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>
82 vm_paddr_t phys_avail[16];
84 vm_paddr_t Maxmem_bytes;
87 struct vkdisk_info DiskInfo[VKDISK_MAX];
89 struct vknetif_info NetifInfo[VKNETIF_MAX];
95 vm_offset_t virtual_start;
96 vm_offset_t virtual_end;
97 vm_offset_t virtual2_start;
98 vm_offset_t virtual2_end;
99 vm_offset_t kernel_vm_end;
100 vm_offset_t crashdumpmap;
101 vm_offset_t clean_sva;
102 vm_offset_t clean_eva;
103 struct msgbuf *msgbufp;
106 vpte_t *KernelPTA; /* Warning: Offset for direct VA translation */
107 void *dmap_min_address;
108 u_int cpu_feature; /* XXX */
110 int64_t tsc_frequency;
111 int optcpus; /* number of cpus - see mp_start() */
112 int lwp_cpu_lock; /* if/how to lock virtual CPUs to real CPUs */
113 int real_ncpus; /* number of real CPUs */
114 int next_cpu; /* next real CPU to lock a virtual CPU to */
116 struct privatespace *CPU_prvspace;
118 static struct trapframe proc0_tf;
119 static void *proc0paddr;
121 static void init_sys_memory(char *imageFile);
122 static void init_kern_memory(void);
123 static void init_globaldata(void);
124 static void init_vkernel(void);
125 static void init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type);
126 static void init_netif(char *netifExp[], int netifFileNum);
127 static void writepid(void);
128 static void cleanpid(void);
129 static int unix_connect(const char *path);
130 static void usage_err(const char *ctl, ...);
131 static void usage_help(_Bool);
134 static char **save_av;
137 * Kernel startup for virtual kernels - standard main()
140 main(int ac, char **av)
142 char *memImageFile = NULL;
143 char *netifFile[VKNETIF_MAX];
144 char *diskFile[VKDISK_MAX];
145 char *cdFile[VKDISK_MAX];
148 int netifFileNum = 0;
151 int bootOnDisk = -1; /* set below to vcd (0) or vkd (1) */
157 int real_vkernel_enable;
167 kernel_mem_readonly = 1;
171 lwp_cpu_lock = LCL_NONE;
173 real_vkernel_enable = 0;
174 vsize = sizeof(real_vkernel_enable);
175 sysctlbyname("vm.vkernel_enable", &real_vkernel_enable, &vsize, NULL,0);
177 if (real_vkernel_enable == 0) {
178 errx(1, "vm.vkernel_enable is 0, must be set "
179 "to 1 to execute a vkernel!");
183 vsize = sizeof(real_ncpus);
184 sysctlbyname("hw.ncpu", &real_ncpus, &vsize, NULL, 0);
189 while ((c = getopt(ac, av, "c:hsvl:m:n:r:e:i:p:I:U")) != -1) {
193 * name=value:name=value:name=value...
196 * Allow values to be quoted but note that shells
197 * may remove the quotes, so using this feature
198 * to embed colons may require a backslash.
