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USB: pl2303: New vendor and product id
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / nfsd / nfs4xdr.c
blob34ccf815ea8aa48f854a8ad6f9d15e64c2c59e51
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/slab.h>
44 #include <linux/namei.h>
45 #include <linux/statfs.h>
46 #include <linux/utsname.h>
47 #include <linux/nfsd_idmap.h>
48 #include <linux/nfs4_acl.h>
49 #include <linux/sunrpc/svcauth_gss.h>
50
51 #include "xdr4.h"
52 #include "vfs.h"
53
54 #define NFSDDBG_FACILITY NFSDDBG_XDR
55
56 /*
57 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
58 * directory in order to indicate to the client that a filesystem boundary is present
59 * We use a fixed fsid for a referral
60 */
61 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
62 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
63
64 static __be32
65 check_filename(char *str, int len, __be32 err)
66 {
67 int i;
68
69 if (len == 0)
70 return nfserr_inval;
71 if (isdotent(str, len))
72 return err;
73 for (i = 0; i < len; i++)
74 if (str[i] == '/')
75 return err;
76 return 0;
77 }
78
79 #define DECODE_HEAD \
80 __be32 *p; \
81 __be32 status
82 #define DECODE_TAIL \
83 status = 0; \
84 out: \
85 return status; \
86 xdr_error: \
87 dprintk("NFSD: xdr error (%s:%d)\n", \
88 __FILE__, __LINE__); \
89 status = nfserr_bad_xdr; \
90 goto out
91
92 #define READ32(x) (x) = ntohl(*p++)
93 #define READ64(x) do { \
94 (x) = (u64)ntohl(*p++) << 32; \
95 (x) |= ntohl(*p++); \
96 } while (0)
97 #define READTIME(x) do { \
98 p++; \
99 (x) = ntohl(*p++); \
100 p++; \
101 } while (0)
102 #define READMEM(x,nbytes) do { \
103 x = (char *)p; \
104 p += XDR_QUADLEN(nbytes); \
105 } while (0)
106 #define SAVEMEM(x,nbytes) do { \
107 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
108 savemem(argp, p, nbytes) : \
109 (char *)p)) { \
110 dprintk("NFSD: xdr error (%s:%d)\n", \
111 __FILE__, __LINE__); \
112 goto xdr_error; \
113 } \
114 p += XDR_QUADLEN(nbytes); \
115 } while (0)
116 #define COPYMEM(x,nbytes) do { \
117 memcpy((x), p, nbytes); \
118 p += XDR_QUADLEN(nbytes); \
119 } while (0)
120
121 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
122 #define READ_BUF(nbytes) do { \
123 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
124 p = argp->p; \
125 argp->p += XDR_QUADLEN(nbytes); \
126 } else if (!(p = read_buf(argp, nbytes))) { \
127 dprintk("NFSD: xdr error (%s:%d)\n", \
128 __FILE__, __LINE__); \
129 goto xdr_error; \
130 } \
131 } while (0)
132
133 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
134 {
135 /* We want more bytes than seem to be available.
136 * Maybe we need a new page, maybe we have just run out
137 */
138 unsigned int avail = (char *)argp->end - (char *)argp->p;
139 __be32 *p;
140 if (avail + argp->pagelen < nbytes)
141 return NULL;
142 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
143 return NULL;
144 /* ok, we can do it with the current plus the next page */
145 if (nbytes <= sizeof(argp->tmp))
146 p = argp->tmp;
147 else {
148 kfree(argp->tmpp);
149 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
150 if (!p)
151 return NULL;
152
153 }
154 /*
155 * The following memcpy is safe because read_buf is always
156 * called with nbytes > avail, and the two cases above both
157 * guarantee p points to at least nbytes bytes.
158 */
159 memcpy(p, argp->p, avail);
160 /* step to next page */
161 argp->p = page_address(argp->pagelist[0]);
162 argp->pagelist++;
163 if (argp->pagelen < PAGE_SIZE) {
164 argp->end = argp->p + (argp->pagelen>>2);
165 argp->pagelen = 0;
166 } else {
167 argp->end = argp->p + (PAGE_SIZE>>2);
168 argp->pagelen -= PAGE_SIZE;
169 }
170 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
171 argp->p += XDR_QUADLEN(nbytes - avail);
172 return p;
173 }
174
175 static int zero_clientid(clientid_t *clid)
176 {
177 return (clid->cl_boot == 0) && (clid->cl_id == 0);
178 }
179
180 static int
181 defer_free(struct nfsd4_compoundargs *argp,
182 void (*release)(const void *), void *p)
183 {
184 struct tmpbuf *tb;
185
186 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
187 if (!tb)
188 return -ENOMEM;
189 tb->buf = p;
190 tb->release = release;
191 tb->next = argp->to_free;
192 argp->to_free = tb;
193 return 0;
194 }
195
196 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
197 {
198 if (p == argp->tmp) {
199 p = kmalloc(nbytes, GFP_KERNEL);
200 if (!p)
201 return NULL;
202 memcpy(p, argp->tmp, nbytes);
203 } else {
204 BUG_ON(p != argp->tmpp);
205 argp->tmpp = NULL;
206 }
207 if (defer_free(argp, kfree, p)) {
208 kfree(p);
209 return NULL;
210 } else
211 return (char *)p;
212 }
213
214 static __be32
215 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
216 {
217 u32 bmlen;
218 DECODE_HEAD;
219
220 bmval[0] = 0;
221 bmval[1] = 0;
222 bmval[2] = 0;
223
224 READ_BUF(4);
225 READ32(bmlen);
226 if (bmlen > 1000)
227 goto xdr_error;
228
229 READ_BUF(bmlen << 2);
230 if (bmlen > 0)
231 READ32(bmval[0]);
232 if (bmlen > 1)
233 READ32(bmval[1]);
234 if (bmlen > 2)
235 READ32(bmval[2]);
236
237 DECODE_TAIL;
238 }
239
240 static __be32
241 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
242 struct iattr *iattr, struct nfs4_acl **acl)
243 {
244 int expected_len, len = 0;
245 u32 dummy32;
246 char *buf;
247 int host_err;
248
249 DECODE_HEAD;
250 iattr->ia_valid = 0;
251 if ((status = nfsd4_decode_bitmap(argp, bmval)))
252 return status;
253
254 READ_BUF(4);
255 READ32(expected_len);
256
257 if (bmval[0] & FATTR4_WORD0_SIZE) {
258 READ_BUF(8);
259 len += 8;
260 READ64(iattr->ia_size);
261 iattr->ia_valid |= ATTR_SIZE;
262 }
263 if (bmval[0] & FATTR4_WORD0_ACL) {
264 int nace;
265 struct nfs4_ace *ace;
266
267 READ_BUF(4); len += 4;
268 READ32(nace);
269
270 if (nace > NFS4_ACL_MAX)
271 return nfserr_resource;
272
273 *acl = nfs4_acl_new(nace);
274 if (*acl == NULL) {
275 host_err = -ENOMEM;
276 goto out_nfserr;
277 }
278 defer_free(argp, kfree, *acl);
279
280 (*acl)->naces = nace;
281 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
282 READ_BUF(16); len += 16;
283 READ32(ace->type);
284 READ32(ace->flag);
285 READ32(ace->access_mask);
286 READ32(dummy32);
287 READ_BUF(dummy32);
288 len += XDR_QUADLEN(dummy32) << 2;
289 READMEM(buf, dummy32);
290 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
291 host_err = 0;
292 if (ace->whotype != NFS4_ACL_WHO_NAMED)
293 ace->who = 0;
294 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
295 host_err = nfsd_map_name_to_gid(argp->rqstp,
296 buf, dummy32, &ace->who);
297 else
298 host_err = nfsd_map_name_to_uid(argp->rqstp,
299 buf, dummy32, &ace->who);
300 if (host_err)
301 goto out_nfserr;
302 }
303 } else
304 *acl = NULL;
305 if (bmval[1] & FATTR4_WORD1_MODE) {
306 READ_BUF(4);
307 len += 4;
308 READ32(iattr->ia_mode);
309 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
310 iattr->ia_valid |= ATTR_MODE;
311 }
312 if (bmval[1] & FATTR4_WORD1_OWNER) {
313 READ_BUF(4);
314 len += 4;
315 READ32(dummy32);
316 READ_BUF(dummy32);
317 len += (XDR_QUADLEN(dummy32) << 2);
318 READMEM(buf, dummy32);
319 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
320 goto out_nfserr;
321 iattr->ia_valid |= ATTR_UID;
322 }
323 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
324 READ_BUF(4);
325 len += 4;
326 READ32(dummy32);
327 READ_BUF(dummy32);
328 len += (XDR_QUADLEN(dummy32) << 2);
329 READMEM(buf, dummy32);
330 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
331 goto out_nfserr;
332 iattr->ia_valid |= ATTR_GID;
333 }
334 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
335 READ_BUF(4);
336 len += 4;
337 READ32(dummy32);
338 switch (dummy32) {
339 case NFS4_SET_TO_CLIENT_TIME:
340 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
341 all 32 bits of 'nseconds'. */
342 READ_BUF(12);
343 len += 12;
344 READ32(dummy32);
345 if (dummy32)
346 return nfserr_inval;
347 READ32(iattr->ia_atime.tv_sec);
348 READ32(iattr->ia_atime.tv_nsec);
349 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
350 return nfserr_inval;
351 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
352 break;
353 case NFS4_SET_TO_SERVER_TIME:
354 iattr->ia_valid |= ATTR_ATIME;
355 break;
356 default:
357 goto xdr_error;
358 }
359 }
360 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
361 READ_BUF(4);
362 len += 4;
363 READ32(dummy32);
364 switch (dummy32) {
365 case NFS4_SET_TO_CLIENT_TIME:
366 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
367 all 32 bits of 'nseconds'. */
368 READ_BUF(12);
369 len += 12;
370 READ32(dummy32);
371 if (dummy32)
372 return nfserr_inval;
373 READ32(iattr->ia_mtime.tv_sec);
374 READ32(iattr->ia_mtime.tv_nsec);
375 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
376 return nfserr_inval;
377 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
378 break;
379 case NFS4_SET_TO_SERVER_TIME:
380 iattr->ia_valid |= ATTR_MTIME;
381 break;
382 default:
383 goto xdr_error;
384 }
385 }
386 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
387 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
388 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
389 READ_BUF(expected_len - len);
390 else if (len != expected_len)
391 goto xdr_error;
392
393 DECODE_TAIL;
394
395 out_nfserr:
396 status = nfserrno(host_err);
397 goto out;
398 }
399
400 static __be32
401 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
402 {
403 DECODE_HEAD;
404
405 READ_BUF(sizeof(stateid_t));
406 READ32(sid->si_generation);
407 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
408
409 DECODE_TAIL;
410 }
411
412 static __be32
413 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
414 {
415 DECODE_HEAD;
416
417 READ_BUF(4);
418 READ32(access->ac_req_access);
419
420 DECODE_TAIL;
421 }
422
423 static __be32
424 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
425 {
426 DECODE_HEAD;
427
428 close->cl_stateowner = NULL;
429 READ_BUF(4);
430 READ32(close->cl_seqid);
431 return nfsd4_decode_stateid(argp, &close->cl_stateid);
432
433 DECODE_TAIL;
434 }
435
436
437 static __be32
438 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
439 {
440 DECODE_HEAD;
441
442 READ_BUF(12);
443 READ64(commit->co_offset);
444 READ32(commit->co_count);
445
446 DECODE_TAIL;
447 }
448
449 static __be32
450 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
451 {
452 DECODE_HEAD;
453
454 READ_BUF(4);
455 READ32(create->cr_type);
456 switch (create->cr_type) {
457 case NF4LNK:
458 READ_BUF(4);
459 READ32(create->cr_linklen);
460 READ_BUF(create->cr_linklen);
461 SAVEMEM(create->cr_linkname, create->cr_linklen);
462 break;
463 case NF4BLK:
464 case NF4CHR:
465 READ_BUF(8);
466 READ32(create->cr_specdata1);
467 READ32(create->cr_specdata2);
468 break;
469 case NF4SOCK:
470 case NF4FIFO:
471 case NF4DIR:
472 default:
473 break;
474 }
475
476 READ_BUF(4);
477 READ32(create->cr_namelen);
478 READ_BUF(create->cr_namelen);
479 SAVEMEM(create->cr_name, create->cr_namelen);
480 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
481 return status;
482
483 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
484 &create->cr_acl);
485 if (status)
486 goto out;
487
488 DECODE_TAIL;
489 }
490
491 static inline __be32
492 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
493 {
494 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
495 }
496
497 static inline __be32
498 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
499 {
500 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
501 }
502
503 static __be32
504 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
505 {
506 DECODE_HEAD;
507
508 READ_BUF(4);
509 READ32(link->li_namelen);
510 READ_BUF(link->li_namelen);
511 SAVEMEM(link->li_name, link->li_namelen);
512 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
513 return status;
514
515 DECODE_TAIL;
516 }
517
518 static __be32
519 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
520 {
521 DECODE_HEAD;
522
523 lock->lk_replay_owner = NULL;
524 /*
525 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
526 */
527 READ_BUF(28);
528 READ32(lock->lk_type);
529 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
