2 /* $Id: nfs_vnops.c,v 1.45 2003/11/05 14:59:02 rees Exp $ */
6 * the regents of the university of michigan
9 * permission is granted to use, copy, create derivative works and redistribute
10 * this software and such derivative works for any purpose, so long as the name
11 * of the university of michigan is not used in any advertising or publicity
12 * pertaining to the use or distribution of this software without specific,
13 * written prior authorization. if the above copyright notice or any other
14 * identification of the university of michigan is included in any copy of any
15 * portion of this software, then the disclaimer below must also be included.
17 * this software is provided as is, without representation from the university
18 * of michigan as to its fitness for any purpose, and without warranty by the
19 * university of michigan of any kind, either express or implied, including
20 * without limitation the implied warranties of merchantability and fitness for
21 * a particular purpose. the regents of the university of michigan shall not be
22 * liable for any damages, including special, indirect, incidental, or
23 * consequential damages, with respect to any claim arising out of or in
24 * connection with the use of the software, even if it has been or is hereafter
25 * advised of the possibility of such damages.
29 * Copyright (c) 1989, 1993
30 * The Regents of the University of California. All rights reserved.
32 * This code is derived from software contributed to Berkeley by
33 * Rick Macklem at The University of Guelph.
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
38 * 1. Redistributions of source code must retain the above copyright
39 * notice, this list of conditions and the following disclaimer.
40 * 2. Redistributions in binary form must reproduce the above copyright
41 * notice, this list of conditions and the following disclaimer in the
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43 * 4. Neither the name of the University nor the names of its contributors
44 * may be used to endorse or promote products derived from this software
45 * without specific prior written permission.
47 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
50 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
53 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
56 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59 * @(#)nfs_vnops.c 8.16 (Berkeley) 5/27/95
62 #include <sys/cdefs.h>
63 __FBSDID("$FreeBSD$");
66 * vnode op calls for Sun NFS version 2 and 3
71 #include <sys/param.h>
72 #include <sys/kernel.h>
73 #include <sys/systm.h>
74 #include <sys/resourcevar.h>
76 #include <sys/mount.h>
79 #include <sys/malloc.h>
81 #include <sys/namei.h>
82 #include <sys/socket.h>
83 #include <sys/vnode.h>
84 #include <sys/dirent.h>
85 #include <sys/fcntl.h>
86 #include <sys/lockf.h>
88 #include <sys/sysctl.h>
89 #include <sys/lockmgr.h>
90 #include <sys/signalvar.h>
93 #include <vm/vm_extern.h>
95 #include <fs/fifofs/fifo.h>
97 #include <rpc/rpcclnt.h>
99 #include <nfs/rpcv2.h>
100 #include <nfs/nfsproto.h>
101 #include <nfsclient/nfs.h>
102 #include <nfs4client/nfs4.h>
103 #include <nfsclient/nfsnode.h>
104 #include <nfsclient/nfsmount.h>
105 #include <nfsclient/nfs_lock.h>
106 #include <nfs/xdr_subs.h>
107 #include <nfsclient/nfsm_subs.h>
110 #include <netinet/in.h>
111 #include <netinet/in_var.h>
114 #include <nfs4client/nfs4m_subs.h>
115 #include <nfs4client/nfs4_vn.h>
122 * Ifdef for FreeBSD-current merged buffer cache. It is unfortunate that these
123 * calls are not in getblk() and brelse() so that they would not be necessary
127 #define vfs_busy_pages(bp, f)
130 static int nfs4_flush(struct vnode *, int, struct thread *,
132 static int nfs4_setattrrpc(struct vnode *, struct vattr *, struct ucred *,
134 static int nfs4_closerpc(struct vnode *, struct ucred *, struct thread *, int);
136 static vop_lookup_t nfs4_lookup;
137 static vop_create_t nfs4_create;
138 static vop_mknod_t nfs4_mknod;
139 static vop_open_t nfs4_open;
140 static vop_close_t nfs4_close;
141 static vop_access_t nfs4_access;
142 static vop_getattr_t nfs4_getattr;
143 static vop_setattr_t nfs4_setattr;
144 static vop_read_t nfs4_read;
145 static vop_fsync_t nfs4_fsync;
146 static vop_remove_t nfs4_remove;
147 static vop_link_t nfs4_link;
148 static vop_rename_t nfs4_rename;
149 static vop_mkdir_t nfs4_mkdir;
150 static vop_rmdir_t nfs4_rmdir;
151 static vop_symlink_t nfs4_symlink;
152 static vop_readdir_t nfs4_readdir;
153 static vop_strategy_t nfs4_strategy;
154 static int nfs4_lookitup(struct vnode *, const char *, int,
155 struct ucred *, struct thread *, struct nfsnode **);
156 static int nfs4_sillyrename(struct vnode *, struct vnode *,
157 struct componentname *);
158 static vop_readlink_t nfs4_readlink;
159 static vop_print_t nfs4_print;
160 static vop_advlock_t nfs4_advlock;
163 * Global vfs data structures for nfs
165 struct vop_vector nfs4_vnodeops = {
166 .vop_default = &default_vnodeops,
167 .vop_access = nfs4_access,
168 .vop_advlock = nfs4_advlock,
169 .vop_close = nfs4_close,
170 .vop_create = nfs4_create,
171 .vop_fsync = nfs4_fsync,
172 .vop_getattr = nfs4_getattr,
173 .vop_getpages = nfs_getpages,
174 .vop_putpages = nfs_putpages,
175 .vop_inactive = nfs_inactive,
176 .vop_lease = VOP_NULL,
177 .vop_link = nfs4_link,
178 .vop_lookup = nfs4_lookup,
179 .vop_mkdir = nfs4_mkdir,
180 .vop_mknod = nfs4_mknod,
181 .vop_open = nfs4_open,
182 .vop_print = nfs4_print,
183 .vop_read = nfs4_read,
184 .vop_readdir = nfs4_readdir,
185 .vop_readlink = nfs4_readlink,
186 .vop_reclaim = nfs_reclaim,
187 .vop_remove = nfs4_remove,
188 .vop_rename = nfs4_rename,
189 .vop_rmdir = nfs4_rmdir,
190 .vop_setattr = nfs4_setattr,
191 .vop_strategy = nfs4_strategy,
192 .vop_symlink = nfs4_symlink,
193 .vop_write = nfs_write,
196 static int nfs4_removerpc(struct vnode *dvp, const char *name, int namelen,
197 struct ucred *cred, struct thread *td);
198 static int nfs4_renamerpc(struct vnode *fdvp, const char *fnameptr,
199 int fnamelen, struct vnode *tdvp,
200 const char *tnameptr, int tnamelen,
201 struct ucred *cred, struct thread *td);
202 static int nfs4_renameit(struct vnode *sdvp, struct componentname *scnp,
203 struct sillyrename *sp);
204 static int nfs4_openrpc(struct vnode *, struct vnode **,
205 struct componentname *, int, struct vattr *);
206 static int nfs4_open_confirm(struct vnode *vp, struct nfs4_compound *cpp,
207 struct nfs4_oparg_open *openap,
208 struct nfs4_oparg_getfh *gfh,
209 struct ucred *cred, struct thread *td);
210 static int nfs4_createrpc(struct vnode *, struct vnode **,
211 struct componentname *, nfstype,
212 struct vattr *, char *);
217 struct nfs4_lowner nfs4_masterlowner;
219 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1))
221 SYSCTL_DECL(_vfs_nfs4);
223 static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO;
224 SYSCTL_INT(_vfs_nfs4, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
225 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
227 static int nfsv3_commit_on_close = 0;
228 SYSCTL_INT(_vfs_nfs4, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW,
229 &nfsv3_commit_on_close, 0, "write+commit on close, else only write");
231 SYSCTL_INT(_vfs_nfs4, OID_AUTO, access_cache_hits, CTLFLAG_RD,
232 &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
234 SYSCTL_INT(_vfs_nfs4, OID_AUTO, access_cache_misses, CTLFLAG_RD,
235 &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
238 #define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \
239 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \
240 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP)
242 nfs3_access_otw(struct vnode *vp, int wmode, struct thread *td,
247 int error = 0, attrflag;
251 struct mbuf *mreq, *mrep = NULL, *md, *mb;
254 struct nfsnode *np = VTONFS(vp);
256 nfsstats.rpccnt[NFSPROC_ACCESS]++;
257 mreq = nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED);
259 bpos = mtod(mb, caddr_t);
261 tl = nfsm_build(u_int32_t *, NFSX_UNSIGNED);
262 *tl = txdr_unsigned(wmode);
263 nfsm_request(vp, NFSPROC_ACCESS, td, cred);
264 nfsm_postop_attr(vp, attrflag);
266 tl = nfsm_dissect(u_int32_t *, NFSX_UNSIGNED);
267 rmode = fxdr_unsigned(u_int32_t, *tl);
269 np->n_modeuid = cred->cr_uid;
270 np->n_modestamp = time_second;
278 * nfs access vnode op.
279 * For nfs version 2, just return ok. File accesses may fail later.
280 * For nfs version 3, use the access rpc to check accessibility. If file modes
281 * are changed on the server, accesses might still fail later.
