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 int optcpus; /* number of cpus - see mp_start() */ 119 int cpu_bits; 120 int lwp_cpu_lock; /* if/how to lock virtual CPUs to real CPUs */ 121 int real_ncpus; /* number of real CPUs */ 122 int next_cpu; /* next real CPU to lock a virtual CPU to */ 123 int vkernel_b_arg; /* no of logical CPU bits - only SMP */ 124 int vkernel_B_arg; /* no of core bits - only SMP */ 125 int vmm_enabled; /* VMM HW assisted enable */ 126 int use_precise_timer = 0; /* use a precise timer (more expensive) */ 127 struct privatespace *CPU_prvspace; 128 129 tsc_uclock_t tsc_frequency; 130 tsc_uclock_t tsc_oneus_approx; 131 132 extern uint64_t KPML4phys; /* phys addr of kernel level 4 */ 133 134 static struct trapframe proc0_tf; 135 static void *proc0paddr; 136 137 static void init_sys_memory(char *imageFile); 138 static void init_kern_memory(void); 139 static void init_kern_memory_vmm(void); 140 static void init_globaldata(void); 141 static void init_vkernel(void); 142 static void init_disk(char **diskExp, int *diskFlags, int diskFileNum, enum vkdisk_type type); 143 static void init_netif(char *netifExp[], int netifFileNum); 144 static void writepid(void); 145 static void cleanpid(void); 146 static int unix_connect(const char *path); 147 static void usage_err(const char *ctl, ...) __printflike(1, 2); 148 static void usage_help(_Bool); 149 static void init_locks(void); 150 static void handle_term(int); 151 152 pid_t childpid; 153 154 static int save_ac; 155 static int prezeromem; 156 static char **save_av; 157 158 /* 159 * Kernel startup for virtual kernels - standard main() 160 */ 161 int 162 main(int ac, char **av) 163 { 164 char *memImageFile = NULL; 165 char *netifFile[VKNETIF_MAX]; 166 char *diskFile[VKDISK_MAX]; 167 char *cdFile[VKDISK_MAX]; 168 char *suffix; 169 char *endp; 170 char *tmp; 171 char *tok; 172 int diskFlags[VKDISK_MAX]; 173 int netifFileNum = 0; 174 int diskFileNum = 0; 175 int cdFileNum = 0; 176 int bootOnDisk = -1; /* set below to vcd (0) or vkd (1) */ 177 int c; 178 int i; 179 int j; 180 int n; 181 int isq; 182 int pos; 183 int eflag; 184 int dflag = 0; /* disable vmm */ 185 int real_vkernel_enable; 186 int supports_sse; 187 uint32_t mxcsr_mask; 188 size_t vsize; 189 size_t msize; 190 size_t kenv_size; 191 size_t kenv_size2; 192 int status; 193 struct sigaction sa; 194 195 /* 196 * Currently a bad hack but rtld-elf needs LD_SHAREDLIB_BASE to 197 * be set to force it to mmap() shared libraries into low memory, 198 * so our module loader can link against the related symbols. 199 */ 200 if (getenv("LD_SHAREDLIB_BASE") == NULL) { 201 setenv("LD_SHAREDLIB_BASE", "0x10000000", 1); 202 execv(av[0], av); 203 fprintf(stderr, "Must run %s with full path\n", av[0]); 204 exit(1); 205 } 206 207 while ((childpid = fork()) != 0) { 208 /* Ignore signals */ 209 bzero(&sa, sizeof(sa)); 210 sigemptyset(&sa.sa_mask); 211 sa.sa_handler = SIG_IGN; 212 sigaction(SIGINT, &sa, NULL); 213 sigaction(SIGQUIT, &sa, NULL); 214 sigaction(SIGHUP, &sa, NULL); 215 216 /* 217 * Forward SIGTERM to the child so that 218 * the shutdown process initiates correctly. 219 */ 220 sa.sa_handler = handle_term; 221 sigaction(SIGTERM, &sa, NULL); 222 223 /* 224 * Wait for child to terminate, exit if 225 * someone stole our child. 226 */ 227 while (waitpid(childpid, &status, 0) != childpid) { 228 if (errno == ECHILD) 229 exit(1); 230 } 231 if (WEXITSTATUS(status) != EX_VKERNEL_REBOOT) 232 return 0; 233 } 234 235 /* 236 * Starting for real 237 */ 238 save_ac = ac; 239 save_av = av; 240 eflag = 0; 241 pos = 0; 242 kenv_size = 0; 243 244 /* 245 * Process options 246 */ 247 kernel_mem_readonly = 1; 248 optcpus = 2; 249 cpu_bits = 1; 250 vkernel_b_arg = 0; 251 vkernel_B_arg = 0; 252 lwp_cpu_lock = LCL_NONE; 253 254 real_vkernel_enable = 0; 255 vsize = sizeof(real_vkernel_enable); 256 sysctlbyname("vm.vkernel_enable", &real_vkernel_enable, &vsize, NULL,0); 257 258 if (real_vkernel_enable == 0) { 259 errx(1, "vm.vkernel_enable is 0, must be set " 260 "to 1 to execute a vkernel!"); 261 } 262 263 real_ncpus = 1; 264 vsize = sizeof(real_ncpus); 265 sysctlbyname("hw.ncpu", &real_ncpus, &vsize, NULL, 0); 266 267 if (ac < 2) 268 usage_help(false); 269 270 while ((c = getopt(ac, av, "c:hsvztTl:m:n:r:R:e:i:p:I:Ud")) != -1) { 271 switch(c) { 272 case 'd': 273 dflag = 1; 274 break; 275 case 'e': 276 /* 277 * name=value:name=value:name=value... 278 * name="value"... 279 * 280 * Allow values to be quoted but note that shells 281 * may remove the quotes, so using this feature 282 * to embed colons may require a backslash. 