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 * %sccs.include.redist.c% 9 * 10 * @(#)nfs_syscalls.c 8.1 (Berkeley) 06/10/93 11 */ 12 13 #include <sys/param.h> 14 #include <sys/systm.h> 15 #include <sys/kernel.h> 16 #include <sys/file.h> 17 #include <sys/stat.h> 18 #include <sys/vnode.h> 19 #include <sys/mount.h> 20 #include <sys/proc.h> 21 #include <sys/uio.h> 22 #include <sys/malloc.h> 23 #include <sys/buf.h> 24 #include <sys/mbuf.h> 25 #include <sys/socket.h> 26 #include <sys/socketvar.h> 27 #include <sys/domain.h> 28 #include <sys/protosw.h> 29 #include <sys/namei.h> 30 #include <sys/syslog.h> 31 32 #include <netinet/in.h> 33 #include <netinet/tcp.h> 34 #ifdef ISO 35 #include <netiso/iso.h> 36 #endif 37 #include <nfs/rpcv2.h> 38 #include <nfs/nfsv2.h> 39 #include <nfs/nfs.h> 40 #include <nfs/nfsrvcache.h> 41 #include <nfs/nfsmount.h> 42 #include <nfs/nqnfs.h> 43 #include <nfs/nfsrtt.h> 44 45 /* Global defs. */ 46 extern u_long nfs_prog, nfs_vers; 47 extern int (*nfsrv_procs[NFS_NPROCS])(); 48 extern struct queue_entry nfs_bufq; 49 extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 50 extern int nfs_numasync; 51 extern time_t nqnfsstarttime; 52 extern struct nfsrv_req nsrvq_head; 53 extern struct nfsd nfsd_head; 54 extern int nqsrv_writeslack; 55 extern int nfsrtton; 56 struct nfssvc_sock *nfs_udpsock, *nfs_cltpsock; 57 int nuidhash_max = NFS_MAXUIDHASH; 58 static int nfs_numnfsd = 0; 59 int nfsd_waiting = 0; 60 static int notstarted = 1; 61 static int modify_flag = 0; 62 static struct nfsdrt nfsdrt; 63 void nfsrv_cleancache(), nfsrv_rcv(), nfsrv_wakenfsd(), nfs_sndunlock(); 64 static void nfsd_rt(); 65 void nfsrv_slpderef(), nfsrv_init(); 66 67 #define TRUE 1 68 #define FALSE 0 69 70 static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON]; 71 /* 72 * NFS server system calls 73 * getfh() lives here too, but maybe should move to kern/vfs_syscalls.c 74 */ 75 76 /* 77 * Get file handle system call 78 */ 79 struct getfh_args { 80 char *fname; 81 fhandle_t *fhp; 82 }; 83 getfh(p, uap, retval) 84 struct proc *p; 85 register struct getfh_args *uap; 86 int *retval; 87 { 88 register struct vnode *vp; 89 fhandle_t fh; 90 int error; 91 struct nameidata nd; 92 93 /* 94 * Must be super user 95 */ 96 if (error = suser(p->p_ucred, &p->p_acflag)) 97 return (error); 98 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, p); 99 if (error = namei(&nd)) 100 return (error); 101 vp = nd.ni_vp; 102 bzero((caddr_t)&fh, sizeof(fh)); 103 fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid; 104 error = VFS_VPTOFH(vp, &fh.fh_fid); 105 vput(vp); 106 if (error) 107 return (error); 108 error = copyout((caddr_t)&fh, (caddr_t)uap->fhp, sizeof (fh)); 109 return (error); 110 } 111 112 static struct nfssvc_sock nfssvc_sockhead; 113 114 /* 115 * Nfs server psuedo system call for the nfsd's 116 * Based on the flag value it either: 117 * - adds a socket to the selection list 118 * - remains in the kernel as an nfsd 119 * - remains in the kernel as an nfsiod 120 */ 121 struct nfssvc_args { 122 int flag; 123 caddr_t argp; 124 }; 125 nfssvc(p, uap, retval) 126 struct proc *p; 127 register struct nfssvc_args *uap; 128 int *retval; 129 { 130 struct nameidata nd; 131 struct file *fp; 132 struct mbuf *nam; 133 struct nfsd_args nfsdarg; 134 struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs; 135 struct nfsd_cargs ncd; 136 struct nfsd *nfsd; 137 struct nfssvc_sock *slp; 138 struct nfsuid *nuidp, **nuh; 139 struct nfsmount *nmp; 140 int error; 141 142 /* 143 * Must be super user 144 */ 145 if (error = suser(p->p_ucred, &p->p_acflag)) 146 return (error); 147 while (nfssvc_sockhead.ns_flag & SLP_INIT) { 148 nfssvc_sockhead.ns_flag |= SLP_WANTINIT; 149 (void) tsleep((caddr_t)&nfssvc_sockhead, PSOCK, "nfsd init", 0); 150 } 151 if (uap->flag & NFSSVC_BIOD) 152 error = nfssvc_iod(p); 153 else if (uap->flag & NFSSVC_MNTD) { 154 if (error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd))) 155 return (error); 156 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 157 ncd.ncd_dirp, p); 158 if (error = namei(&nd)) 159 return (error); 160 if ((nd.ni_vp->v_flag & VROOT) == 0) 161 error = EINVAL; 162 nmp = VFSTONFS(nd.ni_vp->v_mount); 163 vput(nd.ni_vp); 164 if (error) 165 return (error); 166 if ((nmp->nm_flag & NFSMNT_MNTD) && 167 (uap->flag & NFSSVC_GOTAUTH) == 0) 168 return (0); 169 nmp->nm_flag |= NFSMNT_MNTD; 170 error = nqnfs_clientd(nmp, p->p_ucred, &ncd, uap->flag, 171 uap->argp, p); 172 } else if (uap->flag & NFSSVC_ADDSOCK) { 173 if (error = copyin(uap->argp, (caddr_t)&nfsdarg, 174 sizeof(nfsdarg))) 175 return (error); 176 if (error = getsock(p->p_fd, nfsdarg.sock, &fp)) 177 return (error); 178 /* 179 * Get the client address for connected sockets. 180 */ 181 if (nfsdarg.name == NULL || nfsdarg.namelen == 0) 182 nam = (struct mbuf *)0; 183 else if (error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen, 184 MT_SONAME)) 185 return (error); 186 error = nfssvc_addsock(fp, nam); 187 } else { 188 if (error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd))) 189 return (error); 190 if ((uap->flag & NFSSVC_AUTHIN) && (nfsd = nsd->nsd_nfsd) && 191 (nfsd->nd_slp->ns_flag & SLP_VALID)) { 192 slp = nfsd->nd_slp; 193 194 /* 195 * First check to see if another nfsd has already 196 * added this credential. 197 */ 198 nuidp = slp->ns_uidh[NUIDHASH(nsd->nsd_uid)]; 199 while (nuidp) { 200 if (nuidp->nu_uid == nsd->nsd_uid) 201 break; 202 nuidp = nuidp->nu_hnext; 203 } 204 if (!nuidp) { 205 /* 206 * Nope, so we will. 207 */ 208 if (slp->ns_numuids < nuidhash_max) { 209 slp->ns_numuids++; 210 nuidp = (struct nfsuid *) 211 malloc(sizeof (struct nfsuid), M_NFSUID, 212 M_WAITOK); 213 } else 214 nuidp = (struct nfsuid *)0; 215 if ((slp->ns_flag & SLP_VALID) == 0) { 216 if (nuidp) 217 free((caddr_t)nuidp, M_NFSUID); 218 } else { 219 if (nuidp == (struct nfsuid *)0) { 220 nuidp = slp->ns_lruprev; 221 remque(nuidp); 222 if (nuidp->nu_hprev) 223 nuidp->nu_hprev->nu_hnext = 224 nuidp->nu_hnext; 225 if (nuidp->nu_hnext) 226 nuidp->nu_hnext->nu_hprev = 227 nuidp->nu_hprev; 228 } 229 nuidp->nu_cr = nsd->nsd_cr; 230 if (nuidp->nu_cr.cr_ngroups > NGROUPS) 231 nuidp->nu_cr.cr_ngroups = NGROUPS; 232 nuidp->nu_cr.cr_ref = 1; 233 nuidp->nu_uid = nsd->nsd_uid; 234 insque(nuidp, (struct nfsuid *)slp); 235 nuh = &slp->ns_uidh[NUIDHASH(nsd->nsd_uid)]; 236 if (nuidp->nu_hnext = *nuh) 237 nuidp->nu_hnext->nu_hprev = nuidp; 238 nuidp->nu_hprev = (struct nfsuid *)0; 239 *nuh = nuidp; 240 } 241 } 242 } 243 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd)) 244 nfsd->nd_flag |= NFSD_AUTHFAIL; 245 error = nfssvc_nfsd(nsd, uap->argp, p); 246 } 247 if (error == EINTR || error == ERESTART) 248 error = 0; 249 return (error); 250 } 251 252 /* 253 * Adds a socket to the list for servicing by nfsds. 254 */ 255 nfssvc_addsock(fp, mynam) 256 struct file *fp; 257 struct mbuf *mynam; 258 { 259 register struct mbuf *m; 260 register int siz; 261 register struct nfssvc_sock *slp; 262 register struct socket *so; 263 struct nfssvc_sock *tslp; 264 int error, s; 265 266 so = (struct socket *)fp->f_data; 267 tslp = (struct nfssvc_sock *)0; 268 /* 269 * Add it to the list, as required. 270 */ 271 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 272 tslp = nfs_udpsock; 273 if (tslp->ns_flag & SLP_VALID) { 274 m_freem(mynam); 275 return (EPERM); 276 } 277 #ifdef ISO 278 } else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) { 279 tslp = nfs_cltpsock; 280 if (tslp->ns_flag & SLP_VALID) { 281 m_freem(mynam); 282 return (EPERM); 283 } 284 #endif /* ISO */ 285 } 286 if (so->so_type == SOCK_STREAM) 287 siz = NFS_MAXPACKET + sizeof (u_long); 288 else 289 siz = NFS_MAXPACKET; 290 if (error = soreserve(so, siz, siz)) { 291 m_freem(mynam); 292 return (error); 293 } 294 295 /* 296 * Set protocol specific options { for now TCP only } and 297 * reserve some space. For datagram sockets, this can get called 298 * repeatedly for the same socket, but that isn't harmful. 299 */ 300 if (so->so_type == SOCK_STREAM) { 301 MGET(m, M_WAIT, MT_SOOPTS); 302 *mtod(m, int *) = 1; 303 m->m_len = sizeof(int); 304 sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m); 305 } 306 if (so->so_proto->pr_domain->dom_family == AF_INET && 307 so->so_proto->pr_protocol == IPPROTO_TCP) { 308 MGET(m, M_WAIT, MT_SOOPTS); 309 *mtod(m, int *) = 1; 310 m->m_len = sizeof(int); 311 sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m); 312 } 313 so->so_rcv.sb_flags &= ~SB_NOINTR; 314 so->so_rcv.sb_timeo = 0; 315 so->so_snd.sb_flags &= ~SB_NOINTR; 316 so->so_snd.sb_timeo = 0; 317 if (tslp) 318 slp = tslp; 319 else { 320 slp = (struct nfssvc_sock *) 321 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 322 bzero((caddr_t)slp, sizeof (struct nfssvc_sock)); 323 slp->ns_prev = nfssvc_sockhead.ns_prev; 