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 1.56 2008/05/27 07:48:00 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 <sys/sysctl.h>
54 #include <vm/vm_page.h>
56 #include <machine/cpu.h>
57 #include <machine/globaldata.h>
58 #include <machine/tls.h>
59 #include <machine/md_var.h>
60 #include <machine/vmparam.h>
61 #include <cpu/specialreg.h>
64 #include <net/if_arp.h>
65 #include <net/ethernet.h>
66 #include <net/bridge/if_bridgevar.h>
67 #include <netinet/in.h>
68 #include <arpa/inet.h>
80 vm_paddr_t phys_avail[16];
82 vm_paddr_t Maxmem_bytes;
84 struct vkdisk_info DiskInfo[VKDISK_MAX];
86 struct vknetif_info NetifInfo[VKNETIF_MAX];
92 vm_offset_t virtual_start;
93 vm_offset_t virtual_end;
94 vm_offset_t virtual2_start;
95 vm_offset_t virtual2_end;
96 vm_offset_t kernel_vm_end;
97 vm_offset_t crashdumpmap;
98 vm_offset_t clean_sva;
99 vm_offset_t clean_eva;
100 struct msgbuf *msgbufp;
103 vpte_t *KernelPTA; /* Warning: Offset for direct VA translation */
104 u_int cpu_feature; /* XXX */
106 int64_t tsc_frequency;
107 int optcpus; /* number of cpus - see mp_start() */
108 int lwp_cpu_lock; /* if/how to lock virtual CPUs to real CPUs */
109 int real_ncpus; /* number of real CPUs */
110 int next_cpu; /* next real CPU to lock a virtual CPU to */
112 int via_feature_xcrypt = 0; /* XXX */
113 int via_feature_rng = 0; /* XXX */
115 struct privatespace *CPU_prvspace;
117 static struct trapframe proc0_tf;
118 static void *proc0paddr;
120 static void init_sys_memory(char *imageFile);
121 static void init_kern_memory(void);
122 static void init_globaldata(void);
123 static void init_vkernel(void);
124 static void init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type);
125 static void init_netif(char *netifExp[], int netifFileNum);
126 static void writepid( void );
127 static void cleanpid( void );
128 static int unix_connect(const char *path);
129 static void usage(const char *ctl, ...);
132 static char **save_av;
135 * Kernel startup for virtual kernels - standard main()
138 main(int ac, char **av)
140 char *memImageFile = NULL;
141 char *netifFile[VKNETIF_MAX];
142 char *diskFile[VKDISK_MAX];
143 char *cdFile[VKDISK_MAX];
146 int netifFileNum = 0;
149 int bootOnDisk = -1; /* set below to vcd (0) or vkd (1) */
155 int real_vkernel_enable;
165 kernel_mem_readonly = 1;
169 lwp_cpu_lock = LCL_NONE;
171 real_vkernel_enable = 0;
172 vsize = sizeof(real_vkernel_enable);
173 sysctlbyname("vm.vkernel_enable", &real_vkernel_enable, &vsize, NULL,0);
175 if (real_vkernel_enable == 0) {
176 errx(1, "vm.vkernel_enable is 0, must be set "
177 "to 1 to execute a vkernel!");
181 vsize = sizeof(real_ncpus);
182 sysctlbyname("hw.ncpu", &real_ncpus, &vsize, NULL, 0);
184 while ((c = getopt(ac, av, "c:svl:m:n:r:e:i:p:I:U")) != -1) {
188 * name=value:name=value:name=value...
191 * Allow values to be quoted but note that shells
192 * may remove the quotes, so using this feature
193 * to embed colons may require a backslash.
