT REACHED */ 511 exit(EX_SOFTWARE); 512 } 513 514 /* SIGTERM handler */ 515 static 516 void 517 handle_term(int sig) 518 { 519 kill(childpid, sig); 520 } 521 522 /* 523 * Initialize system memory. This is the virtual kernel's 'RAM'. 524 */ 525 static 526 void 527 init_sys_memory(char *imageFile) 528 { 529 struct stat st; 530 int i; 531 int fd; 532 533 /* 534 * Figure out the system memory image size. If an image file was 535 * specified and -m was not specified, use the image file's size. 536 */ 537 if (imageFile && stat(imageFile, &st) == 0 && Maxmem_bytes == 0) 538 Maxmem_bytes = (vm_paddr_t)st.st_size; 539 if ((imageFile == NULL || stat(imageFile, &st) < 0) && 540 Maxmem_bytes == 0) { 541 errx(1, "Cannot create new memory file %s unless " 542 "system memory size is specified with -m", 543 imageFile); 544 /* NOT REACHED */ 545 } 546 547 /* 548 * Maxmem must be known at this time 549 */ 550 if (Maxmem_bytes < 64 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) { 551 errx(1, "Bad maxmem specification: 64MB minimum, " 552 "multiples of %dMB only", 553 SEG_SIZE / 1024 / 1024); 554 /* NOT REACHED */ 555 } 556 557 /* 558 * Generate an image file name if necessary, then open/create the 559 * file exclusively locked. Do not allow multiple virtual kernels 560 * to use the same image file. 561 * 562 * Don't iterate through a million files if we do not have write 563 * access to the directory, stop if our open() failed on a 564 * non-existant file. Otherwise opens can fail for any number 565 */ 566 if (imageFile == NULL) { 567 for (i = 0; i < 1000000; ++i) { 568 asprintf(&imageFile, "/var/vkernel/memimg.%06d", i); 569 fd = open(imageFile, 570 O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644); 571 if (fd < 0 && stat(imageFile, &st) == 0) { 572 free(imageFile); 573 continue; 574 } 575 break; 576 } 577 } else { 578 fd = open(imageFile, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644); 579 } 580 fprintf(stderr, "Using memory file: %s\n", imageFile); 581 if (fd < 0 || fstat(fd, &st) < 0) { 582 err(1, "Unable to open/create %s", imageFile); 583 /* NOT REACHED */ 584 } 585 586 /* 587 * Truncate or extend the file as necessary. Clean out the contents 588 * of the file, we want it to be full of holes so we don't waste 589 * time reading in data from an old file that we no longer care 590 * about. 591 */ 592 ftruncate(fd, 0); 593 ftruncate(fd, Maxmem_bytes); 594 595 MemImageFd = fd; 596 Maxmem = Maxmem_bytes >> PAGE_SHIFT; 597 physmem = Maxmem; 598 } 599 600 /* 601 * Initialize kernel memory. This reserves kernel virtual memory by using 602 * MAP_VPAGETABLE 603 */ 604 605 static 606 void 607 init_kern_memory(void) 608 { 609 void *base; 610 int i; 611 void *firstfree; 612 613 /* 614 * Memory map our kernel virtual memory space. Note that the 615 * kernel image itself is not made part of this memory for the 616 * moment. 617 * 618 * The memory map must be segment-aligned so we can properly 619 * offset KernelPTD. 620 * 621 * If the system kernel has a different MAXDSIZ, it might not 622 * be possible to map kernel memory in its prefered location. 623 * Try a number of different locations. 624 */ 625 626 base = mmap((void*)KERNEL_KVA_START, KERNEL_KVA_SIZE, 627 PROT_READ|PROT_WRITE|PROT_EXEC, 628 MAP_FILE|MAP_SHARED|MAP_VPAGETABLE|MAP_FIXED|MAP_TRYFIXED, 629 MemImageFd, (off_t)KERNEL_KVA_START); 630 631 if (base == MAP_FAILED) { 632 err(1, "Unable to mmap() kernel virtual memory!"); 633 /* NOT REACHED */ 634 } 635 madvise(base, KERNEL_KVA_SIZE, MADV_NOSYNC); 636 KvaStart = (vm_offset_t)base; 637 KvaSize = KERNEL_KVA_SIZE; 638 KvaEnd = KvaStart + KvaSize; 639 640 /* cannot use kprintf yet */ 641 printf("KVM mapped at %p-%p\n", (void *)KvaStart, (void *)KvaEnd); 642 643 /* MAP_FILE? */ 644 dmap_min_address = mmap(0, DMAP_SIZE, PROT_READ|PROT_WRITE, 645 MAP_NOCORE|MAP_NOSYNC|MAP_SHARED, 646 MemImageFd, 0); 647 if (dmap_min_address == MAP_FAILED) { 648 