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Expand PMF_FN_* macros.
[netbsd-mini2440.git] / sys / nfs / nfs_syscalls.c
bloba01f8b5da637ee707311d063f4db955ec427a0ef
1 /* $NetBSD: nfs_syscalls.c,v 1.152 2009/12/31 19:38:16 christos Exp $ */
2
3 /*
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Rick Macklem at The University of Guelph.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)nfs_syscalls.c 8.5 (Berkeley) 3/30/95
35 */
36
37 #include <sys/cdefs.h>
38 __KERNEL_RCSID(0, "$NetBSD: nfs_syscalls.c,v 1.152 2009/12/31 19:38:16 christos Exp $");
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/kernel.h>
43 #include <sys/file.h>
44 #include <sys/stat.h>
45 #include <sys/vnode.h>
46 #include <sys/mount.h>
47 #include <sys/proc.h>
48 #include <sys/uio.h>
49 #include <sys/malloc.h>
50 #include <sys/kmem.h>
51 #include <sys/buf.h>
52 #include <sys/mbuf.h>
53 #include <sys/socket.h>
54 #include <sys/socketvar.h>
55 #include <sys/signalvar.h>
56 #include <sys/domain.h>
57 #include <sys/protosw.h>
58 #include <sys/namei.h>
59 #include <sys/syslog.h>
60 #include <sys/filedesc.h>
61 #include <sys/kthread.h>
62 #include <sys/kauth.h>
63 #include <sys/syscallargs.h>
64
65 #include <netinet/in.h>
66 #include <netinet/tcp.h>
67 #include <nfs/xdr_subs.h>
68 #include <nfs/rpcv2.h>
69 #include <nfs/nfsproto.h>
70 #include <nfs/nfs.h>
71 #include <nfs/nfsm_subs.h>
72 #include <nfs/nfsrvcache.h>
73 #include <nfs/nfsmount.h>
74 #include <nfs/nfsnode.h>
75 #include <nfs/nfsrtt.h>
76 #include <nfs/nfs_var.h>
77
78 extern int32_t (*nfsrv3_procs[NFS_NPROCS])(struct nfsrv_descript *,
79 struct nfssvc_sock *,
80 struct lwp *, struct mbuf **);
81 extern int nfsrvw_procrastinate;
82 extern int nuidhash_max;
83
84 static int nfs_numnfsd = 0;
85 static struct nfsdrt nfsdrt;
86 kmutex_t nfsd_lock;
87 struct nfssvc_sockhead nfssvc_sockhead;
88 kcondvar_t nfsd_initcv;
89 struct nfssvc_sockhead nfssvc_sockpending;
90 struct nfsdhead nfsd_head;
91 struct nfsdidlehead nfsd_idle_head;
92
93 int nfssvc_sockhead_flag;
94 int nfsd_head_flag;
95
96 struct nfssvc_sock *nfs_udpsock;
97 struct nfssvc_sock *nfs_udp6sock;
98
99 static struct nfssvc_sock *nfsrv_sockalloc(void);
100 static void nfsrv_sockfree(struct nfssvc_sock *);
101 static void nfsd_rt(int, struct nfsrv_descript *, int);
102
103 /*
104 * NFS server system calls
105 */
106
107
108 /*
109 * Nfs server pseudo system call for the nfsd's
110 * Based on the flag value it either:
111 * - adds a socket to the selection list
112 * - remains in the kernel as an nfsd
113 * - remains in the kernel as an nfsiod
114 */
115 int
116 sys_nfssvc(struct lwp *l, const struct sys_nfssvc_args *uap, register_t *retval)
117 {
118 /* {
119 syscallarg(int) flag;
120 syscallarg(void *) argp;
121 } */
122 int error;
123 file_t *fp;
124 struct mbuf *nam;
125 struct nfsd_args nfsdarg;
126 struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs;
127 struct nfsd *nfsd;
128 struct nfssvc_sock *slp;
129 struct nfsuid *nuidp;
130
131 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_NFS,
132 KAUTH_REQ_NETWORK_NFS_SVC, NULL, NULL, NULL);
133 if (error)
134 return (error);
135
136 mutex_enter(&nfsd_lock);
137 while (nfssvc_sockhead_flag & SLP_INIT) {
138 cv_wait(&nfsd_initcv, &nfsd_lock);
139 }
140 mutex_exit(&nfsd_lock);
141
142 if (SCARG(uap, flag) & NFSSVC_BIOD) {
143 /* Dummy implementation of nfsios for 1.4 and earlier. */
144 error = kpause("nfsbiod", true, 0, NULL);
145 } else if (SCARG(uap, flag) & NFSSVC_MNTD) {
146 error = ENOSYS;
147 } else if (SCARG(uap, flag) & NFSSVC_ADDSOCK) {
148 error = copyin(SCARG(uap, argp), (void *)&nfsdarg,
149 sizeof(nfsdarg));
150 if (error)
151 return (error);
152 /* getsock() will use the descriptor for us */
153 if ((fp = fd_getfile(nfsdarg.sock)) == NULL)
154 return (EBADF);
155 if (fp->f_type != DTYPE_SOCKET) {
156 fd_putfile(nfsdarg.sock);
157 return (ENOTSOCK);
158 }
159 /*
160 * Get the client address for connected sockets.
