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ARM: cpu topology: Add debugfs interface for cpu_power
[cmplus.git] / fs / nfsd / nfs4xdr.c
blob6c740974bfe0c0042235f88aa92434d193edb48d
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/sunrpc/svcauth_gss.h>
48
49 #include "idmap.h"
50 #include "acl.h"
51 #include "xdr4.h"
52 #include "vfs.h"
53
54
55 #define NFSDDBG_FACILITY NFSDDBG_XDR
56
57 /*
58 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
59 * directory in order to indicate to the client that a filesystem boundary is present
60 * We use a fixed fsid for a referral
61 */
62 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
63 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
64
65 static __be32
66 check_filename(char *str, int len, __be32 err)
67 {
68 int i;
69
70 if (len == 0)
71 return nfserr_inval;
72 if (isdotent(str, len))
73 return err;
74 for (i = 0; i < len; i++)
75 if (str[i] == '/')
76 return err;
77 return 0;
78 }
79
80 #define DECODE_HEAD \
81 __be32 *p; \
82 __be32 status
83 #define DECODE_TAIL \
84 status = 0; \
85 out: \
86 return status; \
87 xdr_error: \
88 dprintk("NFSD: xdr error (%s:%d)\n", \
89 __FILE__, __LINE__); \
90 status = nfserr_bad_xdr; \
91 goto out
92
93 #define READ32(x) (x) = ntohl(*p++)
94 #define READ64(x) do { \
95 (x) = (u64)ntohl(*p++) << 32; \
96 (x) |= ntohl(*p++); \
97 } while (0)
98 #define READTIME(x) do { \
99 p++; \
100 (x) = ntohl(*p++); \
101 p++; \
102 } while (0)
103 #define READMEM(x,nbytes) do { \
104 x = (char *)p; \
105 p += XDR_QUADLEN(nbytes); \
106 } while (0)
107 #define SAVEMEM(x,nbytes) do { \
108 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
109 savemem(argp, p, nbytes) : \
110 (char *)p)) { \
111 dprintk("NFSD: xdr error (%s:%d)\n", \
112 __FILE__, __LINE__); \
113 goto xdr_error; \
114 } \
115 p += XDR_QUADLEN(nbytes); \
116 } while (0)
117 #define COPYMEM(x,nbytes) do { \
118 memcpy((x), p, nbytes); \
119 p += XDR_QUADLEN(nbytes); \
120 } while (0)
121
122 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
123 #define READ_BUF(nbytes) do { \
124 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
125 p = argp->p; \
126 argp->p += XDR_QUADLEN(nbytes); \
127 } else if (!(p = read_buf(argp, nbytes))) { \
128 dprintk("NFSD: xdr error (%s:%d)\n", \
129 __FILE__, __LINE__); \
130 goto xdr_error; \
131 } \
132 } while (0)
133
134 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
135 {
136 /* We want more bytes than seem to be available.
137 * Maybe we need a new page, maybe we have just run out
138 */
139 unsigned int avail = (char *)argp->end - (char *)argp->p;
140 __be32 *p;
141 if (avail + argp->pagelen < nbytes)
142 return NULL;
143 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
144 return NULL;
145 /* ok, we can do it with the current plus the next page */
146 if (nbytes <= sizeof(argp->tmp))
147 p = argp->tmp;
148 else {
149 kfree(argp->tmpp);
150 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
151 if (!p)
152 return NULL;
153
154 }
155 /*
156 * The following memcpy is safe because read_buf is always
157 * called with nbytes > avail, and the two cases above both
158 * guarantee p points to at least nbytes bytes.
159 */
160 memcpy(p, argp->p, avail);
161 /* step to next page */
162 argp->p = page_address(argp->pagelist[0]);
163 argp->pagelist++;
164 if (argp->pagelen < PAGE_SIZE) {
165 argp->end = argp->p + (argp->pagelen>>2);
166 argp->pagelen = 0;
167 } else {
168 argp->end = argp->p + (PAGE_SIZE>>2);
169 argp->pagelen -= PAGE_SIZE;
170 }
171 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
172 argp->p += XDR_QUADLEN(nbytes - avail);
173 return p;
174 }
175
176 static int zero_clientid(clientid_t *clid)
177 {
178 return (clid->cl_boot == 0) && (clid->cl_id == 0);
179 }
180
181 static int
182 defer_free(struct nfsd4_compoundargs *argp,
183 void (*release)(const void *), void *p)
184 {
185 struct tmpbuf *tb;
186
187 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
188 if (!tb)
189 return -ENOMEM;
190 tb->buf = p;
191 tb->release = release;
192 tb->next = argp->to_free;
193 argp->to_free = tb;
194 return 0;
195 }
196
197 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
198 {
199 if (p == argp->tmp) {
200 p = kmalloc(nbytes, GFP_KERNEL);
201 if (!p)
202 return NULL;
203 memcpy(p, argp->tmp, nbytes);
204 } else {
205 BUG_ON(p != argp->tmpp);
206 argp->tmpp = NULL;
207 }
208 if (defer_free(argp, kfree, p)) {
209 kfree(p);
210 return NULL;
211 } else
212 return (char *)p;
213 }
214
215 static __be32
216 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
217 {
218 u32 bmlen;
219 DECODE_HEAD;
220
221 bmval[0] = 0;
222 bmval[1] = 0;
223 bmval[2] = 0;
224
225 READ_BUF(4);
226 READ32(bmlen);
227 if (bmlen > 1000)
228 goto xdr_error;
229
230 READ_BUF(bmlen << 2);
231 if (bmlen > 0)
232 READ32(bmval[0]);
233 if (bmlen > 1)
234 READ32(bmval[1]);
235 if (bmlen > 2)
236 READ32(bmval[2]);
237
238 DECODE_TAIL;
239 }
240
241 static __be32
242 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
243 struct iattr *iattr, struct nfs4_acl **acl)
244 {
245 int expected_len, len = 0;
246 u32 dummy32;
247 char *buf;
248 int host_err;
249
250 DECODE_HEAD;
251 iattr->ia_valid = 0;
252 if ((status = nfsd4_decode_bitmap(argp, bmval)))
253 return status;
254
255 READ_BUF(4);
256 READ32(expected_len);
257
258 if (bmval[0] & FATTR4_WORD0_SIZE) {
259 READ_BUF(8);
260 len += 8;
261 READ64(iattr->ia_size);
262 iattr->ia_valid |= ATTR_SIZE;
263 }
264 if (bmval[0] & FATTR4_WORD0_ACL) {
265 int nace;
266 struct nfs4_ace *ace;
267
268 READ_BUF(4); len += 4;
269 READ32(nace);
270
271 if (nace > NFS4_ACL_MAX)
272 return nfserr_resource;
273
274 *acl = nfs4_acl_new(nace);
275 if (*acl == NULL) {
276 host_err = -ENOMEM;
277 goto out_nfserr;
278 }
279 defer_free(argp, kfree, *acl);
280
281 (*acl)->naces = nace;
282 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
283 READ_BUF(16); len += 16;
284 READ32(ace->type);
285 READ32(ace->flag);
286 READ32(ace->access_mask);
287 READ32(dummy32);
288 READ_BUF(dummy32);
289 len += XDR_QUADLEN(dummy32) << 2;
290 READMEM(buf, dummy32);
291 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
292 status = nfs_ok;
293 if (ace->whotype != NFS4_ACL_WHO_NAMED)
294 ace->who = 0;
295 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
296 status = nfsd_map_name_to_gid(argp->rqstp,
297 buf, dummy32, &ace->who);
298 else
299 status = nfsd_map_name_to_uid(argp->rqstp,
300 buf, dummy32, &ace->who);
301 if (status)
302 return status;
303 }
304 } else
305 *acl = NULL;
306 if (bmval[1] & FATTR4_WORD1_MODE) {
307 READ_BUF(4);
308 len += 4;
309 READ32(iattr->ia_mode);
310 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
311 iattr->ia_valid |= ATTR_MODE;
312 }
313 if (bmval[1] & FATTR4_WORD1_OWNER) {
314 READ_BUF(4);
315 len += 4;
316 READ32(dummy32);
317 READ_BUF(dummy32);
318 len += (XDR_QUADLEN(dummy32) << 2);
319 READMEM(buf, dummy32);
320 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
321 return status;
322 iattr->ia_valid |= ATTR_UID;
323 }
324 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
325 READ_BUF(4);
326 len += 4;
327 READ32(dummy32);
328 READ_BUF(dummy32);
329 len += (XDR_QUADLEN(dummy32) << 2);
330 READMEM(buf, dummy32);
331 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
332 return status;
333 iattr->ia_valid |= ATTR_GID;
334 }
335 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
336 READ_BUF(4);
337 len += 4;
338 READ32(dummy32);
339 switch (dummy32) {
340 case NFS4_SET_TO_CLIENT_TIME:
341 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
342 all 32 bits of 'nseconds'. */
343 READ_BUF(12);
344 len += 12;
345 READ32(dummy32);
346 if (dummy32)
347 return nfserr_inval;
348 READ32(iattr->ia_atime.tv_sec);
349 READ32(iattr->ia_atime.tv_nsec);
350 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
351 return nfserr_inval;
352 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
353 break;
354 case NFS4_SET_TO_SERVER_TIME:
355 iattr->ia_valid |= ATTR_ATIME;
356 break;
357 default:
358 goto xdr_error;
359 }
360 }
361 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
362 READ_BUF(4);
363 len += 4;
364 READ32(dummy32);
365 switch (dummy32) {
366 case NFS4_SET_TO_CLIENT_TIME:
367 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
368 all 32 bits of 'nseconds'. */
369 READ_BUF(12);
370 len += 12;
371 READ32(dummy32);
372 if (dummy32)
373 return nfserr_inval;
374 READ32(iattr->ia_mtime.tv_sec);
375 READ32(iattr->ia_mtime.tv_nsec);
376 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
377 return nfserr_inval;
378 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
379 break;
380 case NFS4_SET_TO_SERVER_TIME:
381 iattr->ia_valid |= ATTR_MTIME;
382 break;
383 default:
384 goto xdr_error;
385 }
386 }
387 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
388 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
389 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
390 READ_BUF(expected_len - len);
391 else if (len != expected_len)
392 goto xdr_error;
393
394 DECODE_TAIL;
395
396 out_nfserr:
397 status = nfserrno(host_err);
398 goto out;
399 }
400
401 static __be32
402 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
403 {
404 DECODE_HEAD;
405
406 READ_BUF(sizeof(stateid_t));
407 READ32(sid->si_generation);
408 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
409
410 DECODE_TAIL;
411 }
412
413 static __be32
414 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
415 {
416 DECODE_HEAD;
417
418 READ_BUF(4);
419 READ32(access->ac_req_access);
420
421 DECODE_TAIL;
422 }
423
424 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
425 {
426 DECODE_HEAD;
427
428 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
429 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
430 READ32(bcts->dir);
431 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
432 * could help us figure out we should be using it. */
433 DECODE_TAIL;
434 }
435
436 static __be32
437 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
438 {
439 DECODE_HEAD;
440
441 close->cl_stateowner = NULL;
442 READ_BUF(4);
443 READ32(close->cl_seqid);
444 return nfsd4_decode_stateid(argp, &close->cl_stateid);
445
446 DECODE_TAIL;
447 }
448
449
450 static __be32
451 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
452 {
453 DECODE_HEAD;
454
455 READ_BUF(12);
456 READ64(commit->co_offset);
457 READ32(commit->co_count);
458
459 DECODE_TAIL;
460 }
461
462 static __be32
463 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
464 {
465 DECODE_HEAD;
466
467 READ_BUF(4);
468 READ32(create->cr_type);
469 switch (create->cr_type) {
470 case NF4LNK:
471 READ_BUF(4);
472 READ32(create->cr_linklen);
473 READ_BUF(create->cr_linklen);
474 SAVEMEM(create->cr_linkname, create->cr_linklen);
475 break;
476 case NF4BLK:
477 case NF4CHR:
478 READ_BUF(8);
479 READ32(create->cr_specdata1);
480 READ32(create->cr_specdata2);
481 break;
482 case NF4SOCK:
483 case NF4FIFO:
484 case NF4DIR:
485 default:
486 break;
487 }
488
489 READ_BUF(4);
490 READ32(create->cr_namelen);
491 READ_BUF(create->cr_namelen);
492 SAVEMEM(create->cr_name, create->cr_namelen);
493 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
494 return status;
495
496 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
497 &create->cr_acl);
498 if (status)
499 goto out;
500
501 DECODE_TAIL;
502 }
503
504 static inline __be32
505 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
506 {
507 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
508 }
509
510 static inline __be32
511 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
512 {
513 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
514 }
515
516 static __be32
517 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
518 {
519 DECODE_HEAD;
520
521 READ_BUF(4);
522 READ32(link->li_namelen);
523 READ_BUF(link->li_namelen);
524 SAVEMEM(link->li_name, link->li_namelen);
525 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
526 return status;
527
528 DECODE_TAIL;
529 }
530
531 static __be32
532 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
533 {
534 DECODE_HEAD;
535
536 lock->lk_replay_owner = NULL;
537 /*
538 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
539 */
540 READ_BUF(28);
541 READ32(lock->lk_type);
542 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