530 goto xdr_error;
531 READ32(lock->lk_reclaim);
532 READ64(lock->lk_offset);
533 READ64(lock->lk_length);
534 READ32(lock->lk_is_new);
535
536 if (lock->lk_is_new) {
537 READ_BUF(4);
538 READ32(lock->lk_new_open_seqid);
539 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
540 if (status)
541 return status;
542 READ_BUF(8 + sizeof(clientid_t));
543 READ32(lock->lk_new_lock_seqid);
544 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
545 READ32(lock->lk_new_owner.len);
546 READ_BUF(lock->lk_new_owner.len);
547 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
548 } else {
549 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
550 if (status)
551 return status;
552 READ_BUF(4);
553 READ32(lock->lk_old_lock_seqid);
554 }
555
556 DECODE_TAIL;
557 }
558
559 static __be32
560 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
561 {
562 DECODE_HEAD;
563
564 READ_BUF(32);
565 READ32(lockt->lt_type);
566 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
567 goto xdr_error;
568 READ64(lockt->lt_offset);
569 READ64(lockt->lt_length);
570 COPYMEM(&lockt->lt_clientid, 8);
571 READ32(lockt->lt_owner.len);
572 READ_BUF(lockt->lt_owner.len);
573 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
574
575 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
576 return nfserr_inval;
577 DECODE_TAIL;
578 }
579
580 static __be32
581 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
582 {
583 DECODE_HEAD;
584
585 locku->lu_stateowner = NULL;
586 READ_BUF(8);
587 READ32(locku->lu_type);
588 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
589 goto xdr_error;
590 READ32(locku->lu_seqid);
591 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
592 if (status)
593 return status;
594 READ_BUF(16);
595 READ64(locku->lu_offset);
596 READ64(locku->lu_length);
597
598 DECODE_TAIL;
599 }
600
601 static __be32
602 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
603 {
604 DECODE_HEAD;
605
606 READ_BUF(4);
607 READ32(lookup->lo_len);
608 READ_BUF(lookup->lo_len);
609 SAVEMEM(lookup->lo_name, lookup->lo_len);
610 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
611 return status;
612
613 DECODE_TAIL;
614 }
615
616 static __be32
617 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
618 {
619 DECODE_HEAD;
620
621 memset(open->op_bmval, 0, sizeof(open->op_bmval));
622 open->op_iattr.ia_valid = 0;
623 open->op_stateowner = NULL;
624
625 /* seqid, share_access, share_deny, clientid, ownerlen */
626 READ_BUF(16 + sizeof(clientid_t));
627 READ32(open->op_seqid);
628 READ32(open->op_share_access);
629 READ32(open->op_share_deny);
630 COPYMEM(&open->op_clientid, sizeof(clientid_t));
631 READ32(open->op_owner.len);
632
633 /* owner, open_flag */
634 READ_BUF(open->op_owner.len + 4);
635 SAVEMEM(open->op_owner.data, open->op_owner.len);
636 READ32(open->op_create);
637 switch (open->op_create) {
638 case NFS4_OPEN_NOCREATE:
639 break;
640 case NFS4_OPEN_CREATE:
641 READ_BUF(4);
642 READ32(open->op_createmode);
643 switch (open->op_createmode) {
644 case NFS4_CREATE_UNCHECKED:
645 case NFS4_CREATE_GUARDED:
646 status = nfsd4_decode_fattr(argp, open->op_bmval,
647 &open->op_iattr, &open->op_acl);
648 if (status)
649 goto out;
650 break;
651 case NFS4_CREATE_EXCLUSIVE:
652 READ_BUF(8);
653 COPYMEM(open->op_verf.data, 8);
654 break;
655 case NFS4_CREATE_EXCLUSIVE4_1:
656 if (argp->minorversion < 1)
657 goto xdr_error;
658 READ_BUF(8);
659 COPYMEM(open->op_verf.data, 8);
660 status = nfsd4_decode_fattr(argp, open->op_bmval,
661 &open->op_iattr, &open->op_acl);
662 if (status)
663 goto out;
664 break;
665 default:
666 goto xdr_error;
667 }
668 break;
669 default:
670 goto xdr_error;
671 }
672
673 /* open_claim */
674 READ_BUF(4);
675 READ32(open->op_claim_type);
676 switch (open->op_claim_type) {
677 case NFS4_OPEN_CLAIM_NULL:
678 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
679 READ_BUF(4);
680 READ32(open->op_fname.len);
681 READ_BUF(open->op_fname.len);
682 SAVEMEM(open->op_fname.data, open->op_fname.len);
683 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
684 return status;
685 break;
686 case NFS4_OPEN_CLAIM_PREVIOUS:
687 READ_BUF(4);
688 READ32(open->op_delegate_type);
689 break;
690 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
691 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
692 if (status)
693 return status;
694 READ_BUF(4);
695 READ32(open->op_fname.len);
696 READ_BUF(open->op_fname.len);
697 SAVEMEM(open->op_fname.data, open->op_fname.len);
698 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
699 return status;
700 break;
701 default:
702 goto xdr_error;
703 }
704
705 DECODE_TAIL;
706 }
707
708 static __be32
709 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
710 {
711 DECODE_HEAD;
712
713 open_conf->oc_stateowner = NULL;
714 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
715 if (status)
716 return status;
717 READ_BUF(4);
718 READ32(open_conf->oc_seqid);
719
720 DECODE_TAIL;
721 }
722
723 static __be32
724 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
725 {
726 DECODE_HEAD;
727
728 open_down->od_stateowner = NULL;
729 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
730 if (status)
731 return status;
732 READ_BUF(12);
733 READ32(open_down->od_seqid);
734 READ32(open_down->od_share_access);
735 READ32(open_down->od_share_deny);
736
737 DECODE_TAIL;
738 }
739
740 static __be32
741 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
742 {
743 DECODE_HEAD;
744
745 READ_BUF(4);
746 READ32(putfh->pf_fhlen);
747 if (putfh->pf_fhlen > NFS4_FHSIZE)
748 goto xdr_error;
749 READ_BUF(putfh->pf_fhlen);
750 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
751
752 DECODE_TAIL;
753 }
754
755 static __be32
756 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
757 {
758 DECODE_HEAD;
759
760 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
761 if (status)
762 return status;
763 READ_BUF(12);
764 READ64(read->rd_offset);
765 READ32(read->rd_length);
766
767 DECODE_TAIL;
768 }
769
770 static __be32
771 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
772 {
773 DECODE_HEAD;
774
775 READ_BUF(24);
776 READ64(readdir->rd_cookie);
777 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
778 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
779 READ32(readdir->rd_maxcount);
780 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
781 goto out;
782
783 DECODE_TAIL;
784 }
785
786 static __be32
787 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
788 {
789 DECODE_HEAD;
790
791 READ_BUF(4);
792 READ32(remove->rm_namelen);
793 READ_BUF(remove->rm_namelen);
794 SAVEMEM(remove->rm_name, remove->rm_namelen);
795 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
796 return status;
797
798 DECODE_TAIL;
799 }
800
801 static __be32
802 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
803 {
804 DECODE_HEAD;
805
806 READ_BUF(4);
807 READ32(rename->rn_snamelen);
808 READ_BUF(rename->rn_snamelen + 4);
809 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
810 READ32(rename->rn_tnamelen);
811 READ_BUF(rename->rn_tnamelen);
812 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
813 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
814 return status;
815 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
816 return status;
817
818 DECODE_TAIL;
819 }
820
821 static __be32
822 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
823 {
824 DECODE_HEAD;
825
826 READ_BUF(sizeof(clientid_t));
827 COPYMEM(clientid, sizeof(clientid_t));
828
829 DECODE_TAIL;
830 }
831
832 static __be32
833 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
834 struct nfsd4_secinfo *secinfo)
835 {
836 DECODE_HEAD;
837
838 READ_BUF(4);
839 READ32(secinfo->si_namelen);
840 READ_BUF(secinfo->si_namelen);
841 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
842 status = check_filename(secinfo->si_name, secinfo->si_namelen,
843 nfserr_noent);
844 if (status)
845 return status;
846 DECODE_TAIL;
847 }
848
849 static __be32
850 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
851 {
852 __be32 status;
853
854 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
855 if (status)
856 return status;
857 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
858 &setattr->sa_acl);
859 }
860
861 static __be32
862 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
863 {
864 DECODE_HEAD;
865
866 READ_BUF(12);
867 COPYMEM(setclientid->se_verf.data, 8);
868 READ32(setclientid->se_namelen);
869
870 READ_BUF(setclientid->se_namelen + 8);
871 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
872 READ32(setclientid->se_callback_prog);
873 READ32(setclientid->se_callback_netid_len);
874
875 READ_BUF(setclientid->se_callback_netid_len + 4);
876 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
877 READ32(setclientid->se_callback_addr_len);
878
879 READ_BUF(setclientid->se_callback_addr_len + 4);
880 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
881 READ32(setclientid->se_callback_ident);
882
883 DECODE_TAIL;
884 }
885
886 static __be32
887 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
888 {
889 DECODE_HEAD;
890
891 READ_BUF(8 + sizeof(nfs4_verifier));
892 COPYMEM(&scd_c->sc_clientid, 8);
893 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
894
895 DECODE_TAIL;
896 }
897
898 /* Also used for NVERIFY */
899 static __be32
900 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
901 {
902 #if 0
903 struct nfsd4_compoundargs save = {
904 .p = argp->p,
905 .end = argp->end,
906 .rqstp = argp->rqstp,
907 };
908 u32 ve_bmval[2];
909 struct iattr ve_iattr; /* request */
910 struct nfs4_acl *ve_acl; /* request */
911 #endif
912 DECODE_HEAD;
913
914 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
915 goto out;
916
917 /* For convenience's sake, we compare raw xdr'd attributes in
918 * nfsd4_proc_verify; however we still decode here just to return
919 * correct error in case of bad xdr. */
920 #if 0
921 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
922 if (status == nfserr_inval) {
923 status = nfserrno(status);
924 goto out;
925 }
926 #endif
927 READ_BUF(4);
928 READ32(verify->ve_attrlen);
929 READ_BUF(verify->ve_attrlen);
930 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
931
932 DECODE_TAIL;
933 }
934
935 static __be32
936 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
937 {
938 int avail;
939 int v;
940 int len;
941 DECODE_HEAD;
942
943 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
944 if (status)
945 return status;
946 READ_BUF(16);
947 READ64(write->wr_offset);
948 READ32(write->wr_stable_how);
949 if (write->wr_stable_how > 2)
950 goto xdr_error;
951 READ32(write->wr_buflen);
952
953 /* Sorry .. no magic macros for this.. *
954 * READ_BUF(write->wr_buflen);
955 * SAVEMEM(write->wr_buf, write->wr_buflen);
956 */
957 avail = (char*)argp->end - (char*)argp->p;
958 if (avail + argp->pagelen < write->wr_buflen) {
959 dprintk("NFSD: xdr error (%s:%d)\n",
960 __FILE__, __LINE__);
961 goto xdr_error;
962 }
963 argp->rqstp->rq_vec[0].iov_base = p;
964 argp->rqstp->rq_vec[0].iov_len = avail;
965 v = 0;
966 len = write->wr_buflen;
967 while (len > argp->rqstp->rq_vec[v].iov_len) {
968 len -= argp->rqstp->rq_vec[v].iov_len;
969 v++;
970 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
971 argp->pagelist++;
972 if (argp->pagelen >= PAGE_SIZE) {
973 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
974 argp->pagelen -= PAGE_SIZE;
975 } else {
976 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
977 argp->pagelen -= len;
978 }
979 }
980 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
981 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
982 argp->rqstp->rq_vec[v].iov_len = len;
983 write->wr_vlen = v+1;
984
985 DECODE_TAIL;
986 }
987
988 static __be32
989 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
990 {
991 DECODE_HEAD;
992
993 READ_BUF(12);
994 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
995 READ32(rlockowner->rl_owner.len);
996 READ_BUF(rlockowner->rl_owner.len);
997 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
998
999 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1000 return nfserr_inval;
