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nfsd4: simplify server xdr->next_page use
[mirror_ubuntu-artful-kernel.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
18032ca0
DQ		 58#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
59#include <linux/security.h>
60#endif
61
62
1da177e4
LT		 63#define NFSDDBG_FACILITY NFSDDBG_XDR
64
42ca0993
BF		 65/*
66 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
67 * directory in order to indicate to the client that a filesystem boundary is present
68 * We use a fixed fsid for a referral
69 */
70#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
71#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
72
b37ad28b 73static __be32
a36b1725 74check_filename(char *str, int len)
1da177e4
LT		 75{
76 int i;
77
78 if (len == 0)
79 return nfserr_inval;
80 if (isdotent(str, len))
a36b1725 81 return nfserr_badname;
1da177e4
LT		 82 for (i = 0; i < len; i++)
83 if (str[i] == '/')
a36b1725 84 return nfserr_badname;
1da177e4
LT		 85 return 0;
86}
87
1da177e4 88#define DECODE_HEAD \
2ebbc012 89 __be32 *p; \
b37ad28b 90 __be32 status
1da177e4
LT		 91#define DECODE_TAIL \
92 status = 0; \
93out: \
94 return status; \
95xdr_error: \
817cb9d4
CL		 96 dprintk("NFSD: xdr error (%s:%d)\n", \
97 __FILE__, __LINE__); \
1da177e4
LT		 98 status = nfserr_bad_xdr; \
99 goto out
100
101#define READ32(x) (x) = ntohl(*p++)
102#define READ64(x) do { \
103 (x) = (u64)ntohl(*p++) << 32; \
104 (x) |= ntohl(*p++); \
105} while (0)
1da177e4
LT		 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
590b7431
BF		 137static void next_decode_page(struct nfsd4_compoundargs *argp)
138{
590b7431 139 argp->p = page_address(argp->pagelist[0]);
365da4ad 140 argp->pagelist++;
590b7431
BF		 141 if (argp->pagelen < PAGE_SIZE) {
142 argp->end = argp->p + (argp->pagelen>>2);
143 argp->pagelen = 0;
144 } else {
145 argp->end = argp->p + (PAGE_SIZE>>2);
146 argp->pagelen -= PAGE_SIZE;
147 }
148}
149
ca2a05aa 150static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 151{
152 /* We want more bytes than seem to be available.
153 * Maybe we need a new page, maybe we have just run out
154 */
ca2a05aa 155 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 156 __be32 *p;
1da177e4
LT		 157 if (avail + argp->pagelen < nbytes)
158 return NULL;
159 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
160 return NULL;
161 /* ok, we can do it with the current plus the next page */
162 if (nbytes <= sizeof(argp->tmp))
163 p = argp->tmp;
164 else {
f99d49ad 165 kfree(argp->tmpp);
1da177e4
LT		 166 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
167 if (!p)
168 return NULL;
169
170 }
ca2a05aa
BF		 171 /*
172 * The following memcpy is safe because read_buf is always
173 * called with nbytes > avail, and the two cases above both
174 * guarantee p points to at least nbytes bytes.
175 */
1da177e4 176 memcpy(p, argp->p, avail);
590b7431 177 next_decode_page(argp);
1da177e4
LT		 178 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
179 argp->p += XDR_QUADLEN(nbytes - avail);
180 return p;
181}
182
60adfc50
AA		 183static int zero_clientid(clientid_t *clid)
184{
185 return (clid->cl_boot == 0) && (clid->cl_id == 0);
186}
187
2d8498db
CH		 188/**
189 * defer_free - mark an allocation as deferred freed
190 * @argp: NFSv4 compound argument structure to be freed with
191 * @release: release callback to free @p, typically kfree()
192 * @p: pointer to be freed
193 *
194 * Marks @p to be freed when processing the compound operation
195 * described in @argp finishes.
196 */
1da177e4
LT		 197static int
198defer_free(struct nfsd4_compoundargs *argp,
199 void (*release)(const void *), void *p)
200{
201 struct tmpbuf *tb;
202
203 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
204 if (!tb)
205 return -ENOMEM;
206 tb->buf = p;
207 tb->release = release;
208 tb->next = argp->to_free;
209 argp->to_free = tb;
210 return 0;
211}
212
2d8498db
CH		 213/**
214 * savemem - duplicate a chunk of memory for later processing
215 * @argp: NFSv4 compound argument structure to be freed with
216 * @p: pointer to be duplicated
217 * @nbytes: length to be duplicated
218 *
219 * Returns a pointer to a copy of @nbytes bytes of memory at @p
220 * that are preserved until processing of the NFSv4 compound
221 * operation described by @argp finishes.
222 */
2ebbc012 223static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 224{
1da177e4 225 if (p == argp->tmp) {
67114fe6 226 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
a4db5fe5
BF		 227 if (!p)
228 return NULL;
1da177e4 229 } else {
73dff8be 230 BUG_ON(p != argp->tmpp);
1da177e4
LT		 231 argp->tmpp = NULL;
232 }
233 if (defer_free(argp, kfree, p)) {
a4db5fe5 234 kfree(p);
1da177e4
LT		 235 return NULL;
236 } else
237 return (char *)p;
238}
239
b37ad28b 240static __be32
1da177e4
LT		 241nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
242{
243 u32 bmlen;
244 DECODE_HEAD;
245
246 bmval[0] = 0;
247 bmval[1] = 0;
7e705706 248 bmval[2] = 0;
1da177e4
LT		 249
250 READ_BUF(4);
251 READ32(bmlen);
252 if (bmlen > 1000)
253 goto xdr_error;
254
255 READ_BUF(bmlen << 2);
256 if (bmlen > 0)
257 READ32(bmval[0]);
258 if (bmlen > 1)
259 READ32(bmval[1]);
7e705706
AA		 260 if (bmlen > 2)
261 READ32(bmval[2]);
1da177e4
LT		 262
263 DECODE_TAIL;
264}
265
b37ad28b 266static __be32
3c8e0316 267nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0
DQ		 268 struct iattr *iattr, struct nfs4_acl **acl,
269 struct xdr_netobj *label)
1da177e4
LT		 270{
271 int expected_len, len = 0;
272 u32 dummy32;
273 char *buf;
274
275 DECODE_HEAD;
276 iattr->ia_valid = 0;
277 if ((status = nfsd4_decode_bitmap(argp, bmval)))
278 return status;
279
1da177e4
LT		 280 READ_BUF(4);
281 READ32(expected_len);
282
283 if (bmval[0] & FATTR4_WORD0_SIZE) {
284 READ_BUF(8);
285 len += 8;
286 READ64(iattr->ia_size);
287 iattr->ia_valid |= ATTR_SIZE;
288 }
289 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 290 u32 nace;
28e05dd8 291 struct nfs4_ace *ace;
1da177e4
LT		 292
293 READ_BUF(4); len += 4;
294 READ32(nace);
295
28e05dd8 296 if (nace > NFS4_ACL_MAX)
798df338 297 return nfserr_fbig;
28e05dd8
BF		 298
299 *acl = nfs4_acl_new(nace);
eba1c99c
KM		 300 if (*acl == NULL)
301 return nfserr_jukebox;
302
28e05dd8 303 defer_free(argp, kfree, *acl);
1da177e4 304
28e05dd8
BF		 305 (*acl)->naces = nace;
306 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 307 READ_BUF(16); len += 16;
28e05dd8
BF		 308 READ32(ace->type);
309 READ32(ace->flag);
310 READ32(ace->access_mask);
1da177e4
LT		 311 READ32(dummy32);
312 READ_BUF(dummy32);
313 len += XDR_QUADLEN(dummy32) << 2;
314 READMEM(buf, dummy32);
28e05dd8 315 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 316 status = nfs_ok;
28e05dd8 317 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 318 ;
28e05dd8 319 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 320 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 321 buf, dummy32, &ace->who_gid);
1da177e4 322 else
3c726023 323 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 324 buf, dummy32, &ace->who_uid);
3c726023
BF		 325 if (status)
326 return status;
1da177e4
LT		 327 }
328 } else
329 *acl = NULL;
330 if (bmval[1] & FATTR4_WORD1_MODE) {
331 READ_BUF(4);
332 len += 4;
333 READ32(iattr->ia_mode);
334 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
335 iattr->ia_valid |= ATTR_MODE;
336 }
337 if (bmval[1] & FATTR4_WORD1_OWNER) {
338 READ_BUF(4);
339 len += 4;
340 READ32(dummy32);
341 READ_BUF(dummy32);
342 len += (XDR_QUADLEN(dummy32) << 2);
343 READMEM(buf, dummy32);
47c85291
N		 344 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
345 return status;
1da177e4
LT		 346 iattr->ia_valid |= ATTR_UID;
347 }
348 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
349 READ_BUF(4);
350 len += 4;
351 READ32(dummy32);
352 READ_BUF(dummy32);
353 len += (XDR_QUADLEN(dummy32) << 2);
354 READMEM(buf, dummy32);
47c85291
N		 355 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
356 return status;
1da177e4
LT		 357 iattr->ia_valid |= ATTR_GID;
358 }
359 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
360 READ_BUF(4);
361 len += 4;
362 READ32(dummy32);
363 switch (dummy32) {
364 case NFS4_SET_TO_CLIENT_TIME:
365 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
366 all 32 bits of 'nseconds'. */
367 READ_BUF(12);
368 len += 12;
bf8d9097 369 READ64(iattr->ia_atime.tv_sec);
1da177e4
LT		 370 READ32(iattr->ia_atime.tv_nsec);
371 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
372 return nfserr_inval;
373 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
374 break;
375 case NFS4_SET_TO_SERVER_TIME:
376 iattr->ia_valid |= ATTR_ATIME;
377 break;
378 default:
379 goto xdr_error;
380 }
381 }
1da177e4
LT		 382 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
383 READ_BUF(4);
384 len += 4;
385 READ32(dummy32);
386 switch (dummy32) {
387 case NFS4_SET_TO_CLIENT_TIME:
388 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
389 all 32 bits of 'nseconds'. */
390 READ_BUF(12);
391 len += 12;
bf8d9097 392 READ64(iattr->ia_mtime.tv_sec);
1da177e4
LT		 393 READ32(iattr->ia_mtime.tv_nsec);
394 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
395 return nfserr_inval;
396 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
397 break;
398 case NFS4_SET_TO_SERVER_TIME:
399 iattr->ia_valid |= ATTR_MTIME;
400 break;
401 default:
402 goto xdr_error;
403 }
404 }
18032ca0
DQ		 405
406 label->len = 0;
407#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
408 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
409 READ_BUF(4);
410 len += 4;
411 READ32(dummy32); /* lfs: we don't use it */
412 READ_BUF(4);
413 len += 4;
414 READ32(dummy32); /* pi: we don't use it either */
415 READ_BUF(4);
416 len += 4;
417 READ32(dummy32);
418 READ_BUF(dummy32);
419 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
420 return nfserr_badlabel;
421 len += (XDR_QUADLEN(dummy32) << 2);
422 READMEM(buf, dummy32);
423 label->data = kzalloc(dummy32 + 1, GFP_KERNEL);
424 if (!label->data)
425 return nfserr_jukebox;
3378b7f4 426 label->len = dummy32;
18032ca0
DQ		 427 defer_free(argp, kfree, label->data);
428 memcpy(label->data, buf, dummy32);
429 }
430#endif
431
3c8e0316
YZ		 432 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
433 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
434 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
435 READ_BUF(expected_len - len);
436 else if (len != expected_len)
1da177e4
LT		 437 goto xdr_error;
438
439 DECODE_TAIL;
1da177e4
LT		 440}
441
e31a1b66
BH		 442static __be32
443nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
444{
445 DECODE_HEAD;
446
447 READ_BUF(sizeof(stateid_t));
448 READ32(sid->si_generation);
449 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
450
451 DECODE_TAIL;
452}
453
b37ad28b 454static __be32
1da177e4
LT		 455nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
456{
457 DECODE_HEAD;
458
459 READ_BUF(4);
460 READ32(access->ac_req_access);
461
462 DECODE_TAIL;
463}
464
acb2887e
BF		 465static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
466{
467 DECODE_HEAD;
12fc3e92 468 u32 dummy, uid, gid;
acb2887e
BF		 469 char *machine_name;
470 int i;
471 int nr_secflavs;
472
473 /* callback_sec_params4 */
474 READ_BUF(4);
475 READ32(nr_secflavs);
57569a70
BF		 476 if (nr_secflavs)
477 cbs->flavor = (u32)(-1);
478 else
479 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
480 cbs->flavor = 0;
acb2887e
BF		 481 for (i = 0; i < nr_secflavs; ++i) {
482 READ_BUF(4);
483 READ32(dummy);
484 switch (dummy) {
485 case RPC_AUTH_NULL:
486 /* Nothing to read */
12fc3e92
BF		 487 if (cbs->flavor == (u32)(-1))
488 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 489 break;
490 case RPC_AUTH_UNIX:
491 READ_BUF(8);
492 /* stamp */
493 READ32(dummy);
494
495 /* machine name */
496 READ32(dummy);
497 READ_BUF(dummy);
498 SAVEMEM(machine_name, dummy);
499
500 /* uid, gid */
501 READ_BUF(8);
12fc3e92
BF		 502 READ32(uid);
503 READ32(gid);
acb2887e
BF		 504
505 /* more gids */
506 READ_BUF(4);
507 READ32(dummy);
508 READ_BUF(dummy * 4);
12fc3e92 509 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 510 kuid_t kuid = make_kuid(&init_user_ns, uid);
511 kgid_t kgid = make_kgid(&init_user_ns, gid);
512 if (uid_valid(kuid) && gid_valid(kgid)) {
513 cbs->uid = kuid;
514 cbs->gid = kgid;
515 cbs->flavor = RPC_AUTH_UNIX;
516 } else {
517 dprintk("RPC_AUTH_UNIX with invalid"
518 "uid or gid ignoring!\n");
519 }
12fc3e92 520 }
acb2887e
BF		 521 break;
522 case RPC_AUTH_GSS:
523 dprintk("RPC_AUTH_GSS callback secflavor "
524 "not supported!\n");
525 READ_BUF(8);
526 /* gcbp_service */
527 READ32(dummy);
528 /* gcbp_handle_from_server */
529 READ32(dummy);
530 READ_BUF(dummy);
531 p += XDR_QUADLEN(dummy);
532 /* gcbp_handle_from_client */
533 READ_BUF(4);
534 READ32(dummy);
535 READ_BUF(dummy);
536 break;
537 default:
538 dprintk("Illegal callback secflavor\n");
539 return nfserr_inval;
540 }
541 }
542 DECODE_TAIL;
543}
544
cb73a9f4
BF		 545static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
546{
547 DECODE_HEAD;
548
549 READ_BUF(4);
550 READ32(bc->bc_cb_program);
551 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
552
553 DECODE_TAIL;
554}
555
1d1bc8f2
BF		 556static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
557{
558 DECODE_HEAD;
1d1bc8f2
BF		 559
560 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
561 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
562 READ32(bcts->dir);
6ce2357f
BS		 563 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
564 * could help us figure out we should be using it. */
1d1bc8f2
BF		 565 DECODE_TAIL;
566}
567
b37ad28b 568static __be32
1da177e4
LT		 569nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
570{
571 DECODE_HEAD;
572
e31a1b66 573 READ_BUF(4);
1da177e4 574 READ32(close->cl_seqid);
e31a1b66 575 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 576
577 DECODE_TAIL;
578}
579
580
b37ad28b 581static __be32
1da177e4
LT		 582nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
583{
584 DECODE_HEAD;
585
586 READ_BUF(12);
587 READ64(commit->co_offset);
588 READ32(commit->co_count);
589
590 DECODE_TAIL;
591}
592
b37ad28b 593static __be32
1da177e4
LT		 594nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
595{
596 DECODE_HEAD;
597
598 READ_BUF(4);
599 READ32(create->cr_type);
600 switch (create->cr_type) {
601 case NF4LNK:
602 READ_BUF(4);
603 READ32(create->cr_linklen);
604 READ_BUF(create->cr_linklen);
605 SAVEMEM(create->cr_linkname, create->cr_linklen);
606 break;
607 case NF4BLK:
608 case NF4CHR:
609 READ_BUF(8);
610 READ32(create->cr_specdata1);
611 READ32(create->cr_specdata2);
612 break;
613 case NF4SOCK:
614 case NF4FIFO:
615 case NF4DIR:
616 default:
617 break;
618 }
619
620 READ_BUF(4);
621 READ32(create->cr_namelen);
622 READ_BUF(create->cr_namelen);
623 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 624 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 625 return status;
626
3c8e0316 627 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
18032ca0 628 &create->cr_acl, &create->cr_label);
c0d6fc8a 629 if (status)
1da177e4
LT		 630 goto out;
631
632 DECODE_TAIL;
633}
634
b37ad28b 635static inline __be32
1da177e4
LT		 636nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
637{
e31a1b66 638 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 639}
640
b37ad28b 641static inline __be32
1da177e4
LT		 642nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
643{
644 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
645}
646
b37ad28b 647static __be32
1da177e4
LT		 648nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
649{
650 DECODE_HEAD;
651
652 READ_BUF(4);
653 READ32(link->li_namelen);
654 READ_BUF(link->li_namelen);
655 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 656 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 657 return status;
658
659 DECODE_TAIL;
660}
661
b37ad28b 662static __be32
1da177e4
LT		 663nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
664{
665 DECODE_HEAD;
666
1da177e4
LT		 667 /*
668 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
669 */
670 READ_BUF(28);
671 READ32(lock->lk_type);
672 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
673 goto xdr_error;
674 READ32(lock->lk_reclaim);
675 READ64(lock->lk_offset);
