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Fix numerous compiler warnings and format conversion specifiers.
[dragonfly.git] / sys / vfs / nfs / nfs_syscalls.c
blobe71f6f21785b36a47a3e4f1bb403217485492a8e
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 8.5 (Berkeley) 3/30/95
37 * $FreeBSD: src/sys/nfs/nfs_syscalls.c,v 1.58.2.1 2000/11/26 02:30:06 dillon Exp $
38 * $DragonFly: src/sys/vfs/nfs/nfs_syscalls.c,v 1.31 2008/01/05 14:02:41 swildner Exp $
39 */
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/sysproto.h>
44 #include <sys/kernel.h>
45 #include <sys/sysctl.h>
46 #include <sys/file.h>
47 #include <sys/filedesc.h>
48 #include <sys/vnode.h>
49 #include <sys/malloc.h>
50 #include <sys/mount.h>
51 #include <sys/proc.h>
52 #include <sys/priv.h>
53 #include <sys/buf.h>
54 #include <sys/mbuf.h>
55 #include <sys/resourcevar.h>
56 #include <sys/socket.h>
57 #include <sys/socketvar.h>
58 #include <sys/domain.h>
59 #include <sys/protosw.h>
60 #include <sys/nlookup.h>
61 #include <sys/mutex.h>
62 #include <vm/vm_zone.h>
63
64 #include <sys/mutex2.h>
65
66 #include <netinet/in.h>
67 #include <netinet/tcp.h>
68 #include "xdr_subs.h"
69 #include "rpcv2.h"
70 #include "nfsproto.h"
71 #include "nfs.h"
72 #include "nfsm_subs.h"
73 #include "nfsrvcache.h"
74 #include "nfsmount.h"
75 #include "nfsnode.h"
76 #include "nfsrtt.h"
77
78 #include <sys/thread2.h>
79
80 static MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure");
81
82 static int nuidhash_max = NFS_MAXUIDHASH;
83
84 #ifndef NFS_NOSERVER
85 static void nfsrv_zapsock (struct nfssvc_sock *slp);
86 #endif
87
88 #define TRUE 1
89 #define FALSE 0
90
91 SYSCTL_DECL(_vfs_nfs);
92
93 #ifndef NFS_NOSERVER
94 int nfsd_waiting = 0;
95 static struct nfsdrt nfsdrt;
96 static int nfs_numnfsd = 0;
97 static void nfsd_rt (int sotype, struct nfsrv_descript *nd,
98 int cacherep);
99 static int nfssvc_addsock (struct file *, struct sockaddr *,
100 struct thread *);
101 static int nfssvc_nfsd (struct nfsd_srvargs *,caddr_t,struct thread *);
102
103 static int nfs_privport = 0;
104 SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport, 0, "");
105 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0, "");
106 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0, "");
107 int nfs_soreserve = NFS_MAXPACKET * NFS_MAXASYNCBIO;
108 SYSCTL_INT(_vfs_nfs, OID_AUTO, soreserve, CTLFLAG_RW, &nfs_soreserve, 0, "");
109
110 /*
111 * NFS server system calls
112 */
113
114 #endif /* NFS_NOSERVER */
115 /*
116 * nfssvc_args(int flag, caddr_t argp)
117 *
118 * Nfs server psuedo system call for the nfsd's
119 * Based on the flag value it either:
120 * - adds a socket to the selection list
121 * - remains in the kernel as an nfsd
122 * - remains in the kernel as an nfsiod
123 */
124 int
125 sys_nfssvc(struct nfssvc_args *uap)
126 {
127 #ifndef NFS_NOSERVER
128 struct nlookupdata nd;
129 struct file *fp;
130 struct sockaddr *nam;
131 struct nfsd_args nfsdarg;
132 struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs;
133 struct nfsd_cargs ncd;
134 struct nfsd *nfsd;
135 struct nfssvc_sock *slp;
136 struct nfsuid *nuidp;
137 struct nfsmount *nmp;
138 struct vnode *vp;
139 #endif /* NFS_NOSERVER */
140 int error;
141 struct thread *td = curthread;
142
143 /*
144 * Must be super user
145 */
146 error = priv_check(td, PRIV_ROOT);
147 if(error)
148 return (error);
149 KKASSERT(td->td_proc); /* for ucred and p_fd */
