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nfsd41: check encode size for sessions maxresponse cached
[GitHub/mt8127/android_kernel_alcatel_ttab.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{
ec6b5d7b
AA		 1102 DECODE_HEAD;
1103
1104 u32 dummy;
1105 char *machine_name;
1106 int i;
1107 int nr_secflavs;
1108
1109 READ_BUF(16);
1110 COPYMEM(&sess->clientid, 8);
1111 READ32(sess->seqid);
1112 READ32(sess->flags);
1113
1114 /* Fore channel attrs */
1115 READ_BUF(28);
1116 READ32(dummy); /* headerpadsz is always 0 */
1117 READ32(sess->fore_channel.maxreq_sz);
1118 READ32(sess->fore_channel.maxresp_sz);
1119 READ32(sess->fore_channel.maxresp_cached);
1120 READ32(sess->fore_channel.maxops);
1121 READ32(sess->fore_channel.maxreqs);
1122 READ32(sess->fore_channel.nr_rdma_attrs);
1123 if (sess->fore_channel.nr_rdma_attrs == 1) {
1124 READ_BUF(4);
1125 READ32(sess->fore_channel.rdma_attrs);
1126 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1127 dprintk("Too many fore channel attr bitmaps!\n");
1128 goto xdr_error;
1129 }
1130
1131 /* Back channel attrs */
1132 READ_BUF(28);
1133 READ32(dummy); /* headerpadsz is always 0 */
1134 READ32(sess->back_channel.maxreq_sz);
1135 READ32(sess->back_channel.maxresp_sz);
1136 READ32(sess->back_channel.maxresp_cached);
1137 READ32(sess->back_channel.maxops);
1138 READ32(sess->back_channel.maxreqs);
1139 READ32(sess->back_channel.nr_rdma_attrs);
1140 if (sess->back_channel.nr_rdma_attrs == 1) {
1141 READ_BUF(4);
1142 READ32(sess->back_channel.rdma_attrs);
1143 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1144 dprintk("Too many back channel attr bitmaps!\n");
1145 goto xdr_error;
1146 }
1147
1148 READ_BUF(8);
1149 READ32(sess->callback_prog);
1150
1151 /* callback_sec_params4 */
1152 READ32(nr_secflavs);
1153 for (i = 0; i < nr_secflavs; ++i) {
1154 READ_BUF(4);
1155 READ32(dummy);
1156 switch (dummy) {
1157 case RPC_AUTH_NULL:
1158 /* Nothing to read */
1159 break;
1160 case RPC_AUTH_UNIX:
1161 READ_BUF(8);
1162 /* stamp */
1163 READ32(dummy);
1164
1165 /* machine name */
1166 READ32(dummy);
1167 READ_BUF(dummy);
1168 SAVEMEM(machine_name, dummy);
1169
1170 /* uid, gid */
1171 READ_BUF(8);
1172 READ32(sess->uid);
1173 READ32(sess->gid);
1174
1175 /* more gids */
1176 READ_BUF(4);
1177 READ32(dummy);
1178 READ_BUF(dummy * 4);
1179 for (i = 0; i < dummy; ++i)
1180 READ32(dummy);
1181 break;
1182 case RPC_AUTH_GSS:
1183 dprintk("RPC_AUTH_GSS callback secflavor "
1184 "not supported!\n");
1185 READ_BUF(8);
1186 /* gcbp_service */
1187 READ32(dummy);
1188 /* gcbp_handle_from_server */
1189 READ32(dummy);
1190 READ_BUF(dummy);
1191 p += XDR_QUADLEN(dummy);
1192 /* gcbp_handle_from_client */
1193 READ_BUF(4);
1194 READ32(dummy);
1195 READ_BUF(dummy);
1196 p += XDR_QUADLEN(dummy);
1197 break;
1198 default:
1199 dprintk("Illegal callback secflavor\n");
1200 return nfserr_inval;
1201 }
1202 }
1203 DECODE_TAIL;
2db134eb
AA		 1204}
1205
1206static __be32
1207nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1208 struct nfsd4_destroy_session *destroy_session)
1209{
e10e0cfc
BH		 1210 DECODE_HEAD;
1211 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1212 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1213
1214 DECODE_TAIL;
2db134eb
AA		 1215}
1216
1217static __be32
1218nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1219 struct nfsd4_sequence *seq)
1220{
b85d4c01
BH		 1221 DECODE_HEAD;
1222
1223 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1224 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1225 READ32(seq->seqid);
1226 READ32(seq->slotid);
1227 READ32(seq->maxslots);
1228 READ32(seq->cachethis);
1229
1230 DECODE_TAIL;
2db134eb
AA		 1231}
1232
347e0ad9
BH		 1233static __be32
1234nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1235{
1236 return nfs_ok;
1237}
1238
3c375c6f
BH		 1239static __be32
1240nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1241{
1e685ec2 1242 return nfserr_notsupp;
3c375c6f
BH		 1243}
1244
347e0ad9
BH		 1245typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1246
1247static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1248 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1249 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1250 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1251 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1252 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1253 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1254 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1255 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1256 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1257 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1258 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1259 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1260 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1261 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1262 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1263 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1264 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1265 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1266 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1267 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
a1c8c4d1 1268 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
ad1060c8
BF		 1269 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1270 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1271 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1272 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1273 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1274 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1275 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1276 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1277 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1278 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1279 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1280 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1281 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1282 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1283 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1284 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
347e0ad9
BH		 1285};
1286
2db134eb
AA		 1287static nfsd4_dec nfsd41_dec_ops[] = {
1288 [OP_ACCESS] (nfsd4_dec)nfsd4_decode_access,
1289 [OP_CLOSE] (nfsd4_dec)nfsd4_decode_close,
1290 [OP_COMMIT] (nfsd4_dec)nfsd4_decode_commit,
1291 [OP_CREATE] (nfsd4_dec)nfsd4_decode_create,
1292 [OP_DELEGPURGE] (nfsd4_dec)nfsd4_decode_notsupp,
1293 [OP_DELEGRETURN] (nfsd4_dec)nfsd4_decode_delegreturn,
1294 [OP_GETATTR] (nfsd4_dec)nfsd4_decode_getattr,
1295 [OP_GETFH] (nfsd4_dec)nfsd4_decode_noop,
1296 [OP_LINK] (nfsd4_dec)nfsd4_decode_link,
1297 [OP_LOCK] (nfsd4_dec)nfsd4_decode_lock,
1298 [OP_LOCKT] (nfsd4_dec)nfsd4_decode_lockt,
1299 [OP_LOCKU] (nfsd4_dec)nfsd4_decode_locku,
1300 [OP_LOOKUP] (nfsd4_dec)nfsd4_decode_lookup,
1301 [OP_LOOKUPP] (nfsd4_dec)nfsd4_decode_noop,
1302 [OP_NVERIFY] (nfsd4_dec)nfsd4_decode_verify,
1303 [OP_OPEN] (nfsd4_dec)nfsd4_decode_open,
1304 [OP_OPENATTR] (nfsd4_dec)nfsd4_decode_notsupp,
1305 [OP_OPEN_CONFIRM] (nfsd4_dec)nfsd4_decode_notsupp,
1306 [OP_OPEN_DOWNGRADE] (nfsd4_dec)nfsd4_decode_open_downgrade,
1307 [OP_PUTFH] (nfsd4_dec)nfsd4_decode_putfh,
1308 [OP_PUTPUBFH] (nfsd4_dec)nfsd4_decode_notsupp,
1309 [OP_PUTROOTFH] (nfsd4_dec)nfsd4_decode_noop,
1310 [OP_READ] (nfsd4_dec)nfsd4_decode_read,
1311 [OP_READDIR] (nfsd4_dec)nfsd4_decode_readdir,
1312 [OP_READLINK] (nfsd4_dec)nfsd4_decode_noop,
1313 [OP_REMOVE] (nfsd4_dec)nfsd4_decode_remove,
1314 [OP_RENAME] (nfsd4_dec)nfsd4_decode_rename,
1315 [OP_RENEW] (nfsd4_dec)nfsd4_decode_notsupp,
1316 [OP_RESTOREFH] (nfsd4_dec)nfsd4_decode_noop,
1317 [OP_SAVEFH] (nfsd4_dec)nfsd4_decode_noop,
1318 [OP_SECINFO] (nfsd4_dec)nfsd4_decode_secinfo,
1319 [OP_SETATTR] (nfsd4_dec)nfsd4_decode_setattr,
1320 [OP_SETCLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1321 [OP_SETCLIENTID_CONFIRM](nfsd4_dec)nfsd4_decode_notsupp,
1322 [OP_VERIFY] (nfsd4_dec)nfsd4_decode_verify,
1323 [OP_WRITE] (nfsd4_dec)nfsd4_decode_write,
1324 [OP_RELEASE_LOCKOWNER] (nfsd4_dec)nfsd4_decode_notsupp,
1325
1326 /* new operations for NFSv4.1 */
1327 [OP_BACKCHANNEL_CTL] (nfsd4_dec)nfsd4_decode_notsupp,
1328 [OP_BIND_CONN_TO_SESSION](nfsd4_dec)nfsd4_decode_notsupp,
1329 [OP_EXCHANGE_ID] (nfsd4_dec)nfsd4_decode_exchange_id,
1330 [OP_CREATE_SESSION] (nfsd4_dec)nfsd4_decode_create_session,
1331 [OP_DESTROY_SESSION] (nfsd4_dec)nfsd4_decode_destroy_session,
1332 [OP_FREE_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1333 [OP_GET_DIR_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1334 [OP_GETDEVICEINFO] (nfsd4_dec)nfsd4_decode_notsupp,
1335 [OP_GETDEVICELIST] (nfsd4_dec)nfsd4_decode_notsupp,
1336 [OP_LAYOUTCOMMIT] (nfsd4_dec)nfsd4_decode_notsupp,
1337 [OP_LAYOUTGET] (nfsd4_dec)nfsd4_decode_notsupp,
1338 [OP_LAYOUTRETURN] (nfsd4_dec)nfsd4_decode_notsupp,
1339 [OP_SECINFO_NO_NAME] (nfsd4_dec)nfsd4_decode_notsupp,
1340 [OP_SEQUENCE] (nfsd4_dec)nfsd4_decode_sequence,
1341 [OP_SET_SSV] (nfsd4_dec)nfsd4_decode_notsupp,
1342 [OP_TEST_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1343 [OP_WANT_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1344 [OP_DESTROY_CLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1345 [OP_RECLAIM_COMPLETE] (nfsd4_dec)nfsd4_decode_notsupp,
1346};
1347
f2feb96b
BH		 1348struct nfsd4_minorversion_ops {
1349 nfsd4_dec *decoders;
1350 int nops;
1351};
1352
1353static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
ad1060c8 1354 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
2db134eb 1355 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
f2feb96b
BH		 1356};
1357
b37ad28b 1358static __be32
1da177e4
LT		 1359nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1360{
1361 DECODE_HEAD;
1362 struct nfsd4_op *op;
f2feb96b 1363 struct nfsd4_minorversion_ops *ops;
1da177e4
LT		 1364 int i;
1365
1366 /*
1367 * XXX: According to spec, we should check the tag
1368 * for UTF-8 compliance. I'm postponing this for
1369 * now because it seems that some clients do use
1370 * binary tags.
1371 */
1372 READ_BUF(4);
1373 READ32(argp->taglen);
1374 READ_BUF(argp->taglen + 8);
1375 SAVEMEM(argp->tag, argp->taglen);
1376 READ32(argp->minorversion);
1377 READ32(argp->opcnt);
1378
1379 if (argp->taglen > NFSD4_MAX_TAGLEN)
1380 goto xdr_error;
1381 if (argp->opcnt > 100)
1382 goto xdr_error;
1383
e8c96f8c 1384 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1385 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1386 if (!argp->ops) {
1387 argp->ops = argp->iops;
817cb9d4 1388 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1389 goto xdr_error;
1390 }
1391 }
1392
f2feb96b 1393 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
30cff1ff
BH		 1394 argp->opcnt = 0;
1395
f2feb96b 1396 ops = &nfsd4_minorversion[argp->minorversion];
1da177e4
LT		 1397 for (i = 0; i < argp->opcnt; i++) {
1398 op = &argp->ops[i];
1399 op->replay = NULL;
1400
1401 /*
1402 * We can't use READ_BUF() here because we need to handle
1403 * a missing opcode as an OP_WRITE + 1. So we need to check
1404 * to see if we're truly at the end of our buffer or if there
1405 * is another page we need to flip to.
1406 */
1407
1408 if (argp->p == argp->end) {
1409 if (argp->pagelen < 4) {
1410 /* There isn't an opcode still on the wire */
1411 op->opnum = OP_WRITE + 1;
1412 op->status = nfserr_bad_xdr;
1413 argp->opcnt = i+1;
1414 break;
1415 }
1416
1417 /*
1418 * False alarm. We just hit a page boundary, but there
1419 * is still data available. Move pointer across page
1420 * boundary. *snip from READ_BUF*
1421 */
1422 argp->p = page_address(argp->pagelist[0]);
1423 argp->pagelist++;
1424 if (argp->pagelen < PAGE_SIZE) {
1425 argp->end = p + (argp->pagelen>>2);
1426 argp->pagelen = 0;
1427 } else {
1428 argp->end = p + (PAGE_SIZE>>2);
1429 argp->pagelen -= PAGE_SIZE;
1430 }
1431 }
1432 op->opnum = ntohl(*argp->p++);
1433
f2feb96b
BH		 1434 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1435 op->status = ops->decoders[op->opnum](argp, &op->u);
347e0ad9 1436 else {
1da177e4
LT		 1437 op->opnum = OP_ILLEGAL;
1438 op->status = nfserr_op_illegal;
1da177e4
LT		 1439 }
1440
1441 if (op->status) {
1442 argp->opcnt = i+1;
1443 break;
1444 }
1445 }
1446
1447 DECODE_TAIL;
1448}
1449/*
1450 * END OF "GENERIC" DECODE ROUTINES.
1451 */
1452
1453/*
1454 * START OF "GENERIC" ENCODE ROUTINES.
1455 * These may look a little ugly since they are imported from a "generic"
1456 * set of XDR encode/decode routines which are intended to be shared by
1457 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1458 *
1459 * If the pain of reading these is too great, it should be a straightforward
1460 * task to translate them into Linux-specific versions which are more
1461 * consistent with the style used in NFSv2/v3...
1462 */
2ebbc012 1463#define ENCODE_HEAD __be32 *p
1da177e4
LT		 1464
1465#define WRITE32(n) *p++ = htonl(n)
1466#define WRITE64(n) do { \
1467 *p++ = htonl((u32)((n) >> 32)); \
1468 *p++ = htonl((u32)(n)); \
1469} while (0)
5108b276 1470#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1471 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1472 memcpy(p, ptr, nbytes); \
1473 p += XDR_QUADLEN(nbytes); \
5108b276 1474}} while (0)
1da177e4
LT		 1475#define WRITECINFO(c) do { \
1476 *p++ = htonl(c.atomic); \
1477 *p++ = htonl(c.before_ctime_sec); \
1478 *p++ = htonl(c.before_ctime_nsec); \
1479 *p++ = htonl(c.after_ctime_sec); \
1480 *p++ = htonl(c.after_ctime_nsec); \
1481} while (0)
1482
1483#define RESERVE_SPACE(nbytes) do { \
1484 p = resp->p; \
1485 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1486} while (0)
1487#define ADJUST_ARGS() resp->p = p
1488
1489/*
1490 * Header routine to setup seqid operation replay cache
1491 */
1492#define ENCODE_SEQID_OP_HEAD \
2ebbc012 1493 __be32 *save; \
1da177e4
LT		 1494 \
1495 save = resp->p;
1496
1497/*
7fb64cee
N		 1498 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1499 * is where sequence id's are incremented, and the replay cache is filled.
1500 * Note that we increment sequence id's here, at the last moment, so we're sure
1501 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1502 */
1503
1504#define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1505 if (seqid_mutating_err(nfserr) && stateowner) { \
bd9aac52 1506 stateowner->so_seqid++; \
1da177e4
LT		 1507 stateowner->so_replay.rp_status = nfserr; \
1508 stateowner->so_replay.rp_buflen = \
1509 (((char *)(resp)->p - (char *)save)); \
1510 memcpy(stateowner->so_replay.rp_buf, save, \
1511 stateowner->so_replay.rp_buflen); \
1512 } } while (0);
1513
81c3f413
BF		 1514/* Encode as an array of strings the string given with components
1515 * seperated @sep.
1516 */
b37ad28b 1517static __be32 nfsd4_encode_components(char sep, char *components,
2ebbc012 1518 __be32 **pp, int *buflen)
81c3f413 1519{
2ebbc012
AV		 1520 __be32 *p = *pp;
1521 __be32 *countp = p;
81c3f413
BF		 1522 int strlen, count=0;
1523 char *str, *end;
1524
1525 dprintk("nfsd4_encode_components(%s)\n", components);
1526 if ((*buflen -= 4) < 0)
1527 return nfserr_resource;
1528 WRITE32(0); /* We will fill this in with @count later */
1529 end = str = components;
1530 while (*end) {
1531 for (; *end && (*end != sep); end++)
1532 ; /* Point to end of component */
1533 strlen = end - str;
1534 if (strlen) {
1535 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1536 return nfserr_resource;
1537 WRITE32(strlen);
1538 WRITEMEM(str, strlen);
1539 count++;
1540 }
1541 else
1542 end++;
1543 str = end;
1544 }
1545 *pp = p;
1546 p = countp;
1547 WRITE32(count);
1548 return 0;
1549}
1550
1551/*
1552 * encode a location element of a fs_locations structure
1553 */
b37ad28b 1554static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1555 __be32 **pp, int *buflen)
81c3f413 1556{
b37ad28b 1557 __be32 status;
2ebbc012 1558 __be32 *p = *pp;
81c3f413
BF		 1559
1560 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1561 if (status)
1562 return status;
1563 status = nfsd4_encode_components('/', location->path, &p, buflen);
1564 if (status)
1565 return status;
1566 *pp = p;
1567 return 0;
1568}
1569
1570/*
1571 * Return the path to an export point in the pseudo filesystem namespace
1572 * Returned string is safe to use as long as the caller holds a reference
1573 * to @exp.
1574 */
b37ad28b 1575static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
81c3f413
BF		 1576{
1577 struct svc_fh tmp_fh;
1578 char *path, *rootpath;
81c3f413
BF		 1579
1580 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb 1581 *stat = exp_pseudoroot(rqstp, &tmp_fh);
cc45f017
AV		 1582 if (*stat)
1583 return NULL;
54775491 1584 rootpath = tmp_fh.fh_export->ex_pathname;
81c3f413 1585
54775491 1586 path = exp->ex_pathname;
81c3f413
BF		 1587
1588 if (strncmp(path, rootpath, strlen(rootpath))) {
817cb9d4 1589 dprintk("nfsd: fs_locations failed;"
81c3f413 1590 "%s is not contained in %s\n", path, rootpath);
cc45f017
AV		 1591 *stat = nfserr_notsupp;
1592 return NULL;
81c3f413
BF		 1593 }
1594
1595 return path + strlen(rootpath);
1596}
1597
1598/*
1599 * encode a fs_locations structure
1600 */
b37ad28b 1601static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1602 struct svc_export *exp,
2ebbc012 1603 __be32 **pp, int *buflen)
81c3f413 1604{
b37ad28b 1605 __be32 status;
cc45f017 1606 int i;
2ebbc012 1607 __be32 *p = *pp;
81c3f413 1608 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
cc45f017 1609 char *root = nfsd4_path(rqstp, exp, &status);
81c3f413 1610
cc45f017
AV		 1611 if (status)
1612 return status;
81c3f413
BF		 1613 status = nfsd4_encode_components('/', root, &p, buflen);
1614 if (status)
1615 return status;
1616 if ((*buflen -= 4) < 0)
1617 return nfserr_resource;
1618 WRITE32(fslocs->locations_count);
1619 for (i=0; i<fslocs->locations_count; i++) {
1620 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1621 &p, buflen);
1622 if (status)
1623 return status;
1624 }
1625 *pp = p;
1626 return 0;
1627}
1da177e4
LT		 1628
1629static u32 nfs4_ftypes[16] = {
1630 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1631 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1632 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1633 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1634};
1635
b37ad28b 1636static __be32
1da177e4 1637nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1638 __be32 **p, int *buflen)
1da177e4
LT		 1639{
1640 int status;
1641
1642 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1643 return nfserr_resource;
1644 if (whotype != NFS4_ACL_WHO_NAMED)
1645 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1646 else if (group)
1647 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1648 else
1649 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1650 if (status < 0)
1651 return nfserrno(status);
1652 *p = xdr_encode_opaque(*p, NULL, status);
1653 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1654 BUG_ON(*buflen < 0);
1655 return 0;
1656}
1657
b37ad28b 1658static inline __be32
2ebbc012 1659nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1da177e4
LT		 1660{
1661 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1662}
1663
b37ad28b 1664static inline __be32
2ebbc012 1665nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1da177e4
LT		 1666{
1667 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1668}
1669
b37ad28b 1670static inline __be32
1da177e4 1671nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1672 __be32 **p, int *buflen)
1da177e4
LT		 1673{
1674 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1675}
1676
42ca0993
BF		 1677#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1678 FATTR4_WORD0_RDATTR_ERROR)
1679#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1680
b37ad28b 1681static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1682{
1683 /* As per referral draft: */
1684 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1685 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1686 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1687 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1688 *rdattr_err = NFSERR_MOVED;
1689 else
1690 return nfserr_moved;
1691 }
1692 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1693 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1694 return 0;
1695}
1da177e4
LT		 1696
1697/*
1698 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1699 * ourselves.
1700 *
1701 * @countp is the buffer size in _words_; upon successful return this becomes
1702 * replaced with the number of words written.
1703 */
b37ad28b 1704__be32
1da177e4 1705nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2ebbc012 1706 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
406a7ea9 1707 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 1708{
1709 u32 bmval0 = bmval[0];
1710 u32 bmval1 = bmval[1];
1711 struct kstat stat;
1712 struct svc_fh tempfh;
1713 struct kstatfs statfs;
1714 int buflen = *countp << 2;
2ebbc012 1715 __be32 *attrlenp;
1da177e4
LT		 1716 u32 dummy;
1717 u64 dummy64;
42ca0993 1718 u32 rdattr_err = 0;
2ebbc012 1719 __be32 *p = buffer;
b37ad28b 1720 __be32 status;
b8dd7b9a 1721 int err;
1da177e4
LT		 1722 int aclsupport = 0;
1723 struct nfs4_acl *acl = NULL;
1724
1725 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1726 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1727 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1728
42ca0993
BF		 1729 if (exp->ex_fslocs.migrated) {
1730 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1731 if (status)
1732 goto out;
1733 }
1734
54775491 1735 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
b8dd7b9a 1736 if (err)
1da177e4 1737 goto out_nfserr;
a16e92ed
BF		 1738 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1739 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 1740 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1741 FATTR4_WORD1_SPACE_TOTAL))) {
b8dd7b9a
AV		 1742 err = vfs_statfs(dentry, &statfs);
1743 if (err)
1da177e4
LT		 1744 goto out_nfserr;
1745 }
1746 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1747 fh_init(&tempfh, NFS4_FHSIZE);
1748 status = fh_compose(&tempfh, exp, dentry, NULL);
1749 if (status)
1750 goto out;
1751 fhp = &tempfh;
1752 }
1753 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1754 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 1755 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1756 aclsupport = (err == 0);
1da177e4 1757 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 1758 if (err == -EOPNOTSUPP)
1da177e4 1759 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 1760 else if (err == -EINVAL) {
1da177e4
LT		 1761 status = nfserr_attrnotsupp;
1762 goto out;
b8dd7b9a 1763 } else if (err != 0)
1da177e4
LT		 1764 goto out_nfserr;
1765 }
1766 }
81c3f413
BF		 1767 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1768 if (exp->ex_fslocs.locations == NULL) {
1769 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1770 }
1771 }
1da177e4
LT		 1772 if ((buflen -= 16) < 0)
1773 goto out_resource;
1774
1775 WRITE32(2);
1776 WRITE32(bmval0);
1777 WRITE32(bmval1);
1778 attrlenp = p++; /* to be backfilled later */
1779
1780 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
42ca0993 1781 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1da177e4
LT		 1782 if ((buflen -= 12) < 0)
1783 goto out_resource;
42ca0993
BF		 1784 if (!aclsupport)
1785 word0 &= ~FATTR4_WORD0_ACL;
1786 if (!exp->ex_fslocs.locations)
1787 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1da177e4 1788 WRITE32(2);
42ca0993 1789 WRITE32(word0);
1da177e4
LT		 1790 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1791 }
1792 if (bmval0 & FATTR4_WORD0_TYPE) {
1793 if ((buflen -= 4) < 0)
1794 goto out_resource;
1795 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1796 if (dummy == NF4BAD)
1797 goto out_serverfault;
1798 WRITE32(dummy);
1799 }
1800 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1801 if ((buflen -= 4) < 0)
1802 goto out_resource;
49640001 1803 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 1804 WRITE32(NFS4_FH_PERSISTENT);
49640001 1805 else
e34ac862 1806 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 1807 }
1808 if (bmval0 & FATTR4_WORD0_CHANGE) {
1809 /*
1810 * Note: This _must_ be consistent with the scheme for writing
1811 * change_info, so any changes made here must be reflected there
1812 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1813 * macro above.)
1814 */
1815 if ((buflen -= 8) < 0)
1816 goto out_resource;
1817 WRITE32(stat.ctime.tv_sec);
1818 WRITE32(stat.ctime.tv_nsec);
1819 }
1820 if (bmval0 & FATTR4_WORD0_SIZE) {
1821 if ((buflen -= 8) < 0)
1822 goto out_resource;
1823 WRITE64(stat.size);
1824 }
1825 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1826 if ((buflen -= 4) < 0)
1827 goto out_resource;
1828 WRITE32(1);
1829 }
1830 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1831 if ((buflen -= 4) < 0)
1832 goto out_resource;
1833 WRITE32(1);
1834 }
1835 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1836 if ((buflen -= 4) < 0)
1837 goto out_resource;
1838 WRITE32(0);
1839 }
1840 if (bmval0 & FATTR4_WORD0_FSID) {
1841 if ((buflen -= 16) < 0)
1842 goto out_resource;
42ca0993
BF		 1843 if (exp->ex_fslocs.migrated) {
1844 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1845 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 1846 } else switch(fsid_source(fhp)) {
1847 case FSIDSOURCE_FSID:
1da177e4
LT		 1848 WRITE64((u64)exp->ex_fsid);
1849 WRITE64((u64)0);
af6a4e28
N		 1850 break;
1851 case FSIDSOURCE_DEV:
1da177e4
LT		 1852 WRITE32(0);
1853 WRITE32(MAJOR(stat.dev));
1854 WRITE32(0);
1855 WRITE32(MINOR(stat.dev));
af6a4e28
N		 1856 break;
1857 case FSIDSOURCE_UUID:
1858 WRITEMEM(exp->ex_uuid, 16);
1859 break;
1da177e4
LT		 1860 }
1861 }
1862 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1863 if ((buflen -= 4) < 0)
1864 goto out_resource;
1865 WRITE32(0);
1866 }
1867 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1868 if ((buflen -= 4) < 0)
1869 goto out_resource;
1870 WRITE32(NFSD_LEASE_TIME);
1871 }
1872 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1873 if ((buflen -= 4) < 0)
1874 goto out_resource;
42ca0993 1875 WRITE32(rdattr_err);
1da177e4
LT		 1876 }
1877 if (bmval0 & FATTR4_WORD0_ACL) {
1878 struct nfs4_ace *ace;
1da177e4
LT		 1879
1880 if (acl == NULL) {
1881 if ((buflen -= 4) < 0)
1882 goto out_resource;
1883
1884 WRITE32(0);
1885 goto out_acl;
1886 }
1887 if ((buflen -= 4) < 0)
1888 goto out_resource;
1889 WRITE32(acl->naces);
1890
28e05dd8 1891 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 1892 if ((buflen -= 4*3) < 0)
1893 goto out_resource;
1894 WRITE32(ace->type);
1895 WRITE32(ace->flag);
1896 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1897 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1898 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1899 &p, &buflen);
1900 if (status == nfserr_resource)
1901 goto out_resource;
1902 if (status)
1903 goto out;
1904 }
1905 }
1906out_acl:
1907 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1908 if ((buflen -= 4) < 0)
1909 goto out_resource;
1910 WRITE32(aclsupport ?
1911 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1912 }
1913 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1914 if ((buflen -= 4) < 0)
1915 goto out_resource;
1916 WRITE32(1);
1917 }
1918 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1919 if ((buflen -= 4) < 0)
1920 goto out_resource;
1921 WRITE32(1);
1922 }
1923 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1924 if ((buflen -= 4) < 0)
1925 goto out_resource;
1926 WRITE32(1);
1927 }
1928 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1929 if ((buflen -= 4) < 0)
1930 goto out_resource;
1931 WRITE32(1);
1932 }
1933 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1934 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1935 if (buflen < 0)
1936 goto out_resource;
1937 WRITE32(fhp->fh_handle.fh_size);
1938 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1939 }
1940 if (bmval0 & FATTR4_WORD0_FILEID) {
1941 if ((buflen -= 8) < 0)
1942 goto out_resource;
40ee5dc6 1943 WRITE64(stat.ino);
1da177e4
LT		 1944 }
1945 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1946 if ((buflen -= 8) < 0)
1947 goto out_resource;
1948 WRITE64((u64) statfs.f_ffree);
1949 }
1950 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1951 if ((buflen -= 8) < 0)
1952 goto out_resource;
1953 WRITE64((u64) statfs.f_ffree);
1954 }
1955 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1956 if ((buflen -= 8) < 0)
1957 goto out_resource;
1958 WRITE64((u64) statfs.f_files);
1959 }
81c3f413
BF		 1960 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1961 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1962 if (status == nfserr_resource)
1963 goto out_resource;
1964 if (status)
1965 goto out;
1966 }
1da177e4
LT		 1967 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1968 if ((buflen -= 4) < 0)
1969 goto out_resource;
1970 WRITE32(1);
1971 }
1972 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1973 if ((buflen -= 8) < 0)
1974 goto out_resource;
1975 WRITE64(~(u64)0);
1976 }
1977 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1978 if ((buflen -= 4) < 0)
1979 goto out_resource;
1980 WRITE32(255);
1981 }
1982 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1983 if ((buflen -= 4) < 0)
1984 goto out_resource;
a16e92ed 1985 WRITE32(statfs.f_namelen);
1da177e4
LT		 1986 }
1987 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1988 if ((buflen -= 8) < 0)
1989 goto out_resource;
7adae489 1990 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 1991 }
1992 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1993 if ((buflen -= 8) < 0)
1994 goto out_resource;
7adae489 1995 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 1996 }
1997 if (bmval1 & FATTR4_WORD1_MODE) {
1998 if ((buflen -= 4) < 0)
1999 goto out_resource;
2000 WRITE32(stat.mode & S_IALLUGO);
2001 }
2002 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2003 if ((buflen -= 4) < 0)
2004 goto out_resource;
2005 WRITE32(1);
2006 }
2007 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2008 if ((buflen -= 4) < 0)
2009 goto out_resource;
2010 WRITE32(stat.nlink);
2011 }
2012 if (bmval1 & FATTR4_WORD1_OWNER) {
2013 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2014 if (status == nfserr_resource)
2015 goto out_resource;
2016 if (status)
2017 goto out;
2018 }
2019 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2020 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2021 if (status == nfserr_resource)
2022 goto out_resource;
2023 if (status)
2024 goto out;
2025 }
2026 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2027 if ((buflen -= 8) < 0)
2028 goto out_resource;
2029 WRITE32((u32) MAJOR(stat.rdev));
2030 WRITE32((u32) MINOR(stat.rdev));
2031 }
2032 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2033 if ((buflen -= 8) < 0)
2034 goto out_resource;
2035 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2036 WRITE64(dummy64);
2037 }
2038 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2039 if ((buflen -= 8) < 0)
2040 goto out_resource;
2041 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2042 WRITE64(dummy64);
2043 }
2044 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2045 if ((buflen -= 8) < 0)
2046 goto out_resource;
2047 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2048 WRITE64(dummy64);
2049 }
2050 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2051 if ((buflen -= 8) < 0)
2052 goto out_resource;
2053 dummy64 = (u64)stat.blocks << 9;
2054 WRITE64(dummy64);
2055 }
2056 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2057 if ((buflen -= 12) < 0)
2058 goto out_resource;
2059 WRITE32(0);
2060 WRITE32(stat.atime.tv_sec);
2061 WRITE32(stat.atime.tv_nsec);
2062 }
2063 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2064 if ((buflen -= 12) < 0)
2065 goto out_resource;
2066 WRITE32(0);
2067 WRITE32(1);
2068 WRITE32(0);
2069 }
2070 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2071 if ((buflen -= 12) < 0)
2072 goto out_resource;
2073 WRITE32(0);
2074 WRITE32(stat.ctime.tv_sec);
2075 WRITE32(stat.ctime.tv_nsec);
2076 }
2077 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2078 if ((buflen -= 12) < 0)
2079 goto out_resource;
2080 WRITE32(0);
2081 WRITE32(stat.mtime.tv_sec);
2082 WRITE32(stat.mtime.tv_nsec);
2083 }
2084 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 2085 if ((buflen -= 8) < 0)
2086 goto out_resource;
406a7ea9
FF		 2087 /*
2088 * Get parent's attributes if not ignoring crossmount
2089 * and this is the root of a cross-mounted filesystem.
2090 */
2091 if (ignore_crossmnt == 0 &&
54775491
JB		 2092 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
2093 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
2094 exp->ex_path.mnt->mnt_mountpoint, &stat);
40ee5dc6
PS		 2095 if (err)
2096 goto out_nfserr;
2097 }
2098 WRITE64(stat.ino);
1da177e4
LT		 2099 }
2100 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2101 *countp = p - buffer;
2102 status = nfs_ok;
2103
2104out:
28e05dd8 2105 kfree(acl);
1da177e4
LT		 2106 if (fhp == &tempfh)
2107 fh_put(&tempfh);
2108 return status;
2109out_nfserr:
b8dd7b9a 2110 status = nfserrno(err);
1da177e4
LT		 2111 goto out;
2112out_resource:
2113 *countp = 0;
2114 status = nfserr_resource;
2115 goto out;
2116out_serverfault:
2117 status = nfserr_serverfault;
2118 goto out;
2119}
2120
c0ce6ec8
BF		 2121static inline int attributes_need_mount(u32 *bmval)
2122{
2123 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2124 return 1;
2125 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2126 return 1;
2127 return 0;
2128}
2129
b37ad28b 2130static __be32
1da177e4 2131nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2ebbc012 2132 const char *name, int namlen, __be32 *p, int *buflen)
1da177e4
LT		 2133{
2134 struct svc_export *exp = cd->rd_fhp->fh_export;
2135 struct dentry *dentry;
b37ad28b 2136 __be32 nfserr;
406a7ea9 2137 int ignore_crossmnt = 0;
1da177e4
LT		 2138
2139 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2140 if (IS_ERR(dentry))
2141 return nfserrno(PTR_ERR(dentry));
2142
2143 exp_get(exp);
406a7ea9
FF		 2144 /*
2145 * In the case of a mountpoint, the client may be asking for
2146 * attributes that are only properties of the underlying filesystem
2147 * as opposed to the cross-mounted file system. In such a case,
2148 * we will not follow the cross mount and will fill the attribtutes
2149 * directly from the mountpoint dentry.
2150 */
c0ce6ec8 2151 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
406a7ea9
FF		 2152 ignore_crossmnt = 1;
2153 else if (d_mountpoint(dentry)) {
021d3a72
BF		 2154 int err;
2155
dcb488a3
AA		 2156 /*
2157 * Why the heck aren't we just using nfsd_lookup??
2158 * Different "."/".." handling? Something else?
2159 * At least, add a comment here to explain....
2160 */
021d3a72
BF		 2161 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2162 if (err) {
2163 nfserr = nfserrno(err);
1da177e4
LT		 2164 goto out_put;
2165 }
dcb488a3
AA		 2166 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2167 if (nfserr)
2168 goto out_put;
1da177e4
LT		 2169
2170 }
2171 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 2172 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2173out_put:
2174 dput(dentry);
2175 exp_put(exp);
2176 return nfserr;
2177}
2178
2ebbc012 2179static __be32 *
b37ad28b 2180nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2181{
2ebbc012 2182 __be32 *attrlenp;
1da177e4
LT		 2183
2184 if (buflen < 6)
2185 return NULL;
2186 *p++ = htonl(2);
2187 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2188 *p++ = htonl(0); /* bmval1 */
2189
2190 attrlenp = p++;
2191 *p++ = nfserr; /* no htonl */
2192 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2193 return p;
2194}
2195
2196static int
a0ad13ef
N		 2197nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2198 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2199{
a0ad13ef 2200 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2201 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2202 int buflen;
2ebbc012 2203 __be32 *p = cd->buffer;
b37ad28b 2204 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2205
2206 /* In nfsv4, "." and ".." never make it onto the wire.. */
2207 if (name && isdotent(name, namlen)) {
2208 cd->common.err = nfs_ok;
2209 return 0;
2210 }
2211
2212 if (cd->offset)
2213 xdr_encode_hyper(cd->offset, (u64) offset);
2214
2215 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2216 if (buflen < 0)
2217 goto fail;
2218
2219 *p++ = xdr_one; /* mark entry present */
2220 cd->offset = p; /* remember pointer */
2221 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2222 p = xdr_encode_array(p, name, namlen); /* name length & name */
2223
2224 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2225 switch (nfserr) {
2226 case nfs_ok:
2227 p += buflen;
2228 break;
2229 case nfserr_resource:
2230 nfserr = nfserr_toosmall;
2231 goto fail;
2232 case nfserr_dropit:
2233 goto fail;
2234 default:
2235 /*
2236 * If the client requested the RDATTR_ERROR attribute,
2237 * we stuff the error code into this attribute
2238 * and continue. If this attribute was not requested,
2239 * then in accordance with the spec, we fail the
2240 * entire READDIR operation(!)
2241 */
2242 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2243 goto fail;
1da177e4 2244 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2245 if (p == NULL) {
2246 nfserr = nfserr_toosmall;
1da177e4 2247 goto fail;
34081efc 2248 }
1da177e4
LT		 2249 }
2250 cd->buflen -= (p - cd->buffer);
2251 cd->buffer = p;
2252 cd->common.err = nfs_ok;
2253 return 0;
2254fail:
2255 cd->common.err = nfserr;
2256 return -EINVAL;
2257}
2258
e2f282b9
BH		 2259static void
2260nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2261{
2262 ENCODE_HEAD;
2263
2264 RESERVE_SPACE(sizeof(stateid_t));
2265 WRITE32(sid->si_generation);
2266 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2267 ADJUST_ARGS();
2268}
2269
695e12f8 2270static __be32
b37ad28b 2271nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4
LT		 2272{
2273 ENCODE_HEAD;
2274
2275 if (!nfserr) {
2276 RESERVE_SPACE(8);
2277 WRITE32(access->ac_supported);
2278 WRITE32(access->ac_resp_access);
2279 ADJUST_ARGS();
2280 }
695e12f8 2281 return nfserr;
1da177e4
LT		 2282}
2283
695e12f8 2284static __be32
b37ad28b 2285nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4
LT		 2286{
2287 ENCODE_SEQID_OP_HEAD;
2288
e2f282b9
BH		 2289 if (!nfserr)
2290 nfsd4_encode_stateid(resp, &close->cl_stateid);
2291
1da177e4 2292 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
695e12f8 2293 return nfserr;
1da177e4
LT		 2294}
2295
2296
695e12f8 2297static __be32
b37ad28b 2298nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4
LT		 2299{
2300 ENCODE_HEAD;
2301
2302 if (!nfserr) {
2303 RESERVE_SPACE(8);
2304 WRITEMEM(commit->co_verf.data, 8);
2305 ADJUST_ARGS();
2306 }
695e12f8 2307 return nfserr;
1da177e4
LT		 2308}
2309
695e12f8 2310static __be32
b37ad28b 2311nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4
LT		 2312{
2313 ENCODE_HEAD;
2314
2315 if (!nfserr) {
2316 RESERVE_SPACE(32);
2317 WRITECINFO(create->cr_cinfo);
2318 WRITE32(2);
2319 WRITE32(create->cr_bmval[0]);
2320 WRITE32(create->cr_bmval[1]);
2321 ADJUST_ARGS();
2322 }
695e12f8 2323 return nfserr;
1da177e4
LT		 2324}
2325
b37ad28b
AV		 2326static __be32
2327nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2328{
2329 struct svc_fh *fhp = getattr->ga_fhp;
2330 int buflen;
2331
2332 if (nfserr)
2333 return nfserr;
2334
2335 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2336 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2337 resp->p, &buflen, getattr->ga_bmval,
406a7ea9 2338 resp->rqstp, 0);
1da177e4
LT		 2339 if (!nfserr)
2340 resp->p += buflen;
2341 return nfserr;
2342}
2343
695e12f8
BH		 2344static __be32
2345nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2346{
695e12f8 2347 struct svc_fh *fhp = *fhpp;
1da177e4
LT		 2348 unsigned int len;
2349 ENCODE_HEAD;
2350
2351 if (!nfserr) {
2352 len = fhp->fh_handle.fh_size;
2353 RESERVE_SPACE(len + 4);
2354 WRITE32(len);
2355 WRITEMEM(&fhp->fh_handle.fh_base, len);
2356 ADJUST_ARGS();
2357 }
695e12f8 2358 return nfserr;
1da177e4
LT		 2359}
2360
2361/*
2362* Including all fields other than the name, a LOCK4denied structure requires
2363* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2364*/
2365static void
2366nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2367{
2368 ENCODE_HEAD;
2369
2370 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2371 WRITE64(ld->ld_start);
2372 WRITE64(ld->ld_length);
2373 WRITE32(ld->ld_type);
2374 if (ld->ld_sop) {
2375 WRITEMEM(&ld->ld_clientid, 8);
2376 WRITE32(ld->ld_sop->so_owner.len);
2377 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2378 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2379 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2380 WRITE64((u64)0); /* clientid */
2381 WRITE32(0); /* length of owner name */
2382 }
2383 ADJUST_ARGS();
2384}
2385
695e12f8 2386static __be32
b37ad28b 2387nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2388{
1da177e4
LT		 2389 ENCODE_SEQID_OP_HEAD;
2390
e2f282b9
BH		 2391 if (!nfserr)
2392 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2393 else if (nfserr == nfserr_denied)
1da177e4
LT		 2394 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2395
3a65588a 2396 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
695e12f8 2397 return nfserr;
1da177e4
LT		 2398}
2399
695e12f8 2400static __be32
b37ad28b 2401nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2402{
2403 if (nfserr == nfserr_denied)
2404 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2405 return nfserr;
1da177e4
LT		 2406}
2407
695e12f8 2408static __be32
b37ad28b 2409nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4
LT		 2410{
2411 ENCODE_SEQID_OP_HEAD;
2412
e2f282b9
BH		 2413 if (!nfserr)
2414 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2415
1da177e4 2416 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
695e12f8 2417 return nfserr;
1da177e4
LT		 2418}
2419
2420
695e12f8 2421static __be32
b37ad28b 2422nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4
LT		 2423{
2424 ENCODE_HEAD;
2425
2426 if (!nfserr) {
2427 RESERVE_SPACE(20);
2428 WRITECINFO(link->li_cinfo);
2429 ADJUST_ARGS();
2430 }
695e12f8 2431 return nfserr;
1da177e4
LT		 2432}
2433
2434
695e12f8 2435static __be32
b37ad28b 2436nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2437{
1b6b2257 2438 ENCODE_HEAD;
1da177e4
LT		 2439 ENCODE_SEQID_OP_HEAD;
2440
2441 if (nfserr)
2442 goto out;
2443
e2f282b9
BH		 2444 nfsd4_encode_stateid(resp, &open->op_stateid);
2445 RESERVE_SPACE(40);
1da177e4
LT		 2446 WRITECINFO(open->op_cinfo);
2447 WRITE32(open->op_rflags);
2448 WRITE32(2);
2449 WRITE32(open->op_bmval[0]);
2450 WRITE32(open->op_bmval[1]);
2451 WRITE32(open->op_delegate_type);
2452 ADJUST_ARGS();
2453
2454 switch (open->op_delegate_type) {
2455 case NFS4_OPEN_DELEGATE_NONE:
2456 break;
2457 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2458 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2459 RESERVE_SPACE(20);
7b190fec 2460 WRITE32(open->op_recall);
1da177e4
LT		 2461
2462 /*
2463 * TODO: ACE's in delegations
2464 */
2465 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2466 WRITE32(0);
2467 WRITE32(0);
2468 WRITE32(0); /* XXX: is NULL principal ok? */
2469 ADJUST_ARGS();
2470 break;
2471 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2472 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2473 RESERVE_SPACE(32);
1da177e4
LT		 2474 WRITE32(0);
2475
2476 /*
2477 * TODO: space_limit's in delegations
2478 */
2479 WRITE32(NFS4_LIMIT_SIZE);
2480 WRITE32(~(u32)0);
2481 WRITE32(~(u32)0);
2482
2483 /*
2484 * TODO: ACE's in delegations
2485 */
2486 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2487 WRITE32(0);
2488 WRITE32(0);
2489 WRITE32(0); /* XXX: is NULL principal ok? */
2490 ADJUST_ARGS();
2491 break;
2492 default:
2493 BUG();
2494 }
2495 /* XXX save filehandle here */
2496out:
2497 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
695e12f8 2498 return nfserr;
1da177e4
LT		 2499}
2500
695e12f8 2501static __be32
b37ad28b 2502nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4
LT		 2503{
2504 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2505
2506 if (!nfserr)
2507 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4
LT		 2508
2509 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
695e12f8 2510 return nfserr;
1da177e4
LT		 2511}
2512
695e12f8 2513static __be32
b37ad28b 2514nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4
LT		 2515{
2516 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2517
2518 if (!nfserr)
2519 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4
LT		 2520
2521 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
695e12f8 2522 return nfserr;
1da177e4
LT		 2523}
2524
b37ad28b
AV		 2525static __be32
2526nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2527 struct nfsd4_read *read)
1da177e4
LT		 2528{
2529 u32 eof;
2530 int v, pn;
2531 unsigned long maxcount;
2532 long len;
2533 ENCODE_HEAD;
2534
2535 if (nfserr)
2536 return nfserr;
2537 if (resp->xbuf->page_len)
2538 return nfserr_resource;
2539
2540 RESERVE_SPACE(8); /* eof flag and byte count */
2541
7adae489 2542 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2543 if (maxcount > read->rd_length)
2544 maxcount = read->rd_length;
2545
2546 len = maxcount;
2547 v = 0;
2548 while (len > 0) {
44524359 2549 pn = resp->rqstp->rq_resused++;
3cc03b16 2550 resp->rqstp->rq_vec[v].iov_base =
44524359 2551 page_address(resp->rqstp->rq_respages[pn]);
3cc03b16 2552 resp->rqstp->rq_vec[v].iov_len =
44524359 2553 len < PAGE_SIZE ? len : PAGE_SIZE;
1da177e4
LT		 2554 v++;
2555 len -= PAGE_SIZE;
2556 }
2557 read->rd_vlen = v;
2558
2559 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2560 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2561 &maxcount);
2562
2563 if (nfserr == nfserr_symlink)
2564 nfserr = nfserr_inval;
2565 if (nfserr)
2566 return nfserr;
44524359
N		 2567 eof = (read->rd_offset + maxcount >=
2568 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2569
2570 WRITE32(eof);
2571 WRITE32(maxcount);
2572 ADJUST_ARGS();
6ed6decc
N		 2573 resp->xbuf->head[0].iov_len = (char*)p
2574 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2575 resp->xbuf->page_len = maxcount;
2576
6ed6decc 2577 /* Use rest of head for padding and remaining ops: */
6ed6decc 2578 resp->xbuf->tail[0].iov_base = p;
1da177e4 2579 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2580 if (maxcount&3) {
6ed6decc
N		 2581 RESERVE_SPACE(4);
2582 WRITE32(0);
1da177e4
LT		 2583 resp->xbuf->tail[0].iov_base += maxcount&3;
2584 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2585 ADJUST_ARGS();
1da177e4
LT		 2586 }
2587 return 0;
2588}
2589
b37ad28b
AV		 2590static __be32
2591nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 2592{
2593 int maxcount;
2594 char *page;
2595 ENCODE_HEAD;
2596
2597 if (nfserr)
2598 return nfserr;
2599 if (resp->xbuf->page_len)
2600 return nfserr_resource;
2601
44524359 2602 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2603
2604 maxcount = PAGE_SIZE;
2605 RESERVE_SPACE(4);
2606
2607 /*
2608 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2609 * if they would overflow the buffer. Is this kosher in NFSv4? If
2610 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2611 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2612 */
2613 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2614 if (nfserr == nfserr_isdir)
2615 return nfserr_inval;
2616 if (nfserr)
2617 return nfserr;
2618
2619 WRITE32(maxcount);
2620 ADJUST_ARGS();
6ed6decc
N		 2621 resp->xbuf->head[0].iov_len = (char*)p
2622 - (char*)resp->xbuf->head[0].iov_base;
2623 resp->xbuf->page_len = maxcount;
1da177e4 2624
6ed6decc 2625 /* Use rest of head for padding and remaining ops: */
6ed6decc 2626 resp->xbuf->tail[0].iov_base = p;
1da177e4 2627 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2628 if (maxcount&3) {
6ed6decc
N		 2629 RESERVE_SPACE(4);
2630 WRITE32(0);
1da177e4
LT		 2631 resp->xbuf->tail[0].iov_base += maxcount&3;
2632 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2633 ADJUST_ARGS();
1da177e4
LT		 2634 }
2635 return 0;
2636}
2637
b37ad28b
AV		 2638static __be32
2639nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 2640{
2641 int maxcount;
2642 loff_t offset;
2ebbc012 2643 __be32 *page, *savep, *tailbase;
1da177e4
LT		 2644 ENCODE_HEAD;
2645
2646 if (nfserr)
2647 return nfserr;
2648 if (resp->xbuf->page_len)
2649 return nfserr_resource;
2650
2651 RESERVE_SPACE(8); /* verifier */
2652 savep = p;
2653
2654 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2655 WRITE32(0);
2656 WRITE32(0);
2657 ADJUST_ARGS();
2658 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 2659 tailbase = p;
1da177e4
LT		 2660
2661 maxcount = PAGE_SIZE;
2662 if (maxcount > readdir->rd_maxcount)
2663 maxcount = readdir->rd_maxcount;
2664
2665 /*
2666 * Convert from bytes to words, account for the two words already
2667 * written, make sure to leave two words at the end for the next
2668 * pointer and eof field.
2669 */
2670 maxcount = (maxcount >> 2) - 4;
2671 if (maxcount < 0) {
2672 nfserr = nfserr_toosmall;
2673 goto err_no_verf;
2674 }
2675
44524359 2676 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2677 readdir->common.err = 0;
2678 readdir->buflen = maxcount;
2679 readdir->buffer = page;
2680 readdir->offset = NULL;
2681
2682 offset = readdir->rd_cookie;
2683 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2684 &offset,
2685 &readdir->common, nfsd4_encode_dirent);
2686 if (nfserr == nfs_ok &&
2687 readdir->common.err == nfserr_toosmall &&
2688 readdir->buffer == page)
2689 nfserr = nfserr_toosmall;
2690 if (nfserr == nfserr_symlink)
2691 nfserr = nfserr_notdir;
2692 if (nfserr)
2693 goto err_no_verf;
2694
2695 if (readdir->offset)
2696 xdr_encode_hyper(readdir->offset, offset);
2697
2698 p = readdir->buffer;
2699 *p++ = 0; /* no more entries */
2700 *p++ = htonl(readdir->common.err == nfserr_eof);
44524359
N		 2701 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2702 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
1da177e4 2703
bb6e8a9f 2704 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 2705 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 2706 resp->xbuf->tail[0].iov_len = 0;
2707 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 2708 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 2709
2710 return 0;
2711err_no_verf:
2712 p = savep;
2713 ADJUST_ARGS();
2714 return nfserr;
2715}
2716
695e12f8 2717static __be32
b37ad28b 2718nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4
LT		 2719{
2720 ENCODE_HEAD;
2721
2722 if (!nfserr) {
2723 RESERVE_SPACE(20);
2724 WRITECINFO(remove->rm_cinfo);
2725 ADJUST_ARGS();
2726 }
695e12f8 2727 return nfserr;
1da177e4
LT		 2728}
2729
695e12f8 2730static __be32
b37ad28b 2731nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4
LT		 2732{
2733 ENCODE_HEAD;
2734
2735 if (!nfserr) {
2736 RESERVE_SPACE(40);
2737 WRITECINFO(rename->rn_sinfo);
2738 WRITECINFO(rename->rn_tinfo);
2739 ADJUST_ARGS();
2740 }
695e12f8 2741 return nfserr;
1da177e4
LT		 2742}
2743
695e12f8 2744static __be32
ca5c8cde 2745nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
dcb488a3
AA		 2746 struct nfsd4_secinfo *secinfo)
2747{
2748 int i = 0;
2749 struct svc_export *exp = secinfo->si_exp;
4796f457
BF		 2750 u32 nflavs;
2751 struct exp_flavor_info *flavs;
2752 struct exp_flavor_info def_flavs[2];
dcb488a3
AA		 2753 ENCODE_HEAD;
2754
2755 if (nfserr)
2756 goto out;
4796f457
BF		 2757 if (exp->ex_nflavors) {
2758 flavs = exp->ex_flavors;
2759 nflavs = exp->ex_nflavors;
2760 } else { /* Handling of some defaults in absence of real secinfo: */
2761 flavs = def_flavs;
2762 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2763 nflavs = 2;
2764 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2765 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2766 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2767 nflavs = 1;
2768 flavs[0].pseudoflavor
2769 = svcauth_gss_flavor(exp->ex_client);
2770 } else {
2771 nflavs = 1;
2772 flavs[0].pseudoflavor
2773 = exp->ex_client->flavour->flavour;
2774 }
2775 }
2776
dcb488a3 2777 RESERVE_SPACE(4);
4796f457 2778 WRITE32(nflavs);
dcb488a3 2779 ADJUST_ARGS();
4796f457
BF		 2780 for (i = 0; i < nflavs; i++) {
2781 u32 flav = flavs[i].pseudoflavor;
dcb488a3
AA		 2782 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2783
2784 if (gm) {
2785 RESERVE_SPACE(4);
2786 WRITE32(RPC_AUTH_GSS);
2787 ADJUST_ARGS();
2788 RESERVE_SPACE(4 + gm->gm_oid.len);
2789 WRITE32(gm->gm_oid.len);
2790 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2791 ADJUST_ARGS();
2792 RESERVE_SPACE(4);
2793 WRITE32(0); /* qop */
2794 ADJUST_ARGS();
2795 RESERVE_SPACE(4);
2796 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2797 ADJUST_ARGS();
2798 gss_mech_put(gm);
2799 } else {
2800 RESERVE_SPACE(4);
2801 WRITE32(flav);
2802 ADJUST_ARGS();
2803 }
2804 }
2805out:
2806 if (exp)
2807 exp_put(exp);
695e12f8 2808 return nfserr;
dcb488a3
AA		 2809}
2810
1da177e4
LT		 2811/*
2812 * The SETATTR encode routine is special -- it always encodes a bitmap,
2813 * regardless of the error status.
2814 */
695e12f8 2815static __be32
b37ad28b 2816nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4
LT		 2817{
2818 ENCODE_HEAD;
2819
2820 RESERVE_SPACE(12);
2821 if (nfserr) {
2822 WRITE32(2);
2823 WRITE32(0);
2824 WRITE32(0);
2825 }
2826 else {
2827 WRITE32(2);
2828 WRITE32(setattr->sa_bmval[0]);
2829 WRITE32(setattr->sa_bmval[1]);
2830 }
2831 ADJUST_ARGS();
695e12f8 2832 return nfserr;
1da177e4
LT		 2833}
2834
695e12f8 2835static __be32
b37ad28b 2836nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4
LT		 2837{
2838 ENCODE_HEAD;
2839
2840 if (!nfserr) {
2841 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2842 WRITEMEM(&scd->se_clientid, 8);
2843 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2844 ADJUST_ARGS();
2845 }
2846 else if (nfserr == nfserr_clid_inuse) {
2847 RESERVE_SPACE(8);
2848 WRITE32(0);
2849 WRITE32(0);
2850 ADJUST_ARGS();
2851 }
695e12f8 2852 return nfserr;
1da177e4
LT		 2853}
2854
695e12f8 2855static __be32
b37ad28b 2856nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4
LT		 2857{
2858 ENCODE_HEAD;
2859
2860 if (!nfserr) {
2861 RESERVE_SPACE(16);
2862 WRITE32(write->wr_bytes_written);
2863 WRITE32(write->wr_how_written);
2864 WRITEMEM(write->wr_verifier.data, 8);
2865 ADJUST_ARGS();
2866 }
695e12f8 2867 return nfserr;
1da177e4
LT		 2868}
2869
2db134eb
AA		 2870static __be32
2871nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2872 struct nfsd4_exchange_id *exid)
2873{
0733d213
AA		 2874 ENCODE_HEAD;
2875 char *major_id;
2876 char *server_scope;
2877 int major_id_sz;
2878 int server_scope_sz;
2879 uint64_t minor_id = 0;
2880
2881 if (nfserr)
2882 return nfserr;
2883
2884 major_id = utsname()->nodename;
2885 major_id_sz = strlen(major_id);
2886 server_scope = utsname()->nodename;
2887 server_scope_sz = strlen(server_scope);
2888
2889 RESERVE_SPACE(
2890 8 /* eir_clientid */ +
2891 4 /* eir_sequenceid */ +
2892 4 /* eir_flags */ +
2893 4 /* spr_how (SP4_NONE) */ +
2894 8 /* so_minor_id */ +
2895 4 /* so_major_id.len */ +
2896 (XDR_QUADLEN(major_id_sz) * 4) +
2897 4 /* eir_server_scope.len */ +
2898 (XDR_QUADLEN(server_scope_sz) * 4) +
2899 4 /* eir_server_impl_id.count (0) */);
2900
2901 WRITEMEM(&exid->clientid, 8);
2902 WRITE32(exid->seqid);
2903 WRITE32(exid->flags);
2904
2905 /* state_protect4_r. Currently only support SP4_NONE */
2906 BUG_ON(exid->spa_how != SP4_NONE);
2907 WRITE32(exid->spa_how);
2908
2909 /* The server_owner struct */
2910 WRITE64(minor_id); /* Minor id */
2911 /* major id */
2912 WRITE32(major_id_sz);
2913 WRITEMEM(major_id, major_id_sz);
2914
2915 /* Server scope */
2916 WRITE32(server_scope_sz);
2917 WRITEMEM(server_scope, server_scope_sz);
2918
2919 /* Implementation id */
2920 WRITE32(0); /* zero length nfs_impl_id4 array */
2921 ADJUST_ARGS();
2922 return 0;
2db134eb
AA		 2923}
2924
2925static __be32
2926nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
2927 struct nfsd4_create_session *sess)
2928{
ec6b5d7b
AA		 2929 ENCODE_HEAD;
2930
2931 if (nfserr)
2932 return nfserr;
2933
2934 RESERVE_SPACE(24);
2935 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2936 WRITE32(sess->seqid);
2937 WRITE32(sess->flags);
2938 ADJUST_ARGS();
2939
2940 RESERVE_SPACE(28);
2941 WRITE32(0); /* headerpadsz */
2942 WRITE32(sess->fore_channel.maxreq_sz);
2943 WRITE32(sess->fore_channel.maxresp_sz);
2944 WRITE32(sess->fore_channel.maxresp_cached);
2945 WRITE32(sess->fore_channel.maxops);
2946 WRITE32(sess->fore_channel.maxreqs);
2947 WRITE32(sess->fore_channel.nr_rdma_attrs);
2948 ADJUST_ARGS();
2949
2950 if (sess->fore_channel.nr_rdma_attrs) {
2951 RESERVE_SPACE(4);
2952 WRITE32(sess->fore_channel.rdma_attrs);
2953 ADJUST_ARGS();
2954 }
2955
2956 RESERVE_SPACE(28);
2957 WRITE32(0); /* headerpadsz */
2958 WRITE32(sess->back_channel.maxreq_sz);
2959 WRITE32(sess->back_channel.maxresp_sz);
2960 WRITE32(sess->back_channel.maxresp_cached);
2961 WRITE32(sess->back_channel.maxops);
2962 WRITE32(sess->back_channel.maxreqs);
2963 WRITE32(sess->back_channel.nr_rdma_attrs);
2964 ADJUST_ARGS();
2965
2966 if (sess->back_channel.nr_rdma_attrs) {
2967 RESERVE_SPACE(4);
2968 WRITE32(sess->back_channel.rdma_attrs);
2969 ADJUST_ARGS();
2970 }
2971 return 0;
2db134eb
AA		 2972}
2973
2974static __be32
2975nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
2976 struct nfsd4_destroy_session *destroy_session)
2977{
2db134eb
AA		 2978 return nfserr;
2979}
2980
bf864a31 2981__be32
2db134eb
AA		 2982nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
2983 struct nfsd4_sequence *seq)
2984{
b85d4c01
BH		 2985 ENCODE_HEAD;
2986
2987 if (nfserr)
2988 return nfserr;
2989
2990 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
2991 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2992 WRITE32(seq->seqid);
2993 WRITE32(seq->slotid);
2994 WRITE32(seq->maxslots);
2995 /*
2996 * FIXME: for now:
2997 * target_maxslots = maxslots
2998 * status_flags = 0
2999 */
3000 WRITE32(seq->maxslots);
3001 WRITE32(0);
3002
3003 ADJUST_ARGS();
3004 return 0;
2db134eb
AA		 3005}
3006
695e12f8
BH		 3007static __be32
3008nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3009{
3010 return nfserr;
3011}
3012
3013typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3014
2db134eb
AA		 3015/*
3016 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3017 * since we don't need to filter out obsolete ops as this is
3018 * done in the decoding phase.
3019 */
695e12f8 3020static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3021 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3022 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3023 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3024 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3025 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3026 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3027 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3028 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3029 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3030 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3031 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3032 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3033 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3034 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3035 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3036 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3037 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3038 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3039 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3040 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3041 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3042 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3043 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3044 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3045 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3046 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3047 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3048 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3049 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3050 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3051 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3052 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3053 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3054 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3055 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3056 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3057 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3058
3059 /* NFSv4.1 operations */
3060 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3061 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3062 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3063 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3064 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3065 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3066 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3067 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3068 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3069 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3070 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3071 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3072 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
3073 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3074 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3075 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3076 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3077 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3078 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3079};
3080
496c262c
AA		 3081/*
3082 * Calculate the total amount of memory that the compound response has taken
3083 * after encoding the current operation.
3084 *
3085 * pad: add on 8 bytes for the next operation's op_code and status so that
3086 * there is room to cache a failure on the next operation.
3087 *
3088 * Compare this length to the session se_fmaxresp_cached.
3089 *
3090 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3091 * will be at least a page and will therefore hold the xdr_buf head.
3092 */
3093static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3094{
3095 int status = 0;
3096 struct xdr_buf *xb = &resp->rqstp->rq_res;
3097 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3098 struct nfsd4_session *session = NULL;
3099 struct nfsd4_slot *slot = resp->cstate.slot;
3100 u32 length, tlen = 0, pad = 8;
3101
3102 if (!nfsd4_has_session(&resp->cstate))
3103 return status;
3104
3105 session = resp->cstate.session;
3106 if (session == NULL || slot->sl_cache_entry.ce_cachethis == 0)
3107 return status;
3108
3109 if (resp->opcnt >= args->opcnt)
3110 pad = 0; /* this is the last operation */
3111
3112 if (xb->page_len == 0) {
3113 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3114 } else {
3115 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3116 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3117
3118 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3119 }
3120 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3121 length, xb->page_len, tlen, pad);
3122
3123 if (length <= session->se_fmaxresp_cached)
3124 return status;
3125 else
3126 return nfserr_rep_too_big_to_cache;
3127}
3128
1da177e4
LT		 3129void
3130nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3131{
2ebbc012 3132 __be32 *statp;
1da177e4
LT		 3133 ENCODE_HEAD;
3134
3135 RESERVE_SPACE(8);
3136 WRITE32(op->opnum);
3137 statp = p++; /* to be backfilled at the end */
3138 ADJUST_ARGS();
3139
695e12f8
BH		 3140 if (op->opnum == OP_ILLEGAL)
3141 goto status;
3142 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3143 !nfsd4_enc_ops[op->opnum]);
3144 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
496c262c
AA		 3145 /* nfsd4_check_drc_limit guarantees enough room for error status */
3146 if (!op->status && nfsd4_check_drc_limit(resp))
3147 op->status = nfserr_rep_too_big_to_cache;
695e12f8 3148status:
1da177e4
LT		 3149 /*
3150 * Note: We write the status directly, instead of using WRITE32(),
3151 * since it is already in network byte order.
3152 */
3153 *statp = op->status;
3154}
3155
3156/*
3157 * Encode the reply stored in the stateowner reply cache
3158 *
3159 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3160 * previously sent already encoded operation.
3161 *
3162 * called with nfs4_lock_state() held
3163 */
3164void
3165nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3166{
3167 ENCODE_HEAD;
3168 struct nfs4_replay *rp = op->replay;
3169
3170 BUG_ON(!rp);
3171
3172 RESERVE_SPACE(8);
3173 WRITE32(op->opnum);
3174 *p++ = rp->rp_status; /* already xdr'ed */
3175 ADJUST_ARGS();
3176
3177 RESERVE_SPACE(rp->rp_buflen);
3178 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3179 ADJUST_ARGS();
3180}
3181
3182/*
3183 * END OF "GENERIC" ENCODE ROUTINES.
3184 */
3185
3186int
2ebbc012 3187nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3188{
3189 return xdr_ressize_check(rqstp, p);
3190}
3191
3192void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3193{
3194 if (args->ops != args->iops) {
3195 kfree(args->ops);
3196 args->ops = args->iops;
3197 }
f99d49ad
JJ		 3198 kfree(args->tmpp);
3199 args->tmpp = NULL;
1da177e4
LT		 3200 while (args->to_free) {
3201 struct tmpbuf *tb = args->to_free;
3202 args->to_free = tb->next;
3203 tb->release(tb->buf);
3204 kfree(tb);
3205 }
3206}
3207
3208int
2ebbc012 3209nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3210{
b37ad28b 3211 __be32 status;
1da177e4
LT		 3212
3213 args->p = p;
3214 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3215 args->pagelist = rqstp->rq_arg.pages;
3216 args->pagelen = rqstp->rq_arg.page_len;
3217 args->tmpp = NULL;
3218 args->to_free = NULL;
3219 args->ops = args->iops;
3220 args->rqstp = rqstp;
3221
3222 status = nfsd4_decode_compound(args);
3223 if (status) {
3224 nfsd4_release_compoundargs(args);
3225 }
3226 return !status;
3227}
3228
3229int
2ebbc012 3230nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3231{
3232 /*
3233 * All that remains is to write the tag and operation count...
3234 */
3235 struct kvec *iov;
3236 p = resp->tagp;
3237 *p++ = htonl(resp->taglen);
3238 memcpy(p, resp->tag, resp->taglen);
3239 p += XDR_QUADLEN(resp->taglen);
3240 *p++ = htonl(resp->opcnt);
3241
3242 if (rqstp->rq_res.page_len)
3243 iov = &rqstp->rq_res.tail[0];
3244 else
3245 iov = &rqstp->rq_res.head[0];
3246 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3247 BUG_ON(iov->iov_len > PAGE_SIZE);
6668958f 3248 if (nfsd4_has_session(&resp->cstate)) {
bf864a31
AA		 3249 if (resp->cstate.status == nfserr_replay_cache &&
3250 !nfsd4_not_cached(resp)) {
da3846a2
AA		 3251 iov->iov_len = resp->cstate.iovlen;
3252 } else {
3253 nfsd4_store_cache_entry(resp);
3254 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3255 resp->cstate.slot->sl_inuse = 0;
3256 }
3257 if (resp->cstate.session)
3258 nfsd4_put_session(resp->cstate.session);
3259 }
1da177e4
LT		 3260 return 1;
3261}
3262
3263/*
3264 * Local variables:
3265 * c-basic-offset: 8
3266 * End:
3267 */
kernel source for telekom puls (alcatel/mediatek)