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sys/nfs/nfs_syscalls.c
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1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)nfs_syscalls.c 8.3 (Berkeley) 1/4/94 37 * $FreeBSD: src/sys/nfs/nfs_syscalls.c,v 1.14.2.5 1999/09/05 08:19:45 peter Exp $ 38 */ 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/sysproto.h> 43 #include <sys/kernel.h> 44 #include <sys/sysctl.h> 45 #include <sys/file.h> 46 #include <sys/filedesc.h> 47 #include <sys/stat.h> 48 #include <sys/vnode.h> 49 #include <sys/mount.h> 50 #include <sys/proc.h> 51 #include <sys/uio.h> 52 #include <sys/malloc.h> 53 #include <sys/buf.h> 54 #include <sys/mbuf.h> 55 #include <sys/socket.h> 56 #include <sys/socketvar.h> 57 #include <sys/domain.h> 58 #include <sys/protosw.h> 59 #include <sys/namei.h> 60 #include <sys/syslog.h> 61 62 #include <netinet/in.h> 63 #include <netinet/tcp.h> 64 #ifdef ISO 65 #include <netiso/iso.h> 66 #endif 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/nqnfs.h> 76 #include <nfs/nfsrtt.h> 77 78 /* Global defs. */ 79 extern int (*nfsrv3_procs[NFS_NPROCS]) __P((struct nfsrv_descript *nd, 80 struct nfssvc_sock *slp, 81 struct proc *procp, 82 struct mbuf **mreqp)); 83 extern int nfs_numasync; 84 extern time_t nqnfsstarttime; 85 extern int nqsrv_writeslack; 86 extern int nfsrtton; 87 extern struct nfsstats nfsstats; 88 extern int nfsrvw_procrastinate; 89 extern int nfsrvw_procrastinate_v3; 90 struct nfssvc_sock *nfs_udpsock, *nfs_cltpsock; 91 static int nuidhash_max = NFS_MAXUIDHASH; 92 93 static void nfsrv_zapsock __P((struct nfssvc_sock *slp)); 94 static int nfssvc_iod __P((struct proc *)); 95 96 #define TRUE 1 97 #define FALSE 0 98 99 static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON]; 100 101 102 #ifndef NFS_NOSERVER 103 int nfsd_waiting = 0; 104 static struct nfsdrt nfsdrt; 105 static int nfs_numnfsd = 0; 106 static int notstarted = 1; 107 static int modify_flag = 0; 108 static void nfsd_rt __P((int sotype, struct nfsrv_descript *nd, 109 int cacherep)); 110 static int nfssvc_addsock __P((struct file *,struct mbuf *)); 111 static int nfssvc_nfsd __P((struct nfsd_srvargs *,caddr_t,struct proc *)); 112 113 static int nfs_privport = 0; 114 SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport, 0, ""); 115 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0, ""); 116 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0, ""); 117 118 /* 119 * NFS server system calls 120 * getfh() lives here too, but maybe should move to kern/vfs_syscalls.c 121 */ 122 123 /* 124 * Get file handle system call 125 */ 126 #ifndef _SYS_SYSPROTO_H_ 127 struct getfh_args { 128 char *fname; 129 fhandle_t *fhp; 130 }; 131 #endif 132 int 133 getfh(p, uap, retval) 134 struct proc *p; 135 register struct getfh_args *uap; 136 int *retval; 137 { 138 register struct vnode *vp; 139 fhandle_t fh; 140 int error; 141 struct nameidata nd; 142 143 /* 144 * Must be super user 145 */ 146 error = suser(p->p_ucred, &p->p_acflag); 147 if(error) 148 return (error); 149 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, p); 150 error = namei(&nd); 151 if (error) 152 return (error); 153 vp = nd.ni_vp; 154 bzero((caddr_t)&fh, sizeof(fh)); 155 fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid; 156 error = VFS_VPTOFH(vp, &fh.fh_fid); 157 vput(vp); 158 if (error) 159 return (error); 160 error = copyout((caddr_t)&fh, (caddr_t)uap->fhp, sizeof (fh)); 161 return (error); 162 } 163 164 #endif /* NFS_NOSERVER */ 165 /* 166 * Nfs server psuedo system call for the nfsd's 167 * Based on the flag value it either: 168 * - adds a socket to the selection list 169 * - remains in the kernel as an nfsd 170 * - remains in the kernel as an nfsiod 171 */ 172 #ifndef _SYS_SYSPROTO_H_ 173 struct nfssvc_args { 174 int flag; 175 caddr_t argp; 176 }; 177 #endif 178 int 179 nfssvc(p, uap, retval) 180 struct proc *p; 181 register struct nfssvc_args *uap; 182 int *retval; 183 { 184 #ifndef NFS_NOSERVER 185 struct nameidata nd; 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_cargs ncd; 191 struct nfsd *nfsd; 192 struct nfssvc_sock *slp; 193 struct nfsuid *nuidp; 194 struct nfsmount *nmp; 195 #endif /* NFS_NOSERVER */ 196 int error; 197 198 /* 199 * Must be super user 200 */ 201 error = suser(p->p_ucred, &p->p_acflag); 202 if(error) 203 return (error); 204 while (nfssvc_sockhead_flag & SLP_INIT) { 205 nfssvc_sockhead_flag |= SLP_WANTINIT; 206 (void) tsleep((caddr_t)&nfssvc_sockhead, PSOCK, "nfsd init", 0); 207 } 208 if (uap->flag & NFSSVC_BIOD) 209 error = nfssvc_iod(p); 210 #ifdef NFS_NOSERVER 211 else 212 error = ENXIO; 213 #else /* !NFS_NOSERVER */ 214 else if (uap->flag & NFSSVC_MNTD) { 215 error = copyin(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_flag & NFSMNT_MNTD) && 230 (uap->flag & NFSSVC_GOTAUTH) == 0) 231 return (0); 232 nmp->nm_flag |= NFSMNT_MNTD; 233 error = nqnfs_clientd(nmp, p->p_ucred, &ncd, uap->flag, 234 uap->argp, p); 235 } else if (uap->flag & NFSSVC_ADDSOCK) { 236 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg)); 237 if (error) 238 return (error); 239 error = getsock(p->p_fd, nfsdarg.sock, &fp); 240 if (error) 241 return (error); 242 /* 243 * Get the client address for connected sockets. 244 */ 245 if (nfsdarg.name == NULL || nfsdarg.namelen == 0) 246 nam = (struct mbuf *)0; 247 else { 248 error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen, 249 MT_SONAME); 250 if (error) 251 return (error); 252 } 253 error = nfssvc_addsock(fp, nam); 254 } else { 255 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd)); 256 if (error) 257 return (error); 258 if ((uap->flag & NFSSVC_AUTHIN) && ((nfsd = nsd->nsd_nfsd)) && 259 (nfsd->nfsd_slp->ns_flag & 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 for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first; 267 nuidp != 0; nuidp = nuidp->nu_hash.le_next) { 268 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid && 269 (!nfsd->nfsd_nd->nd_nam2 || 270 netaddr_match(NU_NETFAM(nuidp), 271 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2))) 272 break; 273 } 274 if (nuidp) { 275 nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr); 276 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 277 } else { 278 /* 279 * Nope, so we will. 280 */ 281 if (slp->ns_numuids < nuidhash_max) { 282 slp->ns_numuids++; 283 nuidp = (struct nfsuid *) 284 malloc(sizeof (struct nfsuid), M_NFSUID, 285 M_WAITOK); 286 } else 287 nuidp = (struct nfsuid *)0; 288 if ((slp->ns_flag & SLP_VALID) == 0) { 289 if (nuidp) 290 free((caddr_t)nuidp, M_NFSUID); 291 } else { 292 if (nuidp == (struct nfsuid *)0) { 293 nuidp = slp->ns_uidlruhead.tqh_first; 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 nuidp->nu_cr = nsd->nsd_cr; 302 if (nuidp->nu_cr.cr_ngroups > NGROUPS) 303 nuidp->nu_cr.cr_ngroups = NGROUPS; 304 nuidp->nu_cr.cr_ref = 1; 305 nuidp->nu_timestamp = nsd->nsd_timestamp; 306 nuidp->nu_expire = time.tv_sec + nsd->nsd_ttl; 307 /* 308 * and save the session key in nu_key. 309 */ 310 bcopy(nsd->nsd_key, nuidp->nu_key, 311 sizeof (nsd->nsd_key)); 312 if (nfsd->nfsd_nd->nd_nam2) { 313 struct sockaddr_in *saddr; 314 315 saddr = mtod(nfsd->nfsd_nd->nd_nam2, 316 struct sockaddr_in *); 317 switch (saddr->sin_family) { 318 case AF_INET: 319 nuidp->nu_flag |= NU_INETADDR; 320 nuidp->nu_inetaddr = 321 saddr->sin_addr.s_addr; 322 break; 323 case AF_ISO: 324 default: 325 nuidp->nu_flag |= NU_NAM; 326 nuidp->nu_nam = m_copym( 327 nfsd->nfsd_nd->nd_nam2, 0, 328 M_COPYALL, M_WAIT); 329 break; 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 nfsrv_setcred(&nuidp->nu_cr, 337 &nfsd->nfsd_nd->nd_cr); 338 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 339 } 340 } 341 } 342 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd)) 343 nfsd->nfsd_flag |= NFSD_AUTHFAIL; 344 error = nfssvc_nfsd(nsd, uap->argp, p); 345 } 346 #endif /* NFS_NOSERVER */ 347 if (error == EINTR || error == ERESTART) 348 error = 0; 349 return (error); 350 } 351 352 #ifndef NFS_NOSERVER 353 /* 354 * Adds a socket to the list for servicing by nfsds. 355 */ 356 static int 357 nfssvc_addsock(fp, mynam) 358 struct file *fp; 359 struct mbuf *mynam; 360 { 361 register struct mbuf *m; 362 register int siz; 363 register struct nfssvc_sock *slp; 364 register struct socket *so; 365 struct nfssvc_sock *tslp; 366 int error, s; 367 368 so = (struct socket *)fp->f_data; 369 tslp = (struct nfssvc_sock *)0; 370 /* 371 * Add it to the list, as required. 372 */ 373 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 374 tslp = nfs_udpsock; 375 if (tslp->ns_flag & SLP_VALID) { 376 m_freem(mynam); 377 return (EPERM); 378 } 379 #ifdef ISO 380 } else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) { 381 tslp = nfs_cltpsock; 382 if (tslp->ns_flag & SLP_VALID) { 383 m_freem(mynam); 384 return (EPERM); 385 } 386 #endif /* ISO */ 387 } 388 if (so->so_type == SOCK_STREAM) 389 siz = NFS_MAXPACKET + sizeof (u_long); 390 else 391 siz = NFS_MAXPACKET; 392 error = soreserve(so, siz, siz); 393 if (error) { 394 m_freem(mynam); 395 return (error); 396 } 397 398 /* 399 * Set protocol specific options { for now TCP only } and 400 * reserve some space. For datagram sockets, this can get called 401 * repeatedly for the same socket, but that isn't harmful. 402 */ 403 if (so->so_type == SOCK_STREAM) { 404 MGET(m, M_WAIT, MT_SOOPTS); 405 *mtod(m, int *) = 1; 406 m->m_len = sizeof(int); 407 sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m); 408 } 409 if (so->so_proto->pr_domain->dom_family == AF_INET && 410 so->so_proto->pr_protocol == IPPROTO_TCP) { 411 MGET(m, M_WAIT, MT_SOOPTS); 412 *mtod(m, int *) = 1; 413 m->m_len = sizeof(int); 414 sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m); 415 } 416 so->so_rcv.sb_flags &= ~SB_NOINTR; 417 so->so_rcv.sb_timeo = 0; 418 so->so_snd.sb_flags &= ~SB_NOINTR; 419 so->so_snd.sb_timeo = 0; 420 if (tslp) 421 slp = tslp; 422 else { 423 slp = (struct nfssvc_sock *) 424 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 425 bzero((caddr_t)slp, sizeof (struct nfssvc_sock)); 426 TAILQ_INIT(&slp->ns_uidlruhead); 427 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); 428 } 429 slp->ns_so = so; 430 slp->ns_nam = mynam; 431 fp->f_count++; 432 slp->ns_fp = fp; 433 s = splnet(); 434 so->so_upcallarg = (caddr_t)slp; 435 so->so_upcall = nfsrv_rcv; 436 slp->ns_flag = (SLP_VALID | SLP_NEEDQ); 437 nfsrv_wakenfsd(slp); 438 splx(s); 439 return (0); 440 } 441 442 /* 443 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 444 * until it is killed by a signal. 445 */ 446 static int 447 nfssvc_nfsd(nsd, argp, p) 448 struct nfsd_srvargs *nsd; 449 caddr_t argp; 450 struct proc *p; 451 { 452 register struct mbuf *m; 453 register int siz; 454 register struct nfssvc_sock *slp; 455 register struct socket *so; 456 register int *solockp; 457 struct nfsd *nfsd = nsd->nsd_nfsd; 458 struct nfsrv_descript *nd = NULL; 459 struct mbuf *mreq; 460 int error = 0, cacherep, s, sotype, writes_todo; 461 int procrastinate; 462 u_quad_t cur_usec; 463 464 #ifndef nolint 465 cacherep = RC_DOIT; 466 writes_todo = 0; 467 #endif 468 s = splnet(); 469 if (nfsd == (struct nfsd *)0) { 470 nsd->nsd_nfsd = nfsd = (struct nfsd *) 471 malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK); 472 bzero((caddr_t)nfsd, sizeof (struct nfsd)); 473 nfsd->nfsd_procp = p; 474 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); 475 nfs_numnfsd++; 476 } 477 /* 478 * Loop getting rpc requests until SIGKILL. 479 */ 480 for (;;) { 481 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) { 482 while (nfsd->nfsd_slp == (struct nfssvc_sock *)0 && 483 (nfsd_head_flag & NFSD_CHECKSLP) == 0) { 484 nfsd->nfsd_flag |= NFSD_WAITING; 485 nfsd_waiting++; 486 error = tsleep((caddr_t)nfsd, PSOCK | PCATCH, 487 "nfsd", 0); 488 nfsd_waiting--; 489 if (error) 490 goto done; 491 } 492 if (nfsd->nfsd_slp == (struct nfssvc_sock *)0 && 493 (nfsd_head_flag & NFSD_CHECKSLP) != 0) { 494 for (slp = nfssvc_sockhead.tqh_first; slp != 0; 495 slp = slp->ns_chain.tqe_next) { 496 if ((slp->ns_flag & (SLP_VALID | SLP_DOREC)) 497 == (SLP_VALID | SLP_DOREC)) { 498 slp->ns_flag &= ~SLP_DOREC; 499 slp->ns_sref++; 500 nfsd->nfsd_slp = slp; 501 break; 502 } 503 } 504 if (slp == 0) 505 nfsd_head_flag &= ~NFSD_CHECKSLP; 506 } 507 if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0) 508 continue; 509 if (slp->ns_flag & SLP_VALID) { 510 if (slp->ns_flag & SLP_DISCONN) 511 nfsrv_zapsock(slp); 512 else if (slp->ns_flag & SLP_NEEDQ) { 513 slp->ns_flag &= ~SLP_NEEDQ; 514 (void) nfs_sndlock(&slp->ns_solock, 515 (struct nfsreq *)0); 516 nfsrv_rcv(slp->ns_so, (caddr_t)slp, 517 M_WAIT); 518 nfs_sndunlock(&slp->ns_solock); 519 } 520 error = nfsrv_dorec(slp, nfsd, &nd); 521 cur_usec = (u_quad_t)time.tv_sec * 1000000 + 522 (u_quad_t)time.tv_usec; 523 if (error && slp->ns_tq.lh_first && 524 slp->ns_tq.lh_first->nd_time <= cur_usec) { 525 error = 0; 526 cacherep = RC_DOIT; 527 writes_todo = 1; 528 } else 529 writes_todo = 0; 530 nfsd->nfsd_flag |= NFSD_REQINPROG; 531 } 532 } else { 533 error = 0; 534 slp = nfsd->nfsd_slp; 535 } 536 if (error || (slp->ns_flag & SLP_VALID) == 0) { 537 if (nd) { 538 free((caddr_t)nd, M_NFSRVDESC); 539 nd = NULL; 540 } 541 nfsd->nfsd_slp = (struct nfssvc_sock *)0; 542 nfsd->nfsd_flag &= ~NFSD_REQINPROG; 543 nfsrv_slpderef(slp); 544 continue; 545 } 546 splx(s); 547 so = slp->ns_so; 548 sotype = so->so_type; 549 if (so->so_proto->pr_flags & PR_CONNREQUIRED) 550 solockp = &slp->ns_solock; 551 else 552 solockp = (int *)0; 553 if (nd) { 554 nd->nd_starttime = time; 555 if (nd->nd_nam2) 556 nd->nd_nam = nd->nd_nam2; 557 else 558 nd->nd_nam = slp->ns_nam; 559 560 /* 561 * Check to see if authorization is needed. 562 */ 563 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { 564 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; 565 nsd->nsd_haddr = mtod(nd->nd_nam, 566 struct sockaddr_in *)->sin_addr.s_addr; 567 nsd->nsd_authlen = nfsd->nfsd_authlen; 568 nsd->nsd_verflen = nfsd->nfsd_verflen; 569 if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr, 570 nfsd->nfsd_authlen) && 571 !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr, 572 nfsd->nfsd_verflen) && 573 !copyout((caddr_t)nsd, argp, sizeof (*nsd))) 574 return (ENEEDAUTH); 575 cacherep = RC_DROPIT; 576 } else 577 cacherep = nfsrv_getcache(nd, slp, &mreq); 578 579 /* 580 * Check for just starting up for NQNFS and send 581 * fake "try again later" replies to the NQNFS clients. 582 */ 583 if (notstarted && nqnfsstarttime <= time.tv_sec) { 584 if (modify_flag) { 585 nqnfsstarttime = time.tv_sec + nqsrv_writeslack; 586 modify_flag = 0; 587 } else 588 notstarted = 0; 589 } 590 if (notstarted) { 591 if ((nd->nd_flag & ND_NQNFS) == 0) 592 cacherep = RC_DROPIT; 593 else if (nd->nd_procnum != NFSPROC_WRITE) { 594 nd->nd_procnum = NFSPROC_NOOP; 595 nd->nd_repstat = NQNFS_TRYLATER; 596 cacherep = RC_DOIT; 597 } else 598 modify_flag = 1; 599 } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { 600 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; 601 nd->nd_procnum = NFSPROC_NOOP; 602 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 603 cacherep = RC_DOIT; 604 } else if (nfs_privport) { 605 /* Check if source port is privileged */ 606 u_short port; 607 u_long addr; 608 struct mbuf *nam = nd->nd_nam; 609 struct sockaddr_in *sin; 610 611 sin = mtod(nam, struct sockaddr_in *); 612 port = ntohs(sin->sin_port); 613 if (port >= IPPORT_RESERVED && 614 nd->nd_procnum != NFSPROC_NULL) { 615 nd->nd_procnum = NFSPROC_NOOP; 616 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 617 cacherep = RC_DOIT; 618 printf("NFS request from unprivileged port (%s:%d)\n", 619 inet_ntoa(sin->sin_addr), port); 620 } 621 } 622 623 } 624 625 /* 626 * Loop to get all the write rpc relies that have been 627 * gathered together. 628 */ 629 do { 630 switch (cacherep) { 631 case RC_DOIT: 632 if (nd && (nd->nd_flag & ND_NFSV3)) 633 procrastinate = nfsrvw_procrastinate_v3; 634 else 635 procrastinate = nfsrvw_procrastinate; 636 if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE && 637 procrastinate > 0 && !notstarted)) 638 error = nfsrv_writegather(&nd, slp, 639 nfsd->nfsd_procp, &mreq); 640 else 641 error = (*(nfsrv3_procs[nd->nd_procnum]))(nd, 642 slp, nfsd->nfsd_procp, &mreq); 643 if (mreq == NULL) 644 break; 645 if (error) { 646 if (nd->nd_procnum != NQNFSPROC_VACATED) 647 nfsstats.srv_errs++; 648 nfsrv_updatecache(nd, FALSE, mreq); 649 if (nd->nd_nam2) 650 m_freem(nd->nd_nam2); 651 break; 652 } 653 nfsstats.srvrpccnt[nd->nd_procnum]++; 654 nfsrv_updatecache(nd, TRUE, mreq); 655 nd->nd_mrep = (struct mbuf *)0; 656 case RC_REPLY: 657 m = mreq; 658 siz = 0; 659 while (m) { 660 siz += m->m_len; 661 m = m->m_next; 662 } 663 if (siz <= 0 || siz > NFS_MAXPACKET) { 664 printf("mbuf siz=%d\n",siz); 665 panic("Bad nfs svc reply"); 666 } 667 m = mreq; 668 m->m_pkthdr.len = siz; 669 m->m_pkthdr.rcvif = (struct ifnet *)0; 670 /* 671 * For stream protocols, prepend a Sun RPC 672 * Record Mark. 673 */ 674 if (sotype == SOCK_STREAM) { 675 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 676 *mtod(m, u_long *) = htonl(0x80000000 | siz); 677 } 678 if (solockp) 679 (void) nfs_sndlock(solockp, (struct nfsreq *)0); 680 if (slp->ns_flag & SLP_VALID) 681 error = nfs_send(so, nd->nd_nam2, m, NULL); 682 else { 683 error = EPIPE; 684 m_freem(m); 685 } 686 if (nfsrtton) 687 nfsd_rt(sotype, nd, cacherep); 688 if (nd->nd_nam2) 689 MFREE(nd->nd_nam2, m); 690 if (nd->nd_mrep) 691 m_freem(nd->nd_mrep); 692 if (error == EPIPE) 693 nfsrv_zapsock(slp); 694 if (solockp) 695 nfs_sndunlock(solockp); 696 if (error == EINTR || error == ERESTART) { 697 free((caddr_t)nd, M_NFSRVDESC); 698 nfsrv_slpderef(slp); 699 s = splnet(); 700 goto done; 701 } 702 break; 703 case RC_DROPIT: 704 if (nfsrtton) 705 nfsd_rt(sotype, nd, cacherep); 706 m_freem(nd->nd_mrep); 707 m_freem(nd->nd_nam2); 708 break; 709 }; 710 if (nd) { 711 FREE((caddr_t)nd, M_NFSRVDESC); 712 nd = NULL; 713 } 714 715 /* 716 * Check to see if there are outstanding writes that 717 * need to be serviced. 718 */ 719 cur_usec = (u_quad_t)time.tv_sec * 1000000 + 720 (u_quad_t)time.tv_usec; 721 s = splsoftclock(); 722 if (slp->ns_tq.lh_first && 723 slp->ns_tq.lh_first->nd_time <= cur_usec) { 724 cacherep = RC_DOIT; 725 writes_todo = 1; 726 } else 727 writes_todo = 0; 728 splx(s); 729 } while (writes_todo); 730 s = splnet(); 731 if (nfsrv_dorec(slp, nfsd, &nd)) { 732 nfsd->nfsd_flag &= ~NFSD_REQINPROG; 733 nfsd->nfsd_slp = NULL; 734 nfsrv_slpderef(slp); 735 } 736 } 737 done: 738 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); 739 splx(s); 740 free((caddr_t)nfsd, M_NFSD); 741 nsd->nsd_nfsd = (struct nfsd *)0; 742 if (--nfs_numnfsd == 0) 743 nfsrv_init(TRUE); /* Reinitialize everything */ 744 return (error); 745 } 746 #endif /* NFS_NOSERVER */ 747 748 int nfs_defect = 0; 749 SYSCTL_INT(_vfs_nfs, OID_AUTO, defect, CTLFLAG_RW, &nfs_defect, 0, ""); 750 751 /* 752 * Asynchronous I/O daemons for client nfs. 753 * They do read-ahead and write-behind operations on the block I/O cache. 754 * Never returns unless it fails or gets killed. 755 */ 756 static int 757 nfssvc_iod(p) 758 struct proc *p; 759 { 760 register struct buf *bp, *nbp; 761 register int i, myiod; 762 struct vnode *vp; 763 struct nfsmount *nmp; 764 int error = 0, s; 765 766 /* 767 * Assign my position or return error if too many already running 768 */ 769 myiod = -1; 770 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 771 if (nfs_asyncdaemon[i] == 0) { 772 nfs_asyncdaemon[i]++; 773 myiod = i; 774 break; 775 } 776 if (myiod == -1) 777 return (EBUSY); 778 nfs_numasync++; 779 /* 780 * Just loop around doin our stuff until SIGKILL 781 */ 782 for (;;) { 783 while (((nmp = nfs_iodmount[myiod]) == NULL 784 || nmp->nm_bufq.tqh_first == NULL) 785 && error == 0) { 786 if (nmp) 787 nmp->nm_bufqiods--; 788 nfs_iodwant[myiod] = p; 789 nfs_iodmount[myiod] = NULL; 790 error = tsleep((caddr_t)&nfs_iodwant[myiod], 791 PWAIT | PCATCH, "nfsidl", 0); 792 } 793 if (error) { 794 nfs_asyncdaemon[myiod] = 0; 795 if (nmp) nmp->nm_bufqiods--; 796 nfs_iodmount[myiod] = NULL; 797 nfs_numasync--; 798 return (error); 799 } 800 while ((bp = nmp->nm_bufq.tqh_first) != NULL) { 801 /* Take one off the front of the list */ 802 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist); 803 nmp->nm_bufqlen--; 804 if (nmp->nm_bufqwant && nmp->nm_bufqlen < 2 * nfs_numasync) { 805 nmp->nm_bufqwant = FALSE; 806 wakeup(&nmp->nm_bufq); 807 } 808 if (bp->b_flags & B_READ) 809 (void) nfs_doio(bp, bp->b_rcred, (struct proc *)0); 810 else 811 (void) nfs_doio(bp, bp->b_wcred, (struct proc *)0); 812 813 /* 814 * If there are more than one iod on this mount, then defect 815 * so that the iods can be shared out fairly between the mounts 816 */ 817 if (nfs_defect && nmp->nm_bufqiods > 1) { 818 NFS_DPF(ASYNCIO, 819 ("nfssvc_iod: iod %d defecting from mount %p\n", 820 myiod, nmp)); 821 nfs_iodmount[myiod] = NULL; 822 nmp->nm_bufqiods--; 823 break; 824 } 825 } 826 } 827 } 828 829 /* 830 * Shut down a socket associated with an nfssvc_sock structure. 831 * Should be called with the send lock set, if required. 832 * The trick here is to increment the sref at the start, so that the nfsds 833 * will stop using it and clear ns_flag at the end so that it will not be 834 * reassigned during cleanup. 835 */ 836 static void 837 nfsrv_zapsock(slp) 838 register struct nfssvc_sock *slp; 839 { 840 register struct nfsuid *nuidp, *nnuidp; 841 register struct nfsrv_descript *nwp, *nnwp; 842 struct socket *so; 843 struct file *fp; 844 struct mbuf *m; 845 int s; 846 847 slp->ns_flag &= ~SLP_ALLFLAGS; 848 fp = slp->ns_fp; 849 if (fp) { 850 slp->ns_fp = (struct file *)0; 851 so = slp->ns_so; 852 so->so_upcall = NULL; 853 soshutdown(so, 2); 854 closef(fp, (struct proc *)0); 855 if (slp->ns_nam) 856 MFREE(slp->ns_nam, m); 857 m_freem(slp->ns_raw); 858 m_freem(slp->ns_rec); 859 for (nuidp = slp->ns_uidlruhead.tqh_first; nuidp != 0; 860 nuidp = nnuidp) { 861 nnuidp = nuidp->nu_lru.tqe_next; 862 LIST_REMOVE(nuidp, nu_hash); 863 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); 864 if (nuidp->nu_flag & NU_NAM) 865 m_freem(nuidp->nu_nam); 866 free((caddr_t)nuidp, M_NFSUID); 867 } 868 s = splsoftclock(); 869 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) { 870 nnwp = nwp->nd_tq.le_next; 871 LIST_REMOVE(nwp, nd_tq); 872 free((caddr_t)nwp, M_NFSRVDESC); 873 } 874 LIST_INIT(&slp->ns_tq); 875 splx(s); 876 } 877 } 878 879 /* 880 * Get an authorization string for the uid by having the mount_nfs sitting 881 * on this mount point porpous out of the kernel and do it. 882 */ 883 int 884 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key) 885 register struct nfsmount *nmp; 886 struct nfsreq *rep; 887 struct ucred *cred; 888 char **auth_str; 889 int *auth_len; 890 char *verf_str; 891 int *verf_len; 892 NFSKERBKEY_T key; /* return session key */ 893 { 894 int error = 0; 895 896 while ((nmp->nm_flag & NFSMNT_WAITAUTH) == 0) { 897 nmp->nm_flag |= NFSMNT_WANTAUTH; 898 (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK, 899 "nfsauth1", 2 * hz); 900 error = nfs_sigintr(nmp, rep, rep->r_procp); 901 if (error) { 902 nmp->nm_flag &= ~NFSMNT_WANTAUTH; 903 return (error); 904 } 905 } 906 nmp->nm_flag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH); 907 nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 908 nmp->nm_authlen = RPCAUTH_MAXSIZ; 909 nmp->nm_verfstr = verf_str; 910 nmp->nm_verflen = *verf_len; 911 nmp->nm_authuid = cred->cr_uid; 912 wakeup((caddr_t)&nmp->nm_authstr); 913 914 /* 915 * And wait for mount_nfs to do its stuff. 916 */ 917 while ((nmp->nm_flag & NFSMNT_HASAUTH) == 0 && error == 0) { 918 (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK, 919 "nfsauth2", 2 * hz); 920 error = nfs_sigintr(nmp, rep, rep->r_procp); 921 } 922 if (nmp->nm_flag & NFSMNT_AUTHERR) { 923 nmp->nm_flag &= ~NFSMNT_AUTHERR; 924 error = EAUTH; 925 } 926 if (error) 927 free((caddr_t)*auth_str, M_TEMP); 928 else { 929 *auth_len = nmp->nm_authlen; 930 *verf_len = nmp->nm_verflen; 931 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key)); 932 } 933 nmp->nm_flag &= ~NFSMNT_HASAUTH; 934 nmp->nm_flag |= NFSMNT_WAITAUTH; 935 if (nmp->nm_flag & NFSMNT_WANTAUTH) { 936 nmp->nm_flag &= ~NFSMNT_WANTAUTH; 937 wakeup((caddr_t)&nmp->nm_authtype); 938 } 939 return (error); 940 } 941 942 /* 943 * Get a nickname authenticator and verifier. 944 */ 945 int 946 nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len) 947 struct nfsmount *nmp; 948 struct ucred *cred; 949 char **auth_str; 950 int *auth_len; 951 char *verf_str; 952 int verf_len; 953 { 954 register struct nfsuid *nuidp; 955 register u_long *nickp, *verfp; 956 struct timeval ktvin, ktvout; 957 958 #ifdef DIAGNOSTIC 959 if (verf_len < (4 * NFSX_UNSIGNED)) 960 panic("nfs_getnickauth verf too small"); 961 #endif 962 for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first; 963 nuidp != 0; nuidp = nuidp->nu_hash.le_next) { 964 if (nuidp->nu_cr.cr_uid == cred->cr_uid) 965 break; 966 } 967 if (!nuidp || nuidp->nu_expire < time.tv_sec) 968 return (EACCES); 969 970 /* 971 * Move to the end of the lru list (end of lru == most recently used). 972 */ 973 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 974 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); 975 976 nickp = (u_long *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); 977 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); 978 *nickp = txdr_unsigned(nuidp->nu_nickname); 979 *auth_str = (char *)nickp; 980 *auth_len = 2 * NFSX_UNSIGNED; 981 982 /* 983 * Now we must encrypt the verifier and package it up. 984 */ 985 verfp = (u_long *)verf_str; 986 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); 987 if (time.tv_sec > nuidp->nu_timestamp.tv_sec || 988 (time.tv_sec == nuidp->nu_timestamp.tv_sec && 989 time.tv_usec > nuidp->nu_timestamp.tv_usec)) 990 nuidp->nu_timestamp = time; 991 else 992 nuidp->nu_timestamp.tv_usec++; 993 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec); 994 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec); 995 996 /* 997 * Now encrypt the timestamp verifier in ecb mode using the session 998 * key. 999 */ 1000 #ifdef NFSKERB 1001 XXX 1002 #endif 1003 1004 *verfp++ = ktvout.tv_sec; 1005 *verfp++ = ktvout.tv_usec; 1006 *verfp = 0; 1007 return (0); 1008 } 1009 1010 /* 1011 * Save the current nickname in a hash list entry on the mount point. 1012 */ 1013 int 1014 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep) 1015 register struct nfsmount *nmp; 1016 struct ucred *cred; 1017 int len; 1018 NFSKERBKEY_T key; 1019 struct mbuf **mdp; 1020 char **dposp; 1021 struct mbuf *mrep; 1022 { 1023 register struct nfsuid *nuidp; 1024 register u_long *tl; 1025 register long t1; 1026 struct mbuf *md = *mdp; 1027 struct timeval ktvin, ktvout; 1028 u_long nick; 1029 char *dpos = *dposp, *cp2; 1030 int deltasec, error = 0; 1031 1032 if (len == (3 * NFSX_UNSIGNED)) { 1033 nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); 1034 ktvin.tv_sec = *tl++; 1035 ktvin.tv_usec = *tl++; 1036 nick = fxdr_unsigned(u_long, *tl); 1037 1038 /* 1039 * Decrypt the timestamp in ecb mode. 1040 */ 1041 #ifdef NFSKERB 1042 XXX 1043 #endif 1044 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec); 1045 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec); 1046 deltasec = time.tv_sec - ktvout.tv_sec; 1047 if (deltasec < 0) 1048 deltasec = -deltasec; 1049 /* 1050 * If ok, add it to the hash list for the mount point. 1051 */ 1052 if (deltasec <= NFS_KERBCLOCKSKEW) { 1053 if (nmp->nm_numuids < nuidhash_max) { 1054 nmp->nm_numuids++; 1055 nuidp = (struct nfsuid *) 1056 malloc(sizeof (struct nfsuid), M_NFSUID, 1057 M_WAITOK); 1058 } else { 1059 nuidp = nmp->nm_uidlruhead.tqh_first; 1060 LIST_REMOVE(nuidp, nu_hash); 1061 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, 1062 nu_lru); 1063 } 1064 nuidp->nu_flag = 0; 1065 nuidp->nu_cr.cr_uid = cred->cr_uid; 1066 nuidp->nu_expire = time.tv_sec + NFS_KERBTTL; 1067 nuidp->nu_timestamp = ktvout; 1068 nuidp->nu_nickname = nick; 1069 bcopy(key, nuidp->nu_key, sizeof (key)); 1070 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, 1071 nu_lru); 1072 LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid), 1073 nuidp, nu_hash); 1074 } 1075 } else 1076 nfsm_adv(nfsm_rndup(len)); 1077 nfsmout: 1078 *mdp = md; 1079 *dposp = dpos; 1080 return (error); 1081 } 1082 1083 #ifndef NFS_NOSERVER 1084 /* 1085 * Derefence a server socket structure. If it has no more references and 1086 * is no longer valid, you can throw it away. 1087 */ 1088 void 1089 nfsrv_slpderef(slp) 1090 register struct nfssvc_sock *slp; 1091 { 1092 if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) { 1093 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 1094 free((caddr_t)slp, M_NFSSVC); 1095 } 1096 } 1097 1098 /* 1099 * Initialize the data structures for the server. 1100 * Handshake with any new nfsds starting up to avoid any chance of 1101 * corruption. 1102 */ 1103 void 1104 nfsrv_init(terminating) 1105 int terminating; 1106 { 1107 register struct nfssvc_sock *slp, *nslp; 1108 1109 if (nfssvc_sockhead_flag & SLP_INIT) 1110 panic("nfsd init"); 1111 nfssvc_sockhead_flag |= SLP_INIT; 1112 if (terminating) { 1113 for (slp = nfssvc_sockhead.tqh_first; slp != 0; slp = nslp) { 1114 nslp = slp->ns_chain.tqe_next; 1115 if (slp->ns_flag & SLP_VALID) 1116 nfsrv_zapsock(slp); 1117 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 1118 free((caddr_t)slp, M_NFSSVC); 1119 } 1120 nfsrv_cleancache(); /* And clear out server cache */ 1121 } 1122 1123 TAILQ_INIT(&nfssvc_sockhead); 1124 nfssvc_sockhead_flag &= ~SLP_INIT; 1125 if (nfssvc_sockhead_flag & SLP_WANTINIT) { 1126 nfssvc_sockhead_flag &= ~SLP_WANTINIT; 1127 wakeup((caddr_t)&nfssvc_sockhead); 1128 } 1129 1130 TAILQ_INIT(&nfsd_head); 1131 nfsd_head_flag &= ~NFSD_CHECKSLP; 1132 1133 nfs_udpsock = (struct nfssvc_sock *) 1134 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 1135 bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock)); 1136 TAILQ_INIT(&nfs_udpsock->ns_uidlruhead); 1137 TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain); 1138 1139 nfs_cltpsock = (struct nfssvc_sock *) 1140 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 1141 bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock)); 1142 TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead); 1143 TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain); 1144 } 1145 1146 /* 1147 * Add entries to the server monitor log. 1148 */ 1149 static void 1150 nfsd_rt(sotype, nd, cacherep) 1151 int sotype; 1152 register struct nfsrv_descript *nd; 1153 int cacherep; 1154 { 1155 register struct drt *rt; 1156 1157 rt = &nfsdrt.drt[nfsdrt.pos]; 1158 if (cacherep == RC_DOIT) 1159 rt->flag = 0; 1160 else if (cacherep == RC_REPLY) 1161 rt->flag = DRT_CACHEREPLY; 1162 else 1163 rt->flag = DRT_CACHEDROP; 1164 if (sotype == SOCK_STREAM) 1165 rt->flag |= DRT_TCP; 1166 if (nd->nd_flag & ND_NQNFS) 1167 rt->flag |= DRT_NQNFS; 1168 else if (nd->nd_flag & ND_NFSV3) 1169 rt->flag |= DRT_NFSV3; 1170 rt->proc = nd->nd_procnum; 1171 if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET) 1172 rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr; 1173 else 1174 rt->ipadr = INADDR_ANY; 1175 rt->resptime = ((time.tv_sec - nd->nd_starttime.tv_sec) * 1000000) + 1176 (time.tv_usec - nd->nd_starttime.tv_usec); 1177 rt->tstamp = time; 1178 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 1179 } 1180 #endif /* NFS_NOSERVER */
Cache object: 169835ecfe4741fbb646129693896f56
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