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Merge branches 'devel-stable', 'entry', 'fixes', 'mach-types', 'misc' and 'smp-hotplu...
[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"
3d733711 56#include "netns.h"
2ca72e17 57
1da177e4
LT		 58#define NFSDDBG_FACILITY NFSDDBG_XDR
59
42ca0993
BF		 60/*
61 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
62 * directory in order to indicate to the client that a filesystem boundary is present
63 * We use a fixed fsid for a referral
64 */
65#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
66#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
67
b37ad28b 68static __be32
a36b1725 69check_filename(char *str, int len)
1da177e4
LT		 70{
71 int i;
72
73 if (len == 0)
74 return nfserr_inval;
75 if (isdotent(str, len))
a36b1725 76 return nfserr_badname;
1da177e4
LT		 77 for (i = 0; i < len; i++)
78 if (str[i] == '/')
a36b1725 79 return nfserr_badname;
1da177e4
LT		 80 return 0;
81}
82
1da177e4 83#define DECODE_HEAD \
2ebbc012 84 __be32 *p; \
b37ad28b 85 __be32 status
1da177e4
LT		 86#define DECODE_TAIL \
87 status = 0; \
88out: \
89 return status; \
90xdr_error: \
817cb9d4
CL		 91 dprintk("NFSD: xdr error (%s:%d)\n", \
92 __FILE__, __LINE__); \
1da177e4
LT		 93 status = nfserr_bad_xdr; \
94 goto out
95
96#define READ32(x) (x) = ntohl(*p++)
97#define READ64(x) do { \
98 (x) = (u64)ntohl(*p++) << 32; \
99 (x) |= ntohl(*p++); \
100} while (0)
101#define READTIME(x) do { \
102 p++; \
103 (x) = ntohl(*p++); \
104 p++; \
105} while (0)
106#define READMEM(x,nbytes) do { \
107 x = (char *)p; \
108 p += XDR_QUADLEN(nbytes); \
109} while (0)
110#define SAVEMEM(x,nbytes) do { \
111 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
112 savemem(argp, p, nbytes) : \
113 (char *)p)) { \
817cb9d4
CL		 114 dprintk("NFSD: xdr error (%s:%d)\n", \
115 __FILE__, __LINE__); \
1da177e4
LT		 116 goto xdr_error; \
117 } \
118 p += XDR_QUADLEN(nbytes); \
119} while (0)
120#define COPYMEM(x,nbytes) do { \
121 memcpy((x), p, nbytes); \
122 p += XDR_QUADLEN(nbytes); \
123} while (0)
124
125/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
126#define READ_BUF(nbytes) do { \
127 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
128 p = argp->p; \
129 argp->p += XDR_QUADLEN(nbytes); \
130 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 131 dprintk("NFSD: xdr error (%s:%d)\n", \
132 __FILE__, __LINE__); \
1da177e4
LT		 133 goto xdr_error; \
134 } \
135} while (0)
136
ca2a05aa 137static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 138{
139 /* We want more bytes than seem to be available.
140 * Maybe we need a new page, maybe we have just run out
141 */
ca2a05aa 142 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 143 __be32 *p;
1da177e4
LT		 144 if (avail + argp->pagelen < nbytes)
145 return NULL;
146 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
147 return NULL;
148 /* ok, we can do it with the current plus the next page */
149 if (nbytes <= sizeof(argp->tmp))
150 p = argp->tmp;
151 else {
f99d49ad 152 kfree(argp->tmpp);
1da177e4
LT		 153 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
154 if (!p)
155 return NULL;
156
157 }
ca2a05aa
BF		 158 /*
159 * The following memcpy is safe because read_buf is always
160 * called with nbytes > avail, and the two cases above both
161 * guarantee p points to at least nbytes bytes.
162 */
1da177e4
LT		 163 memcpy(p, argp->p, avail);
164 /* step to next page */
165 argp->p = page_address(argp->pagelist[0]);
166 argp->pagelist++;
167 if (argp->pagelen < PAGE_SIZE) {
2bc3c117 168 argp->end = argp->p + (argp->pagelen>>2);
1da177e4
LT		 169 argp->pagelen = 0;
170 } else {
2bc3c117 171 argp->end = argp->p + (PAGE_SIZE>>2);
1da177e4
LT		 172 argp->pagelen -= PAGE_SIZE;
173 }
174 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
175 argp->p += XDR_QUADLEN(nbytes - avail);
176 return p;
177}
178
60adfc50
AA		 179static int zero_clientid(clientid_t *clid)
180{
181 return (clid->cl_boot == 0) && (clid->cl_id == 0);
182}
183
1da177e4
LT		 184static int
185defer_free(struct nfsd4_compoundargs *argp,
186 void (*release)(const void *), void *p)
187{
188 struct tmpbuf *tb;
189
190 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
191 if (!tb)
192 return -ENOMEM;
193 tb->buf = p;
194 tb->release = release;
195 tb->next = argp->to_free;
196 argp->to_free = tb;
197 return 0;
198}
199
2ebbc012 200static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 201{
1da177e4 202 if (p == argp->tmp) {
67114fe6 203 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
a4db5fe5
BF		 204 if (!p)
205 return NULL;
1da177e4 206 } else {
73dff8be 207 BUG_ON(p != argp->tmpp);
1da177e4
LT		 208 argp->tmpp = NULL;
209 }
210 if (defer_free(argp, kfree, p)) {
a4db5fe5 211 kfree(p);
1da177e4
LT		 212 return NULL;
213 } else
214 return (char *)p;
215}
216
b37ad28b 217static __be32
1da177e4
LT		 218nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
219{
220 u32 bmlen;
221 DECODE_HEAD;
222
223 bmval[0] = 0;
224 bmval[1] = 0;
7e705706 225 bmval[2] = 0;
1da177e4
LT		 226
227 READ_BUF(4);
228 READ32(bmlen);
229 if (bmlen > 1000)
230 goto xdr_error;
231
232 READ_BUF(bmlen << 2);
233 if (bmlen > 0)
234 READ32(bmval[0]);
235 if (bmlen > 1)
236 READ32(bmval[1]);
7e705706
AA		 237 if (bmlen > 2)
238 READ32(bmval[2]);
1da177e4
LT		 239
240 DECODE_TAIL;
241}
242
b37ad28b 243static __be32
3c8e0316 244nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
c0d6fc8a 245 struct iattr *iattr, struct nfs4_acl **acl)
1da177e4
LT		 246{
247 int expected_len, len = 0;
248 u32 dummy32;
249 char *buf;
b8dd7b9a 250 int host_err;
1da177e4
LT		 251
252 DECODE_HEAD;
253 iattr->ia_valid = 0;
254 if ((status = nfsd4_decode_bitmap(argp, bmval)))
255 return status;
256
1da177e4
LT		 257 READ_BUF(4);
258 READ32(expected_len);
259
260 if (bmval[0] & FATTR4_WORD0_SIZE) {
261 READ_BUF(8);
262 len += 8;
263 READ64(iattr->ia_size);
264 iattr->ia_valid |= ATTR_SIZE;
265 }
266 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 267 u32 nace;
28e05dd8 268 struct nfs4_ace *ace;
1da177e4
LT		 269
270 READ_BUF(4); len += 4;
271 READ32(nace);
272
28e05dd8
BF		 273 if (nace > NFS4_ACL_MAX)
274 return nfserr_resource;
275
276 *acl = nfs4_acl_new(nace);
1da177e4 277 if (*acl == NULL) {
b8dd7b9a 278 host_err = -ENOMEM;
1da177e4
LT		 279 goto out_nfserr;
280 }
28e05dd8 281 defer_free(argp, kfree, *acl);
1da177e4 282
28e05dd8
BF		 283 (*acl)->naces = nace;
284 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 285 READ_BUF(16); len += 16;
28e05dd8
BF		 286 READ32(ace->type);
287 READ32(ace->flag);
288 READ32(ace->access_mask);
1da177e4
LT		 289 READ32(dummy32);
290 READ_BUF(dummy32);
291 len += XDR_QUADLEN(dummy32) << 2;
292 READMEM(buf, dummy32);
28e05dd8 293 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 294 status = nfs_ok;
28e05dd8 295 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 296 ;
28e05dd8 297 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 298 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 299 buf, dummy32, &ace->who_gid);
1da177e4 300 else
3c726023 301 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 302 buf, dummy32, &ace->who_uid);
3c726023
BF		 303 if (status)
304 return status;
1da177e4
LT		 305 }
306 } else
307 *acl = NULL;
308 if (bmval[1] & FATTR4_WORD1_MODE) {
309 READ_BUF(4);
310 len += 4;
311 READ32(iattr->ia_mode);
312 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
313 iattr->ia_valid |= ATTR_MODE;
314 }
315 if (bmval[1] & FATTR4_WORD1_OWNER) {
316 READ_BUF(4);
317 len += 4;
318 READ32(dummy32);
319 READ_BUF(dummy32);
320 len += (XDR_QUADLEN(dummy32) << 2);
321 READMEM(buf, dummy32);
47c85291
N		 322 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
323 return status;
1da177e4
LT		 324 iattr->ia_valid |= ATTR_UID;
325 }
326 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
327 READ_BUF(4);
328 len += 4;
329 READ32(dummy32);
330 READ_BUF(dummy32);
331 len += (XDR_QUADLEN(dummy32) << 2);
332 READMEM(buf, dummy32);
47c85291
N		 333 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
334 return status;
1da177e4
LT		 335 iattr->ia_valid |= ATTR_GID;
336 }
337 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
338 READ_BUF(4);
339 len += 4;
340 READ32(dummy32);
341 switch (dummy32) {
342 case NFS4_SET_TO_CLIENT_TIME:
343 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
344 all 32 bits of 'nseconds'. */
345 READ_BUF(12);
346 len += 12;
347 READ32(dummy32);
348 if (dummy32)
349 return nfserr_inval;
350 READ32(iattr->ia_atime.tv_sec);
351 READ32(iattr->ia_atime.tv_nsec);
352 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
353 return nfserr_inval;
354 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
355 break;
356 case NFS4_SET_TO_SERVER_TIME:
357 iattr->ia_valid |= ATTR_ATIME;
358 break;
359 default:
360 goto xdr_error;
361 }
362 }
1da177e4
LT		 363 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
364 READ_BUF(4);
365 len += 4;
366 READ32(dummy32);
367 switch (dummy32) {
368 case NFS4_SET_TO_CLIENT_TIME:
369 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
370 all 32 bits of 'nseconds'. */
371 READ_BUF(12);
372 len += 12;
373 READ32(dummy32);
374 if (dummy32)
375 return nfserr_inval;
376 READ32(iattr->ia_mtime.tv_sec);
377 READ32(iattr->ia_mtime.tv_nsec);
378 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
379 return nfserr_inval;
380 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
381 break;
382 case NFS4_SET_TO_SERVER_TIME:
383 iattr->ia_valid |= ATTR_MTIME;
384 break;
385 default:
386 goto xdr_error;
387 }
388 }
3c8e0316
YZ		 389 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
390 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
391 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
392 READ_BUF(expected_len - len);
393 else if (len != expected_len)
1da177e4
LT		 394 goto xdr_error;
395
396 DECODE_TAIL;
397
398out_nfserr:
b8dd7b9a 399 status = nfserrno(host_err);
1da177e4
LT		 400 goto out;
401}
402
e31a1b66
BH		 403static __be32
404nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
405{
406 DECODE_HEAD;
407
408 READ_BUF(sizeof(stateid_t));
409 READ32(sid->si_generation);
410 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
411
412 DECODE_TAIL;
413}
414
b37ad28b 415static __be32
1da177e4
LT		 416nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
417{
418 DECODE_HEAD;
419
420 READ_BUF(4);
421 READ32(access->ac_req_access);
422
423 DECODE_TAIL;
424}
425
acb2887e
BF		 426static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
427{
428 DECODE_HEAD;
12fc3e92 429 u32 dummy, uid, gid;
acb2887e
BF		 430 char *machine_name;
431 int i;
432 int nr_secflavs;
433
434 /* callback_sec_params4 */
435 READ_BUF(4);
436 READ32(nr_secflavs);
12fc3e92 437 cbs->flavor = (u32)(-1);
acb2887e
BF		 438 for (i = 0; i < nr_secflavs; ++i) {
439 READ_BUF(4);
440 READ32(dummy);
441 switch (dummy) {
442 case RPC_AUTH_NULL:
443 /* Nothing to read */
12fc3e92
BF		 444 if (cbs->flavor == (u32)(-1))
445 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 446 break;
447 case RPC_AUTH_UNIX:
448 READ_BUF(8);
449 /* stamp */
450 READ32(dummy);
451
452 /* machine name */
453 READ32(dummy);
454 READ_BUF(dummy);
455 SAVEMEM(machine_name, dummy);
456
457 /* uid, gid */
458 READ_BUF(8);
12fc3e92
BF		 459 READ32(uid);
460 READ32(gid);
acb2887e
BF		 461
462 /* more gids */
463 READ_BUF(4);
464 READ32(dummy);
465 READ_BUF(dummy * 4);
12fc3e92 466 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 467 kuid_t kuid = make_kuid(&init_user_ns, uid);
468 kgid_t kgid = make_kgid(&init_user_ns, gid);
469 if (uid_valid(kuid) && gid_valid(kgid)) {
470 cbs->uid = kuid;
471 cbs->gid = kgid;
472 cbs->flavor = RPC_AUTH_UNIX;
473 } else {
474 dprintk("RPC_AUTH_UNIX with invalid"
475 "uid or gid ignoring!\n");
476 }
12fc3e92 477 }
acb2887e
BF		 478 break;
479 case RPC_AUTH_GSS:
480 dprintk("RPC_AUTH_GSS callback secflavor "
481 "not supported!\n");
482 READ_BUF(8);
483 /* gcbp_service */
484 READ32(dummy);
485 /* gcbp_handle_from_server */
486 READ32(dummy);
487 READ_BUF(dummy);
488 p += XDR_QUADLEN(dummy);
489 /* gcbp_handle_from_client */
490 READ_BUF(4);
491 READ32(dummy);
492 READ_BUF(dummy);
493 break;
494 default:
495 dprintk("Illegal callback secflavor\n");
496 return nfserr_inval;
497 }
498 }
499 DECODE_TAIL;
500}
501
cb73a9f4
BF		 502static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
503{
504 DECODE_HEAD;
505
506 READ_BUF(4);
507 READ32(bc->bc_cb_program);
508 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
509
510 DECODE_TAIL;
511}
512
1d1bc8f2
BF		 513static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
514{
515 DECODE_HEAD;
1d1bc8f2
BF		 516
517 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
518 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
519 READ32(bcts->dir);
6ce2357f
BS		 520 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
521 * could help us figure out we should be using it. */
1d1bc8f2
BF		 522 DECODE_TAIL;
523}
524
b37ad28b 525static __be32
1da177e4
LT		 526nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
527{
528 DECODE_HEAD;
529
e31a1b66 530 READ_BUF(4);
1da177e4 531 READ32(close->cl_seqid);
e31a1b66 532 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 533
534 DECODE_TAIL;
535}
536
537
b37ad28b 538static __be32
1da177e4
LT		 539nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
540{
541 DECODE_HEAD;
542
543 READ_BUF(12);
544 READ64(commit->co_offset);
545 READ32(commit->co_count);
546
547 DECODE_TAIL;
548}
549
b37ad28b 550static __be32
1da177e4
LT		 551nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
552{
553 DECODE_HEAD;
554
555 READ_BUF(4);
556 READ32(create->cr_type);
557 switch (create->cr_type) {
558 case NF4LNK:
559 READ_BUF(4);
560 READ32(create->cr_linklen);
561 READ_BUF(create->cr_linklen);
562 SAVEMEM(create->cr_linkname, create->cr_linklen);
563 break;
564 case NF4BLK:
565 case NF4CHR:
566 READ_BUF(8);
567 READ32(create->cr_specdata1);
568 READ32(create->cr_specdata2);
569 break;
570 case NF4SOCK:
571 case NF4FIFO:
572 case NF4DIR:
573 default:
574 break;
575 }
576
577 READ_BUF(4);
578 READ32(create->cr_namelen);
579 READ_BUF(create->cr_namelen);
580 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 581 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 582 return status;
583
3c8e0316
YZ		 584 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
585 &create->cr_acl);
c0d6fc8a 586 if (status)
1da177e4
LT		 587 goto out;
588
589 DECODE_TAIL;
590}
591
b37ad28b 592static inline __be32
1da177e4
LT		 593nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
594{
e31a1b66 595 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 596}
597
b37ad28b 598static inline __be32
1da177e4
LT		 599nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
600{
601 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
602}
603
b37ad28b 604static __be32
1da177e4
LT		 605nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
606{
607 DECODE_HEAD;
608
609 READ_BUF(4);
610 READ32(link->li_namelen);
611 READ_BUF(link->li_namelen);
612 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 613 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 614 return status;
615
616 DECODE_TAIL;
617}
618
b37ad28b 619static __be32
1da177e4
LT		 620nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
621{
622 DECODE_HEAD;
623
1da177e4
LT		 624 /*
625 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
626 */
627 READ_BUF(28);
628 READ32(lock->lk_type);
629 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
630 goto xdr_error;
631 READ32(lock->lk_reclaim);
632 READ64(lock->lk_offset);
633 READ64(lock->lk_length);
634 READ32(lock->lk_is_new);
635
636 if (lock->lk_is_new) {
e31a1b66 637 READ_BUF(4);
1da177e4 638 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 639 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
640 if (status)
641 return status;
642 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 643 READ32(lock->lk_new_lock_seqid);
644 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
645 READ32(lock->lk_new_owner.len);
646 READ_BUF(lock->lk_new_owner.len);
647 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
648 } else {
e31a1b66
BH		 649 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
650 if (status)
651 return status;
652 READ_BUF(4);
1da177e4
LT		 653 READ32(lock->lk_old_lock_seqid);
654 }
655
656 DECODE_TAIL;
657}
658
b37ad28b 659static __be32
1da177e4
LT		 660nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
661{
662 DECODE_HEAD;
663
664 READ_BUF(32);
665 READ32(lockt->lt_type);
666 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
667 goto xdr_error;
668 READ64(lockt->lt_offset);
669 READ64(lockt->lt_length);
670 COPYMEM(&lockt->lt_clientid, 8);
671 READ32(lockt->lt_owner.len);
672 READ_BUF(lockt->lt_owner.len);
673 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
674
675 DECODE_TAIL;
676}
677
b37ad28b 678static __be32
1da177e4
LT		 679nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
680{
681 DECODE_HEAD;
682
e31a1b66 683 READ_BUF(8);
1da177e4
LT		 684 READ32(locku->lu_type);
685 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
686 goto xdr_error;
687 READ32(locku->lu_seqid);
e31a1b66
BH		 688 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
689 if (status)
690 return status;
691 READ_BUF(16);
1da177e4
LT		 692 READ64(locku->lu_offset);
693 READ64(locku->lu_length);
694
695 DECODE_TAIL;
696}
697
b37ad28b 698static __be32
1da177e4
LT		 699nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
700{
701 DECODE_HEAD;
702
703 READ_BUF(4);
704 READ32(lookup->lo_len);
705 READ_BUF(lookup->lo_len);
706 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 707 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 708 return status;
709
710 DECODE_TAIL;
711}
712
2c8bd7e0 713static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 714{
715 __be32 *p;
716 u32 w;
717
718 READ_BUF(4);
719 READ32(w);
2c8bd7e0
BH		 720 *share_access = w & NFS4_SHARE_ACCESS_MASK;
721 *deleg_want = w & NFS4_SHARE_WANT_MASK;
722 if (deleg_when)
723 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
724
04f9e664
BF		 725 switch (w & NFS4_SHARE_ACCESS_MASK) {
726 case NFS4_SHARE_ACCESS_READ:
727 case NFS4_SHARE_ACCESS_WRITE:
728 case NFS4_SHARE_ACCESS_BOTH:
729 break;
730 default:
731 return nfserr_bad_xdr;
732 }
fc0d14fe 733 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 734 if (!w)
735 return nfs_ok;
736 if (!argp->minorversion)
737 return nfserr_bad_xdr;
738 switch (w & NFS4_SHARE_WANT_MASK) {
739 case NFS4_SHARE_WANT_NO_PREFERENCE:
740 case NFS4_SHARE_WANT_READ_DELEG:
741 case NFS4_SHARE_WANT_WRITE_DELEG:
742 case NFS4_SHARE_WANT_ANY_DELEG:
743 case NFS4_SHARE_WANT_NO_DELEG:
744 case NFS4_SHARE_WANT_CANCEL:
745 break;
746 default:
747 return nfserr_bad_xdr;
748 }
92bac8c5 749 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 750 if (!w)
751 return nfs_ok;
2c8bd7e0
BH		 752
753 if (!deleg_when) /* open_downgrade */
754 return nfserr_inval;
04f9e664
BF		 755 switch (w) {
756 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
757 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 758 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
759 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 760 return nfs_ok;
761 }
762xdr_error:
763 return nfserr_bad_xdr;
764}
765
766static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
767{
768 __be32 *p;
769
770 READ_BUF(4);
771 READ32(*x);
772 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 773 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 774 return nfserr_bad_xdr;
775 return nfs_ok;
776xdr_error:
777 return nfserr_bad_xdr;
778}
779
a084daf5
BF		 780static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
781{
782 __be32 *p;
783
784 READ_BUF(4);
785 READ32(o->len);
786
787 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
788 return nfserr_bad_xdr;
789
790 READ_BUF(o->len);
791 SAVEMEM(o->data, o->len);
792 return nfs_ok;
793xdr_error:
794 return nfserr_bad_xdr;
795}
796
b37ad28b 797static __be32
1da177e4
LT		 798nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
799{
800 DECODE_HEAD;
2c8bd7e0 801 u32 dummy;
1da177e4
LT		 802
803 memset(open->op_bmval, 0, sizeof(open->op_bmval));
804 open->op_iattr.ia_valid = 0;
fe0750e5 805 open->op_openowner = NULL;
1da177e4
LT		 806
807 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 808 READ_BUF(4);
1da177e4 809 READ32(open->op_seqid);
2c8bd7e0
BH		 810 /* decode, yet ignore deleg_when until supported */
811 status = nfsd4_decode_share_access(argp, &open->op_share_access,
812 &open->op_deleg_want, &dummy);
04f9e664
BF		 813 if (status)
814 goto xdr_error;
815 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
816 if (status)
817 goto xdr_error;
a084daf5 818 READ_BUF(sizeof(clientid_t));
1da177e4 819 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 820 status = nfsd4_decode_opaque(argp, &open->op_owner);
821 if (status)
822 goto xdr_error;
823 READ_BUF(4);
1da177e4
LT		 824 READ32(open->op_create);
825 switch (open->op_create) {
826 case NFS4_OPEN_NOCREATE:
827 break;
828 case NFS4_OPEN_CREATE:
829 READ_BUF(4);
830 READ32(open->op_createmode);
831 switch (open->op_createmode) {
832 case NFS4_CREATE_UNCHECKED:
833 case NFS4_CREATE_GUARDED:
c0d6fc8a 834 status = nfsd4_decode_fattr(argp, open->op_bmval,
3c8e0316 835 &open->op_iattr, &open->op_acl);
c0d6fc8a 836 if (status)
1da177e4
LT		 837 goto out;
838 break;
839 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 840 READ_BUF(NFS4_VERIFIER_SIZE);
841 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 842 break;
79fb54ab
BH		 843 case NFS4_CREATE_EXCLUSIVE4_1:
844 if (argp->minorversion < 1)
845 goto xdr_error;
ab4684d1
CL		 846 READ_BUF(NFS4_VERIFIER_SIZE);
847 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 848 status = nfsd4_decode_fattr(argp, open->op_bmval,
3c8e0316 849 &open->op_iattr, &open->op_acl);
79fb54ab
BH		 850 if (status)
851 goto out;
852 break;
1da177e4
LT		 853 default:
854 goto xdr_error;
855 }
856 break;
857 default:
858 goto xdr_error;
859 }
860
861 /* open_claim */
862 READ_BUF(4);
863 READ32(open->op_claim_type);
864 switch (open->op_claim_type) {
865 case NFS4_OPEN_CLAIM_NULL:
866 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
867 READ_BUF(4);
868 READ32(open->op_fname.len);
869 READ_BUF(open->op_fname.len);
870 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 871 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 872 return status;
873 break;
874 case NFS4_OPEN_CLAIM_PREVIOUS:
875 READ_BUF(4);
876 READ32(open->op_delegate_type);
877 break;
878 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 879 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
880 if (status)
881 return status;
882 READ_BUF(4);
1da177e4
LT		 883 READ32(open->op_fname.len);
884 READ_BUF(open->op_fname.len);
885 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 886 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 887 return status;
888 break;
8b289b2c
BF		 889 case NFS4_OPEN_CLAIM_FH:
890 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
891 if (argp->minorversion < 1)
892 goto xdr_error;
893 /* void */
894 break;
895 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
896 if (argp->minorversion < 1)
897 goto xdr_error;
898 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
899 if (status)
900 return status;
901 break;
1da177e4
LT		 902 default:
903 goto xdr_error;
904 }
905
906 DECODE_TAIL;
907}
908
b37ad28b 909static __be32
1da177e4
LT		 910nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
911{
912 DECODE_HEAD;
913
e31a1b66
BH		 914 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
915 if (status)
916 return status;
917 READ_BUF(4);
1da177e4
LT		 918 READ32(open_conf->oc_seqid);
919
920 DECODE_TAIL;
921}
922
b37ad28b 923static __be32
1da177e4
LT		 924nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
925{
926 DECODE_HEAD;
927
e31a1b66
BH		 928 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
929 if (status)
930 return status;
04f9e664 931 READ_BUF(4);
1da177e4 932 READ32(open_down->od_seqid);
2c8bd7e0
BH		 933 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
934 &open_down->od_deleg_want, NULL);
04f9e664
BF		 935 if (status)
936 return status;
937 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
938 if (status)
939 return status;
1da177e4
LT		 940 DECODE_TAIL;
941}
942
b37ad28b 943static __be32
1da177e4
LT		 944nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
945{
946 DECODE_HEAD;
947
948 READ_BUF(4);
949 READ32(putfh->pf_fhlen);
950 if (putfh->pf_fhlen > NFS4_FHSIZE)
951 goto xdr_error;
952 READ_BUF(putfh->pf_fhlen);
953 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
954
955 DECODE_TAIL;
956}
957
b37ad28b 958static __be32
1da177e4
LT		 959nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
960{
961 DECODE_HEAD;
962
e31a1b66
BH		 963 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
964 if (status)
965 return status;
966 READ_BUF(12);
1da177e4
LT		 967 READ64(read->rd_offset);
968 READ32(read->rd_length);
969
970 DECODE_TAIL;
971}
972
b37ad28b 973static __be32
1da177e4
LT		 974nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
975{
976 DECODE_HEAD;
977
978 READ_BUF(24);
979 READ64(readdir->rd_cookie);
980 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
981 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
982 READ32(readdir->rd_maxcount);
983 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
984 goto out;
985
986 DECODE_TAIL;
987}
988
b37ad28b 989static __be32
1da177e4
LT		 990nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
991{
992 DECODE_HEAD;
993
994 READ_BUF(4);
995 READ32(remove->rm_namelen);
996 READ_BUF(remove->rm_namelen);
997 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 998 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 999 return status;
1000
1001 DECODE_TAIL;
1002}
1003
b37ad28b 1004static __be32
1da177e4
LT		 1005nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1006{
1007 DECODE_HEAD;
1008
1009 READ_BUF(4);
1010 READ32(rename->rn_snamelen);
1011 READ_BUF(rename->rn_snamelen + 4);
1012 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1013 READ32(rename->rn_tnamelen);
1014 READ_BUF(rename->rn_tnamelen);
1015 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1016 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1017 return status;
a36b1725 1018 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1019 return status;
1020
1021 DECODE_TAIL;
1022}
1023
b37ad28b 1024static __be32
1da177e4
LT		 1025nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1026{
1027 DECODE_HEAD;
1028
1029 READ_BUF(sizeof(clientid_t));
1030 COPYMEM(clientid, sizeof(clientid_t));
1031
1032 DECODE_TAIL;
1033}
1034
dcb488a3
AA		 1035static __be32
1036nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1037 struct nfsd4_secinfo *secinfo)
1038{
1039 DECODE_HEAD;
1040
1041 READ_BUF(4);
1042 READ32(secinfo->si_namelen);
1043 READ_BUF(secinfo->si_namelen);
1044 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1045 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1046 if (status)
1047 return status;
1048 DECODE_TAIL;
1049}
1050
04f4ad16
BF		 1051static __be32
1052nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1053 struct nfsd4_secinfo_no_name *sin)
1054{
1055 DECODE_HEAD;
1056
1057 READ_BUF(4);
1058 READ32(sin->sin_style);
1059 DECODE_TAIL;
1060}
1061
b37ad28b 1062static __be32
1da177e4
LT		 1063nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1064{
e31a1b66 1065 __be32 status;
1da177e4 1066
e31a1b66
BH		 1067 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1068 if (status)
1069 return status;
3c8e0316
YZ		 1070 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1071 &setattr->sa_acl);
1da177e4
LT		 1072}
1073
b37ad28b 1074static __be32
1da177e4
LT		 1075nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1076{
1077 DECODE_HEAD;
1078
ab4684d1
CL		 1079 READ_BUF(NFS4_VERIFIER_SIZE);
1080 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1081
a084daf5
BF		 1082 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1083 if (status)
1084 return nfserr_bad_xdr;
1085 READ_BUF(8);
1da177e4
LT		 1086 READ32(setclientid->se_callback_prog);
1087 READ32(setclientid->se_callback_netid_len);
1088
1089 READ_BUF(setclientid->se_callback_netid_len + 4);
1090 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1091 READ32(setclientid->se_callback_addr_len);
1092
1093 READ_BUF(setclientid->se_callback_addr_len + 4);
1094 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1095 READ32(setclientid->se_callback_ident);
1096
1097 DECODE_TAIL;
1098}
1099
b37ad28b 1100static __be32
1da177e4
LT		 1101nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1102{
1103 DECODE_HEAD;
1104
ab4684d1 1105 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1106 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1107 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1108
1109 DECODE_TAIL;
1110}
1111
1112/* Also used for NVERIFY */
b37ad28b 1113static __be32
1da177e4
LT		 1114nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1115{
1da177e4
LT		 1116 DECODE_HEAD;
1117
1118 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1119 goto out;
1120
1121 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1122 * nfsd4_proc_verify */
1123
1da177e4
LT		 1124 READ_BUF(4);
1125 READ32(verify->ve_attrlen);
1126 READ_BUF(verify->ve_attrlen);
1127 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1128
1129 DECODE_TAIL;
1130}
1131
b37ad28b 1132static __be32
1da177e4
LT		 1133nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1134{
1135 int avail;
1da177e4
LT		 1136 int len;
1137 DECODE_HEAD;
1138
e31a1b66
BH		 1139 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1140 if (status)
1141 return status;
1142 READ_BUF(16);
1da177e4
LT		 1143 READ64(write->wr_offset);
1144 READ32(write->wr_stable_how);
1145 if (write->wr_stable_how > 2)
1146 goto xdr_error;
1147 READ32(write->wr_buflen);
1148
1149 /* Sorry .. no magic macros for this.. *
1150 * READ_BUF(write->wr_buflen);
1151 * SAVEMEM(write->wr_buf, write->wr_buflen);
1152 */
1153 avail = (char*)argp->end - (char*)argp->p;
1154 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1155 dprintk("NFSD: xdr error (%s:%d)\n",
1156 __FILE__, __LINE__);
1da177e4
LT		 1157 goto xdr_error;
1158 }
70cc7f75
BF		 1159 write->wr_head.iov_base = p;
1160 write->wr_head.iov_len = avail;
5a80a54d 1161 WARN_ON(avail != (XDR_QUADLEN(avail) << 2));
70cc7f75 1162 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1163
1164 len = XDR_QUADLEN(write->wr_buflen) << 2;
1165 if (len >= avail) {
1166 int pages;
1167
1168 len -= avail;
1169
1170 pages = len >> PAGE_SHIFT;
1171 argp->pagelist += pages;
1172 argp->pagelen -= pages * PAGE_SIZE;
1173 len -= pages * PAGE_SIZE;
1174
1175 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1176 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1177 }
5a80a54d 1178 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1179
1180 DECODE_TAIL;
1181}
1182
b37ad28b 1183static __be32
1da177e4
LT		 1184nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1185{
1186 DECODE_HEAD;
1187
1188 READ_BUF(12);
1189 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1190 READ32(rlockowner->rl_owner.len);
1191 READ_BUF(rlockowner->rl_owner.len);
1192 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1193
60adfc50
AA		 1194 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1195 return nfserr_inval;
1da177e4
LT		 1196 DECODE_TAIL;
1197}
1198
2db134eb
AA		 1199static __be32
1200nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1201 struct nfsd4_exchange_id *exid)
2db134eb 1202{
5afa040b 1203 int dummy, tmp;
0733d213
AA		 1204 DECODE_HEAD;
1205
1206 READ_BUF(NFS4_VERIFIER_SIZE);
1207 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1208
a084daf5
BF		 1209 status = nfsd4_decode_opaque(argp, &exid->clname);
1210 if (status)
1211 return nfserr_bad_xdr;
0733d213
AA		 1212
1213 READ_BUF(4);
1214 READ32(exid->flags);
1215
1216 /* Ignore state_protect4_a */
1217 READ_BUF(4);
1218 READ32(exid->spa_how);
1219 switch (exid->spa_how) {
1220 case SP4_NONE:
1221 break;
1222 case SP4_MACH_CRED:
1223 /* spo_must_enforce */
1224 READ_BUF(4);
1225 READ32(dummy);
1226 READ_BUF(dummy * 4);
1227 p += dummy;
1228
1229 /* spo_must_allow */
1230 READ_BUF(4);
1231 READ32(dummy);
1232 READ_BUF(dummy * 4);
1233 p += dummy;
1234 break;
1235 case SP4_SSV:
1236 /* ssp_ops */
1237 READ_BUF(4);
1238 READ32(dummy);
1239 READ_BUF(dummy * 4);
1240 p += dummy;
1241
1242 READ_BUF(4);
1243 READ32(dummy);
1244 READ_BUF(dummy * 4);
1245 p += dummy;
1246
1247 /* ssp_hash_algs<> */
1248 READ_BUF(4);
5afa040b
MJ		 1249 READ32(tmp);
1250 while (tmp--) {
1251 READ_BUF(4);
1252 READ32(dummy);
1253 READ_BUF(dummy);
1254 p += XDR_QUADLEN(dummy);
1255 }
0733d213
AA		 1256
1257 /* ssp_encr_algs<> */
1258 READ_BUF(4);
5afa040b
MJ		 1259 READ32(tmp);
1260 while (tmp--) {
1261 READ_BUF(4);
1262 READ32(dummy);
1263 READ_BUF(dummy);
1264 p += XDR_QUADLEN(dummy);
1265 }
0733d213
AA		 1266
1267 /* ssp_window and ssp_num_gss_handles */
1268 READ_BUF(8);
1269 READ32(dummy);
1270 READ32(dummy);
1271 break;
1272 default:
1273 goto xdr_error;
1274 }
1275
1276 /* Ignore Implementation ID */
1277 READ_BUF(4); /* nfs_impl_id4 array length */
1278 READ32(dummy);
1279
1280 if (dummy > 1)
1281 goto xdr_error;
1282
1283 if (dummy == 1) {
1284 /* nii_domain */
1285 READ_BUF(4);
1286 READ32(dummy);
1287 READ_BUF(dummy);
1288 p += XDR_QUADLEN(dummy);
1289
1290 /* nii_name */
1291 READ_BUF(4);
1292 READ32(dummy);
1293 READ_BUF(dummy);
1294 p += XDR_QUADLEN(dummy);
1295
1296 /* nii_date */
1297 READ_BUF(12);
1298 p += 3;
1299 }
1300 DECODE_TAIL;
2db134eb
AA		 1301}
1302
1303static __be32
1304nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1305 struct nfsd4_create_session *sess)
1306{
ec6b5d7b 1307 DECODE_HEAD;
ec6b5d7b 1308 u32 dummy;
ec6b5d7b
AA		 1309
1310 READ_BUF(16);
1311 COPYMEM(&sess->clientid, 8);
1312 READ32(sess->seqid);
1313 READ32(sess->flags);
1314
1315 /* Fore channel attrs */
1316 READ_BUF(28);
1317 READ32(dummy); /* headerpadsz is always 0 */
1318 READ32(sess->fore_channel.maxreq_sz);
1319 READ32(sess->fore_channel.maxresp_sz);
1320 READ32(sess->fore_channel.maxresp_cached);
1321 READ32(sess->fore_channel.maxops);
1322 READ32(sess->fore_channel.maxreqs);
1323 READ32(sess->fore_channel.nr_rdma_attrs);
1324 if (sess->fore_channel.nr_rdma_attrs == 1) {
1325 READ_BUF(4);
1326 READ32(sess->fore_channel.rdma_attrs);
1327 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1328 dprintk("Too many fore channel attr bitmaps!\n");
1329 goto xdr_error;
1330 }
1331
1332 /* Back channel attrs */
1333 READ_BUF(28);
1334 READ32(dummy); /* headerpadsz is always 0 */
1335 READ32(sess->back_channel.maxreq_sz);
1336 READ32(sess->back_channel.maxresp_sz);
1337 READ32(sess->back_channel.maxresp_cached);
1338 READ32(sess->back_channel.maxops);
1339 READ32(sess->back_channel.maxreqs);
1340 READ32(sess->back_channel.nr_rdma_attrs);
1341 if (sess->back_channel.nr_rdma_attrs == 1) {
1342 READ_BUF(4);
1343 READ32(sess->back_channel.rdma_attrs);
1344 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1345 dprintk("Too many back channel attr bitmaps!\n");
1346 goto xdr_error;
1347 }
1348
acb2887e 1349 READ_BUF(4);
ec6b5d7b 1350 READ32(sess->callback_prog);
acb2887e 1351 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1352 DECODE_TAIL;
2db134eb
AA		 1353}
1354
1355static __be32
1356nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1357 struct nfsd4_destroy_session *destroy_session)
1358{
e10e0cfc
BH		 1359 DECODE_HEAD;
1360 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1361 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1362
1363 DECODE_TAIL;
2db134eb
AA		 1364}
1365
e1ca12df
BS		 1366static __be32
1367nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1368 struct nfsd4_free_stateid *free_stateid)
1369{
1370 DECODE_HEAD;
1371
1372 READ_BUF(sizeof(stateid_t));
1373 READ32(free_stateid->fr_stateid.si_generation);
1374 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1375
1376 DECODE_TAIL;
1377}
1378
2db134eb
AA		 1379static __be32
1380nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1381 struct nfsd4_sequence *seq)
1382{
b85d4c01
BH		 1383 DECODE_HEAD;
1384
1385 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1386 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1387 READ32(seq->seqid);
1388 READ32(seq->slotid);
1389 READ32(seq->maxslots);
1390 READ32(seq->cachethis);
1391
1392 DECODE_TAIL;
2db134eb
AA		 1393}
1394
17456804
BS		 1395static __be32
1396nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1397{
17456804 1398 int i;
03cfb420
BS		 1399 __be32 *p, status;
1400 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1401
1402 READ_BUF(4);
1403 test_stateid->ts_num_ids = ntohl(*p++);
1404
03cfb420 1405 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1406
1407 for (i = 0; i < test_stateid->ts_num_ids; i++) {
03cfb420
BS		 1408 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1409 if (!stateid) {
afcf6792 1410 status = nfserrno(-ENOMEM);
03cfb420
BS		 1411 goto out;
1412 }
1413
1414 defer_free(argp, kfree, stateid);
1415 INIT_LIST_HEAD(&stateid->ts_id_list);
1416 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1417
1418 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1419 if (status)
03cfb420 1420 goto out;
17456804
BS		 1421 }
1422
1423 status = 0;
1424out:
1425 return status;
1426xdr_error:
1427 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1428 status = nfserr_bad_xdr;
1429 goto out;
1430}
1431
345c2842
MJ		 1432static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1433{
1434 DECODE_HEAD;
1435
1436 READ_BUF(8);
1437 COPYMEM(&dc->clientid, 8);
1438
1439 DECODE_TAIL;
1440}
1441
4dc6ec00
BF		 1442static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1443{
1444 DECODE_HEAD;
1445
1446 READ_BUF(4);
1447 READ32(rc->rca_one_fs);
1448
1449 DECODE_TAIL;
1450}
1451
347e0ad9
BH		 1452static __be32
1453nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1454{
1455 return nfs_ok;
1456}
1457
3c375c6f
BH		 1458static __be32
1459nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1460{
1e685ec2 1461 return nfserr_notsupp;
3c375c6f
BH		 1462}
1463
347e0ad9
BH		 1464typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1465
1466static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1467 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1468 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1469 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1470 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1471 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1472 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1473 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1474 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1475 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1476 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1477 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1478 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1479 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1480 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1481 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1482 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1483 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1484 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1485 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1486 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
a1c8c4d1 1487 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
ad1060c8
BF		 1488 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1489 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1490 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1491 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1492 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1493 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1494 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1495 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1496 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1497 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1498 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1499 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1500 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1501 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1502 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1503 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
347e0ad9
BH		 1504};
1505
2db134eb 1506static nfsd4_dec nfsd41_dec_ops[] = {
9064caae
RD		 1507 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1508 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1509 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1510 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1511 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1512 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1513 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1514 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1515 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1516 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1517 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1518 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1519 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1520 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1521 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1522 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1523 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1524 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1525 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1526 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1527 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1528 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1529 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1530 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1531 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1532 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1533 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1534 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1535 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1536 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1537 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1538 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1539 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1540 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1541 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1542 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1543 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
2db134eb
AA		 1544
1545 /* new operations for NFSv4.1 */
cb73a9f4 1546 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1547 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1548 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1549 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1550 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1551 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1552 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1553 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1554 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1555 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1556 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1557 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1558 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1559 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1560 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1561 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1562 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1563 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1564 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1565};
1566
f2feb96b
BH		 1567struct nfsd4_minorversion_ops {
1568 nfsd4_dec *decoders;
1569 int nops;
1570};
1571
1572static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
ad1060c8 1573 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
2db134eb 1574 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
f2feb96b
BH		 1575};
1576
b37ad28b 1577static __be32
1da177e4
LT		 1578nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1579{
1580 DECODE_HEAD;
1581 struct nfsd4_op *op;
f2feb96b 1582 struct nfsd4_minorversion_ops *ops;
1091006c 1583 bool cachethis = false;
1da177e4
LT		 1584 int i;
1585
1da177e4
LT		 1586 READ_BUF(4);
1587 READ32(argp->taglen);
1588 READ_BUF(argp->taglen + 8);
1589 SAVEMEM(argp->tag, argp->taglen);
1590 READ32(argp->minorversion);
1591 READ32(argp->opcnt);
1592
1593 if (argp->taglen > NFSD4_MAX_TAGLEN)
1594 goto xdr_error;
1595 if (argp->opcnt > 100)
1596 goto xdr_error;
1597
e8c96f8c 1598 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1599 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1600 if (!argp->ops) {
1601 argp->ops = argp->iops;
817cb9d4 1602 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1603 goto xdr_error;
1604 }
1605 }
1606
f2feb96b 1607 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
30cff1ff
BH		 1608 argp->opcnt = 0;
1609
f2feb96b 1610 ops = &nfsd4_minorversion[argp->minorversion];
1da177e4
LT		 1611 for (i = 0; i < argp->opcnt; i++) {
1612 op = &argp->ops[i];
1613 op->replay = NULL;
1614
8a61b18c
BF		 1615 READ_BUF(4);
1616 READ32(op->opnum);
1da177e4 1617
de3cab79 1618 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
f2feb96b 1619 op->status = ops->decoders[op->opnum](argp, &op->u);
347e0ad9 1620 else {
1da177e4
LT		 1621 op->opnum = OP_ILLEGAL;
1622 op->status = nfserr_op_illegal;
1da177e4
LT		 1623 }
1624
1625 if (op->status) {
1626 argp->opcnt = i+1;
1627 break;
1628 }
1091006c
BF		 1629 /*
1630 * We'll try to cache the result in the DRC if any one
1631 * op in the compound wants to be cached:
1632 */
1633 cachethis |= nfsd4_cache_this_op(op);
1da177e4 1634 }
1091006c
BF		 1635 /* Sessions make the DRC unnecessary: */
1636 if (argp->minorversion)
1637 cachethis = false;
1638 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4
LT		 1639
1640 DECODE_TAIL;
1641}
1da177e4 1642
1da177e4
LT		 1643#define WRITE32(n) *p++ = htonl(n)
1644#define WRITE64(n) do { \
1645 *p++ = htonl((u32)((n) >> 32)); \
1646 *p++ = htonl((u32)(n)); \
1647} while (0)
5108b276 1648#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1649 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1650 memcpy(p, ptr, nbytes); \
1651 p += XDR_QUADLEN(nbytes); \
5108b276 1652}} while (0)
c654b8a9
BF		 1653
1654static void write32(__be32 **p, u32 n)
1655{
45eaa1c1 1656 *(*p)++ = htonl(n);
c654b8a9
BF		 1657}
1658
1659static void write64(__be32 **p, u64 n)
1660{
45eaa1c1 1661 write32(p, (n >> 32));
c654b8a9
BF		 1662 write32(p, (u32)n);
1663}
1664
1665static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1666{
1667 if (IS_I_VERSION(inode)) {
1668 write64(p, inode->i_version);
1669 } else {
1670 write32(p, stat->ctime.tv_sec);
1671 write32(p, stat->ctime.tv_nsec);
1672 }
1673}
1674
1675static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1676{
1677 write32(p, c->atomic);
1678 if (c->change_supported) {
1679 write64(p, c->before_change);
1680 write64(p, c->after_change);
1681 } else {
1682 write32(p, c->before_ctime_sec);
1683 write32(p, c->before_ctime_nsec);
1684 write32(p, c->after_ctime_sec);
1685 write32(p, c->after_ctime_nsec);
1686 }
1687}
1da177e4
LT		 1688
1689#define RESERVE_SPACE(nbytes) do { \
1690 p = resp->p; \
1691 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1692} while (0)
1693#define ADJUST_ARGS() resp->p = p
1694
1695/*
1696 * Header routine to setup seqid operation replay cache
1697 */
1698#define ENCODE_SEQID_OP_HEAD \
2ebbc012 1699 __be32 *save; \
1da177e4
LT		 1700 \
1701 save = resp->p;
1702
1703/*
7fb64cee
N		 1704 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1705 * is where sequence id's are incremented, and the replay cache is filled.
1706 * Note that we increment sequence id's here, at the last moment, so we're sure
1707 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1708 */
1709
f3e42237
BF		 1710static void encode_seqid_op_tail(struct nfsd4_compoundres *resp, __be32 *save, __be32 nfserr)
1711{
1712 struct nfs4_stateowner *stateowner = resp->cstate.replay_owner;
1713
1714 if (seqid_mutating_err(ntohl(nfserr)) && stateowner) {
1715 stateowner->so_seqid++;
1716 stateowner->so_replay.rp_status = nfserr;
1717 stateowner->so_replay.rp_buflen =
1718 (char *)resp->p - (char *)save;
1719 memcpy(stateowner->so_replay.rp_buf, save,
1720 stateowner->so_replay.rp_buflen);
38c387b5 1721 nfsd4_purge_closed_stateid(stateowner);
f3e42237
BF		 1722 }
1723}
1da177e4 1724
81c3f413 1725/* Encode as an array of strings the string given with components
e7a0444a 1726 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1727 */
e7a0444a
WAA		 1728static __be32 nfsd4_encode_components_esc(char sep, char *components,
1729 __be32 **pp, int *buflen,
1730 char esc_enter, char esc_exit)
81c3f413 1731{
2ebbc012
AV		 1732 __be32 *p = *pp;
1733 __be32 *countp = p;
81c3f413 1734 int strlen, count=0;
e7a0444a 1735 char *str, *end, *next;
81c3f413
BF		 1736
1737 dprintk("nfsd4_encode_components(%s)\n", components);
1738 if ((*buflen -= 4) < 0)
1739 return nfserr_resource;
1740 WRITE32(0); /* We will fill this in with @count later */
1741 end = str = components;
1742 while (*end) {
e7a0444a
WAA		 1743 bool found_esc = false;
1744
1745 /* try to parse as esc_start, ..., esc_end, sep */
1746 if (*str == esc_enter) {
1747 for (; *end && (*end != esc_exit); end++)
1748 /* find esc_exit or end of string */;
1749 next = end + 1;
1750 if (*end && (!*next || *next == sep)) {
1751 str++;
1752 found_esc = true;
1753 }
1754 }
1755
1756 if (!found_esc)
1757 for (; *end && (*end != sep); end++)
1758 /* find sep or end of string */;
1759
81c3f413
BF		 1760 strlen = end - str;
1761 if (strlen) {
1762 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1763 return nfserr_resource;
1764 WRITE32(strlen);
1765 WRITEMEM(str, strlen);
1766 count++;
1767 }
1768 else
1769 end++;
1770 str = end;
1771 }
1772 *pp = p;
1773 p = countp;
1774 WRITE32(count);
1775 return 0;
1776}
1777
e7a0444a
WAA		 1778/* Encode as an array of strings the string given with components
1779 * separated @sep.
1780 */
1781static __be32 nfsd4_encode_components(char sep, char *components,
1782 __be32 **pp, int *buflen)
1783{
1784 return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
1785}
1786
81c3f413
BF		 1787/*
1788 * encode a location element of a fs_locations structure
1789 */
b37ad28b 1790static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1791 __be32 **pp, int *buflen)
81c3f413 1792{
b37ad28b 1793 __be32 status;
2ebbc012 1794 __be32 *p = *pp;
81c3f413 1795
e7a0444a
WAA		 1796 status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
1797 '[', ']');
81c3f413
BF		 1798 if (status)
1799 return status;
1800 status = nfsd4_encode_components('/', location->path, &p, buflen);
1801 if (status)
1802 return status;
1803 *pp = p;
1804 return 0;
1805}
1806
1807/*
ed748aac 1808 * Encode a path in RFC3530 'pathname4' format
81c3f413 1809 */
ed748aac
TM		 1810static __be32 nfsd4_encode_path(const struct path *root,
1811 const struct path *path, __be32 **pp, int *buflen)
81c3f413 1812{
ed748aac
TM		 1813 struct path cur = {
1814 .mnt = path->mnt,
1815 .dentry = path->dentry,
1816 };
1817 __be32 *p = *pp;
1818 struct dentry **components = NULL;
1819 unsigned int ncomponents = 0;
1820 __be32 err = nfserr_jukebox;
81c3f413 1821
ed748aac 1822 dprintk("nfsd4_encode_components(");
81c3f413 1823
ed748aac
TM		 1824 path_get(&cur);
1825 /* First walk the path up to the nfsd root, and store the
1826 * dentries/path components in an array.
1827 */
1828 for (;;) {
1829 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1830 break;
1831 if (cur.dentry == cur.mnt->mnt_root) {
1832 if (follow_up(&cur))
1833 continue;
1834 goto out_free;
1835 }
1836 if ((ncomponents & 15) == 0) {
1837 struct dentry **new;
1838 new = krealloc(components,
1839 sizeof(*new) * (ncomponents + 16),
1840 GFP_KERNEL);
1841 if (!new)
1842 goto out_free;
1843 components = new;
1844 }
1845 components[ncomponents++] = cur.dentry;
1846 cur.dentry = dget_parent(cur.dentry);
1847 }
81c3f413 1848
ed748aac
TM		 1849 *buflen -= 4;
1850 if (*buflen < 0)
1851 goto out_free;
1852 WRITE32(ncomponents);
1853
1854 while (ncomponents) {
1855 struct dentry *dentry = components[ncomponents - 1];
1856 unsigned int len = dentry->d_name.len;
1857
1858 *buflen -= 4 + (XDR_QUADLEN(len) << 2);
1859 if (*buflen < 0)
1860 goto out_free;
1861 WRITE32(len);
1862 WRITEMEM(dentry->d_name.name, len);
1863 dprintk("/%s", dentry->d_name.name);
1864 dput(dentry);
1865 ncomponents--;
81c3f413 1866 }
ed748aac
TM		 1867
1868 *pp = p;
1869 err = 0;
1870out_free:
1871 dprintk(")\n");
1872 while (ncomponents)
1873 dput(components[--ncomponents]);
1874 kfree(components);
1875 path_put(&cur);
1876 return err;
1877}
1878
1879static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
1880 const struct path *path, __be32 **pp, int *buflen)
1881{
1882 struct svc_export *exp_ps;
1883 __be32 res;
1884
1885 exp_ps = rqst_find_fsidzero_export(rqstp);
1886 if (IS_ERR(exp_ps))
1887 return nfserrno(PTR_ERR(exp_ps));
1888 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
1889 exp_put(exp_ps);
1890 return res;
81c3f413
BF		 1891}
1892
1893/*
1894 * encode a fs_locations structure
1895 */
b37ad28b 1896static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1897 struct svc_export *exp,
2ebbc012 1898 __be32 **pp, int *buflen)
81c3f413 1899{
b37ad28b 1900 __be32 status;
cc45f017 1901 int i;
2ebbc012 1902 __be32 *p = *pp;
81c3f413 1903 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1904
ed748aac 1905 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
81c3f413
BF		 1906 if (status)
1907 return status;
1908 if ((*buflen -= 4) < 0)
1909 return nfserr_resource;
1910 WRITE32(fslocs->locations_count);
1911 for (i=0; i<fslocs->locations_count; i++) {
1912 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1913 &p, buflen);
1914 if (status)
1915 return status;
1916 }
1917 *pp = p;
1918 return 0;
1919}
1da177e4 1920
3d2544b1
BF		 1921static u32 nfs4_file_type(umode_t mode)
1922{
1923 switch (mode & S_IFMT) {
1924 case S_IFIFO: return NF4FIFO;
1925 case S_IFCHR: return NF4CHR;
1926 case S_IFDIR: return NF4DIR;
1927 case S_IFBLK: return NF4BLK;
1928 case S_IFLNK: return NF4LNK;
1929 case S_IFREG: return NF4REG;
1930 case S_IFSOCK: return NF4SOCK;
1931 default: return NF4BAD;
1932 };
1933}
1da177e4 1934
b37ad28b 1935static __be32
ab8e4aee 1936nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, kuid_t uid, kgid_t gid,
2ebbc012 1937 __be32 **p, int *buflen)
1da177e4
LT		 1938{
1939 int status;
1940
1941 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1942 return nfserr_resource;
1943 if (whotype != NFS4_ACL_WHO_NAMED)
1944 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
ab8e4aee
EB		 1945 else if (gid_valid(gid))
1946 status = nfsd_map_gid_to_name(rqstp, gid, (u8 *)(*p + 1));
1da177e4 1947 else
ab8e4aee 1948 status = nfsd_map_uid_to_name(rqstp, uid, (u8 *)(*p + 1));
1da177e4
LT		 1949 if (status < 0)
1950 return nfserrno(status);
1951 *p = xdr_encode_opaque(*p, NULL, status);
1952 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1953 BUG_ON(*buflen < 0);
1954 return 0;
1955}
1956
b37ad28b 1957static inline __be32
ab8e4aee 1958nfsd4_encode_user(struct svc_rqst *rqstp, kuid_t user, __be32 **p, int *buflen)
1da177e4 1959{
ab8e4aee
EB		 1960 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, user, INVALID_GID,
1961 p, buflen);
1da177e4
LT		 1962}
1963
b37ad28b 1964static inline __be32
ab8e4aee 1965nfsd4_encode_group(struct svc_rqst *rqstp, kgid_t group, __be32 **p, int *buflen)
1da177e4 1966{
ab8e4aee
EB		 1967 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, INVALID_UID, group,
1968 p, buflen);
1da177e4
LT		 1969}
1970
b37ad28b 1971static inline __be32
ab8e4aee 1972nfsd4_encode_aclname(struct svc_rqst *rqstp, struct nfs4_ace *ace,
2ebbc012 1973 __be32 **p, int *buflen)
1da177e4 1974{
ab8e4aee
EB		 1975 kuid_t uid = INVALID_UID;
1976 kgid_t gid = INVALID_GID;
1977
1978 if (ace->whotype == NFS4_ACL_WHO_NAMED) {
1979 if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
1980 gid = ace->who_gid;
1981 else
1982 uid = ace->who_uid;
1983 }
1984 return nfsd4_encode_name(rqstp, ace->whotype, uid, gid, p, buflen);
1da177e4
LT		 1985}
1986
42ca0993
BF		 1987#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1988 FATTR4_WORD0_RDATTR_ERROR)
1989#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1990
b37ad28b 1991static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1992{
1993 /* As per referral draft: */
1994 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1995 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1996 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1997 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1998 *rdattr_err = NFSERR_MOVED;
1999 else
2000 return nfserr_moved;
2001 }
2002 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2003 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2004 return 0;
2005}
1da177e4 2006
ae7095a7
BF		 2007
2008static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2009{
2010 struct path path = exp->ex_path;
2011 int err;
2012
2013 path_get(&path);
2014 while (follow_up(&path)) {
2015 if (path.dentry != path.mnt->mnt_root)
2016 break;
2017 }
3dadecce 2018 err = vfs_getattr(&path, stat);
ae7095a7
BF		 2019 path_put(&path);
2020 return err;
2021}
2022
1da177e4
LT		 2023/*
2024 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2025 * ourselves.
2026 *
84822d0b 2027 * countp is the buffer size in _words_
1da177e4 2028 */
b37ad28b 2029__be32
1da177e4 2030nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
84822d0b 2031 struct dentry *dentry, __be32 **buffer, int count, u32 *bmval,
406a7ea9 2032 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2033{
2034 u32 bmval0 = bmval[0];
2035 u32 bmval1 = bmval[1];
7e705706 2036 u32 bmval2 = bmval[2];
1da177e4
LT		 2037 struct kstat stat;
2038 struct svc_fh tempfh;
2039 struct kstatfs statfs;
84822d0b 2040 int buflen = count << 2;
2ebbc012 2041 __be32 *attrlenp;
1da177e4
LT		 2042 u32 dummy;
2043 u64 dummy64;
42ca0993 2044 u32 rdattr_err = 0;
84822d0b 2045 __be32 *p = *buffer;
b37ad28b 2046 __be32 status;
b8dd7b9a 2047 int err;
1da177e4
LT		 2048 int aclsupport = 0;
2049 struct nfs4_acl *acl = NULL;
7e705706
AA		 2050 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2051 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2052 struct path path = {
2053 .mnt = exp->ex_path.mnt,
2054 .dentry = dentry,
2055 };
3d733711 2056 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2057
2058 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2059 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2060 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2061 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2062
42ca0993 2063 if (exp->ex_fslocs.migrated) {
7e705706 2064 BUG_ON(bmval[2]);
42ca0993
BF		 2065 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2066 if (status)
2067 goto out;
2068 }
2069
3dadecce 2070 err = vfs_getattr(&path, &stat);
b8dd7b9a 2071 if (err)
1da177e4 2072 goto out_nfserr;
a16e92ed
BF		 2073 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2074 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2075 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2076 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2077 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2078 if (err)
1da177e4
LT		 2079 goto out_nfserr;
2080 }
2081 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2082 fh_init(&tempfh, NFS4_FHSIZE);
2083 status = fh_compose(&tempfh, exp, dentry, NULL);
2084 if (status)
2085 goto out;
2086 fhp = &tempfh;
2087 }
2088 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2089 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2090 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2091 aclsupport = (err == 0);
1da177e4 2092 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2093 if (err == -EOPNOTSUPP)
1da177e4 2094 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2095 else if (err == -EINVAL) {
1da177e4
LT		 2096 status = nfserr_attrnotsupp;
2097 goto out;
b8dd7b9a 2098 } else if (err != 0)
1da177e4
LT		 2099 goto out_nfserr;
2100 }
2101 }
1da177e4 2102
2b44f1ba
BH		 2103 if (bmval2) {
2104 if ((buflen -= 16) < 0)
2105 goto out_resource;
7e705706
AA		 2106 WRITE32(3);
2107 WRITE32(bmval0);
2108 WRITE32(bmval1);
2109 WRITE32(bmval2);
2b44f1ba
BH		 2110 } else if (bmval1) {
2111 if ((buflen -= 12) < 0)
2112 goto out_resource;
7e705706
AA		 2113 WRITE32(2);
2114 WRITE32(bmval0);
2115 WRITE32(bmval1);
2116 } else {
2b44f1ba
BH		 2117 if ((buflen -= 8) < 0)
2118 goto out_resource;
7e705706
AA		 2119 WRITE32(1);
2120 WRITE32(bmval0);
2121 }
1da177e4
LT		 2122 attrlenp = p++; /* to be backfilled later */
2123
2124 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2125 u32 word0 = nfsd_suppattrs0(minorversion);
2126 u32 word1 = nfsd_suppattrs1(minorversion);
2127 u32 word2 = nfsd_suppattrs2(minorversion);
2128
42ca0993
BF		 2129 if (!aclsupport)
2130 word0 &= ~FATTR4_WORD0_ACL;
7e705706 2131 if (!word2) {
2b44f1ba
BH		 2132 if ((buflen -= 12) < 0)
2133 goto out_resource;
7e705706
AA		 2134 WRITE32(2);
2135 WRITE32(word0);
2136 WRITE32(word1);
2137 } else {
2b44f1ba
BH		 2138 if ((buflen -= 16) < 0)
2139 goto out_resource;
7e705706
AA		 2140 WRITE32(3);
2141 WRITE32(word0);
2142 WRITE32(word1);
2143 WRITE32(word2);
2144 }
1da177e4
LT		 2145 }
2146 if (bmval0 & FATTR4_WORD0_TYPE) {
2147 if ((buflen -= 4) < 0)
2148 goto out_resource;
3d2544b1 2149 dummy = nfs4_file_type(stat.mode);
1da177e4
LT		 2150 if (dummy == NF4BAD)
2151 goto out_serverfault;
2152 WRITE32(dummy);
2153 }
2154 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2155 if ((buflen -= 4) < 0)
2156 goto out_resource;
49640001 2157 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 2158 WRITE32(NFS4_FH_PERSISTENT);
49640001 2159 else
e34ac862 2160 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 2161 }
2162 if (bmval0 & FATTR4_WORD0_CHANGE) {
1da177e4
LT		 2163 if ((buflen -= 8) < 0)
2164 goto out_resource;
c654b8a9 2165 write_change(&p, &stat, dentry->d_inode);
1da177e4
LT		 2166 }
2167 if (bmval0 & FATTR4_WORD0_SIZE) {
2168 if ((buflen -= 8) < 0)
2169 goto out_resource;
2170 WRITE64(stat.size);
2171 }
2172 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2173 if ((buflen -= 4) < 0)
2174 goto out_resource;
2175 WRITE32(1);
2176 }
2177 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2178 if ((buflen -= 4) < 0)
2179 goto out_resource;
2180 WRITE32(1);
2181 }
2182 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2183 if ((buflen -= 4) < 0)
2184 goto out_resource;
2185 WRITE32(0);
2186 }
2187 if (bmval0 & FATTR4_WORD0_FSID) {
2188 if ((buflen -= 16) < 0)
2189 goto out_resource;
42ca0993
BF		 2190 if (exp->ex_fslocs.migrated) {
2191 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2192 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2193 } else switch(fsid_source(fhp)) {
2194 case FSIDSOURCE_FSID:
1da177e4
LT		 2195 WRITE64((u64)exp->ex_fsid);
2196 WRITE64((u64)0);
af6a4e28
N		 2197 break;
2198 case FSIDSOURCE_DEV:
1da177e4
LT		 2199 WRITE32(0);
2200 WRITE32(MAJOR(stat.dev));
2201 WRITE32(0);
2202 WRITE32(MINOR(stat.dev));
af6a4e28
N		 2203 break;
2204 case FSIDSOURCE_UUID:
2205 WRITEMEM(exp->ex_uuid, 16);
2206 break;
1da177e4
LT		 2207 }
2208 }
2209 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2210 if ((buflen -= 4) < 0)
2211 goto out_resource;
2212 WRITE32(0);
2213 }
2214 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2215 if ((buflen -= 4) < 0)
2216 goto out_resource;
3d733711 2217 WRITE32(nn->nfsd4_lease);
1da177e4
LT		 2218 }
2219 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2220 if ((buflen -= 4) < 0)
2221 goto out_resource;
42ca0993 2222 WRITE32(rdattr_err);
1da177e4
LT		 2223 }
2224 if (bmval0 & FATTR4_WORD0_ACL) {
2225 struct nfs4_ace *ace;
1da177e4
LT		 2226
2227 if (acl == NULL) {
2228 if ((buflen -= 4) < 0)
2229 goto out_resource;
2230
2231 WRITE32(0);
2232 goto out_acl;
2233 }
2234 if ((buflen -= 4) < 0)
2235 goto out_resource;
2236 WRITE32(acl->naces);
2237
28e05dd8 2238 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 2239 if ((buflen -= 4*3) < 0)
2240 goto out_resource;
2241 WRITE32(ace->type);
2242 WRITE32(ace->flag);
2243 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
ab8e4aee 2244 status = nfsd4_encode_aclname(rqstp, ace, &p, &buflen);
1da177e4
LT		 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 2448 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
84822d0b 2449 *buffer = p;
1da177e4
LT		 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:
1da177e4
LT		 2461 status = nfserr_resource;
2462 goto out;
2463out_serverfault:
2464 status = nfserr_serverfault;
2465 goto out;
2466}
2467
c0ce6ec8
BF		 2468static inline int attributes_need_mount(u32 *bmval)
2469{
2470 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2471 return 1;
2472 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2473 return 1;
2474 return 0;
2475}
2476
b37ad28b 2477static __be32
1da177e4 2478nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
84822d0b 2479 const char *name, int namlen, __be32 **p, int buflen)
1da177e4
LT		 2480{
2481 struct svc_export *exp = cd->rd_fhp->fh_export;
2482 struct dentry *dentry;
b37ad28b 2483 __be32 nfserr;
406a7ea9 2484 int ignore_crossmnt = 0;
1da177e4
LT		 2485
2486 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2487 if (IS_ERR(dentry))
2488 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2489 if (!dentry->d_inode) {
2490 /*
2491 * nfsd_buffered_readdir drops the i_mutex between
2492 * readdir and calling this callback, leaving a window
2493 * where this directory entry could have gone away.
2494 */
2495 dput(dentry);
2496 return nfserr_noent;
2497 }
1da177e4
LT		 2498
2499 exp_get(exp);
406a7ea9
FF		 2500 /*
2501 * In the case of a mountpoint, the client may be asking for
2502 * attributes that are only properties of the underlying filesystem
2503 * as opposed to the cross-mounted file system. In such a case,
2504 * we will not follow the cross mount and will fill the attribtutes
2505 * directly from the mountpoint dentry.
2506 */
3227fa41 2507 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2508 int err;
2509
3227fa41
BF		 2510 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2511 && !attributes_need_mount(cd->rd_bmval)) {
2512 ignore_crossmnt = 1;
2513 goto out_encode;
2514 }
dcb488a3
AA		 2515 /*
2516 * Why the heck aren't we just using nfsd_lookup??
2517 * Different "."/".." handling? Something else?
2518 * At least, add a comment here to explain....
2519 */
021d3a72
BF		 2520 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2521 if (err) {
2522 nfserr = nfserrno(err);
1da177e4
LT		 2523 goto out_put;
2524 }
dcb488a3
AA		 2525 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2526 if (nfserr)
2527 goto out_put;
1da177e4
LT		 2528
2529 }
3227fa41 2530out_encode:
1da177e4 2531 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 2532 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2533out_put:
2534 dput(dentry);
2535 exp_put(exp);
2536 return nfserr;
2537}
2538
2ebbc012 2539static __be32 *
b37ad28b 2540nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2541{
2ebbc012 2542 __be32 *attrlenp;
1da177e4
LT		 2543
2544 if (buflen < 6)
2545 return NULL;
2546 *p++ = htonl(2);
2547 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2548 *p++ = htonl(0); /* bmval1 */
2549
2550 attrlenp = p++;
2551 *p++ = nfserr; /* no htonl */
2552 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2553 return p;
2554}
2555
2556static int
a0ad13ef
N		 2557nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2558 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2559{
a0ad13ef 2560 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2561 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2562 int buflen;
2ebbc012 2563 __be32 *p = cd->buffer;
b2c0cea6 2564 __be32 *cookiep;
b37ad28b 2565 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2566
2567 /* In nfsv4, "." and ".." never make it onto the wire.. */
2568 if (name && isdotent(name, namlen)) {
2569 cd->common.err = nfs_ok;
2570 return 0;
2571 }
2572
2573 if (cd->offset)
2574 xdr_encode_hyper(cd->offset, (u64) offset);
2575
2576 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2577 if (buflen < 0)
2578 goto fail;
2579
2580 *p++ = xdr_one; /* mark entry present */
b2c0cea6 2581 cookiep = p;
1da177e4
LT		 2582 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2583 p = xdr_encode_array(p, name, namlen); /* name length & name */
2584
84822d0b 2585 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, &p, buflen);
1da177e4
LT		 2586 switch (nfserr) {
2587 case nfs_ok:
1da177e4
LT		 2588 break;
2589 case nfserr_resource:
2590 nfserr = nfserr_toosmall;
2591 goto fail;
b2c0cea6
BF		 2592 case nfserr_noent:
2593 goto skip_entry;
1da177e4
LT		 2594 default:
2595 /*
2596 * If the client requested the RDATTR_ERROR attribute,
2597 * we stuff the error code into this attribute
2598 * and continue. If this attribute was not requested,
2599 * then in accordance with the spec, we fail the
2600 * entire READDIR operation(!)
2601 */
2602 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2603 goto fail;
1da177e4 2604 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2605 if (p == NULL) {
2606 nfserr = nfserr_toosmall;
1da177e4 2607 goto fail;
34081efc 2608 }
1da177e4
LT		 2609 }
2610 cd->buflen -= (p - cd->buffer);
2611 cd->buffer = p;
b2c0cea6
BF		 2612 cd->offset = cookiep;
2613skip_entry:
1da177e4
LT		 2614 cd->common.err = nfs_ok;
2615 return 0;
2616fail:
2617 cd->common.err = nfserr;
2618 return -EINVAL;
2619}
2620
e2f282b9
BH		 2621static void
2622nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2623{
bc749ca4 2624 __be32 *p;
e2f282b9
BH		 2625
2626 RESERVE_SPACE(sizeof(stateid_t));
2627 WRITE32(sid->si_generation);
2628 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2629 ADJUST_ARGS();
2630}
2631
695e12f8 2632static __be32
b37ad28b 2633nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2634{
bc749ca4 2635 __be32 *p;
1da177e4
LT		 2636
2637 if (!nfserr) {
2638 RESERVE_SPACE(8);
2639 WRITE32(access->ac_supported);
2640 WRITE32(access->ac_resp_access);
2641 ADJUST_ARGS();
2642 }
695e12f8 2643 return nfserr;
1da177e4
LT		 2644}
2645
1d1bc8f2
BF		 2646static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2647{
2648 __be32 *p;
2649
2650 if (!nfserr) {
2651 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2652 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2653 WRITE32(bcts->dir);
6e67b5d1 2654 /* Sorry, we do not yet support RDMA over 4.1: */
1d1bc8f2
BF		 2655 WRITE32(0);
2656 ADJUST_ARGS();
2657 }
2658 return nfserr;
2659}
2660
695e12f8 2661static __be32
b37ad28b 2662nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4
LT		 2663{
2664 ENCODE_SEQID_OP_HEAD;
2665
e2f282b9
BH		 2666 if (!nfserr)
2667 nfsd4_encode_stateid(resp, &close->cl_stateid);
2668
f3e42237 2669 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2670 return nfserr;
1da177e4
LT		 2671}
2672
2673
695e12f8 2674static __be32
b37ad28b 2675nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2676{
bc749ca4 2677 __be32 *p;
1da177e4
LT		 2678
2679 if (!nfserr) {
ab4684d1
CL		 2680 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
2681 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 2682 ADJUST_ARGS();
2683 }
695e12f8 2684 return nfserr;
1da177e4
LT		 2685}
2686
695e12f8 2687static __be32
b37ad28b 2688nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2689{
bc749ca4 2690 __be32 *p;
1da177e4
LT		 2691
2692 if (!nfserr) {
2693 RESERVE_SPACE(32);
c654b8a9 2694 write_cinfo(&p, &create->cr_cinfo);
1da177e4
LT		 2695 WRITE32(2);
2696 WRITE32(create->cr_bmval[0]);
2697 WRITE32(create->cr_bmval[1]);
2698 ADJUST_ARGS();
2699 }
695e12f8 2700 return nfserr;
1da177e4
LT		 2701}
2702
b37ad28b
AV		 2703static __be32
2704nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2705{
2706 struct svc_fh *fhp = getattr->ga_fhp;
2707 int buflen;
2708
2709 if (nfserr)
2710 return nfserr;
2711
2712 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2713 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
84822d0b 2714 &resp->p, buflen, getattr->ga_bmval,
406a7ea9 2715 resp->rqstp, 0);
1da177e4
LT		 2716 return nfserr;
2717}
2718
695e12f8
BH		 2719static __be32
2720nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2721{
695e12f8 2722 struct svc_fh *fhp = *fhpp;
1da177e4 2723 unsigned int len;
bc749ca4 2724 __be32 *p;
1da177e4
LT		 2725
2726 if (!nfserr) {
2727 len = fhp->fh_handle.fh_size;
2728 RESERVE_SPACE(len + 4);
2729 WRITE32(len);
2730 WRITEMEM(&fhp->fh_handle.fh_base, len);
2731 ADJUST_ARGS();
2732 }
695e12f8 2733 return nfserr;
1da177e4
LT		 2734}
2735
2736/*
2737* Including all fields other than the name, a LOCK4denied structure requires
2738* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2739*/
2740static void
2741nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2742{
7c13f344 2743 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2744 __be32 *p;
1da177e4 2745
7c13f344 2746 RESERVE_SPACE(32 + XDR_LEN(conf->len));
1da177e4
LT		 2747 WRITE64(ld->ld_start);
2748 WRITE64(ld->ld_length);
2749 WRITE32(ld->ld_type);
7c13f344 2750 if (conf->len) {
1da177e4 2751 WRITEMEM(&ld->ld_clientid, 8);
7c13f344
BF		 2752 WRITE32(conf->len);
2753 WRITEMEM(conf->data, conf->len);
2754 kfree(conf->data);
1da177e4
LT		 2755 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2756 WRITE64((u64)0); /* clientid */
2757 WRITE32(0); /* length of owner name */
2758 }
2759 ADJUST_ARGS();
2760}
2761
695e12f8 2762static __be32
b37ad28b 2763nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2764{
1da177e4
LT		 2765 ENCODE_SEQID_OP_HEAD;
2766
e2f282b9
BH		 2767 if (!nfserr)
2768 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2769 else if (nfserr == nfserr_denied)
1da177e4
LT		 2770 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2771
f3e42237 2772 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2773 return nfserr;
1da177e4
LT		 2774}
2775
695e12f8 2776static __be32
b37ad28b 2777nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2778{
2779 if (nfserr == nfserr_denied)
2780 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2781 return nfserr;
1da177e4
LT		 2782}
2783
695e12f8 2784static __be32
b37ad28b 2785nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4
LT		 2786{
2787 ENCODE_SEQID_OP_HEAD;
2788
e2f282b9
BH		 2789 if (!nfserr)
2790 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2791
f3e42237 2792 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2793 return nfserr;
1da177e4
LT		 2794}
2795
2796
695e12f8 2797static __be32
b37ad28b 2798nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2799{
bc749ca4 2800 __be32 *p;
1da177e4
LT		 2801
2802 if (!nfserr) {
2803 RESERVE_SPACE(20);
c654b8a9 2804 write_cinfo(&p, &link->li_cinfo);
1da177e4
LT		 2805 ADJUST_ARGS();
2806 }
695e12f8 2807 return nfserr;
1da177e4
LT		 2808}
2809
2810
695e12f8 2811static __be32
b37ad28b 2812nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2813{
bc749ca4 2814 __be32 *p;
1da177e4
LT		 2815 ENCODE_SEQID_OP_HEAD;
2816
2817 if (nfserr)
2818 goto out;
2819
e2f282b9
BH		 2820 nfsd4_encode_stateid(resp, &open->op_stateid);
2821 RESERVE_SPACE(40);
c654b8a9 2822 write_cinfo(&p, &open->op_cinfo);
1da177e4
LT		 2823 WRITE32(open->op_rflags);
2824 WRITE32(2);
2825 WRITE32(open->op_bmval[0]);
2826 WRITE32(open->op_bmval[1]);
2827 WRITE32(open->op_delegate_type);
2828 ADJUST_ARGS();
2829
2830 switch (open->op_delegate_type) {
2831 case NFS4_OPEN_DELEGATE_NONE:
2832 break;
2833 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2834 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2835 RESERVE_SPACE(20);
7b190fec 2836 WRITE32(open->op_recall);
1da177e4
LT		 2837
2838 /*
2839 * TODO: ACE's in delegations
2840 */
2841 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2842 WRITE32(0);
2843 WRITE32(0);
2844 WRITE32(0); /* XXX: is NULL principal ok? */
2845 ADJUST_ARGS();
2846 break;
2847 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2848 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2849 RESERVE_SPACE(32);
1da177e4
LT		 2850 WRITE32(0);
2851
2852 /*
2853 * TODO: space_limit's in delegations
2854 */
2855 WRITE32(NFS4_LIMIT_SIZE);
2856 WRITE32(~(u32)0);
2857 WRITE32(~(u32)0);
2858
2859 /*
2860 * TODO: ACE's in delegations
2861 */
2862 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2863 WRITE32(0);
2864 WRITE32(0);
2865 WRITE32(0); /* XXX: is NULL principal ok? */
2866 ADJUST_ARGS();
2867 break;
d24433cd
BH		 2868 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
2869 switch (open->op_why_no_deleg) {
2870 case WND4_CONTENTION:
2871 case WND4_RESOURCE:
2872 RESERVE_SPACE(8);
2873 WRITE32(open->op_why_no_deleg);
2874 WRITE32(0); /* deleg signaling not supported yet */
2875 break;
2876 default:
2877 RESERVE_SPACE(4);
2878 WRITE32(open->op_why_no_deleg);
2879 }
2880 ADJUST_ARGS();
2881 break;
1da177e4
LT		 2882 default:
2883 BUG();
2884 }
2885 /* XXX save filehandle here */
2886out:
f3e42237 2887 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2888 return nfserr;
1da177e4
LT		 2889}
2890
695e12f8 2891static __be32
b37ad28b 2892nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4
LT		 2893{
2894 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2895
2896 if (!nfserr)
2897 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4 2898
f3e42237 2899 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2900 return nfserr;
1da177e4
LT		 2901}
2902
695e12f8 2903static __be32
b37ad28b 2904nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4
LT		 2905{
2906 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2907
2908 if (!nfserr)
2909 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4 2910
f3e42237 2911 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2912 return nfserr;
1da177e4
LT		 2913}
2914
b37ad28b
AV		 2915static __be32
2916nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2917 struct nfsd4_read *read)
1da177e4
LT		 2918{
2919 u32 eof;
afc59400
BF		 2920 int v;
2921 struct page *page;
1da177e4
LT		 2922 unsigned long maxcount;
2923 long len;
bc749ca4 2924 __be32 *p;
1da177e4
LT		 2925
2926 if (nfserr)
2927 return nfserr;
2928 if (resp->xbuf->page_len)
2929 return nfserr_resource;
2930
2931 RESERVE_SPACE(8); /* eof flag and byte count */
2932
7adae489 2933 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2934 if (maxcount > read->rd_length)
2935 maxcount = read->rd_length;
2936
2937 len = maxcount;
2938 v = 0;
2939 while (len > 0) {
afc59400
BF		 2940 page = *(resp->rqstp->rq_next_page);
2941 if (!page) { /* ran out of pages */
d5f50b0c
BF		 2942 maxcount -= len;
2943 break;
2944 }
afc59400 2945 resp->rqstp->rq_vec[v].iov_base = page_address(page);
3cc03b16 2946 resp->rqstp->rq_vec[v].iov_len =
44524359 2947 len < PAGE_SIZE ? len : PAGE_SIZE;
afc59400 2948 resp->rqstp->rq_next_page++;
1da177e4
LT		 2949 v++;
2950 len -= PAGE_SIZE;
2951 }
2952 read->rd_vlen = v;
2953
039a87ca 2954 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2955 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2956 &maxcount);
2957
1da177e4
LT		 2958 if (nfserr)
2959 return nfserr;
44524359
N		 2960 eof = (read->rd_offset + maxcount >=
2961 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2962
2963 WRITE32(eof);
2964 WRITE32(maxcount);
2965 ADJUST_ARGS();
6ed6decc
N		 2966 resp->xbuf->head[0].iov_len = (char*)p
2967 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2968 resp->xbuf->page_len = maxcount;
2969
6ed6decc 2970 /* Use rest of head for padding and remaining ops: */
6ed6decc 2971 resp->xbuf->tail[0].iov_base = p;
1da177e4 2972 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2973 if (maxcount&3) {
6ed6decc
N		 2974 RESERVE_SPACE(4);
2975 WRITE32(0);
1da177e4
LT		 2976 resp->xbuf->tail[0].iov_base += maxcount&3;
2977 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2978 ADJUST_ARGS();
1da177e4
LT		 2979 }
2980 return 0;
2981}
2982
b37ad28b
AV		 2983static __be32
2984nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 2985{
2986 int maxcount;
2987 char *page;
bc749ca4 2988 __be32 *p;
1da177e4
LT		 2989
2990 if (nfserr)
2991 return nfserr;
2992 if (resp->xbuf->page_len)
2993 return nfserr_resource;
afc59400 2994 if (!*resp->rqstp->rq_next_page)
d5f50b0c 2995 return nfserr_resource;
1da177e4 2996
afc59400 2997 page = page_address(*(resp->rqstp->rq_next_page++));
1da177e4
LT		 2998
2999 maxcount = PAGE_SIZE;
3000 RESERVE_SPACE(4);
3001
3002 /*
3003 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3004 * if they would overflow the buffer. Is this kosher in NFSv4? If
3005 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3006 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3007 */
3008 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
3009 if (nfserr == nfserr_isdir)
3010 return nfserr_inval;
3011 if (nfserr)
3012 return nfserr;
3013
3014 WRITE32(maxcount);
3015 ADJUST_ARGS();
6ed6decc
N		 3016 resp->xbuf->head[0].iov_len = (char*)p
3017 - (char*)resp->xbuf->head[0].iov_base;
3018 resp->xbuf->page_len = maxcount;
1da177e4 3019
6ed6decc 3020 /* Use rest of head for padding and remaining ops: */
6ed6decc 3021 resp->xbuf->tail[0].iov_base = p;
1da177e4 3022 resp->xbuf->tail[0].iov_len = 0;
1da177e4 3023 if (maxcount&3) {
6ed6decc
N		 3024 RESERVE_SPACE(4);
3025 WRITE32(0);
1da177e4
LT		 3026 resp->xbuf->tail[0].iov_base += maxcount&3;
3027 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 3028 ADJUST_ARGS();
1da177e4
LT		 3029 }
3030 return 0;
3031}
3032
b37ad28b
AV		 3033static __be32
3034nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3035{
3036 int maxcount;
3037 loff_t offset;
2ebbc012 3038 __be32 *page, *savep, *tailbase;
bc749ca4 3039 __be32 *p;
1da177e4
LT		 3040
3041 if (nfserr)
3042 return nfserr;
3043 if (resp->xbuf->page_len)
3044 return nfserr_resource;
afc59400 3045 if (!*resp->rqstp->rq_next_page)
d5f50b0c 3046 return nfserr_resource;
1da177e4 3047
ab4684d1 3048 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
1da177e4
LT		 3049 savep = p;
3050
3051 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3052 WRITE32(0);
3053 WRITE32(0);
3054 ADJUST_ARGS();
3055 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 3056 tailbase = p;
1da177e4
LT		 3057
3058 maxcount = PAGE_SIZE;
3059 if (maxcount > readdir->rd_maxcount)
3060 maxcount = readdir->rd_maxcount;
3061
3062 /*
3063 * Convert from bytes to words, account for the two words already
3064 * written, make sure to leave two words at the end for the next
3065 * pointer and eof field.
3066 */
3067 maxcount = (maxcount >> 2) - 4;
3068 if (maxcount < 0) {
3069 nfserr = nfserr_toosmall;
3070 goto err_no_verf;
3071 }
3072
afc59400 3073 page = page_address(*(resp->rqstp->rq_next_page++));
1da177e4
LT		 3074 readdir->common.err = 0;
3075 readdir->buflen = maxcount;
3076 readdir->buffer = page;
3077 readdir->offset = NULL;
3078
3079 offset = readdir->rd_cookie;
3080 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3081 &offset,
3082 &readdir->common, nfsd4_encode_dirent);
3083 if (nfserr == nfs_ok &&
3084 readdir->common.err == nfserr_toosmall &&
3085 readdir->buffer == page)
3086 nfserr = nfserr_toosmall;
1da177e4
LT		 3087 if (nfserr)
3088 goto err_no_verf;
3089
3090 if (readdir->offset)
3091 xdr_encode_hyper(readdir->offset, offset);
3092
3093 p = readdir->buffer;
3094 *p++ = 0; /* no more entries */
3095 *p++ = htonl(readdir->common.err == nfserr_eof);
afc59400
BF		 3096 resp->xbuf->page_len = ((char*)p) -
3097 (char*)page_address(*(resp->rqstp->rq_next_page-1));
1da177e4 3098
bb6e8a9f 3099 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 3100 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 3101 resp->xbuf->tail[0].iov_len = 0;
3102 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 3103 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 3104
3105 return 0;
3106err_no_verf:
3107 p = savep;
3108 ADJUST_ARGS();
3109 return nfserr;
3110}
3111
695e12f8 3112static __be32
b37ad28b 3113nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3114{
bc749ca4 3115 __be32 *p;
1da177e4
LT		 3116
3117 if (!nfserr) {
3118 RESERVE_SPACE(20);
c654b8a9 3119 write_cinfo(&p, &remove->rm_cinfo);
1da177e4
LT		 3120 ADJUST_ARGS();
3121 }
695e12f8 3122 return nfserr;
1da177e4
LT		 3123}
3124
695e12f8 3125static __be32
b37ad28b 3126nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3127{
bc749ca4 3128 __be32 *p;
1da177e4
LT		 3129
3130 if (!nfserr) {
3131 RESERVE_SPACE(40);
c654b8a9
BF		 3132 write_cinfo(&p, &rename->rn_sinfo);
3133 write_cinfo(&p, &rename->rn_tinfo);
1da177e4
LT		 3134 ADJUST_ARGS();
3135 }
695e12f8 3136 return nfserr;
1da177e4
LT		 3137}
3138
695e12f8 3139static __be32
22b6dee8
MJ		 3140nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
3141 __be32 nfserr,struct svc_export *exp)
dcb488a3
AA		 3142{
3143 int i = 0;
4796f457
BF		 3144 u32 nflavs;
3145 struct exp_flavor_info *flavs;
3146 struct exp_flavor_info def_flavs[2];
bc749ca4 3147 __be32 *p;
dcb488a3
AA		 3148
3149 if (nfserr)
3150 goto out;
4796f457
BF		 3151 if (exp->ex_nflavors) {
3152 flavs = exp->ex_flavors;
3153 nflavs = exp->ex_nflavors;
3154 } else { /* Handling of some defaults in absence of real secinfo: */
3155 flavs = def_flavs;
3156 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3157 nflavs = 2;
3158 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3159 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3160 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3161 nflavs = 1;
3162 flavs[0].pseudoflavor
3163 = svcauth_gss_flavor(exp->ex_client);
3164 } else {
3165 nflavs = 1;
3166 flavs[0].pseudoflavor
3167 = exp->ex_client->flavour->flavour;
3168 }
3169 }
3170
dcb488a3 3171 RESERVE_SPACE(4);
4796f457 3172 WRITE32(nflavs);
dcb488a3 3173 ADJUST_ARGS();
4796f457
BF		 3174 for (i = 0; i < nflavs; i++) {
3175 u32 flav = flavs[i].pseudoflavor;
dcb488a3
AA		 3176 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
3177
3178 if (gm) {
3179 RESERVE_SPACE(4);
3180 WRITE32(RPC_AUTH_GSS);
3181 ADJUST_ARGS();
3182 RESERVE_SPACE(4 + gm->gm_oid.len);
3183 WRITE32(gm->gm_oid.len);
3184 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
3185 ADJUST_ARGS();
3186 RESERVE_SPACE(4);
3187 WRITE32(0); /* qop */
3188 ADJUST_ARGS();
3189 RESERVE_SPACE(4);
3190 WRITE32(gss_pseudoflavor_to_service(gm, flav));
3191 ADJUST_ARGS();
3192 gss_mech_put(gm);
3193 } else {
3194 RESERVE_SPACE(4);
3195 WRITE32(flav);
3196 ADJUST_ARGS();
3197 }
3198 }
3199out:
3200 if (exp)
3201 exp_put(exp);
695e12f8 3202 return nfserr;
dcb488a3
AA		 3203}
3204
22b6dee8
MJ		 3205static __be32
3206nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3207 struct nfsd4_secinfo *secinfo)
3208{
3209 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3210}
3211
3212static __be32
3213nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3214 struct nfsd4_secinfo_no_name *secinfo)
3215{
3216 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3217}
3218
1da177e4
LT		 3219/*
3220 * The SETATTR encode routine is special -- it always encodes a bitmap,
3221 * regardless of the error status.
3222 */
695e12f8 3223static __be32
b37ad28b 3224nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3225{
bc749ca4 3226 __be32 *p;
1da177e4
LT		 3227
3228 RESERVE_SPACE(12);
3229 if (nfserr) {
3230 WRITE32(2);
3231 WRITE32(0);
3232 WRITE32(0);
3233 }
3234 else {
3235 WRITE32(2);
3236 WRITE32(setattr->sa_bmval[0]);
3237 WRITE32(setattr->sa_bmval[1]);
3238 }
3239 ADJUST_ARGS();
695e12f8 3240 return nfserr;
1da177e4
LT		 3241}
3242
695e12f8 3243static __be32
b37ad28b 3244nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3245{
bc749ca4 3246 __be32 *p;
1da177e4
LT		 3247
3248 if (!nfserr) {
ab4684d1 3249 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE);
1da177e4 3250 WRITEMEM(&scd->se_clientid, 8);
ab4684d1 3251 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3252 ADJUST_ARGS();
3253 }
3254 else if (nfserr == nfserr_clid_inuse) {
3255 RESERVE_SPACE(8);
3256 WRITE32(0);
3257 WRITE32(0);
3258 ADJUST_ARGS();
3259 }
695e12f8 3260 return nfserr;
1da177e4
LT		 3261}
3262
695e12f8 3263static __be32
b37ad28b 3264nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3265{
bc749ca4 3266 __be32 *p;
1da177e4
LT		 3267
3268 if (!nfserr) {
3269 RESERVE_SPACE(16);
3270 WRITE32(write->wr_bytes_written);
3271 WRITE32(write->wr_how_written);
ab4684d1 3272 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3273 ADJUST_ARGS();
3274 }
695e12f8 3275 return nfserr;
1da177e4
LT		 3276}
3277
2db134eb 3278static __be32
57b7b43b 3279nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3280 struct nfsd4_exchange_id *exid)
3281{
bc749ca4 3282 __be32 *p;
0733d213
AA		 3283 char *major_id;
3284 char *server_scope;
3285 int major_id_sz;
3286 int server_scope_sz;
3287 uint64_t minor_id = 0;
3288
3289 if (nfserr)
3290 return nfserr;
3291
3292 major_id = utsname()->nodename;
3293 major_id_sz = strlen(major_id);
3294 server_scope = utsname()->nodename;
3295 server_scope_sz = strlen(server_scope);
3296
3297 RESERVE_SPACE(
3298 8 /* eir_clientid */ +
3299 4 /* eir_sequenceid */ +
3300 4 /* eir_flags */ +
3301 4 /* spr_how (SP4_NONE) */ +
3302 8 /* so_minor_id */ +
3303 4 /* so_major_id.len */ +
3304 (XDR_QUADLEN(major_id_sz) * 4) +
3305 4 /* eir_server_scope.len */ +
3306 (XDR_QUADLEN(server_scope_sz) * 4) +
3307 4 /* eir_server_impl_id.count (0) */);
3308
3309 WRITEMEM(&exid->clientid, 8);
3310 WRITE32(exid->seqid);
3311 WRITE32(exid->flags);
3312
3313 /* state_protect4_r. Currently only support SP4_NONE */
3314 BUG_ON(exid->spa_how != SP4_NONE);
3315 WRITE32(exid->spa_how);
3316
3317 /* The server_owner struct */
3318 WRITE64(minor_id); /* Minor id */
3319 /* major id */
3320 WRITE32(major_id_sz);
3321 WRITEMEM(major_id, major_id_sz);
3322
3323 /* Server scope */
3324 WRITE32(server_scope_sz);
3325 WRITEMEM(server_scope, server_scope_sz);
3326
3327 /* Implementation id */
3328 WRITE32(0); /* zero length nfs_impl_id4 array */
3329 ADJUST_ARGS();
3330 return 0;
2db134eb
AA		 3331}
3332
3333static __be32
57b7b43b 3334nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3335 struct nfsd4_create_session *sess)
3336{
bc749ca4 3337 __be32 *p;
ec6b5d7b
AA		 3338
3339 if (nfserr)
3340 return nfserr;
3341
3342 RESERVE_SPACE(24);
3343 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3344 WRITE32(sess->seqid);
3345 WRITE32(sess->flags);
3346 ADJUST_ARGS();
3347
3348 RESERVE_SPACE(28);
3349 WRITE32(0); /* headerpadsz */
3350 WRITE32(sess->fore_channel.maxreq_sz);
3351 WRITE32(sess->fore_channel.maxresp_sz);
3352 WRITE32(sess->fore_channel.maxresp_cached);
3353 WRITE32(sess->fore_channel.maxops);
3354 WRITE32(sess->fore_channel.maxreqs);
3355 WRITE32(sess->fore_channel.nr_rdma_attrs);
3356 ADJUST_ARGS();
3357
3358 if (sess->fore_channel.nr_rdma_attrs) {
3359 RESERVE_SPACE(4);
3360 WRITE32(sess->fore_channel.rdma_attrs);
3361 ADJUST_ARGS();
3362 }
3363
3364 RESERVE_SPACE(28);
3365 WRITE32(0); /* headerpadsz */
3366 WRITE32(sess->back_channel.maxreq_sz);
3367 WRITE32(sess->back_channel.maxresp_sz);
3368 WRITE32(sess->back_channel.maxresp_cached);
3369 WRITE32(sess->back_channel.maxops);
3370 WRITE32(sess->back_channel.maxreqs);
3371 WRITE32(sess->back_channel.nr_rdma_attrs);
3372 ADJUST_ARGS();
3373
3374 if (sess->back_channel.nr_rdma_attrs) {
3375 RESERVE_SPACE(4);
3376 WRITE32(sess->back_channel.rdma_attrs);
3377 ADJUST_ARGS();
3378 }
3379 return 0;
2db134eb
AA		 3380}
3381
3382static __be32
57b7b43b 3383nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3384 struct nfsd4_destroy_session *destroy_session)
3385{
2db134eb
AA		 3386 return nfserr;
3387}
3388
e1ca12df 3389static __be32
d1829b38 3390nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
e1ca12df
BS		 3391 struct nfsd4_free_stateid *free_stateid)
3392{
3393 __be32 *p;
3394
3395 if (nfserr)
3396 return nfserr;
3397
3398 RESERVE_SPACE(4);
d1829b38 3399 *p++ = nfserr;
e1ca12df
BS		 3400 ADJUST_ARGS();
3401 return nfserr;
3402}
3403
c47d832b 3404static __be32
57b7b43b 3405nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3406 struct nfsd4_sequence *seq)
3407{
bc749ca4 3408 __be32 *p;
b85d4c01
BH		 3409
3410 if (nfserr)
3411 return nfserr;
3412
3413 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3414 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3415 WRITE32(seq->seqid);
3416 WRITE32(seq->slotid);
b7d7ca35
BF		 3417 /* Note slotid's are numbered from zero: */
3418 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3419 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
0d7bb719 3420 WRITE32(seq->status_flags);
b85d4c01
BH		 3421
3422 ADJUST_ARGS();
557ce264 3423 resp->cstate.datap = p; /* DRC cache data pointer */
b85d4c01 3424 return 0;
2db134eb
AA		 3425}
3426
2355c596 3427static __be32
57b7b43b 3428nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3429 struct nfsd4_test_stateid *test_stateid)
3430{
03cfb420 3431 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3432 __be32 *p;
17456804 3433
03cfb420 3434 RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
17456804 3435 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3436
03cfb420 3437 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3438 *p++ = stateid->ts_id_status;
17456804 3439 }
17456804 3440
03cfb420 3441 ADJUST_ARGS();
17456804
BS		 3442 return nfserr;
3443}
3444
695e12f8
BH		 3445static __be32
3446nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3447{
3448 return nfserr;
3449}
3450
3451typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3452
2db134eb
AA		 3453/*
3454 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3455 * since we don't need to filter out obsolete ops as this is
3456 * done in the decoding phase.
3457 */
695e12f8 3458static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3459 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3460 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3461 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3462 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3463 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3464 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3465 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3466 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3467 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3468 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3469 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3470 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3471 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3472 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3473 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3474 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3475 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3476 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3477 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3478 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3479 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3480 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3481 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3482 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3483 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3484 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3485 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3486 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3487 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3488 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3489 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3490 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3491 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3492 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3493 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3494 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3495 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3496
3497 /* NFSv4.1 operations */
3498 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3499 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3500 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3501 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3502 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
e1ca12df 3503 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
2db134eb
AA		 3504 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3505 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3506 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3507 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3508 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3509 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3510 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3511 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3512 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3513 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3514 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3515 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3516 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3517};
3518
496c262c
AA		 3519/*
3520 * Calculate the total amount of memory that the compound response has taken
58e7b33a 3521 * after encoding the current operation with pad.
496c262c 3522 *
58e7b33a
MJ		 3523 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3524 * which was specified at nfsd4_operation, else pad is zero.
496c262c 3525 *
58e7b33a 3526 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
496c262c
AA		 3527 *
3528 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3529 * will be at least a page and will therefore hold the xdr_buf head.
3530 */
57b7b43b 3531__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
496c262c 3532{
496c262c 3533 struct xdr_buf *xb = &resp->rqstp->rq_res;
496c262c
AA		 3534 struct nfsd4_session *session = NULL;
3535 struct nfsd4_slot *slot = resp->cstate.slot;
58e7b33a 3536 u32 length, tlen = 0;
496c262c
AA		 3537
3538 if (!nfsd4_has_session(&resp->cstate))
58e7b33a 3539 return 0;
496c262c
AA		 3540
3541 session = resp->cstate.session;
58e7b33a
MJ		 3542 if (session == NULL)
3543 return 0;
496c262c
AA		 3544
3545 if (xb->page_len == 0) {
3546 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3547 } else {
3548 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3549 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3550
3551 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3552 }
3553 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3554 length, xb->page_len, tlen, pad);
3555
58e7b33a
MJ		 3556 if (length > session->se_fchannel.maxresp_sz)
3557 return nfserr_rep_too_big;
3558
73e79482 3559 if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
58e7b33a 3560 length > session->se_fchannel.maxresp_cached)
496c262c 3561 return nfserr_rep_too_big_to_cache;
58e7b33a
MJ		 3562
3563 return 0;
496c262c
AA		 3564}
3565
1da177e4
LT		 3566void
3567nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3568{
2ebbc012 3569 __be32 *statp;
bc749ca4 3570 __be32 *p;
1da177e4
LT		 3571
3572 RESERVE_SPACE(8);
3573 WRITE32(op->opnum);
3574 statp = p++; /* to be backfilled at the end */
3575 ADJUST_ARGS();
3576
695e12f8
BH		 3577 if (op->opnum == OP_ILLEGAL)
3578 goto status;
3579 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3580 !nfsd4_enc_ops[op->opnum]);
3581 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
496c262c 3582 /* nfsd4_check_drc_limit guarantees enough room for error status */
58e7b33a
MJ		 3583 if (!op->status)
3584 op->status = nfsd4_check_resp_size(resp, 0);
695e12f8 3585status:
1da177e4
LT		 3586 /*
3587 * Note: We write the status directly, instead of using WRITE32(),
3588 * since it is already in network byte order.
3589 */
3590 *statp = op->status;
3591}
3592
3593/*
3594 * Encode the reply stored in the stateowner reply cache
3595 *
3596 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3597 * previously sent already encoded operation.
3598 *
3599 * called with nfs4_lock_state() held
3600 */
3601void
3602nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3603{
bc749ca4 3604 __be32 *p;
1da177e4
LT		 3605 struct nfs4_replay *rp = op->replay;
3606
3607 BUG_ON(!rp);
3608
3609 RESERVE_SPACE(8);
3610 WRITE32(op->opnum);
3611 *p++ = rp->rp_status; /* already xdr'ed */
3612 ADJUST_ARGS();
3613
3614 RESERVE_SPACE(rp->rp_buflen);
3615 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3616 ADJUST_ARGS();
3617}
3618
1da177e4 3619int
2ebbc012 3620nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3621{
3622 return xdr_ressize_check(rqstp, p);
3623}
3624
3e98abff 3625int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3626{
3e98abff
BF		 3627 struct svc_rqst *rqstp = rq;
3628 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3629
1da177e4
LT		 3630 if (args->ops != args->iops) {
3631 kfree(args->ops);
3632 args->ops = args->iops;
3633 }
f99d49ad
JJ		 3634 kfree(args->tmpp);
3635 args->tmpp = NULL;
1da177e4
LT		 3636 while (args->to_free) {
3637 struct tmpbuf *tb = args->to_free;
3638 args->to_free = tb->next;
3639 tb->release(tb->buf);
3640 kfree(tb);
3641 }
3e98abff 3642 return 1;
1da177e4
LT		 3643}
3644
3645int
2ebbc012 3646nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3647{
1da177e4
LT		 3648 args->p = p;
3649 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3650 args->pagelist = rqstp->rq_arg.pages;
3651 args->pagelen = rqstp->rq_arg.page_len;
3652 args->tmpp = NULL;
3653 args->to_free = NULL;
3654 args->ops = args->iops;
3655 args->rqstp = rqstp;
3656
3e98abff 3657 return !nfsd4_decode_compound(args);
1da177e4
LT		 3658}
3659
3660int
2ebbc012 3661nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3662{
3663 /*
3664 * All that remains is to write the tag and operation count...
3665 */
557ce264 3666 struct nfsd4_compound_state *cs = &resp->cstate;
1da177e4
LT		 3667 struct kvec *iov;
3668 p = resp->tagp;
3669 *p++ = htonl(resp->taglen);
3670 memcpy(p, resp->tag, resp->taglen);
3671 p += XDR_QUADLEN(resp->taglen);
3672 *p++ = htonl(resp->opcnt);
3673
3674 if (rqstp->rq_res.page_len)
3675 iov = &rqstp->rq_res.tail[0];
3676 else
3677 iov = &rqstp->rq_res.head[0];
3678 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3679 BUG_ON(iov->iov_len > PAGE_SIZE);
26c0c75e
BF		 3680 if (nfsd4_has_session(cs)) {
3681 if (cs->status != nfserr_replay_cache) {
3682 nfsd4_store_cache_entry(resp);
73e79482 3683 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 3684 }
d7682988
BH		 3685 /* Renew the clientid on success and on replay */
3686 release_session_client(cs->session);
76407f76 3687 nfsd4_put_session(cs->session);
da3846a2 3688 }
1da177e4
LT		 3689 return 1;
3690}
3691
3692/*
3693 * Local variables:
3694 * c-basic-offset: 8
3695 * End:
3696 */
kernel source for telekom puls (alcatel/mediatek)