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 #include <pthread.h> 85 86 #define EX_VKERNEL_REBOOT 32 87 88 vm_phystable_t phys_avail[16]; 89 vm_paddr_t Maxmem; 90 vm_paddr_t Maxmem_bytes; 91 long physmem; 92 int MemImageFd = -1; 93 struct vkdisk_info DiskInfo[VKDISK_MAX]; 94 int DiskNum; 95 struct vknetif_info NetifInfo[VKNETIF_MAX]; 96 int NetifNum; 97 char *pid_file; 98 vm_offset_t KvaStart; 99 vm_offset_t KvaEnd; 100 vm_offset_t KvaSize; 101 vm_offset_t virtual_start; 102 vm_offset_t virtual_end; 103 vm_offset_t virtual2_start; 104 vm_offset_t virtual2_end; 105 vm_offset_t kernel_vm_end; 106 vm_offset_t crashdumpmap; 107 vm_offset_t clean_sva; 108 vm_offset_t clean_eva; 109 struct msgbuf *msgbufp; 110 caddr_t ptvmmap; 111 vpte_t *KernelPTD; 112 vpte_t *KernelPTA; /* Warning: Offset for direct VA translation */ 113 void *dmap_min_address; 114 void *vkernel_stack; 115 u_int cpu_feature; /* XXX */ 116 int tsc_present; 117 int tsc_invariant; 118 int tsc_mpsync; 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 tsc_uclock_t tsc_frequency; 131 tsc_uclock_t tsc_oneus_approx; 132 133 extern uint64_t KPML4phys; /* phys addr of kernel level 4 */ 134 135 static struct trapframe proc0_tf; 136 static void *proc0paddr; 137 138 static void init_sys_memory(char *imageFile); 139 static void init_kern_memory(void); 140 static void init_kern_memory_vmm(void); 141 static void init_globaldata(void); 142 static void init_vkernel(void); 143 static void init_disk(char **diskExp, int *diskFlags, int diskFileNum, enum vkdisk_type type); 144 static void init_netif(char *netifExp[], int netifFileNum); 145 static void writepid(void); 146 static void cleanpid(void); 147 static int unix_connect(const char *path); 148 static void usage_err(const char *ctl, ...) __printflike(1, 2); 149 static void usage_help(_Bool); 150 static void init_locks(void); 151 static void handle_term(int); 152 153 pid_t childpid; 154 155 static int save_ac; 156 static int prezeromem; 157 static char **save_av; 158 159 /* 160 * Kernel startup for virtual kernels - standard main() 161 */ 162 int 163 main(int ac, char **av) 164 { 165 char *memImageFile = NULL; 166 char *netifFile[VKNETIF_MAX]; 167 char *diskFile[VKDISK_MAX]; 168 char *cdFile[VKDISK_MAX]; 169 char *suffix; 170 char *endp; 171 char *tmp; 172 char *tok; 173 int diskFlags[VKDISK_MAX]; 174 int netifFileNum = 0; 175 int diskFileNum = 0; 176 int cdFileNum = 0; 177 int bootOnDisk = -1; /* set below to vcd (0) or vkd (1) */ 178 int c; 179 int i; 180 int j; 181 int n; 182 int isq; 183 int pos; 184 int eflag; 185 int dflag = 0; /* disable vmm */ 186 int real_vkernel_enable; 187 int supports_sse; 188 uint32_t mxcsr_mask; 189 size_t vsize; 190 size_t msize; 191 size_t kenv_size; 192 size_t kenv_size2; 193 int status; 194 struct sigaction sa; 195 196 /* 197 * Currently a bad hack but rtld-elf needs LD_SHAREDLIB_BASE to 198 * be set to force it to mmap() shared libraries into low memory, 199 * so our module loader can link against the related symbols. 200 */ 201 if (getenv("LD_SHAREDLIB_BASE") == NULL) { 202 setenv("LD_SHAREDLIB_BASE", "0x10000000", 1); 203 execv(av[0], av); 204 fprintf(stderr, "Must run %s with full path\n", av[0]); 205 exit(1); 206 } 207 208 while ((childpid = fork()) != 0) { 209 /* Ignore signals */ 210 bzero(&sa, sizeof(sa)); 211 sigemptyset(&sa.sa_mask); 212 sa.sa_handler = SIG_IGN; 213 sigaction(SIGINT, &sa, NULL); 214 sigaction(SIGQUIT, &sa, NULL); 215 sigaction(SIGHUP, &sa, NULL); 216 217 /* 218 * Forward SIGTERM to the child so that 219 * the shutdown process initiates correctly. 220 */ 221 sa.sa_handler = handle_term; 222 sigaction(SIGTERM, &sa, NULL); 223 224 /* 225 * Wait for child to terminate, exit if 226 * someone stole our child. 227 */ 228 while (waitpid(childpid, &status, 0) != childpid) { 229 if (errno == ECHILD) 230 exit(1); 231 } 232 if (WEXITSTATUS(status) != EX_VKERNEL_REBOOT) 233 return 0; 234 } 235 236 /* 237 * Starting for real 238 */ 239 save_ac = ac; 240 save_av = av; 241 eflag = 0; 242 pos = 0; 243 kenv_size = 0; 244 245 /* 246 * Process options 247 */ 248 kernel_mem_readonly = 1; 249 optcpus = 2; 250 cpu_bits = 1; 251 vkernel_b_arg = 0; 252 vkernel_B_arg = 0; 253 lwp_cpu_lock = LCL_NONE; 254 255 real_vkernel_enable = 0; 256 vsize = sizeof(real_vkernel_enable); 257 sysctlbyname("vm.vkernel_enable", &real_vkernel_enable, &vsize, NULL,0); 258 259 if (real_vkernel_enable == 0) { 260 errx(1, "vm.vkernel_enable is 0, must be set " 261 "to 1 to execute a vkernel!"); 262 } 263 264 real_ncpus = 1; 265 vsize = sizeof(real_ncpus); 266 sysctlbyname("hw.ncpu", &real_ncpus, &vsize, NULL, 0); 267 268 if (ac < 2) 269 usage_help(false); 270 271 while ((c = getopt(ac, av, "c:hsvztTl:m:n:r:R:e:i:p:I:Ud")) != -1) { 272 switch(c) { 273 case 'd': 274 dflag = 1; 275 break; 276 case 'e': 277 /* 278 * name=value:name=value:name=value... 279 * name="value"... 280 * 281 * Allow values to be quoted but note that shells 282 * may remove the quotes, so using this feature 283 * to embed colons may require a backslash. 