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 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 */
33
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD: releng/10.4/sys/fs/nfsclient/nfs_clport.c 321057 2017-07-16 19:36:44Z rmacklem $");
36
37 #include "opt_inet6.h"
38 #include "opt_kdtrace.h"
39
40 #include <sys/capsicum.h>
41
42 /*
43 * generally, I don't like #includes inside .h files, but it seems to
44 * be the easiest way to handle the port.
45 */
46 #include <sys/hash.h>
47 #include <fs/nfs/nfsport.h>
48 #include <netinet/if_ether.h>
49 #include <net/if_types.h>
50
51 #include <fs/nfsclient/nfs_kdtrace.h>
52
53 #ifdef KDTRACE_HOOKS
54 dtrace_nfsclient_attrcache_flush_probe_func_t
55 dtrace_nfscl_attrcache_flush_done_probe;
56 uint32_t nfscl_attrcache_flush_done_id;
57
58 dtrace_nfsclient_attrcache_get_hit_probe_func_t
59 dtrace_nfscl_attrcache_get_hit_probe;
60 uint32_t nfscl_attrcache_get_hit_id;
61
62 dtrace_nfsclient_attrcache_get_miss_probe_func_t
63 dtrace_nfscl_attrcache_get_miss_probe;
64 uint32_t nfscl_attrcache_get_miss_id;
65
66 dtrace_nfsclient_attrcache_load_probe_func_t
67 dtrace_nfscl_attrcache_load_done_probe;
68 uint32_t nfscl_attrcache_load_done_id;
69 #endif /* !KDTRACE_HOOKS */
70
71 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1;
72 extern struct vop_vector newnfs_vnodeops;
73 extern struct vop_vector newnfs_fifoops;
74 extern uma_zone_t newnfsnode_zone;
75 extern struct buf_ops buf_ops_newnfs;
76 extern int ncl_pbuf_freecnt;
77 extern short nfsv4_cbport;
78 extern int nfscl_enablecallb;
79 extern int nfs_numnfscbd;
80 extern int nfscl_inited;
81 struct mtx ncl_iod_mutex;
82 NFSDLOCKMUTEX;
83
84 extern void (*ncl_call_invalcaches)(struct vnode *);
85
86 /*
87 * Comparison function for vfs_hash functions.
88 */
89 int
90 newnfs_vncmpf(struct vnode *vp, void *arg)
91 {
92 struct nfsfh *nfhp = (struct nfsfh *)arg;
93 struct nfsnode *np = VTONFS(vp);
94
95 if (np->n_fhp->nfh_len != nfhp->nfh_len ||
96 NFSBCMP(np->n_fhp->nfh_fh, nfhp->nfh_fh, nfhp->nfh_len))
97 return (1);
98 return (0);
99 }
100
101 /*
102 * Look up a vnode/nfsnode by file handle.
103 * Callers must check for mount points!!
104 * In all cases, a pointer to a
105 * nfsnode structure is returned.
106 * This variant takes a "struct nfsfh *" as second argument and uses
107 * that structure up, either by hanging off the nfsnode or FREEing it.
108 */
109 int
110 nfscl_nget(struct mount *mntp, struct vnode *dvp, struct nfsfh *nfhp,
111 struct componentname *cnp, struct thread *td, struct nfsnode **npp,
112 void *stuff, int lkflags)
113 {
114 struct nfsnode *np, *dnp;
115 struct vnode *vp, *nvp;
116 struct nfsv4node *newd, *oldd;
117 int error;
118 u_int hash;
119 struct nfsmount *nmp;
120
121 nmp = VFSTONFS(mntp);
122 dnp = VTONFS(dvp);
123 *npp = NULL;
124
125 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len, FNV1_32_INIT);
126
127 error = vfs_hash_get(mntp, hash, lkflags,
128 td, &nvp, newnfs_vncmpf, nfhp);
129 if (error == 0 && nvp != NULL) {
130 /*
131 * I believe there is a slight chance that vgonel() could
132 * get called on this vnode between when NFSVOPLOCK() drops
133 * the VI_LOCK() and vget() acquires it again, so that it
134 * hasn't yet had v_usecount incremented. If this were to
135 * happen, the VI_DOOMED flag would be set, so check for
136 * that here. Since we now have the v_usecount incremented,
137 * we should be ok until we vrele() it, if the VI_DOOMED
138 * flag isn't set now.
139 */
140 VI_LOCK(nvp);
141 if ((nvp->v_iflag & VI_DOOMED)) {
142 VI_UNLOCK(nvp);
143 vrele(nvp);
144 error = ENOENT;
145 } else {
146 VI_UNLOCK(nvp);
147 }
148 }
149 if (error) {
150 FREE((caddr_t)nfhp, M_NFSFH);
151 return (error);
152 }
153 if (nvp != NULL) {
154 np = VTONFS(nvp);
155 /*
156 * For NFSv4, check to see if it is the same name and
157 * replace the name, if it is different.
158 */
159 oldd = newd = NULL;
160 if ((nmp->nm_flag & NFSMNT_NFSV4) && np->n_v4 != NULL &&
161 nvp->v_type == VREG &&
162 (np->n_v4->n4_namelen != cnp->cn_namelen ||
163 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4),
164 cnp->cn_namelen) ||
165 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
166 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
167 dnp->n_fhp->nfh_len))) {
168 MALLOC(newd, struct nfsv4node *,
169 sizeof (struct nfsv4node) + dnp->n_fhp->nfh_len +
170 + cnp->cn_namelen - 1, M_NFSV4NODE, M_WAITOK);
171 NFSLOCKNODE(np);
172 if (newd != NULL && np->n_v4 != NULL && nvp->v_type == VREG
173 && (np->n_v4->n4_namelen != cnp->cn_namelen ||
174 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4),
175 cnp->cn_namelen) ||
176 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
177 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
178 dnp->n_fhp->nfh_len))) {
179 oldd = np->n_v4;
180 np->n_v4 = newd;
181 newd = NULL;
182 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len;
183 np->n_v4->n4_namelen = cnp->cn_namelen;
184 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
185 dnp->n_fhp->nfh_len);
186 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4),
187 cnp->cn_namelen);
188 }
189 NFSUNLOCKNODE(np);
190 }
191 if (newd != NULL)
192 FREE((caddr_t)newd, M_NFSV4NODE);
193 if (oldd != NULL)
194 FREE((caddr_t)oldd, M_NFSV4NODE);
195 *npp = np;
196 FREE((caddr_t)nfhp, M_NFSFH);
197 return (0);
198 }
199 np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO);
200
201 error = getnewvnode(nfs_vnode_tag, mntp, &newnfs_vnodeops, &nvp);
202 if (error) {
203 uma_zfree(newnfsnode_zone, np);
204 FREE((caddr_t)nfhp, M_NFSFH);
205 return (error);
206 }
207 vp = nvp;
208 KASSERT(vp->v_bufobj.bo_bsize != 0, ("nfscl_nget: bo_bsize == 0"));
209 vp->v_bufobj.bo_ops = &buf_ops_newnfs;
210 vp->v_data = np;
211 np->n_vnode = vp;
212 /*
213 * Initialize the mutex even if the vnode is going to be a loser.
