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sh: Provide __read_{read,write}sl() definitions for sh64.
[linux-2.6/mini2440.git] / fs / nfsd / nfs4xdr.c
blobb820c311931c8e7d73218f6aae5cbcfe2bbe4993
1 /*
2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
43 #include <linux/param.h>
44 #include <linux/smp.h>
45 #include <linux/fs.h>
46 #include <linux/namei.h>
47 #include <linux/vfs.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/xdr.h>
50 #include <linux/sunrpc/svc.h>
51 #include <linux/sunrpc/clnt.h>
52 #include <linux/nfsd/nfsd.h>
53 #include <linux/nfsd/state.h>
54 #include <linux/nfsd/xdr4.h>
55 #include <linux/nfsd_idmap.h>
56 #include <linux/nfs4.h>
57 #include <linux/nfs4_acl.h>
58 #include <linux/sunrpc/gss_api.h>
59 #include <linux/sunrpc/svcauth_gss.h>
60
61 #define NFSDDBG_FACILITY NFSDDBG_XDR
62
63 /*
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
67 */
68 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
69 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
70
71 static __be32
72 check_filename(char *str, int len, __be32 err)
73 {
74 int i;
75
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;
84 }
85
86 /*
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...).
91 *
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...
95 */
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 dprintk("NFSD: xdr error (%s:%d)\n", \
105 __FILE__, __LINE__); \
106 status = nfserr_bad_xdr; \
107 goto out
108
109 #define READ32(x) (x) = ntohl(*p++)
110 #define READ64(x) do { \
111 (x) = (u64)ntohl(*p++) << 32; \
112 (x) |= ntohl(*p++); \
113 } while (0)
114 #define READTIME(x) do { \
115 p++; \
116 (x) = ntohl(*p++); \
117 p++; \
118 } while (0)
119 #define READMEM(x,nbytes) do { \
120 x = (char *)p; \
121 p += XDR_QUADLEN(nbytes); \
122 } while (0)
123 #define SAVEMEM(x,nbytes) do { \
124 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
125 savemem(argp, p, nbytes) : \
126 (char *)p)) { \
127 dprintk("NFSD: xdr error (%s:%d)\n", \
128 __FILE__, __LINE__); \
129 goto xdr_error; \
130 } \
131 p += XDR_QUADLEN(nbytes); \
132 } while (0)
133 #define COPYMEM(x,nbytes) do { \
134 memcpy((x), p, nbytes); \
135 p += XDR_QUADLEN(nbytes); \
136 } while (0)
137
138 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
139 #define READ_BUF(nbytes) do { \
140 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
141 p = argp->p; \
142 argp->p += XDR_QUADLEN(nbytes); \
143 } else if (!(p = read_buf(argp, nbytes))) { \
144 dprintk("NFSD: xdr error (%s:%d)\n", \
145 __FILE__, __LINE__); \
146 goto xdr_error; \
147 } \
148 } while (0)
149
150 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
151 {
152 /* We want more bytes than seem to be available.
153 * Maybe we need a new page, maybe we have just run out
154 */
155 unsigned int avail = (char *)argp->end - (char *)argp->p;
156 __be32 *p;
157 if (avail + argp->pagelen < nbytes)
158 return NULL;
159 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
160 return NULL;
161 /* ok, we can do it with the current plus the next page */
162 if (nbytes <= sizeof(argp->tmp))
163 p = argp->tmp;
164 else {
165 kfree(argp->tmpp);
166 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
167 if (!p)
168 return NULL;
169
170 }
171 /*
172 * The following memcpy is safe because read_buf is always
173 * called with nbytes > avail, and the two cases above both
174 * guarantee p points to at least nbytes bytes.
175 */
176 memcpy(p, argp->p, avail);
177 /* step to next page */
178 argp->p = page_address(argp->pagelist[0]);
179 argp->pagelist++;
180 if (argp->pagelen < PAGE_SIZE) {
181 argp->end = p + (argp->pagelen>>2);
182 argp->pagelen = 0;
183 } else {
184 argp->end = p + (PAGE_SIZE>>2);
185 argp->pagelen -= PAGE_SIZE;
186 }
187 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
188 argp->p += XDR_QUADLEN(nbytes - avail);
189 return p;
190 }
191
192 static int zero_clientid(clientid_t *clid)
193 {
194 return (clid->cl_boot == 0) && (clid->cl_id == 0);
195 }
196
197 static int
198 defer_free(struct nfsd4_compoundargs *argp,
199 void (*release)(const void *), void *p)
200 {
201 struct tmpbuf *tb;
202
203 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
204 if (!tb)
205 return -ENOMEM;
206 tb->buf = p;
207 tb->release = release;
208 tb->next = argp->to_free;
209 argp->to_free = tb;
210 return 0;
211 }
212
213 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
214 {
215 if (p == argp->tmp) {
216 p = kmalloc(nbytes, GFP_KERNEL);
217 if (!p)
218 return NULL;
219 memcpy(p, argp->tmp, nbytes);
220 } else {
221 BUG_ON(p != argp->tmpp);
222 argp->tmpp = NULL;
223 }
224 if (defer_free(argp, kfree, p)) {
225 kfree(p);
226 return NULL;
227 } else
228 return (char *)p;
229 }
230
231 static __be32
232 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
233 {
234 u32 bmlen;
235 DECODE_HEAD;
236
237 bmval[0] = 0;
238 bmval[1] = 0;
239 bmval[2] = 0;
240
241 READ_BUF(4);
242 READ32(bmlen);
243 if (bmlen > 1000)
244 goto xdr_error;
245
246 READ_BUF(bmlen << 2);
247 if (bmlen > 0)
248 READ32(bmval[0]);
249 if (bmlen > 1)
250 READ32(bmval[1]);
251 if (bmlen > 2)
252 READ32(bmval[2]);
253
254 DECODE_TAIL;
255 }
256
257 static u32 nfsd_attrmask[] = {
258 NFSD_WRITEABLE_ATTRS_WORD0,
259 NFSD_WRITEABLE_ATTRS_WORD1,
260 NFSD_WRITEABLE_ATTRS_WORD2
261 };
262
263 static u32 nfsd41_ex_attrmask[] = {
264 NFSD_SUPPATTR_EXCLCREAT_WORD0,
265 NFSD_SUPPATTR_EXCLCREAT_WORD1,
266 NFSD_SUPPATTR_EXCLCREAT_WORD2
267 };
268
269 static __be32
270 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, u32 *writable,
271 struct iattr *iattr, struct nfs4_acl **acl)
272 {
273 int expected_len, len = 0;
274 u32 dummy32;
275 char *buf;
276 int host_err;
277
278 DECODE_HEAD;
279 iattr->ia_valid = 0;
280 if ((status = nfsd4_decode_bitmap(argp, bmval)))
281 return status;
282
283 /*
284 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP;
285 * read-only attributes return ERR_INVAL.
286 */
287 if ((bmval[0] & ~nfsd_suppattrs0(argp->minorversion)) ||
288 (bmval[1] & ~nfsd_suppattrs1(argp->minorversion)) ||
289 (bmval[2] & ~nfsd_suppattrs2(argp->minorversion)))
290 return nfserr_attrnotsupp;
291 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
292 (bmval[2] & ~writable[2]))
293 return nfserr_inval;
294
295 READ_BUF(4);
296 READ32(expected_len);
297
298 if (bmval[0] & FATTR4_WORD0_SIZE) {
299 READ_BUF(8);
300 len += 8;
301 READ64(iattr->ia_size);
302 iattr->ia_valid |= ATTR_SIZE;
303 }
304 if (bmval[0] & FATTR4_WORD0_ACL) {
305 int nace;
306 struct nfs4_ace *ace;
307
308 READ_BUF(4); len += 4;
309 READ32(nace);
310
311 if (nace > NFS4_ACL_MAX)
312 return nfserr_resource;
313
314 *acl = nfs4_acl_new(nace);
315 if (*acl == NULL) {
316 host_err = -ENOMEM;
317 goto out_nfserr;
318 }
319 defer_free(argp, kfree, *acl);
320
321 (*acl)->naces = nace;
322 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
323 READ_BUF(16); len += 16;
324 READ32(ace->type);
325 READ32(ace->flag);
326 READ32(ace->access_mask);
327 READ32(dummy32);
328 READ_BUF(dummy32);
329 len += XDR_QUADLEN(dummy32) << 2;
330 READMEM(buf, dummy32);
331 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
332 host_err = 0;
333 if (ace->whotype != NFS4_ACL_WHO_NAMED)
334 ace->who = 0;
335 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
336 host_err = nfsd_map_name_to_gid(argp->rqstp,
337 buf, dummy32, &ace->who);
338 else
339 host_err = nfsd_map_name_to_uid(argp->rqstp,
340 buf, dummy32, &ace->who);
341 if (host_err)
342 goto out_nfserr;
343 }
344 } else
345 *acl = NULL;
346 if (bmval[1] & FATTR4_WORD1_MODE) {
347 READ_BUF(4);
348 len += 4;
349 READ32(iattr->ia_mode);
350 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
351 iattr->ia_valid |= ATTR_MODE;
352 }
353 if (bmval[1] & FATTR4_WORD1_OWNER) {
354 READ_BUF(4);
355 len += 4;
356 READ32(dummy32);
357 READ_BUF(dummy32);
358 len += (XDR_QUADLEN(dummy32) << 2);
359 READMEM(buf, dummy32);
360 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
361 goto out_nfserr;
362 iattr->ia_valid |= ATTR_UID;
363 }
364 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
365 READ_BUF(4);
366 len += 4;
367 READ32(dummy32);
368 READ_BUF(dummy32);
369 len += (XDR_QUADLEN(dummy32) << 2);
370 READMEM(buf, dummy32);
371 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
372 goto out_nfserr;
373 iattr->ia_valid |= ATTR_GID;
374 }
375 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
376 READ_BUF(4);
377 len += 4;
378 READ32(dummy32);
379 switch (dummy32) {
380 case NFS4_SET_TO_CLIENT_TIME:
381 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
382 all 32 bits of 'nseconds'. */
383 READ_BUF(12);
384 len += 12;
385 READ32(dummy32);
386 if (dummy32)
387 return nfserr_inval;
388 READ32(iattr->ia_atime.tv_sec);
389 READ32(iattr->ia_atime.tv_nsec);
390 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
391 return nfserr_inval;
392 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
393 break;
394 case NFS4_SET_TO_SERVER_TIME:
395 iattr->ia_valid |= ATTR_ATIME;
396 break;
397 default:
398 goto xdr_error;
399 }
400 }
401 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
402 READ_BUF(4);
403 len += 4;
404 READ32(dummy32);
405 switch (dummy32) {
406 case NFS4_SET_TO_CLIENT_TIME:
407 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
408 all 32 bits of 'nseconds'. */
409 READ_BUF(12);
410 len += 12;
411 READ32(dummy32);
412 if (dummy32)
413 return nfserr_inval;
414 READ32(iattr->ia_mtime.tv_sec);
415 READ32(iattr->ia_mtime.tv_nsec);
416 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
417 return nfserr_inval;
418 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
419 break;
420 case NFS4_SET_TO_SERVER_TIME:
421 iattr->ia_valid |= ATTR_MTIME;
422 break;
423 default:
424 goto xdr_error;
425 }
426 }
427 BUG_ON(bmval[2]); /* no such writeable attr supported yet */
428 if (len != expected_len)
429 goto xdr_error;
430
431 DECODE_TAIL;
432
433 out_nfserr:
434 status = nfserrno(host_err);
435 goto out;
436 }
437
438 static __be32
439 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
440 {
441 DECODE_HEAD;
442
443 READ_BUF(sizeof(stateid_t));
444 READ32(sid->si_generation);
445 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
446
447 DECODE_TAIL;
448 }
449
450 static __be32
451 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
452 {
453 DECODE_HEAD;
454
455 READ_BUF(4);
456 READ32(access->ac_req_access);
457
458 DECODE_TAIL;
459 }
460
461 static __be32
462 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
463 {
464 DECODE_HEAD;
465
466 close->cl_stateowner = NULL;
467 READ_BUF(4);
468 READ32(close->cl_seqid);
469 return nfsd4_decode_stateid(argp, &close->cl_stateid);
470
471 DECODE_TAIL;
472 }
473
474
475 static __be32