err(1, "Unable to mmap() kernel DMAP region!"); 649 /* NOT REACHED */ 650 } 651 652 /* 653 * Prefault the memory. The vkernel is going to fault it all in 654 * anyway, and faults on the backing store itself are very expensive 655 * once we go SMP (contend a lot). So do it now. 656 */ 657 if (prezeromem) 658 bzero(dmap_min_address, Maxmem_bytes); 659 660 /* 661 * Bootstrap the kernel_pmap 662 */ 663 firstfree = NULL; 664 pmap_bootstrap((vm_paddr_t *)&firstfree, (int64_t)base); 665 666 mcontrol(base, KERNEL_KVA_SIZE, MADV_SETMAP, 667 0 | VPTE_RW | VPTE_V); 668 669 /* 670 * phys_avail[] represents unallocated physical memory. MI code 671 * will use phys_avail[] to create the vm_page array. 672 */ 673 phys_avail[0].phys_beg = (vm_paddr_t)firstfree; 674 phys_avail[0].phys_beg = (phys_avail[0].phys_beg + PAGE_MASK) & 675 ~(vm_paddr_t)PAGE_MASK; 676 phys_avail[0].phys_end = Maxmem_bytes; 677 678 #if JGV 679 /* 680 * (virtual_start, virtual_end) represent unallocated kernel virtual 681 * memory. MI code will create kernel_map using these parameters. 682 */ 683 virtual_start = KvaStart + (long)firstfree; 684 virtual_start = (virtual_start + PAGE_MASK) & ~(vm_offset_t)PAGE_MASK; 685 virtual_end = KvaStart + KERNEL_KVA_SIZE; 686 #endif 687 688 /* 689 * pmap_growkernel() will set the correct value. 690 */ 691 kernel_vm_end = 0; 692 693 /* 694 * Allocate space for process 0's UAREA. 695 */ 696 proc0paddr = (void *)virtual_start; 697 for (i = 0; i < UPAGES; ++i) { 698 pmap_kenter_quick(virtual_start, phys_avail[0].phys_beg); 699 virtual_start += PAGE_SIZE; 700 phys_avail[0].phys_beg += PAGE_SIZE; 701 } 702 703 /* 704 * crashdumpmap 705 */ 706 crashdumpmap = virtual_start; 707 virtual_start += MAXDUMPPGS * PAGE_SIZE; 708 709 /* 710 * msgbufp maps the system message buffer 711 */ 712 assert((MSGBUF_SIZE & PAGE_MASK) == 0); 713 msgbufp = (void *)virtual_start; 714 for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) { 715 pmap_kenter_quick(virtual_start, phys_avail[0].phys_beg); 716 virtual_start += PAGE_SIZE; 717 phys_avail[0].phys_beg += PAGE_SIZE; 718 } 719 msgbufinit(msgbufp, MSGBUF_SIZE); 720 721 /* 722 * used by kern_memio for /dev/mem access 723 */ 724 ptvmmap = (caddr_t)virtual_start; 725 virtual_start += PAGE_SIZE; 726 } 727 728 static 729 void 730 init_kern_memory_vmm(void) 731 { 732 int i; 733 void *firstfree; 734 struct vmm_guest_options options; 735 void *dmap_address; 736 737 KvaStart = (vm_offset_t)KERNEL_KVA_START; 738 KvaSize = KERNEL_KVA_SIZE; 739 KvaEnd = KvaStart + KvaSize; 740 741 Maxmem = Maxmem_bytes >> PAGE_SHIFT; 742 physmem = Maxmem; 743 744 if (Maxmem_bytes < 64 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) { 745 errx(1, "Bad maxmem specification: 64MB minimum, " 746 "multiples of %dMB only", 747 SEG_SIZE / 1024 / 1024); 748 /* NOT REACHED */ 749 } 750 751 /* Call the vmspace_create to allocate the internal 752 * vkernel structures. Won't do anything else (no new 753 * vmspace) 754 */ 755 if (vmspace_create(NULL, 0, NULL) < 0) 756 panic("vmspace_create() failed"); 757 758 759 /* 760 * MAP_ANON the region of the VKERNEL phyisical memory 761 * (known as GPA - Guest Physical Address 762 */ 763 dmap_address = mmap(NULL, Maxmem_bytes, 764 PROT_READ|PROT_WRITE|PROT_EXEC, 765 MAP_ANON|MAP_SHARED, -1, 0); 766 if (dmap_address == MAP_FAILED) { 767 err(1, "Unable to mmap() RAM region!"); 768 /* NOT REACHED */ 769 } 770 if (prezeromem) 771 bzero(dmap_address, Maxmem_bytes); 772 773 /* Alloc a new stack in the lowmem */ 774 vkernel_stack = mmap(NULL, KERNEL_STACK_SIZE, 775 PROT_READ|PROT_WRITE|PROT_EXEC, 776 MAP_ANON, -1, 0); 777 if (vkernel_stack == MAP_FAILED) { 778 err(1, "Unable to allocate stack\n"); 779 } 780 781 /* 782 * Bootstrap the kernel_pmap 783 */ 784 firstfree = dmap_address; 785 dmap_min_address = NULL; /* VIRT == PHYS in the first 512G */ 786 pmap_bootstrap((vm_paddr_t *)&firstfree, (uint64_t)KvaStart); 787 788 /* 789 * Enter VMM mode 790 */ 791 bzero(&options, sizeof(options)); 792 options.guest_cr3 = (register_t) KPML4phys; 793 options.new_stack = (uint64_t) vkernel_stack + KERNEL_STACK_SIZE; 794 options.master = 1; 795 if (vmm_guest_ctl(VMM_GUEST_RUN, &options)) { 796 err(1, "Unable to enter VMM mode."); 797 } 798 799 /* 800 * phys_avail[] represents unallocated physical memory. MI code 801 * will use phys_avail[] to create the vm_page array. 