1001 DECODE_TAIL;
1002 }
1003
1004 static __be32
1005 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1006 struct nfsd4_exchange_id *exid)
1007 {
1008 int dummy;
1009 DECODE_HEAD;
1010
1011 READ_BUF(NFS4_VERIFIER_SIZE);
1012 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1013
1014 READ_BUF(4);
1015 READ32(exid->clname.len);
1016
1017 READ_BUF(exid->clname.len);
1018 SAVEMEM(exid->clname.data, exid->clname.len);
1019
1020 READ_BUF(4);
1021 READ32(exid->flags);
1022
1023 /* Ignore state_protect4_a */
1024 READ_BUF(4);
1025 READ32(exid->spa_how);
1026 switch (exid->spa_how) {
1027 case SP4_NONE:
1028 break;
1029 case SP4_MACH_CRED:
1030 /* spo_must_enforce */
1031 READ_BUF(4);
1032 READ32(dummy);
1033 READ_BUF(dummy * 4);
1034 p += dummy;
1035
1036 /* spo_must_allow */
1037 READ_BUF(4);
1038 READ32(dummy);
1039 READ_BUF(dummy * 4);
1040 p += dummy;
1041 break;
1042 case SP4_SSV:
1043 /* ssp_ops */
1044 READ_BUF(4);
1045 READ32(dummy);
1046 READ_BUF(dummy * 4);
1047 p += dummy;
1048
1049 READ_BUF(4);
1050 READ32(dummy);
1051 READ_BUF(dummy * 4);
1052 p += dummy;
1053
1054 /* ssp_hash_algs<> */
1055 READ_BUF(4);
1056 READ32(dummy);
1057 READ_BUF(dummy);
1058 p += XDR_QUADLEN(dummy);
1059
1060 /* ssp_encr_algs<> */
1061 READ_BUF(4);
1062 READ32(dummy);
1063 READ_BUF(dummy);
1064 p += XDR_QUADLEN(dummy);
1065
1066 /* ssp_window and ssp_num_gss_handles */
1067 READ_BUF(8);
1068 READ32(dummy);
1069 READ32(dummy);
1070 break;
1071 default:
1072 goto xdr_error;
1073 }
1074
1075 /* Ignore Implementation ID */
1076 READ_BUF(4); /* nfs_impl_id4 array length */
1077 READ32(dummy);
1078
1079 if (dummy > 1)
1080 goto xdr_error;
1081
1082 if (dummy == 1) {
1083 /* nii_domain */
1084 READ_BUF(4);
1085 READ32(dummy);
1086 READ_BUF(dummy);
1087 p += XDR_QUADLEN(dummy);
1088
1089 /* nii_name */
1090 READ_BUF(4);
1091 READ32(dummy);
1092 READ_BUF(dummy);
1093 p += XDR_QUADLEN(dummy);
1094
1095 /* nii_date */
1096 READ_BUF(12);
1097 p += 3;
1098 }
1099 DECODE_TAIL;
1100 }
1101
1102 static __be32
1103 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1104 struct nfsd4_create_session *sess)
1105 {
1106 DECODE_HEAD;
1107
1108 u32 dummy;
1109 char *machine_name;
1110 int i;
1111 int nr_secflavs;
1112
1113 READ_BUF(16);
1114 COPYMEM(&sess->clientid, 8);
1115 READ32(sess->seqid);
1116 READ32(sess->flags);
1117
1118 /* Fore channel attrs */
1119 READ_BUF(28);
1120 READ32(dummy); /* headerpadsz is always 0 */
1121 READ32(sess->fore_channel.maxreq_sz);
1122 READ32(sess->fore_channel.maxresp_sz);
1123 READ32(sess->fore_channel.maxresp_cached);
1124 READ32(sess->fore_channel.maxops);
1125 READ32(sess->fore_channel.maxreqs);
1126 READ32(sess->fore_channel.nr_rdma_attrs);
1127 if (sess->fore_channel.nr_rdma_attrs == 1) {
1128 READ_BUF(4);
1129 READ32(sess->fore_channel.rdma_attrs);
1130 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1131 dprintk("Too many fore channel attr bitmaps!\n");
1132 goto xdr_error;
1133 }
1134
1135 /* Back channel attrs */
1136 READ_BUF(28);
1137 READ32(dummy); /* headerpadsz is always 0 */
1138 READ32(sess->back_channel.maxreq_sz);
1139 READ32(sess->back_channel.maxresp_sz);
1140 READ32(sess->back_channel.maxresp_cached);
1141 READ32(sess->back_channel.maxops);
1142 READ32(sess->back_channel.maxreqs);
1143 READ32(sess->back_channel.nr_rdma_attrs);
1144 if (sess->back_channel.nr_rdma_attrs == 1) {
1145 READ_BUF(4);
1146 READ32(sess->back_channel.rdma_attrs);
1147 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1148 dprintk("Too many back channel attr bitmaps!\n");
1149 goto xdr_error;
1150 }
1151
1152 READ_BUF(8);
1153 READ32(sess->callback_prog);
1154
1155 /* callback_sec_params4 */
1156 READ32(nr_secflavs);
1157 for (i = 0; i < nr_secflavs; ++i) {
1158 READ_BUF(4);
1159 READ32(dummy);
1160 switch (dummy) {
1161 case RPC_AUTH_NULL:
1162 /* Nothing to read */
1163 break;
1164 case RPC_AUTH_UNIX:
1165 READ_BUF(8);
1166 /* stamp */
1167 READ32(dummy);
1168
1169 /* machine name */
1170 READ32(dummy);
1171 READ_BUF(dummy);
1172 SAVEMEM(machine_name, dummy);
1173
1174 /* uid, gid */
1175 READ_BUF(8);
1176 READ32(sess->uid);
1177 READ32(sess->gid);
1178
1179 /* more gids */
1180 READ_BUF(4);
1181 READ32(dummy);
1182 READ_BUF(dummy * 4);
1183 for (i = 0; i < dummy; ++i)
1184 READ32(dummy);
1185 break;
1186 case RPC_AUTH_GSS:
1187 dprintk("RPC_AUTH_GSS callback secflavor "
1188 "not supported!\n");
1189 READ_BUF(8);
1190 /* gcbp_service */
1191 READ32(dummy);
1192 /* gcbp_handle_from_server */
1193 READ32(dummy);
1194 READ_BUF(dummy);
1195 p += XDR_QUADLEN(dummy);
1196 /* gcbp_handle_from_client */
1197 READ_BUF(4);
1198 READ32(dummy);
1199 READ_BUF(dummy);
1200 p += XDR_QUADLEN(dummy);
1201 break;
1202 default:
1203 dprintk("Illegal callback secflavor\n");
1204 return nfserr_inval;
1205 }
1206 }
1207 DECODE_TAIL;
1208 }
1209
1210 static __be32
1211 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1212 struct nfsd4_destroy_session *destroy_session)
1213 {
1214 DECODE_HEAD;
1215 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1216 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1217
1218 DECODE_TAIL;
1219 }
1220
1221 static __be32
1222 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1223 struct nfsd4_sequence *seq)
1224 {
1225 DECODE_HEAD;
1226
1227 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1228 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1229 READ32(seq->seqid);
1230 READ32(seq->slotid);
1231 READ32(seq->maxslots);
1232 READ32(seq->cachethis);
1233
1234 DECODE_TAIL;
1235 }
1236
1237 static __be32
1238 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1239 {
1240 return nfs_ok;
1241 }
1242
1243 static __be32
1244 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1245 {
1246 return nfserr_notsupp;
1247 }
1248
1249 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1250
1251 static nfsd4_dec nfsd4_dec_ops[] = {
1252 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1253 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1254 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1255 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1256 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1257 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1258 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1259 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1260 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1261 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1262 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1263 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1264 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1265 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1266 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1267 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1268 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1269 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1270 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1271 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1272 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1273 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1274 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1275 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1276 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1277 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1278 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1279 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1280 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1281 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1282 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1283 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1284 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1285 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1286 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1287 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1288 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1289 };
1290
1291 static nfsd4_dec nfsd41_dec_ops[] = {
1292 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1293 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1294 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1295 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1296 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1297 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1298 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1299 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1300 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1301 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1302 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1303 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1304 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1305 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1306 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1307 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1308 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1309 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1310 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1311 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1312 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1313 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1314 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1315 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1316 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1317 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1318 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1319 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1320 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1321 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1322 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1323 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1324 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1325 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1326 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1327 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1328 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
1329
1330 /* new operations for NFSv4.1 */
1331 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1332 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_notsupp,
1333 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1334 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1335 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1336 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1337 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1338 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1339 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1340 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1341 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1342 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1343 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1344 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1345 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1346 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1347 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1348 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1349 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_notsupp,
1350 };
1351
1352 struct nfsd4_minorversion_ops {
1353 nfsd4_dec *decoders;
1354 int nops;
1355 };
1356
1357 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1358 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1359 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1360 };
1361
1362 static __be32
1363 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1364 {
1365 DECODE_HEAD;
1366 struct nfsd4_op *op;
1367 struct nfsd4_minorversion_ops *ops;
1368 int i;
1369
1370 /*
1371 * XXX: According to spec, we should check the tag
1372 * for UTF-8 compliance. I'm postponing this for
1373 * now because it seems that some clients do use
1374 * binary tags.
