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nfsd4: set sequence flag when backchannel is down
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / nfsd / nfs4xdr.c
blob956629b9cdc9c841a0f428ad12e9687cec21295f
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 ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
321 goto out_nfserr;
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 ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
332 goto out_nfserr;
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 u32 dummy;
428
429 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
430 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
431 READ32(bcts->dir);
432 /* XXX: Perhaps Tom Tucker could help us figure out how we
433 * should be using ctsa_use_conn_in_rdma_mode: */
434 READ32(dummy);
435
436 DECODE_TAIL;
437 }
438
439 static __be32
440 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
441 {
442 DECODE_HEAD;
443
444 close->cl_stateowner = NULL;
445 READ_BUF(4);
446 READ32(close->cl_seqid);
447 return nfsd4_decode_stateid(argp, &close->cl_stateid);
448
449 DECODE_TAIL;
450 }
451
452
453 static __be32
454 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
455 {
456 DECODE_HEAD;
457
458 READ_BUF(12);
459 READ64(commit->co_offset);
460 READ32(commit->co_count);
461
462 DECODE_TAIL;
463 }
464
465 static __be32
466 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
467 {
468 DECODE_HEAD;
469
470 READ_BUF(4);
471 READ32(create->cr_type);
472 switch (create->cr_type) {
473 case NF4LNK:
474 READ_BUF(4);
475 READ32(create->cr_linklen);
476 READ_BUF(create->cr_linklen);
477 SAVEMEM(create->cr_linkname, create->cr_linklen);
478 break;
479 case NF4BLK:
480 case NF4CHR:
481 READ_BUF(8);
482 READ32(create->cr_specdata1);
483 READ32(create->cr_specdata2);
484 break;
485 case NF4SOCK:
486 case NF4FIFO:
487 case NF4DIR:
488 default:
489 break;
490 }
491
492 READ_BUF(4);
493 READ32(create->cr_namelen);
494 READ_BUF(create->cr_namelen);
495 SAVEMEM(create->cr_name, create->cr_namelen);
496 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
497 return status;
498
499 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
500 &create->cr_acl);
501 if (status)
502 goto out;
503
504 DECODE_TAIL;
505 }
506
507 static inline __be32
508 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
509 {
510 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
511 }
512
513 static inline __be32
514 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
515 {
516 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
517 }
518
519 static __be32
520 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
521 {
522 DECODE_HEAD;
523
524 READ_BUF(4);
525 READ32(link->li_namelen);
526 READ_BUF(link->li_namelen);
527 SAVEMEM(link->li_name, link->li_namelen);
528 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
529 return status;
530
531 DECODE_TAIL;
532 }
533
534 static __be32
535 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
536 {
537 DECODE_HEAD;
538
539 lock->lk_replay_owner = NULL;
540 /*
541 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
542 */
543 READ_BUF(28);
544 READ32(lock->lk_type);
545 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
546 goto xdr_error;
547 READ32(lock->lk_reclaim);
548 READ64(lock->lk_offset);
549 READ64(lock->lk_length);
550 READ32(lock->lk_is_new);
551
552 if (lock->lk_is_new) {
553 READ_BUF(4);
554 READ32(lock->lk_new_open_seqid);
555 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
556 if (status)
557 return status;
558 READ_BUF(8 + sizeof(clientid_t));
559 READ32(lock->lk_new_lock_seqid);
560 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
561 READ32(lock->lk_new_owner.len);
562 READ_BUF(lock->lk_new_owner.len);
563 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
564 } else {
565 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
566 if (status)
567 return status;
568 READ_BUF(4);
569 READ32(lock->lk_old_lock_seqid);
570 }
571
572 DECODE_TAIL;
573 }
574
575 static __be32
576 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
577 {
578 DECODE_HEAD;
579
580 READ_BUF(32);
581 READ32(lockt->lt_type);
582 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
583 goto xdr_error;
584 READ64(lockt->lt_offset);
585 READ64(lockt->lt_length);
586 COPYMEM(&lockt->lt_clientid, 8);
587 READ32(lockt->lt_owner.len);
588 READ_BUF(lockt->lt_owner.len);
589 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
590
591 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
592 return nfserr_inval;
593 DECODE_TAIL;
594 }
595
596 static __be32
597 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
598 {
599 DECODE_HEAD;
600
601 locku->lu_stateowner = NULL;
602 READ_BUF(8);
603 READ32(locku->lu_type);
604 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
605 goto xdr_error;
606 READ32(locku->lu_seqid);
607 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
608 if (status)
609 return status;
610 READ_BUF(16);
611 READ64(locku->lu_offset);
612 READ64(locku->lu_length);
613
614 DECODE_TAIL;
615 }
616
617 static __be32
618 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
619 {
620 DECODE_HEAD;
621
622 READ_BUF(4);
623 READ32(lookup->lo_len);
624 READ_BUF(lookup->lo_len);
625 SAVEMEM(lookup->lo_name, lookup->lo_len);
626 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
627 return status;
628
629 DECODE_TAIL;
630 }
631
632 static __be32
633 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
634 {
635 DECODE_HEAD;
636
637 memset(open->op_bmval, 0, sizeof(open->op_bmval));
638 open->op_iattr.ia_valid = 0;
639 open->op_stateowner = NULL;
640
641 /* seqid, share_access, share_deny, clientid, ownerlen */
642 READ_BUF(16 + sizeof(clientid_t));
643 READ32(open->op_seqid);
644 READ32(open->op_share_access);
645 READ32(open->op_share_deny);
646 COPYMEM(&open->op_clientid, sizeof(clientid_t));
647 READ32(open->op_owner.len);
648
649 /* owner, open_flag */
650 READ_BUF(open->op_owner.len + 4);
651 SAVEMEM(open->op_owner.data, open->op_owner.len);
652 READ32(open->op_create);
653 switch (open->op_create) {
654 case NFS4_OPEN_NOCREATE:
655 break;
656 case NFS4_OPEN_CREATE:
657 READ_BUF(4);
658 READ32(open->op_createmode);
659 switch (open->op_createmode) {
660 case NFS4_CREATE_UNCHECKED:
661 case NFS4_CREATE_GUARDED:
662 status = nfsd4_decode_fattr(argp, open->op_bmval,
663 &open->op_iattr, &open->op_acl);
664 if (status)
665 goto out;
666 break;
667 case NFS4_CREATE_EXCLUSIVE:
668 READ_BUF(8);
669 COPYMEM(open->op_verf.data, 8);
670 break;
671 case NFS4_CREATE_EXCLUSIVE4_1:
672 if (argp->minorversion < 1)
673 goto xdr_error;
674 READ_BUF(8);
675 COPYMEM(open->op_verf.data, 8);
676 status = nfsd4_decode_fattr(argp, open->op_bmval,
677 &open->op_iattr, &open->op_acl);
678 if (status)
679 goto out;
680 break;
681 default:
682 goto xdr_error;
683 }
684 break;
685 default:
686 goto xdr_error;
687 }
688
689 /* open_claim */
690 READ_BUF(4);
691 READ32(open->op_claim_type);
692 switch (open->op_claim_type) {
693 case NFS4_OPEN_CLAIM_NULL:
694 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
695 READ_BUF(4);
696 READ32(open->op_fname.len);
697 READ_BUF(open->op_fname.len);
698 SAVEMEM(open->op_fname.data, open->op_fname.len);
699 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
700 return status;
701 break;
702 case NFS4_OPEN_CLAIM_PREVIOUS:
703 READ_BUF(4);
704 READ32(open->op_delegate_type);
705 break;
706 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
707 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
708 if (status)
709 return status;
710 READ_BUF(4);
711 READ32(open->op_fname.len);
712 READ_BUF(open->op_fname.len);
713 SAVEMEM(open->op_fname.data, open->op_fname.len);
714 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
715 return status;
716 break;
717 default:
718 goto xdr_error;
719 }
720
721 DECODE_TAIL;
722 }
723
724 static __be32
725 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
726 {
727 DECODE_HEAD;
728
729 open_conf->oc_stateowner = NULL;
730 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
731 if (status)
732 return status;
733 READ_BUF(4);
734 READ32(open_conf->oc_seqid);
735
736 DECODE_TAIL;
737 }
738
739 static __be32
740 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
741 {
742 DECODE_HEAD;
743
744 open_down->od_stateowner = NULL;
745 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
746 if (status)
747 return status;
748 READ_BUF(12);
749 READ32(open_down->od_seqid);
750 READ32(open_down->od_share_access);
751 READ32(open_down->od_share_deny);
752
753 DECODE_TAIL;
754 }
755
756 static __be32
757 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
758 {
759 DECODE_HEAD;
760
761 READ_BUF(4);
762 READ32(putfh->pf_fhlen);
763 if (putfh->pf_fhlen > NFS4_FHSIZE)
764 goto xdr_error;
765 READ_BUF(putfh->pf_fhlen);
766 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
767
768 DECODE_TAIL;
769 }
770
771 static __be32
772 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
773 {
774 DECODE_HEAD;
775
776 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
777 if (status)
778 return status;
779 READ_BUF(12);
780 READ64(read->rd_offset);
781 READ32(read->rd_length);
782
783 DECODE_TAIL;
784 }
785
786 static __be32
787 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
788 {
789 DECODE_HEAD;
790
791 READ_BUF(24);
792 READ64(readdir->rd_cookie);
793 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
794 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
795 READ32(readdir->rd_maxcount);
796 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
797 goto out;
798
799 DECODE_TAIL;
800 }
801
802 static __be32
803 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
804 {
805 DECODE_HEAD;
806
807 READ_BUF(4);
808 READ32(remove->rm_namelen);
809 READ_BUF(remove->rm_namelen);
810 SAVEMEM(remove->rm_name, remove->rm_namelen);
811 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
812 return status;
813
814 DECODE_TAIL;
815 }
816
817 static __be32
818 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
819 {
820 DECODE_HEAD;
821
822 READ_BUF(4);
823 READ32(rename->rn_snamelen);
824 READ_BUF(rename->rn_snamelen + 4);
825 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
826 READ32(rename->rn_tnamelen);
827 READ_BUF(rename->rn_tnamelen);
828 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
829 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
830 return status;
831 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
832 return status;
833
834 DECODE_TAIL;
835 }
836
837 static __be32
838 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
839 {
840 DECODE_HEAD;
841
842 READ_BUF(sizeof(clientid_t));
843 COPYMEM(clientid, sizeof(clientid_t));
844
845 DECODE_TAIL;
846 }
847
848 static __be32
849 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
