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
35 #include <sys/types.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
41 #include <sys/random.h>
42 #include <sys/vkernel.h>
44 #include <sys/reboot.h>
46 #include <sys/msgbuf.h>
47 #include <sys/vmspace.h>
48 #include <sys/socket.h>
49 #include <sys/sockio.h>
50 #include <sys/sysctl.h>
52 #include <vm/vm_page.h>
53 #include <vm/vm_map.h>
54 #include <sys/mplock2.h>
58 #include <machine/cpu.h>
59 #include <machine/globaldata.h>
60 #include <machine/tls.h>
61 #include <machine/md_var.h>
62 #include <machine/vmparam.h>
63 #include <cpu/specialreg.h>
66 #include <net/if_arp.h>
67 #include <net/ethernet.h>
68 #include <net/bridge/if_bridgevar.h>
69 #include <netinet/in.h>
70 #include <arpa/inet.h>
71 #include <net/if_var.h>
85 #define EX_VKERNEL_REBOOT 32
87 vm_paddr_t phys_avail[16];
89 vm_paddr_t Maxmem_bytes;
92 struct vkdisk_info DiskInfo[VKDISK_MAX];
94 struct vknetif_info NetifInfo[VKNETIF_MAX];
100 vm_offset_t virtual_start;
101 vm_offset_t virtual_end;
102 vm_offset_t virtual2_start;
103 vm_offset_t virtual2_end;
104 vm_offset_t kernel_vm_end;
105 vm_offset_t crashdumpmap;
106 vm_offset_t clean_sva;
107 vm_offset_t clean_eva;
108 struct msgbuf *msgbufp;
111 vpte_t *KernelPTA; /* Warning: Offset for direct VA translation */
112 void *dmap_min_address;
114 u_int cpu_feature; /* XXX */
118 int64_t tsc_frequency;
119 int optcpus; /* number of cpus - see mp_start() */
120 int lwp_cpu_lock; /* if/how to lock virtual CPUs to real CPUs */
121 int real_ncpus; /* number of real CPUs */
122 int next_cpu; /* next real CPU to lock a virtual CPU to */
123 int vkernel_b_arg; /* no of logical CPU bits - only SMP */
124 int vkernel_B_arg; /* no of core bits - only SMP */
125 int vmm_enabled; /* VMM HW assisted enable */
126 struct privatespace *CPU_prvspace;
128 extern uint64_t KPML4phys; /* phys addr of kernel level 4 */
130 static struct trapframe proc0_tf;
131 static void *proc0paddr;
133 static void init_sys_memory(char *imageFile);
134 static void init_kern_memory(void);
135 static void init_kern_memory_vmm(void);
136 static void init_globaldata(void);
137 static void init_vkernel(void);
138 static void init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type);
139 static void init_netif(char *netifExp[], int netifFileNum);
140 static void writepid(void);
141 static void cleanpid(void);
142 static int unix_connect(const char *path);
143 static void usage_err(const char *ctl, ...);
144 static void usage_help(_Bool);
145 static void init_locks(void);
148 static char **save_av;
151 * Kernel startup for virtual kernels - standard main()
153 int main(int ac, char **av) {
154 char *memImageFile = NULL;
155 char *netifFile[VKNETIF_MAX];
156 char *diskFile[VKDISK_MAX];
157 char *cdFile[VKDISK_MAX];
162 int netifFileNum = 0;
165 int bootOnDisk = -1; /* set below to vcd (0) or vkd (1) */
173 int dflag = 0; /* disable vmm */
174 int real_vkernel_enable;
184 * Currently a bad hack but rtld-elf needs LD_SHAREDLIB_BASE to
185 * be set to force it to mmap() shared libraries into low memory,
186 * so our module loader can link against the related symbols.
188 if (getenv("LD_SHAREDLIB_BASE") == NULL) {
189 setenv("LD_SHAREDLIB_BASE", "0x10000000", 1);
191 fprintf(stderr, "Must run %s with full path\n", av[0]);
195 while ((pid = fork()) != 0) {
197 bzero(&sa, sizeof(sa));
198 sigemptyset(&sa.sa_mask);
199 sa.sa_handler = SIG_IGN;
200 sigaction(SIGINT, &sa, NULL);
201 sigaction(SIGQUIT, &sa, NULL);
202 sigaction(SIGHUP, &sa, NULL);
205 * Wait for child to terminate, exit if
206 * someone stole our child.
208 while (waitpid(pid, &status, 0) != pid) {
212 if (WEXITSTATUS(status) != EX_VKERNEL_REBOOT)
227 kernel_mem_readonly = 1;
231 lwp_cpu_lock = LCL_NONE;
233 real_vkernel_enable = 0;
234 vsize = sizeof(real_vkernel_enable);
235 sysctlbyname("vm.vkernel_enable", &real_vkernel_enable, &vsize, NULL,0);
237 if (real_vkernel_enable == 0) {
238 errx(1, "vm.vkernel_enable is 0, must be set "
239 "to 1 to execute a vkernel!");
243 vsize = sizeof(real_ncpus);
244 sysctlbyname("hw.ncpu", &real_ncpus, &vsize, NULL, 0);
249 while ((c = getopt(ac, av, "c:hsvl:m:n:r:e:i:p:I:Ud")) != -1) {
256 * name=value:name=value:name=value...
