2 * Copyright (c) 2006 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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
34 * $DragonFly: src/sys/platform/vkernel/platform/init.c,v 1.34 2007/04/11 21:04:09 dillon Exp $
37 #include <sys/types.h>
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
43 #include <sys/random.h>
44 #include <sys/vkernel.h>
46 #include <sys/reboot.h>
48 #include <sys/msgbuf.h>
49 #include <sys/vmspace.h>
50 #include <sys/socket.h>
51 #include <sys/sockio.h>
52 #include <vm/vm_page.h>
54 #include <machine/globaldata.h>
55 #include <machine/tls.h>
56 #include <machine/md_var.h>
57 #include <machine/vmparam.h>
60 #include <net/if_arp.h>
61 #include <net/ethernet.h>
62 #include <net/bridge/if_bridgevar.h>
63 #include <netinet/in.h>
64 #include <arpa/inet.h>
75 vm_paddr_t phys_avail[16];
77 vm_paddr_t Maxmem_bytes;
79 struct vkdisk_info DiskInfo[VKDISK_MAX];
81 struct vknetif_info NetifInfo[VKNETIF_MAX];
86 vm_offset_t virtual_start;
87 vm_offset_t virtual_end;
88 vm_offset_t kernel_vm_end;
89 vm_offset_t crashdumpmap;
90 vm_offset_t clean_sva;
91 vm_offset_t clean_eva;
92 struct msgbuf *msgbufp;
95 vpte_t *KernelPTA; /* Warning: Offset for direct VA translation */
96 u_int cpu_feature; /* XXX */
97 u_int tsc_present; /* XXX */
99 struct privatespace *CPU_prvspace;
101 static struct trapframe proc0_tf;
102 static void *proc0paddr;
104 static void init_sys_memory(char *imageFile);
105 static void init_kern_memory(void);
106 static void init_globaldata(void);
107 static void init_vkernel(void);
108 static void init_disk(char *diskExp[], int diskFileNum);
109 static void init_netif(char *netifExp[], int netifFileNum);
110 static void usage(const char *ctl);
113 * Kernel startup for virtual kernels - standard main()
116 main(int ac, char **av)
118 char *memImageFile = NULL;
119 char *netifFile[VKNETIF_MAX];
120 char *diskFile[VKDISK_MAX];
122 int netifFileNum = 0;
131 kernel_mem_readonly = 1;
133 while ((c = getopt(ac, av, "svm:r:e:i:I:U")) != -1) {
137 * name=value:name=value:name=value...
140 kern_envp = malloc(n + 2);
141 for (i = 0; i < n; ++i) {
142 if (optarg[i] == ':')
145 kern_envp[i] = optarg[i];
151 boothowto |= RB_SINGLE;
157 memImageFile = optarg;
160 if (netifFileNum < VKNETIF_MAX)
161 netifFile[netifFileNum++] = optarg;
164 if (diskFileNum < VKDISK_MAX)
165 diskFile[diskFileNum++] = optarg;
168 Maxmem_bytes = strtoull(optarg, &suffix, 0);
185 usage("Bad maxmem option");
192 kernel_mem_readonly = 0;
198 init_sys_memory(memImageFile);
203 init_disk(diskFile, diskFileNum);
204 init_netif(netifFile, netifFileNum);
212 * Initialize system memory. This is the virtual kernel's 'RAM'.
216 init_sys_memory(char *imageFile)
223 * Figure out the system memory image size. If an image file was
224 * specified and -m was not specified, use the image file's size.
227 if (imageFile && stat(imageFile, &st) == 0 && Maxmem_bytes == 0)
228 Maxmem_bytes = (vm_paddr_t)st.st_size;
229 if ((imageFile == NULL || stat(imageFile, &st) < 0) &&
231 err(1, "Cannot create new memory file %s unless "
232 "system memory size is specified with -m",
238 * Maxmem must be known at this time
240 if (Maxmem_bytes < 32 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) {
241 err(1, "Bad maxmem specification: 32MB minimum, "
242 "multiples of %dMB only",
243 SEG_SIZE / 1024 / 1024);
248 * Generate an image file name if necessary, then open/create the
249 * file exclusively locked. Do not allow multiple virtual kernels
250 * to use the same image file.
252 if (imageFile == NULL) {
253 for (i = 0; i < 1000000; ++i) {
254 asprintf(&imageFile, "/var/vkernel/memimg.%06d", i);
256 O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644);
257 if (fd < 0 && errno == EWOULDBLOCK) {
264 fd = open(imageFile, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644);
266 printf("Using memory file: %s\n", imageFile);
267 if (fd < 0 || fstat(fd, &st) < 0) {
268 err(1, "Unable to open/create %s", imageFile);
273 * Truncate or extend the file as necessary.
275 if (st.st_size > Maxmem_bytes) {
276 ftruncate(fd, Maxmem_bytes);
277 } else if (st.st_size < Maxmem_bytes) {
279 off_t off = st.st_size & ~SEG_MASK;
281 kprintf("%s: Reserving blocks for memory image\n", imageFile);
282 zmem = malloc(SEG_SIZE);
283 bzero(zmem, SEG_SIZE);
284 lseek(fd, off, SEEK_SET);
285 while (off < Maxmem_bytes) {
286 if (write(fd, zmem, SEG_SIZE) != SEG_SIZE) {
287 err(1, "Unable to reserve blocks for memory image");
293 err(1, "Unable to reserve blocks for memory image");
297 Maxmem = Maxmem_bytes >> PAGE_SHIFT;
301 * Initialize kernel memory. This reserves kernel virtual memory by using
307 init_kern_memory(void)
313 char *topofstack = &dummy;
318 * Memory map our kernel virtual memory space. Note that the
319 * kernel image itself is not made part of this memory for the
322 * The memory map must be segment-aligned so we can properly
325 * If the system kernel has a different MAXDSIZ, it might not
326 * be possible to map kernel memory in its prefered location.
327 * Try a number of different locations.
329 try = (void *)0x40000000;
331 while ((char *)try + KERNEL_KVA_SIZE < topofstack) {
332 base = mmap(try, KERNEL_KVA_SIZE, PROT_READ|PROT_WRITE,
333 MAP_FILE|MAP_SHARED|MAP_VPAGETABLE,
337 if (base != MAP_FAILED)
338 munmap(base, KERNEL_KVA_SIZE);
339 try = (char *)try + 0x10000000;
342 err(1, "Unable to mmap() kernel virtual memory!");
345 madvise(base, KERNEL_KVA_SIZE, MADV_NOSYNC);
346 KvaStart = (vm_offset_t)base;
347 KvaSize = KERNEL_KVA_SIZE;
348 KvaEnd = KvaStart + KvaSize;
349 printf("KVM mapped at %p-%p\n", (void *)KvaStart, (void *)KvaEnd);
352 * Create a top-level page table self-mapping itself.
354 * Initialize the page directory at physical page index 0 to point
355 * to an array of page table pages starting at physical page index 1
357 lseek(MemImageFd, 0L, 0);
358 for (i = 0; i < KERNEL_KVA_SIZE / SEG_SIZE; ++i) {
359 pte = ((i + 1) * PAGE_SIZE) | VPTE_V | VPTE_R | VPTE_W;
360 write(MemImageFd, &pte, sizeof(pte));
364 * Initialize the PTEs in the page table pages required to map the
365 * page table itself. This includes mapping the page directory page
366 * at the base so we go one more loop then normal.
368 lseek(MemImageFd, PAGE_SIZE, 0);
369 for (i = 0; i <= KERNEL_KVA_SIZE / SEG_SIZE * sizeof(vpte_t); ++i) {
370 pte = (i * PAGE_SIZE) | VPTE_V | VPTE_R | VPTE_W;
371 write(MemImageFd, &pte, sizeof(pte));
375 * Initialize remaining PTEs to 0. We may be reusing a memory image
376 * file. This is approximately a megabyte.
378 i = (KERNEL_KVA_SIZE / PAGE_SIZE - i) * sizeof(pte);
379 zero = malloc(PAGE_SIZE);
380 bzero(zero, PAGE_SIZE);
382 write(MemImageFd, zero, (i > PAGE_SIZE) ? PAGE_SIZE : i);
383 i = i - ((i > PAGE_SIZE) ? PAGE_SIZE : i);
388 * Enable the page table and calculate pointers to our self-map
389 * for easy kernel page table manipulation.
391 * KernelPTA must be offset so we can do direct VA translations
393 mcontrol(base, KERNEL_KVA_SIZE, MADV_SETMAP,
394 0 | VPTE_R | VPTE_W | VPTE_V);
395 KernelPTD = (vpte_t *)base; /* pg directory */
396 KernelPTA = (vpte_t *)((char *)base + PAGE_SIZE); /* pg table pages */
397 KernelPTA -= KvaStart >> PAGE_SHIFT;
400 * phys_avail[] represents unallocated physical memory. MI code
401 * will use phys_avail[] to create the vm_page array.
403 phys_avail[0] = PAGE_SIZE +
404 KERNEL_KVA_SIZE / PAGE_SIZE * sizeof(vpte_t);
405 phys_avail[0] = (phys_avail[0] + PAGE_MASK) & ~(vm_paddr_t)PAGE_MASK;
406 phys_avail[1] = Maxmem_bytes;
409 * (virtual_start, virtual_end) represent unallocated kernel virtual
410 * memory. MI code will create kernel_map using these parameters.
412 virtual_start = KvaStart + PAGE_SIZE +
413 KERNEL_KVA_SIZE / PAGE_SIZE * sizeof(vpte_t);
414 virtual_start = (virtual_start + PAGE_MASK) & ~(vm_offset_t)PAGE_MASK;
415 virtual_end = KvaStart + KERNEL_KVA_SIZE;
418 * kernel_vm_end could be set to virtual_end but we want some
419 * indication of how much of the kernel_map we've used, so
420 * set it low and let pmap_growkernel increase it even though we
421 * don't need to create any new page table pages.
423 kernel_vm_end = virtual_start;
426 * Allocate space for process 0's UAREA.
428 proc0paddr = (void *)virtual_start;
429 for (i = 0; i < UPAGES; ++i) {
430 pmap_kenter_quick(virtual_start, phys_avail[0]);
431 virtual_start += PAGE_SIZE;
432 phys_avail[0] += PAGE_SIZE;
438 crashdumpmap = virtual_start;
439 virtual_start += MAXDUMPPGS * PAGE_SIZE;
442 * msgbufp maps the system message buffer
444 assert((MSGBUF_SIZE & PAGE_MASK) == 0);
445 msgbufp = (void *)virtual_start;
446 for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) {
447 pmap_kenter_quick(virtual_start, phys_avail[0]);
448 virtual_start += PAGE_SIZE;
449 phys_avail[0] += PAGE_SIZE;
451 msgbufinit(msgbufp, MSGBUF_SIZE);
454 * used by kern_memio for /dev/mem access
456 ptvmmap = (caddr_t)virtual_start;
457 virtual_start += PAGE_SIZE;
460 * Bootstrap the kernel_pmap
466 * Map the per-cpu globaldata for cpu #0. Allocate the space using
467 * virtual_start and phys_avail[0]
471 init_globaldata(void)
478 * Reserve enough KVA to cover possible cpus. This is a considerable
479 * amount of KVA since the privatespace structure includes two
480 * whole page table mappings.
482 virtual_start = (virtual_start + SEG_MASK) & ~(vm_offset_t)SEG_MASK;
483 CPU_prvspace = (void *)virtual_start;
484 virtual_start += sizeof(struct privatespace) * SMP_MAXCPU;
487 * Allocate enough physical memory to cover the mdglobaldata
488 * portion of the space and the idle stack and map the pages
489 * into KVA. For cpu #0 only.
491 for (i = 0; i < sizeof(struct mdglobaldata); i += PAGE_SIZE) {
493 va = (vm_offset_t)&CPU_prvspace[0].mdglobaldata + i;
494 pmap_kenter_quick(va, pa);
495 phys_avail[0] += PAGE_SIZE;
497 for (i = 0; i < sizeof(CPU_prvspace[0].idlestack); i += PAGE_SIZE) {
499 va = (vm_offset_t)&CPU_prvspace[0].idlestack + i;
500 pmap_kenter_quick(va, pa);
501 phys_avail[0] += PAGE_SIZE;
505 * Setup the %gs for cpu #0. The mycpu macro works after this
508 tls_set_fs(&CPU_prvspace[0], sizeof(struct privatespace));
512 * Initialize very low level systems including thread0, proc0, etc.
518 struct mdglobaldata *gd;
520 gd = &CPU_prvspace[0].mdglobaldata;
521 bzero(gd, sizeof(*gd));
523 gd->mi.gd_curthread = &thread0;
524 thread0.td_gd = &gd->mi;
528 gd->mi.gd_prvspace = &CPU_prvspace[0];
529 mi_gdinit(&gd->mi, 0);
531 mi_proc0init(&gd->mi, proc0paddr);
532 lwp0.lwp_md.md_regs = &proc0_tf;
537 #if 0 /* #ifdef DDB */
539 if (boothowto & RB_KDB)
540 Debugger("Boot flags requested debugger");
543 initializecpu(); /* Initialize CPU registers */
545 init_param2((phys_avail[1] - phys_avail[0]) / PAGE_SIZE);
549 * Map the message buffer
551 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE)
552 pmap_kenter((vm_offset_t)msgbufp + off, avail_end + off);
553 msgbufinit(msgbufp, MSGBUF_SIZE);
556 thread0.td_pcb_cr3 ... MMU
557 lwp0.lwp_md.md_regs = &proc0_tf;
562 * Filesystem image paths for the virtual kernel are optional.
563 * If specified they each should point to a disk image,
564 * the first of which will become the root disk.
566 * The virtual kernel caches data from our 'disk' just like a normal kernel,
567 * so we do not really want the real kernel to cache the data too. Use
568 * O_DIRECT to remove the duplication.
572 init_disk(char *diskExp[], int diskFileNum)
576 if (diskFileNum == 0)
579 for(i=0; i < diskFileNum; i++){
584 warnx("Invalid argument to '-r'");
588 if (DiskNum < VKDISK_MAX) {
590 struct vkdisk_info* info = NULL;
594 fd = open(fname, O_RDWR|O_DIRECT, 0644);
595 if (fd < 0 || fstat(fd, &st) < 0) {
596 err(1, "Unable to open/create %s", fname);
600 info = &DiskInfo[DiskNum];
605 memcpy(info->fname, fname, l);
608 rootdevnames[0] = "ufs:vkd0a";
612 warnx("vkd%d (%s) > VKDISK_MAX", DiskNum, fname);
620 netif_set_tapflags(int tap_unit, int f, int s)
625 bzero(&ifr, sizeof(ifr));
627 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit);
628 if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) {
629 warn("tap%d: ioctl(SIOCGIFFLAGS) failed", tap_unit);
636 * If the flags are already set/cleared, then we return
637 * immediately to avoid extra syscalls
639 flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16);
643 if ((flags & f) == 0)
654 * Fix up ifreq.ifr_name, since it may be trashed
655 * in previous ioctl(SIOCGIFFLAGS)
657 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit);
659 ifr.ifr_flags = flags & 0xffff;
660 ifr.ifr_flagshigh = flags >> 16;
661 if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) {
662 warn("tap%d: ioctl(SIOCSIFFLAGS) failed", tap_unit);
670 netif_set_tapaddr(int tap_unit, in_addr_t addr, in_addr_t mask, int s)
672 struct ifaliasreq ifra;
673 struct sockaddr_in *in;
675 bzero(&ifra, sizeof(ifra));
676 snprintf(ifra.ifra_name, sizeof(ifra.ifra_name), "tap%d", tap_unit);
679 in = (struct sockaddr_in *)&ifra.ifra_addr;
680 in->sin_family = AF_INET;
681 in->sin_len = sizeof(*in);
682 in->sin_addr.s_addr = addr;
686 in = (struct sockaddr_in *)&ifra.ifra_mask;
687 in->sin_len = sizeof(*in);
688 in->sin_addr.s_addr = mask;
691 if (ioctl(s, SIOCAIFADDR, &ifra) < 0) {
692 warn("tap%d: ioctl(SIOCAIFADDR) failed", tap_unit);
700 netif_add_tap2brg(int tap_unit, const char *ifbridge, int s)
705 bzero(&ifbr, sizeof(ifbr));
706 snprintf(ifbr.ifbr_ifsname, sizeof(ifbr.ifbr_ifsname),
709 bzero(&ifd, sizeof(ifd));
710 strlcpy(ifd.ifd_name, ifbridge, sizeof(ifd.ifd_name));
711 ifd.ifd_cmd = BRDGADD;
712 ifd.ifd_len = sizeof(ifbr);
713 ifd.ifd_data = &ifbr;
715 if (ioctl(s, SIOCSDRVSPEC, &ifd) < 0) {
717 * 'errno == EEXIST' means that the tap(4) is already
718 * a member of the bridge(4)
720 if (errno != EEXIST) {
721 warn("ioctl(%s, SIOCSDRVSPEC) failed", ifbridge);
728 #define TAPDEV_OFLAGS (O_RDWR | O_NONBLOCK)
730 /* XXX major()/minor() can't be used in vkernel */
731 #define TAPDEV_MAJOR(x) ((int)(((u_int)(x) >> 8) & 0xff))
732 #define TAPDEV_MINOR(x) ((int)((x) & 0xffff00ff))
734 #ifndef TAP_CDEV_MAJOR
735 #define TAP_CDEV_MAJOR 149
739 * Locate the first unused tap(4) device file if auto mode is requested,
740 * or open the user supplied device file, and bring up the corresponding
743 * NOTE: Only tap(4) device file is supported currently
747 netif_open_tap(const char *netif, int *tap_unit, int s)
749 char tap_dev[MAXPATHLEN];
755 if (strcmp(netif, "auto") == 0) {
759 * Find first unused tap(4) device file
762 snprintf(tap_dev, sizeof(tap_dev), "/dev/tap%d", i);
763 tap_fd = open(tap_dev, TAPDEV_OFLAGS);
764 if (tap_fd >= 0 || errno == ENOENT)
768 warnx("Unable to find a free tap(4)");
773 * User supplied tap(4) device file
775 if (netif[0] == '/') /* Absolute path */
776 strlcpy(tap_dev, netif, sizeof(tap_dev));
778 snprintf(tap_dev, sizeof(tap_dev), "/dev/%s", netif);
780 tap_fd = open(tap_dev, TAPDEV_OFLAGS);
782 warn("Unable to open %s", tap_dev);
788 * Check whether the device file is a tap(4)
791 if (fstat(tap_fd, &st) == 0 && S_ISCHR(st.st_mode) &&
792 TAPDEV_MAJOR(st.st_rdev) == TAP_CDEV_MAJOR) {
793 *tap_unit = TAPDEV_MINOR(st.st_rdev);
796 * Bring up the corresponding tap(4) interface
798 if (netif_set_tapflags(*tap_unit, IFF_UP, s) == 0)
801 warnx("%s is not a tap(4) device", tap_dev);
817 * Following syntax is supported,
818 * 1) x.x.x.x tap(4)'s address is x.x.x.x
820 * 2) x.x.x.x/z tap(4)'s address is x.x.x.x
821 * tap(4)'s netmask len is z
823 * 3) x.x.x.x:y.y.y.y tap(4)'s address is x.x.x.x
824 * pseudo netif's address is y.y.y.y
826 * 4) x.x.x.x:y.y.y.y/z tap(4)'s address is x.x.x.x
827 * pseudo netif's address is y.y.y.y
828 * tap(4) and pseudo netif's netmask len are z
830 * 5) bridgeX tap(4) will be added to bridgeX
832 * 6) bridgeX:y.y.y.y tap(4) will be added to bridgeX
833 * pseudo netif's address is y.y.y.y
835 * 7) bridgeX:y.y.y.y/z tap(4) will be added to bridgeX
836 * pseudo netif's address is y.y.y.y
837 * pseudo netif's netmask len is z
841 netif_init_tap(int tap_unit, in_addr_t *addr, in_addr_t *mask, int s)
843 in_addr_t tap_addr, netmask, netif_addr;
845 char *tok, *masklen_str, *ifbridge;
850 tok = strtok(NULL, ":/");
853 * Nothing special, simply use tap(4) as backend
858 if (inet_pton(AF_INET, tok, &tap_addr) > 0) {
860 * tap(4)'s address is supplied
865 * If there is next token, then it may be pseudo
866 * netif's address or netmask len for tap(4)
871 * Not tap(4)'s address, assume it as a bridge(4)
878 * If there is next token, then it must be pseudo
884 netmask = netif_addr = 0;
886 tok = strtok(NULL, ":/");
890 if (inet_pton(AF_INET, tok, &netif_addr) <= 0) {
891 if (next_netif_addr) {
892 warnx("Invalid pseudo netif address: %s", tok);
898 * Current token is not address, then it must be netmask len
903 * Current token is pseudo netif address, if there is next token
904 * it must be netmask len
906 masklen_str = strtok(NULL, "/");
909 /* Calculate netmask */
910 if (masklen_str != NULL) {
913 masklen = strtoul(masklen_str, NULL, 10);
914 if (masklen < 32 && masklen > 0) {
915 netmask = htonl(~((1LL << (32 - masklen)) - 1)
918 warnx("Invalid netmask len: %lu", masklen);
923 /* Make sure there is no more token left */
924 if (strtok(NULL, ":/") != NULL) {
925 warnx("Invalid argument to '-I'");
930 if (ifbridge == NULL) {
931 /* Set tap(4) address/netmask */
932 if (netif_set_tapaddr(tap_unit, tap_addr, netmask, s) < 0)
935 /* Tie tap(4) to bridge(4) */
936 if (netif_add_tap2brg(tap_unit, ifbridge, s) < 0)
946 * NetifInfo[] will be filled for pseudo netif initialization.
947 * NetifNum will be bumped to reflect the number of valid entries
952 init_netif(char *netifExp[], int netifExpNum)
956 if (netifExpNum == 0)
959 s = socket(AF_INET, SOCK_DGRAM, 0); /* for ioctl(SIOC) */
963 for (i = 0; i < netifExpNum; ++i) {
964 struct vknetif_info *info;
965 in_addr_t netif_addr, netif_mask;
966 int tap_fd, tap_unit;
969 netif = strtok(netifExp[i], ":");
971 warnx("Invalid argument to '-I'");
976 * Open tap(4) device file and bring up the
977 * corresponding interface
979 tap_fd = netif_open_tap(netif, &tap_unit, s);
984 * Initialize tap(4) and get address/netmask
987 * NB: Rest part of netifExp[i] is passed
988 * to netif_init_tap() implicitly.
990 if (netif_init_tap(tap_unit, &netif_addr, &netif_mask, s) < 0) {
992 * NB: Closing tap(4) device file will bring
993 * down the corresponding interface
999 info = &NetifInfo[NetifNum];
1000 info->tap_fd = tap_fd;
1001 info->tap_unit = tap_unit;
1002 info->netif_addr = netif_addr;
1003 info->netif_mask = netif_mask;
1006 if (NetifNum >= VKNETIF_MAX) /* XXX will this happen? */
1014 usage(const char *ctl)
1022 kprintf("cpu reset\n");
1029 kprintf("cpu halt\n");
1031 __asm__ __volatile("hlt");