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romfs: have romfs_fs.h pull in necessary headers
[linux-2.6/next.git] / fs / nfsd / nfs4xdr.c
blobf35a94a0402677d36193c9fcb57992edcc061e9d
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 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1238 {
1239 DECODE_HEAD;
1240
1241 READ_BUF(4);
1242 READ32(rc->rca_one_fs);
1243
1244 DECODE_TAIL;
1245 }
1246
1247 static __be32
1248 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1249 {
1250 return nfs_ok;
1251 }
1252
1253 static __be32
1254 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1255 {
1256 return nfserr_notsupp;
1257 }
1258
1259 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1260
1261 static nfsd4_dec nfsd4_dec_ops[] = {
1262 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1263 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1264 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1265 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1266 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1267 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1268 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1269 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1270 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1271 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1272 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1273 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1274 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1275 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1276 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1277 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1278 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1279 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1280 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1281 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1282 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1283 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1284 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1285 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1286 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1287 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1288 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1289 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1290 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1291 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1292 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1293 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1294 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1295 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1296 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1297 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1298 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1299 };
1300
1301 static nfsd4_dec nfsd41_dec_ops[] = {
1302 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1303 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1304 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1305 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1306 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1307 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1308 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1309 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1310 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1311 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1312 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1313 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1314 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1315 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1316 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1317 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1318 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1319 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1320 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1321 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1322 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1323 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1324 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1325 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1326 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1327 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1328 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1329 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1330 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1331 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1332 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1333 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1334 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1335 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1336 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1337 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1338 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
1339
1340 /* new operations for NFSv4.1 */
1341 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1342 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_notsupp,
1343 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1344 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1345 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1346 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1347 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1348 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1349 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1350 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1351 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1352 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1353 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1354 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1355 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1356 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1357 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1358 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1359 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1360 };
1361
1362 struct nfsd4_minorversion_ops {
1363 nfsd4_dec *decoders;
1364 int nops;
1365 };
1366
1367 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1368 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1369 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1370 };
1371
1372 static __be32
1373 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1374 {
1375 DECODE_HEAD;
1376 struct nfsd4_op *op;
1377 struct nfsd4_minorversion_ops *ops;
1378 int i;
1379
1380 /*
1381 * XXX: According to spec, we should check the tag
1382 * for UTF-8 compliance. I'm postponing this for
1383 * now because it seems that some clients do use
1384 * binary tags.
1385 */
1386 READ_BUF(4);
1387 READ32(argp->taglen);
1388 READ_BUF(argp->taglen + 8);
1389 SAVEMEM(argp->tag, argp->taglen);
1390 READ32(argp->minorversion);
1391 READ32(argp->opcnt);
1392
1393 if (argp->taglen > NFSD4_MAX_TAGLEN)
1394 goto xdr_error;
1395 if (argp->opcnt > 100)
1396 goto xdr_error;
1397
1398 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1399 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1400 if (!argp->ops) {
1401 argp->ops = argp->iops;
1402 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1403 goto xdr_error;
1404 }
1405 }
1406
1407 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1408 argp->opcnt = 0;
1409
1410 ops = &nfsd4_minorversion[argp->minorversion];
1411 for (i = 0; i < argp->opcnt; i++) {
1412 op = &argp->ops[i];
1413 op->replay = NULL;
1414
1415 /*
1416 * We can't use READ_BUF() here because we need to handle
1417 * a missing opcode as an OP_WRITE + 1. So we need to check
1418 * to see if we're truly at the end of our buffer or if there
1419 * is another page we need to flip to.
1420 */
1421
1422 if (argp->p == argp->end) {
1423 if (argp->pagelen < 4) {
1424 /* There isn't an opcode still on the wire */
1425 op->opnum = OP_WRITE + 1;
1426 op->status = nfserr_bad_xdr;
1427 argp->opcnt = i+1;
1428 break;
1429 }
1430
1431 /*
1432 * False alarm. We just hit a page boundary, but there
1433 * is still data available. Move pointer across page
1434 * boundary. *snip from READ_BUF*
1435 */
1436 argp->p = page_address(argp->pagelist[0]);
1437 argp->pagelist++;
1438 if (argp->pagelen < PAGE_SIZE) {
1439 argp->end = argp->p + (argp->pagelen>>2);
1440 argp->pagelen = 0;
1441 } else {
1442 argp->end = argp->p + (PAGE_SIZE>>2);
1443 argp->pagelen -= PAGE_SIZE;
1444 }
1445 }
1446 op->opnum = ntohl(*argp->p++);
1447
1448 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
1449 op->status = ops->decoders[op->opnum](argp, &op->u);
1450 else {
1451 op->opnum = OP_ILLEGAL;
1452 op->status = nfserr_op_illegal;
1453 }
1454
1455 if (op->status) {
1456 argp->opcnt = i+1;
1457 break;
1458 }
1459 }
1460
1461 DECODE_TAIL;
1462 }
1463
1464 #define WRITE32(n) *p++ = htonl(n)
1465 #define WRITE64(n) do { \
1466 *p++ = htonl((u32)((n) >> 32)); \
1467 *p++ = htonl((u32)(n)); \
1468 } while (0)
1469 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1470 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1471 memcpy(p, ptr, nbytes); \
1472 p += XDR_QUADLEN(nbytes); \
1473 }} while (0)
1474
1475 static void write32(__be32 **p, u32 n)
1476 {
1477 *(*p)++ = n;
1478 }
1479
1480 static void write64(__be32 **p, u64 n)
1481 {
1482 write32(p, (u32)(n >> 32));
1483 write32(p, (u32)n);
1484 }
1485
1486 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1487 {
1488 if (IS_I_VERSION(inode)) {
1489 write64(p, inode->i_version);
1490 } else {
1491 write32(p, stat->ctime.tv_sec);
1492 write32(p, stat->ctime.tv_nsec);
1493 }
1494 }
1495
1496 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1497 {
1498 write32(p, c->atomic);
1499 if (c->change_supported) {
1500 write64(p, c->before_change);
1501 write64(p, c->after_change);
1502 } else {
1503 write32(p, c->before_ctime_sec);
1504 write32(p, c->before_ctime_nsec);
1505 write32(p, c->after_ctime_sec);
1506 write32(p, c->after_ctime_nsec);
1507 }
1508 }
1509
1510 #define RESERVE_SPACE(nbytes) do { \
1511 p = resp->p; \
1512 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1513 } while (0)
1514 #define ADJUST_ARGS() resp->p = p
1515
1516 /*
1517 * Header routine to setup seqid operation replay cache
1518 */
1519 #define ENCODE_SEQID_OP_HEAD \
1520 __be32 *save; \
1521 \
1522 save = resp->p;
1523
1524 /*
1525 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1526 * is where sequence id's are incremented, and the replay cache is filled.
1527 * Note that we increment sequence id's here, at the last moment, so we're sure
1528 * we know whether the error to be returned is a sequence id mutating error.
1529 */
1530
1531 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1532 if (seqid_mutating_err(nfserr) && stateowner) { \
1533 stateowner->so_seqid++; \
1534 stateowner->so_replay.rp_status = nfserr; \
1535 stateowner->so_replay.rp_buflen = \
1536 (((char *)(resp)->p - (char *)save)); \
1537 memcpy(stateowner->so_replay.rp_buf, save, \
1538 stateowner->so_replay.rp_buflen); \
1539 } } while (0);
1540
1541 /* Encode as an array of strings the string given with components
1542 * separated @sep.
