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Merge tag 'cgroup-for-6.8-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel...
[linux.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <[email protected]>
8 * Andy Adamson <[email protected]>
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 44#include <linux/xattr.h>
80e591ce
CL		 45#include <linux/vmalloc.h>
46
23e50fe3 47#include <uapi/linux/xattr.h>
9a74af21 48
2ca72e17
BF		 49#include "idmap.h"
50#include "acl.h"
9a74af21 51#include "xdr4.h"
0a3adade 52#include "vfs.h"
17456804 53#include "state.h"
1091006c 54#include "cache.h"
3d733711 55#include "netns.h"
9cf514cc 56#include "pnfs.h"
5c4583b2 57#include "filecache.h"
2ca72e17 58
08281341
CL		 59#include "trace.h"
60
18032ca0
DQ		 61#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
62#include <linux/security.h>
63#endif
64
65
1da177e4
LT		 66#define NFSDDBG_FACILITY NFSDDBG_XDR
67
5cf23dbb 68const u32 nfsd_suppattrs[3][3] = {
916d2d84
BF		 69 {NFSD4_SUPPORTED_ATTRS_WORD0,
70 NFSD4_SUPPORTED_ATTRS_WORD1,
71 NFSD4_SUPPORTED_ATTRS_WORD2},
72
73 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
74 NFSD4_1_SUPPORTED_ATTRS_WORD1,
75 NFSD4_1_SUPPORTED_ATTRS_WORD2},
76
77 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
78 NFSD4_1_SUPPORTED_ATTRS_WORD1,
79 NFSD4_2_SUPPORTED_ATTRS_WORD2},
80};
81
42ca0993
BF		 82/*
83 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
84 * directory in order to indicate to the client that a filesystem boundary is present
85 * We use a fixed fsid for a referral
86 */
87#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
88#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
89
b37ad28b 90static __be32
a36b1725 91check_filename(char *str, int len)
1da177e4
LT		 92{
93 int i;
94
95 if (len == 0)
96 return nfserr_inval;
000dfa18
CL		 97 if (len > NFS4_MAXNAMLEN)
98 return nfserr_nametoolong;
1da177e4 99 if (isdotent(str, len))
a36b1725 100 return nfserr_badname;
1da177e4
LT		 101 for (i = 0; i < len; i++)
102 if (str[i] == '/')
a36b1725 103 return nfserr_badname;
1da177e4
LT		 104 return 0;
105}
106
60adfc50
AA		 107static int zero_clientid(clientid_t *clid)
108{
109 return (clid->cl_boot == 0) && (clid->cl_id == 0);
110}
111
2d8498db 112/**
d5e23383 113 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
ce043ac8 114 * @argp: NFSv4 compound argument structure
ed992753 115 * @len: length of buffer to allocate
2d8498db 116 *
ed992753
TM		 117 * Allocates a buffer of size @len to be freed when processing the compound
118 * operation described in @argp finishes.
2d8498db 119 */
d5e23383
BF		 120static void *
121svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
1da177e4 122{
d5e23383 123 struct svcxdr_tmpbuf *tb;
1da177e4 124
d5e23383 125 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
1da177e4 126 if (!tb)
d5e23383 127 return NULL;
1da177e4
LT		 128 tb->next = argp->to_free;
129 argp->to_free = tb;
d5e23383 130 return tb->buf;
1da177e4
LT		 131}
132
29c353b3
BF		 133/*
134 * For xdr strings that need to be passed to other kernel api's
135 * as null-terminated strings.
136 *
137 * Note null-terminating in place usually isn't safe since the
138 * buffer might end on a page boundary.
139 */
140static char *
141svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
142{
d5e23383 143 char *p = svcxdr_tmpalloc(argp, len + 1);
29c353b3
BF		 144
145 if (!p)
146 return NULL;
147 memcpy(p, buf, len);
148 p[len] = '\0';
29c353b3 149 return p;
1da177e4
LT		 150}
151
7b723008
CL		 152static void *
153svcxdr_savemem(struct nfsd4_compoundargs *argp, __be32 *p, u32 len)
154{
155 __be32 *tmp;
156
157 /*
158 * The location of the decoded data item is stable,
159 * so @p is OK to use. This is the common case.
160 */
161 if (p != argp->xdr->scratch.iov_base)
162 return p;
163
164 tmp = svcxdr_tmpalloc(argp, len);
165 if (!tmp)
166 return NULL;
167 memcpy(tmp, p, len);
168 return tmp;
169}
170
5dcbfabb
CL		 171/*
172 * NFSv4 basic data type decoders
173 */
174
1a994408
CL		 175/*
176 * This helper handles variable-length opaques which belong to protocol
177 * elements that this implementation does not support.
178 */
179static __be32
180nfsd4_decode_ignored_string(struct nfsd4_compoundargs *argp, u32 maxlen)
181{
182 u32 len;
183
184 if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
185 return nfserr_bad_xdr;
186 if (maxlen && len > maxlen)
187 return nfserr_bad_xdr;
188 if (!xdr_inline_decode(argp->xdr, len))
189 return nfserr_bad_xdr;
190
191 return nfs_ok;
192}
193
5dcbfabb
CL		 194static __be32
195nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
196{
197 __be32 *p;
198 u32 len;
199
200 if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
201 return nfserr_bad_xdr;
202 if (len == 0 || len > NFS4_OPAQUE_LIMIT)
203 return nfserr_bad_xdr;
204 p = xdr_inline_decode(argp->xdr, len);
205 if (!p)
206 return nfserr_bad_xdr;
7b723008 207 o->data = svcxdr_savemem(argp, p, len);
5dcbfabb
CL		 208 if (!o->data)
209 return nfserr_jukebox;
210 o->len = len;
5dcbfabb
CL		 211
212 return nfs_ok;
213}
214
000dfa18
CL		 215static __be32
216nfsd4_decode_component4(struct nfsd4_compoundargs *argp, char **namp, u32 *lenp)
217{
218 __be32 *p, status;
219
220 if (xdr_stream_decode_u32(argp->xdr, lenp) < 0)
221 return nfserr_bad_xdr;
222 p = xdr_inline_decode(argp->xdr, *lenp);
223 if (!p)
224 return nfserr_bad_xdr;
225 status = check_filename((char *)p, *lenp);
226 if (status)
227 return status;
7b723008 228 *namp = svcxdr_savemem(argp, p, *lenp);
000dfa18
CL		 229 if (!*namp)
230 return nfserr_jukebox;
000dfa18
CL		 231
232 return nfs_ok;
233}
234
1c3eff7e
CL		 235static __be32
236nfsd4_decode_nfstime4(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
237{
238 __be32 *p;
239
240 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 3);
241 if (!p)
242 return nfserr_bad_xdr;
243 p = xdr_decode_hyper(p, &tv->tv_sec);
244 tv->tv_nsec = be32_to_cpup(p++);
245 if (tv->tv_nsec >= (u32)1000000000)
246 return nfserr_inval;
247 return nfs_ok;
248}
249
796dd1c6
CL		 250static __be32
251nfsd4_decode_verifier4(struct nfsd4_compoundargs *argp, nfs4_verifier *verf)
252{
253 __be32 *p;
254
255 p = xdr_inline_decode(argp->xdr, NFS4_VERIFIER_SIZE);
256 if (!p)
257 return nfserr_bad_xdr;
258 memcpy(verf->data, p, sizeof(verf->data));
259 return nfs_ok;
260}
261
d1c263a0
CL		 262/**
263 * nfsd4_decode_bitmap4 - Decode an NFSv4 bitmap4
264 * @argp: NFSv4 compound argument structure
265 * @bmval: pointer to an array of u32's to decode into
266 * @bmlen: size of the @bmval array
267 *
268 * The server needs to return nfs_ok rather than nfserr_bad_xdr when
269 * encountering bitmaps containing bits it does not recognize. This
270 * includes bits in bitmap words past WORDn, where WORDn is the last
271 * bitmap WORD the implementation currently supports. Thus we are
272 * careful here to simply ignore bits in bitmap words that this
273 * implementation has yet to support explicitly.
274 *
275 * Return values:
276 * %nfs_ok: @bmval populated successfully
277 * %nfserr_bad_xdr: the encoded bitmap was invalid
278 */
279static __be32
280nfsd4_decode_bitmap4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen)
281{
cd2e999c 282 ssize_t status;
d1c263a0 283
cd2e999c
CL		 284 status = xdr_stream_decode_uint32_array(argp->xdr, bmval, bmlen);
285 return status == -EBADMSG ? nfserr_bad_xdr : nfs_ok;
d1c263a0
CL		 286}
287
c941a968
CL		 288static __be32
289nfsd4_decode_nfsace4(struct nfsd4_compoundargs *argp, struct nfs4_ace *ace)
290{
291 __be32 *p, status;
292 u32 length;
293
294 if (xdr_stream_decode_u32(argp->xdr, &ace->type) < 0)
295 return nfserr_bad_xdr;
296 if (xdr_stream_decode_u32(argp->xdr, &ace->flag) < 0)
297 return nfserr_bad_xdr;
298 if (xdr_stream_decode_u32(argp->xdr, &ace->access_mask) < 0)
299 return nfserr_bad_xdr;
300
301 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
302 return nfserr_bad_xdr;
303 p = xdr_inline_decode(argp->xdr, length);
304 if (!p)
305 return nfserr_bad_xdr;
306 ace->whotype = nfs4_acl_get_whotype((char *)p, length);
307 if (ace->whotype != NFS4_ACL_WHO_NAMED)
308 status = nfs_ok;
309 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
310 status = nfsd_map_name_to_gid(argp->rqstp,
311 (char *)p, length, &ace->who_gid);
312 else
313 status = nfsd_map_name_to_uid(argp->rqstp,
314 (char *)p, length, &ace->who_uid);
315
316 return status;
317}
318
319/* A counted array of nfsace4's */
320static noinline __be32
321nfsd4_decode_acl(struct nfsd4_compoundargs *argp, struct nfs4_acl **acl)
322{
323 struct nfs4_ace *ace;
324 __be32 status;
325 u32 count;
326
327 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
328 return nfserr_bad_xdr;
329
330 if (count > xdr_stream_remaining(argp->xdr) / 20)
331 /*
332 * Even with 4-byte names there wouldn't be
333 * space for that many aces; something fishy is
334 * going on:
335 */
336 return nfserr_fbig;
337
338 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(count));
339 if (*acl == NULL)
340 return nfserr_jukebox;
341
342 (*acl)->naces = count;
343 for (ace = (*acl)->aces; ace < (*acl)->aces + count; ace++) {
344 status = nfsd4_decode_nfsace4(argp, ace);
345 if (status)
346 return status;
347 }
348
349 return nfs_ok;
350}
351
dabe9182
CL		 352static noinline __be32
353nfsd4_decode_security_label(struct nfsd4_compoundargs *argp,
354 struct xdr_netobj *label)
355{
356 u32 lfs, pi, length;
357 __be32 *p;
358
359 if (xdr_stream_decode_u32(argp->xdr, &lfs) < 0)
360 return nfserr_bad_xdr;
361 if (xdr_stream_decode_u32(argp->xdr, &pi) < 0)
362 return nfserr_bad_xdr;
363
364 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
365 return nfserr_bad_xdr;
366 if (length > NFS4_MAXLABELLEN)
367 return nfserr_badlabel;
368 p = xdr_inline_decode(argp->xdr, length);
369 if (!p)
370 return nfserr_bad_xdr;
371 label->len = length;
372 label->data = svcxdr_dupstr(argp, p, length);
373 if (!label->data)
374 return nfserr_jukebox;
375
376 return nfs_ok;
377}
378
b37ad28b 379static __be32
d1c263a0
CL		 380nfsd4_decode_fattr4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen,
381 struct iattr *iattr, struct nfs4_acl **acl,
382 struct xdr_netobj *label, int *umask)
1da177e4 383{
081d53fe
CL		 384 unsigned int starting_pos;
385 u32 attrlist4_count;
d1c263a0 386 __be32 *p, status;
1da177e4 387
1da177e4 388 iattr->ia_valid = 0;
d1c263a0
CL		 389 status = nfsd4_decode_bitmap4(argp, bmval, bmlen);
390 if (status)
391 return nfserr_bad_xdr;
1da177e4 392
e864c189
BF		 393 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
394 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
395 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
396 if (nfsd_attrs_supported(argp->minorversion, bmval))
397 return nfserr_inval;
398 return nfserr_attrnotsupp;
399 }
400
081d53fe
CL		 401 if (xdr_stream_decode_u32(argp->xdr, &attrlist4_count) < 0)
402 return nfserr_bad_xdr;
403 starting_pos = xdr_stream_pos(argp->xdr);
1da177e4
LT		 404
405 if (bmval[0] & FATTR4_WORD0_SIZE) {
2ac1b9b2
CL		 406 u64 size;
407
408 if (xdr_stream_decode_u64(argp->xdr, &size) < 0)
409 return nfserr_bad_xdr;
410 iattr->ia_size = size;
1da177e4
LT		 411 iattr->ia_valid |= ATTR_SIZE;
412 }
413 if (bmval[0] & FATTR4_WORD0_ACL) {
c941a968
CL		 414 status = nfsd4_decode_acl(argp, acl);
415 if (status)
416 return status;
1da177e4
LT		 417 } else
418 *acl = NULL;
419 if (bmval[1] & FATTR4_WORD1_MODE) {
1c8f0ad7
CL		 420 u32 mode;
421
422 if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
423 return nfserr_bad_xdr;
424 iattr->ia_mode = mode;
1da177e4
LT		 425 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
426 iattr->ia_valid |= ATTR_MODE;
427 }
428 if (bmval[1] & FATTR4_WORD1_OWNER) {
9853a5ac
CL		 429 u32 length;
430
431 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
432 return nfserr_bad_xdr;
433 p = xdr_inline_decode(argp->xdr, length);
434 if (!p)
435 return nfserr_bad_xdr;
436 status = nfsd_map_name_to_uid(argp->rqstp, (char *)p, length,
437 &iattr->ia_uid);
438 if (status)
47c85291 439 return status;
1da177e4
LT		 440 iattr->ia_valid |= ATTR_UID;
441 }
442 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
393c31dd
CL		 443 u32 length;
444
445 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
446 return nfserr_bad_xdr;
447 p = xdr_inline_decode(argp->xdr, length);
448 if (!p)
449 return nfserr_bad_xdr;
450 status = nfsd_map_name_to_gid(argp->rqstp, (char *)p, length,
451 &iattr->ia_gid);
452 if (status)
47c85291 453 return status;
1da177e4
LT		 454 iattr->ia_valid |= ATTR_GID;
455 }
456 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1c3eff7e
CL		 457 u32 set_it;
458
459 if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
460 return nfserr_bad_xdr;
461 switch (set_it) {
1da177e4 462 case NFS4_SET_TO_CLIENT_TIME:
1c3eff7e 463 status = nfsd4_decode_nfstime4(argp, &iattr->ia_atime);
4c94e13e
CH		 464 if (status)
465 return status;
1da177e4
LT		 466 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
467 break;
468 case NFS4_SET_TO_SERVER_TIME:
469 iattr->ia_valid |= ATTR_ATIME;
470 break;
471 default:
1c3eff7e 472 return nfserr_bad_xdr;
1da177e4
LT		 473 }
474 }
5b2f3e07
CL		 475 if (bmval[1] & FATTR4_WORD1_TIME_CREATE) {
476 struct timespec64 ts;
477
478 /* No Linux filesystem supports setting this attribute. */
479 bmval[1] &= ~FATTR4_WORD1_TIME_CREATE;
480 status = nfsd4_decode_nfstime4(argp, &ts);
481 if (status)
482 return status;
483 }
1da177e4 484 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1c3eff7e
CL		 485 u32 set_it;
486
487 if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
488 return nfserr_bad_xdr;
489 switch (set_it) {
1da177e4 490 case NFS4_SET_TO_CLIENT_TIME:
1c3eff7e 491 status = nfsd4_decode_nfstime4(argp, &iattr->ia_mtime);
4c94e13e
CH		 492 if (status)
493 return status;
1da177e4
LT		 494 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
495 break;
496 case NFS4_SET_TO_SERVER_TIME:
497 iattr->ia_valid |= ATTR_MTIME;
498 break;
499 default:
1c3eff7e 500 return nfserr_bad_xdr;
1da177e4
LT		 501 }
502 }
18032ca0 503 label->len = 0;
2285ae76
AB		 504 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
505 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
dabe9182
CL		 506 status = nfsd4_decode_security_label(argp, label);
507 if (status)
508 return status;
18032ca0 509 }
47057abd 510 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
66f0476c
CL		 511 u32 mode, mask;
512
47057abd 513 if (!umask)
66f0476c
CL		 514 return nfserr_bad_xdr;
515 if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
516 return nfserr_bad_xdr;
517 iattr->ia_mode = mode & (S_IFMT | S_IALLUGO);
518 if (xdr_stream_decode_u32(argp->xdr, &mask) < 0)
519 return nfserr_bad_xdr;
520 *umask = mask & S_IRWXUGO;
47057abd
AG		 521 iattr->ia_valid |= ATTR_MODE;
522 }
081d53fe
CL		 523
524 /* request sanity: did attrlist4 contain the expected number of words? */
525 if (attrlist4_count != xdr_stream_pos(argp->xdr) - starting_pos)
526 return nfserr_bad_xdr;
1da177e4 527
d1c263a0 528 return nfs_ok;
1da177e4
LT		 529}
530
d3d2f381
CL		 531static __be32
532nfsd4_decode_stateid4(struct nfsd4_compoundargs *argp, stateid_t *sid)
533{
534 __be32 *p;
535
536 p = xdr_inline_decode(argp->xdr, NFS4_STATEID_SIZE);
537 if (!p)
538 return nfserr_bad_xdr;
539 sid->si_generation = be32_to_cpup(p++);
540 memcpy(&sid->si_opaque, p, sizeof(sid->si_opaque));
541 return nfs_ok;
542}
543
144e8269
CL		 544static __be32
545nfsd4_decode_clientid4(struct nfsd4_compoundargs *argp, clientid_t *clientid)
546{
547 __be32 *p;
548
549 p = xdr_inline_decode(argp->xdr, sizeof(__be64));
550 if (!p)
551 return nfserr_bad_xdr;
552 memcpy(clientid, p, sizeof(*clientid));
553 return nfs_ok;
554}
555
556static __be32
557nfsd4_decode_state_owner4(struct nfsd4_compoundargs *argp,
558 clientid_t *clientid, struct xdr_netobj *owner)
559{
560 __be32 status;
561
562 status = nfsd4_decode_clientid4(argp, clientid);
563 if (status)
564 return status;
565 return nfsd4_decode_opaque(argp, owner);
566}
567
04495971
CL		 568#ifdef CONFIG_NFSD_PNFS
569static __be32
570nfsd4_decode_deviceid4(struct nfsd4_compoundargs *argp,
571 struct nfsd4_deviceid *devid)
572{
573 __be32 *p;
574
575 p = xdr_inline_decode(argp->xdr, NFS4_DEVICEID4_SIZE);
576 if (!p)
577 return nfserr_bad_xdr;
578 memcpy(devid, p, sizeof(*devid));
579 return nfs_ok;
580}
5185980d
CL		 581
582static __be32
583nfsd4_decode_layoutupdate4(struct nfsd4_compoundargs *argp,
584 struct nfsd4_layoutcommit *lcp)
585{
586 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_layout_type) < 0)
587 return nfserr_bad_xdr;
588 if (lcp->lc_layout_type < LAYOUT_NFSV4_1_FILES)
589 return nfserr_bad_xdr;
590 if (lcp->lc_layout_type >= LAYOUT_TYPE_MAX)
591 return nfserr_bad_xdr;
592
593 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_up_len) < 0)
594 return nfserr_bad_xdr;
595 if (lcp->lc_up_len > 0) {
596 lcp->lc_up_layout = xdr_inline_decode(argp->xdr, lcp->lc_up_len);
597 if (!lcp->lc_up_layout)
598 return nfserr_bad_xdr;
599 }
600
601 return nfs_ok;
602}
603
645fcad3
CL		 604static __be32
605nfsd4_decode_layoutreturn4(struct nfsd4_compoundargs *argp,
606 struct nfsd4_layoutreturn *lrp)
607{
608 __be32 status;
609
610 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_return_type) < 0)
611 return nfserr_bad_xdr;
612 switch (lrp->lr_return_type) {
613 case RETURN_FILE:
614 if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.offset) < 0)
615 return nfserr_bad_xdr;
616 if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.length) < 0)
617 return nfserr_bad_xdr;
618 status = nfsd4_decode_stateid4(argp, &lrp->lr_sid);
619 if (status)
620 return status;
621 if (xdr_stream_decode_u32(argp->xdr, &lrp->lrf_body_len) < 0)
622 return nfserr_bad_xdr;
623 if (lrp->lrf_body_len > 0) {
624 lrp->lrf_body = xdr_inline_decode(argp->xdr, lrp->lrf_body_len);
625 if (!lrp->lrf_body)
626 return nfserr_bad_xdr;
627 }
628 break;
629 case RETURN_FSID:
630 case RETURN_ALL:
631 lrp->lr_seg.offset = 0;
632 lrp->lr_seg.length = NFS4_MAX_UINT64;
633 break;
634 default:
635 return nfserr_bad_xdr;
636 }
637
638 return nfs_ok;
639}
640
04495971
CL		 641#endif /* CONFIG_NFSD_PNFS */
642
571e0451
CL		 643static __be32
644nfsd4_decode_sessionid4(struct nfsd4_compoundargs *argp,
645 struct nfs4_sessionid *sessionid)
646{
647 __be32 *p;
648
649 p = xdr_inline_decode(argp->xdr, NFS4_MAX_SESSIONID_LEN);
650 if (!p)
651 return nfserr_bad_xdr;
652 memcpy(sessionid->data, p, sizeof(sessionid->data));
653 return nfs_ok;
654}
655
1a994408
CL		 656/* Defined in Appendix A of RFC 5531 */
657static __be32
658nfsd4_decode_authsys_parms(struct nfsd4_compoundargs *argp,
659 struct nfsd4_cb_sec *cbs)
acb2887e 660{
1a994408
CL		 661 u32 stamp, gidcount, uid, gid;
662 __be32 *p, status;
663
664 if (xdr_stream_decode_u32(argp->xdr, &stamp) < 0)
665 return nfserr_bad_xdr;
666 /* machine name */
667 status = nfsd4_decode_ignored_string(argp, 255);
668 if (status)
669 return status;
670 if (xdr_stream_decode_u32(argp->xdr, &uid) < 0)
671 return nfserr_bad_xdr;
672 if (xdr_stream_decode_u32(argp->xdr, &gid) < 0)
673 return nfserr_bad_xdr;
674 if (xdr_stream_decode_u32(argp->xdr, &gidcount) < 0)
675 return nfserr_bad_xdr;
676 if (gidcount > 16)
677 return nfserr_bad_xdr;
678 p = xdr_inline_decode(argp->xdr, gidcount << 2);
679 if (!p)
680 return nfserr_bad_xdr;
681 if (cbs->flavor == (u32)(-1)) {
682 struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
683
684 kuid_t kuid = make_kuid(userns, uid);
685 kgid_t kgid = make_kgid(userns, gid);
686 if (uid_valid(kuid) && gid_valid(kgid)) {
687 cbs->uid = kuid;
688 cbs->gid = kgid;
689 cbs->flavor = RPC_AUTH_UNIX;
690 } else {
691 dprintk("RPC_AUTH_UNIX with invalid uid or gid, ignoring!\n");
692 }
693 }
694
695 return nfs_ok;
696}
697
698static __be32
699nfsd4_decode_gss_cb_handles4(struct nfsd4_compoundargs *argp,
700 struct nfsd4_cb_sec *cbs)
701{
702 __be32 status;
703 u32 service;
704
705 dprintk("RPC_AUTH_GSS callback secflavor not supported!\n");
706
707 if (xdr_stream_decode_u32(argp->xdr, &service) < 0)
708 return nfserr_bad_xdr;
709 if (service < RPC_GSS_SVC_NONE || service > RPC_GSS_SVC_PRIVACY)
710 return nfserr_bad_xdr;
711 /* gcbp_handle_from_server */
712 status = nfsd4_decode_ignored_string(argp, 0);
713 if (status)
714 return status;
715 /* gcbp_handle_from_client */
716 status = nfsd4_decode_ignored_string(argp, 0);
717 if (status)
718 return status;
719
720 return nfs_ok;
721}
722
723/* a counted array of callback_sec_parms4 items */
724static __be32
725nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
726{
727 u32 i, secflavor, nr_secflavs;
728 __be32 status;
acb2887e
BF		 729
730 /* callback_sec_params4 */
1a994408
CL		 731 if (xdr_stream_decode_u32(argp->xdr, &nr_secflavs) < 0)
732 return nfserr_bad_xdr;
57569a70
BF		 733 if (nr_secflavs)
734 cbs->flavor = (u32)(-1);
735 else
736 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
737 cbs->flavor = 0;
1a994408 738
acb2887e 739 for (i = 0; i < nr_secflavs; ++i) {
1a994408
CL		 740 if (xdr_stream_decode_u32(argp->xdr, &secflavor) < 0)
741 return nfserr_bad_xdr;
742 switch (secflavor) {
acb2887e 743 case RPC_AUTH_NULL:
1a994408 744 /* void */
12fc3e92
BF		 745 if (cbs->flavor == (u32)(-1))
746 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 747 break;
748 case RPC_AUTH_UNIX:
1a994408
CL		 749 status = nfsd4_decode_authsys_parms(argp, cbs);
750 if (status)
751 return status;
acb2887e
BF		 752 break;
753 case RPC_AUTH_GSS:
1a994408
CL		 754 status = nfsd4_decode_gss_cb_handles4(argp, cbs);
755 if (status)
756 return status;
acb2887e
BF		 757 break;
758 default:
acb2887e
BF		 759 return nfserr_inval;
760 }
761 }
1a994408
CL		 762
763 return nfs_ok;
acb2887e
BF		 764}
765
1a994408 766
d169a6a9
CL		 767/*
768 * NFSv4 operation argument decoders
769 */
770
771static __be32
772nfsd4_decode_access(struct nfsd4_compoundargs *argp,
e78e274e 773 union nfsd4_op_u *u)
d169a6a9 774{
e78e274e 775 struct nfsd4_access *access = &u->access;
d169a6a9
CL		 776 if (xdr_stream_decode_u32(argp->xdr, &access->ac_req_access) < 0)
777 return nfserr_bad_xdr;
778 return nfs_ok;
779}
780
b37ad28b 781static __be32
e78e274e 782nfsd4_decode_close(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 783{
e78e274e 784 struct nfsd4_close *close = &u->close;
d3d2f381
CL		 785 if (xdr_stream_decode_u32(argp->xdr, &close->cl_seqid) < 0)
786 return nfserr_bad_xdr;
787 return nfsd4_decode_stateid4(argp, &close->cl_stateid);
1da177e4
LT		 788}
789
790
b37ad28b 791static __be32
e78e274e 792nfsd4_decode_commit(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 793{
e78e274e 794 struct nfsd4_commit *commit = &u->commit;
cbd9abb3
CL		 795 if (xdr_stream_decode_u64(argp->xdr, &commit->co_offset) < 0)
796 return nfserr_bad_xdr;
797 if (xdr_stream_decode_u32(argp->xdr, &commit->co_count) < 0)
798 return nfserr_bad_xdr;
3fdc5464 799 memset(&commit->co_verf, 0, sizeof(commit->co_verf));
cbd9abb3 800 return nfs_ok;
1da177e4
LT		 801}
802
b37ad28b 803static __be32
e78e274e 804nfsd4_decode_create(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 805{
e78e274e 806 struct nfsd4_create *create = &u->create;
000dfa18 807 __be32 *p, status;
1da177e4 808
3fdc5464 809 memset(create, 0, sizeof(*create));
000dfa18
CL		 810 if (xdr_stream_decode_u32(argp->xdr, &create->cr_type) < 0)
811 return nfserr_bad_xdr;
1da177e4
LT		 812 switch (create->cr_type) {
813 case NF4LNK:
000dfa18
CL		 814 if (xdr_stream_decode_u32(argp->xdr, &create->cr_datalen) < 0)
815 return nfserr_bad_xdr;
816 p = xdr_inline_decode(argp->xdr, create->cr_datalen);
817 if (!p)
818 return nfserr_bad_xdr;
29c353b3 819 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
7fb84306 820 if (!create->cr_data)
76f47128 821 return nfserr_jukebox;
1da177e4
LT		 822 break;
823 case NF4BLK:
824 case NF4CHR:
000dfa18
CL		 825 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata1) < 0)
826 return nfserr_bad_xdr;
827 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata2) < 0)
828 return nfserr_bad_xdr;
1da177e4
LT		 829 break;
830 case NF4SOCK:
831 case NF4FIFO:
832 case NF4DIR:
833 default:
834 break;
835 }
000dfa18
CL		 836 status = nfsd4_decode_component4(argp, &create->cr_name,
837 &create->cr_namelen);
838 if (status)
1da177e4 839 return status;
d1c263a0
CL		 840 status = nfsd4_decode_fattr4(argp, create->cr_bmval,
