1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 1994, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright 2014 Nexenta Systems, Inc. All rights reserved.
24 */
25
26 /*
27 * Copyright (c) 1983,1984,1985,1986,1987,1988,1989 AT&T.
28 * All rights reserved.
29 */
30
31 #include <sys/param.h>
32 #include <sys/types.h>
33 #include <sys/systm.h>
34 #include <sys/cred.h>
35 #include <sys/buf.h>
36 #include <sys/vfs.h>
37 #include <sys/vnode.h>
38 #include <sys/uio.h>
39 #include <sys/stat.h>
40 #include <sys/errno.h>
41 #include <sys/sysmacros.h>
42 #include <sys/statvfs.h>
43 #include <sys/kmem.h>
44 #include <sys/kstat.h>
45 #include <sys/dirent.h>
46 #include <sys/cmn_err.h>
47 #include <sys/debug.h>
48 #include <sys/vtrace.h>
49 #include <sys/mode.h>
50 #include <sys/acl.h>
51 #include <sys/nbmlock.h>
52 #include <sys/policy.h>
53 #include <sys/sdt.h>
54
55 #include <rpc/types.h>
56 #include <rpc/auth.h>
57 #include <rpc/svc.h>
58
59 #include <nfs/nfs.h>
60 #include <nfs/export.h>
61 #include <nfs/nfs_cmd.h>
62
63 #include <vm/hat.h>
64 #include <vm/as.h>
65 #include <vm/seg.h>
66 #include <vm/seg_map.h>
67 #include <vm/seg_kmem.h>
68
69 #include <sys/strsubr.h>
70
71 /*
72 * These are the interface routines for the server side of the
73 * Network File System. See the NFS version 2 protocol specification
74 * for a description of this interface.
75 */
76
77 static int sattr_to_vattr(struct nfssattr *, struct vattr *);
78 static void acl_perm(struct vnode *, struct exportinfo *, struct vattr *,
79 cred_t *);
80
81 /*
82 * Some "over the wire" UNIX file types. These are encoded
83 * into the mode. This needs to be fixed in the next rev.
84 */
85 #define IFMT 0170000 /* type of file */
86 #define IFCHR 0020000 /* character special */
87 #define IFBLK 0060000 /* block special */
88 #define IFSOCK 0140000 /* socket */
89
90 u_longlong_t nfs2_srv_caller_id;
91
92 /*
93 * Get file attributes.
94 * Returns the current attributes of the file with the given fhandle.
95 */
96 /* ARGSUSED */
97 void
98 rfs_getattr(fhandle_t *fhp, struct nfsattrstat *ns, struct exportinfo *exi,
99 struct svc_req *req, cred_t *cr, bool_t ro)
100 {
101 int error;
102 vnode_t *vp;
103 struct vattr va;
104
105 vp = nfs_fhtovp(fhp, exi);
106 if (vp == NULL) {
107 ns->ns_status = NFSERR_STALE;
108 return;
109 }
110
111 /*
112 * Do the getattr.
113 */
114 va.va_mask = AT_ALL; /* we want all the attributes */
115
116 error = rfs4_delegated_getattr(vp, &va, 0, cr);
117
118 /* check for overflows */
119 if (!error) {
120 /* Lie about the object type for a referral */
121 if (vn_is_nfs_reparse(vp, cr))
122 va.va_type = VLNK;
123
124 acl_perm(vp, exi, &va, cr);
125 error = vattr_to_nattr(&va, &ns->ns_attr);
126 }
127
128 VN_RELE(vp);
129
130 ns->ns_status = puterrno(error);
131 }
132 void *
133 rfs_getattr_getfh(fhandle_t *fhp)
134 {
135 return (fhp);
136 }
137
138 /*
139 * Set file attributes.
140 * Sets the attributes of the file with the given fhandle. Returns
141 * the new attributes.
142 */
143 /* ARGSUSED */
144 void
145 rfs_setattr(struct nfssaargs *args, struct nfsattrstat *ns,
146 struct exportinfo *exi, struct svc_req *req, cred_t *cr, bool_t ro)
147 {
148 int error;
149 int flag;
150 int in_crit = 0;
151 vnode_t *vp;
152 struct vattr va;
153 struct vattr bva;
154 struct flock64 bf;
155 caller_context_t ct;
156
157
158 vp = nfs_fhtovp(&args->saa_fh, exi);
159 if (vp == NULL) {
160 ns->ns_status = NFSERR_STALE;
161 return;
162 }
163
164 if (rdonly(ro, vp)) {
165 VN_RELE(vp);
166 ns->ns_status = NFSERR_ROFS;
167 return;
168 }
169
170 error = sattr_to_vattr(&args->saa_sa, &va);
171 if (error) {
172 VN_RELE(vp);
173 ns->ns_status = puterrno(error);
174 return;
175 }
176
177 /*
178 * If the client is requesting a change to the mtime,
179 * but the nanosecond field is set to 1 billion, then
180 * this is a flag to the server that it should set the
181 * atime and mtime fields to the server's current time.
182 * The 1 billion number actually came from the client
183 * as 1 million, but the units in the over the wire
184 * request are microseconds instead of nanoseconds.
185 *
186 * This is an overload of the protocol and should be
187 * documented in the NFS Version 2 protocol specification.
188 */
189 if (va.va_mask & AT_MTIME) {
190 if (va.va_mtime.tv_nsec == 1000000000) {
191 gethrestime(&va.va_mtime);
192 va.va_atime = va.va_mtime;
193 va.va_mask |= AT_ATIME;
194 flag = 0;
195 } else
196 flag = ATTR_UTIME;
197 } else
198 flag = 0;
199
200 /*
201 * If the filesystem is exported with nosuid, then mask off
202 * the setuid and setgid bits.
203 */
204 if ((va.va_mask & AT_MODE) && vp->v_type == VREG &&
205 (exi->exi_export.ex_flags & EX_NOSUID))
206 va.va_mode &= ~(VSUID | VSGID);
207
208 ct.cc_sysid = 0;
209 ct.cc_pid = 0;
210 ct.cc_caller_id = nfs2_srv_caller_id;
211 ct.cc_flags = CC_DONTBLOCK;
212
213 /*
214 * We need to specially handle size changes because it is
215 * possible for the client to create a file with modes
216 * which indicate read-only, but with the file opened for
217 * writing. If the client then tries to set the size of
218 * the file, then the normal access checking done in
219 * VOP_SETATTR would prevent the client from doing so,
220 * although it should be legal for it to do so. To get
221 * around this, we do the access checking for ourselves
222 * and then use VOP_SPACE which doesn't do the access
223 * checking which VOP_SETATTR does. VOP_SPACE can only
224 * operate on VREG files, let VOP_SETATTR handle the other
225 * extremely rare cases.
226 * Also the client should not be allowed to change the
227 * size of the file if there is a conflicting non-blocking
228 * mandatory lock in the region of change.
229 */
230 if (vp->v_type == VREG && va.va_mask & AT_SIZE) {
231 if (nbl_need_check(vp)) {
232 nbl_start_crit(vp, RW_READER);
233 in_crit = 1;
234 }
235
236 bva.va_mask = AT_UID | AT_SIZE;
237
238 error = VOP_GETATTR(vp, &bva, 0, cr, &ct);
239
240 if (error) {
241 if (in_crit)
242 nbl_end_crit(vp);
243 VN_RELE(vp);
244 ns->ns_status = puterrno(error);
245 return;
246 }
247
248 if (in_crit) {
249 u_offset_t offset;
250 ssize_t length;
251
252 if (va.va_size < bva.va_size) {
253 offset = va.va_size;
254 length = bva.va_size - va.va_size;
255 } else {
256 offset = bva.va_size;
257 length = va.va_size - bva.va_size;
258 }
259 if (nbl_conflict(vp, NBL_WRITE, offset, length, 0,
260 NULL)) {
261 error = EACCES;
262 }
263 }
264
265 if (crgetuid(cr) == bva.va_uid && !error &&
266 va.va_size != bva.va_size) {
267 va.va_mask &= ~AT_SIZE;
268 bf.l_type = F_WRLCK;
269 bf.l_whence = 0;
270 bf.l_start = (off64_t)va.va_size;
271 bf.l_len = 0;
272 bf.l_sysid = 0;
273 bf.l_pid = 0;
274
275 error = VOP_SPACE(vp, F_FREESP, &bf, FWRITE,
276 (offset_t)va.va_size, cr, &ct);
277 }
278 if (in_crit)
279 nbl_end_crit(vp);
280 } else
281 error = 0;
282
283 /*
284 * Do the setattr.
285 */
286 if (!error && va.va_mask) {
287 error = VOP_SETATTR(vp, &va, flag, cr, &ct);
288 }
289
290 /*
291 * check if the monitor on either vop_space or vop_setattr detected
292 * a delegation conflict and if so, mark the thread flag as
293 * wouldblock so that the response is dropped and the client will
294 * try again.
295 */
296 if (error == EAGAIN && (ct.cc_flags & CC_WOULDBLOCK)) {
297 VN_RELE(vp);
298 curthread->t_flag |= T_WOULDBLOCK;
299 return;
300 }
301
302 if (!error) {
303 va.va_mask = AT_ALL; /* get everything */
304
305 error = rfs4_delegated_getattr(vp, &va, 0, cr);
306
307 /* check for overflows */
308 if (!error) {
309 acl_perm(vp, exi, &va, cr);
310 error = vattr_to_nattr(&va, &ns->ns_attr);
311 }
312 }
313
314 ct.cc_flags = 0;
315
316 /*
317 * Force modified metadata out to stable storage.
318 */
319 (void) VOP_FSYNC(vp, FNODSYNC, cr, &ct);
320
321 VN_RELE(vp);
322
323 ns->ns_status = puterrno(error);
324 }
325 void *
326 rfs_setattr_getfh(struct nfssaargs *args)
327 {
328 return (&args->saa_fh);
329 }
330
331 /*
332 * Directory lookup.
333 * Returns an fhandle and file attributes for file name in a directory.
334 */
335 /* ARGSUSED */
336 void
337 rfs_lookup(struct nfsdiropargs *da, struct nfsdiropres *dr,
338 struct exportinfo *exi, struct svc_req *req, cred_t *cr, bool_t ro)
339 {
340 int error;
341 vnode_t *dvp;
342 vnode_t *vp;
343 struct vattr va;
344 fhandle_t *fhp = da->da_fhandle;
345 struct sec_ol sec = {0, 0};
346 bool_t publicfh_flag = FALSE, auth_weak = FALSE;
347 char *name;
348 struct sockaddr *ca;
349
350 /*
351 * Trusted Extension doesn't support NFSv2. MOUNT
352 * will reject v2 clients. Need to prevent v2 client
353 * access via WebNFS here.
354 */
355 if (is_system_labeled() && req->rq_vers == 2) {
356 dr->dr_status = NFSERR_ACCES;
357 return;
358 }
359
360 /*
361 * Disallow NULL paths
362 */
363 if (da->da_name == NULL || *da->da_name == '\0') {
364 dr->dr_status = NFSERR_ACCES;
365 return;
366 }
367
368 /*
369 * Allow lookups from the root - the default
370 * location of the public filehandle.
371 */
372 if (exi != NULL && (exi->exi_export.ex_flags & EX_PUBLIC)) {
373 dvp = rootdir;
374 VN_HOLD(dvp);
375 } else {
376 dvp = nfs_fhtovp(fhp, exi);
377 if (dvp == NULL) {
378 dr->dr_status = NFSERR_STALE;
379 return;
380 }
381 }
382
383 /*
384 * Not allow lookup beyond root.
385 * If the filehandle matches a filehandle of the exi,
386 * then the ".." refers beyond the root of an exported filesystem.
387 */
388 if (strcmp(da->da_name, "..") == 0 &&
389 EQFID(&exi->exi_fid, (fid_t *)&fhp->fh_len)) {
390 VN_RELE(dvp);
391 dr->dr_status = NFSERR_NOENT;
392 return;
393 }
394
395 ca = (struct sockaddr *)svc_getrpccaller(req->rq_xprt)->buf;
396 name = nfscmd_convname(ca, exi, da->da_name, NFSCMD_CONV_INBOUND,
397 MAXPATHLEN);
398
399 if (name == NULL) {
400 dr->dr_status = NFSERR_ACCES;
401 return;
402 }
403
404 /*
405 * If the public filehandle is used then allow
406 * a multi-component lookup, i.e. evaluate
407 * a pathname and follow symbolic links if
408 * necessary.
409 *
410 * This may result in a vnode in another filesystem
411 * which is OK as long as the filesystem is exported.
412 */
413 if (PUBLIC_FH2(fhp)) {
414 publicfh_flag = TRUE;
415 error = rfs_publicfh_mclookup(name, dvp, cr, &vp, &exi,
416 &sec);
417 } else {
418 /*
419 * Do a normal single component lookup.
