rump.c revision 1.94
1 /* $NetBSD: rump.c,v 1.94 2009/02/12 14:46:58 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 1.94 2009/02/12 14:46:58 pooka Exp $"); 32 33 #include <sys/param.h> 34 #include <sys/atomic.h> 35 #include <sys/buf.h> 36 #include <sys/callout.h> 37 #include <sys/conf.h> 38 #include <sys/cpu.h> 39 #include <sys/filedesc.h> 40 #include <sys/iostat.h> 41 #include <sys/kauth.h> 42 #include <sys/kernel.h> 43 #include <sys/kmem.h> 44 #include <sys/kprintf.h> 45 #include <sys/ksyms.h> 46 #include <sys/msgbuf.h> 47 #include <sys/module.h> 48 #include <sys/once.h> 49 #include <sys/percpu.h> 50 #include <sys/queue.h> 51 #include <sys/resourcevar.h> 52 #include <sys/select.h> 53 #include <sys/sysctl.h> 54 #include <sys/tty.h> 55 #include <sys/uidinfo.h> 56 #include <sys/vmem.h> 57 58 #include <rump/rumpuser.h> 59 60 #include "rump_private.h" 61 #include "rump_net_private.h" 62 #include "rump_vfs_private.h" 63 64 struct proc proc0; 65 struct session rump_session = { 66 .s_count = 1, 67 .s_flags = 0, 68 .s_leader = &proc0, 69 .s_login = "rumphobo", 70 .s_sid = 0, 71 }; 72 struct pgrp rump_pgrp = { 73 .pg_members = LIST_HEAD_INITIALIZER(pg_members), 74 .pg_session = &rump_session, 75 .pg_jobc = 1, 76 }; 77 struct pstats rump_stats; 78 struct plimit rump_limits; 79 struct cpu_info rump_cpu; 80 struct filedesc rump_filedesc0; 81 struct proclist allproc; 82 char machine[] = "rump"; 83 static kauth_cred_t rump_susercred; 84 85 struct rumpuser_mtx *rump_giantlock; 86 87 sigset_t sigcantmask; 88 89 #ifdef RUMP_WITHOUT_THREADS 90 int rump_threads = 0; 91 #else 92 int rump_threads = 1; 93 #endif 94 95 static void 96 rump_aiodone_worker(struct work *wk, void *dummy) 97 { 98 struct buf *bp = (struct buf *)wk; 99 100 KASSERT(&bp->b_work == wk); 101 bp->b_iodone(bp); 102 } 103 104 static int rump_inited; 105 static struct emul emul_rump; 106 107 void rump__unavailable(void); 108 void rump__unavailable() {} 109 __weak_alias(rump_net_init,rump__unavailable); 110 __weak_alias(rump_vfs_init,rump__unavailable); 111 112 void rump__unavailable_vfs_panic(void); 113 void rump__unavailable_vfs_panic() {panic("vfs component not available");} 114 __weak_alias(vn_open,rump__unavailable_vfs_panic); 115 __weak_alias(vn_rdwr,rump__unavailable_vfs_panic); 116 __weak_alias(vn_close,rump__unavailable_vfs_panic); 117 118 static void 119 pvfsinit_nop(struct proc *p) 120 { 121 122 return; 123 } 124 125 static void 126 pvfsrele_nop(struct proc *p) 127 { 128 129 return; 130 } 131 132 rump_proc_vfs_init_fn rump_proc_vfs_init = pvfsinit_nop; 133 rump_proc_vfs_release_fn rump_proc_vfs_release = pvfsrele_nop; 134 135 int 136 rump__init(int rump_version) 137 { 138 char buf[256]; 139 struct proc *p; 140 struct lwp *l; 141 int error; 142 143 /* XXX */ 144 if (rump_inited) 145 return 0; 146 rump_inited = 1; 147 148 if (rump_version != RUMP_VERSION) { 149 printf("rump version mismatch, %d vs. %d\n", 150 rump_version, RUMP_VERSION); 151 return EPROGMISMATCH; 152 } 153 154 if (rumpuser_getenv("RUMP_THREADS", buf, sizeof(buf), &error) == 0) { 155 rump_threads = *buf != '0'; 156 } 157 rumpuser_thrinit(_kernel_lock, _kernel_unlock, rump_threads); 158 159 mutex_init(&tty_lock, MUTEX_DEFAULT, IPL_NONE); 160 rumpuser_mutex_recursive_init(&rump_giantlock); 161 ksyms_init(); 162 rumpvm_init(); 163 164 once_init(); 165 166 rump_sleepers_init(); 167 #ifdef RUMP_USE_REAL_ALLOCATORS 168 pool_subsystem_init(); 169 kmem_init(); 170 #endif 171 kprintf_init(); 172 loginit(); 173 174 kauth_init(); 175 rump_susercred = rump_cred_create(0, 0, 0, NULL); 176 177 l = &lwp0; 178 p = &proc0; 179 p->p_stats = &rump_stats; 180 p->p_limit = &rump_limits; 181 p->p_pgrp = &rump_pgrp; 182 p->p_pid = 0; 183 p->p_fd = &rump_filedesc0; 184 p->p_vmspace = &rump_vmspace; 185 p->p_emul = &emul_rump; 186 p->p_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NONE); 187 l->l_cred = rump_cred_suserget(); 188 l->l_proc = p; 189 l->l_lid = 1; 190 LIST_INSERT_HEAD(&allproc, p, p_list); 191 proc_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NONE); 192 193 rump_limits.pl_rlimit[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY; 194 rump_limits.pl_rlimit[RLIMIT_NOFILE].rlim_cur = RLIM_INFINITY; 195 rump_limits.pl_rlimit[RLIMIT_SBSIZE].rlim_cur = RLIM_INFINITY; 196 197 callout_startup(); 198 callout_init_cpu(&rump_cpu); 199 200 iostat_init(); 201 uid_init(); 202 percpu_init(); 203 fd_sys_init(); 204 module_init(); 205 sysctl_init(); 206 softint_init(&rump_cpu); 207 cold = 0; 208 devsw_init(); 209 210 /* these do nothing if not present */ 211 rump_vfs_init(); 212 rump_net_init(); 213 214 /* aieeeedondest */ 215 if (rump_threads) { 216 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 217 rump_aiodone_worker, NULL, 0, 0, 0)) 218 panic("aiodoned"); 219 } 220 221 rumpuser_gethostname(hostname, MAXHOSTNAMELEN, &error); 222 hostnamelen = strlen(hostname); 223 224 sigemptyset(&sigcantmask); 225 226 lwp0.l_fd = proc0.p_fd = fd_init(&rump_filedesc0); 227 228 #ifdef RUMP_USE_REAL_ALLOCATORS 229 if (rump_threads) 230 vmem_rehash_start(); 231 #endif 232 233 return 0; 234 } 235 236 struct uio * 237 rump_uio_setup(void *buf, size_t bufsize, off_t offset, enum rump_uiorw rw) 238 { 239 struct uio *uio; 240 enum uio_rw uiorw; 241 242 switch (rw) { 243 case RUMPUIO_READ: 244 uiorw = UIO_READ; 245 break; 246 case RUMPUIO_WRITE: 247 uiorw = UIO_WRITE; 248 break; 249 default: 250 panic("%s: invalid rw %d", __func__, rw); 251 } 252 253 uio = kmem_alloc(sizeof(struct uio), KM_SLEEP); 254 uio->uio_iov = kmem_alloc(sizeof(struct iovec), KM_SLEEP); 255 256 uio->uio_iov->iov_base = buf; 257 uio->uio_iov->iov_len = bufsize; 258 259 uio->uio_iovcnt = 1; 260 uio->uio_offset = offset; 261 uio->uio_resid = bufsize; 262 uio->uio_rw = uiorw; 263 uio->uio_vmspace = UIO_VMSPACE_SYS; 264 265 return uio; 266 } 267 268 size_t 269 rump_uio_getresid(struct uio *uio) 270 { 271 272 return uio->uio_resid; 273 } 274 275 off_t 276 rump_uio_getoff(struct uio *uio) 277 { 278 279 return uio->uio_offset; 280 } 281 282 size_t 283 rump_uio_free(struct uio *uio) 284 { 285 size_t resid; 286 287 resid = uio->uio_resid; 288 kmem_free(uio->uio_iov, sizeof(*uio->uio_iov)); 289 kmem_free(uio, sizeof(*uio)); 290 291 return resid; 292 } 293 294 struct lwp * 295 rump_setup_curlwp(pid_t pid, lwpid_t lid, int set) 296 { 297 struct lwp *l; 298 struct proc *p; 299 300 l = kmem_zalloc(sizeof(struct lwp), KM_SLEEP); 301 if (pid != 0) { 302 p = kmem_zalloc(sizeof(struct proc), KM_SLEEP); 303 rump_proc_vfs_init(p); 304 p->p_stats = &rump_stats; 305 p->p_limit = &rump_limits; 306 p->p_pid = pid; 307 p->p_vmspace = &rump_vmspace; 308 p->p_fd = fd_init(NULL); 309 } else { 310 p = &proc0; 311 } 312 313 l->l_cred = rump_cred_suserget(); 314 l->l_proc = p; 315 l->l_lid = lid; 316 l->l_fd = p->p_fd; 317 l->l_mutex = RUMP_LMUTEX_MAGIC; 318 l->l_cpu = &rump_cpu; 319 320 if (set) 321 rumpuser_set_curlwp(l); 322 323 return l; 324 } 325 326 void 327 rump_clear_curlwp() 328 { 329 struct lwp *l; 330 331 l = rumpuser_get_curlwp(); 332 if (l->l_proc->p_pid != 0) { 333 fd_free(); 334 rump_proc_vfs_release(l->l_proc); 335 rump_cred_destroy(l->l_cred); 336 kmem_free(l->l_proc, sizeof(*l->l_proc)); 337 } 338 kmem_free(l, sizeof(*l)); 339 rumpuser_set_curlwp(NULL); 340 } 341 342 struct lwp * 343 rump_get_curlwp() 344 { 345 struct lwp *l; 346 347 l = rumpuser_get_curlwp(); 348 if (l == NULL) 349 l = &lwp0; 350 351 return l; 352 } 353 354 kauth_cred_t 355 rump_cred_create(uid_t uid, gid_t gid, size_t ngroups, gid_t *groups) 356 { 357 kauth_cred_t cred; 358 int rv; 359 360 cred = kauth_cred_alloc(); 361 kauth_cred_setuid(cred, uid); 362 kauth_cred_seteuid(cred, uid); 363 kauth_cred_setsvuid(cred, uid); 364 kauth_cred_setgid(cred, gid); 365 kauth_cred_setgid(cred, gid); 366 kauth_cred_setegid(cred, gid); 367 kauth_cred_setsvgid(cred, gid); 368 rv = kauth_cred_setgroups(cred, groups, ngroups, 0, UIO_SYSSPACE); 369 /* oh this is silly. and by "this" I mean kauth_cred_setgroups() */ 370 assert(rv == 0); 371 372 return cred; 373 } 374 375 void 376 rump_cred_destroy(kauth_cred_t cred) 377 { 378 379 kauth_cred_free(cred); 380 } 381 382 kauth_cred_t 383 rump_cred_suserget() 384 { 385 386 kauth_cred_hold(rump_susercred); 387 return rump_susercred; 388 } 389 390 /* 391 * Return the next system lwpid 392 */ 393 lwpid_t 394 rump_nextlid() 395 { 396 lwpid_t retid; 397 398 mutex_enter(proc0.p_lock); 399 /* 400 * Take next one, don't return 0 401 * XXX: most likely we'll have collisions in case this 402 * wraps around. 403 */ 404 if (++proc0.p_nlwpid == 0) 405 ++proc0.p_nlwpid; 406 retid = proc0.p_nlwpid; 407 mutex_exit(proc0.p_lock); 408 409 return retid; 410 } 411 412 int 413 rump_module_load(struct modinfo **mi) 414 { 415 416 if (!module_compatible((*mi)->mi_version, __NetBSD_Version__)) 417 return EPROGMISMATCH; 418 419 return (*mi)->mi_modcmd(MODULE_CMD_INIT, NULL); 420 } 421 422 int _syspuffs_stub(int, int *); 423 int 424 _syspuffs_stub(int fd, int *newfd) 425 { 426 427 return ENODEV; 428 } 429 __weak_alias(rump_syspuffs_glueinit,_syspuffs_stub); 430
Indexes created Sun Sep 28 16:09:52 GMT 2025