841 ARRAY_SIZE(create->cr_bmval),
842 &create->cr_iattr, &create->cr_acl,
843 &create->cr_label, &create->cr_umask);
c0d6fc8a 844 if (status)
000dfa18 845 return status;
1da177e4 846
000dfa18 847 return nfs_ok;
1da177e4
LT		 848}
849
b37ad28b 850static inline __be32
e78e274e 851nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 852{
e78e274e 853 struct nfsd4_delegreturn *dr = &u->delegreturn;
95e6482c 854 return nfsd4_decode_stateid4(argp, &dr->dr_stateid);
1da177e4
LT		 855}
856
b37ad28b 857static inline __be32
e78e274e 858nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 859{
e78e274e 860 struct nfsd4_getattr *getattr = &u->getattr;
3fdc5464 861 memset(getattr, 0, sizeof(*getattr));
f759eff2
CL		 862 return nfsd4_decode_bitmap4(argp, getattr->ga_bmval,
863 ARRAY_SIZE(getattr->ga_bmval));
1da177e4
LT		 864}
865
b37ad28b 866static __be32
e78e274e 867nfsd4_decode_link(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 868{
e78e274e 869 struct nfsd4_link *link = &u->link;
3fdc5464 870 memset(link, 0, sizeof(*link));
5c505d12 871 return nfsd4_decode_component4(argp, &link->li_name, &link->li_namelen);
1da177e4
LT		 872}
873
8918cc0d
CL		 874static __be32
875nfsd4_decode_open_to_lock_owner4(struct nfsd4_compoundargs *argp,
876 struct nfsd4_lock *lock)
877{
878 __be32 status;
879
880 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_open_seqid) < 0)
881 return nfserr_bad_xdr;
882 status = nfsd4_decode_stateid4(argp, &lock->lk_new_open_stateid);
883 if (status)
884 return status;
885 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_lock_seqid) < 0)
886 return nfserr_bad_xdr;
887 return nfsd4_decode_state_owner4(argp, &lock->lk_new_clientid,
888 &lock->lk_new_owner);
889}
890
891static __be32
892nfsd4_decode_exist_lock_owner4(struct nfsd4_compoundargs *argp,
893 struct nfsd4_lock *lock)
894{
895 __be32 status;
896
897 status = nfsd4_decode_stateid4(argp, &lock->lk_old_lock_stateid);
898 if (status)
899 return status;
900 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_old_lock_seqid) < 0)
901 return nfserr_bad_xdr;
902
903 return nfs_ok;
904}
905
906static __be32
907nfsd4_decode_locker4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
908{
909 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_is_new) < 0)
910 return nfserr_bad_xdr;
911 if (lock->lk_is_new)
912 return nfsd4_decode_open_to_lock_owner4(argp, lock);
913 return nfsd4_decode_exist_lock_owner4(argp, lock);
914}
915
b37ad28b 916static __be32
e78e274e 917nfsd4_decode_lock(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 918{
e78e274e 919 struct nfsd4_lock *lock = &u->lock;
3fdc5464 920 memset(lock, 0, sizeof(*lock));
7c59deed
CL		 921 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_type) < 0)
922 return nfserr_bad_xdr;
1da177e4 923 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
7c59deed
CL		 924 return nfserr_bad_xdr;
925 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_reclaim) < 0)
926 return nfserr_bad_xdr;
927 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_offset) < 0)
928 return nfserr_bad_xdr;
929 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_length) < 0)
930 return nfserr_bad_xdr;
931 return nfsd4_decode_locker4(argp, lock);
1da177e4
LT		 932}
933
b37ad28b 934static __be32
e78e274e 935nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 936{
e78e274e 937 struct nfsd4_lockt *lockt = &u->lockt;
3fdc5464 938 memset(lockt, 0, sizeof(*lockt));
0a146f04
CL		 939 if (xdr_stream_decode_u32(argp->xdr, &lockt->lt_type) < 0)
940 return nfserr_bad_xdr;
941 if ((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
942 return nfserr_bad_xdr;
943 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_offset) < 0)
944 return nfserr_bad_xdr;
945 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_length) < 0)
946 return nfserr_bad_xdr;
947 return nfsd4_decode_state_owner4(argp, &lockt->lt_clientid,
948 &lockt->lt_owner);
1da177e4
LT		 949}
950
b37ad28b 951static __be32
e78e274e 952nfsd4_decode_locku(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 953{
e78e274e 954 struct nfsd4_locku *locku = &u->locku;
ca9cf9fc 955 __be32 status;
1da177e4 956
ca9cf9fc
CL		 957 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_type) < 0)
958 return nfserr_bad_xdr;
1da177e4 959 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
ca9cf9fc
CL		 960 return nfserr_bad_xdr;
961 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_seqid) < 0)
962 return nfserr_bad_xdr;
963 status = nfsd4_decode_stateid4(argp, &locku->lu_stateid);
e31a1b66
BH		 964 if (status)
965 return status;
ca9cf9fc
CL		 966 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_offset) < 0)
967 return nfserr_bad_xdr;
968 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_length) < 0)
969 return nfserr_bad_xdr;
1da177e4 970
ca9cf9fc 971 return nfs_ok;
1da177e4
LT		 972}
973
b37ad28b 974static __be32
e78e274e 975nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 976{
e78e274e 977 struct nfsd4_lookup *lookup = &u->lookup;
3d5877e8 978 return nfsd4_decode_component4(argp, &lookup->lo_name, &lookup->lo_len);
1da177e4
LT		 979}
980
bf33bab3
CL		 981static __be32
982nfsd4_decode_createhow4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
983{
984 __be32 status;
985
986 if (xdr_stream_decode_u32(argp->xdr, &open->op_createmode) < 0)
987 return nfserr_bad_xdr;
988 switch (open->op_createmode) {
989 case NFS4_CREATE_UNCHECKED:
990 case NFS4_CREATE_GUARDED:
991 status = nfsd4_decode_fattr4(argp, open->op_bmval,
992 ARRAY_SIZE(open->op_bmval),
993 &open->op_iattr, &open->op_acl,
994 &open->op_label, &open->op_umask);
995 if (status)
996 return status;
997 break;
998 case NFS4_CREATE_EXCLUSIVE:
999 status = nfsd4_decode_verifier4(argp, &open->op_verf);
1000 if (status)
1001 return status;
1002 break;
1003 case NFS4_CREATE_EXCLUSIVE4_1:
1004 if (argp->minorversion < 1)
1005 return nfserr_bad_xdr;
1006 status = nfsd4_decode_verifier4(argp, &open->op_verf);
1007 if (status)
1008 return status;
1009 status = nfsd4_decode_fattr4(argp, open->op_bmval,
1010 ARRAY_SIZE(open->op_bmval),
1011 &open->op_iattr, &open->op_acl,
1012 &open->op_label, &open->op_umask);
1013 if (status)
1014 return status;
1015 break;
1016 default:
1017 return nfserr_bad_xdr;
1018 }
1019
1020 return nfs_ok;
1021}
1022
e6ec04b2
CL		 1023static __be32
1024nfsd4_decode_openflag4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
1025{
1026 __be32 status;
1027
1028 if (xdr_stream_decode_u32(argp->xdr, &open->op_create) < 0)
1029 return nfserr_bad_xdr;
1030 switch (open->op_create) {
1031 case NFS4_OPEN_NOCREATE:
1032 break;
1033 case NFS4_OPEN_CREATE:
1034 status = nfsd4_decode_createhow4(argp, open);
1035 if (status)
1036 return status;
1037 break;
1038 default:
1039 return nfserr_bad_xdr;
1040 }
1041
1042 return nfs_ok;
1043}
1044
2c8bd7e0 1045static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664 1046{
04f9e664
BF		 1047 u32 w;
1048
9aa62f51
CL		 1049 if (xdr_stream_decode_u32(argp->xdr, &w) < 0)
1050 return nfserr_bad_xdr;
2c8bd7e0
BH		 1051 *share_access = w & NFS4_SHARE_ACCESS_MASK;
1052 *deleg_want = w & NFS4_SHARE_WANT_MASK;
1053 if (deleg_when)
1054 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
1055
04f9e664
BF		 1056 switch (w & NFS4_SHARE_ACCESS_MASK) {
1057 case NFS4_SHARE_ACCESS_READ:
1058 case NFS4_SHARE_ACCESS_WRITE:
1059 case NFS4_SHARE_ACCESS_BOTH:
1060 break;
1061 default:
1062 return nfserr_bad_xdr;
1063 }
fc0d14fe 1064 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 1065 if (!w)
1066 return nfs_ok;
1067 if (!argp->minorversion)
1068 return nfserr_bad_xdr;
1069 switch (w & NFS4_SHARE_WANT_MASK) {
1070 case NFS4_SHARE_WANT_NO_PREFERENCE:
1071 case NFS4_SHARE_WANT_READ_DELEG:
1072 case NFS4_SHARE_WANT_WRITE_DELEG:
1073 case NFS4_SHARE_WANT_ANY_DELEG:
1074 case NFS4_SHARE_WANT_NO_DELEG:
1075 case NFS4_SHARE_WANT_CANCEL:
1076 break;
1077 default:
1078 return nfserr_bad_xdr;
1079 }
92bac8c5 1080 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 1081 if (!w)
1082 return nfs_ok;
2c8bd7e0
BH		 1083
1084 if (!deleg_when) /* open_downgrade */
1085 return nfserr_inval;
04f9e664
BF		 1086 switch (w) {
1087 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
1088 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 1089 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
1090 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 1091 return nfs_ok;
1092 }
04f9e664
BF		 1093 return nfserr_bad_xdr;
1094}
1095
1096static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
1097{
b07bebd9
CL		 1098 if (xdr_stream_decode_u32(argp->xdr, x) < 0)
1099 return nfserr_bad_xdr;
1100 /* Note: unlike access bits, deny bits may be zero. */
01cd4afa 1101 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664 1102 return nfserr_bad_xdr;
b07bebd9 1103
04f9e664 1104 return nfs_ok;
04f9e664
BF		 1105}
1106
1708e50b
CL		 1107static __be32
1108nfsd4_decode_open_claim4(struct nfsd4_compoundargs *argp,
1109 struct nfsd4_open *open)
1110{
1111 __be32 status;
1112
1113 if (xdr_stream_decode_u32(argp->xdr, &open->op_claim_type) < 0)
1114 return nfserr_bad_xdr;
1115 switch (open->op_claim_type) {
1116 case NFS4_OPEN_CLAIM_NULL:
1117 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1118 status = nfsd4_decode_component4(argp, &open->op_fname,
1119 &open->op_fnamelen);
1120 if (status)
1121 return status;
1122 break;
1123 case NFS4_OPEN_CLAIM_PREVIOUS:
1124 if (xdr_stream_decode_u32(argp->xdr, &open->op_delegate_type) < 0)
1125 return nfserr_bad_xdr;
1126 break;
1127 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1128 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1129 if (status)
1130 return status;
1131 status = nfsd4_decode_component4(argp, &open->op_fname,
1132 &open->op_fnamelen);
1133 if (status)
1134 return status;
1135 break;
1136 case NFS4_OPEN_CLAIM_FH:
1137 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1138 if (argp->minorversion < 1)
1139 return nfserr_bad_xdr;
1140 /* void */
1141 break;
1142 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1143 if (argp->minorversion < 1)
1144 return nfserr_bad_xdr;
1145 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1146 if (status)
1147 return status;
1148 break;
1149 default:
1150 return nfserr_bad_xdr;
1151 }
1152
1153 return nfs_ok;
1154}
1155
b37ad28b 1156static __be32
e78e274e 1157nfsd4_decode_open(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 1158{
e78e274e 1159 struct nfsd4_open *open = &u->open;
61e5e0b3 1160 __be32 status;
2c8bd7e0 1161 u32 dummy;
1da177e4 1162
3fdc5464 1163 memset(open, 0, sizeof(*open));
1da177e4 1164
61e5e0b3
CL		 1165 if (xdr_stream_decode_u32(argp->xdr, &open->op_seqid) < 0)
1166 return nfserr_bad_xdr;
1167 /* deleg_want is ignored */
2c8bd7e0
BH		 1168 status = nfsd4_decode_share_access(argp, &open->op_share_access,
1169 &open->op_deleg_want, &dummy);
04f9e664 1170 if (status)
61e5e0b3 1171 return status;
04f9e664
BF		 1172 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
1173 if (status)
61e5e0b3
CL		 1174 return status;
1175 status = nfsd4_decode_state_owner4(argp, &open->op_clientid,
1176 &open->op_owner);
a084daf5 1177 if (status)
61e5e0b3 1178 return status;
e6ec04b2
CL		 1179 status = nfsd4_decode_openflag4(argp, open);
1180 if (status)
1181 return status;
61e5e0b3 1182 return nfsd4_decode_open_claim4(argp, open);
1da177e4
LT		 1183}
1184
b37ad28b 1185static __be32
e78e274e
KC		 1186nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp,
1187 union nfsd4_op_u *u)
1da177e4 1188{
e78e274e 1189 struct nfsd4_open_confirm *open_conf = &u->open_confirm;
06bee693 1190 __be32 status;
e1a90ebd
AS		 1191
1192 if (argp->minorversion >= 1)
1193 return nfserr_notsupp;
1194
06bee693 1195 status = nfsd4_decode_stateid4(argp, &open_conf->oc_req_stateid);
e31a1b66
BH		 1196 if (status)
1197 return status;
06bee693
CL		 1198 if (xdr_stream_decode_u32(argp->xdr, &open_conf->oc_seqid) < 0)
1199 return nfserr_bad_xdr;
e1a90ebd 1200
3fdc5464
CL		 1201 memset(&open_conf->oc_resp_stateid, 0,
1202 sizeof(open_conf->oc_resp_stateid));
06bee693 1203 return nfs_ok;
1da177e4
LT		 1204}
1205
b37ad28b 1206static __be32
e78e274e
KC		 1207nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp,
1208 union nfsd4_op_u *u)
1da177e4 1209{
e78e274e 1210 struct nfsd4_open_downgrade *open_down = &u->open_downgrade;
dca71651
CL		 1211 __be32 status;
1212
3fdc5464 1213 memset(open_down, 0, sizeof(*open_down));
dca71651 1214 status = nfsd4_decode_stateid4(argp, &open_down->od_stateid);
e31a1b66
BH		 1215 if (status)
1216 return status;
dca71651
CL		 1217 if (xdr_stream_decode_u32(argp->xdr, &open_down->od_seqid) < 0)
1218 return nfserr_bad_xdr;
1219 /* deleg_want is ignored */
2c8bd7e0
BH		 1220 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1221 &open_down->od_deleg_want, NULL);
04f9e664
BF		 1222 if (status)
1223 return status;
dca71651 1224 return nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1da177e4
LT		 1225}
1226
b37ad28b 1227static __be32
e78e274e 1228nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 1229{
e78e274e 1230 struct nfsd4_putfh *putfh = &u->putfh;
a73bed98 1231 __be32 *p;
1da177e4 1232
a73bed98
CL		 1233 if (xdr_stream_decode_u32(argp->xdr, &putfh->pf_fhlen) < 0)
1234 return nfserr_bad_xdr;
1da177e4 1235 if (putfh->pf_fhlen > NFS4_FHSIZE)
a73bed98
CL		 1236 return nfserr_bad_xdr;
1237 p = xdr_inline_decode(argp->xdr, putfh->pf_fhlen);
1238 if (!p)
1239 return nfserr_bad_xdr;
7b723008 1240 putfh->pf_fhval = svcxdr_savemem(argp, p, putfh->pf_fhlen);
a73bed98
CL		 1241 if (!putfh->pf_fhval)
1242 return nfserr_jukebox;
1da177e4 1243
3fdc5464 1244 putfh->no_verify = false;
a73bed98 1245 return nfs_ok;
1da177e4
LT		 1246}
1247
e1a90ebd 1248static __be32
e78e274e 1249nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p)
e1a90ebd
AS		 1250{
1251 if (argp->minorversion == 0)
1252 return nfs_ok;
1253 return nfserr_notsupp;
1254}
1255
b37ad28b 1256static __be32
e78e274e 1257nfsd4_decode_read(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 1258{
e78e274e 1259 struct nfsd4_read *read = &u->read;
3909c3bc 1260 __be32 status;
1da177e4 1261
3fdc5464 1262 memset(read, 0, sizeof(*read));
3909c3bc 1263 status = nfsd4_decode_stateid4(argp, &read->rd_stateid);
e31a1b66
BH		 1264 if (status)
1265 return status;
3909c3bc
CL		 1266 if (xdr_stream_decode_u64(argp->xdr, &read->rd_offset) < 0)
1267 return nfserr_bad_xdr;
1268 if (xdr_stream_decode_u32(argp->xdr, &read->rd_length) < 0)
1269 return nfserr_bad_xdr;
1da177e4 1270
3909c3bc 1271 return nfs_ok;
1da177e4
LT		 1272}
1273
b37ad28b 1274static __be32
e78e274e 1275nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 1276{
e78e274e 1277 struct nfsd4_readdir *readdir = &u->readdir;
0dfaf2a3 1278 __be32 status;
1da177e4 1279
3fdc5464 1280 memset(readdir, 0, sizeof(*readdir));
0dfaf2a3
CL		 1281 if (xdr_stream_decode_u64(argp->xdr, &readdir->rd_cookie) < 0)
1282 return nfserr_bad_xdr;
1283 status = nfsd4_decode_verifier4(argp, &readdir->rd_verf);
1284 if (status)
1285 return status;
1286 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_dircount) < 0)
1287 return nfserr_bad_xdr;
1288 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_maxcount) < 0)
1289 return nfserr_bad_xdr;
1290 if (xdr_stream_decode_uint32_array(argp->xdr, readdir->rd_bmval,
1291 ARRAY_SIZE(readdir->rd_bmval)) < 0)
1292 return nfserr_bad_xdr;
1da177e4 1293
0dfaf2a3 1294 return nfs_ok;
1da177e4
LT		 1295}
1296
b37ad28b 1297static __be32
e78e274e 1298nfsd4_decode_remove(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 1299{
e78e274e 1300 struct nfsd4_remove *remove = &u->remove;
3fdc5464 1301 memset(&remove->rm_cinfo, 0, sizeof(remove->rm_cinfo));
b7f5fbf2 1302 return nfsd4_decode_component4(argp, &remove->rm_name, &remove->rm_namelen);
1da177e4
LT		 1303}
1304
b37ad28b 1305static __be32
e78e274e 1306nfsd4_decode_rename(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 1307{
e78e274e 1308 struct nfsd4_rename *rename = &u->rename;
ba881a0a 1309 __be32 status;
1da177e4 1310
3fdc5464 1311 memset(rename, 0, sizeof(*rename));
ba881a0a
CL		 1312 status = nfsd4_decode_component4(argp, &rename->rn_sname, &rename->rn_snamelen);
1313 if (status)
1da177e4 1314 return status;
ba881a0a 1315 return nfsd4_decode_component4(argp, &rename->rn_tname, &rename->rn_tnamelen);
1da177e4
LT		 1316}
1317
b37ad28b 1318static __be32
e78e274e 1319nfsd4_decode_renew(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 1320{
e78e274e 1321 clientid_t *clientid = &u->renew;
d12f9045 1322 return nfsd4_decode_clientid4(argp, clientid);
1da177e4
LT		 1323}
1324
dcb488a3
AA		 1325static __be32
1326nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
e78e274e 1327 union nfsd4_op_u *u)
dcb488a3 1328{
e78e274e 1329 struct nfsd4_secinfo *secinfo = &u->secinfo;
3fdc5464 1330 secinfo->si_exp = NULL;
d0abdae5 1331 return nfsd4_decode_component4(argp, &secinfo->si_name, &secinfo->si_namelen);
dcb488a3
AA		 1332}
1333
b37ad28b 1334static __be32
e78e274e 1335nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 1336{
e78e274e 1337 struct nfsd4_setattr *setattr = &u->setattr;
e31a1b66 1338 __be32 status;
1da177e4 1339
3fdc5464 1340 memset(setattr, 0, sizeof(*setattr));
44592fe9 1341 status = nfsd4_decode_stateid4(argp, &setattr->sa_stateid);
e31a1b66
BH		 1342 if (status)
1343 return status;
d1c263a0
CL		 1344 return nfsd4_decode_fattr4(argp, setattr->sa_bmval,
1345 ARRAY_SIZE(setattr->sa_bmval),
1346 &setattr->sa_iattr, &setattr->sa_acl,
1347 &setattr->sa_label, NULL);
1da177e4
LT		 1348}
1349
b37ad28b 1350static __be32
e78e274e 1351nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 1352{
e78e274e 1353 struct nfsd4_setclientid *setclientid = &u->setclientid;
92fa6c08 1354 __be32 *p, status;
1da177e4 1355
3fdc5464
CL		 1356 memset(setclientid, 0, sizeof(*setclientid));
1357
e1a90ebd
AS		 1358 if (argp->minorversion >= 1)
1359 return nfserr_notsupp;
1360
92fa6c08
CL		 1361 status = nfsd4_decode_verifier4(argp, &setclientid->se_verf);
1362 if (status)
1363 return status;
a084daf5
BF		 1364 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1365 if (status)
92fa6c08
CL		 1366 return status;
1367 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_prog) < 0)
a084daf5 1368 return nfserr_bad_xdr;
92fa6c08
CL		 1369 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_netid_len) < 0)
1370 return nfserr_bad_xdr;
1371 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_netid_len);
1372 if (!p)
1373 return nfserr_bad_xdr;
7b723008 1374 setclientid->se_callback_netid_val = svcxdr_savemem(argp, p,
92fa6c08
CL		 1375 setclientid->se_callback_netid_len);
1376 if (!setclientid->se_callback_netid_val)
1377 return nfserr_jukebox;
1da177e4 1378
92fa6c08
CL		 1379 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_addr_len) < 0)
1380 return nfserr_bad_xdr;
1381 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_addr_len);
1382 if (!p)
1383 return nfserr_bad_xdr;
7b723008 1384 setclientid->se_callback_addr_val = svcxdr_savemem(argp, p,
92fa6c08
CL		 1385 setclientid->se_callback_addr_len);
1386 if (!setclientid->se_callback_addr_val)
1387 return nfserr_jukebox;
92fa6c08
CL		 1388 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_ident) < 0)
1389 return nfserr_bad_xdr;
1da177e4 1390
92fa6c08 1391 return nfs_ok;
1da177e4
LT		 1392}
1393
b37ad28b 1394static __be32
e78e274e
KC		 1395nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp,
1396 union nfsd4_op_u *u)
1da177e4 1397{
e78e274e 1398 struct nfsd4_setclientid_confirm *scd_c = &u->setclientid_confirm;
d1ca5514 1399 __be32 status;
1da177e4 1400
e1a90ebd
AS		 1401 if (argp->minorversion >= 1)
1402 return nfserr_notsupp;
1403
d1ca5514
CL		 1404 status = nfsd4_decode_clientid4(argp, &scd_c->sc_clientid);
1405 if (status)
1406 return status;
1407 return nfsd4_decode_verifier4(argp, &scd_c->sc_confirm);
1da177e4
LT		 1408}
1409
1410/* Also used for NVERIFY */
b37ad28b 1411static __be32
e78e274e 1412nfsd4_decode_verify(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 1413{
e78e274e 1414 struct nfsd4_verify *verify = &u->verify;
67cd453e 1415 __be32 *p, status;
1da177e4 1416
3fdc5464
CL		 1417 memset(verify, 0, sizeof(*verify));
1418
67cd453e
CL		 1419 status = nfsd4_decode_bitmap4(argp, verify->ve_bmval,
1420 ARRAY_SIZE(verify->ve_bmval));
1421 if (status)
1422 return status;
1da177e4
LT		 1423
1424 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1425 * nfsd4_proc_verify */
1426
67cd453e
CL		 1427 if (xdr_stream_decode_u32(argp->xdr, &verify->ve_attrlen) < 0)
1428 return nfserr_bad_xdr;
1429 p = xdr_inline_decode(argp->xdr, verify->ve_attrlen);
1430 if (!p)
1431 return nfserr_bad_xdr;
7b723008 1432 verify->ve_attrval = svcxdr_savemem(argp, p, verify->ve_attrlen);
67cd453e
CL		 1433 if (!verify->ve_attrval)
1434 return nfserr_jukebox;
1da177e4 1435
67cd453e 1436 return nfs_ok;
1da177e4
LT		 1437}
1438
b37ad28b 1439static __be32
e78e274e 1440nfsd4_decode_write(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1da177e4 1441{
e78e274e 1442 struct nfsd4_write *write = &u->write;
244e2bef 1443 __be32 status;
1da177e4 1444
244e2bef 1445 status = nfsd4_decode_stateid4(argp, &write->wr_stateid);
e31a1b66
BH		 1446 if (status)
1447 return status;
244e2bef
CL		 1448 if (xdr_stream_decode_u64(argp->xdr, &write->wr_offset) < 0)
1449 return nfserr_bad_xdr;
1450 if (xdr_stream_decode_u32(argp->xdr, &write->wr_stable_how) < 0)
1451 return nfserr_bad_xdr;
54bbb7d2 1452 if (write->wr_stable_how > NFS_FILE_SYNC)
244e2bef
CL		 1453 return nfserr_bad_xdr;
1454 if (xdr_stream_decode_u32(argp->xdr, &write->wr_buflen) < 0)
1455 return nfserr_bad_xdr;
c1346a12 1456 if (!xdr_stream_subsegment(argp->xdr, &write->wr_payload, write->wr_buflen))
244e2bef 1457 return nfserr_bad_xdr;
1da177e4 1458
3fdc5464
CL		 1459 write->wr_bytes_written = 0;
1460 write->wr_how_written = 0;
1461 memset(&write->wr_verifier, 0, sizeof(write->wr_verifier));
244e2bef 1462 return nfs_ok;
1da177e4
LT		 1463}
1464
b37ad28b 1465static __be32
e78e274e
KC		 1466nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp,
1467 union nfsd4_op_u *u)
1da177e4 1468{
e78e274e 1469 struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner;
a4a80c15 1470 __be32 status;
1da177e4 1471
e1a90ebd
AS		 1472 if (argp->minorversion >= 1)
1473 return nfserr_notsupp;
1474
a4a80c15
CL		 1475 status = nfsd4_decode_state_owner4(argp, &rlockowner->rl_clientid,
1476 &rlockowner->rl_owner);
1477 if (status)
1478 return status;
1da177e4 1479
60adfc50
AA		 1480 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1481 return nfserr_inval;
a4a80c15
CL		 1482
1483 return nfs_ok;
1da177e4
LT		 1484}
1485
e78e274e
KC		 1486static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp,
1487 union nfsd4_op_u *u)
0f81d960 1488{
e78e274e 1489 struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl;
3fdc5464 1490 memset(bc, 0, sizeof(*bc));
0f81d960
CL		 1491 if (xdr_stream_decode_u32(argp->xdr, &bc->bc_cb_program) < 0)
1492 return nfserr_bad_xdr;
1493 return nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
1494}
1495
e78e274e
KC		 1496static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp,
1497 union nfsd4_op_u *u)
571e0451 1498{
e78e274e 1499 struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session;
571e0451
CL		 1500 u32 use_conn_in_rdma_mode;
1501 __be32 status;
1502
3fdc5464 1503 memset(bcts, 0, sizeof(*bcts));
571e0451
CL		 1504 status = nfsd4_decode_sessionid4(argp, &bcts->sessionid);
1505 if (status)
1506 return status;
1507 if (xdr_stream_decode_u32(argp->xdr, &bcts->dir) < 0)
1508 return nfserr_bad_xdr;
1509 if (xdr_stream_decode_u32(argp->xdr, &use_conn_in_rdma_mode) < 0)
1510 return nfserr_bad_xdr;
1511
1512 return nfs_ok;
1513}
1514
2548aa78
CL		 1515static __be32
1516nfsd4_decode_state_protect_ops(struct nfsd4_compoundargs *argp,
1517 struct nfsd4_exchange_id *exid)
1518{
1519 __be32 status;
1520
1521 status = nfsd4_decode_bitmap4(argp, exid->spo_must_enforce,
1522 ARRAY_SIZE(exid->spo_must_enforce));
1523 if (status)
1524 return nfserr_bad_xdr;
1525 status = nfsd4_decode_bitmap4(argp, exid->spo_must_allow,
1526 ARRAY_SIZE(exid->spo_must_allow));
1527 if (status)
1528 return nfserr_bad_xdr;
1529
1530 return nfs_ok;
1531}
1532
547bfeb4
CL		 1533/*
1534 * This implementation currently does not support SP4_SSV.
1535 * This decoder simply skips over these arguments.