202 kern_envp = malloc(n + 2);
203 for (i = j = 0; i < n; ++i) {
204 if (optarg[i] == '"')
206 else if (optarg[i] == '\'')
208 else if (isq == 0 && optarg[i] == ':')
211 kern_envp[j++] = optarg[i];
217 boothowto |= RB_SINGLE;
223 memImageFile = optarg;
226 if (netifFileNum < VKNETIF_MAX)
227 netifFile[netifFileNum++] = strdup(optarg);
232 if (diskFileNum + cdFileNum < VKDISK_MAX)
233 diskFile[diskFileNum++] = strdup(optarg);
238 if (diskFileNum + cdFileNum < VKDISK_MAX)
239 cdFile[cdFileNum++] = strdup(optarg);
242 Maxmem_bytes = strtoull(optarg, &suffix, 0);
259 usage_err("Bad maxmem option");
267 if (strncmp("map", optarg, 3) == 0) {
268 lwp_cpu_lock = LCL_PER_CPU;
269 if (optarg[3] == ',') {
270 next_cpu = strtol(optarg+4, &endp, 0);
272 usage_err("Bad target CPU number at '%s'", endp);
276 if (next_cpu < 0 || next_cpu > real_ncpus - 1)
277 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1);
278 } else if (strncmp("any", optarg, 3) == 0) {
279 lwp_cpu_lock = LCL_NONE;
281 lwp_cpu_lock = LCL_SINGLE_CPU;
282 next_cpu = strtol(optarg, &endp, 0);
284 usage_err("Bad target CPU number at '%s'", endp);
285 if (next_cpu < 0 || next_cpu > real_ncpus - 1)
286 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1);
291 * This value is set up by mp_start(), don't just
295 optcpus = strtol(optarg, NULL, 0);
296 if (optcpus < 1 || optcpus > MAXCPU)
297 usage_err("Bad ncpus, valid range is 1-%d", MAXCPU);
299 if (strtol(optarg, NULL, 0) != 1) {
300 usage_err("You built a UP vkernel, only 1 cpu!");
309 kernel_mem_readonly = 0;
321 init_sys_memory(memImageFile);
331 vsize = sizeof(tsc_present);
332 sysctlbyname("hw.tsc_present", &tsc_present, &vsize, NULL, 0);
333 vsize = sizeof(tsc_frequency);
334 sysctlbyname("hw.tsc_frequency", &tsc_frequency, &vsize, NULL, 0);
336 cpu_feature |= CPUID_TSC;
341 vsize = sizeof(supports_sse);
343 sysctlbyname("hw.instruction_sse", &supports_sse, &vsize, NULL, 0);
344 init_fpu(supports_sse);
346 cpu_feature |= CPUID_SSE | CPUID_FXSR;
349 * We boot from the first installed disk.
351 if (bootOnDisk == 1) {
352 init_disk(diskFile, diskFileNum, VKD_DISK);
353 init_disk(cdFile, cdFileNum, VKD_CD);
355 init_disk(cdFile, cdFileNum, VKD_CD);
356 init_disk(diskFile, diskFileNum, VKD_DISK);
358 init_netif(netifFile, netifFileNum);
366 * Initialize system memory. This is the virtual kernel's 'RAM'.
370 init_sys_memory(char *imageFile)
377 * Figure out the system memory image size. If an image file was
378 * specified and -m was not specified, use the image file's size.
381 if (imageFile && stat(imageFile, &st) == 0 && Maxmem_bytes == 0)
382 Maxmem_bytes = (vm_paddr_t)st.st_size;
383 if ((imageFile == NULL || stat(imageFile, &st) < 0) &&
385 err(1, "Cannot create new memory file %s unless "
386 "system memory size is specified with -m",
392 * Maxmem must be known at this time
394 if (Maxmem_bytes < 32 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) {
395 err(1, "Bad maxmem specification: 32MB minimum, "
396 "multiples of %dMB only",
397 SEG_SIZE / 1024 / 1024);
402 * Generate an image file name if necessary, then open/create the
403 * file exclusively locked. Do not allow multiple virtual kernels
404 * to use the same image file.
406 if (imageFile == NULL) {
407 for (i = 0; i < 1000000; ++i) {
408 asprintf(&imageFile, "/var/vkernel/memimg.%06d", i);
410 O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644);
411 if (fd < 0 && errno == EWOULDBLOCK) {
418 fd = open(imageFile, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644);
420 fprintf(stderr, "Using memory file: %s\n", imageFile);
421 if (fd < 0 || fstat(fd, &st) < 0) {
422 err(1, "Unable to open/create %s", imageFile);
427 * Truncate or extend the file as necessary. Clean out the contents
428 * of the file, we want it to be full of holes so we don't waste
429 * time reading in data from an old file that we no longer care
433 ftruncate(fd, Maxmem_bytes);
436 Maxmem = Maxmem_bytes >> PAGE_SHIFT;
441 * Initialize kernel memory. This reserves kernel virtual memory by using
447 init_kern_memory(void)
452 char *topofstack = &dummy;
457 * Memory map our kernel virtual memory space. Note that the
458 * kernel image itself is not made part of this memory for the
461 * The memory map must be segment-aligned so we can properly
464 * If the system kernel has a different MAXDSIZ, it might not
465 * be possible to map kernel memory in its prefered location.
