1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
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 */
35
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD: releng/12.0/sys/fs/nfsclient/nfs_clport.c 335130 2018-06-14 10:00:19Z rmacklem $");
38
39 #include "opt_inet.h"
40 #include "opt_inet6.h"
41
42 #include <sys/capsicum.h>
43
44 /*
45 * generally, I don't like #includes inside .h files, but it seems to
46 * be the easiest way to handle the port.
47 */
48 #include <sys/fail.h>
49 #include <sys/hash.h>
50 #include <sys/sysctl.h>
51 #include <fs/nfs/nfsport.h>
52 #include <netinet/in_fib.h>
53 #include <netinet/if_ether.h>
54 #include <netinet6/ip6_var.h>
55 #include <net/if_types.h>
56
57 #include <fs/nfsclient/nfs_kdtrace.h>
58
59 #ifdef KDTRACE_HOOKS
60 dtrace_nfsclient_attrcache_flush_probe_func_t
61 dtrace_nfscl_attrcache_flush_done_probe;
62 uint32_t nfscl_attrcache_flush_done_id;
63
64 dtrace_nfsclient_attrcache_get_hit_probe_func_t
65 dtrace_nfscl_attrcache_get_hit_probe;
66 uint32_t nfscl_attrcache_get_hit_id;
67
68 dtrace_nfsclient_attrcache_get_miss_probe_func_t
69 dtrace_nfscl_attrcache_get_miss_probe;
70 uint32_t nfscl_attrcache_get_miss_id;
71
72 dtrace_nfsclient_attrcache_load_probe_func_t
73 dtrace_nfscl_attrcache_load_done_probe;
74 uint32_t nfscl_attrcache_load_done_id;
75 #endif /* !KDTRACE_HOOKS */
76
77 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1;
78 extern struct vop_vector newnfs_vnodeops;
79 extern struct vop_vector newnfs_fifoops;
80 extern uma_zone_t newnfsnode_zone;
81 extern struct buf_ops buf_ops_newnfs;
82 extern int ncl_pbuf_freecnt;
83 extern short nfsv4_cbport;
84 extern int nfscl_enablecallb;
85 extern int nfs_numnfscbd;
86 extern int nfscl_inited;
87 struct mtx ncl_iod_mutex;
88 NFSDLOCKMUTEX;
89 extern struct mtx nfsrv_dslock_mtx;
90
91 extern void (*ncl_call_invalcaches)(struct vnode *);
92
93 SYSCTL_DECL(_vfs_nfs);
94 static int ncl_fileid_maxwarnings = 10;
95 SYSCTL_INT(_vfs_nfs, OID_AUTO, fileid_maxwarnings, CTLFLAG_RWTUN,
96 &ncl_fileid_maxwarnings, 0,
97 "Limit fileid corruption warnings; 0 is off; -1 is unlimited");
98 static volatile int ncl_fileid_nwarnings;
99
100 static void nfscl_warn_fileid(struct nfsmount *, struct nfsvattr *,
101 struct nfsvattr *);
102
103 /*
104 * Comparison function for vfs_hash functions.
105 */
106 int
107 newnfs_vncmpf(struct vnode *vp, void *arg)
108 {
109 struct nfsfh *nfhp = (struct nfsfh *)arg;
110 struct nfsnode *np = VTONFS(vp);
111
112 if (np->n_fhp->nfh_len != nfhp->nfh_len ||
113 NFSBCMP(np->n_fhp->nfh_fh, nfhp->nfh_fh, nfhp->nfh_len))
114 return (1);
115 return (0);
116 }
117
118 /*
119 * Look up a vnode/nfsnode by file handle.
120 * Callers must check for mount points!!
121 * In all cases, a pointer to a
122 * nfsnode structure is returned.
123 * This variant takes a "struct nfsfh *" as second argument and uses
124 * that structure up, either by hanging off the nfsnode or FREEing it.
125 */
126 int
127 nfscl_nget(struct mount *mntp, struct vnode *dvp, struct nfsfh *nfhp,
128 struct componentname *cnp, struct thread *td, struct nfsnode **npp,
129 void *stuff, int lkflags)
130 {
131 struct nfsnode *np, *dnp;
132 struct vnode *vp, *nvp;
133 struct nfsv4node *newd, *oldd;
134 int error;
135 u_int hash;
136 struct nfsmount *nmp;
137
138 nmp = VFSTONFS(mntp);
139 dnp = VTONFS(dvp);
140 *npp = NULL;
141
142 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len, FNV1_32_INIT);
143
144 error = vfs_hash_get(mntp, hash, lkflags,
145 td, &nvp, newnfs_vncmpf, nfhp);
146 if (error == 0 && nvp != NULL) {
147 /*
148 * I believe there is a slight chance that vgonel() could
149 * get called on this vnode between when NFSVOPLOCK() drops
150 * the VI_LOCK() and vget() acquires it again, so that it
151 * hasn't yet had v_usecount incremented. If this were to
152 * happen, the VI_DOOMED flag would be set, so check for
153 * that here. Since we now have the v_usecount incremented,
154 * we should be ok until we vrele() it, if the VI_DOOMED
155 * flag isn't set now.
156 */
157 VI_LOCK(nvp);
158 if ((nvp->v_iflag & VI_DOOMED)) {
159 VI_UNLOCK(nvp);
160 vrele(nvp);
161 error = ENOENT;
162 } else {
163 VI_UNLOCK(nvp);
164 }
165 }
166 if (error) {
167 free(nfhp, M_NFSFH);
168 return (error);
169 }
170 if (nvp != NULL) {
171 np = VTONFS(nvp);
172 /*
173 * For NFSv4, check to see if it is the same name and
174 * replace the name, if it is different.
