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>
55 #include <sys/mplock2.h>
57 #include <machine/cpu.h>
58 #include <machine/globaldata.h>
59 #include <machine/tls.h>
60 #include <machine/md_var.h>
61 #include <machine/vmparam.h>
62 #include <cpu/specialreg.h>
65 #include <net/if_arp.h>
66 #include <net/ethernet.h>
67 #include <net/bridge/if_bridgevar.h>
68 #include <netinet/in.h>
69 #include <arpa/inet.h>
83 vm_paddr_t phys_avail[16];
85 vm_paddr_t Maxmem_bytes;
88 struct vkdisk_info DiskInfo[VKDISK_MAX];
90 struct vknetif_info NetifInfo[VKNETIF_MAX];
96 vm_offset_t virtual_start;
97 vm_offset_t virtual_end;
98 vm_offset_t virtual2_start;
99 vm_offset_t virtual2_end;
100 vm_offset_t kernel_vm_end;
101 vm_offset_t crashdumpmap;
102 vm_offset_t clean_sva;
103 vm_offset_t clean_eva;
104 struct msgbuf *msgbufp;
107 vpte_t *KernelPTA; /* Warning: Offset for direct VA translation */
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 */
115 int vkernel_b_arg; /* -b argument - no of logical CPU bits - only SMP */
116 int vkernel_B_arg; /* -B argument - no of core bits - only SMP */
118 int via_feature_xcrypt = 0; /* XXX */
119 int via_feature_rng = 0; /* XXX */
121 struct privatespace *CPU_prvspace;
123 static struct trapframe proc0_tf;
124 static void *proc0paddr;
126 static void init_sys_memory(char *imageFile);
127 static void init_kern_memory(void);
128 static void init_globaldata(void);
129 static void init_vkernel(void);
130 static void init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type);
131 static void init_netif(char *netifExp[], int netifFileNum);
132 static void writepid(void);
133 static void cleanpid(void);
134 static int unix_connect(const char *path);
135 static void usage_err(const char *ctl, ...);
136 static void usage_help(_Bool);
139 static char **save_av;
142 * Kernel startup for virtual kernels - standard main()
145 main(int ac, char **av)
147 char *memImageFile = NULL;
148 char *netifFile[VKNETIF_MAX];
149 char *diskFile[VKDISK_MAX];
150 char *cdFile[VKDISK_MAX];
155 int netifFileNum = 0;
158 int bootOnDisk = -1; /* set below to vcd (0) or vkd (1) */
166 int real_vkernel_enable;
181 kernel_mem_readonly = 1;
187 lwp_cpu_lock = LCL_NONE;
189 real_vkernel_enable = 0;
190 vsize = sizeof(real_vkernel_enable);
191 sysctlbyname("vm.vkernel_enable", &real_vkernel_enable, &vsize, NULL,0);
193 if (real_vkernel_enable == 0) {
194 errx(1, "vm.vkernel_enable is 0, must be set "
195 "to 1 to execute a vkernel!");
199 vsize = sizeof(real_ncpus);
200 sysctlbyname("hw.ncpu", &real_ncpus, &vsize, NULL, 0);
205 while ((c = getopt(ac, av, "c:hsvl:m:n:r:e:i:p:I:Ub:B:")) != -1) {
209 * name=value:name=value:name=value...
212 * Allow values to be quoted but note that shells
213 * may remove the quotes, so using this feature
214 * to embed colons may require a backslash.