197 kern_envp = malloc(n + 2);
198 for (i = j = 0; i < n; ++i) {
199 if (optarg[i] == '"')
201 else if (optarg[i] == '\'')
203 else if (isq == 0 && optarg[i] == ':')
206 kern_envp[j++] = optarg[i];
212 boothowto |= RB_SINGLE;
218 memImageFile = optarg;
221 if (netifFileNum < VKNETIF_MAX)
222 netifFile[netifFileNum++] = strdup(optarg);
227 if (diskFileNum + cdFileNum < VKDISK_MAX)
228 diskFile[diskFileNum++] = strdup(optarg);
233 if (diskFileNum + cdFileNum < VKDISK_MAX)
234 cdFile[cdFileNum++] = strdup(optarg);
237 Maxmem_bytes = strtoull(optarg, &suffix, 0);
254 usage("Bad maxmem option");
262 if (strncmp("map", optarg, 3) == 0) {
263 lwp_cpu_lock = LCL_PER_CPU;
264 if (optarg[3] == ',') {
265 next_cpu = strtol(optarg+4, &endp, 0);
267 usage("Bad target CPU number at '%s'", endp);
271 if (next_cpu < 0 || next_cpu > real_ncpus - 1)
272 usage("Bad target CPU, valid range is 0-%d", real_ncpus - 1);
273 } else if (strncmp("any", optarg, 3) == 0) {
274 lwp_cpu_lock = LCL_NONE;
276 lwp_cpu_lock = LCL_SINGLE_CPU;
277 next_cpu = strtol(optarg, &endp, 0);
279 usage("Bad target CPU number at '%s'", endp);
280 if (next_cpu < 0 || next_cpu > real_ncpus - 1)
281 usage("Bad target CPU, valid range is 0-%d", real_ncpus - 1);
286 * This value is set up by mp_start(), don't just
290 optcpus = strtol(optarg, NULL, 0);
291 if (optcpus < 1 || optcpus > MAXCPU)
292 usage("Bad ncpus, valid range is 1-%d", MAXCPU);
294 if (strtol(optarg, NULL, 0) != 1) {
295 usage("You built a UP vkernel, only 1 cpu!");
304 kernel_mem_readonly = 0;
311 init_sys_memory(memImageFile);
321 vsize = sizeof(tsc_present);
322 sysctlbyname("hw.tsc_present", &tsc_present, &vsize, NULL, 0);
323 vsize = sizeof(tsc_frequency);
324 sysctlbyname("hw.tsc_frequency", &tsc_frequency, &vsize, NULL, 0);
326 cpu_feature |= CPUID_TSC;
331 vsize = sizeof(supports_sse);
333 sysctlbyname("hw.instruction_sse", &supports_sse, &vsize, NULL, 0);
334 init_fpu(supports_sse);
336 cpu_feature |= CPUID_SSE | CPUID_FXSR;
339 * We boot from the first installed disk.
341 if (bootOnDisk == 1) {
342 init_disk(diskFile, diskFileNum, VKD_DISK);
343 init_disk(cdFile, cdFileNum, VKD_CD);
345 init_disk(cdFile, cdFileNum, VKD_CD);
346 init_disk(diskFile, diskFileNum, VKD_DISK);
348 init_netif(netifFile, netifFileNum);
356 * Initialize system memory. This is the virtual kernel's 'RAM'.
360 init_sys_memory(char *imageFile)
367 * Figure out the system memory image size. If an image file was
368 * specified and -m was not specified, use the image file's size.
371 if (imageFile && stat(imageFile, &st) == 0 && Maxmem_bytes == 0)
372 Maxmem_bytes = (vm_paddr_t)st.st_size;
373 if ((imageFile == NULL || stat(imageFile, &st) < 0) &&
375 err(1, "Cannot create new memory file %s unless "
376 "system memory size is specified with -m",
382 * Maxmem must be known at this time
384 if (Maxmem_bytes < 32 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) {
385 err(1, "Bad maxmem specification: 32MB minimum, "
386 "multiples of %dMB only",
387 SEG_SIZE / 1024 / 1024);
392 * Generate an image file name if necessary, then open/create the
393 * file exclusively locked. Do not allow multiple virtual kernels
394 * to use the same image file.
396 if (imageFile == NULL) {
397 for (i = 0; i < 1000000; ++i) {
398 asprintf(&imageFile, "/var/vkernel/memimg.%06d", i);
400 O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644);
401 if (fd < 0 && errno == EWOULDBLOCK) {
408 fd = open(imageFile, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644);
410 printf("Using memory file: %s\n", imageFile);
411 if (fd < 0 || fstat(fd, &st) < 0) {
412 err(1, "Unable to open/create %s", imageFile);
417 * Truncate or extend the file as necessary.
419 if (st.st_size > Maxmem_bytes) {
420 ftruncate(fd, Maxmem_bytes);
421 } else if (st.st_size < Maxmem_bytes) {
423 off_t off = st.st_size & ~SEG_MASK;
425 kprintf("%s: Reserving blocks for memory image\n", imageFile);
426 zmem = malloc(SEG_SIZE);
427 bzero(zmem, SEG_SIZE);
428 lseek(fd, off, SEEK_SET);
429 while (off < Maxmem_bytes) {
430 if (write(fd, zmem, SEG_SIZE) != SEG_SIZE) {
431 err(1, "Unable to reserve blocks for memory image");
437 err(1, "Unable to reserve blocks for memory image");
441 Maxmem = Maxmem_bytes >> PAGE_SHIFT;
445 * Initialize kernel memory. This reserves kernel virtual memory by using
451 init_kern_memory(void)
457 char *topofstack = &dummy;
462 * Memory map our kernel virtual memory space. Note that the
463 * kernel image itself is not made part of this memory for the
466 * The memory map must be segment-aligned so we can properly
469 * If the system kernel has a different MAXDSIZ, it might not
470 * be possible to map kernel memory in its prefered location.
471 * Try a number of different locations.
473 try = (void *)0x40000000;
475 while ((char *)try + KERNEL_KVA_SIZE < topofstack) {
476 base = mmap(try, KERNEL_KVA_SIZE, PROT_READ|PROT_WRITE,
477 MAP_FILE|MAP_SHARED|MAP_VPAGETABLE,
481 if (base != MAP_FAILED)
482 munmap(base, KERNEL_KVA_SIZE);
483 try = (char *)try + 0x10000000;
486 err(1, "Unable to mmap() kernel virtual memory!");
489 madvise(base, KERNEL_KVA_SIZE, MADV_NOSYNC);
490 KvaStart = (vm_offset_t)base;
491 KvaSize = KERNEL_KVA_SIZE;
492 KvaEnd = KvaStart + KvaSize;
493 printf("KVM mapped at %p-%p\n", (void *)KvaStart, (void *)KvaEnd);
496 * Create a top-level page table self-mapping itself.
498 * Initialize the page directory at physical page index 0 to point
499 * to an array of page table pages starting at physical page index 1
501 lseek(MemImageFd, 0L, 0);
502 for (i = 0; i < KERNEL_KVA_SIZE / SEG_SIZE; ++i) {
503 pte = ((i + 1) * PAGE_SIZE) | VPTE_V | VPTE_R | VPTE_W;
504 write(MemImageFd, &pte, sizeof(pte));
508 * Initialize the PTEs in the page table pages required to map the
509 * page table itself. This includes mapping the page directory page
510 * at the base so we go one more loop then normal.
512 lseek(MemImageFd, PAGE_SIZE, 0);
513 for (i = 0; i <= KERNEL_KVA_SIZE / SEG_SIZE * sizeof(vpte_t); ++i) {
514 pte = (i * PAGE_SIZE) | VPTE_V | VPTE_R | VPTE_W;
515 write(MemImageFd, &pte, sizeof(pte));
519 * Initialize remaining PTEs to 0. We may be reusing a memory image
520 * file. This is approximately a megabyte.
522 i = (KERNEL_KVA_SIZE / PAGE_SIZE - i) * sizeof(pte);
523 zero = malloc(PAGE_SIZE);
524 bzero(zero, PAGE_SIZE);
526 write(MemImageFd, zero, (i > PAGE_SIZE) ? PAGE_SIZE : i);
527 i = i - ((i > PAGE_SIZE) ? PAGE_SIZE : i);
532 * Enable the page table and calculate pointers to our self-map
533 * for easy kernel page table manipulation.
535 * KernelPTA must be offset so we can do direct VA translations
537 mcontrol(base, KERNEL_KVA_SIZE, MADV_SETMAP,
538 0 | VPTE_R | VPTE_W | VPTE_V);
539 KernelPTD = (vpte_t *)base; /* pg directory */
540 KernelPTA = (vpte_t *)((char *)base + PAGE_SIZE); /* pg table pages */
541 KernelPTA -= KvaStart >> PAGE_SHIFT;
544 * phys_avail[] represents unallocated physical memory. MI code
545 * will use phys_avail[] to create the vm_page array.
547 phys_avail[0] = PAGE_SIZE +
548 KERNEL_KVA_SIZE / PAGE_SIZE * sizeof(vpte_t);
549 phys_avail[0] = (phys_avail[0] + PAGE_MASK) & ~(vm_paddr_t)PAGE_MASK;
550 phys_avail[1] = Maxmem_bytes;
553 * (virtual_start, virtual_end) represent unallocated kernel virtual
554 * memory. MI code will create kernel_map using these parameters.