175 */
176 oldd = newd = NULL;
177 if ((nmp->nm_flag & NFSMNT_NFSV4) && np->n_v4 != NULL &&
178 nvp->v_type == VREG &&
179 (np->n_v4->n4_namelen != cnp->cn_namelen ||
180 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4),
181 cnp->cn_namelen) ||
182 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
183 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
184 dnp->n_fhp->nfh_len))) {
185 newd = malloc(
186 sizeof (struct nfsv4node) + dnp->n_fhp->nfh_len +
187 + cnp->cn_namelen - 1, M_NFSV4NODE, M_WAITOK);
188 NFSLOCKNODE(np);
189 if (newd != NULL && np->n_v4 != NULL && nvp->v_type == VREG
190 && (np->n_v4->n4_namelen != cnp->cn_namelen ||
191 NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4),
192 cnp->cn_namelen) ||
193 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
194 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
195 dnp->n_fhp->nfh_len))) {
196 oldd = np->n_v4;
197 np->n_v4 = newd;
198 newd = NULL;
199 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len;
200 np->n_v4->n4_namelen = cnp->cn_namelen;
201 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
202 dnp->n_fhp->nfh_len);
203 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4),
204 cnp->cn_namelen);
205 }
206 NFSUNLOCKNODE(np);
207 }
208 if (newd != NULL)
209 free(newd, M_NFSV4NODE);
210 if (oldd != NULL)
211 free(oldd, M_NFSV4NODE);
212 *npp = np;
213 free(nfhp, M_NFSFH);
214 return (0);
215 }
216 np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO);
217
218 error = getnewvnode(nfs_vnode_tag, mntp, &newnfs_vnodeops, &nvp);
219 if (error) {
220 uma_zfree(newnfsnode_zone, np);
221 free(nfhp, M_NFSFH);
222 return (error);
223 }
224 vp = nvp;
225 KASSERT(vp->v_bufobj.bo_bsize != 0, ("nfscl_nget: bo_bsize == 0"));
226 vp->v_bufobj.bo_ops = &buf_ops_newnfs;
227 vp->v_data = np;
228 np->n_vnode = vp;
229 /*
230 * Initialize the mutex even if the vnode is going to be a loser.
231 * This simplifies the logic in reclaim, which can then unconditionally
232 * destroy the mutex (in the case of the loser, or if hash_insert
233 * happened to return an error no special casing is needed).
234 */
235 mtx_init(&np->n_mtx, "NEWNFSnode lock", NULL, MTX_DEF | MTX_DUPOK);
236 lockinit(&np->n_excl, PVFS, "nfsupg", VLKTIMEOUT, LK_NOSHARE |
237 LK_CANRECURSE);
238
239 /*
240 * Are we getting the root? If so, make sure the vnode flags
241 * are correct
242 */
243 if ((nfhp->nfh_len == nmp->nm_fhsize) &&
244 !bcmp(nfhp->nfh_fh, nmp->nm_fh, nfhp->nfh_len)) {
245 if (vp->v_type == VNON)
246 vp->v_type = VDIR;
247 vp->v_vflag |= VV_ROOT;
248 }
249
250 np->n_fhp = nfhp;
251 /*
252 * For NFSv4, we have to attach the directory file handle and
253 * file name, so that Open Ops can be done later.
254 */
255 if (nmp->nm_flag & NFSMNT_NFSV4) {
256 np->n_v4 = malloc(sizeof (struct nfsv4node)
257 + dnp->n_fhp->nfh_len + cnp->cn_namelen - 1, M_NFSV4NODE,
258 M_WAITOK);
259 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len;
260 np->n_v4->n4_namelen = cnp->cn_namelen;
261 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
262 dnp->n_fhp->nfh_len);
263 NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4),
264 cnp->cn_namelen);
265 } else {
266 np->n_v4 = NULL;
267 }
268
269 /*
270 * NFS supports recursive and shared locking.
271 */
272 lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL);
273 VN_LOCK_AREC(vp);
274 VN_LOCK_ASHARE(vp);
275 error = insmntque(vp, mntp);
276 if (error != 0) {
277 *npp = NULL;
278 mtx_destroy(&np->n_mtx);
279 lockdestroy(&np->n_excl);
280 free(nfhp, M_NFSFH);
281 if (np->n_v4 != NULL)
282 free(np->n_v4, M_NFSV4NODE);
283 uma_zfree(newnfsnode_zone, np);
284 return (error);
285 }
286 error = vfs_hash_insert(vp, hash, lkflags,
287 td, &nvp, newnfs_vncmpf, nfhp);
288 if (error)
289 return (error);
290 if (nvp != NULL) {
291 *npp = VTONFS(nvp);
292 /* vfs_hash_insert() vput()'s the losing vnode */
293 return (0);
294 }
295 *npp = np;
296
297 return (0);
298 }
299
300 /*
301 * Another variant of nfs_nget(). This one is only used by reopen. It
302 * takes almost the same args as nfs_nget(), but only succeeds if an entry
303 * exists in the cache. (Since files should already be "open" with a
304 * vnode ref cnt on the node when reopen calls this, it should always
305 * succeed.)
306 * Also, don't get a vnode lock, since it may already be locked by some
307 * other process that is handling it. This is ok, since all other threads
308 * on the client are blocked by the nfsc_lock being exclusively held by the
309 * caller of this function.
310 */
311 int
312 nfscl_ngetreopen(struct mount *mntp, u_int8_t *fhp, int fhsize,
313 struct thread *td, struct nfsnode **npp)
314 {
315 struct vnode *nvp;
316 u_int hash;
317 struct nfsfh *nfhp;
318 int error;
319
320 *npp = NULL;
321 /* For forced dismounts, just return error. */
322 if (NFSCL_FORCEDISM(mntp))
323 return (EINTR);
324 nfhp = malloc(sizeof (struct nfsfh) + fhsize,
325 M_NFSFH, M_WAITOK);
326 bcopy(fhp, &nfhp->nfh_fh[0], fhsize);
327 nfhp->nfh_len = fhsize;
328
329 hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT);
330
331 /*
332 * First, try to get the vnode locked, but don't block for the lock.
333 */
334 error = vfs_hash_get(mntp, hash, (LK_EXCLUSIVE | LK_NOWAIT), td, &nvp,
335 newnfs_vncmpf, nfhp);
336 if (error == 0 && nvp != NULL) {
337 NFSVOPUNLOCK(nvp, 0);
338 } else if (error == EBUSY) {
339 /*
340 * It is safe so long as a vflush() with
341 * FORCECLOSE has not been done. Since the Renew thread is
342 * stopped and the MNTK_UNMOUNTF flag is set before doing
343 * a vflush() with FORCECLOSE, we should be ok here.