466 * Try a number of different locations.
468 try = (void *)(512UL << 30);
470 while ((char *)try + KERNEL_KVA_SIZE < topofstack) {
471 base = mmap(try, KERNEL_KVA_SIZE, PROT_READ|PROT_WRITE,
472 MAP_FILE|MAP_SHARED|MAP_VPAGETABLE,
473 MemImageFd, (off_t)try);
476 if (base != MAP_FAILED)
477 munmap(base, KERNEL_KVA_SIZE);
478 try = (char *)try + (512UL << 30);
481 err(1, "Unable to mmap() kernel virtual memory!");
484 madvise(base, KERNEL_KVA_SIZE, MADV_NOSYNC);
485 KvaStart = (vm_offset_t)base;
486 KvaSize = KERNEL_KVA_SIZE;
487 KvaEnd = KvaStart + KvaSize;
489 /* cannot use kprintf yet */
490 printf("KVM mapped at %p-%p\n", (void *)KvaStart, (void *)KvaEnd);
493 dmap_min_address = mmap(0, DMAP_SIZE, PROT_READ|PROT_WRITE,
494 MAP_NOCORE|MAP_NOSYNC|MAP_SHARED,
496 if (dmap_min_address == MAP_FAILED) {
497 err(1, "Unable to mmap() kernel DMAP region!");
502 pmap_bootstrap((vm_paddr_t *)&firstfree, (int64_t)base);
504 mcontrol(base, KERNEL_KVA_SIZE, MADV_SETMAP,
505 0 | VPTE_R | VPTE_W | VPTE_V);
508 * phys_avail[] represents unallocated physical memory. MI code
509 * will use phys_avail[] to create the vm_page array.
511 phys_avail[0] = (vm_paddr_t)firstfree;
512 phys_avail[0] = (phys_avail[0] + PAGE_MASK) & ~(vm_paddr_t)PAGE_MASK;
513 phys_avail[1] = Maxmem_bytes;
517 * (virtual_start, virtual_end) represent unallocated kernel virtual
518 * memory. MI code will create kernel_map using these parameters.
520 virtual_start = KvaStart + (long)firstfree;
521 virtual_start = (virtual_start + PAGE_MASK) & ~(vm_offset_t)PAGE_MASK;
522 virtual_end = KvaStart + KERNEL_KVA_SIZE;
526 * pmap_growkernel() will set the correct value.
531 * Allocate space for process 0's UAREA.
533 proc0paddr = (void *)virtual_start;
534 for (i = 0; i < UPAGES; ++i) {
535 pmap_kenter_quick(virtual_start, phys_avail[0]);
536 virtual_start += PAGE_SIZE;
537 phys_avail[0] += PAGE_SIZE;
543 crashdumpmap = virtual_start;
544 virtual_start += MAXDUMPPGS * PAGE_SIZE;
547 * msgbufp maps the system message buffer
549 assert((MSGBUF_SIZE & PAGE_MASK) == 0);
550 msgbufp = (void *)virtual_start;
551 for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) {
552 pmap_kenter_quick(virtual_start, phys_avail[0]);
553 virtual_start += PAGE_SIZE;
554 phys_avail[0] += PAGE_SIZE;
556 msgbufinit(msgbufp, MSGBUF_SIZE);
559 * used by kern_memio for /dev/mem access
561 ptvmmap = (caddr_t)virtual_start;
562 virtual_start += PAGE_SIZE;
565 * Bootstrap the kernel_pmap
573 * Map the per-cpu globaldata for cpu #0. Allocate the space using
574 * virtual_start and phys_avail[0]
578 init_globaldata(void)
585 * Reserve enough KVA to cover possible cpus. This is a considerable
586 * amount of KVA since the privatespace structure includes two
587 * whole page table mappings.