324 slp->ns_prev->ns_next = slp; 325 slp->ns_next = &nfssvc_sockhead; 326 nfssvc_sockhead.ns_prev = slp; 327 slp->ns_lrunext = slp->ns_lruprev = (struct nfsuid *)slp; 328 } 329 slp->ns_so = so; 330 slp->ns_nam = mynam; 331 fp->f_count++; 332 slp->ns_fp = fp; 333 s = splnet(); 334 so->so_upcallarg = (caddr_t)slp; 335 so->so_upcall = nfsrv_rcv; 336 slp->ns_flag = (SLP_VALID | SLP_NEEDQ); 337 nfsrv_wakenfsd(slp); 338 splx(s); 339 return (0); 340 } 341 342 /* 343 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 344 * until it is killed by a signal. 345 */ 346 nfssvc_nfsd(nsd, argp, p) 347 struct nfsd_srvargs *nsd; 348 caddr_t argp; 349 struct proc *p; 350 { 351 register struct mbuf *m, *nam2; 352 register int siz; 353 register struct nfssvc_sock *slp; 354 register struct socket *so; 355 register int *solockp; 356 struct nfssvc_sock *oslp; 357 struct nfsd *nd = nsd->nsd_nfsd; 358 struct mbuf *mreq, *nam; 359 struct timeval starttime; 360 struct nfsuid *uidp; 361 int error, cacherep, s; 362 int sotype; 363 364 s = splnet(); 365 if (nd == (struct nfsd *)0) { 366 nsd->nsd_nfsd = nd = (struct nfsd *) 367 malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK); 368 bzero((caddr_t)nd, sizeof (struct nfsd)); 369 nd->nd_procp = p; 370 nd->nd_cr.cr_ref = 1; 371 insque(nd, &nfsd_head); 372 nd->nd_nqlflag = NQL_NOVAL; 373 nfs_numnfsd++; 374 } 375 /* 376 * Loop getting rpc requests until SIGKILL. 377 */ 378 for (;;) { 379 if ((nd->nd_flag & NFSD_REQINPROG) == 0) { 380 while (nd->nd_slp == (struct nfssvc_sock *)0 && 381 (nfsd_head.nd_flag & NFSD_CHECKSLP) == 0) { 382 nd->nd_flag |= NFSD_WAITING; 383 nfsd_waiting++; 384 error = tsleep((caddr_t)nd, PSOCK | PCATCH, "nfsd", 0); 385 nfsd_waiting--; 386 if (error) 387 goto done; 388 } 389 if (nd->nd_slp == (struct nfssvc_sock *)0 && 390 (nfsd_head.nd_flag & NFSD_CHECKSLP)) { 391 slp = nfssvc_sockhead.ns_next; 392 while (slp != &nfssvc_sockhead) { 393 if ((slp->ns_flag & (SLP_VALID | SLP_DOREC)) 394 == (SLP_VALID | SLP_DOREC)) { 395 slp->ns_flag &= ~SLP_DOREC; 396 slp->ns_sref++; 397 nd->nd_slp = slp; 398 break; 399 } 400 slp = slp->ns_next; 401 } 402 if (slp == &nfssvc_sockhead) 403 nfsd_head.nd_flag &= ~NFSD_CHECKSLP; 404 } 405 if ((slp = nd->nd_slp) == (struct nfssvc_sock *)0) 406 continue; 407 if (slp->ns_flag & SLP_VALID) { 408 if (slp->ns_flag & SLP_DISCONN) 409 nfsrv_zapsock(slp); 410 else if (slp->ns_flag & SLP_NEEDQ) { 411 slp->ns_flag &= ~SLP_NEEDQ; 412 (void) nfs_sndlock(&slp->ns_solock, 413 (struct nfsreq *)0); 414 nfsrv_rcv(slp->ns_so, (caddr_t)slp, 415 M_WAIT); 416 nfs_sndunlock(&slp->ns_solock); 417 } 418 error = nfsrv_dorec(slp, nd); 419 nd->nd_flag |= NFSD_REQINPROG; 420 } 421 } else { 422 error = 0; 423 slp = nd->nd_slp; 424 } 425 if (error || (slp->ns_flag & SLP_VALID) == 0) { 426 nd->nd_slp = (struct nfssvc_sock *)0; 427 nd->nd_flag &= ~NFSD_REQINPROG; 428 nfsrv_slpderef(slp); 429 continue; 430 } 431 splx(s); 432 so = slp->ns_so; 433 sotype = so->so_type; 434 starttime = time; 435 if (so->so_proto->pr_flags & PR_CONNREQUIRED) 436 solockp = &slp->ns_solock; 437 else 438 solockp = (int *)0; 439 /* 440 * nam == nam2 for connectionless protocols such as UDP 441 * nam2 == NULL for connection based protocols to disable 442 * recent request caching. 