259 * Allow values to be quoted but note that shells
260 * may remove the quotes, so using this feature
261 * to embed colons may require a backslash.
268 kern_envp = malloc(kenv_size);
269 if (kern_envp == NULL)
270 errx(1, "Couldn't allocate %zd bytes for kern_envp", kenv_size);
272 kenv_size2 = kenv_size + n + 1;
274 if ((tmp = realloc(kern_envp, kenv_size2)) == NULL)
275 errx(1, "Couldn't reallocate %zd bytes for kern_envp", kenv_size2);
277 kenv_size = kenv_size2;
280 for (i = 0, j = pos; i < n; ++i) {
281 if (optarg[i] == '"')
283 else if (optarg[i] == '\'')
285 else if (isq == 0 && optarg[i] == ':')
288 kern_envp[j++] = optarg[i];
295 boothowto |= RB_SINGLE;
301 memImageFile = optarg;
304 if (netifFileNum < VKNETIF_MAX)
305 netifFile[netifFileNum++] = strdup(optarg);
310 if (diskFileNum + cdFileNum < VKDISK_MAX)
311 diskFile[diskFileNum++] = strdup(optarg);
316 if (diskFileNum + cdFileNum < VKDISK_MAX)
317 cdFile[cdFileNum++] = strdup(optarg);
320 Maxmem_bytes = strtoull(optarg, &suffix, 0);
337 usage_err("Bad maxmem option");
345 if (strncmp("map", optarg, 3) == 0) {
346 lwp_cpu_lock = LCL_PER_CPU;
347 if (optarg[3] == ',') {
348 next_cpu = strtol(optarg+4, &endp, 0);
350 usage_err("Bad target CPU number at '%s'", endp);
354 if (next_cpu < 0 || next_cpu > real_ncpus - 1)
355 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1);
356 } else if (strncmp("any", optarg, 3) == 0) {
357 lwp_cpu_lock = LCL_NONE;
359 lwp_cpu_lock = LCL_SINGLE_CPU;
360 next_cpu = strtol(optarg, &endp, 0);
362 usage_err("Bad target CPU number at '%s'", endp);
363 if (next_cpu < 0 || next_cpu > real_ncpus - 1)
364 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1);
369 * This value is set up by mp_start(), don't just
372 tok = strtok(optarg, ":");
373 optcpus = strtol(tok, NULL, 0);
374 if (optcpus < 1 || optcpus > MAXCPU)
375 usage_err("Bad ncpus, valid range is 1-%d", MAXCPU);
377 /* :lbits argument */
378 tok = strtok(NULL, ":");
380 vkernel_b_arg = strtol(tok, NULL, 0);
382 /* :cbits argument */
383 tok = strtok(NULL, ":");
385 vkernel_B_arg = strtol(tok, NULL, 0);
394 kernel_mem_readonly = 0;
407 vsize = sizeof(vmm_enabled);
408 sysctlbyname("hw.vmm.enable", &vmm_enabled, &vsize, NULL, 0);
409 vmm_enabled = (vmm_enabled && !dflag);
414 /* use a MAP_ANON directly */
415 init_kern_memory_vmm();
417 init_sys_memory(memImageFile);
430 vsize = sizeof(tsc_present);
431 sysctlbyname("hw.tsc_present", &tsc_present, &vsize, NULL, 0);
432 vsize = sizeof(tsc_invariant);
433 sysctlbyname("hw.tsc_invariant", &tsc_invariant, &vsize, NULL, 0);
434 vsize = sizeof(tsc_mpsync);
435 sysctlbyname("hw.tsc_mpsync", &tsc_mpsync, &vsize, NULL, 0);
436 vsize = sizeof(tsc_frequency);
437 sysctlbyname("hw.tsc_frequency", &tsc_frequency, &vsize, NULL, 0);
439 cpu_feature |= CPUID_TSC;
444 vsize = sizeof(supports_sse);
446 sysctlbyname("hw.instruction_sse", &supports_sse, &vsize, NULL, 0);
447 init_fpu(supports_sse);
449 cpu_feature |= CPUID_SSE | CPUID_FXSR;
452 * We boot from the first installed disk.
454 if (bootOnDisk == 1) {
455 init_disk(diskFile, diskFileNum, VKD_DISK);
456 init_disk(cdFile, cdFileNum, VKD_CD);
458 init_disk(cdFile, cdFileNum, VKD_CD);
459 init_disk(diskFile, diskFileNum, VKD_DISK);
462 init_netif(netifFile, netifFileNum);
470 * Initialize system memory. This is the virtual kernel's 'RAM'.
