37
38/*
39 * vnode op calls for Sun NFS version 2, 3 and 4
40 */
41
42#include "opt_inet.h"
43
44#include <sys/param.h>
45#include <sys/kernel.h>
46#include <sys/systm.h>
47#include <sys/resourcevar.h>
48#include <sys/proc.h>
49#include <sys/mount.h>
50#include <sys/bio.h>
51#include <sys/buf.h>
52#include <sys/jail.h>
53#include <sys/malloc.h>
54#include <sys/mbuf.h>
55#include <sys/namei.h>
56#include <sys/socket.h>
57#include <sys/vnode.h>
58#include <sys/dirent.h>
59#include <sys/fcntl.h>
60#include <sys/lockf.h>
61#include <sys/stat.h>
62#include <sys/sysctl.h>
63#include <sys/signalvar.h>
64
65#include <vm/vm.h>
66#include <vm/vm_object.h>
67#include <vm/vm_extern.h>
68#include <vm/vm_object.h>
69
70
71#include <fs/nfs/nfsport.h>
72#include <fs/nfsclient/nfsnode.h>
73#include <fs/nfsclient/nfsmount.h>
74#include <fs/nfsclient/nfs.h>
75#include <fs/nfsclient/nfs_lock.h>
76
77#include <net/if.h>
78#include <netinet/in.h>
79#include <netinet/in_var.h>
80
81/* Defs */
82#define TRUE 1
83#define FALSE 0
84
85extern struct nfsstats newnfsstats;
86MALLOC_DECLARE(M_NEWNFSREQ);
87vop_advlock_t *ncl_advlock_p = ncl_dolock;
88
89/*
90 * Ifdef for FreeBSD-current merged buffer cache. It is unfortunate that these
91 * calls are not in getblk() and brelse() so that they would not be necessary
92 * here.
93 */
94#ifndef B_VMIO
95#define vfs_busy_pages(bp, f)
96#endif
97
98static vop_read_t nfsfifo_read;
99static vop_write_t nfsfifo_write;
100static vop_close_t nfsfifo_close;
101static int nfs_setattrrpc(struct vnode *, struct vattr *, struct ucred *,
102 struct thread *);
103static vop_lookup_t nfs_lookup;
104static vop_create_t nfs_create;
105static vop_mknod_t nfs_mknod;
106static vop_open_t nfs_open;
107static vop_close_t nfs_close;
108static vop_access_t nfs_access;
109static vop_getattr_t nfs_getattr;
110static vop_setattr_t nfs_setattr;
111static vop_read_t nfs_read;
112static vop_fsync_t nfs_fsync;
113static vop_remove_t nfs_remove;
114static vop_link_t nfs_link;
115static vop_rename_t nfs_rename;
116static vop_mkdir_t nfs_mkdir;
117static vop_rmdir_t nfs_rmdir;
118static vop_symlink_t nfs_symlink;
119static vop_readdir_t nfs_readdir;
120static vop_strategy_t nfs_strategy;
121static vop_lock1_t nfs_lock1;
122static int nfs_lookitup(struct vnode *, char *, int,
123 struct ucred *, struct thread *, struct nfsnode **);
124static int nfs_sillyrename(struct vnode *, struct vnode *,
125 struct componentname *);
126static vop_access_t nfsspec_access;
127static vop_readlink_t nfs_readlink;
128static vop_print_t nfs_print;
129static vop_advlock_t nfs_advlock;
130static vop_advlockasync_t nfs_advlockasync;
131#ifdef NFS4_ACL_EXTATTR_NAME
132static vop_getacl_t nfs_getacl;
133static vop_setacl_t nfs_setacl;
134#endif
135
136/*
137 * Global vfs data structures for nfs
138 */
139struct vop_vector newnfs_vnodeops = {
140 .vop_default = &default_vnodeops,
141 .vop_access = nfs_access,
142 .vop_advlock = nfs_advlock,
143 .vop_advlockasync = nfs_advlockasync,
144 .vop_close = nfs_close,
145 .vop_create = nfs_create,
146 .vop_fsync = nfs_fsync,
147 .vop_getattr = nfs_getattr,
148 .vop_getpages = ncl_getpages,
149 .vop_putpages = ncl_putpages,
150 .vop_inactive = ncl_inactive,
151 .vop_link = nfs_link,
152 .vop_lock1 = nfs_lock1,
153 .vop_lookup = nfs_lookup,
154 .vop_mkdir = nfs_mkdir,
155 .vop_mknod = nfs_mknod,
156 .vop_open = nfs_open,
157 .vop_print = nfs_print,
158 .vop_read = nfs_read,
159 .vop_readdir = nfs_readdir,
160 .vop_readlink = nfs_readlink,
161 .vop_reclaim = ncl_reclaim,
162 .vop_remove = nfs_remove,
163 .vop_rename = nfs_rename,
164 .vop_rmdir = nfs_rmdir,
165 .vop_setattr = nfs_setattr,
166 .vop_strategy = nfs_strategy,
167 .vop_symlink = nfs_symlink,
168 .vop_write = ncl_write,
169#ifdef NFS4_ACL_EXTATTR_NAME
170 .vop_getacl = nfs_getacl,
171 .vop_setacl = nfs_setacl,
172#endif
173};
174
175struct vop_vector newnfs_fifoops = {
176 .vop_default = &fifo_specops,
177 .vop_access = nfsspec_access,
178 .vop_close = nfsfifo_close,
179 .vop_fsync = nfs_fsync,
180 .vop_getattr = nfs_getattr,
181 .vop_inactive = ncl_inactive,
182 .vop_print = nfs_print,
183 .vop_read = nfsfifo_read,
184 .vop_reclaim = ncl_reclaim,
185 .vop_setattr = nfs_setattr,
186 .vop_write = nfsfifo_write,
187};
188
189static int nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp,
190 struct componentname *cnp, struct vattr *vap);
191static int nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
192 int namelen, struct ucred *cred, struct thread *td);
193static int nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp,
194 char *fnameptr, int fnamelen, struct vnode *tdvp, struct vnode *tvp,
195 char *tnameptr, int tnamelen, struct ucred *cred, struct thread *td);
196static int nfs_renameit(struct vnode *sdvp, struct vnode *svp,
197 struct componentname *scnp, struct sillyrename *sp);
198
199/*
200 * Global variables
201 */
202#define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1))
203
204SYSCTL_DECL(_vfs_newnfs);
205
206static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO;
207SYSCTL_INT(_vfs_newnfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
208 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
209
210static int nfs_prime_access_cache = 0;
211SYSCTL_INT(_vfs_newnfs, OID_AUTO, prime_access_cache, CTLFLAG_RW,
212 &nfs_prime_access_cache, 0,
213 "Prime NFS ACCESS cache when fetching attributes");
214
215static int newnfs_commit_on_close = 0;
216SYSCTL_INT(_vfs_newnfs, OID_AUTO, commit_on_close, CTLFLAG_RW,
217 &newnfs_commit_on_close, 0, "write+commit on close, else only write");
218
219static int nfs_clean_pages_on_close = 1;
220SYSCTL_INT(_vfs_newnfs, OID_AUTO, clean_pages_on_close, CTLFLAG_RW,
221 &nfs_clean_pages_on_close, 0, "NFS clean dirty pages on close");
222
223int newnfs_directio_enable = 0;
224SYSCTL_INT(_vfs_newnfs, OID_AUTO, directio_enable, CTLFLAG_RW,
225 &newnfs_directio_enable, 0, "Enable NFS directio");
226
227static int newnfs_neglookup_enable = 1;
228SYSCTL_INT(_vfs_newnfs, OID_AUTO, neglookup_enable, CTLFLAG_RW,
229 &newnfs_neglookup_enable, 0, "Enable NFS negative lookup caching");
230
231/*
232 * This sysctl allows other processes to mmap a file that has been opened
233 * O_DIRECT by a process. In general, having processes mmap the file while
234 * Direct IO is in progress can lead to Data Inconsistencies. But, we allow
235 * this by default to prevent DoS attacks - to prevent a malicious user from
236 * opening up files O_DIRECT preventing other users from mmap'ing these
237 * files. "Protected" environments where stricter consistency guarantees are
238 * required can disable this knob. The process that opened the file O_DIRECT
239 * cannot mmap() the file, because mmap'ed IO on an O_DIRECT open() is not
240 * meaningful.
241 */
242int newnfs_directio_allow_mmap = 1;
243SYSCTL_INT(_vfs_newnfs, OID_AUTO, directio_allow_mmap, CTLFLAG_RW,
244 &newnfs_directio_allow_mmap, 0, "Enable mmaped IO on file with O_DIRECT opens");
245
246#if 0
247SYSCTL_INT(_vfs_newnfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
248 &newnfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
249
250SYSCTL_INT(_vfs_newnfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
251 &newnfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
252#endif
253
254#define NFSACCESS_ALL (NFSACCESS_READ | NFSACCESS_MODIFY \
255 | NFSACCESS_EXTEND | NFSACCESS_EXECUTE \
256 | NFSACCESS_DELETE | NFSACCESS_LOOKUP)
257
258/*
259 * SMP Locking Note :
260 * The list of locks after the description of the lock is the ordering
261 * of other locks acquired with the lock held.
262 * np->n_mtx : Protects the fields in the nfsnode.
263 VM Object Lock
264 VI_MTX (acquired indirectly)
265 * nmp->nm_mtx : Protects the fields in the nfsmount.
266 rep->r_mtx
267 * ncl_iod_mutex : Global lock, protects shared nfsiod state.
268 * nfs_reqq_mtx : Global lock, protects the nfs_reqq list.
269 nmp->nm_mtx
270 rep->r_mtx
271 * rep->r_mtx : Protects the fields in an nfsreq.
272 */
273
274static int
275nfs34_access_otw(struct vnode *vp, int wmode, struct thread *td,
276 struct ucred *cred, u_int32_t *retmode)
277{
278 int error = 0, attrflag, i, lrupos;
279 u_int32_t rmode;
280 struct nfsnode *np = VTONFS(vp);
281 struct nfsvattr nfsva;
282
283 error = nfsrpc_accessrpc(vp, wmode, cred, td, &nfsva, &attrflag,
284 &rmode, NULL);
285 if (attrflag)
286 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
287 if (!error) {
288 lrupos = 0;
289 mtx_lock(&np->n_mtx);
290 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) {
291 if (np->n_accesscache[i].uid == cred->cr_uid) {
292 np->n_accesscache[i].mode = rmode;
293 np->n_accesscache[i].stamp = time_second;
294 break;
295 }
296 if (i > 0 && np->n_accesscache[i].stamp <
297 np->n_accesscache[lrupos].stamp)
298 lrupos = i;
299 }
300 if (i == NFS_ACCESSCACHESIZE) {
301 np->n_accesscache[lrupos].uid = cred->cr_uid;
302 np->n_accesscache[lrupos].mode = rmode;
303 np->n_accesscache[lrupos].stamp = time_second;
304 }
305 mtx_unlock(&np->n_mtx);
306 if (retmode != NULL)
307 *retmode = rmode;
308 } else if (NFS_ISV4(vp)) {
309 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
310 }
311 return (error);
312}
313
314/*
315 * nfs access vnode op.
316 * For nfs version 2, just return ok. File accesses may fail later.
317 * For nfs version 3, use the access rpc to check accessibility. If file modes
318 * are changed on the server, accesses might still fail later.
319 */
320static int
321nfs_access(struct vop_access_args *ap)
322{
323 struct vnode *vp = ap->a_vp;
324 int error = 0, i, gotahit;
325 u_int32_t mode, wmode, rmode;
326 int v34 = NFS_ISV34(vp);
327 struct nfsnode *np = VTONFS(vp);
328
329 /*
330 * Disallow write attempts on filesystems mounted read-only;
331 * unless the file is a socket, fifo, or a block or character
332 * device resident on the filesystem.
333 */
334 if ((ap->a_accmode & (VWRITE | VAPPEND
335#ifdef NFS4_ACL_EXTATTR_NAME
336 | VWRITE_NAMED_ATTRS | VDELETE_CHILD | VWRITE_ATTRIBUTES |
337 VDELETE | VWRITE_ACL | VWRITE_OWNER
338#endif
339 )) != 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) != 0) {
340 switch (vp->v_type) {
341 case VREG:
342 case VDIR:
343 case VLNK:
344 return (EROFS);
345 default:
346 break;
347 }
348 }
349 /*
350 * For nfs v3 or v4, check to see if we have done this recently, and if
351 * so return our cached result instead of making an ACCESS call.
352 * If not, do an access rpc, otherwise you are stuck emulating
353 * ufs_access() locally using the vattr. This may not be correct,
354 * since the server may apply other access criteria such as
355 * client uid-->server uid mapping that we do not know about.
356 */
357 if (v34) {
358 if (ap->a_accmode & VREAD)
359 mode = NFSACCESS_READ;
360 else
361 mode = 0;
362 if (vp->v_type != VDIR) {
363 if (ap->a_accmode & VWRITE)
364 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
365 if (ap->a_accmode & VAPPEND)
366 mode |= NFSACCESS_EXTEND;
367 if (ap->a_accmode & VEXEC)
368 mode |= NFSACCESS_EXECUTE;
369#ifdef NFS4_ACL_EXTATTR_NAME
370 if (ap->a_accmode & VDELETE)
371 mode |= NFSACCESS_DELETE;
372#endif
373 } else {
374 if (ap->a_accmode & VWRITE)
375 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
376 if (ap->a_accmode & VAPPEND)
377 mode |= NFSACCESS_EXTEND;
378 if (ap->a_accmode & VEXEC)
379 mode |= NFSACCESS_LOOKUP;
380#ifdef NFS4_ACL_EXTATTR_NAME
381 if (ap->a_accmode & VDELETE)
382 mode |= NFSACCESS_DELETE;
383 if (ap->a_accmode & VDELETE_CHILD)
384 mode |= NFSACCESS_MODIFY;
385#endif
386 }
387 /* XXX safety belt, only make blanket request if caching */
388 if (nfsaccess_cache_timeout > 0) {
389 wmode = NFSACCESS_READ | NFSACCESS_MODIFY |
390 NFSACCESS_EXTEND | NFSACCESS_EXECUTE |
391 NFSACCESS_DELETE | NFSACCESS_LOOKUP;
392 } else {
393 wmode = mode;
394 }
395
396 /*
397 * Does our cached result allow us to give a definite yes to
398 * this request?
399 */
400 gotahit = 0;
401 mtx_lock(&np->n_mtx);
402 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) {
403 if (ap->a_cred->cr_uid == np->n_accesscache[i].uid) {
404 if (time_second < (np->n_accesscache[i].stamp
405 + nfsaccess_cache_timeout) &&
406 (np->n_accesscache[i].mode & mode) == mode) {
407 NFSINCRGLOBAL(newnfsstats.accesscache_hits);
408 gotahit = 1;
409 }
410 break;
411 }
412 }
413 mtx_unlock(&np->n_mtx);
414 if (gotahit == 0) {
415 /*
416 * Either a no, or a don't know. Go to the wire.
417 */
418 NFSINCRGLOBAL(newnfsstats.accesscache_misses);
419 error = nfs34_access_otw(vp, wmode, ap->a_td,
420 ap->a_cred, &rmode);
421 if (!error &&
422 (rmode & mode) != mode)
423 error = EACCES;
424 }
425 return (error);
426 } else {
427 if ((error = nfsspec_access(ap)) != 0) {
428 return (error);
429 }
430 /*
431 * Attempt to prevent a mapped root from accessing a file
432 * which it shouldn't. We try to read a byte from the file
433 * if the user is root and the file is not zero length.
434 * After calling nfsspec_access, we should have the correct
435 * file size cached.
436 */
437 mtx_lock(&np->n_mtx);
438 if (ap->a_cred->cr_uid == 0 && (ap->a_accmode & VREAD)
439 && VTONFS(vp)->n_size > 0) {
440 struct iovec aiov;
441 struct uio auio;
442 char buf[1];
443
444 mtx_unlock(&np->n_mtx);
445 aiov.iov_base = buf;
446 aiov.iov_len = 1;
447 auio.uio_iov = &aiov;
448 auio.uio_iovcnt = 1;
449 auio.uio_offset = 0;
450 auio.uio_resid = 1;
451 auio.uio_segflg = UIO_SYSSPACE;
452 auio.uio_rw = UIO_READ;
453 auio.uio_td = ap->a_td;
454
455 if (vp->v_type == VREG)
456 error = ncl_readrpc(vp, &auio, ap->a_cred);
457 else if (vp->v_type == VDIR) {
458 char* bp;
459 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
460 aiov.iov_base = bp;
461 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
462 error = ncl_readdirrpc(vp, &auio, ap->a_cred,
463 ap->a_td);
464 free(bp, M_TEMP);
465 } else if (vp->v_type == VLNK)
466 error = ncl_readlinkrpc(vp, &auio, ap->a_cred);
467 else
468 error = EACCES;
469 } else
470 mtx_unlock(&np->n_mtx);
471 return (error);
472 }
473}
474
475
476/*
477 * nfs open vnode op
478 * Check to see if the type is ok
479 * and that deletion is not in progress.
480 * For paged in text files, you will need to flush the page cache
481 * if consistency is lost.
482 */
483/* ARGSUSED */
484static int
485nfs_open(struct vop_open_args *ap)
486{
487 struct vnode *vp = ap->a_vp;
488 struct nfsnode *np = VTONFS(vp);
489 struct vattr vattr;
490 int error;
491 int fmode = ap->a_mode;
492
493 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK)
494 return (EOPNOTSUPP);
495
496 /*
497 * For NFSv4, we need to do the Open Op before cache validation,
498 * so that we conform to RFC3530 Sec. 9.3.1.
499 */
500 if (NFS_ISV4(vp)) {
501 error = nfsrpc_open(vp, fmode, ap->a_cred, ap->a_td);
502 if (error) {
503 error = nfscl_maperr(ap->a_td, error, (uid_t)0,
504 (gid_t)0);
505 return (error);
506 }
507 }
508
509 /*
510 * Now, if this Open will be doing reading, re-validate/flush the
511 * cache, so that Close/Open coherency is maintained.
512 */
513 if ((fmode & FREAD) && (!NFS_ISV4(vp) || nfscl_mustflush(vp))) {
514 mtx_lock(&np->n_mtx);
515 if (np->n_flag & NMODIFIED) {
516 mtx_unlock(&np->n_mtx);
517 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
518 if (error == EINTR || error == EIO) {
519 if (NFS_ISV4(vp))
520 (void) nfsrpc_close(vp, 0, ap->a_td);
521 return (error);
522 }
523 np->n_attrstamp = 0;
524 if (vp->v_type == VDIR)
525 np->n_direofoffset = 0;
526 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
527 if (error) {
528 if (NFS_ISV4(vp))
529 (void) nfsrpc_close(vp, 0, ap->a_td);
530 return (error);
531 }
532 mtx_lock(&np->n_mtx);
533 np->n_mtime = vattr.va_mtime;
534 if (NFS_ISV4(vp))
535 np->n_change = vattr.va_filerev;
536 mtx_unlock(&np->n_mtx);
537 } else {
538 struct thread *td = curthread;
539
540 if (np->n_ac_ts_syscalls != td->td_syscalls ||
541 np->n_ac_ts_tid != td->td_tid ||
542 td->td_proc == NULL ||
543 np->n_ac_ts_pid != td->td_proc->p_pid) {
544 np->n_attrstamp = 0;
545 }
546 mtx_unlock(&np->n_mtx);
547 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
548 if (error) {
549 if (NFS_ISV4(vp))
550 (void) nfsrpc_close(vp, 0, ap->a_td);
551 return (error);
552 }
553 mtx_lock(&np->n_mtx);
554 if ((NFS_ISV4(vp) && np->n_change != vattr.va_filerev) ||
555 NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
556 if (vp->v_type == VDIR)
557 np->n_direofoffset = 0;
558 mtx_unlock(&np->n_mtx);
559 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
560 if (error == EINTR || error == EIO) {
561 if (NFS_ISV4(vp))
562 (void) nfsrpc_close(vp, 0,
563 ap->a_td);
564 return (error);
565 }
566 mtx_lock(&np->n_mtx);
567 np->n_mtime = vattr.va_mtime;
568 if (NFS_ISV4(vp))
569 np->n_change = vattr.va_filerev;
570 }
571 mtx_unlock(&np->n_mtx);
572 }
573 }
574
575 /*
576 * If the object has >= 1 O_DIRECT active opens, we disable caching.
577 */
578 if (newnfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) {
579 if (np->n_directio_opens == 0) {
580 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
581 if (error) {
582 if (NFS_ISV4(vp))
583 (void) nfsrpc_close(vp, 0, ap->a_td);
584 return (error);
585 }
586 mtx_lock(&np->n_mtx);
587 np->n_flag |= NNONCACHE;
588 } else {
589 mtx_lock(&np->n_mtx);
590 }
591 np->n_directio_opens++;
592 mtx_unlock(&np->n_mtx);
593 }
594 vnode_create_vobject(vp, vattr.va_size, ap->a_td);
595 return (0);
596}
597
598/*
599 * nfs close vnode op
600 * What an NFS client should do upon close after writing is a debatable issue.
601 * Most NFS clients push delayed writes to the server upon close, basically for
602 * two reasons:
603 * 1 - So that any write errors may be reported back to the client process
604 * doing the close system call. By far the two most likely errors are
605 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
606 * 2 - To put a worst case upper bound on cache inconsistency between
607 * multiple clients for the file.
608 * There is also a consistency problem for Version 2 of the protocol w.r.t.
609 * not being able to tell if other clients are writing a file concurrently,
610 * since there is no way of knowing if the changed modify time in the reply
611 * is only due to the write for this client.
612 * (NFS Version 3 provides weak cache consistency data in the reply that
613 * should be sufficient to detect and handle this case.)
614 *
615 * The current code does the following:
616 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
617 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
618 * or commit them (this satisfies 1 and 2 except for the
619 * case where the server crashes after this close but
620 * before the commit RPC, which is felt to be "good
621 * enough". Changing the last argument to ncl_flush() to
622 * a 1 would force a commit operation, if it is felt a
623 * commit is necessary now.
624 * for NFS Version 4 - flush the dirty buffers and commit them, if
625 * nfscl_mustflush() says this is necessary.
626 * It is necessary if there is no write delegation held,
627 * in order to satisfy open/close coherency.
628 * If the file isn't cached on local stable storage,
629 * it may be necessary in order to detect "out of space"
630 * errors from the server, if the write delegation
631 * issued by the server doesn't allow the file to grow.
632 */
633/* ARGSUSED */
634static int
635nfs_close(struct vop_close_args *ap)
636{
637 struct vnode *vp = ap->a_vp;
638 struct nfsnode *np = VTONFS(vp);
639 struct nfsvattr nfsva;
640 struct ucred *cred;
641 int error = 0, ret, localcred = 0;
642 int fmode = ap->a_fflag;
643
644 if ((vp->v_mount->mnt_kern_flag & MNTK_UNMOUNTF))
645 return (0);
646 /*
647 * During shutdown, a_cred isn't valid, so just use root.
648 */
649 if (ap->a_cred == NOCRED) {
650 cred = newnfs_getcred();
651 localcred = 1;
652 } else {
653 cred = ap->a_cred;
654 }
655 if (vp->v_type == VREG) {
656 /*
657 * Examine and clean dirty pages, regardless of NMODIFIED.
658 * This closes a major hole in close-to-open consistency.
659 * We want to push out all dirty pages (and buffers) on
660 * close, regardless of whether they were dirtied by
661 * mmap'ed writes or via write().
662 */
663 if (nfs_clean_pages_on_close && vp->v_object) {
664 VM_OBJECT_LOCK(vp->v_object);
665 vm_object_page_clean(vp->v_object, 0, 0, 0);
666 VM_OBJECT_UNLOCK(vp->v_object);
667 }
668 mtx_lock(&np->n_mtx);
669 if (np->n_flag & NMODIFIED) {
670 mtx_unlock(&np->n_mtx);
671 if (NFS_ISV3(vp)) {
672 /*
673 * Under NFSv3 we have dirty buffers to dispose of. We
674 * must flush them to the NFS server. We have the option
675 * of waiting all the way through the commit rpc or just
676 * waiting for the initial write. The default is to only
677 * wait through the initial write so the data is in the
678 * server's cache, which is roughly similar to the state
679 * a standard disk subsystem leaves the file in on close().
680 *
681 * We cannot clear the NMODIFIED bit in np->n_flag due to
682 * potential races with other processes, and certainly
683 * cannot clear it if we don't commit.
684 * These races occur when there is no longer the old
685 * traditional vnode locking implemented for Vnode Ops.
686 */
687 int cm = newnfs_commit_on_close ? 1 : 0;
688 error = ncl_flush(vp, MNT_WAIT, cred, ap->a_td, cm);
689 /* np->n_flag &= ~NMODIFIED; */
690 } else if (NFS_ISV4(vp)) {
691 if (nfscl_mustflush(vp)) {
692 int cm = newnfs_commit_on_close ? 1 : 0;
693 error = ncl_flush(vp, MNT_WAIT, cred, ap->a_td,
694 cm);
695 /*
696 * as above w.r.t races when clearing
697 * NMODIFIED.
698 * np->n_flag &= ~NMODIFIED;
699 */
700 }
701 } else
702 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
703 mtx_lock(&np->n_mtx);
704 }
705 /*
706 * Invalidate the attribute cache in all cases.
707 * An open is going to fetch fresh attrs any way, other procs
708 * on this node that have file open will be forced to do an
709 * otw attr fetch, but this is safe.
710 * --> A user found that their RPC count dropped by 20% when
711 * this was commented out and I can't see any requirement
712 * for it, so I've disabled it when negative lookups are
713 * enabled. (What does this have to do with negative lookup
714 * caching? Well nothing, except it was reported by the
715 * same user that needed negative lookup caching and I wanted
716 * there to be a way to disable it via sysctl to see if it
717 * is the cause of some caching/coherency issue that might
718 * crop up.)
719 */
720 if (newnfs_neglookup_enable == 0)
721 np->n_attrstamp = 0;
722 if (np->n_flag & NWRITEERR) {
723 np->n_flag &= ~NWRITEERR;
724 error = np->n_error;
725 }
726 mtx_unlock(&np->n_mtx);
727 }
728
729 if (NFS_ISV4(vp)) {
730 /*
731 * Get attributes so "change" is up to date.
732 */
733 if (!error) {
734 ret = nfsrpc_getattr(vp, cred, ap->a_td, &nfsva,
735 NULL);
736 if (!ret) {
737 np->n_change = nfsva.na_filerev;
738 (void) nfscl_loadattrcache(&vp, &nfsva, NULL,
739 NULL, 0, 0);
740 }
741 }
742
743 /*
744 * and do the close.
745 */
746 ret = nfsrpc_close(vp, 0, ap->a_td);
747 if (!error && ret)
748 error = ret;
749 if (error)
750 error = nfscl_maperr(ap->a_td, error, (uid_t)0,
751 (gid_t)0);
752 }
753 if (newnfs_directio_enable)
754 KASSERT((np->n_directio_asyncwr == 0),
755 ("nfs_close: dirty unflushed (%d) directio buffers\n",
756 np->n_directio_asyncwr));
757 if (newnfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) {
758 mtx_lock(&np->n_mtx);
759 KASSERT((np->n_directio_opens > 0),
760 ("nfs_close: unexpectedly value (0) of n_directio_opens\n"));
761 np->n_directio_opens--;
762 if (np->n_directio_opens == 0)
763 np->n_flag &= ~NNONCACHE;
764 mtx_unlock(&np->n_mtx);
765 }
766 if (localcred)
767 NFSFREECRED(cred);
768 return (error);
769}
770
771/*
772 * nfs getattr call from vfs.
