1 /* $NetBSD: nfs_syscalls.c,v 1.156 2015/06/22 10:35:00 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_syscalls.c 8.5 (Berkeley) 3/30/95 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: nfs_syscalls.c,v 1.156 2015/06/22 10:35:00 mrg Exp $"); 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/kernel.h> 43 #include <sys/file.h> 44 #include <sys/stat.h> 45 #include <sys/vnode.h> 46 #include <sys/mount.h> 47 #include <sys/proc.h> 48 #include <sys/uio.h> 49 #include <sys/malloc.h> 50 #include <sys/kmem.h> 51 #include <sys/buf.h> 52 #include <sys/mbuf.h> 53 #include <sys/socket.h> 54 #include <sys/socketvar.h> 55 #include <sys/signalvar.h> 56 #include <sys/domain.h> 57 #include <sys/protosw.h> 58 #include <sys/namei.h> 59 #include <sys/syslog.h> 60 #include <sys/filedesc.h> 61 #include <sys/kthread.h> 62 #include <sys/kauth.h> 63 #include <sys/syscallargs.h> 64 65 #include <netinet/in.h> 66 #include <netinet/tcp.h> 67 #include <nfs/xdr_subs.h> 68 #include <nfs/rpcv2.h> 69 #include <nfs/nfsproto.h> 70 #include <nfs/nfs.h> 71 #include <nfs/nfsm_subs.h> 72 #include <nfs/nfsrvcache.h> 73 #include <nfs/nfsmount.h> 74 #include <nfs/nfsnode.h> 75 #include <nfs/nfsrtt.h> 76 #include <nfs/nfs_var.h> 77 78 extern int32_t (*nfsrv3_procs[NFS_NPROCS])(struct nfsrv_descript *, 79 struct nfssvc_sock *, 80 struct lwp *, struct mbuf **); 81 extern int nfsrvw_procrastinate; 82 extern int nuidhash_max; 83 84 static int nfs_numnfsd = 0; 85 static struct nfsdrt nfsdrt; 86 kmutex_t nfsd_lock; 87 struct nfssvc_sockhead nfssvc_sockhead; 88 kcondvar_t nfsd_initcv; 89 struct nfssvc_sockhead nfssvc_sockpending; 90 struct nfsdhead nfsd_head; 91 struct nfsdidlehead nfsd_idle_head; 92 93 int nfssvc_sockhead_flag; 94 int nfsd_head_flag; 95 96 struct nfssvc_sock *nfs_udpsock; 97 struct nfssvc_sock *nfs_udp6sock; 98 99 static struct nfssvc_sock *nfsrv_sockalloc(void); 100 static void nfsrv_sockfree(struct nfssvc_sock *); 101 static void nfsd_rt(int, struct nfsrv_descript *, int); 102 static int nfssvc_nfsd(struct nfssvc_copy_ops *, struct nfsd_srvargs *, void *, 103 struct lwp *); 104 105 static int nfssvc_addsock_in(struct nfsd_args *, const void *); 106 static int nfssvc_setexports_in(struct mountd_exports_list *, const void *); 107 static int nfssvc_nsd_in(struct nfsd_srvargs *, const void *); 108 static int nfssvc_nsd_out(void *, const struct nfsd_srvargs *); 109 static int nfssvc_exp_in(struct export_args *, const void *, size_t); 110 111 static int 112 nfssvc_addsock_in(struct nfsd_args *nfsdarg, const void *argp) 113 { 114 115 return copyin(argp, nfsdarg, sizeof *nfsdarg); 116 } 117 118 static int 119 nfssvc_setexports_in(struct mountd_exports_list *mel, const void *argp) 120 { 121 122 return copyin(argp, mel, sizeof *mel); 123 } 124 125 static int 126 nfssvc_nsd_in(struct nfsd_srvargs *nsd, const void *argp) 127 { 128 129 return copyin(argp, nsd, sizeof *nsd); 130 } 131 132 static int 133 nfssvc_nsd_out(void *argp, const struct nfsd_srvargs *nsd) 134 { 135 136 return copyout(nsd, argp, sizeof *nsd); 137 } 138 139 static int 