476 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
477 {
478 DECODE_HEAD;
479
480 READ_BUF(12);
481 READ64(commit->co_offset);
482 READ32(commit->co_count);
483
484 DECODE_TAIL;
485 }
486
487 static __be32
488 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
489 {
490 DECODE_HEAD;
491
492 READ_BUF(4);
493 READ32(create->cr_type);
494 switch (create->cr_type) {
495 case NF4LNK:
496 READ_BUF(4);
497 READ32(create->cr_linklen);
498 READ_BUF(create->cr_linklen);
499 SAVEMEM(create->cr_linkname, create->cr_linklen);
500 break;
501 case NF4BLK:
502 case NF4CHR:
503 READ_BUF(8);
504 READ32(create->cr_specdata1);
505 READ32(create->cr_specdata2);
506 break;
507 case NF4SOCK:
508 case NF4FIFO:
509 case NF4DIR:
510 default:
511 break;
512 }
513
514 READ_BUF(4);
515 READ32(create->cr_namelen);
516 READ_BUF(create->cr_namelen);
517 SAVEMEM(create->cr_name, create->cr_namelen);
518 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
519 return status;
520
521 status = nfsd4_decode_fattr(argp, create->cr_bmval, nfsd_attrmask,
522 &create->cr_iattr, &create->cr_acl);
523 if (status)
524 goto out;
525
526 DECODE_TAIL;
527 }
528
529 static inline __be32
530 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
531 {
532 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
533 }
534
535 static inline __be32
536 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
537 {
538 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
539 }
540
541 static __be32
542 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
543 {
544 DECODE_HEAD;
545
546 READ_BUF(4);
547 READ32(link->li_namelen);
548 READ_BUF(link->li_namelen);
549 SAVEMEM(link->li_name, link->li_namelen);
550 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
551 return status;
552
553 DECODE_TAIL;
554 }
555
556 static __be32
557 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
558 {
559 DECODE_HEAD;
560
561 lock->lk_replay_owner = NULL;
562 /*
563 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
564 */
565 READ_BUF(28);
566 READ32(lock->lk_type);
567 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
568 goto xdr_error;
569 READ32(lock->lk_reclaim);
570 READ64(lock->lk_offset);
571 READ64(lock->lk_length);
572 READ32(lock->lk_is_new);
573
574 if (lock->lk_is_new) {
575 READ_BUF(4);
576 READ32(lock->lk_new_open_seqid);
577 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
578 if (status)
579 return status;
580 READ_BUF(8 + sizeof(clientid_t));
581 READ32(lock->lk_new_lock_seqid);
582 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
583 READ32(lock->lk_new_owner.len);
584 READ_BUF(lock->lk_new_owner.len);
585 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
586 } else {
587 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
588 if (status)
589 return status;
590 READ_BUF(4);
591 READ32(lock->lk_old_lock_seqid);
592 }
593
594 DECODE_TAIL;
595 }
596
597 static __be32
598 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
599 {
600 DECODE_HEAD;
601
602 READ_BUF(32);
603 READ32(lockt->lt_type);
604 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
605 goto xdr_error;
606 READ64(lockt->lt_offset);
607 READ64(lockt->lt_length);
608 COPYMEM(&lockt->lt_clientid, 8);
609 READ32(lockt->lt_owner.len);
610 READ_BUF(lockt->lt_owner.len);
611 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
612
613 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
614 return nfserr_inval;
615 DECODE_TAIL;
616 }
617
618 static __be32
619 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
620 {
621 DECODE_HEAD;
622
623 locku->lu_stateowner = NULL;
624 READ_BUF(8);
625 READ32(locku->lu_type);
626 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
627 goto xdr_error;
628 READ32(locku->lu_seqid);
629 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
630 if (status)
631 return status;
632 READ_BUF(16);
633 READ64(locku->lu_offset);
634 READ64(locku->lu_length);
635
636 DECODE_TAIL;
637 }
638
639 static __be32
640 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
641 {
642 DECODE_HEAD;
643
644 READ_BUF(4);
645 READ32(lookup->lo_len);
646 READ_BUF(lookup->lo_len);
647 SAVEMEM(lookup->lo_name, lookup->lo_len);
648 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
649 return status;
650
651 DECODE_TAIL;
652 }
653
654 static __be32
655 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
656 {
657 DECODE_HEAD;
658
659 memset(open->op_bmval, 0, sizeof(open->op_bmval));
660 open->op_iattr.ia_valid = 0;
661 open->op_stateowner = NULL;
662
663 /* seqid, share_access, share_deny, clientid, ownerlen */
664 READ_BUF(16 + sizeof(clientid_t));
665 READ32(open->op_seqid);
666 READ32(open->op_share_access);
667 READ32(open->op_share_deny);
668 COPYMEM(&open->op_clientid, sizeof(clientid_t));
669 READ32(open->op_owner.len);
670
671 /* owner, open_flag */
672 READ_BUF(open->op_owner.len + 4);
673 SAVEMEM(open->op_owner.data, open->op_owner.len);
674 READ32(open->op_create);
675 switch (open->op_create) {
676 case NFS4_OPEN_NOCREATE:
677 break;
678 case NFS4_OPEN_CREATE:
679 READ_BUF(4);
680 READ32(open->op_createmode);
681 switch (open->op_createmode) {
682 case NFS4_CREATE_UNCHECKED:
683 case NFS4_CREATE_GUARDED:
684 status = nfsd4_decode_fattr(argp, open->op_bmval,
685 nfsd_attrmask, &open->op_iattr, &open->op_acl);
686 if (status)
687 goto out;
688 break;
689 case NFS4_CREATE_EXCLUSIVE:
690 READ_BUF(8);
691 COPYMEM(open->op_verf.data, 8);
692 break;
693 case NFS4_CREATE_EXCLUSIVE4_1:
694 if (argp->minorversion < 1)
695 goto xdr_error;
696 READ_BUF(8);
697 COPYMEM(open->op_verf.data, 8);
698 status = nfsd4_decode_fattr(argp, open->op_bmval,
699 nfsd41_ex_attrmask, &open->op_iattr,
700 &open->op_acl);
701 if (status)
702 goto out;
703 break;
704 default:
705 goto xdr_error;
706 }
707 break;
708 default:
709 goto xdr_error;
710 }
711
712 /* open_claim */
713 READ_BUF(4);
714 READ32(open->op_claim_type);
715 switch (open->op_claim_type) {
716 case NFS4_OPEN_CLAIM_NULL:
717 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
718 READ_BUF(4);
719 READ32(open->op_fname.len);
720 READ_BUF(open->op_fname.len);
721 SAVEMEM(open->op_fname.data, open->op_fname.len);
722 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
723 return status;
724 break;
725 case NFS4_OPEN_CLAIM_PREVIOUS:
726 READ_BUF(4);
727 READ32(open->op_delegate_type);
728 break;
729 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
730 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
731 if (status)
732 return status;
733 READ_BUF(4);
734 READ32(open->op_fname.len);
735 READ_BUF(open->op_fname.len);
736 SAVEMEM(open->op_fname.data, open->op_fname.len);
737 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
738 return status;
739 break;
740 default:
741 goto xdr_error;
742 }
743
744 DECODE_TAIL;
745 }
746
747 static __be32
748 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
749 {
750 DECODE_HEAD;
751
752 open_conf->oc_stateowner = NULL;
753 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
754 if (status)
755 return status;
756 READ_BUF(4);
757 READ32(open_conf->oc_seqid);
758
759 DECODE_TAIL;
760 }
761
762 static __be32
763 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
764 {
765 DECODE_HEAD;
766
767 open_down->od_stateowner = NULL;
768 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
769 if (status)
770 return status;
771 READ_BUF(12);
772 READ32(open_down->od_seqid);
773 READ32(open_down->od_share_access);
774 READ32(open_down->od_share_deny);
775
776 DECODE_TAIL;
777 }
778
779 static __be32
780 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
781 {
782 DECODE_HEAD;
783
784 READ_BUF(4);
785 READ32(putfh->pf_fhlen);
786 if (putfh->pf_fhlen > NFS4_FHSIZE)
787 goto xdr_error;
788 READ_BUF(putfh->pf_fhlen);
789 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
790
791 DECODE_TAIL;
792 }
793
794 static __be32
795 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
796 {
797 DECODE_HEAD;
798
799 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
800 if (status)
801 return status;
802 READ_BUF(12);
803 READ64(read->rd_offset);
804 READ32(read->rd_length);
805
806 DECODE_TAIL;
807 }
808
809 static __be32
810 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
811 {
812 DECODE_HEAD;
813
814 READ_BUF(24);
815 READ64(readdir->rd_cookie);
816 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
817 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
818 READ32(readdir->rd_maxcount);
819 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
820 goto out;
821
822 DECODE_TAIL;
823 }
824
825 static __be32
826 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
827 {
828 DECODE_HEAD;
829
830 READ_BUF(4);
831 READ32(remove->rm_namelen);
832 READ_BUF(remove->rm_namelen);
833 SAVEMEM(remove->rm_name, remove->rm_namelen);
834 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
835 return status;
836
837 DECODE_TAIL;
838 }
839
840 static __be32
841 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
842 {
843 DECODE_HEAD;
844
845 READ_BUF(4);
846 READ32(rename->rn_snamelen);
847 READ_BUF(rename->rn_snamelen + 4);
848 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
849 READ32(rename->rn_tnamelen);
850 READ_BUF(rename->rn_tnamelen);
851 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
852 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
853 return status;
854 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
855 return status;
856
857 DECODE_TAIL;
858 }
859
860 static __be32
861 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
862 {
863 DECODE_HEAD;
864
865 READ_BUF(sizeof(clientid_t));
866 COPYMEM(clientid, sizeof(clientid_t));
867
868 DECODE_TAIL;
869 }
870
871 static __be32
872 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
873 struct nfsd4_secinfo *secinfo)
874 {
875 DECODE_HEAD;
876
877 READ_BUF(4);
878 READ32(secinfo->si_namelen);
879 READ_BUF(secinfo->si_namelen);
880 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
881 status = check_filename(secinfo->si_name, secinfo->si_namelen,
882 nfserr_noent);
883 if (status)
884 return status;
885 DECODE_TAIL;
886 }
887
888 static __be32
889 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
890 {
891 __be32 status;
892
893 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
894 if (status)
895 return status;
896 return nfsd4_decode_fattr(argp, setattr->sa_bmval, nfsd_attrmask,
897 &setattr->sa_iattr, &setattr->sa_acl);
898 }
899
900 static __be32
901 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
902 {
903 DECODE_HEAD;
904
905 READ_BUF(12);
906 COPYMEM(setclientid->se_verf.data, 8);
907 READ32(setclientid->se_namelen);
908
909 READ_BUF(setclientid->se_namelen + 8);
910 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