543 goto xdr_error;
544 READ32(lock->lk_reclaim);
545 READ64(lock->lk_offset);
546 READ64(lock->lk_length);
547 READ32(lock->lk_is_new);
548
549 if (lock->lk_is_new) {
550 READ_BUF(4);
551 READ32(lock->lk_new_open_seqid);
552 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
553 if (status)
554 return status;
555 READ_BUF(8 + sizeof(clientid_t));
556 READ32(lock->lk_new_lock_seqid);
557 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
558 READ32(lock->lk_new_owner.len);
559 READ_BUF(lock->lk_new_owner.len);
560 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
561 } else {
562 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
563 if (status)
564 return status;
565 READ_BUF(4);
566 READ32(lock->lk_old_lock_seqid);
567 }
568
569 DECODE_TAIL;
570 }
571
572 static __be32
573 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
574 {
575 DECODE_HEAD;
576
577 READ_BUF(32);
578 READ32(lockt->lt_type);
579 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
580 goto xdr_error;
581 READ64(lockt->lt_offset);
582 READ64(lockt->lt_length);
583 COPYMEM(&lockt->lt_clientid, 8);
584 READ32(lockt->lt_owner.len);
585 READ_BUF(lockt->lt_owner.len);
586 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
587
588 DECODE_TAIL;
589 }
590
591 static __be32
592 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
593 {
594 DECODE_HEAD;
595
596 locku->lu_stateowner = NULL;
597 READ_BUF(8);
598 READ32(locku->lu_type);
599 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
600 goto xdr_error;
601 READ32(locku->lu_seqid);
602 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
603 if (status)
604 return status;
605 READ_BUF(16);
606 READ64(locku->lu_offset);
607 READ64(locku->lu_length);
608
609 DECODE_TAIL;
610 }
611
612 static __be32
613 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
614 {
615 DECODE_HEAD;
616
617 READ_BUF(4);
618 READ32(lookup->lo_len);
619 READ_BUF(lookup->lo_len);
620 SAVEMEM(lookup->lo_name, lookup->lo_len);
621 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
622 return status;
623
624 DECODE_TAIL;
625 }
626
627 static __be32
628 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
629 {
630 DECODE_HEAD;
631
632 memset(open->op_bmval, 0, sizeof(open->op_bmval));
633 open->op_iattr.ia_valid = 0;
634 open->op_stateowner = NULL;
635
636 /* seqid, share_access, share_deny, clientid, ownerlen */
637 READ_BUF(16 + sizeof(clientid_t));
638 READ32(open->op_seqid);
639 READ32(open->op_share_access);
640 READ32(open->op_share_deny);
641 COPYMEM(&open->op_clientid, sizeof(clientid_t));
642 READ32(open->op_owner.len);
643
644 /* owner, open_flag */
645 READ_BUF(open->op_owner.len + 4);
646 SAVEMEM(open->op_owner.data, open->op_owner.len);
647 READ32(open->op_create);
648 switch (open->op_create) {
649 case NFS4_OPEN_NOCREATE:
650 break;
651 case NFS4_OPEN_CREATE:
652 READ_BUF(4);
653 READ32(open->op_createmode);
654 switch (open->op_createmode) {
655 case NFS4_CREATE_UNCHECKED:
656 case NFS4_CREATE_GUARDED:
657 status = nfsd4_decode_fattr(argp, open->op_bmval,
658 &open->op_iattr, &open->op_acl);
659 if (status)
660 goto out;
661 break;
662 case NFS4_CREATE_EXCLUSIVE:
663 READ_BUF(8);
664 COPYMEM(open->op_verf.data, 8);
665 break;
666 case NFS4_CREATE_EXCLUSIVE4_1:
667 if (argp->minorversion < 1)
668 goto xdr_error;
669 READ_BUF(8);
670 COPYMEM(open->op_verf.data, 8);
671 status = nfsd4_decode_fattr(argp, open->op_bmval,
672 &open->op_iattr, &open->op_acl);
673 if (status)
674 goto out;
675 break;
676 default:
677 goto xdr_error;
678 }
679 break;
680 default:
681 goto xdr_error;
682 }
683
684 /* open_claim */
685 READ_BUF(4);
686 READ32(open->op_claim_type);
687 switch (open->op_claim_type) {
688 case NFS4_OPEN_CLAIM_NULL:
689 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
690 READ_BUF(4);
691 READ32(open->op_fname.len);
692 READ_BUF(open->op_fname.len);
693 SAVEMEM(open->op_fname.data, open->op_fname.len);
694 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
695 return status;
696 break;
697 case NFS4_OPEN_CLAIM_PREVIOUS:
698 READ_BUF(4);
699 READ32(open->op_delegate_type);
700 break;
701 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
702 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
703 if (status)
704 return status;
705 READ_BUF(4);
706 READ32(open->op_fname.len);
707 READ_BUF(open->op_fname.len);
708 SAVEMEM(open->op_fname.data, open->op_fname.len);
709 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
710 return status;
711 break;
712 default:
713 goto xdr_error;
714 }
715
716 DECODE_TAIL;
717 }
718
719 static __be32
720 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
721 {
722 DECODE_HEAD;
723
724 open_conf->oc_stateowner = NULL;
725 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
726 if (status)
727 return status;
728 READ_BUF(4);
729 READ32(open_conf->oc_seqid);
730
731 DECODE_TAIL;
732 }
733
734 static __be32
735 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
736 {
737 DECODE_HEAD;
738
739 open_down->od_stateowner = NULL;
740 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
741 if (status)
742 return status;
743 READ_BUF(12);
744 READ32(open_down->od_seqid);
745 READ32(open_down->od_share_access);
746 READ32(open_down->od_share_deny);
747
748 DECODE_TAIL;
749 }
750
751 static __be32
752 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
753 {
754 DECODE_HEAD;
755
756 READ_BUF(4);
757 READ32(putfh->pf_fhlen);
758 if (putfh->pf_fhlen > NFS4_FHSIZE)
759 goto xdr_error;
760 READ_BUF(putfh->pf_fhlen);
761 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
762
763 DECODE_TAIL;
764 }
765
766 static __be32
767 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
768 {
769 DECODE_HEAD;
770
771 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
772 if (status)
773 return status;
774 READ_BUF(12);
775 READ64(read->rd_offset);
776 READ32(read->rd_length);
777
778 DECODE_TAIL;
779 }
780
781 static __be32
782 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
783 {
784 DECODE_HEAD;
785
786 READ_BUF(24);
787 READ64(readdir->rd_cookie);
788 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
789 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
790 READ32(readdir->rd_maxcount);
791 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
792 goto out;
793
794 DECODE_TAIL;
795 }
796
797 static __be32
798 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
799 {
800 DECODE_HEAD;
801
802 READ_BUF(4);
803 READ32(remove->rm_namelen);
804 READ_BUF(remove->rm_namelen);
805 SAVEMEM(remove->rm_name, remove->rm_namelen);
806 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
807 return status;
808
809 DECODE_TAIL;
810 }
811
812 static __be32
813 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
814 {
815 DECODE_HEAD;
816
817 READ_BUF(4);
818 READ32(rename->rn_snamelen);
819 READ_BUF(rename->rn_snamelen + 4);
820 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
821 READ32(rename->rn_tnamelen);
822 READ_BUF(rename->rn_tnamelen);
823 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
824 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
825 return status;
826 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
827 return status;
828
829 DECODE_TAIL;
830 }
831
832 static __be32
833 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
834 {
835 DECODE_HEAD;
836
837 READ_BUF(sizeof(clientid_t));
838 COPYMEM(clientid, sizeof(clientid_t));
839
840 DECODE_TAIL;
841 }
842
843 static __be32
844 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
845 struct nfsd4_secinfo *secinfo)
846 {
847 DECODE_HEAD;
848
849 READ_BUF(4);
850 READ32(secinfo->si_namelen);
851 READ_BUF(secinfo->si_namelen);
852 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
853 status = check_filename(secinfo->si_name, secinfo->si_namelen,
854 nfserr_noent);
855 if (status)
856 return status;
857 DECODE_TAIL;
858 }
859
860 static __be32
861 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
862 struct nfsd4_secinfo_no_name *sin)
863 {
864 DECODE_HEAD;
865
866 READ_BUF(4);
867 READ32(sin->sin_style);
868 DECODE_TAIL;
869 }
870
871 static __be32
872 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
873 {
874 __be32 status;
875
876 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
877 if (status)
878 return status;
879 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
880 &setattr->sa_acl);
881 }
882
883 static __be32
884 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
885 {
886 DECODE_HEAD;
887
888 READ_BUF(12);
889 COPYMEM(setclientid->se_verf.data, 8);
890 READ32(setclientid->se_namelen);
891
892 READ_BUF(setclientid->se_namelen + 8);
893 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
894 READ32(setclientid->se_callback_prog);
895 READ32(setclientid->se_callback_netid_len);
896
897 READ_BUF(setclientid->se_callback_netid_len + 4);
898 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
899 READ32(setclientid->se_callback_addr_len);
900
901 READ_BUF(setclientid->se_callback_addr_len + 4);
902 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
903 READ32(setclientid->se_callback_ident);
904
905 DECODE_TAIL;
906 }
907
908 static __be32
909 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
910 {
911 DECODE_HEAD;
912
913 READ_BUF(8 + sizeof(nfs4_verifier));
914 COPYMEM(&scd_c->sc_clientid, 8);
915 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
916
917 DECODE_TAIL;
918 }
919
920 /* Also used for NVERIFY */
921 static __be32
922 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
923 {
924 #if 0
925 struct nfsd4_compoundargs save = {
926 .p = argp->p,
927 .end = argp->end,
928 .rqstp = argp->rqstp,
929 };
930 u32 ve_bmval[2];
931 struct iattr ve_iattr; /* request */
932 struct nfs4_acl *ve_acl; /* request */
933 #endif
934 DECODE_HEAD;
935
936 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
937 goto out;
938
939 /* For convenience's sake, we compare raw xdr'd attributes in
940 * nfsd4_proc_verify; however we still decode here just to return
941 * correct error in case of bad xdr. */
942 #if 0
943 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
944 if (status == nfserr_inval) {
945 status = nfserrno(status);
946 goto out;
947 }
948 #endif
949 READ_BUF(4);
950 READ32(verify->ve_attrlen);
951 READ_BUF(verify->ve_attrlen);
952 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
953
954 DECODE_TAIL;
955 }
956
957 static __be32
958 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
959 {
960 int avail;
961 int v;
962 int len;
963 DECODE_HEAD;
964
965 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
966 if (status)
967 return status;
968 READ_BUF(16);
969 READ64(write->wr_offset);
970 READ32(write->wr_stable_how);
971 if (write->wr_stable_how > 2)
972 goto xdr_error;
973 READ32(write->wr_buflen);
974
975 /* Sorry .. no magic macros for this.. *
976 * READ_BUF(write->wr_buflen);
977 * SAVEMEM(write->wr_buf, write->wr_buflen);
978 */
979 avail = (char*)argp->end - (char*)argp->p;
980 if (avail + argp->pagelen < write->wr_buflen) {
981 dprintk("NFSD: xdr error (%s:%d)\n",
982 __FILE__, __LINE__);
983 goto xdr_error;
984 }
985 argp->rqstp->rq_vec[0].iov_base = p;
986 argp->rqstp->rq_vec[0].iov_len = avail;
987 v = 0;
988 len = write->wr_buflen;
989 while (len > argp->rqstp->rq_vec[v].iov_len) {
990 len -= argp->rqstp->rq_vec[v].iov_len;
991 v++;
992 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
993 argp->pagelist++;
994 if (argp->pagelen >= PAGE_SIZE) {
995 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
996 argp->pagelen -= PAGE_SIZE;
997 } else {
998 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
999 argp->pagelen -= len;
1000 }
1001 }
1002 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
1003 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
1004 argp->rqstp->rq_vec[v].iov_len = len;
1005 write->wr_vlen = v+1;
1006
1007 DECODE_TAIL;
1008 }
1009
1010 static __be32
1011 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1012 {
1013 DECODE_HEAD;
1014
1015 READ_BUF(12);
1016 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1017 READ32(rlockowner->rl_owner.len);
1018 READ_BUF(rlockowner->rl_owner.len);
1019 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1020
1021 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1022 return nfserr_inval;