140 nfssvc_exp_in(struct export_args *exp, const void *argp, size_t nexports) 141 { 142 143 return copyin(argp, exp, sizeof(*exp) * nexports); 144 } 145 146 /* 147 * NFS server system calls 148 */ 149 150 static struct nfssvc_copy_ops native_ops = { 151 .addsock_in = nfssvc_addsock_in, 152 .setexports_in = nfssvc_setexports_in, 153 .nsd_in = nfssvc_nsd_in, 154 .nsd_out = nfssvc_nsd_out, 155 .exp_in = nfssvc_exp_in, 156 }; 157 158 /* 159 * Nfs server pseudo system call for the nfsd's 160 * Based on the flag value it either: 161 * - adds a socket to the selection list 162 * - remains in the kernel as an nfsd 163 * - remains in the kernel as an nfsiod 164 */ 165 166 int 167 sys_nfssvc(struct lwp *l, const struct sys_nfssvc_args *uap, register_t *retval) 168 { 169 /* { 170 syscallarg(int) flag; 171 syscallarg(void *) argp; 172 } */ 173 int flag = SCARG(uap, flag); 174 void *argp = SCARG(uap, argp); 175 176 return do_nfssvc(&native_ops, l, flag, argp, retval); 177 } 178 179 int 180 do_nfssvc(struct nfssvc_copy_ops *ops, struct lwp *l, int flag, void *argp, register_t *retval) 181 { 182 int error; 183 file_t *fp; 184 struct mbuf *nam; 185 struct nfsd_args nfsdarg; 186 struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs; 187 struct nfsd *nfsd; 188 struct nfssvc_sock *slp; 189 struct nfsuid *nuidp; 190 191 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_NFS, 192 KAUTH_REQ_NETWORK_NFS_SVC, NULL, NULL, NULL); 193 if (error) 194 return (error); 195 196 mutex_enter(&nfsd_lock); 197 while (nfssvc_sockhead_flag & SLP_INIT) { 198 cv_wait(&nfsd_initcv, &nfsd_lock); 199 } 200 mutex_exit(&nfsd_lock); 201 202 if (flag & NFSSVC_BIOD) { 203 /* Dummy implementation of nfsios for 1.4 and earlier. */ 204 error = kpause("nfsbiod", true, 0, NULL); 205 } else if (flag & NFSSVC_MNTD) { 206 error = ENOSYS; 207 } else if (flag & NFSSVC_ADDSOCK) { 208 error = ops->addsock_in(&nfsdarg, argp); 209 if (error) 210 return (error); 211 /* getsock() will use the descriptor for us */ 212 if ((fp = fd_getfile(nfsdarg.sock)) == NULL) 213 return (EBADF); 214 if (fp->f_type != DTYPE_SOCKET) { 215 fd_putfile(nfsdarg.sock); 216 return (ENOTSOCK); 217 } 218 /* 219 * Get the client address for connected sockets. 220 */ 221 if (nfsdarg.name == NULL || nfsdarg.namelen == 0) 222 nam = (struct mbuf *)0; 223 else { 224 error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen, 225 MT_SONAME); 226 if (error) { 227 fd_putfile(nfsdarg.sock); 228 return (error); 229 } 230 } 231 error = nfssvc_addsock(fp, nam); 232 fd_putfile(nfsdarg.sock); 233 } else if (flag & NFSSVC_SETEXPORTSLIST) { 234 struct export_args *args; 235 struct mountd_exports_list mel; 236 237 error = ops->setexports_in(&mel, argp); 238 if (error != 0) 239 return error; 240 241 args = (struct export_args *)malloc(mel.mel_nexports * 242 sizeof(struct export_args), M_TEMP, M_WAITOK); 243 error = ops->exp_in(args, mel.mel_exports, mel.mel_nexports); 244 if (error != 0) { 245 free(args, M_TEMP); 246 return error; 247 } 248 mel.mel_exports = args; 249 250 error = mountd_set_exports_list(&mel, l, NULL); 251 252 free(args, M_TEMP); 253 } else { 254 error = ops->nsd_in(nsd, argp); 255 if (error) 256 return (error); 257 if ((flag & NFSSVC_AUTHIN) && 258 ((nfsd = nsd->nsd_nfsd)) != NULL && 259 (nfsd->nfsd_slp->ns_flags & SLP_VALID)) { 260 slp = nfsd->nfsd_slp; 261 262 /* 263 * First check to see if another nfsd has already 264 * added this credential. 