676 READ64(lock->lk_length);
677 READ32(lock->lk_is_new);
678
679 if (lock->lk_is_new) {
e31a1b66 680 READ_BUF(4);
1da177e4 681 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 682 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
683 if (status)
684 return status;
685 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 686 READ32(lock->lk_new_lock_seqid);
687 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
688 READ32(lock->lk_new_owner.len);
689 READ_BUF(lock->lk_new_owner.len);
690 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
691 } else {
e31a1b66
BH		 692 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
693 if (status)
694 return status;
695 READ_BUF(4);
1da177e4
LT		 696 READ32(lock->lk_old_lock_seqid);
697 }
698
699 DECODE_TAIL;
700}
701
b37ad28b 702static __be32
1da177e4
LT		 703nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
704{
705 DECODE_HEAD;
706
707 READ_BUF(32);
708 READ32(lockt->lt_type);
709 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
710 goto xdr_error;
711 READ64(lockt->lt_offset);
712 READ64(lockt->lt_length);
713 COPYMEM(&lockt->lt_clientid, 8);
714 READ32(lockt->lt_owner.len);
715 READ_BUF(lockt->lt_owner.len);
716 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
717
718 DECODE_TAIL;
719}
720
b37ad28b 721static __be32
1da177e4
LT		 722nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
723{
724 DECODE_HEAD;
725
e31a1b66 726 READ_BUF(8);
1da177e4
LT		 727 READ32(locku->lu_type);
728 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
729 goto xdr_error;
730 READ32(locku->lu_seqid);
e31a1b66
BH		 731 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
732 if (status)
733 return status;
734 READ_BUF(16);
1da177e4
LT		 735 READ64(locku->lu_offset);
736 READ64(locku->lu_length);
737
738 DECODE_TAIL;
739}
740
b37ad28b 741static __be32
1da177e4
LT		 742nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
743{
744 DECODE_HEAD;
745
746 READ_BUF(4);
747 READ32(lookup->lo_len);
748 READ_BUF(lookup->lo_len);
749 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 750 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 751 return status;
752
753 DECODE_TAIL;
754}
755
2c8bd7e0 756static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 757{
758 __be32 *p;
759 u32 w;
760
761 READ_BUF(4);
762 READ32(w);
2c8bd7e0
BH		 763 *share_access = w & NFS4_SHARE_ACCESS_MASK;
764 *deleg_want = w & NFS4_SHARE_WANT_MASK;
765 if (deleg_when)
766 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
767
04f9e664
BF		 768 switch (w & NFS4_SHARE_ACCESS_MASK) {
769 case NFS4_SHARE_ACCESS_READ:
770 case NFS4_SHARE_ACCESS_WRITE:
771 case NFS4_SHARE_ACCESS_BOTH:
772 break;
773 default:
774 return nfserr_bad_xdr;
775 }
fc0d14fe 776 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 777 if (!w)
778 return nfs_ok;
779 if (!argp->minorversion)
780 return nfserr_bad_xdr;
781 switch (w & NFS4_SHARE_WANT_MASK) {
782 case NFS4_SHARE_WANT_NO_PREFERENCE:
783 case NFS4_SHARE_WANT_READ_DELEG:
784 case NFS4_SHARE_WANT_WRITE_DELEG:
785 case NFS4_SHARE_WANT_ANY_DELEG:
786 case NFS4_SHARE_WANT_NO_DELEG:
787 case NFS4_SHARE_WANT_CANCEL:
788 break;
789 default:
790 return nfserr_bad_xdr;
791 }
92bac8c5 792 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 793 if (!w)
794 return nfs_ok;
2c8bd7e0
BH		 795
796 if (!deleg_when) /* open_downgrade */
797 return nfserr_inval;
04f9e664
BF		 798 switch (w) {
799 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
800 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 801 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
802 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 803 return nfs_ok;
804 }
805xdr_error:
806 return nfserr_bad_xdr;
807}
808
809static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
810{
811 __be32 *p;
812
813 READ_BUF(4);
814 READ32(*x);
815 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 816 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 817 return nfserr_bad_xdr;
818 return nfs_ok;
819xdr_error:
820 return nfserr_bad_xdr;
821}
822
a084daf5
BF		 823static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
824{
825 __be32 *p;
826
827 READ_BUF(4);
828 READ32(o->len);
829
830 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
831 return nfserr_bad_xdr;
832
833 READ_BUF(o->len);
834 SAVEMEM(o->data, o->len);
835 return nfs_ok;
836xdr_error:
837 return nfserr_bad_xdr;
838}
839
b37ad28b 840static __be32
1da177e4
LT		 841nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
842{
843 DECODE_HEAD;
2c8bd7e0 844 u32 dummy;
1da177e4
LT		 845
846 memset(open->op_bmval, 0, sizeof(open->op_bmval));
847 open->op_iattr.ia_valid = 0;
fe0750e5 848 open->op_openowner = NULL;
1da177e4 849
9d313b17 850 open->op_xdr_error = 0;
1da177e4 851 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 852 READ_BUF(4);
1da177e4 853 READ32(open->op_seqid);
2c8bd7e0
BH		 854 /* decode, yet ignore deleg_when until supported */
855 status = nfsd4_decode_share_access(argp, &open->op_share_access,
856 &open->op_deleg_want, &dummy);
04f9e664
BF		 857 if (status)
858 goto xdr_error;
859 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
860 if (status)
861 goto xdr_error;
a084daf5 862 READ_BUF(sizeof(clientid_t));
1da177e4 863 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 864 status = nfsd4_decode_opaque(argp, &open->op_owner);
865 if (status)
866 goto xdr_error;
867 READ_BUF(4);
1da177e4
LT		 868 READ32(open->op_create);
869 switch (open->op_create) {
870 case NFS4_OPEN_NOCREATE:
871 break;
872 case NFS4_OPEN_CREATE:
873 READ_BUF(4);
874 READ32(open->op_createmode);
875 switch (open->op_createmode) {
876 case NFS4_CREATE_UNCHECKED:
877 case NFS4_CREATE_GUARDED:
c0d6fc8a 878 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 879 &open->op_iattr, &open->op_acl, &open->op_label);
c0d6fc8a 880 if (status)
1da177e4
LT		 881 goto out;
882 break;
883 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 884 READ_BUF(NFS4_VERIFIER_SIZE);
885 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 886 break;
79fb54ab
BH		 887 case NFS4_CREATE_EXCLUSIVE4_1:
888 if (argp->minorversion < 1)
889 goto xdr_error;
ab4684d1
CL		 890 READ_BUF(NFS4_VERIFIER_SIZE);
891 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 892 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 893 &open->op_iattr, &open->op_acl, &open->op_label);
79fb54ab
BH		 894 if (status)
895 goto out;
896 break;
1da177e4
LT		 897 default:
898 goto xdr_error;
899 }
900 break;
901 default:
902 goto xdr_error;
903 }
904
905 /* open_claim */
906 READ_BUF(4);
907 READ32(open->op_claim_type);
908 switch (open->op_claim_type) {
909 case NFS4_OPEN_CLAIM_NULL:
910 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
911 READ_BUF(4);
912 READ32(open->op_fname.len);
913 READ_BUF(open->op_fname.len);
914 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 915 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 916 return status;
917 break;
918 case NFS4_OPEN_CLAIM_PREVIOUS:
919 READ_BUF(4);
920 READ32(open->op_delegate_type);
921 break;
922 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 923 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
924 if (status)
925 return status;
926 READ_BUF(4);
1da177e4
LT		 927 READ32(open->op_fname.len);
928 READ_BUF(open->op_fname.len);
929 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 930 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 931 return status;
932 break;
8b289b2c
BF		 933 case NFS4_OPEN_CLAIM_FH:
934 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
935 if (argp->minorversion < 1)
936 goto xdr_error;
937 /* void */
938 break;
939 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
940 if (argp->minorversion < 1)
941 goto xdr_error;
942 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
943 if (status)
944 return status;
945 break;
1da177e4
LT		 946 default:
947 goto xdr_error;
948 }
949
950 DECODE_TAIL;
951}
952
b37ad28b 953static __be32
1da177e4
LT		 954nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
955{
956 DECODE_HEAD;
e1a90ebd
AS		 957
958 if (argp->minorversion >= 1)
959 return nfserr_notsupp;
960
e31a1b66
BH		 961 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
962 if (status)
963 return status;
964 READ_BUF(4);
1da177e4 965 READ32(open_conf->oc_seqid);
e1a90ebd 966
1da177e4
LT		 967 DECODE_TAIL;
968}
969
b37ad28b 970static __be32
1da177e4
LT		 971nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
972{
973 DECODE_HEAD;
974
e31a1b66
BH		 975 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
976 if (status)
977 return status;
04f9e664 978 READ_BUF(4);
1da177e4 979 READ32(open_down->od_seqid);
2c8bd7e0
BH		 980 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
981 &open_down->od_deleg_want, NULL);
04f9e664
BF		 982 if (status)
983 return status;
984 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
985 if (status)
986 return status;
1da177e4
LT		 987 DECODE_TAIL;
988}
989
b37ad28b 990static __be32
1da177e4
LT		 991nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
992{
993 DECODE_HEAD;
994
995 READ_BUF(4);
996 READ32(putfh->pf_fhlen);
997 if (putfh->pf_fhlen > NFS4_FHSIZE)
998 goto xdr_error;
999 READ_BUF(putfh->pf_fhlen);
1000 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1001
1002 DECODE_TAIL;
1003}
1004
e1a90ebd
AS		 1005static __be32
1006nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1007{
1008 if (argp->minorversion == 0)
1009 return nfs_ok;
1010 return nfserr_notsupp;
1011}
1012
b37ad28b 1013static __be32
1da177e4
LT		 1014nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1015{
1016 DECODE_HEAD;
1017
e31a1b66
BH		 1018 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1019 if (status)
1020 return status;
1021 READ_BUF(12);
1da177e4
LT		 1022 READ64(read->rd_offset);
1023 READ32(read->rd_length);
1024
1025 DECODE_TAIL;
1026}
1027
b37ad28b 1028static __be32
1da177e4
LT		 1029nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1030{
1031 DECODE_HEAD;
1032
1033 READ_BUF(24);
1034 READ64(readdir->rd_cookie);
1035 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
3b299709 1036 READ32(readdir->rd_dircount);
1da177e4
LT		 1037 READ32(readdir->rd_maxcount);
1038 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1039 goto out;
1040
1041 DECODE_TAIL;
1042}
1043
b37ad28b 1044static __be32
1da177e4
LT		 1045nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1046{
1047 DECODE_HEAD;
1048
1049 READ_BUF(4);
1050 READ32(remove->rm_namelen);
1051 READ_BUF(remove->rm_namelen);
1052 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1053 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1054 return status;
1055
1056 DECODE_TAIL;
1057}
1058
b37ad28b 1059static __be32
1da177e4
LT		 1060nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1061{
1062 DECODE_HEAD;
1063
1064 READ_BUF(4);
1065 READ32(rename->rn_snamelen);
1066 READ_BUF(rename->rn_snamelen + 4);
1067 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1068 READ32(rename->rn_tnamelen);
1069 READ_BUF(rename->rn_tnamelen);
1070 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1071 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1072 return status;
a36b1725 1073 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1074 return status;
1075
1076 DECODE_TAIL;
1077}
1078
b37ad28b 1079static __be32
1da177e4
LT		 1080nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1081{
1082 DECODE_HEAD;
1083
e1a90ebd
AS		 1084 if (argp->minorversion >= 1)
1085 return nfserr_notsupp;
1086
1da177e4
LT		 1087 READ_BUF(sizeof(clientid_t));
1088 COPYMEM(clientid, sizeof(clientid_t));
1089
1090 DECODE_TAIL;
1091}
1092
dcb488a3
AA		 1093static __be32
1094nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1095 struct nfsd4_secinfo *secinfo)
1096{
1097 DECODE_HEAD;
1098
1099 READ_BUF(4);
1100 READ32(secinfo->si_namelen);
1101 READ_BUF(secinfo->si_namelen);
1102 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1103 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1104 if (status)
1105 return status;
1106 DECODE_TAIL;
1107}
1108
04f4ad16
BF		 1109static __be32
1110nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1111 struct nfsd4_secinfo_no_name *sin)
1112{
1113 DECODE_HEAD;
1114
1115 READ_BUF(4);
1116 READ32(sin->sin_style);
1117 DECODE_TAIL;
1118}
1119
b37ad28b 1120static __be32
1da177e4
LT		 1121nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1122{
e31a1b66 1123 __be32 status;
1da177e4 1124
e31a1b66
BH		 1125 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1126 if (status)
1127 return status;
3c8e0316 1128 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
18032ca0 1129 &setattr->sa_acl, &setattr->sa_label);
1da177e4
LT		 1130}
1131
b37ad28b 1132static __be32
1da177e4
LT		 1133nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1134{
1135 DECODE_HEAD;
1136
e1a90ebd
AS		 1137 if (argp->minorversion >= 1)
1138 return nfserr_notsupp;
1139
ab4684d1
CL		 1140 READ_BUF(NFS4_VERIFIER_SIZE);
1141 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1142
a084daf5
BF		 1143 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1144 if (status)
1145 return nfserr_bad_xdr;
1146 READ_BUF(8);
1da177e4
LT		 1147 READ32(setclientid->se_callback_prog);
1148 READ32(setclientid->se_callback_netid_len);
1149
1150 READ_BUF(setclientid->se_callback_netid_len + 4);
1151 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1152 READ32(setclientid->se_callback_addr_len);
1153
1154 READ_BUF(setclientid->se_callback_addr_len + 4);
1155 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1156 READ32(setclientid->se_callback_ident);
1157
1158 DECODE_TAIL;
1159}
1160
b37ad28b 1161static __be32
1da177e4
LT		 1162nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1163{
1164 DECODE_HEAD;
1165
e1a90ebd
AS		 1166 if (argp->minorversion >= 1)
1167 return nfserr_notsupp;
1168
ab4684d1 1169 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1170 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1171 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1172
1173 DECODE_TAIL;
1174}
1175
1176/* Also used for NVERIFY */
b37ad28b 1177static __be32
1da177e4
LT		 1178nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1179{
1da177e4
LT		 1180 DECODE_HEAD;
1181
1182 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1183 goto out;
1184
1185 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1186 * nfsd4_proc_verify */
1187
1da177e4
LT		 1188 READ_BUF(4);
1189 READ32(verify->ve_attrlen);
1190 READ_BUF(verify->ve_attrlen);
1191 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1192
1193 DECODE_TAIL;
1194}
1195
b37ad28b 1196static __be32
1da177e4
LT		 1197nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1198{
1199 int avail;
1da177e4
LT		 1200 int len;
1201 DECODE_HEAD;
1202
e31a1b66
BH		 1203 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1204 if (status)
1205 return status;
1206 READ_BUF(16);
1da177e4
LT		 1207 READ64(write->wr_offset);
1208 READ32(write->wr_stable_how);
1209 if (write->wr_stable_how > 2)
1210 goto xdr_error;
1211 READ32(write->wr_buflen);
1212
1213 /* Sorry .. no magic macros for this.. *
1214 * READ_BUF(write->wr_buflen);
1215 * SAVEMEM(write->wr_buf, write->wr_buflen);
1216 */
1217 avail = (char*)argp->end - (char*)argp->p;
1218 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1219 dprintk("NFSD: xdr error (%s:%d)\n",
1220 __FILE__, __LINE__);
1da177e4
LT		 1221 goto xdr_error;
1222 }
70cc7f75
BF		 1223 write->wr_head.iov_base = p;
1224 write->wr_head.iov_len = avail;
70cc7f75 1225 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1226
1227 len = XDR_QUADLEN(write->wr_buflen) << 2;
1228 if (len >= avail) {
1229 int pages;
1230
1231 len -= avail;
1232
1233 pages = len >> PAGE_SHIFT;
1234 argp->pagelist += pages;
1235 argp->pagelen -= pages * PAGE_SIZE;
1236 len -= pages * PAGE_SIZE;
1237
1238 argp->p = (__be32 *)page_address(argp->pagelist[0]);
365da4ad 1239 argp->pagelist++;
5a80a54d 1240 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1241 }
5a80a54d 1242 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1243
1244 DECODE_TAIL;
1245}
1246
b37ad28b 1247static __be32
1da177e4
LT		 1248nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1249{
1250 DECODE_HEAD;
1251
e1a90ebd
AS		 1252 if (argp->minorversion >= 1)
1253 return nfserr_notsupp;
1254
1da177e4
LT		 1255 READ_BUF(12);