911 READ32(setclientid->se_callback_prog);
912 READ32(setclientid->se_callback_netid_len);
913
914 READ_BUF(setclientid->se_callback_netid_len + 4);
915 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
916 READ32(setclientid->se_callback_addr_len);
917
918 READ_BUF(setclientid->se_callback_addr_len + 4);
919 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
920 READ32(setclientid->se_callback_ident);
921
922 DECODE_TAIL;
923 }
924
925 static __be32
926 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
927 {
928 DECODE_HEAD;
929
930 READ_BUF(8 + sizeof(nfs4_verifier));
931 COPYMEM(&scd_c->sc_clientid, 8);
932 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
933
934 DECODE_TAIL;
935 }
936
937 /* Also used for NVERIFY */
938 static __be32
939 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
940 {
941 #if 0
942 struct nfsd4_compoundargs save = {
943 .p = argp->p,
944 .end = argp->end,
945 .rqstp = argp->rqstp,
946 };
947 u32 ve_bmval[2];
948 struct iattr ve_iattr; /* request */
949 struct nfs4_acl *ve_acl; /* request */
950 #endif
951 DECODE_HEAD;
952
953 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
954 goto out;
955
956 /* For convenience's sake, we compare raw xdr'd attributes in
957 * nfsd4_proc_verify; however we still decode here just to return
958 * correct error in case of bad xdr. */
959 #if 0
960 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
961 if (status == nfserr_inval) {
962 status = nfserrno(status);
963 goto out;
964 }
965 #endif
966 READ_BUF(4);
967 READ32(verify->ve_attrlen);
968 READ_BUF(verify->ve_attrlen);
969 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
970
971 DECODE_TAIL;
972 }
973
974 static __be32
975 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
976 {
977 int avail;
978 int v;
979 int len;
980 DECODE_HEAD;
981
982 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
983 if (status)
984 return status;
985 READ_BUF(16);
986 READ64(write->wr_offset);
987 READ32(write->wr_stable_how);
988 if (write->wr_stable_how > 2)
989 goto xdr_error;
990 READ32(write->wr_buflen);
991
992 /* Sorry .. no magic macros for this.. *
993 * READ_BUF(write->wr_buflen);
994 * SAVEMEM(write->wr_buf, write->wr_buflen);
995 */
996 avail = (char*)argp->end - (char*)argp->p;
997 if (avail + argp->pagelen < write->wr_buflen) {
998 dprintk("NFSD: xdr error (%s:%d)\n",
999 __FILE__, __LINE__);
1000 goto xdr_error;
1001 }
1002 argp->rqstp->rq_vec[0].iov_base = p;
1003 argp->rqstp->rq_vec[0].iov_len = avail;
1004 v = 0;
1005 len = write->wr_buflen;
1006 while (len > argp->rqstp->rq_vec[v].iov_len) {
1007 len -= argp->rqstp->rq_vec[v].iov_len;
1008 v++;
1009 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1010 argp->pagelist++;
1011 if (argp->pagelen >= PAGE_SIZE) {
1012 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1013 argp->pagelen -= PAGE_SIZE;
1014 } else {
1015 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1016 argp->pagelen -= len;
1017 }
1018 }
1019 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
1020 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
1021 argp->rqstp->rq_vec[v].iov_len = len;
1022 write->wr_vlen = v+1;
1023
1024 DECODE_TAIL;
1025 }
1026
1027 static __be32
1028 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1029 {
1030 DECODE_HEAD;
1031
1032 READ_BUF(12);
1033 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1034 READ32(rlockowner->rl_owner.len);
1035 READ_BUF(rlockowner->rl_owner.len);
1036 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1037
1038 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1039 return nfserr_inval;
1040 DECODE_TAIL;
1041 }
1042
1043 static __be32
1044 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1045 struct nfsd4_exchange_id *exid)
1046 {
1047 int dummy;
1048 DECODE_HEAD;
1049
1050 READ_BUF(NFS4_VERIFIER_SIZE);
1051 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1052
1053 READ_BUF(4);
1054 READ32(exid->clname.len);
1055
1056 READ_BUF(exid->clname.len);
1057 SAVEMEM(exid->clname.data, exid->clname.len);
1058
1059 READ_BUF(4);
1060 READ32(exid->flags);
1061
1062 /* Ignore state_protect4_a */
1063 READ_BUF(4);
1064 READ32(exid->spa_how);
1065 switch (exid->spa_how) {
1066 case SP4_NONE:
1067 break;
1068 case SP4_MACH_CRED:
1069 /* spo_must_enforce */
1070 READ_BUF(4);
1071 READ32(dummy);
1072 READ_BUF(dummy * 4);
1073 p += dummy;
1074
1075 /* spo_must_allow */
1076 READ_BUF(4);
1077 READ32(dummy);
1078 READ_BUF(dummy * 4);
1079 p += dummy;
1080 break;
1081 case SP4_SSV:
1082 /* ssp_ops */
1083 READ_BUF(4);
1084 READ32(dummy);
1085 READ_BUF(dummy * 4);
1086 p += dummy;
1087
1088 READ_BUF(4);
1089 READ32(dummy);
1090 READ_BUF(dummy * 4);
1091 p += dummy;
1092
1093 /* ssp_hash_algs<> */
1094 READ_BUF(4);
1095 READ32(dummy);
1096 READ_BUF(dummy);
1097 p += XDR_QUADLEN(dummy);
1098
1099 /* ssp_encr_algs<> */
1100 READ_BUF(4);
1101 READ32(dummy);
1102 READ_BUF(dummy);
1103 p += XDR_QUADLEN(dummy);
1104
1105 /* ssp_window and ssp_num_gss_handles */
1106 READ_BUF(8);
1107 READ32(dummy);
1108 READ32(dummy);
1109 break;
1110 default:
1111 goto xdr_error;
1112 }
1113
1114 /* Ignore Implementation ID */
1115 READ_BUF(4); /* nfs_impl_id4 array length */
1116 READ32(dummy);
1117
1118 if (dummy > 1)
1119 goto xdr_error;
1120
1121 if (dummy == 1) {
1122 /* nii_domain */
1123 READ_BUF(4);
1124 READ32(dummy);
1125 READ_BUF(dummy);
1126 p += XDR_QUADLEN(dummy);
1127
1128 /* nii_name */
1129 READ_BUF(4);
1130 READ32(dummy);
1131 READ_BUF(dummy);
1132 p += XDR_QUADLEN(dummy);
1133
1134 /* nii_date */
1135 READ_BUF(12);
1136 p += 3;
1137 }
1138 DECODE_TAIL;
1139 }
1140
1141 static __be32
1142 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1143 struct nfsd4_create_session *sess)
1144 {
1145 DECODE_HEAD;
1146
1147 u32 dummy;
1148 char *machine_name;
1149 int i;
1150 int nr_secflavs;
1151
1152 READ_BUF(16);
1153 COPYMEM(&sess->clientid, 8);
1154 READ32(sess->seqid);
1155 READ32(sess->flags);
1156
1157 /* Fore channel attrs */
1158 READ_BUF(28);
1159 READ32(dummy); /* headerpadsz is always 0 */
1160 READ32(sess->fore_channel.maxreq_sz);
1161 READ32(sess->fore_channel.maxresp_sz);
1162 READ32(sess->fore_channel.maxresp_cached);
1163 READ32(sess->fore_channel.maxops);
1164 READ32(sess->fore_channel.maxreqs);
1165 READ32(sess->fore_channel.nr_rdma_attrs);
1166 if (sess->fore_channel.nr_rdma_attrs == 1) {
1167 READ_BUF(4);
1168 READ32(sess->fore_channel.rdma_attrs);
1169 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1170 dprintk("Too many fore channel attr bitmaps!\n");
1171 goto xdr_error;
1172 }
1173
1174 /* Back channel attrs */
1175 READ_BUF(28);
1176 READ32(dummy); /* headerpadsz is always 0 */
1177 READ32(sess->back_channel.maxreq_sz);
1178 READ32(sess->back_channel.maxresp_sz);
1179 READ32(sess->back_channel.maxresp_cached);
1180 READ32(sess->back_channel.maxops);
1181 READ32(sess->back_channel.maxreqs);
1182 READ32(sess->back_channel.nr_rdma_attrs);
1183 if (sess->back_channel.nr_rdma_attrs == 1) {
1184 READ_BUF(4);
1185 READ32(sess->back_channel.rdma_attrs);
1186 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1187 dprintk("Too many back channel attr bitmaps!\n");
1188 goto xdr_error;
1189 }
1190
1191 READ_BUF(8);
1192 READ32(sess->callback_prog);
1193
1194 /* callback_sec_params4 */
1195 READ32(nr_secflavs);
1196 for (i = 0; i < nr_secflavs; ++i) {
1197 READ_BUF(4);
1198 READ32(dummy);
1199 switch (dummy) {
1200 case RPC_AUTH_NULL:
1201 /* Nothing to read */
1202 break;
1203 case RPC_AUTH_UNIX:
1204 READ_BUF(8);
1205 /* stamp */
1206 READ32(dummy);
1207
1208 /* machine name */
1209 READ32(dummy);
1210 READ_BUF(dummy);
1211 SAVEMEM(machine_name, dummy);
1212
1213 /* uid, gid */
1214 READ_BUF(8);
1215 READ32(sess->uid);
1216 READ32(sess->gid);
1217
1218 /* more gids */
1219 READ_BUF(4);
1220 READ32(dummy);
1221 READ_BUF(dummy * 4);
1222 for (i = 0; i < dummy; ++i)
1223 READ32(dummy);
1224 break;
1225 case RPC_AUTH_GSS:
1226 dprintk("RPC_AUTH_GSS callback secflavor "
1227 "not supported!\n");
1228 READ_BUF(8);
1229 /* gcbp_service */
1230 READ32(dummy);
1231 /* gcbp_handle_from_server */
1232 READ32(dummy);
1233 READ_BUF(dummy);
1234 p += XDR_QUADLEN(dummy);
1235 /* gcbp_handle_from_client */
1236 READ_BUF(4);
1237 READ32(dummy);
1238 READ_BUF(dummy);
1239 p += XDR_QUADLEN(dummy);
1240 break;
1241 default:
1242 dprintk("Illegal callback secflavor\n");
1243 return nfserr_inval;
1244 }
1245 }
1246 DECODE_TAIL;
1247 }
1248
1249 static __be32
1250 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1251 struct nfsd4_destroy_session *destroy_session)
1252 {
1253 DECODE_HEAD;
1254 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1255 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1256
1257 DECODE_TAIL;
1258 }
1259
1260 static __be32
1261 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1262 struct nfsd4_sequence *seq)
1263 {
1264 DECODE_HEAD;
1265
1266 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1267 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1268 READ32(seq->seqid);
1269 READ32(seq->slotid);
1270 READ32(seq->maxslots);
1271 READ32(seq->cachethis);
1272
1273 DECODE_TAIL;
1274 }
1275
1276 static __be32
1277 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1278 {
1279 return nfs_ok;
1280 }
1281
1282 static __be32
1283 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1284 {
1285 return nfserr_notsupp;
1286 }
1287
1288 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1289
1290 static nfsd4_dec nfsd4_dec_ops[] = {
1291 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1292 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1293 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1294 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1295 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1296 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1297 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1298 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1299 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1300 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1301 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1302 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1303 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1304 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1305 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1306 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1307 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1308 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1309 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1310 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1311 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1312 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1313 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1314 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1315 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1316 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1317 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1318 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1319 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1320 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1321 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1322 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1323 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1324 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1325 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1326 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1327 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1328 };
1329
1330 static nfsd4_dec nfsd41_dec_ops[] = {
1331 [OP_ACCESS] (nfsd4_dec)nfsd4_decode_access,
1332 [OP_CLOSE] (nfsd4_dec)nfsd4_decode_close,
1333 [OP_COMMIT] (nfsd4_dec)nfsd4_decode_commit,
1334 [OP_CREATE] (nfsd4_dec)nfsd4_decode_create,
1335 [OP_DELEGPURGE] (nfsd4_dec)nfsd4_decode_notsupp,
1336 [OP_DELEGRETURN] (nfsd4_dec)nfsd4_decode_delegreturn,
1337 [OP_GETATTR] (nfsd4_dec)nfsd4_decode_getattr,
1338 [OP_GETFH] (nfsd4_dec)nfsd4_decode_noop,
1339 [OP_LINK] (nfsd4_dec)nfsd4_decode_link,
1340 [OP_LOCK] (nfsd4_dec)nfsd4_decode_lock,
1341 [OP_LOCKT] (nfsd4_dec)nfsd4_decode_lockt,
1342 [OP_LOCKU] (nfsd4_dec)nfsd4_decode_locku,
1343 [OP_LOOKUP] (nfsd4_dec)nfsd4_decode_lookup,
1344 [OP_LOOKUPP] (nfsd4_dec)nfsd4_decode_noop,
1345 [OP_NVERIFY] (nfsd4_dec)nfsd4_decode_verify,
1346 [OP_OPEN] (nfsd4_dec)nfsd4_decode_open,
1347 [OP_OPENATTR] (nfsd4_dec)nfsd4_decode_notsupp,
1348 [OP_OPEN_CONFIRM] (nfsd4_dec)nfsd4_decode_notsupp,
1349 [OP_OPEN_DOWNGRADE] (nfsd4_dec)nfsd4_decode_open_downgrade,
1350 [OP_PUTFH] (nfsd4_dec)nfsd4_decode_putfh,
1351 [OP_PUTPUBFH] (nfsd4_dec)nfsd4_decode_notsupp,
1352 [OP_PUTROOTFH] (nfsd4_dec)nfsd4_decode_noop,
1353 [OP_READ] (nfsd4_dec)nfsd4_decode_read,
1354 [OP_READDIR] (nfsd4_dec)nfsd4_decode_readdir,
1355 [OP_READLINK] (nfsd4_dec)nfsd4_decode_noop,
1356 [OP_REMOVE] (nfsd4_dec)nfsd4_decode_remove,
1357 [OP_RENAME] (nfsd4_dec)nfsd4_decode_rename,
1358 [OP_RENEW] (nfsd4_dec)nfsd4_decode_notsupp,
1359 [OP_RESTOREFH] (nfsd4_dec)nfsd4_decode_noop,
1360 [OP_SAVEFH] (nfsd4_dec)nfsd4_decode_noop,
1361 [OP_SECINFO] (nfsd4_dec)nfsd4_decode_secinfo,
1362 [OP_SETATTR] (nfsd4_dec)nfsd4_decode_setattr,
1363 [OP_SETCLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1364 [OP_SETCLIENTID_CONFIRM](nfsd4_dec)nfsd4_decode_notsupp,
1365 [OP_VERIFY] (nfsd4_dec)nfsd4_decode_verify,
1366 [OP_WRITE] (nfsd4_dec)nfsd4_decode_write,
1367 [OP_RELEASE_LOCKOWNER] (nfsd4_dec)nfsd4_decode_notsupp,
1368
1369 /* new operations for NFSv4.1 */
1370 [OP_BACKCHANNEL_CTL] (nfsd4_dec)nfsd4_decode_notsupp,
1371 [OP_BIND_CONN_TO_SESSION](nfsd4_dec)nfsd4_decode_notsupp,
1372 [OP_EXCHANGE_ID] (nfsd4_dec)nfsd4_decode_exchange_id,
1373 [OP_CREATE_SESSION] (nfsd4_dec)nfsd4_decode_create_session,
1374 [OP_DESTROY_SESSION] (nfsd4_dec)nfsd4_decode_destroy_session,
1375 [OP_FREE_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1376 [OP_GET_DIR_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1377 [OP_GETDEVICEINFO] (nfsd4_dec)nfsd4_decode_notsupp,
1378 [OP_GETDEVICELIST] (nfsd4_dec)nfsd4_decode_notsupp,
1379 [OP_LAYOUTCOMMIT] (nfsd4_dec)nfsd4_decode_notsupp,
1380 [OP_LAYOUTGET] (nfsd4_dec)nfsd4_decode_notsupp,
1381 [OP_LAYOUTRETURN] (nfsd4_dec)nfsd4_decode_notsupp,
1382 [OP_SECINFO_NO_NAME] (nfsd4_dec)nfsd4_decode_notsupp,
1383 [OP_SEQUENCE] (nfsd4_dec)nfsd4_decode_sequence,
1384 [OP_SET_SSV] (nfsd4_dec)nfsd4_decode_notsupp,
1385 [OP_TEST_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1386 [OP_WANT_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1387 [OP_DESTROY_CLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1388 [OP_RECLAIM_COMPLETE] (nfsd4_dec)nfsd4_decode_notsupp,
1389 };
1390
1391 struct nfsd4_minorversion_ops {
1392 nfsd4_dec *decoders;
1393 int nops;
1394 };
1395
1396 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1397 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1398 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1399 };
1400
1401 static __be32
1402 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1403 {
1404 DECODE_HEAD;
1405 struct nfsd4_op *op;
1406 struct nfsd4_minorversion_ops *ops;
1407 int i;
1408
1409 /*
1410 * XXX: According to spec, we should check the tag
1411 * for UTF-8 compliance. I'm postponing this for
1412 * now because it seems that some clients do use
1413 * binary tags.
1414 */
1415 READ_BUF(4);
1416 READ32(argp->taglen);
1417 READ_BUF(argp->taglen + 8);
1418 SAVEMEM(argp->tag, argp->taglen);
1419 READ32(argp->minorversion);
1420 READ32(argp->opcnt);
1421
1422 if (argp->taglen > NFSD4_MAX_TAGLEN)
1423 goto xdr_error;
1424 if (argp->opcnt > 100)
1425 goto xdr_error;
1426
1427 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1428 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1429 if (!argp->ops) {
1430 argp->ops = argp->iops;
1431 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1432 goto xdr_error;
1433 }
1434 }
1435
1436 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1437 argp->opcnt = 0;
1438
1439 ops = &nfsd4_minorversion[argp->minorversion];
1440 for (i = 0; i < argp->opcnt; i++) {
1441 op = &argp->ops[i];
1442 op->replay = NULL;
1443
1444 /*
1445 * We can't use READ_BUF() here because we need to handle
1446 * a missing opcode as an OP_WRITE + 1. So we need to check
1447 * to see if we're truly at the end of our buffer or if there
1448 * is another page we need to flip to.
1449 */
1450
1451 if (argp->p == argp->end) {
1452 if (argp->pagelen < 4) {
1453 /* There isn't an opcode still on the wire */
1454 op->opnum = OP_WRITE + 1;
1455 op->status = nfserr_bad_xdr;
1456 argp->opcnt = i+1;
1457 break;
1458 }
1459
1460 /*
1461 * False alarm. We just hit a page boundary, but there
1462 * is still data available. Move pointer across page
1463 * boundary. *snip from READ_BUF*
1464 */
1465 argp->p = page_address(argp->pagelist[0]);
1466 argp->pagelist++;
1467 if (argp->pagelen < PAGE_SIZE) {
1468 argp->end = p + (argp->pagelen>>2);
1469 argp->pagelen = 0;
1470 } else {
1471 argp->end = p + (PAGE_SIZE>>2);
1472 argp->pagelen -= PAGE_SIZE;
1473 }
1474 }
1475 op->opnum = ntohl(*argp->p++);
1476
1477 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1478 op->status = ops->decoders[op->opnum](argp, &op->u);
1479 else {
1480 op->opnum = OP_ILLEGAL;
1481 op->status = nfserr_op_illegal;
1482 }
1483
1484 if (op->status) {
1485 argp->opcnt = i+1;
1486 break;
1487 }
1488 }
1489
1490 DECODE_TAIL;
1491 }
1492 /*
1493 * END OF "GENERIC" DECODE ROUTINES.
1494 */
1495
1496 /*
1497 * START OF "GENERIC" ENCODE ROUTINES.
1498 * These may look a little ugly since they are imported from a "generic"
1499 * set of XDR encode/decode routines which are intended to be shared by
1500 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1501 *
1502 * If the pain of reading these is too great, it should be a straightforward
1503 * task to translate them into Linux-specific versions which are more
1504 * consistent with the style used in NFSv2/v3...
1505 */
1506 #define ENCODE_HEAD __be32 *p
1507
1508 #define WRITE32(n) *p++ = htonl(n)
1509 #define WRITE64(n) do { \
1510 *p++ = htonl((u32)((n) >> 32)); \
1511 *p++ = htonl((u32)(n)); \
1512 } while (0)
1513 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1514 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1515 memcpy(p, ptr, nbytes); \
1516 p += XDR_QUADLEN(nbytes); \
1517 }} while (0)
1518 #define WRITECINFO(c) do { \
1519 *p++ = htonl(c.atomic); \
1520 *p++ = htonl(c.before_ctime_sec); \
1521 *p++ = htonl(c.before_ctime_nsec); \
1522 *p++ = htonl(c.after_ctime_sec); \
1523 *p++ = htonl(c.after_ctime_nsec); \
1524 } while (0)
1525
1526 #define RESERVE_SPACE(nbytes) do { \
1527 p = resp->p; \
1528 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1529 } while (0)
1530 #define ADJUST_ARGS() resp->p = p
1531
1532 /*
1533 * Header routine to setup seqid operation replay cache
1534 */
1535 #define ENCODE_SEQID_OP_HEAD \
1536 __be32 *save; \
1537 \
1538 save = resp->p;
1539
1540 /*
1541 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1542 * is where sequence id's are incremented, and the replay cache is filled.
1543 * Note that we increment sequence id's here, at the last moment, so we're sure
1544 * we know whether the error to be returned is a sequence id mutating error.
1545 */
1546
1547 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1548 if (seqid_mutating_err(nfserr) && stateowner) { \
1549 stateowner->so_seqid++; \
1550 stateowner->so_replay.rp_status = nfserr; \
1551 stateowner->so_replay.rp_buflen = \
1552 (((char *)(resp)->p - (char *)save)); \
1553 memcpy(stateowner->so_replay.rp_buf, save, \
1554 stateowner->so_replay.rp_buflen); \
1555 } } while (0);
1556
1557 /* Encode as an array of strings the string given with components
1558 * seperated @sep.
1559 */
1560 static __be32 nfsd4_encode_components(char sep, char *components,
1561 __be32 **pp, int *buflen)
1562 {
1563 __be32 *p = *pp;
1564 __be32 *countp = p;
1565 int strlen, count=0;
1566 char *str, *end;
1567
1568 dprintk("nfsd4_encode_components(%s)\n", components);
1569 if ((*buflen -= 4) < 0)
1570 return nfserr_resource;
1571 WRITE32(0); /* We will fill this in with @count later */
1572 end = str = components;
1573 while (*end) {
1574 for (; *end && (*end != sep); end++)
1575 ; /* Point to end of component */
1576 strlen = end - str;
1577 if (strlen) {
1578 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1579 return nfserr_resource;
1580 WRITE32(strlen);
1581 WRITEMEM(str, strlen);
1582 count++;
1583 }
1584 else
1585 end++;
1586 str = end;
1587 }
1588 *pp = p;
1589 p = countp;
1590 WRITE32(count);
1591 return 0;
1592 }
1593
1594 /*
1595 * encode a location element of a fs_locations structure
1596 */
1597 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1598 __be32 **pp, int *buflen)
1599 {
1600 __be32 status;
1601 __be32 *p = *pp;
1602
1603 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1604 if (status)
1605 return status;
1606 status = nfsd4_encode_components('/', location->path, &p, buflen);
1607 if (status)
1608 return status;
1609 *pp = p;
1610 return 0;
1611 }
1612
1613 /*
1614 * Return the path to an export point in the pseudo filesystem namespace
1615 * Returned string is safe to use as long as the caller holds a reference
1616 * to @exp.
1617 */
1618 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1619 {
1620 struct svc_fh tmp_fh;
1621 char *path, *rootpath;
1622
1623 fh_init(&tmp_fh, NFS4_FHSIZE);
1624 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1625 if (*stat)
1626 return NULL;
1627 rootpath = tmp_fh.fh_export->ex_pathname;
1628
1629 path = exp->ex_pathname;
1630
1631 if (strncmp(path, rootpath, strlen(rootpath))) {
1632 dprintk("nfsd: fs_locations failed;"
1633 "%s is not contained in %s\n", path, rootpath);
1634 *stat = nfserr_notsupp;
1635 return NULL;
1636 }
1637
1638 return path + strlen(rootpath);
1639 }
1640
1641 /*
1642 * encode a fs_locations structure
1643 */
1644 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1645 struct svc_export *exp,
1646 __be32 **pp, int *buflen)
1647 {
1648 __be32 status;
1649 int i;
1650 __be32 *p = *pp;
1651 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1652 char *root = nfsd4_path(rqstp, exp, &status);
1653
1654 if (status)
1655 return status;
1656 status = nfsd4_encode_components('/', root, &p, buflen);
1657 if (status)
1658 return status;
1659 if ((*buflen -= 4) < 0)
1660 return nfserr_resource;
1661 WRITE32(fslocs->locations_count);
1662 for (i=0; i<fslocs->locations_count; i++) {
1663 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1664 &p, buflen);
1665 if (status)
1666 return status;
1667 }
1668 *pp = p;
1669 return 0;
1670 }
1671
1672 static u32 nfs4_ftypes[16] = {
1673 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1674 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1675 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1676 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1677 };
1678
1679 static __be32
1680 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1681 __be32 **p, int *buflen)
1682 {
1683 int status;
1684
1685 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1686 return nfserr_resource;
1687 if (whotype != NFS4_ACL_WHO_NAMED)
1688 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1689 else if (group)
1690 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1691 else
1692 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1693 if (status < 0)
1694 return nfserrno(status);
1695 *p = xdr_encode_opaque(*p, NULL, status);
1696 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1697 BUG_ON(*buflen < 0);
1698 return 0;
1699 }
1700
1701 static inline __be32
1702 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1703 {
1704 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1705 }
1706
1707 static inline __be32
1708 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1709 {
1710 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1711 }
1712
1713 static inline __be32
1714 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1715 __be32 **p, int *buflen)
1716 {
1717 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1718 }
1719
1720 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1721 FATTR4_WORD0_RDATTR_ERROR)
1722 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1723
1724 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1725 {
1726 /* As per referral draft: */
1727 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1728 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1729 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1730 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1731 *rdattr_err = NFSERR_MOVED;
1732 else
1733 return nfserr_moved;
1734 }
1735 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1736 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1737 return 0;
1738 }
1739
1740 /*
1741 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1742 * ourselves.
1743 *
1744 * @countp is the buffer size in _words_; upon successful return this becomes
1745 * replaced with the number of words written.
1746 */
1747 __be32
1748 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1749 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1750 struct svc_rqst *rqstp, int ignore_crossmnt)
1751 {
1752 u32 bmval0 = bmval[0];
1753 u32 bmval1 = bmval[1];
1754 u32 bmval2 = bmval[2];
1755 struct kstat stat;
1756 struct svc_fh tempfh;
1757 struct kstatfs statfs;
1758 int buflen = *countp << 2;
1759 __be32 *attrlenp;
1760 u32 dummy;
1761 u64 dummy64;
1762 u32 rdattr_err = 0;
1763 __be32 *p = buffer;
1764 __be32 status;
1765 int err;
1766 int aclsupport = 0;
1767 struct nfs4_acl *acl = NULL;
1768 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1769 u32 minorversion = resp->cstate.minorversion;
1770
1771 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1772 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1773 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1774 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1775
1776 if (exp->ex_fslocs.migrated) {
1777 BUG_ON(bmval[2]);
1778 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1779 if (status)
1780 goto out;
1781 }
1782
1783 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1784 if (err)
1785 goto out_nfserr;
1786 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1787 FATTR4_WORD0_MAXNAME)) ||
1788 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1789 FATTR4_WORD1_SPACE_TOTAL))) {
1790 err = vfs_statfs(dentry, &statfs);
1791 if (err)
1792 goto out_nfserr;
1793 }
1794 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1795 fh_init(&tempfh, NFS4_FHSIZE);
1796 status = fh_compose(&tempfh, exp, dentry, NULL);
1797 if (status)
1798 goto out;
1799 fhp = &tempfh;
1800 }
1801 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1802 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1803 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1804 aclsupport = (err == 0);
1805 if (bmval0 & FATTR4_WORD0_ACL) {
1806 if (err == -EOPNOTSUPP)
1807 bmval0 &= ~FATTR4_WORD0_ACL;
1808 else if (err == -EINVAL) {
1809 status = nfserr_attrnotsupp;
1810 goto out;
1811 } else if (err != 0)
1812 goto out_nfserr;
1813 }
1814 }
1815 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1816 if (exp->ex_fslocs.locations == NULL) {
1817 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1818 }
1819 }
1820 if ((buflen -= 16) < 0)
1821 goto out_resource;
1822
1823 if (unlikely(bmval2)) {
1824 WRITE32(3);
1825 WRITE32(bmval0);
1826 WRITE32(bmval1);
1827 WRITE32(bmval2);
1828 } else if (likely(bmval1)) {
1829 WRITE32(2);
1830 WRITE32(bmval0);
1831 WRITE32(bmval1);
1832 } else {
1833 WRITE32(1);
1834 WRITE32(bmval0);
1835 }
1836 attrlenp = p++; /* to be backfilled later */
1837
1838 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1839 u32 word0 = nfsd_suppattrs0(minorversion);
1840 u32 word1 = nfsd_suppattrs1(minorversion);
1841 u32 word2 = nfsd_suppattrs2(minorversion);
1842
1843 if ((buflen -= 12) < 0)
1844 goto out_resource;
1845 if (!aclsupport)
1846 word0 &= ~FATTR4_WORD0_ACL;
1847 if (!exp->ex_fslocs.locations)
1848 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1849 if (!word2) {
1850 WRITE32(2);
1851 WRITE32(word0);
1852 WRITE32(word1);
1853 } else {
1854 WRITE32(3);
1855 WRITE32(word0);
1856 WRITE32(word1);
1857 WRITE32(word2);
1858 }
1859 }
1860 if (bmval0 & FATTR4_WORD0_TYPE) {
1861 if ((buflen -= 4) < 0)
1862 goto out_resource;
1863 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1864 if (dummy == NF4BAD)
1865 goto out_serverfault;
1866 WRITE32(dummy);
1867 }
1868 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1869 if ((buflen -= 4) < 0)
1870 goto out_resource;
1871 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1872 WRITE32(NFS4_FH_PERSISTENT);
1873 else
1874 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1875 }
1876 if (bmval0 & FATTR4_WORD0_CHANGE) {
1877 /*
1878 * Note: This _must_ be consistent with the scheme for writing
1879 * change_info, so any changes made here must be reflected there
1880 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1881 * macro above.)
1882 */
1883 if ((buflen -= 8) < 0)
1884 goto out_resource;
1885 WRITE32(stat.ctime.tv_sec);
1886 WRITE32(stat.ctime.tv_nsec);
1887 }
1888 if (bmval0 & FATTR4_WORD0_SIZE) {
1889 if ((buflen -= 8) < 0)
1890 goto out_resource;
1891 WRITE64(stat.size);
1892 }
1893 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1894 if ((buflen -= 4) < 0)
1895 goto out_resource;
1896 WRITE32(1);
1897 }
1898 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1899 if ((buflen -= 4) < 0)
1900 goto out_resource;
1901 WRITE32(1);
1902 }
1903 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1904 if ((buflen -= 4) < 0)
1905 goto out_resource;
1906 WRITE32(0);
1907 }
1908 if (bmval0 & FATTR4_WORD0_FSID) {
1909 if ((buflen -= 16) < 0)
1910 goto out_resource;
1911 if (exp->ex_fslocs.migrated) {
1912 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1913 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1914 } else switch(fsid_source(fhp)) {
1915 case FSIDSOURCE_FSID:
1916 WRITE64((u64)exp->ex_fsid);
1917 WRITE64((u64)0);
1918 break;
1919 case FSIDSOURCE_DEV:
1920 WRITE32(0);
1921 WRITE32(MAJOR(stat.dev));
1922 WRITE32(0);
1923 WRITE32(MINOR(stat.dev));
1924 break;
1925 case FSIDSOURCE_UUID:
1926 WRITEMEM(exp->ex_uuid, 16);
1927 break;
1928 }
1929 }
1930 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1931 if ((buflen -= 4) < 0)
1932 goto out_resource;
1933 WRITE32(0);
1934 }
1935 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1936 if ((buflen -= 4) < 0)
1937 goto out_resource;
1938 WRITE32(NFSD_LEASE_TIME);
1939 }
1940 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1941 if ((buflen -= 4) < 0)
1942 goto out_resource;
1943 WRITE32(rdattr_err);
1944 }
1945 if (bmval0 & FATTR4_WORD0_ACL) {
1946 struct nfs4_ace *ace;
1947
1948 if (acl == NULL) {
1949 if ((buflen -= 4) < 0)
1950 goto out_resource;
1951
1952 WRITE32(0);
1953 goto out_acl;
1954 }
1955 if ((buflen -= 4) < 0)
1956 goto out_resource;
1957 WRITE32(acl->naces);
1958
1959 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1960 if ((buflen -= 4*3) < 0)
1961 goto out_resource;
1962 WRITE32(ace->type);
1963 WRITE32(ace->flag);
1964 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1965 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1966 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1967 &p, &buflen);
1968 if (status == nfserr_resource)
1969 goto out_resource;
1970 if (status)
1971 goto out;
1972 }
1973 }
1974 out_acl:
1975 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1976 if ((buflen -= 4) < 0)
1977 goto out_resource;
1978 WRITE32(aclsupport ?
1979 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1980 }
1981 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1982 if ((buflen -= 4) < 0)
1983 goto out_resource;
1984 WRITE32(1);
1985 }
1986 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1987 if ((buflen -= 4) < 0)
1988 goto out_resource;
1989 WRITE32(1);
1990 }
1991 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1992 if ((buflen -= 4) < 0)
1993 goto out_resource;
1994 WRITE32(1);
1995 }
1996 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1997 if ((buflen -= 4) < 0)
1998 goto out_resource;
1999 WRITE32(1);
2000 }
2001 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2002 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2003 if (buflen < 0)
2004 goto out_resource;
2005 WRITE32(fhp->fh_handle.fh_size);
2006 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2007 }
2008 if (bmval0 & FATTR4_WORD0_FILEID) {
2009 if ((buflen -= 8) < 0)
2010 goto out_resource;
2011 WRITE64(stat.ino);
2012 }
2013 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2014 if ((buflen -= 8) < 0)
2015 goto out_resource;
2016 WRITE64((u64) statfs.f_ffree);
2017 }
2018 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2019 if ((buflen -= 8) < 0)
2020 goto out_resource;
2021 WRITE64((u64) statfs.f_ffree);
2022 }
2023 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2024 if ((buflen -= 8) < 0)
2025 goto out_resource;
2026 WRITE64((u64) statfs.f_files);
2027 }
2028 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2029 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2030 if (status == nfserr_resource)
2031 goto out_resource;
2032 if (status)
2033 goto out;
2034 }
2035 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2036 if ((buflen -= 4) < 0)
2037 goto out_resource;
2038 WRITE32(1);
2039 }
2040 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2041 if ((buflen -= 8) < 0)
2042 goto out_resource;
2043 WRITE64(~(u64)0);
2044 }
2045 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2046 if ((buflen -= 4) < 0)
2047 goto out_resource;
2048 WRITE32(255);
2049 }
2050 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2051 if ((buflen -= 4) < 0)
2052 goto out_resource;
2053 WRITE32(statfs.f_namelen);
2054 }
2055 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2056 if ((buflen -= 8) < 0)
2057 goto out_resource;
2058 WRITE64((u64) svc_max_payload(rqstp));
2059 }
2060 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2061 if ((buflen -= 8) < 0)
2062 goto out_resource;
2063 WRITE64((u64) svc_max_payload(rqstp));
2064 }
2065 if (bmval1 & FATTR4_WORD1_MODE) {
2066 if ((buflen -= 4) < 0)
2067 goto out_resource;
2068 WRITE32(stat.mode & S_IALLUGO);
2069 }
2070 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2071 if ((buflen -= 4) < 0)
2072 goto out_resource;
2073 WRITE32(1);
2074 }
2075 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2076 if ((buflen -= 4) < 0)
2077 goto out_resource;
2078 WRITE32(stat.nlink);
2079 }
2080 if (bmval1 & FATTR4_WORD1_OWNER) {
2081 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2082 if (status == nfserr_resource)
2083 goto out_resource;
2084 if (status)
2085 goto out;
2086 }
2087 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2088 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2089 if (status == nfserr_resource)
2090 goto out_resource;
2091 if (status)
2092 goto out;
2093 }
2094 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2095 if ((buflen -= 8) < 0)
2096 goto out_resource;
2097 WRITE32((u32) MAJOR(stat.rdev));
2098 WRITE32((u32) MINOR(stat.rdev));
2099 }
2100 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2101 if ((buflen -= 8) < 0)
2102 goto out_resource;
2103 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2104 WRITE64(dummy64);
2105 }
2106 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2107 if ((buflen -= 8) < 0)
2108 goto out_resource;
2109 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2110 WRITE64(dummy64);
2111 }
2112 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2113 if ((buflen -= 8) < 0)
2114 goto out_resource;
2115 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2116 WRITE64(dummy64);
2117 }
2118 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2119 if ((buflen -= 8) < 0)
2120 goto out_resource;
2121 dummy64 = (u64)stat.blocks << 9;
2122 WRITE64(dummy64);
2123 }
2124 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2125 if ((buflen -= 12) < 0)
2126 goto out_resource;
2127 WRITE32(0);
2128 WRITE32(stat.atime.tv_sec);
2129 WRITE32(stat.atime.tv_nsec);
2130 }
2131 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2132 if ((buflen -= 12) < 0)
2133 goto out_resource;
2134 WRITE32(0);
2135 WRITE32(1);
2136 WRITE32(0);
2137 }
2138 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2139 if ((buflen -= 12) < 0)
2140 goto out_resource;
2141 WRITE32(0);
2142 WRITE32(stat.ctime.tv_sec);
2143 WRITE32(stat.ctime.tv_nsec);
2144 }
2145 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2146 if ((buflen -= 12) < 0)
2147 goto out_resource;
2148 WRITE32(0);
2149 WRITE32(stat.mtime.tv_sec);
2150 WRITE32(stat.mtime.tv_nsec);
2151 }
2152 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2153 if ((buflen -= 8) < 0)
2154 goto out_resource;
2155 /*
2156 * Get parent's attributes if not ignoring crossmount
2157 * and this is the root of a cross-mounted filesystem.
2158 */
2159 if (ignore_crossmnt == 0 &&
2160 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
2161 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
2162 exp->ex_path.mnt->mnt_mountpoint, &stat);
2163 if (err)
2164 goto out_nfserr;
2165 }
2166 WRITE64(stat.ino);
2167 }
2168 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2169 WRITE32(3);
2170 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2171 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2172 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2173 }
2174
2175 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2176 *countp = p - buffer;
2177 status = nfs_ok;
2178
2179 out:
2180 kfree(acl);
2181 if (fhp == &tempfh)
2182 fh_put(&tempfh);
2183 return status;
2184 out_nfserr:
2185 status = nfserrno(err);
2186 goto out;
2187 out_resource:
2188 *countp = 0;
2189 status = nfserr_resource;
2190 goto out;
2191 out_serverfault:
2192 status = nfserr_serverfault;
2193 goto out;
2194 }
2195
2196 static inline int attributes_need_mount(u32 *bmval)
2197 {
2198 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2199 return 1;
2200 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2201 return 1;
2202 return 0;
2203 }
2204
2205 static __be32
2206 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2207 const char *name, int namlen, __be32 *p, int *buflen)
2208 {
2209 struct svc_export *exp = cd->rd_fhp->fh_export;
2210 struct dentry *dentry;
2211 __be32 nfserr;
2212 int ignore_crossmnt = 0;
2213
2214 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2215 if (IS_ERR(dentry))
2216 return nfserrno(PTR_ERR(dentry));
2217
2218 exp_get(exp);
2219 /*
2220 * In the case of a mountpoint, the client may be asking for
2221 * attributes that are only properties of the underlying filesystem
2222 * as opposed to the cross-mounted file system. In such a case,
2223 * we will not follow the cross mount and will fill the attribtutes
2224 * directly from the mountpoint dentry.
2225 */
2226 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
2227 ignore_crossmnt = 1;
2228 else if (d_mountpoint(dentry)) {
2229 int err;
2230
2231 /*
2232 * Why the heck aren't we just using nfsd_lookup??
2233 * Different "."/".." handling? Something else?
2234 * At least, add a comment here to explain....
2235 */
2236 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2237 if (err) {
2238 nfserr = nfserrno(err);
2239 goto out_put;
2240 }
2241 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2242 if (nfserr)
2243 goto out_put;
2244
2245 }
2246 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2247 cd->rd_rqstp, ignore_crossmnt);
2248 out_put:
2249 dput(dentry);
2250 exp_put(exp);
2251 return nfserr;
2252 }
2253
2254 static __be32 *
2255 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2256 {
2257 __be32 *attrlenp;
2258
2259 if (buflen < 6)
2260 return NULL;
2261 *p++ = htonl(2);
2262 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2263 *p++ = htonl(0); /* bmval1 */
2264
2265 attrlenp = p++;
2266 *p++ = nfserr; /* no htonl */
2267 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2268 return p;
2269 }
2270
2271 static int
2272 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2273 loff_t offset, u64 ino, unsigned int d_type)
2274 {
2275 struct readdir_cd *ccd = ccdv;
2276 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2277 int buflen;
2278 __be32 *p = cd->buffer;
2279 __be32 nfserr = nfserr_toosmall;
2280
2281 /* In nfsv4, "." and ".." never make it onto the wire.. */
2282 if (name && isdotent(name, namlen)) {
2283 cd->common.err = nfs_ok;
2284 return 0;
2285 }
2286
2287 if (cd->offset)
2288 xdr_encode_hyper(cd->offset, (u64) offset);
2289
2290 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2291 if (buflen < 0)
2292 goto fail;
2293
2294 *p++ = xdr_one; /* mark entry present */
2295 cd->offset = p; /* remember pointer */
2296 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2297 p = xdr_encode_array(p, name, namlen); /* name length & name */
2298
2299 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2300 switch (nfserr) {
2301 case nfs_ok:
2302 p += buflen;
2303 break;
2304 case nfserr_resource:
2305 nfserr = nfserr_toosmall;
2306 goto fail;
2307 case nfserr_dropit:
2308 goto fail;
2309 default:
2310 /*
2311 * If the client requested the RDATTR_ERROR attribute,
2312 * we stuff the error code into this attribute
2313 * and continue. If this attribute was not requested,
2314 * then in accordance with the spec, we fail the
2315 * entire READDIR operation(!)
2316 */
2317 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2318 goto fail;
2319 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2320 if (p == NULL) {
2321 nfserr = nfserr_toosmall;
2322 goto fail;
2323 }
2324 }
2325 cd->buflen -= (p - cd->buffer);
2326 cd->buffer = p;
2327 cd->common.err = nfs_ok;
2328 return 0;
2329 fail:
2330 cd->common.err = nfserr;
2331 return -EINVAL;
2332 }
2333
2334 static void
2335 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2336 {
2337 ENCODE_HEAD;
2338
2339 RESERVE_SPACE(sizeof(stateid_t));
2340 WRITE32(sid->si_generation);
2341 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2342 ADJUST_ARGS();
2343 }
2344
2345 static __be32
2346 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2347 {
2348 ENCODE_HEAD;
2349
2350 if (!nfserr) {
2351 RESERVE_SPACE(8);
2352 WRITE32(access->ac_supported);
2353 WRITE32(access->ac_resp_access);
2354 ADJUST_ARGS();
2355 }
2356 return nfserr;
2357 }
2358
2359 static __be32
2360 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2361 {
2362 ENCODE_SEQID_OP_HEAD;
2363
2364 if (!nfserr)
2365 nfsd4_encode_stateid(resp, &close->cl_stateid);
2366
2367 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2368 return nfserr;
2369 }
2370
2371
2372 static __be32
2373 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2374 {
2375 ENCODE_HEAD;
2376
2377 if (!nfserr) {
2378 RESERVE_SPACE(8);
2379 WRITEMEM(commit->co_verf.data, 8);
2380 ADJUST_ARGS();
2381 }
2382 return nfserr;
2383 }
2384
2385 static __be32
2386 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2387 {
2388 ENCODE_HEAD;
2389
2390 if (!nfserr) {
2391 RESERVE_SPACE(32);
2392 WRITECINFO(create->cr_cinfo);
2393 WRITE32(2);
2394 WRITE32(create->cr_bmval[0]);
2395 WRITE32(create->cr_bmval[1]);
2396 ADJUST_ARGS();
2397 }
2398 return nfserr;
2399 }
2400
2401 static __be32
2402 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2403 {
2404 struct svc_fh *fhp = getattr->ga_fhp;
2405 int buflen;
2406
2407 if (nfserr)
2408 return nfserr;
2409
2410 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2411 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2412 resp->p, &buflen, getattr->ga_bmval,
2413 resp->rqstp, 0);
2414 if (!nfserr)
2415 resp->p += buflen;
2416 return nfserr;
