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Merge branch 'for-6.0/dax' into libnvdimm-fixes
[people/ms/linux.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.
1da177e4
LT		 34 */
35
96bcad50 36#include <linux/file.h>
5a0e3ad6 37#include <linux/slab.h>
1da177e4 38#include <linux/namei.h>
341eb184 39#include <linux/statfs.h>
0733d213 40#include <linux/utsname.h>
17456804 41#include <linux/pagemap.h>
4796f457 42#include <linux/sunrpc/svcauth_gss.h>
84e1b21d 43#include <linux/sunrpc/addr.h>
23e50fe3
FL		 44#include <linux/xattr.h>
45#include <uapi/linux/xattr.h>
9a74af21 46
2ca72e17
BF		 47#include "idmap.h"
48#include "acl.h"
9a74af21 49#include "xdr4.h"
0a3adade 50#include "vfs.h"
17456804 51#include "state.h"
1091006c 52#include "cache.h"
3d733711 53#include "netns.h"
9cf514cc 54#include "pnfs.h"
5c4583b2 55#include "filecache.h"
2ca72e17 56
08281341
CL		 57#include "trace.h"
58
18032ca0
DQ		 59#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
60#include <linux/security.h>
61#endif
62
63
1da177e4
LT		 64#define NFSDDBG_FACILITY NFSDDBG_XDR
65
5cf23dbb 66const u32 nfsd_suppattrs[3][3] = {
916d2d84
BF		 67 {NFSD4_SUPPORTED_ATTRS_WORD0,
68 NFSD4_SUPPORTED_ATTRS_WORD1,
69 NFSD4_SUPPORTED_ATTRS_WORD2},
70
71 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
72 NFSD4_1_SUPPORTED_ATTRS_WORD1,
73 NFSD4_1_SUPPORTED_ATTRS_WORD2},
74
75 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
76 NFSD4_1_SUPPORTED_ATTRS_WORD1,
77 NFSD4_2_SUPPORTED_ATTRS_WORD2},
78};
79
42ca0993
BF		 80/*
81 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
82 * directory in order to indicate to the client that a filesystem boundary is present
83 * We use a fixed fsid for a referral
84 */
85#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
86#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
87
b37ad28b 88static __be32
a36b1725 89check_filename(char *str, int len)
1da177e4
LT		 90{
91 int i;
92
93 if (len == 0)
94 return nfserr_inval;
000dfa18
CL		 95 if (len > NFS4_MAXNAMLEN)
96 return nfserr_nametoolong;
1da177e4 97 if (isdotent(str, len))
a36b1725 98 return nfserr_badname;
1da177e4
LT		 99 for (i = 0; i < len; i++)
100 if (str[i] == '/')
a36b1725 101 return nfserr_badname;
1da177e4
LT		 102 return 0;
103}
104
60adfc50
AA		 105static int zero_clientid(clientid_t *clid)
106{
107 return (clid->cl_boot == 0) && (clid->cl_id == 0);
108}
109
2d8498db 110/**
d5e23383 111 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
ce043ac8 112 * @argp: NFSv4 compound argument structure
ed992753 113 * @len: length of buffer to allocate
2d8498db 114 *
ed992753
TM		 115 * Allocates a buffer of size @len to be freed when processing the compound
116 * operation described in @argp finishes.
2d8498db 117 */
d5e23383
BF		 118static void *
119svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
1da177e4 120{
d5e23383 121 struct svcxdr_tmpbuf *tb;
1da177e4 122
d5e23383 123 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
1da177e4 124 if (!tb)
d5e23383 125 return NULL;
1da177e4
LT		 126 tb->next = argp->to_free;
127 argp->to_free = tb;
d5e23383 128 return tb->buf;
1da177e4
LT		 129}
130
29c353b3
BF		 131/*
132 * For xdr strings that need to be passed to other kernel api's
133 * as null-terminated strings.
134 *
135 * Note null-terminating in place usually isn't safe since the
136 * buffer might end on a page boundary.
137 */
138static char *
139svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
140{
d5e23383 141 char *p = svcxdr_tmpalloc(argp, len + 1);
29c353b3
BF		 142
143 if (!p)
144 return NULL;
145 memcpy(p, buf, len);
146 p[len] = '\0';
29c353b3 147 return p;
1da177e4
LT		 148}
149
7b723008
CL		 150static void *
151svcxdr_savemem(struct nfsd4_compoundargs *argp, __be32 *p, u32 len)
152{
153 __be32 *tmp;
154
155 /*
156 * The location of the decoded data item is stable,
157 * so @p is OK to use. This is the common case.
158 */
159 if (p != argp->xdr->scratch.iov_base)
160 return p;
161
162 tmp = svcxdr_tmpalloc(argp, len);
163 if (!tmp)
164 return NULL;
165 memcpy(tmp, p, len);
166 return tmp;
167}
168
5dcbfabb
CL		 169/*
170 * NFSv4 basic data type decoders
171 */
172
1a994408
CL		 173/*
174 * This helper handles variable-length opaques which belong to protocol
175 * elements that this implementation does not support.
176 */
177static __be32
178nfsd4_decode_ignored_string(struct nfsd4_compoundargs *argp, u32 maxlen)
179{
180 u32 len;
181
182 if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
183 return nfserr_bad_xdr;
184 if (maxlen && len > maxlen)
185 return nfserr_bad_xdr;
186 if (!xdr_inline_decode(argp->xdr, len))
187 return nfserr_bad_xdr;
188
189 return nfs_ok;
190}
191
5dcbfabb
CL		 192static __be32
193nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
194{
195 __be32 *p;
196 u32 len;
197
198 if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
199 return nfserr_bad_xdr;
200 if (len == 0 || len > NFS4_OPAQUE_LIMIT)
201 return nfserr_bad_xdr;
202 p = xdr_inline_decode(argp->xdr, len);
203 if (!p)
204 return nfserr_bad_xdr;
7b723008 205 o->data = svcxdr_savemem(argp, p, len);
5dcbfabb
CL		 206 if (!o->data)
207 return nfserr_jukebox;
208 o->len = len;
5dcbfabb
CL		 209
210 return nfs_ok;
211}
212
000dfa18
CL		 213static __be32
214nfsd4_decode_component4(struct nfsd4_compoundargs *argp, char **namp, u32 *lenp)
215{
216 __be32 *p, status;
217
218 if (xdr_stream_decode_u32(argp->xdr, lenp) < 0)
219 return nfserr_bad_xdr;
220 p = xdr_inline_decode(argp->xdr, *lenp);
221 if (!p)
222 return nfserr_bad_xdr;
223 status = check_filename((char *)p, *lenp);
224 if (status)
225 return status;
7b723008 226 *namp = svcxdr_savemem(argp, p, *lenp);
000dfa18
CL		 227 if (!*namp)
228 return nfserr_jukebox;
000dfa18
CL		 229
230 return nfs_ok;
231}
232
1c3eff7e
CL		 233static __be32
234nfsd4_decode_nfstime4(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
235{
236 __be32 *p;
237
238 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 3);
239 if (!p)
240 return nfserr_bad_xdr;
241 p = xdr_decode_hyper(p, &tv->tv_sec);
242 tv->tv_nsec = be32_to_cpup(p++);
243 if (tv->tv_nsec >= (u32)1000000000)
244 return nfserr_inval;
245 return nfs_ok;
246}
247
796dd1c6
CL		 248static __be32
249nfsd4_decode_verifier4(struct nfsd4_compoundargs *argp, nfs4_verifier *verf)
250{
251 __be32 *p;
252
253 p = xdr_inline_decode(argp->xdr, NFS4_VERIFIER_SIZE);
254 if (!p)
255 return nfserr_bad_xdr;
256 memcpy(verf->data, p, sizeof(verf->data));
257 return nfs_ok;
258}
259
d1c263a0
CL		 260/**
261 * nfsd4_decode_bitmap4 - Decode an NFSv4 bitmap4
262 * @argp: NFSv4 compound argument structure
263 * @bmval: pointer to an array of u32's to decode into
264 * @bmlen: size of the @bmval array
265 *
266 * The server needs to return nfs_ok rather than nfserr_bad_xdr when
267 * encountering bitmaps containing bits it does not recognize. This
268 * includes bits in bitmap words past WORDn, where WORDn is the last
269 * bitmap WORD the implementation currently supports. Thus we are
270 * careful here to simply ignore bits in bitmap words that this
271 * implementation has yet to support explicitly.
272 *
273 * Return values:
274 * %nfs_ok: @bmval populated successfully
275 * %nfserr_bad_xdr: the encoded bitmap was invalid
276 */
277static __be32
278nfsd4_decode_bitmap4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen)
279{
cd2e999c 280 ssize_t status;
d1c263a0 281
cd2e999c
CL		 282 status = xdr_stream_decode_uint32_array(argp->xdr, bmval, bmlen);
283 return status == -EBADMSG ? nfserr_bad_xdr : nfs_ok;
d1c263a0
CL		 284}
285
c941a968
CL		 286static __be32
287nfsd4_decode_nfsace4(struct nfsd4_compoundargs *argp, struct nfs4_ace *ace)
288{
289 __be32 *p, status;
290 u32 length;
291
292 if (xdr_stream_decode_u32(argp->xdr, &ace->type) < 0)
293 return nfserr_bad_xdr;
294 if (xdr_stream_decode_u32(argp->xdr, &ace->flag) < 0)
295 return nfserr_bad_xdr;
296 if (xdr_stream_decode_u32(argp->xdr, &ace->access_mask) < 0)
297 return nfserr_bad_xdr;
298
299 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
300 return nfserr_bad_xdr;
301 p = xdr_inline_decode(argp->xdr, length);
302 if (!p)
303 return nfserr_bad_xdr;
304 ace->whotype = nfs4_acl_get_whotype((char *)p, length);
305 if (ace->whotype != NFS4_ACL_WHO_NAMED)
306 status = nfs_ok;
307 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
308 status = nfsd_map_name_to_gid(argp->rqstp,
309 (char *)p, length, &ace->who_gid);
310 else
311 status = nfsd_map_name_to_uid(argp->rqstp,
312 (char *)p, length, &ace->who_uid);
313
314 return status;
315}
316
317/* A counted array of nfsace4's */
318static noinline __be32
319nfsd4_decode_acl(struct nfsd4_compoundargs *argp, struct nfs4_acl **acl)
320{
321 struct nfs4_ace *ace;
322 __be32 status;
323 u32 count;
324
325 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
326 return nfserr_bad_xdr;
327
328 if (count > xdr_stream_remaining(argp->xdr) / 20)
329 /*
330 * Even with 4-byte names there wouldn't be
331 * space for that many aces; something fishy is
332 * going on:
333 */
334 return nfserr_fbig;
335
336 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(count));
337 if (*acl == NULL)
338 return nfserr_jukebox;
339
340 (*acl)->naces = count;
341 for (ace = (*acl)->aces; ace < (*acl)->aces + count; ace++) {
342 status = nfsd4_decode_nfsace4(argp, ace);
343 if (status)
344 return status;
345 }
346
347 return nfs_ok;
348}
349
dabe9182
CL		 350static noinline __be32
351nfsd4_decode_security_label(struct nfsd4_compoundargs *argp,
352 struct xdr_netobj *label)
353{
354 u32 lfs, pi, length;
355 __be32 *p;
356
357 if (xdr_stream_decode_u32(argp->xdr, &lfs) < 0)
358 return nfserr_bad_xdr;
359 if (xdr_stream_decode_u32(argp->xdr, &pi) < 0)
360 return nfserr_bad_xdr;
361
362 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
363 return nfserr_bad_xdr;
364 if (length > NFS4_MAXLABELLEN)
365 return nfserr_badlabel;
366 p = xdr_inline_decode(argp->xdr, length);
367 if (!p)
368 return nfserr_bad_xdr;
369 label->len = length;
370 label->data = svcxdr_dupstr(argp, p, length);
371 if (!label->data)
372 return nfserr_jukebox;
373
374 return nfs_ok;
375}
376
b37ad28b 377static __be32
d1c263a0
CL		 378nfsd4_decode_fattr4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen,
379 struct iattr *iattr, struct nfs4_acl **acl,
380 struct xdr_netobj *label, int *umask)
1da177e4 381{
081d53fe
CL		 382 unsigned int starting_pos;
383 u32 attrlist4_count;
d1c263a0 384 __be32 *p, status;
1da177e4 385
1da177e4 386 iattr->ia_valid = 0;
d1c263a0
CL		 387 status = nfsd4_decode_bitmap4(argp, bmval, bmlen);
388 if (status)
389 return nfserr_bad_xdr;
1da177e4 390
e864c189
BF		 391 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
392 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
393 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
394 if (nfsd_attrs_supported(argp->minorversion, bmval))
395 return nfserr_inval;
396 return nfserr_attrnotsupp;
397 }
398
081d53fe
CL		 399 if (xdr_stream_decode_u32(argp->xdr, &attrlist4_count) < 0)
400 return nfserr_bad_xdr;
401 starting_pos = xdr_stream_pos(argp->xdr);
1da177e4
LT		 402
403 if (bmval[0] & FATTR4_WORD0_SIZE) {
2ac1b9b2
CL		 404 u64 size;
405
406 if (xdr_stream_decode_u64(argp->xdr, &size) < 0)
407 return nfserr_bad_xdr;
408 iattr->ia_size = size;
1da177e4
LT		 409 iattr->ia_valid |= ATTR_SIZE;
410 }
411 if (bmval[0] & FATTR4_WORD0_ACL) {
c941a968
CL		 412 status = nfsd4_decode_acl(argp, acl);
413 if (status)
414 return status;
1da177e4
LT		 415 } else
416 *acl = NULL;
417 if (bmval[1] & FATTR4_WORD1_MODE) {
1c8f0ad7
CL		 418 u32 mode;
419
420 if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
421 return nfserr_bad_xdr;
422 iattr->ia_mode = mode;
1da177e4
LT		 423 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
424 iattr->ia_valid |= ATTR_MODE;
425 }
426 if (bmval[1] & FATTR4_WORD1_OWNER) {
9853a5ac
CL		 427 u32 length;
428
429 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
430 return nfserr_bad_xdr;
431 p = xdr_inline_decode(argp->xdr, length);
432 if (!p)
433 return nfserr_bad_xdr;
434 status = nfsd_map_name_to_uid(argp->rqstp, (char *)p, length,
435 &iattr->ia_uid);
436 if (status)
47c85291 437 return status;
1da177e4
LT		 438 iattr->ia_valid |= ATTR_UID;
439 }
440 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
393c31dd
CL		 441 u32 length;
442
443 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
444 return nfserr_bad_xdr;
445 p = xdr_inline_decode(argp->xdr, length);
446 if (!p)
447 return nfserr_bad_xdr;
448 status = nfsd_map_name_to_gid(argp->rqstp, (char *)p, length,
449 &iattr->ia_gid);
450 if (status)
47c85291 451 return status;
1da177e4
LT		 452 iattr->ia_valid |= ATTR_GID;
453 }
454 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1c3eff7e
CL		 455 u32 set_it;
456
457 if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
458 return nfserr_bad_xdr;
459 switch (set_it) {
1da177e4 460 case NFS4_SET_TO_CLIENT_TIME:
1c3eff7e 461 status = nfsd4_decode_nfstime4(argp, &iattr->ia_atime);
4c94e13e
CH		 462 if (status)
463 return status;
1da177e4
LT		 464 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
465 break;
466 case NFS4_SET_TO_SERVER_TIME:
467 iattr->ia_valid |= ATTR_ATIME;
468 break;
469 default:
1c3eff7e 470 return nfserr_bad_xdr;
1da177e4
LT		 471 }
472 }
5b2f3e07
CL		 473 if (bmval[1] & FATTR4_WORD1_TIME_CREATE) {
474 struct timespec64 ts;
475
476 /* No Linux filesystem supports setting this attribute. */
477 bmval[1] &= ~FATTR4_WORD1_TIME_CREATE;
478 status = nfsd4_decode_nfstime4(argp, &ts);
479 if (status)
480 return status;
481 }
1da177e4 482 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1c3eff7e
CL		 483 u32 set_it;
484
485 if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
486 return nfserr_bad_xdr;
487 switch (set_it) {
1da177e4 488 case NFS4_SET_TO_CLIENT_TIME:
1c3eff7e 489 status = nfsd4_decode_nfstime4(argp, &iattr->ia_mtime);
4c94e13e
CH		 490 if (status)
491 return status;
1da177e4
LT		 492 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
493 break;
494 case NFS4_SET_TO_SERVER_TIME:
495 iattr->ia_valid |= ATTR_MTIME;
496 break;
497 default:
1c3eff7e 498 return nfserr_bad_xdr;
1da177e4
LT		 499 }
500 }
18032ca0 501 label->len = 0;
2285ae76
AB		 502 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
503 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
dabe9182
CL		 504 status = nfsd4_decode_security_label(argp, label);
505 if (status)
506 return status;
18032ca0 507 }
47057abd 508 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
66f0476c
CL		 509 u32 mode, mask;
510
47057abd 511 if (!umask)
66f0476c
CL		 512 return nfserr_bad_xdr;
513 if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
514 return nfserr_bad_xdr;
515 iattr->ia_mode = mode & (S_IFMT | S_IALLUGO);
516 if (xdr_stream_decode_u32(argp->xdr, &mask) < 0)
517 return nfserr_bad_xdr;
518 *umask = mask & S_IRWXUGO;
47057abd
AG		 519 iattr->ia_valid |= ATTR_MODE;
520 }
081d53fe
CL		 521
522 /* request sanity: did attrlist4 contain the expected number of words? */
523 if (attrlist4_count != xdr_stream_pos(argp->xdr) - starting_pos)
524 return nfserr_bad_xdr;
1da177e4 525
d1c263a0 526 return nfs_ok;
1da177e4
LT		 527}
528
d3d2f381
CL		 529static __be32
530nfsd4_decode_stateid4(struct nfsd4_compoundargs *argp, stateid_t *sid)
531{
532 __be32 *p;
533
534 p = xdr_inline_decode(argp->xdr, NFS4_STATEID_SIZE);
535 if (!p)
536 return nfserr_bad_xdr;
537 sid->si_generation = be32_to_cpup(p++);
538 memcpy(&sid->si_opaque, p, sizeof(sid->si_opaque));
539 return nfs_ok;
540}
541
144e8269
CL		 542static __be32
543nfsd4_decode_clientid4(struct nfsd4_compoundargs *argp, clientid_t *clientid)
544{
545 __be32 *p;
546
547 p = xdr_inline_decode(argp->xdr, sizeof(__be64));
548 if (!p)
549 return nfserr_bad_xdr;
550 memcpy(clientid, p, sizeof(*clientid));
551 return nfs_ok;
552}
553
554static __be32
555nfsd4_decode_state_owner4(struct nfsd4_compoundargs *argp,
556 clientid_t *clientid, struct xdr_netobj *owner)
557{
558 __be32 status;
559
560 status = nfsd4_decode_clientid4(argp, clientid);
561 if (status)
562 return status;
563 return nfsd4_decode_opaque(argp, owner);
564}
565
04495971
CL		 566#ifdef CONFIG_NFSD_PNFS
567static __be32
568nfsd4_decode_deviceid4(struct nfsd4_compoundargs *argp,
569 struct nfsd4_deviceid *devid)
570{
571 __be32 *p;
572
573 p = xdr_inline_decode(argp->xdr, NFS4_DEVICEID4_SIZE);
574 if (!p)
575 return nfserr_bad_xdr;
576 memcpy(devid, p, sizeof(*devid));
577 return nfs_ok;
578}
5185980d
CL		 579
580static __be32
581nfsd4_decode_layoutupdate4(struct nfsd4_compoundargs *argp,
582 struct nfsd4_layoutcommit *lcp)
583{
584 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_layout_type) < 0)
585 return nfserr_bad_xdr;
586 if (lcp->lc_layout_type < LAYOUT_NFSV4_1_FILES)
587 return nfserr_bad_xdr;
588 if (lcp->lc_layout_type >= LAYOUT_TYPE_MAX)
589 return nfserr_bad_xdr;
590
591 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_up_len) < 0)
592 return nfserr_bad_xdr;
593 if (lcp->lc_up_len > 0) {
594 lcp->lc_up_layout = xdr_inline_decode(argp->xdr, lcp->lc_up_len);
595 if (!lcp->lc_up_layout)
596 return nfserr_bad_xdr;
597 }
598
599 return nfs_ok;
600}
601
645fcad3
CL		 602static __be32
603nfsd4_decode_layoutreturn4(struct nfsd4_compoundargs *argp,
604 struct nfsd4_layoutreturn *lrp)
605{
606 __be32 status;
607
608 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_return_type) < 0)
609 return nfserr_bad_xdr;
610 switch (lrp->lr_return_type) {
611 case RETURN_FILE:
612 if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.offset) < 0)
613 return nfserr_bad_xdr;
614 if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.length) < 0)
615 return nfserr_bad_xdr;
616 status = nfsd4_decode_stateid4(argp, &lrp->lr_sid);
617 if (status)
618 return status;
619 if (xdr_stream_decode_u32(argp->xdr, &lrp->lrf_body_len) < 0)
620 return nfserr_bad_xdr;
621 if (lrp->lrf_body_len > 0) {
622 lrp->lrf_body = xdr_inline_decode(argp->xdr, lrp->lrf_body_len);
623 if (!lrp->lrf_body)
624 return nfserr_bad_xdr;
625 }
626 break;
627 case RETURN_FSID:
628 case RETURN_ALL:
629 lrp->lr_seg.offset = 0;
630 lrp->lr_seg.length = NFS4_MAX_UINT64;
631 break;
632 default:
633 return nfserr_bad_xdr;
634 }
635
636 return nfs_ok;
637}
638
04495971
CL		 639#endif /* CONFIG_NFSD_PNFS */
640
571e0451
CL		 641static __be32
642nfsd4_decode_sessionid4(struct nfsd4_compoundargs *argp,
643 struct nfs4_sessionid *sessionid)
644{
645 __be32 *p;
646
647 p = xdr_inline_decode(argp->xdr, NFS4_MAX_SESSIONID_LEN);
648 if (!p)
649 return nfserr_bad_xdr;
650 memcpy(sessionid->data, p, sizeof(sessionid->data));
651 return nfs_ok;
652}
653
1a994408
CL		 654/* Defined in Appendix A of RFC 5531 */
655static __be32
656nfsd4_decode_authsys_parms(struct nfsd4_compoundargs *argp,
657 struct nfsd4_cb_sec *cbs)
acb2887e 658{
1a994408
CL		 659 u32 stamp, gidcount, uid, gid;
660 __be32 *p, status;
661
662 if (xdr_stream_decode_u32(argp->xdr, &stamp) < 0)
663 return nfserr_bad_xdr;
664 /* machine name */
665 status = nfsd4_decode_ignored_string(argp, 255);
666 if (status)
667 return status;
668 if (xdr_stream_decode_u32(argp->xdr, &uid) < 0)
669 return nfserr_bad_xdr;
670 if (xdr_stream_decode_u32(argp->xdr, &gid) < 0)
671 return nfserr_bad_xdr;
672 if (xdr_stream_decode_u32(argp->xdr, &gidcount) < 0)
673 return nfserr_bad_xdr;
674 if (gidcount > 16)
675 return nfserr_bad_xdr;
676 p = xdr_inline_decode(argp->xdr, gidcount << 2);
677 if (!p)
678 return nfserr_bad_xdr;
679 if (cbs->flavor == (u32)(-1)) {
680 struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
681
682 kuid_t kuid = make_kuid(userns, uid);
683 kgid_t kgid = make_kgid(userns, gid);
684 if (uid_valid(kuid) && gid_valid(kgid)) {
685 cbs->uid = kuid;
686 cbs->gid = kgid;
687 cbs->flavor = RPC_AUTH_UNIX;
688 } else {
689 dprintk("RPC_AUTH_UNIX with invalid uid or gid, ignoring!\n");
690 }
691 }
692
693 return nfs_ok;
694}
695
696static __be32
697nfsd4_decode_gss_cb_handles4(struct nfsd4_compoundargs *argp,
698 struct nfsd4_cb_sec *cbs)
699{
700 __be32 status;
701 u32 service;
702
703 dprintk("RPC_AUTH_GSS callback secflavor not supported!\n");
704
705 if (xdr_stream_decode_u32(argp->xdr, &service) < 0)
706 return nfserr_bad_xdr;
707 if (service < RPC_GSS_SVC_NONE || service > RPC_GSS_SVC_PRIVACY)
708 return nfserr_bad_xdr;
709 /* gcbp_handle_from_server */
710 status = nfsd4_decode_ignored_string(argp, 0);
711 if (status)
712 return status;
713 /* gcbp_handle_from_client */
714 status = nfsd4_decode_ignored_string(argp, 0);
715 if (status)
716 return status;
717
718 return nfs_ok;
719}
720
721/* a counted array of callback_sec_parms4 items */
722static __be32
723nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
724{
725 u32 i, secflavor, nr_secflavs;
726 __be32 status;
acb2887e
BF		 727
728 /* callback_sec_params4 */
1a994408
CL		 729 if (xdr_stream_decode_u32(argp->xdr, &nr_secflavs) < 0)
730 return nfserr_bad_xdr;
57569a70
BF		 731 if (nr_secflavs)
732 cbs->flavor = (u32)(-1);
733 else
734 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
735 cbs->flavor = 0;
1a994408 736
acb2887e 737 for (i = 0; i < nr_secflavs; ++i) {
1a994408
CL		 738 if (xdr_stream_decode_u32(argp->xdr, &secflavor) < 0)
739 return nfserr_bad_xdr;
740 switch (secflavor) {
acb2887e 741 case RPC_AUTH_NULL:
1a994408 742 /* void */
12fc3e92
BF		 743 if (cbs->flavor == (u32)(-1))
744 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 745 break;
746 case RPC_AUTH_UNIX:
1a994408
CL		 747 status = nfsd4_decode_authsys_parms(argp, cbs);
748 if (status)
749 return status;
acb2887e
BF		 750 break;
751 case RPC_AUTH_GSS:
1a994408
CL		 752 status = nfsd4_decode_gss_cb_handles4(argp, cbs);
753 if (status)
754 return status;
acb2887e
BF		 755 break;
756 default:
acb2887e
BF		 757 return nfserr_inval;
758 }
759 }
1a994408
CL		 760
761 return nfs_ok;
acb2887e
BF		 762}
763
1a994408 764
d169a6a9
CL		 765/*
766 * NFSv4 operation argument decoders
767 */
768
769static __be32
770nfsd4_decode_access(struct nfsd4_compoundargs *argp,
771 struct nfsd4_access *access)
772{
773 if (xdr_stream_decode_u32(argp->xdr, &access->ac_req_access) < 0)
774 return nfserr_bad_xdr;
775 return nfs_ok;
776}
777
b37ad28b 778static __be32
1da177e4
LT		 779nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
780{
d3d2f381
CL		 781 if (xdr_stream_decode_u32(argp->xdr, &close->cl_seqid) < 0)
782 return nfserr_bad_xdr;
783 return nfsd4_decode_stateid4(argp, &close->cl_stateid);
1da177e4
LT		 784}
785
786
b37ad28b 787static __be32
1da177e4
LT		 788nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
789{
cbd9abb3
CL		 790 if (xdr_stream_decode_u64(argp->xdr, &commit->co_offset) < 0)
791 return nfserr_bad_xdr;
792 if (xdr_stream_decode_u32(argp->xdr, &commit->co_count) < 0)
793 return nfserr_bad_xdr;
794 return nfs_ok;
1da177e4
LT		 795}
796
b37ad28b 797static __be32
1da177e4
LT		 798nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
799{
000dfa18 800 __be32 *p, status;
1da177e4 801
000dfa18
CL		 802 if (xdr_stream_decode_u32(argp->xdr, &create->cr_type) < 0)
803 return nfserr_bad_xdr;
1da177e4
LT		 804 switch (create->cr_type) {
805 case NF4LNK:
000dfa18
CL		 806 if (xdr_stream_decode_u32(argp->xdr, &create->cr_datalen) < 0)
807 return nfserr_bad_xdr;
808 p = xdr_inline_decode(argp->xdr, create->cr_datalen);
809 if (!p)
810 return nfserr_bad_xdr;
29c353b3 811 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
7fb84306 812 if (!create->cr_data)
76f47128 813 return nfserr_jukebox;
1da177e4
LT		 814 break;
815 case NF4BLK:
816 case NF4CHR:
000dfa18
CL		 817 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata1) < 0)
818 return nfserr_bad_xdr;
819 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata2) < 0)
820 return nfserr_bad_xdr;
1da177e4
LT		 821 break;
822 case NF4SOCK:
823 case NF4FIFO:
824 case NF4DIR:
825 default:
826 break;
827 }
000dfa18
CL		 828 status = nfsd4_decode_component4(argp, &create->cr_name,
829 &create->cr_namelen);
830 if (status)
1da177e4 831 return status;
d1c263a0
CL		 832 status = nfsd4_decode_fattr4(argp, create->cr_bmval,
833 ARRAY_SIZE(create->cr_bmval),
834 &create->cr_iattr, &create->cr_acl,
835 &create->cr_label, &create->cr_umask);
c0d6fc8a 836 if (status)
000dfa18 837 return status;
1da177e4 838
000dfa18 839 return nfs_ok;
1da177e4
LT		 840}
841
b37ad28b 842static inline __be32
1da177e4
LT		 843nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
844{
95e6482c 845 return nfsd4_decode_stateid4(argp, &dr->dr_stateid);
1da177e4
LT		 846}
847
b37ad28b 848static inline __be32
1da177e4
LT		 849nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
850{
f759eff2
CL		 851 return nfsd4_decode_bitmap4(argp, getattr->ga_bmval,
852 ARRAY_SIZE(getattr->ga_bmval));
1da177e4
LT		 853}
854
b37ad28b 855static __be32
1da177e4
LT		 856nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
857{
5c505d12 858 return nfsd4_decode_component4(argp, &link->li_name, &link->li_namelen);
1da177e4
LT		 859}
860
8918cc0d
CL		 861static __be32
862nfsd4_decode_open_to_lock_owner4(struct nfsd4_compoundargs *argp,
863 struct nfsd4_lock *lock)
864{
865 __be32 status;
866
867 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_open_seqid) < 0)
868 return nfserr_bad_xdr;
869 status = nfsd4_decode_stateid4(argp, &lock->lk_new_open_stateid);
870 if (status)
871 return status;
872 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_lock_seqid) < 0)
873 return nfserr_bad_xdr;
874 return nfsd4_decode_state_owner4(argp, &lock->lk_new_clientid,
875 &lock->lk_new_owner);
876}
877
878static __be32
879nfsd4_decode_exist_lock_owner4(struct nfsd4_compoundargs *argp,
880 struct nfsd4_lock *lock)
881{
882 __be32 status;
883
884 status = nfsd4_decode_stateid4(argp, &lock->lk_old_lock_stateid);
885 if (status)
886 return status;
887 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_old_lock_seqid) < 0)
888 return nfserr_bad_xdr;
889
890 return nfs_ok;
891}
892
893static __be32
894nfsd4_decode_locker4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
895{
896 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_is_new) < 0)
897 return nfserr_bad_xdr;
898 if (lock->lk_is_new)
899 return nfsd4_decode_open_to_lock_owner4(argp, lock);
900 return nfsd4_decode_exist_lock_owner4(argp, lock);
901}
902
b37ad28b 903static __be32
1da177e4
LT		 904nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
905{
7c59deed
CL		 906 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_type) < 0)
907 return nfserr_bad_xdr;
1da177e4 908 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
7c59deed
CL		 909 return nfserr_bad_xdr;
910 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_reclaim) < 0)
911 return nfserr_bad_xdr;
912 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_offset) < 0)
913 return nfserr_bad_xdr;
914 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_length) < 0)
915 return nfserr_bad_xdr;
916 return nfsd4_decode_locker4(argp, lock);
1da177e4
LT		 917}
918
b37ad28b 919static __be32
1da177e4
LT		 920nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
921{
0a146f04
CL		 922 if (xdr_stream_decode_u32(argp->xdr, &lockt->lt_type) < 0)
923 return nfserr_bad_xdr;
924 if ((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
925 return nfserr_bad_xdr;
926 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_offset) < 0)
927 return nfserr_bad_xdr;
928 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_length) < 0)
929 return nfserr_bad_xdr;
930 return nfsd4_decode_state_owner4(argp, &lockt->lt_clientid,
931 &lockt->lt_owner);
1da177e4
LT		 932}
933
b37ad28b 934static __be32
1da177e4
LT		 935nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
936{
ca9cf9fc 937 __be32 status;
1da177e4 938
ca9cf9fc
CL		 939 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_type) < 0)
940 return nfserr_bad_xdr;
1da177e4 941 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
ca9cf9fc
CL		 942 return nfserr_bad_xdr;
943 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_seqid) < 0)
944 return nfserr_bad_xdr;
945 status = nfsd4_decode_stateid4(argp, &locku->lu_stateid);
e31a1b66
BH		 946 if (status)
947 return status;
ca9cf9fc
CL		 948 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_offset) < 0)
949 return nfserr_bad_xdr;
950 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_length) < 0)
951 return nfserr_bad_xdr;
1da177e4 952
ca9cf9fc 953 return nfs_ok;
1da177e4
LT		 954}
955
b37ad28b 956static __be32
1da177e4
LT		 957nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
958{
3d5877e8 959 return nfsd4_decode_component4(argp, &lookup->lo_name, &lookup->lo_len);
1da177e4
LT		 960}
961
bf33bab3
CL		 962static __be32
963nfsd4_decode_createhow4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
964{
965 __be32 status;
966
967 if (xdr_stream_decode_u32(argp->xdr, &open->op_createmode) < 0)
968 return nfserr_bad_xdr;
969 switch (open->op_createmode) {
970 case NFS4_CREATE_UNCHECKED:
971 case NFS4_CREATE_GUARDED:
972 status = nfsd4_decode_fattr4(argp, open->op_bmval,
973 ARRAY_SIZE(open->op_bmval),
974 &open->op_iattr, &open->op_acl,
975 &open->op_label, &open->op_umask);
976 if (status)
977 return status;
978 break;
979 case NFS4_CREATE_EXCLUSIVE:
980 status = nfsd4_decode_verifier4(argp, &open->op_verf);
981 if (status)
982 return status;
983 break;
984 case NFS4_CREATE_EXCLUSIVE4_1:
985 if (argp->minorversion < 1)
986 return nfserr_bad_xdr;
987 status = nfsd4_decode_verifier4(argp, &open->op_verf);
988 if (status)
989 return status;
990 status = nfsd4_decode_fattr4(argp, open->op_bmval,
991 ARRAY_SIZE(open->op_bmval),
992 &open->op_iattr, &open->op_acl,
993 &open->op_label, &open->op_umask);
994 if (status)
995 return status;
996 break;
997 default:
998 return nfserr_bad_xdr;
999 }
1000
1001 return nfs_ok;
1002}
1003
e6ec04b2
CL		 1004static __be32
1005nfsd4_decode_openflag4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
1006{
1007 __be32 status;
1008
1009 if (xdr_stream_decode_u32(argp->xdr, &open->op_create) < 0)
1010 return nfserr_bad_xdr;
1011 switch (open->op_create) {
1012 case NFS4_OPEN_NOCREATE:
1013 break;
1014 case NFS4_OPEN_CREATE:
1015 status = nfsd4_decode_createhow4(argp, open);
1016 if (status)
1017 return status;
1018 break;
1019 default:
1020 return nfserr_bad_xdr;
1021 }
1022
1023 return nfs_ok;
1024}
1025
2c8bd7e0 1026static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664 1027{
04f9e664
BF		 1028 u32 w;
1029
9aa62f51
CL		 1030 if (xdr_stream_decode_u32(argp->xdr, &w) < 0)
1031 return nfserr_bad_xdr;
2c8bd7e0
BH		 1032 *share_access = w & NFS4_SHARE_ACCESS_MASK;
1033 *deleg_want = w & NFS4_SHARE_WANT_MASK;
1034 if (deleg_when)
1035 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
1036
04f9e664
BF		 1037 switch (w & NFS4_SHARE_ACCESS_MASK) {
1038 case NFS4_SHARE_ACCESS_READ:
1039 case NFS4_SHARE_ACCESS_WRITE:
1040 case NFS4_SHARE_ACCESS_BOTH:
1041 break;
1042 default:
1043 return nfserr_bad_xdr;
1044 }
fc0d14fe 1045 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 1046 if (!w)
1047 return nfs_ok;
1048 if (!argp->minorversion)
1049 return nfserr_bad_xdr;
1050 switch (w & NFS4_SHARE_WANT_MASK) {
1051 case NFS4_SHARE_WANT_NO_PREFERENCE:
1052 case NFS4_SHARE_WANT_READ_DELEG:
1053 case NFS4_SHARE_WANT_WRITE_DELEG:
1054 case NFS4_SHARE_WANT_ANY_DELEG:
1055 case NFS4_SHARE_WANT_NO_DELEG:
1056 case NFS4_SHARE_WANT_CANCEL:
1057 break;
1058 default:
1059 return nfserr_bad_xdr;
1060 }
92bac8c5 1061 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 1062 if (!w)
1063 return nfs_ok;
2c8bd7e0
BH		 1064
1065 if (!deleg_when) /* open_downgrade */
1066 return nfserr_inval;
04f9e664
BF		 1067 switch (w) {
1068 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
1069 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 1070 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
1071 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 1072 return nfs_ok;
1073 }
04f9e664
BF		 1074 return nfserr_bad_xdr;
1075}
1076
1077static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
1078{
b07bebd9
CL		 1079 if (xdr_stream_decode_u32(argp->xdr, x) < 0)
1080 return nfserr_bad_xdr;
1081 /* Note: unlike access bits, deny bits may be zero. */
01cd4afa 1082 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664 1083 return nfserr_bad_xdr;
b07bebd9 1084
04f9e664 1085 return nfs_ok;
04f9e664
BF		 1086}
1087
1708e50b
CL		 1088static __be32
1089nfsd4_decode_open_claim4(struct nfsd4_compoundargs *argp,
1090 struct nfsd4_open *open)
1091{
1092 __be32 status;
1093
1094 if (xdr_stream_decode_u32(argp->xdr, &open->op_claim_type) < 0)
1095 return nfserr_bad_xdr;
1096 switch (open->op_claim_type) {
1097 case NFS4_OPEN_CLAIM_NULL:
1098 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1099 status = nfsd4_decode_component4(argp, &open->op_fname,
1100 &open->op_fnamelen);
1101 if (status)
1102 return status;
1103 break;
1104 case NFS4_OPEN_CLAIM_PREVIOUS:
1105 if (xdr_stream_decode_u32(argp->xdr, &open->op_delegate_type) < 0)
1106 return nfserr_bad_xdr;
1107 break;
1108 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1109 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1110 if (status)
1111 return status;
1112 status = nfsd4_decode_component4(argp, &open->op_fname,
1113 &open->op_fnamelen);
1114 if (status)
1115 return status;
1116 break;
1117 case NFS4_OPEN_CLAIM_FH:
1118 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1119 if (argp->minorversion < 1)
1120 return nfserr_bad_xdr;
1121 /* void */
1122 break;
1123 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1124 if (argp->minorversion < 1)
1125 return nfserr_bad_xdr;
1126 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1127 if (status)
1128 return status;
1129 break;
1130 default:
1131 return nfserr_bad_xdr;
1132 }
1133
1134 return nfs_ok;
1135}
1136
b37ad28b 1137static __be32
1da177e4
LT		 1138nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
1139{
61e5e0b3 1140 __be32 status;
2c8bd7e0 1141 u32 dummy;
1da177e4
LT		 1142
1143 memset(open->op_bmval, 0, sizeof(open->op_bmval));
1144 open->op_iattr.ia_valid = 0;
fe0750e5 1145 open->op_openowner = NULL;
1da177e4 1146
9d313b17 1147 open->op_xdr_error = 0;
61e5e0b3
CL		 1148 if (xdr_stream_decode_u32(argp->xdr, &open->op_seqid) < 0)
1149 return nfserr_bad_xdr;
1150 /* deleg_want is ignored */
2c8bd7e0
BH		 1151 status = nfsd4_decode_share_access(argp, &open->op_share_access,
1152 &open->op_deleg_want, &dummy);
04f9e664 1153 if (status)
61e5e0b3 1154 return status;
04f9e664
BF		 1155 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
1156 if (status)
61e5e0b3
CL		 1157 return status;
1158 status = nfsd4_decode_state_owner4(argp, &open->op_clientid,
1159 &open->op_owner);
a084daf5 1160 if (status)
61e5e0b3 1161 return status;
e6ec04b2
CL		 1162 status = nfsd4_decode_openflag4(argp, open);
1163 if (status)
1164 return status;
61e5e0b3 1165 return nfsd4_decode_open_claim4(argp, open);
1da177e4
LT		 1166}
1167
b37ad28b 1168static __be32
1da177e4
LT		 1169nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1170{
06bee693 1171 __be32 status;
e1a90ebd
AS		 1172
1173 if (argp->minorversion >= 1)
1174 return nfserr_notsupp;
1175
06bee693 1176 status = nfsd4_decode_stateid4(argp, &open_conf->oc_req_stateid);
e31a1b66
BH		 1177 if (status)
1178 return status;
06bee693
CL		 1179 if (xdr_stream_decode_u32(argp->xdr, &open_conf->oc_seqid) < 0)
1180 return nfserr_bad_xdr;
e1a90ebd 1181
06bee693 1182 return nfs_ok;
1da177e4
LT		 1183}
1184
b37ad28b 1185static __be32
1da177e4
LT		 1186nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1187{
dca71651
CL		 1188 __be32 status;
1189
1190 status = nfsd4_decode_stateid4(argp, &open_down->od_stateid);
e31a1b66
BH		 1191 if (status)
1192 return status;
dca71651
CL		 1193 if (xdr_stream_decode_u32(argp->xdr, &open_down->od_seqid) < 0)
1194 return nfserr_bad_xdr;
1195 /* deleg_want is ignored */
2c8bd7e0
BH		 1196 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1197 &open_down->od_deleg_want, NULL);
04f9e664
BF		 1198 if (status)
1199 return status;
dca71651 1200 return nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1da177e4
LT		 1201}
1202
b37ad28b 1203static __be32
1da177e4
LT		 1204nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1205{
a73bed98 1206 __be32 *p;
1da177e4 1207
a73bed98
CL		 1208 if (xdr_stream_decode_u32(argp->xdr, &putfh->pf_fhlen) < 0)
1209 return nfserr_bad_xdr;
1da177e4 1210 if (putfh->pf_fhlen > NFS4_FHSIZE)
a73bed98
CL		 1211 return nfserr_bad_xdr;
1212 p = xdr_inline_decode(argp->xdr, putfh->pf_fhlen);
1213 if (!p)
1214 return nfserr_bad_xdr;
7b723008 1215 putfh->pf_fhval = svcxdr_savemem(argp, p, putfh->pf_fhlen);
a73bed98
CL		 1216 if (!putfh->pf_fhval)
1217 return nfserr_jukebox;
1da177e4 1218
a73bed98 1219 return nfs_ok;
1da177e4
LT		 1220}
1221
e1a90ebd
AS		 1222static __be32
1223nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1224{
1225 if (argp->minorversion == 0)
1226 return nfs_ok;
1227 return nfserr_notsupp;
1228}
1229
b37ad28b 1230static __be32
1da177e4
LT		 1231nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1232{
3909c3bc 1233 __be32 status;
1da177e4 1234
3909c3bc 1235 status = nfsd4_decode_stateid4(argp, &read->rd_stateid);
e31a1b66
BH		 1236 if (status)
1237 return status;
3909c3bc
CL		 1238 if (xdr_stream_decode_u64(argp->xdr, &read->rd_offset) < 0)
1239 return nfserr_bad_xdr;
1240 if (xdr_stream_decode_u32(argp->xdr, &read->rd_length) < 0)
1241 return nfserr_bad_xdr;
1da177e4 1242
3909c3bc 1243 return nfs_ok;
1da177e4
LT		 1244}
1245
b37ad28b 1246static __be32
1da177e4
LT		 1247nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1248{
0dfaf2a3 1249 __be32 status;
1da177e4 1250
0dfaf2a3
CL		 1251 if (xdr_stream_decode_u64(argp->xdr, &readdir->rd_cookie) < 0)
1252 return nfserr_bad_xdr;
1253 status = nfsd4_decode_verifier4(argp, &readdir->rd_verf);
1254 if (status)
1255 return status;
1256 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_dircount) < 0)
1257 return nfserr_bad_xdr;
1258 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_maxcount) < 0)
1259 return nfserr_bad_xdr;
1260 if (xdr_stream_decode_uint32_array(argp->xdr, readdir->rd_bmval,
1261 ARRAY_SIZE(readdir->rd_bmval)) < 0)
1262 return nfserr_bad_xdr;
1da177e4 1263
0dfaf2a3 1264 return nfs_ok;
1da177e4
LT		 1265}
1266
b37ad28b 1267static __be32
1da177e4
LT		 1268nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1269{
b7f5fbf2 1270 return nfsd4_decode_component4(argp, &remove->rm_name, &remove->rm_namelen);
1da177e4
LT		 1271}
1272
b37ad28b 1273static __be32
1da177e4
LT		 1274nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1275{
ba881a0a 1276 __be32 status;
1da177e4 1277
ba881a0a
CL		 1278 status = nfsd4_decode_component4(argp, &rename->rn_sname, &rename->rn_snamelen);
1279 if (status)
1da177e4 1280 return status;
ba881a0a 1281 return nfsd4_decode_component4(argp, &rename->rn_tname, &rename->rn_tnamelen);
1da177e4
LT		 1282}
1283
b37ad28b 1284static __be32
1da177e4
LT		 1285nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1286{
d12f9045 1287 return nfsd4_decode_clientid4(argp, clientid);
1da177e4
LT		 1288}
1289
dcb488a3
AA		 1290static __be32
1291nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1292 struct nfsd4_secinfo *secinfo)
1293{
d0abdae5 1294 return nfsd4_decode_component4(argp, &secinfo->si_name, &secinfo->si_namelen);
dcb488a3
AA		 1295}
1296
b37ad28b 1297static __be32
1da177e4
LT		 1298nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1299{
e31a1b66 1300 __be32 status;
1da177e4 1301
44592fe9 1302 status = nfsd4_decode_stateid4(argp, &setattr->sa_stateid);
e31a1b66
BH		 1303 if (status)
1304 return status;
d1c263a0
CL		 1305 return nfsd4_decode_fattr4(argp, setattr->sa_bmval,
1306 ARRAY_SIZE(setattr->sa_bmval),
1307 &setattr->sa_iattr, &setattr->sa_acl,
1308 &setattr->sa_label, NULL);
1da177e4
LT		 1309}
1310
b37ad28b 1311static __be32
1da177e4
LT		 1312nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1313{
92fa6c08 1314 __be32 *p, status;
1da177e4 1315
e1a90ebd
AS		 1316 if (argp->minorversion >= 1)
1317 return nfserr_notsupp;
1318
92fa6c08
CL		 1319 status = nfsd4_decode_verifier4(argp, &setclientid->se_verf);
1320 if (status)
1321 return status;
a084daf5
BF		 1322 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1323 if (status)
92fa6c08
CL		 1324 return status;
1325 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_prog) < 0)
a084daf5 1326 return nfserr_bad_xdr;
92fa6c08
CL		 1327 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_netid_len) < 0)
1328 return nfserr_bad_xdr;
1329 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_netid_len);
1330 if (!p)
1331 return nfserr_bad_xdr;
7b723008 1332 setclientid->se_callback_netid_val = svcxdr_savemem(argp, p,
92fa6c08
CL		 1333 setclientid->se_callback_netid_len);
1334 if (!setclientid->se_callback_netid_val)
1335 return nfserr_jukebox;
1da177e4 1336
92fa6c08
CL		 1337 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_addr_len) < 0)
1338 return nfserr_bad_xdr;
1339 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_addr_len);
1340 if (!p)
1341 return nfserr_bad_xdr;
7b723008 1342 setclientid->se_callback_addr_val = svcxdr_savemem(argp, p,
92fa6c08
CL		 1343 setclientid->se_callback_addr_len);
1344 if (!setclientid->se_callback_addr_val)
1345 return nfserr_jukebox;
92fa6c08
CL		 1346 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_ident) < 0)
1347 return nfserr_bad_xdr;
1da177e4 1348
92fa6c08 1349 return nfs_ok;
1da177e4
LT		 1350}
1351
b37ad28b 1352static __be32
1da177e4
LT		 1353nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1354{
d1ca5514 1355 __be32 status;
1da177e4 1356
e1a90ebd
AS		 1357 if (argp->minorversion >= 1)
1358 return nfserr_notsupp;
1359
d1ca5514
CL		 1360 status = nfsd4_decode_clientid4(argp, &scd_c->sc_clientid);
1361 if (status)
1362 return status;
1363 return nfsd4_decode_verifier4(argp, &scd_c->sc_confirm);
1da177e4
LT		 1364}
1365
1366/* Also used for NVERIFY */
b37ad28b 1367static __be32
1da177e4
LT		 1368nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1369{
67cd453e 1370 __be32 *p, status;
1da177e4 1371
67cd453e
CL		 1372 status = nfsd4_decode_bitmap4(argp, verify->ve_bmval,
1373 ARRAY_SIZE(verify->ve_bmval));
1374 if (status)
1375 return status;
1da177e4
LT		 1376
1377 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1378 * nfsd4_proc_verify */
1379
67cd453e
CL		 1380 if (xdr_stream_decode_u32(argp->xdr, &verify->ve_attrlen) < 0)
1381 return nfserr_bad_xdr;
1382 p = xdr_inline_decode(argp->xdr, verify->ve_attrlen);
1383 if (!p)
1384 return nfserr_bad_xdr;
7b723008 1385 verify->ve_attrval = svcxdr_savemem(argp, p, verify->ve_attrlen);
67cd453e
CL		 1386 if (!verify->ve_attrval)
1387 return nfserr_jukebox;
1da177e4 1388
67cd453e 1389 return nfs_ok;
1da177e4
LT		 1390}
1391
b37ad28b 1392static __be32
1da177e4
LT		 1393nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1394{
244e2bef 1395 __be32 status;
1da177e4 1396
244e2bef 1397 status = nfsd4_decode_stateid4(argp, &write->wr_stateid);
e31a1b66
BH		 1398 if (status)
1399 return status;
244e2bef
CL		 1400 if (xdr_stream_decode_u64(argp->xdr, &write->wr_offset) < 0)
1401 return nfserr_bad_xdr;
1402 if (xdr_stream_decode_u32(argp->xdr, &write->wr_stable_how) < 0)
1403 return nfserr_bad_xdr;
54bbb7d2 1404 if (write->wr_stable_how > NFS_FILE_SYNC)
244e2bef
CL		 1405 return nfserr_bad_xdr;
1406 if (xdr_stream_decode_u32(argp->xdr, &write->wr_buflen) < 0)
1407 return nfserr_bad_xdr;
c1346a12 1408 if (!xdr_stream_subsegment(argp->xdr, &write->wr_payload, write->wr_buflen))
244e2bef 1409 return nfserr_bad_xdr;
1da177e4 1410
244e2bef 1411 return nfs_ok;
1da177e4
LT		 1412}
1413
b37ad28b 1414static __be32
1da177e4
LT		 1415nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1416{
a4a80c15 1417 __be32 status;
1da177e4 1418
e1a90ebd
AS		 1419 if (argp->minorversion >= 1)
1420 return nfserr_notsupp;
1421
a4a80c15
CL		 1422 status = nfsd4_decode_state_owner4(argp, &rlockowner->rl_clientid,
1423 &rlockowner->rl_owner);
1424 if (status)
1425 return status;
1da177e4 1426
60adfc50
AA		 1427 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1428 return nfserr_inval;
a4a80c15
CL		 1429
1430 return nfs_ok;
1da177e4
LT		 1431}
1432
0f81d960
CL		 1433static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
1434{
1435 if (xdr_stream_decode_u32(argp->xdr, &bc->bc_cb_program) < 0)
1436 return nfserr_bad_xdr;
1437 return nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
1438}
1439
571e0451
CL		 1440static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
1441{
1442 u32 use_conn_in_rdma_mode;
1443 __be32 status;
1444
1445 status = nfsd4_decode_sessionid4(argp, &bcts->sessionid);
1446 if (status)
1447 return status;
1448 if (xdr_stream_decode_u32(argp->xdr, &bcts->dir) < 0)
1449 return nfserr_bad_xdr;
1450 if (xdr_stream_decode_u32(argp->xdr, &use_conn_in_rdma_mode) < 0)
1451 return nfserr_bad_xdr;
1452
1453 return nfs_ok;
1454}
1455
2548aa78
CL		 1456static __be32
1457nfsd4_decode_state_protect_ops(struct nfsd4_compoundargs *argp,
1458 struct nfsd4_exchange_id *exid)
1459{
1460 __be32 status;
1461
1462 status = nfsd4_decode_bitmap4(argp, exid->spo_must_enforce,
1463 ARRAY_SIZE(exid->spo_must_enforce));
1464 if (status)
1465 return nfserr_bad_xdr;
1466 status = nfsd4_decode_bitmap4(argp, exid->spo_must_allow,
1467 ARRAY_SIZE(exid->spo_must_allow));
1468 if (status)
1469 return nfserr_bad_xdr;
1470
1471 return nfs_ok;
1472}
1473
547bfeb4
CL		 1474/*
1475 * This implementation currently does not support SP4_SSV.
1476 * This decoder simply skips over these arguments.
1477 */
1478static noinline __be32
1479nfsd4_decode_ssv_sp_parms(struct nfsd4_compoundargs *argp,
1480 struct nfsd4_exchange_id *exid)
1481{
1482 u32 count, window, num_gss_handles;
1483 __be32 status;
1484
1485 /* ssp_ops */
1486 status = nfsd4_decode_state_protect_ops(argp, exid);
1487 if (status)
1488 return status;
1489
1490 /* ssp_hash_algs<> */
1491 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1492 return nfserr_bad_xdr;
1493 while (count--) {
1494 status = nfsd4_decode_ignored_string(argp, 0);
1495 if (status)
1496 return status;
1497 }
1498
1499 /* ssp_encr_algs<> */
1500 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1501 return nfserr_bad_xdr;
1502 while (count--) {
1503 status = nfsd4_decode_ignored_string(argp, 0);
1504 if (status)
1505 return status;
1506 }
1507
1508 if (xdr_stream_decode_u32(argp->xdr, &window) < 0)
1509 return nfserr_bad_xdr;
1510 if (xdr_stream_decode_u32(argp->xdr, &num_gss_handles) < 0)
1511 return nfserr_bad_xdr;
1512
1513 return nfs_ok;
1514}
1515
2db134eb 1516static __be32
523ec6ed
CL		 1517nfsd4_decode_state_protect4_a(struct nfsd4_compoundargs *argp,
1518 struct nfsd4_exchange_id *exid)
2db134eb 1519{
523ec6ed 1520 __be32 status;
0733d213 1521
523ec6ed 1522 if (xdr_stream_decode_u32(argp->xdr, &exid->spa_how) < 0)
a084daf5 1523 return nfserr_bad_xdr;
0733d213
AA		 1524 switch (exid->spa_how) {
1525 case SP4_NONE:
1526 break;
1527 case SP4_MACH_CRED:
2548aa78 1528 status = nfsd4_decode_state_protect_ops(argp, exid);
ed941643 1529 if (status)
2548aa78 1530 return status;
0733d213
AA		 1531 break;
1532 case SP4_SSV:
547bfeb4 1533 status = nfsd4_decode_ssv_sp_parms(argp, exid);
2548aa78
CL		 1534 if (status)
1535 return status;
0733d213
AA		 1536 break;
1537 default:
523ec6ed 1538 return nfserr_bad_xdr;
0733d213
AA		 1539 }
1540
523ec6ed
CL		 1541 return nfs_ok;
1542}
1543
10ff8422
CL		 1544static __be32
1545nfsd4_decode_nfs_impl_id4(struct nfsd4_compoundargs *argp,
1546 struct nfsd4_exchange_id *exid)
1547{
1548 __be32 status;
1549 u32 count;
1550
1551 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1552 return nfserr_bad_xdr;
1553 switch (count) {
1554 case 0:
1555 break;
1556 case 1:
1557 /* Note that RFC 8881 places no length limit on
1558 * nii_domain, but this implementation permits no
1559 * more than NFS4_OPAQUE_LIMIT bytes */
1560 status = nfsd4_decode_opaque(argp, &exid->nii_domain);
1561 if (status)
1562 return status;
1563 /* Note that RFC 8881 places no length limit on
1564 * nii_name, but this implementation permits no
1565 * more than NFS4_OPAQUE_LIMIT bytes */
1566 status = nfsd4_decode_opaque(argp, &exid->nii_name);
1567 if (status)
1568 return status;
1569 status = nfsd4_decode_nfstime4(argp, &exid->nii_time);
1570 if (status)
1571 return status;
1572 break;
1573 default:
1574 return nfserr_bad_xdr;
1575 }
1576
1577 return nfs_ok;
1578}
1579
523ec6ed
CL		 1580static __be32
1581nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1582 struct nfsd4_exchange_id *exid)
1583{
10ff8422 1584 __be32 status;
523ec6ed
CL		 1585
1586 status = nfsd4_decode_verifier4(argp, &exid->verifier);
1587 if (status)
1588 return status;
1589 status = nfsd4_decode_opaque(argp, &exid->clname);
1590 if (status)
1591 return status;
1592 if (xdr_stream_decode_u32(argp->xdr, &exid->flags) < 0)
1593 return nfserr_bad_xdr;
1594 status = nfsd4_decode_state_protect4_a(argp, exid);
1595 if (status)
1596 return status;
10ff8422 1597 return nfsd4_decode_nfs_impl_id4(argp, exid);
2db134eb
AA		 1598}
1599
3a3f1fba
CL		 1600static __be32
1601nfsd4_decode_channel_attrs4(struct nfsd4_compoundargs *argp,
1602 struct nfsd4_channel_attrs *ca)
1603{
1604 __be32 *p;
1605
1606 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 7);
1607 if (!p)
1608 return nfserr_bad_xdr;
1609
1610 /* headerpadsz is ignored */
1611 p++;
1612 ca->maxreq_sz = be32_to_cpup(p++);
1613 ca->maxresp_sz = be32_to_cpup(p++);
1614 ca->maxresp_cached = be32_to_cpup(p++);
1615 ca->maxops = be32_to_cpup(p++);
1616 ca->maxreqs = be32_to_cpup(p++);
1617 ca->nr_rdma_attrs = be32_to_cpup(p);
1618 switch (ca->nr_rdma_attrs) {
1619 case 0:
1620 break;
1621 case 1:
1622 if (xdr_stream_decode_u32(argp->xdr, &ca->rdma_attrs) < 0)
1623 return nfserr_bad_xdr;
1624 break;
1625 default:
1626 return nfserr_bad_xdr;
1627 }
1628
1629 return nfs_ok;
1630}
1631
2db134eb
AA		 1632static __be32
1633nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1634 struct nfsd4_create_session *sess)
1635{
81243e3f 1636 __be32 status;
ec6b5d7b 1637
81243e3f
CL		 1638 status = nfsd4_decode_clientid4(argp, &sess->clientid);
1639 if (status)
1640 return status;
1641 if (xdr_stream_decode_u32(argp->xdr, &sess->seqid) < 0)
1642 return nfserr_bad_xdr;
1643 if (xdr_stream_decode_u32(argp->xdr, &sess->flags) < 0)
1644 return nfserr_bad_xdr;
3a3f1fba
CL		 1645 status = nfsd4_decode_channel_attrs4(argp, &sess->fore_channel);
1646 if (status)
1647 return status;
1648 status = nfsd4_decode_channel_attrs4(argp, &sess->back_channel);
81243e3f
CL		 1649 if (status)
1650 return status;
1651 if (xdr_stream_decode_u32(argp->xdr, &sess->callback_prog) < 0)
1652 return nfserr_bad_xdr;
1653 status = nfsd4_decode_cb_sec(argp, &sess->cb_sec);
3a3f1fba
CL		 1654 if (status)
1655 return status;
ec6b5d7b 1656
81243e3f 1657 return nfs_ok;
2db134eb
AA		 1658}
1659
1660static __be32
1661nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1662 struct nfsd4_destroy_session *destroy_session)
1663{
94e254af 1664 return nfsd4_decode_sessionid4(argp, &destroy_session->sessionid);
2db134eb
AA		 1665}
1666
e1ca12df
BS		 1667static __be32
1668nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1669 struct nfsd4_free_stateid *free_stateid)
1670{
aec387d5 1671 return nfsd4_decode_stateid4(argp, &free_stateid->fr_stateid);
e1ca12df
BS		 1672}
1673
9cf514cc
CH		 1674#ifdef CONFIG_NFSD_PNFS
1675static __be32
1676nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1677 struct nfsd4_getdeviceinfo *gdev)
1678{
04495971
CL		 1679 __be32 status;
1680
1681 status = nfsd4_decode_deviceid4(argp, &gdev->gd_devid);
1682 if (status)
1683 return status;
1684 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_layout_type) < 0)
1685 return nfserr_bad_xdr;
1686 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_maxcount) < 0)
1687 return nfserr_bad_xdr;
1688 if (xdr_stream_decode_uint32_array(argp->xdr,
1689 &gdev->gd_notify_types, 1) < 0)
1690 return nfserr_bad_xdr;
1691
1692 return nfs_ok;
9cf514cc
CH		 1693}
1694
5185980d
CL		 1695static __be32
1696nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1697 struct nfsd4_layoutcommit *lcp)
1698{
1699 __be32 *p, status;
1700
1701 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.offset) < 0)
1702 return nfserr_bad_xdr;
1703 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.length) < 0)
1704 return nfserr_bad_xdr;
1705 if (xdr_stream_decode_bool(argp->xdr, &lcp->lc_reclaim) < 0)
1706 return nfserr_bad_xdr;
1707 status = nfsd4_decode_stateid4(argp, &lcp->lc_sid);
1708 if (status)
1709 return status;
1710 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_newoffset) < 0)
1711 return nfserr_bad_xdr;
1712 if (lcp->lc_newoffset) {
1713 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_last_wr) < 0)
1714 return nfserr_bad_xdr;
1715 } else
1716 lcp->lc_last_wr = 0;
1717 p = xdr_inline_decode(argp->xdr, XDR_UNIT);
1718 if (!p)
1719 return nfserr_bad_xdr;
1720 if (xdr_item_is_present(p)) {
1721 status = nfsd4_decode_nfstime4(argp, &lcp->lc_mtime);
1722 if (status)
1723 return status;
1724 } else {
1725 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1726 }
1727 return nfsd4_decode_layoutupdate4(argp, lcp);
1728}
1729
9cf514cc
CH		 1730static __be32
1731nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1732 struct nfsd4_layoutget *lgp)
1733{
c8e88e3a 1734 __be32 status;
db59c0ef 1735
c8e88e3a
CL		 1736 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_signal) < 0)
1737 return nfserr_bad_xdr;
1738 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_layout_type) < 0)
1739 return nfserr_bad_xdr;
1740 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_seg.iomode) < 0)
1741 return nfserr_bad_xdr;
1742 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.offset) < 0)
1743 return nfserr_bad_xdr;
1744 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.length) < 0)
1745 return nfserr_bad_xdr;
1746 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_minlength) < 0)
1747 return nfserr_bad_xdr;
1748 status = nfsd4_decode_stateid4(argp, &lgp->lg_sid);
db59c0ef
KM		 1749 if (status)
1750 return status;
c8e88e3a
CL		 1751 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_maxcount) < 0)
1752 return nfserr_bad_xdr;
db59c0ef 1753
c8e88e3a 1754 return nfs_ok;
9cf514cc
CH		 1755}
1756
9cf514cc
CH		 1757static __be32
1758nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1759 struct nfsd4_layoutreturn *lrp)
1760{
645fcad3
CL		 1761 if (xdr_stream_decode_bool(argp->xdr, &lrp->lr_reclaim) < 0)
1762 return nfserr_bad_xdr;
1763 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_layout_type) < 0)
1764 return nfserr_bad_xdr;
1765 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_seg.iomode) < 0)
1766 return nfserr_bad_xdr;
1767 return nfsd4_decode_layoutreturn4(argp, lrp);
9cf514cc
CH		 1768}
1769#endif /* CONFIG_NFSD_PNFS */
1770
53d70873
CL		 1771static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1772 struct nfsd4_secinfo_no_name *sin)
1773{
1774 if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0)
1775 return nfserr_bad_xdr;
1776 return nfs_ok;
1777}
1778
cf907b11
CL		 1779static __be32
1780nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1781 struct nfsd4_sequence *seq)
1782{
1783 __be32 *p, status;
1784
1785 status = nfsd4_decode_sessionid4(argp, &seq->sessionid);
1786 if (status)
1787 return status;
1788 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 4);
1789 if (!p)
1790 return nfserr_bad_xdr;
1791 seq->seqid = be32_to_cpup(p++);
1792 seq->slotid = be32_to_cpup(p++);
1793 seq->maxslots = be32_to_cpup(p++);
1794 seq->cachethis = be32_to_cpup(p);
1795
1796 return nfs_ok;
1797}
1798
b7a0c8f6
CL		 1799static __be32
1800nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1801{
1802 struct nfsd4_test_stateid_id *stateid;
1803 __be32 status;
1804 u32 i;
1805
1806 if (xdr_stream_decode_u32(argp->xdr, &test_stateid->ts_num_ids) < 0)
1807 return nfserr_bad_xdr;
1808
1809 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1810 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1811 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1812 if (!stateid)
bb4d8427 1813 return nfserr_jukebox;
b7a0c8f6
CL		 1814 INIT_LIST_HEAD(&stateid->ts_id_list);
1815 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1816 status = nfsd4_decode_stateid4(argp, &stateid->ts_id_stateid);
1817 if (status)
1818 return status;
1819 }
1820
1821 return nfs_ok;
1822}
1823
c95f2ec3
CL		 1824static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp,
1825 struct nfsd4_destroy_clientid *dc)
1826{
1827 return nfsd4_decode_clientid4(argp, &dc->clientid);
1828}
1829
0d646784
CL		 1830static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp,
1831 struct nfsd4_reclaim_complete *rc)
1832{
1833 if (xdr_stream_decode_bool(argp->xdr, &rc->rca_one_fs) < 0)
1834 return nfserr_bad_xdr;
1835 return nfs_ok;
1836}
1837
95d871f0
AS		 1838static __be32
1839nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1840 struct nfsd4_fallocate *fallocate)
1841{
6aef27aa 1842 __be32 status;
95d871f0 1843
6aef27aa 1844 status = nfsd4_decode_stateid4(argp, &fallocate->falloc_stateid);
95d871f0
AS		 1845 if (status)
1846 return status;
6aef27aa
CL		 1847 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_offset) < 0)
1848 return nfserr_bad_xdr;
1849 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_length) < 0)
1850 return nfserr_bad_xdr;
95d871f0 1851
6aef27aa 1852 return nfs_ok;
95d871f0
AS		 1853}
1854
84e1b21d
OK		 1855static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
1856 struct nl4_server *ns)
1857{
84e1b21d 1858 struct nfs42_netaddr *naddr;
f49e4b4d 1859 __be32 *p;
84e1b21d 1860
f49e4b4d
CL		 1861 if (xdr_stream_decode_u32(argp->xdr, &ns->nl4_type) < 0)
1862 return nfserr_bad_xdr;
84e1b21d
OK		 1863
1864 /* currently support for 1 inter-server source server */
1865 switch (ns->nl4_type) {
1866 case NL4_NETADDR:
1867 naddr = &ns->u.nl4_addr;
1868
f49e4b4d
CL		 1869 if (xdr_stream_decode_u32(argp->xdr, &naddr->netid_len) < 0)
1870 return nfserr_bad_xdr;
84e1b21d 1871 if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
f49e4b4d 1872 return nfserr_bad_xdr;
84e1b21d 1873
f49e4b4d
CL		 1874 p = xdr_inline_decode(argp->xdr, naddr->netid_len);
1875 if (!p)
1876 return nfserr_bad_xdr;
1877 memcpy(naddr->netid, p, naddr->netid_len);
84e1b21d 1878
f49e4b4d
CL		 1879 if (xdr_stream_decode_u32(argp->xdr, &naddr->addr_len) < 0)
1880 return nfserr_bad_xdr;
84e1b21d 1881 if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
f49e4b4d 1882 return nfserr_bad_xdr;
84e1b21d 1883
f49e4b4d
CL		 1884 p = xdr_inline_decode(argp->xdr, naddr->addr_len);
1885 if (!p)
1886 return nfserr_bad_xdr;
1887 memcpy(naddr->addr, p, naddr->addr_len);
84e1b21d
OK		 1888 break;
1889 default:
f49e4b4d 1890 return nfserr_bad_xdr;
84e1b21d 1891 }
f49e4b4d
CL		 1892
1893 return nfs_ok;
84e1b21d
OK		 1894}
1895
29ae7f9d
AS		 1896static __be32
1897nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1898{
1913cdf5 1899 u32 consecutive, i, count, sync;
84e1b21d 1900 struct nl4_server *ns_dummy;
e8febea7 1901 __be32 status;
29ae7f9d 1902
e8febea7 1903 status = nfsd4_decode_stateid4(argp, &copy->cp_src_stateid);
29ae7f9d
AS		 1904 if (status)
1905 return status;
e8febea7 1906 status = nfsd4_decode_stateid4(argp, &copy->cp_dst_stateid);
29ae7f9d
AS		 1907 if (status)
1908 return status;
e8febea7
CL		 1909 if (xdr_stream_decode_u64(argp->xdr, &copy->cp_src_pos) < 0)
1910 return nfserr_bad_xdr;
1911 if (xdr_stream_decode_u64(argp->xdr, &copy->cp_dst_pos) < 0)
1912 return nfserr_bad_xdr;
1913 if (xdr_stream_decode_u64(argp->xdr, &copy->cp_count) < 0)
1914 return nfserr_bad_xdr;
1915 /* ca_consecutive: we always do consecutive copies */
1916 if (xdr_stream_decode_u32(argp->xdr, &consecutive) < 0)
1917 return nfserr_bad_xdr;
1913cdf5 1918 if (xdr_stream_decode_bool(argp->xdr, &sync) < 0)
e8febea7 1919 return nfserr_bad_xdr;
1913cdf5 1920 nfsd4_copy_set_sync(copy, sync);
29ae7f9d 1921
e8febea7
CL		 1922 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1923 return nfserr_bad_xdr;
87689df6
CL		 1924 copy->cp_src = svcxdr_tmpalloc(argp, sizeof(*copy->cp_src));
1925 if (copy->cp_src == NULL)
1926 return nfserr_jukebox;
84e1b21d 1927 if (count == 0) { /* intra-server copy */
1913cdf5 1928 __set_bit(NFSD4_COPY_F_INTRA, &copy->cp_flags);
e8febea7 1929 return nfs_ok;
84e1b21d
OK		 1930 }
1931
e8febea7 1932 /* decode all the supplied server addresses but use only the first */
87689df6 1933 status = nfsd4_decode_nl4_server(argp, copy->cp_src);
84e1b21d
OK		 1934 if (status)
1935 return status;
1936
1937 ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
1938 if (ns_dummy == NULL)
bb4d8427 1939 return nfserr_jukebox;
84e1b21d
OK		 1940 for (i = 0; i < count - 1; i++) {
1941 status = nfsd4_decode_nl4_server(argp, ns_dummy);
1942 if (status) {
1943 kfree(ns_dummy);
1944 return status;
1945 }
1946 }
1947 kfree(ns_dummy);
29ae7f9d 1948
e8febea7 1949 return nfs_ok;
29ae7f9d
AS		 1950}
1951
51911868
OK		 1952static __be32
1953nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
1954 struct nfsd4_copy_notify *cn)
1955{
5aff7d08 1956 __be32 status;
51911868 1957
09426ef2
CL		 1958 cn->cpn_src = svcxdr_tmpalloc(argp, sizeof(*cn->cpn_src));
1959 if (cn->cpn_src == NULL)
1960 return nfserr_jukebox;
1961 cn->cpn_dst = svcxdr_tmpalloc(argp, sizeof(*cn->cpn_dst));
1962 if (cn->cpn_dst == NULL)
1963 return nfserr_jukebox;
1964
f9a953fb 1965 status = nfsd4_decode_stateid4(argp, &cn->cpn_src_stateid);
51911868
OK		 1966 if (status)
1967 return status;
09426ef2 1968 return nfsd4_decode_nl4_server(argp, cn->cpn_dst);
51911868
OK		 1969}
1970
f9a953fb
CL		 1971static __be32
1972nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
1973 struct nfsd4_offload_status *os)
1974{
2846bb05 1975 return nfsd4_decode_stateid4(argp, &os->stateid);
f9a953fb
CL		 1976}
1977
24bab491
AS		 1978static __be32
1979nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1980{
9d32b412 1981 __be32 status;
24bab491 1982
9d32b412 1983 status = nfsd4_decode_stateid4(argp, &seek->seek_stateid);
24bab491
AS		 1984 if (status)
1985 return status;
9d32b412
CL		 1986 if (xdr_stream_decode_u64(argp->xdr, &seek->seek_offset) < 0)
1987 return nfserr_bad_xdr;
1988 if (xdr_stream_decode_u32(argp->xdr, &seek->seek_whence) < 0)
1989 return nfserr_bad_xdr;
24bab491 1990
9d32b412 1991 return nfs_ok;
24bab491
AS		 1992}
1993
3dfd0b0e
CL		 1994static __be32
1995nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1996{
1997 __be32 status;
1998
1999 status = nfsd4_decode_stateid4(argp, &clone->cl_src_stateid);
2000 if (status)
2001 return status;
2002 status = nfsd4_decode_stateid4(argp, &clone->cl_dst_stateid);
2003 if (status)
2004 return status;
2005 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_src_pos) < 0)
2006 return nfserr_bad_xdr;
2007 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_dst_pos) < 0)
2008 return nfserr_bad_xdr;
2009 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_count) < 0)
2010 return nfserr_bad_xdr;
2011
2012 return nfs_ok;
2013}
2014
23e50fe3
FL		 2015/*
2016 * XDR data that is more than PAGE_SIZE in size is normally part of a
2017 * read or write. However, the size of extended attributes is limited
2018 * by the maximum request size, and then further limited by the underlying
2019 * filesystem limits. This can exceed PAGE_SIZE (currently, XATTR_SIZE_MAX
2020 * is 64k). Since there is no kvec- or page-based interface to xattrs,
2021 * and we're not dealing with contiguous pages, we need to do some copying.
2022 */
2023
2024/*
c1346a12 2025 * Decode data into buffer.
23e50fe3
FL		 2026 */
2027static __be32
c1346a12
CL		 2028nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct xdr_buf *xdr,
2029 char **bufp, u32 buflen)
23e50fe3 2030{
c1346a12
CL		 2031 struct page **pages = xdr->pages;
2032 struct kvec *head = xdr->head;
23e50fe3
FL		 2033 char *tmp, *dp;
2034 u32 len;
2035
2036 if (buflen <= head->iov_len) {
2037 /*
2038 * We're in luck, the head has enough space. Just return
2039 * the head, no need for copying.
2040 */
2041 *bufp = head->iov_base;
2042 return 0;
2043 }
2044
2045 tmp = svcxdr_tmpalloc(argp, buflen);
2046 if (tmp == NULL)
2047 return nfserr_jukebox;
2048
2049 dp = tmp;
2050 memcpy(dp, head->iov_base, head->iov_len);
2051 buflen -= head->iov_len;
2052 dp += head->iov_len;
2053
2054 while (buflen > 0) {
2055 len = min_t(u32, buflen, PAGE_SIZE);
2056 memcpy(dp, page_address(*pages), len);
2057
2058 buflen -= len;
2059 dp += len;
2060 pages++;
2061 }
2062
2063 *bufp = tmp;
2064 return 0;
2065}
2066
2067/*
2068 * Get a user extended attribute name from the XDR buffer.
2069 * It will not have the "user." prefix, so prepend it.
2070 * Lastly, check for nul characters in the name.
2071 */
2072static __be32
2073nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep)
2074{
23e50fe3
FL		 2075 char *name, *sp, *dp;
2076 u32 namelen, cnt;
830c7150 2077 __be32 *p;
23e50fe3 2078
830c7150
CL		 2079 if (xdr_stream_decode_u32(argp->xdr, &namelen) < 0)
2080 return nfserr_bad_xdr;
23e50fe3
FL		 2081 if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN))
2082 return nfserr_nametoolong;
23e50fe3 2083 if (namelen == 0)
830c7150
CL		 2084 return nfserr_bad_xdr;
2085 p = xdr_inline_decode(argp->xdr, namelen);
2086 if (!p)
2087 return nfserr_bad_xdr;
23e50fe3
FL		 2088 name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1);
2089 if (!name)
2090 return nfserr_jukebox;
23e50fe3
FL		 2091 memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2092
2093 /*
2094 * Copy the extended attribute name over while checking for 0
2095 * characters.
2096 */
2097 sp = (char *)p;
2098 dp = name + XATTR_USER_PREFIX_LEN;
2099 cnt = namelen;
2100
2101 while (cnt-- > 0) {
2102 if (*sp == '\0')
830c7150 2103 return nfserr_bad_xdr;
23e50fe3
FL		 2104 *dp++ = *sp++;
2105 }
2106 *dp = '\0';
2107
2108 *namep = name;
2109
830c7150 2110 return nfs_ok;
23e50fe3
FL		 2111}
2112
2113/*
2114 * A GETXATTR op request comes without a length specifier. We just set the
2115 * maximum length for the reply based on XATTR_SIZE_MAX and the maximum
2116 * channel reply size. nfsd_getxattr will probe the length of the xattr,
2117 * check it against getxa_len, and allocate + return the value.
2118 */
2119static __be32
2120nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp,
2121 struct nfsd4_getxattr *getxattr)
2122{
2123 __be32 status;
2124 u32 maxcount;
2125
2126 status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name);
2127 if (status)
2128 return status;
2129
2130 maxcount = svc_max_payload(argp->rqstp);
2131 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2132
2133 getxattr->getxa_len = maxcount;
2134
2135 return status;
2136}
2137
2138static __be32
2139nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp,
2140 struct nfsd4_setxattr *setxattr)
2141{
23e50fe3 2142 u32 flags, maxcount, size;
403366a7 2143 __be32 status;
23e50fe3 2144
403366a7
CL		 2145 if (xdr_stream_decode_u32(argp->xdr, &flags) < 0)
2146 return nfserr_bad_xdr;
23e50fe3
FL		 2147
2148 if (flags > SETXATTR4_REPLACE)
2149 return nfserr_inval;
2150 setxattr->setxa_flags = flags;
2151
2152 status = nfsd4_decode_xattr_name(argp, &setxattr->setxa_name);
2153 if (status)
2154 return status;
2155
2156 maxcount = svc_max_payload(argp->rqstp);
2157 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2158
403366a7
CL		 2159 if (xdr_stream_decode_u32(argp->xdr, &size) < 0)
2160 return nfserr_bad_xdr;
23e50fe3
FL		 2161 if (size > maxcount)
2162 return nfserr_xattr2big;
2163
2164 setxattr->setxa_len = size;
2165 if (size > 0) {
c1346a12 2166 struct xdr_buf payload;
23e50fe3 2167
c1346a12 2168 if (!xdr_stream_subsegment(argp->xdr, &payload, size))
403366a7 2169 return nfserr_bad_xdr;
c1346a12
CL		 2170 status = nfsd4_vbuf_from_vector(argp, &payload,
2171 &setxattr->setxa_buf, size);
23e50fe3
FL		 2172 }
2173
403366a7 2174 return nfs_ok;
23e50fe3
FL		 2175}
2176
2177static __be32
2178nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp,
2179 struct nfsd4_listxattrs *listxattrs)
2180{
23e50fe3
FL		 2181 u32 maxcount;
2182
2212036c
CL		 2183 if (xdr_stream_decode_u64(argp->xdr, &listxattrs->lsxa_cookie) < 0)
2184 return nfserr_bad_xdr;
23e50fe3
FL		 2185
2186 /*
2187 * If the cookie is too large to have even one user.x attribute
2188 * plus trailing '\0' left in a maximum size buffer, it's invalid.
2189 */
2190 if (listxattrs->lsxa_cookie >=
2191 (XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2)))
2192 return nfserr_badcookie;
2193
2212036c
CL		 2194 if (xdr_stream_decode_u32(argp->xdr, &maxcount) < 0)
2195 return nfserr_bad_xdr;
23e50fe3
FL		 2196 if (maxcount < 8)
2197 /* Always need at least 2 words (length and one character) */
2198 return nfserr_inval;
2199
2200 maxcount = min(maxcount, svc_max_payload(argp->rqstp));
2201 listxattrs->lsxa_maxcount = maxcount;
2202
2212036c 2203 return nfs_ok;
23e50fe3
FL		 2204}
2205
2206static __be32
2207nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp,
2208 struct nfsd4_removexattr *removexattr)
2209{
2210 return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name);
2211}
2212
347e0ad9
BH		 2213static __be32
2214nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
2215{
2216 return nfs_ok;
2217}
2218
3c375c6f
BH		 2219static __be32
2220nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
2221{
1e685ec2 2222 return nfserr_notsupp;
3c375c6f
BH		 2223}
2224
347e0ad9
BH		 2225typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
2226
c1df609d 2227static const nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 2228 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
2229 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
2230 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
2231 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
2232 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
2233 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
2234 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
2235 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
2236 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
2237 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
2238 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
2239 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
2240 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
2241 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
2242 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2243 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
2244 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
2245 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
2246 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
2247 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 2248 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 2249 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
2250 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
2251 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
2252 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
2253 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
2254 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
2255 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
2256 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
2257 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
2258 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
2259 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
2260 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
2261 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
2262 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2263 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
2264 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 2265
2266 /* new operations for NFSv4.1 */
cb73a9f4 2267 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 2268 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 2269 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
2270 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
2271 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 2272 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae 2273 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc
CH		 2274#ifdef CONFIG_NFSD_PNFS
2275 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
2276 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2277 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
2278 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
2279 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
2280#else
9064caae
RD		 2281 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
2282 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2283 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
2284 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
2285 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc 2286#endif
04f4ad16 2287 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 2288 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
2289 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 2290 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 2291 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 2292 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 2293 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
87a15a80
AS		 2294
2295 /* new operations for NFSv4.2 */
95d871f0 2296 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
29ae7f9d 2297 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
51911868 2298 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_copy_notify,
b0cb9085 2299 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
87a15a80
AS		 2300 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
2301 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
2302 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
885e2bf3 2303 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status,
6308bc98 2304 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status,
528b8493 2305 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_read,
24bab491 2306 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
87a15a80 2307 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
ffa0160a 2308 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
23e50fe3
FL		 2309 /* RFC 8276 extended atributes operations */
2310 [OP_GETXATTR] = (nfsd4_dec)nfsd4_decode_getxattr,
2311 [OP_SETXATTR] = (nfsd4_dec)nfsd4_decode_setxattr,
2312 [OP_LISTXATTRS] = (nfsd4_dec)nfsd4_decode_listxattrs,
2313 [OP_REMOVEXATTR] = (nfsd4_dec)nfsd4_decode_removexattr,
2db134eb
AA		 2314};
2315
e1a90ebd
AS		 2316static inline bool
2317nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
2318{
8217d146 2319 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 2320 return false;
8217d146 2321 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 2322 return false;
8217d146
AS		 2323 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
2324 return false;
2325 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 2326 return false;
2327 return true;
2328}
f2feb96b 2329
c44b31c2 2330static bool
1da177e4
LT		 2331nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
2332{
1da177e4 2333 struct nfsd4_op *op;
1091006c 2334 bool cachethis = false;
a5cddc88
BF		 2335 int auth_slack= argp->rqstp->rq_auth_slack;
2336 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 2337 int readcount = 0;
2338 int readbytes = 0;
d9b74bda 2339 __be32 *p;
1da177e4
LT		 2340 int i;
2341
d9b74bda 2342 if (xdr_stream_decode_u32(argp->xdr, &argp->taglen) < 0)
c44b31c2 2343 return false;
d9b74bda
CL		 2344 max_reply += XDR_UNIT;
2345 argp->tag = NULL;
2346 if (unlikely(argp->taglen)) {
2347 if (argp->taglen > NFSD4_MAX_TAGLEN)
c44b31c2 2348 return false;
d9b74bda
CL		 2349 p = xdr_inline_decode(argp->xdr, argp->taglen);
2350 if (!p)
c44b31c2 2351 return false;
7b723008 2352 argp->tag = svcxdr_savemem(argp, p, argp->taglen);
d9b74bda 2353 if (!argp->tag)
c44b31c2 2354 return false;
d9b74bda
CL		 2355 max_reply += xdr_align_size(argp->taglen);
2356 }
2357
2358 if (xdr_stream_decode_u32(argp->xdr, &argp->minorversion) < 0)
c44b31c2 2359 return false;
d9b74bda 2360 if (xdr_stream_decode_u32(argp->xdr, &argp->opcnt) < 0)
c44b31c2 2361 return false;
d9b74bda 2362
0078117c
BF		 2363 /*
2364 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
2365 * here, so we return success at the xdr level so that
2366 * nfsd4_proc can handle this is an NFS-level error.
2367 */
2368 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
c44b31c2 2369 return true;
1da177e4 2370
e8c96f8c 2371 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
5d6031ca 2372 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1da177e4
LT		 2373 if (!argp->ops) {
2374 argp->ops = argp->iops;
817cb9d4 2375 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
c44b31c2 2376 return false;
1da177e4
LT		 2377 }
2378 }
2379
e1a90ebd 2380 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 2381 argp->opcnt = 0;
2382
1da177e4
LT		 2383 for (i = 0; i < argp->opcnt; i++) {
2384 op = &argp->ops[i];
2385 op->replay = NULL;
2386
3a237b4a 2387 if (xdr_stream_decode_u32(argp->xdr, &op->opnum) < 0)
c44b31c2 2388 return false;
08281341 2389 if (nfsd4_opnum_in_range(argp, op)) {
e1a90ebd 2390 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
08281341
CL		 2391 if (op->status != nfs_ok)
2392 trace_nfsd_compound_decode_err(argp->rqstp,
2393 argp->opcnt, i,
2394 op->opnum,
2395 op->status);
2396 } else {
1da177e4
LT		 2397 op->opnum = OP_ILLEGAL;
2398 op->status = nfserr_op_illegal;
1da177e4 2399 }
f4f9ef4a 2400 op->opdesc = OPDESC(op);
1091006c
BF		 2401 /*
2402 * We'll try to cache the result in the DRC if any one
2403 * op in the compound wants to be cached:
2404 */
2405 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 2406
528b8493 2407 if (op->opnum == OP_READ || op->opnum == OP_READ_PLUS) {
b0e35fda
BF		 2408 readcount++;
2409 readbytes += nfsd4_max_reply(argp->rqstp, op);
2410 } else
2411 max_reply += nfsd4_max_reply(argp->rqstp, op);
f7b43d0c 2412 /*
7323f0d2
KM		 2413 * OP_LOCK and OP_LOCKT may return a conflicting lock.
2414 * (Special case because it will just skip encoding this
2415 * if it runs out of xdr buffer space, and it is the only
2416 * operation that behaves this way.)
f7b43d0c 2417 */
7323f0d2 2418 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
f7b43d0c 2419 max_reply += NFS4_OPAQUE_LIMIT;
e372ba60
BF		 2420
2421 if (op->status) {
2422 argp->opcnt = i+1;
2423 break;
2424 }
1da177e4 2425 }
1091006c
BF		 2426 /* Sessions make the DRC unnecessary: */
2427 if (argp->minorversion)
2428 cachethis = false;
b0e35fda 2429 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 2430 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 2431
a5cddc88 2432 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
28df0988 2433 __clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
b0e35fda 2434
c44b31c2 2435 return true;
1da177e4 2436}
1da177e4 2437
b8800921
N		 2438static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
2439 struct svc_export *exp)
c654b8a9 2440{
b8800921
N		 2441 if (exp->ex_flags & NFSEXP_V4ROOT) {
2442 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
2443 *p++ = 0;
70b87f77 2444 } else
39ca1bf6 2445 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
d05d5744 2446 return p;
c654b8a9
BF		 2447}
2448
16945141
BF		 2449/*
2450 * ctime (in NFSv4, time_metadata) is not writeable, and the client
2451 * doesn't really care what resolution could theoretically be stored by
2452 * the filesystem.
2453 *
2454 * The client cares how close together changes can be while still
2455 * guaranteeing ctime changes. For most filesystems (which have
2456 * timestamps with nanosecond fields) that is limited by the resolution
2457 * of the time returned from current_time() (which I'm assuming to be
2458 * 1/HZ).
2459 */
2460static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
2461{
e4598e38 2462 struct timespec64 ts;
16945141
BF		 2463 u32 ns;
2464
2465 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
e4598e38 2466 ts = ns_to_timespec64(ns);
16945141
BF		 2467
2468 p = xdr_encode_hyper(p, ts.tv_sec);
2469 *p++ = cpu_to_be32(ts.tv_nsec);
2470
2471 return p;
2472}
2473
d05d5744 2474static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 2475{
d05d5744 2476 *p++ = cpu_to_be32(c->atomic);
b2140338
BF		 2477 p = xdr_encode_hyper(p, c->before_change);
2478 p = xdr_encode_hyper(p, c->after_change);
d05d5744 2479 return p;
c654b8a9 2480}
1da177e4 2481
81c3f413 2482/* Encode as an array of strings the string given with components
e7a0444a 2483 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 2484 */
ddd1ea56
BF		 2485static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2486 char *components, char esc_enter,
2487 char esc_exit)
81c3f413 2488{
ddd1ea56 2489 __be32 *p;
082d4bd7
BF		 2490 __be32 pathlen;
2491 int pathlen_offset;
81c3f413 2492 int strlen, count=0;
e7a0444a 2493 char *str, *end, *next;
81c3f413
BF		 2494
2495 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 2496
2497 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 2498 p = xdr_reserve_space(xdr, 4);
2499 if (!p)
81c3f413 2500 return nfserr_resource;
082d4bd7
BF		 2501 p++; /* We will fill this in with @count later */
2502
81c3f413
BF		 2503 end = str = components;
2504 while (*end) {
e7a0444a
WAA		 2505 bool found_esc = false;
2506
2507 /* try to parse as esc_start, ..., esc_end, sep */
2508 if (*str == esc_enter) {
2509 for (; *end && (*end != esc_exit); end++)
2510 /* find esc_exit or end of string */;
2511 next = end + 1;
2512 if (*end && (!*next || *next == sep)) {
2513 str++;
2514 found_esc = true;
2515 }
2516 }
2517
2518 if (!found_esc)
2519 for (; *end && (*end != sep); end++)
2520 /* find sep or end of string */;
2521
81c3f413
BF		 2522 strlen = end - str;
2523 if (strlen) {
ddd1ea56
BF		 2524 p = xdr_reserve_space(xdr, strlen + 4);
2525 if (!p)
81c3f413 2526 return nfserr_resource;
0c0c267b 2527 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 2528 count++;
2529 }
2530 else
2531 end++;
5a64e569
BC		 2532 if (found_esc)
2533 end = next;
2534
81c3f413
BF		 2535 str = end;
2536 }
bf7491f1 2537 pathlen = htonl(count);
082d4bd7 2538 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 2539 return 0;
2540}
2541
e7a0444a
WAA		 2542/* Encode as an array of strings the string given with components
2543 * separated @sep.
2544 */
ddd1ea56
BF		 2545static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2546 char *components)
e7a0444a 2547{
ddd1ea56 2548 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 2549}
2550
81c3f413
BF		 2551/*
2552 * encode a location element of a fs_locations structure
2553 */
ddd1ea56
BF		 2554static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2555 struct nfsd4_fs_location *location)
81c3f413 2556{
b37ad28b 2557 __be32 status;
81c3f413 2558
ddd1ea56 2559 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 2560 '[', ']');
81c3f413
BF		 2561 if (status)
2562 return status;
ddd1ea56 2563 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 2564 if (status)
2565 return status;
81c3f413
BF		 2566 return 0;
2567}
2568
2569/*
ed748aac 2570 * Encode a path in RFC3530 'pathname4' format
81c3f413 2571 */
ddd1ea56
BF		 2572static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2573 const struct path *root,
2574 const struct path *path)
81c3f413 2575{
301f0268 2576 struct path cur = *path;
ddd1ea56 2577 __be32 *p;
ed748aac
TM		 2578 struct dentry **components = NULL;
2579 unsigned int ncomponents = 0;
2580 __be32 err = nfserr_jukebox;
81c3f413 2581
ed748aac 2582 dprintk("nfsd4_encode_components(");
81c3f413 2583
ed748aac
TM		 2584 path_get(&cur);
2585 /* First walk the path up to the nfsd root, and store the
2586 * dentries/path components in an array.
2587 */
2588 for (;;) {
b77a4b2e 2589 if (path_equal(&cur, root))
ed748aac
TM		 2590 break;
2591 if (cur.dentry == cur.mnt->mnt_root) {
2592 if (follow_up(&cur))
2593 continue;
2594 goto out_free;
2595 }
2596 if ((ncomponents & 15) == 0) {
2597 struct dentry **new;
2598 new = krealloc(components,
2599 sizeof(*new) * (ncomponents + 16),
2600 GFP_KERNEL);
2601 if (!new)
2602 goto out_free;
2603 components = new;
2604 }
2605 components[ncomponents++] = cur.dentry;
2606 cur.dentry = dget_parent(cur.dentry);
2607 }
ddd1ea56
BF		 2608 err = nfserr_resource;
2609 p = xdr_reserve_space(xdr, 4);
2610 if (!p)
ed748aac 2611 goto out_free;
c373b0a4 2612 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 2613
2614 while (ncomponents) {
2615 struct dentry *dentry = components[ncomponents - 1];
301f0268 2616 unsigned int len;
ed748aac 2617
301f0268
AV		 2618 spin_lock(&dentry->d_lock);
2619 len = dentry->d_name.len;
ddd1ea56
BF		 2620 p = xdr_reserve_space(xdr, len + 4);
2621 if (!p) {
301f0268 2622 spin_unlock(&dentry->d_lock);
ed748aac 2623 goto out_free;
301f0268 2624 }
0c0c267b 2625 p = xdr_encode_opaque(p, dentry->d_name.name, len);
a455589f 2626 dprintk("/%pd", dentry);
301f0268 2627 spin_unlock(&dentry->d_lock);
ed748aac
TM		 2628 dput(dentry);
2629 ncomponents--;
81c3f413 2630 }
ed748aac 2631
ed748aac
TM		 2632 err = 0;
2633out_free:
2634 dprintk(")\n");
2635 while (ncomponents)
2636 dput(components[--ncomponents]);
2637 kfree(components);
2638 path_put(&cur);
2639 return err;
2640}
2641
ddd1ea56
BF		 2642static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2643 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 2644{
2645 struct svc_export *exp_ps;
2646 __be32 res;
2647
2648 exp_ps = rqst_find_fsidzero_export(rqstp);
2649 if (IS_ERR(exp_ps))
2650 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 2651 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 2652 exp_put(exp_ps);
2653 return res;
81c3f413
BF		 2654}
2655
2656/*
2657 * encode a fs_locations structure
2658 */
ddd1ea56
BF		 2659static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2660 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 2661{
b37ad28b 2662 __be32 status;
cc45f017 2663 int i;
ddd1ea56 2664 __be32 *p;
81c3f413 2665 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 2666
ddd1ea56 2667 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 2668 if (status)
2669 return status;
ddd1ea56
BF		 2670 p = xdr_reserve_space(xdr, 4);
2671 if (!p)
81c3f413 2672 return nfserr_resource;
c373b0a4 2673 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 2674 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 2675 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 2676 if (status)
2677 return status;
2678 }
81c3f413
BF		 2679 return 0;
2680}
1da177e4 2681
3d2544b1
BF		 2682static u32 nfs4_file_type(umode_t mode)
2683{
2684 switch (mode & S_IFMT) {
2685 case S_IFIFO: return NF4FIFO;
2686 case S_IFCHR: return NF4CHR;
2687 case S_IFDIR: return NF4DIR;
2688 case S_IFBLK: return NF4BLK;
2689 case S_IFLNK: return NF4LNK;
2690 case S_IFREG: return NF4REG;
2691 case S_IFSOCK: return NF4SOCK;
2692 default: return NF4BAD;
25fef48b 2693 }
3d2544b1 2694}
1da177e4 2695
b37ad28b 2696static inline __be32
ddd1ea56
BF		 2697nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2698 struct nfs4_ace *ace)
1da177e4 2699{
3554116d 2700 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 2701 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 2702 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 2703 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 2704 else
ddd1ea56 2705 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 2706}
2707
6896f15a 2708static inline __be32
8a4c3926 2709nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
6896f15a 2710{
8a4c3926
JL		 2711 __be32 *p;
2712 unsigned long i = hweight_long(layout_types);
6896f15a 2713
8a4c3926
JL		 2714 p = xdr_reserve_space(xdr, 4 + 4 * i);
2715 if (!p)
2716 return nfserr_resource;
2717
2718 *p++ = cpu_to_be32(i);
2719
2720 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2721 if (layout_types & (1 << i))
2722 *p++ = cpu_to_be32(i);
6896f15a
KM		 2723
2724 return 0;
2725}
2726
42ca0993
BF		 2727#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2728 FATTR4_WORD0_RDATTR_ERROR)
2729#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
c2227a39 2730#define WORD2_ABSENT_FS_ATTRS 0
42ca0993 2731
18032ca0
DQ		 2732#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2733static inline __be32
ddd1ea56
BF		 2734nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2735 void *context, int len)
18032ca0 2736{
ddd1ea56 2737 __be32 *p;
18032ca0 2738
ddd1ea56
BF		 2739 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2740 if (!p)
18032ca0
DQ		 2741 return nfserr_resource;
2742
2743 /*
2744 * For now we use a 0 here to indicate the null translation; in
2745 * the future we may place a call to translation code here.
2746 */
c373b0a4
BF		 2747 *p++ = cpu_to_be32(0); /* lfs */
2748 *p++ = cpu_to_be32(0); /* pi */
18032ca0 2749 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 2750 return 0;
2751}
2752#else
2753static inline __be32
ddd1ea56
BF		 2754nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2755 void *context, int len)
18032ca0
DQ		 2756{ return 0; }
2757#endif
2758
c2227a39 2759static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
42ca0993
BF		 2760{
2761 /* As per referral draft: */
2762 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2763 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2764 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2765 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2766 *rdattr_err = NFSERR_MOVED;
2767 else
2768 return nfserr_moved;
2769 }
2770 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2771 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
c2227a39 2772 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
42ca0993
BF		 2773 return 0;
2774}
1da177e4 2775
ae7095a7
BF		 2776
2777static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2778{
2779 struct path path = exp->ex_path;
2780 int err;
2781
2782 path_get(&path);
2783 while (follow_up(&path)) {
2784 if (path.dentry != path.mnt->mnt_root)
2785 break;
2786 }
a528d35e 2787 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
ae7095a7
BF		 2788 path_put(&path);
2789 return err;
2790}
2791
75976de6
KM		 2792static __be32
2793nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2794{
2795 __be32 *p;
2796
2797 if (bmval2) {
2798 p = xdr_reserve_space(xdr, 16);
2799 if (!p)
2800 goto out_resource;
2801 *p++ = cpu_to_be32(3);
2802 *p++ = cpu_to_be32(bmval0);
2803 *p++ = cpu_to_be32(bmval1);
2804 *p++ = cpu_to_be32(bmval2);
2805 } else if (bmval1) {
2806 p = xdr_reserve_space(xdr, 12);
2807 if (!p)
2808 goto out_resource;
2809 *p++ = cpu_to_be32(2);
2810 *p++ = cpu_to_be32(bmval0);
2811 *p++ = cpu_to_be32(bmval1);
2812 } else {
2813 p = xdr_reserve_space(xdr, 8);
2814 if (!p)
2815 goto out_resource;
2816 *p++ = cpu_to_be32(1);
2817 *p++ = cpu_to_be32(bmval0);
2818 }
2819
2820 return 0;
2821out_resource:
2822 return nfserr_resource;
2823}
2824
1da177e4
LT		 2825/*
2826 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2827 * ourselves.
1da177e4 2828 */
da2ebce6 2829static __be32
d5184658
BF		 2830nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2831 struct svc_export *exp,
2832 struct dentry *dentry, u32 *bmval,
406a7ea9 2833 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2834{
2835 u32 bmval0 = bmval[0];
2836 u32 bmval1 = bmval[1];
7e705706 2837 u32 bmval2 = bmval[2];
1da177e4 2838 struct kstat stat;
d50e6136 2839 struct svc_fh *tempfh = NULL;
1da177e4 2840 struct kstatfs statfs;
ab04de60 2841 __be32 *p, *attrlen_p;
1fcea5b2 2842 int starting_len = xdr->buf->len;
082d4bd7 2843 int attrlen_offset;
1da177e4
LT		 2844 u32 dummy;
2845 u64 dummy64;
42ca0993 2846 u32 rdattr_err = 0;
b37ad28b 2847 __be32 status;
b8dd7b9a 2848 int err;
1da177e4 2849 struct nfs4_acl *acl = NULL;
0ab88ca4 2850#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2851 void *context = NULL;
2852 int contextlen;
0ab88ca4 2853#endif
18032ca0 2854 bool contextsupport = false;
7e705706
AA		 2855 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2856 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2857 struct path path = {
2858 .mnt = exp->ex_path.mnt,
2859 .dentry = dentry,
2860 };
3d733711 2861 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2862
2863 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
916d2d84 2864 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
1da177e4 2865
42ca0993 2866 if (exp->ex_fslocs.migrated) {
c2227a39 2867 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
42ca0993
BF		 2868 if (status)
2869 goto out;
2870 }
2871
a528d35e 2872 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
b8dd7b9a 2873 if (err)
1da177e4 2874 goto out_nfserr;
e377a3e6
OV		 2875 if (!(stat.result_mask & STATX_BTIME))
2876 /* underlying FS does not offer btime so we can't share it */
2877 bmval1 &= ~FATTR4_WORD1_TIME_CREATE;
12337901
CH		 2878 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2879 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2880 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2881 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2882 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2883 if (err)
1da177e4
LT		 2884 goto out_nfserr;
2885 }
2886 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2887 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2888 status = nfserr_jukebox;
2889 if (!tempfh)
2890 goto out;
2891 fh_init(tempfh, NFS4_FHSIZE);
2892 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2893 if (status)
2894 goto out;
d50e6136 2895 fhp = tempfh;
1da177e4 2896 }
0c9d65e7 2897 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2898 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
0c9d65e7
AG		 2899 if (err == -EOPNOTSUPP)
2900 bmval0 &= ~FATTR4_WORD0_ACL;
2901 else if (err == -EINVAL) {
2902 status = nfserr_attrnotsupp;
2903 goto out;
2904 } else if (err != 0)
2905 goto out_nfserr;
1da177e4 2906 }
1da177e4 2907
18032ca0 2908#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
c2227a39
KM		 2909 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2910 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
32ddd944
BF		 2911 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2912 err = security_inode_getsecctx(d_inode(dentry),
18032ca0 2913 &context, &contextlen);
32ddd944
BF		 2914 else
2915 err = -EOPNOTSUPP;
18032ca0
DQ		 2916 contextsupport = (err == 0);
2917 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2918 if (err == -EOPNOTSUPP)
2919 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2920 else if (err)
2921 goto out_nfserr;
2922 }
2923 }
2924#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2925
75976de6
KM		 2926 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2927 if (status)
2928 goto out;
082d4bd7
BF		 2929
2930 attrlen_offset = xdr->buf->len;
ab04de60
CL		 2931 attrlen_p = xdr_reserve_space(xdr, XDR_UNIT);
2932 if (!attrlen_p)
ddd1ea56 2933 goto out_resource;
1da177e4
LT		 2934
2935 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
dcd20869
BF		 2936 u32 supp[3];
2937
2938 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
7e705706 2939
0c9d65e7 2940 if (!IS_POSIXACL(dentry->d_inode))
916d2d84 2941 supp[0] &= ~FATTR4_WORD0_ACL;
18032ca0 2942 if (!contextsupport)
916d2d84
BF		 2943 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2944 if (!supp[2]) {
ddd1ea56
BF		 2945 p = xdr_reserve_space(xdr, 12);
2946 if (!p)
2b44f1ba 2947 goto out_resource;
c373b0a4 2948 *p++ = cpu_to_be32(2);
916d2d84
BF		 2949 *p++ = cpu_to_be32(supp[0]);
2950 *p++ = cpu_to_be32(supp[1]);
7e705706 2951 } else {
ddd1ea56
BF		 2952 p = xdr_reserve_space(xdr, 16);
2953 if (!p)
2b44f1ba 2954 goto out_resource;
c373b0a4 2955 *p++ = cpu_to_be32(3);
916d2d84
BF		 2956 *p++ = cpu_to_be32(supp[0]);
2957 *p++ = cpu_to_be32(supp[1]);
2958 *p++ = cpu_to_be32(supp[2]);
7e705706 2959 }
1da177e4
LT		 2960 }
2961 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2962 p = xdr_reserve_space(xdr, 4);
2963 if (!p)
1da177e4 2964 goto out_resource;
3d2544b1 2965 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2966 if (dummy == NF4BAD) {
2967 status = nfserr_serverfault;
2968 goto out;
2969 }
c373b0a4 2970 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2971 }
2972 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2973 p = xdr_reserve_space(xdr, 4);
2974 if (!p)
1da177e4 2975 goto out_resource;
49640001 2976 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2977 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2978 else
c373b0a4
BF		 2979 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2980 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2981 }
2982 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2983 p = xdr_reserve_space(xdr, 8);
2984 if (!p)
1da177e4 2985 goto out_resource;
b8800921 2986 p = encode_change(p, &stat, d_inode(dentry), exp);
1da177e4
LT		 2987 }
2988 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2989 p = xdr_reserve_space(xdr, 8);
2990 if (!p)
1da177e4 2991 goto out_resource;
b64c7f3b 2992 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2993 }
2994 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2995 p = xdr_reserve_space(xdr, 4);
2996 if (!p)
1da177e4 2997 goto out_resource;
c373b0a4 2998 *p++ = cpu_to_be32(1);
1da177e4
LT		 2999 }
3000 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 3001 p = xdr_reserve_space(xdr, 4);
3002 if (!p)
1da177e4 3003 goto out_resource;
c373b0a4 3004 *p++ = cpu_to_be32(1);
1da177e4
LT		 3005 }
3006 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 3007 p = xdr_reserve_space(xdr, 4);
3008 if (!p)
1da177e4 3009 goto out_resource;
c373b0a4 3010 *p++ = cpu_to_be32(0);
1da177e4
LT		 3011 }
3012 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 3013 p = xdr_reserve_space(xdr, 16);
3014 if (!p)
1da177e4 3015 goto out_resource;
42ca0993 3016 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 3017 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
3018 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 3019 } else switch(fsid_source(fhp)) {
3020 case FSIDSOURCE_FSID:
b64c7f3b
BF		 3021 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
3022 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 3023 break;
3024 case FSIDSOURCE_DEV:
c373b0a4
BF		 3025 *p++ = cpu_to_be32(0);
3026 *p++ = cpu_to_be32(MAJOR(stat.dev));
3027 *p++ = cpu_to_be32(0);
3028 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 3029 break;
3030 case FSIDSOURCE_UUID:
94eb3689
KM		 3031 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
3032 EX_UUID_LEN);
af6a4e28 3033 break;
1da177e4
LT		 3034 }
3035 }
3036 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 3037 p = xdr_reserve_space(xdr, 4);
3038 if (!p)
1da177e4 3039 goto out_resource;
c373b0a4 3040 *p++ = cpu_to_be32(0);
1da177e4
LT		 3041 }
3042 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 3043 p = xdr_reserve_space(xdr, 4);
3044 if (!p)
1da177e4 3045 goto out_resource;
c373b0a4 3046 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 3047 }
3048 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 3049 p = xdr_reserve_space(xdr, 4);
3050 if (!p)
1da177e4 3051 goto out_resource;
c373b0a4 3052 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 3053 }
3054 if (bmval0 & FATTR4_WORD0_ACL) {
3055 struct nfs4_ace *ace;
1da177e4
LT		 3056
3057 if (acl == NULL) {
ddd1ea56
BF		 3058 p = xdr_reserve_space(xdr, 4);
3059 if (!p)
1da177e4
LT		 3060 goto out_resource;
3061
c373b0a4 3062 *p++ = cpu_to_be32(0);
1da177e4
LT		 3063 goto out_acl;
3064 }
ddd1ea56
BF		 3065 p = xdr_reserve_space(xdr, 4);
3066 if (!p)
1da177e4 3067 goto out_resource;
c373b0a4 3068 *p++ = cpu_to_be32(acl->naces);
1da177e4 3069
28e05dd8 3070 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 3071 p = xdr_reserve_space(xdr, 4*3);
3072 if (!p)
1da177e4 3073 goto out_resource;
c373b0a4
BF		 3074 *p++ = cpu_to_be32(ace->type);
3075 *p++ = cpu_to_be32(ace->flag);
3076 *p++ = cpu_to_be32(ace->access_mask &
3077 NFS4_ACE_MASK_ALL);
ddd1ea56 3078 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 3079 if (status)
3080 goto out;
3081 }
3082 }
3083out_acl:
3084 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 3085 p = xdr_reserve_space(xdr, 4);
3086 if (!p)
1da177e4 3087 goto out_resource;
0c9d65e7 3088 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
1da177e4
LT		 3089 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
3090 }
3091 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 3092 p = xdr_reserve_space(xdr, 4);
3093 if (!p)
1da177e4 3094 goto out_resource;
c373b0a4 3095 *p++ = cpu_to_be32(1);
1da177e4
LT		 3096 }
3097 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 3098 p = xdr_reserve_space(xdr, 4);
3099 if (!p)
1da177e4 3100 goto out_resource;
c373b0a4 3101 *p++ = cpu_to_be32(0);
1da177e4
LT		 3102 }
3103 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 3104 p = xdr_reserve_space(xdr, 4);
3105 if (!p)
1da177e4 3106 goto out_resource;
c373b0a4 3107 *p++ = cpu_to_be32(1);
1da177e4
LT		 3108 }
3109 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 3110 p = xdr_reserve_space(xdr, 4);
3111 if (!p)
1da177e4 3112 goto out_resource;
c373b0a4 3113 *p++ = cpu_to_be32(1);
1da177e4
LT		 3114 }
3115 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 3116 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
3117 if (!p)
1da177e4 3118 goto out_resource;
d8b26071 3119 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_raw,
0c0c267b 3120 fhp->fh_handle.fh_size);
1da177e4
LT		 3121 }
3122 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 3123 p = xdr_reserve_space(xdr, 8);
3124 if (!p)
1da177e4 3125 goto out_resource;
b64c7f3b 3126 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 3127 }
3128 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 3129 p = xdr_reserve_space(xdr, 8);
3130 if (!p)
1da177e4 3131 goto out_resource;
b64c7f3b 3132 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 3133 }
3134 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 3135 p = xdr_reserve_space(xdr, 8);
3136 if (!p)
1da177e4 3137 goto out_resource;
b64c7f3b 3138 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 3139 }
3140 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 3141 p = xdr_reserve_space(xdr, 8);
3142 if (!p)
1da177e4 3143 goto out_resource;
b64c7f3b 3144 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 3145 }
81c3f413 3146 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 3147 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 3148 if (status)
3149 goto out;
3150 }
1da177e4 3151 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 3152 p = xdr_reserve_space(xdr, 4);
3153 if (!p)
1da177e4 3154 goto out_resource;
c373b0a4 3155 *p++ = cpu_to_be32(1);
1da177e4
LT		 3156 }
3157 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 3158 p = xdr_reserve_space(xdr, 8);
3159 if (!p)
1da177e4 3160 goto out_resource;
b64c7f3b 3161 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 3162 }
3163 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 3164 p = xdr_reserve_space(xdr, 4);
3165 if (!p)
1da177e4 3166 goto out_resource;
c373b0a4 3167 *p++ = cpu_to_be32(255);
1da177e4
LT		 3168 }
3169 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 3170 p = xdr_reserve_space(xdr, 4);
3171 if (!p)
1da177e4 3172 goto out_resource;
c373b0a4 3173 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 3174 }
3175 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 3176 p = xdr_reserve_space(xdr, 8);
3177 if (!p)
1da177e4 3178 goto out_resource;
b64c7f3b 3179 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 3180 }
3181 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 3182 p = xdr_reserve_space(xdr, 8);
3183 if (!p)
1da177e4 3184 goto out_resource;
b64c7f3b 3185 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 3186 }
3187 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 3188 p = xdr_reserve_space(xdr, 4);
3189 if (!p)
1da177e4 3190 goto out_resource;
c373b0a4 3191 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 3192 }
3193 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 3194 p = xdr_reserve_space(xdr, 4);
3195 if (!p)
1da177e4 3196 goto out_resource;
c373b0a4 3197 *p++ = cpu_to_be32(1);
1da177e4
LT		 3198 }
3199 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 3200 p = xdr_reserve_space(xdr, 4);
3201 if (!p)
1da177e4 3202 goto out_resource;
c373b0a4 3203 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 3204 }
3205 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 3206 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 3207 if (status)
3208 goto out;
3209 }
3210 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 3211 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 3212 if (status)
3213 goto out;
3214 }
3215 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 3216 p = xdr_reserve_space(xdr, 8);
3217 if (!p)
1da177e4 3218 goto out_resource;
c373b0a4
BF		 3219 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
3220 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 3221 }
3222 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 3223 p = xdr_reserve_space(xdr, 8);
3224 if (!p)
1da177e4
LT		 3225 goto out_resource;
3226 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 3227 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3228 }
3229 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 3230 p = xdr_reserve_space(xdr, 8);
3231 if (!p)
1da177e4
LT		 3232 goto out_resource;
3233 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 3234 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3235 }
3236 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 3237 p = xdr_reserve_space(xdr, 8);
3238 if (!p)
1da177e4
LT		 3239 goto out_resource;
3240 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 3241 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3242 }
3243 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 3244 p = xdr_reserve_space(xdr, 8);
3245 if (!p)
1da177e4
LT		 3246 goto out_resource;
3247 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 3248 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3249 }
3250 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 3251 p = xdr_reserve_space(xdr, 12);
3252 if (!p)
1da177e4 3253 goto out_resource;
b64c7f3b 3254 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 3255 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 3256 }
3257 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 3258 p = xdr_reserve_space(xdr, 12);
3259 if (!p)
1da177e4 3260 goto out_resource;
16945141 3261 p = encode_time_delta(p, d_inode(dentry));
1da177e4
LT		 3262 }
3263 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 3264 p = xdr_reserve_space(xdr, 12);
3265 if (!p)
1da177e4 3266 goto out_resource;
b64c7f3b 3267 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 3268 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 3269 }
3270 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 3271 p = xdr_reserve_space(xdr, 12);
3272 if (!p)
1da177e4 3273 goto out_resource;
b64c7f3b 3274 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 3275 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4 3276 }
e377a3e6
OV		 3277 if (bmval1 & FATTR4_WORD1_TIME_CREATE) {
3278 p = xdr_reserve_space(xdr, 12);
3279 if (!p)
3280 goto out_resource;
3281 p = xdr_encode_hyper(p, (s64)stat.btime.tv_sec);
3282 *p++ = cpu_to_be32(stat.btime.tv_nsec);
3283 }
1da177e4 3284 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
0a2050d7
KM		 3285 struct kstat parent_stat;
3286 u64 ino = stat.ino;
3287
ddd1ea56
BF		 3288 p = xdr_reserve_space(xdr, 8);
3289 if (!p)
1da177e4 3290 goto out_resource;
406a7ea9
FF		 3291 /*
3292 * Get parent's attributes if not ignoring crossmount
3293 * and this is the root of a cross-mounted filesystem.
3294 */
3295 if (ignore_crossmnt == 0 &&
0a2050d7
KM		 3296 dentry == exp->ex_path.mnt->mnt_root) {
3297 err = get_parent_attributes(exp, &parent_stat);
3298 if (err)
3299 goto out_nfserr;
3300 ino = parent_stat.ino;
3301 }
3302 p = xdr_encode_hyper(p, ino);
1da177e4 3303 }
9cf514cc 3304#ifdef CONFIG_NFSD_PNFS
6896f15a 3305 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
8a4c3926 3306 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 3307 if (status)
3308 goto out;
3309 }
3310
3311 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
8a4c3926 3312 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 3313 if (status)
3314 goto out;
9cf514cc
CH		 3315 }
3316
3317 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
3318 p = xdr_reserve_space(xdr, 4);
3319 if (!p)
3320 goto out_resource;
3321 *p++ = cpu_to_be32(stat.blksize);
3322 }
3323#endif /* CONFIG_NFSD_PNFS */
8c18f205 3324 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
b26b78cb
TM		 3325 u32 supp[3];
3326
3327 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
3328 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
3329 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
3330 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
3331
3332 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
75976de6
KM		 3333 if (status)
3334 goto out;
8c18f205 3335 }
7e705706 3336
0ab88ca4 3337#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
7d580722
KM		 3338 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
3339 status = nfsd4_encode_security_label(xdr, rqstp, context,
3340 contextlen);
3341 if (status)
3342 goto out;
3343 }
0ab88ca4 3344#endif
7d580722 3345
0e885e84
FL		 3346 if (bmval2 & FATTR4_WORD2_XATTR_SUPPORT) {
3347 p = xdr_reserve_space(xdr, 4);
3348 if (!p)
3349 goto out_resource;
3350 err = xattr_supported_namespace(d_inode(dentry),
3351 XATTR_USER_PREFIX);
3352 *p++ = cpu_to_be32(err == 0);
3353 }
3354
ab04de60 3355 *attrlen_p = cpu_to_be32(xdr->buf->len - attrlen_offset - XDR_UNIT);
1da177e4
LT		 3356 status = nfs_ok;
3357
3358out:
ba4e55bb 3359#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 3360 if (context)
3361 security_release_secctx(context, contextlen);
ba4e55bb 3362#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 3363 kfree(acl);
18df11d0 3364 if (tempfh) {
d50e6136 3365 fh_put(tempfh);
18df11d0
YZ		 3366 kfree(tempfh);
3367 }
1fcea5b2
BF		 3368 if (status)
3369 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3370 return status;
3371out_nfserr:
b8dd7b9a 3372 status = nfserrno(err);
1da177e4
LT		 3373 goto out;
3374out_resource:
1da177e4
LT		 3375 status = nfserr_resource;
3376 goto out;
1da177e4
LT		 3377}
3378
2825a7f9
BF		 3379static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
3380 struct xdr_buf *buf, __be32 *p, int bytes)
3381{
3382 xdr->scratch.iov_len = 0;
3383 memset(buf, 0, sizeof(struct xdr_buf));
3384 buf->head[0].iov_base = p;
3385 buf->head[0].iov_len = 0;
3386 buf->len = 0;
3387 xdr->buf = buf;
3388 xdr->iov = buf->head;
3389 xdr->p = p;
3390 xdr->end = (void *)p + bytes;
3391 buf->buflen = bytes;
3392}
3393
d5184658
BF		 3394__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
3395 struct svc_fh *fhp, struct svc_export *exp,
3396 struct dentry *dentry, u32 *bmval,
3397 struct svc_rqst *rqstp, int ignore_crossmnt)
3398{
2825a7f9 3399 struct xdr_buf dummy;
d5184658
BF		 3400 struct xdr_stream xdr;
3401 __be32 ret;
3402
2825a7f9 3403 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 3404 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
3405 ignore_crossmnt);
3406 *p = xdr.p;
3407 return ret;
3408}
3409
c0ce6ec8
BF		 3410static inline int attributes_need_mount(u32 *bmval)
3411{
3412 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
3413 return 1;
3414 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
3415 return 1;
3416 return 0;
3417}
3418
b37ad28b 3419static __be32
561f0ed4
BF		 3420nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
3421 const char *name, int namlen)
1da177e4
LT		 3422{
3423 struct svc_export *exp = cd->rd_fhp->fh_export;
3424 struct dentry *dentry;
b37ad28b 3425 __be32 nfserr;
406a7ea9 3426 int ignore_crossmnt = 0;
1da177e4 3427
6c2d4798 3428 dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
1da177e4
LT		 3429 if (IS_ERR(dentry))
3430 return nfserrno(PTR_ERR(dentry));
3431
3432 exp_get(exp);
406a7ea9
FF		 3433 /*
3434 * In the case of a mountpoint, the client may be asking for
3435 * attributes that are only properties of the underlying filesystem
3436 * as opposed to the cross-mounted file system. In such a case,
3437 * we will not follow the cross mount and will fill the attribtutes
3438 * directly from the mountpoint dentry.
3439 */
3227fa41 3440 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 3441 int err;
3442
3227fa41
BF		 3443 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3444 && !attributes_need_mount(cd->rd_bmval)) {
3445 ignore_crossmnt = 1;
3446 goto out_encode;
3447 }
dcb488a3
AA		 3448 /*
3449 * Why the heck aren't we just using nfsd_lookup??
3450 * Different "."/".." handling? Something else?
3451 * At least, add a comment here to explain....
3452 */
021d3a72
BF		 3453 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3454 if (err) {
3455 nfserr = nfserrno(err);
1da177e4
LT		 3456 goto out_put;
3457 }
dcb488a3
AA		 3458 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3459 if (nfserr)
3460 goto out_put;
1da177e4
LT		 3461
3462 }
3227fa41 3463out_encode:
561f0ed4 3464 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 3465 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 3466out_put:
3467 dput(dentry);
3468 exp_put(exp);
3469 return nfserr;
3470}
3471
2ebbc012 3472static __be32 *
561f0ed4 3473nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 3474{
561f0ed4
BF		 3475 __be32 *p;
3476
c3a45617 3477 p = xdr_reserve_space(xdr, 20);
561f0ed4 3478 if (!p)
1da177e4
LT		 3479 return NULL;
3480 *p++ = htonl(2);
3481 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
3482 *p++ = htonl(0); /* bmval1 */
3483
87915c64 3484 *p++ = htonl(4); /* attribute length */
1da177e4 3485 *p++ = nfserr; /* no htonl */
1da177e4
LT		 3486 return p;
3487}
3488
3489static int
a0ad13ef
N		 3490nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3491 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 3492{
a0ad13ef 3493 struct readdir_cd *ccd = ccdv;
1da177e4 3494 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 3495 struct xdr_stream *xdr = cd->xdr;
3496 int start_offset = xdr->buf->len;
3497 int cookie_offset;
aee37764 3498 u32 name_and_cookie;
561f0ed4 3499 int entry_bytes;
b37ad28b 3500 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 3501 __be64 wire_offset;
3502 __be32 *p;
1da177e4
LT		 3503
3504 /* In nfsv4, "." and ".." never make it onto the wire.. */
3505 if (name && isdotent(name, namlen)) {
3506 cd->common.err = nfs_ok;
3507 return 0;
3508 }
3509
561f0ed4
BF		 3510 if (cd->cookie_offset) {
3511 wire_offset = cpu_to_be64(offset);
3512 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3513 &wire_offset, 8);
3514 }
1da177e4 3515
561f0ed4
BF		 3516 p = xdr_reserve_space(xdr, 4);
3517 if (!p)
1da177e4 3518 goto fail;
1da177e4 3519 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 3520 cookie_offset = xdr->buf->len;
3521 p = xdr_reserve_space(xdr, 3*4 + namlen);
3522 if (!p)
3523 goto fail;
c306d737 3524 p = xdr_encode_hyper(p, OFFSET_MAX); /* offset of next entry */
1da177e4
LT		 3525 p = xdr_encode_array(p, name, namlen); /* name length & name */
3526
561f0ed4 3527 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 3528 switch (nfserr) {
3529 case nfs_ok:
1da177e4
LT		 3530 break;
3531 case nfserr_resource:
3532 nfserr = nfserr_toosmall;
3533 goto fail;
b2c0cea6 3534 case nfserr_noent:
f41c5ad2 3535 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 3536 goto skip_entry;
1da177e4
LT		 3537 default:
3538 /*
3539 * If the client requested the RDATTR_ERROR attribute,
3540 * we stuff the error code into this attribute
3541 * and continue. If this attribute was not requested,
3542 * then in accordance with the spec, we fail the
3543 * entire READDIR operation(!)
3544 */
3545 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3546 goto fail;
561f0ed4 3547 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 3548 if (p == NULL) {
3549 nfserr = nfserr_toosmall;
1da177e4 3550 goto fail;
34081efc 3551 }
1da177e4 3552 }
561f0ed4
BF		 3553 nfserr = nfserr_toosmall;
3554 entry_bytes = xdr->buf->len - start_offset;
3555 if (entry_bytes > cd->rd_maxcount)
3556 goto fail;
3557 cd->rd_maxcount -= entry_bytes;
aee37764 3558 /*
f2e717d6
TM		 3559 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", and
3560 * notes that it could be zero. If it is zero, then the server
3561 * should enforce only the rd_maxcount value.
aee37764 3562 */
f2e717d6
TM		 3563 if (cd->rd_dircount) {
3564 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3565 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3566 goto fail;
3567 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3568 if (!cd->rd_dircount)
3569 cd->rd_maxcount = 0;
3570 }
0ec016e3 3571
561f0ed4 3572 cd->cookie_offset = cookie_offset;
b2c0cea6 3573skip_entry:
1da177e4
LT		 3574 cd->common.err = nfs_ok;
3575 return 0;
3576fail:
561f0ed4 3577 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 3578 cd->common.err = nfserr;
3579 return -EINVAL;
3580}
3581
d0a381dd
BF		 3582static __be32
3583nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 3584{
bc749ca4 3585 __be32 *p;
e2f282b9 3586
d0a381dd
BF		 3587 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3588 if (!p)
3589 return nfserr_resource;
c373b0a4 3590 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 3591 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3592 sizeof(stateid_opaque_t));
d0a381dd 3593 return 0;
e2f282b9
BH		 3594}
3595
695e12f8 3596static __be32
b37ad28b 3597nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 3598{
bddfdbcd 3599 struct xdr_stream *xdr = resp->xdr;
bc749ca4 3600 __be32 *p;
1da177e4 3601
bac966d6
BF		 3602 p = xdr_reserve_space(xdr, 8);
3603 if (!p)
3604 return nfserr_resource;
3605 *p++ = cpu_to_be32(access->ac_supported);
3606 *p++ = cpu_to_be32(access->ac_resp_access);
3607 return 0;
1da177e4
LT		 3608}
3609
1d1bc8f2
BF		 3610static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3611{
bddfdbcd 3612 struct xdr_stream *xdr = resp->xdr;
1d1bc8f2
BF		 3613 __be32 *p;
3614
bac966d6
BF		 3615 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3616 if (!p)
3617 return nfserr_resource;
3618 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3619 NFS4_MAX_SESSIONID_LEN);
3620 *p++ = cpu_to_be32(bcts->dir);
3621 /* Upshifting from TCP to RDMA is not supported */
3622 *p++ = cpu_to_be32(0);
3623 return 0;
1d1bc8f2
BF		 3624}
3625
695e12f8 3626static __be32
b37ad28b 3627nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 3628{
bddfdbcd 3629 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3630
bac966d6 3631 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
1da177e4
LT		 3632}
3633
3634
695e12f8 3635static __be32
b37ad28b 3636nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 3637{
bddfdbcd 3638 struct xdr_stream *xdr = resp->xdr;
bc749ca4 3639 __be32 *p;
1da177e4 3640
bac966d6
BF		 3641 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3642 if (!p)
3643 return nfserr_resource;
3644 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
0c0c267b 3645 NFS4_VERIFIER_SIZE);
bac966d6 3646 return 0;
1da177e4
LT		 3647}
3648
695e12f8 3649static __be32
b37ad28b 3650nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 3651{
bddfdbcd 3652 struct xdr_stream *xdr = resp->xdr;
bc749ca4 3653 __be32 *p;
1da177e4 3654
bac966d6
BF		 3655 p = xdr_reserve_space(xdr, 20);
3656 if (!p)
3657 return nfserr_resource;
3658 encode_cinfo(p, &create->cr_cinfo);
b96811cd 3659 return nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
bac966d6 3660 create->cr_bmval[1], create->cr_bmval[2]);
1da177e4
LT		 3661}
3662
b37ad28b
AV		 3663static __be32
3664nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 3665{
3666 struct svc_fh *fhp = getattr->ga_fhp;
bddfdbcd 3667 struct xdr_stream *xdr = resp->xdr;
1da177e4 3668
bac966d6
BF		 3669 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3670 getattr->ga_bmval, resp->rqstp, 0);
1da177e4
LT		 3671}
3672
695e12f8
BH		 3673static __be32
3674nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 3675{
bddfdbcd 3676 struct xdr_stream *xdr = resp->xdr;
695e12f8 3677 struct svc_fh *fhp = *fhpp;
1da177e4 3678 unsigned int len;
bc749ca4 3679 __be32 *p;
1da177e4 3680
bac966d6
BF		 3681 len = fhp->fh_handle.fh_size;
3682 p = xdr_reserve_space(xdr, len + 4);
3683 if (!p)
3684 return nfserr_resource;
d8b26071 3685 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_raw, len);
bac966d6 3686 return 0;
1da177e4
LT		 3687}
3688
3689/*
3690* Including all fields other than the name, a LOCK4denied structure requires
3691* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3692*/
d0a381dd
BF		 3693static __be32
3694nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 3695{
7c13f344 3696 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 3697 __be32 *p;
1da177e4 3698
8c7424cf 3699again:
d0a381dd 3700 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 3701 if (!p) {
3702 /*
3703 * Don't fail to return the result just because we can't
3704 * return the conflicting open:
3705 */
3706 if (conf->len) {
f98bac5a 3707 kfree(conf->data);
8c7424cf
BF		 3708 conf->len = 0;
3709 conf->data = NULL;
3710 goto again;
3711 }
d0a381dd 3712 return nfserr_resource;
8c7424cf 3713 }
b64c7f3b
BF		 3714 p = xdr_encode_hyper(p, ld->ld_start);
3715 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 3716 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 3717 if (conf->len) {
0c0c267b
BF		 3718 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3719 p = xdr_encode_opaque(p, conf->data, conf->len);
f98bac5a 3720 kfree(conf->data);
1da177e4 3721 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 3722 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 3723 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 3724 }
d0a381dd 3725 return nfserr_denied;
1da177e4
LT		 3726}
3727
695e12f8 3728static __be32
b37ad28b 3729nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 3730{
bddfdbcd 3731 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3732
e2f282b9 3733 if (!nfserr)
d0a381dd 3734 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 3735 else if (nfserr == nfserr_denied)
d0a381dd 3736 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
f98bac5a 3737
695e12f8 3738 return nfserr;
1da177e4
LT		 3739}
3740
695e12f8 3741static __be32
b37ad28b 3742nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 3743{
bddfdbcd 3744 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3745
1da177e4 3746 if (nfserr == nfserr_denied)
d0a381dd 3747 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 3748 return nfserr;
1da177e4
LT		 3749}
3750
695e12f8 3751static __be32
b37ad28b 3752nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 3753{
bddfdbcd 3754 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3755
bac966d6 3756 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
1da177e4
LT		 3757}
3758
3759
695e12f8 3760static __be32
b37ad28b 3761nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 3762{
bddfdbcd 3763 struct xdr_stream *xdr = resp->xdr;
bc749ca4 3764 __be32 *p;
1da177e4 3765
bac966d6
BF		 3766 p = xdr_reserve_space(xdr, 20);
3767 if (!p)
3768 return nfserr_resource;
3769 p = encode_cinfo(p, &link->li_cinfo);
3770 return 0;
1da177e4
LT		 3771}
3772
3773
695e12f8 3774static __be32
b37ad28b 3775nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 3776{
bddfdbcd 3777 struct xdr_stream *xdr = resp->xdr;
bc749ca4 3778 __be32 *p;
1da177e4 3779
d0a381dd
BF		 3780 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3781 if (nfserr)
bac966d6 3782 return nfserr;
75976de6 3783 p = xdr_reserve_space(xdr, 24);
d0a381dd
BF		 3784 if (!p)
3785 return nfserr_resource;
d05d5744 3786 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4 3787 *p++ = cpu_to_be32(open->op_rflags);
1da177e4 3788
75976de6
KM		 3789 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3790 open->op_bmval[2]);
3791 if (nfserr)
bac966d6 3792 return nfserr;
75976de6
KM		 3793
3794 p = xdr_reserve_space(xdr, 4);
3795 if (!p)
3796 return nfserr_resource;
3797
3798 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 3799 switch (open->op_delegate_type) {
3800 case NFS4_OPEN_DELEGATE_NONE:
3801 break;
3802 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 3803 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3804 if (nfserr)
3805 return nfserr;
3806 p = xdr_reserve_space(xdr, 20);
3807 if (!p)
3808 return nfserr_resource;
c373b0a4 3809 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 3810
3811 /*
3812 * TODO: ACE's in delegations
3813 */
c373b0a4
BF		 3814 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3815 *p++ = cpu_to_be32(0);
3816 *p++ = cpu_to_be32(0);
3817 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 3818 break;
3819 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 3820 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3821 if (nfserr)
3822 return nfserr;
3823 p = xdr_reserve_space(xdr, 32);
3824 if (!p)
3825 return nfserr_resource;
c373b0a4 3826 *p++ = cpu_to_be32(0);
1da177e4
LT		 3827
3828 /*
3829 * TODO: space_limit's in delegations
3830 */
c373b0a4
BF		 3831 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3832 *p++ = cpu_to_be32(~(u32)0);
3833 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3834
3835 /*
3836 * TODO: ACE's in delegations
3837 */
c373b0a4
BF		 3838 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3839 *p++ = cpu_to_be32(0);
3840 *p++ = cpu_to_be32(0);
3841 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3842 break;
d24433cd
BH		 3843 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3844 switch (open->op_why_no_deleg) {
3845 case WND4_CONTENTION:
3846 case WND4_RESOURCE:
d0a381dd
BF		 3847 p = xdr_reserve_space(xdr, 8);
3848 if (!p)
3849 return nfserr_resource;
c373b0a4
BF		 3850 *p++ = cpu_to_be32(open->op_why_no_deleg);
3851 /* deleg signaling not supported yet: */
3852 *p++ = cpu_to_be32(0);
d24433cd
BH		 3853 break;
3854 default:
d0a381dd
BF		 3855 p = xdr_reserve_space(xdr, 4);
3856 if (!p)
3857 return nfserr_resource;
c373b0a4 3858 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3859 }
d24433cd 3860 break;
1da177e4
LT		 3861 default:
3862 BUG();
3863 }
3864 /* XXX save filehandle here */
bac966d6 3865 return 0;
1da177e4
LT		 3866}
3867
695e12f8 3868static __be32
b37ad28b 3869nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3870{
bddfdbcd 3871 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3872
bac966d6 3873 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4
LT		 3874}
3875
695e12f8 3876static __be32
b37ad28b 3877nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3878{
bddfdbcd 3879 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3880
bac966d6 3881 return nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4
LT		 3882}
3883
dc97618d
BF		 3884static __be32 nfsd4_encode_splice_read(
3885 struct nfsd4_compoundres *resp,
3886 struct nfsd4_read *read,
3887 struct file *file, unsigned long maxcount)
1da177e4 3888{
bddfdbcd 3889 struct xdr_stream *xdr = resp->xdr;
34a78b48 3890 struct xdr_buf *buf = xdr->buf;
76e5492b 3891 int status, space_left;
dc97618d 3892 __be32 nfserr;
1da177e4 3893
d5d5c304
KM		 3894 /* Make sure there will be room for padding if needed */
3895 if (xdr->end - xdr->p < 1)
d0a381dd 3896 return nfserr_resource;
dc97618d 3897
87c5942e 3898 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
24c7fb85
CL		 3899 file, read->rd_offset, &maxcount,
3900 &read->rd_eof);
87c5942e 3901 read->rd_length = maxcount;
76e5492b
CL		 3902 if (nfserr)
3903 goto out_err;
3904 status = svc_encode_result_payload(read->rd_rqstp,
3905 buf->head[0].iov_len, maxcount);
3906 if (status) {
3907 nfserr = nfserrno(status);
3908 goto out_err;
b0e35fda 3909 }
1da177e4 3910
34a78b48
BF		 3911 buf->page_len = maxcount;
3912 buf->len += maxcount;
15b23ef5
BF		 3913 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3914 / PAGE_SIZE;
dc97618d
BF		 3915
3916 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3917 buf->tail[0].iov_base = xdr->p;
3918 buf->tail[0].iov_len = 0;
fec25fa4 3919 xdr->iov = buf->tail;
dc97618d 3920 if (maxcount&3) {
fec25fa4
BF		 3921 int pad = 4 - (maxcount&3);
3922
3923 *(xdr->p++) = 0;
3924
34a78b48 3925 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3926 buf->tail[0].iov_len = pad;
3927 buf->len += pad;
b0e35fda 3928 }
2825a7f9 3929
dc97618d 3930 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3931 buf->buflen - buf->len);
3932 buf->buflen = buf->len + space_left;
dc97618d
BF		 3933 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3934
3935 return 0;
76e5492b
CL		 3936
3937out_err:
3938 /*
3939 * nfsd_splice_actor may have already messed with the
3940 * page length; reset it so as not to confuse
3941 * xdr_truncate_encode in our caller.
3942 */
3943 buf->page_len = 0;
3944 return nfserr;
dc97618d
BF		 3945}
3946
3947static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3948 struct nfsd4_read *read,
3949 struct file *file, unsigned long maxcount)
3950{
bddfdbcd 3951 struct xdr_stream *xdr = resp->xdr;
071ae99f 3952 unsigned int starting_len = xdr->buf->len;
5e64d85c 3953 __be32 zero = xdr_zero;
dc97618d 3954 __be32 nfserr;
1da177e4 3955
403217f3
AS		 3956 read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, maxcount);
3957 if (read->rd_vlen < 0)
3958 return nfserr_resource;
1da177e4 3959
87c5942e 3960 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
83a63072 3961 resp->rqstp->rq_vec, read->rd_vlen, &maxcount,
24c7fb85 3962 &read->rd_eof);
87c5942e 3963 read->rd_length = maxcount;
dc97618d 3964 if (nfserr)
1da177e4 3965 return nfserr;
071ae99f 3966 if (svc_encode_result_payload(resp->rqstp, starting_len, maxcount))
41205539 3967 return nfserr_io;
071ae99f 3968 xdr_truncate_encode(xdr, starting_len + xdr_align_size(maxcount));
dc97618d 3969
5e64d85c
CL		 3970 write_bytes_to_xdr_buf(xdr->buf, starting_len + maxcount, &zero,
3971 xdr_pad_size(maxcount));
3972 return nfs_ok;
dc97618d
BF		 3973}
3974
3975static __be32
3976nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3977 struct nfsd4_read *read)
3978{
c738b218 3979 bool splice_ok = test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags);
dc97618d 3980 unsigned long maxcount;
bddfdbcd 3981 struct xdr_stream *xdr = resp->xdr;
5c4583b2 3982 struct file *file;
dc97618d 3983 int starting_len = xdr->buf->len;
dc97618d 3984 __be32 *p;
dc97618d 3985
5c4583b2
JL		 3986 if (nfserr)
3987 return nfserr;
3988 file = read->rd_nf->nf_file;
3989
dc97618d
BF		 3990 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3991 if (!p) {
c738b218 3992 WARN_ON_ONCE(splice_ok);
bac966d6 3993 return nfserr_resource;
dc97618d 3994 }
c738b218 3995 if (resp->xdr->buf->page_len && splice_ok) {
b0420980 3996 WARN_ON_ONCE(1);
bac966d6 3997 return nfserr_resource;
dc97618d 3998 }
dc97618d
BF		 3999 xdr_commit_encode(xdr);
4000
0cb4d23a 4001 maxcount = min_t(unsigned long, read->rd_length,
68e8bb03 4002 (xdr->buf->buflen - xdr->buf->len));
dc97618d 4003
c738b218 4004 if (file->f_op->splice_read && splice_ok)
96bcad50 4005 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
dc97618d 4006 else
96bcad50 4007 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
28d5bc46 4008 if (nfserr) {
dc97618d 4009 xdr_truncate_encode(xdr, starting_len);
28d5bc46
CL		 4010 return nfserr;
4011 }
96bcad50 4012
28d5bc46
CL		 4013 p = xdr_encode_bool(p, read->rd_eof);
4014 *p = cpu_to_be32(read->rd_length);
4015 return nfs_ok;
1da177e4
LT		 4016}
4017
b37ad28b
AV		 4018static __be32
4019nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4 4020{
99b002a1 4021 __be32 *p, *maxcount_p, zero = xdr_zero;
bddfdbcd 4022 struct xdr_stream *xdr = resp->xdr;
1fcea5b2 4023 int length_offset = xdr->buf->len;
99b002a1 4024 int maxcount, status;
1da177e4 4025
99b002a1
CL		 4026 maxcount_p = xdr_reserve_space(xdr, XDR_UNIT);
4027 if (!maxcount_p)
2825a7f9 4028 return nfserr_resource;
1da177e4 4029 maxcount = PAGE_SIZE;
d0a381dd 4030
476a7b1f
BF		 4031 p = xdr_reserve_space(xdr, maxcount);
4032 if (!p)
4e21ac4b 4033 return nfserr_resource;
1da177e4 4034 /*
fd4a0edf
MS		 4035 * XXX: By default, vfs_readlink() will truncate symlinks if they
4036 * would overflow the buffer. Is this kosher in NFSv4? If not, one
4037 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
4038 * that truncation occurred, and return NFS4ERR_RESOURCE.
1da177e4 4039 */
476a7b1f
BF		 4040 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
4041 (char *)p, &maxcount);
1da177e4 4042 if (nfserr == nfserr_isdir)
d3f627c8 4043 nfserr = nfserr_inval;
76e5492b
CL		 4044 if (nfserr)
4045 goto out_err;
4046 status = svc_encode_result_payload(readlink->rl_rqstp, length_offset,
4047 maxcount);
4048 if (status) {
4049 nfserr = nfserrno(status);
4050 goto out_err;
d3f627c8 4051 }
99b002a1
CL		 4052 *maxcount_p = cpu_to_be32(maxcount);
4053 xdr_truncate_encode(xdr, length_offset + 4 + xdr_align_size(maxcount));
4054 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, &zero,
4055 xdr_pad_size(maxcount));
4056 return nfs_ok;
76e5492b
CL		 4057
4058out_err:
4059 xdr_truncate_encode(xdr, length_offset);
4060 return nfserr;
1da177e4
LT		 4061}
4062
b37ad28b
AV		 4063static __be32
4064nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 4065{
4066 int maxcount;
561f0ed4 4067 int bytes_left;
1da177e4 4068 loff_t offset;
561f0ed4 4069 __be64 wire_offset;
bddfdbcd 4070 struct xdr_stream *xdr = resp->xdr;
1fcea5b2 4071 int starting_len = xdr->buf->len;
bc749ca4 4072 __be32 *p;
1da177e4 4073
d0a381dd
BF		 4074 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
4075 if (!p)
4076 return nfserr_resource;
1da177e4
LT		 4077
4078 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 4079 *p++ = cpu_to_be32(0);
4080 *p++ = cpu_to_be32(0);
bddfdbcd
CL		 4081 xdr->buf->head[0].iov_len = (char *)xdr->p -
4082 (char *)xdr->buf->head[0].iov_base;
1da177e4
LT		 4083
4084 /*
561f0ed4
BF		 4085 * Number of bytes left for directory entries allowing for the
4086 * final 8 bytes of the readdir and a following failed op:
4087 */
4088 bytes_left = xdr->buf->buflen - xdr->buf->len
4089 - COMPOUND_ERR_SLACK_SPACE - 8;
4090 if (bytes_left < 0) {
4091 nfserr = nfserr_resource;
4092 goto err_no_verf;
4093 }
9c2ece6e
SM		 4094 maxcount = svc_max_payload(resp->rqstp);
4095 maxcount = min_t(u32, readdir->rd_maxcount, maxcount);
561f0ed4
BF		 4096 /*
4097 * Note the rfc defines rd_maxcount as the size of the
4098 * READDIR4resok structure, which includes the verifier above
4099 * and the 8 bytes encoded at the end of this function:
1da177e4 4100 */
561f0ed4
BF		 4101 if (maxcount < 16) {
4102 nfserr = nfserr_toosmall;
1da177e4
LT		 4103 goto err_no_verf;
4104 }
561f0ed4 4105 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 4106
aee37764
BF		 4107 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
4108 if (!readdir->rd_dircount)
9c2ece6e 4109 readdir->rd_dircount = svc_max_payload(resp->rqstp);
aee37764 4110
561f0ed4
BF		 4111 readdir->xdr = xdr;
4112 readdir->rd_maxcount = maxcount;
1da177e4 4113 readdir->common.err = 0;
561f0ed4 4114 readdir->cookie_offset = 0;
1da177e4
LT		 4115
4116 offset = readdir->rd_cookie;
4117 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
4118 &offset,
4119 &readdir->common, nfsd4_encode_dirent);
4120 if (nfserr == nfs_ok &&
4121 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 4122 xdr->buf->len == starting_len + 8) {
4123 /* nothing encoded; which limit did we hit?: */
4124 if (maxcount - 16 < bytes_left)
4125 /* It was the fault of rd_maxcount: */
4126 nfserr = nfserr_toosmall;
4127 else
4128 /* We ran out of buffer space: */
4129 nfserr = nfserr_resource;
4130 }
1da177e4
LT		 4131 if (nfserr)
4132 goto err_no_verf;
4133
561f0ed4
BF		 4134 if (readdir->cookie_offset) {
4135 wire_offset = cpu_to_be64(offset);
4136 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
4137 &wire_offset, 8);
4138 }
1da177e4 4139
561f0ed4
BF		 4140 p = xdr_reserve_space(xdr, 8);
4141 if (!p) {
4142 WARN_ON_ONCE(1);
4143 goto err_no_verf;
4144 }
1da177e4
LT		 4145 *p++ = 0; /* no more entries */
4146 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 4147
4148 return 0;
4149err_no_verf:
1fcea5b2 4150 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 4151 return nfserr;
4152}
4153
695e12f8 4154static __be32
b37ad28b 4155nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 4156{
bddfdbcd 4157 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4158 __be32 *p;
1da177e4 4159
bac966d6
BF		 4160 p = xdr_reserve_space(xdr, 20);
4161 if (!p)
4162 return nfserr_resource;
4163 p = encode_cinfo(p, &remove->rm_cinfo);
4164 return 0;
1da177e4
LT		 4165}
4166
695e12f8 4167static __be32
b37ad28b 4168nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 4169{
bddfdbcd 4170 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4171 __be32 *p;
1da177e4 4172
bac966d6
BF		 4173 p = xdr_reserve_space(xdr, 40);
4174 if (!p)
4175 return nfserr_resource;
4176 p = encode_cinfo(p, &rename->rn_sinfo);
4177 p = encode_cinfo(p, &rename->rn_tinfo);
4178 return 0;
1da177e4
LT		 4179}
4180
695e12f8 4181static __be32
bac966d6 4182nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
dcb488a3 4183{
676e4ebd 4184 u32 i, nflavs, supported;
4796f457
BF		 4185 struct exp_flavor_info *flavs;
4186 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 4187 __be32 *p, *flavorsp;
4188 static bool report = true;
dcb488a3 4189
4796f457
BF		 4190 if (exp->ex_nflavors) {
4191 flavs = exp->ex_flavors;
4192 nflavs = exp->ex_nflavors;
4193 } else { /* Handling of some defaults in absence of real secinfo: */
4194 flavs = def_flavs;
4195 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
4196 nflavs = 2;
4197 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
4198 flavs[1].pseudoflavor = RPC_AUTH_NULL;
4199 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
4200 nflavs = 1;
4201 flavs[0].pseudoflavor
4202 = svcauth_gss_flavor(exp->ex_client);
4203 } else {
4204 nflavs = 1;
4205 flavs[0].pseudoflavor
4206 = exp->ex_client->flavour->flavour;
4207 }
4208 }
4209
676e4ebd 4210 supported = 0;
d0a381dd
BF		 4211 p = xdr_reserve_space(xdr, 4);
4212 if (!p)
bac966d6 4213 return nfserr_resource;
676e4ebd 4214 flavorsp = p++; /* to be backfilled later */
676e4ebd 4215
4796f457 4216 for (i = 0; i < nflavs; i++) {
676e4ebd 4217 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 4218 struct rpcsec_gss_info info;
dcb488a3 4219
676e4ebd
CL		 4220 if (rpcauth_get_gssinfo(pf, &info) == 0) {
4221 supported++;
d0a381dd
BF		 4222 p = xdr_reserve_space(xdr, 4 + 4 +
4223 XDR_LEN(info.oid.len) + 4 + 4);
4224 if (!p)
bac966d6 4225 return nfserr_resource;
c373b0a4 4226 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 4227 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 4228 *p++ = cpu_to_be32(info.qop);
4229 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 4230 } else if (pf < RPC_AUTH_MAXFLAVOR) {
4231 supported++;
d0a381dd
BF		 4232 p = xdr_reserve_space(xdr, 4);
4233 if (!p)
bac966d6 4234 return nfserr_resource;
c373b0a4 4235 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 4236 } else {
4237 if (report)
4238 pr_warn("NFS: SECINFO: security flavor %u "
4239 "is not supported\n", pf);
dcb488a3
AA		 4240 }
4241 }
a77c806f 4242
676e4ebd
CL		 4243 if (nflavs != supported)
4244 report = false;
4245 *flavorsp = htonl(supported);
bac966d6 4246 return 0;
dcb488a3
AA		 4247}
4248
22b6dee8
MJ		 4249static __be32
4250nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4251 struct nfsd4_secinfo *secinfo)
4252{
bddfdbcd 4253 struct xdr_stream *xdr = resp->xdr;
d0a381dd 4254
bac966d6 4255 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
22b6dee8
MJ		 4256}
4257
4258static __be32
4259nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
4260 struct nfsd4_secinfo_no_name *secinfo)
4261{
bddfdbcd 4262 struct xdr_stream *xdr = resp->xdr;
d0a381dd 4263
bac966d6 4264 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
22b6dee8
MJ		 4265}
4266
1da177e4
LT		 4267/*
4268 * The SETATTR encode routine is special -- it always encodes a bitmap,
4269 * regardless of the error status.
4270 */
695e12f8 4271static __be32
b37ad28b 4272nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 4273{
bddfdbcd 4274 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4275 __be32 *p;
1da177e4 4276
d0a381dd
BF		 4277 p = xdr_reserve_space(xdr, 16);
4278 if (!p)
4279 return nfserr_resource;
1da177e4 4280 if (nfserr) {
c373b0a4
BF		 4281 *p++ = cpu_to_be32(3);
4282 *p++ = cpu_to_be32(0);
4283 *p++ = cpu_to_be32(0);
4284 *p++ = cpu_to_be32(0);
1da177e4
LT		 4285 }
4286 else {
c373b0a4
BF		 4287 *p++ = cpu_to_be32(3);
4288 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
4289 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
4290 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 4291 }
695e12f8 4292 return nfserr;
1da177e4
LT		 4293}
4294
695e12f8 4295static __be32
b37ad28b 4296nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 4297{
bddfdbcd 4298 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4299 __be32 *p;
1da177e4
LT		 4300
4301 if (!nfserr) {
d0a381dd
BF		 4302 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
4303 if (!p)
4304 return nfserr_resource;
0c0c267b
BF		 4305 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
4306 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
4307 NFS4_VERIFIER_SIZE);
1da177e4
LT		 4308 }
4309 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 4310 p = xdr_reserve_space(xdr, 8);
4311 if (!p)
4312 return nfserr_resource;
c373b0a4
BF		 4313 *p++ = cpu_to_be32(0);
4314 *p++ = cpu_to_be32(0);
1da177e4 4315 }
695e12f8 4316 return nfserr;
1da177e4
LT		 4317}
4318
695e12f8 4319static __be32
b37ad28b 4320nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 4321{
bddfdbcd 4322 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4323 __be32 *p;
1da177e4 4324
bac966d6
BF		 4325 p = xdr_reserve_space(xdr, 16);
4326 if (!p)
4327 return nfserr_resource;
4328 *p++ = cpu_to_be32(write->wr_bytes_written);
4329 *p++ = cpu_to_be32(write->wr_how_written);
4330 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4331 NFS4_VERIFIER_SIZE);
4332 return 0;
1da177e4
LT		 4333}
4334
2db134eb 4335static __be32
57b7b43b 4336nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4337 struct nfsd4_exchange_id *exid)
4338{
bddfdbcd 4339 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4340 __be32 *p;
0733d213
AA		 4341 char *major_id;
4342 char *server_scope;
4343 int major_id_sz;
4344 int server_scope_sz;
4345 uint64_t minor_id = 0;
7627d7dc 4346 struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id);
0733d213 4347
7627d7dc
SM		 4348 major_id = nn->nfsd_name;
4349 major_id_sz = strlen(nn->nfsd_name);
4350 server_scope = nn->nfsd_name;
4351 server_scope_sz = strlen(nn->nfsd_name);
0733d213 4352
d0a381dd 4353 p = xdr_reserve_space(xdr,
0733d213
AA		 4354 8 /* eir_clientid */ +
4355 4 /* eir_sequenceid */ +
4356 4 /* eir_flags */ +
a8bb84bc 4357 4 /* spr_how */);
d0a381dd
BF		 4358 if (!p)
4359 return nfserr_resource;
0733d213 4360
0c0c267b 4361 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 4362 *p++ = cpu_to_be32(exid->seqid);
4363 *p++ = cpu_to_be32(exid->flags);
0733d213 4364
c373b0a4 4365 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 4366
57266a6e
BF		 4367 switch (exid->spa_how) {
4368 case SP4_NONE:
4369 break;
4370 case SP4_MACH_CRED:
4371 /* spo_must_enforce bitmap: */
bac966d6 4372 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 4373 exid->spo_must_enforce[0],
4374 exid->spo_must_enforce[1],
4375 exid->spo_must_enforce[2]);
bac966d6
BF		 4376 if (nfserr)
4377 return nfserr;
ed941643 4378 /* spo_must_allow bitmap: */
bac966d6 4379 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 4380 exid->spo_must_allow[0],
4381 exid->spo_must_allow[1],
4382 exid->spo_must_allow[2]);
bac966d6
BF		 4383 if (nfserr)
4384 return nfserr;
57266a6e
BF		 4385 break;
4386 default:
4387 WARN_ON_ONCE(1);
4388 }
0733d213 4389
d0a381dd 4390 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 4391 8 /* so_minor_id */ +
4392 4 /* so_major_id.len */ +
4393 (XDR_QUADLEN(major_id_sz) * 4) +
4394 4 /* eir_server_scope.len */ +
4395 (XDR_QUADLEN(server_scope_sz) * 4) +
4396 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 4397 if (!p)
4398 return nfserr_resource;
a8bb84bc 4399
0733d213 4400 /* The server_owner struct */
b64c7f3b 4401 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 4402 /* major id */
0c0c267b 4403 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 4404
4405 /* Server scope */
0c0c267b 4406 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 4407
4408 /* Implementation id */
c373b0a4 4409 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 4410 return 0;
2db134eb
AA		 4411}
4412
4413static __be32
57b7b43b 4414nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4415 struct nfsd4_create_session *sess)
4416{
bddfdbcd 4417 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4418 __be32 *p;
ec6b5d7b 4419
d0a381dd
BF		 4420 p = xdr_reserve_space(xdr, 24);
4421 if (!p)
4422 return nfserr_resource;
0c0c267b
BF		 4423 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4424 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4425 *p++ = cpu_to_be32(sess->seqid);
4426 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 4427
d0a381dd
BF		 4428 p = xdr_reserve_space(xdr, 28);
4429 if (!p)
4430 return nfserr_resource;
c373b0a4
BF		 4431 *p++ = cpu_to_be32(0); /* headerpadsz */
4432 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4433 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4434 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4435 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4436 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4437 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4438
4439 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 4440 p = xdr_reserve_space(xdr, 4);
4441 if (!p)
4442 return nfserr_resource;
c373b0a4 4443 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 4444 }
4445
d0a381dd
BF		 4446 p = xdr_reserve_space(xdr, 28);
4447 if (!p)
4448 return nfserr_resource;
c373b0a4
BF		 4449 *p++ = cpu_to_be32(0); /* headerpadsz */
4450 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4451 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4452 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4453 *p++ = cpu_to_be32(sess->back_channel.maxops);
4454 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4455 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4456
4457 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 4458 p = xdr_reserve_space(xdr, 4);
4459 if (!p)
4460 return nfserr_resource;
c373b0a4 4461 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 4462 }
4463 return 0;
2db134eb
AA		 4464}
4465
c47d832b 4466static __be32
57b7b43b 4467nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4468 struct nfsd4_sequence *seq)
4469{
bddfdbcd 4470 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4471 __be32 *p;
b85d4c01 4472
d0a381dd
BF		 4473 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4474 if (!p)
4475 return nfserr_resource;
0c0c267b
BF		 4476 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4477 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4478 *p++ = cpu_to_be32(seq->seqid);
4479 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 4480 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 4481 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4482 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4483 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 4484
f5236013 4485 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 4486 return 0;
2db134eb
AA		 4487}
4488
2355c596 4489static __be32
57b7b43b 4490nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 4491 struct nfsd4_test_stateid *test_stateid)
4492{
bddfdbcd 4493 struct xdr_stream *xdr = resp->xdr;
03cfb420 4494 struct nfsd4_test_stateid_id *stateid, *next;
17456804 4495 __be32 *p;
17456804 4496
d0a381dd
BF		 4497 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4498 if (!p)
4499 return nfserr_resource;
17456804 4500 *p++ = htonl(test_stateid->ts_num_ids);
17456804 4501
03cfb420 4502 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 4503 *p++ = stateid->ts_id_status;
17456804 4504 }
17456804 4505
bac966d6 4506 return 0;
17456804
BS		 4507}
4508
9cf514cc
CH		 4509#ifdef CONFIG_NFSD_PNFS
4510static __be32
4511nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4512 struct nfsd4_getdeviceinfo *gdev)
4513{
bddfdbcd 4514 struct xdr_stream *xdr = resp->xdr;
f961e3f2 4515 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4516 u32 starting_len = xdr->buf->len, needed_len;
4517 __be32 *p;
4518
9cf514cc
CH		 4519 p = xdr_reserve_space(xdr, 4);
4520 if (!p)
bac966d6 4521 return nfserr_resource;
9cf514cc
CH		 4522
4523 *p++ = cpu_to_be32(gdev->gd_layout_type);
4524
4525 /* If maxcount is 0 then just update notifications */
4526 if (gdev->gd_maxcount != 0) {
f961e3f2 4527 ops = nfsd4_layout_ops[gdev->gd_layout_type];
9cf514cc
CH		 4528 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4529 if (nfserr) {
4530 /*
4531 * We don't bother to burden the layout drivers with
4532 * enforcing gd_maxcount, just tell the client to
4533 * come back with a bigger buffer if it's not enough.
4534 */
4535 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4536 goto toosmall;
bac966d6 4537 return nfserr;
9cf514cc
CH		 4538 }
4539 }
4540
9cf514cc
CH		 4541 if (gdev->gd_notify_types) {
4542 p = xdr_reserve_space(xdr, 4 + 4);
4543 if (!p)
bac966d6 4544 return nfserr_resource;
9cf514cc
CH		 4545 *p++ = cpu_to_be32(1); /* bitmap length */
4546 *p++ = cpu_to_be32(gdev->gd_notify_types);
4547 } else {
4548 p = xdr_reserve_space(xdr, 4);
4549 if (!p)
bac966d6 4550 return nfserr_resource;
9cf514cc
CH		 4551 *p++ = 0;
4552 }
4553
bac966d6 4554 return 0;
9cf514cc
CH		 4555toosmall:
4556 dprintk("%s: maxcount too small\n", __func__);
4557 needed_len = xdr->buf->len + 4 /* notifications */;
4558 xdr_truncate_encode(xdr, starting_len);
4559 p = xdr_reserve_space(xdr, 4);
bac966d6
BF		 4560 if (!p)
4561 return nfserr_resource;
4562 *p++ = cpu_to_be32(needed_len);
4563 return nfserr_toosmall;
9cf514cc
CH		 4564}
4565
4566static __be32
4567nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4568 struct nfsd4_layoutget *lgp)
4569{
bddfdbcd 4570 struct xdr_stream *xdr = resp->xdr;
f961e3f2 4571 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4572 __be32 *p;
4573
9cf514cc
CH		 4574 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4575 if (!p)
bac966d6 4576 return nfserr_resource;
9cf514cc
CH		 4577
4578 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4579 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4580 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4581 sizeof(stateid_opaque_t));
4582
4583 *p++ = cpu_to_be32(1); /* we always return a single layout */
4584 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4585 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4586 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4587 *p++ = cpu_to_be32(lgp->lg_layout_type);
4588
f961e3f2 4589 ops = nfsd4_layout_ops[lgp->lg_layout_type];
bac966d6 4590 return ops->encode_layoutget(xdr, lgp);
9cf514cc
CH		 4591}
4592
4593static __be32
4594nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4595 struct nfsd4_layoutcommit *lcp)
4596{
bddfdbcd 4597 struct xdr_stream *xdr = resp->xdr;
9cf514cc
CH		 4598 __be32 *p;
4599
9cf514cc
CH		 4600 p = xdr_reserve_space(xdr, 4);
4601 if (!p)
4602 return nfserr_resource;
4603 *p++ = cpu_to_be32(lcp->lc_size_chg);
4604 if (lcp->lc_size_chg) {
4605 p = xdr_reserve_space(xdr, 8);
4606 if (!p)
4607 return nfserr_resource;
4608 p = xdr_encode_hyper(p, lcp->lc_newsize);
4609 }
4610
bac966d6 4611 return 0;
9cf514cc
CH		 4612}
4613
4614static __be32
4615nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4616 struct nfsd4_layoutreturn *lrp)
4617{
bddfdbcd 4618 struct xdr_stream *xdr = resp->xdr;
9cf514cc
CH		 4619 __be32 *p;
4620
9cf514cc
CH		 4621 p = xdr_reserve_space(xdr, 4);
4622 if (!p)
4623 return nfserr_resource;
4624 *p++ = cpu_to_be32(lrp->lrs_present);
4625 if (lrp->lrs_present)
376675da 4626 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
bac966d6 4627 return 0;
9cf514cc
CH		 4628}
4629#endif /* CONFIG_NFSD_PNFS */
4630
29ae7f9d 4631static __be32
e0639dc5
OK		 4632nfsd42_encode_write_res(struct nfsd4_compoundres *resp,
4633 struct nfsd42_write_res *write, bool sync)
29ae7f9d
AS		 4634{
4635 __be32 *p;
bddfdbcd 4636 p = xdr_reserve_space(resp->xdr, 4);
e0639dc5
OK		 4637 if (!p)
4638 return nfserr_resource;
29ae7f9d 4639
e0639dc5
OK		 4640 if (sync)
4641 *p++ = cpu_to_be32(0);
4642 else {
4643 __be32 nfserr;
4644 *p++ = cpu_to_be32(1);
bddfdbcd 4645 nfserr = nfsd4_encode_stateid(resp->xdr, &write->cb_stateid);
e0639dc5
OK		 4646 if (nfserr)
4647 return nfserr;
4648 }
bddfdbcd 4649 p = xdr_reserve_space(resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE);
29ae7f9d
AS		 4650 if (!p)
4651 return nfserr_resource;
4652
29ae7f9d
AS		 4653 p = xdr_encode_hyper(p, write->wr_bytes_written);
4654 *p++ = cpu_to_be32(write->wr_stable_how);
4655 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4656 NFS4_VERIFIER_SIZE);
4657 return nfs_ok;
4658}
4659
51911868
OK		 4660static __be32
4661nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns)
4662{
bddfdbcd 4663 struct xdr_stream *xdr = resp->xdr;
51911868
OK		 4664 struct nfs42_netaddr *addr;
4665 __be32 *p;
4666
4667 p = xdr_reserve_space(xdr, 4);
4668 *p++ = cpu_to_be32(ns->nl4_type);
4669
4670 switch (ns->nl4_type) {
4671 case NL4_NETADDR:
4672 addr = &ns->u.nl4_addr;
4673
4674 /* netid_len, netid, uaddr_len, uaddr (port included
4675 * in RPCBIND_MAXUADDRLEN)
4676 */
4677 p = xdr_reserve_space(xdr,
4678 4 /* netid len */ +
4679 (XDR_QUADLEN(addr->netid_len) * 4) +
4680 4 /* uaddr len */ +
4681 (XDR_QUADLEN(addr->addr_len) * 4));
4682 if (!p)
4683 return nfserr_resource;
4684
4685 *p++ = cpu_to_be32(addr->netid_len);
4686 p = xdr_encode_opaque_fixed(p, addr->netid,
4687 addr->netid_len);
4688 *p++ = cpu_to_be32(addr->addr_len);
4689 p = xdr_encode_opaque_fixed(p, addr->addr,
4690 addr->addr_len);
4691 break;
4692 default:
4693 WARN_ON_ONCE(ns->nl4_type != NL4_NETADDR);
4694 return nfserr_inval;
4695 }
4696
4697 return 0;
4698}
4699
29ae7f9d
AS		 4700static __be32
4701nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4702 struct nfsd4_copy *copy)
4703{
4704 __be32 *p;
4705
e0639dc5 4706 nfserr = nfsd42_encode_write_res(resp, &copy->cp_res,
1913cdf5 4707 nfsd4_copy_is_sync(copy));
bac966d6
BF		 4708 if (nfserr)
4709 return nfserr;
29ae7f9d 4710
bddfdbcd 4711 p = xdr_reserve_space(resp->xdr, 4 + 4);
edcc8452 4712 *p++ = xdr_one; /* cr_consecutive */
1913cdf5 4713 *p = nfsd4_copy_is_sync(copy) ? xdr_one : xdr_zero;
bac966d6 4714 return 0;
29ae7f9d
AS		 4715}
4716
6308bc98
OK		 4717static __be32
4718nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
4719 struct nfsd4_offload_status *os)
4720{
bddfdbcd 4721 struct xdr_stream *xdr = resp->xdr;
6308bc98
OK		 4722 __be32 *p;
4723
4724 p = xdr_reserve_space(xdr, 8 + 4);
4725 if (!p)
4726 return nfserr_resource;
4727 p = xdr_encode_hyper(p, os->count);
4728 *p++ = cpu_to_be32(0);
528b8493
AS		 4729 return nfserr;
4730}
4731
4732static __be32
4733nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp,
4734 struct nfsd4_read *read,
9f0b5792
AS		 4735 unsigned long *maxcount, u32 *eof,
4736 loff_t *pos)
528b8493 4737{
bddfdbcd 4738 struct xdr_stream *xdr = resp->xdr;
528b8493
AS		 4739 struct file *file = read->rd_nf->nf_file;
4740 int starting_len = xdr->buf->len;
9f0b5792 4741 loff_t hole_pos;
528b8493
AS		 4742 __be32 nfserr;
4743 __be32 *p, tmp;
4744 __be64 tmp64;
4745
9f0b5792 4746 hole_pos = pos ? *pos : vfs_llseek(file, read->rd_offset, SEEK_HOLE);
2db27992 4747 if (hole_pos > read->rd_offset)
278765ea
AS		 4748 *maxcount = min_t(unsigned long, *maxcount, hole_pos - read->rd_offset);
4749 *maxcount = min_t(unsigned long, *maxcount, (xdr->buf->buflen - xdr->buf->len));
528b8493
AS		 4750
4751 /* Content type, offset, byte count */
4752 p = xdr_reserve_space(xdr, 4 + 8 + 4);
4753 if (!p)
4754 return nfserr_resource;
4755
278765ea 4756 read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, *maxcount);
528b8493
AS		 4757 if (read->rd_vlen < 0)
4758 return nfserr_resource;
4759
4760 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
278765ea 4761 resp->rqstp->rq_vec, read->rd_vlen, maxcount, eof);
528b8493
AS		 4762 if (nfserr)
4763 return nfserr;
72d78717 4764 xdr_truncate_encode(xdr, starting_len + 16 + xdr_align_size(*maxcount));
528b8493
AS		 4765
4766 tmp = htonl(NFS4_CONTENT_DATA);
4767 write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
4768 tmp64 = cpu_to_be64(read->rd_offset);
4769 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp64, 8);
278765ea 4770 tmp = htonl(*maxcount);
528b8493 4771 write_bytes_to_xdr_buf(xdr->buf, starting_len + 12, &tmp, 4);
72d78717
TM		 4772
4773 tmp = xdr_zero;
4774 write_bytes_to_xdr_buf(xdr->buf, starting_len + 16 + *maxcount, &tmp,
4775 xdr_pad_size(*maxcount));
528b8493
AS		 4776 return nfs_ok;
4777}
4778
2db27992
AS		 4779static __be32
4780nfsd4_encode_read_plus_hole(struct nfsd4_compoundres *resp,
4781 struct nfsd4_read *read,
278765ea 4782 unsigned long *maxcount, u32 *eof)
2db27992
AS		 4783{
4784 struct file *file = read->rd_nf->nf_file;
278765ea 4785 loff_t data_pos = vfs_llseek(file, read->rd_offset, SEEK_DATA);
9f0b5792 4786 loff_t f_size = i_size_read(file_inode(file));
278765ea 4787 unsigned long count;
2db27992
AS		 4788 __be32 *p;
4789
278765ea 4790 if (data_pos == -ENXIO)
9f0b5792
AS		 4791 data_pos = f_size;
4792 else if (data_pos <= read->rd_offset || (data_pos < f_size && data_pos % PAGE_SIZE))
4793 return nfsd4_encode_read_plus_data(resp, read, maxcount, eof, &f_size);
278765ea
AS		 4794 count = data_pos - read->rd_offset;
4795
2db27992 4796 /* Content type, offset, byte count */
bddfdbcd 4797 p = xdr_reserve_space(resp->xdr, 4 + 8 + 8);
2db27992
AS		 4798 if (!p)
4799 return nfserr_resource;
4800
4801 *p++ = htonl(NFS4_CONTENT_HOLE);
1e37d0e5
JC		 4802 p = xdr_encode_hyper(p, read->rd_offset);
4803 p = xdr_encode_hyper(p, count);
2db27992 4804
9f0b5792 4805 *eof = (read->rd_offset + count) >= f_size;
278765ea 4806 *maxcount = min_t(unsigned long, count, *maxcount);
2db27992
AS		 4807 return nfs_ok;
4808}
4809
528b8493
AS		 4810static __be32
4811nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr,
4812 struct nfsd4_read *read)
4813{
278765ea 4814 unsigned long maxcount, count;
bddfdbcd 4815 struct xdr_stream *xdr = resp->xdr;
528b8493
AS		 4816 struct file *file;
4817 int starting_len = xdr->buf->len;
9f0b5792 4818 int last_segment = xdr->buf->len;
528b8493
AS		 4819 int segments = 0;
4820 __be32 *p, tmp;
9f0b5792 4821 bool is_data;
2db27992 4822 loff_t pos;
528b8493
AS		 4823 u32 eof;
4824
4825 if (nfserr)
4826 return nfserr;
4827 file = read->rd_nf->nf_file;
4828
4829 /* eof flag, segment count */
4830 p = xdr_reserve_space(xdr, 4 + 4);
4831 if (!p)
4832 return nfserr_resource;
4833 xdr_commit_encode(xdr);
4834
0cb4d23a 4835 maxcount = min_t(unsigned long, read->rd_length,
528b8493 4836 (xdr->buf->buflen - xdr->buf->len));
278765ea 4837 count = maxcount;
528b8493
AS		 4838
4839 eof = read->rd_offset >= i_size_read(file_inode(file));
2db27992
AS		 4840 if (eof)
4841 goto out;
4842
9f0b5792
AS		 4843 pos = vfs_llseek(file, read->rd_offset, SEEK_HOLE);
4844 is_data = pos > read->rd_offset;
2db27992 4845
9f0b5792 4846 while (count > 0 && !eof) {
278765ea 4847 maxcount = count;
9f0b5792
AS		 4848 if (is_data)
4849 nfserr = nfsd4_encode_read_plus_data(resp, read, &maxcount, &eof,
4850 segments == 0 ? &pos : NULL);
4851 else
4852 nfserr = nfsd4_encode_read_plus_hole(resp, read, &maxcount, &eof);
278765ea
AS		 4853 if (nfserr)
4854 goto out;
4855 count -= maxcount;
4856 read->rd_offset += maxcount;
9f0b5792
AS		 4857 is_data = !is_data;
4858 last_segment = xdr->buf->len;
528b8493
AS		 4859 segments++;
4860 }
4861
2db27992 4862out:
278765ea 4863 if (nfserr && segments == 0)
528b8493
AS		 4864 xdr_truncate_encode(xdr, starting_len);
4865 else {
9f0b5792
AS		 4866 if (nfserr) {
4867 xdr_truncate_encode(xdr, last_segment);
4868 nfserr = nfs_ok;
b68f0cbd 4869 eof = 0;
9f0b5792 4870 }
b68f0cbd
TM		 4871 tmp = htonl(eof);
4872 write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
4873 tmp = htonl(segments);
4874 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
528b8493 4875 }
6308bc98
OK		 4876
4877 return nfserr;
4878}
4879
51911868
OK		 4880static __be32
4881nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr,
4882 struct nfsd4_copy_notify *cn)
4883{
bddfdbcd 4884 struct xdr_stream *xdr = resp->xdr;
51911868
OK		 4885 __be32 *p;
4886
4887 if (nfserr)
4888 return nfserr;
4889
4890 /* 8 sec, 4 nsec */
4891 p = xdr_reserve_space(xdr, 12);
4892 if (!p)
4893 return nfserr_resource;
4894
4895 /* cnr_lease_time */
4896 p = xdr_encode_hyper(p, cn->cpn_sec);
4897 *p++ = cpu_to_be32(cn->cpn_nsec);
4898
4899 /* cnr_stateid */
4900 nfserr = nfsd4_encode_stateid(xdr, &cn->cpn_cnr_stateid);
4901 if (nfserr)
4902 return nfserr;
4903
4904 /* cnr_src.nl_nsvr */
4905 p = xdr_reserve_space(xdr, 4);
4906 if (!p)
4907 return nfserr_resource;
4908
4909 *p++ = cpu_to_be32(1);
4910
09426ef2
CL		 4911 nfserr = nfsd42_encode_nl4_server(resp, cn->cpn_src);
4912 return nfserr;
51911868
OK		 4913}
4914
24bab491
AS		 4915static __be32
4916nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4917 struct nfsd4_seek *seek)
4918{
4919 __be32 *p;
4920
bddfdbcd 4921 p = xdr_reserve_space(resp->xdr, 4 + 8);
24bab491
AS		 4922 *p++ = cpu_to_be32(seek->seek_eof);
4923 p = xdr_encode_hyper(p, seek->seek_pos);
4924
bac966d6 4925 return 0;
24bab491
AS		 4926}
4927
695e12f8
BH		 4928static __be32
4929nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4930{
4931 return nfserr;
4932}
4933
23e50fe3
FL		 4934/*
4935 * Encode kmalloc-ed buffer in to XDR stream.
4936 */
b9a49237 4937static __be32
23e50fe3
FL		 4938nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen)
4939{
4940 u32 cplen;
4941 __be32 *p;
4942
4943 cplen = min_t(unsigned long, buflen,
4944 ((void *)xdr->end - (void *)xdr->p));
4945 p = xdr_reserve_space(xdr, cplen);
4946 if (!p)
4947 return nfserr_resource;
4948
4949 memcpy(p, buf, cplen);
4950 buf += cplen;
4951 buflen -= cplen;
4952
4953 while (buflen) {
4954 cplen = min_t(u32, buflen, PAGE_SIZE);
4955 p = xdr_reserve_space(xdr, cplen);
4956 if (!p)
4957 return nfserr_resource;
4958
4959 memcpy(p, buf, cplen);
4960
4961 if (cplen < PAGE_SIZE) {
4962 /*
4963 * We're done, with a length that wasn't page
4964 * aligned, so possibly not word aligned. Pad
4965 * any trailing bytes with 0.
4966 */
4967 xdr_encode_opaque_fixed(p, NULL, cplen);
4968 break;
4969 }
4970
4971 buflen -= PAGE_SIZE;
4972 buf += PAGE_SIZE;
4973 }
4974
4975 return 0;
4976}
4977
4978static __be32
4979nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
4980 struct nfsd4_getxattr *getxattr)
4981{
bddfdbcd 4982 struct xdr_stream *xdr = resp->xdr;
23e50fe3
FL		 4983 __be32 *p, err;
4984
4985 p = xdr_reserve_space(xdr, 4);
4986 if (!p)
4987 return nfserr_resource;
4988
4989 *p = cpu_to_be32(getxattr->getxa_len);
4990
4991 if (getxattr->getxa_len == 0)
4992 return 0;
4993
4994 err = nfsd4_vbuf_to_stream(xdr, getxattr->getxa_buf,
4995 getxattr->getxa_len);
4996
4997 kvfree(getxattr->getxa_buf);
4998
4999 return err;
5000}
5001
5002static __be32
5003nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5004 struct nfsd4_setxattr *setxattr)
5005{
bddfdbcd 5006 struct xdr_stream *xdr = resp->xdr;
23e50fe3
FL		 5007 __be32 *p;
5008
5009 p = xdr_reserve_space(xdr, 20);
5010 if (!p)
5011 return nfserr_resource;
5012
5013 encode_cinfo(p, &setxattr->setxa_cinfo);
5014
5015 return 0;
5016}
5017
5018/*
5019 * See if there are cookie values that can be rejected outright.
5020 */
5021static __be32
5022nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs,
5023 u32 *offsetp)
5024{
5025 u64 cookie = listxattrs->lsxa_cookie;
5026
5027 /*
5028 * If the cookie is larger than the maximum number we can fit
5029 * in either the buffer we just got back from vfs_listxattr, or,
5030 * XDR-encoded, in the return buffer, it's invalid.
5031 */
5032 if (cookie > (listxattrs->lsxa_len) / (XATTR_USER_PREFIX_LEN + 2))
5033 return nfserr_badcookie;
5034
5035 if (cookie > (listxattrs->lsxa_maxcount /
5036 (XDR_QUADLEN(XATTR_USER_PREFIX_LEN + 2) + 4)))
5037 return nfserr_badcookie;
5038
5039 *offsetp = (u32)cookie;
5040 return 0;
5041}
5042
5043static __be32
5044nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
5045 struct nfsd4_listxattrs *listxattrs)
5046{
bddfdbcd 5047 struct xdr_stream *xdr = resp->xdr;
23e50fe3
FL		 5048 u32 cookie_offset, count_offset, eof;
5049 u32 left, xdrleft, slen, count;
5050 u32 xdrlen, offset;
5051 u64 cookie;
5052 char *sp;
b9a49237 5053 __be32 status, tmp;
23e50fe3
FL		 5054 __be32 *p;
5055 u32 nuser;
5056
5057 eof = 1;
5058
5059 status = nfsd4_listxattr_validate_cookie(listxattrs, &offset);
5060 if (status)
5061 goto out;
5062
5063 /*
5064 * Reserve space for the cookie and the name array count. Record
5065 * the offsets to save them later.
5066 */
5067 cookie_offset = xdr->buf->len;
5068 count_offset = cookie_offset + 8;
5069 p = xdr_reserve_space(xdr, 12);
5070 if (!p) {
5071 status = nfserr_resource;
5072 goto out;
5073 }
5074
5075 count = 0;
5076 left = listxattrs->lsxa_len;
5077 sp = listxattrs->lsxa_buf;
5078 nuser = 0;
5079
5080 xdrleft = listxattrs->lsxa_maxcount;
5081
5082 while (left > 0 && xdrleft > 0) {
5083 slen = strlen(sp);
5084
5085 /*
4cce11fa 5086 * Check if this is a "user." attribute, skip it if not.
23e50fe3
FL		 5087 */
5088 if (strncmp(sp, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
5089 goto contloop;
5090
5091 slen -= XATTR_USER_PREFIX_LEN;
5092 xdrlen = 4 + ((slen + 3) & ~3);
5093 if (xdrlen > xdrleft) {
5094 if (count == 0) {
5095 /*
5096 * Can't even fit the first attribute name.
5097 */
5098 status = nfserr_toosmall;
5099 goto out;
5100 }
5101 eof = 0;
5102 goto wreof;
5103 }
5104
5105 left -= XATTR_USER_PREFIX_LEN;
5106 sp += XATTR_USER_PREFIX_LEN;
5107 if (nuser++ < offset)
5108 goto contloop;
5109
5110
5111 p = xdr_reserve_space(xdr, xdrlen);
5112 if (!p) {
5113 status = nfserr_resource;
5114 goto out;
5115 }
5116
e2a1840e 5117 xdr_encode_opaque(p, sp, slen);
23e50fe3
FL		 5118
5119 xdrleft -= xdrlen;
5120 count++;
5121contloop:
5122 sp += slen + 1;
5123 left -= slen + 1;
5124 }
5125
5126 /*
5127 * If there were user attributes to copy, but we didn't copy
5128 * any, the offset was too large (e.g. the cookie was invalid).
5129 */
5130 if (nuser > 0 && count == 0) {
5131 status = nfserr_badcookie;
5132 goto out;
5133 }
5134
5135wreof:
5136 p = xdr_reserve_space(xdr, 4);
5137 if (!p) {
5138 status = nfserr_resource;
5139 goto out;
5140 }
5141 *p = cpu_to_be32(eof);
5142
5143 cookie = offset + count;
5144
5145 write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &cookie, 8);
b9a49237
CL		 5146 tmp = cpu_to_be32(count);
5147 write_bytes_to_xdr_buf(xdr->buf, count_offset, &tmp, 4);
23e50fe3
FL		 5148out:
5149 if (listxattrs->lsxa_len)
5150 kvfree(listxattrs->lsxa_buf);
5151 return status;
5152}
5153
5154static __be32
5155nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5156 struct nfsd4_removexattr *removexattr)
5157{
bddfdbcd 5158 struct xdr_stream *xdr = resp->xdr;
23e50fe3
FL		 5159 __be32 *p;
5160
5161 p = xdr_reserve_space(xdr, 20);
5162 if (!p)
5163 return nfserr_resource;
5164
5165 p = encode_cinfo(p, &removexattr->rmxa_cinfo);
5166 return 0;
5167}
5168
695e12f8
BH		 5169typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
5170
2db134eb
AA		 5171/*
5172 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
5173 * since we don't need to filter out obsolete ops as this is
5174 * done in the decoding phase.
5175 */
c1df609d 5176static const nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 5177 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
5178 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
5179 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
5180 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
5181 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
5182 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
5183 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
5184 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
5185 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
5186 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
5187 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
5188 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
5189 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
5190 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
5191 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
5192 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 5193 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 5194 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
5195 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
5196 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
5197 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
5198 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
5199 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
5200 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
5201 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
5202 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
5203 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
5204 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
5205 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
5206 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
5207 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
5208 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
5209 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
5210 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
5211 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
5212 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
5213 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 5214
5215 /* NFSv4.1 operations */
5216 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 5217 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 5218 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
5219 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 5220 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
5221 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb 5222 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc
CH		 5223#ifdef CONFIG_NFSD_PNFS
5224 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
5225 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
5226 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
5227 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
5228 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
5229#else
2db134eb
AA		 5230 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
5231 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
5232 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
5233 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
5234 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc 5235#endif
22b6dee8 5236 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 5237 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
5238 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 5239 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 5240 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
5241 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
5242 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
87a15a80
AS		 5243
5244 /* NFSv4.2 operations */
5245 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
29ae7f9d 5246 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
51911868 5247 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_copy_notify,
87a15a80
AS		 5248 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
5249 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
5250 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
5251 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
5252 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
6308bc98 5253 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status,
528b8493 5254 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_read_plus,
24bab491 5255 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
87a15a80 5256 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
ffa0160a 5257 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
23e50fe3
FL		 5258
5259 /* RFC 8276 extended atributes operations */
5260 [OP_GETXATTR] = (nfsd4_enc)nfsd4_encode_getxattr,
5261 [OP_SETXATTR] = (nfsd4_enc)nfsd4_encode_setxattr,
5262 [OP_LISTXATTRS] = (nfsd4_enc)nfsd4_encode_listxattrs,
5263 [OP_REMOVEXATTR] = (nfsd4_enc)nfsd4_encode_removexattr,
695e12f8
BH		 5264};
5265
496c262c 5266/*
a8095f7e
BF		 5267 * Calculate whether we still have space to encode repsize bytes.
5268 * There are two considerations:
5269 * - For NFS versions >=4.1, the size of the reply must stay within
5270 * session limits
5271 * - For all NFS versions, we must stay within limited preallocated
5272 * buffer space.
496c262c 5273 *
a8095f7e
BF		 5274 * This is called before the operation is processed, so can only provide
5275 * an upper estimate. For some nonidempotent operations (such as
5276 * getattr), it's not necessarily a problem if that estimate is wrong,
5277 * as we can fail it after processing without significant side effects.
496c262c 5278 */
a8095f7e 5279__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 5280{
67492c99 5281 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 5282 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 5283
47ee5298
BF		 5284 if (buf->len + respsize <= buf->buflen)
5285 return nfs_ok;
5286 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 5287 return nfserr_resource;
47ee5298
BF		 5288 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
5289 WARN_ON_ONCE(1);
5290 return nfserr_rep_too_big_to_cache;
ea8d7720 5291 }
47ee5298 5292 return nfserr_rep_too_big;
496c262c
AA		 5293}
5294
1da177e4
LT		 5295void
5296nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
5297{
bddfdbcd 5298 struct xdr_stream *xdr = resp->xdr;
9411b1d4 5299 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 5300 struct svc_rqst *rqstp = resp->rqstp;
34b1744c 5301 const struct nfsd4_operation *opdesc = op->opdesc;
082d4bd7 5302 int post_err_offset;
07d1f802 5303 nfsd4_enc encoder;
bc749ca4 5304 __be32 *p;
1da177e4 5305
d0a381dd
BF		 5306 p = xdr_reserve_space(xdr, 8);
5307 if (!p) {
5308 WARN_ON_ONCE(1);
5309 return;
5310 }
c373b0a4 5311 *p++ = cpu_to_be32(op->opnum);
082d4bd7 5312 post_err_offset = xdr->buf->len;
1da177e4 5313
695e12f8
BH		 5314 if (op->opnum == OP_ILLEGAL)
5315 goto status;
b7571e4c
BF		 5316 if (op->status && opdesc &&
5317 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
5318 goto status;
3a237b4a 5319 BUG_ON(op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
695e12f8 5320 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 5321 encoder = nfsd4_enc_ops[op->opnum];
5322 op->status = encoder(resp, op->status, &op->u);
08281341
CL		 5323 if (op->status)
5324 trace_nfsd_compound_encode_err(rqstp, op->opnum, op->status);
34b1744c
BF		 5325 if (opdesc && opdesc->op_release)
5326 opdesc->op_release(&op->u);
2825a7f9
BF		 5327 xdr_commit_encode(xdr);
5328
067e1ace 5329 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 5330 if (!op->status) {
5331 int space_needed = 0;
5332 if (!nfsd4_last_compound_op(rqstp))
5333 space_needed = COMPOUND_ERR_SLACK_SPACE;
5334 op->status = nfsd4_check_resp_size(resp, space_needed);
5335 }
c8f13d97
BF		 5336 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
5337 struct nfsd4_slot *slot = resp->cstate.slot;
5338
5339 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
5340 op->status = nfserr_rep_too_big_to_cache;
5341 else
5342 op->status = nfserr_rep_too_big;
5343 }
07d1f802
BF		 5344 if (op->status == nfserr_resource ||
5345 op->status == nfserr_rep_too_big ||
5346 op->status == nfserr_rep_too_big_to_cache) {
5347 /*
5348 * The operation may have already been encoded or
5349 * partially encoded. No op returns anything additional
5350 * in the case of one of these three errors, so we can
5351 * just truncate back to after the status. But it's a
5352 * bug if we had to do this on a non-idempotent op:
5353 */
5354 warn_on_nonidempotent_op(op);
082d4bd7 5355 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 5356 }
9411b1d4 5357 if (so) {
082d4bd7
BF		 5358 int len = xdr->buf->len - post_err_offset;
5359
9411b1d4 5360 so->so_replay.rp_status = op->status;
082d4bd7
BF		 5361 so->so_replay.rp_buflen = len;
5362 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
5363 so->so_replay.rp_buf, len);
9411b1d4 5364 }
695e12f8 5365status:
095a764b 5366 *p = op->status;
1da177e4
LT		 5367}
5368
5369/*
5370 * Encode the reply stored in the stateowner reply cache
5371 *
5372 * XDR note: do not encode rp->rp_buflen: the buffer contains the
5373 * previously sent already encoded operation.
1da177e4
LT		 5374 */
5375void
d0a381dd 5376nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 5377{
bc749ca4 5378 __be32 *p;
1da177e4
LT		 5379 struct nfs4_replay *rp = op->replay;
5380
d0a381dd
BF		 5381 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
5382 if (!p) {
5383 WARN_ON_ONCE(1);
5384 return;
5385 }
c373b0a4 5386 *p++ = cpu_to_be32(op->opnum);
1da177e4 5387 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 5388
0c0c267b 5389 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 5390}
5391
8537488b 5392void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
1da177e4 5393{
3e98abff
BF		 5394 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5395
1da177e4
LT		 5396 if (args->ops != args->iops) {
5397 kfree(args->ops);
5398 args->ops = args->iops;
5399 }
1da177e4 5400 while (args->to_free) {
d5e23383 5401 struct svcxdr_tmpbuf *tb = args->to_free;
1da177e4 5402 args->to_free = tb->next;
1da177e4
LT		 5403 kfree(tb);
5404 }
5405}
5406
c44b31c2 5407bool
16c66364 5408nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
1da177e4 5409{
026fec7e
CH		 5410 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5411
c1346a12 5412 /* svcxdr_tmp_alloc */
1da177e4 5413 args->to_free = NULL;
c1346a12 5414
16c66364 5415 args->xdr = xdr;
1da177e4
LT		 5416 args->ops = args->iops;
5417 args->rqstp = rqstp;
5418
d9b74bda 5419 return nfsd4_decode_compound(args);
1da177e4
LT		 5420}
5421
130e2054 5422bool
fda49441 5423nfs4svc_encode_compoundres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
1da177e4 5424{
63f8de37 5425 struct nfsd4_compoundres *resp = rqstp->rq_resp;
fda49441
CL		 5426 struct xdr_buf *buf = xdr->buf;
5427 __be32 *p;
6ac90391
BF		 5428
5429 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
5430 buf->tail[0].iov_len);
dd97fdde 5431
3b0ebb25
CL		 5432 /*
5433 * Send buffer space for the following items is reserved
5434 * at the top of nfsd4_proc_compound().
5435 */
5436 p = resp->statusp;
5437
5438 *p++ = resp->cstate.status;
cc028a10 5439
fda49441 5440 rqstp->rq_next_page = xdr->page_ptr + 1;
2825a7f9 5441
1da177e4
LT		 5442 *p++ = htonl(resp->taglen);
5443 memcpy(p, resp->tag, resp->taglen);
5444 p += XDR_QUADLEN(resp->taglen);
5445 *p++ = htonl(resp->opcnt);
5446
b607664e 5447 nfsd4_sequence_done(resp);
130e2054 5448 return true;
1da177e4 5449}
Michael's Linux tree.