1536 */
1537static noinline __be32
1538nfsd4_decode_ssv_sp_parms(struct nfsd4_compoundargs *argp,
1539 struct nfsd4_exchange_id *exid)
1540{
1541 u32 count, window, num_gss_handles;
1542 __be32 status;
1543
1544 /* ssp_ops */
1545 status = nfsd4_decode_state_protect_ops(argp, exid);
1546 if (status)
1547 return status;
1548
1549 /* ssp_hash_algs<> */
1550 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1551 return nfserr_bad_xdr;
1552 while (count--) {
1553 status = nfsd4_decode_ignored_string(argp, 0);
1554 if (status)
1555 return status;
1556 }
1557
1558 /* ssp_encr_algs<> */
1559 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1560 return nfserr_bad_xdr;
1561 while (count--) {
1562 status = nfsd4_decode_ignored_string(argp, 0);
1563 if (status)
1564 return status;
1565 }
1566
1567 if (xdr_stream_decode_u32(argp->xdr, &window) < 0)
1568 return nfserr_bad_xdr;
1569 if (xdr_stream_decode_u32(argp->xdr, &num_gss_handles) < 0)
1570 return nfserr_bad_xdr;
1571
1572 return nfs_ok;
1573}
1574
2db134eb 1575static __be32
523ec6ed
CL		 1576nfsd4_decode_state_protect4_a(struct nfsd4_compoundargs *argp,
1577 struct nfsd4_exchange_id *exid)
2db134eb 1578{
523ec6ed 1579 __be32 status;
0733d213 1580
523ec6ed 1581 if (xdr_stream_decode_u32(argp->xdr, &exid->spa_how) < 0)
a084daf5 1582 return nfserr_bad_xdr;
0733d213
AA		 1583 switch (exid->spa_how) {
1584 case SP4_NONE:
1585 break;
1586 case SP4_MACH_CRED:
2548aa78 1587 status = nfsd4_decode_state_protect_ops(argp, exid);
ed941643 1588 if (status)
2548aa78 1589 return status;
0733d213
AA		 1590 break;
1591 case SP4_SSV:
547bfeb4 1592 status = nfsd4_decode_ssv_sp_parms(argp, exid);
2548aa78
CL		 1593 if (status)
1594 return status;
0733d213
AA		 1595 break;
1596 default:
523ec6ed 1597 return nfserr_bad_xdr;
0733d213
AA		 1598 }
1599
523ec6ed
CL		 1600 return nfs_ok;
1601}
1602
10ff8422
CL		 1603static __be32
1604nfsd4_decode_nfs_impl_id4(struct nfsd4_compoundargs *argp,
1605 struct nfsd4_exchange_id *exid)
1606{
1607 __be32 status;
1608 u32 count;
1609
1610 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1611 return nfserr_bad_xdr;
1612 switch (count) {
1613 case 0:
1614 break;
1615 case 1:
1616 /* Note that RFC 8881 places no length limit on
1617 * nii_domain, but this implementation permits no
1618 * more than NFS4_OPAQUE_LIMIT bytes */
1619 status = nfsd4_decode_opaque(argp, &exid->nii_domain);
1620 if (status)
1621 return status;
1622 /* Note that RFC 8881 places no length limit on
1623 * nii_name, but this implementation permits no
1624 * more than NFS4_OPAQUE_LIMIT bytes */
1625 status = nfsd4_decode_opaque(argp, &exid->nii_name);
1626 if (status)
1627 return status;
1628 status = nfsd4_decode_nfstime4(argp, &exid->nii_time);
1629 if (status)
1630 return status;
1631 break;
1632 default:
1633 return nfserr_bad_xdr;
1634 }
1635
1636 return nfs_ok;
1637}
1638
523ec6ed
CL		 1639static __be32
1640nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
e78e274e 1641 union nfsd4_op_u *u)
523ec6ed 1642{
e78e274e 1643 struct nfsd4_exchange_id *exid = &u->exchange_id;
10ff8422 1644 __be32 status;
523ec6ed 1645
3fdc5464 1646 memset(exid, 0, sizeof(*exid));
523ec6ed
CL		 1647 status = nfsd4_decode_verifier4(argp, &exid->verifier);
1648 if (status)
1649 return status;
1650 status = nfsd4_decode_opaque(argp, &exid->clname);
1651 if (status)
1652 return status;
1653 if (xdr_stream_decode_u32(argp->xdr, &exid->flags) < 0)
1654 return nfserr_bad_xdr;
1655 status = nfsd4_decode_state_protect4_a(argp, exid);
1656 if (status)
1657 return status;
10ff8422 1658 return nfsd4_decode_nfs_impl_id4(argp, exid);
2db134eb
AA		 1659}
1660
3a3f1fba
CL		 1661static __be32
1662nfsd4_decode_channel_attrs4(struct nfsd4_compoundargs *argp,
1663 struct nfsd4_channel_attrs *ca)
1664{
1665 __be32 *p;
1666
1667 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 7);
1668 if (!p)
1669 return nfserr_bad_xdr;
1670
1671 /* headerpadsz is ignored */
1672 p++;
1673 ca->maxreq_sz = be32_to_cpup(p++);
1674 ca->maxresp_sz = be32_to_cpup(p++);
1675 ca->maxresp_cached = be32_to_cpup(p++);
1676 ca->maxops = be32_to_cpup(p++);
1677 ca->maxreqs = be32_to_cpup(p++);
1678 ca->nr_rdma_attrs = be32_to_cpup(p);
1679 switch (ca->nr_rdma_attrs) {
1680 case 0:
1681 break;
1682 case 1:
1683 if (xdr_stream_decode_u32(argp->xdr, &ca->rdma_attrs) < 0)
1684 return nfserr_bad_xdr;
1685 break;
1686 default:
1687 return nfserr_bad_xdr;
1688 }
1689
1690 return nfs_ok;
1691}
1692
2db134eb
AA		 1693static __be32
1694nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
e78e274e 1695 union nfsd4_op_u *u)
2db134eb 1696{
e78e274e 1697 struct nfsd4_create_session *sess = &u->create_session;
81243e3f 1698 __be32 status;
ec6b5d7b 1699
3fdc5464 1700 memset(sess, 0, sizeof(*sess));
81243e3f
CL		 1701 status = nfsd4_decode_clientid4(argp, &sess->clientid);
1702 if (status)
1703 return status;
1704 if (xdr_stream_decode_u32(argp->xdr, &sess->seqid) < 0)
1705 return nfserr_bad_xdr;
1706 if (xdr_stream_decode_u32(argp->xdr, &sess->flags) < 0)
1707 return nfserr_bad_xdr;
3a3f1fba
CL		 1708 status = nfsd4_decode_channel_attrs4(argp, &sess->fore_channel);
1709 if (status)
1710 return status;
1711 status = nfsd4_decode_channel_attrs4(argp, &sess->back_channel);
81243e3f
CL		 1712 if (status)
1713 return status;
1714 if (xdr_stream_decode_u32(argp->xdr, &sess->callback_prog) < 0)
1715 return nfserr_bad_xdr;
3fdc5464 1716 return nfsd4_decode_cb_sec(argp, &sess->cb_sec);
2db134eb
AA		 1717}
1718
1719static __be32
1720nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
e78e274e 1721 union nfsd4_op_u *u)
2db134eb 1722{
e78e274e 1723 struct nfsd4_destroy_session *destroy_session = &u->destroy_session;
94e254af 1724 return nfsd4_decode_sessionid4(argp, &destroy_session->sessionid);
2db134eb
AA		 1725}
1726
e1ca12df
BS		 1727static __be32
1728nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
e78e274e 1729 union nfsd4_op_u *u)
e1ca12df 1730{
e78e274e 1731 struct nfsd4_free_stateid *free_stateid = &u->free_stateid;
aec387d5 1732 return nfsd4_decode_stateid4(argp, &free_stateid->fr_stateid);
e1ca12df
BS		 1733}
1734
9cf514cc
CH		 1735#ifdef CONFIG_NFSD_PNFS
1736static __be32
1737nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
e78e274e 1738 union nfsd4_op_u *u)
9cf514cc 1739{
e78e274e 1740 struct nfsd4_getdeviceinfo *gdev = &u->getdeviceinfo;
04495971
CL		 1741 __be32 status;
1742
3fdc5464 1743 memset(gdev, 0, sizeof(*gdev));
04495971
CL		 1744 status = nfsd4_decode_deviceid4(argp, &gdev->gd_devid);
1745 if (status)
1746 return status;
1747 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_layout_type) < 0)
1748 return nfserr_bad_xdr;
1749 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_maxcount) < 0)
1750 return nfserr_bad_xdr;
1751 if (xdr_stream_decode_uint32_array(argp->xdr,
1752 &gdev->gd_notify_types, 1) < 0)
1753 return nfserr_bad_xdr;
1754
1755 return nfs_ok;
9cf514cc
CH		 1756}
1757
5185980d
CL		 1758static __be32
1759nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
e78e274e 1760 union nfsd4_op_u *u)
5185980d 1761{
e78e274e 1762 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
5185980d
CL		 1763 __be32 *p, status;
1764
3fdc5464 1765 memset(lcp, 0, sizeof(*lcp));
5185980d
CL		 1766 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.offset) < 0)
1767 return nfserr_bad_xdr;
1768 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.length) < 0)
1769 return nfserr_bad_xdr;
1770 if (xdr_stream_decode_bool(argp->xdr, &lcp->lc_reclaim) < 0)
1771 return nfserr_bad_xdr;
1772 status = nfsd4_decode_stateid4(argp, &lcp->lc_sid);
1773 if (status)
1774 return status;
1775 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_newoffset) < 0)
1776 return nfserr_bad_xdr;
1777 if (lcp->lc_newoffset) {
1778 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_last_wr) < 0)
1779 return nfserr_bad_xdr;
1780 } else
1781 lcp->lc_last_wr = 0;
1782 p = xdr_inline_decode(argp->xdr, XDR_UNIT);
1783 if (!p)
1784 return nfserr_bad_xdr;
1785 if (xdr_item_is_present(p)) {
1786 status = nfsd4_decode_nfstime4(argp, &lcp->lc_mtime);
1787 if (status)
1788 return status;
1789 } else {
1790 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1791 }
1792 return nfsd4_decode_layoutupdate4(argp, lcp);
1793}
1794
9cf514cc
CH		 1795static __be32
1796nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
e78e274e 1797 union nfsd4_op_u *u)
9cf514cc 1798{
e78e274e 1799 struct nfsd4_layoutget *lgp = &u->layoutget;
c8e88e3a 1800 __be32 status;
db59c0ef 1801
3fdc5464 1802 memset(lgp, 0, sizeof(*lgp));
c8e88e3a
CL		 1803 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_signal) < 0)
1804 return nfserr_bad_xdr;
1805 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_layout_type) < 0)
1806 return nfserr_bad_xdr;
1807 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_seg.iomode) < 0)
1808 return nfserr_bad_xdr;
1809 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.offset) < 0)
1810 return nfserr_bad_xdr;
1811 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.length) < 0)
1812 return nfserr_bad_xdr;
1813 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_minlength) < 0)
1814 return nfserr_bad_xdr;
1815 status = nfsd4_decode_stateid4(argp, &lgp->lg_sid);
db59c0ef
KM		 1816 if (status)
1817 return status;
c8e88e3a
CL		 1818 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_maxcount) < 0)
1819 return nfserr_bad_xdr;
db59c0ef 1820
c8e88e3a 1821 return nfs_ok;
9cf514cc
CH		 1822}
1823
9cf514cc
CH		 1824static __be32
1825nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
e78e274e 1826 union nfsd4_op_u *u)
9cf514cc 1827{
e78e274e 1828 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
3fdc5464 1829 memset(lrp, 0, sizeof(*lrp));
645fcad3
CL		 1830 if (xdr_stream_decode_bool(argp->xdr, &lrp->lr_reclaim) < 0)
1831 return nfserr_bad_xdr;
1832 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_layout_type) < 0)
1833 return nfserr_bad_xdr;
1834 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_seg.iomode) < 0)
1835 return nfserr_bad_xdr;
1836 return nfsd4_decode_layoutreturn4(argp, lrp);
9cf514cc
CH		 1837}
1838#endif /* CONFIG_NFSD_PNFS */
1839
53d70873 1840static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
e78e274e 1841 union nfsd4_op_u *u)
53d70873 1842{
e78e274e 1843 struct nfsd4_secinfo_no_name *sin = &u->secinfo_no_name;
53d70873
CL		 1844 if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0)
1845 return nfserr_bad_xdr;
3fdc5464
CL		 1846
1847 sin->sin_exp = NULL;
53d70873
CL		 1848 return nfs_ok;
1849}
1850
cf907b11
CL		 1851static __be32
1852nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
e78e274e 1853 union nfsd4_op_u *u)
cf907b11 1854{
e78e274e 1855 struct nfsd4_sequence *seq = &u->sequence;
cf907b11
CL		 1856 __be32 *p, status;
1857
1858 status = nfsd4_decode_sessionid4(argp, &seq->sessionid);
1859 if (status)
1860 return status;
1861 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 4);
1862 if (!p)
1863 return nfserr_bad_xdr;
1864 seq->seqid = be32_to_cpup(p++);
1865 seq->slotid = be32_to_cpup(p++);
1866 seq->maxslots = be32_to_cpup(p++);
1867 seq->cachethis = be32_to_cpup(p);
1868
3fdc5464 1869 seq->status_flags = 0;
cf907b11
CL		 1870 return nfs_ok;
1871}
1872
b7a0c8f6 1873static __be32
e78e274e
KC		 1874nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp,
1875 union nfsd4_op_u *u)
b7a0c8f6 1876{
e78e274e 1877 struct nfsd4_test_stateid *test_stateid = &u->test_stateid;
b7a0c8f6
CL		 1878 struct nfsd4_test_stateid_id *stateid;
1879 __be32 status;
1880 u32 i;
1881
3fdc5464 1882 memset(test_stateid, 0, sizeof(*test_stateid));
b7a0c8f6
CL		 1883 if (xdr_stream_decode_u32(argp->xdr, &test_stateid->ts_num_ids) < 0)
1884 return nfserr_bad_xdr;
1885
1886 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1887 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1888 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1889 if (!stateid)
bb4d8427 1890 return nfserr_jukebox;
b7a0c8f6
CL		 1891 INIT_LIST_HEAD(&stateid->ts_id_list);
1892 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1893 status = nfsd4_decode_stateid4(argp, &stateid->ts_id_stateid);
1894 if (status)
1895 return status;
1896 }
1897
1898 return nfs_ok;
1899}
1900
c95f2ec3 1901static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp,
e78e274e 1902 union nfsd4_op_u *u)
c95f2ec3 1903{
e78e274e 1904 struct nfsd4_destroy_clientid *dc = &u->destroy_clientid;
c95f2ec3
CL		 1905 return nfsd4_decode_clientid4(argp, &dc->clientid);
1906}
1907
0d646784 1908static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp,
e78e274e 1909 union nfsd4_op_u *u)
0d646784 1910{
e78e274e 1911 struct nfsd4_reclaim_complete *rc = &u->reclaim_complete;
0d646784
CL		 1912 if (xdr_stream_decode_bool(argp->xdr, &rc->rca_one_fs) < 0)
1913 return nfserr_bad_xdr;
1914 return nfs_ok;
1915}
1916
95d871f0
AS		 1917static __be32
1918nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
e78e274e 1919 union nfsd4_op_u *u)
95d871f0 1920{
e78e274e 1921 struct nfsd4_fallocate *fallocate = &u->allocate;
6aef27aa 1922 __be32 status;
95d871f0 1923
6aef27aa 1924 status = nfsd4_decode_stateid4(argp, &fallocate->falloc_stateid);
95d871f0
AS		 1925 if (status)
1926 return status;
6aef27aa
CL		 1927 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_offset) < 0)
1928 return nfserr_bad_xdr;
1929 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_length) < 0)
1930 return nfserr_bad_xdr;
95d871f0 1931
6aef27aa 1932 return nfs_ok;
95d871f0
AS		 1933}
1934
84e1b21d
OK		 1935static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
1936 struct nl4_server *ns)
1937{
84e1b21d 1938 struct nfs42_netaddr *naddr;
f49e4b4d 1939 __be32 *p;
84e1b21d 1940
f49e4b4d
CL		 1941 if (xdr_stream_decode_u32(argp->xdr, &ns->nl4_type) < 0)
1942 return nfserr_bad_xdr;
84e1b21d
OK		 1943
1944 /* currently support for 1 inter-server source server */
1945 switch (ns->nl4_type) {
1946 case NL4_NETADDR:
1947 naddr = &ns->u.nl4_addr;
1948
f49e4b4d
CL		 1949 if (xdr_stream_decode_u32(argp->xdr, &naddr->netid_len) < 0)
1950 return nfserr_bad_xdr;
84e1b21d 1951 if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
f49e4b4d 1952 return nfserr_bad_xdr;
84e1b21d 1953
f49e4b4d
CL		 1954 p = xdr_inline_decode(argp->xdr, naddr->netid_len);
1955 if (!p)
1956 return nfserr_bad_xdr;
1957 memcpy(naddr->netid, p, naddr->netid_len);
84e1b21d 1958
f49e4b4d
CL		 1959 if (xdr_stream_decode_u32(argp->xdr, &naddr->addr_len) < 0)
1960 return nfserr_bad_xdr;
84e1b21d 1961 if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
f49e4b4d 1962 return nfserr_bad_xdr;
84e1b21d 1963
f49e4b4d
CL		 1964 p = xdr_inline_decode(argp->xdr, naddr->addr_len);
1965 if (!p)
1966 return nfserr_bad_xdr;
1967 memcpy(naddr->addr, p, naddr->addr_len);
84e1b21d
OK		 1968 break;
1969 default:
f49e4b4d 1970 return nfserr_bad_xdr;
84e1b21d 1971 }
f49e4b4d
CL		 1972
1973 return nfs_ok;
84e1b21d
OK		 1974}
1975
29ae7f9d 1976static __be32
e78e274e 1977nfsd4_decode_copy(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
29ae7f9d 1978{
e78e274e 1979 struct nfsd4_copy *copy = &u->copy;
1913cdf5 1980 u32 consecutive, i, count, sync;
84e1b21d 1981 struct nl4_server *ns_dummy;
e8febea7 1982 __be32 status;
29ae7f9d 1983
3fdc5464 1984 memset(copy, 0, sizeof(*copy));
e8febea7 1985 status = nfsd4_decode_stateid4(argp, &copy->cp_src_stateid);
29ae7f9d
AS		 1986 if (status)
1987 return status;
e8febea7 1988 status = nfsd4_decode_stateid4(argp, &copy->cp_dst_stateid);
29ae7f9d
AS		 1989 if (status)
1990 return status;
e8febea7
CL		 1991 if (xdr_stream_decode_u64(argp->xdr, &copy->cp_src_pos) < 0)
1992 return nfserr_bad_xdr;
1993 if (xdr_stream_decode_u64(argp->xdr, &copy->cp_dst_pos) < 0)
1994 return nfserr_bad_xdr;
1995 if (xdr_stream_decode_u64(argp->xdr, &copy->cp_count) < 0)
1996 return nfserr_bad_xdr;
1997 /* ca_consecutive: we always do consecutive copies */
1998 if (xdr_stream_decode_u32(argp->xdr, &consecutive) < 0)
1999 return nfserr_bad_xdr;
1913cdf5 2000 if (xdr_stream_decode_bool(argp->xdr, &sync) < 0)
e8febea7 2001 return nfserr_bad_xdr;
1913cdf5 2002 nfsd4_copy_set_sync(copy, sync);
29ae7f9d 2003
e8febea7
CL		 2004 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
2005 return nfserr_bad_xdr;
87689df6
CL		 2006 copy->cp_src = svcxdr_tmpalloc(argp, sizeof(*copy->cp_src));
2007 if (copy->cp_src == NULL)
2008 return nfserr_jukebox;
84e1b21d 2009 if (count == 0) { /* intra-server copy */
1913cdf5 2010 __set_bit(NFSD4_COPY_F_INTRA, &copy->cp_flags);
e8febea7 2011 return nfs_ok;
84e1b21d
OK		 2012 }
2013
e8febea7 2014 /* decode all the supplied server addresses but use only the first */
87689df6 2015 status = nfsd4_decode_nl4_server(argp, copy->cp_src);
84e1b21d
OK		 2016 if (status)
2017 return status;
2018
2019 ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
2020 if (ns_dummy == NULL)
bb4d8427 2021 return nfserr_jukebox;
84e1b21d
OK		 2022 for (i = 0; i < count - 1; i++) {
2023 status = nfsd4_decode_nl4_server(argp, ns_dummy);
2024 if (status) {
2025 kfree(ns_dummy);
2026 return status;
2027 }
2028 }
2029 kfree(ns_dummy);
29ae7f9d 2030
e8febea7 2031 return nfs_ok;
29ae7f9d
AS		 2032}
2033
51911868
OK		 2034static __be32
2035nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
e78e274e 2036 union nfsd4_op_u *u)
51911868 2037{
e78e274e 2038 struct nfsd4_copy_notify *cn = &u->copy_notify;
5aff7d08 2039 __be32 status;
51911868 2040
3fdc5464 2041 memset(cn, 0, sizeof(*cn));
09426ef2
CL		 2042 cn->cpn_src = svcxdr_tmpalloc(argp, sizeof(*cn->cpn_src));
2043 if (cn->cpn_src == NULL)
2044 return nfserr_jukebox;
2045 cn->cpn_dst = svcxdr_tmpalloc(argp, sizeof(*cn->cpn_dst));
2046 if (cn->cpn_dst == NULL)
2047 return nfserr_jukebox;
2048
f9a953fb 2049 status = nfsd4_decode_stateid4(argp, &cn->cpn_src_stateid);
51911868
OK		 2050 if (status)
2051 return status;
09426ef2 2052 return nfsd4_decode_nl4_server(argp, cn->cpn_dst);
51911868
OK		 2053}
2054
f9a953fb
CL		 2055static __be32
2056nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
e78e274e 2057 union nfsd4_op_u *u)
f9a953fb 2058{
e78e274e 2059 struct nfsd4_offload_status *os = &u->offload_status;
3fdc5464
CL		 2060 os->count = 0;
2061 os->status = 0;
2846bb05 2062 return nfsd4_decode_stateid4(argp, &os->stateid);
f9a953fb
CL		 2063}
2064
24bab491 2065static __be32
e78e274e 2066nfsd4_decode_seek(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
24bab491 2067{
e78e274e 2068 struct nfsd4_seek *seek = &u->seek;
9d32b412 2069 __be32 status;
24bab491 2070
9d32b412 2071 status = nfsd4_decode_stateid4(argp, &seek->seek_stateid);
24bab491
AS		 2072 if (status)
2073 return status;
9d32b412
CL		 2074 if (xdr_stream_decode_u64(argp->xdr, &seek->seek_offset) < 0)
2075 return nfserr_bad_xdr;
2076 if (xdr_stream_decode_u32(argp->xdr, &seek->seek_whence) < 0)
2077 return nfserr_bad_xdr;
24bab491 2078
3fdc5464
CL		 2079 seek->seek_eof = 0;
2080 seek->seek_pos = 0;
9d32b412 2081 return nfs_ok;
24bab491
AS		 2082}
2083
3dfd0b0e 2084static __be32
e78e274e 2085nfsd4_decode_clone(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
3dfd0b0e 2086{
e78e274e 2087 struct nfsd4_clone *clone = &u->clone;
3dfd0b0e
CL		 2088 __be32 status;
2089
2090 status = nfsd4_decode_stateid4(argp, &clone->cl_src_stateid);
2091 if (status)
2092 return status;
2093 status = nfsd4_decode_stateid4(argp, &clone->cl_dst_stateid);
2094 if (status)
2095 return status;
2096 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_src_pos) < 0)
2097 return nfserr_bad_xdr;
2098 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_dst_pos) < 0)
2099 return nfserr_bad_xdr;
2100 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_count) < 0)
2101 return nfserr_bad_xdr;
2102
2103 return nfs_ok;
2104}
2105
23e50fe3
FL		 2106/*
2107 * XDR data that is more than PAGE_SIZE in size is normally part of a
2108 * read or write. However, the size of extended attributes is limited
2109 * by the maximum request size, and then further limited by the underlying
2110 * filesystem limits. This can exceed PAGE_SIZE (currently, XATTR_SIZE_MAX
2111 * is 64k). Since there is no kvec- or page-based interface to xattrs,
2112 * and we're not dealing with contiguous pages, we need to do some copying.
2113 */
2114
2115/*
c1346a12 2116 * Decode data into buffer.
23e50fe3
FL		 2117 */
2118static __be32
c1346a12
CL		 2119nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct xdr_buf *xdr,
2120 char **bufp, u32 buflen)
23e50fe3 2121{
c1346a12
CL		 2122 struct page **pages = xdr->pages;
2123 struct kvec *head = xdr->head;
23e50fe3
FL		 2124 char *tmp, *dp;
2125 u32 len;
2126
2127 if (buflen <= head->iov_len) {
2128 /*
2129 * We're in luck, the head has enough space. Just return
2130 * the head, no need for copying.
2131 */
2132 *bufp = head->iov_base;
2133 return 0;
2134 }
2135
2136 tmp = svcxdr_tmpalloc(argp, buflen);
2137 if (tmp == NULL)
2138 return nfserr_jukebox;
2139
2140 dp = tmp;
2141 memcpy(dp, head->iov_base, head->iov_len);
2142 buflen -= head->iov_len;
2143 dp += head->iov_len;
2144
2145 while (buflen > 0) {
2146 len = min_t(u32, buflen, PAGE_SIZE);
2147 memcpy(dp, page_address(*pages), len);
2148
2149 buflen -= len;
2150 dp += len;
2151 pages++;
2152 }
2153
2154 *bufp = tmp;
2155 return 0;
2156}
2157
2158/*
2159 * Get a user extended attribute name from the XDR buffer.
2160 * It will not have the "user." prefix, so prepend it.
2161 * Lastly, check for nul characters in the name.
2162 */
2163static __be32
2164nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep)
2165{
23e50fe3
FL		 2166 char *name, *sp, *dp;
2167 u32 namelen, cnt;
830c7150 2168 __be32 *p;
23e50fe3 2169
830c7150
CL		 2170 if (xdr_stream_decode_u32(argp->xdr, &namelen) < 0)
2171 return nfserr_bad_xdr;
23e50fe3
FL		 2172 if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN))
2173 return nfserr_nametoolong;
23e50fe3 2174 if (namelen == 0)
830c7150
CL		 2175 return nfserr_bad_xdr;
2176 p = xdr_inline_decode(argp->xdr, namelen);
2177 if (!p)
2178 return nfserr_bad_xdr;
23e50fe3
FL		 2179 name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1);
2180 if (!name)
2181 return nfserr_jukebox;
23e50fe3
FL		 2182 memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2183
2184 /*
2185 * Copy the extended attribute name over while checking for 0
2186 * characters.
2187 */
2188 sp = (char *)p;
2189 dp = name + XATTR_USER_PREFIX_LEN;
2190 cnt = namelen;
2191
2192 while (cnt-- > 0) {
2193 if (*sp == '\0')
830c7150 2194 return nfserr_bad_xdr;
23e50fe3
FL		 2195 *dp++ = *sp++;
2196 }
2197 *dp = '\0';
2198
2199 *namep = name;
2200
830c7150 2201 return nfs_ok;
23e50fe3
FL		 2202}
2203
2204/*
2205 * A GETXATTR op request comes without a length specifier. We just set the
2206 * maximum length for the reply based on XATTR_SIZE_MAX and the maximum
2207 * channel reply size. nfsd_getxattr will probe the length of the xattr,
2208 * check it against getxa_len, and allocate + return the value.
2209 */
2210static __be32
2211nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp,
e78e274e 2212 union nfsd4_op_u *u)
23e50fe3 2213{
e78e274e 2214 struct nfsd4_getxattr *getxattr = &u->getxattr;
23e50fe3
FL		 2215 __be32 status;
2216 u32 maxcount;
2217
3fdc5464 2218 memset(getxattr, 0, sizeof(*getxattr));
23e50fe3
FL		 2219 status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name);
2220 if (status)
2221 return status;
2222
2223 maxcount = svc_max_payload(argp->rqstp);
2224 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2225
2226 getxattr->getxa_len = maxcount;
3fdc5464 2227 return nfs_ok;
23e50fe3
FL		 2228}
2229
2230static __be32
2231nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp,
e78e274e 2232 union nfsd4_op_u *u)
23e50fe3 2233{
e78e274e 2234 struct nfsd4_setxattr *setxattr = &u->setxattr;
23e50fe3 2235 u32 flags, maxcount, size;
403366a7 2236 __be32 status;
23e50fe3 2237
3fdc5464
CL		 2238 memset(setxattr, 0, sizeof(*setxattr));
2239
403366a7
CL		 2240 if (xdr_stream_decode_u32(argp->xdr, &flags) < 0)
2241 return nfserr_bad_xdr;
23e50fe3
FL		 2242
2243 if (flags > SETXATTR4_REPLACE)
2244 return nfserr_inval;
2245 setxattr->setxa_flags = flags;
2246
2247 status = nfsd4_decode_xattr_name(argp, &setxattr->setxa_name);
2248 if (status)
2249 return status;
2250
2251 maxcount = svc_max_payload(argp->rqstp);
2252 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2253
403366a7
CL		 2254 if (xdr_stream_decode_u32(argp->xdr, &size) < 0)
2255 return nfserr_bad_xdr;
23e50fe3
FL		 2256 if (size > maxcount)
2257 return nfserr_xattr2big;
2258
2259 setxattr->setxa_len = size;
2260 if (size > 0) {
c1346a12 2261 struct xdr_buf payload;
23e50fe3 2262
c1346a12 2263 if (!xdr_stream_subsegment(argp->xdr, &payload, size))
403366a7 2264 return nfserr_bad_xdr;
c1346a12
CL		 2265 status = nfsd4_vbuf_from_vector(argp, &payload,
2266 &setxattr->setxa_buf, size);
23e50fe3
FL		 2267 }
2268
403366a7 2269 return nfs_ok;
23e50fe3
FL		 2270}
2271
2272static __be32
2273nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp,
e78e274e 2274 union nfsd4_op_u *u)
23e50fe3 2275{
e78e274e 2276 struct nfsd4_listxattrs *listxattrs = &u->listxattrs;
23e50fe3
FL		 2277 u32 maxcount;
2278
3fdc5464
CL		 2279 memset(listxattrs, 0, sizeof(*listxattrs));
2280
2212036c
CL		 2281 if (xdr_stream_decode_u64(argp->xdr, &listxattrs->lsxa_cookie) < 0)
2282 return nfserr_bad_xdr;
23e50fe3
FL		 2283
2284 /*
2285 * If the cookie is too large to have even one user.x attribute
2286 * plus trailing '\0' left in a maximum size buffer, it's invalid.