474 init_sys_memory(char *imageFile)
481 * Figure out the system memory image size. If an image file was
482 * specified and -m was not specified, use the image file's size.
484 if (imageFile && stat(imageFile, &st) == 0 && Maxmem_bytes == 0)
485 Maxmem_bytes = (vm_paddr_t)st.st_size;
486 if ((imageFile == NULL || stat(imageFile, &st) < 0) &&
488 errx(1, "Cannot create new memory file %s unless "
489 "system memory size is specified with -m",
495 * Maxmem must be known at this time
497 if (Maxmem_bytes < 64 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) {
498 errx(1, "Bad maxmem specification: 64MB minimum, "
499 "multiples of %dMB only",
500 SEG_SIZE / 1024 / 1024);
505 * Generate an image file name if necessary, then open/create the
506 * file exclusively locked. Do not allow multiple virtual kernels
507 * to use the same image file.
509 * Don't iterate through a million files if we do not have write
510 * access to the directory, stop if our open() failed on a
511 * non-existant file. Otherwise opens can fail for any number
513 if (imageFile == NULL) {
514 for (i = 0; i < 1000000; ++i) {
515 asprintf(&imageFile, "/var/vkernel/memimg.%06d", i);
517 O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644);
518 if (fd < 0 && stat(imageFile, &st) == 0) {
525 fd = open(imageFile, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644);
527 fprintf(stderr, "Using memory file: %s\n", imageFile);
528 if (fd < 0 || fstat(fd, &st) < 0) {
529 err(1, "Unable to open/create %s", imageFile);
534 * Truncate or extend the file as necessary. Clean out the contents
535 * of the file, we want it to be full of holes so we don't waste
536 * time reading in data from an old file that we no longer care
540 ftruncate(fd, Maxmem_bytes);
543 Maxmem = Maxmem_bytes >> PAGE_SHIFT;
548 * Initialize kernel memory. This reserves kernel virtual memory by using
554 init_kern_memory(void)
561 * Memory map our kernel virtual memory space. Note that the
562 * kernel image itself is not made part of this memory for the
565 * The memory map must be segment-aligned so we can properly
568 * If the system kernel has a different MAXDSIZ, it might not
569 * be possible to map kernel memory in its prefered location.
570 * Try a number of different locations.
573 base = mmap((void*)KERNEL_KVA_START, KERNEL_KVA_SIZE, PROT_READ|PROT_WRITE,
574 MAP_FILE|MAP_SHARED|MAP_VPAGETABLE|MAP_FIXED|MAP_TRYFIXED,
575 MemImageFd, (off_t)KERNEL_KVA_START);
577 if (base == MAP_FAILED) {
578 err(1, "Unable to mmap() kernel virtual memory!");
581 madvise(base, KERNEL_KVA_SIZE, MADV_NOSYNC);
582 KvaStart = (vm_offset_t)base;
583 KvaSize = KERNEL_KVA_SIZE;
584 KvaEnd = KvaStart + KvaSize;
586 /* cannot use kprintf yet */
587 printf("KVM mapped at %p-%p\n", (void *)KvaStart, (void *)KvaEnd);
590 dmap_min_address = mmap(0, DMAP_SIZE, PROT_READ|PROT_WRITE,
591 MAP_NOCORE|MAP_NOSYNC|MAP_SHARED,
593 if (dmap_min_address == MAP_FAILED) {
594 err(1, "Unable to mmap() kernel DMAP region!");
599 * Bootstrap the kernel_pmap
602 pmap_bootstrap((vm_paddr_t *)&firstfree, (int64_t)base);
604 mcontrol(base, KERNEL_KVA_SIZE, MADV_SETMAP,
605 0 | VPTE_RW | VPTE_V);
608 * phys_avail[] represents unallocated physical memory. MI code
609 * will use phys_avail[] to create the vm_page array.
611 phys_avail[0] = (vm_paddr_t)firstfree;
612 phys_avail[0] = (phys_avail[0] + PAGE_MASK) & ~(vm_paddr_t)PAGE_MASK;
613 phys_avail[1] = Maxmem_bytes;
617 * (virtual_start, virtual_end) represent unallocated kernel virtual
618 * memory. MI code will create kernel_map using these parameters.
620 virtual_start = KvaStart + (long)firstfree;
621 virtual_start = (virtual_start + PAGE_MASK) & ~(vm_offset_t)PAGE_MASK;
622 virtual_end = KvaStart + KERNEL_KVA_SIZE;
626 * pmap_growkernel() will set the correct value.
631 * Allocate space for process 0's UAREA.
633 proc0paddr = (void *)virtual_start;
634 for (i = 0; i < UPAGES; ++i) {
635 pmap_kenter_quick(virtual_start, phys_avail[0]);
636 virtual_start += PAGE_SIZE;
637 phys_avail[0] += PAGE_SIZE;
643 crashdumpmap = virtual_start;
644 virtual_start += MAXDUMPPGS * PAGE_SIZE;
647 * msgbufp maps the system message buffer
649 assert((MSGBUF_SIZE & PAGE_MASK) == 0);
650 msgbufp = (void *)virtual_start;
651 for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) {
652 pmap_kenter_quick(virtual_start, phys_avail[0]);
653 virtual_start += PAGE_SIZE;
654 phys_avail[0] += PAGE_SIZE;
656 msgbufinit(msgbufp, MSGBUF_SIZE);
659 * used by kern_memio for /dev/mem access
661 ptvmmap = (caddr_t)virtual_start;
662 virtual_start += PAGE_SIZE;
667 init_kern_memory_vmm(void)
671 struct vmm_guest_options options;
674 KvaStart = (vm_offset_t)KERNEL_KVA_START;
675 KvaSize = KERNEL_KVA_SIZE;
676 KvaEnd = KvaStart + KvaSize;
678 Maxmem = Maxmem_bytes >> PAGE_SHIFT;
681 if (Maxmem_bytes < 64 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) {
682 errx(1, "Bad maxmem specification: 64MB minimum, "
683 "multiples of %dMB only",
684 SEG_SIZE / 1024 / 1024);
688 /* Call the vmspace_create to allocate the internal
689 * vkernel structures. Won't do anything else (no new
692 if (vmspace_create(NULL, 0, NULL) < 0)
693 panic("vmspace_create() failed");
697 * MAP_ANON the region of the VKERNEL phyisical memory
698 * (known as GPA - Guest Physical Address
700 dmap_address = mmap(NULL, Maxmem_bytes, PROT_READ|PROT_WRITE|PROT_EXEC,
701 MAP_ANON|MAP_SHARED, -1, 0);
702 if (dmap_address == MAP_FAILED) {
703 err(1, "Unable to mmap() RAM region!");
707 /* Alloc a new stack in the lowmem */
708 vkernel_stack = mmap(NULL, KERNEL_STACK_SIZE,
709 PROT_READ|PROT_WRITE|PROT_EXEC,
711 if (vkernel_stack == MAP_FAILED) {
712 err(1, "Unable to allocate stack\n");
716 * Bootstrap the kernel_pmap
718 firstfree = dmap_address;
719 dmap_min_address = NULL; /* VIRT == PHYS in the first 512G */
720 pmap_bootstrap((vm_paddr_t *)&firstfree, (uint64_t)KvaStart);
725 options.guest_cr3 = (register_t) KPML4phys;
726 options.new_stack = (uint64_t) vkernel_stack + KERNEL_STACK_SIZE;
728 if (vmm_guest_ctl(VMM_GUEST_RUN, &options)) {
729 err(1, "Unable to enter VMM mode.");
733 * phys_avail[] represents unallocated physical memory. MI code
734 * will use phys_avail[] to create the vm_page array.
736 phys_avail[0] = (vm_paddr_t)firstfree;
737 phys_avail[0] = (phys_avail[0] + PAGE_MASK) & ~(vm_paddr_t)PAGE_MASK;
738 phys_avail[1] = (vm_paddr_t)dmap_address + Maxmem_bytes;
741 * pmap_growkernel() will set the correct value.
746 * Allocate space for process 0's UAREA.
748 proc0paddr = (void *)virtual_start;
749 for (i = 0; i < UPAGES; ++i) {
750 pmap_kenter_quick(virtual_start, phys_avail[0]);
751 virtual_start += PAGE_SIZE;
752 phys_avail[0] += PAGE_SIZE;
758 crashdumpmap = virtual_start;
759 virtual_start += MAXDUMPPGS * PAGE_SIZE;
762 * msgbufp maps the system message buffer
764 assert((MSGBUF_SIZE & PAGE_MASK) == 0);
765 msgbufp = (void *)virtual_start;
766 for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) {
768 pmap_kenter_quick(virtual_start, phys_avail[0]);
769 virtual_start += PAGE_SIZE;
770 phys_avail[0] += PAGE_SIZE;
773 msgbufinit(msgbufp, MSGBUF_SIZE);
776 * used by kern_memio for /dev/mem access
778 ptvmmap = (caddr_t)virtual_start;
779 virtual_start += PAGE_SIZE;
781 printf("vmm: Hardware pagetable enabled for guest\n");
786 * Map the per-cpu globaldata for cpu #0. Allocate the space using
787 * virtual_start and phys_avail[0]
791 init_globaldata(void)
798 * Reserve enough KVA to cover possible cpus. This is a considerable
799 * amount of KVA since the privatespace structure includes two
800 * whole page table mappings.
802 virtual_start = (virtual_start + SEG_MASK) & ~(vm_offset_t)SEG_MASK;
803 CPU_prvspace = (void *)virtual_start;
804 virtual_start += sizeof(struct privatespace) * SMP_MAXCPU;
807 * Allocate enough physical memory to cover the mdglobaldata
808 * portion of the space and the idle stack and map the pages
809 * into KVA. For cpu #0 only.