221 kern_envp = malloc(kenv_size);
222 if (kern_envp == NULL)
223 errx(1, "Couldn't allocate %zd bytes for kern_envp", kenv_size);
225 kenv_size2 = kenv_size + n + 1;
227 if ((tmp = realloc(kern_envp, kenv_size2)) == NULL)
228 errx(1, "Couldn't reallocate %zd bytes for kern_envp", kenv_size2);
230 kenv_size = kenv_size2;
233 for (i = 0, j = pos; i < n; ++i) {
234 if (optarg[i] == '"')
236 else if (optarg[i] == '\'')
238 else if (isq == 0 && optarg[i] == ':')
241 kern_envp[j++] = optarg[i];
248 boothowto |= RB_SINGLE;
254 memImageFile = optarg;
257 if (netifFileNum < VKNETIF_MAX)
258 netifFile[netifFileNum++] = strdup(optarg);
263 if (diskFileNum + cdFileNum < VKDISK_MAX)
264 diskFile[diskFileNum++] = strdup(optarg);
269 if (diskFileNum + cdFileNum < VKDISK_MAX)
270 cdFile[cdFileNum++] = strdup(optarg);
273 Maxmem_bytes = strtoull(optarg, &suffix, 0);
290 usage_err("Bad maxmem option");
298 if (strncmp("map", optarg, 3) == 0) {
299 lwp_cpu_lock = LCL_PER_CPU;
300 if (optarg[3] == ',') {
301 next_cpu = strtol(optarg+4, &endp, 0);
303 usage_err("Bad target CPU number at '%s'", endp);
307 if (next_cpu < 0 || next_cpu > real_ncpus - 1)
308 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1);
309 } else if (strncmp("any", optarg, 3) == 0) {
310 lwp_cpu_lock = LCL_NONE;
312 lwp_cpu_lock = LCL_SINGLE_CPU;
313 next_cpu = strtol(optarg, &endp, 0);
315 usage_err("Bad target CPU number at '%s'", endp);
316 if (next_cpu < 0 || next_cpu > real_ncpus - 1)
317 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1);
322 * This value is set up by mp_start(), don't just
325 tok = strtok(optarg, ":");
327 optcpus = strtol(tok, NULL, 0);
328 if (optcpus < 1 || optcpus > MAXCPU)
329 usage_err("Bad ncpus, valid range is 1-%d", MAXCPU);
331 /* :core_bits argument */
332 tok = strtok(NULL, ":");
334 vkernel_b_arg = strtol(tok, NULL, 0);
336 /* :logical_CPU_bits argument */
337 tok = strtok(NULL, ":");
339 vkernel_B_arg = strtol(tok, NULL, 0);
345 if (strtol(tok, NULL, 0) != 1) {
346 usage_err("You built a UP vkernel, only 1 cpu!");
349 /* :logical_CPU_bits argument */
350 tok = strtok(NULL, ":");
352 usage_err("You built a UP vkernel. No CPU topology available");
354 /* :core_bits argument */
355 tok = strtok(NULL, ":");
357 usage_err("You built a UP vkernel. No CPU topology available");
367 kernel_mem_readonly = 0;
379 init_sys_memory(memImageFile);
391 vsize = sizeof(tsc_present);
392 sysctlbyname("hw.tsc_present", &tsc_present, &vsize, NULL, 0);
393 vsize = sizeof(tsc_frequency);
394 sysctlbyname("hw.tsc_frequency", &tsc_frequency, &vsize, NULL, 0);
396 cpu_feature |= CPUID_TSC;
401 vsize = sizeof(supports_sse);
403 sysctlbyname("hw.instruction_sse", &supports_sse, &vsize, NULL, 0);
404 init_fpu(supports_sse);
406 cpu_feature |= CPUID_SSE | CPUID_FXSR;
409 * We boot from the first installed disk.
411 if (bootOnDisk == 1) {
412 init_disk(diskFile, diskFileNum, VKD_DISK);
413 init_disk(cdFile, cdFileNum, VKD_CD);
415 init_disk(cdFile, cdFileNum, VKD_CD);
416 init_disk(diskFile, diskFileNum, VKD_DISK);
418 init_netif(netifFile, netifFileNum);
426 * Initialize system memory. This is the virtual kernel's 'RAM'.
430 init_sys_memory(char *imageFile)
437 * Figure out the system memory image size. If an image file was
438 * specified and -m was not specified, use the image file's size.
440 if (imageFile && stat(imageFile, &st) == 0 && Maxmem_bytes == 0)
441 Maxmem_bytes = (vm_paddr_t)st.st_size;
442 if ((imageFile == NULL || stat(imageFile, &st) < 0) &&
444 errx(1, "Cannot create new memory file %s unless "
445 "system memory size is specified with -m",
451 * Maxmem must be known at this time
453 if (Maxmem_bytes < 32 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) {
454 errx(1, "Bad maxmem specification: 32MB minimum, "
455 "multiples of %dMB only",
456 SEG_SIZE / 1024 / 1024);
461 * Generate an image file name if necessary, then open/create the
462 * file exclusively locked. Do not allow multiple virtual kernels
463 * to use the same image file.