344 */
345 if (NFSCL_FORCEDISM(mntp))
346 error = EINTR;
347 else {
348 vfs_hash_ref(mntp, hash, td, &nvp, newnfs_vncmpf, nfhp);
349 if (nvp == NULL) {
350 error = ENOENT;
351 } else if ((nvp->v_iflag & VI_DOOMED) != 0) {
352 error = ENOENT;
353 vrele(nvp);
354 } else {
355 error = 0;
356 }
357 }
358 }
359 free(nfhp, M_NFSFH);
360 if (error)
361 return (error);
362 if (nvp != NULL) {
363 *npp = VTONFS(nvp);
364 return (0);
365 }
366 return (EINVAL);
367 }
368
369 static void
370 nfscl_warn_fileid(struct nfsmount *nmp, struct nfsvattr *oldnap,
371 struct nfsvattr *newnap)
372 {
373 int off;
374
375 if (ncl_fileid_maxwarnings >= 0 &&
376 ncl_fileid_nwarnings >= ncl_fileid_maxwarnings)
377 return;
378 off = 0;
379 if (ncl_fileid_maxwarnings >= 0) {
380 if (++ncl_fileid_nwarnings >= ncl_fileid_maxwarnings)
381 off = 1;
382 }
383
384 printf("newnfs: server '%s' error: fileid changed. "
385 "fsid %jx:%jx: expected fileid %#jx, got %#jx. "
386 "(BROKEN NFS SERVER OR MIDDLEWARE)\n",
387 nmp->nm_com.nmcom_hostname,
388 (uintmax_t)nmp->nm_fsid[0],
389 (uintmax_t)nmp->nm_fsid[1],
390 (uintmax_t)oldnap->na_fileid,
391 (uintmax_t)newnap->na_fileid);
392
393 if (off)
394 printf("newnfs: Logged %d times about fileid corruption; "
395 "going quiet to avoid spamming logs excessively. (Limit "
396 "is: %d).\n", ncl_fileid_nwarnings,
397 ncl_fileid_maxwarnings);
398 }
399
400 /*
401 * Load the attribute cache (that lives in the nfsnode entry) with
402 * the attributes of the second argument and
403 * Iff vaper not NULL
404 * copy the attributes to *vaper
405 * Similar to nfs_loadattrcache(), except the attributes are passed in
406 * instead of being parsed out of the mbuf list.
407 */
408 int
409 nfscl_loadattrcache(struct vnode **vpp, struct nfsvattr *nap, void *nvaper,
410 void *stuff, int writeattr, int dontshrink)
411 {
412 struct vnode *vp = *vpp;
413 struct vattr *vap, *nvap = &nap->na_vattr, *vaper = nvaper;
414 struct nfsnode *np;
415 struct nfsmount *nmp;
416 struct timespec mtime_save;
417 u_quad_t nsize;
418 int setnsize, error, force_fid_err;
419
420 error = 0;
421 setnsize = 0;
422 nsize = 0;
423
424 /*
425 * If v_type == VNON it is a new node, so fill in the v_type,
426 * n_mtime fields. Check to see if it represents a special
427 * device, and if so, check for a possible alias. Once the
428 * correct vnode has been obtained, fill in the rest of the
429 * information.
430 */
431 np = VTONFS(vp);
432 NFSLOCKNODE(np);
433 if (vp->v_type != nvap->va_type) {
434 vp->v_type = nvap->va_type;
435 if (vp->v_type == VFIFO)
436 vp->v_op = &newnfs_fifoops;
437 np->n_mtime = nvap->va_mtime;
438 }
439 nmp = VFSTONFS(vp->v_mount);
440 vap = &np->n_vattr.na_vattr;
441 mtime_save = vap->va_mtime;
442 if (writeattr) {
443 np->n_vattr.na_filerev = nap->na_filerev;
444 np->n_vattr.na_size = nap->na_size;
445 np->n_vattr.na_mtime = nap->na_mtime;
446 np->n_vattr.na_ctime = nap->na_ctime;
447 np->n_vattr.na_fsid = nap->na_fsid;
448 np->n_vattr.na_mode = nap->na_mode;
449 } else {
450 force_fid_err = 0;
451 KFAIL_POINT_ERROR(DEBUG_FP, nfscl_force_fileid_warning,
452 force_fid_err);
453 /*
454 * BROKEN NFS SERVER OR MIDDLEWARE
455 *
456 * Certain NFS servers (certain old proprietary filers ca.
457 * 2006) or broken middleboxes (e.g. WAN accelerator products)
458 * will respond to GETATTR requests with results for a
459 * different fileid.
460 *
461 * The WAN accelerator we've observed not only serves stale
462 * cache results for a given file, it also occasionally serves
463 * results for wholly different files. This causes surprising
464 * problems; for example the cached size attribute of a file
465 * may truncate down and then back up, resulting in zero
466 * regions in file contents read by applications. We observed
467 * this reliably with Clang and .c files during parallel build.
468 * A pcap revealed packet fragmentation and GETATTR RPC
469 * responses with wholly wrong fileids.
470 */
471 if ((np->n_vattr.na_fileid != 0 &&
472 np->n_vattr.na_fileid != nap->na_fileid) ||
473 force_fid_err) {
474 nfscl_warn_fileid(nmp, &np->n_vattr, nap);
475 error = EIDRM;
476 goto out;
477 }
478 NFSBCOPY((caddr_t)nap, (caddr_t)&np->n_vattr,
479 sizeof (struct nfsvattr));
480 }
481
482 /*
483 * For NFSv4, if the node's fsid is not equal to the mount point's
484 * fsid, return the low order 32bits of the node's fsid. This
485 * allows getcwd(3) to work. There is a chance that the fsid might
486 * be the same as a local fs, but since this is in an NFS mount
487 * point, I don't think that will cause any problems?
488 */
489 if (NFSHASNFSV4(nmp) && NFSHASHASSETFSID(nmp) &&
490 (nmp->nm_fsid[0] != np->n_vattr.na_filesid[0] ||
491 nmp->nm_fsid[1] != np->n_vattr.na_filesid[1])) {
492 /*
493 * va_fsid needs to be set to some value derived from
494 * np->n_vattr.na_filesid that is not equal
495 * vp->v_mount->mnt_stat.f_fsid[0], so that it changes
496 * from the value used for the top level server volume
497 * in the mounted subtree.
498 */
499 vn_fsid(vp, vap);
500 if ((uint32_t)vap->va_fsid == np->n_vattr.na_filesid[0])
501 vap->va_fsid = hash32_buf(
502 np->n_vattr.na_filesid, 2 * sizeof(uint64_t), 0);
503 } else
504 vn_fsid(vp, vap);
505 np->n_attrstamp = time_second;
506 if (vap->va_size != np->n_size) {
507 if (vap->va_type == VREG) {
508 if (dontshrink && vap->va_size < np->n_size) {
509 /*
510 * We've been told not to shrink the file;
511 * zero np->n_attrstamp to indicate that
512 * the attributes are stale.
513 */
514 vap->va_size = np->n_size;
515 np->n_attrstamp = 0;
516 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
517 vnode_pager_setsize(vp, np->n_size);
518 } else if (np->n_flag & NMODIFIED) {
519 /*
520 * We've modified the file: Use the larger
521 * of our size, and the server's size.
522 */
523 if (vap->va_size < np->n_size) {
524 vap->va_size = np->n_size;
525 } else {
526 np->n_size = vap->va_size;
527 np->n_flag |= NSIZECHANGED;
528 }
529 vnode_pager_setsize(vp, np->n_size);
530 } else if (vap->va_size < np->n_size) {
531 /*
532 * When shrinking the size, the call to
533 * vnode_pager_setsize() cannot be done
534 * with the mutex held, so delay it until
535 * after the mtx_unlock call.