773 */
774static int
775nfs_getattr(struct vop_getattr_args *ap)
776{
777 struct vnode *vp = ap->a_vp;
778 struct thread *td = curthread; /* XXX */
779 struct nfsnode *np = VTONFS(vp);
780 int error = 0;
781 struct nfsvattr nfsva;
782 struct vattr *vap = ap->a_vap;
783 struct vattr vattr;
784
785 /*
786 * Update local times for special files.
787 */
788 mtx_lock(&np->n_mtx);
789 if (np->n_flag & (NACC | NUPD))
790 np->n_flag |= NCHG;
791 mtx_unlock(&np->n_mtx);
792 /*
793 * First look in the cache.
794 */
795 if (ncl_getattrcache(vp, &vattr) == 0) {
796 vap->va_type = vattr.va_type;
797 vap->va_mode = vattr.va_mode;
798 vap->va_nlink = vattr.va_nlink;
799 vap->va_uid = vattr.va_uid;
800 vap->va_gid = vattr.va_gid;
801 vap->va_fsid = vattr.va_fsid;
802 vap->va_fileid = vattr.va_fileid;
803 vap->va_size = vattr.va_size;
804 vap->va_blocksize = vattr.va_blocksize;
805 vap->va_atime = vattr.va_atime;
806 vap->va_mtime = vattr.va_mtime;
807 vap->va_ctime = vattr.va_ctime;
808 vap->va_gen = vattr.va_gen;
809 vap->va_flags = vattr.va_flags;
810 vap->va_rdev = vattr.va_rdev;
811 vap->va_bytes = vattr.va_bytes;
812 vap->va_filerev = vattr.va_filerev;
813 /*
814 * Get the local modify time for the case of a write
815 * delegation.
816 */
817 nfscl_deleggetmodtime(vp, &vap->va_mtime);
818 return (0);
819 }
820
821 if (NFS_ISV34(vp) && nfs_prime_access_cache &&
822 nfsaccess_cache_timeout > 0) {
823 NFSINCRGLOBAL(newnfsstats.accesscache_misses);
824 nfs34_access_otw(vp, NFSACCESS_ALL, td, ap->a_cred, NULL);
825 if (ncl_getattrcache(vp, ap->a_vap) == 0) {
826 nfscl_deleggetmodtime(vp, &ap->a_vap->va_mtime);
827 return (0);
828 }
829 }
830 error = nfsrpc_getattr(vp, ap->a_cred, td, &nfsva, NULL);
831 if (!error)
832 error = nfscl_loadattrcache(&vp, &nfsva, vap, NULL, 0, 0);
833 if (!error) {
834 /*
835 * Get the local modify time for the case of a write
836 * delegation.
837 */
838 nfscl_deleggetmodtime(vp, &vap->va_mtime);
839 } else if (NFS_ISV4(vp)) {
840 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
841 }
842 return (error);
843}
844
845/*
846 * nfs setattr call.
847 */
848static int
849nfs_setattr(struct vop_setattr_args *ap)
850{
851 struct vnode *vp = ap->a_vp;
852 struct nfsnode *np = VTONFS(vp);
853 struct thread *td = curthread; /* XXX */
854 struct vattr *vap = ap->a_vap;
855 int error = 0;
856 u_quad_t tsize;
857
858#ifndef nolint
859 tsize = (u_quad_t)0;
860#endif
861
862 /*
863 * Setting of flags and marking of atimes are not supported.
864 */
865 if (vap->va_flags != VNOVAL)
866 return (EOPNOTSUPP);
867
868 /*
869 * Disallow write attempts if the filesystem is mounted read-only.
870 */
871 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
872 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
873 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
874 (vp->v_mount->mnt_flag & MNT_RDONLY))
875 return (EROFS);
876 if (vap->va_size != VNOVAL) {
877 switch (vp->v_type) {
878 case VDIR:
879 return (EISDIR);
880 case VCHR:
881 case VBLK:
882 case VSOCK:
883 case VFIFO:
884 if (vap->va_mtime.tv_sec == VNOVAL &&
885 vap->va_atime.tv_sec == VNOVAL &&
886 vap->va_mode == (mode_t)VNOVAL &&
887 vap->va_uid == (uid_t)VNOVAL &&
888 vap->va_gid == (gid_t)VNOVAL)
889 return (0);
890 vap->va_size = VNOVAL;
891 break;
892 default:
893 /*
894 * Disallow write attempts if the filesystem is
895 * mounted read-only.
896 */
897 if (vp->v_mount->mnt_flag & MNT_RDONLY)
898 return (EROFS);
899 /*
900 * We run vnode_pager_setsize() early (why?),
901 * we must set np->n_size now to avoid vinvalbuf
902 * V_SAVE races that might setsize a lower
903 * value.
904 */
905 mtx_lock(&np->n_mtx);
906 tsize = np->n_size;
907 mtx_unlock(&np->n_mtx);
908 error = ncl_meta_setsize(vp, ap->a_cred, td,
909 vap->va_size);
910 mtx_lock(&np->n_mtx);
911 if (np->n_flag & NMODIFIED) {
912 tsize = np->n_size;
913 mtx_unlock(&np->n_mtx);
914 if (vap->va_size == 0)
915 error = ncl_vinvalbuf(vp, 0, td, 1);
916 else
917 error = ncl_vinvalbuf(vp, V_SAVE, td, 1);
918 if (error) {
919 vnode_pager_setsize(vp, tsize);
920 return (error);
921 }
922 /*
923 * Call nfscl_delegmodtime() to set the modify time
924 * locally, as required.
925 */
926 nfscl_delegmodtime(vp);
927 } else
928 mtx_unlock(&np->n_mtx);
929 /*
930 * np->n_size has already been set to vap->va_size
931 * in ncl_meta_setsize(). We must set it again since
932 * nfs_loadattrcache() could be called through
933 * ncl_meta_setsize() and could modify np->n_size.
934 */
935 mtx_lock(&np->n_mtx);
936 np->n_vattr.na_size = np->n_size = vap->va_size;
937 mtx_unlock(&np->n_mtx);
938 };
939 } else {
940 mtx_lock(&np->n_mtx);
941 if ((vap->va_mtime.tv_sec != VNOVAL || vap->va_atime.tv_sec != VNOVAL) &&
942 (np->n_flag & NMODIFIED) && vp->v_type == VREG) {
943 mtx_unlock(&np->n_mtx);
944 if ((error = ncl_vinvalbuf(vp, V_SAVE, td, 1)) != 0 &&
945 (error == EINTR || error == EIO))
946 return (error);
947 } else
948 mtx_unlock(&np->n_mtx);
949 }
950 error = nfs_setattrrpc(vp, vap, ap->a_cred, td);
951 if (error && vap->va_size != VNOVAL) {
952 mtx_lock(&np->n_mtx);
953 np->n_size = np->n_vattr.na_size = tsize;
954 vnode_pager_setsize(vp, tsize);
955 mtx_unlock(&np->n_mtx);
956 }
957 return (error);
958}
959
960/*
961 * Do an nfs setattr rpc.
962 */
963static int
964nfs_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred,
965 struct thread *td)
966{
967 struct nfsnode *np = VTONFS(vp);
968 int error, ret, attrflag, i;
969 struct nfsvattr nfsva;
970
971 if (NFS_ISV34(vp)) {
972 mtx_lock(&np->n_mtx);
973 for (i = 0; i < NFS_ACCESSCACHESIZE; i++)
974 np->n_accesscache[i].stamp = 0;
975 np->n_flag |= NDELEGMOD;
976 mtx_unlock(&np->n_mtx);
977 }
978 error = nfsrpc_setattr(vp, vap, NULL, cred, td, &nfsva, &attrflag,
979 NULL);
980 if (attrflag) {
981 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
982 if (ret && !error)
983 error = ret;
984 }
985 if (error && NFS_ISV4(vp))
986 error = nfscl_maperr(td, error, vap->va_uid, vap->va_gid);
987 return (error);
988}
989
990/*
991 * nfs lookup call, one step at a time...
992 * First look in cache
993 * If not found, unlock the directory nfsnode and do the rpc
994 */
995static int
996nfs_lookup(struct vop_lookup_args *ap)
997{
998 struct componentname *cnp = ap->a_cnp;
999 struct vnode *dvp = ap->a_dvp;
1000 struct vnode **vpp = ap->a_vpp;
1001 struct mount *mp = dvp->v_mount;
1002 int flags = cnp->cn_flags;
1003 struct vnode *newvp;
1004 struct nfsmount *nmp;
1005 struct nfsnode *np;
1006 int error = 0, attrflag, dattrflag, ltype;
1007 struct thread *td = cnp->cn_thread;
1008 struct nfsfh *nfhp;
1009 struct nfsvattr dnfsva, nfsva;
1010
1011 *vpp = NULLVP;
1012 if ((flags & ISLASTCN) && (mp->mnt_flag & MNT_RDONLY) &&
1013 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
1014 return (EROFS);
1015 if (dvp->v_type != VDIR)
1016 return (ENOTDIR);
1017 nmp = VFSTONFS(mp);
1018 np = VTONFS(dvp);
1019
1020 /* For NFSv4, wait until any remove is done. */
1021 mtx_lock(&np->n_mtx);
1022 while (NFSHASNFSV4(nmp) && (np->n_flag & NREMOVEINPROG)) {
1023 np->n_flag |= NREMOVEWANT;
1024 (void) msleep((caddr_t)np, &np->n_mtx, PZERO, "nfslkup", 0);
1025 }
1026 mtx_unlock(&np->n_mtx);
1027
1028 if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0)
1029 return (error);
1030 if ((error = cache_lookup(dvp, vpp, cnp)) &&
1031 (error != ENOENT || newnfs_neglookup_enable != 0)) {
1032 struct vattr vattr;
1033
1034 if (error == ENOENT) {
1035 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred) &&
1036 vattr.va_mtime.tv_sec == np->n_dmtime) {
1037 NFSINCRGLOBAL(newnfsstats.lookupcache_hits);
1038 return (ENOENT);
1039 }
1040 cache_purge_negative(dvp);
1041 np->n_dmtime = 0;
1042 } else {
1043 newvp = *vpp;
1044 if (nfscl_nodeleg(newvp, 0) == 0 ||
1045 (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred) &&
1046 vattr.va_ctime.tv_sec==VTONFS(newvp)->n_ctime)) {
1047 NFSINCRGLOBAL(newnfsstats.lookupcache_hits);
1048 if (cnp->cn_nameiop != LOOKUP &&
1049 (flags & ISLASTCN))
1050 cnp->cn_flags |= SAVENAME;
1051 return (0);
1052 }
1053 cache_purge(newvp);
1054 if (dvp != newvp)
1055 vput(newvp);
1056 else
1057 vrele(newvp);
1058 *vpp = NULLVP;
1059 }
1060 }
1061 error = 0;
1062 newvp = NULLVP;
1063 NFSINCRGLOBAL(newnfsstats.lookupcache_misses);
1064 error = nfsrpc_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1065 cnp->cn_cred, td, &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1066 NULL);
1067 if (dattrflag)
1068 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1069 if (error) {
1070 if (newnfs_neglookup_enable != 0 &&
1071 error == ENOENT && (cnp->cn_flags & MAKEENTRY) &&
1072 cnp->cn_nameiop != CREATE) {
1073 if (np->n_dmtime == 0)
1074 np->n_dmtime = np->n_vattr.na_mtime.tv_sec;
1075 cache_enter(dvp, NULL, cnp);
1076 }
1077 if (newvp != NULLVP) {
1078 vput(newvp);
1079 *vpp = NULLVP;
1080 }
1081 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) &&
1082 (flags & ISLASTCN) && error == ENOENT) {
1083 if (mp->mnt_flag & MNT_RDONLY)
1084 error = EROFS;
1085 else
1086 error = EJUSTRETURN;
1087 }
1088 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
1089 cnp->cn_flags |= SAVENAME;
1090 if (NFS_ISV4(dvp))
1091 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1092 return (error);
1093 }
1094
1095 /*
1096 * Handle RENAME case...
1097 */
1098 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) {
1099 if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) {
1100 FREE((caddr_t)nfhp, M_NFSFH);
1101 return (EISDIR);
1102 }
1103 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL);
1104 if (error)
1105 return (error);
1106 newvp = NFSTOV(np);
1107 if (attrflag)
1108 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1109 0, 1);
1110 *vpp = newvp;
1111 cnp->cn_flags |= SAVENAME;
1112 return (0);
1113 }
1114
1115 if (flags & ISDOTDOT) {
1116 ltype = VOP_ISLOCKED(dvp);
1117 error = vfs_busy(mp, MBF_NOWAIT);
1118 if (error != 0) {
1119 vfs_ref(mp);
1120 VOP_UNLOCK(dvp, 0);
1121 error = vfs_busy(mp, 0);
1122 vn_lock(dvp, ltype | LK_RETRY);
1123 vfs_rel(mp);
1124 if (error == 0 && (dvp->v_iflag & VI_DOOMED)) {
1125 vfs_unbusy(mp);
1126 error = ENOENT;
1127 }
1128 if (error != 0)
1129 return (error);
1130 }
1131 VOP_UNLOCK(dvp, 0);
1132 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL);
1133 if (error == 0)
1134 newvp = NFSTOV(np);
1135 vfs_unbusy(mp);
1136 if (newvp != dvp)
1137 vn_lock(dvp, ltype | LK_RETRY);
1138 if (dvp->v_iflag & VI_DOOMED) {
1139 if (error == 0) {
1140 if (newvp == dvp)
1141 vrele(newvp);
1142 else
1143 vput(newvp);
1144 }
1145 error = ENOENT;
1146 }
1147 if (error != 0)
1148 return (error);
1149 if (attrflag)
1150 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1151 0, 1);
1152 } else if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) {
1153 FREE((caddr_t)nfhp, M_NFSFH);
1154 VREF(dvp);
1155 newvp = dvp;
1156 if (attrflag)
1157 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1158 0, 1);
1159 } else {
1160 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL);
1161 if (error)
1162 return (error);
1163 newvp = NFSTOV(np);
1164 if (attrflag)
1165 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1166 0, 1);
1167 }
1168 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
1169 cnp->cn_flags |= SAVENAME;
1170 if ((cnp->cn_flags & MAKEENTRY) &&
1171 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) {
1172 np->n_ctime = np->n_vattr.na_vattr.va_ctime.tv_sec;
1173 cache_enter(dvp, newvp, cnp);
1174 }
1175 *vpp = newvp;
1176 return (0);
1177}
1178
1179/*
1180 * nfs read call.
1181 * Just call ncl_bioread() to do the work.
1182 */
1183static int
1184nfs_read(struct vop_read_args *ap)
1185{
1186 struct vnode *vp = ap->a_vp;
1187
1188 switch (vp->v_type) {
1189 case VREG:
1190 return (ncl_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred));
1191 case VDIR:
1192 return (EISDIR);
1193 default:
1194 return (EOPNOTSUPP);
1195 }
1196}
1197
1198/*
1199 * nfs readlink call
1200 */
1201static int
1202nfs_readlink(struct vop_readlink_args *ap)
1203{
1204 struct vnode *vp = ap->a_vp;
1205
1206 if (vp->v_type != VLNK)
1207 return (EINVAL);
1208 return (ncl_bioread(vp, ap->a_uio, 0, ap->a_cred));
1209}
1210
1211/*
1212 * Do a readlink rpc.
1213 * Called by ncl_doio() from below the buffer cache.
1214 */
1215int
1216ncl_readlinkrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1217{
1218 int error, ret, attrflag;
1219 struct nfsvattr nfsva;
1220
1221 error = nfsrpc_readlink(vp, uiop, cred, uiop->uio_td, &nfsva,
1222 &attrflag, NULL);
1223 if (attrflag) {
1224 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1225 if (ret && !error)
1226 error = ret;
1227 }
1228 if (error && NFS_ISV4(vp))
1229 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1230 return (error);
1231}
1232
1233/*
1234 * nfs read rpc call
1235 * Ditto above
1236 */
1237int
1238ncl_readrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1239{
1240 int error, ret, attrflag;
1241 struct nfsvattr nfsva;
1242
1243 error = nfsrpc_read(vp, uiop, cred, uiop->uio_td, &nfsva, &attrflag,
1244 NULL);
1245 if (attrflag) {
1246 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1247 if (ret && !error)
1248 error = ret;
1249 }
1250 if (error && NFS_ISV4(vp))
1251 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1252 return (error);
1253}
1254
1255/*
1256 * nfs write call
1257 */
1258int
1259ncl_writerpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
1260 int *iomode, int *must_commit)
1261{
1262 struct nfsvattr nfsva;
1263 int error = 0, attrflag, ret;
1264 u_char verf[NFSX_VERF];
1265 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1266
1267 *must_commit = 0;
1268 error = nfsrpc_write(vp, uiop, iomode, verf, cred,
1269 uiop->uio_td, &nfsva, &attrflag, NULL);
1270 NFSLOCKMNT(nmp);
1271 if (!error && NFSHASWRITEVERF(nmp) &&
1272 NFSBCMP(verf, nmp->nm_verf, NFSX_VERF)) {
1273 *must_commit = 1;
1274 NFSBCOPY(verf, nmp->nm_verf, NFSX_VERF);
1275 }
1276 NFSUNLOCKMNT(nmp);
1277 if (attrflag) {
1278 if (VTONFS(vp)->n_flag & ND_NFSV4)
1279 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 1,
1280 1);
1281 else
1282 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
1283 1);
1284 if (ret && !error)
1285 error = ret;
1286 }
1287 if (vp->v_mount->mnt_kern_flag & MNTK_ASYNC)
1288 *iomode = NFSWRITE_FILESYNC;
1289 if (error && NFS_ISV4(vp))
1290 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1291 return (error);
1292}
1293
1294/*
1295 * nfs mknod rpc
1296 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1297 * mode set to specify the file type and the size field for rdev.
1298 */
1299static int
1300nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1301 struct vattr *vap)
1302{
1303 struct nfsvattr nfsva, dnfsva;
1304 struct vnode *newvp = NULL;
1305 struct nfsnode *np = NULL, *dnp;
1306 struct nfsfh *nfhp;
1307 struct vattr vattr;
1308 int error = 0, attrflag, dattrflag;
1309 u_int32_t rdev;
1310
1311 if (vap->va_type == VCHR || vap->va_type == VBLK)
1312 rdev = vap->va_rdev;
1313 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1314 rdev = 0xffffffff;
1315 else
1316 return (EOPNOTSUPP);
1317 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1318 return (error);
1319 error = nfsrpc_mknod(dvp, cnp->cn_nameptr, cnp->cn_namelen, vap,
1320 rdev, vap->va_type, cnp->cn_cred, cnp->cn_thread, &dnfsva,
1321 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
1322 if (!error) {
1323 if (!nfhp)
1324 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
1325 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread,
1326 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1327 NULL);
1328 if (nfhp)
1329 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
1330 cnp->cn_thread, &np, NULL);
1331 }
1332 if (dattrflag)
1333 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1334 if (!error) {
1335 newvp = NFSTOV(np);
1336 if (attrflag)
1337 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1338 0, 1);
1339 }
1340 if (!error) {
1341 if ((cnp->cn_flags & MAKEENTRY))
1342 cache_enter(dvp, newvp, cnp);
1343 *vpp = newvp;
1344 } else if (NFS_ISV4(dvp)) {
1345 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1346 vap->va_gid);
1347 }
1348 dnp = VTONFS(dvp);
1349 mtx_lock(&dnp->n_mtx);
1350 dnp->n_flag |= NMODIFIED;
1351 if (!dattrflag)
1352 dnp->n_attrstamp = 0;
1353 mtx_unlock(&dnp->n_mtx);
1354 return (error);
1355}
1356
1357/*
1358 * nfs mknod vop
1359 * just call nfs_mknodrpc() to do the work.
1360 */
1361/* ARGSUSED */
1362static int
1363nfs_mknod(struct vop_mknod_args *ap)
1364{
1365 return (nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap));
1366}
1367
1368static u_long create_verf;
1369/*
1370 * nfs file create call
1371 */
1372static int
1373nfs_create(struct vop_create_args *ap)
1374{
1375 struct vnode *dvp = ap->a_dvp;
1376 struct vattr *vap = ap->a_vap;
1377 struct componentname *cnp = ap->a_cnp;
1378 struct nfsnode *np = NULL, *dnp;
1379 struct vnode *newvp = NULL;
1380 struct nfsmount *nmp;
1381 struct nfsvattr dnfsva, nfsva;
1382 struct nfsfh *nfhp;
1383 nfsquad_t cverf;
1384 int error = 0, attrflag, dattrflag, fmode = 0;
1385 struct vattr vattr;
1386
1387 /*
1388 * Oops, not for me..
1389 */
1390 if (vap->va_type == VSOCK)
1391 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1392
1393 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1394 return (error);
1395 if (vap->va_vaflags & VA_EXCLUSIVE)
1396 fmode |= O_EXCL;
1397 dnp = VTONFS(dvp);
1398 nmp = VFSTONFS(vnode_mount(dvp));
1399again:
1400 /* For NFSv4, wait until any remove is done. */
1401 mtx_lock(&dnp->n_mtx);
1402 while (NFSHASNFSV4(nmp) && (dnp->n_flag & NREMOVEINPROG)) {
1403 dnp->n_flag |= NREMOVEWANT;
1404 (void) msleep((caddr_t)dnp, &dnp->n_mtx, PZERO, "nfscrt", 0);
1405 }
1406 mtx_unlock(&dnp->n_mtx);
1407
| 37
38/*
39 * vnode op calls for Sun NFS version 2, 3 and 4
40 */
41
42#include "opt_inet.h"
43
44#include <sys/param.h>
45#include <sys/kernel.h>
46#include <sys/systm.h>
47#include <sys/resourcevar.h>
48#include <sys/proc.h>
49#include <sys/mount.h>
50#include <sys/bio.h>
51#include <sys/buf.h>
52#include <sys/jail.h>
53#include <sys/malloc.h>
54#include <sys/mbuf.h>
55#include <sys/namei.h>
56#include <sys/socket.h>
57#include <sys/vnode.h>
58#include <sys/dirent.h>
59#include <sys/fcntl.h>
60#include <sys/lockf.h>
61#include <sys/stat.h>
62#include <sys/sysctl.h>
63#include <sys/signalvar.h>
64
65#include <vm/vm.h>
66#include <vm/vm_object.h>
67#include <vm/vm_extern.h>
68#include <vm/vm_object.h>
69
70
71#include <fs/nfs/nfsport.h>
72#include <fs/nfsclient/nfsnode.h>
73#include <fs/nfsclient/nfsmount.h>
74#include <fs/nfsclient/nfs.h>
75#include <fs/nfsclient/nfs_lock.h>
76
77#include <net/if.h>
78#include <netinet/in.h>
79#include <netinet/in_var.h>
80
81/* Defs */
82#define TRUE 1
83#define FALSE 0
84
85extern struct nfsstats newnfsstats;
86MALLOC_DECLARE(M_NEWNFSREQ);
87vop_advlock_t *ncl_advlock_p = ncl_dolock;
88
89/*
90 * Ifdef for FreeBSD-current merged buffer cache. It is unfortunate that these
91 * calls are not in getblk() and brelse() so that they would not be necessary
92 * here.
93 */
94#ifndef B_VMIO
95#define vfs_busy_pages(bp, f)
96#endif
97
98static vop_read_t nfsfifo_read;
99static vop_write_t nfsfifo_write;
100static vop_close_t nfsfifo_close;
101static int nfs_setattrrpc(struct vnode *, struct vattr *, struct ucred *,
102 struct thread *);
103static vop_lookup_t nfs_lookup;
104static vop_create_t nfs_create;
105static vop_mknod_t nfs_mknod;
106static vop_open_t nfs_open;
107static vop_close_t nfs_close;
108static vop_access_t nfs_access;
109static vop_getattr_t nfs_getattr;
110static vop_setattr_t nfs_setattr;
111static vop_read_t nfs_read;
112static vop_fsync_t nfs_fsync;
113static vop_remove_t nfs_remove;
114static vop_link_t nfs_link;
115static vop_rename_t nfs_rename;
116static vop_mkdir_t nfs_mkdir;
117static vop_rmdir_t nfs_rmdir;
118static vop_symlink_t nfs_symlink;
119static vop_readdir_t nfs_readdir;
120static vop_strategy_t nfs_strategy;
121static vop_lock1_t nfs_lock1;
122static int nfs_lookitup(struct vnode *, char *, int,
123 struct ucred *, struct thread *, struct nfsnode **);
124static int nfs_sillyrename(struct vnode *, struct vnode *,
125 struct componentname *);
126static vop_access_t nfsspec_access;
127static vop_readlink_t nfs_readlink;
128static vop_print_t nfs_print;
129static vop_advlock_t nfs_advlock;
130static vop_advlockasync_t nfs_advlockasync;
131#ifdef NFS4_ACL_EXTATTR_NAME
132static vop_getacl_t nfs_getacl;
133static vop_setacl_t nfs_setacl;
134#endif
135
136/*
137 * Global vfs data structures for nfs
138 */
139struct vop_vector newnfs_vnodeops = {
140 .vop_default = &default_vnodeops,
141 .vop_access = nfs_access,
142 .vop_advlock = nfs_advlock,
143 .vop_advlockasync = nfs_advlockasync,
144 .vop_close = nfs_close,
145 .vop_create = nfs_create,
146 .vop_fsync = nfs_fsync,
147 .vop_getattr = nfs_getattr,
148 .vop_getpages = ncl_getpages,
149 .vop_putpages = ncl_putpages,
150 .vop_inactive = ncl_inactive,
151 .vop_link = nfs_link,
152 .vop_lock1 = nfs_lock1,
153 .vop_lookup = nfs_lookup,
154 .vop_mkdir = nfs_mkdir,
155 .vop_mknod = nfs_mknod,
156 .vop_open = nfs_open,
157 .vop_print = nfs_print,
158 .vop_read = nfs_read,
159 .vop_readdir = nfs_readdir,
160 .vop_readlink = nfs_readlink,
161 .vop_reclaim = ncl_reclaim,
162 .vop_remove = nfs_remove,
163 .vop_rename = nfs_rename,
164 .vop_rmdir = nfs_rmdir,
165 .vop_setattr = nfs_setattr,
166 .vop_strategy = nfs_strategy,
167 .vop_symlink = nfs_symlink,
168 .vop_write = ncl_write,
169#ifdef NFS4_ACL_EXTATTR_NAME
170 .vop_getacl = nfs_getacl,
171 .vop_setacl = nfs_setacl,
172#endif
173};
174
175struct vop_vector newnfs_fifoops = {
176 .vop_default = &fifo_specops,
177 .vop_access = nfsspec_access,
178 .vop_close = nfsfifo_close,
179 .vop_fsync = nfs_fsync,
180 .vop_getattr = nfs_getattr,
181 .vop_inactive = ncl_inactive,
182 .vop_print = nfs_print,
183 .vop_read = nfsfifo_read,
184 .vop_reclaim = ncl_reclaim,
185 .vop_setattr = nfs_setattr,
186 .vop_write = nfsfifo_write,
187};
188
189static int nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp,
190 struct componentname *cnp, struct vattr *vap);
191static int nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
192 int namelen, struct ucred *cred, struct thread *td);
193static int nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp,
194 char *fnameptr, int fnamelen, struct vnode *tdvp, struct vnode *tvp,
195 char *tnameptr, int tnamelen, struct ucred *cred, struct thread *td);
196static int nfs_renameit(struct vnode *sdvp, struct vnode *svp,
197 struct componentname *scnp, struct sillyrename *sp);
198
199/*
200 * Global variables
201 */
202#define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1))
203
204SYSCTL_DECL(_vfs_newnfs);
205
206static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO;
207SYSCTL_INT(_vfs_newnfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
208 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
209
210static int nfs_prime_access_cache = 0;
211SYSCTL_INT(_vfs_newnfs, OID_AUTO, prime_access_cache, CTLFLAG_RW,
212 &nfs_prime_access_cache, 0,
213 "Prime NFS ACCESS cache when fetching attributes");
214
215static int newnfs_commit_on_close = 0;
216SYSCTL_INT(_vfs_newnfs, OID_AUTO, commit_on_close, CTLFLAG_RW,
217 &newnfs_commit_on_close, 0, "write+commit on close, else only write");
218
219static int nfs_clean_pages_on_close = 1;
220SYSCTL_INT(_vfs_newnfs, OID_AUTO, clean_pages_on_close, CTLFLAG_RW,
221 &nfs_clean_pages_on_close, 0, "NFS clean dirty pages on close");
222
223int newnfs_directio_enable = 0;
224SYSCTL_INT(_vfs_newnfs, OID_AUTO, directio_enable, CTLFLAG_RW,
225 &newnfs_directio_enable, 0, "Enable NFS directio");
226
227static int newnfs_neglookup_enable = 1;
228SYSCTL_INT(_vfs_newnfs, OID_AUTO, neglookup_enable, CTLFLAG_RW,
229 &newnfs_neglookup_enable, 0, "Enable NFS negative lookup caching");
230
231/*
232 * This sysctl allows other processes to mmap a file that has been opened
233 * O_DIRECT by a process. In general, having processes mmap the file while
234 * Direct IO is in progress can lead to Data Inconsistencies. But, we allow
235 * this by default to prevent DoS attacks - to prevent a malicious user from
236 * opening up files O_DIRECT preventing other users from mmap'ing these
237 * files. "Protected" environments where stricter consistency guarantees are
238 * required can disable this knob. The process that opened the file O_DIRECT
239 * cannot mmap() the file, because mmap'ed IO on an O_DIRECT open() is not
240 * meaningful.
241 */
242int newnfs_directio_allow_mmap = 1;
243SYSCTL_INT(_vfs_newnfs, OID_AUTO, directio_allow_mmap, CTLFLAG_RW,
244 &newnfs_directio_allow_mmap, 0, "Enable mmaped IO on file with O_DIRECT opens");
245
246#if 0
247SYSCTL_INT(_vfs_newnfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
248 &newnfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
249
250SYSCTL_INT(_vfs_newnfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
251 &newnfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
252#endif
253
254#define NFSACCESS_ALL (NFSACCESS_READ | NFSACCESS_MODIFY \
255 | NFSACCESS_EXTEND | NFSACCESS_EXECUTE \
256 | NFSACCESS_DELETE | NFSACCESS_LOOKUP)
257
258/*
259 * SMP Locking Note :
260 * The list of locks after the description of the lock is the ordering
261 * of other locks acquired with the lock held.
262 * np->n_mtx : Protects the fields in the nfsnode.
263 VM Object Lock
264 VI_MTX (acquired indirectly)
265 * nmp->nm_mtx : Protects the fields in the nfsmount.
266 rep->r_mtx
267 * ncl_iod_mutex : Global lock, protects shared nfsiod state.
268 * nfs_reqq_mtx : Global lock, protects the nfs_reqq list.
269 nmp->nm_mtx
270 rep->r_mtx
271 * rep->r_mtx : Protects the fields in an nfsreq.
272 */
273
274static int
275nfs34_access_otw(struct vnode *vp, int wmode, struct thread *td,
276 struct ucred *cred, u_int32_t *retmode)
277{
278 int error = 0, attrflag, i, lrupos;
279 u_int32_t rmode;
280 struct nfsnode *np = VTONFS(vp);
281 struct nfsvattr nfsva;
282
283 error = nfsrpc_accessrpc(vp, wmode, cred, td, &nfsva, &attrflag,
284 &rmode, NULL);
285 if (attrflag)
286 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
287 if (!error) {
288 lrupos = 0;
289 mtx_lock(&np->n_mtx);
290 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) {
291 if (np->n_accesscache[i].uid == cred->cr_uid) {
292 np->n_accesscache[i].mode = rmode;
293 np->n_accesscache[i].stamp = time_second;
294 break;
295 }
296 if (i > 0 && np->n_accesscache[i].stamp <
297 np->n_accesscache[lrupos].stamp)
298 lrupos = i;
299 }
300 if (i == NFS_ACCESSCACHESIZE) {
301 np->n_accesscache[lrupos].uid = cred->cr_uid;
302 np->n_accesscache[lrupos].mode = rmode;
303 np->n_accesscache[lrupos].stamp = time_second;
304 }
305 mtx_unlock(&np->n_mtx);
306 if (retmode != NULL)
307 *retmode = rmode;
308 } else if (NFS_ISV4(vp)) {
309 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
310 }
311 return (error);
312}
313
314/*
315 * nfs access vnode op.
316 * For nfs version 2, just return ok. File accesses may fail later.
317 * For nfs version 3, use the access rpc to check accessibility. If file modes
318 * are changed on the server, accesses might still fail later.
319 */
320static int
321nfs_access(struct vop_access_args *ap)
322{
323 struct vnode *vp = ap->a_vp;
324 int error = 0, i, gotahit;
325 u_int32_t mode, wmode, rmode;
326 int v34 = NFS_ISV34(vp);
327 struct nfsnode *np = VTONFS(vp);
328
329 /*
330 * Disallow write attempts on filesystems mounted read-only;
331 * unless the file is a socket, fifo, or a block or character
332 * device resident on the filesystem.
333 */
334 if ((ap->a_accmode & (VWRITE | VAPPEND
335#ifdef NFS4_ACL_EXTATTR_NAME
336 | VWRITE_NAMED_ATTRS | VDELETE_CHILD | VWRITE_ATTRIBUTES |
337 VDELETE | VWRITE_ACL | VWRITE_OWNER
338#endif
339 )) != 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) != 0) {
340 switch (vp->v_type) {
341 case VREG:
342 case VDIR:
343 case VLNK:
344 return (EROFS);
345 default:
346 break;
347 }
348 }
349 /*
350 * For nfs v3 or v4, check to see if we have done this recently, and if
351 * so return our cached result instead of making an ACCESS call.
352 * If not, do an access rpc, otherwise you are stuck emulating
353 * ufs_access() locally using the vattr. This may not be correct,
354 * since the server may apply other access criteria such as
355 * client uid-->server uid mapping that we do not know about.
356 */
357 if (v34) {
358 if (ap->a_accmode & VREAD)
359 mode = NFSACCESS_READ;
360 else
361 mode = 0;
362 if (vp->v_type != VDIR) {
363 if (ap->a_accmode & VWRITE)
364 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
365 if (ap->a_accmode & VAPPEND)
366 mode |= NFSACCESS_EXTEND;
367 if (ap->a_accmode & VEXEC)
368 mode |= NFSACCESS_EXECUTE;
369#ifdef NFS4_ACL_EXTATTR_NAME
370 if (ap->a_accmode & VDELETE)
371 mode |= NFSACCESS_DELETE;
372#endif
373 } else {
374 if (ap->a_accmode & VWRITE)
375 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
376 if (ap->a_accmode & VAPPEND)
377 mode |= NFSACCESS_EXTEND;
378 if (ap->a_accmode & VEXEC)
379 mode |= NFSACCESS_LOOKUP;
380#ifdef NFS4_ACL_EXTATTR_NAME
381 if (ap->a_accmode & VDELETE)
382 mode |= NFSACCESS_DELETE;
383 if (ap->a_accmode & VDELETE_CHILD)
384 mode |= NFSACCESS_MODIFY;
385#endif
386 }
387 /* XXX safety belt, only make blanket request if caching */
388 if (nfsaccess_cache_timeout > 0) {
389 wmode = NFSACCESS_READ | NFSACCESS_MODIFY |
390 NFSACCESS_EXTEND | NFSACCESS_EXECUTE |
391 NFSACCESS_DELETE | NFSACCESS_LOOKUP;
392 } else {
393 wmode = mode;
394 }
395
396 /*
397 * Does our cached result allow us to give a definite yes to
398 * this request?
399 */
400 gotahit = 0;
401 mtx_lock(&np->n_mtx);
402 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) {
403 if (ap->a_cred->cr_uid == np->n_accesscache[i].uid) {
404 if (time_second < (np->n_accesscache[i].stamp
405 + nfsaccess_cache_timeout) &&
406 (np->n_accesscache[i].mode & mode) == mode) {
407 NFSINCRGLOBAL(newnfsstats.accesscache_hits);
408 gotahit = 1;
409 }
410 break;
411 }
412 }
413 mtx_unlock(&np->n_mtx);
414 if (gotahit == 0) {
415 /*
416 * Either a no, or a don't know. Go to the wire.
417 */
418 NFSINCRGLOBAL(newnfsstats.accesscache_misses);
419 error = nfs34_access_otw(vp, wmode, ap->a_td,
420 ap->a_cred, &rmode);
421 if (!error &&
422 (rmode & mode) != mode)
423 error = EACCES;
424 }
425 return (error);
426 } else {
427 if ((error = nfsspec_access(ap)) != 0) {
428 return (error);
429 }
430 /*
431 * Attempt to prevent a mapped root from accessing a file
432 * which it shouldn't. We try to read a byte from the file
433 * if the user is root and the file is not zero length.
434 * After calling nfsspec_access, we should have the correct
435 * file size cached.
436 */
437 mtx_lock(&np->n_mtx);
438 if (ap->a_cred->cr_uid == 0 && (ap->a_accmode & VREAD)
439 && VTONFS(vp)->n_size > 0) {
440 struct iovec aiov;
441 struct uio auio;
442 char buf[1];
443
444 mtx_unlock(&np->n_mtx);
445 aiov.iov_base = buf;
446 aiov.iov_len = 1;
447 auio.uio_iov = &aiov;
448 auio.uio_iovcnt = 1;
449 auio.uio_offset = 0;
450 auio.uio_resid = 1;
451 auio.uio_segflg = UIO_SYSSPACE;
452 auio.uio_rw = UIO_READ;
453 auio.uio_td = ap->a_td;
454
455 if (vp->v_type == VREG)
456 error = ncl_readrpc(vp, &auio, ap->a_cred);
457 else if (vp->v_type == VDIR) {
458 char* bp;
459 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
460 aiov.iov_base = bp;
461 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
462 error = ncl_readdirrpc(vp, &auio, ap->a_cred,
463 ap->a_td);
464 free(bp, M_TEMP);
465 } else if (vp->v_type == VLNK)
466 error = ncl_readlinkrpc(vp, &auio, ap->a_cred);
467 else
468 error = EACCES;
469 } else
470 mtx_unlock(&np->n_mtx);
471 return (error);
472 }
473}
474
475
476/*
477 * nfs open vnode op
478 * Check to see if the type is ok
479 * and that deletion is not in progress.
480 * For paged in text files, you will need to flush the page cache
481 * if consistency is lost.
482 */
483/* ARGSUSED */
484static int
485nfs_open(struct vop_open_args *ap)
486{
487 struct vnode *vp = ap->a_vp;
488 struct nfsnode *np = VTONFS(vp);
489 struct vattr vattr;
490 int error;
491 int fmode = ap->a_mode;
492
493 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK)
494 return (EOPNOTSUPP);
495
496 /*
497 * For NFSv4, we need to do the Open Op before cache validation,
498 * so that we conform to RFC3530 Sec. 9.3.1.
499 */
500 if (NFS_ISV4(vp)) {
501 error = nfsrpc_open(vp, fmode, ap->a_cred, ap->a_td);
502 if (error) {
503 error = nfscl_maperr(ap->a_td, error, (uid_t)0,
504 (gid_t)0);
505 return (error);
506 }
507 }
508
509 /*
510 * Now, if this Open will be doing reading, re-validate/flush the
511 * cache, so that Close/Open coherency is maintained.
512 */
513 if ((fmode & FREAD) && (!NFS_ISV4(vp) || nfscl_mustflush(vp))) {
514 mtx_lock(&np->n_mtx);
515 if (np->n_flag & NMODIFIED) {
516 mtx_unlock(&np->n_mtx);
517 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
518 if (error == EINTR || error == EIO) {
519 if (NFS_ISV4(vp))
520 (void) nfsrpc_close(vp, 0, ap->a_td);
521 return (error);
522 }
523 np->n_attrstamp = 0;
524 if (vp->v_type == VDIR)
525 np->n_direofoffset = 0;
526 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
527 if (error) {
528 if (NFS_ISV4(vp))
529 (void) nfsrpc_close(vp, 0, ap->a_td);
530 return (error);
531 }
532 mtx_lock(&np->n_mtx);
533 np->n_mtime = vattr.va_mtime;
534 if (NFS_ISV4(vp))
535 np->n_change = vattr.va_filerev;
536 mtx_unlock(&np->n_mtx);
537 } else {
538 struct thread *td = curthread;
539
540 if (np->n_ac_ts_syscalls != td->td_syscalls ||
541 np->n_ac_ts_tid != td->td_tid ||
542 td->td_proc == NULL ||
543 np->n_ac_ts_pid != td->td_proc->p_pid) {
544 np->n_attrstamp = 0;
545 }
546 mtx_unlock(&np->n_mtx);
547 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
548 if (error) {
549 if (NFS_ISV4(vp))
550 (void) nfsrpc_close(vp, 0, ap->a_td);
551 return (error);
552 }
553 mtx_lock(&np->n_mtx);
554 if ((NFS_ISV4(vp) && np->n_change != vattr.va_filerev) ||
555 NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
556 if (vp->v_type == VDIR)
557 np->n_direofoffset = 0;
558 mtx_unlock(&np->n_mtx);
559 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
560 if (error == EINTR || error == EIO) {
561 if (NFS_ISV4(vp))
562 (void) nfsrpc_close(vp, 0,
563 ap->a_td);
564 return (error);
565 }
566 mtx_lock(&np->n_mtx);
567 np->n_mtime = vattr.va_mtime;
568 if (NFS_ISV4(vp))
569 np->n_change = vattr.va_filerev;
570 }
571 mtx_unlock(&np->n_mtx);
572 }
573 }
574
575 /*
576 * If the object has >= 1 O_DIRECT active opens, we disable caching.
577 */
578 if (newnfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) {
579 if (np->n_directio_opens == 0) {
580 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
581 if (error) {
582 if (NFS_ISV4(vp))
583 (void) nfsrpc_close(vp, 0, ap->a_td);
584 return (error);
585 }
586 mtx_lock(&np->n_mtx);
587 np->n_flag |= NNONCACHE;
588 } else {
589 mtx_lock(&np->n_mtx);
590 }
591 np->n_directio_opens++;
592 mtx_unlock(&np->n_mtx);
593 }
594 vnode_create_vobject(vp, vattr.va_size, ap->a_td);
595 return (0);
596}
597
598/*
599 * nfs close vnode op
600 * What an NFS client should do upon close after writing is a debatable issue.
601 * Most NFS clients push delayed writes to the server upon close, basically for
602 * two reasons:
603 * 1 - So that any write errors may be reported back to the client process
604 * doing the close system call. By far the two most likely errors are
605 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
606 * 2 - To put a worst case upper bound on cache inconsistency between
607 * multiple clients for the file.
608 * There is also a consistency problem for Version 2 of the protocol w.r.t.
609 * not being able to tell if other clients are writing a file concurrently,
610 * since there is no way of knowing if the changed modify time in the reply
611 * is only due to the write for this client.
612 * (NFS Version 3 provides weak cache consistency data in the reply that
613 * should be sufficient to detect and handle this case.)
614 *
615 * The current code does the following:
616 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
617 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
618 * or commit them (this satisfies 1 and 2 except for the
619 * case where the server crashes after this close but
620 * before the commit RPC, which is felt to be "good
621 * enough". Changing the last argument to ncl_flush() to
622 * a 1 would force a commit operation, if it is felt a
623 * commit is necessary now.
624 * for NFS Version 4 - flush the dirty buffers and commit them, if
625 * nfscl_mustflush() says this is necessary.
626 * It is necessary if there is no write delegation held,
627 * in order to satisfy open/close coherency.
628 * If the file isn't cached on local stable storage,
629 * it may be necessary in order to detect "out of space"
630 * errors from the server, if the write delegation
631 * issued by the server doesn't allow the file to grow.
632 */
633/* ARGSUSED */
634static int
635nfs_close(struct vop_close_args *ap)
636{
637 struct vnode *vp = ap->a_vp;
638 struct nfsnode *np = VTONFS(vp);
639 struct nfsvattr nfsva;
640 struct ucred *cred;
641 int error = 0, ret, localcred = 0;
642 int fmode = ap->a_fflag;
643
644 if ((vp->v_mount->mnt_kern_flag & MNTK_UNMOUNTF))
645 return (0);
646 /*
647 * During shutdown, a_cred isn't valid, so just use root.
648 */
649 if (ap->a_cred == NOCRED) {
650 cred = newnfs_getcred();
651 localcred = 1;
652 } else {
653 cred = ap->a_cred;
654 }
655 if (vp->v_type == VREG) {
656 /*
657 * Examine and clean dirty pages, regardless of NMODIFIED.
658 * This closes a major hole in close-to-open consistency.
659 * We want to push out all dirty pages (and buffers) on
660 * close, regardless of whether they were dirtied by
661 * mmap'ed writes or via write().
662 */
663 if (nfs_clean_pages_on_close && vp->v_object) {
664 VM_OBJECT_LOCK(vp->v_object);
665 vm_object_page_clean(vp->v_object, 0, 0, 0);
666 VM_OBJECT_UNLOCK(vp->v_object);
667 }
668 mtx_lock(&np->n_mtx);
669 if (np->n_flag & NMODIFIED) {
670 mtx_unlock(&np->n_mtx);
671 if (NFS_ISV3(vp)) {
672 /*
673 * Under NFSv3 we have dirty buffers to dispose of. We
674 * must flush them to the NFS server. We have the option
675 * of waiting all the way through the commit rpc or just
676 * waiting for the initial write. The default is to only
677 * wait through the initial write so the data is in the
678 * server's cache, which is roughly similar to the state
679 * a standard disk subsystem leaves the file in on close().
680 *
681 * We cannot clear the NMODIFIED bit in np->n_flag due to
682 * potential races with other processes, and certainly
683 * cannot clear it if we don't commit.
684 * These races occur when there is no longer the old
685 * traditional vnode locking implemented for Vnode Ops.
686 */
687 int cm = newnfs_commit_on_close ? 1 : 0;
688 error = ncl_flush(vp, MNT_WAIT, cred, ap->a_td, cm);
689 /* np->n_flag &= ~NMODIFIED; */
690 } else if (NFS_ISV4(vp)) {
691 if (nfscl_mustflush(vp)) {
692 int cm = newnfs_commit_on_close ? 1 : 0;
693 error = ncl_flush(vp, MNT_WAIT, cred, ap->a_td,
694 cm);
695 /*
696 * as above w.r.t races when clearing
697 * NMODIFIED.
698 * np->n_flag &= ~NMODIFIED;
699 */
700 }
701 } else
702 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
703 mtx_lock(&np->n_mtx);
704 }
705 /*
706 * Invalidate the attribute cache in all cases.
707 * An open is going to fetch fresh attrs any way, other procs
708 * on this node that have file open will be forced to do an
709 * otw attr fetch, but this is safe.
710 * --> A user found that their RPC count dropped by 20% when
711 * this was commented out and I can't see any requirement
712 * for it, so I've disabled it when negative lookups are
713 * enabled. (What does this have to do with negative lookup
714 * caching? Well nothing, except it was reported by the
715 * same user that needed negative lookup caching and I wanted
716 * there to be a way to disable it via sysctl to see if it
717 * is the cause of some caching/coherency issue that might
718 * crop up.)
719 */
720 if (newnfs_neglookup_enable == 0)
721 np->n_attrstamp = 0;
722 if (np->n_flag & NWRITEERR) {
723 np->n_flag &= ~NWRITEERR;
724 error = np->n_error;
725 }
726 mtx_unlock(&np->n_mtx);
727 }
728
729 if (NFS_ISV4(vp)) {
730 /*
731 * Get attributes so "change" is up to date.
732 */
733 if (!error) {
734 ret = nfsrpc_getattr(vp, cred, ap->a_td, &nfsva,
735 NULL);
736 if (!ret) {
737 np->n_change = nfsva.na_filerev;
738 (void) nfscl_loadattrcache(&vp, &nfsva, NULL,
739 NULL, 0, 0);
740 }
741 }
742
743 /*
744 * and do the close.
745 */
746 ret = nfsrpc_close(vp, 0, ap->a_td);
747 if (!error && ret)
748 error = ret;
749 if (error)
750 error = nfscl_maperr(ap->a_td, error, (uid_t)0,
751 (gid_t)0);
752 }
753 if (newnfs_directio_enable)
754 KASSERT((np->n_directio_asyncwr == 0),
755 ("nfs_close: dirty unflushed (%d) directio buffers\n",
756 np->n_directio_asyncwr));
757 if (newnfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) {
758 mtx_lock(&np->n_mtx);
759 KASSERT((np->n_directio_opens > 0),
760 ("nfs_close: unexpectedly value (0) of n_directio_opens\n"));
761 np->n_directio_opens--;
762 if (np->n_directio_opens == 0)
763 np->n_flag &= ~NNONCACHE;
764 mtx_unlock(&np->n_mtx);
765 }
766 if (localcred)
767 NFSFREECRED(cred);
768 return (error);
769}
770
771/*
772 * nfs getattr call from vfs.
773 */
774static int
775nfs_getattr(struct vop_getattr_args *ap)
776{
777 struct vnode *vp = ap->a_vp;
778 struct thread *td = curthread; /* XXX */
779 struct nfsnode *np = VTONFS(vp);
780 int error = 0;
781 struct nfsvattr nfsva;
782 struct vattr *vap = ap->a_vap;
783 struct vattr vattr;
784
785 /*
786 * Update local times for special files.
787 */
788 mtx_lock(&np->n_mtx);
789 if (np->n_flag & (NACC | NUPD))
790 np->n_flag |= NCHG;
791 mtx_unlock(&np->n_mtx);
792 /*
793 * First look in the cache.
794 */
795 if (ncl_getattrcache(vp, &vattr) == 0) {
796 vap->va_type = vattr.va_type;
797 vap->va_mode = vattr.va_mode;
798 vap->va_nlink = vattr.va_nlink;
799 vap->va_uid = vattr.va_uid;
800 vap->va_gid = vattr.va_gid;
801 vap->va_fsid = vattr.va_fsid;
802 vap->va_fileid = vattr.va_fileid;
803 vap->va_size = vattr.va_size;
804 vap->va_blocksize = vattr.va_blocksize;
805 vap->va_atime = vattr.va_atime;
806 vap->va_mtime = vattr.va_mtime;
807 vap->va_ctime = vattr.va_ctime;
808 vap->va_gen = vattr.va_gen;
809 vap->va_flags = vattr.va_flags;
810 vap->va_rdev = vattr.va_rdev;
811 vap->va_bytes = vattr.va_bytes;
812 vap->va_filerev = vattr.va_filerev;
813 /*
814 * Get the local modify time for the case of a write
815 * delegation.
816 */
817 nfscl_deleggetmodtime(vp, &vap->va_mtime);
818 return (0);
819 }
820
821 if (NFS_ISV34(vp) && nfs_prime_access_cache &&
822 nfsaccess_cache_timeout > 0) {
823 NFSINCRGLOBAL(newnfsstats.accesscache_misses);
824 nfs34_access_otw(vp, NFSACCESS_ALL, td, ap->a_cred, NULL);
825 if (ncl_getattrcache(vp, ap->a_vap) == 0) {
826 nfscl_deleggetmodtime(vp, &ap->a_vap->va_mtime);
827 return (0);
828 }
829 }
830 error = nfsrpc_getattr(vp, ap->a_cred, td, &nfsva, NULL);
831 if (!error)
832 error = nfscl_loadattrcache(&vp, &nfsva, vap, NULL, 0, 0);
833 if (!error) {
834 /*
835 * Get the local modify time for the case of a write
836 * delegation.
837 */
838 nfscl_deleggetmodtime(vp, &vap->va_mtime);
839 } else if (NFS_ISV4(vp)) {
840 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
841 }
842 return (error);
843}
844
845/*
846 * nfs setattr call.
847 */
848static int
849nfs_setattr(struct vop_setattr_args *ap)
850{
851 struct vnode *vp = ap->a_vp;
852 struct nfsnode *np = VTONFS(vp);
853 struct thread *td = curthread; /* XXX */
854 struct vattr *vap = ap->a_vap;
855 int error = 0;
856 u_quad_t tsize;
857
858#ifndef nolint
859 tsize = (u_quad_t)0;
860#endif
861
862 /*
863 * Setting of flags and marking of atimes are not supported.
864 */
865 if (vap->va_flags != VNOVAL)
866 return (EOPNOTSUPP);
867
868 /*
869 * Disallow write attempts if the filesystem is mounted read-only.
870 */
871 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
872 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
873 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
874 (vp->v_mount->mnt_flag & MNT_RDONLY))
875 return (EROFS);
876 if (vap->va_size != VNOVAL) {
877 switch (vp->v_type) {
878 case VDIR:
879 return (EISDIR);
880 case VCHR:
881 case VBLK:
882 case VSOCK:
883 case VFIFO:
884 if (vap->va_mtime.tv_sec == VNOVAL &&
885 vap->va_atime.tv_sec == VNOVAL &&
886 vap->va_mode == (mode_t)VNOVAL &&
887 vap->va_uid == (uid_t)VNOVAL &&
888 vap->va_gid == (gid_t)VNOVAL)
889 return (0);
890 vap->va_size = VNOVAL;
891 break;
892 default:
893 /*
894 * Disallow write attempts if the filesystem is
895 * mounted read-only.
896 */
897 if (vp->v_mount->mnt_flag & MNT_RDONLY)
898 return (EROFS);
899 /*
900 * We run vnode_pager_setsize() early (why?),
901 * we must set np->n_size now to avoid vinvalbuf
902 * V_SAVE races that might setsize a lower
903 * value.
904 */
905 mtx_lock(&np->n_mtx);
906 tsize = np->n_size;
907 mtx_unlock(&np->n_mtx);
908 error = ncl_meta_setsize(vp, ap->a_cred, td,
909 vap->va_size);
910 mtx_lock(&np->n_mtx);
911 if (np->n_flag & NMODIFIED) {
912 tsize = np->n_size;
913 mtx_unlock(&np->n_mtx);
914 if (vap->va_size == 0)
915 error = ncl_vinvalbuf(vp, 0, td, 1);
916 else
917 error = ncl_vinvalbuf(vp, V_SAVE, td, 1);
918 if (error) {
919 vnode_pager_setsize(vp, tsize);
920 return (error);
921 }
922 /*
923 * Call nfscl_delegmodtime() to set the modify time
924 * locally, as required.
925 */
926 nfscl_delegmodtime(vp);
927 } else
928 mtx_unlock(&np->n_mtx);
929 /*
930 * np->n_size has already been set to vap->va_size
931 * in ncl_meta_setsize(). We must set it again since
932 * nfs_loadattrcache() could be called through
933 * ncl_meta_setsize() and could modify np->n_size.
934 */
935 mtx_lock(&np->n_mtx);
936 np->n_vattr.na_size = np->n_size = vap->va_size;
937 mtx_unlock(&np->n_mtx);
938 };
939 } else {
940 mtx_lock(&np->n_mtx);
941 if ((vap->va_mtime.tv_sec != VNOVAL || vap->va_atime.tv_sec != VNOVAL) &&
942 (np->n_flag & NMODIFIED) && vp->v_type == VREG) {
943 mtx_unlock(&np->n_mtx);
944 if ((error = ncl_vinvalbuf(vp, V_SAVE, td, 1)) != 0 &&
945 (error == EINTR || error == EIO))
946 return (error);
947 } else
948 mtx_unlock(&np->n_mtx);
949 }
950 error = nfs_setattrrpc(vp, vap, ap->a_cred, td);
951 if (error && vap->va_size != VNOVAL) {
952 mtx_lock(&np->n_mtx);
953 np->n_size = np->n_vattr.na_size = tsize;
954 vnode_pager_setsize(vp, tsize);
955 mtx_unlock(&np->n_mtx);
956 }
957 return (error);
958}
959
960/*
961 * Do an nfs setattr rpc.
962 */
963static int
964nfs_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred,
965 struct thread *td)
966{
967 struct nfsnode *np = VTONFS(vp);
968 int error, ret, attrflag, i;
969 struct nfsvattr nfsva;
970
971 if (NFS_ISV34(vp)) {
972 mtx_lock(&np->n_mtx);
973 for (i = 0; i < NFS_ACCESSCACHESIZE; i++)
974 np->n_accesscache[i].stamp = 0;
975 np->n_flag |= NDELEGMOD;
976 mtx_unlock(&np->n_mtx);
977 }
978 error = nfsrpc_setattr(vp, vap, NULL, cred, td, &nfsva, &attrflag,
979 NULL);
980 if (attrflag) {
981 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
982 if (ret && !error)
983 error = ret;
984 }
985 if (error && NFS_ISV4(vp))
986 error = nfscl_maperr(td, error, vap->va_uid, vap->va_gid);
987 return (error);
988}
989
990/*
991 * nfs lookup call, one step at a time...
992 * First look in cache
993 * If not found, unlock the directory nfsnode and do the rpc
994 */
995static int
996nfs_lookup(struct vop_lookup_args *ap)
997{
998 struct componentname *cnp = ap->a_cnp;
999 struct vnode *dvp = ap->a_dvp;
1000 struct vnode **vpp = ap->a_vpp;
1001 struct mount *mp = dvp->v_mount;
1002 int flags = cnp->cn_flags;
1003 struct vnode *newvp;
1004 struct nfsmount *nmp;
1005 struct nfsnode *np;
1006 int error = 0, attrflag, dattrflag, ltype;
1007 struct thread *td = cnp->cn_thread;
1008 struct nfsfh *nfhp;
1009 struct nfsvattr dnfsva, nfsva;
1010
1011 *vpp = NULLVP;
1012 if ((flags & ISLASTCN) && (mp->mnt_flag & MNT_RDONLY) &&
1013 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
1014 return (EROFS);
1015 if (dvp->v_type != VDIR)
1016 return (ENOTDIR);
1017 nmp = VFSTONFS(mp);
1018 np = VTONFS(dvp);
1019
1020 /* For NFSv4, wait until any remove is done. */
1021 mtx_lock(&np->n_mtx);
1022 while (NFSHASNFSV4(nmp) && (np->n_flag & NREMOVEINPROG)) {
1023 np->n_flag |= NREMOVEWANT;
1024 (void) msleep((caddr_t)np, &np->n_mtx, PZERO, "nfslkup", 0);
1025 }
1026 mtx_unlock(&np->n_mtx);
1027
1028 if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0)
1029 return (error);
1030 if ((error = cache_lookup(dvp, vpp, cnp)) &&
1031 (error != ENOENT || newnfs_neglookup_enable != 0)) {
1032 struct vattr vattr;
1033
1034 if (error == ENOENT) {
1035 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred) &&
1036 vattr.va_mtime.tv_sec == np->n_dmtime) {
1037 NFSINCRGLOBAL(newnfsstats.lookupcache_hits);
1038 return (ENOENT);
1039 }
1040 cache_purge_negative(dvp);
1041 np->n_dmtime = 0;
1042 } else {
1043 newvp = *vpp;
1044 if (nfscl_nodeleg(newvp, 0) == 0 ||
1045 (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred) &&
1046 vattr.va_ctime.tv_sec==VTONFS(newvp)->n_ctime)) {
1047 NFSINCRGLOBAL(newnfsstats.lookupcache_hits);
1048 if (cnp->cn_nameiop != LOOKUP &&
1049 (flags & ISLASTCN))
1050 cnp->cn_flags |= SAVENAME;
1051 return (0);
1052 }
1053 cache_purge(newvp);
1054 if (dvp != newvp)
1055 vput(newvp);
1056 else
1057 vrele(newvp);
1058 *vpp = NULLVP;
1059 }
1060 }
1061 error = 0;
1062 newvp = NULLVP;
1063 NFSINCRGLOBAL(newnfsstats.lookupcache_misses);
1064 error = nfsrpc_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1065 cnp->cn_cred, td, &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1066 NULL);
1067 if (dattrflag)
1068 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1069 if (error) {
1070 if (newnfs_neglookup_enable != 0 &&
1071 error == ENOENT && (cnp->cn_flags & MAKEENTRY) &&
1072 cnp->cn_nameiop != CREATE) {
1073 if (np->n_dmtime == 0)
1074 np->n_dmtime = np->n_vattr.na_mtime.tv_sec;
1075 cache_enter(dvp, NULL, cnp);
1076 }
1077 if (newvp != NULLVP) {
1078 vput(newvp);
1079 *vpp = NULLVP;
1080 }
1081 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) &&
1082 (flags & ISLASTCN) && error == ENOENT) {
1083 if (mp->mnt_flag & MNT_RDONLY)
1084 error = EROFS;
1085 else
1086 error = EJUSTRETURN;
1087 }
1088 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
1089 cnp->cn_flags |= SAVENAME;
1090 if (NFS_ISV4(dvp))
1091 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1092 return (error);
1093 }
1094
1095 /*
1096 * Handle RENAME case...
1097 */
1098 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) {
1099 if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) {
1100 FREE((caddr_t)nfhp, M_NFSFH);
1101 return (EISDIR);
1102 }
1103 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL);
1104 if (error)
1105 return (error);
1106 newvp = NFSTOV(np);
1107 if (attrflag)
1108 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1109 0, 1);
1110 *vpp = newvp;
1111 cnp->cn_flags |= SAVENAME;
1112 return (0);
1113 }
1114
1115 if (flags & ISDOTDOT) {
1116 ltype = VOP_ISLOCKED(dvp);
1117 error = vfs_busy(mp, MBF_NOWAIT);
1118 if (error != 0) {
1119 vfs_ref(mp);
1120 VOP_UNLOCK(dvp, 0);
1121 error = vfs_busy(mp, 0);
1122 vn_lock(dvp, ltype | LK_RETRY);
1123 vfs_rel(mp);
1124 if (error == 0 && (dvp->v_iflag & VI_DOOMED)) {
1125 vfs_unbusy(mp);
1126 error = ENOENT;
1127 }
1128 if (error != 0)
1129 return (error);
1130 }
1131 VOP_UNLOCK(dvp, 0);
1132 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL);
1133 if (error == 0)
1134 newvp = NFSTOV(np);
1135 vfs_unbusy(mp);
1136 if (newvp != dvp)
1137 vn_lock(dvp, ltype | LK_RETRY);
1138 if (dvp->v_iflag & VI_DOOMED) {
1139 if (error == 0) {
1140 if (newvp == dvp)
1141 vrele(newvp);
1142 else
1143 vput(newvp);
1144 }
1145 error = ENOENT;
1146 }
1147 if (error != 0)
1148 return (error);
1149 if (attrflag)
1150 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1151 0, 1);
1152 } else if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) {
1153 FREE((caddr_t)nfhp, M_NFSFH);
1154 VREF(dvp);
1155 newvp = dvp;
1156 if (attrflag)
1157 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1158 0, 1);
1159 } else {
1160 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL);
1161 if (error)
1162 return (error);
1163 newvp = NFSTOV(np);
1164 if (attrflag)
1165 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1166 0, 1);
1167 }
1168 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
1169 cnp->cn_flags |= SAVENAME;
1170 if ((cnp->cn_flags & MAKEENTRY) &&
1171 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) {
1172 np->n_ctime = np->n_vattr.na_vattr.va_ctime.tv_sec;
1173 cache_enter(dvp, newvp, cnp);
1174 }
1175 *vpp = newvp;
1176 return (0);
1177}
1178
1179/*
1180 * nfs read call.
1181 * Just call ncl_bioread() to do the work.
1182 */
1183static int
1184nfs_read(struct vop_read_args *ap)
1185{
1186 struct vnode *vp = ap->a_vp;
1187
1188 switch (vp->v_type) {
1189 case VREG:
1190 return (ncl_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred));
1191 case VDIR:
1192 return (EISDIR);
1193 default:
1194 return (EOPNOTSUPP);
1195 }
1196}
1197
1198/*
1199 * nfs readlink call
1200 */
1201static int
1202nfs_readlink(struct vop_readlink_args *ap)
1203{
1204 struct vnode *vp = ap->a_vp;
1205
1206 if (vp->v_type != VLNK)
1207 return (EINVAL);
1208 return (ncl_bioread(vp, ap->a_uio, 0, ap->a_cred));
1209}
1210
1211/*
1212 * Do a readlink rpc.
1213 * Called by ncl_doio() from below the buffer cache.
1214 */
1215int
1216ncl_readlinkrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1217{
1218 int error, ret, attrflag;
1219 struct nfsvattr nfsva;
1220
1221 error = nfsrpc_readlink(vp, uiop, cred, uiop->uio_td, &nfsva,
1222 &attrflag, NULL);
1223 if (attrflag) {
1224 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1225 if (ret && !error)
1226 error = ret;
1227 }
1228 if (error && NFS_ISV4(vp))
1229 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1230 return (error);
1231}
1232
1233/*
1234 * nfs read rpc call
1235 * Ditto above
1236 */
1237int
1238ncl_readrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1239{
1240 int error, ret, attrflag;
1241 struct nfsvattr nfsva;
1242
1243 error = nfsrpc_read(vp, uiop, cred, uiop->uio_td, &nfsva, &attrflag,
1244 NULL);
1245 if (attrflag) {
1246 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1247 if (ret && !error)
1248 error = ret;
1249 }
1250 if (error && NFS_ISV4(vp))
1251 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1252 return (error);
1253}
1254
1255/*
1256 * nfs write call
1257 */
1258int
1259ncl_writerpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
1260 int *iomode, int *must_commit)
1261{
1262 struct nfsvattr nfsva;
1263 int error = 0, attrflag, ret;
1264 u_char verf[NFSX_VERF];
1265 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1266
1267 *must_commit = 0;
1268 error = nfsrpc_write(vp, uiop, iomode, verf, cred,
1269 uiop->uio_td, &nfsva, &attrflag, NULL);
1270 NFSLOCKMNT(nmp);
1271 if (!error && NFSHASWRITEVERF(nmp) &&
1272 NFSBCMP(verf, nmp->nm_verf, NFSX_VERF)) {
1273 *must_commit = 1;
1274 NFSBCOPY(verf, nmp->nm_verf, NFSX_VERF);
1275 }
1276 NFSUNLOCKMNT(nmp);
1277 if (attrflag) {
1278 if (VTONFS(vp)->n_flag & ND_NFSV4)
1279 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 1,
1280 1);
1281 else
1282 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
1283 1);
1284 if (ret && !error)
1285 error = ret;
1286 }
1287 if (vp->v_mount->mnt_kern_flag & MNTK_ASYNC)
1288 *iomode = NFSWRITE_FILESYNC;
1289 if (error && NFS_ISV4(vp))
1290 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1291 return (error);
1292}
1293
1294/*
1295 * nfs mknod rpc
1296 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1297 * mode set to specify the file type and the size field for rdev.
1298 */
1299static int
1300nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1301 struct vattr *vap)
1302{
1303 struct nfsvattr nfsva, dnfsva;
1304 struct vnode *newvp = NULL;
1305 struct nfsnode *np = NULL, *dnp;
1306 struct nfsfh *nfhp;
1307 struct vattr vattr;
1308 int error = 0, attrflag, dattrflag;
1309 u_int32_t rdev;
1310
1311 if (vap->va_type == VCHR || vap->va_type == VBLK)
1312 rdev = vap->va_rdev;
1313 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1314 rdev = 0xffffffff;
1315 else
1316 return (EOPNOTSUPP);
1317 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1318 return (error);
1319 error = nfsrpc_mknod(dvp, cnp->cn_nameptr, cnp->cn_namelen, vap,
1320 rdev, vap->va_type, cnp->cn_cred, cnp->cn_thread, &dnfsva,
1321 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
1322 if (!error) {
1323 if (!nfhp)
1324 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
1325 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread,
1326 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1327 NULL);
1328 if (nfhp)
1329 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
1330 cnp->cn_thread, &np, NULL);
1331 }
1332 if (dattrflag)
1333 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1334 if (!error) {
1335 newvp = NFSTOV(np);
1336 if (attrflag)
1337 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1338 0, 1);
1339 }
1340 if (!error) {
1341 if ((cnp->cn_flags & MAKEENTRY))
1342 cache_enter(dvp, newvp, cnp);
1343 *vpp = newvp;
1344 } else if (NFS_ISV4(dvp)) {
1345 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1346 vap->va_gid);
1347 }
1348 dnp = VTONFS(dvp);
1349 mtx_lock(&dnp->n_mtx);
1350 dnp->n_flag |= NMODIFIED;
1351 if (!dattrflag)
1352 dnp->n_attrstamp = 0;
1353 mtx_unlock(&dnp->n_mtx);
1354 return (error);
1355}
1356
1357/*
1358 * nfs mknod vop
1359 * just call nfs_mknodrpc() to do the work.
1360 */
1361/* ARGSUSED */
1362static int
1363nfs_mknod(struct vop_mknod_args *ap)
1364{
1365 return (nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap));
1366}
1367
1368static u_long create_verf;
1369/*
1370 * nfs file create call
1371 */
1372static int
1373nfs_create(struct vop_create_args *ap)
1374{
1375 struct vnode *dvp = ap->a_dvp;
1376 struct vattr *vap = ap->a_vap;
1377 struct componentname *cnp = ap->a_cnp;
1378 struct nfsnode *np = NULL, *dnp;
1379 struct vnode *newvp = NULL;
1380 struct nfsmount *nmp;
1381 struct nfsvattr dnfsva, nfsva;
1382 struct nfsfh *nfhp;
1383 nfsquad_t cverf;
1384 int error = 0, attrflag, dattrflag, fmode = 0;
1385 struct vattr vattr;
1386
1387 /*
1388 * Oops, not for me..
1389 */
1390 if (vap->va_type == VSOCK)
1391 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1392
1393 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1394 return (error);
1395 if (vap->va_vaflags & VA_EXCLUSIVE)
1396 fmode |= O_EXCL;
1397 dnp = VTONFS(dvp);
1398 nmp = VFSTONFS(vnode_mount(dvp));
1399again:
1400 /* For NFSv4, wait until any remove is done. */
1401 mtx_lock(&dnp->n_mtx);
1402 while (NFSHASNFSV4(nmp) && (dnp->n_flag & NREMOVEINPROG)) {
1403 dnp->n_flag |= NREMOVEWANT;
1404 (void) msleep((caddr_t)dnp, &dnp->n_mtx, PZERO, "nfscrt", 0);
1405 }
1406 mtx_unlock(&dnp->n_mtx);
1407
|
1421 error = nfsrpc_create(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1422 vap, cverf, fmode, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva,
1423 &nfhp, &attrflag, &dattrflag, NULL);
1424 if (!error) {
1425 if (nfhp == NULL)
1426 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
1427 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread,
1428 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1429 NULL);
1430 if (nfhp != NULL)
1431 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
1432 cnp->cn_thread, &np, NULL);
1433 }
1434 if (dattrflag)
1435 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1436 if (!error) {
1437 newvp = NFSTOV(np);
1438 if (attrflag)
1439 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1440 0, 1);
1441 }
1442 if (error) {
1443 if (newvp != NULL) {
1444 vrele(newvp);
1445 newvp = NULL;
1446 }
1447 if (NFS_ISV34(dvp) && (fmode & O_EXCL) &&
1448 error == NFSERR_NOTSUPP) {
1449 fmode &= ~O_EXCL;
1450 goto again;
1451 }
1452 } else if (NFS_ISV34(dvp) && (fmode & O_EXCL)) {
1453 if (nfscl_checksattr(vap, &nfsva)) {
1454 error = nfsrpc_setattr(newvp, vap, NULL, cnp->cn_cred,
1455 cnp->cn_thread, &nfsva, &attrflag, NULL);
1456 if (error && (vap->va_uid != (uid_t)VNOVAL ||
1457 vap->va_gid != (gid_t)VNOVAL)) {
1458 /* try again without setting uid/gid */
1459 vap->va_uid = (uid_t)VNOVAL;
1460 vap->va_gid = (uid_t)VNOVAL;
1461 error = nfsrpc_setattr(newvp, vap, NULL,
1462 cnp->cn_cred, cnp->cn_thread, &nfsva,
1463 &attrflag, NULL);
1464 }
1465 if (attrflag)
1466 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
1467 NULL, 0, 1);
1468 }
1469 }
1470 if (!error) {
1471 if (cnp->cn_flags & MAKEENTRY)
1472 cache_enter(dvp, newvp, cnp);
1473 *ap->a_vpp = newvp;
1474 } else if (NFS_ISV4(dvp)) {
1475 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1476 vap->va_gid);
1477 }
1478 mtx_lock(&dnp->n_mtx);
1479 dnp->n_flag |= NMODIFIED;
1480 if (!dattrflag)
1481 dnp->n_attrstamp = 0;
1482 mtx_unlock(&dnp->n_mtx);
1483 return (error);
1484}
1485
1486/*
1487 * nfs file remove call
1488 * To try and make nfs semantics closer to ufs semantics, a file that has
1489 * other processes using the vnode is renamed instead of removed and then
1490 * removed later on the last close.
1491 * - If v_usecount > 1
1492 * If a rename is not already in the works
1493 * call nfs_sillyrename() to set it up
1494 * else
1495 * do the remove rpc
1496 */
1497static int
1498nfs_remove(struct vop_remove_args *ap)
1499{
1500 struct vnode *vp = ap->a_vp;
1501 struct vnode *dvp = ap->a_dvp;
1502 struct componentname *cnp = ap->a_cnp;
1503 struct nfsnode *np = VTONFS(vp);
1504 int error = 0;
1505 struct vattr vattr;
1506
1507#ifndef DIAGNOSTIC
1508 if ((cnp->cn_flags & HASBUF) == 0)
1509 panic("nfs_remove: no name");
1510 if (vrefcnt(vp) < 1)
1511 panic("nfs_remove: bad v_usecount");
1512#endif
1513 if (vp->v_type == VDIR)
1514 error = EPERM;
1515 else if (vrefcnt(vp) == 1 || (np->n_sillyrename &&
1516 VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 &&
1517 vattr.va_nlink > 1)) {
1518 /*
1519 * Purge the name cache so that the chance of a lookup for
1520 * the name succeeding while the remove is in progress is
1521 * minimized. Without node locking it can still happen, such
1522 * that an I/O op returns ESTALE, but since you get this if
1523 * another host removes the file..
1524 */
1525 cache_purge(vp);
1526 /*
1527 * throw away biocache buffers, mainly to avoid
1528 * unnecessary delayed writes later.
1529 */
1530 error = ncl_vinvalbuf(vp, 0, cnp->cn_thread, 1);
1531 /* Do the rpc */
1532 if (error != EINTR && error != EIO)
1533 error = nfs_removerpc(dvp, vp, cnp->cn_nameptr,
1534 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread);
1535 /*
1536 * Kludge City: If the first reply to the remove rpc is lost..
1537 * the reply to the retransmitted request will be ENOENT
1538 * since the file was in fact removed
1539 * Therefore, we cheat and return success.
1540 */
1541 if (error == ENOENT)
1542 error = 0;
1543 } else if (!np->n_sillyrename)
1544 error = nfs_sillyrename(dvp, vp, cnp);
1545 np->n_attrstamp = 0;
1546 return (error);
1547}
1548
1549/*
1550 * nfs file remove rpc called from nfs_inactive
1551 */
1552int
1553ncl_removeit(struct sillyrename *sp, struct vnode *vp)
1554{
1555 /*
1556 * Make sure that the directory vnode is still valid.
1557 * XXX we should lock sp->s_dvp here.
1558 */
1559 if (sp->s_dvp->v_type == VBAD)
1560 return (0);
1561 return (nfs_removerpc(sp->s_dvp, vp, sp->s_name, sp->s_namlen,
1562 sp->s_cred, NULL));
1563}
1564
1565/*
1566 * Nfs remove rpc, called from nfs_remove() and ncl_removeit().
1567 */
1568static int
1569nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
1570 int namelen, struct ucred *cred, struct thread *td)
1571{
1572 struct nfsvattr dnfsva;
1573 struct nfsnode *dnp = VTONFS(dvp);
1574 int error = 0, dattrflag;
1575
1576 mtx_lock(&dnp->n_mtx);
1577 dnp->n_flag |= NREMOVEINPROG;
1578 mtx_unlock(&dnp->n_mtx);
1579 error = nfsrpc_remove(dvp, name, namelen, vp, cred, td, &dnfsva,
1580 &dattrflag, NULL);
1581 mtx_lock(&dnp->n_mtx);
1582 if ((dnp->n_flag & NREMOVEWANT)) {
1583 dnp->n_flag &= ~(NREMOVEWANT | NREMOVEINPROG);
1584 mtx_unlock(&dnp->n_mtx);
1585 wakeup((caddr_t)dnp);
1586 } else {
1587 dnp->n_flag &= ~NREMOVEINPROG;
1588 mtx_unlock(&dnp->n_mtx);
1589 }
1590 if (dattrflag)
1591 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1592 mtx_lock(&dnp->n_mtx);
1593 dnp->n_flag |= NMODIFIED;
1594 if (!dattrflag)
1595 dnp->n_attrstamp = 0;
1596 mtx_unlock(&dnp->n_mtx);
1597 if (error && NFS_ISV4(dvp))
1598 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1599 return (error);
1600}
1601
1602/*
1603 * nfs file rename call
1604 */
1605static int
1606nfs_rename(struct vop_rename_args *ap)
1607{
1608 struct vnode *fvp = ap->a_fvp;
1609 struct vnode *tvp = ap->a_tvp;
1610 struct vnode *fdvp = ap->a_fdvp;
1611 struct vnode *tdvp = ap->a_tdvp;
1612 struct componentname *tcnp = ap->a_tcnp;
1613 struct componentname *fcnp = ap->a_fcnp;
1614 struct nfsnode *fnp = VTONFS(ap->a_fvp);
1615 struct nfsnode *tdnp = VTONFS(ap->a_tdvp);
1616 struct nfsv4node *newv4 = NULL;
1617 int error;
1618
1619#ifndef DIAGNOSTIC
1620 if ((tcnp->cn_flags & HASBUF) == 0 ||
1621 (fcnp->cn_flags & HASBUF) == 0)
1622 panic("nfs_rename: no name");
1623#endif
1624 /* Check for cross-device rename */
1625 if ((fvp->v_mount != tdvp->v_mount) ||
1626 (tvp && (fvp->v_mount != tvp->v_mount))) {
1627 error = EXDEV;
1628 goto out;
1629 }
1630
1631 if (fvp == tvp) {
1632 ncl_printf("nfs_rename: fvp == tvp (can't happen)\n");
1633 error = 0;
1634 goto out;
1635 }
1636 if ((error = vn_lock(fvp, LK_EXCLUSIVE)))
1637 goto out;
1638
1639 /*
1640 * We have to flush B_DELWRI data prior to renaming
1641 * the file. If we don't, the delayed-write buffers
1642 * can be flushed out later after the file has gone stale
1643 * under NFSV3. NFSV2 does not have this problem because
1644 * ( as far as I can tell ) it flushes dirty buffers more
1645 * often.
1646 *
1647 * Skip the rename operation if the fsync fails, this can happen
1648 * due to the server's volume being full, when we pushed out data
1649 * that was written back to our cache earlier. Not checking for
1650 * this condition can result in potential (silent) data loss.
1651 */
1652 error = VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_thread);
1653 VOP_UNLOCK(fvp, 0);
1654 if (!error && tvp)
1655 error = VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_thread);
1656 if (error)
1657 goto out;
1658
1659 /*
1660 * If the tvp exists and is in use, sillyrename it before doing the
1661 * rename of the new file over it.
1662 * XXX Can't sillyrename a directory.
1663 */
1664 if (tvp && vrefcnt(tvp) > 1 && !VTONFS(tvp)->n_sillyrename &&
1665 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1666 vput(tvp);
1667 tvp = NULL;
1668 }
1669
1670 error = nfs_renamerpc(fdvp, fvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1671 tdvp, tvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1672 tcnp->cn_thread);
1673
1674 if (!error) {
1675 /*
1676 * For NFSv4, check to see if it is the same name and
1677 * replace the name, if it is different.
1678 */
1679 MALLOC(newv4, struct nfsv4node *,
1680 sizeof (struct nfsv4node) +
1681 tdnp->n_fhp->nfh_len + tcnp->cn_namelen - 1,
1682 M_NFSV4NODE, M_WAITOK);
1683 mtx_lock(&tdnp->n_mtx);
1684 mtx_lock(&fnp->n_mtx);
1685 if (fnp->n_v4 != NULL && fvp->v_type == VREG &&
1686 (fnp->n_v4->n4_namelen != tcnp->cn_namelen ||
1687 NFSBCMP(tcnp->cn_nameptr, NFS4NODENAME(fnp->n_v4),
1688 tcnp->cn_namelen) ||
1689 tdnp->n_fhp->nfh_len != fnp->n_v4->n4_fhlen ||
1690 NFSBCMP(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1691 tdnp->n_fhp->nfh_len))) {
1692#ifdef notdef
1693{ char nnn[100]; int nnnl;
1694nnnl = (tcnp->cn_namelen < 100) ? tcnp->cn_namelen : 99;
1695bcopy(tcnp->cn_nameptr, nnn, nnnl);
1696nnn[nnnl] = '\0';
1697printf("ren replace=%s\n",nnn);
1698}
1699#endif
1700 FREE((caddr_t)fnp->n_v4, M_NFSV4NODE);
1701 fnp->n_v4 = newv4;
1702 newv4 = NULL;
1703 fnp->n_v4->n4_fhlen = tdnp->n_fhp->nfh_len;
1704 fnp->n_v4->n4_namelen = tcnp->cn_namelen;
1705 NFSBCOPY(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1706 tdnp->n_fhp->nfh_len);
1707 NFSBCOPY(tcnp->cn_nameptr,
1708 NFS4NODENAME(fnp->n_v4), tcnp->cn_namelen);
1709 }
1710 mtx_unlock(&tdnp->n_mtx);
1711 mtx_unlock(&fnp->n_mtx);
1712 if (newv4 != NULL)
1713 FREE((caddr_t)newv4, M_NFSV4NODE);
1714 }
1715
1716 if (fvp->v_type == VDIR) {
1717 if (tvp != NULL && tvp->v_type == VDIR)
1718 cache_purge(tdvp);
1719 cache_purge(fdvp);
1720 }
1721
1722out:
1723 if (tdvp == tvp)
1724 vrele(tdvp);
1725 else
1726 vput(tdvp);
1727 if (tvp)
1728 vput(tvp);
1729 vrele(fdvp);
1730 vrele(fvp);
1731 /*
1732 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1733 */
1734 if (error == ENOENT)
1735 error = 0;
1736 return (error);
1737}
1738
1739/*
1740 * nfs file rename rpc called from nfs_remove() above
1741 */
1742static int
1743nfs_renameit(struct vnode *sdvp, struct vnode *svp, struct componentname *scnp,
1744 struct sillyrename *sp)
1745{
1746
1747 return (nfs_renamerpc(sdvp, svp, scnp->cn_nameptr, scnp->cn_namelen,
1748 sdvp, NULL, sp->s_name, sp->s_namlen, scnp->cn_cred,
1749 scnp->cn_thread));
1750}
1751
1752/*
1753 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1754 */
1755static int
1756nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, char *fnameptr,
1757 int fnamelen, struct vnode *tdvp, struct vnode *tvp, char *tnameptr,
1758 int tnamelen, struct ucred *cred, struct thread *td)
1759{
1760 struct nfsvattr fnfsva, tnfsva;
1761 struct nfsnode *fdnp = VTONFS(fdvp);
1762 struct nfsnode *tdnp = VTONFS(tdvp);
1763 int error = 0, fattrflag, tattrflag;
1764
1765 error = nfsrpc_rename(fdvp, fvp, fnameptr, fnamelen, tdvp, tvp,
1766 tnameptr, tnamelen, cred, td, &fnfsva, &tnfsva, &fattrflag,
1767 &tattrflag, NULL, NULL);
1768 mtx_lock(&fdnp->n_mtx);
1769 fdnp->n_flag |= NMODIFIED;
1770 mtx_unlock(&fdnp->n_mtx);
1771 mtx_lock(&tdnp->n_mtx);
1772 tdnp->n_flag |= NMODIFIED;
1773 mtx_unlock(&tdnp->n_mtx);
1774 if (fattrflag)
1775 (void) nfscl_loadattrcache(&fdvp, &fnfsva, NULL, NULL, 0, 1);
1776 else
1777 fdnp->n_attrstamp = 0;
1778 if (tattrflag)
1779 (void) nfscl_loadattrcache(&tdvp, &tnfsva, NULL, NULL, 0, 1);
1780 else
1781 tdnp->n_attrstamp = 0;
1782 if (error && NFS_ISV4(fdvp))
1783 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1784 return (error);
1785}
1786
1787/*
1788 * nfs hard link create call
1789 */
1790static int
1791nfs_link(struct vop_link_args *ap)
1792{
1793 struct vnode *vp = ap->a_vp;
1794 struct vnode *tdvp = ap->a_tdvp;
1795 struct componentname *cnp = ap->a_cnp;
1796 struct nfsnode *tdnp;
1797 struct nfsvattr nfsva, dnfsva;
1798 int error = 0, attrflag, dattrflag;
1799
1800 if (vp->v_mount != tdvp->v_mount) {
1801 return (EXDEV);
1802 }
1803
1804 /*
1805 * Push all writes to the server, so that the attribute cache
1806 * doesn't get "out of sync" with the server.
1807 * XXX There should be a better way!
1808 */
1809 VOP_FSYNC(vp, MNT_WAIT, cnp->cn_thread);
1810
1811 error = nfsrpc_link(tdvp, vp, cnp->cn_nameptr, cnp->cn_namelen,
1812 cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &attrflag,
1813 &dattrflag, NULL);
1814 tdnp = VTONFS(tdvp);
1815 mtx_lock(&tdnp->n_mtx);
1816 tdnp->n_flag |= NMODIFIED;
1817 mtx_unlock(&tdnp->n_mtx);
1818 if (attrflag)
1819 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1820 else
1821 VTONFS(vp)->n_attrstamp = 0;
1822 if (dattrflag)
1823 (void) nfscl_loadattrcache(&tdvp, &dnfsva, NULL, NULL, 0, 1);
1824 else
1825 tdnp->n_attrstamp = 0;
1826 /*
1827 * If negative lookup caching is enabled, I might as well
1828 * add an entry for this node. Not necessary for correctness,
1829 * but if negative caching is enabled, then the system
1830 * must care about lookup caching hit rate, so...
1831 */
1832 if (newnfs_neglookup_enable != 0 &&
1833 (cnp->cn_flags & MAKEENTRY))
1834 cache_enter(tdvp, vp, cnp);
1835 if (error && NFS_ISV4(vp))
1836 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
1837 (gid_t)0);
1838 return (error);
1839}
1840
1841/*
1842 * nfs symbolic link create call
1843 */
1844static int
1845nfs_symlink(struct vop_symlink_args *ap)
1846{
1847 struct vnode *dvp = ap->a_dvp;
1848 struct vattr *vap = ap->a_vap;
1849 struct componentname *cnp = ap->a_cnp;
1850 struct nfsvattr nfsva, dnfsva;
1851 struct nfsfh *nfhp;
1852 struct nfsnode *np = NULL, *dnp;
1853 struct vnode *newvp = NULL;
1854 int error = 0, attrflag, dattrflag, ret;
1855
1856 vap->va_type = VLNK;
1857 error = nfsrpc_symlink(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1858 ap->a_target, vap, cnp->cn_cred, cnp->cn_thread, &dnfsva,
1859 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
1860 if (nfhp) {
1861 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
1862 &np, NULL);
1863 if (!ret)
1864 newvp = NFSTOV(np);
1865 else if (!error)
1866 error = ret;
1867 }
1868 if (newvp != NULL) {
1869 if (attrflag)
1870 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1871 0, 1);
1872 } else if (!error) {
1873 /*
1874 * If we do not have an error and we could not extract the
1875 * newvp from the response due to the request being NFSv2, we
1876 * have to do a lookup in order to obtain a newvp to return.
1877 */
1878 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1879 cnp->cn_cred, cnp->cn_thread, &np);
1880 if (!error)
1881 newvp = NFSTOV(np);
1882 }
1883 if (error) {
1884 if (newvp)
1885 vput(newvp);
1886 if (NFS_ISV4(dvp))
1887 error = nfscl_maperr(cnp->cn_thread, error,
1888 vap->va_uid, vap->va_gid);
1889 } else {
1890 /*
1891 * If negative lookup caching is enabled, I might as well
1892 * add an entry for this node. Not necessary for correctness,
1893 * but if negative caching is enabled, then the system
1894 * must care about lookup caching hit rate, so...
1895 */
1896 if (newnfs_neglookup_enable != 0 &&
1897 (cnp->cn_flags & MAKEENTRY))
1898 cache_enter(dvp, newvp, cnp);
1899 *ap->a_vpp = newvp;
1900 }
1901
1902 dnp = VTONFS(dvp);
1903 mtx_lock(&dnp->n_mtx);
1904 dnp->n_flag |= NMODIFIED;
1905 mtx_unlock(&dnp->n_mtx);
1906 if (dattrflag)
1907 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1908 else
1909 dnp->n_attrstamp = 0;
1910 return (error);
1911}
1912
1913/*
1914 * nfs make dir call
1915 */
1916static int
1917nfs_mkdir(struct vop_mkdir_args *ap)
1918{
1919 struct vnode *dvp = ap->a_dvp;
1920 struct vattr *vap = ap->a_vap;
1921 struct componentname *cnp = ap->a_cnp;
1922 struct nfsnode *np = NULL, *dnp;
1923 struct vnode *newvp = NULL;
1924 struct vattr vattr;
1925 struct nfsfh *nfhp;
1926 struct nfsvattr nfsva, dnfsva;
1927 int error = 0, attrflag, dattrflag, ret;
1928
1929 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1930 return (error);
1931 vap->va_type = VDIR;
1932 error = nfsrpc_mkdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1933 vap, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &nfhp,
1934 &attrflag, &dattrflag, NULL);
1935 dnp = VTONFS(dvp);
1936 mtx_lock(&dnp->n_mtx);
1937 dnp->n_flag |= NMODIFIED;
1938 mtx_unlock(&dnp->n_mtx);
1939 if (dattrflag)
1940 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1941 else
1942 dnp->n_attrstamp = 0;
1943 if (nfhp) {
1944 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
1945 &np, NULL);
1946 if (!ret) {
1947 newvp = NFSTOV(np);
1948 if (attrflag)
1949 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
1950 NULL, 0, 1);
1951 } else if (!error)
1952 error = ret;
1953 }
1954 if (!error && newvp == NULL) {
1955 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1956 cnp->cn_cred, cnp->cn_thread, &np);
1957 if (!error) {
1958 newvp = NFSTOV(np);
1959 if (newvp->v_type != VDIR)
1960 error = EEXIST;
1961 }
1962 }
1963 if (error) {
1964 if (newvp)
1965 vput(newvp);
1966 if (NFS_ISV4(dvp))
1967 error = nfscl_maperr(cnp->cn_thread, error,
1968 vap->va_uid, vap->va_gid);
1969 } else {
1970 /*
1971 * If negative lookup caching is enabled, I might as well
1972 * add an entry for this node. Not necessary for correctness,
1973 * but if negative caching is enabled, then the system
1974 * must care about lookup caching hit rate, so...
1975 */
1976 if (newnfs_neglookup_enable != 0 &&
1977 (cnp->cn_flags & MAKEENTRY))
1978 cache_enter(dvp, newvp, cnp);
1979 *ap->a_vpp = newvp;
1980 }
1981 return (error);
1982}
1983
1984/*
1985 * nfs remove directory call
1986 */
1987static int
1988nfs_rmdir(struct vop_rmdir_args *ap)
1989{
1990 struct vnode *vp = ap->a_vp;
1991 struct vnode *dvp = ap->a_dvp;
1992 struct componentname *cnp = ap->a_cnp;
1993 struct nfsnode *dnp;
1994 struct nfsvattr dnfsva;
1995 int error, dattrflag;
1996
1997 if (dvp == vp)
1998 return (EINVAL);
1999 error = nfsrpc_rmdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2000 cnp->cn_cred, cnp->cn_thread, &dnfsva, &dattrflag, NULL);
2001 dnp = VTONFS(dvp);
2002 mtx_lock(&dnp->n_mtx);
2003 dnp->n_flag |= NMODIFIED;
2004 mtx_unlock(&dnp->n_mtx);
2005 if (dattrflag)
2006 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2007 else
2008 dnp->n_attrstamp = 0;
2009
2010 cache_purge(dvp);
2011 cache_purge(vp);
2012 if (error && NFS_ISV4(dvp))
2013 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
2014 (gid_t)0);
2015 /*
2016 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2017 */
2018 if (error == ENOENT)
2019 error = 0;
2020 return (error);
2021}
2022
2023/*
2024 * nfs readdir call
2025 */
2026static int
2027nfs_readdir(struct vop_readdir_args *ap)
2028{
2029 struct vnode *vp = ap->a_vp;
2030 struct nfsnode *np = VTONFS(vp);
2031 struct uio *uio = ap->a_uio;
2032 int tresid, error = 0;
2033 struct vattr vattr;
2034
2035 if (vp->v_type != VDIR)
2036 return(EPERM);
2037
2038 /*
2039 * First, check for hit on the EOF offset cache
2040 */
2041 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2042 (np->n_flag & NMODIFIED) == 0) {
2043 if (VOP_GETATTR(vp, &vattr, ap->a_cred) == 0) {
2044 mtx_lock(&np->n_mtx);
2045 if ((NFS_ISV4(vp) && np->n_change == vattr.va_filerev) ||
2046 !NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
2047 mtx_unlock(&np->n_mtx);
2048 NFSINCRGLOBAL(newnfsstats.direofcache_hits);
2049 return (0);
2050 } else
2051 mtx_unlock(&np->n_mtx);
2052 }
2053 }
2054
2055 /*
2056 * Call ncl_bioread() to do the real work.
2057 */
2058 tresid = uio->uio_resid;
2059 error = ncl_bioread(vp, uio, 0, ap->a_cred);
2060
2061 if (!error && uio->uio_resid == tresid)
2062 NFSINCRGLOBAL(newnfsstats.direofcache_misses);
2063 return (error);
2064}
2065
2066/*
2067 * Readdir rpc call.
2068 * Called from below the buffer cache by ncl_doio().
2069 */
2070int
2071ncl_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2072 struct thread *td)
2073{
2074 struct nfsvattr nfsva;
2075 nfsuint64 *cookiep, cookie;
2076 struct nfsnode *dnp = VTONFS(vp);
2077 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2078 int error = 0, eof, attrflag;
2079
2080#ifndef DIAGNOSTIC
2081 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2082 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2083 panic("nfs readdirrpc bad uio");
2084#endif
2085
2086 /*
2087 * If there is no cookie, assume directory was stale.
2088 */
2089 ncl_dircookie_lock(dnp);
2090 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2091 if (cookiep) {
2092 cookie = *cookiep;
2093 ncl_dircookie_unlock(dnp);
2094 } else {
2095 ncl_dircookie_unlock(dnp);
2096 return (NFSERR_BAD_COOKIE);
2097 }
2098
2099 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2100 (void)ncl_fsinfo(nmp, vp, cred, td);
2101
2102 error = nfsrpc_readdir(vp, uiop, &cookie, cred, td, &nfsva,
2103 &attrflag, &eof, NULL);
2104 if (attrflag)
2105 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2106
2107 if (!error) {
2108 /*
2109 * We are now either at the end of the directory or have filled
2110 * the block.
2111 */
2112 if (eof)
2113 dnp->n_direofoffset = uiop->uio_offset;
2114 else {
2115 if (uiop->uio_resid > 0)
2116 ncl_printf("EEK! readdirrpc resid > 0\n");
2117 ncl_dircookie_lock(dnp);
2118 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2119 *cookiep = cookie;
2120 ncl_dircookie_unlock(dnp);
2121 }
2122 } else if (NFS_ISV4(vp)) {
2123 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2124 }
2125 return (error);
2126}
2127
2128/*
2129 * NFS V3 readdir plus RPC. Used in place of ncl_readdirrpc().
2130 */
2131int
2132ncl_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2133 struct thread *td)
2134{
2135 struct nfsvattr nfsva;
2136 nfsuint64 *cookiep, cookie;
2137 struct nfsnode *dnp = VTONFS(vp);
2138 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2139 int error = 0, attrflag, eof;
2140
2141#ifndef DIAGNOSTIC
2142 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2143 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2144 panic("nfs readdirplusrpc bad uio");
2145#endif
2146
2147 /*
2148 * If there is no cookie, assume directory was stale.
2149 */
2150 ncl_dircookie_lock(dnp);
2151 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2152 if (cookiep) {
2153 cookie = *cookiep;
2154 ncl_dircookie_unlock(dnp);
2155 } else {
2156 ncl_dircookie_unlock(dnp);
2157 return (NFSERR_BAD_COOKIE);
2158 }
2159
2160 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2161 (void)ncl_fsinfo(nmp, vp, cred, td);
2162 error = nfsrpc_readdirplus(vp, uiop, &cookie, cred, td, &nfsva,
2163 &attrflag, &eof, NULL);
2164 if (attrflag)
2165 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2166
2167 if (!error) {
2168 /*
2169 * We are now either at end of the directory or have filled the
2170 * the block.
2171 */
2172 if (eof)
2173 dnp->n_direofoffset = uiop->uio_offset;
2174 else {
2175 if (uiop->uio_resid > 0)
2176 ncl_printf("EEK! readdirplusrpc resid > 0\n");
2177 ncl_dircookie_lock(dnp);
2178 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2179 *cookiep = cookie;
2180 ncl_dircookie_unlock(dnp);
2181 }
2182 } else if (NFS_ISV4(vp)) {
2183 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2184 }
2185 return (error);
2186}
2187
2188/*
2189 * Silly rename. To make the NFS filesystem that is stateless look a little
2190 * more like the "ufs" a remove of an active vnode is translated to a rename
2191 * to a funny looking filename that is removed by nfs_inactive on the
2192 * nfsnode. There is the potential for another process on a different client
2193 * to create the same funny name between the nfs_lookitup() fails and the
2194 * nfs_rename() completes, but...
2195 */
2196static int
2197nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
2198{
2199 struct sillyrename *sp;
2200 struct nfsnode *np;
2201 int error;
2202 short pid;
2203 unsigned int lticks;
2204
2205 cache_purge(dvp);
2206 np = VTONFS(vp);
2207#ifndef DIAGNOSTIC
2208 if (vp->v_type == VDIR)
2209 panic("nfs: sillyrename dir");
2210#endif
2211 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2212 M_NEWNFSREQ, M_WAITOK);
2213 sp->s_cred = crhold(cnp->cn_cred);
2214 sp->s_dvp = dvp;
2215 VREF(dvp);
2216
2217 /*
2218 * Fudge together a funny name.
2219 * Changing the format of the funny name to accomodate more
2220 * sillynames per directory.
2221 * The name is now changed to .nfs.<ticks>.<pid>.4, where ticks is
2222 * CPU ticks since boot.
2223 */
2224 pid = cnp->cn_thread->td_proc->p_pid;
2225 lticks = (unsigned int)ticks;
2226 for ( ; ; ) {
2227 sp->s_namlen = sprintf(sp->s_name,
2228 ".nfs.%08x.%04x4.4", lticks,
2229 pid);
2230 if (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2231 cnp->cn_thread, NULL))
2232 break;
2233 lticks++;
2234 }
2235 error = nfs_renameit(dvp, vp, cnp, sp);
2236 if (error)
2237 goto bad;
2238 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2239 cnp->cn_thread, &np);
2240 np->n_sillyrename = sp;
2241 return (0);
2242bad:
2243 vrele(sp->s_dvp);
2244 crfree(sp->s_cred);
2245 free((caddr_t)sp, M_NEWNFSREQ);
2246 return (error);
2247}
2248
2249/*
2250 * Look up a file name and optionally either update the file handle or
2251 * allocate an nfsnode, depending on the value of npp.
2252 * npp == NULL --> just do the lookup
2253 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2254 * handled too
2255 * *npp != NULL --> update the file handle in the vnode
2256 */
2257static int
2258nfs_lookitup(struct vnode *dvp, char *name, int len, struct ucred *cred,
2259 struct thread *td, struct nfsnode **npp)
2260{
2261 struct vnode *newvp = NULL, *vp;
2262 struct nfsnode *np, *dnp = VTONFS(dvp);
2263 struct nfsfh *nfhp, *onfhp;
2264 struct nfsvattr nfsva, dnfsva;
2265 struct componentname cn;
2266 int error = 0, attrflag, dattrflag;
2267 u_int hash;
2268
2269 error = nfsrpc_lookup(dvp, name, len, cred, td, &dnfsva, &nfsva,
2270 &nfhp, &attrflag, &dattrflag, NULL);
2271 if (dattrflag)
2272 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2273 if (npp && !error) {
2274 if (*npp != NULL) {
2275 np = *npp;
2276 vp = NFSTOV(np);
2277 /*
2278 * For NFSv4, check to see if it is the same name and
2279 * replace the name, if it is different.
2280 */
2281 if (np->n_v4 != NULL && nfsva.na_type == VREG &&
2282 (np->n_v4->n4_namelen != len ||
2283 NFSBCMP(name, NFS4NODENAME(np->n_v4), len) ||
2284 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
2285 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2286 dnp->n_fhp->nfh_len))) {
2287#ifdef notdef
2288{ char nnn[100]; int nnnl;
2289nnnl = (len < 100) ? len : 99;
2290bcopy(name, nnn, nnnl);
2291nnn[nnnl] = '\0';
2292printf("replace=%s\n",nnn);
2293}
2294#endif
2295 FREE((caddr_t)np->n_v4, M_NFSV4NODE);
2296 MALLOC(np->n_v4, struct nfsv4node *,
2297 sizeof (struct nfsv4node) +
2298 dnp->n_fhp->nfh_len + len - 1,
2299 M_NFSV4NODE, M_WAITOK);
2300 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len;
2301 np->n_v4->n4_namelen = len;
2302 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2303 dnp->n_fhp->nfh_len);
2304 NFSBCOPY(name, NFS4NODENAME(np->n_v4), len);
2305 }
2306 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len,
2307 FNV1_32_INIT);
2308 onfhp = np->n_fhp;
2309 /*
2310 * Rehash node for new file handle.
2311 */
2312 vfs_hash_rehash(vp, hash);
2313 np->n_fhp = nfhp;
2314 if (onfhp != NULL)
2315 FREE((caddr_t)onfhp, M_NFSFH);
2316 newvp = NFSTOV(np);
2317 } else if (NFS_CMPFH(dnp, nfhp->nfh_fh, nfhp->nfh_len)) {
2318 FREE((caddr_t)nfhp, M_NFSFH);
2319 VREF(dvp);
2320 newvp = dvp;
2321 } else {
2322 cn.cn_nameptr = name;
2323 cn.cn_namelen = len;
2324 error = nfscl_nget(dvp->v_mount, dvp, nfhp, &cn, td,
2325 &np, NULL);
2326 if (error)
2327 return (error);
2328 newvp = NFSTOV(np);
2329 }
2330 if (!attrflag && *npp == NULL) {
2331 vrele(newvp);
2332 return (ENOENT);
2333 }
2334 if (attrflag)
2335 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
2336 0, 1);
2337 }
2338 if (npp && *npp == NULL) {
2339 if (error) {
2340 if (newvp) {
2341 if (newvp == dvp)
2342 vrele(newvp);
2343 else
2344 vput(newvp);
2345 }
2346 } else
2347 *npp = np;
2348 }
2349 if (error && NFS_ISV4(dvp))
2350 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2351 return (error);
2352}
2353
2354/*
2355 * Nfs Version 3 and 4 commit rpc
2356 */
2357int
2358ncl_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred,
2359 struct thread *td)
2360{
2361 struct nfsvattr nfsva;
2362 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2363 int error, attrflag;
2364 u_char verf[NFSX_VERF];
2365
2366 mtx_lock(&nmp->nm_mtx);
2367 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) {
2368 mtx_unlock(&nmp->nm_mtx);
2369 return (0);
2370 }
2371 mtx_unlock(&nmp->nm_mtx);
2372 error = nfsrpc_commit(vp, offset, cnt, cred, td, verf, &nfsva,
2373 &attrflag, NULL);
2374 if (!error) {
2375 if (NFSBCMP((caddr_t)nmp->nm_verf, verf, NFSX_VERF)) {
2376 NFSBCOPY(verf, (caddr_t)nmp->nm_verf, NFSX_VERF);
2377 error = NFSERR_STALEWRITEVERF;
2378 }
2379 if (!error && attrflag)
2380 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL,
2381 0, 1);
2382 } else if (NFS_ISV4(vp)) {
2383 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2384 }
2385 return (error);
2386}
2387
2388/*
2389 * Strategy routine.
2390 * For async requests when nfsiod(s) are running, queue the request by
2391 * calling ncl_asyncio(), otherwise just all ncl_doio() to do the
2392 * request.
2393 */
2394static int
2395nfs_strategy(struct vop_strategy_args *ap)
2396{
2397 struct buf *bp = ap->a_bp;
2398 struct ucred *cr;
2399
2400 KASSERT(!(bp->b_flags & B_DONE),
2401 ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
2402 BUF_ASSERT_HELD(bp);
2403
2404 if (bp->b_iocmd == BIO_READ)
2405 cr = bp->b_rcred;
2406 else
2407 cr = bp->b_wcred;
2408
2409 /*
2410 * If the op is asynchronous and an i/o daemon is waiting
2411 * queue the request, wake it up and wait for completion
2412 * otherwise just do it ourselves.
2413 */
2414 if ((bp->b_flags & B_ASYNC) == 0 ||
2415 ncl_asyncio(VFSTONFS(ap->a_vp->v_mount), bp, NOCRED, curthread))
2416 (void)ncl_doio(ap->a_vp, bp, cr, curthread);
2417 return (0);
2418}
2419
2420/*
2421 * fsync vnode op. Just call ncl_flush() with commit == 1.
2422 */
2423/* ARGSUSED */
2424static int
2425nfs_fsync(struct vop_fsync_args *ap)
2426{
2427 return (ncl_flush(ap->a_vp, ap->a_waitfor, NULL, ap->a_td, 1));
2428}
2429
2430/*
2431 * Flush all the blocks associated with a vnode.
2432 * Walk through the buffer pool and push any dirty pages
2433 * associated with the vnode.
2434 */
2435int
2436ncl_flush(struct vnode *vp, int waitfor, struct ucred *cred, struct thread *td,
2437 int commit)
2438{
2439 struct nfsnode *np = VTONFS(vp);
2440 struct buf *bp;
2441 int i;
2442 struct buf *nbp;
2443 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2444 int error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2445 int passone = 1, trycnt = 0;
2446 u_quad_t off, endoff, toff;
2447 struct ucred* wcred = NULL;
2448 struct buf **bvec = NULL;
2449 struct bufobj *bo;
2450#ifndef NFS_COMMITBVECSIZ
2451#define NFS_COMMITBVECSIZ 20
2452#endif
2453 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2454 int bvecsize = 0, bveccount;
2455
2456 if (nmp->nm_flag & NFSMNT_INT)
2457 slpflag = NFS_PCATCH;
2458 if (!commit)
2459 passone = 0;
2460 bo = &vp->v_bufobj;
2461 /*
2462 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2463 * server, but has not been committed to stable storage on the server
2464 * yet. On the first pass, the byte range is worked out and the commit
2465 * rpc is done. On the second pass, ncl_writebp() is called to do the
2466 * job.
2467 */
2468again:
2469 off = (u_quad_t)-1;
2470 endoff = 0;
2471 bvecpos = 0;
2472 if (NFS_ISV34(vp) && commit) {
2473 if (bvec != NULL && bvec != bvec_on_stack)
2474 free(bvec, M_TEMP);
2475 /*
2476 * Count up how many buffers waiting for a commit.
2477 */
2478 bveccount = 0;
2479 BO_LOCK(bo);
2480 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2481 if (!BUF_ISLOCKED(bp) &&
2482 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2483 == (B_DELWRI | B_NEEDCOMMIT))
2484 bveccount++;
2485 }
2486 /*
2487 * Allocate space to remember the list of bufs to commit. It is
2488 * important to use M_NOWAIT here to avoid a race with nfs_write.
2489 * If we can't get memory (for whatever reason), we will end up
2490 * committing the buffers one-by-one in the loop below.
2491 */
2492 if (bveccount > NFS_COMMITBVECSIZ) {
2493 /*
2494 * Release the vnode interlock to avoid a lock
2495 * order reversal.
2496 */
2497 BO_UNLOCK(bo);
2498 bvec = (struct buf **)
2499 malloc(bveccount * sizeof(struct buf *),
2500 M_TEMP, M_NOWAIT);
2501 BO_LOCK(bo);
2502 if (bvec == NULL) {
2503 bvec = bvec_on_stack;
2504 bvecsize = NFS_COMMITBVECSIZ;
2505 } else
2506 bvecsize = bveccount;
2507 } else {
2508 bvec = bvec_on_stack;
2509 bvecsize = NFS_COMMITBVECSIZ;
2510 }
2511 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2512 if (bvecpos >= bvecsize)
2513 break;
2514 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2515 nbp = TAILQ_NEXT(bp, b_bobufs);
2516 continue;
2517 }
2518 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2519 (B_DELWRI | B_NEEDCOMMIT)) {
2520 BUF_UNLOCK(bp);
2521 nbp = TAILQ_NEXT(bp, b_bobufs);
2522 continue;
2523 }
2524 BO_UNLOCK(bo);
2525 bremfree(bp);
2526 /*
2527 * Work out if all buffers are using the same cred
2528 * so we can deal with them all with one commit.
2529 *
2530 * NOTE: we are not clearing B_DONE here, so we have
2531 * to do it later on in this routine if we intend to
2532 * initiate I/O on the bp.
2533 *
2534 * Note: to avoid loopback deadlocks, we do not
2535 * assign b_runningbufspace.
2536 */
2537 if (wcred == NULL)
2538 wcred = bp->b_wcred;
2539 else if (wcred != bp->b_wcred)
2540 wcred = NOCRED;
2541 vfs_busy_pages(bp, 1);
2542
2543 BO_LOCK(bo);
2544 /*
2545 * bp is protected by being locked, but nbp is not
2546 * and vfs_busy_pages() may sleep. We have to
2547 * recalculate nbp.
2548 */
2549 nbp = TAILQ_NEXT(bp, b_bobufs);
2550
2551 /*
2552 * A list of these buffers is kept so that the
2553 * second loop knows which buffers have actually
2554 * been committed. This is necessary, since there
2555 * may be a race between the commit rpc and new
2556 * uncommitted writes on the file.
2557 */
2558 bvec[bvecpos++] = bp;
2559 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2560 bp->b_dirtyoff;
2561 if (toff < off)
2562 off = toff;
2563 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2564 if (toff > endoff)
2565 endoff = toff;
2566 }
2567 BO_UNLOCK(bo);
2568 }
2569 if (bvecpos > 0) {
2570 /*
2571 * Commit data on the server, as required.
2572 * If all bufs are using the same wcred, then use that with
2573 * one call for all of them, otherwise commit each one
2574 * separately.
2575 */
2576 if (wcred != NOCRED)
2577 retv = ncl_commit(vp, off, (int)(endoff - off),
2578 wcred, td);
2579 else {
2580 retv = 0;
2581 for (i = 0; i < bvecpos; i++) {
2582 off_t off, size;
2583 bp = bvec[i];
2584 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2585 bp->b_dirtyoff;
2586 size = (u_quad_t)(bp->b_dirtyend
2587 - bp->b_dirtyoff);
2588 retv = ncl_commit(vp, off, (int)size,
2589 bp->b_wcred, td);
2590 if (retv) break;
2591 }
2592 }
2593
2594 if (retv == NFSERR_STALEWRITEVERF)
2595 ncl_clearcommit(vp->v_mount);
2596
2597 /*
2598 * Now, either mark the blocks I/O done or mark the
2599 * blocks dirty, depending on whether the commit
2600 * succeeded.
2601 */
2602 for (i = 0; i < bvecpos; i++) {
2603 bp = bvec[i];
2604 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
2605 if (retv) {
2606 /*
2607 * Error, leave B_DELWRI intact
2608 */
2609 vfs_unbusy_pages(bp);
2610 brelse(bp);
2611 } else {
2612 /*
2613 * Success, remove B_DELWRI ( bundirty() ).
2614 *
2615 * b_dirtyoff/b_dirtyend seem to be NFS
2616 * specific. We should probably move that
2617 * into bundirty(). XXX
2618 */
2619 bufobj_wref(bo);
2620 bp->b_flags |= B_ASYNC;
2621 bundirty(bp);
2622 bp->b_flags &= ~B_DONE;
2623 bp->b_ioflags &= ~BIO_ERROR;
2624 bp->b_dirtyoff = bp->b_dirtyend = 0;
2625 bufdone(bp);
2626 }
2627 }
2628 }
2629
2630 /*
2631 * Start/do any write(s) that are required.
2632 */
2633loop:
2634 BO_LOCK(bo);
2635 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2636 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2637 if (waitfor != MNT_WAIT || passone)
2638 continue;
2639
2640 error = BUF_TIMELOCK(bp,
2641 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK,
2642 BO_MTX(bo), "nfsfsync", slpflag, slptimeo);
2643 if (error == 0) {
2644 BUF_UNLOCK(bp);
2645 goto loop;
2646 }
2647 if (error == ENOLCK) {
2648 error = 0;
2649 goto loop;
2650 }
2651 if (newnfs_sigintr(nmp, td)) {
2652 error = EINTR;
2653 goto done;
2654 }
2655 if (slpflag & PCATCH) {
2656 slpflag = 0;
2657 slptimeo = 2 * hz;
2658 }
2659 goto loop;
2660 }
2661 if ((bp->b_flags & B_DELWRI) == 0)
2662 panic("nfs_fsync: not dirty");
2663 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
2664 BUF_UNLOCK(bp);
2665 continue;
2666 }
2667 BO_UNLOCK(bo);
2668 bremfree(bp);
2669 if (passone || !commit)
2670 bp->b_flags |= B_ASYNC;
2671 else
2672 bp->b_flags |= B_ASYNC;
2673 bwrite(bp);
2674 if (newnfs_sigintr(nmp, td)) {
2675 error = EINTR;
2676 goto done;
2677 }
2678 goto loop;
2679 }
2680 if (passone) {
2681 passone = 0;
2682 BO_UNLOCK(bo);
2683 goto again;
2684 }
2685 if (waitfor == MNT_WAIT) {
2686 while (bo->bo_numoutput) {
2687 error = bufobj_wwait(bo, slpflag, slptimeo);
2688 if (error) {
2689 BO_UNLOCK(bo);
2690 error = newnfs_sigintr(nmp, td);
2691 if (error)
2692 goto done;
2693 if (slpflag & PCATCH) {
2694 slpflag = 0;
2695 slptimeo = 2 * hz;
2696 }
2697 BO_LOCK(bo);
2698 }
2699 }
2700 if (bo->bo_dirty.bv_cnt != 0 && commit) {
2701 BO_UNLOCK(bo);
2702 goto loop;
2703 }
2704 /*
2705 * Wait for all the async IO requests to drain
2706 */
2707 BO_UNLOCK(bo);
2708 mtx_lock(&np->n_mtx);
2709 while (np->n_directio_asyncwr > 0) {
2710 np->n_flag |= NFSYNCWAIT;
2711 error = ncl_msleep(td, (caddr_t)&np->n_directio_asyncwr,
2712 &np->n_mtx, slpflag | (PRIBIO + 1),
2713 "nfsfsync", 0);
2714 if (error) {
2715 if (newnfs_sigintr(nmp, td)) {
2716 mtx_unlock(&np->n_mtx);
2717 error = EINTR;
2718 goto done;
2719 }
2720 }
2721 }
2722 mtx_unlock(&np->n_mtx);
2723 } else
2724 BO_UNLOCK(bo);
2725 mtx_lock(&np->n_mtx);
2726 if (np->n_flag & NWRITEERR) {
2727 error = np->n_error;
2728 np->n_flag &= ~NWRITEERR;
2729 }
2730 if (commit && bo->bo_dirty.bv_cnt == 0 &&
2731 bo->bo_numoutput == 0 && np->n_directio_asyncwr == 0)
2732 np->n_flag &= ~NMODIFIED;
2733 mtx_unlock(&np->n_mtx);
2734done:
2735 if (bvec != NULL && bvec != bvec_on_stack)
2736 free(bvec, M_TEMP);
2737 if (error == 0 && commit != 0 && waitfor == MNT_WAIT &&
2738 (bo->bo_dirty.bv_cnt != 0 || bo->bo_numoutput != 0 ||
2739 np->n_directio_asyncwr != 0) && trycnt++ < 5) {
2740 /* try, try again... */
2741 passone = 1;
2742 wcred = NULL;
2743 bvec = NULL;
2744 bvecsize = 0;
2745printf("try%d\n", trycnt);
2746 goto again;
2747 }
2748 return (error);
2749}
2750
2751/*
2752 * NFS advisory byte-level locks.
2753 */
2754static int
2755nfs_advlock(struct vop_advlock_args *ap)
2756{
2757 struct vnode *vp = ap->a_vp;
2758 struct ucred *cred;
2759 struct nfsnode *np = VTONFS(ap->a_vp);
2760 struct proc *p = (struct proc *)ap->a_id;
2761 struct thread *td = curthread; /* XXX */
2762 struct vattr va;
2763 int ret, error = EOPNOTSUPP;
2764 u_quad_t size;
2765
2766 if (NFS_ISV4(vp) && (ap->a_flags & F_POSIX)) {
2767 cred = p->p_ucred;
2768 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
2769 if (vp->v_iflag & VI_DOOMED) {
2770 VOP_UNLOCK(vp, 0);
2771 return (EBADF);
2772 }
2773
2774 /*
2775 * If this is unlocking a write locked region, flush and
2776 * commit them before unlocking. This is required by
2777 * RFC3530 Sec. 9.3.2.
2778 */
2779 if (ap->a_op == F_UNLCK &&
2780 nfscl_checkwritelocked(vp, ap->a_fl, cred, td))
2781 (void) ncl_flush(vp, MNT_WAIT, cred, td, 1);
2782
2783 /*
2784 * Loop around doing the lock op, while a blocking lock
2785 * must wait for the lock op to succeed.
2786 */
2787 do {
2788 ret = nfsrpc_advlock(vp, np->n_size, ap->a_op,
2789 ap->a_fl, 0, cred, td);
2790 if (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
2791 ap->a_op == F_SETLK) {
2792 VOP_UNLOCK(vp, 0);
2793 error = nfs_catnap(PZERO | PCATCH, "ncladvl");
2794 if (error)
2795 return (EINTR);
2796 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
2797 if (vp->v_iflag & VI_DOOMED) {
2798 VOP_UNLOCK(vp, 0);
2799 return (EBADF);
2800 }
2801 }
2802 } while (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
2803 ap->a_op == F_SETLK);
2804 if (ret == NFSERR_DENIED) {
2805 VOP_UNLOCK(vp, 0);
2806 return (EAGAIN);
2807 } else if (ret == EINVAL || ret == EBADF || ret == EINTR) {
2808 VOP_UNLOCK(vp, 0);
2809 return (ret);
2810 } else if (ret != 0) {
2811 VOP_UNLOCK(vp, 0);
2812 return (EACCES);
2813 }
2814
2815 /*
2816 * Now, if we just got a lock, invalidate data in the buffer
2817 * cache, as required, so that the coherency conforms with
2818 * RFC3530 Sec. 9.3.2.
2819 */
2820 if (ap->a_op == F_SETLK) {
2821 if ((np->n_flag & NMODIFIED) == 0) {
2822 np->n_attrstamp = 0;
2823 ret = VOP_GETATTR(vp, &va, cred);
2824 }
2825 if ((np->n_flag & NMODIFIED) || ret ||
2826 np->n_change != va.va_filerev) {
2827 (void) ncl_vinvalbuf(vp, V_SAVE, td, 1);
2828 np->n_attrstamp = 0;
2829 ret = VOP_GETATTR(vp, &va, cred);
2830 if (!ret) {
2831 np->n_mtime = va.va_mtime;
2832 np->n_change = va.va_filerev;
2833 }
2834 }
2835 }
2836 VOP_UNLOCK(vp, 0);
2837 return (0);
2838 } else if (!NFS_ISV4(vp)) {
2839 error = vn_lock(vp, LK_SHARED);
2840 if (error)
2841 return (error);
2842 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
2843 size = VTONFS(vp)->n_size;
2844 VOP_UNLOCK(vp, 0);
2845 error = lf_advlock(ap, &(vp->v_lockf), size);
2846 } else {
2847 if (ncl_advlock_p)
2848 error = ncl_advlock_p(ap);
2849 else
2850 error = ENOLCK;
2851 }
2852 }
2853 return (error);
2854}
2855
2856/*
2857 * NFS advisory byte-level locks.
2858 */
2859static int
2860nfs_advlockasync(struct vop_advlockasync_args *ap)
2861{
2862 struct vnode *vp = ap->a_vp;
2863 u_quad_t size;
2864 int error;
2865
2866 if (NFS_ISV4(vp))
2867 return (EOPNOTSUPP);
2868 error = vn_lock(vp, LK_SHARED);
2869 if (error)
2870 return (error);
2871 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
2872 size = VTONFS(vp)->n_size;
2873 VOP_UNLOCK(vp, 0);
2874 error = lf_advlockasync(ap, &(vp->v_lockf), size);
2875 } else {
2876 VOP_UNLOCK(vp, 0);
2877 error = EOPNOTSUPP;
2878 }
2879 return (error);
2880}
2881
2882/*
2883 * Print out the contents of an nfsnode.
2884 */
2885static int
2886nfs_print(struct vop_print_args *ap)
2887{
2888 struct vnode *vp = ap->a_vp;
2889 struct nfsnode *np = VTONFS(vp);
2890
2891 ncl_printf("\tfileid %ld fsid 0x%x",
2892 np->n_vattr.na_fileid, np->n_vattr.na_fsid);
2893 if (vp->v_type == VFIFO)
2894 fifo_printinfo(vp);
2895 printf("\n");
2896 return (0);
2897}
2898
2899/*
2900 * This is the "real" nfs::bwrite(struct buf*).
2901 * We set B_CACHE if this is a VMIO buffer.
2902 */
2903int
2904ncl_writebp(struct buf *bp, int force __unused, struct thread *td)
2905{
2906 int s;
2907 int oldflags = bp->b_flags;
2908#if 0
2909 int retv = 1;
2910 off_t off;
2911#endif
2912
2913 BUF_ASSERT_HELD(bp);
2914
2915 if (bp->b_flags & B_INVAL) {
2916 brelse(bp);
2917 return(0);
2918 }
2919
2920 bp->b_flags |= B_CACHE;
2921
2922 /*
2923 * Undirty the bp. We will redirty it later if the I/O fails.
2924 */
2925
2926 s = splbio();
2927 bundirty(bp);
2928 bp->b_flags &= ~B_DONE;
2929 bp->b_ioflags &= ~BIO_ERROR;
2930 bp->b_iocmd = BIO_WRITE;
2931
2932 bufobj_wref(bp->b_bufobj);
2933 curthread->td_ru.ru_oublock++;
2934 splx(s);
2935
2936 /*
2937 * Note: to avoid loopback deadlocks, we do not
2938 * assign b_runningbufspace.
2939 */
2940 vfs_busy_pages(bp, 1);
2941
2942 BUF_KERNPROC(bp);
2943 bp->b_iooffset = dbtob(bp->b_blkno);
2944 bstrategy(bp);
2945
2946 if( (oldflags & B_ASYNC) == 0) {
2947 int rtval = bufwait(bp);
2948
2949 if (oldflags & B_DELWRI) {
2950 s = splbio();
2951 reassignbuf(bp);
2952 splx(s);
2953 }
2954 brelse(bp);
2955 return (rtval);
2956 }
2957
2958 return (0);
2959}
2960
2961/*
2962 * nfs special file access vnode op.
2963 * Essentially just get vattr and then imitate iaccess() since the device is
2964 * local to the client.
2965 */
2966static int
2967nfsspec_access(struct vop_access_args *ap)
2968{
2969 struct vattr *vap;
2970 struct ucred *cred = ap->a_cred;
2971 struct vnode *vp = ap->a_vp;
2972 accmode_t accmode = ap->a_accmode;
2973 struct vattr vattr;
2974 int error;
2975
2976 /*
2977 * Disallow write attempts on filesystems mounted read-only;
2978 * unless the file is a socket, fifo, or a block or character
2979 * device resident on the filesystem.
2980 */
2981 if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
2982 switch (vp->v_type) {
2983 case VREG:
2984 case VDIR:
2985 case VLNK:
2986 return (EROFS);
2987 default:
2988 break;
2989 }
2990 }
2991 vap = &vattr;
2992 error = VOP_GETATTR(vp, vap, cred);
2993 if (error)
2994 goto out;
2995 error = vaccess(vp->v_type, vap->va_mode, vap->va_uid, vap->va_gid,
2996 accmode, cred, NULL);
2997out:
2998 return error;
2999}
3000
3001/*
3002 * Read wrapper for fifos.
3003 */
3004static int
3005nfsfifo_read(struct vop_read_args *ap)
3006{
3007 struct nfsnode *np = VTONFS(ap->a_vp);
3008 int error;
3009
3010 /*
3011 * Set access flag.
3012 */
3013 mtx_lock(&np->n_mtx);
3014 np->n_flag |= NACC;
3015 getnanotime(&np->n_atim);
3016 mtx_unlock(&np->n_mtx);
3017 error = fifo_specops.vop_read(ap);
3018 return error;
3019}
3020
3021/*
3022 * Write wrapper for fifos.
3023 */
3024static int
3025nfsfifo_write(struct vop_write_args *ap)
3026{
3027 struct nfsnode *np = VTONFS(ap->a_vp);
3028
3029 /*
3030 * Set update flag.
3031 */
3032 mtx_lock(&np->n_mtx);
3033 np->n_flag |= NUPD;
3034 getnanotime(&np->n_mtim);
3035 mtx_unlock(&np->n_mtx);
3036 return(fifo_specops.vop_write(ap));
3037}
3038
3039/*
3040 * Close wrapper for fifos.
3041 *
3042 * Update the times on the nfsnode then do fifo close.
3043 */
3044static int
3045nfsfifo_close(struct vop_close_args *ap)
3046{
3047 struct vnode *vp = ap->a_vp;
3048 struct nfsnode *np = VTONFS(vp);
3049 struct vattr vattr;
3050 struct timespec ts;
3051
3052 mtx_lock(&np->n_mtx);
3053 if (np->n_flag & (NACC | NUPD)) {
3054 getnanotime(&ts);
3055 if (np->n_flag & NACC)
3056 np->n_atim = ts;
3057 if (np->n_flag & NUPD)
3058 np->n_mtim = ts;
3059 np->n_flag |= NCHG;
3060 if (vrefcnt(vp) == 1 &&
3061 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3062 VATTR_NULL(&vattr);
3063 if (np->n_flag & NACC)
3064 vattr.va_atime = np->n_atim;
3065 if (np->n_flag & NUPD)
3066 vattr.va_mtime = np->n_mtim;
3067 mtx_unlock(&np->n_mtx);
3068 (void)VOP_SETATTR(vp, &vattr, ap->a_cred);
3069 goto out;
3070 }
3071 }
3072 mtx_unlock(&np->n_mtx);
3073out:
3074 return (fifo_specops.vop_close(ap));
3075}
3076
3077/*
3078 * Just call ncl_writebp() with the force argument set to 1.
3079 *
3080 * NOTE: B_DONE may or may not be set in a_bp on call.
3081 */
3082static int
3083nfs_bwrite(struct buf *bp)
3084{
3085
3086 return (ncl_writebp(bp, 1, curthread));
3087}
3088
3089struct buf_ops buf_ops_newnfs = {
3090 .bop_name = "buf_ops_nfs",
3091 .bop_write = nfs_bwrite,
3092 .bop_strategy = bufstrategy,
3093 .bop_sync = bufsync,
3094 .bop_bdflush = bufbdflush,
3095};
3096
3097/*
3098 * Cloned from vop_stdlock(), and then the ugly hack added.
3099 */
3100static int
3101nfs_lock1(struct vop_lock1_args *ap)
3102{
3103 struct vnode *vp = ap->a_vp;
3104 int error = 0;
3105
3106 /*
3107 * Since vfs_hash_get() calls vget() and it will no longer work
3108 * for FreeBSD8 with flags == 0, I can only think of this horrible
3109 * hack to work around it. I call vfs_hash_get() with LK_EXCLOTHER
3110 * and then handle it here. All I want for this case is a v_usecount
3111 * on the vnode to use for recovery, while another thread might
3112 * hold a lock on the vnode. I have the other threads blocked, so
3113 * there isn't any race problem.
3114 */
3115 if ((ap->a_flags & LK_TYPE_MASK) == LK_EXCLOTHER) {
3116 if ((ap->a_flags & LK_INTERLOCK) == 0)
3117 panic("ncllock1");
3118 if ((vp->v_iflag & VI_DOOMED))
3119 error = ENOENT;
3120 VI_UNLOCK(vp);
3121 return (error);
3122 }
3123 return (_lockmgr_args(vp->v_vnlock, ap->a_flags, VI_MTX(vp),
3124 LK_WMESG_DEFAULT, LK_PRIO_DEFAULT, LK_TIMO_DEFAULT, ap->a_file,
3125 ap->a_line));
3126}
3127
3128#ifdef NFS4_ACL_EXTATTR_NAME
3129static int
3130nfs_getacl(struct vop_getacl_args *ap)
3131{
3132 int error;
3133
3134 if (ap->a_type != ACL_TYPE_NFS4)
3135 return (EOPNOTSUPP);
3136 error = nfsrpc_getacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3137 NULL);
3138 if (error > NFSERR_STALE) {
3139 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3140 error = EPERM;
3141 }
3142 return (error);
3143}
3144
3145static int
3146nfs_setacl(struct vop_setacl_args *ap)
3147{
3148 int error;
3149
3150 if (ap->a_type != ACL_TYPE_NFS4)
3151 return (EOPNOTSUPP);
3152 error = nfsrpc_setacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3153 NULL);
3154 if (error > NFSERR_STALE) {
3155 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3156 error = EPERM;
3157 }
3158 return (error);
3159}
3160
3161#endif /* NFS4_ACL_EXTATTR_NAME */
| 1421 error = nfsrpc_create(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1422 vap, cverf, fmode, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva,
1423 &nfhp, &attrflag, &dattrflag, NULL);
1424 if (!error) {
1425 if (nfhp == NULL)
1426 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
1427 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread,
1428 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1429 NULL);
1430 if (nfhp != NULL)
1431 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
1432 cnp->cn_thread, &np, NULL);
1433 }
1434 if (dattrflag)
1435 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1436 if (!error) {
1437 newvp = NFSTOV(np);
1438 if (attrflag)
1439 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1440 0, 1);
1441 }
1442 if (error) {
1443 if (newvp != NULL) {
1444 vrele(newvp);
1445 newvp = NULL;
1446 }
1447 if (NFS_ISV34(dvp) && (fmode & O_EXCL) &&
1448 error == NFSERR_NOTSUPP) {
1449 fmode &= ~O_EXCL;
1450 goto again;
1451 }
1452 } else if (NFS_ISV34(dvp) && (fmode & O_EXCL)) {
1453 if (nfscl_checksattr(vap, &nfsva)) {
1454 error = nfsrpc_setattr(newvp, vap, NULL, cnp->cn_cred,
1455 cnp->cn_thread, &nfsva, &attrflag, NULL);
1456 if (error && (vap->va_uid != (uid_t)VNOVAL ||
1457 vap->va_gid != (gid_t)VNOVAL)) {
1458 /* try again without setting uid/gid */
1459 vap->va_uid = (uid_t)VNOVAL;
1460 vap->va_gid = (uid_t)VNOVAL;
1461 error = nfsrpc_setattr(newvp, vap, NULL,
1462 cnp->cn_cred, cnp->cn_thread, &nfsva,
1463 &attrflag, NULL);
1464 }
1465 if (attrflag)
1466 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
1467 NULL, 0, 1);
1468 }
1469 }
1470 if (!error) {
1471 if (cnp->cn_flags & MAKEENTRY)
1472 cache_enter(dvp, newvp, cnp);
1473 *ap->a_vpp = newvp;
1474 } else if (NFS_ISV4(dvp)) {
1475 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1476 vap->va_gid);
1477 }
1478 mtx_lock(&dnp->n_mtx);
1479 dnp->n_flag |= NMODIFIED;
1480 if (!dattrflag)
1481 dnp->n_attrstamp = 0;
1482 mtx_unlock(&dnp->n_mtx);
1483 return (error);
1484}
1485
1486/*
1487 * nfs file remove call
1488 * To try and make nfs semantics closer to ufs semantics, a file that has
1489 * other processes using the vnode is renamed instead of removed and then
1490 * removed later on the last close.
1491 * - If v_usecount > 1
1492 * If a rename is not already in the works
1493 * call nfs_sillyrename() to set it up
1494 * else
1495 * do the remove rpc
1496 */
1497static int
1498nfs_remove(struct vop_remove_args *ap)
1499{
1500 struct vnode *vp = ap->a_vp;
1501 struct vnode *dvp = ap->a_dvp;
1502 struct componentname *cnp = ap->a_cnp;
1503 struct nfsnode *np = VTONFS(vp);
1504 int error = 0;
1505 struct vattr vattr;
1506
1507#ifndef DIAGNOSTIC
1508 if ((cnp->cn_flags & HASBUF) == 0)
1509 panic("nfs_remove: no name");
1510 if (vrefcnt(vp) < 1)
1511 panic("nfs_remove: bad v_usecount");
1512#endif
1513 if (vp->v_type == VDIR)
1514 error = EPERM;
1515 else if (vrefcnt(vp) == 1 || (np->n_sillyrename &&
1516 VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 &&
1517 vattr.va_nlink > 1)) {
1518 /*
1519 * Purge the name cache so that the chance of a lookup for
1520 * the name succeeding while the remove is in progress is
1521 * minimized. Without node locking it can still happen, such
1522 * that an I/O op returns ESTALE, but since you get this if
1523 * another host removes the file..
1524 */
1525 cache_purge(vp);
1526 /*
1527 * throw away biocache buffers, mainly to avoid
1528 * unnecessary delayed writes later.
1529 */
1530 error = ncl_vinvalbuf(vp, 0, cnp->cn_thread, 1);
1531 /* Do the rpc */
1532 if (error != EINTR && error != EIO)
1533 error = nfs_removerpc(dvp, vp, cnp->cn_nameptr,
1534 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread);
1535 /*
1536 * Kludge City: If the first reply to the remove rpc is lost..
1537 * the reply to the retransmitted request will be ENOENT
1538 * since the file was in fact removed
1539 * Therefore, we cheat and return success.
1540 */
1541 if (error == ENOENT)
1542 error = 0;
1543 } else if (!np->n_sillyrename)
1544 error = nfs_sillyrename(dvp, vp, cnp);
1545 np->n_attrstamp = 0;
1546 return (error);
1547}
1548
1549/*
1550 * nfs file remove rpc called from nfs_inactive
1551 */
1552int
1553ncl_removeit(struct sillyrename *sp, struct vnode *vp)
1554{
1555 /*
1556 * Make sure that the directory vnode is still valid.
1557 * XXX we should lock sp->s_dvp here.
1558 */
1559 if (sp->s_dvp->v_type == VBAD)
1560 return (0);
1561 return (nfs_removerpc(sp->s_dvp, vp, sp->s_name, sp->s_namlen,
1562 sp->s_cred, NULL));
1563}
1564
1565/*
1566 * Nfs remove rpc, called from nfs_remove() and ncl_removeit().
1567 */
1568static int
1569nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
1570 int namelen, struct ucred *cred, struct thread *td)
1571{
1572 struct nfsvattr dnfsva;
1573 struct nfsnode *dnp = VTONFS(dvp);
1574 int error = 0, dattrflag;
1575
1576 mtx_lock(&dnp->n_mtx);
1577 dnp->n_flag |= NREMOVEINPROG;
1578 mtx_unlock(&dnp->n_mtx);
1579 error = nfsrpc_remove(dvp, name, namelen, vp, cred, td, &dnfsva,
1580 &dattrflag, NULL);
1581 mtx_lock(&dnp->n_mtx);
1582 if ((dnp->n_flag & NREMOVEWANT)) {
1583 dnp->n_flag &= ~(NREMOVEWANT | NREMOVEINPROG);
1584 mtx_unlock(&dnp->n_mtx);
1585 wakeup((caddr_t)dnp);
1586 } else {
1587 dnp->n_flag &= ~NREMOVEINPROG;
1588 mtx_unlock(&dnp->n_mtx);
1589 }
1590 if (dattrflag)
1591 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1592 mtx_lock(&dnp->n_mtx);
1593 dnp->n_flag |= NMODIFIED;
1594 if (!dattrflag)
1595 dnp->n_attrstamp = 0;
1596 mtx_unlock(&dnp->n_mtx);
1597 if (error && NFS_ISV4(dvp))
1598 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1599 return (error);
1600}
1601
1602/*
1603 * nfs file rename call
1604 */
1605static int
1606nfs_rename(struct vop_rename_args *ap)
1607{
1608 struct vnode *fvp = ap->a_fvp;
1609 struct vnode *tvp = ap->a_tvp;
1610 struct vnode *fdvp = ap->a_fdvp;
1611 struct vnode *tdvp = ap->a_tdvp;
1612 struct componentname *tcnp = ap->a_tcnp;
1613 struct componentname *fcnp = ap->a_fcnp;
1614 struct nfsnode *fnp = VTONFS(ap->a_fvp);
1615 struct nfsnode *tdnp = VTONFS(ap->a_tdvp);
1616 struct nfsv4node *newv4 = NULL;
1617 int error;
1618
1619#ifndef DIAGNOSTIC
1620 if ((tcnp->cn_flags & HASBUF) == 0 ||
1621 (fcnp->cn_flags & HASBUF) == 0)
1622 panic("nfs_rename: no name");
1623#endif
1624 /* Check for cross-device rename */
1625 if ((fvp->v_mount != tdvp->v_mount) ||
1626 (tvp && (fvp->v_mount != tvp->v_mount))) {
1627 error = EXDEV;
1628 goto out;
1629 }
1630
1631 if (fvp == tvp) {
1632 ncl_printf("nfs_rename: fvp == tvp (can't happen)\n");
1633 error = 0;
1634 goto out;
1635 }
1636 if ((error = vn_lock(fvp, LK_EXCLUSIVE)))
1637 goto out;
1638
1639 /*
1640 * We have to flush B_DELWRI data prior to renaming
1641 * the file. If we don't, the delayed-write buffers
1642 * can be flushed out later after the file has gone stale
1643 * under NFSV3. NFSV2 does not have this problem because
1644 * ( as far as I can tell ) it flushes dirty buffers more
1645 * often.
1646 *
1647 * Skip the rename operation if the fsync fails, this can happen
1648 * due to the server's volume being full, when we pushed out data
1649 * that was written back to our cache earlier. Not checking for
1650 * this condition can result in potential (silent) data loss.
1651 */
1652 error = VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_thread);
1653 VOP_UNLOCK(fvp, 0);
1654 if (!error && tvp)
1655 error = VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_thread);
1656 if (error)
1657 goto out;
1658
1659 /*
1660 * If the tvp exists and is in use, sillyrename it before doing the
1661 * rename of the new file over it.
1662 * XXX Can't sillyrename a directory.
1663 */
1664 if (tvp && vrefcnt(tvp) > 1 && !VTONFS(tvp)->n_sillyrename &&
1665 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1666 vput(tvp);
1667 tvp = NULL;
1668 }
1669
1670 error = nfs_renamerpc(fdvp, fvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1671 tdvp, tvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1672 tcnp->cn_thread);
1673
1674 if (!error) {
1675 /*
1676 * For NFSv4, check to see if it is the same name and
1677 * replace the name, if it is different.
1678 */
1679 MALLOC(newv4, struct nfsv4node *,
1680 sizeof (struct nfsv4node) +
1681 tdnp->n_fhp->nfh_len + tcnp->cn_namelen - 1,
1682 M_NFSV4NODE, M_WAITOK);
1683 mtx_lock(&tdnp->n_mtx);
1684 mtx_lock(&fnp->n_mtx);
1685 if (fnp->n_v4 != NULL && fvp->v_type == VREG &&
1686 (fnp->n_v4->n4_namelen != tcnp->cn_namelen ||
1687 NFSBCMP(tcnp->cn_nameptr, NFS4NODENAME(fnp->n_v4),
1688 tcnp->cn_namelen) ||
1689 tdnp->n_fhp->nfh_len != fnp->n_v4->n4_fhlen ||
1690 NFSBCMP(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1691 tdnp->n_fhp->nfh_len))) {
1692#ifdef notdef
1693{ char nnn[100]; int nnnl;
1694nnnl = (tcnp->cn_namelen < 100) ? tcnp->cn_namelen : 99;
1695bcopy(tcnp->cn_nameptr, nnn, nnnl);
1696nnn[nnnl] = '\0';
1697printf("ren replace=%s\n",nnn);
1698}
1699#endif
1700 FREE((caddr_t)fnp->n_v4, M_NFSV4NODE);
1701 fnp->n_v4 = newv4;
1702 newv4 = NULL;
1703 fnp->n_v4->n4_fhlen = tdnp->n_fhp->nfh_len;
1704 fnp->n_v4->n4_namelen = tcnp->cn_namelen;
1705 NFSBCOPY(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1706 tdnp->n_fhp->nfh_len);
1707 NFSBCOPY(tcnp->cn_nameptr,
1708 NFS4NODENAME(fnp->n_v4), tcnp->cn_namelen);
1709 }
1710 mtx_unlock(&tdnp->n_mtx);
1711 mtx_unlock(&fnp->n_mtx);
1712 if (newv4 != NULL)
1713 FREE((caddr_t)newv4, M_NFSV4NODE);
1714 }
1715
1716 if (fvp->v_type == VDIR) {
1717 if (tvp != NULL && tvp->v_type == VDIR)
1718 cache_purge(tdvp);
1719 cache_purge(fdvp);
1720 }
1721
1722out:
1723 if (tdvp == tvp)
1724 vrele(tdvp);
1725 else
1726 vput(tdvp);
1727 if (tvp)
1728 vput(tvp);
1729 vrele(fdvp);
1730 vrele(fvp);
1731 /*
1732 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1733 */
1734 if (error == ENOENT)
1735 error = 0;
1736 return (error);
1737}
1738
1739/*
1740 * nfs file rename rpc called from nfs_remove() above
1741 */
1742static int
1743nfs_renameit(struct vnode *sdvp, struct vnode *svp, struct componentname *scnp,
1744 struct sillyrename *sp)
1745{
1746
1747 return (nfs_renamerpc(sdvp, svp, scnp->cn_nameptr, scnp->cn_namelen,
1748 sdvp, NULL, sp->s_name, sp->s_namlen, scnp->cn_cred,
1749 scnp->cn_thread));
1750}
1751
1752/*
1753 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1754 */
1755static int
1756nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, char *fnameptr,
1757 int fnamelen, struct vnode *tdvp, struct vnode *tvp, char *tnameptr,
1758 int tnamelen, struct ucred *cred, struct thread *td)
1759{
1760 struct nfsvattr fnfsva, tnfsva;
1761 struct nfsnode *fdnp = VTONFS(fdvp);
1762 struct nfsnode *tdnp = VTONFS(tdvp);
1763 int error = 0, fattrflag, tattrflag;
1764
1765 error = nfsrpc_rename(fdvp, fvp, fnameptr, fnamelen, tdvp, tvp,
1766 tnameptr, tnamelen, cred, td, &fnfsva, &tnfsva, &fattrflag,
1767 &tattrflag, NULL, NULL);
1768 mtx_lock(&fdnp->n_mtx);
1769 fdnp->n_flag |= NMODIFIED;
1770 mtx_unlock(&fdnp->n_mtx);
1771 mtx_lock(&tdnp->n_mtx);
1772 tdnp->n_flag |= NMODIFIED;
1773 mtx_unlock(&tdnp->n_mtx);
1774 if (fattrflag)
1775 (void) nfscl_loadattrcache(&fdvp, &fnfsva, NULL, NULL, 0, 1);
1776 else
1777 fdnp->n_attrstamp = 0;
1778 if (tattrflag)
1779 (void) nfscl_loadattrcache(&tdvp, &tnfsva, NULL, NULL, 0, 1);
1780 else
1781 tdnp->n_attrstamp = 0;
1782 if (error && NFS_ISV4(fdvp))
1783 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1784 return (error);
1785}
1786
1787/*
1788 * nfs hard link create call
1789 */
1790static int
1791nfs_link(struct vop_link_args *ap)
1792{
1793 struct vnode *vp = ap->a_vp;
1794 struct vnode *tdvp = ap->a_tdvp;
1795 struct componentname *cnp = ap->a_cnp;
1796 struct nfsnode *tdnp;
1797 struct nfsvattr nfsva, dnfsva;
1798 int error = 0, attrflag, dattrflag;
1799
1800 if (vp->v_mount != tdvp->v_mount) {
1801 return (EXDEV);
1802 }
1803
1804 /*
1805 * Push all writes to the server, so that the attribute cache
1806 * doesn't get "out of sync" with the server.
1807 * XXX There should be a better way!
1808 */
1809 VOP_FSYNC(vp, MNT_WAIT, cnp->cn_thread);
1810
1811 error = nfsrpc_link(tdvp, vp, cnp->cn_nameptr, cnp->cn_namelen,
1812 cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &attrflag,
1813 &dattrflag, NULL);
1814 tdnp = VTONFS(tdvp);
1815 mtx_lock(&tdnp->n_mtx);
1816 tdnp->n_flag |= NMODIFIED;
1817 mtx_unlock(&tdnp->n_mtx);
1818 if (attrflag)
1819 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1820 else
1821 VTONFS(vp)->n_attrstamp = 0;
1822 if (dattrflag)
1823 (void) nfscl_loadattrcache(&tdvp, &dnfsva, NULL, NULL, 0, 1);
1824 else
1825 tdnp->n_attrstamp = 0;
1826 /*
1827 * If negative lookup caching is enabled, I might as well
1828 * add an entry for this node. Not necessary for correctness,
1829 * but if negative caching is enabled, then the system
1830 * must care about lookup caching hit rate, so...
1831 */
1832 if (newnfs_neglookup_enable != 0 &&
1833 (cnp->cn_flags & MAKEENTRY))
1834 cache_enter(tdvp, vp, cnp);
1835 if (error && NFS_ISV4(vp))
1836 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
1837 (gid_t)0);
1838 return (error);
1839}
1840
1841/*
1842 * nfs symbolic link create call
1843 */
1844static int
1845nfs_symlink(struct vop_symlink_args *ap)
1846{
1847 struct vnode *dvp = ap->a_dvp;
1848 struct vattr *vap = ap->a_vap;
1849 struct componentname *cnp = ap->a_cnp;
1850 struct nfsvattr nfsva, dnfsva;
1851 struct nfsfh *nfhp;
1852 struct nfsnode *np = NULL, *dnp;
1853 struct vnode *newvp = NULL;
1854 int error = 0, attrflag, dattrflag, ret;
1855
1856 vap->va_type = VLNK;
1857 error = nfsrpc_symlink(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1858 ap->a_target, vap, cnp->cn_cred, cnp->cn_thread, &dnfsva,
1859 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
1860 if (nfhp) {
1861 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
1862 &np, NULL);
1863 if (!ret)
1864 newvp = NFSTOV(np);
1865 else if (!error)
1866 error = ret;
1867 }
1868 if (newvp != NULL) {
1869 if (attrflag)
1870 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1871 0, 1);
1872 } else if (!error) {
1873 /*
1874 * If we do not have an error and we could not extract the
1875 * newvp from the response due to the request being NFSv2, we
1876 * have to do a lookup in order to obtain a newvp to return.
1877 */
1878 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1879 cnp->cn_cred, cnp->cn_thread, &np);
1880 if (!error)
1881 newvp = NFSTOV(np);
1882 }
1883 if (error) {
1884 if (newvp)
1885 vput(newvp);
1886 if (NFS_ISV4(dvp))
1887 error = nfscl_maperr(cnp->cn_thread, error,
1888 vap->va_uid, vap->va_gid);
1889 } else {
1890 /*
1891 * If negative lookup caching is enabled, I might as well
1892 * add an entry for this node. Not necessary for correctness,
1893 * but if negative caching is enabled, then the system
1894 * must care about lookup caching hit rate, so...
1895 */
1896 if (newnfs_neglookup_enable != 0 &&
1897 (cnp->cn_flags & MAKEENTRY))
1898 cache_enter(dvp, newvp, cnp);
1899 *ap->a_vpp = newvp;
1900 }
1901
1902 dnp = VTONFS(dvp);
1903 mtx_lock(&dnp->n_mtx);
1904 dnp->n_flag |= NMODIFIED;
1905 mtx_unlock(&dnp->n_mtx);
1906 if (dattrflag)
1907 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1908 else
1909 dnp->n_attrstamp = 0;
1910 return (error);
1911}
1912
1913/*
1914 * nfs make dir call
1915 */
1916static int
1917nfs_mkdir(struct vop_mkdir_args *ap)
1918{
1919 struct vnode *dvp = ap->a_dvp;
1920 struct vattr *vap = ap->a_vap;
1921 struct componentname *cnp = ap->a_cnp;
1922 struct nfsnode *np = NULL, *dnp;
1923 struct vnode *newvp = NULL;
1924 struct vattr vattr;
1925 struct nfsfh *nfhp;
1926 struct nfsvattr nfsva, dnfsva;
1927 int error = 0, attrflag, dattrflag, ret;
1928
1929 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1930 return (error);
1931 vap->va_type = VDIR;
1932 error = nfsrpc_mkdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1933 vap, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &nfhp,
1934 &attrflag, &dattrflag, NULL);
1935 dnp = VTONFS(dvp);
1936 mtx_lock(&dnp->n_mtx);
1937 dnp->n_flag |= NMODIFIED;
1938 mtx_unlock(&dnp->n_mtx);
1939 if (dattrflag)
1940 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1941 else
1942 dnp->n_attrstamp = 0;
1943 if (nfhp) {
1944 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
1945 &np, NULL);
1946 if (!ret) {
1947 newvp = NFSTOV(np);
1948 if (attrflag)
1949 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
1950 NULL, 0, 1);
1951 } else if (!error)
1952 error = ret;
1953 }
1954 if (!error && newvp == NULL) {
1955 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1956 cnp->cn_cred, cnp->cn_thread, &np);
1957 if (!error) {
1958 newvp = NFSTOV(np);
1959 if (newvp->v_type != VDIR)
1960 error = EEXIST;
1961 }
1962 }
1963 if (error) {
1964 if (newvp)
1965 vput(newvp);
1966 if (NFS_ISV4(dvp))
1967 error = nfscl_maperr(cnp->cn_thread, error,
1968 vap->va_uid, vap->va_gid);
1969 } else {
1970 /*
1971 * If negative lookup caching is enabled, I might as well
1972 * add an entry for this node. Not necessary for correctness,
1973 * but if negative caching is enabled, then the system
1974 * must care about lookup caching hit rate, so...
1975 */
1976 if (newnfs_neglookup_enable != 0 &&
1977 (cnp->cn_flags & MAKEENTRY))
1978 cache_enter(dvp, newvp, cnp);
1979 *ap->a_vpp = newvp;
1980 }
1981 return (error);
1982}
1983
1984/*
1985 * nfs remove directory call
1986 */
1987static int
1988nfs_rmdir(struct vop_rmdir_args *ap)
1989{
1990 struct vnode *vp = ap->a_vp;
1991 struct vnode *dvp = ap->a_dvp;
1992 struct componentname *cnp = ap->a_cnp;
1993 struct nfsnode *dnp;
1994 struct nfsvattr dnfsva;
1995 int error, dattrflag;
1996
1997 if (dvp == vp)
1998 return (EINVAL);
1999 error = nfsrpc_rmdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2000 cnp->cn_cred, cnp->cn_thread, &dnfsva, &dattrflag, NULL);
2001 dnp = VTONFS(dvp);
2002 mtx_lock(&dnp->n_mtx);
2003 dnp->n_flag |= NMODIFIED;
2004 mtx_unlock(&dnp->n_mtx);
2005 if (dattrflag)
2006 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2007 else
2008 dnp->n_attrstamp = 0;
2009
2010 cache_purge(dvp);
2011 cache_purge(vp);
2012 if (error && NFS_ISV4(dvp))
2013 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
2014 (gid_t)0);
2015 /*
2016 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2017 */
2018 if (error == ENOENT)
2019 error = 0;
2020 return (error);
2021}
2022
2023/*
2024 * nfs readdir call
2025 */
2026static int
2027nfs_readdir(struct vop_readdir_args *ap)
2028{
2029 struct vnode *vp = ap->a_vp;
2030 struct nfsnode *np = VTONFS(vp);
2031 struct uio *uio = ap->a_uio;
2032 int tresid, error = 0;
2033 struct vattr vattr;
2034
2035 if (vp->v_type != VDIR)
2036 return(EPERM);
2037
2038 /*
2039 * First, check for hit on the EOF offset cache
2040 */
2041 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2042 (np->n_flag & NMODIFIED) == 0) {
2043 if (VOP_GETATTR(vp, &vattr, ap->a_cred) == 0) {
2044 mtx_lock(&np->n_mtx);
2045 if ((NFS_ISV4(vp) && np->n_change == vattr.va_filerev) ||
2046 !NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
2047 mtx_unlock(&np->n_mtx);
2048 NFSINCRGLOBAL(newnfsstats.direofcache_hits);
2049 return (0);
2050 } else
2051 mtx_unlock(&np->n_mtx);
2052 }
2053 }
2054
2055 /*
2056 * Call ncl_bioread() to do the real work.
2057 */
2058 tresid = uio->uio_resid;
2059 error = ncl_bioread(vp, uio, 0, ap->a_cred);
2060
2061 if (!error && uio->uio_resid == tresid)
2062 NFSINCRGLOBAL(newnfsstats.direofcache_misses);
2063 return (error);
2064}
2065
2066/*
2067 * Readdir rpc call.
2068 * Called from below the buffer cache by ncl_doio().
2069 */
2070int
2071ncl_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2072 struct thread *td)
2073{
2074 struct nfsvattr nfsva;
2075 nfsuint64 *cookiep, cookie;
2076 struct nfsnode *dnp = VTONFS(vp);
2077 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2078 int error = 0, eof, attrflag;
2079
2080#ifndef DIAGNOSTIC
2081 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2082 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2083 panic("nfs readdirrpc bad uio");
2084#endif
2085
2086 /*
2087 * If there is no cookie, assume directory was stale.
2088 */
2089 ncl_dircookie_lock(dnp);
2090 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2091 if (cookiep) {
2092 cookie = *cookiep;
2093 ncl_dircookie_unlock(dnp);
2094 } else {
2095 ncl_dircookie_unlock(dnp);
2096 return (NFSERR_BAD_COOKIE);
2097 }
2098
2099 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2100 (void)ncl_fsinfo(nmp, vp, cred, td);
2101
2102 error = nfsrpc_readdir(vp, uiop, &cookie, cred, td, &nfsva,
2103 &attrflag, &eof, NULL);
2104 if (attrflag)
2105 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2106
2107 if (!error) {
2108 /*
2109 * We are now either at the end of the directory or have filled
2110 * the block.
2111 */
2112 if (eof)
2113 dnp->n_direofoffset = uiop->uio_offset;
2114 else {
2115 if (uiop->uio_resid > 0)
2116 ncl_printf("EEK! readdirrpc resid > 0\n");
2117 ncl_dircookie_lock(dnp);
2118 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2119 *cookiep = cookie;
2120 ncl_dircookie_unlock(dnp);
2121 }
2122 } else if (NFS_ISV4(vp)) {
2123 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2124 }
2125 return (error);
2126}
2127
2128/*
2129 * NFS V3 readdir plus RPC. Used in place of ncl_readdirrpc().
2130 */
2131int
2132ncl_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2133 struct thread *td)
2134{
2135 struct nfsvattr nfsva;
2136 nfsuint64 *cookiep, cookie;
2137 struct nfsnode *dnp = VTONFS(vp);
2138 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2139 int error = 0, attrflag, eof;
2140
2141#ifndef DIAGNOSTIC
2142 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2143 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2144 panic("nfs readdirplusrpc bad uio");
2145#endif
2146
2147 /*
2148 * If there is no cookie, assume directory was stale.
2149 */
2150 ncl_dircookie_lock(dnp);
2151 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2152 if (cookiep) {
2153 cookie = *cookiep;
2154 ncl_dircookie_unlock(dnp);
2155 } else {
2156 ncl_dircookie_unlock(dnp);
2157 return (NFSERR_BAD_COOKIE);
2158 }
2159
2160 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2161 (void)ncl_fsinfo(nmp, vp, cred, td);
2162 error = nfsrpc_readdirplus(vp, uiop, &cookie, cred, td, &nfsva,
2163 &attrflag, &eof, NULL);
2164 if (attrflag)
2165 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2166
2167 if (!error) {
2168 /*
2169 * We are now either at end of the directory or have filled the
2170 * the block.
2171 */
2172 if (eof)
2173 dnp->n_direofoffset = uiop->uio_offset;
2174 else {
2175 if (uiop->uio_resid > 0)
2176 ncl_printf("EEK! readdirplusrpc resid > 0\n");
2177 ncl_dircookie_lock(dnp);
2178 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2179 *cookiep = cookie;
2180 ncl_dircookie_unlock(dnp);
2181 }
2182 } else if (NFS_ISV4(vp)) {
2183 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2184 }
2185 return (error);
2186}
2187
2188/*
2189 * Silly rename. To make the NFS filesystem that is stateless look a little
2190 * more like the "ufs" a remove of an active vnode is translated to a rename
2191 * to a funny looking filename that is removed by nfs_inactive on the
2192 * nfsnode. There is the potential for another process on a different client
2193 * to create the same funny name between the nfs_lookitup() fails and the
2194 * nfs_rename() completes, but...
2195 */
2196static int
2197nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
2198{
2199 struct sillyrename *sp;
2200 struct nfsnode *np;
2201 int error;
2202 short pid;
2203 unsigned int lticks;
2204
2205 cache_purge(dvp);
2206 np = VTONFS(vp);
2207#ifndef DIAGNOSTIC
2208 if (vp->v_type == VDIR)
2209 panic("nfs: sillyrename dir");
2210#endif
2211 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2212 M_NEWNFSREQ, M_WAITOK);
2213 sp->s_cred = crhold(cnp->cn_cred);
2214 sp->s_dvp = dvp;
2215 VREF(dvp);
2216
2217 /*
2218 * Fudge together a funny name.
2219 * Changing the format of the funny name to accomodate more
2220 * sillynames per directory.
2221 * The name is now changed to .nfs.<ticks>.<pid>.4, where ticks is
2222 * CPU ticks since boot.
2223 */
2224 pid = cnp->cn_thread->td_proc->p_pid;
2225 lticks = (unsigned int)ticks;
2226 for ( ; ; ) {
2227 sp->s_namlen = sprintf(sp->s_name,
2228 ".nfs.%08x.%04x4.4", lticks,
2229 pid);
2230 if (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2231 cnp->cn_thread, NULL))
2232 break;
2233 lticks++;
2234 }
2235 error = nfs_renameit(dvp, vp, cnp, sp);
2236 if (error)
2237 goto bad;
2238 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2239 cnp->cn_thread, &np);
2240 np->n_sillyrename = sp;
2241 return (0);
2242bad:
2243 vrele(sp->s_dvp);
2244 crfree(sp->s_cred);
2245 free((caddr_t)sp, M_NEWNFSREQ);
2246 return (error);
2247}
2248
2249/*
2250 * Look up a file name and optionally either update the file handle or
2251 * allocate an nfsnode, depending on the value of npp.
2252 * npp == NULL --> just do the lookup
2253 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2254 * handled too
2255 * *npp != NULL --> update the file handle in the vnode
2256 */
2257static int
2258nfs_lookitup(struct vnode *dvp, char *name, int len, struct ucred *cred,
2259 struct thread *td, struct nfsnode **npp)
2260{
2261 struct vnode *newvp = NULL, *vp;
2262 struct nfsnode *np, *dnp = VTONFS(dvp);
2263 struct nfsfh *nfhp, *onfhp;
2264 struct nfsvattr nfsva, dnfsva;
2265 struct componentname cn;
2266 int error = 0, attrflag, dattrflag;
2267 u_int hash;
2268
2269 error = nfsrpc_lookup(dvp, name, len, cred, td, &dnfsva, &nfsva,
2270 &nfhp, &attrflag, &dattrflag, NULL);
2271 if (dattrflag)
2272 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2273 if (npp && !error) {
2274 if (*npp != NULL) {
2275 np = *npp;
2276 vp = NFSTOV(np);
2277 /*
2278 * For NFSv4, check to see if it is the same name and
2279 * replace the name, if it is different.
2280 */
2281 if (np->n_v4 != NULL && nfsva.na_type == VREG &&
2282 (np->n_v4->n4_namelen != len ||
2283 NFSBCMP(name, NFS4NODENAME(np->n_v4), len) ||
2284 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
2285 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2286 dnp->n_fhp->nfh_len))) {
2287#ifdef notdef
2288{ char nnn[100]; int nnnl;
2289nnnl = (len < 100) ? len : 99;
2290bcopy(name, nnn, nnnl);
2291nnn[nnnl] = '\0';
2292printf("replace=%s\n",nnn);
2293}
2294#endif
2295 FREE((caddr_t)np->n_v4, M_NFSV4NODE);
2296 MALLOC(np->n_v4, struct nfsv4node *,
2297 sizeof (struct nfsv4node) +
2298 dnp->n_fhp->nfh_len + len - 1,
2299 M_NFSV4NODE, M_WAITOK);
2300 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len;
2301 np->n_v4->n4_namelen = len;
2302 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2303 dnp->n_fhp->nfh_len);
2304 NFSBCOPY(name, NFS4NODENAME(np->n_v4), len);
2305 }
2306 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len,
2307 FNV1_32_INIT);
2308 onfhp = np->n_fhp;
2309 /*
2310 * Rehash node for new file handle.
2311 */
2312 vfs_hash_rehash(vp, hash);
2313 np->n_fhp = nfhp;
2314 if (onfhp != NULL)
2315 FREE((caddr_t)onfhp, M_NFSFH);
2316 newvp = NFSTOV(np);
2317 } else if (NFS_CMPFH(dnp, nfhp->nfh_fh, nfhp->nfh_len)) {
2318 FREE((caddr_t)nfhp, M_NFSFH);
2319 VREF(dvp);
2320 newvp = dvp;
2321 } else {
2322 cn.cn_nameptr = name;
2323 cn.cn_namelen = len;
2324 error = nfscl_nget(dvp->v_mount, dvp, nfhp, &cn, td,
2325 &np, NULL);
2326 if (error)
2327 return (error);
2328 newvp = NFSTOV(np);
2329 }
2330 if (!attrflag && *npp == NULL) {
2331 vrele(newvp);
2332 return (ENOENT);
2333 }
2334 if (attrflag)
2335 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
2336 0, 1);
2337 }
2338 if (npp && *npp == NULL) {
2339 if (error) {
2340 if (newvp) {
2341 if (newvp == dvp)
2342 vrele(newvp);
2343 else
2344 vput(newvp);
2345 }
2346 } else
2347 *npp = np;
2348 }
2349 if (error && NFS_ISV4(dvp))
2350 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2351 return (error);
2352}
2353
2354/*
2355 * Nfs Version 3 and 4 commit rpc
2356 */
2357int
2358ncl_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred,
2359 struct thread *td)
2360{
2361 struct nfsvattr nfsva;
2362 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2363 int error, attrflag;
2364 u_char verf[NFSX_VERF];
2365
2366 mtx_lock(&nmp->nm_mtx);
2367 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) {
2368 mtx_unlock(&nmp->nm_mtx);
2369 return (0);
2370 }
2371 mtx_unlock(&nmp->nm_mtx);
2372 error = nfsrpc_commit(vp, offset, cnt, cred, td, verf, &nfsva,
2373 &attrflag, NULL);
2374 if (!error) {
2375 if (NFSBCMP((caddr_t)nmp->nm_verf, verf, NFSX_VERF)) {
2376 NFSBCOPY(verf, (caddr_t)nmp->nm_verf, NFSX_VERF);
2377 error = NFSERR_STALEWRITEVERF;
2378 }
2379 if (!error && attrflag)
2380 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL,
2381 0, 1);
2382 } else if (NFS_ISV4(vp)) {
2383 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2384 }
2385 return (error);
2386}
2387
2388/*
2389 * Strategy routine.
2390 * For async requests when nfsiod(s) are running, queue the request by
2391 * calling ncl_asyncio(), otherwise just all ncl_doio() to do the
2392 * request.
2393 */
2394static int
2395nfs_strategy(struct vop_strategy_args *ap)
2396{
2397 struct buf *bp = ap->a_bp;
2398 struct ucred *cr;
2399
2400 KASSERT(!(bp->b_flags & B_DONE),
2401 ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
2402 BUF_ASSERT_HELD(bp);
2403
2404 if (bp->b_iocmd == BIO_READ)
2405 cr = bp->b_rcred;
2406 else
2407 cr = bp->b_wcred;
2408
2409 /*
2410 * If the op is asynchronous and an i/o daemon is waiting
2411 * queue the request, wake it up and wait for completion
2412 * otherwise just do it ourselves.
2413 */
2414 if ((bp->b_flags & B_ASYNC) == 0 ||
2415 ncl_asyncio(VFSTONFS(ap->a_vp->v_mount), bp, NOCRED, curthread))
2416 (void)ncl_doio(ap->a_vp, bp, cr, curthread);
2417 return (0);
2418}
2419
2420/*
2421 * fsync vnode op. Just call ncl_flush() with commit == 1.
2422 */
2423/* ARGSUSED */
2424static int
2425nfs_fsync(struct vop_fsync_args *ap)
2426{
2427 return (ncl_flush(ap->a_vp, ap->a_waitfor, NULL, ap->a_td, 1));
2428}
2429
2430/*
2431 * Flush all the blocks associated with a vnode.
2432 * Walk through the buffer pool and push any dirty pages
2433 * associated with the vnode.
2434 */
2435int
2436ncl_flush(struct vnode *vp, int waitfor, struct ucred *cred, struct thread *td,
2437 int commit)
2438{
2439 struct nfsnode *np = VTONFS(vp);
2440 struct buf *bp;
2441 int i;
2442 struct buf *nbp;
2443 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2444 int error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2445 int passone = 1, trycnt = 0;
2446 u_quad_t off, endoff, toff;
2447 struct ucred* wcred = NULL;
2448 struct buf **bvec = NULL;
2449 struct bufobj *bo;
2450#ifndef NFS_COMMITBVECSIZ
2451#define NFS_COMMITBVECSIZ 20
2452#endif
2453 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2454 int bvecsize = 0, bveccount;
2455
2456 if (nmp->nm_flag & NFSMNT_INT)
2457 slpflag = NFS_PCATCH;
2458 if (!commit)
2459 passone = 0;
2460 bo = &vp->v_bufobj;
2461 /*
2462 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2463 * server, but has not been committed to stable storage on the server
2464 * yet. On the first pass, the byte range is worked out and the commit
2465 * rpc is done. On the second pass, ncl_writebp() is called to do the
2466 * job.
2467 */
2468again:
2469 off = (u_quad_t)-1;
2470 endoff = 0;
2471 bvecpos = 0;
2472 if (NFS_ISV34(vp) && commit) {
2473 if (bvec != NULL && bvec != bvec_on_stack)
2474 free(bvec, M_TEMP);
2475 /*
2476 * Count up how many buffers waiting for a commit.
2477 */
2478 bveccount = 0;
2479 BO_LOCK(bo);
2480 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2481 if (!BUF_ISLOCKED(bp) &&
2482 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2483 == (B_DELWRI | B_NEEDCOMMIT))
2484 bveccount++;
2485 }
2486 /*
2487 * Allocate space to remember the list of bufs to commit. It is
2488 * important to use M_NOWAIT here to avoid a race with nfs_write.
2489 * If we can't get memory (for whatever reason), we will end up
2490 * committing the buffers one-by-one in the loop below.
2491 */
2492 if (bveccount > NFS_COMMITBVECSIZ) {
2493 /*
2494 * Release the vnode interlock to avoid a lock
2495 * order reversal.
2496 */
2497 BO_UNLOCK(bo);
2498 bvec = (struct buf **)
2499 malloc(bveccount * sizeof(struct buf *),
2500 M_TEMP, M_NOWAIT);
2501 BO_LOCK(bo);
2502 if (bvec == NULL) {
2503 bvec = bvec_on_stack;
2504 bvecsize = NFS_COMMITBVECSIZ;
2505 } else
2506 bvecsize = bveccount;
2507 } else {
2508 bvec = bvec_on_stack;
2509 bvecsize = NFS_COMMITBVECSIZ;
2510 }
2511 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2512 if (bvecpos >= bvecsize)
2513 break;
2514 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2515 nbp = TAILQ_NEXT(bp, b_bobufs);
2516 continue;
2517 }
2518 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2519 (B_DELWRI | B_NEEDCOMMIT)) {
2520 BUF_UNLOCK(bp);
2521 nbp = TAILQ_NEXT(bp, b_bobufs);
2522 continue;
2523 }
2524 BO_UNLOCK(bo);
2525 bremfree(bp);
2526 /*
2527 * Work out if all buffers are using the same cred
2528 * so we can deal with them all with one commit.
2529 *
2530 * NOTE: we are not clearing B_DONE here, so we have
2531 * to do it later on in this routine if we intend to
2532 * initiate I/O on the bp.
2533 *
2534 * Note: to avoid loopback deadlocks, we do not
2535 * assign b_runningbufspace.
2536 */
2537 if (wcred == NULL)
2538 wcred = bp->b_wcred;
2539 else if (wcred != bp->b_wcred)
2540 wcred = NOCRED;
2541 vfs_busy_pages(bp, 1);
2542
2543 BO_LOCK(bo);
2544 /*
2545 * bp is protected by being locked, but nbp is not
2546 * and vfs_busy_pages() may sleep. We have to
2547 * recalculate nbp.
2548 */
2549 nbp = TAILQ_NEXT(bp, b_bobufs);
2550
2551 /*
2552 * A list of these buffers is kept so that the
2553 * second loop knows which buffers have actually
2554 * been committed. This is necessary, since there
2555 * may be a race between the commit rpc and new
2556 * uncommitted writes on the file.
2557 */
2558 bvec[bvecpos++] = bp;
2559 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2560 bp->b_dirtyoff;
2561 if (toff < off)
2562 off = toff;
2563 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2564 if (toff > endoff)
2565 endoff = toff;
2566 }
2567 BO_UNLOCK(bo);
2568 }
2569 if (bvecpos > 0) {
2570 /*
2571 * Commit data on the server, as required.
2572 * If all bufs are using the same wcred, then use that with
2573 * one call for all of them, otherwise commit each one
2574 * separately.
2575 */
2576 if (wcred != NOCRED)
2577 retv = ncl_commit(vp, off, (int)(endoff - off),
2578 wcred, td);
2579 else {
2580 retv = 0;
2581 for (i = 0; i < bvecpos; i++) {
2582 off_t off, size;
2583 bp = bvec[i];
2584 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2585 bp->b_dirtyoff;
2586 size = (u_quad_t)(bp->b_dirtyend
2587 - bp->b_dirtyoff);
2588 retv = ncl_commit(vp, off, (int)size,
2589 bp->b_wcred, td);
2590 if (retv) break;
2591 }
2592 }
2593
2594 if (retv == NFSERR_STALEWRITEVERF)
2595 ncl_clearcommit(vp->v_mount);
2596
2597 /*
2598 * Now, either mark the blocks I/O done or mark the
2599 * blocks dirty, depending on whether the commit
2600 * succeeded.
2601 */
2602 for (i = 0; i < bvecpos; i++) {
2603 bp = bvec[i];
2604 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
2605 if (retv) {
2606 /*
2607 * Error, leave B_DELWRI intact
2608 */
2609 vfs_unbusy_pages(bp);
2610 brelse(bp);
2611 } else {
2612 /*
2613 * Success, remove B_DELWRI ( bundirty() ).
2614 *
2615 * b_dirtyoff/b_dirtyend seem to be NFS
2616 * specific. We should probably move that
2617 * into bundirty(). XXX
2618 */
2619 bufobj_wref(bo);
2620 bp->b_flags |= B_ASYNC;
2621 bundirty(bp);
2622 bp->b_flags &= ~B_DONE;
2623 bp->b_ioflags &= ~BIO_ERROR;
2624 bp->b_dirtyoff = bp->b_dirtyend = 0;
2625 bufdone(bp);
2626 }
2627 }
2628 }
2629
2630 /*
2631 * Start/do any write(s) that are required.
2632 */
2633loop:
2634 BO_LOCK(bo);
2635 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2636 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2637 if (waitfor != MNT_WAIT || passone)
2638 continue;
2639
2640 error = BUF_TIMELOCK(bp,
2641 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK,
2642 BO_MTX(bo), "nfsfsync", slpflag, slptimeo);
2643 if (error == 0) {
2644 BUF_UNLOCK(bp);
2645 goto loop;
2646 }
2647 if (error == ENOLCK) {
2648 error = 0;
2649 goto loop;
2650 }
2651 if (newnfs_sigintr(nmp, td)) {
2652 error = EINTR;
2653 goto done;
2654 }
2655 if (slpflag & PCATCH) {
2656 slpflag = 0;
2657 slptimeo = 2 * hz;
2658 }
2659 goto loop;
2660 }
2661 if ((bp->b_flags & B_DELWRI) == 0)
2662 panic("nfs_fsync: not dirty");
2663 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
2664 BUF_UNLOCK(bp);
2665 continue;
2666 }
2667 BO_UNLOCK(bo);
2668 bremfree(bp);
2669 if (passone || !commit)
2670 bp->b_flags |= B_ASYNC;
2671 else
2672 bp->b_flags |= B_ASYNC;
2673 bwrite(bp);
2674 if (newnfs_sigintr(nmp, td)) {
2675 error = EINTR;
2676 goto done;
2677 }
2678 goto loop;
2679 }
2680 if (passone) {
2681 passone = 0;
2682 BO_UNLOCK(bo);
2683 goto again;
2684 }
2685 if (waitfor == MNT_WAIT) {
2686 while (bo->bo_numoutput) {
2687 error = bufobj_wwait(bo, slpflag, slptimeo);
2688 if (error) {
2689 BO_UNLOCK(bo);
2690 error = newnfs_sigintr(nmp, td);
2691 if (error)
2692 goto done;
2693 if (slpflag & PCATCH) {
2694 slpflag = 0;
2695 slptimeo = 2 * hz;
2696 }
2697 BO_LOCK(bo);
2698 }
2699 }
2700 if (bo->bo_dirty.bv_cnt != 0 && commit) {
2701 BO_UNLOCK(bo);
2702 goto loop;
2703 }
2704 /*
2705 * Wait for all the async IO requests to drain
2706 */
2707 BO_UNLOCK(bo);
2708 mtx_lock(&np->n_mtx);
2709 while (np->n_directio_asyncwr > 0) {
2710 np->n_flag |= NFSYNCWAIT;
2711 error = ncl_msleep(td, (caddr_t)&np->n_directio_asyncwr,
2712 &np->n_mtx, slpflag | (PRIBIO + 1),
2713 "nfsfsync", 0);
2714 if (error) {
2715 if (newnfs_sigintr(nmp, td)) {
2716 mtx_unlock(&np->n_mtx);
2717 error = EINTR;
2718 goto done;
2719 }
2720 }
2721 }
2722 mtx_unlock(&np->n_mtx);
2723 } else
2724 BO_UNLOCK(bo);
2725 mtx_lock(&np->n_mtx);
2726 if (np->n_flag & NWRITEERR) {
2727 error = np->n_error;
2728 np->n_flag &= ~NWRITEERR;
2729 }
2730 if (commit && bo->bo_dirty.bv_cnt == 0 &&
2731 bo->bo_numoutput == 0 && np->n_directio_asyncwr == 0)
2732 np->n_flag &= ~NMODIFIED;
2733 mtx_unlock(&np->n_mtx);
2734done:
2735 if (bvec != NULL && bvec != bvec_on_stack)
2736 free(bvec, M_TEMP);
2737 if (error == 0 && commit != 0 && waitfor == MNT_WAIT &&
2738 (bo->bo_dirty.bv_cnt != 0 || bo->bo_numoutput != 0 ||
2739 np->n_directio_asyncwr != 0) && trycnt++ < 5) {
2740 /* try, try again... */
2741 passone = 1;
2742 wcred = NULL;
2743 bvec = NULL;
2744 bvecsize = 0;
2745printf("try%d\n", trycnt);
2746 goto again;
2747 }
2748 return (error);
2749}
2750
2751/*
2752 * NFS advisory byte-level locks.
2753 */
2754static int
2755nfs_advlock(struct vop_advlock_args *ap)
2756{
2757 struct vnode *vp = ap->a_vp;
2758 struct ucred *cred;
2759 struct nfsnode *np = VTONFS(ap->a_vp);
2760 struct proc *p = (struct proc *)ap->a_id;
2761 struct thread *td = curthread; /* XXX */
2762 struct vattr va;
2763 int ret, error = EOPNOTSUPP;
2764 u_quad_t size;
2765
2766 if (NFS_ISV4(vp) && (ap->a_flags & F_POSIX)) {
2767 cred = p->p_ucred;
2768 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
2769 if (vp->v_iflag & VI_DOOMED) {
2770 VOP_UNLOCK(vp, 0);
2771 return (EBADF);
2772 }
2773
2774 /*
2775 * If this is unlocking a write locked region, flush and
2776 * commit them before unlocking. This is required by
2777 * RFC3530 Sec. 9.3.2.
2778 */
2779 if (ap->a_op == F_UNLCK &&
2780 nfscl_checkwritelocked(vp, ap->a_fl, cred, td))
2781 (void) ncl_flush(vp, MNT_WAIT, cred, td, 1);
2782
2783 /*
2784 * Loop around doing the lock op, while a blocking lock
2785 * must wait for the lock op to succeed.
2786 */
2787 do {
2788 ret = nfsrpc_advlock(vp, np->n_size, ap->a_op,
2789 ap->a_fl, 0, cred, td);
2790 if (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
2791 ap->a_op == F_SETLK) {
2792 VOP_UNLOCK(vp, 0);
2793 error = nfs_catnap(PZERO | PCATCH, "ncladvl");
2794 if (error)
2795 return (EINTR);
2796 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
2797 if (vp->v_iflag & VI_DOOMED) {
2798 VOP_UNLOCK(vp, 0);
2799 return (EBADF);
2800 }
2801 }
2802 } while (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
2803 ap->a_op == F_SETLK);
2804 if (ret == NFSERR_DENIED) {
2805 VOP_UNLOCK(vp, 0);
2806 return (EAGAIN);
2807 } else if (ret == EINVAL || ret == EBADF || ret == EINTR) {
2808 VOP_UNLOCK(vp, 0);
2809 return (ret);
2810 } else if (ret != 0) {
2811 VOP_UNLOCK(vp, 0);
2812 return (EACCES);
2813 }
2814
2815 /*
2816 * Now, if we just got a lock, invalidate data in the buffer
2817 * cache, as required, so that the coherency conforms with
2818 * RFC3530 Sec. 9.3.2.
2819 */
2820 if (ap->a_op == F_SETLK) {
2821 if ((np->n_flag & NMODIFIED) == 0) {
2822 np->n_attrstamp = 0;
2823 ret = VOP_GETATTR(vp, &va, cred);
2824 }
2825 if ((np->n_flag & NMODIFIED) || ret ||
2826 np->n_change != va.va_filerev) {
2827 (void) ncl_vinvalbuf(vp, V_SAVE, td, 1);
2828 np->n_attrstamp = 0;
2829 ret = VOP_GETATTR(vp, &va, cred);
2830 if (!ret) {
2831 np->n_mtime = va.va_mtime;
2832 np->n_change = va.va_filerev;
2833 }
2834 }
2835 }
2836 VOP_UNLOCK(vp, 0);
2837 return (0);
2838 } else if (!NFS_ISV4(vp)) {
2839 error = vn_lock(vp, LK_SHARED);
2840 if (error)
2841 return (error);
2842 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
2843 size = VTONFS(vp)->n_size;
2844 VOP_UNLOCK(vp, 0);
2845 error = lf_advlock(ap, &(vp->v_lockf), size);
2846 } else {
2847 if (ncl_advlock_p)
2848 error = ncl_advlock_p(ap);
2849 else
2850 error = ENOLCK;
2851 }
2852 }
2853 return (error);
2854}
2855
2856/*
2857 * NFS advisory byte-level locks.
2858 */
2859static int
2860nfs_advlockasync(struct vop_advlockasync_args *ap)
2861{
2862 struct vnode *vp = ap->a_vp;
2863 u_quad_t size;
2864 int error;
2865
2866 if (NFS_ISV4(vp))
2867 return (EOPNOTSUPP);
2868 error = vn_lock(vp, LK_SHARED);
2869 if (error)
2870 return (error);
2871 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
2872 size = VTONFS(vp)->n_size;
2873 VOP_UNLOCK(vp, 0);
2874 error = lf_advlockasync(ap, &(vp->v_lockf), size);
2875 } else {
2876 VOP_UNLOCK(vp, 0);
2877 error = EOPNOTSUPP;
2878 }
2879 return (error);
2880}
2881
2882/*
2883 * Print out the contents of an nfsnode.
2884 */
2885static int
2886nfs_print(struct vop_print_args *ap)
2887{
2888 struct vnode *vp = ap->a_vp;
2889 struct nfsnode *np = VTONFS(vp);
2890
2891 ncl_printf("\tfileid %ld fsid 0x%x",
2892 np->n_vattr.na_fileid, np->n_vattr.na_fsid);
2893 if (vp->v_type == VFIFO)
2894 fifo_printinfo(vp);
2895 printf("\n");
2896 return (0);
2897}
2898
2899/*
2900 * This is the "real" nfs::bwrite(struct buf*).
2901 * We set B_CACHE if this is a VMIO buffer.
2902 */
2903int
2904ncl_writebp(struct buf *bp, int force __unused, struct thread *td)
2905{
2906 int s;
2907 int oldflags = bp->b_flags;
2908#if 0
2909 int retv = 1;
2910 off_t off;
2911#endif
2912
2913 BUF_ASSERT_HELD(bp);
2914
2915 if (bp->b_flags & B_INVAL) {
2916 brelse(bp);
2917 return(0);
2918 }
2919
2920 bp->b_flags |= B_CACHE;
2921
2922 /*
2923 * Undirty the bp. We will redirty it later if the I/O fails.
2924 */
2925
2926 s = splbio();
2927 bundirty(bp);
2928 bp->b_flags &= ~B_DONE;
2929 bp->b_ioflags &= ~BIO_ERROR;
2930 bp->b_iocmd = BIO_WRITE;
2931
2932 bufobj_wref(bp->b_bufobj);
2933 curthread->td_ru.ru_oublock++;
2934 splx(s);
2935
2936 /*
2937 * Note: to avoid loopback deadlocks, we do not
2938 * assign b_runningbufspace.
2939 */
2940 vfs_busy_pages(bp, 1);
2941
2942 BUF_KERNPROC(bp);
2943 bp->b_iooffset = dbtob(bp->b_blkno);
2944 bstrategy(bp);
2945
2946 if( (oldflags & B_ASYNC) == 0) {
2947 int rtval = bufwait(bp);
2948
2949 if (oldflags & B_DELWRI) {
2950 s = splbio();
2951 reassignbuf(bp);
2952 splx(s);
2953 }
2954 brelse(bp);
2955 return (rtval);
2956 }
2957
2958 return (0);
2959}
2960
2961/*
2962 * nfs special file access vnode op.
2963 * Essentially just get vattr and then imitate iaccess() since the device is
2964 * local to the client.
2965 */
2966static int
2967nfsspec_access(struct vop_access_args *ap)
2968{
2969 struct vattr *vap;
2970 struct ucred *cred = ap->a_cred;
2971 struct vnode *vp = ap->a_vp;
2972 accmode_t accmode = ap->a_accmode;
2973 struct vattr vattr;
2974 int error;
2975
2976 /*
2977 * Disallow write attempts on filesystems mounted read-only;
2978 * unless the file is a socket, fifo, or a block or character
2979 * device resident on the filesystem.
2980 */
2981 if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
2982 switch (vp->v_type) {
2983 case VREG:
2984 case VDIR:
2985 case VLNK:
2986 return (EROFS);
2987 default:
2988 break;
2989 }
2990 }
2991 vap = &vattr;
2992 error = VOP_GETATTR(vp, vap, cred);
2993 if (error)
2994 goto out;
2995 error = vaccess(vp->v_type, vap->va_mode, vap->va_uid, vap->va_gid,
2996 accmode, cred, NULL);
2997out:
2998 return error;
2999}
3000
3001/*
3002 * Read wrapper for fifos.
3003 */
3004static int
3005nfsfifo_read(struct vop_read_args *ap)
3006{
3007 struct nfsnode *np = VTONFS(ap->a_vp);
3008 int error;
3009
3010 /*
3011 * Set access flag.
3012 */
3013 mtx_lock(&np->n_mtx);
3014 np->n_flag |= NACC;
3015 getnanotime(&np->n_atim);
3016 mtx_unlock(&np->n_mtx);
3017 error = fifo_specops.vop_read(ap);
3018 return error;
3019}
3020
3021/*
3022 * Write wrapper for fifos.
3023 */
3024static int
3025nfsfifo_write(struct vop_write_args *ap)
3026{
3027 struct nfsnode *np = VTONFS(ap->a_vp);
3028
3029 /*
3030 * Set update flag.
3031 */
3032 mtx_lock(&np->n_mtx);
3033 np->n_flag |= NUPD;
3034 getnanotime(&np->n_mtim);
3035 mtx_unlock(&np->n_mtx);
3036 return(fifo_specops.vop_write(ap));
3037}
3038
3039/*
3040 * Close wrapper for fifos.
3041 *
3042 * Update the times on the nfsnode then do fifo close.
3043 */
3044static int
3045nfsfifo_close(struct vop_close_args *ap)
3046{
3047 struct vnode *vp = ap->a_vp;
3048 struct nfsnode *np = VTONFS(vp);
3049 struct vattr vattr;
3050 struct timespec ts;
3051
3052 mtx_lock(&np->n_mtx);
3053 if (np->n_flag & (NACC | NUPD)) {
3054 getnanotime(&ts);
3055 if (np->n_flag & NACC)
3056 np->n_atim = ts;
3057 if (np->n_flag & NUPD)
3058 np->n_mtim = ts;
3059 np->n_flag |= NCHG;
3060 if (vrefcnt(vp) == 1 &&
3061 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3062 VATTR_NULL(&vattr);
3063 if (np->n_flag & NACC)
3064 vattr.va_atime = np->n_atim;
3065 if (np->n_flag & NUPD)
3066 vattr.va_mtime = np->n_mtim;
3067 mtx_unlock(&np->n_mtx);
3068 (void)VOP_SETATTR(vp, &vattr, ap->a_cred);
3069 goto out;
3070 }
3071 }
3072 mtx_unlock(&np->n_mtx);
3073out:
3074 return (fifo_specops.vop_close(ap));
3075}
3076
3077/*
3078 * Just call ncl_writebp() with the force argument set to 1.
3079 *
3080 * NOTE: B_DONE may or may not be set in a_bp on call.
3081 */
3082static int
3083nfs_bwrite(struct buf *bp)
3084{
3085
3086 return (ncl_writebp(bp, 1, curthread));
3087}
3088
3089struct buf_ops buf_ops_newnfs = {
3090 .bop_name = "buf_ops_nfs",
3091 .bop_write = nfs_bwrite,
3092 .bop_strategy = bufstrategy,
3093 .bop_sync = bufsync,
3094 .bop_bdflush = bufbdflush,
3095};
3096
3097/*
3098 * Cloned from vop_stdlock(), and then the ugly hack added.
3099 */
3100static int
3101nfs_lock1(struct vop_lock1_args *ap)
3102{
3103 struct vnode *vp = ap->a_vp;
3104 int error = 0;
3105
3106 /*
3107 * Since vfs_hash_get() calls vget() and it will no longer work
3108 * for FreeBSD8 with flags == 0, I can only think of this horrible
3109 * hack to work around it. I call vfs_hash_get() with LK_EXCLOTHER
3110 * and then handle it here. All I want for this case is a v_usecount
3111 * on the vnode to use for recovery, while another thread might
3112 * hold a lock on the vnode. I have the other threads blocked, so
3113 * there isn't any race problem.
3114 */
3115 if ((ap->a_flags & LK_TYPE_MASK) == LK_EXCLOTHER) {
3116 if ((ap->a_flags & LK_INTERLOCK) == 0)
3117 panic("ncllock1");
3118 if ((vp->v_iflag & VI_DOOMED))
3119 error = ENOENT;
3120 VI_UNLOCK(vp);
3121 return (error);
3122 }
3123 return (_lockmgr_args(vp->v_vnlock, ap->a_flags, VI_MTX(vp),
3124 LK_WMESG_DEFAULT, LK_PRIO_DEFAULT, LK_TIMO_DEFAULT, ap->a_file,
3125 ap->a_line));
3126}
3127
3128#ifdef NFS4_ACL_EXTATTR_NAME
3129static int
3130nfs_getacl(struct vop_getacl_args *ap)
3131{
3132 int error;
3133
3134 if (ap->a_type != ACL_TYPE_NFS4)
3135 return (EOPNOTSUPP);
3136 error = nfsrpc_getacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3137 NULL);
3138 if (error > NFSERR_STALE) {
3139 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3140 error = EPERM;
3141 }
3142 return (error);
3143}
3144
3145static int
3146nfs_setacl(struct vop_setacl_args *ap)
3147{
3148 int error;
3149
3150 if (ap->a_type != ACL_TYPE_NFS4)
3151 return (EOPNOTSUPP);
3152 error = nfsrpc_setacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3153 NULL);
3154 if (error > NFSERR_STALE) {
3155 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3156 error = EPERM;
3157 }
3158 return (error);
3159}
3160
3161#endif /* NFS4_ACL_EXTATTR_NAME */
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