1023 DECODE_TAIL;
1024 }
1025
1026 static __be32
1027 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1028 struct nfsd4_exchange_id *exid)
1029 {
1030 int dummy, tmp;
1031 DECODE_HEAD;
1032
1033 READ_BUF(NFS4_VERIFIER_SIZE);
1034 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1035
1036 READ_BUF(4);
1037 READ32(exid->clname.len);
1038
1039 READ_BUF(exid->clname.len);
1040 SAVEMEM(exid->clname.data, exid->clname.len);
1041
1042 READ_BUF(4);
1043 READ32(exid->flags);
1044
1045 /* Ignore state_protect4_a */
1046 READ_BUF(4);
1047 READ32(exid->spa_how);
1048 switch (exid->spa_how) {
1049 case SP4_NONE:
1050 break;
1051 case SP4_MACH_CRED:
1052 /* spo_must_enforce */
1053 READ_BUF(4);
1054 READ32(dummy);
1055 READ_BUF(dummy * 4);
1056 p += dummy;
1057
1058 /* spo_must_allow */
1059 READ_BUF(4);
1060 READ32(dummy);
1061 READ_BUF(dummy * 4);
1062 p += dummy;
1063 break;
1064 case SP4_SSV:
1065 /* ssp_ops */
1066 READ_BUF(4);
1067 READ32(dummy);
1068 READ_BUF(dummy * 4);
1069 p += dummy;
1070
1071 READ_BUF(4);
1072 READ32(dummy);
1073 READ_BUF(dummy * 4);
1074 p += dummy;
1075
1076 /* ssp_hash_algs<> */
1077 READ_BUF(4);
1078 READ32(tmp);
1079 while (tmp--) {
1080 READ_BUF(4);
1081 READ32(dummy);
1082 READ_BUF(dummy);
1083 p += XDR_QUADLEN(dummy);
1084 }
1085
1086 /* ssp_encr_algs<> */
1087 READ_BUF(4);
1088 READ32(tmp);
1089 while (tmp--) {
1090 READ_BUF(4);
1091 READ32(dummy);
1092 READ_BUF(dummy);
1093 p += XDR_QUADLEN(dummy);
1094 }
1095
1096 /* ssp_window and ssp_num_gss_handles */
1097 READ_BUF(8);
1098 READ32(dummy);
1099 READ32(dummy);
1100 break;
1101 default:
1102 goto xdr_error;
1103 }
1104
1105 /* Ignore Implementation ID */
1106 READ_BUF(4); /* nfs_impl_id4 array length */
1107 READ32(dummy);
1108
1109 if (dummy > 1)
1110 goto xdr_error;
1111
1112 if (dummy == 1) {
1113 /* nii_domain */
1114 READ_BUF(4);
1115 READ32(dummy);
1116 READ_BUF(dummy);
1117 p += XDR_QUADLEN(dummy);
1118
1119 /* nii_name */
1120 READ_BUF(4);
1121 READ32(dummy);
1122 READ_BUF(dummy);
1123 p += XDR_QUADLEN(dummy);
1124
1125 /* nii_date */
1126 READ_BUF(12);
1127 p += 3;
1128 }
1129 DECODE_TAIL;
1130 }
1131
1132 static __be32
1133 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1134 struct nfsd4_create_session *sess)
1135 {
1136 DECODE_HEAD;
1137
1138 u32 dummy;
1139 char *machine_name;
1140 int i;
1141 int nr_secflavs;
1142
1143 READ_BUF(16);
1144 COPYMEM(&sess->clientid, 8);
1145 READ32(sess->seqid);
1146 READ32(sess->flags);
1147
1148 /* Fore channel attrs */
1149 READ_BUF(28);
1150 READ32(dummy); /* headerpadsz is always 0 */
1151 READ32(sess->fore_channel.maxreq_sz);
1152 READ32(sess->fore_channel.maxresp_sz);
1153 READ32(sess->fore_channel.maxresp_cached);
1154 READ32(sess->fore_channel.maxops);
1155 READ32(sess->fore_channel.maxreqs);
1156 READ32(sess->fore_channel.nr_rdma_attrs);
1157 if (sess->fore_channel.nr_rdma_attrs == 1) {
1158 READ_BUF(4);
1159 READ32(sess->fore_channel.rdma_attrs);
1160 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1161 dprintk("Too many fore channel attr bitmaps!\n");
1162 goto xdr_error;
1163 }
1164
1165 /* Back channel attrs */
1166 READ_BUF(28);
1167 READ32(dummy); /* headerpadsz is always 0 */
1168 READ32(sess->back_channel.maxreq_sz);
1169 READ32(sess->back_channel.maxresp_sz);
1170 READ32(sess->back_channel.maxresp_cached);
1171 READ32(sess->back_channel.maxops);
1172 READ32(sess->back_channel.maxreqs);
1173 READ32(sess->back_channel.nr_rdma_attrs);
1174 if (sess->back_channel.nr_rdma_attrs == 1) {
1175 READ_BUF(4);
1176 READ32(sess->back_channel.rdma_attrs);
1177 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1178 dprintk("Too many back channel attr bitmaps!\n");
1179 goto xdr_error;
1180 }
1181
1182 READ_BUF(8);
1183 READ32(sess->callback_prog);
1184
1185 /* callback_sec_params4 */
1186 READ32(nr_secflavs);
1187 for (i = 0; i < nr_secflavs; ++i) {
1188 READ_BUF(4);
1189 READ32(dummy);
1190 switch (dummy) {
1191 case RPC_AUTH_NULL:
1192 /* Nothing to read */
1193 break;
1194 case RPC_AUTH_UNIX:
1195 READ_BUF(8);
1196 /* stamp */
1197 READ32(dummy);
1198
1199 /* machine name */
1200 READ32(dummy);
1201 READ_BUF(dummy);
1202 SAVEMEM(machine_name, dummy);
1203
1204 /* uid, gid */
1205 READ_BUF(8);
1206 READ32(sess->uid);
1207 READ32(sess->gid);
1208
1209 /* more gids */
1210 READ_BUF(4);
1211 READ32(dummy);
1212 READ_BUF(dummy * 4);
1213 break;
1214 case RPC_AUTH_GSS:
1215 dprintk("RPC_AUTH_GSS callback secflavor "
1216 "not supported!\n");
1217 READ_BUF(8);
1218 /* gcbp_service */
1219 READ32(dummy);
1220 /* gcbp_handle_from_server */
1221 READ32(dummy);
1222 READ_BUF(dummy);
1223 p += XDR_QUADLEN(dummy);
1224 /* gcbp_handle_from_client */
1225 READ_BUF(4);
1226 READ32(dummy);
1227 READ_BUF(dummy);
1228 break;
1229 default:
1230 dprintk("Illegal callback secflavor\n");
1231 return nfserr_inval;
1232 }
1233 }
1234 DECODE_TAIL;
1235 }
1236
1237 static __be32
1238 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1239 struct nfsd4_destroy_session *destroy_session)
1240 {
1241 DECODE_HEAD;
1242 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1243 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1244
1245 DECODE_TAIL;
1246 }
1247
1248 static __be32
1249 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1250 struct nfsd4_sequence *seq)
1251 {
1252 DECODE_HEAD;
1253
1254 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1255 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1256 READ32(seq->seqid);
1257 READ32(seq->slotid);
1258 READ32(seq->maxslots);
1259 READ32(seq->cachethis);
1260
1261 DECODE_TAIL;
1262 }
1263
1264 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1265 {
1266 DECODE_HEAD;
1267
1268 READ_BUF(4);
1269 READ32(rc->rca_one_fs);
1270
1271 DECODE_TAIL;
1272 }
1273
1274 static __be32
1275 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1276 {
1277 return nfs_ok;
1278 }
1279
1280 static __be32
1281 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1282 {
1283 return nfserr_notsupp;
1284 }
1285
1286 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1287
1288 static nfsd4_dec nfsd4_dec_ops[] = {
1289 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1290 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1291 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1292 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1293 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1294 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1295 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1296 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1297 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1298 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1299 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1300 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1301 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1302 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1303 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1304 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1305 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1306 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1307 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1308 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1309 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1310 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1311 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1312 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1313 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1314 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1315 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1316 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1317 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1318 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1319 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1320 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1321 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1322 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1323 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1324 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1325 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1326 };
1327
1328 static nfsd4_dec nfsd41_dec_ops[] = {
1329 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1330 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1331 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1332 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1333 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1334 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1335 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1336 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1337 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1338 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1339 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1340 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1341 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1342 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1343 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1344 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1345 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1346 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1347 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1348 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1349 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1350 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1351 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1352 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1353 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1354 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1355 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1356 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1357 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1358 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1359 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1360 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1361 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1362 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1363 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1364 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1365 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
1366
1367 /* new operations for NFSv4.1 */
1368 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1369 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1370 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1371 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1372 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1373 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1374 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1375 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1376 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1377 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1378 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1379 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1380 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1381 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1382 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1383 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1384 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1385 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1386 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1387 };
1388
1389 struct nfsd4_minorversion_ops {
1390 nfsd4_dec *decoders;
1391 int nops;
1392 };
1393
1394 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1395 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1396 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1397 };
1398
1399 static __be32
1400 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1401 {
1402 DECODE_HEAD;
1403 struct nfsd4_op *op;
1404 struct nfsd4_minorversion_ops *ops;
1405 int i;
1406
1407 /*
1408 * XXX: According to spec, we should check the tag
1409 * for UTF-8 compliance. I'm postponing this for
1410 * now because it seems that some clients do use
1411 * binary tags.