283 */ 284 n = strlen(optarg); 285 isq = 0; 286 287 if (eflag == 0) { 288 kenv_size = n + 2; 289 kern_envp = malloc(kenv_size); 290 if (kern_envp == NULL) 291 errx(1, "Couldn't allocate %zd bytes for kern_envp", kenv_size); 292 } else { 293 kenv_size2 = kenv_size + n + 1; 294 pos = kenv_size - 1; 295 if ((tmp = realloc(kern_envp, kenv_size2)) == NULL) 296 errx(1, "Couldn't reallocate %zd bytes for kern_envp", kenv_size2); 297 kern_envp = tmp; 298 kenv_size = kenv_size2; 299 } 300 301 for (i = 0, j = pos; i < n; ++i) { 302 if (optarg[i] == '"') 303 isq ^= 1; 304 else if (optarg[i] == '\'') 305 isq ^= 2; 306 else if (isq == 0 && optarg[i] == ':') 307 kern_envp[j++] = 0; 308 else 309 kern_envp[j++] = optarg[i]; 310 } 311 kern_envp[j++] = 0; 312 kern_envp[j++] = 0; 313 eflag++; 314 break; 315 case 's': 316 boothowto |= RB_SINGLE; 317 break; 318 case 't': 319 use_precise_timer = 1; 320 break; 321 case 'v': 322 bootverbose = 1; 323 break; 324 case 'i': 325 memImageFile = optarg; 326 break; 327 case 'I': 328 if (netifFileNum < VKNETIF_MAX) 329 netifFile[netifFileNum++] = strdup(optarg); 330 break; 331 case 'r': 332 case 'R': 333 if (bootOnDisk < 0) 334 bootOnDisk = 1; 335 if (diskFileNum + cdFileNum < VKDISK_MAX) { 336 diskFile[diskFileNum] = strdup(optarg); 337 diskFlags[diskFileNum] = (c == 'R'); 338 ++diskFileNum; 339 } 340 break; 341 case 'c': 342 if (bootOnDisk < 0) 343 bootOnDisk = 0; 344 if (diskFileNum + cdFileNum < VKDISK_MAX) 345 cdFile[cdFileNum++] = strdup(optarg); 346 break; 347 case 'm': 348 Maxmem_bytes = strtoull(optarg, &suffix, 0); 349 if (suffix) { 350 switch(*suffix) { 351 case 'g': 352 case 'G': 353 Maxmem_bytes <<= 30; 354 break; 355 case 'm': 356 case 'M': 357 Maxmem_bytes <<= 20; 358 break; 359 case 'k': 360 case 'K': 361 Maxmem_bytes <<= 10; 362 break; 363 default: 364 Maxmem_bytes = 0; 365 usage_err("Bad maxmem option"); 366 /* NOT REACHED */ 367 break; 368 } 369 } 370 break; 371 case 'l': 372 next_cpu = -1; 373 if (strncmp("map", optarg, 3) == 0) { 374 lwp_cpu_lock = LCL_PER_CPU; 375 if (optarg[3] == ',') { 376 next_cpu = strtol(optarg+4, &endp, 0); 377 if (*endp != '\0') 378 usage_err("Bad target CPU number at '%s'", endp); 379 } else { 380 next_cpu = 0; 381 } 382 if (next_cpu < 0 || next_cpu > real_ncpus - 1) 383 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1); 384 } else if (strncmp("any", optarg, 3) == 0) { 385 lwp_cpu_lock = LCL_NONE; 386 } else { 387 lwp_cpu_lock = LCL_SINGLE_CPU; 388 next_cpu = strtol(optarg, &endp, 0); 389 if (*endp != '\0') 390 usage_err("Bad target CPU number at '%s'", endp); 391 if (next_cpu < 0 || next_cpu > real_ncpus - 1) 392 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1); 393 } 394 break; 395 case 'n': 396 /* 397 * This value is set up by mp_start(), don't just 398 * set ncpus here. 399 */ 400 tok = strtok(optarg, ":"); 401 optcpus = strtol(tok, NULL, 0); 402 if (optcpus < 1 || optcpus > MAXCPU) 403 usage_err("Bad ncpus, valid range is 1-%d", MAXCPU); 404 cpu_bits = 1; 405 while ((1 << cpu_bits) < optcpus) 406 ++cpu_bits; 407 408 /* 409 * By default assume simple hyper-threading 410 */ 411 vkernel_b_arg = 1; 412 vkernel_B_arg = cpu_bits - vkernel_b_arg; 413 414 /* 415 * [:lbits[:cbits]] override # of cpu bits 416 * for logical and core extraction, supplying 417 * defaults for any omission. 418 */ 419 tok = strtok(NULL, ":"); 420 if (tok != NULL) { 421 vkernel_b_arg = strtol(tok, NULL, 0); 422 vkernel_B_arg = cpu_bits - vkernel_b_arg; 423 424 /* :cbits argument */ 425 tok = strtok(NULL, ":"); 426 if (tok != NULL) { 427 vkernel_B_arg = strtol(tok, NULL, 0); 428 } 429 } 430 break; 431 case 'p': 432 pid_file = optarg; 433 break; 434 case 'U': 435 kernel_mem_readonly = 0; 436 break; 437 case 'h': 438 usage_help(true); 439 break; 440 case 'z': 441 prezeromem = 1; 442 break; 443 default: 444 usage_help(false); 445 } 446 } 447 448 /* 449 * Check VMM presence 450 */ 451 vsize = sizeof(vmm_enabled); 452 sysctlbyname("hw.vmm.enable", &vmm_enabled, &vsize, NULL, 0); 453 vmm_enabled = (vmm_enabled && !dflag); 454 455 writepid(); 456 cpu_disable_intr(); 457 if (vmm_enabled) { 458 /* use a MAP_ANON directly */ 459 printf("VMM is available\n"); 460 init_kern_memory_vmm(); 461 } else { 462 printf("VMM is not available\n"); 463 init_sys_memory(memImageFile); 464 init_kern_memory(); 465 } 466 init_globaldata(); 467 init_vkernel(); 468 setrealcpu(); 469 init_kqueue(); 470 471 vmm_guest = VMM_GUEST_VKERNEL; 472 473 /* 474 * Check TSC 475 */ 476 vsize = sizeof(tsc_present); 477 sysctlbyname("hw.tsc_present", &tsc_present, &vsize, NULL, 0); 478 vsize = sizeof(tsc_invariant); 479 sysctlbyname("hw.tsc_invariant", &tsc_invariant, &vsize, NULL, 0); 480 vsize = sizeof(tsc_mpsync); 481 sysctlbyname("hw.tsc_mpsync", &tsc_mpsync, &vsize, NULL, 0); 482 vsize = sizeof(tsc_frequency); 483 sysctlbyname("hw.tsc_frequency", &tsc_frequency, &vsize, NULL, 0); 484 if (tsc_present) 485 cpu_feature |= CPUID_TSC; 486 tsc_oneus_approx = ((tsc_frequency|1) + 999999) / 1000000; 487 488 /* 489 * Check SSE 490 */ 491 vsize = sizeof(supports_sse); 492 supports_sse = 0; 493 sysctlbyname("hw.instruction_sse", &supports_sse, &vsize, NULL, 0); 494 sysctlbyname("hw.mxcsr_mask", &mxcsr_mask, &msize, NULL, 0); 495 init_fpu(supports_sse); 496 if (supports_sse) 497 cpu_feature |= CPUID_SSE | CPUID_FXSR; 498 499 /* 500 * We boot from the first installed disk. 501 */ 502 if (bootOnDisk == 1) { 503 init_disk(diskFile, diskFlags, diskFileNum, VKD_DISK); 504 init_disk(cdFile, NULL, cdFileNum, VKD_CD); 505 } else { 506 init_disk(cdFile, NULL, cdFileNum, VKD_CD); 507 init_disk(diskFile, diskFlags, diskFileNum, VKD_DISK); 508 } 509 510 init_netif(netifFile, netifFileNum); 511 init_exceptions(); 512 mi_startup(); 513 /* NOT REACHED */ 514 exit(EX_SOFTWARE); 515 } 516 517 /* SIGTERM handler */ 518 static 519 void 520 handle_term(int sig) 521 { 522 kill(childpid, sig); 523 } 524 525 /* 526 * Initialize system memory. This is the virtual kernel's 'RAM'. 