1375 */
1376 READ_BUF(4);
1377 READ32(argp->taglen);
1378 READ_BUF(argp->taglen + 8);
1379 SAVEMEM(argp->tag, argp->taglen);
1380 READ32(argp->minorversion);
1381 READ32(argp->opcnt);
1382
1383 if (argp->taglen > NFSD4_MAX_TAGLEN)
1384 goto xdr_error;
1385 if (argp->opcnt > 100)
1386 goto xdr_error;
1387
1388 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1389 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1390 if (!argp->ops) {
1391 argp->ops = argp->iops;
1392 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1393 goto xdr_error;
1394 }
1395 }
1396
1397 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1398 argp->opcnt = 0;
1399
1400 ops = &nfsd4_minorversion[argp->minorversion];
1401 for (i = 0; i < argp->opcnt; i++) {
1402 op = &argp->ops[i];
1403 op->replay = NULL;
1404
1405 /*
1406 * We can't use READ_BUF() here because we need to handle
1407 * a missing opcode as an OP_WRITE + 1. So we need to check
1408 * to see if we're truly at the end of our buffer or if there
1409 * is another page we need to flip to.
1410 */
1411
1412 if (argp->p == argp->end) {
1413 if (argp->pagelen < 4) {
1414 /* There isn't an opcode still on the wire */
1415 op->opnum = OP_WRITE + 1;
1416 op->status = nfserr_bad_xdr;
1417 argp->opcnt = i+1;
1418 break;
1419 }
1420
1421 /*
1422 * False alarm. We just hit a page boundary, but there
1423 * is still data available. Move pointer across page
1424 * boundary. *snip from READ_BUF*
1425 */
1426 argp->p = page_address(argp->pagelist[0]);
1427 argp->pagelist++;
1428 if (argp->pagelen < PAGE_SIZE) {
1429 argp->end = argp->p + (argp->pagelen>>2);
1430 argp->pagelen = 0;
1431 } else {
1432 argp->end = argp->p + (PAGE_SIZE>>2);
1433 argp->pagelen -= PAGE_SIZE;
1434 }
1435 }
1436 op->opnum = ntohl(*argp->p++);
1437
1438 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
1439 op->status = ops->decoders[op->opnum](argp, &op->u);
1440 else {
1441 op->opnum = OP_ILLEGAL;
1442 op->status = nfserr_op_illegal;
1443 }
1444
1445 if (op->status) {
1446 argp->opcnt = i+1;
1447 break;
1448 }
1449 }
1450
1451 DECODE_TAIL;
1452 }
1453
1454 #define WRITE32(n) *p++ = htonl(n)
1455 #define WRITE64(n) do { \
1456 *p++ = htonl((u32)((n) >> 32)); \
1457 *p++ = htonl((u32)(n)); \
1458 } while (0)
1459 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1460 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1461 memcpy(p, ptr, nbytes); \
1462 p += XDR_QUADLEN(nbytes); \
1463 }} while (0)
1464
1465 static void write32(__be32 **p, u32 n)
1466 {
1467 *(*p)++ = n;
1468 }
1469
1470 static void write64(__be32 **p, u64 n)
1471 {
1472 write32(p, (u32)(n >> 32));
1473 write32(p, (u32)n);
1474 }
1475
1476 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1477 {
1478 if (IS_I_VERSION(inode)) {
1479 write64(p, inode->i_version);
1480 } else {
1481 write32(p, stat->ctime.tv_sec);
1482 write32(p, stat->ctime.tv_nsec);
1483 }
1484 }
1485
1486 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1487 {
1488 write32(p, c->atomic);
1489 if (c->change_supported) {
1490 write64(p, c->before_change);
1491 write64(p, c->after_change);
1492 } else {
1493 write32(p, c->before_ctime_sec);
1494 write32(p, c->before_ctime_nsec);
1495 write32(p, c->after_ctime_sec);
1496 write32(p, c->after_ctime_nsec);
1497 }
1498 }
1499
1500 #define RESERVE_SPACE(nbytes) do { \
1501 p = resp->p; \
1502 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1503 } while (0)
1504 #define ADJUST_ARGS() resp->p = p
1505
1506 /*
1507 * Header routine to setup seqid operation replay cache
1508 */
1509 #define ENCODE_SEQID_OP_HEAD \
1510 __be32 *save; \
1511 \
1512 save = resp->p;
1513
1514 /*
1515 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1516 * is where sequence id's are incremented, and the replay cache is filled.
1517 * Note that we increment sequence id's here, at the last moment, so we're sure
1518 * we know whether the error to be returned is a sequence id mutating error.
1519 */
1520
1521 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1522 if (seqid_mutating_err(nfserr) && stateowner) { \
1523 stateowner->so_seqid++; \
1524 stateowner->so_replay.rp_status = nfserr; \
1525 stateowner->so_replay.rp_buflen = \
1526 (((char *)(resp)->p - (char *)save)); \
1527 memcpy(stateowner->so_replay.rp_buf, save, \
1528 stateowner->so_replay.rp_buflen); \
1529 } } while (0);
1530
1531 /* Encode as an array of strings the string given with components
1532 * separated @sep.
1533 */
1534 static __be32 nfsd4_encode_components(char sep, char *components,
1535 __be32 **pp, int *buflen)
1536 {
1537 __be32 *p = *pp;
1538 __be32 *countp = p;
1539 int strlen, count=0;
1540 char *str, *end;
1541
1542 dprintk("nfsd4_encode_components(%s)\n", components);
1543 if ((*buflen -= 4) < 0)
1544 return nfserr_resource;
1545 WRITE32(0); /* We will fill this in with @count later */
1546 end = str = components;
1547 while (*end) {
1548 for (; *end && (*end != sep); end++)
1549 ; /* Point to end of component */
1550 strlen = end - str;
1551 if (strlen) {
1552 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1553 return nfserr_resource;
1554 WRITE32(strlen);
1555 WRITEMEM(str, strlen);
1556 count++;
1557 }
1558 else
1559 end++;
1560 str = end;
1561 }
1562 *pp = p;
1563 p = countp;
1564 WRITE32(count);
1565 return 0;
1566 }
1567
1568 /*
1569 * encode a location element of a fs_locations structure
1570 */
1571 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1572 __be32 **pp, int *buflen)
1573 {
1574 __be32 status;
1575 __be32 *p = *pp;
1576
1577 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1578 if (status)
1579 return status;
1580 status = nfsd4_encode_components('/', location->path, &p, buflen);
1581 if (status)
1582 return status;
1583 *pp = p;
1584 return 0;
1585 }
1586
1587 /*
1588 * Return the path to an export point in the pseudo filesystem namespace
1589 * Returned string is safe to use as long as the caller holds a reference
1590 * to @exp.
1591 */
1592 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1593 {
1594 struct svc_fh tmp_fh;
1595 char *path = NULL, *rootpath;
1596 size_t rootlen;
1597
1598 fh_init(&tmp_fh, NFS4_FHSIZE);
1599 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1600 if (*stat)
1601 return NULL;
1602 rootpath = tmp_fh.fh_export->ex_pathname;
1603
1604 path = exp->ex_pathname;
1605
1606 rootlen = strlen(rootpath);
1607 if (strncmp(path, rootpath, rootlen)) {
1608 dprintk("nfsd: fs_locations failed;"
1609 "%s is not contained in %s\n", path, rootpath);
1610 *stat = nfserr_notsupp;
1611 path = NULL;
1612 goto out;
1613 }
1614 path += rootlen;
1615 out:
1616 fh_put(&tmp_fh);
1617 return path;
1618 }
1619
1620 /*
1621 * encode a fs_locations structure
1622 */
1623 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1624 struct svc_export *exp,
1625 __be32 **pp, int *buflen)
1626 {
1627 __be32 status;
1628 int i;
1629 __be32 *p = *pp;
1630 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1631 char *root = nfsd4_path(rqstp, exp, &status);
1632
1633 if (status)
1634 return status;
1635 status = nfsd4_encode_components('/', root, &p, buflen);
1636 if (status)
1637 return status;
1638 if ((*buflen -= 4) < 0)
1639 return nfserr_resource;
1640 WRITE32(fslocs->locations_count);
1641 for (i=0; i<fslocs->locations_count; i++) {
1642 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1643 &p, buflen);
1644 if (status)
1645 return status;
1646 }
1647 *pp = p;
1648 return 0;
1649 }
1650
1651 static u32 nfs4_ftypes[16] = {
1652 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1653 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1654 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1655 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1656 };
1657
1658 static __be32
1659 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1660 __be32 **p, int *buflen)
1661 {
1662 int status;
1663
1664 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1665 return nfserr_resource;
1666 if (whotype != NFS4_ACL_WHO_NAMED)
1667 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1668 else if (group)
1669 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1670 else
1671 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1672 if (status < 0)
1673 return nfserrno(status);
1674 *p = xdr_encode_opaque(*p, NULL, status);
1675 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1676 BUG_ON(*buflen < 0);
1677 return 0;
1678 }
1679
1680 static inline __be32
1681 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1682 {
1683 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1684 }
1685
1686 static inline __be32
1687 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1688 {
1689 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1690 }
1691
1692 static inline __be32
1693 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1694 __be32 **p, int *buflen)
1695 {
1696 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1697 }
1698
1699 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1700 FATTR4_WORD0_RDATTR_ERROR)
1701 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1702
1703 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1704 {
1705 /* As per referral draft: */
1706 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1707 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1708 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1709 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1710 *rdattr_err = NFSERR_MOVED;
1711 else
1712 return nfserr_moved;
1713 }
1714 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1715 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1716 return 0;
1717 }
1718
1719 /*
1720 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1721 * ourselves.
1722 *
1723 * @countp is the buffer size in _words_; upon successful return this becomes
1724 * replaced with the number of words written.