1256 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1257 READ32(rlockowner->rl_owner.len);
1258 READ_BUF(rlockowner->rl_owner.len);
1259 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1260
60adfc50
AA		 1261 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1262 return nfserr_inval;
1da177e4
LT		 1263 DECODE_TAIL;
1264}
1265
2db134eb
AA		 1266static __be32
1267nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1268 struct nfsd4_exchange_id *exid)
2db134eb 1269{
5afa040b 1270 int dummy, tmp;
0733d213
AA		 1271 DECODE_HEAD;
1272
1273 READ_BUF(NFS4_VERIFIER_SIZE);
1274 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1275
a084daf5
BF		 1276 status = nfsd4_decode_opaque(argp, &exid->clname);
1277 if (status)
1278 return nfserr_bad_xdr;
0733d213
AA		 1279
1280 READ_BUF(4);
1281 READ32(exid->flags);
1282
1283 /* Ignore state_protect4_a */
1284 READ_BUF(4);
1285 READ32(exid->spa_how);
1286 switch (exid->spa_how) {
1287 case SP4_NONE:
1288 break;
1289 case SP4_MACH_CRED:
1290 /* spo_must_enforce */
1291 READ_BUF(4);
1292 READ32(dummy);
1293 READ_BUF(dummy * 4);
1294 p += dummy;
1295
1296 /* spo_must_allow */
1297 READ_BUF(4);
1298 READ32(dummy);
1299 READ_BUF(dummy * 4);
1300 p += dummy;
1301 break;
1302 case SP4_SSV:
1303 /* ssp_ops */
1304 READ_BUF(4);
1305 READ32(dummy);
1306 READ_BUF(dummy * 4);
1307 p += dummy;
1308
1309 READ_BUF(4);
1310 READ32(dummy);
1311 READ_BUF(dummy * 4);
1312 p += dummy;
1313
1314 /* ssp_hash_algs<> */
1315 READ_BUF(4);
5afa040b
MJ		 1316 READ32(tmp);
1317 while (tmp--) {
1318 READ_BUF(4);
1319 READ32(dummy);
1320 READ_BUF(dummy);
1321 p += XDR_QUADLEN(dummy);
1322 }
0733d213
AA		 1323
1324 /* ssp_encr_algs<> */
1325 READ_BUF(4);
5afa040b
MJ		 1326 READ32(tmp);
1327 while (tmp--) {
1328 READ_BUF(4);
1329 READ32(dummy);
1330 READ_BUF(dummy);
1331 p += XDR_QUADLEN(dummy);
1332 }
0733d213
AA		 1333
1334 /* ssp_window and ssp_num_gss_handles */
1335 READ_BUF(8);
1336 READ32(dummy);
1337 READ32(dummy);
1338 break;
1339 default:
1340 goto xdr_error;
1341 }
1342
1343 /* Ignore Implementation ID */
1344 READ_BUF(4); /* nfs_impl_id4 array length */
1345 READ32(dummy);
1346
1347 if (dummy > 1)
1348 goto xdr_error;
1349
1350 if (dummy == 1) {
1351 /* nii_domain */
1352 READ_BUF(4);
1353 READ32(dummy);
1354 READ_BUF(dummy);
1355 p += XDR_QUADLEN(dummy);
1356
1357 /* nii_name */
1358 READ_BUF(4);
1359 READ32(dummy);
1360 READ_BUF(dummy);
1361 p += XDR_QUADLEN(dummy);
1362
1363 /* nii_date */
1364 READ_BUF(12);
1365 p += 3;
1366 }
1367 DECODE_TAIL;
2db134eb
AA		 1368}
1369
1370static __be32
1371nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1372 struct nfsd4_create_session *sess)
1373{
ec6b5d7b 1374 DECODE_HEAD;
ec6b5d7b 1375 u32 dummy;
ec6b5d7b
AA		 1376
1377 READ_BUF(16);
1378 COPYMEM(&sess->clientid, 8);
1379 READ32(sess->seqid);
1380 READ32(sess->flags);
1381
1382 /* Fore channel attrs */
1383 READ_BUF(28);
1384 READ32(dummy); /* headerpadsz is always 0 */
1385 READ32(sess->fore_channel.maxreq_sz);
1386 READ32(sess->fore_channel.maxresp_sz);
1387 READ32(sess->fore_channel.maxresp_cached);
1388 READ32(sess->fore_channel.maxops);
1389 READ32(sess->fore_channel.maxreqs);
1390 READ32(sess->fore_channel.nr_rdma_attrs);
1391 if (sess->fore_channel.nr_rdma_attrs == 1) {
1392 READ_BUF(4);
1393 READ32(sess->fore_channel.rdma_attrs);
1394 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1395 dprintk("Too many fore channel attr bitmaps!\n");
1396 goto xdr_error;
1397 }
1398
1399 /* Back channel attrs */
1400 READ_BUF(28);
1401 READ32(dummy); /* headerpadsz is always 0 */
1402 READ32(sess->back_channel.maxreq_sz);
1403 READ32(sess->back_channel.maxresp_sz);
1404 READ32(sess->back_channel.maxresp_cached);
1405 READ32(sess->back_channel.maxops);
1406 READ32(sess->back_channel.maxreqs);
1407 READ32(sess->back_channel.nr_rdma_attrs);
1408 if (sess->back_channel.nr_rdma_attrs == 1) {
1409 READ_BUF(4);
1410 READ32(sess->back_channel.rdma_attrs);
1411 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1412 dprintk("Too many back channel attr bitmaps!\n");
1413 goto xdr_error;
1414 }
1415
acb2887e 1416 READ_BUF(4);
ec6b5d7b 1417 READ32(sess->callback_prog);
acb2887e 1418 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1419 DECODE_TAIL;
2db134eb
AA		 1420}
1421
1422static __be32
1423nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1424 struct nfsd4_destroy_session *destroy_session)
1425{
e10e0cfc
BH		 1426 DECODE_HEAD;
1427 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1428 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1429
1430 DECODE_TAIL;
2db134eb
AA		 1431}
1432
e1ca12df
BS		 1433static __be32
1434nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1435 struct nfsd4_free_stateid *free_stateid)
1436{
1437 DECODE_HEAD;
1438
1439 READ_BUF(sizeof(stateid_t));
1440 READ32(free_stateid->fr_stateid.si_generation);
1441 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1442
1443 DECODE_TAIL;
1444}
1445
2db134eb
AA		 1446static __be32
1447nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1448 struct nfsd4_sequence *seq)
1449{
b85d4c01
BH		 1450 DECODE_HEAD;
1451
1452 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1453 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1454 READ32(seq->seqid);
1455 READ32(seq->slotid);
1456 READ32(seq->maxslots);
1457 READ32(seq->cachethis);
1458
1459 DECODE_TAIL;
2db134eb
AA		 1460}
1461
17456804
BS		 1462static __be32
1463nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1464{
17456804 1465 int i;
03cfb420
BS		 1466 __be32 *p, status;
1467 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1468
1469 READ_BUF(4);
1470 test_stateid->ts_num_ids = ntohl(*p++);
1471
03cfb420 1472 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1473
1474 for (i = 0; i < test_stateid->ts_num_ids; i++) {
03cfb420
BS		 1475 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1476 if (!stateid) {
afcf6792 1477 status = nfserrno(-ENOMEM);
03cfb420
BS		 1478 goto out;
1479 }
1480
1481 defer_free(argp, kfree, stateid);
1482 INIT_LIST_HEAD(&stateid->ts_id_list);
1483 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1484
1485 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1486 if (status)
03cfb420 1487 goto out;
17456804
BS		 1488 }
1489
1490 status = 0;
1491out:
1492 return status;
1493xdr_error:
1494 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1495 status = nfserr_bad_xdr;
1496 goto out;
1497}
1498
345c2842
MJ		 1499static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1500{
1501 DECODE_HEAD;
1502
1503 READ_BUF(8);
1504 COPYMEM(&dc->clientid, 8);
1505
1506 DECODE_TAIL;
1507}
1508
4dc6ec00
BF		 1509static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1510{
1511 DECODE_HEAD;
1512
1513 READ_BUF(4);
1514 READ32(rc->rca_one_fs);
1515
1516 DECODE_TAIL;
1517}
1518
347e0ad9
BH		 1519static __be32
1520nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1521{
1522 return nfs_ok;
1523}
1524
3c375c6f
BH		 1525static __be32
1526nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1527{
1e685ec2 1528 return nfserr_notsupp;
3c375c6f
BH		 1529}
1530
347e0ad9
BH		 1531typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1532
1533static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1534 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1535 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1536 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1537 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1538 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1539 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1540 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1541 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1542 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1543 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1544 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1545 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1546 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1547 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1548 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1549 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1550 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1551 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1552 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1553 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1554 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1555 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1556 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1557 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1558 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1559 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1560 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1561 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1562 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1563 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1564 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1565 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1566 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1567 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1568 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1569 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1570 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1571
1572 /* new operations for NFSv4.1 */
cb73a9f4 1573 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1574 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1575 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1576 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1577 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1578 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1579 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1580 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1581 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1582 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1583 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1584 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1585 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1586 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1587 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1588 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1589 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1590 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1591 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1592};
1593
e1a90ebd
AS		 1594static inline bool
1595nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1596{
8217d146 1597 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1598 return false;
8217d146 1599 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1600 return false;
8217d146
AS		 1601 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1602 return false;
1603 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1604 return false;
1605 return true;
1606}
f2feb96b 1607
b37ad28b 1608static __be32
1da177e4
LT		 1609nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1610{
1611 DECODE_HEAD;
1612 struct nfsd4_op *op;
1091006c 1613 bool cachethis = false;
a5cddc88
BF		 1614 int auth_slack= argp->rqstp->rq_auth_slack;
1615 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 1616 int readcount = 0;
1617 int readbytes = 0;
1da177e4
LT		 1618 int i;
1619
1da177e4
LT		 1620 READ_BUF(4);
1621 READ32(argp->taglen);
1622 READ_BUF(argp->taglen + 8);
1623 SAVEMEM(argp->tag, argp->taglen);
1624 READ32(argp->minorversion);
1625 READ32(argp->opcnt);
4f0cefbf 1626 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 1627
1628 if (argp->taglen > NFSD4_MAX_TAGLEN)
1629 goto xdr_error;
1630 if (argp->opcnt > 100)
1631 goto xdr_error;
1632
e8c96f8c 1633 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1634 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1635 if (!argp->ops) {
1636 argp->ops = argp->iops;
817cb9d4 1637 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1638 goto xdr_error;
1639 }
1640 }
1641
e1a90ebd 1642 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1643 argp->opcnt = 0;
1644
1da177e4
LT		 1645 for (i = 0; i < argp->opcnt; i++) {
1646 op = &argp->ops[i];
1647 op->replay = NULL;
1648
8a61b18c
BF		 1649 READ_BUF(4);
1650 READ32(op->opnum);
1da177e4 1651
e1a90ebd
AS		 1652 if (nfsd4_opnum_in_range(argp, op))
1653 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1654 else {
1da177e4
LT		 1655 op->opnum = OP_ILLEGAL;
1656 op->status = nfserr_op_illegal;
1da177e4 1657 }
1091006c
BF		 1658 /*
1659 * We'll try to cache the result in the DRC if any one
1660 * op in the compound wants to be cached:
1661 */
1662 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 1663
b0e35fda
BF		 1664 if (op->opnum == OP_READ) {
1665 readcount++;
1666 readbytes += nfsd4_max_reply(argp->rqstp, op);
1667 } else
1668 max_reply += nfsd4_max_reply(argp->rqstp, op);
e372ba60
BF		 1669
1670 if (op->status) {
1671 argp->opcnt = i+1;
1672 break;
1673 }
1da177e4 1674 }
1091006c
BF		 1675 /* Sessions make the DRC unnecessary: */
1676 if (argp->minorversion)
1677 cachethis = false;
b0e35fda 1678 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 1679 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 1680
a5cddc88 1681 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
b0e35fda
BF		 1682 argp->rqstp->rq_splice_ok = false;
1683
1da177e4
LT		 1684 DECODE_TAIL;
1685}
1da177e4 1686
d05d5744 1687static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
c654b8a9
BF		 1688{
1689 if (IS_I_VERSION(inode)) {
d05d5744 1690 p = xdr_encode_hyper(p, inode->i_version);
c654b8a9 1691 } else {
d05d5744
BF		 1692 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1693 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
c654b8a9 1694 }
d05d5744 1695 return p;
c654b8a9
BF		 1696}
1697
d05d5744 1698static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 1699{
d05d5744 1700 *p++ = cpu_to_be32(c->atomic);
c654b8a9 1701 if (c->change_supported) {
d05d5744
BF		 1702 p = xdr_encode_hyper(p, c->before_change);
1703 p = xdr_encode_hyper(p, c->after_change);
c654b8a9 1704 } else {
d05d5744
BF		 1705 *p++ = cpu_to_be32(c->before_ctime_sec);
1706 *p++ = cpu_to_be32(c->before_ctime_nsec);
1707 *p++ = cpu_to_be32(c->after_ctime_sec);
1708 *p++ = cpu_to_be32(c->after_ctime_nsec);
c654b8a9 1709 }
d05d5744 1710 return p;
c654b8a9 1711}
1da177e4 1712
81c3f413 1713/* Encode as an array of strings the string given with components
e7a0444a 1714 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1715 */
ddd1ea56
BF		 1716static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1717 char *components, char esc_enter,
1718 char esc_exit)
81c3f413 1719{
ddd1ea56 1720 __be32 *p;
082d4bd7
BF		 1721 __be32 pathlen;
1722 int pathlen_offset;
81c3f413 1723 int strlen, count=0;
e7a0444a 1724 char *str, *end, *next;
81c3f413
BF		 1725
1726 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 1727
1728 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 1729 p = xdr_reserve_space(xdr, 4);
1730 if (!p)
81c3f413 1731 return nfserr_resource;
082d4bd7
BF		 1732 p++; /* We will fill this in with @count later */
1733
81c3f413
BF		 1734 end = str = components;
1735 while (*end) {
e7a0444a
WAA		 1736 bool found_esc = false;
1737
1738 /* try to parse as esc_start, ..., esc_end, sep */
1739 if (*str == esc_enter) {
1740 for (; *end && (*end != esc_exit); end++)
1741 /* find esc_exit or end of string */;
1742 next = end + 1;
1743 if (*end && (!*next || *next == sep)) {
1744 str++;
1745 found_esc = true;
1746 }
1747 }
1748
1749 if (!found_esc)
1750 for (; *end && (*end != sep); end++)
1751 /* find sep or end of string */;
1752
81c3f413
BF		 1753 strlen = end - str;
1754 if (strlen) {
ddd1ea56
BF		 1755 p = xdr_reserve_space(xdr, strlen + 4);
1756 if (!p)
81c3f413 1757 return nfserr_resource;
0c0c267b 1758 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 1759 count++;
1760 }
1761 else
1762 end++;
1763 str = end;
1764 }
082d4bd7
BF		 1765 pathlen = htonl(xdr->buf->len - pathlen_offset);
1766 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 1767 return 0;
1768}
1769
e7a0444a
WAA		 1770/* Encode as an array of strings the string given with components
1771 * separated @sep.