527 */ 528 static 529 void 530 init_sys_memory(char *imageFile) 531 { 532 struct stat st; 533 int i; 534 int fd; 535 536 /* 537 * Figure out the system memory image size. If an image file was 538 * specified and -m was not specified, use the image file's size. 539 */ 540 if (imageFile && stat(imageFile, &st) == 0 && Maxmem_bytes == 0) 541 Maxmem_bytes = (vm_paddr_t)st.st_size; 542 if ((imageFile == NULL || stat(imageFile, &st) < 0) && 543 Maxmem_bytes == 0) { 544 errx(1, "Cannot create new memory file %s unless " 545 "system memory size is specified with -m", 546 imageFile); 547 /* NOT REACHED */ 548 } 549 550 /* 551 * Maxmem must be known at this time 552 */ 553 if (Maxmem_bytes < 64 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) { 554 errx(1, "Bad maxmem specification: 64MB minimum, " 555 "multiples of %dMB only", 556 SEG_SIZE / 1024 / 1024); 557 /* NOT REACHED */ 558 } 559 560 /* 561 * Generate an image file name if necessary, then open/create the 562 * file exclusively locked. Do not allow multiple virtual kernels 563 * to use the same image file. 564 * 565 * Don't iterate through a million files if we do not have write 566 * access to the directory, stop if our open() failed on a 567 * non-existant file. Otherwise opens can fail for any number 568 */ 569 if (imageFile == NULL) { 570 for (i = 0; i < 1000000; ++i) { 571 asprintf(&imageFile, "/var/vkernel/memimg.%06d", i); 572 fd = open(imageFile, 573 O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644); 574 if (fd < 0 && stat(imageFile, &st) == 0) { 575 free(imageFile); 576 continue; 577 } 578 break; 579 } 580 } else { 581 fd = open(imageFile, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644); 582 } 583 fprintf(stderr, "Using memory file: %s\n", imageFile); 584 if (fd < 0 || fstat(fd, &st) < 0) { 585 err(1, "Unable to open/create %s", imageFile); 586 /* NOT REACHED */ 587 } 588 589 /* 590 * Truncate or extend the file as necessary. Clean out the contents 591 * of the file, we want it to be full of holes so we don't waste 592 * time reading in data from an old file that we no longer care 593 * about. 594 */ 595 ftruncate(fd, 0); 596 ftruncate(fd, Maxmem_bytes); 597 598 MemImageFd = fd; 599 Maxmem = Maxmem_bytes >> PAGE_SHIFT; 600 physmem = Maxmem; 601 } 602 603 /* 604 * Initialize kernel memory. This reserves kernel virtual memory by using 605 * MAP_VPAGETABLE 606 */ 607 608 static 609 void 610 init_kern_memory(void) 611 { 612 void *base; 613 int i; 614 void *firstfree; 615 616 /* 617 * Memory map our kernel virtual memory space. Note that the 618 * kernel image itself is not made part of this memory for the 619 * moment. 620 * 621 * The memory map must be segment-aligned so we can properly 622 * offset KernelPTD. 623 * 624 * If the system kernel has a different MAXDSIZ, it might not 625 * be possible to map kernel memory in its prefered location. 626 * Try a number of different locations. 627 */ 628 629 base = mmap((void*)KERNEL_KVA_START, KERNEL_KVA_SIZE, 630 PROT_READ|PROT_WRITE|PROT_EXEC, 631 MAP_FILE|MAP_SHARED|MAP_VPAGETABLE|MAP_FIXED|MAP_TRYFIXED, 632 MemImageFd, (off_t)KERNEL_KVA_START); 633 634 if (base == MAP_FAILED) { 635 err(1, "Unable to mmap() kernel virtual memory!"); 636 /* NOT REACHED */ 637 } 638 madvise(base, KERNEL_KVA_SIZE, MADV_NOSYNC); 639 KvaStart = (vm_offset_t)base; 640 KvaSize = KERNEL_KVA_SIZE; 641 KvaEnd = KvaStart + KvaSize; 642 643 /* cannot use kprintf yet */ 644 printf("KVM mapped at %p-%p\n", (void *)KvaStart, (void *)KvaEnd); 645 646 /* MAP_FILE? */ 647 dmap_min_address = mmap(0, DMAP_SIZE, PROT_READ|PROT_WRITE, 648 MAP_NOCORE|MAP_NOSYNC|MAP_SHARED, 649 MemImageFd, 0); 650 if (dmap_min_address == MAP_FAILED) { 651 err(1, "Unable to mmap() kernel DMAP region!"); 652 /* NOT REACHED */ 653 } 654 655 /* 656 * Prefault the memory. The vkernel is going to fault it all in 657 * anyway, and faults on the backing store itself are very expensive 658 * once we go SMP (contend a lot). So do it now. 659 */ 660 if (prezeromem) 661 bzero(dmap_min_address, Maxmem_bytes); 662 663 /* 664 * Bootstrap the kernel_pmap 665 */ 666 firstfree = NULL; 667 pmap_bootstrap((vm_paddr_t *)&firstfree, (int64_t)base); 668 669 mcontrol(base, KERNEL_KVA_SIZE, MADV_SETMAP, 670 0 | VPTE_RW | VPTE_V); 671 672 /* 673 * phys_avail[] represents unallocated physical memory. MI code 674 * will use phys_avail[] to create the vm_page array. 675 */ 676 phys_avail[0].phys_beg = (vm_paddr_t)firstfree; 677 phys_avail[0].phys_beg = (phys_avail[0].phys_beg + PAGE_MASK) & 678 ~(vm_paddr_t)PAGE_MASK; 679 phys_avail[0].phys_end = Maxmem_bytes; 680 681 #if 0 /* JGV */ 682 /* 683 * (virtual_start, virtual_end) represent unallocated kernel virtual 684 * memory. MI code will create kernel_map using these parameters. 685 */ 686 virtual_start = KvaStart + (long)firstfree; 687 virtual_start = (virtual_start + PAGE_MASK) & ~(vm_offset_t)PAGE_MASK; 688 virtual_end = KvaStart + KERNEL_KVA_SIZE; 689 #endif 690 691 /* 692 * pmap_growkernel() will set the correct value. 693 */ 694 kernel_vm_end = 0; 695 696 /* 697 * Allocate space for process 0's UAREA. 