1725 */
1726 __be32
1727 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1728 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1729 struct svc_rqst *rqstp, int ignore_crossmnt)
1730 {
1731 u32 bmval0 = bmval[0];
1732 u32 bmval1 = bmval[1];
1733 u32 bmval2 = bmval[2];
1734 struct kstat stat;
1735 struct svc_fh tempfh;
1736 struct kstatfs statfs;
1737 int buflen = *countp << 2;
1738 __be32 *attrlenp;
1739 u32 dummy;
1740 u64 dummy64;
1741 u32 rdattr_err = 0;
1742 __be32 *p = buffer;
1743 __be32 status;
1744 int err;
1745 int aclsupport = 0;
1746 struct nfs4_acl *acl = NULL;
1747 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1748 u32 minorversion = resp->cstate.minorversion;
1749
1750 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1751 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1752 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1753 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1754
1755 if (exp->ex_fslocs.migrated) {
1756 BUG_ON(bmval[2]);
1757 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1758 if (status)
1759 goto out;
1760 }
1761
1762 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1763 if (err)
1764 goto out_nfserr;
1765 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1766 FATTR4_WORD0_MAXNAME)) ||
1767 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1768 FATTR4_WORD1_SPACE_TOTAL))) {
1769 err = vfs_statfs(dentry, &statfs);
1770 if (err)
1771 goto out_nfserr;
1772 }
1773 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1774 fh_init(&tempfh, NFS4_FHSIZE);
1775 status = fh_compose(&tempfh, exp, dentry, NULL);
1776 if (status)
1777 goto out;
1778 fhp = &tempfh;
1779 }
1780 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1781 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1782 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1783 aclsupport = (err == 0);
1784 if (bmval0 & FATTR4_WORD0_ACL) {
1785 if (err == -EOPNOTSUPP)
1786 bmval0 &= ~FATTR4_WORD0_ACL;
1787 else if (err == -EINVAL) {
1788 status = nfserr_attrnotsupp;
1789 goto out;
1790 } else if (err != 0)
1791 goto out_nfserr;
1792 }
1793 }
1794 if ((buflen -= 16) < 0)
1795 goto out_resource;
1796
1797 if (unlikely(bmval2)) {
1798 WRITE32(3);
1799 WRITE32(bmval0);
1800 WRITE32(bmval1);
1801 WRITE32(bmval2);
1802 } else if (likely(bmval1)) {
1803 WRITE32(2);
1804 WRITE32(bmval0);
1805 WRITE32(bmval1);
1806 } else {
1807 WRITE32(1);
1808 WRITE32(bmval0);
1809 }
1810 attrlenp = p++; /* to be backfilled later */
1811
1812 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1813 u32 word0 = nfsd_suppattrs0(minorversion);
1814 u32 word1 = nfsd_suppattrs1(minorversion);
1815 u32 word2 = nfsd_suppattrs2(minorversion);
1816
1817 if ((buflen -= 12) < 0)
1818 goto out_resource;
1819 if (!aclsupport)
1820 word0 &= ~FATTR4_WORD0_ACL;
1821 if (!word2) {
1822 WRITE32(2);
1823 WRITE32(word0);
1824 WRITE32(word1);
1825 } else {
1826 WRITE32(3);
1827 WRITE32(word0);
1828 WRITE32(word1);
1829 WRITE32(word2);
1830 }
1831 }
1832 if (bmval0 & FATTR4_WORD0_TYPE) {
1833 if ((buflen -= 4) < 0)
1834 goto out_resource;
1835 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1836 if (dummy == NF4BAD)
1837 goto out_serverfault;
1838 WRITE32(dummy);
1839 }
1840 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1841 if ((buflen -= 4) < 0)
1842 goto out_resource;
1843 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1844 WRITE32(NFS4_FH_PERSISTENT);
1845 else
1846 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1847 }
1848 if (bmval0 & FATTR4_WORD0_CHANGE) {
1849 if ((buflen -= 8) < 0)
1850 goto out_resource;
1851 write_change(&p, &stat, dentry->d_inode);
1852 }
1853 if (bmval0 & FATTR4_WORD0_SIZE) {
1854 if ((buflen -= 8) < 0)
1855 goto out_resource;
1856 WRITE64(stat.size);
1857 }
1858 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1859 if ((buflen -= 4) < 0)
1860 goto out_resource;
1861 WRITE32(1);
1862 }
1863 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1864 if ((buflen -= 4) < 0)
1865 goto out_resource;
1866 WRITE32(1);
1867 }
1868 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1869 if ((buflen -= 4) < 0)
1870 goto out_resource;
1871 WRITE32(0);
1872 }
1873 if (bmval0 & FATTR4_WORD0_FSID) {
1874 if ((buflen -= 16) < 0)
1875 goto out_resource;
1876 if (exp->ex_fslocs.migrated) {
1877 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1878 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1879 } else switch(fsid_source(fhp)) {
1880 case FSIDSOURCE_FSID:
1881 WRITE64((u64)exp->ex_fsid);
1882 WRITE64((u64)0);
1883 break;
1884 case FSIDSOURCE_DEV:
1885 WRITE32(0);
1886 WRITE32(MAJOR(stat.dev));
1887 WRITE32(0);
1888 WRITE32(MINOR(stat.dev));
1889 break;
1890 case FSIDSOURCE_UUID:
1891 WRITEMEM(exp->ex_uuid, 16);
1892 break;
1893 }
1894 }
1895 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1896 if ((buflen -= 4) < 0)
1897 goto out_resource;
1898 WRITE32(0);
1899 }
1900 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1901 if ((buflen -= 4) < 0)
1902 goto out_resource;
1903 WRITE32(NFSD_LEASE_TIME);
1904 }
1905 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1906 if ((buflen -= 4) < 0)
1907 goto out_resource;
1908 WRITE32(rdattr_err);
1909 }
1910 if (bmval0 & FATTR4_WORD0_ACL) {
1911 struct nfs4_ace *ace;
1912
1913 if (acl == NULL) {
1914 if ((buflen -= 4) < 0)
1915 goto out_resource;
1916
1917 WRITE32(0);
1918 goto out_acl;
1919 }
1920 if ((buflen -= 4) < 0)
1921 goto out_resource;
1922 WRITE32(acl->naces);
1923
1924 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1925 if ((buflen -= 4*3) < 0)
1926 goto out_resource;
1927 WRITE32(ace->type);
1928 WRITE32(ace->flag);
1929 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1930 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1931 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1932 &p, &buflen);
1933 if (status == nfserr_resource)
1934 goto out_resource;
1935 if (status)
1936 goto out;
1937 }
1938 }
1939 out_acl:
1940 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1941 if ((buflen -= 4) < 0)
1942 goto out_resource;
1943 WRITE32(aclsupport ?
1944 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1945 }
1946 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1947 if ((buflen -= 4) < 0)
1948 goto out_resource;
1949 WRITE32(1);
1950 }
1951 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1952 if ((buflen -= 4) < 0)
1953 goto out_resource;
1954 WRITE32(1);
1955 }
1956 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1957 if ((buflen -= 4) < 0)
1958 goto out_resource;
1959 WRITE32(1);
1960 }
1961 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1962 if ((buflen -= 4) < 0)
1963 goto out_resource;
1964 WRITE32(1);
1965 }
1966 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1967 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1968 if (buflen < 0)
1969 goto out_resource;
1970 WRITE32(fhp->fh_handle.fh_size);
1971 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1972 }
1973 if (bmval0 & FATTR4_WORD0_FILEID) {
1974 if ((buflen -= 8) < 0)
1975 goto out_resource;
1976 WRITE64(stat.ino);
1977 }
1978 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1979 if ((buflen -= 8) < 0)
1980 goto out_resource;
1981 WRITE64((u64) statfs.f_ffree);
1982 }
1983 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1984 if ((buflen -= 8) < 0)
1985 goto out_resource;
1986 WRITE64((u64) statfs.f_ffree);
1987 }
1988 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1989 if ((buflen -= 8) < 0)
1990 goto out_resource;
1991 WRITE64((u64) statfs.f_files);
1992 }
1993 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1994 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1995 if (status == nfserr_resource)
1996 goto out_resource;
1997 if (status)
1998 goto out;
1999 }
2000 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2001 if ((buflen -= 4) < 0)
2002 goto out_resource;
2003 WRITE32(1);
2004 }
2005 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2006 if ((buflen -= 8) < 0)
2007 goto out_resource;
2008 WRITE64(~(u64)0);
2009 }
2010 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2011 if ((buflen -= 4) < 0)
2012 goto out_resource;
2013 WRITE32(255);
2014 }
2015 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2016 if ((buflen -= 4) < 0)
2017 goto out_resource;
2018 WRITE32(statfs.f_namelen);
2019 }
2020 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2021 if ((buflen -= 8) < 0)
2022 goto out_resource;
2023 WRITE64((u64) svc_max_payload(rqstp));
2024 }
2025 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2026 if ((buflen -= 8) < 0)
2027 goto out_resource;
2028 WRITE64((u64) svc_max_payload(rqstp));
2029 }
2030 if (bmval1 & FATTR4_WORD1_MODE) {
2031 if ((buflen -= 4) < 0)
2032 goto out_resource;
2033 WRITE32(stat.mode & S_IALLUGO);
2034 }
2035 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2036 if ((buflen -= 4) < 0)
2037 goto out_resource;
2038 WRITE32(1);
2039 }
2040 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2041 if ((buflen -= 4) < 0)
2042 goto out_resource;
2043 WRITE32(stat.nlink);
2044 }
2045 if (bmval1 & FATTR4_WORD1_OWNER) {
2046 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2047 if (status == nfserr_resource)
2048 goto out_resource;
2049 if (status)
2050 goto out;
2051 }
2052 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2053 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2054 if (status == nfserr_resource)
2055 goto out_resource;
2056 if (status)
2057 goto out;
2058 }
2059 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2060 if ((buflen -= 8) < 0)
2061 goto out_resource;
2062 WRITE32((u32) MAJOR(stat.rdev));
2063 WRITE32((u32) MINOR(stat.rdev));
2064 }
2065 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2066 if ((buflen -= 8) < 0)
2067 goto out_resource;
2068 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2069 WRITE64(dummy64);
2070 }
2071 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2072 if ((buflen -= 8) < 0)
2073 goto out_resource;
2074 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2075 WRITE64(dummy64);
2076 }
2077 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2078 if ((buflen -= 8) < 0)
2079 goto out_resource;
2080 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2081 WRITE64(dummy64);
2082 }
2083 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2084 if ((buflen -= 8) < 0)
2085 goto out_resource;
2086 dummy64 = (u64)stat.blocks << 9;
2087 WRITE64(dummy64);
2088 }
2089 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2090 if ((buflen -= 12) < 0)
2091 goto out_resource;
2092 WRITE32(0);
2093 WRITE32(stat.atime.tv_sec);
2094 WRITE32(stat.atime.tv_nsec);
2095 }
2096 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2097 if ((buflen -= 12) < 0)
2098 goto out_resource;
2099 WRITE32(0);
2100 WRITE32(1);
2101 WRITE32(0);
2102 }
2103 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2104 if ((buflen -= 12) < 0)
2105 goto out_resource;
2106 WRITE32(0);
2107 WRITE32(stat.ctime.tv_sec);
2108 WRITE32(stat.ctime.tv_nsec);
2109 }
2110 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2111 if ((buflen -= 12) < 0)
2112 goto out_resource;
2113 WRITE32(0);
2114 WRITE32(stat.mtime.tv_sec);
2115 WRITE32(stat.mtime.tv_nsec);
2116 }
2117 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2118 if ((buflen -= 8) < 0)
2119 goto out_resource;
2120 /*
2121 * Get parent's attributes if not ignoring crossmount
2122 * and this is the root of a cross-mounted filesystem.