556 virtual_start = KvaStart + PAGE_SIZE +
557 KERNEL_KVA_SIZE / PAGE_SIZE * sizeof(vpte_t);
558 virtual_start = (virtual_start + PAGE_MASK) & ~(vm_offset_t)PAGE_MASK;
559 virtual_end = KvaStart + KERNEL_KVA_SIZE;
562 * kernel_vm_end could be set to virtual_end but we want some
563 * indication of how much of the kernel_map we've used, so
564 * set it low and let pmap_growkernel increase it even though we
565 * don't need to create any new page table pages.
567 kernel_vm_end = virtual_start;
570 * Allocate space for process 0's UAREA.
572 proc0paddr = (void *)virtual_start;
573 for (i = 0; i < UPAGES; ++i) {
574 pmap_kenter_quick(virtual_start, phys_avail[0]);
575 virtual_start += PAGE_SIZE;
576 phys_avail[0] += PAGE_SIZE;
582 crashdumpmap = virtual_start;
583 virtual_start += MAXDUMPPGS * PAGE_SIZE;
586 * msgbufp maps the system message buffer
588 assert((MSGBUF_SIZE & PAGE_MASK) == 0);
589 msgbufp = (void *)virtual_start;
590 for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) {
591 pmap_kenter_quick(virtual_start, phys_avail[0]);
592 virtual_start += PAGE_SIZE;
593 phys_avail[0] += PAGE_SIZE;
595 msgbufinit(msgbufp, MSGBUF_SIZE);
598 * used by kern_memio for /dev/mem access
600 ptvmmap = (caddr_t)virtual_start;
601 virtual_start += PAGE_SIZE;
604 * Bootstrap the kernel_pmap
610 * Map the per-cpu globaldata for cpu #0. Allocate the space using
611 * virtual_start and phys_avail[0]
615 init_globaldata(void)
622 * Reserve enough KVA to cover possible cpus. This is a considerable
623 * amount of KVA since the privatespace structure includes two
624 * whole page table mappings.
626 virtual_start = (virtual_start + SEG_MASK) & ~(vm_offset_t)SEG_MASK;
627 CPU_prvspace = (void *)virtual_start;
628 virtual_start += sizeof(struct privatespace) * SMP_MAXCPU;
631 * Allocate enough physical memory to cover the mdglobaldata
632 * portion of the space and the idle stack and map the pages
633 * into KVA. For cpu #0 only.
635 for (i = 0; i < sizeof(struct mdglobaldata); i += PAGE_SIZE) {
637 va = (vm_offset_t)&CPU_prvspace[0].mdglobaldata + i;
638 pmap_kenter_quick(va, pa);
639 phys_avail[0] += PAGE_SIZE;
641 for (i = 0; i < sizeof(CPU_prvspace[0].idlestack); i += PAGE_SIZE) {
643 va = (vm_offset_t)&CPU_prvspace[0].idlestack + i;
644 pmap_kenter_quick(va, pa);
645 phys_avail[0] += PAGE_SIZE;
649 * Setup the %fs for cpu #0. The mycpu macro works after this
650 * point. Note that %gs is used by pthreads.
652 tls_set_fs(&CPU_prvspace[0], sizeof(struct privatespace));
656 * Initialize very low level systems including thread0, proc0, etc.
662 struct mdglobaldata *gd;
664 gd = &CPU_prvspace[0].mdglobaldata;
665 bzero(gd, sizeof(*gd));
667 gd->mi.gd_curthread = &thread0;
668 thread0.td_gd = &gd->mi;
670 ncpus2 = 1; /* rounded down power of 2 */
671 ncpus_fit = 1; /* rounded up power of 2 */
672 /* ncpus2_mask and ncpus_fit_mask are 0 */
674 gd->mi.gd_prvspace = &CPU_prvspace[0];
675 mi_gdinit(&gd->mi, 0);
677 mi_proc0init(&gd->mi, proc0paddr);
678 lwp0.lwp_md.md_regs = &proc0_tf;
683 #if 0 /* #ifdef DDB */
685 if (boothowto & RB_KDB)
686 Debugger("Boot flags requested debugger");
690 initializecpu(); /* Initialize CPU registers */
692 init_param2((phys_avail[1] - phys_avail[0]) / PAGE_SIZE);
696 * Map the message buffer
698 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE)
699 pmap_kenter((vm_offset_t)msgbufp + off, avail_end + off);
700 msgbufinit(msgbufp, MSGBUF_SIZE);
703 thread0.td_pcb_cr3 ... MMU
704 lwp0.lwp_md.md_regs = &proc0_tf;
709 * Filesystem image paths for the virtual kernel are optional.
