nfs_syscalls.c revision 1.30
1 /* $NetBSD: nfs_syscalls.c,v 1.30 1998/06/25 22:18:10 thorpej 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_syscalls.c 8.5 (Berkeley) 3/30/95 39 */ 40 41 #include "fs_nfs.h" 42 #include "opt_nfsserver.h" 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/file.h> 48 #include <sys/stat.h> 49 #include <sys/vnode.h> 50 #include <sys/mount.h> 51 #include <sys/proc.h> 52 #include <sys/uio.h> 53 #include <sys/malloc.h> 54 #include <sys/buf.h> 55 #include <sys/mbuf.h> 56 #include <sys/socket.h> 57 #include <sys/socketvar.h> 58 #include <sys/domain.h> 59 #include <sys/protosw.h> 60 #include <sys/namei.h> 61 #include <sys/syslog.h> 62 #include <sys/filedesc.h> 63 64 #include <sys/syscallargs.h> 65 66 #include <netinet/in.h> 67 #include <netinet/tcp.h> 68 #ifdef ISO 69 #include <netiso/iso.h> 70 #endif 71 #include <nfs/xdr_subs.h> 72 #include <nfs/rpcv2.h> 73 #include <nfs/nfsproto.h> 74 #include <nfs/nfs.h> 75 #include <nfs/nfsm_subs.h> 76 #include <nfs/nfsrvcache.h> 77 #include <nfs/nfsmount.h> 78 #include <nfs/nfsnode.h> 79 #include <nfs/nqnfs.h> 80 #include <nfs/nfsrtt.h> 81 #include <nfs/nfs_var.h> 82 83 void nfsrv_zapsock __P((struct nfssvc_sock *)); 84 85 /* Global defs. */ 86 extern int32_t (*nfsrv3_procs[NFS_NPROCS]) __P((struct nfsrv_descript *, 87 struct nfssvc_sock *, 88 struct proc *, struct mbuf **)); 89 extern int nfs_numasync; 90 extern time_t nqnfsstarttime; 91 extern int nqsrv_writeslack; 92 extern int nfsrtton; 93 extern struct nfsstats nfsstats; 94 extern int nfsrvw_procrastinate; 95 struct nfssvc_sock *nfs_udpsock, *nfs_cltpsock; 96 int nuidhash_max = NFS_MAXUIDHASH; 97 int nfsd_waiting = 0; 98 #ifdef NFSSERVER 99 static int nfs_numnfsd = 0; 100 static int notstarted = 1; 101 static int modify_flag = 0; 102 static struct nfsdrt nfsdrt; 103 extern struct nfs_public nfs_pub; 104 #endif 105 106 #define TRUE 1 107 #define FALSE 0 108 109 #ifdef NFS 110 static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON]; 111 #endif 112 113 #ifdef NFSSERVER 114 static void nfsd_rt __P((int, struct nfsrv_descript *, int)); 115 #endif 116 117 /* 118 * NFS server system calls 119 * getfh() lives here too, but maybe should move to kern/vfs_syscalls.c 120 */ 121 122 /* 123 * Get file handle system call 124 */ 125 int 126 sys_getfh(p, v, retval) 127 struct proc *p; 128 register void *v; 129 register_t *retval; 130 { 131 register struct sys_getfh_args /* { 132 syscallarg(char *) fname; 133 syscallarg(fhandle_t *) fhp; 134 } */ *uap = v; 135 register struct vnode *vp; 136 fhandle_t fh; 137 int error; 138 struct nameidata nd; 139 140 /* 141 * Must be super user 142 */ 143 error = suser(p->p_ucred, &p->p_acflag); 144 if (error) 145 return (error); 146 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 147 SCARG(uap, fname), p); 148 error = namei(&nd); 149 if (error) 150 return (error); 151 vp = nd.ni_vp; 152 bzero((caddr_t)&fh, sizeof(fh)); 153 fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid; 154 error = VFS_VPTOFH(vp, &fh.fh_fid); 155 vput(vp); 156 if (error) 157 return (error); 158 error = copyout((caddr_t)&fh, (caddr_t)SCARG(uap, fhp), sizeof (fh)); 159 return (error); 160 } 161 162 /* 163 * Nfs server pseudo system call for the nfsd's 164 * Based on the flag value it either: 165 * - adds a socket to the selection list 166 * - remains in the kernel as an nfsd 167 * - remains in the kernel as an nfsiod 168 */ 169 int 170 sys_nfssvc(p, v, retval) 171 struct proc *p; 172 void *v; 173 register_t *retval; 174 { 175 register struct sys_nfssvc_args /* { 176 syscallarg(int) flag; 177 syscallarg(caddr_t) argp; 178 } */ *uap = v; 179 int error; 180 #ifdef NFS 181 struct nameidata nd; 182 struct nfsmount *nmp; 183 struct nfsd_cargs ncd; 184 #endif 185 #ifdef NFSSERVER 186 struct file *fp; 187 struct mbuf *nam; 188 struct nfsd_args nfsdarg; 189 struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs; 190 struct nfsd *nfsd; 191 struct nfssvc_sock *slp; 192 struct nfsuid *nuidp; 193 #endif 194 195 /* 196 * Must be super user 197 */ 198 error = suser(p->p_ucred, &p->p_acflag); 199 if(error) 200 return (error); 201 while (nfssvc_sockhead_flag & SLP_INIT) { 202 nfssvc_sockhead_flag |= SLP_WANTINIT; 203 (void) tsleep((caddr_t)&nfssvc_sockhead, PSOCK, "nfsd init", 0); 204 } 205 if (SCARG(uap, flag) & NFSSVC_BIOD) { 206 #ifdef NFS 207 error = nfssvc_iod(p); 208 #else 209 error = ENOSYS; 210 #endif 211 } else if (SCARG(uap, flag) & NFSSVC_MNTD) { 212 #ifndef NFS 213 error = ENOSYS; 214 #else 215 error = copyin(SCARG(uap, argp), (caddr_t)&ncd, sizeof (ncd)); 216 if (error) 217 return (error); 218 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 219 ncd.ncd_dirp, p); 220 error = namei(&nd); 221 if (error) 222 return (error); 223 if ((nd.ni_vp->v_flag & VROOT) == 0) 224 error = EINVAL; 225 nmp = VFSTONFS(nd.ni_vp->v_mount); 226 vput(nd.ni_vp); 227 if (error) 228 return (error); 229 if ((nmp->nm_iflag & NFSMNT_MNTD) && 230 (SCARG(uap, flag) & NFSSVC_GOTAUTH) == 0) 231 return (0); 232 nmp->nm_iflag |= NFSMNT_MNTD; 233 error = nqnfs_clientd(nmp, p->p_ucred, &ncd, SCARG(uap, flag), 234 SCARG(uap, argp), p); 235 #endif /* NFS */ 236 } else if (SCARG(uap, flag) & NFSSVC_ADDSOCK) { 237 #ifndef NFSSERVER 238 error = ENOSYS; 239 #else 240 error = copyin(SCARG(uap, argp), (caddr_t)&nfsdarg, 241 sizeof(nfsdarg)); 242 if (error) 243 return (error); 244 error = getsock(p->p_fd, nfsdarg.sock, &fp); 245 if (error) 246 return (error); 247 /* 248 * Get the client address for connected sockets. 249 */ 250 if (nfsdarg.name == NULL || nfsdarg.namelen == 0) 251 nam = (struct mbuf *)0; 252 else { 253 error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen, 254 MT_SONAME); 255 if (error) 256 return (error); 257 } 258 error = nfssvc_addsock(fp, nam); 259 #endif /* !NFSSERVER */ 260 } else { 261 #ifndef NFSSERVER 262 error = ENOSYS; 263 #else 264 error = copyin(SCARG(uap, argp), (caddr_t)nsd, sizeof (*nsd)); 265 if (error) 266 return (error); 267 if ((SCARG(uap, flag) & NFSSVC_AUTHIN) && 268 ((nfsd = nsd->nsd_nfsd)) != NULL && 269 (nfsd->nfsd_slp->ns_flag & SLP_VALID)) { 270 slp = nfsd->nfsd_slp; 271 272 /* 273 * First check to see if another nfsd has already 274 * added this credential. 275 */ 276 for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first; 277 nuidp != 0; nuidp = nuidp->nu_hash.le_next) { 278 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid && 279 (!nfsd->nfsd_nd->nd_nam2 || 280 netaddr_match(NU_NETFAM(nuidp), 281 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2))) 282 break; 283 } 284 if (nuidp) { 285 nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr); 286 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 287 } else { 288 /* 289 * Nope, so we will. 290 */ 291 if (slp->ns_numuids < nuidhash_max) { 292 slp->ns_numuids++; 293 nuidp = (struct nfsuid *) 294 malloc(sizeof (struct nfsuid), M_NFSUID, 295 M_WAITOK); 296 } else 297 nuidp = (struct nfsuid *)0; 298 if ((slp->ns_flag & SLP_VALID) == 0) { 299 if (nuidp) 300 free((caddr_t)nuidp, M_NFSUID); 301 } else { 302 if (nuidp == (struct nfsuid *)0) { 303 nuidp = slp->ns_uidlruhead.tqh_first; 304 LIST_REMOVE(nuidp, nu_hash); 305 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, 306 nu_lru); 307 if (nuidp->nu_flag & NU_NAM) 308 m_freem(nuidp->nu_nam); 309 } 310 nuidp->nu_flag = 0; 311 nuidp->nu_cr = nsd->nsd_cr; 312 if (nuidp->nu_cr.cr_ngroups > NGROUPS) 313 nuidp->nu_cr.cr_ngroups = NGROUPS; 314 nuidp->nu_cr.cr_ref = 1; 315 nuidp->nu_timestamp = nsd->nsd_timestamp; 316 nuidp->nu_expire = time.tv_sec + nsd->nsd_ttl; 317 /* 318 * and save the session key in nu_key. 319 */ 320 bcopy(nsd->nsd_key, nuidp->nu_key, 321 sizeof (nsd->nsd_key)); 322 if (nfsd->nfsd_nd->nd_nam2) { 323 struct sockaddr_in *saddr; 324 325 saddr = mtod(nfsd->nfsd_nd->nd_nam2, 326 struct sockaddr_in *); 327 switch (saddr->sin_family) { 328 case AF_INET: 329 nuidp->nu_flag |= NU_INETADDR; 330 nuidp->nu_inetaddr = 331 saddr->sin_addr.s_addr; 332 break; 333 case AF_ISO: 334 default: 335 nuidp->nu_flag |= NU_NAM; 336 nuidp->nu_nam = m_copym( 337 nfsd->nfsd_nd->nd_nam2, 0, 338 M_COPYALL, M_WAIT); 339 break; 340 }; 341 } 342 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp, 343 nu_lru); 344 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid), 345 nuidp, nu_hash); 346 nfsrv_setcred(&nuidp->nu_cr, 347 &nfsd->nfsd_nd->nd_cr); 348 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 349 } 350 } 351 } 352 if ((SCARG(uap, flag) & NFSSVC_AUTHINFAIL) && 353 (nfsd = nsd->nsd_nfsd)) 354 nfsd->nfsd_flag |= NFSD_AUTHFAIL; 355 error = nfssvc_nfsd(nsd, SCARG(uap, argp), p); 356 #endif /* !NFSSERVER */ 357 } 358 if (error == EINTR || error == ERESTART) 359 error = 0; 360 return (error); 361 } 362 363 #ifdef NFSSERVER 364 /* 365 * Adds a socket to the list for servicing by nfsds. 366 */ 367 int 368 nfssvc_addsock(fp, mynam) 369 struct file *fp; 370 struct mbuf *mynam; 371 { 372 register struct mbuf *m; 373 register int siz; 374 register struct nfssvc_sock *slp; 375 register struct socket *so; 376 struct nfssvc_sock *tslp; 377 int error, s; 378 379 so = (struct socket *)fp->f_data; 380 tslp = (struct nfssvc_sock *)0; 381 /* 382 * Add it to the list, as required. 383 */ 384 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 385 tslp = nfs_udpsock; 386 if (tslp->ns_flag & SLP_VALID) { 387 m_freem(mynam); 388 return (EPERM); 389 } 390 #ifdef ISO 391 } else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) { 392 tslp = nfs_cltpsock; 393 if (tslp->ns_flag & SLP_VALID) { 394 m_freem(mynam); 395 return (EPERM); 396 } 397 #endif /* ISO */ 398 } 399 if (so->so_type == SOCK_STREAM) 400 siz = NFS_MAXPACKET + sizeof (u_long); 401 else 402 siz = NFS_MAXPACKET; 403 error = soreserve(so, siz, siz); 404 if (error) { 405 m_freem(mynam); 406 return (error); 407 } 408 409 /* 410 * Set protocol specific options { for now TCP only } and 411 * reserve some space. For datagram sockets, this can get called 412 * repeatedly for the same socket, but that isn't harmful. 413 */ 414 if (so->so_type == SOCK_STREAM) { 415 MGET(m, M_WAIT, MT_SOOPTS); 416 *mtod(m, int32_t *) = 1; 417 m->m_len = sizeof(int32_t); 418 sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m); 419 } 420 if (so->so_proto->pr_domain->dom_family == AF_INET && 421 so->so_proto->pr_protocol == IPPROTO_TCP) { 422 MGET(m, M_WAIT, MT_SOOPTS); 423 *mtod(m, int32_t *) = 1; 424 m->m_len = sizeof(int32_t); 425 sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m); 426 } 427 so->so_rcv.sb_flags &= ~SB_NOINTR; 428 so->so_rcv.sb_timeo = 0; 429 so->so_snd.sb_flags &= ~SB_NOINTR; 430 so->so_snd.sb_timeo = 0; 431 if (tslp) 432 slp = tslp; 433 else { 434 slp = (struct nfssvc_sock *) 435 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 436 bzero((caddr_t)slp, sizeof (struct nfssvc_sock)); 437 TAILQ_INIT(&slp->ns_uidlruhead); 438 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); 439 } 440 slp->ns_so = so; 441 slp->ns_nam = mynam; 442 fp->f_count++; 443 slp->ns_fp = fp; 444 s = splsoftnet(); 445 so->so_upcallarg = (caddr_t)slp; 446 so->so_upcall = nfsrv_rcv; 447 so->so_rcv.sb_flags |= SB_UPCALL; 448 slp->ns_flag = (SLP_VALID | SLP_NEEDQ); 449 nfsrv_wakenfsd(slp); 450 splx(s); 451 return (0); 452 } 453 454 /* 455 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 456 * until it is killed by a signal. 457 */ 458 int 459 nfssvc_nfsd(nsd, argp, p) 460 struct nfsd_srvargs *nsd; 461 caddr_t argp; 462 struct proc *p; 463 { 464 register struct mbuf *m; 465 register int siz; 466 register struct nfssvc_sock *slp; 467 register struct socket *so; 468 register int *solockp; 469 struct nfsd *nfsd = nsd->nsd_nfsd; 470 struct nfsrv_descript *nd = NULL; 471 struct mbuf *mreq; 472 int error = 0, cacherep, s, sotype, writes_todo; 473 u_quad_t cur_usec; 474 475 #ifndef nolint 476 cacherep = RC_DOIT; 477 writes_todo = 0; 478 #endif 479 s = splsoftnet(); 480 if (nfsd == (struct nfsd *)0) { 481 nsd->nsd_nfsd = nfsd = (struct nfsd *) 482 malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK); 483 bzero((caddr_t)nfsd, sizeof (struct nfsd)); 484 nfsd->nfsd_procp = p; 485 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); 486 nfs_numnfsd++; 487 } 488 /* 489 * Loop getting rpc requests until SIGKILL. 490 */ 491 for (;;) { 492 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) { 493 while (nfsd->nfsd_slp == (struct nfssvc_sock *)0 && 494 (nfsd_head_flag & NFSD_CHECKSLP) == 0) { 495 nfsd->nfsd_flag |= NFSD_WAITING; 496 nfsd_waiting++; 497 error = tsleep((caddr_t)nfsd, PSOCK | PCATCH, 498 "nfsd", 0); 499 nfsd_waiting--; 500 if (error) 501 goto done; 502 } 503 if (nfsd->nfsd_slp == (struct nfssvc_sock *)0 && 504 (nfsd_head_flag & NFSD_CHECKSLP) != 0) { 505 for (slp = nfssvc_sockhead.tqh_first; slp != 0; 506 slp = slp->ns_chain.tqe_next) { 507 if ((slp->ns_flag & (SLP_VALID | SLP_DOREC)) 508 == (SLP_VALID | SLP_DOREC)) { 509 slp->ns_flag &= ~SLP_DOREC; 510 slp->ns_sref++; 511 nfsd->nfsd_slp = slp; 512 break; 513 } 514 } 515 if (slp == 0) 516 nfsd_head_flag &= ~NFSD_CHECKSLP; 517 } 518 if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0) 519 continue; 520 if (slp->ns_flag & SLP_VALID) { 521 if (slp->ns_flag & SLP_DISCONN) 522 nfsrv_zapsock(slp); 523 else if (slp->ns_flag & SLP_NEEDQ) { 524 slp->ns_flag &= ~SLP_NEEDQ; 525 (void) nfs_sndlock(&slp->ns_solock, 526 (struct nfsreq *)0); 527 nfsrv_rcv(slp->ns_so, (caddr_t)slp, 528 M_WAIT); 529 nfs_sndunlock(&slp->ns_solock); 530 } 531 error = nfsrv_dorec(slp, nfsd, &nd); 532 cur_usec = (u_quad_t)time.tv_sec * 1000000 + 533 (u_quad_t)time.tv_usec; 534 if (error && slp->ns_tq.lh_first && 535 slp->ns_tq.lh_first->nd_time <= cur_usec) { 536 error = 0; 537 cacherep = RC_DOIT; 538 writes_todo = 1; 539 } else 540 writes_todo = 0; 541 nfsd->nfsd_flag |= NFSD_REQINPROG; 542 } 543 } else { 544 error = 0; 545 slp = nfsd->nfsd_slp; 546 } 547 if (error || (slp->ns_flag & SLP_VALID) == 0) { 548 if (nd) { 549 free((caddr_t)nd, M_NFSRVDESC); 550 nd = NULL; 551 } 552 nfsd->nfsd_slp = (struct nfssvc_sock *)0; 553 nfsd->nfsd_flag &= ~NFSD_REQINPROG; 554 nfsrv_slpderef(slp); 555 continue; 556 } 557 splx(s); 558 so = slp->ns_so; 559 sotype = so->so_type; 560 if (so->so_proto->pr_flags & PR_CONNREQUIRED) 561 solockp = &slp->ns_solock; 562 else 563 solockp = (int *)0; 564 if (nd) { 565 nd->nd_starttime = time; 566 if (nd->nd_nam2) 567 nd->nd_nam = nd->nd_nam2; 568 else 569 nd->nd_nam = slp->ns_nam; 570 571 /* 572 * Check to see if authorization is needed. 573 */ 574 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { 575 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; 576 nsd->nsd_haddr = mtod(nd->nd_nam, 577 struct sockaddr_in *)->sin_addr.s_addr; 578 nsd->nsd_authlen = nfsd->nfsd_authlen; 579 nsd->nsd_verflen = nfsd->nfsd_verflen; 580 if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr, 581 nfsd->nfsd_authlen) && 582 !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr, 583 nfsd->nfsd_verflen) && 584 !copyout((caddr_t)nsd, argp, sizeof (*nsd))) 585 return (ENEEDAUTH); 586 cacherep = RC_DROPIT; 587 } else 588 cacherep = nfsrv_getcache(nd, slp, &mreq); 589 590 /* 591 * Check for just starting up for NQNFS and send 592 * fake "try again later" replies to the NQNFS clients. 593 */ 594 if (notstarted && nqnfsstarttime <= time.tv_sec) { 595 if (modify_flag) { 596 nqnfsstarttime = time.tv_sec + nqsrv_writeslack; 597 modify_flag = 0; 598 } else 599 notstarted = 0; 600 } 601 if (notstarted) { 602 if ((nd->nd_flag & ND_NQNFS) == 0) 603 cacherep = RC_DROPIT; 604 else if (nd->nd_procnum != NFSPROC_WRITE) { 605 nd->nd_procnum = NFSPROC_NOOP; 606 nd->nd_repstat = NQNFS_TRYLATER; 607 cacherep = RC_DOIT; 608 } else 609 modify_flag = 1; 610 } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { 611 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; 612 nd->nd_procnum = NFSPROC_NOOP; 613 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 614 cacherep = RC_DOIT; 615 } 616 } 617 618 /* 619 * Loop to get all the write rpc relies that have been 620 * gathered together. 621 */ 622 do { 623 switch (cacherep) { 624 case RC_DOIT: 625 if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE && 626 nfsrvw_procrastinate > 0 && !notstarted)) 627 error = nfsrv_writegather(&nd, slp, 628 nfsd->nfsd_procp, &mreq); 629 else 630 error = (*(nfsrv3_procs[nd->nd_procnum]))(nd, 631 slp, nfsd->nfsd_procp, &mreq); 632 if (mreq == NULL) 633 break; 634 if (error) { 635 if (nd->nd_procnum != NQNFSPROC_VACATED) 636 nfsstats.srv_errs++; 637 nfsrv_updatecache(nd, FALSE, mreq); 638 if (nd->nd_nam2) 639 m_freem(nd->nd_nam2); 640 break; 641 } 642 nfsstats.srvrpccnt[nd->nd_procnum]++; 643 nfsrv_updatecache(nd, TRUE, mreq); 644 nd->nd_mrep = (struct mbuf *)0; 645 case RC_REPLY: 646 m = mreq; 647 siz = 0; 648 while (m) { 649 siz += m->m_len; 650 m = m->m_next; 651 } 652 if (siz <= 0 || siz > NFS_MAXPACKET) { 653 printf("mbuf siz=%d\n",siz); 654 panic("Bad nfs svc reply"); 655 } 656 m = mreq; 657 m->m_pkthdr.len = siz; 658 m->m_pkthdr.rcvif = (struct ifnet *)0; 659 /* 660 * For stream protocols, prepend a Sun RPC 661 * Record Mark. 662 */ 663 if (sotype == SOCK_STREAM) { 664 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 665 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz); 666 } 667 if (solockp) 668 (void) nfs_sndlock(solockp, (struct nfsreq *)0); 669 if (slp->ns_flag & SLP_VALID) 670 error = nfs_send(so, nd->nd_nam2, m, NULL); 671 else { 672 error = EPIPE; 673 m_freem(m); 674 } 675 if (nfsrtton) 676 nfsd_rt(sotype, nd, cacherep); 677 if (nd->nd_nam2) 678 MFREE(nd->nd_nam2, m); 679 if (nd->nd_mrep) 680 m_freem(nd->nd_mrep); 681 if (error == EPIPE) 682 nfsrv_zapsock(slp); 683 if (solockp) 684 nfs_sndunlock(solockp); 685 if (error == EINTR || error == ERESTART) { 686 free((caddr_t)nd, M_NFSRVDESC); 687 nfsrv_slpderef(slp); 688 s = splsoftnet(); 689 goto done; 690 } 691 break; 692 case RC_DROPIT: 693 if (nfsrtton) 694 nfsd_rt(sotype, nd, cacherep); 695 m_freem(nd->nd_mrep); 696 m_freem(nd->nd_nam2); 697 break; 698 }; 699 if (nd) { 700 FREE((caddr_t)nd, M_NFSRVDESC); 701 nd = NULL; 702 } 703 704 /* 705 * Check to see if there are outstanding writes that 706 * need to be serviced. 707 */ 708 cur_usec = (u_quad_t)time.tv_sec * 1000000 + 709 (u_quad_t)time.tv_usec; 710 s = splsoftclock(); 711 if (slp->ns_tq.lh_first && 712 slp->ns_tq.lh_first->nd_time <= cur_usec) { 713 cacherep = RC_DOIT; 714 writes_todo = 1; 715 } else 716 writes_todo = 0; 717 splx(s); 718 } while (writes_todo); 719 s = splsoftnet(); 720 if (nfsrv_dorec(slp, nfsd, &nd)) { 721 nfsd->nfsd_flag &= ~NFSD_REQINPROG; 722 nfsd->nfsd_slp = NULL; 723 nfsrv_slpderef(slp); 724 } 725 } 726 done: 727 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); 728 splx(s); 729 free((caddr_t)nfsd, M_NFSD); 730 nsd->nsd_nfsd = (struct nfsd *)0; 731 if (--nfs_numnfsd == 0) 732 nfsrv_init(TRUE); /* Reinitialize everything */ 733 return (error); 734 } 735 736 /* 737 * Shut down a socket associated with an nfssvc_sock structure. 738 * Should be called with the send lock set, if required. 739 * The trick here is to increment the sref at the start, so that the nfsds 740 * will stop using it and clear ns_flag at the end so that it will not be 741 * reassigned during cleanup. 742 */ 743 void 744 nfsrv_zapsock(slp) 745 register struct nfssvc_sock *slp; 746 { 747 register struct nfsuid *nuidp, *nnuidp; 748 register struct nfsrv_descript *nwp, *nnwp; 749 struct socket *so; 750 struct file *fp; 751 struct mbuf *m; 752 int s; 753 754 slp->ns_flag &= ~SLP_ALLFLAGS; 755 fp = slp->ns_fp; 756 if (fp) { 757 slp->ns_fp = (struct file *)0; 758 so = slp->ns_so; 759 so->so_upcall = NULL; 760 so->so_upcallarg = NULL; 761 so->so_rcv.sb_flags &= ~SB_UPCALL; 762 soshutdown(so, 2); 763 closef(fp, (struct proc *)0); 764 if (slp->ns_nam) 765 MFREE(slp->ns_nam, m); 766 m_freem(slp->ns_raw); 767 m_freem(slp->ns_rec); 768 for (nuidp = slp->ns_uidlruhead.tqh_first; nuidp != 0; 769 nuidp = nnuidp) { 770 nnuidp = nuidp->nu_lru.tqe_next; 771 LIST_REMOVE(nuidp, nu_hash); 772 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); 773 if (nuidp->nu_flag & NU_NAM) 774 m_freem(nuidp->nu_nam); 775 free((caddr_t)nuidp, M_NFSUID); 776 } 777 s = splsoftclock(); 778 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) { 779 nnwp = nwp->nd_tq.le_next; 780 LIST_REMOVE(nwp, nd_tq); 781 free((caddr_t)nwp, M_NFSRVDESC); 782 } 783 LIST_INIT(&slp->ns_tq); 784 splx(s); 785 } 786 } 787 788 /* 789 * Derefence a server socket structure. If it has no more references and 790 * is no longer valid, you can throw it away. 791 */ 792 void 793 nfsrv_slpderef(slp) 794 register struct nfssvc_sock *slp; 795 { 796 if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) { 797 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 798 free((caddr_t)slp, M_NFSSVC); 799 } 800 } 801 802 /* 803 * Initialize the data structures for the server. 804 * Handshake with any new nfsds starting up to avoid any chance of 805 * corruption. 806 */ 807 void 808 nfsrv_init(terminating) 809 int terminating; 810 { 811 register struct nfssvc_sock *slp, *nslp; 812 813 if (nfssvc_sockhead_flag & SLP_INIT) 814 panic("nfsd init"); 815 nfssvc_sockhead_flag |= SLP_INIT; 816 if (terminating) { 817 for (slp = nfssvc_sockhead.tqh_first; slp != 0; slp = nslp) { 818 nslp = slp->ns_chain.tqe_next; 819 if (slp->ns_flag & SLP_VALID) 820 nfsrv_zapsock(slp); 821 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 822 free((caddr_t)slp, M_NFSSVC); 823 } 824 nfsrv_cleancache(); /* And clear out server cache */ 825 } else 826 nfs_pub.np_valid = 0; 827 828 TAILQ_INIT(&nfssvc_sockhead); 829 nfssvc_sockhead_flag &= ~SLP_INIT; 830 if (nfssvc_sockhead_flag & SLP_WANTINIT) { 831 nfssvc_sockhead_flag &= ~SLP_WANTINIT; 832 wakeup((caddr_t)&nfssvc_sockhead); 833 } 834 835 TAILQ_INIT(&nfsd_head); 836 nfsd_head_flag &= ~NFSD_CHECKSLP; 837 838 nfs_udpsock = (struct nfssvc_sock *) 839 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 840 bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock)); 841 TAILQ_INIT(&nfs_udpsock->ns_uidlruhead); 842 TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain); 843 844 nfs_cltpsock = (struct nfssvc_sock *) 845 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 846 bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock)); 847 TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead); 848 TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain); 849 } 850 851 /* 852 * Add entries to the server monitor log. 853 */ 854 static void 855 nfsd_rt(sotype, nd, cacherep) 856 int sotype; 857 register struct nfsrv_descript *nd; 858 int cacherep; 859 { 860 register struct drt *rt; 861 862 rt = &nfsdrt.drt[nfsdrt.pos]; 863 if (cacherep == RC_DOIT) 864 rt->flag = 0; 865 else if (cacherep == RC_REPLY) 866 rt->flag = DRT_CACHEREPLY; 867 else 868 rt->flag = DRT_CACHEDROP; 869 if (sotype == SOCK_STREAM) 870 rt->flag |= DRT_TCP; 871 if (nd->nd_flag & ND_NQNFS) 872 rt->flag |= DRT_NQNFS; 873 else if (nd->nd_flag & ND_NFSV3) 874 rt->flag |= DRT_NFSV3; 875 rt->proc = nd->nd_procnum; 876 if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET) 877 rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr; 878 else 879 rt->ipadr = INADDR_ANY; 880 rt->resptime = ((time.tv_sec - nd->nd_starttime.tv_sec) * 1000000) + 881 (time.tv_usec - nd->nd_starttime.tv_usec); 882 rt->tstamp = time; 883 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 884 } 885 #endif /* NFSSERVER */ 886 887 #ifdef NFS 888 889 int nfs_defect = 0; 890 /* 891 * Asynchronous I/O daemons for client nfs. 892 * They do read-ahead and write-behind operations on the block I/O cache. 893 * Never returns unless it fails or gets killed. 894 */ 895 int 896 nfssvc_iod(p) 897 struct proc *p; 898 { 899 register struct buf *bp; 900 register int i, myiod; 901 struct nfsmount *nmp; 902 int error = 0; 903 904 /* 905 * Assign my position or return error if too many already running 906 */ 907 myiod = -1; 908 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 909 if (nfs_asyncdaemon[i] == 0) { 910 nfs_asyncdaemon[i]++; 911 myiod = i; 912 break; 913 } 914 if (myiod == -1) 915 return (EBUSY); 916 nfs_numasync++; 917 /* 918 * Just loop around doin our stuff until SIGKILL 919 */ 920 for (;;) { 921 while (((nmp = nfs_iodmount[myiod]) == NULL 922 || nmp->nm_bufq.tqh_first == NULL) 923 && error == 0) { 924 if (nmp) 925 nmp->nm_bufqiods--; 926 nfs_iodwant[myiod] = p; 927 nfs_iodmount[myiod] = NULL; 928 error = tsleep((caddr_t)&nfs_iodwant[myiod], 929 PWAIT | PCATCH, "nfsidl", 0); 930 } 931 if (error) { 932 nfs_asyncdaemon[myiod] = 0; 933 if (nmp) 934 nmp->nm_bufqiods--; 935 nfs_iodmount[myiod] = NULL; 936 nfs_numasync--; 937 return (error); 938 } 939 while ((bp = nmp->nm_bufq.tqh_first) != NULL) { 940 /* Take one off the front of the list */ 941 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist); 942 nmp->nm_bufqlen--; 943 if (nmp->nm_bufqwant && nmp->nm_bufqlen < 2 * nfs_numasync) { 944 nmp->nm_bufqwant = FALSE; 945 wakeup(&nmp->nm_bufq); 946 } 947 if (bp->b_flags & B_READ) 948 (void) nfs_doio(bp, bp->b_rcred, (struct proc *)0); 949 else 950 (void) nfs_doio(bp, bp->b_wcred, (struct proc *)0); 951 /* 952 * If there are more than one iod on this mount, then defect 953 * so that the iods can be shared out fairly between the mounts 954 */ 955 if (nfs_defect && nmp->nm_bufqiods > 1) { 956 nfs_iodmount[myiod] = NULL; 957 nmp->nm_bufqiods--; 958 break; 959 } 960 } 961 } 962 } 963 964 965 /* 966 * Get an authorization string for the uid by having the mount_nfs sitting 967 * on this mount point porpous out of the kernel and do it. 968 */ 969 int 970 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key) 971 register struct nfsmount *nmp; 972 struct nfsreq *rep; 973 struct ucred *cred; 974 char **auth_str; 975 int *auth_len; 976 char *verf_str; 977 int *verf_len; 978 NFSKERBKEY_T key; /* return session key */ 979 { 980 int error = 0; 981 982 while ((nmp->nm_iflag & NFSMNT_WAITAUTH) == 0) { 983 nmp->nm_iflag |= NFSMNT_WANTAUTH; 984 (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK, 985 "nfsauth1", 2 * hz); 986 error = nfs_sigintr(nmp, rep, rep->r_procp); 987 if (error) { 988 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 989 return (error); 990 } 991 } 992 nmp->nm_iflag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH); 993 nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 994 nmp->nm_authlen = RPCAUTH_MAXSIZ; 995 nmp->nm_verfstr = verf_str; 996 nmp->nm_verflen = *verf_len; 997 nmp->nm_authuid = cred->cr_uid; 998 wakeup((caddr_t)&nmp->nm_authstr); 999 1000 /* 1001 * And wait for mount_nfs to do its stuff. 1002 */ 1003 while ((nmp->nm_iflag & NFSMNT_HASAUTH) == 0 && error == 0) { 1004 (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK, 1005 "nfsauth2", 2 * hz); 1006 error = nfs_sigintr(nmp, rep, rep->r_procp); 1007 } 1008 if (nmp->nm_iflag & NFSMNT_AUTHERR) { 1009 nmp->nm_iflag &= ~NFSMNT_AUTHERR; 1010 error = EAUTH; 1011 } 1012 if (error) 1013 free((caddr_t)*auth_str, M_TEMP); 1014 else { 1015 *auth_len = nmp->nm_authlen; 1016 *verf_len = nmp->nm_verflen; 1017 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key)); 1018 } 1019 nmp->nm_iflag &= ~NFSMNT_HASAUTH; 1020 nmp->nm_iflag |= NFSMNT_WAITAUTH; 1021 if (nmp->nm_iflag & NFSMNT_WANTAUTH) { 1022 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1023 wakeup((caddr_t)&nmp->nm_authtype); 1024 } 1025 return (error); 1026 } 1027 1028 /* 1029 * Get a nickname authenticator and verifier. 1030 */ 1031 int 1032 nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len) 1033 struct nfsmount *nmp; 1034 struct ucred *cred; 1035 char **auth_str; 1036 int *auth_len; 1037 char *verf_str; 1038 int verf_len; 1039 { 1040 register struct nfsuid *nuidp; 1041 register u_int32_t *nickp, *verfp; 1042 struct timeval ktvin, ktvout; 1043 1044 #ifdef DIAGNOSTIC 1045 if (verf_len < (4 * NFSX_UNSIGNED)) 1046 panic("nfs_getnickauth verf too small"); 1047 #endif 1048 for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first; 1049 nuidp != 0; nuidp = nuidp->nu_hash.le_next) { 1050 if (nuidp->nu_cr.cr_uid == cred->cr_uid) 1051 break; 1052 } 1053 if (!nuidp || nuidp->nu_expire < time.tv_sec) 1054 return (EACCES); 1055 1056 /* 1057 * Move to the end of the lru list (end of lru == most recently used). 1058 */ 1059 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 1060 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); 1061 1062 nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); 1063 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); 1064 *nickp = txdr_unsigned(nuidp->nu_nickname); 1065 *auth_str = (char *)nickp; 1066 *auth_len = 2 * NFSX_UNSIGNED; 1067 1068 /* 1069 * Now we must encrypt the verifier and package it up. 1070 */ 1071 verfp = (u_int32_t *)verf_str; 1072 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); 1073 if (time.tv_sec > nuidp->nu_timestamp.tv_sec || 1074 (time.tv_sec == nuidp->nu_timestamp.tv_sec && 1075 time.tv_usec > nuidp->nu_timestamp.tv_usec)) 1076 nuidp->nu_timestamp = time; 1077 else 1078 nuidp->nu_timestamp.tv_usec++; 1079 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec); 1080 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec); 1081 1082 /* 1083 * Now encrypt the timestamp verifier in ecb mode using the session 1084 * key. 1085 */ 1086 #ifdef NFSKERB 1087 XXX 1088 #endif 1089 1090 *verfp++ = ktvout.tv_sec; 1091 *verfp++ = ktvout.tv_usec; 1092 *verfp = 0; 1093 return (0); 1094 } 1095 1096 /* 1097 * Save the current nickname in a hash list entry on the mount point. 1098 */ 1099 int 1100 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep) 1101 register struct nfsmount *nmp; 1102 struct ucred *cred; 1103 int len; 1104 NFSKERBKEY_T key; 1105 struct mbuf **mdp; 1106 char **dposp; 1107 struct mbuf *mrep; 1108 { 1109 register struct nfsuid *nuidp; 1110 register u_int32_t *tl; 1111 register int32_t t1; 1112 struct mbuf *md = *mdp; 1113 struct timeval ktvin, ktvout; 1114 u_int32_t nick; 1115 char *dpos = *dposp, *cp2; 1116 int deltasec, error = 0; 1117 1118 if (len == (3 * NFSX_UNSIGNED)) { 1119 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1120 ktvin.tv_sec = *tl++; 1121 ktvin.tv_usec = *tl++; 1122 nick = fxdr_unsigned(u_int32_t, *tl); 1123 1124 /* 1125 * Decrypt the timestamp in ecb mode. 1126 */ 1127 #ifdef NFSKERB 1128 XXX 1129 #endif 1130 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec); 1131 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec); 1132 deltasec = time.tv_sec - ktvout.tv_sec; 1133 if (deltasec < 0) 1134 deltasec = -deltasec; 1135 /* 1136 * If ok, add it to the hash list for the mount point. 1137 */ 1138 if (deltasec <= NFS_KERBCLOCKSKEW) { 1139 if (nmp->nm_numuids < nuidhash_max) { 1140 nmp->nm_numuids++; 1141 nuidp = (struct nfsuid *) 1142 malloc(sizeof (struct nfsuid), M_NFSUID, 1143 M_WAITOK); 1144 } else { 1145 nuidp = nmp->nm_uidlruhead.tqh_first; 1146 LIST_REMOVE(nuidp, nu_hash); 1147 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, 1148 nu_lru); 1149 } 1150 nuidp->nu_flag = 0; 1151 nuidp->nu_cr.cr_uid = cred->cr_uid; 1152 nuidp->nu_expire = time.tv_sec + NFS_KERBTTL; 1153 nuidp->nu_timestamp = ktvout; 1154 nuidp->nu_nickname = nick; 1155 bcopy(key, nuidp->nu_key, sizeof (key)); 1156 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, 1157 nu_lru); 1158 LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid), 1159 nuidp, nu_hash); 1160 } 1161 } else 1162 nfsm_adv(nfsm_rndup(len)); 1163 nfsmout: 1164 *mdp = md; 1165 *dposp = dpos; 1166 return (error); 1167 } 1168 #endif /* NFS */ 1169
Indexes created Tue Oct 21 05:10:09 GMT 2025