465 * Don't iterate through a million files if we do not have write
466 * access to the directory, stop if our open() failed on a
467 * non-existant file. Otherwise opens can fail for any number
468 * of reasons (lock failed, file not owned or writable by us, etc).
470 if (imageFile == NULL) {
471 for (i = 0; i < 1000000; ++i) {
472 asprintf(&imageFile, "/var/vkernel/memimg.%06d", i);
474 O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644);
475 if (fd < 0 && stat(imageFile, &st) == 0) {
482 fd = open(imageFile, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644);
484 printf("Using memory file: %s\n", imageFile);
485 if (fd < 0 || fstat(fd, &st) < 0) {
486 err(1, "Unable to open/create %s", imageFile);
491 * Truncate or extend the file as necessary. Clean out the contents
492 * of the file, we want it to be full of holes so we don't waste
493 * time reading in data from an old file that we no longer care
497 ftruncate(fd, Maxmem_bytes);
500 Maxmem = Maxmem_bytes >> PAGE_SHIFT;
505 * Initialize kernel memory. This reserves kernel virtual memory by using
511 init_kern_memory(void)
517 char *topofstack = &dummy;
522 * Memory map our kernel virtual memory space. Note that the
523 * kernel image itself is not made part of this memory for the
526 * The memory map must be segment-aligned so we can properly
529 * If the system kernel has a different MAXDSIZ, it might not
530 * be possible to map kernel memory in its prefered location.
531 * Try a number of different locations.
533 try = (void *)0x40000000;
535 while ((char *)try + KERNEL_KVA_SIZE < topofstack) {
536 base = mmap(try, KERNEL_KVA_SIZE, PROT_READ|PROT_WRITE,
537 MAP_FILE|MAP_SHARED|MAP_VPAGETABLE,
541 if (base != MAP_FAILED)
542 munmap(base, KERNEL_KVA_SIZE);
543 try = (char *)try + 0x10000000;
546 err(1, "Unable to mmap() kernel virtual memory!");
549 madvise(base, KERNEL_KVA_SIZE, MADV_NOSYNC);
550 KvaStart = (vm_offset_t)base;
551 KvaSize = KERNEL_KVA_SIZE;
552 KvaEnd = KvaStart + KvaSize;
554 /* cannot use kprintf yet */
555 printf("KVM mapped at %p-%p\n", (void *)KvaStart, (void *)KvaEnd);
558 * Create a top-level page table self-mapping itself.
560 * Initialize the page directory at physical page index 0 to point
561 * to an array of page table pages starting at physical page index 1
563 lseek(MemImageFd, 0L, 0);
564 for (i = 0; i < KERNEL_KVA_SIZE / SEG_SIZE; ++i) {
565 pte = ((i + 1) * PAGE_SIZE) | VPTE_V | VPTE_R | VPTE_W;
566 write(MemImageFd, &pte, sizeof(pte));
570 * Initialize the PTEs in the page table pages required to map the
571 * page table itself. This includes mapping the page directory page
572 * at the base so we go one more loop then normal.
574 lseek(MemImageFd, PAGE_SIZE, 0);
575 for (i = 0; i <= KERNEL_KVA_SIZE / SEG_SIZE * sizeof(vpte_t); ++i) {
576 pte = (i * PAGE_SIZE) | VPTE_V | VPTE_R | VPTE_W;
577 write(MemImageFd, &pte, sizeof(pte));
581 * Initialize remaining PTEs to 0. We may be reusing a memory image
582 * file. This is approximately a megabyte.
584 i = (KERNEL_KVA_SIZE / PAGE_SIZE - i) * sizeof(pte);
585 zero = malloc(PAGE_SIZE);
586 bzero(zero, PAGE_SIZE);
588 write(MemImageFd, zero, (i > PAGE_SIZE) ? PAGE_SIZE : i);
589 i = i - ((i > PAGE_SIZE) ? PAGE_SIZE : i);
594 * Enable the page table and calculate pointers to our self-map
595 * for easy kernel page table manipulation.