710 * If specified they each should point to a disk image,
711 * the first of which will become the root disk.
713 * The virtual kernel caches data from our 'disk' just like a normal kernel,
714 * so we do not really want the real kernel to cache the data too. Use
715 * O_DIRECT to remove the duplication.
719 init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type)
723 if (diskFileNum == 0)
726 for(i=0; i < diskFileNum; i++){
731 warnx("Invalid argument to '-r'");
735 if (DiskNum < VKDISK_MAX) {
737 struct vkdisk_info* info = NULL;
741 if (type == VKD_DISK)
742 fd = open(fname, O_RDWR|O_DIRECT|O_EXLOCK|O_NONBLOCK, 0644);
744 fd = open(fname, O_RDONLY|O_DIRECT, 0644);
745 if (fd < 0 || fstat(fd, &st) < 0) {
747 fprintf(stderr, "You may already have a vkernel using this disk image!\n");
748 err(1, "Unable to open/create %s", fname);
751 /* get rid of O_NONBLOCK, keep O_DIRECT */
752 if (type == VKD_DISK)
753 fcntl(fd, F_SETFL, O_DIRECT);
755 info = &DiskInfo[DiskNum];
761 memcpy(info->fname, fname, l);
764 if (type == VKD_CD) {
765 rootdevnames[0] = "cd9660:vcd0a";
766 } else if (type == VKD_DISK) {
767 rootdevnames[0] = "ufs:vkd0s0a";
768 rootdevnames[1] = "ufs:vkd0s1a";
774 warnx("vkd%d (%s) > VKDISK_MAX", DiskNum, fname);
782 netif_set_tapflags(int tap_unit, int f, int s)
787 bzero(&ifr, sizeof(ifr));
789 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit);
790 if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) {
791 warn("tap%d: ioctl(SIOCGIFFLAGS) failed", tap_unit);
798 * If the flags are already set/cleared, then we return
799 * immediately to avoid extra syscalls
801 flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16);
805 if ((flags & f) == 0)
816 * Fix up ifreq.ifr_name, since it may be trashed
817 * in previous ioctl(SIOCGIFFLAGS)
819 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit);
821 ifr.ifr_flags = flags & 0xffff;
822 ifr.ifr_flagshigh = flags >> 16;
823 if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) {
824 warn("tap%d: ioctl(SIOCSIFFLAGS) failed", tap_unit);
832 netif_set_tapaddr(int tap_unit, in_addr_t addr, in_addr_t mask, int s)
834 struct ifaliasreq ifra;
835 struct sockaddr_in *in;
837 bzero(&ifra, sizeof(ifra));
838 snprintf(ifra.ifra_name, sizeof(ifra.ifra_name), "tap%d", tap_unit);
841 in = (struct sockaddr_in *)&ifra.ifra_addr;
842 in->sin_family = AF_INET;
843 in->sin_len = sizeof(*in);
844 in->sin_addr.s_addr = addr;
848 in = (struct sockaddr_in *)&ifra.ifra_mask;
849 in->sin_len = sizeof(*in);
850 in->sin_addr.s_addr = mask;
853 if (ioctl(s, SIOCAIFADDR, &ifra) < 0) {
854 warn("tap%d: ioctl(SIOCAIFADDR) failed", tap_unit);
862 netif_add_tap2brg(int tap_unit, const char *ifbridge, int s)
867 bzero(&ifbr, sizeof(ifbr));
868 snprintf(ifbr.ifbr_ifsname, sizeof(ifbr.ifbr_ifsname),
871 bzero(&ifd, sizeof(ifd));
872 strlcpy(ifd.ifd_name, ifbridge, sizeof(ifd.ifd_name));
873 ifd.ifd_cmd = BRDGADD;
874 ifd.ifd_len = sizeof(ifbr);
875 ifd.ifd_data = &ifbr;
877 if (ioctl(s, SIOCSDRVSPEC, &ifd) < 0) {
879 * 'errno == EEXIST' means that the tap(4) is already
880 * a member of the bridge(4)
882 if (errno != EEXIST) {
883 warn("ioctl(%s, SIOCSDRVSPEC) failed", ifbridge);
890 #define TAPDEV_OFLAGS (O_RDWR | O_NONBLOCK)
893 * Locate the first unused tap(4) device file if auto mode is requested,
894 * or open the user supplied device file, and bring up the corresponding
897 * NOTE: Only tap(4) device file is supported currently
901 netif_open_tap(const char *netif, int *tap_unit, int s)
903 char tap_dev[MAXPATHLEN];
910 if (strcmp(netif, "auto") == 0) {
912 * Find first unused tap(4) device file
914 tap_fd = open("/dev/tap", TAPDEV_OFLAGS);
916 warnc(errno, "Unable to find a free tap(4)");
921 * User supplied tap(4) device file or unix socket.