1543 */
1544 static __be32 nfsd4_encode_components(char sep, char *components,
1545 __be32 **pp, int *buflen)
1546 {
1547 __be32 *p = *pp;
1548 __be32 *countp = p;
1549 int strlen, count=0;
1550 char *str, *end;
1551
1552 dprintk("nfsd4_encode_components(%s)\n", components);
1553 if ((*buflen -= 4) < 0)
1554 return nfserr_resource;
1555 WRITE32(0); /* We will fill this in with @count later */
1556 end = str = components;
1557 while (*end) {
1558 for (; *end && (*end != sep); end++)
1559 ; /* Point to end of component */
1560 strlen = end - str;
1561 if (strlen) {
1562 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1563 return nfserr_resource;
1564 WRITE32(strlen);
1565 WRITEMEM(str, strlen);
1566 count++;
1567 }
1568 else
1569 end++;
1570 str = end;
1571 }
1572 *pp = p;
1573 p = countp;
1574 WRITE32(count);
1575 return 0;
1576 }
1577
1578 /*
1579 * encode a location element of a fs_locations structure
1580 */
1581 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1582 __be32 **pp, int *buflen)
1583 {
1584 __be32 status;
1585 __be32 *p = *pp;
1586
1587 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1588 if (status)
1589 return status;
1590 status = nfsd4_encode_components('/', location->path, &p, buflen);
1591 if (status)
1592 return status;
1593 *pp = p;
1594 return 0;
1595 }
1596
1597 /*
1598 * Return the path to an export point in the pseudo filesystem namespace
1599 * Returned string is safe to use as long as the caller holds a reference
1600 * to @exp.
1601 */
1602 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1603 {
1604 struct svc_fh tmp_fh;
1605 char *path = NULL, *rootpath;
1606 size_t rootlen;
1607
1608 fh_init(&tmp_fh, NFS4_FHSIZE);
1609 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1610 if (*stat)
1611 return NULL;
1612 rootpath = tmp_fh.fh_export->ex_pathname;
1613
1614 path = exp->ex_pathname;
1615
1616 rootlen = strlen(rootpath);
1617 if (strncmp(path, rootpath, rootlen)) {
1618 dprintk("nfsd: fs_locations failed;"
1619 "%s is not contained in %s\n", path, rootpath);
1620 *stat = nfserr_notsupp;
1621 path = NULL;
1622 goto out;
1623 }
1624 path += rootlen;
1625 out:
1626 fh_put(&tmp_fh);
1627 return path;
1628 }
1629
1630 /*
1631 * encode a fs_locations structure
1632 */
1633 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1634 struct svc_export *exp,
1635 __be32 **pp, int *buflen)
1636 {
1637 __be32 status;
1638 int i;
1639 __be32 *p = *pp;
1640 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1641 char *root = nfsd4_path(rqstp, exp, &status);
1642
1643 if (status)
1644 return status;
1645 status = nfsd4_encode_components('/', root, &p, buflen);
1646 if (status)
1647 return status;
1648 if ((*buflen -= 4) < 0)
1649 return nfserr_resource;
1650 WRITE32(fslocs->locations_count);
1651 for (i=0; i<fslocs->locations_count; i++) {
1652 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1653 &p, buflen);
1654 if (status)
1655 return status;
1656 }
1657 *pp = p;
1658 return 0;
1659 }
1660
1661 static u32 nfs4_ftypes[16] = {
1662 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1663 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1664 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1665 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1666 };
1667
1668 static __be32
1669 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1670 __be32 **p, int *buflen)
1671 {
1672 int status;
1673
1674 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1675 return nfserr_resource;
1676 if (whotype != NFS4_ACL_WHO_NAMED)
1677 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1678 else if (group)
1679 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1680 else
1681 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1682 if (status < 0)
1683 return nfserrno(status);
1684 *p = xdr_encode_opaque(*p, NULL, status);
1685 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1686 BUG_ON(*buflen < 0);
1687 return 0;
1688 }
1689
1690 static inline __be32
1691 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1692 {
1693 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1694 }
1695
1696 static inline __be32
1697 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1698 {
1699 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1700 }
1701
1702 static inline __be32
1703 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1704 __be32 **p, int *buflen)
1705 {
1706 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1707 }
1708
1709 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1710 FATTR4_WORD0_RDATTR_ERROR)
1711 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1712
1713 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1714 {
1715 /* As per referral draft: */
1716 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1717 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1718 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1719 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1720 *rdattr_err = NFSERR_MOVED;
1721 else
1722 return nfserr_moved;
1723 }
1724 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1725 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1726 return 0;
1727 }
1728
1729 /*
1730 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1731 * ourselves.
1732 *
1733 * @countp is the buffer size in _words_; upon successful return this becomes
1734 * replaced with the number of words written.
1735 */
1736 __be32
1737 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1738 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1739 struct svc_rqst *rqstp, int ignore_crossmnt)
1740 {
1741 u32 bmval0 = bmval[0];
1742 u32 bmval1 = bmval[1];
1743 u32 bmval2 = bmval[2];
1744 struct kstat stat;
1745 struct svc_fh tempfh;
1746 struct kstatfs statfs;
1747 int buflen = *countp << 2;
1748 __be32 *attrlenp;
1749 u32 dummy;
1750 u64 dummy64;
1751 u32 rdattr_err = 0;
1752 __be32 *p = buffer;
1753 __be32 status;
1754 int err;
1755 int aclsupport = 0;
1756 struct nfs4_acl *acl = NULL;
1757 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1758 u32 minorversion = resp->cstate.minorversion;
1759 struct path path = {
1760 .mnt = exp->ex_path.mnt,
1761 .dentry = dentry,
1762 };
1763
1764 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1765 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1766 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1767 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1768
1769 if (exp->ex_fslocs.migrated) {
1770 BUG_ON(bmval[2]);
1771 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1772 if (status)
1773 goto out;
1774 }
1775
1776 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1777 if (err)
1778 goto out_nfserr;
1779 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1780 FATTR4_WORD0_MAXNAME)) ||
1781 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1782 FATTR4_WORD1_SPACE_TOTAL))) {
1783 err = vfs_statfs(&path, &statfs);
1784 if (err)
1785 goto out_nfserr;
1786 }
1787 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1788 fh_init(&tempfh, NFS4_FHSIZE);
1789 status = fh_compose(&tempfh, exp, dentry, NULL);
1790 if (status)
1791 goto out;
1792 fhp = &tempfh;
1793 }
1794 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1795 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1796 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1797 aclsupport = (err == 0);
1798 if (bmval0 & FATTR4_WORD0_ACL) {
1799 if (err == -EOPNOTSUPP)
1800 bmval0 &= ~FATTR4_WORD0_ACL;
1801 else if (err == -EINVAL) {
1802 status = nfserr_attrnotsupp;
1803 goto out;
1804 } else if (err != 0)
1805 goto out_nfserr;
1806 }
1807 }
1808
1809 if (bmval2) {
1810 if ((buflen -= 16) < 0)
1811 goto out_resource;
1812 WRITE32(3);
1813 WRITE32(bmval0);
1814 WRITE32(bmval1);
1815 WRITE32(bmval2);
1816 } else if (bmval1) {
1817 if ((buflen -= 12) < 0)
1818 goto out_resource;
1819 WRITE32(2);
1820 WRITE32(bmval0);
1821 WRITE32(bmval1);
1822 } else {
1823 if ((buflen -= 8) < 0)
1824 goto out_resource;
1825 WRITE32(1);
1826 WRITE32(bmval0);
1827 }
1828 attrlenp = p++; /* to be backfilled later */
1829
1830 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1831 u32 word0 = nfsd_suppattrs0(minorversion);
1832 u32 word1 = nfsd_suppattrs1(minorversion);
1833 u32 word2 = nfsd_suppattrs2(minorversion);
1834
1835 if (!aclsupport)
1836 word0 &= ~FATTR4_WORD0_ACL;
1837 if (!word2) {
1838 if ((buflen -= 12) < 0)
1839 goto out_resource;
1840 WRITE32(2);
1841 WRITE32(word0);
1842 WRITE32(word1);
1843 } else {
1844 if ((buflen -= 16) < 0)
1845 goto out_resource;
1846 WRITE32(3);
1847 WRITE32(word0);
1848 WRITE32(word1);
1849 WRITE32(word2);
1850 }
1851 }
1852 if (bmval0 & FATTR4_WORD0_TYPE) {
1853 if ((buflen -= 4) < 0)
1854 goto out_resource;
1855 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1856 if (dummy == NF4BAD)
1857 goto out_serverfault;
1858 WRITE32(dummy);
1859 }
1860 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1861 if ((buflen -= 4) < 0)
1862 goto out_resource;
1863 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1864 WRITE32(NFS4_FH_PERSISTENT);
1865 else
1866 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1867 }
1868 if (bmval0 & FATTR4_WORD0_CHANGE) {
1869 if ((buflen -= 8) < 0)
1870 goto out_resource;
1871 write_change(&p, &stat, dentry->d_inode);
1872 }
1873 if (bmval0 & FATTR4_WORD0_SIZE) {
1874 if ((buflen -= 8) < 0)
1875 goto out_resource;
1876 WRITE64(stat.size);
1877 }
1878 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1879 if ((buflen -= 4) < 0)
1880 goto out_resource;
1881 WRITE32(1);
1882 }
1883 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1884 if ((buflen -= 4) < 0)
1885 goto out_resource;
1886 WRITE32(1);
1887 }
1888 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1889 if ((buflen -= 4) < 0)
1890 goto out_resource;
1891 WRITE32(0);
1892 }
1893 if (bmval0 & FATTR4_WORD0_FSID) {
1894 if ((buflen -= 16) < 0)
1895 goto out_resource;
1896 if (exp->ex_fslocs.migrated) {
1897 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1898 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1899 } else switch(fsid_source(fhp)) {
1900 case FSIDSOURCE_FSID:
1901 WRITE64((u64)exp->ex_fsid);
1902 WRITE64((u64)0);
1903 break;
1904 case FSIDSOURCE_DEV:
1905 WRITE32(0);
1906 WRITE32(MAJOR(stat.dev));
1907 WRITE32(0);
1908 WRITE32(MINOR(stat.dev));
1909 break;
1910 case FSIDSOURCE_UUID:
1911 WRITEMEM(exp->ex_uuid, 16);
1912 break;
1913 }
1914 }
1915 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1916 if ((buflen -= 4) < 0)
1917 goto out_resource;
1918 WRITE32(0);
1919 }
1920 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1921 if ((buflen -= 4) < 0)
1922 goto out_resource;
1923 WRITE32(nfsd4_lease);
1924 }
1925 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1926 if ((buflen -= 4) < 0)
1927 goto out_resource;
1928 WRITE32(rdattr_err);
1929 }
1930 if (bmval0 & FATTR4_WORD0_ACL) {
1931 struct nfs4_ace *ace;
1932
1933 if (acl == NULL) {
1934 if ((buflen -= 4) < 0)
1935 goto out_resource;
1936
1937 WRITE32(0);
1938 goto out_acl;
1939 }
1940 if ((buflen -= 4) < 0)
1941 goto out_resource;
1942 WRITE32(acl->naces);
1943
1944 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1945 if ((buflen -= 4*3) < 0)
1946 goto out_resource;
1947 WRITE32(ace->type);
1948 WRITE32(ace->flag);
1949 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1950 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1951 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1952 &p, &buflen);
1953 if (status == nfserr_resource)
1954 goto out_resource;
1955 if (status)
1956 goto out;
1957 }
1958 }
1959 out_acl:
1960 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1961 if ((buflen -= 4) < 0)
1962 goto out_resource;
1963 WRITE32(aclsupport ?
1964 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1965 }
1966 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1967 if ((buflen -= 4) < 0)
1968 goto out_resource;
1969 WRITE32(1);
1970 }
1971 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1972 if ((buflen -= 4) < 0)
1973 goto out_resource;
1974 WRITE32(1);
1975 }
1976 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1977 if ((buflen -= 4) < 0)
1978 goto out_resource;
1979 WRITE32(1);
1980 }
1981 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1982 if ((buflen -= 4) < 0)
1983 goto out_resource;
1984 WRITE32(1);
1985 }
1986 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1987 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1988 if (buflen < 0)
1989 goto out_resource;
1990 WRITE32(fhp->fh_handle.fh_size);
1991 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1992 }
1993 if (bmval0 & FATTR4_WORD0_FILEID) {
1994 if ((buflen -= 8) < 0)
1995 goto out_resource;
1996 WRITE64(stat.ino);
1997 }
1998 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1999 if ((buflen -= 8) < 0)
2000 goto out_resource;
2001 WRITE64((u64) statfs.f_ffree);
2002 }
2003 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2004 if ((buflen -= 8) < 0)
2005 goto out_resource;
2006 WRITE64((u64) statfs.f_ffree);
2007 }
2008 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2009 if ((buflen -= 8) < 0)
2010 goto out_resource;
2011 WRITE64((u64) statfs.f_files);
2012 }
2013 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2014 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2015 if (status == nfserr_resource)
2016 goto out_resource;
2017 if (status)
2018 goto out;
2019 }
2020 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2021 if ((buflen -= 4) < 0)
2022 goto out_resource;
2023 WRITE32(1);
2024 }
2025 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2026 if ((buflen -= 8) < 0)
2027 goto out_resource;
2028 WRITE64(~(u64)0);
2029 }
2030 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2031 if ((buflen -= 4) < 0)
2032 goto out_resource;
2033 WRITE32(255);
2034 }
2035 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2036 if ((buflen -= 4) < 0)
2037 goto out_resource;
2038 WRITE32(statfs.f_namelen);
2039 }
2040 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2041 if ((buflen -= 8) < 0)
2042 goto out_resource;
2043 WRITE64((u64) svc_max_payload(rqstp));
2044 }
2045 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2046 if ((buflen -= 8) < 0)
2047 goto out_resource;
2048 WRITE64((u64) svc_max_payload(rqstp));
2049 }
2050 if (bmval1 & FATTR4_WORD1_MODE) {
2051 if ((buflen -= 4) < 0)
2052 goto out_resource;
2053 WRITE32(stat.mode & S_IALLUGO);
2054 }
2055 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2056 if ((buflen -= 4) < 0)
2057 goto out_resource;
2058 WRITE32(1);
2059 }
2060 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2061 if ((buflen -= 4) < 0)
2062 goto out_resource;
2063 WRITE32(stat.nlink);
2064 }
2065 if (bmval1 & FATTR4_WORD1_OWNER) {
2066 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2067 if (status == nfserr_resource)
2068 goto out_resource;
2069 if (status)
2070 goto out;
2071 }
2072 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2073 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2074 if (status == nfserr_resource)
2075 goto out_resource;
2076 if (status)
2077 goto out;
2078 }
2079 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2080 if ((buflen -= 8) < 0)
2081 goto out_resource;
2082 WRITE32((u32) MAJOR(stat.rdev));
2083 WRITE32((u32) MINOR(stat.rdev));
2084 }
2085 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2086 if ((buflen -= 8) < 0)
2087 goto out_resource;
2088 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2089 WRITE64(dummy64);
2090 }
2091 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2092 if ((buflen -= 8) < 0)
2093 goto out_resource;
2094 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2095 WRITE64(dummy64);
2096 }
2097 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2098 if ((buflen -= 8) < 0)
2099 goto out_resource;
2100 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2101 WRITE64(dummy64);
2102 }
2103 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2104 if ((buflen -= 8) < 0)
2105 goto out_resource;
2106 dummy64 = (u64)stat.blocks << 9;
2107 WRITE64(dummy64);
2108 }
2109 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2110 if ((buflen -= 12) < 0)
2111 goto out_resource;
2112 WRITE32(0);
2113 WRITE32(stat.atime.tv_sec);
2114 WRITE32(stat.atime.tv_nsec);
2115 }
2116 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2117 if ((buflen -= 12) < 0)
2118 goto out_resource;
2119 WRITE32(0);
2120 WRITE32(1);
2121 WRITE32(0);
2122 }
2123 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2124 if ((buflen -= 12) < 0)
2125 goto out_resource;
2126 WRITE32(0);
2127 WRITE32(stat.ctime.tv_sec);
2128 WRITE32(stat.ctime.tv_nsec);
2129 }
2130 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2131 if ((buflen -= 12) < 0)
2132 goto out_resource;
2133 WRITE32(0);
2134 WRITE32(stat.mtime.tv_sec);
2135 WRITE32(stat.mtime.tv_nsec);
2136 }
2137 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2138 if ((buflen -= 8) < 0)
2139 goto out_resource;
2140 /*
2141 * Get parent's attributes if not ignoring crossmount
2142 * and this is the root of a cross-mounted filesystem.
2143 */
2144 if (ignore_crossmnt == 0 &&
2145 dentry == exp->ex_path.mnt->mnt_root) {
2146 struct path path = exp->ex_path;
2147 path_get(&path);
2148 while (follow_up(&path)) {
2149 if (path.dentry != path.mnt->mnt_root)
2150 break;
2151 }
2152 err = vfs_getattr(path.mnt, path.dentry, &stat);
2153 path_put(&path);
2154 if (err)
2155 goto out_nfserr;
2156 }
2157 WRITE64(stat.ino);
2158 }
2159 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2160 WRITE32(3);
2161 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2162 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2163 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2164 }
2165
2166 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2167 *countp = p - buffer;
2168 status = nfs_ok;
2169
2170 out:
2171 kfree(acl);
2172 if (fhp == &tempfh)
2173 fh_put(&tempfh);
2174 return status;
2175 out_nfserr:
2176 status = nfserrno(err);
2177 goto out;
2178 out_resource:
2179 *countp = 0;
2180 status = nfserr_resource;
2181 goto out;
2182 out_serverfault:
2183 status = nfserr_serverfault;
2184 goto out;
2185 }
2186
2187 static inline int attributes_need_mount(u32 *bmval)
2188 {
2189 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2190 return 1;
2191 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2192 return 1;
2193 return 0;
2194 }
2195
2196 static __be32
2197 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2198 const char *name, int namlen, __be32 *p, int *buflen)
2199 {
2200 struct svc_export *exp = cd->rd_fhp->fh_export;
2201 struct dentry *dentry;
2202 __be32 nfserr;
2203 int ignore_crossmnt = 0;
2204
2205 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2206 if (IS_ERR(dentry))
2207 return nfserrno(PTR_ERR(dentry));
2208 if (!dentry->d_inode) {
2209 /*
2210 * nfsd_buffered_readdir drops the i_mutex between
2211 * readdir and calling this callback, leaving a window
2212 * where this directory entry could have gone away.
2213 */
2214 dput(dentry);
2215 return nfserr_noent;
2216 }
2217
2218 exp_get(exp);
2219 /*
2220 * In the case of a mountpoint, the client may be asking for
2221 * attributes that are only properties of the underlying filesystem
2222 * as opposed to the cross-mounted file system. In such a case,
2223 * we will not follow the cross mount and will fill the attribtutes
2224 * directly from the mountpoint dentry.
2225 */
2226 if (nfsd_mountpoint(dentry, exp)) {
2227 int err;
2228
2229 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2230 && !attributes_need_mount(cd->rd_bmval)) {
2231 ignore_crossmnt = 1;
2232 goto out_encode;
2233 }
2234 /*
2235 * Why the heck aren't we just using nfsd_lookup??
2236 * Different "."/".." handling? Something else?
2237 * At least, add a comment here to explain....
2238 */
2239 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2240 if (err) {
2241 nfserr = nfserrno(err);
2242 goto out_put;
2243 }
2244 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2245 if (nfserr)
2246 goto out_put;
2247
2248 }
2249 out_encode:
2250 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2251 cd->rd_rqstp, ignore_crossmnt);
2252 out_put:
2253 dput(dentry);
2254 exp_put(exp);
2255 return nfserr;
2256 }
2257
2258 static __be32 *
2259 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2260 {
2261 __be32 *attrlenp;
2262
2263 if (buflen < 6)
2264 return NULL;
2265 *p++ = htonl(2);
2266 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2267 *p++ = htonl(0); /* bmval1 */
2268
2269 attrlenp = p++;
2270 *p++ = nfserr; /* no htonl */
2271 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2272 return p;
2273 }
2274
2275 static int
2276 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2277 loff_t offset, u64 ino, unsigned int d_type)
2278 {
2279 struct readdir_cd *ccd = ccdv;
2280 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2281 int buflen;
2282 __be32 *p = cd->buffer;
2283 __be32 *cookiep;
2284 __be32 nfserr = nfserr_toosmall;
2285
2286 /* In nfsv4, "." and ".." never make it onto the wire.. */
2287 if (name && isdotent(name, namlen)) {
2288 cd->common.err = nfs_ok;
2289 return 0;
2290 }
2291
2292 if (cd->offset)
2293 xdr_encode_hyper(cd->offset, (u64) offset);
2294
2295 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2296 if (buflen < 0)
2297 goto fail;
2298
2299 *p++ = xdr_one; /* mark entry present */
2300 cookiep = p;
2301 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2302 p = xdr_encode_array(p, name, namlen); /* name length & name */
2303
2304 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2305 switch (nfserr) {
2306 case nfs_ok:
2307 p += buflen;
2308 break;
2309 case nfserr_resource:
2310 nfserr = nfserr_toosmall;
2311 goto fail;
2312 case nfserr_dropit:
2313 goto fail;
2314 case nfserr_noent:
2315 goto skip_entry;
2316 default:
2317 /*
2318 * If the client requested the RDATTR_ERROR attribute,
2319 * we stuff the error code into this attribute
2320 * and continue. If this attribute was not requested,
2321 * then in accordance with the spec, we fail the
2322 * entire READDIR operation(!)
2323 */
2324 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2325 goto fail;
2326 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2327 if (p == NULL) {
2328 nfserr = nfserr_toosmall;
2329 goto fail;
2330 }
2331 }
2332 cd->buflen -= (p - cd->buffer);
2333 cd->buffer = p;
2334 cd->offset = cookiep;
2335 skip_entry:
2336 cd->common.err = nfs_ok;
2337 return 0;
2338 fail:
2339 cd->common.err = nfserr;
2340 return -EINVAL;
2341 }
2342
2343 static void
2344 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2345 {
2346 __be32 *p;
2347
2348 RESERVE_SPACE(sizeof(stateid_t));
2349 WRITE32(sid->si_generation);
2350 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2351 ADJUST_ARGS();
2352 }
2353
2354 static __be32
2355 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2356 {
2357 __be32 *p;
2358
2359 if (!nfserr) {
2360 RESERVE_SPACE(8);
2361 WRITE32(access->ac_supported);
2362 WRITE32(access->ac_resp_access);
2363 ADJUST_ARGS();
2364 }
2365 return nfserr;
2366 }
2367
2368 static __be32
2369 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2370 {
2371 ENCODE_SEQID_OP_HEAD;
2372
2373 if (!nfserr)
2374 nfsd4_encode_stateid(resp, &close->cl_stateid);
2375
2376 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2377 return nfserr;
2378 }
2379
2380
2381 static __be32
2382 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2383 {
2384 __be32 *p;
2385
2386 if (!nfserr) {
2387 RESERVE_SPACE(8);
2388 WRITEMEM(commit->co_verf.data, 8);
2389 ADJUST_ARGS();
2390 }
2391 return nfserr;
2392 }
2393
2394 static __be32
2395 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2396 {
2397 __be32 *p;
2398
2399 if (!nfserr) {
2400 RESERVE_SPACE(32);
2401 write_cinfo(&p, &create->cr_cinfo);
2402 WRITE32(2);
2403 WRITE32(create->cr_bmval[0]);
2404 WRITE32(create->cr_bmval[1]);
2405 ADJUST_ARGS();
2406 }
2407 return nfserr;
2408 }
2409
2410 static __be32
2411 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2412 {
2413 struct svc_fh *fhp = getattr->ga_fhp;
2414 int buflen;
2415
2416 if (nfserr)
2417 return nfserr;
2418
2419 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2420 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2421 resp->p, &buflen, getattr->ga_bmval,
2422 resp->rqstp, 0);
2423 if (!nfserr)
2424 resp->p += buflen;
2425 return nfserr;
2426 }
2427
2428 static __be32
2429 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2430 {
2431 struct svc_fh *fhp = *fhpp;
2432 unsigned int len;
2433 __be32 *p;
2434
2435 if (!nfserr) {
2436 len = fhp->fh_handle.fh_size;
2437 RESERVE_SPACE(len + 4);
2438 WRITE32(len);
2439 WRITEMEM(&fhp->fh_handle.fh_base, len);
2440 ADJUST_ARGS();
2441 }
2442 return nfserr;
2443 }
2444
2445 /*
2446 * Including all fields other than the name, a LOCK4denied structure requires
2447 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2448 */
2449 static void
2450 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2451 {
2452 __be32 *p;
2453
2454 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2455 WRITE64(ld->ld_start);
2456 WRITE64(ld->ld_length);
2457 WRITE32(ld->ld_type);
2458 if (ld->ld_sop) {
2459 WRITEMEM(&ld->ld_clientid, 8);
2460 WRITE32(ld->ld_sop->so_owner.len);
2461 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2462 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2463 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2464 WRITE64((u64)0); /* clientid */
2465 WRITE32(0); /* length of owner name */
2466 }
2467 ADJUST_ARGS();
2468 }
2469
2470 static __be32
2471 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2472 {
2473 ENCODE_SEQID_OP_HEAD;
2474
2475 if (!nfserr)
2476 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2477 else if (nfserr == nfserr_denied)
2478 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2479
2480 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2481 return nfserr;
2482 }
2483
2484 static __be32
2485 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2486 {
2487 if (nfserr == nfserr_denied)
2488 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2489 return nfserr;
2490 }
2491
2492 static __be32
2493 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2494 {
2495 ENCODE_SEQID_OP_HEAD;
2496
2497 if (!nfserr)
2498 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2499
2500 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2501 return nfserr;
2502 }
2503
2504
2505 static __be32
2506 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2507 {
2508 __be32 *p;
2509
2510 if (!nfserr) {
2511 RESERVE_SPACE(20);
2512 write_cinfo(&p, &link->li_cinfo);
2513 ADJUST_ARGS();
2514 }
2515 return nfserr;
2516 }
2517
2518
2519 static __be32
2520 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2521 {
2522 __be32 *p;
2523 ENCODE_SEQID_OP_HEAD;
2524
2525 if (nfserr)
2526 goto out;
2527
2528 nfsd4_encode_stateid(resp, &open->op_stateid);
2529 RESERVE_SPACE(40);
2530 write_cinfo(&p, &open->op_cinfo);
2531 WRITE32(open->op_rflags);
2532 WRITE32(2);
2533 WRITE32(open->op_bmval[0]);
2534 WRITE32(open->op_bmval[1]);
2535 WRITE32(open->op_delegate_type);
2536 ADJUST_ARGS();
2537
2538 switch (open->op_delegate_type) {
2539 case NFS4_OPEN_DELEGATE_NONE:
2540 break;
2541 case NFS4_OPEN_DELEGATE_READ:
2542 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2543 RESERVE_SPACE(20);
2544 WRITE32(open->op_recall);
2545
2546 /*
2547 * TODO: ACE's in delegations
2548 */
2549 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2550 WRITE32(0);
2551 WRITE32(0);
2552 WRITE32(0); /* XXX: is NULL principal ok? */
2553 ADJUST_ARGS();
2554 break;
2555 case NFS4_OPEN_DELEGATE_WRITE:
2556 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2557 RESERVE_SPACE(32);
2558 WRITE32(0);
2559
2560 /*
2561 * TODO: space_limit's in delegations
2562 */
2563 WRITE32(NFS4_LIMIT_SIZE);
2564 WRITE32(~(u32)0);
2565 WRITE32(~(u32)0);
2566
2567 /*
2568 * TODO: ACE's in delegations
2569 */
2570 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2571 WRITE32(0);
2572 WRITE32(0);
2573 WRITE32(0); /* XXX: is NULL principal ok? */
2574 ADJUST_ARGS();
2575 break;
2576 default:
2577 BUG();
2578 }
2579 /* XXX save filehandle here */
2580 out:
2581 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2582 return nfserr;
2583 }
2584
2585 static __be32
2586 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2587 {
2588 ENCODE_SEQID_OP_HEAD;
2589
2590 if (!nfserr)
2591 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2592
2593 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2594 return nfserr;
2595 }
2596
2597 static __be32
2598 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2599 {
2600 ENCODE_SEQID_OP_HEAD;
2601
2602 if (!nfserr)
2603 nfsd4_encode_stateid(resp, &od->od_stateid);
2604
2605 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2606 return nfserr;
2607 }
2608
2609 static __be32
2610 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2611 struct nfsd4_read *read)
2612 {
2613 u32 eof;
2614 int v, pn;
2615 unsigned long maxcount;
2616 long len;
2617 __be32 *p;
2618
2619 if (nfserr)
2620 return nfserr;
2621 if (resp->xbuf->page_len)
2622 return nfserr_resource;
2623
2624 RESERVE_SPACE(8); /* eof flag and byte count */
2625
2626 maxcount = svc_max_payload(resp->rqstp);
2627 if (maxcount > read->rd_length)
2628 maxcount = read->rd_length;
2629
2630 len = maxcount;
2631 v = 0;
2632 while (len > 0) {
2633 pn = resp->rqstp->rq_resused++;
2634 resp->rqstp->rq_vec[v].iov_base =
2635 page_address(resp->rqstp->rq_respages[pn]);
2636 resp->rqstp->rq_vec[v].iov_len =
2637 len < PAGE_SIZE ? len : PAGE_SIZE;
2638 v++;
2639 len -= PAGE_SIZE;
2640 }
2641 read->rd_vlen = v;
2642
2643 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2644 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2645 &maxcount);
2646
2647 if (nfserr == nfserr_symlink)
2648 nfserr = nfserr_inval;
2649 if (nfserr)
2650 return nfserr;
2651 eof = (read->rd_offset + maxcount >=
2652 read->rd_fhp->fh_dentry->d_inode->i_size);
2653
2654 WRITE32(eof);
2655 WRITE32(maxcount);
2656 ADJUST_ARGS();
2657 resp->xbuf->head[0].iov_len = (char*)p
2658 - (char*)resp->xbuf->head[0].iov_base;
2659 resp->xbuf->page_len = maxcount;
2660
2661 /* Use rest of head for padding and remaining ops: */
2662 resp->xbuf->tail[0].iov_base = p;
2663 resp->xbuf->tail[0].iov_len = 0;
2664 if (maxcount&3) {
2665 RESERVE_SPACE(4);
2666 WRITE32(0);
2667 resp->xbuf->tail[0].iov_base += maxcount&3;
2668 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2669 ADJUST_ARGS();
2670 }
2671 return 0;
2672 }
2673
2674 static __be32
2675 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2676 {
2677 int maxcount;
2678 char *page;
2679 __be32 *p;
2680
2681 if (nfserr)
2682 return nfserr;
2683 if (resp->xbuf->page_len)
2684 return nfserr_resource;
2685
2686 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2687
2688 maxcount = PAGE_SIZE;
2689 RESERVE_SPACE(4);
2690
2691 /*
2692 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2693 * if they would overflow the buffer. Is this kosher in NFSv4? If
2694 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2695 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2696 */
2697 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2698 if (nfserr == nfserr_isdir)
2699 return nfserr_inval;
2700 if (nfserr)
2701 return nfserr;
2702
2703 WRITE32(maxcount);
2704 ADJUST_ARGS();
2705 resp->xbuf->head[0].iov_len = (char*)p
2706 - (char*)resp->xbuf->head[0].iov_base;
2707 resp->xbuf->page_len = maxcount;
2708
2709 /* Use rest of head for padding and remaining ops: */
2710 resp->xbuf->tail[0].iov_base = p;
2711 resp->xbuf->tail[0].iov_len = 0;
2712 if (maxcount&3) {
2713 RESERVE_SPACE(4);
2714 WRITE32(0);
2715 resp->xbuf->tail[0].iov_base += maxcount&3;
2716 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2717 ADJUST_ARGS();
2718 }
2719 return 0;
2720 }
2721
2722 static __be32
2723 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2724 {
2725 int maxcount;
2726 loff_t offset;
2727 __be32 *page, *savep, *tailbase;
2728 __be32 *p;
2729
2730 if (nfserr)
2731 return nfserr;
2732 if (resp->xbuf->page_len)
2733 return nfserr_resource;
2734
2735 RESERVE_SPACE(8); /* verifier */
2736 savep = p;
2737
2738 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2739 WRITE32(0);
2740 WRITE32(0);
2741 ADJUST_ARGS();
2742 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2743 tailbase = p;
2744
2745 maxcount = PAGE_SIZE;
2746 if (maxcount > readdir->rd_maxcount)
2747 maxcount = readdir->rd_maxcount;
2748
2749 /*
2750 * Convert from bytes to words, account for the two words already
2751 * written, make sure to leave two words at the end for the next
2752 * pointer and eof field.
2753 */
2754 maxcount = (maxcount >> 2) - 4;
2755 if (maxcount < 0) {
2756 nfserr = nfserr_toosmall;
2757 goto err_no_verf;
2758 }
2759
2760 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2761 readdir->common.err = 0;
2762 readdir->buflen = maxcount;
2763 readdir->buffer = page;
2764 readdir->offset = NULL;
2765
2766 offset = readdir->rd_cookie;
2767 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2768 &offset,
2769 &readdir->common, nfsd4_encode_dirent);
2770 if (nfserr == nfs_ok &&
2771 readdir->common.err == nfserr_toosmall &&
2772 readdir->buffer == page)
2773 nfserr = nfserr_toosmall;
2774 if (nfserr == nfserr_symlink)
2775 nfserr = nfserr_notdir;
2776 if (nfserr)
2777 goto err_no_verf;
2778
2779 if (readdir->offset)
2780 xdr_encode_hyper(readdir->offset, offset);
2781
2782 p = readdir->buffer;
2783 *p++ = 0; /* no more entries */
2784 *p++ = htonl(readdir->common.err == nfserr_eof);
2785 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2786 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2787
2788 /* Use rest of head for padding and remaining ops: */
2789 resp->xbuf->tail[0].iov_base = tailbase;
2790 resp->xbuf->tail[0].iov_len = 0;
2791 resp->p = resp->xbuf->tail[0].iov_base;
2792 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2793
2794 return 0;
2795 err_no_verf:
2796 p = savep;
2797 ADJUST_ARGS();
2798 return nfserr;
2799 }
2800
2801 static __be32
2802 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2803 {
2804 __be32 *p;
2805
2806 if (!nfserr) {
2807 RESERVE_SPACE(20);
2808 write_cinfo(&p, &remove->rm_cinfo);
2809 ADJUST_ARGS();
2810 }
2811 return nfserr;
2812 }
2813
2814 static __be32
2815 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2816 {
2817 __be32 *p;
2818
2819 if (!nfserr) {
2820 RESERVE_SPACE(40);
2821 write_cinfo(&p, &rename->rn_sinfo);
2822 write_cinfo(&p, &rename->rn_tinfo);
2823 ADJUST_ARGS();
2824 }
2825 return nfserr;
2826 }
2827
2828 static __be32
2829 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2830 struct nfsd4_secinfo *secinfo)
2831 {
2832 int i = 0;
2833 struct svc_export *exp = secinfo->si_exp;
2834 u32 nflavs;
2835 struct exp_flavor_info *flavs;
2836 struct exp_flavor_info def_flavs[2];
2837 __be32 *p;
2838
2839 if (nfserr)
2840 goto out;
2841 if (exp->ex_nflavors) {
2842 flavs = exp->ex_flavors;
2843 nflavs = exp->ex_nflavors;
2844 } else { /* Handling of some defaults in absence of real secinfo: */
2845 flavs = def_flavs;
2846 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2847 nflavs = 2;
2848 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2849 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2850 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2851 nflavs = 1;
2852 flavs[0].pseudoflavor
2853 = svcauth_gss_flavor(exp->ex_client);
2854 } else {
2855 nflavs = 1;
2856 flavs[0].pseudoflavor
2857 = exp->ex_client->flavour->flavour;
2858 }
2859 }
2860
2861 RESERVE_SPACE(4);
2862 WRITE32(nflavs);
2863 ADJUST_ARGS();
2864 for (i = 0; i < nflavs; i++) {
2865 u32 flav = flavs[i].pseudoflavor;
2866 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2867
2868 if (gm) {
2869 RESERVE_SPACE(4);
2870 WRITE32(RPC_AUTH_GSS);
2871 ADJUST_ARGS();
2872 RESERVE_SPACE(4 + gm->gm_oid.len);
2873 WRITE32(gm->gm_oid.len);
2874 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2875 ADJUST_ARGS();
2876 RESERVE_SPACE(4);
2877 WRITE32(0); /* qop */
2878 ADJUST_ARGS();
2879 RESERVE_SPACE(4);
2880 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2881 ADJUST_ARGS();
2882 gss_mech_put(gm);
2883 } else {
2884 RESERVE_SPACE(4);
2885 WRITE32(flav);
2886 ADJUST_ARGS();
2887 }
2888 }
2889 out:
2890 if (exp)
2891 exp_put(exp);
2892 return nfserr;
2893 }
2894
2895 /*
2896 * The SETATTR encode routine is special -- it always encodes a bitmap,
2897 * regardless of the error status.
2898 */
2899 static __be32
2900 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2901 {
2902 __be32 *p;
2903
2904 RESERVE_SPACE(12);
2905 if (nfserr) {
2906 WRITE32(2);
2907 WRITE32(0);
2908 WRITE32(0);
2909 }
2910 else {
2911 WRITE32(2);
2912 WRITE32(setattr->sa_bmval[0]);
2913 WRITE32(setattr->sa_bmval[1]);
2914 }
2915 ADJUST_ARGS();
2916 return nfserr;
2917 }
2918
2919 static __be32
2920 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2921 {
2922 __be32 *p;
2923
2924 if (!nfserr) {
2925 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2926 WRITEMEM(&scd->se_clientid, 8);
2927 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2928 ADJUST_ARGS();
2929 }
2930 else if (nfserr == nfserr_clid_inuse) {
2931 RESERVE_SPACE(8);
2932 WRITE32(0);
2933 WRITE32(0);
2934 ADJUST_ARGS();
2935 }
2936 return nfserr;
2937 }
2938
2939 static __be32
2940 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2941 {
2942 __be32 *p;
2943
2944 if (!nfserr) {
2945 RESERVE_SPACE(16);
2946 WRITE32(write->wr_bytes_written);
2947 WRITE32(write->wr_how_written);
2948 WRITEMEM(write->wr_verifier.data, 8);
2949 ADJUST_ARGS();
2950 }
2951 return nfserr;
2952 }
2953
2954 static __be32
2955 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2956 struct nfsd4_exchange_id *exid)
2957 {
2958 __be32 *p;
2959 char *major_id;
2960 char *server_scope;
2961 int major_id_sz;
2962 int server_scope_sz;
2963 uint64_t minor_id = 0;
2964
2965 if (nfserr)
2966 return nfserr;
2967
2968 major_id = utsname()->nodename;
2969 major_id_sz = strlen(major_id);
2970 server_scope = utsname()->nodename;
2971 server_scope_sz = strlen(server_scope);
2972
2973 RESERVE_SPACE(
2974 8 /* eir_clientid */ +
2975 4 /* eir_sequenceid */ +
2976 4 /* eir_flags */ +
2977 4 /* spr_how (SP4_NONE) */ +
2978 8 /* so_minor_id */ +
2979 4 /* so_major_id.len */ +
2980 (XDR_QUADLEN(major_id_sz) * 4) +
2981 4 /* eir_server_scope.len */ +
2982 (XDR_QUADLEN(server_scope_sz) * 4) +
2983 4 /* eir_server_impl_id.count (0) */);
2984
2985 WRITEMEM(&exid->clientid, 8);
2986 WRITE32(exid->seqid);
2987 WRITE32(exid->flags);
2988
2989 /* state_protect4_r. Currently only support SP4_NONE */
2990 BUG_ON(exid->spa_how != SP4_NONE);
2991 WRITE32(exid->spa_how);
2992
2993 /* The server_owner struct */
2994 WRITE64(minor_id); /* Minor id */
2995 /* major id */
2996 WRITE32(major_id_sz);
2997 WRITEMEM(major_id, major_id_sz);
2998
2999 /* Server scope */
3000 WRITE32(server_scope_sz);
3001 WRITEMEM(server_scope, server_scope_sz);
3002
3003 /* Implementation id */
3004 WRITE32(0); /* zero length nfs_impl_id4 array */
3005 ADJUST_ARGS();
3006 return 0;
3007 }
3008
3009 static __be32
3010 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
3011 struct nfsd4_create_session *sess)
3012 {
3013 __be32 *p;
3014
3015 if (nfserr)
3016 return nfserr;
3017
3018 RESERVE_SPACE(24);
3019 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3020 WRITE32(sess->seqid);
3021 WRITE32(sess->flags);
3022 ADJUST_ARGS();
3023
3024 RESERVE_SPACE(28);
3025 WRITE32(0); /* headerpadsz */
3026 WRITE32(sess->fore_channel.maxreq_sz);
3027 WRITE32(sess->fore_channel.maxresp_sz);
3028 WRITE32(sess->fore_channel.maxresp_cached);
3029 WRITE32(sess->fore_channel.maxops);
3030 WRITE32(sess->fore_channel.maxreqs);
3031 WRITE32(sess->fore_channel.nr_rdma_attrs);
3032 ADJUST_ARGS();
3033
3034 if (sess->fore_channel.nr_rdma_attrs) {
3035 RESERVE_SPACE(4);
3036 WRITE32(sess->fore_channel.rdma_attrs);
3037 ADJUST_ARGS();
3038 }
3039
3040 RESERVE_SPACE(28);
3041 WRITE32(0); /* headerpadsz */
3042 WRITE32(sess->back_channel.maxreq_sz);
3043 WRITE32(sess->back_channel.maxresp_sz);
3044 WRITE32(sess->back_channel.maxresp_cached);
3045 WRITE32(sess->back_channel.maxops);
3046 WRITE32(sess->back_channel.maxreqs);
3047 WRITE32(sess->back_channel.nr_rdma_attrs);
3048 ADJUST_ARGS();
3049
3050 if (sess->back_channel.nr_rdma_attrs) {
3051 RESERVE_SPACE(4);
3052 WRITE32(sess->back_channel.rdma_attrs);
3053 ADJUST_ARGS();
3054 }
3055 return 0;
3056 }
3057
3058 static __be32
3059 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3060 struct nfsd4_destroy_session *destroy_session)
3061 {
3062 return nfserr;
3063 }
3064
3065 __be32
3066 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3067 struct nfsd4_sequence *seq)
3068 {
3069 __be32 *p;
3070
3071 if (nfserr)
3072 return nfserr;
3073
3074 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3075 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3076 WRITE32(seq->seqid);
3077 WRITE32(seq->slotid);
3078 WRITE32(seq->maxslots);
3079 /*
3080 * FIXME: for now:
3081 * target_maxslots = maxslots
3082 * status_flags = 0
3083 */
3084 WRITE32(seq->maxslots);
3085 WRITE32(0);
3086
3087 ADJUST_ARGS();
3088 resp->cstate.datap = p; /* DRC cache data pointer */
3089 return 0;
3090 }
3091
3092 static __be32
3093 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3094 {
3095 return nfserr;
3096 }
3097
3098 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3099
3100 /*
3101 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3102 * since we don't need to filter out obsolete ops as this is
3103 * done in the decoding phase.
3104 */
3105 static nfsd4_enc nfsd4_enc_ops[] = {
3106 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3107 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3108 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3109 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3110 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3111 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3112 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3113 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3114 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3115 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3116 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3117 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3118 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3119 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3120 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3121 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3122 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3123 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3124 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3125 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3126 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3127 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3128 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3129 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3130 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3131 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3132 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3133 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3134 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3135 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3136 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3137 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3138 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3139 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3140 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3141 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3142 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3143
3144 /* NFSv4.1 operations */
3145 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3146 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3147 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3148 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3149 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3150 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3151 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3152 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3153 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3154 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3155 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3156 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3157 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
3158 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3159 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3160 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3161 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3162 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3163 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3164 };
3165
3166 /*
3167 * Calculate the total amount of memory that the compound response has taken
3168 * after encoding the current operation.
3169 *
3170 * pad: add on 8 bytes for the next operation's op_code and status so that
3171 * there is room to cache a failure on the next operation.
3172 *
3173 * Compare this length to the session se_fmaxresp_cached.
3174 *
3175 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3176 * will be at least a page and will therefore hold the xdr_buf head.
3177 */
3178 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3179 {
3180 int status = 0;
3181 struct xdr_buf *xb = &resp->rqstp->rq_res;
3182 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3183 struct nfsd4_session *session = NULL;
3184 struct nfsd4_slot *slot = resp->cstate.slot;
3185 u32 length, tlen = 0, pad = 8;
3186
3187 if (!nfsd4_has_session(&resp->cstate))
3188 return status;
3189
3190 session = resp->cstate.session;
3191 if (session == NULL || slot->sl_cachethis == 0)
3192 return status;
3193
3194 if (resp->opcnt >= args->opcnt)
3195 pad = 0; /* this is the last operation */
3196
3197 if (xb->page_len == 0) {
3198 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3199 } else {
3200 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3201 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3202
3203 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3204 }
3205 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3206 length, xb->page_len, tlen, pad);
3207
3208 if (length <= session->se_fchannel.maxresp_cached)
3209 return status;
3210 else
3211 return nfserr_rep_too_big_to_cache;
3212 }
3213
3214 void
3215 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3216 {
3217 __be32 *statp;
3218 __be32 *p;
3219
3220 RESERVE_SPACE(8);
3221 WRITE32(op->opnum);
3222 statp = p++; /* to be backfilled at the end */
3223 ADJUST_ARGS();
3224
3225 if (op->opnum == OP_ILLEGAL)
3226 goto status;
3227 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3228 !nfsd4_enc_ops[op->opnum]);
3229 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3230 /* nfsd4_check_drc_limit guarantees enough room for error status */
3231 if (!op->status && nfsd4_check_drc_limit(resp))
3232 op->status = nfserr_rep_too_big_to_cache;
3233 status:
3234 /*
3235 * Note: We write the status directly, instead of using WRITE32(),
3236 * since it is already in network byte order.
3237 */
3238 *statp = op->status;
3239 }
3240
3241 /*
3242 * Encode the reply stored in the stateowner reply cache
3243 *
3244 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3245 * previously sent already encoded operation.
3246 *
3247 * called with nfs4_lock_state() held
3248 */
3249 void
3250 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3251 {
3252 __be32 *p;
3253 struct nfs4_replay *rp = op->replay;
3254
3255 BUG_ON(!rp);
3256
3257 RESERVE_SPACE(8);
3258 WRITE32(op->opnum);
3259 *p++ = rp->rp_status; /* already xdr'ed */
3260 ADJUST_ARGS();
3261
3262 RESERVE_SPACE(rp->rp_buflen);
3263 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3264 ADJUST_ARGS();
3265 }
3266
3267 int
3268 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3269 {
3270 return xdr_ressize_check(rqstp, p);
3271 }
3272
3273 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3274 {
3275 if (args->ops != args->iops) {
3276 kfree(args->ops);
3277 args->ops = args->iops;
3278 }
3279 kfree(args->tmpp);
3280 args->tmpp = NULL;
3281 while (args->to_free) {
3282 struct tmpbuf *tb = args->to_free;
3283 args->to_free = tb->next;
3284 tb->release(tb->buf);
3285 kfree(tb);
3286 }
3287 }
3288
3289 int
3290 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3291 {
3292 __be32 status;
3293
3294 args->p = p;
3295 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3296 args->pagelist = rqstp->rq_arg.pages;
3297 args->pagelen = rqstp->rq_arg.page_len;
3298 args->tmpp = NULL;
3299 args->to_free = NULL;
3300 args->ops = args->iops;
3301 args->rqstp = rqstp;
3302
3303 status = nfsd4_decode_compound(args);
3304 if (status) {
3305 nfsd4_release_compoundargs(args);
3306 }
3307 return !status;
3308 }
3309
3310 int
3311 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3312 {
3313 /*
3314 * All that remains is to write the tag and operation count...
3315 */
3316 struct nfsd4_compound_state *cs = &resp->cstate;
3317 struct kvec *iov;
3318 p = resp->tagp;
3319 *p++ = htonl(resp->taglen);
3320 memcpy(p, resp->tag, resp->taglen);
3321 p += XDR_QUADLEN(resp->taglen);
3322 *p++ = htonl(resp->opcnt);
3323
3324 if (rqstp->rq_res.page_len)
3325 iov = &rqstp->rq_res.tail[0];
3326 else
3327 iov = &rqstp->rq_res.head[0];
3328 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3329 BUG_ON(iov->iov_len > PAGE_SIZE);
3330 if (nfsd4_has_session(cs)) {
3331 if (cs->status != nfserr_replay_cache) {
3332 nfsd4_store_cache_entry(resp);
3333 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3334 cs->slot->sl_inuse = false;
3335 }
3336 /* Renew the clientid on success and on replay */
3337 release_session_client(cs->session);
3338 nfsd4_put_session(cs->session);
3339 }
3340 return 1;
3341 }
3342
3343 /*
3344 * Local variables:
3345 * c-basic-offset: 8
3346 * End:
3347 */
linux-next