597 * KernelPTA must be offset so we can do direct VA translations
599 mcontrol(base, KERNEL_KVA_SIZE, MADV_SETMAP,
600 0 | VPTE_R | VPTE_W | VPTE_V);
601 KernelPTD = (vpte_t *)base; /* pg directory */
602 KernelPTA = (vpte_t *)((char *)base + PAGE_SIZE); /* pg table pages */
603 KernelPTA -= KvaStart >> PAGE_SHIFT;
606 * phys_avail[] represents unallocated physical memory. MI code
607 * will use phys_avail[] to create the vm_page array.
609 phys_avail[0] = PAGE_SIZE +
610 KERNEL_KVA_SIZE / PAGE_SIZE * sizeof(vpte_t);
611 phys_avail[0] = (phys_avail[0] + PAGE_MASK) & ~(vm_paddr_t)PAGE_MASK;
612 phys_avail[1] = Maxmem_bytes;
615 * (virtual_start, virtual_end) represent unallocated kernel virtual
616 * memory. MI code will create kernel_map using these parameters.
618 virtual_start = KvaStart + PAGE_SIZE +
619 KERNEL_KVA_SIZE / PAGE_SIZE * sizeof(vpte_t);
620 virtual_start = (virtual_start + PAGE_MASK) & ~(vm_offset_t)PAGE_MASK;
621 virtual_end = KvaStart + KERNEL_KVA_SIZE;
624 * kernel_vm_end could be set to virtual_end but we want some
625 * indication of how much of the kernel_map we've used, so
626 * set it low and let pmap_growkernel increase it even though we
627 * don't need to create any new page table pages.
629 kernel_vm_end = virtual_start;
632 * Allocate space for process 0's UAREA.
634 proc0paddr = (void *)virtual_start;
635 for (i = 0; i < UPAGES; ++i) {
636 pmap_kenter_quick(virtual_start, phys_avail[0]);
637 virtual_start += PAGE_SIZE;
638 phys_avail[0] += PAGE_SIZE;
644 crashdumpmap = virtual_start;
645 virtual_start += MAXDUMPPGS * PAGE_SIZE;
648 * msgbufp maps the system message buffer
650 assert((MSGBUF_SIZE & PAGE_MASK) == 0);
651 msgbufp = (void *)virtual_start;
652 for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) {
653 pmap_kenter_quick(virtual_start, phys_avail[0]);
654 virtual_start += PAGE_SIZE;
655 phys_avail[0] += PAGE_SIZE;
657 msgbufinit(msgbufp, MSGBUF_SIZE);
660 * used by kern_memio for /dev/mem access
662 ptvmmap = (caddr_t)virtual_start;
663 virtual_start += PAGE_SIZE;
666 * Bootstrap the kernel_pmap
672 * Map the per-cpu globaldata for cpu #0. Allocate the space using
673 * virtual_start and phys_avail[0]
677 init_globaldata(void)
684 * Reserve enough KVA to cover possible cpus. This is a considerable
685 * amount of KVA since the privatespace structure includes two
686 * whole page table mappings.
688 virtual_start = (virtual_start + SEG_MASK) & ~(vm_offset_t)SEG_MASK;
689 CPU_prvspace = (void *)virtual_start;
690 virtual_start += sizeof(struct privatespace) * SMP_MAXCPU;
693 * Allocate enough physical memory to cover the mdglobaldata
694 * portion of the space and the idle stack and map the pages
695 * into KVA. For cpu #0 only.
697 for (i = 0; i < sizeof(struct mdglobaldata); i += PAGE_SIZE) {
699 va = (vm_offset_t)&CPU_prvspace[0].mdglobaldata + i;
700 pmap_kenter_quick(va, pa);
701 phys_avail[0] += PAGE_SIZE;
703 for (i = 0; i < sizeof(CPU_prvspace[0].idlestack); i += PAGE_SIZE) {
705 va = (vm_offset_t)&CPU_prvspace[0].idlestack + i;
706 pmap_kenter_quick(va, pa);
707 phys_avail[0] += PAGE_SIZE;
711 * Setup the %fs for cpu #0. The mycpu macro works after this
712 * point. Note that %gs is used by pthreads.