150 while (nfssvc_sockhead_flag & SLP_INIT) {
151 nfssvc_sockhead_flag |= SLP_WANTINIT;
152 (void) tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0);
153 }
154 if (uap->flag & NFSSVC_BIOD)
155 error = ENXIO; /* no longer need nfsiod's */
156 #ifdef NFS_NOSERVER
157 else
158 error = ENXIO;
159 #else /* !NFS_NOSERVER */
160 else if (uap->flag & NFSSVC_MNTD) {
161 error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
162 if (error)
163 return (error);
164 vp = NULL;
165 error = nlookup_init(&nd, ncd.ncd_dirp, UIO_USERSPACE,
166 NLC_FOLLOW);
167 if (error == 0)
168 error = nlookup(&nd);
169 if (error == 0)
170 error = cache_vget(&nd.nl_nch, nd.nl_cred, LK_EXCLUSIVE, &vp);
171 nlookup_done(&nd);
172 if (error)
173 return (error);
174
175 if ((vp->v_flag & VROOT) == 0)
176 error = EINVAL;
177 nmp = VFSTONFS(vp->v_mount);
178 vput(vp);
179 if (error)
180 return (error);
181 if ((nmp->nm_state & NFSSTA_MNTD) &&
182 (uap->flag & NFSSVC_GOTAUTH) == 0)
183 return (0);
184 nmp->nm_state |= NFSSTA_MNTD;
185 error = nfs_clientd(nmp, td->td_proc->p_ucred, &ncd, uap->flag,
186 uap->argp, td);
187 } else if (uap->flag & NFSSVC_ADDSOCK) {
188 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
189 if (error)
190 return (error);
191 error = holdsock(td->td_proc->p_fd, nfsdarg.sock, &fp);
192 if (error)
193 return (error);
194 /*
195 * Get the client address for connected sockets.
196 */
197 if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
198 nam = NULL;
199 else {
200 error = getsockaddr(&nam, nfsdarg.name,
201 nfsdarg.namelen);
202 if (error) {
203 fdrop(fp);
204 return (error);
205 }
206 }
207 error = nfssvc_addsock(fp, nam, td);
208 fdrop(fp);
209 } else {
210 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
211 if (error)
212 return (error);
213 if ((uap->flag & NFSSVC_AUTHIN) &&
214 ((nfsd = nsd->nsd_nfsd)) != NULL &&
215 (nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
216 slp = nfsd->nfsd_slp;
217
218 /*
219 * First check to see if another nfsd has already
220 * added this credential.
221 */
222 for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first;
223 nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
224 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid &&
225 (!nfsd->nfsd_nd->nd_nam2 ||
226 netaddr_match(NU_NETFAM(nuidp),
227 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
228 break;
229 }
230 if (nuidp) {
231 nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr);
232 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
233 } else {
234 /*
235 * Nope, so we will.
236 */
237 if (slp->ns_numuids < nuidhash_max) {
238 slp->ns_numuids++;
239 nuidp = (struct nfsuid *)
240 kmalloc(sizeof (struct nfsuid), M_NFSUID,
241 M_WAITOK);
242 } else
243 nuidp = NULL;
244 if ((slp->ns_flag & SLP_VALID) == 0) {
245 if (nuidp)
246 kfree((caddr_t)nuidp, M_NFSUID);
247 } else {
248 if (nuidp == NULL) {
249 nuidp = TAILQ_FIRST(&slp->ns_uidlruhead);
250 LIST_REMOVE(nuidp, nu_hash);
251 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
252 nu_lru);
253 if (nuidp->nu_flag & NU_NAM)
254 FREE(nuidp->nu_nam, M_SONAME);
255 }
256 nuidp->nu_flag = 0;
257 nuidp->nu_cr = nsd->nsd_cr;
258 if (nuidp->nu_cr.cr_ngroups > NGROUPS)
259 nuidp->nu_cr.cr_ngroups = NGROUPS;
260 nuidp->nu_cr.cr_ref = 1;
261 nuidp->nu_timestamp = nsd->nsd_timestamp;
262 nuidp->nu_expire = time_second + nsd->nsd_ttl;
263 /*
264 * and save the session key in nu_key.