1412 */
1413 READ_BUF(4);
1414 READ32(argp->taglen);
1415 READ_BUF(argp->taglen + 8);
1416 SAVEMEM(argp->tag, argp->taglen);
1417 READ32(argp->minorversion);
1418 READ32(argp->opcnt);
1419
1420 if (argp->taglen > NFSD4_MAX_TAGLEN)
1421 goto xdr_error;
1422 if (argp->opcnt > 100)
1423 goto xdr_error;
1424
1425 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1426 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1427 if (!argp->ops) {
1428 argp->ops = argp->iops;
1429 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1430 goto xdr_error;
1431 }
1432 }
1433
1434 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1435 argp->opcnt = 0;
1436
1437 ops = &nfsd4_minorversion[argp->minorversion];
1438 for (i = 0; i < argp->opcnt; i++) {
1439 op = &argp->ops[i];
1440 op->replay = NULL;
1441
1442 /*
1443 * We can't use READ_BUF() here because we need to handle
1444 * a missing opcode as an OP_WRITE + 1. So we need to check
1445 * to see if we're truly at the end of our buffer or if there
1446 * is another page we need to flip to.
1447 */
1448
1449 if (argp->p == argp->end) {
1450 if (argp->pagelen < 4) {
1451 /* There isn't an opcode still on the wire */
1452 op->opnum = OP_WRITE + 1;
1453 op->status = nfserr_bad_xdr;
1454 argp->opcnt = i+1;
1455 break;
1456 }
1457
1458 /*
1459 * False alarm. We just hit a page boundary, but there
1460 * is still data available. Move pointer across page
1461 * boundary. *snip from READ_BUF*
1462 */
1463 argp->p = page_address(argp->pagelist[0]);
1464 argp->pagelist++;
1465 if (argp->pagelen < PAGE_SIZE) {
1466 argp->end = argp->p + (argp->pagelen>>2);
1467 argp->pagelen = 0;
1468 } else {
1469 argp->end = argp->p + (PAGE_SIZE>>2);
1470 argp->pagelen -= PAGE_SIZE;
1471 }
1472 }
1473 op->opnum = ntohl(*argp->p++);
1474
1475 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
1476 op->status = ops->decoders[op->opnum](argp, &op->u);
1477 else {
1478 op->opnum = OP_ILLEGAL;
1479 op->status = nfserr_op_illegal;
1480 }
1481
1482 if (op->status) {
1483 argp->opcnt = i+1;
1484 break;
1485 }
1486 }
1487
1488 DECODE_TAIL;
1489 }
1490
1491 #define WRITE32(n) *p++ = htonl(n)
1492 #define WRITE64(n) do { \
1493 *p++ = htonl((u32)((n) >> 32)); \
1494 *p++ = htonl((u32)(n)); \
1495 } while (0)
1496 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1497 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1498 memcpy(p, ptr, nbytes); \
1499 p += XDR_QUADLEN(nbytes); \
1500 }} while (0)
1501
1502 static void write32(__be32 **p, u32 n)
1503 {
1504 *(*p)++ = n;
1505 }
1506
1507 static void write64(__be32 **p, u64 n)
1508 {
1509 write32(p, (u32)(n >> 32));
1510 write32(p, (u32)n);
1511 }
1512
1513 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1514 {
1515 if (IS_I_VERSION(inode)) {
1516 write64(p, inode->i_version);
1517 } else {
1518 write32(p, stat->ctime.tv_sec);
1519 write32(p, stat->ctime.tv_nsec);
1520 }
1521 }
1522
1523 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1524 {
1525 write32(p, c->atomic);
1526 if (c->change_supported) {
1527 write64(p, c->before_change);
1528 write64(p, c->after_change);
1529 } else {
1530 write32(p, c->before_ctime_sec);
1531 write32(p, c->before_ctime_nsec);
1532 write32(p, c->after_ctime_sec);
1533 write32(p, c->after_ctime_nsec);
1534 }
1535 }
1536
1537 #define RESERVE_SPACE(nbytes) do { \
1538 p = resp->p; \
1539 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1540 } while (0)
1541 #define ADJUST_ARGS() resp->p = p
1542
1543 /*
1544 * Header routine to setup seqid operation replay cache
1545 */
1546 #define ENCODE_SEQID_OP_HEAD \
1547 __be32 *save; \
1548 \
1549 save = resp->p;
1550
1551 static bool seqid_mutating_err(__be32 err)
1552 {
1553 /* rfc 3530 section 8.1.5: */
1554 return err != nfserr_stale_clientid &&
1555 err != nfserr_stale_stateid &&
1556 err != nfserr_bad_stateid &&
1557 err != nfserr_bad_seqid &&
1558 err != nfserr_bad_xdr &&
1559 err != nfserr_resource &&
1560 err != nfserr_nofilehandle;
1561 }
1562
1563 /*
1564 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1565 * is where sequence id's are incremented, and the replay cache is filled.
1566 * Note that we increment sequence id's here, at the last moment, so we're sure
1567 * we know whether the error to be returned is a sequence id mutating error.
1568 */
1569
1570 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1571 if (seqid_mutating_err(nfserr) && stateowner) { \
1572 stateowner->so_seqid++; \
1573 stateowner->so_replay.rp_status = nfserr; \
1574 stateowner->so_replay.rp_buflen = \
1575 (((char *)(resp)->p - (char *)save)); \
1576 memcpy(stateowner->so_replay.rp_buf, save, \
1577 stateowner->so_replay.rp_buflen); \
1578 } } while (0);
1579
1580 /* Encode as an array of strings the string given with components
1581 * separated @sep.
1582 */
1583 static __be32 nfsd4_encode_components(char sep, char *components,
1584 __be32 **pp, int *buflen)
1585 {
1586 __be32 *p = *pp;
1587 __be32 *countp = p;
1588 int strlen, count=0;
1589 char *str, *end;
1590
1591 dprintk("nfsd4_encode_components(%s)\n", components);
1592 if ((*buflen -= 4) < 0)
1593 return nfserr_resource;
1594 WRITE32(0); /* We will fill this in with @count later */
1595 end = str = components;
1596 while (*end) {
1597 for (; *end && (*end != sep); end++)
1598 ; /* Point to end of component */
1599 strlen = end - str;
1600 if (strlen) {
1601 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1602 return nfserr_resource;
1603 WRITE32(strlen);
1604 WRITEMEM(str, strlen);
1605 count++;
1606 }
1607 else
1608 end++;
1609 str = end;
1610 }
1611 *pp = p;
1612 p = countp;
1613 WRITE32(count);
1614 return 0;
1615 }
1616
1617 /*
1618 * encode a location element of a fs_locations structure
1619 */
1620 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1621 __be32 **pp, int *buflen)
1622 {
1623 __be32 status;
1624 __be32 *p = *pp;
1625
1626 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1627 if (status)
1628 return status;
1629 status = nfsd4_encode_components('/', location->path, &p, buflen);
1630 if (status)
1631 return status;
1632 *pp = p;
1633 return 0;
1634 }
1635
1636 /*
1637 * Return the path to an export point in the pseudo filesystem namespace
1638 * Returned string is safe to use as long as the caller holds a reference
1639 * to @exp.
1640 */
1641 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1642 {
1643 struct svc_fh tmp_fh;
1644 char *path = NULL, *rootpath;
1645 size_t rootlen;
1646
1647 fh_init(&tmp_fh, NFS4_FHSIZE);
1648 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1649 if (*stat)
1650 return NULL;
1651 rootpath = tmp_fh.fh_export->ex_pathname;
1652
1653 path = exp->ex_pathname;
1654
1655 rootlen = strlen(rootpath);
1656 if (strncmp(path, rootpath, rootlen)) {
1657 dprintk("nfsd: fs_locations failed;"
1658 "%s is not contained in %s\n", path, rootpath);
1659 *stat = nfserr_notsupp;
1660 path = NULL;
1661 goto out;
1662 }
1663 path += rootlen;
1664 out:
1665 fh_put(&tmp_fh);
1666 return path;
1667 }
1668
1669 /*
1670 * encode a fs_locations structure
1671 */
1672 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1673 struct svc_export *exp,
1674 __be32 **pp, int *buflen)
1675 {
1676 __be32 status;
1677 int i;
1678 __be32 *p = *pp;
1679 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1680 char *root = nfsd4_path(rqstp, exp, &status);
1681
1682 if (status)
1683 return status;
1684 status = nfsd4_encode_components('/', root, &p, buflen);
1685 if (status)
1686 return status;
1687 if ((*buflen -= 4) < 0)
1688 return nfserr_resource;
1689 WRITE32(fslocs->locations_count);
1690 for (i=0; i<fslocs->locations_count; i++) {
1691 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1692 &p, buflen);
1693 if (status)
1694 return status;
1695 }
1696 *pp = p;
1697 return 0;
1698 }
1699
1700 static u32 nfs4_ftypes[16] = {
1701 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1702 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1703 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1704 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1705 };
1706
1707 static __be32
1708 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1709 __be32 **p, int *buflen)
1710 {
1711 int status;
1712
1713 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1714 return nfserr_resource;
1715 if (whotype != NFS4_ACL_WHO_NAMED)
1716 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1717 else if (group)
1718 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1719 else
1720 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1721 if (status < 0)
1722 return nfserrno(status);
1723 *p = xdr_encode_opaque(*p, NULL, status);
1724 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1725 BUG_ON(*buflen < 0);
1726 return 0;
1727 }
1728
1729 static inline __be32
1730 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1731 {
1732 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1733 }
1734
1735 static inline __be32
1736 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1737 {
1738 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1739 }
1740
1741 static inline __be32
1742 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1743 __be32 **p, int *buflen)
1744 {
1745 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1746 }
1747
1748 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1749 FATTR4_WORD0_RDATTR_ERROR)
1750 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1751
1752 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1753 {
1754 /* As per referral draft: */
1755 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1756 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1757 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1758 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1759 *rdattr_err = NFSERR_MOVED;
1760 else
1761 return nfserr_moved;
1762 }
1763 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1764 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1765 return 0;
1766 }
1767
1768 /*
1769 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1770 * ourselves.
1771 *
1772 * @countp is the buffer size in _words_; upon successful return this becomes
1773 * replaced with the number of words written.
