1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * 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 7.28 (Berkeley) 02/04/92 11 */ 12 13 #include "param.h" 14 #include "systm.h" 15 #include "kernel.h" 16 #include "file.h" 17 #include "stat.h" 18 #include "vnode.h" 19 #include "mount.h" 20 #include "proc.h" 21 #include "uio.h" 22 #include "malloc.h" 23 #include "buf.h" 24 #include "mbuf.h" 25 #include "socket.h" 26 #include "socketvar.h" 27 #include "domain.h" 28 #include "protosw.h" 29 #include "namei.h" 30 #include "netinet/in.h" 31 #include "netinet/tcp.h" 32 #ifdef ISO 33 #include "netiso/iso.h" 34 #endif 35 #include "machine/endian.h" 36 #include "rpcv2.h" 37 #include "nfsv2.h" 38 #include "nfs.h" 39 #include "nfsrvcache.h" 40 #include "nfsmount.h" 41 #include "nqnfs.h" 42 43 /* Global defs. */ 44 extern u_long nfs_prog, nfs_vers; 45 extern int (*nfsrv_procs[NFS_NPROCS])(); 46 extern struct buf nfs_bqueue; 47 extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 48 extern int nfs_numasync; 49 extern time_t nqnfsstarttime; 50 extern struct nfsrv_req nsrvq_head; 51 extern struct nfsd nfsd_head; 52 extern int nqsrv_writeslack; 53 struct nfssvc_sock *nfs_udpsock, *nfs_cltpsock; 54 int nuidhash_max = NFS_MAXUIDHASH; 55 static int nfs_numnfsd = 0; 56 int nfsd_waiting = 0; 57 static int notstarted = 1; 58 static int modify_flag = 0; 59 void nfsrv_cleancache(), nfsrv_rcv(), nfsrv_wakenfsd(), nfs_sndunlock(); 60 61 #define TRUE 1 62 #define FALSE 0 63 64 static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON]; 65 /* 66 * NFS server system calls 67 * getfh() lives here too, but maybe should move to kern/vfs_syscalls.c 68 */ 69 70 /* 71 * Get file handle system call 72 */ 73 getfh(p, uap, retval) 74 struct proc *p; 75 register struct args { 76 char *fname; 77 fhandle_t *fhp; 78 } *uap; 79 int *retval; 80 { 81 register struct vnode *vp; 82 fhandle_t fh; 83 int error; 84 struct nameidata nd; 85 86 /* 87 * Must be super user 88 */ 89 if (error = suser(p->p_ucred, &p->p_acflag)) 90 return (error); 91 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, p); 92 if (error = namei(&nd)) 93 return (error); 94 vp = nd.ni_vp; 95 bzero((caddr_t)&fh, sizeof(fh)); 96 fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid; 97 error = VFS_VPTOFH(vp, &fh.fh_fid); 98 vput(vp); 99 if (error) 100 return (error); 101 error = copyout((caddr_t)&fh, (caddr_t)uap->fhp, sizeof (fh)); 102 return (error); 103 } 104 105 static struct nfssvc_sock nfssvc_sockhead; 106 107 /* 108 * Nfs server psuedo system call for the nfsd's 109 * Based on the flag value it either: 110 * - adds a socket to the selection list 111 * - remains in the kernel as an nfsd 112 * - remains in the kernel as an nfsiod 113 */ 114 nfssvc(p, uap, retval) 115 struct proc *p; 116 register struct args { 117 int flag; 118 caddr_t argp; 119 } *uap; 120 int *retval; 121 { 122 struct nameidata nd; 123 struct file *fp; 124 struct mbuf *nam; 125 struct nfsd_args nfsdarg; 126 struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs; 127 struct nfsd_cargs ncd; 128 struct nfsd *nfsd; 129 struct nfssvc_sock *slp; 130 struct nfsuid *nuidp, **nuh; 131 struct nfsmount *nmp; 132 int error; 133 134 /* 135 * Must be super user 136 */ 137 if (error = suser(p->p_ucred, &p->p_acflag)) 138 return (error); 139 if (nfssvc_sockhead.ns_next == NULL) { 140 nfs_udpsock = (struct nfssvc_sock *) 141 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 142 bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock)); 143 nfs_cltpsock = (struct nfssvc_sock *) 144 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 145 bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock)); 146 nfssvc_sockhead.ns_next = nfs_udpsock; 147 nfs_udpsock->ns_next = nfs_cltpsock; 148 nfs_cltpsock->ns_next = &nfssvc_sockhead; 149 nfssvc_sockhead.ns_prev = nfs_cltpsock; 150 nfs_cltpsock->ns_prev = nfs_udpsock; 151 nfs_udpsock->ns_prev = &nfssvc_sockhead; 152 nfs_udpsock->ns_lrunext = nfs_udpsock->ns_lruprev = 153 (struct nfsuid *)nfs_udpsock; 154 nfs_cltpsock->ns_lrunext = nfs_cltpsock->ns_lruprev = 155 (struct nfsuid *)nfs_cltpsock; 156 nfsd_head.nd_next = nfsd_head.nd_prev = &nfsd_head; 157 nfsd_head.nd_flag = 0; 158 } 159 if (uap->flag & NFSSVC_BIOD) 160 error = nfssvc_iod(p); 161 else if (uap->flag & NFSSVC_MNTD) { 162 if (error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd))) 163 return (error); 164 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 165 ncd.ncd_dirp, p); 166 if (error = namei(&nd)) 167 return (error); 168 if ((nd.ni_vp->v_flag & VROOT) == 0) 169 error = EINVAL; 170 nmp = VFSTONFS(nd.ni_vp->v_mount); 171 vput(nd.ni_vp); 172 if (error) 173 return (error); 174 else if (nmp->nm_flag & NFSMNT_MNTD) 175 return (0); 176 nmp->nm_flag |= NFSMNT_MNTD; 177 error = nqnfs_clientd(nmp, p->p_ucred, &ncd, uap->flag, 178 uap->argp, p); 179 } else if (uap->flag & NFSSVC_ADDSOCK) { 180 if (error = copyin(uap->argp, (caddr_t)&nfsdarg, 181 sizeof(nfsdarg))) 182 return (error); 183 if (error = getsock(p->p_fd, nfsdarg.sock, &fp)) 184 return (error); 185 /* 186 * Get the client address for connected sockets. 187 */ 188 if (nfsdarg.name == NULL || nfsdarg.namelen == 0) 189 nam = (struct mbuf *)0; 190 else if (error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen, 191 MT_SONAME)) 192 return (error); 193 error = nfssvc_addsock(fp, nam); 194 } else { 195 if (error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd))) 196 return (error); 197 if ((uap->flag & NFSSVC_AUTHIN) && (nfsd = nsd->nsd_nfsd) && 198 nfsd->nd_sref == nfsd->nd_slp->ns_sref) { 199 slp = nfsd->nd_slp; 200 if (slp->ns_numuids < nuidhash_max) { 201 slp->ns_numuids++; 202 nuidp = (struct nfsuid *) 203 malloc(sizeof (struct nfsuid), M_NFSUID, M_WAITOK); 