698 */ 699 proc0paddr = (void *)virtual_start; 700 for (i = 0; i < UPAGES; ++i) { 701 pmap_kenter_quick(virtual_start, phys_avail[0].phys_beg); 702 virtual_start += PAGE_SIZE; 703 phys_avail[0].phys_beg += PAGE_SIZE; 704 } 705 706 /* 707 * crashdumpmap 708 */ 709 crashdumpmap = virtual_start; 710 virtual_start += MAXDUMPPGS * PAGE_SIZE; 711 712 /* 713 * msgbufp maps the system message buffer 714 */ 715 assert((MSGBUF_SIZE & PAGE_MASK) == 0); 716 msgbufp = (void *)virtual_start; 717 for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) { 718 pmap_kenter_quick(virtual_start, phys_avail[0].phys_beg); 719 virtual_start += PAGE_SIZE; 720 phys_avail[0].phys_beg += PAGE_SIZE; 721 } 722 msgbufinit(msgbufp, MSGBUF_SIZE); 723 724 /* 725 * used by kern_memio for /dev/mem access 726 */ 727 ptvmmap = (caddr_t)virtual_start; 728 virtual_start += PAGE_SIZE; 729 } 730 731 static 732 void 733 init_kern_memory_vmm(void) 734 { 735 int i; 736 void *firstfree; 737 struct vmm_guest_options options; 738 void *dmap_address; 739 740 KvaStart = (vm_offset_t)KERNEL_KVA_START; 741 KvaSize = KERNEL_KVA_SIZE; 742 KvaEnd = KvaStart + KvaSize; 743 744 Maxmem = Maxmem_bytes >> PAGE_SHIFT; 745 physmem = Maxmem; 746 747 if (Maxmem_bytes < 64 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) { 748 errx(1, "Bad maxmem specification: 64MB minimum, " 749 "multiples of %dMB only", 750 SEG_SIZE / 1024 / 1024); 751 /* NOT REACHED */ 752 } 753 754 /* Call the vmspace_create to allocate the internal 755 * vkernel structures. Won't do anything else (no new 756 * vmspace) 757 */ 758 if (vmspace_create(NULL, 0, NULL) < 0) 759 panic("vmspace_create() failed"); 760 761 762 /* 763 * MAP_ANON the region of the VKERNEL phyisical memory 764 * (known as GPA - Guest Physical Address 765 */ 766 dmap_address = mmap(NULL, Maxmem_bytes, 767 PROT_READ|PROT_WRITE|PROT_EXEC, 768 MAP_ANON|MAP_SHARED, -1, 0); 769 if (dmap_address == MAP_FAILED) { 770 err(1, "Unable to mmap() RAM region!"); 771 /* NOT REACHED */ 772 } 773 if (prezeromem) 774 bzero(dmap_address, Maxmem_bytes); 775 776 /* Alloc a new stack in the lowmem */ 777 vkernel_stack = mmap(NULL, KERNEL_STACK_SIZE, 778 PROT_READ|PROT_WRITE|PROT_EXEC, 779 MAP_ANON, -1, 0); 780 if (vkernel_stack == MAP_FAILED) { 781 err(1, "Unable to allocate stack\n"); 782 } 783 784 /* 785 * Bootstrap the kernel_pmap 786 */ 787 firstfree = dmap_address; 788 dmap_min_address = NULL; /* VIRT == PHYS in the first 512G */ 789 pmap_bootstrap((vm_paddr_t *)&firstfree, (uint64_t)KvaStart); 790 791 /* 792 * Enter VMM mode 793 */ 794 bzero(&options, sizeof(options)); 795 options.guest_cr3 = (register_t) KPML4phys; 796 options.new_stack = (uint64_t) vkernel_stack + KERNEL_STACK_SIZE; 797 options.master = 1; 798 if (vmm_guest_ctl(VMM_GUEST_RUN, &options)) { 799 err(1, "Unable to enter VMM mode."); 800 } 801 802 /* 803 * phys_avail[] represents unallocated physical memory. MI code 804 * will use phys_avail[] to create the vm_page array. 805 */ 806 phys_avail[0].phys_beg = (vm_paddr_t)firstfree; 807 phys_avail[0].phys_beg = (phys_avail[0].phys_beg + PAGE_MASK) & 808 ~(vm_paddr_t)PAGE_MASK; 809 phys_avail[0].phys_end = (vm_paddr_t)dmap_address + Maxmem_bytes; 810 811 /* 812 * pmap_growkernel() will set the correct value. 813 */ 814 kernel_vm_end = 0; 815 816 /* 817 * Allocate space for process 0's UAREA. 818 */ 819 proc0paddr = (void *)virtual_start; 820 for (i = 0; i < UPAGES; ++i) { 821 pmap_kenter_quick(virtual_start, phys_avail[0].phys_beg); 822 virtual_start += PAGE_SIZE; 823 phys_avail[0].phys_beg += PAGE_SIZE; 824 } 825 826 /* 827 * crashdumpmap 828 */ 829 crashdumpmap = virtual_start; 830 virtual_start += MAXDUMPPGS * PAGE_SIZE; 831 832 /* 833 * msgbufp maps the system message buffer 834 */ 835 assert((MSGBUF_SIZE & PAGE_MASK) == 0); 836 msgbufp = (void *)virtual_start; 837 for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) { 838 839 pmap_kenter_quick(virtual_start, phys_avail[0].phys_beg); 840 virtual_start += PAGE_SIZE; 841 phys_avail[0].phys_beg += PAGE_SIZE; 842 } 843 844 msgbufinit(msgbufp, MSGBUF_SIZE); 845 846 /* 847 * used by kern_memio for /dev/mem access 848 */ 849 ptvmmap = (caddr_t)virtual_start; 850 virtual_start += PAGE_SIZE; 851 852 printf("vmm: Hardware pagetable enabled for guest\n"); 853 } 854 855 856 /* 857 * Map the per-cpu globaldata for cpu #0. Allocate the space using 858 * virtual_start and phys_avail[0] 859 */ 860 static 861 void 862 init_globaldata(void) 863 { 864 int i; 865 vm_paddr_t pa; 866 vm_offset_t va; 867 868 /* 869 * Reserve enough KVA to cover possible cpus. This is a considerable 870 * amount of KVA since the privatespace structure includes two 871 * whole page table mappings. 872 */ 873 virtual_start = (virtual_start + SEG_MASK) & ~(vm_offset_t)SEG_MASK; 874 CPU_prvspace = (void *)virtual_start; 875 virtual_start += sizeof(struct privatespace) * SMP_MAXCPU; 876 877 /* 878 * Allocate enough physical memory to cover the mdglobaldata 879 * portion of the space and the idle stack and map the pages 880 * into KVA. For cpu #0 only. 881 */ 882 for (i = 0; i < sizeof(struct mdglobaldata); i += PAGE_SIZE) { 883 pa = phys_avail[0].phys_beg; 884 va = (vm_offset_t)&CPU_prvspace[0].mdglobaldata + i; 885 pmap_kenter_quick(va, pa); 886 phys_avail[0].phys_beg += PAGE_SIZE; 887 } 888 for (i = 0; i < sizeof(CPU_prvspace[0].idlestack); i += PAGE_SIZE) { 889 pa = phys_avail[0].phys_beg; 890 va = (vm_offset_t)&CPU_prvspace[0].idlestack + i; 891 pmap_kenter_quick(va, pa); 892 phys_avail[0].phys_beg += PAGE_SIZE; 893 } 894 895 /* 896 * Setup the %gs for cpu #0. The mycpu macro works after this 897 * point. Note that %fs is used by pthreads. 