161 */
162 if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
163 nam = (struct mbuf *)0;
164 else {
165 error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen,
166 MT_SONAME);
167 if (error) {
168 fd_putfile(nfsdarg.sock);
169 return (error);
170 }
171 }
172 error = nfssvc_addsock(fp, nam);
173 fd_putfile(nfsdarg.sock);
174 } else if (SCARG(uap, flag) & NFSSVC_SETEXPORTSLIST) {
175 struct export_args *args;
176 struct mountd_exports_list mel;
177
178 error = copyin(SCARG(uap, argp), &mel, sizeof(mel));
179 if (error != 0)
180 return error;
181
182 args = (struct export_args *)malloc(mel.mel_nexports *
183 sizeof(struct export_args), M_TEMP, M_WAITOK);
184 error = copyin(mel.mel_exports, args, mel.mel_nexports *
185 sizeof(struct export_args));
186 if (error != 0) {
187 free(args, M_TEMP);
188 return error;
189 }
190 mel.mel_exports = args;
191
192 error = mountd_set_exports_list(&mel, l, NULL);
193
194 free(args, M_TEMP);
195 } else {
196 error = copyin(SCARG(uap, argp), (void *)nsd, sizeof (*nsd));
197 if (error)
198 return (error);
199 if ((SCARG(uap, flag) & NFSSVC_AUTHIN) &&
200 ((nfsd = nsd->nsd_nfsd)) != NULL &&
201 (nfsd->nfsd_slp->ns_flags & SLP_VALID)) {
202 slp = nfsd->nfsd_slp;
203
204 /*
205 * First check to see if another nfsd has already
206 * added this credential.
207 */
208 LIST_FOREACH(nuidp, NUIDHASH(slp, nsd->nsd_cr.cr_uid),
209 nu_hash) {
210 if (kauth_cred_geteuid(nuidp->nu_cr) ==
211 nsd->nsd_cr.cr_uid &&
212 (!nfsd->nfsd_nd->nd_nam2 ||
213 netaddr_match(NU_NETFAM(nuidp),
214 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
215 break;
216 }
217 if (nuidp) {
218 kauth_cred_hold(nuidp->nu_cr);
219 nfsd->nfsd_nd->nd_cr = nuidp->nu_cr;
220 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
221 } else {
222 /*
223 * Nope, so we will.
224 */
225 if (slp->ns_numuids < nuidhash_max) {
226 slp->ns_numuids++;
227 nuidp = kmem_alloc(sizeof(*nuidp), KM_SLEEP);
228 } else
229 nuidp = (struct nfsuid *)0;
230 if ((slp->ns_flags & SLP_VALID) == 0) {
231 if (nuidp)
232 kmem_free(nuidp, sizeof(*nuidp));
233 } else {
234 if (nuidp == (struct nfsuid *)0) {
235 nuidp = TAILQ_FIRST(&slp->ns_uidlruhead);
236 LIST_REMOVE(nuidp, nu_hash);
237 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
238 nu_lru);
239 if (nuidp->nu_flag & NU_NAM)
240 m_freem(nuidp->nu_nam);
241 }
242 nuidp->nu_flag = 0;
243 kauth_uucred_to_cred(nuidp->nu_cr,
244 &nsd->nsd_cr);
245 nuidp->nu_timestamp = nsd->nsd_timestamp;
246 nuidp->nu_expire = time_second + nsd->nsd_ttl;
247 /*
248 * and save the session key in nu_key.