1772 */
ddd1ea56
BF		 1773static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1774 char *components)
e7a0444a 1775{
ddd1ea56 1776 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 1777}
1778
81c3f413
BF		 1779/*
1780 * encode a location element of a fs_locations structure
1781 */
ddd1ea56
BF		 1782static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1783 struct nfsd4_fs_location *location)
81c3f413 1784{
b37ad28b 1785 __be32 status;
81c3f413 1786
ddd1ea56 1787 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 1788 '[', ']');
81c3f413
BF		 1789 if (status)
1790 return status;
ddd1ea56 1791 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 1792 if (status)
1793 return status;
81c3f413
BF		 1794 return 0;
1795}
1796
1797/*
ed748aac 1798 * Encode a path in RFC3530 'pathname4' format
81c3f413 1799 */
ddd1ea56
BF		 1800static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1801 const struct path *root,
1802 const struct path *path)
81c3f413 1803{
301f0268 1804 struct path cur = *path;
ddd1ea56 1805 __be32 *p;
ed748aac
TM		 1806 struct dentry **components = NULL;
1807 unsigned int ncomponents = 0;
1808 __be32 err = nfserr_jukebox;
81c3f413 1809
ed748aac 1810 dprintk("nfsd4_encode_components(");
81c3f413 1811
ed748aac
TM		 1812 path_get(&cur);
1813 /* First walk the path up to the nfsd root, and store the
1814 * dentries/path components in an array.
1815 */
1816 for (;;) {
1817 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1818 break;
1819 if (cur.dentry == cur.mnt->mnt_root) {
1820 if (follow_up(&cur))
1821 continue;
1822 goto out_free;
1823 }
1824 if ((ncomponents & 15) == 0) {
1825 struct dentry **new;
1826 new = krealloc(components,
1827 sizeof(*new) * (ncomponents + 16),
1828 GFP_KERNEL);
1829 if (!new)
1830 goto out_free;
1831 components = new;
1832 }
1833 components[ncomponents++] = cur.dentry;
1834 cur.dentry = dget_parent(cur.dentry);
1835 }
ddd1ea56
BF		 1836 err = nfserr_resource;
1837 p = xdr_reserve_space(xdr, 4);
1838 if (!p)
ed748aac 1839 goto out_free;
c373b0a4 1840 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 1841
1842 while (ncomponents) {
1843 struct dentry *dentry = components[ncomponents - 1];
301f0268 1844 unsigned int len;
ed748aac 1845
301f0268
AV		 1846 spin_lock(&dentry->d_lock);
1847 len = dentry->d_name.len;
ddd1ea56
BF		 1848 p = xdr_reserve_space(xdr, len + 4);
1849 if (!p) {
301f0268 1850 spin_unlock(&dentry->d_lock);
ed748aac 1851 goto out_free;
301f0268 1852 }
0c0c267b 1853 p = xdr_encode_opaque(p, dentry->d_name.name, len);
ed748aac 1854 dprintk("/%s", dentry->d_name.name);
301f0268 1855 spin_unlock(&dentry->d_lock);
ed748aac
TM		 1856 dput(dentry);
1857 ncomponents--;
81c3f413 1858 }
ed748aac 1859
ed748aac
TM		 1860 err = 0;
1861out_free:
1862 dprintk(")\n");
1863 while (ncomponents)
1864 dput(components[--ncomponents]);
1865 kfree(components);
1866 path_put(&cur);
1867 return err;
1868}
1869
ddd1ea56
BF		 1870static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
1871 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 1872{
1873 struct svc_export *exp_ps;
1874 __be32 res;
1875
1876 exp_ps = rqst_find_fsidzero_export(rqstp);
1877 if (IS_ERR(exp_ps))
1878 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 1879 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 1880 exp_put(exp_ps);
1881 return res;
81c3f413
BF		 1882}
1883
1884/*
1885 * encode a fs_locations structure
1886 */
ddd1ea56
BF		 1887static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
1888 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 1889{
b37ad28b 1890 __be32 status;
cc45f017 1891 int i;
ddd1ea56 1892 __be32 *p;
81c3f413 1893 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1894
ddd1ea56 1895 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 1896 if (status)
1897 return status;
ddd1ea56
BF		 1898 p = xdr_reserve_space(xdr, 4);
1899 if (!p)
81c3f413 1900 return nfserr_resource;
c373b0a4 1901 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 1902 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 1903 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 1904 if (status)
1905 return status;
1906 }
81c3f413
BF		 1907 return 0;
1908}
1da177e4 1909
3d2544b1
BF		 1910static u32 nfs4_file_type(umode_t mode)
1911{
1912 switch (mode & S_IFMT) {
1913 case S_IFIFO: return NF4FIFO;
1914 case S_IFCHR: return NF4CHR;
1915 case S_IFDIR: return NF4DIR;
1916 case S_IFBLK: return NF4BLK;
1917 case S_IFLNK: return NF4LNK;
1918 case S_IFREG: return NF4REG;
1919 case S_IFSOCK: return NF4SOCK;
1920 default: return NF4BAD;
1921 };
1922}
1da177e4 1923
b37ad28b 1924static inline __be32
ddd1ea56
BF		 1925nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1926 struct nfs4_ace *ace)
1da177e4 1927{
3554116d 1928 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 1929 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 1930 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 1931 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 1932 else
ddd1ea56 1933 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 1934}
1935
42ca0993
BF		 1936#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1937 FATTR4_WORD0_RDATTR_ERROR)
1938#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1939
18032ca0
DQ		 1940#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1941static inline __be32
ddd1ea56
BF		 1942nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1943 void *context, int len)
18032ca0 1944{
ddd1ea56 1945 __be32 *p;
18032ca0 1946
ddd1ea56
BF		 1947 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
1948 if (!p)
18032ca0
DQ		 1949 return nfserr_resource;
1950
1951 /*
1952 * For now we use a 0 here to indicate the null translation; in
1953 * the future we may place a call to translation code here.
1954 */
c373b0a4
BF		 1955 *p++ = cpu_to_be32(0); /* lfs */
1956 *p++ = cpu_to_be32(0); /* pi */
18032ca0 1957 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 1958 return 0;
1959}
1960#else
1961static inline __be32
ddd1ea56
BF		 1962nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1963 void *context, int len)
18032ca0
DQ		 1964{ return 0; }
1965#endif
1966
b37ad28b 1967static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1968{
1969 /* As per referral draft: */
1970 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1971 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1972 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1973 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1974 *rdattr_err = NFSERR_MOVED;
1975 else
1976 return nfserr_moved;
1977 }
1978 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1979 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1980 return 0;
1981}
1da177e4 1982
ae7095a7
BF		 1983
1984static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
1985{
1986 struct path path = exp->ex_path;
1987 int err;
1988
1989 path_get(&path);
1990 while (follow_up(&path)) {
1991 if (path.dentry != path.mnt->mnt_root)
1992 break;
1993 }
3dadecce 1994 err = vfs_getattr(&path, stat);
ae7095a7
BF		 1995 path_put(&path);
1996 return err;
1997}
1998
1da177e4
LT		 1999/*
2000 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2001 * ourselves.
1da177e4 2002 */
da2ebce6 2003static __be32
d5184658
BF		 2004nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2005 struct svc_export *exp,
2006 struct dentry *dentry, u32 *bmval,
406a7ea9 2007 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2008{
2009 u32 bmval0 = bmval[0];
2010 u32 bmval1 = bmval[1];
7e705706 2011 u32 bmval2 = bmval[2];
1da177e4 2012 struct kstat stat;
d50e6136 2013 struct svc_fh *tempfh = NULL;
1da177e4 2014 struct kstatfs statfs;
ddd1ea56 2015 __be32 *p;
1fcea5b2 2016 int starting_len = xdr->buf->len;
082d4bd7
BF		 2017 int attrlen_offset;
2018 __be32 attrlen;
1da177e4
LT		 2019 u32 dummy;
2020 u64 dummy64;
42ca0993 2021 u32 rdattr_err = 0;
b37ad28b 2022 __be32 status;
b8dd7b9a 2023 int err;
1da177e4
LT		 2024 int aclsupport = 0;
2025 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2026 void *context = NULL;
2027 int contextlen;
2028 bool contextsupport = false;
7e705706
AA		 2029 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2030 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2031 struct path path = {
2032 .mnt = exp->ex_path.mnt,
2033 .dentry = dentry,
2034 };
3d733711 2035 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2036
2037 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2038 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2039 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2040 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2041
42ca0993 2042 if (exp->ex_fslocs.migrated) {
7e705706 2043 BUG_ON(bmval[2]);
42ca0993
BF		 2044 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2045 if (status)
2046 goto out;
2047 }
2048
3dadecce 2049 err = vfs_getattr(&path, &stat);
b8dd7b9a 2050 if (err)
1da177e4 2051 goto out_nfserr;
12337901
CH		 2052 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2053 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2054 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2055 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2056 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2057 if (err)
1da177e4
LT		 2058 goto out_nfserr;
2059 }
2060 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2061 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2062 status = nfserr_jukebox;
2063 if (!tempfh)
2064 goto out;
2065 fh_init(tempfh, NFS4_FHSIZE);
2066 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2067 if (status)
2068 goto out;
d50e6136 2069 fhp = tempfh;
1da177e4
LT		 2070 }
2071 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2072 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2073 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2074 aclsupport = (err == 0);
1da177e4 2075 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2076 if (err == -EOPNOTSUPP)
1da177e4 2077 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2078 else if (err == -EINVAL) {
1da177e4
LT		 2079 status = nfserr_attrnotsupp;
2080 goto out;
b8dd7b9a 2081 } else if (err != 0)
1da177e4
LT		 2082 goto out_nfserr;
2083 }
2084 }
1da177e4 2085
18032ca0
DQ		 2086#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2087 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2088 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2089 err = security_inode_getsecctx(dentry->d_inode,
2090 &context, &contextlen);
2091 contextsupport = (err == 0);
2092 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2093 if (err == -EOPNOTSUPP)
2094 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2095 else if (err)
2096 goto out_nfserr;
2097 }
2098 }
2099#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2100
2b44f1ba 2101 if (bmval2) {
ddd1ea56
BF		 2102 p = xdr_reserve_space(xdr, 16);
2103 if (!p)
2b44f1ba 2104 goto out_resource;
c373b0a4
BF		 2105 *p++ = cpu_to_be32(3);
2106 *p++ = cpu_to_be32(bmval0);
2107 *p++ = cpu_to_be32(bmval1);
2108 *p++ = cpu_to_be32(bmval2);
2b44f1ba 2109 } else if (bmval1) {
ddd1ea56
BF		 2110 p = xdr_reserve_space(xdr, 12);
2111 if (!p)
2b44f1ba 2112 goto out_resource;
c373b0a4
BF		 2113 *p++ = cpu_to_be32(2);
2114 *p++ = cpu_to_be32(bmval0);
2115 *p++ = cpu_to_be32(bmval1);
7e705706 2116 } else {
ddd1ea56
BF		 2117 p = xdr_reserve_space(xdr, 8);
2118 if (!p)
2b44f1ba 2119 goto out_resource;
c373b0a4
BF		 2120 *p++ = cpu_to_be32(1);
2121 *p++ = cpu_to_be32(bmval0);
7e705706 2122 }
082d4bd7
BF		 2123
2124 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2125 p = xdr_reserve_space(xdr, 4);
2126 if (!p)
2127 goto out_resource;
082d4bd7 2128 p++; /* to be backfilled later */
1da177e4
LT		 2129
2130 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2131 u32 word0 = nfsd_suppattrs0(minorversion);
2132 u32 word1 = nfsd_suppattrs1(minorversion);
2133 u32 word2 = nfsd_suppattrs2(minorversion);
2134
42ca0993
BF		 2135 if (!aclsupport)
2136 word0 &= ~FATTR4_WORD0_ACL;
18032ca0
DQ		 2137 if (!contextsupport)
2138 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
7e705706 2139 if (!word2) {
ddd1ea56
BF		 2140 p = xdr_reserve_space(xdr, 12);
2141 if (!p)
2b44f1ba 2142 goto out_resource;
c373b0a4
BF		 2143 *p++ = cpu_to_be32(2);
2144 *p++ = cpu_to_be32(word0);
2145 *p++ = cpu_to_be32(word1);
7e705706 2146 } else {
ddd1ea56
BF		 2147 p = xdr_reserve_space(xdr, 16);
2148 if (!p)
2b44f1ba 2149 goto out_resource;
c373b0a4
BF		 2150 *p++ = cpu_to_be32(3);
2151 *p++ = cpu_to_be32(word0);
2152 *p++ = cpu_to_be32(word1);
2153 *p++ = cpu_to_be32(word2);
7e705706 2154 }
1da177e4
LT		 2155 }
2156 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2157 p = xdr_reserve_space(xdr, 4);
2158 if (!p)
1da177e4 2159 goto out_resource;
3d2544b1 2160 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2161 if (dummy == NF4BAD) {
2162 status = nfserr_serverfault;
2163 goto out;
2164 }
c373b0a4 2165 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2166 }
2167 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2168 p = xdr_reserve_space(xdr, 4);
2169 if (!p)
1da177e4 2170 goto out_resource;
49640001 2171 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2172 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2173 else
c373b0a4
BF		 2174 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2175 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2176 }
2177 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2178 p = xdr_reserve_space(xdr, 8);
2179 if (!p)
1da177e4 2180 goto out_resource;
d05d5744 2181 p = encode_change(p, &stat, dentry->d_inode);
1da177e4
LT		 2182 }
2183 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2184 p = xdr_reserve_space(xdr, 8);
2185 if (!p)
1da177e4 2186 goto out_resource;
b64c7f3b 2187 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2188 }
2189 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2190 p = xdr_reserve_space(xdr, 4);
2191 if (!p)
1da177e4 2192 goto out_resource;
c373b0a4 2193 *p++ = cpu_to_be32(1);
1da177e4
LT		 2194 }
2195 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2196 p = xdr_reserve_space(xdr, 4);
2197 if (!p)
1da177e4 2198 goto out_resource;
c373b0a4 2199 *p++ = cpu_to_be32(1);
1da177e4
LT		 2200 }