420 */
421 error = VOP_LOOKUP(dvp, name, &vp, NULL, 0, NULL, cr,
422 NULL, NULL, NULL);
423 }
424
425 if (name != da->da_name)
426 kmem_free(name, MAXPATHLEN);
427
428
429 if (!error) {
430 va.va_mask = AT_ALL; /* we want everything */
431
432 error = rfs4_delegated_getattr(vp, &va, 0, cr);
433
434 /* check for overflows */
435 if (!error) {
436 acl_perm(vp, exi, &va, cr);
437 error = vattr_to_nattr(&va, &dr->dr_attr);
438 if (!error) {
439 if (sec.sec_flags & SEC_QUERY)
440 error = makefh_ol(&dr->dr_fhandle, exi,
441 sec.sec_index);
442 else {
443 error = makefh(&dr->dr_fhandle, vp,
444 exi);
445 if (!error && publicfh_flag &&
446 !chk_clnt_sec(exi, req))
447 auth_weak = TRUE;
448 }
449 }
450 }
451 VN_RELE(vp);
452 }
453
454 VN_RELE(dvp);
455
456 /*
457 * If publicfh_flag is true then we have called rfs_publicfh_mclookup
458 * and have obtained a new exportinfo in exi which needs to be
459 * released. Note the the original exportinfo pointed to by exi
460 * will be released by the caller, comon_dispatch.
461 */
462 if (publicfh_flag && exi != NULL)
463 exi_rele(exi);
464
465 /*
466 * If it's public fh, no 0x81, and client's flavor is
467 * invalid, set WebNFS status to WNFSERR_CLNT_FLAVOR now.
468 * Then set RPC status to AUTH_TOOWEAK in common_dispatch.
469 */
470 if (auth_weak)
471 dr->dr_status = (enum nfsstat)WNFSERR_CLNT_FLAVOR;
472 else
473 dr->dr_status = puterrno(error);
474 }
475 void *
476 rfs_lookup_getfh(struct nfsdiropargs *da)
477 {
478 return (da->da_fhandle);
479 }
480
481 /*
482 * Read symbolic link.
483 * Returns the string in the symbolic link at the given fhandle.
484 */
485 /* ARGSUSED */
486 void
487 rfs_readlink(fhandle_t *fhp, struct nfsrdlnres *rl, struct exportinfo *exi,
488 struct svc_req *req, cred_t *cr, bool_t ro)
489 {
490 int error;
491 struct iovec iov;
492 struct uio uio;
493 vnode_t *vp;
494 struct vattr va;
495 struct sockaddr *ca;
496 char *name = NULL;
497 int is_referral = 0;
498
499 vp = nfs_fhtovp(fhp, exi);
500 if (vp == NULL) {
501 rl->rl_data = NULL;
502 rl->rl_status = NFSERR_STALE;
503 return;
504 }
505
506 va.va_mask = AT_MODE;
507
508 error = VOP_GETATTR(vp, &va, 0, cr, NULL);
509
510 if (error) {
511 VN_RELE(vp);
512 rl->rl_data = NULL;
513 rl->rl_status = puterrno(error);
514 return;
515 }
516
517 if (MANDLOCK(vp, va.va_mode)) {
518 VN_RELE(vp);
519 rl->rl_data = NULL;
520 rl->rl_status = NFSERR_ACCES;
521 return;
522 }
523
524 /* We lied about the object type for a referral */
525 if (vn_is_nfs_reparse(vp, cr))
526 is_referral = 1;
527
528 /*
529 * XNFS and RFC1094 require us to return ENXIO if argument
530 * is not a link. BUGID 1138002.
531 */
532 if (vp->v_type != VLNK && !is_referral) {
533 VN_RELE(vp);
534 rl->rl_data = NULL;
535 rl->rl_status = NFSERR_NXIO;
536 return;
537 }
538
539 /*
540 * Allocate data for pathname. This will be freed by rfs_rlfree.
541 */
542 rl->rl_data = kmem_alloc(NFS_MAXPATHLEN, KM_SLEEP);
543
544 if (is_referral) {
545 char *s;
546 size_t strsz;
547
548 /* Get an artificial symlink based on a referral */
549 s = build_symlink(vp, cr, &strsz);
550 global_svstat_ptr[2][NFS_REFERLINKS].value.ui64++;
551 DTRACE_PROBE2(nfs2serv__func__referral__reflink,
552 vnode_t *, vp, char *, s);
553 if (s == NULL)
554 error = EINVAL;
555 else {
556 error = 0;
557 (void) strlcpy(rl->rl_data, s, NFS_MAXPATHLEN);
558 rl->rl_count = (uint32_t)MIN(strsz, NFS_MAXPATHLEN);
559 kmem_free(s, strsz);
560 }
561
562 } else {
563
564 /*
565 * Set up io vector to read sym link data
566 */
567 iov.iov_base = rl->rl_data;
568 iov.iov_len = NFS_MAXPATHLEN;
569 uio.uio_iov = &iov;
570 uio.uio_iovcnt = 1;
571 uio.uio_segflg = UIO_SYSSPACE;
572 uio.uio_extflg = UIO_COPY_CACHED;
573 uio.uio_loffset = (offset_t)0;
574 uio.uio_resid = NFS_MAXPATHLEN;
575
576 /*
577 * Do the readlink.
578 */
579 error = VOP_READLINK(vp, &uio, cr, NULL);
580
581 rl->rl_count = (uint32_t)(NFS_MAXPATHLEN - uio.uio_resid);
582
583 if (!error)
584 rl->rl_data[rl->rl_count] = '\0';
585
586 }
587
588
589 VN_RELE(vp);
590
591 ca = (struct sockaddr *)svc_getrpccaller(req->rq_xprt)->buf;
592 name = nfscmd_convname(ca, exi, rl->rl_data,
593 NFSCMD_CONV_OUTBOUND, MAXPATHLEN);
594
595 if (name != NULL && name != rl->rl_data) {
596 kmem_free(rl->rl_data, NFS_MAXPATHLEN);
597 rl->rl_data = name;
598 }
599
600 /*
601 * XNFS and RFC1094 require us to return ENXIO if argument
602 * is not a link. UFS returns EINVAL if this is the case,
603 * so we do the mapping here. BUGID 1138002.
604 */
605 if (error == EINVAL)
606 rl->rl_status = NFSERR_NXIO;
607 else
608 rl->rl_status = puterrno(error);
609
610 }
611 void *
612 rfs_readlink_getfh(fhandle_t *fhp)
613 {
614 return (fhp);
615 }
616 /*
617 * Free data allocated by rfs_readlink
618 */
619 void
620 rfs_rlfree(struct nfsrdlnres *rl)
621 {
622 if (rl->rl_data != NULL)
623 kmem_free(rl->rl_data, NFS_MAXPATHLEN);
624 }
625
626 static int rdma_setup_read_data2(struct nfsreadargs *, struct nfsrdresult *);
627
628 /*
629 * Read data.
630 * Returns some data read from the file at the given fhandle.
631 */
632 /* ARGSUSED */
633 void
634 rfs_read(struct nfsreadargs *ra, struct nfsrdresult *rr,
635 struct exportinfo *exi, struct svc_req *req, cred_t *cr, bool_t ro)
636 {
637 vnode_t *vp;
638 int error;
639 struct vattr va;
640 struct iovec iov;
641 struct uio uio;
642 mblk_t *mp;
643 int alloc_err = 0;
644 int in_crit = 0;
645 caller_context_t ct;
646
647 vp = nfs_fhtovp(&ra->ra_fhandle, exi);
648 if (vp == NULL) {
649 rr->rr_data = NULL;
650 rr->rr_status = NFSERR_STALE;
651 return;
652 }
653
654 if (vp->v_type != VREG) {
655 VN_RELE(vp);
656 rr->rr_data = NULL;
657 rr->rr_status = NFSERR_ISDIR;
658 return;
659 }
660
661 ct.cc_sysid = 0;
662 ct.cc_pid = 0;
663 ct.cc_caller_id = nfs2_srv_caller_id;
664 ct.cc_flags = CC_DONTBLOCK;
665
666 /*
667 * Enter the critical region before calling VOP_RWLOCK
668 * to avoid a deadlock with write requests.
669 */
670 if (nbl_need_check(vp)) {
671 nbl_start_crit(vp, RW_READER);
672 if (nbl_conflict(vp, NBL_READ, ra->ra_offset, ra->ra_count,
673 0, NULL)) {
674 nbl_end_crit(vp);
675 VN_RELE(vp);
676 rr->rr_data = NULL;
677 rr->rr_status = NFSERR_ACCES;
678 return;
679 }
680 in_crit = 1;
681 }
682
683 error = VOP_RWLOCK(vp, V_WRITELOCK_FALSE, &ct);
684
685 /* check if a monitor detected a delegation conflict */
686 if (error == EAGAIN && (ct.cc_flags & CC_WOULDBLOCK)) {
687 VN_RELE(vp);
688 /* mark as wouldblock so response is dropped */
689 curthread->t_flag |= T_WOULDBLOCK;
690
691 rr->rr_data = NULL;
692 return;
693 }
694
695 va.va_mask = AT_ALL;
696
697 error = VOP_GETATTR(vp, &va, 0, cr, &ct);
698
699 if (error) {
700 VOP_RWUNLOCK(vp, V_WRITELOCK_FALSE, &ct);
701 if (in_crit)
702 nbl_end_crit(vp);
703
704 VN_RELE(vp);
705 rr->rr_data = NULL;
706 rr->rr_status = puterrno(error);
707
708 return;
709 }
710
711 /*
712 * This is a kludge to allow reading of files created
713 * with no read permission. The owner of the file
714 * is always allowed to read it.
715 */
716 if (crgetuid(cr) != va.va_uid) {
717 error = VOP_ACCESS(vp, VREAD, 0, cr, &ct);
718
719 if (error) {
720 /*
721 * Exec is the same as read over the net because
722 * of demand loading.
723 */
724 error = VOP_ACCESS(vp, VEXEC, 0, cr, &ct);
725 }
726 if (error) {
727 VOP_RWUNLOCK(vp, V_WRITELOCK_FALSE, &ct);
728 if (in_crit)
729 nbl_end_crit(vp);
730 VN_RELE(vp);
731 rr->rr_data = NULL;
732 rr->rr_status = puterrno(error);
733
734 return;
735 }
736 }
737
738 if (MANDLOCK(vp, va.va_mode)) {
739 VOP_RWUNLOCK(vp, V_WRITELOCK_FALSE, &ct);
740 if (in_crit)
741 nbl_end_crit(vp);
742
743 VN_RELE(vp);
744 rr->rr_data = NULL;
745 rr->rr_status = NFSERR_ACCES;
746
747 return;
748 }
749
750 rr->rr_ok.rrok_wlist_len = 0;
751 rr->rr_ok.rrok_wlist = NULL;
752
753 if ((u_offset_t)ra->ra_offset >= va.va_size) {
754 rr->rr_count = 0;
755 rr->rr_data = NULL;
756 /*
757 * In this case, status is NFS_OK, but there is no data
758 * to encode. So set rr_mp to NULL.
759 */
760 rr->rr_mp = NULL;
761 rr->rr_ok.rrok_wlist = ra->ra_wlist;
762 if (rr->rr_ok.rrok_wlist)
763 clist_zero_len(rr->rr_ok.rrok_wlist);
764 goto done;
765 }
766
767 if (ra->ra_wlist) {
768 mp = NULL;
769 rr->rr_mp = NULL;
770 (void) rdma_get_wchunk(req, &iov, ra->ra_wlist);
771 if (ra->ra_count > iov.iov_len) {
772 rr->rr_data = NULL;
773 rr->rr_status = NFSERR_INVAL;
774 goto done;
775 }
776 } else {
777 /*
778 * mp will contain the data to be sent out in the read reply.
779 * This will be freed after the reply has been sent out (by the
780 * driver).
781 * Let's roundup the data to a BYTES_PER_XDR_UNIT multiple, so
782 * that the call to xdrmblk_putmblk() never fails.
783 */
784 mp = allocb_wait(RNDUP(ra->ra_count), BPRI_MED, STR_NOSIG,
785 &alloc_err);
786 ASSERT(mp != NULL);
787 ASSERT(alloc_err == 0);
788
789 rr->rr_mp = mp;
790
791 /*
792 * Set up io vector
793 */
794 iov.iov_base = (caddr_t)mp->b_datap->db_base;
795 iov.iov_len = ra->ra_count;
796 }
797
798 uio.uio_iov = &iov;
799 uio.uio_iovcnt = 1;
800 uio.uio_segflg = UIO_SYSSPACE;
801 uio.uio_extflg = UIO_COPY_CACHED;
802 uio.uio_loffset = (offset_t)ra->ra_offset;
803 uio.uio_resid = ra->ra_count;
804
805 error = VOP_READ(vp, &uio, 0, cr, &ct);
806
807 if (error) {
808 if (mp)
809 freeb(mp);
810
811 /*
812 * check if a monitor detected a delegation conflict and
813 * mark as wouldblock so response is dropped
814 */
815 if (error == EAGAIN && (ct.cc_flags & CC_WOULDBLOCK))
816 curthread->t_flag |= T_WOULDBLOCK;
817 else
818 rr->rr_status = puterrno(error);
819
820 VOP_RWUNLOCK(vp, V_WRITELOCK_FALSE, &ct);
821 if (in_crit)
822 nbl_end_crit(vp);
823
824 VN_RELE(vp);
825 rr->rr_data = NULL;
826
827 return;
828 }
829
830 /*
831 * Get attributes again so we can send the latest access
832 * time to the client side for his cache.