284 */ 285 n = strlen(optarg); 286 isq = 0; 287 288 if (eflag == 0) { 289 kenv_size = n + 2; 290 kern_envp = malloc(kenv_size); 291 if (kern_envp == NULL) 292 errx(1, "Couldn't allocate %zd bytes for kern_envp", kenv_size); 293 } else { 294 kenv_size2 = kenv_size + n + 1; 295 pos = kenv_size - 1; 296 if ((tmp = realloc(kern_envp, kenv_size2)) == NULL) 297 errx(1, "Couldn't reallocate %zd bytes for kern_envp", kenv_size2); 298 kern_envp = tmp; 299 kenv_size = kenv_size2; 300 } 301 302 for (i = 0, j = pos; i < n; ++i) { 303 if (optarg[i] == '"') 304 isq ^= 1; 305 else if (optarg[i] == '\'') 306 isq ^= 2; 307 else if (isq == 0 && optarg[i] == ':') 308 kern_envp[j++] = 0; 309 else 310 kern_envp[j++] = optarg[i]; 311 } 312 kern_envp[j++] = 0; 313 kern_envp[j++] = 0; 314 eflag++; 315 break; 316 case 's': 317 boothowto |= RB_SINGLE; 318 break; 319 case 't': 320 use_precise_timer = 1; 321 break; 322 case 'v': 323 bootverbose = 1; 324 break; 325 case 'i': 326 memImageFile = optarg; 327 break; 328 case 'I': 329 if (netifFileNum < VKNETIF_MAX) 330 netifFile[netifFileNum++] = strdup(optarg); 331 break; 332 case 'r': 333 case 'R': 334 if (bootOnDisk < 0) 335 bootOnDisk = 1; 336 if (diskFileNum + cdFileNum < VKDISK_MAX) { 337 diskFile[diskFileNum] = strdup(optarg); 338 diskFlags[diskFileNum] = (c == 'R'); 339 ++diskFileNum; 340 } 341 break; 342 case 'c': 343 if (bootOnDisk < 0) 344 bootOnDisk = 0; 345 if (diskFileNum + cdFileNum < VKDISK_MAX) 346 cdFile[cdFileNum++] = strdup(optarg); 347 break; 348 case 'm': 349 Maxmem_bytes = strtoull(optarg, &suffix, 0); 350 if (suffix) { 351 switch(*suffix) { 352 case 'g': 353 case 'G': 354 Maxmem_bytes <<= 30; 355 break; 356 case 'm': 357 case 'M': 358 Maxmem_bytes <<= 20; 359 break; 360 case 'k': 361 case 'K': 362 Maxmem_bytes <<= 10; 363 break; 364 default: 365 Maxmem_bytes = 0; 366 usage_err("Bad maxmem option"); 367 /* NOT REACHED */ 368 break; 369 } 370 } 371 break; 372 case 'l': 373 next_cpu = -1; 374 if (strncmp("map", optarg, 3) == 0) { 375 lwp_cpu_lock = LCL_PER_CPU; 376 if (optarg[3] == ',') { 377 next_cpu = strtol(optarg+4, &endp, 0); 378 if (*endp != '\0') 379 usage_err("Bad target CPU number at '%s'", endp); 380 } else { 381 next_cpu = 0; 382 } 383 if (next_cpu < 0 || next_cpu > real_ncpus - 1) 384 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1); 385 } else if (strncmp("any", optarg, 3) == 0) { 386 lwp_cpu_lock = LCL_NONE; 387 } else { 388 lwp_cpu_lock = LCL_SINGLE_CPU; 389 next_cpu = strtol(optarg, &endp, 0); 390 if (*endp != '\0') 391 usage_err("Bad target CPU number at '%s'", endp); 392 if (next_cpu < 0 || next_cpu > real_ncpus - 1) 393 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1); 394 } 395 break; 396 case 'n': 397 /* 398 * This value is set up by mp_start(), don't just 399 * set ncpus here. 400 */ 401 tok = strtok(optarg, ":"); 402 optcpus = strtol(tok, NULL, 0); 403 if (optcpus < 1 || optcpus > MAXCPU) 404 usage_err("Bad ncpus, valid range is 1-%d", MAXCPU); 405 cpu_bits = 1; 406 while ((1 << cpu_bits) < optcpus) 407 ++cpu_bits; 408 409 /* 410 * By default assume simple hyper-threading 411 */ 412 vkernel_b_arg = 1; 413 vkernel_B_arg = cpu_bits - vkernel_b_arg; 414 415 /* 416 * [:lbits[:cbits]] override # of cpu bits 417 * for logical and core extraction, supplying 418 * defaults for any omission. 419 */ 420 tok = strtok(NULL, ":"); 421 if (tok != NULL) { 422 vkernel_b_arg = strtol(tok, NULL, 0); 423 vkernel_B_arg = cpu_bits - vkernel_b_arg; 424 425 /* :cbits argument */ 426 tok = strtok(NULL, ":"); 427 if (tok != NULL) { 428 vkernel_B_arg = strtol(tok, NULL, 0); 429 } 430 } 431 break; 432 case 'p': 433 pid_file = optarg; 434 break; 435 case 'U': 436 kernel_mem_readonly = 0; 437 break; 438 case 'h': 439 usage_help(true); 440 break; 441 case 'z': 442 prezeromem = 1; 443 break; 444 default: 445 usage_help(false); 446 } 447 } 448 449 /* 450 * Check VMM presence 451 */ 452 vsize = sizeof(vmm_enabled); 453 sysctlbyname("hw.vmm.enable", &vmm_enabled, &vsize, NULL, 0); 454 vmm_enabled = (vmm_enabled && !dflag); 455 456 writepid(); 457 cpu_disable_intr(); 458 if (vmm_enabled) { 459 /* use a MAP_ANON directly */ 460 printf("VMM is available\n"); 461 init_kern_memory_vmm(); 462 } else { 463 printf("VMM is not available\n"); 464 init_sys_memory(memImageFile); 465 init_kern_memory(); 466 } 467 init_globaldata(); 468 init_vkernel(); 469 setrealcpu(); 470 init_kqueue(); 471 472 vmm_guest = VMM_GUEST_VKERNEL; 473 474 /* 475 * Check TSC 476 */ 477 vsize = sizeof(tsc_present); 478 sysctlbyname("hw.tsc_present", &tsc_present, &vsize, NULL, 0); 479 vsize = sizeof(tsc_invariant); 480 sysctlbyname("hw.tsc_invariant", &tsc_invariant, &vsize, NULL, 0); 481 vsize = sizeof(tsc_mpsync); 482 sysctlbyname("hw.tsc_mpsync", &tsc_mpsync, &vsize, NULL, 0); 483 vsize = sizeof(tsc_frequency); 484 sysctlbyname("hw.tsc_frequency", &tsc_frequency, &vsize, NULL, 0); 485 if (tsc_present) 486 cpu_feature |= CPUID_TSC; 487 tsc_oneus_approx = ((tsc_frequency|1) + 999999) / 1000000; 488 489 /* 490 * Check SSE 491 */ 492 vsize = sizeof(supports_sse); 493 supports_sse = 0; 494 sysctlbyname("hw.instruction_sse", &supports_sse, &vsize, NULL, 0); 495 sysctlbyname("hw.mxcsr_mask", &mxcsr_mask, &msize, NULL, 0); 496 init_fpu(supports_sse); 497 if (supports_sse) 498 cpu_feature |= CPUID_SSE | CPUID_FXSR; 499 500 /* 501 * We boot from the first installed disk. 502 */ 503 if (bootOnDisk == 1) { 504 init_disk(diskFile, diskFlags, diskFileNum, VKD_DISK); 505 init_disk(cdFile, NULL, cdFileNum, VKD_CD); 506 } else { 507 init_disk(cdFile, NULL, cdFileNum, VKD_CD); 508 init_disk(diskFile, diskFlags, diskFileNum, VKD_DISK); 509 } 510 511 init_netif(netifFile, netifFileNum); 512 init_exceptions(); 513 mi_startup(); 514 /* NOT REACHED */ 515 exit(EX_SOFTWARE); 516 } 517 518 /* SIGTERM handler */ 519 static 520 void 521 handle_term(int sig) 522 { 523 kill(childpid, sig); 524 } 525 526 /* 527 * Initialize system memory. This is the virtual kernel's 'RAM'. 