284 nfs4_access(struct vop_access_args *ap)
286 struct vnode *vp = ap->a_vp;
288 u_int32_t mode, wmode;
289 int v3 = NFS_ISV3(vp); /* v3 \in v4 */
290 struct nfsnode *np = VTONFS(vp);
292 struct mbuf *mreq, *mrep = NULL, *md, *mb;
293 struct nfs4_compound cp;
294 struct nfs4_oparg_access acc;
295 struct thread *td = ap->a_td;
296 struct ucred *cred = ap->a_cred;
299 * Disallow write attempts on filesystems mounted read-only;
300 * unless the file is a socket, fifo, or a block or character
301 * device resident on the filesystem.
303 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
304 switch (vp->v_type) {
314 * For nfs v3, check to see if we have done this recently, and if
315 * so return our cached result instead of making an ACCESS call.
316 * If not, do an access rpc, otherwise you are stuck emulating
317 * ufs_access() locally using the vattr. This may not be correct,
318 * since the server may apply other access criteria such as
319 * client uid-->server uid mapping that we do not know about.
321 /* XXX Disable this for now; needs fixing of _access_otw() */
323 if (ap->a_mode & VREAD)
324 mode = NFSV3ACCESS_READ;
327 if (vp->v_type != VDIR) {
328 if (ap->a_mode & VWRITE)
329 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
330 if (ap->a_mode & VEXEC)
331 mode |= NFSV3ACCESS_EXECUTE;
333 if (ap->a_mode & VWRITE)
334 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
336 if (ap->a_mode & VEXEC)
337 mode |= NFSV3ACCESS_LOOKUP;
339 /* XXX safety belt, only make blanket request if caching */
340 if (nfsaccess_cache_timeout > 0) {
341 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY |
342 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE |
343 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP;
349 * Does our cached result allow us to give a definite yes to
352 if ((time_second < (np->n_modestamp + nfsaccess_cache_timeout)) &&
353 (ap->a_cred->cr_uid == np->n_modeuid) &&
354 ((np->n_mode & mode) == mode)) {
355 nfsstats.accesscache_hits++;
358 * Either a no, or a don't know. Go to the wire.
360 nfsstats.accesscache_misses++;
361 error = nfs3_access_otw(vp, wmode, ap->a_td,ap->a_cred);
363 if ((np->n_mode & mode) != mode) {
371 /* XXX use generic access code here? */
372 mode = ap->a_mode & VREAD ? NFSV4ACCESS_READ : 0;
373 if (vp->v_type == VDIR) {
374 if (ap->a_mode & VWRITE)
375 mode |= NFSV4ACCESS_MODIFY | NFSV4ACCESS_EXTEND | NFSV4ACCESS_DELETE;
376 if (ap->a_mode & VEXEC)
377 mode |= NFSV4ACCESS_LOOKUP;
379 if (ap->a_mode & VWRITE)
380 mode |= NFSV4ACCESS_MODIFY | NFSV4ACCESS_EXTEND;
381 if (ap->a_mode & VEXEC)
382 mode |= NFSV4ACCESS_EXECUTE;
385 nfs_v4initcompound(&cp);
388 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0);
390 bpos = mtod(mb, caddr_t);
392 nfsm_v4build_compound(&cp, "nfs4_access()");
393 nfsm_v4build_putfh(&cp, vp);
394 nfsm_v4build_access(&cp, &acc);
395 nfsm_v4build_finalize(&cp);
397 nfsm_request(vp, NFSV4PROC_COMPOUND, td, cred);
401 nfsm_v4dissect_compound(&cp);
402 nfsm_v4dissect_putfh(&cp);
403 nfsm_v4dissect_access(&cp, &acc);
405 if ((acc.rmode & mode) != mode)
409 error = nfs_v4postop(&cp, error);
418 nfs4_openrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
419 int flags, struct vattr *vap)
421 struct vnode *vp = *vpp;
422 struct nfs4_oparg_getattr getattr;
423 struct nfs4_oparg_getfh getfh;
424 struct nfs4_oparg_open opena;
425 struct nfs4_compound cp;
428 struct mbuf *mreq, *mrep = NULL, *md, *mb;
429 struct ucred *cred = cnp->cn_cred;
430 struct thread *td = cnp->cn_thread;
431 struct nfs4_fctx xfc, *fcp;
435 /* Create a new file */
438 bzero(fcp, sizeof(*fcp));
441 fcp = flags & FWRITE ? &np->n_wfc : &np->n_rfc;
445 * Since we are currently only one lockowner; we only open the
446 * file once each for reading and writing.
448 if (fcp->refcnt++ != 0) {
450 /*printf("not opening %s\n", np->n_name != NULL ? np->n_name : "");*/
454 fcp->lop = &nfs4_masterlowner;
457 nfs_v4initcompound(&cp);
458 cp.nmp = VFSTONFS(dvp->v_mount);
460 opena.ctype = NCLNULL;
463 opena.fcp = fcp; /* For lockowner */
466 getattr.bm = &nfsv4_getattrbm;
468 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0);
470 bpos = mtod(mb, caddr_t);
472 nfsm_v4build_compound(&cp, "nfs4_openrpc()");
473 nfsm_v4build_putfh(&cp, dvp);
474 nfsm_v4build_open(&cp, &opena);
475 nfsm_v4build_getattr(&cp, &getattr);
476 nfsm_v4build_getfh(&cp, &getfh);
477 nfsm_v4build_finalize(&cp);
479 nfsm_request(vp != NULL ? vp : dvp, NFSV4PROC_COMPOUND, td, cred);
483 nfsm_v4dissect_compound(&cp);
484 nfsm_v4dissect_putfh(&cp);
485 nfsm_v4dissect_open(&cp, &opena);
486 nfsm_v4dissect_getattr(&cp, &getattr);
487 nfsm_v4dissect_getfh(&cp, &getfh);
489 error = nfs_v4postop(&cp, error);
491 if (opena.rflags & NFSV4OPENRES_CONFIRM) {
492 error = nfs4_open_confirm(vp ? vp : dvp, &cp, &opena, &getfh, cred, td);
499 error = nfs_nget(dvp->v_mount, &getfh.fh_val,
506 np->n_namelen = cnp->cn_namelen; /* XXX memory leaks on these; track! */
507 if (np->n_name != NULL)
508 FREE(np->n_name, M_NFSREQ);
509 MALLOC(np->n_name, u_char *, np->n_namelen + 1, M_NFSREQ, M_WAITOK);
510 bcopy(cnp->cn_nameptr, np->n_name, np->n_namelen);
511 np->n_name[np->n_namelen] = '\0';
517 /*printf("opened new file %s\n", np->n_name);*/
519 nfs4_vnop_loadattrcache(vp, &getattr.fa, NULL);
522 /*printf("openend \"old\" %s\n", np->n_name != NULL ? np->n_name : "");*/
524 if (flags & O_TRUNC && np->n_size != 0) {
529 error = nfs4_setattrrpc(vp, &va,
530 cnp->cn_cred, cnp->cn_thread);
543 nfs4_open_confirm(struct vnode *vp, struct nfs4_compound *cpp,
544 struct nfs4_oparg_open *openap, struct nfs4_oparg_getfh *gfh,
545 struct ucred *cred, struct thread *td)
549 struct mbuf *mreq, *mrep = NULL, *md, *mb;
551 nfs_v4initcompound(cpp);
552 cpp->nmp = VFSTONFS(vp->v_mount);
554 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0);
556 bpos = mtod(mb, caddr_t);
558 nfsm_v4build_compound(cpp, "nfs4_open_confirm()");
559 nfsm_v4build_putfh_nv(cpp, gfh);
560 nfsm_v4build_open_confirm(cpp, openap);
561 nfsm_v4build_finalize(cpp);
563 nfsm_request(vp, NFSV4PROC_COMPOUND, td, cred);
567 nfsm_v4dissect_compound(cpp);
568 nfsm_v4dissect_putfh(cpp);
569 nfsm_v4dissect_open_confirm(cpp, openap);
572 error = nfs_v4postop(cpp, error);
583 * Check to see if the type is ok
584 * and that deletion is not in progress.
585 * For paged in text files, you will need to flush the page cache
586 * if consistency is lost.
590 nfs4_open(struct vop_open_args *ap)
592 struct vnode *vp = ap->a_vp;
593 struct nfsnode *np = VTONFS(vp);
594 enum vtype vtype = vp->v_type;
595 int mode = ap->a_mode;
596 struct componentname cn;
599 if (vtype != VDIR && vtype != VLNK) {
601 printf("open eacces vtyp=%d\n", vp->v_type);
608 if (np->n_flag & NCREATED) {
609 np->n_flag &= ~NCREATED;
613 cn.cn_nameptr = np->n_name;
614 cn.cn_namelen = np->n_namelen;
615 cn.cn_cred = ap->a_cred;
616 cn.cn_thread = ap->a_td;
618 return (nfs4_openrpc(np->n_dvp, &vp, &cn, mode, NULL));
622 nfs4_closerpc(struct vnode *vp, struct ucred *cred, struct thread *td, int flags)
626 struct mbuf *mreq, *mrep = NULL, *md, *mb;
627 struct nfs4_fctx *fcp;
628 struct nfs4_compound cp;
629 struct nfsnode *np = VTONFS(vp);
631 fcp = flags & FWRITE ? &np->n_wfc : &np->n_rfc;
633 nfs_v4initcompound(&cp);
635 if (--fcp->refcnt != 0)
638 /*printf("closing %s\n", np->n_name != NULL ? np->n_name : "");*/
642 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0);
644 bpos = mtod(mb, caddr_t);
646 nfsm_v4build_compound(&cp, "nfs4_closerpc()");
647 nfsm_v4build_putfh(&cp, vp);
648 nfsm_v4build_close(&cp, fcp);
649 nfsm_v4build_finalize(&cp);
651 nfsm_request(vp, NFSV4PROC_COMPOUND, td, cred);
655 nfsm_v4dissect_compound(&cp);
656 nfsm_v4dissect_putfh(&cp);
657 nfsm_v4dissect_close(&cp, fcp);
660 error = nfs_v4postop(&cp, error);
670 * play it safe for now (see comments in v2/v3 nfs_close regarding dirty buffers)
674 nfs4_close(struct vop_close_args *ap)
676 struct vnode *vp = ap->a_vp;
677 struct nfsnode *np = VTONFS(vp);
680 if (vp->v_type != VREG)
683 if (np->n_flag & NMODIFIED) {
684 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
688 error = nfs4_closerpc(vp, ap->a_cred, ap->a_td, ap->a_fflag);
690 if (!error && np->n_flag & NWRITEERR) {
691 np->n_flag &= ~NWRITEERR;
698 * nfs getattr call from vfs.