2201 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2202 p = xdr_reserve_space(xdr, 4);
2203 if (!p)
1da177e4 2204 goto out_resource;
c373b0a4 2205 *p++ = cpu_to_be32(0);
1da177e4
LT		 2206 }
2207 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2208 p = xdr_reserve_space(xdr, 16);
2209 if (!p)
1da177e4 2210 goto out_resource;
42ca0993 2211 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 2212 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2213 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2214 } else switch(fsid_source(fhp)) {
2215 case FSIDSOURCE_FSID:
b64c7f3b
BF		 2216 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2217 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 2218 break;
2219 case FSIDSOURCE_DEV:
c373b0a4
BF		 2220 *p++ = cpu_to_be32(0);
2221 *p++ = cpu_to_be32(MAJOR(stat.dev));
2222 *p++ = cpu_to_be32(0);
2223 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 2224 break;
2225 case FSIDSOURCE_UUID:
94eb3689
KM		 2226 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2227 EX_UUID_LEN);
af6a4e28 2228 break;
1da177e4
LT		 2229 }
2230 }
2231 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2232 p = xdr_reserve_space(xdr, 4);
2233 if (!p)
1da177e4 2234 goto out_resource;
c373b0a4 2235 *p++ = cpu_to_be32(0);
1da177e4
LT		 2236 }
2237 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2238 p = xdr_reserve_space(xdr, 4);
2239 if (!p)
1da177e4 2240 goto out_resource;
c373b0a4 2241 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 2242 }
2243 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2244 p = xdr_reserve_space(xdr, 4);
2245 if (!p)
1da177e4 2246 goto out_resource;
c373b0a4 2247 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 2248 }
2249 if (bmval0 & FATTR4_WORD0_ACL) {
2250 struct nfs4_ace *ace;
1da177e4
LT		 2251
2252 if (acl == NULL) {
ddd1ea56
BF		 2253 p = xdr_reserve_space(xdr, 4);
2254 if (!p)
1da177e4
LT		 2255 goto out_resource;
2256
c373b0a4 2257 *p++ = cpu_to_be32(0);
1da177e4
LT		 2258 goto out_acl;
2259 }
ddd1ea56
BF		 2260 p = xdr_reserve_space(xdr, 4);
2261 if (!p)
1da177e4 2262 goto out_resource;
c373b0a4 2263 *p++ = cpu_to_be32(acl->naces);
1da177e4 2264
28e05dd8 2265 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2266 p = xdr_reserve_space(xdr, 4*3);
2267 if (!p)
1da177e4 2268 goto out_resource;
c373b0a4
BF		 2269 *p++ = cpu_to_be32(ace->type);
2270 *p++ = cpu_to_be32(ace->flag);
2271 *p++ = cpu_to_be32(ace->access_mask &
2272 NFS4_ACE_MASK_ALL);
ddd1ea56 2273 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2274 if (status)
2275 goto out;
2276 }
2277 }
2278out_acl:
2279 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2280 p = xdr_reserve_space(xdr, 4);
2281 if (!p)
1da177e4 2282 goto out_resource;
c373b0a4 2283 *p++ = cpu_to_be32(aclsupport ?
1da177e4
LT		 2284 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2285 }
2286 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2287 p = xdr_reserve_space(xdr, 4);
2288 if (!p)
1da177e4 2289 goto out_resource;
c373b0a4 2290 *p++ = cpu_to_be32(1);
1da177e4
LT		 2291 }
2292 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2293 p = xdr_reserve_space(xdr, 4);
2294 if (!p)
1da177e4 2295 goto out_resource;
c373b0a4 2296 *p++ = cpu_to_be32(0);
1da177e4
LT		 2297 }
2298 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2299 p = xdr_reserve_space(xdr, 4);
2300 if (!p)
1da177e4 2301 goto out_resource;
c373b0a4 2302 *p++ = cpu_to_be32(1);
1da177e4
LT		 2303 }
2304 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2305 p = xdr_reserve_space(xdr, 4);
2306 if (!p)
1da177e4 2307 goto out_resource;
c373b0a4 2308 *p++ = cpu_to_be32(1);
1da177e4
LT		 2309 }
2310 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2311 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2312 if (!p)
1da177e4 2313 goto out_resource;
0c0c267b
BF		 2314 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2315 fhp->fh_handle.fh_size);
1da177e4
LT		 2316 }
2317 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2318 p = xdr_reserve_space(xdr, 8);
2319 if (!p)
1da177e4 2320 goto out_resource;
b64c7f3b 2321 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 2322 }
2323 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2324 p = xdr_reserve_space(xdr, 8);
2325 if (!p)
1da177e4 2326 goto out_resource;
b64c7f3b 2327 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2328 }
2329 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2330 p = xdr_reserve_space(xdr, 8);
2331 if (!p)
1da177e4 2332 goto out_resource;
b64c7f3b 2333 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2334 }
2335 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2336 p = xdr_reserve_space(xdr, 8);
2337 if (!p)
1da177e4 2338 goto out_resource;
b64c7f3b 2339 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 2340 }
81c3f413 2341 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2342 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2343 if (status)
2344 goto out;
2345 }
1da177e4 2346 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2347 p = xdr_reserve_space(xdr, 4);
2348 if (!p)
1da177e4 2349 goto out_resource;
c373b0a4 2350 *p++ = cpu_to_be32(1);
1da177e4
LT		 2351 }
2352 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2353 p = xdr_reserve_space(xdr, 8);
2354 if (!p)
1da177e4 2355 goto out_resource;
b64c7f3b 2356 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2357 }
2358 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2359 p = xdr_reserve_space(xdr, 4);
2360 if (!p)
1da177e4 2361 goto out_resource;
c373b0a4 2362 *p++ = cpu_to_be32(255);
1da177e4
LT		 2363 }
2364 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2365 p = xdr_reserve_space(xdr, 4);
2366 if (!p)
1da177e4 2367 goto out_resource;
c373b0a4 2368 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 2369 }
2370 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2371 p = xdr_reserve_space(xdr, 8);
2372 if (!p)
1da177e4 2373 goto out_resource;
b64c7f3b 2374 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2375 }
2376 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2377 p = xdr_reserve_space(xdr, 8);
2378 if (!p)
1da177e4 2379 goto out_resource;
b64c7f3b 2380 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2381 }
2382 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2383 p = xdr_reserve_space(xdr, 4);
2384 if (!p)
1da177e4 2385 goto out_resource;
c373b0a4 2386 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 2387 }
2388 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2389 p = xdr_reserve_space(xdr, 4);
2390 if (!p)
1da177e4 2391 goto out_resource;
c373b0a4 2392 *p++ = cpu_to_be32(1);
1da177e4
LT		 2393 }
2394 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2395 p = xdr_reserve_space(xdr, 4);
2396 if (!p)
1da177e4 2397 goto out_resource;
c373b0a4 2398 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 2399 }
2400 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2401 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2402 if (status)
2403 goto out;
2404 }
2405 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2406 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2407 if (status)
2408 goto out;
2409 }
2410 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2411 p = xdr_reserve_space(xdr, 8);
2412 if (!p)
1da177e4 2413 goto out_resource;
c373b0a4
BF		 2414 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2415 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 2416 }
2417 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2418 p = xdr_reserve_space(xdr, 8);
2419 if (!p)
1da177e4
LT		 2420 goto out_resource;
2421 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 2422 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2423 }
2424 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2425 p = xdr_reserve_space(xdr, 8);
2426 if (!p)
1da177e4
LT		 2427 goto out_resource;
2428 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 2429 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2430 }
2431 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2432 p = xdr_reserve_space(xdr, 8);
2433 if (!p)
1da177e4
LT		 2434 goto out_resource;
2435 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 2436 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2437 }
2438 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2439 p = xdr_reserve_space(xdr, 8);
2440 if (!p)
1da177e4
LT		 2441 goto out_resource;
2442 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 2443 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2444 }
2445 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2446 p = xdr_reserve_space(xdr, 12);
2447 if (!p)
1da177e4 2448 goto out_resource;
b64c7f3b 2449 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 2450 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 2451 }
2452 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2453 p = xdr_reserve_space(xdr, 12);
2454 if (!p)
1da177e4 2455 goto out_resource;
c373b0a4
BF		 2456 *p++ = cpu_to_be32(0);
2457 *p++ = cpu_to_be32(1);
2458 *p++ = cpu_to_be32(0);
1da177e4
LT		 2459 }
2460 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2461 p = xdr_reserve_space(xdr, 12);
2462 if (!p)
1da177e4 2463 goto out_resource;
b64c7f3b 2464 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 2465 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 2466 }
2467 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2468 p = xdr_reserve_space(xdr, 12);
2469 if (!p)
1da177e4 2470 goto out_resource;
b64c7f3b 2471 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 2472 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 2473 }
2474 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
ddd1ea56
BF		 2475 p = xdr_reserve_space(xdr, 8);
2476 if (!p)
1da177e4 2477 goto out_resource;
406a7ea9
FF		 2478 /*
2479 * Get parent's attributes if not ignoring crossmount
2480 * and this is the root of a cross-mounted filesystem.
2481 */
2482 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2483 dentry == exp->ex_path.mnt->mnt_root)
2484 get_parent_attributes(exp, &stat);
b64c7f3b 2485 p = xdr_encode_hyper(p, stat.ino);
1da177e4 2486 }
18032ca0 2487 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
ddd1ea56
BF		 2488 status = nfsd4_encode_security_label(xdr, rqstp, context,
2489 contextlen);
18032ca0
DQ		 2490 if (status)
2491 goto out;
2492 }
8c18f205 2493 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
ddd1ea56
BF		 2494 p = xdr_reserve_space(xdr, 16);
2495 if (!p)
de3997a7 2496 goto out_resource;
c373b0a4
BF		 2497 *p++ = cpu_to_be32(3);
2498 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2499 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2500 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
8c18f205 2501 }
7e705706 2502
082d4bd7
BF		 2503 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2504 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2505 status = nfs_ok;
2506
2507out:
ba4e55bb 2508#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2509 if (context)
2510 security_release_secctx(context, contextlen);
ba4e55bb 2511#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2512 kfree(acl);
18df11d0 2513 if (tempfh) {
d50e6136 2514 fh_put(tempfh);
18df11d0
YZ		 2515 kfree(tempfh);
2516 }
1fcea5b2
BF		 2517 if (status)
2518 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2519 return status;
2520out_nfserr:
b8dd7b9a 2521 status = nfserrno(err);
1da177e4
LT		 2522 goto out;
2523out_resource:
1da177e4
LT		 2524 status = nfserr_resource;
2525 goto out;
1da177e4
LT		 2526}
2527
2825a7f9
BF		 2528static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2529 struct xdr_buf *buf, __be32 *p, int bytes)
2530{
2531 xdr->scratch.iov_len = 0;
2532 memset(buf, 0, sizeof(struct xdr_buf));
2533 buf->head[0].iov_base = p;
2534 buf->head[0].iov_len = 0;
2535 buf->len = 0;
2536 xdr->buf = buf;
2537 xdr->iov = buf->head;
2538 xdr->p = p;
2539 xdr->end = (void *)p + bytes;
2540 buf->buflen = bytes;
2541}
2542
d5184658
BF		 2543__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2544 struct svc_fh *fhp, struct svc_export *exp,
2545 struct dentry *dentry, u32 *bmval,
2546 struct svc_rqst *rqstp, int ignore_crossmnt)
2547{
2825a7f9 2548 struct xdr_buf dummy;
d5184658
BF		 2549 struct xdr_stream xdr;
2550 __be32 ret;
2551
2825a7f9 2552 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2553 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2554 ignore_crossmnt);
2555 *p = xdr.p;
2556 return ret;
2557}
2558
c0ce6ec8
BF		 2559static inline int attributes_need_mount(u32 *bmval)
2560{
2561 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2562 return 1;
2563 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2564 return 1;
2565 return 0;
2566}
2567
b37ad28b 2568static __be32
561f0ed4
BF		 2569nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2570 const char *name, int namlen)
1da177e4
LT		 2571{
2572 struct svc_export *exp = cd->rd_fhp->fh_export;
2573 struct dentry *dentry;
b37ad28b 2574 __be32 nfserr;
406a7ea9 2575 int ignore_crossmnt = 0;
1da177e4
LT		 2576
2577 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2578 if (IS_ERR(dentry))
2579 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2580 if (!dentry->d_inode) {
2581 /*
2582 * nfsd_buffered_readdir drops the i_mutex between
2583 * readdir and calling this callback, leaving a window
2584 * where this directory entry could have gone away.
2585 */
2586 dput(dentry);
2587 return nfserr_noent;
2588 }
1da177e4
LT		 2589
2590 exp_get(exp);
406a7ea9
FF		 2591 /*
2592 * In the case of a mountpoint, the client may be asking for
2593 * attributes that are only properties of the underlying filesystem
2594 * as opposed to the cross-mounted file system. In such a case,
2595 * we will not follow the cross mount and will fill the attribtutes
2596 * directly from the mountpoint dentry.
2597 */
3227fa41 2598 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2599 int err;
2600
3227fa41
BF		 2601 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2602 && !attributes_need_mount(cd->rd_bmval)) {
2603 ignore_crossmnt = 1;
2604 goto out_encode;
2605 }
dcb488a3
AA		 2606 /*
2607 * Why the heck aren't we just using nfsd_lookup??
2608 * Different "."/".." handling? Something else?
2609 * At least, add a comment here to explain....
2610 */
021d3a72
BF		 2611 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2612 if (err) {
2613 nfserr = nfserrno(err);
1da177e4
LT		 2614 goto out_put;
2615 }
dcb488a3
AA		 2616 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2617 if (nfserr)
2618 goto out_put;
1da177e4
LT		 2619
2620 }
3227fa41 2621out_encode:
561f0ed4 2622 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 2623 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2624out_put:
2625 dput(dentry);
2626 exp_put(exp);
2627 return nfserr;
2628}
2629
2ebbc012 2630static __be32 *
561f0ed4 2631nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 2632{
561f0ed4
BF		 2633 __be32 *p;
2634
2635 p = xdr_reserve_space(xdr, 6);
2636 if (!p)
1da177e4
LT		 2637 return NULL;
2638 *p++ = htonl(2);
2639 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2640 *p++ = htonl(0); /* bmval1 */
2641
87915c64 2642 *p++ = htonl(4); /* attribute length */
1da177e4 2643 *p++ = nfserr; /* no htonl */
1da177e4
LT		 2644 return p;
2645}
2646
2647static int
a0ad13ef
N		 2648nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2649 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2650{
a0ad13ef 2651 struct readdir_cd *ccd = ccdv;
1da177e4 2652 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 2653 struct xdr_stream *xdr = cd->xdr;
2654 int start_offset = xdr->buf->len;
2655 int cookie_offset;
2656 int entry_bytes;
b37ad28b 2657 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 2658 __be64 wire_offset;
2659 __be32 *p;
1da177e4
LT		 2660
2661 /* In nfsv4, "." and ".." never make it onto the wire.. */
2662 if (name && isdotent(name, namlen)) {
2663 cd->common.err = nfs_ok;
2664 return 0;
2665 }
2666
561f0ed4
BF		 2667 if (cd->cookie_offset) {
2668 wire_offset = cpu_to_be64(offset);
2669 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2670 &wire_offset, 8);
2671 }
1da177e4 2672
561f0ed4
BF		 2673 p = xdr_reserve_space(xdr, 4);
2674 if (!p)
1da177e4 2675 goto fail;
1da177e4 2676 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 2677 cookie_offset = xdr->buf->len;
2678 p = xdr_reserve_space(xdr, 3*4 + namlen);
2679 if (!p)
2680 goto fail;
1da177e4
LT		 2681 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2682 p = xdr_encode_array(p, name, namlen); /* name length & name */
2683
561f0ed4 2684 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 2685 switch (nfserr) {
2686 case nfs_ok:
1da177e4
LT		 2687 break;
2688 case nfserr_resource:
2689 nfserr = nfserr_toosmall;
2690 goto fail;
b2c0cea6
BF		 2691 case nfserr_noent:
2692 goto skip_entry;
1da177e4
LT		 2693 default:
2694 /*
2695 * If the client requested the RDATTR_ERROR attribute,
2696 * we stuff the error code into this attribute
2697 * and continue. If this attribute was not requested,
2698 * then in accordance with the spec, we fail the
2699 * entire READDIR operation(!)
2700 */
2701 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2702 goto fail;
561f0ed4 2703 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 2704 if (p == NULL) {
2705 nfserr = nfserr_toosmall;
1da177e4 2706 goto fail;
34081efc 2707 }
1da177e4 2708 }
561f0ed4
BF		 2709 nfserr = nfserr_toosmall;
2710 entry_bytes = xdr->buf->len - start_offset;
2711 if (entry_bytes > cd->rd_maxcount)
2712 goto fail;
2713 cd->rd_maxcount -= entry_bytes;
3b299709
BF		 2714 if (!cd->rd_dircount)
2715 goto fail;
2716 cd->rd_dircount--;
561f0ed4 2717 cd->cookie_offset = cookie_offset;
b2c0cea6 2718skip_entry:
1da177e4
LT		 2719 cd->common.err = nfs_ok;
2720 return 0;
2721fail:
561f0ed4 2722 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 2723 cd->common.err = nfserr;
2724 return -EINVAL;
2725}
2726
d0a381dd
BF		 2727static __be32
2728nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 2729{
bc749ca4 2730 __be32 *p;
e2f282b9 2731
d0a381dd
BF		 2732 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2733 if (!p)
2734 return nfserr_resource;
c373b0a4 2735 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 2736 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
2737 sizeof(stateid_opaque_t));
d0a381dd 2738 return 0;
e2f282b9
BH		 2739}
2740
695e12f8 2741static __be32
b37ad28b 2742nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2743{
d0a381dd 2744 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2745 __be32 *p;
1da177e4
LT		 2746
2747 if (!nfserr) {
d0a381dd
BF		 2748 p = xdr_reserve_space(xdr, 8);
2749 if (!p)
2750 return nfserr_resource;
c373b0a4
BF		 2751 *p++ = cpu_to_be32(access->ac_supported);
2752 *p++ = cpu_to_be32(access->ac_resp_access);
1da177e4 2753 }
695e12f8 2754 return nfserr;
1da177e4
LT		 2755}
2756
1d1bc8f2
BF		 2757static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2758{
d0a381dd 2759 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 2760 __be32 *p;
2761
2762 if (!nfserr) {
d0a381dd
BF		 2763 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2764 if (!p)
2765 return nfserr_resource;
0c0c267b
BF		 2766 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
2767 NFS4_MAX_SESSIONID_LEN);
c373b0a4 2768 *p++ = cpu_to_be32(bcts->dir);
6e67b5d1 2769 /* Sorry, we do not yet support RDMA over 4.1: */
c373b0a4 2770 *p++ = cpu_to_be32(0);
1d1bc8f2
BF		 2771 }
2772 return nfserr;
2773}
2774
695e12f8 2775static __be32
b37ad28b 2776nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 2777{
d0a381dd
BF		 2778 struct xdr_stream *xdr = &resp->xdr;
2779
e2f282b9 2780 if (!nfserr)
d0a381dd 2781 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
e2f282b9 2782
695e12f8 2783 return nfserr;
1da177e4
LT		 2784}
2785
2786
695e12f8 2787static __be32
b37ad28b 2788nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2789{
d0a381dd 2790 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2791 __be32 *p;
1da177e4
LT		 2792
2793 if (!nfserr) {
d0a381dd
BF		 2794 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
2795 if (!p)
2796 return nfserr_resource;
0c0c267b
BF		 2797 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
2798 NFS4_VERIFIER_SIZE);
1da177e4 2799 }
695e12f8 2800 return nfserr;
1da177e4
LT		 2801}
2802
695e12f8 2803static __be32
b37ad28b 2804nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2805{
d0a381dd 2806 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2807 __be32 *p;
1da177e4
LT		 2808
2809 if (!nfserr) {
d0a381dd
BF		 2810 p = xdr_reserve_space(xdr, 32);
2811 if (!p)
2812 return nfserr_resource;
d05d5744 2813 p = encode_cinfo(p, &create->cr_cinfo);
c373b0a4
BF		 2814 *p++ = cpu_to_be32(2);
2815 *p++ = cpu_to_be32(create->cr_bmval[0]);
2816 *p++ = cpu_to_be32(create->cr_bmval[1]);
1da177e4 2817 }
695e12f8 2818 return nfserr;
1da177e4
LT		 2819}
2820
b37ad28b
AV		 2821static __be32
2822nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2823{
2824 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 2825 struct xdr_stream *xdr = &resp->xdr;
1da177e4
LT		 2826
2827 if (nfserr)
2828 return nfserr;
2829
d5184658
BF		 2830 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2831 getattr->ga_bmval,
406a7ea9 2832 resp->rqstp, 0);
1da177e4
LT		 2833 return nfserr;
2834}
2835
695e12f8
BH		 2836static __be32
2837nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2838{
d0a381dd 2839 struct xdr_stream *xdr = &resp->xdr;
695e12f8 2840 struct svc_fh *fhp = *fhpp;
1da177e4 2841 unsigned int len;
bc749ca4 2842 __be32 *p;
1da177e4
LT		 2843
2844 if (!nfserr) {
2845 len = fhp->fh_handle.fh_size;
d0a381dd
BF		 2846 p = xdr_reserve_space(xdr, len + 4);
2847 if (!p)
2848 return nfserr_resource;
0c0c267b 2849 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
1da177e4 2850 }
695e12f8 2851 return nfserr;
1da177e4
LT		 2852}
2853
2854/*
2855* Including all fields other than the name, a LOCK4denied structure requires
2856* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2857*/
d0a381dd
BF		 2858static __be32
2859nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 2860{
7c13f344 2861 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2862 __be32 *p;
1da177e4 2863
8c7424cf 2864again:
d0a381dd 2865 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 2866 if (!p) {
2867 /*
2868 * Don't fail to return the result just because we can't
2869 * return the conflicting open:
2870 */
2871 if (conf->len) {
2872 conf->len = 0;
2873 conf->data = NULL;
2874 goto again;
2875 }
d0a381dd 2876 return nfserr_resource;
8c7424cf 2877 }
b64c7f3b
BF		 2878 p = xdr_encode_hyper(p, ld->ld_start);
2879 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 2880 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 2881 if (conf->len) {
0c0c267b
BF		 2882 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
2883 p = xdr_encode_opaque(p, conf->data, conf->len);
1da177e4 2884 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 2885 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 2886 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 2887 }
d0a381dd 2888 return nfserr_denied;
1da177e4
LT		 2889}
2890
695e12f8 2891static __be32
b37ad28b 2892nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2893{
d0a381dd
BF		 2894 struct xdr_stream *xdr = &resp->xdr;
2895
e2f282b9 2896 if (!nfserr)
d0a381dd 2897 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 2898 else if (nfserr == nfserr_denied)
d0a381dd 2899 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
8c7424cf 2900 kfree(lock->lk_denied.ld_owner.data);
695e12f8 2901 return nfserr;
1da177e4
LT		 2902}
2903
695e12f8 2904static __be32
b37ad28b 2905nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 2906{
d0a381dd
BF		 2907 struct xdr_stream *xdr = &resp->xdr;
2908
1da177e4 2909 if (nfserr == nfserr_denied)
d0a381dd 2910 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 2911 return nfserr;
1da177e4
LT		 2912}
2913
695e12f8 2914static __be32
b37ad28b 2915nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 2916{
d0a381dd
BF		 2917 struct xdr_stream *xdr = &resp->xdr;
2918
e2f282b9 2919 if (!nfserr)
d0a381dd 2920 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
e2f282b9 2921
695e12f8 2922 return nfserr;
1da177e4
LT		 2923}
2924
2925
695e12f8 2926static __be32
b37ad28b 2927nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2928{
d0a381dd 2929 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2930 __be32 *p;
1da177e4
LT		 2931
2932 if (!nfserr) {
d0a381dd
BF		 2933 p = xdr_reserve_space(xdr, 20);
2934 if (!p)
2935 return nfserr_resource;
d05d5744 2936 p = encode_cinfo(p, &link->li_cinfo);
1da177e4 2937 }
695e12f8 2938 return nfserr;
1da177e4
LT		 2939}
2940
2941
695e12f8 2942static __be32
b37ad28b 2943nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2944{
d0a381dd 2945 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2946 __be32 *p;
1da177e4
LT		 2947
2948 if (nfserr)
2949 goto out;
2950
d0a381dd
BF		 2951 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
2952 if (nfserr)
2953 goto out;
2954 p = xdr_reserve_space(xdr, 40);
2955 if (!p)
2956 return nfserr_resource;
d05d5744 2957 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4
BF		 2958 *p++ = cpu_to_be32(open->op_rflags);
2959 *p++ = cpu_to_be32(2);
2960 *p++ = cpu_to_be32(open->op_bmval[0]);
2961 *p++ = cpu_to_be32(open->op_bmval[1]);
2962 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 2963
2964 switch (open->op_delegate_type) {
2965 case NFS4_OPEN_DELEGATE_NONE:
2966 break;
2967 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 2968 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2969 if (nfserr)
2970 return nfserr;
2971 p = xdr_reserve_space(xdr, 20);
2972 if (!p)
2973 return nfserr_resource;
c373b0a4 2974 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 2975
2976 /*
2977 * TODO: ACE's in delegations
2978 */
c373b0a4
BF		 2979 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2980 *p++ = cpu_to_be32(0);
2981 *p++ = cpu_to_be32(0);
2982 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 2983 break;
2984 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 2985 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2986 if (nfserr)
2987 return nfserr;
2988 p = xdr_reserve_space(xdr, 32);
2989 if (!p)
2990 return nfserr_resource;
c373b0a4 2991 *p++ = cpu_to_be32(0);
1da177e4
LT		 2992
2993 /*
2994 * TODO: space_limit's in delegations
2995 */
c373b0a4
BF		 2996 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
2997 *p++ = cpu_to_be32(~(u32)0);
2998 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 2999
3000 /*
3001 * TODO: ACE's in delegations
3002 */
c373b0a4
BF		 3003 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3004 *p++ = cpu_to_be32(0);
3005 *p++ = cpu_to_be32(0);
3006 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3007 break;
d24433cd
BH		 3008 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3009 switch (open->op_why_no_deleg) {
3010 case WND4_CONTENTION:
3011 case WND4_RESOURCE:
d0a381dd
BF		 3012 p = xdr_reserve_space(xdr, 8);
3013 if (!p)
3014 return nfserr_resource;
c373b0a4
BF		 3015 *p++ = cpu_to_be32(open->op_why_no_deleg);
3016 /* deleg signaling not supported yet: */
3017 *p++ = cpu_to_be32(0);
d24433cd
BH		 3018 break;
3019 default:
d0a381dd
BF		 3020 p = xdr_reserve_space(xdr, 4);
3021 if (!p)
3022 return nfserr_resource;
c373b0a4 3023 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3024 }
d24433cd 3025 break;
1da177e4
LT		 3026 default:
3027 BUG();
3028 }
3029 /* XXX save filehandle here */
3030out:
695e12f8 3031 return nfserr;
1da177e4
LT		 3032}
3033
695e12f8 3034static __be32
b37ad28b 3035nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3036{
d0a381dd
BF		 3037 struct xdr_stream *xdr = &resp->xdr;
3038
e2f282b9 3039 if (!nfserr)
d0a381dd 3040 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4 3041
695e12f8 3042 return nfserr;
1da177e4
LT		 3043}
3044
695e12f8 3045static __be32
b37ad28b 3046nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3047{
d0a381dd
BF		 3048 struct xdr_stream *xdr = &resp->xdr;
3049
e2f282b9 3050 if (!nfserr)
d0a381dd 3051 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4 3052
695e12f8 3053 return nfserr;
1da177e4
LT		 3054}
3055
dc97618d
BF		 3056static __be32 nfsd4_encode_splice_read(
3057 struct nfsd4_compoundres *resp,
3058 struct nfsd4_read *read,
3059 struct file *file, unsigned long maxcount)
1da177e4 3060{
ddd1ea56 3061 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3062 struct xdr_buf *buf = xdr->buf;
dc97618d 3063 u32 eof;
30596768 3064 int space_left;
dc97618d 3065 __be32 nfserr;
fec25fa4 3066 __be32 *p = xdr->p - 2;
1da177e4 3067
dc97618d
BF		 3068 /*
3069 * Don't inline pages unless we know there's room for eof,
3070 * count, and possible padding:
3071 */
3072 if (xdr->end - xdr->p < 3)
d0a381dd 3073 return nfserr_resource;
dc97618d
BF		 3074
3075 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3076 read->rd_offset, &maxcount);
3077 if (nfserr) {
3078 /*
3079 * nfsd_splice_actor may have already messed with the
3080 * page length; reset it so as not to confuse
3081 * xdr_truncate_encode:
3082 */
34a78b48 3083 buf->page_len = 0;
dc97618d 3084 return nfserr;
b0e35fda 3085 }
1da177e4 3086
dc97618d
BF		 3087 eof = (read->rd_offset + maxcount >=
3088 read->rd_fhp->fh_dentry->d_inode->i_size);
4e21ac4b 3089
fec25fa4
BF		 3090 *(p++) = htonl(eof);
3091 *(p++) = htonl(maxcount);
dc97618d 3092
34a78b48
BF		 3093 buf->page_len = maxcount;
3094 buf->len += maxcount;
dc97618d 3095 xdr->page_ptr += (maxcount + PAGE_SIZE - 1) / PAGE_SIZE;
dc97618d
BF		 3096
3097 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3098 buf->tail[0].iov_base = xdr->p;
3099 buf->tail[0].iov_len = 0;
fec25fa4 3100 xdr->iov = buf->tail;
dc97618d 3101 if (maxcount&3) {
fec25fa4
BF		 3102 int pad = 4 - (maxcount&3);
3103
3104 *(xdr->p++) = 0;
3105
34a78b48 3106 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3107 buf->tail[0].iov_len = pad;
3108 buf->len += pad;
b0e35fda 3109 }
2825a7f9 3110
dc97618d 3111 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3112 buf->buflen - buf->len);
3113 buf->buflen = buf->len + space_left;
dc97618d
BF		 3114 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3115
3116 return 0;
3117}
3118
3119static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3120 struct nfsd4_read *read,
3121 struct file *file, unsigned long maxcount)
3122{
3123 struct xdr_stream *xdr = &resp->xdr;
3124 u32 eof;
3125 int v;
dc97618d 3126 int starting_len = xdr->buf->len - 8;
dc97618d 3127 long len;
b0420980 3128 int thislen;
dc97618d
BF		 3129 __be32 nfserr;
3130 __be32 tmp;
3131 __be32 *p;
b0420980
BF		 3132 u32 zzz = 0;
3133 int pad;
1da177e4
LT		 3134
3135 len = maxcount;
3136 v = 0;
6ff9897d 3137
b0420980
BF		 3138 thislen = (void *)xdr->end - (void *)xdr->p;
3139 if (len < thislen)
3140 thislen = len;
3141 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3142 WARN_ON_ONCE(!p);
3143 resp->rqstp->rq_vec[v].iov_base = p;
3144 resp->rqstp->rq_vec[v].iov_len = thislen;
3145 v++;
3146 len -= thislen;
3147
3148 while (len) {
6ff9897d 3149 thislen = min_t(long, len, PAGE_SIZE);
b0420980
BF		 3150 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3151 WARN_ON_ONCE(!p);
3152 resp->rqstp->rq_vec[v].iov_base = p;
6ff9897d 3153 resp->rqstp->rq_vec[v].iov_len = thislen;
1da177e4 3154 v++;
6ff9897d 3155 len -= thislen;
1da177e4
LT		 3156 }
3157 read->rd_vlen = v;
3158
dc97618d
BF		 3159 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3160 read->rd_vlen, &maxcount);
3161 if (nfserr)
1da177e4 3162 return nfserr;
b0420980 3163 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
dc97618d 3164
44524359
N		 3165 eof = (read->rd_offset + maxcount >=
3166 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4 3167
dc97618d
BF		 3168 tmp = htonl(eof);
3169 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3170 tmp = htonl(maxcount);
3171 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3172
b0420980
BF		 3173 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3174 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3175 &zzz, pad);
1da177e4 3176 return 0;
dc97618d
BF		 3177
3178}
3179
3180static __be32
3181nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3182 struct nfsd4_read *read)
3183{
3184 unsigned long maxcount;
3185 struct xdr_stream *xdr = &resp->xdr;
3186 struct file *file = read->rd_filp;
3187 int starting_len = xdr->buf->len;
3188 struct raparms *ra;
3189 __be32 *p;
3190 __be32 err;
3191
3192 if (nfserr)
3193 return nfserr;
3194
3195 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3196 if (!p) {
3197 WARN_ON_ONCE(resp->rqstp->rq_splice_ok);
3198 return nfserr_resource;
3199 }
b0420980
BF		 3200 if (resp->xdr.buf->page_len && resp->rqstp->rq_splice_ok) {
3201 WARN_ON_ONCE(1);
dc97618d
BF		 3202 return nfserr_resource;
3203 }
dc97618d
BF		 3204 xdr_commit_encode(xdr);
3205
3206 maxcount = svc_max_payload(resp->rqstp);
b0420980
BF		 3207 if (maxcount > xdr->buf->buflen - xdr->buf->len)
3208 maxcount = xdr->buf->buflen - xdr->buf->len;
dc97618d
BF		 3209 if (maxcount > read->rd_length)
3210 maxcount = read->rd_length;
3211
3212 if (!read->rd_filp) {
3213 err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
3214 &file, &ra);
3215 if (err)
3216 goto err_truncate;
3217 }
3218
3219 if (file->f_op->splice_read && resp->rqstp->rq_splice_ok)
3220 err = nfsd4_encode_splice_read(resp, read, file, maxcount);
3221 else
3222 err = nfsd4_encode_readv(resp, read, file, maxcount);
3223
3224 if (!read->rd_filp)
3225 nfsd_put_tmp_read_open(file, ra);
3226
3227err_truncate:
3228 if (err)
3229 xdr_truncate_encode(xdr, starting_len);
3230 return err;
1da177e4
LT		 3231}
3232
b37ad28b
AV		 3233static __be32
3234nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3235{
3236 int maxcount;
476a7b1f
BF		 3237 __be32 wire_count;
3238 int zero = 0;
ddd1ea56 3239 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3240 int length_offset = xdr->buf->len;
bc749ca4 3241 __be32 *p;
1da177e4
LT		 3242
3243 if (nfserr)
3244 return nfserr;
2825a7f9
BF		 3245
3246 p = xdr_reserve_space(xdr, 4);
3247 if (!p)
3248 return nfserr_resource;
1da177e4 3249 maxcount = PAGE_SIZE;
d0a381dd 3250
476a7b1f
BF		 3251 p = xdr_reserve_space(xdr, maxcount);
3252 if (!p)
4e21ac4b 3253 return nfserr_resource;
1da177e4
LT		 3254 /*
3255 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3256 * if they would overflow the buffer. Is this kosher in NFSv4? If
3257 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3258 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3259 */
476a7b1f
BF		 3260 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3261 (char *)p, &maxcount);
1da177e4 3262 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3263 nfserr = nfserr_inval;
3264 if (nfserr) {
1fcea5b2 3265 xdr_truncate_encode(xdr, length_offset);
1da177e4 3266 return nfserr;
d3f627c8 3267 }
1da177e4 3268
476a7b1f
BF		 3269 wire_count = htonl(maxcount);
3270 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3271 xdr_truncate_encode(xdr, length_offset + 4 + maxcount);
3272 if (maxcount & 3)
3273 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3274 &zero, 4 - (maxcount&3));
1da177e4
LT		 3275 return 0;
3276}
3277
b37ad28b
AV		 3278static __be32
3279nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3280{
3281 int maxcount;
561f0ed4 3282 int bytes_left;
1da177e4 3283 loff_t offset;
561f0ed4 3284 __be64 wire_offset;
ddd1ea56 3285 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3286 int starting_len = xdr->buf->len;
bc749ca4 3287 __be32 *p;
1da177e4
LT		 3288
3289 if (nfserr)
3290 return nfserr;
1da177e4 3291
d0a381dd
BF		 3292 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3293 if (!p)
3294 return nfserr_resource;
1da177e4
LT		 3295
3296 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 3297 *p++ = cpu_to_be32(0);
3298 *p++ = cpu_to_be32(0);
4aea24b2
BF		 3299 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3300 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3301
3302 /*
561f0ed4
BF		 3303 * Number of bytes left for directory entries allowing for the
3304 * final 8 bytes of the readdir and a following failed op:
3305 */
3306 bytes_left = xdr->buf->buflen - xdr->buf->len
3307 - COMPOUND_ERR_SLACK_SPACE - 8;
3308 if (bytes_left < 0) {
3309 nfserr = nfserr_resource;
3310 goto err_no_verf;
3311 }
3312 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3313 /*
3314 * Note the rfc defines rd_maxcount as the size of the
3315 * READDIR4resok structure, which includes the verifier above
3316 * and the 8 bytes encoded at the end of this function:
1da177e4 3317 */
561f0ed4
BF		 3318 if (maxcount < 16) {
3319 nfserr = nfserr_toosmall;
1da177e4
LT		 3320 goto err_no_verf;
3321 }
561f0ed4 3322 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3323
561f0ed4
BF		 3324 readdir->xdr = xdr;
3325 readdir->rd_maxcount = maxcount;
1da177e4 3326 readdir->common.err = 0;
561f0ed4 3327 readdir->cookie_offset = 0;
1da177e4
LT		 3328
3329 offset = readdir->rd_cookie;
3330 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3331 &offset,
3332 &readdir->common, nfsd4_encode_dirent);
3333 if (nfserr == nfs_ok &&
3334 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3335 xdr->buf->len == starting_len + 8) {
3336 /* nothing encoded; which limit did we hit?: */
3337 if (maxcount - 16 < bytes_left)
3338 /* It was the fault of rd_maxcount: */
3339 nfserr = nfserr_toosmall;
3340 else
3341 /* We ran out of buffer space: */
3342 nfserr = nfserr_resource;
3343 }
1da177e4
LT		 3344 if (nfserr)
3345 goto err_no_verf;
3346
561f0ed4
BF		 3347 if (readdir->cookie_offset) {
3348 wire_offset = cpu_to_be64(offset);
3349 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3350 &wire_offset, 8);
3351 }
1da177e4 3352
561f0ed4
BF		 3353 p = xdr_reserve_space(xdr, 8);
3354 if (!p) {
3355 WARN_ON_ONCE(1);
3356 goto err_no_verf;
3357 }
1da177e4
LT		 3358 *p++ = 0; /* no more entries */
3359 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3360
3361 return 0;
3362err_no_verf:
1fcea5b2 3363 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3364 return nfserr;
3365}
3366
695e12f8 3367static __be32
b37ad28b 3368nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3369{
d0a381dd 3370 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3371 __be32 *p;
1da177e4
LT		 3372
3373 if (!nfserr) {
d0a381dd
BF		 3374 p = xdr_reserve_space(xdr, 20);
3375 if (!p)
3376 return nfserr_resource;
d05d5744 3377 p = encode_cinfo(p, &remove->rm_cinfo);
1da177e4 3378 }
695e12f8 3379 return nfserr;
1da177e4
LT		 3380}
3381
695e12f8 3382static __be32
b37ad28b 3383nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3384{
d0a381dd 3385 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3386 __be32 *p;
1da177e4
LT		 3387
3388 if (!nfserr) {
d0a381dd
BF		 3389 p = xdr_reserve_space(xdr, 40);
3390 if (!p)
3391 return nfserr_resource;
d05d5744
BF		 3392 p = encode_cinfo(p, &rename->rn_sinfo);
3393 p = encode_cinfo(p, &rename->rn_tinfo);
1da177e4 3394 }
695e12f8 3395 return nfserr;
1da177e4
LT		 3396}
3397
695e12f8 3398static __be32
d0a381dd 3399nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
a77c806f 3400 __be32 nfserr, struct svc_export *exp)
dcb488a3 3401{
676e4ebd 3402 u32 i, nflavs, supported;
4796f457
BF		 3403 struct exp_flavor_info *flavs;
3404 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3405 __be32 *p, *flavorsp;
3406 static bool report = true;
dcb488a3
AA		 3407
3408 if (nfserr)
3409 goto out;
d0a381dd 3410 nfserr = nfserr_resource;
4796f457
BF		 3411 if (exp->ex_nflavors) {
3412 flavs = exp->ex_flavors;
3413 nflavs = exp->ex_nflavors;
3414 } else { /* Handling of some defaults in absence of real secinfo: */
3415 flavs = def_flavs;
3416 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3417 nflavs = 2;
3418 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3419 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3420 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3421 nflavs = 1;
3422 flavs[0].pseudoflavor
3423 = svcauth_gss_flavor(exp->ex_client);
3424 } else {
3425 nflavs = 1;
3426 flavs[0].pseudoflavor
3427 = exp->ex_client->flavour->flavour;
3428 }
3429 }
3430
676e4ebd 3431 supported = 0;
d0a381dd
BF		 3432 p = xdr_reserve_space(xdr, 4);
3433 if (!p)
3434 goto out;
676e4ebd 3435 flavorsp = p++; /* to be backfilled later */
676e4ebd 3436
4796f457 3437 for (i = 0; i < nflavs; i++) {
676e4ebd 3438 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3439 struct rpcsec_gss_info info;
dcb488a3 3440
676e4ebd
CL		 3441 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3442 supported++;
d0a381dd
BF		 3443 p = xdr_reserve_space(xdr, 4 + 4 +
3444 XDR_LEN(info.oid.len) + 4 + 4);
3445 if (!p)
3446 goto out;
c373b0a4 3447 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 3448 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 3449 *p++ = cpu_to_be32(info.qop);
3450 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 3451 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3452 supported++;
d0a381dd
BF		 3453 p = xdr_reserve_space(xdr, 4);
3454 if (!p)
3455 goto out;
c373b0a4 3456 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 3457 } else {
3458 if (report)
3459 pr_warn("NFS: SECINFO: security flavor %u "
3460 "is not supported\n", pf);
dcb488a3
AA		 3461 }
3462 }
a77c806f 3463
676e4ebd
CL		 3464 if (nflavs != supported)
3465 report = false;
3466 *flavorsp = htonl(supported);
d0a381dd 3467 nfserr = 0;
dcb488a3
AA		 3468out:
3469 if (exp)
3470 exp_put(exp);
695e12f8 3471 return nfserr;
dcb488a3
AA		 3472}
3473
22b6dee8
MJ		 3474static __be32
3475nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3476 struct nfsd4_secinfo *secinfo)
3477{
d0a381dd
BF		 3478 struct xdr_stream *xdr = &resp->xdr;
3479
3480 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
22b6dee8
MJ		 3481}
3482
3483static __be32
3484nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3485 struct nfsd4_secinfo_no_name *secinfo)
3486{
d0a381dd
BF		 3487 struct xdr_stream *xdr = &resp->xdr;
3488
3489 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
22b6dee8
MJ		 3490}
3491
1da177e4
LT		 3492/*
3493 * The SETATTR encode routine is special -- it always encodes a bitmap,
3494 * regardless of the error status.