214 * This simplifies the logic in reclaim, which can then unconditionally
215 * destroy the mutex (in the case of the loser, or if hash_insert
216 * happened to return an error no special casing is needed).
217 */
218 mtx_init(&np->n_mtx, "NEWNFSnode lock", NULL, MTX_DEF | MTX_DUPOK);
219
220 /*
221 * Are we getting the root? If so, make sure the vnode flags
222 * are correct
223 */
224 if ((nfhp->nfh_len == nmp->nm_fhsize) &&
225 !bcmp(nfhp->nfh_fh, nmp->nm_fh, nfhp->nfh_len)) {
226 if (vp->v_type == VNON)
227 vp->v_type = VDIR;
228 vp->v_vflag |= VV_ROOT;
229 }
230
231 np->n_fhp = nfhp;
232 /*
233 * For NFSv4, we have to attach the directory file handle and
234 * file name, so that Open Ops can be done later.
235 */
236 if (nmp->nm_flag & NFSMNT_NFSV4) {
237 MALLOC(np->n_v4, struct nfsv4node *, sizeof (struct nfsv4node)
238 + dnp->n_fhp->nfh_len + cnp->cn_namelen - 1, M_NFSV4NODE,
239 M_WAITOK);
240 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len;
241 np->n_v4->n4_namelen = cnp->cn_namelen;
242 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
243 dnp->n_fhp->nfh_len);
244 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4),
245 cnp->cn_namelen);
246 } else {
247 np->n_v4 = NULL;
248 }
249
250 /*
251 * NFS supports recursive and shared locking.
252 */
253 lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL);
254 VN_LOCK_AREC(vp);
255 VN_LOCK_ASHARE(vp);
256 error = insmntque(vp, mntp);
257 if (error != 0) {
258 *npp = NULL;
259 mtx_destroy(&np->n_mtx);
260 FREE((caddr_t)nfhp, M_NFSFH);
261 if (np->n_v4 != NULL)
262 FREE((caddr_t)np->n_v4, M_NFSV4NODE);
263 uma_zfree(newnfsnode_zone, np);
264 return (error);
265 }
266 error = vfs_hash_insert(vp, hash, lkflags,
267 td, &nvp, newnfs_vncmpf, nfhp);
268 if (error)
269 return (error);
270 if (nvp != NULL) {
271 *npp = VTONFS(nvp);
272 /* vfs_hash_insert() vput()'s the losing vnode */
273 return (0);
274 }
275 *npp = np;
276
277 return (0);
278 }
279
280 /*
281 * Another variant of nfs_nget(). This one is only used by reopen. It
282 * takes almost the same args as nfs_nget(), but only succeeds if an entry
283 * exists in the cache. (Since files should already be "open" with a
284 * vnode ref cnt on the node when reopen calls this, it should always
285 * succeed.)
286 * Also, don't get a vnode lock, since it may already be locked by some
287 * other process that is handling it. This is ok, since all other threads
288 * on the client are blocked by the nfsc_lock being exclusively held by the
289 * caller of this function.
290 */
291 int
292 nfscl_ngetreopen(struct mount *mntp, u_int8_t *fhp, int fhsize,
293 struct thread *td, struct nfsnode **npp)
294 {
295 struct vnode *nvp;
296 u_int hash;
297 struct nfsfh *nfhp;
298 int error;
299
300 *npp = NULL;
301 /* For forced dismounts, just return error. */
302 if ((mntp->mnt_kern_flag & MNTK_UNMOUNTF))
303 return (EINTR);
304 MALLOC(nfhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize,
305 M_NFSFH, M_WAITOK);
306 bcopy(fhp, &nfhp->nfh_fh[0], fhsize);
307 nfhp->nfh_len = fhsize;
308
309 hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT);
310
311 /*
312 * First, try to get the vnode locked, but don't block for the lock.
313 */
314 error = vfs_hash_get(mntp, hash, (LK_EXCLUSIVE | LK_NOWAIT), td, &nvp,
315 newnfs_vncmpf, nfhp);
316 if (error == 0 && nvp != NULL) {
317 NFSVOPUNLOCK(nvp, 0);
318 } else if (error == EBUSY) {
319 /*
320 * It is safe so long as a vflush() with
321 * FORCECLOSE has not been done. Since the Renew thread is
322 * stopped and the MNTK_UNMOUNTF flag is set before doing
323 * a vflush() with FORCECLOSE, we should be ok here.
324 */
325 if ((mntp->mnt_kern_flag & MNTK_UNMOUNTF))
326 error = EINTR;
327 else {
328 vfs_hash_ref(mntp, hash, td, &nvp, newnfs_vncmpf, nfhp);
329 if (nvp == NULL) {
330 error = ENOENT;
331 } else if ((nvp->v_iflag & VI_DOOMED) != 0) {
332 error = ENOENT;
333 vrele(nvp);
334 } else {
335 error = 0;
336 }
337 }
338 }
339 FREE(nfhp, M_NFSFH);
340 if (error)
341 return (error);
342 if (nvp != NULL) {
343 *npp = VTONFS(nvp);
344 return (0);
345 }
346 return (EINVAL);
347 }
348
349 /*
350 * Load the attribute cache (that lives in the nfsnode entry) with
351 * the attributes of the second argument and
352 * Iff vaper not NULL
353 * copy the attributes to *vaper
354 * Similar to nfs_loadattrcache(), except the attributes are passed in
355 * instead of being parsed out of the mbuf list.
356 */
357 int
358 nfscl_loadattrcache(struct vnode **vpp, struct nfsvattr *nap, void *nvaper,
359 void *stuff, int writeattr, int dontshrink)
360 {
361 struct vnode *vp = *vpp;
362 struct vattr *vap, *nvap = &nap->na_vattr, *vaper = nvaper;
363 struct nfsnode *np;
364 struct nfsmount *nmp;
365 struct timespec mtime_save;
366 u_quad_t nsize;
367 int setnsize;
368
369 /*
370 * If v_type == VNON it is a new node, so fill in the v_type,
371 * n_mtime fields. Check to see if it represents a special
372 * device, and if so, check for a possible alias. Once the
373 * correct vnode has been obtained, fill in the rest of the
374 * information.
375 */
376 np = VTONFS(vp);
377 NFSLOCKNODE(np);
378 if (vp->v_type != nvap->va_type) {
379 vp->v_type = nvap->va_type;
380 if (vp->v_type == VFIFO)
381 vp->v_op = &newnfs_fifoops;
382 np->n_mtime = nvap->va_mtime;
383 }
384 nmp = VFSTONFS(vp->v_mount);
385 vap = &np->n_vattr.na_vattr;
386 mtime_save = vap->va_mtime;
387 if (writeattr) {
388 np->n_vattr.na_filerev = nap->na_filerev;
389 np->n_vattr.na_size = nap->na_size;
390 np->n_vattr.na_mtime = nap->na_mtime;
391 np->n_vattr.na_ctime = nap->na_ctime;
392 np->n_vattr.na_fsid = nap->na_fsid;
393 np->n_vattr.na_mode = nap->na_mode;
394 } else {
395 NFSBCOPY((caddr_t)nap, (caddr_t)&np->n_vattr,
396 sizeof (struct nfsvattr));
397 }
398
399 /*
400 * For NFSv4, if the node's fsid is not equal to the mount point's
401 * fsid, return the low order 32bits of the node's fsid. This
402 * allows getcwd(3) to work. There is a chance that the fsid might
403 * be the same as a local fs, but since this is in an NFS mount
404 * point, I don't think that will cause any problems?
405 */
406 if (NFSHASNFSV4(nmp) && NFSHASHASSETFSID(nmp) &&
407 (nmp->nm_fsid[0] != np->n_vattr.na_filesid[0] ||
408 nmp->nm_fsid[1] != np->n_vattr.na_filesid[1])) {
409 /*
410 * va_fsid needs to be set to some value derived from
411 * np->n_vattr.na_filesid that is not equal
412 * vp->v_mount->mnt_stat.f_fsid[0], so that it changes
413 * from the value used for the top level server volume
414 * in the mounted subtree.
415 */
416 if (vp->v_mount->mnt_stat.f_fsid.val[0] !=
417 (uint32_t)np->n_vattr.na_filesid[0])
418 vap->va_fsid = (uint32_t)np->n_vattr.na_filesid[0];
419 else
420 vap->va_fsid = (uint32_t)hash32_buf(
421 np->n_vattr.na_filesid, 2 * sizeof(uint64_t), 0);
422 } else
423 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
424 np->n_attrstamp = time_second;
425 setnsize = 0;
426 nsize = 0;
427 if (vap->va_size != np->n_size) {
428 if (vap->va_type == VREG) {
429 if (dontshrink && vap->va_size < np->n_size) {
430 /*
431 * We've been told not to shrink the file;
432 * zero np->n_attrstamp to indicate that
433 * the attributes are stale.
434 */
435 vap->va_size = np->n_size;
436 np->n_attrstamp = 0;
437 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
438 vnode_pager_setsize(vp, np->n_size);
439 } else if (np->n_flag & NMODIFIED) {
440 /*
441 * We've modified the file: Use the larger
442 * of our size, and the server's size.
443 */
444 if (vap->va_size < np->n_size) {
445 vap->va_size = np->n_size;
446 } else {
447 np->n_size = vap->va_size;
448 np->n_flag |= NSIZECHANGED;
449 }
450 vnode_pager_setsize(vp, np->n_size);
451 } else if (vap->va_size < np->n_size) {
452 /*
453 * When shrinking the size, the call to
454 * vnode_pager_setsize() cannot be done
455 * with the mutex held, so delay it until
456 * after the mtx_unlock call.
457 */
458 nsize = np->n_size = vap->va_size;
459 np->n_flag |= NSIZECHANGED;
460 setnsize = 1;
461 } else {
462 np->n_size = vap->va_size;
463 np->n_flag |= NSIZECHANGED;
464 vnode_pager_setsize(vp, np->n_size);
465 }
466 } else {
467 np->n_size = vap->va_size;
468 }
469 }
470 /*
471 * The following checks are added to prevent a race between (say)
472 * a READDIR+ and a WRITE.
473 * READDIR+, WRITE requests sent out.
474 * READDIR+ resp, WRITE resp received on client.
475 * However, the WRITE resp was handled before the READDIR+ resp
476 * causing the post op attrs from the write to be loaded first
477 * and the attrs from the READDIR+ to be loaded later. If this
478 * happens, we have stale attrs loaded into the attrcache.
479 * We detect this by for the mtime moving back. We invalidate the
480 * attrcache when this happens.
481 */
482 if (timespeccmp(&mtime_save, &vap->va_mtime, >)) {
483 /* Size changed or mtime went backwards */
484 np->n_attrstamp = 0;
485 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
486 }
487 if (vaper != NULL) {
488 NFSBCOPY((caddr_t)vap, (caddr_t)vaper, sizeof(*vap));
489 if (np->n_flag & NCHG) {
490 if (np->n_flag & NACC)
491 vaper->va_atime = np->n_atim;
492 if (np->n_flag & NUPD)
493 vaper->va_mtime = np->n_mtim;
494 }
495 }
496 #ifdef KDTRACE_HOOKS
497 if (np->n_attrstamp != 0)
498 KDTRACE_NFS_ATTRCACHE_LOAD_DONE(vp, vap, 0);
499 #endif
500 NFSUNLOCKNODE(np);
501 if (setnsize)
502 vnode_pager_setsize(vp, nsize);
503 return (0);
504 }
505
506 /*
507 * Fill in the client id name. For these bytes:
508 * 1 - they must be unique
509 * 2 - they should be persistent across client reboots
510 * 1 is more critical than 2
511 * Use the mount point's unique id plus either the uuid or, if that
512 * isn't set, random junk.
513 */
514 void
515 nfscl_fillclid(u_int64_t clval, char *uuid, u_int8_t *cp, u_int16_t idlen)
516 {
517 int uuidlen;
518
519 /*
520 * First, put in the 64bit mount point identifier.
521 */
522 if (idlen >= sizeof (u_int64_t)) {
523 NFSBCOPY((caddr_t)&clval, cp, sizeof (u_int64_t));
524 cp += sizeof (u_int64_t);
525 idlen -= sizeof (u_int64_t);
526 }
527
528 /*
529 * If uuid is non-zero length, use it.
530 */
531 uuidlen = strlen(uuid);
532 if (uuidlen > 0 && idlen >= uuidlen) {
533 NFSBCOPY(uuid, cp, uuidlen);
534 cp += uuidlen;
535 idlen -= uuidlen;
536 }
537
538 /*
539 * This only normally happens if the uuid isn't set.
540 */
541 while (idlen > 0) {
542 *cp++ = (u_int8_t)(arc4random() % 256);
543 idlen--;
544 }
545 }
546
547 /*
548 * Fill in a lock owner name. For now, pid + the process's creation time.
549 */
550 void
551 nfscl_filllockowner(void *id, u_int8_t *cp, int flags)
552 {
553 union {
554 u_int32_t lval;
555 u_int8_t cval[4];
556 } tl;
557 struct proc *p;
558
559 if (id == NULL) {
560 /* Return the single open_owner of all 0 bytes. */
561 bzero(cp, NFSV4CL_LOCKNAMELEN);
562 return;
563 }
564 if ((flags & F_POSIX) != 0) {
565 p = (struct proc *)id;
566 tl.lval = p->p_pid;
567 *cp++ = tl.cval[0];
568 *cp++ = tl.cval[1];
569 *cp++ = tl.cval[2];
570 *cp++ = tl.cval[3];
571 tl.lval = p->p_stats->p_start.tv_sec;
572 *cp++ = tl.cval[0];
573 *cp++ = tl.cval[1];
574 *cp++ = tl.cval[2];
575 *cp++ = tl.cval[3];
576 tl.lval = p->p_stats->p_start.tv_usec;
577 *cp++ = tl.cval[0];
578 *cp++ = tl.cval[1];
579 *cp++ = tl.cval[2];
580 *cp = tl.cval[3];
581 } else if ((flags & F_FLOCK) != 0) {
582 bcopy(&id, cp, sizeof(id));
583 bzero(&cp[sizeof(id)], NFSV4CL_LOCKNAMELEN - sizeof(id));
584 } else {
585 printf("nfscl_filllockowner: not F_POSIX or F_FLOCK\n");
586 bzero(cp, NFSV4CL_LOCKNAMELEN);
587 }
588 }
589
590 /*
591 * Find the parent process for the thread passed in as an argument.
592 * If none exists, return NULL, otherwise return a thread for the parent.
593 * (Can be any of the threads, since it is only used for td->td_proc.)
594 */
595 NFSPROC_T *
596 nfscl_getparent(struct thread *td)
597 {
598 struct proc *p;
599 struct thread *ptd;
600
601 if (td == NULL)
602 return (NULL);
603 p = td->td_proc;
604 if (p->p_pid == 0)
605 return (NULL);
606 p = p->p_pptr;
607 if (p == NULL)
608 return (NULL);
609 ptd = TAILQ_FIRST(&p->p_threads);
610 return (ptd);
611 }
612
613 /*
614 * Start up the renew kernel thread.
615 */
616 static void
617 start_nfscl(void *arg)
618 {
619 struct nfsclclient *clp;
620 struct thread *td;
621
622 clp = (struct nfsclclient *)arg;
623 td = TAILQ_FIRST(&clp->nfsc_renewthread->p_threads);
624 nfscl_renewthread(clp, td);
625 kproc_exit(0);
626 }
627
628 void
629 nfscl_start_renewthread(struct nfsclclient *clp)
630 {
631
632 kproc_create(start_nfscl, (void *)clp, &clp->nfsc_renewthread, 0, 0,
633 "nfscl");
634 }
635
636 /*
637 * Handle wcc_data.
638 * For NFSv4, it assumes that nfsv4_wccattr() was used to set up the getattr
639 * as the first Op after PutFH.
640 * (For NFSv4, the postop attributes are after the Op, so they can't be
641 * parsed here. A separate call to nfscl_postop_attr() is required.)
642 */
643 int
644 nfscl_wcc_data(struct nfsrv_descript *nd, struct vnode *vp,
645 struct nfsvattr *nap, int *flagp, int *wccflagp, void *stuff)
646 {
647 u_int32_t *tl;
648 struct nfsnode *np = VTONFS(vp);
649 struct nfsvattr nfsva;
650 int error = 0;
651
652 if (wccflagp != NULL)
653 *wccflagp = 0;
654 if (nd->nd_flag & ND_NFSV3) {
655 *flagp = 0;
656 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
657 if (*tl == newnfs_true) {
658 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
659 if (wccflagp != NULL) {
660 mtx_lock(&np->n_mtx);
661 *wccflagp = (np->n_mtime.tv_sec ==
662 fxdr_unsigned(u_int32_t, *(tl + 2)) &&
663 np->n_mtime.tv_nsec ==
664 fxdr_unsigned(u_int32_t, *(tl + 3)));
665 mtx_unlock(&np->n_mtx);
666 }
667 }
668 error = nfscl_postop_attr(nd, nap, flagp, stuff);
669 if (wccflagp != NULL && *flagp == 0)
670 *wccflagp = 0;
671 } else if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR))
672 == (ND_NFSV4 | ND_V4WCCATTR)) {
673 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL,
674 NULL, 0, NULL, NULL, NULL, NULL, NULL, 0,
675 NULL, NULL, NULL, NULL, NULL);
676 if (error)
677 return (error);
678 /*
679 * Get rid of Op# and status for next op.
680 */
681 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
682 if (*++tl)
683 nd->nd_flag |= ND_NOMOREDATA;
684 if (wccflagp != NULL &&
685 nfsva.na_vattr.va_mtime.tv_sec != 0) {
686 mtx_lock(&np->n_mtx);
687 *wccflagp = (np->n_mtime.tv_sec ==
688 nfsva.na_vattr.va_mtime.tv_sec &&
689 np->n_mtime.tv_nsec ==
690 nfsva.na_vattr.va_mtime.tv_sec);
691 mtx_unlock(&np->n_mtx);
692 }
693 }
694 nfsmout:
695 return (error);
696 }
697
698 /*
699 * Get postop attributes.
700 */
701 int
702 nfscl_postop_attr(struct nfsrv_descript *nd, struct nfsvattr *nap, int *retp,
703 void *stuff)
704 {
705 u_int32_t *tl;
706 int error = 0;
707
708 *retp = 0;
709 if (nd->nd_flag & ND_NOMOREDATA)
710 return (error);
711 if (nd->nd_flag & ND_NFSV3) {
712 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
713 *retp = fxdr_unsigned(int, *tl);
714 } else if (nd->nd_flag & ND_NFSV4) {
715 /*
716 * For NFSv4, the postop attr are at the end, so no point
717 * in looking if nd_repstat != 0.
