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nfsd41: match clientid establishment method
[people/ms/linux.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
43#include <linux/param.h>
44#include <linux/smp.h>
1da177e4
LT		 45#include <linux/fs.h>
46#include <linux/namei.h>
47#include <linux/vfs.h>
0733d213 48#include <linux/utsname.h>
1da177e4
LT		 49#include <linux/sunrpc/xdr.h>
50#include <linux/sunrpc/svc.h>
51#include <linux/sunrpc/clnt.h>
52#include <linux/nfsd/nfsd.h>
53#include <linux/nfsd/state.h>
54#include <linux/nfsd/xdr4.h>
55#include <linux/nfsd_idmap.h>
56#include <linux/nfs4.h>
57#include <linux/nfs4_acl.h>
dcb488a3 58#include <linux/sunrpc/gss_api.h>
4796f457 59#include <linux/sunrpc/svcauth_gss.h>
1da177e4
LT		 60
61#define NFSDDBG_FACILITY NFSDDBG_XDR
62
42ca0993
BF		 63/*
64 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
65 * directory in order to indicate to the client that a filesystem boundary is present
66 * We use a fixed fsid for a referral
67 */
68#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
69#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
70
b37ad28b
AV		 71static __be32
72check_filename(char *str, int len, __be32 err)
1da177e4
LT		 73{
74 int i;
75
76 if (len == 0)
77 return nfserr_inval;
78 if (isdotent(str, len))
79 return err;
80 for (i = 0; i < len; i++)
81 if (str[i] == '/')
82 return err;
83 return 0;
84}
85
86/*
87 * START OF "GENERIC" DECODE ROUTINES.
88 * These may look a little ugly since they are imported from a "generic"
89 * set of XDR encode/decode routines which are intended to be shared by
90 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
91 *
92 * If the pain of reading these is too great, it should be a straightforward
93 * task to translate them into Linux-specific versions which are more
94 * consistent with the style used in NFSv2/v3...
95 */
96#define DECODE_HEAD \
2ebbc012 97 __be32 *p; \
b37ad28b 98 __be32 status
1da177e4
LT		 99#define DECODE_TAIL \
100 status = 0; \
101out: \
102 return status; \
103xdr_error: \
817cb9d4
CL		 104 dprintk("NFSD: xdr error (%s:%d)\n", \
105 __FILE__, __LINE__); \
1da177e4
LT		 106 status = nfserr_bad_xdr; \
107 goto out
108
109#define READ32(x) (x) = ntohl(*p++)
110#define READ64(x) do { \
111 (x) = (u64)ntohl(*p++) << 32; \
112 (x) |= ntohl(*p++); \
113} while (0)
114#define READTIME(x) do { \
115 p++; \
116 (x) = ntohl(*p++); \
117 p++; \
118} while (0)
119#define READMEM(x,nbytes) do { \
120 x = (char *)p; \
121 p += XDR_QUADLEN(nbytes); \
122} while (0)
123#define SAVEMEM(x,nbytes) do { \
124 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
125 savemem(argp, p, nbytes) : \
126 (char *)p)) { \
817cb9d4
CL		 127 dprintk("NFSD: xdr error (%s:%d)\n", \
128 __FILE__, __LINE__); \
1da177e4
LT		 129 goto xdr_error; \
130 } \
131 p += XDR_QUADLEN(nbytes); \
132} while (0)
133#define COPYMEM(x,nbytes) do { \
134 memcpy((x), p, nbytes); \
135 p += XDR_QUADLEN(nbytes); \
136} while (0)
137
138/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
139#define READ_BUF(nbytes) do { \
140 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
141 p = argp->p; \
142 argp->p += XDR_QUADLEN(nbytes); \
143 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 144 dprintk("NFSD: xdr error (%s:%d)\n", \
145 __FILE__, __LINE__); \
1da177e4
LT		 146 goto xdr_error; \
147 } \
148} while (0)
149
ca2a05aa 150static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 151{
152 /* We want more bytes than seem to be available.
153 * Maybe we need a new page, maybe we have just run out
154 */
ca2a05aa 155 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 156 __be32 *p;
1da177e4
LT		 157 if (avail + argp->pagelen < nbytes)
158 return NULL;
159 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
160 return NULL;
161 /* ok, we can do it with the current plus the next page */
162 if (nbytes <= sizeof(argp->tmp))
163 p = argp->tmp;
164 else {
f99d49ad 165 kfree(argp->tmpp);
1da177e4
LT		 166 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
167 if (!p)
168 return NULL;
169
170 }
ca2a05aa
BF		 171 /*
172 * The following memcpy is safe because read_buf is always
173 * called with nbytes > avail, and the two cases above both
174 * guarantee p points to at least nbytes bytes.
175 */
1da177e4
LT		 176 memcpy(p, argp->p, avail);
177 /* step to next page */
178 argp->p = page_address(argp->pagelist[0]);
179 argp->pagelist++;
180 if (argp->pagelen < PAGE_SIZE) {
181 argp->end = p + (argp->pagelen>>2);
182 argp->pagelen = 0;
183 } else {
184 argp->end = p + (PAGE_SIZE>>2);
185 argp->pagelen -= PAGE_SIZE;
186 }
187 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
188 argp->p += XDR_QUADLEN(nbytes - avail);
189 return p;
190}
191
192static int
193defer_free(struct nfsd4_compoundargs *argp,
194 void (*release)(const void *), void *p)
195{
196 struct tmpbuf *tb;
197
198 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
199 if (!tb)
200 return -ENOMEM;
201 tb->buf = p;
202 tb->release = release;
203 tb->next = argp->to_free;
204 argp->to_free = tb;
205 return 0;
206}
207
2ebbc012 208static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 209{
1da177e4 210 if (p == argp->tmp) {
a4db5fe5
BF		 211 p = kmalloc(nbytes, GFP_KERNEL);
212 if (!p)
213 return NULL;
1da177e4
LT		 214 memcpy(p, argp->tmp, nbytes);
215 } else {
73dff8be 216 BUG_ON(p != argp->tmpp);
1da177e4
LT		 217 argp->tmpp = NULL;
218 }
219 if (defer_free(argp, kfree, p)) {
a4db5fe5 220 kfree(p);
1da177e4
LT		 221 return NULL;
222 } else
223 return (char *)p;
224}
225
b37ad28b 226static __be32
1da177e4
LT		 227nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
228{
229 u32 bmlen;
230 DECODE_HEAD;
231
232 bmval[0] = 0;
233 bmval[1] = 0;
234
235 READ_BUF(4);
236 READ32(bmlen);
237 if (bmlen > 1000)
238 goto xdr_error;
239
240 READ_BUF(bmlen << 2);
241 if (bmlen > 0)
242 READ32(bmval[0]);
243 if (bmlen > 1)
244 READ32(bmval[1]);
245
246 DECODE_TAIL;
247}
248
b37ad28b 249static __be32
1da177e4
LT		 250nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
251 struct nfs4_acl **acl)
252{
253 int expected_len, len = 0;
254 u32 dummy32;
255 char *buf;
b8dd7b9a 256 int host_err;
1da177e4
LT		 257
258 DECODE_HEAD;
259 iattr->ia_valid = 0;
260 if ((status = nfsd4_decode_bitmap(argp, bmval)))
261 return status;
262
263 /*
f34f9242 264 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP;
1da177e4
LT		 265 * read-only attributes return ERR_INVAL.
266 */
267 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
268 return nfserr_attrnotsupp;
269 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
270 return nfserr_inval;
271
272 READ_BUF(4);
273 READ32(expected_len);
274
275 if (bmval[0] & FATTR4_WORD0_SIZE) {
276 READ_BUF(8);
277 len += 8;
278 READ64(iattr->ia_size);
279 iattr->ia_valid |= ATTR_SIZE;
280 }
281 if (bmval[0] & FATTR4_WORD0_ACL) {
28e05dd8
BF		 282 int nace;
283 struct nfs4_ace *ace;
1da177e4
LT		 284
285 READ_BUF(4); len += 4;
286 READ32(nace);
287
28e05dd8
BF		 288 if (nace > NFS4_ACL_MAX)
289 return nfserr_resource;
290
291 *acl = nfs4_acl_new(nace);
1da177e4 292 if (*acl == NULL) {
b8dd7b9a 293 host_err = -ENOMEM;
1da177e4
LT		 294 goto out_nfserr;
295 }
28e05dd8 296 defer_free(argp, kfree, *acl);
1da177e4 297
28e05dd8
BF		 298 (*acl)->naces = nace;
299 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 300 READ_BUF(16); len += 16;
28e05dd8
BF		 301 READ32(ace->type);
302 READ32(ace->flag);
303 READ32(ace->access_mask);
1da177e4
LT		 304 READ32(dummy32);
305 READ_BUF(dummy32);
306 len += XDR_QUADLEN(dummy32) << 2;
307 READMEM(buf, dummy32);
28e05dd8 308 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
b8dd7b9a 309 host_err = 0;
28e05dd8
BF		 310 if (ace->whotype != NFS4_ACL_WHO_NAMED)
311 ace->who = 0;
312 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
b8dd7b9a 313 host_err = nfsd_map_name_to_gid(argp->rqstp,
28e05dd8 314 buf, dummy32, &ace->who);
1da177e4 315 else
b8dd7b9a 316 host_err = nfsd_map_name_to_uid(argp->rqstp,
28e05dd8 317 buf, dummy32, &ace->who);
b8dd7b9a 318 if (host_err)
1da177e4 319 goto out_nfserr;
1da177e4
LT		 320 }
321 } else
322 *acl = NULL;
323 if (bmval[1] & FATTR4_WORD1_MODE) {
324 READ_BUF(4);
325 len += 4;
326 READ32(iattr->ia_mode);
327 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
328 iattr->ia_valid |= ATTR_MODE;
329 }
330 if (bmval[1] & FATTR4_WORD1_OWNER) {
331 READ_BUF(4);
332 len += 4;
333 READ32(dummy32);
334 READ_BUF(dummy32);
335 len += (XDR_QUADLEN(dummy32) << 2);
336 READMEM(buf, dummy32);
b8dd7b9a 337 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
1da177e4
LT		 338 goto out_nfserr;
339 iattr->ia_valid |= ATTR_UID;
340 }
341 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
342 READ_BUF(4);
343 len += 4;
344 READ32(dummy32);
345 READ_BUF(dummy32);
346 len += (XDR_QUADLEN(dummy32) << 2);
347 READMEM(buf, dummy32);
b8dd7b9a 348 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
1da177e4
LT		 349 goto out_nfserr;
350 iattr->ia_valid |= ATTR_GID;
351 }
352 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
353 READ_BUF(4);
354 len += 4;
355 READ32(dummy32);
356 switch (dummy32) {
357 case NFS4_SET_TO_CLIENT_TIME:
358 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
359 all 32 bits of 'nseconds'. */
360 READ_BUF(12);
361 len += 12;
362 READ32(dummy32);
363 if (dummy32)
364 return nfserr_inval;
365 READ32(iattr->ia_atime.tv_sec);
366 READ32(iattr->ia_atime.tv_nsec);
367 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
368 return nfserr_inval;
369 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
370 break;
371 case NFS4_SET_TO_SERVER_TIME:
372 iattr->ia_valid |= ATTR_ATIME;
373 break;
374 default:
375 goto xdr_error;
376 }
377 }
1da177e4
LT		 378 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
379 READ_BUF(4);
380 len += 4;
381 READ32(dummy32);
382 switch (dummy32) {
383 case NFS4_SET_TO_CLIENT_TIME:
384 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
385 all 32 bits of 'nseconds'. */
386 READ_BUF(12);
387 len += 12;
388 READ32(dummy32);
389 if (dummy32)
390 return nfserr_inval;
391 READ32(iattr->ia_mtime.tv_sec);
392 READ32(iattr->ia_mtime.tv_nsec);
393 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
394 return nfserr_inval;
395 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
396 break;
397 case NFS4_SET_TO_SERVER_TIME:
398 iattr->ia_valid |= ATTR_MTIME;
399 break;
400 default:
401 goto xdr_error;
402 }
403 }
404 if (len != expected_len)
405 goto xdr_error;
406
407 DECODE_TAIL;
408
409out_nfserr:
b8dd7b9a 410 status = nfserrno(host_err);
1da177e4
LT		 411 goto out;
412}
413
e31a1b66
BH		 414static __be32
415nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
416{
417 DECODE_HEAD;
418
419 READ_BUF(sizeof(stateid_t));
420 READ32(sid->si_generation);
421 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
422
423 DECODE_TAIL;
424}
425
b37ad28b 426static __be32
1da177e4
LT		 427nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
428{
429 DECODE_HEAD;
430
431 READ_BUF(4);
432 READ32(access->ac_req_access);
433
434 DECODE_TAIL;
435}
436
b37ad28b 437static __be32
1da177e4
LT		 438nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
439{
440 DECODE_HEAD;
441
442 close->cl_stateowner = NULL;
e31a1b66 443 READ_BUF(4);
1da177e4 444 READ32(close->cl_seqid);
e31a1b66 445 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 446
447 DECODE_TAIL;
448}
449
450
b37ad28b 451static __be32
1da177e4
LT		 452nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
453{
454 DECODE_HEAD;
455
456 READ_BUF(12);
457 READ64(commit->co_offset);
458 READ32(commit->co_count);
459
460 DECODE_TAIL;
461}
462
b37ad28b 463static __be32
1da177e4
LT		 464nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
465{
466 DECODE_HEAD;
467
468 READ_BUF(4);
469 READ32(create->cr_type);
470 switch (create->cr_type) {
471 case NF4LNK:
472 READ_BUF(4);
473 READ32(create->cr_linklen);
474 READ_BUF(create->cr_linklen);
475 SAVEMEM(create->cr_linkname, create->cr_linklen);
476 break;
477 case NF4BLK:
478 case NF4CHR:
479 READ_BUF(8);
480 READ32(create->cr_specdata1);
481 READ32(create->cr_specdata2);
482 break;
483 case NF4SOCK:
484 case NF4FIFO:
485 case NF4DIR:
486 default:
487 break;
488 }
489
490 READ_BUF(4);
491 READ32(create->cr_namelen);
492 READ_BUF(create->cr_namelen);
493 SAVEMEM(create->cr_name, create->cr_namelen);
494 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
495 return status;
496
497 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
498 goto out;
499
500 DECODE_TAIL;
501}
502
b37ad28b 503static inline __be32
1da177e4
LT		 504nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
505{
e31a1b66 506 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 507}
508
b37ad28b 509static inline __be32
1da177e4
LT		 510nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
511{
512 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
513}
514
b37ad28b 515static __be32
1da177e4
LT		 516nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
517{
518 DECODE_HEAD;
519
520 READ_BUF(4);
521 READ32(link->li_namelen);
522 READ_BUF(link->li_namelen);
523 SAVEMEM(link->li_name, link->li_namelen);
524 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
525 return status;
526
527 DECODE_TAIL;
528}
529
b37ad28b 530static __be32
1da177e4
LT		 531nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
532{
533 DECODE_HEAD;
534
3a65588a 535 lock->lk_replay_owner = NULL;
1da177e4
LT		 536 /*
537 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
538 */
539 READ_BUF(28);
540 READ32(lock->lk_type);
541 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
542 goto xdr_error;
543 READ32(lock->lk_reclaim);
544 READ64(lock->lk_offset);
545 READ64(lock->lk_length);
546 READ32(lock->lk_is_new);
547
548 if (lock->lk_is_new) {
e31a1b66 549 READ_BUF(4);
1da177e4 550 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 551 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
552 if (status)
553 return status;
554 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 555 READ32(lock->lk_new_lock_seqid);
556 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
557 READ32(lock->lk_new_owner.len);
558 READ_BUF(lock->lk_new_owner.len);
559 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
560 } else {
e31a1b66
BH		 561 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
562 if (status)
563 return status;
564 READ_BUF(4);
1da177e4
LT		 565 READ32(lock->lk_old_lock_seqid);
566 }
567
568 DECODE_TAIL;
569}
570
b37ad28b 571static __be32
1da177e4
LT		 572nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
573{
574 DECODE_HEAD;
575
576 READ_BUF(32);
577 READ32(lockt->lt_type);
578 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
579 goto xdr_error;
580 READ64(lockt->lt_offset);
581 READ64(lockt->lt_length);
582 COPYMEM(&lockt->lt_clientid, 8);
583 READ32(lockt->lt_owner.len);
584 READ_BUF(lockt->lt_owner.len);
585 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
586
587 DECODE_TAIL;
588}
589
b37ad28b 590static __be32
1da177e4
LT		 591nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
592{
593 DECODE_HEAD;
594
595 locku->lu_stateowner = NULL;
e31a1b66 596 READ_BUF(8);
1da177e4
LT		 597 READ32(locku->lu_type);
598 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
599 goto xdr_error;
600 READ32(locku->lu_seqid);
e31a1b66
BH		 601 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
602 if (status)
603 return status;
604 READ_BUF(16);
1da177e4
LT		 605 READ64(locku->lu_offset);
606 READ64(locku->lu_length);
607
608 DECODE_TAIL;
609}
610
b37ad28b 611static __be32
1da177e4
LT		 612nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
613{
614 DECODE_HEAD;
615
616 READ_BUF(4);
617 READ32(lookup->lo_len);
618 READ_BUF(lookup->lo_len);
619 SAVEMEM(lookup->lo_name, lookup->lo_len);
620 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
621 return status;
622
623 DECODE_TAIL;
624}
625
b37ad28b 626static __be32
1da177e4
LT		 627nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
628{
629 DECODE_HEAD;
630
631 memset(open->op_bmval, 0, sizeof(open->op_bmval));
632 open->op_iattr.ia_valid = 0;
633 open->op_stateowner = NULL;
634
635 /* seqid, share_access, share_deny, clientid, ownerlen */
636 READ_BUF(16 + sizeof(clientid_t));
637 READ32(open->op_seqid);
638 READ32(open->op_share_access);
639 READ32(open->op_share_deny);
640 COPYMEM(&open->op_clientid, sizeof(clientid_t));
641 READ32(open->op_owner.len);
642
643 /* owner, open_flag */
644 READ_BUF(open->op_owner.len + 4);
645 SAVEMEM(open->op_owner.data, open->op_owner.len);
646 READ32(open->op_create);
647 switch (open->op_create) {
648 case NFS4_OPEN_NOCREATE:
649 break;
650 case NFS4_OPEN_CREATE:
651 READ_BUF(4);
652 READ32(open->op_createmode);
653 switch (open->op_createmode) {
654 case NFS4_CREATE_UNCHECKED:
655 case NFS4_CREATE_GUARDED:
656 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
657 goto out;
658 break;
659 case NFS4_CREATE_EXCLUSIVE:
660 READ_BUF(8);
661 COPYMEM(open->op_verf.data, 8);
662 break;
663 default:
664 goto xdr_error;
665 }
666 break;
667 default:
668 goto xdr_error;
669 }
670
671 /* open_claim */
672 READ_BUF(4);
673 READ32(open->op_claim_type);
674 switch (open->op_claim_type) {
675 case NFS4_OPEN_CLAIM_NULL:
676 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
677 READ_BUF(4);
678 READ32(open->op_fname.len);
679 READ_BUF(open->op_fname.len);
680 SAVEMEM(open->op_fname.data, open->op_fname.len);
681 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
682 return status;
683 break;
684 case NFS4_OPEN_CLAIM_PREVIOUS:
685 READ_BUF(4);
686 READ32(open->op_delegate_type);
687 break;
688 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 689 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
690 if (status)
691 return status;
692 READ_BUF(4);
1da177e4
LT		 693 READ32(open->op_fname.len);
694 READ_BUF(open->op_fname.len);
695 SAVEMEM(open->op_fname.data, open->op_fname.len);
696 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
697 return status;
698 break;
699 default:
700 goto xdr_error;
701 }
702
703 DECODE_TAIL;
704}
705
b37ad28b 706static __be32
1da177e4
LT		 707nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
708{
709 DECODE_HEAD;
710
711 open_conf->oc_stateowner = NULL;
e31a1b66
BH		 712 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
713 if (status)
714 return status;
715 READ_BUF(4);
1da177e4
LT		 716 READ32(open_conf->oc_seqid);
717
718 DECODE_TAIL;
719}
720
b37ad28b 721static __be32
1da177e4
LT		 722nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
723{
724 DECODE_HEAD;
725
726 open_down->od_stateowner = NULL;
e31a1b66
BH		 727 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
728 if (status)
729 return status;
730 READ_BUF(12);
1da177e4
LT		 731 READ32(open_down->od_seqid);
732 READ32(open_down->od_share_access);
733 READ32(open_down->od_share_deny);
734
735 DECODE_TAIL;
736}
737
b37ad28b 738static __be32
1da177e4
LT		 739nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
740{
741 DECODE_HEAD;
742
743 READ_BUF(4);
744 READ32(putfh->pf_fhlen);
745 if (putfh->pf_fhlen > NFS4_FHSIZE)
746 goto xdr_error;
747 READ_BUF(putfh->pf_fhlen);
748 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
749
750 DECODE_TAIL;
751}
752
b37ad28b 753static __be32
1da177e4
LT		 754nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
755{
756 DECODE_HEAD;
757
e31a1b66
BH		 758 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
759 if (status)
760 return status;
761 READ_BUF(12);
1da177e4
LT		 762 READ64(read->rd_offset);
763 READ32(read->rd_length);
764
765 DECODE_TAIL;
766}
767
b37ad28b 768static __be32
1da177e4
LT		 769nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
770{
771 DECODE_HEAD;
772
773 READ_BUF(24);
774 READ64(readdir->rd_cookie);
775 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
776 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
777 READ32(readdir->rd_maxcount);
778 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
779 goto out;
780
781 DECODE_TAIL;
782}
783
b37ad28b 784static __be32
1da177e4
LT		 785nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
786{
787 DECODE_HEAD;
788
789 READ_BUF(4);
790 READ32(remove->rm_namelen);
791 READ_BUF(remove->rm_namelen);
792 SAVEMEM(remove->rm_name, remove->rm_namelen);
793 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
794 return status;
795
796 DECODE_TAIL;
797}
798
b37ad28b 799static __be32
1da177e4
LT		 800nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
801{
802 DECODE_HEAD;
803
804 READ_BUF(4);
805 READ32(rename->rn_snamelen);
806 READ_BUF(rename->rn_snamelen + 4);
807 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
808 READ32(rename->rn_tnamelen);
809 READ_BUF(rename->rn_tnamelen);
810 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
811 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
812 return status;
813 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
814 return status;
815
816 DECODE_TAIL;
817}
818
b37ad28b 819static __be32
1da177e4
LT		 820nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
821{
822 DECODE_HEAD;
823
824 READ_BUF(sizeof(clientid_t));
825 COPYMEM(clientid, sizeof(clientid_t));
826
827 DECODE_TAIL;
828}
829
dcb488a3
AA		 830static __be32
831nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
832 struct nfsd4_secinfo *secinfo)
833{
834 DECODE_HEAD;
835
836 READ_BUF(4);
837 READ32(secinfo->si_namelen);
838 READ_BUF(secinfo->si_namelen);
839 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
840 status = check_filename(secinfo->si_name, secinfo->si_namelen,
841 nfserr_noent);
842 if (status)
843 return status;
844 DECODE_TAIL;
845}
846
b37ad28b 847static __be32
1da177e4
LT		 848nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
849{
e31a1b66 850 __be32 status;
1da177e4 851
e31a1b66
BH		 852 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
853 if (status)
854 return status;
855 return nfsd4_decode_fattr(argp, setattr->sa_bmval,
856 &setattr->sa_iattr, &setattr->sa_acl);
1da177e4
LT		 857}
858
b37ad28b 859static __be32
1da177e4
LT		 860nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
861{
862 DECODE_HEAD;
863
864 READ_BUF(12);
865 COPYMEM(setclientid->se_verf.data, 8);
866 READ32(setclientid->se_namelen);
867
868 READ_BUF(setclientid->se_namelen + 8);
869 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
870 READ32(setclientid->se_callback_prog);
871 READ32(setclientid->se_callback_netid_len);
872
873 READ_BUF(setclientid->se_callback_netid_len + 4);
874 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
875 READ32(setclientid->se_callback_addr_len);
876
877 READ_BUF(setclientid->se_callback_addr_len + 4);
878 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
879 READ32(setclientid->se_callback_ident);
880
881 DECODE_TAIL;
882}
883
b37ad28b 884static __be32
1da177e4
LT		 885nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
886{
887 DECODE_HEAD;
888
889 READ_BUF(8 + sizeof(nfs4_verifier));
890 COPYMEM(&scd_c->sc_clientid, 8);
891 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
892
893 DECODE_TAIL;
894}
895
896/* Also used for NVERIFY */
b37ad28b 897static __be32
1da177e4
LT		 898nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
899{
900#if 0
901 struct nfsd4_compoundargs save = {
902 .p = argp->p,
903 .end = argp->end,
904 .rqstp = argp->rqstp,
905 };
906 u32 ve_bmval[2];
907 struct iattr ve_iattr; /* request */
908 struct nfs4_acl *ve_acl; /* request */
909#endif
910 DECODE_HEAD;
911
912 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
913 goto out;
914
915 /* For convenience's sake, we compare raw xdr'd attributes in
916 * nfsd4_proc_verify; however we still decode here just to return
917 * correct error in case of bad xdr. */
918#if 0
919 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
920 if (status == nfserr_inval) {
921 status = nfserrno(status);
922 goto out;
923 }
924#endif
925 READ_BUF(4);
926 READ32(verify->ve_attrlen);
927 READ_BUF(verify->ve_attrlen);
928 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
929
930 DECODE_TAIL;
931}
932
b37ad28b 933static __be32
1da177e4
LT		 934nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
935{
936 int avail;
937 int v;
938 int len;
939 DECODE_HEAD;
940
e31a1b66
BH		 941 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
942 if (status)
943 return status;
944 READ_BUF(16);
1da177e4
LT		 945 READ64(write->wr_offset);
946 READ32(write->wr_stable_how);
947 if (write->wr_stable_how > 2)
948 goto xdr_error;
949 READ32(write->wr_buflen);
950
951 /* Sorry .. no magic macros for this.. *
952 * READ_BUF(write->wr_buflen);
953 * SAVEMEM(write->wr_buf, write->wr_buflen);
954 */
955 avail = (char*)argp->end - (char*)argp->p;
956 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 957 dprintk("NFSD: xdr error (%s:%d)\n",
958 __FILE__, __LINE__);
1da177e4
LT		 959 goto xdr_error;
960 }
3cc03b16
N		 961 argp->rqstp->rq_vec[0].iov_base = p;
962 argp->rqstp->rq_vec[0].iov_len = avail;
1da177e4
LT		 963 v = 0;
964 len = write->wr_buflen;
3cc03b16
N		 965 while (len > argp->rqstp->rq_vec[v].iov_len) {
966 len -= argp->rqstp->rq_vec[v].iov_len;
1da177e4 967 v++;
3cc03b16 968 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1da177e4
LT		 969 argp->pagelist++;
970 if (argp->pagelen >= PAGE_SIZE) {
3cc03b16 971 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1da177e4
LT		 972 argp->pagelen -= PAGE_SIZE;
973 } else {
3cc03b16 974 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1da177e4
LT		 975 argp->pagelen -= len;
976 }
977 }
2ebbc012
AV		 978 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
979 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
3cc03b16 980 argp->rqstp->rq_vec[v].iov_len = len;
1da177e4
LT		 981 write->wr_vlen = v+1;
982
983 DECODE_TAIL;
984}
985
b37ad28b 986static __be32
1da177e4
LT		 987nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
988{
989 DECODE_HEAD;
990
991 READ_BUF(12);
992 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
993 READ32(rlockowner->rl_owner.len);
994 READ_BUF(rlockowner->rl_owner.len);
995 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
996
997 DECODE_TAIL;
998}
999
2db134eb
AA		 1000static __be32
1001nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1002 struct nfsd4_exchange_id *exid)
2db134eb 1003{
0733d213
AA		 1004 int dummy;
1005 DECODE_HEAD;
1006
1007 READ_BUF(NFS4_VERIFIER_SIZE);
1008 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1009
1010 READ_BUF(4);
1011 READ32(exid->clname.len);
1012
1013 READ_BUF(exid->clname.len);
1014 SAVEMEM(exid->clname.data, exid->clname.len);
1015
1016 READ_BUF(4);
1017 READ32(exid->flags);
1018
1019 /* Ignore state_protect4_a */
1020 READ_BUF(4);
1021 READ32(exid->spa_how);
1022 switch (exid->spa_how) {
1023 case SP4_NONE:
1024 break;
1025 case SP4_MACH_CRED:
1026 /* spo_must_enforce */
1027 READ_BUF(4);
1028 READ32(dummy);
1029 READ_BUF(dummy * 4);
1030 p += dummy;
1031
1032 /* spo_must_allow */
1033 READ_BUF(4);
1034 READ32(dummy);
1035 READ_BUF(dummy * 4);
1036 p += dummy;
1037 break;
1038 case SP4_SSV:
1039 /* ssp_ops */
1040 READ_BUF(4);
1041 READ32(dummy);
1042 READ_BUF(dummy * 4);
1043 p += dummy;
1044
1045 READ_BUF(4);
1046 READ32(dummy);
1047 READ_BUF(dummy * 4);
1048 p += dummy;
1049
1050 /* ssp_hash_algs<> */
1051 READ_BUF(4);
1052 READ32(dummy);
1053 READ_BUF(dummy);
1054 p += XDR_QUADLEN(dummy);
1055
1056 /* ssp_encr_algs<> */
1057 READ_BUF(4);
1058 READ32(dummy);
1059 READ_BUF(dummy);
1060 p += XDR_QUADLEN(dummy);
1061
1062 /* ssp_window and ssp_num_gss_handles */
1063 READ_BUF(8);
1064 READ32(dummy);
1065 READ32(dummy);
1066 break;
1067 default:
1068 goto xdr_error;
1069 }
1070
1071 /* Ignore Implementation ID */
1072 READ_BUF(4); /* nfs_impl_id4 array length */
1073 READ32(dummy);
1074
1075 if (dummy > 1)
1076 goto xdr_error;
1077
1078 if (dummy == 1) {
1079 /* nii_domain */
1080 READ_BUF(4);
1081 READ32(dummy);
1082 READ_BUF(dummy);
1083 p += XDR_QUADLEN(dummy);
1084
1085 /* nii_name */
1086 READ_BUF(4);
1087 READ32(dummy);
1088 READ_BUF(dummy);
1089 p += XDR_QUADLEN(dummy);
1090
1091 /* nii_date */
1092 READ_BUF(12);
1093 p += 3;
1094 }
1095 DECODE_TAIL;
2db134eb
AA		 1096}
1097
1098static __be32
1099nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1100 struct nfsd4_create_session *sess)
1101{
1102 return nfserr_opnotsupp; /* stub */
1103}
1104
1105static __be32
1106nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1107 struct nfsd4_destroy_session *destroy_session)
1108{
1109 return nfserr_opnotsupp; /* stub */
1110}
1111
1112static __be32
1113nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1114 struct nfsd4_sequence *seq)
1115{
1116 return nfserr_opnotsupp; /* stub */
1117}
1118
347e0ad9
BH		 1119static __be32
1120nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1121{
1122 return nfs_ok;
1123}
1124
3c375c6f
BH		 1125static __be32
1126nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1127{
1e685ec2 1128 return nfserr_notsupp;
3c375c6f
BH		 1129}
1130
347e0ad9
BH		 1131typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1132
1133static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1134 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1135 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1136 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1137 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1138 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1139 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1140 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1141 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1142 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1143 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1144 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1145 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1146 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1147 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1148 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1149 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1150 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1151 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1152 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1153 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
a1c8c4d1 1154 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
ad1060c8
BF		 1155 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1156 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1157 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1158 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1159 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1160 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1161 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1162 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1163 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1164 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1165 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1166 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1167 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1168 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1169 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1170 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
347e0ad9
BH		 1171};
1172
2db134eb
AA		 1173static nfsd4_dec nfsd41_dec_ops[] = {
1174 [OP_ACCESS] (nfsd4_dec)nfsd4_decode_access,
1175 [OP_CLOSE] (nfsd4_dec)nfsd4_decode_close,
1176 [OP_COMMIT] (nfsd4_dec)nfsd4_decode_commit,
1177 [OP_CREATE] (nfsd4_dec)nfsd4_decode_create,
1178 [OP_DELEGPURGE] (nfsd4_dec)nfsd4_decode_notsupp,
1179 [OP_DELEGRETURN] (nfsd4_dec)nfsd4_decode_delegreturn,
1180 [OP_GETATTR] (nfsd4_dec)nfsd4_decode_getattr,
1181 [OP_GETFH] (nfsd4_dec)nfsd4_decode_noop,
1182 [OP_LINK] (nfsd4_dec)nfsd4_decode_link,
1183 [OP_LOCK] (nfsd4_dec)nfsd4_decode_lock,
1184 [OP_LOCKT] (nfsd4_dec)nfsd4_decode_lockt,
1185 [OP_LOCKU] (nfsd4_dec)nfsd4_decode_locku,
1186 [OP_LOOKUP] (nfsd4_dec)nfsd4_decode_lookup,
1187 [OP_LOOKUPP] (nfsd4_dec)nfsd4_decode_noop,
1188 [OP_NVERIFY] (nfsd4_dec)nfsd4_decode_verify,
1189 [OP_OPEN] (nfsd4_dec)nfsd4_decode_open,
1190 [OP_OPENATTR] (nfsd4_dec)nfsd4_decode_notsupp,
1191 [OP_OPEN_CONFIRM] (nfsd4_dec)nfsd4_decode_notsupp,
1192 [OP_OPEN_DOWNGRADE] (nfsd4_dec)nfsd4_decode_open_downgrade,
1193 [OP_PUTFH] (nfsd4_dec)nfsd4_decode_putfh,
1194 [OP_PUTPUBFH] (nfsd4_dec)nfsd4_decode_notsupp,
1195 [OP_PUTROOTFH] (nfsd4_dec)nfsd4_decode_noop,
1196 [OP_READ] (nfsd4_dec)nfsd4_decode_read,
1197 [OP_READDIR] (nfsd4_dec)nfsd4_decode_readdir,
1198 [OP_READLINK] (nfsd4_dec)nfsd4_decode_noop,
1199 [OP_REMOVE] (nfsd4_dec)nfsd4_decode_remove,
1200 [OP_RENAME] (nfsd4_dec)nfsd4_decode_rename,
1201 [OP_RENEW] (nfsd4_dec)nfsd4_decode_notsupp,
1202 [OP_RESTOREFH] (nfsd4_dec)nfsd4_decode_noop,
1203 [OP_SAVEFH] (nfsd4_dec)nfsd4_decode_noop,
1204 [OP_SECINFO] (nfsd4_dec)nfsd4_decode_secinfo,
1205 [OP_SETATTR] (nfsd4_dec)nfsd4_decode_setattr,
1206 [OP_SETCLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1207 [OP_SETCLIENTID_CONFIRM](nfsd4_dec)nfsd4_decode_notsupp,
1208 [OP_VERIFY] (nfsd4_dec)nfsd4_decode_verify,
1209 [OP_WRITE] (nfsd4_dec)nfsd4_decode_write,
1210 [OP_RELEASE_LOCKOWNER] (nfsd4_dec)nfsd4_decode_notsupp,
1211
1212 /* new operations for NFSv4.1 */
1213 [OP_BACKCHANNEL_CTL] (nfsd4_dec)nfsd4_decode_notsupp,
1214 [OP_BIND_CONN_TO_SESSION](nfsd4_dec)nfsd4_decode_notsupp,
1215 [OP_EXCHANGE_ID] (nfsd4_dec)nfsd4_decode_exchange_id,
1216 [OP_CREATE_SESSION] (nfsd4_dec)nfsd4_decode_create_session,
1217 [OP_DESTROY_SESSION] (nfsd4_dec)nfsd4_decode_destroy_session,
1218 [OP_FREE_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1219 [OP_GET_DIR_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1220 [OP_GETDEVICEINFO] (nfsd4_dec)nfsd4_decode_notsupp,
1221 [OP_GETDEVICELIST] (nfsd4_dec)nfsd4_decode_notsupp,
1222 [OP_LAYOUTCOMMIT] (nfsd4_dec)nfsd4_decode_notsupp,
1223 [OP_LAYOUTGET] (nfsd4_dec)nfsd4_decode_notsupp,
1224 [OP_LAYOUTRETURN] (nfsd4_dec)nfsd4_decode_notsupp,
1225 [OP_SECINFO_NO_NAME] (nfsd4_dec)nfsd4_decode_notsupp,
1226 [OP_SEQUENCE] (nfsd4_dec)nfsd4_decode_sequence,
1227 [OP_SET_SSV] (nfsd4_dec)nfsd4_decode_notsupp,
1228 [OP_TEST_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1229 [OP_WANT_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1230 [OP_DESTROY_CLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1231 [OP_RECLAIM_COMPLETE] (nfsd4_dec)nfsd4_decode_notsupp,
1232};
1233
f2feb96b
BH		 1234struct nfsd4_minorversion_ops {
1235 nfsd4_dec *decoders;
1236 int nops;
1237};
1238
1239static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
ad1060c8 1240 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
2db134eb 1241 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
f2feb96b
BH		 1242};
1243
b37ad28b 1244static __be32
1da177e4
LT		 1245nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1246{
1247 DECODE_HEAD;
1248 struct nfsd4_op *op;
f2feb96b 1249 struct nfsd4_minorversion_ops *ops;
1da177e4
LT		 1250 int i;
1251
1252 /*
1253 * XXX: According to spec, we should check the tag
1254 * for UTF-8 compliance. I'm postponing this for
1255 * now because it seems that some clients do use
1256 * binary tags.
1257 */
1258 READ_BUF(4);
1259 READ32(argp->taglen);
1260 READ_BUF(argp->taglen + 8);
1261 SAVEMEM(argp->tag, argp->taglen);
1262 READ32(argp->minorversion);
1263 READ32(argp->opcnt);
1264
1265 if (argp->taglen > NFSD4_MAX_TAGLEN)
1266 goto xdr_error;
1267 if (argp->opcnt > 100)
1268 goto xdr_error;
1269
e8c96f8c 1270 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1271 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1272 if (!argp->ops) {
1273 argp->ops = argp->iops;
817cb9d4 1274 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1275 goto xdr_error;
1276 }
1277 }
1278
f2feb96b 1279 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
30cff1ff
BH		 1280 argp->opcnt = 0;
1281
f2feb96b 1282 ops = &nfsd4_minorversion[argp->minorversion];
1da177e4
LT		 1283 for (i = 0; i < argp->opcnt; i++) {
1284 op = &argp->ops[i];
1285 op->replay = NULL;
1286
1287 /*
1288 * We can't use READ_BUF() here because we need to handle
1289 * a missing opcode as an OP_WRITE + 1. So we need to check
1290 * to see if we're truly at the end of our buffer or if there
1291 * is another page we need to flip to.
1292 */
1293
1294 if (argp->p == argp->end) {
1295 if (argp->pagelen < 4) {
1296 /* There isn't an opcode still on the wire */
1297 op->opnum = OP_WRITE + 1;
1298 op->status = nfserr_bad_xdr;
1299 argp->opcnt = i+1;
1300 break;
1301 }
1302
1303 /*
1304 * False alarm. We just hit a page boundary, but there
1305 * is still data available. Move pointer across page
1306 * boundary. *snip from READ_BUF*
1307 */
1308 argp->p = page_address(argp->pagelist[0]);
1309 argp->pagelist++;
1310 if (argp->pagelen < PAGE_SIZE) {
1311 argp->end = p + (argp->pagelen>>2);
1312 argp->pagelen = 0;
1313 } else {
1314 argp->end = p + (PAGE_SIZE>>2);
1315 argp->pagelen -= PAGE_SIZE;
1316 }
1317 }
1318 op->opnum = ntohl(*argp->p++);
1319
f2feb96b
BH		 1320 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1321 op->status = ops->decoders[op->opnum](argp, &op->u);
347e0ad9 1322 else {
1da177e4
LT		 1323 op->opnum = OP_ILLEGAL;
1324 op->status = nfserr_op_illegal;
1da177e4
LT		 1325 }
1326
1327 if (op->status) {
1328 argp->opcnt = i+1;
1329 break;
1330 }
1331 }
1332
1333 DECODE_TAIL;
1334}
1335/*
1336 * END OF "GENERIC" DECODE ROUTINES.
1337 */
1338
1339/*
1340 * START OF "GENERIC" ENCODE ROUTINES.
1341 * These may look a little ugly since they are imported from a "generic"
1342 * set of XDR encode/decode routines which are intended to be shared by
1343 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1344 *
1345 * If the pain of reading these is too great, it should be a straightforward
1346 * task to translate them into Linux-specific versions which are more
1347 * consistent with the style used in NFSv2/v3...
1348 */
2ebbc012 1349#define ENCODE_HEAD __be32 *p
1da177e4
LT		 1350
1351#define WRITE32(n) *p++ = htonl(n)
1352#define WRITE64(n) do { \
1353 *p++ = htonl((u32)((n) >> 32)); \
1354 *p++ = htonl((u32)(n)); \
1355} while (0)
5108b276 1356#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1357 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1358 memcpy(p, ptr, nbytes); \
1359 p += XDR_QUADLEN(nbytes); \
5108b276 1360}} while (0)
1da177e4
LT		 1361#define WRITECINFO(c) do { \
1362 *p++ = htonl(c.atomic); \
1363 *p++ = htonl(c.before_ctime_sec); \
1364 *p++ = htonl(c.before_ctime_nsec); \
1365 *p++ = htonl(c.after_ctime_sec); \
1366 *p++ = htonl(c.after_ctime_nsec); \
1367} while (0)
1368
1369#define RESERVE_SPACE(nbytes) do { \
1370 p = resp->p; \
1371 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1372} while (0)
1373#define ADJUST_ARGS() resp->p = p
1374
1375/*
1376 * Header routine to setup seqid operation replay cache
1377 */
1378#define ENCODE_SEQID_OP_HEAD \
2ebbc012 1379 __be32 *save; \
1da177e4
LT		 1380 \
1381 save = resp->p;
1382
1383/*
7fb64cee
N		 1384 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1385 * is where sequence id's are incremented, and the replay cache is filled.
1386 * Note that we increment sequence id's here, at the last moment, so we're sure
1387 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1388 */
1389
1390#define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1391 if (seqid_mutating_err(nfserr) && stateowner) { \
bd9aac52 1392 stateowner->so_seqid++; \
1da177e4
LT		 1393 stateowner->so_replay.rp_status = nfserr; \
1394 stateowner->so_replay.rp_buflen = \
1395 (((char *)(resp)->p - (char *)save)); \
1396 memcpy(stateowner->so_replay.rp_buf, save, \
1397 stateowner->so_replay.rp_buflen); \
1398 } } while (0);
1399
81c3f413
BF		 1400/* Encode as an array of strings the string given with components
1401 * seperated @sep.
1402 */
b37ad28b 1403static __be32 nfsd4_encode_components(char sep, char *components,
2ebbc012 1404 __be32 **pp, int *buflen)
81c3f413 1405{
2ebbc012
AV		 1406 __be32 *p = *pp;
1407 __be32 *countp = p;
81c3f413
BF		 1408 int strlen, count=0;
1409 char *str, *end;
1410
1411 dprintk("nfsd4_encode_components(%s)\n", components);
1412 if ((*buflen -= 4) < 0)
1413 return nfserr_resource;
1414 WRITE32(0); /* We will fill this in with @count later */
1415 end = str = components;
1416 while (*end) {
1417 for (; *end && (*end != sep); end++)
1418 ; /* Point to end of component */
1419 strlen = end - str;
1420 if (strlen) {
1421 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1422 return nfserr_resource;
1423 WRITE32(strlen);
1424 WRITEMEM(str, strlen);
1425 count++;
1426 }
1427 else
1428 end++;
1429 str = end;
1430 }
1431 *pp = p;
1432 p = countp;
1433 WRITE32(count);
1434 return 0;
1435}
1436
1437/*
1438 * encode a location element of a fs_locations structure
1439 */
b37ad28b 1440static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1441 __be32 **pp, int *buflen)
81c3f413 1442{
b37ad28b 1443 __be32 status;
2ebbc012 1444 __be32 *p = *pp;
81c3f413
BF		 1445
1446 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1447 if (status)
1448 return status;
1449 status = nfsd4_encode_components('/', location->path, &p, buflen);
1450 if (status)
1451 return status;
1452 *pp = p;
1453 return 0;
1454}
1455
1456/*
1457 * Return the path to an export point in the pseudo filesystem namespace
1458 * Returned string is safe to use as long as the caller holds a reference
1459 * to @exp.
1460 */
b37ad28b 1461static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
81c3f413
BF		 1462{
1463 struct svc_fh tmp_fh;
1464 char *path, *rootpath;
81c3f413
BF		 1465
1466 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb 1467 *stat = exp_pseudoroot(rqstp, &tmp_fh);
cc45f017
AV		 1468 if (*stat)
1469 return NULL;
54775491 1470 rootpath = tmp_fh.fh_export->ex_pathname;
81c3f413 1471
54775491 1472 path = exp->ex_pathname;
81c3f413
BF		 1473
1474 if (strncmp(path, rootpath, strlen(rootpath))) {
817cb9d4 1475 dprintk("nfsd: fs_locations failed;"
81c3f413 1476 "%s is not contained in %s\n", path, rootpath);
cc45f017
AV		 1477 *stat = nfserr_notsupp;
1478 return NULL;
81c3f413
BF		 1479 }
1480
1481 return path + strlen(rootpath);
1482}
1483
1484/*
1485 * encode a fs_locations structure
1486 */
b37ad28b 1487static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1488 struct svc_export *exp,
2ebbc012 1489 __be32 **pp, int *buflen)
81c3f413 1490{
b37ad28b 1491 __be32 status;
cc45f017 1492 int i;
2ebbc012 1493 __be32 *p = *pp;
81c3f413 1494 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
cc45f017 1495 char *root = nfsd4_path(rqstp, exp, &status);
81c3f413 1496
cc45f017
AV		 1497 if (status)
1498 return status;
81c3f413
BF		 1499 status = nfsd4_encode_components('/', root, &p, buflen);
1500 if (status)
1501 return status;
1502 if ((*buflen -= 4) < 0)
1503 return nfserr_resource;
1504 WRITE32(fslocs->locations_count);
1505 for (i=0; i<fslocs->locations_count; i++) {
1506 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1507 &p, buflen);
1508 if (status)
1509 return status;
1510 }
1511 *pp = p;
1512 return 0;
1513}
1da177e4
LT		 1514
1515static u32 nfs4_ftypes[16] = {
1516 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1517 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1518 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1519 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1520};
1521
b37ad28b 1522static __be32
1da177e4 1523nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1524 __be32 **p, int *buflen)
1da177e4
LT		 1525{
1526 int status;
1527
1528 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1529 return nfserr_resource;
1530 if (whotype != NFS4_ACL_WHO_NAMED)
1531 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1532 else if (group)
1533 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1534 else
1535 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1536 if (status < 0)
1537 return nfserrno(status);
1538 *p = xdr_encode_opaque(*p, NULL, status);
1539 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1540 BUG_ON(*buflen < 0);
1541 return 0;
1542}
1543
b37ad28b 1544static inline __be32
2ebbc012 1545nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1da177e4
LT		 1546{
1547 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1548}
1549
b37ad28b 1550static inline __be32
2ebbc012 1551nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1da177e4
LT		 1552{
1553 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1554}
1555
b37ad28b 1556static inline __be32
1da177e4 1557nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1558 __be32 **p, int *buflen)
1da177e4
LT		 1559{
1560 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1561}
1562
42ca0993
BF		 1563#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1564 FATTR4_WORD0_RDATTR_ERROR)
1565#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1566
b37ad28b 1567static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1568{
1569 /* As per referral draft: */
1570 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1571 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1572 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1573 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1574 *rdattr_err = NFSERR_MOVED;
1575 else
1576 return nfserr_moved;
1577 }
1578 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1579 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1580 return 0;
1581}
1da177e4
LT		 1582
1583/*
1584 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1585 * ourselves.
1586 *
1587 * @countp is the buffer size in _words_; upon successful return this becomes
1588 * replaced with the number of words written.
1589 */
b37ad28b 1590__be32
1da177e4 1591nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2ebbc012 1592 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
406a7ea9 1593 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 1594{
1595 u32 bmval0 = bmval[0];
1596 u32 bmval1 = bmval[1];
1597 struct kstat stat;
1598 struct svc_fh tempfh;
1599 struct kstatfs statfs;
1600 int buflen = *countp << 2;
2ebbc012 1601 __be32 *attrlenp;
1da177e4
LT		 1602 u32 dummy;
1603 u64 dummy64;
42ca0993 1604 u32 rdattr_err = 0;
2ebbc012 1605 __be32 *p = buffer;
b37ad28b 1606 __be32 status;
b8dd7b9a 1607 int err;
1da177e4
LT		 1608 int aclsupport = 0;
1609 struct nfs4_acl *acl = NULL;
1610
1611 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1612 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1613 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1614
42ca0993
BF		 1615 if (exp->ex_fslocs.migrated) {
1616 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1617 if (status)
1618 goto out;
1619 }
1620
54775491 1621 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
b8dd7b9a 1622 if (err)
1da177e4 1623 goto out_nfserr;
a16e92ed
BF		 1624 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1625 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 1626 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1627 FATTR4_WORD1_SPACE_TOTAL))) {
b8dd7b9a
AV		 1628 err = vfs_statfs(dentry, &statfs);
1629 if (err)
1da177e4
LT		 1630 goto out_nfserr;
1631 }
1632 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1633 fh_init(&tempfh, NFS4_FHSIZE);
1634 status = fh_compose(&tempfh, exp, dentry, NULL);
1635 if (status)
1636 goto out;
1637 fhp = &tempfh;
1638 }
1639 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1640 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 1641 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1642 aclsupport = (err == 0);
1da177e4 1643 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 1644 if (err == -EOPNOTSUPP)
1da177e4 1645 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 1646 else if (err == -EINVAL) {
1da177e4
LT		 1647 status = nfserr_attrnotsupp;
1648 goto out;
b8dd7b9a 1649 } else if (err != 0)
1da177e4
LT		 1650 goto out_nfserr;
1651 }
1652 }
81c3f413
BF		 1653 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1654 if (exp->ex_fslocs.locations == NULL) {
1655 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1656 }
1657 }
1da177e4
LT		 1658 if ((buflen -= 16) < 0)
1659 goto out_resource;
1660
1661 WRITE32(2);
1662 WRITE32(bmval0);
1663 WRITE32(bmval1);
1664 attrlenp = p++; /* to be backfilled later */
1665
1666 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
42ca0993 1667 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1da177e4
LT		 1668 if ((buflen -= 12) < 0)
1669 goto out_resource;
42ca0993
BF		 1670 if (!aclsupport)
1671 word0 &= ~FATTR4_WORD0_ACL;
1672 if (!exp->ex_fslocs.locations)
1673 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1da177e4 1674 WRITE32(2);
42ca0993 1675 WRITE32(word0);
1da177e4
LT		 1676 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1677 }
1678 if (bmval0 & FATTR4_WORD0_TYPE) {
1679 if ((buflen -= 4) < 0)
1680 goto out_resource;
1681 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1682 if (dummy == NF4BAD)
1683 goto out_serverfault;
1684 WRITE32(dummy);
1685 }
1686 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1687 if ((buflen -= 4) < 0)
1688 goto out_resource;
49640001 1689 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 1690 WRITE32(NFS4_FH_PERSISTENT);
49640001 1691 else
e34ac862 1692 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 1693 }
1694 if (bmval0 & FATTR4_WORD0_CHANGE) {
1695 /*
1696 * Note: This _must_ be consistent with the scheme for writing
1697 * change_info, so any changes made here must be reflected there
1698 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1699 * macro above.)
1700 */
1701 if ((buflen -= 8) < 0)
1702 goto out_resource;
1703 WRITE32(stat.ctime.tv_sec);
1704 WRITE32(stat.ctime.tv_nsec);
1705 }
1706 if (bmval0 & FATTR4_WORD0_SIZE) {
1707 if ((buflen -= 8) < 0)
1708 goto out_resource;
1709 WRITE64(stat.size);
1710 }
1711 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1712 if ((buflen -= 4) < 0)
1713 goto out_resource;
1714 WRITE32(1);
1715 }
1716 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1717 if ((buflen -= 4) < 0)
1718 goto out_resource;
1719 WRITE32(1);
1720 }
1721 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1722 if ((buflen -= 4) < 0)
1723 goto out_resource;
1724 WRITE32(0);
1725 }
1726 if (bmval0 & FATTR4_WORD0_FSID) {
1727 if ((buflen -= 16) < 0)
1728 goto out_resource;
42ca0993
BF		 1729 if (exp->ex_fslocs.migrated) {
1730 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1731 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 1732 } else switch(fsid_source(fhp)) {
1733 case FSIDSOURCE_FSID:
1da177e4
LT		 1734 WRITE64((u64)exp->ex_fsid);
1735 WRITE64((u64)0);
af6a4e28
N		 1736 break;
1737 case FSIDSOURCE_DEV:
1da177e4
LT		 1738 WRITE32(0);
1739 WRITE32(MAJOR(stat.dev));
1740 WRITE32(0);
1741 WRITE32(MINOR(stat.dev));
af6a4e28
N		 1742 break;
1743 case FSIDSOURCE_UUID:
1744 WRITEMEM(exp->ex_uuid, 16);
1745 break;
1da177e4
LT		 1746 }
1747 }
1748 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1749 if ((buflen -= 4) < 0)
1750 goto out_resource;
1751 WRITE32(0);
1752 }
1753 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1754 if ((buflen -= 4) < 0)
1755 goto out_resource;
1756 WRITE32(NFSD_LEASE_TIME);
1757 }
1758 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1759 if ((buflen -= 4) < 0)
1760 goto out_resource;
42ca0993 1761 WRITE32(rdattr_err);
1da177e4
LT		 1762 }
1763 if (bmval0 & FATTR4_WORD0_ACL) {
1764 struct nfs4_ace *ace;
1da177e4
LT		 1765
1766 if (acl == NULL) {
1767 if ((buflen -= 4) < 0)
1768 goto out_resource;
1769
1770 WRITE32(0);
1771 goto out_acl;
1772 }
1773 if ((buflen -= 4) < 0)
1774 goto out_resource;
1775 WRITE32(acl->naces);
1776
28e05dd8 1777 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 1778 if ((buflen -= 4*3) < 0)
1779 goto out_resource;
1780 WRITE32(ace->type);
1781 WRITE32(ace->flag);
1782 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1783 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1784 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1785 &p, &buflen);
1786 if (status == nfserr_resource)
1787 goto out_resource;
1788 if (status)
1789 goto out;
1790 }
1791 }
1792out_acl:
1793 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1794 if ((buflen -= 4) < 0)
1795 goto out_resource;
1796 WRITE32(aclsupport ?
1797 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1798 }
1799 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1800 if ((buflen -= 4) < 0)
1801 goto out_resource;
1802 WRITE32(1);
1803 }
1804 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1805 if ((buflen -= 4) < 0)
1806 goto out_resource;
1807 WRITE32(1);
1808 }
1809 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1810 if ((buflen -= 4) < 0)
1811 goto out_resource;
1812 WRITE32(1);
1813 }
1814 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1815 if ((buflen -= 4) < 0)
1816 goto out_resource;
1817 WRITE32(1);
1818 }
1819 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1820 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1821 if (buflen < 0)
1822 goto out_resource;
1823 WRITE32(fhp->fh_handle.fh_size);
1824 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1825 }
1826 if (bmval0 & FATTR4_WORD0_FILEID) {
1827 if ((buflen -= 8) < 0)
1828 goto out_resource;
40ee5dc6 1829 WRITE64(stat.ino);
1da177e4
LT		 1830 }
1831 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1832 if ((buflen -= 8) < 0)
1833 goto out_resource;
1834 WRITE64((u64) statfs.f_ffree);
1835 }
1836 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1837 if ((buflen -= 8) < 0)
1838 goto out_resource;
1839 WRITE64((u64) statfs.f_ffree);
1840 }
1841 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1842 if ((buflen -= 8) < 0)
1843 goto out_resource;
1844 WRITE64((u64) statfs.f_files);
1845 }
81c3f413
BF		 1846 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1847 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1848 if (status == nfserr_resource)
1849 goto out_resource;
1850 if (status)
1851 goto out;
1852 }
1da177e4
LT		 1853 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1854 if ((buflen -= 4) < 0)
1855 goto out_resource;
1856 WRITE32(1);
1857 }
1858 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1859 if ((buflen -= 8) < 0)
1860 goto out_resource;
1861 WRITE64(~(u64)0);
1862 }
1863 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1864 if ((buflen -= 4) < 0)
1865 goto out_resource;
1866 WRITE32(255);
1867 }
1868 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1869 if ((buflen -= 4) < 0)
1870 goto out_resource;
a16e92ed 1871 WRITE32(statfs.f_namelen);
1da177e4
LT		 1872 }
1873 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1874 if ((buflen -= 8) < 0)
1875 goto out_resource;
7adae489 1876 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 1877 }
1878 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1879 if ((buflen -= 8) < 0)
1880 goto out_resource;
7adae489 1881 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 1882 }
1883 if (bmval1 & FATTR4_WORD1_MODE) {
1884 if ((buflen -= 4) < 0)
1885 goto out_resource;
1886 WRITE32(stat.mode & S_IALLUGO);
1887 }
1888 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1889 if ((buflen -= 4) < 0)
1890 goto out_resource;
1891 WRITE32(1);
1892 }
1893 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1894 if ((buflen -= 4) < 0)
1895 goto out_resource;
1896 WRITE32(stat.nlink);
1897 }
1898 if (bmval1 & FATTR4_WORD1_OWNER) {
1899 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1900 if (status == nfserr_resource)
1901 goto out_resource;
1902 if (status)
1903 goto out;
1904 }
1905 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1906 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1907 if (status == nfserr_resource)
1908 goto out_resource;
1909 if (status)
1910 goto out;
1911 }
1912 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1913 if ((buflen -= 8) < 0)
1914 goto out_resource;
1915 WRITE32((u32) MAJOR(stat.rdev));
1916 WRITE32((u32) MINOR(stat.rdev));
1917 }
1918 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1919 if ((buflen -= 8) < 0)
1920 goto out_resource;
1921 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1922 WRITE64(dummy64);
1923 }
1924 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1925 if ((buflen -= 8) < 0)
1926 goto out_resource;
1927 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1928 WRITE64(dummy64);
1929 }
1930 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1931 if ((buflen -= 8) < 0)
1932 goto out_resource;
1933 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1934 WRITE64(dummy64);
1935 }
1936 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1937 if ((buflen -= 8) < 0)
1938 goto out_resource;
1939 dummy64 = (u64)stat.blocks << 9;
1940 WRITE64(dummy64);
1941 }
1942 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1943 if ((buflen -= 12) < 0)
1944 goto out_resource;
1945 WRITE32(0);
1946 WRITE32(stat.atime.tv_sec);
1947 WRITE32(stat.atime.tv_nsec);
1948 }
1949 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1950 if ((buflen -= 12) < 0)
1951 goto out_resource;
1952 WRITE32(0);
1953 WRITE32(1);
1954 WRITE32(0);
1955 }
1956 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1957 if ((buflen -= 12) < 0)
1958 goto out_resource;
1959 WRITE32(0);
1960 WRITE32(stat.ctime.tv_sec);
1961 WRITE32(stat.ctime.tv_nsec);
1962 }
1963 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1964 if ((buflen -= 12) < 0)
1965 goto out_resource;
1966 WRITE32(0);
1967 WRITE32(stat.mtime.tv_sec);
1968 WRITE32(stat.mtime.tv_nsec);
1969 }
1970 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 1971 if ((buflen -= 8) < 0)
1972 goto out_resource;
406a7ea9
FF		 1973 /*
1974 * Get parent's attributes if not ignoring crossmount
1975 * and this is the root of a cross-mounted filesystem.
1976 */
1977 if (ignore_crossmnt == 0 &&
54775491
JB		 1978 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
1979 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
1980 exp->ex_path.mnt->mnt_mountpoint, &stat);
40ee5dc6
PS		 1981 if (err)
1982 goto out_nfserr;
1983 }
1984 WRITE64(stat.ino);
1da177e4
LT		 1985 }
1986 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1987 *countp = p - buffer;
1988 status = nfs_ok;
1989
1990out:
28e05dd8 1991 kfree(acl);
1da177e4
LT		 1992 if (fhp == &tempfh)
1993 fh_put(&tempfh);
1994 return status;
1995out_nfserr:
b8dd7b9a 1996 status = nfserrno(err);
1da177e4
LT		 1997 goto out;
1998out_resource:
1999 *countp = 0;
2000 status = nfserr_resource;
2001 goto out;
2002out_serverfault:
2003 status = nfserr_serverfault;
2004 goto out;
2005}
2006
c0ce6ec8
BF		 2007static inline int attributes_need_mount(u32 *bmval)
2008{
2009 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2010 return 1;
2011 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2012 return 1;
2013 return 0;
2014}
2015
b37ad28b 2016static __be32
1da177e4 2017nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2ebbc012 2018 const char *name, int namlen, __be32 *p, int *buflen)
1da177e4
LT		 2019{
2020 struct svc_export *exp = cd->rd_fhp->fh_export;
2021 struct dentry *dentry;
b37ad28b 2022 __be32 nfserr;
406a7ea9 2023 int ignore_crossmnt = 0;
1da177e4
LT		 2024
2025 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2026 if (IS_ERR(dentry))
2027 return nfserrno(PTR_ERR(dentry));
2028
2029 exp_get(exp);
406a7ea9
FF		 2030 /*
2031 * In the case of a mountpoint, the client may be asking for
2032 * attributes that are only properties of the underlying filesystem
2033 * as opposed to the cross-mounted file system. In such a case,
2034 * we will not follow the cross mount and will fill the attribtutes
2035 * directly from the mountpoint dentry.
2036 */
c0ce6ec8 2037 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
406a7ea9
FF		 2038 ignore_crossmnt = 1;
2039 else if (d_mountpoint(dentry)) {
021d3a72
BF		 2040 int err;
2041
dcb488a3
AA		 2042 /*
2043 * Why the heck aren't we just using nfsd_lookup??
2044 * Different "."/".." handling? Something else?
2045 * At least, add a comment here to explain....
2046 */
021d3a72
BF		 2047 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2048 if (err) {
2049 nfserr = nfserrno(err);
1da177e4
LT		 2050 goto out_put;
2051 }
dcb488a3
AA		 2052 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2053 if (nfserr)
2054 goto out_put;
1da177e4
LT		 2055
2056 }
2057 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 2058 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2059out_put:
2060 dput(dentry);
2061 exp_put(exp);
2062 return nfserr;
2063}
2064
2ebbc012 2065static __be32 *
b37ad28b 2066nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2067{
2ebbc012 2068 __be32 *attrlenp;
1da177e4
LT		 2069
2070 if (buflen < 6)
2071 return NULL;
2072 *p++ = htonl(2);
2073 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2074 *p++ = htonl(0); /* bmval1 */
2075
2076 attrlenp = p++;
2077 *p++ = nfserr; /* no htonl */
2078 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2079 return p;
2080}
2081
2082static int
a0ad13ef
N		 2083nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2084 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2085{
a0ad13ef 2086 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2087 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2088 int buflen;
2ebbc012 2089 __be32 *p = cd->buffer;
b37ad28b 2090 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2091
2092 /* In nfsv4, "." and ".." never make it onto the wire.. */
2093 if (name && isdotent(name, namlen)) {
2094 cd->common.err = nfs_ok;
2095 return 0;
2096 }
2097
2098 if (cd->offset)
2099 xdr_encode_hyper(cd->offset, (u64) offset);
2100
2101 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2102 if (buflen < 0)
2103 goto fail;
2104
2105 *p++ = xdr_one; /* mark entry present */
2106 cd->offset = p; /* remember pointer */
2107 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2108 p = xdr_encode_array(p, name, namlen); /* name length & name */
2109
2110 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2111 switch (nfserr) {
2112 case nfs_ok:
2113 p += buflen;
2114 break;
2115 case nfserr_resource:
2116 nfserr = nfserr_toosmall;
2117 goto fail;
2118 case nfserr_dropit:
2119 goto fail;
2120 default:
2121 /*
2122 * If the client requested the RDATTR_ERROR attribute,
2123 * we stuff the error code into this attribute
2124 * and continue. If this attribute was not requested,
2125 * then in accordance with the spec, we fail the
2126 * entire READDIR operation(!)
2127 */
2128 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2129 goto fail;
1da177e4 2130 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2131 if (p == NULL) {
2132 nfserr = nfserr_toosmall;
1da177e4 2133 goto fail;
34081efc 2134 }
1da177e4
LT		 2135 }
2136 cd->buflen -= (p - cd->buffer);
2137 cd->buffer = p;
2138 cd->common.err = nfs_ok;
2139 return 0;
2140fail:
2141 cd->common.err = nfserr;
2142 return -EINVAL;
2143}
2144
e2f282b9
BH		 2145static void
2146nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2147{
2148 ENCODE_HEAD;
2149
2150 RESERVE_SPACE(sizeof(stateid_t));
2151 WRITE32(sid->si_generation);
2152 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2153 ADJUST_ARGS();
2154}
2155
695e12f8 2156static __be32
b37ad28b 2157nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4
LT		 2158{
2159 ENCODE_HEAD;
2160
2161 if (!nfserr) {
2162 RESERVE_SPACE(8);
2163 WRITE32(access->ac_supported);
2164 WRITE32(access->ac_resp_access);
2165 ADJUST_ARGS();
2166 }
695e12f8 2167 return nfserr;
1da177e4
LT		 2168}
2169
695e12f8 2170static __be32
b37ad28b 2171nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4
LT		 2172{
2173 ENCODE_SEQID_OP_HEAD;
2174
e2f282b9
BH		 2175 if (!nfserr)
2176 nfsd4_encode_stateid(resp, &close->cl_stateid);
2177
1da177e4 2178 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
695e12f8 2179 return nfserr;
1da177e4
LT		 2180}
2181
2182
695e12f8 2183static __be32
b37ad28b 2184nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4
LT		 2185{
2186 ENCODE_HEAD;
2187
2188 if (!nfserr) {
2189 RESERVE_SPACE(8);
2190 WRITEMEM(commit->co_verf.data, 8);
2191 ADJUST_ARGS();
2192 }
695e12f8 2193 return nfserr;
1da177e4
LT		 2194}
2195
695e12f8 2196static __be32
b37ad28b 2197nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4
LT		 2198{
2199 ENCODE_HEAD;
2200
2201 if (!nfserr) {
2202 RESERVE_SPACE(32);
2203 WRITECINFO(create->cr_cinfo);
2204 WRITE32(2);
2205 WRITE32(create->cr_bmval[0]);
2206 WRITE32(create->cr_bmval[1]);
2207 ADJUST_ARGS();
2208 }
695e12f8 2209 return nfserr;
1da177e4
LT		 2210}
2211
b37ad28b
AV		 2212static __be32
2213nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2214{
2215 struct svc_fh *fhp = getattr->ga_fhp;
2216 int buflen;
2217
2218 if (nfserr)
2219 return nfserr;
2220
2221 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2222 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2223 resp->p, &buflen, getattr->ga_bmval,
406a7ea9 2224 resp->rqstp, 0);
1da177e4
LT		 2225 if (!nfserr)
2226 resp->p += buflen;
2227 return nfserr;
2228}
2229
695e12f8
BH		 2230static __be32
2231nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2232{
695e12f8 2233 struct svc_fh *fhp = *fhpp;
1da177e4
LT		 2234 unsigned int len;
2235 ENCODE_HEAD;
2236
2237 if (!nfserr) {
2238 len = fhp->fh_handle.fh_size;
2239 RESERVE_SPACE(len + 4);
2240 WRITE32(len);
2241 WRITEMEM(&fhp->fh_handle.fh_base, len);
2242 ADJUST_ARGS();
2243 }
695e12f8 2244 return nfserr;
1da177e4
LT		 2245}
2246
2247/*
2248* Including all fields other than the name, a LOCK4denied structure requires
2249* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2250*/
2251static void
2252nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2253{
2254 ENCODE_HEAD;
2255
2256 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2257 WRITE64(ld->ld_start);
2258 WRITE64(ld->ld_length);
2259 WRITE32(ld->ld_type);
2260 if (ld->ld_sop) {
2261 WRITEMEM(&ld->ld_clientid, 8);
2262 WRITE32(ld->ld_sop->so_owner.len);
2263 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2264 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2265 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2266 WRITE64((u64)0); /* clientid */
2267 WRITE32(0); /* length of owner name */
2268 }
2269 ADJUST_ARGS();
2270}
2271
695e12f8 2272static __be32
b37ad28b 2273nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2274{
1da177e4
LT		 2275 ENCODE_SEQID_OP_HEAD;
2276
e2f282b9
BH		 2277 if (!nfserr)
2278 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2279 else if (nfserr == nfserr_denied)
1da177e4
LT		 2280 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2281
3a65588a 2282 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
695e12f8 2283 return nfserr;
1da177e4
LT		 2284}
2285
695e12f8 2286static __be32
b37ad28b 2287nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2288{
2289 if (nfserr == nfserr_denied)
2290 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2291 return nfserr;
1da177e4
LT		 2292}
2293
695e12f8 2294static __be32
b37ad28b 2295nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4
LT		 2296{
2297 ENCODE_SEQID_OP_HEAD;
2298
e2f282b9
BH		 2299 if (!nfserr)
2300 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2301
1da177e4 2302 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
695e12f8 2303 return nfserr;
1da177e4
LT		 2304}
2305
2306
695e12f8 2307static __be32
b37ad28b 2308nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4
LT		 2309{
2310 ENCODE_HEAD;
2311
2312 if (!nfserr) {
2313 RESERVE_SPACE(20);
2314 WRITECINFO(link->li_cinfo);
2315 ADJUST_ARGS();
2316 }
695e12f8 2317 return nfserr;
1da177e4
LT		 2318}
2319
2320
695e12f8 2321static __be32
b37ad28b 2322nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2323{
1b6b2257 2324 ENCODE_HEAD;
1da177e4
LT		 2325 ENCODE_SEQID_OP_HEAD;
2326
2327 if (nfserr)
2328 goto out;
2329
e2f282b9
BH		 2330 nfsd4_encode_stateid(resp, &open->op_stateid);
2331 RESERVE_SPACE(40);
1da177e4
LT		 2332 WRITECINFO(open->op_cinfo);
2333 WRITE32(open->op_rflags);
2334 WRITE32(2);
2335 WRITE32(open->op_bmval[0]);
2336 WRITE32(open->op_bmval[1]);
2337 WRITE32(open->op_delegate_type);
2338 ADJUST_ARGS();
2339
2340 switch (open->op_delegate_type) {
2341 case NFS4_OPEN_DELEGATE_NONE:
2342 break;
2343 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2344 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2345 RESERVE_SPACE(20);
7b190fec 2346 WRITE32(open->op_recall);
1da177e4
LT		 2347
2348 /*
2349 * TODO: ACE's in delegations
2350 */
2351 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2352 WRITE32(0);
2353 WRITE32(0);
2354 WRITE32(0); /* XXX: is NULL principal ok? */
2355 ADJUST_ARGS();
2356 break;
2357 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2358 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2359 RESERVE_SPACE(32);
1da177e4
LT		 2360 WRITE32(0);
2361
2362 /*
2363 * TODO: space_limit's in delegations
2364 */
2365 WRITE32(NFS4_LIMIT_SIZE);
2366 WRITE32(~(u32)0);
2367 WRITE32(~(u32)0);
2368
2369 /*
2370 * TODO: ACE's in delegations
2371 */
2372 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2373 WRITE32(0);
2374 WRITE32(0);
2375 WRITE32(0); /* XXX: is NULL principal ok? */
2376 ADJUST_ARGS();
2377 break;
2378 default:
2379 BUG();
2380 }
2381 /* XXX save filehandle here */
2382out:
2383 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
695e12f8 2384 return nfserr;
1da177e4
LT		 2385}
2386
695e12f8 2387static __be32
b37ad28b 2388nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4
LT		 2389{
2390 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2391
2392 if (!nfserr)
2393 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4
LT		 2394
2395 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
695e12f8 2396 return nfserr;
1da177e4
LT		 2397}
2398
695e12f8 2399static __be32
b37ad28b 2400nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4
LT		 2401{
2402 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2403
2404 if (!nfserr)
2405 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4
LT		 2406
2407 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
695e12f8 2408 return nfserr;
1da177e4
LT		 2409}
2410
b37ad28b
AV		 2411static __be32
2412nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2413 struct nfsd4_read *read)
1da177e4
LT		 2414{
2415 u32 eof;
2416 int v, pn;
2417 unsigned long maxcount;
2418 long len;
2419 ENCODE_HEAD;
2420
2421 if (nfserr)
2422 return nfserr;
2423 if (resp->xbuf->page_len)
2424 return nfserr_resource;
2425
2426 RESERVE_SPACE(8); /* eof flag and byte count */
2427
7adae489 2428 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2429 if (maxcount > read->rd_length)
2430 maxcount = read->rd_length;
2431
2432 len = maxcount;
2433 v = 0;
2434 while (len > 0) {
44524359 2435 pn = resp->rqstp->rq_resused++;
3cc03b16 2436 resp->rqstp->rq_vec[v].iov_base =
44524359 2437 page_address(resp->rqstp->rq_respages[pn]);
3cc03b16 2438 resp->rqstp->rq_vec[v].iov_len =
44524359 2439 len < PAGE_SIZE ? len : PAGE_SIZE;
1da177e4
LT		 2440 v++;
2441 len -= PAGE_SIZE;
2442 }
2443 read->rd_vlen = v;
2444
2445 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2446 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2447 &maxcount);
2448
2449 if (nfserr == nfserr_symlink)
2450 nfserr = nfserr_inval;
2451 if (nfserr)
2452 return nfserr;
44524359
N		 2453 eof = (read->rd_offset + maxcount >=
2454 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2455
2456 WRITE32(eof);
2457 WRITE32(maxcount);
2458 ADJUST_ARGS();
6ed6decc
N		 2459 resp->xbuf->head[0].iov_len = (char*)p
2460 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2461 resp->xbuf->page_len = maxcount;
2462
6ed6decc 2463 /* Use rest of head for padding and remaining ops: */
6ed6decc 2464 resp->xbuf->tail[0].iov_base = p;
1da177e4 2465 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2466 if (maxcount&3) {
6ed6decc
N		 2467 RESERVE_SPACE(4);
2468 WRITE32(0);
1da177e4
LT		 2469 resp->xbuf->tail[0].iov_base += maxcount&3;
2470 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2471 ADJUST_ARGS();
1da177e4
LT		 2472 }
2473 return 0;
2474}
2475
b37ad28b
AV		 2476static __be32
2477nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 2478{
2479 int maxcount;
2480 char *page;
2481 ENCODE_HEAD;
2482
2483 if (nfserr)
2484 return nfserr;
2485 if (resp->xbuf->page_len)
2486 return nfserr_resource;
2487
44524359 2488 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2489
2490 maxcount = PAGE_SIZE;
2491 RESERVE_SPACE(4);
2492
2493 /*
2494 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2495 * if they would overflow the buffer. Is this kosher in NFSv4? If
2496 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2497 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2498 */
2499 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2500 if (nfserr == nfserr_isdir)
2501 return nfserr_inval;
2502 if (nfserr)
2503 return nfserr;
2504
2505 WRITE32(maxcount);
2506 ADJUST_ARGS();
6ed6decc
N		 2507 resp->xbuf->head[0].iov_len = (char*)p
2508 - (char*)resp->xbuf->head[0].iov_base;
2509 resp->xbuf->page_len = maxcount;
1da177e4 2510
6ed6decc 2511 /* Use rest of head for padding and remaining ops: */
6ed6decc 2512 resp->xbuf->tail[0].iov_base = p;
1da177e4 2513 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2514 if (maxcount&3) {
6ed6decc
N		 2515 RESERVE_SPACE(4);
2516 WRITE32(0);
1da177e4
LT		 2517 resp->xbuf->tail[0].iov_base += maxcount&3;
2518 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2519 ADJUST_ARGS();
1da177e4
LT		 2520 }
2521 return 0;
2522}
2523
b37ad28b
AV		 2524static __be32
2525nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 2526{
2527 int maxcount;
2528 loff_t offset;
2ebbc012 2529 __be32 *page, *savep, *tailbase;
1da177e4
LT		 2530 ENCODE_HEAD;
2531
2532 if (nfserr)
2533 return nfserr;
2534 if (resp->xbuf->page_len)
2535 return nfserr_resource;
2536
2537 RESERVE_SPACE(8); /* verifier */
2538 savep = p;
2539
2540 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2541 WRITE32(0);
2542 WRITE32(0);
2543 ADJUST_ARGS();
2544 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 2545 tailbase = p;
1da177e4
LT		 2546
2547 maxcount = PAGE_SIZE;
2548 if (maxcount > readdir->rd_maxcount)
2549 maxcount = readdir->rd_maxcount;
2550
2551 /*
2552 * Convert from bytes to words, account for the two words already
2553 * written, make sure to leave two words at the end for the next
2554 * pointer and eof field.
2555 */
2556 maxcount = (maxcount >> 2) - 4;
2557 if (maxcount < 0) {
2558 nfserr = nfserr_toosmall;
2559 goto err_no_verf;
2560 }
2561
44524359 2562 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2563 readdir->common.err = 0;
2564 readdir->buflen = maxcount;
2565 readdir->buffer = page;
2566 readdir->offset = NULL;
2567
2568 offset = readdir->rd_cookie;
2569 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2570 &offset,
2571 &readdir->common, nfsd4_encode_dirent);
2572 if (nfserr == nfs_ok &&
2573 readdir->common.err == nfserr_toosmall &&
2574 readdir->buffer == page)
2575 nfserr = nfserr_toosmall;
2576 if (nfserr == nfserr_symlink)
2577 nfserr = nfserr_notdir;
2578 if (nfserr)
2579 goto err_no_verf;
2580
2581 if (readdir->offset)
2582 xdr_encode_hyper(readdir->offset, offset);
2583
2584 p = readdir->buffer;
2585 *p++ = 0; /* no more entries */
2586 *p++ = htonl(readdir->common.err == nfserr_eof);
44524359
N		 2587 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2588 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
1da177e4 2589
bb6e8a9f 2590 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 2591 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 2592 resp->xbuf->tail[0].iov_len = 0;
2593 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 2594 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 2595
2596 return 0;
2597err_no_verf:
2598 p = savep;
2599 ADJUST_ARGS();
2600 return nfserr;
2601}
2602
695e12f8 2603static __be32
b37ad28b 2604nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4
LT		 2605{
2606 ENCODE_HEAD;
2607
2608 if (!nfserr) {
2609 RESERVE_SPACE(20);
2610 WRITECINFO(remove->rm_cinfo);
2611 ADJUST_ARGS();
2612 }
695e12f8 2613 return nfserr;
1da177e4
LT		 2614}
2615
695e12f8 2616static __be32
b37ad28b 2617nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4
LT		 2618{
2619 ENCODE_HEAD;
2620
2621 if (!nfserr) {
2622 RESERVE_SPACE(40);
2623 WRITECINFO(rename->rn_sinfo);
2624 WRITECINFO(rename->rn_tinfo);
2625 ADJUST_ARGS();
2626 }
695e12f8 2627 return nfserr;
1da177e4
LT		 2628}
2629
695e12f8 2630static __be32
ca5c8cde 2631nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
dcb488a3
AA		 2632 struct nfsd4_secinfo *secinfo)
2633{
2634 int i = 0;
2635 struct svc_export *exp = secinfo->si_exp;
4796f457
BF		 2636 u32 nflavs;
2637 struct exp_flavor_info *flavs;
2638 struct exp_flavor_info def_flavs[2];
dcb488a3
AA		 2639 ENCODE_HEAD;
2640
2641 if (nfserr)
2642 goto out;
4796f457
BF		 2643 if (exp->ex_nflavors) {
2644 flavs = exp->ex_flavors;
2645 nflavs = exp->ex_nflavors;
2646 } else { /* Handling of some defaults in absence of real secinfo: */
2647 flavs = def_flavs;
2648 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2649 nflavs = 2;
2650 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2651 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2652 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2653 nflavs = 1;
2654 flavs[0].pseudoflavor
2655 = svcauth_gss_flavor(exp->ex_client);
2656 } else {
2657 nflavs = 1;
2658 flavs[0].pseudoflavor
2659 = exp->ex_client->flavour->flavour;
2660 }
2661 }
2662
dcb488a3 2663 RESERVE_SPACE(4);
4796f457 2664 WRITE32(nflavs);
dcb488a3 2665 ADJUST_ARGS();
4796f457
BF		 2666 for (i = 0; i < nflavs; i++) {
2667 u32 flav = flavs[i].pseudoflavor;
dcb488a3
AA		 2668 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2669
2670 if (gm) {
2671 RESERVE_SPACE(4);
2672 WRITE32(RPC_AUTH_GSS);
2673 ADJUST_ARGS();
2674 RESERVE_SPACE(4 + gm->gm_oid.len);
2675 WRITE32(gm->gm_oid.len);
2676 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2677 ADJUST_ARGS();
2678 RESERVE_SPACE(4);
2679 WRITE32(0); /* qop */
2680 ADJUST_ARGS();
2681 RESERVE_SPACE(4);
2682 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2683 ADJUST_ARGS();
2684 gss_mech_put(gm);
2685 } else {
2686 RESERVE_SPACE(4);
2687 WRITE32(flav);
2688 ADJUST_ARGS();
2689 }
2690 }
2691out:
2692 if (exp)
2693 exp_put(exp);
695e12f8 2694 return nfserr;
dcb488a3
AA		 2695}
2696
1da177e4
LT		 2697/*
2698 * The SETATTR encode routine is special -- it always encodes a bitmap,
2699 * regardless of the error status.
2700 */
695e12f8 2701static __be32
b37ad28b 2702nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4
LT		 2703{
2704 ENCODE_HEAD;
2705
2706 RESERVE_SPACE(12);
2707 if (nfserr) {
2708 WRITE32(2);
2709 WRITE32(0);
2710 WRITE32(0);
2711 }
2712 else {
2713 WRITE32(2);
2714 WRITE32(setattr->sa_bmval[0]);
2715 WRITE32(setattr->sa_bmval[1]);
2716 }
2717 ADJUST_ARGS();
695e12f8 2718 return nfserr;
1da177e4
LT		 2719}
2720
695e12f8 2721static __be32
b37ad28b 2722nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4
LT		 2723{
2724 ENCODE_HEAD;
2725
2726 if (!nfserr) {
2727 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2728 WRITEMEM(&scd->se_clientid, 8);
2729 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2730 ADJUST_ARGS();
2731 }
2732 else if (nfserr == nfserr_clid_inuse) {
2733 RESERVE_SPACE(8);
2734 WRITE32(0);
2735 WRITE32(0);
2736 ADJUST_ARGS();
2737 }
695e12f8 2738 return nfserr;
1da177e4
LT		 2739}
2740
695e12f8 2741static __be32
b37ad28b 2742nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4
LT		 2743{
2744 ENCODE_HEAD;
2745
2746 if (!nfserr) {
2747 RESERVE_SPACE(16);
2748 WRITE32(write->wr_bytes_written);
2749 WRITE32(write->wr_how_written);
2750 WRITEMEM(write->wr_verifier.data, 8);
2751 ADJUST_ARGS();
2752 }
695e12f8 2753 return nfserr;
1da177e4
LT		 2754}
2755
2db134eb
AA		 2756static __be32
2757nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2758 struct nfsd4_exchange_id *exid)
2759{
0733d213
AA		 2760 ENCODE_HEAD;
2761 char *major_id;
2762 char *server_scope;
2763 int major_id_sz;
2764 int server_scope_sz;
2765 uint64_t minor_id = 0;
2766
2767 if (nfserr)
2768 return nfserr;
2769
2770 major_id = utsname()->nodename;
2771 major_id_sz = strlen(major_id);
2772 server_scope = utsname()->nodename;
2773 server_scope_sz = strlen(server_scope);
2774
2775 RESERVE_SPACE(
2776 8 /* eir_clientid */ +
2777 4 /* eir_sequenceid */ +
2778 4 /* eir_flags */ +
2779 4 /* spr_how (SP4_NONE) */ +
2780 8 /* so_minor_id */ +
2781 4 /* so_major_id.len */ +
2782 (XDR_QUADLEN(major_id_sz) * 4) +
2783 4 /* eir_server_scope.len */ +
2784 (XDR_QUADLEN(server_scope_sz) * 4) +
2785 4 /* eir_server_impl_id.count (0) */);
2786
2787 WRITEMEM(&exid->clientid, 8);
2788 WRITE32(exid->seqid);
2789 WRITE32(exid->flags);
2790
2791 /* state_protect4_r. Currently only support SP4_NONE */
2792 BUG_ON(exid->spa_how != SP4_NONE);
2793 WRITE32(exid->spa_how);
2794
2795 /* The server_owner struct */
2796 WRITE64(minor_id); /* Minor id */
2797 /* major id */
2798 WRITE32(major_id_sz);
2799 WRITEMEM(major_id, major_id_sz);
2800
2801 /* Server scope */
2802 WRITE32(server_scope_sz);
2803 WRITEMEM(server_scope, server_scope_sz);
2804
2805 /* Implementation id */
2806 WRITE32(0); /* zero length nfs_impl_id4 array */
2807 ADJUST_ARGS();
2808 return 0;
2db134eb
AA		 2809}
2810
2811static __be32
2812nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
2813 struct nfsd4_create_session *sess)
2814{
2815 /* stub */
2816 return nfserr;
2817}
2818
2819static __be32
2820nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
2821 struct nfsd4_destroy_session *destroy_session)
2822{
2823 /* stub */
2824 return nfserr;
2825}
2826
2827static __be32
2828nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
2829 struct nfsd4_sequence *seq)
2830{
2831 /* stub */
2832 return nfserr;
2833}
2834
695e12f8
BH		 2835static __be32
2836nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
2837{
2838 return nfserr;
2839}
2840
2841typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
2842
2db134eb
AA		 2843/*
2844 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
2845 * since we don't need to filter out obsolete ops as this is
2846 * done in the decoding phase.
2847 */
695e12f8 2848static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 2849 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
2850 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
2851 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
2852 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
2853 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
2854 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
2855 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
2856 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
2857 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
2858 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
2859 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
2860 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
2861 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
2862 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
2863 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
2864 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 2865 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 2866 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
2867 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
2868 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
2869 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
2870 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
2871 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
2872 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
2873 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
2874 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
2875 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
2876 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
2877 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
2878 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
2879 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
2880 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
2881 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
2882 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
2883 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
2884 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
2885 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 2886
2887 /* NFSv4.1 operations */
2888 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
2889 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
2890 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
2891 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
2892 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
2893 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2894 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
2895 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
2896 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
2897 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
2898 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
2899 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
2900 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
2901 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
2902 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
2903 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2904 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
2905 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
2906 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 2907};
2908
1da177e4
LT		 2909void
2910nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2911{
2ebbc012 2912 __be32 *statp;
1da177e4
LT		 2913 ENCODE_HEAD;
2914
2915 RESERVE_SPACE(8);
2916 WRITE32(op->opnum);
2917 statp = p++; /* to be backfilled at the end */
2918 ADJUST_ARGS();
2919
695e12f8
BH		 2920 if (op->opnum == OP_ILLEGAL)
2921 goto status;
2922 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
2923 !nfsd4_enc_ops[op->opnum]);
2924 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
2925status:
1da177e4
LT		 2926 /*
2927 * Note: We write the status directly, instead of using WRITE32(),
2928 * since it is already in network byte order.
2929 */
2930 *statp = op->status;
2931}
2932
2933/*
2934 * Encode the reply stored in the stateowner reply cache
2935 *
2936 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2937 * previously sent already encoded operation.
2938 *
2939 * called with nfs4_lock_state() held
2940 */
2941void
2942nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2943{
2944 ENCODE_HEAD;
2945 struct nfs4_replay *rp = op->replay;
2946
2947 BUG_ON(!rp);
2948
2949 RESERVE_SPACE(8);
2950 WRITE32(op->opnum);
2951 *p++ = rp->rp_status; /* already xdr'ed */
2952 ADJUST_ARGS();
2953
2954 RESERVE_SPACE(rp->rp_buflen);
2955 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2956 ADJUST_ARGS();
2957}
2958
2959/*
2960 * END OF "GENERIC" ENCODE ROUTINES.
2961 */
2962
2963int
2ebbc012 2964nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 2965{
2966 return xdr_ressize_check(rqstp, p);
2967}
2968
2969void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2970{
2971 if (args->ops != args->iops) {
2972 kfree(args->ops);
2973 args->ops = args->iops;
2974 }
f99d49ad
JJ		 2975 kfree(args->tmpp);
2976 args->tmpp = NULL;
1da177e4
LT		 2977 while (args->to_free) {
2978 struct tmpbuf *tb = args->to_free;
2979 args->to_free = tb->next;
2980 tb->release(tb->buf);
2981 kfree(tb);
2982 }
2983}
2984
2985int
2ebbc012 2986nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 2987{
b37ad28b 2988 __be32 status;
1da177e4
LT		 2989
2990 args->p = p;
2991 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2992 args->pagelist = rqstp->rq_arg.pages;
2993 args->pagelen = rqstp->rq_arg.page_len;
2994 args->tmpp = NULL;
2995 args->to_free = NULL;
2996 args->ops = args->iops;
2997 args->rqstp = rqstp;
2998
2999 status = nfsd4_decode_compound(args);
3000 if (status) {
3001 nfsd4_release_compoundargs(args);
3002 }
3003 return !status;
3004}
3005
3006int
2ebbc012 3007nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3008{
3009 /*
3010 * All that remains is to write the tag and operation count...
3011 */
3012 struct kvec *iov;
3013 p = resp->tagp;
3014 *p++ = htonl(resp->taglen);
3015 memcpy(p, resp->tag, resp->taglen);
3016 p += XDR_QUADLEN(resp->taglen);
3017 *p++ = htonl(resp->opcnt);
3018
3019 if (rqstp->rq_res.page_len)
3020 iov = &rqstp->rq_res.tail[0];
3021 else
3022 iov = &rqstp->rq_res.head[0];
3023 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3024 BUG_ON(iov->iov_len > PAGE_SIZE);
3025 return 1;
3026}
3027
3028/*
3029 * Local variables:
3030 * c-basic-offset: 8
3031 * End:
3032 */
Michael's Linux tree.