[PATCH] knfsd: add some new fsid types
[linux-2.6.22.y-op.git] / fs / nfsd / nfs4xdr.c
blob0efba557fb55b9b84ed801e6b57757b1883c075b
1 /*
2 * fs/nfs/nfs4xdr.c
4 * Server-side XDR for NFSv4
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 * TODO: Neil Brown made the following observation: We currently
38 * initially reserve NFSD_BUFSIZE space on the transmit queue and
39 * never release any of that until the request is complete.
40 * It would be good to calculate a new maximum response size while
41 * decoding the COMPOUND, and call svc_reserve with this number
42 * at the end of nfs4svc_decode_compoundargs.
45 #include <linux/param.h>
46 #include <linux/smp.h>
47 #include <linux/smp_lock.h>
48 #include <linux/fs.h>
49 #include <linux/namei.h>
50 #include <linux/vfs.h>
51 #include <linux/sunrpc/xdr.h>
52 #include <linux/sunrpc/svc.h>
53 #include <linux/sunrpc/clnt.h>
54 #include <linux/nfsd/nfsd.h>
55 #include <linux/nfsd/state.h>
56 #include <linux/nfsd/xdr4.h>
57 #include <linux/nfsd_idmap.h>
58 #include <linux/nfs4.h>
59 #include <linux/nfs4_acl.h>
61 #define NFSDDBG_FACILITY NFSDDBG_XDR
64 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
65 * directory in order to indicate to the client that a filesystem boundary is present
66 * We use a fixed fsid for a referral
68 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
69 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
71 static __be32
72 check_filename(char *str, int len, __be32 err)
74 int i;
76 if (len == 0)
77 return nfserr_inval;
78 if (isdotent(str, len))
79 return err;
80 for (i = 0; i < len; i++)
81 if (str[i] == '/')
82 return err;
83 return 0;
87 * START OF "GENERIC" DECODE ROUTINES.
88 * These may look a little ugly since they are imported from a "generic"
89 * set of XDR encode/decode routines which are intended to be shared by
90 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
92 * If the pain of reading these is too great, it should be a straightforward
93 * task to translate them into Linux-specific versions which are more
94 * consistent with the style used in NFSv2/v3...
96 #define DECODE_HEAD \
97 __be32 *p; \
98 __be32 status
99 #define DECODE_TAIL \
100 status = 0; \
101 out: \
102 return status; \
103 xdr_error: \
104 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
105 status = nfserr_bad_xdr; \
106 goto out
108 #define READ32(x) (x) = ntohl(*p++)
109 #define READ64(x) do { \
110 (x) = (u64)ntohl(*p++) << 32; \
111 (x) |= ntohl(*p++); \
112 } while (0)
113 #define READTIME(x) do { \
114 p++; \
115 (x) = ntohl(*p++); \
116 p++; \
117 } while (0)
118 #define READMEM(x,nbytes) do { \
119 x = (char *)p; \
120 p += XDR_QUADLEN(nbytes); \
121 } while (0)
122 #define SAVEMEM(x,nbytes) do { \
123 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
124 savemem(argp, p, nbytes) : \
125 (char *)p)) { \
126 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
127 goto xdr_error; \
129 p += XDR_QUADLEN(nbytes); \
130 } while (0)
131 #define COPYMEM(x,nbytes) do { \
132 memcpy((x), p, nbytes); \
133 p += XDR_QUADLEN(nbytes); \
134 } while (0)
136 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
137 #define READ_BUF(nbytes) do { \
138 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
139 p = argp->p; \
140 argp->p += XDR_QUADLEN(nbytes); \
141 } else if (!(p = read_buf(argp, nbytes))) { \
142 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
143 goto xdr_error; \
145 } while (0)
147 static __be32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes)
149 /* We want more bytes than seem to be available.
150 * Maybe we need a new page, maybe we have just run out
152 int avail = (char*)argp->end - (char*)argp->p;
153 __be32 *p;
154 if (avail + argp->pagelen < nbytes)
155 return NULL;
156 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
157 return NULL;
158 /* ok, we can do it with the current plus the next page */
159 if (nbytes <= sizeof(argp->tmp))
160 p = argp->tmp;
161 else {
162 kfree(argp->tmpp);
163 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
164 if (!p)
165 return NULL;
168 memcpy(p, argp->p, avail);
169 /* step to next page */
170 argp->p = page_address(argp->pagelist[0]);
171 argp->pagelist++;
172 if (argp->pagelen < PAGE_SIZE) {
173 argp->end = p + (argp->pagelen>>2);
174 argp->pagelen = 0;
175 } else {
176 argp->end = p + (PAGE_SIZE>>2);
177 argp->pagelen -= PAGE_SIZE;
179 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
180 argp->p += XDR_QUADLEN(nbytes - avail);
181 return p;
184 static int
185 defer_free(struct nfsd4_compoundargs *argp,
186 void (*release)(const void *), void *p)
188 struct tmpbuf *tb;
190 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
191 if (!tb)
192 return -ENOMEM;
193 tb->buf = p;
194 tb->release = release;
195 tb->next = argp->to_free;
196 argp->to_free = tb;
197 return 0;
200 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
202 void *new = NULL;
203 if (p == argp->tmp) {
204 new = kmalloc(nbytes, GFP_KERNEL);
205 if (!new) return NULL;
206 p = new;
207 memcpy(p, argp->tmp, nbytes);
208 } else {
209 BUG_ON(p != argp->tmpp);
210 argp->tmpp = NULL;
212 if (defer_free(argp, kfree, p)) {
213 kfree(new);
214 return NULL;
215 } else
216 return (char *)p;
220 static __be32
221 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
223 u32 bmlen;
224 DECODE_HEAD;
226 bmval[0] = 0;
227 bmval[1] = 0;
229 READ_BUF(4);
230 READ32(bmlen);
231 if (bmlen > 1000)
232 goto xdr_error;
234 READ_BUF(bmlen << 2);
235 if (bmlen > 0)
236 READ32(bmval[0]);
237 if (bmlen > 1)
238 READ32(bmval[1]);
240 DECODE_TAIL;
243 static __be32
244 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
245 struct nfs4_acl **acl)
247 int expected_len, len = 0;
248 u32 dummy32;
249 char *buf;
250 int host_err;
252 DECODE_HEAD;
253 iattr->ia_valid = 0;
254 if ((status = nfsd4_decode_bitmap(argp, bmval)))
255 return status;
258 * According to spec, unsupported attributes return ERR_NOTSUPP;
259 * read-only attributes return ERR_INVAL.