718 */
719 if (!nd->nd_repstat) {
720 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
721 if (*(tl + 1))
722 /* should never happen since nd_repstat != 0 */
723 nd->nd_flag |= ND_NOMOREDATA;
724 else
725 *retp = 1;
726 }
727 } else if (!nd->nd_repstat) {
728 /* For NFSv2, the attributes are here iff nd_repstat == 0 */
729 *retp = 1;
730 }
731 if (*retp) {
732 error = nfsm_loadattr(nd, nap);
733 if (error)
734 *retp = 0;
735 }
736 nfsmout:
737 return (error);
738 }
739
740 /*
741 * Fill in the setable attributes. The full argument indicates whether
742 * to fill in them all or just mode and time.
743 */
744 void
745 nfscl_fillsattr(struct nfsrv_descript *nd, struct vattr *vap,
746 struct vnode *vp, int flags, u_int32_t rdev)
747 {
748 u_int32_t *tl;
749 struct nfsv2_sattr *sp;
750 nfsattrbit_t attrbits;
751
752 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) {
753 case ND_NFSV2:
754 NFSM_BUILD(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
755 if (vap->va_mode == (mode_t)VNOVAL)
756 sp->sa_mode = newnfs_xdrneg1;
757 else
758 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
759 if (vap->va_uid == (uid_t)VNOVAL)
760 sp->sa_uid = newnfs_xdrneg1;
761 else
762 sp->sa_uid = txdr_unsigned(vap->va_uid);
763 if (vap->va_gid == (gid_t)VNOVAL)
764 sp->sa_gid = newnfs_xdrneg1;
765 else
766 sp->sa_gid = txdr_unsigned(vap->va_gid);
767 if (flags & NFSSATTR_SIZE0)
768 sp->sa_size = 0;
769 else if (flags & NFSSATTR_SIZENEG1)
770 sp->sa_size = newnfs_xdrneg1;
771 else if (flags & NFSSATTR_SIZERDEV)
772 sp->sa_size = txdr_unsigned(rdev);
773 else
774 sp->sa_size = txdr_unsigned(vap->va_size);
775 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
776 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
777 break;
778 case ND_NFSV3:
779 if (vap->va_mode != (mode_t)VNOVAL) {
780 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
781 *tl++ = newnfs_true;
782 *tl = txdr_unsigned(vap->va_mode);
783 } else {
784 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
785 *tl = newnfs_false;
786 }
787 if ((flags & NFSSATTR_FULL) && vap->va_uid != (uid_t)VNOVAL) {
788 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
789 *tl++ = newnfs_true;
790 *tl = txdr_unsigned(vap->va_uid);
791 } else {
792 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
793 *tl = newnfs_false;
794 }
795 if ((flags & NFSSATTR_FULL) && vap->va_gid != (gid_t)VNOVAL) {
796 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
797 *tl++ = newnfs_true;
798 *tl = txdr_unsigned(vap->va_gid);
799 } else {
800 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
801 *tl = newnfs_false;
802 }
803 if ((flags & NFSSATTR_FULL) && vap->va_size != VNOVAL) {
804 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
805 *tl++ = newnfs_true;
806 txdr_hyper(vap->va_size, tl);
807 } else {
808 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
809 *tl = newnfs_false;
810 }
811 if (vap->va_atime.tv_sec != VNOVAL) {
812 if ((vap->va_vaflags & VA_UTIMES_NULL) == 0) {
813 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
814 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);
815 txdr_nfsv3time(&vap->va_atime, tl);
816 } else {
817 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
818 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER);
819 }
820 } else {
821 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
822 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);
823 }
824 if (vap->va_mtime.tv_sec != VNOVAL) {
825 if ((vap->va_vaflags & VA_UTIMES_NULL) == 0) {
826 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
827 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);
828 txdr_nfsv3time(&vap->va_mtime, tl);
829 } else {
830 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
831 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER);
832 }
833 } else {
834 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
835 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);
836 }
837 break;
838 case ND_NFSV4:
839 NFSZERO_ATTRBIT(&attrbits);
840 if (vap->va_mode != (mode_t)VNOVAL)
841 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_MODE);
842 if ((flags & NFSSATTR_FULL) && vap->va_uid != (uid_t)VNOVAL)
843 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNER);
844 if ((flags & NFSSATTR_FULL) && vap->va_gid != (gid_t)VNOVAL)
845 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNERGROUP);
846 if ((flags & NFSSATTR_FULL) && vap->va_size != VNOVAL)
847 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE);
848 if (vap->va_atime.tv_sec != VNOVAL)
849 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESSSET);
850 if (vap->va_mtime.tv_sec != VNOVAL)
851 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFYSET);
852 (void) nfsv4_fillattr(nd, vp->v_mount, vp, NULL, vap, NULL, 0,
853 &attrbits, NULL, NULL, 0, 0, 0, 0, (uint64_t)0);
854 break;
855 };
856 }
857
858 /*
859 * nfscl_request() - mostly a wrapper for newnfs_request().
860 */
861 int
862 nfscl_request(struct nfsrv_descript *nd, struct vnode *vp, NFSPROC_T *p,
863 struct ucred *cred, void *stuff)
864 {
865 int ret, vers;
866 struct nfsmount *nmp;
867
868 nmp = VFSTONFS(vp->v_mount);
869 if (nd->nd_flag & ND_NFSV4)
870 vers = NFS_VER4;
871 else if (nd->nd_flag & ND_NFSV3)
872 vers = NFS_VER3;
873 else
874 vers = NFS_VER2;
875 ret = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred,
876 NFS_PROG, vers, NULL, 1, NULL, NULL);
877 return (ret);
878 }
879
880 /*
881 * fill in this bsden's variant of statfs using nfsstatfs.
882 */
883 void
884 nfscl_loadsbinfo(struct nfsmount *nmp, struct nfsstatfs *sfp, void *statfs)
885 {
886 struct statfs *sbp = (struct statfs *)statfs;
887
888 if (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) {
889 sbp->f_bsize = NFS_FABLKSIZE;
890 sbp->f_blocks = sfp->sf_tbytes / NFS_FABLKSIZE;
891 sbp->f_bfree = sfp->sf_fbytes / NFS_FABLKSIZE;
892 /*
893 * Although sf_abytes is uint64_t and f_bavail is int64_t,
894 * the value after dividing by NFS_FABLKSIZE is small
895 * enough that it will fit in 63bits, so it is ok to
896 * assign it to f_bavail without fear that it will become
897 * negative.
898 */
899 sbp->f_bavail = sfp->sf_abytes / NFS_FABLKSIZE;
900 sbp->f_files = sfp->sf_tfiles;
901 /* Since f_ffree is int64_t, clip it to 63bits. */
902 if (sfp->sf_ffiles > INT64_MAX)
903 sbp->f_ffree = INT64_MAX;
904 else
905 sbp->f_ffree = sfp->sf_ffiles;
906 } else if ((nmp->nm_flag & NFSMNT_NFSV4) == 0) {
907 /*
908 * The type casts to (int32_t) ensure that this code is
909 * compatible with the old NFS client, in that it will
910 * propagate bit31 to the high order bits. This may or may
911 * not be correct for NFSv2, but since it is a legacy
912 * environment, I'd rather retain backwards compatibility.
913 */
914 sbp->f_bsize = (int32_t)sfp->sf_bsize;
915 sbp->f_blocks = (int32_t)sfp->sf_blocks;
916 sbp->f_bfree = (int32_t)sfp->sf_bfree;
917 sbp->f_bavail = (int32_t)sfp->sf_bavail;
918 sbp->f_files = 0;
919 sbp->f_ffree = 0;
920 }
921 }
922
923 /*
924 * Use the fsinfo stuff to update the mount point.
925 */
926 void
927 nfscl_loadfsinfo(struct nfsmount *nmp, struct nfsfsinfo *fsp)
928 {
929
930 if ((nmp->nm_wsize == 0 || fsp->fs_wtpref < nmp->nm_wsize) &&
931 fsp->fs_wtpref >= NFS_FABLKSIZE)
932 nmp->nm_wsize = (fsp->fs_wtpref + NFS_FABLKSIZE - 1) &
933 ~(NFS_FABLKSIZE - 1);
934 if (fsp->fs_wtmax < nmp->nm_wsize && fsp->fs_wtmax > 0) {
935 nmp->nm_wsize = fsp->fs_wtmax & ~(NFS_FABLKSIZE - 1);
936 if (nmp->nm_wsize == 0)
937 nmp->nm_wsize = fsp->fs_wtmax;
938 }
939 if (nmp->nm_wsize < NFS_FABLKSIZE)
940 nmp->nm_wsize = NFS_FABLKSIZE;
941 if ((nmp->nm_rsize == 0 || fsp->fs_rtpref < nmp->nm_rsize) &&
942 fsp->fs_rtpref >= NFS_FABLKSIZE)
943 nmp->nm_rsize = (fsp->fs_rtpref + NFS_FABLKSIZE - 1) &
944 ~(NFS_FABLKSIZE - 1);
945 if (fsp->fs_rtmax < nmp->nm_rsize && fsp->fs_rtmax > 0) {
946 nmp->nm_rsize = fsp->fs_rtmax & ~(NFS_FABLKSIZE - 1);
947 if (nmp->nm_rsize == 0)
948 nmp->nm_rsize = fsp->fs_rtmax;
949 }
950 if (nmp->nm_rsize < NFS_FABLKSIZE)
951 nmp->nm_rsize = NFS_FABLKSIZE;
952 if ((nmp->nm_readdirsize == 0 || fsp->fs_dtpref < nmp->nm_readdirsize)
953 && fsp->fs_dtpref >= NFS_DIRBLKSIZ)
954 nmp->nm_readdirsize = (fsp->fs_dtpref + NFS_DIRBLKSIZ - 1) &
955 ~(NFS_DIRBLKSIZ - 1);
956 if (fsp->fs_rtmax < nmp->nm_readdirsize && fsp->fs_rtmax > 0) {
957 nmp->nm_readdirsize = fsp->fs_rtmax & ~(NFS_DIRBLKSIZ - 1);
958 if (nmp->nm_readdirsize == 0)
959 nmp->nm_readdirsize = fsp->fs_rtmax;
960 }
961 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ)
962 nmp->nm_readdirsize = NFS_DIRBLKSIZ;
963 if (fsp->fs_maxfilesize > 0 &&
964 fsp->fs_maxfilesize < nmp->nm_maxfilesize)
965 nmp->nm_maxfilesize = fsp->fs_maxfilesize;
966 nmp->nm_mountp->mnt_stat.f_iosize = newnfs_iosize(nmp);
967 nmp->nm_state |= NFSSTA_GOTFSINFO;
968 }
969
970 /*
971 * Get a pointer to my IP addrress and return it.
972 * Return NULL if you can't find one.
973 */
974 u_int8_t *
975 nfscl_getmyip(struct nfsmount *nmp, int *isinet6p)
976 {
977 struct sockaddr_in sad, *sin;
978 struct rtentry *rt;
979 u_int8_t *retp = NULL;
980 static struct in_addr laddr;
981
982 *isinet6p = 0;
983 /*
984 * Loop up a route for the destination address.
985 */
986 if (nmp->nm_nam->sa_family == AF_INET) {
987 bzero(&sad, sizeof (sad));
988 sin = (struct sockaddr_in *)nmp->nm_nam;
989 sad.sin_family = AF_INET;
990 sad.sin_len = sizeof (struct sockaddr_in);
991 sad.sin_addr.s_addr = sin->sin_addr.s_addr;
992 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred));
993 rt = rtalloc1_fib((struct sockaddr *)&sad, 0, 0UL,
994 curthread->td_proc->p_fibnum);
995 if (rt != NULL) {
996 if (rt->rt_ifp != NULL &&
997 rt->rt_ifa != NULL &&
998 ((rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) &&
999 rt->rt_ifa->ifa_addr->sa_family == AF_INET) {
1000 sin = (struct sockaddr_in *)
1001 rt->rt_ifa->ifa_addr;
1002 laddr.s_addr = sin->sin_addr.s_addr;
1003 retp = (u_int8_t *)&laddr;
1004 }
1005 RTFREE_LOCKED(rt);
1006 }
1007 CURVNET_RESTORE();
1008 #ifdef INET6
1009 } else if (nmp->nm_nam->sa_family == AF_INET6) {
1010 struct sockaddr_in6 sad6, *sin6;
1011 static struct in6_addr laddr6;
1012
1013 bzero(&sad6, sizeof (sad6));
1014 sin6 = (struct sockaddr_in6 *)nmp->nm_nam;
1015 sad6.sin6_family = AF_INET6;
1016 sad6.sin6_len = sizeof (struct sockaddr_in6);
1017 sad6.sin6_addr = sin6->sin6_addr;
1018 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred));
1019 rt = rtalloc1_fib((struct sockaddr *)&sad6, 0, 0UL,
1020 curthread->td_proc->p_fibnum);
1021 if (rt != NULL) {
1022 if (rt->rt_ifp != NULL &&
1023 rt->rt_ifa != NULL &&
1024 ((rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) &&
1025 rt->rt_ifa->ifa_addr->sa_family == AF_INET6) {
1026 sin6 = (struct sockaddr_in6 *)
1027 rt->rt_ifa->ifa_addr;
1028 laddr6 = sin6->sin6_addr;
1029 retp = (u_int8_t *)&laddr6;
1030 *isinet6p = 1;
1031 }
1032 RTFREE_LOCKED(rt);
1033 }
1034 CURVNET_RESTORE();
1035 #endif
1036 }
1037 return (retp);
1038 }
1039
1040 /*
1041 * Copy NFS uid, gids from the cred structure.
1042 */
1043 void
1044 newnfs_copyincred(struct ucred *cr, struct nfscred *nfscr)
1045 {
1046 int i;
1047
1048 KASSERT(cr->cr_ngroups >= 0,
1049 ("newnfs_copyincred: negative cr_ngroups"));
1050 nfscr->nfsc_uid = cr->cr_uid;
1051 nfscr->nfsc_ngroups = MIN(cr->cr_ngroups, NFS_MAXGRPS + 1);
1052 for (i = 0; i < nfscr->nfsc_ngroups; i++)
1053 nfscr->nfsc_groups[i] = cr->cr_groups[i];
1054 }
1055
1056
1057 /*
1058 * Do any client specific initialization.
1059 */
1060 void
1061 nfscl_init(void)
1062 {
1063 static int inited = 0;
1064
1065 if (inited)
1066 return;
1067 inited = 1;
1068 nfscl_inited = 1;
1069 ncl_pbuf_freecnt = nswbuf / 2 + 1;
1070 }
1071
1072 /*
1073 * Check each of the attributes to be set, to ensure they aren't already
1074 * the correct value. Disable setting ones already correct.
1075 */
1076 int
1077 nfscl_checksattr(struct vattr *vap, struct nfsvattr *nvap)
1078 {
1079
1080 if (vap->va_mode != (mode_t)VNOVAL) {
1081 if (vap->va_mode == nvap->na_mode)
1082 vap->va_mode = (mode_t)VNOVAL;
1083 }
1084 if (vap->va_uid != (uid_t)VNOVAL) {
1085 if (vap->va_uid == nvap->na_uid)
1086 vap->va_uid = (uid_t)VNOVAL;
1087 }
1088 if (vap->va_gid != (gid_t)VNOVAL) {
1089 if (vap->va_gid == nvap->na_gid)
1090 vap->va_gid = (gid_t)VNOVAL;
1091 }
1092 if (vap->va_size != VNOVAL) {
1093 if (vap->va_size == nvap->na_size)
1094 vap->va_size = VNOVAL;
1095 }
1096
1097 /*
1098 * We are normally called with only a partially initialized
1099 * VAP. Since the NFSv3 spec says that server may use the
1100 * file attributes to store the verifier, the spec requires
1101 * us to do a SETATTR RPC. FreeBSD servers store the verifier
1102 * in atime, but we can't really assume that all servers will
1103 * so we ensure that our SETATTR sets both atime and mtime.
1104 * Set the VA_UTIMES_NULL flag for this case, so that
1105 * the server's time will be used. This is needed to
1106 * work around a bug in some Solaris servers, where
1107 * setting the time TOCLIENT causes the Setattr RPC
1108 * to return NFS_OK, but not set va_mode.
1109 */
1110 if (vap->va_mtime.tv_sec == VNOVAL) {
1111 vfs_timestamp(&vap->va_mtime);
1112 vap->va_vaflags |= VA_UTIMES_NULL;
1113 }
1114 if (vap->va_atime.tv_sec == VNOVAL)
1115 vap->va_atime = vap->va_mtime;
1116 return (1);
1117 }
1118
1119 /*
1120 * Map nfsv4 errors to errno.h errors.
1121 * The uid and gid arguments are only used for NFSERR_BADOWNER and that
1122 * error should only be returned for the Open, Create and Setattr Ops.
1123 * As such, most calls can just pass in 0 for those arguments.
1124 */
1125 APPLESTATIC int
1126 nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid)
1127 {
1128 struct proc *p;
1129
1130 if (error < 10000 || error >= NFSERR_STALEWRITEVERF)
1131 return (error);
1132 if (td != NULL)
1133 p = td->td_proc;
1134 else
1135 p = NULL;
1136 switch (error) {
1137 case NFSERR_BADOWNER:
1138 tprintf(p, LOG_INFO,
1139 "No name and/or group mapping for uid,gid:(%d,%d)\n",
1140 uid, gid);
1141 return (EPERM);
1142 case NFSERR_BADNAME:
1143 case NFSERR_BADCHAR:
1144 printf("nfsv4 char/name not handled by server\n");
1145 return (ENOENT);
1146 case NFSERR_STALECLIENTID:
1147 case NFSERR_STALESTATEID:
1148 case NFSERR_EXPIRED:
1149 case NFSERR_BADSTATEID:
1150 case NFSERR_BADSESSION:
1151 printf("nfsv4 recover err returned %d\n", error);
1152 return (EIO);
1153 case NFSERR_BADHANDLE:
1154 case NFSERR_SERVERFAULT:
1155 case NFSERR_BADTYPE:
1156 case NFSERR_FHEXPIRED:
1157 case NFSERR_RESOURCE:
1158 case NFSERR_MOVED:
1159 case NFSERR_NOFILEHANDLE:
1160 case NFSERR_MINORVERMISMATCH:
1161 case NFSERR_OLDSTATEID:
1162 case NFSERR_BADSEQID:
1163 case NFSERR_LEASEMOVED:
1164 case NFSERR_RECLAIMBAD:
1165 case NFSERR_BADXDR:
1166 case NFSERR_OPILLEGAL:
1167 printf("nfsv4 client/server protocol prob err=%d\n",
1168 error);
1169 return (EIO);
1170 default:
1171 tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error);
1172 return (EIO);
1173 };
1174 }
1175
1176 /*
1177 * Check to see if the process for this owner exists. Return 1 if it doesn't
1178 * and 0 otherwise.