802 */ 803 phys_avail[0].phys_beg = (vm_paddr_t)firstfree; 804 phys_avail[0].phys_beg = (phys_avail[0].phys_beg + PAGE_MASK) & 805 ~(vm_paddr_t)PAGE_MASK; 806 phys_avail[0].phys_end = (vm_paddr_t)dmap_address + Maxmem_bytes; 807 808 /* 809 * pmap_growkernel() will set the correct value. 810 */ 811 kernel_vm_end = 0; 812 813 /* 814 * Allocate space for process 0's UAREA. 815 */ 816 proc0paddr = (void *)virtual_start; 817 for (i = 0; i < UPAGES; ++i) { 818 pmap_kenter_quick(virtual_start, phys_avail[0].phys_beg); 819 virtual_start += PAGE_SIZE; 820 phys_avail[0].phys_beg += PAGE_SIZE; 821 } 822 823 /* 824 * crashdumpmap 825 */ 826 crashdumpmap = virtual_start; 827 virtual_start += MAXDUMPPGS * PAGE_SIZE; 828 829 /* 830 * msgbufp maps the system message buffer 831 */ 832 assert((MSGBUF_SIZE & PAGE_MASK) == 0); 833 msgbufp = (void *)virtual_start; 834 for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) { 835 836 pmap_kenter_quick(virtual_start, phys_avail[0].phys_beg); 837 virtual_start += PAGE_SIZE; 838 phys_avail[0].phys_beg += PAGE_SIZE; 839 } 840 841 msgbufinit(msgbufp, MSGBUF_SIZE); 842 843 /* 844 * used by kern_memio for /dev/mem access 845 */ 846 ptvmmap = (caddr_t)virtual_start; 847 virtual_start += PAGE_SIZE; 848 849 printf("vmm: Hardware pagetable enabled for guest\n"); 850 } 851 852 853 /* 854 * Map the per-cpu globaldata for cpu #0. Allocate the space using 855 * virtual_start and phys_avail[0] 856 */ 857 static 858 void 859 init_globaldata(void) 860 { 861 int i; 862 vm_paddr_t pa; 863 vm_offset_t va; 864 865 /* 866 * Reserve enough KVA to cover possible cpus. This is a considerable 867 * amount of KVA since the privatespace structure includes two 868 * whole page table mappings. 869 */ 870 virtual_start = (virtual_start + SEG_MASK) & ~(vm_offset_t)SEG_MASK; 871 CPU_prvspace = (void *)virtual_start; 872 virtual_start += sizeof(struct privatespace) * SMP_MAXCPU; 873 874 /* 875 * Allocate enough physical memory to cover the mdglobaldata 876 * portion of the space and the idle stack and map the pages 877 * into KVA. For cpu #0 only. 878 */ 879 for (i = 0; i < sizeof(struct mdglobaldata); i += PAGE_SIZE) { 880 pa = phys_avail[0].phys_beg; 881 va = (vm_offset_t)&CPU_prvspace[0].mdglobaldata + i; 882 pmap_kenter_quick(va, pa); 883 phys_avail[0].phys_beg += PAGE_SIZE; 884 } 885 for (i = 0; i < sizeof(CPU_prvspace[0].idlestack); i += PAGE_SIZE) { 886 pa = phys_avail[0].phys_beg; 887 va = (vm_offset_t)&CPU_prvspace[0].idlestack + i; 888 pmap_kenter_quick(va, pa); 889 phys_avail[0].phys_beg += PAGE_SIZE; 890 } 891 892 /* 893 * Setup the %gs for cpu #0. The mycpu macro works after this 894 * point. Note that %fs is used by pthreads. 895 */ 896 tls_set_gs(&CPU_prvspace[0], sizeof(struct privatespace)); 897 } 898 899 900 /* 901 * Initialize pool tokens and other necessary locks 902 */ 903 static void 904 init_locks(void) 905 { 906 907 /* 908 * Get the initial mplock with a count of 1 for the BSP. 909 * This uses a LOGICAL cpu ID, ie BSP == 0. 