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knfsd: remove unreported filehandle stats counters
[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
1da177e4 86#define DECODE_HEAD \
2ebbc012 87 __be32 *p; \
b37ad28b 88 __be32 status
1da177e4
LT		 89#define DECODE_TAIL \
90 status = 0; \
91out: \
92 return status; \
93xdr_error: \
817cb9d4
CL		 94 dprintk("NFSD: xdr error (%s:%d)\n", \
95 __FILE__, __LINE__); \
1da177e4
LT		 96 status = nfserr_bad_xdr; \
97 goto out
98
99#define READ32(x) (x) = ntohl(*p++)
100#define READ64(x) do { \
101 (x) = (u64)ntohl(*p++) << 32; \
102 (x) |= ntohl(*p++); \
103} while (0)
104#define READTIME(x) do { \
105 p++; \
106 (x) = ntohl(*p++); \
107 p++; \
108} while (0)
109#define READMEM(x,nbytes) do { \
110 x = (char *)p; \
111 p += XDR_QUADLEN(nbytes); \
112} while (0)
113#define SAVEMEM(x,nbytes) do { \
114 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
115 savemem(argp, p, nbytes) : \
116 (char *)p)) { \
817cb9d4
CL		 117 dprintk("NFSD: xdr error (%s:%d)\n", \
118 __FILE__, __LINE__); \
1da177e4
LT		 119 goto xdr_error; \
120 } \
121 p += XDR_QUADLEN(nbytes); \
122} while (0)
123#define COPYMEM(x,nbytes) do { \
124 memcpy((x), p, nbytes); \
125 p += XDR_QUADLEN(nbytes); \
126} while (0)
127
128/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
129#define READ_BUF(nbytes) do { \
130 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
131 p = argp->p; \
132 argp->p += XDR_QUADLEN(nbytes); \
133 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 134 dprintk("NFSD: xdr error (%s:%d)\n", \
135 __FILE__, __LINE__); \
1da177e4
LT		 136 goto xdr_error; \
137 } \
138} while (0)
139
ca2a05aa 140static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 141{
142 /* We want more bytes than seem to be available.
143 * Maybe we need a new page, maybe we have just run out
144 */
ca2a05aa 145 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 146 __be32 *p;
1da177e4
LT		 147 if (avail + argp->pagelen < nbytes)
148 return NULL;
149 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
150 return NULL;
151 /* ok, we can do it with the current plus the next page */
152 if (nbytes <= sizeof(argp->tmp))
153 p = argp->tmp;
154 else {
f99d49ad 155 kfree(argp->tmpp);
1da177e4
LT		 156 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
157 if (!p)
158 return NULL;
159
160 }
ca2a05aa
BF		 161 /*
162 * The following memcpy is safe because read_buf is always
163 * called with nbytes > avail, and the two cases above both
164 * guarantee p points to at least nbytes bytes.
165 */
1da177e4
LT		 166 memcpy(p, argp->p, avail);
167 /* step to next page */
168 argp->p = page_address(argp->pagelist[0]);
169 argp->pagelist++;
170 if (argp->pagelen < PAGE_SIZE) {
171 argp->end = p + (argp->pagelen>>2);
172 argp->pagelen = 0;
173 } else {
174 argp->end = p + (PAGE_SIZE>>2);
175 argp->pagelen -= PAGE_SIZE;
176 }
177 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
178 argp->p += XDR_QUADLEN(nbytes - avail);
179 return p;
180}
181
60adfc50
AA		 182static int zero_clientid(clientid_t *clid)
183{
184 return (clid->cl_boot == 0) && (clid->cl_id == 0);
185}
186
1da177e4
LT		 187static int
188defer_free(struct nfsd4_compoundargs *argp,
189 void (*release)(const void *), void *p)
190{
191 struct tmpbuf *tb;
192
193 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
194 if (!tb)
195 return -ENOMEM;
196 tb->buf = p;
197 tb->release = release;
198 tb->next = argp->to_free;
199 argp->to_free = tb;
200 return 0;
201}
202
2ebbc012 203static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 204{
1da177e4 205 if (p == argp->tmp) {
a4db5fe5
BF		 206 p = kmalloc(nbytes, GFP_KERNEL);
207 if (!p)
208 return NULL;
1da177e4
LT		 209 memcpy(p, argp->tmp, nbytes);
210 } else {
73dff8be 211 BUG_ON(p != argp->tmpp);
1da177e4
LT		 212 argp->tmpp = NULL;
213 }
214 if (defer_free(argp, kfree, p)) {
a4db5fe5 215 kfree(p);
1da177e4
LT		 216 return NULL;
217 } else
218 return (char *)p;
219}
220
b37ad28b 221static __be32
1da177e4
LT		 222nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
223{
224 u32 bmlen;
225 DECODE_HEAD;
226
227 bmval[0] = 0;
228 bmval[1] = 0;
7e705706 229 bmval[2] = 0;
1da177e4
LT		 230
231 READ_BUF(4);
232 READ32(bmlen);
233 if (bmlen > 1000)
234 goto xdr_error;
235
236 READ_BUF(bmlen << 2);
237 if (bmlen > 0)
238 READ32(bmval[0]);
239 if (bmlen > 1)
240 READ32(bmval[1]);
7e705706
AA		 241 if (bmlen > 2)
242 READ32(bmval[2]);
1da177e4
LT		 243
244 DECODE_TAIL;
245}
246
c0d6fc8a
BH		 247static u32 nfsd_attrmask[] = {
248 NFSD_WRITEABLE_ATTRS_WORD0,
7e705706
AA		 249 NFSD_WRITEABLE_ATTRS_WORD1,
250 NFSD_WRITEABLE_ATTRS_WORD2
c0d6fc8a
BH		 251};
252
79fb54ab
BH		 253static u32 nfsd41_ex_attrmask[] = {
254 NFSD_SUPPATTR_EXCLCREAT_WORD0,
255 NFSD_SUPPATTR_EXCLCREAT_WORD1,
256 NFSD_SUPPATTR_EXCLCREAT_WORD2
257};
258
b37ad28b 259static __be32
c0d6fc8a
BH		 260nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, u32 *writable,
261 struct iattr *iattr, struct nfs4_acl **acl)
1da177e4
LT		 262{
263 int expected_len, len = 0;
264 u32 dummy32;
265 char *buf;
b8dd7b9a 266 int host_err;
1da177e4
LT		 267
268 DECODE_HEAD;
269 iattr->ia_valid = 0;
270 if ((status = nfsd4_decode_bitmap(argp, bmval)))
271 return status;
272
273 /*
f34f9242 274 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP;
1da177e4
LT		 275 * read-only attributes return ERR_INVAL.
276 */
7e705706
AA		 277 if ((bmval[0] & ~nfsd_suppattrs0(argp->minorversion)) ||
278 (bmval[1] & ~nfsd_suppattrs1(argp->minorversion)) ||
279 (bmval[2] & ~nfsd_suppattrs2(argp->minorversion)))
1da177e4 280 return nfserr_attrnotsupp;
7e705706
AA		 281 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
282 (bmval[2] & ~writable[2]))
1da177e4
LT		 283 return nfserr_inval;
284
285 READ_BUF(4);
286 READ32(expected_len);
287
288 if (bmval[0] & FATTR4_WORD0_SIZE) {
289 READ_BUF(8);
290 len += 8;
291 READ64(iattr->ia_size);
292 iattr->ia_valid |= ATTR_SIZE;
293 }
294 if (bmval[0] & FATTR4_WORD0_ACL) {
28e05dd8
BF		 295 int nace;
296 struct nfs4_ace *ace;
1da177e4
LT		 297
298 READ_BUF(4); len += 4;
299 READ32(nace);
300
28e05dd8
BF		 301 if (nace > NFS4_ACL_MAX)
302 return nfserr_resource;
303
304 *acl = nfs4_acl_new(nace);
1da177e4 305 if (*acl == NULL) {
b8dd7b9a 306 host_err = -ENOMEM;
1da177e4
LT		 307 goto out_nfserr;
308 }
28e05dd8 309 defer_free(argp, kfree, *acl);
1da177e4 310
28e05dd8
BF		 311 (*acl)->naces = nace;
312 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 313 READ_BUF(16); len += 16;
28e05dd8
BF		 314 READ32(ace->type);
315 READ32(ace->flag);
316 READ32(ace->access_mask);
1da177e4
LT		 317 READ32(dummy32);
318 READ_BUF(dummy32);
319 len += XDR_QUADLEN(dummy32) << 2;
320 READMEM(buf, dummy32);
28e05dd8 321 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
b8dd7b9a 322 host_err = 0;
28e05dd8
BF		 323 if (ace->whotype != NFS4_ACL_WHO_NAMED)
324 ace->who = 0;
325 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
b8dd7b9a 326 host_err = nfsd_map_name_to_gid(argp->rqstp,
28e05dd8 327 buf, dummy32, &ace->who);
1da177e4 328 else
b8dd7b9a 329 host_err = nfsd_map_name_to_uid(argp->rqstp,
28e05dd8 330 buf, dummy32, &ace->who);
b8dd7b9a 331 if (host_err)
1da177e4 332 goto out_nfserr;
1da177e4
LT		 333 }
334 } else
335 *acl = NULL;
336 if (bmval[1] & FATTR4_WORD1_MODE) {
337 READ_BUF(4);
338 len += 4;
339 READ32(iattr->ia_mode);
340 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
341 iattr->ia_valid |= ATTR_MODE;
342 }
343 if (bmval[1] & FATTR4_WORD1_OWNER) {
344 READ_BUF(4);
345 len += 4;
346 READ32(dummy32);
347 READ_BUF(dummy32);
348 len += (XDR_QUADLEN(dummy32) << 2);
349 READMEM(buf, dummy32);
b8dd7b9a 350 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
1da177e4
LT		 351 goto out_nfserr;
352 iattr->ia_valid |= ATTR_UID;
353 }
354 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
355 READ_BUF(4);
356 len += 4;
357 READ32(dummy32);
358 READ_BUF(dummy32);
359 len += (XDR_QUADLEN(dummy32) << 2);
360 READMEM(buf, dummy32);
b8dd7b9a 361 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
1da177e4
LT		 362 goto out_nfserr;
363 iattr->ia_valid |= ATTR_GID;
364 }
365 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
366 READ_BUF(4);
367 len += 4;
368 READ32(dummy32);
369 switch (dummy32) {
370 case NFS4_SET_TO_CLIENT_TIME:
371 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
372 all 32 bits of 'nseconds'. */
373 READ_BUF(12);
374 len += 12;
375 READ32(dummy32);
376 if (dummy32)
377 return nfserr_inval;
378 READ32(iattr->ia_atime.tv_sec);
379 READ32(iattr->ia_atime.tv_nsec);
380 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
381 return nfserr_inval;
382 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
383 break;
384 case NFS4_SET_TO_SERVER_TIME:
385 iattr->ia_valid |= ATTR_ATIME;
386 break;
387 default:
388 goto xdr_error;
389 }
390 }
1da177e4
LT		 391 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
392 READ_BUF(4);
393 len += 4;
394 READ32(dummy32);
395 switch (dummy32) {
396 case NFS4_SET_TO_CLIENT_TIME:
397 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
398 all 32 bits of 'nseconds'. */
399 READ_BUF(12);
400 len += 12;
401 READ32(dummy32);
402 if (dummy32)
403 return nfserr_inval;
404 READ32(iattr->ia_mtime.tv_sec);
405 READ32(iattr->ia_mtime.tv_nsec);
406 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
407 return nfserr_inval;
408 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
409 break;
410 case NFS4_SET_TO_SERVER_TIME:
411 iattr->ia_valid |= ATTR_MTIME;
412 break;
413 default:
414 goto xdr_error;
415 }
416 }
7e705706 417 BUG_ON(bmval[2]); /* no such writeable attr supported yet */
1da177e4
LT		 418 if (len != expected_len)
419 goto xdr_error;
420
421 DECODE_TAIL;
422
423out_nfserr:
b8dd7b9a 424 status = nfserrno(host_err);
1da177e4
LT		 425 goto out;
426}
427
e31a1b66
BH		 428static __be32
429nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
430{
431 DECODE_HEAD;
432
433 READ_BUF(sizeof(stateid_t));
434 READ32(sid->si_generation);
435 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
436
437 DECODE_TAIL;
438}
439
b37ad28b 440static __be32
1da177e4
LT		 441nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
442{
443 DECODE_HEAD;
444
445 READ_BUF(4);
446 READ32(access->ac_req_access);
447
448 DECODE_TAIL;
449}
450
b37ad28b 451static __be32
1da177e4
LT		 452nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
453{
454 DECODE_HEAD;
455
456 close->cl_stateowner = NULL;
e31a1b66 457 READ_BUF(4);
1da177e4 458 READ32(close->cl_seqid);
e31a1b66 459 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 460
461 DECODE_TAIL;
462}
463
464
b37ad28b 465static __be32
1da177e4
LT		 466nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
467{
468 DECODE_HEAD;
469
470 READ_BUF(12);
471 READ64(commit->co_offset);
472 READ32(commit->co_count);
473
474 DECODE_TAIL;
475}
476
b37ad28b 477static __be32
1da177e4
LT		 478nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
479{
480 DECODE_HEAD;
481
482 READ_BUF(4);
483 READ32(create->cr_type);
484 switch (create->cr_type) {
485 case NF4LNK:
486 READ_BUF(4);
487 READ32(create->cr_linklen);
488 READ_BUF(create->cr_linklen);
489 SAVEMEM(create->cr_linkname, create->cr_linklen);
490 break;
491 case NF4BLK:
492 case NF4CHR:
493 READ_BUF(8);
494 READ32(create->cr_specdata1);
495 READ32(create->cr_specdata2);
496 break;
497 case NF4SOCK:
498 case NF4FIFO:
499 case NF4DIR:
500 default:
501 break;
502 }
503
504 READ_BUF(4);
505 READ32(create->cr_namelen);
506 READ_BUF(create->cr_namelen);
507 SAVEMEM(create->cr_name, create->cr_namelen);
508 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
509 return status;
510
c0d6fc8a
BH		 511 status = nfsd4_decode_fattr(argp, create->cr_bmval, nfsd_attrmask,
512 &create->cr_iattr, &create->cr_acl);
513 if (status)
1da177e4
LT		 514 goto out;
515
516 DECODE_TAIL;
517}
518
b37ad28b 519static inline __be32
1da177e4
LT		 520nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
521{
e31a1b66 522 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 523}
524
b37ad28b 525static inline __be32
1da177e4
LT		 526nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
527{
528 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
529}
530
b37ad28b 531static __be32
1da177e4
LT		 532nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
533{
534 DECODE_HEAD;
535
536 READ_BUF(4);
537 READ32(link->li_namelen);
538 READ_BUF(link->li_namelen);
539 SAVEMEM(link->li_name, link->li_namelen);
540 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
541 return status;
542
543 DECODE_TAIL;
544}
545
b37ad28b 546static __be32
1da177e4
LT		 547nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
548{
549 DECODE_HEAD;
550
3a65588a 551 lock->lk_replay_owner = NULL;
1da177e4
LT		 552 /*
553 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
554 */
555 READ_BUF(28);
556 READ32(lock->lk_type);