714 tls_set_fs(&CPU_prvspace[0], sizeof(struct privatespace));
718 * Initialize very low level systems including thread0, proc0, etc.
724 struct mdglobaldata *gd;
726 gd = &CPU_prvspace[0].mdglobaldata;
727 bzero(gd, sizeof(*gd));
729 gd->mi.gd_curthread = &thread0;
730 thread0.td_gd = &gd->mi;
732 ncpus2 = 1; /* rounded down power of 2 */
733 ncpus_fit = 1; /* rounded up power of 2 */
734 /* ncpus2_mask and ncpus_fit_mask are 0 */
736 gd->mi.gd_prvspace = &CPU_prvspace[0];
737 mi_gdinit(&gd->mi, 0);
739 mi_proc0init(&gd->mi, proc0paddr);
740 lwp0.lwp_md.md_regs = &proc0_tf;
745 * Get the initial mplock with a count of 1 for the BSP.
746 * This uses a LOGICAL cpu ID, ie BSP == 0.
748 cpu_get_initial_mplock();
752 #if 0 /* #ifdef DDB */
754 if (boothowto & RB_KDB)
755 Debugger("Boot flags requested debugger");
759 initializecpu(); /* Initialize CPU registers */
761 init_param2((phys_avail[1] - phys_avail[0]) / PAGE_SIZE);
765 * Map the message buffer
767 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE)
768 pmap_kenter((vm_offset_t)msgbufp + off, avail_end + off);
769 msgbufinit(msgbufp, MSGBUF_SIZE);
772 thread0.td_pcb_cr3 ... MMU
773 lwp0.lwp_md.md_regs = &proc0_tf;
778 * Filesystem image paths for the virtual kernel are optional.
779 * If specified they each should point to a disk image,
780 * the first of which will become the root disk.
782 * The virtual kernel caches data from our 'disk' just like a normal kernel,
783 * so we do not really want the real kernel to cache the data too. Use
784 * O_DIRECT to remove the duplication.
788 init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type)
792 if (diskFileNum == 0)
795 for(i=0; i < diskFileNum; i++){
800 warnx("Invalid argument to '-r'");
804 if (DiskNum < VKDISK_MAX) {
806 struct vkdisk_info* info = NULL;
810 if (type == VKD_DISK)
811 fd = open(fname, O_RDWR|O_DIRECT, 0644);
813 fd = open(fname, O_RDONLY|O_DIRECT, 0644);
814 if (fd < 0 || fstat(fd, &st) < 0) {
815 err(1, "Unable to open/create %s", fname);
818 if (S_ISREG(st.st_mode)) {
819 if (flock(fd, LOCK_EX|LOCK_NB) < 0) {
820 errx(1, "Disk image %s is already "
826 info = &DiskInfo[DiskNum];
832 memcpy(info->fname, fname, l);
835 if (type == VKD_CD) {
836 rootdevnames[0] = "cd9660:vcd0a";
837 } else if (type == VKD_DISK) {
838 rootdevnames[0] = "ufs:vkd0s0a";
839 rootdevnames[1] = "ufs:vkd0s1a";
845 warnx("vkd%d (%s) > VKDISK_MAX", DiskNum, fname);
853 netif_set_tapflags(int tap_unit, int f, int s)
858 bzero(&ifr, sizeof(ifr));
860 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit);
861 if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) {
862 warn("tap%d: ioctl(SIOCGIFFLAGS) failed", tap_unit);
869 * If the flags are already set/cleared, then we return
870 * immediately to avoid extra syscalls
872 flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16);
876 if ((flags & f) == 0)