2287 */
2288 if (listxattrs->lsxa_cookie >=
2289 (XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2)))
2290 return nfserr_badcookie;
2291
2212036c
CL		 2292 if (xdr_stream_decode_u32(argp->xdr, &maxcount) < 0)
2293 return nfserr_bad_xdr;
23e50fe3
FL		 2294 if (maxcount < 8)
2295 /* Always need at least 2 words (length and one character) */
2296 return nfserr_inval;
2297
2298 maxcount = min(maxcount, svc_max_payload(argp->rqstp));
2299 listxattrs->lsxa_maxcount = maxcount;
2300
2212036c 2301 return nfs_ok;
23e50fe3
FL		 2302}
2303
2304static __be32
2305nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp,
e78e274e 2306 union nfsd4_op_u *u)
23e50fe3 2307{
e78e274e 2308 struct nfsd4_removexattr *removexattr = &u->removexattr;
3fdc5464 2309 memset(removexattr, 0, sizeof(*removexattr));
23e50fe3
FL		 2310 return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name);
2311}
2312
347e0ad9 2313static __be32
e78e274e 2314nfsd4_decode_noop(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p)
347e0ad9
BH		 2315{
2316 return nfs_ok;
2317}
2318
3c375c6f 2319static __be32
e78e274e 2320nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p)
3c375c6f 2321{
1e685ec2 2322 return nfserr_notsupp;
3c375c6f
BH		 2323}
2324
e78e274e 2325typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u);
347e0ad9 2326
c1df609d 2327static const nfsd4_dec nfsd4_dec_ops[] = {
e78e274e
KC		 2328 [OP_ACCESS] = nfsd4_decode_access,
2329 [OP_CLOSE] = nfsd4_decode_close,
2330 [OP_COMMIT] = nfsd4_decode_commit,
2331 [OP_CREATE] = nfsd4_decode_create,
2332 [OP_DELEGPURGE] = nfsd4_decode_notsupp,
2333 [OP_DELEGRETURN] = nfsd4_decode_delegreturn,
2334 [OP_GETATTR] = nfsd4_decode_getattr,
2335 [OP_GETFH] = nfsd4_decode_noop,
2336 [OP_LINK] = nfsd4_decode_link,
2337 [OP_LOCK] = nfsd4_decode_lock,
2338 [OP_LOCKT] = nfsd4_decode_lockt,
2339 [OP_LOCKU] = nfsd4_decode_locku,
2340 [OP_LOOKUP] = nfsd4_decode_lookup,
2341 [OP_LOOKUPP] = nfsd4_decode_noop,
2342 [OP_NVERIFY] = nfsd4_decode_verify,
2343 [OP_OPEN] = nfsd4_decode_open,
2344 [OP_OPENATTR] = nfsd4_decode_notsupp,
2345 [OP_OPEN_CONFIRM] = nfsd4_decode_open_confirm,
2346 [OP_OPEN_DOWNGRADE] = nfsd4_decode_open_downgrade,
2347 [OP_PUTFH] = nfsd4_decode_putfh,
2348 [OP_PUTPUBFH] = nfsd4_decode_putpubfh,
2349 [OP_PUTROOTFH] = nfsd4_decode_noop,
2350 [OP_READ] = nfsd4_decode_read,
2351 [OP_READDIR] = nfsd4_decode_readdir,
2352 [OP_READLINK] = nfsd4_decode_noop,
2353 [OP_REMOVE] = nfsd4_decode_remove,
2354 [OP_RENAME] = nfsd4_decode_rename,
2355 [OP_RENEW] = nfsd4_decode_renew,
2356 [OP_RESTOREFH] = nfsd4_decode_noop,
2357 [OP_SAVEFH] = nfsd4_decode_noop,
2358 [OP_SECINFO] = nfsd4_decode_secinfo,
2359 [OP_SETATTR] = nfsd4_decode_setattr,
2360 [OP_SETCLIENTID] = nfsd4_decode_setclientid,
2361 [OP_SETCLIENTID_CONFIRM] = nfsd4_decode_setclientid_confirm,
2362 [OP_VERIFY] = nfsd4_decode_verify,
2363 [OP_WRITE] = nfsd4_decode_write,
2364 [OP_RELEASE_LOCKOWNER] = nfsd4_decode_release_lockowner,
2db134eb
AA		 2365
2366 /* new operations for NFSv4.1 */
e78e274e
KC		 2367 [OP_BACKCHANNEL_CTL] = nfsd4_decode_backchannel_ctl,
2368 [OP_BIND_CONN_TO_SESSION] = nfsd4_decode_bind_conn_to_session,
2369 [OP_EXCHANGE_ID] = nfsd4_decode_exchange_id,
2370 [OP_CREATE_SESSION] = nfsd4_decode_create_session,
2371 [OP_DESTROY_SESSION] = nfsd4_decode_destroy_session,
2372 [OP_FREE_STATEID] = nfsd4_decode_free_stateid,
2373 [OP_GET_DIR_DELEGATION] = nfsd4_decode_notsupp,
9cf514cc 2374#ifdef CONFIG_NFSD_PNFS
e78e274e
KC		 2375 [OP_GETDEVICEINFO] = nfsd4_decode_getdeviceinfo,
2376 [OP_GETDEVICELIST] = nfsd4_decode_notsupp,
2377 [OP_LAYOUTCOMMIT] = nfsd4_decode_layoutcommit,
2378 [OP_LAYOUTGET] = nfsd4_decode_layoutget,
2379 [OP_LAYOUTRETURN] = nfsd4_decode_layoutreturn,
9cf514cc 2380#else
e78e274e
KC		 2381 [OP_GETDEVICEINFO] = nfsd4_decode_notsupp,
2382 [OP_GETDEVICELIST] = nfsd4_decode_notsupp,
2383 [OP_LAYOUTCOMMIT] = nfsd4_decode_notsupp,
2384 [OP_LAYOUTGET] = nfsd4_decode_notsupp,
2385 [OP_LAYOUTRETURN] = nfsd4_decode_notsupp,
9cf514cc 2386#endif
e78e274e
KC		 2387 [OP_SECINFO_NO_NAME] = nfsd4_decode_secinfo_no_name,
2388 [OP_SEQUENCE] = nfsd4_decode_sequence,
2389 [OP_SET_SSV] = nfsd4_decode_notsupp,
2390 [OP_TEST_STATEID] = nfsd4_decode_test_stateid,
2391 [OP_WANT_DELEGATION] = nfsd4_decode_notsupp,
2392 [OP_DESTROY_CLIENTID] = nfsd4_decode_destroy_clientid,
2393 [OP_RECLAIM_COMPLETE] = nfsd4_decode_reclaim_complete,
87a15a80
AS		 2394
2395 /* new operations for NFSv4.2 */
e78e274e
KC		 2396 [OP_ALLOCATE] = nfsd4_decode_fallocate,
2397 [OP_COPY] = nfsd4_decode_copy,
2398 [OP_COPY_NOTIFY] = nfsd4_decode_copy_notify,
2399 [OP_DEALLOCATE] = nfsd4_decode_fallocate,
2400 [OP_IO_ADVISE] = nfsd4_decode_notsupp,
2401 [OP_LAYOUTERROR] = nfsd4_decode_notsupp,
2402 [OP_LAYOUTSTATS] = nfsd4_decode_notsupp,
2403 [OP_OFFLOAD_CANCEL] = nfsd4_decode_offload_status,
2404 [OP_OFFLOAD_STATUS] = nfsd4_decode_offload_status,
2405 [OP_READ_PLUS] = nfsd4_decode_read,
2406 [OP_SEEK] = nfsd4_decode_seek,
2407 [OP_WRITE_SAME] = nfsd4_decode_notsupp,
2408 [OP_CLONE] = nfsd4_decode_clone,
23e50fe3 2409 /* RFC 8276 extended atributes operations */
e78e274e
KC		 2410 [OP_GETXATTR] = nfsd4_decode_getxattr,
2411 [OP_SETXATTR] = nfsd4_decode_setxattr,
2412 [OP_LISTXATTRS] = nfsd4_decode_listxattrs,
2413 [OP_REMOVEXATTR] = nfsd4_decode_removexattr,
2db134eb
AA		 2414};
2415
e1a90ebd
AS		 2416static inline bool
2417nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
2418{
8217d146 2419 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 2420 return false;
8217d146 2421 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 2422 return false;
8217d146
AS		 2423 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
2424 return false;
2425 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 2426 return false;
2427 return true;
2428}
f2feb96b 2429
c44b31c2 2430static bool
1da177e4
LT		 2431nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
2432{
1da177e4 2433 struct nfsd4_op *op;
1091006c 2434 bool cachethis = false;
a5cddc88
BF		 2435 int auth_slack= argp->rqstp->rq_auth_slack;
2436 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 2437 int readcount = 0;
2438 int readbytes = 0;
d9b74bda 2439 __be32 *p;
1da177e4
LT		 2440 int i;
2441
d9b74bda 2442 if (xdr_stream_decode_u32(argp->xdr, &argp->taglen) < 0)
c44b31c2 2443 return false;
d9b74bda
CL		 2444 max_reply += XDR_UNIT;
2445 argp->tag = NULL;
2446 if (unlikely(argp->taglen)) {
2447 if (argp->taglen > NFSD4_MAX_TAGLEN)
c44b31c2 2448 return false;
d9b74bda
CL		 2449 p = xdr_inline_decode(argp->xdr, argp->taglen);
2450 if (!p)
c44b31c2 2451 return false;
7b723008 2452 argp->tag = svcxdr_savemem(argp, p, argp->taglen);
d9b74bda 2453 if (!argp->tag)
c44b31c2 2454 return false;
d9b74bda
CL		 2455 max_reply += xdr_align_size(argp->taglen);
2456 }
2457
2458 if (xdr_stream_decode_u32(argp->xdr, &argp->minorversion) < 0)
c44b31c2 2459 return false;
7518a3dc 2460 if (xdr_stream_decode_u32(argp->xdr, &argp->client_opcnt) < 0)
c44b31c2 2461 return false;
7518a3dc
CL		 2462 argp->opcnt = min_t(u32, argp->client_opcnt,
2463 NFSD_MAX_OPS_PER_COMPOUND);
1da177e4 2464
e8c96f8c 2465 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
80e591ce 2466 argp->ops = vcalloc(argp->opcnt, sizeof(*argp->ops));
1da177e4
LT		 2467 if (!argp->ops) {
2468 argp->ops = argp->iops;
c44b31c2 2469 return false;
1da177e4
LT		 2470 }
2471 }
2472
e1a90ebd 2473 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 2474 argp->opcnt = 0;
2475
1da177e4
LT		 2476 for (i = 0; i < argp->opcnt; i++) {
2477 op = &argp->ops[i];
2478 op->replay = NULL;
804d8e0a 2479 op->opdesc = NULL;
1da177e4 2480
3a237b4a 2481 if (xdr_stream_decode_u32(argp->xdr, &op->opnum) < 0)
c44b31c2 2482 return false;
08281341 2483 if (nfsd4_opnum_in_range(argp, op)) {
804d8e0a 2484 op->opdesc = OPDESC(op);
e1a90ebd 2485 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
08281341
CL		 2486 if (op->status != nfs_ok)
2487 trace_nfsd_compound_decode_err(argp->rqstp,
2488 argp->opcnt, i,
2489 op->opnum,
2490 op->status);
2491 } else {
1da177e4
LT		 2492 op->opnum = OP_ILLEGAL;
2493 op->status = nfserr_op_illegal;
1da177e4 2494 }
804d8e0a 2495
1091006c
BF		 2496 /*
2497 * We'll try to cache the result in the DRC if any one
2498 * op in the compound wants to be cached:
2499 */
2500 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 2501
528b8493 2502 if (op->opnum == OP_READ || op->opnum == OP_READ_PLUS) {
b0e35fda
BF		 2503 readcount++;
2504 readbytes += nfsd4_max_reply(argp->rqstp, op);
2505 } else
2506 max_reply += nfsd4_max_reply(argp->rqstp, op);
f7b43d0c 2507 /*
7323f0d2
KM		 2508 * OP_LOCK and OP_LOCKT may return a conflicting lock.
2509 * (Special case because it will just skip encoding this
2510 * if it runs out of xdr buffer space, and it is the only
2511 * operation that behaves this way.)
f7b43d0c 2512 */
7323f0d2 2513 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
f7b43d0c 2514 max_reply += NFS4_OPAQUE_LIMIT;
e372ba60
BF		 2515
2516 if (op->status) {
2517 argp->opcnt = i+1;
2518 break;
2519 }
1da177e4 2520 }
1091006c
BF		 2521 /* Sessions make the DRC unnecessary: */
2522 if (argp->minorversion)
2523 cachethis = false;
b0e35fda 2524 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 2525 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 2526
a2c91753 2527 argp->splice_ok = nfsd_read_splice_ok(argp->rqstp);
a5cddc88 2528 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
a2c91753 2529 argp->splice_ok = false;
b0e35fda 2530
c44b31c2 2531 return true;
1da177e4 2532}
1da177e4 2533
3283bf64
CL		 2534static __be32 nfsd4_encode_nfs_fh4(struct xdr_stream *xdr,
2535 struct knfsd_fh *fh_handle)
2536{
2537 return nfsd4_encode_opaque(xdr, fh_handle->fh_raw, fh_handle->fh_size);
2538}
2539
eed4d1ad 2540/* This is a frequently-encoded type; open-coded for speed */
26217679 2541static __be32 nfsd4_encode_nfstime4(struct xdr_stream *xdr,
eed4d1ad 2542 const struct timespec64 *tv)
26217679
CL		 2543{
2544 __be32 *p;
2545
2546 p = xdr_reserve_space(xdr, XDR_UNIT * 3);
2547 if (!p)
2548 return nfserr_resource;
eed4d1ad 2549 p = xdr_encode_hyper(p, tv->tv_sec);
26217679
CL		 2550 *p = cpu_to_be32(tv->tv_nsec);
2551 return nfs_ok;
2552}
2553
a460cda2
CL		 2554static __be32 nfsd4_encode_specdata4(struct xdr_stream *xdr,
2555 unsigned int major, unsigned int minor)
2556{
2557 __be32 status;
2558
2559 status = nfsd4_encode_uint32_t(xdr, major);
2560 if (status != nfs_ok)
2561 return status;
2562 return nfsd4_encode_uint32_t(xdr, minor);
2563}
2564
66a21db7 2565static __be32
263453d9 2566nfsd4_encode_change_info4(struct xdr_stream *xdr, const struct nfsd4_change_info *c)
c654b8a9 2567{
263453d9
CL		 2568 __be32 status;
2569
2570 status = nfsd4_encode_bool(xdr, c->atomic);
2571 if (status != nfs_ok)
2572 return status;
2573 status = nfsd4_encode_changeid4(xdr, c->before_change);
2574 if (status != nfs_ok)
2575 return status;
2576 return nfsd4_encode_changeid4(xdr, c->after_change);
c654b8a9 2577}
1da177e4 2578
21d316a7
CL		 2579static __be32 nfsd4_encode_netaddr4(struct xdr_stream *xdr,
2580 const struct nfs42_netaddr *addr)
2581{
2582 __be32 status;
2583
2584 /* na_r_netid */
2585 status = nfsd4_encode_opaque(xdr, addr->netid, addr->netid_len);
2586 if (status != nfs_ok)
2587 return status;
2588 /* na_r_addr */
2589 return nfsd4_encode_opaque(xdr, addr->addr, addr->addr_len);
2590}
2591
81c3f413 2592/* Encode as an array of strings the string given with components
e7a0444a 2593 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 2594 */
ddd1ea56
BF		 2595static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2596 char *components, char esc_enter,
2597 char esc_exit)
81c3f413 2598{
ddd1ea56 2599 __be32 *p;
082d4bd7
BF		 2600 __be32 pathlen;
2601 int pathlen_offset;
81c3f413 2602 int strlen, count=0;
e7a0444a 2603 char *str, *end, *next;
81c3f413
BF		 2604
2605 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 2606
2607 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 2608 p = xdr_reserve_space(xdr, 4);
2609 if (!p)
81c3f413 2610 return nfserr_resource;
082d4bd7
BF		 2611 p++; /* We will fill this in with @count later */
2612
81c3f413
BF		 2613 end = str = components;
2614 while (*end) {
e7a0444a
WAA		 2615 bool found_esc = false;
2616
2617 /* try to parse as esc_start, ..., esc_end, sep */
2618 if (*str == esc_enter) {
2619 for (; *end && (*end != esc_exit); end++)
2620 /* find esc_exit or end of string */;
2621 next = end + 1;
2622 if (*end && (!*next || *next == sep)) {
2623 str++;
2624 found_esc = true;
2625 }
2626 }
2627
2628 if (!found_esc)
2629 for (; *end && (*end != sep); end++)
2630 /* find sep or end of string */;
2631
81c3f413
BF		 2632 strlen = end - str;
2633 if (strlen) {
ddd1ea56
BF		 2634 p = xdr_reserve_space(xdr, strlen + 4);
2635 if (!p)
81c3f413 2636 return nfserr_resource;
0c0c267b 2637 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 2638 count++;
2639 }
2640 else
2641 end++;
5a64e569
BC		 2642 if (found_esc)
2643 end = next;
2644
81c3f413
BF		 2645 str = end;
2646 }
bf7491f1 2647 pathlen = htonl(count);
082d4bd7 2648 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 2649 return 0;
2650}
2651
e7a0444a
WAA		 2652/* Encode as an array of strings the string given with components
2653 * separated @sep.
2654 */
ddd1ea56
BF		 2655static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2656 char *components)
e7a0444a 2657{
ddd1ea56 2658 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 2659}
2660
ddd1ea56
BF		 2661static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2662 struct nfsd4_fs_location *location)
81c3f413 2663{
b37ad28b 2664 __be32 status;
81c3f413 2665
ddd1ea56 2666 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 2667 '[', ']');
81c3f413
BF		 2668 if (status)
2669 return status;
ddd1ea56 2670 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 2671 if (status)
2672 return status;
a1469a37 2673 return nfs_ok;
81c3f413
BF		 2674}
2675
a1469a37
CL		 2676static __be32 nfsd4_encode_pathname4(struct xdr_stream *xdr,
2677 const struct path *root,
2678 const struct path *path)
81c3f413 2679{
301f0268 2680 struct path cur = *path;
ddd1ea56 2681 __be32 *p;
ed748aac
TM		 2682 struct dentry **components = NULL;
2683 unsigned int ncomponents = 0;
2684 __be32 err = nfserr_jukebox;
81c3f413 2685
ed748aac 2686 dprintk("nfsd4_encode_components(");
81c3f413 2687
ed748aac
TM		 2688 path_get(&cur);
2689 /* First walk the path up to the nfsd root, and store the
2690 * dentries/path components in an array.
2691 */
2692 for (;;) {
b77a4b2e 2693 if (path_equal(&cur, root))
ed748aac
TM		 2694 break;
2695 if (cur.dentry == cur.mnt->mnt_root) {
2696 if (follow_up(&cur))
2697 continue;
2698 goto out_free;
2699 }
2700 if ((ncomponents & 15) == 0) {
2701 struct dentry **new;
2702 new = krealloc(components,
2703 sizeof(*new) * (ncomponents + 16),
2704 GFP_KERNEL);
2705 if (!new)
2706 goto out_free;
2707 components = new;
2708 }
2709 components[ncomponents++] = cur.dentry;
2710 cur.dentry = dget_parent(cur.dentry);
2711 }
ddd1ea56
BF		 2712 err = nfserr_resource;
2713 p = xdr_reserve_space(xdr, 4);
2714 if (!p)
ed748aac 2715 goto out_free;
c373b0a4 2716 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 2717
2718 while (ncomponents) {
2719 struct dentry *dentry = components[ncomponents - 1];
301f0268 2720 unsigned int len;
ed748aac 2721
301f0268
AV		 2722 spin_lock(&dentry->d_lock);
2723 len = dentry->d_name.len;
ddd1ea56
BF		 2724 p = xdr_reserve_space(xdr, len + 4);
2725 if (!p) {
301f0268 2726 spin_unlock(&dentry->d_lock);
ed748aac 2727 goto out_free;
301f0268 2728 }
0c0c267b 2729 p = xdr_encode_opaque(p, dentry->d_name.name, len);
a455589f 2730 dprintk("/%pd", dentry);
301f0268 2731 spin_unlock(&dentry->d_lock);
ed748aac
TM		 2732 dput(dentry);
2733 ncomponents--;
81c3f413 2734 }
ed748aac 2735
ed748aac
TM		 2736 err = 0;
2737out_free:
2738 dprintk(")\n");
2739 while (ncomponents)
2740 dput(components[--ncomponents]);
2741 kfree(components);
2742 path_put(&cur);
2743 return err;
2744}
2745
a1469a37
CL		 2746static __be32 nfsd4_encode_fs_locations4(struct xdr_stream *xdr,
2747 struct svc_rqst *rqstp,
2748 struct svc_export *exp)
ed748aac 2749{
a1469a37 2750 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
ed748aac 2751 struct svc_export *exp_ps;
a1469a37
CL		 2752 unsigned int i;
2753 __be32 status;
ed748aac 2754
a1469a37 2755 /* fs_root */
ed748aac
TM		 2756 exp_ps = rqst_find_fsidzero_export(rqstp);
2757 if (IS_ERR(exp_ps))
2758 return nfserrno(PTR_ERR(exp_ps));
a1469a37 2759 status = nfsd4_encode_pathname4(xdr, &exp_ps->ex_path, &exp->ex_path);
ed748aac 2760 exp_put(exp_ps);
a1469a37 2761 if (status != nfs_ok)
81c3f413 2762 return status;
a1469a37
CL		 2763
2764 /* locations<> */
2765 if (xdr_stream_encode_u32(xdr, fslocs->locations_count) != XDR_UNIT)
81c3f413 2766 return nfserr_resource;
a1469a37 2767 for (i = 0; i < fslocs->locations_count; i++) {
ddd1ea56 2768 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
a1469a37 2769 if (status != nfs_ok)
81c3f413
BF		 2770 return status;
2771 }
a1469a37
CL		 2772
2773 return nfs_ok;
81c3f413 2774}
1da177e4 2775
0207ee08
CL		 2776static __be32 nfsd4_encode_nfsace4(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2777 struct nfs4_ace *ace)
1da177e4 2778{
0207ee08
CL		 2779 __be32 status;
2780
2781 /* type */
2782 status = nfsd4_encode_acetype4(xdr, ace->type);
2783 if (status != nfs_ok)
2784 return nfserr_resource;
2785 /* flag */
2786 status = nfsd4_encode_aceflag4(xdr, ace->flag);
2787 if (status != nfs_ok)
2788 return nfserr_resource;
2789 /* access mask */
2790 status = nfsd4_encode_acemask4(xdr, ace->access_mask & NFS4_ACE_MASK_ALL);
2791 if (status != nfs_ok)
2792 return nfserr_resource;
2793 /* who */
3554116d 2794 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 2795 return nfs4_acl_write_who(xdr, ace->whotype);
0207ee08 2796 if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 2797 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
0207ee08 2798 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 2799}
2800
42ca0993
BF		 2801#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2802 FATTR4_WORD0_RDATTR_ERROR)
2803#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
c2227a39 2804#define WORD2_ABSENT_FS_ATTRS 0
42ca0993 2805
18032ca0
DQ		 2806#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2807static inline __be32
ddd1ea56
BF		 2808nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2809 void *context, int len)
18032ca0 2810{
ddd1ea56 2811 __be32 *p;
18032ca0 2812
ddd1ea56
BF		 2813 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2814 if (!p)
18032ca0
DQ		 2815 return nfserr_resource;
2816
2817 /*
2818 * For now we use a 0 here to indicate the null translation; in
2819 * the future we may place a call to translation code here.
2820 */
c373b0a4
BF		 2821 *p++ = cpu_to_be32(0); /* lfs */
2822 *p++ = cpu_to_be32(0); /* pi */
18032ca0 2823 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 2824 return 0;
2825}
2826#else
2827static inline __be32
ddd1ea56
BF		 2828nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2829 void *context, int len)
18032ca0
DQ		 2830{ return 0; }
2831#endif
2832
c2227a39 2833static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
42ca0993
BF		 2834{
2835 /* As per referral draft: */
2836 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2837 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2838 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2839 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2840 *rdattr_err = NFSERR_MOVED;
2841 else
2842 return nfserr_moved;
2843 }
2844 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2845 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
c2227a39 2846 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
42ca0993
BF		 2847 return 0;
2848}
1da177e4 2849
ae7095a7 2850
6106d911 2851static int nfsd4_get_mounted_on_ino(struct svc_export *exp, u64 *pino)
ae7095a7
BF		 2852{
2853 struct path path = exp->ex_path;
6106d911 2854 struct kstat stat;
ae7095a7
BF		 2855 int err;
2856
2857 path_get(&path);
2858 while (follow_up(&path)) {
2859 if (path.dentry != path.mnt->mnt_root)
2860 break;
2861 }
6106d911 2862 err = vfs_getattr(&path, &stat, STATX_INO, AT_STATX_SYNC_AS_STAT);
ae7095a7 2863 path_put(&path);
6106d911
JL		 2864 if (!err)
2865 *pino = stat.ino;
ae7095a7
BF		 2866 return err;
2867}
2868
75976de6 2869static __be32
e64301f5 2870nfsd4_encode_bitmap4(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
75976de6
KM		 2871{
2872 __be32 *p;
2873
2874 if (bmval2) {
e64301f5 2875 p = xdr_reserve_space(xdr, XDR_UNIT * 4);
75976de6
KM		 2876 if (!p)
2877 goto out_resource;
2878 *p++ = cpu_to_be32(3);
2879 *p++ = cpu_to_be32(bmval0);
2880 *p++ = cpu_to_be32(bmval1);
2881 *p++ = cpu_to_be32(bmval2);
2882 } else if (bmval1) {
e64301f5 2883 p = xdr_reserve_space(xdr, XDR_UNIT * 3);
75976de6
KM		 2884 if (!p)
2885 goto out_resource;
2886 *p++ = cpu_to_be32(2);
2887 *p++ = cpu_to_be32(bmval0);
2888 *p++ = cpu_to_be32(bmval1);
2889 } else {
e64301f5 2890 p = xdr_reserve_space(xdr, XDR_UNIT * 2);
75976de6
KM		 2891 if (!p)
2892 goto out_resource;
2893 *p++ = cpu_to_be32(1);
2894 *p++ = cpu_to_be32(bmval0);
2895 }
2896
e64301f5 2897 return nfs_ok;
75976de6
KM		 2898out_resource:
2899 return nfserr_resource;
2900}
2901
83ab8678 2902struct nfsd4_fattr_args {
c9090e27 2903 struct svc_rqst *rqstp;
83ab8678 2904 struct svc_fh *fhp;
36ed7e64 2905 struct svc_export *exp;
c9090e27 2906 struct dentry *dentry;
83ab8678
CL		 2907 struct kstat stat;
2908 struct kstatfs statfs;
2909 struct nfs4_acl *acl;
2910 u64 size;
f59388a5
CL		 2911#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2912 void *context;
2913 int contextlen;
2914#endif
83ab8678
CL		 2915 u32 rdattr_err;
2916 bool contextsupport;
1b9097e3 2917 bool ignore_crossmnt;
83ab8678
CL		 2918};
2919
fce7913b
CL		 2920typedef __be32(*nfsd4_enc_attr)(struct xdr_stream *xdr,
2921 const struct nfsd4_fattr_args *args);
2922
2923static __be32 nfsd4_encode_fattr4__noop(struct xdr_stream *xdr,
2924 const struct nfsd4_fattr_args *args)
2925{
2926 return nfs_ok;
2927}
2928
c88cb472
CL		 2929static __be32 nfsd4_encode_fattr4__true(struct xdr_stream *xdr,
2930 const struct nfsd4_fattr_args *args)
2931{
2932 return nfsd4_encode_bool(xdr, true);
2933}
2934
8c442288
CL		 2935static __be32 nfsd4_encode_fattr4__false(struct xdr_stream *xdr,
2936 const struct nfsd4_fattr_args *args)
2937{
2938 return nfsd4_encode_bool(xdr, false);
2939}
2940
c9090e27
CL		 2941static __be32 nfsd4_encode_fattr4_supported_attrs(struct xdr_stream *xdr,
2942 const struct nfsd4_fattr_args *args)
2943{
2944 struct nfsd4_compoundres *resp = args->rqstp->rq_resp;
2945 u32 minorversion = resp->cstate.minorversion;
2946 u32 supp[3];
2947
2948 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2949 if (!IS_POSIXACL(d_inode(args->dentry)))
2950 supp[0] &= ~FATTR4_WORD0_ACL;
2951 if (!args->contextsupport)
2952 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2953
2954 return nfsd4_encode_bitmap4(xdr, supp[0], supp[1], supp[2]);
2955}
2956
b06cf375
CL		 2957static __be32 nfsd4_encode_fattr4_type(struct xdr_stream *xdr,
2958 const struct nfsd4_fattr_args *args)
2959{
2960 __be32 *p;
2961
2962 p = xdr_reserve_space(xdr, XDR_UNIT);
2963 if (!p)
2964 return nfserr_resource;
2965
2966 switch (args->stat.mode & S_IFMT) {
2967 case S_IFIFO:
2968 *p = cpu_to_be32(NF4FIFO);
2969 break;
2970 case S_IFCHR:
2971 *p = cpu_to_be32(NF4CHR);
2972 break;
2973 case S_IFDIR:
2974 *p = cpu_to_be32(NF4DIR);
2975 break;
2976 case S_IFBLK:
2977 *p = cpu_to_be32(NF4BLK);
2978 break;
2979 case S_IFLNK:
2980 *p = cpu_to_be32(NF4LNK);
2981 break;
2982 case S_IFREG:
2983 *p = cpu_to_be32(NF4REG);
2984 break;
2985 case S_IFSOCK:
2986 *p = cpu_to_be32(NF4SOCK);
2987 break;
2988 default:
2989 return nfserr_serverfault;
2990 }
2991
2992 return nfs_ok;
2993}
2994
36ed7e64
CL		 2995static __be32 nfsd4_encode_fattr4_fh_expire_type(struct xdr_stream *xdr,
2996 const struct nfsd4_fattr_args *args)
2997{
2998 u32 mask;
2999
3000 mask = NFS4_FH_PERSISTENT;
3001 if (!(args->exp->ex_flags & NFSEXP_NOSUBTREECHECK))
3002 mask |= NFS4_FH_VOL_RENAME;
3003 return nfsd4_encode_uint32_t(xdr, mask);
3004}
3005
263453d9
CL		 3006static __be32 nfsd4_encode_fattr4_change(struct xdr_stream *xdr,
3007 const struct nfsd4_fattr_args *args)
3008{
3009 const struct svc_export *exp = args->exp;
3010 u64 c;
3011
3012 if (unlikely(exp->ex_flags & NFSEXP_V4ROOT)) {
3013 u32 flush_time = convert_to_wallclock(exp->cd->flush_time);
3014
3015 if (xdr_stream_encode_u32(xdr, flush_time) != XDR_UNIT)
3016 return nfserr_resource;
3017 if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT)
3018 return nfserr_resource;
3019 return nfs_ok;
3020 }
3021
3022 c = nfsd4_change_attribute(&args->stat, d_inode(args->dentry));
3023 return nfsd4_encode_changeid4(xdr, c);
3024}
3025
d0b28aad
CL		 3026static __be32 nfsd4_encode_fattr4_size(struct xdr_stream *xdr,
3027 const struct nfsd4_fattr_args *args)
3028{
3029 return nfsd4_encode_uint64_t(xdr, args->size);
3030}
3031
b6b62595
CL		 3032static __be32 nfsd4_encode_fattr4_fsid(struct xdr_stream *xdr,
3033 const struct nfsd4_fattr_args *args)
3034{
3035 __be32 *p;
3036
3037 p = xdr_reserve_space(xdr, XDR_UNIT * 2 + XDR_UNIT * 2);
3038 if (!p)
3039 return nfserr_resource;
3040
3041 if (unlikely(args->exp->ex_fslocs.migrated)) {
3042 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
3043 xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
3044 return nfs_ok;
3045 }
3046 switch (fsid_source(args->fhp)) {
3047 case FSIDSOURCE_FSID:
3048 p = xdr_encode_hyper(p, (u64)args->exp->ex_fsid);
3049 xdr_encode_hyper(p, (u64)0);
3050 break;
3051 case FSIDSOURCE_DEV:
3052 *p++ = xdr_zero;
3053 *p++ = cpu_to_be32(MAJOR(args->stat.dev));
3054 *p++ = xdr_zero;
3055 *p = cpu_to_be32(MINOR(args->stat.dev));
3056 break;
3057 case FSIDSOURCE_UUID:
3058 xdr_encode_opaque_fixed(p, args->exp->ex_uuid, EX_UUID_LEN);
3059 break;
3060 }
3061
3062 return nfs_ok;
3063}
3064
1252b283
CL		 3065static __be32 nfsd4_encode_fattr4_lease_time(struct xdr_stream *xdr,
3066 const struct nfsd4_fattr_args *args)
3067{
3068 struct nfsd_net *nn = net_generic(SVC_NET(args->rqstp), nfsd_net_id);
3069
3070 return nfsd4_encode_nfs_lease4(xdr, nn->nfsd4_lease);
3071}
3072
782448e1
CL		 3073static __be32 nfsd4_encode_fattr4_rdattr_error(struct xdr_stream *xdr,
3074 const struct nfsd4_fattr_args *args)
3075{
3076 return nfsd4_encode_uint32_t(xdr, args->rdattr_err);
3077}
3078
6515b7d7
CL		 3079static __be32 nfsd4_encode_fattr4_aclsupport(struct xdr_stream *xdr,
3080 const struct nfsd4_fattr_args *args)
3081{
3082 u32 mask;
3083
3084 mask = 0;
3085 if (IS_POSIXACL(d_inode(args->dentry)))
3086 mask = ACL4_SUPPORT_ALLOW_ACL | ACL4_SUPPORT_DENY_ACL;
3087 return nfsd4_encode_uint32_t(xdr, mask);
3088}
3089
07455dc4
CL		 3090static __be32 nfsd4_encode_fattr4_acl(struct xdr_stream *xdr,
3091 const struct nfsd4_fattr_args *args)
3092{
3093 struct nfs4_acl *acl = args->acl;
3094 struct nfs4_ace *ace;
3095 __be32 status;
3096
3097 /* nfsace4<> */
3098 if (!acl) {
3099 if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT)
3100 return nfserr_resource;
3101 } else {
3102 if (xdr_stream_encode_u32(xdr, acl->naces) != XDR_UNIT)
3103 return nfserr_resource;
3104 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
3105 status = nfsd4_encode_nfsace4(xdr, args->rqstp, ace);
3106 if (status != nfs_ok)
3107 return status;
3108 }
3109 }
3110 return nfs_ok;
3111}
3112
3283bf64
CL		 3113static __be32 nfsd4_encode_fattr4_filehandle(struct xdr_stream *xdr,
3114 const struct nfsd4_fattr_args *args)
3115{
3116 return nfsd4_encode_nfs_fh4(xdr, &args->fhp->fh_handle);
3117}
3118
eb7ece81
CL		 3119static __be32 nfsd4_encode_fattr4_fileid(struct xdr_stream *xdr,
3120 const struct nfsd4_fattr_args *args)
3121{
3122 return nfsd4_encode_uint64_t(xdr, args->stat.ino);
3123}
3124
b0c3a5f8
CL		 3125static __be32 nfsd4_encode_fattr4_files_avail(struct xdr_stream *xdr,
3126 const struct nfsd4_fattr_args *args)
3127{
3128 return nfsd4_encode_uint64_t(xdr, args->statfs.f_ffree);
3129}
3130
74361e2b
CL		 3131static __be32 nfsd4_encode_fattr4_files_free(struct xdr_stream *xdr,
3132 const struct nfsd4_fattr_args *args)
3133{
3134 return nfsd4_encode_uint64_t(xdr, args->statfs.f_ffree);
3135}
3136
b56b7526
CL		 3137static __be32 nfsd4_encode_fattr4_files_total(struct xdr_stream *xdr,
3138 const struct nfsd4_fattr_args *args)
3139{
3140 return nfsd4_encode_uint64_t(xdr, args->statfs.f_files);
3141}
3142
a1469a37
CL		 3143static __be32 nfsd4_encode_fattr4_fs_locations(struct xdr_stream *xdr,
3144 const struct nfsd4_fattr_args *args)
3145{
3146 return nfsd4_encode_fs_locations4(xdr, args->rqstp, args->exp);
3147}
3148
7c605dcc
CL		 3149static __be32 nfsd4_encode_fattr4_maxfilesize(struct xdr_stream *xdr,
3150 const struct nfsd4_fattr_args *args)
3151{
3152 struct super_block *sb = args->exp->ex_path.mnt->mnt_sb;
3153
3154 return nfsd4_encode_uint64_t(xdr, sb->s_maxbytes);
3155}
3156
b066aa5c
CL		 3157static __be32 nfsd4_encode_fattr4_maxlink(struct xdr_stream *xdr,
3158 const struct nfsd4_fattr_args *args)
3159{
3160 return nfsd4_encode_uint32_t(xdr, 255);
3161}
3162
9c1adacc
CL		 3163static __be32 nfsd4_encode_fattr4_maxname(struct xdr_stream *xdr,
3164 const struct nfsd4_fattr_args *args)
3165{
3166 return nfsd4_encode_uint32_t(xdr, args->statfs.f_namelen);
3167}
3168
c17195c3
CL		 3169static __be32 nfsd4_encode_fattr4_maxread(struct xdr_stream *xdr,
3170 const struct nfsd4_fattr_args *args)
3171{
3172 return nfsd4_encode_uint64_t(xdr, svc_max_payload(args->rqstp));
3173}
3174
951378dc
CL		 3175static __be32 nfsd4_encode_fattr4_maxwrite(struct xdr_stream *xdr,
3176 const struct nfsd4_fattr_args *args)
3177{
3178 return nfsd4_encode_uint64_t(xdr, svc_max_payload(args->rqstp));
3179}
3180
f4cf5042
CL		 3181static __be32 nfsd4_encode_fattr4_mode(struct xdr_stream *xdr,
3182 const struct nfsd4_fattr_args *args)
3183{
3184 return nfsd4_encode_mode4(xdr, args->stat.mode & S_IALLUGO);
3185}
3186
9f329fea
CL		 3187static __be32 nfsd4_encode_fattr4_numlinks(struct xdr_stream *xdr,
3188 const struct nfsd4_fattr_args *args)
3189{
3190 return nfsd4_encode_uint32_t(xdr, args->stat.nlink);
3191}
3192
fa51a520
CL		 3193static __be32 nfsd4_encode_fattr4_owner(struct xdr_stream *xdr,
3194 const struct nfsd4_fattr_args *args)
3195{
3196 return nfsd4_encode_user(xdr, args->rqstp, args->stat.uid);
3197}
3198
62f31e56
CL		 3199static __be32 nfsd4_encode_fattr4_owner_group(struct xdr_stream *xdr,
3200 const struct nfsd4_fattr_args *args)
3201{
3202 return nfsd4_encode_group(xdr, args->rqstp, args->stat.gid);
3203}
3204
a460cda2
CL		 3205static __be32 nfsd4_encode_fattr4_rawdev(struct xdr_stream *xdr,
3206 const struct nfsd4_fattr_args *args)
3207{
3208 return nfsd4_encode_specdata4(xdr, MAJOR(args->stat.rdev),
3209 MINOR(args->stat.rdev));
3210}
3211
83afa091
CL		 3212static __be32 nfsd4_encode_fattr4_space_avail(struct xdr_stream *xdr,
3213 const struct nfsd4_fattr_args *args)
3214{
3215 u64 avail = (u64)args->statfs.f_bavail * (u64)args->statfs.f_bsize;
3216
3217 return nfsd4_encode_uint64_t(xdr, avail);
3218}
3219
74ebc697
CL		 3220static __be32 nfsd4_encode_fattr4_space_free(struct xdr_stream *xdr,
3221 const struct nfsd4_fattr_args *args)
3222{
3223 u64 free = (u64)args->statfs.f_bfree * (u64)args->statfs.f_bsize;
3224
3225 return nfsd4_encode_uint64_t(xdr, free);
3226}
3227
d0cde979
CL		 3228static __be32 nfsd4_encode_fattr4_space_total(struct xdr_stream *xdr,
3229 const struct nfsd4_fattr_args *args)
3230{
3231 u64 total = (u64)args->statfs.f_blocks * (u64)args->statfs.f_bsize;
3232
3233 return nfsd4_encode_uint64_t(xdr, total);
3234}
3235
6d37ac3a
CL		 3236static __be32 nfsd4_encode_fattr4_space_used(struct xdr_stream *xdr,
3237 const struct nfsd4_fattr_args *args)
3238{
3239 return nfsd4_encode_uint64_t(xdr, (u64)args->stat.blocks << 9);
3240}
3241
eed4d1ad
CL		 3242static __be32 nfsd4_encode_fattr4_time_access(struct xdr_stream *xdr,
3243 const struct nfsd4_fattr_args *args)
3244{
3245 return nfsd4_encode_nfstime4(xdr, &args->stat.atime);
3246}
3247
2e38722d
CL		 3248static __be32 nfsd4_encode_fattr4_time_create(struct xdr_stream *xdr,
3249 const struct nfsd4_fattr_args *args)
3250{
3251 return nfsd4_encode_nfstime4(xdr, &args->stat.btime);
3252}
3253
993474e8
CL		 3254/*
3255 * ctime (in NFSv4, time_metadata) is not writeable, and the client
3256 * doesn't really care what resolution could theoretically be stored by
3257 * the filesystem.
3258 *
3259 * The client cares how close together changes can be while still
3260 * guaranteeing ctime changes. For most filesystems (which have
3261 * timestamps with nanosecond fields) that is limited by the resolution
3262 * of the time returned from current_time() (which I'm assuming to be
3263 * 1/HZ).
3264 */
3265static __be32 nfsd4_encode_fattr4_time_delta(struct xdr_stream *xdr,
3266 const struct nfsd4_fattr_args *args)
3267{
3268 const struct inode *inode = d_inode(args->dentry);
3269 u32 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
3270 struct timespec64 ts = ns_to_timespec64(ns);
3271
3272 return nfsd4_encode_nfstime4(xdr, &ts);
3273}
3274
673720bc
CL		 3275static __be32 nfsd4_encode_fattr4_time_metadata(struct xdr_stream *xdr,
3276 const struct nfsd4_fattr_args *args)
3277{
3278 return nfsd4_encode_nfstime4(xdr, &args->stat.ctime);
3279}
3280
d1828611
CL		 3281static __be32 nfsd4_encode_fattr4_time_modify(struct xdr_stream *xdr,
3282 const struct nfsd4_fattr_args *args)
3283{
3284 return nfsd4_encode_nfstime4(xdr, &args->stat.mtime);
3285}
3286
1b9097e3
CL		 3287static __be32 nfsd4_encode_fattr4_mounted_on_fileid(struct xdr_stream *xdr,
3288 const struct nfsd4_fattr_args *args)
3289{
3290 u64 ino;
3291 int err;
3292
3293 if (!args->ignore_crossmnt &&
3294 args->dentry == args->exp->ex_path.mnt->mnt_root) {
3295 err = nfsd4_get_mounted_on_ino(args->exp, &ino);
3296 if (err)
3297 return nfserrno(err);
3298 } else
3299 ino = args->stat.ino;
3300
3301 return nfsd4_encode_uint64_t(xdr, ino);
3302}
3303
e7a5b1b2
CL		 3304#ifdef CONFIG_NFSD_PNFS
3305
3306static __be32 nfsd4_encode_fattr4_fs_layout_types(struct xdr_stream *xdr,
3307 const struct nfsd4_fattr_args *args)
3308{
3309 unsigned long mask = args->exp->ex_layout_types;
3310 int i;
3311
3312 /* Hamming weight of @mask is the number of layout types to return */
3313 if (xdr_stream_encode_u32(xdr, hweight_long(mask)) != XDR_UNIT)
3314 return nfserr_resource;
3315 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
3316 if (mask & BIT(i)) {
3317 /* layouttype4 */
3318 if (xdr_stream_encode_u32(xdr, i) != XDR_UNIT)
3319 return nfserr_resource;
3320 }
3321 return nfs_ok;
3322}
3323
4c15878e
CL		 3324static __be32 nfsd4_encode_fattr4_layout_types(struct xdr_stream *xdr,
3325 const struct nfsd4_fattr_args *args)
3326{
3327 unsigned long mask = args->exp->ex_layout_types;
3328 int i;
3329
3330 /* Hamming weight of @mask is the number of layout types to return */
3331 if (xdr_stream_encode_u32(xdr, hweight_long(mask)) != XDR_UNIT)
3332 return nfserr_resource;
3333 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
3334 if (mask & BIT(i)) {
3335 /* layouttype4 */
3336 if (xdr_stream_encode_u32(xdr, i) != XDR_UNIT)
3337 return nfserr_resource;
3338 }
3339 return nfs_ok;
3340}
3341
4c584731
CL		 3342static __be32 nfsd4_encode_fattr4_layout_blksize(struct xdr_stream *xdr,
3343 const struct nfsd4_fattr_args *args)
3344{
3345 return nfsd4_encode_uint32_t(xdr, args->stat.blksize);
3346}
3347
e7a5b1b2
CL		 3348#endif
3349
345c3877
CL		 3350static __be32 nfsd4_encode_fattr4_suppattr_exclcreat(struct xdr_stream *xdr,
3351 const struct nfsd4_fattr_args *args)
3352{
3353 struct nfsd4_compoundres *resp = args->rqstp->rq_resp;
3354 u32 supp[3];
3355
3356 memcpy(supp, nfsd_suppattrs[resp->cstate.minorversion], sizeof(supp));
3357 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
3358 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
3359 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
3360
3361 return nfsd4_encode_bitmap4(xdr, supp[0], supp[1], supp[2]);
3362}
3363
f59388a5
CL		 3364#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3365static __be32 nfsd4_encode_fattr4_sec_label(struct xdr_stream *xdr,
3366 const struct nfsd4_fattr_args *args)
3367{
3368 return nfsd4_encode_security_label(xdr, args->rqstp,
3369 args->context, args->contextlen);
3370}
3371#endif
3372
b3dbf4e4
CL		 3373static __be32 nfsd4_encode_fattr4_xattr_support(struct xdr_stream *xdr,
3374 const struct nfsd4_fattr_args *args)
3375{
3376 int err = xattr_supports_user_prefix(d_inode(args->dentry));
3377
3378 return nfsd4_encode_bool(xdr, err == 0);
3379}
3380
fce7913b
CL		 3381static const nfsd4_enc_attr nfsd4_enc_fattr4_encode_ops[] = {
3382 [FATTR4_SUPPORTED_ATTRS] = nfsd4_encode_fattr4_supported_attrs,
3383 [FATTR4_TYPE] = nfsd4_encode_fattr4_type,
3384 [FATTR4_FH_EXPIRE_TYPE] = nfsd4_encode_fattr4_fh_expire_type,
3385 [FATTR4_CHANGE] = nfsd4_encode_fattr4_change,
3386 [FATTR4_SIZE] = nfsd4_encode_fattr4_size,
3387 [FATTR4_LINK_SUPPORT] = nfsd4_encode_fattr4__true,
3388 [FATTR4_SYMLINK_SUPPORT] = nfsd4_encode_fattr4__true,
3389 [FATTR4_NAMED_ATTR] = nfsd4_encode_fattr4__false,
3390 [FATTR4_FSID] = nfsd4_encode_fattr4_fsid,
3391 [FATTR4_UNIQUE_HANDLES] = nfsd4_encode_fattr4__true,
3392 [FATTR4_LEASE_TIME] = nfsd4_encode_fattr4_lease_time,
3393 [FATTR4_RDATTR_ERROR] = nfsd4_encode_fattr4_rdattr_error,
3394 [FATTR4_ACL] = nfsd4_encode_fattr4_acl,
3395 [FATTR4_ACLSUPPORT] = nfsd4_encode_fattr4_aclsupport,
3396 [FATTR4_ARCHIVE] = nfsd4_encode_fattr4__noop,
3397 [FATTR4_CANSETTIME] = nfsd4_encode_fattr4__true,
3398 [FATTR4_CASE_INSENSITIVE] = nfsd4_encode_fattr4__false,
3399 [FATTR4_CASE_PRESERVING] = nfsd4_encode_fattr4__true,
3400 [FATTR4_CHOWN_RESTRICTED] = nfsd4_encode_fattr4__true,
3401 [FATTR4_FILEHANDLE] = nfsd4_encode_fattr4_filehandle,
3402 [FATTR4_FILEID] = nfsd4_encode_fattr4_fileid,
3403 [FATTR4_FILES_AVAIL] = nfsd4_encode_fattr4_files_avail,
3404 [FATTR4_FILES_FREE] = nfsd4_encode_fattr4_files_free,
3405 [FATTR4_FILES_TOTAL] = nfsd4_encode_fattr4_files_total,
3406 [FATTR4_FS_LOCATIONS] = nfsd4_encode_fattr4_fs_locations,
3407 [FATTR4_HIDDEN] = nfsd4_encode_fattr4__noop,
3408 [FATTR4_HOMOGENEOUS] = nfsd4_encode_fattr4__true,
3409 [FATTR4_MAXFILESIZE] = nfsd4_encode_fattr4_maxfilesize,
3410 [FATTR4_MAXLINK] = nfsd4_encode_fattr4_maxlink,
3411 [FATTR4_MAXNAME] = nfsd4_encode_fattr4_maxname,
3412 [FATTR4_MAXREAD] = nfsd4_encode_fattr4_maxread,
3413 [FATTR4_MAXWRITE] = nfsd4_encode_fattr4_maxwrite,
3414 [FATTR4_MIMETYPE] = nfsd4_encode_fattr4__noop,
3415 [FATTR4_MODE] = nfsd4_encode_fattr4_mode,
3416 [FATTR4_NO_TRUNC] = nfsd4_encode_fattr4__true,
3417 [FATTR4_NUMLINKS] = nfsd4_encode_fattr4_numlinks,
3418 [FATTR4_OWNER] = nfsd4_encode_fattr4_owner,
3419 [FATTR4_OWNER_GROUP] = nfsd4_encode_fattr4_owner_group,
3420 [FATTR4_QUOTA_AVAIL_HARD] = nfsd4_encode_fattr4__noop,
3421 [FATTR4_QUOTA_AVAIL_SOFT] = nfsd4_encode_fattr4__noop,
3422 [FATTR4_QUOTA_USED] = nfsd4_encode_fattr4__noop,
3423 [FATTR4_RAWDEV] = nfsd4_encode_fattr4_rawdev,
3424 [FATTR4_SPACE_AVAIL] = nfsd4_encode_fattr4_space_avail,
3425 [FATTR4_SPACE_FREE] = nfsd4_encode_fattr4_space_free,
3426 [FATTR4_SPACE_TOTAL] = nfsd4_encode_fattr4_space_total,
3427 [FATTR4_SPACE_USED] = nfsd4_encode_fattr4_space_used,
3428 [FATTR4_SYSTEM] = nfsd4_encode_fattr4__noop,
3429 [FATTR4_TIME_ACCESS] = nfsd4_encode_fattr4_time_access,
3430 [FATTR4_TIME_ACCESS_SET] = nfsd4_encode_fattr4__noop,
3431 [FATTR4_TIME_BACKUP] = nfsd4_encode_fattr4__noop,
3432 [FATTR4_TIME_CREATE] = nfsd4_encode_fattr4_time_create,
3433 [FATTR4_TIME_DELTA] = nfsd4_encode_fattr4_time_delta,
3434 [FATTR4_TIME_METADATA] = nfsd4_encode_fattr4_time_metadata,
3435 [FATTR4_TIME_MODIFY] = nfsd4_encode_fattr4_time_modify,
3436 [FATTR4_TIME_MODIFY_SET] = nfsd4_encode_fattr4__noop,
3437 [FATTR4_MOUNTED_ON_FILEID] = nfsd4_encode_fattr4_mounted_on_fileid,
3438 [FATTR4_DIR_NOTIF_DELAY] = nfsd4_encode_fattr4__noop,
3439 [FATTR4_DIRENT_NOTIF_DELAY] = nfsd4_encode_fattr4__noop,
3440 [FATTR4_DACL] = nfsd4_encode_fattr4__noop,
3441 [FATTR4_SACL] = nfsd4_encode_fattr4__noop,
3442 [FATTR4_CHANGE_POLICY] = nfsd4_encode_fattr4__noop,
3443 [FATTR4_FS_STATUS] = nfsd4_encode_fattr4__noop,
3444
3445#ifdef CONFIG_NFSD_PNFS
3446 [FATTR4_FS_LAYOUT_TYPES] = nfsd4_encode_fattr4_fs_layout_types,
3447 [FATTR4_LAYOUT_HINT] = nfsd4_encode_fattr4__noop,
3448 [FATTR4_LAYOUT_TYPES] = nfsd4_encode_fattr4_layout_types,
3449 [FATTR4_LAYOUT_BLKSIZE] = nfsd4_encode_fattr4_layout_blksize,
3450 [FATTR4_LAYOUT_ALIGNMENT] = nfsd4_encode_fattr4__noop,
3451#else
3452 [FATTR4_FS_LAYOUT_TYPES] = nfsd4_encode_fattr4__noop,
3453 [FATTR4_LAYOUT_HINT] = nfsd4_encode_fattr4__noop,
3454 [FATTR4_LAYOUT_TYPES] = nfsd4_encode_fattr4__noop,
3455 [FATTR4_LAYOUT_BLKSIZE] = nfsd4_encode_fattr4__noop,
3456 [FATTR4_LAYOUT_ALIGNMENT] = nfsd4_encode_fattr4__noop,
3457#endif
3458
3459 [FATTR4_FS_LOCATIONS_INFO] = nfsd4_encode_fattr4__noop,
3460 [FATTR4_MDSTHRESHOLD] = nfsd4_encode_fattr4__noop,
3461 [FATTR4_RETENTION_GET] = nfsd4_encode_fattr4__noop,
3462 [FATTR4_RETENTION_SET] = nfsd4_encode_fattr4__noop,
3463 [FATTR4_RETENTEVT_GET] = nfsd4_encode_fattr4__noop,
3464 [FATTR4_RETENTEVT_SET] = nfsd4_encode_fattr4__noop,
3465 [FATTR4_RETENTION_HOLD] = nfsd4_encode_fattr4__noop,
3466 [FATTR4_MODE_SET_MASKED] = nfsd4_encode_fattr4__noop,
3467 [FATTR4_SUPPATTR_EXCLCREAT] = nfsd4_encode_fattr4_suppattr_exclcreat,
3468 [FATTR4_FS_CHARSET_CAP] = nfsd4_encode_fattr4__noop,
3469 [FATTR4_CLONE_BLKSIZE] = nfsd4_encode_fattr4__noop,
3470 [FATTR4_SPACE_FREED] = nfsd4_encode_fattr4__noop,
3471 [FATTR4_CHANGE_ATTR_TYPE] = nfsd4_encode_fattr4__noop,
3472
3473#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3474 [FATTR4_SEC_LABEL] = nfsd4_encode_fattr4_sec_label,
3475#else
3476 [FATTR4_SEC_LABEL] = nfsd4_encode_fattr4__noop,
3477#endif
3478
3479 [FATTR4_MODE_UMASK] = nfsd4_encode_fattr4__noop,
3480 [FATTR4_XATTR_SUPPORT] = nfsd4_encode_fattr4_xattr_support,
3481};
3482
1da177e4
LT		 3483/*
3484 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
3485 * ourselves.
1da177e4 3486 */
da2ebce6 3487static __be32
ae1131d4
CL		 3488nfsd4_encode_fattr4(struct svc_rqst *rqstp, struct xdr_stream *xdr,
3489 struct svc_fh *fhp, struct svc_export *exp,
3490 struct dentry *dentry, const u32 *bmval,
3491 int ignore_crossmnt)
1da177e4 3492{
83ab8678 3493 struct nfsd4_fattr_args args;
d50e6136 3494 struct svc_fh *tempfh = NULL;
1fcea5b2 3495 int starting_len = xdr->buf->len;
b3dbf4e4 3496 __be32 *attrlen_p, status;
082d4bd7 3497 int attrlen_offset;
b8dd7b9a 3498 int err;
7e705706
AA		 3499 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3500 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 3501 struct path path = {
3502 .mnt = exp->ex_path.mnt,
3503 .dentry = dentry,
3504 };
fce7913b
CL		 3505 union {
3506 u32 attrmask[3];
3507 unsigned long mask[2];
3508 } u;
fce7913b 3509 unsigned long bit;
1da177e4 3510
fce7913b
CL		 3511 WARN_ON_ONCE(bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1);
3512 WARN_ON_ONCE(!nfsd_attrs_supported(minorversion, bmval));
1da177e4 3513
c9090e27 3514 args.rqstp = rqstp;
36ed7e64 3515 args.exp = exp;
c9090e27 3516 args.dentry = dentry;
1b9097e3 3517 args.ignore_crossmnt = (ignore_crossmnt != 0);
c9090e27 3518
fce7913b
CL		 3519 /*
3520 * Make a local copy of the attribute bitmap that can be modified.
3521 */
3522 memset(&u, 0, sizeof(u));
3523 u.attrmask[0] = bmval[0];
3524 u.attrmask[1] = bmval[1];
3525 u.attrmask[2] = bmval[2];
3526
83ab8678 3527 args.rdattr_err = 0;
42ca0993 3528 if (exp->ex_fslocs.migrated) {
fce7913b
CL		 3529 status = fattr_handle_absent_fs(&u.attrmask[0], &u.attrmask[1],
3530 &u.attrmask[2], &args.rdattr_err);
42ca0993
BF		 3531 if (status)
3532 goto out;
3533 }
83ab8678 3534 args.size = 0;
fce7913b 3535 if (u.attrmask[0] & (FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE)) {
862bee84 3536 status = nfsd4_deleg_getattr_conflict(rqstp, d_inode(dentry));
fd19ca36
DN		 3537 if (status)
3538 goto out;
3539 }
42ca0993 3540
83ab8678 3541 err = vfs_getattr(&path, &args.stat,
638e3e7d
JL		 3542 STATX_BASIC_STATS | STATX_BTIME | STATX_CHANGE_COOKIE,
3543 AT_STATX_SYNC_AS_STAT);
b8dd7b9a 3544 if (err)
1da177e4 3545 goto out_nfserr;
862bee84 3546 args.size = args.stat.size;
83ab8678
CL		 3547
3548 if (!(args.stat.result_mask & STATX_BTIME))
e377a3e6 3549 /* underlying FS does not offer btime so we can't share it */
fce7913b
CL		 3550 u.attrmask[1] &= ~FATTR4_WORD1_TIME_CREATE;
3551 if ((u.attrmask[0] & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
12337901 3552 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
fce7913b 3553 (u.attrmask[1] & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1da177e4 3554 FATTR4_WORD1_SPACE_TOTAL))) {
83ab8678 3555 err = vfs_statfs(&path, &args.statfs);
b8dd7b9a 3556 if (err)
1da177e4
LT		 3557 goto out_nfserr;
3558 }
fce7913b
CL		 3559 if ((u.attrmask[0] & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) &&
3560 !fhp) {
d50e6136
BF		 3561 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
3562 status = nfserr_jukebox;
3563 if (!tempfh)
3564 goto out;
3565 fh_init(tempfh, NFS4_FHSIZE);
3566 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 3567 if (status)
3568 goto out;
83ab8678
CL		 3569 args.fhp = tempfh;
3570 } else
3571 args.fhp = fhp;
3572
3573 args.acl = NULL;
fce7913b 3574 if (u.attrmask[0] & FATTR4_WORD0_ACL) {
83ab8678 3575 err = nfsd4_get_nfs4_acl(rqstp, dentry, &args.acl);
0c9d65e7 3576 if (err == -EOPNOTSUPP)
fce7913b 3577 u.attrmask[0] &= ~FATTR4_WORD0_ACL;
0c9d65e7
AG		 3578 else if (err == -EINVAL) {
3579 status = nfserr_attrnotsupp;
3580 goto out;
3581 } else if (err != 0)
3582 goto out_nfserr;
1da177e4 3583 }
1da177e4 3584
83ab8678
CL		 3585 args.contextsupport = false;
3586
18032ca0 3587#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
f59388a5 3588 args.context = NULL;
fce7913b
CL		 3589 if ((u.attrmask[2] & FATTR4_WORD2_SECURITY_LABEL) ||
3590 u.attrmask[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
32ddd944
BF		 3591 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
3592 err = security_inode_getsecctx(d_inode(dentry),
f59388a5 3593 &args.context, &args.contextlen);
32ddd944
BF		 3594 else
3595 err = -EOPNOTSUPP;
83ab8678 3596 args.contextsupport = (err == 0);
fce7913b 3597 if (u.attrmask[2] & FATTR4_WORD2_SECURITY_LABEL) {
18032ca0 3598 if (err == -EOPNOTSUPP)
fce7913b 3599 u.attrmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
18032ca0
DQ		 3600 else if (err)
3601 goto out_nfserr;
3602 }
3603 }
3604#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
3605
ae1131d4 3606 /* attrmask */
fce7913b
CL		 3607 status = nfsd4_encode_bitmap4(xdr, u.attrmask[0],
3608 u.attrmask[1], u.attrmask[2]);
75976de6
KM		 3609 if (status)
3610 goto out;
082d4bd7 3611
ae1131d4 3612 /* attr_vals */
082d4bd7 3613 attrlen_offset = xdr->buf->len;
ab04de60
CL		 3614 attrlen_p = xdr_reserve_space(xdr, XDR_UNIT);
3615 if (!attrlen_p)
ddd1ea56 3616 goto out_resource;
fce7913b
CL		 3617 for_each_set_bit(bit, (const unsigned long *)&u.mask,
3618 ARRAY_SIZE(nfsd4_enc_fattr4_encode_ops)) {
3619 status = nfsd4_enc_fattr4_encode_ops[bit](xdr, &args);
4c584731
CL		 3620 if (status != nfs_ok)
3621 goto out;
9cf514cc 3622 }
ab04de60 3623 *attrlen_p = cpu_to_be32(xdr->buf->len - attrlen_offset - XDR_UNIT);
1da177e4
LT		 3624 status = nfs_ok;
3625
3626out:
ba4e55bb 3627#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
f59388a5
CL		 3628 if (args.context)
3629 security_release_secctx(args.context, args.contextlen);
ba4e55bb 3630#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
83ab8678 3631 kfree(args.acl);
18df11d0 3632 if (tempfh) {
d50e6136 3633 fh_put(tempfh);
18df11d0
YZ		 3634 kfree(tempfh);
3635 }
1fcea5b2
BF		 3636 if (status)
3637 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3638 return status;
3639out_nfserr:
b8dd7b9a 3640 status = nfserrno(err);
1da177e4
LT		 3641 goto out;
3642out_resource:
1da177e4
LT		 3643 status = nfserr_resource;
3644 goto out;
1da177e4
LT		 3645}
3646
2825a7f9
BF		 3647static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
3648 struct xdr_buf *buf, __be32 *p, int bytes)
3649{
3650 xdr->scratch.iov_len = 0;
3651 memset(buf, 0, sizeof(struct xdr_buf));
3652 buf->head[0].iov_base = p;
3653 buf->head[0].iov_len = 0;
3654 buf->len = 0;
3655 xdr->buf = buf;
3656 xdr->iov = buf->head;
3657 xdr->p = p;
3658 xdr->end = (void *)p + bytes;
3659 buf->buflen = bytes;
3660}
3661
d5184658
BF		 3662__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
3663 struct svc_fh *fhp, struct svc_export *exp,
3664 struct dentry *dentry, u32 *bmval,
3665 struct svc_rqst *rqstp, int ignore_crossmnt)
3666{
2825a7f9 3667 struct xdr_buf dummy;
d5184658
BF		 3668 struct xdr_stream xdr;
3669 __be32 ret;
3670
2825a7f9 3671 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
ae1131d4
CL		 3672 ret = nfsd4_encode_fattr4(rqstp, &xdr, fhp, exp, dentry, bmval,
3673 ignore_crossmnt);
d5184658
BF		 3674 *p = xdr.p;
3675 return ret;
3676}
3677
3fc5048c
CL		 3678/*
3679 * The buffer space for this field was reserved during a previous
3680 * call to nfsd4_encode_entry4().
3681 */
3682static void nfsd4_encode_entry4_nfs_cookie4(const struct nfsd4_readdir *readdir,
3683 u64 offset)
3684{
3685 __be64 cookie = cpu_to_be64(offset);
3686 struct xdr_stream *xdr = readdir->xdr;
3687
3688 if (!readdir->cookie_offset)
3689 return;
3690 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, &cookie,
3691 sizeof(cookie));
3692}
3693
c0ce6ec8
BF		 3694static inline int attributes_need_mount(u32 *bmval)
3695{
3696 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
3697 return 1;
3698 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
3699 return 1;
3700 return 0;
3701}
3702
b37ad28b 3703static __be32
a0f3c835
CL		 3704nfsd4_encode_entry4_fattr(struct nfsd4_readdir *cd, const char *name,
3705 int namlen)
1da177e4
LT		 3706{
3707 struct svc_export *exp = cd->rd_fhp->fh_export;
3708 struct dentry *dentry;
b37ad28b 3709 __be32 nfserr;
406a7ea9 3710 int ignore_crossmnt = 0;
1da177e4 3711
6c2d4798 3712 dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
1da177e4
LT		 3713 if (IS_ERR(dentry))
3714 return nfserrno(PTR_ERR(dentry));
3715
3716 exp_get(exp);
406a7ea9
FF		 3717 /*
3718 * In the case of a mountpoint, the client may be asking for
3719 * attributes that are only properties of the underlying filesystem
3720 * as opposed to the cross-mounted file system. In such a case,
3721 * we will not follow the cross mount and will fill the attribtutes
3722 * directly from the mountpoint dentry.
3723 */
3227fa41 3724 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 3725 int err;
3726
3227fa41
BF		 3727 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3728 && !attributes_need_mount(cd->rd_bmval)) {
3729 ignore_crossmnt = 1;
3730 goto out_encode;
3731 }
dcb488a3
AA		 3732 /*
3733 * Why the heck aren't we just using nfsd_lookup??
3734 * Different "."/".." handling? Something else?
3735 * At least, add a comment here to explain....
3736 */
021d3a72
BF		 3737 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3738 if (err) {
3739 nfserr = nfserrno(err);
1da177e4
LT		 3740 goto out_put;
3741 }
dcb488a3
AA		 3742 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3743 if (nfserr)
3744 goto out_put;
1da177e4
LT		 3745
3746 }
3227fa41 3747out_encode:
a0f3c835 3748 nfserr = nfsd4_encode_fattr4(cd->rd_rqstp, cd->xdr, NULL, exp, dentry,
ae1131d4 3749 cd->rd_bmval, ignore_crossmnt);
1da177e4
LT		 3750out_put:
3751 dput(dentry);
3752 exp_put(exp);
3753 return nfserr;
3754}
3755
a0d042f8
CL		 3756static __be32
3757nfsd4_encode_entry4_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 3758{
a0d042f8 3759 __be32 status;
1da177e4 3760
a0d042f8
CL		 3761 /* attrmask */
3762 status = nfsd4_encode_bitmap4(xdr, FATTR4_WORD0_RDATTR_ERROR, 0, 0);
3763 if (status != nfs_ok)
3764 return status;
3765 /* attr_vals */
3766 if (xdr_stream_encode_u32(xdr, XDR_UNIT) != XDR_UNIT)
3767 return nfserr_resource;
3768 /* rdattr_error */
3769 if (xdr_stream_encode_be32(xdr, nfserr) != XDR_UNIT)
3770 return nfserr_resource;
3771 return nfs_ok;
1da177e4
LT		 3772}
3773
3774static int
a0f3c835 3775nfsd4_encode_entry4(void *ccdv, const char *name, int namlen,
a0ad13ef 3776 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 3777{
a0ad13ef 3778 struct readdir_cd *ccd = ccdv;
1da177e4 3779 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 3780 struct xdr_stream *xdr = cd->xdr;
3781 int start_offset = xdr->buf->len;
3782 int cookie_offset;
aee37764 3783 u32 name_and_cookie;
561f0ed4 3784 int entry_bytes;
b37ad28b 3785 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 3786
3787 /* In nfsv4, "." and ".." never make it onto the wire.. */
3788 if (name && isdotent(name, namlen)) {
3789 cd->common.err = nfs_ok;
3790 return 0;
3791 }
3792
3fc5048c
CL		 3793 /* Encode the previous entry's cookie value */
3794 nfsd4_encode_entry4_nfs_cookie4(cd, offset);
1da177e4 3795
a1aee9aa 3796 if (xdr_stream_encode_item_present(xdr) != XDR_UNIT)
1da177e4 3797 goto fail;
a1aee9aa
CL		 3798
3799 /* Reserve send buffer space for this entry's cookie value. */
561f0ed4 3800 cookie_offset = xdr->buf->len;
a1aee9aa
CL		 3801 if (nfsd4_encode_nfs_cookie4(xdr, OFFSET_MAX) != nfs_ok)
3802 goto fail;
3803 if (nfsd4_encode_component4(xdr, name, namlen) != nfs_ok)
561f0ed4 3804 goto fail;
a0f3c835 3805 nfserr = nfsd4_encode_entry4_fattr(cd, name, namlen);
1da177e4
LT		 3806 switch (nfserr) {
3807 case nfs_ok:
1da177e4
LT		 3808 break;
3809 case nfserr_resource:
3810 nfserr = nfserr_toosmall;
3811 goto fail;
b2c0cea6 3812 case nfserr_noent:
f41c5ad2 3813 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 3814 goto skip_entry;
cad85337
JL		 3815 case nfserr_jukebox:
3816 /*
3817 * The pseudoroot should only display dentries that lead to
3818 * exports. If we get EJUKEBOX here, then we can't tell whether
3819 * this entry should be included. Just fail the whole READDIR
3820 * with NFS4ERR_DELAY in that case, and hope that the situation
3821 * will resolve itself by the client's next attempt.
3822 */
3823 if (cd->rd_fhp->fh_export->ex_flags & NFSEXP_V4ROOT)
3824 goto fail;
3825 fallthrough;
1da177e4
LT		 3826 default:
3827 /*
3828 * If the client requested the RDATTR_ERROR attribute,
3829 * we stuff the error code into this attribute
3830 * and continue. If this attribute was not requested,
3831 * then in accordance with the spec, we fail the
3832 * entire READDIR operation(!)
3833 */
3834 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3835 goto fail;
a0d042f8 3836 if (nfsd4_encode_entry4_rdattr_error(xdr, nfserr)) {
34081efc 3837 nfserr = nfserr_toosmall;
1da177e4 3838 goto fail;
34081efc 3839 }
1da177e4 3840 }
561f0ed4
BF		 3841 nfserr = nfserr_toosmall;
3842 entry_bytes = xdr->buf->len - start_offset;
3843 if (entry_bytes > cd->rd_maxcount)
3844 goto fail;
3845 cd->rd_maxcount -= entry_bytes;
aee37764 3846 /*
f2e717d6
TM		 3847 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", and
3848 * notes that it could be zero. If it is zero, then the server
3849 * should enforce only the rd_maxcount value.
aee37764 3850 */
f2e717d6
TM		 3851 if (cd->rd_dircount) {
3852 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3853 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3854 goto fail;
3855 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3856 if (!cd->rd_dircount)
3857 cd->rd_maxcount = 0;
3858 }
0ec016e3 3859
561f0ed4 3860 cd->cookie_offset = cookie_offset;
b2c0cea6 3861skip_entry:
1da177e4
LT		 3862 cd->common.err = nfs_ok;
3863 return 0;
3864fail:
561f0ed4 3865 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 3866 cd->common.err = nfserr;
3867 return -EINVAL;
3868}
3869
adaa7a50
CL		 3870static __be32
3871nfsd4_encode_verifier4(struct xdr_stream *xdr, const nfs4_verifier *verf)
3872{
3873 __be32 *p;
3874
3875 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3876 if (!p)
3877 return nfserr_resource;
3878 memcpy(p, verf->data, sizeof(verf->data));
3879 return nfs_ok;
3880}
3881
3882static __be32
3883nfsd4_encode_clientid4(struct xdr_stream *xdr, const clientid_t *clientid)
3884{
3885 __be32 *p;
3886
3887 p = xdr_reserve_space(xdr, sizeof(__be64));
3888 if (!p)
3889 return nfserr_resource;
3890 memcpy(p, clientid, sizeof(*clientid));
3891 return nfs_ok;
3892}
3893
40bb2baa 3894/* This is a frequently-encoded item; open-coded for speed */
d0a381dd 3895static __be32
40bb2baa 3896nfsd4_encode_stateid4(struct xdr_stream *xdr, const stateid_t *sid)
e2f282b9 3897{
bc749ca4 3898 __be32 *p;
e2f282b9 3899
40bb2baa 3900 p = xdr_reserve_space(xdr, NFS4_STATEID_SIZE);
d0a381dd
BF		 3901 if (!p)
3902 return nfserr_resource;
c373b0a4 3903 *p++ = cpu_to_be32(sid->si_generation);
40bb2baa
CL		 3904 memcpy(p, &sid->si_opaque, sizeof(sid->si_opaque));
3905 return nfs_ok;
e2f282b9
BH		 3906}
3907
65baa609
CL		 3908static __be32
3909nfsd4_encode_sessionid4(struct xdr_stream *xdr,
3910 const struct nfs4_sessionid *sessionid)
3911{
3912 return nfsd4_encode_opaque_fixed(xdr, sessionid->data,
3913 NFS4_MAX_SESSIONID_LEN);
3914}
3915
695e12f8 3916static __be32
e78e274e
KC		 3917nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr,
3918 union nfsd4_op_u *u)
1da177e4 3919{
e78e274e 3920 struct nfsd4_access *access = &u->access;
bddfdbcd 3921 struct xdr_stream *xdr = resp->xdr;
d38e570f 3922 __be32 status;
1da177e4 3923
d38e570f
CL		 3924 /* supported */
3925 status = nfsd4_encode_uint32_t(xdr, access->ac_supported);
3926 if (status != nfs_ok)
3927 return status;
3928 /* access */
3929 return nfsd4_encode_uint32_t(xdr, access->ac_resp_access);
1da177e4
LT		 3930}
3931
e78e274e
KC		 3932static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3933 union nfsd4_op_u *u)
1d1bc8f2 3934{
e78e274e 3935 struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session;
bddfdbcd 3936 struct xdr_stream *xdr = resp->xdr;
1d1bc8f2 3937
65baa609
CL		 3938 /* bctsr_sessid */
3939 nfserr = nfsd4_encode_sessionid4(xdr, &bcts->sessionid);
3940 if (nfserr != nfs_ok)
3941 return nfserr;
3942 /* bctsr_dir */
3943 if (xdr_stream_encode_u32(xdr, bcts->dir) != XDR_UNIT)
bac966d6 3944 return nfserr_resource;
65baa609
CL		 3945 /* bctsr_use_conn_in_rdma_mode */
3946 return nfsd4_encode_bool(xdr, false);
1d1bc8f2
BF		 3947}
3948
695e12f8 3949static __be32
e78e274e
KC		 3950nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr,
3951 union nfsd4_op_u *u)
1da177e4 3952{
e78e274e 3953 struct nfsd4_close *close = &u->close;
bddfdbcd 3954 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3955
40bb2baa
CL		 3956 /* open_stateid */
3957 return nfsd4_encode_stateid4(xdr, &close->cl_stateid);
1da177e4
LT		 3958}
3959
3960
695e12f8 3961static __be32
e78e274e
KC		 3962nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr,
3963 union nfsd4_op_u *u)
1da177e4 3964{
e78e274e 3965 struct nfsd4_commit *commit = &u->commit;
1da177e4 3966
adaa7a50 3967 return nfsd4_encode_verifier4(resp->xdr, &commit->co_verf);
1da177e4
LT		 3968}
3969
695e12f8 3970static __be32
e78e274e
KC		 3971nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr,
3972 union nfsd4_op_u *u)
1da177e4 3973{
e78e274e 3974 struct nfsd4_create *create = &u->create;
bddfdbcd 3975 struct xdr_stream *xdr = resp->xdr;
1da177e4 3976
e64301f5 3977 /* cinfo */
66a21db7
CL		 3978 nfserr = nfsd4_encode_change_info4(xdr, &create->cr_cinfo);
3979 if (nfserr)
3980 return nfserr;
e64301f5
CL		 3981 /* attrset */
3982 return nfsd4_encode_bitmap4(xdr, create->cr_bmval[0],
3983 create->cr_bmval[1], create->cr_bmval[2]);
1da177e4
LT		 3984}
3985
b37ad28b 3986static __be32
e78e274e
KC		 3987nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr,
3988 union nfsd4_op_u *u)
1da177e4 3989{
e78e274e 3990 struct nfsd4_getattr *getattr = &u->getattr;
1da177e4 3991 struct svc_fh *fhp = getattr->ga_fhp;
bddfdbcd 3992 struct xdr_stream *xdr = resp->xdr;
1da177e4 3993
ae1131d4
CL		 3994 /* obj_attributes */
3995 return nfsd4_encode_fattr4(resp->rqstp, xdr, fhp, fhp->fh_export,
3996 fhp->fh_dentry, getattr->ga_bmval, 0);
1da177e4
LT		 3997}
3998
695e12f8 3999static __be32
e78e274e
KC		 4000nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr,
4001 union nfsd4_op_u *u)
1da177e4 4002{
bddfdbcd 4003 struct xdr_stream *xdr = resp->xdr;
3283bf64 4004 struct svc_fh *fhp = u->getfh;
1da177e4 4005
3283bf64
CL		 4006 /* object */
4007 return nfsd4_encode_nfs_fh4(xdr, &fhp->fh_handle);
1da177e4
LT		 4008}
4009
c4a29c52
CL		 4010static __be32
4011nfsd4_encode_lock_owner4(struct xdr_stream *xdr, const clientid_t *clientid,
4012 const struct xdr_netobj *owner)
4013{
4014 __be32 status;
4015
4016 /* clientid */
4017 status = nfsd4_encode_clientid4(xdr, clientid);
4018 if (status != nfs_ok)
4019 return status;
4020 /* owner */
4021 return nfsd4_encode_opaque(xdr, owner->data, owner->len);
4022}
4023
d0a381dd 4024static __be32
c5641782
CL		 4025nfsd4_encode_lock4denied(struct xdr_stream *xdr,
4026 const struct nfsd4_lock_denied *ld)
1da177e4 4027{
c5641782 4028 __be32 status;
92d82e99 4029
c5641782
CL		 4030 /* offset */
4031 status = nfsd4_encode_offset4(xdr, ld->ld_start);
c4a29c52
CL		 4032 if (status != nfs_ok)
4033 return status;
c5641782
CL		 4034 /* length */
4035 status = nfsd4_encode_length4(xdr, ld->ld_length);
4036 if (status != nfs_ok)
4037 return status;
4038 /* locktype */
4039 if (xdr_stream_encode_u32(xdr, ld->ld_type) != XDR_UNIT)
4040 return nfserr_resource;
4041 /* owner */
4042 return nfsd4_encode_lock_owner4(xdr, &ld->ld_clientid,
4043 &ld->ld_owner);
1da177e4
LT		 4044}
4045
695e12f8 4046static __be32
e78e274e
KC		 4047nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr,
4048 union nfsd4_op_u *u)
1da177e4 4049{
e78e274e 4050 struct nfsd4_lock *lock = &u->lock;
bddfdbcd 4051 struct xdr_stream *xdr = resp->xdr;
c5641782 4052 __be32 status;
d0a381dd 4053
c5641782
CL		 4054 switch (nfserr) {
4055 case nfs_ok:
4056 /* resok4 */
4057 status = nfsd4_encode_stateid4(xdr, &lock->lk_resp_stateid);
4058 break;
4059 case nfserr_denied:
4060 /* denied */
4061 status = nfsd4_encode_lock4denied(xdr, &lock->lk_denied);
4062 break;
4063 default:
4064 return nfserr;
4065 }
4066 return status != nfs_ok ? status : nfserr;
1da177e4
LT		 4067}
4068
695e12f8 4069static __be32
e78e274e
KC		 4070nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr,
4071 union nfsd4_op_u *u)
1da177e4 4072{
e78e274e 4073 struct nfsd4_lockt *lockt = &u->lockt;
bddfdbcd 4074 struct xdr_stream *xdr = resp->xdr;
c5641782 4075 __be32 status;
d0a381dd 4076
c5641782
CL		 4077 if (nfserr == nfserr_denied) {
4078 /* denied */
4079 status = nfsd4_encode_lock4denied(xdr, &lockt->lt_denied);
4080 if (status != nfs_ok)
4081 return status;
4082 }
695e12f8 4083 return nfserr;
1da177e4
LT		 4084}
4085
695e12f8 4086static __be32
e78e274e
KC		 4087nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr,
4088 union nfsd4_op_u *u)
1da177e4 4089{
e78e274e 4090 struct nfsd4_locku *locku = &u->locku;
bddfdbcd 4091 struct xdr_stream *xdr = resp->xdr;
d0a381dd 4092
40bb2baa
CL		 4093 /* lock_stateid */
4094 return nfsd4_encode_stateid4(xdr, &locku->lu_stateid);
1da177e4
LT		 4095}
4096
4097
695e12f8 4098static __be32
e78e274e
KC		 4099nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr,
4100 union nfsd4_op_u *u)
1da177e4 4101{
e78e274e 4102 struct nfsd4_link *link = &u->link;
bddfdbcd 4103 struct xdr_stream *xdr = resp->xdr;
1da177e4 4104
66a21db7 4105 return nfsd4_encode_change_info4(xdr, &link->li_cinfo);
1da177e4
LT		 4106}
4107
e4ad7ce7
CL		 4108/*
4109 * This implementation does not yet support returning an ACE in an
4110 * OPEN that offers a delegation.
4111 */
4112static __be32
4113nfsd4_encode_open_nfsace4(struct xdr_stream *xdr)
4114{
4115 __be32 status;
4116
4117 /* type */
4118 status = nfsd4_encode_acetype4(xdr, NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
4119 if (status != nfs_ok)
4120 return nfserr_resource;
4121 /* flag */
4122 status = nfsd4_encode_aceflag4(xdr, 0);
4123 if (status != nfs_ok)
4124 return nfserr_resource;
4125 /* access mask */
4126 status = nfsd4_encode_acemask4(xdr, 0);
4127 if (status != nfs_ok)
4128 return nfserr_resource;
4129 /* who - empty for now */
4130 if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT)
4131 return nfserr_resource;
4132 return nfs_ok;
4133}
4134
4135static __be32
4136nfsd4_encode_open_read_delegation4(struct xdr_stream *xdr, struct nfsd4_open *open)
4137{
4138 __be32 status;
4139
4140 /* stateid */
4141 status = nfsd4_encode_stateid4(xdr, &open->op_delegate_stateid);
4142 if (status != nfs_ok)
4143 return status;
4144 /* recall */
4145 status = nfsd4_encode_bool(xdr, open->op_recall);
4146 if (status != nfs_ok)
4147 return status;
4148 /* permissions */
4149 return nfsd4_encode_open_nfsace4(xdr);
4150}
1da177e4 4151
32efa674
CL		 4152static __be32
4153nfsd4_encode_nfs_space_limit4(struct xdr_stream *xdr, u64 filesize)
4154{
4155 /* limitby */
4156 if (xdr_stream_encode_u32(xdr, NFS4_LIMIT_SIZE) != XDR_UNIT)
4157 return nfserr_resource;
4158 /* filesize */
4159 return nfsd4_encode_uint64_t(xdr, filesize);
4160}
4161
4162static __be32
4163nfsd4_encode_open_write_delegation4(struct xdr_stream *xdr,
4164 struct nfsd4_open *open)
4165{
4166 __be32 status;
4167
4168 /* stateid */
4169 status = nfsd4_encode_stateid4(xdr, &open->op_delegate_stateid);
4170 if (status != nfs_ok)
4171 return status;
4172 /* recall */
4173 status = nfsd4_encode_bool(xdr, open->op_recall);
4174 if (status != nfs_ok)
4175 return status;
4176 /* space_limit */
4177 status = nfsd4_encode_nfs_space_limit4(xdr, 0);
4178 if (status != nfs_ok)
4179 return status;
4180 return nfsd4_encode_open_nfsace4(xdr);
4181}
4182
6dd43c6d
CL		 4183static __be32
4184nfsd4_encode_open_none_delegation4(struct xdr_stream *xdr,
4185 struct nfsd4_open *open)
4186{
4187 __be32 status = nfs_ok;
4188
4189 /* ond_why */
4190 if (xdr_stream_encode_u32(xdr, open->op_why_no_deleg) != XDR_UNIT)
4191 return nfserr_resource;
4192 switch (open->op_why_no_deleg) {
4193 case WND4_CONTENTION:
4194 /* ond_server_will_push_deleg */
4195 status = nfsd4_encode_bool(xdr, false);
4196 break;
4197 case WND4_RESOURCE:
4198 /* ond_server_will_signal_avail */
4199 status = nfsd4_encode_bool(xdr, false);
4200 }
4201 return status;
4202}
4203
802e1913
CL		 4204static __be32
4205nfsd4_encode_open_delegation4(struct xdr_stream *xdr, struct nfsd4_open *open)
4206{
4207 __be32 status;
4208
4209 /* delegation_type */
4210 if (xdr_stream_encode_u32(xdr, open->op_delegate_type) != XDR_UNIT)
4211 return nfserr_resource;
4212 switch (open->op_delegate_type) {
4213 case NFS4_OPEN_DELEGATE_NONE:
4214 status = nfs_ok;
4215 break;
4216 case NFS4_OPEN_DELEGATE_READ:
4217 /* read */
4218 status = nfsd4_encode_open_read_delegation4(xdr, open);
4219 break;
4220 case NFS4_OPEN_DELEGATE_WRITE:
4221 /* write */
4222 status = nfsd4_encode_open_write_delegation4(xdr, open);
4223 break;
4224 case NFS4_OPEN_DELEGATE_NONE_EXT:
4225 /* od_whynone */
4226 status = nfsd4_encode_open_none_delegation4(xdr, open);
4227 break;
4228 default:
4229 status = nfserr_serverfault;
4230 }
4231
4232 return status;
4233}
4234
695e12f8 4235static __be32
e78e274e
KC		 4236nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr,
4237 union nfsd4_op_u *u)
1da177e4 4238{
e78e274e 4239 struct nfsd4_open *open = &u->open;
bddfdbcd 4240 struct xdr_stream *xdr = resp->xdr;
1da177e4 4241
841735b3 4242 /* stateid */
40bb2baa 4243 nfserr = nfsd4_encode_stateid4(xdr, &open->op_stateid);
841735b3 4244 if (nfserr != nfs_ok)
bac966d6 4245 return nfserr;
841735b3 4246 /* cinfo */
66a21db7 4247 nfserr = nfsd4_encode_change_info4(xdr, &open->op_cinfo);
841735b3 4248 if (nfserr != nfs_ok)
66a21db7 4249 return nfserr;
841735b3
CL		 4250 /* rflags */
4251 nfserr = nfsd4_encode_uint32_t(xdr, open->op_rflags);
4252 if (nfserr != nfs_ok)
4253 return nfserr;
4254 /* attrset */
e64301f5
CL		 4255 nfserr = nfsd4_encode_bitmap4(xdr, open->op_bmval[0],
4256 open->op_bmval[1], open->op_bmval[2]);
841735b3 4257 if (nfserr != nfs_ok)
bac966d6 4258 return nfserr;
802e1913
CL		 4259 /* delegation */
4260 return nfsd4_encode_open_delegation4(xdr, open);
1da177e4
LT		 4261}
4262
695e12f8 4263static __be32
e78e274e
KC		 4264nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr,
4265 union nfsd4_op_u *u)
1da177e4 4266{
e78e274e 4267 struct nfsd4_open_confirm *oc = &u->open_confirm;
bddfdbcd 4268 struct xdr_stream *xdr = resp->xdr;
d0a381dd 4269
40bb2baa
CL		 4270 /* open_stateid */
4271 return nfsd4_encode_stateid4(xdr, &oc->oc_resp_stateid);
1da177e4
LT		 4272}
4273
695e12f8 4274static __be32
e78e274e
KC		 4275nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr,
4276 union nfsd4_op_u *u)
1da177e4 4277{
e78e274e 4278 struct nfsd4_open_downgrade *od = &u->open_downgrade;
bddfdbcd 4279 struct xdr_stream *xdr = resp->xdr;
d0a381dd 4280
40bb2baa
CL		 4281 /* open_stateid */
4282 return nfsd4_encode_stateid4(xdr, &od->od_stateid);
1da177e4
LT		 4283}
4284
ba21e20b
CL		 4285/*
4286 * The operation of this function assumes that this is the only
4287 * READ operation in the COMPOUND. If there are multiple READs,
4288 * we use nfsd4_encode_readv().
4289 */
dc97618d
BF		 4290static __be32 nfsd4_encode_splice_read(
4291 struct nfsd4_compoundres *resp,
4292 struct nfsd4_read *read,
4293 struct file *file, unsigned long maxcount)
1da177e4 4294{
bddfdbcd 4295 struct xdr_stream *xdr = resp->xdr;
34a78b48 4296 struct xdr_buf *buf = xdr->buf;
76e5492b 4297 int status, space_left;
dc97618d 4298 __be32 nfserr;
1da177e4 4299
ba21e20b
CL		 4300 /*
4301 * Make sure there is room at the end of buf->head for
4302 * svcxdr_encode_opaque_pages() to create a tail buffer
4303 * to XDR-pad the payload.
4304 */
4305 if (xdr->iov != xdr->buf->head || xdr->end - xdr->p < 1)
d0a381dd 4306 return nfserr_resource;
dc97618d 4307
87c5942e 4308 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
24c7fb85
CL		 4309 file, read->rd_offset, &maxcount,
4310 &read->rd_eof);
87c5942e 4311 read->rd_length = maxcount;
76e5492b
CL		 4312 if (nfserr)
4313 goto out_err;
ba21e20b
CL		 4314 svcxdr_encode_opaque_pages(read->rd_rqstp, xdr, buf->pages,
4315 buf->page_base, maxcount);
76e5492b
CL		 4316 status = svc_encode_result_payload(read->rd_rqstp,
4317 buf->head[0].iov_len, maxcount);
4318 if (status) {
4319 nfserr = nfserrno(status);
4320 goto out_err;
b0e35fda 4321 }
1da177e4 4322
ba21e20b
CL		 4323 /*
4324 * Prepare to encode subsequent operations.
4325 *
4326 * xdr_truncate_encode() is not safe to use after a successful
4327 * splice read has been done, so the following stream
4328 * manipulations are open-coded.
4329 */
dc97618d 4330 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 4331 buf->buflen - buf->len);
4332 buf->buflen = buf->len + space_left;
dc97618d
BF		 4333 xdr->end = (__be32 *)((void *)xdr->end + space_left);
4334
ba21e20b 4335 return nfs_ok;
76e5492b
CL		 4336
4337out_err:
4338 /*
4339 * nfsd_splice_actor may have already messed with the
4340 * page length; reset it so as not to confuse
4341 * xdr_truncate_encode in our caller.
4342 */
4343 buf->page_len = 0;
4344 return nfserr;
dc97618d
BF		 4345}
4346
4347static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
4348 struct nfsd4_read *read,
4349 struct file *file, unsigned long maxcount)
4350{
bddfdbcd 4351 struct xdr_stream *xdr = resp->xdr;
0d32a6bb 4352 unsigned int base = xdr->buf->page_len & ~PAGE_MASK;
071ae99f 4353 unsigned int starting_len = xdr->buf->len;
5e64d85c 4354 __be32 zero = xdr_zero;
dc97618d 4355 __be32 nfserr;
1da177e4 4356
703d7521 4357 if (xdr_reserve_space_vec(xdr, maxcount) < 0)
403217f3 4358 return nfserr_resource;
1da177e4 4359
703d7521 4360 nfserr = nfsd_iter_read(resp->rqstp, read->rd_fhp, file,
0d32a6bb 4361 read->rd_offset, &maxcount, base,
703d7521 4362 &read->rd_eof);
87c5942e 4363 read->rd_length = maxcount;
dc97618d 4364 if (nfserr)
1da177e4 4365 return nfserr;
071ae99f 4366 if (svc_encode_result_payload(resp->rqstp, starting_len, maxcount))
41205539 4367 return nfserr_io;
071ae99f 4368 xdr_truncate_encode(xdr, starting_len + xdr_align_size(maxcount));
dc97618d 4369
5e64d85c
CL		 4370 write_bytes_to_xdr_buf(xdr->buf, starting_len + maxcount, &zero,
4371 xdr_pad_size(maxcount));
4372 return nfs_ok;
dc97618d
BF		 4373}
4374
4375static __be32
4376nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
e78e274e 4377 union nfsd4_op_u *u)
dc97618d 4378{
a2c91753 4379 struct nfsd4_compoundargs *argp = resp->rqstp->rq_argp;
e78e274e 4380 struct nfsd4_read *read = &u->read;
bddfdbcd 4381 struct xdr_stream *xdr = resp->xdr;
dc97618d 4382 int starting_len = xdr->buf->len;
a2c91753
CL		 4383 bool splice_ok = argp->splice_ok;
4384 unsigned long maxcount;
4385 struct file *file;
dc97618d 4386 __be32 *p;
dc97618d 4387
5c4583b2
JL		 4388 if (nfserr)
4389 return nfserr;
4390 file = read->rd_nf->nf_file;
4391
dc97618d
BF		 4392 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
4393 if (!p) {
c738b218 4394 WARN_ON_ONCE(splice_ok);
bac966d6 4395 return nfserr_resource;
dc97618d 4396 }
c738b218 4397 if (resp->xdr->buf->page_len && splice_ok) {
b0420980 4398 WARN_ON_ONCE(1);
06981d56 4399 return nfserr_serverfault;
dc97618d 4400 }
dc97618d
BF		 4401 xdr_commit_encode(xdr);
4402
0cb4d23a 4403 maxcount = min_t(unsigned long, read->rd_length,
68e8bb03 4404 (xdr->buf->buflen - xdr->buf->len));
dc97618d 4405
c738b218 4406 if (file->f_op->splice_read && splice_ok)
96bcad50 4407 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
dc97618d 4408 else
96bcad50 4409 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
28d5bc46 4410 if (nfserr) {
dc97618d 4411 xdr_truncate_encode(xdr, starting_len);
28d5bc46
CL		 4412 return nfserr;
4413 }
96bcad50 4414
28d5bc46
CL		 4415 p = xdr_encode_bool(p, read->rd_eof);
4416 *p = cpu_to_be32(read->rd_length);
4417 return nfs_ok;
1da177e4
LT		 4418}
4419
b37ad28b 4420static __be32
e78e274e
KC		 4421nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr,
4422 union nfsd4_op_u *u)
1da177e4 4423{
e78e274e 4424 struct nfsd4_readlink *readlink = &u->readlink;
99b002a1 4425 __be32 *p, *maxcount_p, zero = xdr_zero;
bddfdbcd 4426 struct xdr_stream *xdr = resp->xdr;
1fcea5b2 4427 int length_offset = xdr->buf->len;
99b002a1 4428 int maxcount, status;
1da177e4 4429
99b002a1
CL		 4430 maxcount_p = xdr_reserve_space(xdr, XDR_UNIT);
4431 if (!maxcount_p)
2825a7f9 4432 return nfserr_resource;
1da177e4 4433 maxcount = PAGE_SIZE;
d0a381dd 4434
476a7b1f
BF		 4435 p = xdr_reserve_space(xdr, maxcount);
4436 if (!p)
4e21ac4b 4437 return nfserr_resource;
1da177e4 4438 /*
fd4a0edf
MS		 4439 * XXX: By default, vfs_readlink() will truncate symlinks if they
4440 * would overflow the buffer. Is this kosher in NFSv4? If not, one
4441 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
4442 * that truncation occurred, and return NFS4ERR_RESOURCE.
1da177e4 4443 */
476a7b1f
BF		 4444 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
4445 (char *)p, &maxcount);
1da177e4 4446 if (nfserr == nfserr_isdir)
d3f627c8 4447 nfserr = nfserr_inval;
76e5492b
CL		 4448 if (nfserr)
4449 goto out_err;
4450 status = svc_encode_result_payload(readlink->rl_rqstp, length_offset,
4451 maxcount);
4452 if (status) {
4453 nfserr = nfserrno(status);
4454 goto out_err;
d3f627c8 4455 }
99b002a1
CL		 4456 *maxcount_p = cpu_to_be32(maxcount);
4457 xdr_truncate_encode(xdr, length_offset + 4 + xdr_align_size(maxcount));
4458 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, &zero,
4459 xdr_pad_size(maxcount));
4460 return nfs_ok;
76e5492b
CL		 4461
4462out_err:
4463 xdr_truncate_encode(xdr, length_offset);
4464 return nfserr;
1da177e4
LT		 4465}
4466
25c307ac
CL		 4467static __be32 nfsd4_encode_dirlist4(struct xdr_stream *xdr,
4468 struct nfsd4_readdir *readdir,
4469 u32 max_payload)
1da177e4 4470{
25c307ac 4471 int bytes_left, maxcount, starting_len = xdr->buf->len;
1da177e4 4472 loff_t offset;
25c307ac 4473 __be32 status;
1da177e4
LT		 4474
4475 /*
561f0ed4 4476 * Number of bytes left for directory entries allowing for the
25c307ac 4477 * final 8 bytes of the readdir and a following failed op.
561f0ed4 4478 */
25c307ac
CL		 4479 bytes_left = xdr->buf->buflen - xdr->buf->len -
4480 COMPOUND_ERR_SLACK_SPACE - XDR_UNIT * 2;
4481 if (bytes_left < 0)
4482 return nfserr_resource;
4483 maxcount = min_t(u32, readdir->rd_maxcount, max_payload);
4484
561f0ed4 4485 /*
25c307ac
CL		 4486 * The RFC defines rd_maxcount as the size of the
4487 * READDIR4resok structure, which includes the verifier
4488 * and the 8 bytes encoded at the end of this function.
1da177e4 4489 */
25c307ac
CL		 4490 if (maxcount < XDR_UNIT * 4)
4491 return nfserr_toosmall;
4492 maxcount = min_t(int, maxcount - XDR_UNIT * 4, bytes_left);
1da177e4 4493
25c307ac 4494 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0 */
aee37764 4495 if (!readdir->rd_dircount)
25c307ac 4496 readdir->rd_dircount = max_payload;
aee37764 4497
25c307ac 4498 /* *entries */
561f0ed4
BF		 4499 readdir->xdr = xdr;
4500 readdir->rd_maxcount = maxcount;
1da177e4 4501 readdir->common.err = 0;
561f0ed4 4502 readdir->cookie_offset = 0;
1da177e4 4503 offset = readdir->rd_cookie;
25c307ac 4504 status = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, &offset,
a0f3c835 4505 &readdir->common, nfsd4_encode_entry4);
25c307ac
CL		 4506 if (status)
4507 return status;
4508 if (readdir->common.err == nfserr_toosmall &&
4509 xdr->buf->len == starting_len) {
4510 /* No entries were encoded. Which limit did we hit? */
4511 if (maxcount - XDR_UNIT * 4 < bytes_left)
4512 /* It was the fault of rd_maxcount */
4513 return nfserr_toosmall;
4514 /* We ran out of buffer space */
4515 return nfserr_resource;
561f0ed4 4516 }
3fc5048c
CL		 4517 /* Encode the final entry's cookie value */
4518 nfsd4_encode_entry4_nfs_cookie4(readdir, offset);
25c307ac
CL		 4519 /* No entries follow */
4520 if (xdr_stream_encode_item_absent(xdr) != XDR_UNIT)
4521 return nfserr_resource;
1da177e4 4522
25c307ac
CL		 4523 /* eof */
4524 return nfsd4_encode_bool(xdr, readdir->common.err == nfserr_eof);
4525}
1da177e4 4526
25c307ac
CL		 4527static __be32
4528nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr,
4529 union nfsd4_op_u *u)
4530{
4531 struct nfsd4_readdir *readdir = &u->readdir;
4532 struct xdr_stream *xdr = resp->xdr;
4533 int starting_len = xdr->buf->len;
4534
4535 /* cookieverf */
4536 nfserr = nfsd4_encode_verifier4(xdr, &readdir->rd_verf);
4537 if (nfserr != nfs_ok)
4538 return nfserr;
4539
4540 /* reply */
4541 nfserr = nfsd4_encode_dirlist4(xdr, readdir, svc_max_payload(resp->rqstp));
4542 if (nfserr != nfs_ok)
4543 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 4544 return nfserr;
4545}
4546
695e12f8 4547static __be32
e78e274e
KC		 4548nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr,
4549 union nfsd4_op_u *u)
1da177e4 4550{
e78e274e 4551 struct nfsd4_remove *remove = &u->remove;
bddfdbcd 4552 struct xdr_stream *xdr = resp->xdr;
1da177e4 4553
66a21db7 4554 return nfsd4_encode_change_info4(xdr, &remove->rm_cinfo);
1da177e4
LT		 4555}
4556
695e12f8 4557static __be32
e78e274e
KC		 4558nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr,
4559 union nfsd4_op_u *u)
1da177e4 4560{
e78e274e 4561 struct nfsd4_rename *rename = &u->rename;
bddfdbcd 4562 struct xdr_stream *xdr = resp->xdr;
1da177e4 4563
66a21db7
CL		 4564 nfserr = nfsd4_encode_change_info4(xdr, &rename->rn_sinfo);
4565 if (nfserr)
4566 return nfserr;
4567 return nfsd4_encode_change_info4(xdr, &rename->rn_tinfo);
1da177e4
LT		 4568}
4569
91c7a905
CL		 4570static __be32
4571nfsd4_encode_rpcsec_gss_info(struct xdr_stream *xdr,
4572 struct rpcsec_gss_info *info)
4573{
4574 __be32 status;
4575
4576 /* oid */
4577 if (xdr_stream_encode_opaque(xdr, info->oid.data, info->oid.len) < 0)
4578 return nfserr_resource;
4579 /* qop */
4580 status = nfsd4_encode_qop4(xdr, info->qop);
4581 if (status != nfs_ok)
4582 return status;
4583 /* service */
4584 if (xdr_stream_encode_u32(xdr, info->service) != XDR_UNIT)
4585 return nfserr_resource;
4586
4587 return nfs_ok;
4588}
4589
695e12f8 4590static __be32
bac966d6 4591nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
dcb488a3 4592{
676e4ebd 4593 u32 i, nflavs, supported;
4796f457
BF		 4594 struct exp_flavor_info *flavs;
4595 struct exp_flavor_info def_flavs[2];
676e4ebd 4596 static bool report = true;
91c7a905
CL		 4597 __be32 *flavorsp;
4598 __be32 status;
dcb488a3 4599
4796f457
BF		 4600 if (exp->ex_nflavors) {
4601 flavs = exp->ex_flavors;
4602 nflavs = exp->ex_nflavors;
4603 } else { /* Handling of some defaults in absence of real secinfo: */
4604 flavs = def_flavs;
4605 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
4606 nflavs = 2;
4607 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
4608 flavs[1].pseudoflavor = RPC_AUTH_NULL;
4609 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
4610 nflavs = 1;
4611 flavs[0].pseudoflavor
4612 = svcauth_gss_flavor(exp->ex_client);
4613 } else {
4614 nflavs = 1;
4615 flavs[0].pseudoflavor
4616 = exp->ex_client->flavour->flavour;
4617 }
4618 }
4619
676e4ebd 4620 supported = 0;
91c7a905
CL		 4621 flavorsp = xdr_reserve_space(xdr, XDR_UNIT);
4622 if (!flavorsp)
bac966d6 4623 return nfserr_resource;
676e4ebd 4624
4796f457 4625 for (i = 0; i < nflavs; i++) {
676e4ebd 4626 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 4627 struct rpcsec_gss_info info;
dcb488a3 4628
676e4ebd
CL		 4629 if (rpcauth_get_gssinfo(pf, &info) == 0) {
4630 supported++;
91c7a905
CL		 4631
4632 /* flavor */
4633 status = nfsd4_encode_uint32_t(xdr, RPC_AUTH_GSS);
4634 if (status != nfs_ok)
4635 return status;
4636 /* flavor_info */
4637 status = nfsd4_encode_rpcsec_gss_info(xdr, &info);
4638 if (status != nfs_ok)
4639 return status;
676e4ebd
CL		 4640 } else if (pf < RPC_AUTH_MAXFLAVOR) {
4641 supported++;
91c7a905
CL		 4642
4643 /* flavor */
4644 status = nfsd4_encode_uint32_t(xdr, pf);
4645 if (status != nfs_ok)
4646 return status;
676e4ebd
CL		 4647 } else {
4648 if (report)
4649 pr_warn("NFS: SECINFO: security flavor %u "
4650 "is not supported\n", pf);
dcb488a3
AA		 4651 }
4652 }
a77c806f 4653
676e4ebd
CL		 4654 if (nflavs != supported)
4655 report = false;
91c7a905 4656 *flavorsp = cpu_to_be32(supported);
bac966d6 4657 return 0;
dcb488a3
AA		 4658}
4659
22b6dee8
MJ		 4660static __be32
4661nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
e78e274e 4662 union nfsd4_op_u *u)
22b6dee8 4663{
e78e274e 4664 struct nfsd4_secinfo *secinfo = &u->secinfo;
bddfdbcd 4665 struct xdr_stream *xdr = resp->xdr;
d0a381dd 4666
bac966d6 4667 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
22b6dee8
MJ		 4668}
4669
4670static __be32
4671nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
e78e274e 4672 union nfsd4_op_u *u)
22b6dee8 4673{
e78e274e 4674 struct nfsd4_secinfo_no_name *secinfo = &u->secinfo_no_name;
bddfdbcd 4675 struct xdr_stream *xdr = resp->xdr;
d0a381dd 4676
bac966d6 4677 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
22b6dee8
MJ		 4678}
4679
695e12f8 4680static __be32
e78e274e
KC		 4681nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr,
4682 union nfsd4_op_u *u)
1da177e4 4683{
e78e274e 4684 struct nfsd4_setattr *setattr = &u->setattr;
c3dcb45b 4685 __be32 status;
1da177e4 4686
c3dcb45b
CL		 4687 switch (nfserr) {
4688 case nfs_ok:
4689 /* attrsset */
4690 status = nfsd4_encode_bitmap4(resp->xdr, setattr->sa_bmval[0],
4691 setattr->sa_bmval[1],
4692 setattr->sa_bmval[2]);
4693 break;
4694 default:
4695 /* attrsset */
4696 status = nfsd4_encode_bitmap4(resp->xdr, 0, 0, 0);
1da177e4 4697 }
c3dcb45b 4698 return status != nfs_ok ? status : nfserr;
1da177e4
LT		 4699}
4700
695e12f8 4701static __be32
e78e274e
KC		 4702nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr,
4703 union nfsd4_op_u *u)
1da177e4 4704{
e78e274e 4705 struct nfsd4_setclientid *scd = &u->setclientid;
bddfdbcd 4706 struct xdr_stream *xdr = resp->xdr;
1da177e4
LT		 4707
4708 if (!nfserr) {
adaa7a50
CL		 4709 nfserr = nfsd4_encode_clientid4(xdr, &scd->se_clientid);
4710 if (nfserr != nfs_ok)
4711 goto out;
4712 nfserr = nfsd4_encode_verifier4(xdr, &scd->se_confirm);
4713 } else if (nfserr == nfserr_clid_inuse) {
4714 /* empty network id */
4715 if (xdr_stream_encode_u32(xdr, 0) < 0) {
4716 nfserr = nfserr_resource;
4717 goto out;
4718 }
4719 /* empty universal address */
4720 if (xdr_stream_encode_u32(xdr, 0) < 0) {
4721 nfserr = nfserr_resource;
4722 goto out;
4723 }
1da177e4 4724 }
adaa7a50 4725out:
695e12f8 4726 return nfserr;
1da177e4
LT		 4727}
4728
695e12f8 4729static __be32
e78e274e
KC		 4730nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr,
4731 union nfsd4_op_u *u)
1da177e4 4732{
e78e274e 4733 struct nfsd4_write *write = &u->write;
76bebcc7 4734 struct xdr_stream *xdr = resp->xdr;
1da177e4 4735
76bebcc7
CL		 4736 /* count */
4737 nfserr = nfsd4_encode_count4(xdr, write->wr_bytes_written);
4738 if (nfserr)
4739 return nfserr;
4740 /* committed */
4741 if (xdr_stream_encode_u32(xdr, write->wr_how_written) != XDR_UNIT)
adaa7a50 4742 return nfserr_resource;
76bebcc7
CL		 4743 /* writeverf */
4744 return nfsd4_encode_verifier4(xdr, &write->wr_verifier);
1da177e4
LT		 4745}
4746
2db134eb 4747static __be32
abef972c
CL		 4748nfsd4_encode_state_protect_ops4(struct xdr_stream *xdr,
4749 struct nfsd4_exchange_id *exid)
2db134eb 4750{
abef972c 4751 __be32 status;
0733d213 4752
abef972c
CL		 4753 /* spo_must_enforce */
4754 status = nfsd4_encode_bitmap4(xdr, exid->spo_must_enforce[0],
4755 exid->spo_must_enforce[1],
4756 exid->spo_must_enforce[2]);
4757 if (status != nfs_ok)
4758 return status;
4759 /* spo_must_allow */
4760 return nfsd4_encode_bitmap4(xdr, exid->spo_must_allow[0],
4761 exid->spo_must_allow[1],
4762 exid->spo_must_allow[2]);
4763}
0733d213 4764
abef972c
CL		 4765static __be32
4766nfsd4_encode_state_protect4_r(struct xdr_stream *xdr, struct nfsd4_exchange_id *exid)
4767{
4768 __be32 status;
0733d213 4769
abef972c 4770 if (xdr_stream_encode_u32(xdr, exid->spa_how) != XDR_UNIT)
adaa7a50 4771 return nfserr_resource;
57266a6e
BF		 4772 switch (exid->spa_how) {
4773 case SP4_NONE:
abef972c 4774 status = nfs_ok;
57266a6e
BF		 4775 break;
4776 case SP4_MACH_CRED:
abef972c
CL		 4777 /* spr_mach_ops */
4778 status = nfsd4_encode_state_protect_ops4(xdr, exid);
57266a6e
BF		 4779 break;
4780 default:
abef972c 4781 status = nfserr_serverfault;
57266a6e 4782 }
abef972c
CL		 4783 return status;
4784}
0733d213 4785
abef972c
CL		 4786static __be32
4787nfsd4_encode_server_owner4(struct xdr_stream *xdr, struct svc_rqst *rqstp)
4788{
4789 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4790 __be32 status;
a8bb84bc 4791
abef972c
CL		 4792 /* so_minor_id */
4793 status = nfsd4_encode_uint64_t(xdr, 0);
4794 if (status != nfs_ok)
4795 return status;
4796 /* so_major_id */
4797 return nfsd4_encode_opaque(xdr, nn->nfsd_name, strlen(nn->nfsd_name));
4798}
0733d213 4799
abef972c
CL		 4800static __be32
4801nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
4802 union nfsd4_op_u *u)
4803{
4804 struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id);
4805 struct nfsd4_exchange_id *exid = &u->exchange_id;
4806 struct xdr_stream *xdr = resp->xdr;
0733d213 4807
abef972c
CL		 4808 /* eir_clientid */
4809 nfserr = nfsd4_encode_clientid4(xdr, &exid->clientid);
4810 if (nfserr != nfs_ok)
4811 return nfserr;
4812 /* eir_sequenceid */
4813 nfserr = nfsd4_encode_sequenceid4(xdr, exid->seqid);
4814 if (nfserr != nfs_ok)
4815 return nfserr;
4816 /* eir_flags */
4817 nfserr = nfsd4_encode_uint32_t(xdr, exid->flags);
4818 if (nfserr != nfs_ok)
4819 return nfserr;
4820 /* eir_state_protect */
4821 nfserr = nfsd4_encode_state_protect4_r(xdr, exid);
4822 if (nfserr != nfs_ok)
4823 return nfserr;
4824 /* eir_server_owner */
4825 nfserr = nfsd4_encode_server_owner4(xdr, resp->rqstp);
4826 if (nfserr != nfs_ok)
4827 return nfserr;
4828 /* eir_server_scope */
4829 nfserr = nfsd4_encode_opaque(xdr, nn->nfsd_name,
4830 strlen(nn->nfsd_name));
4831 if (nfserr != nfs_ok)
4832 return nfserr;
4833 /* eir_server_impl_id<1> */
4834 if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT)
4835 return nfserr_resource;
4836
4837 return nfs_ok;
2db134eb
AA		 4838}
4839
150990f4
CL		 4840static __be32
4841nfsd4_encode_channel_attrs4(struct xdr_stream *xdr,
4842 const struct nfsd4_channel_attrs *attrs)
4843{
4844 __be32 status;
4845
4846 /* ca_headerpadsize */
4847 status = nfsd4_encode_count4(xdr, 0);
4848 if (status != nfs_ok)
4849 return status;
4850 /* ca_maxrequestsize */
4851 status = nfsd4_encode_count4(xdr, attrs->maxreq_sz);
4852 if (status != nfs_ok)
4853 return status;
4854 /* ca_maxresponsesize */
4855 status = nfsd4_encode_count4(xdr, attrs->maxresp_sz);
4856 if (status != nfs_ok)
4857 return status;
4858 /* ca_maxresponsesize_cached */
4859 status = nfsd4_encode_count4(xdr, attrs->maxresp_cached);
4860 if (status != nfs_ok)
4861 return status;
4862 /* ca_maxoperations */
4863 status = nfsd4_encode_count4(xdr, attrs->maxops);
4864 if (status != nfs_ok)
4865 return status;
4866 /* ca_maxrequests */
4867 status = nfsd4_encode_count4(xdr, attrs->maxreqs);
4868 if (status != nfs_ok)
4869 return status;
4870 /* ca_rdma_ird<1> */
4871 if (xdr_stream_encode_u32(xdr, attrs->nr_rdma_attrs) != XDR_UNIT)
4872 return nfserr_resource;
4873 if (attrs->nr_rdma_attrs)
4874 return nfsd4_encode_uint32_t(xdr, attrs->rdma_attrs);
4875 return nfs_ok;
4876}
4877
2db134eb 4878static __be32
57b7b43b 4879nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
e78e274e 4880 union nfsd4_op_u *u)
2db134eb 4881{
e78e274e 4882 struct nfsd4_create_session *sess = &u->create_session;
bddfdbcd 4883 struct xdr_stream *xdr = resp->xdr;
ec6b5d7b 4884
b0c1b1ba
CL		 4885 /* csr_sessionid */
4886 nfserr = nfsd4_encode_sessionid4(xdr, &sess->sessionid);
4887 if (nfserr != nfs_ok)
4888 return nfserr;
4889 /* csr_sequence */
4890 nfserr = nfsd4_encode_sequenceid4(xdr, sess->seqid);
4891 if (nfserr != nfs_ok)
4892 return nfserr;
4893 /* csr_flags */
4894 nfserr = nfsd4_encode_uint32_t(xdr, sess->flags);
4895 if (nfserr != nfs_ok)
4896 return nfserr;
150990f4
CL		 4897 /* csr_fore_chan_attrs */
4898 nfserr = nfsd4_encode_channel_attrs4(xdr, &sess->fore_channel);
4899 if (nfserr != nfs_ok)
4900 return nfserr;
4901 /* csr_back_chan_attrs */
4902 return nfsd4_encode_channel_attrs4(xdr, &sess->back_channel);
2db134eb
AA		 4903}
4904
c47d832b 4905static __be32
57b7b43b 4906nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
e78e274e 4907 union nfsd4_op_u *u)
2db134eb 4908{
e78e274e 4909 struct nfsd4_sequence *seq = &u->sequence;
bddfdbcd 4910 struct xdr_stream *xdr = resp->xdr;
b85d4c01 4911
6621b88b
CL		 4912 /* sr_sessionid */
4913 nfserr = nfsd4_encode_sessionid4(xdr, &seq->sessionid);
4914 if (nfserr != nfs_ok)
4915 return nfserr;
4916 /* sr_sequenceid */
4917 nfserr = nfsd4_encode_sequenceid4(xdr, seq->seqid);
4918 if (nfserr != nfs_ok)
4919 return nfserr;
4920 /* sr_slotid */
4921 nfserr = nfsd4_encode_slotid4(xdr, seq->slotid);
4922 if (nfserr != nfs_ok)
4923 return nfserr;
b7d7ca35 4924 /* Note slotid's are numbered from zero: */
6621b88b
CL		 4925 /* sr_highest_slotid */
4926 nfserr = nfsd4_encode_slotid4(xdr, seq->maxslots - 1);
4927 if (nfserr != nfs_ok)
4928 return nfserr;
4929 /* sr_target_highest_slotid */
4930 nfserr = nfsd4_encode_slotid4(xdr, seq->maxslots - 1);
4931 if (nfserr != nfs_ok)
4932 return nfserr;
4933 /* sr_status_flags */
4934 nfserr = nfsd4_encode_uint32_t(xdr, seq->status_flags);
4935 if (nfserr != nfs_ok)
4936 return nfserr;
b85d4c01 4937
f5236013 4938 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
6621b88b 4939 return nfs_ok;
2db134eb
AA		 4940}
4941
2355c596 4942static __be32
57b7b43b 4943nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
e78e274e 4944 union nfsd4_op_u *u)
17456804 4945{
e78e274e 4946 struct nfsd4_test_stateid *test_stateid = &u->test_stateid;
03cfb420 4947 struct nfsd4_test_stateid_id *stateid, *next;
08b4436a 4948 struct xdr_stream *xdr = resp->xdr;
17456804 4949
08b4436a
CL		 4950 /* tsr_status_codes<> */
4951 if (xdr_stream_encode_u32(xdr, test_stateid->ts_num_ids) != XDR_UNIT)
d0a381dd 4952 return nfserr_resource;
08b4436a
CL		 4953 list_for_each_entry_safe(stateid, next,
4954 &test_stateid->ts_stateid_list, ts_id_list) {
4955 if (xdr_stream_encode_be32(xdr, stateid->ts_id_status) != XDR_UNIT)
4956 return nfserr_resource;
17456804 4957 }
08b4436a 4958 return nfs_ok;
17456804
BS		 4959}
4960
9cf514cc
CH		 4961#ifdef CONFIG_NFSD_PNFS
4962static __be32
4bbe42e8
CL		 4963nfsd4_encode_device_addr4(struct xdr_stream *xdr,
4964 const struct nfsd4_getdeviceinfo *gdev)
9cf514cc 4965{
4bbe42e8 4966 u32 needed_len, starting_len = xdr->buf->len;
f961e3f2 4967 const struct nfsd4_layout_ops *ops;
4bbe42e8 4968 __be32 status;
9cf514cc 4969
4bbe42e8
CL		 4970 /* da_layout_type */
4971 if (xdr_stream_encode_u32(xdr, gdev->gd_layout_type) != XDR_UNIT)
bac966d6 4972 return nfserr_resource;
4bbe42e8 4973 /* da_addr_body */
6372e2ee 4974 ops = nfsd4_layout_ops[gdev->gd_layout_type];
4bbe42e8
CL		 4975 status = ops->encode_getdeviceinfo(xdr, gdev);
4976 if (status != nfs_ok) {
6372e2ee 4977 /*
4bbe42e8
CL		 4978 * Don't burden the layout drivers with enforcing
4979 * gd_maxcount. Just tell the client to come back
4980 * with a bigger buffer if it's not enough.
6372e2ee 4981 */
4bbe42e8 4982 if (xdr->buf->len + XDR_UNIT > gdev->gd_maxcount)
6372e2ee 4983 goto toosmall;
4bbe42e8 4984 return status;
9cf514cc
CH		 4985 }
4986
4bbe42e8 4987 return nfs_ok;
9cf514cc 4988
9cf514cc 4989toosmall:
4bbe42e8 4990 needed_len = xdr->buf->len + XDR_UNIT; /* notifications */
9cf514cc 4991 xdr_truncate_encode(xdr, starting_len);
4bbe42e8
CL		 4992
4993 status = nfsd4_encode_count4(xdr, needed_len);
4994 if (status != nfs_ok)
4995 return status;
bac966d6 4996 return nfserr_toosmall;
9cf514cc
CH		 4997}
4998
4bbe42e8
CL		 4999static __be32
5000nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
5001 union nfsd4_op_u *u)
5002{
5003 struct nfsd4_getdeviceinfo *gdev = &u->getdeviceinfo;
5004 struct xdr_stream *xdr = resp->xdr;
5005
5006 /* gdir_device_addr */
5007 nfserr = nfsd4_encode_device_addr4(xdr, gdev);
5008 if (nfserr)
5009 return nfserr;
5010 /* gdir_notification */
5011 return nfsd4_encode_bitmap4(xdr, gdev->gd_notify_types, 0, 0);
5012}
5013
69f5f019
CL		 5014static __be32
5015nfsd4_encode_layout4(struct xdr_stream *xdr, const struct nfsd4_layoutget *lgp)
5016{
5017 const struct nfsd4_layout_ops *ops = nfsd4_layout_ops[lgp->lg_layout_type];
5018 __be32 status;
5019
5020 /* lo_offset */
5021 status = nfsd4_encode_offset4(xdr, lgp->lg_seg.offset);
5022 if (status != nfs_ok)
5023 return status;
5024 /* lo_length */
5025 status = nfsd4_encode_length4(xdr, lgp->lg_seg.length);
5026 if (status != nfs_ok)
5027 return status;
5028 /* lo_iomode */
5029 if (xdr_stream_encode_u32(xdr, lgp->lg_seg.iomode) != XDR_UNIT)
5030 return nfserr_resource;
5031 /* lo_content */
5032 if (xdr_stream_encode_u32(xdr, lgp->lg_layout_type) != XDR_UNIT)
5033 return nfserr_resource;
5034 return ops->encode_layoutget(xdr, lgp);
5035}
5036
9cf514cc
CH		 5037static __be32
5038nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
e78e274e 5039 union nfsd4_op_u *u)
9cf514cc 5040{
e78e274e 5041 struct nfsd4_layoutget *lgp = &u->layoutget;
bddfdbcd 5042 struct xdr_stream *xdr = resp->xdr;
9cf514cc 5043
69f5f019
CL		 5044 /* logr_return_on_close */
5045 nfserr = nfsd4_encode_bool(xdr, true);
5046 if (nfserr != nfs_ok)
5047 return nfserr;
5048 /* logr_stateid */
5049 nfserr = nfsd4_encode_stateid4(xdr, &lgp->lg_sid);
5050 if (nfserr != nfs_ok)
5051 return nfserr;
5052 /* logr_layout<> */
5053 if (xdr_stream_encode_u32(xdr, 1) != XDR_UNIT)
bac966d6 5054 return nfserr_resource;
69f5f019 5055 return nfsd4_encode_layout4(xdr, lgp);
9cf514cc
CH		 5056}
5057
5058static __be32
5059nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
e78e274e 5060 union nfsd4_op_u *u)
9cf514cc 5061{
e78e274e 5062 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
bddfdbcd 5063 struct xdr_stream *xdr = resp->xdr;
9cf514cc 5064
cc313f80
CL		 5065 /* ns_sizechanged */
5066 nfserr = nfsd4_encode_bool(xdr, lcp->lc_size_chg);
5067 if (nfserr != nfs_ok)
5068 return nfserr;
5069 if (lcp->lc_size_chg)
5070 /* ns_size */
5071 return nfsd4_encode_length4(xdr, lcp->lc_newsize);
5072 return nfs_ok;
9cf514cc
CH		 5073}
5074
5075static __be32
5076nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
e78e274e 5077 union nfsd4_op_u *u)
9cf514cc 5078{
e78e274e 5079 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
bddfdbcd 5080 struct xdr_stream *xdr = resp->xdr;
9cf514cc 5081
85dbc978
CL		 5082 /* lrs_present */
5083 nfserr = nfsd4_encode_bool(xdr, lrp->lrs_present);
5084 if (nfserr != nfs_ok)
5085 return nfserr;
9cf514cc 5086 if (lrp->lrs_present)
85dbc978 5087 /* lrs_stateid */
40bb2baa 5088 return nfsd4_encode_stateid4(xdr, &lrp->lr_sid);
85dbc978 5089 return nfs_ok;
9cf514cc
CH		 5090}
5091#endif /* CONFIG_NFSD_PNFS */
5092
29ae7f9d 5093static __be32
02e0297f
CL		 5094nfsd4_encode_write_response4(struct xdr_stream *xdr,
5095 const struct nfsd4_copy *copy)
29ae7f9d 5096{
02e0297f
CL		 5097 const struct nfsd42_write_res *write = &copy->cp_res;
5098 u32 count = nfsd4_copy_is_sync(copy) ? 0 : 1;
5099 __be32 status;
29ae7f9d 5100
02e0297f
CL		 5101 /* wr_callback_id<1> */
5102 if (xdr_stream_encode_u32(xdr, count) != XDR_UNIT)
5103 return nfserr_resource;
5104 if (count) {
5105 status = nfsd4_encode_stateid4(xdr, &write->cb_stateid);
5106 if (status != nfs_ok)
5107 return status;
e0639dc5 5108 }
02e0297f
CL		 5109
5110 /* wr_count */
5111 status = nfsd4_encode_length4(xdr, write->wr_bytes_written);
5112 if (status != nfs_ok)
5113 return status;
5114 /* wr_committed */
5115 if (xdr_stream_encode_u32(xdr, write->wr_stable_how) != XDR_UNIT)
29ae7f9d 5116 return nfserr_resource;
02e0297f
CL		 5117 /* wr_writeverf */
5118 return nfsd4_encode_verifier4(xdr, &write->wr_verifier);
5119}
29ae7f9d 5120
02e0297f
CL		 5121static __be32 nfsd4_encode_copy_requirements4(struct xdr_stream *xdr,
5122 const struct nfsd4_copy *copy)
5123{
5124 __be32 status;
5125
5126 /* cr_consecutive */
5127 status = nfsd4_encode_bool(xdr, true);
5128 if (status != nfs_ok)
5129 return status;
5130 /* cr_synchronous */
5131 return nfsd4_encode_bool(xdr, nfsd4_copy_is_sync(copy));
5132}
5133
5134static __be32
5135nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
5136 union nfsd4_op_u *u)
5137{
5138 struct nfsd4_copy *copy = &u->copy;
5139
5140 nfserr = nfsd4_encode_write_response4(resp->xdr, copy);
5141 if (nfserr != nfs_ok)
5142 return nfserr;
5143 return nfsd4_encode_copy_requirements4(resp->xdr, copy);
29ae7f9d
AS		 5144}
5145
51911868 5146static __be32
21d316a7 5147nfsd4_encode_netloc4(struct xdr_stream *xdr, const struct nl4_server *ns)
51911868 5148{
21d316a7 5149 __be32 status;
51911868 5150
21d316a7
CL		 5151 if (xdr_stream_encode_u32(xdr, ns->nl4_type) != XDR_UNIT)
5152 return nfserr_resource;
51911868
OK		 5153 switch (ns->nl4_type) {
5154 case NL4_NETADDR:
21d316a7
CL		 5155 /* nl_addr */
5156 status = nfsd4_encode_netaddr4(xdr, &ns->u.nl4_addr);
51911868
OK		 5157 break;
5158 default:
21d316a7 5159 status = nfserr_serverfault;
51911868 5160 }
21d316a7
CL		 5161 return status;
5162}
51911868 5163
21d316a7
CL		 5164static __be32
5165nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr,
5166 union nfsd4_op_u *u)
5167{
5168 struct nfsd4_copy_notify *cn = &u->copy_notify;
5169 struct xdr_stream *xdr = resp->xdr;
5170
5171 /* cnr_lease_time */
5172 nfserr = nfsd4_encode_nfstime4(xdr, &cn->cpn_lease_time);
5173 if (nfserr)
5174 return nfserr;
5175 /* cnr_stateid */
5176 nfserr = nfsd4_encode_stateid4(xdr, &cn->cpn_cnr_stateid);
5177 if (nfserr)
5178 return nfserr;
5179 /* cnr_source_server<> */
5180 if (xdr_stream_encode_u32(xdr, 1) != XDR_UNIT)
5181 return nfserr_resource;
5182 return nfsd4_encode_netloc4(xdr, cn->cpn_src);
51911868
OK		 5183}
5184
6308bc98
OK		 5185static __be32
5186nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
e78e274e 5187 union nfsd4_op_u *u)
6308bc98 5188{
e78e274e 5189 struct nfsd4_offload_status *os = &u->offload_status;
bddfdbcd 5190 struct xdr_stream *xdr = resp->xdr;
6308bc98 5191
b609ad60
CL		 5192 /* osr_count */
5193 nfserr = nfsd4_encode_length4(xdr, os->count);
5194 if (nfserr != nfs_ok)
5195 return nfserr;
5196 /* osr_complete<1> */
5197 if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT)
6308bc98 5198 return nfserr_resource;
b609ad60 5199 return nfs_ok;
528b8493
AS		 5200}
5201
5202static __be32
5203nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp,
eeadcb75 5204 struct nfsd4_read *read)
528b8493 5205{
a2c91753 5206 struct nfsd4_compoundargs *argp = resp->rqstp->rq_argp;
528b8493 5207 struct file *file = read->rd_nf->nf_file;
eeadcb75 5208 struct xdr_stream *xdr = resp->xdr;
a2c91753 5209 bool splice_ok = argp->splice_ok;
eeadcb75
AS		 5210 unsigned long maxcount;
5211 __be32 nfserr, *p;
528b8493
AS		 5212
5213 /* Content type, offset, byte count */
5214 p = xdr_reserve_space(xdr, 4 + 8 + 4);
5215 if (!p)
eeadcb75
AS		 5216 return nfserr_io;
5217 if (resp->xdr->buf->page_len && splice_ok) {
5218 WARN_ON_ONCE(splice_ok);
5219 return nfserr_serverfault;
5220 }
528b8493 5221
eeadcb75
AS		 5222 maxcount = min_t(unsigned long, read->rd_length,
5223 (xdr->buf->buflen - xdr->buf->len));
528b8493 5224
eeadcb75
AS		 5225 if (file->f_op->splice_read && splice_ok)
5226 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
5227 else
5228 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
528b8493
AS		 5229 if (nfserr)
5230 return nfserr;
278765ea 5231
eeadcb75 5232 *p++ = cpu_to_be32(NFS4_CONTENT_DATA);
1e37d0e5 5233 p = xdr_encode_hyper(p, read->rd_offset);
eeadcb75 5234 *p = cpu_to_be32(read->rd_length);
2db27992 5235
2db27992
AS		 5236 return nfs_ok;
5237}
5238
528b8493
AS		 5239static __be32
5240nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr,
e78e274e 5241 union nfsd4_op_u *u)
528b8493 5242{
e78e274e 5243 struct nfsd4_read *read = &u->read;
eeadcb75 5244 struct file *file = read->rd_nf->nf_file;
bddfdbcd 5245 struct xdr_stream *xdr = resp->xdr;
528b8493 5246 int starting_len = xdr->buf->len;
eeadcb75
AS		 5247 u32 segments = 0;
5248 __be32 *p;
528b8493
AS		 5249
5250 if (nfserr)
5251 return nfserr;
528b8493
AS		 5252
5253 /* eof flag, segment count */
5254 p = xdr_reserve_space(xdr, 4 + 4);
5255 if (!p)
eeadcb75 5256 return nfserr_io;
528b8493
AS		 5257 xdr_commit_encode(xdr);
5258
eeadcb75
AS		 5259 read->rd_eof = read->rd_offset >= i_size_read(file_inode(file));
5260 if (read->rd_eof)
2db27992
AS		 5261 goto out;
5262
eeadcb75
AS		 5263 nfserr = nfsd4_encode_read_plus_data(resp, read);
5264 if (nfserr) {
528b8493 5265 xdr_truncate_encode(xdr, starting_len);
eeadcb75 5266 return nfserr;
528b8493 5267 }
6308bc98 5268
eeadcb75
AS		 5269 segments++;
5270
5271out:
5272 p = xdr_encode_bool(p, read->rd_eof);
5273 *p = cpu_to_be32(segments);
6308bc98
OK		 5274 return nfserr;
5275}
5276
24bab491
AS		 5277static __be32
5278nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
e78e274e 5279 union nfsd4_op_u *u)
24bab491 5280{
e78e274e 5281 struct nfsd4_seek *seek = &u->seek;
1f121e2d 5282 struct xdr_stream *xdr = resp->xdr;
24bab491 5283
1f121e2d
CL		 5284 /* sr_eof */
5285 nfserr = nfsd4_encode_bool(xdr, seek->seek_eof);
5286 if (nfserr != nfs_ok)
5287 return nfserr;
5288 /* sr_offset */
5289 return nfsd4_encode_offset4(xdr, seek->seek_pos);
24bab491
AS		 5290}
5291
695e12f8 5292static __be32
e78e274e
KC		 5293nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr,
5294 union nfsd4_op_u *p)
695e12f8
BH		 5295{
5296 return nfserr;
5297}
5298
23e50fe3
FL		 5299/*
5300 * Encode kmalloc-ed buffer in to XDR stream.
5301 */
b9a49237 5302static __be32
23e50fe3
FL		 5303nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen)
5304{
5305 u32 cplen;
5306 __be32 *p;
5307
5308 cplen = min_t(unsigned long, buflen,
5309 ((void *)xdr->end - (void *)xdr->p));
5310 p = xdr_reserve_space(xdr, cplen);
5311 if (!p)
5312 return nfserr_resource;
5313
5314 memcpy(p, buf, cplen);
5315 buf += cplen;
5316 buflen -= cplen;
5317
5318 while (buflen) {
5319 cplen = min_t(u32, buflen, PAGE_SIZE);
5320 p = xdr_reserve_space(xdr, cplen);
5321 if (!p)
5322 return nfserr_resource;
5323
5324 memcpy(p, buf, cplen);
5325
5326 if (cplen < PAGE_SIZE) {
5327 /*
5328 * We're done, with a length that wasn't page
5329 * aligned, so possibly not word aligned. Pad
5330 * any trailing bytes with 0.
5331 */
5332 xdr_encode_opaque_fixed(p, NULL, cplen);
5333 break;
5334 }
5335
5336 buflen -= PAGE_SIZE;
5337 buf += PAGE_SIZE;
5338 }
5339
5340 return 0;
5341}
5342
5343static __be32
5344nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
e78e274e 5345 union nfsd4_op_u *u)
23e50fe3 5346{
e78e274e 5347 struct nfsd4_getxattr *getxattr = &u->getxattr;
bddfdbcd 5348 struct xdr_stream *xdr = resp->xdr;
23e50fe3
FL		 5349 __be32 *p, err;
5350
5351 p = xdr_reserve_space(xdr, 4);
5352 if (!p)
5353 return nfserr_resource;
5354
5355 *p = cpu_to_be32(getxattr->getxa_len);
5356
5357 if (getxattr->getxa_len == 0)
5358 return 0;
5359
5360 err = nfsd4_vbuf_to_stream(xdr, getxattr->getxa_buf,
5361 getxattr->getxa_len);
5362
5363 kvfree(getxattr->getxa_buf);
5364
5365 return err;
5366}
5367
5368static __be32
5369nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
e78e274e 5370 union nfsd4_op_u *u)
23e50fe3 5371{
e78e274e 5372 struct nfsd4_setxattr *setxattr = &u->setxattr;
bddfdbcd 5373 struct xdr_stream *xdr = resp->xdr;
23e50fe3 5374
66a21db7 5375 return nfsd4_encode_change_info4(xdr, &setxattr->setxa_cinfo);
23e50fe3
FL		 5376}
5377
5378/*
5379 * See if there are cookie values that can be rejected outright.
5380 */
5381static __be32
5382nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs,
5383 u32 *offsetp)
5384{
5385 u64 cookie = listxattrs->lsxa_cookie;
5386
5387 /*
5388 * If the cookie is larger than the maximum number we can fit
5389 * in either the buffer we just got back from vfs_listxattr, or,
5390 * XDR-encoded, in the return buffer, it's invalid.
5391 */
5392 if (cookie > (listxattrs->lsxa_len) / (XATTR_USER_PREFIX_LEN + 2))
5393 return nfserr_badcookie;
5394
5395 if (cookie > (listxattrs->lsxa_maxcount /
5396 (XDR_QUADLEN(XATTR_USER_PREFIX_LEN + 2) + 4)))
5397 return nfserr_badcookie;
5398
5399 *offsetp = (u32)cookie;
5400 return 0;
5401}
5402
5403static __be32
5404nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
e78e274e 5405 union nfsd4_op_u *u)
23e50fe3 5406{
e78e274e 5407 struct nfsd4_listxattrs *listxattrs = &u->listxattrs;
bddfdbcd 5408 struct xdr_stream *xdr = resp->xdr;
23e50fe3
FL		 5409 u32 cookie_offset, count_offset, eof;
5410 u32 left, xdrleft, slen, count;
5411 u32 xdrlen, offset;
5412 u64 cookie;
5413 char *sp;
b9a49237 5414 __be32 status, tmp;
23e50fe3
FL		 5415 __be32 *p;
5416 u32 nuser;
5417
5418 eof = 1;
5419
5420 status = nfsd4_listxattr_validate_cookie(listxattrs, &offset);
5421 if (status)
5422 goto out;
5423
5424 /*
5425 * Reserve space for the cookie and the name array count. Record
5426 * the offsets to save them later.
5427 */
5428 cookie_offset = xdr->buf->len;
5429 count_offset = cookie_offset + 8;
5430 p = xdr_reserve_space(xdr, 12);
5431 if (!p) {
5432 status = nfserr_resource;
5433 goto out;
5434 }
5435
5436 count = 0;
5437 left = listxattrs->lsxa_len;
5438 sp = listxattrs->lsxa_buf;
5439 nuser = 0;
5440
5441 xdrleft = listxattrs->lsxa_maxcount;
5442
5443 while (left > 0 && xdrleft > 0) {
5444 slen = strlen(sp);
5445
5446 /*
4cce11fa 5447 * Check if this is a "user." attribute, skip it if not.
23e50fe3
FL		 5448 */
5449 if (strncmp(sp, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
5450 goto contloop;
5451
5452 slen -= XATTR_USER_PREFIX_LEN;
5453 xdrlen = 4 + ((slen + 3) & ~3);
5454 if (xdrlen > xdrleft) {
5455 if (count == 0) {
5456 /*
5457 * Can't even fit the first attribute name.
5458 */
5459 status = nfserr_toosmall;
5460 goto out;
5461 }
5462 eof = 0;
5463 goto wreof;
5464 }
5465
5466 left -= XATTR_USER_PREFIX_LEN;
5467 sp += XATTR_USER_PREFIX_LEN;
5468 if (nuser++ < offset)
5469 goto contloop;
5470
5471
5472 p = xdr_reserve_space(xdr, xdrlen);
5473 if (!p) {
5474 status = nfserr_resource;
5475 goto out;
5476 }
5477
e2a1840e 5478 xdr_encode_opaque(p, sp, slen);
23e50fe3
FL		 5479
5480 xdrleft -= xdrlen;
5481 count++;
5482contloop:
5483 sp += slen + 1;
5484 left -= slen + 1;
5485 }
5486
5487 /*
5488 * If there were user attributes to copy, but we didn't copy
5489 * any, the offset was too large (e.g. the cookie was invalid).
5490 */
5491 if (nuser > 0 && count == 0) {
5492 status = nfserr_badcookie;
5493 goto out;
5494 }
5495
5496wreof:
5497 p = xdr_reserve_space(xdr, 4);
5498 if (!p) {
5499 status = nfserr_resource;
5500 goto out;
5501 }
5502 *p = cpu_to_be32(eof);
5503
5504 cookie = offset + count;
5505
5506 write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &cookie, 8);
b9a49237
CL		 5507 tmp = cpu_to_be32(count);
5508 write_bytes_to_xdr_buf(xdr->buf, count_offset, &tmp, 4);
23e50fe3
FL		 5509out:
5510 if (listxattrs->lsxa_len)
5511 kvfree(listxattrs->lsxa_buf);
5512 return status;
5513}
5514
5515static __be32
5516nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr,
e78e274e 5517 union nfsd4_op_u *u)
23e50fe3 5518{
e78e274e 5519 struct nfsd4_removexattr *removexattr = &u->removexattr;
bddfdbcd 5520 struct xdr_stream *xdr = resp->xdr;
23e50fe3 5521
66a21db7 5522 return nfsd4_encode_change_info4(xdr, &removexattr->rmxa_cinfo);
23e50fe3
FL		 5523}
5524
e78e274e 5525typedef __be32(*nfsd4_enc)(struct nfsd4_compoundres *, __be32, union nfsd4_op_u *u);
695e12f8 5526
2db134eb
AA		 5527/*
5528 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
5529 * since we don't need to filter out obsolete ops as this is
5530 * done in the decoding phase.
5531 */
c1df609d 5532static const nfsd4_enc nfsd4_enc_ops[] = {
e78e274e
KC		 5533 [OP_ACCESS] = nfsd4_encode_access,
5534 [OP_CLOSE] = nfsd4_encode_close,
5535 [OP_COMMIT] = nfsd4_encode_commit,
5536 [OP_CREATE] = nfsd4_encode_create,
5537 [OP_DELEGPURGE] = nfsd4_encode_noop,
5538 [OP_DELEGRETURN] = nfsd4_encode_noop,
5539 [OP_GETATTR] = nfsd4_encode_getattr,
5540 [OP_GETFH] = nfsd4_encode_getfh,
5541 [OP_LINK] = nfsd4_encode_link,
5542 [OP_LOCK] = nfsd4_encode_lock,
5543 [OP_LOCKT] = nfsd4_encode_lockt,
5544 [OP_LOCKU] = nfsd4_encode_locku,
5545 [OP_LOOKUP] = nfsd4_encode_noop,
5546 [OP_LOOKUPP] = nfsd4_encode_noop,
5547 [OP_NVERIFY] = nfsd4_encode_noop,
5548 [OP_OPEN] = nfsd4_encode_open,
5549 [OP_OPENATTR] = nfsd4_encode_noop,
5550 [OP_OPEN_CONFIRM] = nfsd4_encode_open_confirm,
5551 [OP_OPEN_DOWNGRADE] = nfsd4_encode_open_downgrade,
5552 [OP_PUTFH] = nfsd4_encode_noop,
5553 [OP_PUTPUBFH] = nfsd4_encode_noop,
5554 [OP_PUTROOTFH] = nfsd4_encode_noop,
5555 [OP_READ] = nfsd4_encode_read,
5556 [OP_READDIR] = nfsd4_encode_readdir,
5557 [OP_READLINK] = nfsd4_encode_readlink,
5558 [OP_REMOVE] = nfsd4_encode_remove,
5559 [OP_RENAME] = nfsd4_encode_rename,
5560 [OP_RENEW] = nfsd4_encode_noop,
5561 [OP_RESTOREFH] = nfsd4_encode_noop,
5562 [OP_SAVEFH] = nfsd4_encode_noop,
5563 [OP_SECINFO] = nfsd4_encode_secinfo,
5564 [OP_SETATTR] = nfsd4_encode_setattr,
5565 [OP_SETCLIENTID] = nfsd4_encode_setclientid,
5566 [OP_SETCLIENTID_CONFIRM] = nfsd4_encode_noop,
5567 [OP_VERIFY] = nfsd4_encode_noop,
5568 [OP_WRITE] = nfsd4_encode_write,
5569 [OP_RELEASE_LOCKOWNER] = nfsd4_encode_noop,
2db134eb
AA		 5570
5571 /* NFSv4.1 operations */
e78e274e
KC		 5572 [OP_BACKCHANNEL_CTL] = nfsd4_encode_noop,
5573 [OP_BIND_CONN_TO_SESSION] = nfsd4_encode_bind_conn_to_session,
5574 [OP_EXCHANGE_ID] = nfsd4_encode_exchange_id,
5575 [OP_CREATE_SESSION] = nfsd4_encode_create_session,
5576 [OP_DESTROY_SESSION] = nfsd4_encode_noop,
5577 [OP_FREE_STATEID] = nfsd4_encode_noop,
5578 [OP_GET_DIR_DELEGATION] = nfsd4_encode_noop,
9cf514cc 5579#ifdef CONFIG_NFSD_PNFS
e78e274e
KC		 5580 [OP_GETDEVICEINFO] = nfsd4_encode_getdeviceinfo,
5581 [OP_GETDEVICELIST] = nfsd4_encode_noop,
5582 [OP_LAYOUTCOMMIT] = nfsd4_encode_layoutcommit,
5583 [OP_LAYOUTGET] = nfsd4_encode_layoutget,
5584 [OP_LAYOUTRETURN] = nfsd4_encode_layoutreturn,
9cf514cc 5585#else
e78e274e
KC		 5586 [OP_GETDEVICEINFO] = nfsd4_encode_noop,
5587 [OP_GETDEVICELIST] = nfsd4_encode_noop,
5588 [OP_LAYOUTCOMMIT] = nfsd4_encode_noop,
5589 [OP_LAYOUTGET] = nfsd4_encode_noop,
5590 [OP_LAYOUTRETURN] = nfsd4_encode_noop,
9cf514cc 5591#endif
e78e274e
KC		 5592 [OP_SECINFO_NO_NAME] = nfsd4_encode_secinfo_no_name,
5593 [OP_SEQUENCE] = nfsd4_encode_sequence,
5594 [OP_SET_SSV] = nfsd4_encode_noop,
5595 [OP_TEST_STATEID] = nfsd4_encode_test_stateid,
5596 [OP_WANT_DELEGATION] = nfsd4_encode_noop,
5597 [OP_DESTROY_CLIENTID] = nfsd4_encode_noop,
5598 [OP_RECLAIM_COMPLETE] = nfsd4_encode_noop,
87a15a80
AS		 5599
5600 /* NFSv4.2 operations */
e78e274e
KC		 5601 [OP_ALLOCATE] = nfsd4_encode_noop,
5602 [OP_COPY] = nfsd4_encode_copy,
5603 [OP_COPY_NOTIFY] = nfsd4_encode_copy_notify,
5604 [OP_DEALLOCATE] = nfsd4_encode_noop,
5605 [OP_IO_ADVISE] = nfsd4_encode_noop,
5606 [OP_LAYOUTERROR] = nfsd4_encode_noop,
5607 [OP_LAYOUTSTATS] = nfsd4_encode_noop,
5608 [OP_OFFLOAD_CANCEL] = nfsd4_encode_noop,
5609 [OP_OFFLOAD_STATUS] = nfsd4_encode_offload_status,
5610 [OP_READ_PLUS] = nfsd4_encode_read_plus,
5611 [OP_SEEK] = nfsd4_encode_seek,
5612 [OP_WRITE_SAME] = nfsd4_encode_noop,
5613 [OP_CLONE] = nfsd4_encode_noop,
23e50fe3
FL		 5614
5615 /* RFC 8276 extended atributes operations */
e78e274e
KC		 5616 [OP_GETXATTR] = nfsd4_encode_getxattr,
5617 [OP_SETXATTR] = nfsd4_encode_setxattr,
5618 [OP_LISTXATTRS] = nfsd4_encode_listxattrs,
5619 [OP_REMOVEXATTR] = nfsd4_encode_removexattr,
695e12f8
BH		 5620};
5621
496c262c 5622/*
a8095f7e
BF		 5623 * Calculate whether we still have space to encode repsize bytes.
5624 * There are two considerations:
5625 * - For NFS versions >=4.1, the size of the reply must stay within
5626 * session limits
5627 * - For all NFS versions, we must stay within limited preallocated
5628 * buffer space.
496c262c 5629 *
a8095f7e
BF		 5630 * This is called before the operation is processed, so can only provide
5631 * an upper estimate. For some nonidempotent operations (such as
5632 * getattr), it's not necessarily a problem if that estimate is wrong,
5633 * as we can fail it after processing without significant side effects.
496c262c 5634 */
a8095f7e 5635__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 5636{
67492c99 5637 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 5638 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 5639
47ee5298
BF		 5640 if (buf->len + respsize <= buf->buflen)
5641 return nfs_ok;
5642 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 5643 return nfserr_resource;
47ee5298
BF		 5644 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
5645 WARN_ON_ONCE(1);
5646 return nfserr_rep_too_big_to_cache;
ea8d7720 5647 }
47ee5298 5648 return nfserr_rep_too_big;
496c262c
AA		 5649}
5650
1da177e4
LT		 5651void
5652nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
5653{
bddfdbcd 5654 struct xdr_stream *xdr = resp->xdr;
9411b1d4 5655 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 5656 struct svc_rqst *rqstp = resp->rqstp;
34b1744c 5657 const struct nfsd4_operation *opdesc = op->opdesc;
082d4bd7 5658 int post_err_offset;
07d1f802 5659 nfsd4_enc encoder;
bc749ca4 5660 __be32 *p;
1da177e4 5661
d0a381dd 5662 p = xdr_reserve_space(xdr, 8);
15a8b55d
JL		 5663 if (!p)
5664 goto release;
c373b0a4 5665 *p++ = cpu_to_be32(op->opnum);
082d4bd7 5666 post_err_offset = xdr->buf->len;
1da177e4 5667
695e12f8
BH		 5668 if (op->opnum == OP_ILLEGAL)
5669 goto status;
b7571e4c
BF		 5670 if (op->status && opdesc &&
5671 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
5672 goto status;
3a237b4a 5673 BUG_ON(op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
695e12f8 5674 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 5675 encoder = nfsd4_enc_ops[op->opnum];
5676 op->status = encoder(resp, op->status, &op->u);
08281341
CL		 5677 if (op->status)
5678 trace_nfsd_compound_encode_err(rqstp, op->opnum, op->status);
2825a7f9
BF		 5679 xdr_commit_encode(xdr);
5680
067e1ace 5681 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 5682 if (!op->status) {
5683 int space_needed = 0;
5684 if (!nfsd4_last_compound_op(rqstp))
5685 space_needed = COMPOUND_ERR_SLACK_SPACE;
5686 op->status = nfsd4_check_resp_size(resp, space_needed);
5687 }
c8f13d97
BF		 5688 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
5689 struct nfsd4_slot *slot = resp->cstate.slot;
5690
5691 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
5692 op->status = nfserr_rep_too_big_to_cache;
5693 else
5694 op->status = nfserr_rep_too_big;
5695 }
07d1f802
BF		 5696 if (op->status == nfserr_resource ||
5697 op->status == nfserr_rep_too_big ||
5698 op->status == nfserr_rep_too_big_to_cache) {
5699 /*
5700 * The operation may have already been encoded or
5701 * partially encoded. No op returns anything additional
5702 * in the case of one of these three errors, so we can
5703 * just truncate back to after the status. But it's a
5704 * bug if we had to do this on a non-idempotent op:
5705 */
5706 warn_on_nonidempotent_op(op);
082d4bd7 5707 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 5708 }
9411b1d4 5709 if (so) {
082d4bd7
BF		 5710 int len = xdr->buf->len - post_err_offset;
5711
9411b1d4 5712 so->so_replay.rp_status = op->status;
082d4bd7
BF		 5713 so->so_replay.rp_buflen = len;
5714 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
5715 so->so_replay.rp_buf, len);
9411b1d4 5716 }
695e12f8 5717status:
095a764b 5718 *p = op->status;
15a8b55d
JL		 5719release:
5720 if (opdesc && opdesc->op_release)
5721 opdesc->op_release(&op->u);
ed4a567a
CL		 5722
5723 /*
5724 * Account for pages consumed while encoding this operation.
5725 * The xdr_stream primitives don't manage rq_next_page.
5726 */
5727 rqstp->rq_next_page = xdr->page_ptr + 1;
1da177e4
LT		 5728}
5729
5730/*
5731 * Encode the reply stored in the stateowner reply cache
5732 *
5733 * XDR note: do not encode rp->rp_buflen: the buffer contains the
5734 * previously sent already encoded operation.
1da177e4
LT		 5735 */
5736void
d0a381dd 5737nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 5738{
bc749ca4 5739 __be32 *p;
1da177e4
LT		 5740 struct nfs4_replay *rp = op->replay;
5741
d0a381dd
BF		 5742 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
5743 if (!p) {
5744 WARN_ON_ONCE(1);
5745 return;
5746 }
c373b0a4 5747 *p++ = cpu_to_be32(op->opnum);
1da177e4 5748 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 5749
0c0c267b 5750 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 5751}
5752
8537488b 5753void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
1da177e4 5754{
3e98abff
BF		 5755 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5756
1da177e4 5757 if (args->ops != args->iops) {
80e591ce 5758 vfree(args->ops);
1da177e4
LT		 5759 args->ops = args->iops;
5760 }
1da177e4 5761 while (args->to_free) {
d5e23383 5762 struct svcxdr_tmpbuf *tb = args->to_free;
1da177e4 5763 args->to_free = tb->next;
1da177e4
LT		 5764 kfree(tb);
5765 }
5766}
5767
c44b31c2 5768bool
16c66364 5769nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
1da177e4 5770{
026fec7e
CH		 5771 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5772
c1346a12 5773 /* svcxdr_tmp_alloc */
1da177e4 5774 args->to_free = NULL;
c1346a12 5775
16c66364 5776 args->xdr = xdr;
1da177e4
LT		 5777 args->ops = args->iops;
5778 args->rqstp = rqstp;
5779
d9b74bda 5780 return nfsd4_decode_compound(args);
1da177e4
LT		 5781}
5782
130e2054 5783bool
fda49441 5784nfs4svc_encode_compoundres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
1da177e4 5785{
63f8de37 5786 struct nfsd4_compoundres *resp = rqstp->rq_resp;
fda49441 5787 __be32 *p;
6ac90391 5788
3b0ebb25
CL		 5789 /*
5790 * Send buffer space for the following items is reserved
5791 * at the top of nfsd4_proc_compound().
5792 */
5793 p = resp->statusp;
5794
5795 *p++ = resp->cstate.status;
1da177e4
LT		 5796 *p++ = htonl(resp->taglen);
5797 memcpy(p, resp->tag, resp->taglen);
5798 p += XDR_QUADLEN(resp->taglen);
5799 *p++ = htonl(resp->opcnt);
5800
b607664e 5801 nfsd4_sequence_done(resp);
130e2054 5802 return true;
1da177e4 5803}
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