265 */ 266 LIST_FOREACH(nuidp, NUIDHASH(slp, nsd->nsd_cr.cr_uid), 267 nu_hash) { 268 if (kauth_cred_geteuid(nuidp->nu_cr) == 269 nsd->nsd_cr.cr_uid && 270 (!nfsd->nfsd_nd->nd_nam2 || 271 netaddr_match(NU_NETFAM(nuidp), 272 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2))) 273 break; 274 } 275 if (nuidp) { 276 kauth_cred_hold(nuidp->nu_cr); 277 nfsd->nfsd_nd->nd_cr = nuidp->nu_cr; 278 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 279 } else { 280 /* 281 * Nope, so we will. 282 */ 283 if (slp->ns_numuids < nuidhash_max) { 284 slp->ns_numuids++; 285 nuidp = kmem_alloc(sizeof(*nuidp), KM_SLEEP); 286 } else 287 nuidp = (struct nfsuid *)0; 288 if ((slp->ns_flags & SLP_VALID) == 0) { 289 if (nuidp) 290 kmem_free(nuidp, sizeof(*nuidp)); 291 } else { 292 if (nuidp == (struct nfsuid *)0) { 293 nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); 294 LIST_REMOVE(nuidp, nu_hash); 295 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, 296 nu_lru); 297 if (nuidp->nu_flag & NU_NAM) 298 m_freem(nuidp->nu_nam); 299 } 300 nuidp->nu_flag = 0; 301 kauth_uucred_to_cred(nuidp->nu_cr, 302 &nsd->nsd_cr); 303 nuidp->nu_timestamp = nsd->nsd_timestamp; 304 nuidp->nu_expire = time_second + nsd->nsd_ttl; 305 /* 306 * and save the session key in nu_key. 307 */ 308 memcpy(nuidp->nu_key, nsd->nsd_key, 309 sizeof(nsd->nsd_key)); 310 if (nfsd->nfsd_nd->nd_nam2) { 311 struct sockaddr_in *saddr; 312 313 saddr = mtod(nfsd->nfsd_nd->nd_nam2, 314 struct sockaddr_in *); 315 switch (saddr->sin_family) { 316 case AF_INET: 317 nuidp->nu_flag |= NU_INETADDR; 318 nuidp->nu_inetaddr = 319 saddr->sin_addr.s_addr; 320 break; 321 case AF_INET6: 322 nuidp->nu_flag |= NU_NAM; 323 nuidp->nu_nam = m_copym( 324 nfsd->nfsd_nd->nd_nam2, 0, 325 M_COPYALL, M_WAIT); 326 break; 327 default: 328 return EAFNOSUPPORT; 329 }; 330 } 331 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp, 332 nu_lru); 333 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid), 334 nuidp, nu_hash); 335 kauth_cred_hold(nuidp->nu_cr); 336 nfsd->nfsd_nd->nd_cr = nuidp->nu_cr; 337 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 338 } 339 } 340 } 341 if ((flag & NFSSVC_AUTHINFAIL) && 342 (nfsd = nsd->nsd_nfsd)) 343 nfsd->nfsd_flag |= NFSD_AUTHFAIL; 344 error = nfssvc_nfsd(ops, nsd, argp, l); 345 } 346 if (error == EINTR || error == ERESTART) 347 error = 0; 348 return (error); 349 } 350 351 static struct nfssvc_sock * 352 nfsrv_sockalloc(void) 353 { 354 struct nfssvc_sock *slp; 355 356 slp = kmem_alloc(sizeof(*slp), KM_SLEEP); 357 memset(slp, 0, sizeof (struct nfssvc_sock)); 358 mutex_init(&slp->ns_lock, MUTEX_DRIVER, IPL_SOFTNET); 359 mutex_init(&slp->ns_alock, MUTEX_DRIVER, IPL_SOFTNET); 360 cv_init(&slp->ns_cv, "nfsdsock"); 361 TAILQ_INIT(&slp->ns_uidlruhead); 362 LIST_INIT(&slp->ns_tq); 363 SIMPLEQ_INIT(&slp->ns_sendq); 364 mutex_enter(&nfsd_lock); 365 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); 366 mutex_exit(&nfsd_lock); 367 368 return slp; 369 } 370 371 static void 372 nfsrv_sockfree(struct nfssvc_sock *slp) 373 { 374 375 KASSERT(slp->ns_so == NULL); 376 KASSERT(slp->ns_fp == NULL); 377 KASSERT((slp->ns_flags & SLP_VALID) == 0); 378 mutex_destroy(&slp->ns_lock); 379 mutex_destroy(&slp->ns_alock); 380 cv_destroy(&slp->ns_cv); 381 kmem_free(slp, sizeof(*slp)); 382 } 383 384 /* 385 * Adds a socket to the list for servicing by nfsds. 386 */ 387 int 388 nfssvc_addsock(file_t *fp, struct mbuf *mynam) 389 { 390 int siz; 391 struct nfssvc_sock *slp; 392 struct socket *so; 393 struct nfssvc_sock *tslp; 394 int error; 395 int val; 396 397 so = fp->f_socket; 398 tslp = (struct nfssvc_sock *)0; 399 /* 400 * Add it to the list, as required. 401 */ 402 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 403 if (so->so_proto->pr_domain->dom_family == AF_INET6) 404 tslp = nfs_udp6sock; 405 else { 406 tslp = nfs_udpsock; 407 if (tslp->ns_flags & SLP_VALID) { 408 m_freem(mynam); 409 return (EPERM); 410 } 411 } 412 } 413 if (so->so_type == SOCK_STREAM) 414 siz = NFS_MAXPACKET + sizeof (u_long); 415 else 416 siz = NFS_MAXPACKET; 417 solock(so); 418 error = soreserve(so, siz, siz); 419 sounlock(so); 420 if (error) { 421 m_freem(mynam); 422 return (error); 423 } 424 425 /* 426 * Set protocol specific options { for now TCP only } and 427 * reserve some space. For datagram sockets, this can get called 428 * repeatedly for the same socket, but that isn't harmful. 429 */ 430 if (so->so_type == SOCK_STREAM) { 431 val = 1; 432 so_setsockopt(NULL, so, SOL_SOCKET, SO_KEEPALIVE, &val, 433 sizeof(val)); 434 } 435 if ((so->so_proto->pr_domain->dom_family == AF_INET || 436 so->so_proto->pr_domain->dom_family == AF_INET6) && 437 so->so_proto->pr_protocol == IPPROTO_TCP) { 438 val = 1; 439 so_setsockopt(NULL, so, IPPROTO_TCP, TCP_NODELAY, &val, 440 sizeof(val)); 441 } 442 solock(so); 443 so->so_rcv.sb_flags &= ~SB_NOINTR; 444 so->so_rcv.sb_timeo = 0; 445 so->so_snd.sb_flags &= ~SB_NOINTR; 446 so->so_snd.sb_timeo = 0; 447 sounlock(so); 448 if (tslp) { 449 slp = tslp; 450 } else { 451 slp = nfsrv_sockalloc(); 452 } 453 slp->ns_so = so; 454 slp->ns_nam = mynam; 455 mutex_enter(&fp->f_lock); 456 fp->f_count++; 457 mutex_exit(&fp->f_lock); 458 slp->ns_fp = fp; 459 slp->ns_flags = SLP_VALID; 460 slp->ns_aflags = SLP_A_NEEDQ; 461 slp->ns_gflags = 0; 462 slp->ns_sflags = 0; 463 solock(so); 464 so->so_upcallarg = (void *)slp; 465 so->so_upcall = nfsrv_soupcall; 466 so->so_rcv.sb_flags |= SB_UPCALL; 467 sounlock(so); 468 nfsrv_wakenfsd(slp); 469 return (0); 470 } 471 472 /* 473 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 474 * until it is killed by a signal. 475 */ 476 static int 477 nfssvc_nfsd(struct nfssvc_copy_ops *ops, struct nfsd_srvargs *nsd, 478 void *argp, struct lwp *l) 479 { 480 struct timeval tv; 481 struct mbuf *m; 482 struct nfssvc_sock *slp; 483 struct nfsd *nfsd = nsd->nsd_nfsd; 484 struct nfsrv_descript *nd = NULL; 485 struct mbuf *mreq; 486 u_quad_t cur_usec; 487 int error = 0, cacherep, siz, sotype, writes_todo; 488 struct proc *p = l->l_proc; 489 bool doreinit; 490 491 #ifndef nolint 492 cacherep = RC_DOIT; 493 writes_todo = 0; 494 #endif 495 if (nfsd == NULL) { 496 nsd->nsd_nfsd = nfsd = kmem_alloc(sizeof(*nfsd), KM_SLEEP); 497 memset(nfsd, 0, sizeof (struct nfsd)); 498 cv_init(&nfsd->nfsd_cv, "nfsd"); 499 nfsd->nfsd_procp = p; 500 mutex_enter(&nfsd_lock); 501 while ((nfssvc_sockhead_flag & SLP_INIT) != 0) { 502 KASSERT(nfs_numnfsd == 0); 503 cv_wait(&nfsd_initcv, &nfsd_lock); 504 } 505 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); 506 nfs_numnfsd++; 507 mutex_exit(&nfsd_lock); 508 } 509 /* 510 * Loop getting rpc requests until SIGKILL. 511 */ 512 for (;;) { 513 bool dummy; 514 515 if ((curcpu()->ci_schedstate.spc_flags & SPCF_SHOULDYIELD) 516 != 0) { 517 preempt(); 518 } 519 if (nfsd->nfsd_slp == NULL) { 520 mutex_enter(&nfsd_lock); 521 while (nfsd->nfsd_slp == NULL && 522 (nfsd_head_flag & NFSD_CHECKSLP) == 0) { 523 SLIST_INSERT_HEAD(&nfsd_idle_head, nfsd, 524 nfsd_idle); 525 error = cv_wait_sig(&nfsd->nfsd_cv, &nfsd_lock); 526 if (error) { 527 slp = nfsd->nfsd_slp; 528 nfsd->nfsd_slp = NULL; 529 if (!slp) 530 SLIST_REMOVE(&nfsd_idle_head, 531 nfsd, nfsd, nfsd_idle); 532 mutex_exit(&nfsd_lock); 533 if (slp) { 534 nfsrv_wakenfsd(slp); 535 nfsrv_slpderef(slp); 536 } 537 goto done; 538 } 539 } 540 if (nfsd->nfsd_slp == NULL && 541 (nfsd_head_flag & NFSD_CHECKSLP) != 0) { 542 slp = TAILQ_FIRST(&nfssvc_sockpending); 543 if (slp) { 544 KASSERT((slp->ns_gflags & SLP_G_DOREC) 545 != 0); 546 TAILQ_REMOVE(&nfssvc_sockpending, slp, 547 ns_pending); 548 slp->ns_gflags &= ~SLP_G_DOREC; 549 slp->ns_sref++; 550 nfsd->nfsd_slp = slp; 551 } else 552 nfsd_head_flag &= ~NFSD_CHECKSLP; 553 } 554 KASSERT(nfsd->nfsd_slp == NULL || 555 nfsd->nfsd_slp->ns_sref > 0); 556 mutex_exit(&nfsd_lock); 557 if ((slp = nfsd->nfsd_slp) == NULL) 558 continue; 559 if (slp->ns_flags & SLP_VALID) { 560 bool more; 561 562 if (nfsdsock_testbits(slp, SLP_A_NEEDQ)) { 563 nfsrv_rcv(slp); 564 } 565 if (nfsdsock_testbits(slp, SLP_A_DISCONN)) { 566 nfsrv_zapsock(slp); 567 } 568 error = nfsrv_dorec(slp, nfsd, &nd, &more); 569 getmicrotime(&tv); 570 cur_usec = (u_quad_t)tv.tv_sec * 1000000 + 571 (u_quad_t)tv.tv_usec; 572 writes_todo = 0; 573 if (error) { 574 struct nfsrv_descript *nd2; 575 576 mutex_enter(&nfsd_lock); 577 nd2 = LIST_FIRST(&slp->ns_tq); 578 if (nd2 != NULL && 579 nd2->nd_time <= cur_usec) { 580 error = 0; 581 cacherep = RC_DOIT; 582 writes_todo = 1; 583 } 584 mutex_exit(&nfsd_lock); 585 } 586 if (error == 0 && more) { 587 nfsrv_wakenfsd(slp); 588 } 589 } 590 } else { 591 error = 0; 592 slp = nfsd->nfsd_slp; 593 } 594 KASSERT(slp != NULL); 595 KASSERT(nfsd->nfsd_slp == slp); 596 if (error || (slp->ns_flags & SLP_VALID) == 0) { 597 if (nd) { 598 nfsdreq_free(nd); 599 nd = NULL; 600 } 601 nfsd->nfsd_slp = NULL; 602 nfsrv_slpderef(slp); 603 continue; 604 } 605 sotype = slp->ns_so->so_type; 606 if (nd) { 607 getmicrotime(&nd->nd_starttime); 608 if (nd->nd_nam2) 609 nd->nd_nam = nd->nd_nam2; 610 else 611 nd->nd_nam = slp->ns_nam; 612 613 /* 614 * Check to see if authorization is needed. 615 */ 616 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { 617 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; 618 nsd->nsd_haddr = mtod(nd->nd_nam, 619 struct sockaddr_in *)->sin_addr.s_addr; 620 nsd->nsd_authlen = nfsd->nfsd_authlen; 621 nsd->nsd_verflen = nfsd->nfsd_verflen; 622 if (!copyout(nfsd->nfsd_authstr, 623 nsd->nsd_authstr, nfsd->nfsd_authlen) && 624 !copyout(nfsd->nfsd_verfstr, 625 nsd->nsd_verfstr, nfsd->nfsd_verflen) && 626 !ops->nsd_out(argp, nsd)) { 627 return (ENEEDAUTH); 628 } 629 cacherep = RC_DROPIT; 630 } else 631 cacherep = nfsrv_getcache(nd, slp, &mreq); 632 633 if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { 634 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; 635 nd->nd_procnum = NFSPROC_NOOP; 636 nd->nd_repstat = 637 (NFSERR_AUTHERR | AUTH_TOOWEAK); 638 cacherep = RC_DOIT; 639 } 640 } 641 642 /* 643 * Loop to get all the write rpc relies that have been 644 * gathered together. 645 */ 646 do { 647 switch (cacherep) { 648 case RC_DOIT: 649 mreq = NULL; 650 netexport_rdlock(); 651 if (writes_todo || nd == NULL || 652 (!(nd->nd_flag & ND_NFSV3) && 653 nd->nd_procnum == NFSPROC_WRITE && 654 nfsrvw_procrastinate > 0)) 655 error = nfsrv_writegather(&nd, slp, 656 l, &mreq); 657 else 658 error = 659 (*(nfsrv3_procs[nd->nd_procnum])) 660 (nd, slp, l, &mreq); 661 netexport_rdunlock(); 662 if (mreq == NULL) { 663 if (nd != NULL) { 664 if (nd->nd_nam2) 665 m_free(nd->nd_nam2); 666 } 667 break; 668 } 669 if (error) { 670 nfsstats.srv_errs++; 671 if (nd) { 672 nfsrv_updatecache(nd, false, 673 mreq); 674 if (nd->nd_nam2) 675 m_freem(nd->nd_nam2); 676 } 677 break; 678 } 679 if (nd) { 680 nfsstats.srvrpccnt[nd->nd_procnum]++; 681 nfsrv_updatecache(nd, true, mreq); 682 nd->nd_mrep = NULL; 683 } 684 case RC_REPLY: 685 m = mreq; 686 siz = 0; 687 while (m) { 688 siz += m->m_len; 689 m = m->m_next; 690 } 691 if (siz <= 0 || siz > NFS_MAXPACKET) { 692 printf("mbuf siz=%d\n",siz); 693 panic("Bad nfs svc reply"); 694 } 695 m = mreq; 696 m->m_pkthdr.len = siz; 697 m->m_pkthdr.rcvif = (struct ifnet *)0; 698 /* 699 * For stream protocols, prepend a Sun RPC 700 * Record Mark. 701 */ 702 if (sotype == SOCK_STREAM) { 703 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 704 *mtod(m, u_int32_t *) = 705 htonl(0x80000000 | siz); 706 } 707 if (nd) { 708 nd->nd_mreq = m; 709 if (nfsrtton) { 710 nfsd_rt(slp->ns_so->so_type, nd, 711 cacherep); 712 } 713 error = nfsdsock_sendreply(slp, nd); 714 nd = NULL; 715 } 716 if (error == EPIPE) 717 nfsrv_zapsock(slp); 718 if (error == EINTR || error == ERESTART) { 719 nfsd->nfsd_slp = NULL; 720 nfsrv_slpderef(slp); 721 goto done; 722 } 723 break; 724 case RC_DROPIT: 725 if (nd) { 726 if (nfsrtton) 727 nfsd_rt(sotype, nd, cacherep); 728 m_freem(nd->nd_mrep); 729 m_freem(nd->nd_nam2); 730 } 731 break; 732 } 733 if (nd) { 734 nfsdreq_free(nd); 735 nd = NULL; 736 } 737 738 /* 739 * Check to see if there are outstanding writes that 740 * need to be serviced. 741 */ 742 getmicrotime(&tv); 743 cur_usec = (u_quad_t)tv.tv_sec * 1000000 + 744 (u_quad_t)tv.tv_usec; 745 mutex_enter(&nfsd_lock); 746 if (LIST_FIRST(&slp->ns_tq) && 747 LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) { 748 cacherep = RC_DOIT; 749 writes_todo = 1; 750 } else 751 writes_todo = 0; 752 mutex_exit(&nfsd_lock); 753 } while (writes_todo); 754 if (nfsrv_dorec(slp, nfsd, &nd, &dummy)) { 755 nfsd->nfsd_slp = NULL; 756 nfsrv_slpderef(slp); 757 } 758 } 759 done: 760 mutex_enter(&nfsd_lock); 761 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); 762 doreinit = --nfs_numnfsd == 0; 763 if (doreinit) 764 nfssvc_sockhead_flag |= SLP_INIT; 765 mutex_exit(&nfsd_lock); 766 cv_destroy(&nfsd->nfsd_cv); 767 kmem_free(nfsd, sizeof(*nfsd)); 768 nsd->nsd_nfsd = NULL; 769 if (doreinit) 770 nfsrv_init(true); /* Reinitialize everything */ 771 return (error); 772 } 773 774 /* 775 * Shut down a socket associated with an nfssvc_sock structure. 776 * Should be called with the send lock set, if required. 777 * The trick here is to increment the sref at the start, so that the nfsds 778 * will stop using it and clear ns_flag at the end so that it will not be 779 * reassigned during cleanup. 780 * 781 * called at splsoftnet. 782 */ 783 void 784 nfsrv_zapsock(struct nfssvc_sock *slp) 785 { 786 struct nfsuid *nuidp, *nnuidp; 787 struct nfsrv_descript *nwp; 788 struct socket *so; 789 struct mbuf *m; 790 791 if (nfsdsock_drain(slp)) { 792 return; 793 } 794 mutex_enter(&nfsd_lock); 795 if (slp->ns_gflags & SLP_G_DOREC) { 796 TAILQ_REMOVE(&nfssvc_sockpending, slp, ns_pending); 797 slp->ns_gflags &= ~SLP_G_DOREC; 798 } 799 mutex_exit(&nfsd_lock); 800 801 so = slp->ns_so; 802 KASSERT(so != NULL); 803 solock(so); 804 so->so_upcall = NULL; 805 so->so_upcallarg = NULL; 806 so->so_rcv.sb_flags &= ~SB_UPCALL; 807 soshutdown(so, SHUT_RDWR); 808 sounlock(so); 809 810 m_freem(slp->ns_raw); 811 m = slp->ns_rec; 812 while (m != NULL) { 813 struct mbuf *n; 814 815 n = m->m_nextpkt; 816 m_freem(m); 817 m = n; 818 } 819 /* XXX what about freeing ns_frag ? */ 820 for (nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); nuidp != 0; 821 nuidp = nnuidp) { 822 nnuidp = TAILQ_NEXT(nuidp, nu_lru); 823 LIST_REMOVE(nuidp, nu_hash); 824 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); 825 if (nuidp->nu_flag & NU_NAM) 826 m_freem(nuidp->nu_nam); 827 kmem_free(nuidp, sizeof(*nuidp)); 828 } 829 mutex_enter(&nfsd_lock); 830 while ((nwp = LIST_FIRST(&slp->ns_tq)) != NULL) { 831 LIST_REMOVE(nwp, nd_tq); 832 mutex_exit(&nfsd_lock); 833 nfsdreq_free(nwp); 834 mutex_enter(&nfsd_lock); 835 } 836 mutex_exit(&nfsd_lock); 837 } 838 839 /* 840 * Derefence a server socket structure. If it has no more references and 841 * is no longer valid, you can throw it away. 842 */ 843 void 844 nfsrv_slpderef(struct nfssvc_sock *slp) 845 { 846 uint32_t ref; 847 848 mutex_enter(&nfsd_lock); 849 KASSERT(slp->ns_sref > 0); 850 ref = --slp->ns_sref; 851 if (ref == 0 && (slp->ns_flags & SLP_VALID) == 0) { 852 file_t *fp; 853 854 KASSERT((slp->ns_gflags & SLP_G_DOREC) == 0); 855 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 856 mutex_exit(&nfsd_lock); 857 858 fp = slp->ns_fp; 859 if (fp != NULL) { 860 slp->ns_fp = NULL; 861 KASSERT(fp != NULL); 862 KASSERT(fp->f_socket == slp->ns_so); 863 KASSERT(fp->f_count > 0); 864 closef(fp); 865 slp->ns_so = NULL; 866 } 867 868 if (slp->ns_nam) 869 m_free(slp->ns_nam); 870 nfsrv_sockfree(slp); 871 } else 872 mutex_exit(&nfsd_lock); 873 } 874 875 /* 876 * Initialize the data structures for the server. 877 * Handshake with any new nfsds starting up to avoid any chance of 878 * corruption. 879 */ 880 void 881 nfsrv_init(int terminating) 882 { 883 struct nfssvc_sock *slp; 884 885 if (!terminating) { 886 mutex_init(&nfsd_lock, MUTEX_DRIVER, IPL_SOFTNET); 887 cv_init(&nfsd_initcv, "nfsdinit"); 888 } 889 890 mutex_enter(&nfsd_lock); 891 if (!terminating && (nfssvc_sockhead_flag & SLP_INIT) != 0) 892 panic("nfsd init"); 893 nfssvc_sockhead_flag |= SLP_INIT; 894 895 if (terminating) { 896 KASSERT(SLIST_EMPTY(&nfsd_idle_head)); 897 KASSERT(TAILQ_EMPTY(&nfsd_head)); 898 while ((slp = TAILQ_FIRST(&nfssvc_sockhead)) != NULL) { 899 mutex_exit(&nfsd_lock); 900 KASSERT(slp->ns_sref == 0); 901 slp->ns_sref++; 902 nfsrv_zapsock(slp); 903 nfsrv_slpderef(slp); 904 mutex_enter(&nfsd_lock); 905 } 906 KASSERT(TAILQ_EMPTY(&nfssvc_sockpending)); 907 mutex_exit(&nfsd_lock); 908 nfsrv_cleancache(); /* And clear out server cache */ 909 } else { 910 mutex_exit(&nfsd_lock); 911 nfs_pub.np_valid = 0; 912 } 913 914 TAILQ_INIT(&nfssvc_sockhead); 915 TAILQ_INIT(&nfssvc_sockpending); 916 917 TAILQ_INIT(&nfsd_head); 918 SLIST_INIT(&nfsd_idle_head); 919 nfsd_head_flag &= ~NFSD_CHECKSLP; 920 921 nfs_udpsock = nfsrv_sockalloc(); 922 nfs_udp6sock = nfsrv_sockalloc(); 923 924 mutex_enter(&nfsd_lock); 925 nfssvc_sockhead_flag &= ~SLP_INIT; 926 cv_broadcast(&nfsd_initcv); 927 mutex_exit(&nfsd_lock); 928 } 929 930 void 931 nfsrv_fini(void) 932 { 933 934 nfsrv_init(true); 935 cv_destroy(&nfsd_initcv); 936 mutex_destroy(&nfsd_lock); 937 } 938 939 /* 940 * Add entries to the server monitor log. 941 */ 942 static void 943 nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep) 944 { 945 struct timeval tv; 946 struct drt *rt; 947 948 rt = &nfsdrt.drt[nfsdrt.pos]; 949 if (cacherep == RC_DOIT) 950 rt->flag = 0; 951 else if (cacherep == RC_REPLY) 952 rt->flag = DRT_CACHEREPLY; 953 else 954 rt->flag = DRT_CACHEDROP; 955 if (sotype == SOCK_STREAM) 956 rt->flag |= DRT_TCP; 957 if (nd->nd_flag & ND_NFSV3) 958 rt->flag |= DRT_NFSV3; 959 rt->proc = nd->nd_procnum; 960 if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET) 961 rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr; 962 else 963 rt->ipadr = INADDR_ANY; 964 getmicrotime(&tv); 965 rt->resptime = ((tv.tv_sec - nd->nd_starttime.tv_sec) * 1000000) + 966 (tv.tv_usec - nd->nd_starttime.tv_usec); 967 rt->tstamp = tv; 968 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 969 } 970