1774 */
1775 __be32
1776 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1777 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1778 struct svc_rqst *rqstp, int ignore_crossmnt)
1779 {
1780 u32 bmval0 = bmval[0];
1781 u32 bmval1 = bmval[1];
1782 u32 bmval2 = bmval[2];
1783 struct kstat stat;
1784 struct svc_fh tempfh;
1785 struct kstatfs statfs;
1786 int buflen = *countp << 2;
1787 __be32 *attrlenp;
1788 u32 dummy;
1789 u64 dummy64;
1790 u32 rdattr_err = 0;
1791 __be32 *p = buffer;
1792 __be32 status;
1793 int err;
1794 int aclsupport = 0;
1795 struct nfs4_acl *acl = NULL;
1796 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1797 u32 minorversion = resp->cstate.minorversion;
1798 struct path path = {
1799 .mnt = exp->ex_path.mnt,
1800 .dentry = dentry,
1801 };
1802
1803 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1804 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1805 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1806 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1807
1808 if (exp->ex_fslocs.migrated) {
1809 BUG_ON(bmval[2]);
1810 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1811 if (status)
1812 goto out;
1813 }
1814
1815 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1816 if (err)
1817 goto out_nfserr;
1818 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1819 FATTR4_WORD0_MAXNAME)) ||
1820 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1821 FATTR4_WORD1_SPACE_TOTAL))) {
1822 err = vfs_statfs(&path, &statfs);
1823 if (err)
1824 goto out_nfserr;
1825 }
1826 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1827 fh_init(&tempfh, NFS4_FHSIZE);
1828 status = fh_compose(&tempfh, exp, dentry, NULL);
1829 if (status)
1830 goto out;
1831 fhp = &tempfh;
1832 }
1833 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1834 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1835 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1836 aclsupport = (err == 0);
1837 if (bmval0 & FATTR4_WORD0_ACL) {
1838 if (err == -EOPNOTSUPP)
1839 bmval0 &= ~FATTR4_WORD0_ACL;
1840 else if (err == -EINVAL) {
1841 status = nfserr_attrnotsupp;
1842 goto out;
1843 } else if (err != 0)
1844 goto out_nfserr;
1845 }
1846 }
1847
1848 if (bmval2) {
1849 if ((buflen -= 16) < 0)
1850 goto out_resource;
1851 WRITE32(3);
1852 WRITE32(bmval0);
1853 WRITE32(bmval1);
1854 WRITE32(bmval2);
1855 } else if (bmval1) {
1856 if ((buflen -= 12) < 0)
1857 goto out_resource;
1858 WRITE32(2);
1859 WRITE32(bmval0);
1860 WRITE32(bmval1);
1861 } else {
1862 if ((buflen -= 8) < 0)
1863 goto out_resource;
1864 WRITE32(1);
1865 WRITE32(bmval0);
1866 }
1867 attrlenp = p++; /* to be backfilled later */
1868
1869 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1870 u32 word0 = nfsd_suppattrs0(minorversion);
1871 u32 word1 = nfsd_suppattrs1(minorversion);
1872 u32 word2 = nfsd_suppattrs2(minorversion);
1873
1874 if (!aclsupport)
1875 word0 &= ~FATTR4_WORD0_ACL;
1876 if (!word2) {
1877 if ((buflen -= 12) < 0)
1878 goto out_resource;
1879 WRITE32(2);
1880 WRITE32(word0);
1881 WRITE32(word1);
1882 } else {
1883 if ((buflen -= 16) < 0)
1884 goto out_resource;
1885 WRITE32(3);
1886 WRITE32(word0);
1887 WRITE32(word1);
1888 WRITE32(word2);
1889 }
1890 }
1891 if (bmval0 & FATTR4_WORD0_TYPE) {
1892 if ((buflen -= 4) < 0)
1893 goto out_resource;
1894 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1895 if (dummy == NF4BAD)
1896 goto out_serverfault;
1897 WRITE32(dummy);
1898 }
1899 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1900 if ((buflen -= 4) < 0)
1901 goto out_resource;
1902 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1903 WRITE32(NFS4_FH_PERSISTENT);
1904 else
1905 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1906 }
1907 if (bmval0 & FATTR4_WORD0_CHANGE) {
1908 if ((buflen -= 8) < 0)
1909 goto out_resource;
1910 write_change(&p, &stat, dentry->d_inode);
1911 }
1912 if (bmval0 & FATTR4_WORD0_SIZE) {
1913 if ((buflen -= 8) < 0)
1914 goto out_resource;
1915 WRITE64(stat.size);
1916 }
1917 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1918 if ((buflen -= 4) < 0)
1919 goto out_resource;
1920 WRITE32(1);
1921 }
1922 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1923 if ((buflen -= 4) < 0)
1924 goto out_resource;
1925 WRITE32(1);
1926 }
1927 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1928 if ((buflen -= 4) < 0)
1929 goto out_resource;
1930 WRITE32(0);
1931 }
1932 if (bmval0 & FATTR4_WORD0_FSID) {
1933 if ((buflen -= 16) < 0)
1934 goto out_resource;
1935 if (exp->ex_fslocs.migrated) {
1936 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1937 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1938 } else switch(fsid_source(fhp)) {
1939 case FSIDSOURCE_FSID:
1940 WRITE64((u64)exp->ex_fsid);
1941 WRITE64((u64)0);
1942 break;
1943 case FSIDSOURCE_DEV:
1944 WRITE32(0);
1945 WRITE32(MAJOR(stat.dev));
1946 WRITE32(0);
1947 WRITE32(MINOR(stat.dev));
1948 break;
1949 case FSIDSOURCE_UUID:
1950 WRITEMEM(exp->ex_uuid, 16);
1951 break;
1952 }
1953 }
1954 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1955 if ((buflen -= 4) < 0)
1956 goto out_resource;
1957 WRITE32(0);
1958 }
1959 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1960 if ((buflen -= 4) < 0)
1961 goto out_resource;
1962 WRITE32(nfsd4_lease);
1963 }
1964 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1965 if ((buflen -= 4) < 0)
1966 goto out_resource;
1967 WRITE32(rdattr_err);
1968 }
1969 if (bmval0 & FATTR4_WORD0_ACL) {
1970 struct nfs4_ace *ace;
1971
1972 if (acl == NULL) {
1973 if ((buflen -= 4) < 0)
1974 goto out_resource;
1975
1976 WRITE32(0);
1977 goto out_acl;
1978 }
1979 if ((buflen -= 4) < 0)
1980 goto out_resource;
1981 WRITE32(acl->naces);
1982
1983 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1984 if ((buflen -= 4*3) < 0)
1985 goto out_resource;
1986 WRITE32(ace->type);
1987 WRITE32(ace->flag);
1988 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1989 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1990 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1991 &p, &buflen);
1992 if (status == nfserr_resource)
1993 goto out_resource;
1994 if (status)
1995 goto out;
1996 }
1997 }
1998 out_acl:
1999 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2000 if ((buflen -= 4) < 0)
2001 goto out_resource;
2002 WRITE32(aclsupport ?
2003 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2004 }
2005 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2006 if ((buflen -= 4) < 0)
2007 goto out_resource;
2008 WRITE32(1);
2009 }
2010 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2011 if ((buflen -= 4) < 0)
2012 goto out_resource;
2013 WRITE32(1);
2014 }
2015 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2016 if ((buflen -= 4) < 0)
2017 goto out_resource;
2018 WRITE32(1);
2019 }
2020 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2021 if ((buflen -= 4) < 0)
2022 goto out_resource;
2023 WRITE32(1);
2024 }
2025 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2026 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2027 if (buflen < 0)
2028 goto out_resource;
2029 WRITE32(fhp->fh_handle.fh_size);
2030 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2031 }
2032 if (bmval0 & FATTR4_WORD0_FILEID) {
2033 if ((buflen -= 8) < 0)
2034 goto out_resource;
2035 WRITE64(stat.ino);
2036 }
2037 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2038 if ((buflen -= 8) < 0)
2039 goto out_resource;
2040 WRITE64((u64) statfs.f_ffree);
2041 }
2042 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2043 if ((buflen -= 8) < 0)
2044 goto out_resource;
2045 WRITE64((u64) statfs.f_ffree);
2046 }
2047 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2048 if ((buflen -= 8) < 0)
2049 goto out_resource;
2050 WRITE64((u64) statfs.f_files);
2051 }
2052 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2053 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2054 if (status == nfserr_resource)
2055 goto out_resource;
2056 if (status)
2057 goto out;
2058 }
2059 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2060 if ((buflen -= 4) < 0)
2061 goto out_resource;
2062 WRITE32(1);
2063 }
2064 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2065 if ((buflen -= 8) < 0)
2066 goto out_resource;
2067 WRITE64(~(u64)0);
2068 }
2069 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2070 if ((buflen -= 4) < 0)
2071 goto out_resource;
2072 WRITE32(255);
2073 }
2074 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2075 if ((buflen -= 4) < 0)
2076 goto out_resource;
2077 WRITE32(statfs.f_namelen);
2078 }
2079 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2080 if ((buflen -= 8) < 0)
2081 goto out_resource;
2082 WRITE64((u64) svc_max_payload(rqstp));
2083 }
2084 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2085 if ((buflen -= 8) < 0)
2086 goto out_resource;
2087 WRITE64((u64) svc_max_payload(rqstp));
2088 }
2089 if (bmval1 & FATTR4_WORD1_MODE) {
2090 if ((buflen -= 4) < 0)
2091 goto out_resource;
2092 WRITE32(stat.mode & S_IALLUGO);
2093 }
2094 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2095 if ((buflen -= 4) < 0)
2096 goto out_resource;
2097 WRITE32(1);
2098 }
2099 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2100 if ((buflen -= 4) < 0)
2101 goto out_resource;
2102 WRITE32(stat.nlink);
2103 }
2104 if (bmval1 & FATTR4_WORD1_OWNER) {
2105 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2106 if (status == nfserr_resource)
2107 goto out_resource;
2108 if (status)
2109 goto out;
2110 }
2111 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2112 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2113 if (status == nfserr_resource)
2114 goto out_resource;
2115 if (status)
2116 goto out;
2117 }
2118 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2119 if ((buflen -= 8) < 0)
2120 goto out_resource;
2121 WRITE32((u32) MAJOR(stat.rdev));
2122 WRITE32((u32) MINOR(stat.rdev));
2123 }
2124 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2125 if ((buflen -= 8) < 0)
2126 goto out_resource;
2127 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2128 WRITE64(dummy64);
2129 }
2130 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2131 if ((buflen -= 8) < 0)
2132 goto out_resource;
2133 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2134 WRITE64(dummy64);
2135 }
2136 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2137 if ((buflen -= 8) < 0)
2138 goto out_resource;
2139 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2140 WRITE64(dummy64);
2141 }
2142 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2143 if ((buflen -= 8) < 0)
2144 goto out_resource;
2145 dummy64 = (u64)stat.blocks << 9;
2146 WRITE64(dummy64);
2147 }
2148 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2149 if ((buflen -= 12) < 0)
2150 goto out_resource;
2151 WRITE32(0);
2152 WRITE32(stat.atime.tv_sec);
2153 WRITE32(stat.atime.tv_nsec);
2154 }
2155 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2156 if ((buflen -= 12) < 0)
2157 goto out_resource;
2158 WRITE32(0);
2159 WRITE32(1);
2160 WRITE32(0);
2161 }
2162 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2163 if ((buflen -= 12) < 0)
2164 goto out_resource;
2165 WRITE32(0);
2166 WRITE32(stat.ctime.tv_sec);
2167 WRITE32(stat.ctime.tv_nsec);
2168 }
2169 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2170 if ((buflen -= 12) < 0)
2171 goto out_resource;
2172 WRITE32(0);
2173 WRITE32(stat.mtime.tv_sec);
2174 WRITE32(stat.mtime.tv_nsec);
2175 }
2176 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2177 if ((buflen -= 8) < 0)
2178 goto out_resource;
2179 /*
2180 * Get parent's attributes if not ignoring crossmount
2181 * and this is the root of a cross-mounted filesystem.
2182 */
2183 if (ignore_crossmnt == 0 &&
2184 dentry == exp->ex_path.mnt->mnt_root) {
2185 struct path path = exp->ex_path;
2186 path_get(&path);
2187 while (follow_up(&path)) {
2188 if (path.dentry != path.mnt->mnt_root)
2189 break;
2190 }
2191 err = vfs_getattr(path.mnt, path.dentry, &stat);
2192 path_put(&path);
2193 if (err)
2194 goto out_nfserr;
2195 }
2196 WRITE64(stat.ino);
2197 }
2198 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2199 WRITE32(3);
2200 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2201 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2202 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2203 }
2204
2205 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2206 *countp = p - buffer;
2207 status = nfs_ok;
2208
2209 out:
2210 kfree(acl);
2211 if (fhp == &tempfh)
2212 fh_put(&tempfh);
2213 return status;
2214 out_nfserr:
2215 status = nfserrno(err);
2216 goto out;
2217 out_resource:
2218 *countp = 0;
2219 status = nfserr_resource;
2220 goto out;
2221 out_serverfault:
2222 status = nfserr_serverfault;
2223 goto out;
2224 }
2225
2226 static inline int attributes_need_mount(u32 *bmval)
2227 {
2228 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2229 return 1;
2230 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2231 return 1;
2232 return 0;
2233 }
2234
2235 static __be32
2236 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2237 const char *name, int namlen, __be32 *p, int *buflen)
2238 {
2239 struct svc_export *exp = cd->rd_fhp->fh_export;
2240 struct dentry *dentry;
2241 __be32 nfserr;
2242 int ignore_crossmnt = 0;
2243
2244 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2245 if (IS_ERR(dentry))
2246 return nfserrno(PTR_ERR(dentry));
2247 if (!dentry->d_inode) {
2248 /*
2249 * nfsd_buffered_readdir drops the i_mutex between
2250 * readdir and calling this callback, leaving a window
2251 * where this directory entry could have gone away.
2252 */
2253 dput(dentry);
2254 return nfserr_noent;
2255 }
2256
2257 exp_get(exp);
2258 /*
2259 * In the case of a mountpoint, the client may be asking for
2260 * attributes that are only properties of the underlying filesystem
2261 * as opposed to the cross-mounted file system. In such a case,
2262 * we will not follow the cross mount and will fill the attribtutes
2263 * directly from the mountpoint dentry.
2264 */
2265 if (nfsd_mountpoint(dentry, exp)) {
2266 int err;
2267
2268 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2269 && !attributes_need_mount(cd->rd_bmval)) {
2270 ignore_crossmnt = 1;
2271 goto out_encode;
2272 }
2273 /*
2274 * Why the heck aren't we just using nfsd_lookup??
2275 * Different "."/".." handling? Something else?
2276 * At least, add a comment here to explain....
2277 */
2278 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2279 if (err) {
2280 nfserr = nfserrno(err);
2281 goto out_put;
2282 }
2283 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2284 if (nfserr)
2285 goto out_put;
2286
2287 }
2288 out_encode:
2289 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2290 cd->rd_rqstp, ignore_crossmnt);
2291 out_put:
2292 dput(dentry);
2293 exp_put(exp);
2294 return nfserr;
2295 }
2296
2297 static __be32 *
2298 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2299 {
2300 __be32 *attrlenp;
2301
2302 if (buflen < 6)
2303 return NULL;
2304 *p++ = htonl(2);
2305 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2306 *p++ = htonl(0); /* bmval1 */
2307
2308 attrlenp = p++;
2309 *p++ = nfserr; /* no htonl */
2310 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2311 return p;
2312 }
2313
2314 static int
2315 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2316 loff_t offset, u64 ino, unsigned int d_type)
2317 {
2318 struct readdir_cd *ccd = ccdv;
2319 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2320 int buflen;
2321 __be32 *p = cd->buffer;
2322 __be32 *cookiep;
2323 __be32 nfserr = nfserr_toosmall;
2324
2325 /* In nfsv4, "." and ".." never make it onto the wire.. */
2326 if (name && isdotent(name, namlen)) {
2327 cd->common.err = nfs_ok;
2328 return 0;
2329 }
2330
2331 if (cd->offset)
2332 xdr_encode_hyper(cd->offset, (u64) offset);
2333
2334 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2335 if (buflen < 0)
2336 goto fail;
2337
2338 *p++ = xdr_one; /* mark entry present */
2339 cookiep = p;
2340 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2341 p = xdr_encode_array(p, name, namlen); /* name length & name */
2342
2343 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2344 switch (nfserr) {
2345 case nfs_ok:
2346 p += buflen;
2347 break;
2348 case nfserr_resource:
2349 nfserr = nfserr_toosmall;
2350 goto fail;
2351 case nfserr_noent:
2352 goto skip_entry;
2353 default:
2354 /*
2355 * If the client requested the RDATTR_ERROR attribute,
2356 * we stuff the error code into this attribute
2357 * and continue. If this attribute was not requested,
2358 * then in accordance with the spec, we fail the
2359 * entire READDIR operation(!)
2360 */
2361 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2362 goto fail;
2363 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2364 if (p == NULL) {
2365 nfserr = nfserr_toosmall;
2366 goto fail;
2367 }
2368 }
2369 cd->buflen -= (p - cd->buffer);
2370 cd->buffer = p;
2371 cd->offset = cookiep;
2372 skip_entry:
2373 cd->common.err = nfs_ok;
2374 return 0;
2375 fail:
2376 cd->common.err = nfserr;
2377 return -EINVAL;
2378 }
2379
2380 static void
2381 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2382 {
2383 __be32 *p;
2384
2385 RESERVE_SPACE(sizeof(stateid_t));
2386 WRITE32(sid->si_generation);
2387 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2388 ADJUST_ARGS();
2389 }
2390
2391 static __be32
2392 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2393 {
2394 __be32 *p;
2395
2396 if (!nfserr) {
2397 RESERVE_SPACE(8);
2398 WRITE32(access->ac_supported);
2399 WRITE32(access->ac_resp_access);
2400 ADJUST_ARGS();
2401 }
2402 return nfserr;
2403 }
2404
2405 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2406 {
2407 __be32 *p;
2408
2409 if (!nfserr) {
2410 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2411 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2412 WRITE32(bcts->dir);
2413 /* XXX: ? */
2414 WRITE32(0);
2415 ADJUST_ARGS();
2416 }
2417 return nfserr;
2418 }
2419
2420 static __be32
2421 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2422 {
2423 ENCODE_SEQID_OP_HEAD;
2424
2425 if (!nfserr)
2426 nfsd4_encode_stateid(resp, &close->cl_stateid);
2427
2428 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2429 return nfserr;
2430 }
2431
2432
2433 static __be32
2434 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2435 {
2436 __be32 *p;
2437
2438 if (!nfserr) {
2439 RESERVE_SPACE(8);
2440 WRITEMEM(commit->co_verf.data, 8);
2441 ADJUST_ARGS();
2442 }
2443 return nfserr;
2444 }
2445
2446 static __be32
2447 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2448 {
2449 __be32 *p;
2450
2451 if (!nfserr) {
2452 RESERVE_SPACE(32);
2453 write_cinfo(&p, &create->cr_cinfo);
2454 WRITE32(2);
2455 WRITE32(create->cr_bmval[0]);
2456 WRITE32(create->cr_bmval[1]);
2457 ADJUST_ARGS();
2458 }
2459 return nfserr;
2460 }
2461
2462 static __be32
2463 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2464 {
2465 struct svc_fh *fhp = getattr->ga_fhp;
2466 int buflen;
2467
2468 if (nfserr)
2469 return nfserr;
2470
2471 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2472 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2473 resp->p, &buflen, getattr->ga_bmval,
2474 resp->rqstp, 0);
2475 if (!nfserr)
2476 resp->p += buflen;
2477 return nfserr;
2478 }
2479
2480 static __be32
2481 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2482 {
2483 struct svc_fh *fhp = *fhpp;
2484 unsigned int len;
2485 __be32 *p;
2486
2487 if (!nfserr) {
2488 len = fhp->fh_handle.fh_size;
2489 RESERVE_SPACE(len + 4);
2490 WRITE32(len);
2491 WRITEMEM(&fhp->fh_handle.fh_base, len);
2492 ADJUST_ARGS();
2493 }
2494 return nfserr;
2495 }
2496
2497 /*
2498 * Including all fields other than the name, a LOCK4denied structure requires
2499 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2500 */
2501 static void
2502 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2503 {
2504 __be32 *p;
2505
2506 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2507 WRITE64(ld->ld_start);
2508 WRITE64(ld->ld_length);
2509 WRITE32(ld->ld_type);
2510 if (ld->ld_sop) {
2511 WRITEMEM(&ld->ld_clientid, 8);
2512 WRITE32(ld->ld_sop->so_owner.len);
2513 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2514 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2515 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2516 WRITE64((u64)0); /* clientid */
2517 WRITE32(0); /* length of owner name */
2518 }
2519 ADJUST_ARGS();
2520 }
2521
2522 static __be32
2523 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2524 {
2525 ENCODE_SEQID_OP_HEAD;
2526
2527 if (!nfserr)
2528 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2529 else if (nfserr == nfserr_denied)
2530 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2531
2532 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2533 return nfserr;
2534 }
2535
2536 static __be32
2537 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2538 {
2539 if (nfserr == nfserr_denied)
2540 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2541 return nfserr;
2542 }
2543
2544 static __be32
2545 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2546 {
2547 ENCODE_SEQID_OP_HEAD;
2548
2549 if (!nfserr)
2550 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2551
2552 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2553 return nfserr;
2554 }
2555
2556
2557 static __be32
2558 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2559 {
2560 __be32 *p;
2561
2562 if (!nfserr) {
2563 RESERVE_SPACE(20);
2564 write_cinfo(&p, &link->li_cinfo);
2565 ADJUST_ARGS();
2566 }
2567 return nfserr;
2568 }
2569
2570
2571 static __be32
2572 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2573 {
2574 __be32 *p;
2575 ENCODE_SEQID_OP_HEAD;
2576
2577 if (nfserr)
2578 goto out;
2579
2580 nfsd4_encode_stateid(resp, &open->op_stateid);
2581 RESERVE_SPACE(40);
2582 write_cinfo(&p, &open->op_cinfo);
2583 WRITE32(open->op_rflags);
2584 WRITE32(2);
2585 WRITE32(open->op_bmval[0]);
2586 WRITE32(open->op_bmval[1]);
2587 WRITE32(open->op_delegate_type);
2588 ADJUST_ARGS();
2589
2590 switch (open->op_delegate_type) {
2591 case NFS4_OPEN_DELEGATE_NONE:
2592 break;
2593 case NFS4_OPEN_DELEGATE_READ:
2594 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2595 RESERVE_SPACE(20);
2596 WRITE32(open->op_recall);
2597
2598 /*
2599 * TODO: ACE's in delegations
2600 */
2601 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2602 WRITE32(0);
2603 WRITE32(0);
2604 WRITE32(0); /* XXX: is NULL principal ok? */
2605 ADJUST_ARGS();
2606 break;
2607 case NFS4_OPEN_DELEGATE_WRITE:
2608 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2609 RESERVE_SPACE(32);
2610 WRITE32(0);
2611
2612 /*
2613 * TODO: space_limit's in delegations
2614 */
2615 WRITE32(NFS4_LIMIT_SIZE);
2616 WRITE32(~(u32)0);
2617 WRITE32(~(u32)0);
2618
2619 /*
2620 * TODO: ACE's in delegations
2621 */
2622 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2623 WRITE32(0);
2624 WRITE32(0);
2625 WRITE32(0); /* XXX: is NULL principal ok? */
2626 ADJUST_ARGS();
2627 break;
2628 default:
2629 BUG();
2630 }
2631 /* XXX save filehandle here */
2632 out:
2633 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2634 return nfserr;
2635 }
2636
2637 static __be32
2638 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2639 {
2640 ENCODE_SEQID_OP_HEAD;
2641
2642 if (!nfserr)
2643 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2644
2645 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2646 return nfserr;
2647 }
2648
2649 static __be32
2650 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2651 {
2652 ENCODE_SEQID_OP_HEAD;
2653
2654 if (!nfserr)
2655 nfsd4_encode_stateid(resp, &od->od_stateid);
2656
2657 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2658 return nfserr;
2659 }
2660
2661 static __be32
2662 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2663 struct nfsd4_read *read)
2664 {
2665 u32 eof;
2666 int v, pn;
2667 unsigned long maxcount;
2668 long len;
2669 __be32 *p;
2670
2671 if (nfserr)
2672 return nfserr;
2673 if (resp->xbuf->page_len)
2674 return nfserr_resource;
2675
2676 RESERVE_SPACE(8); /* eof flag and byte count */
2677
2678 maxcount = svc_max_payload(resp->rqstp);
2679 if (maxcount > read->rd_length)
2680 maxcount = read->rd_length;
2681
2682 len = maxcount;
2683 v = 0;
2684 while (len > 0) {
2685 pn = resp->rqstp->rq_resused++;
2686 resp->rqstp->rq_vec[v].iov_base =
2687 page_address(resp->rqstp->rq_respages[pn]);
2688 resp->rqstp->rq_vec[v].iov_len =
2689 len < PAGE_SIZE ? len : PAGE_SIZE;
2690 v++;
2691 len -= PAGE_SIZE;
2692 }
2693 read->rd_vlen = v;
2694
2695 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2696 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2697 &maxcount);
2698
2699 if (nfserr == nfserr_symlink)
2700 nfserr = nfserr_inval;
2701 if (nfserr)
2702 return nfserr;
2703 eof = (read->rd_offset + maxcount >=
2704 read->rd_fhp->fh_dentry->d_inode->i_size);
2705
2706 WRITE32(eof);
2707 WRITE32(maxcount);
2708 ADJUST_ARGS();
2709 resp->xbuf->head[0].iov_len = (char*)p
2710 - (char*)resp->xbuf->head[0].iov_base;
2711 resp->xbuf->page_len = maxcount;
2712
2713 /* Use rest of head for padding and remaining ops: */
2714 resp->xbuf->tail[0].iov_base = p;
2715 resp->xbuf->tail[0].iov_len = 0;
2716 if (maxcount&3) {
2717 RESERVE_SPACE(4);
2718 WRITE32(0);
2719 resp->xbuf->tail[0].iov_base += maxcount&3;
2720 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2721 ADJUST_ARGS();
2722 }
2723 return 0;
2724 }
2725
2726 static __be32
2727 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2728 {
2729 int maxcount;
2730 char *page;
2731 __be32 *p;
2732
2733 if (nfserr)
2734 return nfserr;
2735 if (resp->xbuf->page_len)
2736 return nfserr_resource;
2737
2738 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2739
2740 maxcount = PAGE_SIZE;
2741 RESERVE_SPACE(4);
2742
2743 /*
2744 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2745 * if they would overflow the buffer. Is this kosher in NFSv4? If
2746 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2747 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2748 */
2749 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2750 if (nfserr == nfserr_isdir)
2751 return nfserr_inval;
2752 if (nfserr)
2753 return nfserr;
2754
2755 WRITE32(maxcount);
2756 ADJUST_ARGS();
2757 resp->xbuf->head[0].iov_len = (char*)p
2758 - (char*)resp->xbuf->head[0].iov_base;
2759 resp->xbuf->page_len = maxcount;
2760
2761 /* Use rest of head for padding and remaining ops: */
2762 resp->xbuf->tail[0].iov_base = p;
2763 resp->xbuf->tail[0].iov_len = 0;
2764 if (maxcount&3) {
2765 RESERVE_SPACE(4);
2766 WRITE32(0);
2767 resp->xbuf->tail[0].iov_base += maxcount&3;
2768 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2769 ADJUST_ARGS();
2770 }
2771 return 0;
2772 }
2773
2774 static __be32
2775 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2776 {
2777 int maxcount;
2778 loff_t offset;
2779 __be32 *page, *savep, *tailbase;
2780 __be32 *p;
2781
2782 if (nfserr)
2783 return nfserr;
2784 if (resp->xbuf->page_len)
2785 return nfserr_resource;
2786
2787 RESERVE_SPACE(8); /* verifier */
2788 savep = p;
2789
2790 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2791 WRITE32(0);
2792 WRITE32(0);
2793 ADJUST_ARGS();
2794 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2795 tailbase = p;
2796
2797 maxcount = PAGE_SIZE;
2798 if (maxcount > readdir->rd_maxcount)
2799 maxcount = readdir->rd_maxcount;
2800
2801 /*
2802 * Convert from bytes to words, account for the two words already
2803 * written, make sure to leave two words at the end for the next
2804 * pointer and eof field.
2805 */
2806 maxcount = (maxcount >> 2) - 4;
2807 if (maxcount < 0) {
2808 nfserr = nfserr_toosmall;
2809 goto err_no_verf;
2810 }
2811
2812 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2813 readdir->common.err = 0;
2814 readdir->buflen = maxcount;
2815 readdir->buffer = page;
2816 readdir->offset = NULL;
2817
2818 offset = readdir->rd_cookie;
2819 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2820 &offset,
2821 &readdir->common, nfsd4_encode_dirent);
2822 if (nfserr == nfs_ok &&
2823 readdir->common.err == nfserr_toosmall &&
2824 readdir->buffer == page)
2825 nfserr = nfserr_toosmall;
2826 if (nfserr == nfserr_symlink)
2827 nfserr = nfserr_notdir;
2828 if (nfserr)
2829 goto err_no_verf;
2830
2831 if (readdir->offset)
2832 xdr_encode_hyper(readdir->offset, offset);
2833
2834 p = readdir->buffer;
2835 *p++ = 0; /* no more entries */
2836 *p++ = htonl(readdir->common.err == nfserr_eof);
2837 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2838 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2839
2840 /* Use rest of head for padding and remaining ops: */
2841 resp->xbuf->tail[0].iov_base = tailbase;
2842 resp->xbuf->tail[0].iov_len = 0;
2843 resp->p = resp->xbuf->tail[0].iov_base;
2844 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2845
2846 return 0;
2847 err_no_verf:
2848 p = savep;
2849 ADJUST_ARGS();
2850 return nfserr;
2851 }
2852
2853 static __be32
2854 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2855 {
2856 __be32 *p;
2857
2858 if (!nfserr) {
2859 RESERVE_SPACE(20);
2860 write_cinfo(&p, &remove->rm_cinfo);
2861 ADJUST_ARGS();
2862 }
2863 return nfserr;
2864 }
2865
2866 static __be32
2867 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2868 {
2869 __be32 *p;
2870
2871 if (!nfserr) {
2872 RESERVE_SPACE(40);
2873 write_cinfo(&p, &rename->rn_sinfo);
2874 write_cinfo(&p, &rename->rn_tinfo);
2875 ADJUST_ARGS();
2876 }
2877 return nfserr;
2878 }
2879
2880 static __be32
2881 nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
2882 __be32 nfserr,struct svc_export *exp)
2883 {
2884 int i = 0;
2885 u32 nflavs;
2886 struct exp_flavor_info *flavs;
2887 struct exp_flavor_info def_flavs[2];
2888 __be32 *p;
2889
2890 if (nfserr)
2891 goto out;
2892 if (exp->ex_nflavors) {
2893 flavs = exp->ex_flavors;
2894 nflavs = exp->ex_nflavors;
2895 } else { /* Handling of some defaults in absence of real secinfo: */
2896 flavs = def_flavs;
2897 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2898 nflavs = 2;
2899 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2900 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2901 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2902 nflavs = 1;
2903 flavs[0].pseudoflavor
2904 = svcauth_gss_flavor(exp->ex_client);
2905 } else {
2906 nflavs = 1;
2907 flavs[0].pseudoflavor
2908 = exp->ex_client->flavour->flavour;
2909 }
2910 }
2911
2912 RESERVE_SPACE(4);
2913 WRITE32(nflavs);
2914 ADJUST_ARGS();
2915 for (i = 0; i < nflavs; i++) {
2916 u32 flav = flavs[i].pseudoflavor;
2917 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2918
2919 if (gm) {
2920 RESERVE_SPACE(4);
2921 WRITE32(RPC_AUTH_GSS);
2922 ADJUST_ARGS();
2923 RESERVE_SPACE(4 + gm->gm_oid.len);
2924 WRITE32(gm->gm_oid.len);
2925 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2926 ADJUST_ARGS();
2927 RESERVE_SPACE(4);
2928 WRITE32(0); /* qop */
2929 ADJUST_ARGS();
2930 RESERVE_SPACE(4);
2931 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2932 ADJUST_ARGS();
2933 gss_mech_put(gm);
2934 } else {
2935 RESERVE_SPACE(4);
2936 WRITE32(flav);
2937 ADJUST_ARGS();
2938 }
2939 }
2940 out:
2941 if (exp)
2942 exp_put(exp);
2943 return nfserr;
2944 }
2945
2946 static __be32
2947 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2948 struct nfsd4_secinfo *secinfo)
2949 {
2950 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
2951 }
2952
2953 static __be32
2954 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
2955 struct nfsd4_secinfo_no_name *secinfo)
2956 {
2957 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
2958 }
2959
2960 /*
2961 * The SETATTR encode routine is special -- it always encodes a bitmap,
2962 * regardless of the error status.