204 } else 205 nuidp = (struct nfsuid *)0; 206 if (slp->ns_sref != nfsd->nd_sref) { 207 if (nuidp) 208 free((caddr_t)nuidp, M_NFSUID); 209 } else { 210 if (nuidp == (struct nfsuid *)0) { 211 nuidp = slp->ns_lruprev; 212 remque(nuidp); 213 if (nuidp->nu_hprev) 214 nuidp->nu_hprev->nu_hnext = nuidp->nu_hnext; 215 if (nuidp->nu_hnext) 216 nuidp->nu_hnext->nu_hprev = nuidp->nu_hprev; 217 } 218 nuidp->nu_cr = nsd->nsd_cr; 219 nuidp->nu_cr.cr_ref = 1; 220 nuidp->nu_uid = nsd->nsd_uid; 221 insque(nuidp, (struct nfsuid *)slp); 222 nuh = &slp->ns_uidh[NUIDHASH(nsd->nsd_uid)]; 223 if (nuidp->nu_hnext = *nuh) 224 nuidp->nu_hnext->nu_hprev = nuidp; 225 nuidp->nu_hprev = (struct nfsuid *)0; 226 *nuh = nuidp; 227 } 228 } 229 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd)) 230 nfsd->nd_flag |= NFSD_AUTHFAIL; 231 error = nfssvc_nfsd(nsd, uap->argp, p); 232 } 233 if (error == EINTR || error == ERESTART) 234 error = 0; 235 return (error); 236 } 237 238 /* 239 * Adds a socket to the list for servicing by nfsds. 240 */ 241 nfssvc_addsock(fp, mynam) 242 struct file *fp; 243 struct mbuf *mynam; 244 { 245 register struct mbuf *m; 246 register int siz; 247 register struct nfssvc_sock *slp; 248 register struct socket *so; 249 struct nfssvc_sock *tslp; 250 int error, s; 251 252 so = (struct socket *)fp->f_data; 253 tslp = (struct nfssvc_sock *)0; 254 /* 255 * Add it to the list, as required. 256 */ 257 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 258 tslp = nfs_udpsock; 259 if (tslp->ns_flag & SLP_VALID) { 260 m_freem(mynam); 261 return (EPERM); 262 } 263 #ifdef ISO 264 } else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) { 265 tslp = nfs_cltpsock; 266 if (tslp->ns_flag & SLP_VALID) { 267 m_freem(mynam); 268 return (EPERM); 269 } 270 #endif /* ISO */ 271 } else { 272 slp = nfs_cltpsock->ns_next; 273 while (slp != &nfssvc_sockhead) { 274 if ((slp->ns_flag & SLP_VALID) == 0) { 275 tslp = slp; 276 break; 277 } 278 slp = slp->ns_next; 279 } 280 } 281 if (so->so_type == SOCK_STREAM) 282 siz = NFS_MAXPACKET + sizeof (u_long); 283 else 284 siz = NFS_MAXPACKET; 285 if (error = soreserve(so, siz, siz)) { 286 m_freem(mynam); 287 return (error); 288 } 289 290 /* 291 * Set protocol specific options { for now TCP only } and 292 * reserve some space. For datagram sockets, this can get called 293 * repeatedly for the same socket, but that isn't harmful. 294 */ 295 if (so->so_type == SOCK_STREAM) { 296 MGET(m, M_WAIT, MT_SOOPTS); 297 *mtod(m, int *) = 1; 298 m->m_len = sizeof(int); 299 sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m); 300 } 301 if (so->so_proto->pr_domain->dom_family == AF_INET && 302 so->so_proto->pr_protocol == IPPROTO_TCP) { 303 MGET(m, M_WAIT, MT_SOOPTS); 304 *mtod(m, int *) = 1; 305 m->m_len = sizeof(int); 306 sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m); 307 } 308 so->so_rcv.sb_flags &= ~SB_NOINTR; 309 so->so_rcv.sb_timeo = 0; 310 so->so_snd.sb_flags &= ~SB_NOINTR; 311 so->so_snd.sb_timeo = 0; 312 if (tslp) 313 slp = tslp; 314 else { 315 slp = (struct nfssvc_sock *) 316 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 317 bzero((caddr_t)slp, sizeof (struct nfssvc_sock)); 318 slp->ns_prev = nfssvc_sockhead.ns_prev; 319 slp->ns_prev->ns_next = slp; 320 slp->ns_next = &nfssvc_sockhead; 321 nfssvc_sockhead.ns_prev = slp; 322 slp->ns_lrunext = slp->ns_lruprev = (struct nfsuid *)slp; 323 } 324 slp->ns_so = so; 325 slp->ns_nam = mynam; 326 fp->f_count++; 327 slp->ns_fp = fp; 328 s = splnet(); 329 so->so_upcallarg = (caddr_t)slp; 330 so->so_upcall = nfsrv_rcv; 331 slp->ns_flag = (SLP_VALID | SLP_NEEDQ); 332 nfsd_head.nd_flag |= NFSD_CHECKSLP; 333 nfsrv_wakenfsd(slp); 334 splx(s); 335 return (0); 336 } 337 338 /* 339 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 340 * until it is killed by a signal. 341 */ 342 nfssvc_nfsd(nsd, argp, p) 343 struct nfsd_srvargs *nsd; 344 caddr_t argp; 345 struct proc *p; 346 { 347 register struct mbuf *m, *nam2; 348 register int siz; 349 register struct nfssvc_sock *slp; 350 register struct socket *so; 351 register int *solockp; 352 struct nfsd *nd = nsd->nsd_nfsd; 353 struct mbuf *mreq, *nam; 354 int error, cacherep, s; 355 int sotype; 356 357 if (nd == (struct nfsd *)0) { 358 nsd->nsd_nfsd = nd = (struct nfsd *) 359 malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK); 360 bzero((caddr_t)nd, sizeof (struct nfsd)); 361 nd->nd_cr.cr_ref = 1; 362 nd->nd_procp = p; 363 s = splnet(); 364 insque(nd, &nfsd_head); 365 splx(s); 366 nfs_numnfsd++; 367 } 368 /* 369 * Loop getting rpc requests until SIGKILL. 370 */ 371 for (;;) { 372 if ((nd->nd_flag & NFSD_REQINPROG) == 0) { 373 s = splnet(); 374 while (nd->nd_slp == (struct nfssvc_sock *)0 && 375 (nfsd_head.nd_flag & NFSD_CHECKSLP) == 0) { 376 nd->nd_flag |= NFSD_WAITING; 377 nfsd_waiting++; 378 if (tsleep((caddr_t)nd, PSOCK | PCATCH, "nfsd", 0)) { 379 nfsd_waiting--; 380 splx(s); 381 goto done; 382 } 383 nfsd_waiting--; 384 } 385 if (nd->nd_slp == (struct nfssvc_sock *)0 && 386 (nfsd_head.nd_flag & NFSD_CHECKSLP)) { 387 slp = nfssvc_sockhead.ns_next; 388 while (slp != &nfssvc_sockhead) { 389 if ((slp->ns_flag & SLP_VALID) && 390 (slp->ns_flag & (SLP_NEEDQ | SLP_DISCONN))) { 391 nd->nd_slp = slp; 392 nd->nd_sref = slp->ns_sref; 393 break; 394 } 395 slp = slp->ns_next; 396 } 397 if (slp == &nfssvc_sockhead) 398 nfsd_head.nd_flag &= ~NFSD_CHECKSLP; 399 } 400 if ((slp = nd->nd_slp) == (struct nfssvc_sock *)0) { 401 splx(s); 402 continue; 403 } 404 if (slp->ns_flag & SLP_DISCONN) { 405 slp->ns_flag &= ~SLP_DISCONN; 406 (void) nfs_sndlock(&slp->ns_solock, 407 (struct nfsreq *)0); 408 if (nd->nd_sref == slp->ns_sref) 409 nfsrv_zapsock(slp, p); 410 nfs_sndunlock(&slp->ns_solock); 411 nd->nd_slp = (struct nfssvc_sock *)0; 412 splx(s); 413 continue; 414 } 415 if (slp->ns_flag & SLP_NEEDQ) { 416 slp->ns_flag &= ~SLP_NEEDQ; 417 (void) nfs_sndlock(&slp->ns_solock, 418 (struct nfsreq *)0); 419 if (nd->nd_sref == slp->ns_sref) { 420 if (slp->ns_so->so_rcv.sb_cc > 0) 421 nfsrv_rcv(slp->ns_so, (caddr_t)slp, 422 M_WAIT); 423 else if (slp->ns_so->so_type == SOCK_STREAM) 424 (void) nfsrv_getstream(slp, M_WAIT); 425 } 426 nfs_sndunlock(&slp->ns_solock); 427 } 428 error = nfsrv_dorec(slp, nd); 429 splx(s); 430 if (error) { 431 nd->nd_slp = (struct nfssvc_sock *)0; 432 continue; 433 } 434 nd->nd_flag |= NFSD_REQINPROG; 435 } else 436 slp = nd->nd_slp; 437 so = slp->ns_so; 438 sotype = so->so_type; 439 440 /* 441 * Check to see if authorization is needed. 442 */ 443 if (nd->nd_flag & NFSD_NEEDAUTH) { 444 nd->nd_flag &= ~NFSD_NEEDAUTH; 445 nsd->nsd_uid = nd->nd_cr.cr_uid; 446 nsd->nsd_haddr = 447 mtod(slp->ns_nam, struct sockaddr_in *)->sin_addr.s_addr; 448 nsd->nsd_authlen = nd->nd_authlen; 449 (void) copyout(nd->nd_authstr, nsd->nsd_authstr, 450 nd->nd_authlen); 451 (void) copyout((caddr_t)nsd, argp, sizeof (*nsd)); 452 return (ENEEDAUTH); 453 } 454 if (so->so_proto->pr_flags & PR_CONNREQUIRED) 455 solockp = &slp->ns_solock; 456 else 457 solockp = (int *)0; 458 nd->nd_repstat = 0; 459 /* 460 * nam == nam2 for connectionless protocols such as UDP 461 * nam2 == NULL for connection based protocols to disable 462 * recent request caching. 463 */ 464 nam2 = nd->nd_nam; 465 466 if (nam2) { 467 nam = nam2; 468 cacherep = nfsrv_getcache(nam2, nd, &mreq); 469 } else { 470 nam = slp->ns_nam; 471 cacherep = RC_DOIT; 472 } 473 474 /* 475 * Check for just starting up for NQNFS and send 476 * fake "try again later" replies to the NQNFS clients. 477 */ 478 if (notstarted && nqnfsstarttime <= time.tv_sec) { 479 if (modify_flag) { 480 nqnfsstarttime = time.tv_sec + nqsrv_writeslack; 481 modify_flag = 0; 482 } else 483 notstarted = 0; 484 } 485 if (notstarted) { 486 if (nd->nd_nqlflag == NQL_NOVAL) 487 cacherep = RC_DROPIT; 488 else if (nd->nd_procnum != NFSPROC_WRITE) { 489 nd->nd_procnum = NFSPROC_NOOP; 490 nd->nd_repstat = NQNFS_TRYLATER; 491 cacherep = RC_DOIT; 492 } else 493 modify_flag = 1; 494 } else if (nd->nd_flag & NFSD_AUTHFAIL) { 495 nd->nd_flag &= ~NFSD_AUTHFAIL; 496 nd->nd_procnum = NFSPROC_NOOP; 497 nd->nd_repstat = NQNFS_AUTHERR; 498 cacherep = RC_DOIT; 499 } 500 501 switch (cacherep) { 502 case RC_DOIT: 503 error = (*(nfsrv_procs[nd->nd_procnum]))(nd, 504 nd->nd_mrep, nd->nd_md, nd->nd_dpos, &nd->nd_cr, 505 nam, &mreq); 506 if (error) { 507 if (nd->nd_procnum != NQNFSPROC_VACATED) 508 nfsstats.srv_errs++; 509 if (nam2) { 510 nfsrv_updatecache(nam2, nd, FALSE, mreq); 511 m_freem(nam2); 512 } 513 break; 514 } 515 nfsstats.srvrpccnt[nd->nd_procnum]++; 516 if (nam2) 517 nfsrv_updatecache(nam2, nd, TRUE, mreq); 518 nd->nd_mrep = (struct mbuf *)0; 519 case RC_REPLY: 520 m = mreq; 521 siz = 0; 522 while (m) { 523 siz += m->m_len; 524 m = m->m_next; 525 } 526 if (siz <= 0 || siz > NFS_MAXPACKET) { 527 printf("mbuf siz=%d\n",siz); 528 panic("Bad nfs svc reply"); 529 } 530 m = mreq; 531 m->m_pkthdr.len = siz; 532 m->m_pkthdr.rcvif = (struct ifnet *)0; 533 /* 534 * For stream protocols, prepend a Sun RPC 535 * Record Mark. 536 */ 537 if (sotype == SOCK_STREAM) { 538 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 539 *mtod(m, u_long *) = htonl(0x80000000 | siz); 540 } 541 if (solockp) 542 (void) nfs_sndlock(solockp, (struct nfsreq *)0); 543 if (nd->nd_sref == slp->ns_sref) 544 error = nfs_send(so, nam2, m, (struct nfsreq *)0); 545 else { 546 error = EPIPE; 547 m_freem(m); 548 } 549 if (nam2) 550 MFREE(nam2, m); 551 if (nd->nd_mrep) 552 m_freem(nd->nd_mrep); 553 if (error == EPIPE) 554 nfsrv_zapsock(slp, p); 555 if (solockp) 556 nfs_sndunlock(solockp); 557 if (error == EINTR || error == ERESTART) 558 goto done; 559 break; 560 case RC_DROPIT: 561 m_freem(nd->nd_mrep); 562 m_freem(nam2); 563 break; 564 }; 565 nd->nd_flag &= ~NFSD_REQINPROG; 566 nd->nd_slp = (struct nfssvc_sock *)0; 567 } 568 done: 569 s = splnet(); 570 remque(nd); 571 splx(s); 572 free((caddr_t)nd, M_NFSD); 573 nsd->nsd_nfsd = (struct nfsd *)0; 574 if (--nfs_numnfsd == 0) { 575 slp = nfssvc_sockhead.ns_next; 576 while (slp != &nfssvc_sockhead) { 577 if (slp->ns_flag & SLP_VALID) 578 nfsrv_zapsock(slp, p); 579 slp = slp->ns_next; 580 } 581 nfsrv_cleancache(); /* And clear out server cache */ 582 } 583 return (error); 584 } 585 586 /* 587 * Asynchronous I/O daemons for client nfs. 588 * These babies just pretend to be disk interrupt service routines. 589 * They are mainly here for read ahead/write behind. 590 * Never returns unless it fails or gets killed. 591 */ 592 nfssvc_iod(p) 593 struct proc *p; 594 { 595 register struct buf *bp, *dp; 596 register int i, myiod; 597 int error = 0; 598 599 /* 600 * Assign my position or return error if too many already running 601 */ 602 myiod = -1; 603 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 604 if (nfs_asyncdaemon[i] == 0) { 605 nfs_asyncdaemon[i]++; 606 myiod = i; 607 break; 608 } 609 if (myiod == -1) 610 return (EBUSY); 611 nfs_numasync++; 612 dp = &nfs_bqueue; 613 /* 614 * Just loop around doin our stuff until SIGKILL 615 */ 616 for (;;) { 617 while (dp->b_actf == NULL && error == 0) { 618 nfs_iodwant[myiod] = p; 619 error = tsleep((caddr_t)&nfs_iodwant[myiod], 620 PWAIT | PCATCH, "nfsidl", 0); 621 nfs_iodwant[myiod] = (struct proc *)0; 622 } 623 while (dp->b_actf != NULL) { 624 /* Take one off the end of the list */ 625 bp = dp->b_actl; 626 if (bp->b_actl == dp) { 627 dp->b_actf = dp->b_actl = (struct buf *)0; 628 } else { 629 dp->b_actl = bp->b_actl; 630 bp->b_actl->b_actf = dp; 631 } 632 (void) nfs_doio(bp, (struct proc *)0); 633 } 634 if (error) { 635 nfs_asyncdaemon[myiod] = 0; 636 nfs_numasync--; 637 return (error); 638 } 639 } 640 } 641 642 /* 643 * Shut down a socket associated with an nfssvc_sock structure. 644 * Should be called with the send lock set, if required. 645 * The trick here is to increment the sref at the start, so that the nfsds 646 * will stop using it and clear ns_flag at the end so that it will not be 647 * reassigned during cleanup. 648 */ 649 nfsrv_zapsock(slp, p) 650 register struct nfssvc_sock *slp; 651 struct proc *p; 652 { 653 register struct nfsuid *nuidp, *onuidp; 654 register int i; 655 struct socket *so; 656 struct file *fp; 657 struct mbuf *m; 658 659 if (fp = slp->ns_fp) { 660 slp->ns_fp = (struct file *)0; 661 slp->ns_sref++; 662 so = slp->ns_so; 663 soshutdown(so, 2); 664 closef(fp, p); 665 if (slp->ns_nam) 666 MFREE(slp->ns_nam, m); 667 m_freem(slp->ns_raw); 668 m_freem(slp->ns_rec); 669 nuidp = slp->ns_lrunext; 670 while (nuidp != (struct nfsuid *)slp) { 671 onuidp = nuidp; 672 nuidp = nuidp->nu_lrunext; 673 free((caddr_t)onuidp, M_NFSUID); 674 } 675 slp->ns_lrunext = slp->ns_lruprev = (struct nfsuid *)slp; 676 for (i = 0; i < NUIDHASHSIZ; i++) 677 slp->ns_uidh[i] = (struct nfsuid *)0; 678 slp->ns_flag = 0; 679 } 680 } 681 682 /* 683 * Get an authorization string for the uid by having the mount_nfs sitting 684 * on this mount point porpous out of the kernel and do it. 685 */ 686 nfs_getauth(nmp, rep, cred, auth_type, auth_str, auth_len) 687 register struct nfsmount *nmp; 688 struct nfsreq *rep; 689 struct ucred *cred; 690 int *auth_type; 691 char **auth_str; 692 int *auth_len; 693 { 694 int error = 0; 695 696 while ((nmp->nm_flag & NFSMNT_WAITAUTH) == 0) { 697 nmp->nm_flag |= NFSMNT_WANTAUTH; 698 (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK, 699 "nfsauth1", 2 * hz); 700 if (error = nfs_sigintr(nmp, rep, rep->r_procp)) { 701 nmp->nm_flag &= ~NFSMNT_WANTAUTH; 702 return (error); 703 } 704 } 705 nmp->nm_flag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH); 706 nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 707 nmp->nm_authuid = cred->cr_uid; 708 wakeup((caddr_t)&nmp->nm_authstr); 709 710 /* 711 * And wait for mount_nfs to do its stuff. 712 */ 713 while ((nmp->nm_flag & NFSMNT_HASAUTH) == 0 && error == 0) { 714 (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK, 715 "nfsauth2", 2 * hz); 716 error = nfs_sigintr(nmp, rep, rep->r_procp); 717 } 718 if (nmp->nm_flag & NFSMNT_AUTHERR) { 719 nmp->nm_flag &= ~NFSMNT_AUTHERR; 720 error = EAUTH; 721 } 722 if (error) 723 free((caddr_t)*auth_str, M_TEMP); 724 else { 725 *auth_type = nmp->nm_authtype; 726 *auth_len = nmp->nm_authlen; 727 } 728 nmp->nm_flag &= ~NFSMNT_HASAUTH; 729 nmp->nm_flag |= NFSMNT_WAITAUTH; 730 if (nmp->nm_flag & NFSMNT_WANTAUTH) { 731 nmp->nm_flag &= ~NFSMNT_WANTAUTH; 732 wakeup((caddr_t)&nmp->nm_authtype); 733 } 734 return (error); 735 } 736