443 */ 444 if (nam2 = nd->nd_nam) { 445 nam = nam2; 446 cacherep = RC_CHECKIT; 447 } else { 448 nam = slp->ns_nam; 449 cacherep = RC_DOIT; 450 } 451 452 /* 453 * Check to see if authorization is needed. 454 */ 455 if (nd->nd_flag & NFSD_NEEDAUTH) { 456 static int logauth = 0; 457 458 nd->nd_flag &= ~NFSD_NEEDAUTH; 459 /* 460 * Check for a mapping already installed. 461 */ 462 uidp = slp->ns_uidh[NUIDHASH(nd->nd_cr.cr_uid)]; 463 while (uidp) { 464 if (uidp->nu_uid == nd->nd_cr.cr_uid) 465 break; 466 uidp = uidp->nu_hnext; 467 } 468 if (!uidp) { 469 nsd->nsd_uid = nd->nd_cr.cr_uid; 470 if (nam2 && logauth++ == 0) 471 log(LOG_WARNING, "Kerberized NFS using UDP\n"); 472 nsd->nsd_haddr = 473 mtod(nam, struct sockaddr_in *)->sin_addr.s_addr; 474 nsd->nsd_authlen = nd->nd_authlen; 475 if (copyout(nd->nd_authstr, nsd->nsd_authstr, 476 nd->nd_authlen) == 0 && 477 copyout((caddr_t)nsd, argp, sizeof (*nsd)) == 0) 478 return (ENEEDAUTH); 479 cacherep = RC_DROPIT; 480 } 481 } 482 if (cacherep == RC_CHECKIT) 483 cacherep = nfsrv_getcache(nam2, nd, &mreq); 484 485 /* 486 * Check for just starting up for NQNFS and send 487 * fake "try again later" replies to the NQNFS clients. 488 */ 489 if (notstarted && nqnfsstarttime <= time.tv_sec) { 490 if (modify_flag) { 491 nqnfsstarttime = time.tv_sec + nqsrv_writeslack; 492 modify_flag = 0; 493 } else 494 notstarted = 0; 495 } 496 if (notstarted) { 497 if (nd->nd_nqlflag == NQL_NOVAL) 498 cacherep = RC_DROPIT; 499 else if (nd->nd_procnum != NFSPROC_WRITE) { 500 nd->nd_procnum = NFSPROC_NOOP; 501 nd->nd_repstat = NQNFS_TRYLATER; 502 cacherep = RC_DOIT; 503 } else 504 modify_flag = 1; 505 } else if (nd->nd_flag & NFSD_AUTHFAIL) { 506 nd->nd_flag &= ~NFSD_AUTHFAIL; 507 nd->nd_procnum = NFSPROC_NOOP; 508 nd->nd_repstat = NQNFS_AUTHERR; 509 cacherep = RC_DOIT; 510 } 511 512 switch (cacherep) { 513 case RC_DOIT: 514 error = (*(nfsrv_procs[nd->nd_procnum]))(nd, 515 nd->nd_mrep, nd->nd_md, nd->nd_dpos, &nd->nd_cr, 516 nam, &mreq); 517 if (nd->nd_cr.cr_ref != 1) { 518 printf("nfssvc cref=%d\n", nd->nd_cr.cr_ref); 519 panic("nfssvc cref"); 520 } 521 if (error) { 522 if (nd->nd_procnum != NQNFSPROC_VACATED) 523 nfsstats.srv_errs++; 524 if (nam2) { 525 nfsrv_updatecache(nam2, nd, FALSE, mreq); 526 m_freem(nam2); 527 } 528 break; 529 } 530 nfsstats.srvrpccnt[nd->nd_procnum]++; 531 if (nam2) 532 nfsrv_updatecache(nam2, nd, TRUE, mreq); 533 nd->nd_mrep = (struct mbuf *)0; 534 case RC_REPLY: 535 m = mreq; 536 siz = 0; 537 while (m) { 538 siz += m->m_len; 539 m = m->m_next; 540 } 541 if (siz <= 0 || siz > NFS_MAXPACKET) { 542 printf("mbuf siz=%d\n",siz); 543 panic("Bad nfs svc reply"); 544 } 545 m = mreq; 546 m->m_pkthdr.len = siz; 547 m->m_pkthdr.rcvif = (struct ifnet *)0; 548 /* 549 * For stream protocols, prepend a Sun RPC 550 * Record Mark. 551 */ 552 if (sotype == SOCK_STREAM) { 553 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 554 *mtod(m, u_long *) = htonl(0x80000000 | siz); 555 } 556 if (solockp) 557 (void) nfs_sndlock(solockp, (struct nfsreq *)0); 558 if (slp->ns_flag & SLP_VALID) 559 error = nfs_send(so, nam2, m, (struct nfsreq *)0); 560 else { 561 error = EPIPE; 562 m_freem(m); 563 } 564 if (nfsrtton) 565 nfsd_rt(&starttime, sotype, nd, nam, cacherep); 566 if (nam2) 567 MFREE(nam2, m); 568 if (nd->nd_mrep) 569 m_freem(nd->nd_mrep); 570 if (error == EPIPE) 571 nfsrv_zapsock(slp); 572 if (solockp) 573 nfs_sndunlock(solockp); 574 if (error == EINTR || error == ERESTART) { 575 nfsrv_slpderef(slp); 576 s = splnet(); 577 goto done; 578 } 579 break; 580 case RC_DROPIT: 581 if (nfsrtton) 582 nfsd_rt(&starttime, sotype, nd, nam, cacherep); 583 m_freem(nd->nd_mrep); 584 m_freem(nam2); 585 break; 586 }; 587 s = splnet(); 588 if (nfsrv_dorec(slp, nd)) { 589 nd->nd_flag &= ~NFSD_REQINPROG; 590 nd->nd_slp = (struct nfssvc_sock *)0; 591 nfsrv_slpderef(slp); 592 } 593 } 594 done: 595 remque(nd); 596 splx(s); 597 free((caddr_t)nd, M_NFSD); 598 nsd->nsd_nfsd = (struct nfsd *)0; 599 if (--nfs_numnfsd == 0) 600 nfsrv_init(TRUE); /* Reinitialize everything */ 601 return (error); 602 } 603 604 /* 605 * Asynchronous I/O daemons for client nfs. 606 * They do read-ahead and write-behind operations on the block I/O cache. 607 * Never returns unless it fails or gets killed. 608 */ 609 nfssvc_iod(p) 610 struct proc *p; 611 { 612 register struct buf *bp, *dp; 613 register int i, myiod; 614 int error = 0; 615 616 /* 617 * Assign my position or return error if too many already running 618 */ 619 myiod = -1; 620 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 621 if (nfs_asyncdaemon[i] == 0) { 622 nfs_asyncdaemon[i]++; 623 myiod = i; 624 break; 625 } 626 if (myiod == -1) 627 return (EBUSY); 628 nfs_numasync++; 629 /* 630 * Just loop around doin our stuff until SIGKILL 631 */ 632 for (;;) { 633 while (nfs_bufq.qe_next == NULL && error == 0) { 634 nfs_iodwant[myiod] = p; 635 error = tsleep((caddr_t)&nfs_iodwant[myiod], 636 PWAIT | PCATCH, "nfsidl", 0); 637 } 638 while ((bp = nfs_bufq.qe_next) != NULL) { 639 /* Take one off the front of the list */ 640 queue_remove(&nfs_bufq, bp, struct buf *, b_freelist); 641 if (bp->b_flags & B_READ) 642 (void) nfs_doio(bp, bp->b_rcred, (struct proc *)0); 643 else 644 (void) nfs_doio(bp, bp->b_wcred, (struct proc *)0); 645 } 646 if (error) { 647 nfs_asyncdaemon[myiod] = 0; 648 nfs_numasync--; 649 return (error); 650 } 651 } 652 } 653 654 /* 655 * Shut down a socket associated with an nfssvc_sock structure. 656 * Should be called with the send lock set, if required. 657 * The trick here is to increment the sref at the start, so that the nfsds 658 * will stop using it and clear ns_flag at the end so that it will not be 659 * reassigned during cleanup. 660 */ 661 nfsrv_zapsock(slp) 662 register struct nfssvc_sock *slp; 663 { 664 register struct nfsuid *nuidp, *onuidp; 665 register int i; 666 struct socket *so; 667 struct file *fp; 668 struct mbuf *m; 669 670 slp->ns_flag &= ~SLP_ALLFLAGS; 671 if (fp = slp->ns_fp) { 672 slp->ns_fp = (struct file *)0; 673 so = slp->ns_so; 674 so->so_upcall = NULL; 675 soshutdown(so, 2); 676 closef(fp, (struct proc *)0); 677 if (slp->ns_nam) 678 MFREE(slp->ns_nam, m); 679 m_freem(slp->ns_raw); 680 m_freem(slp->ns_rec); 681 nuidp = slp->ns_lrunext; 682 while (nuidp != (struct nfsuid *)slp) { 683 onuidp = nuidp; 684 nuidp = nuidp->nu_lrunext; 685 free((caddr_t)onuidp, M_NFSUID); 686 } 687 slp->ns_lrunext = slp->ns_lruprev = (struct nfsuid *)slp; 688 for (i = 0; i < NUIDHASHSIZ; i++) 689 slp->ns_uidh[i] = (struct nfsuid *)0; 690 } 691 } 692 693 /* 694 * Get an authorization string for the uid by having the mount_nfs sitting 695 * on this mount point porpous out of the kernel and do it. 696 */ 697 nfs_getauth(nmp, rep, cred, auth_type, auth_str, auth_len) 698 register struct nfsmount *nmp; 699 struct nfsreq *rep; 700 struct ucred *cred; 701 int *auth_type; 702 char **auth_str; 703 int *auth_len; 704 { 705 int error = 0; 706 707 while ((nmp->nm_flag & NFSMNT_WAITAUTH) == 0) { 708 nmp->nm_flag |= NFSMNT_WANTAUTH; 709 (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK, 710 "nfsauth1", 2 * hz); 711 if (error = nfs_sigintr(nmp, rep, rep->r_procp)) { 712 nmp->nm_flag &= ~NFSMNT_WANTAUTH; 713 return (error); 714 } 715 } 716 nmp->nm_flag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH); 717 nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 718 nmp->nm_authuid = cred->cr_uid; 719 wakeup((caddr_t)&nmp->nm_authstr); 720 721 /* 722 * And wait for mount_nfs to do its stuff. 723 */ 724 while ((nmp->nm_flag & NFSMNT_HASAUTH) == 0 && error == 0) { 725 (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK, 726 "nfsauth2", 2 * hz); 727 error = nfs_sigintr(nmp, rep, rep->r_procp); 728 } 729 if (nmp->nm_flag & NFSMNT_AUTHERR) { 730 nmp->nm_flag &= ~NFSMNT_AUTHERR; 731 error = EAUTH; 732 } 733 if (error) 734 free((caddr_t)*auth_str, M_TEMP); 735 else { 736 *auth_type = nmp->nm_authtype; 737 *auth_len = nmp->nm_authlen; 738 } 739 nmp->nm_flag &= ~NFSMNT_HASAUTH; 740 nmp->nm_flag |= NFSMNT_WAITAUTH; 741 if (nmp->nm_flag & NFSMNT_WANTAUTH) { 742 nmp->nm_flag &= ~NFSMNT_WANTAUTH; 743 wakeup((caddr_t)&nmp->nm_authtype); 744 } 745 return (error); 746 } 747 748 /* 749 * Derefence a server socket structure. If it has no more references and 750 * is no longer valid, you can throw it away. 751 */ 752 void 753 nfsrv_slpderef(slp) 754 register struct nfssvc_sock *slp; 755 { 756 if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) { 757 slp->ns_prev->ns_next = slp->ns_next; 758 slp->ns_next->ns_prev = slp->ns_prev; 759 free((caddr_t)slp, M_NFSSVC); 760 } 761 } 762 763 /* 764 * Initialize the data structures for the server. 765 * Handshake with any new nfsds starting up to avoid any chance of 766 * corruption. 767 */ 768 void 769 nfsrv_init(terminating) 770 int terminating; 771 { 772 register struct nfssvc_sock *slp; 773 struct nfssvc_sock *oslp; 774 775 if (nfssvc_sockhead.ns_flag & SLP_INIT) 776 panic("nfsd init"); 777 nfssvc_sockhead.ns_flag |= SLP_INIT; 778 if (terminating) { 779 slp = nfssvc_sockhead.ns_next; 780 while (slp != &nfssvc_sockhead) { 781 if (slp->ns_flag & SLP_VALID) 782 nfsrv_zapsock(slp); 783 slp->ns_next->ns_prev = slp->ns_prev; 784 slp->ns_prev->ns_next = slp->ns_next; 785 oslp = slp; 786 slp = slp->ns_next; 787 free((caddr_t)oslp, M_NFSSVC); 788 } 789 nfsrv_cleancache(); /* And clear out server cache */ 790 } 791 nfs_udpsock = (struct nfssvc_sock *) 792 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 793 bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock)); 794 nfs_cltpsock = (struct nfssvc_sock *) 795 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 796 bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock)); 797 nfssvc_sockhead.ns_next = nfs_udpsock; 798 nfs_udpsock->ns_next = nfs_cltpsock; 799 nfs_cltpsock->ns_next = &nfssvc_sockhead; 800 nfssvc_sockhead.ns_prev = nfs_cltpsock; 801 nfs_cltpsock->ns_prev = nfs_udpsock; 802 nfs_udpsock->ns_prev = &nfssvc_sockhead; 803 nfs_udpsock->ns_lrunext = nfs_udpsock->ns_lruprev = 804 (struct nfsuid *)nfs_udpsock; 805 nfs_cltpsock->ns_lrunext = nfs_cltpsock->ns_lruprev = 806 (struct nfsuid *)nfs_cltpsock; 807 nfsd_head.nd_next = nfsd_head.nd_prev = &nfsd_head; 808 nfsd_head.nd_flag = 0; 809 nfssvc_sockhead.ns_flag &= ~SLP_INIT; 810 if (nfssvc_sockhead.ns_flag & SLP_WANTINIT) { 811 nfssvc_sockhead.ns_flag &= ~SLP_WANTINIT; 812 wakeup((caddr_t)&nfssvc_sockhead); 813 } 814 } 815 816 /* 817 * Add entries to the server monitor log. 818 */ 819 static void 820 nfsd_rt(startp, sotype, nd, nam, cacherep) 821 struct timeval *startp; 822 int sotype; 823 register struct nfsd *nd; 824 struct mbuf *nam; 825 int cacherep; 826 { 827 register struct drt *rt; 828 829 rt = &nfsdrt.drt[nfsdrt.pos]; 830 if (cacherep == RC_DOIT) 831 rt->flag = 0; 832 else if (cacherep == RC_REPLY) 833 rt->flag = DRT_CACHEREPLY; 834 else 835 rt->flag = DRT_CACHEDROP; 836 if (sotype == SOCK_STREAM) 837 rt->flag |= DRT_TCP; 838 if (nd->nd_nqlflag != NQL_NOVAL) 839 rt->flag |= DRT_NQNFS; 840 rt->proc = nd->nd_procnum; 841 if (mtod(nam, struct sockaddr *)->sa_family == AF_INET) 842 rt->ipadr = mtod(nam, struct sockaddr_in *)->sin_addr.s_addr; 843 else 844 rt->ipadr = INADDR_ANY; 845 rt->resptime = ((time.tv_sec - startp->tv_sec) * 1000000) + 846 (time.tv_usec - startp->tv_usec); 847 rt->tstamp = time; 848 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 849 } 850