887 * Fix up ifreq.ifr_name, since it may be trashed
888 * in previous ioctl(SIOCGIFFLAGS)
890 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit);
892 ifr.ifr_flags = flags & 0xffff;
893 ifr.ifr_flagshigh = flags >> 16;
894 if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) {
895 warn("tap%d: ioctl(SIOCSIFFLAGS) failed", tap_unit);
903 netif_set_tapaddr(int tap_unit, in_addr_t addr, in_addr_t mask, int s)
905 struct ifaliasreq ifra;
906 struct sockaddr_in *in;
908 bzero(&ifra, sizeof(ifra));
909 snprintf(ifra.ifra_name, sizeof(ifra.ifra_name), "tap%d", tap_unit);
912 in = (struct sockaddr_in *)&ifra.ifra_addr;
913 in->sin_family = AF_INET;
914 in->sin_len = sizeof(*in);
915 in->sin_addr.s_addr = addr;
919 in = (struct sockaddr_in *)&ifra.ifra_mask;
920 in->sin_len = sizeof(*in);
921 in->sin_addr.s_addr = mask;
924 if (ioctl(s, SIOCAIFADDR, &ifra) < 0) {
925 warn("tap%d: ioctl(SIOCAIFADDR) failed", tap_unit);
933 netif_add_tap2brg(int tap_unit, const char *ifbridge, int s)
938 bzero(&ifbr, sizeof(ifbr));
939 snprintf(ifbr.ifbr_ifsname, sizeof(ifbr.ifbr_ifsname),
942 bzero(&ifd, sizeof(ifd));
943 strlcpy(ifd.ifd_name, ifbridge, sizeof(ifd.ifd_name));
944 ifd.ifd_cmd = BRDGADD;
945 ifd.ifd_len = sizeof(ifbr);
946 ifd.ifd_data = &ifbr;
948 if (ioctl(s, SIOCSDRVSPEC, &ifd) < 0) {
950 * 'errno == EEXIST' means that the tap(4) is already
951 * a member of the bridge(4)
953 if (errno != EEXIST) {
954 warn("ioctl(%s, SIOCSDRVSPEC) failed", ifbridge);
961 #define TAPDEV_OFLAGS (O_RDWR | O_NONBLOCK)
964 * Locate the first unused tap(4) device file if auto mode is requested,
965 * or open the user supplied device file, and bring up the corresponding
968 * NOTE: Only tap(4) device file is supported currently
972 netif_open_tap(const char *netif, int *tap_unit, int s)
974 char tap_dev[MAXPATHLEN];
981 if (strcmp(netif, "auto") == 0) {
983 * Find first unused tap(4) device file
985 tap_fd = open("/dev/tap", TAPDEV_OFLAGS);
987 warnc(errno, "Unable to find a free tap(4)");
992 * User supplied tap(4) device file or unix socket.
994 if (netif[0] == '/') /* Absolute path */
995 strlcpy(tap_dev, netif, sizeof(tap_dev));
997 snprintf(tap_dev, sizeof(tap_dev), "/dev/%s", netif);
999 tap_fd = open(tap_dev, TAPDEV_OFLAGS);
1002 * If we cannot open normally try to connect to it.
1005 tap_fd = unix_connect(tap_dev);
1008 warn("Unable to open %s", tap_dev);
1014 * Check whether the device file is a tap(4)
1016 if (fstat(tap_fd, &st) < 0) {
1018 } else if (S_ISCHR(st.st_mode)) {
1019 dname = fdevname(tap_fd);
1021 dname = strstr(dname, "tap");
1024 * Bring up the corresponding tap(4) interface
1026 *tap_unit = strtol(dname + 3, NULL, 10);
1027 printf("TAP UNIT %d\n", *tap_unit);
1028 if (netif_set_tapflags(*tap_unit, IFF_UP, s) == 0)
1035 } else if (S_ISSOCK(st.st_mode)) {
1037 * Special socket connection (typically to vknet). We
1038 * do not have to do anything.