2123 */
2124 if (ignore_crossmnt == 0 &&
2125 dentry == exp->ex_path.mnt->mnt_root) {
2126 struct path path = exp->ex_path;
2127 path_get(&path);
2128 while (follow_up(&path)) {
2129 if (path.dentry != path.mnt->mnt_root)
2130 break;
2131 }
2132 err = vfs_getattr(path.mnt, path.dentry, &stat);
2133 path_put(&path);
2134 if (err)
2135 goto out_nfserr;
2136 }
2137 WRITE64(stat.ino);
2138 }
2139 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2140 WRITE32(3);
2141 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2142 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2143 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2144 }
2145
2146 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2147 *countp = p - buffer;
2148 status = nfs_ok;
2149
2150 out:
2151 kfree(acl);
2152 if (fhp == &tempfh)
2153 fh_put(&tempfh);
2154 return status;
2155 out_nfserr:
2156 status = nfserrno(err);
2157 goto out;
2158 out_resource:
2159 *countp = 0;
2160 status = nfserr_resource;
2161 goto out;
2162 out_serverfault:
2163 status = nfserr_serverfault;
2164 goto out;
2165 }
2166
2167 static inline int attributes_need_mount(u32 *bmval)
2168 {
2169 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2170 return 1;
2171 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2172 return 1;
2173 return 0;
2174 }
2175
2176 static __be32
2177 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2178 const char *name, int namlen, __be32 *p, int *buflen)
2179 {
2180 struct svc_export *exp = cd->rd_fhp->fh_export;
2181 struct dentry *dentry;
2182 __be32 nfserr;
2183 int ignore_crossmnt = 0;
2184
2185 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2186 if (IS_ERR(dentry))
2187 return nfserrno(PTR_ERR(dentry));
2188 if (!dentry->d_inode) {
2189 /*
2190 * nfsd_buffered_readdir drops the i_mutex between
2191 * readdir and calling this callback, leaving a window
2192 * where this directory entry could have gone away.
2193 */
2194 dput(dentry);
2195 return nfserr_noent;
2196 }
2197
2198 exp_get(exp);
2199 /*
2200 * In the case of a mountpoint, the client may be asking for
2201 * attributes that are only properties of the underlying filesystem
2202 * as opposed to the cross-mounted file system. In such a case,
2203 * we will not follow the cross mount and will fill the attribtutes
2204 * directly from the mountpoint dentry.
2205 */
2206 if (nfsd_mountpoint(dentry, exp)) {
2207 int err;
2208
2209 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2210 && !attributes_need_mount(cd->rd_bmval)) {
2211 ignore_crossmnt = 1;
2212 goto out_encode;
2213 }
2214 /*
2215 * Why the heck aren't we just using nfsd_lookup??
2216 * Different "."/".." handling? Something else?
2217 * At least, add a comment here to explain....
2218 */
2219 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2220 if (err) {
2221 nfserr = nfserrno(err);
2222 goto out_put;
2223 }
2224 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2225 if (nfserr)
2226 goto out_put;
2227
2228 }
2229 out_encode:
2230 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2231 cd->rd_rqstp, ignore_crossmnt);
2232 out_put:
2233 dput(dentry);
2234 exp_put(exp);
2235 return nfserr;
2236 }
2237
2238 static __be32 *
2239 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2240 {
2241 __be32 *attrlenp;
2242
2243 if (buflen < 6)
2244 return NULL;
2245 *p++ = htonl(2);
2246 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2247 *p++ = htonl(0); /* bmval1 */
2248
2249 attrlenp = p++;
2250 *p++ = nfserr; /* no htonl */
2251 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2252 return p;
2253 }
2254
2255 static int
2256 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2257 loff_t offset, u64 ino, unsigned int d_type)
2258 {
2259 struct readdir_cd *ccd = ccdv;
2260 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2261 int buflen;
2262 __be32 *p = cd->buffer;
2263 __be32 *cookiep;
2264 __be32 nfserr = nfserr_toosmall;
2265
2266 /* In nfsv4, "." and ".." never make it onto the wire.. */
2267 if (name && isdotent(name, namlen)) {
2268 cd->common.err = nfs_ok;
2269 return 0;
2270 }
2271
2272 if (cd->offset)
2273 xdr_encode_hyper(cd->offset, (u64) offset);
2274
2275 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2276 if (buflen < 0)
2277 goto fail;
2278
2279 *p++ = xdr_one; /* mark entry present */
2280 cookiep = p;
2281 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2282 p = xdr_encode_array(p, name, namlen); /* name length & name */
2283
2284 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2285 switch (nfserr) {
2286 case nfs_ok:
2287 p += buflen;
2288 break;
2289 case nfserr_resource:
2290 nfserr = nfserr_toosmall;
2291 goto fail;
2292 case nfserr_dropit:
2293 goto fail;
2294 case nfserr_noent:
2295 goto skip_entry;
2296 default:
2297 /*
2298 * If the client requested the RDATTR_ERROR attribute,
2299 * we stuff the error code into this attribute
2300 * and continue. If this attribute was not requested,
2301 * then in accordance with the spec, we fail the
2302 * entire READDIR operation(!)
2303 */
2304 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2305 goto fail;
2306 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2307 if (p == NULL) {
2308 nfserr = nfserr_toosmall;
2309 goto fail;
2310 }
2311 }
2312 cd->buflen -= (p - cd->buffer);
2313 cd->buffer = p;
2314 cd->offset = cookiep;
2315 skip_entry:
2316 cd->common.err = nfs_ok;
2317 return 0;
2318 fail:
2319 cd->common.err = nfserr;
2320 return -EINVAL;
2321 }
2322
2323 static void
2324 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2325 {
2326 __be32 *p;
2327
2328 RESERVE_SPACE(sizeof(stateid_t));
2329 WRITE32(sid->si_generation);
2330 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2331 ADJUST_ARGS();
2332 }
2333
2334 static __be32
2335 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2336 {
2337 __be32 *p;
2338
2339 if (!nfserr) {
2340 RESERVE_SPACE(8);
2341 WRITE32(access->ac_supported);
2342 WRITE32(access->ac_resp_access);
2343 ADJUST_ARGS();
2344 }
2345 return nfserr;
2346 }
2347
2348 static __be32
2349 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2350 {
2351 ENCODE_SEQID_OP_HEAD;
2352
2353 if (!nfserr)
2354 nfsd4_encode_stateid(resp, &close->cl_stateid);
2355
2356 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2357 return nfserr;
2358 }
2359
2360
2361 static __be32
2362 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2363 {
2364 __be32 *p;
2365
2366 if (!nfserr) {
2367 RESERVE_SPACE(8);
2368 WRITEMEM(commit->co_verf.data, 8);
2369 ADJUST_ARGS();
2370 }
2371 return nfserr;
2372 }
2373
2374 static __be32
2375 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2376 {
2377 __be32 *p;
2378
2379 if (!nfserr) {
2380 RESERVE_SPACE(32);
2381 write_cinfo(&p, &create->cr_cinfo);
2382 WRITE32(2);
2383 WRITE32(create->cr_bmval[0]);
2384 WRITE32(create->cr_bmval[1]);
2385 ADJUST_ARGS();
2386 }
2387 return nfserr;
2388 }
2389
2390 static __be32
2391 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2392 {
2393 struct svc_fh *fhp = getattr->ga_fhp;
2394 int buflen;
2395
2396 if (nfserr)
2397 return nfserr;
2398
2399 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2400 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2401 resp->p, &buflen, getattr->ga_bmval,
2402 resp->rqstp, 0);
2403 if (!nfserr)
2404 resp->p += buflen;
2405 return nfserr;
2406 }
2407
2408 static __be32
2409 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2410 {
2411 struct svc_fh *fhp = *fhpp;
2412 unsigned int len;
2413 __be32 *p;
2414
2415 if (!nfserr) {
2416 len = fhp->fh_handle.fh_size;
2417 RESERVE_SPACE(len + 4);
2418 WRITE32(len);
2419 WRITEMEM(&fhp->fh_handle.fh_base, len);
2420 ADJUST_ARGS();
2421 }
2422 return nfserr;
2423 }
2424
2425 /*
2426 * Including all fields other than the name, a LOCK4denied structure requires
2427 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2428 */
2429 static void
2430 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2431 {
2432 __be32 *p;
2433
2434 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2435 WRITE64(ld->ld_start);
2436 WRITE64(ld->ld_length);
2437 WRITE32(ld->ld_type);
2438 if (ld->ld_sop) {
2439 WRITEMEM(&ld->ld_clientid, 8);
2440 WRITE32(ld->ld_sop->so_owner.len);
2441 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2442 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2443 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2444 WRITE64((u64)0); /* clientid */
2445 WRITE32(0); /* length of owner name */
2446 }
2447 ADJUST_ARGS();
2448 }
2449
2450 static __be32
2451 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2452 {
2453 ENCODE_SEQID_OP_HEAD;
2454
2455 if (!nfserr)
2456 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2457 else if (nfserr == nfserr_denied)
2458 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2459
2460 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2461 return nfserr;
2462 }
2463
2464 static __be32
2465 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2466 {
2467 if (nfserr == nfserr_denied)
2468 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2469 return nfserr;
2470 }
2471
2472 static __be32
2473 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2474 {
2475 ENCODE_SEQID_OP_HEAD;
2476
2477 if (!nfserr)
2478 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2479
2480 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2481 return nfserr;
2482 }
2483
2484
2485 static __be32
2486 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2487 {
2488 __be32 *p;
2489
2490 if (!nfserr) {
2491 RESERVE_SPACE(20);
2492 write_cinfo(&p, &link->li_cinfo);
2493 ADJUST_ARGS();
2494 }
2495 return nfserr;
2496 }
2497
2498
2499 static __be32
2500 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2501 {
2502 __be32 *p;