850 struct nfsd4_secinfo *secinfo)
851 {
852 DECODE_HEAD;
853
854 READ_BUF(4);
855 READ32(secinfo->si_namelen);
856 READ_BUF(secinfo->si_namelen);
857 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
858 status = check_filename(secinfo->si_name, secinfo->si_namelen,
859 nfserr_noent);
860 if (status)
861 return status;
862 DECODE_TAIL;
863 }
864
865 static __be32
866 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
867 struct nfsd4_secinfo_no_name *sin)
868 {
869 DECODE_HEAD;
870
871 READ_BUF(4);
872 READ32(sin->sin_style);
873 DECODE_TAIL;
874 }
875
876 static __be32
877 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
878 {
879 __be32 status;
880
881 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
882 if (status)
883 return status;
884 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
885 &setattr->sa_acl);
886 }
887
888 static __be32
889 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
890 {
891 DECODE_HEAD;
892
893 READ_BUF(12);
894 COPYMEM(setclientid->se_verf.data, 8);
895 READ32(setclientid->se_namelen);
896
897 READ_BUF(setclientid->se_namelen + 8);
898 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
899 READ32(setclientid->se_callback_prog);
900 READ32(setclientid->se_callback_netid_len);
901
902 READ_BUF(setclientid->se_callback_netid_len + 4);
903 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
904 READ32(setclientid->se_callback_addr_len);
905
906 READ_BUF(setclientid->se_callback_addr_len + 4);
907 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
908 READ32(setclientid->se_callback_ident);
909
910 DECODE_TAIL;
911 }
912
913 static __be32
914 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
915 {
916 DECODE_HEAD;
917
918 READ_BUF(8 + sizeof(nfs4_verifier));
919 COPYMEM(&scd_c->sc_clientid, 8);
920 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
921
922 DECODE_TAIL;
923 }
924
925 /* Also used for NVERIFY */
926 static __be32
927 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
928 {
929 #if 0
930 struct nfsd4_compoundargs save = {
931 .p = argp->p,
932 .end = argp->end,
933 .rqstp = argp->rqstp,
934 };
935 u32 ve_bmval[2];
936 struct iattr ve_iattr; /* request */
937 struct nfs4_acl *ve_acl; /* request */
938 #endif
939 DECODE_HEAD;
940
941 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
942 goto out;
943
944 /* For convenience's sake, we compare raw xdr'd attributes in
945 * nfsd4_proc_verify; however we still decode here just to return
946 * correct error in case of bad xdr. */
947 #if 0
948 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
949 if (status == nfserr_inval) {
950 status = nfserrno(status);
951 goto out;
952 }
953 #endif
954 READ_BUF(4);
955 READ32(verify->ve_attrlen);
956 READ_BUF(verify->ve_attrlen);
957 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
958
959 DECODE_TAIL;
960 }
961
962 static __be32
963 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
964 {
965 int avail;
966 int v;
967 int len;
968 DECODE_HEAD;
969
970 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
971 if (status)
972 return status;
973 READ_BUF(16);
974 READ64(write->wr_offset);
975 READ32(write->wr_stable_how);
976 if (write->wr_stable_how > 2)
977 goto xdr_error;
978 READ32(write->wr_buflen);
979
980 /* Sorry .. no magic macros for this.. *
981 * READ_BUF(write->wr_buflen);
982 * SAVEMEM(write->wr_buf, write->wr_buflen);
983 */
984 avail = (char*)argp->end - (char*)argp->p;
985 if (avail + argp->pagelen < write->wr_buflen) {
986 dprintk("NFSD: xdr error (%s:%d)\n",
987 __FILE__, __LINE__);
988 goto xdr_error;
989 }
990 argp->rqstp->rq_vec[0].iov_base = p;
991 argp->rqstp->rq_vec[0].iov_len = avail;
992 v = 0;
993 len = write->wr_buflen;
994 while (len > argp->rqstp->rq_vec[v].iov_len) {
995 len -= argp->rqstp->rq_vec[v].iov_len;
996 v++;
997 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
998 argp->pagelist++;
999 if (argp->pagelen >= PAGE_SIZE) {
1000 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1001 argp->pagelen -= PAGE_SIZE;
1002 } else {
1003 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1004 argp->pagelen -= len;
1005 }
1006 }
1007 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
1008 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
1009 argp->rqstp->rq_vec[v].iov_len = len;
1010 write->wr_vlen = v+1;
1011
1012 DECODE_TAIL;
1013 }
1014
1015 static __be32
1016 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1017 {
1018 DECODE_HEAD;
1019
1020 READ_BUF(12);
1021 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1022 READ32(rlockowner->rl_owner.len);
1023 READ_BUF(rlockowner->rl_owner.len);
1024 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1025
1026 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1027 return nfserr_inval;
1028 DECODE_TAIL;
1029 }
1030
1031 static __be32
1032 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1033 struct nfsd4_exchange_id *exid)
1034 {
1035 int dummy, tmp;
1036 DECODE_HEAD;
1037
1038 READ_BUF(NFS4_VERIFIER_SIZE);
1039 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1040
1041 READ_BUF(4);
1042 READ32(exid->clname.len);
1043
1044 READ_BUF(exid->clname.len);
1045 SAVEMEM(exid->clname.data, exid->clname.len);
1046
1047 READ_BUF(4);
1048 READ32(exid->flags);
1049
1050 /* Ignore state_protect4_a */
1051 READ_BUF(4);
1052 READ32(exid->spa_how);
1053 switch (exid->spa_how) {
1054 case SP4_NONE:
1055 break;
1056 case SP4_MACH_CRED:
1057 /* spo_must_enforce */
1058 READ_BUF(4);
1059 READ32(dummy);
1060 READ_BUF(dummy * 4);
1061 p += dummy;
1062
1063 /* spo_must_allow */
1064 READ_BUF(4);
1065 READ32(dummy);
1066 READ_BUF(dummy * 4);
1067 p += dummy;
1068 break;
1069 case SP4_SSV:
1070 /* ssp_ops */
1071 READ_BUF(4);
1072 READ32(dummy);
1073 READ_BUF(dummy * 4);
1074 p += dummy;
1075
1076 READ_BUF(4);
1077 READ32(dummy);
1078 READ_BUF(dummy * 4);
1079 p += dummy;
1080
1081 /* ssp_hash_algs<> */
1082 READ_BUF(4);
1083 READ32(tmp);
1084 while (tmp--) {
1085 READ_BUF(4);
1086 READ32(dummy);
1087 READ_BUF(dummy);
1088 p += XDR_QUADLEN(dummy);
1089 }
1090
1091 /* ssp_encr_algs<> */
1092 READ_BUF(4);
1093 READ32(tmp);
1094 while (tmp--) {
1095 READ_BUF(4);
1096 READ32(dummy);
1097 READ_BUF(dummy);
1098 p += XDR_QUADLEN(dummy);
1099 }
1100
1101 /* ssp_window and ssp_num_gss_handles */
1102 READ_BUF(8);
1103 READ32(dummy);
1104 READ32(dummy);
1105 break;
1106 default:
1107 goto xdr_error;
1108 }
1109
1110 /* Ignore Implementation ID */
1111 READ_BUF(4); /* nfs_impl_id4 array length */
1112 READ32(dummy);
1113
1114 if (dummy > 1)
1115 goto xdr_error;
1116
1117 if (dummy == 1) {
1118 /* nii_domain */
1119 READ_BUF(4);
1120 READ32(dummy);
1121 READ_BUF(dummy);
1122 p += XDR_QUADLEN(dummy);
1123
1124 /* nii_name */
1125 READ_BUF(4);
1126 READ32(dummy);
1127 READ_BUF(dummy);
1128 p += XDR_QUADLEN(dummy);
1129
1130 /* nii_date */
1131 READ_BUF(12);
1132 p += 3;
1133 }
1134 DECODE_TAIL;
1135 }
1136
1137 static __be32
1138 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1139 struct nfsd4_create_session *sess)
1140 {
1141 DECODE_HEAD;
1142
1143 u32 dummy;
1144 char *machine_name;
1145 int i;
1146 int nr_secflavs;
1147
1148 READ_BUF(16);
1149 COPYMEM(&sess->clientid, 8);
1150 READ32(sess->seqid);
1151 READ32(sess->flags);
1152
1153 /* Fore channel attrs */
1154 READ_BUF(28);
1155 READ32(dummy); /* headerpadsz is always 0 */
1156 READ32(sess->fore_channel.maxreq_sz);
1157 READ32(sess->fore_channel.maxresp_sz);
1158 READ32(sess->fore_channel.maxresp_cached);
1159 READ32(sess->fore_channel.maxops);
1160 READ32(sess->fore_channel.maxreqs);
1161 READ32(sess->fore_channel.nr_rdma_attrs);
1162 if (sess->fore_channel.nr_rdma_attrs == 1) {
1163 READ_BUF(4);
1164 READ32(sess->fore_channel.rdma_attrs);
1165 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1166 dprintk("Too many fore channel attr bitmaps!\n");
1167 goto xdr_error;
1168 }
1169
1170 /* Back channel attrs */
1171 READ_BUF(28);
1172 READ32(dummy); /* headerpadsz is always 0 */
1173 READ32(sess->back_channel.maxreq_sz);
1174 READ32(sess->back_channel.maxresp_sz);
1175 READ32(sess->back_channel.maxresp_cached);
1176 READ32(sess->back_channel.maxops);
1177 READ32(sess->back_channel.maxreqs);
1178 READ32(sess->back_channel.nr_rdma_attrs);
1179 if (sess->back_channel.nr_rdma_attrs == 1) {
1180 READ_BUF(4);
1181 READ32(sess->back_channel.rdma_attrs);
1182 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1183 dprintk("Too many back channel attr bitmaps!\n");
1184 goto xdr_error;
1185 }
1186
1187 READ_BUF(8);
1188 READ32(sess->callback_prog);
1189
1190 /* callback_sec_params4 */
1191 READ32(nr_secflavs);
1192 for (i = 0; i < nr_secflavs; ++i) {
1193 READ_BUF(4);
1194 READ32(dummy);
1195 switch (dummy) {
1196 case RPC_AUTH_NULL:
1197 /* Nothing to read */
1198 break;
1199 case RPC_AUTH_UNIX:
1200 READ_BUF(8);
1201 /* stamp */
1202 READ32(dummy);
1203
1204 /* machine name */
1205 READ32(dummy);
1206 READ_BUF(dummy);
1207 SAVEMEM(machine_name, dummy);
1208
1209 /* uid, gid */
1210 READ_BUF(8);
1211 READ32(sess->uid);
1212 READ32(sess->gid);
1213
1214 /* more gids */
1215 READ_BUF(4);
1216 READ32(dummy);
1217 READ_BUF(dummy * 4);
1218 for (i = 0; i < dummy; ++i)
1219 READ32(dummy);
1220 break;
1221 case RPC_AUTH_GSS:
1222 dprintk("RPC_AUTH_GSS callback secflavor "
1223 "not supported!\n");
1224 READ_BUF(8);
1225 /* gcbp_service */
1226 READ32(dummy);
1227 /* gcbp_handle_from_server */
1228 READ32(dummy);
1229 READ_BUF(dummy);
1230 p += XDR_QUADLEN(dummy);
1231 /* gcbp_handle_from_client */
1232 READ_BUF(4);
1233 READ32(dummy);
1234 READ_BUF(dummy);
1235 p += XDR_QUADLEN(dummy);
1236 break;
1237 default:
1238 dprintk("Illegal callback secflavor\n");
1239 return nfserr_inval;
1240 }
1241 }
1242 DECODE_TAIL;
1243 }
1244
1245 static __be32
1246 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1247 struct nfsd4_destroy_session *destroy_session)
1248 {
1249 DECODE_HEAD;
1250 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1251 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1252
1253 DECODE_TAIL;
1254 }
1255
1256 static __be32
1257 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1258 struct nfsd4_sequence *seq)
1259 {
1260 DECODE_HEAD;
1261
1262 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1263 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1264 READ32(seq->seqid);
1265 READ32(seq->slotid);
1266 READ32(seq->maxslots);
1267 READ32(seq->cachethis);
1268
1269 DECODE_TAIL;
1270 }
1271
1272 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1273 {
1274 DECODE_HEAD;
1275
1276 READ_BUF(4);
1277 READ32(rc->rca_one_fs);
1278
1279 DECODE_TAIL;
1280 }
1281
1282 static __be32
1283 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1284 {
1285 return nfs_ok;
1286 }
1287
1288 static __be32
1289 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1290 {
1291 return nfserr_notsupp;
1292 }
1293
1294 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1295
1296 static nfsd4_dec nfsd4_dec_ops[] = {
1297 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1298 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1299 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1300 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1301 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1302 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1303 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1304 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1305 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1306 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1307 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1308 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1309 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1310 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1311 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1312 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1313 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1314 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1315 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1316 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1317 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1318 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1319 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1320 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1321 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1322 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1323 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1324 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1325 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1326 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1327 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1328 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1329 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1330 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1331 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1332 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1333 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1334 };
1335
1336 static nfsd4_dec nfsd41_dec_ops[] = {
1337 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1338 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1339 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1340 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1341 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1342 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1343 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1344 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1345 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1346 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1347 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1348 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1349 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1350 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1351 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1352 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1353 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1354 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1355 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1356 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1357 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1358 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1359 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1360 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1361 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1362 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1363 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1364 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1365 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1366 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1367 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1368 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1369 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1370 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1371 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1372 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1373 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
1374
1375 /* new operations for NFSv4.1 */
1376 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1377 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1378 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1379 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1380 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1381 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1382 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1383 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1384 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1385 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1386 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1387 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1388 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1389 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1390 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1391 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1392 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1393 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1394 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1395 };
1396
1397 struct nfsd4_minorversion_ops {
1398 nfsd4_dec *decoders;
1399 int nops;
1400 };
1401
1402 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1403 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1404 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1405 };
1406
1407 static __be32
1408 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1409 {
1410 DECODE_HEAD;
1411 struct nfsd4_op *op;
1412 struct nfsd4_minorversion_ops *ops;
1413 int i;
1414
1415 /*
1416 * XXX: According to spec, we should check the tag
1417 * for UTF-8 compliance. I'm postponing this for
1418 * now because it seems that some clients do use
1419 * binary tags.
1420 */
1421 READ_BUF(4);
1422 READ32(argp->taglen);
1423 READ_BUF(argp->taglen + 8);
1424 SAVEMEM(argp->tag, argp->taglen);
1425 READ32(argp->minorversion);
1426 READ32(argp->opcnt);
1427
1428 if (argp->taglen > NFSD4_MAX_TAGLEN)
1429 goto xdr_error;
1430 if (argp->opcnt > 100)
1431 goto xdr_error;
1432
1433 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1434 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1435 if (!argp->ops) {
1436 argp->ops = argp->iops;
1437 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1438 goto xdr_error;
1439 }
1440 }
1441
1442 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1443 argp->opcnt = 0;
1444
1445 ops = &nfsd4_minorversion[argp->minorversion];
1446 for (i = 0; i < argp->opcnt; i++) {
1447 op = &argp->ops[i];
1448 op->replay = NULL;
1449
1450 /*
1451 * We can't use READ_BUF() here because we need to handle
1452 * a missing opcode as an OP_WRITE + 1. So we need to check
1453 * to see if we're truly at the end of our buffer or if there
1454 * is another page we need to flip to.
1455 */
1456
1457 if (argp->p == argp->end) {
1458 if (argp->pagelen < 4) {
1459 /* There isn't an opcode still on the wire */
1460 op->opnum = OP_WRITE + 1;
1461 op->status = nfserr_bad_xdr;
1462 argp->opcnt = i+1;
1463 break;
1464 }
1465
1466 /*
1467 * False alarm. We just hit a page boundary, but there
1468 * is still data available. Move pointer across page
1469 * boundary. *snip from READ_BUF*
1470 */
1471 argp->p = page_address(argp->pagelist[0]);
1472 argp->pagelist++;
1473 if (argp->pagelen < PAGE_SIZE) {
1474 argp->end = argp->p + (argp->pagelen>>2);
1475 argp->pagelen = 0;
1476 } else {
1477 argp->end = argp->p + (PAGE_SIZE>>2);
1478 argp->pagelen -= PAGE_SIZE;
1479 }
1480 }
1481 op->opnum = ntohl(*argp->p++);
1482
1483 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
1484 op->status = ops->decoders[op->opnum](argp, &op->u);
1485 else {
1486 op->opnum = OP_ILLEGAL;
1487 op->status = nfserr_op_illegal;
1488 }
1489
1490 if (op->status) {
1491 argp->opcnt = i+1;
1492 break;
1493 }
1494 }
1495
1496 DECODE_TAIL;
1497 }
1498
1499 #define WRITE32(n) *p++ = htonl(n)
1500 #define WRITE64(n) do { \
1501 *p++ = htonl((u32)((n) >> 32)); \
1502 *p++ = htonl((u32)(n)); \
1503 } while (0)
1504 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1505 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1506 memcpy(p, ptr, nbytes); \
1507 p += XDR_QUADLEN(nbytes); \
1508 }} while (0)
1509
1510 static void write32(__be32 **p, u32 n)
1511 {
1512 *(*p)++ = n;
1513 }
1514
1515 static void write64(__be32 **p, u64 n)
1516 {
1517 write32(p, (u32)(n >> 32));
1518 write32(p, (u32)n);
1519 }
1520
1521 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1522 {
1523 if (IS_I_VERSION(inode)) {
1524 write64(p, inode->i_version);
1525 } else {
1526 write32(p, stat->ctime.tv_sec);
1527 write32(p, stat->ctime.tv_nsec);
1528 }
1529 }
1530
1531 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1532 {
1533 write32(p, c->atomic);
1534 if (c->change_supported) {
1535 write64(p, c->before_change);
1536 write64(p, c->after_change);
1537 } else {
1538 write32(p, c->before_ctime_sec);
1539 write32(p, c->before_ctime_nsec);
1540 write32(p, c->after_ctime_sec);
1541 write32(p, c->after_ctime_nsec);
1542 }
1543 }
1544
1545 #define RESERVE_SPACE(nbytes) do { \
1546 p = resp->p; \
1547 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1548 } while (0)
1549 #define ADJUST_ARGS() resp->p = p
1550
1551 /*
1552 * Header routine to setup seqid operation replay cache
1553 */
1554 #define ENCODE_SEQID_OP_HEAD \
1555 __be32 *save; \
1556 \
1557 save = resp->p;
1558
1559 /*
1560 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1561 * is where sequence id's are incremented, and the replay cache is filled.
1562 * Note that we increment sequence id's here, at the last moment, so we're sure
1563 * we know whether the error to be returned is a sequence id mutating error.
1564 */
1565
1566 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1567 if (seqid_mutating_err(nfserr) && stateowner) { \
1568 stateowner->so_seqid++; \
1569 stateowner->so_replay.rp_status = nfserr; \
1570 stateowner->so_replay.rp_buflen = \
1571 (((char *)(resp)->p - (char *)save)); \
1572 memcpy(stateowner->so_replay.rp_buf, save, \
1573 stateowner->so_replay.rp_buflen); \
1574 } } while (0);
1575
1576 /* Encode as an array of strings the string given with components
1577 * separated @sep.
1578 */
1579 static __be32 nfsd4_encode_components(char sep, char *components,
1580 __be32 **pp, int *buflen)
1581 {
1582 __be32 *p = *pp;
1583 __be32 *countp = p;
1584 int strlen, count=0;
1585 char *str, *end;
1586
1587 dprintk("nfsd4_encode_components(%s)\n", components);
1588 if ((*buflen -= 4) < 0)
1589 return nfserr_resource;
1590 WRITE32(0); /* We will fill this in with @count later */
1591 end = str = components;
1592 while (*end) {
1593 for (; *end && (*end != sep); end++)
1594 ; /* Point to end of component */
1595 strlen = end - str;
1596 if (strlen) {
1597 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1598 return nfserr_resource;
1599 WRITE32(strlen);
1600 WRITEMEM(str, strlen);
1601 count++;
1602 }
1603 else
1604 end++;
1605 str = end;
1606 }
1607 *pp = p;
1608 p = countp;
1609 WRITE32(count);
1610 return 0;
1611 }
1612
1613 /*
1614 * encode a location element of a fs_locations structure
1615 */
1616 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1617 __be32 **pp, int *buflen)
1618 {
1619 __be32 status;
1620 __be32 *p = *pp;
1621
1622 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1623 if (status)
1624 return status;
1625 status = nfsd4_encode_components('/', location->path, &p, buflen);
1626 if (status)
1627 return status;
1628 *pp = p;
1629 return 0;
1630 }
1631
1632 /*
1633 * Return the path to an export point in the pseudo filesystem namespace
1634 * Returned string is safe to use as long as the caller holds a reference
1635 * to @exp.
1636 */
1637 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1638 {
1639 struct svc_fh tmp_fh;
1640 char *path = NULL, *rootpath;
1641 size_t rootlen;
1642
1643 fh_init(&tmp_fh, NFS4_FHSIZE);
1644 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1645 if (*stat)
1646 return NULL;
1647 rootpath = tmp_fh.fh_export->ex_pathname;
1648
1649 path = exp->ex_pathname;
1650
1651 rootlen = strlen(rootpath);
1652 if (strncmp(path, rootpath, rootlen)) {
1653 dprintk("nfsd: fs_locations failed;"
1654 "%s is not contained in %s\n", path, rootpath);
1655 *stat = nfserr_notsupp;
1656 path = NULL;
1657 goto out;
1658 }
1659 path += rootlen;
1660 out:
1661 fh_put(&tmp_fh);
1662 return path;
1663 }
1664
1665 /*
1666 * encode a fs_locations structure
1667 */
1668 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1669 struct svc_export *exp,
1670 __be32 **pp, int *buflen)
1671 {
1672 __be32 status;
1673 int i;
1674 __be32 *p = *pp;
1675 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1676 char *root = nfsd4_path(rqstp, exp, &status);
1677
1678 if (status)
1679 return status;
1680 status = nfsd4_encode_components('/', root, &p, buflen);
1681 if (status)
1682 return status;
1683 if ((*buflen -= 4) < 0)
1684 return nfserr_resource;
1685 WRITE32(fslocs->locations_count);
1686 for (i=0; i<fslocs->locations_count; i++) {
1687 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1688 &p, buflen);
1689 if (status)
1690 return status;
1691 }
1692 *pp = p;
1693 return 0;
1694 }
1695
1696 static u32 nfs4_ftypes[16] = {
1697 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1698 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1699 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1700 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1701 };
1702
1703 static __be32
1704 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1705 __be32 **p, int *buflen)
1706 {
1707 int status;
1708
1709 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1710 return nfserr_resource;
1711 if (whotype != NFS4_ACL_WHO_NAMED)
1712 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1713 else if (group)
1714 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1715 else
1716 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1717 if (status < 0)
1718 return nfserrno(status);
1719 *p = xdr_encode_opaque(*p, NULL, status);
1720 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1721 BUG_ON(*buflen < 0);
1722 return 0;
1723 }
1724
1725 static inline __be32
1726 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1727 {
1728 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1729 }
1730
1731 static inline __be32
1732 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1733 {
1734 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1735 }
1736
1737 static inline __be32
1738 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1739 __be32 **p, int *buflen)
1740 {
1741 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1742 }
1743
1744 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1745 FATTR4_WORD0_RDATTR_ERROR)
1746 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1747
1748 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1749 {
1750 /* As per referral draft: */
1751 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1752 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1753 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1754 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1755 *rdattr_err = NFSERR_MOVED;
1756 else
1757 return nfserr_moved;
1758 }
1759 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1760 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1761 return 0;
1762 }
1763
1764 /*
1765 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1766 * ourselves.
1767 *
1768 * @countp is the buffer size in _words_; upon successful return this becomes
1769 * replaced with the number of words written.
1770 */
1771 __be32
1772 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1773 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1774 struct svc_rqst *rqstp, int ignore_crossmnt)
1775 {
1776 u32 bmval0 = bmval[0];
1777 u32 bmval1 = bmval[1];
1778 u32 bmval2 = bmval[2];
1779 struct kstat stat;
1780 struct svc_fh tempfh;
1781 struct kstatfs statfs;
1782 int buflen = *countp << 2;
1783 __be32 *attrlenp;
1784 u32 dummy;
1785 u64 dummy64;
1786 u32 rdattr_err = 0;
1787 __be32 *p = buffer;
1788 __be32 status;
1789 int err;
1790 int aclsupport = 0;
1791 struct nfs4_acl *acl = NULL;
1792 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1793 u32 minorversion = resp->cstate.minorversion;
1794 struct path path = {
1795 .mnt = exp->ex_path.mnt,
1796 .dentry = dentry,
1797 };
1798
1799 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1800 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1801 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1802 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1803
1804 if (exp->ex_fslocs.migrated) {
1805 BUG_ON(bmval[2]);
1806 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1807 if (status)
1808 goto out;
1809 }
1810
1811 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1812 if (err)
1813 goto out_nfserr;
1814 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1815 FATTR4_WORD0_MAXNAME)) ||
1816 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1817 FATTR4_WORD1_SPACE_TOTAL))) {
1818 err = vfs_statfs(&path, &statfs);
1819 if (err)
1820 goto out_nfserr;
1821 }
1822 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1823 fh_init(&tempfh, NFS4_FHSIZE);
1824 status = fh_compose(&tempfh, exp, dentry, NULL);
1825 if (status)
1826 goto out;
1827 fhp = &tempfh;
1828 }
1829 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1830 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1831 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1832 aclsupport = (err == 0);
1833 if (bmval0 & FATTR4_WORD0_ACL) {
1834 if (err == -EOPNOTSUPP)
1835 bmval0 &= ~FATTR4_WORD0_ACL;
1836 else if (err == -EINVAL) {
1837 status = nfserr_attrnotsupp;
1838 goto out;
1839 } else if (err != 0)
1840 goto out_nfserr;
1841 }
1842 }
1843
1844 if (bmval2) {
1845 if ((buflen -= 16) < 0)
1846 goto out_resource;
1847 WRITE32(3);
1848 WRITE32(bmval0);
1849 WRITE32(bmval1);
1850 WRITE32(bmval2);
1851 } else if (bmval1) {
1852 if ((buflen -= 12) < 0)
1853 goto out_resource;
1854 WRITE32(2);
1855 WRITE32(bmval0);
1856 WRITE32(bmval1);
1857 } else {
1858 if ((buflen -= 8) < 0)
1859 goto out_resource;
1860 WRITE32(1);
1861 WRITE32(bmval0);
1862 }
1863 attrlenp = p++; /* to be backfilled later */
1864
1865 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1866 u32 word0 = nfsd_suppattrs0(minorversion);
1867 u32 word1 = nfsd_suppattrs1(minorversion);
1868 u32 word2 = nfsd_suppattrs2(minorversion);
1869
1870 if (!aclsupport)
1871 word0 &= ~FATTR4_WORD0_ACL;
1872 if (!word2) {
1873 if ((buflen -= 12) < 0)
1874 goto out_resource;
1875 WRITE32(2);
1876 WRITE32(word0);
1877 WRITE32(word1);
1878 } else {
1879 if ((buflen -= 16) < 0)
1880 goto out_resource;
1881 WRITE32(3);
1882 WRITE32(word0);
1883 WRITE32(word1);
1884 WRITE32(word2);
1885 }
1886 }
1887 if (bmval0 & FATTR4_WORD0_TYPE) {
1888 if ((buflen -= 4) < 0)
1889 goto out_resource;
1890 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1891 if (dummy == NF4BAD)
1892 goto out_serverfault;
1893 WRITE32(dummy);
1894 }
1895 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1896 if ((buflen -= 4) < 0)
1897 goto out_resource;
1898 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1899 WRITE32(NFS4_FH_PERSISTENT);
1900 else
1901 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1902 }
1903 if (bmval0 & FATTR4_WORD0_CHANGE) {
1904 if ((buflen -= 8) < 0)
1905 goto out_resource;
1906 write_change(&p, &stat, dentry->d_inode);
1907 }
1908 if (bmval0 & FATTR4_WORD0_SIZE) {
1909 if ((buflen -= 8) < 0)
1910 goto out_resource;
1911 WRITE64(stat.size);
1912 }
1913 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1914 if ((buflen -= 4) < 0)
1915 goto out_resource;
1916 WRITE32(1);
1917 }
1918 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1919 if ((buflen -= 4) < 0)
1920 goto out_resource;
1921 WRITE32(1);
1922 }
1923 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1924 if ((buflen -= 4) < 0)
1925 goto out_resource;
1926 WRITE32(0);
1927 }
1928 if (bmval0 & FATTR4_WORD0_FSID) {
1929 if ((buflen -= 16) < 0)
1930 goto out_resource;
1931 if (exp->ex_fslocs.migrated) {
1932 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1933 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1934 } else switch(fsid_source(fhp)) {
1935 case FSIDSOURCE_FSID:
1936 WRITE64((u64)exp->ex_fsid);
1937 WRITE64((u64)0);
1938 break;
1939 case FSIDSOURCE_DEV:
1940 WRITE32(0);
1941 WRITE32(MAJOR(stat.dev));
1942 WRITE32(0);
1943 WRITE32(MINOR(stat.dev));
1944 break;
1945 case FSIDSOURCE_UUID:
1946 WRITEMEM(exp->ex_uuid, 16);
1947 break;
1948 }
1949 }
1950 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1951 if ((buflen -= 4) < 0)
1952 goto out_resource;
1953 WRITE32(0);
1954 }
1955 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1956 if ((buflen -= 4) < 0)
1957 goto out_resource;
1958 WRITE32(nfsd4_lease);
1959 }
1960 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1961 if ((buflen -= 4) < 0)
1962 goto out_resource;
1963 WRITE32(rdattr_err);
1964 }
1965 if (bmval0 & FATTR4_WORD0_ACL) {
1966 struct nfs4_ace *ace;
1967
1968 if (acl == NULL) {
1969 if ((buflen -= 4) < 0)
1970 goto out_resource;
1971
1972 WRITE32(0);
1973 goto out_acl;
1974 }
1975 if ((buflen -= 4) < 0)
1976 goto out_resource;
1977 WRITE32(acl->naces);
1978
1979 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1980 if ((buflen -= 4*3) < 0)
1981 goto out_resource;
1982 WRITE32(ace->type);
1983 WRITE32(ace->flag);
1984 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1985 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1986 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1987 &p, &buflen);
1988 if (status == nfserr_resource)
1989 goto out_resource;
1990 if (status)
1991 goto out;
1992 }
1993 }
1994 out_acl:
1995 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1996 if ((buflen -= 4) < 0)
1997 goto out_resource;
1998 WRITE32(aclsupport ?
1999 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2000 }
2001 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2002 if ((buflen -= 4) < 0)
2003 goto out_resource;
2004 WRITE32(1);
2005 }
2006 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2007 if ((buflen -= 4) < 0)
2008 goto out_resource;
2009 WRITE32(1);
2010 }
2011 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2012 if ((buflen -= 4) < 0)
2013 goto out_resource;
2014 WRITE32(1);
2015 }
2016 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2017 if ((buflen -= 4) < 0)
2018 goto out_resource;
2019 WRITE32(1);
2020 }
2021 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2022 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2023 if (buflen < 0)
2024 goto out_resource;
2025 WRITE32(fhp->fh_handle.fh_size);
2026 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2027 }
2028 if (bmval0 & FATTR4_WORD0_FILEID) {
2029 if ((buflen -= 8) < 0)
2030 goto out_resource;
2031 WRITE64(stat.ino);
2032 }
2033 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2034 if ((buflen -= 8) < 0)
2035 goto out_resource;
2036 WRITE64((u64) statfs.f_ffree);
2037 }
2038 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2039 if ((buflen -= 8) < 0)
2040 goto out_resource;
2041 WRITE64((u64) statfs.f_ffree);
2042 }
2043 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2044 if ((buflen -= 8) < 0)
2045 goto out_resource;
2046 WRITE64((u64) statfs.f_files);
2047 }
2048 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2049 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2050 if (status == nfserr_resource)
2051 goto out_resource;
2052 if (status)
2053 goto out;
2054 }
2055 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2056 if ((buflen -= 4) < 0)
2057 goto out_resource;
2058 WRITE32(1);
2059 }
2060 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2061 if ((buflen -= 8) < 0)
2062 goto out_resource;
2063 WRITE64(~(u64)0);
2064 }
2065 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2066 if ((buflen -= 4) < 0)
2067 goto out_resource;
2068 WRITE32(255);
2069 }
2070 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2071 if ((buflen -= 4) < 0)
2072 goto out_resource;
2073 WRITE32(statfs.f_namelen);
2074 }
2075 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2076 if ((buflen -= 8) < 0)
2077 goto out_resource;
2078 WRITE64((u64) svc_max_payload(rqstp));
2079 }
2080 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2081 if ((buflen -= 8) < 0)
2082 goto out_resource;
2083 WRITE64((u64) svc_max_payload(rqstp));
2084 }
2085 if (bmval1 & FATTR4_WORD1_MODE) {
2086 if ((buflen -= 4) < 0)
2087 goto out_resource;
2088 WRITE32(stat.mode & S_IALLUGO);
2089 }
2090 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2091 if ((buflen -= 4) < 0)
2092 goto out_resource;
2093 WRITE32(1);
2094 }
2095 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2096 if ((buflen -= 4) < 0)
2097 goto out_resource;
2098 WRITE32(stat.nlink);
2099 }
2100 if (bmval1 & FATTR4_WORD1_OWNER) {
2101 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2102 if (status == nfserr_resource)
2103 goto out_resource;
2104 if (status)
2105 goto out;
2106 }
2107 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2108 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2109 if (status == nfserr_resource)
2110 goto out_resource;
2111 if (status)
2112 goto out;
2113 }
2114 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2115 if ((buflen -= 8) < 0)
2116 goto out_resource;
2117 WRITE32((u32) MAJOR(stat.rdev));
2118 WRITE32((u32) MINOR(stat.rdev));
2119 }
2120 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2121 if ((buflen -= 8) < 0)
2122 goto out_resource;
2123 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2124 WRITE64(dummy64);
2125 }
2126 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2127 if ((buflen -= 8) < 0)
2128 goto out_resource;
2129 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2130 WRITE64(dummy64);
2131 }
2132 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2133 if ((buflen -= 8) < 0)
2134 goto out_resource;
2135 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2136 WRITE64(dummy64);
2137 }
2138 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2139 if ((buflen -= 8) < 0)
2140 goto out_resource;
2141 dummy64 = (u64)stat.blocks << 9;
2142 WRITE64(dummy64);
2143 }
2144 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2145 if ((buflen -= 12) < 0)
2146 goto out_resource;
2147 WRITE32(0);
2148 WRITE32(stat.atime.tv_sec);
2149 WRITE32(stat.atime.tv_nsec);
2150 }
2151 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2152 if ((buflen -= 12) < 0)
2153 goto out_resource;
2154 WRITE32(0);
2155 WRITE32(1);
2156 WRITE32(0);
2157 }
2158 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2159 if ((buflen -= 12) < 0)
2160 goto out_resource;
2161 WRITE32(0);
2162 WRITE32(stat.ctime.tv_sec);
2163 WRITE32(stat.ctime.tv_nsec);
2164 }
2165 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2166 if ((buflen -= 12) < 0)
2167 goto out_resource;
2168 WRITE32(0);
2169 WRITE32(stat.mtime.tv_sec);
2170 WRITE32(stat.mtime.tv_nsec);
2171 }
2172 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2173 if ((buflen -= 8) < 0)
2174 goto out_resource;
2175 /*
2176 * Get parent's attributes if not ignoring crossmount
2177 * and this is the root of a cross-mounted filesystem.
2178 */
2179 if (ignore_crossmnt == 0 &&
2180 dentry == exp->ex_path.mnt->mnt_root) {
2181 struct path path = exp->ex_path;
2182 path_get(&path);
2183 while (follow_up(&path)) {
2184 if (path.dentry != path.mnt->mnt_root)
2185 break;
2186 }
2187 err = vfs_getattr(path.mnt, path.dentry, &stat);
2188 path_put(&path);
2189 if (err)
2190 goto out_nfserr;
2191 }
2192 WRITE64(stat.ino);
2193 }
2194 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2195 WRITE32(3);
2196 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2197 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2198 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2199 }
2200
2201 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2202 *countp = p - buffer;
2203 status = nfs_ok;
2204
2205 out:
2206 kfree(acl);
2207 if (fhp == &tempfh)
2208 fh_put(&tempfh);
2209 return status;
2210 out_nfserr:
2211 status = nfserrno(err);
2212 goto out;
2213 out_resource:
2214 *countp = 0;
2215 status = nfserr_resource;
2216 goto out;
2217 out_serverfault:
2218 status = nfserr_serverfault;
2219 goto out;
2220 }
2221
2222 static inline int attributes_need_mount(u32 *bmval)
2223 {
2224 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2225 return 1;
2226 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2227 return 1;
2228 return 0;
2229 }
2230
2231 static __be32
2232 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2233 const char *name, int namlen, __be32 *p, int *buflen)
2234 {
2235 struct svc_export *exp = cd->rd_fhp->fh_export;
2236 struct dentry *dentry;
2237 __be32 nfserr;
2238 int ignore_crossmnt = 0;
2239
2240 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2241 if (IS_ERR(dentry))
2242 return nfserrno(PTR_ERR(dentry));
2243 if (!dentry->d_inode) {
2244 /*
2245 * nfsd_buffered_readdir drops the i_mutex between
2246 * readdir and calling this callback, leaving a window
2247 * where this directory entry could have gone away.
2248 */
2249 dput(dentry);
2250 return nfserr_noent;
2251 }
2252
2253 exp_get(exp);
2254 /*
2255 * In the case of a mountpoint, the client may be asking for
2256 * attributes that are only properties of the underlying filesystem
2257 * as opposed to the cross-mounted file system. In such a case,
2258 * we will not follow the cross mount and will fill the attribtutes
2259 * directly from the mountpoint dentry.
2260 */
2261 if (nfsd_mountpoint(dentry, exp)) {
2262 int err;
2263
2264 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2265 && !attributes_need_mount(cd->rd_bmval)) {
2266 ignore_crossmnt = 1;
2267 goto out_encode;
2268 }
2269 /*
2270 * Why the heck aren't we just using nfsd_lookup??
2271 * Different "."/".." handling? Something else?
2272 * At least, add a comment here to explain....