701 nfs4_getattr(struct vop_getattr_args *ap)
703 struct vnode *vp = ap->a_vp;
704 struct nfsnode *np = VTONFS(vp);
707 struct mbuf *mreq, *mrep = NULL, *md, *mb;
708 struct nfs4_oparg_getattr ga;
709 struct nfs4_compound cp;
712 * Update local times for special files.
714 if (np->n_flag & (NACC | NUPD))
717 * First look in the cache.
719 if (nfs_getattrcache(vp, ap->a_vap) == 0)
722 nfsstats.rpccnt[NFSPROC_GETATTR]++;
724 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, NFSX_FH(1));
726 bpos = mtod(mb, caddr_t);
728 ga.bm = &nfsv4_getattrbm;
729 nfs_v4initcompound(&cp);
731 nfsm_v4build_compound(&cp, "nfs4_getattr()");
732 nfsm_v4build_putfh(&cp, vp);
733 nfsm_v4build_getattr(&cp, &ga);
734 nfsm_v4build_finalize(&cp);
736 nfsm_request(vp, NFSV4PROC_COMPOUND, ap->a_td, ap->a_cred);
740 nfsm_v4dissect_compound(&cp);
741 nfsm_v4dissect_putfh(&cp);
742 nfsm_v4dissect_getattr(&cp, &ga);
744 nfs4_vnop_loadattrcache(vp, &ga.fa, ap->a_vap);
747 error = nfs_v4postop(&cp, error);
758 nfs4_setattr(struct vop_setattr_args *ap)
760 struct vnode *vp = ap->a_vp;
761 struct nfsnode *np = VTONFS(vp);
762 struct vattr *vap = ap->a_vap;
771 * Setting of flags is not supported.
773 if (vap->va_flags != VNOVAL)
777 * Disallow write attempts if the filesystem is mounted read-only.
779 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
780 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
781 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
782 (vp->v_mount->mnt_flag & MNT_RDONLY))
784 if (vap->va_size != VNOVAL) {
785 switch (vp->v_type) {
792 if (vap->va_mtime.tv_sec == VNOVAL &&
793 vap->va_atime.tv_sec == VNOVAL &&
794 vap->va_mode == (mode_t)VNOVAL &&
795 vap->va_uid == (uid_t)VNOVAL &&
796 vap->va_gid == (gid_t)VNOVAL)
798 vap->va_size = VNOVAL;
802 * Disallow write attempts if the filesystem is
805 if (vp->v_mount->mnt_flag & MNT_RDONLY)
809 * We run vnode_pager_setsize() early (why?),
810 * we must set np->n_size now to avoid vinvalbuf
811 * V_SAVE races that might setsize a lower
816 error = nfs_meta_setsize(vp, ap->a_cred,
817 ap->a_td, vap->va_size);
819 if (np->n_flag & NMODIFIED) {
820 if (vap->va_size == 0)
821 error = nfs_vinvalbuf(vp, 0, ap->a_td, 1);
823 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
825 vnode_pager_setsize(vp, np->n_size);
830 * np->n_size has already been set to vap->va_size
831 * in nfs_meta_setsize(). We must set it again since
832 * nfs_loadattrcache() could be called through
833 * nfs_meta_setsize() and could modify np->n_size.
835 np->n_vattr.va_size = np->n_size = vap->va_size;
837 } else if ((vap->va_mtime.tv_sec != VNOVAL ||
838 vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NMODIFIED) &&
839 vp->v_type == VREG &&
840 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1)) == EINTR)
843 if (vap->va_size != VNOVAL && np->n_wfc.refcnt == 0) {
844 /* Have to open the file before we can truncate it */
845 struct componentname cn;
847 cn.cn_nameptr = np->n_name;
848 cn.cn_namelen = np->n_namelen;
849 cn.cn_cred = ap->a_cred;
850 cn.cn_thread = ap->a_td;
851 error = nfs4_openrpc(np->n_dvp, &vp, &cn, FWRITE, NULL);
854 np->n_flag |= NTRUNCATE;
857 error = nfs4_setattrrpc(vp, vap, ap->a_cred, ap->a_td);
858 if (error && vap->va_size != VNOVAL) {
859 np->n_size = np->n_vattr.va_size = tsize;
860 vnode_pager_setsize(vp, np->n_size);
866 * Do an nfs setattr rpc.
869 nfs4_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred,
874 struct mbuf *mreq, *mrep = NULL, *md, *mb;
875 struct nfs4_compound cp;
876 struct nfs4_oparg_getattr ga;
877 struct nfsnode *np = VTONFS(vp);
878 struct nfs4_fctx *fcp;
880 nfsstats.rpccnt[NFSPROC_SETATTR]++;
881 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0);
883 bpos = mtod(mb, caddr_t);
885 ga.bm = &nfsv4_getattrbm;
886 fcp = (vap->va_size != VNOVAL) ? &np->n_wfc : NULL;
887 nfs_v4initcompound(&cp);
889 nfsm_v4build_compound(&cp, "nfs4_setattrrpc");
890 nfsm_v4build_putfh(&cp, vp);
891 nfsm_v4build_setattr(&cp, vap, fcp);
892 nfsm_v4build_getattr(&cp, &ga);
893 nfsm_v4build_finalize(&cp);
895 nfsm_request(vp, NFSV4PROC_COMPOUND, td, cred);
899 nfsm_v4dissect_compound(&cp);
900 nfsm_v4dissect_putfh(&cp);
901 nfsm_v4dissect_setattr(&cp);
902 nfsm_v4dissect_getattr(&cp, &ga);
904 nfs4_vnop_loadattrcache(vp, &ga.fa, NULL);
906 /* TODO: do the settatr and close in a single compound rpc */
907 if (np->n_flag & NTRUNCATE) {
908 error = nfs4_closerpc(vp, cred, td, FWRITE);
909 np->n_flag &= ~NTRUNCATE;
913 error = nfs_v4postop(&cp, error);
922 * nfs lookup call, one step at a time...
923 * First look in cache
924 * If not found, unlock the directory nfsnode and do the rpc
927 nfs4_lookup(struct vop_lookup_args *ap)
929 struct componentname *cnp = ap->a_cnp;
930 struct vnode *dvp = ap->a_dvp;
931 struct vnode **vpp = ap->a_vpp;
932 int isdot, flags = cnp->cn_flags;
934 struct nfsmount *nmp;
936 struct mbuf *mreq, *mrep = NULL, *md, *mb;
940 int error = 0, fhsize;
941 struct thread *td = cnp->cn_thread;
942 struct nfs4_compound cp;
943 struct nfs4_oparg_getattr ga, dga;
944 struct nfs4_oparg_lookup l;
945 struct nfs4_oparg_getfh gfh;
948 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) &&
949 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
951 if (dvp->v_type != VDIR)
953 nmp = VFSTONFS(dvp->v_mount);
956 isdot = cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.';
958 if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0) {
962 if ((error = cache_lookup(dvp, vpp, cnp)) && error != ENOENT) {
966 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, td)
967 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) {
968 nfsstats.lookupcache_hits++;
969 if (cnp->cn_nameiop != LOOKUP &&
971 cnp->cn_flags |= SAVENAME;
983 nfsstats.lookupcache_misses++;
984 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
986 len = cnp->cn_namelen;
987 mreq = nfsm_reqhead(NULL, NFSV4PROC_COMPOUND, 0);
989 bpos = mtod(mb, caddr_t);
991 ga.bm = &nfsv4_getattrbm;
992 dga.bm = &nfsv4_getattrbm;
993 nfs_v4initcompound(&cp);
995 nfsm_v4build_compound(&cp, "nfs4_lookup()");
996 nfsm_v4build_putfh(&cp, dvp);
997 nfsm_v4build_getattr(&cp, &dga);
998 if (flags & ISDOTDOT)
999 nfsm_v4build_lookupp(&cp);
1001 l.name = cnp->cn_nameptr;
1003 nfsm_v4build_lookup(&cp, &l);
1005 nfsm_v4build_getattr(&cp, &ga);
1006 nfsm_v4build_getfh(&cp, &gfh);
1007 nfsm_v4build_finalize(&cp);
1009 nfsm_request(dvp, NFSV4PROC_COMPOUND, cnp->cn_thread, cnp->cn_cred);
1013 nfsm_v4dissect_compound(&cp);
1014 nfsm_v4dissect_putfh(&cp);
1015 nfsm_v4dissect_getattr(&cp, &dga);
1016 if (flags & ISDOTDOT)
1017 nfsm_v4dissect_lookupp(&cp);
1019 nfsm_v4dissect_lookup(&cp);
1020 nfsm_v4dissect_getattr(&cp, &ga);
1021 nfsm_v4dissect_getfh(&cp, &gfh);
1023 nfs4_vnop_loadattrcache(dvp, &dga.fa, NULL);
1025 fhsize = gfh.fh_len;
1028 * Handle RENAME case...
1030 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) {
1031 if (NFS_CMPFH(np, fhp, fhsize))
1034 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1040 nfs4_vnop_loadattrcache(newvp, &ga.fa, NULL);
1043 cnp->cn_flags |= SAVENAME;
1047 if (flags & ISDOTDOT) {
1048 VOP_UNLOCK(dvp, 0, td);
1050 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1051 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td);
1056 nfs4_vnop_loadattrcache(newvp, &ga.fa, NULL);
1057 } else if (NFS_CMPFH(np, fhp, fhsize)) {
1061 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1066 /* Fill in np used by open. */
1068 np->n_namelen = cnp->cn_namelen;
1069 if (np->n_name != NULL)
1070 FREE(np->n_name, M_NFSREQ);
1071 MALLOC(np->n_name, u_char *, np->n_namelen + 1, M_NFSREQ, M_WAITOK);
1072 bcopy(cnp->cn_nameptr, np->n_name, np->n_namelen);
1073 np->n_name[np->n_namelen] = '\0';
1075 nfs4_vnop_loadattrcache(newvp, &ga.fa, NULL);
1078 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
1079 cnp->cn_flags |= SAVENAME;
1080 if ((cnp->cn_flags & MAKEENTRY) &&
1081 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) {
1082 np->n_ctime = np->n_vattr.va_ctime.tv_sec;
1083 cache_enter(dvp, newvp, cnp);
1088 error = nfs_v4postop(&cp, error);
1091 if (newvp != NULLVP) {
1095 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) &&
1096 (flags & ISLASTCN) && error == ENOENT) {
1097 if (dvp->v_mount->mnt_flag & MNT_RDONLY)
1100 error = EJUSTRETURN;
1102 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
1103 cnp->cn_flags |= SAVENAME;
1111 * Just call nfs_bioread() to do the work.
1114 nfs4_read(struct vop_read_args *ap)
1116 struct vnode *vp = ap->a_vp;
1118 switch (vp->v_type) {
1120 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred));
1124 return (EOPNOTSUPP);
1132 nfs4_readlink(struct vop_readlink_args *ap)
1134 struct vnode *vp = ap->a_vp;
1136 if (vp->v_type != VLNK)
1138 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred));
1142 * Do a readlink rpc.
1143 * Called by nfs_doio() from below the buffer cache.
1146 nfs4_readlinkrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1150 struct mbuf *mreq, *mrep = NULL, *md, *mb;
1151 struct nfs4_compound cp;
1153 nfsstats.rpccnt[NFSPROC_READLINK]++;
1155 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0);
1157 bpos = mtod(mb, caddr_t);
1159 nfs_v4initcompound(&cp);
1161 nfsm_v4build_compound(&cp, "nfs4_readlinkrpc()");
1162 nfsm_v4build_putfh(&cp, vp);
1163 nfsm_v4build_readlink(&cp);
1164 nfsm_v4build_finalize(&cp);
1166 nfsm_request(vp, NFSV4PROC_COMPOUND, uiop->uio_td, cred);
1170 nfsm_v4dissect_compound(&cp);
1171 nfsm_v4dissect_putfh(&cp);
1172 nfsm_v4dissect_readlink(&cp, uiop);
1175 error = nfs_v4postop(&cp, error);
1187 nfs4_readrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1190 struct mbuf *mreq, *mrep = NULL, *md, *mb;
1191 struct nfsmount *nmp;
1192 int error = 0, len, tsiz;
1193 struct nfs4_compound cp;
1194 struct nfs4_oparg_read read;
1195 struct nfsnode *np = VTONFS(vp);
1197 nmp = VFSTONFS(vp->v_mount);
1198 tsiz = uiop->uio_resid;
1199 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1206 read.fcp = np->n_rfc.refcnt > 0 ? &np->n_rfc : &np->n_wfc;
1209 nfsstats.rpccnt[NFSPROC_READ]++;
1210 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
1212 read.off = uiop->uio_offset;
1214 nfs_v4initcompound(&cp);
1216 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0);
1218 bpos = mtod(mb, caddr_t);
1220 nfsm_v4build_compound(&cp, "nfs4_readrpc()");
1221 nfsm_v4build_putfh(&cp, vp);
1222 nfsm_v4build_read(&cp, &read);
1223 nfsm_v4build_finalize(&cp);
1225 nfsm_request(vp, NFSV4PROC_COMPOUND, uiop->uio_td, cred);
1227 error = nfs_v4postop(&cp, error);
1231 nfsm_v4dissect_compound(&cp);
1232 nfsm_v4dissect_putfh(&cp);
1233 nfsm_v4dissect_read(&cp, &read);
1235 if (read.eof || read.retlen == 0)
1238 tsiz -= read.retlen;
1240 error = nfs_v4postop(&cp, error);
1256 nfs4_writerpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
1257 int *iomode, int *must_commit)
1261 struct mbuf *mreq, *mrep = NULL, *md, *mb;
1262 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1263 int error = 0, len, tsiz, wccflag = 1, rlen;
1264 struct nfs4_compound cp;
1265 struct nfs4_oparg_write write;
1266 nfsv4stablehow commit, committed = NSHFILESYNC;
1268 struct nfsnode *np = VTONFS(vp);
1271 if (uiop->uio_iovcnt != 1)
1272 panic("nfs: writerpc iovcnt > 1");
1275 tsiz = uiop->uio_resid;
1276 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1282 write.stable = (nfsv4stablehow)*iomode;
1284 write.fcp = &np->n_wfc;
1287 nfsstats.rpccnt[NFSPROC_WRITE]++;
1288 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
1290 write.off = uiop->uio_offset;
1292 nfs_v4initcompound(&cp);
1294 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0);
1296 bpos = mtod(mb, caddr_t);
1298 nfsm_v4build_compound(&cp, "nfs4_writerpc()");
1299 nfsm_v4build_putfh(&cp, vp);
1300 nfsm_v4build_write(&cp, &write);
1301 nfsm_v4build_finalize(&cp);
1303 nfsm_request(vp, NFSV4PROC_COMPOUND, uiop->uio_td, cred);
1305 error = nfs_v4postop(&cp, error);
1309 nfsm_v4dissect_compound(&cp);
1310 nfsm_v4dissect_putfh(&cp);
1311 nfsm_v4dissect_write(&cp, &write);
1313 rlen = write.retlen;
1317 } else if (rlen < len) {
1318 backup = len - rlen;
1319 uiop->uio_iov->iov_base =
1320 (char *)uiop->uio_iov->iov_base - backup;
1321 uiop->uio_iov->iov_len += backup;
1322 uiop->uio_offset -= backup;
1323 uiop->uio_resid += backup;
1327 commit = write.committed;
1329 if (committed == NSHFILESYNC ||
1330 (committed = NSHDATASYNC && commit == NSHUNSTABLE))
1333 verf = (caddr_t)write.wverf;
1335 if ((nmp->nm_flag & NFSSTA_HASWRITEVERF) == 0) {
1336 bcopy(verf, nmp->nm_verf, NFSX_V4VERF);
1337 nmp->nm_flag |= NFSMNT_HASWRITEVERF;
1338 } else if (bcmp(verf, nmp->nm_verf, NFSX_V4VERF)) {
1340 bcopy(verf, nmp->nm_verf, NFSX_V4VERF);
1345 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime;
1347 error = nfs_v4postop(&cp, error);
1358 *iomode = committed;
1360 uiop->uio_resid = tsiz;
1366 nfs4_mknod(struct vop_mknod_args *ap)
1368 struct vattr *vap = ap->a_vap;
1369 struct vnode *newvp = NULL;
1372 error = nfs4_createrpc(ap->a_dvp, &newvp,
1373 ap->a_cnp, (nfstype)vap->va_type, vap, NULL);
1375 /* XXX - is this actually referenced here? */
1385 nfs4_createrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1386 nfstype ftype, struct vattr *vap, char *linktarget)
1388 struct nfsnode *dnp = VTONFS(dvp);
1389 struct nfsnode *np = NULL;
1390 struct vnode *newvp = NULL;
1391 struct nfs4_compound cp;
1392 struct nfs4_oparg_create c;
1393 struct nfs4_oparg_getattr ga;
1394 struct nfs4_oparg_getfh gfh;
1396 struct mbuf *mreq, *mrep = NULL, *md, *mb;
1399 nfsstats.rpccnt[NFSPROC_CREATE]++;
1401 mreq = nfsm_reqhead(dvp, NFSV4PROC_COMPOUND, 0);
1403 bpos = mtod(mb, caddr_t);
1405 bzero(&c, sizeof(c));
1406 bzero(&ga, sizeof(ga));
1410 c.linktext = linktarget;
1411 c.name = cnp->cn_nameptr;
1412 c.namelen = cnp->cn_namelen;
1414 ga.bm = &nfsv4_getattrbm;
1415 nfs_v4initcompound(&cp);
1417 nfsm_v4build_compound(&cp, "nfs4_createrpc()");
1418 nfsm_v4build_putfh(&cp, dvp);
1419 nfsm_v4build_create(&cp, &c);
1420 nfsm_v4build_getattr(&cp, &ga);
1421 nfsm_v4build_getfh(&cp, &gfh);
1422 nfsm_v4build_finalize(&cp);
1424 nfsm_request(dvp, NFSV4PROC_COMPOUND, cnp->cn_thread, cnp->cn_cred);
1428 nfsm_v4dissect_compound(&cp);
1429 nfsm_v4dissect_putfh(&cp);
1430 nfsm_v4dissect_create(&cp, &c);
1431 nfsm_v4dissect_getattr(&cp, &ga);
1432 nfsm_v4dissect_getfh(&cp, &gfh);
1434 error = nfs_nget(dvp->v_mount, &gfh.fh_val, gfh.fh_len, &np);
1439 nfs4_vnop_loadattrcache(newvp, &ga.fa, NULL);
1441 if (cnp->cn_flags & MAKEENTRY)
1442 cache_enter(dvp, newvp, cnp);
1444 dnp->n_flag |= NMODIFIED;
1445 dnp->n_attrstamp = 0;
1448 error = nfs_v4postop(&cp, error);
1454 /*FREE(cnp->cn_pnbuf, M_NAMEI);*/
1455 if (error != 0 && newvp != NULL)
1457 else if (error == 0)
1464 nfs4_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen,
1465 struct vnode *tdvp, const char *tnameptr, int tnamelen,
1466 struct ucred *cred, struct thread *td)
1469 struct nfsnode *fnp = VTONFS(fdvp), *tnp = VTONFS(tdvp);
1471 struct mbuf *mreq, *mrep = NULL, *md, *mb;
1472 struct nfs4_compound cp;
1473 struct nfs4_oparg_rename r;
1476 nfsstats.rpccnt[NFSPROC_RENAME]++;
1479 r.fnamelen = fnamelen;
1481 r.tnamelen = tnamelen;
1482 nfs_v4initcompound(&cp);
1484 mreq = nfsm_reqhead(fdvp, NFSV4PROC_COMPOUND, 0);
1486 bpos = mtod(mb, caddr_t);
1488 nfsm_v4build_compound(&cp, "nfs4_renamerpc()");
1489 nfsm_v4build_putfh(&cp, fdvp);
1490 nfsm_v4build_savefh(&cp);
1491 nfsm_v4build_putfh(&cp, tdvp);
1492 nfsm_v4build_rename(&cp, &r);
1493 nfsm_v4build_finalize(&cp);
1495 nfsm_request(fdvp, NFSV4PROC_COMPOUND, td, cred);
1499 nfsm_v4dissect_compound(&cp);
1500 nfsm_v4dissect_putfh(&cp);
1501 nfsm_v4dissect_savefh(&cp);
1502 nfsm_v4dissect_putfh(&cp);
1503 nfsm_v4dissect_rename(&cp);
1505 /* XXX should this always be performed? */
1506 fnp->n_flag |= NMODIFIED;
1507 tnp->n_flag |= NMODIFIED;
1508 fnp->n_attrstamp = tnp->n_attrstamp = 0;
1511 error = nfs_v4postop(&cp, error);
1520 * nfs file create call
1523 nfs4_create(struct vop_create_args *ap)
1525 struct vnode *dvp = ap->a_dvp;
1526 struct vattr *vap = ap->a_vap;
1527 struct nfsnode *dnp = VTONFS(dvp);
1528 struct componentname *cnp = ap->a_cnp;
1529 struct vnode *newvp = NULL;
1530 int error = 0, fmode = (O_CREAT | FREAD | FWRITE);
1533 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_thread)) != 0)
1536 if (vap->va_vaflags & VA_EXCLUSIVE)
1539 error = nfs4_openrpc(dvp, &newvp, cnp, fmode, vap);
1543 VTONFS(newvp)->n_flag |= NCREATED;
1545 if (cnp->cn_flags & MAKEENTRY)
1546 cache_enter(dvp, newvp, cnp);
1550 dnp->n_flag |= NMODIFIED;
1551 dnp->n_attrstamp = 0; /* XXX; wccflag */
1558 * nfs file remove call
1559 * To try and make nfs semantics closer to ufs semantics, a file that has
1560 * other processes using the vnode is renamed instead of removed and then
1561 * removed later on the last close.
1562 * - If v_usecount > 1
1563 * If a rename is not already in the works
1564 * call nfs4_sillyrename() to set it up
1569 nfs4_remove(struct vop_remove_args *ap)
1571 struct vnode *vp = ap->a_vp;
1572 struct vnode *dvp = ap->a_dvp;
1573 struct componentname *cnp = ap->a_cnp;
1574 struct nfsnode *np = VTONFS(vp);
1579 if ((cnp->cn_flags & HASBUF) == 0)
1580 panic("nfs4_remove: no name");
1581 if (vrefcnt(vp) < 1)
1582 panic("nfs4_remove: bad v_usecount");
1584 if (vp->v_type == VDIR)
1586 else if (vrefcnt(vp) == 1 || (np->n_sillyrename &&
1587 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_thread) == 0 &&
1588 vattr.va_nlink > 1)) {
1590 * Purge the name cache so that the chance of a lookup for
1591 * the name succeeding while the remove is in progress is
1592 * minimized. Without node locking it can still happen, such
1593 * that an I/O op returns ESTALE, but since you get this if
1594 * another host removes the file..
1598 * throw away biocache buffers, mainly to avoid
1599 * unnecessary delayed writes later.
1601 error = nfs_vinvalbuf(vp, 0, cnp->cn_thread, 1);
1604 error = nfs4_removerpc(dvp, cnp->cn_nameptr,
1605 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread);
1607 * Kludge City: If the first reply to the remove rpc is lost..
1608 * the reply to the retransmitted request will be ENOENT
1609 * since the file was in fact removed
1610 * Therefore, we cheat and return success.
1612 if (error == ENOENT)
1614 } else if (!np->n_sillyrename)
1615 error = nfs4_sillyrename(dvp, vp, cnp);
1616 np->n_attrstamp = 0;
1621 * nfs file remove rpc called from nfs_inactive
1624 nfs4_removeit(struct sillyrename *sp)
1627 * Make sure that the directory vnode is still valid.
1628 * XXX we should lock sp->s_dvp here.
1630 if (sp->s_dvp->v_type == VBAD)
1632 return (nfs4_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred,
1637 * Nfs remove rpc, called from nfs4_remove() and nfs4_removeit().
1640 nfs4_removerpc(struct vnode *dvp, const char *name, int namelen,
1641 struct ucred *cred, struct thread *td)
1645 struct mbuf *mreq, *mrep = NULL, *md, *mb;
1646 struct nfs4_compound cp;
1648 nfsstats.rpccnt[NFSPROC_REMOVE]++;
1650 mreq = nfsm_reqhead(dvp, NFSV4PROC_COMPOUND, 0);
1652 bpos = mtod(mb, caddr_t);
1654 nfs_v4initcompound(&cp);
1656 nfsm_v4build_compound(&cp, "nfs4_removerpc()");
1657 nfsm_v4build_putfh(&cp, dvp);
1658 nfsm_v4build_remove(&cp, name, namelen);
1659 nfsm_v4build_finalize(&cp);
1661 nfsm_request(dvp, NFSV4PROC_COMPOUND, td, cred);
1665 nfsm_v4dissect_compound(&cp);
1666 nfsm_v4dissect_putfh(&cp);
1667 nfsm_v4dissect_remove(&cp);
1670 error = nfs_v4postop(&cp, error);
1675 VTONFS(dvp)->n_flag |= NMODIFIED;
1676 VTONFS(dvp)->n_attrstamp = 0; /* XXX wccflag */
1682 * nfs file rename call
1685 nfs4_rename(struct vop_rename_args *ap)
1687 struct vnode *fvp = ap->a_fvp;
1688 struct vnode *tvp = ap->a_tvp;
1689 struct vnode *fdvp = ap->a_fdvp;
1690 struct vnode *tdvp = ap->a_tdvp;
1691 struct componentname *tcnp = ap->a_tcnp;
1692 struct componentname *fcnp = ap->a_fcnp;
1696 if ((tcnp->cn_flags & HASBUF) == 0 ||
1697 (fcnp->cn_flags & HASBUF) == 0)
1698 panic("nfs4_rename: no name");
1700 /* Check for cross-device rename */
1701 if ((fvp->v_mount != tdvp->v_mount) ||
1702 (tvp && (fvp->v_mount != tvp->v_mount))) {
1708 printf("nfs4_rename: fvp == tvp (can't happen)\n");
1712 if ((error = vn_lock(fvp, LK_EXCLUSIVE, fcnp->cn_thread)) != 0)
1716 * We have to flush B_DELWRI data prior to renaming
1717 * the file. If we don't, the delayed-write buffers
1718 * can be flushed out later after the file has gone stale
1719 * under NFSV3. NFSV2 does not have this problem because
1720 * ( as far as I can tell ) it flushes dirty buffers more
1723 VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_thread);
1724 VOP_UNLOCK(fvp, 0, fcnp->cn_thread);
1726 VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_thread);
1729 * If the tvp exists and is in use, sillyrename it before doing the
1730 * rename of the new file over it.
1731 * XXX Can't sillyrename a directory.
1733 if (tvp && vrefcnt(tvp) > 1 && !VTONFS(tvp)->n_sillyrename &&
1734 tvp->v_type != VDIR && !nfs4_sillyrename(tdvp, tvp, tcnp)) {
1739 error = nfs4_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1740 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1743 if (fvp->v_type == VDIR) {
1744 if (tvp != NULL && tvp->v_type == VDIR)
1759 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1761 if (error == ENOENT)
1767 * nfs file rename rpc called from nfs4_remove() above
1770 nfs4_renameit(struct vnode *sdvp, struct componentname *scnp,
1771 struct sillyrename *sp)
1773 return (nfs4_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, sdvp,
1774 sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_thread));
1778 * nfs hard link create call
1781 nfs4_link(struct vop_link_args *ap)
1783 struct vnode *vp = ap->a_vp;
1784 struct vnode *tdvp = ap->a_tdvp;
1785 struct componentname *cnp = ap->a_cnp;
1788 struct mbuf *mreq, *mrep = NULL, *md, *mb;
1789 struct nfs4_compound cp;
1790 struct nfs4_oparg_link l;
1792 if (vp->v_mount != tdvp->v_mount) {
1797 * Push all writes to the server, so that the attribute cache
1798 * doesn't get "out of sync" with the server.
1799 * XXX There should be a better way!
1801 VOP_FSYNC(vp, MNT_WAIT, cnp->cn_thread);
1803 nfsstats.rpccnt[NFSPROC_LINK]++;
1805 l.name = cnp->cn_nameptr;
1806 l.namelen = cnp->cn_namelen;
1807 nfs_v4initcompound(&cp);
1809 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0);
1811 bpos = mtod(mb, caddr_t);
1813 nfsm_v4build_compound(&cp, "nfs4_link()");
1814 nfsm_v4build_putfh(&cp, vp);
1815 nfsm_v4build_savefh(&cp);
1816 nfsm_v4build_putfh(&cp, tdvp);
1817 nfsm_v4build_link(&cp, &l);
1818 nfsm_v4build_finalize(&cp);
1820 nfsm_request(vp, NFSV4PROC_COMPOUND, cnp->cn_thread, cnp->cn_cred);
1824 nfsm_v4dissect_compound(&cp);
1825 nfsm_v4dissect_putfh(&cp);
1826 nfsm_v4dissect_savefh(&cp);
1827 nfsm_v4dissect_putfh(&cp);
1828 nfsm_v4dissect_link(&cp);
1830 VTONFS(tdvp)->n_flag |= NMODIFIED;
1831 VTONFS(vp)->n_attrstamp = 0;
1832 VTONFS(tdvp)->n_attrstamp = 0;
1835 error = nfs_v4postop(&cp, error);
1844 * nfs symbolic link create call
1847 nfs4_symlink(struct vop_symlink_args *ap)
1849 struct vnode *dvp = ap->a_dvp;
1851 struct vnode *newvp = NULL;
1853 nfsstats.rpccnt[NFSPROC_SYMLINK]++;
1855 error = nfs4_createrpc(ap->a_dvp, &newvp, ap->a_cnp, NFLNK,
1856 ap->a_vap, ap->a_target);
1858 if (error != 0 && newvp != NULL)
1860 else if (error == 0)
1863 VTONFS(dvp)->n_flag |= NMODIFIED;
1864 VTONFS(dvp)->n_attrstamp = 0; /* XXX wccflags */
1873 nfs4_mkdir(struct vop_mkdir_args *ap)
1875 return (nfs4_createrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, NFDIR,
1880 * nfs remove directory call
1883 nfs4_rmdir(struct vop_rmdir_args *ap)
1885 struct vnode *vp = ap->a_vp;
1886 struct vnode *dvp = ap->a_dvp;
1887 struct nfsnode *dnp = VTONFS(dvp);
1888 struct componentname *cnp = ap->a_cnp;
1894 error = (nfs4_removerpc(dvp, cnp->cn_nameptr, cnp->cn_namelen, cnp->cn_cred,
1899 dnp->n_flag |= NMODIFIED;
1900 dnp->n_attrstamp = 0;
1911 nfs4_readdir(struct vop_readdir_args *ap)
1913 struct vnode *vp = ap->a_vp;
1914 struct nfsnode *np = VTONFS(vp);
1915 struct uio *uio = ap->a_uio;
1919 if (vp->v_type != VDIR)
1922 * First, check for hit on the EOF offset cache
1924 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
1925 (np->n_flag & NMODIFIED) == 0) {
1926 if (VOP_GETATTR(vp, &vattr, ap->a_cred, uio->uio_td) == 0 &&
1927 np->n_mtime.tv_sec == vattr.va_mtime.tv_sec) {
1928 nfsstats.direofcache_hits++;
1934 * Call nfs_bioread() to do the real work.
1936 tresid = uio->uio_resid;
1937 error = nfs_bioread(vp, uio, 0, ap->a_cred);
1939 if (!error && uio->uio_resid == tresid)
1940 nfsstats.direofcache_misses++;
1944 static u_char fty_to_dty[] = {
1945 DT_UNKNOWN, /* NFNON */
1951 DT_SOCK, /* NFSOCK */
1952 DT_FIFO, /* NFFIFO */
1953 DT_UNKNOWN, /* NFATTRDIT */
1954 DT_UNKNOWN, /* NFNAMEDATTR */
1955 DT_UNKNOWN, /* NFBAD */
1960 * Called from below the buffer cache by nfs_doio().
1963 nfs4_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1966 struct dirent *dp = NULL;
1971 struct mbuf *mreq, *mrep = NULL, *md, *mb;
1973 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1974 struct nfsnode *dnp = VTONFS(vp);
1975 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
1976 struct nfs4_compound cp;
1977 struct nfs4_oparg_readdir readdir;
1978 struct nfsv4_fattr fattr;
1982 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
1983 (uiop->uio_resid & (DIRBLKSIZ - 1)))
1984 panic("nfs readdirrpc bad uio");
1988 * If there is no cookie, assume directory was stale.
1990 cookiep = nfs4_getcookie(dnp, uiop->uio_offset, 0);
1994 return (NFSERR_BAD_COOKIE);
1996 /* Generate fake entries for "." and ".." */
1997 while (cookie < 2 && bigenough) {
2001 if (len > uiop->uio_resid) {
2005 dp = (struct dirent *)uiop->uio_iov->iov_base;
2007 dp->d_namlen = cookie;
2009 dp->d_type = DT_DIR;
2011 dp->d_fileno = dnp->n_vattr.va_fileid; /* XXX has problems with pynfs virtualhandles */
2013 dp->d_fileno = dnp->n_dvp != NULL ?
2014 VTONFS(dnp->n_dvp)->n_vattr.va_fileid : cookie;
2023 if (blksiz == DIRBLKSIZ)
2025 uiop->uio_offset += len;
2026 uiop->uio_resid -= len;
2027 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + len;
2028 uiop->uio_iov->iov_len -= len;
2034 /* This is sort of ugly, to prevent v4postop() from acting weird */
2035 bzero(&cp, sizeof(cp));
2038 * Loop around doing readdir rpc's of size nm_readdirsize
2039 * truncated to a multiple of DIRBLKSIZ.
2040 * The stopping criteria is EOF or buffer full.
2043 * XXX this is sort of ugly for nfsv4; we don't maintain the
2044 * strict abstraction, but do the decoding inline. that's ok.
2046 while (more_dirs && bigenough) {
2047 nfsstats.rpccnt[NFSPROC_READDIR]++;
2049 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0);
2051 bpos = mtod(mb, caddr_t);
2053 readdir.cnt = nmp->nm_readdirsize;
2054 readdir.cookie = cookie;
2055 readdir.bm = &nfsv4_readdirbm;
2057 bzero(&readdir.verf, sizeof(readdir.verf));
2059 bcopy(&dnp->n_cookieverf, &readdir.verf,
2060 sizeof(readdir.verf));
2062 nfs_v4initcompound(&cp);
2064 nfsm_v4build_compound(&cp, "nfs4_readdirrpc()");
2065 nfsm_v4build_putfh(&cp, vp);
2066 nfsm_v4build_readdir(&cp, &readdir);
2067 nfsm_v4build_finalize(&cp);
2069 nfsm_request(vp, NFSV4PROC_COMPOUND, uiop->uio_td, cred);
2073 nfsm_v4dissect_compound(&cp);
2074 nfsm_v4dissect_putfh(&cp);
2077 * XXX - Readdir gets handled inline like in
2078 * NFSv{2,3}. This is a nasty inconsistency and
2082 tl = nfsm_dissect(uint32_t *, 5 * NFSX_UNSIGNED);
2083 if (fxdr_unsigned(uint32_t, *tl++) != NFSV4OP_READDIR) {
2087 if (fxdr_unsigned(uint32_t, *tl++) != 0) {
2092 bcopy(tl, &dnp->n_cookieverf, NFSX_V4VERF);
2094 more_dirs = fxdr_unsigned(int, *tl++);
2096 /* loop thru the dir entries, doctoring them to 4bsd form */
2097 while (more_dirs && bigenough) {
2098 tl = nfsm_dissect(uint32_t *, 3 * NFSX_UNSIGNED);
2099 cookie = fxdr_hyper(tl);
2101 /* XXX cookie sanity check */
2102 len = fxdr_unsigned(int, *tl++);
2103 if (len <= 0 || len > NFS_MAXNAMLEN) {
2107 tlen = nfsm_rndup(len);
2109 tlen += 4; /* To ensure null termination */
2110 left = DIRBLKSIZ - blksiz;
2111 if ((tlen + DIRHDSIZ) > left) {
2112 dp->d_reclen += left;
2113 uiop->uio_iov->iov_base =
2114 (char *)uiop->uio_iov->iov_base + left;
2115 uiop->uio_iov->iov_len -= left;
2116 uiop->uio_offset += left;
2117 uiop->uio_resid -= left;
2120 if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2123 dp = (struct dirent *)uiop->uio_iov->iov_base;
2126 dp->d_reclen = tlen + DIRHDSIZ;
2128 blksiz += dp->d_reclen;
2129 if (blksiz == DIRBLKSIZ)
2131 uiop->uio_offset += DIRHDSIZ;
2132 uiop->uio_resid -= DIRHDSIZ;
2133 uiop->uio_iov->iov_base =
2134 (char *)uiop->uio_iov->iov_base + DIRHDSIZ;
2135 uiop->uio_iov->iov_len -= DIRHDSIZ;
2138 nfsm_mtouio(uiop, len);
2139 p = uiop->uio_iov->iov_base;
2141 *p = '\0'; /* null terminate */
2142 /* printf("nfs4_readdirrpc: name: \"%s\" cookie %d\n",
2143 p - len, (int) cookie);*/
2144 uiop->uio_iov->iov_base =
2145 (char *)uiop->uio_iov->iov_base + tlen;
2146 uiop->uio_iov->iov_len -= tlen;
2147 uiop->uio_offset += tlen;
2148 uiop->uio_resid -= tlen;
2150 /* Copy attributes */
2151 nfsm_v4dissect_attrs(&fattr);
2153 dp->d_fileno = nfs_v4fileid4_to_fileid(
2154 fattr.fa4_valid & FA4V_FILEID &&
2156 fattr.fa4_fileid : cookie);
2158 fty = (u_int)fattr.fa4_type;
2159 dp->d_type = fattr.fa4_valid & FA4V_TYPE &&
2160 (fty < sizeof(fty_to_dty)) ?
2161 fty_to_dty[fty] : DT_UNKNOWN;
2163 nfsm_adv(nfsm_rndup(len));
2165 tl = nfsm_dissect(uint32_t *, NFSX_UNSIGNED);
2166 more_dirs = fxdr_unsigned(int, *tl++);
2169 * If at end of rpc data, get the eof boolean
2172 tl = nfsm_dissect(u_int32_t *, NFSX_UNSIGNED);
2173 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2176 error = nfs_v4postop(&cp, error);
2182 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2183 * by increasing d_reclen for the last record.
2186 left = DIRBLKSIZ - blksiz;
2187 dp->d_reclen += left;
2188 uiop->uio_iov->iov_base =
2189 (char *)uiop->uio_iov->iov_base + left;
2190 uiop->uio_iov->iov_len -= left;
2191 uiop->uio_offset += left;
2192 uiop->uio_resid -= left;
2196 * We are now either at the end of the directory or have filled the
2200 dnp->n_direofoffset = uiop->uio_offset;
2202 if (uiop->uio_resid > 0)
2203 printf("EEK! readdirrpc resid > 0\n");
2204 cookiep = nfs4_getcookie(dnp, uiop->uio_offset, 1);
2214 * Silly rename. To make the NFS filesystem that is stateless look a little
2215 * more like the "ufs" a remove of an active vnode is translated to a rename
2216 * to a funny looking filename that is removed by nfs_inactive on the
2217 * nfsnode. There is the potential for another process on a different client
2218 * to create the same funny name between the nfs_lookitup() fails and the
2219 * nfs_rename() completes, but...
2222 nfs4_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
2224 struct sillyrename *sp;
2232 if (vp->v_type == VDIR)
2233 panic("nfs: sillyrename dir");
2235 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2236 M_NFSREQ, M_WAITOK);
2237 sp->s_cred = crhold(cnp->cn_cred);
2239 sp->s_removeit = nfs4_removeit;
2242 /* Fudge together a funny name */
2243 pid = cnp->cn_thread->td_proc->p_pid;
2244 sp->s_namlen = sprintf(sp->s_name, ".nfsA%04x4.4", pid);
2246 /* Try lookitups until we get one that isn't there */
2247 while (nfs4_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2248 cnp->cn_thread, NULL) == 0) {
2250 if (sp->s_name[4] > 'z') {
2255 error = nfs4_renameit(dvp, cnp, sp);
2258 error = nfs4_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2259 cnp->cn_thread, &np);
2260 np->n_sillyrename = sp;
2265 free((caddr_t)sp, M_NFSREQ);
2270 * Look up a file name and optionally either update the file handle or
2271 * allocate an nfsnode, depending on the value of npp.
2272 * npp == NULL --> just do the lookup
2273 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2275 * *npp != NULL --> update the file handle in the vnode
2278 nfs4_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred,
2279 struct thread *td, struct nfsnode **npp)
2281 struct vnode *newvp = NULL;
2282 struct nfsnode *np, *dnp = VTONFS(dvp);
2284 int error = 0, fhlen;
2285 struct mbuf *mreq, *mrep = NULL, *md, *mb;
2287 struct nfs4_compound cp;
2288 struct nfs4_oparg_lookup l;
2289 struct nfs4_oparg_getfh gfh;
2290 struct nfs4_oparg_getattr ga;
2292 nfsstats.rpccnt[NFSPROC_RENAME]++;
2294 mreq = nfsm_reqhead(dvp, NFSV4PROC_COMPOUND, 0);
2296 bpos = mtod(mb, caddr_t);
2301 nfs_v4initcompound(&cp);
2303 ga.bm = &nfsv4_getattrbm;
2305 nfsm_v4build_compound(&cp, "nfs4_renamerpc()");
2306 nfsm_v4build_putfh(&cp, dvp);
2307 nfsm_v4build_lookup(&cp, &l);
2308 nfsm_v4build_getfh(&cp, &gfh);
2309 nfsm_v4build_getattr(&cp, &ga);
2311 nfsm_request(dvp, NFSV4PROC_COMPOUND, td, cred);
2315 nfsm_v4dissect_compound(&cp);
2316 nfsm_v4dissect_putfh(&cp);
2317 nfsm_v4dissect_lookup(&cp);
2318 nfsm_v4dissect_getfh(&cp, &gfh);
2319 nfsm_v4dissect_getattr(&cp, &ga);
2321 if (npp != NULL && error == 0) {
2327 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
2328 free((caddr_t)np->n_fhp, M_NFSBIGFH);
2329 np->n_fhp = &np->n_fh;
2330 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
2331 np->n_fhp =(nfsfh_t *)malloc(fhlen, M_NFSBIGFH, M_WAITOK);
2332 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen);
2333 np->n_fhsize = fhlen;
2335 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
2339 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np);
2349 np->n_namelen = len;
2350 if (np->n_name != NULL)
2351 FREE(np->n_name, M_NFSREQ);
2352 MALLOC(np->n_name, u_char *,
2353 np->n_namelen + 1, M_NFSREQ, M_WAITOK);
2354 memcpy(np->n_name, name, len);
2355 np->n_name[len] = '\0';
2357 nfs4_vnop_loadattrcache(newvp, &ga.fa, NULL);
2361 error = nfs_v4postop(&cp, error);
2365 if (npp && *npp == NULL) {
2382 * Nfs Version 3 commit rpc
2385 nfs4_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred,
2388 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2391 struct mbuf *mreq, *mrep = NULL, *md, *mb;
2392 struct nfs4_compound cp;
2393 struct nfs4_oparg_commit commit;
2395 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0)
2397 nfsstats.rpccnt[NFSPROC_COMMIT]++;
2399 mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0);
2401 bpos = mtod(mb, caddr_t);
2403 commit.start = offset;
2406 nfs_v4initcompound(&cp);
2408 nfsm_v4build_compound(&cp, "nfs4_commit()");
2409 nfsm_v4build_putfh(&cp, vp);
2410 nfsm_v4build_commit(&cp, &commit);
2411 nfsm_v4build_finalize(&cp);
2413 nfsm_request(vp, NFSV4PROC_COMPOUND, td, cred);
2417 nfsm_v4dissect_compound(&cp);
2418 nfsm_v4dissect_putfh(&cp);
2419 nfsm_v4dissect_commit(&cp, &commit);
2422 /* nfsm_wcc_data(vp, wccflag);*/
2423 if (bcmp(nmp->nm_verf, commit.verf, NFSX_V4VERF)) {
2424 bcopy(commit.verf, nmp->nm_verf, NFSX_V4VERF);
2425 error = NFSERR_STALEWRITEVERF;
2429 error = nfs_v4postop(&cp, error);
2438 * For async requests when nfsiod(s) are running, queue the request by
2439 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the
2443 nfs4_strategy(struct vop_strategy_args *ap)
2445 struct buf *bp = ap->a_bp;
2450 KASSERT(!(bp->b_flags & B_DONE), ("nfs4_strategy: buffer %p unexpectedly marked B_DONE", bp));
2451 KASSERT(BUF_REFCNT(bp) > 0, ("nfs4_strategy: buffer %p not locked", bp));
2453 if (bp->b_flags & B_ASYNC)
2456 td = curthread; /* XXX */
2458 if (bp->b_iocmd == BIO_READ)
2464 * If the op is asynchronous and an i/o daemon is waiting
2465 * queue the request, wake it up and wait for completion
2466 * otherwise just do it ourselves.
2468 if ((bp->b_flags & B_ASYNC) == 0 ||
2469 nfs_asyncio(VFSTONFS(ap->a_vp->v_mount), bp, NOCRED, td))
2470 error = nfs_doio(ap->a_vp, bp, cr, td);
2475 * fsync vnode op. Just call nfs4_flush() with commit == 1.
2479 nfs4_fsync(struct vop_fsync_args *ap)
2481 return (nfs4_flush(ap->a_vp, ap->a_waitfor, ap->a_td, 1));
2485 * Flush all the blocks associated with a vnode.
2486 * Walk through the buffer pool and push any dirty pages
2487 * associated with the vnode.
2490 nfs4_flush(struct vnode *vp, int waitfor, struct thread *td,
2493 struct nfsnode *np = VTONFS(vp);
2497 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2498 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2500 u_quad_t off, endoff, toff;
2501 struct ucred* wcred = NULL;
2502 struct buf **bvec = NULL;
2503 #ifndef NFS_COMMITBVECSIZ
2504 #define NFS_COMMITBVECSIZ 20
2506 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2507 int bvecsize = 0, bveccount;
2509 if (nmp->nm_flag & NFSMNT_INT)
2514 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2515 * server, but nas not been committed to stable storage on the server
2516 * yet. On the first pass, the byte range is worked out and the commit
2517 * rpc is done. On the second pass, nfs_writebp() is called to do the
2524 if (NFS_ISV3(vp) && commit) {
2526 if (bvec != NULL && bvec != bvec_on_stack)
2529 * Count up how many buffers waiting for a commit.
2533 TAILQ_FOREACH_SAFE(bp, &vp->v_bufobj.bo_dirty.bv_hd, b_bobufs, nbp) {
2534 if (BUF_REFCNT(bp) == 0 &&
2535 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2536 == (B_DELWRI | B_NEEDCOMMIT))
2540 * Allocate space to remember the list of bufs to commit. It is
2541 * important to use M_NOWAIT here to avoid a race with nfs4_write.
2542 * If we can't get memory (for whatever reason), we will end up
2543 * committing the buffers one-by-one in the loop below.
2545 if (bveccount > NFS_COMMITBVECSIZ) {
2547 * Release the vnode interlock to avoid a lock
2551 bvec = (struct buf **)
2552 malloc(bveccount * sizeof(struct buf *),
2556 bvec = bvec_on_stack;
2557 bvecsize = NFS_COMMITBVECSIZ;
2559 bvecsize = bveccount;
2561 bvec = bvec_on_stack;
2562 bvecsize = NFS_COMMITBVECSIZ;
2564 TAILQ_FOREACH_SAFE(bp, &vp->v_bufobj.bo_dirty.bv_hd, b_bobufs, nbp) {
2565 if (bvecpos >= bvecsize)
2567 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2568 nbp = TAILQ_NEXT(bp, b_bobufs);
2571 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2572 (B_DELWRI | B_NEEDCOMMIT)) {
2574 nbp = TAILQ_NEXT(bp, b_bobufs);
2580 * Work out if all buffers are using the same cred
2581 * so we can deal with them all with one commit.
2583 * NOTE: we are not clearing B_DONE here, so we have
2584 * to do it later on in this routine if we intend to
2585 * initiate I/O on the bp.
2587 * Note: to avoid loopback deadlocks, we do not
2588 * assign b_runningbufspace.
2591 wcred = bp->b_wcred;
2592 else if (wcred != bp->b_wcred)
2594 vfs_busy_pages(bp, 1);
2598 * bp is protected by being locked, but nbp is not
2599 * and vfs_busy_pages() may sleep. We have to
2602 nbp = TAILQ_NEXT(bp, b_bobufs);
2605 * A list of these buffers is kept so that the
2606 * second loop knows which buffers have actually
2607 * been committed. This is necessary, since there
2608 * may be a race between the commit rpc and new
2609 * uncommitted writes on the file.
2611 bvec[bvecpos++] = bp;
2612 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2616 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2625 * Commit data on the server, as required.
2626 * If all bufs are using the same wcred, then use that with
2627 * one call for all of them, otherwise commit each one
2630 if (wcred != NOCRED)
2631 retv = nfs4_commit(vp, off, (int)(endoff - off),
2635 for (i = 0; i < bvecpos; i++) {
2638 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2640 size = (u_quad_t)(bp->b_dirtyend
2642 retv = nfs4_commit(vp, off, (int)size,
2648 if (retv == NFSERR_STALEWRITEVERF)
2649 nfs_clearcommit(vp->v_mount);
2652 * Now, either mark the blocks I/O done or mark the
2653 * blocks dirty, depending on whether the commit
2656 for (i = 0; i < bvecpos; i++) {
2658 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
2661 * Error, leave B_DELWRI intact
2663 vfs_unbusy_pages(bp);
2667 * Success, remove B_DELWRI ( bundirty() ).
2669 * b_dirtyoff/b_dirtyend seem to be NFS
2670 * specific. We should probably move that
2671 * into bundirty(). XXX
2674 bufobj_wref(&vp->v_bufobj);
2675 bp->b_flags |= B_ASYNC;
2677 bp->b_flags &= ~B_DONE;
2678 bp->b_ioflags &= ~BIO_ERROR;
2679 bp->b_dirtyoff = bp->b_dirtyend = 0;
2687 * Start/do any write(s) that are required.
2692 TAILQ_FOREACH_SAFE(bp, &vp->v_bufobj.bo_dirty.bv_hd, b_bobufs, nbp) {
2693 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2694 if (waitfor != MNT_WAIT || passone)
2697 error = BUF_TIMELOCK(bp,
2698 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK,
2699 VI_MTX(vp), "nfsfsync", slpflag, slptimeo);
2702 panic("nfs4_fsync: inconsistent lock");
2703 if (error == ENOLCK)
2705 if (nfs4_sigintr(nmp, NULL, td)) {
2709 if (slpflag == PCATCH) {
2715 if ((bp->b_flags & B_DELWRI) == 0)
2716 panic("nfs4_fsync: not dirty");
2717 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
2723 if (passone || !commit)
2724 bp->b_flags |= B_ASYNC;
2726 bp->b_flags |= B_ASYNC;
2737 if (waitfor == MNT_WAIT) {
2738 while (vp->v_bufobj.bo_numoutput) {
2739 error = bufobj_wwait(&vp->v_bufobj, slpflag, slptimeo);
2742 if (nfs4_sigintr(nmp, NULL, td)) {
2746 if (slpflag == PCATCH) {
2753 if (vp->v_bufobj.bo_dirty.bv_cnt > 0 && commit) {
2759 if (np->n_flag & NWRITEERR) {
2760 error = np->n_error;
2761 np->n_flag &= ~NWRITEERR;
2764 if (bvec != NULL && bvec != bvec_on_stack)
2770 * NFS advisory byte-level locks.
2773 nfs4_advlock(struct vop_advlock_args *ap)
2777 if ((VFSTONFS(ap->a_vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
2778 struct nfsnode *np = VTONFS(ap->a_vp);
2780 return (lf_advlock(ap, &(np->n_lockf), np->n_size));
2782 return (nfs_dolock(ap));
2786 * Print out the contents of an nfsnode.
2789 nfs4_print(struct vop_print_args *ap)
2791 struct vnode *vp = ap->a_vp;
2792 struct nfsnode *np = VTONFS(vp);
2794 printf("\tfileid %ld fsid 0x%x",
2795 np->n_vattr.va_fileid, np->n_vattr.va_fsid);
2796 if (vp->v_type == VFIFO)
2803 * This is the "real" nfs::bwrite(struct buf*).
2804 * We set B_CACHE if this is a VMIO buffer.
2807 nfs4_writebp(struct buf *bp, int force __unused, struct thread *td)
2810 int oldflags = bp->b_flags;
2816 if (BUF_REFCNT(bp) == 0)
2817 panic("bwrite: buffer is not locked???");
2819 if (bp->b_flags & B_INVAL) {
2824 bp->b_flags |= B_CACHE;
2827 * Undirty the bp. We will redirty it later if the I/O fails.
2832 bp->b_flags &= ~B_DONE;
2833 bp->b_ioflags &= ~BIO_ERROR;
2834 bp->b_iocmd = BIO_WRITE;
2836 bufobj_wref(bp->b_bufobj);
2837 curthread->td_proc->p_stats->p_ru.ru_oublock++;
2841 * Note: to avoid loopback deadlocks, we do not
2842 * assign b_runningbufspace.
2844 vfs_busy_pages(bp, 1);
2847 bp->b_iooffset = dbtob(bp->b_blkno);
2850 if( (oldflags & B_ASYNC) == 0) {
2851 int rtval = bufwait(bp);
2853 if (oldflags & B_DELWRI) {
2867 * Just call nfs_writebp() with the force argument set to 1.
2869 * NOTE: B_DONE may or may not be set in a_bp on call.
2872 nfs4_bwrite(struct buf *bp)
2875 return (nfs4_writebp(bp, 1, curthread));
2878 struct buf_ops buf_ops_nfs4 = {
2879 .bop_name = "buf_ops_nfs4",
2880 .bop_write = nfs4_bwrite,
2881 .bop_strategy = bufstrategy,
2882 .bop_sync = bufsync,