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nfsd: remove redundant declarations
[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
5a0e3ad6 43#include <linux/slab.h>
1da177e4 44#include <linux/namei.h>
341eb184 45#include <linux/statfs.h>
0733d213 46#include <linux/utsname.h>
17456804 47#include <linux/pagemap.h>
4796f457 48#include <linux/sunrpc/svcauth_gss.h>
9a74af21 49
2ca72e17
BF		 50#include "idmap.h"
51#include "acl.h"
9a74af21 52#include "xdr4.h"
0a3adade 53#include "vfs.h"
17456804 54#include "state.h"
1091006c 55#include "cache.h"
2ca72e17 56
1da177e4
LT		 57#define NFSDDBG_FACILITY NFSDDBG_XDR
58
42ca0993
BF		 59/*
60 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
61 * directory in order to indicate to the client that a filesystem boundary is present
62 * We use a fixed fsid for a referral
63 */
64#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
65#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
66
b37ad28b 67static __be32
a36b1725 68check_filename(char *str, int len)
1da177e4
LT		 69{
70 int i;
71
72 if (len == 0)
73 return nfserr_inval;
74 if (isdotent(str, len))
a36b1725 75 return nfserr_badname;
1da177e4
LT		 76 for (i = 0; i < len; i++)
77 if (str[i] == '/')
a36b1725 78 return nfserr_badname;
1da177e4
LT		 79 return 0;
80}
81
1da177e4 82#define DECODE_HEAD \
2ebbc012 83 __be32 *p; \
b37ad28b 84 __be32 status
1da177e4
LT		 85#define DECODE_TAIL \
86 status = 0; \
87out: \
88 return status; \
89xdr_error: \
817cb9d4
CL		 90 dprintk("NFSD: xdr error (%s:%d)\n", \
91 __FILE__, __LINE__); \
1da177e4
LT		 92 status = nfserr_bad_xdr; \
93 goto out
94
95#define READ32(x) (x) = ntohl(*p++)
96#define READ64(x) do { \
97 (x) = (u64)ntohl(*p++) << 32; \
98 (x) |= ntohl(*p++); \
99} while (0)
100#define READTIME(x) do { \
101 p++; \
102 (x) = ntohl(*p++); \
103 p++; \
104} while (0)
105#define READMEM(x,nbytes) do { \
106 x = (char *)p; \
107 p += XDR_QUADLEN(nbytes); \
108} while (0)
109#define SAVEMEM(x,nbytes) do { \
110 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
111 savemem(argp, p, nbytes) : \
112 (char *)p)) { \
817cb9d4
CL		 113 dprintk("NFSD: xdr error (%s:%d)\n", \
114 __FILE__, __LINE__); \
1da177e4
LT		 115 goto xdr_error; \
116 } \
117 p += XDR_QUADLEN(nbytes); \
118} while (0)
119#define COPYMEM(x,nbytes) do { \
120 memcpy((x), p, nbytes); \
121 p += XDR_QUADLEN(nbytes); \
122} while (0)
123
124/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
125#define READ_BUF(nbytes) do { \
126 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
127 p = argp->p; \
128 argp->p += XDR_QUADLEN(nbytes); \
129 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 130 dprintk("NFSD: xdr error (%s:%d)\n", \
131 __FILE__, __LINE__); \
1da177e4
LT		 132 goto xdr_error; \
133 } \
134} while (0)
135
ca2a05aa 136static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 137{
138 /* We want more bytes than seem to be available.
139 * Maybe we need a new page, maybe we have just run out
140 */
ca2a05aa 141 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 142 __be32 *p;
1da177e4
LT		 143 if (avail + argp->pagelen < nbytes)
144 return NULL;
145 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
146 return NULL;
147 /* ok, we can do it with the current plus the next page */
148 if (nbytes <= sizeof(argp->tmp))
149 p = argp->tmp;
150 else {
f99d49ad 151 kfree(argp->tmpp);
1da177e4
LT		 152 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
153 if (!p)
154 return NULL;
155
156 }
ca2a05aa
BF		 157 /*
158 * The following memcpy is safe because read_buf is always
159 * called with nbytes > avail, and the two cases above both
160 * guarantee p points to at least nbytes bytes.
161 */
1da177e4
LT		 162 memcpy(p, argp->p, avail);
163 /* step to next page */
164 argp->p = page_address(argp->pagelist[0]);
165 argp->pagelist++;
166 if (argp->pagelen < PAGE_SIZE) {
2bc3c117 167 argp->end = argp->p + (argp->pagelen>>2);
1da177e4
LT		 168 argp->pagelen = 0;
169 } else {
2bc3c117 170 argp->end = argp->p + (PAGE_SIZE>>2);
1da177e4
LT		 171 argp->pagelen -= PAGE_SIZE;
172 }
173 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
174 argp->p += XDR_QUADLEN(nbytes - avail);
175 return p;
176}
177
60adfc50
AA		 178static int zero_clientid(clientid_t *clid)
179{
180 return (clid->cl_boot == 0) && (clid->cl_id == 0);
181}
182
1da177e4
LT		 183static int
184defer_free(struct nfsd4_compoundargs *argp,
185 void (*release)(const void *), void *p)
186{
187 struct tmpbuf *tb;
188
189 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
190 if (!tb)
191 return -ENOMEM;
192 tb->buf = p;
193 tb->release = release;
194 tb->next = argp->to_free;
195 argp->to_free = tb;
196 return 0;
197}
198
2ebbc012 199static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 200{
1da177e4 201 if (p == argp->tmp) {
67114fe6 202 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
a4db5fe5
BF		 203 if (!p)
204 return NULL;
1da177e4 205 } else {
73dff8be 206 BUG_ON(p != argp->tmpp);
1da177e4
LT		 207 argp->tmpp = NULL;
208 }
209 if (defer_free(argp, kfree, p)) {
a4db5fe5 210 kfree(p);
1da177e4
LT		 211 return NULL;
212 } else
213 return (char *)p;
214}
215
b37ad28b 216static __be32
1da177e4
LT		 217nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
218{
219 u32 bmlen;
220 DECODE_HEAD;
221
222 bmval[0] = 0;
223 bmval[1] = 0;
7e705706 224 bmval[2] = 0;
1da177e4
LT		 225
226 READ_BUF(4);
227 READ32(bmlen);
228 if (bmlen > 1000)
229 goto xdr_error;
230
231 READ_BUF(bmlen << 2);
232 if (bmlen > 0)
233 READ32(bmval[0]);
234 if (bmlen > 1)
235 READ32(bmval[1]);
7e705706
AA		 236 if (bmlen > 2)
237 READ32(bmval[2]);
1da177e4
LT		 238
239 DECODE_TAIL;
240}
241
b37ad28b 242static __be32
3c8e0316 243nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
c0d6fc8a 244 struct iattr *iattr, struct nfs4_acl **acl)
1da177e4
LT		 245{
246 int expected_len, len = 0;
247 u32 dummy32;
248 char *buf;
b8dd7b9a 249 int host_err;
1da177e4
LT		 250
251 DECODE_HEAD;
252 iattr->ia_valid = 0;
253 if ((status = nfsd4_decode_bitmap(argp, bmval)))
254 return status;
255
1da177e4
LT		 256 READ_BUF(4);
257 READ32(expected_len);
258
259 if (bmval[0] & FATTR4_WORD0_SIZE) {
260 READ_BUF(8);
261 len += 8;
262 READ64(iattr->ia_size);
263 iattr->ia_valid |= ATTR_SIZE;
264 }
265 if (bmval[0] & FATTR4_WORD0_ACL) {
28e05dd8
BF		 266 int nace;
267 struct nfs4_ace *ace;
1da177e4
LT		 268
269 READ_BUF(4); len += 4;
270 READ32(nace);
271
28e05dd8
BF		 272 if (nace > NFS4_ACL_MAX)
273 return nfserr_resource;
274
275 *acl = nfs4_acl_new(nace);
1da177e4 276 if (*acl == NULL) {
b8dd7b9a 277 host_err = -ENOMEM;
1da177e4
LT		 278 goto out_nfserr;
279 }
28e05dd8 280 defer_free(argp, kfree, *acl);
1da177e4 281
28e05dd8
BF		 282 (*acl)->naces = nace;
283 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 284 READ_BUF(16); len += 16;
28e05dd8
BF		 285 READ32(ace->type);
286 READ32(ace->flag);
287 READ32(ace->access_mask);
1da177e4
LT		 288 READ32(dummy32);
289 READ_BUF(dummy32);
290 len += XDR_QUADLEN(dummy32) << 2;
291 READMEM(buf, dummy32);
28e05dd8 292 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 293 status = nfs_ok;
28e05dd8
BF		 294 if (ace->whotype != NFS4_ACL_WHO_NAMED)
295 ace->who = 0;
296 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 297 status = nfsd_map_name_to_gid(argp->rqstp,
28e05dd8 298 buf, dummy32, &ace->who);
1da177e4 299 else
3c726023 300 status = nfsd_map_name_to_uid(argp->rqstp,
28e05dd8 301 buf, dummy32, &ace->who);
3c726023
BF		 302 if (status)
303 return status;
1da177e4
LT		 304 }
305 } else
306 *acl = NULL;
307 if (bmval[1] & FATTR4_WORD1_MODE) {
308 READ_BUF(4);
309 len += 4;
310 READ32(iattr->ia_mode);
311 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
312 iattr->ia_valid |= ATTR_MODE;
313 }
314 if (bmval[1] & FATTR4_WORD1_OWNER) {
315 READ_BUF(4);
316 len += 4;
317 READ32(dummy32);
318 READ_BUF(dummy32);
319 len += (XDR_QUADLEN(dummy32) << 2);
320 READMEM(buf, dummy32);
47c85291
N		 321 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
322 return status;
1da177e4
LT		 323 iattr->ia_valid |= ATTR_UID;
324 }
325 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
326 READ_BUF(4);
327 len += 4;
328 READ32(dummy32);
329 READ_BUF(dummy32);
330 len += (XDR_QUADLEN(dummy32) << 2);
331 READMEM(buf, dummy32);
47c85291
N		 332 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
333 return status;
1da177e4
LT		 334 iattr->ia_valid |= ATTR_GID;
335 }
336 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
337 READ_BUF(4);
338 len += 4;
339 READ32(dummy32);
340 switch (dummy32) {
341 case NFS4_SET_TO_CLIENT_TIME:
342 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
343 all 32 bits of 'nseconds'. */
344 READ_BUF(12);
345 len += 12;
346 READ32(dummy32);
347 if (dummy32)
348 return nfserr_inval;
349 READ32(iattr->ia_atime.tv_sec);
350 READ32(iattr->ia_atime.tv_nsec);
351 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
352 return nfserr_inval;
353 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
354 break;
355 case NFS4_SET_TO_SERVER_TIME:
356 iattr->ia_valid |= ATTR_ATIME;
357 break;
358 default:
359 goto xdr_error;
360 }
361 }
1da177e4
LT		 362 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
363 READ_BUF(4);
364 len += 4;
365 READ32(dummy32);
366 switch (dummy32) {
367 case NFS4_SET_TO_CLIENT_TIME:
368 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
369 all 32 bits of 'nseconds'. */
370 READ_BUF(12);
371 len += 12;
372 READ32(dummy32);
373 if (dummy32)
374 return nfserr_inval;
375 READ32(iattr->ia_mtime.tv_sec);
376 READ32(iattr->ia_mtime.tv_nsec);
377 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
378 return nfserr_inval;
379 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
380 break;
381 case NFS4_SET_TO_SERVER_TIME:
382 iattr->ia_valid |= ATTR_MTIME;
383 break;
384 default:
385 goto xdr_error;
386 }
387 }
3c8e0316
YZ		 388 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
389 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
390 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
391 READ_BUF(expected_len - len);
392 else if (len != expected_len)
1da177e4
LT		 393 goto xdr_error;
394
395 DECODE_TAIL;
396
397out_nfserr:
b8dd7b9a 398 status = nfserrno(host_err);
1da177e4
LT		 399 goto out;
400}
401
e31a1b66
BH		 402static __be32
403nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
404{
405 DECODE_HEAD;
406
407 READ_BUF(sizeof(stateid_t));
408 READ32(sid->si_generation);
409 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
410
411 DECODE_TAIL;
412}
413
b37ad28b 414static __be32
1da177e4
LT		 415nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
416{
417 DECODE_HEAD;
418
419 READ_BUF(4);
420 READ32(access->ac_req_access);
421
422 DECODE_TAIL;
423}
424
acb2887e
BF		 425static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
426{
427 DECODE_HEAD;
12fc3e92 428 u32 dummy, uid, gid;
acb2887e
BF		 429 char *machine_name;
430 int i;
431 int nr_secflavs;
432
433 /* callback_sec_params4 */
434 READ_BUF(4);
435 READ32(nr_secflavs);
12fc3e92 436 cbs->flavor = (u32)(-1);
acb2887e
BF		 437 for (i = 0; i < nr_secflavs; ++i) {
438 READ_BUF(4);
439 READ32(dummy);
440 switch (dummy) {
441 case RPC_AUTH_NULL:
442 /* Nothing to read */
12fc3e92
BF		 443 if (cbs->flavor == (u32)(-1))
444 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 445 break;
446 case RPC_AUTH_UNIX:
447 READ_BUF(8);
448 /* stamp */
449 READ32(dummy);
450
451 /* machine name */
452 READ32(dummy);
453 READ_BUF(dummy);
454 SAVEMEM(machine_name, dummy);
455
456 /* uid, gid */
457 READ_BUF(8);
12fc3e92
BF		 458 READ32(uid);
459 READ32(gid);
acb2887e
BF		 460
461 /* more gids */
462 READ_BUF(4);
463 READ32(dummy);
464 READ_BUF(dummy * 4);
12fc3e92
BF		 465 if (cbs->flavor == (u32)(-1)) {
466 cbs->uid = uid;
467 cbs->gid = gid;
468 cbs->flavor = RPC_AUTH_UNIX;
469 }
acb2887e
BF		 470 break;
471 case RPC_AUTH_GSS:
472 dprintk("RPC_AUTH_GSS callback secflavor "
473 "not supported!\n");
474 READ_BUF(8);
475 /* gcbp_service */
476 READ32(dummy);
477 /* gcbp_handle_from_server */
478 READ32(dummy);
479 READ_BUF(dummy);
480 p += XDR_QUADLEN(dummy);
481 /* gcbp_handle_from_client */
482 READ_BUF(4);
483 READ32(dummy);
484 READ_BUF(dummy);
485 break;
486 default:
487 dprintk("Illegal callback secflavor\n");
488 return nfserr_inval;
489 }
490 }
491 DECODE_TAIL;
492}
493
cb73a9f4
BF		 494static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
495{
496 DECODE_HEAD;
497
498 READ_BUF(4);
499 READ32(bc->bc_cb_program);
500 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
501
502 DECODE_TAIL;
503}
504
1d1bc8f2
BF		 505static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
506{
507 DECODE_HEAD;
1d1bc8f2
BF		 508
509 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
510 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
511 READ32(bcts->dir);
6ce2357f
BS		 512 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
513 * could help us figure out we should be using it. */
1d1bc8f2
BF		 514 DECODE_TAIL;
515}
516
b37ad28b 517static __be32
1da177e4
LT		 518nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
519{
520 DECODE_HEAD;
521
e31a1b66 522 READ_BUF(4);
1da177e4 523 READ32(close->cl_seqid);
e31a1b66 524 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 525
526 DECODE_TAIL;
527}
528
529
b37ad28b 530static __be32
1da177e4
LT		 531nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
532{
533 DECODE_HEAD;
534
535 READ_BUF(12);
536 READ64(commit->co_offset);
537 READ32(commit->co_count);
538
539 DECODE_TAIL;
540}
541
b37ad28b 542static __be32
1da177e4
LT		 543nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
544{
545 DECODE_HEAD;
546
547 READ_BUF(4);
548 READ32(create->cr_type);
549 switch (create->cr_type) {
550 case NF4LNK:
551 READ_BUF(4);
552 READ32(create->cr_linklen);
553 READ_BUF(create->cr_linklen);
554 SAVEMEM(create->cr_linkname, create->cr_linklen);
555 break;
556 case NF4BLK:
557 case NF4CHR:
558 READ_BUF(8);
559 READ32(create->cr_specdata1);
560 READ32(create->cr_specdata2);
561 break;
562 case NF4SOCK:
563 case NF4FIFO:
564 case NF4DIR:
565 default:
566 break;
567 }
568
569 READ_BUF(4);
570 READ32(create->cr_namelen);
571 READ_BUF(create->cr_namelen);
572 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 573 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 574 return status;
575
3c8e0316
YZ		 576 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
577 &create->cr_acl);
c0d6fc8a 578 if (status)
1da177e4
LT		 579 goto out;
580
581 DECODE_TAIL;
582}
583
b37ad28b 584static inline __be32
1da177e4
LT		 585nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
586{
e31a1b66 587 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 588}
589
b37ad28b 590static inline __be32
1da177e4
LT		 591nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
592{
593 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
594}
595
b37ad28b 596static __be32
1da177e4
LT		 597nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
598{
599 DECODE_HEAD;
600
601 READ_BUF(4);
602 READ32(link->li_namelen);
603 READ_BUF(link->li_namelen);
604 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 605 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 606 return status;
607
608 DECODE_TAIL;
609}
610
b37ad28b 611static __be32
1da177e4
LT		 612nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
613{
614 DECODE_HEAD;
615
1da177e4
LT		 616 /*
617 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
618 */
619 READ_BUF(28);
620 READ32(lock->lk_type);
621 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
622 goto xdr_error;
623 READ32(lock->lk_reclaim);
624 READ64(lock->lk_offset);
625 READ64(lock->lk_length);
626 READ32(lock->lk_is_new);
627
628 if (lock->lk_is_new) {
e31a1b66 629 READ_BUF(4);
1da177e4 630 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 631 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
632 if (status)
633 return status;
634 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 635 READ32(lock->lk_new_lock_seqid);
636 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
637 READ32(lock->lk_new_owner.len);
638 READ_BUF(lock->lk_new_owner.len);
639 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
640 } else {
e31a1b66
BH		 641 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
642 if (status)
643 return status;
644 READ_BUF(4);
1da177e4
LT		 645 READ32(lock->lk_old_lock_seqid);
646 }
647
648 DECODE_TAIL;
649}
650
b37ad28b 651static __be32
1da177e4
LT		 652nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
653{
654 DECODE_HEAD;
655
656 READ_BUF(32);
657 READ32(lockt->lt_type);
658 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
659 goto xdr_error;
660 READ64(lockt->lt_offset);
661 READ64(lockt->lt_length);
662 COPYMEM(&lockt->lt_clientid, 8);
663 READ32(lockt->lt_owner.len);
664 READ_BUF(lockt->lt_owner.len);
665 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
666
667 DECODE_TAIL;
668}
669
b37ad28b 670static __be32
1da177e4
LT		 671nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
672{
673 DECODE_HEAD;
674
e31a1b66 675 READ_BUF(8);
1da177e4
LT		 676 READ32(locku->lu_type);
677 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
678 goto xdr_error;
679 READ32(locku->lu_seqid);
e31a1b66
BH		 680 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
681 if (status)
682 return status;
683 READ_BUF(16);
1da177e4
LT		 684 READ64(locku->lu_offset);
685 READ64(locku->lu_length);
686
687 DECODE_TAIL;
688}
689
b37ad28b 690static __be32
1da177e4
LT		 691nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
692{
693 DECODE_HEAD;
694
695 READ_BUF(4);
696 READ32(lookup->lo_len);
697 READ_BUF(lookup->lo_len);
698 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 699 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 700 return status;
701
702 DECODE_TAIL;
703}
704
2c8bd7e0 705static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 706{
707 __be32 *p;
708 u32 w;
709
710 READ_BUF(4);
711 READ32(w);
2c8bd7e0
BH		 712 *share_access = w & NFS4_SHARE_ACCESS_MASK;
713 *deleg_want = w & NFS4_SHARE_WANT_MASK;
714 if (deleg_when)
715 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
716
04f9e664
BF		 717 switch (w & NFS4_SHARE_ACCESS_MASK) {
718 case NFS4_SHARE_ACCESS_READ:
719 case NFS4_SHARE_ACCESS_WRITE:
720 case NFS4_SHARE_ACCESS_BOTH:
721 break;
722 default:
723 return nfserr_bad_xdr;
724 }
fc0d14fe 725 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 726 if (!w)
727 return nfs_ok;
728 if (!argp->minorversion)
729 return nfserr_bad_xdr;
730 switch (w & NFS4_SHARE_WANT_MASK) {
731 case NFS4_SHARE_WANT_NO_PREFERENCE:
732 case NFS4_SHARE_WANT_READ_DELEG:
733 case NFS4_SHARE_WANT_WRITE_DELEG:
734 case NFS4_SHARE_WANT_ANY_DELEG:
735 case NFS4_SHARE_WANT_NO_DELEG:
736 case NFS4_SHARE_WANT_CANCEL:
737 break;
738 default:
739 return nfserr_bad_xdr;
740 }
92bac8c5 741 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 742 if (!w)
743 return nfs_ok;
2c8bd7e0
BH		 744
745 if (!deleg_when) /* open_downgrade */
746 return nfserr_inval;
04f9e664
BF		 747 switch (w) {
748 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
749 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 750 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
751 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 752 return nfs_ok;
753 }
754xdr_error:
755 return nfserr_bad_xdr;
756}
757
758static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
759{
760 __be32 *p;
761
762 READ_BUF(4);
763 READ32(*x);
764 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 765 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 766 return nfserr_bad_xdr;
767 return nfs_ok;
768xdr_error:
769 return nfserr_bad_xdr;
770}
771
a084daf5
BF		 772static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
773{
774 __be32 *p;
775
776 READ_BUF(4);
777 READ32(o->len);
778
779 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
780 return nfserr_bad_xdr;
781
782 READ_BUF(o->len);
783 SAVEMEM(o->data, o->len);
784 return nfs_ok;
785xdr_error:
786 return nfserr_bad_xdr;
787}
788
b37ad28b 789static __be32
1da177e4
LT		 790nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
791{
792 DECODE_HEAD;
2c8bd7e0 793 u32 dummy;
1da177e4
LT		 794
795 memset(open->op_bmval, 0, sizeof(open->op_bmval));
796 open->op_iattr.ia_valid = 0;
fe0750e5 797 open->op_openowner = NULL;
1da177e4
LT		 798
799 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 800 READ_BUF(4);
1da177e4 801 READ32(open->op_seqid);
2c8bd7e0
BH		 802 /* decode, yet ignore deleg_when until supported */
803 status = nfsd4_decode_share_access(argp, &open->op_share_access,
804 &open->op_deleg_want, &dummy);
04f9e664
BF		 805 if (status)
806 goto xdr_error;
807 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
808 if (status)
809 goto xdr_error;
a084daf5 810 READ_BUF(sizeof(clientid_t));
1da177e4 811 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 812 status = nfsd4_decode_opaque(argp, &open->op_owner);
813 if (status)
814 goto xdr_error;
815 READ_BUF(4);
1da177e4
LT		 816 READ32(open->op_create);
817 switch (open->op_create) {
818 case NFS4_OPEN_NOCREATE:
819 break;
820 case NFS4_OPEN_CREATE:
821 READ_BUF(4);
822 READ32(open->op_createmode);
823 switch (open->op_createmode) {
824 case NFS4_CREATE_UNCHECKED:
825 case NFS4_CREATE_GUARDED:
c0d6fc8a 826 status = nfsd4_decode_fattr(argp, open->op_bmval,
3c8e0316 827 &open->op_iattr, &open->op_acl);
c0d6fc8a 828 if (status)
1da177e4
LT		 829 goto out;
830 break;
831 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 832 READ_BUF(NFS4_VERIFIER_SIZE);
833 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 834 break;
79fb54ab
BH		 835 case NFS4_CREATE_EXCLUSIVE4_1:
836 if (argp->minorversion < 1)
837 goto xdr_error;
ab4684d1
CL		 838 READ_BUF(NFS4_VERIFIER_SIZE);
839 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 840 status = nfsd4_decode_fattr(argp, open->op_bmval,
3c8e0316 841 &open->op_iattr, &open->op_acl);
79fb54ab
BH		 842 if (status)
843 goto out;
844 break;
1da177e4
LT		 845 default:
846 goto xdr_error;
847 }
848 break;
849 default:
850 goto xdr_error;
851 }
852
853 /* open_claim */
854 READ_BUF(4);
855 READ32(open->op_claim_type);
856 switch (open->op_claim_type) {
857 case NFS4_OPEN_CLAIM_NULL:
858 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
859 READ_BUF(4);
860 READ32(open->op_fname.len);
861 READ_BUF(open->op_fname.len);
862 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 863 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 864 return status;
865 break;
866 case NFS4_OPEN_CLAIM_PREVIOUS:
867 READ_BUF(4);
868 READ32(open->op_delegate_type);
869 break;
870 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 871 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
872 if (status)
873 return status;
874 READ_BUF(4);
1da177e4
LT		 875 READ32(open->op_fname.len);
876 READ_BUF(open->op_fname.len);
877 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 878 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 879 return status;
880 break;
8b289b2c
BF		 881 case NFS4_OPEN_CLAIM_FH:
882 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
883 if (argp->minorversion < 1)
884 goto xdr_error;
885 /* void */
886 break;
887 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
888 if (argp->minorversion < 1)
889 goto xdr_error;
890 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
891 if (status)
892 return status;
893 break;
1da177e4
LT		 894 default:
895 goto xdr_error;
896 }
897
898 DECODE_TAIL;
899}
900
b37ad28b 901static __be32
1da177e4
LT		 902nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
903{
904 DECODE_HEAD;
905
e31a1b66
BH		 906 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
907 if (status)
908 return status;
909 READ_BUF(4);
1da177e4
LT		 910 READ32(open_conf->oc_seqid);
911
912 DECODE_TAIL;
913}
914
b37ad28b 915static __be32
1da177e4
LT		 916nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
917{
918 DECODE_HEAD;
919
e31a1b66
BH		 920 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
921 if (status)
922 return status;
04f9e664 923 READ_BUF(4);
1da177e4 924 READ32(open_down->od_seqid);
2c8bd7e0
BH		 925 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
926 &open_down->od_deleg_want, NULL);
04f9e664
BF		 927 if (status)
928 return status;
929 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
930 if (status)
931 return status;
1da177e4
LT		 932 DECODE_TAIL;
933}
934
b37ad28b 935static __be32
1da177e4
LT		 936nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
937{
938 DECODE_HEAD;
939
940 READ_BUF(4);
941 READ32(putfh->pf_fhlen);
942 if (putfh->pf_fhlen > NFS4_FHSIZE)
943 goto xdr_error;
944 READ_BUF(putfh->pf_fhlen);
945 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
946
947 DECODE_TAIL;
948}
949
b37ad28b 950static __be32
1da177e4
LT		 951nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
952{
953 DECODE_HEAD;
954
e31a1b66
BH		 955 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
956 if (status)
957 return status;
958 READ_BUF(12);
1da177e4
LT		 959 READ64(read->rd_offset);
960 READ32(read->rd_length);
961
962 DECODE_TAIL;
963}
964
b37ad28b 965static __be32
1da177e4
LT		 966nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
967{
968 DECODE_HEAD;
969
970 READ_BUF(24);
971 READ64(readdir->rd_cookie);
972 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
973 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
974 READ32(readdir->rd_maxcount);
975 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
976 goto out;
977
978 DECODE_TAIL;
979}
980
b37ad28b 981static __be32
1da177e4
LT		 982nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
983{
984 DECODE_HEAD;
985
986 READ_BUF(4);
987 READ32(remove->rm_namelen);
988 READ_BUF(remove->rm_namelen);
989 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 990 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 991 return status;
992
993 DECODE_TAIL;
994}
995
b37ad28b 996static __be32
1da177e4
LT		 997nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
998{
999 DECODE_HEAD;
1000
1001 READ_BUF(4);
1002 READ32(rename->rn_snamelen);
1003 READ_BUF(rename->rn_snamelen + 4);
1004 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1005 READ32(rename->rn_tnamelen);
1006 READ_BUF(rename->rn_tnamelen);
1007 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1008 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1009 return status;
a36b1725 1010 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1011 return status;
1012
1013 DECODE_TAIL;
1014}
1015
b37ad28b 1016static __be32
1da177e4
LT		 1017nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1018{
1019 DECODE_HEAD;
1020
1021 READ_BUF(sizeof(clientid_t));
1022 COPYMEM(clientid, sizeof(clientid_t));
1023
1024 DECODE_TAIL;
1025}
1026
dcb488a3
AA		 1027static __be32
1028nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1029 struct nfsd4_secinfo *secinfo)
1030{
1031 DECODE_HEAD;
1032
1033 READ_BUF(4);
1034 READ32(secinfo->si_namelen);
1035 READ_BUF(secinfo->si_namelen);
1036 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1037 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1038 if (status)
1039 return status;
1040 DECODE_TAIL;
1041}
1042
04f4ad16
BF		 1043static __be32
1044nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1045 struct nfsd4_secinfo_no_name *sin)
1046{
1047 DECODE_HEAD;
1048
1049 READ_BUF(4);
1050 READ32(sin->sin_style);
1051 DECODE_TAIL;
1052}
1053
b37ad28b 1054static __be32
1da177e4
LT		 1055nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1056{
e31a1b66 1057 __be32 status;
1da177e4 1058
e31a1b66
BH		 1059 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1060 if (status)
1061 return status;
3c8e0316
YZ		 1062 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1063 &setattr->sa_acl);
1da177e4
LT		 1064}
1065
b37ad28b 1066static __be32
1da177e4
LT		 1067nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1068{
1069 DECODE_HEAD;
1070
ab4684d1
CL		 1071 READ_BUF(NFS4_VERIFIER_SIZE);
1072 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1073
a084daf5
BF		 1074 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1075 if (status)
1076 return nfserr_bad_xdr;
1077 READ_BUF(8);
1da177e4
LT		 1078 READ32(setclientid->se_callback_prog);
1079 READ32(setclientid->se_callback_netid_len);
1080
1081 READ_BUF(setclientid->se_callback_netid_len + 4);
1082 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1083 READ32(setclientid->se_callback_addr_len);
1084
1085 READ_BUF(setclientid->se_callback_addr_len + 4);
1086 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1087 READ32(setclientid->se_callback_ident);
1088
1089 DECODE_TAIL;
1090}
1091
b37ad28b 1092static __be32
1da177e4
LT		 1093nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1094{
1095 DECODE_HEAD;
1096
ab4684d1 1097 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1098 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1099 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1100
1101 DECODE_TAIL;
1102}
1103
1104/* Also used for NVERIFY */
b37ad28b 1105static __be32
1da177e4
LT		 1106nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1107{
1108#if 0
1109 struct nfsd4_compoundargs save = {
1110 .p = argp->p,
1111 .end = argp->end,
1112 .rqstp = argp->rqstp,
1113 };
1114 u32 ve_bmval[2];
1115 struct iattr ve_iattr; /* request */
1116 struct nfs4_acl *ve_acl; /* request */
1117#endif
1118 DECODE_HEAD;
1119
1120 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1121 goto out;
1122
1123 /* For convenience's sake, we compare raw xdr'd attributes in
1124 * nfsd4_proc_verify; however we still decode here just to return
1125 * correct error in case of bad xdr. */
1126#if 0
1127 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
1128 if (status == nfserr_inval) {
1129 status = nfserrno(status);
1130 goto out;
1131 }
1132#endif
1133 READ_BUF(4);
1134 READ32(verify->ve_attrlen);
1135 READ_BUF(verify->ve_attrlen);
1136 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1137
1138 DECODE_TAIL;
1139}
1140
b37ad28b 1141static __be32
1da177e4
LT		 1142nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1143{
1144 int avail;
1da177e4
LT		 1145 int len;
1146 DECODE_HEAD;
1147
e31a1b66
BH		 1148 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1149 if (status)
1150 return status;
1151 READ_BUF(16);
1da177e4
LT		 1152 READ64(write->wr_offset);
1153 READ32(write->wr_stable_how);
1154 if (write->wr_stable_how > 2)
1155 goto xdr_error;
1156 READ32(write->wr_buflen);
1157
1158 /* Sorry .. no magic macros for this.. *
1159 * READ_BUF(write->wr_buflen);
1160 * SAVEMEM(write->wr_buf, write->wr_buflen);
1161 */
1162 avail = (char*)argp->end - (char*)argp->p;
1163 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1164 dprintk("NFSD: xdr error (%s:%d)\n",
1165 __FILE__, __LINE__);
1da177e4
LT		 1166 goto xdr_error;
1167 }
70cc7f75
BF		 1168 write->wr_head.iov_base = p;
1169 write->wr_head.iov_len = avail;
5a80a54d 1170 WARN_ON(avail != (XDR_QUADLEN(avail) << 2));
70cc7f75 1171 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1172
1173 len = XDR_QUADLEN(write->wr_buflen) << 2;
1174 if (len >= avail) {
1175 int pages;
1176
1177 len -= avail;
1178
1179 pages = len >> PAGE_SHIFT;
1180 argp->pagelist += pages;
1181 argp->pagelen -= pages * PAGE_SIZE;
1182 len -= pages * PAGE_SIZE;
1183
1184 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1185 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1186 }
5a80a54d 1187 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1188
1189 DECODE_TAIL;
1190}
1191
b37ad28b 1192static __be32
1da177e4
LT		 1193nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1194{
1195 DECODE_HEAD;
1196
1197 READ_BUF(12);
1198 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1199 READ32(rlockowner->rl_owner.len);
1200 READ_BUF(rlockowner->rl_owner.len);
1201 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1202
60adfc50
AA		 1203 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1204 return nfserr_inval;
1da177e4
LT		 1205 DECODE_TAIL;
1206}
1207
2db134eb
AA		 1208static __be32
1209nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1210 struct nfsd4_exchange_id *exid)
2db134eb 1211{
5afa040b 1212 int dummy, tmp;
0733d213
AA		 1213 DECODE_HEAD;
1214
1215 READ_BUF(NFS4_VERIFIER_SIZE);
1216 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1217
a084daf5
BF		 1218 status = nfsd4_decode_opaque(argp, &exid->clname);
1219 if (status)
1220 return nfserr_bad_xdr;
0733d213
AA		 1221
1222 READ_BUF(4);
1223 READ32(exid->flags);
1224
1225 /* Ignore state_protect4_a */
1226 READ_BUF(4);
1227 READ32(exid->spa_how);
1228 switch (exid->spa_how) {
1229 case SP4_NONE:
1230 break;
1231 case SP4_MACH_CRED:
1232 /* spo_must_enforce */
1233 READ_BUF(4);
1234 READ32(dummy);
1235 READ_BUF(dummy * 4);
1236 p += dummy;
1237
1238 /* spo_must_allow */
1239 READ_BUF(4);
1240 READ32(dummy);
1241 READ_BUF(dummy * 4);
1242 p += dummy;
1243 break;
1244 case SP4_SSV:
1245 /* ssp_ops */
1246 READ_BUF(4);
1247 READ32(dummy);
1248 READ_BUF(dummy * 4);
1249 p += dummy;
1250
1251 READ_BUF(4);
1252 READ32(dummy);
1253 READ_BUF(dummy * 4);
1254 p += dummy;
1255
1256 /* ssp_hash_algs<> */
1257 READ_BUF(4);
5afa040b
MJ		 1258 READ32(tmp);
1259 while (tmp--) {
1260 READ_BUF(4);
1261 READ32(dummy);
1262 READ_BUF(dummy);
1263 p += XDR_QUADLEN(dummy);
1264 }
0733d213
AA		 1265
1266 /* ssp_encr_algs<> */
1267 READ_BUF(4);
5afa040b
MJ		 1268 READ32(tmp);
1269 while (tmp--) {
1270 READ_BUF(4);
1271 READ32(dummy);
1272 READ_BUF(dummy);
1273 p += XDR_QUADLEN(dummy);
1274 }
0733d213
AA		 1275
1276 /* ssp_window and ssp_num_gss_handles */
1277 READ_BUF(8);
1278 READ32(dummy);
1279 READ32(dummy);
1280 break;
1281 default:
1282 goto xdr_error;
1283 }
1284
1285 /* Ignore Implementation ID */
1286 READ_BUF(4); /* nfs_impl_id4 array length */
1287 READ32(dummy);
1288
1289 if (dummy > 1)
1290 goto xdr_error;
1291
1292 if (dummy == 1) {
1293 /* nii_domain */
1294 READ_BUF(4);
1295 READ32(dummy);
1296 READ_BUF(dummy);
1297 p += XDR_QUADLEN(dummy);
1298
1299 /* nii_name */
1300 READ_BUF(4);
1301 READ32(dummy);
1302 READ_BUF(dummy);
1303 p += XDR_QUADLEN(dummy);
1304
1305 /* nii_date */
1306 READ_BUF(12);
1307 p += 3;
1308 }
1309 DECODE_TAIL;
2db134eb
AA		 1310}
1311
1312static __be32
1313nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1314 struct nfsd4_create_session *sess)
1315{
ec6b5d7b 1316 DECODE_HEAD;
ec6b5d7b 1317 u32 dummy;
ec6b5d7b
AA		 1318
1319 READ_BUF(16);
1320 COPYMEM(&sess->clientid, 8);
1321 READ32(sess->seqid);
1322 READ32(sess->flags);
1323
1324 /* Fore channel attrs */
1325 READ_BUF(28);
1326 READ32(dummy); /* headerpadsz is always 0 */
1327 READ32(sess->fore_channel.maxreq_sz);
1328 READ32(sess->fore_channel.maxresp_sz);
1329 READ32(sess->fore_channel.maxresp_cached);
1330 READ32(sess->fore_channel.maxops);
1331 READ32(sess->fore_channel.maxreqs);
1332 READ32(sess->fore_channel.nr_rdma_attrs);
1333 if (sess->fore_channel.nr_rdma_attrs == 1) {
1334 READ_BUF(4);
1335 READ32(sess->fore_channel.rdma_attrs);
1336 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1337 dprintk("Too many fore channel attr bitmaps!\n");
1338 goto xdr_error;
1339 }
1340
1341 /* Back channel attrs */
1342 READ_BUF(28);
1343 READ32(dummy); /* headerpadsz is always 0 */
1344 READ32(sess->back_channel.maxreq_sz);
1345 READ32(sess->back_channel.maxresp_sz);
1346 READ32(sess->back_channel.maxresp_cached);
1347 READ32(sess->back_channel.maxops);
1348 READ32(sess->back_channel.maxreqs);
1349 READ32(sess->back_channel.nr_rdma_attrs);
1350 if (sess->back_channel.nr_rdma_attrs == 1) {
1351 READ_BUF(4);
1352 READ32(sess->back_channel.rdma_attrs);
1353 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1354 dprintk("Too many back channel attr bitmaps!\n");
1355 goto xdr_error;
1356 }
1357
acb2887e 1358 READ_BUF(4);
ec6b5d7b 1359 READ32(sess->callback_prog);
acb2887e 1360 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1361 DECODE_TAIL;
2db134eb
AA		 1362}
1363
1364static __be32
1365nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1366 struct nfsd4_destroy_session *destroy_session)
1367{
e10e0cfc
BH		 1368 DECODE_HEAD;
1369 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1370 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1371
1372 DECODE_TAIL;
2db134eb
AA		 1373}
1374
e1ca12df
BS		 1375static __be32
1376nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1377 struct nfsd4_free_stateid *free_stateid)
1378{
1379 DECODE_HEAD;
1380
1381 READ_BUF(sizeof(stateid_t));
1382 READ32(free_stateid->fr_stateid.si_generation);
1383 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1384
1385 DECODE_TAIL;
1386}
1387
2db134eb
AA		 1388static __be32
1389nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1390 struct nfsd4_sequence *seq)
1391{
b85d4c01
BH		 1392 DECODE_HEAD;
1393
1394 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1395 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1396 READ32(seq->seqid);
1397 READ32(seq->slotid);
1398 READ32(seq->maxslots);
1399 READ32(seq->cachethis);
1400
1401 DECODE_TAIL;
2db134eb
AA		 1402}
1403
17456804
BS		 1404static __be32
1405nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1406{
17456804 1407 int i;
03cfb420
BS		 1408 __be32 *p, status;
1409 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1410
1411 READ_BUF(4);
1412 test_stateid->ts_num_ids = ntohl(*p++);
1413
03cfb420 1414 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1415
1416 for (i = 0; i < test_stateid->ts_num_ids; i++) {
03cfb420
BS		 1417 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1418 if (!stateid) {
afcf6792 1419 status = nfserrno(-ENOMEM);
03cfb420
BS		 1420 goto out;
1421 }
1422
1423 defer_free(argp, kfree, stateid);
1424 INIT_LIST_HEAD(&stateid->ts_id_list);
1425 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1426
1427 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1428 if (status)
03cfb420 1429 goto out;
17456804
BS		 1430 }
1431
1432 status = 0;
1433out:
1434 return status;
1435xdr_error:
1436 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1437 status = nfserr_bad_xdr;
1438 goto out;
1439}
1440
345c2842
MJ		 1441static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1442{
1443 DECODE_HEAD;
1444
1445 READ_BUF(8);
1446 COPYMEM(&dc->clientid, 8);
1447
1448 DECODE_TAIL;
1449}
1450
4dc6ec00
BF		 1451static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1452{
1453 DECODE_HEAD;
1454
1455 READ_BUF(4);
1456 READ32(rc->rca_one_fs);
1457
1458 DECODE_TAIL;
1459}
1460
347e0ad9
BH		 1461static __be32
1462nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1463{
1464 return nfs_ok;
1465}
1466
3c375c6f
BH		 1467static __be32
1468nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1469{
1e685ec2 1470 return nfserr_notsupp;
3c375c6f
BH		 1471}
1472
347e0ad9
BH		 1473typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1474
1475static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1476 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1477 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1478 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1479 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1480 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1481 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1482 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1483 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1484 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1485 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1486 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1487 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1488 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1489 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1490 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1491 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1492 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1493 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1494 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1495 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
a1c8c4d1 1496 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
ad1060c8
BF		 1497 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1498 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1499 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1500 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1501 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1502 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1503 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1504 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1505 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1506 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1507 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1508 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1509 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1510 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1511 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1512 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
347e0ad9
BH		 1513};
1514
2db134eb 1515static nfsd4_dec nfsd41_dec_ops[] = {
9064caae
RD		 1516 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1517 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1518 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1519 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1520 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1521 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1522 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1523 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1524 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1525 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1526 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1527 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1528 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1529 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1530 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1531 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1532 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1533 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1534 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1535 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1536 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1537 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1538 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1539 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1540 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1541 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1542 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1543 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1544 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1545 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1546 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1547 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1548 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1549 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1550 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1551 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1552 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
2db134eb
AA		 1553
1554 /* new operations for NFSv4.1 */
cb73a9f4 1555 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1556 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1557 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1558 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1559 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1560 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1561 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1562 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1563 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1564 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1565 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1566 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1567 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1568 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1569 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1570 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1571 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1572 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1573 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1574};
1575
f2feb96b
BH		 1576struct nfsd4_minorversion_ops {
1577 nfsd4_dec *decoders;
1578 int nops;
1579};
1580
1581static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
ad1060c8 1582 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
2db134eb 1583 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
f2feb96b
BH		 1584};
1585
b37ad28b 1586static __be32
1da177e4
LT		 1587nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1588{
1589 DECODE_HEAD;
1590 struct nfsd4_op *op;
f2feb96b 1591 struct nfsd4_minorversion_ops *ops;
1091006c 1592 bool cachethis = false;
1da177e4
LT		 1593 int i;
1594
1da177e4
LT		 1595 READ_BUF(4);
1596 READ32(argp->taglen);
1597 READ_BUF(argp->taglen + 8);
1598 SAVEMEM(argp->tag, argp->taglen);
1599 READ32(argp->minorversion);
1600 READ32(argp->opcnt);
1601
1602 if (argp->taglen > NFSD4_MAX_TAGLEN)
1603 goto xdr_error;
1604 if (argp->opcnt > 100)
1605 goto xdr_error;
1606
e8c96f8c 1607 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1608 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1609 if (!argp->ops) {
1610 argp->ops = argp->iops;
817cb9d4 1611 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1612 goto xdr_error;
1613 }
1614 }
1615
f2feb96b 1616 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
30cff1ff
BH		 1617 argp->opcnt = 0;
1618
f2feb96b 1619 ops = &nfsd4_minorversion[argp->minorversion];
1da177e4
LT		 1620 for (i = 0; i < argp->opcnt; i++) {
1621 op = &argp->ops[i];
1622 op->replay = NULL;
1623
8a61b18c
BF		 1624 READ_BUF(4);
1625 READ32(op->opnum);
1da177e4 1626
de3cab79 1627 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
f2feb96b 1628 op->status = ops->decoders[op->opnum](argp, &op->u);
347e0ad9 1629 else {
1da177e4
LT		 1630 op->opnum = OP_ILLEGAL;
1631 op->status = nfserr_op_illegal;
1da177e4
LT		 1632 }
1633
1634 if (op->status) {
1635 argp->opcnt = i+1;
1636 break;
1637 }
1091006c
BF		 1638 /*
1639 * We'll try to cache the result in the DRC if any one
1640 * op in the compound wants to be cached:
1641 */
1642 cachethis |= nfsd4_cache_this_op(op);
1da177e4 1643 }
1091006c
BF		 1644 /* Sessions make the DRC unnecessary: */
1645 if (argp->minorversion)
1646 cachethis = false;
1647 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4
LT		 1648
1649 DECODE_TAIL;
1650}
1da177e4 1651
1da177e4
LT		 1652#define WRITE32(n) *p++ = htonl(n)
1653#define WRITE64(n) do { \
1654 *p++ = htonl((u32)((n) >> 32)); \
1655 *p++ = htonl((u32)(n)); \
1656} while (0)
5108b276 1657#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1658 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1659 memcpy(p, ptr, nbytes); \
1660 p += XDR_QUADLEN(nbytes); \
5108b276 1661}} while (0)
c654b8a9
BF		 1662
1663static void write32(__be32 **p, u32 n)
1664{
45eaa1c1 1665 *(*p)++ = htonl(n);
c654b8a9
BF		 1666}
1667
1668static void write64(__be32 **p, u64 n)
1669{
45eaa1c1 1670 write32(p, (n >> 32));
c654b8a9
BF		 1671 write32(p, (u32)n);
1672}
1673
1674static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1675{
1676 if (IS_I_VERSION(inode)) {
1677 write64(p, inode->i_version);
1678 } else {
1679 write32(p, stat->ctime.tv_sec);
1680 write32(p, stat->ctime.tv_nsec);
1681 }
1682}
1683
1684static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1685{
1686 write32(p, c->atomic);
1687 if (c->change_supported) {
1688 write64(p, c->before_change);
1689 write64(p, c->after_change);
1690 } else {
1691 write32(p, c->before_ctime_sec);
1692 write32(p, c->before_ctime_nsec);
1693 write32(p, c->after_ctime_sec);
1694 write32(p, c->after_ctime_nsec);
1695 }
1696}
1da177e4
LT		 1697
1698#define RESERVE_SPACE(nbytes) do { \
1699 p = resp->p; \
1700 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1701} while (0)
1702#define ADJUST_ARGS() resp->p = p
1703
1704/*
1705 * Header routine to setup seqid operation replay cache
1706 */
1707#define ENCODE_SEQID_OP_HEAD \
2ebbc012 1708 __be32 *save; \
1da177e4
LT		 1709 \
1710 save = resp->p;
1711
1712/*
7fb64cee
N		 1713 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1714 * is where sequence id's are incremented, and the replay cache is filled.
1715 * Note that we increment sequence id's here, at the last moment, so we're sure
1716 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1717 */
1718
f3e42237
BF		 1719static void encode_seqid_op_tail(struct nfsd4_compoundres *resp, __be32 *save, __be32 nfserr)
1720{
1721 struct nfs4_stateowner *stateowner = resp->cstate.replay_owner;
1722
1723 if (seqid_mutating_err(ntohl(nfserr)) && stateowner) {
1724 stateowner->so_seqid++;
1725 stateowner->so_replay.rp_status = nfserr;
1726 stateowner->so_replay.rp_buflen =
1727 (char *)resp->p - (char *)save;
1728 memcpy(stateowner->so_replay.rp_buf, save,
1729 stateowner->so_replay.rp_buflen);
38c387b5 1730 nfsd4_purge_closed_stateid(stateowner);
f3e42237
BF		 1731 }
1732}
1da177e4 1733
81c3f413 1734/* Encode as an array of strings the string given with components
e7a0444a 1735 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1736 */
e7a0444a
WAA		 1737static __be32 nfsd4_encode_components_esc(char sep, char *components,
1738 __be32 **pp, int *buflen,
1739 char esc_enter, char esc_exit)
81c3f413 1740{
2ebbc012
AV		 1741 __be32 *p = *pp;
1742 __be32 *countp = p;
81c3f413 1743 int strlen, count=0;
e7a0444a 1744 char *str, *end, *next;
81c3f413
BF		 1745
1746 dprintk("nfsd4_encode_components(%s)\n", components);
1747 if ((*buflen -= 4) < 0)
1748 return nfserr_resource;
1749 WRITE32(0); /* We will fill this in with @count later */
1750 end = str = components;
1751 while (*end) {
e7a0444a
WAA		 1752 bool found_esc = false;
1753
1754 /* try to parse as esc_start, ..., esc_end, sep */
1755 if (*str == esc_enter) {
1756 for (; *end && (*end != esc_exit); end++)
1757 /* find esc_exit or end of string */;
1758 next = end + 1;
1759 if (*end && (!*next || *next == sep)) {
1760 str++;
1761 found_esc = true;
1762 }
1763 }
1764
1765 if (!found_esc)
1766 for (; *end && (*end != sep); end++)
1767 /* find sep or end of string */;
1768
81c3f413
BF		 1769 strlen = end - str;
1770 if (strlen) {
1771 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1772 return nfserr_resource;
1773 WRITE32(strlen);
1774 WRITEMEM(str, strlen);
1775 count++;
1776 }
1777 else
1778 end++;
1779 str = end;
1780 }
1781 *pp = p;
1782 p = countp;
1783 WRITE32(count);
1784 return 0;
1785}
1786
e7a0444a
WAA		 1787/* Encode as an array of strings the string given with components
1788 * separated @sep.
1789 */
1790static __be32 nfsd4_encode_components(char sep, char *components,
1791 __be32 **pp, int *buflen)
1792{
1793 return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
1794}
1795
81c3f413
BF		 1796/*
1797 * encode a location element of a fs_locations structure
1798 */
b37ad28b 1799static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1800 __be32 **pp, int *buflen)
81c3f413 1801{
b37ad28b 1802 __be32 status;
2ebbc012 1803 __be32 *p = *pp;
81c3f413 1804
e7a0444a
WAA		 1805 status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
1806 '[', ']');
81c3f413
BF		 1807 if (status)
1808 return status;
1809 status = nfsd4_encode_components('/', location->path, &p, buflen);
1810 if (status)
1811 return status;
1812 *pp = p;
1813 return 0;
1814}
1815
1816/*
ed748aac 1817 * Encode a path in RFC3530 'pathname4' format
81c3f413 1818 */
ed748aac
TM		 1819static __be32 nfsd4_encode_path(const struct path *root,
1820 const struct path *path, __be32 **pp, int *buflen)
81c3f413 1821{
ed748aac
TM		 1822 struct path cur = {
1823 .mnt = path->mnt,
1824 .dentry = path->dentry,
1825 };
1826 __be32 *p = *pp;
1827 struct dentry **components = NULL;
1828 unsigned int ncomponents = 0;
1829 __be32 err = nfserr_jukebox;
81c3f413 1830
ed748aac 1831 dprintk("nfsd4_encode_components(");
81c3f413 1832
ed748aac
TM		 1833 path_get(&cur);
1834 /* First walk the path up to the nfsd root, and store the
1835 * dentries/path components in an array.
1836 */
1837 for (;;) {
1838 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1839 break;
1840 if (cur.dentry == cur.mnt->mnt_root) {
1841 if (follow_up(&cur))
1842 continue;
1843 goto out_free;
1844 }
1845 if ((ncomponents & 15) == 0) {
1846 struct dentry **new;
1847 new = krealloc(components,
1848 sizeof(*new) * (ncomponents + 16),
1849 GFP_KERNEL);
1850 if (!new)
1851 goto out_free;
1852 components = new;
1853 }
1854 components[ncomponents++] = cur.dentry;
1855 cur.dentry = dget_parent(cur.dentry);
1856 }
81c3f413 1857
ed748aac
TM		 1858 *buflen -= 4;
1859 if (*buflen < 0)
1860 goto out_free;
1861 WRITE32(ncomponents);
1862
1863 while (ncomponents) {
1864 struct dentry *dentry = components[ncomponents - 1];
1865 unsigned int len = dentry->d_name.len;
1866
1867 *buflen -= 4 + (XDR_QUADLEN(len) << 2);
1868 if (*buflen < 0)
1869 goto out_free;
1870 WRITE32(len);
1871 WRITEMEM(dentry->d_name.name, len);
1872 dprintk("/%s", dentry->d_name.name);
1873 dput(dentry);
1874 ncomponents--;
81c3f413 1875 }
ed748aac
TM		 1876
1877 *pp = p;
1878 err = 0;
1879out_free:
1880 dprintk(")\n");
1881 while (ncomponents)
1882 dput(components[--ncomponents]);
1883 kfree(components);
1884 path_put(&cur);
1885 return err;
1886}
1887
1888static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
1889 const struct path *path, __be32 **pp, int *buflen)
1890{
1891 struct svc_export *exp_ps;
1892 __be32 res;
1893
1894 exp_ps = rqst_find_fsidzero_export(rqstp);
1895 if (IS_ERR(exp_ps))
1896 return nfserrno(PTR_ERR(exp_ps));
1897 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
1898 exp_put(exp_ps);
1899 return res;
81c3f413
BF		 1900}
1901
1902/*
1903 * encode a fs_locations structure
1904 */
b37ad28b 1905static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1906 struct svc_export *exp,
2ebbc012 1907 __be32 **pp, int *buflen)
81c3f413 1908{
b37ad28b 1909 __be32 status;
cc45f017 1910 int i;
2ebbc012 1911 __be32 *p = *pp;
81c3f413 1912 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1913
ed748aac 1914 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
81c3f413
BF		 1915 if (status)
1916 return status;
1917 if ((*buflen -= 4) < 0)
1918 return nfserr_resource;
1919 WRITE32(fslocs->locations_count);
1920 for (i=0; i<fslocs->locations_count; i++) {
1921 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1922 &p, buflen);
1923 if (status)
1924 return status;
1925 }
1926 *pp = p;
1927 return 0;
1928}
1da177e4 1929
3d2544b1
BF		 1930static u32 nfs4_file_type(umode_t mode)
1931{
1932 switch (mode & S_IFMT) {
1933 case S_IFIFO: return NF4FIFO;
1934 case S_IFCHR: return NF4CHR;
1935 case S_IFDIR: return NF4DIR;
1936 case S_IFBLK: return NF4BLK;
1937 case S_IFLNK: return NF4LNK;
1938 case S_IFREG: return NF4REG;
1939 case S_IFSOCK: return NF4SOCK;
1940 default: return NF4BAD;
1941 };
1942}
1da177e4 1943
b37ad28b 1944static __be32
1da177e4 1945nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1946 __be32 **p, int *buflen)
1da177e4
LT		 1947{
1948 int status;
1949
1950 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1951 return nfserr_resource;
1952 if (whotype != NFS4_ACL_WHO_NAMED)
1953 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1954 else if (group)
1955 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1956 else
1957 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1958 if (status < 0)
1959 return nfserrno(status);
1960 *p = xdr_encode_opaque(*p, NULL, status);
1961 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1962 BUG_ON(*buflen < 0);
1963 return 0;
1964}
1965
b37ad28b 1966static inline __be32
2ebbc012 1967nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1da177e4
LT		 1968{
1969 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1970}
1971
b37ad28b 1972static inline __be32
2ebbc012 1973nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1da177e4
LT		 1974{
1975 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1976}
1977
b37ad28b 1978static inline __be32
1da177e4 1979nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1980 __be32 **p, int *buflen)
1da177e4
LT		 1981{
1982 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1983}
1984
42ca0993
BF		 1985#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1986 FATTR4_WORD0_RDATTR_ERROR)
1987#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1988
b37ad28b 1989static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1990{
1991 /* As per referral draft: */
1992 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1993 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1994 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1995 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1996 *rdattr_err = NFSERR_MOVED;
1997 else
1998 return nfserr_moved;
1999 }
2000 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2001 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2002 return 0;
2003}
1da177e4 2004
ae7095a7
BF		 2005
2006static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2007{
2008 struct path path = exp->ex_path;
2009 int err;
2010
2011 path_get(&path);
2012 while (follow_up(&path)) {
2013 if (path.dentry != path.mnt->mnt_root)
2014 break;
2015 }
2016 err = vfs_getattr(path.mnt, path.dentry, stat);
2017 path_put(&path);
2018 return err;
2019}
2020
1da177e4
LT		 2021/*
2022 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2023 * ourselves.
2024 *
2025 * @countp is the buffer size in _words_; upon successful return this becomes
2026 * replaced with the number of words written.
2027 */
b37ad28b 2028__be32
1da177e4 2029nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2ebbc012 2030 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
406a7ea9 2031 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2032{
2033 u32 bmval0 = bmval[0];
2034 u32 bmval1 = bmval[1];
7e705706 2035 u32 bmval2 = bmval[2];
1da177e4
LT		 2036 struct kstat stat;
2037 struct svc_fh tempfh;
2038 struct kstatfs statfs;
2039 int buflen = *countp << 2;
2ebbc012 2040 __be32 *attrlenp;
1da177e4
LT		 2041 u32 dummy;
2042 u64 dummy64;
42ca0993 2043 u32 rdattr_err = 0;
2ebbc012 2044 __be32 *p = buffer;
b37ad28b 2045 __be32 status;
b8dd7b9a 2046 int err;
1da177e4
LT		 2047 int aclsupport = 0;
2048 struct nfs4_acl *acl = NULL;
7e705706
AA		 2049 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2050 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2051 struct path path = {
2052 .mnt = exp->ex_path.mnt,
2053 .dentry = dentry,
2054 };
1da177e4
LT		 2055
2056 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2057 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2058 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2059 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2060
42ca0993 2061 if (exp->ex_fslocs.migrated) {
7e705706 2062 BUG_ON(bmval[2]);
42ca0993
BF		 2063 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2064 if (status)
2065 goto out;
2066 }
2067
54775491 2068 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
b8dd7b9a 2069 if (err)
1da177e4 2070 goto out_nfserr;
a16e92ed
BF		 2071 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2072 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2073 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2074 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2075 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2076 if (err)
1da177e4
LT		 2077 goto out_nfserr;
2078 }
2079 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2080 fh_init(&tempfh, NFS4_FHSIZE);
2081 status = fh_compose(&tempfh, exp, dentry, NULL);
2082 if (status)
2083 goto out;
2084 fhp = &tempfh;
2085 }
2086 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2087 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2088 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2089 aclsupport = (err == 0);
1da177e4 2090 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2091 if (err == -EOPNOTSUPP)
1da177e4 2092 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2093 else if (err == -EINVAL) {
1da177e4
LT		 2094 status = nfserr_attrnotsupp;
2095 goto out;
b8dd7b9a 2096 } else if (err != 0)
1da177e4
LT		 2097 goto out_nfserr;
2098 }
2099 }
1da177e4 2100
2b44f1ba
BH		 2101 if (bmval2) {
2102 if ((buflen -= 16) < 0)
2103 goto out_resource;
7e705706
AA		 2104 WRITE32(3);
2105 WRITE32(bmval0);
2106 WRITE32(bmval1);
2107 WRITE32(bmval2);
2b44f1ba
BH		 2108 } else if (bmval1) {
2109 if ((buflen -= 12) < 0)
2110 goto out_resource;
7e705706
AA		 2111 WRITE32(2);
2112 WRITE32(bmval0);
2113 WRITE32(bmval1);
2114 } else {
2b44f1ba
BH		 2115 if ((buflen -= 8) < 0)
2116 goto out_resource;
7e705706
AA		 2117 WRITE32(1);
2118 WRITE32(bmval0);
2119 }
1da177e4
LT		 2120 attrlenp = p++; /* to be backfilled later */
2121
2122 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2123 u32 word0 = nfsd_suppattrs0(minorversion);
2124 u32 word1 = nfsd_suppattrs1(minorversion);
2125 u32 word2 = nfsd_suppattrs2(minorversion);
2126
42ca0993
BF		 2127 if (!aclsupport)
2128 word0 &= ~FATTR4_WORD0_ACL;
7e705706 2129 if (!word2) {
2b44f1ba
BH		 2130 if ((buflen -= 12) < 0)
2131 goto out_resource;
7e705706
AA		 2132 WRITE32(2);
2133 WRITE32(word0);
2134 WRITE32(word1);
2135 } else {
2b44f1ba
BH		 2136 if ((buflen -= 16) < 0)
2137 goto out_resource;
7e705706
AA		 2138 WRITE32(3);
2139 WRITE32(word0);
2140 WRITE32(word1);
2141 WRITE32(word2);
2142 }
1da177e4
LT		 2143 }
2144 if (bmval0 & FATTR4_WORD0_TYPE) {
2145 if ((buflen -= 4) < 0)
2146 goto out_resource;
3d2544b1 2147 dummy = nfs4_file_type(stat.mode);
1da177e4
LT		 2148 if (dummy == NF4BAD)
2149 goto out_serverfault;
2150 WRITE32(dummy);
2151 }
2152 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2153 if ((buflen -= 4) < 0)
2154 goto out_resource;
49640001 2155 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 2156 WRITE32(NFS4_FH_PERSISTENT);
49640001 2157 else
e34ac862 2158 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 2159 }
2160 if (bmval0 & FATTR4_WORD0_CHANGE) {
1da177e4
LT		 2161 if ((buflen -= 8) < 0)
2162 goto out_resource;
c654b8a9 2163 write_change(&p, &stat, dentry->d_inode);
1da177e4
LT		 2164 }
2165 if (bmval0 & FATTR4_WORD0_SIZE) {
2166 if ((buflen -= 8) < 0)
2167 goto out_resource;
2168 WRITE64(stat.size);
2169 }
2170 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2171 if ((buflen -= 4) < 0)
2172 goto out_resource;
2173 WRITE32(1);
2174 }
2175 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2176 if ((buflen -= 4) < 0)
2177 goto out_resource;
2178 WRITE32(1);
2179 }
2180 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2181 if ((buflen -= 4) < 0)
2182 goto out_resource;
2183 WRITE32(0);
2184 }
2185 if (bmval0 & FATTR4_WORD0_FSID) {
2186 if ((buflen -= 16) < 0)
2187 goto out_resource;
42ca0993
BF		 2188 if (exp->ex_fslocs.migrated) {
2189 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2190 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2191 } else switch(fsid_source(fhp)) {
2192 case FSIDSOURCE_FSID:
1da177e4
LT		 2193 WRITE64((u64)exp->ex_fsid);
2194 WRITE64((u64)0);
af6a4e28
N		 2195 break;
2196 case FSIDSOURCE_DEV:
1da177e4
LT		 2197 WRITE32(0);
2198 WRITE32(MAJOR(stat.dev));
2199 WRITE32(0);
2200 WRITE32(MINOR(stat.dev));
af6a4e28
N		 2201 break;
2202 case FSIDSOURCE_UUID:
2203 WRITEMEM(exp->ex_uuid, 16);
2204 break;
1da177e4
LT		 2205 }
2206 }
2207 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2208 if ((buflen -= 4) < 0)
2209 goto out_resource;
2210 WRITE32(0);
2211 }
2212 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2213 if ((buflen -= 4) < 0)
2214 goto out_resource;
cf07d2ea 2215 WRITE32(nfsd4_lease);
1da177e4
LT		 2216 }
2217 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2218 if ((buflen -= 4) < 0)
2219 goto out_resource;
42ca0993 2220 WRITE32(rdattr_err);
1da177e4
LT		 2221 }
2222 if (bmval0 & FATTR4_WORD0_ACL) {
2223 struct nfs4_ace *ace;
1da177e4
LT		 2224
2225 if (acl == NULL) {
2226 if ((buflen -= 4) < 0)
2227 goto out_resource;
2228
2229 WRITE32(0);
2230 goto out_acl;
2231 }
2232 if ((buflen -= 4) < 0)
2233 goto out_resource;
2234 WRITE32(acl->naces);
2235
28e05dd8 2236 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 2237 if ((buflen -= 4*3) < 0)
2238 goto out_resource;
2239 WRITE32(ace->type);
2240 WRITE32(ace->flag);
2241 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
2242 status = nfsd4_encode_aclname(rqstp, ace->whotype,
2243 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
2244 &p, &buflen);
2245 if (status == nfserr_resource)
2246 goto out_resource;
2247 if (status)
2248 goto out;
2249 }
2250 }
2251out_acl:
2252 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2253 if ((buflen -= 4) < 0)
2254 goto out_resource;
2255 WRITE32(aclsupport ?
2256 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2257 }
2258 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2259 if ((buflen -= 4) < 0)
2260 goto out_resource;
2261 WRITE32(1);
2262 }
2263 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2264 if ((buflen -= 4) < 0)
2265 goto out_resource;
2930d381 2266 WRITE32(0);
1da177e4
LT		 2267 }
2268 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2269 if ((buflen -= 4) < 0)
2270 goto out_resource;
2271 WRITE32(1);
2272 }
2273 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2274 if ((buflen -= 4) < 0)
2275 goto out_resource;
2276 WRITE32(1);
2277 }
2278 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2279 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2280 if (buflen < 0)
2281 goto out_resource;
2282 WRITE32(fhp->fh_handle.fh_size);
2283 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2284 }
2285 if (bmval0 & FATTR4_WORD0_FILEID) {
2286 if ((buflen -= 8) < 0)
2287 goto out_resource;
40ee5dc6 2288 WRITE64(stat.ino);
1da177e4
LT		 2289 }
2290 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2291 if ((buflen -= 8) < 0)
2292 goto out_resource;
2293 WRITE64((u64) statfs.f_ffree);
2294 }
2295 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2296 if ((buflen -= 8) < 0)
2297 goto out_resource;
2298 WRITE64((u64) statfs.f_ffree);
2299 }
2300 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2301 if ((buflen -= 8) < 0)
2302 goto out_resource;
2303 WRITE64((u64) statfs.f_files);
2304 }
81c3f413
BF		 2305 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2306 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2307 if (status == nfserr_resource)
2308 goto out_resource;
2309 if (status)
2310 goto out;
2311 }
1da177e4
LT		 2312 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2313 if ((buflen -= 4) < 0)
2314 goto out_resource;
2315 WRITE32(1);
2316 }
2317 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2318 if ((buflen -= 8) < 0)
2319 goto out_resource;
2320 WRITE64(~(u64)0);
2321 }
2322 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2323 if ((buflen -= 4) < 0)
2324 goto out_resource;
2325 WRITE32(255);
2326 }
2327 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2328 if ((buflen -= 4) < 0)
2329 goto out_resource;
a16e92ed 2330 WRITE32(statfs.f_namelen);
1da177e4
LT		 2331 }
2332 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2333 if ((buflen -= 8) < 0)
2334 goto out_resource;
7adae489 2335 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2336 }
2337 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2338 if ((buflen -= 8) < 0)
2339 goto out_resource;
7adae489 2340 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2341 }
2342 if (bmval1 & FATTR4_WORD1_MODE) {
2343 if ((buflen -= 4) < 0)
2344 goto out_resource;
2345 WRITE32(stat.mode & S_IALLUGO);
2346 }
2347 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2348 if ((buflen -= 4) < 0)
2349 goto out_resource;
2350 WRITE32(1);
2351 }
2352 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2353 if ((buflen -= 4) < 0)
2354 goto out_resource;
2355 WRITE32(stat.nlink);
2356 }
2357 if (bmval1 & FATTR4_WORD1_OWNER) {
2358 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2359 if (status == nfserr_resource)
2360 goto out_resource;
2361 if (status)
2362 goto out;
2363 }
2364 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2365 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2366 if (status == nfserr_resource)
2367 goto out_resource;
2368 if (status)
2369 goto out;
2370 }
2371 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2372 if ((buflen -= 8) < 0)
2373 goto out_resource;
2374 WRITE32((u32) MAJOR(stat.rdev));
2375 WRITE32((u32) MINOR(stat.rdev));
2376 }
2377 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2378 if ((buflen -= 8) < 0)
2379 goto out_resource;
2380 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2381 WRITE64(dummy64);
2382 }
2383 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2384 if ((buflen -= 8) < 0)
2385 goto out_resource;
2386 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2387 WRITE64(dummy64);
2388 }
2389 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2390 if ((buflen -= 8) < 0)
2391 goto out_resource;
2392 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2393 WRITE64(dummy64);
2394 }
2395 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2396 if ((buflen -= 8) < 0)
2397 goto out_resource;
2398 dummy64 = (u64)stat.blocks << 9;
2399 WRITE64(dummy64);
2400 }
2401 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2402 if ((buflen -= 12) < 0)
2403 goto out_resource;
2404 WRITE32(0);
2405 WRITE32(stat.atime.tv_sec);
2406 WRITE32(stat.atime.tv_nsec);
2407 }
2408 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2409 if ((buflen -= 12) < 0)
2410 goto out_resource;
2411 WRITE32(0);
2412 WRITE32(1);
2413 WRITE32(0);
2414 }
2415 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2416 if ((buflen -= 12) < 0)
2417 goto out_resource;
2418 WRITE32(0);
2419 WRITE32(stat.ctime.tv_sec);
2420 WRITE32(stat.ctime.tv_nsec);
2421 }
2422 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2423 if ((buflen -= 12) < 0)
2424 goto out_resource;
2425 WRITE32(0);
2426 WRITE32(stat.mtime.tv_sec);
2427 WRITE32(stat.mtime.tv_nsec);
2428 }
2429 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 2430 if ((buflen -= 8) < 0)
2431 goto out_resource;
406a7ea9
FF		 2432 /*
2433 * Get parent's attributes if not ignoring crossmount
2434 * and this is the root of a cross-mounted filesystem.
2435 */
2436 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2437 dentry == exp->ex_path.mnt->mnt_root)
2438 get_parent_attributes(exp, &stat);
40ee5dc6 2439 WRITE64(stat.ino);
1da177e4 2440 }
8c18f205
BH		 2441 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2442 WRITE32(3);
2443 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2444 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2445 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2446 }
7e705706 2447
1da177e4
LT		 2448 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2449 *countp = p - buffer;
2450 status = nfs_ok;
2451
2452out:
28e05dd8 2453 kfree(acl);
1da177e4
LT		 2454 if (fhp == &tempfh)
2455 fh_put(&tempfh);
2456 return status;
2457out_nfserr:
b8dd7b9a 2458 status = nfserrno(err);
1da177e4
LT		 2459 goto out;
2460out_resource:
2461 *countp = 0;
2462 status = nfserr_resource;
2463 goto out;
2464out_serverfault:
2465 status = nfserr_serverfault;
2466 goto out;
2467}
2468
c0ce6ec8
BF		 2469static inline int attributes_need_mount(u32 *bmval)
2470{
2471 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2472 return 1;
2473 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2474 return 1;
2475 return 0;
2476}
2477
b37ad28b 2478static __be32
1da177e4 2479nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2ebbc012 2480 const char *name, int namlen, __be32 *p, int *buflen)
1da177e4
LT		 2481{
2482 struct svc_export *exp = cd->rd_fhp->fh_export;
2483 struct dentry *dentry;
b37ad28b 2484 __be32 nfserr;
406a7ea9 2485 int ignore_crossmnt = 0;
1da177e4
LT		 2486
2487 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2488 if (IS_ERR(dentry))
2489 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2490 if (!dentry->d_inode) {
2491 /*
2492 * nfsd_buffered_readdir drops the i_mutex between
2493 * readdir and calling this callback, leaving a window
2494 * where this directory entry could have gone away.
2495 */
2496 dput(dentry);
2497 return nfserr_noent;
2498 }
1da177e4
LT		 2499
2500 exp_get(exp);
406a7ea9
FF		 2501 /*
2502 * In the case of a mountpoint, the client may be asking for
2503 * attributes that are only properties of the underlying filesystem
2504 * as opposed to the cross-mounted file system. In such a case,
2505 * we will not follow the cross mount and will fill the attribtutes
2506 * directly from the mountpoint dentry.
2507 */
3227fa41 2508 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2509 int err;
2510
3227fa41
BF		 2511 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2512 && !attributes_need_mount(cd->rd_bmval)) {
2513 ignore_crossmnt = 1;
2514 goto out_encode;
2515 }
dcb488a3
AA		 2516 /*
2517 * Why the heck aren't we just using nfsd_lookup??
2518 * Different "."/".." handling? Something else?
2519 * At least, add a comment here to explain....
2520 */
021d3a72
BF		 2521 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2522 if (err) {
2523 nfserr = nfserrno(err);
1da177e4
LT		 2524 goto out_put;
2525 }
dcb488a3
AA		 2526 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2527 if (nfserr)
2528 goto out_put;
1da177e4
LT		 2529
2530 }
3227fa41 2531out_encode:
1da177e4 2532 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 2533 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2534out_put:
2535 dput(dentry);
2536 exp_put(exp);
2537 return nfserr;
2538}
2539
2ebbc012 2540static __be32 *
b37ad28b 2541nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2542{
2ebbc012 2543 __be32 *attrlenp;
1da177e4
LT		 2544
2545 if (buflen < 6)
2546 return NULL;
2547 *p++ = htonl(2);
2548 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2549 *p++ = htonl(0); /* bmval1 */
2550
2551 attrlenp = p++;
2552 *p++ = nfserr; /* no htonl */
2553 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2554 return p;
2555}
2556
2557static int
a0ad13ef
N		 2558nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2559 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2560{
a0ad13ef 2561 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2562 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2563 int buflen;
2ebbc012 2564 __be32 *p = cd->buffer;
b2c0cea6 2565 __be32 *cookiep;
b37ad28b 2566 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2567
2568 /* In nfsv4, "." and ".." never make it onto the wire.. */
2569 if (name && isdotent(name, namlen)) {
2570 cd->common.err = nfs_ok;
2571 return 0;
2572 }
2573
2574 if (cd->offset)
2575 xdr_encode_hyper(cd->offset, (u64) offset);
2576
2577 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2578 if (buflen < 0)
2579 goto fail;
2580
2581 *p++ = xdr_one; /* mark entry present */
b2c0cea6 2582 cookiep = p;
1da177e4
LT		 2583 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2584 p = xdr_encode_array(p, name, namlen); /* name length & name */
2585
2586 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2587 switch (nfserr) {
2588 case nfs_ok:
2589 p += buflen;
2590 break;
2591 case nfserr_resource:
2592 nfserr = nfserr_toosmall;
2593 goto fail;
b2c0cea6
BF		 2594 case nfserr_noent:
2595 goto skip_entry;
1da177e4
LT		 2596 default:
2597 /*
2598 * If the client requested the RDATTR_ERROR attribute,
2599 * we stuff the error code into this attribute
2600 * and continue. If this attribute was not requested,
2601 * then in accordance with the spec, we fail the
2602 * entire READDIR operation(!)
2603 */
2604 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2605 goto fail;
1da177e4 2606 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2607 if (p == NULL) {
2608 nfserr = nfserr_toosmall;
1da177e4 2609 goto fail;
34081efc 2610 }
1da177e4
LT		 2611 }
2612 cd->buflen -= (p - cd->buffer);
2613 cd->buffer = p;
b2c0cea6
BF		 2614 cd->offset = cookiep;
2615skip_entry:
1da177e4
LT		 2616 cd->common.err = nfs_ok;
2617 return 0;
2618fail:
2619 cd->common.err = nfserr;
2620 return -EINVAL;
2621}
2622
e2f282b9
BH		 2623static void
2624nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2625{
bc749ca4 2626 __be32 *p;
e2f282b9
BH		 2627
2628 RESERVE_SPACE(sizeof(stateid_t));
2629 WRITE32(sid->si_generation);
2630 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2631 ADJUST_ARGS();
2632}
2633
695e12f8 2634static __be32
b37ad28b 2635nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2636{
bc749ca4 2637 __be32 *p;
1da177e4
LT		 2638
2639 if (!nfserr) {
2640 RESERVE_SPACE(8);
2641 WRITE32(access->ac_supported);
2642 WRITE32(access->ac_resp_access);
2643 ADJUST_ARGS();
2644 }
695e12f8 2645 return nfserr;
1da177e4
LT		 2646}
2647
1d1bc8f2
BF		 2648static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2649{
2650 __be32 *p;
2651
2652 if (!nfserr) {
2653 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2654 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2655 WRITE32(bcts->dir);
6e67b5d1 2656 /* Sorry, we do not yet support RDMA over 4.1: */
1d1bc8f2
BF		 2657 WRITE32(0);
2658 ADJUST_ARGS();
2659 }
2660 return nfserr;
2661}
2662
695e12f8 2663static __be32
b37ad28b 2664nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4
LT		 2665{
2666 ENCODE_SEQID_OP_HEAD;
2667
e2f282b9
BH		 2668 if (!nfserr)
2669 nfsd4_encode_stateid(resp, &close->cl_stateid);
2670
f3e42237 2671 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2672 return nfserr;
1da177e4
LT		 2673}
2674
2675
695e12f8 2676static __be32
b37ad28b 2677nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2678{
bc749ca4 2679 __be32 *p;
1da177e4
LT		 2680
2681 if (!nfserr) {
ab4684d1
CL		 2682 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
2683 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 2684 ADJUST_ARGS();
2685 }
695e12f8 2686 return nfserr;
1da177e4
LT		 2687}
2688
695e12f8 2689static __be32
b37ad28b 2690nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2691{
bc749ca4 2692 __be32 *p;
1da177e4
LT		 2693
2694 if (!nfserr) {
2695 RESERVE_SPACE(32);
c654b8a9 2696 write_cinfo(&p, &create->cr_cinfo);
1da177e4
LT		 2697 WRITE32(2);
2698 WRITE32(create->cr_bmval[0]);
2699 WRITE32(create->cr_bmval[1]);
2700 ADJUST_ARGS();
2701 }
695e12f8 2702 return nfserr;
1da177e4
LT		 2703}
2704
b37ad28b
AV		 2705static __be32
2706nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2707{
2708 struct svc_fh *fhp = getattr->ga_fhp;
2709 int buflen;
2710
2711 if (nfserr)
2712 return nfserr;
2713
2714 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2715 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2716 resp->p, &buflen, getattr->ga_bmval,
406a7ea9 2717 resp->rqstp, 0);
1da177e4
LT		 2718 if (!nfserr)
2719 resp->p += buflen;
2720 return nfserr;
2721}
2722
695e12f8
BH		 2723static __be32
2724nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2725{
695e12f8 2726 struct svc_fh *fhp = *fhpp;
1da177e4 2727 unsigned int len;
bc749ca4 2728 __be32 *p;
1da177e4
LT		 2729
2730 if (!nfserr) {
2731 len = fhp->fh_handle.fh_size;
2732 RESERVE_SPACE(len + 4);
2733 WRITE32(len);
2734 WRITEMEM(&fhp->fh_handle.fh_base, len);
2735 ADJUST_ARGS();
2736 }
695e12f8 2737 return nfserr;
1da177e4
LT		 2738}
2739
2740/*
2741* Including all fields other than the name, a LOCK4denied structure requires
2742* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2743*/
2744static void
2745nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2746{
7c13f344 2747 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2748 __be32 *p;
1da177e4 2749
7c13f344 2750 RESERVE_SPACE(32 + XDR_LEN(conf->len));
1da177e4
LT		 2751 WRITE64(ld->ld_start);
2752 WRITE64(ld->ld_length);
2753 WRITE32(ld->ld_type);
7c13f344 2754 if (conf->len) {
1da177e4 2755 WRITEMEM(&ld->ld_clientid, 8);
7c13f344
BF		 2756 WRITE32(conf->len);
2757 WRITEMEM(conf->data, conf->len);
2758 kfree(conf->data);
1da177e4
LT		 2759 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2760 WRITE64((u64)0); /* clientid */
2761 WRITE32(0); /* length of owner name */
2762 }
2763 ADJUST_ARGS();
2764}
2765
695e12f8 2766static __be32
b37ad28b 2767nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2768{
1da177e4
LT		 2769 ENCODE_SEQID_OP_HEAD;
2770
e2f282b9
BH		 2771 if (!nfserr)
2772 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2773 else if (nfserr == nfserr_denied)
1da177e4
LT		 2774 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2775
f3e42237 2776 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2777 return nfserr;
1da177e4
LT		 2778}
2779
695e12f8 2780static __be32
b37ad28b 2781nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2782{
2783 if (nfserr == nfserr_denied)
2784 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2785 return nfserr;
1da177e4
LT		 2786}
2787
695e12f8 2788static __be32
b37ad28b 2789nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4
LT		 2790{
2791 ENCODE_SEQID_OP_HEAD;
2792
e2f282b9
BH		 2793 if (!nfserr)
2794 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2795
f3e42237 2796 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2797 return nfserr;
1da177e4
LT		 2798}
2799
2800
695e12f8 2801static __be32
b37ad28b 2802nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2803{
bc749ca4 2804 __be32 *p;
1da177e4
LT		 2805
2806 if (!nfserr) {
2807 RESERVE_SPACE(20);
c654b8a9 2808 write_cinfo(&p, &link->li_cinfo);
1da177e4
LT		 2809 ADJUST_ARGS();
2810 }
695e12f8 2811 return nfserr;
1da177e4
LT		 2812}
2813
2814
695e12f8 2815static __be32
b37ad28b 2816nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2817{
bc749ca4 2818 __be32 *p;
1da177e4
LT		 2819 ENCODE_SEQID_OP_HEAD;
2820
2821 if (nfserr)
2822 goto out;
2823
e2f282b9
BH		 2824 nfsd4_encode_stateid(resp, &open->op_stateid);
2825 RESERVE_SPACE(40);
c654b8a9 2826 write_cinfo(&p, &open->op_cinfo);
1da177e4
LT		 2827 WRITE32(open->op_rflags);
2828 WRITE32(2);
2829 WRITE32(open->op_bmval[0]);
2830 WRITE32(open->op_bmval[1]);
2831 WRITE32(open->op_delegate_type);
2832 ADJUST_ARGS();
2833
2834 switch (open->op_delegate_type) {
2835 case NFS4_OPEN_DELEGATE_NONE:
2836 break;
2837 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2838 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2839 RESERVE_SPACE(20);
7b190fec 2840 WRITE32(open->op_recall);
1da177e4
LT		 2841
2842 /*
2843 * TODO: ACE's in delegations
2844 */
2845 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2846 WRITE32(0);
2847 WRITE32(0);
2848 WRITE32(0); /* XXX: is NULL principal ok? */
2849 ADJUST_ARGS();
2850 break;
2851 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2852 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2853 RESERVE_SPACE(32);
1da177e4
LT		 2854 WRITE32(0);
2855
2856 /*
2857 * TODO: space_limit's in delegations
2858 */
2859 WRITE32(NFS4_LIMIT_SIZE);
2860 WRITE32(~(u32)0);
2861 WRITE32(~(u32)0);
2862
2863 /*
2864 * TODO: ACE's in delegations
2865 */
2866 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2867 WRITE32(0);
2868 WRITE32(0);
2869 WRITE32(0); /* XXX: is NULL principal ok? */
2870 ADJUST_ARGS();
2871 break;
d24433cd
BH		 2872 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
2873 switch (open->op_why_no_deleg) {
2874 case WND4_CONTENTION:
2875 case WND4_RESOURCE:
2876 RESERVE_SPACE(8);
2877 WRITE32(open->op_why_no_deleg);
2878 WRITE32(0); /* deleg signaling not supported yet */
2879 break;
2880 default:
2881 RESERVE_SPACE(4);
2882 WRITE32(open->op_why_no_deleg);
2883 }
2884 ADJUST_ARGS();
2885 break;
1da177e4
LT		 2886 default:
2887 BUG();
2888 }
2889 /* XXX save filehandle here */
2890out:
f3e42237 2891 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2892 return nfserr;
1da177e4
LT		 2893}
2894
695e12f8 2895static __be32
b37ad28b 2896nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4
LT		 2897{
2898 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2899
2900 if (!nfserr)
2901 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4 2902
f3e42237 2903 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2904 return nfserr;
1da177e4
LT		 2905}
2906
695e12f8 2907static __be32
b37ad28b 2908nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4
LT		 2909{
2910 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2911
2912 if (!nfserr)
2913 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4 2914
f3e42237 2915 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2916 return nfserr;
1da177e4
LT		 2917}
2918
b37ad28b
AV		 2919static __be32
2920nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2921 struct nfsd4_read *read)
1da177e4
LT		 2922{
2923 u32 eof;
2924 int v, pn;
2925 unsigned long maxcount;
2926 long len;
bc749ca4 2927 __be32 *p;
1da177e4
LT		 2928
2929 if (nfserr)
2930 return nfserr;
2931 if (resp->xbuf->page_len)
2932 return nfserr_resource;
2933
2934 RESERVE_SPACE(8); /* eof flag and byte count */
2935
7adae489 2936 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2937 if (maxcount > read->rd_length)
2938 maxcount = read->rd_length;
2939
2940 len = maxcount;
2941 v = 0;
2942 while (len > 0) {
44524359 2943 pn = resp->rqstp->rq_resused++;
3cc03b16 2944 resp->rqstp->rq_vec[v].iov_base =
44524359 2945 page_address(resp->rqstp->rq_respages[pn]);
3cc03b16 2946 resp->rqstp->rq_vec[v].iov_len =
44524359 2947 len < PAGE_SIZE ? len : PAGE_SIZE;
1da177e4
LT		 2948 v++;
2949 len -= PAGE_SIZE;
2950 }
2951 read->rd_vlen = v;
2952
039a87ca 2953 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2954 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2955 &maxcount);
2956
1da177e4
LT		 2957 if (nfserr)
2958 return nfserr;
44524359
N		 2959 eof = (read->rd_offset + maxcount >=
2960 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2961
2962 WRITE32(eof);
2963 WRITE32(maxcount);
2964 ADJUST_ARGS();
6ed6decc
N		 2965 resp->xbuf->head[0].iov_len = (char*)p
2966 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2967 resp->xbuf->page_len = maxcount;
2968
6ed6decc 2969 /* Use rest of head for padding and remaining ops: */
6ed6decc 2970 resp->xbuf->tail[0].iov_base = p;
1da177e4 2971 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2972 if (maxcount&3) {
6ed6decc
N		 2973 RESERVE_SPACE(4);
2974 WRITE32(0);
1da177e4
LT		 2975 resp->xbuf->tail[0].iov_base += maxcount&3;
2976 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2977 ADJUST_ARGS();
1da177e4
LT		 2978 }
2979 return 0;
2980}
2981
b37ad28b
AV		 2982static __be32
2983nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 2984{
2985 int maxcount;
2986 char *page;
bc749ca4 2987 __be32 *p;
1da177e4
LT		 2988
2989 if (nfserr)
2990 return nfserr;
2991 if (resp->xbuf->page_len)
2992 return nfserr_resource;
2993
44524359 2994 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2995
2996 maxcount = PAGE_SIZE;
2997 RESERVE_SPACE(4);
2998
2999 /*
3000 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3001 * if they would overflow the buffer. Is this kosher in NFSv4? If
3002 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3003 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3004 */
3005 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
3006 if (nfserr == nfserr_isdir)
3007 return nfserr_inval;
3008 if (nfserr)
3009 return nfserr;
3010
3011 WRITE32(maxcount);
3012 ADJUST_ARGS();
6ed6decc
N		 3013 resp->xbuf->head[0].iov_len = (char*)p
3014 - (char*)resp->xbuf->head[0].iov_base;
3015 resp->xbuf->page_len = maxcount;
1da177e4 3016
6ed6decc 3017 /* Use rest of head for padding and remaining ops: */
6ed6decc 3018 resp->xbuf->tail[0].iov_base = p;
1da177e4 3019 resp->xbuf->tail[0].iov_len = 0;
1da177e4 3020 if (maxcount&3) {
6ed6decc
N		 3021 RESERVE_SPACE(4);
3022 WRITE32(0);
1da177e4
LT		 3023 resp->xbuf->tail[0].iov_base += maxcount&3;
3024 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 3025 ADJUST_ARGS();
1da177e4
LT		 3026 }
3027 return 0;
3028}
3029
b37ad28b
AV		 3030static __be32
3031nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3032{
3033 int maxcount;
3034 loff_t offset;
2ebbc012 3035 __be32 *page, *savep, *tailbase;
bc749ca4 3036 __be32 *p;
1da177e4
LT		 3037
3038 if (nfserr)
3039 return nfserr;
3040 if (resp->xbuf->page_len)
3041 return nfserr_resource;
3042
ab4684d1 3043 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
1da177e4
LT		 3044 savep = p;
3045
3046 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3047 WRITE32(0);
3048 WRITE32(0);
3049 ADJUST_ARGS();
3050 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 3051 tailbase = p;
1da177e4
LT		 3052
3053 maxcount = PAGE_SIZE;
3054 if (maxcount > readdir->rd_maxcount)
3055 maxcount = readdir->rd_maxcount;
3056
3057 /*
3058 * Convert from bytes to words, account for the two words already
3059 * written, make sure to leave two words at the end for the next
3060 * pointer and eof field.
3061 */
3062 maxcount = (maxcount >> 2) - 4;
3063 if (maxcount < 0) {
3064 nfserr = nfserr_toosmall;
3065 goto err_no_verf;
3066 }
3067
44524359 3068 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 3069 readdir->common.err = 0;
3070 readdir->buflen = maxcount;
3071 readdir->buffer = page;
3072 readdir->offset = NULL;
3073
3074 offset = readdir->rd_cookie;
3075 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3076 &offset,
3077 &readdir->common, nfsd4_encode_dirent);
3078 if (nfserr == nfs_ok &&
3079 readdir->common.err == nfserr_toosmall &&
3080 readdir->buffer == page)
3081 nfserr = nfserr_toosmall;
1da177e4
LT		 3082 if (nfserr)
3083 goto err_no_verf;
3084
3085 if (readdir->offset)
3086 xdr_encode_hyper(readdir->offset, offset);
3087
3088 p = readdir->buffer;
3089 *p++ = 0; /* no more entries */
3090 *p++ = htonl(readdir->common.err == nfserr_eof);
44524359
N		 3091 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
3092 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
1da177e4 3093
bb6e8a9f 3094 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 3095 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 3096 resp->xbuf->tail[0].iov_len = 0;
3097 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 3098 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 3099
3100 return 0;
3101err_no_verf:
3102 p = savep;
3103 ADJUST_ARGS();
3104 return nfserr;
3105}
3106
695e12f8 3107static __be32
b37ad28b 3108nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3109{
bc749ca4 3110 __be32 *p;
1da177e4
LT		 3111
3112 if (!nfserr) {
3113 RESERVE_SPACE(20);
c654b8a9 3114 write_cinfo(&p, &remove->rm_cinfo);
1da177e4
LT		 3115 ADJUST_ARGS();
3116 }
695e12f8 3117 return nfserr;
1da177e4
LT		 3118}
3119
695e12f8 3120static __be32
b37ad28b 3121nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3122{
bc749ca4 3123 __be32 *p;
1da177e4
LT		 3124
3125 if (!nfserr) {
3126 RESERVE_SPACE(40);
c654b8a9
BF		 3127 write_cinfo(&p, &rename->rn_sinfo);
3128 write_cinfo(&p, &rename->rn_tinfo);
1da177e4
LT		 3129 ADJUST_ARGS();
3130 }
695e12f8 3131 return nfserr;
1da177e4
LT		 3132}
3133
695e12f8 3134static __be32
22b6dee8
MJ		 3135nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
3136 __be32 nfserr,struct svc_export *exp)
dcb488a3
AA		 3137{
3138 int i = 0;
4796f457
BF		 3139 u32 nflavs;
3140 struct exp_flavor_info *flavs;
3141 struct exp_flavor_info def_flavs[2];
bc749ca4 3142 __be32 *p;
dcb488a3
AA		 3143
3144 if (nfserr)
3145 goto out;
4796f457
BF		 3146 if (exp->ex_nflavors) {
3147 flavs = exp->ex_flavors;
3148 nflavs = exp->ex_nflavors;
3149 } else { /* Handling of some defaults in absence of real secinfo: */
3150 flavs = def_flavs;
3151 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3152 nflavs = 2;
3153 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3154 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3155 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3156 nflavs = 1;
3157 flavs[0].pseudoflavor
3158 = svcauth_gss_flavor(exp->ex_client);
3159 } else {
3160 nflavs = 1;
3161 flavs[0].pseudoflavor
3162 = exp->ex_client->flavour->flavour;
3163 }
3164 }
3165
dcb488a3 3166 RESERVE_SPACE(4);
4796f457 3167 WRITE32(nflavs);
dcb488a3 3168 ADJUST_ARGS();
4796f457
BF		 3169 for (i = 0; i < nflavs; i++) {
3170 u32 flav = flavs[i].pseudoflavor;
dcb488a3
AA		 3171 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
3172
3173 if (gm) {
3174 RESERVE_SPACE(4);
3175 WRITE32(RPC_AUTH_GSS);
3176 ADJUST_ARGS();
3177 RESERVE_SPACE(4 + gm->gm_oid.len);
3178 WRITE32(gm->gm_oid.len);
3179 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
3180 ADJUST_ARGS();
3181 RESERVE_SPACE(4);
3182 WRITE32(0); /* qop */
3183 ADJUST_ARGS();
3184 RESERVE_SPACE(4);
3185 WRITE32(gss_pseudoflavor_to_service(gm, flav));
3186 ADJUST_ARGS();
3187 gss_mech_put(gm);
3188 } else {
3189 RESERVE_SPACE(4);
3190 WRITE32(flav);
3191 ADJUST_ARGS();
3192 }
3193 }
3194out:
3195 if (exp)
3196 exp_put(exp);
695e12f8 3197 return nfserr;
dcb488a3
AA		 3198}
3199
22b6dee8
MJ		 3200static __be32
3201nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3202 struct nfsd4_secinfo *secinfo)
3203{
3204 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3205}
3206
3207static __be32
3208nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3209 struct nfsd4_secinfo_no_name *secinfo)
3210{
3211 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3212}
3213
1da177e4
LT		 3214/*
3215 * The SETATTR encode routine is special -- it always encodes a bitmap,
3216 * regardless of the error status.
3217 */
695e12f8 3218static __be32
b37ad28b 3219nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3220{
bc749ca4 3221 __be32 *p;
1da177e4
LT		 3222
3223 RESERVE_SPACE(12);
3224 if (nfserr) {
3225 WRITE32(2);
3226 WRITE32(0);
3227 WRITE32(0);
3228 }
3229 else {
3230 WRITE32(2);
3231 WRITE32(setattr->sa_bmval[0]);
3232 WRITE32(setattr->sa_bmval[1]);
3233 }
3234 ADJUST_ARGS();
695e12f8 3235 return nfserr;
1da177e4
LT		 3236}
3237
695e12f8 3238static __be32
b37ad28b 3239nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3240{
bc749ca4 3241 __be32 *p;
1da177e4
LT		 3242
3243 if (!nfserr) {
ab4684d1 3244 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE);
1da177e4 3245 WRITEMEM(&scd->se_clientid, 8);
ab4684d1 3246 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3247 ADJUST_ARGS();
3248 }
3249 else if (nfserr == nfserr_clid_inuse) {
3250 RESERVE_SPACE(8);
3251 WRITE32(0);
3252 WRITE32(0);
3253 ADJUST_ARGS();
3254 }
695e12f8 3255 return nfserr;
1da177e4
LT		 3256}
3257
695e12f8 3258static __be32
b37ad28b 3259nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3260{
bc749ca4 3261 __be32 *p;
1da177e4
LT		 3262
3263 if (!nfserr) {
3264 RESERVE_SPACE(16);
3265 WRITE32(write->wr_bytes_written);
3266 WRITE32(write->wr_how_written);
ab4684d1 3267 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3268 ADJUST_ARGS();
3269 }
695e12f8 3270 return nfserr;
1da177e4
LT		 3271}
3272
2db134eb 3273static __be32
57b7b43b 3274nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3275 struct nfsd4_exchange_id *exid)
3276{
bc749ca4 3277 __be32 *p;
0733d213
AA		 3278 char *major_id;
3279 char *server_scope;
3280 int major_id_sz;
3281 int server_scope_sz;
3282 uint64_t minor_id = 0;
3283
3284 if (nfserr)
3285 return nfserr;
3286
3287 major_id = utsname()->nodename;
3288 major_id_sz = strlen(major_id);
3289 server_scope = utsname()->nodename;
3290 server_scope_sz = strlen(server_scope);
3291
3292 RESERVE_SPACE(
3293 8 /* eir_clientid */ +
3294 4 /* eir_sequenceid */ +
3295 4 /* eir_flags */ +
3296 4 /* spr_how (SP4_NONE) */ +
3297 8 /* so_minor_id */ +
3298 4 /* so_major_id.len */ +
3299 (XDR_QUADLEN(major_id_sz) * 4) +
3300 4 /* eir_server_scope.len */ +
3301 (XDR_QUADLEN(server_scope_sz) * 4) +
3302 4 /* eir_server_impl_id.count (0) */);
3303
3304 WRITEMEM(&exid->clientid, 8);
3305 WRITE32(exid->seqid);
3306 WRITE32(exid->flags);
3307
3308 /* state_protect4_r. Currently only support SP4_NONE */
3309 BUG_ON(exid->spa_how != SP4_NONE);
3310 WRITE32(exid->spa_how);
3311
3312 /* The server_owner struct */
3313 WRITE64(minor_id); /* Minor id */
3314 /* major id */
3315 WRITE32(major_id_sz);
3316 WRITEMEM(major_id, major_id_sz);
3317
3318 /* Server scope */
3319 WRITE32(server_scope_sz);
3320 WRITEMEM(server_scope, server_scope_sz);
3321
3322 /* Implementation id */
3323 WRITE32(0); /* zero length nfs_impl_id4 array */
3324 ADJUST_ARGS();
3325 return 0;
2db134eb
AA		 3326}
3327
3328static __be32
57b7b43b 3329nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3330 struct nfsd4_create_session *sess)
3331{
bc749ca4 3332 __be32 *p;
ec6b5d7b
AA		 3333
3334 if (nfserr)
3335 return nfserr;
3336
3337 RESERVE_SPACE(24);
3338 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3339 WRITE32(sess->seqid);
3340 WRITE32(sess->flags);
3341 ADJUST_ARGS();
3342
3343 RESERVE_SPACE(28);
3344 WRITE32(0); /* headerpadsz */
3345 WRITE32(sess->fore_channel.maxreq_sz);
3346 WRITE32(sess->fore_channel.maxresp_sz);
3347 WRITE32(sess->fore_channel.maxresp_cached);
3348 WRITE32(sess->fore_channel.maxops);
3349 WRITE32(sess->fore_channel.maxreqs);
3350 WRITE32(sess->fore_channel.nr_rdma_attrs);
3351 ADJUST_ARGS();
3352
3353 if (sess->fore_channel.nr_rdma_attrs) {
3354 RESERVE_SPACE(4);
3355 WRITE32(sess->fore_channel.rdma_attrs);
3356 ADJUST_ARGS();
3357 }
3358
3359 RESERVE_SPACE(28);
3360 WRITE32(0); /* headerpadsz */
3361 WRITE32(sess->back_channel.maxreq_sz);
3362 WRITE32(sess->back_channel.maxresp_sz);
3363 WRITE32(sess->back_channel.maxresp_cached);
3364 WRITE32(sess->back_channel.maxops);
3365 WRITE32(sess->back_channel.maxreqs);
3366 WRITE32(sess->back_channel.nr_rdma_attrs);
3367 ADJUST_ARGS();
3368
3369 if (sess->back_channel.nr_rdma_attrs) {
3370 RESERVE_SPACE(4);
3371 WRITE32(sess->back_channel.rdma_attrs);
3372 ADJUST_ARGS();
3373 }
3374 return 0;
2db134eb
AA		 3375}
3376
3377static __be32
57b7b43b 3378nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3379 struct nfsd4_destroy_session *destroy_session)
3380{
2db134eb
AA		 3381 return nfserr;
3382}
3383
e1ca12df 3384static __be32
d1829b38 3385nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
e1ca12df
BS		 3386 struct nfsd4_free_stateid *free_stateid)
3387{
3388 __be32 *p;
3389
3390 if (nfserr)
3391 return nfserr;
3392
3393 RESERVE_SPACE(4);
d1829b38 3394 *p++ = nfserr;
e1ca12df
BS		 3395 ADJUST_ARGS();
3396 return nfserr;
3397}
3398
c47d832b 3399static __be32
57b7b43b 3400nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3401 struct nfsd4_sequence *seq)
3402{
bc749ca4 3403 __be32 *p;
b85d4c01
BH		 3404
3405 if (nfserr)
3406 return nfserr;
3407
3408 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3409 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3410 WRITE32(seq->seqid);
3411 WRITE32(seq->slotid);
b7d7ca35
BF		 3412 /* Note slotid's are numbered from zero: */
3413 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3414 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
0d7bb719 3415 WRITE32(seq->status_flags);
b85d4c01
BH		 3416
3417 ADJUST_ARGS();
557ce264 3418 resp->cstate.datap = p; /* DRC cache data pointer */
b85d4c01 3419 return 0;
2db134eb
AA		 3420}
3421
2355c596 3422static __be32
57b7b43b 3423nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3424 struct nfsd4_test_stateid *test_stateid)
3425{
03cfb420 3426 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3427 __be32 *p;
17456804 3428
03cfb420 3429 RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
17456804 3430 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3431
03cfb420 3432 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3433 *p++ = stateid->ts_id_status;
17456804 3434 }
17456804 3435
03cfb420 3436 ADJUST_ARGS();
17456804
BS		 3437 return nfserr;
3438}
3439
695e12f8
BH		 3440static __be32
3441nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3442{
3443 return nfserr;
3444}
3445
3446typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3447
2db134eb
AA		 3448/*
3449 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3450 * since we don't need to filter out obsolete ops as this is
3451 * done in the decoding phase.
3452 */
695e12f8 3453static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3454 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3455 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3456 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3457 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3458 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3459 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3460 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3461 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3462 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3463 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3464 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3465 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3466 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3467 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3468 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3469 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3470 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3471 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3472 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3473 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3474 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3475 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3476 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3477 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3478 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3479 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3480 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3481 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3482 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3483 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3484 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3485 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3486 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3487 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3488 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3489 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3490 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3491
3492 /* NFSv4.1 operations */
3493 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3494 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3495 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3496 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3497 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
e1ca12df 3498 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
2db134eb
AA		 3499 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3500 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3501 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3502 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3503 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3504 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3505 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3506 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3507 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3508 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3509 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3510 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3511 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3512};
3513
496c262c
AA		 3514/*
3515 * Calculate the total amount of memory that the compound response has taken
58e7b33a 3516 * after encoding the current operation with pad.
496c262c 3517 *
58e7b33a
MJ		 3518 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3519 * which was specified at nfsd4_operation, else pad is zero.
496c262c 3520 *
58e7b33a 3521 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
496c262c
AA		 3522 *
3523 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3524 * will be at least a page and will therefore hold the xdr_buf head.
3525 */
57b7b43b 3526__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
496c262c 3527{
496c262c 3528 struct xdr_buf *xb = &resp->rqstp->rq_res;
496c262c
AA		 3529 struct nfsd4_session *session = NULL;
3530 struct nfsd4_slot *slot = resp->cstate.slot;
58e7b33a 3531 u32 length, tlen = 0;
496c262c
AA		 3532
3533 if (!nfsd4_has_session(&resp->cstate))
58e7b33a 3534 return 0;
496c262c
AA		 3535
3536 session = resp->cstate.session;
58e7b33a
MJ		 3537 if (session == NULL)
3538 return 0;
496c262c
AA		 3539
3540 if (xb->page_len == 0) {
3541 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3542 } else {
3543 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3544 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3545
3546 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3547 }
3548 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3549 length, xb->page_len, tlen, pad);
3550
58e7b33a
MJ		 3551 if (length > session->se_fchannel.maxresp_sz)
3552 return nfserr_rep_too_big;
3553
73e79482 3554 if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
58e7b33a 3555 length > session->se_fchannel.maxresp_cached)
496c262c 3556 return nfserr_rep_too_big_to_cache;
58e7b33a
MJ		 3557
3558 return 0;
496c262c
AA		 3559}
3560
1da177e4
LT		 3561void
3562nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3563{
2ebbc012 3564 __be32 *statp;
bc749ca4 3565 __be32 *p;
1da177e4
LT		 3566
3567 RESERVE_SPACE(8);
3568 WRITE32(op->opnum);
3569 statp = p++; /* to be backfilled at the end */
3570 ADJUST_ARGS();
3571
695e12f8
BH		 3572 if (op->opnum == OP_ILLEGAL)
3573 goto status;
3574 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3575 !nfsd4_enc_ops[op->opnum]);
3576 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
496c262c 3577 /* nfsd4_check_drc_limit guarantees enough room for error status */
58e7b33a
MJ		 3578 if (!op->status)
3579 op->status = nfsd4_check_resp_size(resp, 0);
695e12f8 3580status:
1da177e4
LT		 3581 /*
3582 * Note: We write the status directly, instead of using WRITE32(),
3583 * since it is already in network byte order.
3584 */
3585 *statp = op->status;
3586}
3587
3588/*
3589 * Encode the reply stored in the stateowner reply cache
3590 *
3591 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3592 * previously sent already encoded operation.
3593 *
3594 * called with nfs4_lock_state() held
3595 */
3596void
3597nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3598{
bc749ca4 3599 __be32 *p;
1da177e4
LT		 3600 struct nfs4_replay *rp = op->replay;
3601
3602 BUG_ON(!rp);
3603
3604 RESERVE_SPACE(8);
3605 WRITE32(op->opnum);
3606 *p++ = rp->rp_status; /* already xdr'ed */
3607 ADJUST_ARGS();
3608
3609 RESERVE_SPACE(rp->rp_buflen);
3610 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3611 ADJUST_ARGS();
3612}
3613
1da177e4 3614int
2ebbc012 3615nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3616{
3617 return xdr_ressize_check(rqstp, p);
3618}
3619
3e98abff 3620int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3621{
3e98abff
BF		 3622 struct svc_rqst *rqstp = rq;
3623 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3624
1da177e4
LT		 3625 if (args->ops != args->iops) {
3626 kfree(args->ops);
3627 args->ops = args->iops;
3628 }
f99d49ad
JJ		 3629 kfree(args->tmpp);
3630 args->tmpp = NULL;
1da177e4
LT		 3631 while (args->to_free) {
3632 struct tmpbuf *tb = args->to_free;
3633 args->to_free = tb->next;
3634 tb->release(tb->buf);
3635 kfree(tb);
3636 }
3e98abff 3637 return 1;
1da177e4
LT		 3638}
3639
3640int
2ebbc012 3641nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3642{
1da177e4
LT		 3643 args->p = p;
3644 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3645 args->pagelist = rqstp->rq_arg.pages;
3646 args->pagelen = rqstp->rq_arg.page_len;
3647 args->tmpp = NULL;
3648 args->to_free = NULL;
3649 args->ops = args->iops;
3650 args->rqstp = rqstp;
3651
3e98abff 3652 return !nfsd4_decode_compound(args);
1da177e4
LT		 3653}
3654
3655int
2ebbc012 3656nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3657{
3658 /*
3659 * All that remains is to write the tag and operation count...
3660 */
557ce264 3661 struct nfsd4_compound_state *cs = &resp->cstate;
1da177e4
LT		 3662 struct kvec *iov;
3663 p = resp->tagp;
3664 *p++ = htonl(resp->taglen);
3665 memcpy(p, resp->tag, resp->taglen);
3666 p += XDR_QUADLEN(resp->taglen);
3667 *p++ = htonl(resp->opcnt);
3668
3669 if (rqstp->rq_res.page_len)
3670 iov = &rqstp->rq_res.tail[0];
3671 else
3672 iov = &rqstp->rq_res.head[0];
3673 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3674 BUG_ON(iov->iov_len > PAGE_SIZE);
26c0c75e
BF		 3675 if (nfsd4_has_session(cs)) {
3676 if (cs->status != nfserr_replay_cache) {
3677 nfsd4_store_cache_entry(resp);
73e79482 3678 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 3679 }
d7682988
BH		 3680 /* Renew the clientid on success and on replay */
3681 release_session_client(cs->session);
76407f76 3682 nfsd4_put_session(cs->session);
da3846a2 3683 }
1da177e4
LT		 3684 return 1;
3685}
3686
3687/*
3688 * Local variables:
3689 * c-basic-offset: 8
3690 * End:
3691 */
kernel source for telekom puls (alcatel/mediatek)