1179 */
1180 int
1181 nfscl_procdoesntexist(u_int8_t *own)
1182 {
1183 union {
1184 u_int32_t lval;
1185 u_int8_t cval[4];
1186 } tl;
1187 struct proc *p;
1188 pid_t pid;
1189 int i, ret = 0;
1190
1191 /* For the single open_owner of all 0 bytes, just return 0. */
1192 for (i = 0; i < NFSV4CL_LOCKNAMELEN; i++)
1193 if (own[i] != 0)
1194 break;
1195 if (i == NFSV4CL_LOCKNAMELEN)
1196 return (0);
1197
1198 tl.cval[0] = *own++;
1199 tl.cval[1] = *own++;
1200 tl.cval[2] = *own++;
1201 tl.cval[3] = *own++;
1202 pid = tl.lval;
1203 p = pfind_locked(pid);
1204 if (p == NULL)
1205 return (1);
1206 if (p->p_stats == NULL) {
1207 PROC_UNLOCK(p);
1208 return (0);
1209 }
1210 tl.cval[0] = *own++;
1211 tl.cval[1] = *own++;
1212 tl.cval[2] = *own++;
1213 tl.cval[3] = *own++;
1214 if (tl.lval != p->p_stats->p_start.tv_sec) {
1215 ret = 1;
1216 } else {
1217 tl.cval[0] = *own++;
1218 tl.cval[1] = *own++;
1219 tl.cval[2] = *own++;
1220 tl.cval[3] = *own;
1221 if (tl.lval != p->p_stats->p_start.tv_usec)
1222 ret = 1;
1223 }
1224 PROC_UNLOCK(p);
1225 return (ret);
1226 }
1227
1228 /*
1229 * - nfs pseudo system call for the client
1230 */
1231 /*
1232 * MPSAFE
1233 */
1234 static int
1235 nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap)
1236 {
1237 struct file *fp;
1238 struct nfscbd_args nfscbdarg;
1239 struct nfsd_nfscbd_args nfscbdarg2;
1240 struct nameidata nd;
1241 struct nfscl_dumpmntopts dumpmntopts;
1242 cap_rights_t rights;
1243 char *buf;
1244 int error;
1245
1246 if (uap->flag & NFSSVC_CBADDSOCK) {
1247 error = copyin(uap->argp, (caddr_t)&nfscbdarg, sizeof(nfscbdarg));
1248 if (error)
1249 return (error);
1250 /*
1251 * Since we don't know what rights might be required,
1252 * pretend that we need them all. It is better to be too
1253 * careful than too reckless.
1254 */
1255 error = fget(td, nfscbdarg.sock,
1256 cap_rights_init(&rights, CAP_SOCK_CLIENT), &fp);
1257 if (error)
1258 return (error);
1259 if (fp->f_type != DTYPE_SOCKET) {
1260 fdrop(fp, td);
1261 return (EPERM);
1262 }
1263 error = nfscbd_addsock(fp);
1264 fdrop(fp, td);
1265 if (!error && nfscl_enablecallb == 0) {
1266 nfsv4_cbport = nfscbdarg.port;
1267 nfscl_enablecallb = 1;
1268 }
1269 } else if (uap->flag & NFSSVC_NFSCBD) {
1270 if (uap->argp == NULL)
1271 return (EINVAL);
1272 error = copyin(uap->argp, (caddr_t)&nfscbdarg2,
1273 sizeof(nfscbdarg2));
1274 if (error)
1275 return (error);
1276 error = nfscbd_nfsd(td, &nfscbdarg2);
1277 } else if (uap->flag & NFSSVC_DUMPMNTOPTS) {
1278 error = copyin(uap->argp, &dumpmntopts, sizeof(dumpmntopts));
1279 if (error == 0 && (dumpmntopts.ndmnt_blen < 256 ||
1280 dumpmntopts.ndmnt_blen > 1024))
1281 error = EINVAL;
1282 if (error == 0)
1283 error = nfsrv_lookupfilename(&nd,
1284 dumpmntopts.ndmnt_fname, td);
1285 if (error == 0 && strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name,
1286 "nfs") != 0) {
1287 vput(nd.ni_vp);
1288 error = EINVAL;
1289 }
1290 if (error == 0) {
1291 buf = malloc(dumpmntopts.ndmnt_blen, M_TEMP, M_WAITOK);
1292 nfscl_retopts(VFSTONFS(nd.ni_vp->v_mount), buf,
1293 dumpmntopts.ndmnt_blen);
1294 vput(nd.ni_vp);
1295 error = copyout(buf, dumpmntopts.ndmnt_buf,
1296 dumpmntopts.ndmnt_blen);
1297 free(buf, M_TEMP);
1298 }
1299 } else {
1300 error = EINVAL;
1301 }
1302 return (error);
1303 }
1304
1305 extern int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *);
1306
1307 /*
1308 * Called once to initialize data structures...
1309 */
1310 static int
1311 nfscl_modevent(module_t mod, int type, void *data)
1312 {
1313 int error = 0;
1314 static int loaded = 0;
1315
1316 switch (type) {
1317 case MOD_LOAD:
1318 if (loaded)
1319 return (0);
1320 newnfs_portinit();
1321 mtx_init(&ncl_iod_mutex, "ncl_iod_mutex", NULL, MTX_DEF);
1322 nfscl_init();
1323 NFSD_LOCK();
1324 nfsrvd_cbinit(0);
1325 NFSD_UNLOCK();
1326 ncl_call_invalcaches = ncl_invalcaches;
1327 nfsd_call_nfscl = nfssvc_nfscl;
1328 loaded = 1;
1329 break;
1330
1331 case MOD_UNLOAD:
1332 if (nfs_numnfscbd != 0) {
1333 error = EBUSY;
1334 break;
1335 }
1336
1337 /*
1338 * XXX: Unloading of nfscl module is unsupported.
1339 */
1340 #if 0
1341 ncl_call_invalcaches = NULL;
1342 nfsd_call_nfscl = NULL;
1343 /* and get rid of the mutexes */
1344 mtx_destroy(&ncl_iod_mutex);
1345 loaded = 0;
1346 break;
1347 #else
1348 /* FALLTHROUGH */
1349 #endif
1350 default:
1351 error = EOPNOTSUPP;
1352 break;
1353 }
1354 return error;
1355 }
1356 static moduledata_t nfscl_mod = {
1357 "nfscl",
1358 nfscl_modevent,
1359 NULL,
1360 };
1361 DECLARE_MODULE(nfscl, nfscl_mod, SI_SUB_VFS, SI_ORDER_FIRST);
1362
1363 /* So that loader and kldload(2) can find us, wherever we are.. */
1364 MODULE_VERSION(nfscl, 1);
1365 MODULE_DEPEND(nfscl, nfscommon, 1, 1, 1);
1366 MODULE_DEPEND(nfscl, krpc, 1, 1, 1);
1367 MODULE_DEPEND(nfscl, nfssvc, 1, 1, 1);
1368 MODULE_DEPEND(nfscl, nfslock, 1, 1, 1);
1369
Cache object: 0f725651e7e7f1104cfcb33e798e01f0
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