265 */
266 bcopy(nsd->nsd_key, nuidp->nu_key,
267 sizeof (nsd->nsd_key));
268 if (nfsd->nfsd_nd->nd_nam2) {
269 struct sockaddr_in *saddr;
270
271 saddr = (struct sockaddr_in *)
272 nfsd->nfsd_nd->nd_nam2;
273 switch (saddr->sin_family) {
274 case AF_INET:
275 nuidp->nu_flag |= NU_INETADDR;
276 nuidp->nu_inetaddr =
277 saddr->sin_addr.s_addr;
278 break;
279 case AF_ISO:
280 default:
281 nuidp->nu_flag |= NU_NAM;
282 nuidp->nu_nam =
283 dup_sockaddr(nfsd->nfsd_nd->nd_nam2);
284 break;
285 };
286 }
287 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
288 nu_lru);
289 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
290 nuidp, nu_hash);
291 nfsrv_setcred(&nuidp->nu_cr,
292 &nfsd->nfsd_nd->nd_cr);
293 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
294 }
295 }
296 }
297 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
298 nfsd->nfsd_flag |= NFSD_AUTHFAIL;
299 error = nfssvc_nfsd(nsd, uap->argp, td);
300 }
301 #endif /* NFS_NOSERVER */
302 if (error == EINTR || error == ERESTART)
303 error = 0;
304 return (error);
305 }
306
307 #ifndef NFS_NOSERVER
308 /*
309 * Adds a socket to the list for servicing by nfsds.
310 */
311 static int
312 nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td)
313 {
314 int siz;
315 struct nfssvc_sock *slp;
316 struct socket *so;
317 int error;
318
319 so = (struct socket *)fp->f_data;
320 #if 0
321 tslp = NULL;
322 /*
323 * Add it to the list, as required.
324 */
325 if (so->so_proto->pr_protocol == IPPROTO_UDP) {
326 tslp = nfs_udpsock;
327 if (tslp->ns_flag & SLP_VALID) {
328 if (mynam != NULL)
329 FREE(mynam, M_SONAME);
330 return (EPERM);
331 }
332 }
333 #endif
334 /*
335 * Reserve buffer space in the socket. Note that due to bugs in
336 * Linux's delayed-ack code, serious performance degredation may
337 * occur with linux hosts if the minimum is used.
338 *
339 * NFS sockets are not limited to the standard sb_max or by
340 * resource limits.
341 */
342 if (so->so_type == SOCK_STREAM)
343 siz = NFS_MAXPACKET + sizeof (u_long);
344 else
345 siz = NFS_MAXPACKET;
346 if (siz < nfs_soreserve)
347 siz = nfs_soreserve;
348
349 error = soreserve(so, siz, siz, NULL);
350 if (error) {
351 if (mynam != NULL)
352 FREE(mynam, M_SONAME);
353 return (error);
354 }
355
356 /*
357 * Set protocol specific options { for now TCP only } and
358 * reserve some space. For datagram sockets, this can get called
359 * repeatedly for the same socket, but that isn't harmful.
360 */
361 if (so->so_type == SOCK_STREAM) {
362 struct sockopt sopt;
363 int val;
364
365 bzero(&sopt, sizeof sopt);
366 sopt.sopt_level = SOL_SOCKET;
367 sopt.sopt_name = SO_KEEPALIVE;
368 sopt.sopt_val = &val;
369 sopt.sopt_valsize = sizeof val;
370 val = 1;
371 sosetopt(so, &sopt);
372 }
373 if (so->so_proto->pr_domain->dom_family == AF_INET &&
374 so->so_proto->pr_protocol == IPPROTO_TCP) {
375 struct sockopt sopt;
376 int val;
377
378 bzero(&sopt, sizeof sopt);
379 sopt.sopt_level = IPPROTO_TCP;
380 sopt.sopt_name = TCP_NODELAY;
381 sopt.sopt_val = &val;
382 sopt.sopt_valsize = sizeof val;
383 val = 1;
384 sosetopt(so, &sopt);
385 }
386 so->so_rcv.ssb_flags &= ~SSB_NOINTR;
387 so->so_rcv.ssb_timeo = 0;
388 so->so_snd.ssb_flags &= ~SSB_NOINTR;
389 so->so_snd.ssb_timeo = 0;
390
391 slp = (struct nfssvc_sock *)kmalloc(sizeof (struct nfssvc_sock),
392 M_NFSSVC, M_WAITOK | M_ZERO);
393 mtx_init(&slp->ns_solock);
394 STAILQ_INIT(&slp->ns_rec);
395 TAILQ_INIT(&slp->ns_uidlruhead);
396 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
397
398 slp->ns_so = so;
399 slp->ns_nam = mynam;
400 fp->f_count++;
401 slp->ns_fp = fp;
402 crit_enter();
403 so->so_upcallarg = (caddr_t)slp;
404 so->so_upcall = nfsrv_rcv;
405 so->so_rcv.ssb_flags |= SSB_UPCALL;
406 slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
407 nfsrv_wakenfsd(slp, 1);
408 crit_exit();
409 return (0);
410 }
411
412 /*
413 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
414 * until it is killed by a signal.