2273 */
2274 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2275 if (err) {
2276 nfserr = nfserrno(err);
2277 goto out_put;
2278 }
2279 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2280 if (nfserr)
2281 goto out_put;
2282
2283 }
2284 out_encode:
2285 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2286 cd->rd_rqstp, ignore_crossmnt);
2287 out_put:
2288 dput(dentry);
2289 exp_put(exp);
2290 return nfserr;
2291 }
2292
2293 static __be32 *
2294 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2295 {
2296 __be32 *attrlenp;
2297
2298 if (buflen < 6)
2299 return NULL;
2300 *p++ = htonl(2);
2301 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2302 *p++ = htonl(0); /* bmval1 */
2303
2304 attrlenp = p++;
2305 *p++ = nfserr; /* no htonl */
2306 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2307 return p;
2308 }
2309
2310 static int
2311 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2312 loff_t offset, u64 ino, unsigned int d_type)
2313 {
2314 struct readdir_cd *ccd = ccdv;
2315 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2316 int buflen;
2317 __be32 *p = cd->buffer;
2318 __be32 *cookiep;
2319 __be32 nfserr = nfserr_toosmall;
2320
2321 /* In nfsv4, "." and ".." never make it onto the wire.. */
2322 if (name && isdotent(name, namlen)) {
2323 cd->common.err = nfs_ok;
2324 return 0;
2325 }
2326
2327 if (cd->offset)
2328 xdr_encode_hyper(cd->offset, (u64) offset);
2329
2330 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2331 if (buflen < 0)
2332 goto fail;
2333
2334 *p++ = xdr_one; /* mark entry present */
2335 cookiep = p;
2336 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2337 p = xdr_encode_array(p, name, namlen); /* name length & name */
2338
2339 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2340 switch (nfserr) {
2341 case nfs_ok:
2342 p += buflen;
2343 break;
2344 case nfserr_resource:
2345 nfserr = nfserr_toosmall;
2346 goto fail;
2347 case nfserr_noent:
2348 goto skip_entry;
2349 default:
2350 /*
2351 * If the client requested the RDATTR_ERROR attribute,
2352 * we stuff the error code into this attribute
2353 * and continue. If this attribute was not requested,
2354 * then in accordance with the spec, we fail the
2355 * entire READDIR operation(!)
2356 */
2357 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2358 goto fail;
2359 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2360 if (p == NULL) {
2361 nfserr = nfserr_toosmall;
2362 goto fail;
2363 }
2364 }
2365 cd->buflen -= (p - cd->buffer);
2366 cd->buffer = p;
2367 cd->offset = cookiep;
2368 skip_entry:
2369 cd->common.err = nfs_ok;
2370 return 0;
2371 fail:
2372 cd->common.err = nfserr;
2373 return -EINVAL;
2374 }
2375
2376 static void
2377 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2378 {
2379 __be32 *p;
2380
2381 RESERVE_SPACE(sizeof(stateid_t));
2382 WRITE32(sid->si_generation);
2383 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2384 ADJUST_ARGS();
2385 }
2386
2387 static __be32
2388 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2389 {
2390 __be32 *p;
2391
2392 if (!nfserr) {
2393 RESERVE_SPACE(8);
2394 WRITE32(access->ac_supported);
2395 WRITE32(access->ac_resp_access);
2396 ADJUST_ARGS();
2397 }
2398 return nfserr;
2399 }
2400
2401 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2402 {
2403 __be32 *p;
2404
2405 if (!nfserr) {
2406 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2407 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2408 WRITE32(bcts->dir);
2409 /* XXX: ? */
2410 WRITE32(0);
2411 ADJUST_ARGS();
2412 }
2413 return nfserr;
2414 }
2415
2416 static __be32
2417 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2418 {
2419 ENCODE_SEQID_OP_HEAD;
2420
2421 if (!nfserr)
2422 nfsd4_encode_stateid(resp, &close->cl_stateid);
2423
2424 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2425 return nfserr;
2426 }
2427
2428
2429 static __be32
2430 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2431 {
2432 __be32 *p;
2433
2434 if (!nfserr) {
2435 RESERVE_SPACE(8);
2436 WRITEMEM(commit->co_verf.data, 8);
2437 ADJUST_ARGS();
2438 }
2439 return nfserr;
2440 }
2441
2442 static __be32
2443 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2444 {
2445 __be32 *p;
2446
2447 if (!nfserr) {
2448 RESERVE_SPACE(32);
2449 write_cinfo(&p, &create->cr_cinfo);
2450 WRITE32(2);
2451 WRITE32(create->cr_bmval[0]);
2452 WRITE32(create->cr_bmval[1]);
2453 ADJUST_ARGS();
2454 }
2455 return nfserr;
2456 }
2457
2458 static __be32
2459 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2460 {
2461 struct svc_fh *fhp = getattr->ga_fhp;
2462 int buflen;
2463
2464 if (nfserr)
2465 return nfserr;
2466
2467 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2468 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2469 resp->p, &buflen, getattr->ga_bmval,
2470 resp->rqstp, 0);
2471 if (!nfserr)
2472 resp->p += buflen;
2473 return nfserr;
2474 }
2475
2476 static __be32
2477 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2478 {
2479 struct svc_fh *fhp = *fhpp;
2480 unsigned int len;
2481 __be32 *p;
2482
2483 if (!nfserr) {
2484 len = fhp->fh_handle.fh_size;
2485 RESERVE_SPACE(len + 4);
2486 WRITE32(len);
2487 WRITEMEM(&fhp->fh_handle.fh_base, len);
2488 ADJUST_ARGS();
2489 }
2490 return nfserr;
2491 }
2492
2493 /*
2494 * Including all fields other than the name, a LOCK4denied structure requires
2495 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2496 */
2497 static void
2498 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2499 {
2500 __be32 *p;
2501
2502 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2503 WRITE64(ld->ld_start);
2504 WRITE64(ld->ld_length);
2505 WRITE32(ld->ld_type);
2506 if (ld->ld_sop) {
2507 WRITEMEM(&ld->ld_clientid, 8);
2508 WRITE32(ld->ld_sop->so_owner.len);
2509 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2510 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2511 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2512 WRITE64((u64)0); /* clientid */
2513 WRITE32(0); /* length of owner name */
2514 }
2515 ADJUST_ARGS();
2516 }
2517
2518 static __be32
2519 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2520 {
2521 ENCODE_SEQID_OP_HEAD;
2522
2523 if (!nfserr)
2524 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2525 else if (nfserr == nfserr_denied)
2526 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2527
2528 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2529 return nfserr;
2530 }
2531
2532 static __be32
2533 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2534 {
2535 if (nfserr == nfserr_denied)
2536 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2537 return nfserr;
2538 }
2539
2540 static __be32
2541 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2542 {
2543 ENCODE_SEQID_OP_HEAD;
2544
2545 if (!nfserr)
2546 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2547
2548 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2549 return nfserr;
2550 }
2551
2552
2553 static __be32
2554 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2555 {
2556 __be32 *p;
2557
2558 if (!nfserr) {
2559 RESERVE_SPACE(20);
2560 write_cinfo(&p, &link->li_cinfo);
2561 ADJUST_ARGS();
2562 }
2563 return nfserr;
2564 }
2565
2566
2567 static __be32
2568 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2569 {
2570 __be32 *p;
2571 ENCODE_SEQID_OP_HEAD;
2572
2573 if (nfserr)
2574 goto out;
2575
2576 nfsd4_encode_stateid(resp, &open->op_stateid);
2577 RESERVE_SPACE(40);
2578 write_cinfo(&p, &open->op_cinfo);
2579 WRITE32(open->op_rflags);
2580 WRITE32(2);
2581 WRITE32(open->op_bmval[0]);
2582 WRITE32(open->op_bmval[1]);
2583 WRITE32(open->op_delegate_type);
2584 ADJUST_ARGS();
2585
2586 switch (open->op_delegate_type) {
2587 case NFS4_OPEN_DELEGATE_NONE:
2588 break;
2589 case NFS4_OPEN_DELEGATE_READ:
2590 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2591 RESERVE_SPACE(20);
2592 WRITE32(open->op_recall);
2593
2594 /*
2595 * TODO: ACE's in delegations
2596 */
2597 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2598 WRITE32(0);
2599 WRITE32(0);
2600 WRITE32(0); /* XXX: is NULL principal ok? */
2601 ADJUST_ARGS();
2602 break;
2603 case NFS4_OPEN_DELEGATE_WRITE:
2604 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2605 RESERVE_SPACE(32);
2606 WRITE32(0);
2607
2608 /*
2609 * TODO: space_limit's in delegations
2610 */
2611 WRITE32(NFS4_LIMIT_SIZE);
2612 WRITE32(~(u32)0);
2613 WRITE32(~(u32)0);
2614
2615 /*
2616 * TODO: ACE's in delegations
2617 */
2618 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2619 WRITE32(0);
2620 WRITE32(0);
2621 WRITE32(0); /* XXX: is NULL principal ok? */
2622 ADJUST_ARGS();
2623 break;
2624 default:
2625 BUG();
2626 }
2627 /* XXX save filehandle here */
2628 out:
2629 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2630 return nfserr;
2631 }
2632
2633 static __be32
2634 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2635 {
2636 ENCODE_SEQID_OP_HEAD;
2637
2638 if (!nfserr)
2639 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2640
2641 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2642 return nfserr;
2643 }
2644
2645 static __be32
2646 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2647 {
2648 ENCODE_SEQID_OP_HEAD;
2649
2650 if (!nfserr)
2651 nfsd4_encode_stateid(resp, &od->od_stateid);
2652
2653 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2654 return nfserr;
2655 }
2656
2657 static __be32
2658 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2659 struct nfsd4_read *read)
2660 {
2661 u32 eof;
2662 int v, pn;
2663 unsigned long maxcount;
2664 long len;
2665 __be32 *p;
2666
2667 if (nfserr)
2668 return nfserr;
2669 if (resp->xbuf->page_len)
2670 return nfserr_resource;
2671
2672 RESERVE_SPACE(8); /* eof flag and byte count */
2673
2674 maxcount = svc_max_payload(resp->rqstp);
2675 if (maxcount > read->rd_length)
2676 maxcount = read->rd_length;
2677
2678 len = maxcount;
2679 v = 0;
2680 while (len > 0) {
2681 pn = resp->rqstp->rq_resused++;
2682 resp->rqstp->rq_vec[v].iov_base =
2683 page_address(resp->rqstp->rq_respages[pn]);
2684 resp->rqstp->rq_vec[v].iov_len =
2685 len < PAGE_SIZE ? len : PAGE_SIZE;
2686 v++;
2687 len -= PAGE_SIZE;
2688 }
2689 read->rd_vlen = v;
2690
2691 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2692 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2693 &maxcount);
2694
2695 if (nfserr == nfserr_symlink)
2696 nfserr = nfserr_inval;
2697 if (nfserr)
2698 return nfserr;
2699 eof = (read->rd_offset + maxcount >=
2700 read->rd_fhp->fh_dentry->d_inode->i_size);
2701
2702 WRITE32(eof);
2703 WRITE32(maxcount);
2704 ADJUST_ARGS();
2705 resp->xbuf->head[0].iov_len = (char*)p
2706 - (char*)resp->xbuf->head[0].iov_base;
2707 resp->xbuf->page_len = maxcount;
2708
2709 /* Use rest of head for padding and remaining ops: */
2710 resp->xbuf->tail[0].iov_base = p;
2711 resp->xbuf->tail[0].iov_len = 0;
2712 if (maxcount&3) {
2713 RESERVE_SPACE(4);
2714 WRITE32(0);
2715 resp->xbuf->tail[0].iov_base += maxcount&3;
2716 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2717 ADJUST_ARGS();
2718 }
2719 return 0;
2720 }
2721
2722 static __be32
2723 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2724 {
2725 int maxcount;
2726 char *page;
2727 __be32 *p;
2728
2729 if (nfserr)
2730 return nfserr;
2731 if (resp->xbuf->page_len)
2732 return nfserr_resource;
2733
2734 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2735
2736 maxcount = PAGE_SIZE;
2737 RESERVE_SPACE(4);
2738
2739 /*
2740 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2741 * if they would overflow the buffer. Is this kosher in NFSv4? If
2742 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2743 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2744 */
2745 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2746 if (nfserr == nfserr_isdir)
2747 return nfserr_inval;
2748 if (nfserr)
2749 return nfserr;
2750
2751 WRITE32(maxcount);
2752 ADJUST_ARGS();
2753 resp->xbuf->head[0].iov_len = (char*)p
2754 - (char*)resp->xbuf->head[0].iov_base;
2755 resp->xbuf->page_len = maxcount;
2756
2757 /* Use rest of head for padding and remaining ops: */
2758 resp->xbuf->tail[0].iov_base = p;
2759 resp->xbuf->tail[0].iov_len = 0;
2760 if (maxcount&3) {
2761 RESERVE_SPACE(4);
2762 WRITE32(0);
2763 resp->xbuf->tail[0].iov_base += maxcount&3;
2764 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2765 ADJUST_ARGS();
2766 }
2767 return 0;
2768 }
2769
2770 static __be32
2771 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2772 {
2773 int maxcount;
2774 loff_t offset;
2775 __be32 *page, *savep, *tailbase;
2776 __be32 *p;
2777
2778 if (nfserr)
2779 return nfserr;
2780 if (resp->xbuf->page_len)
2781 return nfserr_resource;
2782
2783 RESERVE_SPACE(8); /* verifier */
2784 savep = p;
2785
2786 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2787 WRITE32(0);
2788 WRITE32(0);
2789 ADJUST_ARGS();
2790 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2791 tailbase = p;
2792
2793 maxcount = PAGE_SIZE;
2794 if (maxcount > readdir->rd_maxcount)
2795 maxcount = readdir->rd_maxcount;
2796
2797 /*
2798 * Convert from bytes to words, account for the two words already
2799 * written, make sure to leave two words at the end for the next
2800 * pointer and eof field.
2801 */
2802 maxcount = (maxcount >> 2) - 4;
2803 if (maxcount < 0) {
2804 nfserr = nfserr_toosmall;
2805 goto err_no_verf;
2806 }
2807
2808 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2809 readdir->common.err = 0;
2810 readdir->buflen = maxcount;
2811 readdir->buffer = page;
2812 readdir->offset = NULL;
2813
2814 offset = readdir->rd_cookie;
2815 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2816 &offset,
2817 &readdir->common, nfsd4_encode_dirent);
2818 if (nfserr == nfs_ok &&
2819 readdir->common.err == nfserr_toosmall &&
2820 readdir->buffer == page)
2821 nfserr = nfserr_toosmall;
2822 if (nfserr == nfserr_symlink)
2823 nfserr = nfserr_notdir;
2824 if (nfserr)
2825 goto err_no_verf;
2826
2827 if (readdir->offset)
2828 xdr_encode_hyper(readdir->offset, offset);
2829
2830 p = readdir->buffer;
2831 *p++ = 0; /* no more entries */
2832 *p++ = htonl(readdir->common.err == nfserr_eof);
2833 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2834 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2835
2836 /* Use rest of head for padding and remaining ops: */
2837 resp->xbuf->tail[0].iov_base = tailbase;
2838 resp->xbuf->tail[0].iov_len = 0;
2839 resp->p = resp->xbuf->tail[0].iov_base;
2840 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2841
2842 return 0;
2843 err_no_verf:
2844 p = savep;
2845 ADJUST_ARGS();
2846 return nfserr;
2847 }
2848
2849 static __be32
2850 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2851 {
2852 __be32 *p;
2853
2854 if (!nfserr) {
2855 RESERVE_SPACE(20);
2856 write_cinfo(&p, &remove->rm_cinfo);
2857 ADJUST_ARGS();
2858 }
2859 return nfserr;
2860 }
2861
2862 static __be32
2863 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2864 {
2865 __be32 *p;
2866
2867 if (!nfserr) {
2868 RESERVE_SPACE(40);
2869 write_cinfo(&p, &rename->rn_sinfo);
2870 write_cinfo(&p, &rename->rn_tinfo);
2871 ADJUST_ARGS();
2872 }
2873 return nfserr;
2874 }
2875
2876 static __be32
2877 nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
2878 __be32 nfserr,struct svc_export *exp)
2879 {
2880 int i = 0;
2881 u32 nflavs;
2882 struct exp_flavor_info *flavs;
2883 struct exp_flavor_info def_flavs[2];
2884 __be32 *p;
2885
2886 if (nfserr)
2887 goto out;
2888 if (exp->ex_nflavors) {
2889 flavs = exp->ex_flavors;
2890 nflavs = exp->ex_nflavors;
2891 } else { /* Handling of some defaults in absence of real secinfo: */
2892 flavs = def_flavs;
2893 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2894 nflavs = 2;
2895 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2896 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2897 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2898 nflavs = 1;
2899 flavs[0].pseudoflavor
2900 = svcauth_gss_flavor(exp->ex_client);
2901 } else {
2902 nflavs = 1;
2903 flavs[0].pseudoflavor
2904 = exp->ex_client->flavour->flavour;
2905 }
2906 }
2907
2908 RESERVE_SPACE(4);
2909 WRITE32(nflavs);
2910 ADJUST_ARGS();
2911 for (i = 0; i < nflavs; i++) {
2912 u32 flav = flavs[i].pseudoflavor;
2913 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2914
2915 if (gm) {
2916 RESERVE_SPACE(4);
2917 WRITE32(RPC_AUTH_GSS);
2918 ADJUST_ARGS();
2919 RESERVE_SPACE(4 + gm->gm_oid.len);
2920 WRITE32(gm->gm_oid.len);
2921 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2922 ADJUST_ARGS();
2923 RESERVE_SPACE(4);
2924 WRITE32(0); /* qop */
2925 ADJUST_ARGS();
2926 RESERVE_SPACE(4);
2927 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2928 ADJUST_ARGS();
2929 gss_mech_put(gm);
2930 } else {
2931 RESERVE_SPACE(4);
2932 WRITE32(flav);
2933 ADJUST_ARGS();
2934 }
2935 }
2936 out:
2937 if (exp)
2938 exp_put(exp);
2939 return nfserr;
2940 }
2941
2942 static __be32
2943 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2944 struct nfsd4_secinfo *secinfo)
2945 {
2946 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
2947 }
2948
2949 static __be32
2950 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
2951 struct nfsd4_secinfo_no_name *secinfo)
2952 {
2953 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
2954 }
2955
2956 /*
2957 * The SETATTR encode routine is special -- it always encodes a bitmap,
2958 * regardless of the error status.
2959 */
2960 static __be32
2961 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2962 {
2963 __be32 *p;
2964
2965 RESERVE_SPACE(12);
2966 if (nfserr) {
2967 WRITE32(2);
2968 WRITE32(0);
2969 WRITE32(0);
2970 }
2971 else {
2972 WRITE32(2);
2973 WRITE32(setattr->sa_bmval[0]);
2974 WRITE32(setattr->sa_bmval[1]);
2975 }
2976 ADJUST_ARGS();
2977 return nfserr;
2978 }
2979
2980 static __be32
2981 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2982 {
2983 __be32 *p;
2984
2985 if (!nfserr) {
2986 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2987 WRITEMEM(&scd->se_clientid, 8);
2988 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2989 ADJUST_ARGS();
2990 }
2991 else if (nfserr == nfserr_clid_inuse) {
2992 RESERVE_SPACE(8);
2993 WRITE32(0);
2994 WRITE32(0);
2995 ADJUST_ARGS();
2996 }
2997 return nfserr;
2998 }
2999
3000 static __be32
3001 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3002 {
3003 __be32 *p;
3004
3005 if (!nfserr) {
3006 RESERVE_SPACE(16);
3007 WRITE32(write->wr_bytes_written);
3008 WRITE32(write->wr_how_written);
3009 WRITEMEM(write->wr_verifier.data, 8);
3010 ADJUST_ARGS();
3011 }
3012 return nfserr;
3013 }
3014
3015 static __be32
3016 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
3017 struct nfsd4_exchange_id *exid)
3018 {
3019 __be32 *p;
3020 char *major_id;
3021 char *server_scope;
3022 int major_id_sz;
3023 int server_scope_sz;
3024 uint64_t minor_id = 0;
3025
3026 if (nfserr)
3027 return nfserr;
3028
3029 major_id = utsname()->nodename;
3030 major_id_sz = strlen(major_id);
3031 server_scope = utsname()->nodename;
3032 server_scope_sz = strlen(server_scope);
3033
3034 RESERVE_SPACE(
3035 8 /* eir_clientid */ +
3036 4 /* eir_sequenceid */ +
3037 4 /* eir_flags */ +
3038 4 /* spr_how (SP4_NONE) */ +
3039 8 /* so_minor_id */ +
3040 4 /* so_major_id.len */ +
3041 (XDR_QUADLEN(major_id_sz) * 4) +
3042 4 /* eir_server_scope.len */ +
3043 (XDR_QUADLEN(server_scope_sz) * 4) +
3044 4 /* eir_server_impl_id.count (0) */);
3045
3046 WRITEMEM(&exid->clientid, 8);
3047 WRITE32(exid->seqid);
3048 WRITE32(exid->flags);
3049
3050 /* state_protect4_r. Currently only support SP4_NONE */
3051 BUG_ON(exid->spa_how != SP4_NONE);
3052 WRITE32(exid->spa_how);
3053
3054 /* The server_owner struct */
3055 WRITE64(minor_id); /* Minor id */
3056 /* major id */
3057 WRITE32(major_id_sz);
3058 WRITEMEM(major_id, major_id_sz);
3059
3060 /* Server scope */
3061 WRITE32(server_scope_sz);
3062 WRITEMEM(server_scope, server_scope_sz);
3063
3064 /* Implementation id */
3065 WRITE32(0); /* zero length nfs_impl_id4 array */
3066 ADJUST_ARGS();
3067 return 0;
3068 }
3069
3070 static __be32
3071 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
3072 struct nfsd4_create_session *sess)
3073 {
3074 __be32 *p;
3075
3076 if (nfserr)
3077 return nfserr;
3078
3079 RESERVE_SPACE(24);
3080 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3081 WRITE32(sess->seqid);
3082 WRITE32(sess->flags);
3083 ADJUST_ARGS();
3084
3085 RESERVE_SPACE(28);
3086 WRITE32(0); /* headerpadsz */
3087 WRITE32(sess->fore_channel.maxreq_sz);
3088 WRITE32(sess->fore_channel.maxresp_sz);
3089 WRITE32(sess->fore_channel.maxresp_cached);
3090 WRITE32(sess->fore_channel.maxops);
3091 WRITE32(sess->fore_channel.maxreqs);
3092 WRITE32(sess->fore_channel.nr_rdma_attrs);
3093 ADJUST_ARGS();
3094
3095 if (sess->fore_channel.nr_rdma_attrs) {
3096 RESERVE_SPACE(4);
3097 WRITE32(sess->fore_channel.rdma_attrs);
3098 ADJUST_ARGS();
3099 }
3100
3101 RESERVE_SPACE(28);
3102 WRITE32(0); /* headerpadsz */
3103 WRITE32(sess->back_channel.maxreq_sz);
3104 WRITE32(sess->back_channel.maxresp_sz);
3105 WRITE32(sess->back_channel.maxresp_cached);
3106 WRITE32(sess->back_channel.maxops);
3107 WRITE32(sess->back_channel.maxreqs);
3108 WRITE32(sess->back_channel.nr_rdma_attrs);
3109 ADJUST_ARGS();
3110
3111 if (sess->back_channel.nr_rdma_attrs) {
3112 RESERVE_SPACE(4);
3113 WRITE32(sess->back_channel.rdma_attrs);
3114 ADJUST_ARGS();
3115 }
3116 return 0;
3117 }
3118
3119 static __be32
3120 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3121 struct nfsd4_destroy_session *destroy_session)
3122 {
3123 return nfserr;
3124 }
3125
3126 __be32
3127 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3128 struct nfsd4_sequence *seq)
3129 {
3130 __be32 *p;
3131
3132 if (nfserr)
3133 return nfserr;
3134
3135 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3136 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3137 WRITE32(seq->seqid);
3138 WRITE32(seq->slotid);
3139 WRITE32(seq->maxslots);
3140 /* For now: target_maxslots = maxslots */
3141 WRITE32(seq->maxslots);
3142 WRITE32(seq->status_flags);
3143
3144 ADJUST_ARGS();
3145 resp->cstate.datap = p; /* DRC cache data pointer */
3146 return 0;
3147 }
3148
3149 static __be32
3150 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3151 {
3152 return nfserr;
3153 }
3154
3155 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3156
3157 /*
3158 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3159 * since we don't need to filter out obsolete ops as this is
3160 * done in the decoding phase.
3161 */
3162 static nfsd4_enc nfsd4_enc_ops[] = {
3163 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3164 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3165 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3166 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3167 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3168 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3169 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3170 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3171 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3172 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3173 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3174 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3175 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3176 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3177 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3178 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3179 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3180 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3181 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3182 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3183 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3184 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3185 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3186 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3187 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3188 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3189 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3190 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3191 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3192 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3193 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3194 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3195 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3196 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3197 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3198 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3199 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3200
3201 /* NFSv4.1 operations */
3202 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3203 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
3204 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3205 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3206 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3207 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3208 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3209 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3210 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3211 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3212 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3213 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3214 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
3215 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3216 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3217 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3218 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3219 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3220 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3221 };
3222
3223 /*
3224 * Calculate the total amount of memory that the compound response has taken
3225 * after encoding the current operation.
3226 *
3227 * pad: add on 8 bytes for the next operation's op_code and status so that
3228 * there is room to cache a failure on the next operation.
3229 *
3230 * Compare this length to the session se_fmaxresp_cached.
3231 *
3232 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3233 * will be at least a page and will therefore hold the xdr_buf head.
3234 */
3235 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3236 {
3237 int status = 0;
3238 struct xdr_buf *xb = &resp->rqstp->rq_res;
3239 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3240 struct nfsd4_session *session = NULL;
3241 struct nfsd4_slot *slot = resp->cstate.slot;
3242 u32 length, tlen = 0, pad = 8;
3243
3244 if (!nfsd4_has_session(&resp->cstate))
3245 return status;
3246
3247 session = resp->cstate.session;
3248 if (session == NULL || slot->sl_cachethis == 0)
3249 return status;
3250
3251 if (resp->opcnt >= args->opcnt)
3252 pad = 0; /* this is the last operation */
3253
3254 if (xb->page_len == 0) {
3255 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3256 } else {
3257 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3258 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3259
3260 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3261 }
3262 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3263 length, xb->page_len, tlen, pad);
3264
3265 if (length <= session->se_fchannel.maxresp_cached)
3266 return status;
3267 else
3268 return nfserr_rep_too_big_to_cache;
3269 }
3270
3271 void
3272 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3273 {
3274 __be32 *statp;
3275 __be32 *p;
3276
3277 RESERVE_SPACE(8);
3278 WRITE32(op->opnum);
3279 statp = p++; /* to be backfilled at the end */
3280 ADJUST_ARGS();
3281
3282 if (op->opnum == OP_ILLEGAL)
3283 goto status;
3284 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3285 !nfsd4_enc_ops[op->opnum]);
3286 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3287 /* nfsd4_check_drc_limit guarantees enough room for error status */
3288 if (!op->status && nfsd4_check_drc_limit(resp))
3289 op->status = nfserr_rep_too_big_to_cache;
3290 status:
3291 /*
3292 * Note: We write the status directly, instead of using WRITE32(),
3293 * since it is already in network byte order.
3294 */
3295 *statp = op->status;
3296 }
3297
3298 /*
3299 * Encode the reply stored in the stateowner reply cache
3300 *
3301 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3302 * previously sent already encoded operation.
3303 *
3304 * called with nfs4_lock_state() held
3305 */
3306 void
3307 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3308 {
3309 __be32 *p;
3310 struct nfs4_replay *rp = op->replay;
3311
3312 BUG_ON(!rp);
3313
3314 RESERVE_SPACE(8);
3315 WRITE32(op->opnum);
3316 *p++ = rp->rp_status; /* already xdr'ed */
3317 ADJUST_ARGS();
3318
3319 RESERVE_SPACE(rp->rp_buflen);
3320 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3321 ADJUST_ARGS();
3322 }
3323
3324 int
3325 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3326 {
3327 return xdr_ressize_check(rqstp, p);
3328 }
3329
3330 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3331 {
3332 if (args->ops != args->iops) {
3333 kfree(args->ops);
3334 args->ops = args->iops;
3335 }
3336 kfree(args->tmpp);
3337 args->tmpp = NULL;
3338 while (args->to_free) {
3339 struct tmpbuf *tb = args->to_free;
3340 args->to_free = tb->next;
3341 tb->release(tb->buf);
3342 kfree(tb);
3343 }
3344 }
3345
3346 int
3347 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3348 {
3349 __be32 status;
3350
3351 args->p = p;
3352 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3353 args->pagelist = rqstp->rq_arg.pages;
3354 args->pagelen = rqstp->rq_arg.page_len;
3355 args->tmpp = NULL;
3356 args->to_free = NULL;
3357 args->ops = args->iops;
3358 args->rqstp = rqstp;
3359
3360 status = nfsd4_decode_compound(args);
3361 if (status) {
3362 nfsd4_release_compoundargs(args);
3363 }
3364 return !status;
3365 }
3366
3367 int
3368 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3369 {
3370 /*
3371 * All that remains is to write the tag and operation count...
3372 */
3373 struct nfsd4_compound_state *cs = &resp->cstate;
3374 struct kvec *iov;
3375 p = resp->tagp;
3376 *p++ = htonl(resp->taglen);
3377 memcpy(p, resp->tag, resp->taglen);
3378 p += XDR_QUADLEN(resp->taglen);
3379 *p++ = htonl(resp->opcnt);
3380
3381 if (rqstp->rq_res.page_len)
3382 iov = &rqstp->rq_res.tail[0];
3383 else
3384 iov = &rqstp->rq_res.head[0];
3385 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3386 BUG_ON(iov->iov_len > PAGE_SIZE);
3387 if (nfsd4_has_session(cs)) {
3388 if (cs->status != nfserr_replay_cache) {
3389 nfsd4_store_cache_entry(resp);
3390 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3391 cs->slot->sl_inuse = false;
3392 }
3393 /* Renew the clientid on success and on replay */
3394 release_session_client(cs->session);
3395 nfsd4_put_session(cs->session);
3396 }
3397 return 1;
3398 }
3399
3400 /*
3401 * Local variables:
3402 * c-basic-offset: 8
3403 * End:
3404 */
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