528 */ 529 static 530 void 531 init_sys_memory(char *imageFile) 532 { 533 struct stat st; 534 int i; 535 int fd; 536 537 /* 538 * Figure out the system memory image size. If an image file was 539 * specified and -m was not specified, use the image file's size. 540 */ 541 if (imageFile && stat(imageFile, &st) == 0 && Maxmem_bytes == 0) 542 Maxmem_bytes = (vm_paddr_t)st.st_size; 543 if ((imageFile == NULL || stat(imageFile, &st) < 0) && 544 Maxmem_bytes == 0) { 545 errx(1, "Cannot create new memory file %s unless " 546 "system memory size is specified with -m", 547 imageFile); 548 /* NOT REACHED */ 549 } 550 551 /* 552 * Maxmem must be known at this time 553 */ 554 if (Maxmem_bytes < 64 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) { 555 errx(1, "Bad maxmem specification: 64MB minimum, " 556 "multiples of %dMB only", 557 SEG_SIZE / 1024 / 1024); 558 /* NOT REACHED */ 559 } 560 561 /* 562 * Generate an image file name if necessary, then open/create the 563 * file exclusively locked. Do not allow multiple virtual kernels 564 * to use the same image file. 565 * 566 * Don't iterate through a million files if we do not have write 567 * access to the directory, stop if our open() failed on a 568 * non-existant file. Otherwise opens can fail for any number 569 */ 570 if (imageFile == NULL) { 571 for (i = 0; i < 1000000; ++i) { 572 asprintf(&imageFile, "/var/vkernel/memimg.%06d", i); 573 fd = open(imageFile, 574 O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644); 575 if (fd < 0 && stat(imageFile, &st) == 0) { 576 free(imageFile); 577 continue; 578 } 579 break; 580 } 581 } else { 582 fd = open(imageFile, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644); 583 } 584 fprintf(stderr, "Using memory file: %s\n", imageFile); 585 if (fd < 0 || fstat(fd, &st) < 0) { 586 err(1, "Unable to open/create %s", imageFile); 587 /* NOT REACHED */ 588 } 589 590 /* 591 * Truncate or extend the file as necessary. Clean out the contents 592 * of the file, we want it to be full of holes so we don't waste 593 * time reading in data from an old file that we no longer care 594 * about. 595 */ 596 ftruncate(fd, 0); 597 ftruncate(fd, Maxmem_bytes); 598 599 MemImageFd = fd; 600 Maxmem = Maxmem_bytes >> PAGE_SHIFT; 601 physmem = Maxmem; 602 } 603 604 /* 605 * Initialize kernel memory. This reserves kernel virtual memory by using 606 * MAP_VPAGETABLE 607 * 608 * XXX NOTE! MAP_VPAGETABLE is being ripped out and will break VKERNELs 609 * for a while, until we get hardware virtualization working. 610 */ 611 612 static 613 void 614 init_kern_memory(void) 615 { 616 void *base; 617 int i; 618 void *firstfree; 619 620 /* 621 * Memory map our kernel virtual memory space. Note that the 622 * kernel image itself is not made part of this memory for the 623 * moment. 624 * 625 * The memory map must be segment-aligned so we can properly 626 * offset KernelPTD. 627 * 628 * If the system kernel has a different MAXDSIZ, it might not 629 * be possible to map kernel memory in its prefered location. 630 * Try a number of different locations. 631 */ 632 633 base = mmap((void*)KERNEL_KVA_START, KERNEL_KVA_SIZE, 634 PROT_READ|PROT_WRITE|PROT_EXEC, 635 MAP_FILE|MAP_SHARED|MAP_VPAGETABLE|MAP_FIXED|MAP_TRYFIXED, 636 MemImageFd, (off_t)KERNEL_KVA_START); 637 638 if (base == MAP_FAILED) { 639 err(1, "Unable to mmap() kernel virtual memory!"); 640 /* NOT REACHED */ 641 } 642 madvise(base, KERNEL_KVA_SIZE, MADV_NOSYNC); 643 KvaStart = (vm_offset_t)base; 644 KvaSize = KERNEL_KVA_SIZE; 645 KvaEnd = KvaStart + KvaSize; 646 647 /* cannot use kprintf yet */ 648 printf("KVM mapped at %p-%p\n", (void *)KvaStart, (void *)KvaEnd); 649 650 /* MAP_FILE? */ 651 dmap_min_address = mmap(0, DMAP_SIZE, PROT_READ|PROT_WRITE, 652 MAP_NOCORE|MAP_NOSYNC|MAP_SHARED, 653 MemImageFd, 0); 654 if (dmap_min_address == MAP_FAILED) { 655 err(1, "Unable to mmap() kernel DMAP region!"); 656 /* NOT REACHED */ 657 } 658 659 /* 660 * Prefault the memory. The vkernel is going to fault it all in 661 * anyway, and faults on the backing store itself are very expensive 662 * once we go SMP (contend a lot). So do it now. 663 */ 664 if (prezeromem) 665 bzero(dmap_min_address, Maxmem_bytes); 666 667 /* 668 * Bootstrap the kernel_pmap 669 */ 670 firstfree = NULL; 671 pmap_bootstrap((vm_paddr_t *)&firstfree, (int64_t)base); 672 673 mcontrol(base, KERNEL_KVA_SIZE, MADV_SETMAP, 674 0 | VPTE_RW | VPTE_V); 675 676 /* 677 * phys_avail[] represents unallocated physical memory. MI code 678 * will use phys_avail[] to create the vm_page array. 679 */ 680 phys_avail[0].phys_beg = (vm_paddr_t)firstfree; 681 phys_avail[0].phys_beg = (phys_avail[0].phys_beg + PAGE_MASK) & 682 ~(vm_paddr_t)PAGE_MASK; 683 phys_avail[0].phys_end = Maxmem_bytes; 684 685 #if 0 /* JGV */ 686 /* 687 * (virtual_start, virtual_end) represent unallocated kernel virtual 688 * memory. MI code will create kernel_map using these parameters. 689 */ 690 virtual_start = KvaStart + (long)firstfree; 691 virtual_start = (virtual_start + PAGE_MASK) & ~(vm_offset_t)PAGE_MASK; 692 virtual_end = KvaStart + KERNEL_KVA_SIZE; 693 #endif 694 695 /* 696 * pmap_growkernel() will set the correct value. 697 */ 698 kernel_vm_end = 0; 699 700 /* 701 * Allocate space for process 0's UAREA. 702 */ 703 proc0paddr = (void *)virtual_start; 704 for (i = 0; i < UPAGES; ++i) { 705 pmap_kenter_quick(virtual_start, phys_avail[0].phys_beg); 706 virtual_start += PAGE_SIZE; 707 phys_avail[0].phys_beg += PAGE_SIZE; 708 } 709 710 /* 711 * crashdumpmap 712 */ 713 crashdumpmap = virtual_start; 714 virtual_start += MAXDUMPPGS * PAGE_SIZE; 715 716 /* 717 * msgbufp maps the system message buffer 718 */ 719 assert((MSGBUF_SIZE & PAGE_MASK) == 0); 720 msgbufp = (void *)virtual_start; 721 for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) { 722 pmap_kenter_quick(virtual_start, phys_avail[0].phys_beg); 723 virtual_start += PAGE_SIZE; 724 phys_avail[0].phys_beg += PAGE_SIZE; 725 } 726 msgbufinit(msgbufp, MSGBUF_SIZE); 727 728 /* 729 * used by kern_memio for /dev/mem access 730 */ 731 ptvmmap = (caddr_t)virtual_start; 732 virtual_start += PAGE_SIZE; 733 } 734 735 static 736 void 737 init_kern_memory_vmm(void) 738 { 739 int i; 740 void *firstfree; 741 struct vmm_guest_options options; 742 void *dmap_address; 743 744 KvaStart = (vm_offset_t)KERNEL_KVA_START; 745 KvaSize = KERNEL_KVA_SIZE; 746 KvaEnd = KvaStart + KvaSize; 747 748 Maxmem = Maxmem_bytes >> PAGE_SHIFT; 749 physmem = Maxmem; 750 751 if (Maxmem_bytes < 64 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) { 752 errx(1, "Bad maxmem specification: 64MB minimum, " 753 "multiples of %dMB only", 754 SEG_SIZE / 1024 / 1024); 755 /* NOT REACHED */ 756 } 757 758 /* Call the vmspace_create to allocate the internal 759 * vkernel structures. Won't do anything else (no new 760 * vmspace) 761 */ 762 if (vmspace_create(NULL, 0, NULL) < 0) 763 panic("vmspace_create() failed"); 764 765 766 /* 767 * MAP_ANON the region of the VKERNEL phyisical memory 768 * (known as GPA - Guest Physical Address 769 */ 770 dmap_address = mmap(NULL, Maxmem_bytes, 771 PROT_READ|PROT_WRITE|PROT_EXEC, 772 MAP_ANON|MAP_SHARED, -1, 0); 773 if (dmap_address == MAP_FAILED) { 774 err(1, "Unable to mmap() RAM region!"); 775 /* NOT REACHED */ 776 } 777 if (prezeromem) 778 bzero(dmap_address, Maxmem_bytes); 779 780 /* Alloc a new stack in the lowmem */ 781 vkernel_stack = mmap(NULL, KERNEL_STACK_SIZE, 782 PROT_READ|PROT_WRITE|PROT_EXEC, 783 MAP_ANON, -1, 0); 784 if (vkernel_stack == MAP_FAILED) { 785 err(1, "Unable to allocate stack\n"); 786 } 787 788 /* 789 * Bootstrap the kernel_pmap 790 */ 791 firstfree = dmap_address; 792 dmap_min_address = NULL; /* VIRT == PHYS in the first 512G */ 793 pmap_bootstrap((vm_paddr_t *)&firstfree, (uint64_t)KvaStart); 794 795 /* 796 * Enter VMM mode 797 */ 798 bzero(&options, sizeof(options)); 799 options.guest_cr3 = (register_t) KPML4phys; 800 options.new_stack = (uint64_t) vkernel_stack + KERNEL_STACK_SIZE; 801 options.master = 1; 802 if (vmm_guest_ctl(VMM_GUEST_RUN, &options)) { 803 err(1, "Unable to enter VMM mode."); 804 } 805 806 /* 807 * phys_avail[] represents unallocated physical memory. MI code 808 * will use phys_avail[] to create the vm_page array. 809 */ 810 phys_avail[0].phys_beg = (vm_paddr_t)firstfree; 811 phys_avail[0].phys_beg = (phys_avail[0].phys_beg + PAGE_MASK) & 812 ~(vm_paddr_t)PAGE_MASK; 813 phys_avail[0].phys_end = (vm_paddr_t)dmap_address + Maxmem_bytes; 814 815 /* 816 * pmap_growkernel() will set the correct value. 817 */ 818 kernel_vm_end = 0; 819 820 /* 821 * Allocate space for process 0's UAREA. 822 */ 823 proc0paddr = (void *)virtual_start; 824 for (i = 0; i < UPAGES; ++i) { 825 pmap_kenter_quick(virtual_start, phys_avail[0].phys_beg); 826 virtual_start += PAGE_SIZE; 827 phys_avail[0].phys_beg += PAGE_SIZE; 828 } 829 830 /* 831 * crashdumpmap 832 */ 833 crashdumpmap = virtual_start; 834 virtual_start += MAXDUMPPGS * PAGE_SIZE; 835 836 /* 837 * msgbufp maps the system message buffer 838 */ 839 assert((MSGBUF_SIZE & PAGE_MASK) == 0); 840 msgbufp = (void *)virtual_start; 841 for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) { 842 843 pmap_kenter_quick(virtual_start, phys_avail[0].phys_beg); 844 virtual_start += PAGE_SIZE; 845 phys_avail[0].phys_beg += PAGE_SIZE; 846 } 847 848 msgbufinit(msgbufp, MSGBUF_SIZE); 849 850 /* 851 * used by kern_memio for /dev/mem access 852 */ 853 ptvmmap = (caddr_t)virtual_start; 854 virtual_start += PAGE_SIZE; 855 856 printf("vmm: Hardware pagetable enabled for guest\n"); 857 } 858 859 860 /* 861 * Map the per-cpu globaldata for cpu #0. Allocate the space using 862 * virtual_start and phys_avail[0] 863 */ 864 static 865 void 866 init_globaldata(void) 867 { 868 int i; 869 vm_paddr_t pa; 870 vm_offset_t va; 871 872 /* 873 * Reserve enough KVA to cover possible cpus. This is a considerable 874 * amount of KVA since the privatespace structure includes two 875 * whole page table mappings. 876 */ 877 virtual_start = (virtual_start + SEG_MASK) & ~(vm_offset_t)SEG_MASK; 878 CPU_prvspace = (void *)virtual_start; 879 virtual_start += sizeof(struct privatespace) * SMP_MAXCPU; 880 881 /* 882 * Allocate enough physical memory to cover the mdglobaldata 883 * portion of the space and the idle stack and map the pages 884 * into KVA. For cpu #0 only. 885 */ 886 for (i = 0; i < sizeof(struct mdglobaldata); i += PAGE_SIZE) { 887 pa = phys_avail[0].phys_beg; 888 va = (vm_offset_t)&CPU_prvspace[0].mdglobaldata + i; 889 pmap_kenter_quick(va, pa); 890 phys_avail[0].phys_beg += PAGE_SIZE; 891 } 892 for (i = 0; i < sizeof(CPU_prvspace[0].idlestack); i += PAGE_SIZE) { 893 pa = phys_avail[0].phys_beg; 894 va = (vm_offset_t)&CPU_prvspace[0].idlestack + i; 895 pmap_kenter_quick(va, pa); 896 phys_avail[0].phys_beg += PAGE_SIZE; 897 } 898 899 /* 900 * Setup the %gs for cpu #0. The mycpu macro works after this 901 * point. Note that %fs is used by pthreads. 902 */ 903 tls_set_gs(&CPU_prvspace[0], sizeof(struct privatespace)); 904 } 905 906 907 /* 908 * Initialize pool tokens and other necessary locks 909 */ 910 static void 911 init_locks(void) 912 { 913 914 /* 915 * Get the initial mplock with a count of 1 for the BSP. 916 * This uses a LOGICAL cpu ID, ie BSP == 0. 917 */ 918 cpu_get_initial_mplock(); 919 920 /* our token pool needs to work early */ 921 lwkt_token_pool_init(); 922 923 } 924 925 926 /* 927 * Initialize very low level systems including thread0, proc0, etc. 928 */ 929 static 930 void 931 init_vkernel(void) 932 { 933 struct mdglobaldata *gd; 934 935 gd = &CPU_prvspace[0].mdglobaldata; 936 bzero(gd, sizeof(*gd)); 937 938 gd->mi.gd_curthread = &thread0; 939 thread0.td_gd = &gd->mi; 940 ncpus = 1; 941 ncpus_fit = 1; /* rounded up power of 2 */ 942 /* ncpus_fit_mask are 0 */ 943 init_param1(); 944 gd->mi.gd_prvspace = &CPU_prvspace[0]; 945 mi_gdinit(&gd->mi, 0); 946 cpu_gdinit(gd, 0); 947 mi_proc0init(&gd->mi, proc0paddr); 948 lwp0.lwp_md.md_regs = &proc0_tf; 949 950 init_locks(); 951 cninit(); 952 rand_initialize(); 953 #if 0 /* #ifdef DDB */ 954 kdb_init(); 955 if (boothowto & RB_KDB) 956 Debugger("Boot flags requested debugger"); 957 #endif 958 identcpu(); 959 #if 0 960 initializecpu(); /* Initialize CPU registers */ 961 #endif 962 init_param2((phys_avail[0].phys_end - 963 phys_avail[0].phys_beg) / PAGE_SIZE); 964 965 #if 0 966 /* 967 * Map the message buffer 968 */ 969 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE) 970 pmap_kenter((vm_offset_t)msgbufp + off, avail_end + off); 971 msgbufinit(msgbufp, MSGBUF_SIZE); 972 #endif 973 #if 0 974 thread0.td_pcb_cr3 ... MMU 975 lwp0.lwp_md.md_regs = &proc0_tf; 976 #endif 977 } 978 979 /* 980 * Filesystem image paths for the virtual kernel are optional. 981 * If specified they each should point to a disk image, 982 * the first of which will become the root disk. 983 * 984 * The virtual kernel caches data from our 'disk' just like a normal kernel, 985 * so we do not really want the real kernel to cache the data too. Use 986 * O_DIRECT to remove the duplication. 987 */ 988 static 989 void 990 init_disk(char **diskExp, int *diskFlags, int diskFileNum, enum vkdisk_type type) 991 { 992 char *serno; 993 int i; 994 995 if (diskFileNum == 0) 996 return; 997 998 for (i=0; i < diskFileNum; i++){ 999 char *fname; 1000 fname = diskExp[i]; 1001 1002 if (fname == NULL) { 1003 warnx("Invalid argument to '-r'"); 1004 continue; 1005 } 1006 /* 1007 * Check for a serial number for the virtual disk 1008 * passed from the command line. 1009 */ 1010 serno = fname; 1011 strsep(&serno, ":"); 1012 1013 if (DiskNum < VKDISK_MAX) { 1014 struct stat st; 1015 struct vkdisk_info *info = NULL; 1016 int fd; 1017 size_t l = 0; 1018 1019 if (type == VKD_DISK) 1020 fd = open(fname, O_RDWR|O_DIRECT, 0644); 1021 else 1022 fd = open(fname, O_RDONLY|O_DIRECT, 0644); 1023 if (fd < 0 || fstat(fd, &st) < 0) { 1024 err(1, "Unable to open/create %s", fname); 1025 /* NOT REACHED */ 1026 } 1027 if (S_ISREG(st.st_mode) && (diskFlags[i] & 1) == 0) { 1028 if (flock(fd, LOCK_EX|LOCK_NB) < 0) { 1029 errx(1, "Disk image %s is already " 1030 "in use\n", fname); 1031 /* NOT REACHED */ 1032 } 1033 } 1034 1035 info = &DiskInfo[DiskNum]; 1036 l = strlen(fname); 1037 1038 info->unit = i; 1039 info->fd = fd; 1040 info->type = type; 1041 info->flags = diskFlags[i]; 1042 memcpy(info->fname, fname, l); 1043 info->serno = NULL; 1044 if (serno) { 1045 if ((info->serno = malloc(SERNOLEN)) != NULL) 1046 strlcpy(info->serno, serno, SERNOLEN); 1047 else 1048 warnx("Couldn't allocate memory for the operation"); 1049 } 1050 1051 if (DiskNum == 0) { 1052 if (type == VKD_CD) { 1053 rootdevnames[0] = "cd9660:vcd0"; 1054 } else if (type == VKD_DISK) { 1055 rootdevnames[0] = "ufs:vkd0s0a"; 1056 rootdevnames[1] = "ufs:vkd0s1a"; 1057 } 1058 } 1059 1060 DiskNum++; 1061 } else { 1062 warnx("vkd%d (%s) > VKDISK_MAX", DiskNum, fname); 1063 continue; 1064 } 1065 } 1066 } 1067 1068 static 1069 int 1070 netif_set_tapflags(int tap_unit, int f, int s) 1071 { 1072 struct ifreq ifr; 1073 int flags; 1074 1075 bzero(&ifr, sizeof(ifr)); 1076 1077 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit); 1078 if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) { 1079 warn("tap%d: ioctl(SIOCGIFFLAGS) failed", tap_unit); 1080 return -1; 1081 } 1082 1083 /* 1084 * Adjust if_flags 1085 * 1086 * If the flags are already set/cleared, then we return 1087 * immediately to avoid extra syscalls 1088 */ 1089 flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16); 1090 if (f < 0) { 1091 /* Turn off flags */ 1092 f = -f; 1093 if ((flags & f) == 0) 1094 return 0; 1095 flags &= ~f; 1096 } else { 1097 /* Turn on flags */ 1098 if (flags & f) 1099 return 0; 1100 flags |= f; 1101 } 1102 1103 /* 1104 * Fix up ifreq.ifr_name, since it may be trashed 1105 * in previous ioctl(SIOCGIFFLAGS) 1106 */ 1107 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit); 1108 1109 ifr.ifr_flags = flags & 0xffff; 1110 ifr.ifr_flagshigh = flags >> 16; 1111 if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) { 1112 warn("tap%d: ioctl(SIOCSIFFLAGS) failed", tap_unit); 1113 return -1; 1114 } 1115 return 0; 1116 } 1117 1118 static 1119 int 1120 netif_set_tapaddr(int tap_unit, in_addr_t addr, in_addr_t mask, int s) 1121 { 1122 struct ifaliasreq ifra; 1123 struct sockaddr_in *in; 1124 1125 bzero(&ifra, sizeof(ifra)); 1126 snprintf(ifra.ifra_name, sizeof(ifra.ifra_name), "tap%d", tap_unit); 1127 1128 /* Setup address */ 1129 in = (struct sockaddr_in *)&ifra.ifra_addr; 1130 in->sin_family = AF_INET; 1131 in->sin_len = sizeof(*in); 1132 in->sin_addr.s_addr = addr; 1133 1134 if (mask != 0) { 1135 /* Setup netmask */ 1136 in = (struct sockaddr_in *)&ifra.ifra_mask; 1137 in->sin_len = sizeof(*in); 1138 in->sin_addr.s_addr = mask; 1139 } 1140 1141 if (ioctl(s, SIOCAIFADDR, &ifra) < 0) { 1142 warn("tap%d: ioctl(SIOCAIFADDR) failed", tap_unit); 1143 return -1; 1144 } 1145 return 0; 1146 } 1147 1148 static 1149 int 1150 netif_add_tap2brg(int tap_unit, const char *ifbridge, int s) 1151 { 1152 struct ifbreq ifbr; 1153 struct ifdrv ifd; 1154 1155 bzero(&ifbr, sizeof(ifbr)); 1156 snprintf(ifbr.ifbr_ifsname, sizeof(ifbr.ifbr_ifsname), 1157 "tap%d", tap_unit); 1158 1159 bzero(&ifd, sizeof(ifd)); 1160 strlcpy(ifd.ifd_name, ifbridge, sizeof(ifd.ifd_name)); 1161 ifd.ifd_cmd = BRDGADD; 1162 ifd.ifd_len = sizeof(ifbr); 1163 ifd.ifd_data = &ifbr; 1164 1165 if (ioctl(s, SIOCSDRVSPEC, &ifd) < 0) { 1166 /* 1167 * 'errno == EEXIST' means that the tap(4) is already 1168 * a member of the bridge(4) 1169 */ 1170 if (errno != EEXIST) { 1171 warn("ioctl(%s, SIOCSDRVSPEC) failed", ifbridge); 1172 return -1; 1173 } 1174 } 1175 return 0; 1176 } 1177 1178 #define TAPDEV_OFLAGS (O_RDWR | O_NONBLOCK) 1179 1180 /* 1181 * Locate the first unused tap(4) device file if auto mode is requested, 1182 * or open the user supplied device file, and bring up the corresponding 1183 * tap(4) interface. 1184 * 1185 * NOTE: Only tap(4) device file is supported currently 1186 */ 1187 static 1188 int 1189 netif_open_tap(const char *netif, int *tap_unit, int s) 1190 { 1191 char tap_dev[MAXPATHLEN]; 1192 int tap_fd, failed; 1193 struct stat st; 1194 char *dname; 1195 1196 *tap_unit = -1; 1197 1198 if (strcmp(netif, "auto") == 0) { 1199 /* 1200 * Find first unused tap(4) device file 1201 */ 1202 tap_fd = open("/dev/tap", TAPDEV_OFLAGS); 1203 if (tap_fd < 0) { 1204 warnc(errno, "Unable to find a free tap(4)"); 1205 return -1; 1206 } 1207 } else { 1208 /* 1209 * User supplied tap(4) device file or unix socket. 1210 */ 1211 if (netif[0] == '/') /* Absolute path */ 1212 strlcpy(tap_dev, netif, sizeof(tap_dev)); 1213 else 1214 snprintf(tap_dev, sizeof(tap_dev), "/dev/%s", netif); 1215 1216 tap_fd = open(tap_dev, TAPDEV_OFLAGS); 1217 1218 /* 1219 * If we cannot open normally try to connect to it. 1220 */ 1221 if (tap_fd < 0) 1222 tap_fd = unix_connect(tap_dev); 1223 1224 if (tap_fd < 0) { 1225 warn("Unable to open %s", tap_dev); 1226 return -1; 1227 } 1228 } 1229 1230 /* 1231 * Check whether the device file is a tap(4) 1232 */ 1233 if (fstat(tap_fd, &st) < 0) { 1234 failed = 1; 1235 } else if (S_ISCHR(st.st_mode)) { 1236 dname = fdevname(tap_fd); 1237 if (dname) 1238 dname = strstr(dname, "tap"); 1239 if (dname) { 1240 /* 1241 * Bring up the corresponding tap(4) interface 1242 */ 1243 *tap_unit = strtol(dname + 3, NULL, 10); 1244 printf("TAP UNIT %d\n", *tap_unit); 1245 if (netif_set_tapflags(*tap_unit, IFF_UP, s) == 0) 1246 failed = 0; 1247 else 1248 failed = 1; 1249 } else { 1250 failed = 1; 1251 } 1252 } else if (S_ISSOCK(st.st_mode)) { 1253 /* 1254 * Special socket connection (typically to vknet). We 1255 * do not have to do anything. 1256 */ 1257 failed = 0; 1258 } else { 1259 failed = 1; 1260 } 1261 1262 if (failed) { 1263 warnx("%s is not a tap(4) device or socket", tap_dev); 1264 close(tap_fd); 1265 tap_fd = -1; 1266 *tap_unit = -1; 1267 } 1268 return tap_fd; 1269 } 1270 1271 static int 1272 unix_connect(const char *path) 1273 { 1274 struct sockaddr_un sunx; 1275 int len; 1276 int net_fd; 1277 int sndbuf = 262144; 1278 struct stat st; 1279 1280 snprintf(sunx.sun_path, sizeof(sunx.sun_path), "%s", path); 1281 len = offsetof(struct sockaddr_un, sun_path[strlen(sunx.sun_path)]); 1282 ++len; /* include nul */ 1283 sunx.sun_family = AF_UNIX; 1284 sunx.sun_len = len; 1285 1286 net_fd = socket(AF_UNIX, SOCK_SEQPACKET, 0); 1287 if (net_fd < 0) 1288 return(-1); 1289 if (connect(net_fd, (void *)&sunx, len) < 0) { 1290 close(net_fd); 1291 return(-1); 1292 } 1293 setsockopt(net_fd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(sndbuf)); 1294 if (fstat(net_fd, &st) == 0) 1295 printf("Network socket buffer: %ld bytes\n", st.st_blksize); 1296 fcntl(net_fd, F_SETFL, O_NONBLOCK); 1297 return(net_fd); 1298 } 1299 1300 #undef TAPDEV_MAJOR 1301 #undef TAPDEV_MINOR 1302 #undef TAPDEV_OFLAGS 1303 1304 /* 1305 * Following syntax is supported, 1306 * 1) x.x.x.x tap(4)'s address is x.x.x.x 1307 * 1308 * 2) x.x.x.x/z tap(4)'s address is x.x.x.x 1309 * tap(4)'s netmask len is z 1310 * 1311 * 3) x.x.x.x:y.y.y.y tap(4)'s address is x.x.x.x 1312 * pseudo netif's address is y.y.y.y 1313 * 1314 * 4) x.x.x.x:y.y.y.y/z tap(4)'s address is x.x.x.x 1315 * pseudo netif's address is y.y.y.y 1316 * tap(4) and pseudo netif's netmask len are z 1317 * 1318 * 5) bridgeX tap(4) will be added to bridgeX 1319 * 1320 * 6) bridgeX:y.y.y.y tap(4) will be added to bridgeX 1321 * pseudo netif's address is y.y.y.y 1322 * 1323 * 7) bridgeX:y.y.y.y/z tap(4) will be added to bridgeX 1324 * pseudo netif's address is y.y.y.y 1325 * pseudo netif's netmask len is z 1326 */ 1327 static 1328 int 1329 netif_init_tap(int tap_unit, in_addr_t *addr, in_addr_t *mask, int s) 1330 { 1331 in_addr_t tap_addr, netmask, netif_addr; 1332 int next_netif_addr; 1333 char *tok, *masklen_str, *ifbridge; 1334 1335 *addr = 0; 1336 *mask = 0; 1337 1338 tok = strtok(NULL, ":/"); 1339 if (tok == NULL) { 1340 /* 1341 * Nothing special, simply use tap(4) as backend 1342 */ 1343 return 0; 1344 } 1345 1346 if (inet_pton(AF_INET, tok, &tap_addr) > 0) { 1347 /* 1348 * tap(4)'s address is supplied 1349 */ 1350 ifbridge = NULL; 1351 1352 /* 1353 * If there is next token, then it may be pseudo 1354 * netif's address or netmask len for tap(4) 1355 */ 1356 next_netif_addr = 0; 1357 } else { 1358 /* 1359 * Not tap(4)'s address, assume it as a bridge(4) 1360 * iface name 1361 */ 1362 tap_addr = 0; 1363 ifbridge = tok; 1364 1365 /* 1366 * If there is next token, then it must be pseudo 1367 * netif's address 1368 */ 1369 next_netif_addr = 1; 1370 } 1371 1372 netmask = netif_addr = 0; 1373 1374 tok = strtok(NULL, ":/"); 1375 if (tok == NULL) 1376 goto back; 1377 1378 if (inet_pton(AF_INET, tok, &netif_addr) <= 0) { 1379 if (next_netif_addr) { 1380 warnx("Invalid pseudo netif address: %s", tok); 1381 return -1; 1382 } 1383 netif_addr = 0; 1384 1385 /* 1386 * Current token is not address, then it must be netmask len 1387 */ 1388 masklen_str = tok; 1389 } else { 1390 /* 1391 * Current token is pseudo netif address, if there is next token 1392 * it must be netmask len 1393 */ 1394 masklen_str = strtok(NULL, "/"); 1395 } 1396 1397 /* Calculate netmask */ 1398 if (masklen_str != NULL) { 1399 u_long masklen; 1400 1401 masklen = strtoul(masklen_str, NULL, 10); 1402 if (masklen < 32 && masklen > 0) { 1403 netmask = 1404 htonl(rounddown2(0xffffffff, 1LL << (32 - masklen))); 1405 } else { 1406 warnx("Invalid netmask len: %lu", masklen); 1407 return -1; 1408 } 1409 } 1410 1411 /* Make sure there is no more token left */ 1412 if (strtok(NULL, ":/") != NULL) { 1413 warnx("Invalid argument to '-I'"); 1414 return -1; 1415 } 1416 1417 back: 1418 if (tap_unit < 0) { 1419 /* Do nothing */ 1420 } else if (ifbridge == NULL) { 1421 /* Set tap(4) address/netmask */ 1422 if (netif_set_tapaddr(tap_unit, tap_addr, netmask, s) < 0) 1423 return -1; 1424 } else { 1425 /* Tie tap(4) to bridge(4) */ 1426 if (netif_add_tap2brg(tap_unit, ifbridge, s) < 0) 1427 return -1; 1428 } 1429 1430 *addr = netif_addr; 1431 *mask = netmask; 1432 return 0; 1433 } 1434 1435 /* 1436 * NetifInfo[] will be filled for pseudo netif initialization. 1437 * NetifNum will be bumped to reflect the number of valid entries 1438 * in NetifInfo[]. 1439 */ 1440 static 1441 void 1442 init_netif(char *netifExp[], int netifExpNum) 1443 { 1444 int i, s; 1445 char *tmp; 1446 1447 if (netifExpNum == 0) 1448 return; 1449 1450 s = socket(AF_INET, SOCK_DGRAM, 0); /* for ioctl(SIOC) */ 1451 if (s < 0) 1452 return; 1453 1454 for (i = 0; i < netifExpNum; ++i) { 1455 struct vknetif_info *info; 1456 in_addr_t netif_addr, netif_mask; 1457 int tap_fd, tap_unit; 1458 char *netif; 1459 1460 /* Extract MAC address if there is one */ 1461 tmp = netifExp[i]; 1462 strsep(&tmp, "="); 1463 1464 netif = strtok(netifExp[i], ":"); 1465 if (netif == NULL) { 1466 warnx("Invalid argument to '-I'"); 1467 continue; 1468 } 1469 1470 /* 1471 * Open tap(4) device file and bring up the 1472 * corresponding interface 1473 */ 1474 tap_fd = netif_open_tap(netif, &tap_unit, s); 1475 if (tap_fd < 0) 1476 continue; 1477 1478 /* 1479 * Initialize tap(4) and get address/netmask 1480 * for pseudo netif 1481 * 1482 * NB: Rest part of netifExp[i] is passed 1483 * to netif_init_tap() implicitly. 1484 */ 1485 if (netif_init_tap(tap_unit, &netif_addr, &netif_mask, s) < 0) { 1486 /* 1487 * NB: Closing tap(4) device file will bring 1488 * down the corresponding interface 1489 */ 1490 close(tap_fd); 1491 continue; 1492 } 1493 1494 info = &NetifInfo[NetifNum]; 1495 bzero(info, sizeof(*info)); 1496 info->tap_fd = tap_fd; 1497 info->tap_unit = tap_unit; 1498 info->netif_addr = netif_addr; 1499 info->netif_mask = netif_mask; 1500 /* 1501 * If tmp isn't NULL it means a MAC could have been 1502 * specified so attempt to convert it. 1503 * Setting enaddr to NULL will tell vke_attach() we 1504 * need a pseudo-random MAC address. 1505 */ 1506 if (tmp != NULL) { 1507 if ((info->enaddr = malloc(ETHER_ADDR_LEN)) == NULL) 1508 warnx("Couldn't allocate memory for the operation"); 1509 else { 1510 if ((kether_aton(tmp, info->enaddr)) == NULL) { 1511 free(info->enaddr); 1512 info->enaddr = NULL; 1513 } 1514 } 1515 } 1516 1517 NetifNum++; 1518 if (NetifNum >= VKNETIF_MAX) /* XXX will this happen? */ 1519 break; 1520 } 1521 close(s); 1522 } 1523 1524 /* 1525 * Create the pid file and leave it open and locked while the vkernel is 1526 * running. This allows a script to use /usr/bin/lockf to probe whether 1527 * a vkernel is still running (so as not to accidently kill an unrelated 1528 * process from a stale pid file). 1529 */ 1530 static 1531 void 1532 writepid(void) 1533 { 1534 char buf[32]; 1535 int fd; 1536 1537 if (pid_file != NULL) { 1538 snprintf(buf, sizeof(buf), "%ld\n", (long)getpid()); 1539 fd = open(pid_file, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0666); 1540 if (fd < 0) { 1541 if (errno == EWOULDBLOCK) { 1542 perror("Failed to lock pidfile, " 1543 "vkernel already running"); 1544 } else { 1545 perror("Failed to create pidfile"); 1546 } 1547 exit(EX_SOFTWARE); 1548 } 1549 ftruncate(fd, 0); 1550 write(fd, buf, strlen(buf)); 1551 /* leave the file open to maintain the lock */ 1552 } 1553 } 1554 1555 static 1556 void 1557 cleanpid( void ) 1558 { 1559 if (pid_file != NULL) { 1560 if (unlink(pid_file) < 0) 1561 perror("Warning: couldn't remove pidfile"); 1562 } 1563 } 1564 1565 static 1566 void 1567 usage_err(const char *ctl, ...) 1568 { 1569 va_list va; 1570 1571 va_start(va, ctl); 1572 vfprintf(stderr, ctl, va); 1573 va_end(va); 1574 fprintf(stderr, "\n"); 1575 exit(EX_USAGE); 1576 } 1577 1578 static 1579 void 1580 usage_help(_Bool help) 1581 { 1582 fprintf(stderr, "Usage: %s [-hsUvdt] [-c file] [-e name=value:name=value:...]\n" 1583 "\t[-i file] [-I interface[:address1[:address2][/netmask]]] [-l cpulock]\n" 1584 "\t[-m size] [-n numcpus[:lbits[:cbits]]]\n" 1585 "\t[-p file] [-r file]\n", save_av[0]); 1586 1587 if (help) 1588 fprintf(stderr, "\nArguments:\n" 1589 "\t-c\tSpecify a readonly CD-ROM image file to be used by the kernel.\n" 1590 "\t-e\tSpecify an environment to be used by the kernel.\n" 1591 "\t-h\tThis list of options.\n" 1592 "\t-i\tSpecify a memory image file to be used by the virtual kernel.\n" 1593 "\t-I\tCreate a virtual network device.\n" 1594 "\t-l\tSpecify which, if any, real CPUs to lock virtual CPUs to.\n" 1595 "\t-m\tSpecify the amount of memory to be used by the kernel in bytes.\n" 1596 "\t-n\tSpecify the number of CPUs and the topology you wish to emulate:\n" 1597 "\t\t\tnumcpus - number of cpus\n" 1598 "\t\t\tlbits - specify the number of bits within APICID(=CPUID)\n" 1599 "\t\t\t needed for representing the logical ID.\n" 1600 "\t\t\t Controls the number of threads/core:\n" 1601 "\t\t\t (0 bits - 1 thread, 1 bit - 2 threads).\n" 1602 "\t\t\tcbits - specify the number of bits within APICID(=CPUID)\n" 1603 "\t\t\t needed for representing the core ID.\n" 1604 "\t\t\t Controls the number of cores/package:\n" 1605 "\t\t\t (0 bits - 1 core, 1 bit - 2 cores).\n" 1606 "\t-p\tSpecify a file in which to store the process ID.\n" 1607 "\t-r\tSpecify a R/W disk image file, iterates vkd0..n\n" 1608 "\t-R\tSpecify a COW disk image file, iterates vkd0..n\n" 1609 "\t-s\tBoot into single-user mode.\n" 1610 "\t-t\tUse a precise host timer when calculating clock values.\n" 1611 "\t-U\tEnable writing to kernel memory and module loading.\n" 1612 "\t-v\tTurn on verbose booting.\n"); 1613 1614 exit(EX_USAGE); 1615 } 1616 1617 void 1618 cpu_smp_stopped(void) 1619 { 1620 } 1621 1622 void 1623 cpu_reset(void) 1624 { 1625 kprintf("cpu reset, rebooting vkernel\n"); 1626 closefrom(3); 1627 cleanpid(); 1628 exit(EX_VKERNEL_REBOOT); 1629 } 1630 1631 void 1632 cpu_halt(void) 1633 { 1634 kprintf("cpu halt, exiting vkernel\n"); 1635 cleanpid(); 1636 exit(EX_OK); 1637 } 1638 1639 void 1640 setrealcpu(void) 1641 { 1642 switch(lwp_cpu_lock) { 1643 case LCL_PER_CPU: 1644 if (bootverbose) 1645 kprintf("Locking CPU%d to real cpu %d\n", 1646 mycpuid, next_cpu); 1647 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu)); 1648 next_cpu++; 1649 if (next_cpu >= real_ncpus) 1650 next_cpu = 0; 1651 break; 1652 case LCL_SINGLE_CPU: 1653 if (bootverbose) 1654 kprintf("Locking CPU%d to real cpu %d\n", 1655 mycpuid, next_cpu); 1656 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu)); 1657 break; 1658 default: 1659 /* do not map virtual cpus to real cpus */ 1660 break; 1661 } 1662 } 1663 1664 /* 1665 * Allocate and free memory for module loading. The loaded module 1666 * has to be placed somewhere near the current kernel binary load 1667 * point or the relocations will not work. 1668 * 1669 * I'm not sure why this isn't working. 1670 */ 1671 int 1672 vkernel_module_memory_alloc(vm_offset_t *basep, size_t bytes) 1673 { 1674 #if 1 1675 size_t xtra; 1676 xtra = (PAGE_SIZE - (vm_offset_t)sbrk(0)) & PAGE_MASK; 1677 *basep = (vm_offset_t)sbrk(xtra + bytes) + xtra; 1678 bzero((void *)*basep, bytes); 1679 #else 1680 *basep = (vm_offset_t)mmap((void *)0x000000000, bytes, 1681 PROT_READ|PROT_WRITE|PROT_EXEC, 1682 MAP_ANON|MAP_SHARED, -1, 0); 1683 if ((void *)*basep == MAP_FAILED) 1684 return ENOMEM; 1685 #endif 1686 return 0; 1687 } 1688 1689 void 1690 vkernel_module_memory_free(vm_offset_t base, size_t bytes) 1691 { 1692 #if 0 1693 #if 0 1694 munmap((void *)base, bytes); 1695 #endif 1696 #endif 1697 } 1698 1699 /* 1700 * VKERNEL64 implementation functions using ptrheads. 1701 */ 1702 void 1703 vkernel_yield(void) 1704 { 1705 pthread_yield(); 1706 } 1707