811 for (i = 0; i < sizeof(struct mdglobaldata); i += PAGE_SIZE) {
813 va = (vm_offset_t)&CPU_prvspace[0].mdglobaldata + i;
814 pmap_kenter_quick(va, pa);
815 phys_avail[0] += PAGE_SIZE;
817 for (i = 0; i < sizeof(CPU_prvspace[0].idlestack); i += PAGE_SIZE) {
819 va = (vm_offset_t)&CPU_prvspace[0].idlestack + i;
820 pmap_kenter_quick(va, pa);
821 phys_avail[0] += PAGE_SIZE;
825 * Setup the %gs for cpu #0. The mycpu macro works after this
826 * point. Note that %fs is used by pthreads.
828 tls_set_gs(&CPU_prvspace[0], sizeof(struct privatespace));
833 * Initialize pool tokens and other necessary locks
840 * Get the initial mplock with a count of 1 for the BSP.
841 * This uses a LOGICAL cpu ID, ie BSP == 0.
843 cpu_get_initial_mplock();
845 /* our token pool needs to work early */
846 lwkt_token_pool_init();
852 * Initialize very low level systems including thread0, proc0, etc.
858 struct mdglobaldata *gd;
860 gd = &CPU_prvspace[0].mdglobaldata;
861 bzero(gd, sizeof(*gd));
863 gd->mi.gd_curthread = &thread0;
864 thread0.td_gd = &gd->mi;
866 ncpus2 = 1; /* rounded down power of 2 */
867 ncpus_fit = 1; /* rounded up power of 2 */
868 /* ncpus2_mask and ncpus_fit_mask are 0 */
870 gd->mi.gd_prvspace = &CPU_prvspace[0];
871 mi_gdinit(&gd->mi, 0);
873 mi_proc0init(&gd->mi, proc0paddr);
874 lwp0.lwp_md.md_regs = &proc0_tf;
879 #if 0 /* #ifdef DDB */
881 if (boothowto & RB_KDB)
882 Debugger("Boot flags requested debugger");
886 initializecpu(); /* Initialize CPU registers */
888 init_param2((phys_avail[1] - phys_avail[0]) / PAGE_SIZE);
892 * Map the message buffer
894 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE)
895 pmap_kenter((vm_offset_t)msgbufp + off, avail_end + off);
896 msgbufinit(msgbufp, MSGBUF_SIZE);
899 thread0.td_pcb_cr3 ... MMU
900 lwp0.lwp_md.md_regs = &proc0_tf;
905 * Filesystem image paths for the virtual kernel are optional.
906 * If specified they each should point to a disk image,
907 * the first of which will become the root disk.
909 * The virtual kernel caches data from our 'disk' just like a normal kernel,
910 * so we do not really want the real kernel to cache the data too. Use
911 * O_DIRECT to remove the duplication.
915 init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type)
920 if (diskFileNum == 0)
923 for(i=0; i < diskFileNum; i++){
928 warnx("Invalid argument to '-r'");
932 * Check for a serial number for the virtual disk
933 * passed from the command line.
938 if (DiskNum < VKDISK_MAX) {
940 struct vkdisk_info* info = NULL;
944 if (type == VKD_DISK)
945 fd = open(fname, O_RDWR|O_DIRECT, 0644);
947 fd = open(fname, O_RDONLY|O_DIRECT, 0644);
948 if (fd < 0 || fstat(fd, &st) < 0) {
949 err(1, "Unable to open/create %s", fname);
952 if (S_ISREG(st.st_mode)) {
953 if (flock(fd, LOCK_EX|LOCK_NB) < 0) {
954 errx(1, "Disk image %s is already "
960 info = &DiskInfo[DiskNum];
966 memcpy(info->fname, fname, l);
969 if ((info->serno = malloc(SERNOLEN)) != NULL)
970 strlcpy(info->serno, serno, SERNOLEN);
972 warnx("Couldn't allocate memory for the operation");
976 if (type == VKD_CD) {
977 rootdevnames[0] = "cd9660:vcd0a";
978 } else if (type == VKD_DISK) {
979 rootdevnames[0] = "ufs:vkd0s0a";
980 rootdevnames[1] = "ufs:vkd0s1a";
986 warnx("vkd%d (%s) > VKDISK_MAX", DiskNum, fname);
994 netif_set_tapflags(int tap_unit, int f, int s)
999 bzero(&ifr, sizeof(ifr));
1001 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit);
1002 if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) {
1003 warn("tap%d: ioctl(SIOCGIFFLAGS) failed", tap_unit);
1010 * If the flags are already set/cleared, then we return
1011 * immediately to avoid extra syscalls
1013 flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16);
1015 /* Turn off flags */
1017 if ((flags & f) == 0)
1028 * Fix up ifreq.ifr_name, since it may be trashed
1029 * in previous ioctl(SIOCGIFFLAGS)
1031 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit);
1033 ifr.ifr_flags = flags & 0xffff;
1034 ifr.ifr_flagshigh = flags >> 16;
1035 if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) {
1036 warn("tap%d: ioctl(SIOCSIFFLAGS) failed", tap_unit);
1044 netif_set_tapaddr(int tap_unit, in_addr_t addr, in_addr_t mask, int s)
1046 struct ifaliasreq ifra;
1047 struct sockaddr_in *in;
1049 bzero(&ifra, sizeof(ifra));
1050 snprintf(ifra.ifra_name, sizeof(ifra.ifra_name), "tap%d", tap_unit);
1053 in = (struct sockaddr_in *)&ifra.ifra_addr;
1054 in->sin_family = AF_INET;
1055 in->sin_len = sizeof(*in);
1056 in->sin_addr.s_addr = addr;
1060 in = (struct sockaddr_in *)&ifra.ifra_mask;
1061 in->sin_len = sizeof(*in);
1062 in->sin_addr.s_addr = mask;
1065 if (ioctl(s, SIOCAIFADDR, &ifra) < 0) {
1066 warn("tap%d: ioctl(SIOCAIFADDR) failed", tap_unit);
1074 netif_add_tap2brg(int tap_unit, const char *ifbridge, int s)
1079 bzero(&ifbr, sizeof(ifbr));
1080 snprintf(ifbr.ifbr_ifsname, sizeof(ifbr.ifbr_ifsname),
1083 bzero(&ifd, sizeof(ifd));
1084 strlcpy(ifd.ifd_name, ifbridge, sizeof(ifd.ifd_name));
1085 ifd.ifd_cmd = BRDGADD;
1086 ifd.ifd_len = sizeof(ifbr);
1087 ifd.ifd_data = &ifbr;
1089 if (ioctl(s, SIOCSDRVSPEC, &ifd) < 0) {
1091 * 'errno == EEXIST' means that the tap(4) is already
1092 * a member of the bridge(4)
1094 if (errno != EEXIST) {
1095 warn("ioctl(%s, SIOCSDRVSPEC) failed", ifbridge);
1102 #define TAPDEV_OFLAGS (O_RDWR | O_NONBLOCK)
1105 * Locate the first unused tap(4) device file if auto mode is requested,
1106 * or open the user supplied device file, and bring up the corresponding
1109 * NOTE: Only tap(4) device file is supported currently
1113 netif_open_tap(const char *netif, int *tap_unit, int s)
1115 char tap_dev[MAXPATHLEN];
1122 if (strcmp(netif, "auto") == 0) {
1124 * Find first unused tap(4) device file
1126 tap_fd = open("/dev/tap", TAPDEV_OFLAGS);
1128 warnc(errno, "Unable to find a free tap(4)");
1133 * User supplied tap(4) device file or unix socket.
1135 if (netif[0] == '/') /* Absolute path */
1136 strlcpy(tap_dev, netif, sizeof(tap_dev));
1138 snprintf(tap_dev, sizeof(tap_dev), "/dev/%s", netif);
1140 tap_fd = open(tap_dev, TAPDEV_OFLAGS);
1143 * If we cannot open normally try to connect to it.
1146 tap_fd = unix_connect(tap_dev);
1149 warn("Unable to open %s", tap_dev);
1155 * Check whether the device file is a tap(4)
1157 if (fstat(tap_fd, &st) < 0) {
1159 } else if (S_ISCHR(st.st_mode)) {
1160 dname = fdevname(tap_fd);
1162 dname = strstr(dname, "tap");
1165 * Bring up the corresponding tap(4) interface
1167 *tap_unit = strtol(dname + 3, NULL, 10);
1168 printf("TAP UNIT %d\n", *tap_unit);
1169 if (netif_set_tapflags(*tap_unit, IFF_UP, s) == 0)
1176 } else if (S_ISSOCK(st.st_mode)) {
1178 * Special socket connection (typically to vknet). We
1179 * do not have to do anything.
1187 warnx("%s is not a tap(4) device or socket", tap_dev);
1196 unix_connect(const char *path)
1198 struct sockaddr_un sunx;
1201 int sndbuf = 262144;
1204 snprintf(sunx.sun_path, sizeof(sunx.sun_path), "%s", path);
1205 len = offsetof(struct sockaddr_un, sun_path[strlen(sunx.sun_path)]);
1206 ++len; /* include nul */
1207 sunx.sun_family = AF_UNIX;
1210 net_fd = socket(AF_UNIX, SOCK_SEQPACKET, 0);
1213 if (connect(net_fd, (void *)&sunx, len) < 0) {
1217 setsockopt(net_fd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(sndbuf));
1218 if (fstat(net_fd, &st) == 0)
1219 printf("Network socket buffer: %d bytes\n", st.st_blksize);
1220 fcntl(net_fd, F_SETFL, O_NONBLOCK);
1226 #undef TAPDEV_OFLAGS
1229 * Following syntax is supported,
1230 * 1) x.x.x.x tap(4)'s address is x.x.x.x
1232 * 2) x.x.x.x/z tap(4)'s address is x.x.x.x
1233 * tap(4)'s netmask len is z
1235 * 3) x.x.x.x:y.y.y.y tap(4)'s address is x.x.x.x
1236 * pseudo netif's address is y.y.y.y
1238 * 4) x.x.x.x:y.y.y.y/z tap(4)'s address is x.x.x.x
1239 * pseudo netif's address is y.y.y.y
1240 * tap(4) and pseudo netif's netmask len are z
1242 * 5) bridgeX tap(4) will be added to bridgeX
1244 * 6) bridgeX:y.y.y.y tap(4) will be added to bridgeX
1245 * pseudo netif's address is y.y.y.y
1247 * 7) bridgeX:y.y.y.y/z tap(4) will be added to bridgeX
1248 * pseudo netif's address is y.y.y.y
1249 * pseudo netif's netmask len is z
1253 netif_init_tap(int tap_unit, in_addr_t *addr, in_addr_t *mask, int s)
1255 in_addr_t tap_addr, netmask, netif_addr;
1256 int next_netif_addr;
1257 char *tok, *masklen_str, *ifbridge;
1262 tok = strtok(NULL, ":/");
1265 * Nothing special, simply use tap(4) as backend
1270 if (inet_pton(AF_INET, tok, &tap_addr) > 0) {
1272 * tap(4)'s address is supplied
1277 * If there is next token, then it may be pseudo
1278 * netif's address or netmask len for tap(4)
1280 next_netif_addr = 0;
1283 * Not tap(4)'s address, assume it as a bridge(4)
1290 * If there is next token, then it must be pseudo
1293 next_netif_addr = 1;
1296 netmask = netif_addr = 0;
1298 tok = strtok(NULL, ":/");
1302 if (inet_pton(AF_INET, tok, &netif_addr) <= 0) {
1303 if (next_netif_addr) {
1304 warnx("Invalid pseudo netif address: %s", tok);
1310 * Current token is not address, then it must be netmask len
1315 * Current token is pseudo netif address, if there is next token
1316 * it must be netmask len
1318 masklen_str = strtok(NULL, "/");
1321 /* Calculate netmask */
1322 if (masklen_str != NULL) {
1325 masklen = strtoul(masklen_str, NULL, 10);
1326 if (masklen < 32 && masklen > 0) {
1327 netmask = htonl(~((1LL << (32 - masklen)) - 1)
1330 warnx("Invalid netmask len: %lu", masklen);
1335 /* Make sure there is no more token left */
1336 if (strtok(NULL, ":/") != NULL) {
1337 warnx("Invalid argument to '-I'");
1344 } else if (ifbridge == NULL) {
1345 /* Set tap(4) address/netmask */
1346 if (netif_set_tapaddr(tap_unit, tap_addr, netmask, s) < 0)
1349 /* Tie tap(4) to bridge(4) */
1350 if (netif_add_tap2brg(tap_unit, ifbridge, s) < 0)
1360 * NetifInfo[] will be filled for pseudo netif initialization.
1361 * NetifNum will be bumped to reflect the number of valid entries
1366 init_netif(char *netifExp[], int netifExpNum)
1371 if (netifExpNum == 0)
1374 s = socket(AF_INET, SOCK_DGRAM, 0); /* for ioctl(SIOC) */
1378 for (i = 0; i < netifExpNum; ++i) {
1379 struct vknetif_info *info;
1380 in_addr_t netif_addr, netif_mask;
1381 int tap_fd, tap_unit;
1384 /* Extract MAC address if there is one */
1388 netif = strtok(netifExp[i], ":");
1389 if (netif == NULL) {
1390 warnx("Invalid argument to '-I'");
1395 * Open tap(4) device file and bring up the
1396 * corresponding interface
1398 tap_fd = netif_open_tap(netif, &tap_unit, s);
1403 * Initialize tap(4) and get address/netmask
1406 * NB: Rest part of netifExp[i] is passed
1407 * to netif_init_tap() implicitly.
1409 if (netif_init_tap(tap_unit, &netif_addr, &netif_mask, s) < 0) {
1411 * NB: Closing tap(4) device file will bring
1412 * down the corresponding interface
1418 info = &NetifInfo[NetifNum];
1419 bzero(info, sizeof(*info));
1420 info->tap_fd = tap_fd;
1421 info->tap_unit = tap_unit;
1422 info->netif_addr = netif_addr;
1423 info->netif_mask = netif_mask;
1425 * If tmp isn't NULL it means a MAC could have been
1426 * specified so attempt to convert it.
1427 * Setting enaddr to NULL will tell vke_attach() we
1428 * need a pseudo-random MAC address.
1431 if ((info->enaddr = malloc(ETHER_ADDR_LEN)) == NULL)
1432 warnx("Couldn't allocate memory for the operation");
1434 if ((kether_aton(tmp, info->enaddr)) == NULL) {
1436 info->enaddr = NULL;
1442 if (NetifNum >= VKNETIF_MAX) /* XXX will this happen? */
1449 * Create the pid file and leave it open and locked while the vkernel is
1450 * running. This allows a script to use /usr/bin/lockf to probe whether
1451 * a vkernel is still running (so as not to accidently kill an unrelated
1452 * process from a stale pid file).
1461 if (pid_file != NULL) {
1462 snprintf(buf, sizeof(buf), "%ld\n", (long)getpid());
1463 fd = open(pid_file, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0666);
1465 if (errno == EWOULDBLOCK) {
1466 perror("Failed to lock pidfile, "
1467 "vkernel already running");
1469 perror("Failed to create pidfile");
1474 write(fd, buf, strlen(buf));
1475 /* leave the file open to maintain the lock */
1483 if (pid_file != NULL) {
1484 if (unlink(pid_file) < 0)
1485 perror("Warning: couldn't remove pidfile");
1491 usage_err(const char *ctl, ...)
1496 vfprintf(stderr, ctl, va);
1498 fprintf(stderr, "\n");
1504 usage_help(_Bool help)
1506 fprintf(stderr, "Usage: %s [-hsUvd] [-c file] [-e name=value:name=value:...]\n"
1507 "\t[-i file] [-I interface[:address1[:address2][/netmask]]] [-l cpulock]\n"
1508 "\t[-m size] [-n numcpus[:lbits[:cbits]]]\n"
1509 "\t[-p file] [-r file]\n", save_av[0]);
1512 fprintf(stderr, "\nArguments:\n"
1513 "\t-c\tSpecify a readonly CD-ROM image file to be used by the kernel.\n"
1514 "\t-e\tSpecify an environment to be used by the kernel.\n"
1515 "\t-h\tThis list of options.\n"
1516 "\t-i\tSpecify a memory image file to be used by the virtual kernel.\n"
1517 "\t-I\tCreate a virtual network device.\n"
1518 "\t-l\tSpecify which, if any, real CPUs to lock virtual CPUs to.\n"
1519 "\t-m\tSpecify the amount of memory to be used by the kernel in bytes.\n"
1520 "\t-n\tSpecify the number of CPUs and the topology you wish to emulate:\n"
1521 "\t \t- numcpus - number of cpus\n"
1522 "\t \t- :lbits - specify the number of bits within APICID(=CPUID) needed for representing\n"
1523 "\t \t the logical ID. Controls the number of threads/core (0bits - 1 thread, 1bit - 2 threads).\n"
1524 "\t \t- :cbits - specify the number of bits within APICID(=CPUID) needed for representing\n"
1525 "\t \t the core ID. Controls the number of core/package (0bits - 1 core, 1bit - 2 cores).\n"
1526 "\t-p\tSpecify a file in which to store the process ID.\n"
1527 "\t-r\tSpecify a R/W disk image file to be used by the kernel.\n"
1528 "\t-s\tBoot into single-user mode.\n"
1529 "\t-U\tEnable writing to kernel memory and module loading.\n"
1530 "\t-v\tTurn on verbose booting.\n");
1538 kprintf("cpu reset, rebooting vkernel\n");
1541 exit(EX_VKERNEL_REBOOT);
1548 kprintf("cpu halt, exiting vkernel\n");
1556 switch(lwp_cpu_lock) {
1559 kprintf("Locking CPU%d to real cpu %d\n",
1561 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu));
1563 if (next_cpu >= real_ncpus)
1566 case LCL_SINGLE_CPU:
1568 kprintf("Locking CPU%d to real cpu %d\n",
1570 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu));
1573 /* do not map virtual cpus to real cpus */
1579 * Allocate and free memory for module loading. The loaded module
1580 * has to be placed somewhere near the current kernel binary load
1581 * point or the relocations will not work.
1583 * I'm not sure why this isn't working.
1586 vkernel_module_memory_alloc(vm_offset_t *basep, size_t bytes)
1590 xtra = (PAGE_SIZE - (vm_offset_t)sbrk(0)) & PAGE_MASK;
1591 *basep = (vm_offset_t)sbrk(xtra + bytes) + xtra;
1592 bzero((void *)*basep, bytes);
1594 *basep = (vm_offset_t)mmap((void *)0x000000000, bytes,
1595 PROT_READ|PROT_WRITE|PROT_EXEC,
1596 MAP_ANON|MAP_SHARED, -1, 0);
1597 if ((void *)*basep == MAP_FAILED)
1604 vkernel_module_memory_free(vm_offset_t base, size_t bytes)
1608 munmap((void *)base, bytes);