2963 */
2964 static __be32
2965 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2966 {
2967 __be32 *p;
2968
2969 RESERVE_SPACE(12);
2970 if (nfserr) {
2971 WRITE32(2);
2972 WRITE32(0);
2973 WRITE32(0);
2974 }
2975 else {
2976 WRITE32(2);
2977 WRITE32(setattr->sa_bmval[0]);
2978 WRITE32(setattr->sa_bmval[1]);
2979 }
2980 ADJUST_ARGS();
2981 return nfserr;
2982 }
2983
2984 static __be32
2985 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2986 {
2987 __be32 *p;
2988
2989 if (!nfserr) {
2990 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2991 WRITEMEM(&scd->se_clientid, 8);
2992 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2993 ADJUST_ARGS();
2994 }
2995 else if (nfserr == nfserr_clid_inuse) {
2996 RESERVE_SPACE(8);
2997 WRITE32(0);
2998 WRITE32(0);
2999 ADJUST_ARGS();
3000 }
3001 return nfserr;
3002 }
3003
3004 static __be32
3005 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3006 {
3007 __be32 *p;
3008
3009 if (!nfserr) {
3010 RESERVE_SPACE(16);
3011 WRITE32(write->wr_bytes_written);
3012 WRITE32(write->wr_how_written);
3013 WRITEMEM(write->wr_verifier.data, 8);
3014 ADJUST_ARGS();
3015 }
3016 return nfserr;
3017 }
3018
3019 static __be32
3020 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
3021 struct nfsd4_exchange_id *exid)
3022 {
3023 __be32 *p;
3024 char *major_id;
3025 char *server_scope;
3026 int major_id_sz;
3027 int server_scope_sz;
3028 uint64_t minor_id = 0;
3029
3030 if (nfserr)
3031 return nfserr;
3032
3033 major_id = utsname()->nodename;
3034 major_id_sz = strlen(major_id);
3035 server_scope = utsname()->nodename;
3036 server_scope_sz = strlen(server_scope);
3037
3038 RESERVE_SPACE(
3039 8 /* eir_clientid */ +
3040 4 /* eir_sequenceid */ +
3041 4 /* eir_flags */ +
3042 4 /* spr_how (SP4_NONE) */ +
3043 8 /* so_minor_id */ +
3044 4 /* so_major_id.len */ +
3045 (XDR_QUADLEN(major_id_sz) * 4) +
3046 4 /* eir_server_scope.len */ +
3047 (XDR_QUADLEN(server_scope_sz) * 4) +
3048 4 /* eir_server_impl_id.count (0) */);
3049
3050 WRITEMEM(&exid->clientid, 8);
3051 WRITE32(exid->seqid);
3052 WRITE32(exid->flags);
3053
3054 /* state_protect4_r. Currently only support SP4_NONE */
3055 BUG_ON(exid->spa_how != SP4_NONE);
3056 WRITE32(exid->spa_how);
3057
3058 /* The server_owner struct */
3059 WRITE64(minor_id); /* Minor id */
3060 /* major id */
3061 WRITE32(major_id_sz);
3062 WRITEMEM(major_id, major_id_sz);
3063
3064 /* Server scope */
3065 WRITE32(server_scope_sz);
3066 WRITEMEM(server_scope, server_scope_sz);
3067
3068 /* Implementation id */
3069 WRITE32(0); /* zero length nfs_impl_id4 array */
3070 ADJUST_ARGS();
3071 return 0;
3072 }
3073
3074 static __be32
3075 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
3076 struct nfsd4_create_session *sess)
3077 {
3078 __be32 *p;
3079
3080 if (nfserr)
3081 return nfserr;
3082
3083 RESERVE_SPACE(24);
3084 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3085 WRITE32(sess->seqid);
3086 WRITE32(sess->flags);
3087 ADJUST_ARGS();
3088
3089 RESERVE_SPACE(28);
3090 WRITE32(0); /* headerpadsz */
3091 WRITE32(sess->fore_channel.maxreq_sz);
3092 WRITE32(sess->fore_channel.maxresp_sz);
3093 WRITE32(sess->fore_channel.maxresp_cached);
3094 WRITE32(sess->fore_channel.maxops);
3095 WRITE32(sess->fore_channel.maxreqs);
3096 WRITE32(sess->fore_channel.nr_rdma_attrs);
3097 ADJUST_ARGS();
3098
3099 if (sess->fore_channel.nr_rdma_attrs) {
3100 RESERVE_SPACE(4);
3101 WRITE32(sess->fore_channel.rdma_attrs);
3102 ADJUST_ARGS();
3103 }
3104
3105 RESERVE_SPACE(28);
3106 WRITE32(0); /* headerpadsz */
3107 WRITE32(sess->back_channel.maxreq_sz);
3108 WRITE32(sess->back_channel.maxresp_sz);
3109 WRITE32(sess->back_channel.maxresp_cached);
3110 WRITE32(sess->back_channel.maxops);
3111 WRITE32(sess->back_channel.maxreqs);
3112 WRITE32(sess->back_channel.nr_rdma_attrs);
3113 ADJUST_ARGS();
3114
3115 if (sess->back_channel.nr_rdma_attrs) {
3116 RESERVE_SPACE(4);
3117 WRITE32(sess->back_channel.rdma_attrs);
3118 ADJUST_ARGS();
3119 }
3120 return 0;
3121 }
3122
3123 static __be32
3124 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3125 struct nfsd4_destroy_session *destroy_session)
3126 {
3127 return nfserr;
3128 }
3129
3130 static __be32
3131 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3132 struct nfsd4_sequence *seq)
3133 {
3134 __be32 *p;
3135
3136 if (nfserr)
3137 return nfserr;
3138
3139 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3140 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3141 WRITE32(seq->seqid);
3142 WRITE32(seq->slotid);
3143 WRITE32(seq->maxslots);
3144 /* For now: target_maxslots = maxslots */
3145 WRITE32(seq->maxslots);
3146 WRITE32(seq->status_flags);
3147
3148 ADJUST_ARGS();
3149 resp->cstate.datap = p; /* DRC cache data pointer */
3150 return 0;
3151 }
3152
3153 static __be32
3154 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3155 {
3156 return nfserr;
3157 }
3158
3159 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3160
3161 /*
3162 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3163 * since we don't need to filter out obsolete ops as this is
3164 * done in the decoding phase.
3165 */
3166 static nfsd4_enc nfsd4_enc_ops[] = {
3167 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3168 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3169 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3170 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3171 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3172 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3173 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3174 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3175 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3176 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3177 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3178 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3179 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3180 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3181 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3182 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3183 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3184 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3185 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3186 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3187 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3188 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3189 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3190 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3191 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3192 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3193 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3194 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3195 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3196 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3197 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3198 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3199 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3200 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3201 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3202 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3203 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3204
3205 /* NFSv4.1 operations */
3206 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3207 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
3208 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3209 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3210 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3211 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3212 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3213 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3214 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3215 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3216 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3217 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3218 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
3219 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3220 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3221 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3222 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3223 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3224 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3225 };
3226
3227 /*
3228 * Calculate the total amount of memory that the compound response has taken
3229 * after encoding the current operation.
3230 *
3231 * pad: add on 8 bytes for the next operation's op_code and status so that
3232 * there is room to cache a failure on the next operation.
3233 *
3234 * Compare this length to the session se_fmaxresp_cached.
3235 *
3236 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3237 * will be at least a page and will therefore hold the xdr_buf head.
3238 */
3239 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3240 {
3241 int status = 0;
3242 struct xdr_buf *xb = &resp->rqstp->rq_res;
3243 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3244 struct nfsd4_session *session = NULL;
3245 struct nfsd4_slot *slot = resp->cstate.slot;
3246 u32 length, tlen = 0, pad = 8;
3247
3248 if (!nfsd4_has_session(&resp->cstate))
3249 return status;
3250
3251 session = resp->cstate.session;
3252 if (session == NULL || slot->sl_cachethis == 0)
3253 return status;
3254
3255 if (resp->opcnt >= args->opcnt)
3256 pad = 0; /* this is the last operation */
3257
3258 if (xb->page_len == 0) {
3259 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3260 } else {
3261 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3262 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3263
3264 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3265 }
3266 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3267 length, xb->page_len, tlen, pad);
3268
3269 if (length <= session->se_fchannel.maxresp_cached)
3270 return status;
3271 else
3272 return nfserr_rep_too_big_to_cache;
3273 }
3274
3275 void
3276 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3277 {
3278 __be32 *statp;
3279 __be32 *p;
3280
3281 RESERVE_SPACE(8);
3282 WRITE32(op->opnum);
3283 statp = p++; /* to be backfilled at the end */
3284 ADJUST_ARGS();
3285
3286 if (op->opnum == OP_ILLEGAL)
3287 goto status;
3288 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3289 !nfsd4_enc_ops[op->opnum]);
3290 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3291 /* nfsd4_check_drc_limit guarantees enough room for error status */
3292 if (!op->status && nfsd4_check_drc_limit(resp))
3293 op->status = nfserr_rep_too_big_to_cache;
3294 status:
3295 /*
3296 * Note: We write the status directly, instead of using WRITE32(),
3297 * since it is already in network byte order.
3298 */
3299 *statp = op->status;
3300 }
3301
3302 /*
3303 * Encode the reply stored in the stateowner reply cache
3304 *
3305 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3306 * previously sent already encoded operation.
3307 *
3308 * called with nfs4_lock_state() held
3309 */
3310 void
3311 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3312 {
3313 __be32 *p;
3314 struct nfs4_replay *rp = op->replay;
3315
3316 BUG_ON(!rp);
3317
3318 RESERVE_SPACE(8);
3319 WRITE32(op->opnum);
3320 *p++ = rp->rp_status; /* already xdr'ed */
3321 ADJUST_ARGS();
3322
3323 RESERVE_SPACE(rp->rp_buflen);
3324 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3325 ADJUST_ARGS();
3326 }
3327
3328 int
3329 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3330 {
3331 return xdr_ressize_check(rqstp, p);
3332 }
3333
3334 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3335 {
3336 if (args->ops != args->iops) {
3337 kfree(args->ops);
3338 args->ops = args->iops;
3339 }
3340 kfree(args->tmpp);
3341 args->tmpp = NULL;
3342 while (args->to_free) {
3343 struct tmpbuf *tb = args->to_free;
3344 args->to_free = tb->next;
3345 tb->release(tb->buf);
3346 kfree(tb);
3347 }
3348 }
3349
3350 int
3351 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3352 {
3353 __be32 status;
3354
3355 args->p = p;
3356 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3357 args->pagelist = rqstp->rq_arg.pages;
3358 args->pagelen = rqstp->rq_arg.page_len;
3359 args->tmpp = NULL;
3360 args->to_free = NULL;
3361 args->ops = args->iops;
3362 args->rqstp = rqstp;
3363
3364 status = nfsd4_decode_compound(args);
3365 if (status) {
3366 nfsd4_release_compoundargs(args);
3367 }
3368 return !status;
3369 }
3370
3371 int
3372 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3373 {
3374 /*
3375 * All that remains is to write the tag and operation count...
3376 */
3377 struct nfsd4_compound_state *cs = &resp->cstate;
3378 struct kvec *iov;
3379 p = resp->tagp;
3380 *p++ = htonl(resp->taglen);
3381 memcpy(p, resp->tag, resp->taglen);
3382 p += XDR_QUADLEN(resp->taglen);
3383 *p++ = htonl(resp->opcnt);
3384
3385 if (rqstp->rq_res.page_len)
3386 iov = &rqstp->rq_res.tail[0];
3387 else
3388 iov = &rqstp->rq_res.head[0];
3389 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3390 BUG_ON(iov->iov_len > PAGE_SIZE);
3391 if (nfsd4_has_session(cs)) {
3392 if (cs->status != nfserr_replay_cache) {
3393 nfsd4_store_cache_entry(resp);
3394 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3395 cs->slot->sl_inuse = false;
3396 }
3397 /* Renew the clientid on success and on replay */
3398 release_session_client(cs->session);
3399 nfsd4_put_session(cs->session);
3400 }
3401 return 1;
3402 }
3403
3404 /*
3405 * Local variables:
3406 * c-basic-offset: 8
3407 * End:
3408 */