415 */
416 static int
417 nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td)
418 {
419 int siz;
420 struct nfssvc_sock *slp;
421 struct nfsd *nfsd = nsd->nsd_nfsd;
422 struct nfsrv_descript *nd = NULL;
423 struct mbuf *m, *mreq;
424 int error = 0, cacherep, sotype, writes_todo;
425 int procrastinate;
426 u_quad_t cur_usec;
427
428 #ifndef nolint
429 cacherep = RC_DOIT;
430 writes_todo = 0;
431 #endif
432 if (nfsd == NULL) {
433 nsd->nsd_nfsd = nfsd = (struct nfsd *)
434 kmalloc(sizeof (struct nfsd), M_NFSD, M_WAITOK|M_ZERO);
435 crit_enter();
436 nfsd->nfsd_td = td;
437 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
438 nfs_numnfsd++;
439 } else
440 crit_enter();
441
442 /*
443 * Loop getting rpc requests until SIGKILL.
444 */
445 for (;;) {
446 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
447 while (nfsd->nfsd_slp == NULL &&
448 (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
449 nfsd->nfsd_flag |= NFSD_WAITING;
450 nfsd_waiting++;
451 error = tsleep((caddr_t)nfsd, PCATCH, "nfsd", 0);
452 nfsd_waiting--;
453 if (error)
454 goto done;
455 }
456 if (nfsd->nfsd_slp == NULL &&
457 (nfsd_head_flag & NFSD_CHECKSLP) != 0) {
458 TAILQ_FOREACH(slp, &nfssvc_sockhead, ns_chain) {
459 if ((slp->ns_flag & (SLP_VALID | SLP_DOREC))
460 == (SLP_VALID | SLP_DOREC)) {
461 slp->ns_flag &= ~SLP_DOREC;
462 slp->ns_sref++;
463 nfsd->nfsd_slp = slp;
464 break;
465 }
466 }
467 if (slp == 0)
468 nfsd_head_flag &= ~NFSD_CHECKSLP;
469 }
470 if ((slp = nfsd->nfsd_slp) == NULL)
471 continue;
472 if (slp->ns_flag & SLP_VALID) {
473 if (slp->ns_flag & SLP_DISCONN)
474 nfsrv_zapsock(slp);
475 else if (slp->ns_flag & SLP_NEEDQ) {
476 slp->ns_flag &= ~SLP_NEEDQ;
477 (void) nfs_slplock(slp, 1);
478 nfsrv_rcv(slp->ns_so, (caddr_t)slp,
479 MB_WAIT);
480 nfs_slpunlock(slp);
481 }
482 error = nfsrv_dorec(slp, nfsd, &nd);
483 cur_usec = nfs_curusec();
484 if (error && slp->ns_tq.lh_first &&
485 slp->ns_tq.lh_first->nd_time <= cur_usec) {
486 error = 0;
487 cacherep = RC_DOIT;
488 writes_todo = 1;
489 } else
490 writes_todo = 0;
491 nfsd->nfsd_flag |= NFSD_REQINPROG;
492 }
493 } else {
494 error = 0;
495 slp = nfsd->nfsd_slp;
496 }
497 if (error || (slp->ns_flag & SLP_VALID) == 0) {
498 if (nd) {
499 kfree((caddr_t)nd, M_NFSRVDESC);
500 nd = NULL;
501 }
502 nfsd->nfsd_slp = NULL;
503 nfsd->nfsd_flag &= ~NFSD_REQINPROG;
504 nfsrv_slpderef(slp);
505 continue;
506 }
507 crit_exit();
508 sotype = slp->ns_so->so_type;
509 if (nd) {
510 getmicrotime(&nd->nd_starttime);
511 if (nd->nd_nam2)
512 nd->nd_nam = nd->nd_nam2;
513 else
514 nd->nd_nam = slp->ns_nam;
515
516 /*
517 * Check to see if authorization is needed.
518 */
519 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
520 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
521 nsd->nsd_haddr =
522 ((struct sockaddr_in *)
523 nd->nd_nam)->sin_addr.s_addr;
524 nsd->nsd_authlen = nfsd->nfsd_authlen;
525 nsd->nsd_verflen = nfsd->nfsd_verflen;
526 if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr,
527 nfsd->nfsd_authlen) &&
528 !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr,
529 nfsd->nfsd_verflen) &&
530 !copyout((caddr_t)nsd, argp, sizeof (*nsd)))
531 return (ENEEDAUTH);
532 cacherep = RC_DROPIT;
533 } else {
534 cacherep = nfsrv_getcache(nd, slp, &mreq);
535 }
536
537 if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
538 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
539 nd->nd_procnum = NFSPROC_NOOP;
540 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
541 cacherep = RC_DOIT;
542 } else if (nfs_privport) {
543 /* Check if source port is privileged */
544 u_short port;
545 struct sockaddr *nam = nd->nd_nam;
546 struct sockaddr_in *sin;
547
548 sin = (struct sockaddr_in *)nam;
549 port = ntohs(sin->sin_port);
550 if (port >= IPPORT_RESERVED &&
551 nd->nd_procnum != NFSPROC_NULL) {
552 nd->nd_procnum = NFSPROC_NOOP;
553 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
554 cacherep = RC_DOIT;
555 kprintf("NFS request from unprivileged port (%s:%d)\n",
556 inet_ntoa(sin->sin_addr), port);
557 }
558 }
559
560 }
561
562 /*
563 * Loop to get all the write rpc relies that have been
564 * gathered together.
565 */
566 do {
567 switch (cacherep) {
568 case RC_DOIT:
569 if (nd && (nd->nd_flag & ND_NFSV3))
570 procrastinate = nfsrvw_procrastinate_v3;
571 else
572 procrastinate = nfsrvw_procrastinate;
573 if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
574 procrastinate > 0)
575 ) {
576 error = nfsrv_writegather(&nd, slp,
577 nfsd->nfsd_td, &mreq);
578 } else {
579 error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
580 slp, nfsd->nfsd_td, &mreq);
581 }
582 if (mreq == NULL)
583 break;
584 if (error != 0 && error != NFSERR_RETVOID) {
585 if (nd->nd_procnum != NQNFSPROC_VACATED)
586 nfsstats.srv_errs++;
587 nfsrv_updatecache(nd, FALSE, mreq);
588 if (nd->nd_nam2)
589 FREE(nd->nd_nam2, M_SONAME);
590 break;
591 }
592 nfsstats.srvrpccnt[nd->nd_procnum]++;
593 nfsrv_updatecache(nd, TRUE, mreq);
594 nd->nd_mrep = NULL;
595 case RC_REPLY:
596 m = mreq;
597 siz = 0;
598 while (m) {
599 siz += m->m_len;
600 m = m->m_next;
601 }
602 if (siz <= 0 || siz > NFS_MAXPACKET) {
603 kprintf("mbuf siz=%d\n",siz);
604 panic("Bad nfs svc reply");
605 }
606 m = mreq;
607 m->m_pkthdr.len = siz;
608 m->m_pkthdr.rcvif = NULL;
609 /*
610 * For stream protocols, prepend a Sun RPC
611 * Record Mark.
612 */
613 if (sotype == SOCK_STREAM) {
614 M_PREPEND(m, NFSX_UNSIGNED, MB_WAIT);
615 if (m == NULL)
616 return (ENOBUFS);
617 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
618 }
619 if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
620 (void) nfs_slplock(slp, 1);
621 if (slp->ns_flag & SLP_VALID)
622 error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL);
623 else {
624 error = EPIPE;
625 m_freem(m);
626 }
627 if (nfsrtton)
628 nfsd_rt(sotype, nd, cacherep);
629 if (nd->nd_nam2)
630 FREE(nd->nd_nam2, M_SONAME);
631 if (nd->nd_mrep)
632 m_freem(nd->nd_mrep);
633 if (error == EPIPE)
634 nfsrv_zapsock(slp);
635 if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
636 nfs_slpunlock(slp);
637 if (error == EINTR || error == ERESTART) {
638 kfree((caddr_t)nd, M_NFSRVDESC);
639 nfsrv_slpderef(slp);
640 crit_enter();
641 goto done;
642 }
643 break;
644 case RC_DROPIT:
645 if (nfsrtton)
646 nfsd_rt(sotype, nd, cacherep);
647 m_freem(nd->nd_mrep);
648 if (nd->nd_nam2)
649 FREE(nd->nd_nam2, M_SONAME);
650 break;
651 };
652 if (nd) {
653 FREE((caddr_t)nd, M_NFSRVDESC);
654 nd = NULL;
655 }
656
657 /*
658 * Check to see if there are outstanding writes that
659 * need to be serviced.
660 */
661 cur_usec = nfs_curusec();
662 crit_enter();
663 if (slp->ns_tq.lh_first &&
664 slp->ns_tq.lh_first->nd_time <= cur_usec) {
665 cacherep = RC_DOIT;
666 writes_todo = 1;
667 } else
668 writes_todo = 0;
669 crit_exit();
670 } while (writes_todo);
671 crit_enter();
672 if (nfsrv_dorec(slp, nfsd, &nd)) {
673 nfsd->nfsd_flag &= ~NFSD_REQINPROG;
674 nfsd->nfsd_slp = NULL;
675 nfsrv_slpderef(slp);
676 }
677 }
678 done:
679 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
680 crit_exit();
681 kfree((caddr_t)nfsd, M_NFSD);
682 nsd->nsd_nfsd = NULL;
683 if (--nfs_numnfsd == 0)
684 nfsrv_init(TRUE); /* Reinitialize everything */
685 return (error);
686 }
687
688 /*
689 * Shut down a socket associated with an nfssvc_sock structure.
690 * Should be called with the send lock set, if required.
691 * The trick here is to increment the sref at the start, so that the nfsds
692 * will stop using it and clear ns_flag at the end so that it will not be
693 * reassigned during cleanup.
694 */
695 static void
696 nfsrv_zapsock(struct nfssvc_sock *slp)
697 {
698 struct nfsuid *nuidp, *nnuidp;
699 struct nfsrv_descript *nwp, *nnwp;
700 struct socket *so;
701 struct file *fp;
702 struct nfsrv_rec *rec;
703
704 slp->ns_flag &= ~SLP_ALLFLAGS;
705 fp = slp->ns_fp;
706 if (fp) {
707 slp->ns_fp = NULL;
708 so = slp->ns_so;
709 so->so_rcv.ssb_flags &= ~SSB_UPCALL;
710 so->so_upcall = NULL;
711 so->so_upcallarg = NULL;
712 soshutdown(so, SHUT_RDWR);
713 closef(fp, NULL);
714 if (slp->ns_nam)
715 FREE(slp->ns_nam, M_SONAME);
716 m_freem(slp->ns_raw);
717 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) {
718 --slp->ns_numrec;
719 STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link);
720 if (rec->nr_address)
721 FREE(rec->nr_address, M_SONAME);
722 m_freem(rec->nr_packet);
723 kfree(rec, M_NFSRVDESC);
724 }
725 TAILQ_FOREACH_MUTABLE(nuidp, &slp->ns_uidlruhead, nu_lru,
726 nnuidp) {
727 LIST_REMOVE(nuidp, nu_hash);
728 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
729 if (nuidp->nu_flag & NU_NAM)
730 FREE(nuidp->nu_nam, M_SONAME);
731 kfree((caddr_t)nuidp, M_NFSUID);
732 }
733 crit_enter();
734 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
735 nnwp = nwp->nd_tq.le_next;
736 LIST_REMOVE(nwp, nd_tq);
737 kfree((caddr_t)nwp, M_NFSRVDESC);
738 }
739 LIST_INIT(&slp->ns_tq);
740 crit_exit();
741 }
742 }
743
744 /*
745 * Derefence a server socket structure. If it has no more references and
746 * is no longer valid, you can throw it away.
747 */
748 void
749 nfsrv_slpderef(struct nfssvc_sock *slp)
750 {
751 if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) {
752 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
753 kfree((caddr_t)slp, M_NFSSVC);
754 }
755 }
756
757 /*
758 * Lock a socket against others.
759 *
760 * Returns 0 on failure, 1 on success.
761 */
762 int
763 nfs_slplock(struct nfssvc_sock *slp, int wait)
764 {
765 mtx_t mtx = &slp->ns_solock;
766
767 if (wait) {
768 mtx_lock_ex(mtx, "nfsslplck", 0, 0);
769 return(1);
770 } else if (mtx_lock_ex_try(mtx) == 0) {
771 return(1);
772 } else {
773 return(0);
774 }
775 }
776
777 /*
778 * Unlock the stream socket for others.
779 */
780 void
781 nfs_slpunlock(struct nfssvc_sock *slp)
782 {
783 mtx_t mtx = &slp->ns_solock;
784
785 mtx_unlock(mtx);
786 }
787
788 /*
789 * Initialize the data structures for the server.
790 * Handshake with any new nfsds starting up to avoid any chance of
791 * corruption.
