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rump.c revision 1.206 
      1 /*	$NetBSD: rump.c,v 1.206 2010/11/22 20:42:19 pooka Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2007 Antti Kantee.  All Rights Reserved.
      5  *
      6  * Development of this software was supported by Google Summer of Code.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     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 the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     18  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     23  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  * SUCH DAMAGE.
     28  */
     29 
     30 #include <sys/cdefs.h>
     31 __KERNEL_RCSID(0, "$NetBSD: rump.c,v 1.206 2010/11/22 20:42:19 pooka Exp $");
     32 
     33 #include <sys/systm.h>
     34 #define ELFSIZE ARCH_ELFSIZE
     35 
     36 #include <sys/param.h>
     37 #include <sys/atomic.h>
     38 #include <sys/buf.h>
     39 #include <sys/callout.h>
     40 #include <sys/conf.h>
     41 #include <sys/cpu.h>
     42 #include <sys/device.h>
     43 #include <sys/evcnt.h>
     44 #include <sys/event.h>
     45 #include <sys/exec_elf.h>
     46 #include <sys/filedesc.h>
     47 #include <sys/iostat.h>
     48 #include <sys/kauth.h>
     49 #include <sys/kernel.h>
     50 #include <sys/kmem.h>
     51 #include <sys/kprintf.h>
     52 #include <sys/kthread.h>
     53 #include <sys/ksyms.h>
     54 #include <sys/msgbuf.h>
     55 #include <sys/module.h>
     56 #include <sys/once.h>
     57 #include <sys/percpu.h>
     58 #include <sys/pipe.h>
     59 #include <sys/pool.h>
     60 #include <sys/queue.h>
     61 #include <sys/reboot.h>
     62 #include <sys/resourcevar.h>
     63 #include <sys/select.h>
     64 #include <sys/sysctl.h>
     65 #include <sys/syscall.h>
     66 #include <sys/syscallvar.h>
     67 #include <sys/timetc.h>
     68 #include <sys/tty.h>
     69 #include <sys/uidinfo.h>
     70 #include <sys/vmem.h>
     71 #include <sys/xcall.h>
     72 
     73 #include <rump/rumpuser.h>
     74 
     75 #include <secmodel/suser/suser.h>
     76 
     77 #include <prop/proplib.h>
     78 
     79 #include <uvm/uvm_extern.h>
     80 #include <uvm/uvm_readahead.h>
     81 
     82 #include "rump_private.h"
     83 #include "rump_net_private.h"
     84 #include "rump_vfs_private.h"
     85 #include "rump_dev_private.h"
     86 
     87 char machine[] = MACHINE;
     88 
     89 struct proc *initproc;
     90 
     91 struct rumpuser_mtx *rump_giantlock;
     92 
     93 struct device rump_rootdev = {
     94 	.dv_class = DV_VIRTUAL
     95 };
     96 
     97 #ifdef RUMP_WITHOUT_THREADS
     98 int rump_threads = 0;
     99 #else
    100 int rump_threads = 1;
    101 #endif
    102 
    103 static int rump_proxy_syscall(int, void *, register_t *);
    104 static int rump_proxy_newproc(void *);
    105 
    106 static char rump_msgbuf[16*1024]; /* 16k should be enough for std rump needs */
    107 
    108 static void
    109 rump_aiodone_worker(struct work *wk, void *dummy)
    110 {
    111 	struct buf *bp = (struct buf *)wk;
    112 
    113 	KASSERT(&bp->b_work == wk);
    114 	bp->b_iodone(bp);
    115 }
    116 
    117 static int rump_inited;
    118 
    119 /*
    120  * Make sure pnbuf_cache is available even without vfs
    121  */
    122 struct pool_cache *pnbuf_cache;
    123 int rump_initpnbufpool(void);
    124 int rump_initpnbufpool(void)
    125 {
    126 
    127         pnbuf_cache = pool_cache_init(MAXPATHLEN, 0, 0, 0, "pnbufpl",
    128 	    NULL, IPL_NONE, NULL, NULL, NULL);
    129 	return EOPNOTSUPP;
    130 }
    131 
    132 int rump__unavailable(void);
    133 int rump__unavailable() {return EOPNOTSUPP;}
    134 __weak_alias(rump_net_init,rump__unavailable);
    135 __weak_alias(rump_vfs_init,rump_initpnbufpool);
    136 __weak_alias(rump_dev_init,rump__unavailable);
    137 
    138 __weak_alias(rump_vfs_fini,rump__unavailable);
    139 
    140 __weak_alias(biodone,rump__unavailable);
    141 __weak_alias(sopoll,rump__unavailable);
    142 
    143 __weak_alias(rump_vfs_drainbufs,rump__unavailable);
    144 
    145 void rump__unavailable_vfs_panic(void);
    146 void rump__unavailable_vfs_panic() {panic("vfs component not available");}
    147 __weak_alias(usermount_common_policy,rump__unavailable_vfs_panic);
    148 
    149 rump_proc_vfs_init_fn rump_proc_vfs_init;
    150 rump_proc_vfs_release_fn rump_proc_vfs_release;
    151 
    152 static void add_linkedin_modules(const struct modinfo *const *, size_t);
    153 
    154 static void __noinline
    155 messthestack(void)
    156 {
    157 	volatile uint32_t mess[64];
    158 	uint64_t d1, d2;
    159 	int i, error;
    160 
    161 	for (i = 0; i < 64; i++) {
    162 		rumpuser_gettime(&d1, &d2, &error);
    163 		mess[i] = d2;
    164 	}
    165 }
    166 
    167 /*
    168  * Create kern.hostname.  why only this you ask.  well, init_sysctl
    169  * is a kitchen sink in need of some gardening.  but i want to use
    170  * kern.hostname today.
    171  */
    172 static void
    173 mksysctls(void)
    174 {
    175 
    176 	sysctl_createv(NULL, 0, NULL, NULL,
    177 	    CTLFLAG_PERMANENT, CTLTYPE_NODE, "kern", NULL,
    178 	    NULL, 0, NULL, 0, CTL_KERN, CTL_EOL);
    179 
    180 	/* XXX: setting hostnamelen is missing */
    181 	sysctl_createv(NULL, 0, NULL, NULL,
    182 	    CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_STRING, "hostname",
    183 	    SYSCTL_DESCR("System hostname"), NULL, 0,
    184 	    &hostname, MAXHOSTNAMELEN, CTL_KERN, KERN_HOSTNAME, CTL_EOL);
    185 }
    186 
    187 /* there's no convenient kernel entry point for this, so just craft out own */
    188 static pid_t
    189 spgetpid(void)
    190 {
    191 
    192 	return curproc->p_pid;
    193 }
    194 
    195 static const struct rumpuser_sp_ops spops = {
    196 	.spop_schedule		= rump_schedule,
    197 	.spop_unschedule	= rump_unschedule,
    198 	.spop_lwproc_switch	= rump_lwproc_switch,
    199 	.spop_lwproc_release	= rump_lwproc_releaselwp,
    200 	.spop_lwproc_newproc	= rump_proxy_newproc,
    201 	.spop_lwproc_newlwp	= rump_lwproc_newlwp,
    202 	.spop_lwproc_curlwp	= rump_lwproc_curlwp,
    203 	.spop_syscall		= rump_proxy_syscall,
    204 	.spop_getpid		= spgetpid,
    205 };
    206 
    207 int
    208 rump__init(int rump_version)
    209 {
    210 	char buf[256];
    211 	struct timespec ts;
    212 	uint64_t sec, nsec;
    213 	struct lwp *l;
    214 	int i, numcpu;
    215 	int error;
    216 
    217 	/* not reentrant */
    218 	if (rump_inited)
    219 		return 0;
    220 	else if (rump_inited == -1)
    221 		panic("rump_init: host process restart required");
    222 	else
    223 		rump_inited = 1;
    224 
    225 	/* Check our role as a rump proxy */
    226 	if (rumpuser_getenv("RUMP_SP_SERVER", buf, sizeof(buf), &error) == 0) {
    227 		error = rumpuser_sp_init(&spops, buf);
    228 		if (error)
    229 			return error;
    230 	}
    231 
    232 	if (rumpuser_getversion() != RUMPUSER_VERSION) {
    233 		/* let's hope the ABI of rumpuser_dprintf is the same ;) */
    234 		rumpuser_dprintf("rumpuser version mismatch: %d vs. %d\n",
    235 		    rumpuser_getversion(), RUMPUSER_VERSION);
    236 		return EPROGMISMATCH;
    237 	}
    238 
    239 	if (rumpuser_getenv("RUMP_VERBOSE", buf, sizeof(buf), &error) == 0) {
    240 		if (*buf != '0')
    241 			boothowto = AB_VERBOSE;
    242 	}
    243 
    244 	if (rumpuser_getenv("RUMP_NCPU", buf, sizeof(buf), &error) == 0)
    245 		error = 0;
    246 	/* non-x86 is missing CPU_INFO_FOREACH() support */
    247 #ifdef RUMP_SMP
    248 	if (error == 0) {
    249 		numcpu = strtoll(buf, NULL, 10);
    250 		if (numcpu < 1)
    251 			numcpu = 1;
    252 	} else {
    253 		numcpu = rumpuser_getnhostcpu();
    254 	}
    255 #else
    256 	if (error == 0)
    257 		printf("NCPU limited to 1 on this machine architecture\n");
    258 	numcpu = 1;
    259 #endif
    260 	rump_cpus_bootstrap(&numcpu);
    261 
    262 	rumpuser_gettime(&sec, &nsec, &error);
    263 	boottime.tv_sec = sec;
    264 	boottime.tv_nsec = nsec;
    265 
    266 	initmsgbuf(rump_msgbuf, sizeof(rump_msgbuf));
    267 	aprint_verbose("%s%s", copyright, version);
    268 
    269 	/*
    270 	 * Seed arc4random() with a "reasonable" amount of randomness.
    271 	 * Yes, this is a quick kludge which depends on the arc4random
    272 	 * implementation.
    273 	 */
    274 	messthestack();
    275 	arc4random();
    276 
    277 	if (rump_version != RUMP_VERSION) {
    278 		printf("rump version mismatch, %d vs. %d\n",
    279 		    rump_version, RUMP_VERSION);
    280 		return EPROGMISMATCH;
    281 	}
    282 
    283 	if (rumpuser_getenv("RUMP_THREADS", buf, sizeof(buf), &error) == 0) {
    284 		rump_threads = *buf != '0';
    285 	}
    286 	rumpuser_thrinit(rump_user_schedule, rump_user_unschedule,
    287 	    rump_threads);
    288 	rump_intr_init(numcpu);
    289 	rump_tsleep_init();
    290 
    291 	/* init minimal lwp/cpu context */
    292 	l = &lwp0;
    293 	l->l_lid = 1;
    294 	l->l_cpu = l->l_target_cpu = rump_cpu;
    295 	l->l_fd = &filedesc0;
    296 	rumpuser_set_curlwp(l);
    297 
    298 	mutex_init(&tty_lock, MUTEX_DEFAULT, IPL_NONE);
    299 	rumpuser_mutex_recursive_init(&rump_giantlock);
    300 	ksyms_init();
    301 	uvm_init();
    302 	evcnt_init();
    303 
    304 	once_init();
    305 	kernconfig_lock_init();
    306 	prop_kern_init();
    307 
    308 	pool_subsystem_init();
    309 	kmem_init();
    310 
    311 	uvm_ra_init();
    312 	uao_init();
    313 
    314 	mutex_obj_init();
    315 	callout_startup();
    316 
    317 	kprintf_init();
    318 	loginit();
    319 
    320 	kauth_init();
    321 
    322 	procinit();
    323 	proc0_init();
    324 	uid_init();
    325 	chgproccnt(0, 1);
    326 
    327 	l->l_proc = &proc0;
    328 	lwp_update_creds(l);
    329 
    330 	lwpinit_specificdata();
    331 	lwp_initspecific(&lwp0);
    332 
    333 	rump_scheduler_init(numcpu);
    334 	/* revert temporary context and schedule a semireal context */
    335 	l->l_cpu = NULL;
    336 	rumpuser_set_curlwp(NULL);
    337 	initproc = &proc0; /* borrow proc0 before we get initproc started */
    338 	rump_schedule();
    339 
    340 	percpu_init();
    341 	inittimecounter();
    342 	ntp_init();
    343 
    344 	rumpuser_gettime(&sec, &nsec, &error);
    345 	ts.tv_sec = sec;
    346 	ts.tv_nsec = nsec;
    347 	tc_setclock(&ts);
    348 
    349 	/* we are mostly go.  do per-cpu subsystem init */
    350 	for (i = 0; i < numcpu; i++) {
    351 		struct cpu_info *ci = cpu_lookup(i);
    352 
    353 		/* attach non-bootstrap CPUs */
    354 		if (i > 0) {
    355 			rump_cpu_attach(ci);
    356 			ncpu++;
    357 		}
    358 
    359 		callout_init_cpu(ci);
    360 		softint_init(ci);
    361 		xc_init_cpu(ci);
    362 		pool_cache_cpu_init(ci);
    363 		selsysinit(ci);
    364 		percpu_init_cpu(ci);
    365 
    366 		aprint_verbose("cpu%d at thinair0: rump virtual cpu\n", i);
    367 	}
    368 
    369 	sysctl_init();
    370 	mksysctls();
    371 	kqueue_init();
    372 	iostat_init();
    373 	fd_sys_init();
    374 	module_init();
    375 	devsw_init();
    376 	pipe_init();
    377 	resource_init();
    378 
    379 	/* start page baroness */
    380 	if (rump_threads) {
    381 		if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL,
    382 		    uvm_pageout, NULL, &uvm.pagedaemon_lwp, "pdaemon") != 0)
    383 			panic("pagedaemon create failed");
    384 	} else
    385 		uvm.pagedaemon_lwp = NULL; /* doesn't match curlwp */
    386 
    387 	/* process dso's */
    388 	rumpuser_dl_bootstrap(add_linkedin_modules, rump_kernelfsym_load);
    389 
    390 	rump_component_init(RUMP_COMPONENT_KERN);
    391 
    392 	/* these do nothing if not present */
    393 	rump_vfs_init();
    394 	rump_net_init();
    395 	rump_dev_init();
    396 
    397 	rump_component_init(RUMP_COMPONENT_KERN_VFS);
    398 
    399 	cold = 0;
    400 
    401 	/* aieeeedondest */
    402 	if (rump_threads) {
    403 		if (workqueue_create(&uvm.aiodone_queue, "aiodoned",
    404 		    rump_aiodone_worker, NULL, 0, 0, WQ_MPSAFE))
    405 			panic("aiodoned");
    406 	}
    407 
    408 	sysctl_finalize();
    409 
    410 	module_init_class(MODULE_CLASS_ANY);
    411 
    412 	rumpuser_gethostname(hostname, MAXHOSTNAMELEN, &error);
    413 	hostnamelen = strlen(hostname);
    414 
    415 	sigemptyset(&sigcantmask);
    416 
    417 	if (rump_threads)
    418 		vmem_rehash_start();
    419 
    420 	/*
    421 	 * Create init, used to attach implicit threads in rump.
    422 	 * (note: must be done after vfsinit to get cwdi)
    423 	 */
    424 	(void)rump__lwproc_alloclwp(NULL); /* dummy thread for initproc */
    425 	mutex_enter(proc_lock);
    426 	initproc = proc_find_raw(1);
    427 	mutex_exit(proc_lock);
    428 	if (initproc == NULL)
    429 		panic("where in the world is initproc?");
    430 
    431 	/* release cpu */
    432 	rump_unschedule();
    433 
    434 	return 0;
    435 }
    436 
    437 void
    438 cpu_reboot(int howto, char *bootstr)
    439 {
    440 
    441 	/* dump means we really take the dive here */
    442 	if ((howto & RB_DUMP) || panicstr) {
    443 		rumpuser_exit(RUMPUSER_PANIC);
    444 		/*NOTREACHED*/
    445 	}
    446 
    447 	/* try to sync */
    448 	if (!((howto & RB_NOSYNC) || panicstr)) {
    449 		rump_vfs_fini();
    450 	}
    451 
    452 	/* your wish is my command */
    453 	if (howto & RB_HALT) {
    454 		printf("rump kernel halted\n");
    455 		for (;;) {
    456 			uint64_t sec = 5, nsec = 0;
    457 			int error;
    458 
    459 			rumpuser_nanosleep(&sec, &nsec, &error);
    460 		}
    461 	}
    462 
    463 	/* this function is __dead, we must exit */
    464 	rumpuser_exit(0);
    465 }
    466 
    467 struct uio *
    468 rump_uio_setup(void *buf, size_t bufsize, off_t offset, enum rump_uiorw rw)
    469 {
    470 	struct uio *uio;
    471 	enum uio_rw uiorw;
    472 
    473 	switch (rw) {
    474 	case RUMPUIO_READ:
    475 		uiorw = UIO_READ;
    476 		break;
    477 	case RUMPUIO_WRITE:
    478 		uiorw = UIO_WRITE;
    479 		break;
    480 	default:
    481 		panic("%s: invalid rw %d", __func__, rw);
    482 	}
    483 
    484 	uio = kmem_alloc(sizeof(struct uio), KM_SLEEP);
    485 	uio->uio_iov = kmem_alloc(sizeof(struct iovec), KM_SLEEP);
    486 
    487 	uio->uio_iov->iov_base = buf;
    488 	uio->uio_iov->iov_len = bufsize;
    489 
    490 	uio->uio_iovcnt = 1;
    491 	uio->uio_offset = offset;
    492 	uio->uio_resid = bufsize;
    493 	uio->uio_rw = uiorw;
    494 	UIO_SETUP_SYSSPACE(uio);
    495 
    496 	return uio;
    497 }
    498 
    499 size_t
    500 rump_uio_getresid(struct uio *uio)
    501 {
    502 
    503 	return uio->uio_resid;
    504 }
    505 
    506 off_t
    507 rump_uio_getoff(struct uio *uio)
    508 {
    509 
    510 	return uio->uio_offset;
    511 }
    512 
    513 size_t
    514 rump_uio_free(struct uio *uio)
    515 {
    516 	size_t resid;
    517 
    518 	resid = uio->uio_resid;
    519 	kmem_free(uio->uio_iov, sizeof(*uio->uio_iov));
    520 	kmem_free(uio, sizeof(*uio));
    521 
    522 	return resid;
    523 }
    524 
    525 kauth_cred_t
    526 rump_cred_create(uid_t uid, gid_t gid, size_t ngroups, gid_t *groups)
    527 {
    528 	kauth_cred_t cred;
    529 	int rv;
    530 
    531 	cred = kauth_cred_alloc();
    532 	kauth_cred_setuid(cred, uid);
    533 	kauth_cred_seteuid(cred, uid);
    534 	kauth_cred_setsvuid(cred, uid);
    535 	kauth_cred_setgid(cred, gid);
    536 	kauth_cred_setgid(cred, gid);
    537 	kauth_cred_setegid(cred, gid);
    538 	kauth_cred_setsvgid(cred, gid);
    539 	rv = kauth_cred_setgroups(cred, groups, ngroups, 0, UIO_SYSSPACE);
    540 	/* oh this is silly.  and by "this" I mean kauth_cred_setgroups() */
    541 	assert(rv == 0);
    542 
    543 	return cred;
    544 }
    545 
    546 void
    547 rump_cred_put(kauth_cred_t cred)
    548 {
    549 
    550 	kauth_cred_free(cred);
    551 }
    552 
    553 static int compcounter[RUMP_COMPONENT_MAX];
    554 
    555 static void
    556 rump_component_init_cb(struct rump_component *rc, int type)
    557 {
    558 
    559 	KASSERT(type < RUMP_COMPONENT_MAX);
    560 	if (rc->rc_type == type) {
    561 		rc->rc_init();
    562 		compcounter[type]++;
    563 	}
    564 }
    565 
    566 int
    567 rump_component_count(enum rump_component_type type)
    568 {
    569 
    570 	KASSERT(type <= RUMP_COMPONENT_MAX);
    571 	return compcounter[type];
    572 }
    573 
    574 void
    575 rump_component_init(enum rump_component_type type)
    576 {
    577 
    578 	rumpuser_dl_component_init(type, rump_component_init_cb);
    579 }
    580 
    581 /*
    582  * Initialize a module which has already been loaded and linked
    583  * with dlopen(). This is fundamentally the same as a builtin module.
    584  */
    585 int
    586 rump_module_init(const struct modinfo * const *mip, size_t nmodinfo)
    587 {
    588 
    589 	return module_builtin_add(mip, nmodinfo, true);
    590 }
    591 
    592 /*
    593  * Finish module (flawless victory, fatality!).
    594  */
    595 int
    596 rump_module_fini(const struct modinfo *mi)
    597 {
    598 
    599 	return module_builtin_remove(mi, true);
    600 }
    601 
    602 /*
    603  * Add loaded and linked module to the builtin list.  It will
    604  * later be initialized with module_init_class().
    605  */
    606 
    607 static void
    608 add_linkedin_modules(const struct modinfo * const *mip, size_t nmodinfo)
    609 {
    610 
    611 	module_builtin_add(mip, nmodinfo, false);
    612 }
    613 
    614 int
    615 rump_kernelfsym_load(void *symtab, uint64_t symsize,
    616 	char *strtab, uint64_t strsize)
    617 {
    618 	static int inited = 0;
    619 	Elf64_Ehdr ehdr;
    620 
    621 	if (inited)
    622 		return EBUSY;
    623 	inited = 1;
    624 
    625 	/*
    626 	 * Use 64bit header since it's bigger.  Shouldn't make a
    627 	 * difference, since we're passing in all zeroes anyway.
    628 	 */
    629 	memset(&ehdr, 0, sizeof(ehdr));
    630 	ksyms_addsyms_explicit(&ehdr, symtab, symsize, strtab, strsize);
    631 
    632 	return 0;
    633 }
    634 
    635 static int
    636 rump_proxy_syscall(int num, void *arg, register_t *retval)
    637 {
    638 	struct lwp *l;
    639 	struct sysent *callp;
    640 	int rv;
    641 
    642 	if (__predict_false(num >= SYS_NSYSENT))
    643 		return ENOSYS;
    644 
    645 	callp = rump_sysent + num;
    646 	l = curlwp;
    647 	rv = sy_call(callp, l, (void *)arg, retval);
    648 
    649 	return rv;
    650 }
    651 
    652 static int
    653 rump_proxy_newproc(void *priv)
    654 {
    655 	struct vmspace *newspace;
    656 	int error;
    657 
    658 	if ((error = rump_lwproc_newproc()) != 0)
    659 		return error;
    660 
    661 	/*
    662 	 * Since it's a proxy proc, adjust the vmspace.
    663 	 * Refcount will eternally be 1.
    664 	 */
    665 	newspace = kmem_alloc(sizeof(*newspace), KM_SLEEP);
    666 	newspace->vm_refcnt = 1;
    667 	newspace->vm_map.pmap = priv;
    668 	KASSERT(curproc->p_vmspace == vmspace_kernel());
    669 	curproc->p_vmspace = newspace;
    670 
    671 	return 0;
    672 }
    673 
    674 int
    675 rump_boot_gethowto()
    676 {
    677 
    678 	return boothowto;
    679 }
    680 
    681 void
    682 rump_boot_sethowto(int howto)
    683 {
    684 
    685 	boothowto = howto;
    686 }
    687 
    688 int
    689 rump_getversion(void)
    690 {
    691 
    692 	return __NetBSD_Version__;
    693 }
    694 
    695 /*
    696  * Note: may be called unscheduled.  Not fully safe since no locking
    697  * of allevents (currently that's not even available).
    698  */
    699 void
    700 rump_printevcnts()
    701 {
    702 	struct evcnt *ev;
    703 
    704 	TAILQ_FOREACH(ev, &allevents, ev_list)
    705 		rumpuser_dprintf("%s / %s: %" PRIu64 "\n",
    706 		    ev->ev_group, ev->ev_name, ev->ev_count);
    707 }
    708 
    709 /*
    710  * If you use this interface ... well ... all bets are off.
    711  * The original purpose is for the p2k fs server library to be
    712  * able to use the same pid/lid for VOPs as the host kernel.
    713  */
    714 void
    715 rump_allbetsareoff_setid(pid_t pid, int lid)
    716 {
    717 	struct lwp *l = curlwp;
    718 	struct proc *p = l->l_proc;
    719 
    720 	l->l_lid = lid;
    721 	p->p_pid = pid;
    722 }
    723