1046 warnx("%s is not a tap(4) device or socket", tap_dev);
1055 unix_connect(const char *path)
1057 struct sockaddr_un sunx;
1060 int sndbuf = 262144;
1063 snprintf(sunx.sun_path, sizeof(sunx.sun_path), "%s", path);
1064 len = offsetof(struct sockaddr_un, sun_path[strlen(sunx.sun_path)]);
1065 ++len; /* include nul */
1066 sunx.sun_family = AF_UNIX;
1069 net_fd = socket(AF_UNIX, SOCK_SEQPACKET, 0);
1072 if (connect(net_fd, (void *)&sunx, len) < 0) {
1076 setsockopt(net_fd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(sndbuf));
1077 if (fstat(net_fd, &st) == 0)
1078 printf("Network socket buffer: %d bytes\n", st.st_blksize);
1079 fcntl(net_fd, F_SETFL, O_NONBLOCK);
1085 #undef TAPDEV_OFLAGS
1088 * Following syntax is supported,
1089 * 1) x.x.x.x tap(4)'s address is x.x.x.x
1091 * 2) x.x.x.x/z tap(4)'s address is x.x.x.x
1092 * tap(4)'s netmask len is z
1094 * 3) x.x.x.x:y.y.y.y tap(4)'s address is x.x.x.x
1095 * pseudo netif's address is y.y.y.y
1097 * 4) x.x.x.x:y.y.y.y/z tap(4)'s address is x.x.x.x
1098 * pseudo netif's address is y.y.y.y
1099 * tap(4) and pseudo netif's netmask len are z
1101 * 5) bridgeX tap(4) will be added to bridgeX
1103 * 6) bridgeX:y.y.y.y tap(4) will be added to bridgeX
1104 * pseudo netif's address is y.y.y.y
1106 * 7) bridgeX:y.y.y.y/z tap(4) will be added to bridgeX
1107 * pseudo netif's address is y.y.y.y
1108 * pseudo netif's netmask len is z
1112 netif_init_tap(int tap_unit, in_addr_t *addr, in_addr_t *mask, int s)
1114 in_addr_t tap_addr, netmask, netif_addr;
1115 int next_netif_addr;
1116 char *tok, *masklen_str, *ifbridge;
1121 tok = strtok(NULL, ":/");
1124 * Nothing special, simply use tap(4) as backend
1129 if (inet_pton(AF_INET, tok, &tap_addr) > 0) {
1131 * tap(4)'s address is supplied
1136 * If there is next token, then it may be pseudo
1137 * netif's address or netmask len for tap(4)
1139 next_netif_addr = 0;
1142 * Not tap(4)'s address, assume it as a bridge(4)
1149 * If there is next token, then it must be pseudo
1152 next_netif_addr = 1;
1155 netmask = netif_addr = 0;
1157 tok = strtok(NULL, ":/");
1161 if (inet_pton(AF_INET, tok, &netif_addr) <= 0) {
1162 if (next_netif_addr) {
1163 warnx("Invalid pseudo netif address: %s", tok);
1169 * Current token is not address, then it must be netmask len
1174 * Current token is pseudo netif address, if there is next token
1175 * it must be netmask len
1177 masklen_str = strtok(NULL, "/");
1180 /* Calculate netmask */
1181 if (masklen_str != NULL) {
1184 masklen = strtoul(masklen_str, NULL, 10);
1185 if (masklen < 32 && masklen > 0) {
1186 netmask = htonl(~((1LL << (32 - masklen)) - 1)
1189 warnx("Invalid netmask len: %lu", masklen);
1194 /* Make sure there is no more token left */
1195 if (strtok(NULL, ":/") != NULL) {
1196 warnx("Invalid argument to '-I'");
1203 } else if (ifbridge == NULL) {
1204 /* Set tap(4) address/netmask */
1205 if (netif_set_tapaddr(tap_unit, tap_addr, netmask, s) < 0)
1208 /* Tie tap(4) to bridge(4) */
1209 if (netif_add_tap2brg(tap_unit, ifbridge, s) < 0)
1219 * NetifInfo[] will be filled for pseudo netif initialization.
1220 * NetifNum will be bumped to reflect the number of valid entries
1225 init_netif(char *netifExp[], int netifExpNum)
1229 if (netifExpNum == 0)
1232 s = socket(AF_INET, SOCK_DGRAM, 0); /* for ioctl(SIOC) */
1236 for (i = 0; i < netifExpNum; ++i) {
1237 struct vknetif_info *info;
1238 in_addr_t netif_addr, netif_mask;
1239 int tap_fd, tap_unit;
1242 netif = strtok(netifExp[i], ":");
1243 if (netif == NULL) {
1244 warnx("Invalid argument to '-I'");
1249 * Open tap(4) device file and bring up the
1250 * corresponding interface
1252 tap_fd = netif_open_tap(netif, &tap_unit, s);
1257 * Initialize tap(4) and get address/netmask
1260 * NB: Rest part of netifExp[i] is passed
1261 * to netif_init_tap() implicitly.