792 */
793 void
794 nfsrv_init(int terminating)
795 {
796 struct nfssvc_sock *slp, *nslp;
797
798 if (nfssvc_sockhead_flag & SLP_INIT)
799 panic("nfsd init");
800 nfssvc_sockhead_flag |= SLP_INIT;
801 if (terminating) {
802 TAILQ_FOREACH_MUTABLE(slp, &nfssvc_sockhead, ns_chain, nslp) {
803 if (slp->ns_flag & SLP_VALID)
804 nfsrv_zapsock(slp);
805 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
806 kfree((caddr_t)slp, M_NFSSVC);
807 }
808 nfsrv_cleancache(); /* And clear out server cache */
809 } else
810 nfs_pub.np_valid = 0;
811
812 TAILQ_INIT(&nfssvc_sockhead);
813 nfssvc_sockhead_flag &= ~SLP_INIT;
814 if (nfssvc_sockhead_flag & SLP_WANTINIT) {
815 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
816 wakeup((caddr_t)&nfssvc_sockhead);
817 }
818
819 TAILQ_INIT(&nfsd_head);
820 nfsd_head_flag &= ~NFSD_CHECKSLP;
821
822 #if 0
823 nfs_udpsock = (struct nfssvc_sock *)
824 kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
825 mtx_init(&nfs_udpsock->ns_solock);
826 STAILQ_INIT(&nfs_udpsock->ns_rec);
827 TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
828 TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
829
830 nfs_cltpsock = (struct nfssvc_sock *)
831 kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
832 mtx_init(&nfs_cltpsock->ns_solock);
833 STAILQ_INIT(&nfs_cltpsock->ns_rec);
834 TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
835 TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
836 #endif
837 }
838
839 /*
840 * Add entries to the server monitor log.
841 */
842 static void
843 nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep)
844 {
845 struct drt *rt;
846
847 rt = &nfsdrt.drt[nfsdrt.pos];
848 if (cacherep == RC_DOIT)
849 rt->flag = 0;
850 else if (cacherep == RC_REPLY)
851 rt->flag = DRT_CACHEREPLY;
852 else
853 rt->flag = DRT_CACHEDROP;
854 if (sotype == SOCK_STREAM)
855 rt->flag |= DRT_TCP;
856 if (nd->nd_flag & ND_NFSV3)
857 rt->flag |= DRT_NFSV3;
858 rt->proc = nd->nd_procnum;
859 if (nd->nd_nam->sa_family == AF_INET)
860 rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr;
861 else
862 rt->ipadr = INADDR_ANY;
863 rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec);
864 getmicrotime(&rt->tstamp);
865 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
866 }
867 #endif /* NFS_NOSERVER */
868
869 static int nfs_defect = 0;
870 SYSCTL_INT(_vfs_nfs, OID_AUTO, defect, CTLFLAG_RW, &nfs_defect, 0, "");
871
872 /*
873 * Get an authorization string for the uid by having the mount_nfs sitting
874 * on this mount point porpous out of the kernel and do it.
875 */
876 int
877 nfs_getauth(struct nfsmount *nmp, struct nfsreq *rep,
878 struct ucred *cred, char **auth_str, int *auth_len, char *verf_str,
879 int *verf_len, NFSKERBKEY_T key /* return session key */)
880 {
881 int error = 0;
882
883 while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) {
884 nmp->nm_state |= NFSSTA_WANTAUTH;
885 (void) tsleep((caddr_t)&nmp->nm_authtype, 0,
886 "nfsauth1", 2 * hz);
887 error = nfs_sigintr(nmp, rep, rep->r_td);
888 if (error) {
889 nmp->nm_state &= ~NFSSTA_WANTAUTH;
890 return (error);
891 }
892 }
893 nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH);
894 nmp->nm_authstr = *auth_str = (char *)kmalloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
895 nmp->nm_authlen = RPCAUTH_MAXSIZ;
896 nmp->nm_verfstr = verf_str;
897 nmp->nm_verflen = *verf_len;
898 nmp->nm_authuid = cred->cr_uid;
899 wakeup((caddr_t)&nmp->nm_authstr);
900
901 /*
902 * And wait for mount_nfs to do its stuff.
903 */
904 while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) {
905 (void) tsleep((caddr_t)&nmp->nm_authlen, 0,
906 "nfsauth2", 2 * hz);
907 error = nfs_sigintr(nmp, rep, rep->r_td);
908 }
909 if (nmp->nm_state & NFSSTA_AUTHERR) {
910 nmp->nm_state &= ~NFSSTA_AUTHERR;
911 error = EAUTH;
912 }
913 if (error)
914 kfree((caddr_t)*auth_str, M_TEMP);
915 else {
916 *auth_len = nmp->nm_authlen;
917 *verf_len = nmp->nm_verflen;
918 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key));
919 }
920 nmp->nm_state &= ~NFSSTA_HASAUTH;
921 nmp->nm_state |= NFSSTA_WAITAUTH;
922 if (nmp->nm_state & NFSSTA_WANTAUTH) {
923 nmp->nm_state &= ~NFSSTA_WANTAUTH;
924 wakeup((caddr_t)&nmp->nm_authtype);
925 }
926 return (error);
927 }
928
929 /*
930 * Get a nickname authenticator and verifier.