2503 ENCODE_SEQID_OP_HEAD;
2504
2505 if (nfserr)
2506 goto out;
2507
2508 nfsd4_encode_stateid(resp, &open->op_stateid);
2509 RESERVE_SPACE(40);
2510 write_cinfo(&p, &open->op_cinfo);
2511 WRITE32(open->op_rflags);
2512 WRITE32(2);
2513 WRITE32(open->op_bmval[0]);
2514 WRITE32(open->op_bmval[1]);
2515 WRITE32(open->op_delegate_type);
2516 ADJUST_ARGS();
2517
2518 switch (open->op_delegate_type) {
2519 case NFS4_OPEN_DELEGATE_NONE:
2520 break;
2521 case NFS4_OPEN_DELEGATE_READ:
2522 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2523 RESERVE_SPACE(20);
2524 WRITE32(open->op_recall);
2525
2526 /*
2527 * TODO: ACE's in delegations
2528 */
2529 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2530 WRITE32(0);
2531 WRITE32(0);
2532 WRITE32(0); /* XXX: is NULL principal ok? */
2533 ADJUST_ARGS();
2534 break;
2535 case NFS4_OPEN_DELEGATE_WRITE:
2536 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2537 RESERVE_SPACE(32);
2538 WRITE32(0);
2539
2540 /*
2541 * TODO: space_limit's in delegations
2542 */
2543 WRITE32(NFS4_LIMIT_SIZE);
2544 WRITE32(~(u32)0);
2545 WRITE32(~(u32)0);
2546
2547 /*
2548 * TODO: ACE's in delegations
2549 */
2550 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2551 WRITE32(0);
2552 WRITE32(0);
2553 WRITE32(0); /* XXX: is NULL principal ok? */
2554 ADJUST_ARGS();
2555 break;
2556 default:
2557 BUG();
2558 }
2559 /* XXX save filehandle here */
2560 out:
2561 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2562 return nfserr;
2563 }
2564
2565 static __be32
2566 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2567 {
2568 ENCODE_SEQID_OP_HEAD;
2569
2570 if (!nfserr)
2571 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2572
2573 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2574 return nfserr;
2575 }
2576
2577 static __be32
2578 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2579 {
2580 ENCODE_SEQID_OP_HEAD;
2581
2582 if (!nfserr)
2583 nfsd4_encode_stateid(resp, &od->od_stateid);
2584
2585 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2586 return nfserr;
2587 }
2588
2589 static __be32
2590 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2591 struct nfsd4_read *read)
2592 {
2593 u32 eof;
2594 int v, pn;
2595 unsigned long maxcount;
2596 long len;
2597 __be32 *p;
2598
2599 if (nfserr)
2600 return nfserr;
2601 if (resp->xbuf->page_len)
2602 return nfserr_resource;
2603
2604 RESERVE_SPACE(8); /* eof flag and byte count */
2605
2606 maxcount = svc_max_payload(resp->rqstp);
2607 if (maxcount > read->rd_length)
2608 maxcount = read->rd_length;
2609
2610 len = maxcount;
2611 v = 0;
2612 while (len > 0) {
2613 pn = resp->rqstp->rq_resused++;
2614 resp->rqstp->rq_vec[v].iov_base =
2615 page_address(resp->rqstp->rq_respages[pn]);
2616 resp->rqstp->rq_vec[v].iov_len =
2617 len < PAGE_SIZE ? len : PAGE_SIZE;
2618 v++;
2619 len -= PAGE_SIZE;
2620 }
2621 read->rd_vlen = v;
2622
2623 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2624 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2625 &maxcount);
2626
2627 if (nfserr == nfserr_symlink)
2628 nfserr = nfserr_inval;
2629 if (nfserr)
2630 return nfserr;
2631 eof = (read->rd_offset + maxcount >=
2632 read->rd_fhp->fh_dentry->d_inode->i_size);
2633
2634 WRITE32(eof);
2635 WRITE32(maxcount);
2636 ADJUST_ARGS();
2637 resp->xbuf->head[0].iov_len = (char*)p
2638 - (char*)resp->xbuf->head[0].iov_base;
2639 resp->xbuf->page_len = maxcount;
2640
2641 /* Use rest of head for padding and remaining ops: */
2642 resp->xbuf->tail[0].iov_base = p;
2643 resp->xbuf->tail[0].iov_len = 0;
2644 if (maxcount&3) {
2645 RESERVE_SPACE(4);
2646 WRITE32(0);
2647 resp->xbuf->tail[0].iov_base += maxcount&3;
2648 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2649 ADJUST_ARGS();
2650 }
2651 return 0;
2652 }
2653
2654 static __be32
2655 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2656 {
2657 int maxcount;
2658 char *page;
2659 __be32 *p;
2660
2661 if (nfserr)
2662 return nfserr;
2663 if (resp->xbuf->page_len)
2664 return nfserr_resource;
2665
2666 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2667
2668 maxcount = PAGE_SIZE;
2669 RESERVE_SPACE(4);
2670
2671 /*
2672 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2673 * if they would overflow the buffer. Is this kosher in NFSv4? If
2674 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2675 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2676 */
2677 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2678 if (nfserr == nfserr_isdir)
2679 return nfserr_inval;
2680 if (nfserr)
2681 return nfserr;
2682
2683 WRITE32(maxcount);
2684 ADJUST_ARGS();
2685 resp->xbuf->head[0].iov_len = (char*)p
2686 - (char*)resp->xbuf->head[0].iov_base;
2687 resp->xbuf->page_len = maxcount;
2688
2689 /* Use rest of head for padding and remaining ops: */
2690 resp->xbuf->tail[0].iov_base = p;
2691 resp->xbuf->tail[0].iov_len = 0;
2692 if (maxcount&3) {
2693 RESERVE_SPACE(4);
2694 WRITE32(0);
2695 resp->xbuf->tail[0].iov_base += maxcount&3;
2696 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2697 ADJUST_ARGS();
2698 }
2699 return 0;
2700 }
2701
2702 static __be32
2703 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2704 {
2705 int maxcount;
2706 loff_t offset;
2707 __be32 *page, *savep, *tailbase;
2708 __be32 *p;
2709
2710 if (nfserr)
2711 return nfserr;
2712 if (resp->xbuf->page_len)
2713 return nfserr_resource;
2714
2715 RESERVE_SPACE(8); /* verifier */
2716 savep = p;
2717
2718 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2719 WRITE32(0);
2720 WRITE32(0);
2721 ADJUST_ARGS();
2722 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2723 tailbase = p;
2724
2725 maxcount = PAGE_SIZE;
2726 if (maxcount > readdir->rd_maxcount)
2727 maxcount = readdir->rd_maxcount;
2728
2729 /*
2730 * Convert from bytes to words, account for the two words already
2731 * written, make sure to leave two words at the end for the next
2732 * pointer and eof field.
2733 */
2734 maxcount = (maxcount >> 2) - 4;
2735 if (maxcount < 0) {
2736 nfserr = nfserr_toosmall;
2737 goto err_no_verf;
2738 }
2739
2740 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2741 readdir->common.err = 0;
2742 readdir->buflen = maxcount;
2743 readdir->buffer = page;
2744 readdir->offset = NULL;
2745
2746 offset = readdir->rd_cookie;
2747 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2748 &offset,
2749 &readdir->common, nfsd4_encode_dirent);
2750 if (nfserr == nfs_ok &&
2751 readdir->common.err == nfserr_toosmall &&
2752 readdir->buffer == page)
2753 nfserr = nfserr_toosmall;
2754 if (nfserr == nfserr_symlink)
2755 nfserr = nfserr_notdir;
2756 if (nfserr)
2757 goto err_no_verf;
2758
2759 if (readdir->offset)
2760 xdr_encode_hyper(readdir->offset, offset);
2761
2762 p = readdir->buffer;
2763 *p++ = 0; /* no more entries */
2764 *p++ = htonl(readdir->common.err == nfserr_eof);
2765 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2766 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2767
2768 /* Use rest of head for padding and remaining ops: */
2769 resp->xbuf->tail[0].iov_base = tailbase;
2770 resp->xbuf->tail[0].iov_len = 0;
2771 resp->p = resp->xbuf->tail[0].iov_base;
2772 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2773
2774 return 0;
2775 err_no_verf:
2776 p = savep;
2777 ADJUST_ARGS();
2778 return nfserr;
2779 }
2780
2781 static __be32
2782 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2783 {
2784 __be32 *p;
2785
2786 if (!nfserr) {
2787 RESERVE_SPACE(20);
2788 write_cinfo(&p, &remove->rm_cinfo);
2789 ADJUST_ARGS();
2790 }
2791 return nfserr;
2792 }
2793
2794 static __be32
2795 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2796 {
2797 __be32 *p;
2798
2799 if (!nfserr) {
2800 RESERVE_SPACE(40);
2801 write_cinfo(&p, &rename->rn_sinfo);
2802 write_cinfo(&p, &rename->rn_tinfo);
2803 ADJUST_ARGS();
2804 }
2805 return nfserr;
2806 }
2807
2808 static __be32
2809 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2810 struct nfsd4_secinfo *secinfo)
2811 {
2812 int i = 0;
2813 struct svc_export *exp = secinfo->si_exp;
2814 u32 nflavs;
2815 struct exp_flavor_info *flavs;
2816 struct exp_flavor_info def_flavs[2];
2817 __be32 *p;
2818
2819 if (nfserr)
2820 goto out;
2821 if (exp->ex_nflavors) {
2822 flavs = exp->ex_flavors;
2823 nflavs = exp->ex_nflavors;
2824 } else { /* Handling of some defaults in absence of real secinfo: */
2825 flavs = def_flavs;
2826 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2827 nflavs = 2;
2828 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2829 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2830 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2831 nflavs = 1;
2832 flavs[0].pseudoflavor
2833 = svcauth_gss_flavor(exp->ex_client);
2834 } else {
2835 nflavs = 1;
2836 flavs[0].pseudoflavor
2837 = exp->ex_client->flavour->flavour;
2838 }
2839 }
2840
2841 RESERVE_SPACE(4);
2842 WRITE32(nflavs);
2843 ADJUST_ARGS();
2844 for (i = 0; i < nflavs; i++) {
2845 u32 flav = flavs[i].pseudoflavor;
2846 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2847
2848 if (gm) {
2849 RESERVE_SPACE(4);
2850 WRITE32(RPC_AUTH_GSS);
2851 ADJUST_ARGS();
2852 RESERVE_SPACE(4 + gm->gm_oid.len);
2853 WRITE32(gm->gm_oid.len);
2854 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2855 ADJUST_ARGS();
2856 RESERVE_SPACE(4);
2857 WRITE32(0); /* qop */
2858 ADJUST_ARGS();
2859 RESERVE_SPACE(4);
2860 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2861 ADJUST_ARGS();
2862 gss_mech_put(gm);
2863 } else {
2864 RESERVE_SPACE(4);
2865 WRITE32(flav);
2866 ADJUST_ARGS();
2867 }
2868 }
2869 out:
2870 if (exp)
2871 exp_put(exp);
2872 return nfserr;
2873 }
2874
2875 /*
2876 * The SETATTR encode routine is special -- it always encodes a bitmap,
2877 * regardless of the error status.
2878 */
2879 static __be32
2880 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2881 {
2882 __be32 *p;
2883
2884 RESERVE_SPACE(12);
2885 if (nfserr) {
2886 WRITE32(2);
2887 WRITE32(0);
2888 WRITE32(0);
2889 }
2890 else {
2891 WRITE32(2);
2892 WRITE32(setattr->sa_bmval[0]);
2893 WRITE32(setattr->sa_bmval[1]);
2894 }
2895 ADJUST_ARGS();
2896 return nfserr;
2897 }
2898
2899 static __be32
2900 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2901 {
2902 __be32 *p;
2903
2904 if (!nfserr) {
2905 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2906 WRITEMEM(&scd->se_clientid, 8);
2907 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2908 ADJUST_ARGS();
2909 }
2910 else if (nfserr == nfserr_clid_inuse) {
2911 RESERVE_SPACE(8);
2912 WRITE32(0);
2913 WRITE32(0);
2914 ADJUST_ARGS();
2915 }
2916 return nfserr;
2917 }
2918
2919 static __be32
2920 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2921 {
2922 __be32 *p;
2923
2924 if (!nfserr) {
2925 RESERVE_SPACE(16);
2926 WRITE32(write->wr_bytes_written);
2927 WRITE32(write->wr_how_written);
2928 WRITEMEM(write->wr_verifier.data, 8);
2929 ADJUST_ARGS();
2930 }
2931 return nfserr;
2932 }
2933
2934 static __be32
2935 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2936 struct nfsd4_exchange_id *exid)
2937 {
2938 __be32 *p;
2939 char *major_id;
2940 char *server_scope;
2941 int major_id_sz;
2942 int server_scope_sz;
2943 uint64_t minor_id = 0;
2944
2945 if (nfserr)
2946 return nfserr;
2947
2948 major_id = utsname()->nodename;
2949 major_id_sz = strlen(major_id);
2950 server_scope = utsname()->nodename;
2951 server_scope_sz = strlen(server_scope);
2952
2953 RESERVE_SPACE(
2954 8 /* eir_clientid */ +
2955 4 /* eir_sequenceid */ +
2956 4 /* eir_flags */ +
2957 4 /* spr_how (SP4_NONE) */ +
2958 8 /* so_minor_id */ +
2959 4 /* so_major_id.len */ +
2960 (XDR_QUADLEN(major_id_sz) * 4) +
2961 4 /* eir_server_scope.len */ +
2962 (XDR_QUADLEN(server_scope_sz) * 4) +
2963 4 /* eir_server_impl_id.count (0) */);
2964
2965 WRITEMEM(&exid->clientid, 8);
2966 WRITE32(exid->seqid);
2967 WRITE32(exid->flags);
2968
2969 /* state_protect4_r. Currently only support SP4_NONE */
2970 BUG_ON(exid->spa_how != SP4_NONE);
2971 WRITE32(exid->spa_how);
2972
2973 /* The server_owner struct */
2974 WRITE64(minor_id); /* Minor id */
2975 /* major id */
2976 WRITE32(major_id_sz);
2977 WRITEMEM(major_id, major_id_sz);
2978
2979 /* Server scope */
2980 WRITE32(server_scope_sz);
2981 WRITEMEM(server_scope, server_scope_sz);
2982
2983 /* Implementation id */
2984 WRITE32(0); /* zero length nfs_impl_id4 array */
2985 ADJUST_ARGS();
2986 return 0;
2987 }
2988
2989 static __be32
2990 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
2991 struct nfsd4_create_session *sess)
2992 {
2993 __be32 *p;
2994
2995 if (nfserr)
2996 return nfserr;
2997
2998 RESERVE_SPACE(24);
2999 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3000 WRITE32(sess->seqid);
3001 WRITE32(sess->flags);
3002 ADJUST_ARGS();
3003
3004 RESERVE_SPACE(28);
3005 WRITE32(0); /* headerpadsz */
3006 WRITE32(sess->fore_channel.maxreq_sz);
3007 WRITE32(sess->fore_channel.maxresp_sz);
3008 WRITE32(sess->fore_channel.maxresp_cached);
3009 WRITE32(sess->fore_channel.maxops);
3010 WRITE32(sess->fore_channel.maxreqs);
3011 WRITE32(sess->fore_channel.nr_rdma_attrs);
3012 ADJUST_ARGS();
3013
3014 if (sess->fore_channel.nr_rdma_attrs) {
3015 RESERVE_SPACE(4);
3016 WRITE32(sess->fore_channel.rdma_attrs);
3017 ADJUST_ARGS();
3018 }
3019
3020 RESERVE_SPACE(28);
3021 WRITE32(0); /* headerpadsz */
3022 WRITE32(sess->back_channel.maxreq_sz);
3023 WRITE32(sess->back_channel.maxresp_sz);
3024 WRITE32(sess->back_channel.maxresp_cached);
3025 WRITE32(sess->back_channel.maxops);
3026 WRITE32(sess->back_channel.maxreqs);
3027 WRITE32(sess->back_channel.nr_rdma_attrs);
3028 ADJUST_ARGS();
3029
3030 if (sess->back_channel.nr_rdma_attrs) {
3031 RESERVE_SPACE(4);
3032 WRITE32(sess->back_channel.rdma_attrs);
3033 ADJUST_ARGS();
3034 }
3035 return 0;
3036 }
3037
3038 static __be32
3039 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3040 struct nfsd4_destroy_session *destroy_session)
3041 {
3042 return nfserr;
3043 }
3044
3045 __be32
3046 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3047 struct nfsd4_sequence *seq)
3048 {
3049 __be32 *p;
3050
3051 if (nfserr)
3052 return nfserr;
3053
3054 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3055 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3056 WRITE32(seq->seqid);
3057 WRITE32(seq->slotid);
3058 WRITE32(seq->maxslots);
3059 /*
3060 * FIXME: for now:
3061 * target_maxslots = maxslots
3062 * status_flags = 0
3063 */
3064 WRITE32(seq->maxslots);
3065 WRITE32(0);
3066
3067 ADJUST_ARGS();
3068 resp->cstate.datap = p; /* DRC cache data pointer */
3069 return 0;
3070 }
3071
3072 static __be32
3073 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3074 {
3075 return nfserr;
3076 }
3077
3078 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3079
3080 /*
3081 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3082 * since we don't need to filter out obsolete ops as this is
3083 * done in the decoding phase.
3084 */
3085 static nfsd4_enc nfsd4_enc_ops[] = {
3086 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3087 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3088 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3089 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3090 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3091 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3092 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3093 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3094 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3095 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3096 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3097 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3098 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3099 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3100 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3101 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3102 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3103 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3104 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3105 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3106 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3107 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3108 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3109 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3110 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3111 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3112 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3113 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3114 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3115 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3116 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3117 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3118 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3119 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3120 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3121 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3122 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3123
3124 /* NFSv4.1 operations */
3125 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3126 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3127 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3128 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3129 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3130 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3131 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3132 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3133 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3134 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3135 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3136 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3137 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
3138 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3139 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3140 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3141 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3142 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3143 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3144 };
3145
3146 /*
3147 * Calculate the total amount of memory that the compound response has taken
3148 * after encoding the current operation.
3149 *
3150 * pad: add on 8 bytes for the next operation's op_code and status so that
3151 * there is room to cache a failure on the next operation.
3152 *
3153 * Compare this length to the session se_fmaxresp_cached.
3154 *
3155 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3156 * will be at least a page and will therefore hold the xdr_buf head.
3157 */
3158 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3159 {
3160 int status = 0;
3161 struct xdr_buf *xb = &resp->rqstp->rq_res;
3162 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3163 struct nfsd4_session *session = NULL;
3164 struct nfsd4_slot *slot = resp->cstate.slot;
3165 u32 length, tlen = 0, pad = 8;
3166
3167 if (!nfsd4_has_session(&resp->cstate))
3168 return status;
3169
3170 session = resp->cstate.session;
3171 if (session == NULL || slot->sl_cachethis == 0)
3172 return status;
3173
3174 if (resp->opcnt >= args->opcnt)
3175 pad = 0; /* this is the last operation */
3176
3177 if (xb->page_len == 0) {
3178 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3179 } else {
3180 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3181 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3182
3183 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3184 }
3185 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3186 length, xb->page_len, tlen, pad);
3187
3188 if (length <= session->se_fchannel.maxresp_cached)
3189 return status;
3190 else
3191 return nfserr_rep_too_big_to_cache;
3192 }
3193
3194 void
3195 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3196 {
3197 __be32 *statp;
3198 __be32 *p;
3199
3200 RESERVE_SPACE(8);
3201 WRITE32(op->opnum);
3202 statp = p++; /* to be backfilled at the end */
3203 ADJUST_ARGS();
3204
3205 if (op->opnum == OP_ILLEGAL)
3206 goto status;
3207 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3208 !nfsd4_enc_ops[op->opnum]);
3209 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3210 /* nfsd4_check_drc_limit guarantees enough room for error status */
3211 if (!op->status && nfsd4_check_drc_limit(resp))
3212 op->status = nfserr_rep_too_big_to_cache;
3213 status:
3214 /*
3215 * Note: We write the status directly, instead of using WRITE32(),
3216 * since it is already in network byte order.
3217 */
3218 *statp = op->status;
3219 }
3220
3221 /*
3222 * Encode the reply stored in the stateowner reply cache
3223 *
3224 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3225 * previously sent already encoded operation.
3226 *
3227 * called with nfs4_lock_state() held
3228 */
3229 void
3230 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3231 {
3232 __be32 *p;
3233 struct nfs4_replay *rp = op->replay;
3234
3235 BUG_ON(!rp);
3236
3237 RESERVE_SPACE(8);
3238 WRITE32(op->opnum);
3239 *p++ = rp->rp_status; /* already xdr'ed */
3240 ADJUST_ARGS();
3241
3242 RESERVE_SPACE(rp->rp_buflen);
3243 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3244 ADJUST_ARGS();
3245 }
3246
3247 int
3248 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3249 {
3250 return xdr_ressize_check(rqstp, p);
3251 }
3252
3253 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3254 {
3255 if (args->ops != args->iops) {
3256 kfree(args->ops);
3257 args->ops = args->iops;
3258 }
3259 kfree(args->tmpp);
3260 args->tmpp = NULL;
3261 while (args->to_free) {
3262 struct tmpbuf *tb = args->to_free;
3263 args->to_free = tb->next;
3264 tb->release(tb->buf);
3265 kfree(tb);
3266 }
3267 }
3268
3269 int
3270 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3271 {
3272 __be32 status;
3273
3274 args->p = p;
3275 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3276 args->pagelist = rqstp->rq_arg.pages;
3277 args->pagelen = rqstp->rq_arg.page_len;
3278 args->tmpp = NULL;
3279 args->to_free = NULL;
3280 args->ops = args->iops;
3281 args->rqstp = rqstp;
3282
3283 status = nfsd4_decode_compound(args);
3284 if (status) {
3285 nfsd4_release_compoundargs(args);
3286 }
3287 return !status;
3288 }
3289
3290 int
3291 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3292 {
3293 /*
3294 * All that remains is to write the tag and operation count...
3295 */
3296 struct nfsd4_compound_state *cs = &resp->cstate;
3297 struct kvec *iov;
3298 p = resp->tagp;
3299 *p++ = htonl(resp->taglen);
3300 memcpy(p, resp->tag, resp->taglen);
3301 p += XDR_QUADLEN(resp->taglen);
3302 *p++ = htonl(resp->opcnt);
3303
3304 if (rqstp->rq_res.page_len)
3305 iov = &rqstp->rq_res.tail[0];
3306 else
3307 iov = &rqstp->rq_res.head[0];
3308 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3309 BUG_ON(iov->iov_len > PAGE_SIZE);
3310 if (nfsd4_has_session(cs) && cs->status != nfserr_replay_cache) {
3311 nfsd4_store_cache_entry(resp);
3312 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3313 resp->cstate.slot->sl_inuse = false;
3314 nfsd4_put_session(resp->cstate.session);
3315 }
3316 return 1;
3317 }
3318
3319 /*
3320 * Local variables:
3321 * c-basic-offset: 8
3322 * End:
3323 */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree