Home | History | Annotate | Line # | Download | only in rumpkern
rump.c revision 1.209 
      1 /*	$NetBSD: rump.c,v 1.209 2010/12/12 13:18:07 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 1.209 2010/12/12 13:18:07 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 device rump_rootdev = {
     92 	.dv_class = DV_VIRTUAL
     93 };
     94 
     95 #ifdef RUMP_WITHOUT_THREADS
     96 int rump_threads = 0;
     97 #else
     98 int rump_threads = 1;
     99 #endif
    100 
    101 static int rump_proxy_syscall(int, void *, register_t *);
    102 static int rump_proxy_newproc(void *);
    103 
    104 static char rump_msgbuf[16*1024]; /* 16k should be enough for std rump needs */
    105 
    106 static void
    107 rump_aiodone_worker(struct work *wk, void *dummy)
    108 {
    109 	struct buf *bp = (struct buf *)wk;
    110 
    111 	KASSERT(&bp->b_work == wk);
    112 	bp->b_iodone(bp);
    113 }
    114 
    115 static int rump_inited;
    116 
    117 /*
    118  * Make sure pnbuf_cache is available even without vfs
    119  */
    120 struct pool_cache *pnbuf_cache;
    121 int rump_initpnbufpool(void);
    122 int rump_initpnbufpool(void)
    123 {
    124 
    125         pnbuf_cache = pool_cache_init(MAXPATHLEN, 0, 0, 0, "pnbufpl",
    126 	    NULL, IPL_NONE, NULL, NULL, NULL);
    127 	return EOPNOTSUPP;
    128 }
    129 
    130 int rump__unavailable(void);
    131 int rump__unavailable() {return EOPNOTSUPP;}
    132 __weak_alias(rump_net_init,rump__unavailable);
    133 __weak_alias(rump_vfs_init,rump_initpnbufpool);
    134 __weak_alias(rump_dev_init,rump__unavailable);
    135 
    136 __weak_alias(rump_vfs_fini,rump__unavailable);
    137 
    138 __weak_alias(biodone,rump__unavailable);
    139 __weak_alias(sopoll,rump__unavailable);
    140 
    141 __weak_alias(rump_vfs_drainbufs,rump__unavailable);
    142 
    143 void rump__unavailable_vfs_panic(void);
    144 void rump__unavailable_vfs_panic() {panic("vfs component not available");}
    145 __weak_alias(usermount_common_policy,rump__unavailable_vfs_panic);
    146 
    147 rump_proc_vfs_init_fn rump_proc_vfs_init;
    148 rump_proc_vfs_release_fn rump_proc_vfs_release;
    149 
    150 static void add_linkedin_modules(const struct modinfo *const *, size_t);
    151 
    152 static void __noinline
    153 messthestack(void)
    154 {
    155 	volatile uint32_t mess[64];
    156 	uint64_t d1, d2;
    157 	int i, error;
    158 
    159 	for (i = 0; i < 64; i++) {
    160 		rumpuser_gettime(&d1, &d2, &error);
    161 		mess[i] = d2;
    162 	}
    163 }
    164 
    165 /*
    166  * Create kern.hostname.  why only this you ask.  well, init_sysctl
    167  * is a kitchen sink in need of some gardening.  but i want to use
    168  * kern.hostname today.
    169  */
    170 static void
    171 mksysctls(void)
    172 {
    173 
    174 	sysctl_createv(NULL, 0, NULL, NULL,
    175 	    CTLFLAG_PERMANENT, CTLTYPE_NODE, "kern", NULL,
    176 	    NULL, 0, NULL, 0, CTL_KERN, CTL_EOL);
    177 
    178 	/* XXX: setting hostnamelen is missing */
    179 	sysctl_createv(NULL, 0, NULL, NULL,
    180 	    CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_STRING, "hostname",
    181 	    SYSCTL_DESCR("System hostname"), NULL, 0,
    182 	    &hostname, MAXHOSTNAMELEN, CTL_KERN, KERN_HOSTNAME, CTL_EOL);
    183 }
    184 
    185 /* there's no convenient kernel entry point for this, so just craft out own */
    186 static pid_t
    187 spgetpid(void)
    188 {
    189 
    190 	return curproc->p_pid;
    191 }
    192 
    193 static const struct rumpuser_sp_ops spops = {
    194 	.spop_schedule		= rump_schedule,
    195 	.spop_unschedule	= rump_unschedule,
    196 	.spop_lwproc_switch	= rump_lwproc_switch,
    197 	.spop_lwproc_release	= rump_lwproc_releaselwp,
    198 	.spop_lwproc_newproc	= rump_proxy_newproc,
    199 	.spop_lwproc_newlwp	= rump_lwproc_newlwp,
    200 	.spop_lwproc_curlwp	= rump_lwproc_curlwp,
    201 	.spop_syscall		= rump_proxy_syscall,
    202 	.spop_getpid		= spgetpid,
    203 };
    204 
    205 int
    206 rump_daemonize_begin(void)
    207 {
    208 
    209 	if (rump_inited)
    210 		return EALREADY;
    211 
    212 	return rumpuser_daemonize_begin();
    213 }
    214 
    215 int
    216 rump_daemonize_done(int error)
    217 {
    218 
    219 	return rumpuser_daemonize_done(error);
    220 }
    221 
    222 int
    223 rump__init(int rump_version)
    224 {
    225 	char buf[256];
    226 	struct timespec ts;
    227 	uint64_t sec, nsec;
    228 	struct lwp *l;
    229 	int i, numcpu;
    230 	int error;
    231 
    232 	/* not reentrant */
    233 	if (rump_inited)
    234 		return 0;
    235 	else if (rump_inited == -1)
    236 		panic("rump_init: host process restart required");
    237 	else
    238 		rump_inited = 1;
    239 
    240 	if (rumpuser_getversion() != RUMPUSER_VERSION) {
    241 		/* let's hope the ABI of rumpuser_dprintf is the same ;) */
    242 		rumpuser_dprintf("rumpuser version mismatch: %d vs. %d\n",
    243 		    rumpuser_getversion(), RUMPUSER_VERSION);
    244 		return EPROGMISMATCH;
    245 	}
    246 
    247 	if (rumpuser_getenv("RUMP_VERBOSE", buf, sizeof(buf), &error) == 0) {
    248 		if (*buf != '0')
    249 			boothowto = AB_VERBOSE;
    250 	}
    251 
    252 	if (rumpuser_getenv("RUMP_NCPU", buf, sizeof(buf), &error) == 0)
    253 		error = 0;
    254 	/* non-x86 is missing CPU_INFO_FOREACH() support */
    255 #ifdef RUMP_SMP
    256 	if (error == 0) {
    257 		numcpu = strtoll(buf, NULL, 10);
    258 		if (numcpu < 1)
    259 			numcpu = 1;
    260 	} else {
    261 		numcpu = rumpuser_getnhostcpu();
    262 	}
    263 #else
    264 	if (error == 0)
    265 		printf("NCPU limited to 1 on this machine architecture\n");
    266 	numcpu = 1;
    267 #endif
    268 	rump_cpus_bootstrap(&numcpu);
    269 
    270 	rumpuser_gettime(&sec, &nsec, &error);
    271 	boottime.tv_sec = sec;
    272 	boottime.tv_nsec = nsec;
    273 
    274 	initmsgbuf(rump_msgbuf, sizeof(rump_msgbuf));
    275 	aprint_verbose("%s%s", copyright, version);
    276 
    277 	/*
    278 	 * Seed arc4random() with a "reasonable" amount of randomness.
    279 	 * Yes, this is a quick kludge which depends on the arc4random
    280 	 * implementation.
    281 	 */
    282 	messthestack();
    283 	arc4random();
    284 
    285 	if (rump_version != RUMP_VERSION) {
    286 		printf("rump version mismatch, %d vs. %d\n",
    287 		    rump_version, RUMP_VERSION);
    288 		return EPROGMISMATCH;
    289 	}
    290 
    291 	if (rumpuser_getenv("RUMP_THREADS", buf, sizeof(buf), &error) == 0) {
    292 		rump_threads = *buf != '0';
    293 	}
    294 	rumpuser_thrinit(rump_user_schedule, rump_user_unschedule,
    295 	    rump_threads);
    296 	rump_intr_init(numcpu);
    297 	rump_tsleep_init();
    298 
    299 	/* init minimal lwp/cpu context */
    300 	l = &lwp0;
    301 	l->l_lid = 1;
    302 	l->l_cpu = l->l_target_cpu = rump_cpu;
    303 	l->l_fd = &filedesc0;
    304 	rumpuser_set_curlwp(l);
    305 
    306 	mutex_init(&tty_lock, MUTEX_DEFAULT, IPL_NONE);
    307 	rumpuser_mutex_init(&rump_giantlock);
    308 	ksyms_init();
    309 	uvm_init();
    310 	evcnt_init();
    311 
    312 	once_init();
    313 	kernconfig_lock_init();
    314 	prop_kern_init();
    315 
    316 	pool_subsystem_init();
    317 	kmem_init();
    318 
    319 	uvm_ra_init();
    320 	uao_init();
    321 
    322 	mutex_obj_init();
    323 	callout_startup();
    324 
    325 	kprintf_init();
    326 	loginit();
    327 
    328 	kauth_init();
    329 
    330 	procinit();
    331 	proc0_init();
    332 	uid_init();
    333 	chgproccnt(0, 1);
    334 
    335 	l->l_proc = &proc0;
    336 	lwp_update_creds(l);
    337 
    338 	lwpinit_specificdata();
    339 	lwp_initspecific(&lwp0);
    340 
    341 	rump_scheduler_init(numcpu);
    342 	/* revert temporary context and schedule a semireal context */
    343 	l->l_cpu = NULL;
    344 	rumpuser_set_curlwp(NULL);
    345 	initproc = &proc0; /* borrow proc0 before we get initproc started */
    346 	rump_schedule();
    347 
    348 	percpu_init();
    349 	inittimecounter();
    350 	ntp_init();
    351 
    352 	rumpuser_gettime(&sec, &nsec, &error);
    353 	ts.tv_sec = sec;
    354 	ts.tv_nsec = nsec;
    355 	tc_setclock(&ts);
    356 
    357 	/* we are mostly go.  do per-cpu subsystem init */
    358 	for (i = 0; i < numcpu; i++) {
    359 		struct cpu_info *ci = cpu_lookup(i);
    360 
    361 		/* attach non-bootstrap CPUs */
    362 		if (i > 0) {
    363 			rump_cpu_attach(ci);
    364 			ncpu++;
    365 		}
    366 
    367 		callout_init_cpu(ci);
    368 		softint_init(ci);
    369 		xc_init_cpu(ci);
    370 		pool_cache_cpu_init(ci);
    371 		selsysinit(ci);
    372 		percpu_init_cpu(ci);
    373 
    374 		aprint_verbose("cpu%d at thinair0: rump virtual cpu\n", i);
    375 	}
    376 
    377 	sysctl_init();
    378 	mksysctls();
    379 	kqueue_init();
    380 	iostat_init();
    381 	fd_sys_init();
    382 	module_init();
    383 	devsw_init();
    384 	pipe_init();
    385 	resource_init();
    386 
    387 	/* start page baroness */
    388 	if (rump_threads) {
    389 		if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL,
    390 		    uvm_pageout, NULL, &uvm.pagedaemon_lwp, "pdaemon") != 0)
    391 			panic("pagedaemon create failed");
    392 	} else
    393 		uvm.pagedaemon_lwp = NULL; /* doesn't match curlwp */
    394 
    395 	/* process dso's */
    396 	rumpuser_dl_bootstrap(add_linkedin_modules, rump_kernelfsym_load);
    397 
    398 	rump_component_init(RUMP_COMPONENT_KERN);
    399 
    400 	/* these do nothing if not present */
    401 	rump_vfs_init();
    402 	rump_net_init();
    403 	rump_dev_init();
    404 
    405 	rump_component_init(RUMP_COMPONENT_KERN_VFS);
    406 
    407 	cold = 0;
    408 
    409 	/* aieeeedondest */
    410 	if (rump_threads) {
    411 		if (workqueue_create(&uvm.aiodone_queue, "aiodoned",
    412 		    rump_aiodone_worker, NULL, 0, 0, WQ_MPSAFE))
    413 			panic("aiodoned");
    414 	}
    415 
    416 	sysctl_finalize();
    417 
    418 	module_init_class(MODULE_CLASS_ANY);
    419 
    420 	rumpuser_gethostname(hostname, MAXHOSTNAMELEN, &error);
    421 	hostnamelen = strlen(hostname);
    422 
    423 	sigemptyset(&sigcantmask);
    424 
    425 	if (rump_threads)
    426 		vmem_rehash_start();
    427 
    428 	/*
    429 	 * Create init, used to attach implicit threads in rump.
    430 	 * (note: must be done after vfsinit to get cwdi)
    431 	 */
    432 	(void)rump__lwproc_alloclwp(NULL); /* dummy thread for initproc */
    433 	mutex_enter(proc_lock);
    434 	initproc = proc_find_raw(1);
    435 	mutex_exit(proc_lock);
    436 	if (initproc == NULL)
    437 		panic("where in the world is initproc?");
    438 
    439 	/* release cpu */
    440 	rump_unschedule();
    441 
    442 	return 0;
    443 }
    444 
    445 int
    446 rump_init_server(const char *url)
    447 {
    448 
    449 	return rumpuser_sp_init(&spops, url);
    450 }
    451 
    452 void
    453 cpu_reboot(int howto, char *bootstr)
    454 {
    455 	int ruhow = 0;
    456 
    457 	printf("rump kernel halting...\n");
    458 
    459 	/* dump means we really take the dive here */
    460 	if ((howto & RB_DUMP) || panicstr) {
    461 		ruhow = RUMPUSER_PANIC;
    462 		goto out;
    463 	}
    464 
    465 	/* try to sync */
    466 	if (!((howto & RB_NOSYNC) || panicstr)) {
    467 		rump_vfs_fini();
    468 	}
    469 
    470 	/* your wish is my command */
    471 	if (howto & RB_HALT) {
    472 		printf("rump kernel halted\n");
    473 		for (;;) {
    474 			uint64_t sec = 5, nsec = 0;
    475 			int error;
    476 
    477 			rumpuser_nanosleep(&sec, &nsec, &error);
    478 		}
    479 	}
    480 
    481 	/* this function is __dead, we must exit */
    482  out:
    483 	printf("halted\n");
    484 	rumpuser_exit(ruhow);
    485 }
    486 
    487 struct uio *
    488 rump_uio_setup(void *buf, size_t bufsize, off_t offset, enum rump_uiorw rw)
    489 {
    490 	struct uio *uio;
    491 	enum uio_rw uiorw;
    492 
    493 	switch (rw) {
    494 	case RUMPUIO_READ:
    495 		uiorw = UIO_READ;
    496 		break;
    497 	case RUMPUIO_WRITE:
    498 		uiorw = UIO_WRITE;
    499 		break;
    500 	default:
    501 		panic("%s: invalid rw %d", __func__, rw);
    502 	}
    503 
    504 	uio = kmem_alloc(sizeof(struct uio), KM_SLEEP);
    505 	uio->uio_iov = kmem_alloc(sizeof(struct iovec), KM_SLEEP);
    506 
    507 	uio->uio_iov->iov_base = buf;
    508 	uio->uio_iov->iov_len = bufsize;
    509 
    510 	uio->uio_iovcnt = 1;
    511 	uio->uio_offset = offset;
    512 	uio->uio_resid = bufsize;
    513 	uio->uio_rw = uiorw;
    514 	UIO_SETUP_SYSSPACE(uio);
    515 
    516 	return uio;
    517 }
    518 
    519 size_t
    520 rump_uio_getresid(struct uio *uio)
    521 {
    522 
    523 	return uio->uio_resid;
    524 }
    525 
    526 off_t
    527 rump_uio_getoff(struct uio *uio)
    528 {
    529 
    530 	return uio->uio_offset;
    531 }
    532 
    533 size_t
    534 rump_uio_free(struct uio *uio)
    535 {
    536 	size_t resid;
    537 
    538 	resid = uio->uio_resid;
    539 	kmem_free(uio->uio_iov, sizeof(*uio->uio_iov));
    540 	kmem_free(uio, sizeof(*uio));
    541 
    542 	return resid;
    543 }
    544 
    545 kauth_cred_t
    546 rump_cred_create(uid_t uid, gid_t gid, size_t ngroups, gid_t *groups)
    547 {
    548 	kauth_cred_t cred;
    549 	int rv;
    550 
    551 	cred = kauth_cred_alloc();
    552 	kauth_cred_setuid(cred, uid);
    553 	kauth_cred_seteuid(cred, uid);
    554 	kauth_cred_setsvuid(cred, uid);
    555 	kauth_cred_setgid(cred, gid);
    556 	kauth_cred_setgid(cred, gid);
    557 	kauth_cred_setegid(cred, gid);
    558 	kauth_cred_setsvgid(cred, gid);
    559 	rv = kauth_cred_setgroups(cred, groups, ngroups, 0, UIO_SYSSPACE);
    560 	/* oh this is silly.  and by "this" I mean kauth_cred_setgroups() */
    561 	assert(rv == 0);
    562 
    563 	return cred;
    564 }
    565 
    566 void
    567 rump_cred_put(kauth_cred_t cred)
    568 {
    569 
    570 	kauth_cred_free(cred);
    571 }
    572 
    573 static int compcounter[RUMP_COMPONENT_MAX];
    574 
    575 static void
    576 rump_component_init_cb(struct rump_component *rc, int type)
    577 {
    578 
    579 	KASSERT(type < RUMP_COMPONENT_MAX);
    580 	if (rc->rc_type == type) {
    581 		rc->rc_init();
    582 		compcounter[type]++;
    583 	}
    584 }
    585 
    586 int
    587 rump_component_count(enum rump_component_type type)
    588 {
    589 
    590 	KASSERT(type <= RUMP_COMPONENT_MAX);
    591 	return compcounter[type];
    592 }
    593 
    594 void
    595 rump_component_init(enum rump_component_type type)
    596 {
    597 
    598 	rumpuser_dl_component_init(type, rump_component_init_cb);
    599 }
    600 
    601 /*
    602  * Initialize a module which has already been loaded and linked
    603  * with dlopen(). This is fundamentally the same as a builtin module.
    604  */
    605 int
    606 rump_module_init(const struct modinfo * const *mip, size_t nmodinfo)
    607 {
    608 
    609 	return module_builtin_add(mip, nmodinfo, true);
    610 }
    611 
    612 /*
    613  * Finish module (flawless victory, fatality!).
    614  */
    615 int
    616 rump_module_fini(const struct modinfo *mi)
    617 {
    618 
    619 	return module_builtin_remove(mi, true);
    620 }
    621 
    622 /*
    623  * Add loaded and linked module to the builtin list.  It will
    624  * later be initialized with module_init_class().
    625  */
    626 
    627 static void
    628 add_linkedin_modules(const struct modinfo * const *mip, size_t nmodinfo)
    629 {
    630 
    631 	module_builtin_add(mip, nmodinfo, false);
    632 }
    633 
    634 int
    635 rump_kernelfsym_load(void *symtab, uint64_t symsize,
    636 	char *strtab, uint64_t strsize)
    637 {
    638 	static int inited = 0;
    639 	Elf64_Ehdr ehdr;
    640 
    641 	if (inited)
    642 		return EBUSY;
    643 	inited = 1;
    644 
    645 	/*
    646 	 * Use 64bit header since it's bigger.  Shouldn't make a
    647 	 * difference, since we're passing in all zeroes anyway.
    648 	 */
    649 	memset(&ehdr, 0, sizeof(ehdr));
    650 	ksyms_addsyms_explicit(&ehdr, symtab, symsize, strtab, strsize);
    651 
    652 	return 0;
    653 }
    654 
    655 static int
    656 rump_proxy_syscall(int num, void *arg, register_t *retval)
    657 {
    658 	struct lwp *l;
    659 	struct sysent *callp;
    660 	int rv;
    661 
    662 	if (__predict_false(num >= SYS_NSYSENT))
    663 		return ENOSYS;
    664 
    665 	callp = rump_sysent + num;
    666 	l = curlwp;
    667 	rv = sy_call(callp, l, (void *)arg, retval);
    668 
    669 	return rv;
    670 }
    671 
    672 static int
    673 rump_proxy_newproc(void *priv)
    674 {
    675 	struct vmspace *newspace;
    676 	int error;
    677 
    678 	if ((error = rump_lwproc_newproc()) != 0)
    679 		return error;
    680 
    681 	/*
    682 	 * Since it's a proxy proc, adjust the vmspace.
    683 	 * Refcount will eternally be 1.
    684 	 */
    685 	newspace = kmem_alloc(sizeof(*newspace), KM_SLEEP);
    686 	newspace->vm_refcnt = 1;
    687 	newspace->vm_map.pmap = priv;
    688 	KASSERT(curproc->p_vmspace == vmspace_kernel());
    689 	curproc->p_vmspace = newspace;
    690 
    691 	return 0;
    692 }
    693 
    694 int
    695 rump_boot_gethowto()
    696 {
    697 
    698 	return boothowto;
    699 }
    700 
    701 void
    702 rump_boot_sethowto(int howto)
    703 {
    704 
    705 	boothowto = howto;
    706 }
    707 
    708 int
    709 rump_getversion(void)
    710 {
    711 
    712 	return __NetBSD_Version__;
    713 }
    714 
    715 /*
    716  * Note: may be called unscheduled.  Not fully safe since no locking
    717  * of allevents (currently that's not even available).
    718  */
    719 void
    720 rump_printevcnts()
    721 {
    722 	struct evcnt *ev;
    723 
    724 	TAILQ_FOREACH(ev, &allevents, ev_list)
    725 		rumpuser_dprintf("%s / %s: %" PRIu64 "\n",
    726 		    ev->ev_group, ev->ev_name, ev->ev_count);
    727 }
    728 
    729 /*
    730  * If you use this interface ... well ... all bets are off.
    731  * The original purpose is for the p2k fs server library to be
    732  * able to use the same pid/lid for VOPs as the host kernel.
    733  */
    734 void
    735 rump_allbetsareoff_setid(pid_t pid, int lid)
    736 {
    737 	struct lwp *l = curlwp;
    738 	struct proc *p = l->l_proc;
    739 
    740 	l->l_lid = lid;
    741 	p->p_pid = pid;
    742 }
    743