nfs_syscalls.c revision 1.153.22.2
1 /* $NetBSD: nfs_syscalls.c,v 1.153.22.2 2017/12/03 11:39:06 jdolecek 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 1.153.22.2 2017/12/03 11:39:06 jdolecek 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 kmem_free(nuidp, sizeof(*nuidp)); 329 return EAFNOSUPPORT; 330 }; 331 } 332 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp, 333 nu_lru); 334 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid), 335 nuidp, nu_hash); 336 kauth_cred_hold(nuidp->nu_cr); 337 nfsd->nfsd_nd->nd_cr = nuidp->nu_cr; 338 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 339 } 340 } 341 } 342 if ((flag & NFSSVC_AUTHINFAIL) && 343 (nfsd = nsd->nsd_nfsd)) 344 nfsd->nfsd_flag |= NFSD_AUTHFAIL; 345 error = nfssvc_nfsd(ops, nsd, argp, l); 346 } 347 if (error == EINTR || error == ERESTART) 348 error = 0; 349 return (error); 350 } 351 352 static struct nfssvc_sock * 353 nfsrv_sockalloc(void) 354 { 355 struct nfssvc_sock *slp; 356 357 slp = kmem_alloc(sizeof(*slp), KM_SLEEP); 358 memset(slp, 0, sizeof (struct nfssvc_sock)); 359 mutex_init(&slp->ns_lock, MUTEX_DRIVER, IPL_SOFTNET); 360 mutex_init(&slp->ns_alock, MUTEX_DRIVER, IPL_SOFTNET); 361 cv_init(&slp->ns_cv, "nfsdsock"); 362 TAILQ_INIT(&slp->ns_uidlruhead); 363 LIST_INIT(&slp->ns_tq); 364 SIMPLEQ_INIT(&slp->ns_sendq); 365 mutex_enter(&nfsd_lock); 366 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); 367 mutex_exit(&nfsd_lock); 368 369 return slp; 370 } 371 372 static void 373 nfsrv_sockfree(struct nfssvc_sock *slp) 374 { 375 376 KASSERT(slp->ns_so == NULL); 377 KASSERT(slp->ns_fp == NULL); 378 KASSERT((slp->ns_flags & SLP_VALID) == 0); 379 mutex_destroy(&slp->ns_lock); 380 mutex_destroy(&slp->ns_alock); 381 cv_destroy(&slp->ns_cv); 382 kmem_free(slp, sizeof(*slp)); 383 } 384 385 /* 386 * Adds a socket to the list for servicing by nfsds. 387 */ 388 int 389 nfssvc_addsock(file_t *fp, struct mbuf *mynam) 390 { 391 int siz; 392 struct nfssvc_sock *slp; 393 struct socket *so; 394 struct nfssvc_sock *tslp; 395 int error; 396 int val; 397 398 so = fp->f_socket; 399 tslp = (struct nfssvc_sock *)0; 400 /* 401 * Add it to the list, as required. 402 */ 403 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 404 if (so->so_proto->pr_domain->dom_family == AF_INET6) 405 tslp = nfs_udp6sock; 406 else { 407 tslp = nfs_udpsock; 408 if (tslp->ns_flags & SLP_VALID) { 409 m_freem(mynam); 410 return (EPERM); 411 } 412 } 413 } 414 if (so->so_type == SOCK_STREAM) 415 siz = NFS_MAXPACKET + sizeof (u_long); 416 else 417 siz = NFS_MAXPACKET; 418 solock(so); 419 error = soreserve(so, siz, siz); 420 sounlock(so); 421 if (error) { 422 m_freem(mynam); 423 return (error); 424 } 425 426 /* 427 * Set protocol specific options { for now TCP only } and 428 * reserve some space. For datagram sockets, this can get called 429 * repeatedly for the same socket, but that isn't harmful. 