557 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
558 goto xdr_error;
559 READ32(lock->lk_reclaim);
560 READ64(lock->lk_offset);
561 READ64(lock->lk_length);
562 READ32(lock->lk_is_new);
563
564 if (lock->lk_is_new) {
e31a1b66 565 READ_BUF(4);
1da177e4 566 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 567 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
568 if (status)
569 return status;
570 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 571 READ32(lock->lk_new_lock_seqid);
572 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
573 READ32(lock->lk_new_owner.len);
574 READ_BUF(lock->lk_new_owner.len);
575 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
576 } else {
e31a1b66
BH		 577 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
578 if (status)
579 return status;
580 READ_BUF(4);
1da177e4
LT		 581 READ32(lock->lk_old_lock_seqid);
582 }
583
584 DECODE_TAIL;
585}
586
b37ad28b 587static __be32
1da177e4
LT		 588nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
589{
590 DECODE_HEAD;
591
592 READ_BUF(32);
593 READ32(lockt->lt_type);
594 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
595 goto xdr_error;
596 READ64(lockt->lt_offset);
597 READ64(lockt->lt_length);
598 COPYMEM(&lockt->lt_clientid, 8);
599 READ32(lockt->lt_owner.len);
600 READ_BUF(lockt->lt_owner.len);
601 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
602
60adfc50
AA		 603 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
604 return nfserr_inval;
1da177e4
LT		 605 DECODE_TAIL;
606}
607
b37ad28b 608static __be32
1da177e4
LT		 609nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
610{
611 DECODE_HEAD;
612
613 locku->lu_stateowner = NULL;
e31a1b66 614 READ_BUF(8);
1da177e4
LT		 615 READ32(locku->lu_type);
616 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
617 goto xdr_error;
618 READ32(locku->lu_seqid);
e31a1b66
BH		 619 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
620 if (status)
621 return status;
622 READ_BUF(16);
1da177e4
LT		 623 READ64(locku->lu_offset);
624 READ64(locku->lu_length);
625
626 DECODE_TAIL;
627}
628
b37ad28b 629static __be32
1da177e4
LT		 630nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
631{
632 DECODE_HEAD;
633
634 READ_BUF(4);
635 READ32(lookup->lo_len);
636 READ_BUF(lookup->lo_len);
637 SAVEMEM(lookup->lo_name, lookup->lo_len);
638 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
639 return status;
640
641 DECODE_TAIL;
642}
643
b37ad28b 644static __be32
1da177e4
LT		 645nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
646{
647 DECODE_HEAD;
648
649 memset(open->op_bmval, 0, sizeof(open->op_bmval));
650 open->op_iattr.ia_valid = 0;
651 open->op_stateowner = NULL;
652
653 /* seqid, share_access, share_deny, clientid, ownerlen */
654 READ_BUF(16 + sizeof(clientid_t));
655 READ32(open->op_seqid);
656 READ32(open->op_share_access);
657 READ32(open->op_share_deny);
658 COPYMEM(&open->op_clientid, sizeof(clientid_t));
659 READ32(open->op_owner.len);
660
661 /* owner, open_flag */
662 READ_BUF(open->op_owner.len + 4);
663 SAVEMEM(open->op_owner.data, open->op_owner.len);
664 READ32(open->op_create);
665 switch (open->op_create) {
666 case NFS4_OPEN_NOCREATE:
667 break;
668 case NFS4_OPEN_CREATE:
669 READ_BUF(4);
670 READ32(open->op_createmode);
671 switch (open->op_createmode) {
672 case NFS4_CREATE_UNCHECKED:
673 case NFS4_CREATE_GUARDED:
c0d6fc8a
BH		 674 status = nfsd4_decode_fattr(argp, open->op_bmval,
675 nfsd_attrmask, &open->op_iattr, &open->op_acl);
676 if (status)
1da177e4
LT		 677 goto out;
678 break;
679 case NFS4_CREATE_EXCLUSIVE:
680 READ_BUF(8);
681 COPYMEM(open->op_verf.data, 8);
682 break;
79fb54ab
BH		 683 case NFS4_CREATE_EXCLUSIVE4_1:
684 if (argp->minorversion < 1)
685 goto xdr_error;
686 READ_BUF(8);
687 COPYMEM(open->op_verf.data, 8);
688 status = nfsd4_decode_fattr(argp, open->op_bmval,
689 nfsd41_ex_attrmask, &open->op_iattr,
690 &open->op_acl);
691 if (status)
692 goto out;
693 break;
1da177e4
LT		 694 default:
695 goto xdr_error;
696 }
697 break;
698 default:
699 goto xdr_error;
700 }
701
702 /* open_claim */
703 READ_BUF(4);
704 READ32(open->op_claim_type);
705 switch (open->op_claim_type) {
706 case NFS4_OPEN_CLAIM_NULL:
707 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
708 READ_BUF(4);
709 READ32(open->op_fname.len);
710 READ_BUF(open->op_fname.len);
711 SAVEMEM(open->op_fname.data, open->op_fname.len);
712 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
713 return status;
714 break;
715 case NFS4_OPEN_CLAIM_PREVIOUS:
716 READ_BUF(4);
717 READ32(open->op_delegate_type);
718 break;
719 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 720 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
721 if (status)
722 return status;
723 READ_BUF(4);
1da177e4
LT		 724 READ32(open->op_fname.len);
725 READ_BUF(open->op_fname.len);
726 SAVEMEM(open->op_fname.data, open->op_fname.len);
727 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
728 return status;
729 break;
730 default:
731 goto xdr_error;
732 }
733
734 DECODE_TAIL;
735}
736
b37ad28b 737static __be32
1da177e4
LT		 738nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
739{
740 DECODE_HEAD;
741
742 open_conf->oc_stateowner = NULL;
e31a1b66
BH		 743 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
744 if (status)
745 return status;
746 READ_BUF(4);
1da177e4
LT		 747 READ32(open_conf->oc_seqid);
748
749 DECODE_TAIL;
750}
751
b37ad28b 752static __be32
1da177e4
LT		 753nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
754{
755 DECODE_HEAD;
756
757 open_down->od_stateowner = NULL;
e31a1b66
BH		 758 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
759 if (status)
760 return status;
761 READ_BUF(12);
1da177e4
LT		 762 READ32(open_down->od_seqid);
763 READ32(open_down->od_share_access);
764 READ32(open_down->od_share_deny);
765
766 DECODE_TAIL;
767}
768
b37ad28b 769static __be32
1da177e4
LT		 770nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
771{
772 DECODE_HEAD;
773
774 READ_BUF(4);
775 READ32(putfh->pf_fhlen);
776 if (putfh->pf_fhlen > NFS4_FHSIZE)
777 goto xdr_error;
778 READ_BUF(putfh->pf_fhlen);
779 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
780
781 DECODE_TAIL;
782}
783
b37ad28b 784static __be32
1da177e4
LT		 785nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
786{
787 DECODE_HEAD;
788
e31a1b66
BH		 789 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
790 if (status)
791 return status;
792 READ_BUF(12);
1da177e4
LT		 793 READ64(read->rd_offset);
794 READ32(read->rd_length);
795
796 DECODE_TAIL;
797}
798
b37ad28b 799static __be32
1da177e4
LT		 800nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
801{
802 DECODE_HEAD;
803
804 READ_BUF(24);
805 READ64(readdir->rd_cookie);
806 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
807 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
808 READ32(readdir->rd_maxcount);
809 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
810 goto out;
811
812 DECODE_TAIL;
813}
814
b37ad28b 815static __be32
1da177e4
LT		 816nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
817{
818 DECODE_HEAD;
819
820 READ_BUF(4);
821 READ32(remove->rm_namelen);
822 READ_BUF(remove->rm_namelen);
823 SAVEMEM(remove->rm_name, remove->rm_namelen);
824 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
825 return status;
826
827 DECODE_TAIL;
828}
829
b37ad28b 830static __be32
1da177e4
LT		 831nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
832{
833 DECODE_HEAD;
834
835 READ_BUF(4);
836 READ32(rename->rn_snamelen);
837 READ_BUF(rename->rn_snamelen + 4);
838 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
839 READ32(rename->rn_tnamelen);
840 READ_BUF(rename->rn_tnamelen);
841 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
842 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
843 return status;
844 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
845 return status;
846
847 DECODE_TAIL;
848}
849
b37ad28b 850static __be32
1da177e4
LT		 851nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
852{
853 DECODE_HEAD;
854
855 READ_BUF(sizeof(clientid_t));
856 COPYMEM(clientid, sizeof(clientid_t));
857
858 DECODE_TAIL;
859}
860
dcb488a3
AA		 861static __be32
862nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
863 struct nfsd4_secinfo *secinfo)
864{
865 DECODE_HEAD;
866
867 READ_BUF(4);
868 READ32(secinfo->si_namelen);
869 READ_BUF(secinfo->si_namelen);
870 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
871 status = check_filename(secinfo->si_name, secinfo->si_namelen,
872 nfserr_noent);
873 if (status)
874 return status;
875 DECODE_TAIL;
876}
877
b37ad28b 878static __be32
1da177e4
LT		 879nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
880{
e31a1b66 881 __be32 status;
1da177e4 882
e31a1b66
BH		 883 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
884 if (status)
885 return status;
c0d6fc8a 886 return nfsd4_decode_fattr(argp, setattr->sa_bmval, nfsd_attrmask,
e31a1b66 887 &setattr->sa_iattr, &setattr->sa_acl);
1da177e4
LT		 888}
889
b37ad28b 890static __be32
1da177e4
LT		 891nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
892{
893 DECODE_HEAD;
894
895 READ_BUF(12);
896 COPYMEM(setclientid->se_verf.data, 8);
897 READ32(setclientid->se_namelen);
898
899 READ_BUF(setclientid->se_namelen + 8);
900 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
901 READ32(setclientid->se_callback_prog);
902 READ32(setclientid->se_callback_netid_len);
903
904 READ_BUF(setclientid->se_callback_netid_len + 4);
905 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
906 READ32(setclientid->se_callback_addr_len);
907
908 READ_BUF(setclientid->se_callback_addr_len + 4);
909 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
910 READ32(setclientid->se_callback_ident);
911
912 DECODE_TAIL;
913}
914
b37ad28b 915static __be32
1da177e4
LT		 916nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
917{
918 DECODE_HEAD;
919
920 READ_BUF(8 + sizeof(nfs4_verifier));
921 COPYMEM(&scd_c->sc_clientid, 8);
922 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
923
924 DECODE_TAIL;
925}
926
927/* Also used for NVERIFY */
b37ad28b 928static __be32
1da177e4
LT		 929nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
930{
931#if 0
932 struct nfsd4_compoundargs save = {
933 .p = argp->p,
934 .end = argp->end,
935 .rqstp = argp->rqstp,
936 };
937 u32 ve_bmval[2];
938 struct iattr ve_iattr; /* request */
939 struct nfs4_acl *ve_acl; /* request */
940#endif
941 DECODE_HEAD;
942
943 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
944 goto out;
945
946 /* For convenience's sake, we compare raw xdr'd attributes in
947 * nfsd4_proc_verify; however we still decode here just to return
948 * correct error in case of bad xdr. */
949#if 0
950 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
951 if (status == nfserr_inval) {
952 status = nfserrno(status);
953 goto out;
954 }
955#endif
956 READ_BUF(4);
957 READ32(verify->ve_attrlen);
958 READ_BUF(verify->ve_attrlen);
959 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
960
961 DECODE_TAIL;
962}
963
b37ad28b 964static __be32
1da177e4
LT		 965nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
966{
967 int avail;
968 int v;
969 int len;
970 DECODE_HEAD;
971
e31a1b66
BH		 972 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
973 if (status)
974 return status;
975 READ_BUF(16);
1da177e4
LT		 976 READ64(write->wr_offset);
977 READ32(write->wr_stable_how);
978 if (write->wr_stable_how > 2)
979 goto xdr_error;
980 READ32(write->wr_buflen);
981
982 /* Sorry .. no magic macros for this.. *
983 * READ_BUF(write->wr_buflen);
984 * SAVEMEM(write->wr_buf, write->wr_buflen);
985 */
986 avail = (char*)argp->end - (char*)argp->p;
987 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 988 dprintk("NFSD: xdr error (%s:%d)\n",
989 __FILE__, __LINE__);
1da177e4
LT		 990 goto xdr_error;
991 }
3cc03b16
N		 992 argp->rqstp->rq_vec[0].iov_base = p;
993 argp->rqstp->rq_vec[0].iov_len = avail;
1da177e4
LT		 994 v = 0;
995 len = write->wr_buflen;
3cc03b16
N		 996 while (len > argp->rqstp->rq_vec[v].iov_len) {
997 len -= argp->rqstp->rq_vec[v].iov_len;
1da177e4 998 v++;
3cc03b16 999 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1da177e4
LT		 1000 argp->pagelist++;
1001 if (argp->pagelen >= PAGE_SIZE) {
3cc03b16 1002 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1da177e4
LT		 1003 argp->pagelen -= PAGE_SIZE;
1004 } else {
3cc03b16 1005 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1da177e4
LT		 1006 argp->pagelen -= len;
1007 }
1008 }
2ebbc012
AV		 1009 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
1010 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
3cc03b16 1011 argp->rqstp->rq_vec[v].iov_len = len;
1da177e4
LT		 1012 write->wr_vlen = v+1;
1013
1014 DECODE_TAIL;
1015}
1016
b37ad28b 1017static __be32
1da177e4
LT		 1018nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1019{
1020 DECODE_HEAD;
1021
1022 READ_BUF(12);
1023 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1024 READ32(rlockowner->rl_owner.len);
1025 READ_BUF(rlockowner->rl_owner.len);
1026 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1027
60adfc50
AA		 1028 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1029 return nfserr_inval;
1da177e4
LT		 1030 DECODE_TAIL;
1031}
1032
2db134eb
AA		 1033static __be32
1034nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1035 struct nfsd4_exchange_id *exid)
2db134eb 1036{
0733d213
AA		 1037 int dummy;
1038 DECODE_HEAD;
1039
1040 READ_BUF(NFS4_VERIFIER_SIZE);
1041 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1042
1043 READ_BUF(4);
1044 READ32(exid->clname.len);
1045
1046 READ_BUF(exid->clname.len);
1047 SAVEMEM(exid->clname.data, exid->clname.len);
1048
1049 READ_BUF(4);
1050 READ32(exid->flags);
1051
1052 /* Ignore state_protect4_a */
1053 READ_BUF(4);
1054 READ32(exid->spa_how);
1055 switch (exid->spa_how) {
1056 case SP4_NONE:
1057 break;
1058 case SP4_MACH_CRED:
1059 /* spo_must_enforce */
1060 READ_BUF(4);
1061 READ32(dummy);
1062 READ_BUF(dummy * 4);
1063 p += dummy;
1064
1065 /* spo_must_allow */
1066 READ_BUF(4);
1067 READ32(dummy);
1068 READ_BUF(dummy * 4);
1069 p += dummy;
1070 break;
1071 case SP4_SSV:
1072 /* ssp_ops */
1073 READ_BUF(4);
1074 READ32(dummy);
1075 READ_BUF(dummy * 4);
1076 p += dummy;
1077
1078 READ_BUF(4);
1079 READ32(dummy);
1080 READ_BUF(dummy * 4);
1081 p += dummy;
1082
1083 /* ssp_hash_algs<> */
1084 READ_BUF(4);
1085 READ32(dummy);
1086 READ_BUF(dummy);
1087 p += XDR_QUADLEN(dummy);
1088
1089 /* ssp_encr_algs<> */
1090 READ_BUF(4);
1091 READ32(dummy);
1092 READ_BUF(dummy);
1093 p += XDR_QUADLEN(dummy);
1094
1095 /* ssp_window and ssp_num_gss_handles */
1096 READ_BUF(8);
1097 READ32(dummy);
1098 READ32(dummy);
1099 break;
1100 default:
1101 goto xdr_error;
1102 }
1103
1104 /* Ignore Implementation ID */
1105 READ_BUF(4); /* nfs_impl_id4 array length */
1106 READ32(dummy);
1107
1108 if (dummy > 1)
1109 goto xdr_error;
1110
1111 if (dummy == 1) {
1112 /* nii_domain */
1113 READ_BUF(4);
1114 READ32(dummy);
1115 READ_BUF(dummy);
1116 p += XDR_QUADLEN(dummy);
1117
1118 /* nii_name */
1119 READ_BUF(4);
1120 READ32(dummy);
1121 READ_BUF(dummy);
1122 p += XDR_QUADLEN(dummy);
1123
1124 /* nii_date */
1125 READ_BUF(12);
1126 p += 3;
1127 }
1128 DECODE_TAIL;
2db134eb
AA		 1129}
1130
1131static __be32
1132nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1133 struct nfsd4_create_session *sess)
1134{
ec6b5d7b
AA		 1135 DECODE_HEAD;
1136
1137 u32 dummy;
1138 char *machine_name;
1139 int i;
1140 int nr_secflavs;
1141
1142 READ_BUF(16);
1143 COPYMEM(&sess->clientid, 8);
1144 READ32(sess->seqid);
1145 READ32(sess->flags);
1146
1147 /* Fore channel attrs */
1148 READ_BUF(28);
1149 READ32(dummy); /* headerpadsz is always 0 */
1150 READ32(sess->fore_channel.maxreq_sz);
1151 READ32(sess->fore_channel.maxresp_sz);
1152 READ32(sess->fore_channel.maxresp_cached);
1153 READ32(sess->fore_channel.maxops);
1154 READ32(sess->fore_channel.maxreqs);
1155 READ32(sess->fore_channel.nr_rdma_attrs);
1156 if (sess->fore_channel.nr_rdma_attrs == 1) {
1157 READ_BUF(4);
1158 READ32(sess->fore_channel.rdma_attrs);
1159 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1160 dprintk("Too many fore channel attr bitmaps!\n");
1161 goto xdr_error;
1162 }
1163
1164 /* Back channel attrs */
1165 READ_BUF(28);
1166 READ32(dummy); /* headerpadsz is always 0 */
1167 READ32(sess->back_channel.maxreq_sz);
1168 READ32(sess->back_channel.maxresp_sz);
1169 READ32(sess->back_channel.maxresp_cached);
1170 READ32(sess->back_channel.maxops);
1171 READ32(sess->back_channel.maxreqs);
1172 READ32(sess->back_channel.nr_rdma_attrs);
1173 if (sess->back_channel.nr_rdma_attrs == 1) {
1174 READ_BUF(4);
1175 READ32(sess->back_channel.rdma_attrs);
1176 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1177 dprintk("Too many back channel attr bitmaps!\n");
1178 goto xdr_error;
1179 }
1180
1181 READ_BUF(8);
1182 READ32(sess->callback_prog);
1183
1184 /* callback_sec_params4 */
1185 READ32(nr_secflavs);
1186 for (i = 0; i < nr_secflavs; ++i) {
1187 READ_BUF(4);
1188 READ32(dummy);
1189 switch (dummy) {
1190 case RPC_AUTH_NULL:
1191 /* Nothing to read */
1192 break;
1193 case RPC_AUTH_UNIX:
1194 READ_BUF(8);
1195 /* stamp */
1196 READ32(dummy);
1197
1198 /* machine name */
1199 READ32(dummy);
1200 READ_BUF(dummy);
1201 SAVEMEM(machine_name, dummy);
1202
1203 /* uid, gid */
1204 READ_BUF(8);
1205 READ32(sess->uid);
1206 READ32(sess->gid);
1207
1208 /* more gids */
1209 READ_BUF(4);
1210 READ32(dummy);
1211 READ_BUF(dummy * 4);
1212 for (i = 0; i < dummy; ++i)
1213 READ32(dummy);
1214 break;
1215 case RPC_AUTH_GSS:
1216 dprintk("RPC_AUTH_GSS callback secflavor "
1217 "not supported!\n");
1218 READ_BUF(8);
1219 /* gcbp_service */
1220 READ32(dummy);
1221 /* gcbp_handle_from_server */
1222 READ32(dummy);
1223 READ_BUF(dummy);
1224 p += XDR_QUADLEN(dummy);
1225 /* gcbp_handle_from_client */
1226 READ_BUF(4);
1227 READ32(dummy);
1228 READ_BUF(dummy);
1229 p += XDR_QUADLEN(dummy);
1230 break;
1231 default:
1232 dprintk("Illegal callback secflavor\n");
1233 return nfserr_inval;
1234 }
1235 }
1236 DECODE_TAIL;
2db134eb
AA		 1237}
1238
1239static __be32
1240nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1241 struct nfsd4_destroy_session *destroy_session)
1242{
e10e0cfc
BH		 1243 DECODE_HEAD;
1244 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1245 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1246
1247 DECODE_TAIL;
2db134eb
AA		 1248}
1249
1250static __be32
1251nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1252 struct nfsd4_sequence *seq)
1253{
b85d4c01
BH		 1254 DECODE_HEAD;
1255
1256 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1257 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1258 READ32(seq->seqid);
1259 READ32(seq->slotid);
1260 READ32(seq->maxslots);
1261 READ32(seq->cachethis);
1262
1263 DECODE_TAIL;
2db134eb
AA		 1264}
1265
347e0ad9
BH		 1266static __be32
1267nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1268{
1269 return nfs_ok;
1270}
1271
3c375c6f
BH		 1272static __be32
1273nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1274{
1e685ec2 1275 return nfserr_notsupp;
3c375c6f
BH		 1276}
1277
347e0ad9
BH		 1278typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1279
1280static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1281 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1282 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1283 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1284 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1285 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1286 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1287 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1288 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1289 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1290 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1291 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1292 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1293 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1294 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1295 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1296 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1297 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1298 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1299 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1300 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
a1c8c4d1 1301 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
ad1060c8
BF		 1302 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1303 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1304 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1305 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1306 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1307 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1308 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1309 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1310 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1311 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1312 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1313 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1314 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1315 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1316 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1317 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
347e0ad9
BH		 1318};
1319
2db134eb 1320static nfsd4_dec nfsd41_dec_ops[] = {
9064caae
RD		 1321 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1322 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1323 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1324 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1325 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1326 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1327 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1328 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1329 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1330 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1331 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1332 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1333 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1334 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1335 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1336 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1337 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1338 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1339 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1340 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1341 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1342 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1343 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1344 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1345 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1346 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1347 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1348 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1349 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1350 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1351 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1352 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1353 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1354 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1355 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1356 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1357 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
2db134eb
AA		 1358
1359 /* new operations for NFSv4.1 */
9064caae
RD		 1360 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1361 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_notsupp,
1362 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1363 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1364 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1365 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1366 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1367 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1368 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1369 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1370 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1371 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1372 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1373 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1374 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1375 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1376 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1377 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1378 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_notsupp,
2db134eb
AA		 1379};
1380
f2feb96b
BH		 1381struct nfsd4_minorversion_ops {
1382 nfsd4_dec *decoders;
1383 int nops;
1384};
1385
1386static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
ad1060c8 1387 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
2db134eb 1388 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
f2feb96b
BH		 1389};
1390
b37ad28b 1391static __be32
1da177e4
LT		 1392nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1393{
1394 DECODE_HEAD;
1395 struct nfsd4_op *op;
f2feb96b 1396 struct nfsd4_minorversion_ops *ops;
1da177e4
LT		 1397 int i;
1398
1399 /*
1400 * XXX: According to spec, we should check the tag
1401 * for UTF-8 compliance. I'm postponing this for
1402 * now because it seems that some clients do use
1403 * binary tags.
1404 */
1405 READ_BUF(4);
1406 READ32(argp->taglen);
1407 READ_BUF(argp->taglen + 8);
1408 SAVEMEM(argp->tag, argp->taglen);
1409 READ32(argp->minorversion);
1410 READ32(argp->opcnt);
1411
1412 if (argp->taglen > NFSD4_MAX_TAGLEN)
1413 goto xdr_error;
1414 if (argp->opcnt > 100)
1415 goto xdr_error;
1416
e8c96f8c 1417 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1418 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1419 if (!argp->ops) {
1420 argp->ops = argp->iops;
817cb9d4 1421 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1422 goto xdr_error;
1423 }
1424 }
1425
f2feb96b 1426 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
30cff1ff
BH		 1427 argp->opcnt = 0;
1428
f2feb96b 1429 ops = &nfsd4_minorversion[argp->minorversion];
1da177e4
LT		 1430 for (i = 0; i < argp->opcnt; i++) {
1431 op = &argp->ops[i];
1432 op->replay = NULL;
1433
1434 /*
1435 * We can't use READ_BUF() here because we need to handle
1436 * a missing opcode as an OP_WRITE + 1. So we need to check
1437 * to see if we're truly at the end of our buffer or if there
1438 * is another page we need to flip to.
1439 */
1440
1441 if (argp->p == argp->end) {
1442 if (argp->pagelen < 4) {
1443 /* There isn't an opcode still on the wire */
1444 op->opnum = OP_WRITE + 1;
1445 op->status = nfserr_bad_xdr;
1446 argp->opcnt = i+1;
1447 break;
1448 }
1449
1450 /*
1451 * False alarm. We just hit a page boundary, but there
1452 * is still data available. Move pointer across page
1453 * boundary. *snip from READ_BUF*
1454 */
1455 argp->p = page_address(argp->pagelist[0]);
1456 argp->pagelist++;
1457 if (argp->pagelen < PAGE_SIZE) {
1458 argp->end = p + (argp->pagelen>>2);
1459 argp->pagelen = 0;
1460 } else {
1461 argp->end = p + (PAGE_SIZE>>2);
1462 argp->pagelen -= PAGE_SIZE;
1463 }
1464 }
1465 op->opnum = ntohl(*argp->p++);
1466
f2feb96b
BH		 1467 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1468 op->status = ops->decoders[op->opnum](argp, &op->u);
347e0ad9 1469 else {
1da177e4
LT		 1470 op->opnum = OP_ILLEGAL;
1471 op->status = nfserr_op_illegal;
1da177e4
LT		 1472 }
1473
1474 if (op->status) {
1475 argp->opcnt = i+1;
1476 break;
1477 }
1478 }
1479
1480 DECODE_TAIL;
1481}
1da177e4 1482
1da177e4
LT		 1483#define WRITE32(n) *p++ = htonl(n)
1484#define WRITE64(n) do { \
1485 *p++ = htonl((u32)((n) >> 32)); \
1486 *p++ = htonl((u32)(n)); \
1487} while (0)
5108b276 1488#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1489 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1490 memcpy(p, ptr, nbytes); \
1491 p += XDR_QUADLEN(nbytes); \
5108b276 1492}} while (0)
c654b8a9
BF		 1493
1494static void write32(__be32 **p, u32 n)
1495{
1496 *(*p)++ = n;
1497}
1498
1499static void write64(__be32 **p, u64 n)
1500{
1501 write32(p, (u32)(n >> 32));
1502 write32(p, (u32)n);
1503}
1504
1505static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1506{
1507 if (IS_I_VERSION(inode)) {
1508 write64(p, inode->i_version);
1509 } else {
1510 write32(p, stat->ctime.tv_sec);
1511 write32(p, stat->ctime.tv_nsec);
1512 }
1513}
1514
1515static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1516{
1517 write32(p, c->atomic);
1518 if (c->change_supported) {
1519 write64(p, c->before_change);
1520 write64(p, c->after_change);
1521 } else {
1522 write32(p, c->before_ctime_sec);
1523 write32(p, c->before_ctime_nsec);
1524 write32(p, c->after_ctime_sec);
1525 write32(p, c->after_ctime_nsec);
1526 }
1527}
1da177e4
LT		 1528
1529#define RESERVE_SPACE(nbytes) do { \
1530 p = resp->p; \
1531 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1532} while (0)
1533#define ADJUST_ARGS() resp->p = p
1534
1535/*
1536 * Header routine to setup seqid operation replay cache
1537 */
1538#define ENCODE_SEQID_OP_HEAD \
2ebbc012 1539 __be32 *save; \
1da177e4
LT		 1540 \
1541 save = resp->p;
1542
1543/*
7fb64cee
N		 1544 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1545 * is where sequence id's are incremented, and the replay cache is filled.
1546 * Note that we increment sequence id's here, at the last moment, so we're sure
1547 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1548 */
1549
1550#define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1551 if (seqid_mutating_err(nfserr) && stateowner) { \
bd9aac52 1552 stateowner->so_seqid++; \
1da177e4
LT		 1553 stateowner->so_replay.rp_status = nfserr; \
1554 stateowner->so_replay.rp_buflen = \
1555 (((char *)(resp)->p - (char *)save)); \
1556 memcpy(stateowner->so_replay.rp_buf, save, \
1557 stateowner->so_replay.rp_buflen); \
1558 } } while (0);
1559
81c3f413
BF		 1560/* Encode as an array of strings the string given with components
1561 * seperated @sep.
1562 */
b37ad28b 1563static __be32 nfsd4_encode_components(char sep, char *components,
2ebbc012 1564 __be32 **pp, int *buflen)
81c3f413 1565{
2ebbc012
AV		 1566 __be32 *p = *pp;
1567 __be32 *countp = p;
81c3f413
BF		 1568 int strlen, count=0;
1569 char *str, *end;
1570
1571 dprintk("nfsd4_encode_components(%s)\n", components);
1572 if ((*buflen -= 4) < 0)
1573 return nfserr_resource;
1574 WRITE32(0); /* We will fill this in with @count later */
1575 end = str = components;
1576 while (*end) {
1577 for (; *end && (*end != sep); end++)
1578 ; /* Point to end of component */
1579 strlen = end - str;
1580 if (strlen) {
1581 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1582 return nfserr_resource;
1583 WRITE32(strlen);
1584 WRITEMEM(str, strlen);
1585 count++;
1586 }
1587 else
1588 end++;
1589 str = end;
1590 }
1591 *pp = p;
1592 p = countp;
1593 WRITE32(count);
1594 return 0;
1595}
1596
1597/*
1598 * encode a location element of a fs_locations structure
1599 */
b37ad28b 1600static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1601 __be32 **pp, int *buflen)
81c3f413 1602{
b37ad28b 1603 __be32 status;
2ebbc012 1604 __be32 *p = *pp;
81c3f413
BF		 1605
1606 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1607 if (status)
1608 return status;
1609 status = nfsd4_encode_components('/', location->path, &p, buflen);
1610 if (status)
1611 return status;
1612 *pp = p;
1613 return 0;
1614}
1615
1616/*
1617 * Return the path to an export point in the pseudo filesystem namespace
1618 * Returned string is safe to use as long as the caller holds a reference
1619 * to @exp.
1620 */
b37ad28b 1621static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
81c3f413
BF		 1622{
1623 struct svc_fh tmp_fh;
1624 char *path, *rootpath;
81c3f413
BF		 1625
1626 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb 1627 *stat = exp_pseudoroot(rqstp, &tmp_fh);
cc45f017
AV		 1628 if (*stat)
1629 return NULL;
54775491 1630 rootpath = tmp_fh.fh_export->ex_pathname;
81c3f413 1631
54775491 1632 path = exp->ex_pathname;
81c3f413
BF		 1633
1634 if (strncmp(path, rootpath, strlen(rootpath))) {
817cb9d4 1635 dprintk("nfsd: fs_locations failed;"
81c3f413 1636 "%s is not contained in %s\n", path, rootpath);
cc45f017
AV		 1637 *stat = nfserr_notsupp;
1638 return NULL;
81c3f413
BF		 1639 }
1640
1641 return path + strlen(rootpath);
1642}
1643
1644/*
1645 * encode a fs_locations structure
1646 */
b37ad28b 1647static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1648 struct svc_export *exp,
2ebbc012 1649 __be32 **pp, int *buflen)
81c3f413 1650{
b37ad28b 1651 __be32 status;
cc45f017 1652 int i;
2ebbc012 1653 __be32 *p = *pp;
81c3f413 1654 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
cc45f017 1655 char *root = nfsd4_path(rqstp, exp, &status);
81c3f413 1656
cc45f017
AV		 1657 if (status)
1658 return status;
81c3f413
BF		 1659 status = nfsd4_encode_components('/', root, &p, buflen);
1660 if (status)
1661 return status;
1662 if ((*buflen -= 4) < 0)
1663 return nfserr_resource;
1664 WRITE32(fslocs->locations_count);
1665 for (i=0; i<fslocs->locations_count; i++) {
1666 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1667 &p, buflen);
1668 if (status)
1669 return status;
1670 }
1671 *pp = p;
1672 return 0;
1673}
1da177e4
LT		 1674
1675static u32 nfs4_ftypes[16] = {
1676 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1677 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1678 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1679 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1680};
1681
b37ad28b 1682static __be32
1da177e4 1683nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1684 __be32 **p, int *buflen)
1da177e4
LT		 1685{
1686 int status;
1687
1688 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1689 return nfserr_resource;
1690 if (whotype != NFS4_ACL_WHO_NAMED)
1691 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1692 else if (group)
1693 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1694 else
1695 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1696 if (status < 0)
1697 return nfserrno(status);
1698 *p = xdr_encode_opaque(*p, NULL, status);
1699 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1700 BUG_ON(*buflen < 0);
1701 return 0;
1702}
1703
b37ad28b 1704static inline __be32
2ebbc012 1705nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1da177e4
LT		 1706{
1707 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1708}
1709
b37ad28b 1710static inline __be32
2ebbc012 1711nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1da177e4
LT		 1712{
1713 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1714}
1715
b37ad28b 1716static inline __be32
1da177e4 1717nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1718 __be32 **p, int *buflen)
1da177e4
LT		 1719{
1720 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1721}
1722
42ca0993
BF		 1723#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1724 FATTR4_WORD0_RDATTR_ERROR)
1725#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1726
b37ad28b 1727static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1728{
1729 /* As per referral draft: */
1730 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1731 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1732 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1733 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1734 *rdattr_err = NFSERR_MOVED;
1735 else
1736 return nfserr_moved;
1737 }
1738 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1739 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1740 return 0;
1741}
1da177e4
LT		 1742
1743/*
1744 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1745 * ourselves.
1746 *
1747 * @countp is the buffer size in _words_; upon successful return this becomes
1748 * replaced with the number of words written.
1749 */
b37ad28b 1750__be32
1da177e4 1751nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2ebbc012 1752 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
406a7ea9 1753 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 1754{
1755 u32 bmval0 = bmval[0];
1756 u32 bmval1 = bmval[1];
7e705706 1757 u32 bmval2 = bmval[2];
1da177e4
LT		 1758 struct kstat stat;
1759 struct svc_fh tempfh;
1760 struct kstatfs statfs;
1761 int buflen = *countp << 2;
2ebbc012 1762 __be32 *attrlenp;
1da177e4
LT		 1763 u32 dummy;
1764 u64 dummy64;
42ca0993 1765 u32 rdattr_err = 0;
2ebbc012 1766 __be32 *p = buffer;
b37ad28b 1767 __be32 status;
b8dd7b9a 1768 int err;
1da177e4
LT		 1769 int aclsupport = 0;
1770 struct nfs4_acl *acl = NULL;
7e705706
AA		 1771 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1772 u32 minorversion = resp->cstate.minorversion;
1da177e4
LT		 1773
1774 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 1775 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1776 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1777 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 1778
42ca0993 1779 if (exp->ex_fslocs.migrated) {
7e705706 1780 BUG_ON(bmval[2]);
42ca0993
BF		 1781 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1782 if (status)
1783 goto out;
1784 }
1785
54775491 1786 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
b8dd7b9a 1787 if (err)
1da177e4 1788 goto out_nfserr;
a16e92ed
BF		 1789 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1790 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 1791 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1792 FATTR4_WORD1_SPACE_TOTAL))) {
b8dd7b9a
AV		 1793 err = vfs_statfs(dentry, &statfs);
1794 if (err)
1da177e4
LT		 1795 goto out_nfserr;
1796 }
1797 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1798 fh_init(&tempfh, NFS4_FHSIZE);
1799 status = fh_compose(&tempfh, exp, dentry, NULL);
1800 if (status)
1801 goto out;
1802 fhp = &tempfh;
1803 }
1804 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1805 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 1806 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1807 aclsupport = (err == 0);
1da177e4 1808 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 1809 if (err == -EOPNOTSUPP)
1da177e4 1810 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 1811 else if (err == -EINVAL) {
1da177e4
LT		 1812 status = nfserr_attrnotsupp;
1813 goto out;
b8dd7b9a 1814 } else if (err != 0)
1da177e4
LT		 1815 goto out_nfserr;
1816 }
1817 }
81c3f413
BF		 1818 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1819 if (exp->ex_fslocs.locations == NULL) {
1820 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1821 }
1822 }
1da177e4
LT		 1823 if ((buflen -= 16) < 0)
1824 goto out_resource;
1825
7e705706
AA		 1826 if (unlikely(bmval2)) {
1827 WRITE32(3);
1828 WRITE32(bmval0);
1829 WRITE32(bmval1);
1830 WRITE32(bmval2);
1831 } else if (likely(bmval1)) {
1832 WRITE32(2);
1833 WRITE32(bmval0);
1834 WRITE32(bmval1);
1835 } else {
1836 WRITE32(1);
1837 WRITE32(bmval0);
1838 }
1da177e4
LT		 1839 attrlenp = p++; /* to be backfilled later */
1840
1841 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 1842 u32 word0 = nfsd_suppattrs0(minorversion);
1843 u32 word1 = nfsd_suppattrs1(minorversion);
1844 u32 word2 = nfsd_suppattrs2(minorversion);
1845
1da177e4
LT		 1846 if ((buflen -= 12) < 0)
1847 goto out_resource;
42ca0993
BF		 1848 if (!aclsupport)
1849 word0 &= ~FATTR4_WORD0_ACL;
1850 if (!exp->ex_fslocs.locations)
1851 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
7e705706
AA		 1852 if (!word2) {
1853 WRITE32(2);
1854 WRITE32(word0);
1855 WRITE32(word1);
1856 } else {
1857 WRITE32(3);
1858 WRITE32(word0);
1859 WRITE32(word1);
1860 WRITE32(word2);
1861 }
1da177e4
LT		 1862 }
1863 if (bmval0 & FATTR4_WORD0_TYPE) {
1864 if ((buflen -= 4) < 0)
1865 goto out_resource;
1866 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1867 if (dummy == NF4BAD)
1868 goto out_serverfault;
1869 WRITE32(dummy);
1870 }
1871 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1872 if ((buflen -= 4) < 0)
1873 goto out_resource;
49640001 1874 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 1875 WRITE32(NFS4_FH_PERSISTENT);
49640001 1876 else
e34ac862 1877 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 1878 }
1879 if (bmval0 & FATTR4_WORD0_CHANGE) {
1da177e4
LT		 1880 if ((buflen -= 8) < 0)
1881 goto out_resource;
c654b8a9 1882 write_change(&p, &stat, dentry->d_inode);
1da177e4
LT		 1883 }
1884 if (bmval0 & FATTR4_WORD0_SIZE) {
1885 if ((buflen -= 8) < 0)
1886 goto out_resource;
1887 WRITE64(stat.size);
1888 }
1889 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1890 if ((buflen -= 4) < 0)
1891 goto out_resource;
1892 WRITE32(1);
1893 }
1894 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1895 if ((buflen -= 4) < 0)
1896 goto out_resource;
1897 WRITE32(1);
1898 }
1899 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1900 if ((buflen -= 4) < 0)
1901 goto out_resource;
1902 WRITE32(0);
1903 }
1904 if (bmval0 & FATTR4_WORD0_FSID) {
1905 if ((buflen -= 16) < 0)
1906 goto out_resource;
42ca0993
BF		 1907 if (exp->ex_fslocs.migrated) {
1908 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1909 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 1910 } else switch(fsid_source(fhp)) {
1911 case FSIDSOURCE_FSID:
1da177e4
LT		 1912 WRITE64((u64)exp->ex_fsid);
1913 WRITE64((u64)0);
af6a4e28
N		 1914 break;
1915 case FSIDSOURCE_DEV:
1da177e4
LT		 1916 WRITE32(0);
1917 WRITE32(MAJOR(stat.dev));
1918 WRITE32(0);
1919 WRITE32(MINOR(stat.dev));
af6a4e28
N		 1920 break;
1921 case FSIDSOURCE_UUID:
1922 WRITEMEM(exp->ex_uuid, 16);
1923 break;
1da177e4
LT		 1924 }
1925 }
1926 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1927 if ((buflen -= 4) < 0)
1928 goto out_resource;
1929 WRITE32(0);
1930 }
1931 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1932 if ((buflen -= 4) < 0)
1933 goto out_resource;
1934 WRITE32(NFSD_LEASE_TIME);
1935 }
1936 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1937 if ((buflen -= 4) < 0)
1938 goto out_resource;
42ca0993 1939 WRITE32(rdattr_err);
1da177e4
LT		 1940 }
1941 if (bmval0 & FATTR4_WORD0_ACL) {
1942 struct nfs4_ace *ace;
1da177e4
LT		 1943
1944 if (acl == NULL) {
1945 if ((buflen -= 4) < 0)
1946 goto out_resource;
1947
1948 WRITE32(0);
1949 goto out_acl;
1950 }
1951 if ((buflen -= 4) < 0)
1952 goto out_resource;
1953 WRITE32(acl->naces);
1954
28e05dd8 1955 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 1956 if ((buflen -= 4*3) < 0)
1957 goto out_resource;
1958 WRITE32(ace->type);
1959 WRITE32(ace->flag);
1960 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1961 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1962 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1963 &p, &buflen);
1964 if (status == nfserr_resource)
1965 goto out_resource;
1966 if (status)
1967 goto out;
1968 }
1969 }
1970out_acl:
1971 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1972 if ((buflen -= 4) < 0)
1973 goto out_resource;
1974 WRITE32(aclsupport ?
1975 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1976 }
1977 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1978 if ((buflen -= 4) < 0)
1979 goto out_resource;
1980 WRITE32(1);
1981 }
1982 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1983 if ((buflen -= 4) < 0)
1984 goto out_resource;
1985 WRITE32(1);
1986 }
1987 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1988 if ((buflen -= 4) < 0)
1989 goto out_resource;
1990 WRITE32(1);
1991 }
1992 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1993 if ((buflen -= 4) < 0)
1994 goto out_resource;
1995 WRITE32(1);
1996 }
1997 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1998 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1999 if (buflen < 0)
2000 goto out_resource;
2001 WRITE32(fhp->fh_handle.fh_size);
2002 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2003 }
2004 if (bmval0 & FATTR4_WORD0_FILEID) {
2005 if ((buflen -= 8) < 0)
2006 goto out_resource;
40ee5dc6 2007 WRITE64(stat.ino);
1da177e4
LT		 2008 }
2009 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2010 if ((buflen -= 8) < 0)
2011 goto out_resource;
2012 WRITE64((u64) statfs.f_ffree);
2013 }
2014 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2015 if ((buflen -= 8) < 0)
2016 goto out_resource;
2017 WRITE64((u64) statfs.f_ffree);
2018 }
2019 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2020 if ((buflen -= 8) < 0)
2021 goto out_resource;
2022 WRITE64((u64) statfs.f_files);
2023 }
81c3f413
BF		 2024 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2025 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2026 if (status == nfserr_resource)
2027 goto out_resource;
2028 if (status)
2029 goto out;
2030 }
1da177e4
LT		 2031 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2032 if ((buflen -= 4) < 0)
2033 goto out_resource;
2034 WRITE32(1);
2035 }
2036 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2037 if ((buflen -= 8) < 0)
2038 goto out_resource;
2039 WRITE64(~(u64)0);
2040 }
2041 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2042 if ((buflen -= 4) < 0)
2043 goto out_resource;
2044 WRITE32(255);
2045 }
2046 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2047 if ((buflen -= 4) < 0)
2048 goto out_resource;
a16e92ed 2049 WRITE32(statfs.f_namelen);
1da177e4
LT		 2050 }
2051 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2052 if ((buflen -= 8) < 0)
2053 goto out_resource;
7adae489 2054 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2055 }
2056 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2057 if ((buflen -= 8) < 0)
2058 goto out_resource;
7adae489 2059 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2060 }
2061 if (bmval1 & FATTR4_WORD1_MODE) {
2062 if ((buflen -= 4) < 0)
2063 goto out_resource;
2064 WRITE32(stat.mode & S_IALLUGO);
2065 }
2066 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2067 if ((buflen -= 4) < 0)
2068 goto out_resource;
2069 WRITE32(1);
2070 }
2071 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2072 if ((buflen -= 4) < 0)
2073 goto out_resource;
2074 WRITE32(stat.nlink);
2075 }
2076 if (bmval1 & FATTR4_WORD1_OWNER) {
2077 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2078 if (status == nfserr_resource)
2079 goto out_resource;
2080 if (status)
2081 goto out;
2082 }
2083 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2084 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2085 if (status == nfserr_resource)
2086 goto out_resource;
2087 if (status)
2088 goto out;
2089 }
2090 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2091 if ((buflen -= 8) < 0)
2092 goto out_resource;
2093 WRITE32((u32) MAJOR(stat.rdev));
2094 WRITE32((u32) MINOR(stat.rdev));
2095 }
2096 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2097 if ((buflen -= 8) < 0)
2098 goto out_resource;
2099 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2100 WRITE64(dummy64);
2101 }
2102 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2103 if ((buflen -= 8) < 0)
2104 goto out_resource;
2105 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2106 WRITE64(dummy64);
2107 }
2108 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2109 if ((buflen -= 8) < 0)
2110 goto out_resource;
2111 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2112 WRITE64(dummy64);
2113 }
2114 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2115 if ((buflen -= 8) < 0)
2116 goto out_resource;
2117 dummy64 = (u64)stat.blocks << 9;
2118 WRITE64(dummy64);
2119 }
2120 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2121 if ((buflen -= 12) < 0)
2122 goto out_resource;
2123 WRITE32(0);
2124 WRITE32(stat.atime.tv_sec);
2125 WRITE32(stat.atime.tv_nsec);
2126 }
2127 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2128 if ((buflen -= 12) < 0)
2129 goto out_resource;
2130 WRITE32(0);
2131 WRITE32(1);
2132 WRITE32(0);
2133 }
2134 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2135 if ((buflen -= 12) < 0)
2136 goto out_resource;
2137 WRITE32(0);
2138 WRITE32(stat.ctime.tv_sec);
2139 WRITE32(stat.ctime.tv_nsec);
2140 }
2141 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2142 if ((buflen -= 12) < 0)
2143 goto out_resource;
2144 WRITE32(0);
2145 WRITE32(stat.mtime.tv_sec);
2146 WRITE32(stat.mtime.tv_nsec);
2147 }
2148 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 2149 if ((buflen -= 8) < 0)
2150 goto out_resource;
406a7ea9
FF		 2151 /*
2152 * Get parent's attributes if not ignoring crossmount
2153 * and this is the root of a cross-mounted filesystem.
2154 */
2155 if (ignore_crossmnt == 0 &&
54775491
JB		 2156 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
2157 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
2158 exp->ex_path.mnt->mnt_mountpoint, &stat);
40ee5dc6
PS		 2159 if (err)
2160 goto out_nfserr;
2161 }
2162 WRITE64(stat.ino);
1da177e4 2163 }
8c18f205
BH		 2164 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2165 WRITE32(3);
2166 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2167 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2168 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2169 }
7e705706 2170
1da177e4
LT		 2171 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2172 *countp = p - buffer;
2173 status = nfs_ok;
2174
2175out:
28e05dd8 2176 kfree(acl);
1da177e4
LT		 2177 if (fhp == &tempfh)
2178 fh_put(&tempfh);
2179 return status;
2180out_nfserr:
b8dd7b9a 2181 status = nfserrno(err);
1da177e4
LT		 2182 goto out;
2183out_resource:
2184 *countp = 0;
2185 status = nfserr_resource;
2186 goto out;
2187out_serverfault:
2188 status = nfserr_serverfault;
2189 goto out;
2190}
2191
c0ce6ec8
BF		 2192static inline int attributes_need_mount(u32 *bmval)
2193{
2194 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2195 return 1;
2196 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2197 return 1;
2198 return 0;
2199}
2200
b37ad28b 2201static __be32
1da177e4 2202nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2ebbc012 2203 const char *name, int namlen, __be32 *p, int *buflen)
1da177e4
LT		 2204{
2205 struct svc_export *exp = cd->rd_fhp->fh_export;
2206 struct dentry *dentry;
b37ad28b 2207 __be32 nfserr;
406a7ea9 2208 int ignore_crossmnt = 0;
1da177e4
LT		 2209
2210 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2211 if (IS_ERR(dentry))
2212 return nfserrno(PTR_ERR(dentry));
2213
2214 exp_get(exp);
406a7ea9
FF		 2215 /*
2216 * In the case of a mountpoint, the client may be asking for
2217 * attributes that are only properties of the underlying filesystem
2218 * as opposed to the cross-mounted file system. In such a case,
2219 * we will not follow the cross mount and will fill the attribtutes
2220 * directly from the mountpoint dentry.
2221 */
c0ce6ec8 2222 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
406a7ea9
FF		 2223 ignore_crossmnt = 1;
2224 else if (d_mountpoint(dentry)) {
021d3a72
BF		 2225 int err;
2226
dcb488a3
AA		 2227 /*
2228 * Why the heck aren't we just using nfsd_lookup??
2229 * Different "."/".." handling? Something else?
2230 * At least, add a comment here to explain....
2231 */
021d3a72
BF		 2232 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2233 if (err) {
2234 nfserr = nfserrno(err);
1da177e4
LT		 2235 goto out_put;
2236 }
dcb488a3
AA		 2237 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2238 if (nfserr)
2239 goto out_put;
1da177e4
LT		 2240
2241 }
2242 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 2243 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2244out_put:
2245 dput(dentry);
2246 exp_put(exp);
2247 return nfserr;
2248}
2249
2ebbc012 2250static __be32 *
b37ad28b 2251nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2252{
2ebbc012 2253 __be32 *attrlenp;
1da177e4
LT		 2254
2255 if (buflen < 6)
2256 return NULL;
2257 *p++ = htonl(2);
2258 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2259 *p++ = htonl(0); /* bmval1 */
2260
2261 attrlenp = p++;
2262 *p++ = nfserr; /* no htonl */
2263 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2264 return p;
2265}
2266
2267static int
a0ad13ef
N		 2268nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2269 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2270{
a0ad13ef 2271 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2272 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2273 int buflen;
2ebbc012 2274 __be32 *p = cd->buffer;
b37ad28b 2275 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2276
2277 /* In nfsv4, "." and ".." never make it onto the wire.. */
2278 if (name && isdotent(name, namlen)) {
2279 cd->common.err = nfs_ok;
2280 return 0;
2281 }
2282
2283 if (cd->offset)
2284 xdr_encode_hyper(cd->offset, (u64) offset);
2285
2286 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2287 if (buflen < 0)
2288 goto fail;
2289
2290 *p++ = xdr_one; /* mark entry present */
2291 cd->offset = p; /* remember pointer */
2292 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2293 p = xdr_encode_array(p, name, namlen); /* name length & name */
2294
2295 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2296 switch (nfserr) {
2297 case nfs_ok:
2298 p += buflen;
2299 break;
2300 case nfserr_resource:
2301 nfserr = nfserr_toosmall;
2302 goto fail;
2303 case nfserr_dropit:
2304 goto fail;
2305 default:
2306 /*
2307 * If the client requested the RDATTR_ERROR attribute,
2308 * we stuff the error code into this attribute
2309 * and continue. If this attribute was not requested,
2310 * then in accordance with the spec, we fail the
2311 * entire READDIR operation(!)
2312 */
2313 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2314 goto fail;
1da177e4 2315 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2316 if (p == NULL) {
2317 nfserr = nfserr_toosmall;
1da177e4 2318 goto fail;
34081efc 2319 }
1da177e4
LT		 2320 }
2321 cd->buflen -= (p - cd->buffer);
2322 cd->buffer = p;
2323 cd->common.err = nfs_ok;
2324 return 0;
2325fail:
2326 cd->common.err = nfserr;
2327 return -EINVAL;
2328}
2329
e2f282b9
BH		 2330static void
2331nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2332{
bc749ca4 2333 __be32 *p;
e2f282b9
BH		 2334
2335 RESERVE_SPACE(sizeof(stateid_t));
2336 WRITE32(sid->si_generation);
2337 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2338 ADJUST_ARGS();
2339}
2340
695e12f8 2341static __be32
b37ad28b 2342nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2343{
bc749ca4 2344 __be32 *p;
1da177e4
LT		 2345
2346 if (!nfserr) {
2347 RESERVE_SPACE(8);
2348 WRITE32(access->ac_supported);
2349 WRITE32(access->ac_resp_access);
2350 ADJUST_ARGS();
2351 }
695e12f8 2352 return nfserr;
1da177e4
LT		 2353}
2354
695e12f8 2355static __be32
b37ad28b 2356nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4
LT		 2357{
2358 ENCODE_SEQID_OP_HEAD;
2359
e2f282b9
BH		 2360 if (!nfserr)
2361 nfsd4_encode_stateid(resp, &close->cl_stateid);
2362
1da177e4 2363 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
695e12f8 2364 return nfserr;
1da177e4
LT		 2365}
2366
2367
695e12f8 2368static __be32
b37ad28b 2369nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2370{
bc749ca4 2371 __be32 *p;
1da177e4
LT		 2372
2373 if (!nfserr) {
2374 RESERVE_SPACE(8);
2375 WRITEMEM(commit->co_verf.data, 8);
2376 ADJUST_ARGS();
2377 }
695e12f8 2378 return nfserr;
1da177e4
LT		 2379}
2380
695e12f8 2381static __be32
b37ad28b 2382nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2383{
bc749ca4 2384 __be32 *p;
1da177e4
LT		 2385
2386 if (!nfserr) {
2387 RESERVE_SPACE(32);
c654b8a9 2388 write_cinfo(&p, &create->cr_cinfo);
1da177e4
LT		 2389 WRITE32(2);
2390 WRITE32(create->cr_bmval[0]);
2391 WRITE32(create->cr_bmval[1]);
2392 ADJUST_ARGS();
2393 }
695e12f8 2394 return nfserr;
1da177e4
LT		 2395}
2396
b37ad28b
AV		 2397static __be32
2398nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2399{
2400 struct svc_fh *fhp = getattr->ga_fhp;
2401 int buflen;
2402
2403 if (nfserr)
2404 return nfserr;
2405
2406 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2407 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2408 resp->p, &buflen, getattr->ga_bmval,
406a7ea9 2409 resp->rqstp, 0);
1da177e4
LT		 2410 if (!nfserr)
2411 resp->p += buflen;
2412 return nfserr;
2413}
2414
695e12f8
BH		 2415static __be32
2416nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2417{
695e12f8 2418 struct svc_fh *fhp = *fhpp;
1da177e4 2419 unsigned int len;
bc749ca4 2420 __be32 *p;
1da177e4
LT		 2421
2422 if (!nfserr) {
2423 len = fhp->fh_handle.fh_size;
2424 RESERVE_SPACE(len + 4);
2425 WRITE32(len);
2426 WRITEMEM(&fhp->fh_handle.fh_base, len);
2427 ADJUST_ARGS();
2428 }
695e12f8 2429 return nfserr;
1da177e4
LT		 2430}
2431
2432/*
2433* Including all fields other than the name, a LOCK4denied structure requires
2434* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2435*/
2436static void
2437nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2438{
bc749ca4 2439 __be32 *p;
1da177e4
LT		 2440
2441 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2442 WRITE64(ld->ld_start);
2443 WRITE64(ld->ld_length);
2444 WRITE32(ld->ld_type);
2445 if (ld->ld_sop) {
2446 WRITEMEM(&ld->ld_clientid, 8);
2447 WRITE32(ld->ld_sop->so_owner.len);
2448 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2449 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2450 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2451 WRITE64((u64)0); /* clientid */
2452 WRITE32(0); /* length of owner name */
2453 }
2454 ADJUST_ARGS();
2455}
2456
695e12f8 2457static __be32
b37ad28b 2458nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2459{
1da177e4
LT		 2460 ENCODE_SEQID_OP_HEAD;
2461
e2f282b9
BH		 2462 if (!nfserr)
2463 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2464 else if (nfserr == nfserr_denied)
1da177e4
LT		 2465 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2466
3a65588a 2467 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
695e12f8 2468 return nfserr;
1da177e4
LT		 2469}
2470
695e12f8 2471static __be32
b37ad28b 2472nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2473{
2474 if (nfserr == nfserr_denied)
2475 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2476 return nfserr;
1da177e4
LT		 2477}
2478
695e12f8 2479static __be32
b37ad28b 2480nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4
LT		 2481{
2482 ENCODE_SEQID_OP_HEAD;
2483
e2f282b9
BH		 2484 if (!nfserr)
2485 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2486
1da177e4 2487 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
695e12f8 2488 return nfserr;
1da177e4
LT		 2489}
2490
2491
695e12f8 2492static __be32
b37ad28b 2493nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2494{
bc749ca4 2495 __be32 *p;
1da177e4
LT		 2496
2497 if (!nfserr) {
2498 RESERVE_SPACE(20);
c654b8a9 2499 write_cinfo(&p, &link->li_cinfo);
1da177e4
LT		 2500 ADJUST_ARGS();
2501 }
695e12f8 2502 return nfserr;
1da177e4
LT		 2503}
2504
2505
695e12f8 2506static __be32
b37ad28b 2507nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2508{
bc749ca4 2509 __be32 *p;
1da177e4
LT		 2510 ENCODE_SEQID_OP_HEAD;
2511
2512 if (nfserr)
2513 goto out;
2514
e2f282b9
BH		 2515 nfsd4_encode_stateid(resp, &open->op_stateid);
2516 RESERVE_SPACE(40);
c654b8a9 2517 write_cinfo(&p, &open->op_cinfo);
1da177e4
LT		 2518 WRITE32(open->op_rflags);
2519 WRITE32(2);
2520 WRITE32(open->op_bmval[0]);
2521 WRITE32(open->op_bmval[1]);
2522 WRITE32(open->op_delegate_type);
2523 ADJUST_ARGS();
2524
2525 switch (open->op_delegate_type) {
2526 case NFS4_OPEN_DELEGATE_NONE:
2527 break;
2528 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2529 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2530 RESERVE_SPACE(20);
7b190fec 2531 WRITE32(open->op_recall);
1da177e4
LT		 2532
2533 /*
2534 * TODO: ACE's in delegations
2535 */
2536 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2537 WRITE32(0);
2538 WRITE32(0);
2539 WRITE32(0); /* XXX: is NULL principal ok? */
2540 ADJUST_ARGS();
2541 break;
2542 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2543 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2544 RESERVE_SPACE(32);
1da177e4
LT		 2545 WRITE32(0);
2546
2547 /*
2548 * TODO: space_limit's in delegations
2549 */
2550 WRITE32(NFS4_LIMIT_SIZE);
2551 WRITE32(~(u32)0);
2552 WRITE32(~(u32)0);
2553
2554 /*
2555 * TODO: ACE's in delegations
2556 */
2557 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2558 WRITE32(0);
2559 WRITE32(0);
2560 WRITE32(0); /* XXX: is NULL principal ok? */
2561 ADJUST_ARGS();
2562 break;
2563 default:
2564 BUG();
2565 }
2566 /* XXX save filehandle here */
2567out:
2568 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
695e12f8 2569 return nfserr;
1da177e4
LT		 2570}
2571
695e12f8 2572static __be32
b37ad28b 2573nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4
LT		 2574{
2575 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2576
2577 if (!nfserr)
2578 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4
LT		 2579
2580 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
695e12f8 2581 return nfserr;
1da177e4
LT		 2582}
2583
695e12f8 2584static __be32
b37ad28b 2585nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4
LT		 2586{
2587 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2588
2589 if (!nfserr)
2590 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4
LT		 2591
2592 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
695e12f8 2593 return nfserr;
1da177e4
LT		 2594}
2595
b37ad28b
AV		 2596static __be32
2597nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2598 struct nfsd4_read *read)
1da177e4
LT		 2599{
2600 u32 eof;
2601 int v, pn;
2602 unsigned long maxcount;
2603 long len;
bc749ca4 2604 __be32 *p;
1da177e4
LT		 2605
2606 if (nfserr)
2607 return nfserr;
2608 if (resp->xbuf->page_len)
2609 return nfserr_resource;
2610
2611 RESERVE_SPACE(8); /* eof flag and byte count */
2612
7adae489 2613 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2614 if (maxcount > read->rd_length)
2615 maxcount = read->rd_length;
2616
2617 len = maxcount;
2618 v = 0;
2619 while (len > 0) {
44524359 2620 pn = resp->rqstp->rq_resused++;
3cc03b16 2621 resp->rqstp->rq_vec[v].iov_base =
44524359 2622 page_address(resp->rqstp->rq_respages[pn]);
3cc03b16 2623 resp->rqstp->rq_vec[v].iov_len =
44524359 2624 len < PAGE_SIZE ? len : PAGE_SIZE;
1da177e4
LT		 2625 v++;
2626 len -= PAGE_SIZE;
2627 }
2628 read->rd_vlen = v;
2629
2630 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2631 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2632 &maxcount);
2633
2634 if (nfserr == nfserr_symlink)
2635 nfserr = nfserr_inval;
2636 if (nfserr)
2637 return nfserr;
44524359
N		 2638 eof = (read->rd_offset + maxcount >=
2639 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2640
2641 WRITE32(eof);
2642 WRITE32(maxcount);
2643 ADJUST_ARGS();
6ed6decc
N		 2644 resp->xbuf->head[0].iov_len = (char*)p
2645 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2646 resp->xbuf->page_len = maxcount;
2647
6ed6decc 2648 /* Use rest of head for padding and remaining ops: */
6ed6decc 2649 resp->xbuf->tail[0].iov_base = p;
1da177e4 2650 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2651 if (maxcount&3) {
6ed6decc
N		 2652 RESERVE_SPACE(4);
2653 WRITE32(0);
1da177e4
LT		 2654 resp->xbuf->tail[0].iov_base += maxcount&3;
2655 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2656 ADJUST_ARGS();
1da177e4
LT		 2657 }
2658 return 0;
2659}
2660
b37ad28b
AV		 2661static __be32
2662nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 2663{
2664 int maxcount;
2665 char *page;
bc749ca4 2666 __be32 *p;
1da177e4
LT		 2667
2668 if (nfserr)
2669 return nfserr;
2670 if (resp->xbuf->page_len)
2671 return nfserr_resource;
2672
44524359 2673 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2674
2675 maxcount = PAGE_SIZE;
2676 RESERVE_SPACE(4);
2677
2678 /*
2679 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2680 * if they would overflow the buffer. Is this kosher in NFSv4? If
2681 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2682 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2683 */
2684 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2685 if (nfserr == nfserr_isdir)
2686 return nfserr_inval;
2687 if (nfserr)
2688 return nfserr;
2689
2690 WRITE32(maxcount);
2691 ADJUST_ARGS();
6ed6decc
N		 2692 resp->xbuf->head[0].iov_len = (char*)p
2693 - (char*)resp->xbuf->head[0].iov_base;
2694 resp->xbuf->page_len = maxcount;
1da177e4 2695
6ed6decc 2696 /* Use rest of head for padding and remaining ops: */
6ed6decc 2697 resp->xbuf->tail[0].iov_base = p;
1da177e4 2698 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2699 if (maxcount&3) {
6ed6decc
N		 2700 RESERVE_SPACE(4);
2701 WRITE32(0);
1da177e4
LT		 2702 resp->xbuf->tail[0].iov_base += maxcount&3;
2703 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2704 ADJUST_ARGS();
1da177e4
LT		 2705 }
2706 return 0;
2707}
2708
b37ad28b
AV		 2709static __be32
2710nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 2711{
2712 int maxcount;
2713 loff_t offset;
2ebbc012 2714 __be32 *page, *savep, *tailbase;
bc749ca4 2715 __be32 *p;
1da177e4
LT		 2716
2717 if (nfserr)
2718 return nfserr;
2719 if (resp->xbuf->page_len)
2720 return nfserr_resource;
2721
2722 RESERVE_SPACE(8); /* verifier */
2723 savep = p;
2724
2725 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2726 WRITE32(0);
2727 WRITE32(0);
2728 ADJUST_ARGS();
2729 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 2730 tailbase = p;
1da177e4
LT		 2731
2732 maxcount = PAGE_SIZE;
2733 if (maxcount > readdir->rd_maxcount)
2734 maxcount = readdir->rd_maxcount;
2735
2736 /*
2737 * Convert from bytes to words, account for the two words already
2738 * written, make sure to leave two words at the end for the next
2739 * pointer and eof field.
2740 */
2741 maxcount = (maxcount >> 2) - 4;
2742 if (maxcount < 0) {
2743 nfserr = nfserr_toosmall;
2744 goto err_no_verf;
2745 }
2746
44524359 2747 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2748 readdir->common.err = 0;
2749 readdir->buflen = maxcount;
2750 readdir->buffer = page;
2751 readdir->offset = NULL;
2752
2753 offset = readdir->rd_cookie;
2754 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2755 &offset,
2756 &readdir->common, nfsd4_encode_dirent);
2757 if (nfserr == nfs_ok &&
2758 readdir->common.err == nfserr_toosmall &&
2759 readdir->buffer == page)
2760 nfserr = nfserr_toosmall;
2761 if (nfserr == nfserr_symlink)
2762 nfserr = nfserr_notdir;
2763 if (nfserr)
2764 goto err_no_verf;
2765
2766 if (readdir->offset)
2767 xdr_encode_hyper(readdir->offset, offset);
2768
2769 p = readdir->buffer;
2770 *p++ = 0; /* no more entries */
2771 *p++ = htonl(readdir->common.err == nfserr_eof);
44524359
N		 2772 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2773 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
1da177e4 2774
bb6e8a9f 2775 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 2776 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 2777 resp->xbuf->tail[0].iov_len = 0;
2778 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 2779 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 2780
2781 return 0;
2782err_no_verf:
2783 p = savep;
2784 ADJUST_ARGS();
2785 return nfserr;
2786}
2787
695e12f8 2788static __be32
b37ad28b 2789nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 2790{
bc749ca4 2791 __be32 *p;
1da177e4
LT		 2792
2793 if (!nfserr) {
2794 RESERVE_SPACE(20);
c654b8a9 2795 write_cinfo(&p, &remove->rm_cinfo);
1da177e4
LT		 2796 ADJUST_ARGS();
2797 }
695e12f8 2798 return nfserr;
1da177e4
LT		 2799}
2800
695e12f8 2801static __be32
b37ad28b 2802nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 2803{
bc749ca4 2804 __be32 *p;
1da177e4
LT		 2805
2806 if (!nfserr) {
2807 RESERVE_SPACE(40);
c654b8a9
BF		 2808 write_cinfo(&p, &rename->rn_sinfo);
2809 write_cinfo(&p, &rename->rn_tinfo);
1da177e4
LT		 2810 ADJUST_ARGS();
2811 }
695e12f8 2812 return nfserr;
1da177e4
LT		 2813}
2814
695e12f8 2815static __be32
ca5c8cde 2816nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
dcb488a3
AA		 2817 struct nfsd4_secinfo *secinfo)
2818{
2819 int i = 0;
2820 struct svc_export *exp = secinfo->si_exp;
4796f457
BF		 2821 u32 nflavs;
2822 struct exp_flavor_info *flavs;
2823 struct exp_flavor_info def_flavs[2];
bc749ca4 2824 __be32 *p;
dcb488a3
AA		 2825
2826 if (nfserr)
2827 goto out;
4796f457
BF		 2828 if (exp->ex_nflavors) {
2829 flavs = exp->ex_flavors;
2830 nflavs = exp->ex_nflavors;
2831 } else { /* Handling of some defaults in absence of real secinfo: */
2832 flavs = def_flavs;
2833 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2834 nflavs = 2;
2835 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2836 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2837 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2838 nflavs = 1;
2839 flavs[0].pseudoflavor
2840 = svcauth_gss_flavor(exp->ex_client);
2841 } else {
2842 nflavs = 1;
2843 flavs[0].pseudoflavor
2844 = exp->ex_client->flavour->flavour;
2845 }
2846 }
2847
dcb488a3 2848 RESERVE_SPACE(4);
4796f457 2849 WRITE32(nflavs);
dcb488a3 2850 ADJUST_ARGS();
4796f457
BF		 2851 for (i = 0; i < nflavs; i++) {
2852 u32 flav = flavs[i].pseudoflavor;
dcb488a3
AA		 2853 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2854
2855 if (gm) {
2856 RESERVE_SPACE(4);
2857 WRITE32(RPC_AUTH_GSS);
2858 ADJUST_ARGS();
2859 RESERVE_SPACE(4 + gm->gm_oid.len);
2860 WRITE32(gm->gm_oid.len);
2861 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2862 ADJUST_ARGS();
2863 RESERVE_SPACE(4);
2864 WRITE32(0); /* qop */
2865 ADJUST_ARGS();
2866 RESERVE_SPACE(4);
2867 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2868 ADJUST_ARGS();
2869 gss_mech_put(gm);
2870 } else {
2871 RESERVE_SPACE(4);
2872 WRITE32(flav);
2873 ADJUST_ARGS();
2874 }
2875 }
2876out:
2877 if (exp)
2878 exp_put(exp);
695e12f8 2879 return nfserr;
dcb488a3
AA		 2880}
2881
1da177e4
LT		 2882/*
2883 * The SETATTR encode routine is special -- it always encodes a bitmap,
2884 * regardless of the error status.
2885 */
695e12f8 2886static __be32
b37ad28b 2887nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 2888{
bc749ca4 2889 __be32 *p;
1da177e4
LT		 2890
2891 RESERVE_SPACE(12);
2892 if (nfserr) {
2893 WRITE32(2);
2894 WRITE32(0);
2895 WRITE32(0);
2896 }
2897 else {
2898 WRITE32(2);
2899 WRITE32(setattr->sa_bmval[0]);
2900 WRITE32(setattr->sa_bmval[1]);
2901 }
2902 ADJUST_ARGS();
695e12f8 2903 return nfserr;
1da177e4
LT		 2904}
2905
695e12f8 2906static __be32
b37ad28b 2907nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 2908{
bc749ca4 2909 __be32 *p;
1da177e4
LT		 2910
2911 if (!nfserr) {
2912 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2913 WRITEMEM(&scd->se_clientid, 8);
2914 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2915 ADJUST_ARGS();
2916 }
2917 else if (nfserr == nfserr_clid_inuse) {
2918 RESERVE_SPACE(8);
2919 WRITE32(0);
2920 WRITE32(0);
2921 ADJUST_ARGS();
2922 }
695e12f8 2923 return nfserr;
1da177e4
LT		 2924}
2925
695e12f8 2926static __be32
b37ad28b 2927nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 2928{
bc749ca4 2929 __be32 *p;
1da177e4
LT		 2930
2931 if (!nfserr) {
2932 RESERVE_SPACE(16);
2933 WRITE32(write->wr_bytes_written);
2934 WRITE32(write->wr_how_written);
2935 WRITEMEM(write->wr_verifier.data, 8);
2936 ADJUST_ARGS();
2937 }
695e12f8 2938 return nfserr;
1da177e4
LT		 2939}
2940
2db134eb
AA		 2941static __be32
2942nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2943 struct nfsd4_exchange_id *exid)
2944{
bc749ca4 2945 __be32 *p;
0733d213
AA		 2946 char *major_id;
2947 char *server_scope;
2948 int major_id_sz;
2949 int server_scope_sz;
2950 uint64_t minor_id = 0;
2951
2952 if (nfserr)
2953 return nfserr;
2954
2955 major_id = utsname()->nodename;
2956 major_id_sz = strlen(major_id);
2957 server_scope = utsname()->nodename;
2958 server_scope_sz = strlen(server_scope);
2959
2960 RESERVE_SPACE(
2961 8 /* eir_clientid */ +
2962 4 /* eir_sequenceid */ +
2963 4 /* eir_flags */ +
2964 4 /* spr_how (SP4_NONE) */ +
2965 8 /* so_minor_id */ +
2966 4 /* so_major_id.len */ +
2967 (XDR_QUADLEN(major_id_sz) * 4) +
2968 4 /* eir_server_scope.len */ +
2969 (XDR_QUADLEN(server_scope_sz) * 4) +
2970 4 /* eir_server_impl_id.count (0) */);
2971
2972 WRITEMEM(&exid->clientid, 8);
2973 WRITE32(exid->seqid);
2974 WRITE32(exid->flags);
2975
2976 /* state_protect4_r. Currently only support SP4_NONE */
2977 BUG_ON(exid->spa_how != SP4_NONE);
2978 WRITE32(exid->spa_how);
2979
2980 /* The server_owner struct */
2981 WRITE64(minor_id); /* Minor id */
2982 /* major id */
2983 WRITE32(major_id_sz);
2984 WRITEMEM(major_id, major_id_sz);
2985
2986 /* Server scope */
2987 WRITE32(server_scope_sz);
2988 WRITEMEM(server_scope, server_scope_sz);
2989
2990 /* Implementation id */
2991 WRITE32(0); /* zero length nfs_impl_id4 array */
2992 ADJUST_ARGS();
2993 return 0;
2db134eb
AA		 2994}
2995
2996static __be32
2997nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
2998 struct nfsd4_create_session *sess)
2999{
bc749ca4 3000 __be32 *p;
ec6b5d7b
AA		 3001
3002 if (nfserr)
3003 return nfserr;
3004
3005 RESERVE_SPACE(24);
3006 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3007 WRITE32(sess->seqid);
3008 WRITE32(sess->flags);
3009 ADJUST_ARGS();
3010
3011 RESERVE_SPACE(28);
3012 WRITE32(0); /* headerpadsz */
3013 WRITE32(sess->fore_channel.maxreq_sz);
3014 WRITE32(sess->fore_channel.maxresp_sz);
3015 WRITE32(sess->fore_channel.maxresp_cached);
3016 WRITE32(sess->fore_channel.maxops);
3017 WRITE32(sess->fore_channel.maxreqs);
3018 WRITE32(sess->fore_channel.nr_rdma_attrs);
3019 ADJUST_ARGS();
3020
3021 if (sess->fore_channel.nr_rdma_attrs) {
3022 RESERVE_SPACE(4);
3023 WRITE32(sess->fore_channel.rdma_attrs);
3024 ADJUST_ARGS();
3025 }
3026
3027 RESERVE_SPACE(28);
3028 WRITE32(0); /* headerpadsz */
3029 WRITE32(sess->back_channel.maxreq_sz);
3030 WRITE32(sess->back_channel.maxresp_sz);
3031 WRITE32(sess->back_channel.maxresp_cached);
3032 WRITE32(sess->back_channel.maxops);
3033 WRITE32(sess->back_channel.maxreqs);
3034 WRITE32(sess->back_channel.nr_rdma_attrs);
3035 ADJUST_ARGS();
3036
3037 if (sess->back_channel.nr_rdma_attrs) {
3038 RESERVE_SPACE(4);
3039 WRITE32(sess->back_channel.rdma_attrs);
3040 ADJUST_ARGS();
3041 }
3042 return 0;
2db134eb
AA		 3043}
3044
3045static __be32
3046nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3047 struct nfsd4_destroy_session *destroy_session)
3048{
2db134eb
AA		 3049 return nfserr;
3050}
3051
bf864a31 3052__be32
2db134eb
AA		 3053nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3054 struct nfsd4_sequence *seq)
3055{
bc749ca4 3056 __be32 *p;
b85d4c01
BH		 3057
3058 if (nfserr)
3059 return nfserr;
3060
3061 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3062 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3063 WRITE32(seq->seqid);
3064 WRITE32(seq->slotid);
3065 WRITE32(seq->maxslots);
3066 /*
3067 * FIXME: for now:
3068 * target_maxslots = maxslots
3069 * status_flags = 0
3070 */
3071 WRITE32(seq->maxslots);
3072 WRITE32(0);
3073
3074 ADJUST_ARGS();
3075 return 0;
2db134eb
AA		 3076}
3077
695e12f8
BH		 3078static __be32
3079nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3080{
3081 return nfserr;
3082}
3083
3084typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3085
2db134eb
AA		 3086/*
3087 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3088 * since we don't need to filter out obsolete ops as this is
3089 * done in the decoding phase.
3090 */
695e12f8 3091static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3092 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3093 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3094 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3095 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3096 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3097 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3098 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3099 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3100 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3101 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3102 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3103 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3104 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3105 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3106 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3107 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3108 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3109 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3110 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3111 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3112 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3113 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3114 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3115 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3116 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3117 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3118 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3119 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3120 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3121 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3122 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3123 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3124 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3125 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3126 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3127 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3128 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3129
3130 /* NFSv4.1 operations */
3131 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3132 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3133 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3134 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3135 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3136 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3137 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3138 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3139 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3140 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3141 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3142 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3143 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
3144 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3145 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3146 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3147 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3148 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3149 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3150};
3151
496c262c
AA		 3152/*
3153 * Calculate the total amount of memory that the compound response has taken
3154 * after encoding the current operation.
3155 *
3156 * pad: add on 8 bytes for the next operation's op_code and status so that
3157 * there is room to cache a failure on the next operation.
3158 *
3159 * Compare this length to the session se_fmaxresp_cached.
3160 *
3161 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3162 * will be at least a page and will therefore hold the xdr_buf head.
3163 */
3164static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3165{
3166 int status = 0;
3167 struct xdr_buf *xb = &resp->rqstp->rq_res;
3168 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3169 struct nfsd4_session *session = NULL;
3170 struct nfsd4_slot *slot = resp->cstate.slot;
3171 u32 length, tlen = 0, pad = 8;
3172
3173 if (!nfsd4_has_session(&resp->cstate))
3174 return status;
3175
3176 session = resp->cstate.session;
3177 if (session == NULL || slot->sl_cache_entry.ce_cachethis == 0)
3178 return status;
3179
3180 if (resp->opcnt >= args->opcnt)
3181 pad = 0; /* this is the last operation */
3182
3183 if (xb->page_len == 0) {
3184 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3185 } else {
3186 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3187 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3188
3189 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3190 }
3191 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3192 length, xb->page_len, tlen, pad);
3193
3194 if (length <= session->se_fmaxresp_cached)
3195 return status;
3196 else
3197 return nfserr_rep_too_big_to_cache;
3198}
3199
1da177e4
LT		 3200void
3201nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3202{
2ebbc012 3203 __be32 *statp;
bc749ca4 3204 __be32 *p;
1da177e4
LT		 3205
3206 RESERVE_SPACE(8);
3207 WRITE32(op->opnum);
3208 statp = p++; /* to be backfilled at the end */
3209 ADJUST_ARGS();
3210
695e12f8
BH		 3211 if (op->opnum == OP_ILLEGAL)
3212 goto status;
3213 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3214 !nfsd4_enc_ops[op->opnum]);
3215 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
496c262c
AA		 3216 /* nfsd4_check_drc_limit guarantees enough room for error status */
3217 if (!op->status && nfsd4_check_drc_limit(resp))
3218 op->status = nfserr_rep_too_big_to_cache;
695e12f8 3219status:
1da177e4
LT		 3220 /*
3221 * Note: We write the status directly, instead of using WRITE32(),
3222 * since it is already in network byte order.
3223 */
3224 *statp = op->status;
3225}
3226
3227/*
3228 * Encode the reply stored in the stateowner reply cache
3229 *
3230 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3231 * previously sent already encoded operation.
3232 *
3233 * called with nfs4_lock_state() held
3234 */
3235void
3236nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3237{
bc749ca4 3238 __be32 *p;
1da177e4
LT		 3239 struct nfs4_replay *rp = op->replay;
3240
3241 BUG_ON(!rp);
3242
3243 RESERVE_SPACE(8);
3244 WRITE32(op->opnum);
3245 *p++ = rp->rp_status; /* already xdr'ed */
3246 ADJUST_ARGS();
3247
3248 RESERVE_SPACE(rp->rp_buflen);
3249 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3250 ADJUST_ARGS();
3251}
3252
1da177e4 3253int
2ebbc012 3254nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3255{
3256 return xdr_ressize_check(rqstp, p);
3257}
3258
3259void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3260{
3261 if (args->ops != args->iops) {
3262 kfree(args->ops);
3263 args->ops = args->iops;
3264 }
f99d49ad
JJ		 3265 kfree(args->tmpp);
3266 args->tmpp = NULL;
1da177e4
LT		 3267 while (args->to_free) {
3268 struct tmpbuf *tb = args->to_free;
3269 args->to_free = tb->next;
3270 tb->release(tb->buf);
3271 kfree(tb);
3272 }
3273}
3274
3275int
2ebbc012 3276nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3277{
b37ad28b 3278 __be32 status;
1da177e4
LT		 3279
3280 args->p = p;
3281 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3282 args->pagelist = rqstp->rq_arg.pages;
3283 args->pagelen = rqstp->rq_arg.page_len;
3284 args->tmpp = NULL;
3285 args->to_free = NULL;
3286 args->ops = args->iops;
3287 args->rqstp = rqstp;
3288
3289 status = nfsd4_decode_compound(args);
3290 if (status) {
3291 nfsd4_release_compoundargs(args);
3292 }
3293 return !status;
3294}
3295
3296int
2ebbc012 3297nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3298{
3299 /*
3300 * All that remains is to write the tag and operation count...
3301 */
3302 struct kvec *iov;
3303 p = resp->tagp;
3304 *p++ = htonl(resp->taglen);
3305 memcpy(p, resp->tag, resp->taglen);
3306 p += XDR_QUADLEN(resp->taglen);
3307 *p++ = htonl(resp->opcnt);
3308
3309 if (rqstp->rq_res.page_len)
3310 iov = &rqstp->rq_res.tail[0];
3311 else
3312 iov = &rqstp->rq_res.head[0];
3313 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3314 BUG_ON(iov->iov_len > PAGE_SIZE);
6668958f 3315 if (nfsd4_has_session(&resp->cstate)) {
bf864a31
AA		 3316 if (resp->cstate.status == nfserr_replay_cache &&
3317 !nfsd4_not_cached(resp)) {
da3846a2
AA		 3318 iov->iov_len = resp->cstate.iovlen;
3319 } else {
3320 nfsd4_store_cache_entry(resp);
3321 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3322 resp->cstate.slot->sl_inuse = 0;
3323 }
3324 if (resp->cstate.session)
3325 nfsd4_put_session(resp->cstate.session);
3326 }
1da177e4
LT		 3327 return 1;
3328}
3329
3330/*
3331 * Local variables:
3332 * c-basic-offset: 8
3333 * End:
3334 */
kernel source for telekom puls (alcatel/mediatek)