910 */ 911 cpu_get_initial_mplock(); 912 913 /* our token pool needs to work early */ 914 lwkt_token_pool_init(); 915 916 } 917 918 919 /* 920 * Initialize very low level systems including thread0, proc0, etc. 921 */ 922 static 923 void 924 init_vkernel(void) 925 { 926 struct mdglobaldata *gd; 927 928 gd = &CPU_prvspace[0].mdglobaldata; 929 bzero(gd, sizeof(*gd)); 930 931 gd->mi.gd_curthread = &thread0; 932 thread0.td_gd = &gd->mi; 933 ncpus = 1; 934 ncpus2 = 1; /* rounded down power of 2 */ 935 ncpus_fit = 1; /* rounded up power of 2 */ 936 /* ncpus2_mask and ncpus_fit_mask are 0 */ 937 init_param1(); 938 gd->mi.gd_prvspace = &CPU_prvspace[0]; 939 mi_gdinit(&gd->mi, 0); 940 cpu_gdinit(gd, 0); 941 mi_proc0init(&gd->mi, proc0paddr); 942 lwp0.lwp_md.md_regs = &proc0_tf; 943 944 init_locks(); 945 cninit(); 946 rand_initialize(); 947 #if 0 /* #ifdef DDB */ 948 kdb_init(); 949 if (boothowto & RB_KDB) 950 Debugger("Boot flags requested debugger"); 951 #endif 952 identcpu(); 953 #if 0 954 initializecpu(); /* Initialize CPU registers */ 955 #endif 956 init_param2((phys_avail[0].phys_end - 957 phys_avail[0].phys_beg) / PAGE_SIZE); 958 959 #if 0 960 /* 961 * Map the message buffer 962 */ 963 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE) 964 pmap_kenter((vm_offset_t)msgbufp + off, avail_end + off); 965 msgbufinit(msgbufp, MSGBUF_SIZE); 966 #endif 967 #if 0 968 thread0.td_pcb_cr3 ... MMU 969 lwp0.lwp_md.md_regs = &proc0_tf; 970 #endif 971 } 972 973 /* 974 * Filesystem image paths for the virtual kernel are optional. 975 * If specified they each should point to a disk image, 976 * the first of which will become the root disk. 977 * 978 * The virtual kernel caches data from our 'disk' just like a normal kernel, 979 * so we do not really want the real kernel to cache the data too. Use 980 * O_DIRECT to remove the duplication. 981 */ 982 static 983 void 984 init_disk(char **diskExp, int *diskFlags, int diskFileNum, enum vkdisk_type type) 985 { 986 char *serno; 987 int i; 988 989 if (diskFileNum == 0) 990 return; 991 992 for (i=0; i < diskFileNum; i++){ 993 char *fname; 994 fname = diskExp[i]; 995 996 if (fname == NULL) { 997 warnx("Invalid argument to '-r'"); 998 continue; 999 } 1000 /* 1001 * Check for a serial number for the virtual disk 1002 * passed from the command line. 1003 */ 1004 serno = fname; 1005 strsep(&serno, ":"); 1006 1007 if (DiskNum < VKDISK_MAX) { 1008 struct stat st; 1009 struct vkdisk_info *info = NULL; 1010 int fd; 1011 size_t l = 0; 1012 1013 if (type == VKD_DISK) 1014 fd = open(fname, O_RDWR|O_DIRECT, 0644); 1015 else 1016 fd = open(fname, O_RDONLY|O_DIRECT, 0644); 1017 if (fd < 0 || fstat(fd, &st) < 0) { 1018 err(1, "Unable to open/create %s", fname); 1019 /* NOT REACHED */ 1020 } 1021 if (S_ISREG(st.st_mode) && (diskFlags[i] & 1) == 0) { 1022 if (flock(fd, LOCK_EX|LOCK_NB) < 0) { 1023 errx(1, "Disk image %s is already " 1024 "in use\n", fname); 1025 /* NOT REACHED */ 1026 } 1027 } 1028 1029 info = &DiskInfo[DiskNum]; 1030 l = strlen(fname); 1031 1032 info->unit = i; 1033 info->fd = fd; 1034 info->type = type; 1035 info->flags = diskFlags[i]; 1036 memcpy(info->fname, fname, l); 1037 info->serno = NULL; 1038 if (serno) { 1039 if ((info->serno = malloc(SERNOLEN)) != NULL) 1040 strlcpy(info->serno, serno, SERNOLEN); 1041 else 1042 warnx("Couldn't allocate memory for the operation"); 1043 } 1044 1045 if (DiskNum == 0) { 1046 if (type == VKD_CD) { 1047 rootdevnames[0] = "cd9660:vcd0"; 1048 } else if (type == VKD_DISK) { 1049 rootdevnames[0] = "ufs:vkd0s0a"; 1050 rootdevnames[1] = "ufs:vkd0s1a"; 1051 } 1052 } 1053 1054 DiskNum++; 1055 } else { 1056 warnx("vkd%d (%s) > VKDISK_MAX", DiskNum, fname); 1057 continue; 1058 } 1059 } 1060 } 1061 1062 static 1063 int 1064 netif_set_tapflags(int tap_unit, int f, int s) 1065 { 1066 struct ifreq ifr; 1067 int flags; 1068 1069 bzero(&ifr, sizeof(ifr)); 1070 1071 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit); 1072 if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) { 1073 warn("tap%d: ioctl(SIOCGIFFLAGS) failed", tap_unit); 1074 return -1; 1075 } 1076 1077 /* 1078 * Adjust if_flags 1079 * 1080 * If the flags are already set/cleared, then we return 1081 * immediately to avoid extra syscalls 1082 */ 1083 flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16); 1084 if (f < 0) { 1085 /* Turn off flags */ 1086 f = -f; 1087 if ((flags & f) == 0) 1088 return 0; 1089 flags &= ~f; 1090 } else { 1091 /* Turn on flags */ 1092 if (flags & f) 1093 return 0; 1094 flags |= f; 1095 } 1096 1097 /* 1098 * Fix up ifreq.ifr_name, since it may be trashed 1099 * in previous ioctl(SIOCGIFFLAGS) 1100 */ 1101 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit); 1102 1103 ifr.ifr_flags = flags & 0xffff; 1104 ifr.ifr_flagshigh = flags >> 16; 1105 if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) { 1106 warn("tap%d: ioctl(SIOCSIFFLAGS) failed", tap_unit); 1107 return -1; 1108 } 1109 return 0; 1110 } 1111 1112 static 1113 int 1114 netif_set_tapaddr(int tap_unit, in_addr_t addr, in_addr_t mask, int s) 1115 { 1116 struct ifaliasreq ifra; 1117 struct sockaddr_in *in; 1118 1119 bzero(&ifra, sizeof(ifra)); 1120 snprintf(ifra.ifra_name, sizeof(ifra.ifra_name), "tap%d", tap_unit); 1121 1122 /* Setup address */ 1123 in = (struct sockaddr_in *)&ifra.ifra_addr; 1124 in->sin_family = AF_INET; 1125 in->sin_len = sizeof(*in); 1126 in->sin_addr.s_addr = addr; 1127 1128 if (mask != 0) { 1129 /* Setup netmask */ 1130 in = (struct sockaddr_in *)&ifra.ifra_mask; 1131 in->sin_len = sizeof(*in); 1132 in->sin_addr.s_addr = mask; 1133 } 1134 1135 if (ioctl(s, SIOCAIFADDR, &ifra) < 0) { 1136 warn("tap%d: ioctl(SIOCAIFADDR) failed", tap_unit); 1137 return -1; 1138 } 1139 return 0; 1140 } 1141 1142 static 1143 int 1144 netif_add_tap2brg(int tap_unit, const char *ifbridge, int s) 1145 { 1146 struct ifbreq ifbr; 1147 struct ifdrv ifd; 1148 1149 bzero(&ifbr, sizeof(ifbr)); 1150 snprintf(ifbr.ifbr_ifsname, sizeof(ifbr.ifbr_ifsname), 1151 "tap%d", tap_unit); 1152 1153 bzero(&ifd, sizeof(ifd)); 1154 strlcpy(ifd.ifd_name, ifbridge, sizeof(ifd.ifd_name)); 1155 ifd.ifd_cmd = BRDGADD; 1156 ifd.ifd_len = sizeof(ifbr); 1157 ifd.ifd_data = &ifbr; 1158 1159 if (ioctl(s, SIOCSDRVSPEC, &ifd) < 0) { 1160 /* 1161 * 'errno == EEXIST' means that the tap(4) is already 1162 * a member of the bridge(4) 1163 */ 1164 if (errno != EEXIST) { 1165 warn("ioctl(%s, SIOCSDRVSPEC) failed", ifbridge); 1166 return -1; 1167 } 1168 } 1169 return 0; 1170 } 1171 1172 #define TAPDEV_OFLAGS (O_RDWR | O_NONBLOCK) 1173 1174 /* 1175 * Locate the first unused tap(4) device file if auto mode is requested, 1176 * or open the user supplied device file, and bring up the corresponding 1177 * tap(4) interface. 1178 * 1179 * NOTE: Only tap(4) device file is supported currently 1180 */ 1181 static 1182 int 1183 netif_open_tap(const char *netif, int *tap_unit, int s) 1184 { 1185 char tap_dev[MAXPATHLEN]; 1186 int tap_fd, failed; 1187 struct stat st; 1188 char *dname; 1189 1190 *tap_unit = -1; 1191 1192 if (strcmp(netif, "auto") == 0) { 1193 /* 1194 * Find first unused tap(4) device file 1195 */ 1196 tap_fd = open("/dev/tap", TAPDEV_OFLAGS); 1197 if (tap_fd < 0) { 1198 warnc(errno, "Unable to find a free tap(4)"); 1199 return -1; 1200 } 1201 } else { 1202 /* 1203 * User supplied tap(4) device file or unix socket. 1204 */ 1205 if (netif[0] == '/') /* Absolute path */ 1206 strlcpy(tap_dev, netif, sizeof(tap_dev)); 1207 else 1208 snprintf(tap_dev, sizeof(tap_dev), "/dev/%s", netif); 1209 1210 tap_fd = open(tap_dev, TAPDEV_OFLAGS); 1211 1212 /* 1213 * If we cannot open normally try to connect to it. 1214 */ 1215 if (tap_fd < 0) 1216 tap_fd = unix_connect(tap_dev); 1217 1218 if (tap_fd < 0) { 1219 warn("Unable to open %s", tap_dev); 1220 return -1; 1221 } 1222 } 1223 1224 /* 1225 * Check whether the device file is a tap(4) 1226 */ 1227 if (fstat(tap_fd, &st) < 0) { 1228 failed = 1; 1229 } else if (S_ISCHR(st.st_mode)) { 1230 dname = fdevname(tap_fd); 1231 if (dname) 1232 dname = strstr(dname, "tap"); 1233 if (dname) { 1234 /* 1235 * Bring up the corresponding tap(4) interface 1236 */ 1237 *tap_unit = strtol(dname + 3, NULL, 10); 1238 printf("TAP UNIT %d\n", *tap_unit); 1239 if (netif_set_tapflags(*tap_unit, IFF_UP, s) == 0) 1240 failed = 0; 1241 else 1242 failed = 1; 1243 } else { 1244 failed = 1; 1245 } 1246 } else if (S_ISSOCK(st.st_mode)) { 1247 /* 1248 * Special socket connection (typically to vknet). We 1249 * do not have to do anything. 