536 */
537 nsize = np->n_size = vap->va_size;
538 np->n_flag |= NSIZECHANGED;
539 setnsize = 1;
540 } else {
541 np->n_size = vap->va_size;
542 np->n_flag |= NSIZECHANGED;
543 vnode_pager_setsize(vp, np->n_size);
544 }
545 } else {
546 np->n_size = vap->va_size;
547 }
548 }
549 /*
550 * The following checks are added to prevent a race between (say)
551 * a READDIR+ and a WRITE.
552 * READDIR+, WRITE requests sent out.
553 * READDIR+ resp, WRITE resp received on client.
554 * However, the WRITE resp was handled before the READDIR+ resp
555 * causing the post op attrs from the write to be loaded first
556 * and the attrs from the READDIR+ to be loaded later. If this
557 * happens, we have stale attrs loaded into the attrcache.
558 * We detect this by for the mtime moving back. We invalidate the
559 * attrcache when this happens.
560 */
561 if (timespeccmp(&mtime_save, &vap->va_mtime, >)) {
562 /* Size changed or mtime went backwards */
563 np->n_attrstamp = 0;
564 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
565 }
566 if (vaper != NULL) {
567 NFSBCOPY((caddr_t)vap, (caddr_t)vaper, sizeof(*vap));
568 if (np->n_flag & NCHG) {
569 if (np->n_flag & NACC)
570 vaper->va_atime = np->n_atim;
571 if (np->n_flag & NUPD)
572 vaper->va_mtime = np->n_mtim;
573 }
574 }
575
576 out:
577 #ifdef KDTRACE_HOOKS
578 if (np->n_attrstamp != 0)
579 KDTRACE_NFS_ATTRCACHE_LOAD_DONE(vp, vap, error);
580 #endif
581 NFSUNLOCKNODE(np);
582 if (setnsize)
583 vnode_pager_setsize(vp, nsize);
584 return (error);
585 }
586
587 /*
588 * Fill in the client id name. For these bytes:
589 * 1 - they must be unique
590 * 2 - they should be persistent across client reboots
591 * 1 is more critical than 2
592 * Use the mount point's unique id plus either the uuid or, if that
593 * isn't set, random junk.
594 */
595 void
596 nfscl_fillclid(u_int64_t clval, char *uuid, u_int8_t *cp, u_int16_t idlen)
597 {
598 int uuidlen;
599
600 /*
601 * First, put in the 64bit mount point identifier.
602 */
603 if (idlen >= sizeof (u_int64_t)) {
604 NFSBCOPY((caddr_t)&clval, cp, sizeof (u_int64_t));
605 cp += sizeof (u_int64_t);
606 idlen -= sizeof (u_int64_t);
607 }
608
609 /*
610 * If uuid is non-zero length, use it.
611 */
612 uuidlen = strlen(uuid);
613 if (uuidlen > 0 && idlen >= uuidlen) {
614 NFSBCOPY(uuid, cp, uuidlen);
615 cp += uuidlen;
616 idlen -= uuidlen;
617 }
618
619 /*
620 * This only normally happens if the uuid isn't set.
621 */
622 while (idlen > 0) {
623 *cp++ = (u_int8_t)(arc4random() % 256);
624 idlen--;
625 }
626 }
627
628 /*
629 * Fill in a lock owner name. For now, pid + the process's creation time.
630 */
631 void
632 nfscl_filllockowner(void *id, u_int8_t *cp, int flags)
633 {
634 union {
635 u_int32_t lval;
636 u_int8_t cval[4];
637 } tl;
638 struct proc *p;
639
640 if (id == NULL) {
641 /* Return the single open_owner of all 0 bytes. */
642 bzero(cp, NFSV4CL_LOCKNAMELEN);
643 return;
644 }
645 if ((flags & F_POSIX) != 0) {
646 p = (struct proc *)id;
647 tl.lval = p->p_pid;
648 *cp++ = tl.cval[0];
649 *cp++ = tl.cval[1];
650 *cp++ = tl.cval[2];
651 *cp++ = tl.cval[3];
652 tl.lval = p->p_stats->p_start.tv_sec;
653 *cp++ = tl.cval[0];
654 *cp++ = tl.cval[1];
655 *cp++ = tl.cval[2];
656 *cp++ = tl.cval[3];
657 tl.lval = p->p_stats->p_start.tv_usec;
658 *cp++ = tl.cval[0];
659 *cp++ = tl.cval[1];
660 *cp++ = tl.cval[2];
661 *cp = tl.cval[3];
662 } else if ((flags & F_FLOCK) != 0) {
663 bcopy(&id, cp, sizeof(id));
664 bzero(&cp[sizeof(id)], NFSV4CL_LOCKNAMELEN - sizeof(id));
665 } else {
666 printf("nfscl_filllockowner: not F_POSIX or F_FLOCK\n");
667 bzero(cp, NFSV4CL_LOCKNAMELEN);
668 }
669 }
670
671 /*
672 * Find the parent process for the thread passed in as an argument.
673 * If none exists, return NULL, otherwise return a thread for the parent.
674 * (Can be any of the threads, since it is only used for td->td_proc.)
675 */
676 NFSPROC_T *
677 nfscl_getparent(struct thread *td)
678 {
679 struct proc *p;
680 struct thread *ptd;
681
682 if (td == NULL)
683 return (NULL);
684 p = td->td_proc;
685 if (p->p_pid == 0)
686 return (NULL);
687 p = p->p_pptr;
688 if (p == NULL)
689 return (NULL);
690 ptd = TAILQ_FIRST(&p->p_threads);
691 return (ptd);
692 }
693
694 /*
695 * Start up the renew kernel thread.
696 */
697 static void
698 start_nfscl(void *arg)
699 {
700 struct nfsclclient *clp;
701 struct thread *td;
702
703 clp = (struct nfsclclient *)arg;
704 td = TAILQ_FIRST(&clp->nfsc_renewthread->p_threads);
705 nfscl_renewthread(clp, td);
706 kproc_exit(0);
707 }
708
709 void
710 nfscl_start_renewthread(struct nfsclclient *clp)
711 {
712
713 kproc_create(start_nfscl, (void *)clp, &clp->nfsc_renewthread, 0, 0,
714 "nfscl");
715 }
716
717 /*
718 * Handle wcc_data.
719 * For NFSv4, it assumes that nfsv4_wccattr() was used to set up the getattr
720 * as the first Op after PutFH.
721 * (For NFSv4, the postop attributes are after the Op, so they can't be
722 * parsed here. A separate call to nfscl_postop_attr() is required.)