3495 */
695e12f8 3496static __be32
b37ad28b 3497nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3498{
d0a381dd 3499 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3500 __be32 *p;
1da177e4 3501
d0a381dd
BF		 3502 p = xdr_reserve_space(xdr, 16);
3503 if (!p)
3504 return nfserr_resource;
1da177e4 3505 if (nfserr) {
c373b0a4
BF		 3506 *p++ = cpu_to_be32(3);
3507 *p++ = cpu_to_be32(0);
3508 *p++ = cpu_to_be32(0);
3509 *p++ = cpu_to_be32(0);
1da177e4
LT		 3510 }
3511 else {
c373b0a4
BF		 3512 *p++ = cpu_to_be32(3);
3513 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3514 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3515 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 3516 }
695e12f8 3517 return nfserr;
1da177e4
LT		 3518}
3519
695e12f8 3520static __be32
b37ad28b 3521nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3522{
d0a381dd 3523 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3524 __be32 *p;
1da177e4
LT		 3525
3526 if (!nfserr) {
d0a381dd
BF		 3527 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3528 if (!p)
3529 return nfserr_resource;
0c0c267b
BF		 3530 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3531 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3532 NFS4_VERIFIER_SIZE);
1da177e4
LT		 3533 }
3534 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3535 p = xdr_reserve_space(xdr, 8);
3536 if (!p)
3537 return nfserr_resource;
c373b0a4
BF		 3538 *p++ = cpu_to_be32(0);
3539 *p++ = cpu_to_be32(0);
1da177e4 3540 }
695e12f8 3541 return nfserr;
1da177e4
LT		 3542}
3543
695e12f8 3544static __be32
b37ad28b 3545nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3546{
d0a381dd 3547 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3548 __be32 *p;
1da177e4
LT		 3549
3550 if (!nfserr) {
d0a381dd
BF		 3551 p = xdr_reserve_space(xdr, 16);
3552 if (!p)
3553 return nfserr_resource;
c373b0a4
BF		 3554 *p++ = cpu_to_be32(write->wr_bytes_written);
3555 *p++ = cpu_to_be32(write->wr_how_written);
0c0c267b
BF		 3556 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3557 NFS4_VERIFIER_SIZE);
1da177e4 3558 }
695e12f8 3559 return nfserr;
1da177e4
LT		 3560}
3561
57266a6e
BF		 3562static const u32 nfs4_minimal_spo_must_enforce[2] = {
3563 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3564 1 << (OP_EXCHANGE_ID - 32) |
3565 1 << (OP_CREATE_SESSION - 32) |
3566 1 << (OP_DESTROY_SESSION - 32) |
3567 1 << (OP_DESTROY_CLIENTID - 32)
3568};
3569
2db134eb 3570static __be32
57b7b43b 3571nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3572 struct nfsd4_exchange_id *exid)
3573{
d0a381dd 3574 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3575 __be32 *p;
0733d213
AA		 3576 char *major_id;
3577 char *server_scope;
3578 int major_id_sz;
3579 int server_scope_sz;
3580 uint64_t minor_id = 0;
3581
3582 if (nfserr)
3583 return nfserr;
3584
3585 major_id = utsname()->nodename;
3586 major_id_sz = strlen(major_id);
3587 server_scope = utsname()->nodename;
3588 server_scope_sz = strlen(server_scope);
3589
d0a381dd 3590 p = xdr_reserve_space(xdr,
0733d213
AA		 3591 8 /* eir_clientid */ +
3592 4 /* eir_sequenceid */ +
3593 4 /* eir_flags */ +
a8bb84bc 3594 4 /* spr_how */);
d0a381dd
BF		 3595 if (!p)
3596 return nfserr_resource;
0733d213 3597
0c0c267b 3598 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 3599 *p++ = cpu_to_be32(exid->seqid);
3600 *p++ = cpu_to_be32(exid->flags);
0733d213 3601
c373b0a4 3602 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 3603
57266a6e
BF		 3604 switch (exid->spa_how) {
3605 case SP4_NONE:
3606 break;
3607 case SP4_MACH_CRED:
a8bb84bc 3608 /* spo_must_enforce, spo_must_allow */
d0a381dd
BF		 3609 p = xdr_reserve_space(xdr, 16);
3610 if (!p)
3611 return nfserr_resource;
a8bb84bc 3612
57266a6e 3613 /* spo_must_enforce bitmap: */
c373b0a4
BF		 3614 *p++ = cpu_to_be32(2);
3615 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3616 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
57266a6e 3617 /* empty spo_must_allow bitmap: */
c373b0a4 3618 *p++ = cpu_to_be32(0);
a8bb84bc 3619
57266a6e
BF		 3620 break;
3621 default:
3622 WARN_ON_ONCE(1);
3623 }
0733d213 3624
d0a381dd 3625 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3626 8 /* so_minor_id */ +
3627 4 /* so_major_id.len */ +
3628 (XDR_QUADLEN(major_id_sz) * 4) +
3629 4 /* eir_server_scope.len */ +
3630 (XDR_QUADLEN(server_scope_sz) * 4) +
3631 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3632 if (!p)
3633 return nfserr_resource;
a8bb84bc 3634
0733d213 3635 /* The server_owner struct */
b64c7f3b 3636 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 3637 /* major id */
0c0c267b 3638 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 3639
3640 /* Server scope */
0c0c267b 3641 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 3642
3643 /* Implementation id */
c373b0a4 3644 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 3645 return 0;
2db134eb
AA		 3646}
3647
3648static __be32
57b7b43b 3649nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3650 struct nfsd4_create_session *sess)
3651{
d0a381dd 3652 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3653 __be32 *p;
ec6b5d7b
AA		 3654
3655 if (nfserr)
3656 return nfserr;
3657
d0a381dd
BF		 3658 p = xdr_reserve_space(xdr, 24);
3659 if (!p)
3660 return nfserr_resource;
0c0c267b
BF		 3661 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3662 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3663 *p++ = cpu_to_be32(sess->seqid);
3664 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 3665
d0a381dd
BF		 3666 p = xdr_reserve_space(xdr, 28);
3667 if (!p)
3668 return nfserr_resource;
c373b0a4
BF		 3669 *p++ = cpu_to_be32(0); /* headerpadsz */
3670 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3671 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3672 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3673 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3674 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3675 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3676
3677 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 3678 p = xdr_reserve_space(xdr, 4);
3679 if (!p)
3680 return nfserr_resource;
c373b0a4 3681 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 3682 }
3683
d0a381dd
BF		 3684 p = xdr_reserve_space(xdr, 28);
3685 if (!p)
3686 return nfserr_resource;
c373b0a4
BF		 3687 *p++ = cpu_to_be32(0); /* headerpadsz */
3688 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3689 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3690 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3691 *p++ = cpu_to_be32(sess->back_channel.maxops);
3692 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3693 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3694
3695 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 3696 p = xdr_reserve_space(xdr, 4);
3697 if (!p)
3698 return nfserr_resource;
c373b0a4 3699 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 3700 }
3701 return 0;
2db134eb
AA		 3702}
3703
c47d832b 3704static __be32
57b7b43b 3705nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3706 struct nfsd4_sequence *seq)
3707{
d0a381dd 3708 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3709 __be32 *p;
b85d4c01
BH		 3710
3711 if (nfserr)
3712 return nfserr;
3713
d0a381dd
BF		 3714 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3715 if (!p)
3716 return nfserr_resource;
0c0c267b
BF		 3717 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
3718 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3719 *p++ = cpu_to_be32(seq->seqid);
3720 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 3721 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 3722 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
3723 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
3724 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 3725
f5236013 3726 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 3727 return 0;
2db134eb
AA		 3728}
3729
2355c596 3730static __be32
57b7b43b 3731nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3732 struct nfsd4_test_stateid *test_stateid)
3733{
d0a381dd 3734 struct xdr_stream *xdr = &resp->xdr;
03cfb420 3735 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3736 __be32 *p;
17456804 3737
a11fcce1
BF		 3738 if (nfserr)
3739 return nfserr;
3740
d0a381dd
BF		 3741 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3742 if (!p)
3743 return nfserr_resource;
17456804 3744 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3745
03cfb420 3746 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3747 *p++ = stateid->ts_id_status;
17456804 3748 }
17456804
BS		 3749
3750 return nfserr;
3751}
3752
695e12f8
BH		 3753static __be32
3754nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3755{
3756 return nfserr;
3757}
3758
3759typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3760
2db134eb
AA		 3761/*
3762 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3763 * since we don't need to filter out obsolete ops as this is
3764 * done in the decoding phase.
3765 */
695e12f8 3766static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3767 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3768 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3769 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3770 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3771 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3772 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3773 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3774 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3775 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3776 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3777 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3778 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3779 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3780 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3781 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3782 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3783 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3784 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3785 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3786 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3787 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3788 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3789 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3790 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3791 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3792 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3793 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3794 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3795 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3796 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3797 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3798 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3799 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3800 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3801 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3802 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3803 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3804
3805 /* NFSv4.1 operations */
3806 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3807 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3808 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3809 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 3810 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3811 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3812 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3813 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3814 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3815 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3816 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3817 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3818 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3819 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3820 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3821 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3822 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3823 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3824 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3825};
3826
496c262c 3827/*
a8095f7e
BF		 3828 * Calculate whether we still have space to encode repsize bytes.
3829 * There are two considerations:
3830 * - For NFS versions >=4.1, the size of the reply must stay within
3831 * session limits
3832 * - For all NFS versions, we must stay within limited preallocated
3833 * buffer space.
496c262c 3834 *
a8095f7e
BF		 3835 * This is called before the operation is processed, so can only provide
3836 * an upper estimate. For some nonidempotent operations (such as
3837 * getattr), it's not necessarily a problem if that estimate is wrong,
3838 * as we can fail it after processing without significant side effects.
496c262c 3839 */
a8095f7e 3840__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 3841{
67492c99 3842 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 3843 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 3844
47ee5298
BF		 3845 if (buf->len + respsize <= buf->buflen)
3846 return nfs_ok;
3847 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 3848 return nfserr_resource;
47ee5298
BF		 3849 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
3850 WARN_ON_ONCE(1);
3851 return nfserr_rep_too_big_to_cache;
ea8d7720 3852 }
47ee5298 3853 return nfserr_rep_too_big;
496c262c
AA		 3854}
3855
1da177e4
LT		 3856void
3857nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3858{
082d4bd7 3859 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 3860 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 3861 struct svc_rqst *rqstp = resp->rqstp;
082d4bd7 3862 int post_err_offset;
07d1f802 3863 nfsd4_enc encoder;
bc749ca4 3864 __be32 *p;
1da177e4 3865
d0a381dd
BF		 3866 p = xdr_reserve_space(xdr, 8);
3867 if (!p) {
3868 WARN_ON_ONCE(1);
3869 return;
3870 }
c373b0a4 3871 *p++ = cpu_to_be32(op->opnum);
082d4bd7 3872 post_err_offset = xdr->buf->len;
1da177e4 3873
695e12f8
BH		 3874 if (op->opnum == OP_ILLEGAL)
3875 goto status;
3876 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3877 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 3878 encoder = nfsd4_enc_ops[op->opnum];
3879 op->status = encoder(resp, op->status, &op->u);
2825a7f9
BF		 3880 xdr_commit_encode(xdr);
3881
067e1ace 3882 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 3883 if (!op->status) {
3884 int space_needed = 0;
3885 if (!nfsd4_last_compound_op(rqstp))
3886 space_needed = COMPOUND_ERR_SLACK_SPACE;
3887 op->status = nfsd4_check_resp_size(resp, space_needed);
3888 }
c8f13d97
BF		 3889 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
3890 struct nfsd4_slot *slot = resp->cstate.slot;
3891
3892 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
3893 op->status = nfserr_rep_too_big_to_cache;
3894 else
3895 op->status = nfserr_rep_too_big;
3896 }
07d1f802
BF		 3897 if (op->status == nfserr_resource ||
3898 op->status == nfserr_rep_too_big ||
3899 op->status == nfserr_rep_too_big_to_cache) {
3900 /*
3901 * The operation may have already been encoded or
3902 * partially encoded. No op returns anything additional
3903 * in the case of one of these three errors, so we can
3904 * just truncate back to after the status. But it's a
3905 * bug if we had to do this on a non-idempotent op:
3906 */
3907 warn_on_nonidempotent_op(op);
082d4bd7 3908 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 3909 }
9411b1d4 3910 if (so) {
082d4bd7
BF		 3911 int len = xdr->buf->len - post_err_offset;
3912
9411b1d4 3913 so->so_replay.rp_status = op->status;
082d4bd7
BF		 3914 so->so_replay.rp_buflen = len;
3915 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
3916 so->so_replay.rp_buf, len);
9411b1d4 3917 }
695e12f8 3918status:
082d4bd7
BF		 3919 /* Note that op->status is already in network byte order: */
3920 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 3921}
3922
3923/*
3924 * Encode the reply stored in the stateowner reply cache
3925 *
3926 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3927 * previously sent already encoded operation.
3928 *
3929 * called with nfs4_lock_state() held
3930 */
3931void
d0a381dd 3932nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 3933{
bc749ca4 3934 __be32 *p;
1da177e4
LT		 3935 struct nfs4_replay *rp = op->replay;
3936
3937 BUG_ON(!rp);
3938
d0a381dd
BF		 3939 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
3940 if (!p) {
3941 WARN_ON_ONCE(1);
3942 return;
3943 }
c373b0a4 3944 *p++ = cpu_to_be32(op->opnum);
1da177e4 3945 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 3946
0c0c267b 3947 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 3948}
3949
1da177e4 3950int
2ebbc012 3951nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3952{
3953 return xdr_ressize_check(rqstp, p);
3954}
3955
3e98abff 3956int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3957{
3e98abff
BF		 3958 struct svc_rqst *rqstp = rq;
3959 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3960
1da177e4
LT		 3961 if (args->ops != args->iops) {
3962 kfree(args->ops);
3963 args->ops = args->iops;
3964 }
f99d49ad
JJ		 3965 kfree(args->tmpp);
3966 args->tmpp = NULL;
1da177e4
LT		 3967 while (args->to_free) {
3968 struct tmpbuf *tb = args->to_free;
3969 args->to_free = tb->next;
3970 tb->release(tb->buf);
3971 kfree(tb);
3972 }
3e98abff 3973 return 1;
1da177e4
LT		 3974}
3975
3976int
2ebbc012 3977nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3978{
e874f9f8
JL		 3979 if (rqstp->rq_arg.head[0].iov_len % 4) {
3980 /* client is nuts */
3981 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
3982 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
3983 return 0;
3984 }
1da177e4
LT		 3985 args->p = p;
3986 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3987 args->pagelist = rqstp->rq_arg.pages;
3988 args->pagelen = rqstp->rq_arg.page_len;
3989 args->tmpp = NULL;
3990 args->to_free = NULL;
3991 args->ops = args->iops;
3992 args->rqstp = rqstp;
3993
3e98abff 3994 return !nfsd4_decode_compound(args);
1da177e4
LT		 3995}
3996
3997int
2ebbc012 3998nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3999{
4000 /*
4001 * All that remains is to write the tag and operation count...
4002 */
557ce264 4003 struct nfsd4_compound_state *cs = &resp->cstate;
6ac90391
BF		 4004 struct xdr_buf *buf = resp->xdr.buf;
4005
4006 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4007 buf->tail[0].iov_len);
dd97fdde 4008
2825a7f9
BF		 4009 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4010
1da177e4
LT		 4011 p = resp->tagp;
4012 *p++ = htonl(resp->taglen);
4013 memcpy(p, resp->tag, resp->taglen);
4014 p += XDR_QUADLEN(resp->taglen);
4015 *p++ = htonl(resp->opcnt);
4016
26c0c75e 4017 if (nfsd4_has_session(cs)) {
f0f51f5c
BF		 4018 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4019 struct nfs4_client *clp = cs->session->se_client;
26c0c75e
BF		 4020 if (cs->status != nfserr_replay_cache) {
4021 nfsd4_store_cache_entry(resp);
73e79482 4022 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 4023 }
d7682988 4024 /* Renew the clientid on success and on replay */
f0f51f5c 4025 spin_lock(&nn->client_lock);
221a6876 4026 nfsd4_put_session(cs->session);
f0f51f5c
BF		 4027 spin_unlock(&nn->client_lock);
4028 put_client_renew(clp);
da3846a2 4029 }
1da177e4
LT		 4030 return 1;
4031}
4032
4033/*
4034 * Local variables:
4035 * c-basic-offset: 8
4036 * End:
4037 */
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