249 */
250 memcpy(nuidp->nu_key, nsd->nsd_key,
251 sizeof(nsd->nsd_key));
252 if (nfsd->nfsd_nd->nd_nam2) {
253 struct sockaddr_in *saddr;
254
255 saddr = mtod(nfsd->nfsd_nd->nd_nam2,
256 struct sockaddr_in *);
257 switch (saddr->sin_family) {
258 case AF_INET:
259 nuidp->nu_flag |= NU_INETADDR;
260 nuidp->nu_inetaddr =
261 saddr->sin_addr.s_addr;
262 break;
263 case AF_INET6:
264 nuidp->nu_flag |= NU_NAM;
265 nuidp->nu_nam = m_copym(
266 nfsd->nfsd_nd->nd_nam2, 0,
267 M_COPYALL, M_WAIT);
268 break;
269 default:
270 return EAFNOSUPPORT;
271 };
272 }
273 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
274 nu_lru);
275 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
276 nuidp, nu_hash);
277 kauth_cred_hold(nuidp->nu_cr);
278 nfsd->nfsd_nd->nd_cr = nuidp->nu_cr;
279 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
280 }
281 }
282 }
283 if ((SCARG(uap, flag) & NFSSVC_AUTHINFAIL) &&
284 (nfsd = nsd->nsd_nfsd))
285 nfsd->nfsd_flag |= NFSD_AUTHFAIL;
286 error = nfssvc_nfsd(nsd, SCARG(uap, argp), l);
287 }
288 if (error == EINTR || error == ERESTART)
289 error = 0;
290 return (error);
291 }
292
293 static struct nfssvc_sock *
294 nfsrv_sockalloc(void)
295 {
296 struct nfssvc_sock *slp;
297
298 slp = kmem_alloc(sizeof(*slp), KM_SLEEP);
299 memset(slp, 0, sizeof (struct nfssvc_sock));
300 mutex_init(&slp->ns_lock, MUTEX_DRIVER, IPL_SOFTNET);
301 mutex_init(&slp->ns_alock, MUTEX_DRIVER, IPL_SOFTNET);
302 cv_init(&slp->ns_cv, "nfsdsock");
303 TAILQ_INIT(&slp->ns_uidlruhead);
304 LIST_INIT(&slp->ns_tq);
305 SIMPLEQ_INIT(&slp->ns_sendq);
306 mutex_enter(&nfsd_lock);
307 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
308 mutex_exit(&nfsd_lock);
309
310 return slp;
311 }
312
313 static void
314 nfsrv_sockfree(struct nfssvc_sock *slp)
315 {
316
317 KASSERT(slp->ns_so == NULL);
318 KASSERT(slp->ns_fp == NULL);
319 KASSERT((slp->ns_flags & SLP_VALID) == 0);
320 mutex_destroy(&slp->ns_lock);
321 mutex_destroy(&slp->ns_alock);
322 cv_destroy(&slp->ns_cv);
323 kmem_free(slp, sizeof(*slp));
324 }
325
326 /*
327 * Adds a socket to the list for servicing by nfsds.
328 */
329 int
330 nfssvc_addsock(file_t *fp, struct mbuf *mynam)
331 {
332 int siz;
333 struct nfssvc_sock *slp;
334 struct socket *so;
335 struct nfssvc_sock *tslp;
336 int error;
337 int val;
338
339 so = (struct socket *)fp->f_data;
340 tslp = (struct nfssvc_sock *)0;
341 /*
342 * Add it to the list, as required.
343 */
344 if (so->so_proto->pr_protocol == IPPROTO_UDP) {
345 if (so->so_proto->pr_domain->dom_family == AF_INET6)
346 tslp = nfs_udp6sock;
347 else {
348 tslp = nfs_udpsock;
349 if (tslp->ns_flags & SLP_VALID) {
350 m_freem(mynam);
351 return (EPERM);
352 }
353 }
354 }
355 if (so->so_type == SOCK_STREAM)
356 siz = NFS_MAXPACKET + sizeof (u_long);
357 else
358 siz = NFS_MAXPACKET;
359 solock(so);
360 error = soreserve(so, siz, siz);
361 sounlock(so);
362 if (error) {
363 m_freem(mynam);
364 return (error);
365 }
366
367 /*
368 * Set protocol specific options { for now TCP only } and
369 * reserve some space. For datagram sockets, this can get called
370 * repeatedly for the same socket, but that isn't harmful.
371 */
372 if (so->so_type == SOCK_STREAM) {
373 val = 1;
374 so_setsockopt(NULL, so, SOL_SOCKET, SO_KEEPALIVE, &val,
375 sizeof(val));
376 }
377 if ((so->so_proto->pr_domain->dom_family == AF_INET ||
378 so->so_proto->pr_domain->dom_family == AF_INET6) &&
379 so->so_proto->pr_protocol == IPPROTO_TCP) {
380 val = 1;
381 so_setsockopt(NULL, so, IPPROTO_TCP, TCP_NODELAY, &val,
382 sizeof(val));
383 }
384 solock(so);
385 so->so_rcv.sb_flags &= ~SB_NOINTR;
386 so->so_rcv.sb_timeo = 0;
387 so->so_snd.sb_flags &= ~SB_NOINTR;
388 so->so_snd.sb_timeo = 0;
389 sounlock(so);
390 if (tslp) {
391 slp = tslp;
392 } else {
393 slp = nfsrv_sockalloc();
394 }
395 slp->ns_so = so;
396 slp->ns_nam = mynam;
397 mutex_enter(&fp->f_lock);
398 fp->f_count++;
399 mutex_exit(&fp->f_lock);
400 slp->ns_fp = fp;
401 slp->ns_flags = SLP_VALID;
402 slp->ns_aflags = SLP_A_NEEDQ;
403 slp->ns_gflags = 0;
404 slp->ns_sflags = 0;
405 solock(so);
406 so->so_upcallarg = (void *)slp;
407 so->so_upcall = nfsrv_soupcall;
408 so->so_rcv.sb_flags |= SB_UPCALL;
409 sounlock(so);
410 nfsrv_wakenfsd(slp);
411 return (0);
412 }
413
414 /*
415 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
416 * until it is killed by a signal.
417 */
418 int
419 nfssvc_nfsd(struct nfsd_srvargs *nsd, void *argp, struct lwp *l)
420 {
421 struct timeval tv;
422 struct mbuf *m;
423 struct nfssvc_sock *slp;
424 struct nfsd *nfsd = nsd->nsd_nfsd;
425 struct nfsrv_descript *nd = NULL;
426 struct mbuf *mreq;
427 u_quad_t cur_usec;
428 int error = 0, cacherep, siz, sotype, writes_todo;
429 struct proc *p = l->l_proc;
430 bool doreinit;
431
432 #ifndef nolint
433 cacherep = RC_DOIT;
434 writes_todo = 0;
435 #endif
436 if (nfsd == NULL) {
437 nsd->nsd_nfsd = nfsd = kmem_alloc(sizeof(*nfsd), KM_SLEEP);
438 memset(nfsd, 0, sizeof (struct nfsd));
439 cv_init(&nfsd->nfsd_cv, "nfsd");
440 nfsd->nfsd_procp = p;
441 mutex_enter(&nfsd_lock);
442 while ((nfssvc_sockhead_flag & SLP_INIT) != 0) {
443 KASSERT(nfs_numnfsd == 0);
444 cv_wait(&nfsd_initcv, &nfsd_lock);
445 }
446 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
447 nfs_numnfsd++;
448 mutex_exit(&nfsd_lock);
449 }
450 /*
451 * Loop getting rpc requests until SIGKILL.
452 */
453 for (;;) {
454 bool dummy;
455
456 if ((curcpu()->ci_schedstate.spc_flags & SPCF_SHOULDYIELD)
457 != 0) {
458 preempt();
459 }
460 if (nfsd->nfsd_slp == NULL) {
461 mutex_enter(&nfsd_lock);
462 while (nfsd->nfsd_slp == NULL &&
463 (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
464 SLIST_INSERT_HEAD(&nfsd_idle_head, nfsd,
465 nfsd_idle);
466 error = cv_wait_sig(&nfsd->nfsd_cv, &nfsd_lock);
467 if (error) {
468 slp = nfsd->nfsd_slp;
469 nfsd->nfsd_slp = NULL;
470 if (!slp)
471 SLIST_REMOVE(&nfsd_idle_head,
472 nfsd, nfsd, nfsd_idle);
473 mutex_exit(&nfsd_lock);
474 if (slp) {
475 nfsrv_wakenfsd(slp);
476 nfsrv_slpderef(slp);
477 }
478 goto done;
479 }
480 }
481 if (nfsd->nfsd_slp == NULL &&
482 (nfsd_head_flag & NFSD_CHECKSLP) != 0) {
483 slp = TAILQ_FIRST(&nfssvc_sockpending);
484 if (slp) {
485 KASSERT((slp->ns_gflags & SLP_G_DOREC)
486 != 0);
487 TAILQ_REMOVE(&nfssvc_sockpending, slp,
488 ns_pending);
489 slp->ns_gflags &= ~SLP_G_DOREC;
490 slp->ns_sref++;
491 nfsd->nfsd_slp = slp;
492 } else
493 nfsd_head_flag &= ~NFSD_CHECKSLP;
494 }
495 KASSERT(nfsd->nfsd_slp == NULL ||
496 nfsd->nfsd_slp->ns_sref > 0);
497 mutex_exit(&nfsd_lock);
498 if ((slp = nfsd->nfsd_slp) == NULL)
499 continue;
500 if (slp->ns_flags & SLP_VALID) {
501 bool more;
502
503 if (nfsdsock_testbits(slp, SLP_A_NEEDQ)) {
504 nfsrv_rcv(slp);
505 }
506 if (nfsdsock_testbits(slp, SLP_A_DISCONN)) {
507 nfsrv_zapsock(slp);
508 }
509 error = nfsrv_dorec(slp, nfsd, &nd, &more);
510 getmicrotime(&tv);
511 cur_usec = (u_quad_t)tv.tv_sec * 1000000 +
512 (u_quad_t)tv.tv_usec;
513 writes_todo = 0;
514 if (error) {
515 struct nfsrv_descript *nd2;
516
517 mutex_enter(&nfsd_lock);
518 nd2 = LIST_FIRST(&slp->ns_tq);
519 if (nd2 != NULL &&
520 nd2->nd_time <= cur_usec) {
521 error = 0;
522 cacherep = RC_DOIT;
523 writes_todo = 1;
524 }
525 mutex_exit(&nfsd_lock);
526 }
527 if (error == 0 && more) {
528 nfsrv_wakenfsd(slp);
529 }
530 }
531 } else {
532 error = 0;
533 slp = nfsd->nfsd_slp;
534 }
535 KASSERT(slp != NULL);
536 KASSERT(nfsd->nfsd_slp == slp);
537 if (error || (slp->ns_flags & SLP_VALID) == 0) {
538 if (nd) {
539 nfsdreq_free(nd);
540 nd = NULL;
541 }
542 nfsd->nfsd_slp = NULL;
543 nfsrv_slpderef(slp);
544 continue;
545 }
546 sotype = slp->ns_so->so_type;
547 if (nd) {
548 getmicrotime(&nd->nd_starttime);
549 if (nd->nd_nam2)
550 nd->nd_nam = nd->nd_nam2;
551 else
552 nd->nd_nam = slp->ns_nam;
553
554 /*
555 * Check to see if authorization is needed.
556 */
557 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
558 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
559 nsd->nsd_haddr = mtod(nd->nd_nam,
560 struct sockaddr_in *)->sin_addr.s_addr;
561 nsd->nsd_authlen = nfsd->nfsd_authlen;
562 nsd->nsd_verflen = nfsd->nfsd_verflen;
563 if (!copyout(nfsd->nfsd_authstr,
564 nsd->nsd_authstr, nfsd->nfsd_authlen) &&
565 !copyout(nfsd->nfsd_verfstr,
566 nsd->nsd_verfstr, nfsd->nfsd_verflen) &&
567 !copyout(nsd, argp, sizeof (*nsd))) {
568 return (ENEEDAUTH);
569 }
570 cacherep = RC_DROPIT;
571 } else
572 cacherep = nfsrv_getcache(nd, slp, &mreq);
573
574 if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
575 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
576 nd->nd_procnum = NFSPROC_NOOP;
577 nd->nd_repstat =
578 (NFSERR_AUTHERR | AUTH_TOOWEAK);
579 cacherep = RC_DOIT;
580 }
581 }
582
583 /*
584 * Loop to get all the write rpc relies that have been
585 * gathered together.
586 */
587 do {
588 switch (cacherep) {
589 case RC_DOIT:
590 mreq = NULL;
591 netexport_rdlock();
592 if (writes_todo || nd == NULL ||
593 (!(nd->nd_flag & ND_NFSV3) &&
594 nd->nd_procnum == NFSPROC_WRITE &&
595 nfsrvw_procrastinate > 0))
596 error = nfsrv_writegather(&nd, slp,
597 l, &mreq);
598 else
599 error =
600 (*(nfsrv3_procs[nd->nd_procnum]))
601 (nd, slp, l, &mreq);
602 netexport_rdunlock();
603 if (mreq == NULL) {
604 if (nd != NULL) {
605 if (nd->nd_nam2)
606 m_free(nd->nd_nam2);
607 }
608 break;
609 }
610 if (error) {
611 nfsstats.srv_errs++;
612 nfsrv_updatecache(nd, false, mreq);
613 if (nd->nd_nam2)
614 m_freem(nd->nd_nam2);
615 break;
616 }
617 nfsstats.srvrpccnt[nd->nd_procnum]++;
618 nfsrv_updatecache(nd, true, mreq);
619 nd->nd_mrep = (struct mbuf *)0;
620 case RC_REPLY:
621 m = mreq;
622 siz = 0;
623 while (m) {
624 siz += m->m_len;
625 m = m->m_next;
626 }
627 if (siz <= 0 || siz > NFS_MAXPACKET) {
628 printf("mbuf siz=%d\n",siz);
629 panic("Bad nfs svc reply");
630 }
631 m = mreq;
632 m->m_pkthdr.len = siz;
633 m->m_pkthdr.rcvif = (struct ifnet *)0;
634 /*
635 * For stream protocols, prepend a Sun RPC
636 * Record Mark.
637 */
638 if (sotype == SOCK_STREAM) {
639 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT);
640 *mtod(m, u_int32_t *) =
641 htonl(0x80000000 | siz);
642 }
643 nd->nd_mreq = m;
644 if (nfsrtton) {
645 nfsd_rt(slp->ns_so->so_type, nd,
646 cacherep);
647 }
648 error = nfsdsock_sendreply(slp, nd);
649 nd = NULL;
650 if (error == EPIPE)
651 nfsrv_zapsock(slp);
652 if (error == EINTR || error == ERESTART) {
653 nfsd->nfsd_slp = NULL;
654 nfsrv_slpderef(slp);
655 goto done;
656 }
657 break;
658 case RC_DROPIT:
659 if (nfsrtton)
660 nfsd_rt(sotype, nd, cacherep);
661 m_freem(nd->nd_mrep);
662 m_freem(nd->nd_nam2);
663 break;
664 }
665 if (nd) {
666 nfsdreq_free(nd);
667 nd = NULL;
668 }
669
670 /*
671 * Check to see if there are outstanding writes that
672 * need to be serviced.
673 */
674 getmicrotime(&tv);
675 cur_usec = (u_quad_t)tv.tv_sec * 1000000 +
676 (u_quad_t)tv.tv_usec;
677 mutex_enter(&nfsd_lock);
678 if (LIST_FIRST(&slp->ns_tq) &&
679 LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) {
680 cacherep = RC_DOIT;
681 writes_todo = 1;
682 } else
683 writes_todo = 0;
684 mutex_exit(&nfsd_lock);
685 } while (writes_todo);
686 if (nfsrv_dorec(slp, nfsd, &nd, &dummy)) {
687 nfsd->nfsd_slp = NULL;
688 nfsrv_slpderef(slp);
689 }
690 }
691 done:
692 mutex_enter(&nfsd_lock);
693 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
694 doreinit = --nfs_numnfsd == 0;
695 if (doreinit)
696 nfssvc_sockhead_flag |= SLP_INIT;
697 mutex_exit(&nfsd_lock);
698 cv_destroy(&nfsd->nfsd_cv);
699 kmem_free(nfsd, sizeof(*nfsd));
700 nsd->nsd_nfsd = NULL;
701 if (doreinit)
702 nfsrv_init(true); /* Reinitialize everything */
703 return (error);
704 }
705
706 /*
707 * Shut down a socket associated with an nfssvc_sock structure.
708 * Should be called with the send lock set, if required.
709 * The trick here is to increment the sref at the start, so that the nfsds
710 * will stop using it and clear ns_flag at the end so that it will not be
711 * reassigned during cleanup.
712 *
713 * called at splsoftnet.
714 */
715 void
716 nfsrv_zapsock(struct nfssvc_sock *slp)
717 {
718 struct nfsuid *nuidp, *nnuidp;
719 struct nfsrv_descript *nwp;
720 struct socket *so;
721 struct mbuf *m;
722
723 if (nfsdsock_drain(slp)) {
724 return;
725 }
726 mutex_enter(&nfsd_lock);
727 if (slp->ns_gflags & SLP_G_DOREC) {
728 TAILQ_REMOVE(&nfssvc_sockpending, slp, ns_pending);
729 slp->ns_gflags &= ~SLP_G_DOREC;
730 }
731 mutex_exit(&nfsd_lock);
732
733 so = slp->ns_so;
734 KASSERT(so != NULL);
735 solock(so);
736 so->so_upcall = NULL;
737 so->so_upcallarg = NULL;
738 so->so_rcv.sb_flags &= ~SB_UPCALL;
739 soshutdown(so, SHUT_RDWR);
740 sounlock(so);
741
742 m_freem(slp->ns_raw);
743 m = slp->ns_rec;
744 while (m != NULL) {
745 struct mbuf *n;
746
747 n = m->m_nextpkt;
748 m_freem(m);
749 m = n;
750 }
751 /* XXX what about freeing ns_frag ? */
752 for (nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); nuidp != 0;
753 nuidp = nnuidp) {
754 nnuidp = TAILQ_NEXT(nuidp, nu_lru);
755 LIST_REMOVE(nuidp, nu_hash);
756 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
757 if (nuidp->nu_flag & NU_NAM)
758 m_freem(nuidp->nu_nam);
759 kmem_free(nuidp, sizeof(*nuidp));
760 }
761 mutex_enter(&nfsd_lock);
762 while ((nwp = LIST_FIRST(&slp->ns_tq)) != NULL) {
763 LIST_REMOVE(nwp, nd_tq);
764 mutex_exit(&nfsd_lock);
765 nfsdreq_free(nwp);
766 mutex_enter(&nfsd_lock);
767 }
768 mutex_exit(&nfsd_lock);
769 }
770
771 /*
772 * Derefence a server socket structure. If it has no more references and
773 * is no longer valid, you can throw it away.
774 */
775 void
776 nfsrv_slpderef(struct nfssvc_sock *slp)
777 {
778 uint32_t ref;
779
780 mutex_enter(&nfsd_lock);
781 KASSERT(slp->ns_sref > 0);
782 ref = --slp->ns_sref;
783 if (ref == 0 && (slp->ns_flags & SLP_VALID) == 0) {
784 file_t *fp;
785
786 KASSERT((slp->ns_gflags & SLP_G_DOREC) == 0);
787 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
788 mutex_exit(&nfsd_lock);
789
790 fp = slp->ns_fp;
791 if (fp != NULL) {
792 slp->ns_fp = NULL;
793 KASSERT(fp != NULL);
794 KASSERT(fp->f_data == slp->ns_so);
795 KASSERT(fp->f_count > 0);
796 closef(fp);
797 slp->ns_so = NULL;
798 }
799
800 if (slp->ns_nam)
801 m_free(slp->ns_nam);
802 nfsrv_sockfree(slp);
803 } else
804 mutex_exit(&nfsd_lock);
805 }
806
807 /*
808 * Initialize the data structures for the server.
809 * Handshake with any new nfsds starting up to avoid any chance of
810 * corruption.
811 */
812 void
813 nfsrv_init(int terminating)
814 {
815 struct nfssvc_sock *slp;
816
817 if (!terminating) {
818 mutex_init(&nfsd_lock, MUTEX_DRIVER, IPL_SOFTNET);
819 cv_init(&nfsd_initcv, "nfsdinit");
820 }
821
822 mutex_enter(&nfsd_lock);
823 if (!terminating && (nfssvc_sockhead_flag & SLP_INIT) != 0)
824 panic("nfsd init");
825 nfssvc_sockhead_flag |= SLP_INIT;
826
827 if (terminating) {
828 KASSERT(SLIST_EMPTY(&nfsd_idle_head));
829 KASSERT(TAILQ_EMPTY(&nfsd_head));
830 while ((slp = TAILQ_FIRST(&nfssvc_sockhead)) != NULL) {
831 mutex_exit(&nfsd_lock);
832 KASSERT(slp->ns_sref == 0);
833 slp->ns_sref++;
834 nfsrv_zapsock(slp);
835 nfsrv_slpderef(slp);
836 mutex_enter(&nfsd_lock);
837 }
838 KASSERT(TAILQ_EMPTY(&nfssvc_sockpending));
839 mutex_exit(&nfsd_lock);
840 nfsrv_cleancache(); /* And clear out server cache */
841 } else {
842 mutex_exit(&nfsd_lock);
843 nfs_pub.np_valid = 0;
844 }
845
846 TAILQ_INIT(&nfssvc_sockhead);
847 TAILQ_INIT(&nfssvc_sockpending);
848
849 TAILQ_INIT(&nfsd_head);
850 SLIST_INIT(&nfsd_idle_head);
851 nfsd_head_flag &= ~NFSD_CHECKSLP;
852
853 nfs_udpsock = nfsrv_sockalloc();
854 nfs_udp6sock = nfsrv_sockalloc();
855
856 mutex_enter(&nfsd_lock);
857 nfssvc_sockhead_flag &= ~SLP_INIT;
858 cv_broadcast(&nfsd_initcv);
859 mutex_exit(&nfsd_lock);
860 }
861
862 void
863 nfsrv_fini(void)
864 {
865
866 nfsrv_init(true);
867 cv_destroy(&nfsd_initcv);
868 mutex_destroy(&nfsd_lock);
869 }
870
871 /*
872 * Add entries to the server monitor log.
873 */
874 static void
875 nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep)
876 {
877 struct timeval tv;
878 struct drt *rt;
879
880 rt = &nfsdrt.drt[nfsdrt.pos];
881 if (cacherep == RC_DOIT)
882 rt->flag = 0;
883 else if (cacherep == RC_REPLY)
884 rt->flag = DRT_CACHEREPLY;
885 else
886 rt->flag = DRT_CACHEDROP;
887 if (sotype == SOCK_STREAM)
888 rt->flag |= DRT_TCP;
889 if (nd->nd_flag & ND_NFSV3)
890 rt->flag |= DRT_NFSV3;
891 rt->proc = nd->nd_procnum;
892 if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET)
893 rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr;
894 else
895 rt->ipadr = INADDR_ANY;
896 getmicrotime(&tv);
897 rt->resptime = ((tv.tv_sec - nd->nd_starttime.tv_sec) * 1000000) +
898 (tv.tv_usec - nd->nd_starttime.tv_usec);
899 rt->tstamp = tv;
900 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
901 }
NetBSD on the FriendlyARM MINI2440