37
38/*
39 * vnode op calls for Sun NFS version 2, 3 and 4
40 */
41
42#include "opt_kdtrace.h"
43#include "opt_inet.h"
44
45#include <sys/param.h>
46#include <sys/kernel.h>
47#include <sys/systm.h>
48#include <sys/resourcevar.h>
49#include <sys/proc.h>
50#include <sys/mount.h>
51#include <sys/bio.h>
52#include <sys/buf.h>
53#include <sys/jail.h>
54#include <sys/malloc.h>
55#include <sys/mbuf.h>
56#include <sys/namei.h>
57#include <sys/socket.h>
58#include <sys/vnode.h>
59#include <sys/dirent.h>
60#include <sys/fcntl.h>
61#include <sys/lockf.h>
62#include <sys/stat.h>
63#include <sys/sysctl.h>
64#include <sys/signalvar.h>
65
66#include <vm/vm.h>
67#include <vm/vm_extern.h>
68#include <vm/vm_object.h>
69
70#include <fs/nfs/nfsport.h>
71#include <fs/nfsclient/nfsnode.h>
72#include <fs/nfsclient/nfsmount.h>
73#include <fs/nfsclient/nfs.h>
74#include <fs/nfsclient/nfs_kdtrace.h>
75
76#include <net/if.h>
77#include <netinet/in.h>
78#include <netinet/in_var.h>
79
80#include <nfs/nfs_lock.h>
81
82#ifdef KDTRACE_HOOKS
83#include <sys/dtrace_bsd.h>
84
85dtrace_nfsclient_accesscache_flush_probe_func_t
86 dtrace_nfscl_accesscache_flush_done_probe;
87uint32_t nfscl_accesscache_flush_done_id;
88
89dtrace_nfsclient_accesscache_get_probe_func_t
90 dtrace_nfscl_accesscache_get_hit_probe,
91 dtrace_nfscl_accesscache_get_miss_probe;
92uint32_t nfscl_accesscache_get_hit_id;
93uint32_t nfscl_accesscache_get_miss_id;
94
95dtrace_nfsclient_accesscache_load_probe_func_t
96 dtrace_nfscl_accesscache_load_done_probe;
97uint32_t nfscl_accesscache_load_done_id;
98#endif /* !KDTRACE_HOOKS */
99
100/* Defs */
101#define TRUE 1
102#define FALSE 0
103
104extern struct nfsstats newnfsstats;
105extern int nfsrv_useacl;
106MALLOC_DECLARE(M_NEWNFSREQ);
107
108/*
109 * Ifdef for FreeBSD-current merged buffer cache. It is unfortunate that these
110 * calls are not in getblk() and brelse() so that they would not be necessary
111 * here.
112 */
113#ifndef B_VMIO
114#define vfs_busy_pages(bp, f)
115#endif
116
117static vop_read_t nfsfifo_read;
118static vop_write_t nfsfifo_write;
119static vop_close_t nfsfifo_close;
120static int nfs_setattrrpc(struct vnode *, struct vattr *, struct ucred *,
121 struct thread *);
122static vop_lookup_t nfs_lookup;
123static vop_create_t nfs_create;
124static vop_mknod_t nfs_mknod;
125static vop_open_t nfs_open;
126static vop_pathconf_t nfs_pathconf;
127static vop_close_t nfs_close;
128static vop_access_t nfs_access;
129static vop_getattr_t nfs_getattr;
130static vop_setattr_t nfs_setattr;
131static vop_read_t nfs_read;
132static vop_fsync_t nfs_fsync;
133static vop_remove_t nfs_remove;
134static vop_link_t nfs_link;
135static vop_rename_t nfs_rename;
136static vop_mkdir_t nfs_mkdir;
137static vop_rmdir_t nfs_rmdir;
138static vop_symlink_t nfs_symlink;
139static vop_readdir_t nfs_readdir;
140static vop_strategy_t nfs_strategy;
141static vop_lock1_t nfs_lock1;
142static int nfs_lookitup(struct vnode *, char *, int,
143 struct ucred *, struct thread *, struct nfsnode **);
144static int nfs_sillyrename(struct vnode *, struct vnode *,
145 struct componentname *);
146static vop_access_t nfsspec_access;
147static vop_readlink_t nfs_readlink;
148static vop_print_t nfs_print;
149static vop_advlock_t nfs_advlock;
150static vop_advlockasync_t nfs_advlockasync;
151static vop_getacl_t nfs_getacl;
152static vop_setacl_t nfs_setacl;
153
154/*
155 * Global vfs data structures for nfs
156 */
157struct vop_vector newnfs_vnodeops = {
158 .vop_default = &default_vnodeops,
159 .vop_access = nfs_access,
160 .vop_advlock = nfs_advlock,
161 .vop_advlockasync = nfs_advlockasync,
162 .vop_close = nfs_close,
163 .vop_create = nfs_create,
164 .vop_fsync = nfs_fsync,
165 .vop_getattr = nfs_getattr,
166 .vop_getpages = ncl_getpages,
167 .vop_putpages = ncl_putpages,
168 .vop_inactive = ncl_inactive,
169 .vop_link = nfs_link,
170 .vop_lock1 = nfs_lock1,
171 .vop_lookup = nfs_lookup,
172 .vop_mkdir = nfs_mkdir,
173 .vop_mknod = nfs_mknod,
174 .vop_open = nfs_open,
175 .vop_pathconf = nfs_pathconf,
176 .vop_print = nfs_print,
177 .vop_read = nfs_read,
178 .vop_readdir = nfs_readdir,
179 .vop_readlink = nfs_readlink,
180 .vop_reclaim = ncl_reclaim,
181 .vop_remove = nfs_remove,
182 .vop_rename = nfs_rename,
183 .vop_rmdir = nfs_rmdir,
184 .vop_setattr = nfs_setattr,
185 .vop_strategy = nfs_strategy,
186 .vop_symlink = nfs_symlink,
187 .vop_write = ncl_write,
188 .vop_getacl = nfs_getacl,
189 .vop_setacl = nfs_setacl,
190};
191
192struct vop_vector newnfs_fifoops = {
193 .vop_default = &fifo_specops,
194 .vop_access = nfsspec_access,
195 .vop_close = nfsfifo_close,
196 .vop_fsync = nfs_fsync,
197 .vop_getattr = nfs_getattr,
198 .vop_inactive = ncl_inactive,
199 .vop_print = nfs_print,
200 .vop_read = nfsfifo_read,
201 .vop_reclaim = ncl_reclaim,
202 .vop_setattr = nfs_setattr,
203 .vop_write = nfsfifo_write,
204};
205
206static int nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp,
207 struct componentname *cnp, struct vattr *vap);
208static int nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
209 int namelen, struct ucred *cred, struct thread *td);
210static int nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp,
211 char *fnameptr, int fnamelen, struct vnode *tdvp, struct vnode *tvp,
212 char *tnameptr, int tnamelen, struct ucred *cred, struct thread *td);
213static int nfs_renameit(struct vnode *sdvp, struct vnode *svp,
214 struct componentname *scnp, struct sillyrename *sp);
215
216/*
217 * Global variables
218 */
219#define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1))
220
221SYSCTL_DECL(_vfs_nfs);
222
223static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO;
224SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
225 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
226
227static int nfs_prime_access_cache = 0;
228SYSCTL_INT(_vfs_nfs, OID_AUTO, prime_access_cache, CTLFLAG_RW,
229 &nfs_prime_access_cache, 0,
230 "Prime NFS ACCESS cache when fetching attributes");
231
232static int newnfs_commit_on_close = 0;
233SYSCTL_INT(_vfs_nfs, OID_AUTO, commit_on_close, CTLFLAG_RW,
234 &newnfs_commit_on_close, 0, "write+commit on close, else only write");
235
236static int nfs_clean_pages_on_close = 1;
237SYSCTL_INT(_vfs_nfs, OID_AUTO, clean_pages_on_close, CTLFLAG_RW,
238 &nfs_clean_pages_on_close, 0, "NFS clean dirty pages on close");
239
240int newnfs_directio_enable = 0;
241SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_directio_enable, CTLFLAG_RW,
242 &newnfs_directio_enable, 0, "Enable NFS directio");
243
244/*
245 * This sysctl allows other processes to mmap a file that has been opened
246 * O_DIRECT by a process. In general, having processes mmap the file while
247 * Direct IO is in progress can lead to Data Inconsistencies. But, we allow
248 * this by default to prevent DoS attacks - to prevent a malicious user from
249 * opening up files O_DIRECT preventing other users from mmap'ing these
250 * files. "Protected" environments where stricter consistency guarantees are
251 * required can disable this knob. The process that opened the file O_DIRECT
252 * cannot mmap() the file, because mmap'ed IO on an O_DIRECT open() is not
253 * meaningful.
254 */
255int newnfs_directio_allow_mmap = 1;
256SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_directio_allow_mmap, CTLFLAG_RW,
257 &newnfs_directio_allow_mmap, 0, "Enable mmaped IO on file with O_DIRECT opens");
258
259#if 0
260SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
261 &newnfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
262
263SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
264 &newnfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
265#endif
266
267#define NFSACCESS_ALL (NFSACCESS_READ | NFSACCESS_MODIFY \
268 | NFSACCESS_EXTEND | NFSACCESS_EXECUTE \
269 | NFSACCESS_DELETE | NFSACCESS_LOOKUP)
270
271/*
272 * SMP Locking Note :
273 * The list of locks after the description of the lock is the ordering
274 * of other locks acquired with the lock held.
275 * np->n_mtx : Protects the fields in the nfsnode.
276 VM Object Lock
277 VI_MTX (acquired indirectly)
278 * nmp->nm_mtx : Protects the fields in the nfsmount.
279 rep->r_mtx
280 * ncl_iod_mutex : Global lock, protects shared nfsiod state.
281 * nfs_reqq_mtx : Global lock, protects the nfs_reqq list.
282 nmp->nm_mtx
283 rep->r_mtx
284 * rep->r_mtx : Protects the fields in an nfsreq.
285 */
286
287static int
288nfs34_access_otw(struct vnode *vp, int wmode, struct thread *td,
289 struct ucred *cred, u_int32_t *retmode)
290{
291 int error = 0, attrflag, i, lrupos;
292 u_int32_t rmode;
293 struct nfsnode *np = VTONFS(vp);
294 struct nfsvattr nfsva;
295
296 error = nfsrpc_accessrpc(vp, wmode, cred, td, &nfsva, &attrflag,
297 &rmode, NULL);
298 if (attrflag)
299 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
300 if (!error) {
301 lrupos = 0;
302 mtx_lock(&np->n_mtx);
303 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) {
304 if (np->n_accesscache[i].uid == cred->cr_uid) {
305 np->n_accesscache[i].mode = rmode;
306 np->n_accesscache[i].stamp = time_second;
307 break;
308 }
309 if (i > 0 && np->n_accesscache[i].stamp <
310 np->n_accesscache[lrupos].stamp)
311 lrupos = i;
312 }
313 if (i == NFS_ACCESSCACHESIZE) {
314 np->n_accesscache[lrupos].uid = cred->cr_uid;
315 np->n_accesscache[lrupos].mode = rmode;
316 np->n_accesscache[lrupos].stamp = time_second;
317 }
318 mtx_unlock(&np->n_mtx);
319 if (retmode != NULL)
320 *retmode = rmode;
321 KDTRACE_NFS_ACCESSCACHE_LOAD_DONE(vp, cred->cr_uid, rmode, 0);
322 } else if (NFS_ISV4(vp)) {
323 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
324 }
325#ifdef KDTRACE_HOOKS
326 if (error != 0)
327 KDTRACE_NFS_ACCESSCACHE_LOAD_DONE(vp, cred->cr_uid, 0,
328 error);
329#endif
330 return (error);
331}
332
333/*
334 * nfs access vnode op.
335 * For nfs version 2, just return ok. File accesses may fail later.
336 * For nfs version 3, use the access rpc to check accessibility. If file modes
337 * are changed on the server, accesses might still fail later.
338 */
339static int
340nfs_access(struct vop_access_args *ap)
341{
342 struct vnode *vp = ap->a_vp;
343 int error = 0, i, gotahit;
344 u_int32_t mode, wmode, rmode;
345 int v34 = NFS_ISV34(vp);
346 struct nfsnode *np = VTONFS(vp);
347
348 /*
349 * Disallow write attempts on filesystems mounted read-only;
350 * unless the file is a socket, fifo, or a block or character
351 * device resident on the filesystem.
352 */
353 if ((ap->a_accmode & (VWRITE | VAPPEND | VWRITE_NAMED_ATTRS |
354 VDELETE_CHILD | VWRITE_ATTRIBUTES | VDELETE | VWRITE_ACL |
355 VWRITE_OWNER)) != 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) != 0) {
356 switch (vp->v_type) {
357 case VREG:
358 case VDIR:
359 case VLNK:
360 return (EROFS);
361 default:
362 break;
363 }
364 }
365 /*
366 * For nfs v3 or v4, check to see if we have done this recently, and if
367 * so return our cached result instead of making an ACCESS call.
368 * If not, do an access rpc, otherwise you are stuck emulating
369 * ufs_access() locally using the vattr. This may not be correct,
370 * since the server may apply other access criteria such as
371 * client uid-->server uid mapping that we do not know about.
372 */
373 if (v34) {
374 if (ap->a_accmode & VREAD)
375 mode = NFSACCESS_READ;
376 else
377 mode = 0;
378 if (vp->v_type != VDIR) {
379 if (ap->a_accmode & VWRITE)
380 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
381 if (ap->a_accmode & VAPPEND)
382 mode |= NFSACCESS_EXTEND;
383 if (ap->a_accmode & VEXEC)
384 mode |= NFSACCESS_EXECUTE;
385 if (ap->a_accmode & VDELETE)
386 mode |= NFSACCESS_DELETE;
387 } else {
388 if (ap->a_accmode & VWRITE)
389 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
390 if (ap->a_accmode & VAPPEND)
391 mode |= NFSACCESS_EXTEND;
392 if (ap->a_accmode & VEXEC)
393 mode |= NFSACCESS_LOOKUP;
394 if (ap->a_accmode & VDELETE)
395 mode |= NFSACCESS_DELETE;
396 if (ap->a_accmode & VDELETE_CHILD)
397 mode |= NFSACCESS_MODIFY;
398 }
399 /* XXX safety belt, only make blanket request if caching */
400 if (nfsaccess_cache_timeout > 0) {
401 wmode = NFSACCESS_READ | NFSACCESS_MODIFY |
402 NFSACCESS_EXTEND | NFSACCESS_EXECUTE |
403 NFSACCESS_DELETE | NFSACCESS_LOOKUP;
404 } else {
405 wmode = mode;
406 }
407
408 /*
409 * Does our cached result allow us to give a definite yes to
410 * this request?
411 */
412 gotahit = 0;
413 mtx_lock(&np->n_mtx);
414 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) {
415 if (ap->a_cred->cr_uid == np->n_accesscache[i].uid) {
416 if (time_second < (np->n_accesscache[i].stamp
417 + nfsaccess_cache_timeout) &&
418 (np->n_accesscache[i].mode & mode) == mode) {
419 NFSINCRGLOBAL(newnfsstats.accesscache_hits);
420 gotahit = 1;
421 }
422 break;
423 }
424 }
425 mtx_unlock(&np->n_mtx);
426#ifdef KDTRACE_HOOKS
427 if (gotahit != 0)
428 KDTRACE_NFS_ACCESSCACHE_GET_HIT(vp,
429 ap->a_cred->cr_uid, mode);
430 else
431 KDTRACE_NFS_ACCESSCACHE_GET_MISS(vp,
432 ap->a_cred->cr_uid, mode);
433#endif
434 if (gotahit == 0) {
435 /*
436 * Either a no, or a don't know. Go to the wire.
437 */
438 NFSINCRGLOBAL(newnfsstats.accesscache_misses);
439 error = nfs34_access_otw(vp, wmode, ap->a_td,
440 ap->a_cred, &rmode);
441 if (!error &&
442 (rmode & mode) != mode)
443 error = EACCES;
444 }
445 return (error);
446 } else {
447 if ((error = nfsspec_access(ap)) != 0) {
448 return (error);
449 }
450 /*
451 * Attempt to prevent a mapped root from accessing a file
452 * which it shouldn't. We try to read a byte from the file
453 * if the user is root and the file is not zero length.
454 * After calling nfsspec_access, we should have the correct
455 * file size cached.
456 */
457 mtx_lock(&np->n_mtx);
458 if (ap->a_cred->cr_uid == 0 && (ap->a_accmode & VREAD)
459 && VTONFS(vp)->n_size > 0) {
460 struct iovec aiov;
461 struct uio auio;
462 char buf[1];
463
464 mtx_unlock(&np->n_mtx);
465 aiov.iov_base = buf;
466 aiov.iov_len = 1;
467 auio.uio_iov = &aiov;
468 auio.uio_iovcnt = 1;
469 auio.uio_offset = 0;
470 auio.uio_resid = 1;
471 auio.uio_segflg = UIO_SYSSPACE;
472 auio.uio_rw = UIO_READ;
473 auio.uio_td = ap->a_td;
474
475 if (vp->v_type == VREG)
476 error = ncl_readrpc(vp, &auio, ap->a_cred);
477 else if (vp->v_type == VDIR) {
478 char* bp;
479 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
480 aiov.iov_base = bp;
481 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
482 error = ncl_readdirrpc(vp, &auio, ap->a_cred,
483 ap->a_td);
484 free(bp, M_TEMP);
485 } else if (vp->v_type == VLNK)
486 error = ncl_readlinkrpc(vp, &auio, ap->a_cred);
487 else
488 error = EACCES;
489 } else
490 mtx_unlock(&np->n_mtx);
491 return (error);
492 }
493}
494
495
496/*
497 * nfs open vnode op
498 * Check to see if the type is ok
499 * and that deletion is not in progress.
500 * For paged in text files, you will need to flush the page cache
501 * if consistency is lost.
502 */
503/* ARGSUSED */
504static int
505nfs_open(struct vop_open_args *ap)
506{
507 struct vnode *vp = ap->a_vp;
508 struct nfsnode *np = VTONFS(vp);
509 struct vattr vattr;
510 int error;
511 int fmode = ap->a_mode;
512
513 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK)
514 return (EOPNOTSUPP);
515
516 /*
517 * For NFSv4, we need to do the Open Op before cache validation,
518 * so that we conform to RFC3530 Sec. 9.3.1.
519 */
520 if (NFS_ISV4(vp)) {
521 error = nfsrpc_open(vp, fmode, ap->a_cred, ap->a_td);
522 if (error) {
523 error = nfscl_maperr(ap->a_td, error, (uid_t)0,
524 (gid_t)0);
525 return (error);
526 }
527 }
528
529 /*
530 * Now, if this Open will be doing reading, re-validate/flush the
531 * cache, so that Close/Open coherency is maintained.
532 */
533 mtx_lock(&np->n_mtx);
534 if (np->n_flag & NMODIFIED) {
535 mtx_unlock(&np->n_mtx);
536 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
537 if (error == EINTR || error == EIO) {
538 if (NFS_ISV4(vp))
539 (void) nfsrpc_close(vp, 0, ap->a_td);
540 return (error);
541 }
542 mtx_lock(&np->n_mtx);
543 np->n_attrstamp = 0;
544 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
545 if (vp->v_type == VDIR)
546 np->n_direofoffset = 0;
547 mtx_unlock(&np->n_mtx);
548 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
549 if (error) {
550 if (NFS_ISV4(vp))
551 (void) nfsrpc_close(vp, 0, ap->a_td);
552 return (error);
553 }
554 mtx_lock(&np->n_mtx);
555 np->n_mtime = vattr.va_mtime;
556 if (NFS_ISV4(vp))
557 np->n_change = vattr.va_filerev;
558 } else {
559 mtx_unlock(&np->n_mtx);
560 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
561 if (error) {
562 if (NFS_ISV4(vp))
563 (void) nfsrpc_close(vp, 0, ap->a_td);
564 return (error);
565 }
566 mtx_lock(&np->n_mtx);
567 if ((NFS_ISV4(vp) && np->n_change != vattr.va_filerev) ||
568 NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
569 if (vp->v_type == VDIR)
570 np->n_direofoffset = 0;
571 mtx_unlock(&np->n_mtx);
572 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
573 if (error == EINTR || error == EIO) {
574 if (NFS_ISV4(vp))
575 (void) nfsrpc_close(vp, 0, ap->a_td);
576 return (error);
577 }
578 mtx_lock(&np->n_mtx);
579 np->n_mtime = vattr.va_mtime;
580 if (NFS_ISV4(vp))
581 np->n_change = vattr.va_filerev;
582 }
583 }
584
585 /*
586 * If the object has >= 1 O_DIRECT active opens, we disable caching.
587 */
588 if (newnfs_directio_enable && (fmode & O_DIRECT) &&
589 (vp->v_type == VREG)) {
590 if (np->n_directio_opens == 0) {
591 mtx_unlock(&np->n_mtx);
592 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
593 if (error) {
594 if (NFS_ISV4(vp))
595 (void) nfsrpc_close(vp, 0, ap->a_td);
596 return (error);
597 }
598 mtx_lock(&np->n_mtx);
599 np->n_flag |= NNONCACHE;
600 }
601 np->n_directio_opens++;
602 }
603 mtx_unlock(&np->n_mtx);
604 vnode_create_vobject(vp, vattr.va_size, ap->a_td);
605 return (0);
606}
607
608/*
609 * nfs close vnode op
610 * What an NFS client should do upon close after writing is a debatable issue.
611 * Most NFS clients push delayed writes to the server upon close, basically for
612 * two reasons:
613 * 1 - So that any write errors may be reported back to the client process
614 * doing the close system call. By far the two most likely errors are
615 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
616 * 2 - To put a worst case upper bound on cache inconsistency between
617 * multiple clients for the file.
618 * There is also a consistency problem for Version 2 of the protocol w.r.t.
619 * not being able to tell if other clients are writing a file concurrently,
620 * since there is no way of knowing if the changed modify time in the reply
621 * is only due to the write for this client.
622 * (NFS Version 3 provides weak cache consistency data in the reply that
623 * should be sufficient to detect and handle this case.)
624 *
625 * The current code does the following:
626 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
627 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
628 * or commit them (this satisfies 1 and 2 except for the
629 * case where the server crashes after this close but
630 * before the commit RPC, which is felt to be "good
631 * enough". Changing the last argument to ncl_flush() to
632 * a 1 would force a commit operation, if it is felt a
633 * commit is necessary now.
634 * for NFS Version 4 - flush the dirty buffers and commit them, if
635 * nfscl_mustflush() says this is necessary.
636 * It is necessary if there is no write delegation held,
637 * in order to satisfy open/close coherency.
638 * If the file isn't cached on local stable storage,
639 * it may be necessary in order to detect "out of space"
640 * errors from the server, if the write delegation
641 * issued by the server doesn't allow the file to grow.
642 */
643/* ARGSUSED */
644static int
645nfs_close(struct vop_close_args *ap)
646{
647 struct vnode *vp = ap->a_vp;
648 struct nfsnode *np = VTONFS(vp);
649 struct nfsvattr nfsva;
650 struct ucred *cred;
651 int error = 0, ret, localcred = 0;
652 int fmode = ap->a_fflag;
653
654 if ((vp->v_mount->mnt_kern_flag & MNTK_UNMOUNTF))
655 return (0);
656 /*
657 * During shutdown, a_cred isn't valid, so just use root.
658 */
659 if (ap->a_cred == NOCRED) {
660 cred = newnfs_getcred();
661 localcred = 1;
662 } else {
663 cred = ap->a_cred;
664 }
665 if (vp->v_type == VREG) {
666 /*
667 * Examine and clean dirty pages, regardless of NMODIFIED.
668 * This closes a major hole in close-to-open consistency.
669 * We want to push out all dirty pages (and buffers) on
670 * close, regardless of whether they were dirtied by
671 * mmap'ed writes or via write().
672 */
673 if (nfs_clean_pages_on_close && vp->v_object) {
674 VM_OBJECT_LOCK(vp->v_object);
675 vm_object_page_clean(vp->v_object, 0, 0, 0);
676 VM_OBJECT_UNLOCK(vp->v_object);
677 }
678 mtx_lock(&np->n_mtx);
679 if (np->n_flag & NMODIFIED) {
680 mtx_unlock(&np->n_mtx);
681 if (NFS_ISV3(vp)) {
682 /*
683 * Under NFSv3 we have dirty buffers to dispose of. We
684 * must flush them to the NFS server. We have the option
685 * of waiting all the way through the commit rpc or just
686 * waiting for the initial write. The default is to only
687 * wait through the initial write so the data is in the
688 * server's cache, which is roughly similar to the state
689 * a standard disk subsystem leaves the file in on close().
690 *
691 * We cannot clear the NMODIFIED bit in np->n_flag due to
692 * potential races with other processes, and certainly
693 * cannot clear it if we don't commit.
694 * These races occur when there is no longer the old
695 * traditional vnode locking implemented for Vnode Ops.
696 */
697 int cm = newnfs_commit_on_close ? 1 : 0;
698 error = ncl_flush(vp, MNT_WAIT, cred, ap->a_td, cm, 0);
699 /* np->n_flag &= ~NMODIFIED; */
700 } else if (NFS_ISV4(vp)) {
701 if (nfscl_mustflush(vp) != 0) {
702 int cm = newnfs_commit_on_close ? 1 : 0;
703 error = ncl_flush(vp, MNT_WAIT, cred, ap->a_td,
704 cm, 0);
705 /*
706 * as above w.r.t races when clearing
707 * NMODIFIED.
708 * np->n_flag &= ~NMODIFIED;
709 */
710 }
711 } else
712 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
713 mtx_lock(&np->n_mtx);
714 }
715 /*
716 * Invalidate the attribute cache in all cases.
717 * An open is going to fetch fresh attrs any way, other procs
718 * on this node that have file open will be forced to do an
719 * otw attr fetch, but this is safe.
720 * --> A user found that their RPC count dropped by 20% when
721 * this was commented out and I can't see any requirement
722 * for it, so I've disabled it when negative lookups are
723 * enabled. (What does this have to do with negative lookup
724 * caching? Well nothing, except it was reported by the
725 * same user that needed negative lookup caching and I wanted
726 * there to be a way to disable it to see if it
727 * is the cause of some caching/coherency issue that might
728 * crop up.)
729 */
730 if (VFSTONFS(vp->v_mount)->nm_negnametimeo == 0) {
731 np->n_attrstamp = 0;
732 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
733 }
734 if (np->n_flag & NWRITEERR) {
735 np->n_flag &= ~NWRITEERR;
736 error = np->n_error;
737 }
738 mtx_unlock(&np->n_mtx);
739 }
740
741 if (NFS_ISV4(vp)) {
742 /*
743 * Get attributes so "change" is up to date.
744 */
745 if (error == 0 && nfscl_mustflush(vp) != 0) {
746 ret = nfsrpc_getattr(vp, cred, ap->a_td, &nfsva,
747 NULL);
748 if (!ret) {
749 np->n_change = nfsva.na_filerev;
750 (void) nfscl_loadattrcache(&vp, &nfsva, NULL,
751 NULL, 0, 0);
752 }
753 }
754
755 /*
756 * and do the close.
757 */
758 ret = nfsrpc_close(vp, 0, ap->a_td);
759 if (!error && ret)
760 error = ret;
761 if (error)
762 error = nfscl_maperr(ap->a_td, error, (uid_t)0,
763 (gid_t)0);
764 }
765 if (newnfs_directio_enable)
766 KASSERT((np->n_directio_asyncwr == 0),
767 ("nfs_close: dirty unflushed (%d) directio buffers\n",
768 np->n_directio_asyncwr));
769 if (newnfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) {
770 mtx_lock(&np->n_mtx);
771 KASSERT((np->n_directio_opens > 0),
772 ("nfs_close: unexpectedly value (0) of n_directio_opens\n"));
773 np->n_directio_opens--;
774 if (np->n_directio_opens == 0)
775 np->n_flag &= ~NNONCACHE;
776 mtx_unlock(&np->n_mtx);
777 }
778 if (localcred)
779 NFSFREECRED(cred);
780 return (error);
781}
782
783/*
784 * nfs getattr call from vfs.