430 */ 431 if (so->so_type == SOCK_STREAM) { 432 val = 1; 433 so_setsockopt(NULL, so, SOL_SOCKET, SO_KEEPALIVE, &val, 434 sizeof(val)); 435 } 436 if ((so->so_proto->pr_domain->dom_family == AF_INET || 437 so->so_proto->pr_domain->dom_family == AF_INET6) && 438 so->so_proto->pr_protocol == IPPROTO_TCP) { 439 val = 1; 440 so_setsockopt(NULL, so, IPPROTO_TCP, TCP_NODELAY, &val, 441 sizeof(val)); 442 } 443 solock(so); 444 so->so_rcv.sb_flags &= ~SB_NOINTR; 445 so->so_rcv.sb_timeo = 0; 446 so->so_snd.sb_flags &= ~SB_NOINTR; 447 so->so_snd.sb_timeo = 0; 448 sounlock(so); 449 if (tslp) { 450 slp = tslp; 451 } else { 452 slp = nfsrv_sockalloc(); 453 } 454 slp->ns_so = so; 455 slp->ns_nam = mynam; 456 mutex_enter(&fp->f_lock); 457 fp->f_count++; 458 mutex_exit(&fp->f_lock); 459 slp->ns_fp = fp; 460 slp->ns_flags = SLP_VALID; 461 slp->ns_aflags = SLP_A_NEEDQ; 462 slp->ns_gflags = 0; 463 slp->ns_sflags = 0; 464 solock(so); 465 so->so_upcallarg = (void *)slp; 466 so->so_upcall = nfsrv_soupcall; 467 so->so_rcv.sb_flags |= SB_UPCALL; 468 sounlock(so); 469 nfsrv_wakenfsd(slp); 470 return (0); 471 } 472 473 /* 474 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 475 * until it is killed by a signal. 476 */ 477 static int 478 nfssvc_nfsd(struct nfssvc_copy_ops *ops, struct nfsd_srvargs *nsd, 479 void *argp, struct lwp *l) 480 { 481 struct timeval tv; 482 struct mbuf *m; 483 struct nfssvc_sock *slp; 484 struct nfsd *nfsd = nsd->nsd_nfsd; 485 struct nfsrv_descript *nd = NULL; 486 struct mbuf *mreq; 487 u_quad_t cur_usec; 488 int error = 0, cacherep, siz, sotype, writes_todo; 489 struct proc *p = l->l_proc; 490 bool doreinit; 491 492 #ifndef nolint 493 cacherep = RC_DOIT; 494 writes_todo = 0; 495 #endif 496 if (nfsd == NULL) { 497 nsd->nsd_nfsd = nfsd = kmem_alloc(sizeof(*nfsd), KM_SLEEP); 498 memset(nfsd, 0, sizeof (struct nfsd)); 499 cv_init(&nfsd->nfsd_cv, "nfsd"); 500 nfsd->nfsd_procp = p; 501 mutex_enter(&nfsd_lock); 502 while ((nfssvc_sockhead_flag & SLP_INIT) != 0) { 503 KASSERT(nfs_numnfsd == 0); 504 cv_wait(&nfsd_initcv, &nfsd_lock); 505 } 506 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); 507 nfs_numnfsd++; 508 mutex_exit(&nfsd_lock); 509 } 510 /* 511 * Loop getting rpc requests until SIGKILL. 