589 virtual_start = (virtual_start + SEG_MASK) & ~(vm_offset_t)SEG_MASK;
590 CPU_prvspace = (void *)virtual_start;
591 virtual_start += sizeof(struct privatespace) * SMP_MAXCPU;
594 * Allocate enough physical memory to cover the mdglobaldata
595 * portion of the space and the idle stack and map the pages
596 * into KVA. For cpu #0 only.
598 for (i = 0; i < sizeof(struct mdglobaldata); i += PAGE_SIZE) {
600 va = (vm_offset_t)&CPU_prvspace[0].mdglobaldata + i;
601 pmap_kenter_quick(va, pa);
602 phys_avail[0] += PAGE_SIZE;
604 for (i = 0; i < sizeof(CPU_prvspace[0].idlestack); i += PAGE_SIZE) {
606 va = (vm_offset_t)&CPU_prvspace[0].idlestack + i;
607 pmap_kenter_quick(va, pa);
608 phys_avail[0] += PAGE_SIZE;
612 * Setup the %gs for cpu #0. The mycpu macro works after this
613 * point. Note that %fs is used by pthreads.
615 tls_set_gs(&CPU_prvspace[0], sizeof(struct privatespace));
619 * Initialize very low level systems including thread0, proc0, etc.
625 struct mdglobaldata *gd;
627 gd = &CPU_prvspace[0].mdglobaldata;
628 bzero(gd, sizeof(*gd));
630 gd->mi.gd_curthread = &thread0;
631 thread0.td_gd = &gd->mi;
633 ncpus2 = 1; /* rounded down power of 2 */
634 ncpus_fit = 1; /* rounded up power of 2 */
635 /* ncpus2_mask and ncpus_fit_mask are 0 */
637 gd->mi.gd_prvspace = &CPU_prvspace[0];
638 mi_gdinit(&gd->mi, 0);
640 mi_proc0init(&gd->mi, proc0paddr);
641 lwp0.lwp_md.md_regs = &proc0_tf;
646 #if 0 /* #ifdef DDB */
648 if (boothowto & RB_KDB)
649 Debugger("Boot flags requested debugger");
653 initializecpu(); /* Initialize CPU registers */
655 init_param2((phys_avail[1] - phys_avail[0]) / PAGE_SIZE);
659 * Map the message buffer
661 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE)
662 pmap_kenter((vm_offset_t)msgbufp + off, avail_end + off);
663 msgbufinit(msgbufp, MSGBUF_SIZE);
666 thread0.td_pcb_cr3 ... MMU
667 lwp0.lwp_md.md_regs = &proc0_tf;
672 * Filesystem image paths for the virtual kernel are optional.
673 * If specified they each should point to a disk image,
674 * the first of which will become the root disk.
676 * The virtual kernel caches data from our 'disk' just like a normal kernel,
677 * so we do not really want the real kernel to cache the data too. Use
678 * O_DIRECT to remove the duplication.