723 */
724 int
725 nfscl_wcc_data(struct nfsrv_descript *nd, struct vnode *vp,
726 struct nfsvattr *nap, int *flagp, int *wccflagp, void *stuff)
727 {
728 u_int32_t *tl;
729 struct nfsnode *np = VTONFS(vp);
730 struct nfsvattr nfsva;
731 int error = 0;
732
733 if (wccflagp != NULL)
734 *wccflagp = 0;
735 if (nd->nd_flag & ND_NFSV3) {
736 *flagp = 0;
737 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
738 if (*tl == newnfs_true) {
739 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
740 if (wccflagp != NULL) {
741 mtx_lock(&np->n_mtx);
742 *wccflagp = (np->n_mtime.tv_sec ==
743 fxdr_unsigned(u_int32_t, *(tl + 2)) &&
744 np->n_mtime.tv_nsec ==
745 fxdr_unsigned(u_int32_t, *(tl + 3)));
746 mtx_unlock(&np->n_mtx);
747 }
748 }
749 error = nfscl_postop_attr(nd, nap, flagp, stuff);
750 if (wccflagp != NULL && *flagp == 0)
751 *wccflagp = 0;
752 } else if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR))
753 == (ND_NFSV4 | ND_V4WCCATTR)) {
754 error = nfsv4_loadattr(nd, NULL, &nfsva, NULL,
755 NULL, 0, NULL, NULL, NULL, NULL, NULL, 0,
756 NULL, NULL, NULL, NULL, NULL);
757 if (error)
758 return (error);
759 /*
760 * Get rid of Op# and status for next op.
761 */
762 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
763 if (*++tl)
764 nd->nd_flag |= ND_NOMOREDATA;
765 if (wccflagp != NULL &&
766 nfsva.na_vattr.va_mtime.tv_sec != 0) {
767 mtx_lock(&np->n_mtx);
768 *wccflagp = (np->n_mtime.tv_sec ==
769 nfsva.na_vattr.va_mtime.tv_sec &&
770 np->n_mtime.tv_nsec ==
771 nfsva.na_vattr.va_mtime.tv_sec);
772 mtx_unlock(&np->n_mtx);
773 }
774 }
775 nfsmout:
776 return (error);
777 }
778
779 /*
780 * Get postop attributes.
781 */
782 int
783 nfscl_postop_attr(struct nfsrv_descript *nd, struct nfsvattr *nap, int *retp,
784 void *stuff)
785 {
786 u_int32_t *tl;
787 int error = 0;
788
789 *retp = 0;
790 if (nd->nd_flag & ND_NOMOREDATA)
791 return (error);
792 if (nd->nd_flag & ND_NFSV3) {
793 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
794 *retp = fxdr_unsigned(int, *tl);
795 } else if (nd->nd_flag & ND_NFSV4) {
796 /*
797 * For NFSv4, the postop attr are at the end, so no point
798 * in looking if nd_repstat != 0.
799 */
800 if (!nd->nd_repstat) {
801 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
802 if (*(tl + 1))
803 /* should never happen since nd_repstat != 0 */
804 nd->nd_flag |= ND_NOMOREDATA;
805 else
806 *retp = 1;
807 }
808 } else if (!nd->nd_repstat) {
809 /* For NFSv2, the attributes are here iff nd_repstat == 0 */
810 *retp = 1;
811 }
812 if (*retp) {
813 error = nfsm_loadattr(nd, nap);
814 if (error)
815 *retp = 0;
816 }
817 nfsmout:
818 return (error);
819 }
820
821 /*
822 * nfscl_request() - mostly a wrapper for newnfs_request().
823 */
824 int
825 nfscl_request(struct nfsrv_descript *nd, struct vnode *vp, NFSPROC_T *p,
826 struct ucred *cred, void *stuff)
827 {
828 int ret, vers;
829 struct nfsmount *nmp;
830
831 nmp = VFSTONFS(vp->v_mount);
832 if (nd->nd_flag & ND_NFSV4)
833 vers = NFS_VER4;
834 else if (nd->nd_flag & ND_NFSV3)
835 vers = NFS_VER3;
836 else
837 vers = NFS_VER2;
838 ret = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred,
839 NFS_PROG, vers, NULL, 1, NULL, NULL);
840 return (ret);
841 }
842
843 /*
844 * fill in this bsden's variant of statfs using nfsstatfs.
845 */
846 void
847 nfscl_loadsbinfo(struct nfsmount *nmp, struct nfsstatfs *sfp, void *statfs)
848 {
849 struct statfs *sbp = (struct statfs *)statfs;
850
851 if (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) {
852 sbp->f_bsize = NFS_FABLKSIZE;
853 sbp->f_blocks = sfp->sf_tbytes / NFS_FABLKSIZE;
854 sbp->f_bfree = sfp->sf_fbytes / NFS_FABLKSIZE;
855 /*
856 * Although sf_abytes is uint64_t and f_bavail is int64_t,
857 * the value after dividing by NFS_FABLKSIZE is small
858 * enough that it will fit in 63bits, so it is ok to
859 * assign it to f_bavail without fear that it will become
860 * negative.
861 */
862 sbp->f_bavail = sfp->sf_abytes / NFS_FABLKSIZE;
863 sbp->f_files = sfp->sf_tfiles;
864 /* Since f_ffree is int64_t, clip it to 63bits. */
865 if (sfp->sf_ffiles > INT64_MAX)
866 sbp->f_ffree = INT64_MAX;
867 else
868 sbp->f_ffree = sfp->sf_ffiles;
869 } else if ((nmp->nm_flag & NFSMNT_NFSV4) == 0) {
870 /*
871 * The type casts to (int32_t) ensure that this code is
872 * compatible with the old NFS client, in that it will
873 * propagate bit31 to the high order bits. This may or may
874 * not be correct for NFSv2, but since it is a legacy
875 * environment, I'd rather retain backwards compatibility.
876 */
877 sbp->f_bsize = (int32_t)sfp->sf_bsize;
878 sbp->f_blocks = (int32_t)sfp->sf_blocks;
879 sbp->f_bfree = (int32_t)sfp->sf_bfree;
880 sbp->f_bavail = (int32_t)sfp->sf_bavail;
881 sbp->f_files = 0;
882 sbp->f_ffree = 0;
883 }
884 }
885
886 /*
887 * Use the fsinfo stuff to update the mount point.
888 */
889 void
890 nfscl_loadfsinfo(struct nfsmount *nmp, struct nfsfsinfo *fsp)
891 {
892
893 if ((nmp->nm_wsize == 0 || fsp->fs_wtpref < nmp->nm_wsize) &&
894 fsp->fs_wtpref >= NFS_FABLKSIZE)
895 nmp->nm_wsize = (fsp->fs_wtpref + NFS_FABLKSIZE - 1) &
896 ~(NFS_FABLKSIZE - 1);
897 if (fsp->fs_wtmax < nmp->nm_wsize && fsp->fs_wtmax > 0) {
898 nmp->nm_wsize = fsp->fs_wtmax & ~(NFS_FABLKSIZE - 1);
899 if (nmp->nm_wsize == 0)
900 nmp->nm_wsize = fsp->fs_wtmax;
901 }
902 if (nmp->nm_wsize < NFS_FABLKSIZE)
903 nmp->nm_wsize = NFS_FABLKSIZE;
904 if ((nmp->nm_rsize == 0 || fsp->fs_rtpref < nmp->nm_rsize) &&
905 fsp->fs_rtpref >= NFS_FABLKSIZE)
906 nmp->nm_rsize = (fsp->fs_rtpref + NFS_FABLKSIZE - 1) &
907 ~(NFS_FABLKSIZE - 1);
908 if (fsp->fs_rtmax < nmp->nm_rsize && fsp->fs_rtmax > 0) {
909 nmp->nm_rsize = fsp->fs_rtmax & ~(NFS_FABLKSIZE - 1);
910 if (nmp->nm_rsize == 0)
911 nmp->nm_rsize = fsp->fs_rtmax;
912 }
913 if (nmp->nm_rsize < NFS_FABLKSIZE)
914 nmp->nm_rsize = NFS_FABLKSIZE;
915 if ((nmp->nm_readdirsize == 0 || fsp->fs_dtpref < nmp->nm_readdirsize)
916 && fsp->fs_dtpref >= NFS_DIRBLKSIZ)
917 nmp->nm_readdirsize = (fsp->fs_dtpref + NFS_DIRBLKSIZ - 1) &
918 ~(NFS_DIRBLKSIZ - 1);
919 if (fsp->fs_rtmax < nmp->nm_readdirsize && fsp->fs_rtmax > 0) {
920 nmp->nm_readdirsize = fsp->fs_rtmax & ~(NFS_DIRBLKSIZ - 1);
921 if (nmp->nm_readdirsize == 0)
922 nmp->nm_readdirsize = fsp->fs_rtmax;
923 }
924 if (nmp->nm_readdirsize < NFS_DIRBLKSIZ)
925 nmp->nm_readdirsize = NFS_DIRBLKSIZ;
926 if (fsp->fs_maxfilesize > 0 &&
927 fsp->fs_maxfilesize < nmp->nm_maxfilesize)
928 nmp->nm_maxfilesize = fsp->fs_maxfilesize;
929 nmp->nm_mountp->mnt_stat.f_iosize = newnfs_iosize(nmp);
930 nmp->nm_state |= NFSSTA_GOTFSINFO;
931 }
932
933 /*
934 * Lookups source address which should be used to communicate with
935 * @nmp and stores it inside @pdst.
936 *
937 * Returns 0 on success.
938 */
939 u_int8_t *
940 nfscl_getmyip(struct nfsmount *nmp, struct in6_addr *paddr, int *isinet6p)
941 {
942 #if defined(INET6) || defined(INET)
943 int error, fibnum;
944
945 fibnum = curthread->td_proc->p_fibnum;
946 #endif
947 #ifdef INET
948 if (nmp->nm_nam->sa_family == AF_INET) {
949 struct sockaddr_in *sin;
950 struct nhop4_extended nh_ext;
951
952 sin = (struct sockaddr_in *)nmp->nm_nam;
953 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred));
954 error = fib4_lookup_nh_ext(fibnum, sin->sin_addr, 0, 0,
955 &nh_ext);
956 CURVNET_RESTORE();
957 if (error != 0)
958 return (NULL);
959
960 if ((ntohl(nh_ext.nh_src.s_addr) >> IN_CLASSA_NSHIFT) ==
961 IN_LOOPBACKNET) {
962 /* Ignore loopback addresses */
963 return (NULL);
964 }
965
966 *isinet6p = 0;
967 *((struct in_addr *)paddr) = nh_ext.nh_src;
968
969 return (u_int8_t *)paddr;
970 }
971 #endif
972 #ifdef INET6
973 if (nmp->nm_nam->sa_family == AF_INET6) {
974 struct sockaddr_in6 *sin6;
975
976 sin6 = (struct sockaddr_in6 *)nmp->nm_nam;
977
978 CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred));
979 error = in6_selectsrc_addr(fibnum, &sin6->sin6_addr,
980 sin6->sin6_scope_id, NULL, paddr, NULL);
981 CURVNET_RESTORE();
982 if (error != 0)
983 return (NULL);
984
985 if (IN6_IS_ADDR_LOOPBACK(paddr))
986 return (NULL);
987
988 /* Scope is embedded in */
989 *isinet6p = 1;
990
991 return (u_int8_t *)paddr;
992 }
993 #endif
994 return (NULL);
995 }
996
997 /*
998 * Copy NFS uid, gids from the cred structure.
999 */
1000 void
1001 newnfs_copyincred(struct ucred *cr, struct nfscred *nfscr)
1002 {
1003 int i;
1004
1005 KASSERT(cr->cr_ngroups >= 0,
1006 ("newnfs_copyincred: negative cr_ngroups"));
1007 nfscr->nfsc_uid = cr->cr_uid;
1008 nfscr->nfsc_ngroups = MIN(cr->cr_ngroups, NFS_MAXGRPS + 1);
1009 for (i = 0; i < nfscr->nfsc_ngroups; i++)
1010 nfscr->nfsc_groups[i] = cr->cr_groups[i];
1011 }
1012
1013
1014 /*
1015 * Do any client specific initialization.
1016 */
1017 void
1018 nfscl_init(void)
1019 {
1020 static int inited = 0;
1021
1022 if (inited)
1023 return;
1024 inited = 1;
1025 nfscl_inited = 1;
1026 ncl_pbuf_freecnt = nswbuf / 2 + 1;
1027 }
1028
1029 /*
1030 * Check each of the attributes to be set, to ensure they aren't already
1031 * the correct value. Disable setting ones already correct.
1032 */
1033 int
1034 nfscl_checksattr(struct vattr *vap, struct nfsvattr *nvap)
1035 {
1036
1037 if (vap->va_mode != (mode_t)VNOVAL) {
1038 if (vap->va_mode == nvap->na_mode)
1039 vap->va_mode = (mode_t)VNOVAL;
1040 }
1041 if (vap->va_uid != (uid_t)VNOVAL) {
1042 if (vap->va_uid == nvap->na_uid)
1043 vap->va_uid = (uid_t)VNOVAL;
1044 }
1045 if (vap->va_gid != (gid_t)VNOVAL) {
1046 if (vap->va_gid == nvap->na_gid)
1047 vap->va_gid = (gid_t)VNOVAL;
1048 }
1049 if (vap->va_size != VNOVAL) {
1050 if (vap->va_size == nvap->na_size)
1051 vap->va_size = VNOVAL;
1052 }
1053
1054 /*
1055 * We are normally called with only a partially initialized
1056 * VAP. Since the NFSv3 spec says that server may use the
1057 * file attributes to store the verifier, the spec requires
1058 * us to do a SETATTR RPC. FreeBSD servers store the verifier
1059 * in atime, but we can't really assume that all servers will
1060 * so we ensure that our SETATTR sets both atime and mtime.
1061 * Set the VA_UTIMES_NULL flag for this case, so that
1062 * the server's time will be used. This is needed to
1063 * work around a bug in some Solaris servers, where
1064 * setting the time TOCLIENT causes the Setattr RPC
1065 * to return NFS_OK, but not set va_mode.
1066 */
1067 if (vap->va_mtime.tv_sec == VNOVAL) {
1068 vfs_timestamp(&vap->va_mtime);
1069 vap->va_vaflags |= VA_UTIMES_NULL;
1070 }
1071 if (vap->va_atime.tv_sec == VNOVAL)
1072 vap->va_atime = vap->va_mtime;
1073 return (1);
1074 }
1075
1076 /*
1077 * Map nfsv4 errors to errno.h errors.
1078 * The uid and gid arguments are only used for NFSERR_BADOWNER and that
1079 * error should only be returned for the Open, Create and Setattr Ops.
1080 * As such, most calls can just pass in 0 for those arguments.
1081 */
1082 APPLESTATIC int
1083 nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid)
1084 {
1085 struct proc *p;
1086
1087 if (error < 10000 || error >= NFSERR_STALEWRITEVERF)
1088 return (error);
1089 if (td != NULL)
1090 p = td->td_proc;
1091 else
1092 p = NULL;
1093 switch (error) {
1094 case NFSERR_BADOWNER:
1095 tprintf(p, LOG_INFO,
1096 "No name and/or group mapping for uid,gid:(%d,%d)\n",
1097 uid, gid);
1098 return (EPERM);
1099 case NFSERR_BADNAME:
1100 case NFSERR_BADCHAR:
1101 printf("nfsv4 char/name not handled by server\n");
1102 return (ENOENT);
1103 case NFSERR_STALECLIENTID:
1104 case NFSERR_STALESTATEID:
1105 case NFSERR_EXPIRED:
1106 case NFSERR_BADSTATEID:
1107 case NFSERR_BADSESSION:
1108 printf("nfsv4 recover err returned %d\n", error);
1109 return (EIO);
1110 case NFSERR_BADHANDLE:
1111 case NFSERR_SERVERFAULT:
1112 case NFSERR_BADTYPE:
1113 case NFSERR_FHEXPIRED:
1114 case NFSERR_RESOURCE:
1115 case NFSERR_MOVED:
1116 case NFSERR_NOFILEHANDLE:
1117 case NFSERR_MINORVERMISMATCH:
1118 case NFSERR_OLDSTATEID:
1119 case NFSERR_BADSEQID:
1120 case NFSERR_LEASEMOVED:
1121 case NFSERR_RECLAIMBAD:
1122 case NFSERR_BADXDR:
1123 case NFSERR_OPILLEGAL:
1124 printf("nfsv4 client/server protocol prob err=%d\n",
1125 error);
1126 return (EIO);
1127 default:
1128 tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error);
1129 return (EIO);
1130 };
1131 }
1132
1133 /*
1134 * Check to see if the process for this owner exists. Return 1 if it doesn't
1135 * and 0 otherwise.
1136 */
1137 int
1138 nfscl_procdoesntexist(u_int8_t *own)
1139 {
1140 union {
1141 u_int32_t lval;
1142 u_int8_t cval[4];
1143 } tl;
1144 struct proc *p;
1145 pid_t pid;
1146 int i, ret = 0;
1147
1148 /* For the single open_owner of all 0 bytes, just return 0. */
1149 for (i = 0; i < NFSV4CL_LOCKNAMELEN; i++)
1150 if (own[i] != 0)
1151 break;
1152 if (i == NFSV4CL_LOCKNAMELEN)
1153 return (0);
1154
1155 tl.cval[0] = *own++;
1156 tl.cval[1] = *own++;
1157 tl.cval[2] = *own++;
1158 tl.cval[3] = *own++;
1159 pid = tl.lval;
1160 p = pfind_locked(pid);
1161 if (p == NULL)
1162 return (1);
1163 if (p->p_stats == NULL) {
1164 PROC_UNLOCK(p);
1165 return (0);
1166 }
1167 tl.cval[0] = *own++;
1168 tl.cval[1] = *own++;
1169 tl.cval[2] = *own++;
1170 tl.cval[3] = *own++;
1171 if (tl.lval != p->p_stats->p_start.tv_sec) {
1172 ret = 1;
1173 } else {
1174 tl.cval[0] = *own++;
1175 tl.cval[1] = *own++;
1176 tl.cval[2] = *own++;
1177 tl.cval[3] = *own;
1178 if (tl.lval != p->p_stats->p_start.tv_usec)
1179 ret = 1;
1180 }
1181 PROC_UNLOCK(p);
1182 return (ret);
1183 }
1184
1185 /*
1186 * - nfs pseudo system call for the client
1187 */
1188 /*
1189 * MPSAFE
1190 */
1191 static int
1192 nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap)
1193 {
1194 struct file *fp;
1195 struct nfscbd_args nfscbdarg;
1196 struct nfsd_nfscbd_args nfscbdarg2;
1197 struct nameidata nd;
1198 struct nfscl_dumpmntopts dumpmntopts;
1199 cap_rights_t rights;
1200 char *buf;
1201 int error;
1202 struct mount *mp;
1203 struct nfsmount *nmp;
1204
1205 if (uap->flag & NFSSVC_CBADDSOCK) {
1206 error = copyin(uap->argp, (caddr_t)&nfscbdarg, sizeof(nfscbdarg));
1207 if (error)
1208 return (error);
1209 /*
1210 * Since we don't know what rights might be required,
1211 * pretend that we need them all. It is better to be too
1212 * careful than too reckless.
1213 */
1214 error = fget(td, nfscbdarg.sock,
1215 cap_rights_init(&rights, CAP_SOCK_CLIENT), &fp);
1216 if (error)
1217 return (error);
1218 if (fp->f_type != DTYPE_SOCKET) {
1219 fdrop(fp, td);
1220 return (EPERM);
1221 }
1222 error = nfscbd_addsock(fp);
1223 fdrop(fp, td);
1224 if (!error && nfscl_enablecallb == 0) {
1225 nfsv4_cbport = nfscbdarg.port;
1226 nfscl_enablecallb = 1;
1227 }
1228 } else if (uap->flag & NFSSVC_NFSCBD) {
1229 if (uap->argp == NULL)
1230 return (EINVAL);
1231 error = copyin(uap->argp, (caddr_t)&nfscbdarg2,
1232 sizeof(nfscbdarg2));
1233 if (error)
1234 return (error);
1235 error = nfscbd_nfsd(td, &nfscbdarg2);
1236 } else if (uap->flag & NFSSVC_DUMPMNTOPTS) {
1237 error = copyin(uap->argp, &dumpmntopts, sizeof(dumpmntopts));
1238 if (error == 0 && (dumpmntopts.ndmnt_blen < 256 ||
1239 dumpmntopts.ndmnt_blen > 1024))
1240 error = EINVAL;
1241 if (error == 0)
1242 error = nfsrv_lookupfilename(&nd,
1243 dumpmntopts.ndmnt_fname, td);
1244 if (error == 0 && strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name,
1245 "nfs") != 0) {
1246 vput(nd.ni_vp);
1247 error = EINVAL;
1248 }
1249 if (error == 0) {
1250 buf = malloc(dumpmntopts.ndmnt_blen, M_TEMP, M_WAITOK);
1251 nfscl_retopts(VFSTONFS(nd.ni_vp->v_mount), buf,
1252 dumpmntopts.ndmnt_blen);
1253 vput(nd.ni_vp);
1254 error = copyout(buf, dumpmntopts.ndmnt_buf,
1255 dumpmntopts.ndmnt_blen);
1256 free(buf, M_TEMP);
1257 }
1258 } else if (uap->flag & NFSSVC_FORCEDISM) {
1259 buf = malloc(MNAMELEN + 1, M_TEMP, M_WAITOK);
1260 error = copyinstr(uap->argp, buf, MNAMELEN + 1, NULL);
1261 if (error == 0) {
1262 nmp = NULL;
1263 mtx_lock(&mountlist_mtx);
1264 TAILQ_FOREACH(mp, &mountlist, mnt_list) {
1265 if (strcmp(mp->mnt_stat.f_mntonname, buf) ==
1266 0 && strcmp(mp->mnt_stat.f_fstypename,
1267 "nfs") == 0 && mp->mnt_data != NULL) {
1268 nmp = VFSTONFS(mp);
1269 NFSDDSLOCK();
1270 if (nfsv4_findmirror(nmp) != NULL) {
1271 NFSDDSUNLOCK();
1272 error = ENXIO;
1273 nmp = NULL;
1274 break;
1275 }
1276 mtx_lock(&nmp->nm_mtx);
1277 if ((nmp->nm_privflag &
1278 NFSMNTP_FORCEDISM) == 0) {
1279 nmp->nm_privflag |=
1280 (NFSMNTP_FORCEDISM |
1281 NFSMNTP_CANCELRPCS);
1282 mtx_unlock(&nmp->nm_mtx);
1283 } else {
1284 mtx_unlock(&nmp->nm_mtx);
1285 nmp = NULL;
1286 }
1287 NFSDDSUNLOCK();
1288 break;
1289 }
1290 }
1291 mtx_unlock(&mountlist_mtx);
1292
1293 if (nmp != NULL) {
1294 /*
1295 * Call newnfs_nmcancelreqs() to cause
1296 * any RPCs in progress on the mount point to
1297 * fail.
1298 * This will cause any process waiting for an
1299 * RPC to complete while holding a vnode lock
1300 * on the mounted-on vnode (such as "df" or
1301 * a non-forced "umount") to fail.
1302 * This will unlock the mounted-on vnode so
1303 * a forced dismount can succeed.
1304 * Then clear NFSMNTP_CANCELRPCS and wakeup(),
1305 * so that nfs_unmount() can complete.
1306 */
1307 newnfs_nmcancelreqs(nmp);
1308 mtx_lock(&nmp->nm_mtx);
1309 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS;
1310 wakeup(nmp);
1311 mtx_unlock(&nmp->nm_mtx);
1312 } else if (error == 0)
1313 error = EINVAL;
1314 }
1315 free(buf, M_TEMP);
1316 } else {
1317 error = EINVAL;
1318 }
1319 return (error);
1320 }
1321
1322 extern int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *);
1323
1324 /*
1325 * Called once to initialize data structures...
1326 */
1327 static int
1328 nfscl_modevent(module_t mod, int type, void *data)
1329 {
1330 int error = 0;
1331 static int loaded = 0;
1332
1333 switch (type) {
1334 case MOD_LOAD:
1335 if (loaded)
1336 return (0);
1337 newnfs_portinit();
1338 mtx_init(&ncl_iod_mutex, "ncl_iod_mutex", NULL, MTX_DEF);
1339 nfscl_init();
1340 NFSD_LOCK();
1341 nfsrvd_cbinit(0);
1342 NFSD_UNLOCK();
1343 ncl_call_invalcaches = ncl_invalcaches;
1344 nfsd_call_nfscl = nfssvc_nfscl;
1345 loaded = 1;
1346 break;
1347
1348 case MOD_UNLOAD:
1349 if (nfs_numnfscbd != 0) {
1350 error = EBUSY;
1351 break;
1352 }
1353
1354 /*
1355 * XXX: Unloading of nfscl module is unsupported.
1356 */
1357 #if 0
1358 ncl_call_invalcaches = NULL;
1359 nfsd_call_nfscl = NULL;
1360 /* and get rid of the mutexes */
1361 mtx_destroy(&ncl_iod_mutex);
1362 loaded = 0;
1363 break;
1364 #else
1365 /* FALLTHROUGH */
1366 #endif
1367 default:
1368 error = EOPNOTSUPP;
1369 break;
1370 }
1371 return error;
1372 }
1373 static moduledata_t nfscl_mod = {
1374 "nfscl",
1375 nfscl_modevent,
1376 NULL,
1377 };
1378 DECLARE_MODULE(nfscl, nfscl_mod, SI_SUB_VFS, SI_ORDER_FIRST);
1379
1380 /* So that loader and kldload(2) can find us, wherever we are.. */
1381 MODULE_VERSION(nfscl, 1);
1382 MODULE_DEPEND(nfscl, nfscommon, 1, 1, 1);
1383 MODULE_DEPEND(nfscl, krpc, 1, 1, 1);
1384 MODULE_DEPEND(nfscl, nfssvc, 1, 1, 1);
1385 MODULE_DEPEND(nfscl, nfslock, 1, 1, 1);
1386
Cache object: c3e6e2bb88f974b2bcf958ce37ce6f51
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