931 */
932 int
933 nfs_getnickauth(struct nfsmount *nmp, struct ucred *cred, char **auth_str,
934 int *auth_len, char *verf_str, int verf_len)
935 {
936 struct nfsuid *nuidp;
937 u_int32_t *nickp, *verfp;
938 struct timeval ktvin, ktvout;
939
940 #ifdef DIAGNOSTIC
941 if (verf_len < (4 * NFSX_UNSIGNED))
942 panic("nfs_getnickauth verf too small");
943 #endif
944 for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
945 nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
946 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
947 break;
948 }
949 if (!nuidp || nuidp->nu_expire < time_second)
950 return (EACCES);
951
952 /*
953 * Move to the end of the lru list (end of lru == most recently used).
954 */
955 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
956 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
957
958 nickp = (u_int32_t *)kmalloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
959 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
960 *nickp = txdr_unsigned(nuidp->nu_nickname);
961 *auth_str = (char *)nickp;
962 *auth_len = 2 * NFSX_UNSIGNED;
963
964 /*
965 * Now we must encrypt the verifier and package it up.
966 */
967 verfp = (u_int32_t *)verf_str;
968 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
969 if (time_second > nuidp->nu_timestamp.tv_sec ||
970 (time_second == nuidp->nu_timestamp.tv_sec &&
971 time_second > nuidp->nu_timestamp.tv_usec))
972 getmicrotime(&nuidp->nu_timestamp);
973 else
974 nuidp->nu_timestamp.tv_usec++;
975 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
976 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);
977
978 /*
979 * Now encrypt the timestamp verifier in ecb mode using the session
980 * key.
981 */
982 #ifdef NFSKERB
983 XXX
984 #else
985 ktvout.tv_sec = 0;
986 ktvout.tv_usec = 0;
987 #endif
988
989 *verfp++ = ktvout.tv_sec;
990 *verfp++ = ktvout.tv_usec;
991 *verfp = 0;
992 return (0);
993 }
994
995 /*
996 * Save the current nickname in a hash list entry on the mount point.
997 */
998 int
999 nfs_savenickauth(struct nfsmount *nmp, struct ucred *cred, int len,
1000 NFSKERBKEY_T key, struct mbuf **mdp, char **dposp,
1001 struct mbuf *mrep)
1002 {
1003 struct nfsuid *nuidp;
1004 u_int32_t *tl;
1005 struct timeval ktvin, ktvout;
1006 u_int32_t nick;
1007 int deltasec, error = 0;
1008 struct nfsm_info info;
1009
1010 info.md = *mdp;
1011 info.dpos = *dposp;
1012 info.mrep = mrep;
1013
1014 if (len == (3 * NFSX_UNSIGNED)) {
1015 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
1016 ktvin.tv_sec = *tl++;
1017 ktvin.tv_usec = *tl++;
1018 nick = fxdr_unsigned(u_int32_t, *tl);
1019
1020 /*
1021 * Decrypt the timestamp in ecb mode.
1022 */
1023 #ifdef NFSKERB
1024 XXX
1025 #else
1026 ktvout.tv_sec = 0;
1027 ktvout.tv_usec = 0;
1028 #endif
1029 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1030 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1031 deltasec = time_second - ktvout.tv_sec;
1032 if (deltasec < 0)
1033 deltasec = -deltasec;
1034 /*
1035 * If ok, add it to the hash list for the mount point.
1036 */
1037 if (deltasec <= NFS_KERBCLOCKSKEW) {
1038 if (nmp->nm_numuids < nuidhash_max) {
1039 nmp->nm_numuids++;
1040 nuidp = (struct nfsuid *)
1041 kmalloc(sizeof (struct nfsuid), M_NFSUID,
1042 M_WAITOK);
1043 } else {
1044 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead);
1045 LIST_REMOVE(nuidp, nu_hash);
1046 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1047 nu_lru);
1048 }
1049 nuidp->nu_flag = 0;
1050 nuidp->nu_cr.cr_uid = cred->cr_uid;
1051 nuidp->nu_expire = time_second + NFS_KERBTTL;
1052 nuidp->nu_timestamp = ktvout;
1053 nuidp->nu_nickname = nick;
1054 bcopy(key, nuidp->nu_key, sizeof (key));
1055 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1056 nu_lru);
1057 LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1058 nuidp, nu_hash);
1059 }
1060 } else {
1061 ERROROUT(nfsm_adv(&info, nfsm_rndup(len)));
1062 }
1063 nfsmout:
1064 *mdp = info.md;
1065 *dposp = info.dpos;
1066 return (error);
1067 }
DragonFly BSD