682 init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type)
686 if (diskFileNum == 0)
689 for(i=0; i < diskFileNum; i++){
694 warnx("Invalid argument to '-r'");
698 if (DiskNum < VKDISK_MAX) {
700 struct vkdisk_info* info = NULL;
704 if (type == VKD_DISK)
705 fd = open(fname, O_RDWR|O_DIRECT, 0644);
707 fd = open(fname, O_RDONLY|O_DIRECT, 0644);
708 if (fd < 0 || fstat(fd, &st) < 0) {
709 err(1, "Unable to open/create %s", fname);
712 if (S_ISREG(st.st_mode)) {
713 if (flock(fd, LOCK_EX|LOCK_NB) < 0) {
714 errx(1, "Disk image %s is already "
720 info = &DiskInfo[DiskNum];
726 memcpy(info->fname, fname, l);
729 if (type == VKD_CD) {
730 rootdevnames[0] = "cd9660:vcd0a";
731 } else if (type == VKD_DISK) {
732 rootdevnames[0] = "ufs:vkd0s0a";
733 rootdevnames[1] = "ufs:vkd0s1a";
739 warnx("vkd%d (%s) > VKDISK_MAX", DiskNum, fname);
747 netif_set_tapflags(int tap_unit, int f, int s)
752 bzero(&ifr, sizeof(ifr));
754 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit);
755 if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) {
756 warn("tap%d: ioctl(SIOCGIFFLAGS) failed", tap_unit);
763 * If the flags are already set/cleared, then we return
764 * immediately to avoid extra syscalls
766 flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16);
770 if ((flags & f) == 0)
781 * Fix up ifreq.ifr_name, since it may be trashed
782 * in previous ioctl(SIOCGIFFLAGS)
784 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit);
786 ifr.ifr_flags = flags & 0xffff;
787 ifr.ifr_flagshigh = flags >> 16;
788 if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) {
789 warn("tap%d: ioctl(SIOCSIFFLAGS) failed", tap_unit);
797 netif_set_tapaddr(int tap_unit, in_addr_t addr, in_addr_t mask, int s)
799 struct ifaliasreq ifra;
800 struct sockaddr_in *in;
802 bzero(&ifra, sizeof(ifra));
803 snprintf(ifra.ifra_name, sizeof(ifra.ifra_name), "tap%d", tap_unit);
806 in = (struct sockaddr_in *)&ifra.ifra_addr;
807 in->sin_family = AF_INET;
808 in->sin_len = sizeof(*in);
809 in->sin_addr.s_addr = addr;
813 in = (struct sockaddr_in *)&ifra.ifra_mask;
814 in->sin_len = sizeof(*in);
815 in->sin_addr.s_addr = mask;
818 if (ioctl(s, SIOCAIFADDR, &ifra) < 0) {
819 warn("tap%d: ioctl(SIOCAIFADDR) failed", tap_unit);
827 netif_add_tap2brg(int tap_unit, const char *ifbridge, int s)
832 bzero(&ifbr, sizeof(ifbr));
833 snprintf(ifbr.ifbr_ifsname, sizeof(ifbr.ifbr_ifsname),
836 bzero(&ifd, sizeof(ifd));
837 strlcpy(ifd.ifd_name, ifbridge, sizeof(ifd.ifd_name));
838 ifd.ifd_cmd = BRDGADD;
839 ifd.ifd_len = sizeof(ifbr);
840 ifd.ifd_data = &ifbr;
842 if (ioctl(s, SIOCSDRVSPEC, &ifd) < 0) {
844 * 'errno == EEXIST' means that the tap(4) is already
845 * a member of the bridge(4)
847 if (errno != EEXIST) {
848 warn("ioctl(%s, SIOCSDRVSPEC) failed", ifbridge);
855 #define TAPDEV_OFLAGS (O_RDWR | O_NONBLOCK)
858 * Locate the first unused tap(4) device file if auto mode is requested,
859 * or open the user supplied device file, and bring up the corresponding
862 * NOTE: Only tap(4) device file is supported currently
866 netif_open_tap(const char *netif, int *tap_unit, int s)
868 char tap_dev[MAXPATHLEN];
875 if (strcmp(netif, "auto") == 0) {
877 * Find first unused tap(4) device file
879 tap_fd = open("/dev/tap", TAPDEV_OFLAGS);
881 warnc(errno, "Unable to find a free tap(4)");
886 * User supplied tap(4) device file or unix socket.
888 if (netif[0] == '/') /* Absolute path */
889 strlcpy(tap_dev, netif, sizeof(tap_dev));
891 snprintf(tap_dev, sizeof(tap_dev), "/dev/%s", netif);
893 tap_fd = open(tap_dev, TAPDEV_OFLAGS);
896 * If we cannot open normally try to connect to it.
899 tap_fd = unix_connect(tap_dev);
902 warn("Unable to open %s", tap_dev);
908 * Check whether the device file is a tap(4)
910 if (fstat(tap_fd, &st) < 0) {
912 } else if (S_ISCHR(st.st_mode)) {
913 dname = fdevname(tap_fd);
915 dname = strstr(dname, "tap");
918 * Bring up the corresponding tap(4) interface
920 *tap_unit = strtol(dname + 3, NULL, 10);
921 printf("TAP UNIT %d\n", *tap_unit);
922 if (netif_set_tapflags(*tap_unit, IFF_UP, s) == 0)
929 } else if (S_ISSOCK(st.st_mode)) {
931 * Special socket connection (typically to vknet). We
932 * do not have to do anything.