785 */
786static int
787nfs_getattr(struct vop_getattr_args *ap)
788{
789 struct vnode *vp = ap->a_vp;
790 struct thread *td = curthread; /* XXX */
791 struct nfsnode *np = VTONFS(vp);
792 int error = 0;
793 struct nfsvattr nfsva;
794 struct vattr *vap = ap->a_vap;
795 struct vattr vattr;
796
797 /*
798 * Update local times for special files.
799 */
800 mtx_lock(&np->n_mtx);
801 if (np->n_flag & (NACC | NUPD))
802 np->n_flag |= NCHG;
803 mtx_unlock(&np->n_mtx);
804 /*
805 * First look in the cache.
806 */
807 if (ncl_getattrcache(vp, &vattr) == 0) {
808 vap->va_type = vattr.va_type;
809 vap->va_mode = vattr.va_mode;
810 vap->va_nlink = vattr.va_nlink;
811 vap->va_uid = vattr.va_uid;
812 vap->va_gid = vattr.va_gid;
813 vap->va_fsid = vattr.va_fsid;
814 vap->va_fileid = vattr.va_fileid;
815 vap->va_size = vattr.va_size;
816 vap->va_blocksize = vattr.va_blocksize;
817 vap->va_atime = vattr.va_atime;
818 vap->va_mtime = vattr.va_mtime;
819 vap->va_ctime = vattr.va_ctime;
820 vap->va_gen = vattr.va_gen;
821 vap->va_flags = vattr.va_flags;
822 vap->va_rdev = vattr.va_rdev;
823 vap->va_bytes = vattr.va_bytes;
824 vap->va_filerev = vattr.va_filerev;
825 /*
826 * Get the local modify time for the case of a write
827 * delegation.
828 */
829 nfscl_deleggetmodtime(vp, &vap->va_mtime);
830 return (0);
831 }
832
833 if (NFS_ISV34(vp) && nfs_prime_access_cache &&
834 nfsaccess_cache_timeout > 0) {
835 NFSINCRGLOBAL(newnfsstats.accesscache_misses);
836 nfs34_access_otw(vp, NFSACCESS_ALL, td, ap->a_cred, NULL);
837 if (ncl_getattrcache(vp, ap->a_vap) == 0) {
838 nfscl_deleggetmodtime(vp, &ap->a_vap->va_mtime);
839 return (0);
840 }
841 }
842 error = nfsrpc_getattr(vp, ap->a_cred, td, &nfsva, NULL);
843 if (!error)
844 error = nfscl_loadattrcache(&vp, &nfsva, vap, NULL, 0, 0);
845 if (!error) {
846 /*
847 * Get the local modify time for the case of a write
848 * delegation.
849 */
850 nfscl_deleggetmodtime(vp, &vap->va_mtime);
851 } else if (NFS_ISV4(vp)) {
852 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
853 }
854 return (error);
855}
856
857/*
858 * nfs setattr call.
859 */
860static int
861nfs_setattr(struct vop_setattr_args *ap)
862{
863 struct vnode *vp = ap->a_vp;
864 struct nfsnode *np = VTONFS(vp);
865 struct thread *td = curthread; /* XXX */
866 struct vattr *vap = ap->a_vap;
867 int error = 0;
868 u_quad_t tsize;
869
870#ifndef nolint
871 tsize = (u_quad_t)0;
872#endif
873
874 /*
875 * Setting of flags and marking of atimes are not supported.
876 */
877 if (vap->va_flags != VNOVAL)
878 return (EOPNOTSUPP);
879
880 /*
881 * Disallow write attempts if the filesystem is mounted read-only.
882 */
883 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
884 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
885 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
886 (vp->v_mount->mnt_flag & MNT_RDONLY))
887 return (EROFS);
888 if (vap->va_size != VNOVAL) {
889 switch (vp->v_type) {
890 case VDIR:
891 return (EISDIR);
892 case VCHR:
893 case VBLK:
894 case VSOCK:
895 case VFIFO:
896 if (vap->va_mtime.tv_sec == VNOVAL &&
897 vap->va_atime.tv_sec == VNOVAL &&
898 vap->va_mode == (mode_t)VNOVAL &&
899 vap->va_uid == (uid_t)VNOVAL &&
900 vap->va_gid == (gid_t)VNOVAL)
901 return (0);
902 vap->va_size = VNOVAL;
903 break;
904 default:
905 /*
906 * Disallow write attempts if the filesystem is
907 * mounted read-only.
908 */
909 if (vp->v_mount->mnt_flag & MNT_RDONLY)
910 return (EROFS);
911 /*
912 * We run vnode_pager_setsize() early (why?),
913 * we must set np->n_size now to avoid vinvalbuf
914 * V_SAVE races that might setsize a lower
915 * value.
916 */
917 mtx_lock(&np->n_mtx);
918 tsize = np->n_size;
919 mtx_unlock(&np->n_mtx);
920 error = ncl_meta_setsize(vp, ap->a_cred, td,
921 vap->va_size);
922 mtx_lock(&np->n_mtx);
923 if (np->n_flag & NMODIFIED) {
924 tsize = np->n_size;
925 mtx_unlock(&np->n_mtx);
926 if (vap->va_size == 0)
927 error = ncl_vinvalbuf(vp, 0, td, 1);
928 else
929 error = ncl_vinvalbuf(vp, V_SAVE, td, 1);
930 if (error) {
931 vnode_pager_setsize(vp, tsize);
932 return (error);
933 }
934 /*
935 * Call nfscl_delegmodtime() to set the modify time
936 * locally, as required.
937 */
938 nfscl_delegmodtime(vp);
939 } else
940 mtx_unlock(&np->n_mtx);
941 /*
942 * np->n_size has already been set to vap->va_size
943 * in ncl_meta_setsize(). We must set it again since
944 * nfs_loadattrcache() could be called through
945 * ncl_meta_setsize() and could modify np->n_size.
946 */
947 mtx_lock(&np->n_mtx);
948 np->n_vattr.na_size = np->n_size = vap->va_size;
949 mtx_unlock(&np->n_mtx);
950 };
951 } else {
952 mtx_lock(&np->n_mtx);
953 if ((vap->va_mtime.tv_sec != VNOVAL || vap->va_atime.tv_sec != VNOVAL) &&
954 (np->n_flag & NMODIFIED) && vp->v_type == VREG) {
955 mtx_unlock(&np->n_mtx);
956 if ((error = ncl_vinvalbuf(vp, V_SAVE, td, 1)) != 0 &&
957 (error == EINTR || error == EIO))
958 return (error);
959 } else
960 mtx_unlock(&np->n_mtx);
961 }
962 error = nfs_setattrrpc(vp, vap, ap->a_cred, td);
963 if (error && vap->va_size != VNOVAL) {
964 mtx_lock(&np->n_mtx);
965 np->n_size = np->n_vattr.na_size = tsize;
966 vnode_pager_setsize(vp, tsize);
967 mtx_unlock(&np->n_mtx);
968 }
969 return (error);
970}
971
972/*
973 * Do an nfs setattr rpc.
974 */
975static int
976nfs_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred,
977 struct thread *td)
978{
979 struct nfsnode *np = VTONFS(vp);
980 int error, ret, attrflag, i;
981 struct nfsvattr nfsva;
982
983 if (NFS_ISV34(vp)) {
984 mtx_lock(&np->n_mtx);
985 for (i = 0; i < NFS_ACCESSCACHESIZE; i++)
986 np->n_accesscache[i].stamp = 0;
987 np->n_flag |= NDELEGMOD;
988 mtx_unlock(&np->n_mtx);
989 KDTRACE_NFS_ACCESSCACHE_FLUSH_DONE(vp);
990 }
991 error = nfsrpc_setattr(vp, vap, NULL, cred, td, &nfsva, &attrflag,
992 NULL);
993 if (attrflag) {
994 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
995 if (ret && !error)
996 error = ret;
997 }
998 if (error && NFS_ISV4(vp))
999 error = nfscl_maperr(td, error, vap->va_uid, vap->va_gid);
1000 return (error);
1001}
1002
1003/*
1004 * nfs lookup call, one step at a time...
1005 * First look in cache
1006 * If not found, unlock the directory nfsnode and do the rpc
1007 */
1008static int
1009nfs_lookup(struct vop_lookup_args *ap)
1010{
1011 struct componentname *cnp = ap->a_cnp;
1012 struct vnode *dvp = ap->a_dvp;
1013 struct vnode **vpp = ap->a_vpp;
1014 struct mount *mp = dvp->v_mount;
1015 int flags = cnp->cn_flags;
1016 struct vnode *newvp;
1017 struct nfsmount *nmp;
1018 struct nfsnode *np, *newnp;
| 37
38/*
39 * vnode op calls for Sun NFS version 2, 3 and 4
40 */
41
42#include "opt_kdtrace.h"
43#include "opt_inet.h"
44
45#include <sys/param.h>
46#include <sys/kernel.h>
47#include <sys/systm.h>
48#include <sys/resourcevar.h>
49#include <sys/proc.h>
50#include <sys/mount.h>
51#include <sys/bio.h>
52#include <sys/buf.h>
53#include <sys/jail.h>
54#include <sys/malloc.h>
55#include <sys/mbuf.h>
56#include <sys/namei.h>
57#include <sys/socket.h>
58#include <sys/vnode.h>
59#include <sys/dirent.h>
60#include <sys/fcntl.h>
61#include <sys/lockf.h>
62#include <sys/stat.h>
63#include <sys/sysctl.h>
64#include <sys/signalvar.h>
65
66#include <vm/vm.h>
67#include <vm/vm_extern.h>
68#include <vm/vm_object.h>
69
70#include <fs/nfs/nfsport.h>
71#include <fs/nfsclient/nfsnode.h>
72#include <fs/nfsclient/nfsmount.h>
73#include <fs/nfsclient/nfs.h>
74#include <fs/nfsclient/nfs_kdtrace.h>
75
76#include <net/if.h>
77#include <netinet/in.h>
78#include <netinet/in_var.h>
79
80#include <nfs/nfs_lock.h>
81
82#ifdef KDTRACE_HOOKS
83#include <sys/dtrace_bsd.h>
84
85dtrace_nfsclient_accesscache_flush_probe_func_t
86 dtrace_nfscl_accesscache_flush_done_probe;
87uint32_t nfscl_accesscache_flush_done_id;
88
89dtrace_nfsclient_accesscache_get_probe_func_t
90 dtrace_nfscl_accesscache_get_hit_probe,
91 dtrace_nfscl_accesscache_get_miss_probe;
92uint32_t nfscl_accesscache_get_hit_id;
93uint32_t nfscl_accesscache_get_miss_id;
94
95dtrace_nfsclient_accesscache_load_probe_func_t
96 dtrace_nfscl_accesscache_load_done_probe;
97uint32_t nfscl_accesscache_load_done_id;
98#endif /* !KDTRACE_HOOKS */
99
100/* Defs */
101#define TRUE 1
102#define FALSE 0
103
104extern struct nfsstats newnfsstats;
105extern int nfsrv_useacl;
106MALLOC_DECLARE(M_NEWNFSREQ);
107
108/*
109 * Ifdef for FreeBSD-current merged buffer cache. It is unfortunate that these
110 * calls are not in getblk() and brelse() so that they would not be necessary
111 * here.
112 */
113#ifndef B_VMIO
114#define vfs_busy_pages(bp, f)
115#endif
116
117static vop_read_t nfsfifo_read;
118static vop_write_t nfsfifo_write;
119static vop_close_t nfsfifo_close;
120static int nfs_setattrrpc(struct vnode *, struct vattr *, struct ucred *,
121 struct thread *);
122static vop_lookup_t nfs_lookup;
123static vop_create_t nfs_create;
124static vop_mknod_t nfs_mknod;
125static vop_open_t nfs_open;
126static vop_pathconf_t nfs_pathconf;
127static vop_close_t nfs_close;
128static vop_access_t nfs_access;
129static vop_getattr_t nfs_getattr;
130static vop_setattr_t nfs_setattr;
131static vop_read_t nfs_read;
132static vop_fsync_t nfs_fsync;
133static vop_remove_t nfs_remove;
134static vop_link_t nfs_link;
135static vop_rename_t nfs_rename;
136static vop_mkdir_t nfs_mkdir;
137static vop_rmdir_t nfs_rmdir;
138static vop_symlink_t nfs_symlink;
139static vop_readdir_t nfs_readdir;
140static vop_strategy_t nfs_strategy;
141static vop_lock1_t nfs_lock1;
142static int nfs_lookitup(struct vnode *, char *, int,
143 struct ucred *, struct thread *, struct nfsnode **);
144static int nfs_sillyrename(struct vnode *, struct vnode *,
145 struct componentname *);
146static vop_access_t nfsspec_access;
147static vop_readlink_t nfs_readlink;
148static vop_print_t nfs_print;
149static vop_advlock_t nfs_advlock;
150static vop_advlockasync_t nfs_advlockasync;
151static vop_getacl_t nfs_getacl;
152static vop_setacl_t nfs_setacl;
153
154/*
155 * Global vfs data structures for nfs
156 */
157struct vop_vector newnfs_vnodeops = {
158 .vop_default = &default_vnodeops,
159 .vop_access = nfs_access,
160 .vop_advlock = nfs_advlock,
161 .vop_advlockasync = nfs_advlockasync,
162 .vop_close = nfs_close,
163 .vop_create = nfs_create,
164 .vop_fsync = nfs_fsync,
165 .vop_getattr = nfs_getattr,
166 .vop_getpages = ncl_getpages,
167 .vop_putpages = ncl_putpages,
168 .vop_inactive = ncl_inactive,
169 .vop_link = nfs_link,
170 .vop_lock1 = nfs_lock1,
171 .vop_lookup = nfs_lookup,
172 .vop_mkdir = nfs_mkdir,
173 .vop_mknod = nfs_mknod,
174 .vop_open = nfs_open,
175 .vop_pathconf = nfs_pathconf,
176 .vop_print = nfs_print,
177 .vop_read = nfs_read,
178 .vop_readdir = nfs_readdir,
179 .vop_readlink = nfs_readlink,
180 .vop_reclaim = ncl_reclaim,
181 .vop_remove = nfs_remove,
182 .vop_rename = nfs_rename,
183 .vop_rmdir = nfs_rmdir,
184 .vop_setattr = nfs_setattr,
185 .vop_strategy = nfs_strategy,
186 .vop_symlink = nfs_symlink,
187 .vop_write = ncl_write,
188 .vop_getacl = nfs_getacl,
189 .vop_setacl = nfs_setacl,
190};
191
192struct vop_vector newnfs_fifoops = {
193 .vop_default = &fifo_specops,
194 .vop_access = nfsspec_access,
195 .vop_close = nfsfifo_close,
196 .vop_fsync = nfs_fsync,
197 .vop_getattr = nfs_getattr,
198 .vop_inactive = ncl_inactive,
199 .vop_print = nfs_print,
200 .vop_read = nfsfifo_read,
201 .vop_reclaim = ncl_reclaim,
202 .vop_setattr = nfs_setattr,
203 .vop_write = nfsfifo_write,
204};
205
206static int nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp,
207 struct componentname *cnp, struct vattr *vap);
208static int nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
209 int namelen, struct ucred *cred, struct thread *td);
210static int nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp,
211 char *fnameptr, int fnamelen, struct vnode *tdvp, struct vnode *tvp,
212 char *tnameptr, int tnamelen, struct ucred *cred, struct thread *td);
213static int nfs_renameit(struct vnode *sdvp, struct vnode *svp,
214 struct componentname *scnp, struct sillyrename *sp);
215
216/*
217 * Global variables
218 */
219#define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1))
220
221SYSCTL_DECL(_vfs_nfs);
222
223static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO;
224SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
225 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
226
227static int nfs_prime_access_cache = 0;
228SYSCTL_INT(_vfs_nfs, OID_AUTO, prime_access_cache, CTLFLAG_RW,
229 &nfs_prime_access_cache, 0,
230 "Prime NFS ACCESS cache when fetching attributes");
231
232static int newnfs_commit_on_close = 0;
233SYSCTL_INT(_vfs_nfs, OID_AUTO, commit_on_close, CTLFLAG_RW,
234 &newnfs_commit_on_close, 0, "write+commit on close, else only write");
235
236static int nfs_clean_pages_on_close = 1;
237SYSCTL_INT(_vfs_nfs, OID_AUTO, clean_pages_on_close, CTLFLAG_RW,
238 &nfs_clean_pages_on_close, 0, "NFS clean dirty pages on close");
239
240int newnfs_directio_enable = 0;
241SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_directio_enable, CTLFLAG_RW,
242 &newnfs_directio_enable, 0, "Enable NFS directio");
243
244/*
245 * This sysctl allows other processes to mmap a file that has been opened
246 * O_DIRECT by a process. In general, having processes mmap the file while
247 * Direct IO is in progress can lead to Data Inconsistencies. But, we allow
248 * this by default to prevent DoS attacks - to prevent a malicious user from
249 * opening up files O_DIRECT preventing other users from mmap'ing these
250 * files. "Protected" environments where stricter consistency guarantees are
251 * required can disable this knob. The process that opened the file O_DIRECT
252 * cannot mmap() the file, because mmap'ed IO on an O_DIRECT open() is not
253 * meaningful.
254 */
255int newnfs_directio_allow_mmap = 1;
256SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_directio_allow_mmap, CTLFLAG_RW,
257 &newnfs_directio_allow_mmap, 0, "Enable mmaped IO on file with O_DIRECT opens");
258
259#if 0
260SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
261 &newnfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
262
263SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
264 &newnfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
265#endif
266
267#define NFSACCESS_ALL (NFSACCESS_READ | NFSACCESS_MODIFY \
268 | NFSACCESS_EXTEND | NFSACCESS_EXECUTE \
269 | NFSACCESS_DELETE | NFSACCESS_LOOKUP)
270
271/*
272 * SMP Locking Note :
273 * The list of locks after the description of the lock is the ordering
274 * of other locks acquired with the lock held.
275 * np->n_mtx : Protects the fields in the nfsnode.
276 VM Object Lock
277 VI_MTX (acquired indirectly)
278 * nmp->nm_mtx : Protects the fields in the nfsmount.
279 rep->r_mtx
280 * ncl_iod_mutex : Global lock, protects shared nfsiod state.
281 * nfs_reqq_mtx : Global lock, protects the nfs_reqq list.
282 nmp->nm_mtx
283 rep->r_mtx
284 * rep->r_mtx : Protects the fields in an nfsreq.
285 */
286
287static int
288nfs34_access_otw(struct vnode *vp, int wmode, struct thread *td,
289 struct ucred *cred, u_int32_t *retmode)
290{
291 int error = 0, attrflag, i, lrupos;
292 u_int32_t rmode;
293 struct nfsnode *np = VTONFS(vp);
294 struct nfsvattr nfsva;
295
296 error = nfsrpc_accessrpc(vp, wmode, cred, td, &nfsva, &attrflag,
297 &rmode, NULL);
298 if (attrflag)
299 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
300 if (!error) {
301 lrupos = 0;
302 mtx_lock(&np->n_mtx);
303 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) {
304 if (np->n_accesscache[i].uid == cred->cr_uid) {
305 np->n_accesscache[i].mode = rmode;
306 np->n_accesscache[i].stamp = time_second;
307 break;
308 }
309 if (i > 0 && np->n_accesscache[i].stamp <
310 np->n_accesscache[lrupos].stamp)
311 lrupos = i;
312 }
313 if (i == NFS_ACCESSCACHESIZE) {
314 np->n_accesscache[lrupos].uid = cred->cr_uid;
315 np->n_accesscache[lrupos].mode = rmode;
316 np->n_accesscache[lrupos].stamp = time_second;
317 }
318 mtx_unlock(&np->n_mtx);
319 if (retmode != NULL)
320 *retmode = rmode;
321 KDTRACE_NFS_ACCESSCACHE_LOAD_DONE(vp, cred->cr_uid, rmode, 0);
322 } else if (NFS_ISV4(vp)) {
323 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
324 }
325#ifdef KDTRACE_HOOKS
326 if (error != 0)
327 KDTRACE_NFS_ACCESSCACHE_LOAD_DONE(vp, cred->cr_uid, 0,
328 error);
329#endif
330 return (error);
331}
332
333/*
334 * nfs access vnode op.
335 * For nfs version 2, just return ok. File accesses may fail later.
336 * For nfs version 3, use the access rpc to check accessibility. If file modes
337 * are changed on the server, accesses might still fail later.
338 */
339static int
340nfs_access(struct vop_access_args *ap)
341{
342 struct vnode *vp = ap->a_vp;
343 int error = 0, i, gotahit;
344 u_int32_t mode, wmode, rmode;
345 int v34 = NFS_ISV34(vp);
346 struct nfsnode *np = VTONFS(vp);
347
348 /*
349 * Disallow write attempts on filesystems mounted read-only;
350 * unless the file is a socket, fifo, or a block or character
351 * device resident on the filesystem.
352 */
353 if ((ap->a_accmode & (VWRITE | VAPPEND | VWRITE_NAMED_ATTRS |
354 VDELETE_CHILD | VWRITE_ATTRIBUTES | VDELETE | VWRITE_ACL |
355 VWRITE_OWNER)) != 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) != 0) {
356 switch (vp->v_type) {
357 case VREG:
358 case VDIR:
359 case VLNK:
360 return (EROFS);
361 default:
362 break;
363 }
364 }
365 /*
366 * For nfs v3 or v4, check to see if we have done this recently, and if
367 * so return our cached result instead of making an ACCESS call.
368 * If not, do an access rpc, otherwise you are stuck emulating
369 * ufs_access() locally using the vattr. This may not be correct,
370 * since the server may apply other access criteria such as
371 * client uid-->server uid mapping that we do not know about.
372 */
373 if (v34) {
374 if (ap->a_accmode & VREAD)
375 mode = NFSACCESS_READ;
376 else
377 mode = 0;
378 if (vp->v_type != VDIR) {
379 if (ap->a_accmode & VWRITE)
380 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
381 if (ap->a_accmode & VAPPEND)
382 mode |= NFSACCESS_EXTEND;
383 if (ap->a_accmode & VEXEC)
384 mode |= NFSACCESS_EXECUTE;
385 if (ap->a_accmode & VDELETE)
386 mode |= NFSACCESS_DELETE;
387 } else {
388 if (ap->a_accmode & VWRITE)
389 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
390 if (ap->a_accmode & VAPPEND)
391 mode |= NFSACCESS_EXTEND;
392 if (ap->a_accmode & VEXEC)
393 mode |= NFSACCESS_LOOKUP;
394 if (ap->a_accmode & VDELETE)
395 mode |= NFSACCESS_DELETE;
396 if (ap->a_accmode & VDELETE_CHILD)
397 mode |= NFSACCESS_MODIFY;
398 }
399 /* XXX safety belt, only make blanket request if caching */
400 if (nfsaccess_cache_timeout > 0) {
401 wmode = NFSACCESS_READ | NFSACCESS_MODIFY |
402 NFSACCESS_EXTEND | NFSACCESS_EXECUTE |
403 NFSACCESS_DELETE | NFSACCESS_LOOKUP;
404 } else {
405 wmode = mode;
406 }
407
408 /*
409 * Does our cached result allow us to give a definite yes to
410 * this request?
411 */
412 gotahit = 0;
413 mtx_lock(&np->n_mtx);
414 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) {
415 if (ap->a_cred->cr_uid == np->n_accesscache[i].uid) {
416 if (time_second < (np->n_accesscache[i].stamp
417 + nfsaccess_cache_timeout) &&
418 (np->n_accesscache[i].mode & mode) == mode) {
419 NFSINCRGLOBAL(newnfsstats.accesscache_hits);
420 gotahit = 1;
421 }
422 break;
423 }
424 }
425 mtx_unlock(&np->n_mtx);
426#ifdef KDTRACE_HOOKS
427 if (gotahit != 0)
428 KDTRACE_NFS_ACCESSCACHE_GET_HIT(vp,
429 ap->a_cred->cr_uid, mode);
430 else
431 KDTRACE_NFS_ACCESSCACHE_GET_MISS(vp,
432 ap->a_cred->cr_uid, mode);
433#endif
434 if (gotahit == 0) {
435 /*
436 * Either a no, or a don't know. Go to the wire.
437 */
438 NFSINCRGLOBAL(newnfsstats.accesscache_misses);
439 error = nfs34_access_otw(vp, wmode, ap->a_td,
440 ap->a_cred, &rmode);
441 if (!error &&
442 (rmode & mode) != mode)
443 error = EACCES;
444 }
445 return (error);
446 } else {
447 if ((error = nfsspec_access(ap)) != 0) {
448 return (error);
449 }
450 /*
451 * Attempt to prevent a mapped root from accessing a file
452 * which it shouldn't. We try to read a byte from the file
453 * if the user is root and the file is not zero length.
454 * After calling nfsspec_access, we should have the correct
455 * file size cached.
456 */
457 mtx_lock(&np->n_mtx);
458 if (ap->a_cred->cr_uid == 0 && (ap->a_accmode & VREAD)
459 && VTONFS(vp)->n_size > 0) {
460 struct iovec aiov;
461 struct uio auio;
462 char buf[1];
463
464 mtx_unlock(&np->n_mtx);
465 aiov.iov_base = buf;
466 aiov.iov_len = 1;
467 auio.uio_iov = &aiov;
468 auio.uio_iovcnt = 1;
469 auio.uio_offset = 0;
470 auio.uio_resid = 1;
471 auio.uio_segflg = UIO_SYSSPACE;
472 auio.uio_rw = UIO_READ;
473 auio.uio_td = ap->a_td;
474
475 if (vp->v_type == VREG)
476 error = ncl_readrpc(vp, &auio, ap->a_cred);
477 else if (vp->v_type == VDIR) {
478 char* bp;
479 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
480 aiov.iov_base = bp;
481 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
482 error = ncl_readdirrpc(vp, &auio, ap->a_cred,
483 ap->a_td);
484 free(bp, M_TEMP);
485 } else if (vp->v_type == VLNK)
486 error = ncl_readlinkrpc(vp, &auio, ap->a_cred);
487 else
488 error = EACCES;
489 } else
490 mtx_unlock(&np->n_mtx);
491 return (error);
492 }
493}
494
495
496/*
497 * nfs open vnode op
498 * Check to see if the type is ok
499 * and that deletion is not in progress.
500 * For paged in text files, you will need to flush the page cache
501 * if consistency is lost.
502 */
503/* ARGSUSED */
504static int
505nfs_open(struct vop_open_args *ap)
506{
507 struct vnode *vp = ap->a_vp;
508 struct nfsnode *np = VTONFS(vp);
509 struct vattr vattr;
510 int error;
511 int fmode = ap->a_mode;
512
513 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK)
514 return (EOPNOTSUPP);
515
516 /*
517 * For NFSv4, we need to do the Open Op before cache validation,
518 * so that we conform to RFC3530 Sec. 9.3.1.
519 */
520 if (NFS_ISV4(vp)) {
521 error = nfsrpc_open(vp, fmode, ap->a_cred, ap->a_td);
522 if (error) {
523 error = nfscl_maperr(ap->a_td, error, (uid_t)0,
524 (gid_t)0);
525 return (error);
526 }
527 }
528
529 /*
530 * Now, if this Open will be doing reading, re-validate/flush the
531 * cache, so that Close/Open coherency is maintained.
532 */
533 mtx_lock(&np->n_mtx);
534 if (np->n_flag & NMODIFIED) {
535 mtx_unlock(&np->n_mtx);
536 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
537 if (error == EINTR || error == EIO) {
538 if (NFS_ISV4(vp))
539 (void) nfsrpc_close(vp, 0, ap->a_td);
540 return (error);
541 }
542 mtx_lock(&np->n_mtx);
543 np->n_attrstamp = 0;
544 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
545 if (vp->v_type == VDIR)
546 np->n_direofoffset = 0;
547 mtx_unlock(&np->n_mtx);
548 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
549 if (error) {
550 if (NFS_ISV4(vp))
551 (void) nfsrpc_close(vp, 0, ap->a_td);
552 return (error);
553 }
554 mtx_lock(&np->n_mtx);
555 np->n_mtime = vattr.va_mtime;
556 if (NFS_ISV4(vp))
557 np->n_change = vattr.va_filerev;
558 } else {
559 mtx_unlock(&np->n_mtx);
560 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
561 if (error) {
562 if (NFS_ISV4(vp))
563 (void) nfsrpc_close(vp, 0, ap->a_td);
564 return (error);
565 }
566 mtx_lock(&np->n_mtx);
567 if ((NFS_ISV4(vp) && np->n_change != vattr.va_filerev) ||
568 NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
569 if (vp->v_type == VDIR)
570 np->n_direofoffset = 0;
571 mtx_unlock(&np->n_mtx);
572 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
573 if (error == EINTR || error == EIO) {
574 if (NFS_ISV4(vp))
575 (void) nfsrpc_close(vp, 0, ap->a_td);
576 return (error);
577 }
578 mtx_lock(&np->n_mtx);
579 np->n_mtime = vattr.va_mtime;
580 if (NFS_ISV4(vp))
581 np->n_change = vattr.va_filerev;
582 }
583 }
584
585 /*
586 * If the object has >= 1 O_DIRECT active opens, we disable caching.
587 */
588 if (newnfs_directio_enable && (fmode & O_DIRECT) &&
589 (vp->v_type == VREG)) {
590 if (np->n_directio_opens == 0) {
591 mtx_unlock(&np->n_mtx);
592 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
593 if (error) {
594 if (NFS_ISV4(vp))
595 (void) nfsrpc_close(vp, 0, ap->a_td);
596 return (error);
597 }
598 mtx_lock(&np->n_mtx);
599 np->n_flag |= NNONCACHE;
600 }
601 np->n_directio_opens++;
602 }
603 mtx_unlock(&np->n_mtx);
604 vnode_create_vobject(vp, vattr.va_size, ap->a_td);
605 return (0);
606}
607
608/*
609 * nfs close vnode op
610 * What an NFS client should do upon close after writing is a debatable issue.
611 * Most NFS clients push delayed writes to the server upon close, basically for
612 * two reasons:
613 * 1 - So that any write errors may be reported back to the client process
614 * doing the close system call. By far the two most likely errors are
615 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
616 * 2 - To put a worst case upper bound on cache inconsistency between
617 * multiple clients for the file.
618 * There is also a consistency problem for Version 2 of the protocol w.r.t.
619 * not being able to tell if other clients are writing a file concurrently,
620 * since there is no way of knowing if the changed modify time in the reply
621 * is only due to the write for this client.
622 * (NFS Version 3 provides weak cache consistency data in the reply that
623 * should be sufficient to detect and handle this case.)
624 *
625 * The current code does the following:
626 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
627 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
628 * or commit them (this satisfies 1 and 2 except for the
629 * case where the server crashes after this close but
630 * before the commit RPC, which is felt to be "good
631 * enough". Changing the last argument to ncl_flush() to
632 * a 1 would force a commit operation, if it is felt a
633 * commit is necessary now.
634 * for NFS Version 4 - flush the dirty buffers and commit them, if
635 * nfscl_mustflush() says this is necessary.
636 * It is necessary if there is no write delegation held,
637 * in order to satisfy open/close coherency.
638 * If the file isn't cached on local stable storage,
639 * it may be necessary in order to detect "out of space"
640 * errors from the server, if the write delegation
641 * issued by the server doesn't allow the file to grow.
642 */
643/* ARGSUSED */
644static int
645nfs_close(struct vop_close_args *ap)
646{
647 struct vnode *vp = ap->a_vp;
648 struct nfsnode *np = VTONFS(vp);
649 struct nfsvattr nfsva;
650 struct ucred *cred;
651 int error = 0, ret, localcred = 0;
652 int fmode = ap->a_fflag;
653
654 if ((vp->v_mount->mnt_kern_flag & MNTK_UNMOUNTF))
655 return (0);
656 /*
657 * During shutdown, a_cred isn't valid, so just use root.
658 */
659 if (ap->a_cred == NOCRED) {
660 cred = newnfs_getcred();
661 localcred = 1;
662 } else {
663 cred = ap->a_cred;
664 }
665 if (vp->v_type == VREG) {
666 /*
667 * Examine and clean dirty pages, regardless of NMODIFIED.
668 * This closes a major hole in close-to-open consistency.
669 * We want to push out all dirty pages (and buffers) on
670 * close, regardless of whether they were dirtied by
671 * mmap'ed writes or via write().
672 */
673 if (nfs_clean_pages_on_close && vp->v_object) {
674 VM_OBJECT_LOCK(vp->v_object);
675 vm_object_page_clean(vp->v_object, 0, 0, 0);
676 VM_OBJECT_UNLOCK(vp->v_object);
677 }
678 mtx_lock(&np->n_mtx);
679 if (np->n_flag & NMODIFIED) {
680 mtx_unlock(&np->n_mtx);
681 if (NFS_ISV3(vp)) {
682 /*
683 * Under NFSv3 we have dirty buffers to dispose of. We
684 * must flush them to the NFS server. We have the option
685 * of waiting all the way through the commit rpc or just
686 * waiting for the initial write. The default is to only
687 * wait through the initial write so the data is in the
688 * server's cache, which is roughly similar to the state
689 * a standard disk subsystem leaves the file in on close().
690 *
691 * We cannot clear the NMODIFIED bit in np->n_flag due to
692 * potential races with other processes, and certainly
693 * cannot clear it if we don't commit.
694 * These races occur when there is no longer the old
695 * traditional vnode locking implemented for Vnode Ops.
696 */
697 int cm = newnfs_commit_on_close ? 1 : 0;
698 error = ncl_flush(vp, MNT_WAIT, cred, ap->a_td, cm, 0);
699 /* np->n_flag &= ~NMODIFIED; */
700 } else if (NFS_ISV4(vp)) {
701 if (nfscl_mustflush(vp) != 0) {
702 int cm = newnfs_commit_on_close ? 1 : 0;
703 error = ncl_flush(vp, MNT_WAIT, cred, ap->a_td,
704 cm, 0);
705 /*
706 * as above w.r.t races when clearing
707 * NMODIFIED.
708 * np->n_flag &= ~NMODIFIED;
709 */
710 }
711 } else
712 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
713 mtx_lock(&np->n_mtx);
714 }
715 /*
716 * Invalidate the attribute cache in all cases.
717 * An open is going to fetch fresh attrs any way, other procs
718 * on this node that have file open will be forced to do an
719 * otw attr fetch, but this is safe.
720 * --> A user found that their RPC count dropped by 20% when
721 * this was commented out and I can't see any requirement
722 * for it, so I've disabled it when negative lookups are
723 * enabled. (What does this have to do with negative lookup
724 * caching? Well nothing, except it was reported by the
725 * same user that needed negative lookup caching and I wanted
726 * there to be a way to disable it to see if it
727 * is the cause of some caching/coherency issue that might
728 * crop up.)
729 */
730 if (VFSTONFS(vp->v_mount)->nm_negnametimeo == 0) {
731 np->n_attrstamp = 0;
732 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
733 }
734 if (np->n_flag & NWRITEERR) {
735 np->n_flag &= ~NWRITEERR;
736 error = np->n_error;
737 }
738 mtx_unlock(&np->n_mtx);
739 }
740
741 if (NFS_ISV4(vp)) {
742 /*
743 * Get attributes so "change" is up to date.
744 */
745 if (error == 0 && nfscl_mustflush(vp) != 0) {
746 ret = nfsrpc_getattr(vp, cred, ap->a_td, &nfsva,
747 NULL);
748 if (!ret) {
749 np->n_change = nfsva.na_filerev;
750 (void) nfscl_loadattrcache(&vp, &nfsva, NULL,
751 NULL, 0, 0);
752 }
753 }
754
755 /*
756 * and do the close.
757 */
758 ret = nfsrpc_close(vp, 0, ap->a_td);
759 if (!error && ret)
760 error = ret;
761 if (error)
762 error = nfscl_maperr(ap->a_td, error, (uid_t)0,
763 (gid_t)0);
764 }
765 if (newnfs_directio_enable)
766 KASSERT((np->n_directio_asyncwr == 0),
767 ("nfs_close: dirty unflushed (%d) directio buffers\n",
768 np->n_directio_asyncwr));
769 if (newnfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) {
770 mtx_lock(&np->n_mtx);
771 KASSERT((np->n_directio_opens > 0),
772 ("nfs_close: unexpectedly value (0) of n_directio_opens\n"));
773 np->n_directio_opens--;
774 if (np->n_directio_opens == 0)
775 np->n_flag &= ~NNONCACHE;
776 mtx_unlock(&np->n_mtx);
777 }
778 if (localcred)
779 NFSFREECRED(cred);
780 return (error);
781}
782
783/*
784 * nfs getattr call from vfs.
785 */
786static int
787nfs_getattr(struct vop_getattr_args *ap)
788{
789 struct vnode *vp = ap->a_vp;
790 struct thread *td = curthread; /* XXX */
791 struct nfsnode *np = VTONFS(vp);
792 int error = 0;
793 struct nfsvattr nfsva;
794 struct vattr *vap = ap->a_vap;
795 struct vattr vattr;
796
797 /*
798 * Update local times for special files.
799 */
800 mtx_lock(&np->n_mtx);
801 if (np->n_flag & (NACC | NUPD))
802 np->n_flag |= NCHG;
803 mtx_unlock(&np->n_mtx);
804 /*
805 * First look in the cache.
806 */
807 if (ncl_getattrcache(vp, &vattr) == 0) {
808 vap->va_type = vattr.va_type;
809 vap->va_mode = vattr.va_mode;
810 vap->va_nlink = vattr.va_nlink;
811 vap->va_uid = vattr.va_uid;
812 vap->va_gid = vattr.va_gid;
813 vap->va_fsid = vattr.va_fsid;
814 vap->va_fileid = vattr.va_fileid;
815 vap->va_size = vattr.va_size;
816 vap->va_blocksize = vattr.va_blocksize;
817 vap->va_atime = vattr.va_atime;
818 vap->va_mtime = vattr.va_mtime;
819 vap->va_ctime = vattr.va_ctime;
820 vap->va_gen = vattr.va_gen;
821 vap->va_flags = vattr.va_flags;
822 vap->va_rdev = vattr.va_rdev;
823 vap->va_bytes = vattr.va_bytes;
824 vap->va_filerev = vattr.va_filerev;
825 /*
826 * Get the local modify time for the case of a write
827 * delegation.
828 */
829 nfscl_deleggetmodtime(vp, &vap->va_mtime);
830 return (0);
831 }
832
833 if (NFS_ISV34(vp) && nfs_prime_access_cache &&
834 nfsaccess_cache_timeout > 0) {
835 NFSINCRGLOBAL(newnfsstats.accesscache_misses);
836 nfs34_access_otw(vp, NFSACCESS_ALL, td, ap->a_cred, NULL);
837 if (ncl_getattrcache(vp, ap->a_vap) == 0) {
838 nfscl_deleggetmodtime(vp, &ap->a_vap->va_mtime);
839 return (0);
840 }
841 }
842 error = nfsrpc_getattr(vp, ap->a_cred, td, &nfsva, NULL);
843 if (!error)
844 error = nfscl_loadattrcache(&vp, &nfsva, vap, NULL, 0, 0);
845 if (!error) {
846 /*
847 * Get the local modify time for the case of a write
848 * delegation.
849 */
850 nfscl_deleggetmodtime(vp, &vap->va_mtime);
851 } else if (NFS_ISV4(vp)) {
852 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
853 }
854 return (error);
855}
856
857/*
858 * nfs setattr call.
859 */
860static int
861nfs_setattr(struct vop_setattr_args *ap)
862{
863 struct vnode *vp = ap->a_vp;
864 struct nfsnode *np = VTONFS(vp);
865 struct thread *td = curthread; /* XXX */
866 struct vattr *vap = ap->a_vap;
867 int error = 0;
868 u_quad_t tsize;
869
870#ifndef nolint
871 tsize = (u_quad_t)0;
872#endif
873
874 /*
875 * Setting of flags and marking of atimes are not supported.
876 */
877 if (vap->va_flags != VNOVAL)
878 return (EOPNOTSUPP);
879
880 /*
881 * Disallow write attempts if the filesystem is mounted read-only.
882 */
883 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
884 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
885 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
886 (vp->v_mount->mnt_flag & MNT_RDONLY))
887 return (EROFS);
888 if (vap->va_size != VNOVAL) {
889 switch (vp->v_type) {
890 case VDIR:
891 return (EISDIR);
892 case VCHR:
893 case VBLK:
894 case VSOCK:
895 case VFIFO:
896 if (vap->va_mtime.tv_sec == VNOVAL &&
897 vap->va_atime.tv_sec == VNOVAL &&
898 vap->va_mode == (mode_t)VNOVAL &&
899 vap->va_uid == (uid_t)VNOVAL &&
900 vap->va_gid == (gid_t)VNOVAL)
901 return (0);
902 vap->va_size = VNOVAL;
903 break;
904 default:
905 /*
906 * Disallow write attempts if the filesystem is
907 * mounted read-only.
908 */
909 if (vp->v_mount->mnt_flag & MNT_RDONLY)
910 return (EROFS);
911 /*
912 * We run vnode_pager_setsize() early (why?),
913 * we must set np->n_size now to avoid vinvalbuf
914 * V_SAVE races that might setsize a lower
915 * value.
916 */
917 mtx_lock(&np->n_mtx);
918 tsize = np->n_size;
919 mtx_unlock(&np->n_mtx);
920 error = ncl_meta_setsize(vp, ap->a_cred, td,
921 vap->va_size);
922 mtx_lock(&np->n_mtx);
923 if (np->n_flag & NMODIFIED) {
924 tsize = np->n_size;
925 mtx_unlock(&np->n_mtx);
926 if (vap->va_size == 0)
927 error = ncl_vinvalbuf(vp, 0, td, 1);
928 else
929 error = ncl_vinvalbuf(vp, V_SAVE, td, 1);
930 if (error) {
931 vnode_pager_setsize(vp, tsize);
932 return (error);
933 }
934 /*
935 * Call nfscl_delegmodtime() to set the modify time
936 * locally, as required.
937 */
938 nfscl_delegmodtime(vp);
939 } else
940 mtx_unlock(&np->n_mtx);
941 /*
942 * np->n_size has already been set to vap->va_size
943 * in ncl_meta_setsize(). We must set it again since
944 * nfs_loadattrcache() could be called through
945 * ncl_meta_setsize() and could modify np->n_size.
946 */
947 mtx_lock(&np->n_mtx);
948 np->n_vattr.na_size = np->n_size = vap->va_size;
949 mtx_unlock(&np->n_mtx);
950 };
951 } else {
952 mtx_lock(&np->n_mtx);
953 if ((vap->va_mtime.tv_sec != VNOVAL || vap->va_atime.tv_sec != VNOVAL) &&
954 (np->n_flag & NMODIFIED) && vp->v_type == VREG) {
955 mtx_unlock(&np->n_mtx);
956 if ((error = ncl_vinvalbuf(vp, V_SAVE, td, 1)) != 0 &&
957 (error == EINTR || error == EIO))
958 return (error);
959 } else
960 mtx_unlock(&np->n_mtx);
961 }
962 error = nfs_setattrrpc(vp, vap, ap->a_cred, td);
963 if (error && vap->va_size != VNOVAL) {
964 mtx_lock(&np->n_mtx);
965 np->n_size = np->n_vattr.na_size = tsize;
966 vnode_pager_setsize(vp, tsize);
967 mtx_unlock(&np->n_mtx);
968 }
969 return (error);
970}
971
972/*
973 * Do an nfs setattr rpc.
974 */
975static int
976nfs_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred,
977 struct thread *td)
978{
979 struct nfsnode *np = VTONFS(vp);
980 int error, ret, attrflag, i;
981 struct nfsvattr nfsva;
982
983 if (NFS_ISV34(vp)) {
984 mtx_lock(&np->n_mtx);
985 for (i = 0; i < NFS_ACCESSCACHESIZE; i++)
986 np->n_accesscache[i].stamp = 0;
987 np->n_flag |= NDELEGMOD;
988 mtx_unlock(&np->n_mtx);
989 KDTRACE_NFS_ACCESSCACHE_FLUSH_DONE(vp);
990 }
991 error = nfsrpc_setattr(vp, vap, NULL, cred, td, &nfsva, &attrflag,
992 NULL);
993 if (attrflag) {
994 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
995 if (ret && !error)
996 error = ret;
997 }
998 if (error && NFS_ISV4(vp))
999 error = nfscl_maperr(td, error, vap->va_uid, vap->va_gid);
1000 return (error);
1001}
1002
1003/*
1004 * nfs lookup call, one step at a time...
1005 * First look in cache
1006 * If not found, unlock the directory nfsnode and do the rpc
1007 */
1008static int
1009nfs_lookup(struct vop_lookup_args *ap)
1010{
1011 struct componentname *cnp = ap->a_cnp;
1012 struct vnode *dvp = ap->a_dvp;
1013 struct vnode **vpp = ap->a_vpp;
1014 struct mount *mp = dvp->v_mount;
1015 int flags = cnp->cn_flags;
1016 struct vnode *newvp;
1017 struct nfsmount *nmp;
1018 struct nfsnode *np, *newnp;
|
1285 }
1286 *vpp = newvp;
1287 return (0);
1288}
1289
1290/*
1291 * nfs read call.
1292 * Just call ncl_bioread() to do the work.
1293 */
1294static int
1295nfs_read(struct vop_read_args *ap)
1296{
1297 struct vnode *vp = ap->a_vp;
1298
1299 switch (vp->v_type) {
1300 case VREG:
1301 return (ncl_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred));
1302 case VDIR:
1303 return (EISDIR);
1304 default:
1305 return (EOPNOTSUPP);
1306 }
1307}
1308
1309/*
1310 * nfs readlink call
1311 */
1312static int
1313nfs_readlink(struct vop_readlink_args *ap)
1314{
1315 struct vnode *vp = ap->a_vp;
1316
1317 if (vp->v_type != VLNK)
1318 return (EINVAL);
1319 return (ncl_bioread(vp, ap->a_uio, 0, ap->a_cred));
1320}
1321
1322/*
1323 * Do a readlink rpc.
1324 * Called by ncl_doio() from below the buffer cache.
1325 */
1326int
1327ncl_readlinkrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1328{
1329 int error, ret, attrflag;
1330 struct nfsvattr nfsva;
1331
1332 error = nfsrpc_readlink(vp, uiop, cred, uiop->uio_td, &nfsva,
1333 &attrflag, NULL);
1334 if (attrflag) {
1335 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1336 if (ret && !error)
1337 error = ret;
1338 }
1339 if (error && NFS_ISV4(vp))
1340 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1341 return (error);
1342}
1343
1344/*
1345 * nfs read rpc call
1346 * Ditto above
1347 */
1348int
1349ncl_readrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1350{
1351 int error, ret, attrflag;
1352 struct nfsvattr nfsva;
1353
1354 error = nfsrpc_read(vp, uiop, cred, uiop->uio_td, &nfsva, &attrflag,
1355 NULL);
1356 if (attrflag) {
1357 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1358 if (ret && !error)
1359 error = ret;
1360 }
1361 if (error && NFS_ISV4(vp))
1362 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1363 return (error);
1364}
1365
1366/*
1367 * nfs write call
1368 */
1369int
1370ncl_writerpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
1371 int *iomode, int *must_commit, int called_from_strategy)
1372{
1373 struct nfsvattr nfsva;
1374 int error = 0, attrflag, ret;
1375
1376 error = nfsrpc_write(vp, uiop, iomode, must_commit, cred,
1377 uiop->uio_td, &nfsva, &attrflag, NULL, called_from_strategy);
1378 if (attrflag) {
1379 if (VTONFS(vp)->n_flag & ND_NFSV4)
1380 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 1,
1381 1);
1382 else
1383 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
1384 1);
1385 if (ret && !error)
1386 error = ret;
1387 }
1388 if (vp->v_mount->mnt_kern_flag & MNTK_ASYNC)
1389 *iomode = NFSWRITE_FILESYNC;
1390 if (error && NFS_ISV4(vp))
1391 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1392 return (error);
1393}
1394
1395/*
1396 * nfs mknod rpc
1397 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1398 * mode set to specify the file type and the size field for rdev.
1399 */
1400static int
1401nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1402 struct vattr *vap)
1403{
1404 struct nfsvattr nfsva, dnfsva;
1405 struct vnode *newvp = NULL;
1406 struct nfsnode *np = NULL, *dnp;
1407 struct nfsfh *nfhp;
1408 struct vattr vattr;
1409 int error = 0, attrflag, dattrflag;
1410 u_int32_t rdev;
1411
1412 if (vap->va_type == VCHR || vap->va_type == VBLK)
1413 rdev = vap->va_rdev;
1414 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1415 rdev = 0xffffffff;
1416 else
1417 return (EOPNOTSUPP);
1418 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1419 return (error);
1420 error = nfsrpc_mknod(dvp, cnp->cn_nameptr, cnp->cn_namelen, vap,
1421 rdev, vap->va_type, cnp->cn_cred, cnp->cn_thread, &dnfsva,
1422 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
1423 if (!error) {
1424 if (!nfhp)
1425 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
1426 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread,
1427 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1428 NULL);
1429 if (nfhp)
1430 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
1431 cnp->cn_thread, &np, NULL, LK_EXCLUSIVE);
1432 }
1433 if (dattrflag)
1434 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1435 if (!error) {
1436 newvp = NFSTOV(np);
1437 if (attrflag != 0) {
1438 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1439 0, 1);
1440 if (error != 0)
1441 vput(newvp);
1442 }
1443 }
1444 if (!error) {
1445 if ((cnp->cn_flags & MAKEENTRY))
1446 cache_enter(dvp, newvp, cnp);
1447 *vpp = newvp;
1448 } else if (NFS_ISV4(dvp)) {
1449 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1450 vap->va_gid);
1451 }
1452 dnp = VTONFS(dvp);
1453 mtx_lock(&dnp->n_mtx);
1454 dnp->n_flag |= NMODIFIED;
1455 if (!dattrflag) {
1456 dnp->n_attrstamp = 0;
1457 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1458 }
1459 mtx_unlock(&dnp->n_mtx);
1460 return (error);
1461}
1462
1463/*
1464 * nfs mknod vop
1465 * just call nfs_mknodrpc() to do the work.
1466 */
1467/* ARGSUSED */
1468static int
1469nfs_mknod(struct vop_mknod_args *ap)
1470{
1471 return (nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap));
1472}
1473
1474static struct mtx nfs_cverf_mtx;
1475MTX_SYSINIT(nfs_cverf_mtx, &nfs_cverf_mtx, "NFS create verifier mutex",
1476 MTX_DEF);
1477
1478static nfsquad_t
1479nfs_get_cverf(void)
1480{
1481 static nfsquad_t cverf;
1482 nfsquad_t ret;
1483 static int cverf_initialized = 0;
1484
1485 mtx_lock(&nfs_cverf_mtx);
1486 if (cverf_initialized == 0) {
1487 cverf.lval[0] = arc4random();
1488 cverf.lval[1] = arc4random();
1489 cverf_initialized = 1;
1490 } else
1491 cverf.qval++;
1492 ret = cverf;
1493 mtx_unlock(&nfs_cverf_mtx);
1494
1495 return (ret);
1496}
1497
1498/*
1499 * nfs file create call
1500 */
1501static int
1502nfs_create(struct vop_create_args *ap)
1503{
1504 struct vnode *dvp = ap->a_dvp;
1505 struct vattr *vap = ap->a_vap;
1506 struct componentname *cnp = ap->a_cnp;
1507 struct nfsnode *np = NULL, *dnp;
1508 struct vnode *newvp = NULL;
1509 struct nfsmount *nmp;
1510 struct nfsvattr dnfsva, nfsva;
1511 struct nfsfh *nfhp;
1512 nfsquad_t cverf;
1513 int error = 0, attrflag, dattrflag, fmode = 0;
1514 struct vattr vattr;
1515
1516 /*
1517 * Oops, not for me..
1518 */
1519 if (vap->va_type == VSOCK)
1520 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1521
1522 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1523 return (error);
1524 if (vap->va_vaflags & VA_EXCLUSIVE)
1525 fmode |= O_EXCL;
1526 dnp = VTONFS(dvp);
1527 nmp = VFSTONFS(vnode_mount(dvp));
1528again:
1529 /* For NFSv4, wait until any remove is done. */
1530 mtx_lock(&dnp->n_mtx);
1531 while (NFSHASNFSV4(nmp) && (dnp->n_flag & NREMOVEINPROG)) {
1532 dnp->n_flag |= NREMOVEWANT;
1533 (void) msleep((caddr_t)dnp, &dnp->n_mtx, PZERO, "nfscrt", 0);
1534 }
1535 mtx_unlock(&dnp->n_mtx);
1536
1537 cverf = nfs_get_cverf();
1538 error = nfsrpc_create(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1539 vap, cverf, fmode, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva,
1540 &nfhp, &attrflag, &dattrflag, NULL);
1541 if (!error) {
1542 if (nfhp == NULL)
1543 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
1544 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread,
1545 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1546 NULL);
1547 if (nfhp != NULL)
1548 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
1549 cnp->cn_thread, &np, NULL, LK_EXCLUSIVE);
1550 }
1551 if (dattrflag)
1552 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1553 if (!error) {
1554 newvp = NFSTOV(np);
1555 if (attrflag)
1556 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1557 0, 1);
1558 }
1559 if (error) {
1560 if (newvp != NULL) {
1561 vput(newvp);
1562 newvp = NULL;
1563 }
1564 if (NFS_ISV34(dvp) && (fmode & O_EXCL) &&
1565 error == NFSERR_NOTSUPP) {
1566 fmode &= ~O_EXCL;
1567 goto again;
1568 }
1569 } else if (NFS_ISV34(dvp) && (fmode & O_EXCL)) {
1570 if (nfscl_checksattr(vap, &nfsva)) {
1571 /*
1572 * We are normally called with only a partially
1573 * initialized VAP. Since the NFSv3 spec says that
1574 * the server may use the file attributes to
1575 * store the verifier, the spec requires us to do a
1576 * SETATTR RPC. FreeBSD servers store the verifier in
1577 * atime, but we can't really assume that all servers
1578 * will so we ensure that our SETATTR sets both atime
1579 * and mtime.
1580 */
1581 if (vap->va_mtime.tv_sec == VNOVAL)
1582 vfs_timestamp(&vap->va_mtime);
1583 if (vap->va_atime.tv_sec == VNOVAL)
1584 vap->va_atime = vap->va_mtime;
1585 error = nfsrpc_setattr(newvp, vap, NULL, cnp->cn_cred,
1586 cnp->cn_thread, &nfsva, &attrflag, NULL);
1587 if (error && (vap->va_uid != (uid_t)VNOVAL ||
1588 vap->va_gid != (gid_t)VNOVAL)) {
1589 /* try again without setting uid/gid */
1590 vap->va_uid = (uid_t)VNOVAL;
1591 vap->va_gid = (uid_t)VNOVAL;
1592 error = nfsrpc_setattr(newvp, vap, NULL,
1593 cnp->cn_cred, cnp->cn_thread, &nfsva,
1594 &attrflag, NULL);
1595 }
1596 if (attrflag)
1597 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
1598 NULL, 0, 1);
1599 if (error != 0)
1600 vput(newvp);
1601 }
1602 }
1603 if (!error) {
1604 if (cnp->cn_flags & MAKEENTRY)
1605 cache_enter(dvp, newvp, cnp);
1606 *ap->a_vpp = newvp;
1607 } else if (NFS_ISV4(dvp)) {
1608 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1609 vap->va_gid);
1610 }
1611 mtx_lock(&dnp->n_mtx);
1612 dnp->n_flag |= NMODIFIED;
1613 if (!dattrflag) {
1614 dnp->n_attrstamp = 0;
1615 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1616 }
1617 mtx_unlock(&dnp->n_mtx);
1618 return (error);
1619}
1620
1621/*
1622 * nfs file remove call
1623 * To try and make nfs semantics closer to ufs semantics, a file that has
1624 * other processes using the vnode is renamed instead of removed and then
1625 * removed later on the last close.
1626 * - If v_usecount > 1
1627 * If a rename is not already in the works
1628 * call nfs_sillyrename() to set it up
1629 * else
1630 * do the remove rpc
1631 */
1632static int
1633nfs_remove(struct vop_remove_args *ap)
1634{
1635 struct vnode *vp = ap->a_vp;
1636 struct vnode *dvp = ap->a_dvp;
1637 struct componentname *cnp = ap->a_cnp;
1638 struct nfsnode *np = VTONFS(vp);
1639 int error = 0;
1640 struct vattr vattr;
1641
1642 KASSERT((cnp->cn_flags & HASBUF) != 0, ("nfs_remove: no name"));
1643 KASSERT(vrefcnt(vp) > 0, ("nfs_remove: bad v_usecount"));
1644 if (vp->v_type == VDIR)
1645 error = EPERM;
1646 else if (vrefcnt(vp) == 1 || (np->n_sillyrename &&
1647 VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 &&
1648 vattr.va_nlink > 1)) {
1649 /*
1650 * Purge the name cache so that the chance of a lookup for
1651 * the name succeeding while the remove is in progress is
1652 * minimized. Without node locking it can still happen, such
1653 * that an I/O op returns ESTALE, but since you get this if
1654 * another host removes the file..
1655 */
1656 cache_purge(vp);
1657 /*
1658 * throw away biocache buffers, mainly to avoid
1659 * unnecessary delayed writes later.
1660 */
1661 error = ncl_vinvalbuf(vp, 0, cnp->cn_thread, 1);
1662 /* Do the rpc */
1663 if (error != EINTR && error != EIO)
1664 error = nfs_removerpc(dvp, vp, cnp->cn_nameptr,
1665 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread);
1666 /*
1667 * Kludge City: If the first reply to the remove rpc is lost..
1668 * the reply to the retransmitted request will be ENOENT
1669 * since the file was in fact removed
1670 * Therefore, we cheat and return success.
1671 */
1672 if (error == ENOENT)
1673 error = 0;
1674 } else if (!np->n_sillyrename)
1675 error = nfs_sillyrename(dvp, vp, cnp);
1676 mtx_lock(&np->n_mtx);
1677 np->n_attrstamp = 0;
1678 mtx_unlock(&np->n_mtx);
1679 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
1680 return (error);
1681}
1682
1683/*
1684 * nfs file remove rpc called from nfs_inactive
1685 */
1686int
1687ncl_removeit(struct sillyrename *sp, struct vnode *vp)
1688{
1689 /*
1690 * Make sure that the directory vnode is still valid.
1691 * XXX we should lock sp->s_dvp here.
1692 */
1693 if (sp->s_dvp->v_type == VBAD)
1694 return (0);
1695 return (nfs_removerpc(sp->s_dvp, vp, sp->s_name, sp->s_namlen,
1696 sp->s_cred, NULL));
1697}
1698
1699/*
1700 * Nfs remove rpc, called from nfs_remove() and ncl_removeit().
1701 */
1702static int
1703nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
1704 int namelen, struct ucred *cred, struct thread *td)
1705{
1706 struct nfsvattr dnfsva;
1707 struct nfsnode *dnp = VTONFS(dvp);
1708 int error = 0, dattrflag;
1709
1710 mtx_lock(&dnp->n_mtx);
1711 dnp->n_flag |= NREMOVEINPROG;
1712 mtx_unlock(&dnp->n_mtx);
1713 error = nfsrpc_remove(dvp, name, namelen, vp, cred, td, &dnfsva,
1714 &dattrflag, NULL);
1715 mtx_lock(&dnp->n_mtx);
1716 if ((dnp->n_flag & NREMOVEWANT)) {
1717 dnp->n_flag &= ~(NREMOVEWANT | NREMOVEINPROG);
1718 mtx_unlock(&dnp->n_mtx);
1719 wakeup((caddr_t)dnp);
1720 } else {
1721 dnp->n_flag &= ~NREMOVEINPROG;
1722 mtx_unlock(&dnp->n_mtx);
1723 }
1724 if (dattrflag)
1725 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1726 mtx_lock(&dnp->n_mtx);
1727 dnp->n_flag |= NMODIFIED;
1728 if (!dattrflag) {
1729 dnp->n_attrstamp = 0;
1730 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1731 }
1732 mtx_unlock(&dnp->n_mtx);
1733 if (error && NFS_ISV4(dvp))
1734 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1735 return (error);
1736}
1737
1738/*
1739 * nfs file rename call
1740 */
1741static int
1742nfs_rename(struct vop_rename_args *ap)
1743{
1744 struct vnode *fvp = ap->a_fvp;
1745 struct vnode *tvp = ap->a_tvp;
1746 struct vnode *fdvp = ap->a_fdvp;
1747 struct vnode *tdvp = ap->a_tdvp;
1748 struct componentname *tcnp = ap->a_tcnp;
1749 struct componentname *fcnp = ap->a_fcnp;
1750 struct nfsnode *fnp = VTONFS(ap->a_fvp);
1751 struct nfsnode *tdnp = VTONFS(ap->a_tdvp);
1752 struct nfsv4node *newv4 = NULL;
1753 int error;
1754
1755 KASSERT((tcnp->cn_flags & HASBUF) != 0 &&
1756 (fcnp->cn_flags & HASBUF) != 0, ("nfs_rename: no name"));
1757 /* Check for cross-device rename */
1758 if ((fvp->v_mount != tdvp->v_mount) ||
1759 (tvp && (fvp->v_mount != tvp->v_mount))) {
1760 error = EXDEV;
1761 goto out;
1762 }
1763
1764 if (fvp == tvp) {
1765 ncl_printf("nfs_rename: fvp == tvp (can't happen)\n");
1766 error = 0;
1767 goto out;
1768 }
1769 if ((error = NFSVOPLOCK(fvp, LK_EXCLUSIVE)) != 0)
1770 goto out;
1771
1772 /*
1773 * We have to flush B_DELWRI data prior to renaming
1774 * the file. If we don't, the delayed-write buffers
1775 * can be flushed out later after the file has gone stale
1776 * under NFSV3. NFSV2 does not have this problem because
1777 * ( as far as I can tell ) it flushes dirty buffers more
1778 * often.
1779 *
1780 * Skip the rename operation if the fsync fails, this can happen
1781 * due to the server's volume being full, when we pushed out data
1782 * that was written back to our cache earlier. Not checking for
1783 * this condition can result in potential (silent) data loss.
1784 */
1785 error = VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_thread);
1786 NFSVOPUNLOCK(fvp, 0);
1787 if (!error && tvp)
1788 error = VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_thread);
1789 if (error)
1790 goto out;
1791
1792 /*
1793 * If the tvp exists and is in use, sillyrename it before doing the
1794 * rename of the new file over it.
1795 * XXX Can't sillyrename a directory.
1796 */
1797 if (tvp && vrefcnt(tvp) > 1 && !VTONFS(tvp)->n_sillyrename &&
1798 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1799 vput(tvp);
1800 tvp = NULL;
1801 }
1802
1803 error = nfs_renamerpc(fdvp, fvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1804 tdvp, tvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1805 tcnp->cn_thread);
1806
1807 if (error == 0 && NFS_ISV4(tdvp)) {
1808 /*
1809 * For NFSv4, check to see if it is the same name and
1810 * replace the name, if it is different.
1811 */
1812 MALLOC(newv4, struct nfsv4node *,
1813 sizeof (struct nfsv4node) +
1814 tdnp->n_fhp->nfh_len + tcnp->cn_namelen - 1,
1815 M_NFSV4NODE, M_WAITOK);
1816 mtx_lock(&tdnp->n_mtx);
1817 mtx_lock(&fnp->n_mtx);
1818 if (fnp->n_v4 != NULL && fvp->v_type == VREG &&
1819 (fnp->n_v4->n4_namelen != tcnp->cn_namelen ||
1820 NFSBCMP(tcnp->cn_nameptr, NFS4NODENAME(fnp->n_v4),
1821 tcnp->cn_namelen) ||
1822 tdnp->n_fhp->nfh_len != fnp->n_v4->n4_fhlen ||
1823 NFSBCMP(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1824 tdnp->n_fhp->nfh_len))) {
1825#ifdef notdef
1826{ char nnn[100]; int nnnl;
1827nnnl = (tcnp->cn_namelen < 100) ? tcnp->cn_namelen : 99;
1828bcopy(tcnp->cn_nameptr, nnn, nnnl);
1829nnn[nnnl] = '\0';
1830printf("ren replace=%s\n",nnn);
1831}
1832#endif
1833 FREE((caddr_t)fnp->n_v4, M_NFSV4NODE);
1834 fnp->n_v4 = newv4;
1835 newv4 = NULL;
1836 fnp->n_v4->n4_fhlen = tdnp->n_fhp->nfh_len;
1837 fnp->n_v4->n4_namelen = tcnp->cn_namelen;
1838 NFSBCOPY(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1839 tdnp->n_fhp->nfh_len);
1840 NFSBCOPY(tcnp->cn_nameptr,
1841 NFS4NODENAME(fnp->n_v4), tcnp->cn_namelen);
1842 }
1843 mtx_unlock(&tdnp->n_mtx);
1844 mtx_unlock(&fnp->n_mtx);
1845 if (newv4 != NULL)
1846 FREE((caddr_t)newv4, M_NFSV4NODE);
1847 }
1848
1849 if (fvp->v_type == VDIR) {
1850 if (tvp != NULL && tvp->v_type == VDIR)
1851 cache_purge(tdvp);
1852 cache_purge(fdvp);
1853 }
1854
1855out:
1856 if (tdvp == tvp)
1857 vrele(tdvp);
1858 else
1859 vput(tdvp);
1860 if (tvp)
1861 vput(tvp);
1862 vrele(fdvp);
1863 vrele(fvp);
1864 /*
1865 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1866 */
1867 if (error == ENOENT)
1868 error = 0;
1869 return (error);
1870}
1871
1872/*
1873 * nfs file rename rpc called from nfs_remove() above
1874 */
1875static int
1876nfs_renameit(struct vnode *sdvp, struct vnode *svp, struct componentname *scnp,
1877 struct sillyrename *sp)
1878{
1879
1880 return (nfs_renamerpc(sdvp, svp, scnp->cn_nameptr, scnp->cn_namelen,
1881 sdvp, NULL, sp->s_name, sp->s_namlen, scnp->cn_cred,
1882 scnp->cn_thread));
1883}
1884
1885/*
1886 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1887 */
1888static int
1889nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, char *fnameptr,
1890 int fnamelen, struct vnode *tdvp, struct vnode *tvp, char *tnameptr,
1891 int tnamelen, struct ucred *cred, struct thread *td)
1892{
1893 struct nfsvattr fnfsva, tnfsva;
1894 struct nfsnode *fdnp = VTONFS(fdvp);
1895 struct nfsnode *tdnp = VTONFS(tdvp);
1896 int error = 0, fattrflag, tattrflag;
1897
1898 error = nfsrpc_rename(fdvp, fvp, fnameptr, fnamelen, tdvp, tvp,
1899 tnameptr, tnamelen, cred, td, &fnfsva, &tnfsva, &fattrflag,
1900 &tattrflag, NULL, NULL);
1901 mtx_lock(&fdnp->n_mtx);
1902 fdnp->n_flag |= NMODIFIED;
1903 if (fattrflag != 0) {
1904 mtx_unlock(&fdnp->n_mtx);
1905 (void) nfscl_loadattrcache(&fdvp, &fnfsva, NULL, NULL, 0, 1);
1906 } else {
1907 fdnp->n_attrstamp = 0;
1908 mtx_unlock(&fdnp->n_mtx);
1909 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(fdvp);
1910 }
1911 mtx_lock(&tdnp->n_mtx);
1912 tdnp->n_flag |= NMODIFIED;
1913 if (tattrflag != 0) {
1914 mtx_unlock(&tdnp->n_mtx);
1915 (void) nfscl_loadattrcache(&tdvp, &tnfsva, NULL, NULL, 0, 1);
1916 } else {
1917 tdnp->n_attrstamp = 0;
1918 mtx_unlock(&tdnp->n_mtx);
1919 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp);
1920 }
1921 if (error && NFS_ISV4(fdvp))
1922 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1923 return (error);
1924}
1925
1926/*
1927 * nfs hard link create call
1928 */
1929static int
1930nfs_link(struct vop_link_args *ap)
1931{
1932 struct vnode *vp = ap->a_vp;
1933 struct vnode *tdvp = ap->a_tdvp;
1934 struct componentname *cnp = ap->a_cnp;
1935 struct nfsnode *np, *tdnp;
1936 struct nfsvattr nfsva, dnfsva;
1937 int error = 0, attrflag, dattrflag;
1938
1939 if (vp->v_mount != tdvp->v_mount) {
1940 return (EXDEV);
1941 }
1942
1943 /*
1944 * Push all writes to the server, so that the attribute cache
1945 * doesn't get "out of sync" with the server.
1946 * XXX There should be a better way!
1947 */
1948 VOP_FSYNC(vp, MNT_WAIT, cnp->cn_thread);
1949
1950 error = nfsrpc_link(tdvp, vp, cnp->cn_nameptr, cnp->cn_namelen,
1951 cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &attrflag,
1952 &dattrflag, NULL);
1953 tdnp = VTONFS(tdvp);
1954 mtx_lock(&tdnp->n_mtx);
1955 tdnp->n_flag |= NMODIFIED;
1956 if (dattrflag != 0) {
1957 mtx_unlock(&tdnp->n_mtx);
1958 (void) nfscl_loadattrcache(&tdvp, &dnfsva, NULL, NULL, 0, 1);
1959 } else {
1960 tdnp->n_attrstamp = 0;
1961 mtx_unlock(&tdnp->n_mtx);
1962 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp);
1963 }
1964 if (attrflag)
1965 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1966 else {
1967 np = VTONFS(vp);
1968 mtx_lock(&np->n_mtx);
1969 np->n_attrstamp = 0;
1970 mtx_unlock(&np->n_mtx);
1971 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
1972 }
1973 /*
1974 * If negative lookup caching is enabled, I might as well
1975 * add an entry for this node. Not necessary for correctness,
1976 * but if negative caching is enabled, then the system
1977 * must care about lookup caching hit rate, so...
1978 */
1979 if (VFSTONFS(vp->v_mount)->nm_negnametimeo != 0 &&
1980 (cnp->cn_flags & MAKEENTRY))
1981 cache_enter(tdvp, vp, cnp);
1982 if (error && NFS_ISV4(vp))
1983 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
1984 (gid_t)0);
1985 return (error);
1986}
1987
1988/*
1989 * nfs symbolic link create call
1990 */
1991static int
1992nfs_symlink(struct vop_symlink_args *ap)
1993{
1994 struct vnode *dvp = ap->a_dvp;
1995 struct vattr *vap = ap->a_vap;
1996 struct componentname *cnp = ap->a_cnp;
1997 struct nfsvattr nfsva, dnfsva;
1998 struct nfsfh *nfhp;
1999 struct nfsnode *np = NULL, *dnp;
2000 struct vnode *newvp = NULL;
2001 int error = 0, attrflag, dattrflag, ret;
2002
2003 vap->va_type = VLNK;
2004 error = nfsrpc_symlink(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2005 ap->a_target, vap, cnp->cn_cred, cnp->cn_thread, &dnfsva,
2006 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
2007 if (nfhp) {
2008 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
2009 &np, NULL, LK_EXCLUSIVE);
2010 if (!ret)
2011 newvp = NFSTOV(np);
2012 else if (!error)
2013 error = ret;
2014 }
2015 if (newvp != NULL) {
2016 if (attrflag)
2017 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
2018 0, 1);
2019 } else if (!error) {
2020 /*
2021 * If we do not have an error and we could not extract the
2022 * newvp from the response due to the request being NFSv2, we
2023 * have to do a lookup in order to obtain a newvp to return.
2024 */
2025 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2026 cnp->cn_cred, cnp->cn_thread, &np);
2027 if (!error)
2028 newvp = NFSTOV(np);
2029 }
2030 if (error) {
2031 if (newvp)
2032 vput(newvp);
2033 if (NFS_ISV4(dvp))
2034 error = nfscl_maperr(cnp->cn_thread, error,
2035 vap->va_uid, vap->va_gid);
2036 } else {
2037 /*
2038 * If negative lookup caching is enabled, I might as well
2039 * add an entry for this node. Not necessary for correctness,
2040 * but if negative caching is enabled, then the system
2041 * must care about lookup caching hit rate, so...
2042 */
2043 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 &&
2044 (cnp->cn_flags & MAKEENTRY))
2045 cache_enter(dvp, newvp, cnp);
2046 *ap->a_vpp = newvp;
2047 }
2048
2049 dnp = VTONFS(dvp);
2050 mtx_lock(&dnp->n_mtx);
2051 dnp->n_flag |= NMODIFIED;
2052 if (dattrflag != 0) {
2053 mtx_unlock(&dnp->n_mtx);
2054 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2055 } else {
2056 dnp->n_attrstamp = 0;
2057 mtx_unlock(&dnp->n_mtx);
2058 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2059 }
2060 return (error);
2061}
2062
2063/*
2064 * nfs make dir call
2065 */
2066static int
2067nfs_mkdir(struct vop_mkdir_args *ap)
2068{
2069 struct vnode *dvp = ap->a_dvp;
2070 struct vattr *vap = ap->a_vap;
2071 struct componentname *cnp = ap->a_cnp;
2072 struct nfsnode *np = NULL, *dnp;
2073 struct vnode *newvp = NULL;
2074 struct vattr vattr;
2075 struct nfsfh *nfhp;
2076 struct nfsvattr nfsva, dnfsva;
2077 int error = 0, attrflag, dattrflag, ret;
2078
2079 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)) != 0)
2080 return (error);
2081 vap->va_type = VDIR;
2082 error = nfsrpc_mkdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2083 vap, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &nfhp,
2084 &attrflag, &dattrflag, NULL);
2085 dnp = VTONFS(dvp);
2086 mtx_lock(&dnp->n_mtx);
2087 dnp->n_flag |= NMODIFIED;
2088 if (dattrflag != 0) {
2089 mtx_unlock(&dnp->n_mtx);
2090 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2091 } else {
2092 dnp->n_attrstamp = 0;
2093 mtx_unlock(&dnp->n_mtx);
2094 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2095 }
2096 if (nfhp) {
2097 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
2098 &np, NULL, LK_EXCLUSIVE);
2099 if (!ret) {
2100 newvp = NFSTOV(np);
2101 if (attrflag)
2102 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
2103 NULL, 0, 1);
2104 } else if (!error)
2105 error = ret;
2106 }
2107 if (!error && newvp == NULL) {
2108 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2109 cnp->cn_cred, cnp->cn_thread, &np);
2110 if (!error) {
2111 newvp = NFSTOV(np);
2112 if (newvp->v_type != VDIR)
2113 error = EEXIST;
2114 }
2115 }
2116 if (error) {
2117 if (newvp)
2118 vput(newvp);
2119 if (NFS_ISV4(dvp))
2120 error = nfscl_maperr(cnp->cn_thread, error,
2121 vap->va_uid, vap->va_gid);
2122 } else {
2123 /*
2124 * If negative lookup caching is enabled, I might as well
2125 * add an entry for this node. Not necessary for correctness,
2126 * but if negative caching is enabled, then the system
2127 * must care about lookup caching hit rate, so...
2128 */
2129 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 &&
2130 (cnp->cn_flags & MAKEENTRY))
2131 cache_enter(dvp, newvp, cnp);
2132 *ap->a_vpp = newvp;
2133 }
2134 return (error);
2135}
2136
2137/*
2138 * nfs remove directory call
2139 */
2140static int
2141nfs_rmdir(struct vop_rmdir_args *ap)
2142{
2143 struct vnode *vp = ap->a_vp;
2144 struct vnode *dvp = ap->a_dvp;
2145 struct componentname *cnp = ap->a_cnp;
2146 struct nfsnode *dnp;
2147 struct nfsvattr dnfsva;
2148 int error, dattrflag;
2149
2150 if (dvp == vp)
2151 return (EINVAL);
2152 error = nfsrpc_rmdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2153 cnp->cn_cred, cnp->cn_thread, &dnfsva, &dattrflag, NULL);
2154 dnp = VTONFS(dvp);
2155 mtx_lock(&dnp->n_mtx);
2156 dnp->n_flag |= NMODIFIED;
2157 if (dattrflag != 0) {
2158 mtx_unlock(&dnp->n_mtx);
2159 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2160 } else {
2161 dnp->n_attrstamp = 0;
2162 mtx_unlock(&dnp->n_mtx);
2163 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2164 }
2165
2166 cache_purge(dvp);
2167 cache_purge(vp);
2168 if (error && NFS_ISV4(dvp))
2169 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
2170 (gid_t)0);
2171 /*
2172 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2173 */
2174 if (error == ENOENT)
2175 error = 0;
2176 return (error);
2177}
2178
2179/*
2180 * nfs readdir call
2181 */
2182static int
2183nfs_readdir(struct vop_readdir_args *ap)
2184{
2185 struct vnode *vp = ap->a_vp;
2186 struct nfsnode *np = VTONFS(vp);
2187 struct uio *uio = ap->a_uio;
2188 int tresid, error = 0;
2189 struct vattr vattr;
2190
2191 if (vp->v_type != VDIR)
2192 return(EPERM);
2193
2194 /*
2195 * First, check for hit on the EOF offset cache
2196 */
2197 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2198 (np->n_flag & NMODIFIED) == 0) {
2199 if (VOP_GETATTR(vp, &vattr, ap->a_cred) == 0) {
2200 mtx_lock(&np->n_mtx);
2201 if ((NFS_ISV4(vp) && np->n_change == vattr.va_filerev) ||
2202 !NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
2203 mtx_unlock(&np->n_mtx);
2204 NFSINCRGLOBAL(newnfsstats.direofcache_hits);
2205 return (0);
2206 } else
2207 mtx_unlock(&np->n_mtx);
2208 }
2209 }
2210
2211 /*
2212 * Call ncl_bioread() to do the real work.
2213 */
2214 tresid = uio->uio_resid;
2215 error = ncl_bioread(vp, uio, 0, ap->a_cred);
2216
2217 if (!error && uio->uio_resid == tresid)
2218 NFSINCRGLOBAL(newnfsstats.direofcache_misses);
2219 return (error);
2220}
2221
2222/*
2223 * Readdir rpc call.
2224 * Called from below the buffer cache by ncl_doio().
2225 */
2226int
2227ncl_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2228 struct thread *td)
2229{
2230 struct nfsvattr nfsva;
2231 nfsuint64 *cookiep, cookie;
2232 struct nfsnode *dnp = VTONFS(vp);
2233 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2234 int error = 0, eof, attrflag;
2235
2236 KASSERT(uiop->uio_iovcnt == 1 &&
2237 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 &&
2238 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0,
2239 ("nfs readdirrpc bad uio"));
2240
2241 /*
2242 * If there is no cookie, assume directory was stale.
2243 */
2244 ncl_dircookie_lock(dnp);
2245 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2246 if (cookiep) {
2247 cookie = *cookiep;
2248 ncl_dircookie_unlock(dnp);
2249 } else {
2250 ncl_dircookie_unlock(dnp);
2251 return (NFSERR_BAD_COOKIE);
2252 }
2253
2254 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2255 (void)ncl_fsinfo(nmp, vp, cred, td);
2256
2257 error = nfsrpc_readdir(vp, uiop, &cookie, cred, td, &nfsva,
2258 &attrflag, &eof, NULL);
2259 if (attrflag)
2260 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2261
2262 if (!error) {
2263 /*
2264 * We are now either at the end of the directory or have filled
2265 * the block.
2266 */
2267 if (eof)
2268 dnp->n_direofoffset = uiop->uio_offset;
2269 else {
2270 if (uiop->uio_resid > 0)
2271 ncl_printf("EEK! readdirrpc resid > 0\n");
2272 ncl_dircookie_lock(dnp);
2273 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2274 *cookiep = cookie;
2275 ncl_dircookie_unlock(dnp);
2276 }
2277 } else if (NFS_ISV4(vp)) {
2278 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2279 }
2280 return (error);
2281}
2282
2283/*
2284 * NFS V3 readdir plus RPC. Used in place of ncl_readdirrpc().
2285 */
2286int
2287ncl_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2288 struct thread *td)
2289{
2290 struct nfsvattr nfsva;
2291 nfsuint64 *cookiep, cookie;
2292 struct nfsnode *dnp = VTONFS(vp);
2293 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2294 int error = 0, attrflag, eof;
2295
2296 KASSERT(uiop->uio_iovcnt == 1 &&
2297 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 &&
2298 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0,
2299 ("nfs readdirplusrpc bad uio"));
2300
2301 /*
2302 * If there is no cookie, assume directory was stale.
2303 */
2304 ncl_dircookie_lock(dnp);
2305 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2306 if (cookiep) {
2307 cookie = *cookiep;
2308 ncl_dircookie_unlock(dnp);
2309 } else {
2310 ncl_dircookie_unlock(dnp);
2311 return (NFSERR_BAD_COOKIE);
2312 }
2313
2314 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2315 (void)ncl_fsinfo(nmp, vp, cred, td);
2316 error = nfsrpc_readdirplus(vp, uiop, &cookie, cred, td, &nfsva,
2317 &attrflag, &eof, NULL);
2318 if (attrflag)
2319 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2320
2321 if (!error) {
2322 /*
2323 * We are now either at end of the directory or have filled the
2324 * the block.
2325 */
2326 if (eof)
2327 dnp->n_direofoffset = uiop->uio_offset;
2328 else {
2329 if (uiop->uio_resid > 0)
2330 ncl_printf("EEK! readdirplusrpc resid > 0\n");
2331 ncl_dircookie_lock(dnp);
2332 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2333 *cookiep = cookie;
2334 ncl_dircookie_unlock(dnp);
2335 }
2336 } else if (NFS_ISV4(vp)) {
2337 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2338 }
2339 return (error);
2340}
2341
2342/*
2343 * Silly rename. To make the NFS filesystem that is stateless look a little
2344 * more like the "ufs" a remove of an active vnode is translated to a rename
2345 * to a funny looking filename that is removed by nfs_inactive on the
2346 * nfsnode. There is the potential for another process on a different client
2347 * to create the same funny name between the nfs_lookitup() fails and the
2348 * nfs_rename() completes, but...
2349 */
2350static int
2351nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
2352{
2353 struct sillyrename *sp;
2354 struct nfsnode *np;
2355 int error;
2356 short pid;
2357 unsigned int lticks;
2358
2359 cache_purge(dvp);
2360 np = VTONFS(vp);
2361 KASSERT(vp->v_type != VDIR, ("nfs: sillyrename dir"));
2362 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2363 M_NEWNFSREQ, M_WAITOK);
2364 sp->s_cred = crhold(cnp->cn_cred);
2365 sp->s_dvp = dvp;
2366 VREF(dvp);
2367
2368 /*
2369 * Fudge together a funny name.
2370 * Changing the format of the funny name to accomodate more
2371 * sillynames per directory.
2372 * The name is now changed to .nfs.<ticks>.<pid>.4, where ticks is
2373 * CPU ticks since boot.
2374 */
2375 pid = cnp->cn_thread->td_proc->p_pid;
2376 lticks = (unsigned int)ticks;
2377 for ( ; ; ) {
2378 sp->s_namlen = sprintf(sp->s_name,
2379 ".nfs.%08x.%04x4.4", lticks,
2380 pid);
2381 if (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2382 cnp->cn_thread, NULL))
2383 break;
2384 lticks++;
2385 }
2386 error = nfs_renameit(dvp, vp, cnp, sp);
2387 if (error)
2388 goto bad;
2389 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2390 cnp->cn_thread, &np);
2391 np->n_sillyrename = sp;
2392 return (0);
2393bad:
2394 vrele(sp->s_dvp);
2395 crfree(sp->s_cred);
2396 free((caddr_t)sp, M_NEWNFSREQ);
2397 return (error);
2398}
2399
2400/*
2401 * Look up a file name and optionally either update the file handle or
2402 * allocate an nfsnode, depending on the value of npp.
2403 * npp == NULL --> just do the lookup
2404 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2405 * handled too
2406 * *npp != NULL --> update the file handle in the vnode
2407 */
2408static int
2409nfs_lookitup(struct vnode *dvp, char *name, int len, struct ucred *cred,
2410 struct thread *td, struct nfsnode **npp)
2411{
2412 struct vnode *newvp = NULL, *vp;
2413 struct nfsnode *np, *dnp = VTONFS(dvp);
2414 struct nfsfh *nfhp, *onfhp;
2415 struct nfsvattr nfsva, dnfsva;
2416 struct componentname cn;
2417 int error = 0, attrflag, dattrflag;
2418 u_int hash;
2419
2420 error = nfsrpc_lookup(dvp, name, len, cred, td, &dnfsva, &nfsva,
2421 &nfhp, &attrflag, &dattrflag, NULL);
2422 if (dattrflag)
2423 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2424 if (npp && !error) {
2425 if (*npp != NULL) {
2426 np = *npp;
2427 vp = NFSTOV(np);
2428 /*
2429 * For NFSv4, check to see if it is the same name and
2430 * replace the name, if it is different.
2431 */
2432 if (np->n_v4 != NULL && nfsva.na_type == VREG &&
2433 (np->n_v4->n4_namelen != len ||
2434 NFSBCMP(name, NFS4NODENAME(np->n_v4), len) ||
2435 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
2436 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2437 dnp->n_fhp->nfh_len))) {
2438#ifdef notdef
2439{ char nnn[100]; int nnnl;
2440nnnl = (len < 100) ? len : 99;
2441bcopy(name, nnn, nnnl);
2442nnn[nnnl] = '\0';
2443printf("replace=%s\n",nnn);
2444}
2445#endif
2446 FREE((caddr_t)np->n_v4, M_NFSV4NODE);
2447 MALLOC(np->n_v4, struct nfsv4node *,
2448 sizeof (struct nfsv4node) +
2449 dnp->n_fhp->nfh_len + len - 1,
2450 M_NFSV4NODE, M_WAITOK);
2451 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len;
2452 np->n_v4->n4_namelen = len;
2453 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2454 dnp->n_fhp->nfh_len);
2455 NFSBCOPY(name, NFS4NODENAME(np->n_v4), len);
2456 }
2457 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len,
2458 FNV1_32_INIT);
2459 onfhp = np->n_fhp;
2460 /*
2461 * Rehash node for new file handle.
2462 */
2463 vfs_hash_rehash(vp, hash);
2464 np->n_fhp = nfhp;
2465 if (onfhp != NULL)
2466 FREE((caddr_t)onfhp, M_NFSFH);
2467 newvp = NFSTOV(np);
2468 } else if (NFS_CMPFH(dnp, nfhp->nfh_fh, nfhp->nfh_len)) {
2469 FREE((caddr_t)nfhp, M_NFSFH);
2470 VREF(dvp);
2471 newvp = dvp;
2472 } else {
2473 cn.cn_nameptr = name;
2474 cn.cn_namelen = len;
2475 error = nfscl_nget(dvp->v_mount, dvp, nfhp, &cn, td,
2476 &np, NULL, LK_EXCLUSIVE);
2477 if (error)
2478 return (error);
2479 newvp = NFSTOV(np);
2480 }
2481 if (!attrflag && *npp == NULL) {
2482 if (newvp == dvp)
2483 vrele(newvp);
2484 else
2485 vput(newvp);
2486 return (ENOENT);
2487 }
2488 if (attrflag)
2489 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
2490 0, 1);
2491 }
2492 if (npp && *npp == NULL) {
2493 if (error) {
2494 if (newvp) {
2495 if (newvp == dvp)
2496 vrele(newvp);
2497 else
2498 vput(newvp);
2499 }
2500 } else
2501 *npp = np;
2502 }
2503 if (error && NFS_ISV4(dvp))
2504 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2505 return (error);
2506}
2507
2508/*
2509 * Nfs Version 3 and 4 commit rpc
2510 */
2511int
2512ncl_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred,
2513 struct thread *td)
2514{
2515 struct nfsvattr nfsva;
2516 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2517 int error, attrflag;
2518 u_char verf[NFSX_VERF];
2519
2520 mtx_lock(&nmp->nm_mtx);
2521 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) {
2522 mtx_unlock(&nmp->nm_mtx);
2523 return (0);
2524 }
2525 mtx_unlock(&nmp->nm_mtx);
2526 error = nfsrpc_commit(vp, offset, cnt, cred, td, verf, &nfsva,
2527 &attrflag, NULL);
2528 if (!error) {
2529 mtx_lock(&nmp->nm_mtx);
2530 if (NFSBCMP((caddr_t)nmp->nm_verf, verf, NFSX_VERF)) {
2531 NFSBCOPY(verf, (caddr_t)nmp->nm_verf, NFSX_VERF);
2532 error = NFSERR_STALEWRITEVERF;
2533 }
2534 mtx_unlock(&nmp->nm_mtx);
2535 if (!error && attrflag)
2536 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL,
2537 0, 1);
2538 } else if (NFS_ISV4(vp)) {
2539 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2540 }
2541 return (error);
2542}
2543
2544/*
2545 * Strategy routine.
2546 * For async requests when nfsiod(s) are running, queue the request by
2547 * calling ncl_asyncio(), otherwise just all ncl_doio() to do the
2548 * request.
2549 */
2550static int
2551nfs_strategy(struct vop_strategy_args *ap)
2552{
2553 struct buf *bp = ap->a_bp;
2554 struct ucred *cr;
2555
2556 KASSERT(!(bp->b_flags & B_DONE),
2557 ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
2558 BUF_ASSERT_HELD(bp);
2559
2560 if (bp->b_iocmd == BIO_READ)
2561 cr = bp->b_rcred;
2562 else
2563 cr = bp->b_wcred;
2564
2565 /*
2566 * If the op is asynchronous and an i/o daemon is waiting
2567 * queue the request, wake it up and wait for completion
2568 * otherwise just do it ourselves.
2569 */
2570 if ((bp->b_flags & B_ASYNC) == 0 ||
2571 ncl_asyncio(VFSTONFS(ap->a_vp->v_mount), bp, NOCRED, curthread))
2572 (void) ncl_doio(ap->a_vp, bp, cr, curthread, 1);
2573 return (0);
2574}
2575
2576/*
2577 * fsync vnode op. Just call ncl_flush() with commit == 1.
2578 */
2579/* ARGSUSED */
2580static int
2581nfs_fsync(struct vop_fsync_args *ap)
2582{
2583
2584 if (ap->a_vp->v_type != VREG) {
2585 /*
2586 * For NFS, metadata is changed synchronously on the server,
2587 * so there is nothing to flush. Also, ncl_flush() clears
2588 * the NMODIFIED flag and that shouldn't be done here for
2589 * directories.
2590 */
2591 return (0);
2592 }
2593 return (ncl_flush(ap->a_vp, ap->a_waitfor, NULL, ap->a_td, 1, 0));
2594}
2595
2596/*
2597 * Flush all the blocks associated with a vnode.
2598 * Walk through the buffer pool and push any dirty pages
2599 * associated with the vnode.
2600 * If the called_from_renewthread argument is TRUE, it has been called
2601 * from the NFSv4 renew thread and, as such, cannot block indefinitely
2602 * waiting for a buffer write to complete.
2603 */
2604int
2605ncl_flush(struct vnode *vp, int waitfor, struct ucred *cred, struct thread *td,
2606 int commit, int called_from_renewthread)
2607{
2608 struct nfsnode *np = VTONFS(vp);
2609 struct buf *bp;
2610 int i;
2611 struct buf *nbp;
2612 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2613 int error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2614 int passone = 1, trycnt = 0;
2615 u_quad_t off, endoff, toff;
2616 struct ucred* wcred = NULL;
2617 struct buf **bvec = NULL;
2618 struct bufobj *bo;
2619#ifndef NFS_COMMITBVECSIZ
2620#define NFS_COMMITBVECSIZ 20
2621#endif
2622 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2623 int bvecsize = 0, bveccount;
2624
2625 if (called_from_renewthread != 0)
2626 slptimeo = hz;
2627 if (nmp->nm_flag & NFSMNT_INT)
2628 slpflag = NFS_PCATCH;
2629 if (!commit)
2630 passone = 0;
2631 bo = &vp->v_bufobj;
2632 /*
2633 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2634 * server, but has not been committed to stable storage on the server
2635 * yet. On the first pass, the byte range is worked out and the commit
2636 * rpc is done. On the second pass, ncl_writebp() is called to do the
2637 * job.
2638 */
2639again:
2640 off = (u_quad_t)-1;
2641 endoff = 0;
2642 bvecpos = 0;
2643 if (NFS_ISV34(vp) && commit) {
2644 if (bvec != NULL && bvec != bvec_on_stack)
2645 free(bvec, M_TEMP);
2646 /*
2647 * Count up how many buffers waiting for a commit.
2648 */
2649 bveccount = 0;
2650 BO_LOCK(bo);
2651 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2652 if (!BUF_ISLOCKED(bp) &&
2653 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2654 == (B_DELWRI | B_NEEDCOMMIT))
2655 bveccount++;
2656 }
2657 /*
2658 * Allocate space to remember the list of bufs to commit. It is
2659 * important to use M_NOWAIT here to avoid a race with nfs_write.
2660 * If we can't get memory (for whatever reason), we will end up
2661 * committing the buffers one-by-one in the loop below.
2662 */
2663 if (bveccount > NFS_COMMITBVECSIZ) {
2664 /*
2665 * Release the vnode interlock to avoid a lock
2666 * order reversal.
2667 */
2668 BO_UNLOCK(bo);
2669 bvec = (struct buf **)
2670 malloc(bveccount * sizeof(struct buf *),
2671 M_TEMP, M_NOWAIT);
2672 BO_LOCK(bo);
2673 if (bvec == NULL) {
2674 bvec = bvec_on_stack;
2675 bvecsize = NFS_COMMITBVECSIZ;
2676 } else
2677 bvecsize = bveccount;
2678 } else {
2679 bvec = bvec_on_stack;
2680 bvecsize = NFS_COMMITBVECSIZ;
2681 }
2682 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2683 if (bvecpos >= bvecsize)
2684 break;
2685 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2686 nbp = TAILQ_NEXT(bp, b_bobufs);
2687 continue;
2688 }
2689 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2690 (B_DELWRI | B_NEEDCOMMIT)) {
2691 BUF_UNLOCK(bp);
2692 nbp = TAILQ_NEXT(bp, b_bobufs);
2693 continue;
2694 }
2695 BO_UNLOCK(bo);
2696 bremfree(bp);
2697 /*
2698 * Work out if all buffers are using the same cred
2699 * so we can deal with them all with one commit.
2700 *
2701 * NOTE: we are not clearing B_DONE here, so we have
2702 * to do it later on in this routine if we intend to
2703 * initiate I/O on the bp.
2704 *
2705 * Note: to avoid loopback deadlocks, we do not
2706 * assign b_runningbufspace.
2707 */
2708 if (wcred == NULL)
2709 wcred = bp->b_wcred;
2710 else if (wcred != bp->b_wcred)
2711 wcred = NOCRED;
2712 vfs_busy_pages(bp, 1);
2713
2714 BO_LOCK(bo);
2715 /*
2716 * bp is protected by being locked, but nbp is not
2717 * and vfs_busy_pages() may sleep. We have to
2718 * recalculate nbp.
2719 */
2720 nbp = TAILQ_NEXT(bp, b_bobufs);
2721
2722 /*
2723 * A list of these buffers is kept so that the
2724 * second loop knows which buffers have actually
2725 * been committed. This is necessary, since there
2726 * may be a race between the commit rpc and new
2727 * uncommitted writes on the file.
2728 */
2729 bvec[bvecpos++] = bp;
2730 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2731 bp->b_dirtyoff;
2732 if (toff < off)
2733 off = toff;
2734 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2735 if (toff > endoff)
2736 endoff = toff;
2737 }
2738 BO_UNLOCK(bo);
2739 }
2740 if (bvecpos > 0) {
2741 /*
2742 * Commit data on the server, as required.
2743 * If all bufs are using the same wcred, then use that with
2744 * one call for all of them, otherwise commit each one
2745 * separately.
2746 */
2747 if (wcred != NOCRED)
2748 retv = ncl_commit(vp, off, (int)(endoff - off),
2749 wcred, td);
2750 else {
2751 retv = 0;
2752 for (i = 0; i < bvecpos; i++) {
2753 off_t off, size;
2754 bp = bvec[i];
2755 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2756 bp->b_dirtyoff;
2757 size = (u_quad_t)(bp->b_dirtyend
2758 - bp->b_dirtyoff);
2759 retv = ncl_commit(vp, off, (int)size,
2760 bp->b_wcred, td);
2761 if (retv) break;
2762 }
2763 }
2764
2765 if (retv == NFSERR_STALEWRITEVERF)
2766 ncl_clearcommit(vp->v_mount);
2767
2768 /*
2769 * Now, either mark the blocks I/O done or mark the
2770 * blocks dirty, depending on whether the commit
2771 * succeeded.
2772 */
2773 for (i = 0; i < bvecpos; i++) {
2774 bp = bvec[i];
2775 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
2776 if (retv) {
2777 /*
2778 * Error, leave B_DELWRI intact
2779 */
2780 vfs_unbusy_pages(bp);
2781 brelse(bp);
2782 } else {
2783 /*
2784 * Success, remove B_DELWRI ( bundirty() ).
2785 *
2786 * b_dirtyoff/b_dirtyend seem to be NFS
2787 * specific. We should probably move that
2788 * into bundirty(). XXX
2789 */
2790 bufobj_wref(bo);
2791 bp->b_flags |= B_ASYNC;
2792 bundirty(bp);
2793 bp->b_flags &= ~B_DONE;
2794 bp->b_ioflags &= ~BIO_ERROR;
2795 bp->b_dirtyoff = bp->b_dirtyend = 0;
2796 bufdone(bp);
2797 }
2798 }
2799 }
2800
2801 /*
2802 * Start/do any write(s) that are required.
2803 */
2804loop:
2805 BO_LOCK(bo);
2806 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2807 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2808 if (waitfor != MNT_WAIT || passone)
2809 continue;
2810
2811 error = BUF_TIMELOCK(bp,
2812 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK,
2813 BO_MTX(bo), "nfsfsync", slpflag, slptimeo);
2814 if (error == 0) {
2815 BUF_UNLOCK(bp);
2816 goto loop;
2817 }
2818 if (error == ENOLCK) {
2819 error = 0;
2820 goto loop;
2821 }
2822 if (called_from_renewthread != 0) {
2823 /*
2824 * Return EIO so the flush will be retried
2825 * later.
2826 */
2827 error = EIO;
2828 goto done;
2829 }
2830 if (newnfs_sigintr(nmp, td)) {
2831 error = EINTR;
2832 goto done;
2833 }
2834 if (slpflag & PCATCH) {
2835 slpflag = 0;
2836 slptimeo = 2 * hz;
2837 }
2838 goto loop;
2839 }
2840 if ((bp->b_flags & B_DELWRI) == 0)
2841 panic("nfs_fsync: not dirty");
2842 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
2843 BUF_UNLOCK(bp);
2844 continue;
2845 }
2846 BO_UNLOCK(bo);
2847 bremfree(bp);
2848 if (passone || !commit)
2849 bp->b_flags |= B_ASYNC;
2850 else
2851 bp->b_flags |= B_ASYNC;
2852 bwrite(bp);
2853 if (newnfs_sigintr(nmp, td)) {
2854 error = EINTR;
2855 goto done;
2856 }
2857 goto loop;
2858 }
2859 if (passone) {
2860 passone = 0;
2861 BO_UNLOCK(bo);
2862 goto again;
2863 }
2864 if (waitfor == MNT_WAIT) {
2865 while (bo->bo_numoutput) {
2866 error = bufobj_wwait(bo, slpflag, slptimeo);
2867 if (error) {
2868 BO_UNLOCK(bo);
2869 if (called_from_renewthread != 0) {
2870 /*
2871 * Return EIO so that the flush will be
2872 * retried later.
2873 */
2874 error = EIO;
2875 goto done;
2876 }
2877 error = newnfs_sigintr(nmp, td);
2878 if (error)
2879 goto done;
2880 if (slpflag & PCATCH) {
2881 slpflag = 0;
2882 slptimeo = 2 * hz;
2883 }
2884 BO_LOCK(bo);
2885 }
2886 }
2887 if (bo->bo_dirty.bv_cnt != 0 && commit) {
2888 BO_UNLOCK(bo);
2889 goto loop;
2890 }
2891 /*
2892 * Wait for all the async IO requests to drain
2893 */
2894 BO_UNLOCK(bo);
2895 mtx_lock(&np->n_mtx);
2896 while (np->n_directio_asyncwr > 0) {
2897 np->n_flag |= NFSYNCWAIT;
2898 error = newnfs_msleep(td, &np->n_directio_asyncwr,
2899 &np->n_mtx, slpflag | (PRIBIO + 1),
2900 "nfsfsync", 0);
2901 if (error) {
2902 if (newnfs_sigintr(nmp, td)) {
2903 mtx_unlock(&np->n_mtx);
2904 error = EINTR;
2905 goto done;
2906 }
2907 }
2908 }
2909 mtx_unlock(&np->n_mtx);
2910 } else
2911 BO_UNLOCK(bo);
2912 mtx_lock(&np->n_mtx);
2913 if (np->n_flag & NWRITEERR) {
2914 error = np->n_error;
2915 np->n_flag &= ~NWRITEERR;
2916 }
2917 if (commit && bo->bo_dirty.bv_cnt == 0 &&
2918 bo->bo_numoutput == 0 && np->n_directio_asyncwr == 0)
2919 np->n_flag &= ~NMODIFIED;
2920 mtx_unlock(&np->n_mtx);
2921done:
2922 if (bvec != NULL && bvec != bvec_on_stack)
2923 free(bvec, M_TEMP);
2924 if (error == 0 && commit != 0 && waitfor == MNT_WAIT &&
2925 (bo->bo_dirty.bv_cnt != 0 || bo->bo_numoutput != 0 ||
2926 np->n_directio_asyncwr != 0) && trycnt++ < 5) {
2927 /* try, try again... */
2928 passone = 1;
2929 wcred = NULL;
2930 bvec = NULL;
2931 bvecsize = 0;
2932printf("try%d\n", trycnt);
2933 goto again;
2934 }
2935 return (error);
2936}
2937
2938/*
2939 * NFS advisory byte-level locks.
2940 */
2941static int
2942nfs_advlock(struct vop_advlock_args *ap)
2943{
2944 struct vnode *vp = ap->a_vp;
2945 struct ucred *cred;
2946 struct nfsnode *np = VTONFS(ap->a_vp);
2947 struct proc *p = (struct proc *)ap->a_id;
2948 struct thread *td = curthread; /* XXX */
2949 struct vattr va;
2950 int ret, error = EOPNOTSUPP;
2951 u_quad_t size;
2952
2953 if (NFS_ISV4(vp) && (ap->a_flags & (F_POSIX | F_FLOCK)) != 0) {
2954 if (vp->v_type != VREG)
2955 return (EINVAL);
2956 if ((ap->a_flags & F_POSIX) != 0)
2957 cred = p->p_ucred;
2958 else
2959 cred = td->td_ucred;
2960 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
2961 if (vp->v_iflag & VI_DOOMED) {
2962 NFSVOPUNLOCK(vp, 0);
2963 return (EBADF);
2964 }
2965
2966 /*
2967 * If this is unlocking a write locked region, flush and
2968 * commit them before unlocking. This is required by
2969 * RFC3530 Sec. 9.3.2.
2970 */
2971 if (ap->a_op == F_UNLCK &&
2972 nfscl_checkwritelocked(vp, ap->a_fl, cred, td, ap->a_id,
2973 ap->a_flags))
2974 (void) ncl_flush(vp, MNT_WAIT, cred, td, 1, 0);
2975
2976 /*
2977 * Loop around doing the lock op, while a blocking lock
2978 * must wait for the lock op to succeed.
2979 */
2980 do {
2981 ret = nfsrpc_advlock(vp, np->n_size, ap->a_op,
2982 ap->a_fl, 0, cred, td, ap->a_id, ap->a_flags);
2983 if (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
2984 ap->a_op == F_SETLK) {
2985 NFSVOPUNLOCK(vp, 0);
2986 error = nfs_catnap(PZERO | PCATCH, ret,
2987 "ncladvl");
2988 if (error)
2989 return (EINTR);
2990 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
2991 if (vp->v_iflag & VI_DOOMED) {
2992 NFSVOPUNLOCK(vp, 0);
2993 return (EBADF);
2994 }
2995 }
2996 } while (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
2997 ap->a_op == F_SETLK);
2998 if (ret == NFSERR_DENIED) {
2999 NFSVOPUNLOCK(vp, 0);
3000 return (EAGAIN);
3001 } else if (ret == EINVAL || ret == EBADF || ret == EINTR) {
3002 NFSVOPUNLOCK(vp, 0);
3003 return (ret);
3004 } else if (ret != 0) {
3005 NFSVOPUNLOCK(vp, 0);
3006 return (EACCES);
3007 }
3008
3009 /*
3010 * Now, if we just got a lock, invalidate data in the buffer
3011 * cache, as required, so that the coherency conforms with
3012 * RFC3530 Sec. 9.3.2.
3013 */
3014 if (ap->a_op == F_SETLK) {
3015 if ((np->n_flag & NMODIFIED) == 0) {
3016 np->n_attrstamp = 0;
3017 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
3018 ret = VOP_GETATTR(vp, &va, cred);
3019 }
3020 if ((np->n_flag & NMODIFIED) || ret ||
3021 np->n_change != va.va_filerev) {
3022 (void) ncl_vinvalbuf(vp, V_SAVE, td, 1);
3023 np->n_attrstamp = 0;
3024 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
3025 ret = VOP_GETATTR(vp, &va, cred);
3026 if (!ret) {
3027 np->n_mtime = va.va_mtime;
3028 np->n_change = va.va_filerev;
3029 }
3030 }
3031 }
3032 NFSVOPUNLOCK(vp, 0);
3033 return (0);
3034 } else if (!NFS_ISV4(vp)) {
3035 error = NFSVOPLOCK(vp, LK_SHARED);
3036 if (error)
3037 return (error);
3038 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
3039 size = VTONFS(vp)->n_size;
3040 NFSVOPUNLOCK(vp, 0);
3041 error = lf_advlock(ap, &(vp->v_lockf), size);
3042 } else {
3043 if (nfs_advlock_p != NULL)
3044 error = nfs_advlock_p(ap);
3045 else {
3046 NFSVOPUNLOCK(vp, 0);
3047 error = ENOLCK;
3048 }
3049 }
3050 }
3051 return (error);
3052}
3053
3054/*
3055 * NFS advisory byte-level locks.
3056 */
3057static int
3058nfs_advlockasync(struct vop_advlockasync_args *ap)
3059{
3060 struct vnode *vp = ap->a_vp;
3061 u_quad_t size;
3062 int error;
3063
3064 if (NFS_ISV4(vp))
3065 return (EOPNOTSUPP);
3066 error = NFSVOPLOCK(vp, LK_SHARED);
3067 if (error)
3068 return (error);
3069 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
3070 size = VTONFS(vp)->n_size;
3071 NFSVOPUNLOCK(vp, 0);
3072 error = lf_advlockasync(ap, &(vp->v_lockf), size);
3073 } else {
3074 NFSVOPUNLOCK(vp, 0);
3075 error = EOPNOTSUPP;
3076 }
3077 return (error);
3078}
3079
3080/*
3081 * Print out the contents of an nfsnode.
3082 */
3083static int
3084nfs_print(struct vop_print_args *ap)
3085{
3086 struct vnode *vp = ap->a_vp;
3087 struct nfsnode *np = VTONFS(vp);
3088
3089 ncl_printf("\tfileid %ld fsid 0x%x",
3090 np->n_vattr.na_fileid, np->n_vattr.na_fsid);
3091 if (vp->v_type == VFIFO)
3092 fifo_printinfo(vp);
3093 printf("\n");
3094 return (0);
3095}
3096
3097/*
3098 * This is the "real" nfs::bwrite(struct buf*).
3099 * We set B_CACHE if this is a VMIO buffer.
3100 */
3101int
3102ncl_writebp(struct buf *bp, int force __unused, struct thread *td)
3103{
3104 int s;
3105 int oldflags = bp->b_flags;
3106#if 0
3107 int retv = 1;
3108 off_t off;
3109#endif
3110
3111 BUF_ASSERT_HELD(bp);
3112
3113 if (bp->b_flags & B_INVAL) {
3114 brelse(bp);
3115 return(0);
3116 }
3117
3118 bp->b_flags |= B_CACHE;
3119
3120 /*
3121 * Undirty the bp. We will redirty it later if the I/O fails.
3122 */
3123
3124 s = splbio();
3125 bundirty(bp);
3126 bp->b_flags &= ~B_DONE;
3127 bp->b_ioflags &= ~BIO_ERROR;
3128 bp->b_iocmd = BIO_WRITE;
3129
3130 bufobj_wref(bp->b_bufobj);
3131 curthread->td_ru.ru_oublock++;
3132 splx(s);
3133
3134 /*
3135 * Note: to avoid loopback deadlocks, we do not
3136 * assign b_runningbufspace.
3137 */
3138 vfs_busy_pages(bp, 1);
3139
3140 BUF_KERNPROC(bp);
3141 bp->b_iooffset = dbtob(bp->b_blkno);
3142 bstrategy(bp);
3143
3144 if( (oldflags & B_ASYNC) == 0) {
3145 int rtval = bufwait(bp);
3146
3147 if (oldflags & B_DELWRI) {
3148 s = splbio();
3149 reassignbuf(bp);
3150 splx(s);
3151 }
3152 brelse(bp);
3153 return (rtval);
3154 }
3155
3156 return (0);
3157}
3158
3159/*
3160 * nfs special file access vnode op.
3161 * Essentially just get vattr and then imitate iaccess() since the device is
3162 * local to the client.
3163 */
3164static int
3165nfsspec_access(struct vop_access_args *ap)
3166{
3167 struct vattr *vap;
3168 struct ucred *cred = ap->a_cred;
3169 struct vnode *vp = ap->a_vp;
3170 accmode_t accmode = ap->a_accmode;
3171 struct vattr vattr;
3172 int error;
3173
3174 /*
3175 * Disallow write attempts on filesystems mounted read-only;
3176 * unless the file is a socket, fifo, or a block or character
3177 * device resident on the filesystem.
3178 */
3179 if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3180 switch (vp->v_type) {
3181 case VREG:
3182 case VDIR:
3183 case VLNK:
3184 return (EROFS);
3185 default:
3186 break;
3187 }
3188 }
3189 vap = &vattr;
3190 error = VOP_GETATTR(vp, vap, cred);
3191 if (error)
3192 goto out;
3193 error = vaccess(vp->v_type, vap->va_mode, vap->va_uid, vap->va_gid,
3194 accmode, cred, NULL);
3195out:
3196 return error;
3197}
3198
3199/*
3200 * Read wrapper for fifos.
3201 */
3202static int
3203nfsfifo_read(struct vop_read_args *ap)
3204{
3205 struct nfsnode *np = VTONFS(ap->a_vp);
3206 int error;
3207
3208 /*
3209 * Set access flag.
3210 */
3211 mtx_lock(&np->n_mtx);
3212 np->n_flag |= NACC;
3213 getnanotime(&np->n_atim);
3214 mtx_unlock(&np->n_mtx);
3215 error = fifo_specops.vop_read(ap);
3216 return error;
3217}
3218
3219/*
3220 * Write wrapper for fifos.
3221 */
3222static int
3223nfsfifo_write(struct vop_write_args *ap)
3224{
3225 struct nfsnode *np = VTONFS(ap->a_vp);
3226
3227 /*
3228 * Set update flag.
3229 */
3230 mtx_lock(&np->n_mtx);
3231 np->n_flag |= NUPD;
3232 getnanotime(&np->n_mtim);
3233 mtx_unlock(&np->n_mtx);
3234 return(fifo_specops.vop_write(ap));
3235}
3236
3237/*
3238 * Close wrapper for fifos.
3239 *
3240 * Update the times on the nfsnode then do fifo close.
3241 */
3242static int
3243nfsfifo_close(struct vop_close_args *ap)
3244{
3245 struct vnode *vp = ap->a_vp;
3246 struct nfsnode *np = VTONFS(vp);
3247 struct vattr vattr;
3248 struct timespec ts;
3249
3250 mtx_lock(&np->n_mtx);
3251 if (np->n_flag & (NACC | NUPD)) {
3252 getnanotime(&ts);
3253 if (np->n_flag & NACC)
3254 np->n_atim = ts;
3255 if (np->n_flag & NUPD)
3256 np->n_mtim = ts;
3257 np->n_flag |= NCHG;
3258 if (vrefcnt(vp) == 1 &&
3259 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3260 VATTR_NULL(&vattr);
3261 if (np->n_flag & NACC)
3262 vattr.va_atime = np->n_atim;
3263 if (np->n_flag & NUPD)
3264 vattr.va_mtime = np->n_mtim;
3265 mtx_unlock(&np->n_mtx);
3266 (void)VOP_SETATTR(vp, &vattr, ap->a_cred);
3267 goto out;
3268 }
3269 }
3270 mtx_unlock(&np->n_mtx);
3271out:
3272 return (fifo_specops.vop_close(ap));
3273}
3274
3275/*
3276 * Just call ncl_writebp() with the force argument set to 1.
3277 *
3278 * NOTE: B_DONE may or may not be set in a_bp on call.
3279 */
3280static int
3281nfs_bwrite(struct buf *bp)
3282{
3283
3284 return (ncl_writebp(bp, 1, curthread));
3285}
3286
3287struct buf_ops buf_ops_newnfs = {
3288 .bop_name = "buf_ops_nfs",
3289 .bop_write = nfs_bwrite,
3290 .bop_strategy = bufstrategy,
3291 .bop_sync = bufsync,
3292 .bop_bdflush = bufbdflush,
3293};
3294
3295/*
3296 * Cloned from vop_stdlock(), and then the ugly hack added.
3297 */
3298static int
3299nfs_lock1(struct vop_lock1_args *ap)
3300{
3301 struct vnode *vp = ap->a_vp;
3302 int error = 0;
3303
3304 /*
3305 * Since vfs_hash_get() calls vget() and it will no longer work
3306 * for FreeBSD8 with flags == 0, I can only think of this horrible
3307 * hack to work around it. I call vfs_hash_get() with LK_EXCLOTHER
3308 * and then handle it here. All I want for this case is a v_usecount
3309 * on the vnode to use for recovery, while another thread might
3310 * hold a lock on the vnode. I have the other threads blocked, so
3311 * there isn't any race problem.
3312 */
3313 if ((ap->a_flags & LK_TYPE_MASK) == LK_EXCLOTHER) {
3314 if ((ap->a_flags & LK_INTERLOCK) == 0)
3315 panic("ncllock1");
3316 if ((vp->v_iflag & VI_DOOMED))
3317 error = ENOENT;
3318 VI_UNLOCK(vp);
3319 return (error);
3320 }
3321 return (_lockmgr_args(vp->v_vnlock, ap->a_flags, VI_MTX(vp),
3322 LK_WMESG_DEFAULT, LK_PRIO_DEFAULT, LK_TIMO_DEFAULT, ap->a_file,
3323 ap->a_line));
3324}
3325
3326static int
3327nfs_getacl(struct vop_getacl_args *ap)
3328{
3329 int error;
3330
3331 if (ap->a_type != ACL_TYPE_NFS4)
3332 return (EOPNOTSUPP);
3333 error = nfsrpc_getacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3334 NULL);
3335 if (error > NFSERR_STALE) {
3336 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3337 error = EPERM;
3338 }
3339 return (error);
3340}
3341
3342static int
3343nfs_setacl(struct vop_setacl_args *ap)
3344{
3345 int error;
3346
3347 if (ap->a_type != ACL_TYPE_NFS4)
3348 return (EOPNOTSUPP);
3349 error = nfsrpc_setacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3350 NULL);
3351 if (error > NFSERR_STALE) {
3352 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3353 error = EPERM;
3354 }
3355 return (error);
3356}
3357
3358/*
3359 * Return POSIX pathconf information applicable to nfs filesystems.
3360 */
3361static int
3362nfs_pathconf(struct vop_pathconf_args *ap)
3363{
3364 struct nfsv3_pathconf pc;
3365 struct nfsvattr nfsva;
3366 struct vnode *vp = ap->a_vp;
3367 struct thread *td = curthread;
3368 int attrflag, error;
3369
3370 if (NFS_ISV4(vp) || (NFS_ISV3(vp) && (ap->a_name == _PC_LINK_MAX ||
3371 ap->a_name == _PC_NAME_MAX || ap->a_name == _PC_CHOWN_RESTRICTED ||
3372 ap->a_name == _PC_NO_TRUNC))) {
3373 /*
3374 * Since only the above 4 a_names are returned by the NFSv3
3375 * Pathconf RPC, there is no point in doing it for others.
3376 */
3377 error = nfsrpc_pathconf(vp, &pc, td->td_ucred, td, &nfsva,
3378 &attrflag, NULL);
3379 if (attrflag != 0)
3380 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
3381 1);
3382 if (error != 0)
3383 return (error);
3384 } else {
3385 /*
3386 * For NFSv2 (or NFSv3 when not one of the above 4 a_names),
3387 * just fake them.
3388 */
3389 pc.pc_linkmax = LINK_MAX;
3390 pc.pc_namemax = NFS_MAXNAMLEN;
3391 pc.pc_notrunc = 1;
3392 pc.pc_chownrestricted = 1;
3393 pc.pc_caseinsensitive = 0;
3394 pc.pc_casepreserving = 1;
3395 error = 0;
3396 }
3397 switch (ap->a_name) {
3398 case _PC_LINK_MAX:
3399 *ap->a_retval = pc.pc_linkmax;
3400 break;
3401 case _PC_NAME_MAX:
3402 *ap->a_retval = pc.pc_namemax;
3403 break;
3404 case _PC_PATH_MAX:
3405 *ap->a_retval = PATH_MAX;
3406 break;
3407 case _PC_PIPE_BUF:
3408 *ap->a_retval = PIPE_BUF;
3409 break;
3410 case _PC_CHOWN_RESTRICTED:
3411 *ap->a_retval = pc.pc_chownrestricted;
3412 break;
3413 case _PC_NO_TRUNC:
3414 *ap->a_retval = pc.pc_notrunc;
3415 break;
3416 case _PC_ACL_EXTENDED:
3417 *ap->a_retval = 0;
3418 break;
3419 case _PC_ACL_NFS4:
3420 if (NFS_ISV4(vp) && nfsrv_useacl != 0 && attrflag != 0 &&
3421 NFSISSET_ATTRBIT(&nfsva.na_suppattr, NFSATTRBIT_ACL))
3422 *ap->a_retval = 1;
3423 else
3424 *ap->a_retval = 0;
3425 break;
3426 case _PC_ACL_PATH_MAX:
3427 if (NFS_ISV4(vp))
3428 *ap->a_retval = ACL_MAX_ENTRIES;
3429 else
3430 *ap->a_retval = 3;
3431 break;
3432 case _PC_MAC_PRESENT:
3433 *ap->a_retval = 0;
3434 break;
3435 case _PC_ASYNC_IO:
3436 /* _PC_ASYNC_IO should have been handled by upper layers. */
3437 KASSERT(0, ("_PC_ASYNC_IO should not get here"));
3438 error = EINVAL;
3439 break;
3440 case _PC_PRIO_IO:
3441 *ap->a_retval = 0;
3442 break;
3443 case _PC_SYNC_IO:
3444 *ap->a_retval = 0;
3445 break;
3446 case _PC_ALLOC_SIZE_MIN:
3447 *ap->a_retval = vp->v_mount->mnt_stat.f_bsize;
3448 break;
3449 case _PC_FILESIZEBITS:
3450 if (NFS_ISV34(vp))
3451 *ap->a_retval = 64;
3452 else
3453 *ap->a_retval = 32;
3454 break;
3455 case _PC_REC_INCR_XFER_SIZE:
3456 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
3457 break;
3458 case _PC_REC_MAX_XFER_SIZE:
3459 *ap->a_retval = -1; /* means ``unlimited'' */
3460 break;
3461 case _PC_REC_MIN_XFER_SIZE:
3462 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
3463 break;
3464 case _PC_REC_XFER_ALIGN:
3465 *ap->a_retval = PAGE_SIZE;
3466 break;
3467 case _PC_SYMLINK_MAX:
3468 *ap->a_retval = NFS_MAXPATHLEN;
3469 break;
3470
3471 default:
3472 error = EINVAL;
3473 break;
3474 }
3475 return (error);
3476}
3477
| 1274 }
1275 *vpp = newvp;
1276 return (0);
1277}
1278
1279/*
1280 * nfs read call.
1281 * Just call ncl_bioread() to do the work.
1282 */
1283static int
1284nfs_read(struct vop_read_args *ap)
1285{
1286 struct vnode *vp = ap->a_vp;
1287
1288 switch (vp->v_type) {
1289 case VREG:
1290 return (ncl_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred));
1291 case VDIR:
1292 return (EISDIR);
1293 default:
1294 return (EOPNOTSUPP);
1295 }
1296}
1297
1298/*
1299 * nfs readlink call
1300 */
1301static int
1302nfs_readlink(struct vop_readlink_args *ap)
1303{
1304 struct vnode *vp = ap->a_vp;
1305
1306 if (vp->v_type != VLNK)
1307 return (EINVAL);
1308 return (ncl_bioread(vp, ap->a_uio, 0, ap->a_cred));
1309}
1310
1311/*
1312 * Do a readlink rpc.
1313 * Called by ncl_doio() from below the buffer cache.
1314 */
1315int
1316ncl_readlinkrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1317{
1318 int error, ret, attrflag;
1319 struct nfsvattr nfsva;
1320
1321 error = nfsrpc_readlink(vp, uiop, cred, uiop->uio_td, &nfsva,
1322 &attrflag, NULL);
1323 if (attrflag) {
1324 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1325 if (ret && !error)
1326 error = ret;
1327 }
1328 if (error && NFS_ISV4(vp))
1329 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1330 return (error);
1331}
1332
1333/*
1334 * nfs read rpc call
1335 * Ditto above
1336 */
1337int
1338ncl_readrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1339{
1340 int error, ret, attrflag;
1341 struct nfsvattr nfsva;
1342
1343 error = nfsrpc_read(vp, uiop, cred, uiop->uio_td, &nfsva, &attrflag,
1344 NULL);
1345 if (attrflag) {
1346 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1347 if (ret && !error)
1348 error = ret;
1349 }
1350 if (error && NFS_ISV4(vp))
1351 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1352 return (error);
1353}
1354
1355/*
1356 * nfs write call
1357 */
1358int
1359ncl_writerpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
1360 int *iomode, int *must_commit, int called_from_strategy)
1361{
1362 struct nfsvattr nfsva;
1363 int error = 0, attrflag, ret;
1364
1365 error = nfsrpc_write(vp, uiop, iomode, must_commit, cred,
1366 uiop->uio_td, &nfsva, &attrflag, NULL, called_from_strategy);
1367 if (attrflag) {
1368 if (VTONFS(vp)->n_flag & ND_NFSV4)
1369 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 1,
1370 1);
1371 else
1372 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
1373 1);
1374 if (ret && !error)
1375 error = ret;
1376 }
1377 if (vp->v_mount->mnt_kern_flag & MNTK_ASYNC)
1378 *iomode = NFSWRITE_FILESYNC;
1379 if (error && NFS_ISV4(vp))
1380 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1381 return (error);
1382}
1383
1384/*
1385 * nfs mknod rpc
1386 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1387 * mode set to specify the file type and the size field for rdev.
1388 */
1389static int
1390nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1391 struct vattr *vap)
1392{
1393 struct nfsvattr nfsva, dnfsva;
1394 struct vnode *newvp = NULL;
1395 struct nfsnode *np = NULL, *dnp;
1396 struct nfsfh *nfhp;
1397 struct vattr vattr;
1398 int error = 0, attrflag, dattrflag;
1399 u_int32_t rdev;
1400
1401 if (vap->va_type == VCHR || vap->va_type == VBLK)
1402 rdev = vap->va_rdev;
1403 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1404 rdev = 0xffffffff;
1405 else
1406 return (EOPNOTSUPP);
1407 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1408 return (error);
1409 error = nfsrpc_mknod(dvp, cnp->cn_nameptr, cnp->cn_namelen, vap,
1410 rdev, vap->va_type, cnp->cn_cred, cnp->cn_thread, &dnfsva,
1411 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
1412 if (!error) {
1413 if (!nfhp)
1414 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
1415 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread,
1416 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1417 NULL);
1418 if (nfhp)
1419 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
1420 cnp->cn_thread, &np, NULL, LK_EXCLUSIVE);
1421 }
1422 if (dattrflag)
1423 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1424 if (!error) {
1425 newvp = NFSTOV(np);
1426 if (attrflag != 0) {
1427 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1428 0, 1);
1429 if (error != 0)
1430 vput(newvp);
1431 }
1432 }
1433 if (!error) {
1434 if ((cnp->cn_flags & MAKEENTRY))
1435 cache_enter(dvp, newvp, cnp);
1436 *vpp = newvp;
1437 } else if (NFS_ISV4(dvp)) {
1438 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1439 vap->va_gid);
1440 }
1441 dnp = VTONFS(dvp);
1442 mtx_lock(&dnp->n_mtx);
1443 dnp->n_flag |= NMODIFIED;
1444 if (!dattrflag) {
1445 dnp->n_attrstamp = 0;
1446 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1447 }
1448 mtx_unlock(&dnp->n_mtx);
1449 return (error);
1450}
1451
1452/*
1453 * nfs mknod vop
1454 * just call nfs_mknodrpc() to do the work.
1455 */
1456/* ARGSUSED */
1457static int
1458nfs_mknod(struct vop_mknod_args *ap)
1459{
1460 return (nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap));
1461}
1462
1463static struct mtx nfs_cverf_mtx;
1464MTX_SYSINIT(nfs_cverf_mtx, &nfs_cverf_mtx, "NFS create verifier mutex",
1465 MTX_DEF);
1466
1467static nfsquad_t
1468nfs_get_cverf(void)
1469{
1470 static nfsquad_t cverf;
1471 nfsquad_t ret;
1472 static int cverf_initialized = 0;
1473
1474 mtx_lock(&nfs_cverf_mtx);
1475 if (cverf_initialized == 0) {
1476 cverf.lval[0] = arc4random();
1477 cverf.lval[1] = arc4random();
1478 cverf_initialized = 1;
1479 } else
1480 cverf.qval++;
1481 ret = cverf;
1482 mtx_unlock(&nfs_cverf_mtx);
1483
1484 return (ret);
1485}
1486
1487/*
1488 * nfs file create call
1489 */
1490static int
1491nfs_create(struct vop_create_args *ap)
1492{
1493 struct vnode *dvp = ap->a_dvp;
1494 struct vattr *vap = ap->a_vap;
1495 struct componentname *cnp = ap->a_cnp;
1496 struct nfsnode *np = NULL, *dnp;
1497 struct vnode *newvp = NULL;
1498 struct nfsmount *nmp;
1499 struct nfsvattr dnfsva, nfsva;
1500 struct nfsfh *nfhp;
1501 nfsquad_t cverf;
1502 int error = 0, attrflag, dattrflag, fmode = 0;
1503 struct vattr vattr;
1504
1505 /*
1506 * Oops, not for me..
1507 */
1508 if (vap->va_type == VSOCK)
1509 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1510
1511 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1512 return (error);
1513 if (vap->va_vaflags & VA_EXCLUSIVE)
1514 fmode |= O_EXCL;
1515 dnp = VTONFS(dvp);
1516 nmp = VFSTONFS(vnode_mount(dvp));
1517again:
1518 /* For NFSv4, wait until any remove is done. */
1519 mtx_lock(&dnp->n_mtx);
1520 while (NFSHASNFSV4(nmp) && (dnp->n_flag & NREMOVEINPROG)) {
1521 dnp->n_flag |= NREMOVEWANT;
1522 (void) msleep((caddr_t)dnp, &dnp->n_mtx, PZERO, "nfscrt", 0);
1523 }
1524 mtx_unlock(&dnp->n_mtx);
1525
1526 cverf = nfs_get_cverf();
1527 error = nfsrpc_create(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1528 vap, cverf, fmode, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva,
1529 &nfhp, &attrflag, &dattrflag, NULL);
1530 if (!error) {
1531 if (nfhp == NULL)
1532 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
1533 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread,
1534 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1535 NULL);
1536 if (nfhp != NULL)
1537 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
1538 cnp->cn_thread, &np, NULL, LK_EXCLUSIVE);
1539 }
1540 if (dattrflag)
1541 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1542 if (!error) {
1543 newvp = NFSTOV(np);
1544 if (attrflag)
1545 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1546 0, 1);
1547 }
1548 if (error) {
1549 if (newvp != NULL) {
1550 vput(newvp);
1551 newvp = NULL;
1552 }
1553 if (NFS_ISV34(dvp) && (fmode & O_EXCL) &&
1554 error == NFSERR_NOTSUPP) {
1555 fmode &= ~O_EXCL;
1556 goto again;
1557 }
1558 } else if (NFS_ISV34(dvp) && (fmode & O_EXCL)) {
1559 if (nfscl_checksattr(vap, &nfsva)) {
1560 /*
1561 * We are normally called with only a partially
1562 * initialized VAP. Since the NFSv3 spec says that
1563 * the server may use the file attributes to
1564 * store the verifier, the spec requires us to do a
1565 * SETATTR RPC. FreeBSD servers store the verifier in
1566 * atime, but we can't really assume that all servers
1567 * will so we ensure that our SETATTR sets both atime
1568 * and mtime.
1569 */
1570 if (vap->va_mtime.tv_sec == VNOVAL)
1571 vfs_timestamp(&vap->va_mtime);
1572 if (vap->va_atime.tv_sec == VNOVAL)
1573 vap->va_atime = vap->va_mtime;
1574 error = nfsrpc_setattr(newvp, vap, NULL, cnp->cn_cred,
1575 cnp->cn_thread, &nfsva, &attrflag, NULL);
1576 if (error && (vap->va_uid != (uid_t)VNOVAL ||
1577 vap->va_gid != (gid_t)VNOVAL)) {
1578 /* try again without setting uid/gid */
1579 vap->va_uid = (uid_t)VNOVAL;
1580 vap->va_gid = (uid_t)VNOVAL;
1581 error = nfsrpc_setattr(newvp, vap, NULL,
1582 cnp->cn_cred, cnp->cn_thread, &nfsva,
1583 &attrflag, NULL);
1584 }
1585 if (attrflag)
1586 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
1587 NULL, 0, 1);
1588 if (error != 0)
1589 vput(newvp);
1590 }
1591 }
1592 if (!error) {
1593 if (cnp->cn_flags & MAKEENTRY)
1594 cache_enter(dvp, newvp, cnp);
1595 *ap->a_vpp = newvp;
1596 } else if (NFS_ISV4(dvp)) {
1597 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1598 vap->va_gid);
1599 }
1600 mtx_lock(&dnp->n_mtx);
1601 dnp->n_flag |= NMODIFIED;
1602 if (!dattrflag) {
1603 dnp->n_attrstamp = 0;
1604 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1605 }
1606 mtx_unlock(&dnp->n_mtx);
1607 return (error);
1608}
1609
1610/*
1611 * nfs file remove call
1612 * To try and make nfs semantics closer to ufs semantics, a file that has
1613 * other processes using the vnode is renamed instead of removed and then
1614 * removed later on the last close.
1615 * - If v_usecount > 1
1616 * If a rename is not already in the works
1617 * call nfs_sillyrename() to set it up
1618 * else
1619 * do the remove rpc
1620 */
1621static int
1622nfs_remove(struct vop_remove_args *ap)
1623{
1624 struct vnode *vp = ap->a_vp;
1625 struct vnode *dvp = ap->a_dvp;
1626 struct componentname *cnp = ap->a_cnp;
1627 struct nfsnode *np = VTONFS(vp);
1628 int error = 0;
1629 struct vattr vattr;
1630
1631 KASSERT((cnp->cn_flags & HASBUF) != 0, ("nfs_remove: no name"));
1632 KASSERT(vrefcnt(vp) > 0, ("nfs_remove: bad v_usecount"));
1633 if (vp->v_type == VDIR)
1634 error = EPERM;
1635 else if (vrefcnt(vp) == 1 || (np->n_sillyrename &&
1636 VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 &&
1637 vattr.va_nlink > 1)) {
1638 /*
1639 * Purge the name cache so that the chance of a lookup for
1640 * the name succeeding while the remove is in progress is
1641 * minimized. Without node locking it can still happen, such
1642 * that an I/O op returns ESTALE, but since you get this if
1643 * another host removes the file..
1644 */
1645 cache_purge(vp);
1646 /*
1647 * throw away biocache buffers, mainly to avoid
1648 * unnecessary delayed writes later.
1649 */
1650 error = ncl_vinvalbuf(vp, 0, cnp->cn_thread, 1);
1651 /* Do the rpc */
1652 if (error != EINTR && error != EIO)
1653 error = nfs_removerpc(dvp, vp, cnp->cn_nameptr,
1654 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread);
1655 /*
1656 * Kludge City: If the first reply to the remove rpc is lost..
1657 * the reply to the retransmitted request will be ENOENT
1658 * since the file was in fact removed
1659 * Therefore, we cheat and return success.
1660 */
1661 if (error == ENOENT)
1662 error = 0;
1663 } else if (!np->n_sillyrename)
1664 error = nfs_sillyrename(dvp, vp, cnp);
1665 mtx_lock(&np->n_mtx);
1666 np->n_attrstamp = 0;
1667 mtx_unlock(&np->n_mtx);
1668 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
1669 return (error);
1670}
1671
1672/*
1673 * nfs file remove rpc called from nfs_inactive
1674 */
1675int
1676ncl_removeit(struct sillyrename *sp, struct vnode *vp)
1677{
1678 /*
1679 * Make sure that the directory vnode is still valid.
1680 * XXX we should lock sp->s_dvp here.
1681 */
1682 if (sp->s_dvp->v_type == VBAD)
1683 return (0);
1684 return (nfs_removerpc(sp->s_dvp, vp, sp->s_name, sp->s_namlen,
1685 sp->s_cred, NULL));
1686}
1687
1688/*
1689 * Nfs remove rpc, called from nfs_remove() and ncl_removeit().
1690 */
1691static int
1692nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
1693 int namelen, struct ucred *cred, struct thread *td)
1694{
1695 struct nfsvattr dnfsva;
1696 struct nfsnode *dnp = VTONFS(dvp);
1697 int error = 0, dattrflag;
1698
1699 mtx_lock(&dnp->n_mtx);
1700 dnp->n_flag |= NREMOVEINPROG;
1701 mtx_unlock(&dnp->n_mtx);
1702 error = nfsrpc_remove(dvp, name, namelen, vp, cred, td, &dnfsva,
1703 &dattrflag, NULL);
1704 mtx_lock(&dnp->n_mtx);
1705 if ((dnp->n_flag & NREMOVEWANT)) {
1706 dnp->n_flag &= ~(NREMOVEWANT | NREMOVEINPROG);
1707 mtx_unlock(&dnp->n_mtx);
1708 wakeup((caddr_t)dnp);
1709 } else {
1710 dnp->n_flag &= ~NREMOVEINPROG;
1711 mtx_unlock(&dnp->n_mtx);
1712 }
1713 if (dattrflag)
1714 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1715 mtx_lock(&dnp->n_mtx);
1716 dnp->n_flag |= NMODIFIED;
1717 if (!dattrflag) {
1718 dnp->n_attrstamp = 0;
1719 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1720 }
1721 mtx_unlock(&dnp->n_mtx);
1722 if (error && NFS_ISV4(dvp))
1723 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1724 return (error);
1725}
1726
1727/*
1728 * nfs file rename call
1729 */
1730static int
1731nfs_rename(struct vop_rename_args *ap)
1732{
1733 struct vnode *fvp = ap->a_fvp;
1734 struct vnode *tvp = ap->a_tvp;
1735 struct vnode *fdvp = ap->a_fdvp;
1736 struct vnode *tdvp = ap->a_tdvp;
1737 struct componentname *tcnp = ap->a_tcnp;
1738 struct componentname *fcnp = ap->a_fcnp;
1739 struct nfsnode *fnp = VTONFS(ap->a_fvp);
1740 struct nfsnode *tdnp = VTONFS(ap->a_tdvp);
1741 struct nfsv4node *newv4 = NULL;
1742 int error;
1743
1744 KASSERT((tcnp->cn_flags & HASBUF) != 0 &&
1745 (fcnp->cn_flags & HASBUF) != 0, ("nfs_rename: no name"));
1746 /* Check for cross-device rename */
1747 if ((fvp->v_mount != tdvp->v_mount) ||
1748 (tvp && (fvp->v_mount != tvp->v_mount))) {
1749 error = EXDEV;
1750 goto out;
1751 }
1752
1753 if (fvp == tvp) {
1754 ncl_printf("nfs_rename: fvp == tvp (can't happen)\n");
1755 error = 0;
1756 goto out;
1757 }
1758 if ((error = NFSVOPLOCK(fvp, LK_EXCLUSIVE)) != 0)
1759 goto out;
1760
1761 /*
1762 * We have to flush B_DELWRI data prior to renaming
1763 * the file. If we don't, the delayed-write buffers
1764 * can be flushed out later after the file has gone stale
1765 * under NFSV3. NFSV2 does not have this problem because
1766 * ( as far as I can tell ) it flushes dirty buffers more
1767 * often.
1768 *
1769 * Skip the rename operation if the fsync fails, this can happen
1770 * due to the server's volume being full, when we pushed out data
1771 * that was written back to our cache earlier. Not checking for
1772 * this condition can result in potential (silent) data loss.
1773 */
1774 error = VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_thread);
1775 NFSVOPUNLOCK(fvp, 0);
1776 if (!error && tvp)
1777 error = VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_thread);
1778 if (error)
1779 goto out;
1780
1781 /*
1782 * If the tvp exists and is in use, sillyrename it before doing the
1783 * rename of the new file over it.
1784 * XXX Can't sillyrename a directory.
1785 */
1786 if (tvp && vrefcnt(tvp) > 1 && !VTONFS(tvp)->n_sillyrename &&
1787 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1788 vput(tvp);
1789 tvp = NULL;
1790 }
1791
1792 error = nfs_renamerpc(fdvp, fvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1793 tdvp, tvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1794 tcnp->cn_thread);
1795
1796 if (error == 0 && NFS_ISV4(tdvp)) {
1797 /*
1798 * For NFSv4, check to see if it is the same name and
1799 * replace the name, if it is different.
1800 */
1801 MALLOC(newv4, struct nfsv4node *,
1802 sizeof (struct nfsv4node) +
1803 tdnp->n_fhp->nfh_len + tcnp->cn_namelen - 1,
1804 M_NFSV4NODE, M_WAITOK);
1805 mtx_lock(&tdnp->n_mtx);
1806 mtx_lock(&fnp->n_mtx);
1807 if (fnp->n_v4 != NULL && fvp->v_type == VREG &&
1808 (fnp->n_v4->n4_namelen != tcnp->cn_namelen ||
1809 NFSBCMP(tcnp->cn_nameptr, NFS4NODENAME(fnp->n_v4),
1810 tcnp->cn_namelen) ||
1811 tdnp->n_fhp->nfh_len != fnp->n_v4->n4_fhlen ||
1812 NFSBCMP(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1813 tdnp->n_fhp->nfh_len))) {
1814#ifdef notdef
1815{ char nnn[100]; int nnnl;
1816nnnl = (tcnp->cn_namelen < 100) ? tcnp->cn_namelen : 99;
1817bcopy(tcnp->cn_nameptr, nnn, nnnl);
1818nnn[nnnl] = '\0';
1819printf("ren replace=%s\n",nnn);
1820}
1821#endif
1822 FREE((caddr_t)fnp->n_v4, M_NFSV4NODE);
1823 fnp->n_v4 = newv4;
1824 newv4 = NULL;
1825 fnp->n_v4->n4_fhlen = tdnp->n_fhp->nfh_len;
1826 fnp->n_v4->n4_namelen = tcnp->cn_namelen;
1827 NFSBCOPY(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1828 tdnp->n_fhp->nfh_len);
1829 NFSBCOPY(tcnp->cn_nameptr,
1830 NFS4NODENAME(fnp->n_v4), tcnp->cn_namelen);
1831 }
1832 mtx_unlock(&tdnp->n_mtx);
1833 mtx_unlock(&fnp->n_mtx);
1834 if (newv4 != NULL)
1835 FREE((caddr_t)newv4, M_NFSV4NODE);
1836 }
1837
1838 if (fvp->v_type == VDIR) {
1839 if (tvp != NULL && tvp->v_type == VDIR)
1840 cache_purge(tdvp);
1841 cache_purge(fdvp);
1842 }
1843
1844out:
1845 if (tdvp == tvp)
1846 vrele(tdvp);
1847 else
1848 vput(tdvp);
1849 if (tvp)
1850 vput(tvp);
1851 vrele(fdvp);
1852 vrele(fvp);
1853 /*
1854 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1855 */
1856 if (error == ENOENT)
1857 error = 0;
1858 return (error);
1859}
1860
1861/*
1862 * nfs file rename rpc called from nfs_remove() above
1863 */
1864static int
1865nfs_renameit(struct vnode *sdvp, struct vnode *svp, struct componentname *scnp,
1866 struct sillyrename *sp)
1867{
1868
1869 return (nfs_renamerpc(sdvp, svp, scnp->cn_nameptr, scnp->cn_namelen,
1870 sdvp, NULL, sp->s_name, sp->s_namlen, scnp->cn_cred,
1871 scnp->cn_thread));
1872}
1873
1874/*
1875 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1876 */
1877static int
1878nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, char *fnameptr,
1879 int fnamelen, struct vnode *tdvp, struct vnode *tvp, char *tnameptr,
1880 int tnamelen, struct ucred *cred, struct thread *td)
1881{
1882 struct nfsvattr fnfsva, tnfsva;
1883 struct nfsnode *fdnp = VTONFS(fdvp);
1884 struct nfsnode *tdnp = VTONFS(tdvp);
1885 int error = 0, fattrflag, tattrflag;
1886
1887 error = nfsrpc_rename(fdvp, fvp, fnameptr, fnamelen, tdvp, tvp,
1888 tnameptr, tnamelen, cred, td, &fnfsva, &tnfsva, &fattrflag,
1889 &tattrflag, NULL, NULL);
1890 mtx_lock(&fdnp->n_mtx);
1891 fdnp->n_flag |= NMODIFIED;
1892 if (fattrflag != 0) {
1893 mtx_unlock(&fdnp->n_mtx);
1894 (void) nfscl_loadattrcache(&fdvp, &fnfsva, NULL, NULL, 0, 1);
1895 } else {
1896 fdnp->n_attrstamp = 0;
1897 mtx_unlock(&fdnp->n_mtx);
1898 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(fdvp);
1899 }
1900 mtx_lock(&tdnp->n_mtx);
1901 tdnp->n_flag |= NMODIFIED;
1902 if (tattrflag != 0) {
1903 mtx_unlock(&tdnp->n_mtx);
1904 (void) nfscl_loadattrcache(&tdvp, &tnfsva, NULL, NULL, 0, 1);
1905 } else {
1906 tdnp->n_attrstamp = 0;
1907 mtx_unlock(&tdnp->n_mtx);
1908 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp);
1909 }
1910 if (error && NFS_ISV4(fdvp))
1911 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1912 return (error);
1913}
1914
1915/*
1916 * nfs hard link create call
1917 */
1918static int
1919nfs_link(struct vop_link_args *ap)
1920{
1921 struct vnode *vp = ap->a_vp;
1922 struct vnode *tdvp = ap->a_tdvp;
1923 struct componentname *cnp = ap->a_cnp;
1924 struct nfsnode *np, *tdnp;
1925 struct nfsvattr nfsva, dnfsva;
1926 int error = 0, attrflag, dattrflag;
1927
1928 if (vp->v_mount != tdvp->v_mount) {
1929 return (EXDEV);
1930 }
1931
1932 /*
1933 * Push all writes to the server, so that the attribute cache
1934 * doesn't get "out of sync" with the server.
1935 * XXX There should be a better way!
1936 */
1937 VOP_FSYNC(vp, MNT_WAIT, cnp->cn_thread);
1938
1939 error = nfsrpc_link(tdvp, vp, cnp->cn_nameptr, cnp->cn_namelen,
1940 cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &attrflag,
1941 &dattrflag, NULL);
1942 tdnp = VTONFS(tdvp);
1943 mtx_lock(&tdnp->n_mtx);
1944 tdnp->n_flag |= NMODIFIED;
1945 if (dattrflag != 0) {
1946 mtx_unlock(&tdnp->n_mtx);
1947 (void) nfscl_loadattrcache(&tdvp, &dnfsva, NULL, NULL, 0, 1);
1948 } else {
1949 tdnp->n_attrstamp = 0;
1950 mtx_unlock(&tdnp->n_mtx);
1951 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp);
1952 }
1953 if (attrflag)
1954 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1955 else {
1956 np = VTONFS(vp);
1957 mtx_lock(&np->n_mtx);
1958 np->n_attrstamp = 0;
1959 mtx_unlock(&np->n_mtx);
1960 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
1961 }
1962 /*
1963 * If negative lookup caching is enabled, I might as well
1964 * add an entry for this node. Not necessary for correctness,
1965 * but if negative caching is enabled, then the system
1966 * must care about lookup caching hit rate, so...
1967 */
1968 if (VFSTONFS(vp->v_mount)->nm_negnametimeo != 0 &&
1969 (cnp->cn_flags & MAKEENTRY))
1970 cache_enter(tdvp, vp, cnp);
1971 if (error && NFS_ISV4(vp))
1972 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
1973 (gid_t)0);
1974 return (error);
1975}
1976
1977/*
1978 * nfs symbolic link create call
1979 */
1980static int
1981nfs_symlink(struct vop_symlink_args *ap)
1982{
1983 struct vnode *dvp = ap->a_dvp;
1984 struct vattr *vap = ap->a_vap;
1985 struct componentname *cnp = ap->a_cnp;
1986 struct nfsvattr nfsva, dnfsva;
1987 struct nfsfh *nfhp;
1988 struct nfsnode *np = NULL, *dnp;
1989 struct vnode *newvp = NULL;
1990 int error = 0, attrflag, dattrflag, ret;
1991
1992 vap->va_type = VLNK;
1993 error = nfsrpc_symlink(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1994 ap->a_target, vap, cnp->cn_cred, cnp->cn_thread, &dnfsva,
1995 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
1996 if (nfhp) {
1997 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
1998 &np, NULL, LK_EXCLUSIVE);
1999 if (!ret)
2000 newvp = NFSTOV(np);
2001 else if (!error)
2002 error = ret;
2003 }
2004 if (newvp != NULL) {
2005 if (attrflag)
2006 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
2007 0, 1);
2008 } else if (!error) {
2009 /*
2010 * If we do not have an error and we could not extract the
2011 * newvp from the response due to the request being NFSv2, we
2012 * have to do a lookup in order to obtain a newvp to return.
2013 */
2014 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2015 cnp->cn_cred, cnp->cn_thread, &np);
2016 if (!error)
2017 newvp = NFSTOV(np);
2018 }
2019 if (error) {
2020 if (newvp)
2021 vput(newvp);
2022 if (NFS_ISV4(dvp))
2023 error = nfscl_maperr(cnp->cn_thread, error,
2024 vap->va_uid, vap->va_gid);
2025 } else {
2026 /*
2027 * If negative lookup caching is enabled, I might as well
2028 * add an entry for this node. Not necessary for correctness,
2029 * but if negative caching is enabled, then the system
2030 * must care about lookup caching hit rate, so...
2031 */
2032 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 &&
2033 (cnp->cn_flags & MAKEENTRY))
2034 cache_enter(dvp, newvp, cnp);
2035 *ap->a_vpp = newvp;
2036 }
2037
2038 dnp = VTONFS(dvp);
2039 mtx_lock(&dnp->n_mtx);
2040 dnp->n_flag |= NMODIFIED;
2041 if (dattrflag != 0) {
2042 mtx_unlock(&dnp->n_mtx);
2043 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2044 } else {
2045 dnp->n_attrstamp = 0;
2046 mtx_unlock(&dnp->n_mtx);
2047 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2048 }
2049 return (error);
2050}
2051
2052/*
2053 * nfs make dir call
2054 */
2055static int
2056nfs_mkdir(struct vop_mkdir_args *ap)
2057{
2058 struct vnode *dvp = ap->a_dvp;
2059 struct vattr *vap = ap->a_vap;
2060 struct componentname *cnp = ap->a_cnp;
2061 struct nfsnode *np = NULL, *dnp;
2062 struct vnode *newvp = NULL;
2063 struct vattr vattr;
2064 struct nfsfh *nfhp;
2065 struct nfsvattr nfsva, dnfsva;
2066 int error = 0, attrflag, dattrflag, ret;
2067
2068 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)) != 0)
2069 return (error);
2070 vap->va_type = VDIR;
2071 error = nfsrpc_mkdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2072 vap, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &nfhp,
2073 &attrflag, &dattrflag, NULL);
2074 dnp = VTONFS(dvp);
2075 mtx_lock(&dnp->n_mtx);
2076 dnp->n_flag |= NMODIFIED;
2077 if (dattrflag != 0) {
2078 mtx_unlock(&dnp->n_mtx);
2079 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2080 } else {
2081 dnp->n_attrstamp = 0;
2082 mtx_unlock(&dnp->n_mtx);
2083 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2084 }
2085 if (nfhp) {
2086 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
2087 &np, NULL, LK_EXCLUSIVE);
2088 if (!ret) {
2089 newvp = NFSTOV(np);
2090 if (attrflag)
2091 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
2092 NULL, 0, 1);
2093 } else if (!error)
2094 error = ret;
2095 }
2096 if (!error && newvp == NULL) {
2097 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2098 cnp->cn_cred, cnp->cn_thread, &np);
2099 if (!error) {
2100 newvp = NFSTOV(np);
2101 if (newvp->v_type != VDIR)
2102 error = EEXIST;
2103 }
2104 }
2105 if (error) {
2106 if (newvp)
2107 vput(newvp);
2108 if (NFS_ISV4(dvp))
2109 error = nfscl_maperr(cnp->cn_thread, error,
2110 vap->va_uid, vap->va_gid);
2111 } else {
2112 /*
2113 * If negative lookup caching is enabled, I might as well
2114 * add an entry for this node. Not necessary for correctness,
2115 * but if negative caching is enabled, then the system
2116 * must care about lookup caching hit rate, so...
2117 */
2118 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 &&
2119 (cnp->cn_flags & MAKEENTRY))
2120 cache_enter(dvp, newvp, cnp);
2121 *ap->a_vpp = newvp;
2122 }
2123 return (error);
2124}
2125
2126/*
2127 * nfs remove directory call
2128 */
2129static int
2130nfs_rmdir(struct vop_rmdir_args *ap)
2131{
2132 struct vnode *vp = ap->a_vp;
2133 struct vnode *dvp = ap->a_dvp;
2134 struct componentname *cnp = ap->a_cnp;
2135 struct nfsnode *dnp;
2136 struct nfsvattr dnfsva;
2137 int error, dattrflag;
2138
2139 if (dvp == vp)
2140 return (EINVAL);
2141 error = nfsrpc_rmdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2142 cnp->cn_cred, cnp->cn_thread, &dnfsva, &dattrflag, NULL);
2143 dnp = VTONFS(dvp);
2144 mtx_lock(&dnp->n_mtx);
2145 dnp->n_flag |= NMODIFIED;
2146 if (dattrflag != 0) {
2147 mtx_unlock(&dnp->n_mtx);
2148 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2149 } else {
2150 dnp->n_attrstamp = 0;
2151 mtx_unlock(&dnp->n_mtx);
2152 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2153 }
2154
2155 cache_purge(dvp);
2156 cache_purge(vp);
2157 if (error && NFS_ISV4(dvp))
2158 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
2159 (gid_t)0);
2160 /*
2161 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2162 */
2163 if (error == ENOENT)
2164 error = 0;
2165 return (error);
2166}
2167
2168/*
2169 * nfs readdir call
2170 */
2171static int
2172nfs_readdir(struct vop_readdir_args *ap)
2173{
2174 struct vnode *vp = ap->a_vp;
2175 struct nfsnode *np = VTONFS(vp);
2176 struct uio *uio = ap->a_uio;
2177 int tresid, error = 0;
2178 struct vattr vattr;
2179
2180 if (vp->v_type != VDIR)
2181 return(EPERM);
2182
2183 /*
2184 * First, check for hit on the EOF offset cache
2185 */
2186 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2187 (np->n_flag & NMODIFIED) == 0) {
2188 if (VOP_GETATTR(vp, &vattr, ap->a_cred) == 0) {
2189 mtx_lock(&np->n_mtx);
2190 if ((NFS_ISV4(vp) && np->n_change == vattr.va_filerev) ||
2191 !NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
2192 mtx_unlock(&np->n_mtx);
2193 NFSINCRGLOBAL(newnfsstats.direofcache_hits);
2194 return (0);
2195 } else
2196 mtx_unlock(&np->n_mtx);
2197 }
2198 }
2199
2200 /*
2201 * Call ncl_bioread() to do the real work.
2202 */
2203 tresid = uio->uio_resid;
2204 error = ncl_bioread(vp, uio, 0, ap->a_cred);
2205
2206 if (!error && uio->uio_resid == tresid)
2207 NFSINCRGLOBAL(newnfsstats.direofcache_misses);
2208 return (error);
2209}
2210
2211/*
2212 * Readdir rpc call.
2213 * Called from below the buffer cache by ncl_doio().
2214 */
2215int
2216ncl_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2217 struct thread *td)
2218{
2219 struct nfsvattr nfsva;
2220 nfsuint64 *cookiep, cookie;
2221 struct nfsnode *dnp = VTONFS(vp);
2222 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2223 int error = 0, eof, attrflag;
2224
2225 KASSERT(uiop->uio_iovcnt == 1 &&
2226 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 &&
2227 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0,
2228 ("nfs readdirrpc bad uio"));
2229
2230 /*
2231 * If there is no cookie, assume directory was stale.
2232 */
2233 ncl_dircookie_lock(dnp);
2234 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2235 if (cookiep) {
2236 cookie = *cookiep;
2237 ncl_dircookie_unlock(dnp);
2238 } else {
2239 ncl_dircookie_unlock(dnp);
2240 return (NFSERR_BAD_COOKIE);
2241 }
2242
2243 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2244 (void)ncl_fsinfo(nmp, vp, cred, td);
2245
2246 error = nfsrpc_readdir(vp, uiop, &cookie, cred, td, &nfsva,
2247 &attrflag, &eof, NULL);
2248 if (attrflag)
2249 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2250
2251 if (!error) {
2252 /*
2253 * We are now either at the end of the directory or have filled
2254 * the block.
2255 */
2256 if (eof)
2257 dnp->n_direofoffset = uiop->uio_offset;
2258 else {
2259 if (uiop->uio_resid > 0)
2260 ncl_printf("EEK! readdirrpc resid > 0\n");
2261 ncl_dircookie_lock(dnp);
2262 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2263 *cookiep = cookie;
2264 ncl_dircookie_unlock(dnp);
2265 }
2266 } else if (NFS_ISV4(vp)) {
2267 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2268 }
2269 return (error);
2270}
2271
2272/*
2273 * NFS V3 readdir plus RPC. Used in place of ncl_readdirrpc().
2274 */
2275int
2276ncl_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2277 struct thread *td)
2278{
2279 struct nfsvattr nfsva;
2280 nfsuint64 *cookiep, cookie;
2281 struct nfsnode *dnp = VTONFS(vp);
2282 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2283 int error = 0, attrflag, eof;
2284
2285 KASSERT(uiop->uio_iovcnt == 1 &&
2286 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 &&
2287 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0,
2288 ("nfs readdirplusrpc bad uio"));
2289
2290 /*
2291 * If there is no cookie, assume directory was stale.
2292 */
2293 ncl_dircookie_lock(dnp);
2294 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2295 if (cookiep) {
2296 cookie = *cookiep;
2297 ncl_dircookie_unlock(dnp);
2298 } else {
2299 ncl_dircookie_unlock(dnp);
2300 return (NFSERR_BAD_COOKIE);
2301 }
2302
2303 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2304 (void)ncl_fsinfo(nmp, vp, cred, td);
2305 error = nfsrpc_readdirplus(vp, uiop, &cookie, cred, td, &nfsva,
2306 &attrflag, &eof, NULL);
2307 if (attrflag)
2308 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2309
2310 if (!error) {
2311 /*
2312 * We are now either at end of the directory or have filled the
2313 * the block.
2314 */
2315 if (eof)
2316 dnp->n_direofoffset = uiop->uio_offset;
2317 else {
2318 if (uiop->uio_resid > 0)
2319 ncl_printf("EEK! readdirplusrpc resid > 0\n");
2320 ncl_dircookie_lock(dnp);
2321 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2322 *cookiep = cookie;
2323 ncl_dircookie_unlock(dnp);
2324 }
2325 } else if (NFS_ISV4(vp)) {
2326 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2327 }
2328 return (error);
2329}
2330
2331/*
2332 * Silly rename. To make the NFS filesystem that is stateless look a little
2333 * more like the "ufs" a remove of an active vnode is translated to a rename
2334 * to a funny looking filename that is removed by nfs_inactive on the
2335 * nfsnode. There is the potential for another process on a different client
2336 * to create the same funny name between the nfs_lookitup() fails and the
2337 * nfs_rename() completes, but...
2338 */
2339static int
2340nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
2341{
2342 struct sillyrename *sp;
2343 struct nfsnode *np;
2344 int error;
2345 short pid;
2346 unsigned int lticks;
2347
2348 cache_purge(dvp);
2349 np = VTONFS(vp);
2350 KASSERT(vp->v_type != VDIR, ("nfs: sillyrename dir"));
2351 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2352 M_NEWNFSREQ, M_WAITOK);
2353 sp->s_cred = crhold(cnp->cn_cred);
2354 sp->s_dvp = dvp;
2355 VREF(dvp);
2356
2357 /*
2358 * Fudge together a funny name.
2359 * Changing the format of the funny name to accomodate more
2360 * sillynames per directory.
2361 * The name is now changed to .nfs.<ticks>.<pid>.4, where ticks is
2362 * CPU ticks since boot.
2363 */
2364 pid = cnp->cn_thread->td_proc->p_pid;
2365 lticks = (unsigned int)ticks;
2366 for ( ; ; ) {
2367 sp->s_namlen = sprintf(sp->s_name,
2368 ".nfs.%08x.%04x4.4", lticks,
2369 pid);
2370 if (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2371 cnp->cn_thread, NULL))
2372 break;
2373 lticks++;
2374 }
2375 error = nfs_renameit(dvp, vp, cnp, sp);
2376 if (error)
2377 goto bad;
2378 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2379 cnp->cn_thread, &np);
2380 np->n_sillyrename = sp;
2381 return (0);
2382bad:
2383 vrele(sp->s_dvp);
2384 crfree(sp->s_cred);
2385 free((caddr_t)sp, M_NEWNFSREQ);
2386 return (error);
2387}
2388
2389/*
2390 * Look up a file name and optionally either update the file handle or
2391 * allocate an nfsnode, depending on the value of npp.
2392 * npp == NULL --> just do the lookup
2393 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2394 * handled too
2395 * *npp != NULL --> update the file handle in the vnode
2396 */
2397static int
2398nfs_lookitup(struct vnode *dvp, char *name, int len, struct ucred *cred,
2399 struct thread *td, struct nfsnode **npp)
2400{
2401 struct vnode *newvp = NULL, *vp;
2402 struct nfsnode *np, *dnp = VTONFS(dvp);
2403 struct nfsfh *nfhp, *onfhp;
2404 struct nfsvattr nfsva, dnfsva;
2405 struct componentname cn;
2406 int error = 0, attrflag, dattrflag;
2407 u_int hash;
2408
2409 error = nfsrpc_lookup(dvp, name, len, cred, td, &dnfsva, &nfsva,
2410 &nfhp, &attrflag, &dattrflag, NULL);
2411 if (dattrflag)
2412 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2413 if (npp && !error) {
2414 if (*npp != NULL) {
2415 np = *npp;
2416 vp = NFSTOV(np);
2417 /*
2418 * For NFSv4, check to see if it is the same name and
2419 * replace the name, if it is different.
2420 */
2421 if (np->n_v4 != NULL && nfsva.na_type == VREG &&
2422 (np->n_v4->n4_namelen != len ||
2423 NFSBCMP(name, NFS4NODENAME(np->n_v4), len) ||
2424 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
2425 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2426 dnp->n_fhp->nfh_len))) {
2427#ifdef notdef
2428{ char nnn[100]; int nnnl;
2429nnnl = (len < 100) ? len : 99;
2430bcopy(name, nnn, nnnl);
2431nnn[nnnl] = '\0';
2432printf("replace=%s\n",nnn);
2433}
2434#endif
2435 FREE((caddr_t)np->n_v4, M_NFSV4NODE);
2436 MALLOC(np->n_v4, struct nfsv4node *,
2437 sizeof (struct nfsv4node) +
2438 dnp->n_fhp->nfh_len + len - 1,
2439 M_NFSV4NODE, M_WAITOK);
2440 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len;
2441 np->n_v4->n4_namelen = len;
2442 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2443 dnp->n_fhp->nfh_len);
2444 NFSBCOPY(name, NFS4NODENAME(np->n_v4), len);
2445 }
2446 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len,
2447 FNV1_32_INIT);
2448 onfhp = np->n_fhp;
2449 /*
2450 * Rehash node for new file handle.
2451 */
2452 vfs_hash_rehash(vp, hash);
2453 np->n_fhp = nfhp;
2454 if (onfhp != NULL)
2455 FREE((caddr_t)onfhp, M_NFSFH);
2456 newvp = NFSTOV(np);
2457 } else if (NFS_CMPFH(dnp, nfhp->nfh_fh, nfhp->nfh_len)) {
2458 FREE((caddr_t)nfhp, M_NFSFH);
2459 VREF(dvp);
2460 newvp = dvp;
2461 } else {
2462 cn.cn_nameptr = name;
2463 cn.cn_namelen = len;
2464 error = nfscl_nget(dvp->v_mount, dvp, nfhp, &cn, td,
2465 &np, NULL, LK_EXCLUSIVE);
2466 if (error)
2467 return (error);
2468 newvp = NFSTOV(np);
2469 }
2470 if (!attrflag && *npp == NULL) {
2471 if (newvp == dvp)
2472 vrele(newvp);
2473 else
2474 vput(newvp);
2475 return (ENOENT);
2476 }
2477 if (attrflag)
2478 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
2479 0, 1);
2480 }
2481 if (npp && *npp == NULL) {
2482 if (error) {
2483 if (newvp) {
2484 if (newvp == dvp)
2485 vrele(newvp);
2486 else
2487 vput(newvp);
2488 }
2489 } else
2490 *npp = np;
2491 }
2492 if (error && NFS_ISV4(dvp))
2493 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2494 return (error);
2495}
2496
2497/*
2498 * Nfs Version 3 and 4 commit rpc
2499 */
2500int
2501ncl_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred,
2502 struct thread *td)
2503{
2504 struct nfsvattr nfsva;
2505 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2506 int error, attrflag;
2507 u_char verf[NFSX_VERF];
2508
2509 mtx_lock(&nmp->nm_mtx);
2510 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) {
2511 mtx_unlock(&nmp->nm_mtx);
2512 return (0);
2513 }
2514 mtx_unlock(&nmp->nm_mtx);
2515 error = nfsrpc_commit(vp, offset, cnt, cred, td, verf, &nfsva,
2516 &attrflag, NULL);
2517 if (!error) {
2518 mtx_lock(&nmp->nm_mtx);
2519 if (NFSBCMP((caddr_t)nmp->nm_verf, verf, NFSX_VERF)) {
2520 NFSBCOPY(verf, (caddr_t)nmp->nm_verf, NFSX_VERF);
2521 error = NFSERR_STALEWRITEVERF;
2522 }
2523 mtx_unlock(&nmp->nm_mtx);
2524 if (!error && attrflag)
2525 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL,
2526 0, 1);
2527 } else if (NFS_ISV4(vp)) {
2528 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2529 }
2530 return (error);
2531}
2532
2533/*
2534 * Strategy routine.
2535 * For async requests when nfsiod(s) are running, queue the request by
2536 * calling ncl_asyncio(), otherwise just all ncl_doio() to do the
2537 * request.
2538 */
2539static int
2540nfs_strategy(struct vop_strategy_args *ap)
2541{
2542 struct buf *bp = ap->a_bp;
2543 struct ucred *cr;
2544
2545 KASSERT(!(bp->b_flags & B_DONE),
2546 ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
2547 BUF_ASSERT_HELD(bp);
2548
2549 if (bp->b_iocmd == BIO_READ)
2550 cr = bp->b_rcred;
2551 else
2552 cr = bp->b_wcred;
2553
2554 /*
2555 * If the op is asynchronous and an i/o daemon is waiting
2556 * queue the request, wake it up and wait for completion
2557 * otherwise just do it ourselves.
2558 */
2559 if ((bp->b_flags & B_ASYNC) == 0 ||
2560 ncl_asyncio(VFSTONFS(ap->a_vp->v_mount), bp, NOCRED, curthread))
2561 (void) ncl_doio(ap->a_vp, bp, cr, curthread, 1);
2562 return (0);
2563}
2564
2565/*
2566 * fsync vnode op. Just call ncl_flush() with commit == 1.
2567 */
2568/* ARGSUSED */
2569static int
2570nfs_fsync(struct vop_fsync_args *ap)
2571{
2572
2573 if (ap->a_vp->v_type != VREG) {
2574 /*
2575 * For NFS, metadata is changed synchronously on the server,
2576 * so there is nothing to flush. Also, ncl_flush() clears
2577 * the NMODIFIED flag and that shouldn't be done here for
2578 * directories.
2579 */
2580 return (0);
2581 }
2582 return (ncl_flush(ap->a_vp, ap->a_waitfor, NULL, ap->a_td, 1, 0));
2583}
2584
2585/*
2586 * Flush all the blocks associated with a vnode.
2587 * Walk through the buffer pool and push any dirty pages
2588 * associated with the vnode.
2589 * If the called_from_renewthread argument is TRUE, it has been called
2590 * from the NFSv4 renew thread and, as such, cannot block indefinitely
2591 * waiting for a buffer write to complete.
2592 */
2593int
2594ncl_flush(struct vnode *vp, int waitfor, struct ucred *cred, struct thread *td,
2595 int commit, int called_from_renewthread)
2596{
2597 struct nfsnode *np = VTONFS(vp);
2598 struct buf *bp;
2599 int i;
2600 struct buf *nbp;
2601 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2602 int error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2603 int passone = 1, trycnt = 0;
2604 u_quad_t off, endoff, toff;
2605 struct ucred* wcred = NULL;
2606 struct buf **bvec = NULL;
2607 struct bufobj *bo;
2608#ifndef NFS_COMMITBVECSIZ
2609#define NFS_COMMITBVECSIZ 20
2610#endif
2611 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2612 int bvecsize = 0, bveccount;
2613
2614 if (called_from_renewthread != 0)
2615 slptimeo = hz;
2616 if (nmp->nm_flag & NFSMNT_INT)
2617 slpflag = NFS_PCATCH;
2618 if (!commit)
2619 passone = 0;
2620 bo = &vp->v_bufobj;
2621 /*
2622 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2623 * server, but has not been committed to stable storage on the server
2624 * yet. On the first pass, the byte range is worked out and the commit
2625 * rpc is done. On the second pass, ncl_writebp() is called to do the
2626 * job.
2627 */
2628again:
2629 off = (u_quad_t)-1;
2630 endoff = 0;
2631 bvecpos = 0;
2632 if (NFS_ISV34(vp) && commit) {
2633 if (bvec != NULL && bvec != bvec_on_stack)
2634 free(bvec, M_TEMP);
2635 /*
2636 * Count up how many buffers waiting for a commit.
2637 */
2638 bveccount = 0;
2639 BO_LOCK(bo);
2640 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2641 if (!BUF_ISLOCKED(bp) &&
2642 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2643 == (B_DELWRI | B_NEEDCOMMIT))
2644 bveccount++;
2645 }
2646 /*
2647 * Allocate space to remember the list of bufs to commit. It is
2648 * important to use M_NOWAIT here to avoid a race with nfs_write.
2649 * If we can't get memory (for whatever reason), we will end up
2650 * committing the buffers one-by-one in the loop below.
2651 */
2652 if (bveccount > NFS_COMMITBVECSIZ) {
2653 /*
2654 * Release the vnode interlock to avoid a lock
2655 * order reversal.
2656 */
2657 BO_UNLOCK(bo);
2658 bvec = (struct buf **)
2659 malloc(bveccount * sizeof(struct buf *),
2660 M_TEMP, M_NOWAIT);
2661 BO_LOCK(bo);
2662 if (bvec == NULL) {
2663 bvec = bvec_on_stack;
2664 bvecsize = NFS_COMMITBVECSIZ;
2665 } else
2666 bvecsize = bveccount;
2667 } else {
2668 bvec = bvec_on_stack;
2669 bvecsize = NFS_COMMITBVECSIZ;
2670 }
2671 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2672 if (bvecpos >= bvecsize)
2673 break;
2674 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2675 nbp = TAILQ_NEXT(bp, b_bobufs);
2676 continue;
2677 }
2678 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2679 (B_DELWRI | B_NEEDCOMMIT)) {
2680 BUF_UNLOCK(bp);
2681 nbp = TAILQ_NEXT(bp, b_bobufs);
2682 continue;
2683 }
2684 BO_UNLOCK(bo);
2685 bremfree(bp);
2686 /*
2687 * Work out if all buffers are using the same cred
2688 * so we can deal with them all with one commit.
2689 *
2690 * NOTE: we are not clearing B_DONE here, so we have
2691 * to do it later on in this routine if we intend to
2692 * initiate I/O on the bp.
2693 *
2694 * Note: to avoid loopback deadlocks, we do not
2695 * assign b_runningbufspace.
2696 */
2697 if (wcred == NULL)
2698 wcred = bp->b_wcred;
2699 else if (wcred != bp->b_wcred)
2700 wcred = NOCRED;
2701 vfs_busy_pages(bp, 1);
2702
2703 BO_LOCK(bo);
2704 /*
2705 * bp is protected by being locked, but nbp is not
2706 * and vfs_busy_pages() may sleep. We have to
2707 * recalculate nbp.
2708 */
2709 nbp = TAILQ_NEXT(bp, b_bobufs);
2710
2711 /*
2712 * A list of these buffers is kept so that the
2713 * second loop knows which buffers have actually
2714 * been committed. This is necessary, since there
2715 * may be a race between the commit rpc and new
2716 * uncommitted writes on the file.
2717 */
2718 bvec[bvecpos++] = bp;
2719 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2720 bp->b_dirtyoff;
2721 if (toff < off)
2722 off = toff;
2723 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2724 if (toff > endoff)
2725 endoff = toff;
2726 }
2727 BO_UNLOCK(bo);
2728 }
2729 if (bvecpos > 0) {
2730 /*
2731 * Commit data on the server, as required.
2732 * If all bufs are using the same wcred, then use that with
2733 * one call for all of them, otherwise commit each one
2734 * separately.
2735 */
2736 if (wcred != NOCRED)
2737 retv = ncl_commit(vp, off, (int)(endoff - off),
2738 wcred, td);
2739 else {
2740 retv = 0;
2741 for (i = 0; i < bvecpos; i++) {
2742 off_t off, size;
2743 bp = bvec[i];
2744 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2745 bp->b_dirtyoff;
2746 size = (u_quad_t)(bp->b_dirtyend
2747 - bp->b_dirtyoff);
2748 retv = ncl_commit(vp, off, (int)size,
2749 bp->b_wcred, td);
2750 if (retv) break;
2751 }
2752 }
2753
2754 if (retv == NFSERR_STALEWRITEVERF)
2755 ncl_clearcommit(vp->v_mount);
2756
2757 /*
2758 * Now, either mark the blocks I/O done or mark the
2759 * blocks dirty, depending on whether the commit
2760 * succeeded.
2761 */
2762 for (i = 0; i < bvecpos; i++) {
2763 bp = bvec[i];
2764 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
2765 if (retv) {
2766 /*
2767 * Error, leave B_DELWRI intact
2768 */
2769 vfs_unbusy_pages(bp);
2770 brelse(bp);
2771 } else {
2772 /*
2773 * Success, remove B_DELWRI ( bundirty() ).
2774 *
2775 * b_dirtyoff/b_dirtyend seem to be NFS
2776 * specific. We should probably move that
2777 * into bundirty(). XXX
2778 */
2779 bufobj_wref(bo);
2780 bp->b_flags |= B_ASYNC;
2781 bundirty(bp);
2782 bp->b_flags &= ~B_DONE;
2783 bp->b_ioflags &= ~BIO_ERROR;
2784 bp->b_dirtyoff = bp->b_dirtyend = 0;
2785 bufdone(bp);
2786 }
2787 }
2788 }
2789
2790 /*
2791 * Start/do any write(s) that are required.
2792 */
2793loop:
2794 BO_LOCK(bo);
2795 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2796 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2797 if (waitfor != MNT_WAIT || passone)
2798 continue;
2799
2800 error = BUF_TIMELOCK(bp,
2801 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK,
2802 BO_MTX(bo), "nfsfsync", slpflag, slptimeo);
2803 if (error == 0) {
2804 BUF_UNLOCK(bp);
2805 goto loop;
2806 }
2807 if (error == ENOLCK) {
2808 error = 0;
2809 goto loop;
2810 }
2811 if (called_from_renewthread != 0) {
2812 /*
2813 * Return EIO so the flush will be retried
2814 * later.
2815 */
2816 error = EIO;
2817 goto done;
2818 }
2819 if (newnfs_sigintr(nmp, td)) {
2820 error = EINTR;
2821 goto done;
2822 }
2823 if (slpflag & PCATCH) {
2824 slpflag = 0;
2825 slptimeo = 2 * hz;
2826 }
2827 goto loop;
2828 }
2829 if ((bp->b_flags & B_DELWRI) == 0)
2830 panic("nfs_fsync: not dirty");
2831 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
2832 BUF_UNLOCK(bp);
2833 continue;
2834 }
2835 BO_UNLOCK(bo);
2836 bremfree(bp);
2837 if (passone || !commit)
2838 bp->b_flags |= B_ASYNC;
2839 else
2840 bp->b_flags |= B_ASYNC;
2841 bwrite(bp);
2842 if (newnfs_sigintr(nmp, td)) {
2843 error = EINTR;
2844 goto done;
2845 }
2846 goto loop;
2847 }
2848 if (passone) {
2849 passone = 0;
2850 BO_UNLOCK(bo);
2851 goto again;
2852 }
2853 if (waitfor == MNT_WAIT) {
2854 while (bo->bo_numoutput) {
2855 error = bufobj_wwait(bo, slpflag, slptimeo);
2856 if (error) {
2857 BO_UNLOCK(bo);
2858 if (called_from_renewthread != 0) {
2859 /*
2860 * Return EIO so that the flush will be
2861 * retried later.
2862 */
2863 error = EIO;
2864 goto done;
2865 }
2866 error = newnfs_sigintr(nmp, td);
2867 if (error)
2868 goto done;
2869 if (slpflag & PCATCH) {
2870 slpflag = 0;
2871 slptimeo = 2 * hz;
2872 }
2873 BO_LOCK(bo);
2874 }
2875 }
2876 if (bo->bo_dirty.bv_cnt != 0 && commit) {
2877 BO_UNLOCK(bo);
2878 goto loop;
2879 }
2880 /*
2881 * Wait for all the async IO requests to drain
2882 */
2883 BO_UNLOCK(bo);
2884 mtx_lock(&np->n_mtx);
2885 while (np->n_directio_asyncwr > 0) {
2886 np->n_flag |= NFSYNCWAIT;
2887 error = newnfs_msleep(td, &np->n_directio_asyncwr,
2888 &np->n_mtx, slpflag | (PRIBIO + 1),
2889 "nfsfsync", 0);
2890 if (error) {
2891 if (newnfs_sigintr(nmp, td)) {
2892 mtx_unlock(&np->n_mtx);
2893 error = EINTR;
2894 goto done;
2895 }
2896 }
2897 }
2898 mtx_unlock(&np->n_mtx);
2899 } else
2900 BO_UNLOCK(bo);
2901 mtx_lock(&np->n_mtx);
2902 if (np->n_flag & NWRITEERR) {
2903 error = np->n_error;
2904 np->n_flag &= ~NWRITEERR;
2905 }
2906 if (commit && bo->bo_dirty.bv_cnt == 0 &&
2907 bo->bo_numoutput == 0 && np->n_directio_asyncwr == 0)
2908 np->n_flag &= ~NMODIFIED;
2909 mtx_unlock(&np->n_mtx);
2910done:
2911 if (bvec != NULL && bvec != bvec_on_stack)
2912 free(bvec, M_TEMP);
2913 if (error == 0 && commit != 0 && waitfor == MNT_WAIT &&
2914 (bo->bo_dirty.bv_cnt != 0 || bo->bo_numoutput != 0 ||
2915 np->n_directio_asyncwr != 0) && trycnt++ < 5) {
2916 /* try, try again... */
2917 passone = 1;
2918 wcred = NULL;
2919 bvec = NULL;
2920 bvecsize = 0;
2921printf("try%d\n", trycnt);
2922 goto again;
2923 }
2924 return (error);
2925}
2926
2927/*
2928 * NFS advisory byte-level locks.
2929 */
2930static int
2931nfs_advlock(struct vop_advlock_args *ap)
2932{
2933 struct vnode *vp = ap->a_vp;
2934 struct ucred *cred;
2935 struct nfsnode *np = VTONFS(ap->a_vp);
2936 struct proc *p = (struct proc *)ap->a_id;
2937 struct thread *td = curthread; /* XXX */
2938 struct vattr va;
2939 int ret, error = EOPNOTSUPP;
2940 u_quad_t size;
2941
2942 if (NFS_ISV4(vp) && (ap->a_flags & (F_POSIX | F_FLOCK)) != 0) {
2943 if (vp->v_type != VREG)
2944 return (EINVAL);
2945 if ((ap->a_flags & F_POSIX) != 0)
2946 cred = p->p_ucred;
2947 else
2948 cred = td->td_ucred;
2949 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
2950 if (vp->v_iflag & VI_DOOMED) {
2951 NFSVOPUNLOCK(vp, 0);
2952 return (EBADF);
2953 }
2954
2955 /*
2956 * If this is unlocking a write locked region, flush and
2957 * commit them before unlocking. This is required by
2958 * RFC3530 Sec. 9.3.2.
2959 */
2960 if (ap->a_op == F_UNLCK &&
2961 nfscl_checkwritelocked(vp, ap->a_fl, cred, td, ap->a_id,
2962 ap->a_flags))
2963 (void) ncl_flush(vp, MNT_WAIT, cred, td, 1, 0);
2964
2965 /*
2966 * Loop around doing the lock op, while a blocking lock
2967 * must wait for the lock op to succeed.
2968 */
2969 do {
2970 ret = nfsrpc_advlock(vp, np->n_size, ap->a_op,
2971 ap->a_fl, 0, cred, td, ap->a_id, ap->a_flags);
2972 if (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
2973 ap->a_op == F_SETLK) {
2974 NFSVOPUNLOCK(vp, 0);
2975 error = nfs_catnap(PZERO | PCATCH, ret,
2976 "ncladvl");
2977 if (error)
2978 return (EINTR);
2979 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
2980 if (vp->v_iflag & VI_DOOMED) {
2981 NFSVOPUNLOCK(vp, 0);
2982 return (EBADF);
2983 }
2984 }
2985 } while (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
2986 ap->a_op == F_SETLK);
2987 if (ret == NFSERR_DENIED) {
2988 NFSVOPUNLOCK(vp, 0);
2989 return (EAGAIN);
2990 } else if (ret == EINVAL || ret == EBADF || ret == EINTR) {
2991 NFSVOPUNLOCK(vp, 0);
2992 return (ret);
2993 } else if (ret != 0) {
2994 NFSVOPUNLOCK(vp, 0);
2995 return (EACCES);
2996 }
2997
2998 /*
2999 * Now, if we just got a lock, invalidate data in the buffer
3000 * cache, as required, so that the coherency conforms with
3001 * RFC3530 Sec. 9.3.2.
3002 */
3003 if (ap->a_op == F_SETLK) {
3004 if ((np->n_flag & NMODIFIED) == 0) {
3005 np->n_attrstamp = 0;
3006 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
3007 ret = VOP_GETATTR(vp, &va, cred);
3008 }
3009 if ((np->n_flag & NMODIFIED) || ret ||
3010 np->n_change != va.va_filerev) {
3011 (void) ncl_vinvalbuf(vp, V_SAVE, td, 1);
3012 np->n_attrstamp = 0;
3013 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
3014 ret = VOP_GETATTR(vp, &va, cred);
3015 if (!ret) {
3016 np->n_mtime = va.va_mtime;
3017 np->n_change = va.va_filerev;
3018 }
3019 }
3020 }
3021 NFSVOPUNLOCK(vp, 0);
3022 return (0);
3023 } else if (!NFS_ISV4(vp)) {
3024 error = NFSVOPLOCK(vp, LK_SHARED);
3025 if (error)
3026 return (error);
3027 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
3028 size = VTONFS(vp)->n_size;
3029 NFSVOPUNLOCK(vp, 0);
3030 error = lf_advlock(ap, &(vp->v_lockf), size);
3031 } else {
3032 if (nfs_advlock_p != NULL)
3033 error = nfs_advlock_p(ap);
3034 else {
3035 NFSVOPUNLOCK(vp, 0);
3036 error = ENOLCK;
3037 }
3038 }
3039 }
3040 return (error);
3041}
3042
3043/*
3044 * NFS advisory byte-level locks.
3045 */
3046static int
3047nfs_advlockasync(struct vop_advlockasync_args *ap)
3048{
3049 struct vnode *vp = ap->a_vp;
3050 u_quad_t size;
3051 int error;
3052
3053 if (NFS_ISV4(vp))
3054 return (EOPNOTSUPP);
3055 error = NFSVOPLOCK(vp, LK_SHARED);
3056 if (error)
3057 return (error);
3058 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
3059 size = VTONFS(vp)->n_size;
3060 NFSVOPUNLOCK(vp, 0);
3061 error = lf_advlockasync(ap, &(vp->v_lockf), size);
3062 } else {
3063 NFSVOPUNLOCK(vp, 0);
3064 error = EOPNOTSUPP;
3065 }
3066 return (error);
3067}
3068
3069/*
3070 * Print out the contents of an nfsnode.
3071 */
3072static int
3073nfs_print(struct vop_print_args *ap)
3074{
3075 struct vnode *vp = ap->a_vp;
3076 struct nfsnode *np = VTONFS(vp);
3077
3078 ncl_printf("\tfileid %ld fsid 0x%x",
3079 np->n_vattr.na_fileid, np->n_vattr.na_fsid);
3080 if (vp->v_type == VFIFO)
3081 fifo_printinfo(vp);
3082 printf("\n");
3083 return (0);
3084}
3085
3086/*
3087 * This is the "real" nfs::bwrite(struct buf*).
3088 * We set B_CACHE if this is a VMIO buffer.
3089 */
3090int
3091ncl_writebp(struct buf *bp, int force __unused, struct thread *td)
3092{
3093 int s;
3094 int oldflags = bp->b_flags;
3095#if 0
3096 int retv = 1;
3097 off_t off;
3098#endif
3099
3100 BUF_ASSERT_HELD(bp);
3101
3102 if (bp->b_flags & B_INVAL) {
3103 brelse(bp);
3104 return(0);
3105 }
3106
3107 bp->b_flags |= B_CACHE;
3108
3109 /*
3110 * Undirty the bp. We will redirty it later if the I/O fails.
3111 */
3112
3113 s = splbio();
3114 bundirty(bp);
3115 bp->b_flags &= ~B_DONE;
3116 bp->b_ioflags &= ~BIO_ERROR;
3117 bp->b_iocmd = BIO_WRITE;
3118
3119 bufobj_wref(bp->b_bufobj);
3120 curthread->td_ru.ru_oublock++;
3121 splx(s);
3122
3123 /*
3124 * Note: to avoid loopback deadlocks, we do not
3125 * assign b_runningbufspace.
3126 */
3127 vfs_busy_pages(bp, 1);
3128
3129 BUF_KERNPROC(bp);
3130 bp->b_iooffset = dbtob(bp->b_blkno);
3131 bstrategy(bp);
3132
3133 if( (oldflags & B_ASYNC) == 0) {
3134 int rtval = bufwait(bp);
3135
3136 if (oldflags & B_DELWRI) {
3137 s = splbio();
3138 reassignbuf(bp);
3139 splx(s);
3140 }
3141 brelse(bp);
3142 return (rtval);
3143 }
3144
3145 return (0);
3146}
3147
3148/*
3149 * nfs special file access vnode op.
3150 * Essentially just get vattr and then imitate iaccess() since the device is
3151 * local to the client.
3152 */
3153static int
3154nfsspec_access(struct vop_access_args *ap)
3155{
3156 struct vattr *vap;
3157 struct ucred *cred = ap->a_cred;
3158 struct vnode *vp = ap->a_vp;
3159 accmode_t accmode = ap->a_accmode;
3160 struct vattr vattr;
3161 int error;
3162
3163 /*
3164 * Disallow write attempts on filesystems mounted read-only;
3165 * unless the file is a socket, fifo, or a block or character
3166 * device resident on the filesystem.
3167 */
3168 if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3169 switch (vp->v_type) {
3170 case VREG:
3171 case VDIR:
3172 case VLNK:
3173 return (EROFS);
3174 default:
3175 break;
3176 }
3177 }
3178 vap = &vattr;
3179 error = VOP_GETATTR(vp, vap, cred);
3180 if (error)
3181 goto out;
3182 error = vaccess(vp->v_type, vap->va_mode, vap->va_uid, vap->va_gid,
3183 accmode, cred, NULL);
3184out:
3185 return error;
3186}
3187
3188/*
3189 * Read wrapper for fifos.
3190 */
3191static int
3192nfsfifo_read(struct vop_read_args *ap)
3193{
3194 struct nfsnode *np = VTONFS(ap->a_vp);
3195 int error;
3196
3197 /*
3198 * Set access flag.
3199 */
3200 mtx_lock(&np->n_mtx);
3201 np->n_flag |= NACC;
3202 getnanotime(&np->n_atim);
3203 mtx_unlock(&np->n_mtx);
3204 error = fifo_specops.vop_read(ap);
3205 return error;
3206}
3207
3208/*
3209 * Write wrapper for fifos.
3210 */
3211static int
3212nfsfifo_write(struct vop_write_args *ap)
3213{
3214 struct nfsnode *np = VTONFS(ap->a_vp);
3215
3216 /*
3217 * Set update flag.
3218 */
3219 mtx_lock(&np->n_mtx);
3220 np->n_flag |= NUPD;
3221 getnanotime(&np->n_mtim);
3222 mtx_unlock(&np->n_mtx);
3223 return(fifo_specops.vop_write(ap));
3224}
3225
3226/*
3227 * Close wrapper for fifos.
3228 *
3229 * Update the times on the nfsnode then do fifo close.
3230 */
3231static int
3232nfsfifo_close(struct vop_close_args *ap)
3233{
3234 struct vnode *vp = ap->a_vp;
3235 struct nfsnode *np = VTONFS(vp);
3236 struct vattr vattr;
3237 struct timespec ts;
3238
3239 mtx_lock(&np->n_mtx);
3240 if (np->n_flag & (NACC | NUPD)) {
3241 getnanotime(&ts);
3242 if (np->n_flag & NACC)
3243 np->n_atim = ts;
3244 if (np->n_flag & NUPD)
3245 np->n_mtim = ts;
3246 np->n_flag |= NCHG;
3247 if (vrefcnt(vp) == 1 &&
3248 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3249 VATTR_NULL(&vattr);
3250 if (np->n_flag & NACC)
3251 vattr.va_atime = np->n_atim;
3252 if (np->n_flag & NUPD)
3253 vattr.va_mtime = np->n_mtim;
3254 mtx_unlock(&np->n_mtx);
3255 (void)VOP_SETATTR(vp, &vattr, ap->a_cred);
3256 goto out;
3257 }
3258 }
3259 mtx_unlock(&np->n_mtx);
3260out:
3261 return (fifo_specops.vop_close(ap));
3262}
3263
3264/*
3265 * Just call ncl_writebp() with the force argument set to 1.
3266 *
3267 * NOTE: B_DONE may or may not be set in a_bp on call.
3268 */
3269static int
3270nfs_bwrite(struct buf *bp)
3271{
3272
3273 return (ncl_writebp(bp, 1, curthread));
3274}
3275
3276struct buf_ops buf_ops_newnfs = {
3277 .bop_name = "buf_ops_nfs",
3278 .bop_write = nfs_bwrite,
3279 .bop_strategy = bufstrategy,
3280 .bop_sync = bufsync,
3281 .bop_bdflush = bufbdflush,
3282};
3283
3284/*
3285 * Cloned from vop_stdlock(), and then the ugly hack added.
3286 */
3287static int
3288nfs_lock1(struct vop_lock1_args *ap)
3289{
3290 struct vnode *vp = ap->a_vp;
3291 int error = 0;
3292
3293 /*
3294 * Since vfs_hash_get() calls vget() and it will no longer work
3295 * for FreeBSD8 with flags == 0, I can only think of this horrible
3296 * hack to work around it. I call vfs_hash_get() with LK_EXCLOTHER
3297 * and then handle it here. All I want for this case is a v_usecount
3298 * on the vnode to use for recovery, while another thread might
3299 * hold a lock on the vnode. I have the other threads blocked, so
3300 * there isn't any race problem.
3301 */
3302 if ((ap->a_flags & LK_TYPE_MASK) == LK_EXCLOTHER) {
3303 if ((ap->a_flags & LK_INTERLOCK) == 0)
3304 panic("ncllock1");
3305 if ((vp->v_iflag & VI_DOOMED))
3306 error = ENOENT;
3307 VI_UNLOCK(vp);
3308 return (error);
3309 }
3310 return (_lockmgr_args(vp->v_vnlock, ap->a_flags, VI_MTX(vp),
3311 LK_WMESG_DEFAULT, LK_PRIO_DEFAULT, LK_TIMO_DEFAULT, ap->a_file,
3312 ap->a_line));
3313}
3314
3315static int
3316nfs_getacl(struct vop_getacl_args *ap)
3317{
3318 int error;
3319
3320 if (ap->a_type != ACL_TYPE_NFS4)
3321 return (EOPNOTSUPP);
3322 error = nfsrpc_getacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3323 NULL);
3324 if (error > NFSERR_STALE) {
3325 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3326 error = EPERM;
3327 }
3328 return (error);
3329}
3330
3331static int
3332nfs_setacl(struct vop_setacl_args *ap)
3333{
3334 int error;
3335
3336 if (ap->a_type != ACL_TYPE_NFS4)
3337 return (EOPNOTSUPP);
3338 error = nfsrpc_setacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3339 NULL);
3340 if (error > NFSERR_STALE) {
3341 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3342 error = EPERM;
3343 }
3344 return (error);
3345}
3346
3347/*
3348 * Return POSIX pathconf information applicable to nfs filesystems.
3349 */
3350static int
3351nfs_pathconf(struct vop_pathconf_args *ap)
3352{
3353 struct nfsv3_pathconf pc;
3354 struct nfsvattr nfsva;
3355 struct vnode *vp = ap->a_vp;
3356 struct thread *td = curthread;
3357 int attrflag, error;
3358
3359 if (NFS_ISV4(vp) || (NFS_ISV3(vp) && (ap->a_name == _PC_LINK_MAX ||
3360 ap->a_name == _PC_NAME_MAX || ap->a_name == _PC_CHOWN_RESTRICTED ||
3361 ap->a_name == _PC_NO_TRUNC))) {
3362 /*
3363 * Since only the above 4 a_names are returned by the NFSv3
3364 * Pathconf RPC, there is no point in doing it for others.
3365 */
3366 error = nfsrpc_pathconf(vp, &pc, td->td_ucred, td, &nfsva,
3367 &attrflag, NULL);
3368 if (attrflag != 0)
3369 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
3370 1);
3371 if (error != 0)
3372 return (error);
3373 } else {
3374 /*
3375 * For NFSv2 (or NFSv3 when not one of the above 4 a_names),
3376 * just fake them.
3377 */
3378 pc.pc_linkmax = LINK_MAX;
3379 pc.pc_namemax = NFS_MAXNAMLEN;
3380 pc.pc_notrunc = 1;
3381 pc.pc_chownrestricted = 1;
3382 pc.pc_caseinsensitive = 0;
3383 pc.pc_casepreserving = 1;
3384 error = 0;
3385 }
3386 switch (ap->a_name) {
3387 case _PC_LINK_MAX:
3388 *ap->a_retval = pc.pc_linkmax;
3389 break;
3390 case _PC_NAME_MAX:
3391 *ap->a_retval = pc.pc_namemax;
3392 break;
3393 case _PC_PATH_MAX:
3394 *ap->a_retval = PATH_MAX;
3395 break;
3396 case _PC_PIPE_BUF:
3397 *ap->a_retval = PIPE_BUF;
3398 break;
3399 case _PC_CHOWN_RESTRICTED:
3400 *ap->a_retval = pc.pc_chownrestricted;
3401 break;
3402 case _PC_NO_TRUNC:
3403 *ap->a_retval = pc.pc_notrunc;
3404 break;
3405 case _PC_ACL_EXTENDED:
3406 *ap->a_retval = 0;
3407 break;
3408 case _PC_ACL_NFS4:
3409 if (NFS_ISV4(vp) && nfsrv_useacl != 0 && attrflag != 0 &&
3410 NFSISSET_ATTRBIT(&nfsva.na_suppattr, NFSATTRBIT_ACL))
3411 *ap->a_retval = 1;
3412 else
3413 *ap->a_retval = 0;
3414 break;
3415 case _PC_ACL_PATH_MAX:
3416 if (NFS_ISV4(vp))
3417 *ap->a_retval = ACL_MAX_ENTRIES;
3418 else
3419 *ap->a_retval = 3;
3420 break;
3421 case _PC_MAC_PRESENT:
3422 *ap->a_retval = 0;
3423 break;
3424 case _PC_ASYNC_IO:
3425 /* _PC_ASYNC_IO should have been handled by upper layers. */
3426 KASSERT(0, ("_PC_ASYNC_IO should not get here"));
3427 error = EINVAL;
3428 break;
3429 case _PC_PRIO_IO:
3430 *ap->a_retval = 0;
3431 break;
3432 case _PC_SYNC_IO:
3433 *ap->a_retval = 0;
3434 break;
3435 case _PC_ALLOC_SIZE_MIN:
3436 *ap->a_retval = vp->v_mount->mnt_stat.f_bsize;
3437 break;
3438 case _PC_FILESIZEBITS:
3439 if (NFS_ISV34(vp))
3440 *ap->a_retval = 64;
3441 else
3442 *ap->a_retval = 32;
3443 break;
3444 case _PC_REC_INCR_XFER_SIZE:
3445 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
3446 break;
3447 case _PC_REC_MAX_XFER_SIZE:
3448 *ap->a_retval = -1; /* means ``unlimited'' */
3449 break;
3450 case _PC_REC_MIN_XFER_SIZE:
3451 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
3452 break;
3453 case _PC_REC_XFER_ALIGN:
3454 *ap->a_retval = PAGE_SIZE;
3455 break;
3456 case _PC_SYMLINK_MAX:
3457 *ap->a_retval = NFS_MAXPATHLEN;
3458 break;
3459
3460 default:
3461 error = EINVAL;
3462 break;
3463 }
3464 return (error);
3465}
3466
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