261 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
262 return nfserr_attrnotsupp;
263 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
264 return nfserr_inval;
266 READ_BUF(4);
267 READ32(expected_len);
269 if (bmval[0] & FATTR4_WORD0_SIZE) {
270 READ_BUF(8);
271 len += 8;
272 READ64(iattr->ia_size);
273 iattr->ia_valid |= ATTR_SIZE;
275 if (bmval[0] & FATTR4_WORD0_ACL) {
276 int nace, i;
277 struct nfs4_ace ace;
279 READ_BUF(4); len += 4;
280 READ32(nace);
282 *acl = nfs4_acl_new();
283 if (*acl == NULL) {
284 host_err = -ENOMEM;
285 goto out_nfserr;
287 defer_free(argp, (void (*)(const void *))nfs4_acl_free, *acl);
289 for (i = 0; i < nace; i++) {
290 READ_BUF(16); len += 16;
291 READ32(ace.type);
292 READ32(ace.flag);
293 READ32(ace.access_mask);
294 READ32(dummy32);
295 READ_BUF(dummy32);
296 len += XDR_QUADLEN(dummy32) << 2;
297 READMEM(buf, dummy32);
298 ace.whotype = nfs4_acl_get_whotype(buf, dummy32);
299 host_err = 0;
300 if (ace.whotype != NFS4_ACL_WHO_NAMED)
301 ace.who = 0;
302 else if (ace.flag & NFS4_ACE_IDENTIFIER_GROUP)
303 host_err = nfsd_map_name_to_gid(argp->rqstp,
304 buf, dummy32, &ace.who);
305 else
306 host_err = nfsd_map_name_to_uid(argp->rqstp,
307 buf, dummy32, &ace.who);
308 if (host_err)
309 goto out_nfserr;
310 host_err = nfs4_acl_add_ace(*acl, ace.type, ace.flag,
311 ace.access_mask, ace.whotype, ace.who);
312 if (host_err)
313 goto out_nfserr;
315 } else
316 *acl = NULL;
317 if (bmval[1] & FATTR4_WORD1_MODE) {
318 READ_BUF(4);
319 len += 4;
320 READ32(iattr->ia_mode);
321 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
322 iattr->ia_valid |= ATTR_MODE;
324 if (bmval[1] & FATTR4_WORD1_OWNER) {
325 READ_BUF(4);
326 len += 4;
327 READ32(dummy32);
328 READ_BUF(dummy32);
329 len += (XDR_QUADLEN(dummy32) << 2);
330 READMEM(buf, dummy32);
331 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
332 goto out_nfserr;
333 iattr->ia_valid |= ATTR_UID;
335 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
336 READ_BUF(4);
337 len += 4;
338 READ32(dummy32);
339 READ_BUF(dummy32);
340 len += (XDR_QUADLEN(dummy32) << 2);
341 READMEM(buf, dummy32);
342 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
343 goto out_nfserr;
344 iattr->ia_valid |= ATTR_GID;
346 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
347 READ_BUF(4);
348 len += 4;
349 READ32(dummy32);
350 switch (dummy32) {
351 case NFS4_SET_TO_CLIENT_TIME:
352 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
353 all 32 bits of 'nseconds'. */
354 READ_BUF(12);
355 len += 12;
356 READ32(dummy32);
357 if (dummy32)
358 return nfserr_inval;
359 READ32(iattr->ia_atime.tv_sec);
360 READ32(iattr->ia_atime.tv_nsec);
361 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
362 return nfserr_inval;
363 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
364 break;
365 case NFS4_SET_TO_SERVER_TIME:
366 iattr->ia_valid |= ATTR_ATIME;
367 break;
368 default:
369 goto xdr_error;
372 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
373 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
374 all 32 bits of 'nseconds'. */
375 READ_BUF(12);
376 len += 12;
377 READ32(dummy32);
378 if (dummy32)
379 return nfserr_inval;
380 READ32(iattr->ia_ctime.tv_sec);
381 READ32(iattr->ia_ctime.tv_nsec);
382 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000)
383 return nfserr_inval;
384 iattr->ia_valid |= ATTR_CTIME;
386 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
387 READ_BUF(4);
388 len += 4;
389 READ32(dummy32);
390 switch (dummy32) {
391 case NFS4_SET_TO_CLIENT_TIME:
392 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
393 all 32 bits of 'nseconds'. */
394 READ_BUF(12);
395 len += 12;
396 READ32(dummy32);
397 if (dummy32)
398 return nfserr_inval;
399 READ32(iattr->ia_mtime.tv_sec);
400 READ32(iattr->ia_mtime.tv_nsec);
401 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
402 return nfserr_inval;
403 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
404 break;
405 case NFS4_SET_TO_SERVER_TIME:
406 iattr->ia_valid |= ATTR_MTIME;
407 break;
408 default:
409 goto xdr_error;
412 if (len != expected_len)
413 goto xdr_error;
415 DECODE_TAIL;
417 out_nfserr:
418 status = nfserrno(host_err);
419 goto out;
422 static __be32
423 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
425 DECODE_HEAD;
427 READ_BUF(4);
428 READ32(access->ac_req_access);
430 DECODE_TAIL;
433 static __be32
434 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
436 DECODE_HEAD;
438 close->cl_stateowner = NULL;
439 READ_BUF(4 + sizeof(stateid_t));
440 READ32(close->cl_seqid);
441 READ32(close->cl_stateid.si_generation);
442 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
444 DECODE_TAIL;
448 static __be32
449 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
451 DECODE_HEAD;
453 READ_BUF(12);
454 READ64(commit->co_offset);
455 READ32(commit->co_count);
457 DECODE_TAIL;
460 static __be32
461 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
463 DECODE_HEAD;
465 READ_BUF(4);
466 READ32(create->cr_type);
467 switch (create->cr_type) {
468 case NF4LNK:
469 READ_BUF(4);
470 READ32(create->cr_linklen);
471 READ_BUF(create->cr_linklen);
472 SAVEMEM(create->cr_linkname, create->cr_linklen);
473 break;
474 case NF4BLK:
475 case NF4CHR:
476 READ_BUF(8);
477 READ32(create->cr_specdata1);
478 READ32(create->cr_specdata2);
479 break;
480 case NF4SOCK:
481 case NF4FIFO:
482 case NF4DIR:
483 default:
484 break;
487 READ_BUF(4);
488 READ32(create->cr_namelen);
489 READ_BUF(create->cr_namelen);
490 SAVEMEM(create->cr_name, create->cr_namelen);
491 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
492 return status;
494 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
495 goto out;
497 DECODE_TAIL;
500 static inline __be32
501 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
503 DECODE_HEAD;
505 READ_BUF(sizeof(stateid_t));
506 READ32(dr->dr_stateid.si_generation);
507 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t));
509 DECODE_TAIL;
512 static inline __be32
513 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
515 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
518 static __be32
519 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
521 DECODE_HEAD;
523 READ_BUF(4);
524 READ32(link->li_namelen);
525 READ_BUF(link->li_namelen);
526 SAVEMEM(link->li_name, link->li_namelen);
527 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
528 return status;
530 DECODE_TAIL;
533 static __be32
534 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
536 DECODE_HEAD;
538 lock->lk_replay_owner = NULL;
540 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
542 READ_BUF(28);
543 READ32(lock->lk_type);
544 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
545 goto xdr_error;
546 READ32(lock->lk_reclaim);
547 READ64(lock->lk_offset);
548 READ64(lock->lk_length);
549 READ32(lock->lk_is_new);
551 if (lock->lk_is_new) {
552 READ_BUF(36);
553 READ32(lock->lk_new_open_seqid);
554 READ32(lock->lk_new_open_stateid.si_generation);
556 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
557 READ32(lock->lk_new_lock_seqid);
558 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
559 READ32(lock->lk_new_owner.len);
560 READ_BUF(lock->lk_new_owner.len);
561 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
562 } else {
563 READ_BUF(20);
564 READ32(lock->lk_old_lock_stateid.si_generation);
565 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
566 READ32(lock->lk_old_lock_seqid);
569 DECODE_TAIL;
572 static __be32
573 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
575 DECODE_HEAD;
577 READ_BUF(32);
578 READ32(lockt->lt_type);
579 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
580 goto xdr_error;
581 READ64(lockt->lt_offset);
582 READ64(lockt->lt_length);
583 COPYMEM(&lockt->lt_clientid, 8);
584 READ32(lockt->lt_owner.len);
585 READ_BUF(lockt->lt_owner.len);
586 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
588 DECODE_TAIL;
591 static __be32
592 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
594 DECODE_HEAD;
596 locku->lu_stateowner = NULL;
597 READ_BUF(24 + sizeof(stateid_t));
598 READ32(locku->lu_type);
599 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
600 goto xdr_error;
601 READ32(locku->lu_seqid);
602 READ32(locku->lu_stateid.si_generation);
603 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
604 READ64(locku->lu_offset);
605 READ64(locku->lu_length);
607 DECODE_TAIL;
610 static __be32
611 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
613 DECODE_HEAD;
615 READ_BUF(4);
616 READ32(lookup->lo_len);
617 READ_BUF(lookup->lo_len);
618 SAVEMEM(lookup->lo_name, lookup->lo_len);
619 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
620 return status;
622 DECODE_TAIL;
625 static __be32
626 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
628 DECODE_HEAD;
630 memset(open->op_bmval, 0, sizeof(open->op_bmval));
631 open->op_iattr.ia_valid = 0;
632 open->op_stateowner = NULL;
634 /* seqid, share_access, share_deny, clientid, ownerlen */
635 READ_BUF(16 + sizeof(clientid_t));
636 READ32(open->op_seqid);
637 READ32(open->op_share_access);
638 READ32(open->op_share_deny);
639 COPYMEM(&open->op_clientid, sizeof(clientid_t));
640 READ32(open->op_owner.len);
642 /* owner, open_flag */
643 READ_BUF(open->op_owner.len + 4);
644 SAVEMEM(open->op_owner.data, open->op_owner.len);
645 READ32(open->op_create);
646 switch (open->op_create) {