898 */ 899 tls_set_gs(&CPU_prvspace[0], sizeof(struct privatespace)); 900 } 901 902 903 /* 904 * Initialize pool tokens and other necessary locks 905 */ 906 static void 907 init_locks(void) 908 { 909 910 /* 911 * Get the initial mplock with a count of 1 for the BSP. 912 * This uses a LOGICAL cpu ID, ie BSP == 0. 913 */ 914 cpu_get_initial_mplock(); 915 916 /* our token pool needs to work early */ 917 lwkt_token_pool_init(); 918 919 } 920 921 922 /* 923 * Initialize very low level systems including thread0, proc0, etc. 924 */ 925 static 926 void 927 init_vkernel(void) 928 { 929 struct mdglobaldata *gd; 930 931 gd = &CPU_prvspace[0].mdglobaldata; 932 bzero(gd, sizeof(*gd)); 933 934 gd->mi.gd_curthread = &thread0; 935 thread0.td_gd = &gd->mi; 936 ncpus = 1; 937 ncpus_fit = 1; /* rounded up power of 2 */ 938 /* ncpus_fit_mask are 0 */ 939 init_param1(); 940 gd->mi.gd_prvspace = &CPU_prvspace[0]; 941 mi_gdinit(&gd->mi, 0); 942 cpu_gdinit(gd, 0); 943 mi_proc0init(&gd->mi, proc0paddr); 944 lwp0.lwp_md.md_regs = &proc0_tf; 945 946 init_locks(); 947 cninit(); 948 rand_initialize(); 949 #if 0 /* #ifdef DDB */ 950 kdb_init(); 951 if (boothowto & RB_KDB) 952 Debugger("Boot flags requested debugger"); 953 #endif 954 identcpu(); 955 #if 0 956 initializecpu(); /* Initialize CPU registers */ 957 #endif 958 init_param2((phys_avail[0].phys_end - 959 phys_avail[0].phys_beg) / PAGE_SIZE); 960 961 #if 0 962 /* 963 * Map the message buffer 964 */ 965 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE) 966 pmap_kenter((vm_offset_t)msgbufp + off, avail_end + off); 967 msgbufinit(msgbufp, MSGBUF_SIZE); 968 #endif 969 #if 0 970 thread0.td_pcb_cr3 ... MMU 971 lwp0.lwp_md.md_regs = &proc0_tf; 972 #endif 973 } 974 975 /* 976 * Filesystem image paths for the virtual kernel are optional. 977 * If specified they each should point to a disk image, 978 * the first of which will become the root disk. 979 * 980 * The virtual kernel caches data from our 'disk' just like a normal kernel, 981 * so we do not really want the real kernel to cache the data too. Use 982 * O_DIRECT to remove the duplication. 983 */ 984 static 985 void 986 init_disk(char **diskExp, int *diskFlags, int diskFileNum, enum vkdisk_type type) 987 { 988 char *serno; 989 int i; 990 991 if (diskFileNum == 0) 992 return; 993 994 for (i=0; i < diskFileNum; i++){ 995 char *fname; 996 fname = diskExp[i]; 997 998 if (fname == NULL) { 999 warnx("Invalid argument to '-r'"); 1000 continue; 1001 } 1002 /* 1003 * Check for a serial number for the virtual disk 1004 * passed from the command line. 1005 */ 1006 serno = fname; 1007 strsep(&serno, ":"); 1008 1009 if (DiskNum < VKDISK_MAX) { 1010 struct stat st; 1011 struct vkdisk_info *info = NULL; 1012 int fd; 1013 size_t l = 0; 1014 1015 if (type == VKD_DISK) 1016 fd = open(fname, O_RDWR|O_DIRECT, 0644); 1017 else 1018 fd = open(fname, O_RDONLY|O_DIRECT, 0644); 1019 if (fd < 0 || fstat(fd, &st) < 0) { 1020 err(1, "Unable to open/create %s", fname); 1021 /* NOT REACHED */ 1022 } 1023 if (S_ISREG(st.st_mode) && (diskFlags[i] & 1) == 0) { 1024 if (flock(fd, LOCK_EX|LOCK_NB) < 0) { 1025 errx(1, "Disk image %s is already " 1026 "in use\n", fname); 1027 /* NOT REACHED */ 1028 } 1029 } 1030 1031 info = &DiskInfo[DiskNum]; 1032 l = strlen(fname); 1033 1034 info->unit = i; 1035 info->fd = fd; 1036 info->type = type; 1037 info->flags = diskFlags[i]; 1038 memcpy(info->fname, fname, l); 1039 info->serno = NULL; 1040 if (serno) { 1041 if ((info->serno = malloc(SERNOLEN)) != NULL) 1042 strlcpy(info->serno, serno, SERNOLEN); 1043 else 1044 warnx("Couldn't allocate memory for the operation"); 1045 } 1046 1047 if (DiskNum == 0) { 1048 if (type == VKD_CD) { 1049 rootdevnames[0] = "cd9660:vcd0"; 1050 } else if (type == VKD_DISK) { 1051 rootdevnames[0] = "ufs:vkd0s0a"; 1052 rootdevnames[1] = "ufs:vkd0s1a"; 1053 } 1054 } 1055 1056 DiskNum++; 1057 } else { 1058 warnx("vkd%d (%s) > VKDISK_MAX", DiskNum, fname); 1059 continue; 1060 } 1061 } 1062 } 1063 1064 static 1065 int 1066 netif_set_tapflags(int tap_unit, int f, int s) 1067 { 1068 struct ifreq ifr; 1069 int flags; 1070 1071 bzero(&ifr, sizeof(ifr)); 1072 1073 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit); 1074 if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) { 1075 warn("tap%d: ioctl(SIOCGIFFLAGS) failed", tap_unit); 1076 return -1; 1077 } 1078 1079 /* 1080 * Adjust if_flags 1081 * 1082 * If the flags are already set/cleared, then we return 1083 * immediately to avoid extra syscalls 1084 */ 1085 flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16); 1086 if (f < 0) { 1087 /* Turn off flags */ 1088 f = -f; 1089 if ((flags & f) == 0) 1090 return 0; 1091 flags &= ~f; 1092 } else { 1093 /* Turn on flags */ 1094 if (flags & f) 1095 return 0; 1096 flags |= f; 1097 } 1098 1099 /* 1100 * Fix up ifreq.ifr_name, since it may be trashed 1101 * in previous ioctl(SIOCGIFFLAGS) 1102 */ 1103 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit); 1104 1105 ifr.ifr_flags = flags & 0xffff; 1106 ifr.ifr_flagshigh = flags >> 16; 1107 if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) { 1108 warn("tap%d: ioctl(SIOCSIFFLAGS) failed", tap_unit); 1109 return -1; 1110 } 1111 return 0; 1112 } 1113 1114 static 1115 int 1116 netif_set_tapaddr(int tap_unit, in_addr_t addr, in_addr_t mask, int s) 1117 { 1118 struct ifaliasreq ifra; 1119 struct sockaddr_in *in; 1120 1121 bzero(&ifra, sizeof(ifra)); 1122 snprintf(ifra.ifra_name, sizeof(ifra.ifra_name), "tap%d", tap_unit); 1123 1124 /* Setup address */ 1125 in = (struct sockaddr_in *)&ifra.ifra_addr; 1126 in->sin_family = AF_INET; 1127 in->sin_len = sizeof(*in); 1128 in->sin_addr.s_addr = addr; 1129 1130 if (mask != 0) { 1131 /* Setup netmask */ 1132 in = (struct sockaddr_in *)&ifra.ifra_mask; 1133 in->sin_len = sizeof(*in); 1134 in->sin_addr.s_addr = mask; 1135 } 1136 1137 if (ioctl(s, SIOCAIFADDR, &ifra) < 0) { 1138 warn("tap%d: ioctl(SIOCAIFADDR) failed", tap_unit); 1139 return -1; 1140 } 1141 return 0; 1142 } 1143 1144 static 1145 int 1146 netif_add_tap2brg(int tap_unit, const char *ifbridge, int s) 1147 { 1148 struct ifbreq ifbr; 1149 struct ifdrv ifd; 1150 1151 bzero(&ifbr, sizeof(ifbr)); 1152 snprintf(ifbr.ifbr_ifsname, sizeof(ifbr.ifbr_ifsname), 1153 "tap%d", tap_unit); 1154 1155 bzero(&ifd, sizeof(ifd)); 1156 strlcpy(ifd.ifd_name, ifbridge, sizeof(ifd.ifd_name)); 1157 ifd.ifd_cmd = BRDGADD; 1158 ifd.ifd_len = sizeof(ifbr); 1159 ifd.ifd_data = &ifbr; 1160 1161 if (ioctl(s, SIOCSDRVSPEC, &ifd) < 0) { 1162 /* 1163 * 'errno == EEXIST' means that the tap(4) is already 1164 * a member of the bridge(4) 1165 */ 1166 if (errno != EEXIST) { 1167 warn("ioctl(%s, SIOCSDRVSPEC) failed", ifbridge); 1168 return -1; 1169 } 1170 } 1171 return 0; 1172 } 1173 1174 #define TAPDEV_OFLAGS (O_RDWR | O_NONBLOCK) 1175 1176 /* 1177 * Locate the first unused tap(4) device file if auto mode is requested, 1178 * or open the user supplied device file, and bring up the corresponding 1179 * tap(4) interface. 1180 * 1181 * NOTE: Only tap(4) device file is supported currently 1182 */ 1183 static 1184 int 1185 netif_open_tap(const char *netif, int *tap_unit, int s) 1186 { 1187 char tap_dev[MAXPATHLEN]; 1188 int tap_fd, failed; 1189 struct stat st; 1190 char *dname; 1191 1192 *tap_unit = -1; 1193 1194 if (strcmp(netif, "auto") == 0) { 1195 /* 1196 * Find first unused tap(4) device file 1197 */ 1198 tap_fd = open("/dev/tap", TAPDEV_OFLAGS); 1199 if (tap_fd < 0) { 1200 warnc(errno, "Unable to find a free tap(4)"); 1201 return -1; 1202 } 1203 } else { 1204 /* 1205 * User supplied tap(4) device file or unix socket. 1206 */ 1207 if (netif[0] == '/') /* Absolute path */ 1208 strlcpy(tap_dev, netif, sizeof(tap_dev)); 1209 else 1210 snprintf(tap_dev, sizeof(tap_dev), "/dev/%s", netif); 1211 1212 tap_fd = open(tap_dev, TAPDEV_OFLAGS); 1213 1214 /* 1215 * If we cannot open normally try to connect to it. 1216 */ 1217 if (tap_fd < 0) 1218 tap_fd = unix_connect(tap_dev); 1219 1220 if (tap_fd < 0) { 1221 warn("Unable to open %s", tap_dev); 1222 return -1; 1223 } 1224 } 1225 1226 /* 1227 * Check whether the device file is a tap(4) 1228 */ 1229 if (fstat(tap_fd, &st) < 0) { 1230 failed = 1; 1231 } else if (S_ISCHR(st.st_mode)) { 1232 dname = fdevname(tap_fd); 1233 if (dname) 1234 dname = strstr(dname, "tap"); 1235 if (dname) { 1236 /* 1237 * Bring up the corresponding tap(4) interface 1238 */ 1239 *tap_unit = strtol(dname + 3, NULL, 10); 1240 printf("TAP UNIT %d\n", *tap_unit); 1241 if (netif_set_tapflags(*tap_unit, IFF_UP, s) == 0) 1242 failed = 0; 1243 else 1244 failed = 1; 1245 } else { 1246 failed = 1; 1247 } 1248 } else if (S_ISSOCK(st.st_mode)) { 1249 /* 1250 * Special socket connection (typically to vknet). We 1251 * do not have to do anything. 1252 */ 1253 failed = 0; 1254 } else { 1255 failed = 1; 1256 } 1257 1258 if (failed) { 1259 warnx("%s is not a tap(4) device or socket", tap_dev); 1260 close(tap_fd); 1261 tap_fd = -1; 1262 *tap_unit = -1; 1263 } 1264 return tap_fd; 1265 } 1266 1267 static int 1268 unix_connect(const char *path) 1269 { 1270 struct sockaddr_un sunx; 1271 int len; 1272 int net_fd; 1273 int sndbuf = 262144; 1274 struct stat st; 1275 1276 snprintf(sunx.sun_path, sizeof(sunx.sun_path), "%s", path); 1277 len = offsetof(struct sockaddr_un, sun_path[strlen(sunx.sun_path)]); 1278 ++len; /* include nul */ 1279 sunx.sun_family = AF_UNIX; 1280 sunx.sun_len = len; 1281 1282 net_fd = socket(AF_UNIX, SOCK_SEQPACKET, 0); 1283 if (net_fd < 0) 1284 return(-1); 1285 if (connect(net_fd, (void *)&sunx, len) < 0) { 1286 close(net_fd); 1287 return(-1); 1288 } 1289 setsockopt(net_fd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(sndbuf)); 1290 if (fstat(net_fd, &st) == 0) 1291 printf("Network socket buffer: %ld bytes\n", st.st_blksize); 1292 fcntl(net_fd, F_SETFL, O_NONBLOCK); 1293 return(net_fd); 1294 } 1295 1296 #undef TAPDEV_MAJOR 1297 #undef TAPDEV_MINOR 1298 #undef TAPDEV_OFLAGS 1299 1300 /* 1301 * Following syntax is supported, 1302 * 1) x.x.x.x tap(4)'s address