1 | /* $NetBSD: nfs_clntsubs.c,v 1.2 2011/06/12 03:35:59 rmind Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 1989, 1993 |
5 | * The Regents of the University of California. All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to Berkeley by |
8 | * Rick Macklem at The University of Guelph. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * 3. Neither the name of the University nor the names of its contributors |
19 | * may be used to endorse or promote products derived from this software |
20 | * without specific prior written permission. |
21 | * |
22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
32 | * SUCH DAMAGE. |
33 | * |
34 | * @(#)nfs_subs.c 8.8 (Berkeley) 5/22/95 |
35 | */ |
36 | |
37 | /* |
38 | * Copyright 2000 Wasabi Systems, Inc. |
39 | * All rights reserved. |
40 | * |
41 | * Written by Frank van der Linden for Wasabi Systems, Inc. |
42 | * |
43 | * Redistribution and use in source and binary forms, with or without |
44 | * modification, are permitted provided that the following conditions |
45 | * are met: |
46 | * 1. Redistributions of source code must retain the above copyright |
47 | * notice, this list of conditions and the following disclaimer. |
48 | * 2. Redistributions in binary form must reproduce the above copyright |
49 | * notice, this list of conditions and the following disclaimer in the |
50 | * documentation and/or other materials provided with the distribution. |
51 | * 3. All advertising materials mentioning features or use of this software |
52 | * must display the following acknowledgement: |
53 | * This product includes software developed for the NetBSD Project by |
54 | * Wasabi Systems, Inc. |
55 | * 4. The name of Wasabi Systems, Inc. may not be used to endorse |
56 | * or promote products derived from this software without specific prior |
57 | * written permission. |
58 | * |
59 | * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND |
60 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
61 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
62 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC |
63 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
64 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
65 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
66 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
67 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
68 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
69 | * POSSIBILITY OF SUCH DAMAGE. |
70 | */ |
71 | |
72 | #include <sys/cdefs.h> |
73 | __KERNEL_RCSID(0, "$NetBSD: nfs_clntsubs.c,v 1.2 2011/06/12 03:35:59 rmind Exp $" ); |
74 | |
75 | #ifdef _KERNEL_OPT |
76 | #include "opt_nfs.h" |
77 | #endif |
78 | |
79 | /* |
80 | * These functions support the macros and help fiddle mbuf chains for |
81 | * the nfs op functions. They do things like create the rpc header and |
82 | * copy data between mbuf chains and uio lists. |
83 | */ |
84 | #include <sys/param.h> |
85 | #include <sys/proc.h> |
86 | #include <sys/systm.h> |
87 | #include <sys/kernel.h> |
88 | #include <sys/kmem.h> |
89 | #include <sys/mount.h> |
90 | #include <sys/vnode.h> |
91 | #include <sys/namei.h> |
92 | #include <sys/mbuf.h> |
93 | #include <sys/socket.h> |
94 | #include <sys/stat.h> |
95 | #include <sys/filedesc.h> |
96 | #include <sys/time.h> |
97 | #include <sys/dirent.h> |
98 | #include <sys/once.h> |
99 | #include <sys/kauth.h> |
100 | #include <sys/atomic.h> |
101 | |
102 | #include <uvm/uvm_extern.h> |
103 | |
104 | #include <nfs/rpcv2.h> |
105 | #include <nfs/nfsproto.h> |
106 | #include <nfs/nfsnode.h> |
107 | #include <nfs/nfs.h> |
108 | #include <nfs/xdr_subs.h> |
109 | #include <nfs/nfsm_subs.h> |
110 | #include <nfs/nfsmount.h> |
111 | #include <nfs/nfsrtt.h> |
112 | #include <nfs/nfs_var.h> |
113 | |
114 | #include <miscfs/specfs/specdev.h> |
115 | |
116 | #include <netinet/in.h> |
117 | |
118 | /* |
119 | * Attribute cache routines. |
120 | * nfs_loadattrcache() - loads or updates the cache contents from attributes |
121 | * that are on the mbuf list |
122 | * nfs_getattrcache() - returns valid attributes if found in cache, returns |
123 | * error otherwise |
124 | */ |
125 | |
126 | /* |
127 | * Load the attribute cache (that lives in the nfsnode entry) with |
128 | * the values on the mbuf list and |
129 | * Iff vap not NULL |
130 | * copy the attributes to *vaper |
131 | */ |
132 | int |
133 | nfsm_loadattrcache(struct vnode **vpp, struct mbuf **mdp, char **dposp, struct vattr *vaper, int flags) |
134 | { |
135 | int32_t t1; |
136 | char *cp2; |
137 | int error = 0; |
138 | struct mbuf *md; |
139 | int v3 = NFS_ISV3(*vpp); |
140 | |
141 | md = *mdp; |
142 | t1 = (mtod(md, char *) + md->m_len) - *dposp; |
143 | error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2); |
144 | if (error) |
145 | return (error); |
146 | return nfs_loadattrcache(vpp, (struct nfs_fattr *)cp2, vaper, flags); |
147 | } |
148 | |
149 | int |
150 | nfs_loadattrcache(struct vnode **vpp, struct nfs_fattr *fp, struct vattr *vaper, int flags) |
151 | { |
152 | struct vnode *vp = *vpp; |
153 | struct vattr *vap; |
154 | int v3 = NFS_ISV3(vp); |
155 | enum vtype vtyp; |
156 | u_short vmode; |
157 | struct timespec mtime; |
158 | struct timespec ctime; |
159 | int32_t rdev; |
160 | struct nfsnode *np; |
161 | extern int (**spec_nfsv2nodeop_p)(void *); |
162 | uid_t uid; |
163 | gid_t gid; |
164 | |
165 | if (v3) { |
166 | vtyp = nfsv3tov_type(fp->fa_type); |
167 | vmode = fxdr_unsigned(u_short, fp->fa_mode); |
168 | rdev = makedev(fxdr_unsigned(u_int32_t, fp->fa3_rdev.specdata1), |
169 | fxdr_unsigned(u_int32_t, fp->fa3_rdev.specdata2)); |
170 | fxdr_nfsv3time(&fp->fa3_mtime, &mtime); |
171 | fxdr_nfsv3time(&fp->fa3_ctime, &ctime); |
172 | } else { |
173 | vtyp = nfsv2tov_type(fp->fa_type); |
174 | vmode = fxdr_unsigned(u_short, fp->fa_mode); |
175 | if (vtyp == VNON || vtyp == VREG) |
176 | vtyp = IFTOVT(vmode); |
177 | rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); |
178 | fxdr_nfsv2time(&fp->fa2_mtime, &mtime); |
179 | ctime.tv_sec = fxdr_unsigned(u_int32_t, |
180 | fp->fa2_ctime.nfsv2_sec); |
181 | ctime.tv_nsec = 0; |
182 | |
183 | /* |
184 | * Really ugly NFSv2 kludge. |
185 | */ |
186 | if (vtyp == VCHR && rdev == 0xffffffff) |
187 | vtyp = VFIFO; |
188 | } |
189 | |
190 | vmode &= ALLPERMS; |
191 | |
192 | /* |
193 | * If v_type == VNON it is a new node, so fill in the v_type, |
194 | * n_mtime fields. Check to see if it represents a special |
195 | * device, and if so, check for a possible alias. Once the |
196 | * correct vnode has been obtained, fill in the rest of the |
197 | * information. |
198 | */ |
199 | np = VTONFS(vp); |
200 | if (vp->v_type == VNON) { |
201 | vp->v_type = vtyp; |
202 | if (vp->v_type == VFIFO) { |
203 | extern int (**fifo_nfsv2nodeop_p)(void *); |
204 | vp->v_op = fifo_nfsv2nodeop_p; |
205 | } else if (vp->v_type == VREG) { |
206 | mutex_init(&np->n_commitlock, MUTEX_DEFAULT, IPL_NONE); |
207 | } else if (vp->v_type == VCHR || vp->v_type == VBLK) { |
208 | vp->v_op = spec_nfsv2nodeop_p; |
209 | spec_node_init(vp, (dev_t)rdev); |
210 | } |
211 | np->n_mtime = mtime; |
212 | } |
213 | uid = fxdr_unsigned(uid_t, fp->fa_uid); |
214 | gid = fxdr_unsigned(gid_t, fp->fa_gid); |
215 | vap = np->n_vattr; |
216 | |
217 | /* |
218 | * Invalidate access cache if uid, gid, mode or ctime changed. |
219 | */ |
220 | if (np->n_accstamp != -1 && |
221 | (gid != vap->va_gid || uid != vap->va_uid || vmode != vap->va_mode |
222 | || timespeccmp(&ctime, &vap->va_ctime, !=))) |
223 | np->n_accstamp = -1; |
224 | |
225 | vap->va_type = vtyp; |
226 | vap->va_mode = vmode; |
227 | vap->va_rdev = (dev_t)rdev; |
228 | vap->va_mtime = mtime; |
229 | vap->va_ctime = ctime; |
230 | vap->va_birthtime.tv_sec = VNOVAL; |
231 | vap->va_birthtime.tv_nsec = VNOVAL; |
232 | vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; |
233 | switch (vtyp) { |
234 | case VDIR: |
235 | vap->va_blocksize = NFS_DIRFRAGSIZ; |
236 | break; |
237 | case VBLK: |
238 | vap->va_blocksize = BLKDEV_IOSIZE; |
239 | break; |
240 | case VCHR: |
241 | vap->va_blocksize = MAXBSIZE; |
242 | break; |
243 | default: |
244 | vap->va_blocksize = v3 ? vp->v_mount->mnt_stat.f_iosize : |
245 | fxdr_unsigned(int32_t, fp->fa2_blocksize); |
246 | break; |
247 | } |
248 | if (v3) { |
249 | vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); |
250 | vap->va_uid = uid; |
251 | vap->va_gid = gid; |
252 | vap->va_size = fxdr_hyper(&fp->fa3_size); |
253 | vap->va_bytes = fxdr_hyper(&fp->fa3_used); |
254 | vap->va_fileid = fxdr_hyper(&fp->fa3_fileid); |
255 | fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); |
256 | vap->va_flags = 0; |
257 | vap->va_filerev = 0; |
258 | } else { |
259 | vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); |
260 | vap->va_uid = uid; |
261 | vap->va_gid = gid; |
262 | vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); |
263 | vap->va_bytes = fxdr_unsigned(int32_t, fp->fa2_blocks) |
264 | * NFS_FABLKSIZE; |
265 | vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); |
266 | fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); |
267 | vap->va_flags = 0; |
268 | vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); |
269 | vap->va_filerev = 0; |
270 | } |
271 | if (vap->va_size > VFSTONFS(vp->v_mount)->nm_maxfilesize) { |
272 | return EFBIG; |
273 | } |
274 | if (vap->va_size != np->n_size) { |
275 | if ((np->n_flag & NMODIFIED) && vap->va_size < np->n_size) { |
276 | vap->va_size = np->n_size; |
277 | } else { |
278 | np->n_size = vap->va_size; |
279 | if (vap->va_type == VREG) { |
280 | /* |
281 | * we can't free pages if NAC_NOTRUNC because |
282 | * the pages can be owned by ourselves. |
283 | */ |
284 | if (flags & NAC_NOTRUNC) { |
285 | np->n_flag |= NTRUNCDELAYED; |
286 | } else { |
287 | genfs_node_wrlock(vp); |
288 | mutex_enter(vp->v_interlock); |
289 | (void)VOP_PUTPAGES(vp, 0, |
290 | 0, PGO_SYNCIO | PGO_CLEANIT | |
291 | PGO_FREE | PGO_ALLPAGES); |
292 | uvm_vnp_setsize(vp, np->n_size); |
293 | genfs_node_unlock(vp); |
294 | } |
295 | } |
296 | } |
297 | } |
298 | np->n_attrstamp = time_second; |
299 | if (vaper != NULL) { |
300 | memcpy((void *)vaper, (void *)vap, sizeof(*vap)); |
301 | if (np->n_flag & NCHG) { |
302 | if (np->n_flag & NACC) |
303 | vaper->va_atime = np->n_atim; |
304 | if (np->n_flag & NUPD) |
305 | vaper->va_mtime = np->n_mtim; |
306 | } |
307 | } |
308 | return (0); |
309 | } |
310 | |
311 | /* |
312 | * Check the time stamp |
313 | * If the cache is valid, copy contents to *vap and return 0 |
314 | * otherwise return an error |
315 | */ |
316 | int |
317 | nfs_getattrcache(struct vnode *vp, struct vattr *vaper) |
318 | { |
319 | struct nfsnode *np = VTONFS(vp); |
320 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
321 | struct vattr *vap; |
322 | |
323 | if (np->n_attrstamp == 0 || |
324 | (time_second - np->n_attrstamp) >= nfs_attrtimeo(nmp, np)) { |
325 | nfsstats.attrcache_misses++; |
326 | return (ENOENT); |
327 | } |
328 | nfsstats.attrcache_hits++; |
329 | vap = np->n_vattr; |
330 | if (vap->va_size != np->n_size) { |
331 | if (vap->va_type == VREG) { |
332 | if ((np->n_flag & NMODIFIED) != 0 && |
333 | vap->va_size < np->n_size) { |
334 | vap->va_size = np->n_size; |
335 | } else { |
336 | np->n_size = vap->va_size; |
337 | } |
338 | genfs_node_wrlock(vp); |
339 | uvm_vnp_setsize(vp, np->n_size); |
340 | genfs_node_unlock(vp); |
341 | } else |
342 | np->n_size = vap->va_size; |
343 | } |
344 | memcpy((void *)vaper, (void *)vap, sizeof(struct vattr)); |
345 | if (np->n_flag & NCHG) { |
346 | if (np->n_flag & NACC) |
347 | vaper->va_atime = np->n_atim; |
348 | if (np->n_flag & NUPD) |
349 | vaper->va_mtime = np->n_mtim; |
350 | } |
351 | return (0); |
352 | } |
353 | |
354 | void |
355 | nfs_delayedtruncate(struct vnode *vp) |
356 | { |
357 | struct nfsnode *np = VTONFS(vp); |
358 | |
359 | if (np->n_flag & NTRUNCDELAYED) { |
360 | np->n_flag &= ~NTRUNCDELAYED; |
361 | genfs_node_wrlock(vp); |
362 | mutex_enter(vp->v_interlock); |
363 | (void)VOP_PUTPAGES(vp, 0, |
364 | 0, PGO_SYNCIO | PGO_CLEANIT | PGO_FREE | PGO_ALLPAGES); |
365 | uvm_vnp_setsize(vp, np->n_size); |
366 | genfs_node_unlock(vp); |
367 | } |
368 | } |
369 | |
370 | #define NFS_WCCKLUDGE_TIMEOUT (24 * 60 * 60) /* 1 day */ |
371 | #define NFS_WCCKLUDGE(nmp, now) \ |
372 | (((nmp)->nm_iflag & NFSMNT_WCCKLUDGE) && \ |
373 | ((now) - (nmp)->nm_wcckludgetime - NFS_WCCKLUDGE_TIMEOUT) < 0) |
374 | |
375 | /* |
376 | * nfs_check_wccdata: check inaccurate wcc_data |
377 | * |
378 | * => return non-zero if we shouldn't trust the wcc_data. |
379 | * => NFS_WCCKLUDGE_TIMEOUT is for the case that the server is "fixed". |
380 | */ |
381 | |
382 | int |
383 | nfs_check_wccdata(struct nfsnode *np, const struct timespec *ctime, |
384 | struct timespec *mtime, bool docheck) |
385 | { |
386 | int error = 0; |
387 | |
388 | #if !defined(NFS_V2_ONLY) |
389 | |
390 | if (docheck) { |
391 | struct vnode *vp = NFSTOV(np); |
392 | struct nfsmount *nmp; |
393 | long now = time_second; |
394 | const struct timespec *omtime = &np->n_vattr->va_mtime; |
395 | const struct timespec *octime = &np->n_vattr->va_ctime; |
396 | const char *reason = NULL; /* XXX: gcc */ |
397 | |
398 | if (timespeccmp(omtime, mtime, <=)) { |
399 | reason = "mtime" ; |
400 | error = EINVAL; |
401 | } |
402 | |
403 | if (vp->v_type == VDIR && timespeccmp(octime, ctime, <=)) { |
404 | reason = "ctime" ; |
405 | error = EINVAL; |
406 | } |
407 | |
408 | nmp = VFSTONFS(vp->v_mount); |
409 | if (error) { |
410 | |
411 | /* |
412 | * despite of the fact that we've updated the file, |
413 | * timestamps of the file were not updated as we |
414 | * expected. |
415 | * it means that the server has incompatible |
416 | * semantics of timestamps or (more likely) |
417 | * the server time is not precise enough to |
418 | * track each modifications. |
419 | * in that case, we disable wcc processing. |
420 | * |
421 | * yes, strictly speaking, we should disable all |
422 | * caching. it's a compromise. |
423 | */ |
424 | |
425 | mutex_enter(&nmp->nm_lock); |
426 | if (!NFS_WCCKLUDGE(nmp, now)) { |
427 | printf("%s: inaccurate wcc data (%s) detected," |
428 | " disabling wcc" |
429 | " (ctime %u.%09u %u.%09u," |
430 | " mtime %u.%09u %u.%09u)\n" , |
431 | vp->v_mount->mnt_stat.f_mntfromname, |
432 | reason, |
433 | (unsigned int)octime->tv_sec, |
434 | (unsigned int)octime->tv_nsec, |
435 | (unsigned int)ctime->tv_sec, |
436 | (unsigned int)ctime->tv_nsec, |
437 | (unsigned int)omtime->tv_sec, |
438 | (unsigned int)omtime->tv_nsec, |
439 | (unsigned int)mtime->tv_sec, |
440 | (unsigned int)mtime->tv_nsec); |
441 | } |
442 | nmp->nm_iflag |= NFSMNT_WCCKLUDGE; |
443 | nmp->nm_wcckludgetime = now; |
444 | mutex_exit(&nmp->nm_lock); |
445 | } else if (NFS_WCCKLUDGE(nmp, now)) { |
446 | error = EPERM; /* XXX */ |
447 | } else if (nmp->nm_iflag & NFSMNT_WCCKLUDGE) { |
448 | mutex_enter(&nmp->nm_lock); |
449 | if (nmp->nm_iflag & NFSMNT_WCCKLUDGE) { |
450 | printf("%s: re-enabling wcc\n" , |
451 | vp->v_mount->mnt_stat.f_mntfromname); |
452 | nmp->nm_iflag &= ~NFSMNT_WCCKLUDGE; |
453 | } |
454 | mutex_exit(&nmp->nm_lock); |
455 | } |
456 | } |
457 | |
458 | #endif /* !defined(NFS_V2_ONLY) */ |
459 | |
460 | return error; |
461 | } |
462 | |
463 | /* |
464 | * Heuristic to see if the server XDR encodes directory cookies or not. |
465 | * it is not supposed to, but a lot of servers may do this. Also, since |
466 | * most/all servers will implement V2 as well, it is expected that they |
467 | * may return just 32 bits worth of cookie information, so we need to |
468 | * find out in which 32 bits this information is available. We do this |
469 | * to avoid trouble with emulated binaries that can't handle 64 bit |
470 | * directory offsets. |
471 | */ |
472 | |
473 | void |
474 | nfs_cookieheuristic(struct vnode *vp, int *flagp, struct lwp *l, kauth_cred_t cred) |
475 | { |
476 | struct uio auio; |
477 | struct iovec aiov; |
478 | char *tbuf, *cp; |
479 | struct dirent *dp; |
480 | off_t *cookies = NULL, *cop; |
481 | int error, eof, nc, len; |
482 | |
483 | tbuf = malloc(NFS_DIRFRAGSIZ, M_TEMP, M_WAITOK); |
484 | |
485 | aiov.iov_base = tbuf; |
486 | aiov.iov_len = NFS_DIRFRAGSIZ; |
487 | auio.uio_iov = &aiov; |
488 | auio.uio_iovcnt = 1; |
489 | auio.uio_rw = UIO_READ; |
490 | auio.uio_resid = NFS_DIRFRAGSIZ; |
491 | auio.uio_offset = 0; |
492 | UIO_SETUP_SYSSPACE(&auio); |
493 | |
494 | error = VOP_READDIR(vp, &auio, cred, &eof, &cookies, &nc); |
495 | |
496 | len = NFS_DIRFRAGSIZ - auio.uio_resid; |
497 | if (error || len == 0) { |
498 | free(tbuf, M_TEMP); |
499 | if (cookies) |
500 | free(cookies, M_TEMP); |
501 | return; |
502 | } |
503 | |
504 | /* |
505 | * Find the first valid entry and look at its offset cookie. |
506 | */ |
507 | |
508 | cp = tbuf; |
509 | for (cop = cookies; len > 0; len -= dp->d_reclen) { |
510 | dp = (struct dirent *)cp; |
511 | if (dp->d_fileno != 0 && len >= dp->d_reclen) { |
512 | if ((*cop >> 32) != 0 && (*cop & 0xffffffffLL) == 0) { |
513 | *flagp |= NFSMNT_SWAPCOOKIE; |
514 | nfs_invaldircache(vp, 0); |
515 | nfs_vinvalbuf(vp, 0, cred, l, 1); |
516 | } |
517 | break; |
518 | } |
519 | cop++; |
520 | cp += dp->d_reclen; |
521 | } |
522 | |
523 | free(tbuf, M_TEMP); |
524 | free(cookies, M_TEMP); |
525 | } |
526 | |
527 | /* |
528 | * Set the attribute timeout based on how recently the file has been modified. |
529 | */ |
530 | |
531 | time_t |
532 | nfs_attrtimeo(struct nfsmount *nmp, struct nfsnode *np) |
533 | { |
534 | time_t timeo; |
535 | |
536 | if ((nmp->nm_flag & NFSMNT_NOAC) != 0) |
537 | return 0; |
538 | |
539 | if (((np)->n_flag & NMODIFIED) != 0) |
540 | return NFS_MINATTRTIMO; |
541 | |
542 | timeo = (time_second - np->n_mtime.tv_sec) / 10; |
543 | timeo = max(timeo, NFS_MINATTRTIMO); |
544 | timeo = min(timeo, NFS_MAXATTRTIMO); |
545 | return timeo; |
546 | } |
547 | |