647 case NFS4_OPEN_NOCREATE:
648 break;
649 case NFS4_OPEN_CREATE:
650 READ_BUF(4);
651 READ32(open->op_createmode);
652 switch (open->op_createmode) {
653 case NFS4_CREATE_UNCHECKED:
654 case NFS4_CREATE_GUARDED:
655 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
656 goto out;
657 break;
658 case NFS4_CREATE_EXCLUSIVE:
659 READ_BUF(8);
660 COPYMEM(open->op_verf.data, 8);
661 break;
662 default:
663 goto xdr_error;
665 break;
666 default:
667 goto xdr_error;
670 /* open_claim */
671 READ_BUF(4);
672 READ32(open->op_claim_type);
673 switch (open->op_claim_type) {
674 case NFS4_OPEN_CLAIM_NULL:
675 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
676 READ_BUF(4);
677 READ32(open->op_fname.len);
678 READ_BUF(open->op_fname.len);
679 SAVEMEM(open->op_fname.data, open->op_fname.len);
680 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
681 return status;
682 break;
683 case NFS4_OPEN_CLAIM_PREVIOUS:
684 READ_BUF(4);
685 READ32(open->op_delegate_type);
686 break;
687 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
688 READ_BUF(sizeof(stateid_t) + 4);
689 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t));
690 READ32(open->op_fname.len);
691 READ_BUF(open->op_fname.len);
692 SAVEMEM(open->op_fname.data, open->op_fname.len);
693 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
694 return status;
695 break;
696 default:
697 goto xdr_error;
700 DECODE_TAIL;
703 static __be32
704 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
706 DECODE_HEAD;
708 open_conf->oc_stateowner = NULL;
709 READ_BUF(4 + sizeof(stateid_t));
710 READ32(open_conf->oc_req_stateid.si_generation);
711 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
712 READ32(open_conf->oc_seqid);
714 DECODE_TAIL;
717 static __be32
718 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
720 DECODE_HEAD;
722 open_down->od_stateowner = NULL;
723 READ_BUF(12 + sizeof(stateid_t));
724 READ32(open_down->od_stateid.si_generation);
725 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
726 READ32(open_down->od_seqid);
727 READ32(open_down->od_share_access);
728 READ32(open_down->od_share_deny);
730 DECODE_TAIL;
733 static __be32
734 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
736 DECODE_HEAD;
738 READ_BUF(4);
739 READ32(putfh->pf_fhlen);
740 if (putfh->pf_fhlen > NFS4_FHSIZE)
741 goto xdr_error;
742 READ_BUF(putfh->pf_fhlen);
743 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
745 DECODE_TAIL;
748 static __be32
749 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
751 DECODE_HEAD;
753 READ_BUF(sizeof(stateid_t) + 12);
754 READ32(read->rd_stateid.si_generation);
755 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
756 READ64(read->rd_offset);
757 READ32(read->rd_length);
759 DECODE_TAIL;
762 static __be32
763 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
765 DECODE_HEAD;
767 READ_BUF(24);
768 READ64(readdir->rd_cookie);
769 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
770 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
771 READ32(readdir->rd_maxcount);
772 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
773 goto out;
775 DECODE_TAIL;
778 static __be32
779 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
781 DECODE_HEAD;
783 READ_BUF(4);
784 READ32(remove->rm_namelen);
785 READ_BUF(remove->rm_namelen);
786 SAVEMEM(remove->rm_name, remove->rm_namelen);
787 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
788 return status;
790 DECODE_TAIL;
793 static __be32
794 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
796 DECODE_HEAD;
798 READ_BUF(4);
799 READ32(rename->rn_snamelen);
800 READ_BUF(rename->rn_snamelen + 4);
801 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
802 READ32(rename->rn_tnamelen);
803 READ_BUF(rename->rn_tnamelen);
804 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
805 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
806 return status;
807 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
808 return status;
810 DECODE_TAIL;
813 static __be32
814 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
816 DECODE_HEAD;
818 READ_BUF(sizeof(clientid_t));
819 COPYMEM(clientid, sizeof(clientid_t));
821 DECODE_TAIL;
824 static __be32
825 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
827 DECODE_HEAD;
829 READ_BUF(sizeof(stateid_t));
830 READ32(setattr->sa_stateid.si_generation);
831 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
832 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
833 goto out;
835 DECODE_TAIL;
838 static __be32
839 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
841 DECODE_HEAD;
843 READ_BUF(12);
844 COPYMEM(setclientid->se_verf.data, 8);
845 READ32(setclientid->se_namelen);
847 READ_BUF(setclientid->se_namelen + 8);
848 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
849 READ32(setclientid->se_callback_prog);
850 READ32(setclientid->se_callback_netid_len);
852 READ_BUF(setclientid->se_callback_netid_len + 4);
853 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
854 READ32(setclientid->se_callback_addr_len);
856 READ_BUF(setclientid->se_callback_addr_len + 4);
857 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
858 READ32(setclientid->se_callback_ident);
860 DECODE_TAIL;
863 static __be32
864 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
866 DECODE_HEAD;
868 READ_BUF(8 + sizeof(nfs4_verifier));
869 COPYMEM(&scd_c->sc_clientid, 8);
870 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
872 DECODE_TAIL;
875 /* Also used for NVERIFY */
876 static __be32
877 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
879 #if 0
880 struct nfsd4_compoundargs save = {
881 .p = argp->p,
882 .end = argp->end,
883 .rqstp = argp->rqstp,
885 u32 ve_bmval[2];
886 struct iattr ve_iattr; /* request */
887 struct nfs4_acl *ve_acl; /* request */
888 #endif
889 DECODE_HEAD;
891 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
892 goto out;
894 /* For convenience's sake, we compare raw xdr'd attributes in
895 * nfsd4_proc_verify; however we still decode here just to return
896 * correct error in case of bad xdr. */
897 #if 0
898 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
899 if (status == nfserr_inval) {
900 status = nfserrno(status);
901 goto out;
903 #endif
904 READ_BUF(4);
905 READ32(verify->ve_attrlen);
906 READ_BUF(verify->ve_attrlen);
907 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
909 DECODE_TAIL;
912 static __be32
913 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
915 int avail;
916 int v;
917 int len;
918 DECODE_HEAD;
920 READ_BUF(sizeof(stateid_opaque_t) + 20);
921 READ32(write->wr_stateid.si_generation);
922 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
923 READ64(write->wr_offset);
924 READ32(write->wr_stable_how);
925 if (write->wr_stable_how > 2)
926 goto xdr_error;
927 READ32(write->wr_buflen);
929 /* Sorry .. no magic macros for this.. *
930 * READ_BUF(write->wr_buflen);
931 * SAVEMEM(write->wr_buf, write->wr_buflen);
933 avail = (char*)argp->end - (char*)argp->p;
934 if (avail + argp->pagelen < write->wr_buflen) {
935 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__);
936 goto xdr_error;
938 argp->rqstp->rq_vec[0].iov_base = p;
939 argp->rqstp->rq_vec[0].iov_len = avail;
940 v = 0;
941 len = write->wr_buflen;
942 while (len > argp->rqstp->rq_vec[v].iov_len) {
943 len -= argp->rqstp->rq_vec[v].iov_len;
944 v++;
945 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
946 argp->pagelist++;
947 if (argp->pagelen >= PAGE_SIZE) {
948 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
949 argp->pagelen -= PAGE_SIZE;
950 } else {
951 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
952 argp->pagelen -= len;
955 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
956 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
957 argp->rqstp->rq_vec[v].iov_len = len;
958 write->wr_vlen = v+1;
960 DECODE_TAIL;
963 static __be32
964 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
966 DECODE_HEAD;
968 READ_BUF(12);
969 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
970 READ32(rlockowner->rl_owner.len);
971 READ_BUF(rlockowner->rl_owner.len);
972 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
974 DECODE_TAIL;
977 static __be32
978 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
980 DECODE_HEAD;
981 struct nfsd4_op *op;
982 int i;
985 * XXX: According to spec, we should check the tag
986 * for UTF-8 compliance. I'm postponing this for
987 * now because it seems that some clients do use
988 * binary tags.
990 READ_BUF(4);
991 READ32(argp->taglen);
992 READ_BUF(argp->taglen + 8);
993 SAVEMEM(argp->tag, argp->taglen);
994 READ32(argp->minorversion);
995 READ32(argp->opcnt);
997 if (argp->taglen > NFSD4_MAX_TAGLEN)
998 goto xdr_error;
999 if (argp->opcnt > 100)
1000 goto xdr_error;
1002 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1003 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1004 if (!argp->ops) {
1005 argp->ops = argp->iops;
1006 printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n");
1007 goto xdr_error;
1011 for (i = 0; i < argp->opcnt; i++) {
1012 op = &argp->ops[i];
1013 op->replay = NULL;
1016 * We can't use READ_BUF() here because we need to handle
1017 * a missing opcode as an OP_WRITE + 1. So we need to check
1018 * to see if we're truly at the end of our buffer or if there
1019 * is another page we need to flip to.