1263 if (netif_init_tap(tap_unit, &netif_addr, &netif_mask, s) < 0) {
1265 * NB: Closing tap(4) device file will bring
1266 * down the corresponding interface
1272 info = &NetifInfo[NetifNum];
1273 info->tap_fd = tap_fd;
1274 info->tap_unit = tap_unit;
1275 info->netif_addr = netif_addr;
1276 info->netif_mask = netif_mask;
1279 if (NetifNum >= VKNETIF_MAX) /* XXX will this happen? */
1286 * Create the pid file and leave it open and locked while the vkernel is
1287 * running. This allows a script to use /usr/bin/lockf to probe whether
1288 * a vkernel is still running (so as not to accidently kill an unrelated
1289 * process from a stale pid file).
1298 if (pid_file != NULL) {
1299 snprintf(buf, sizeof(buf), "%ld\n", (long)getpid());
1300 fd = open(pid_file, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0666);
1302 if (errno == EWOULDBLOCK) {
1303 perror("Failed to lock pidfile, "
1304 "vkernel already running");
1306 perror("Failed to create pidfile");
1311 write(fd, buf, strlen(buf));
1312 /* leave the file open to maintain the lock */
1320 if (pid_file != NULL) {
1321 if (unlink(pid_file) < 0)
1322 perror("Warning: couldn't remove pidfile");
1328 usage_err(const char *ctl, ...)
1333 vfprintf(stderr, ctl, va);
1335 fprintf(stderr, "\n");
1341 usage_help(_Bool help)
1343 fprintf(stderr, "Usage: %s [-hsUv] [-c file] [-e name=value:name=value:...]\n"
1344 "\t[-i file] [-I interface[:address1[:address2][/netmask]]] [-l cpulock]\n"
1345 "\t[-m size] [-n numcpus[:lbits[:cbits]]]\n"
1346 "\t[-p file] [-r file]\n", save_av[0]);
1349 fprintf(stderr, "\nArguments:\n"
1350 "\t-c\tSpecify a readonly CD-ROM image file to be used by the kernel.\n"
1351 "\t-e\tSpecify an environment to be used by the kernel.\n"
1352 "\t-h\tThis list of options.\n"
1353 "\t-i\tSpecify a memory image file to be used by the virtual kernel.\n"
1354 "\t-I\tCreate a virtual network device.\n"
1355 "\t-l\tSpecify which, if any, real CPUs to lock virtual CPUs to.\n"
1356 "\t-m\tSpecify the amount of memory to be used by the kernel in bytes.\n"
1357 "\t-n\tSpecify the number of CPUs and the topology you wish to emulate:\n"
1358 "\t \t- numcpus - number of cpus\n"
1359 "\t \t- :lbits - specify the number of bits within APICID(=CPUID) needed for representing\n"
1360 "\t \tthe logical ID. Controls the number of threads/core (0bits - 1 thread, 1bit - 2 threads).\n"
1361 "\t \t- :cbits - specify the number of bits within APICID(=CPUID) needed for representing\n"
1362 "\t \tthe core ID. Controls the number of core/package (0bits - 1 core, 1bit - 2 cores).\n"
1363 "\t-p\tSpecify a file in which to store the process ID.\n"
1364 "\t-r\tSpecify a R/W disk image file to be used by the kernel.\n"
1365 "\t-s\tBoot into single-user mode.\n"
1366 "\t-U\tEnable writing to kernel memory and module loading.\n"
1367 "\t-v\tTurn on verbose booting.\n");
1375 kprintf("cpu reset, rebooting vkernel\n");
1378 execv(save_av[0], save_av);
1384 kprintf("cpu halt, exiting vkernel\n");
1392 switch(lwp_cpu_lock) {
1395 kprintf("Locking CPU%d to real cpu %d\n",
1397 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu));
1399 if (next_cpu >= real_ncpus)
1402 case LCL_SINGLE_CPU:
1404 kprintf("Locking CPU%d to real cpu %d\n",
1406 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu));
1409 /* do not map virtual cpus to real cpus */