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NFSD: Clean up SPLICE_OK in nfsd4_encode_read()
[linux-block.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)
1813 return nfserrno(-ENOMEM); /* XXX: not jukebox? */
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{
84e1b21d 1899 struct nl4_server *ns_dummy;
e8febea7
CL		 1900 u32 consecutive, i, count;
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;
1918 if (xdr_stream_decode_u32(argp->xdr, &copy->cp_synchronous) < 0)
1919 return nfserr_bad_xdr;
29ae7f9d 1920
e8febea7
CL		 1921 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1922 return nfserr_bad_xdr;
84e1b21d
OK		 1923 copy->cp_intra = false;
1924 if (count == 0) { /* intra-server copy */
1925 copy->cp_intra = true;
e8febea7 1926 return nfs_ok;
84e1b21d
OK		 1927 }
1928
e8febea7 1929 /* decode all the supplied server addresses but use only the first */
84e1b21d
OK		 1930 status = nfsd4_decode_nl4_server(argp, &copy->cp_src);
1931 if (status)
1932 return status;
1933
1934 ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
1935 if (ns_dummy == NULL)
e8febea7 1936 return nfserrno(-ENOMEM); /* XXX: jukebox? */
84e1b21d
OK		 1937 for (i = 0; i < count - 1; i++) {
1938 status = nfsd4_decode_nl4_server(argp, ns_dummy);
1939 if (status) {
1940 kfree(ns_dummy);
1941 return status;
1942 }
1943 }
1944 kfree(ns_dummy);
29ae7f9d 1945
e8febea7 1946 return nfs_ok;
29ae7f9d
AS		 1947}
1948
51911868
OK		 1949static __be32
1950nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
1951 struct nfsd4_copy_notify *cn)
1952{
5aff7d08 1953 __be32 status;
51911868 1954
f9a953fb 1955 status = nfsd4_decode_stateid4(argp, &cn->cpn_src_stateid);
51911868
OK		 1956 if (status)
1957 return status;
1958 return nfsd4_decode_nl4_server(argp, &cn->cpn_dst);
1959}
1960
f9a953fb
CL		 1961static __be32
1962nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
1963 struct nfsd4_offload_status *os)
1964{
2846bb05 1965 return nfsd4_decode_stateid4(argp, &os->stateid);
f9a953fb
CL		 1966}
1967
24bab491
AS		 1968static __be32
1969nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1970{
9d32b412 1971 __be32 status;
24bab491 1972
9d32b412 1973 status = nfsd4_decode_stateid4(argp, &seek->seek_stateid);
24bab491
AS		 1974 if (status)
1975 return status;
9d32b412
CL		 1976 if (xdr_stream_decode_u64(argp->xdr, &seek->seek_offset) < 0)
1977 return nfserr_bad_xdr;
1978 if (xdr_stream_decode_u32(argp->xdr, &seek->seek_whence) < 0)
1979 return nfserr_bad_xdr;
24bab491 1980
9d32b412 1981 return nfs_ok;
24bab491
AS		 1982}
1983
3dfd0b0e
CL		 1984static __be32
1985nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1986{
1987 __be32 status;
1988
1989 status = nfsd4_decode_stateid4(argp, &clone->cl_src_stateid);
1990 if (status)
1991 return status;
1992 status = nfsd4_decode_stateid4(argp, &clone->cl_dst_stateid);
1993 if (status)
1994 return status;
1995 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_src_pos) < 0)
1996 return nfserr_bad_xdr;
1997 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_dst_pos) < 0)
1998 return nfserr_bad_xdr;
1999 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_count) < 0)
2000 return nfserr_bad_xdr;
2001
2002 return nfs_ok;
2003}
2004
23e50fe3
FL		 2005/*
2006 * XDR data that is more than PAGE_SIZE in size is normally part of a
2007 * read or write. However, the size of extended attributes is limited
2008 * by the maximum request size, and then further limited by the underlying
2009 * filesystem limits. This can exceed PAGE_SIZE (currently, XATTR_SIZE_MAX
2010 * is 64k). Since there is no kvec- or page-based interface to xattrs,
2011 * and we're not dealing with contiguous pages, we need to do some copying.
2012 */
2013
2014/*
c1346a12 2015 * Decode data into buffer.
23e50fe3
FL		 2016 */
2017static __be32
c1346a12
CL		 2018nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct xdr_buf *xdr,
2019 char **bufp, u32 buflen)
23e50fe3 2020{
c1346a12
CL		 2021 struct page **pages = xdr->pages;
2022 struct kvec *head = xdr->head;
23e50fe3
FL		 2023 char *tmp, *dp;
2024 u32 len;
2025
2026 if (buflen <= head->iov_len) {
2027 /*
2028 * We're in luck, the head has enough space. Just return
2029 * the head, no need for copying.
2030 */
2031 *bufp = head->iov_base;
2032 return 0;
2033 }
2034
2035 tmp = svcxdr_tmpalloc(argp, buflen);
2036 if (tmp == NULL)
2037 return nfserr_jukebox;
2038
2039 dp = tmp;
2040 memcpy(dp, head->iov_base, head->iov_len);
2041 buflen -= head->iov_len;
2042 dp += head->iov_len;
2043
2044 while (buflen > 0) {
2045 len = min_t(u32, buflen, PAGE_SIZE);
2046 memcpy(dp, page_address(*pages), len);
2047
2048 buflen -= len;
2049 dp += len;
2050 pages++;
2051 }
2052
2053 *bufp = tmp;
2054 return 0;
2055}
2056
2057/*
2058 * Get a user extended attribute name from the XDR buffer.
2059 * It will not have the "user." prefix, so prepend it.
2060 * Lastly, check for nul characters in the name.
2061 */
2062static __be32
2063nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep)
2064{
23e50fe3
FL		 2065 char *name, *sp, *dp;
2066 u32 namelen, cnt;
830c7150 2067 __be32 *p;
23e50fe3 2068
830c7150
CL		 2069 if (xdr_stream_decode_u32(argp->xdr, &namelen) < 0)
2070 return nfserr_bad_xdr;
23e50fe3
FL		 2071 if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN))
2072 return nfserr_nametoolong;
23e50fe3 2073 if (namelen == 0)
830c7150
CL		 2074 return nfserr_bad_xdr;
2075 p = xdr_inline_decode(argp->xdr, namelen);
2076 if (!p)
2077 return nfserr_bad_xdr;
23e50fe3
FL		 2078 name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1);
2079 if (!name)
2080 return nfserr_jukebox;
23e50fe3
FL		 2081 memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2082
2083 /*
2084 * Copy the extended attribute name over while checking for 0
2085 * characters.
2086 */
2087 sp = (char *)p;
2088 dp = name + XATTR_USER_PREFIX_LEN;
2089 cnt = namelen;
2090
2091 while (cnt-- > 0) {
2092 if (*sp == '\0')
830c7150 2093 return nfserr_bad_xdr;
23e50fe3
FL		 2094 *dp++ = *sp++;
2095 }
2096 *dp = '\0';
2097
2098 *namep = name;
2099
830c7150 2100 return nfs_ok;
23e50fe3
FL		 2101}
2102
2103/*
2104 * A GETXATTR op request comes without a length specifier. We just set the
2105 * maximum length for the reply based on XATTR_SIZE_MAX and the maximum
2106 * channel reply size. nfsd_getxattr will probe the length of the xattr,
2107 * check it against getxa_len, and allocate + return the value.
2108 */
2109static __be32
2110nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp,
2111 struct nfsd4_getxattr *getxattr)
2112{
2113 __be32 status;
2114 u32 maxcount;
2115
2116 status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name);
2117 if (status)
2118 return status;
2119
2120 maxcount = svc_max_payload(argp->rqstp);
2121 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2122
2123 getxattr->getxa_len = maxcount;
2124
2125 return status;
2126}
2127
2128static __be32
2129nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp,
2130 struct nfsd4_setxattr *setxattr)
2131{
23e50fe3 2132 u32 flags, maxcount, size;
403366a7 2133 __be32 status;
23e50fe3 2134
403366a7
CL		 2135 if (xdr_stream_decode_u32(argp->xdr, &flags) < 0)
2136 return nfserr_bad_xdr;
23e50fe3
FL		 2137
2138 if (flags > SETXATTR4_REPLACE)
2139 return nfserr_inval;
2140 setxattr->setxa_flags = flags;
2141
2142 status = nfsd4_decode_xattr_name(argp, &setxattr->setxa_name);
2143 if (status)
2144 return status;
2145
2146 maxcount = svc_max_payload(argp->rqstp);
2147 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2148
403366a7
CL		 2149 if (xdr_stream_decode_u32(argp->xdr, &size) < 0)
2150 return nfserr_bad_xdr;
23e50fe3
FL		 2151 if (size > maxcount)
2152 return nfserr_xattr2big;
2153
2154 setxattr->setxa_len = size;
2155 if (size > 0) {
c1346a12 2156 struct xdr_buf payload;
23e50fe3 2157
c1346a12 2158 if (!xdr_stream_subsegment(argp->xdr, &payload, size))
403366a7 2159 return nfserr_bad_xdr;
c1346a12
CL		 2160 status = nfsd4_vbuf_from_vector(argp, &payload,
2161 &setxattr->setxa_buf, size);
23e50fe3
FL		 2162 }
2163
403366a7 2164 return nfs_ok;
23e50fe3
FL		 2165}
2166
2167static __be32
2168nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp,
2169 struct nfsd4_listxattrs *listxattrs)
2170{
23e50fe3
FL		 2171 u32 maxcount;
2172
2212036c
CL		 2173 if (xdr_stream_decode_u64(argp->xdr, &listxattrs->lsxa_cookie) < 0)
2174 return nfserr_bad_xdr;
23e50fe3
FL		 2175
2176 /*
2177 * If the cookie is too large to have even one user.x attribute
2178 * plus trailing '\0' left in a maximum size buffer, it's invalid.
2179 */
2180 if (listxattrs->lsxa_cookie >=
2181 (XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2)))
2182 return nfserr_badcookie;
2183
2212036c
CL		 2184 if (xdr_stream_decode_u32(argp->xdr, &maxcount) < 0)
2185 return nfserr_bad_xdr;
23e50fe3
FL		 2186 if (maxcount < 8)
2187 /* Always need at least 2 words (length and one character) */
2188 return nfserr_inval;
2189
2190 maxcount = min(maxcount, svc_max_payload(argp->rqstp));
2191 listxattrs->lsxa_maxcount = maxcount;
2192
2212036c 2193 return nfs_ok;
23e50fe3
FL		 2194}
2195
2196static __be32
2197nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp,
2198 struct nfsd4_removexattr *removexattr)
2199{
2200 return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name);
2201}
2202
347e0ad9
BH		 2203static __be32
2204nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
2205{
2206 return nfs_ok;
2207}
2208
3c375c6f
BH		 2209static __be32
2210nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
2211{
1e685ec2 2212 return nfserr_notsupp;
3c375c6f
BH		 2213}
2214
347e0ad9
BH		 2215typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
2216
c1df609d 2217static const nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 2218 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
2219 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
2220 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
2221 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
2222 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
2223 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
2224 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
2225 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
2226 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
2227 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
2228 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
2229 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
2230 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
2231 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
2232 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2233 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
2234 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
2235 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
2236 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
2237 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 2238 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 2239 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
2240 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
2241 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
2242 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
2243 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
2244 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
2245 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
2246 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
2247 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
2248 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
2249 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
2250 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
2251 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
2252 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2253 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
2254 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 2255
2256 /* new operations for NFSv4.1 */
cb73a9f4 2257 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 2258 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 2259 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
2260 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
2261 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 2262 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae 2263 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc
CH		 2264#ifdef CONFIG_NFSD_PNFS
2265 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
2266 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2267 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
2268 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
2269 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
2270#else
9064caae
RD		 2271 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
2272 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2273 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
2274 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
2275 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc 2276#endif
04f4ad16 2277 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 2278 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
2279 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 2280 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 2281 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 2282 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 2283 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
87a15a80
AS		 2284
2285 /* new operations for NFSv4.2 */
95d871f0 2286 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
29ae7f9d 2287 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
51911868 2288 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_copy_notify,
b0cb9085 2289 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
87a15a80
AS		 2290 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
2291 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
2292 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
885e2bf3 2293 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status,
6308bc98 2294 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status,
528b8493 2295 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_read,
24bab491 2296 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
87a15a80 2297 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
ffa0160a 2298 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
23e50fe3
FL		 2299 /* RFC 8276 extended atributes operations */
2300 [OP_GETXATTR] = (nfsd4_dec)nfsd4_decode_getxattr,
2301 [OP_SETXATTR] = (nfsd4_dec)nfsd4_decode_setxattr,
2302 [OP_LISTXATTRS] = (nfsd4_dec)nfsd4_decode_listxattrs,
2303 [OP_REMOVEXATTR] = (nfsd4_dec)nfsd4_decode_removexattr,
2db134eb
AA		 2304};
2305
e1a90ebd
AS		 2306static inline bool
2307nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
2308{
8217d146 2309 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 2310 return false;
8217d146 2311 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 2312 return false;
8217d146
AS		 2313 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
2314 return false;
2315 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 2316 return false;
2317 return true;
2318}
f2feb96b 2319
c44b31c2 2320static bool
1da177e4
LT		 2321nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
2322{
1da177e4 2323 struct nfsd4_op *op;
1091006c 2324 bool cachethis = false;
a5cddc88
BF		 2325 int auth_slack= argp->rqstp->rq_auth_slack;
2326 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 2327 int readcount = 0;
2328 int readbytes = 0;
d9b74bda 2329 __be32 *p;
1da177e4
LT		 2330 int i;
2331
d9b74bda 2332 if (xdr_stream_decode_u32(argp->xdr, &argp->taglen) < 0)
c44b31c2 2333 return false;
d9b74bda
CL		 2334 max_reply += XDR_UNIT;
2335 argp->tag = NULL;
2336 if (unlikely(argp->taglen)) {
2337 if (argp->taglen > NFSD4_MAX_TAGLEN)
c44b31c2 2338 return false;
d9b74bda
CL		 2339 p = xdr_inline_decode(argp->xdr, argp->taglen);
2340 if (!p)
c44b31c2 2341 return false;
7b723008 2342 argp->tag = svcxdr_savemem(argp, p, argp->taglen);
d9b74bda 2343 if (!argp->tag)
c44b31c2 2344 return false;
d9b74bda
CL		 2345 max_reply += xdr_align_size(argp->taglen);
2346 }
2347
2348 if (xdr_stream_decode_u32(argp->xdr, &argp->minorversion) < 0)
c44b31c2 2349 return false;
d9b74bda 2350 if (xdr_stream_decode_u32(argp->xdr, &argp->opcnt) < 0)
c44b31c2 2351 return false;
d9b74bda 2352
0078117c
BF		 2353 /*
2354 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
2355 * here, so we return success at the xdr level so that
2356 * nfsd4_proc can handle this is an NFS-level error.
2357 */
2358 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
c44b31c2 2359 return true;
1da177e4 2360
e8c96f8c 2361 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
5d6031ca 2362 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1da177e4
LT		 2363 if (!argp->ops) {
2364 argp->ops = argp->iops;
817cb9d4 2365 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
c44b31c2 2366 return false;
1da177e4
LT		 2367 }
2368 }
2369
e1a90ebd 2370 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 2371 argp->opcnt = 0;
2372
1da177e4
LT		 2373 for (i = 0; i < argp->opcnt; i++) {
2374 op = &argp->ops[i];
2375 op->replay = NULL;
2376
3a237b4a 2377 if (xdr_stream_decode_u32(argp->xdr, &op->opnum) < 0)
c44b31c2 2378 return false;
08281341 2379 if (nfsd4_opnum_in_range(argp, op)) {
e1a90ebd 2380 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
08281341
CL		 2381 if (op->status != nfs_ok)
2382 trace_nfsd_compound_decode_err(argp->rqstp,
2383 argp->opcnt, i,
2384 op->opnum,
2385 op->status);
2386 } else {
1da177e4
LT		 2387 op->opnum = OP_ILLEGAL;
2388 op->status = nfserr_op_illegal;
1da177e4 2389 }
f4f9ef4a 2390 op->opdesc = OPDESC(op);
1091006c
BF		 2391 /*
2392 * We'll try to cache the result in the DRC if any one
2393 * op in the compound wants to be cached:
2394 */
2395 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 2396
528b8493 2397 if (op->opnum == OP_READ || op->opnum == OP_READ_PLUS) {
b0e35fda
BF		 2398 readcount++;
2399 readbytes += nfsd4_max_reply(argp->rqstp, op);
2400 } else
2401 max_reply += nfsd4_max_reply(argp->rqstp, op);
f7b43d0c 2402 /*
7323f0d2
KM		 2403 * OP_LOCK and OP_LOCKT may return a conflicting lock.
2404 * (Special case because it will just skip encoding this
2405 * if it runs out of xdr buffer space, and it is the only
2406 * operation that behaves this way.)
f7b43d0c 2407 */
7323f0d2 2408 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
f7b43d0c 2409 max_reply += NFS4_OPAQUE_LIMIT;
e372ba60
BF		 2410
2411 if (op->status) {
2412 argp->opcnt = i+1;
2413 break;
2414 }
1da177e4 2415 }
1091006c
BF		 2416 /* Sessions make the DRC unnecessary: */
2417 if (argp->minorversion)
2418 cachethis = false;
b0e35fda 2419 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 2420 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 2421
a5cddc88 2422 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
28df0988 2423 __clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
b0e35fda 2424
c44b31c2 2425 return true;
1da177e4 2426}
1da177e4 2427
b8800921
N		 2428static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
2429 struct svc_export *exp)
c654b8a9 2430{
b8800921
N		 2431 if (exp->ex_flags & NFSEXP_V4ROOT) {
2432 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
2433 *p++ = 0;
70b87f77 2434 } else
39ca1bf6 2435 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
d05d5744 2436 return p;
c654b8a9
BF		 2437}
2438
16945141
BF		 2439/*
2440 * ctime (in NFSv4, time_metadata) is not writeable, and the client
2441 * doesn't really care what resolution could theoretically be stored by
2442 * the filesystem.
2443 *
2444 * The client cares how close together changes can be while still
2445 * guaranteeing ctime changes. For most filesystems (which have
2446 * timestamps with nanosecond fields) that is limited by the resolution
2447 * of the time returned from current_time() (which I'm assuming to be
2448 * 1/HZ).
2449 */
2450static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
2451{
e4598e38 2452 struct timespec64 ts;
16945141
BF		 2453 u32 ns;
2454
2455 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
e4598e38 2456 ts = ns_to_timespec64(ns);
16945141
BF		 2457
2458 p = xdr_encode_hyper(p, ts.tv_sec);
2459 *p++ = cpu_to_be32(ts.tv_nsec);
2460
2461 return p;
2462}
2463
d05d5744 2464static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 2465{
d05d5744 2466 *p++ = cpu_to_be32(c->atomic);
b2140338
BF		 2467 p = xdr_encode_hyper(p, c->before_change);
2468 p = xdr_encode_hyper(p, c->after_change);
d05d5744 2469 return p;
c654b8a9 2470}
1da177e4 2471
81c3f413 2472/* Encode as an array of strings the string given with components
e7a0444a 2473 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 2474 */
ddd1ea56
BF		 2475static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2476 char *components, char esc_enter,
2477 char esc_exit)
81c3f413 2478{
ddd1ea56 2479 __be32 *p;
082d4bd7
BF		 2480 __be32 pathlen;
2481 int pathlen_offset;
81c3f413 2482 int strlen, count=0;
e7a0444a 2483 char *str, *end, *next;
81c3f413
BF		 2484
2485 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 2486
2487 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 2488 p = xdr_reserve_space(xdr, 4);
2489 if (!p)
81c3f413 2490 return nfserr_resource;
082d4bd7
BF		 2491 p++; /* We will fill this in with @count later */
2492
81c3f413
BF		 2493 end = str = components;
2494 while (*end) {
e7a0444a
WAA		 2495 bool found_esc = false;
2496
2497 /* try to parse as esc_start, ..., esc_end, sep */
2498 if (*str == esc_enter) {
2499 for (; *end && (*end != esc_exit); end++)
2500 /* find esc_exit or end of string */;
2501 next = end + 1;
2502 if (*end && (!*next || *next == sep)) {
2503 str++;
2504 found_esc = true;
2505 }
2506 }
2507
2508 if (!found_esc)
2509 for (; *end && (*end != sep); end++)
2510 /* find sep or end of string */;
2511
81c3f413
BF		 2512 strlen = end - str;
2513 if (strlen) {
ddd1ea56
BF		 2514 p = xdr_reserve_space(xdr, strlen + 4);
2515 if (!p)
81c3f413 2516 return nfserr_resource;
0c0c267b 2517 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 2518 count++;
2519 }
2520 else
2521 end++;
5a64e569
BC		 2522 if (found_esc)
2523 end = next;
2524
81c3f413
BF		 2525 str = end;
2526 }
bf7491f1 2527 pathlen = htonl(count);
082d4bd7 2528 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 2529 return 0;
2530}
2531
e7a0444a
WAA		 2532/* Encode as an array of strings the string given with components
2533 * separated @sep.
2534 */
ddd1ea56
BF		 2535static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2536 char *components)
e7a0444a 2537{
ddd1ea56 2538 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 2539}
2540
81c3f413
BF		 2541/*
2542 * encode a location element of a fs_locations structure
2543 */
ddd1ea56
BF		 2544static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2545 struct nfsd4_fs_location *location)
81c3f413 2546{
b37ad28b 2547 __be32 status;
81c3f413 2548
ddd1ea56 2549 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 2550 '[', ']');
81c3f413
BF		 2551 if (status)
2552 return status;
ddd1ea56 2553 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 2554 if (status)
2555 return status;
81c3f413
BF		 2556 return 0;
2557}
2558
2559/*
ed748aac 2560 * Encode a path in RFC3530 'pathname4' format
81c3f413 2561 */
ddd1ea56
BF		 2562static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2563 const struct path *root,
2564 const struct path *path)
81c3f413 2565{
301f0268 2566 struct path cur = *path;
ddd1ea56 2567 __be32 *p;
ed748aac
TM		 2568 struct dentry **components = NULL;
2569 unsigned int ncomponents = 0;
2570 __be32 err = nfserr_jukebox;
81c3f413 2571
ed748aac 2572 dprintk("nfsd4_encode_components(");
81c3f413 2573
ed748aac
TM		 2574 path_get(&cur);
2575 /* First walk the path up to the nfsd root, and store the
2576 * dentries/path components in an array.
2577 */
2578 for (;;) {
b77a4b2e 2579 if (path_equal(&cur, root))
ed748aac
TM		 2580 break;
2581 if (cur.dentry == cur.mnt->mnt_root) {
2582 if (follow_up(&cur))
2583 continue;
2584 goto out_free;
2585 }
2586 if ((ncomponents & 15) == 0) {
2587 struct dentry **new;
2588 new = krealloc(components,
2589 sizeof(*new) * (ncomponents + 16),
2590 GFP_KERNEL);
2591 if (!new)
2592 goto out_free;
2593 components = new;
2594 }
2595 components[ncomponents++] = cur.dentry;
2596 cur.dentry = dget_parent(cur.dentry);
2597 }
ddd1ea56
BF		 2598 err = nfserr_resource;
2599 p = xdr_reserve_space(xdr, 4);
2600 if (!p)
ed748aac 2601 goto out_free;
c373b0a4 2602 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 2603
2604 while (ncomponents) {
2605 struct dentry *dentry = components[ncomponents - 1];
301f0268 2606 unsigned int len;
ed748aac 2607
301f0268
AV		 2608 spin_lock(&dentry->d_lock);
2609 len = dentry->d_name.len;
ddd1ea56
BF		 2610 p = xdr_reserve_space(xdr, len + 4);
2611 if (!p) {
301f0268 2612 spin_unlock(&dentry->d_lock);
ed748aac 2613 goto out_free;
301f0268 2614 }
0c0c267b 2615 p = xdr_encode_opaque(p, dentry->d_name.name, len);
a455589f 2616 dprintk("/%pd", dentry);
301f0268 2617 spin_unlock(&dentry->d_lock);
ed748aac
TM		 2618 dput(dentry);
2619 ncomponents--;
81c3f413 2620 }
ed748aac 2621
ed748aac
TM		 2622 err = 0;
2623out_free:
2624 dprintk(")\n");
2625 while (ncomponents)
2626 dput(components[--ncomponents]);
2627 kfree(components);
2628 path_put(&cur);
2629 return err;
2630}
2631
ddd1ea56
BF		 2632static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2633 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 2634{
2635 struct svc_export *exp_ps;
2636 __be32 res;
2637
2638 exp_ps = rqst_find_fsidzero_export(rqstp);
2639 if (IS_ERR(exp_ps))
2640 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 2641 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 2642 exp_put(exp_ps);
2643 return res;
81c3f413
BF		 2644}
2645
2646/*
2647 * encode a fs_locations structure
2648 */
ddd1ea56
BF		 2649static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2650 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 2651{
b37ad28b 2652 __be32 status;
cc45f017 2653 int i;
ddd1ea56 2654 __be32 *p;
81c3f413 2655 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 2656
ddd1ea56 2657 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 2658 if (status)
2659 return status;
ddd1ea56
BF		 2660 p = xdr_reserve_space(xdr, 4);
2661 if (!p)
81c3f413 2662 return nfserr_resource;
c373b0a4 2663 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 2664 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 2665 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 2666 if (status)
2667 return status;
2668 }
81c3f413
BF		 2669 return 0;
2670}
1da177e4 2671
3d2544b1
BF		 2672static u32 nfs4_file_type(umode_t mode)
2673{
2674 switch (mode & S_IFMT) {
2675 case S_IFIFO: return NF4FIFO;
2676 case S_IFCHR: return NF4CHR;
2677 case S_IFDIR: return NF4DIR;
2678 case S_IFBLK: return NF4BLK;
2679 case S_IFLNK: return NF4LNK;
2680 case S_IFREG: return NF4REG;
2681 case S_IFSOCK: return NF4SOCK;
2682 default: return NF4BAD;
25fef48b 2683 }
3d2544b1 2684}
1da177e4 2685
b37ad28b 2686static inline __be32
ddd1ea56
BF		 2687nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2688 struct nfs4_ace *ace)
1da177e4 2689{
3554116d 2690 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 2691 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 2692 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 2693 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 2694 else
ddd1ea56 2695 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 2696}
2697
6896f15a 2698static inline __be32
8a4c3926 2699nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
6896f15a 2700{
8a4c3926
JL		 2701 __be32 *p;
2702 unsigned long i = hweight_long(layout_types);
6896f15a 2703
8a4c3926
JL		 2704 p = xdr_reserve_space(xdr, 4 + 4 * i);
2705 if (!p)
2706 return nfserr_resource;
2707
2708 *p++ = cpu_to_be32(i);
2709
2710 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2711 if (layout_types & (1 << i))
2712 *p++ = cpu_to_be32(i);
6896f15a
KM		 2713
2714 return 0;
2715}
2716
42ca0993
BF		 2717#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2718 FATTR4_WORD0_RDATTR_ERROR)
2719#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
c2227a39 2720#define WORD2_ABSENT_FS_ATTRS 0
42ca0993 2721
18032ca0
DQ		 2722#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2723static inline __be32
ddd1ea56
BF		 2724nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2725 void *context, int len)
18032ca0 2726{
ddd1ea56 2727 __be32 *p;
18032ca0 2728
ddd1ea56
BF		 2729 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2730 if (!p)
18032ca0
DQ		 2731 return nfserr_resource;
2732
2733 /*
2734 * For now we use a 0 here to indicate the null translation; in
2735 * the future we may place a call to translation code here.
2736 */
c373b0a4
BF		 2737 *p++ = cpu_to_be32(0); /* lfs */
2738 *p++ = cpu_to_be32(0); /* pi */
18032ca0 2739 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 2740 return 0;
2741}
2742#else
2743static inline __be32
ddd1ea56
BF		 2744nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2745 void *context, int len)
18032ca0
DQ		 2746{ return 0; }
2747#endif
2748
c2227a39 2749static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
42ca0993
BF		 2750{
2751 /* As per referral draft: */
2752 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2753 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2754 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2755 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2756 *rdattr_err = NFSERR_MOVED;
2757 else
2758 return nfserr_moved;
2759 }
2760 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2761 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
c2227a39 2762 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
42ca0993
BF		 2763 return 0;
2764}
1da177e4 2765
ae7095a7
BF		 2766
2767static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2768{
2769 struct path path = exp->ex_path;
2770 int err;
2771
2772 path_get(&path);
2773 while (follow_up(&path)) {
2774 if (path.dentry != path.mnt->mnt_root)
2775 break;
2776 }
a528d35e 2777 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
ae7095a7
BF		 2778 path_put(&path);
2779 return err;
2780}
2781
75976de6
KM		 2782static __be32
2783nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2784{
2785 __be32 *p;
2786
2787 if (bmval2) {
2788 p = xdr_reserve_space(xdr, 16);
2789 if (!p)
2790 goto out_resource;
2791 *p++ = cpu_to_be32(3);
2792 *p++ = cpu_to_be32(bmval0);
2793 *p++ = cpu_to_be32(bmval1);
2794 *p++ = cpu_to_be32(bmval2);
2795 } else if (bmval1) {
2796 p = xdr_reserve_space(xdr, 12);
2797 if (!p)
2798 goto out_resource;
2799 *p++ = cpu_to_be32(2);
2800 *p++ = cpu_to_be32(bmval0);
2801 *p++ = cpu_to_be32(bmval1);
2802 } else {
2803 p = xdr_reserve_space(xdr, 8);
2804 if (!p)
2805 goto out_resource;
2806 *p++ = cpu_to_be32(1);
2807 *p++ = cpu_to_be32(bmval0);
2808 }
2809
2810 return 0;
2811out_resource:
2812 return nfserr_resource;
2813}
2814
1da177e4
LT		 2815/*
2816 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2817 * ourselves.
1da177e4 2818 */
da2ebce6 2819static __be32
d5184658
BF		 2820nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2821 struct svc_export *exp,
2822 struct dentry *dentry, u32 *bmval,
406a7ea9 2823 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2824{
2825 u32 bmval0 = bmval[0];
2826 u32 bmval1 = bmval[1];
7e705706 2827 u32 bmval2 = bmval[2];
1da177e4 2828 struct kstat stat;
d50e6136 2829 struct svc_fh *tempfh = NULL;
1da177e4 2830 struct kstatfs statfs;
ab04de60 2831 __be32 *p, *attrlen_p;
1fcea5b2 2832 int starting_len = xdr->buf->len;
082d4bd7 2833 int attrlen_offset;
1da177e4
LT		 2834 u32 dummy;
2835 u64 dummy64;
42ca0993 2836 u32 rdattr_err = 0;
b37ad28b 2837 __be32 status;
b8dd7b9a 2838 int err;
1da177e4 2839 struct nfs4_acl *acl = NULL;
0ab88ca4 2840#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2841 void *context = NULL;
2842 int contextlen;
0ab88ca4 2843#endif
18032ca0 2844 bool contextsupport = false;
7e705706
AA		 2845 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2846 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2847 struct path path = {
2848 .mnt = exp->ex_path.mnt,
2849 .dentry = dentry,
2850 };
3d733711 2851 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2852
2853 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
916d2d84 2854 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
1da177e4 2855
42ca0993 2856 if (exp->ex_fslocs.migrated) {
c2227a39 2857 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
42ca0993
BF		 2858 if (status)
2859 goto out;
2860 }
2861
a528d35e 2862 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
b8dd7b9a 2863 if (err)
1da177e4 2864 goto out_nfserr;
e377a3e6
OV		 2865 if (!(stat.result_mask & STATX_BTIME))
2866 /* underlying FS does not offer btime so we can't share it */
2867 bmval1 &= ~FATTR4_WORD1_TIME_CREATE;
12337901
CH		 2868 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2869 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2870 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2871 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2872 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2873 if (err)
1da177e4
LT		 2874 goto out_nfserr;
2875 }
2876 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2877 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2878 status = nfserr_jukebox;
2879 if (!tempfh)
2880 goto out;
2881 fh_init(tempfh, NFS4_FHSIZE);
2882 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2883 if (status)
2884 goto out;
d50e6136 2885 fhp = tempfh;
1da177e4 2886 }
0c9d65e7 2887 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2888 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
0c9d65e7
AG		 2889 if (err == -EOPNOTSUPP)
2890 bmval0 &= ~FATTR4_WORD0_ACL;
2891 else if (err == -EINVAL) {
2892 status = nfserr_attrnotsupp;
2893 goto out;
2894 } else if (err != 0)
2895 goto out_nfserr;
1da177e4 2896 }
1da177e4 2897
18032ca0 2898#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
c2227a39
KM		 2899 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2900 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
32ddd944
BF		 2901 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2902 err = security_inode_getsecctx(d_inode(dentry),
18032ca0 2903 &context, &contextlen);
32ddd944
BF		 2904 else
2905 err = -EOPNOTSUPP;
18032ca0
DQ		 2906 contextsupport = (err == 0);
2907 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2908 if (err == -EOPNOTSUPP)
2909 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2910 else if (err)
2911 goto out_nfserr;
2912 }
2913 }
2914#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2915
75976de6
KM		 2916 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2917 if (status)
2918 goto out;
082d4bd7
BF		 2919
2920 attrlen_offset = xdr->buf->len;
ab04de60
CL		 2921 attrlen_p = xdr_reserve_space(xdr, XDR_UNIT);
2922 if (!attrlen_p)
ddd1ea56 2923 goto out_resource;
1da177e4
LT		 2924
2925 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
dcd20869
BF		 2926 u32 supp[3];
2927
2928 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
7e705706 2929
0c9d65e7 2930 if (!IS_POSIXACL(dentry->d_inode))
916d2d84 2931 supp[0] &= ~FATTR4_WORD0_ACL;
18032ca0 2932 if (!contextsupport)
916d2d84
BF		 2933 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2934 if (!supp[2]) {
ddd1ea56
BF		 2935 p = xdr_reserve_space(xdr, 12);
2936 if (!p)
2b44f1ba 2937 goto out_resource;
c373b0a4 2938 *p++ = cpu_to_be32(2);
916d2d84
BF		 2939 *p++ = cpu_to_be32(supp[0]);
2940 *p++ = cpu_to_be32(supp[1]);
7e705706 2941 } else {
ddd1ea56
BF		 2942 p = xdr_reserve_space(xdr, 16);
2943 if (!p)
2b44f1ba 2944 goto out_resource;
c373b0a4 2945 *p++ = cpu_to_be32(3);
916d2d84
BF		 2946 *p++ = cpu_to_be32(supp[0]);
2947 *p++ = cpu_to_be32(supp[1]);
2948 *p++ = cpu_to_be32(supp[2]);
7e705706 2949 }
1da177e4
LT		 2950 }
2951 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2952 p = xdr_reserve_space(xdr, 4);
2953 if (!p)
1da177e4 2954 goto out_resource;
3d2544b1 2955 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2956 if (dummy == NF4BAD) {
2957 status = nfserr_serverfault;
2958 goto out;
2959 }
c373b0a4 2960 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2961 }
2962 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2963 p = xdr_reserve_space(xdr, 4);
2964 if (!p)
1da177e4 2965 goto out_resource;
49640001 2966 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2967 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2968 else
c373b0a4
BF		 2969 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2970 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2971 }
2972 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2973 p = xdr_reserve_space(xdr, 8);
2974 if (!p)
1da177e4 2975 goto out_resource;
b8800921 2976 p = encode_change(p, &stat, d_inode(dentry), exp);
1da177e4
LT		 2977 }
2978 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2979 p = xdr_reserve_space(xdr, 8);
2980 if (!p)
1da177e4 2981 goto out_resource;
b64c7f3b 2982 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2983 }
2984 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2985 p = xdr_reserve_space(xdr, 4);
2986 if (!p)
1da177e4 2987 goto out_resource;
c373b0a4 2988 *p++ = cpu_to_be32(1);
1da177e4
LT		 2989 }
2990 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2991 p = xdr_reserve_space(xdr, 4);
2992 if (!p)
1da177e4 2993 goto out_resource;
c373b0a4 2994 *p++ = cpu_to_be32(1);
1da177e4
LT		 2995 }
2996 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2997 p = xdr_reserve_space(xdr, 4);
2998 if (!p)
1da177e4 2999 goto out_resource;
c373b0a4 3000 *p++ = cpu_to_be32(0);
1da177e4
LT		 3001 }
3002 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 3003 p = xdr_reserve_space(xdr, 16);
3004 if (!p)
1da177e4 3005 goto out_resource;
42ca0993 3006 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 3007 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
3008 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 3009 } else switch(fsid_source(fhp)) {
3010 case FSIDSOURCE_FSID:
b64c7f3b
BF		 3011 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
3012 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 3013 break;
3014 case FSIDSOURCE_DEV:
c373b0a4
BF		 3015 *p++ = cpu_to_be32(0);
3016 *p++ = cpu_to_be32(MAJOR(stat.dev));
3017 *p++ = cpu_to_be32(0);
3018 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 3019 break;
3020 case FSIDSOURCE_UUID:
94eb3689
KM		 3021 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
3022 EX_UUID_LEN);
af6a4e28 3023 break;
1da177e4
LT		 3024 }
3025 }
3026 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 3027 p = xdr_reserve_space(xdr, 4);
3028 if (!p)
1da177e4 3029 goto out_resource;
c373b0a4 3030 *p++ = cpu_to_be32(0);
1da177e4
LT		 3031 }
3032 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 3033 p = xdr_reserve_space(xdr, 4);
3034 if (!p)
1da177e4 3035 goto out_resource;
c373b0a4 3036 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 3037 }
3038 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 3039 p = xdr_reserve_space(xdr, 4);
3040 if (!p)
1da177e4 3041 goto out_resource;
c373b0a4 3042 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 3043 }
3044 if (bmval0 & FATTR4_WORD0_ACL) {
3045 struct nfs4_ace *ace;
1da177e4
LT		 3046
3047 if (acl == NULL) {
ddd1ea56
BF		 3048 p = xdr_reserve_space(xdr, 4);
3049 if (!p)
1da177e4
LT		 3050 goto out_resource;
3051
c373b0a4 3052 *p++ = cpu_to_be32(0);
1da177e4
LT		 3053 goto out_acl;
3054 }
ddd1ea56
BF		 3055 p = xdr_reserve_space(xdr, 4);
3056 if (!p)
1da177e4 3057 goto out_resource;
c373b0a4 3058 *p++ = cpu_to_be32(acl->naces);
1da177e4 3059
28e05dd8 3060 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 3061 p = xdr_reserve_space(xdr, 4*3);
3062 if (!p)
1da177e4 3063 goto out_resource;
c373b0a4
BF		 3064 *p++ = cpu_to_be32(ace->type);
3065 *p++ = cpu_to_be32(ace->flag);
3066 *p++ = cpu_to_be32(ace->access_mask &
3067 NFS4_ACE_MASK_ALL);
ddd1ea56 3068 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 3069 if (status)
3070 goto out;
3071 }
3072 }
3073out_acl:
3074 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 3075 p = xdr_reserve_space(xdr, 4);
3076 if (!p)
1da177e4 3077 goto out_resource;
0c9d65e7 3078 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
1da177e4
LT		 3079 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
3080 }
3081 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 3082 p = xdr_reserve_space(xdr, 4);
3083 if (!p)
1da177e4 3084 goto out_resource;
c373b0a4 3085 *p++ = cpu_to_be32(1);
1da177e4
LT		 3086 }
3087 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 3088 p = xdr_reserve_space(xdr, 4);
3089 if (!p)
1da177e4 3090 goto out_resource;
c373b0a4 3091 *p++ = cpu_to_be32(0);
1da177e4
LT		 3092 }
3093 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 3094 p = xdr_reserve_space(xdr, 4);
3095 if (!p)
1da177e4 3096 goto out_resource;
c373b0a4 3097 *p++ = cpu_to_be32(1);
1da177e4
LT		 3098 }
3099 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 3100 p = xdr_reserve_space(xdr, 4);
3101 if (!p)
1da177e4 3102 goto out_resource;
c373b0a4 3103 *p++ = cpu_to_be32(1);
1da177e4
LT		 3104 }
3105 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 3106 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
3107 if (!p)
1da177e4 3108 goto out_resource;
d8b26071 3109 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_raw,
0c0c267b 3110 fhp->fh_handle.fh_size);
1da177e4
LT		 3111 }
3112 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 3113 p = xdr_reserve_space(xdr, 8);
3114 if (!p)
1da177e4 3115 goto out_resource;
b64c7f3b 3116 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 3117 }
3118 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 3119 p = xdr_reserve_space(xdr, 8);
3120 if (!p)
1da177e4 3121 goto out_resource;
b64c7f3b 3122 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 3123 }
3124 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 3125 p = xdr_reserve_space(xdr, 8);
3126 if (!p)
1da177e4 3127 goto out_resource;
b64c7f3b 3128 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 3129 }
3130 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 3131 p = xdr_reserve_space(xdr, 8);
3132 if (!p)
1da177e4 3133 goto out_resource;
b64c7f3b 3134 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 3135 }
81c3f413 3136 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 3137 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 3138 if (status)
3139 goto out;
3140 }
1da177e4 3141 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 3142 p = xdr_reserve_space(xdr, 4);
3143 if (!p)
1da177e4 3144 goto out_resource;
c373b0a4 3145 *p++ = cpu_to_be32(1);
1da177e4
LT		 3146 }
3147 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 3148 p = xdr_reserve_space(xdr, 8);
3149 if (!p)
1da177e4 3150 goto out_resource;
b64c7f3b 3151 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 3152 }
3153 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 3154 p = xdr_reserve_space(xdr, 4);
3155 if (!p)
1da177e4 3156 goto out_resource;
c373b0a4 3157 *p++ = cpu_to_be32(255);
1da177e4
LT		 3158 }
3159 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 3160 p = xdr_reserve_space(xdr, 4);
3161 if (!p)
1da177e4 3162 goto out_resource;
c373b0a4 3163 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 3164 }
3165 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 3166 p = xdr_reserve_space(xdr, 8);
3167 if (!p)
1da177e4 3168 goto out_resource;
b64c7f3b 3169 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 3170 }
3171 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 3172 p = xdr_reserve_space(xdr, 8);
3173 if (!p)
1da177e4 3174 goto out_resource;
b64c7f3b 3175 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 3176 }
3177 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 3178 p = xdr_reserve_space(xdr, 4);
3179 if (!p)
1da177e4 3180 goto out_resource;
c373b0a4 3181 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 3182 }
3183 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 3184 p = xdr_reserve_space(xdr, 4);
3185 if (!p)
1da177e4 3186 goto out_resource;
c373b0a4 3187 *p++ = cpu_to_be32(1);
1da177e4
LT		 3188 }
3189 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 3190 p = xdr_reserve_space(xdr, 4);
3191 if (!p)
1da177e4 3192 goto out_resource;
c373b0a4 3193 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 3194 }
3195 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 3196 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 3197 if (status)
3198 goto out;
3199 }
3200 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 3201 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 3202 if (status)
3203 goto out;
3204 }
3205 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 3206 p = xdr_reserve_space(xdr, 8);
3207 if (!p)
1da177e4 3208 goto out_resource;
c373b0a4
BF		 3209 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
3210 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 3211 }
3212 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 3213 p = xdr_reserve_space(xdr, 8);
3214 if (!p)
1da177e4
LT		 3215 goto out_resource;
3216 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 3217 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3218 }
3219 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 3220 p = xdr_reserve_space(xdr, 8);
3221 if (!p)
1da177e4
LT		 3222 goto out_resource;
3223 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 3224 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3225 }
3226 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 3227 p = xdr_reserve_space(xdr, 8);
3228 if (!p)
1da177e4
LT		 3229 goto out_resource;
3230 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 3231 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3232 }
3233 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 3234 p = xdr_reserve_space(xdr, 8);
3235 if (!p)
1da177e4
LT		 3236 goto out_resource;
3237 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 3238 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3239 }
3240 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 3241 p = xdr_reserve_space(xdr, 12);
3242 if (!p)
1da177e4 3243 goto out_resource;
b64c7f3b 3244 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 3245 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 3246 }
3247 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 3248 p = xdr_reserve_space(xdr, 12);
3249 if (!p)
1da177e4 3250 goto out_resource;
16945141 3251 p = encode_time_delta(p, d_inode(dentry));
1da177e4
LT		 3252 }
3253 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 3254 p = xdr_reserve_space(xdr, 12);
3255 if (!p)
1da177e4 3256 goto out_resource;
b64c7f3b 3257 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 3258 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 3259 }
3260 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 3261 p = xdr_reserve_space(xdr, 12);
3262 if (!p)
1da177e4 3263 goto out_resource;
b64c7f3b 3264 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 3265 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4 3266 }
e377a3e6
OV		 3267 if (bmval1 & FATTR4_WORD1_TIME_CREATE) {
3268 p = xdr_reserve_space(xdr, 12);
3269 if (!p)
3270 goto out_resource;
3271 p = xdr_encode_hyper(p, (s64)stat.btime.tv_sec);
3272 *p++ = cpu_to_be32(stat.btime.tv_nsec);
3273 }
1da177e4 3274 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
0a2050d7
KM		 3275 struct kstat parent_stat;
3276 u64 ino = stat.ino;
3277
ddd1ea56
BF		 3278 p = xdr_reserve_space(xdr, 8);
3279 if (!p)
1da177e4 3280 goto out_resource;
406a7ea9
FF		 3281 /*
3282 * Get parent's attributes if not ignoring crossmount
3283 * and this is the root of a cross-mounted filesystem.
3284 */
3285 if (ignore_crossmnt == 0 &&
0a2050d7
KM		 3286 dentry == exp->ex_path.mnt->mnt_root) {
3287 err = get_parent_attributes(exp, &parent_stat);
3288 if (err)
3289 goto out_nfserr;
3290 ino = parent_stat.ino;
3291 }
3292 p = xdr_encode_hyper(p, ino);
1da177e4 3293 }
9cf514cc 3294#ifdef CONFIG_NFSD_PNFS
6896f15a 3295 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
8a4c3926 3296 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 3297 if (status)
3298 goto out;
3299 }
3300
3301 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
8a4c3926 3302 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 3303 if (status)
3304 goto out;
9cf514cc
CH		 3305 }
3306
3307 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
3308 p = xdr_reserve_space(xdr, 4);
3309 if (!p)
3310 goto out_resource;
3311 *p++ = cpu_to_be32(stat.blksize);
3312 }
3313#endif /* CONFIG_NFSD_PNFS */
8c18f205 3314 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
b26b78cb
TM		 3315 u32 supp[3];
3316
3317 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
3318 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
3319 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
3320 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
3321
3322 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
75976de6
KM		 3323 if (status)
3324 goto out;
8c18f205 3325 }
7e705706 3326
0ab88ca4 3327#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
7d580722
KM		 3328 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
3329 status = nfsd4_encode_security_label(xdr, rqstp, context,
3330 contextlen);
3331 if (status)
3332 goto out;
3333 }
0ab88ca4 3334#endif
7d580722 3335
0e885e84
FL		 3336 if (bmval2 & FATTR4_WORD2_XATTR_SUPPORT) {
3337 p = xdr_reserve_space(xdr, 4);
3338 if (!p)
3339 goto out_resource;
3340 err = xattr_supported_namespace(d_inode(dentry),
3341 XATTR_USER_PREFIX);
3342 *p++ = cpu_to_be32(err == 0);
3343 }
3344
ab04de60 3345 *attrlen_p = cpu_to_be32(xdr->buf->len - attrlen_offset - XDR_UNIT);
1da177e4
LT		 3346 status = nfs_ok;
3347
3348out:
ba4e55bb 3349#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 3350 if (context)
3351 security_release_secctx(context, contextlen);
ba4e55bb 3352#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 3353 kfree(acl);
18df11d0 3354 if (tempfh) {
d50e6136 3355 fh_put(tempfh);
18df11d0
YZ		 3356 kfree(tempfh);
3357 }
1fcea5b2
BF		 3358 if (status)
3359 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3360 return status;
3361out_nfserr:
b8dd7b9a 3362 status = nfserrno(err);
1da177e4
LT		 3363 goto out;
3364out_resource:
1da177e4
LT		 3365 status = nfserr_resource;
3366 goto out;
1da177e4
LT		 3367}
3368
2825a7f9
BF		 3369static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
3370 struct xdr_buf *buf, __be32 *p, int bytes)
3371{
3372 xdr->scratch.iov_len = 0;
3373 memset(buf, 0, sizeof(struct xdr_buf));
3374 buf->head[0].iov_base = p;
3375 buf->head[0].iov_len = 0;
3376 buf->len = 0;
3377 xdr->buf = buf;
3378 xdr->iov = buf->head;
3379 xdr->p = p;
3380 xdr->end = (void *)p + bytes;
3381 buf->buflen = bytes;
3382}
3383
d5184658
BF		 3384__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
3385 struct svc_fh *fhp, struct svc_export *exp,
3386 struct dentry *dentry, u32 *bmval,
3387 struct svc_rqst *rqstp, int ignore_crossmnt)
3388{
2825a7f9 3389 struct xdr_buf dummy;
d5184658
BF		 3390 struct xdr_stream xdr;
3391 __be32 ret;
3392
2825a7f9 3393 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 3394 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
3395 ignore_crossmnt);
3396 *p = xdr.p;
3397 return ret;
3398}
3399
c0ce6ec8
BF		 3400static inline int attributes_need_mount(u32 *bmval)
3401{
3402 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
3403 return 1;
3404 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
3405 return 1;
3406 return 0;
3407}
3408
b37ad28b 3409static __be32
561f0ed4
BF		 3410nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
3411 const char *name, int namlen)
1da177e4
LT		 3412{
3413 struct svc_export *exp = cd->rd_fhp->fh_export;
3414 struct dentry *dentry;
b37ad28b 3415 __be32 nfserr;
406a7ea9 3416 int ignore_crossmnt = 0;
1da177e4 3417
6c2d4798 3418 dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
1da177e4
LT		 3419 if (IS_ERR(dentry))
3420 return nfserrno(PTR_ERR(dentry));
3421
3422 exp_get(exp);
406a7ea9
FF		 3423 /*
3424 * In the case of a mountpoint, the client may be asking for
3425 * attributes that are only properties of the underlying filesystem
3426 * as opposed to the cross-mounted file system. In such a case,
3427 * we will not follow the cross mount and will fill the attribtutes
3428 * directly from the mountpoint dentry.
3429 */
3227fa41 3430 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 3431 int err;
3432
3227fa41
BF		 3433 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3434 && !attributes_need_mount(cd->rd_bmval)) {
3435 ignore_crossmnt = 1;
3436 goto out_encode;
3437 }
dcb488a3
AA		 3438 /*
3439 * Why the heck aren't we just using nfsd_lookup??
3440 * Different "."/".." handling? Something else?
3441 * At least, add a comment here to explain....
3442 */
021d3a72
BF		 3443 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3444 if (err) {
3445 nfserr = nfserrno(err);
1da177e4
LT		 3446 goto out_put;
3447 }
dcb488a3
AA		 3448 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3449 if (nfserr)
3450 goto out_put;
1da177e4
LT		 3451
3452 }
3227fa41 3453out_encode:
561f0ed4 3454 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 3455 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 3456out_put:
3457 dput(dentry);
3458 exp_put(exp);
3459 return nfserr;
3460}
3461
2ebbc012 3462static __be32 *
561f0ed4 3463nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 3464{
561f0ed4
BF		 3465 __be32 *p;
3466
c3a45617 3467 p = xdr_reserve_space(xdr, 20);
561f0ed4 3468 if (!p)
1da177e4
LT		 3469 return NULL;
3470 *p++ = htonl(2);
3471 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
3472 *p++ = htonl(0); /* bmval1 */
3473
87915c64 3474 *p++ = htonl(4); /* attribute length */
1da177e4 3475 *p++ = nfserr; /* no htonl */
1da177e4
LT		 3476 return p;
3477}
3478
3479static int
a0ad13ef
N		 3480nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3481 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 3482{
a0ad13ef 3483 struct readdir_cd *ccd = ccdv;
1da177e4 3484 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 3485 struct xdr_stream *xdr = cd->xdr;
3486 int start_offset = xdr->buf->len;
3487 int cookie_offset;
aee37764 3488 u32 name_and_cookie;
561f0ed4 3489 int entry_bytes;
b37ad28b 3490 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 3491 __be64 wire_offset;
3492 __be32 *p;
1da177e4
LT		 3493
3494 /* In nfsv4, "." and ".." never make it onto the wire.. */
3495 if (name && isdotent(name, namlen)) {
3496 cd->common.err = nfs_ok;
3497 return 0;
3498 }
3499
561f0ed4
BF		 3500 if (cd->cookie_offset) {
3501 wire_offset = cpu_to_be64(offset);
3502 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3503 &wire_offset, 8);
3504 }
1da177e4 3505
561f0ed4
BF		 3506 p = xdr_reserve_space(xdr, 4);
3507 if (!p)
1da177e4 3508 goto fail;
1da177e4 3509 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 3510 cookie_offset = xdr->buf->len;
3511 p = xdr_reserve_space(xdr, 3*4 + namlen);
3512 if (!p)
3513 goto fail;
c306d737 3514 p = xdr_encode_hyper(p, OFFSET_MAX); /* offset of next entry */
1da177e4
LT		 3515 p = xdr_encode_array(p, name, namlen); /* name length & name */
3516
561f0ed4 3517 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 3518 switch (nfserr) {
3519 case nfs_ok:
1da177e4
LT		 3520 break;
3521 case nfserr_resource:
3522 nfserr = nfserr_toosmall;
3523 goto fail;
b2c0cea6 3524 case nfserr_noent:
f41c5ad2 3525 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 3526 goto skip_entry;
1da177e4
LT		 3527 default:
3528 /*
3529 * If the client requested the RDATTR_ERROR attribute,
3530 * we stuff the error code into this attribute
3531 * and continue. If this attribute was not requested,
3532 * then in accordance with the spec, we fail the
3533 * entire READDIR operation(!)
3534 */
3535 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3536 goto fail;
561f0ed4 3537 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 3538 if (p == NULL) {
3539 nfserr = nfserr_toosmall;
1da177e4 3540 goto fail;
34081efc 3541 }
1da177e4 3542 }
561f0ed4
BF		 3543 nfserr = nfserr_toosmall;
3544 entry_bytes = xdr->buf->len - start_offset;
3545 if (entry_bytes > cd->rd_maxcount)
3546 goto fail;
3547 cd->rd_maxcount -= entry_bytes;
aee37764 3548 /*
f2e717d6
TM		 3549 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", and
3550 * notes that it could be zero. If it is zero, then the server
3551 * should enforce only the rd_maxcount value.
aee37764 3552 */
f2e717d6
TM		 3553 if (cd->rd_dircount) {
3554 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3555 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3556 goto fail;
3557 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3558 if (!cd->rd_dircount)
3559 cd->rd_maxcount = 0;
3560 }
0ec016e3 3561
561f0ed4 3562 cd->cookie_offset = cookie_offset;
b2c0cea6 3563skip_entry:
1da177e4
LT		 3564 cd->common.err = nfs_ok;
3565 return 0;
3566fail:
561f0ed4 3567 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 3568 cd->common.err = nfserr;
3569 return -EINVAL;
3570}
3571
d0a381dd
BF		 3572static __be32
3573nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 3574{
bc749ca4 3575 __be32 *p;
e2f282b9 3576
d0a381dd
BF		 3577 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3578 if (!p)
3579 return nfserr_resource;
c373b0a4 3580 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 3581 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3582 sizeof(stateid_opaque_t));
d0a381dd 3583 return 0;
e2f282b9
BH		 3584}
3585
695e12f8 3586static __be32
b37ad28b 3587nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 3588{
bddfdbcd 3589 struct xdr_stream *xdr = resp->xdr;
bc749ca4 3590 __be32 *p;
1da177e4 3591
bac966d6
BF		 3592 p = xdr_reserve_space(xdr, 8);
3593 if (!p)
3594 return nfserr_resource;
3595 *p++ = cpu_to_be32(access->ac_supported);
3596 *p++ = cpu_to_be32(access->ac_resp_access);
3597 return 0;
1da177e4
LT		 3598}
3599
1d1bc8f2
BF		 3600static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3601{
bddfdbcd 3602 struct xdr_stream *xdr = resp->xdr;
1d1bc8f2
BF		 3603 __be32 *p;
3604
bac966d6
BF		 3605 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3606 if (!p)
3607 return nfserr_resource;
3608 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3609 NFS4_MAX_SESSIONID_LEN);
3610 *p++ = cpu_to_be32(bcts->dir);
3611 /* Upshifting from TCP to RDMA is not supported */
3612 *p++ = cpu_to_be32(0);
3613 return 0;
1d1bc8f2
BF		 3614}
3615
695e12f8 3616static __be32
b37ad28b 3617nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 3618{
bddfdbcd 3619 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3620
bac966d6 3621 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
1da177e4
LT		 3622}
3623
3624
695e12f8 3625static __be32
b37ad28b 3626nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 3627{
bddfdbcd 3628 struct xdr_stream *xdr = resp->xdr;
bc749ca4 3629 __be32 *p;
1da177e4 3630
bac966d6
BF		 3631 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3632 if (!p)
3633 return nfserr_resource;
3634 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
0c0c267b 3635 NFS4_VERIFIER_SIZE);
bac966d6 3636 return 0;
1da177e4
LT		 3637}
3638
695e12f8 3639static __be32
b37ad28b 3640nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 3641{
bddfdbcd 3642 struct xdr_stream *xdr = resp->xdr;
bc749ca4 3643 __be32 *p;
1da177e4 3644
bac966d6
BF		 3645 p = xdr_reserve_space(xdr, 20);
3646 if (!p)
3647 return nfserr_resource;
3648 encode_cinfo(p, &create->cr_cinfo);
b96811cd 3649 return nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
bac966d6 3650 create->cr_bmval[1], create->cr_bmval[2]);
1da177e4
LT		 3651}
3652
b37ad28b
AV		 3653static __be32
3654nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 3655{
3656 struct svc_fh *fhp = getattr->ga_fhp;
bddfdbcd 3657 struct xdr_stream *xdr = resp->xdr;
1da177e4 3658
bac966d6
BF		 3659 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3660 getattr->ga_bmval, resp->rqstp, 0);
1da177e4
LT		 3661}
3662
695e12f8
BH		 3663static __be32
3664nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 3665{
bddfdbcd 3666 struct xdr_stream *xdr = resp->xdr;
695e12f8 3667 struct svc_fh *fhp = *fhpp;
1da177e4 3668 unsigned int len;
bc749ca4 3669 __be32 *p;
1da177e4 3670
bac966d6
BF		 3671 len = fhp->fh_handle.fh_size;
3672 p = xdr_reserve_space(xdr, len + 4);
3673 if (!p)
3674 return nfserr_resource;
d8b26071 3675 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_raw, len);
bac966d6 3676 return 0;
1da177e4
LT		 3677}
3678
3679/*
3680* Including all fields other than the name, a LOCK4denied structure requires
3681* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3682*/
d0a381dd
BF		 3683static __be32
3684nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 3685{
7c13f344 3686 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 3687 __be32 *p;
1da177e4 3688
8c7424cf 3689again:
d0a381dd 3690 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 3691 if (!p) {
3692 /*
3693 * Don't fail to return the result just because we can't
3694 * return the conflicting open:
3695 */
3696 if (conf->len) {
f98bac5a 3697 kfree(conf->data);
8c7424cf
BF		 3698 conf->len = 0;
3699 conf->data = NULL;
3700 goto again;
3701 }
d0a381dd 3702 return nfserr_resource;
8c7424cf 3703 }
b64c7f3b
BF		 3704 p = xdr_encode_hyper(p, ld->ld_start);
3705 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 3706 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 3707 if (conf->len) {
0c0c267b
BF		 3708 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3709 p = xdr_encode_opaque(p, conf->data, conf->len);
f98bac5a 3710 kfree(conf->data);
1da177e4 3711 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 3712 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 3713 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 3714 }
d0a381dd 3715 return nfserr_denied;
1da177e4
LT		 3716}
3717
695e12f8 3718static __be32
b37ad28b 3719nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 3720{
bddfdbcd 3721 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3722
e2f282b9 3723 if (!nfserr)
d0a381dd 3724 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 3725 else if (nfserr == nfserr_denied)
d0a381dd 3726 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
f98bac5a 3727
695e12f8 3728 return nfserr;
1da177e4
LT		 3729}
3730
695e12f8 3731static __be32
b37ad28b 3732nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 3733{
bddfdbcd 3734 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3735
1da177e4 3736 if (nfserr == nfserr_denied)
d0a381dd 3737 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 3738 return nfserr;
1da177e4
LT		 3739}
3740
695e12f8 3741static __be32
b37ad28b 3742nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 3743{
bddfdbcd 3744 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3745
bac966d6 3746 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
1da177e4
LT		 3747}
3748
3749
695e12f8 3750static __be32
b37ad28b 3751nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 3752{
bddfdbcd 3753 struct xdr_stream *xdr = resp->xdr;
bc749ca4 3754 __be32 *p;
1da177e4 3755
bac966d6
BF		 3756 p = xdr_reserve_space(xdr, 20);
3757 if (!p)
3758 return nfserr_resource;
3759 p = encode_cinfo(p, &link->li_cinfo);
3760 return 0;
1da177e4
LT		 3761}
3762
3763
695e12f8 3764static __be32
b37ad28b 3765nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 3766{
bddfdbcd 3767 struct xdr_stream *xdr = resp->xdr;
bc749ca4 3768 __be32 *p;
1da177e4 3769
d0a381dd
BF		 3770 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3771 if (nfserr)
bac966d6 3772 return nfserr;
75976de6 3773 p = xdr_reserve_space(xdr, 24);
d0a381dd
BF		 3774 if (!p)
3775 return nfserr_resource;
d05d5744 3776 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4 3777 *p++ = cpu_to_be32(open->op_rflags);
1da177e4 3778
75976de6
KM		 3779 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3780 open->op_bmval[2]);
3781 if (nfserr)
bac966d6 3782 return nfserr;
75976de6
KM		 3783
3784 p = xdr_reserve_space(xdr, 4);
3785 if (!p)
3786 return nfserr_resource;
3787
3788 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 3789 switch (open->op_delegate_type) {
3790 case NFS4_OPEN_DELEGATE_NONE:
3791 break;
3792 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 3793 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3794 if (nfserr)
3795 return nfserr;
3796 p = xdr_reserve_space(xdr, 20);
3797 if (!p)
3798 return nfserr_resource;
c373b0a4 3799 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 3800
3801 /*
3802 * TODO: ACE's in delegations
3803 */
c373b0a4
BF		 3804 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3805 *p++ = cpu_to_be32(0);
3806 *p++ = cpu_to_be32(0);
3807 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 3808 break;
3809 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 3810 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3811 if (nfserr)
3812 return nfserr;
3813 p = xdr_reserve_space(xdr, 32);
3814 if (!p)
3815 return nfserr_resource;
c373b0a4 3816 *p++ = cpu_to_be32(0);
1da177e4
LT		 3817
3818 /*
3819 * TODO: space_limit's in delegations
3820 */
c373b0a4
BF		 3821 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3822 *p++ = cpu_to_be32(~(u32)0);
3823 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3824
3825 /*
3826 * TODO: ACE's in delegations
3827 */
c373b0a4
BF		 3828 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3829 *p++ = cpu_to_be32(0);
3830 *p++ = cpu_to_be32(0);
3831 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3832 break;
d24433cd
BH		 3833 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3834 switch (open->op_why_no_deleg) {
3835 case WND4_CONTENTION:
3836 case WND4_RESOURCE:
d0a381dd
BF		 3837 p = xdr_reserve_space(xdr, 8);
3838 if (!p)
3839 return nfserr_resource;
c373b0a4
BF		 3840 *p++ = cpu_to_be32(open->op_why_no_deleg);
3841 /* deleg signaling not supported yet: */
3842 *p++ = cpu_to_be32(0);
d24433cd
BH		 3843 break;
3844 default:
d0a381dd
BF		 3845 p = xdr_reserve_space(xdr, 4);
3846 if (!p)
3847 return nfserr_resource;
c373b0a4 3848 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3849 }
d24433cd 3850 break;
1da177e4
LT		 3851 default:
3852 BUG();
3853 }
3854 /* XXX save filehandle here */
bac966d6 3855 return 0;
1da177e4
LT		 3856}
3857
695e12f8 3858static __be32
b37ad28b 3859nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3860{
bddfdbcd 3861 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3862
bac966d6 3863 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4
LT		 3864}
3865
695e12f8 3866static __be32
b37ad28b 3867nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3868{
bddfdbcd 3869 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3870
bac966d6 3871 return nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4
LT		 3872}
3873
dc97618d
BF		 3874static __be32 nfsd4_encode_splice_read(
3875 struct nfsd4_compoundres *resp,
3876 struct nfsd4_read *read,
3877 struct file *file, unsigned long maxcount)
1da177e4 3878{
bddfdbcd 3879 struct xdr_stream *xdr = resp->xdr;
34a78b48 3880 struct xdr_buf *buf = xdr->buf;
76e5492b 3881 int status, space_left;
dc97618d 3882 u32 eof;
dc97618d 3883 __be32 nfserr;
fec25fa4 3884 __be32 *p = xdr->p - 2;
1da177e4 3885
d5d5c304
KM		 3886 /* Make sure there will be room for padding if needed */
3887 if (xdr->end - xdr->p < 1)
d0a381dd 3888 return nfserr_resource;
dc97618d 3889
87c5942e 3890 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
83a63072 3891 file, read->rd_offset, &maxcount, &eof);
87c5942e 3892 read->rd_length = maxcount;
76e5492b
CL		 3893 if (nfserr)
3894 goto out_err;
3895 status = svc_encode_result_payload(read->rd_rqstp,
3896 buf->head[0].iov_len, maxcount);
3897 if (status) {
3898 nfserr = nfserrno(status);
3899 goto out_err;
b0e35fda 3900 }
1da177e4 3901
fec25fa4
BF		 3902 *(p++) = htonl(eof);
3903 *(p++) = htonl(maxcount);
dc97618d 3904
34a78b48
BF		 3905 buf->page_len = maxcount;
3906 buf->len += maxcount;
15b23ef5
BF		 3907 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3908 / PAGE_SIZE;
dc97618d
BF		 3909
3910 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3911 buf->tail[0].iov_base = xdr->p;
3912 buf->tail[0].iov_len = 0;
fec25fa4 3913 xdr->iov = buf->tail;
dc97618d 3914 if (maxcount&3) {
fec25fa4
BF		 3915 int pad = 4 - (maxcount&3);
3916
3917 *(xdr->p++) = 0;
3918
34a78b48 3919 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3920 buf->tail[0].iov_len = pad;
3921 buf->len += pad;
b0e35fda 3922 }
2825a7f9 3923
dc97618d 3924 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3925 buf->buflen - buf->len);
3926 buf->buflen = buf->len + space_left;
dc97618d
BF		 3927 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3928
3929 return 0;
76e5492b
CL		 3930
3931out_err:
3932 /*
3933 * nfsd_splice_actor may have already messed with the
3934 * page length; reset it so as not to confuse
3935 * xdr_truncate_encode in our caller.
3936 */
3937 buf->page_len = 0;
3938 return nfserr;
dc97618d
BF		 3939}
3940
3941static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3942 struct nfsd4_read *read,
3943 struct file *file, unsigned long maxcount)
3944{
bddfdbcd 3945 struct xdr_stream *xdr = resp->xdr;
dc97618d 3946 u32 eof;
dc97618d 3947 int starting_len = xdr->buf->len - 8;
dc97618d
BF		 3948 __be32 nfserr;
3949 __be32 tmp;
b0420980 3950 int pad;
1da177e4 3951
403217f3
AS		 3952 read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, maxcount);
3953 if (read->rd_vlen < 0)
3954 return nfserr_resource;
1da177e4 3955
87c5942e 3956 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
83a63072
TM		 3957 resp->rqstp->rq_vec, read->rd_vlen, &maxcount,
3958 &eof);
87c5942e 3959 read->rd_length = maxcount;
dc97618d 3960 if (nfserr)
1da177e4 3961 return nfserr;
03493bca 3962 if (svc_encode_result_payload(resp->rqstp, starting_len + 8, maxcount))
41205539 3963 return nfserr_io;
7dcf4ab9 3964 xdr_truncate_encode(xdr, starting_len + 8 + xdr_align_size(maxcount));
dc97618d 3965
dc97618d
BF		 3966 tmp = htonl(eof);
3967 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3968 tmp = htonl(maxcount);
3969 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3970
7dcf4ab9 3971 tmp = xdr_zero;
b0420980
BF		 3972 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3973 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
7dcf4ab9 3974 &tmp, pad);
1da177e4 3975 return 0;
dc97618d
BF		 3976
3977}
3978
3979static __be32
3980nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3981 struct nfsd4_read *read)
3982{
c738b218 3983 bool splice_ok = test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags);
dc97618d 3984 unsigned long maxcount;
bddfdbcd 3985 struct xdr_stream *xdr = resp->xdr;
5c4583b2 3986 struct file *file;
dc97618d 3987 int starting_len = xdr->buf->len;
dc97618d 3988 __be32 *p;
dc97618d 3989
5c4583b2
JL		 3990 if (nfserr)
3991 return nfserr;
3992 file = read->rd_nf->nf_file;
3993
dc97618d
BF		 3994 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3995 if (!p) {
c738b218 3996 WARN_ON_ONCE(splice_ok);
bac966d6 3997 return nfserr_resource;
dc97618d 3998 }
c738b218 3999 if (resp->xdr->buf->page_len && splice_ok) {
b0420980 4000 WARN_ON_ONCE(1);
bac966d6 4001 return nfserr_resource;
dc97618d 4002 }
dc97618d
BF		 4003 xdr_commit_encode(xdr);
4004
0cb4d23a 4005 maxcount = min_t(unsigned long, read->rd_length,
68e8bb03 4006 (xdr->buf->buflen - xdr->buf->len));
dc97618d 4007
c738b218 4008 if (file->f_op->splice_read && splice_ok)
96bcad50 4009 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
dc97618d 4010 else
96bcad50 4011 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
dc97618d 4012
96bcad50 4013 if (nfserr)
dc97618d 4014 xdr_truncate_encode(xdr, starting_len);
96bcad50 4015
96bcad50 4016 return nfserr;
1da177e4
LT		 4017}
4018
b37ad28b
AV		 4019static __be32
4020nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 4021{
4022 int maxcount;
476a7b1f
BF		 4023 __be32 wire_count;
4024 int zero = 0;
bddfdbcd 4025 struct xdr_stream *xdr = resp->xdr;
1fcea5b2 4026 int length_offset = xdr->buf->len;
76e5492b 4027 int status;
bc749ca4 4028 __be32 *p;
1da177e4 4029
2825a7f9
BF		 4030 p = xdr_reserve_space(xdr, 4);
4031 if (!p)
4032 return nfserr_resource;
1da177e4 4033 maxcount = PAGE_SIZE;
d0a381dd 4034
476a7b1f
BF		 4035 p = xdr_reserve_space(xdr, maxcount);
4036 if (!p)
4e21ac4b 4037 return nfserr_resource;
1da177e4 4038 /*
fd4a0edf
MS		 4039 * XXX: By default, vfs_readlink() will truncate symlinks if they
4040 * would overflow the buffer. Is this kosher in NFSv4? If not, one
4041 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
4042 * that truncation occurred, and return NFS4ERR_RESOURCE.
1da177e4 4043 */
476a7b1f
BF		 4044 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
4045 (char *)p, &maxcount);
1da177e4 4046 if (nfserr == nfserr_isdir)
d3f627c8 4047 nfserr = nfserr_inval;
76e5492b
CL		 4048 if (nfserr)
4049 goto out_err;
4050 status = svc_encode_result_payload(readlink->rl_rqstp, length_offset,
4051 maxcount);
4052 if (status) {
4053 nfserr = nfserrno(status);
4054 goto out_err;
d3f627c8 4055 }
1da177e4 4056
476a7b1f
BF		 4057 wire_count = htonl(maxcount);
4058 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
69bbd9c7 4059 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
476a7b1f
BF		 4060 if (maxcount & 3)
4061 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
4062 &zero, 4 - (maxcount&3));
1da177e4 4063 return 0;
76e5492b
CL		 4064
4065out_err:
4066 xdr_truncate_encode(xdr, length_offset);
4067 return nfserr;
1da177e4
LT		 4068}
4069
b37ad28b
AV		 4070static __be32
4071nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 4072{
4073 int maxcount;
561f0ed4 4074 int bytes_left;
1da177e4 4075 loff_t offset;
561f0ed4 4076 __be64 wire_offset;
bddfdbcd 4077 struct xdr_stream *xdr = resp->xdr;
1fcea5b2 4078 int starting_len = xdr->buf->len;
bc749ca4 4079 __be32 *p;
1da177e4 4080
d0a381dd
BF		 4081 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
4082 if (!p)
4083 return nfserr_resource;
1da177e4
LT		 4084
4085 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 4086 *p++ = cpu_to_be32(0);
4087 *p++ = cpu_to_be32(0);
bddfdbcd
CL		 4088 xdr->buf->head[0].iov_len = (char *)xdr->p -
4089 (char *)xdr->buf->head[0].iov_base;
1da177e4
LT		 4090
4091 /*
561f0ed4
BF		 4092 * Number of bytes left for directory entries allowing for the
4093 * final 8 bytes of the readdir and a following failed op:
4094 */
4095 bytes_left = xdr->buf->buflen - xdr->buf->len
4096 - COMPOUND_ERR_SLACK_SPACE - 8;
4097 if (bytes_left < 0) {
4098 nfserr = nfserr_resource;
4099 goto err_no_verf;
4100 }
9c2ece6e
SM		 4101 maxcount = svc_max_payload(resp->rqstp);
4102 maxcount = min_t(u32, readdir->rd_maxcount, maxcount);
561f0ed4
BF		 4103 /*
4104 * Note the rfc defines rd_maxcount as the size of the
4105 * READDIR4resok structure, which includes the verifier above
4106 * and the 8 bytes encoded at the end of this function:
1da177e4 4107 */
561f0ed4
BF		 4108 if (maxcount < 16) {
4109 nfserr = nfserr_toosmall;
1da177e4
LT		 4110 goto err_no_verf;
4111 }
561f0ed4 4112 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 4113
aee37764
BF		 4114 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
4115 if (!readdir->rd_dircount)
9c2ece6e 4116 readdir->rd_dircount = svc_max_payload(resp->rqstp);
aee37764 4117
561f0ed4
BF		 4118 readdir->xdr = xdr;
4119 readdir->rd_maxcount = maxcount;
1da177e4 4120 readdir->common.err = 0;
561f0ed4 4121 readdir->cookie_offset = 0;
1da177e4
LT		 4122
4123 offset = readdir->rd_cookie;
4124 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
4125 &offset,
4126 &readdir->common, nfsd4_encode_dirent);
4127 if (nfserr == nfs_ok &&
4128 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 4129 xdr->buf->len == starting_len + 8) {
4130 /* nothing encoded; which limit did we hit?: */
4131 if (maxcount - 16 < bytes_left)
4132 /* It was the fault of rd_maxcount: */
4133 nfserr = nfserr_toosmall;
4134 else
4135 /* We ran out of buffer space: */
4136 nfserr = nfserr_resource;
4137 }
1da177e4
LT		 4138 if (nfserr)
4139 goto err_no_verf;
4140
561f0ed4
BF		 4141 if (readdir->cookie_offset) {
4142 wire_offset = cpu_to_be64(offset);
4143 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
4144 &wire_offset, 8);
4145 }
1da177e4 4146
561f0ed4
BF		 4147 p = xdr_reserve_space(xdr, 8);
4148 if (!p) {
4149 WARN_ON_ONCE(1);
4150 goto err_no_verf;
4151 }
1da177e4
LT		 4152 *p++ = 0; /* no more entries */
4153 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 4154
4155 return 0;
4156err_no_verf:
1fcea5b2 4157 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 4158 return nfserr;
4159}
4160
695e12f8 4161static __be32
b37ad28b 4162nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 4163{
bddfdbcd 4164 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4165 __be32 *p;
1da177e4 4166
bac966d6
BF		 4167 p = xdr_reserve_space(xdr, 20);
4168 if (!p)
4169 return nfserr_resource;
4170 p = encode_cinfo(p, &remove->rm_cinfo);
4171 return 0;
1da177e4
LT		 4172}
4173
695e12f8 4174static __be32
b37ad28b 4175nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 4176{
bddfdbcd 4177 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4178 __be32 *p;
1da177e4 4179
bac966d6
BF		 4180 p = xdr_reserve_space(xdr, 40);
4181 if (!p)
4182 return nfserr_resource;
4183 p = encode_cinfo(p, &rename->rn_sinfo);
4184 p = encode_cinfo(p, &rename->rn_tinfo);
4185 return 0;
1da177e4
LT		 4186}
4187
695e12f8 4188static __be32
bac966d6 4189nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
dcb488a3 4190{
676e4ebd 4191 u32 i, nflavs, supported;
4796f457
BF		 4192 struct exp_flavor_info *flavs;
4193 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 4194 __be32 *p, *flavorsp;
4195 static bool report = true;
dcb488a3 4196
4796f457
BF		 4197 if (exp->ex_nflavors) {
4198 flavs = exp->ex_flavors;
4199 nflavs = exp->ex_nflavors;
4200 } else { /* Handling of some defaults in absence of real secinfo: */
4201 flavs = def_flavs;
4202 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
4203 nflavs = 2;
4204 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
4205 flavs[1].pseudoflavor = RPC_AUTH_NULL;
4206 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
4207 nflavs = 1;
4208 flavs[0].pseudoflavor
4209 = svcauth_gss_flavor(exp->ex_client);
4210 } else {
4211 nflavs = 1;
4212 flavs[0].pseudoflavor
4213 = exp->ex_client->flavour->flavour;
4214 }
4215 }
4216
676e4ebd 4217 supported = 0;
d0a381dd
BF		 4218 p = xdr_reserve_space(xdr, 4);
4219 if (!p)
bac966d6 4220 return nfserr_resource;
676e4ebd 4221 flavorsp = p++; /* to be backfilled later */
676e4ebd 4222
4796f457 4223 for (i = 0; i < nflavs; i++) {
676e4ebd 4224 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 4225 struct rpcsec_gss_info info;
dcb488a3 4226
676e4ebd
CL		 4227 if (rpcauth_get_gssinfo(pf, &info) == 0) {
4228 supported++;
d0a381dd
BF		 4229 p = xdr_reserve_space(xdr, 4 + 4 +
4230 XDR_LEN(info.oid.len) + 4 + 4);
4231 if (!p)
bac966d6 4232 return nfserr_resource;
c373b0a4 4233 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 4234 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 4235 *p++ = cpu_to_be32(info.qop);
4236 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 4237 } else if (pf < RPC_AUTH_MAXFLAVOR) {
4238 supported++;
d0a381dd
BF		 4239 p = xdr_reserve_space(xdr, 4);
4240 if (!p)
bac966d6 4241 return nfserr_resource;
c373b0a4 4242 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 4243 } else {
4244 if (report)
4245 pr_warn("NFS: SECINFO: security flavor %u "
4246 "is not supported\n", pf);
dcb488a3
AA		 4247 }
4248 }
a77c806f 4249
676e4ebd
CL		 4250 if (nflavs != supported)
4251 report = false;
4252 *flavorsp = htonl(supported);
bac966d6 4253 return 0;
dcb488a3
AA		 4254}
4255
22b6dee8
MJ		 4256static __be32
4257nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4258 struct nfsd4_secinfo *secinfo)
4259{
bddfdbcd 4260 struct xdr_stream *xdr = resp->xdr;
d0a381dd 4261
bac966d6 4262 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
22b6dee8
MJ		 4263}
4264
4265static __be32
4266nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
4267 struct nfsd4_secinfo_no_name *secinfo)
4268{
bddfdbcd 4269 struct xdr_stream *xdr = resp->xdr;
d0a381dd 4270
bac966d6 4271 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
22b6dee8
MJ		 4272}
4273
1da177e4
LT		 4274/*
4275 * The SETATTR encode routine is special -- it always encodes a bitmap,
4276 * regardless of the error status.
4277 */
695e12f8 4278static __be32
b37ad28b 4279nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 4280{
bddfdbcd 4281 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4282 __be32 *p;
1da177e4 4283
d0a381dd
BF		 4284 p = xdr_reserve_space(xdr, 16);
4285 if (!p)
4286 return nfserr_resource;
1da177e4 4287 if (nfserr) {
c373b0a4
BF		 4288 *p++ = cpu_to_be32(3);
4289 *p++ = cpu_to_be32(0);
4290 *p++ = cpu_to_be32(0);
4291 *p++ = cpu_to_be32(0);
1da177e4
LT		 4292 }
4293 else {
c373b0a4
BF		 4294 *p++ = cpu_to_be32(3);
4295 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
4296 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
4297 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 4298 }
695e12f8 4299 return nfserr;
1da177e4
LT		 4300}
4301
695e12f8 4302static __be32
b37ad28b 4303nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 4304{
bddfdbcd 4305 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4306 __be32 *p;
1da177e4
LT		 4307
4308 if (!nfserr) {
d0a381dd
BF		 4309 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
4310 if (!p)
4311 return nfserr_resource;
0c0c267b
BF		 4312 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
4313 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
4314 NFS4_VERIFIER_SIZE);
1da177e4
LT		 4315 }
4316 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 4317 p = xdr_reserve_space(xdr, 8);
4318 if (!p)
4319 return nfserr_resource;
c373b0a4
BF		 4320 *p++ = cpu_to_be32(0);
4321 *p++ = cpu_to_be32(0);
1da177e4 4322 }
695e12f8 4323 return nfserr;
1da177e4
LT		 4324}
4325
695e12f8 4326static __be32
b37ad28b 4327nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 4328{
bddfdbcd 4329 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4330 __be32 *p;
1da177e4 4331
bac966d6
BF		 4332 p = xdr_reserve_space(xdr, 16);
4333 if (!p)
4334 return nfserr_resource;
4335 *p++ = cpu_to_be32(write->wr_bytes_written);
4336 *p++ = cpu_to_be32(write->wr_how_written);
4337 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4338 NFS4_VERIFIER_SIZE);
4339 return 0;
1da177e4
LT		 4340}
4341
2db134eb 4342static __be32
57b7b43b 4343nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4344 struct nfsd4_exchange_id *exid)
4345{
bddfdbcd 4346 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4347 __be32 *p;
0733d213
AA		 4348 char *major_id;
4349 char *server_scope;
4350 int major_id_sz;
4351 int server_scope_sz;
4352 uint64_t minor_id = 0;
7627d7dc 4353 struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id);
0733d213 4354
7627d7dc
SM		 4355 major_id = nn->nfsd_name;
4356 major_id_sz = strlen(nn->nfsd_name);
4357 server_scope = nn->nfsd_name;
4358 server_scope_sz = strlen(nn->nfsd_name);
0733d213 4359
d0a381dd 4360 p = xdr_reserve_space(xdr,
0733d213
AA		 4361 8 /* eir_clientid */ +
4362 4 /* eir_sequenceid */ +
4363 4 /* eir_flags */ +
a8bb84bc 4364 4 /* spr_how */);
d0a381dd
BF		 4365 if (!p)
4366 return nfserr_resource;
0733d213 4367
0c0c267b 4368 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 4369 *p++ = cpu_to_be32(exid->seqid);
4370 *p++ = cpu_to_be32(exid->flags);
0733d213 4371
c373b0a4 4372 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 4373
57266a6e
BF		 4374 switch (exid->spa_how) {
4375 case SP4_NONE:
4376 break;
4377 case SP4_MACH_CRED:
4378 /* spo_must_enforce bitmap: */
bac966d6 4379 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 4380 exid->spo_must_enforce[0],
4381 exid->spo_must_enforce[1],
4382 exid->spo_must_enforce[2]);
bac966d6
BF		 4383 if (nfserr)
4384 return nfserr;
ed941643 4385 /* spo_must_allow bitmap: */
bac966d6 4386 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 4387 exid->spo_must_allow[0],
4388 exid->spo_must_allow[1],
4389 exid->spo_must_allow[2]);
bac966d6
BF		 4390 if (nfserr)
4391 return nfserr;
57266a6e
BF		 4392 break;
4393 default:
4394 WARN_ON_ONCE(1);
4395 }
0733d213 4396
d0a381dd 4397 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 4398 8 /* so_minor_id */ +
4399 4 /* so_major_id.len */ +
4400 (XDR_QUADLEN(major_id_sz) * 4) +
4401 4 /* eir_server_scope.len */ +
4402 (XDR_QUADLEN(server_scope_sz) * 4) +
4403 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 4404 if (!p)
4405 return nfserr_resource;
a8bb84bc 4406
0733d213 4407 /* The server_owner struct */
b64c7f3b 4408 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 4409 /* major id */
0c0c267b 4410 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 4411
4412 /* Server scope */
0c0c267b 4413 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 4414
4415 /* Implementation id */
c373b0a4 4416 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 4417 return 0;
2db134eb
AA		 4418}
4419
4420static __be32
57b7b43b 4421nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4422 struct nfsd4_create_session *sess)
4423{
bddfdbcd 4424 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4425 __be32 *p;
ec6b5d7b 4426
d0a381dd
BF		 4427 p = xdr_reserve_space(xdr, 24);
4428 if (!p)
4429 return nfserr_resource;
0c0c267b
BF		 4430 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4431 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4432 *p++ = cpu_to_be32(sess->seqid);
4433 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 4434
d0a381dd
BF		 4435 p = xdr_reserve_space(xdr, 28);
4436 if (!p)
4437 return nfserr_resource;
c373b0a4
BF		 4438 *p++ = cpu_to_be32(0); /* headerpadsz */
4439 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4440 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4441 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4442 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4443 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4444 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4445
4446 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 4447 p = xdr_reserve_space(xdr, 4);
4448 if (!p)
4449 return nfserr_resource;
c373b0a4 4450 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 4451 }
4452
d0a381dd
BF		 4453 p = xdr_reserve_space(xdr, 28);
4454 if (!p)
4455 return nfserr_resource;
c373b0a4
BF		 4456 *p++ = cpu_to_be32(0); /* headerpadsz */
4457 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4458 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4459 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4460 *p++ = cpu_to_be32(sess->back_channel.maxops);
4461 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4462 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4463
4464 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 4465 p = xdr_reserve_space(xdr, 4);
4466 if (!p)
4467 return nfserr_resource;
c373b0a4 4468 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 4469 }
4470 return 0;
2db134eb
AA		 4471}
4472
c47d832b 4473static __be32
57b7b43b 4474nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4475 struct nfsd4_sequence *seq)
4476{
bddfdbcd 4477 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4478 __be32 *p;
b85d4c01 4479
d0a381dd
BF		 4480 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4481 if (!p)
4482 return nfserr_resource;
0c0c267b
BF		 4483 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4484 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4485 *p++ = cpu_to_be32(seq->seqid);
4486 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 4487 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 4488 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4489 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4490 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 4491
f5236013 4492 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 4493 return 0;
2db134eb
AA		 4494}
4495
2355c596 4496static __be32
57b7b43b 4497nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 4498 struct nfsd4_test_stateid *test_stateid)
4499{
bddfdbcd 4500 struct xdr_stream *xdr = resp->xdr;
03cfb420 4501 struct nfsd4_test_stateid_id *stateid, *next;
17456804 4502 __be32 *p;
17456804 4503
d0a381dd
BF		 4504 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4505 if (!p)
4506 return nfserr_resource;
17456804 4507 *p++ = htonl(test_stateid->ts_num_ids);
17456804 4508
03cfb420 4509 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 4510 *p++ = stateid->ts_id_status;
17456804 4511 }
17456804 4512
bac966d6 4513 return 0;
17456804
BS		 4514}
4515
9cf514cc
CH		 4516#ifdef CONFIG_NFSD_PNFS
4517static __be32
4518nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4519 struct nfsd4_getdeviceinfo *gdev)
4520{
bddfdbcd 4521 struct xdr_stream *xdr = resp->xdr;
f961e3f2 4522 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4523 u32 starting_len = xdr->buf->len, needed_len;
4524 __be32 *p;
4525
9cf514cc
CH		 4526 p = xdr_reserve_space(xdr, 4);
4527 if (!p)
bac966d6 4528 return nfserr_resource;
9cf514cc
CH		 4529
4530 *p++ = cpu_to_be32(gdev->gd_layout_type);
4531
4532 /* If maxcount is 0 then just update notifications */
4533 if (gdev->gd_maxcount != 0) {
f961e3f2 4534 ops = nfsd4_layout_ops[gdev->gd_layout_type];
9cf514cc
CH		 4535 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4536 if (nfserr) {
4537 /*
4538 * We don't bother to burden the layout drivers with
4539 * enforcing gd_maxcount, just tell the client to
4540 * come back with a bigger buffer if it's not enough.
4541 */
4542 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4543 goto toosmall;
bac966d6 4544 return nfserr;
9cf514cc
CH		 4545 }
4546 }
4547
9cf514cc
CH		 4548 if (gdev->gd_notify_types) {
4549 p = xdr_reserve_space(xdr, 4 + 4);
4550 if (!p)
bac966d6 4551 return nfserr_resource;
9cf514cc
CH		 4552 *p++ = cpu_to_be32(1); /* bitmap length */
4553 *p++ = cpu_to_be32(gdev->gd_notify_types);
4554 } else {
4555 p = xdr_reserve_space(xdr, 4);
4556 if (!p)
bac966d6 4557 return nfserr_resource;
9cf514cc
CH		 4558 *p++ = 0;
4559 }
4560
bac966d6 4561 return 0;
9cf514cc
CH		 4562toosmall:
4563 dprintk("%s: maxcount too small\n", __func__);
4564 needed_len = xdr->buf->len + 4 /* notifications */;
4565 xdr_truncate_encode(xdr, starting_len);
4566 p = xdr_reserve_space(xdr, 4);
bac966d6
BF		 4567 if (!p)
4568 return nfserr_resource;
4569 *p++ = cpu_to_be32(needed_len);
4570 return nfserr_toosmall;
9cf514cc
CH		 4571}
4572
4573static __be32
4574nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4575 struct nfsd4_layoutget *lgp)
4576{
bddfdbcd 4577 struct xdr_stream *xdr = resp->xdr;
f961e3f2 4578 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4579 __be32 *p;
4580
9cf514cc
CH		 4581 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4582 if (!p)
bac966d6 4583 return nfserr_resource;
9cf514cc
CH		 4584
4585 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4586 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4587 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4588 sizeof(stateid_opaque_t));
4589
4590 *p++ = cpu_to_be32(1); /* we always return a single layout */
4591 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4592 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4593 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4594 *p++ = cpu_to_be32(lgp->lg_layout_type);
4595
f961e3f2 4596 ops = nfsd4_layout_ops[lgp->lg_layout_type];
bac966d6 4597 return ops->encode_layoutget(xdr, lgp);
9cf514cc
CH		 4598}
4599
4600static __be32
4601nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4602 struct nfsd4_layoutcommit *lcp)
4603{
bddfdbcd 4604 struct xdr_stream *xdr = resp->xdr;
9cf514cc
CH		 4605 __be32 *p;
4606
9cf514cc
CH		 4607 p = xdr_reserve_space(xdr, 4);
4608 if (!p)
4609 return nfserr_resource;
4610 *p++ = cpu_to_be32(lcp->lc_size_chg);
4611 if (lcp->lc_size_chg) {
4612 p = xdr_reserve_space(xdr, 8);
4613 if (!p)
4614 return nfserr_resource;
4615 p = xdr_encode_hyper(p, lcp->lc_newsize);
4616 }
4617
bac966d6 4618 return 0;
9cf514cc
CH		 4619}
4620
4621static __be32
4622nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4623 struct nfsd4_layoutreturn *lrp)
4624{
bddfdbcd 4625 struct xdr_stream *xdr = resp->xdr;
9cf514cc
CH		 4626 __be32 *p;
4627
9cf514cc
CH		 4628 p = xdr_reserve_space(xdr, 4);
4629 if (!p)
4630 return nfserr_resource;
4631 *p++ = cpu_to_be32(lrp->lrs_present);
4632 if (lrp->lrs_present)
376675da 4633 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
bac966d6 4634 return 0;
9cf514cc
CH		 4635}
4636#endif /* CONFIG_NFSD_PNFS */
4637
29ae7f9d 4638static __be32
e0639dc5
OK		 4639nfsd42_encode_write_res(struct nfsd4_compoundres *resp,
4640 struct nfsd42_write_res *write, bool sync)
29ae7f9d
AS		 4641{
4642 __be32 *p;
bddfdbcd 4643 p = xdr_reserve_space(resp->xdr, 4);
e0639dc5
OK		 4644 if (!p)
4645 return nfserr_resource;
29ae7f9d 4646
e0639dc5
OK		 4647 if (sync)
4648 *p++ = cpu_to_be32(0);
4649 else {
4650 __be32 nfserr;
4651 *p++ = cpu_to_be32(1);
bddfdbcd 4652 nfserr = nfsd4_encode_stateid(resp->xdr, &write->cb_stateid);
e0639dc5
OK		 4653 if (nfserr)
4654 return nfserr;
4655 }
bddfdbcd 4656 p = xdr_reserve_space(resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE);
29ae7f9d
AS		 4657 if (!p)
4658 return nfserr_resource;
4659
29ae7f9d
AS		 4660 p = xdr_encode_hyper(p, write->wr_bytes_written);
4661 *p++ = cpu_to_be32(write->wr_stable_how);
4662 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4663 NFS4_VERIFIER_SIZE);
4664 return nfs_ok;
4665}
4666
51911868
OK		 4667static __be32
4668nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns)
4669{
bddfdbcd 4670 struct xdr_stream *xdr = resp->xdr;
51911868
OK		 4671 struct nfs42_netaddr *addr;
4672 __be32 *p;
4673
4674 p = xdr_reserve_space(xdr, 4);
4675 *p++ = cpu_to_be32(ns->nl4_type);
4676
4677 switch (ns->nl4_type) {
4678 case NL4_NETADDR:
4679 addr = &ns->u.nl4_addr;
4680
4681 /* netid_len, netid, uaddr_len, uaddr (port included
4682 * in RPCBIND_MAXUADDRLEN)
4683 */
4684 p = xdr_reserve_space(xdr,
4685 4 /* netid len */ +
4686 (XDR_QUADLEN(addr->netid_len) * 4) +
4687 4 /* uaddr len */ +
4688 (XDR_QUADLEN(addr->addr_len) * 4));
4689 if (!p)
4690 return nfserr_resource;
4691
4692 *p++ = cpu_to_be32(addr->netid_len);
4693 p = xdr_encode_opaque_fixed(p, addr->netid,
4694 addr->netid_len);
4695 *p++ = cpu_to_be32(addr->addr_len);
4696 p = xdr_encode_opaque_fixed(p, addr->addr,
4697 addr->addr_len);
4698 break;
4699 default:
4700 WARN_ON_ONCE(ns->nl4_type != NL4_NETADDR);
4701 return nfserr_inval;
4702 }
4703
4704 return 0;
4705}
4706
29ae7f9d
AS		 4707static __be32
4708nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4709 struct nfsd4_copy *copy)
4710{
4711 __be32 *p;
4712
e0639dc5 4713 nfserr = nfsd42_encode_write_res(resp, &copy->cp_res,
e8febea7 4714 !!copy->cp_synchronous);
bac966d6
BF		 4715 if (nfserr)
4716 return nfserr;
29ae7f9d 4717
bddfdbcd 4718 p = xdr_reserve_space(resp->xdr, 4 + 4);
edcc8452 4719 *p++ = xdr_one; /* cr_consecutive */
bac966d6
BF		 4720 *p++ = cpu_to_be32(copy->cp_synchronous);
4721 return 0;
29ae7f9d
AS		 4722}
4723
6308bc98
OK		 4724static __be32
4725nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
4726 struct nfsd4_offload_status *os)
4727{
bddfdbcd 4728 struct xdr_stream *xdr = resp->xdr;
6308bc98
OK		 4729 __be32 *p;
4730
4731 p = xdr_reserve_space(xdr, 8 + 4);
4732 if (!p)
4733 return nfserr_resource;
4734 p = xdr_encode_hyper(p, os->count);
4735 *p++ = cpu_to_be32(0);
528b8493
AS		 4736 return nfserr;
4737}
4738
4739static __be32
4740nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp,
4741 struct nfsd4_read *read,
9f0b5792
AS		 4742 unsigned long *maxcount, u32 *eof,
4743 loff_t *pos)
528b8493 4744{
bddfdbcd 4745 struct xdr_stream *xdr = resp->xdr;
528b8493
AS		 4746 struct file *file = read->rd_nf->nf_file;
4747 int starting_len = xdr->buf->len;
9f0b5792 4748 loff_t hole_pos;
528b8493
AS		 4749 __be32 nfserr;
4750 __be32 *p, tmp;
4751 __be64 tmp64;
4752
9f0b5792 4753 hole_pos = pos ? *pos : vfs_llseek(file, read->rd_offset, SEEK_HOLE);
2db27992 4754 if (hole_pos > read->rd_offset)
278765ea
AS		 4755 *maxcount = min_t(unsigned long, *maxcount, hole_pos - read->rd_offset);
4756 *maxcount = min_t(unsigned long, *maxcount, (xdr->buf->buflen - xdr->buf->len));
528b8493
AS		 4757
4758 /* Content type, offset, byte count */
4759 p = xdr_reserve_space(xdr, 4 + 8 + 4);
4760 if (!p)
4761 return nfserr_resource;
4762
278765ea 4763 read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, *maxcount);
528b8493
AS		 4764 if (read->rd_vlen < 0)
4765 return nfserr_resource;
4766
4767 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
278765ea 4768 resp->rqstp->rq_vec, read->rd_vlen, maxcount, eof);
528b8493
AS		 4769 if (nfserr)
4770 return nfserr;
72d78717 4771 xdr_truncate_encode(xdr, starting_len + 16 + xdr_align_size(*maxcount));
528b8493
AS		 4772
4773 tmp = htonl(NFS4_CONTENT_DATA);
4774 write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
4775 tmp64 = cpu_to_be64(read->rd_offset);
4776 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp64, 8);
278765ea 4777 tmp = htonl(*maxcount);
528b8493 4778 write_bytes_to_xdr_buf(xdr->buf, starting_len + 12, &tmp, 4);
72d78717
TM		 4779
4780 tmp = xdr_zero;
4781 write_bytes_to_xdr_buf(xdr->buf, starting_len + 16 + *maxcount, &tmp,
4782 xdr_pad_size(*maxcount));
528b8493
AS		 4783 return nfs_ok;
4784}
4785
2db27992
AS		 4786static __be32
4787nfsd4_encode_read_plus_hole(struct nfsd4_compoundres *resp,
4788 struct nfsd4_read *read,
278765ea 4789 unsigned long *maxcount, u32 *eof)
2db27992
AS		 4790{
4791 struct file *file = read->rd_nf->nf_file;
278765ea 4792 loff_t data_pos = vfs_llseek(file, read->rd_offset, SEEK_DATA);
9f0b5792 4793 loff_t f_size = i_size_read(file_inode(file));
278765ea 4794 unsigned long count;
2db27992
AS		 4795 __be32 *p;
4796
278765ea 4797 if (data_pos == -ENXIO)
9f0b5792
AS		 4798 data_pos = f_size;
4799 else if (data_pos <= read->rd_offset || (data_pos < f_size && data_pos % PAGE_SIZE))
4800 return nfsd4_encode_read_plus_data(resp, read, maxcount, eof, &f_size);
278765ea
AS		 4801 count = data_pos - read->rd_offset;
4802
2db27992 4803 /* Content type, offset, byte count */
bddfdbcd 4804 p = xdr_reserve_space(resp->xdr, 4 + 8 + 8);
2db27992
AS		 4805 if (!p)
4806 return nfserr_resource;
4807
4808 *p++ = htonl(NFS4_CONTENT_HOLE);
1e37d0e5
JC		 4809 p = xdr_encode_hyper(p, read->rd_offset);
4810 p = xdr_encode_hyper(p, count);
2db27992 4811
9f0b5792 4812 *eof = (read->rd_offset + count) >= f_size;
278765ea 4813 *maxcount = min_t(unsigned long, count, *maxcount);
2db27992
AS		 4814 return nfs_ok;
4815}
4816
528b8493
AS		 4817static __be32
4818nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr,
4819 struct nfsd4_read *read)
4820{
278765ea 4821 unsigned long maxcount, count;
bddfdbcd 4822 struct xdr_stream *xdr = resp->xdr;
528b8493
AS		 4823 struct file *file;
4824 int starting_len = xdr->buf->len;
9f0b5792 4825 int last_segment = xdr->buf->len;
528b8493
AS		 4826 int segments = 0;
4827 __be32 *p, tmp;
9f0b5792 4828 bool is_data;
2db27992 4829 loff_t pos;
528b8493
AS		 4830 u32 eof;
4831
4832 if (nfserr)
4833 return nfserr;
4834 file = read->rd_nf->nf_file;
4835
4836 /* eof flag, segment count */
4837 p = xdr_reserve_space(xdr, 4 + 4);
4838 if (!p)
4839 return nfserr_resource;
4840 xdr_commit_encode(xdr);
4841
0cb4d23a 4842 maxcount = min_t(unsigned long, read->rd_length,
528b8493 4843 (xdr->buf->buflen - xdr->buf->len));
278765ea 4844 count = maxcount;
528b8493
AS		 4845
4846 eof = read->rd_offset >= i_size_read(file_inode(file));
2db27992
AS		 4847 if (eof)
4848 goto out;
4849
9f0b5792
AS		 4850 pos = vfs_llseek(file, read->rd_offset, SEEK_HOLE);
4851 is_data = pos > read->rd_offset;
2db27992 4852
9f0b5792 4853 while (count > 0 && !eof) {
278765ea 4854 maxcount = count;
9f0b5792
AS		 4855 if (is_data)
4856 nfserr = nfsd4_encode_read_plus_data(resp, read, &maxcount, &eof,
4857 segments == 0 ? &pos : NULL);
4858 else
4859 nfserr = nfsd4_encode_read_plus_hole(resp, read, &maxcount, &eof);
278765ea
AS		 4860 if (nfserr)
4861 goto out;
4862 count -= maxcount;
4863 read->rd_offset += maxcount;
9f0b5792
AS		 4864 is_data = !is_data;
4865 last_segment = xdr->buf->len;
528b8493
AS		 4866 segments++;
4867 }
4868
2db27992 4869out:
278765ea 4870 if (nfserr && segments == 0)
528b8493
AS		 4871 xdr_truncate_encode(xdr, starting_len);
4872 else {
9f0b5792
AS		 4873 if (nfserr) {
4874 xdr_truncate_encode(xdr, last_segment);
4875 nfserr = nfs_ok;
b68f0cbd 4876 eof = 0;
9f0b5792 4877 }
b68f0cbd
TM		 4878 tmp = htonl(eof);
4879 write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
4880 tmp = htonl(segments);
4881 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
528b8493 4882 }
6308bc98
OK		 4883
4884 return nfserr;
4885}
4886
51911868
OK		 4887static __be32
4888nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr,
4889 struct nfsd4_copy_notify *cn)
4890{
bddfdbcd 4891 struct xdr_stream *xdr = resp->xdr;
51911868
OK		 4892 __be32 *p;
4893
4894 if (nfserr)
4895 return nfserr;
4896
4897 /* 8 sec, 4 nsec */
4898 p = xdr_reserve_space(xdr, 12);
4899 if (!p)
4900 return nfserr_resource;
4901
4902 /* cnr_lease_time */
4903 p = xdr_encode_hyper(p, cn->cpn_sec);
4904 *p++ = cpu_to_be32(cn->cpn_nsec);
4905
4906 /* cnr_stateid */
4907 nfserr = nfsd4_encode_stateid(xdr, &cn->cpn_cnr_stateid);
4908 if (nfserr)
4909 return nfserr;
4910
4911 /* cnr_src.nl_nsvr */
4912 p = xdr_reserve_space(xdr, 4);
4913 if (!p)
4914 return nfserr_resource;
4915
4916 *p++ = cpu_to_be32(1);
4917
4918 return nfsd42_encode_nl4_server(resp, &cn->cpn_src);
4919}
4920
24bab491
AS		 4921static __be32
4922nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4923 struct nfsd4_seek *seek)
4924{
4925 __be32 *p;
4926
bddfdbcd 4927 p = xdr_reserve_space(resp->xdr, 4 + 8);
24bab491
AS		 4928 *p++ = cpu_to_be32(seek->seek_eof);
4929 p = xdr_encode_hyper(p, seek->seek_pos);
4930
bac966d6 4931 return 0;
24bab491
AS		 4932}
4933
695e12f8
BH		 4934static __be32
4935nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4936{
4937 return nfserr;
4938}
4939
23e50fe3
FL		 4940/*
4941 * Encode kmalloc-ed buffer in to XDR stream.
4942 */
b9a49237 4943static __be32
23e50fe3
FL		 4944nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen)
4945{
4946 u32 cplen;
4947 __be32 *p;
4948
4949 cplen = min_t(unsigned long, buflen,
4950 ((void *)xdr->end - (void *)xdr->p));
4951 p = xdr_reserve_space(xdr, cplen);
4952 if (!p)
4953 return nfserr_resource;
4954
4955 memcpy(p, buf, cplen);
4956 buf += cplen;
4957 buflen -= cplen;
4958
4959 while (buflen) {
4960 cplen = min_t(u32, buflen, PAGE_SIZE);
4961 p = xdr_reserve_space(xdr, cplen);
4962 if (!p)
4963 return nfserr_resource;
4964
4965 memcpy(p, buf, cplen);
4966
4967 if (cplen < PAGE_SIZE) {
4968 /*
4969 * We're done, with a length that wasn't page
4970 * aligned, so possibly not word aligned. Pad
4971 * any trailing bytes with 0.
4972 */
4973 xdr_encode_opaque_fixed(p, NULL, cplen);
4974 break;
4975 }
4976
4977 buflen -= PAGE_SIZE;
4978 buf += PAGE_SIZE;
4979 }
4980
4981 return 0;
4982}
4983
4984static __be32
4985nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
4986 struct nfsd4_getxattr *getxattr)
4987{
bddfdbcd 4988 struct xdr_stream *xdr = resp->xdr;
23e50fe3
FL		 4989 __be32 *p, err;
4990
4991 p = xdr_reserve_space(xdr, 4);
4992 if (!p)
4993 return nfserr_resource;
4994
4995 *p = cpu_to_be32(getxattr->getxa_len);
4996
4997 if (getxattr->getxa_len == 0)
4998 return 0;
4999
5000 err = nfsd4_vbuf_to_stream(xdr, getxattr->getxa_buf,
5001 getxattr->getxa_len);
5002
5003 kvfree(getxattr->getxa_buf);
5004
5005 return err;
5006}
5007
5008static __be32
5009nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5010 struct nfsd4_setxattr *setxattr)
5011{
bddfdbcd 5012 struct xdr_stream *xdr = resp->xdr;
23e50fe3
FL		 5013 __be32 *p;
5014
5015 p = xdr_reserve_space(xdr, 20);
5016 if (!p)
5017 return nfserr_resource;
5018
5019 encode_cinfo(p, &setxattr->setxa_cinfo);
5020
5021 return 0;
5022}
5023
5024/*
5025 * See if there are cookie values that can be rejected outright.
5026 */
5027static __be32
5028nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs,
5029 u32 *offsetp)
5030{
5031 u64 cookie = listxattrs->lsxa_cookie;
5032
5033 /*
5034 * If the cookie is larger than the maximum number we can fit
5035 * in either the buffer we just got back from vfs_listxattr, or,
5036 * XDR-encoded, in the return buffer, it's invalid.
5037 */
5038 if (cookie > (listxattrs->lsxa_len) / (XATTR_USER_PREFIX_LEN + 2))
5039 return nfserr_badcookie;
5040
5041 if (cookie > (listxattrs->lsxa_maxcount /
5042 (XDR_QUADLEN(XATTR_USER_PREFIX_LEN + 2) + 4)))
5043 return nfserr_badcookie;
5044
5045 *offsetp = (u32)cookie;
5046 return 0;
5047}
5048
5049static __be32
5050nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
5051 struct nfsd4_listxattrs *listxattrs)
5052{
bddfdbcd 5053 struct xdr_stream *xdr = resp->xdr;
23e50fe3
FL		 5054 u32 cookie_offset, count_offset, eof;
5055 u32 left, xdrleft, slen, count;
5056 u32 xdrlen, offset;
5057 u64 cookie;
5058 char *sp;
b9a49237 5059 __be32 status, tmp;
23e50fe3
FL		 5060 __be32 *p;
5061 u32 nuser;
5062
5063 eof = 1;
5064
5065 status = nfsd4_listxattr_validate_cookie(listxattrs, &offset);
5066 if (status)
5067 goto out;
5068
5069 /*
5070 * Reserve space for the cookie and the name array count. Record
5071 * the offsets to save them later.
5072 */
5073 cookie_offset = xdr->buf->len;
5074 count_offset = cookie_offset + 8;
5075 p = xdr_reserve_space(xdr, 12);
5076 if (!p) {
5077 status = nfserr_resource;
5078 goto out;
5079 }
5080
5081 count = 0;
5082 left = listxattrs->lsxa_len;
5083 sp = listxattrs->lsxa_buf;
5084 nuser = 0;
5085
5086 xdrleft = listxattrs->lsxa_maxcount;
5087
5088 while (left > 0 && xdrleft > 0) {
5089 slen = strlen(sp);
5090
5091 /*
4cce11fa 5092 * Check if this is a "user." attribute, skip it if not.
23e50fe3
FL		 5093 */
5094 if (strncmp(sp, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
5095 goto contloop;
5096
5097 slen -= XATTR_USER_PREFIX_LEN;
5098 xdrlen = 4 + ((slen + 3) & ~3);
5099 if (xdrlen > xdrleft) {
5100 if (count == 0) {
5101 /*
5102 * Can't even fit the first attribute name.
5103 */
5104 status = nfserr_toosmall;
5105 goto out;
5106 }
5107 eof = 0;
5108 goto wreof;
5109 }
5110
5111 left -= XATTR_USER_PREFIX_LEN;
5112 sp += XATTR_USER_PREFIX_LEN;
5113 if (nuser++ < offset)
5114 goto contloop;
5115
5116
5117 p = xdr_reserve_space(xdr, xdrlen);
5118 if (!p) {
5119 status = nfserr_resource;
5120 goto out;
5121 }
5122
e2a1840e 5123 xdr_encode_opaque(p, sp, slen);
23e50fe3
FL		 5124
5125 xdrleft -= xdrlen;
5126 count++;
5127contloop:
5128 sp += slen + 1;
5129 left -= slen + 1;
5130 }
5131
5132 /*
5133 * If there were user attributes to copy, but we didn't copy
5134 * any, the offset was too large (e.g. the cookie was invalid).
5135 */
5136 if (nuser > 0 && count == 0) {
5137 status = nfserr_badcookie;
5138 goto out;
5139 }
5140
5141wreof:
5142 p = xdr_reserve_space(xdr, 4);
5143 if (!p) {
5144 status = nfserr_resource;
5145 goto out;
5146 }
5147 *p = cpu_to_be32(eof);
5148
5149 cookie = offset + count;
5150
5151 write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &cookie, 8);
b9a49237
CL		 5152 tmp = cpu_to_be32(count);
5153 write_bytes_to_xdr_buf(xdr->buf, count_offset, &tmp, 4);
23e50fe3
FL		 5154out:
5155 if (listxattrs->lsxa_len)
5156 kvfree(listxattrs->lsxa_buf);
5157 return status;
5158}
5159
5160static __be32
5161nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5162 struct nfsd4_removexattr *removexattr)
5163{
bddfdbcd 5164 struct xdr_stream *xdr = resp->xdr;
23e50fe3
FL		 5165 __be32 *p;
5166
5167 p = xdr_reserve_space(xdr, 20);
5168 if (!p)
5169 return nfserr_resource;
5170
5171 p = encode_cinfo(p, &removexattr->rmxa_cinfo);
5172 return 0;
5173}
5174
695e12f8
BH		 5175typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
5176
2db134eb
AA		 5177/*
5178 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
5179 * since we don't need to filter out obsolete ops as this is
5180 * done in the decoding phase.
5181 */
c1df609d 5182static const nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 5183 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
5184 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
5185 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
5186 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
5187 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
5188 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
5189 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
5190 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
5191 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
5192 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
5193 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
5194 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
5195 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
5196 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
5197 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
5198 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 5199 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 5200 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
5201 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
5202 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
5203 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
5204 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
5205 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
5206 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
5207 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
5208 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
5209 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
5210 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
5211 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
5212 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
5213 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
5214 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
5215 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
5216 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
5217 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
5218 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
5219 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 5220
5221 /* NFSv4.1 operations */
5222 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 5223 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 5224 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
5225 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 5226 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
5227 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb 5228 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc
CH		 5229#ifdef CONFIG_NFSD_PNFS
5230 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
5231 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
5232 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
5233 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
5234 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
5235#else
2db134eb
AA		 5236 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
5237 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
5238 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
5239 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
5240 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc 5241#endif
22b6dee8 5242 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 5243 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
5244 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 5245 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 5246 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
5247 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
5248 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
87a15a80
AS		 5249
5250 /* NFSv4.2 operations */
5251 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
29ae7f9d 5252 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
51911868 5253 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_copy_notify,
87a15a80
AS		 5254 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
5255 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
5256 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
5257 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
5258 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
6308bc98 5259 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status,
528b8493 5260 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_read_plus,
24bab491 5261 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
87a15a80 5262 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
ffa0160a 5263 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
23e50fe3
FL		 5264
5265 /* RFC 8276 extended atributes operations */
5266 [OP_GETXATTR] = (nfsd4_enc)nfsd4_encode_getxattr,
5267 [OP_SETXATTR] = (nfsd4_enc)nfsd4_encode_setxattr,
5268 [OP_LISTXATTRS] = (nfsd4_enc)nfsd4_encode_listxattrs,
5269 [OP_REMOVEXATTR] = (nfsd4_enc)nfsd4_encode_removexattr,
695e12f8
BH		 5270};
5271
496c262c 5272/*
a8095f7e
BF		 5273 * Calculate whether we still have space to encode repsize bytes.
5274 * There are two considerations:
5275 * - For NFS versions >=4.1, the size of the reply must stay within
5276 * session limits
5277 * - For all NFS versions, we must stay within limited preallocated
5278 * buffer space.
496c262c 5279 *
a8095f7e
BF		 5280 * This is called before the operation is processed, so can only provide
5281 * an upper estimate. For some nonidempotent operations (such as
5282 * getattr), it's not necessarily a problem if that estimate is wrong,
5283 * as we can fail it after processing without significant side effects.
496c262c 5284 */
a8095f7e 5285__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 5286{
67492c99 5287 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 5288 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 5289
47ee5298
BF		 5290 if (buf->len + respsize <= buf->buflen)
5291 return nfs_ok;
5292 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 5293 return nfserr_resource;
47ee5298
BF		 5294 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
5295 WARN_ON_ONCE(1);
5296 return nfserr_rep_too_big_to_cache;
ea8d7720 5297 }
47ee5298 5298 return nfserr_rep_too_big;
496c262c
AA		 5299}
5300
1da177e4
LT		 5301void
5302nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
5303{
bddfdbcd 5304 struct xdr_stream *xdr = resp->xdr;
9411b1d4 5305 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 5306 struct svc_rqst *rqstp = resp->rqstp;
34b1744c 5307 const struct nfsd4_operation *opdesc = op->opdesc;
082d4bd7 5308 int post_err_offset;
07d1f802 5309 nfsd4_enc encoder;
bc749ca4 5310 __be32 *p;
1da177e4 5311
d0a381dd
BF		 5312 p = xdr_reserve_space(xdr, 8);
5313 if (!p) {
5314 WARN_ON_ONCE(1);
5315 return;
5316 }
c373b0a4 5317 *p++ = cpu_to_be32(op->opnum);
082d4bd7 5318 post_err_offset = xdr->buf->len;
1da177e4 5319
695e12f8
BH		 5320 if (op->opnum == OP_ILLEGAL)
5321 goto status;
b7571e4c
BF		 5322 if (op->status && opdesc &&
5323 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
5324 goto status;
3a237b4a 5325 BUG_ON(op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
695e12f8 5326 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 5327 encoder = nfsd4_enc_ops[op->opnum];
5328 op->status = encoder(resp, op->status, &op->u);
08281341
CL		 5329 if (op->status)
5330 trace_nfsd_compound_encode_err(rqstp, op->opnum, op->status);
34b1744c
BF		 5331 if (opdesc && opdesc->op_release)
5332 opdesc->op_release(&op->u);
2825a7f9
BF		 5333 xdr_commit_encode(xdr);
5334
067e1ace 5335 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 5336 if (!op->status) {
5337 int space_needed = 0;
5338 if (!nfsd4_last_compound_op(rqstp))
5339 space_needed = COMPOUND_ERR_SLACK_SPACE;
5340 op->status = nfsd4_check_resp_size(resp, space_needed);
5341 }
c8f13d97
BF		 5342 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
5343 struct nfsd4_slot *slot = resp->cstate.slot;
5344
5345 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
5346 op->status = nfserr_rep_too_big_to_cache;
5347 else
5348 op->status = nfserr_rep_too_big;
5349 }
07d1f802
BF		 5350 if (op->status == nfserr_resource ||
5351 op->status == nfserr_rep_too_big ||
5352 op->status == nfserr_rep_too_big_to_cache) {
5353 /*
5354 * The operation may have already been encoded or
5355 * partially encoded. No op returns anything additional
5356 * in the case of one of these three errors, so we can
5357 * just truncate back to after the status. But it's a
5358 * bug if we had to do this on a non-idempotent op:
5359 */
5360 warn_on_nonidempotent_op(op);
082d4bd7 5361 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 5362 }
9411b1d4 5363 if (so) {
082d4bd7
BF		 5364 int len = xdr->buf->len - post_err_offset;
5365
9411b1d4 5366 so->so_replay.rp_status = op->status;
082d4bd7
BF		 5367 so->so_replay.rp_buflen = len;
5368 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
5369 so->so_replay.rp_buf, len);
9411b1d4 5370 }
695e12f8 5371status:
095a764b 5372 *p = op->status;
1da177e4
LT		 5373}
5374
5375/*
5376 * Encode the reply stored in the stateowner reply cache
5377 *
5378 * XDR note: do not encode rp->rp_buflen: the buffer contains the
5379 * previously sent already encoded operation.
1da177e4
LT		 5380 */
5381void
d0a381dd 5382nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 5383{
bc749ca4 5384 __be32 *p;
1da177e4
LT		 5385 struct nfs4_replay *rp = op->replay;
5386
d0a381dd
BF		 5387 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
5388 if (!p) {
5389 WARN_ON_ONCE(1);
5390 return;
5391 }
c373b0a4 5392 *p++ = cpu_to_be32(op->opnum);
1da177e4 5393 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 5394
0c0c267b 5395 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 5396}
5397
8537488b 5398void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
1da177e4 5399{
3e98abff
BF		 5400 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5401
1da177e4
LT		 5402 if (args->ops != args->iops) {
5403 kfree(args->ops);
5404 args->ops = args->iops;
5405 }
1da177e4 5406 while (args->to_free) {
d5e23383 5407 struct svcxdr_tmpbuf *tb = args->to_free;
1da177e4 5408 args->to_free = tb->next;
1da177e4
LT		 5409 kfree(tb);
5410 }
5411}
5412
c44b31c2 5413bool
16c66364 5414nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
1da177e4 5415{
026fec7e
CH		 5416 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5417
c1346a12 5418 /* svcxdr_tmp_alloc */
1da177e4 5419 args->to_free = NULL;
c1346a12 5420
16c66364 5421 args->xdr = xdr;
1da177e4
LT		 5422 args->ops = args->iops;
5423 args->rqstp = rqstp;
5424
d9b74bda 5425 return nfsd4_decode_compound(args);
1da177e4
LT		 5426}
5427
130e2054 5428bool
fda49441 5429nfs4svc_encode_compoundres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
1da177e4 5430{
63f8de37 5431 struct nfsd4_compoundres *resp = rqstp->rq_resp;
fda49441
CL		 5432 struct xdr_buf *buf = xdr->buf;
5433 __be32 *p;
6ac90391
BF		 5434
5435 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
5436 buf->tail[0].iov_len);
dd97fdde 5437
3b0ebb25
CL		 5438 /*
5439 * Send buffer space for the following items is reserved
5440 * at the top of nfsd4_proc_compound().
5441 */
5442 p = resp->statusp;
5443
5444 *p++ = resp->cstate.status;
cc028a10 5445
fda49441 5446 rqstp->rq_next_page = xdr->page_ptr + 1;
2825a7f9 5447
1da177e4
LT		 5448 *p++ = htonl(resp->taglen);
5449 memcpy(p, resp->tag, resp->taglen);
5450 p += XDR_QUADLEN(resp->taglen);
5451 *p++ = htonl(resp->opcnt);
5452
b607664e 5453 nfsd4_sequence_done(resp);
130e2054 5454 return true;
1da177e4 5455}
Linux 6.x block layer and io_uring tree(s)