940 warnx("%s is not a tap(4) device or socket", tap_dev);
949 unix_connect(const char *path)
951 struct sockaddr_un sunx;
957 snprintf(sunx.sun_path, sizeof(sunx.sun_path), "%s", path);
958 len = offsetof(struct sockaddr_un, sun_path[strlen(sunx.sun_path)]);
959 ++len; /* include nul */
960 sunx.sun_family = AF_UNIX;
963 net_fd = socket(AF_UNIX, SOCK_SEQPACKET, 0);
966 if (connect(net_fd, (void *)&sunx, len) < 0) {
970 setsockopt(net_fd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(sndbuf));
971 if (fstat(net_fd, &st) == 0)
972 printf("Network socket buffer: %d bytes\n", st.st_blksize);
973 fcntl(net_fd, F_SETFL, O_NONBLOCK);
982 * Following syntax is supported,
983 * 1) x.x.x.x tap(4)'s address is x.x.x.x
985 * 2) x.x.x.x/z tap(4)'s address is x.x.x.x
986 * tap(4)'s netmask len is z
988 * 3) x.x.x.x:y.y.y.y tap(4)'s address is x.x.x.x
989 * pseudo netif's address is y.y.y.y
991 * 4) x.x.x.x:y.y.y.y/z tap(4)'s address is x.x.x.x
992 * pseudo netif's address is y.y.y.y
993 * tap(4) and pseudo netif's netmask len are z
995 * 5) bridgeX tap(4) will be added to bridgeX
997 * 6) bridgeX:y.y.y.y tap(4) will be added to bridgeX
998 * pseudo netif's address is y.y.y.y
1000 * 7) bridgeX:y.y.y.y/z tap(4) will be added to bridgeX
1001 * pseudo netif's address is y.y.y.y
1002 * pseudo netif's netmask len is z
1006 netif_init_tap(int tap_unit, in_addr_t *addr, in_addr_t *mask, int s)
1008 in_addr_t tap_addr, netmask, netif_addr;
1009 int next_netif_addr;
1010 char *tok, *masklen_str, *ifbridge;
1015 tok = strtok(NULL, ":/");
1018 * Nothing special, simply use tap(4) as backend
1023 if (inet_pton(AF_INET, tok, &tap_addr) > 0) {
1025 * tap(4)'s address is supplied
1030 * If there is next token, then it may be pseudo
1031 * netif's address or netmask len for tap(4)
1033 next_netif_addr = 0;
1036 * Not tap(4)'s address, assume it as a bridge(4)
1043 * If there is next token, then it must be pseudo
1046 next_netif_addr = 1;
1049 netmask = netif_addr = 0;
1051 tok = strtok(NULL, ":/");
1055 if (inet_pton(AF_INET, tok, &netif_addr) <= 0) {
1056 if (next_netif_addr) {
1057 warnx("Invalid pseudo netif address: %s", tok);
1063 * Current token is not address, then it must be netmask len
1068 * Current token is pseudo netif address, if there is next token
1069 * it must be netmask len
1071 masklen_str = strtok(NULL, "/");
1074 /* Calculate netmask */
1075 if (masklen_str != NULL) {
1078 masklen = strtoul(masklen_str, NULL, 10);
1079 if (masklen < 32 && masklen > 0) {
1080 netmask = htonl(~((1LL << (32 - masklen)) - 1)
1083 warnx("Invalid netmask len: %lu", masklen);
1088 /* Make sure there is no more token left */
1089 if (strtok(NULL, ":/") != NULL) {
1090 warnx("Invalid argument to '-I'");
1097 } else if (ifbridge == NULL) {
1098 /* Set tap(4) address/netmask */
1099 if (netif_set_tapaddr(tap_unit, tap_addr, netmask, s) < 0)
1102 /* Tie tap(4) to bridge(4) */
1103 if (netif_add_tap2brg(tap_unit, ifbridge, s) < 0)
1113 * NetifInfo[] will be filled for pseudo netif initialization.