is x.x.x.x 1303 * 1304 * 2) x.x.x.x/z tap(4)'s address is x.x.x.x 1305 * tap(4)'s netmask len is z 1306 * 1307 * 3) x.x.x.x:y.y.y.y tap(4)'s address is x.x.x.x 1308 * pseudo netif's address is y.y.y.y 1309 * 1310 * 4) x.x.x.x:y.y.y.y/z tap(4)'s address is x.x.x.x 1311 * pseudo netif's address is y.y.y.y 1312 * tap(4) and pseudo netif's netmask len are z 1313 * 1314 * 5) bridgeX tap(4) will be added to bridgeX 1315 * 1316 * 6) bridgeX:y.y.y.y tap(4) will be added to bridgeX 1317 * pseudo netif's address is y.y.y.y 1318 * 1319 * 7) bridgeX:y.y.y.y/z tap(4) will be added to bridgeX 1320 * pseudo netif's address is y.y.y.y 1321 * pseudo netif's netmask len is z 1322 */ 1323 static 1324 int 1325 netif_init_tap(int tap_unit, in_addr_t *addr, in_addr_t *mask, int s) 1326 { 1327 in_addr_t tap_addr, netmask, netif_addr; 1328 int next_netif_addr; 1329 char *tok, *masklen_str, *ifbridge; 1330 1331 *addr = 0; 1332 *mask = 0; 1333 1334 tok = strtok(NULL, ":/"); 1335 if (tok == NULL) { 1336 /* 1337 * Nothing special, simply use tap(4) as backend 1338 */ 1339 return 0; 1340 } 1341 1342 if (inet_pton(AF_INET, tok, &tap_addr) > 0) { 1343 /* 1344 * tap(4)'s address is supplied 1345 */ 1346 ifbridge = NULL; 1347 1348 /* 1349 * If there is next token, then it may be pseudo 1350 * netif's address or netmask len for tap(4) 1351 */ 1352 next_netif_addr = 0; 1353 } else { 1354 /* 1355 * Not tap(4)'s address, assume it as a bridge(4) 1356 * iface name 1357 */ 1358 tap_addr = 0; 1359 ifbridge = tok; 1360 1361 /* 1362 * If there is next token, then it must be pseudo 1363 * netif's address 1364 */ 1365 next_netif_addr = 1; 1366 } 1367 1368 netmask = netif_addr = 0; 1369 1370 tok = strtok(NULL, ":/"); 1371 if (tok == NULL) 1372 goto back; 1373 1374 if (inet_pton(AF_INET, tok, &netif_addr) <= 0) { 1375 if (next_netif_addr) { 1376 warnx("Invalid pseudo netif address: %s", tok); 1377 return -1; 1378 } 1379 netif_addr = 0; 1380 1381 /* 1382 * Current token is not address, then it must be netmask len 1383 */ 1384 masklen_str = tok; 1385 } else { 1386 /* 1387 * Current token is pseudo netif address, if there is next token 1388 * it must be netmask len 1389 */ 1390 masklen_str = strtok(NULL, "/"); 1391 } 1392 1393 /* Calculate netmask */ 1394 if (masklen_str != NULL) { 1395 u_long masklen; 1396 1397 masklen = strtoul(masklen_str, NULL, 10); 1398 if (masklen < 32 && masklen > 0) { 1399 netmask = 1400 htonl(rounddown2(0xffffffff, 1LL << (32 - masklen))); 1401 } else { 1402 warnx("Invalid netmask len: %lu", masklen); 1403 return -1; 1404 } 1405 } 1406 1407 /* Make sure there is no more token left */ 1408 if (strtok(NULL, ":/") != NULL) { 1409 warnx("Invalid argument to '-I'"); 1410 return -1; 1411 } 1412 1413 back: 1414 if (tap_unit < 0) { 1415 /* Do nothing */ 1416 } else if (ifbridge == NULL) { 1417 /* Set tap(4) address/netmask */ 1418 if (netif_set_tapaddr(tap_unit, tap_addr, netmask, s) < 0) 1419 return -1; 1420 } else { 1421 /* Tie tap(4) to bridge(4) */ 1422 if (netif_add_tap2brg(tap_unit, ifbridge, s) < 0) 1423 return -1; 1424 } 1425 1426 *addr = netif_addr; 1427 *mask = netmask; 1428 return 0; 1429 } 1430 1431 /* 1432 * NetifInfo[] will be filled for pseudo netif initialization. 1433 * NetifNum will be bumped to reflect the number of valid entries 1434 * in NetifInfo[]. 1435 */ 1436 static 1437 void 1438 init_netif(char *netifExp[], int netifExpNum) 1439 { 1440 int i, s; 1441 char *tmp; 1442 1443 if (netifExpNum == 0) 1444 return; 1445 1446 s = socket(AF_INET, SOCK_DGRAM, 0); /* for ioctl(SIOC) */ 1447 if (s < 0) 1448 return; 1449 1450 for (i = 0; i < netifExpNum; ++i) { 1451 struct vknetif_info *info; 1452 in_addr_t netif_addr, netif_mask; 1453 int tap_fd, tap_unit; 1454 char *netif; 1455 1456 /* Extract MAC address if there is one */ 1457 tmp = netifExp[i]; 1458 strsep(&tmp, "="); 1459 1460 netif = strtok(netifExp[i], ":"); 1461 if (netif == NULL) { 1462 warnx("Invalid argument to '-I'"); 1463 continue; 1464 } 1465 1466 /* 1467 * Open tap(4) device file and bring up the 1468 * corresponding interface 1469 */ 1470 tap_fd = netif_open_tap(netif, &tap_unit, s); 1471 if (tap_fd < 0) 1472 continue; 1473 1474 /* 1475 * Initialize tap(4) and get address/netmask 1476 * for pseudo netif 1477 * 1478 * NB: Rest part of netifExp[i] is passed 1479 * to netif_init_tap() implicitly. 1480 */ 1481 if (netif_init_tap(tap_unit, &netif_addr, &netif_mask, s) < 0) { 1482 /* 1483 * NB: Closing tap(4) device file will bring 1484 * down the corresponding interface 1485 */ 1486 close(tap_fd); 1487 continue; 1488 } 1489 1490 info = &NetifInfo[NetifNum]; 1491 bzero(info, sizeof(*info)); 1492 info->tap_fd = tap_fd; 1493 info->tap_unit = tap_unit; 1494 info->netif_addr = netif_addr; 1495 info->netif_mask = netif_mask; 1496 /* 1497 * If tmp isn't NULL it means a MAC could have been 1498 * specified so attempt to convert it. 1499 * Setting enaddr to NULL will tell vke_attach() we 1500 * need a pseudo-random MAC address. 