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 1.36 2007/05/25 02:21:19 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, enum vkdisk_type type);
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];
121 char *cdFile[VKDISK_MAX];
123 int netifFileNum = 0;
133 kernel_mem_readonly = 1;
135 while ((c = getopt(ac, av, "c:svm:r:e:i:I:U")) != -1) {
139 * name=value:name=value:name=value...
142 kern_envp = malloc(n + 2);
143 for (i = 0; i < n; ++i) {
144 if (optarg[i] == ':')
147 kern_envp[i] = optarg[i];
153 boothowto |= RB_SINGLE;
159 memImageFile = optarg;
162 if (netifFileNum < VKNETIF_MAX)
163 netifFile[netifFileNum++] = optarg;
166 if (diskFileNum + cdFileNum < VKDISK_MAX)
167 diskFile[diskFileNum++] = optarg;
170 if (diskFileNum + cdFileNum < VKDISK_MAX)
171 cdFile[cdFileNum++] = optarg;
174 Maxmem_bytes = strtoull(optarg, &suffix, 0);
191 usage("Bad maxmem option");
198 kernel_mem_readonly = 0;
204 init_sys_memory(memImageFile);
209 init_disk(diskFile, diskFileNum, VKD_DISK);
210 init_disk(cdFile, cdFileNum, VKD_CD);
211 init_netif(netifFile, netifFileNum);
219 * Initialize system memory. This is the virtual kernel's 'RAM'.
223 init_sys_memory(char *imageFile)
230 * Figure out the system memory image size. If an image file was
231 * specified and -m was not specified, use the image file's size.
234 if (imageFile && stat(imageFile, &st) == 0 && Maxmem_bytes == 0)
235 Maxmem_bytes = (vm_paddr_t)st.st_size;
236 if ((imageFile == NULL || stat(imageFile, &st) < 0) &&
238 err(1, "Cannot create new memory file %s unless "
239 "system memory size is specified with -m",
245 * Maxmem must be known at this time
247 if (Maxmem_bytes < 32 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) {
248 err(1, "Bad maxmem specification: 32MB minimum, "
249 "multiples of %dMB only",
250 SEG_SIZE / 1024 / 1024);
255 * Generate an image file name if necessary, then open/create the
256 * file exclusively locked. Do not allow multiple virtual kernels
257 * to use the same image file.
259 if (imageFile == NULL) {
260 for (i = 0; i < 1000000; ++i) {
261 asprintf(&imageFile, "/var/vkernel/memimg.%06d", i);
263 O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644);
264 if (fd < 0 && errno == EWOULDBLOCK) {
271 fd = open(imageFile, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644);
273 printf("Using memory file: %s\n", imageFile);
274 if (fd < 0 || fstat(fd, &st) < 0) {
275 err(1, "Unable to open/create %s", imageFile);
280 * Truncate or extend the file as necessary.
282 if (st.st_size > Maxmem_bytes) {
283 ftruncate(fd, Maxmem_bytes);
284 } else if (st.st_size < Maxmem_bytes) {
286 off_t off = st.st_size & ~SEG_MASK;
288 kprintf("%s: Reserving blocks for memory image\n", imageFile);
289 zmem = malloc(SEG_SIZE);
290 bzero(zmem, SEG_SIZE);
291 lseek(fd, off, SEEK_SET);
292 while (off < Maxmem_bytes) {
293 if (write(fd, zmem, SEG_SIZE) != SEG_SIZE) {
294 err(1, "Unable to reserve blocks for memory image");
300 err(1, "Unable to reserve blocks for memory image");
304 Maxmem = Maxmem_bytes >> PAGE_SHIFT;
308 * Initialize kernel memory. This reserves kernel virtual memory by using
314 init_kern_memory(void)
320 char *topofstack = &dummy;
325 * Memory map our kernel virtual memory space. Note that the
326 * kernel image itself is not made part of this memory for the
329 * The memory map must be segment-aligned so we can properly
332 * If the system kernel has a different MAXDSIZ, it might not
333 * be possible to map kernel memory in its prefered location.
334 * Try a number of different locations.
336 try = (void *)0x40000000;
338 while ((char *)try + KERNEL_KVA_SIZE < topofstack) {
339 base = mmap(try, KERNEL_KVA_SIZE, PROT_READ|PROT_WRITE,
340 MAP_FILE|MAP_SHARED|MAP_VPAGETABLE,
344 if (base != MAP_FAILED)
345 munmap(base, KERNEL_KVA_SIZE);
346 try = (char *)try + 0x10000000;
349 err(1, "Unable to mmap() kernel virtual memory!");
352 madvise(base, KERNEL_KVA_SIZE, MADV_NOSYNC);
353 KvaStart = (vm_offset_t)base;
354 KvaSize = KERNEL_KVA_SIZE;
355 KvaEnd = KvaStart + KvaSize;
356 printf("KVM mapped at %p-%p\n", (void *)KvaStart, (void *)KvaEnd);
359 * Create a top-level page table self-mapping itself.
361 * Initialize the page directory at physical page index 0 to point
362 * to an array of page table pages starting at physical page index 1
364 lseek(MemImageFd, 0L, 0);
365 for (i = 0; i < KERNEL_KVA_SIZE / SEG_SIZE; ++i) {
366 pte = ((i + 1) * PAGE_SIZE) | VPTE_V | VPTE_R | VPTE_W;
367 write(MemImageFd, &pte, sizeof(pte));
371 * Initialize the PTEs in the page table pages required to map the
372 * page table itself. This includes mapping the page directory page
373 * at the base so we go one more loop then normal.
375 lseek(MemImageFd, PAGE_SIZE, 0);
376 for (i = 0; i <= KERNEL_KVA_SIZE / SEG_SIZE * sizeof(vpte_t); ++i) {
377 pte = (i * PAGE_SIZE) | VPTE_V | VPTE_R | VPTE_W;
378 write(MemImageFd, &pte, sizeof(pte));
382 * Initialize remaining PTEs to 0. We may be reusing a memory image
383 * file. This is approximately a megabyte.
385 i = (KERNEL_KVA_SIZE / PAGE_SIZE - i) * sizeof(pte);
386 zero = malloc(PAGE_SIZE);
387 bzero(zero, PAGE_SIZE);
389 write(MemImageFd, zero, (i > PAGE_SIZE) ? PAGE_SIZE : i);
390 i = i - ((i > PAGE_SIZE) ? PAGE_SIZE : i);
395 * Enable the page table and calculate pointers to our self-map
396 * for easy kernel page table manipulation.
398 * KernelPTA must be offset so we can do direct VA translations
400 mcontrol(base, KERNEL_KVA_SIZE, MADV_SETMAP,
401 0 | VPTE_R | VPTE_W | VPTE_V);
402 KernelPTD = (vpte_t *)base; /* pg directory */
403 KernelPTA = (vpte_t *)((char *)base + PAGE_SIZE); /* pg table pages */
404 KernelPTA -= KvaStart >> PAGE_SHIFT;
407 * phys_avail[] represents unallocated physical memory. MI code
408 * will use phys_avail[] to create the vm_page array.
410 phys_avail[0] = PAGE_SIZE +
411 KERNEL_KVA_SIZE / PAGE_SIZE * sizeof(vpte_t);
412 phys_avail[0] = (phys_avail[0] + PAGE_MASK) & ~(vm_paddr_t)PAGE_MASK;
413 phys_avail[1] = Maxmem_bytes;
416 * (virtual_start, virtual_end) represent unallocated kernel virtual
417 * memory. MI code will create kernel_map using these parameters.
419 virtual_start = KvaStart + PAGE_SIZE +
420 KERNEL_KVA_SIZE / PAGE_SIZE * sizeof(vpte_t);
421 virtual_start = (virtual_start + PAGE_MASK) & ~(vm_offset_t)PAGE_MASK;
422 virtual_end = KvaStart + KERNEL_KVA_SIZE;
425 * kernel_vm_end could be set to virtual_end but we want some
426 * indication of how much of the kernel_map we've used, so
427 * set it low and let pmap_growkernel increase it even though we
428 * don't need to create any new page table pages.
430 kernel_vm_end = virtual_start;
433 * Allocate space for process 0's UAREA.
435 proc0paddr = (void *)virtual_start;
436 for (i = 0; i < UPAGES; ++i) {
437 pmap_kenter_quick(virtual_start, phys_avail[0]);
438 virtual_start += PAGE_SIZE;
439 phys_avail[0] += PAGE_SIZE;
445 crashdumpmap = virtual_start;
446 virtual_start += MAXDUMPPGS * PAGE_SIZE;
449 * msgbufp maps the system message buffer
451 assert((MSGBUF_SIZE & PAGE_MASK) == 0);
452 msgbufp = (void *)virtual_start;
453 for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) {
454 pmap_kenter_quick(virtual_start, phys_avail[0]);
455 virtual_start += PAGE_SIZE;
456 phys_avail[0] += PAGE_SIZE;
458 msgbufinit(msgbufp, MSGBUF_SIZE);
461 * used by kern_memio for /dev/mem access
463 ptvmmap = (caddr_t)virtual_start;
464 virtual_start += PAGE_SIZE;
467 * Bootstrap the kernel_pmap
473 * Map the per-cpu globaldata for cpu #0. Allocate the space using
474 * virtual_start and phys_avail[0]
478 init_globaldata(void)
485 * Reserve enough KVA to cover possible cpus. This is a considerable
486 * amount of KVA since the privatespace structure includes two
487 * whole page table mappings.
489 virtual_start = (virtual_start + SEG_MASK) & ~(vm_offset_t)SEG_MASK;
490 CPU_prvspace = (void *)virtual_start;
491 virtual_start += sizeof(struct privatespace) * SMP_MAXCPU;
494 * Allocate enough physical memory to cover the mdglobaldata
495 * portion of the space and the idle stack and map the pages
496 * into KVA. For cpu #0 only.
498 for (i = 0; i < sizeof(struct mdglobaldata); i += PAGE_SIZE) {
500 va = (vm_offset_t)&CPU_prvspace[0].mdglobaldata + i;
501 pmap_kenter_quick(va, pa);
502 phys_avail[0] += PAGE_SIZE;
504 for (i = 0; i < sizeof(CPU_prvspace[0].idlestack); i += PAGE_SIZE) {
506 va = (vm_offset_t)&CPU_prvspace[0].idlestack + i;
507 pmap_kenter_quick(va, pa);
508 phys_avail[0] += PAGE_SIZE;
512 * Setup the %gs for cpu #0. The mycpu macro works after this
515 tls_set_fs(&CPU_prvspace[0], sizeof(struct privatespace));
519 * Initialize very low level systems including thread0, proc0, etc.
525 struct mdglobaldata *gd;
527 gd = &CPU_prvspace[0].mdglobaldata;
528 bzero(gd, sizeof(*gd));
530 gd->mi.gd_curthread = &thread0;
531 thread0.td_gd = &gd->mi;
533 ncpus2 = 1; /* rounded down power of 2 */
534 ncpus_fit = 1; /* rounded up power of 2 */
535 /* ncpus2_mask and ncpus_fit_mask are 0 */
537 gd->mi.gd_prvspace = &CPU_prvspace[0];
538 mi_gdinit(&gd->mi, 0);
540 mi_proc0init(&gd->mi, proc0paddr);
541 lwp0.lwp_md.md_regs = &proc0_tf;
546 #if 0 /* #ifdef DDB */
548 if (boothowto & RB_KDB)
549 Debugger("Boot flags requested debugger");
552 initializecpu(); /* Initialize CPU registers */
554 init_param2((phys_avail[1] - phys_avail[0]) / PAGE_SIZE);
558 * Map the message buffer
560 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE)
561 pmap_kenter((vm_offset_t)msgbufp + off, avail_end + off);
562 msgbufinit(msgbufp, MSGBUF_SIZE);
565 thread0.td_pcb_cr3 ... MMU
566 lwp0.lwp_md.md_regs = &proc0_tf;
571 * Filesystem image paths for the virtual kernel are optional.
572 * If specified they each should point to a disk image,
573 * the first of which will become the root disk.
575 * The virtual kernel caches data from our 'disk' just like a normal kernel,
576 * so we do not really want the real kernel to cache the data too. Use
577 * O_DIRECT to remove the duplication.
581 init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type)
585 if (diskFileNum == 0)
588 for(i=0; i < diskFileNum; i++){
593 warnx("Invalid argument to '-r'");
597 if (DiskNum < VKDISK_MAX) {
599 struct vkdisk_info* info = NULL;
603 if (type == VKD_DISK)
604 fd = open(fname, O_RDWR|O_DIRECT, 0644);
606 fd = open(fname, O_RDONLY|O_DIRECT, 0644);
607 if (fd < 0 || fstat(fd, &st) < 0) {
608 err(1, "Unable to open/create %s", fname);
612 info = &DiskInfo[DiskNum];
618 memcpy(info->fname, fname, l);
622 rootdevnames[0] = "cd9660:vcd0a";
623 else if (type == VKD_DISK)
624 rootdevnames[0] = "ufs:vkd0a";
629 warnx("vkd%d (%s) > VKDISK_MAX", DiskNum, fname);
637 netif_set_tapflags(int tap_unit, int f, int s)
642 bzero(&ifr, sizeof(ifr));
644 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit);
645 if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) {
646 warn("tap%d: ioctl(SIOCGIFFLAGS) failed", tap_unit);
653 * If the flags are already set/cleared, then we return
654 * immediately to avoid extra syscalls
656 flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16);
660 if ((flags & f) == 0)
671 * Fix up ifreq.ifr_name, since it may be trashed
672 * in previous ioctl(SIOCGIFFLAGS)
674 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit);
676 ifr.ifr_flags = flags & 0xffff;
677 ifr.ifr_flagshigh = flags >> 16;
678 if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) {
679 warn("tap%d: ioctl(SIOCSIFFLAGS) failed", tap_unit);
687 netif_set_tapaddr(int tap_unit, in_addr_t addr, in_addr_t mask, int s)
689 struct ifaliasreq ifra;
690 struct sockaddr_in *in;
692 bzero(&ifra, sizeof(ifra));
693 snprintf(ifra.ifra_name, sizeof(ifra.ifra_name), "tap%d", tap_unit);
696 in = (struct sockaddr_in *)&ifra.ifra_addr;
697 in->sin_family = AF_INET;
698 in->sin_len = sizeof(*in);
699 in->sin_addr.s_addr = addr;
703 in = (struct sockaddr_in *)&ifra.ifra_mask;
704 in->sin_len = sizeof(*in);
705 in->sin_addr.s_addr = mask;
708 if (ioctl(s, SIOCAIFADDR, &ifra) < 0) {
709 warn("tap%d: ioctl(SIOCAIFADDR) failed", tap_unit);
717 netif_add_tap2brg(int tap_unit, const char *ifbridge, int s)
722 bzero(&ifbr, sizeof(ifbr));
723 snprintf(ifbr.ifbr_ifsname, sizeof(ifbr.ifbr_ifsname),
726 bzero(&ifd, sizeof(ifd));
727 strlcpy(ifd.ifd_name, ifbridge, sizeof(ifd.ifd_name));
728 ifd.ifd_cmd = BRDGADD;
729 ifd.ifd_len = sizeof(ifbr);
730 ifd.ifd_data = &ifbr;
732 if (ioctl(s, SIOCSDRVSPEC, &ifd) < 0) {
734 * 'errno == EEXIST' means that the tap(4) is already
735 * a member of the bridge(4)
737 if (errno != EEXIST) {
738 warn("ioctl(%s, SIOCSDRVSPEC) failed", ifbridge);
745 #define TAPDEV_OFLAGS (O_RDWR | O_NONBLOCK)
747 /* XXX major()/minor() can't be used in vkernel */
748 #define TAPDEV_MAJOR(x) ((int)(((u_int)(x) >> 8) & 0xff))
749 #define TAPDEV_MINOR(x) ((int)((x) & 0xffff00ff))
751 #ifndef TAP_CDEV_MAJOR
752 #define TAP_CDEV_MAJOR 149
756 * Locate the first unused tap(4) device file if auto mode is requested,
757 * or open the user supplied device file, and bring up the corresponding
760 * NOTE: Only tap(4) device file is supported currently
764 netif_open_tap(const char *netif, int *tap_unit, int s)
766 char tap_dev[MAXPATHLEN];
772 if (strcmp(netif, "auto") == 0) {
776 * Find first unused tap(4) device file
779 snprintf(tap_dev, sizeof(tap_dev), "/dev/tap%d", i);
780 tap_fd = open(tap_dev, TAPDEV_OFLAGS);
781 if (tap_fd >= 0 || errno == ENOENT)
785 warnx("Unable to find a free tap(4)");
790 * User supplied tap(4) device file
792 if (netif[0] == '/') /* Absolute path */
793 strlcpy(tap_dev, netif, sizeof(tap_dev));
795 snprintf(tap_dev, sizeof(tap_dev), "/dev/%s", netif);
797 tap_fd = open(tap_dev, TAPDEV_OFLAGS);
799 warn("Unable to open %s", tap_dev);
805 * Check whether the device file is a tap(4)
808 if (fstat(tap_fd, &st) == 0 && S_ISCHR(st.st_mode) &&
809 TAPDEV_MAJOR(st.st_rdev) == TAP_CDEV_MAJOR) {
810 *tap_unit = TAPDEV_MINOR(st.st_rdev);
813 * Bring up the corresponding tap(4) interface
815 if (netif_set_tapflags(*tap_unit, IFF_UP, s) == 0)
818 warnx("%s is not a tap(4) device", tap_dev);
834 * Following syntax is supported,
835 * 1) x.x.x.x tap(4)'s address is x.x.x.x
837 * 2) x.x.x.x/z tap(4)'s address is x.x.x.x
838 * tap(4)'s netmask len is z
840 * 3) x.x.x.x:y.y.y.y tap(4)'s address is x.x.x.x
841 * pseudo netif's address is y.y.y.y
843 * 4) x.x.x.x:y.y.y.y/z tap(4)'s address is x.x.x.x
844 * pseudo netif's address is y.y.y.y
845 * tap(4) and pseudo netif's netmask len are z
847 * 5) bridgeX tap(4) will be added to bridgeX
849 * 6) bridgeX:y.y.y.y tap(4) will be added to bridgeX
850 * pseudo netif's address is y.y.y.y
852 * 7) bridgeX:y.y.y.y/z tap(4) will be added to bridgeX
853 * pseudo netif's address is y.y.y.y
854 * pseudo netif's netmask len is z
858 netif_init_tap(int tap_unit, in_addr_t *addr, in_addr_t *mask, int s)
860 in_addr_t tap_addr, netmask, netif_addr;
862 char *tok, *masklen_str, *ifbridge;
867 tok = strtok(NULL, ":/");
870 * Nothing special, simply use tap(4) as backend
875 if (inet_pton(AF_INET, tok, &tap_addr) > 0) {
877 * tap(4)'s address is supplied
882 * If there is next token, then it may be pseudo
883 * netif's address or netmask len for tap(4)
888 * Not tap(4)'s address, assume it as a bridge(4)
895 * If there is next token, then it must be pseudo
901 netmask = netif_addr = 0;
903 tok = strtok(NULL, ":/");
907 if (inet_pton(AF_INET, tok, &netif_addr) <= 0) {
908 if (next_netif_addr) {
909 warnx("Invalid pseudo netif address: %s", tok);
915 * Current token is not address, then it must be netmask len
920 * Current token is pseudo netif address, if there is next token
921 * it must be netmask len
923 masklen_str = strtok(NULL, "/");
926 /* Calculate netmask */
927 if (masklen_str != NULL) {
930 masklen = strtoul(masklen_str, NULL, 10);
931 if (masklen < 32 && masklen > 0) {
932 netmask = htonl(~((1LL << (32 - masklen)) - 1)
935 warnx("Invalid netmask len: %lu", masklen);
940 /* Make sure there is no more token left */
941 if (strtok(NULL, ":/") != NULL) {
942 warnx("Invalid argument to '-I'");
947 if (ifbridge == NULL) {
948 /* Set tap(4) address/netmask */
949 if (netif_set_tapaddr(tap_unit, tap_addr, netmask, s) < 0)
952 /* Tie tap(4) to bridge(4) */
953 if (netif_add_tap2brg(tap_unit, ifbridge, s) < 0)
963 * NetifInfo[] will be filled for pseudo netif initialization.
964 * NetifNum will be bumped to reflect the number of valid entries
969 init_netif(char *netifExp[], int netifExpNum)
973 if (netifExpNum == 0)
976 s = socket(AF_INET, SOCK_DGRAM, 0); /* for ioctl(SIOC) */
980 for (i = 0; i < netifExpNum; ++i) {
981 struct vknetif_info *info;
982 in_addr_t netif_addr, netif_mask;
983 int tap_fd, tap_unit;
986 netif = strtok(netifExp[i], ":");
988 warnx("Invalid argument to '-I'");
993 * Open tap(4) device file and bring up the
994 * corresponding interface
996 tap_fd = netif_open_tap(netif, &tap_unit, s);
1001 * Initialize tap(4) and get address/netmask
1004 * NB: Rest part of netifExp[i] is passed
1005 * to netif_init_tap() implicitly.
1007 if (netif_init_tap(tap_unit, &netif_addr, &netif_mask, s) < 0) {
1009 * NB: Closing tap(4) device file will bring
1010 * down the corresponding interface
1016 info = &NetifInfo[NetifNum];
1017 info->tap_fd = tap_fd;
1018 info->tap_unit = tap_unit;
1019 info->netif_addr = netif_addr;
1020 info->netif_mask = netif_mask;
1023 if (NetifNum >= VKNETIF_MAX) /* XXX will this happen? */
1031 usage(const char *ctl)
1039 kprintf("cpu reset\n");
1046 kprintf("cpu halt\n");
1048 __asm__ __volatile("hlt");