2417 }
2418
2419 static __be32
2420 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2421 {
2422 struct svc_fh *fhp = *fhpp;
2423 unsigned int len;
2424 ENCODE_HEAD;
2425
2426 if (!nfserr) {
2427 len = fhp->fh_handle.fh_size;
2428 RESERVE_SPACE(len + 4);
2429 WRITE32(len);
2430 WRITEMEM(&fhp->fh_handle.fh_base, len);
2431 ADJUST_ARGS();
2432 }
2433 return nfserr;
2434 }
2435
2436 /*
2437 * Including all fields other than the name, a LOCK4denied structure requires
2438 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2439 */
2440 static void
2441 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2442 {
2443 ENCODE_HEAD;
2444
2445 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2446 WRITE64(ld->ld_start);
2447 WRITE64(ld->ld_length);
2448 WRITE32(ld->ld_type);
2449 if (ld->ld_sop) {
2450 WRITEMEM(&ld->ld_clientid, 8);
2451 WRITE32(ld->ld_sop->so_owner.len);
2452 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2453 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2454 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2455 WRITE64((u64)0); /* clientid */
2456 WRITE32(0); /* length of owner name */
2457 }
2458 ADJUST_ARGS();
2459 }
2460
2461 static __be32
2462 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2463 {
2464 ENCODE_SEQID_OP_HEAD;
2465
2466 if (!nfserr)
2467 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2468 else if (nfserr == nfserr_denied)
2469 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2470
2471 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2472 return nfserr;
2473 }
2474
2475 static __be32
2476 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2477 {
2478 if (nfserr == nfserr_denied)
2479 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2480 return nfserr;
2481 }
2482
2483 static __be32
2484 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2485 {
2486 ENCODE_SEQID_OP_HEAD;
2487
2488 if (!nfserr)
2489 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2490
2491 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2492 return nfserr;
2493 }
2494
2495
2496 static __be32
2497 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2498 {
2499 ENCODE_HEAD;
2500
2501 if (!nfserr) {
2502 RESERVE_SPACE(20);
2503 WRITECINFO(link->li_cinfo);
2504 ADJUST_ARGS();
2505 }
2506 return nfserr;
2507 }
2508
2509
2510 static __be32
2511 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2512 {
2513 ENCODE_HEAD;
2514 ENCODE_SEQID_OP_HEAD;
2515
2516 if (nfserr)
2517 goto out;
2518
2519 nfsd4_encode_stateid(resp, &open->op_stateid);
2520 RESERVE_SPACE(40);
2521 WRITECINFO(open->op_cinfo);
2522 WRITE32(open->op_rflags);
2523 WRITE32(2);
2524 WRITE32(open->op_bmval[0]);
2525 WRITE32(open->op_bmval[1]);
2526 WRITE32(open->op_delegate_type);
2527 ADJUST_ARGS();
2528
2529 switch (open->op_delegate_type) {
2530 case NFS4_OPEN_DELEGATE_NONE:
2531 break;
2532 case NFS4_OPEN_DELEGATE_READ:
2533 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2534 RESERVE_SPACE(20);
2535 WRITE32(open->op_recall);
2536
2537 /*
2538 * TODO: ACE's in delegations
2539 */
2540 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2541 WRITE32(0);
2542 WRITE32(0);
2543 WRITE32(0); /* XXX: is NULL principal ok? */
2544 ADJUST_ARGS();
2545 break;
2546 case NFS4_OPEN_DELEGATE_WRITE:
2547 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2548 RESERVE_SPACE(32);
2549 WRITE32(0);
2550
2551 /*
2552 * TODO: space_limit's in delegations
2553 */
2554 WRITE32(NFS4_LIMIT_SIZE);
2555 WRITE32(~(u32)0);
2556 WRITE32(~(u32)0);
2557
2558 /*
2559 * TODO: ACE's in delegations
2560 */
2561 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2562 WRITE32(0);
2563 WRITE32(0);
2564 WRITE32(0); /* XXX: is NULL principal ok? */
2565 ADJUST_ARGS();
2566 break;
2567 default:
2568 BUG();
2569 }
2570 /* XXX save filehandle here */
2571 out:
2572 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2573 return nfserr;
2574 }
2575
2576 static __be32
2577 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2578 {
2579 ENCODE_SEQID_OP_HEAD;
2580
2581 if (!nfserr)
2582 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2583
2584 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2585 return nfserr;
2586 }
2587
2588 static __be32
2589 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2590 {
2591 ENCODE_SEQID_OP_HEAD;
2592
2593 if (!nfserr)
2594 nfsd4_encode_stateid(resp, &od->od_stateid);
2595
2596 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2597 return nfserr;
2598 }
2599
2600 static __be32
2601 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2602 struct nfsd4_read *read)
2603 {
2604 u32 eof;
2605 int v, pn;
2606 unsigned long maxcount;
2607 long len;
2608 ENCODE_HEAD;
2609
2610 if (nfserr)
2611 return nfserr;
2612 if (resp->xbuf->page_len)
2613 return nfserr_resource;
2614
2615 RESERVE_SPACE(8); /* eof flag and byte count */
2616
2617 maxcount = svc_max_payload(resp->rqstp);
2618 if (maxcount > read->rd_length)
2619 maxcount = read->rd_length;
2620
2621 len = maxcount;
2622 v = 0;
2623 while (len > 0) {
2624 pn = resp->rqstp->rq_resused++;
2625 resp->rqstp->rq_vec[v].iov_base =
2626 page_address(resp->rqstp->rq_respages[pn]);
2627 resp->rqstp->rq_vec[v].iov_len =
2628 len < PAGE_SIZE ? len : PAGE_SIZE;
2629 v++;
2630 len -= PAGE_SIZE;
2631 }
2632 read->rd_vlen = v;
2633
2634 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2635 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2636 &maxcount);
2637
2638 if (nfserr == nfserr_symlink)
2639 nfserr = nfserr_inval;
2640 if (nfserr)
2641 return nfserr;
2642 eof = (read->rd_offset + maxcount >=
2643 read->rd_fhp->fh_dentry->d_inode->i_size);
2644
2645 WRITE32(eof);
2646 WRITE32(maxcount);
2647 ADJUST_ARGS();
2648 resp->xbuf->head[0].iov_len = (char*)p
2649 - (char*)resp->xbuf->head[0].iov_base;
2650 resp->xbuf->page_len = maxcount;
2651
2652 /* Use rest of head for padding and remaining ops: */
2653 resp->xbuf->tail[0].iov_base = p;
2654 resp->xbuf->tail[0].iov_len = 0;
2655 if (maxcount&3) {
2656 RESERVE_SPACE(4);
2657 WRITE32(0);
2658 resp->xbuf->tail[0].iov_base += maxcount&3;
2659 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2660 ADJUST_ARGS();
2661 }
2662 return 0;
2663 }
2664
2665 static __be32
2666 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2667 {
2668 int maxcount;
2669 char *page;
2670 ENCODE_HEAD;
2671
2672 if (nfserr)
2673 return nfserr;
2674 if (resp->xbuf->page_len)
2675 return nfserr_resource;
2676
2677 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2678
2679 maxcount = PAGE_SIZE;
2680 RESERVE_SPACE(4);
2681
2682 /*
2683 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2684 * if they would overflow the buffer. Is this kosher in NFSv4? If
2685 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2686 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2687 */
2688 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2689 if (nfserr == nfserr_isdir)
2690 return nfserr_inval;
2691 if (nfserr)
2692 return nfserr;
2693
2694 WRITE32(maxcount);
2695 ADJUST_ARGS();
2696 resp->xbuf->head[0].iov_len = (char*)p
2697 - (char*)resp->xbuf->head[0].iov_base;
2698 resp->xbuf->page_len = maxcount;
2699
2700 /* Use rest of head for padding and remaining ops: */
2701 resp->xbuf->tail[0].iov_base = p;
2702 resp->xbuf->tail[0].iov_len = 0;
2703 if (maxcount&3) {
2704 RESERVE_SPACE(4);
2705 WRITE32(0);
2706 resp->xbuf->tail[0].iov_base += maxcount&3;
2707 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2708 ADJUST_ARGS();
2709 }
2710 return 0;
2711 }
2712
2713 static __be32
2714 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2715 {
2716 int maxcount;
2717 loff_t offset;
2718 __be32 *page, *savep, *tailbase;
2719 ENCODE_HEAD;
2720
2721 if (nfserr)
2722 return nfserr;
2723 if (resp->xbuf->page_len)
2724 return nfserr_resource;
2725
2726 RESERVE_SPACE(8); /* verifier */
2727 savep = p;
2728
2729 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2730 WRITE32(0);
2731 WRITE32(0);
2732 ADJUST_ARGS();
2733 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2734 tailbase = p;
2735
2736 maxcount = PAGE_SIZE;
2737 if (maxcount > readdir->rd_maxcount)
2738 maxcount = readdir->rd_maxcount;
2739
2740 /*
2741 * Convert from bytes to words, account for the two words already
2742 * written, make sure to leave two words at the end for the next
2743 * pointer and eof field.
2744 */
2745 maxcount = (maxcount >> 2) - 4;
2746 if (maxcount < 0) {
2747 nfserr = nfserr_toosmall;
2748 goto err_no_verf;
2749 }
2750
2751 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2752 readdir->common.err = 0;
2753 readdir->buflen = maxcount;
2754 readdir->buffer = page;
2755 readdir->offset = NULL;
2756
2757 offset = readdir->rd_cookie;
2758 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2759 &offset,
2760 &readdir->common, nfsd4_encode_dirent);
2761 if (nfserr == nfs_ok &&
2762 readdir->common.err == nfserr_toosmall &&
2763 readdir->buffer == page)
2764 nfserr = nfserr_toosmall;
2765 if (nfserr == nfserr_symlink)
2766 nfserr = nfserr_notdir;
2767 if (nfserr)
2768 goto err_no_verf;
2769
2770 if (readdir->offset)
2771 xdr_encode_hyper(readdir->offset, offset);
2772
2773 p = readdir->buffer;
2774 *p++ = 0; /* no more entries */
2775 *p++ = htonl(readdir->common.err == nfserr_eof);
2776 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2777 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2778
2779 /* Use rest of head for padding and remaining ops: */
2780 resp->xbuf->tail[0].iov_base = tailbase;
2781 resp->xbuf->tail[0].iov_len = 0;
2782 resp->p = resp->xbuf->tail[0].iov_base;
2783 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2784
2785 return 0;
2786 err_no_verf:
2787 p = savep;
2788 ADJUST_ARGS();
2789 return nfserr;
2790 }
2791
2792 static __be32
2793 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2794 {
2795 ENCODE_HEAD;
2796
2797 if (!nfserr) {
2798 RESERVE_SPACE(20);
2799 WRITECINFO(remove->rm_cinfo);
2800 ADJUST_ARGS();
2801 }
2802 return nfserr;
2803 }
2804
2805 static __be32
2806 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2807 {
2808 ENCODE_HEAD;
2809
2810 if (!nfserr) {
2811 RESERVE_SPACE(40);
2812 WRITECINFO(rename->rn_sinfo);
2813 WRITECINFO(rename->rn_tinfo);
2814 ADJUST_ARGS();
2815 }
2816 return nfserr;
2817 }
2818
2819 static __be32
2820 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2821 struct nfsd4_secinfo *secinfo)
2822 {
2823 int i = 0;
2824 struct svc_export *exp = secinfo->si_exp;
2825 u32 nflavs;
2826 struct exp_flavor_info *flavs;
2827 struct exp_flavor_info def_flavs[2];
2828 ENCODE_HEAD;
2829
2830 if (nfserr)
2831 goto out;
2832 if (exp->ex_nflavors) {
2833 flavs = exp->ex_flavors;
2834 nflavs = exp->ex_nflavors;
2835 } else { /* Handling of some defaults in absence of real secinfo: */
2836 flavs = def_flavs;
2837 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2838 nflavs = 2;
2839 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2840 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2841 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2842 nflavs = 1;
2843 flavs[0].pseudoflavor
2844 = svcauth_gss_flavor(exp->ex_client);
2845 } else {
2846 nflavs = 1;
2847 flavs[0].pseudoflavor
2848 = exp->ex_client->flavour->flavour;
2849 }
2850 }
2851
2852 RESERVE_SPACE(4);
2853 WRITE32(nflavs);
2854 ADJUST_ARGS();
2855 for (i = 0; i < nflavs; i++) {
2856 u32 flav = flavs[i].pseudoflavor;
2857 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2858
2859 if (gm) {
2860 RESERVE_SPACE(4);
2861 WRITE32(RPC_AUTH_GSS);
2862 ADJUST_ARGS();
2863 RESERVE_SPACE(4 + gm->gm_oid.len);
2864 WRITE32(gm->gm_oid.len);
2865 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2866 ADJUST_ARGS();
2867 RESERVE_SPACE(4);
2868 WRITE32(0); /* qop */
2869 ADJUST_ARGS();
2870 RESERVE_SPACE(4);
2871 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2872 ADJUST_ARGS();
2873 gss_mech_put(gm);
2874 } else {
2875 RESERVE_SPACE(4);
2876 WRITE32(flav);
2877 ADJUST_ARGS();
2878 }
2879 }
2880 out:
2881 if (exp)
2882 exp_put(exp);
2883 return nfserr;
2884 }
2885
2886 /*
2887 * The SETATTR encode routine is special -- it always encodes a bitmap,
2888 * regardless of the error status.
2889 */
2890 static __be32
2891 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2892 {
2893 ENCODE_HEAD;
2894
2895 RESERVE_SPACE(12);
2896 if (nfserr) {
2897 WRITE32(2);
2898 WRITE32(0);
2899 WRITE32(0);
2900 }
2901 else {
2902 WRITE32(2);
2903 WRITE32(setattr->sa_bmval[0]);
2904 WRITE32(setattr->sa_bmval[1]);
2905 }
2906 ADJUST_ARGS();
2907 return nfserr;
2908 }
2909
2910 static __be32
2911 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2912 {
2913 ENCODE_HEAD;
2914
2915 if (!nfserr) {
2916 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2917 WRITEMEM(&scd->se_clientid, 8);
2918 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2919 ADJUST_ARGS();
2920 }
2921 else if (nfserr == nfserr_clid_inuse) {
2922 RESERVE_SPACE(8);
2923 WRITE32(0);
2924 WRITE32(0);
2925 ADJUST_ARGS();
2926 }
2927 return nfserr;
2928 }
2929
2930 static __be32
2931 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2932 {
2933 ENCODE_HEAD;
2934
2935 if (!nfserr) {
2936 RESERVE_SPACE(16);
2937 WRITE32(write->wr_bytes_written);
2938 WRITE32(write->wr_how_written);
2939 WRITEMEM(write->wr_verifier.data, 8);
2940 ADJUST_ARGS();
2941 }
2942 return nfserr;
2943 }
2944
2945 static __be32
2946 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2947 struct nfsd4_exchange_id *exid)
2948 {
2949 ENCODE_HEAD;
2950 char *major_id;
2951 char *server_scope;
2952 int major_id_sz;
2953 int server_scope_sz;
2954 uint64_t minor_id = 0;
2955
2956 if (nfserr)
2957 return nfserr;
2958
2959 major_id = utsname()->nodename;
2960 major_id_sz = strlen(major_id);
2961 server_scope = utsname()->nodename;
2962 server_scope_sz = strlen(server_scope);
2963
2964 RESERVE_SPACE(
2965 8 /* eir_clientid */ +
2966 4 /* eir_sequenceid */ +
2967 4 /* eir_flags */ +
2968 4 /* spr_how (SP4_NONE) */ +
2969 8 /* so_minor_id */ +
2970 4 /* so_major_id.len */ +
2971 (XDR_QUADLEN(major_id_sz) * 4) +
2972 4 /* eir_server_scope.len */ +
2973 (XDR_QUADLEN(server_scope_sz) * 4) +
2974 4 /* eir_server_impl_id.count (0) */);
2975
2976 WRITEMEM(&exid->clientid, 8);
2977 WRITE32(exid->seqid);
2978 WRITE32(exid->flags);
2979
2980 /* state_protect4_r. Currently only support SP4_NONE */
2981 BUG_ON(exid->spa_how != SP4_NONE);
2982 WRITE32(exid->spa_how);
2983
2984 /* The server_owner struct */
2985 WRITE64(minor_id); /* Minor id */
2986 /* major id */
2987 WRITE32(major_id_sz);
2988 WRITEMEM(major_id, major_id_sz);
2989
2990 /* Server scope */
2991 WRITE32(server_scope_sz);
2992 WRITEMEM(server_scope, server_scope_sz);
2993
2994 /* Implementation id */
2995 WRITE32(0); /* zero length nfs_impl_id4 array */
2996 ADJUST_ARGS();
2997 return 0;
2998 }
2999
3000 static __be32
3001 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
3002 struct nfsd4_create_session *sess)
3003 {
3004 ENCODE_HEAD;
3005
3006 if (nfserr)
3007 return nfserr;
3008
3009 RESERVE_SPACE(24);
3010 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3011 WRITE32(sess->seqid);
3012 WRITE32(sess->flags);
3013 ADJUST_ARGS();
3014
3015 RESERVE_SPACE(28);
3016 WRITE32(0); /* headerpadsz */
3017 WRITE32(sess->fore_channel.maxreq_sz);
3018 WRITE32(sess->fore_channel.maxresp_sz);
3019 WRITE32(sess->fore_channel.maxresp_cached);
3020 WRITE32(sess->fore_channel.maxops);
3021 WRITE32(sess->fore_channel.maxreqs);
3022 WRITE32(sess->fore_channel.nr_rdma_attrs);
3023 ADJUST_ARGS();
3024
3025 if (sess->fore_channel.nr_rdma_attrs) {
3026 RESERVE_SPACE(4);
3027 WRITE32(sess->fore_channel.rdma_attrs);
3028 ADJUST_ARGS();
3029 }
3030
3031 RESERVE_SPACE(28);
3032 WRITE32(0); /* headerpadsz */
3033 WRITE32(sess->back_channel.maxreq_sz);
3034 WRITE32(sess->back_channel.maxresp_sz);
3035 WRITE32(sess->back_channel.maxresp_cached);
3036 WRITE32(sess->back_channel.maxops);
3037 WRITE32(sess->back_channel.maxreqs);
3038 WRITE32(sess->back_channel.nr_rdma_attrs);
3039 ADJUST_ARGS();
3040
3041 if (sess->back_channel.nr_rdma_attrs) {
3042 RESERVE_SPACE(4);
3043 WRITE32(sess->back_channel.rdma_attrs);
3044 ADJUST_ARGS();
3045 }
3046 return 0;
3047 }
3048
3049 static __be32
3050 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3051 struct nfsd4_destroy_session *destroy_session)
3052 {
3053 return nfserr;
3054 }
3055
3056 __be32
3057 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3058 struct nfsd4_sequence *seq)
3059 {
3060 ENCODE_HEAD;
3061
3062 if (nfserr)
3063 return nfserr;
3064
3065 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3066 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3067 WRITE32(seq->seqid);
3068 WRITE32(seq->slotid);
3069 WRITE32(seq->maxslots);
3070 /*
3071 * FIXME: for now:
3072 * target_maxslots = maxslots
3073 * status_flags = 0
3074 */
3075 WRITE32(seq->maxslots);
3076 WRITE32(0);
3077
3078 ADJUST_ARGS();
3079 return 0;
3080 }
3081
3082 static __be32
3083 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3084 {
3085 return nfserr;
3086 }
3087
3088 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3089
3090 /*
3091 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3092 * since we don't need to filter out obsolete ops as this is
3093 * done in the decoding phase.
3094 */
3095 static nfsd4_enc nfsd4_enc_ops[] = {
3096 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3097 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3098 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3099 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3100 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3101 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3102 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3103 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3104 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3105 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3106 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3107 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3108 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3109 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3110 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3111 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3112 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3113 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3114 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3115 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3116 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3117 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3118 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3119 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3120 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3121 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3122 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3123 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3124 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3125 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3126 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3127 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3128 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3129 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3130 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3131 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3132 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3133
3134 /* NFSv4.1 operations */
3135 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3136 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3137 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3138 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3139 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3140 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3141 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3142 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3143 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3144 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3145 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3146 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3147 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
3148 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3149 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3150 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3151 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3152 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3153 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3154 };
3155
3156 /*
3157 * Calculate the total amount of memory that the compound response has taken
3158 * after encoding the current operation.
3159 *
3160 * pad: add on 8 bytes for the next operation's op_code and status so that
3161 * there is room to cache a failure on the next operation.
3162 *
3163 * Compare this length to the session se_fmaxresp_cached.
3164 *
3165 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3166 * will be at least a page and will therefore hold the xdr_buf head.
3167 */
3168 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3169 {
3170 int status = 0;
3171 struct xdr_buf *xb = &resp->rqstp->rq_res;
3172 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3173 struct nfsd4_session *session = NULL;
3174 struct nfsd4_slot *slot = resp->cstate.slot;
3175 u32 length, tlen = 0, pad = 8;
3176
3177 if (!nfsd4_has_session(&resp->cstate))
3178 return status;
3179
3180 session = resp->cstate.session;
3181 if (session == NULL || slot->sl_cache_entry.ce_cachethis == 0)
3182 return status;
3183
3184 if (resp->opcnt >= args->opcnt)
3185 pad = 0; /* this is the last operation */
3186
3187 if (xb->page_len == 0) {
3188 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3189 } else {
3190 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3191 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3192
3193 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3194 }
3195 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3196 length, xb->page_len, tlen, pad);
3197
3198 if (length <= session->se_fmaxresp_cached)
3199 return status;
3200 else
3201 return nfserr_rep_too_big_to_cache;
3202 }
3203
3204 void
3205 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3206 {
3207 __be32 *statp;
3208 ENCODE_HEAD;
3209
3210 RESERVE_SPACE(8);
3211 WRITE32(op->opnum);
3212 statp = p++; /* to be backfilled at the end */
3213 ADJUST_ARGS();
3214
3215 if (op->opnum == OP_ILLEGAL)
3216 goto status;
3217 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3218 !nfsd4_enc_ops[op->opnum]);
3219 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3220 /* nfsd4_check_drc_limit guarantees enough room for error status */
3221 if (!op->status && nfsd4_check_drc_limit(resp))
3222 op->status = nfserr_rep_too_big_to_cache;
3223 status:
3224 /*
3225 * Note: We write the status directly, instead of using WRITE32(),
3226 * since it is already in network byte order.
3227 */
3228 *statp = op->status;
3229 }
3230
3231 /*
3232 * Encode the reply stored in the stateowner reply cache
3233 *
3234 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3235 * previously sent already encoded operation.
3236 *
3237 * called with nfs4_lock_state() held
3238 */
3239 void
3240 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3241 {
3242 ENCODE_HEAD;
3243 struct nfs4_replay *rp = op->replay;
3244
3245 BUG_ON(!rp);
3246
3247 RESERVE_SPACE(8);
3248 WRITE32(op->opnum);
3249 *p++ = rp->rp_status; /* already xdr'ed */
3250 ADJUST_ARGS();
3251
3252 RESERVE_SPACE(rp->rp_buflen);
3253 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3254 ADJUST_ARGS();
3255 }
3256
3257 /*
3258 * END OF "GENERIC" ENCODE ROUTINES.
3259 */
3260
3261 int
3262 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3263 {
3264 return xdr_ressize_check(rqstp, p);
3265 }
3266
3267 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3268 {
3269 if (args->ops != args->iops) {
3270 kfree(args->ops);
3271 args->ops = args->iops;
3272 }
3273 kfree(args->tmpp);
3274 args->tmpp = NULL;
3275 while (args->to_free) {
3276 struct tmpbuf *tb = args->to_free;
3277 args->to_free = tb->next;
3278 tb->release(tb->buf);
3279 kfree(tb);
3280 }
3281 }
3282
3283 int
3284 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3285 {
3286 __be32 status;
3287
3288 args->p = p;
3289 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3290 args->pagelist = rqstp->rq_arg.pages;
3291 args->pagelen = rqstp->rq_arg.page_len;
3292 args->tmpp = NULL;
3293 args->to_free = NULL;
3294 args->ops = args->iops;
3295 args->rqstp = rqstp;
3296
3297 status = nfsd4_decode_compound(args);
3298 if (status) {
3299 nfsd4_release_compoundargs(args);
3300 }
3301 return !status;
3302 }
3303
3304 int
3305 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3306 {
3307 /*
3308 * All that remains is to write the tag and operation count...
3309 */
3310 struct kvec *iov;
3311 p = resp->tagp;
3312 *p++ = htonl(resp->taglen);
3313 memcpy(p, resp->tag, resp->taglen);
3314 p += XDR_QUADLEN(resp->taglen);
3315 *p++ = htonl(resp->opcnt);
3316
3317 if (rqstp->rq_res.page_len)
3318 iov = &rqstp->rq_res.tail[0];
3319 else
3320 iov = &rqstp->rq_res.head[0];
3321 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3322 BUG_ON(iov->iov_len > PAGE_SIZE);
3323 if (nfsd4_has_session(&resp->cstate)) {
3324 if (resp->cstate.status == nfserr_replay_cache &&
3325 !nfsd4_not_cached(resp)) {
3326 iov->iov_len = resp->cstate.iovlen;
3327 } else {
3328 nfsd4_store_cache_entry(resp);
3329 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3330 resp->cstate.slot->sl_inuse = 0;
3331 }
3332 if (resp->cstate.session)
3333 nfsd4_put_session(resp->cstate.session);
3334 }
3335 return 1;
3336 }
3337
3338 /*
3339 * Local variables:
3340 * c-basic-offset: 8
3341 * End:
3342 */
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