1501 */ 1502 if (tmp != NULL) { 1503 if ((info->enaddr = malloc(ETHER_ADDR_LEN)) == NULL) 1504 warnx("Couldn't allocate memory for the operation"); 1505 else { 1506 if ((kether_aton(tmp, info->enaddr)) == NULL) { 1507 free(info->enaddr); 1508 info->enaddr = NULL; 1509 } 1510 } 1511 } 1512 1513 NetifNum++; 1514 if (NetifNum >= VKNETIF_MAX) /* XXX will this happen? */ 1515 break; 1516 } 1517 close(s); 1518 } 1519 1520 /* 1521 * Create the pid file and leave it open and locked while the vkernel is 1522 * running. This allows a script to use /usr/bin/lockf to probe whether 1523 * a vkernel is still running (so as not to accidently kill an unrelated 1524 * process from a stale pid file). 1525 */ 1526 static 1527 void 1528 writepid(void) 1529 { 1530 char buf[32]; 1531 int fd; 1532 1533 if (pid_file != NULL) { 1534 snprintf(buf, sizeof(buf), "%ld\n", (long)getpid()); 1535 fd = open(pid_file, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0666); 1536 if (fd < 0) { 1537 if (errno == EWOULDBLOCK) { 1538 perror("Failed to lock pidfile, " 1539 "vkernel already running"); 1540 } else { 1541 perror("Failed to create pidfile"); 1542 } 1543 exit(EX_SOFTWARE); 1544 } 1545 ftruncate(fd, 0); 1546 write(fd, buf, strlen(buf)); 1547 /* leave the file open to maintain the lock */ 1548 } 1549 } 1550 1551 static 1552 void 1553 cleanpid( void ) 1554 { 1555 if (pid_file != NULL) { 1556 if (unlink(pid_file) < 0) 1557 perror("Warning: couldn't remove pidfile"); 1558 } 1559 } 1560 1561 static 1562 void 1563 usage_err(const char *ctl, ...) 1564 { 1565 va_list va; 1566 1567 va_start(va, ctl); 1568 vfprintf(stderr, ctl, va); 1569 va_end(va); 1570 fprintf(stderr, "\n"); 1571 exit(EX_USAGE); 1572 } 1573 1574 static 1575 void 1576 usage_help(_Bool help) 1577 { 1578 fprintf(stderr, "Usage: %s [-hsUvdt] [-c file] [-e name=value:name=value:...]\n" 1579 "\t[-i file] [-I interface[:address1[:address2][/netmask]]] [-l cpulock]\n" 1580 "\t[-m size] [-n numcpus[:lbits[:cbits]]]\n" 1581 "\t[-p file] [-r file]\n", save_av[0]); 1582 1583 if (help) 1584 fprintf(stderr, "\nArguments:\n" 1585 "\t-c\tSpecify a readonly CD-ROM image file to be used by the kernel.\n" 1586 "\t-e\tSpecify an environment to be used by the kernel.\n" 1587 "\t-h\tThis list of options.\n" 1588 "\t-i\tSpecify a memory image file to be used by the virtual kernel.\n" 1589 "\t-I\tCreate a virtual network device.\n" 1590 "\t-l\tSpecify which, if any, real CPUs to lock virtual CPUs to.\n" 1591 "\t-m\tSpecify the amount of memory to be used by the kernel in bytes.\n" 1592 "\t-n\tSpecify the number of CPUs and the topology you wish to emulate:\n" 1593 "\t\t\tnumcpus - number of cpus\n" 1594 "\t\t\tlbits - specify the number of bits within APICID(=CPUID)\n" 1595 "\t\t\t needed for representing the logical ID.\n" 1596 "\t\t\t Controls the number of threads/core:\n" 1597 "\t\t\t (0 bits - 1 thread, 1 bit - 2 threads).\n" 1598 "\t\t\tcbits - specify the number of bits within APICID(=CPUID)\n" 1599 "\t\t\t needed for representing the core ID.\n" 1600 "\t\t\t Controls the number of cores/package:\n" 1601 "\t\t\t (0 bits - 1 core, 1 bit - 2 cores).\n" 1602 "\t-p\tSpecify a file in which to store the process ID.\n" 1603 "\t-r\tSpecify a R/W disk image file, iterates vkd0..n\n" 1604 "\t-R\tSpecify a COW disk image file, iterates vkd0..n\n" 1605 "\t-s\tBoot into single-user mode.\n" 1606 "\t-t\tUse a precise host timer when calculating clock values.\n" 1607 "\t-U\tEnable writing to kernel memory and module loading.\n" 1608 "\t-v\tTurn on verbose booting.\n"); 1609 1610 exit(EX_USAGE); 1611 } 1612 1613 void 1614 cpu_smp_stopped(void) 1615 { 1616 } 1617 1618 void 1619 cpu_reset(void) 1620 { 1621 kprintf("cpu reset, rebooting vkernel\n"); 1622 closefrom(3); 1623 cleanpid(); 1624 exit(EX_VKERNEL_REBOOT); 1625 } 1626 1627 void 1628 cpu_halt(void) 1629 { 1630 kprintf("cpu halt, exiting vkernel\n"); 1631 cleanpid(); 1632 exit(EX_OK); 1633 } 1634 1635 void 1636 setrealcpu(void) 1637 { 1638 switch(lwp_cpu_lock) { 1639 case LCL_PER_CPU: 1640 if (bootverbose) 1641 kprintf("Locking CPU%d to real cpu %d\n", 1642 mycpuid, next_cpu); 1643 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu)); 1644 next_cpu++; 1645 if (next_cpu >= real_ncpus) 1646 next_cpu = 0; 1647 break; 1648 case LCL_SINGLE_CPU: 1649 if (bootverbose) 1650 kprintf("Locking CPU%d to real cpu %d\n", 1651 mycpuid, next_cpu); 1652 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu)); 1653 break; 1654 default: 1655 /* do not map virtual cpus to real cpus */ 1656 break; 1657 } 1658 } 1659 1660 /* 1661 * Allocate and free memory for module loading. The loaded module 1662 * has to be placed somewhere near the current kernel binary load 1663 * point or the relocations will not work. 1664 * 1665 * I'm not sure why this isn't working. 1666 */ 1667 int 1668 vkernel_module_memory_alloc(vm_offset_t *basep, size_t bytes) 1669 { 1670 #if 1 1671 size_t xtra; 1672 xtra = (PAGE_SIZE - (vm_offset_t)sbrk(0)) & PAGE_MASK; 1673 *basep = (vm_offset_t)sbrk(xtra + bytes) + xtra; 1674 bzero((void *)*basep, bytes); 1675 #else 1676 *basep = (vm_offset_t)mmap((void *)0x000000000, bytes, 1677 PROT_READ|PROT_WRITE|PROT_EXEC, 1678 MAP_ANON|MAP_SHARED, -1, 0); 1679 if ((void *)*basep == MAP_FAILED) 1680 return ENOMEM; 1681 #endif 1682 return 0; 1683 } 1684 1685 void 1686 vkernel_module_memory_free(vm_offset_t base, size_t bytes) 1687 { 1688 #if 0 1689 #if 0 1690 munmap((void *)base, bytes); 1691 #endif 1692 #endif 1693 } 1694