1250 */ 1251 failed = 0; 1252 } else { 1253 failed = 1; 1254 } 1255 1256 if (failed) { 1257 warnx("%s is not a tap(4) device or socket", tap_dev); 1258 close(tap_fd); 1259 tap_fd = -1; 1260 *tap_unit = -1; 1261 } 1262 return tap_fd; 1263 } 1264 1265 static int 1266 unix_connect(const char *path) 1267 { 1268 struct sockaddr_un sunx; 1269 int len; 1270 int net_fd; 1271 int sndbuf = 262144; 1272 struct stat st; 1273 1274 snprintf(sunx.sun_path, sizeof(sunx.sun_path), "%s", path); 1275 len = offsetof(struct sockaddr_un, sun_path[strlen(sunx.sun_path)]); 1276 ++len; /* include nul */ 1277 sunx.sun_family = AF_UNIX; 1278 sunx.sun_len = len; 1279 1280 net_fd = socket(AF_UNIX, SOCK_SEQPACKET, 0); 1281 if (net_fd < 0) 1282 return(-1); 1283 if (connect(net_fd, (void *)&sunx, len) < 0) { 1284 close(net_fd); 1285 return(-1); 1286 } 1287 setsockopt(net_fd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(sndbuf)); 1288 if (fstat(net_fd, &st) == 0) 1289 printf("Network socket buffer: %d bytes\n", st.st_blksize); 1290 fcntl(net_fd, F_SETFL, O_NONBLOCK); 1291 return(net_fd); 1292 } 1293 1294 #undef TAPDEV_MAJOR 1295 #undef TAPDEV_MINOR 1296 #undef TAPDEV_OFLAGS 1297 1298 /* 1299 * Following syntax is supported, 1300 * 1) x.x.x.x tap(4)'s address is x.x.x.x 1301 * 1302 * 2) x.x.x.x/z tap(4)'s address is x.x.x.x 1303 * tap(4)'s netmask len is z 1304 * 1305 * 3) x.x.x.x:y.y.y.y tap(4)'s address is x.x.x.x 1306 * pseudo netif's address is y.y.y.y 1307 * 1308 * 4) x.x.x.x:y.y.y.y/z tap(4)'s address is x.x.x.x 1309 * pseudo netif's address is y.y.y.y 1310 * tap(4) and pseudo netif's netmask len are z 1311 * 1312 * 5) bridgeX tap(4) will be added to bridgeX 1313 * 1314 * 6) bridgeX:y.y.y.y tap(4) will be added to bridgeX 1315 * pseudo netif's address is y.y.y.y 1316 * 1317 * 7) bridgeX:y.y.y.y/z tap(4) will be added to bridgeX 1318 * pseudo netif's address is y.y.y.y 1319 * pseudo netif's netmask len is z 1320 */ 1321 static 1322 int 1323 netif_init_tap(int tap_unit, in_addr_t *addr, in_addr_t *mask, int s) 1324 { 1325 in_addr_t tap_addr, netmask, netif_addr; 1326 int next_netif_addr; 1327 char *tok, *masklen_str, *ifbridge; 1328 1329 *addr = 0; 1330 *mask = 0; 1331 1332 tok = strtok(NULL, ":/"); 1333 if (tok == NULL) { 1334 /* 1335 * Nothing special, simply use tap(4) as backend 1336 */ 1337 return 0; 1338 } 1339 1340 if (inet_pton(AF_INET, tok, &tap_addr) > 0) { 1341 /* 1342 * tap(4)'s address is supplied 1343 */ 1344 ifbridge = NULL; 1345 1346 /* 1347 * If there is next token, then it may be pseudo 1348 * netif's address or netmask len for tap(4) 1349 */ 1350 next_netif_addr = 0; 1351 } else { 1352 /* 1353 * Not tap(4)'s address, assume it as a bridge(4) 1354 * iface name 1355 */ 1356 tap_addr = 0; 1357 ifbridge = tok; 1358 1359 /* 1360 * If there is next token, then it must be pseudo 1361 * netif's address 1362 */ 1363 next_netif_addr = 1; 1364 } 1365 1366 netmask = netif_addr = 0; 1367 1368 tok = strtok(NULL, ":/"); 1369 if (tok == NULL) 1370 goto back; 1371 1372 if (inet_pton(AF_INET, tok, &netif_addr) <= 0) { 1373 if (next_netif_addr) { 1374 warnx("Invalid pseudo netif address: %s", tok); 1375 return -1; 1376 } 1377 netif_addr = 0; 1378 1379 /* 1380 * Current token is not address, then it must be netmask len 1381 */ 1382 masklen_str = tok; 1383 } else { 1384 /* 1385 * Current token is pseudo netif address, if there is next token 1386 * it must be netmask len 1387 */ 1388 masklen_str = strtok(NULL, "/"); 1389 } 1390 1391 /* Calculate netmask */ 1392 if (masklen_str != NULL) { 1393 u_long masklen; 1394 1395 masklen = strtoul(masklen_str, NULL, 10); 1396 if (masklen < 32 && masklen > 0) { 1397 netmask = htonl(~((1LL << (32 - masklen)) - 1) 1398 & 0xffffffff); 1399 } else { 1400 warnx("Invalid netmask len: %lu", masklen); 1401 return -1; 1402 } 1403 } 1404 1405 /* Make sure there is no more token left */ 1406 if (strtok(NULL, ":/") != NULL) { 1407 warnx("Invalid argument to '-I'"); 1408 return -1; 1409 } 1410 1411 back: 1412 if (tap_unit < 0) { 1413 /* Do nothing */ 1414 } else if (ifbridge == NULL) { 1415 /* Set tap(4) address/netmask */ 1416 if (netif_set_tapaddr(tap_unit, tap_addr, netmask, s) < 0) 1417 return -1; 1418 } else { 1419 /* Tie tap(4) to bridge(4) */ 1420 if (netif_add_tap2brg(tap_unit, ifbridge, s) < 0) 1421 return -1; 1422 } 1423 1424 *addr = netif_addr; 1425 *mask = netmask; 1426 return 0; 1427 } 1428 1429 /* 1430 * NetifInfo[] will be filled for pseudo netif initialization. 1431 * NetifNum will be bumped to reflect the number of valid entries 1432 * in NetifInfo[]. 1433 */ 1434 static 1435 void 1436 init_netif(char *netifExp[], int netifExpNum) 1437 { 1438 int i, s; 1439 char *tmp; 1440 1441 if (netifExpNum == 0) 1442 return; 1443 1444 s = socket(AF_INET, SOCK_DGRAM, 0); /* for ioctl(SIOC) */ 1445 if (s < 0) 1446 return; 1447 1448 for (i = 0; i < netifExpNum; ++i) { 1449 struct vknetif_info *info; 1450 in_addr_t netif_addr, netif_mask; 1451 int tap_fd, tap_unit; 1452 char *netif; 1453 1454 /* Extract MAC address if there is one */ 1455 tmp = netifExp[i]; 1456 strsep(&tmp, "="); 1457 1458 netif = strtok(netifExp[i], ":"); 1459 if (netif == NULL) { 1460 warnx("Invalid argument to '-I'"); 1461 continue; 1462 } 1463 1464 /* 1465 * Open tap(4) device file and bring up the 1466 * corresponding interface 1467 */ 1468 tap_fd = netif_open_tap(netif, &tap_unit, s); 1469 if (tap_fd < 0) 1470 continue; 1471 1472 /* 1473 * Initialize tap(4) and get address/netmask 1474 * for pseudo netif 1475 * 1476 * NB: Rest part of netifExp[i] is passed 1477 * to netif_init_tap() implicitly. 1478 */ 1479 if (netif_init_tap(tap_unit, &netif_addr, &netif_mask, s) < 0) { 1480 /* 1481 * NB: Closing tap(4) device file will bring 1482 * down the corresponding interface 1483 */ 1484 close(tap_fd); 1485 continue; 1486 } 1487 1488 info = &NetifInfo[NetifNum]; 1489 bzero(info, sizeof(*info)); 1490 info->tap_fd = tap_fd; 1491 info->tap_unit = tap_unit; 1492 info->netif_addr = netif_addr; 1493 info->netif_mask = netif_mask; 1494 /* 1495 * If tmp isn't NULL it means a MAC could have been 1496 * specified so attempt to convert it. 1497 * Setting enaddr to NULL will tell vke_attach() we 1498 * need a pseudo-random MAC address. 1499 */ 1500 if (tmp != NULL) { 1501 if ((info->enaddr = malloc(ETHER_ADDR_LEN)) == NULL) 1502 warnx("Couldn't allocate memory for the operation"); 1503 else { 1504 if ((kether_aton(tmp, info->enaddr)) == NULL) { 1505 free(info->enaddr); 1506 info->enaddr = NULL; 1507 } 1508 } 1509 } 1510 1511 NetifNum++; 1512 if (NetifNum >= VKNETIF_MAX) /* XXX will this happen? */ 1513 break; 1514 } 1515 close(s); 1516 } 1517 1518 /* 1519 * Create the pid file and leave it open and locked while the vkernel is 1520 * running. This allows a script to use /usr/bin/lockf to probe whether 1521 * a vkernel is still running (so as not to accidently kill an unrelated 1522 * process from a stale pid file). 1523 */ 1524 static 1525 void 1526 writepid(void) 1527 { 1528 char buf[32]; 1529 int fd; 1530 1531 if (pid_file != NULL) { 1532 snprintf(buf, sizeof(buf), "%ld\n", (long)getpid()); 1533 fd = open(pid_file, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0666); 1534 if (fd < 0) { 1535 if (errno == EWOULDBLOCK) { 1536 perror("Failed to lock pidfile, " 1537 "vkernel already running"); 1538 } else { 1539 perror("Failed to create pidfile"); 1540 } 1541 exit(EX_SOFTWARE); 1542 } 1543 ftruncate(fd, 0); 1544 write(fd, buf, strlen(buf)); 1545 /* leave the file open to maintain the lock */ 1546 } 1547 } 1548 1549 static 1550 void 1551 cleanpid( void ) 1552 { 1553 if (pid_file != NULL) { 1554 if (unlink(pid_file) < 0) 1555 perror("Warning: couldn't remove pidfile"); 1556 } 1557 } 1558 1559 static 1560 void 1561 usage_err(const char *ctl, ...) 1562 { 1563 va_list va; 1564 1565 va_start(va, ctl); 1566 vfprintf(stderr, ctl, va); 1567 va_end(va); 1568 fprintf(stderr, "\n"); 1569 exit(EX_USAGE); 1570 } 1571 1572 static 1573 void 1574 usage_help(_Bool help) 1575 { 1576 fprintf(stderr, "Usage: %s [-hsUvdt] [-c file] [-e name=value:name=value:...]\n" 1577 "\t[-i file] [-I interface[:address1[:address2][/netmask]]] [-l cpulock]\n" 1578 "\t[-m size] [-n numcpus[:lbits[:cbits]]]\n" 1579 "\t[-p file] [-r file]\n", save_av[0]); 1580 1581 if (help) 1582 fprintf(stderr, "\nArguments:\n" 1583 "\t-c\tSpecify a readonly CD-ROM image file to be used by the kernel.\n" 1584 "\t-e\tSpecify an environment to be used by the kernel.\n" 1585 "\t-h\tThis list of options.\n" 1586 "\t-i\tSpecify a memory image file to be used by the virtual kernel.\n" 1587 "\t-I\tCreate a virtual network device.\n" 1588 "\t-l\tSpecify which, if any, real CPUs to lock virtual CPUs to.\n" 1589 "\t-m\tSpecify the amount of memory to be used by the kernel in bytes.\n" 1590 "\t-n\tSpecify the number of CPUs and the topology you wish to emulate:\n" 1591 "\t\t\tnumcpus - number of cpus\n" 1592 "\t\t\tlbits - specify the number of bits within APICID(=CPUID)\n" 1593 "\t\t\t needed for representing the logical ID.\n" 1594 "\t\t\t Controls the number of threads/core:\n" 1595 "\t\t\t (0 bits - 1 thread, 1 bit - 2 threads).\n" 1596 "\t\t\tcbits - specify the number of bits within APICID(=CPUID)\n" 1597 "\t\t\t needed for representing the core ID.\n" 1598 "\t\t\t Controls the number of cores/package:\n" 1599 "\t\t\t (0 bits - 1 core, 1 bit - 2 cores).\n" 1600 "\t-p\tSpecify a file in which to store the process ID.\n" 1601 "\t-r\tSpecify a R/W disk image file, iterates vkd0..n\n" 1602 "\t-R\tSpecify a COW disk image file, iterates vkd0..n\n" 1603 "\t-s\tBoot into single-user mode.\n" 1604 "\t-t\tUse a precise host timer when calculating clock values.\n" 1605 "\t-U\tEnable writing to kernel memory and module loading.\n" 1606 "\t-v\tTurn on verbose booting.\n"); 1607 1608 exit(EX_USAGE); 1609 } 1610 1611 void 1612 cpu_smp_stopped(void) 1613 { 1614 } 1615 1616 void 1617 cpu_reset(void) 1618 { 1619 kprintf("cpu reset, rebooting vkernel\n"); 1620 closefrom(3); 1621 cleanpid(); 1622 exit(EX_VKERNEL_REBOOT); 1623 } 1624 1625 void 1626 cpu_halt(void) 1627 { 1628 kprintf("cpu halt, exiting vkernel\n"); 1629 cleanpid(); 1630 exit(EX_OK); 1631 } 1632 1633 void 1634 setrealcpu(void) 1635 { 1636 switch(lwp_cpu_lock) { 1637 case LCL_PER_CPU: 1638 if (bootverbose) 1639 kprintf("Locking CPU%d to real cpu %d\n", 1640 mycpuid, next_cpu); 1641 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu)); 1642 next_cpu++; 1643 if (next_cpu >= real_ncpus) 1644 next_cpu = 0; 1645 break; 1646 case LCL_SINGLE_CPU: 1647 if (bootverbose) 1648 kprintf("Locking CPU%d to real cpu %d\n", 1649 mycpuid, next_cpu); 1650 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu)); 1651 break; 1652 default: 1653 /* do not map virtual cpus to real cpus */ 1654 break; 1655 } 1656 } 1657 1658 /* 1659 * Allocate and free memory for module loading. The loaded module 1660 * has to be placed somewhere near the current kernel binary load 1661 * point or the relocations will not work. 1662 * 1663 * I'm not sure why this isn't working. 1664 */ 1665 int 1666 vkernel_module_memory_alloc(vm_offset_t *basep, size_t bytes) 1667 { 1668 #if 1 1669 size_t xtra; 1670 xtra = (PAGE_SIZE - (vm_offset_t)sbrk(0)) & PAGE_MASK; 1671 *basep = (vm_offset_t)sbrk(xtra + bytes) + xtra; 1672 bzero((void *)*basep, bytes); 1673 #else 1674 *basep = (vm_offset_t)mmap((void *)0x000000000, bytes, 1675 PROT_READ|PROT_WRITE|PROT_EXEC, 1676 MAP_ANON|MAP_SHARED, -1, 0); 1677 if ((void *)*basep == MAP_FAILED) 1678 return ENOMEM; 1679 #endif 1680 return 0; 1681 } 1682 1683 void 1684 vkernel_module_memory_free(vm_offset_t base, size_t bytes) 1685 { 1686 #if 0 1687 #if 0 1688 munmap((void *)base, bytes); 1689 #endif 1690 #endif 1691 } 1692