833 */
834 va.va_mask = AT_ALL;
835
836 error = VOP_GETATTR(vp, &va, 0, cr, &ct);
837
838 if (error) {
839 if (mp)
840 freeb(mp);
841
842 VOP_RWUNLOCK(vp, V_WRITELOCK_FALSE, &ct);
843 if (in_crit)
844 nbl_end_crit(vp);
845
846 VN_RELE(vp);
847 rr->rr_data = NULL;
848 rr->rr_status = puterrno(error);
849
850 return;
851 }
852
853 rr->rr_count = (uint32_t)(ra->ra_count - uio.uio_resid);
854
855 if (mp) {
856 rr->rr_data = (char *)mp->b_datap->db_base;
857 } else {
858 if (ra->ra_wlist) {
859 rr->rr_data = (caddr_t)iov.iov_base;
860 if (!rdma_setup_read_data2(ra, rr)) {
861 rr->rr_data = NULL;
862 rr->rr_status = puterrno(NFSERR_INVAL);
863 }
864 }
865 }
866 done:
867 VOP_RWUNLOCK(vp, V_WRITELOCK_FALSE, &ct);
868 if (in_crit)
869 nbl_end_crit(vp);
870
871 acl_perm(vp, exi, &va, cr);
872
873 /* check for overflows */
874 error = vattr_to_nattr(&va, &rr->rr_attr);
875
876 VN_RELE(vp);
877
878 rr->rr_status = puterrno(error);
879 }
880
881 /*
882 * Free data allocated by rfs_read
883 */
884 void
885 rfs_rdfree(struct nfsrdresult *rr)
886 {
887 mblk_t *mp;
888
889 if (rr->rr_status == NFS_OK) {
890 mp = rr->rr_mp;
891 if (mp != NULL)
892 freeb(mp);
893 }
894 }
895
896 void *
897 rfs_read_getfh(struct nfsreadargs *ra)
898 {
899 return (&ra->ra_fhandle);
900 }
901
902 #define MAX_IOVECS 12
903
904 #ifdef DEBUG
905 static int rfs_write_sync_hits = 0;
906 static int rfs_write_sync_misses = 0;
907 #endif
908
909 /*
910 * Write data to file.
911 * Returns attributes of a file after writing some data to it.
912 *
913 * Any changes made here, especially in error handling might have
914 * to also be done in rfs_write (which clusters write requests).
915 */
916 /* ARGSUSED */
917 void
918 rfs_write_sync(struct nfswriteargs *wa, struct nfsattrstat *ns,
919 struct exportinfo *exi, struct svc_req *req, cred_t *cr, bool_t ro)
920 {
921 int error;
922 vnode_t *vp;
923 rlim64_t rlimit;
924 struct vattr va;
925 struct uio uio;
926 struct iovec iov[MAX_IOVECS];
927 mblk_t *m;
928 struct iovec *iovp;
929 int iovcnt;
930 cred_t *savecred;
931 int in_crit = 0;
932 caller_context_t ct;
933
934 vp = nfs_fhtovp(&wa->wa_fhandle, exi);
935 if (vp == NULL) {
936 ns->ns_status = NFSERR_STALE;
937 return;
938 }
939
940 if (rdonly(ro, vp)) {
941 VN_RELE(vp);
942 ns->ns_status = NFSERR_ROFS;
943 return;
944 }
945
946 if (vp->v_type != VREG) {
947 VN_RELE(vp);
948 ns->ns_status = NFSERR_ISDIR;
949 return;
950 }
951
952 ct.cc_sysid = 0;
953 ct.cc_pid = 0;
954 ct.cc_caller_id = nfs2_srv_caller_id;
955 ct.cc_flags = CC_DONTBLOCK;
956
957 va.va_mask = AT_UID|AT_MODE;
958
959 error = VOP_GETATTR(vp, &va, 0, cr, &ct);
960
961 if (error) {
962 VN_RELE(vp);
963 ns->ns_status = puterrno(error);
964
965 return;
966 }
967
968 if (crgetuid(cr) != va.va_uid) {
969 /*
970 * This is a kludge to allow writes of files created
971 * with read only permission. The owner of the file
972 * is always allowed to write it.
973 */
974 error = VOP_ACCESS(vp, VWRITE, 0, cr, &ct);
975
976 if (error) {
977 VN_RELE(vp);
978 ns->ns_status = puterrno(error);
979 return;
980 }
981 }
982
983 /*
984 * Can't access a mandatory lock file. This might cause
985 * the NFS service thread to block forever waiting for a
986 * lock to be released that will never be released.
987 */
988 if (MANDLOCK(vp, va.va_mode)) {
989 VN_RELE(vp);
990 ns->ns_status = NFSERR_ACCES;
991 return;
992 }
993
994 /*
995 * We have to enter the critical region before calling VOP_RWLOCK
996 * to avoid a deadlock with ufs.
997 */
998 if (nbl_need_check(vp)) {
999 nbl_start_crit(vp, RW_READER);
1000 in_crit = 1;
1001 if (nbl_conflict(vp, NBL_WRITE, wa->wa_offset,
1002 wa->wa_count, 0, NULL)) {
1003 error = EACCES;
1004 goto out;
1005 }
1006 }
1007
1008 error = VOP_RWLOCK(vp, V_WRITELOCK_TRUE, &ct);
1009
1010 /* check if a monitor detected a delegation conflict */
1011 if (error == EAGAIN && (ct.cc_flags & CC_WOULDBLOCK)) {
1012 VN_RELE(vp);
1013 /* mark as wouldblock so response is dropped */
1014 curthread->t_flag |= T_WOULDBLOCK;
1015 return;
1016 }
1017
1018 if (wa->wa_data || wa->wa_rlist) {
1019 /* Do the RDMA thing if necessary */
1020 if (wa->wa_rlist) {
1021 iov[0].iov_base = (char *)((wa->wa_rlist)->u.c_daddr3);
1022 iov[0].iov_len = wa->wa_count;
1023 } else {
1024 iov[0].iov_base = wa->wa_data;
1025 iov[0].iov_len = wa->wa_count;
1026 }
1027 uio.uio_iov = iov;
1028 uio.uio_iovcnt = 1;
1029 uio.uio_segflg = UIO_SYSSPACE;
1030 uio.uio_extflg = UIO_COPY_DEFAULT;
1031 uio.uio_loffset = (offset_t)wa->wa_offset;
1032 uio.uio_resid = wa->wa_count;
1033 /*
1034 * The limit is checked on the client. We
1035 * should allow any size writes here.
1036 */
1037 uio.uio_llimit = curproc->p_fsz_ctl;
1038 rlimit = uio.uio_llimit - wa->wa_offset;
1039 if (rlimit < (rlim64_t)uio.uio_resid)
1040 uio.uio_resid = (uint_t)rlimit;
1041
1042 /*
1043 * for now we assume no append mode
1044 */
1045 /*
1046 * We're changing creds because VM may fault and we need
1047 * the cred of the current thread to be used if quota
1048 * checking is enabled.
1049 */
1050 savecred = curthread->t_cred;
1051 curthread->t_cred = cr;
1052 error = VOP_WRITE(vp, &uio, FSYNC, cr, &ct);
1053 curthread->t_cred = savecred;
1054 } else {
1055 iovcnt = 0;
1056 for (m = wa->wa_mblk; m != NULL; m = m->b_cont)
1057 iovcnt++;
1058 if (iovcnt <= MAX_IOVECS) {
1059 #ifdef DEBUG
1060 rfs_write_sync_hits++;
1061 #endif
1062 iovp = iov;
1063 } else {
1064 #ifdef DEBUG
1065 rfs_write_sync_misses++;
1066 #endif
1067 iovp = kmem_alloc(sizeof (*iovp) * iovcnt, KM_SLEEP);
1068 }
1069 mblk_to_iov(wa->wa_mblk, iovcnt, iovp);
1070 uio.uio_iov = iovp;
1071 uio.uio_iovcnt = iovcnt;
1072 uio.uio_segflg = UIO_SYSSPACE;
1073 uio.uio_extflg = UIO_COPY_DEFAULT;
1074 uio.uio_loffset = (offset_t)wa->wa_offset;
1075 uio.uio_resid = wa->wa_count;
1076 /*
1077 * The limit is checked on the client. We
1078 * should allow any size writes here.
1079 */
1080 uio.uio_llimit = curproc->p_fsz_ctl;
1081 rlimit = uio.uio_llimit - wa->wa_offset;
1082 if (rlimit < (rlim64_t)uio.uio_resid)
1083 uio.uio_resid = (uint_t)rlimit;
1084
1085 /*
1086 * For now we assume no append mode.
1087 */
1088 /*
1089 * We're changing creds because VM may fault and we need
1090 * the cred of the current thread to be used if quota
1091 * checking is enabled.
1092 */
1093 savecred = curthread->t_cred;
1094 curthread->t_cred = cr;
1095 error = VOP_WRITE(vp, &uio, FSYNC, cr, &ct);
1096 curthread->t_cred = savecred;
1097
1098 if (iovp != iov)
1099 kmem_free(iovp, sizeof (*iovp) * iovcnt);
1100 }
1101
1102 VOP_RWUNLOCK(vp, V_WRITELOCK_TRUE, &ct);
1103
1104 if (!error) {
1105 /*
1106 * Get attributes again so we send the latest mod
1107 * time to the client side for his cache.
1108 */
1109 va.va_mask = AT_ALL; /* now we want everything */
1110
1111 error = VOP_GETATTR(vp, &va, 0, cr, &ct);
1112
1113 /* check for overflows */
1114 if (!error) {
1115 acl_perm(vp, exi, &va, cr);
1116 error = vattr_to_nattr(&va, &ns->ns_attr);
1117 }
1118 }
1119
1120 out:
1121 if (in_crit)
1122 nbl_end_crit(vp);
1123 VN_RELE(vp);
1124
1125 /* check if a monitor detected a delegation conflict */
1126 if (error == EAGAIN && (ct.cc_flags & CC_WOULDBLOCK))
1127 /* mark as wouldblock so response is dropped */
1128 curthread->t_flag |= T_WOULDBLOCK;
1129 else
1130 ns->ns_status = puterrno(error);
1131
1132 }
1133
1134 struct rfs_async_write {
1135 struct nfswriteargs *wa;
1136 struct nfsattrstat *ns;
1137 struct svc_req *req;
1138 cred_t *cr;
1139 bool_t ro;
1140 kthread_t *thread;
1141 struct rfs_async_write *list;
1142 };
1143
1144 struct rfs_async_write_list {
1145 fhandle_t *fhp;
1146 kcondvar_t cv;
1147 struct rfs_async_write *list;
1148 struct rfs_async_write_list *next;
1149 };
1150
1151 static struct rfs_async_write_list *rfs_async_write_head = NULL;
1152 static kmutex_t rfs_async_write_lock;
1153 static int rfs_write_async = 1; /* enables write clustering if == 1 */
1154
1155 #define MAXCLIOVECS 42
1156 #define RFSWRITE_INITVAL (enum nfsstat) -1
1157
1158 #ifdef DEBUG
1159 static int rfs_write_hits = 0;
1160 static int rfs_write_misses = 0;
1161 #endif
1162
1163 /*
1164 * Write data to file.
1165 * Returns attributes of a file after writing some data to it.
1166 */
1167 void
1168 rfs_write(struct nfswriteargs *wa, struct nfsattrstat *ns,
1169 struct exportinfo *exi, struct svc_req *req, cred_t *cr, bool_t ro)
1170 {
1171 int error;
1172 vnode_t *vp;
1173 rlim64_t rlimit;
1174 struct vattr va;
1175 struct uio uio;
1176 struct rfs_async_write_list *lp;
1177 struct rfs_async_write_list *nlp;
1178 struct rfs_async_write *rp;
1179 struct rfs_async_write *nrp;
1180 struct rfs_async_write *trp;
1181 struct rfs_async_write *lrp;
1182 int data_written;
1183 int iovcnt;
1184 mblk_t *m;
1185 struct iovec *iovp;
1186 struct iovec *niovp;
1187 struct iovec iov[MAXCLIOVECS];
1188 int count;
1189 int rcount;
1190 uint_t off;
1191 uint_t len;
1192 struct rfs_async_write nrpsp;
1193 struct rfs_async_write_list nlpsp;
1194 ushort_t t_flag;
1195 cred_t *savecred;
1196 int in_crit = 0;
1197 caller_context_t ct;
1198
1199 if (!rfs_write_async) {
1200 rfs_write_sync(wa, ns, exi, req, cr, ro);
1201 return;
1202 }
1203
1204 /*
1205 * Initialize status to RFSWRITE_INITVAL instead of 0, since value of 0
1206 * is considered an OK.
1207 */
1208 ns->ns_status = RFSWRITE_INITVAL;
1209
1210 nrp = &nrpsp;
1211 nrp->wa = wa;
1212 nrp->ns = ns;
1213 nrp->req = req;
1214 nrp->cr = cr;
1215 nrp->ro = ro;
1216 nrp->thread = curthread;
1217
1218 ASSERT(curthread->t_schedflag & TS_DONT_SWAP);
1219
1220 /*
1221 * Look to see if there is already a cluster started
1222 * for this file.
1223 */
1224 mutex_enter(&rfs_async_write_lock);
1225 for (lp = rfs_async_write_head; lp != NULL; lp = lp->next) {
1226 if (bcmp(&wa->wa_fhandle, lp->fhp,
1227 sizeof (fhandle_t)) == 0)
1228 break;
1229 }
1230
1231 /*
1232 * If lp is non-NULL, then there is already a cluster
1233 * started. We need to place ourselves in the cluster
1234 * list in the right place as determined by starting
1235 * offset. Conflicts with non-blocking mandatory locked
1236 * regions will be checked when the cluster is processed.
1237 */
1238 if (lp != NULL) {
1239 rp = lp->list;
1240 trp = NULL;
1241 while (rp != NULL && rp->wa->wa_offset < wa->wa_offset) {
1242 trp = rp;
1243 rp = rp->list;
1244 }
1245 nrp->list = rp;
1246 if (trp == NULL)
1247 lp->list = nrp;
1248 else
1249 trp->list = nrp;
1250 while (nrp->ns->ns_status == RFSWRITE_INITVAL)
1251 cv_wait(&lp->cv, &rfs_async_write_lock);
1252 mutex_exit(&rfs_async_write_lock);
1253
1254 return;
1255 }
1256
1257 /*
1258 * No cluster started yet, start one and add ourselves
1259 * to the list of clusters.
1260 */
1261 nrp->list = NULL;
1262
1263 nlp = &nlpsp;
1264 nlp->fhp = &wa->wa_fhandle;
1265 cv_init(&nlp->cv, NULL, CV_DEFAULT, NULL);
1266 nlp->list = nrp;
1267 nlp->next = NULL;
1268
1269 if (rfs_async_write_head == NULL) {
1270 rfs_async_write_head = nlp;
1271 } else {
1272 lp = rfs_async_write_head;
1273 while (lp->next != NULL)
1274 lp = lp->next;
1275 lp->next = nlp;
1276 }
1277 mutex_exit(&rfs_async_write_lock);
1278
1279 /*
1280 * Convert the file handle common to all of the requests
1281 * in this cluster to a vnode.
1282 */
1283 vp = nfs_fhtovp(&wa->wa_fhandle, exi);
1284 if (vp == NULL) {
1285 mutex_enter(&rfs_async_write_lock);
1286 if (rfs_async_write_head == nlp)
1287 rfs_async_write_head = nlp->next;
1288 else {
1289 lp = rfs_async_write_head;
1290 while (lp->next != nlp)
1291 lp = lp->next;
1292 lp->next = nlp->next;
1293 }
1294 t_flag = curthread->t_flag & T_WOULDBLOCK;
1295 for (rp = nlp->list; rp != NULL; rp = rp->list) {
1296 rp->ns->ns_status = NFSERR_STALE;
1297 rp->thread->t_flag |= t_flag;
1298 }
1299 cv_broadcast(&nlp->cv);
1300 mutex_exit(&rfs_async_write_lock);
1301
1302 return;
1303 }
1304
1305 /*
1306 * Can only write regular files. Attempts to write any
1307 * other file types fail with EISDIR.
1308 */
1309 if (vp->v_type != VREG) {
1310 VN_RELE(vp);
1311 mutex_enter(&rfs_async_write_lock);
1312 if (rfs_async_write_head == nlp)
1313 rfs_async_write_head = nlp->next;
1314 else {
1315 lp = rfs_async_write_head;
1316 while (lp->next != nlp)
1317 lp = lp->next;
1318 lp->next = nlp->next;
1319 }
1320 t_flag = curthread->t_flag & T_WOULDBLOCK;
1321 for (rp = nlp->list; rp != NULL; rp = rp->list) {
1322 rp->ns->ns_status = NFSERR_ISDIR;
1323 rp->thread->t_flag |= t_flag;
1324 }
1325 cv_broadcast(&nlp->cv);
1326 mutex_exit(&rfs_async_write_lock);
1327
1328 return;
1329 }
1330
1331 /*
1332 * Enter the critical region before calling VOP_RWLOCK, to avoid a
1333 * deadlock with ufs.
1334 */
1335 if (nbl_need_check(vp)) {
1336 nbl_start_crit(vp, RW_READER);
1337 in_crit = 1;
1338 }
1339
1340 ct.cc_sysid = 0;
1341 ct.cc_pid = 0;
1342 ct.cc_caller_id = nfs2_srv_caller_id;
1343 ct.cc_flags = CC_DONTBLOCK;
1344
1345 /*
1346 * Lock the file for writing. This operation provides
1347 * the delay which allows clusters to grow.
1348 */
1349 error = VOP_RWLOCK(vp, V_WRITELOCK_TRUE, &ct);
1350
1351 /* check if a monitor detected a delegation conflict */
1352 if (error == EAGAIN && (ct.cc_flags & CC_WOULDBLOCK)) {
1353 if (in_crit)
1354 nbl_end_crit(vp);
1355 VN_RELE(vp);
1356 /* mark as wouldblock so response is dropped */
1357 curthread->t_flag |= T_WOULDBLOCK;
1358 mutex_enter(&rfs_async_write_lock);
1359 if (rfs_async_write_head == nlp)
1360 rfs_async_write_head = nlp->next;
1361 else {
1362 lp = rfs_async_write_head;
1363 while (lp->next != nlp)
1364 lp = lp->next;
1365 lp->next = nlp->next;
1366 }
1367 for (rp = nlp->list; rp != NULL; rp = rp->list) {
1368 if (rp->ns->ns_status == RFSWRITE_INITVAL) {
1369 rp->ns->ns_status = puterrno(error);
1370 rp->thread->t_flag |= T_WOULDBLOCK;
1371 }
1372 }
1373 cv_broadcast(&nlp->cv);
1374 mutex_exit(&rfs_async_write_lock);
1375
1376 return;
1377 }
1378
1379 /*
1380 * Disconnect this cluster from the list of clusters.
1381 * The cluster that is being dealt with must be fixed
1382 * in size after this point, so there is no reason
1383 * to leave it on the list so that new requests can
1384 * find it.
1385 *
1386 * The algorithm is that the first write request will
1387 * create a cluster, convert the file handle to a
1388 * vnode pointer, and then lock the file for writing.
1389 * This request is not likely to be clustered with
1390 * any others. However, the next request will create
1391 * a new cluster and be blocked in VOP_RWLOCK while
1392 * the first request is being processed. This delay
1393 * will allow more requests to be clustered in this
1394 * second cluster.
1395 */
1396 mutex_enter(&rfs_async_write_lock);
1397 if (rfs_async_write_head == nlp)
1398 rfs_async_write_head = nlp->next;
1399 else {
1400 lp = rfs_async_write_head;
1401 while (lp->next != nlp)
1402 lp = lp->next;
1403 lp->next = nlp->next;
1404 }
1405 mutex_exit(&rfs_async_write_lock);
1406
1407 /*
1408 * Step through the list of requests in this cluster.
1409 * We need to check permissions to make sure that all
1410 * of the requests have sufficient permission to write
1411 * the file. A cluster can be composed of requests
1412 * from different clients and different users on each
1413 * client.
1414 *
1415 * As a side effect, we also calculate the size of the
1416 * byte range that this cluster encompasses.
1417 */
1418 rp = nlp->list;
1419 off = rp->wa->wa_offset;
1420 len = (uint_t)0;
1421 do {
1422 if (rdonly(rp->ro, vp)) {
1423 rp->ns->ns_status = NFSERR_ROFS;
1424 t_flag = curthread->t_flag & T_WOULDBLOCK;
1425 rp->thread->t_flag |= t_flag;
1426 continue;
1427 }
1428
1429 va.va_mask = AT_UID|AT_MODE;
1430
1431 error = VOP_GETATTR(vp, &va, 0, rp->cr, &ct);
1432
1433 if (!error) {
1434 if (crgetuid(rp->cr) != va.va_uid) {
1435 /*
1436 * This is a kludge to allow writes of files
1437 * created with read only permission. The
1438 * owner of the file is always allowed to
1439 * write it.
1440 */
1441 error = VOP_ACCESS(vp, VWRITE, 0, rp->cr, &ct);
1442 }
1443 if (!error && MANDLOCK(vp, va.va_mode))
1444 error = EACCES;
1445 }
1446
1447 /*
1448 * Check for a conflict with a nbmand-locked region.
1449 */
1450 if (in_crit && nbl_conflict(vp, NBL_WRITE, rp->wa->wa_offset,
1451 rp->wa->wa_count, 0, NULL)) {
1452 error = EACCES;
1453 }
1454
1455 if (error) {
1456 rp->ns->ns_status = puterrno(error);
1457 t_flag = curthread->t_flag & T_WOULDBLOCK;
1458 rp->thread->t_flag |= t_flag;
1459 continue;
1460 }
1461 if (len < rp->wa->wa_offset + rp->wa->wa_count - off)
1462 len = rp->wa->wa_offset + rp->wa->wa_count - off;
1463 } while ((rp = rp->list) != NULL);
1464
1465 /*
1466 * Step through the cluster attempting to gather as many
1467 * requests which are contiguous as possible. These
1468 * contiguous requests are handled via one call to VOP_WRITE
1469 * instead of different calls to VOP_WRITE. We also keep
1470 * track of the fact that any data was written.
1471 */
1472 rp = nlp->list;
1473 data_written = 0;
1474 do {
1475 /*
1476 * Skip any requests which are already marked as having an
1477 * error.
1478 */
1479 if (rp->ns->ns_status != RFSWRITE_INITVAL) {
1480 rp = rp->list;
1481 continue;
1482 }
1483
1484 /*
1485 * Count the number of iovec's which are required
1486 * to handle this set of requests. One iovec is
1487 * needed for each data buffer, whether addressed
1488 * by wa_data or by the b_rptr pointers in the
1489 * mblk chains.
1490 */
1491 iovcnt = 0;
1492 lrp = rp;
1493 for (;;) {
1494 if (lrp->wa->wa_data || lrp->wa->wa_rlist)
1495 iovcnt++;
1496 else {
1497 m = lrp->wa->wa_mblk;
1498 while (m != NULL) {
1499 iovcnt++;
1500 m = m->b_cont;
1501 }
1502 }
1503 if (lrp->list == NULL ||
1504 lrp->list->ns->ns_status != RFSWRITE_INITVAL ||
1505 lrp->wa->wa_offset + lrp->wa->wa_count !=
1506 lrp->list->wa->wa_offset) {
1507 lrp = lrp->list;
1508 break;
1509 }
1510 lrp = lrp->list;
1511 }
1512
1513 if (iovcnt <= MAXCLIOVECS) {
1514 #ifdef DEBUG
1515 rfs_write_hits++;
1516 #endif
1517 niovp = iov;
1518 } else {
1519 #ifdef DEBUG
1520 rfs_write_misses++;
1521 #endif
1522 niovp = kmem_alloc(sizeof (*niovp) * iovcnt, KM_SLEEP);
1523 }
1524 /*
1525 * Put together the scatter/gather iovecs.
1526 */
1527 iovp = niovp;
1528 trp = rp;
1529 count = 0;
1530 do {
1531 if (trp->wa->wa_data || trp->wa->wa_rlist) {
1532 if (trp->wa->wa_rlist) {
1533 iovp->iov_base =
1534 (char *)((trp->wa->wa_rlist)->
1535 u.c_daddr3);
1536 iovp->iov_len = trp->wa->wa_count;
1537 } else {
1538 iovp->iov_base = trp->wa->wa_data;
1539 iovp->iov_len = trp->wa->wa_count;
1540 }
1541 iovp++;
1542 } else {
1543 m = trp->wa->wa_mblk;
1544 rcount = trp->wa->wa_count;
1545 while (m != NULL) {
1546 iovp->iov_base = (caddr_t)m->b_rptr;
1547 iovp->iov_len = (m->b_wptr - m->b_rptr);
1548 rcount -= iovp->iov_len;
1549 if (rcount < 0)
1550 iovp->iov_len += rcount;
1551 iovp++;
1552 if (rcount <= 0)
1553 break;
1554 m = m->b_cont;
1555 }
1556 }
1557 count += trp->wa->wa_count;
1558 trp = trp->list;
1559 } while (trp != lrp);
1560
1561 uio.uio_iov = niovp;
1562 uio.uio_iovcnt = iovcnt;
1563 uio.uio_segflg = UIO_SYSSPACE;
1564 uio.uio_extflg = UIO_COPY_DEFAULT;
1565 uio.uio_loffset = (offset_t)rp->wa->wa_offset;
1566 uio.uio_resid = count;
1567 /*
1568 * The limit is checked on the client. We
1569 * should allow any size writes here.
1570 */
1571 uio.uio_llimit = curproc->p_fsz_ctl;
1572 rlimit = uio.uio_llimit - rp->wa->wa_offset;
1573 if (rlimit < (rlim64_t)uio.uio_resid)
1574 uio.uio_resid = (uint_t)rlimit;
1575
1576 /*
1577 * For now we assume no append mode.
1578 */
1579
1580 /*
1581 * We're changing creds because VM may fault
1582 * and we need the cred of the current
1583 * thread to be used if quota * checking is
1584 * enabled.
1585 */
1586 savecred = curthread->t_cred;
1587 curthread->t_cred = cr;
1588 error = VOP_WRITE(vp, &uio, 0, rp->cr, &ct);
1589 curthread->t_cred = savecred;
1590
1591 /* check if a monitor detected a delegation conflict */
1592 if (error == EAGAIN && (ct.cc_flags & CC_WOULDBLOCK))
1593 /* mark as wouldblock so response is dropped */
1594 curthread->t_flag |= T_WOULDBLOCK;
1595
1596 if (niovp != iov)
1597 kmem_free(niovp, sizeof (*niovp) * iovcnt);
1598
1599 if (!error) {
1600 data_written = 1;
1601 /*
1602 * Get attributes again so we send the latest mod
1603 * time to the client side for his cache.
1604 */
1605 va.va_mask = AT_ALL; /* now we want everything */
1606
1607 error = VOP_GETATTR(vp, &va, 0, rp->cr, &ct);
1608
1609 if (!error)
1610 acl_perm(vp, exi, &va, rp->cr);
1611 }
1612
1613 /*
1614 * Fill in the status responses for each request
1615 * which was just handled. Also, copy the latest
1616 * attributes in to the attribute responses if
1617 * appropriate.
1618 */
1619 t_flag = curthread->t_flag & T_WOULDBLOCK;
1620 do {
1621 rp->thread->t_flag |= t_flag;
1622 /* check for overflows */
1623 if (!error) {
1624 error = vattr_to_nattr(&va, &rp->ns->ns_attr);
1625 }
1626 rp->ns->ns_status = puterrno(error);
1627 rp = rp->list;
1628 } while (rp != lrp);
1629 } while (rp != NULL);
1630
1631 /*
1632 * If any data was written at all, then we need to flush
1633 * the data and metadata to stable storage.
1634 */
1635 if (data_written) {
1636 error = VOP_PUTPAGE(vp, (u_offset_t)off, len, 0, cr, &ct);
1637
1638 if (!error) {
1639 error = VOP_FSYNC(vp, FNODSYNC, cr, &ct);
1640 }
1641 }
1642
1643 VOP_RWUNLOCK(vp, V_WRITELOCK_TRUE, &ct);
1644
1645 if (in_crit)
1646 nbl_end_crit(vp);
1647 VN_RELE(vp);
1648
1649 t_flag = curthread->t_flag & T_WOULDBLOCK;
1650 mutex_enter(&rfs_async_write_lock);
1651 for (rp = nlp->list; rp != NULL; rp = rp->list) {
1652 if (rp->ns->ns_status == RFSWRITE_INITVAL) {
1653 rp->ns->ns_status = puterrno(error);
1654 rp->thread->t_flag |= t_flag;
1655 }
1656 }
1657 cv_broadcast(&nlp->cv);
1658 mutex_exit(&rfs_async_write_lock);
1659
1660 }
1661
1662 void *
1663 rfs_write_getfh(struct nfswriteargs *wa)
1664 {
1665 return (&wa->wa_fhandle);
1666 }
1667
1668 /*
1669 * Create a file.
1670 * Creates a file with given attributes and returns those attributes
1671 * and an fhandle for the new file.
1672 */
1673 void
1674 rfs_create(struct nfscreatargs *args, struct nfsdiropres *dr,
1675 struct exportinfo *exi, struct svc_req *req, cred_t *cr, bool_t ro)
1676 {
1677 int error;
1678 int lookuperr;
1679 int in_crit = 0;
1680 struct vattr va;
1681 vnode_t *vp;
1682 vnode_t *realvp;
1683 vnode_t *dvp;
1684 char *name = args->ca_da.da_name;
1685 vnode_t *tvp = NULL;
1686 int mode;
1687 int lookup_ok;
1688 bool_t trunc;
1689 struct sockaddr *ca;
1690
1691 /*
1692 * Disallow NULL paths
1693 */
1694 if (name == NULL || *name == '\0') {
1695 dr->dr_status = NFSERR_ACCES;
1696 return;
1697 }
1698
1699 dvp = nfs_fhtovp(args->ca_da.da_fhandle, exi);
1700 if (dvp == NULL) {
1701 dr->dr_status = NFSERR_STALE;
1702 return;
1703 }
1704
1705 error = sattr_to_vattr(args->ca_sa, &va);
1706 if (error) {
1707 dr->dr_status = puterrno(error);
1708 return;
1709 }
1710
1711 /*
1712 * Must specify the mode.
1713 */
1714 if (!(va.va_mask & AT_MODE)) {
1715 VN_RELE(dvp);
1716 dr->dr_status = NFSERR_INVAL;
1717 return;
1718 }
1719
1720 /*
1721 * This is a completely gross hack to make mknod
1722 * work over the wire until we can wack the protocol
1723 */
1724 if ((va.va_mode & IFMT) == IFCHR) {
1725 if (args->ca_sa->sa_size == (uint_t)NFS_FIFO_DEV)
1726 va.va_type = VFIFO; /* xtra kludge for named pipe */
1727 else {
1728 va.va_type = VCHR;
1729 /*
1730 * uncompress the received dev_t
1731 * if the top half is zero indicating a request
1732 * from an `older style' OS.
1733 */
1734 if ((va.va_size & 0xffff0000) == 0)
1735 va.va_rdev = nfsv2_expdev(va.va_size);
1736 else
1737 va.va_rdev = (dev_t)va.va_size;
1738 }
1739 va.va_mask &= ~AT_SIZE;
1740 } else if ((va.va_mode & IFMT) == IFBLK) {
1741 va.va_type = VBLK;
1742 /*
1743 * uncompress the received dev_t
1744 * if the top half is zero indicating a request
1745 * from an `older style' OS.
1746 */
1747 if ((va.va_size & 0xffff0000) == 0)
1748 va.va_rdev = nfsv2_expdev(va.va_size);
1749 else
1750 va.va_rdev = (dev_t)va.va_size;
1751 va.va_mask &= ~AT_SIZE;
1752 } else if ((va.va_mode & IFMT) == IFSOCK) {
1753 va.va_type = VSOCK;
1754 } else {
1755 va.va_type = VREG;
1756 }
1757 va.va_mode &= ~IFMT;
1758 va.va_mask |= AT_TYPE;
1759
1760 ca = (struct sockaddr *)svc_getrpccaller(req->rq_xprt)->buf;
1761 name = nfscmd_convname(ca, exi, name, NFSCMD_CONV_INBOUND,
1762 MAXPATHLEN);
1763 if (name == NULL) {
1764 dr->dr_status = puterrno(EINVAL);
1765 return;
1766 }
1767
1768 /*
1769 * Why was the choice made to use VWRITE as the mode to the
1770 * call to VOP_CREATE ? This results in a bug. When a client
1771 * opens a file that already exists and is RDONLY, the second
1772 * open fails with an EACESS because of the mode.
1773 * bug ID 1054648.
1774 */
1775 lookup_ok = 0;
1776 mode = VWRITE;
1777 if (!(va.va_mask & AT_SIZE) || va.va_type != VREG) {
1778 error = VOP_LOOKUP(dvp, name, &tvp, NULL, 0, NULL, cr,
1779 NULL, NULL, NULL);
1780 if (!error) {
1781 struct vattr at;
1782
1783 lookup_ok = 1;
1784 at.va_mask = AT_MODE;
1785 error = VOP_GETATTR(tvp, &at, 0, cr, NULL);
1786 if (!error)
1787 mode = (at.va_mode & S_IWUSR) ? VWRITE : VREAD;
1788 VN_RELE(tvp);
1789 tvp = NULL;
1790 }
1791 }
1792
1793 if (!lookup_ok) {
1794 if (rdonly(ro, dvp)) {
1795 error = EROFS;
1796 } else if (va.va_type != VREG && va.va_type != VFIFO &&
1797 va.va_type != VSOCK && secpolicy_sys_devices(cr) != 0) {
1798 error = EPERM;
1799 } else {
1800 error = 0;
1801 }
1802 }
1803
1804 /*
1805 * If file size is being modified on an already existing file
1806 * make sure that there are no conflicting non-blocking mandatory
1807 * locks in the region being manipulated. Return EACCES if there
1808 * are conflicting locks.
1809 */
1810 if (!error && (va.va_type == VREG) && (va.va_mask & AT_SIZE)) {
1811 lookuperr = VOP_LOOKUP(dvp, name, &tvp, NULL, 0, NULL, cr,
1812 NULL, NULL, NULL);
1813
1814 if (!lookuperr &&
1815 rfs4_check_delegated(FWRITE, tvp, va.va_size == 0)) {
1816 VN_RELE(tvp);
1817 curthread->t_flag |= T_WOULDBLOCK;
1818 goto out;
1819 }
1820
1821 if (!lookuperr && nbl_need_check(tvp)) {
1822 /*
1823 * The file exists. Now check if it has any
1824 * conflicting non-blocking mandatory locks
1825 * in the region being changed.
1826 */
1827 struct vattr bva;
1828 u_offset_t offset;
1829 ssize_t length;
1830
1831 nbl_start_crit(tvp, RW_READER);
1832 in_crit = 1;
1833
1834 bva.va_mask = AT_SIZE;
1835 error = VOP_GETATTR(tvp, &bva, 0, cr, NULL);
1836 if (!error) {
1837 if (va.va_size < bva.va_size) {
1838 offset = va.va_size;
1839 length = bva.va_size - va.va_size;
1840 } else {
1841 offset = bva.va_size;
1842 length = va.va_size - bva.va_size;
1843 }
1844 if (length) {
1845 if (nbl_conflict(tvp, NBL_WRITE,
1846 offset, length, 0, NULL)) {
1847 error = EACCES;
1848 }
1849 }
1850 }
1851 if (error) {
1852 nbl_end_crit(tvp);
1853 VN_RELE(tvp);
1854 in_crit = 0;
1855 }
1856 } else if (tvp != NULL) {
1857 VN_RELE(tvp);
1858 }
1859 }
1860
1861 if (!error) {
1862 /*
1863 * If filesystem is shared with nosuid the remove any
1864 * setuid/setgid bits on create.
1865 */
1866 if (va.va_type == VREG &&
1867 exi->exi_export.ex_flags & EX_NOSUID)
1868 va.va_mode &= ~(VSUID | VSGID);
1869
1870 error = VOP_CREATE(dvp, name, &va, NONEXCL, mode, &vp, cr, 0,
1871 NULL, NULL);
1872
1873 if (!error) {
1874
1875 if ((va.va_mask & AT_SIZE) && (va.va_size == 0))
1876 trunc = TRUE;
1877 else
1878 trunc = FALSE;
1879
1880 if (rfs4_check_delegated(FWRITE, vp, trunc)) {
1881 VN_RELE(vp);
1882 curthread->t_flag |= T_WOULDBLOCK;
1883 goto out;
1884 }
1885 va.va_mask = AT_ALL;
1886
1887 error = VOP_GETATTR(vp, &va, 0, cr, NULL);
1888
1889 /* check for overflows */
1890 if (!error) {
1891 acl_perm(vp, exi, &va, cr);
1892 error = vattr_to_nattr(&va, &dr->dr_attr);
1893 if (!error) {
1894 error = makefh(&dr->dr_fhandle, vp,
1895 exi);
1896 }
1897 }
1898 /*
1899 * Force modified metadata out to stable storage.
1900 *
1901 * if a underlying vp exists, pass it to VOP_FSYNC
1902 */
1903 if (VOP_REALVP(vp, &realvp, NULL) == 0)
1904 (void) VOP_FSYNC(realvp, FNODSYNC, cr, NULL);
1905 else
1906 (void) VOP_FSYNC(vp, FNODSYNC, cr, NULL);
1907 VN_RELE(vp);
1908 }
1909
1910 if (in_crit) {
1911 nbl_end_crit(tvp);
1912 VN_RELE(tvp);
1913 }
1914 }
1915
1916 /*
1917 * Force modified data and metadata out to stable storage.
1918 */
1919 (void) VOP_FSYNC(dvp, 0, cr, NULL);
1920
1921 out:
1922
1923 VN_RELE(dvp);
1924
1925 dr->dr_status = puterrno(error);
1926
1927 if (name != args->ca_da.da_name)
1928 kmem_free(name, MAXPATHLEN);
1929 }
1930 void *
1931 rfs_create_getfh(struct nfscreatargs *args)
1932 {
1933 return (args->ca_da.da_fhandle);
1934 }
1935
1936 /*
1937 * Remove a file.
1938 * Remove named file from parent directory.
1939 */
1940 /* ARGSUSED */
1941 void
1942 rfs_remove(struct nfsdiropargs *da, enum nfsstat *status,
1943 struct exportinfo *exi, struct svc_req *req, cred_t *cr, bool_t ro)
1944 {
1945 int error = 0;
1946 vnode_t *vp;
1947 vnode_t *targvp;
1948 int in_crit = 0;
1949
1950 /*
1951 * Disallow NULL paths
1952 */
1953 if (da->da_name == NULL || *da->da_name == '\0') {
1954 *status = NFSERR_ACCES;
1955 return;
1956 }
1957
1958 vp = nfs_fhtovp(da->da_fhandle, exi);
1959 if (vp == NULL) {
1960 *status = NFSERR_STALE;
1961 return;
1962 }
1963
1964 if (rdonly(ro, vp)) {
1965 VN_RELE(vp);
1966 *status = NFSERR_ROFS;
1967 return;
1968 }
1969
1970 /*
1971 * Check for a conflict with a non-blocking mandatory share reservation.
1972 */
1973 error = VOP_LOOKUP(vp, da->da_name, &targvp, NULL, 0,
1974 NULL, cr, NULL, NULL, NULL);
1975 if (error != 0) {
1976 VN_RELE(vp);
1977 *status = puterrno(error);
1978 return;
1979 }
1980
1981 /*
1982 * If the file is delegated to an v4 client, then initiate
1983 * recall and drop this request (by setting T_WOULDBLOCK).
1984 * The client will eventually re-transmit the request and
1985 * (hopefully), by then, the v4 client will have returned
1986 * the delegation.
1987 */
1988
1989 if (rfs4_check_delegated(FWRITE, targvp, TRUE)) {
1990 VN_RELE(vp);
1991 VN_RELE(targvp);
1992 curthread->t_flag |= T_WOULDBLOCK;
1993 return;
1994 }
1995
1996 if (nbl_need_check(targvp)) {
1997 nbl_start_crit(targvp, RW_READER);
1998 in_crit = 1;
1999 if (nbl_conflict(targvp, NBL_REMOVE, 0, 0, 0, NULL)) {
2000 error = EACCES;
2001 goto out;
2002 }
2003 }
2004
2005 error = VOP_REMOVE(vp, da->da_name, cr, NULL, 0);
2006
2007 /*
2008 * Force modified data and metadata out to stable storage.
2009 */
2010 (void) VOP_FSYNC(vp, 0, cr, NULL);
2011
2012 out:
2013 if (in_crit)
2014 nbl_end_crit(targvp);
2015 VN_RELE(targvp);
2016 VN_RELE(vp);
2017
2018 *status = puterrno(error);
2019
2020 }
2021
2022 void *
2023 rfs_remove_getfh(struct nfsdiropargs *da)
2024 {
2025 return (da->da_fhandle);
2026 }
2027
2028 /*
2029 * rename a file
2030 * Give a file (from) a new name (to).
2031 */
2032 /* ARGSUSED */
2033 void
2034 rfs_rename(struct nfsrnmargs *args, enum nfsstat *status,
2035 struct exportinfo *exi, struct svc_req *req, cred_t *cr, bool_t ro)
2036 {
2037 int error = 0;
2038 vnode_t *fromvp;
2039 vnode_t *tovp;
2040 struct exportinfo *to_exi;
2041 fhandle_t *fh;
2042 vnode_t *srcvp;
2043 vnode_t *targvp;
2044 int in_crit = 0;
2045
2046 fromvp = nfs_fhtovp(args->rna_from.da_fhandle, exi);
2047 if (fromvp == NULL) {
2048 *status = NFSERR_STALE;
2049 return;
2050 }
2051
2052 fh = args->rna_to.da_fhandle;
2053 to_exi = checkexport(&fh->fh_fsid, (fid_t *)&fh->fh_xlen, NULL);
2054 if (to_exi == NULL) {
2055 VN_RELE(fromvp);
2056 *status = NFSERR_ACCES;
2057 return;
2058 }
2059 exi_rele(to_exi);
2060
2061 if (to_exi != exi) {
2062 VN_RELE(fromvp);
2063 *status = NFSERR_XDEV;
2064 return;
2065 }
2066
2067 tovp = nfs_fhtovp(args->rna_to.da_fhandle, exi);
2068 if (tovp == NULL) {
2069 VN_RELE(fromvp);
2070 *status = NFSERR_STALE;
2071 return;
2072 }
2073
2074 if (fromvp->v_type != VDIR || tovp->v_type != VDIR) {
2075 VN_RELE(tovp);
2076 VN_RELE(fromvp);
2077 *status = NFSERR_NOTDIR;
2078 return;
2079 }
2080
2081 /*
2082 * Disallow NULL paths
2083 */
2084 if (args->rna_from.da_name == NULL || *args->rna_from.da_name == '\0' ||
2085 args->rna_to.da_name == NULL || *args->rna_to.da_name == '\0') {
2086 VN_RELE(tovp);
2087 VN_RELE(fromvp);
2088 *status = NFSERR_ACCES;
2089 return;
2090 }
2091
2092 if (rdonly(ro, tovp)) {
2093 VN_RELE(tovp);
2094 VN_RELE(fromvp);
2095 *status = NFSERR_ROFS;
2096 return;
2097 }
2098
2099 /*
2100 * Check for a conflict with a non-blocking mandatory share reservation.
2101 */
2102 error = VOP_LOOKUP(fromvp, args->rna_from.da_name, &srcvp, NULL, 0,
2103 NULL, cr, NULL, NULL, NULL);
2104 if (error != 0) {
2105 VN_RELE(tovp);
2106 VN_RELE(fromvp);
2107 *status = puterrno(error);
2108 return;
2109 }
2110
2111 /* Check for delegations on the source file */
2112
2113 if (rfs4_check_delegated(FWRITE, srcvp, FALSE)) {
2114 VN_RELE(tovp);
2115 VN_RELE(fromvp);
2116 VN_RELE(srcvp);
2117 curthread->t_flag |= T_WOULDBLOCK;
2118 return;
2119 }
2120
2121 /* Check for delegation on the file being renamed over, if it exists */
2122
2123 if (rfs4_deleg_policy != SRV_NEVER_DELEGATE &&
2124 VOP_LOOKUP(tovp, args->rna_to.da_name, &targvp, NULL, 0, NULL, cr,
2125 NULL, NULL, NULL) == 0) {
2126
2127 if (rfs4_check_delegated(FWRITE, targvp, TRUE)) {
2128 VN_RELE(tovp);
2129 VN_RELE(fromvp);
2130 VN_RELE(srcvp);
2131 VN_RELE(targvp);
2132 curthread->t_flag |= T_WOULDBLOCK;
2133 return;
2134 }
2135 VN_RELE(targvp);
2136 }
2137
2138
2139 if (nbl_need_check(srcvp)) {
2140 nbl_start_crit(srcvp, RW_READER);
2141 in_crit = 1;
2142 if (nbl_conflict(srcvp, NBL_RENAME, 0, 0, 0, NULL)) {
2143 error = EACCES;
2144 goto out;
2145 }
2146 }
2147
2148 error = VOP_RENAME(fromvp, args->rna_from.da_name,
2149 tovp, args->rna_to.da_name, cr, NULL, 0);
2150
2151 if (error == 0)
2152 vn_renamepath(tovp, srcvp, args->rna_to.da_name,
2153 strlen(args->rna_to.da_name));
2154
2155 /*
2156 * Force modified data and metadata out to stable storage.
2157 */
2158 (void) VOP_FSYNC(tovp, 0, cr, NULL);
2159 (void) VOP_FSYNC(fromvp, 0, cr, NULL);
2160
2161 out:
2162 if (in_crit)
2163 nbl_end_crit(srcvp);
2164 VN_RELE(srcvp);
2165 VN_RELE(tovp);
2166 VN_RELE(fromvp);
2167
2168 *status = puterrno(error);
2169
2170 }
2171 void *
2172 rfs_rename_getfh(struct nfsrnmargs *args)
2173 {
2174 return (args->rna_from.da_fhandle);
2175 }
2176
2177 /*
2178 * Link to a file.
2179 * Create a file (to) which is a hard link to the given file (from).
2180 */
2181 /* ARGSUSED */
2182 void
2183 rfs_link(struct nfslinkargs *args, enum nfsstat *status,
2184 struct exportinfo *exi, struct svc_req *req, cred_t *cr, bool_t ro)
2185 {
2186 int error;
2187 vnode_t *fromvp;
2188 vnode_t *tovp;
2189 struct exportinfo *to_exi;
2190 fhandle_t *fh;
2191
2192 fromvp = nfs_fhtovp(args->la_from, exi);
2193 if (fromvp == NULL) {
2194 *status = NFSERR_STALE;
2195 return;
2196 }
2197
2198 fh = args->la_to.da_fhandle;
2199 to_exi = checkexport(&fh->fh_fsid, (fid_t *)&fh->fh_xlen, NULL);
2200 if (to_exi == NULL) {
2201 VN_RELE(fromvp);
2202 *status = NFSERR_ACCES;
2203 return;
2204 }
2205 exi_rele(to_exi);
2206
2207 if (to_exi != exi) {
2208 VN_RELE(fromvp);
2209 *status = NFSERR_XDEV;
2210 return;
2211 }
2212
2213 tovp = nfs_fhtovp(args->la_to.da_fhandle, exi);
2214 if (tovp == NULL) {
2215 VN_RELE(fromvp);
2216 *status = NFSERR_STALE;
2217 return;
2218 }
2219
2220 if (tovp->v_type != VDIR) {
2221 VN_RELE(tovp);
2222 VN_RELE(fromvp);
2223 *status = NFSERR_NOTDIR;
2224 return;
2225 }
2226 /*
2227 * Disallow NULL paths
2228 */
2229 if (args->la_to.da_name == NULL || *args->la_to.da_name == '\0') {
2230 VN_RELE(tovp);
2231 VN_RELE(fromvp);
2232 *status = NFSERR_ACCES;
2233 return;
2234 }
2235
2236 if (rdonly(ro, tovp)) {
2237 VN_RELE(tovp);
2238 VN_RELE(fromvp);
2239 *status = NFSERR_ROFS;
2240 return;
2241 }
2242
2243 error = VOP_LINK(tovp, fromvp, args->la_to.da_name, cr, NULL, 0);
2244
2245 /*
2246 * Force modified data and metadata out to stable storage.
2247 */
2248 (void) VOP_FSYNC(tovp, 0, cr, NULL);
2249 (void) VOP_FSYNC(fromvp, FNODSYNC, cr, NULL);
2250
2251 VN_RELE(tovp);
2252 VN_RELE(fromvp);
2253
2254 *status = puterrno(error);
2255
2256 }
2257 void *
2258 rfs_link_getfh(struct nfslinkargs *args)
2259 {
2260 return (args->la_from);
2261 }
2262
2263 /*
2264 * Symbolicly link to a file.
2265 * Create a file (to) with the given attributes which is a symbolic link
2266 * to the given path name (to).
2267 */
2268 void
2269 rfs_symlink(struct nfsslargs *args, enum nfsstat *status,
2270 struct exportinfo *exi, struct svc_req *req, cred_t *cr, bool_t ro)
2271 {
2272 int error;
2273 struct vattr va;
2274 vnode_t *vp;
2275 vnode_t *svp;
2276 int lerror;
2277 struct sockaddr *ca;
2278 char *name = NULL;
2279
2280 /*
2281 * Disallow NULL paths
2282 */
2283 if (args->sla_from.da_name == NULL || *args->sla_from.da_name == '\0') {
2284 *status = NFSERR_ACCES;
2285 return;
2286 }
2287
2288 vp = nfs_fhtovp(args->sla_from.da_fhandle, exi);
2289 if (vp == NULL) {
2290 *status = NFSERR_STALE;
2291 return;
2292 }
2293
2294 if (rdonly(ro, vp)) {
2295 VN_RELE(vp);
2296 *status = NFSERR_ROFS;
2297 return;
2298 }
2299
2300 error = sattr_to_vattr(args->sla_sa, &va);
2301 if (error) {
2302 VN_RELE(vp);
2303 *status = puterrno(error);
2304 return;
2305 }
2306
2307 if (!(va.va_mask & AT_MODE)) {
2308 VN_RELE(vp);
2309 *status = NFSERR_INVAL;
2310 return;
2311 }
2312
2313 ca = (struct sockaddr *)svc_getrpccaller(req->rq_xprt)->buf;
2314 name = nfscmd_convname(ca, exi, args->sla_tnm,
2315 NFSCMD_CONV_INBOUND, MAXPATHLEN);
2316
2317 if (name == NULL) {
2318 *status = NFSERR_ACCES;
2319 return;
2320 }
2321
2322 va.va_type = VLNK;
2323 va.va_mask |= AT_TYPE;
2324
2325 error = VOP_SYMLINK(vp, args->sla_from.da_name, &va, name, cr, NULL, 0);
2326
2327 /*
2328 * Force new data and metadata out to stable storage.
2329 */
2330 lerror = VOP_LOOKUP(vp, args->sla_from.da_name, &svp, NULL, 0,
2331 NULL, cr, NULL, NULL, NULL);
2332
2333 if (!lerror) {
2334 (void) VOP_FSYNC(svp, 0, cr, NULL);
2335 VN_RELE(svp);
2336 }
2337
2338 /*
2339 * Force modified data and metadata out to stable storage.
2340 */
2341 (void) VOP_FSYNC(vp, 0, cr, NULL);
2342
2343 VN_RELE(vp);
2344
2345 *status = puterrno(error);
2346 if (name != args->sla_tnm)
2347 kmem_free(name, MAXPATHLEN);
2348
2349 }
2350 void *
2351 rfs_symlink_getfh(struct nfsslargs *args)
2352 {
2353 return (args->sla_from.da_fhandle);
2354 }
2355
2356 /*
2357 * Make a directory.
2358 * Create a directory with the given name, parent directory, and attributes.
2359 * Returns a file handle and attributes for the new directory.
2360 */
2361 /* ARGSUSED */
2362 void
2363 rfs_mkdir(struct nfscreatargs *args, struct nfsdiropres *dr,
2364 struct exportinfo *exi, struct svc_req *req, cred_t *cr, bool_t ro)
2365 {
2366 int error;
2367 struct vattr va;
2368 vnode_t *dvp = NULL;
2369 vnode_t *vp;
2370 char *name = args->ca_da.da_name;
2371
2372 /*
2373 * Disallow NULL paths
2374 */
2375 if (name == NULL || *name == '\0') {
2376 dr->dr_status = NFSERR_ACCES;
2377 return;
2378 }
2379
2380 vp = nfs_fhtovp(args->ca_da.da_fhandle, exi);
2381 if (vp == NULL) {
2382 dr->dr_status = NFSERR_STALE;
2383 return;
2384 }
2385
2386 if (rdonly(ro, vp)) {
2387 VN_RELE(vp);
2388 dr->dr_status = NFSERR_ROFS;
2389 return;
2390 }
2391
2392 error = sattr_to_vattr(args->ca_sa, &va);
2393 if (error) {
2394 VN_RELE(vp);
2395 dr->dr_status = puterrno(error);
2396 return;
2397 }
2398
2399 if (!(va.va_mask & AT_MODE)) {
2400 VN_RELE(vp);
2401 dr->dr_status = NFSERR_INVAL;
2402 return;
2403 }
2404
2405 va.va_type = VDIR;
2406 va.va_mask |= AT_TYPE;
2407
2408 error = VOP_MKDIR(vp, name, &va, &dvp, cr, NULL, 0, NULL);
2409
2410 if (!error) {
2411 /*
2412 * Attribtutes of the newly created directory should
2413 * be returned to the client.
2414 */
2415 va.va_mask = AT_ALL; /* We want everything */
2416 error = VOP_GETATTR(dvp, &va, 0, cr, NULL);
2417
2418 /* check for overflows */
2419 if (!error) {
2420 acl_perm(vp, exi, &va, cr);
2421 error = vattr_to_nattr(&va, &dr->dr_attr);
2422 if (!error) {
2423 error = makefh(&dr->dr_fhandle, dvp, exi);
2424 }
2425 }
2426 /*
2427 * Force new data and metadata out to stable storage.
2428 */
2429 (void) VOP_FSYNC(dvp, 0, cr, NULL);
2430 VN_RELE(dvp);
2431 }
2432
2433 /*
2434 * Force modified data and metadata out to stable storage.
2435 */
2436 (void) VOP_FSYNC(vp, 0, cr, NULL);
2437
2438 VN_RELE(vp);
2439
2440 dr->dr_status = puterrno(error);
2441
2442 }
2443 void *
2444 rfs_mkdir_getfh(struct nfscreatargs *args)
2445 {
2446 return (args->ca_da.da_fhandle);
2447 }
2448
2449 /*
2450 * Remove a directory.
2451 * Remove the given directory name from the given parent directory.
2452 */
2453 /* ARGSUSED */
2454 void
2455 rfs_rmdir(struct nfsdiropargs *da, enum nfsstat *status,
2456 struct exportinfo *exi, struct svc_req *req, cred_t *cr, bool_t ro)
2457 {
2458 int error;
2459 vnode_t *vp;
2460
2461 /*
2462 * Disallow NULL paths
2463 */
2464 if (da->da_name == NULL || *da->da_name == '\0') {
2465 *status = NFSERR_ACCES;
2466 return;
2467 }
2468
2469 vp = nfs_fhtovp(da->da_fhandle, exi);
2470 if (vp == NULL) {
2471 *status = NFSERR_STALE;
2472 return;
2473 }
2474
2475 if (rdonly(ro, vp)) {
2476 VN_RELE(vp);
2477 *status = NFSERR_ROFS;
2478 return;
2479 }
2480
2481 /*
2482 * VOP_RMDIR takes a third argument (the current
2483 * directory of the process). That's because someone
2484 * wants to return EINVAL if one tries to remove ".".
2485 * Of course, NFS servers have no idea what their
2486 * clients' current directories are. We fake it by
2487 * supplying a vnode known to exist and illegal to
2488 * remove.
2489 */
2490 error = VOP_RMDIR(vp, da->da_name, rootdir, cr, NULL, 0);
2491
2492 /*
2493 * Force modified data and metadata out to stable storage.
2494 */
2495 (void) VOP_FSYNC(vp, 0, cr, NULL);
2496
2497 VN_RELE(vp);
2498
2499 /*
2500 * System V defines rmdir to return EEXIST, not ENOTEMPTY,
2501 * if the directory is not empty. A System V NFS server
2502 * needs to map NFSERR_EXIST to NFSERR_NOTEMPTY to transmit
2503 * over the wire.
2504 */
2505 if (error == EEXIST)
2506 *status = NFSERR_NOTEMPTY;
2507 else
2508 *status = puterrno(error);
2509
2510 }
2511 void *
2512 rfs_rmdir_getfh(struct nfsdiropargs *da)
2513 {
2514 return (da->da_fhandle);
2515 }
2516
2517 /* ARGSUSED */
2518 void
2519 rfs_readdir(struct nfsrddirargs *rda, struct nfsrddirres *rd,
2520 struct exportinfo *exi, struct svc_req *req, cred_t *cr, bool_t ro)
2521 {
2522 int error;
2523 int iseof;
2524 struct iovec iov;
2525 struct uio uio;
2526 vnode_t *vp;
2527 char *ndata = NULL;
2528 struct sockaddr *ca;
2529 size_t nents;
2530 int ret;
2531
2532 vp = nfs_fhtovp(&rda->rda_fh, exi);
2533 if (vp == NULL) {
2534 rd->rd_entries = NULL;
2535 rd->rd_status = NFSERR_STALE;
2536 return;
2537 }
2538
2539 if (vp->v_type != VDIR) {
2540 VN_RELE(vp);
2541 rd->rd_entries = NULL;
2542 rd->rd_status = NFSERR_NOTDIR;
2543 return;
2544 }
2545
2546 (void) VOP_RWLOCK(vp, V_WRITELOCK_FALSE, NULL);
2547
2548 error = VOP_ACCESS(vp, VREAD, 0, cr, NULL);
2549
2550 if (error) {
2551 rd->rd_entries = NULL;
2552 goto bad;
2553 }
2554
2555 if (rda->rda_count == 0) {
2556 rd->rd_entries = NULL;
2557 rd->rd_size = 0;
2558 rd->rd_eof = FALSE;
2559 goto bad;
2560 }
2561
2562 rda->rda_count = MIN(rda->rda_count, NFS_MAXDATA);
2563
2564 /*
2565 * Allocate data for entries. This will be freed by rfs_rddirfree.
2566 */
2567 rd->rd_bufsize = (uint_t)rda->rda_count;
2568 rd->rd_entries = kmem_alloc(rd->rd_bufsize, KM_SLEEP);
2569
2570 /*
2571 * Set up io vector to read directory data
2572 */
2573 iov.iov_base = (caddr_t)rd->rd_entries;
2574 iov.iov_len = rda->rda_count;
2575 uio.uio_iov = &iov;
2576 uio.uio_iovcnt = 1;
2577 uio.uio_segflg = UIO_SYSSPACE;
2578 uio.uio_extflg = UIO_COPY_CACHED;
2579 uio.uio_loffset = (offset_t)rda->rda_offset;
2580 uio.uio_resid = rda->rda_count;
2581
2582 /*
2583 * read directory
2584 */
2585 error = VOP_READDIR(vp, &uio, cr, &iseof, NULL, 0);
2586
2587 /*
2588 * Clean up
2589 */
2590 if (!error) {
2591 /*
2592 * set size and eof
2593 */
2594 if (uio.uio_resid == rda->rda_count) {
2595 rd->rd_size = 0;
2596 rd->rd_eof = TRUE;
2597 } else {
2598 rd->rd_size = (uint32_t)(rda->rda_count -
2599 uio.uio_resid);
2600 rd->rd_eof = iseof ? TRUE : FALSE;
2601 }
2602 }
2603
2604 ca = (struct sockaddr *)svc_getrpccaller(req->rq_xprt)->buf;
2605 nents = nfscmd_countents((char *)rd->rd_entries, rd->rd_size);
2606 ret = nfscmd_convdirplus(ca, exi, (char *)rd->rd_entries, nents,
2607 rda->rda_count, &ndata);
2608
2609 if (ret != 0) {
2610 size_t dropbytes;
2611 /*
2612 * We had to drop one or more entries in order to fit
2613 * during the character conversion. We need to patch
2614 * up the size and eof info.
2615 */
2616 if (rd->rd_eof)
2617 rd->rd_eof = FALSE;
2618 dropbytes = nfscmd_dropped_entrysize(
2619 (struct dirent64 *)rd->rd_entries, nents, ret);
2620 rd->rd_size -= dropbytes;
2621 }
2622 if (ndata == NULL) {
2623 ndata = (char *)rd->rd_entries;
2624 } else if (ndata != (char *)rd->rd_entries) {
2625 kmem_free(rd->rd_entries, rd->rd_bufsize);
2626 rd->rd_entries = (void *)ndata;
2627 rd->rd_bufsize = rda->rda_count;
2628 }
2629
2630 bad:
2631 VOP_RWUNLOCK(vp, V_WRITELOCK_FALSE, NULL);
2632
2633 #if 0 /* notyet */
2634 /*
2635 * Don't do this. It causes local disk writes when just
2636 * reading the file and the overhead is deemed larger
2637 * than the benefit.
2638 */
2639 /*
2640 * Force modified metadata out to stable storage.
2641 */
2642 (void) VOP_FSYNC(vp, FNODSYNC, cr, NULL);
2643 #endif
2644
2645 VN_RELE(vp);
2646
2647 rd->rd_status = puterrno(error);
2648
2649 }
2650 void *
2651 rfs_readdir_getfh(struct nfsrddirargs *rda)
2652 {
2653 return (&rda->rda_fh);
2654 }
2655 void
2656 rfs_rddirfree(struct nfsrddirres *rd)
2657 {
2658 if (rd->rd_entries != NULL)
2659 kmem_free(rd->rd_entries, rd->rd_bufsize);
2660 }
2661
2662 /* ARGSUSED */
2663 void
2664 rfs_statfs(fhandle_t *fh, struct nfsstatfs *fs, struct exportinfo *exi,
2665 struct svc_req *req, cred_t *cr, bool_t ro)
2666 {
2667 int error;
2668 struct statvfs64 sb;
2669 vnode_t *vp;
2670
2671 vp = nfs_fhtovp(fh, exi);
2672 if (vp == NULL) {
2673 fs->fs_status = NFSERR_STALE;
2674 return;
2675 }
2676
2677 error = VFS_STATVFS(vp->v_vfsp, &sb);
2678
2679 if (!error) {
2680 fs->fs_tsize = nfstsize();
2681 fs->fs_bsize = sb.f_frsize;
2682 fs->fs_blocks = sb.f_blocks;
2683 fs->fs_bfree = sb.f_bfree;
2684 fs->fs_bavail = sb.f_bavail;
2685 }
2686
2687 VN_RELE(vp);
2688
2689 fs->fs_status = puterrno(error);
2690
2691 }
2692 void *
2693 rfs_statfs_getfh(fhandle_t *fh)
2694 {
2695 return (fh);
2696 }
2697
2698 static int
2699 sattr_to_vattr(struct nfssattr *sa, struct vattr *vap)
2700 {
2701 vap->va_mask = 0;
2702
2703 /*
2704 * There was a sign extension bug in some VFS based systems
2705 * which stored the mode as a short. When it would get
2706 * assigned to a u_long, no sign extension would occur.
2707 * It needed to, but this wasn't noticed because sa_mode
2708 * would then get assigned back to the short, thus ignoring
2709 * the upper 16 bits of sa_mode.
2710 *
2711 * To make this implementation work for both broken
2712 * clients and good clients, we check for both versions
2713 * of the mode.
2714 */
2715 if (sa->sa_mode != (uint32_t)((ushort_t)-1) &&
2716 sa->sa_mode != (uint32_t)-1) {
2717 vap->va_mask |= AT_MODE;
2718 vap->va_mode = sa->sa_mode;
2719 }
2720 if (sa->sa_uid != (uint32_t)-1) {
2721 vap->va_mask |= AT_UID;
2722 vap->va_uid = sa->sa_uid;
2723 }
2724 if (sa->sa_gid != (uint32_t)-1) {
2725 vap->va_mask |= AT_GID;
2726 vap->va_gid = sa->sa_gid;
2727 }
2728 if (sa->sa_size != (uint32_t)-1) {
2729 vap->va_mask |= AT_SIZE;
2730 vap->va_size = sa->sa_size;
2731 }
2732 if (sa->sa_atime.tv_sec != (int32_t)-1 &&
2733 sa->sa_atime.tv_usec != (int32_t)-1) {
2734 #ifndef _LP64
2735 /* return error if time overflow */
2736 if (!NFS2_TIME_OK(sa->sa_atime.tv_sec))
2737 return (EOVERFLOW);
2738 #endif
2739 vap->va_mask |= AT_ATIME;
2740 /*
2741 * nfs protocol defines times as unsigned so don't extend sign,
2742 * unless sysadmin set nfs_allow_preepoch_time.
2743 */
2744 NFS_TIME_T_CONVERT(vap->va_atime.tv_sec, sa->sa_atime.tv_sec);
2745 vap->va_atime.tv_nsec = (uint32_t)(sa->sa_atime.tv_usec * 1000);
2746 }
2747 if (sa->sa_mtime.tv_sec != (int32_t)-1 &&
2748 sa->sa_mtime.tv_usec != (int32_t)-1) {
2749 #ifndef _LP64
2750 /* return error if time overflow */
2751 if (!NFS2_TIME_OK(sa->sa_mtime.tv_sec))
2752 return (EOVERFLOW);
2753 #endif
2754 vap->va_mask |= AT_MTIME;
2755 /*
2756 * nfs protocol defines times as unsigned so don't extend sign,
2757 * unless sysadmin set nfs_allow_preepoch_time.
2758 */
2759 NFS_TIME_T_CONVERT(vap->va_mtime.tv_sec, sa->sa_mtime.tv_sec);
2760 vap->va_mtime.tv_nsec = (uint32_t)(sa->sa_mtime.tv_usec * 1000);
2761 }
2762 return (0);
2763 }
2764
2765 static enum nfsftype vt_to_nf[] = {
2766 0, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, 0, 0, 0, NFSOC, 0
2767 };
2768
2769 /*
2770 * check the following fields for overflow: nodeid, size, and time.
2771 * There could be a problem when converting 64-bit LP64 fields
2772 * into 32-bit ones. Return an error if there is an overflow.
2773 */
2774 int
2775 vattr_to_nattr(struct vattr *vap, struct nfsfattr *na)
2776 {
2777 ASSERT(vap->va_type >= VNON && vap->va_type <= VBAD);
2778 na->na_type = vt_to_nf[vap->va_type];
2779
2780 if (vap->va_mode == (unsigned short) -1)
2781 na->na_mode = (uint32_t)-1;
2782 else
2783 na->na_mode = VTTOIF(vap->va_type) | vap->va_mode;
2784
2785 if (vap->va_uid == (unsigned short)(-1))
2786 na->na_uid = (uint32_t)(-1);
2787 else if (vap->va_uid == UID_NOBODY)
2788 na->na_uid = (uint32_t)NFS_UID_NOBODY;
2789 else
2790 na->na_uid = vap->va_uid;
2791
2792 if (vap->va_gid == (unsigned short)(-1))
2793 na->na_gid = (uint32_t)-1;
2794 else if (vap->va_gid == GID_NOBODY)
2795 na->na_gid = (uint32_t)NFS_GID_NOBODY;
2796 else
2797 na->na_gid = vap->va_gid;
2798
2799 /*
2800 * Do we need to check fsid for overflow? It is 64-bit in the
2801 * vattr, but are bigger than 32 bit values supported?
2802 */
2803 na->na_fsid = vap->va_fsid;
2804
2805 na->na_nodeid = vap->va_nodeid;
2806
2807 /*
2808 * Check to make sure that the nodeid is representable over the
2809 * wire without losing bits.
2810 */
2811 if (vap->va_nodeid != (u_longlong_t)na->na_nodeid)
2812 return (EFBIG);
2813 na->na_nlink = vap->va_nlink;
2814
2815 /*
2816 * Check for big files here, instead of at the caller. See
2817 * comments in cstat for large special file explanation.
2818 */
2819 if (vap->va_size > (u_longlong_t)MAXOFF32_T) {
2820 if ((vap->va_type == VREG) || (vap->va_type == VDIR))
2821 return (EFBIG);
2822 if ((vap->va_type == VBLK) || (vap->va_type == VCHR)) {
2823 /* UNKNOWN_SIZE | OVERFLOW */
2824 na->na_size = MAXOFF32_T;
2825 } else
2826 na->na_size = vap->va_size;
2827 } else
2828 na->na_size = vap->va_size;
2829
2830 /*
2831 * If the vnode times overflow the 32-bit times that NFS2
2832 * uses on the wire then return an error.
2833 */
2834 if (!NFS_VAP_TIME_OK(vap)) {
2835 return (EOVERFLOW);
2836 }
2837 na->na_atime.tv_sec = vap->va_atime.tv_sec;
2838 na->na_atime.tv_usec = vap->va_atime.tv_nsec / 1000;
2839
2840 na->na_mtime.tv_sec = vap->va_mtime.tv_sec;
2841 na->na_mtime.tv_usec = vap->va_mtime.tv_nsec / 1000;
2842
2843 na->na_ctime.tv_sec = vap->va_ctime.tv_sec;
2844 na->na_ctime.tv_usec = vap->va_ctime.tv_nsec / 1000;
2845
2846 /*
2847 * If the dev_t will fit into 16 bits then compress
2848 * it, otherwise leave it alone. See comments in
2849 * nfs_client.c.
2850 */
2851 if (getminor(vap->va_rdev) <= SO4_MAXMIN &&
2852 getmajor(vap->va_rdev) <= SO4_MAXMAJ)
2853 na->na_rdev = nfsv2_cmpdev(vap->va_rdev);
2854 else
2855 (void) cmpldev(&na->na_rdev, vap->va_rdev);
2856
2857 na->na_blocks = vap->va_nblocks;
2858 na->na_blocksize = vap->va_blksize;
2859
2860 /*
2861 * This bit of ugliness is a *TEMPORARY* hack to preserve the
2862 * over-the-wire protocols for named-pipe vnodes. It remaps the
2863 * VFIFO type to the special over-the-wire type. (see note in nfs.h)
2864 *
2865 * BUYER BEWARE:
2866 * If you are porting the NFS to a non-Sun server, you probably
2867 * don't want to include the following block of code. The
2868 * over-the-wire special file types will be changing with the
2869 * NFS Protocol Revision.
2870 */
2871 if (vap->va_type == VFIFO)
2872 NA_SETFIFO(na);
2873 return (0);
2874 }
2875
2876 /*
2877 * acl v2 support: returns approximate permission.
2878 * default: returns minimal permission (more restrictive)
2879 * aclok: returns maximal permission (less restrictive)
2880 * This routine changes the permissions that are alaredy in *va.
2881 * If a file has minimal ACL, i.e. aclcnt == MIN_ACL_ENTRIES,
2882 * CLASS_OBJ is always the same as GROUP_OBJ entry.
2883 */
2884 static void
2885 acl_perm(struct vnode *vp, struct exportinfo *exi, struct vattr *va, cred_t *cr)
2886 {
2887 vsecattr_t vsa;
2888 int aclcnt;
2889 aclent_t *aclentp;
2890 mode_t mask_perm;
2891 mode_t grp_perm;
2892 mode_t other_perm;
2893 mode_t other_orig;
2894 int error;
2895
2896 /* dont care default acl */
2897 vsa.vsa_mask = (VSA_ACL | VSA_ACLCNT);
2898 error = VOP_GETSECATTR(vp, &vsa, 0, cr, NULL);
2899
2900 if (!error) {
2901 aclcnt = vsa.vsa_aclcnt;
2902 if (aclcnt > MIN_ACL_ENTRIES) {
2903 /* non-trivial ACL */
2904 aclentp = vsa.vsa_aclentp;
2905 if (exi->exi_export.ex_flags & EX_ACLOK) {
2906 /* maximal permissions */
2907 grp_perm = 0;
2908 other_perm = 0;
2909 for (; aclcnt > 0; aclcnt--, aclentp++) {
2910 switch (aclentp->a_type) {
2911 case USER_OBJ:
2912 break;
2913 case USER:
2914 grp_perm |=
2915 aclentp->a_perm << 3;
2916 other_perm |= aclentp->a_perm;
2917 break;
2918 case GROUP_OBJ:
2919 grp_perm |=
2920 aclentp->a_perm << 3;
2921 break;
2922 case GROUP:
2923 other_perm |= aclentp->a_perm;
2924 break;
2925 case OTHER_OBJ:
2926 other_orig = aclentp->a_perm;
2927 break;
2928 case CLASS_OBJ:
2929 mask_perm = aclentp->a_perm;
2930 break;
2931 default:
2932 break;
2933 }
2934 }
2935 grp_perm &= mask_perm << 3;
2936 other_perm &= mask_perm;
2937 other_perm |= other_orig;
2938
2939 } else {
2940 /* minimal permissions */
2941 grp_perm = 070;
2942 other_perm = 07;
2943 for (; aclcnt > 0; aclcnt--, aclentp++) {
2944 switch (aclentp->a_type) {
2945 case USER_OBJ:
2946 break;
2947 case USER:
2948 case CLASS_OBJ:
2949 grp_perm &=
2950 aclentp->a_perm << 3;
2951 other_perm &=
2952 aclentp->a_perm;
2953 break;
2954 case GROUP_OBJ:
2955 grp_perm &=
2956 aclentp->a_perm << 3;
2957 break;
2958 case GROUP:
2959 other_perm &=
2960 aclentp->a_perm;
2961 break;
2962 case OTHER_OBJ:
2963 other_perm &=
2964 aclentp->a_perm;
2965 break;
2966 default:
2967 break;
2968 }
2969 }
2970 }
2971 /* copy to va */
2972 va->va_mode &= ~077;
2973 va->va_mode |= grp_perm | other_perm;
2974 }
2975 if (vsa.vsa_aclcnt)
2976 kmem_free(vsa.vsa_aclentp,
2977 vsa.vsa_aclcnt * sizeof (aclent_t));
2978 }
2979 }
2980
2981 void
2982 rfs_srvrinit(void)
2983 {
2984 mutex_init(&rfs_async_write_lock, NULL, MUTEX_DEFAULT, NULL);
2985 nfs2_srv_caller_id = fs_new_caller_id();
2986 }
2987
2988 void
2989 rfs_srvrfini(void)
2990 {
2991 mutex_destroy(&rfs_async_write_lock);
2992 }
2993
2994 static int
2995 rdma_setup_read_data2(struct nfsreadargs *ra, struct nfsrdresult *rr)
2996 {
2997 struct clist *wcl;
2998 int wlist_len;
2999 uint32_t count = rr->rr_count;
3000
3001 wcl = ra->ra_wlist;
3002
3003 if (rdma_setup_read_chunks(wcl, count, &wlist_len) == FALSE) {
3004 return (FALSE);
3005 }
3006
3007 wcl = ra->ra_wlist;
3008 rr->rr_ok.rrok_wlist_len = wlist_len;
3009 rr->rr_ok.rrok_wlist = wcl;
3010
3011 return (TRUE);
3012 }