1114 * NetifNum will be bumped to reflect the number of valid entries
1119 init_netif(char *netifExp[], int netifExpNum)
1123 if (netifExpNum == 0)
1126 s = socket(AF_INET, SOCK_DGRAM, 0); /* for ioctl(SIOC) */
1130 for (i = 0; i < netifExpNum; ++i) {
1131 struct vknetif_info *info;
1132 in_addr_t netif_addr, netif_mask;
1133 int tap_fd, tap_unit;
1136 netif = strtok(netifExp[i], ":");
1137 if (netif == NULL) {
1138 warnx("Invalid argument to '-I'");
1143 * Open tap(4) device file and bring up the
1144 * corresponding interface
1146 tap_fd = netif_open_tap(netif, &tap_unit, s);
1151 * Initialize tap(4) and get address/netmask
1154 * NB: Rest part of netifExp[i] is passed
1155 * to netif_init_tap() implicitly.
1157 if (netif_init_tap(tap_unit, &netif_addr, &netif_mask, s) < 0) {
1159 * NB: Closing tap(4) device file will bring
1160 * down the corresponding interface
1166 info = &NetifInfo[NetifNum];
1167 info->tap_fd = tap_fd;
1168 info->tap_unit = tap_unit;
1169 info->netif_addr = netif_addr;
1170 info->netif_mask = netif_mask;
1173 if (NetifNum >= VKNETIF_MAX) /* XXX will this happen? */
1186 if (pid_file != NULL) {
1188 fp = fopen(pid_file, "w");
1191 fprintf(fp, "%ld\n", (long)self);
1195 perror("Warning: couldn't open pidfile");
1204 if (pid_file != NULL) {
1205 if ( unlink(pid_file) != 0 )
1206 perror("Warning: couldn't remove pidfile");
1212 usage_err(const char *ctl, ...)
1217 vfprintf(stderr, ctl, va);
1219 fprintf(stderr, "\n");
1225 usage_help(_Bool help)
1227 fprintf(stderr, "Usage: %s [-hsUv] [-c file] [-e name=value:name=value:...]\n"
1228 "\t[-i file] [-I interface[:address1[:address2][/netmask]]] [-l cpulock]\n"
1229 "\t[-m size] [-n numcpus] [-p file] [-r file]\n", save_av[0]);
1232 fprintf(stderr, "\nArguments:\n"
1233 "\t-c\tSpecify a readonly CD-ROM image file to be used by the kernel.\n"
1234 "\t-e\tSpecify an environment to be used by the kernel.\n"
1235 "\t-h\tThis list of options.\n"
1236 "\t-i\tSpecify a memory image file to be used by the virtual kernel.\n"
1237 "\t-I\tCreate a virtual network device.\n"
1238 "\t-l\tSpecify which, if any, real CPUs to lock virtual CPUs to.\n"
1239 "\t-m\tSpecify the amount of memory to be used by the kernel in bytes.\n"
1240 "\t-n\tSpecify the number of CPUs you wish to emulate.\n"
1241 "\t-p\tSpecify a file in which to store the process ID.\n"
1242 "\t-r\tSpecify a R/W disk image file to be used by the kernel.\n"
1243 "\t-s\tBoot into single-user mode.\n"
1244 "\t-U\tEnable writing to kernel memory and module loading.\n"
1245 "\t-v\tTurn on verbose booting.\n");
1253 kprintf("cpu reset, rebooting vkernel\n");
1256 execv(save_av[0], save_av);
1262 kprintf("cpu halt, exiting vkernel\n");
1270 switch(lwp_cpu_lock) {
1273 kprintf("Locking CPU%d to real cpu %d\n",
1275 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu));
1277 if (next_cpu >= real_ncpus)
1280 case LCL_SINGLE_CPU:
1282 kprintf("Locking CPU%d to real cpu %d\n",
1284 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu));
1287 /* do not map virtual cpus to real cpus */