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nfsd41: sequence operation
[deliverable/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{
b85d4c01
BH		 1116 DECODE_HEAD;
1117
1118 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1119 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1120 READ32(seq->seqid);
1121 READ32(seq->slotid);
1122 READ32(seq->maxslots);
1123 READ32(seq->cachethis);
1124
1125 DECODE_TAIL;
2db134eb
AA		 1126}
1127
347e0ad9
BH		 1128static __be32
1129nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1130{
1131 return nfs_ok;
1132}
1133
3c375c6f
BH		 1134static __be32
1135nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1136{
1e685ec2 1137 return nfserr_notsupp;
3c375c6f
BH		 1138}
1139
347e0ad9
BH		 1140typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1141
1142static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1143 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1144 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1145 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1146 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1147 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1148 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1149 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1150 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1151 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1152 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1153 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1154 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1155 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1156 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1157 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1158 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1159 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1160 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1161 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1162 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
a1c8c4d1 1163 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
ad1060c8
BF		 1164 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1165 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1166 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1167 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1168 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1169 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1170 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1171 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1172 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1173 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1174 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1175 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1176 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1177 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1178 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1179 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
347e0ad9
BH		 1180};
1181
2db134eb
AA		 1182static nfsd4_dec nfsd41_dec_ops[] = {
1183 [OP_ACCESS] (nfsd4_dec)nfsd4_decode_access,
1184 [OP_CLOSE] (nfsd4_dec)nfsd4_decode_close,
1185 [OP_COMMIT] (nfsd4_dec)nfsd4_decode_commit,
1186 [OP_CREATE] (nfsd4_dec)nfsd4_decode_create,
1187 [OP_DELEGPURGE] (nfsd4_dec)nfsd4_decode_notsupp,
1188 [OP_DELEGRETURN] (nfsd4_dec)nfsd4_decode_delegreturn,
1189 [OP_GETATTR] (nfsd4_dec)nfsd4_decode_getattr,
1190 [OP_GETFH] (nfsd4_dec)nfsd4_decode_noop,
1191 [OP_LINK] (nfsd4_dec)nfsd4_decode_link,
1192 [OP_LOCK] (nfsd4_dec)nfsd4_decode_lock,
1193 [OP_LOCKT] (nfsd4_dec)nfsd4_decode_lockt,
1194 [OP_LOCKU] (nfsd4_dec)nfsd4_decode_locku,
1195 [OP_LOOKUP] (nfsd4_dec)nfsd4_decode_lookup,
1196 [OP_LOOKUPP] (nfsd4_dec)nfsd4_decode_noop,
1197 [OP_NVERIFY] (nfsd4_dec)nfsd4_decode_verify,
1198 [OP_OPEN] (nfsd4_dec)nfsd4_decode_open,
1199 [OP_OPENATTR] (nfsd4_dec)nfsd4_decode_notsupp,
1200 [OP_OPEN_CONFIRM] (nfsd4_dec)nfsd4_decode_notsupp,
1201 [OP_OPEN_DOWNGRADE] (nfsd4_dec)nfsd4_decode_open_downgrade,
1202 [OP_PUTFH] (nfsd4_dec)nfsd4_decode_putfh,
1203 [OP_PUTPUBFH] (nfsd4_dec)nfsd4_decode_notsupp,
1204 [OP_PUTROOTFH] (nfsd4_dec)nfsd4_decode_noop,
1205 [OP_READ] (nfsd4_dec)nfsd4_decode_read,
1206 [OP_READDIR] (nfsd4_dec)nfsd4_decode_readdir,
1207 [OP_READLINK] (nfsd4_dec)nfsd4_decode_noop,
1208 [OP_REMOVE] (nfsd4_dec)nfsd4_decode_remove,
1209 [OP_RENAME] (nfsd4_dec)nfsd4_decode_rename,
1210 [OP_RENEW] (nfsd4_dec)nfsd4_decode_notsupp,
1211 [OP_RESTOREFH] (nfsd4_dec)nfsd4_decode_noop,
1212 [OP_SAVEFH] (nfsd4_dec)nfsd4_decode_noop,
1213 [OP_SECINFO] (nfsd4_dec)nfsd4_decode_secinfo,
1214 [OP_SETATTR] (nfsd4_dec)nfsd4_decode_setattr,
1215 [OP_SETCLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1216 [OP_SETCLIENTID_CONFIRM](nfsd4_dec)nfsd4_decode_notsupp,
1217 [OP_VERIFY] (nfsd4_dec)nfsd4_decode_verify,
1218 [OP_WRITE] (nfsd4_dec)nfsd4_decode_write,
1219 [OP_RELEASE_LOCKOWNER] (nfsd4_dec)nfsd4_decode_notsupp,
1220
1221 /* new operations for NFSv4.1 */
1222 [OP_BACKCHANNEL_CTL] (nfsd4_dec)nfsd4_decode_notsupp,
1223 [OP_BIND_CONN_TO_SESSION](nfsd4_dec)nfsd4_decode_notsupp,
1224 [OP_EXCHANGE_ID] (nfsd4_dec)nfsd4_decode_exchange_id,
1225 [OP_CREATE_SESSION] (nfsd4_dec)nfsd4_decode_create_session,
1226 [OP_DESTROY_SESSION] (nfsd4_dec)nfsd4_decode_destroy_session,
1227 [OP_FREE_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1228 [OP_GET_DIR_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1229 [OP_GETDEVICEINFO] (nfsd4_dec)nfsd4_decode_notsupp,
1230 [OP_GETDEVICELIST] (nfsd4_dec)nfsd4_decode_notsupp,
1231 [OP_LAYOUTCOMMIT] (nfsd4_dec)nfsd4_decode_notsupp,
1232 [OP_LAYOUTGET] (nfsd4_dec)nfsd4_decode_notsupp,
1233 [OP_LAYOUTRETURN] (nfsd4_dec)nfsd4_decode_notsupp,
1234 [OP_SECINFO_NO_NAME] (nfsd4_dec)nfsd4_decode_notsupp,
1235 [OP_SEQUENCE] (nfsd4_dec)nfsd4_decode_sequence,
1236 [OP_SET_SSV] (nfsd4_dec)nfsd4_decode_notsupp,
1237 [OP_TEST_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1238 [OP_WANT_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1239 [OP_DESTROY_CLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1240 [OP_RECLAIM_COMPLETE] (nfsd4_dec)nfsd4_decode_notsupp,
1241};
1242
f2feb96b
BH		 1243struct nfsd4_minorversion_ops {
1244 nfsd4_dec *decoders;
1245 int nops;
1246};
1247
1248static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
ad1060c8 1249 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
2db134eb 1250 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
f2feb96b
BH		 1251};
1252
b37ad28b 1253static __be32
1da177e4
LT		 1254nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1255{
1256 DECODE_HEAD;
1257 struct nfsd4_op *op;
f2feb96b 1258 struct nfsd4_minorversion_ops *ops;
1da177e4
LT		 1259 int i;
1260
1261 /*
1262 * XXX: According to spec, we should check the tag
1263 * for UTF-8 compliance. I'm postponing this for
1264 * now because it seems that some clients do use
1265 * binary tags.
1266 */
1267 READ_BUF(4);
1268 READ32(argp->taglen);
1269 READ_BUF(argp->taglen + 8);
1270 SAVEMEM(argp->tag, argp->taglen);
1271 READ32(argp->minorversion);
1272 READ32(argp->opcnt);
1273
1274 if (argp->taglen > NFSD4_MAX_TAGLEN)
1275 goto xdr_error;
1276 if (argp->opcnt > 100)
1277 goto xdr_error;
1278
e8c96f8c 1279 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1280 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1281 if (!argp->ops) {
1282 argp->ops = argp->iops;
817cb9d4 1283 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1284 goto xdr_error;
1285 }
1286 }
1287
f2feb96b 1288 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
30cff1ff
BH		 1289 argp->opcnt = 0;
1290
f2feb96b 1291 ops = &nfsd4_minorversion[argp->minorversion];
1da177e4
LT		 1292 for (i = 0; i < argp->opcnt; i++) {
1293 op = &argp->ops[i];
1294 op->replay = NULL;
1295
1296 /*
1297 * We can't use READ_BUF() here because we need to handle
1298 * a missing opcode as an OP_WRITE + 1. So we need to check
1299 * to see if we're truly at the end of our buffer or if there
1300 * is another page we need to flip to.
1301 */
1302
1303 if (argp->p == argp->end) {
1304 if (argp->pagelen < 4) {
1305 /* There isn't an opcode still on the wire */
1306 op->opnum = OP_WRITE + 1;
1307 op->status = nfserr_bad_xdr;
1308 argp->opcnt = i+1;
1309 break;
1310 }
1311
1312 /*
1313 * False alarm. We just hit a page boundary, but there
1314 * is still data available. Move pointer across page
1315 * boundary. *snip from READ_BUF*
1316 */
1317 argp->p = page_address(argp->pagelist[0]);
1318 argp->pagelist++;
1319 if (argp->pagelen < PAGE_SIZE) {
1320 argp->end = p + (argp->pagelen>>2);
1321 argp->pagelen = 0;
1322 } else {
1323 argp->end = p + (PAGE_SIZE>>2);
1324 argp->pagelen -= PAGE_SIZE;
1325 }
1326 }
1327 op->opnum = ntohl(*argp->p++);
1328
f2feb96b
BH		 1329 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1330 op->status = ops->decoders[op->opnum](argp, &op->u);
347e0ad9 1331 else {
1da177e4
LT		 1332 op->opnum = OP_ILLEGAL;
1333 op->status = nfserr_op_illegal;
1da177e4
LT		 1334 }
1335
1336 if (op->status) {
1337 argp->opcnt = i+1;
1338 break;
1339 }
1340 }
1341
1342 DECODE_TAIL;
1343}
1344/*
1345 * END OF "GENERIC" DECODE ROUTINES.
1346 */
1347
1348/*
1349 * START OF "GENERIC" ENCODE ROUTINES.
1350 * These may look a little ugly since they are imported from a "generic"
1351 * set of XDR encode/decode routines which are intended to be shared by
1352 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1353 *
1354 * If the pain of reading these is too great, it should be a straightforward
1355 * task to translate them into Linux-specific versions which are more
1356 * consistent with the style used in NFSv2/v3...
1357 */
2ebbc012 1358#define ENCODE_HEAD __be32 *p
1da177e4
LT		 1359
1360#define WRITE32(n) *p++ = htonl(n)
1361#define WRITE64(n) do { \
1362 *p++ = htonl((u32)((n) >> 32)); \
1363 *p++ = htonl((u32)(n)); \
1364} while (0)
5108b276 1365#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1366 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1367 memcpy(p, ptr, nbytes); \
1368 p += XDR_QUADLEN(nbytes); \
5108b276 1369}} while (0)
1da177e4
LT		 1370#define WRITECINFO(c) do { \
1371 *p++ = htonl(c.atomic); \
1372 *p++ = htonl(c.before_ctime_sec); \
1373 *p++ = htonl(c.before_ctime_nsec); \
1374 *p++ = htonl(c.after_ctime_sec); \
1375 *p++ = htonl(c.after_ctime_nsec); \
1376} while (0)
1377
1378#define RESERVE_SPACE(nbytes) do { \
1379 p = resp->p; \
1380 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1381} while (0)
1382#define ADJUST_ARGS() resp->p = p
1383
1384/*
1385 * Header routine to setup seqid operation replay cache
1386 */
1387#define ENCODE_SEQID_OP_HEAD \
2ebbc012 1388 __be32 *save; \
1da177e4
LT		 1389 \
1390 save = resp->p;
1391
1392/*
7fb64cee
N		 1393 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1394 * is where sequence id's are incremented, and the replay cache is filled.
1395 * Note that we increment sequence id's here, at the last moment, so we're sure
1396 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1397 */
1398
1399#define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1400 if (seqid_mutating_err(nfserr) && stateowner) { \
bd9aac52 1401 stateowner->so_seqid++; \
1da177e4
LT		 1402 stateowner->so_replay.rp_status = nfserr; \
1403 stateowner->so_replay.rp_buflen = \
1404 (((char *)(resp)->p - (char *)save)); \
1405 memcpy(stateowner->so_replay.rp_buf, save, \
1406 stateowner->so_replay.rp_buflen); \
1407 } } while (0);
1408
81c3f413
BF		 1409/* Encode as an array of strings the string given with components
1410 * seperated @sep.
1411 */
b37ad28b 1412static __be32 nfsd4_encode_components(char sep, char *components,
2ebbc012 1413 __be32 **pp, int *buflen)
81c3f413 1414{
2ebbc012
AV		 1415 __be32 *p = *pp;
1416 __be32 *countp = p;
81c3f413
BF		 1417 int strlen, count=0;
1418 char *str, *end;
1419
1420 dprintk("nfsd4_encode_components(%s)\n", components);
1421 if ((*buflen -= 4) < 0)
1422 return nfserr_resource;
1423 WRITE32(0); /* We will fill this in with @count later */
1424 end = str = components;
1425 while (*end) {
1426 for (; *end && (*end != sep); end++)
1427 ; /* Point to end of component */
1428 strlen = end - str;
1429 if (strlen) {
1430 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1431 return nfserr_resource;
1432 WRITE32(strlen);
1433 WRITEMEM(str, strlen);
1434 count++;
1435 }
1436 else
1437 end++;
1438 str = end;
1439 }
1440 *pp = p;
1441 p = countp;
1442 WRITE32(count);
1443 return 0;
1444}
1445
1446/*
1447 * encode a location element of a fs_locations structure
1448 */
b37ad28b 1449static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1450 __be32 **pp, int *buflen)
81c3f413 1451{
b37ad28b 1452 __be32 status;
2ebbc012 1453 __be32 *p = *pp;
81c3f413
BF		 1454
1455 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1456 if (status)
1457 return status;
1458 status = nfsd4_encode_components('/', location->path, &p, buflen);
1459 if (status)
1460 return status;
1461 *pp = p;
1462 return 0;
1463}
1464
1465/*
1466 * Return the path to an export point in the pseudo filesystem namespace
1467 * Returned string is safe to use as long as the caller holds a reference
1468 * to @exp.
1469 */
b37ad28b 1470static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
81c3f413
BF		 1471{
1472 struct svc_fh tmp_fh;
1473 char *path, *rootpath;
81c3f413
BF		 1474
1475 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb 1476 *stat = exp_pseudoroot(rqstp, &tmp_fh);
cc45f017
AV		 1477 if (*stat)
1478 return NULL;
54775491 1479 rootpath = tmp_fh.fh_export->ex_pathname;
81c3f413 1480
54775491 1481 path = exp->ex_pathname;
81c3f413
BF		 1482
1483 if (strncmp(path, rootpath, strlen(rootpath))) {
817cb9d4 1484 dprintk("nfsd: fs_locations failed;"
81c3f413 1485 "%s is not contained in %s\n", path, rootpath);
cc45f017
AV		 1486 *stat = nfserr_notsupp;
1487 return NULL;
81c3f413
BF		 1488 }
1489
1490 return path + strlen(rootpath);
1491}
1492
1493/*
1494 * encode a fs_locations structure
1495 */
b37ad28b 1496static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1497 struct svc_export *exp,
2ebbc012 1498 __be32 **pp, int *buflen)
81c3f413 1499{
b37ad28b 1500 __be32 status;
cc45f017 1501 int i;
2ebbc012 1502 __be32 *p = *pp;
81c3f413 1503 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
cc45f017 1504 char *root = nfsd4_path(rqstp, exp, &status);
81c3f413 1505
cc45f017
AV		 1506 if (status)
1507 return status;
81c3f413
BF		 1508 status = nfsd4_encode_components('/', root, &p, buflen);
1509 if (status)
1510 return status;
1511 if ((*buflen -= 4) < 0)
1512 return nfserr_resource;
1513 WRITE32(fslocs->locations_count);
1514 for (i=0; i<fslocs->locations_count; i++) {
1515 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1516 &p, buflen);
1517 if (status)
1518 return status;
1519 }
1520 *pp = p;
1521 return 0;
1522}
1da177e4
LT		 1523
1524static u32 nfs4_ftypes[16] = {
1525 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1526 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1527 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1528 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1529};
1530
b37ad28b 1531static __be32
1da177e4 1532nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1533 __be32 **p, int *buflen)
1da177e4
LT		 1534{
1535 int status;
1536
1537 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1538 return nfserr_resource;
1539 if (whotype != NFS4_ACL_WHO_NAMED)
1540 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1541 else if (group)
1542 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1543 else
1544 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1545 if (status < 0)
1546 return nfserrno(status);
1547 *p = xdr_encode_opaque(*p, NULL, status);
1548 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1549 BUG_ON(*buflen < 0);
1550 return 0;
1551}
1552
b37ad28b 1553static inline __be32
2ebbc012 1554nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1da177e4
LT		 1555{
1556 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1557}
1558
b37ad28b 1559static inline __be32
2ebbc012 1560nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1da177e4
LT		 1561{
1562 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1563}
1564
b37ad28b 1565static inline __be32
1da177e4 1566nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1567 __be32 **p, int *buflen)
1da177e4
LT		 1568{
1569 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1570}
1571
42ca0993
BF		 1572#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1573 FATTR4_WORD0_RDATTR_ERROR)
1574#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1575
b37ad28b 1576static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1577{
1578 /* As per referral draft: */
1579 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1580 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1581 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1582 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1583 *rdattr_err = NFSERR_MOVED;
1584 else
1585 return nfserr_moved;
1586 }
1587 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1588 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1589 return 0;
1590}
1da177e4
LT		 1591
1592/*
1593 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1594 * ourselves.
1595 *
1596 * @countp is the buffer size in _words_; upon successful return this becomes
1597 * replaced with the number of words written.
1598 */
b37ad28b 1599__be32
1da177e4 1600nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2ebbc012 1601 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
406a7ea9 1602 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 1603{
1604 u32 bmval0 = bmval[0];
1605 u32 bmval1 = bmval[1];
1606 struct kstat stat;
1607 struct svc_fh tempfh;
1608 struct kstatfs statfs;
1609 int buflen = *countp << 2;
2ebbc012 1610 __be32 *attrlenp;
1da177e4
LT		 1611 u32 dummy;
1612 u64 dummy64;
42ca0993 1613 u32 rdattr_err = 0;
2ebbc012 1614 __be32 *p = buffer;
b37ad28b 1615 __be32 status;
b8dd7b9a 1616 int err;
1da177e4
LT		 1617 int aclsupport = 0;
1618 struct nfs4_acl *acl = NULL;
1619
1620 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1621 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1622 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1623
42ca0993
BF		 1624 if (exp->ex_fslocs.migrated) {
1625 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1626 if (status)
1627 goto out;
1628 }
1629
54775491 1630 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
b8dd7b9a 1631 if (err)
1da177e4 1632 goto out_nfserr;
a16e92ed
BF		 1633 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1634 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 1635 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1636 FATTR4_WORD1_SPACE_TOTAL))) {
b8dd7b9a
AV		 1637 err = vfs_statfs(dentry, &statfs);
1638 if (err)
1da177e4
LT		 1639 goto out_nfserr;
1640 }
1641 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1642 fh_init(&tempfh, NFS4_FHSIZE);
1643 status = fh_compose(&tempfh, exp, dentry, NULL);
1644 if (status)
1645 goto out;
1646 fhp = &tempfh;
1647 }
1648 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1649 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 1650 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1651 aclsupport = (err == 0);
1da177e4 1652 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 1653 if (err == -EOPNOTSUPP)
1da177e4 1654 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 1655 else if (err == -EINVAL) {
1da177e4
LT		 1656 status = nfserr_attrnotsupp;
1657 goto out;
b8dd7b9a 1658 } else if (err != 0)
1da177e4
LT		 1659 goto out_nfserr;
1660 }
1661 }
81c3f413
BF		 1662 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1663 if (exp->ex_fslocs.locations == NULL) {
1664 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1665 }
1666 }
1da177e4
LT		 1667 if ((buflen -= 16) < 0)
1668 goto out_resource;
1669
1670 WRITE32(2);
1671 WRITE32(bmval0);
1672 WRITE32(bmval1);
1673 attrlenp = p++; /* to be backfilled later */
1674
1675 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
42ca0993 1676 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1da177e4
LT		 1677 if ((buflen -= 12) < 0)
1678 goto out_resource;
42ca0993
BF		 1679 if (!aclsupport)
1680 word0 &= ~FATTR4_WORD0_ACL;
1681 if (!exp->ex_fslocs.locations)
1682 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1da177e4 1683 WRITE32(2);
42ca0993 1684 WRITE32(word0);
1da177e4
LT		 1685 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1686 }
1687 if (bmval0 & FATTR4_WORD0_TYPE) {
1688 if ((buflen -= 4) < 0)
1689 goto out_resource;
1690 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1691 if (dummy == NF4BAD)
1692 goto out_serverfault;
1693 WRITE32(dummy);
1694 }
1695 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1696 if ((buflen -= 4) < 0)
1697 goto out_resource;
49640001 1698 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 1699 WRITE32(NFS4_FH_PERSISTENT);
49640001 1700 else
e34ac862 1701 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 1702 }
1703 if (bmval0 & FATTR4_WORD0_CHANGE) {
1704 /*
1705 * Note: This _must_ be consistent with the scheme for writing
1706 * change_info, so any changes made here must be reflected there
1707 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1708 * macro above.)
1709 */
1710 if ((buflen -= 8) < 0)
1711 goto out_resource;
1712 WRITE32(stat.ctime.tv_sec);
1713 WRITE32(stat.ctime.tv_nsec);
1714 }
1715 if (bmval0 & FATTR4_WORD0_SIZE) {
1716 if ((buflen -= 8) < 0)
1717 goto out_resource;
1718 WRITE64(stat.size);
1719 }
1720 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1721 if ((buflen -= 4) < 0)
1722 goto out_resource;
1723 WRITE32(1);
1724 }
1725 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1726 if ((buflen -= 4) < 0)
1727 goto out_resource;
1728 WRITE32(1);
1729 }
1730 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1731 if ((buflen -= 4) < 0)
1732 goto out_resource;
1733 WRITE32(0);
1734 }
1735 if (bmval0 & FATTR4_WORD0_FSID) {
1736 if ((buflen -= 16) < 0)
1737 goto out_resource;
42ca0993
BF		 1738 if (exp->ex_fslocs.migrated) {
1739 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1740 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 1741 } else switch(fsid_source(fhp)) {
1742 case FSIDSOURCE_FSID:
1da177e4
LT		 1743 WRITE64((u64)exp->ex_fsid);
1744 WRITE64((u64)0);
af6a4e28
N		 1745 break;
1746 case FSIDSOURCE_DEV:
1da177e4
LT		 1747 WRITE32(0);
1748 WRITE32(MAJOR(stat.dev));
1749 WRITE32(0);
1750 WRITE32(MINOR(stat.dev));
af6a4e28
N		 1751 break;
1752 case FSIDSOURCE_UUID:
1753 WRITEMEM(exp->ex_uuid, 16);
1754 break;
1da177e4
LT		 1755 }
1756 }
1757 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1758 if ((buflen -= 4) < 0)
1759 goto out_resource;
1760 WRITE32(0);
1761 }
1762 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1763 if ((buflen -= 4) < 0)
1764 goto out_resource;
1765 WRITE32(NFSD_LEASE_TIME);
1766 }
1767 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1768 if ((buflen -= 4) < 0)
1769 goto out_resource;
42ca0993 1770 WRITE32(rdattr_err);
1da177e4
LT		 1771 }
1772 if (bmval0 & FATTR4_WORD0_ACL) {
1773 struct nfs4_ace *ace;
1da177e4
LT		 1774
1775 if (acl == NULL) {
1776 if ((buflen -= 4) < 0)
1777 goto out_resource;
1778
1779 WRITE32(0);
1780 goto out_acl;
1781 }
1782 if ((buflen -= 4) < 0)
1783 goto out_resource;
1784 WRITE32(acl->naces);
1785
28e05dd8 1786 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 1787 if ((buflen -= 4*3) < 0)
1788 goto out_resource;
1789 WRITE32(ace->type);
1790 WRITE32(ace->flag);
1791 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1792 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1793 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1794 &p, &buflen);
1795 if (status == nfserr_resource)
1796 goto out_resource;
1797 if (status)
1798 goto out;
1799 }
1800 }
1801out_acl:
1802 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1803 if ((buflen -= 4) < 0)
1804 goto out_resource;
1805 WRITE32(aclsupport ?
1806 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1807 }
1808 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1809 if ((buflen -= 4) < 0)
1810 goto out_resource;
1811 WRITE32(1);
1812 }
1813 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1814 if ((buflen -= 4) < 0)
1815 goto out_resource;
1816 WRITE32(1);
1817 }
1818 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1819 if ((buflen -= 4) < 0)
1820 goto out_resource;
1821 WRITE32(1);
1822 }
1823 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1824 if ((buflen -= 4) < 0)
1825 goto out_resource;
1826 WRITE32(1);
1827 }
1828 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1829 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1830 if (buflen < 0)
1831 goto out_resource;
1832 WRITE32(fhp->fh_handle.fh_size);
1833 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1834 }
1835 if (bmval0 & FATTR4_WORD0_FILEID) {
1836 if ((buflen -= 8) < 0)
1837 goto out_resource;
40ee5dc6 1838 WRITE64(stat.ino);
1da177e4
LT		 1839 }
1840 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1841 if ((buflen -= 8) < 0)
1842 goto out_resource;
1843 WRITE64((u64) statfs.f_ffree);
1844 }
1845 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1846 if ((buflen -= 8) < 0)
1847 goto out_resource;
1848 WRITE64((u64) statfs.f_ffree);
1849 }
1850 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1851 if ((buflen -= 8) < 0)
1852 goto out_resource;
1853 WRITE64((u64) statfs.f_files);
1854 }
81c3f413
BF		 1855 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1856 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1857 if (status == nfserr_resource)
1858 goto out_resource;
1859 if (status)
1860 goto out;
1861 }
1da177e4
LT		 1862 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1863 if ((buflen -= 4) < 0)
1864 goto out_resource;
1865 WRITE32(1);
1866 }
1867 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1868 if ((buflen -= 8) < 0)
1869 goto out_resource;
1870 WRITE64(~(u64)0);
1871 }
1872 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1873 if ((buflen -= 4) < 0)
1874 goto out_resource;
1875 WRITE32(255);
1876 }
1877 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1878 if ((buflen -= 4) < 0)
1879 goto out_resource;
a16e92ed 1880 WRITE32(statfs.f_namelen);
1da177e4
LT		 1881 }
1882 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1883 if ((buflen -= 8) < 0)
1884 goto out_resource;
7adae489 1885 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 1886 }
1887 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1888 if ((buflen -= 8) < 0)
1889 goto out_resource;
7adae489 1890 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 1891 }
1892 if (bmval1 & FATTR4_WORD1_MODE) {
1893 if ((buflen -= 4) < 0)
1894 goto out_resource;
1895 WRITE32(stat.mode & S_IALLUGO);
1896 }
1897 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1898 if ((buflen -= 4) < 0)
1899 goto out_resource;
1900 WRITE32(1);
1901 }
1902 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1903 if ((buflen -= 4) < 0)
1904 goto out_resource;
1905 WRITE32(stat.nlink);
1906 }
1907 if (bmval1 & FATTR4_WORD1_OWNER) {
1908 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1909 if (status == nfserr_resource)
1910 goto out_resource;
1911 if (status)
1912 goto out;
1913 }
1914 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1915 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1916 if (status == nfserr_resource)
1917 goto out_resource;
1918 if (status)
1919 goto out;
1920 }
1921 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1922 if ((buflen -= 8) < 0)
1923 goto out_resource;
1924 WRITE32((u32) MAJOR(stat.rdev));
1925 WRITE32((u32) MINOR(stat.rdev));
1926 }
1927 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1928 if ((buflen -= 8) < 0)
1929 goto out_resource;
1930 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1931 WRITE64(dummy64);
1932 }
1933 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1934 if ((buflen -= 8) < 0)
1935 goto out_resource;
1936 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1937 WRITE64(dummy64);
1938 }
1939 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1940 if ((buflen -= 8) < 0)
1941 goto out_resource;
1942 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1943 WRITE64(dummy64);
1944 }
1945 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1946 if ((buflen -= 8) < 0)
1947 goto out_resource;
1948 dummy64 = (u64)stat.blocks << 9;
1949 WRITE64(dummy64);
1950 }
1951 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1952 if ((buflen -= 12) < 0)
1953 goto out_resource;
1954 WRITE32(0);
1955 WRITE32(stat.atime.tv_sec);
1956 WRITE32(stat.atime.tv_nsec);
1957 }
1958 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1959 if ((buflen -= 12) < 0)
1960 goto out_resource;
1961 WRITE32(0);
1962 WRITE32(1);
1963 WRITE32(0);
1964 }
1965 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1966 if ((buflen -= 12) < 0)
1967 goto out_resource;
1968 WRITE32(0);
1969 WRITE32(stat.ctime.tv_sec);
1970 WRITE32(stat.ctime.tv_nsec);
1971 }
1972 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1973 if ((buflen -= 12) < 0)
1974 goto out_resource;
1975 WRITE32(0);
1976 WRITE32(stat.mtime.tv_sec);
1977 WRITE32(stat.mtime.tv_nsec);
1978 }
1979 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 1980 if ((buflen -= 8) < 0)
1981 goto out_resource;
406a7ea9
FF		 1982 /*
1983 * Get parent's attributes if not ignoring crossmount
1984 * and this is the root of a cross-mounted filesystem.
1985 */
1986 if (ignore_crossmnt == 0 &&
54775491
JB		 1987 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
1988 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
1989 exp->ex_path.mnt->mnt_mountpoint, &stat);
40ee5dc6
PS		 1990 if (err)
1991 goto out_nfserr;
1992 }
1993 WRITE64(stat.ino);
1da177e4
LT		 1994 }
1995 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1996 *countp = p - buffer;
1997 status = nfs_ok;
1998
1999out:
28e05dd8 2000 kfree(acl);
1da177e4
LT		 2001 if (fhp == &tempfh)
2002 fh_put(&tempfh);
2003 return status;
2004out_nfserr:
b8dd7b9a 2005 status = nfserrno(err);
1da177e4
LT		 2006 goto out;
2007out_resource:
2008 *countp = 0;
2009 status = nfserr_resource;
2010 goto out;
2011out_serverfault:
2012 status = nfserr_serverfault;
2013 goto out;
2014}
2015
c0ce6ec8
BF		 2016static inline int attributes_need_mount(u32 *bmval)
2017{
2018 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2019 return 1;
2020 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2021 return 1;
2022 return 0;
2023}
2024
b37ad28b 2025static __be32
1da177e4 2026nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2ebbc012 2027 const char *name, int namlen, __be32 *p, int *buflen)
1da177e4
LT		 2028{
2029 struct svc_export *exp = cd->rd_fhp->fh_export;
2030 struct dentry *dentry;
b37ad28b 2031 __be32 nfserr;
406a7ea9 2032 int ignore_crossmnt = 0;
1da177e4
LT		 2033
2034 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2035 if (IS_ERR(dentry))
2036 return nfserrno(PTR_ERR(dentry));
2037
2038 exp_get(exp);
406a7ea9
FF		 2039 /*
2040 * In the case of a mountpoint, the client may be asking for
2041 * attributes that are only properties of the underlying filesystem
2042 * as opposed to the cross-mounted file system. In such a case,
2043 * we will not follow the cross mount and will fill the attribtutes
2044 * directly from the mountpoint dentry.
2045 */
c0ce6ec8 2046 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
406a7ea9
FF		 2047 ignore_crossmnt = 1;
2048 else if (d_mountpoint(dentry)) {
021d3a72
BF		 2049 int err;
2050
dcb488a3
AA		 2051 /*
2052 * Why the heck aren't we just using nfsd_lookup??
2053 * Different "."/".." handling? Something else?
2054 * At least, add a comment here to explain....
2055 */
021d3a72
BF		 2056 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2057 if (err) {
2058 nfserr = nfserrno(err);
1da177e4
LT		 2059 goto out_put;
2060 }
dcb488a3
AA		 2061 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2062 if (nfserr)
2063 goto out_put;
1da177e4
LT		 2064
2065 }
2066 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 2067 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2068out_put:
2069 dput(dentry);
2070 exp_put(exp);
2071 return nfserr;
2072}
2073
2ebbc012 2074static __be32 *
b37ad28b 2075nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2076{
2ebbc012 2077 __be32 *attrlenp;
1da177e4
LT		 2078
2079 if (buflen < 6)
2080 return NULL;
2081 *p++ = htonl(2);
2082 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2083 *p++ = htonl(0); /* bmval1 */
2084
2085 attrlenp = p++;
2086 *p++ = nfserr; /* no htonl */
2087 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2088 return p;
2089}
2090
2091static int
a0ad13ef
N		 2092nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2093 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2094{
a0ad13ef 2095 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2096 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2097 int buflen;
2ebbc012 2098 __be32 *p = cd->buffer;
b37ad28b 2099 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2100
2101 /* In nfsv4, "." and ".." never make it onto the wire.. */
2102 if (name && isdotent(name, namlen)) {
2103 cd->common.err = nfs_ok;
2104 return 0;
2105 }
2106
2107 if (cd->offset)
2108 xdr_encode_hyper(cd->offset, (u64) offset);
2109
2110 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2111 if (buflen < 0)
2112 goto fail;
2113
2114 *p++ = xdr_one; /* mark entry present */
2115 cd->offset = p; /* remember pointer */
2116 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2117 p = xdr_encode_array(p, name, namlen); /* name length & name */
2118
2119 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2120 switch (nfserr) {
2121 case nfs_ok:
2122 p += buflen;
2123 break;
2124 case nfserr_resource:
2125 nfserr = nfserr_toosmall;
2126 goto fail;
2127 case nfserr_dropit:
2128 goto fail;
2129 default:
2130 /*
2131 * If the client requested the RDATTR_ERROR attribute,
2132 * we stuff the error code into this attribute
2133 * and continue. If this attribute was not requested,
2134 * then in accordance with the spec, we fail the
2135 * entire READDIR operation(!)
2136 */
2137 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2138 goto fail;
1da177e4 2139 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2140 if (p == NULL) {
2141 nfserr = nfserr_toosmall;
1da177e4 2142 goto fail;
34081efc 2143 }
1da177e4
LT		 2144 }
2145 cd->buflen -= (p - cd->buffer);
2146 cd->buffer = p;
2147 cd->common.err = nfs_ok;
2148 return 0;
2149fail:
2150 cd->common.err = nfserr;
2151 return -EINVAL;
2152}
2153
e2f282b9
BH		 2154static void
2155nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2156{
2157 ENCODE_HEAD;
2158
2159 RESERVE_SPACE(sizeof(stateid_t));
2160 WRITE32(sid->si_generation);
2161 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2162 ADJUST_ARGS();
2163}
2164
695e12f8 2165static __be32
b37ad28b 2166nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4
LT		 2167{
2168 ENCODE_HEAD;
2169
2170 if (!nfserr) {
2171 RESERVE_SPACE(8);
2172 WRITE32(access->ac_supported);
2173 WRITE32(access->ac_resp_access);
2174 ADJUST_ARGS();
2175 }
695e12f8 2176 return nfserr;
1da177e4
LT		 2177}
2178
695e12f8 2179static __be32
b37ad28b 2180nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4
LT		 2181{
2182 ENCODE_SEQID_OP_HEAD;
2183
e2f282b9
BH		 2184 if (!nfserr)
2185 nfsd4_encode_stateid(resp, &close->cl_stateid);
2186
1da177e4 2187 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
695e12f8 2188 return nfserr;
1da177e4
LT		 2189}
2190
2191
695e12f8 2192static __be32
b37ad28b 2193nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4
LT		 2194{
2195 ENCODE_HEAD;
2196
2197 if (!nfserr) {
2198 RESERVE_SPACE(8);
2199 WRITEMEM(commit->co_verf.data, 8);
2200 ADJUST_ARGS();
2201 }
695e12f8 2202 return nfserr;
1da177e4
LT		 2203}
2204
695e12f8 2205static __be32
b37ad28b 2206nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4
LT		 2207{
2208 ENCODE_HEAD;
2209
2210 if (!nfserr) {
2211 RESERVE_SPACE(32);
2212 WRITECINFO(create->cr_cinfo);
2213 WRITE32(2);
2214 WRITE32(create->cr_bmval[0]);
2215 WRITE32(create->cr_bmval[1]);
2216 ADJUST_ARGS();
2217 }
695e12f8 2218 return nfserr;
1da177e4
LT		 2219}
2220
b37ad28b
AV		 2221static __be32
2222nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2223{
2224 struct svc_fh *fhp = getattr->ga_fhp;
2225 int buflen;
2226
2227 if (nfserr)
2228 return nfserr;
2229
2230 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2231 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2232 resp->p, &buflen, getattr->ga_bmval,
406a7ea9 2233 resp->rqstp, 0);
1da177e4
LT		 2234 if (!nfserr)
2235 resp->p += buflen;
2236 return nfserr;
2237}
2238
695e12f8
BH		 2239static __be32
2240nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2241{
695e12f8 2242 struct svc_fh *fhp = *fhpp;
1da177e4
LT		 2243 unsigned int len;
2244 ENCODE_HEAD;
2245
2246 if (!nfserr) {
2247 len = fhp->fh_handle.fh_size;
2248 RESERVE_SPACE(len + 4);
2249 WRITE32(len);
2250 WRITEMEM(&fhp->fh_handle.fh_base, len);
2251 ADJUST_ARGS();
2252 }
695e12f8 2253 return nfserr;
1da177e4
LT		 2254}
2255
2256/*
2257* Including all fields other than the name, a LOCK4denied structure requires
2258* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2259*/
2260static void
2261nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2262{
2263 ENCODE_HEAD;
2264
2265 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2266 WRITE64(ld->ld_start);
2267 WRITE64(ld->ld_length);
2268 WRITE32(ld->ld_type);
2269 if (ld->ld_sop) {
2270 WRITEMEM(&ld->ld_clientid, 8);
2271 WRITE32(ld->ld_sop->so_owner.len);
2272 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2273 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2274 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2275 WRITE64((u64)0); /* clientid */
2276 WRITE32(0); /* length of owner name */
2277 }
2278 ADJUST_ARGS();
2279}
2280
695e12f8 2281static __be32
b37ad28b 2282nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2283{
1da177e4
LT		 2284 ENCODE_SEQID_OP_HEAD;
2285
e2f282b9
BH		 2286 if (!nfserr)
2287 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2288 else if (nfserr == nfserr_denied)
1da177e4
LT		 2289 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2290
3a65588a 2291 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
695e12f8 2292 return nfserr;
1da177e4
LT		 2293}
2294
695e12f8 2295static __be32
b37ad28b 2296nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2297{
2298 if (nfserr == nfserr_denied)
2299 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2300 return nfserr;
1da177e4
LT		 2301}
2302
695e12f8 2303static __be32
b37ad28b 2304nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4
LT		 2305{
2306 ENCODE_SEQID_OP_HEAD;
2307
e2f282b9
BH		 2308 if (!nfserr)
2309 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2310
1da177e4 2311 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
695e12f8 2312 return nfserr;
1da177e4
LT		 2313}
2314
2315
695e12f8 2316static __be32
b37ad28b 2317nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4
LT		 2318{
2319 ENCODE_HEAD;
2320
2321 if (!nfserr) {
2322 RESERVE_SPACE(20);
2323 WRITECINFO(link->li_cinfo);
2324 ADJUST_ARGS();
2325 }
695e12f8 2326 return nfserr;
1da177e4
LT		 2327}
2328
2329
695e12f8 2330static __be32
b37ad28b 2331nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2332{
1b6b2257 2333 ENCODE_HEAD;
1da177e4
LT		 2334 ENCODE_SEQID_OP_HEAD;
2335
2336 if (nfserr)
2337 goto out;
2338
e2f282b9
BH		 2339 nfsd4_encode_stateid(resp, &open->op_stateid);
2340 RESERVE_SPACE(40);
1da177e4
LT		 2341 WRITECINFO(open->op_cinfo);
2342 WRITE32(open->op_rflags);
2343 WRITE32(2);
2344 WRITE32(open->op_bmval[0]);
2345 WRITE32(open->op_bmval[1]);
2346 WRITE32(open->op_delegate_type);
2347 ADJUST_ARGS();
2348
2349 switch (open->op_delegate_type) {
2350 case NFS4_OPEN_DELEGATE_NONE:
2351 break;
2352 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2353 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2354 RESERVE_SPACE(20);
7b190fec 2355 WRITE32(open->op_recall);
1da177e4
LT		 2356
2357 /*
2358 * TODO: ACE's in delegations
2359 */
2360 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2361 WRITE32(0);
2362 WRITE32(0);
2363 WRITE32(0); /* XXX: is NULL principal ok? */
2364 ADJUST_ARGS();
2365 break;
2366 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2367 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2368 RESERVE_SPACE(32);
1da177e4
LT		 2369 WRITE32(0);
2370
2371 /*
2372 * TODO: space_limit's in delegations
2373 */
2374 WRITE32(NFS4_LIMIT_SIZE);
2375 WRITE32(~(u32)0);
2376 WRITE32(~(u32)0);
2377
2378 /*
2379 * TODO: ACE's in delegations
2380 */
2381 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2382 WRITE32(0);
2383 WRITE32(0);
2384 WRITE32(0); /* XXX: is NULL principal ok? */
2385 ADJUST_ARGS();
2386 break;
2387 default:
2388 BUG();
2389 }
2390 /* XXX save filehandle here */
2391out:
2392 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
695e12f8 2393 return nfserr;
1da177e4
LT		 2394}
2395
695e12f8 2396static __be32
b37ad28b 2397nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4
LT		 2398{
2399 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2400
2401 if (!nfserr)
2402 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4
LT		 2403
2404 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
695e12f8 2405 return nfserr;
1da177e4
LT		 2406}
2407
695e12f8 2408static __be32
b37ad28b 2409nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4
LT		 2410{
2411 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2412
2413 if (!nfserr)
2414 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4
LT		 2415
2416 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
695e12f8 2417 return nfserr;
1da177e4
LT		 2418}
2419
b37ad28b
AV		 2420static __be32
2421nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2422 struct nfsd4_read *read)
1da177e4
LT		 2423{
2424 u32 eof;
2425 int v, pn;
2426 unsigned long maxcount;
2427 long len;
2428 ENCODE_HEAD;
2429
2430 if (nfserr)
2431 return nfserr;
2432 if (resp->xbuf->page_len)
2433 return nfserr_resource;
2434
2435 RESERVE_SPACE(8); /* eof flag and byte count */
2436
7adae489 2437 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2438 if (maxcount > read->rd_length)
2439 maxcount = read->rd_length;
2440
2441 len = maxcount;
2442 v = 0;
2443 while (len > 0) {
44524359 2444 pn = resp->rqstp->rq_resused++;
3cc03b16 2445 resp->rqstp->rq_vec[v].iov_base =
44524359 2446 page_address(resp->rqstp->rq_respages[pn]);
3cc03b16 2447 resp->rqstp->rq_vec[v].iov_len =
44524359 2448 len < PAGE_SIZE ? len : PAGE_SIZE;
1da177e4
LT		 2449 v++;
2450 len -= PAGE_SIZE;
2451 }
2452 read->rd_vlen = v;
2453
2454 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2455 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2456 &maxcount);
2457
2458 if (nfserr == nfserr_symlink)
2459 nfserr = nfserr_inval;
2460 if (nfserr)
2461 return nfserr;
44524359
N		 2462 eof = (read->rd_offset + maxcount >=
2463 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2464
2465 WRITE32(eof);
2466 WRITE32(maxcount);
2467 ADJUST_ARGS();
6ed6decc
N		 2468 resp->xbuf->head[0].iov_len = (char*)p
2469 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2470 resp->xbuf->page_len = maxcount;
2471
6ed6decc 2472 /* Use rest of head for padding and remaining ops: */
6ed6decc 2473 resp->xbuf->tail[0].iov_base = p;
1da177e4 2474 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2475 if (maxcount&3) {
6ed6decc
N		 2476 RESERVE_SPACE(4);
2477 WRITE32(0);
1da177e4
LT		 2478 resp->xbuf->tail[0].iov_base += maxcount&3;
2479 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2480 ADJUST_ARGS();
1da177e4
LT		 2481 }
2482 return 0;
2483}
2484
b37ad28b
AV		 2485static __be32
2486nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 2487{
2488 int maxcount;
2489 char *page;
2490 ENCODE_HEAD;
2491
2492 if (nfserr)
2493 return nfserr;
2494 if (resp->xbuf->page_len)
2495 return nfserr_resource;
2496
44524359 2497 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2498
2499 maxcount = PAGE_SIZE;
2500 RESERVE_SPACE(4);
2501
2502 /*
2503 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2504 * if they would overflow the buffer. Is this kosher in NFSv4? If
2505 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2506 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2507 */
2508 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2509 if (nfserr == nfserr_isdir)
2510 return nfserr_inval;
2511 if (nfserr)
2512 return nfserr;
2513
2514 WRITE32(maxcount);
2515 ADJUST_ARGS();
6ed6decc
N		 2516 resp->xbuf->head[0].iov_len = (char*)p
2517 - (char*)resp->xbuf->head[0].iov_base;
2518 resp->xbuf->page_len = maxcount;
1da177e4 2519
6ed6decc 2520 /* Use rest of head for padding and remaining ops: */
6ed6decc 2521 resp->xbuf->tail[0].iov_base = p;
1da177e4 2522 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2523 if (maxcount&3) {
6ed6decc
N		 2524 RESERVE_SPACE(4);
2525 WRITE32(0);
1da177e4
LT		 2526 resp->xbuf->tail[0].iov_base += maxcount&3;
2527 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2528 ADJUST_ARGS();
1da177e4
LT		 2529 }
2530 return 0;
2531}
2532
b37ad28b
AV		 2533static __be32
2534nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 2535{
2536 int maxcount;
2537 loff_t offset;
2ebbc012 2538 __be32 *page, *savep, *tailbase;
1da177e4
LT		 2539 ENCODE_HEAD;
2540
2541 if (nfserr)
2542 return nfserr;
2543 if (resp->xbuf->page_len)
2544 return nfserr_resource;
2545
2546 RESERVE_SPACE(8); /* verifier */
2547 savep = p;
2548
2549 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2550 WRITE32(0);
2551 WRITE32(0);
2552 ADJUST_ARGS();
2553 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 2554 tailbase = p;
1da177e4
LT		 2555
2556 maxcount = PAGE_SIZE;
2557 if (maxcount > readdir->rd_maxcount)
2558 maxcount = readdir->rd_maxcount;
2559
2560 /*
2561 * Convert from bytes to words, account for the two words already
2562 * written, make sure to leave two words at the end for the next
2563 * pointer and eof field.
2564 */
2565 maxcount = (maxcount >> 2) - 4;
2566 if (maxcount < 0) {
2567 nfserr = nfserr_toosmall;
2568 goto err_no_verf;
2569 }
2570
44524359 2571 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2572 readdir->common.err = 0;
2573 readdir->buflen = maxcount;
2574 readdir->buffer = page;
2575 readdir->offset = NULL;
2576
2577 offset = readdir->rd_cookie;
2578 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2579 &offset,
2580 &readdir->common, nfsd4_encode_dirent);
2581 if (nfserr == nfs_ok &&
2582 readdir->common.err == nfserr_toosmall &&
2583 readdir->buffer == page)
2584 nfserr = nfserr_toosmall;
2585 if (nfserr == nfserr_symlink)
2586 nfserr = nfserr_notdir;
2587 if (nfserr)
2588 goto err_no_verf;
2589
2590 if (readdir->offset)
2591 xdr_encode_hyper(readdir->offset, offset);
2592
2593 p = readdir->buffer;
2594 *p++ = 0; /* no more entries */
2595 *p++ = htonl(readdir->common.err == nfserr_eof);
44524359
N		 2596 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2597 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
1da177e4 2598
bb6e8a9f 2599 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 2600 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 2601 resp->xbuf->tail[0].iov_len = 0;
2602 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 2603 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 2604
2605 return 0;
2606err_no_verf:
2607 p = savep;
2608 ADJUST_ARGS();
2609 return nfserr;
2610}
2611
695e12f8 2612static __be32
b37ad28b 2613nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4
LT		 2614{
2615 ENCODE_HEAD;
2616
2617 if (!nfserr) {
2618 RESERVE_SPACE(20);
2619 WRITECINFO(remove->rm_cinfo);
2620 ADJUST_ARGS();
2621 }
695e12f8 2622 return nfserr;
1da177e4
LT		 2623}
2624
695e12f8 2625static __be32
b37ad28b 2626nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4
LT		 2627{
2628 ENCODE_HEAD;
2629
2630 if (!nfserr) {
2631 RESERVE_SPACE(40);
2632 WRITECINFO(rename->rn_sinfo);
2633 WRITECINFO(rename->rn_tinfo);
2634 ADJUST_ARGS();
2635 }
695e12f8 2636 return nfserr;
1da177e4
LT		 2637}
2638
695e12f8 2639static __be32
ca5c8cde 2640nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
dcb488a3
AA		 2641 struct nfsd4_secinfo *secinfo)
2642{
2643 int i = 0;
2644 struct svc_export *exp = secinfo->si_exp;
4796f457
BF		 2645 u32 nflavs;
2646 struct exp_flavor_info *flavs;
2647 struct exp_flavor_info def_flavs[2];
dcb488a3
AA		 2648 ENCODE_HEAD;
2649
2650 if (nfserr)
2651 goto out;
4796f457
BF		 2652 if (exp->ex_nflavors) {
2653 flavs = exp->ex_flavors;
2654 nflavs = exp->ex_nflavors;
2655 } else { /* Handling of some defaults in absence of real secinfo: */
2656 flavs = def_flavs;
2657 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2658 nflavs = 2;
2659 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2660 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2661 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2662 nflavs = 1;
2663 flavs[0].pseudoflavor
2664 = svcauth_gss_flavor(exp->ex_client);
2665 } else {
2666 nflavs = 1;
2667 flavs[0].pseudoflavor
2668 = exp->ex_client->flavour->flavour;
2669 }
2670 }
2671
dcb488a3 2672 RESERVE_SPACE(4);
4796f457 2673 WRITE32(nflavs);
dcb488a3 2674 ADJUST_ARGS();
4796f457
BF		 2675 for (i = 0; i < nflavs; i++) {
2676 u32 flav = flavs[i].pseudoflavor;
dcb488a3
AA		 2677 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2678
2679 if (gm) {
2680 RESERVE_SPACE(4);
2681 WRITE32(RPC_AUTH_GSS);
2682 ADJUST_ARGS();
2683 RESERVE_SPACE(4 + gm->gm_oid.len);
2684 WRITE32(gm->gm_oid.len);
2685 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2686 ADJUST_ARGS();
2687 RESERVE_SPACE(4);
2688 WRITE32(0); /* qop */
2689 ADJUST_ARGS();
2690 RESERVE_SPACE(4);
2691 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2692 ADJUST_ARGS();
2693 gss_mech_put(gm);
2694 } else {
2695 RESERVE_SPACE(4);
2696 WRITE32(flav);
2697 ADJUST_ARGS();
2698 }
2699 }
2700out:
2701 if (exp)
2702 exp_put(exp);
695e12f8 2703 return nfserr;
dcb488a3
AA		 2704}
2705
1da177e4
LT		 2706/*
2707 * The SETATTR encode routine is special -- it always encodes a bitmap,
2708 * regardless of the error status.
2709 */
695e12f8 2710static __be32
b37ad28b 2711nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4
LT		 2712{
2713 ENCODE_HEAD;
2714
2715 RESERVE_SPACE(12);
2716 if (nfserr) {
2717 WRITE32(2);
2718 WRITE32(0);
2719 WRITE32(0);
2720 }
2721 else {
2722 WRITE32(2);
2723 WRITE32(setattr->sa_bmval[0]);
2724 WRITE32(setattr->sa_bmval[1]);
2725 }
2726 ADJUST_ARGS();
695e12f8 2727 return nfserr;
1da177e4
LT		 2728}
2729
695e12f8 2730static __be32
b37ad28b 2731nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4
LT		 2732{
2733 ENCODE_HEAD;
2734
2735 if (!nfserr) {
2736 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2737 WRITEMEM(&scd->se_clientid, 8);
2738 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2739 ADJUST_ARGS();
2740 }
2741 else if (nfserr == nfserr_clid_inuse) {
2742 RESERVE_SPACE(8);
2743 WRITE32(0);
2744 WRITE32(0);
2745 ADJUST_ARGS();
2746 }
695e12f8 2747 return nfserr;
1da177e4
LT		 2748}
2749
695e12f8 2750static __be32
b37ad28b 2751nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4
LT		 2752{
2753 ENCODE_HEAD;
2754
2755 if (!nfserr) {
2756 RESERVE_SPACE(16);
2757 WRITE32(write->wr_bytes_written);
2758 WRITE32(write->wr_how_written);
2759 WRITEMEM(write->wr_verifier.data, 8);
2760 ADJUST_ARGS();
2761 }
695e12f8 2762 return nfserr;
1da177e4
LT		 2763}
2764
2db134eb
AA		 2765static __be32
2766nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2767 struct nfsd4_exchange_id *exid)
2768{
0733d213
AA		 2769 ENCODE_HEAD;
2770 char *major_id;
2771 char *server_scope;
2772 int major_id_sz;
2773 int server_scope_sz;
2774 uint64_t minor_id = 0;
2775
2776 if (nfserr)
2777 return nfserr;
2778
2779 major_id = utsname()->nodename;
2780 major_id_sz = strlen(major_id);
2781 server_scope = utsname()->nodename;
2782 server_scope_sz = strlen(server_scope);
2783
2784 RESERVE_SPACE(
2785 8 /* eir_clientid */ +
2786 4 /* eir_sequenceid */ +
2787 4 /* eir_flags */ +
2788 4 /* spr_how (SP4_NONE) */ +
2789 8 /* so_minor_id */ +
2790 4 /* so_major_id.len */ +
2791 (XDR_QUADLEN(major_id_sz) * 4) +
2792 4 /* eir_server_scope.len */ +
2793 (XDR_QUADLEN(server_scope_sz) * 4) +
2794 4 /* eir_server_impl_id.count (0) */);
2795
2796 WRITEMEM(&exid->clientid, 8);
2797 WRITE32(exid->seqid);
2798 WRITE32(exid->flags);
2799
2800 /* state_protect4_r. Currently only support SP4_NONE */
2801 BUG_ON(exid->spa_how != SP4_NONE);
2802 WRITE32(exid->spa_how);
2803
2804 /* The server_owner struct */
2805 WRITE64(minor_id); /* Minor id */
2806 /* major id */
2807 WRITE32(major_id_sz);
2808 WRITEMEM(major_id, major_id_sz);
2809
2810 /* Server scope */
2811 WRITE32(server_scope_sz);
2812 WRITEMEM(server_scope, server_scope_sz);
2813
2814 /* Implementation id */
2815 WRITE32(0); /* zero length nfs_impl_id4 array */
2816 ADJUST_ARGS();
2817 return 0;
2db134eb
AA		 2818}
2819
2820static __be32
2821nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
2822 struct nfsd4_create_session *sess)
2823{
2824 /* stub */
2825 return nfserr;
2826}
2827
2828static __be32
2829nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
2830 struct nfsd4_destroy_session *destroy_session)
2831{
2832 /* stub */
2833 return nfserr;
2834}
2835
2836static __be32
2837nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
2838 struct nfsd4_sequence *seq)
2839{
b85d4c01
BH		 2840 ENCODE_HEAD;
2841
2842 if (nfserr)
2843 return nfserr;
2844
2845 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
2846 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2847 WRITE32(seq->seqid);
2848 WRITE32(seq->slotid);
2849 WRITE32(seq->maxslots);
2850 /*
2851 * FIXME: for now:
2852 * target_maxslots = maxslots
2853 * status_flags = 0
2854 */
2855 WRITE32(seq->maxslots);
2856 WRITE32(0);
2857
2858 ADJUST_ARGS();
2859 return 0;
2db134eb
AA		 2860}
2861
695e12f8
BH		 2862static __be32
2863nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
2864{
2865 return nfserr;
2866}
2867
2868typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
2869
2db134eb
AA		 2870/*
2871 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
2872 * since we don't need to filter out obsolete ops as this is
2873 * done in the decoding phase.
2874 */
695e12f8 2875static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 2876 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
2877 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
2878 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
2879 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
2880 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
2881 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
2882 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
2883 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
2884 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
2885 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
2886 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
2887 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
2888 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
2889 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
2890 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
2891 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 2892 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 2893 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
2894 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
2895 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
2896 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
2897 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
2898 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
2899 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
2900 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
2901 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
2902 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
2903 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
2904 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
2905 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
2906 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
2907 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
2908 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
2909 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
2910 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
2911 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
2912 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 2913
2914 /* NFSv4.1 operations */
2915 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
2916 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
2917 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
2918 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
2919 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
2920 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2921 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
2922 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
2923 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
2924 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
2925 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
2926 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
2927 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
2928 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
2929 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
2930 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2931 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
2932 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
2933 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 2934};
2935
1da177e4
LT		 2936void
2937nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2938{
2ebbc012 2939 __be32 *statp;
1da177e4
LT		 2940 ENCODE_HEAD;
2941
2942 RESERVE_SPACE(8);
2943 WRITE32(op->opnum);
2944 statp = p++; /* to be backfilled at the end */
2945 ADJUST_ARGS();
2946
695e12f8
BH		 2947 if (op->opnum == OP_ILLEGAL)
2948 goto status;
2949 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
2950 !nfsd4_enc_ops[op->opnum]);
2951 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
2952status:
1da177e4
LT		 2953 /*
2954 * Note: We write the status directly, instead of using WRITE32(),
2955 * since it is already in network byte order.
2956 */
2957 *statp = op->status;
2958}
2959
2960/*
2961 * Encode the reply stored in the stateowner reply cache
2962 *
2963 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2964 * previously sent already encoded operation.
2965 *
2966 * called with nfs4_lock_state() held
2967 */
2968void
2969nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2970{
2971 ENCODE_HEAD;
2972 struct nfs4_replay *rp = op->replay;
2973
2974 BUG_ON(!rp);
2975
2976 RESERVE_SPACE(8);
2977 WRITE32(op->opnum);
2978 *p++ = rp->rp_status; /* already xdr'ed */
2979 ADJUST_ARGS();
2980
2981 RESERVE_SPACE(rp->rp_buflen);
2982 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2983 ADJUST_ARGS();
2984}
2985
2986/*
2987 * END OF "GENERIC" ENCODE ROUTINES.
2988 */
2989
2990int
2ebbc012 2991nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 2992{
2993 return xdr_ressize_check(rqstp, p);
2994}
2995
2996void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2997{
2998 if (args->ops != args->iops) {
2999 kfree(args->ops);
3000 args->ops = args->iops;
3001 }
f99d49ad
JJ		 3002 kfree(args->tmpp);
3003 args->tmpp = NULL;
1da177e4
LT		 3004 while (args->to_free) {
3005 struct tmpbuf *tb = args->to_free;
3006 args->to_free = tb->next;
3007 tb->release(tb->buf);
3008 kfree(tb);
3009 }
3010}
3011
3012int
2ebbc012 3013nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3014{
b37ad28b 3015 __be32 status;
1da177e4
LT		 3016
3017 args->p = p;
3018 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3019 args->pagelist = rqstp->rq_arg.pages;
3020 args->pagelen = rqstp->rq_arg.page_len;
3021 args->tmpp = NULL;
3022 args->to_free = NULL;
3023 args->ops = args->iops;
3024 args->rqstp = rqstp;
3025
3026 status = nfsd4_decode_compound(args);
3027 if (status) {
3028 nfsd4_release_compoundargs(args);
3029 }
3030 return !status;
3031}
3032
3033int
2ebbc012 3034nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3035{
3036 /*
3037 * All that remains is to write the tag and operation count...
3038 */
3039 struct kvec *iov;
3040 p = resp->tagp;
3041 *p++ = htonl(resp->taglen);
3042 memcpy(p, resp->tag, resp->taglen);
3043 p += XDR_QUADLEN(resp->taglen);
3044 *p++ = htonl(resp->opcnt);
3045
3046 if (rqstp->rq_res.page_len)
3047 iov = &rqstp->rq_res.tail[0];
3048 else
3049 iov = &rqstp->rq_res.head[0];
3050 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3051 BUG_ON(iov->iov_len > PAGE_SIZE);
3052 return 1;
3053}
3054
3055/*
3056 * Local variables:
3057 * c-basic-offset: 8
3058 * End:
3059 */
Linux kernel - Deliverables
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