512 */ 513 for (;;) { 514 bool dummy; 515 516 if ((curcpu()->ci_schedstate.spc_flags & SPCF_SHOULDYIELD) 517 != 0) { 518 preempt(); 519 } 520 if (nfsd->nfsd_slp == NULL) { 521 mutex_enter(&nfsd_lock); 522 while (nfsd->nfsd_slp == NULL && 523 (nfsd_head_flag & NFSD_CHECKSLP) == 0) { 524 SLIST_INSERT_HEAD(&nfsd_idle_head, nfsd, 525 nfsd_idle); 526 error = cv_wait_sig(&nfsd->nfsd_cv, &nfsd_lock); 527 if (error) { 528 slp = nfsd->nfsd_slp; 529 nfsd->nfsd_slp = NULL; 530 if (!slp) 531 SLIST_REMOVE(&nfsd_idle_head, 532 nfsd, nfsd, nfsd_idle); 533 mutex_exit(&nfsd_lock); 534 if (slp) { 535 nfsrv_wakenfsd(slp); 536 nfsrv_slpderef(slp); 537 } 538 goto done; 539 } 540 } 541 if (nfsd->nfsd_slp == NULL && 542 (nfsd_head_flag & NFSD_CHECKSLP) != 0) { 543 slp = TAILQ_FIRST(&nfssvc_sockpending); 544 if (slp) { 545 KASSERT((slp->ns_gflags & SLP_G_DOREC) 546 != 0); 547 TAILQ_REMOVE(&nfssvc_sockpending, slp, 548 ns_pending); 549 slp->ns_gflags &= ~SLP_G_DOREC; 550 slp->ns_sref++; 551 nfsd->nfsd_slp = slp; 552 } else 553 nfsd_head_flag &= ~NFSD_CHECKSLP; 554 } 555 KASSERT(nfsd->nfsd_slp == NULL || 556 nfsd->nfsd_slp->ns_sref > 0); 557 mutex_exit(&nfsd_lock); 558 if ((slp = nfsd->nfsd_slp) == NULL) 559 continue; 560 if (slp->ns_flags & SLP_VALID) { 561 bool more; 562 563 if (nfsdsock_testbits(slp, SLP_A_NEEDQ)) { 564 nfsrv_rcv(slp); 565 } 566 if (nfsdsock_testbits(slp, SLP_A_DISCONN)) { 567 nfsrv_zapsock(slp); 568 } 569 error = nfsrv_dorec(slp, nfsd, &nd, &more); 570 getmicrotime(&tv); 571 cur_usec = (u_quad_t)tv.tv_sec * 1000000 + 572 (u_quad_t)tv.tv_usec; 573 writes_todo = 0; 574 if (error) { 575 struct nfsrv_descript *nd2; 576 577 mutex_enter(&nfsd_lock); 578 nd2 = LIST_FIRST(&slp->ns_tq); 579 if (nd2 != NULL && 580 nd2->nd_time <= cur_usec) { 581 error = 0; 582 cacherep = RC_DOIT; 583 writes_todo = 1; 584 } 585 mutex_exit(&nfsd_lock); 586 } 587 if (error == 0 && more) { 588 nfsrv_wakenfsd(slp); 589 } 590 } 591 } else { 592 error = 0; 593 slp = nfsd->nfsd_slp; 594 } 595 KASSERT(slp != NULL); 596 KASSERT(nfsd->nfsd_slp == slp); 597 if (error || (slp->ns_flags & SLP_VALID) == 0) { 598 if (nd) { 599 nfsdreq_free(nd); 600 nd = NULL; 601 } 602 nfsd->nfsd_slp = NULL; 603 nfsrv_slpderef(slp); 604 continue; 605 } 606 sotype = slp->ns_so->so_type; 607 if (nd) { 608 getmicrotime(&nd->nd_starttime); 609 if (nd->nd_nam2) 610 nd->nd_nam = nd->nd_nam2; 611 else 612 nd->nd_nam = slp->ns_nam; 613 614 /* 615 * Check to see if authorization is needed. 616 */ 617 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { 618 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; 619 nsd->nsd_haddr = mtod(nd->nd_nam, 620 struct sockaddr_in *)->sin_addr.s_addr; 621 nsd->nsd_authlen = nfsd->nfsd_authlen; 622 nsd->nsd_verflen = nfsd->nfsd_verflen; 623 if (!copyout(nfsd->nfsd_authstr, 624 nsd->nsd_authstr, nfsd->nfsd_authlen) && 625 !copyout(nfsd->nfsd_verfstr, 626 nsd->nsd_verfstr, nfsd->nfsd_verflen) && 627 !ops->nsd_out(argp, nsd)) { 628 return (ENEEDAUTH); 629 } 630 cacherep = RC_DROPIT; 631 } else 632 cacherep = nfsrv_getcache(nd, slp, &mreq); 633 634 if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { 635 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; 636 nd->nd_procnum = NFSPROC_NOOP; 637 nd->nd_repstat = 638 (NFSERR_AUTHERR | AUTH_TOOWEAK); 639 cacherep = RC_DOIT; 640 } 641 } 642 643 /* 644 * Loop to get all the write rpc relies that have been 645 * gathered together. 646 */ 647 do { 648 switch (cacherep) { 649 case RC_DOIT: 650 mreq = NULL; 651 netexport_rdlock(); 652 if (writes_todo || nd == NULL || 653 (!(nd->nd_flag & ND_NFSV3) && 654 nd->nd_procnum == NFSPROC_WRITE && 655 nfsrvw_procrastinate > 0)) 656 error = nfsrv_writegather(&nd, slp, 657 l, &mreq); 658 else 659 error = 660 (*(nfsrv3_procs[nd->nd_procnum])) 661 (nd, slp, l, &mreq); 662 netexport_rdunlock(); 663 if (mreq == NULL) { 664 if (nd != NULL) { 665 if (nd->nd_nam2) 666 m_free(nd->nd_nam2); 667 } 668 break; 669 } 670 if (error) { 671 nfsstats.srv_errs++; 672 if (nd) { 673 nfsrv_updatecache(nd, false, 674 mreq); 675 if (nd->nd_nam2) 676 m_freem(nd->nd_nam2); 677 } 678 break; 679 } 680 if (nd) { 681 nfsstats.srvrpccnt[nd->nd_procnum]++; 682 nfsrv_updatecache(nd, true, mreq); 683 nd->nd_mrep = NULL; 684 } 685 case RC_REPLY: 686 m = mreq; 687 siz = 0; 688 while (m) { 689 siz += m->m_len; 690 m = m->m_next; 691 } 692 if (siz <= 0 || siz > NFS_MAXPACKET) { 693 printf("mbuf siz=%d\n",siz); 694 panic("Bad nfs svc reply"); 695 } 696 m = mreq; 697 m->m_pkthdr.len = siz; 698 m_reset_rcvif(m); 699 /* 700 * For stream protocols, prepend a Sun RPC 701 * Record Mark. 702 */ 703 if (sotype == SOCK_STREAM) { 704 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 705 *mtod(m, u_int32_t *) = 706 htonl(0x80000000 | siz); 707 } 708 if (nd) { 709 nd->nd_mreq = m; 710 if (nfsrtton) { 711 nfsd_rt(slp->ns_so->so_type, nd, 712 cacherep); 713 } 714 error = nfsdsock_sendreply(slp, nd); 715 nd = NULL; 716 } 717 if (error == EPIPE) 718 nfsrv_zapsock(slp); 719 if (error == EINTR || error == ERESTART) { 720 nfsd->nfsd_slp = NULL; 721 nfsrv_slpderef(slp); 722 goto done; 723 } 724 break; 725 case RC_DROPIT: 726 if (nd) { 727 if (nfsrtton) 728 nfsd_rt(sotype, nd, cacherep); 729 m_freem(nd->nd_mrep); 730 m_freem(nd->nd_nam2); 731 } 732 break; 733 } 734 if (nd) { 735 nfsdreq_free(nd); 736 nd = NULL; 737 } 738 739 /* 740 * Check to see if there are outstanding writes that 741 * need to be serviced. 742 */ 743 getmicrotime(&tv); 744 cur_usec = (u_quad_t)tv.tv_sec * 1000000 + 745 (u_quad_t)tv.tv_usec; 746 mutex_enter(&nfsd_lock); 747 if (LIST_FIRST(&slp->ns_tq) && 748 LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) { 749 cacherep = RC_DOIT; 750 writes_todo = 1; 751 } else 752 writes_todo = 0; 753 mutex_exit(&nfsd_lock); 754 } while (writes_todo); 755 if (nfsrv_dorec(slp, nfsd, &nd, &dummy)) { 756 nfsd->nfsd_slp = NULL; 757 nfsrv_slpderef(slp); 758 } 759 } 760 done: 761 mutex_enter(&nfsd_lock); 762 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); 763 doreinit = --nfs_numnfsd == 0; 764 if (doreinit) 765 nfssvc_sockhead_flag |= SLP_INIT; 766 mutex_exit(&nfsd_lock); 767 cv_destroy(&nfsd->nfsd_cv); 768 kmem_free(nfsd, sizeof(*nfsd)); 769 nsd->nsd_nfsd = NULL; 770 if (doreinit) 771 nfsrv_init(true); /* Reinitialize everything */ 772 return (error); 773 } 774 775 /* 776 * Shut down a socket associated with an nfssvc_sock structure. 777 * Should be called with the send lock set, if required. 778 * The trick here is to increment the sref at the start, so that the nfsds 779 * will stop using it and clear ns_flag at the end so that it will not be 780 * reassigned during cleanup. 781 * 782 * called at splsoftnet. 783 */ 784 void 785 nfsrv_zapsock(struct nfssvc_sock *slp) 786 { 787 struct nfsuid *nuidp, *nnuidp; 788 struct nfsrv_descript *nwp; 789 struct socket *so; 790 struct mbuf *m; 791 792 if (nfsdsock_drain(slp)) { 793 return; 794 } 795 mutex_enter(&nfsd_lock); 796 if (slp->ns_gflags & SLP_G_DOREC) { 797 TAILQ_REMOVE(&nfssvc_sockpending, slp, ns_pending); 798 slp->ns_gflags &= ~SLP_G_DOREC; 799 } 800 mutex_exit(&nfsd_lock); 801 802 so = slp->ns_so; 803 KASSERT(so != NULL); 804 solock(so); 805 so->so_upcall = NULL; 806 so->so_upcallarg = NULL; 807 so->so_rcv.sb_flags &= ~SB_UPCALL; 808 soshutdown(so, SHUT_RDWR); 809 sounlock(so); 810 811 m_freem(slp->ns_raw); 812 m = slp->ns_rec; 813 while (m != NULL) { 814 struct mbuf *n; 815 816 n = m->m_nextpkt; 817 m_freem(m); 818 m = n; 819 } 820 /* XXX what about freeing ns_frag ? */ 821 for (nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); nuidp != 0; 822 nuidp = nnuidp) { 823 nnuidp = TAILQ_NEXT(nuidp, nu_lru); 824 LIST_REMOVE(nuidp, nu_hash); 825 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); 826 if (nuidp->nu_flag & NU_NAM) 827 m_freem(nuidp->nu_nam); 828 kmem_free(nuidp, sizeof(*nuidp)); 829 } 830 mutex_enter(&nfsd_lock); 831 while ((nwp = LIST_FIRST(&slp->ns_tq)) != NULL) { 832 LIST_REMOVE(nwp, nd_tq); 833 mutex_exit(&nfsd_lock); 834 nfsdreq_free(nwp); 835 mutex_enter(&nfsd_lock); 836 } 837 mutex_exit(&nfsd_lock); 838 } 839 840 /* 841 * Derefence a server socket structure. If it has no more references and 842 * is no longer valid, you can throw it away. 843 */ 844 void 845 nfsrv_slpderef(struct nfssvc_sock *slp) 846 { 847 uint32_t ref; 848 849 mutex_enter(&nfsd_lock); 850 KASSERT(slp->ns_sref > 0); 851 ref = --slp->ns_sref; 852 if (ref == 0 && (slp->ns_flags & SLP_VALID) == 0) { 853 file_t *fp; 854 855 KASSERT((slp->ns_gflags & SLP_G_DOREC) == 0); 856 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 857 mutex_exit(&nfsd_lock); 858 859 fp = slp->ns_fp; 860 if (fp != NULL) { 861 slp->ns_fp = NULL; 862 KASSERT(fp != NULL); 863 KASSERT(fp->f_socket == slp->ns_so); 864 KASSERT(fp->f_count > 0); 865 closef(fp); 866 slp->ns_so = NULL; 867 } 868 869 if (slp->ns_nam) 870 m_free(slp->ns_nam); 871 nfsrv_sockfree(slp); 872 } else 873 mutex_exit(&nfsd_lock); 874 } 875 876 /* 877 * Initialize the data structures for the server. 878 * Handshake with any new nfsds starting up to avoid any chance of 879 * corruption. 880 */ 881 void 882 nfsrv_init(int terminating) 883 { 884 struct nfssvc_sock *slp; 885 886 if (!terminating) { 887 mutex_init(&nfsd_lock, MUTEX_DRIVER, IPL_SOFTNET); 888 cv_init(&nfsd_initcv, "nfsdinit"); 889 } 890 891 mutex_enter(&nfsd_lock); 892 if (!terminating && (nfssvc_sockhead_flag & SLP_INIT) != 0) 893 panic("nfsd init"); 894 nfssvc_sockhead_flag |= SLP_INIT; 895 896 if (terminating) { 897 KASSERT(SLIST_EMPTY(&nfsd_idle_head)); 898 KASSERT(TAILQ_EMPTY(&nfsd_head)); 899 while ((slp = TAILQ_FIRST(&nfssvc_sockhead)) != NULL) { 900 mutex_exit(&nfsd_lock); 901 KASSERT(slp->ns_sref == 0); 902 slp->ns_sref++; 903 nfsrv_zapsock(slp); 904 nfsrv_slpderef(slp); 905 mutex_enter(&nfsd_lock); 906 } 907 KASSERT(TAILQ_EMPTY(&nfssvc_sockpending)); 908 mutex_exit(&nfsd_lock); 909 nfsrv_cleancache(); /* And clear out server cache */ 910 } else { 911 mutex_exit(&nfsd_lock); 912 nfs_pub.np_valid = 0; 913 } 914 915 TAILQ_INIT(&nfssvc_sockhead); 916 TAILQ_INIT(&nfssvc_sockpending); 917 918 TAILQ_INIT(&nfsd_head); 919 SLIST_INIT(&nfsd_idle_head); 920 nfsd_head_flag &= ~NFSD_CHECKSLP; 921 922 nfs_udpsock = nfsrv_sockalloc(); 923 nfs_udp6sock = nfsrv_sockalloc(); 924 925 mutex_enter(&nfsd_lock); 926 nfssvc_sockhead_flag &= ~SLP_INIT; 927 cv_broadcast(&nfsd_initcv); 928 mutex_exit(&nfsd_lock); 929 } 930 931 void 932 nfsrv_fini(void) 933 { 934 935 nfsrv_init(true); 936 cv_destroy(&nfsd_initcv); 937 mutex_destroy(&nfsd_lock); 938 } 939 940 /* 941 * Add entries to the server monitor log. 942 */ 943 static void 944 nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep) 945 { 946 struct timeval tv; 947 struct drt *rt; 948 949 rt = &nfsdrt.drt[nfsdrt.pos]; 950 if (cacherep == RC_DOIT) 951 rt->flag = 0; 952 else if (cacherep == RC_REPLY) 953 rt->flag = DRT_CACHEREPLY; 954 else 955 rt->flag = DRT_CACHEDROP; 956 if (sotype == SOCK_STREAM) 957 rt->flag |= DRT_TCP; 958 if (nd->nd_flag & ND_NFSV3) 959 rt->flag |= DRT_NFSV3; 960 rt->proc = nd->nd_procnum; 961 if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET) 962 rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr; 963 else 964 rt->ipadr = INADDR_ANY; 965 getmicrotime(&tv); 966 rt->resptime = ((tv.tv_sec - nd->nd_starttime.tv_sec) * 1000000) + 967 (tv.tv_usec - nd->nd_starttime.tv_usec); 968 rt->tstamp = tv; 969 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 970 } 971
Indexes created Tue Oct 21 05:10:09 GMT 2025