923 if (netif[0] == '/') /* Absolute path */
924 strlcpy(tap_dev, netif, sizeof(tap_dev));
926 snprintf(tap_dev, sizeof(tap_dev), "/dev/%s", netif);
928 tap_fd = open(tap_dev, TAPDEV_OFLAGS);
931 * If we cannot open normally try to connect to it.
934 tap_fd = unix_connect(tap_dev);
937 warn("Unable to open %s", tap_dev);
943 * Check whether the device file is a tap(4)
945 if (fstat(tap_fd, &st) < 0) {
947 } else if (S_ISCHR(st.st_mode)) {
948 dname = fdevname(tap_fd);
950 dname = strstr(dname, "tap");
953 * Bring up the corresponding tap(4) interface
955 *tap_unit = strtol(dname + 3, NULL, 10);
956 printf("TAP UNIT %d\n", *tap_unit);
957 if (netif_set_tapflags(*tap_unit, IFF_UP, s) == 0)
963 } else if (S_ISSOCK(st.st_mode)) {
965 * Special socket connection (typically to vknet). We
966 * do not have to do anything.
974 warnx("%s is not a tap(4) device or socket", tap_dev);
983 unix_connect(const char *path)
985 struct sockaddr_un sunx;
991 snprintf(sunx.sun_path, sizeof(sunx.sun_path), "%s", path);
992 len = offsetof(struct sockaddr_un, sun_path[strlen(sunx.sun_path)]);
993 ++len; /* include nul */
994 sunx.sun_family = AF_UNIX;
997 net_fd = socket(AF_UNIX, SOCK_SEQPACKET, 0);
1000 if (connect(net_fd, (void *)&sunx, len) < 0) {
1004 setsockopt(net_fd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(sndbuf));
1005 if (fstat(net_fd, &st) == 0)
1006 printf("Network socket buffer: %d bytes\n", st.st_blksize);
1007 fcntl(net_fd, F_SETFL, O_NONBLOCK);
1013 #undef TAPDEV_OFLAGS
1016 * Following syntax is supported,
1017 * 1) x.x.x.x tap(4)'s address is x.x.x.x
1019 * 2) x.x.x.x/z tap(4)'s address is x.x.x.x
1020 * tap(4)'s netmask len is z
1022 * 3) x.x.x.x:y.y.y.y tap(4)'s address is x.x.x.x
1023 * pseudo netif's address is y.y.y.y
1025 * 4) x.x.x.x:y.y.y.y/z tap(4)'s address is x.x.x.x
1026 * pseudo netif's address is y.y.y.y
1027 * tap(4) and pseudo netif's netmask len are z
1029 * 5) bridgeX tap(4) will be added to bridgeX
1031 * 6) bridgeX:y.y.y.y tap(4) will be added to bridgeX
1032 * pseudo netif's address is y.y.y.y
1034 * 7) bridgeX:y.y.y.y/z tap(4) will be added to bridgeX
1035 * pseudo netif's address is y.y.y.y
1036 * pseudo netif's netmask len is z
1040 netif_init_tap(int tap_unit, in_addr_t *addr, in_addr_t *mask, int s)
1042 in_addr_t tap_addr, netmask, netif_addr;
1043 int next_netif_addr;
1044 char *tok, *masklen_str, *ifbridge;
1049 tok = strtok(NULL, ":/");
1052 * Nothing special, simply use tap(4) as backend
1057 if (inet_pton(AF_INET, tok, &tap_addr) > 0) {
1059 * tap(4)'s address is supplied
1064 * If there is next token, then it may be pseudo
1065 * netif's address or netmask len for tap(4)
1067 next_netif_addr = 0;
1070 * Not tap(4)'s address, assume it as a bridge(4)
1077 * If there is next token, then it must be pseudo
1080 next_netif_addr = 1;
1083 netmask = netif_addr = 0;
1085 tok = strtok(NULL, ":/");
1089 if (inet_pton(AF_INET, tok, &netif_addr) <= 0) {
1090 if (next_netif_addr) {
1091 warnx("Invalid pseudo netif address: %s", tok);
1097 * Current token is not address, then it must be netmask len
1102 * Current token is pseudo netif address, if there is next token
1103 * it must be netmask len
1105 masklen_str = strtok(NULL, "/");
1108 /* Calculate netmask */
1109 if (masklen_str != NULL) {
1112 masklen = strtoul(masklen_str, NULL, 10);
1113 if (masklen < 32 && masklen > 0) {
1114 netmask = htonl(~((1LL << (32 - masklen)) - 1)
1117 warnx("Invalid netmask len: %lu", masklen);
1122 /* Make sure there is no more token left */
1123 if (strtok(NULL, ":/") != NULL) {
1124 warnx("Invalid argument to '-I'");
1131 } else if (ifbridge == NULL) {
1132 /* Set tap(4) address/netmask */
1133 if (netif_set_tapaddr(tap_unit, tap_addr, netmask, s) < 0)
1136 /* Tie tap(4) to bridge(4) */
1137 if (netif_add_tap2brg(tap_unit, ifbridge, s) < 0)
1147 * NetifInfo[] will be filled for pseudo netif initialization.
1148 * NetifNum will be bumped to reflect the number of valid entries
1153 init_netif(char *netifExp[], int netifExpNum)
1157 if (netifExpNum == 0)
1160 s = socket(AF_INET, SOCK_DGRAM, 0); /* for ioctl(SIOC) */
1164 for (i = 0; i < netifExpNum; ++i) {
1165 struct vknetif_info *info;
1166 in_addr_t netif_addr, netif_mask;
1167 int tap_fd, tap_unit;
1170 netif = strtok(netifExp[i], ":");
1171 if (netif == NULL) {
1172 warnx("Invalid argument to '-I'");
1177 * Open tap(4) device file and bring up the
1178 * corresponding interface
1180 tap_fd = netif_open_tap(netif, &tap_unit, s);
1185 * Initialize tap(4) and get address/netmask
1188 * NB: Rest part of netifExp[i] is passed
1189 * to netif_init_tap() implicitly.
1191 if (netif_init_tap(tap_unit, &netif_addr, &netif_mask, s) < 0) {
1193 * NB: Closing tap(4) device file will bring
1194 * down the corresponding interface
1200 info = &NetifInfo[NetifNum];
1201 info->tap_fd = tap_fd;
1202 info->tap_unit = tap_unit;
1203 info->netif_addr = netif_addr;
1204 info->netif_mask = netif_mask;
1207 if (NetifNum >= VKNETIF_MAX) /* XXX will this happen? */
1220 if (pid_file != NULL) {
1222 fp = fopen(pid_file, "w");
1225 fprintf(fp, "%ld\n", (long)self);
1229 perror("Warning: couldn't open pidfile");
1238 if (pid_file != NULL) {
1239 if ( unlink(pid_file) != 0 )
1240 perror("Warning: couldn't remove pidfile");
1246 usage(const char *ctl, ...)
1251 vfprintf(stderr, ctl, va);
1253 fprintf(stderr, "\n");
1260 kprintf("cpu reset, rebooting vkernel\n");
1263 execv(save_av[0], save_av);
1269 kprintf("cpu halt, exiting vkernel\n");
1277 switch(lwp_cpu_lock) {
1280 kprintf("Locking CPU%d to real cpu %d\n",
1282 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu));
1284 if (next_cpu >= real_ncpus)
1287 case LCL_SINGLE_CPU:
1289 kprintf("Locking CPU%d to real cpu %d\n",
1291 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu));
1294 /* do not map virtual cpus to real cpus */