1022 if (argp->p == argp->end) {
1023 if (argp->pagelen < 4) {
1024 /* There isn't an opcode still on the wire */
1025 op->opnum = OP_WRITE + 1;
1026 op->status = nfserr_bad_xdr;
1027 argp->opcnt = i+1;
1028 break;
1032 * False alarm. We just hit a page boundary, but there
1033 * is still data available. Move pointer across page
1034 * boundary. *snip from READ_BUF*
1036 argp->p = page_address(argp->pagelist[0]);
1037 argp->pagelist++;
1038 if (argp->pagelen < PAGE_SIZE) {
1039 argp->end = p + (argp->pagelen>>2);
1040 argp->pagelen = 0;
1041 } else {
1042 argp->end = p + (PAGE_SIZE>>2);
1043 argp->pagelen -= PAGE_SIZE;
1046 op->opnum = ntohl(*argp->p++);
1048 switch (op->opnum) {
1049 case 2: /* Reserved operation */
1050 op->opnum = OP_ILLEGAL;
1051 if (argp->minorversion == 0)
1052 op->status = nfserr_op_illegal;
1053 else
1054 op->status = nfserr_minor_vers_mismatch;
1055 break;
1056 case OP_ACCESS:
1057 op->status = nfsd4_decode_access(argp, &op->u.access);
1058 break;
1059 case OP_CLOSE:
1060 op->status = nfsd4_decode_close(argp, &op->u.close);
1061 break;
1062 case OP_COMMIT:
1063 op->status = nfsd4_decode_commit(argp, &op->u.commit);
1064 break;
1065 case OP_CREATE:
1066 op->status = nfsd4_decode_create(argp, &op->u.create);
1067 break;
1068 case OP_DELEGRETURN:
1069 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn);
1070 break;
1071 case OP_GETATTR:
1072 op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1073 break;
1074 case OP_GETFH:
1075 op->status = nfs_ok;
1076 break;
1077 case OP_LINK:
1078 op->status = nfsd4_decode_link(argp, &op->u.link);
1079 break;
1080 case OP_LOCK:
1081 op->status = nfsd4_decode_lock(argp, &op->u.lock);
1082 break;
1083 case OP_LOCKT:
1084 op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1085 break;
1086 case OP_LOCKU:
1087 op->status = nfsd4_decode_locku(argp, &op->u.locku);
1088 break;
1089 case OP_LOOKUP:
1090 op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1091 break;
1092 case OP_LOOKUPP:
1093 op->status = nfs_ok;
1094 break;
1095 case OP_NVERIFY:
1096 op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1097 break;
1098 case OP_OPEN:
1099 op->status = nfsd4_decode_open(argp, &op->u.open);
1100 break;
1101 case OP_OPEN_CONFIRM:
1102 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1103 break;
1104 case OP_OPEN_DOWNGRADE:
1105 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1106 break;
1107 case OP_PUTFH:
1108 op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1109 break;
1110 case OP_PUTROOTFH:
1111 op->status = nfs_ok;
1112 break;
1113 case OP_READ:
1114 op->status = nfsd4_decode_read(argp, &op->u.read);
1115 break;
1116 case OP_READDIR:
1117 op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1118 break;
1119 case OP_READLINK:
1120 op->status = nfs_ok;
1121 break;
1122 case OP_REMOVE:
1123 op->status = nfsd4_decode_remove(argp, &op->u.remove);
1124 break;
1125 case OP_RENAME:
1126 op->status = nfsd4_decode_rename(argp, &op->u.rename);
1127 break;
1128 case OP_RESTOREFH:
1129 op->status = nfs_ok;
1130 break;
1131 case OP_RENEW:
1132 op->status = nfsd4_decode_renew(argp, &op->u.renew);
1133 break;
1134 case OP_SAVEFH:
1135 op->status = nfs_ok;
1136 break;
1137 case OP_SETATTR:
1138 op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1139 break;
1140 case OP_SETCLIENTID:
1141 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1142 break;
1143 case OP_SETCLIENTID_CONFIRM:
1144 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1145 break;
1146 case OP_VERIFY:
1147 op->status = nfsd4_decode_verify(argp, &op->u.verify);
1148 break;
1149 case OP_WRITE:
1150 op->status = nfsd4_decode_write(argp, &op->u.write);
1151 break;
1152 case OP_RELEASE_LOCKOWNER:
1153 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1154 break;
1155 default:
1156 op->opnum = OP_ILLEGAL;
1157 op->status = nfserr_op_illegal;
1158 break;
1161 if (op->status) {
1162 argp->opcnt = i+1;
1163 break;
1167 DECODE_TAIL;
1170 * END OF "GENERIC" DECODE ROUTINES.
1174 * START OF "GENERIC" ENCODE ROUTINES.
1175 * These may look a little ugly since they are imported from a "generic"
1176 * set of XDR encode/decode routines which are intended to be shared by
1177 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1179 * If the pain of reading these is too great, it should be a straightforward
1180 * task to translate them into Linux-specific versions which are more
1181 * consistent with the style used in NFSv2/v3...
1183 #define ENCODE_HEAD __be32 *p
1185 #define WRITE32(n) *p++ = htonl(n)
1186 #define WRITE64(n) do { \
1187 *p++ = htonl((u32)((n) >> 32)); \
1188 *p++ = htonl((u32)(n)); \
1189 } while (0)
1190 #define WRITEMEM(ptr,nbytes) do { \
1191 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1192 memcpy(p, ptr, nbytes); \
1193 p += XDR_QUADLEN(nbytes); \
1194 } while (0)
1195 #define WRITECINFO(c) do { \
1196 *p++ = htonl(c.atomic); \
1197 *p++ = htonl(c.before_ctime_sec); \
1198 *p++ = htonl(c.before_ctime_nsec); \
1199 *p++ = htonl(c.after_ctime_sec); \
1200 *p++ = htonl(c.after_ctime_nsec); \
1201 } while (0)
1203 #define RESERVE_SPACE(nbytes) do { \
1204 p = resp->p; \
1205 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1206 } while (0)
1207 #define ADJUST_ARGS() resp->p = p
1210 * Header routine to setup seqid operation replay cache
1212 #define ENCODE_SEQID_OP_HEAD \
1213 __be32 *p; \
1214 __be32 *save; \
1216 save = resp->p;
1219 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1220 * is where sequence id's are incremented, and the replay cache is filled.
1221 * Note that we increment sequence id's here, at the last moment, so we're sure
1222 * we know whether the error to be returned is a sequence id mutating error.
1225 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1226 if (seqid_mutating_err(nfserr) && stateowner) { \
1227 stateowner->so_seqid++; \
1228 stateowner->so_replay.rp_status = nfserr; \
1229 stateowner->so_replay.rp_buflen = \
1230 (((char *)(resp)->p - (char *)save)); \
1231 memcpy(stateowner->so_replay.rp_buf, save, \
1232 stateowner->so_replay.rp_buflen); \
1233 } } while (0);
1235 /* Encode as an array of strings the string given with components
1236 * seperated @sep.
1238 static __be32 nfsd4_encode_components(char sep, char *components,
1239 __be32 **pp, int *buflen)
1241 __be32 *p = *pp;
1242 __be32 *countp = p;
1243 int strlen, count=0;
1244 char *str, *end;
1246 dprintk("nfsd4_encode_components(%s)\n", components);
1247 if ((*buflen -= 4) < 0)
1248 return nfserr_resource;
1249 WRITE32(0); /* We will fill this in with @count later */
1250 end = str = components;
1251 while (*end) {
1252 for (; *end && (*end != sep); end++)
1253 ; /* Point to end of component */
1254 strlen = end - str;
1255 if (strlen) {
1256 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1257 return nfserr_resource;
1258 WRITE32(strlen);
1259 WRITEMEM(str, strlen);
1260 count++;
1262 else
1263 end++;
1264 str = end;
1266 *pp = p;
1267 p = countp;
1268 WRITE32(count);
1269 return 0;
1273 * encode a location element of a fs_locations structure
1275 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1276 __be32 **pp, int *buflen)
1278 __be32 status;
1279 __be32 *p = *pp;
1281 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1282 if (status)
1283 return status;
1284 status = nfsd4_encode_components('/', location->path, &p, buflen);
1285 if (status)
1286 return status;
1287 *pp = p;
1288 return 0;
1292 * Return the path to an export point in the pseudo filesystem namespace
1293 * Returned string is safe to use as long as the caller holds a reference
1294 * to @exp.
1296 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1298 struct svc_fh tmp_fh;
1299 char *path, *rootpath;
1301 fh_init(&tmp_fh, NFS4_FHSIZE);
1302 *stat = exp_pseudoroot(rqstp->rq_client, &tmp_fh, &rqstp->rq_chandle);
1303 if (*stat)
1304 return NULL;
1305 rootpath = tmp_fh.fh_export->ex_path;
1307 path = exp->ex_path;
1309 if (strncmp(path, rootpath, strlen(rootpath))) {
1310 printk("nfsd: fs_locations failed;"
1311 "%s is not contained in %s\n", path, rootpath);
1312 *stat = nfserr_notsupp;
1313 return NULL;
1316 return path + strlen(rootpath);
1320 * encode a fs_locations structure
1322 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1323 struct svc_export *exp,
1324 __be32 **pp, int *buflen)
1326 __be32 status;
1327 int i;
1328 __be32 *p = *pp;
1329 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1330 char *root = nfsd4_path(rqstp, exp, &status);
1332 if (status)
1333 return status;
1334 status = nfsd4_encode_components('/', root, &p, buflen);
1335 if (status)
1336 return status;
1337 if ((*buflen -= 4) < 0)
1338 return nfserr_resource;
1339 WRITE32(fslocs->locations_count);
1340 for (i=0; i<fslocs->locations_count; i++) {
1341 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1342 &p, buflen);
1343 if (status)
1344 return status;
1346 *pp = p;
1347 return 0;
1350 static u32 nfs4_ftypes[16] = {
1351 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1352 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1353 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1354 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1357 static __be32
1358 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1359 __be32 **p, int *buflen)
1361 int status;
1363 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1364 return nfserr_resource;
1365 if (whotype != NFS4_ACL_WHO_NAMED)
1366 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1367 else if (group)
1368 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1369 else
1370 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1371 if (status < 0)
1372 return nfserrno(status);
1373 *p = xdr_encode_opaque(*p, NULL, status);
1374 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1375 BUG_ON(*buflen < 0);
1376 return 0;
1379 static inline __be32
1380 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1382 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1385 static inline __be32
1386 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1388 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1391 static inline __be32
1392 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1393 __be32 **p, int *buflen)
1395 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1398 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1399 FATTR4_WORD0_RDATTR_ERROR)
1400 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1402 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1404 /* As per referral draft: */
1405 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1406 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1407 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1408 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1409 *rdattr_err = NFSERR_MOVED;
1410 else
1411 return nfserr_moved;
1413 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1414 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1415 return 0;
1419 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1420 * ourselves.
1422 * @countp is the buffer size in _words_; upon successful return this becomes
1423 * replaced with the number of words written.
1425 __be32
1426 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1427 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1428 struct svc_rqst *rqstp)
1430 u32 bmval0 = bmval[0];
1431 u32 bmval1 = bmval[1];
1432 struct kstat stat;
1433 struct svc_fh tempfh;
1434 struct kstatfs statfs;
1435 int buflen = *countp << 2;
1436 __be32 *attrlenp;
1437 u32 dummy;
1438 u64 dummy64;
1439 u32 rdattr_err = 0;
1440 __be32 *p = buffer;
1441 __be32 status;
1442 int err;
1443 int aclsupport = 0;
1444 struct nfs4_acl *acl = NULL;
1446 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1447 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1448 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1450 if (exp->ex_fslocs.migrated) {
1451 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1452 if (status)
1453 goto out;
1456 err = vfs_getattr(exp->ex_mnt, dentry, &stat);
1457 if (err)
1458 goto out_nfserr;
1459 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
1460 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1461 FATTR4_WORD1_SPACE_TOTAL))) {
1462 err = vfs_statfs(dentry, &statfs);
1463 if (err)
1464 goto out_nfserr;
1466 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1467 fh_init(&tempfh, NFS4_FHSIZE);
1468 status = fh_compose(&tempfh, exp, dentry, NULL);
1469 if (status)
1470 goto out;
1471 fhp = &tempfh;
1473 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1474 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1475 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1476 aclsupport = (err == 0);
1477 if (bmval0 & FATTR4_WORD0_ACL) {
1478 if (err == -EOPNOTSUPP)
1479 bmval0 &= ~FATTR4_WORD0_ACL;
1480 else if (err == -EINVAL) {
1481 status = nfserr_attrnotsupp;
1482 goto out;
1483 } else if (err != 0)
1484 goto out_nfserr;
1487 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1488 if (exp->ex_fslocs.locations == NULL) {
1489 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1492 if ((buflen -= 16) < 0)
1493 goto out_resource;
1495 WRITE32(2);
1496 WRITE32(bmval0);
1497 WRITE32(bmval1);
1498 attrlenp = p++; /* to be backfilled later */
1500 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1501 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1502 if ((buflen -= 12) < 0)
1503 goto out_resource;
1504 if (!aclsupport)
1505 word0 &= ~FATTR4_WORD0_ACL;
1506 if (!exp->ex_fslocs.locations)
1507 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1508 WRITE32(2);
1509 WRITE32(word0);
1510 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1512 if (bmval0 & FATTR4_WORD0_TYPE) {
1513 if ((buflen -= 4) < 0)
1514 goto out_resource;
1515 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1516 if (dummy == NF4BAD)
1517 goto out_serverfault;
1518 WRITE32(dummy);
1520 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1521 if ((buflen -= 4) < 0)
1522 goto out_resource;
1523 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1524 WRITE32(NFS4_FH_PERSISTENT);
1525 else
1526 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1528 if (bmval0 & FATTR4_WORD0_CHANGE) {
1530 * Note: This _must_ be consistent with the scheme for writing
1531 * change_info, so any changes made here must be reflected there
1532 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1533 * macro above.)
1535 if ((buflen -= 8) < 0)
1536 goto out_resource;
1537 WRITE32(stat.ctime.tv_sec);
1538 WRITE32(stat.ctime.tv_nsec);
1540 if (bmval0 & FATTR4_WORD0_SIZE) {
1541 if ((buflen -= 8) < 0)
1542 goto out_resource;
1543 WRITE64(stat.size);
1545 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1546 if ((buflen -= 4) < 0)
1547 goto out_resource;
1548 WRITE32(1);
1550 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1551 if ((buflen -= 4) < 0)
1552 goto out_resource;
1553 WRITE32(1);
1555 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1556 if ((buflen -= 4) < 0)
1557 goto out_resource;
1558 WRITE32(0);
1560 if (bmval0 & FATTR4_WORD0_FSID) {
1561 if ((buflen -= 16) < 0)
1562 goto out_resource;
1563 if (exp->ex_fslocs.migrated) {
1564 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1565 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1566 } else switch(fsid_source(fhp)) {
1567 case FSIDSOURCE_FSID:
1568 WRITE64((u64)exp->ex_fsid);
1569 WRITE64((u64)0);
1570 break;
1571 case FSIDSOURCE_DEV:
1572 WRITE32(0);
1573 WRITE32(MAJOR(stat.dev));
1574 WRITE32(0);
1575 WRITE32(MINOR(stat.dev));
1576 break;
1577 case FSIDSOURCE_UUID:
1578 WRITEMEM(exp->ex_uuid, 16);
1579 break;
1582 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1583 if ((buflen -= 4) < 0)
1584 goto out_resource;
1585 WRITE32(0);
1587 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1588 if ((buflen -= 4) < 0)
1589 goto out_resource;
1590 WRITE32(NFSD_LEASE_TIME);
1592 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1593 if ((buflen -= 4) < 0)
1594 goto out_resource;
1595 WRITE32(rdattr_err);
1597 if (bmval0 & FATTR4_WORD0_ACL) {
1598 struct nfs4_ace *ace;
1599 struct list_head *h;
1601 if (acl == NULL) {
1602 if ((buflen -= 4) < 0)
1603 goto out_resource;
1605 WRITE32(0);
1606 goto out_acl;
1608 if ((buflen -= 4) < 0)
1609 goto out_resource;
1610 WRITE32(acl->naces);
1612 list_for_each(h, &acl->ace_head) {
1613 ace = list_entry(h, struct nfs4_ace, l_ace);
1615 if ((buflen -= 4*3) < 0)
1616 goto out_resource;
1617 WRITE32(ace->type);
1618 WRITE32(ace->flag);
1619 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1620 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1621 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1622 &p, &buflen);
1623 if (status == nfserr_resource)
1624 goto out_resource;
1625 if (status)
1626 goto out;
1629 out_acl:
1630 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1631 if ((buflen -= 4) < 0)
1632 goto out_resource;
1633 WRITE32(aclsupport ?
1634 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1636 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1637 if ((buflen -= 4) < 0)
1638 goto out_resource;
1639 WRITE32(1);
1641 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1642 if ((buflen -= 4) < 0)
1643 goto out_resource;
1644 WRITE32(1);
1646 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1647 if ((buflen -= 4) < 0)
1648 goto out_resource;
1649 WRITE32(1);
1651 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1652 if ((buflen -= 4) < 0)
1653 goto out_resource;
1654 WRITE32(1);
1656 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1657 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1658 if (buflen < 0)
1659 goto out_resource;
1660 WRITE32(fhp->fh_handle.fh_size);
1661 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1663 if (bmval0 & FATTR4_WORD0_FILEID) {
1664 if ((buflen -= 8) < 0)
1665 goto out_resource;
1666 WRITE64((u64) stat.ino);
1668 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1669 if ((buflen -= 8) < 0)
1670 goto out_resource;
1671 WRITE64((u64) statfs.f_ffree);
1673 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1674 if ((buflen -= 8) < 0)
1675 goto out_resource;
1676 WRITE64((u64) statfs.f_ffree);
1678 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1679 if ((buflen -= 8) < 0)
1680 goto out_resource;
1681 WRITE64((u64) statfs.f_files);
1683 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1684 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1685 if (status == nfserr_resource)
1686 goto out_resource;
1687 if (status)
1688 goto out;
1690 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1691 if ((buflen -= 4) < 0)
1692 goto out_resource;
1693 WRITE32(1);
1695 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1696 if ((buflen -= 8) < 0)
1697 goto out_resource;
1698 WRITE64(~(u64)0);
1700 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1701 if ((buflen -= 4) < 0)
1702 goto out_resource;
1703 WRITE32(255);
1705 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1706 if ((buflen -= 4) < 0)
1707 goto out_resource;
1708 WRITE32(~(u32) 0);
1710 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1711 if ((buflen -= 8) < 0)
1712 goto out_resource;
1713 WRITE64((u64) svc_max_payload(rqstp));
1715 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1716 if ((buflen -= 8) < 0)
1717 goto out_resource;
1718 WRITE64((u64) svc_max_payload(rqstp));
1720 if (bmval1 & FATTR4_WORD1_MODE) {
1721 if ((buflen -= 4) < 0)
1722 goto out_resource;
1723 WRITE32(stat.mode & S_IALLUGO);
1725 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1726 if ((buflen -= 4) < 0)
1727 goto out_resource;
1728 WRITE32(1);
1730 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1731 if ((buflen -= 4) < 0)
1732 goto out_resource;
1733 WRITE32(stat.nlink);
1735 if (bmval1 & FATTR4_WORD1_OWNER) {
1736 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1737 if (status == nfserr_resource)
1738 goto out_resource;
1739 if (status)
1740 goto out;
1742 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1743 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1744 if (status == nfserr_resource)
1745 goto out_resource;
1746 if (status)
1747 goto out;
1749 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1750 if ((buflen -= 8) < 0)
1751 goto out_resource;
1752 WRITE32((u32) MAJOR(stat.rdev));
1753 WRITE32((u32) MINOR(stat.rdev));
1755 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1756 if ((buflen -= 8) < 0)
1757 goto out_resource;
1758 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1759 WRITE64(dummy64);
1761 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1762 if ((buflen -= 8) < 0)
1763 goto out_resource;
1764 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1765 WRITE64(dummy64);
1767 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1768 if ((buflen -= 8) < 0)
1769 goto out_resource;
1770 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1771 WRITE64(dummy64);
1773 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1774 if ((buflen -= 8) < 0)
1775 goto out_resource;
1776 dummy64 = (u64)stat.blocks << 9;
1777 WRITE64(dummy64);
1779 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1780 if ((buflen -= 12) < 0)
1781 goto out_resource;
1782 WRITE32(0);
1783 WRITE32(stat.atime.tv_sec);
1784 WRITE32(stat.atime.tv_nsec);
1786 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1787 if ((buflen -= 12) < 0)
1788 goto out_resource;
1789 WRITE32(0);
1790 WRITE32(1);
1791 WRITE32(0);
1793 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1794 if ((buflen -= 12) < 0)
1795 goto out_resource;
1796 WRITE32(0);
1797 WRITE32(stat.ctime.tv_sec);
1798 WRITE32(stat.ctime.tv_nsec);
1800 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1801 if ((buflen -= 12) < 0)
1802 goto out_resource;
1803 WRITE32(0);
1804 WRITE32(stat.mtime.tv_sec);
1805 WRITE32(stat.mtime.tv_nsec);
1807 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1808 struct dentry *mnt_pnt, *mnt_root;
1810 if ((buflen -= 8) < 0)
1811 goto out_resource;
1812 mnt_root = exp->ex_mnt->mnt_root;
1813 if (mnt_root->d_inode == dentry->d_inode) {
1814 mnt_pnt = exp->ex_mnt->mnt_mountpoint;
1815 WRITE64((u64) mnt_pnt->d_inode->i_ino);
1816 } else
1817 WRITE64((u64) stat.ino);
1819 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1820 *countp = p - buffer;
1821 status = nfs_ok;
1823 out:
1824 nfs4_acl_free(acl);
1825 if (fhp == &tempfh)
1826 fh_put(&tempfh);
1827 return status;
1828 out_nfserr:
1829 status = nfserrno(err);
1830 goto out;
1831 out_resource:
1832 *countp = 0;
1833 status = nfserr_resource;
1834 goto out;
1835 out_serverfault:
1836 status = nfserr_serverfault;
1837 goto out;
1840 static __be32
1841 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
1842 const char *name, int namlen, __be32 *p, int *buflen)
1844 struct svc_export *exp = cd->rd_fhp->fh_export;
1845 struct dentry *dentry;
1846 __be32 nfserr;
1848 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1849 if (IS_ERR(dentry))
1850 return nfserrno(PTR_ERR(dentry));
1852 exp_get(exp);
1853 if (d_mountpoint(dentry)) {
1854 int err;
1856 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
1857 if (err) {
1858 nfserr = nfserrno(err);
1859 goto out_put;
1863 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
1864 cd->rd_rqstp);
1865 out_put:
1866 dput(dentry);
1867 exp_put(exp);
1868 return nfserr;
1871 static __be32 *
1872 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1874 __be32 *attrlenp;
1876 if (buflen < 6)
1877 return NULL;
1878 *p++ = htonl(2);
1879 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
1880 *p++ = htonl(0); /* bmval1 */
1882 attrlenp = p++;
1883 *p++ = nfserr; /* no htonl */
1884 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1885 return p;
1888 static int
1889 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
1890 loff_t offset, u64 ino, unsigned int d_type)
1892 struct readdir_cd *ccd = ccdv;
1893 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1894 int buflen;
1895 __be32 *p = cd->buffer;
1896 __be32 nfserr = nfserr_toosmall;
1898 /* In nfsv4, "." and ".." never make it onto the wire.. */
1899 if (name && isdotent(name, namlen)) {
1900 cd->common.err = nfs_ok;
1901 return 0;
1904 if (cd->offset)
1905 xdr_encode_hyper(cd->offset, (u64) offset);
1907 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1908 if (buflen < 0)
1909 goto fail;
1911 *p++ = xdr_one; /* mark entry present */
1912 cd->offset = p; /* remember pointer */
1913 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1914 p = xdr_encode_array(p, name, namlen); /* name length & name */
1916 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
1917 switch (nfserr) {
1918 case nfs_ok:
1919 p += buflen;
1920 break;
1921 case nfserr_resource:
1922 nfserr = nfserr_toosmall;
1923 goto fail;
1924 case nfserr_dropit:
1925 goto fail;
1926 default:
1928 * If the client requested the RDATTR_ERROR attribute,
1929 * we stuff the error code into this attribute
1930 * and continue. If this attribute was not requested,
1931 * then in accordance with the spec, we fail the
1932 * entire READDIR operation(!)
1934 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
1935 goto fail;
1936 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
1937 if (p == NULL) {
1938 nfserr = nfserr_toosmall;
1939 goto fail;
1942 cd->buflen -= (p - cd->buffer);
1943 cd->buffer = p;
1944 cd->common.err = nfs_ok;
1945 return 0;
1946 fail:
1947 cd->common.err = nfserr;
1948 return -EINVAL;
1951 static void
1952 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1954 ENCODE_HEAD;
1956 if (!nfserr) {
1957 RESERVE_SPACE(8);
1958 WRITE32(access->ac_supported);
1959 WRITE32(access->ac_resp_access);
1960 ADJUST_ARGS();
1964 static void
1965 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1967 ENCODE_SEQID_OP_HEAD;
1969 if (!nfserr) {
1970 RESERVE_SPACE(sizeof(stateid_t));
1971 WRITE32(close->cl_stateid.si_generation);
1972 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
1973 ADJUST_ARGS();
1975 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
1979 static void
1980 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1982 ENCODE_HEAD;
1984 if (!nfserr) {
1985 RESERVE_SPACE(8);
1986 WRITEMEM(commit->co_verf.data, 8);
1987 ADJUST_ARGS();
1991 static void
1992 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1994 ENCODE_HEAD;
1996 if (!nfserr) {
1997 RESERVE_SPACE(32);
1998 WRITECINFO(create->cr_cinfo);
1999 WRITE32(2);
2000 WRITE32(create->cr_bmval[0]);
2001 WRITE32(create->cr_bmval[1]);
2002 ADJUST_ARGS();
2006 static __be32
2007 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2009 struct svc_fh *fhp = getattr->ga_fhp;
2010 int buflen;
2012 if (nfserr)
2013 return nfserr;
2015 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2016 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2017 resp->p, &buflen, getattr->ga_bmval,
2018 resp->rqstp);
2019 if (!nfserr)
2020 resp->p += buflen;
2021 return nfserr;
2024 static void
2025 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh *fhp)
2027 unsigned int len;
2028 ENCODE_HEAD;
2030 if (!nfserr) {
2031 len = fhp->fh_handle.fh_size;
2032 RESERVE_SPACE(len + 4);
2033 WRITE32(len);
2034 WRITEMEM(&fhp->fh_handle.fh_base, len);
2035 ADJUST_ARGS();
2040 * Including all fields other than the name, a LOCK4denied structure requires
2041 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2043 static void
2044 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2046 ENCODE_HEAD;
2048 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2049 WRITE64(ld->ld_start);
2050 WRITE64(ld->ld_length);
2051 WRITE32(ld->ld_type);
2052 if (ld->ld_sop) {
2053 WRITEMEM(&ld->ld_clientid, 8);
2054 WRITE32(ld->ld_sop->so_owner.len);
2055 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2056 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2057 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2058 WRITE64((u64)0); /* clientid */
2059 WRITE32(0); /* length of owner name */
2061 ADJUST_ARGS();
2064 static void
2065 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2067 ENCODE_SEQID_OP_HEAD;
2069 if (!nfserr) {
2070 RESERVE_SPACE(4 + sizeof(stateid_t));
2071 WRITE32(lock->lk_resp_stateid.si_generation);
2072 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2073 ADJUST_ARGS();
2074 } else if (nfserr == nfserr_denied)
2075 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2077 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2080 static void
2081 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2083 if (nfserr == nfserr_denied)
2084 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2087 static void
2088 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2090 ENCODE_SEQID_OP_HEAD;
2092 if (!nfserr) {
2093 RESERVE_SPACE(sizeof(stateid_t));
2094 WRITE32(locku->lu_stateid.si_generation);
2095 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
2096 ADJUST_ARGS();
2099 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2103 static void
2104 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2106 ENCODE_HEAD;
2108 if (!nfserr) {
2109 RESERVE_SPACE(20);
2110 WRITECINFO(link->li_cinfo);
2111 ADJUST_ARGS();
2116 static void
2117 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2119 ENCODE_SEQID_OP_HEAD;
2121 if (nfserr)
2122 goto out;
2124 RESERVE_SPACE(36 + sizeof(stateid_t));
2125 WRITE32(open->op_stateid.si_generation);
2126 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
2127 WRITECINFO(open->op_cinfo);
2128 WRITE32(open->op_rflags);
2129 WRITE32(2);
2130 WRITE32(open->op_bmval[0]);
2131 WRITE32(open->op_bmval[1]);
2132 WRITE32(open->op_delegate_type);
2133 ADJUST_ARGS();
2135 switch (open->op_delegate_type) {
2136 case NFS4_OPEN_DELEGATE_NONE:
2137 break;
2138 case NFS4_OPEN_DELEGATE_READ:
2139 RESERVE_SPACE(20 + sizeof(stateid_t));
2140 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
2141 WRITE32(open->op_recall);
2144 * TODO: ACE's in delegations
2146 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2147 WRITE32(0);
2148 WRITE32(0);
2149 WRITE32(0); /* XXX: is NULL principal ok? */
2150 ADJUST_ARGS();
2151 break;
2152 case NFS4_OPEN_DELEGATE_WRITE:
2153 RESERVE_SPACE(32 + sizeof(stateid_t));
2154 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
2155 WRITE32(0);
2158 * TODO: space_limit's in delegations
2160 WRITE32(NFS4_LIMIT_SIZE);
2161 WRITE32(~(u32)0);
2162 WRITE32(~(u32)0);
2165 * TODO: ACE's in delegations
2167 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2168 WRITE32(0);
2169 WRITE32(0);
2170 WRITE32(0); /* XXX: is NULL principal ok? */
2171 ADJUST_ARGS();
2172 break;
2173 default:
2174 BUG();
2176 /* XXX save filehandle here */
2177 out:
2178 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2181 static void
2182 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2184 ENCODE_SEQID_OP_HEAD;
2186 if (!nfserr) {
2187 RESERVE_SPACE(sizeof(stateid_t));
2188 WRITE32(oc->oc_resp_stateid.si_generation);
2189 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2190 ADJUST_ARGS();
2193 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2196 static void
2197 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2199 ENCODE_SEQID_OP_HEAD;
2201 if (!nfserr) {
2202 RESERVE_SPACE(sizeof(stateid_t));
2203 WRITE32(od->od_stateid.si_generation);
2204 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2205 ADJUST_ARGS();
2208 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2211 static __be32
2212 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2213 struct nfsd4_read *read)
2215 u32 eof;
2216 int v, pn;
2217 unsigned long maxcount;
2218 long len;
2219 ENCODE_HEAD;
2221 if (nfserr)
2222 return nfserr;
2223 if (resp->xbuf->page_len)
2224 return nfserr_resource;
2226 RESERVE_SPACE(8); /* eof flag and byte count */
2228 maxcount = svc_max_payload(resp->rqstp);
2229 if (maxcount > read->rd_length)
2230 maxcount = read->rd_length;
2232 len = maxcount;
2233 v = 0;
2234 while (len > 0) {
2235 pn = resp->rqstp->rq_resused++;
2236 resp->rqstp->rq_vec[v].iov_base =
2237 page_address(resp->rqstp->rq_respages[pn]);
2238 resp->rqstp->rq_vec[v].iov_len =
2239 len < PAGE_SIZE ? len : PAGE_SIZE;
2240 v++;
2241 len -= PAGE_SIZE;
2243 read->rd_vlen = v;
2245 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2246 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2247 &maxcount);
2249 if (nfserr == nfserr_symlink)
2250 nfserr = nfserr_inval;
2251 if (nfserr)
2252 return nfserr;
2253 eof = (read->rd_offset + maxcount >=
2254 read->rd_fhp->fh_dentry->d_inode->i_size);
2256 WRITE32(eof);
2257 WRITE32(maxcount);
2258 ADJUST_ARGS();
2259 resp->xbuf->head[0].iov_len = (char*)p
2260 - (char*)resp->xbuf->head[0].iov_base;
2261 resp->xbuf->page_len = maxcount;
2263 /* Use rest of head for padding and remaining ops: */
2264 resp->xbuf->tail[0].iov_base = p;
2265 resp->xbuf->tail[0].iov_len = 0;
2266 if (maxcount&3) {
2267 RESERVE_SPACE(4);
2268 WRITE32(0);
2269 resp->xbuf->tail[0].iov_base += maxcount&3;
2270 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2271 ADJUST_ARGS();
2273 return 0;
2276 static __be32
2277 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2279 int maxcount;
2280 char *page;
2281 ENCODE_HEAD;
2283 if (nfserr)
2284 return nfserr;
2285 if (resp->xbuf->page_len)
2286 return nfserr_resource;
2288 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2290 maxcount = PAGE_SIZE;
2291 RESERVE_SPACE(4);
2294 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2295 * if they would overflow the buffer. Is this kosher in NFSv4? If
2296 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2297 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2299 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2300 if (nfserr == nfserr_isdir)
2301 return nfserr_inval;
2302 if (nfserr)
2303 return nfserr;
2305 WRITE32(maxcount);
2306 ADJUST_ARGS();
2307 resp->xbuf->head[0].iov_len = (char*)p
2308 - (char*)resp->xbuf->head[0].iov_base;
2309 resp->xbuf->page_len = maxcount;
2311 /* Use rest of head for padding and remaining ops: */
2312 resp->xbuf->tail[0].iov_base = p;
2313 resp->xbuf->tail[0].iov_len = 0;
2314 if (maxcount&3) {
2315 RESERVE_SPACE(4);
2316 WRITE32(0);
2317 resp->xbuf->tail[0].iov_base += maxcount&3;
2318 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2319 ADJUST_ARGS();
2321 return 0;
2324 static __be32
2325 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2327 int maxcount;
2328 loff_t offset;
2329 __be32 *page, *savep, *tailbase;
2330 ENCODE_HEAD;
2332 if (nfserr)
2333 return nfserr;
2334 if (resp->xbuf->page_len)
2335 return nfserr_resource;
2337 RESERVE_SPACE(8); /* verifier */
2338 savep = p;
2340 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2341 WRITE32(0);
2342 WRITE32(0);
2343 ADJUST_ARGS();
2344 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2345 tailbase = p;
2347 maxcount = PAGE_SIZE;
2348 if (maxcount > readdir->rd_maxcount)
2349 maxcount = readdir->rd_maxcount;
2352 * Convert from bytes to words, account for the two words already
2353 * written, make sure to leave two words at the end for the next
2354 * pointer and eof field.
2356 maxcount = (maxcount >> 2) - 4;
2357 if (maxcount < 0) {
2358 nfserr = nfserr_toosmall;
2359 goto err_no_verf;
2362 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2363 readdir->common.err = 0;
2364 readdir->buflen = maxcount;
2365 readdir->buffer = page;
2366 readdir->offset = NULL;
2368 offset = readdir->rd_cookie;
2369 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2370 &offset,
2371 &readdir->common, nfsd4_encode_dirent);
2372 if (nfserr == nfs_ok &&
2373 readdir->common.err == nfserr_toosmall &&
2374 readdir->buffer == page)
2375 nfserr = nfserr_toosmall;
2376 if (nfserr == nfserr_symlink)
2377 nfserr = nfserr_notdir;
2378 if (nfserr)
2379 goto err_no_verf;
2381 if (readdir->offset)
2382 xdr_encode_hyper(readdir->offset, offset);
2384 p = readdir->buffer;
2385 *p++ = 0; /* no more entries */
2386 *p++ = htonl(readdir->common.err == nfserr_eof);
2387 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2388 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2390 /* Use rest of head for padding and remaining ops: */
2391 resp->xbuf->tail[0].iov_base = tailbase;
2392 resp->xbuf->tail[0].iov_len = 0;
2393 resp->p = resp->xbuf->tail[0].iov_base;
2394 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2396 return 0;
2397 err_no_verf:
2398 p = savep;
2399 ADJUST_ARGS();
2400 return nfserr;
2403 static void
2404 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2406 ENCODE_HEAD;
2408 if (!nfserr) {
2409 RESERVE_SPACE(20);
2410 WRITECINFO(remove->rm_cinfo);
2411 ADJUST_ARGS();
2415 static void
2416 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2418 ENCODE_HEAD;
2420 if (!nfserr) {
2421 RESERVE_SPACE(40);
2422 WRITECINFO(rename->rn_sinfo);
2423 WRITECINFO(rename->rn_tinfo);
2424 ADJUST_ARGS();
2429 * The SETATTR encode routine is special -- it always encodes a bitmap,
2430 * regardless of the error status.
2432 static void
2433 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2435 ENCODE_HEAD;
2437 RESERVE_SPACE(12);
2438 if (nfserr) {
2439 WRITE32(2);
2440 WRITE32(0);
2441 WRITE32(0);
2443 else {
2444 WRITE32(2);
2445 WRITE32(setattr->sa_bmval[0]);
2446 WRITE32(setattr->sa_bmval[1]);
2448 ADJUST_ARGS();
2451 static void
2452 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2454 ENCODE_HEAD;
2456 if (!nfserr) {
2457 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2458 WRITEMEM(&scd->se_clientid, 8);
2459 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2460 ADJUST_ARGS();
2462 else if (nfserr == nfserr_clid_inuse) {
2463 RESERVE_SPACE(8);
2464 WRITE32(0);
2465 WRITE32(0);
2466 ADJUST_ARGS();
2470 static void
2471 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2473 ENCODE_HEAD;
2475 if (!nfserr) {
2476 RESERVE_SPACE(16);
2477 WRITE32(write->wr_bytes_written);
2478 WRITE32(write->wr_how_written);
2479 WRITEMEM(write->wr_verifier.data, 8);
2480 ADJUST_ARGS();
2484 void
2485 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2487 __be32 *statp;
2488 ENCODE_HEAD;
2490 RESERVE_SPACE(8);
2491 WRITE32(op->opnum);
2492 statp = p++; /* to be backfilled at the end */
2493 ADJUST_ARGS();
2495 switch (op->opnum) {
2496 case OP_ACCESS:
2497 nfsd4_encode_access(resp, op->status, &op->u.access);
2498 break;
2499 case OP_CLOSE:
2500 nfsd4_encode_close(resp, op->status, &op->u.close);
2501 break;
2502 case OP_COMMIT:
2503 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2504 break;
2505 case OP_CREATE:
2506 nfsd4_encode_create(resp, op->status, &op->u.create);
2507 break;
2508 case OP_DELEGRETURN:
2509 break;
2510 case OP_GETATTR:
2511 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2512 break;
2513 case OP_GETFH:
2514 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2515 break;
2516 case OP_LINK:
2517 nfsd4_encode_link(resp, op->status, &op->u.link);
2518 break;
2519 case OP_LOCK:
2520 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2521 break;
2522 case OP_LOCKT:
2523 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2524 break;
2525 case OP_LOCKU:
2526 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2527 break;
2528 case OP_LOOKUP:
2529 break;
2530 case OP_LOOKUPP:
2531 break;
2532 case OP_NVERIFY:
2533 break;
2534 case OP_OPEN:
2535 nfsd4_encode_open(resp, op->status, &op->u.open);
2536 break;
2537 case OP_OPEN_CONFIRM:
2538 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2539 break;
2540 case OP_OPEN_DOWNGRADE:
2541 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2542 break;
2543 case OP_PUTFH:
2544 break;
2545 case OP_PUTROOTFH:
2546 break;
2547 case OP_READ:
2548 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2549 break;
2550 case OP_READDIR:
2551 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2552 break;
2553 case OP_READLINK:
2554 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2555 break;
2556 case OP_REMOVE:
2557 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2558 break;
2559 case OP_RENAME:
2560 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2561 break;
2562 case OP_RENEW:
2563 break;
2564 case OP_RESTOREFH:
2565 break;
2566 case OP_SAVEFH:
2567 break;
2568 case OP_SETATTR:
2569 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2570 break;
2571 case OP_SETCLIENTID:
2572 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2573 break;
2574 case OP_SETCLIENTID_CONFIRM:
2575 break;
2576 case OP_VERIFY:
2577 break;
2578 case OP_WRITE:
2579 nfsd4_encode_write(resp, op->status, &op->u.write);
2580 break;
2581 case OP_RELEASE_LOCKOWNER:
2582 break;
2583 default:
2584 break;
2588 * Note: We write the status directly, instead of using WRITE32(),
2589 * since it is already in network byte order.
2591 *statp = op->status;
2595 * Encode the reply stored in the stateowner reply cache
2597 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2598 * previously sent already encoded operation.
2600 * called with nfs4_lock_state() held
2602 void
2603 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2605 ENCODE_HEAD;
2606 struct nfs4_replay *rp = op->replay;
2608 BUG_ON(!rp);
2610 RESERVE_SPACE(8);
2611 WRITE32(op->opnum);
2612 *p++ = rp->rp_status; /* already xdr'ed */
2613 ADJUST_ARGS();
2615 RESERVE_SPACE(rp->rp_buflen);
2616 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2617 ADJUST_ARGS();
2621 * END OF "GENERIC" ENCODE ROUTINES.
2625 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
2627 return xdr_ressize_check(rqstp, p);
2630 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2632 if (args->ops != args->iops) {
2633 kfree(args->ops);
2634 args->ops = args->iops;
2636 kfree(args->tmpp);
2637 args->tmpp = NULL;
2638 while (args->to_free) {
2639 struct tmpbuf *tb = args->to_free;
2640 args->to_free = tb->next;
2641 tb->release(tb->buf);
2642 kfree(tb);
2647 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
2649 __be32 status;
2651 args->p = p;
2652 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2653 args->pagelist = rqstp->rq_arg.pages;
2654 args->pagelen = rqstp->rq_arg.page_len;
2655 args->tmpp = NULL;
2656 args->to_free = NULL;
2657 args->ops = args->iops;
2658 args->rqstp = rqstp;
2660 status = nfsd4_decode_compound(args);
2661 if (status) {
2662 nfsd4_release_compoundargs(args);
2664 return !status;
2668 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
2671 * All that remains is to write the tag and operation count...
2673 struct kvec *iov;
2674 p = resp->tagp;
2675 *p++ = htonl(resp->taglen);
2676 memcpy(p, resp->tag, resp->taglen);
2677 p += XDR_QUADLEN(resp->taglen);
2678 *p++ = htonl(resp->opcnt);
2680 if (rqstp->rq_res.page_len)
2681 iov = &rqstp->rq_res.tail[0];
2682 else
2683 iov = &rqstp->rq_res.head[0];
2684 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2685 BUG_ON(iov->iov_len > PAGE_SIZE);
2686 return 1;
2690 * Local variables:
2691 * c-basic-offset: 8
2692 * End: