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nfsd: improve stateid access bitmask documentation
[linux-block.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1da177e4
LT		 34 */
35
96bcad50 36#include <linux/file.h>
5a0e3ad6 37#include <linux/slab.h>
1da177e4 38#include <linux/namei.h>
341eb184 39#include <linux/statfs.h>
0733d213 40#include <linux/utsname.h>
17456804 41#include <linux/pagemap.h>
4796f457 42#include <linux/sunrpc/svcauth_gss.h>
84e1b21d 43#include <linux/sunrpc/addr.h>
23e50fe3
FL		 44#include <linux/xattr.h>
45#include <uapi/linux/xattr.h>
9a74af21 46
2ca72e17
BF		 47#include "idmap.h"
48#include "acl.h"
9a74af21 49#include "xdr4.h"
0a3adade 50#include "vfs.h"
17456804 51#include "state.h"
1091006c 52#include "cache.h"
3d733711 53#include "netns.h"
9cf514cc 54#include "pnfs.h"
5c4583b2 55#include "filecache.h"
2ca72e17 56
08281341
CL		 57#include "trace.h"
58
18032ca0
DQ		 59#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
60#include <linux/security.h>
61#endif
62
63
1da177e4
LT		 64#define NFSDDBG_FACILITY NFSDDBG_XDR
65
5cf23dbb 66const u32 nfsd_suppattrs[3][3] = {
916d2d84
BF		 67 {NFSD4_SUPPORTED_ATTRS_WORD0,
68 NFSD4_SUPPORTED_ATTRS_WORD1,
69 NFSD4_SUPPORTED_ATTRS_WORD2},
70
71 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
72 NFSD4_1_SUPPORTED_ATTRS_WORD1,
73 NFSD4_1_SUPPORTED_ATTRS_WORD2},
74
75 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
76 NFSD4_1_SUPPORTED_ATTRS_WORD1,
77 NFSD4_2_SUPPORTED_ATTRS_WORD2},
78};
79
42ca0993
BF		 80/*
81 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
82 * directory in order to indicate to the client that a filesystem boundary is present
83 * We use a fixed fsid for a referral
84 */
85#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
86#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
87
b37ad28b 88static __be32
a36b1725 89check_filename(char *str, int len)
1da177e4
LT		 90{
91 int i;
92
93 if (len == 0)
94 return nfserr_inval;
000dfa18
CL		 95 if (len > NFS4_MAXNAMLEN)
96 return nfserr_nametoolong;
1da177e4 97 if (isdotent(str, len))
a36b1725 98 return nfserr_badname;
1da177e4
LT		 99 for (i = 0; i < len; i++)
100 if (str[i] == '/')
a36b1725 101 return nfserr_badname;
1da177e4
LT		 102 return 0;
103}
104
60adfc50
AA		 105static int zero_clientid(clientid_t *clid)
106{
107 return (clid->cl_boot == 0) && (clid->cl_id == 0);
108}
109
2d8498db 110/**
d5e23383 111 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
ce043ac8 112 * @argp: NFSv4 compound argument structure
ed992753 113 * @len: length of buffer to allocate
2d8498db 114 *
ed992753
TM		 115 * Allocates a buffer of size @len to be freed when processing the compound
116 * operation described in @argp finishes.
2d8498db 117 */
d5e23383
BF		 118static void *
119svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
1da177e4 120{
d5e23383 121 struct svcxdr_tmpbuf *tb;
1da177e4 122
d5e23383 123 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
1da177e4 124 if (!tb)
d5e23383 125 return NULL;
1da177e4
LT		 126 tb->next = argp->to_free;
127 argp->to_free = tb;
d5e23383 128 return tb->buf;
1da177e4
LT		 129}
130
29c353b3
BF		 131/*
132 * For xdr strings that need to be passed to other kernel api's
133 * as null-terminated strings.
134 *
135 * Note null-terminating in place usually isn't safe since the
136 * buffer might end on a page boundary.
137 */
138static char *
139svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
140{
d5e23383 141 char *p = svcxdr_tmpalloc(argp, len + 1);
29c353b3
BF		 142
143 if (!p)
144 return NULL;
145 memcpy(p, buf, len);
146 p[len] = '\0';
29c353b3 147 return p;
1da177e4
LT		 148}
149
7b723008
CL		 150static void *
151svcxdr_savemem(struct nfsd4_compoundargs *argp, __be32 *p, u32 len)
152{
153 __be32 *tmp;
154
155 /*
156 * The location of the decoded data item is stable,
157 * so @p is OK to use. This is the common case.
158 */
159 if (p != argp->xdr->scratch.iov_base)
160 return p;
161
162 tmp = svcxdr_tmpalloc(argp, len);
163 if (!tmp)
164 return NULL;
165 memcpy(tmp, p, len);
166 return tmp;
167}
168
5dcbfabb
CL		 169/*
170 * NFSv4 basic data type decoders
171 */
172
1a994408
CL		 173/*
174 * This helper handles variable-length opaques which belong to protocol
175 * elements that this implementation does not support.
176 */
177static __be32
178nfsd4_decode_ignored_string(struct nfsd4_compoundargs *argp, u32 maxlen)
179{
180 u32 len;
181
182 if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
183 return nfserr_bad_xdr;
184 if (maxlen && len > maxlen)
185 return nfserr_bad_xdr;
186 if (!xdr_inline_decode(argp->xdr, len))
187 return nfserr_bad_xdr;
188
189 return nfs_ok;
190}
191
5dcbfabb
CL		 192static __be32
193nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
194{
195 __be32 *p;
196 u32 len;
197
198 if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
199 return nfserr_bad_xdr;
200 if (len == 0 || len > NFS4_OPAQUE_LIMIT)
201 return nfserr_bad_xdr;
202 p = xdr_inline_decode(argp->xdr, len);
203 if (!p)
204 return nfserr_bad_xdr;
7b723008 205 o->data = svcxdr_savemem(argp, p, len);
5dcbfabb
CL		 206 if (!o->data)
207 return nfserr_jukebox;
208 o->len = len;
5dcbfabb
CL		 209
210 return nfs_ok;
211}
212
000dfa18
CL		 213static __be32
214nfsd4_decode_component4(struct nfsd4_compoundargs *argp, char **namp, u32 *lenp)
215{
216 __be32 *p, status;
217
218 if (xdr_stream_decode_u32(argp->xdr, lenp) < 0)
219 return nfserr_bad_xdr;
220 p = xdr_inline_decode(argp->xdr, *lenp);
221 if (!p)
222 return nfserr_bad_xdr;
223 status = check_filename((char *)p, *lenp);
224 if (status)
225 return status;
7b723008 226 *namp = svcxdr_savemem(argp, p, *lenp);
000dfa18
CL		 227 if (!*namp)
228 return nfserr_jukebox;
000dfa18
CL		 229
230 return nfs_ok;
231}
232
1c3eff7e
CL		 233static __be32
234nfsd4_decode_nfstime4(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
235{
236 __be32 *p;
237
238 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 3);
239 if (!p)
240 return nfserr_bad_xdr;
241 p = xdr_decode_hyper(p, &tv->tv_sec);
242 tv->tv_nsec = be32_to_cpup(p++);
243 if (tv->tv_nsec >= (u32)1000000000)
244 return nfserr_inval;
245 return nfs_ok;
246}
247
796dd1c6
CL		 248static __be32
249nfsd4_decode_verifier4(struct nfsd4_compoundargs *argp, nfs4_verifier *verf)
250{
251 __be32 *p;
252
253 p = xdr_inline_decode(argp->xdr, NFS4_VERIFIER_SIZE);
254 if (!p)
255 return nfserr_bad_xdr;
256 memcpy(verf->data, p, sizeof(verf->data));
257 return nfs_ok;
258}
259
d1c263a0
CL		 260/**
261 * nfsd4_decode_bitmap4 - Decode an NFSv4 bitmap4
262 * @argp: NFSv4 compound argument structure
263 * @bmval: pointer to an array of u32's to decode into
264 * @bmlen: size of the @bmval array
265 *
266 * The server needs to return nfs_ok rather than nfserr_bad_xdr when
267 * encountering bitmaps containing bits it does not recognize. This
268 * includes bits in bitmap words past WORDn, where WORDn is the last
269 * bitmap WORD the implementation currently supports. Thus we are
270 * careful here to simply ignore bits in bitmap words that this
271 * implementation has yet to support explicitly.
272 *
273 * Return values:
274 * %nfs_ok: @bmval populated successfully
275 * %nfserr_bad_xdr: the encoded bitmap was invalid
276 */
277static __be32
278nfsd4_decode_bitmap4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen)
279{
280 u32 i, count;
281 __be32 *p;
282
283 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
284 return nfserr_bad_xdr;
285 /* request sanity */
286 if (count > 1000)
287 return nfserr_bad_xdr;
288 p = xdr_inline_decode(argp->xdr, count << 2);
289 if (!p)
290 return nfserr_bad_xdr;
c0019b7d
CL		 291 for (i = 0; i < bmlen; i++)
292 bmval[i] = (i < count) ? be32_to_cpup(p++) : 0;
d1c263a0
CL		 293
294 return nfs_ok;
295}
296
c941a968
CL		 297static __be32
298nfsd4_decode_nfsace4(struct nfsd4_compoundargs *argp, struct nfs4_ace *ace)
299{
300 __be32 *p, status;
301 u32 length;
302
303 if (xdr_stream_decode_u32(argp->xdr, &ace->type) < 0)
304 return nfserr_bad_xdr;
305 if (xdr_stream_decode_u32(argp->xdr, &ace->flag) < 0)
306 return nfserr_bad_xdr;
307 if (xdr_stream_decode_u32(argp->xdr, &ace->access_mask) < 0)
308 return nfserr_bad_xdr;
309
310 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
311 return nfserr_bad_xdr;
312 p = xdr_inline_decode(argp->xdr, length);
313 if (!p)
314 return nfserr_bad_xdr;
315 ace->whotype = nfs4_acl_get_whotype((char *)p, length);
316 if (ace->whotype != NFS4_ACL_WHO_NAMED)
317 status = nfs_ok;
318 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
319 status = nfsd_map_name_to_gid(argp->rqstp,
320 (char *)p, length, &ace->who_gid);
321 else
322 status = nfsd_map_name_to_uid(argp->rqstp,
323 (char *)p, length, &ace->who_uid);
324
325 return status;
326}
327
328/* A counted array of nfsace4's */
329static noinline __be32
330nfsd4_decode_acl(struct nfsd4_compoundargs *argp, struct nfs4_acl **acl)
331{
332 struct nfs4_ace *ace;
333 __be32 status;
334 u32 count;
335
336 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
337 return nfserr_bad_xdr;
338
339 if (count > xdr_stream_remaining(argp->xdr) / 20)
340 /*
341 * Even with 4-byte names there wouldn't be
342 * space for that many aces; something fishy is
343 * going on:
344 */
345 return nfserr_fbig;
346
347 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(count));
348 if (*acl == NULL)
349 return nfserr_jukebox;
350
351 (*acl)->naces = count;
352 for (ace = (*acl)->aces; ace < (*acl)->aces + count; ace++) {
353 status = nfsd4_decode_nfsace4(argp, ace);
354 if (status)
355 return status;
356 }
357
358 return nfs_ok;
359}
360
dabe9182
CL		 361static noinline __be32
362nfsd4_decode_security_label(struct nfsd4_compoundargs *argp,
363 struct xdr_netobj *label)
364{
365 u32 lfs, pi, length;
366 __be32 *p;
367
368 if (xdr_stream_decode_u32(argp->xdr, &lfs) < 0)
369 return nfserr_bad_xdr;
370 if (xdr_stream_decode_u32(argp->xdr, &pi) < 0)
371 return nfserr_bad_xdr;
372
373 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
374 return nfserr_bad_xdr;
375 if (length > NFS4_MAXLABELLEN)
376 return nfserr_badlabel;
377 p = xdr_inline_decode(argp->xdr, length);
378 if (!p)
379 return nfserr_bad_xdr;
380 label->len = length;
381 label->data = svcxdr_dupstr(argp, p, length);
382 if (!label->data)
383 return nfserr_jukebox;
384
385 return nfs_ok;
386}
387
b37ad28b 388static __be32
d1c263a0
CL		 389nfsd4_decode_fattr4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen,
390 struct iattr *iattr, struct nfs4_acl **acl,
391 struct xdr_netobj *label, int *umask)
1da177e4 392{
081d53fe
CL		 393 unsigned int starting_pos;
394 u32 attrlist4_count;
d1c263a0 395 __be32 *p, status;
1da177e4 396
1da177e4 397 iattr->ia_valid = 0;
d1c263a0
CL		 398 status = nfsd4_decode_bitmap4(argp, bmval, bmlen);
399 if (status)
400 return nfserr_bad_xdr;
1da177e4 401
e864c189
BF		 402 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
403 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
404 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
405 if (nfsd_attrs_supported(argp->minorversion, bmval))
406 return nfserr_inval;
407 return nfserr_attrnotsupp;
408 }
409
081d53fe
CL		 410 if (xdr_stream_decode_u32(argp->xdr, &attrlist4_count) < 0)
411 return nfserr_bad_xdr;
412 starting_pos = xdr_stream_pos(argp->xdr);
1da177e4
LT		 413
414 if (bmval[0] & FATTR4_WORD0_SIZE) {
2ac1b9b2
CL		 415 u64 size;
416
417 if (xdr_stream_decode_u64(argp->xdr, &size) < 0)
418 return nfserr_bad_xdr;
419 iattr->ia_size = size;
1da177e4
LT		 420 iattr->ia_valid |= ATTR_SIZE;
421 }
422 if (bmval[0] & FATTR4_WORD0_ACL) {
c941a968
CL		 423 status = nfsd4_decode_acl(argp, acl);
424 if (status)
425 return status;
1da177e4
LT		 426 } else
427 *acl = NULL;
428 if (bmval[1] & FATTR4_WORD1_MODE) {
1c8f0ad7
CL		 429 u32 mode;
430
431 if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
432 return nfserr_bad_xdr;
433 iattr->ia_mode = mode;
1da177e4
LT		 434 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
435 iattr->ia_valid |= ATTR_MODE;
436 }
437 if (bmval[1] & FATTR4_WORD1_OWNER) {
9853a5ac
CL		 438 u32 length;
439
440 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
441 return nfserr_bad_xdr;
442 p = xdr_inline_decode(argp->xdr, length);
443 if (!p)
444 return nfserr_bad_xdr;
445 status = nfsd_map_name_to_uid(argp->rqstp, (char *)p, length,
446 &iattr->ia_uid);
447 if (status)
47c85291 448 return status;
1da177e4
LT		 449 iattr->ia_valid |= ATTR_UID;
450 }
451 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
393c31dd
CL		 452 u32 length;
453
454 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
455 return nfserr_bad_xdr;
456 p = xdr_inline_decode(argp->xdr, length);
457 if (!p)
458 return nfserr_bad_xdr;
459 status = nfsd_map_name_to_gid(argp->rqstp, (char *)p, length,
460 &iattr->ia_gid);
461 if (status)
47c85291 462 return status;
1da177e4
LT		 463 iattr->ia_valid |= ATTR_GID;
464 }
465 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1c3eff7e
CL		 466 u32 set_it;
467
468 if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
469 return nfserr_bad_xdr;
470 switch (set_it) {
1da177e4 471 case NFS4_SET_TO_CLIENT_TIME:
1c3eff7e 472 status = nfsd4_decode_nfstime4(argp, &iattr->ia_atime);
4c94e13e
CH		 473 if (status)
474 return status;
1da177e4
LT		 475 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
476 break;
477 case NFS4_SET_TO_SERVER_TIME:
478 iattr->ia_valid |= ATTR_ATIME;
479 break;
480 default:
1c3eff7e 481 return nfserr_bad_xdr;
1da177e4
LT		 482 }
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,
773 struct nfsd4_access *access)
774{
775 if (xdr_stream_decode_u32(argp->xdr, &access->ac_req_access) < 0)
776 return nfserr_bad_xdr;
777 return nfs_ok;
778}
779
b37ad28b 780static __be32
1da177e4
LT		 781nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
782{
d3d2f381
CL		 783 if (xdr_stream_decode_u32(argp->xdr, &close->cl_seqid) < 0)
784 return nfserr_bad_xdr;
785 return nfsd4_decode_stateid4(argp, &close->cl_stateid);
1da177e4
LT		 786}
787
788
b37ad28b 789static __be32
1da177e4
LT		 790nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
791{
cbd9abb3
CL		 792 if (xdr_stream_decode_u64(argp->xdr, &commit->co_offset) < 0)
793 return nfserr_bad_xdr;
794 if (xdr_stream_decode_u32(argp->xdr, &commit->co_count) < 0)
795 return nfserr_bad_xdr;
796 return nfs_ok;
1da177e4
LT		 797}
798
b37ad28b 799static __be32
1da177e4
LT		 800nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
801{
000dfa18 802 __be32 *p, status;
1da177e4 803
000dfa18
CL		 804 if (xdr_stream_decode_u32(argp->xdr, &create->cr_type) < 0)
805 return nfserr_bad_xdr;
1da177e4
LT		 806 switch (create->cr_type) {
807 case NF4LNK:
000dfa18
CL		 808 if (xdr_stream_decode_u32(argp->xdr, &create->cr_datalen) < 0)
809 return nfserr_bad_xdr;
810 p = xdr_inline_decode(argp->xdr, create->cr_datalen);
811 if (!p)
812 return nfserr_bad_xdr;
29c353b3 813 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
7fb84306 814 if (!create->cr_data)
76f47128 815 return nfserr_jukebox;
1da177e4
LT		 816 break;
817 case NF4BLK:
818 case NF4CHR:
000dfa18
CL		 819 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata1) < 0)
820 return nfserr_bad_xdr;
821 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata2) < 0)
822 return nfserr_bad_xdr;
1da177e4
LT		 823 break;
824 case NF4SOCK:
825 case NF4FIFO:
826 case NF4DIR:
827 default:
828 break;
829 }
000dfa18
CL		 830 status = nfsd4_decode_component4(argp, &create->cr_name,
831 &create->cr_namelen);
832 if (status)
1da177e4 833 return status;
d1c263a0
CL		 834 status = nfsd4_decode_fattr4(argp, create->cr_bmval,
835 ARRAY_SIZE(create->cr_bmval),
836 &create->cr_iattr, &create->cr_acl,
837 &create->cr_label, &create->cr_umask);
c0d6fc8a 838 if (status)
000dfa18 839 return status;
1da177e4 840
000dfa18 841 return nfs_ok;
1da177e4
LT		 842}
843
b37ad28b 844static inline __be32
1da177e4
LT		 845nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
846{
95e6482c 847 return nfsd4_decode_stateid4(argp, &dr->dr_stateid);
1da177e4
LT		 848}
849
b37ad28b 850static inline __be32
1da177e4
LT		 851nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
852{
f759eff2
CL		 853 return nfsd4_decode_bitmap4(argp, getattr->ga_bmval,
854 ARRAY_SIZE(getattr->ga_bmval));
1da177e4
LT		 855}
856
b37ad28b 857static __be32
1da177e4
LT		 858nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
859{
5c505d12 860 return nfsd4_decode_component4(argp, &link->li_name, &link->li_namelen);
1da177e4
LT		 861}
862
8918cc0d
CL		 863static __be32
864nfsd4_decode_open_to_lock_owner4(struct nfsd4_compoundargs *argp,
865 struct nfsd4_lock *lock)
866{
867 __be32 status;
868
869 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_open_seqid) < 0)
870 return nfserr_bad_xdr;
871 status = nfsd4_decode_stateid4(argp, &lock->lk_new_open_stateid);
872 if (status)
873 return status;
874 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_lock_seqid) < 0)
875 return nfserr_bad_xdr;
876 return nfsd4_decode_state_owner4(argp, &lock->lk_new_clientid,
877 &lock->lk_new_owner);
878}
879
880static __be32
881nfsd4_decode_exist_lock_owner4(struct nfsd4_compoundargs *argp,
882 struct nfsd4_lock *lock)
883{
884 __be32 status;
885
886 status = nfsd4_decode_stateid4(argp, &lock->lk_old_lock_stateid);
887 if (status)
888 return status;
889 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_old_lock_seqid) < 0)
890 return nfserr_bad_xdr;
891
892 return nfs_ok;
893}
894
895static __be32
896nfsd4_decode_locker4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
897{
898 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_is_new) < 0)
899 return nfserr_bad_xdr;
900 if (lock->lk_is_new)
901 return nfsd4_decode_open_to_lock_owner4(argp, lock);
902 return nfsd4_decode_exist_lock_owner4(argp, lock);
903}
904
b37ad28b 905static __be32
1da177e4
LT		 906nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
907{
7c59deed
CL		 908 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_type) < 0)
909 return nfserr_bad_xdr;
1da177e4 910 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
7c59deed
CL		 911 return nfserr_bad_xdr;
912 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_reclaim) < 0)
913 return nfserr_bad_xdr;
914 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_offset) < 0)
915 return nfserr_bad_xdr;
916 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_length) < 0)
917 return nfserr_bad_xdr;
918 return nfsd4_decode_locker4(argp, lock);
1da177e4
LT		 919}
920
b37ad28b 921static __be32
1da177e4
LT		 922nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
923{
0a146f04
CL		 924 if (xdr_stream_decode_u32(argp->xdr, &lockt->lt_type) < 0)
925 return nfserr_bad_xdr;
926 if ((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
927 return nfserr_bad_xdr;
928 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_offset) < 0)
929 return nfserr_bad_xdr;
930 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_length) < 0)
931 return nfserr_bad_xdr;
932 return nfsd4_decode_state_owner4(argp, &lockt->lt_clientid,
933 &lockt->lt_owner);
1da177e4
LT		 934}
935
b37ad28b 936static __be32
1da177e4
LT		 937nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
938{
ca9cf9fc 939 __be32 status;
1da177e4 940
ca9cf9fc
CL		 941 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_type) < 0)
942 return nfserr_bad_xdr;
1da177e4 943 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
ca9cf9fc
CL		 944 return nfserr_bad_xdr;
945 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_seqid) < 0)
946 return nfserr_bad_xdr;
947 status = nfsd4_decode_stateid4(argp, &locku->lu_stateid);
e31a1b66
BH		 948 if (status)
949 return status;
ca9cf9fc
CL		 950 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_offset) < 0)
951 return nfserr_bad_xdr;
952 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_length) < 0)
953 return nfserr_bad_xdr;
1da177e4 954
ca9cf9fc 955 return nfs_ok;
1da177e4
LT		 956}
957
b37ad28b 958static __be32
1da177e4
LT		 959nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
960{
3d5877e8 961 return nfsd4_decode_component4(argp, &lookup->lo_name, &lookup->lo_len);
1da177e4
LT		 962}
963
bf33bab3
CL		 964static __be32
965nfsd4_decode_createhow4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
966{
967 __be32 status;
968
969 if (xdr_stream_decode_u32(argp->xdr, &open->op_createmode) < 0)
970 return nfserr_bad_xdr;
971 switch (open->op_createmode) {
972 case NFS4_CREATE_UNCHECKED:
973 case NFS4_CREATE_GUARDED:
974 status = nfsd4_decode_fattr4(argp, open->op_bmval,
975 ARRAY_SIZE(open->op_bmval),
976 &open->op_iattr, &open->op_acl,
977 &open->op_label, &open->op_umask);
978 if (status)
979 return status;
980 break;
981 case NFS4_CREATE_EXCLUSIVE:
982 status = nfsd4_decode_verifier4(argp, &open->op_verf);
983 if (status)
984 return status;
985 break;
986 case NFS4_CREATE_EXCLUSIVE4_1:
987 if (argp->minorversion < 1)
988 return nfserr_bad_xdr;
989 status = nfsd4_decode_verifier4(argp, &open->op_verf);
990 if (status)
991 return status;
992 status = nfsd4_decode_fattr4(argp, open->op_bmval,
993 ARRAY_SIZE(open->op_bmval),
994 &open->op_iattr, &open->op_acl,
995 &open->op_label, &open->op_umask);
996 if (status)
997 return status;
998 break;
999 default:
1000 return nfserr_bad_xdr;
1001 }
1002
1003 return nfs_ok;
1004}
1005
e6ec04b2
CL		 1006static __be32
1007nfsd4_decode_openflag4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
1008{
1009 __be32 status;
1010
1011 if (xdr_stream_decode_u32(argp->xdr, &open->op_create) < 0)
1012 return nfserr_bad_xdr;
1013 switch (open->op_create) {
1014 case NFS4_OPEN_NOCREATE:
1015 break;
1016 case NFS4_OPEN_CREATE:
1017 status = nfsd4_decode_createhow4(argp, open);
1018 if (status)
1019 return status;
1020 break;
1021 default:
1022 return nfserr_bad_xdr;
1023 }
1024
1025 return nfs_ok;
1026}
1027
2c8bd7e0 1028static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664 1029{
04f9e664
BF		 1030 u32 w;
1031
9aa62f51
CL		 1032 if (xdr_stream_decode_u32(argp->xdr, &w) < 0)
1033 return nfserr_bad_xdr;
2c8bd7e0
BH		 1034 *share_access = w & NFS4_SHARE_ACCESS_MASK;
1035 *deleg_want = w & NFS4_SHARE_WANT_MASK;
1036 if (deleg_when)
1037 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
1038
04f9e664
BF		 1039 switch (w & NFS4_SHARE_ACCESS_MASK) {
1040 case NFS4_SHARE_ACCESS_READ:
1041 case NFS4_SHARE_ACCESS_WRITE:
1042 case NFS4_SHARE_ACCESS_BOTH:
1043 break;
1044 default:
1045 return nfserr_bad_xdr;
1046 }
fc0d14fe 1047 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 1048 if (!w)
1049 return nfs_ok;
1050 if (!argp->minorversion)
1051 return nfserr_bad_xdr;
1052 switch (w & NFS4_SHARE_WANT_MASK) {
1053 case NFS4_SHARE_WANT_NO_PREFERENCE:
1054 case NFS4_SHARE_WANT_READ_DELEG:
1055 case NFS4_SHARE_WANT_WRITE_DELEG:
1056 case NFS4_SHARE_WANT_ANY_DELEG:
1057 case NFS4_SHARE_WANT_NO_DELEG:
1058 case NFS4_SHARE_WANT_CANCEL:
1059 break;
1060 default:
1061 return nfserr_bad_xdr;
1062 }
92bac8c5 1063 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 1064 if (!w)
1065 return nfs_ok;
2c8bd7e0
BH		 1066
1067 if (!deleg_when) /* open_downgrade */
1068 return nfserr_inval;
04f9e664
BF		 1069 switch (w) {
1070 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
1071 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 1072 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
1073 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 1074 return nfs_ok;
1075 }
04f9e664
BF		 1076 return nfserr_bad_xdr;
1077}
1078
1079static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
1080{
b07bebd9
CL		 1081 if (xdr_stream_decode_u32(argp->xdr, x) < 0)
1082 return nfserr_bad_xdr;
1083 /* Note: unlike access bits, deny bits may be zero. */
01cd4afa 1084 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664 1085 return nfserr_bad_xdr;
b07bebd9 1086
04f9e664 1087 return nfs_ok;
04f9e664
BF		 1088}
1089
1708e50b
CL		 1090static __be32
1091nfsd4_decode_open_claim4(struct nfsd4_compoundargs *argp,
1092 struct nfsd4_open *open)
1093{
1094 __be32 status;
1095
1096 if (xdr_stream_decode_u32(argp->xdr, &open->op_claim_type) < 0)
1097 return nfserr_bad_xdr;
1098 switch (open->op_claim_type) {
1099 case NFS4_OPEN_CLAIM_NULL:
1100 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1101 status = nfsd4_decode_component4(argp, &open->op_fname,
1102 &open->op_fnamelen);
1103 if (status)
1104 return status;
1105 break;
1106 case NFS4_OPEN_CLAIM_PREVIOUS:
1107 if (xdr_stream_decode_u32(argp->xdr, &open->op_delegate_type) < 0)
1108 return nfserr_bad_xdr;
1109 break;
1110 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1111 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1112 if (status)
1113 return status;
1114 status = nfsd4_decode_component4(argp, &open->op_fname,
1115 &open->op_fnamelen);
1116 if (status)
1117 return status;
1118 break;
1119 case NFS4_OPEN_CLAIM_FH:
1120 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1121 if (argp->minorversion < 1)
1122 return nfserr_bad_xdr;
1123 /* void */
1124 break;
1125 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1126 if (argp->minorversion < 1)
1127 return nfserr_bad_xdr;
1128 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1129 if (status)
1130 return status;
1131 break;
1132 default:
1133 return nfserr_bad_xdr;
1134 }
1135
1136 return nfs_ok;
1137}
1138
b37ad28b 1139static __be32
1da177e4
LT		 1140nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
1141{
61e5e0b3 1142 __be32 status;
2c8bd7e0 1143 u32 dummy;
1da177e4
LT		 1144
1145 memset(open->op_bmval, 0, sizeof(open->op_bmval));
1146 open->op_iattr.ia_valid = 0;
fe0750e5 1147 open->op_openowner = NULL;
1da177e4 1148
9d313b17 1149 open->op_xdr_error = 0;
61e5e0b3
CL		 1150 if (xdr_stream_decode_u32(argp->xdr, &open->op_seqid) < 0)
1151 return nfserr_bad_xdr;
1152 /* deleg_want is ignored */
2c8bd7e0
BH		 1153 status = nfsd4_decode_share_access(argp, &open->op_share_access,
1154 &open->op_deleg_want, &dummy);
04f9e664 1155 if (status)
61e5e0b3 1156 return status;
04f9e664
BF		 1157 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
1158 if (status)
61e5e0b3
CL		 1159 return status;
1160 status = nfsd4_decode_state_owner4(argp, &open->op_clientid,
1161 &open->op_owner);
a084daf5 1162 if (status)
61e5e0b3 1163 return status;
e6ec04b2
CL		 1164 status = nfsd4_decode_openflag4(argp, open);
1165 if (status)
1166 return status;
61e5e0b3 1167 return nfsd4_decode_open_claim4(argp, open);
1da177e4
LT		 1168}
1169
b37ad28b 1170static __be32
1da177e4
LT		 1171nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1172{
06bee693 1173 __be32 status;
e1a90ebd
AS		 1174
1175 if (argp->minorversion >= 1)
1176 return nfserr_notsupp;
1177
06bee693 1178 status = nfsd4_decode_stateid4(argp, &open_conf->oc_req_stateid);
e31a1b66
BH		 1179 if (status)
1180 return status;
06bee693
CL		 1181 if (xdr_stream_decode_u32(argp->xdr, &open_conf->oc_seqid) < 0)
1182 return nfserr_bad_xdr;
e1a90ebd 1183
06bee693 1184 return nfs_ok;
1da177e4
LT		 1185}
1186
b37ad28b 1187static __be32
1da177e4
LT		 1188nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1189{
dca71651
CL		 1190 __be32 status;
1191
1192 status = nfsd4_decode_stateid4(argp, &open_down->od_stateid);
e31a1b66
BH		 1193 if (status)
1194 return status;
dca71651
CL		 1195 if (xdr_stream_decode_u32(argp->xdr, &open_down->od_seqid) < 0)
1196 return nfserr_bad_xdr;
1197 /* deleg_want is ignored */
2c8bd7e0
BH		 1198 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1199 &open_down->od_deleg_want, NULL);
04f9e664
BF		 1200 if (status)
1201 return status;
dca71651 1202 return nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1da177e4
LT		 1203}
1204
b37ad28b 1205static __be32
1da177e4
LT		 1206nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1207{
a73bed98 1208 __be32 *p;
1da177e4 1209
a73bed98
CL		 1210 if (xdr_stream_decode_u32(argp->xdr, &putfh->pf_fhlen) < 0)
1211 return nfserr_bad_xdr;
1da177e4 1212 if (putfh->pf_fhlen > NFS4_FHSIZE)
a73bed98
CL		 1213 return nfserr_bad_xdr;
1214 p = xdr_inline_decode(argp->xdr, putfh->pf_fhlen);
1215 if (!p)
1216 return nfserr_bad_xdr;
7b723008 1217 putfh->pf_fhval = svcxdr_savemem(argp, p, putfh->pf_fhlen);
a73bed98
CL		 1218 if (!putfh->pf_fhval)
1219 return nfserr_jukebox;
1da177e4 1220
a73bed98 1221 return nfs_ok;
1da177e4
LT		 1222}
1223
e1a90ebd
AS		 1224static __be32
1225nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1226{
1227 if (argp->minorversion == 0)
1228 return nfs_ok;
1229 return nfserr_notsupp;
1230}
1231
b37ad28b 1232static __be32
1da177e4
LT		 1233nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1234{
3909c3bc 1235 __be32 status;
1da177e4 1236
3909c3bc 1237 status = nfsd4_decode_stateid4(argp, &read->rd_stateid);
e31a1b66
BH		 1238 if (status)
1239 return status;
3909c3bc
CL		 1240 if (xdr_stream_decode_u64(argp->xdr, &read->rd_offset) < 0)
1241 return nfserr_bad_xdr;
1242 if (xdr_stream_decode_u32(argp->xdr, &read->rd_length) < 0)
1243 return nfserr_bad_xdr;
1da177e4 1244
3909c3bc 1245 return nfs_ok;
1da177e4
LT		 1246}
1247
b37ad28b 1248static __be32
1da177e4
LT		 1249nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1250{
0dfaf2a3 1251 __be32 status;
1da177e4 1252
0dfaf2a3
CL		 1253 if (xdr_stream_decode_u64(argp->xdr, &readdir->rd_cookie) < 0)
1254 return nfserr_bad_xdr;
1255 status = nfsd4_decode_verifier4(argp, &readdir->rd_verf);
1256 if (status)
1257 return status;
1258 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_dircount) < 0)
1259 return nfserr_bad_xdr;
1260 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_maxcount) < 0)
1261 return nfserr_bad_xdr;
1262 if (xdr_stream_decode_uint32_array(argp->xdr, readdir->rd_bmval,
1263 ARRAY_SIZE(readdir->rd_bmval)) < 0)
1264 return nfserr_bad_xdr;
1da177e4 1265
0dfaf2a3 1266 return nfs_ok;
1da177e4
LT		 1267}
1268
b37ad28b 1269static __be32
1da177e4
LT		 1270nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1271{
b7f5fbf2 1272 return nfsd4_decode_component4(argp, &remove->rm_name, &remove->rm_namelen);
1da177e4
LT		 1273}
1274
b37ad28b 1275static __be32
1da177e4
LT		 1276nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1277{
ba881a0a 1278 __be32 status;
1da177e4 1279
ba881a0a
CL		 1280 status = nfsd4_decode_component4(argp, &rename->rn_sname, &rename->rn_snamelen);
1281 if (status)
1da177e4 1282 return status;
ba881a0a 1283 return nfsd4_decode_component4(argp, &rename->rn_tname, &rename->rn_tnamelen);
1da177e4
LT		 1284}
1285
b37ad28b 1286static __be32
1da177e4
LT		 1287nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1288{
d12f9045 1289 return nfsd4_decode_clientid4(argp, clientid);
1da177e4
LT		 1290}
1291
dcb488a3
AA		 1292static __be32
1293nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1294 struct nfsd4_secinfo *secinfo)
1295{
d0abdae5 1296 return nfsd4_decode_component4(argp, &secinfo->si_name, &secinfo->si_namelen);
dcb488a3
AA		 1297}
1298
b37ad28b 1299static __be32
1da177e4
LT		 1300nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1301{
e31a1b66 1302 __be32 status;
1da177e4 1303
44592fe9 1304 status = nfsd4_decode_stateid4(argp, &setattr->sa_stateid);
e31a1b66
BH		 1305 if (status)
1306 return status;
d1c263a0
CL		 1307 return nfsd4_decode_fattr4(argp, setattr->sa_bmval,
1308 ARRAY_SIZE(setattr->sa_bmval),
1309 &setattr->sa_iattr, &setattr->sa_acl,
1310 &setattr->sa_label, NULL);
1da177e4
LT		 1311}
1312
b37ad28b 1313static __be32
1da177e4
LT		 1314nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1315{
92fa6c08 1316 __be32 *p, status;
1da177e4 1317
e1a90ebd
AS		 1318 if (argp->minorversion >= 1)
1319 return nfserr_notsupp;
1320
92fa6c08
CL		 1321 status = nfsd4_decode_verifier4(argp, &setclientid->se_verf);
1322 if (status)
1323 return status;
a084daf5
BF		 1324 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1325 if (status)
92fa6c08
CL		 1326 return status;
1327 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_prog) < 0)
a084daf5 1328 return nfserr_bad_xdr;
92fa6c08
CL		 1329 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_netid_len) < 0)
1330 return nfserr_bad_xdr;
1331 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_netid_len);
1332 if (!p)
1333 return nfserr_bad_xdr;
7b723008 1334 setclientid->se_callback_netid_val = svcxdr_savemem(argp, p,
92fa6c08
CL		 1335 setclientid->se_callback_netid_len);
1336 if (!setclientid->se_callback_netid_val)
1337 return nfserr_jukebox;
1da177e4 1338
92fa6c08
CL		 1339 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_addr_len) < 0)
1340 return nfserr_bad_xdr;
1341 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_addr_len);
1342 if (!p)
1343 return nfserr_bad_xdr;
7b723008 1344 setclientid->se_callback_addr_val = svcxdr_savemem(argp, p,
92fa6c08
CL		 1345 setclientid->se_callback_addr_len);
1346 if (!setclientid->se_callback_addr_val)
1347 return nfserr_jukebox;
92fa6c08
CL		 1348 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_ident) < 0)
1349 return nfserr_bad_xdr;
1da177e4 1350
92fa6c08 1351 return nfs_ok;
1da177e4
LT		 1352}
1353
b37ad28b 1354static __be32
1da177e4
LT		 1355nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1356{
d1ca5514 1357 __be32 status;
1da177e4 1358
e1a90ebd
AS		 1359 if (argp->minorversion >= 1)
1360 return nfserr_notsupp;
1361
d1ca5514
CL		 1362 status = nfsd4_decode_clientid4(argp, &scd_c->sc_clientid);
1363 if (status)
1364 return status;
1365 return nfsd4_decode_verifier4(argp, &scd_c->sc_confirm);
1da177e4
LT		 1366}
1367
1368/* Also used for NVERIFY */
b37ad28b 1369static __be32
1da177e4
LT		 1370nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1371{
67cd453e 1372 __be32 *p, status;
1da177e4 1373
67cd453e
CL		 1374 status = nfsd4_decode_bitmap4(argp, verify->ve_bmval,
1375 ARRAY_SIZE(verify->ve_bmval));
1376 if (status)
1377 return status;
1da177e4
LT		 1378
1379 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1380 * nfsd4_proc_verify */
1381
67cd453e
CL		 1382 if (xdr_stream_decode_u32(argp->xdr, &verify->ve_attrlen) < 0)
1383 return nfserr_bad_xdr;
1384 p = xdr_inline_decode(argp->xdr, verify->ve_attrlen);
1385 if (!p)
1386 return nfserr_bad_xdr;
7b723008 1387 verify->ve_attrval = svcxdr_savemem(argp, p, verify->ve_attrlen);
67cd453e
CL		 1388 if (!verify->ve_attrval)
1389 return nfserr_jukebox;
1da177e4 1390
67cd453e 1391 return nfs_ok;
1da177e4
LT		 1392}
1393
b37ad28b 1394static __be32
1da177e4
LT		 1395nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1396{
244e2bef 1397 __be32 status;
1da177e4 1398
244e2bef 1399 status = nfsd4_decode_stateid4(argp, &write->wr_stateid);
e31a1b66
BH		 1400 if (status)
1401 return status;
244e2bef
CL		 1402 if (xdr_stream_decode_u64(argp->xdr, &write->wr_offset) < 0)
1403 return nfserr_bad_xdr;
1404 if (xdr_stream_decode_u32(argp->xdr, &write->wr_stable_how) < 0)
1405 return nfserr_bad_xdr;
54bbb7d2 1406 if (write->wr_stable_how > NFS_FILE_SYNC)
244e2bef
CL		 1407 return nfserr_bad_xdr;
1408 if (xdr_stream_decode_u32(argp->xdr, &write->wr_buflen) < 0)
1409 return nfserr_bad_xdr;
c1346a12 1410 if (!xdr_stream_subsegment(argp->xdr, &write->wr_payload, write->wr_buflen))
244e2bef 1411 return nfserr_bad_xdr;
1da177e4 1412
244e2bef 1413 return nfs_ok;
1da177e4
LT		 1414}
1415
b37ad28b 1416static __be32
1da177e4
LT		 1417nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1418{
a4a80c15 1419 __be32 status;
1da177e4 1420
e1a90ebd
AS		 1421 if (argp->minorversion >= 1)
1422 return nfserr_notsupp;
1423
a4a80c15
CL		 1424 status = nfsd4_decode_state_owner4(argp, &rlockowner->rl_clientid,
1425 &rlockowner->rl_owner);
1426 if (status)
1427 return status;
1da177e4 1428
60adfc50
AA		 1429 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1430 return nfserr_inval;
a4a80c15
CL		 1431
1432 return nfs_ok;
1da177e4
LT		 1433}
1434
0f81d960
CL		 1435static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
1436{
1437 if (xdr_stream_decode_u32(argp->xdr, &bc->bc_cb_program) < 0)
1438 return nfserr_bad_xdr;
1439 return nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
1440}
1441
571e0451
CL		 1442static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
1443{
1444 u32 use_conn_in_rdma_mode;
1445 __be32 status;
1446
1447 status = nfsd4_decode_sessionid4(argp, &bcts->sessionid);
1448 if (status)
1449 return status;
1450 if (xdr_stream_decode_u32(argp->xdr, &bcts->dir) < 0)
1451 return nfserr_bad_xdr;
1452 if (xdr_stream_decode_u32(argp->xdr, &use_conn_in_rdma_mode) < 0)
1453 return nfserr_bad_xdr;
1454
1455 return nfs_ok;
1456}
1457
2548aa78
CL		 1458static __be32
1459nfsd4_decode_state_protect_ops(struct nfsd4_compoundargs *argp,
1460 struct nfsd4_exchange_id *exid)
1461{
1462 __be32 status;
1463
1464 status = nfsd4_decode_bitmap4(argp, exid->spo_must_enforce,
1465 ARRAY_SIZE(exid->spo_must_enforce));
1466 if (status)
1467 return nfserr_bad_xdr;
1468 status = nfsd4_decode_bitmap4(argp, exid->spo_must_allow,
1469 ARRAY_SIZE(exid->spo_must_allow));
1470 if (status)
1471 return nfserr_bad_xdr;
1472
1473 return nfs_ok;
1474}
1475
547bfeb4
CL		 1476/*
1477 * This implementation currently does not support SP4_SSV.
1478 * This decoder simply skips over these arguments.
1479 */
1480static noinline __be32
1481nfsd4_decode_ssv_sp_parms(struct nfsd4_compoundargs *argp,
1482 struct nfsd4_exchange_id *exid)
1483{
1484 u32 count, window, num_gss_handles;
1485 __be32 status;
1486
1487 /* ssp_ops */
1488 status = nfsd4_decode_state_protect_ops(argp, exid);
1489 if (status)
1490 return status;
1491
1492 /* ssp_hash_algs<> */
1493 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1494 return nfserr_bad_xdr;
1495 while (count--) {
1496 status = nfsd4_decode_ignored_string(argp, 0);
1497 if (status)
1498 return status;
1499 }
1500
1501 /* ssp_encr_algs<> */
1502 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1503 return nfserr_bad_xdr;
1504 while (count--) {
1505 status = nfsd4_decode_ignored_string(argp, 0);
1506 if (status)
1507 return status;
1508 }
1509
1510 if (xdr_stream_decode_u32(argp->xdr, &window) < 0)
1511 return nfserr_bad_xdr;
1512 if (xdr_stream_decode_u32(argp->xdr, &num_gss_handles) < 0)
1513 return nfserr_bad_xdr;
1514
1515 return nfs_ok;
1516}
1517
2db134eb 1518static __be32
523ec6ed
CL		 1519nfsd4_decode_state_protect4_a(struct nfsd4_compoundargs *argp,
1520 struct nfsd4_exchange_id *exid)
2db134eb 1521{
523ec6ed 1522 __be32 status;
0733d213 1523
523ec6ed 1524 if (xdr_stream_decode_u32(argp->xdr, &exid->spa_how) < 0)
a084daf5 1525 return nfserr_bad_xdr;
0733d213
AA		 1526 switch (exid->spa_how) {
1527 case SP4_NONE:
1528 break;
1529 case SP4_MACH_CRED:
2548aa78 1530 status = nfsd4_decode_state_protect_ops(argp, exid);
ed941643 1531 if (status)
2548aa78 1532 return status;
0733d213
AA		 1533 break;
1534 case SP4_SSV:
547bfeb4 1535 status = nfsd4_decode_ssv_sp_parms(argp, exid);
2548aa78
CL		 1536 if (status)
1537 return status;
0733d213
AA		 1538 break;
1539 default:
523ec6ed 1540 return nfserr_bad_xdr;
0733d213
AA		 1541 }
1542
523ec6ed
CL		 1543 return nfs_ok;
1544}
1545
10ff8422
CL		 1546static __be32
1547nfsd4_decode_nfs_impl_id4(struct nfsd4_compoundargs *argp,
1548 struct nfsd4_exchange_id *exid)
1549{
1550 __be32 status;
1551 u32 count;
1552
1553 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1554 return nfserr_bad_xdr;
1555 switch (count) {
1556 case 0:
1557 break;
1558 case 1:
1559 /* Note that RFC 8881 places no length limit on
1560 * nii_domain, but this implementation permits no
1561 * more than NFS4_OPAQUE_LIMIT bytes */
1562 status = nfsd4_decode_opaque(argp, &exid->nii_domain);
1563 if (status)
1564 return status;
1565 /* Note that RFC 8881 places no length limit on
1566 * nii_name, but this implementation permits no
1567 * more than NFS4_OPAQUE_LIMIT bytes */
1568 status = nfsd4_decode_opaque(argp, &exid->nii_name);
1569 if (status)
1570 return status;
1571 status = nfsd4_decode_nfstime4(argp, &exid->nii_time);
1572 if (status)
1573 return status;
1574 break;
1575 default:
1576 return nfserr_bad_xdr;
1577 }
1578
1579 return nfs_ok;
1580}
1581
523ec6ed
CL		 1582static __be32
1583nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1584 struct nfsd4_exchange_id *exid)
1585{
10ff8422 1586 __be32 status;
523ec6ed
CL		 1587
1588 status = nfsd4_decode_verifier4(argp, &exid->verifier);
1589 if (status)
1590 return status;
1591 status = nfsd4_decode_opaque(argp, &exid->clname);
1592 if (status)
1593 return status;
1594 if (xdr_stream_decode_u32(argp->xdr, &exid->flags) < 0)
1595 return nfserr_bad_xdr;
1596 status = nfsd4_decode_state_protect4_a(argp, exid);
1597 if (status)
1598 return status;
10ff8422 1599 return nfsd4_decode_nfs_impl_id4(argp, exid);
2db134eb
AA		 1600}
1601
3a3f1fba
CL		 1602static __be32
1603nfsd4_decode_channel_attrs4(struct nfsd4_compoundargs *argp,
1604 struct nfsd4_channel_attrs *ca)
1605{
1606 __be32 *p;
1607
1608 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 7);
1609 if (!p)
1610 return nfserr_bad_xdr;
1611
1612 /* headerpadsz is ignored */
1613 p++;
1614 ca->maxreq_sz = be32_to_cpup(p++);
1615 ca->maxresp_sz = be32_to_cpup(p++);
1616 ca->maxresp_cached = be32_to_cpup(p++);
1617 ca->maxops = be32_to_cpup(p++);
1618 ca->maxreqs = be32_to_cpup(p++);
1619 ca->nr_rdma_attrs = be32_to_cpup(p);
1620 switch (ca->nr_rdma_attrs) {
1621 case 0:
1622 break;
1623 case 1:
1624 if (xdr_stream_decode_u32(argp->xdr, &ca->rdma_attrs) < 0)
1625 return nfserr_bad_xdr;
1626 break;
1627 default:
1628 return nfserr_bad_xdr;
1629 }
1630
1631 return nfs_ok;
1632}
1633
2db134eb
AA		 1634static __be32
1635nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1636 struct nfsd4_create_session *sess)
1637{
81243e3f 1638 __be32 status;
ec6b5d7b 1639
81243e3f
CL		 1640 status = nfsd4_decode_clientid4(argp, &sess->clientid);
1641 if (status)
1642 return status;
1643 if (xdr_stream_decode_u32(argp->xdr, &sess->seqid) < 0)
1644 return nfserr_bad_xdr;
1645 if (xdr_stream_decode_u32(argp->xdr, &sess->flags) < 0)
1646 return nfserr_bad_xdr;
3a3f1fba
CL		 1647 status = nfsd4_decode_channel_attrs4(argp, &sess->fore_channel);
1648 if (status)
1649 return status;
1650 status = nfsd4_decode_channel_attrs4(argp, &sess->back_channel);
81243e3f
CL		 1651 if (status)
1652 return status;
1653 if (xdr_stream_decode_u32(argp->xdr, &sess->callback_prog) < 0)
1654 return nfserr_bad_xdr;
1655 status = nfsd4_decode_cb_sec(argp, &sess->cb_sec);
3a3f1fba
CL		 1656 if (status)
1657 return status;
ec6b5d7b 1658
81243e3f 1659 return nfs_ok;
2db134eb
AA		 1660}
1661
1662static __be32
1663nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1664 struct nfsd4_destroy_session *destroy_session)
1665{
94e254af 1666 return nfsd4_decode_sessionid4(argp, &destroy_session->sessionid);
2db134eb
AA		 1667}
1668
e1ca12df
BS		 1669static __be32
1670nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1671 struct nfsd4_free_stateid *free_stateid)
1672{
aec387d5 1673 return nfsd4_decode_stateid4(argp, &free_stateid->fr_stateid);
e1ca12df
BS		 1674}
1675
9cf514cc
CH		 1676#ifdef CONFIG_NFSD_PNFS
1677static __be32
1678nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1679 struct nfsd4_getdeviceinfo *gdev)
1680{
04495971
CL		 1681 __be32 status;
1682
1683 status = nfsd4_decode_deviceid4(argp, &gdev->gd_devid);
1684 if (status)
1685 return status;
1686 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_layout_type) < 0)
1687 return nfserr_bad_xdr;
1688 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_maxcount) < 0)
1689 return nfserr_bad_xdr;
1690 if (xdr_stream_decode_uint32_array(argp->xdr,
1691 &gdev->gd_notify_types, 1) < 0)
1692 return nfserr_bad_xdr;
1693
1694 return nfs_ok;
9cf514cc
CH		 1695}
1696
5185980d
CL		 1697static __be32
1698nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1699 struct nfsd4_layoutcommit *lcp)
1700{
1701 __be32 *p, status;
1702
1703 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.offset) < 0)
1704 return nfserr_bad_xdr;
1705 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.length) < 0)
1706 return nfserr_bad_xdr;
1707 if (xdr_stream_decode_bool(argp->xdr, &lcp->lc_reclaim) < 0)
1708 return nfserr_bad_xdr;
1709 status = nfsd4_decode_stateid4(argp, &lcp->lc_sid);
1710 if (status)
1711 return status;
1712 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_newoffset) < 0)
1713 return nfserr_bad_xdr;
1714 if (lcp->lc_newoffset) {
1715 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_last_wr) < 0)
1716 return nfserr_bad_xdr;
1717 } else
1718 lcp->lc_last_wr = 0;
1719 p = xdr_inline_decode(argp->xdr, XDR_UNIT);
1720 if (!p)
1721 return nfserr_bad_xdr;
1722 if (xdr_item_is_present(p)) {
1723 status = nfsd4_decode_nfstime4(argp, &lcp->lc_mtime);
1724 if (status)
1725 return status;
1726 } else {
1727 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1728 }
1729 return nfsd4_decode_layoutupdate4(argp, lcp);
1730}
1731
9cf514cc
CH		 1732static __be32
1733nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1734 struct nfsd4_layoutget *lgp)
1735{
c8e88e3a 1736 __be32 status;
db59c0ef 1737
c8e88e3a
CL		 1738 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_signal) < 0)
1739 return nfserr_bad_xdr;
1740 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_layout_type) < 0)
1741 return nfserr_bad_xdr;
1742 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_seg.iomode) < 0)
1743 return nfserr_bad_xdr;
1744 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.offset) < 0)
1745 return nfserr_bad_xdr;
1746 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.length) < 0)
1747 return nfserr_bad_xdr;
1748 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_minlength) < 0)
1749 return nfserr_bad_xdr;
1750 status = nfsd4_decode_stateid4(argp, &lgp->lg_sid);
db59c0ef
KM		 1751 if (status)
1752 return status;
c8e88e3a
CL		 1753 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_maxcount) < 0)
1754 return nfserr_bad_xdr;
db59c0ef 1755
c8e88e3a 1756 return nfs_ok;
9cf514cc
CH		 1757}
1758
9cf514cc
CH		 1759static __be32
1760nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1761 struct nfsd4_layoutreturn *lrp)
1762{
645fcad3
CL		 1763 if (xdr_stream_decode_bool(argp->xdr, &lrp->lr_reclaim) < 0)
1764 return nfserr_bad_xdr;
1765 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_layout_type) < 0)
1766 return nfserr_bad_xdr;
1767 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_seg.iomode) < 0)
1768 return nfserr_bad_xdr;
1769 return nfsd4_decode_layoutreturn4(argp, lrp);
9cf514cc
CH		 1770}
1771#endif /* CONFIG_NFSD_PNFS */
1772
53d70873
CL		 1773static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1774 struct nfsd4_secinfo_no_name *sin)
1775{
1776 if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0)
1777 return nfserr_bad_xdr;
1778 return nfs_ok;
1779}
1780
cf907b11
CL		 1781static __be32
1782nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1783 struct nfsd4_sequence *seq)
1784{
1785 __be32 *p, status;
1786
1787 status = nfsd4_decode_sessionid4(argp, &seq->sessionid);
1788 if (status)
1789 return status;
1790 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 4);
1791 if (!p)
1792 return nfserr_bad_xdr;
1793 seq->seqid = be32_to_cpup(p++);
1794 seq->slotid = be32_to_cpup(p++);
1795 seq->maxslots = be32_to_cpup(p++);
1796 seq->cachethis = be32_to_cpup(p);
1797
1798 return nfs_ok;
1799}
1800
b7a0c8f6
CL		 1801static __be32
1802nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1803{
1804 struct nfsd4_test_stateid_id *stateid;
1805 __be32 status;
1806 u32 i;
1807
1808 if (xdr_stream_decode_u32(argp->xdr, &test_stateid->ts_num_ids) < 0)
1809 return nfserr_bad_xdr;
1810
1811 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1812 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1813 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1814 if (!stateid)
1815 return nfserrno(-ENOMEM); /* XXX: not jukebox? */
1816 INIT_LIST_HEAD(&stateid->ts_id_list);
1817 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1818 status = nfsd4_decode_stateid4(argp, &stateid->ts_id_stateid);
1819 if (status)
1820 return status;
1821 }
1822
1823 return nfs_ok;
1824}
1825
c95f2ec3
CL		 1826static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp,
1827 struct nfsd4_destroy_clientid *dc)
1828{
1829 return nfsd4_decode_clientid4(argp, &dc->clientid);
1830}
1831
0d646784
CL		 1832static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp,
1833 struct nfsd4_reclaim_complete *rc)
1834{
1835 if (xdr_stream_decode_bool(argp->xdr, &rc->rca_one_fs) < 0)
1836 return nfserr_bad_xdr;
1837 return nfs_ok;
1838}
1839
95d871f0
AS		 1840static __be32
1841nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1842 struct nfsd4_fallocate *fallocate)
1843{
6aef27aa 1844 __be32 status;
95d871f0 1845
6aef27aa 1846 status = nfsd4_decode_stateid4(argp, &fallocate->falloc_stateid);
95d871f0
AS		 1847 if (status)
1848 return status;
6aef27aa
CL		 1849 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_offset) < 0)
1850 return nfserr_bad_xdr;
1851 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_length) < 0)
1852 return nfserr_bad_xdr;
95d871f0 1853
6aef27aa 1854 return nfs_ok;
95d871f0
AS		 1855}
1856
84e1b21d
OK		 1857static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
1858 struct nl4_server *ns)
1859{
84e1b21d 1860 struct nfs42_netaddr *naddr;
f49e4b4d 1861 __be32 *p;
84e1b21d 1862
f49e4b4d
CL		 1863 if (xdr_stream_decode_u32(argp->xdr, &ns->nl4_type) < 0)
1864 return nfserr_bad_xdr;
84e1b21d
OK		 1865
1866 /* currently support for 1 inter-server source server */
1867 switch (ns->nl4_type) {
1868 case NL4_NETADDR:
1869 naddr = &ns->u.nl4_addr;
1870
f49e4b4d
CL		 1871 if (xdr_stream_decode_u32(argp->xdr, &naddr->netid_len) < 0)
1872 return nfserr_bad_xdr;
84e1b21d 1873 if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
f49e4b4d 1874 return nfserr_bad_xdr;
84e1b21d 1875
f49e4b4d
CL		 1876 p = xdr_inline_decode(argp->xdr, naddr->netid_len);
1877 if (!p)
1878 return nfserr_bad_xdr;
1879 memcpy(naddr->netid, p, naddr->netid_len);
84e1b21d 1880
f49e4b4d
CL		 1881 if (xdr_stream_decode_u32(argp->xdr, &naddr->addr_len) < 0)
1882 return nfserr_bad_xdr;
84e1b21d 1883 if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
f49e4b4d 1884 return nfserr_bad_xdr;
84e1b21d 1885
f49e4b4d
CL		 1886 p = xdr_inline_decode(argp->xdr, naddr->addr_len);
1887 if (!p)
1888 return nfserr_bad_xdr;
1889 memcpy(naddr->addr, p, naddr->addr_len);
84e1b21d
OK		 1890 break;
1891 default:
f49e4b4d 1892 return nfserr_bad_xdr;
84e1b21d 1893 }
f49e4b4d
CL		 1894
1895 return nfs_ok;
84e1b21d
OK		 1896}
1897
29ae7f9d
AS		 1898static __be32
1899nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1900{
84e1b21d 1901 struct nl4_server *ns_dummy;
e8febea7
CL		 1902 u32 consecutive, i, count;
1903 __be32 status;
29ae7f9d 1904
e8febea7 1905 status = nfsd4_decode_stateid4(argp, &copy->cp_src_stateid);
29ae7f9d
AS		 1906 if (status)
1907 return status;
e8febea7 1908 status = nfsd4_decode_stateid4(argp, &copy->cp_dst_stateid);
29ae7f9d
AS		 1909 if (status)
1910 return status;
e8febea7
CL		 1911 if (xdr_stream_decode_u64(argp->xdr, &copy->cp_src_pos) < 0)
1912 return nfserr_bad_xdr;
1913 if (xdr_stream_decode_u64(argp->xdr, &copy->cp_dst_pos) < 0)
1914 return nfserr_bad_xdr;
1915 if (xdr_stream_decode_u64(argp->xdr, &copy->cp_count) < 0)
1916 return nfserr_bad_xdr;
1917 /* ca_consecutive: we always do consecutive copies */
1918 if (xdr_stream_decode_u32(argp->xdr, &consecutive) < 0)
1919 return nfserr_bad_xdr;
1920 if (xdr_stream_decode_u32(argp->xdr, &copy->cp_synchronous) < 0)
1921 return nfserr_bad_xdr;
29ae7f9d 1922
e8febea7
CL		 1923 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1924 return nfserr_bad_xdr;
84e1b21d
OK		 1925 copy->cp_intra = false;
1926 if (count == 0) { /* intra-server copy */
1927 copy->cp_intra = true;
e8febea7 1928 return nfs_ok;
84e1b21d
OK		 1929 }
1930
e8febea7 1931 /* decode all the supplied server addresses but use only the first */
84e1b21d
OK		 1932 status = nfsd4_decode_nl4_server(argp, &copy->cp_src);
1933 if (status)
1934 return status;
1935
1936 ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
1937 if (ns_dummy == NULL)
e8febea7 1938 return nfserrno(-ENOMEM); /* XXX: jukebox? */
84e1b21d
OK		 1939 for (i = 0; i < count - 1; i++) {
1940 status = nfsd4_decode_nl4_server(argp, ns_dummy);
1941 if (status) {
1942 kfree(ns_dummy);
1943 return status;
1944 }
1945 }
1946 kfree(ns_dummy);
29ae7f9d 1947
e8febea7 1948 return nfs_ok;
29ae7f9d
AS		 1949}
1950
51911868
OK		 1951static __be32
1952nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
1953 struct nfsd4_copy_notify *cn)
1954{
5aff7d08 1955 __be32 status;
51911868 1956
f9a953fb 1957 status = nfsd4_decode_stateid4(argp, &cn->cpn_src_stateid);
51911868
OK		 1958 if (status)
1959 return status;
1960 return nfsd4_decode_nl4_server(argp, &cn->cpn_dst);
1961}
1962
f9a953fb
CL		 1963static __be32
1964nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
1965 struct nfsd4_offload_status *os)
1966{
2846bb05 1967 return nfsd4_decode_stateid4(argp, &os->stateid);
f9a953fb
CL		 1968}
1969
24bab491
AS		 1970static __be32
1971nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1972{
9d32b412 1973 __be32 status;
24bab491 1974
9d32b412 1975 status = nfsd4_decode_stateid4(argp, &seek->seek_stateid);
24bab491
AS		 1976 if (status)
1977 return status;
9d32b412
CL		 1978 if (xdr_stream_decode_u64(argp->xdr, &seek->seek_offset) < 0)
1979 return nfserr_bad_xdr;
1980 if (xdr_stream_decode_u32(argp->xdr, &seek->seek_whence) < 0)
1981 return nfserr_bad_xdr;
24bab491 1982
9d32b412 1983 return nfs_ok;
24bab491
AS		 1984}
1985
3dfd0b0e
CL		 1986static __be32
1987nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1988{
1989 __be32 status;
1990
1991 status = nfsd4_decode_stateid4(argp, &clone->cl_src_stateid);
1992 if (status)
1993 return status;
1994 status = nfsd4_decode_stateid4(argp, &clone->cl_dst_stateid);
1995 if (status)
1996 return status;
1997 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_src_pos) < 0)
1998 return nfserr_bad_xdr;
1999 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_dst_pos) < 0)
2000 return nfserr_bad_xdr;
2001 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_count) < 0)
2002 return nfserr_bad_xdr;
2003
2004 return nfs_ok;
2005}
2006
23e50fe3
FL		 2007/*
2008 * XDR data that is more than PAGE_SIZE in size is normally part of a
2009 * read or write. However, the size of extended attributes is limited
2010 * by the maximum request size, and then further limited by the underlying
2011 * filesystem limits. This can exceed PAGE_SIZE (currently, XATTR_SIZE_MAX
2012 * is 64k). Since there is no kvec- or page-based interface to xattrs,
2013 * and we're not dealing with contiguous pages, we need to do some copying.
2014 */
2015
2016/*
c1346a12 2017 * Decode data into buffer.
23e50fe3
FL		 2018 */
2019static __be32
c1346a12
CL		 2020nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct xdr_buf *xdr,
2021 char **bufp, u32 buflen)
23e50fe3 2022{
c1346a12
CL		 2023 struct page **pages = xdr->pages;
2024 struct kvec *head = xdr->head;
23e50fe3
FL		 2025 char *tmp, *dp;
2026 u32 len;
2027
2028 if (buflen <= head->iov_len) {
2029 /*
2030 * We're in luck, the head has enough space. Just return
2031 * the head, no need for copying.
2032 */
2033 *bufp = head->iov_base;
2034 return 0;
2035 }
2036
2037 tmp = svcxdr_tmpalloc(argp, buflen);
2038 if (tmp == NULL)
2039 return nfserr_jukebox;
2040
2041 dp = tmp;
2042 memcpy(dp, head->iov_base, head->iov_len);
2043 buflen -= head->iov_len;
2044 dp += head->iov_len;
2045
2046 while (buflen > 0) {
2047 len = min_t(u32, buflen, PAGE_SIZE);
2048 memcpy(dp, page_address(*pages), len);
2049
2050 buflen -= len;
2051 dp += len;
2052 pages++;
2053 }
2054
2055 *bufp = tmp;
2056 return 0;
2057}
2058
2059/*
2060 * Get a user extended attribute name from the XDR buffer.
2061 * It will not have the "user." prefix, so prepend it.
2062 * Lastly, check for nul characters in the name.
2063 */
2064static __be32
2065nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep)
2066{
23e50fe3
FL		 2067 char *name, *sp, *dp;
2068 u32 namelen, cnt;
830c7150 2069 __be32 *p;
23e50fe3 2070
830c7150
CL		 2071 if (xdr_stream_decode_u32(argp->xdr, &namelen) < 0)
2072 return nfserr_bad_xdr;
23e50fe3
FL		 2073 if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN))
2074 return nfserr_nametoolong;
23e50fe3 2075 if (namelen == 0)
830c7150
CL		 2076 return nfserr_bad_xdr;
2077 p = xdr_inline_decode(argp->xdr, namelen);
2078 if (!p)
2079 return nfserr_bad_xdr;
23e50fe3
FL		 2080 name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1);
2081 if (!name)
2082 return nfserr_jukebox;
23e50fe3
FL		 2083 memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2084
2085 /*
2086 * Copy the extended attribute name over while checking for 0
2087 * characters.
2088 */
2089 sp = (char *)p;
2090 dp = name + XATTR_USER_PREFIX_LEN;
2091 cnt = namelen;
2092
2093 while (cnt-- > 0) {
2094 if (*sp == '\0')
830c7150 2095 return nfserr_bad_xdr;
23e50fe3
FL		 2096 *dp++ = *sp++;
2097 }
2098 *dp = '\0';
2099
2100 *namep = name;
2101
830c7150 2102 return nfs_ok;
23e50fe3
FL		 2103}
2104
2105/*
2106 * A GETXATTR op request comes without a length specifier. We just set the
2107 * maximum length for the reply based on XATTR_SIZE_MAX and the maximum
2108 * channel reply size. nfsd_getxattr will probe the length of the xattr,
2109 * check it against getxa_len, and allocate + return the value.
2110 */
2111static __be32
2112nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp,
2113 struct nfsd4_getxattr *getxattr)
2114{
2115 __be32 status;
2116 u32 maxcount;
2117
2118 status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name);
2119 if (status)
2120 return status;
2121
2122 maxcount = svc_max_payload(argp->rqstp);
2123 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2124
2125 getxattr->getxa_len = maxcount;
2126
2127 return status;
2128}
2129
2130static __be32
2131nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp,
2132 struct nfsd4_setxattr *setxattr)
2133{
23e50fe3 2134 u32 flags, maxcount, size;
403366a7 2135 __be32 status;
23e50fe3 2136
403366a7
CL		 2137 if (xdr_stream_decode_u32(argp->xdr, &flags) < 0)
2138 return nfserr_bad_xdr;
23e50fe3
FL		 2139
2140 if (flags > SETXATTR4_REPLACE)
2141 return nfserr_inval;
2142 setxattr->setxa_flags = flags;
2143
2144 status = nfsd4_decode_xattr_name(argp, &setxattr->setxa_name);
2145 if (status)
2146 return status;
2147
2148 maxcount = svc_max_payload(argp->rqstp);
2149 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2150
403366a7
CL		 2151 if (xdr_stream_decode_u32(argp->xdr, &size) < 0)
2152 return nfserr_bad_xdr;
23e50fe3
FL		 2153 if (size > maxcount)
2154 return nfserr_xattr2big;
2155
2156 setxattr->setxa_len = size;
2157 if (size > 0) {
c1346a12 2158 struct xdr_buf payload;
23e50fe3 2159
c1346a12 2160 if (!xdr_stream_subsegment(argp->xdr, &payload, size))
403366a7 2161 return nfserr_bad_xdr;
c1346a12
CL		 2162 status = nfsd4_vbuf_from_vector(argp, &payload,
2163 &setxattr->setxa_buf, size);
23e50fe3
FL		 2164 }
2165
403366a7 2166 return nfs_ok;
23e50fe3
FL		 2167}
2168
2169static __be32
2170nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp,
2171 struct nfsd4_listxattrs *listxattrs)
2172{
23e50fe3
FL		 2173 u32 maxcount;
2174
2212036c
CL		 2175 if (xdr_stream_decode_u64(argp->xdr, &listxattrs->lsxa_cookie) < 0)
2176 return nfserr_bad_xdr;
23e50fe3
FL		 2177
2178 /*
2179 * If the cookie is too large to have even one user.x attribute
2180 * plus trailing '\0' left in a maximum size buffer, it's invalid.
2181 */
2182 if (listxattrs->lsxa_cookie >=
2183 (XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2)))
2184 return nfserr_badcookie;
2185
2212036c
CL		 2186 if (xdr_stream_decode_u32(argp->xdr, &maxcount) < 0)
2187 return nfserr_bad_xdr;
23e50fe3
FL		 2188 if (maxcount < 8)
2189 /* Always need at least 2 words (length and one character) */
2190 return nfserr_inval;
2191
2192 maxcount = min(maxcount, svc_max_payload(argp->rqstp));
2193 listxattrs->lsxa_maxcount = maxcount;
2194
2212036c 2195 return nfs_ok;
23e50fe3
FL		 2196}
2197
2198static __be32
2199nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp,
2200 struct nfsd4_removexattr *removexattr)
2201{
2202 return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name);
2203}
2204
347e0ad9
BH		 2205static __be32
2206nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
2207{
2208 return nfs_ok;
2209}
2210
3c375c6f
BH		 2211static __be32
2212nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
2213{
1e685ec2 2214 return nfserr_notsupp;
3c375c6f
BH		 2215}
2216
347e0ad9
BH		 2217typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
2218
c1df609d 2219static const nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 2220 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
2221 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
2222 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
2223 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
2224 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
2225 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
2226 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
2227 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
2228 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
2229 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
2230 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
2231 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
2232 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
2233 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
2234 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2235 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
2236 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
2237 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
2238 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
2239 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 2240 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 2241 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
2242 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
2243 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
2244 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
2245 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
2246 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
2247 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
2248 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
2249 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
2250 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
2251 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
2252 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
2253 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
2254 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2255 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
2256 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 2257
2258 /* new operations for NFSv4.1 */
cb73a9f4 2259 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 2260 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 2261 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
2262 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
2263 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 2264 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae 2265 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc
CH		 2266#ifdef CONFIG_NFSD_PNFS
2267 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
2268 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2269 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
2270 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
2271 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
2272#else
9064caae
RD		 2273 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
2274 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2275 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
2276 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
2277 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc 2278#endif
04f4ad16 2279 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 2280 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
2281 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 2282 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 2283 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 2284 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 2285 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
87a15a80
AS		 2286
2287 /* new operations for NFSv4.2 */
95d871f0 2288 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
29ae7f9d 2289 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
51911868 2290 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_copy_notify,
b0cb9085 2291 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
87a15a80
AS		 2292 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
2293 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
2294 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
885e2bf3 2295 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status,
6308bc98 2296 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status,
528b8493 2297 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_read,
24bab491 2298 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
87a15a80 2299 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
ffa0160a 2300 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
23e50fe3
FL		 2301 /* RFC 8276 extended atributes operations */
2302 [OP_GETXATTR] = (nfsd4_dec)nfsd4_decode_getxattr,
2303 [OP_SETXATTR] = (nfsd4_dec)nfsd4_decode_setxattr,
2304 [OP_LISTXATTRS] = (nfsd4_dec)nfsd4_decode_listxattrs,
2305 [OP_REMOVEXATTR] = (nfsd4_dec)nfsd4_decode_removexattr,
2db134eb
AA		 2306};
2307
e1a90ebd
AS		 2308static inline bool
2309nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
2310{
8217d146 2311 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 2312 return false;
8217d146 2313 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 2314 return false;
8217d146
AS		 2315 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
2316 return false;
2317 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 2318 return false;
2319 return true;
2320}
f2feb96b 2321
c44b31c2 2322static bool
1da177e4
LT		 2323nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
2324{
1da177e4 2325 struct nfsd4_op *op;
1091006c 2326 bool cachethis = false;
a5cddc88
BF		 2327 int auth_slack= argp->rqstp->rq_auth_slack;
2328 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 2329 int readcount = 0;
2330 int readbytes = 0;
d9b74bda 2331 __be32 *p;
1da177e4
LT		 2332 int i;
2333
d9b74bda 2334 if (xdr_stream_decode_u32(argp->xdr, &argp->taglen) < 0)
c44b31c2 2335 return false;
d9b74bda
CL		 2336 max_reply += XDR_UNIT;
2337 argp->tag = NULL;
2338 if (unlikely(argp->taglen)) {
2339 if (argp->taglen > NFSD4_MAX_TAGLEN)
c44b31c2 2340 return false;
d9b74bda
CL		 2341 p = xdr_inline_decode(argp->xdr, argp->taglen);
2342 if (!p)
c44b31c2 2343 return false;
7b723008 2344 argp->tag = svcxdr_savemem(argp, p, argp->taglen);
d9b74bda 2345 if (!argp->tag)
c44b31c2 2346 return false;
d9b74bda
CL		 2347 max_reply += xdr_align_size(argp->taglen);
2348 }
2349
2350 if (xdr_stream_decode_u32(argp->xdr, &argp->minorversion) < 0)
c44b31c2 2351 return false;
d9b74bda 2352 if (xdr_stream_decode_u32(argp->xdr, &argp->opcnt) < 0)
c44b31c2 2353 return false;
d9b74bda 2354
0078117c
BF		 2355 /*
2356 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
2357 * here, so we return success at the xdr level so that
2358 * nfsd4_proc can handle this is an NFS-level error.
2359 */
2360 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
c44b31c2 2361 return true;
1da177e4 2362
e8c96f8c 2363 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
5d6031ca 2364 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1da177e4
LT		 2365 if (!argp->ops) {
2366 argp->ops = argp->iops;
817cb9d4 2367 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
c44b31c2 2368 return false;
1da177e4
LT		 2369 }
2370 }
2371
e1a90ebd 2372 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 2373 argp->opcnt = 0;
2374
1da177e4
LT		 2375 for (i = 0; i < argp->opcnt; i++) {
2376 op = &argp->ops[i];
2377 op->replay = NULL;
2378
3a237b4a 2379 if (xdr_stream_decode_u32(argp->xdr, &op->opnum) < 0)
c44b31c2 2380 return false;
08281341 2381 if (nfsd4_opnum_in_range(argp, op)) {
e1a90ebd 2382 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
08281341
CL		 2383 if (op->status != nfs_ok)
2384 trace_nfsd_compound_decode_err(argp->rqstp,
2385 argp->opcnt, i,
2386 op->opnum,
2387 op->status);
2388 } else {
1da177e4
LT		 2389 op->opnum = OP_ILLEGAL;
2390 op->status = nfserr_op_illegal;
1da177e4 2391 }
f4f9ef4a 2392 op->opdesc = OPDESC(op);
1091006c
BF		 2393 /*
2394 * We'll try to cache the result in the DRC if any one
2395 * op in the compound wants to be cached:
2396 */
2397 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 2398
528b8493 2399 if (op->opnum == OP_READ || op->opnum == OP_READ_PLUS) {
b0e35fda
BF		 2400 readcount++;
2401 readbytes += nfsd4_max_reply(argp->rqstp, op);
2402 } else
2403 max_reply += nfsd4_max_reply(argp->rqstp, op);
f7b43d0c 2404 /*
7323f0d2
KM		 2405 * OP_LOCK and OP_LOCKT may return a conflicting lock.
2406 * (Special case because it will just skip encoding this
2407 * if it runs out of xdr buffer space, and it is the only
2408 * operation that behaves this way.)
f7b43d0c 2409 */
7323f0d2 2410 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
f7b43d0c 2411 max_reply += NFS4_OPAQUE_LIMIT;
e372ba60
BF		 2412
2413 if (op->status) {
2414 argp->opcnt = i+1;
2415 break;
2416 }
1da177e4 2417 }
1091006c
BF		 2418 /* Sessions make the DRC unnecessary: */
2419 if (argp->minorversion)
2420 cachethis = false;
b0e35fda 2421 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 2422 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 2423
a5cddc88 2424 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
779fb0f3 2425 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
b0e35fda 2426
c44b31c2 2427 return true;
1da177e4 2428}
1da177e4 2429
b8800921
N		 2430static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
2431 struct svc_export *exp)
c654b8a9 2432{
b8800921
N		 2433 if (exp->ex_flags & NFSEXP_V4ROOT) {
2434 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
2435 *p++ = 0;
70b87f77 2436 } else
39ca1bf6 2437 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
d05d5744 2438 return p;
c654b8a9
BF		 2439}
2440
16945141
BF		 2441/*
2442 * ctime (in NFSv4, time_metadata) is not writeable, and the client
2443 * doesn't really care what resolution could theoretically be stored by
2444 * the filesystem.
2445 *
2446 * The client cares how close together changes can be while still
2447 * guaranteeing ctime changes. For most filesystems (which have
2448 * timestamps with nanosecond fields) that is limited by the resolution
2449 * of the time returned from current_time() (which I'm assuming to be
2450 * 1/HZ).
2451 */
2452static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
2453{
e4598e38 2454 struct timespec64 ts;
16945141
BF		 2455 u32 ns;
2456
2457 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
e4598e38 2458 ts = ns_to_timespec64(ns);
16945141
BF		 2459
2460 p = xdr_encode_hyper(p, ts.tv_sec);
2461 *p++ = cpu_to_be32(ts.tv_nsec);
2462
2463 return p;
2464}
2465
d05d5744 2466static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 2467{
d05d5744 2468 *p++ = cpu_to_be32(c->atomic);
b2140338
BF		 2469 p = xdr_encode_hyper(p, c->before_change);
2470 p = xdr_encode_hyper(p, c->after_change);
d05d5744 2471 return p;
c654b8a9 2472}
1da177e4 2473
81c3f413 2474/* Encode as an array of strings the string given with components
e7a0444a 2475 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 2476 */
ddd1ea56
BF		 2477static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2478 char *components, char esc_enter,
2479 char esc_exit)
81c3f413 2480{
ddd1ea56 2481 __be32 *p;
082d4bd7
BF		 2482 __be32 pathlen;
2483 int pathlen_offset;
81c3f413 2484 int strlen, count=0;
e7a0444a 2485 char *str, *end, *next;
81c3f413
BF		 2486
2487 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 2488
2489 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 2490 p = xdr_reserve_space(xdr, 4);
2491 if (!p)
81c3f413 2492 return nfserr_resource;
082d4bd7
BF		 2493 p++; /* We will fill this in with @count later */
2494
81c3f413
BF		 2495 end = str = components;
2496 while (*end) {
e7a0444a
WAA		 2497 bool found_esc = false;
2498
2499 /* try to parse as esc_start, ..., esc_end, sep */
2500 if (*str == esc_enter) {
2501 for (; *end && (*end != esc_exit); end++)
2502 /* find esc_exit or end of string */;
2503 next = end + 1;
2504 if (*end && (!*next || *next == sep)) {
2505 str++;
2506 found_esc = true;
2507 }
2508 }
2509
2510 if (!found_esc)
2511 for (; *end && (*end != sep); end++)
2512 /* find sep or end of string */;
2513
81c3f413
BF		 2514 strlen = end - str;
2515 if (strlen) {
ddd1ea56
BF		 2516 p = xdr_reserve_space(xdr, strlen + 4);
2517 if (!p)
81c3f413 2518 return nfserr_resource;
0c0c267b 2519 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 2520 count++;
2521 }
2522 else
2523 end++;
5a64e569
BC		 2524 if (found_esc)
2525 end = next;
2526
81c3f413
BF		 2527 str = end;
2528 }
bf7491f1 2529 pathlen = htonl(count);
082d4bd7 2530 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 2531 return 0;
2532}
2533
e7a0444a
WAA		 2534/* Encode as an array of strings the string given with components
2535 * separated @sep.
2536 */
ddd1ea56
BF		 2537static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2538 char *components)
e7a0444a 2539{
ddd1ea56 2540 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 2541}
2542
81c3f413
BF		 2543/*
2544 * encode a location element of a fs_locations structure
2545 */
ddd1ea56
BF		 2546static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2547 struct nfsd4_fs_location *location)
81c3f413 2548{
b37ad28b 2549 __be32 status;
81c3f413 2550
ddd1ea56 2551 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 2552 '[', ']');
81c3f413
BF		 2553 if (status)
2554 return status;
ddd1ea56 2555 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 2556 if (status)
2557 return status;
81c3f413
BF		 2558 return 0;
2559}
2560
2561/*
ed748aac 2562 * Encode a path in RFC3530 'pathname4' format
81c3f413 2563 */
ddd1ea56
BF		 2564static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2565 const struct path *root,
2566 const struct path *path)
81c3f413 2567{
301f0268 2568 struct path cur = *path;
ddd1ea56 2569 __be32 *p;
ed748aac
TM		 2570 struct dentry **components = NULL;
2571 unsigned int ncomponents = 0;
2572 __be32 err = nfserr_jukebox;
81c3f413 2573
ed748aac 2574 dprintk("nfsd4_encode_components(");
81c3f413 2575
ed748aac
TM		 2576 path_get(&cur);
2577 /* First walk the path up to the nfsd root, and store the
2578 * dentries/path components in an array.
2579 */
2580 for (;;) {
b77a4b2e 2581 if (path_equal(&cur, root))
ed748aac
TM		 2582 break;
2583 if (cur.dentry == cur.mnt->mnt_root) {
2584 if (follow_up(&cur))
2585 continue;
2586 goto out_free;
2587 }
2588 if ((ncomponents & 15) == 0) {
2589 struct dentry **new;
2590 new = krealloc(components,
2591 sizeof(*new) * (ncomponents + 16),
2592 GFP_KERNEL);
2593 if (!new)
2594 goto out_free;
2595 components = new;
2596 }
2597 components[ncomponents++] = cur.dentry;
2598 cur.dentry = dget_parent(cur.dentry);
2599 }
ddd1ea56
BF		 2600 err = nfserr_resource;
2601 p = xdr_reserve_space(xdr, 4);
2602 if (!p)
ed748aac 2603 goto out_free;
c373b0a4 2604 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 2605
2606 while (ncomponents) {
2607 struct dentry *dentry = components[ncomponents - 1];
301f0268 2608 unsigned int len;
ed748aac 2609
301f0268
AV		 2610 spin_lock(&dentry->d_lock);
2611 len = dentry->d_name.len;
ddd1ea56
BF		 2612 p = xdr_reserve_space(xdr, len + 4);
2613 if (!p) {
301f0268 2614 spin_unlock(&dentry->d_lock);
ed748aac 2615 goto out_free;
301f0268 2616 }
0c0c267b 2617 p = xdr_encode_opaque(p, dentry->d_name.name, len);
a455589f 2618 dprintk("/%pd", dentry);
301f0268 2619 spin_unlock(&dentry->d_lock);
ed748aac
TM		 2620 dput(dentry);
2621 ncomponents--;
81c3f413 2622 }
ed748aac 2623
ed748aac
TM		 2624 err = 0;
2625out_free:
2626 dprintk(")\n");
2627 while (ncomponents)
2628 dput(components[--ncomponents]);
2629 kfree(components);
2630 path_put(&cur);
2631 return err;
2632}
2633
ddd1ea56
BF		 2634static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2635 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 2636{
2637 struct svc_export *exp_ps;
2638 __be32 res;
2639
2640 exp_ps = rqst_find_fsidzero_export(rqstp);
2641 if (IS_ERR(exp_ps))
2642 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 2643 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 2644 exp_put(exp_ps);
2645 return res;
81c3f413
BF		 2646}
2647
2648/*
2649 * encode a fs_locations structure
2650 */
ddd1ea56
BF		 2651static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2652 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 2653{
b37ad28b 2654 __be32 status;
cc45f017 2655 int i;
ddd1ea56 2656 __be32 *p;
81c3f413 2657 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 2658
ddd1ea56 2659 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 2660 if (status)
2661 return status;
ddd1ea56
BF		 2662 p = xdr_reserve_space(xdr, 4);
2663 if (!p)
81c3f413 2664 return nfserr_resource;
c373b0a4 2665 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 2666 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 2667 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 2668 if (status)
2669 return status;
2670 }
81c3f413
BF		 2671 return 0;
2672}
1da177e4 2673
3d2544b1
BF		 2674static u32 nfs4_file_type(umode_t mode)
2675{
2676 switch (mode & S_IFMT) {
2677 case S_IFIFO: return NF4FIFO;
2678 case S_IFCHR: return NF4CHR;
2679 case S_IFDIR: return NF4DIR;
2680 case S_IFBLK: return NF4BLK;
2681 case S_IFLNK: return NF4LNK;
2682 case S_IFREG: return NF4REG;
2683 case S_IFSOCK: return NF4SOCK;
2684 default: return NF4BAD;
25fef48b 2685 }
3d2544b1 2686}
1da177e4 2687
b37ad28b 2688static inline __be32
ddd1ea56
BF		 2689nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2690 struct nfs4_ace *ace)
1da177e4 2691{
3554116d 2692 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 2693 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 2694 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 2695 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 2696 else
ddd1ea56 2697 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 2698}
2699
6896f15a 2700static inline __be32
8a4c3926 2701nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
6896f15a 2702{
8a4c3926
JL		 2703 __be32 *p;
2704 unsigned long i = hweight_long(layout_types);
6896f15a 2705
8a4c3926
JL		 2706 p = xdr_reserve_space(xdr, 4 + 4 * i);
2707 if (!p)
2708 return nfserr_resource;
2709
2710 *p++ = cpu_to_be32(i);
2711
2712 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2713 if (layout_types & (1 << i))
2714 *p++ = cpu_to_be32(i);
6896f15a
KM		 2715
2716 return 0;
2717}
2718
42ca0993
BF		 2719#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2720 FATTR4_WORD0_RDATTR_ERROR)
2721#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
c2227a39 2722#define WORD2_ABSENT_FS_ATTRS 0
42ca0993 2723
18032ca0
DQ		 2724#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2725static inline __be32
ddd1ea56
BF		 2726nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2727 void *context, int len)
18032ca0 2728{
ddd1ea56 2729 __be32 *p;
18032ca0 2730
ddd1ea56
BF		 2731 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2732 if (!p)
18032ca0
DQ		 2733 return nfserr_resource;
2734
2735 /*
2736 * For now we use a 0 here to indicate the null translation; in
2737 * the future we may place a call to translation code here.
2738 */
c373b0a4
BF		 2739 *p++ = cpu_to_be32(0); /* lfs */
2740 *p++ = cpu_to_be32(0); /* pi */
18032ca0 2741 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 2742 return 0;
2743}
2744#else
2745static inline __be32
ddd1ea56
BF		 2746nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2747 void *context, int len)
18032ca0
DQ		 2748{ return 0; }
2749#endif
2750
c2227a39 2751static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
42ca0993
BF		 2752{
2753 /* As per referral draft: */
2754 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2755 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2756 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2757 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2758 *rdattr_err = NFSERR_MOVED;
2759 else
2760 return nfserr_moved;
2761 }
2762 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2763 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
c2227a39 2764 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
42ca0993
BF		 2765 return 0;
2766}
1da177e4 2767
ae7095a7
BF		 2768
2769static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2770{
2771 struct path path = exp->ex_path;
2772 int err;
2773
2774 path_get(&path);
2775 while (follow_up(&path)) {
2776 if (path.dentry != path.mnt->mnt_root)
2777 break;
2778 }
a528d35e 2779 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
ae7095a7
BF		 2780 path_put(&path);
2781 return err;
2782}
2783
75976de6
KM		 2784static __be32
2785nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2786{
2787 __be32 *p;
2788
2789 if (bmval2) {
2790 p = xdr_reserve_space(xdr, 16);
2791 if (!p)
2792 goto out_resource;
2793 *p++ = cpu_to_be32(3);
2794 *p++ = cpu_to_be32(bmval0);
2795 *p++ = cpu_to_be32(bmval1);
2796 *p++ = cpu_to_be32(bmval2);
2797 } else if (bmval1) {
2798 p = xdr_reserve_space(xdr, 12);
2799 if (!p)
2800 goto out_resource;
2801 *p++ = cpu_to_be32(2);
2802 *p++ = cpu_to_be32(bmval0);
2803 *p++ = cpu_to_be32(bmval1);
2804 } else {
2805 p = xdr_reserve_space(xdr, 8);
2806 if (!p)
2807 goto out_resource;
2808 *p++ = cpu_to_be32(1);
2809 *p++ = cpu_to_be32(bmval0);
2810 }
2811
2812 return 0;
2813out_resource:
2814 return nfserr_resource;
2815}
2816
1da177e4
LT		 2817/*
2818 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2819 * ourselves.
1da177e4 2820 */
da2ebce6 2821static __be32
d5184658
BF		 2822nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2823 struct svc_export *exp,
2824 struct dentry *dentry, u32 *bmval,
406a7ea9 2825 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2826{
2827 u32 bmval0 = bmval[0];
2828 u32 bmval1 = bmval[1];
7e705706 2829 u32 bmval2 = bmval[2];
1da177e4 2830 struct kstat stat;
d50e6136 2831 struct svc_fh *tempfh = NULL;
1da177e4 2832 struct kstatfs statfs;
ddd1ea56 2833 __be32 *p;
1fcea5b2 2834 int starting_len = xdr->buf->len;
082d4bd7
BF		 2835 int attrlen_offset;
2836 __be32 attrlen;
1da177e4
LT		 2837 u32 dummy;
2838 u64 dummy64;
42ca0993 2839 u32 rdattr_err = 0;
b37ad28b 2840 __be32 status;
b8dd7b9a 2841 int err;
1da177e4 2842 struct nfs4_acl *acl = NULL;
0ab88ca4 2843#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2844 void *context = NULL;
2845 int contextlen;
0ab88ca4 2846#endif
18032ca0 2847 bool contextsupport = false;
7e705706
AA		 2848 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2849 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2850 struct path path = {
2851 .mnt = exp->ex_path.mnt,
2852 .dentry = dentry,
2853 };
3d733711 2854 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2855
2856 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
916d2d84 2857 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
1da177e4 2858
42ca0993 2859 if (exp->ex_fslocs.migrated) {
c2227a39 2860 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
42ca0993
BF		 2861 if (status)
2862 goto out;
2863 }
2864
a528d35e 2865 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
b8dd7b9a 2866 if (err)
1da177e4 2867 goto out_nfserr;
12337901
CH		 2868 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2869 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2870 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2871 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2872 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2873 if (err)
1da177e4
LT		 2874 goto out_nfserr;
2875 }
2876 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2877 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2878 status = nfserr_jukebox;
2879 if (!tempfh)
2880 goto out;
2881 fh_init(tempfh, NFS4_FHSIZE);
2882 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2883 if (status)
2884 goto out;
d50e6136 2885 fhp = tempfh;
1da177e4 2886 }
0c9d65e7 2887 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2888 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
0c9d65e7
AG		 2889 if (err == -EOPNOTSUPP)
2890 bmval0 &= ~FATTR4_WORD0_ACL;
2891 else if (err == -EINVAL) {
2892 status = nfserr_attrnotsupp;
2893 goto out;
2894 } else if (err != 0)
2895 goto out_nfserr;
1da177e4 2896 }
1da177e4 2897
18032ca0 2898#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
c2227a39
KM		 2899 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2900 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
32ddd944
BF		 2901 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2902 err = security_inode_getsecctx(d_inode(dentry),
18032ca0 2903 &context, &contextlen);
32ddd944
BF		 2904 else
2905 err = -EOPNOTSUPP;
18032ca0
DQ		 2906 contextsupport = (err == 0);
2907 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2908 if (err == -EOPNOTSUPP)
2909 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2910 else if (err)
2911 goto out_nfserr;
2912 }
2913 }
2914#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2915
75976de6
KM		 2916 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2917 if (status)
2918 goto out;
082d4bd7
BF		 2919
2920 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2921 p = xdr_reserve_space(xdr, 4);
2922 if (!p)
2923 goto out_resource;
082d4bd7 2924 p++; /* to be backfilled later */
1da177e4
LT		 2925
2926 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
dcd20869
BF		 2927 u32 supp[3];
2928
2929 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
7e705706 2930
0c9d65e7 2931 if (!IS_POSIXACL(dentry->d_inode))
916d2d84 2932 supp[0] &= ~FATTR4_WORD0_ACL;
18032ca0 2933 if (!contextsupport)
916d2d84
BF		 2934 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2935 if (!supp[2]) {
ddd1ea56
BF		 2936 p = xdr_reserve_space(xdr, 12);
2937 if (!p)
2b44f1ba 2938 goto out_resource;
c373b0a4 2939 *p++ = cpu_to_be32(2);
916d2d84
BF		 2940 *p++ = cpu_to_be32(supp[0]);
2941 *p++ = cpu_to_be32(supp[1]);
7e705706 2942 } else {
ddd1ea56
BF		 2943 p = xdr_reserve_space(xdr, 16);
2944 if (!p)
2b44f1ba 2945 goto out_resource;
c373b0a4 2946 *p++ = cpu_to_be32(3);
916d2d84
BF		 2947 *p++ = cpu_to_be32(supp[0]);
2948 *p++ = cpu_to_be32(supp[1]);
2949 *p++ = cpu_to_be32(supp[2]);
7e705706 2950 }
1da177e4
LT		 2951 }
2952 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2953 p = xdr_reserve_space(xdr, 4);
2954 if (!p)
1da177e4 2955 goto out_resource;
3d2544b1 2956 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2957 if (dummy == NF4BAD) {
2958 status = nfserr_serverfault;
2959 goto out;
2960 }
c373b0a4 2961 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2962 }
2963 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2964 p = xdr_reserve_space(xdr, 4);
2965 if (!p)
1da177e4 2966 goto out_resource;
49640001 2967 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2968 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2969 else
c373b0a4
BF		 2970 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2971 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2972 }
2973 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2974 p = xdr_reserve_space(xdr, 8);
2975 if (!p)
1da177e4 2976 goto out_resource;
b8800921 2977 p = encode_change(p, &stat, d_inode(dentry), exp);
1da177e4
LT		 2978 }
2979 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2980 p = xdr_reserve_space(xdr, 8);
2981 if (!p)
1da177e4 2982 goto out_resource;
b64c7f3b 2983 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2984 }
2985 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2986 p = xdr_reserve_space(xdr, 4);
2987 if (!p)
1da177e4 2988 goto out_resource;
c373b0a4 2989 *p++ = cpu_to_be32(1);
1da177e4
LT		 2990 }
2991 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2992 p = xdr_reserve_space(xdr, 4);
2993 if (!p)
1da177e4 2994 goto out_resource;
c373b0a4 2995 *p++ = cpu_to_be32(1);
1da177e4
LT		 2996 }
2997 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2998 p = xdr_reserve_space(xdr, 4);
2999 if (!p)
1da177e4 3000 goto out_resource;
c373b0a4 3001 *p++ = cpu_to_be32(0);
1da177e4
LT		 3002 }
3003 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 3004 p = xdr_reserve_space(xdr, 16);
3005 if (!p)
1da177e4 3006 goto out_resource;
42ca0993 3007 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 3008 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
3009 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 3010 } else switch(fsid_source(fhp)) {
3011 case FSIDSOURCE_FSID:
b64c7f3b
BF		 3012 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
3013 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 3014 break;
3015 case FSIDSOURCE_DEV:
c373b0a4
BF		 3016 *p++ = cpu_to_be32(0);
3017 *p++ = cpu_to_be32(MAJOR(stat.dev));
3018 *p++ = cpu_to_be32(0);
3019 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 3020 break;
3021 case FSIDSOURCE_UUID:
94eb3689
KM		 3022 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
3023 EX_UUID_LEN);
af6a4e28 3024 break;
1da177e4
LT		 3025 }
3026 }
3027 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 3028 p = xdr_reserve_space(xdr, 4);
3029 if (!p)
1da177e4 3030 goto out_resource;
c373b0a4 3031 *p++ = cpu_to_be32(0);
1da177e4
LT		 3032 }
3033 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 3034 p = xdr_reserve_space(xdr, 4);
3035 if (!p)
1da177e4 3036 goto out_resource;
c373b0a4 3037 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 3038 }
3039 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 3040 p = xdr_reserve_space(xdr, 4);
3041 if (!p)
1da177e4 3042 goto out_resource;
c373b0a4 3043 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 3044 }
3045 if (bmval0 & FATTR4_WORD0_ACL) {
3046 struct nfs4_ace *ace;
1da177e4
LT		 3047
3048 if (acl == NULL) {
ddd1ea56
BF		 3049 p = xdr_reserve_space(xdr, 4);
3050 if (!p)
1da177e4
LT		 3051 goto out_resource;
3052
c373b0a4 3053 *p++ = cpu_to_be32(0);
1da177e4
LT		 3054 goto out_acl;
3055 }
ddd1ea56
BF		 3056 p = xdr_reserve_space(xdr, 4);
3057 if (!p)
1da177e4 3058 goto out_resource;
c373b0a4 3059 *p++ = cpu_to_be32(acl->naces);
1da177e4 3060
28e05dd8 3061 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 3062 p = xdr_reserve_space(xdr, 4*3);
3063 if (!p)
1da177e4 3064 goto out_resource;
c373b0a4
BF		 3065 *p++ = cpu_to_be32(ace->type);
3066 *p++ = cpu_to_be32(ace->flag);
3067 *p++ = cpu_to_be32(ace->access_mask &
3068 NFS4_ACE_MASK_ALL);
ddd1ea56 3069 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 3070 if (status)
3071 goto out;
3072 }
3073 }
3074out_acl:
3075 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 3076 p = xdr_reserve_space(xdr, 4);
3077 if (!p)
1da177e4 3078 goto out_resource;
0c9d65e7 3079 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
1da177e4
LT		 3080 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
3081 }
3082 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 3083 p = xdr_reserve_space(xdr, 4);
3084 if (!p)
1da177e4 3085 goto out_resource;
c373b0a4 3086 *p++ = cpu_to_be32(1);
1da177e4
LT		 3087 }
3088 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 3089 p = xdr_reserve_space(xdr, 4);
3090 if (!p)
1da177e4 3091 goto out_resource;
c373b0a4 3092 *p++ = cpu_to_be32(0);
1da177e4
LT		 3093 }
3094 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 3095 p = xdr_reserve_space(xdr, 4);
3096 if (!p)
1da177e4 3097 goto out_resource;
c373b0a4 3098 *p++ = cpu_to_be32(1);
1da177e4
LT		 3099 }
3100 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 3101 p = xdr_reserve_space(xdr, 4);
3102 if (!p)
1da177e4 3103 goto out_resource;
c373b0a4 3104 *p++ = cpu_to_be32(1);
1da177e4
LT		 3105 }
3106 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 3107 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
3108 if (!p)
1da177e4 3109 goto out_resource;
d8b26071 3110 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_raw,
0c0c267b 3111 fhp->fh_handle.fh_size);
1da177e4
LT		 3112 }
3113 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 3114 p = xdr_reserve_space(xdr, 8);
3115 if (!p)
1da177e4 3116 goto out_resource;
b64c7f3b 3117 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 3118 }
3119 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 3120 p = xdr_reserve_space(xdr, 8);
3121 if (!p)
1da177e4 3122 goto out_resource;
b64c7f3b 3123 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 3124 }
3125 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 3126 p = xdr_reserve_space(xdr, 8);
3127 if (!p)
1da177e4 3128 goto out_resource;
b64c7f3b 3129 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 3130 }
3131 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 3132 p = xdr_reserve_space(xdr, 8);
3133 if (!p)
1da177e4 3134 goto out_resource;
b64c7f3b 3135 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 3136 }
81c3f413 3137 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 3138 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 3139 if (status)
3140 goto out;
3141 }
1da177e4 3142 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 3143 p = xdr_reserve_space(xdr, 4);
3144 if (!p)
1da177e4 3145 goto out_resource;
c373b0a4 3146 *p++ = cpu_to_be32(1);
1da177e4
LT		 3147 }
3148 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 3149 p = xdr_reserve_space(xdr, 8);
3150 if (!p)
1da177e4 3151 goto out_resource;
b64c7f3b 3152 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 3153 }
3154 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 3155 p = xdr_reserve_space(xdr, 4);
3156 if (!p)
1da177e4 3157 goto out_resource;
c373b0a4 3158 *p++ = cpu_to_be32(255);
1da177e4
LT		 3159 }
3160 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 3161 p = xdr_reserve_space(xdr, 4);
3162 if (!p)
1da177e4 3163 goto out_resource;
c373b0a4 3164 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 3165 }
3166 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 3167 p = xdr_reserve_space(xdr, 8);
3168 if (!p)
1da177e4 3169 goto out_resource;
b64c7f3b 3170 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 3171 }
3172 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 3173 p = xdr_reserve_space(xdr, 8);
3174 if (!p)
1da177e4 3175 goto out_resource;
b64c7f3b 3176 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 3177 }
3178 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 3179 p = xdr_reserve_space(xdr, 4);
3180 if (!p)
1da177e4 3181 goto out_resource;
c373b0a4 3182 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 3183 }
3184 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 3185 p = xdr_reserve_space(xdr, 4);
3186 if (!p)
1da177e4 3187 goto out_resource;
c373b0a4 3188 *p++ = cpu_to_be32(1);
1da177e4
LT		 3189 }
3190 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 3191 p = xdr_reserve_space(xdr, 4);
3192 if (!p)
1da177e4 3193 goto out_resource;
c373b0a4 3194 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 3195 }
3196 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 3197 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 3198 if (status)
3199 goto out;
3200 }
3201 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 3202 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 3203 if (status)
3204 goto out;
3205 }
3206 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 3207 p = xdr_reserve_space(xdr, 8);
3208 if (!p)
1da177e4 3209 goto out_resource;
c373b0a4
BF		 3210 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
3211 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 3212 }
3213 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 3214 p = xdr_reserve_space(xdr, 8);
3215 if (!p)
1da177e4
LT		 3216 goto out_resource;
3217 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 3218 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3219 }
3220 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 3221 p = xdr_reserve_space(xdr, 8);
3222 if (!p)
1da177e4
LT		 3223 goto out_resource;
3224 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 3225 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3226 }
3227 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 3228 p = xdr_reserve_space(xdr, 8);
3229 if (!p)
1da177e4
LT		 3230 goto out_resource;
3231 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 3232 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3233 }
3234 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 3235 p = xdr_reserve_space(xdr, 8);
3236 if (!p)
1da177e4
LT		 3237 goto out_resource;
3238 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 3239 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3240 }
3241 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 3242 p = xdr_reserve_space(xdr, 12);
3243 if (!p)
1da177e4 3244 goto out_resource;
b64c7f3b 3245 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 3246 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 3247 }
3248 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 3249 p = xdr_reserve_space(xdr, 12);
3250 if (!p)
1da177e4 3251 goto out_resource;
16945141 3252 p = encode_time_delta(p, d_inode(dentry));
1da177e4
LT		 3253 }
3254 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 3255 p = xdr_reserve_space(xdr, 12);
3256 if (!p)
1da177e4 3257 goto out_resource;
b64c7f3b 3258 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 3259 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 3260 }
3261 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 3262 p = xdr_reserve_space(xdr, 12);
3263 if (!p)
1da177e4 3264 goto out_resource;
b64c7f3b 3265 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 3266 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 3267 }
3268 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
0a2050d7
KM		 3269 struct kstat parent_stat;
3270 u64 ino = stat.ino;
3271
ddd1ea56
BF		 3272 p = xdr_reserve_space(xdr, 8);
3273 if (!p)
1da177e4 3274 goto out_resource;
406a7ea9
FF		 3275 /*
3276 * Get parent's attributes if not ignoring crossmount
3277 * and this is the root of a cross-mounted filesystem.
3278 */
3279 if (ignore_crossmnt == 0 &&
0a2050d7
KM		 3280 dentry == exp->ex_path.mnt->mnt_root) {
3281 err = get_parent_attributes(exp, &parent_stat);
3282 if (err)
3283 goto out_nfserr;
3284 ino = parent_stat.ino;
3285 }
3286 p = xdr_encode_hyper(p, ino);
1da177e4 3287 }
9cf514cc 3288#ifdef CONFIG_NFSD_PNFS
6896f15a 3289 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
8a4c3926 3290 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 3291 if (status)
3292 goto out;
3293 }
3294
3295 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
8a4c3926 3296 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 3297 if (status)
3298 goto out;
9cf514cc
CH		 3299 }
3300
3301 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
3302 p = xdr_reserve_space(xdr, 4);
3303 if (!p)
3304 goto out_resource;
3305 *p++ = cpu_to_be32(stat.blksize);
3306 }
3307#endif /* CONFIG_NFSD_PNFS */
8c18f205 3308 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
b26b78cb
TM		 3309 u32 supp[3];
3310
3311 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
3312 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
3313 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
3314 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
3315
3316 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
75976de6
KM		 3317 if (status)
3318 goto out;
8c18f205 3319 }
7e705706 3320
0ab88ca4 3321#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
7d580722
KM		 3322 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
3323 status = nfsd4_encode_security_label(xdr, rqstp, context,
3324 contextlen);
3325 if (status)
3326 goto out;
3327 }
0ab88ca4 3328#endif
7d580722 3329
0e885e84
FL		 3330 if (bmval2 & FATTR4_WORD2_XATTR_SUPPORT) {
3331 p = xdr_reserve_space(xdr, 4);
3332 if (!p)
3333 goto out_resource;
3334 err = xattr_supported_namespace(d_inode(dentry),
3335 XATTR_USER_PREFIX);
3336 *p++ = cpu_to_be32(err == 0);
3337 }
3338
082d4bd7
BF		 3339 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
3340 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 3341 status = nfs_ok;
3342
3343out:
ba4e55bb 3344#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 3345 if (context)
3346 security_release_secctx(context, contextlen);
ba4e55bb 3347#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 3348 kfree(acl);
18df11d0 3349 if (tempfh) {
d50e6136 3350 fh_put(tempfh);
18df11d0
YZ		 3351 kfree(tempfh);
3352 }
1fcea5b2
BF		 3353 if (status)
3354 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3355 return status;
3356out_nfserr:
b8dd7b9a 3357 status = nfserrno(err);
1da177e4
LT		 3358 goto out;
3359out_resource:
1da177e4
LT		 3360 status = nfserr_resource;
3361 goto out;
1da177e4
LT		 3362}
3363
2825a7f9
BF		 3364static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
3365 struct xdr_buf *buf, __be32 *p, int bytes)
3366{
3367 xdr->scratch.iov_len = 0;
3368 memset(buf, 0, sizeof(struct xdr_buf));
3369 buf->head[0].iov_base = p;
3370 buf->head[0].iov_len = 0;
3371 buf->len = 0;
3372 xdr->buf = buf;
3373 xdr->iov = buf->head;
3374 xdr->p = p;
3375 xdr->end = (void *)p + bytes;
3376 buf->buflen = bytes;
3377}
3378
d5184658
BF		 3379__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
3380 struct svc_fh *fhp, struct svc_export *exp,
3381 struct dentry *dentry, u32 *bmval,
3382 struct svc_rqst *rqstp, int ignore_crossmnt)
3383{
2825a7f9 3384 struct xdr_buf dummy;
d5184658
BF		 3385 struct xdr_stream xdr;
3386 __be32 ret;
3387
2825a7f9 3388 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 3389 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
3390 ignore_crossmnt);
3391 *p = xdr.p;
3392 return ret;
3393}
3394
c0ce6ec8
BF		 3395static inline int attributes_need_mount(u32 *bmval)
3396{
3397 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
3398 return 1;
3399 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
3400 return 1;
3401 return 0;
3402}
3403
b37ad28b 3404static __be32
561f0ed4
BF		 3405nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
3406 const char *name, int namlen)
1da177e4
LT		 3407{
3408 struct svc_export *exp = cd->rd_fhp->fh_export;
3409 struct dentry *dentry;
b37ad28b 3410 __be32 nfserr;
406a7ea9 3411 int ignore_crossmnt = 0;
1da177e4 3412
6c2d4798 3413 dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
1da177e4
LT		 3414 if (IS_ERR(dentry))
3415 return nfserrno(PTR_ERR(dentry));
3416
3417 exp_get(exp);
406a7ea9
FF		 3418 /*
3419 * In the case of a mountpoint, the client may be asking for
3420 * attributes that are only properties of the underlying filesystem
3421 * as opposed to the cross-mounted file system. In such a case,
3422 * we will not follow the cross mount and will fill the attribtutes
3423 * directly from the mountpoint dentry.
3424 */
3227fa41 3425 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 3426 int err;
3427
3227fa41
BF		 3428 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3429 && !attributes_need_mount(cd->rd_bmval)) {
3430 ignore_crossmnt = 1;
3431 goto out_encode;
3432 }
dcb488a3
AA		 3433 /*
3434 * Why the heck aren't we just using nfsd_lookup??
3435 * Different "."/".." handling? Something else?
3436 * At least, add a comment here to explain....
3437 */
021d3a72
BF		 3438 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3439 if (err) {
3440 nfserr = nfserrno(err);
1da177e4
LT		 3441 goto out_put;
3442 }
dcb488a3
AA		 3443 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3444 if (nfserr)
3445 goto out_put;
1da177e4
LT		 3446
3447 }
3227fa41 3448out_encode:
561f0ed4 3449 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 3450 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 3451out_put:
3452 dput(dentry);
3453 exp_put(exp);
3454 return nfserr;
3455}
3456
2ebbc012 3457static __be32 *
561f0ed4 3458nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 3459{
561f0ed4
BF		 3460 __be32 *p;
3461
c3a45617 3462 p = xdr_reserve_space(xdr, 20);
561f0ed4 3463 if (!p)
1da177e4
LT		 3464 return NULL;
3465 *p++ = htonl(2);
3466 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
3467 *p++ = htonl(0); /* bmval1 */
3468
87915c64 3469 *p++ = htonl(4); /* attribute length */
1da177e4 3470 *p++ = nfserr; /* no htonl */
1da177e4
LT		 3471 return p;
3472}
3473
3474static int
a0ad13ef
N		 3475nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3476 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 3477{
a0ad13ef 3478 struct readdir_cd *ccd = ccdv;
1da177e4 3479 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 3480 struct xdr_stream *xdr = cd->xdr;
3481 int start_offset = xdr->buf->len;
3482 int cookie_offset;
aee37764 3483 u32 name_and_cookie;
561f0ed4 3484 int entry_bytes;
b37ad28b 3485 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 3486 __be64 wire_offset;
3487 __be32 *p;
1da177e4
LT		 3488
3489 /* In nfsv4, "." and ".." never make it onto the wire.. */
3490 if (name && isdotent(name, namlen)) {
3491 cd->common.err = nfs_ok;
3492 return 0;
3493 }
3494
561f0ed4
BF		 3495 if (cd->cookie_offset) {
3496 wire_offset = cpu_to_be64(offset);
3497 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3498 &wire_offset, 8);
3499 }
1da177e4 3500
561f0ed4
BF		 3501 p = xdr_reserve_space(xdr, 4);
3502 if (!p)
1da177e4 3503 goto fail;
1da177e4 3504 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 3505 cookie_offset = xdr->buf->len;
3506 p = xdr_reserve_space(xdr, 3*4 + namlen);
3507 if (!p)
3508 goto fail;
1da177e4
LT		 3509 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
3510 p = xdr_encode_array(p, name, namlen); /* name length & name */
3511
561f0ed4 3512 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 3513 switch (nfserr) {
3514 case nfs_ok:
1da177e4
LT		 3515 break;
3516 case nfserr_resource:
3517 nfserr = nfserr_toosmall;
3518 goto fail;
b2c0cea6 3519 case nfserr_noent:
f41c5ad2 3520 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 3521 goto skip_entry;
1da177e4
LT		 3522 default:
3523 /*
3524 * If the client requested the RDATTR_ERROR attribute,
3525 * we stuff the error code into this attribute
3526 * and continue. If this attribute was not requested,
3527 * then in accordance with the spec, we fail the
3528 * entire READDIR operation(!)
3529 */
3530 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3531 goto fail;
561f0ed4 3532 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 3533 if (p == NULL) {
3534 nfserr = nfserr_toosmall;
1da177e4 3535 goto fail;
34081efc 3536 }
1da177e4 3537 }
561f0ed4
BF		 3538 nfserr = nfserr_toosmall;
3539 entry_bytes = xdr->buf->len - start_offset;
3540 if (entry_bytes > cd->rd_maxcount)
3541 goto fail;
3542 cd->rd_maxcount -= entry_bytes;
aee37764 3543 /*
f2e717d6
TM		 3544 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", and
3545 * notes that it could be zero. If it is zero, then the server
3546 * should enforce only the rd_maxcount value.
aee37764 3547 */
f2e717d6
TM		 3548 if (cd->rd_dircount) {
3549 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3550 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3551 goto fail;
3552 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3553 if (!cd->rd_dircount)
3554 cd->rd_maxcount = 0;
3555 }
0ec016e3 3556
561f0ed4 3557 cd->cookie_offset = cookie_offset;
b2c0cea6 3558skip_entry:
1da177e4
LT		 3559 cd->common.err = nfs_ok;
3560 return 0;
3561fail:
561f0ed4 3562 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 3563 cd->common.err = nfserr;
3564 return -EINVAL;
3565}
3566
d0a381dd
BF		 3567static __be32
3568nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 3569{
bc749ca4 3570 __be32 *p;
e2f282b9 3571
d0a381dd
BF		 3572 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3573 if (!p)
3574 return nfserr_resource;
c373b0a4 3575 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 3576 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3577 sizeof(stateid_opaque_t));
d0a381dd 3578 return 0;
e2f282b9
BH		 3579}
3580
695e12f8 3581static __be32
b37ad28b 3582nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 3583{
bddfdbcd 3584 struct xdr_stream *xdr = resp->xdr;
bc749ca4 3585 __be32 *p;
1da177e4 3586
bac966d6
BF		 3587 p = xdr_reserve_space(xdr, 8);
3588 if (!p)
3589 return nfserr_resource;
3590 *p++ = cpu_to_be32(access->ac_supported);
3591 *p++ = cpu_to_be32(access->ac_resp_access);
3592 return 0;
1da177e4
LT		 3593}
3594
1d1bc8f2
BF		 3595static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3596{
bddfdbcd 3597 struct xdr_stream *xdr = resp->xdr;
1d1bc8f2
BF		 3598 __be32 *p;
3599
bac966d6
BF		 3600 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3601 if (!p)
3602 return nfserr_resource;
3603 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3604 NFS4_MAX_SESSIONID_LEN);
3605 *p++ = cpu_to_be32(bcts->dir);
3606 /* Upshifting from TCP to RDMA is not supported */
3607 *p++ = cpu_to_be32(0);
3608 return 0;
1d1bc8f2
BF		 3609}
3610
695e12f8 3611static __be32
b37ad28b 3612nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 3613{
bddfdbcd 3614 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3615
bac966d6 3616 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
1da177e4
LT		 3617}
3618
3619
695e12f8 3620static __be32
b37ad28b 3621nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 3622{
bddfdbcd 3623 struct xdr_stream *xdr = resp->xdr;
bc749ca4 3624 __be32 *p;
1da177e4 3625
bac966d6
BF		 3626 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3627 if (!p)
3628 return nfserr_resource;
3629 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
0c0c267b 3630 NFS4_VERIFIER_SIZE);
bac966d6 3631 return 0;
1da177e4
LT		 3632}
3633
695e12f8 3634static __be32
b37ad28b 3635nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 3636{
bddfdbcd 3637 struct xdr_stream *xdr = resp->xdr;
bc749ca4 3638 __be32 *p;
1da177e4 3639
bac966d6
BF		 3640 p = xdr_reserve_space(xdr, 20);
3641 if (!p)
3642 return nfserr_resource;
3643 encode_cinfo(p, &create->cr_cinfo);
b96811cd 3644 return nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
bac966d6 3645 create->cr_bmval[1], create->cr_bmval[2]);
1da177e4
LT		 3646}
3647
b37ad28b
AV		 3648static __be32
3649nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 3650{
3651 struct svc_fh *fhp = getattr->ga_fhp;
bddfdbcd 3652 struct xdr_stream *xdr = resp->xdr;
1da177e4 3653
bac966d6
BF		 3654 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3655 getattr->ga_bmval, resp->rqstp, 0);
1da177e4
LT		 3656}
3657
695e12f8
BH		 3658static __be32
3659nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 3660{
bddfdbcd 3661 struct xdr_stream *xdr = resp->xdr;
695e12f8 3662 struct svc_fh *fhp = *fhpp;
1da177e4 3663 unsigned int len;
bc749ca4 3664 __be32 *p;
1da177e4 3665
bac966d6
BF		 3666 len = fhp->fh_handle.fh_size;
3667 p = xdr_reserve_space(xdr, len + 4);
3668 if (!p)
3669 return nfserr_resource;
d8b26071 3670 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_raw, len);
bac966d6 3671 return 0;
1da177e4
LT		 3672}
3673
3674/*
3675* Including all fields other than the name, a LOCK4denied structure requires
3676* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3677*/
d0a381dd
BF		 3678static __be32
3679nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 3680{
7c13f344 3681 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 3682 __be32 *p;
1da177e4 3683
8c7424cf 3684again:
d0a381dd 3685 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 3686 if (!p) {
3687 /*
3688 * Don't fail to return the result just because we can't
3689 * return the conflicting open:
3690 */
3691 if (conf->len) {
f98bac5a 3692 kfree(conf->data);
8c7424cf
BF		 3693 conf->len = 0;
3694 conf->data = NULL;
3695 goto again;
3696 }
d0a381dd 3697 return nfserr_resource;
8c7424cf 3698 }
b64c7f3b
BF		 3699 p = xdr_encode_hyper(p, ld->ld_start);
3700 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 3701 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 3702 if (conf->len) {
0c0c267b
BF		 3703 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3704 p = xdr_encode_opaque(p, conf->data, conf->len);
f98bac5a 3705 kfree(conf->data);
1da177e4 3706 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 3707 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 3708 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 3709 }
d0a381dd 3710 return nfserr_denied;
1da177e4
LT		 3711}
3712
695e12f8 3713static __be32
b37ad28b 3714nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 3715{
bddfdbcd 3716 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3717
e2f282b9 3718 if (!nfserr)
d0a381dd 3719 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 3720 else if (nfserr == nfserr_denied)
d0a381dd 3721 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
f98bac5a 3722
695e12f8 3723 return nfserr;
1da177e4
LT		 3724}
3725
695e12f8 3726static __be32
b37ad28b 3727nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 3728{
bddfdbcd 3729 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3730
1da177e4 3731 if (nfserr == nfserr_denied)
d0a381dd 3732 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 3733 return nfserr;
1da177e4
LT		 3734}
3735
695e12f8 3736static __be32
b37ad28b 3737nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 3738{
bddfdbcd 3739 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3740
bac966d6 3741 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
1da177e4
LT		 3742}
3743
3744
695e12f8 3745static __be32
b37ad28b 3746nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 3747{
bddfdbcd 3748 struct xdr_stream *xdr = resp->xdr;
bc749ca4 3749 __be32 *p;
1da177e4 3750
bac966d6
BF		 3751 p = xdr_reserve_space(xdr, 20);
3752 if (!p)
3753 return nfserr_resource;
3754 p = encode_cinfo(p, &link->li_cinfo);
3755 return 0;
1da177e4
LT		 3756}
3757
3758
695e12f8 3759static __be32
b37ad28b 3760nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 3761{
bddfdbcd 3762 struct xdr_stream *xdr = resp->xdr;
bc749ca4 3763 __be32 *p;
1da177e4 3764
d0a381dd
BF		 3765 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3766 if (nfserr)
bac966d6 3767 return nfserr;
75976de6 3768 p = xdr_reserve_space(xdr, 24);
d0a381dd
BF		 3769 if (!p)
3770 return nfserr_resource;
d05d5744 3771 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4 3772 *p++ = cpu_to_be32(open->op_rflags);
1da177e4 3773
75976de6
KM		 3774 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3775 open->op_bmval[2]);
3776 if (nfserr)
bac966d6 3777 return nfserr;
75976de6
KM		 3778
3779 p = xdr_reserve_space(xdr, 4);
3780 if (!p)
3781 return nfserr_resource;
3782
3783 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 3784 switch (open->op_delegate_type) {
3785 case NFS4_OPEN_DELEGATE_NONE:
3786 break;
3787 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 3788 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3789 if (nfserr)
3790 return nfserr;
3791 p = xdr_reserve_space(xdr, 20);
3792 if (!p)
3793 return nfserr_resource;
c373b0a4 3794 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 3795
3796 /*
3797 * TODO: ACE's in delegations
3798 */
c373b0a4
BF		 3799 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3800 *p++ = cpu_to_be32(0);
3801 *p++ = cpu_to_be32(0);
3802 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 3803 break;
3804 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 3805 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3806 if (nfserr)
3807 return nfserr;
3808 p = xdr_reserve_space(xdr, 32);
3809 if (!p)
3810 return nfserr_resource;
c373b0a4 3811 *p++ = cpu_to_be32(0);
1da177e4
LT		 3812
3813 /*
3814 * TODO: space_limit's in delegations
3815 */
c373b0a4
BF		 3816 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3817 *p++ = cpu_to_be32(~(u32)0);
3818 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3819
3820 /*
3821 * TODO: ACE's in delegations
3822 */
c373b0a4
BF		 3823 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3824 *p++ = cpu_to_be32(0);
3825 *p++ = cpu_to_be32(0);
3826 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3827 break;
d24433cd
BH		 3828 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3829 switch (open->op_why_no_deleg) {
3830 case WND4_CONTENTION:
3831 case WND4_RESOURCE:
d0a381dd
BF		 3832 p = xdr_reserve_space(xdr, 8);
3833 if (!p)
3834 return nfserr_resource;
c373b0a4
BF		 3835 *p++ = cpu_to_be32(open->op_why_no_deleg);
3836 /* deleg signaling not supported yet: */
3837 *p++ = cpu_to_be32(0);
d24433cd
BH		 3838 break;
3839 default:
d0a381dd
BF		 3840 p = xdr_reserve_space(xdr, 4);
3841 if (!p)
3842 return nfserr_resource;
c373b0a4 3843 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3844 }
d24433cd 3845 break;
1da177e4
LT		 3846 default:
3847 BUG();
3848 }
3849 /* XXX save filehandle here */
bac966d6 3850 return 0;
1da177e4
LT		 3851}
3852
695e12f8 3853static __be32
b37ad28b 3854nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3855{
bddfdbcd 3856 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3857
bac966d6 3858 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4
LT		 3859}
3860
695e12f8 3861static __be32
b37ad28b 3862nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3863{
bddfdbcd 3864 struct xdr_stream *xdr = resp->xdr;
d0a381dd 3865
bac966d6 3866 return nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4
LT		 3867}
3868
dc97618d
BF		 3869static __be32 nfsd4_encode_splice_read(
3870 struct nfsd4_compoundres *resp,
3871 struct nfsd4_read *read,
3872 struct file *file, unsigned long maxcount)
1da177e4 3873{
bddfdbcd 3874 struct xdr_stream *xdr = resp->xdr;
34a78b48 3875 struct xdr_buf *buf = xdr->buf;
76e5492b 3876 int status, space_left;
dc97618d 3877 u32 eof;
dc97618d 3878 __be32 nfserr;
fec25fa4 3879 __be32 *p = xdr->p - 2;
1da177e4 3880
d5d5c304
KM		 3881 /* Make sure there will be room for padding if needed */
3882 if (xdr->end - xdr->p < 1)
d0a381dd 3883 return nfserr_resource;
dc97618d 3884
87c5942e 3885 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
83a63072 3886 file, read->rd_offset, &maxcount, &eof);
87c5942e 3887 read->rd_length = maxcount;
76e5492b
CL		 3888 if (nfserr)
3889 goto out_err;
3890 status = svc_encode_result_payload(read->rd_rqstp,
3891 buf->head[0].iov_len, maxcount);
3892 if (status) {
3893 nfserr = nfserrno(status);
3894 goto out_err;
b0e35fda 3895 }
1da177e4 3896
fec25fa4
BF		 3897 *(p++) = htonl(eof);
3898 *(p++) = htonl(maxcount);
dc97618d 3899
34a78b48
BF		 3900 buf->page_len = maxcount;
3901 buf->len += maxcount;
15b23ef5
BF		 3902 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3903 / PAGE_SIZE;
dc97618d
BF		 3904
3905 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3906 buf->tail[0].iov_base = xdr->p;
3907 buf->tail[0].iov_len = 0;
fec25fa4 3908 xdr->iov = buf->tail;
dc97618d 3909 if (maxcount&3) {
fec25fa4
BF		 3910 int pad = 4 - (maxcount&3);
3911
3912 *(xdr->p++) = 0;
3913
34a78b48 3914 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3915 buf->tail[0].iov_len = pad;
3916 buf->len += pad;
b0e35fda 3917 }
2825a7f9 3918
dc97618d 3919 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3920 buf->buflen - buf->len);
3921 buf->buflen = buf->len + space_left;
dc97618d
BF		 3922 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3923
3924 return 0;
76e5492b
CL		 3925
3926out_err:
3927 /*
3928 * nfsd_splice_actor may have already messed with the
3929 * page length; reset it so as not to confuse
3930 * xdr_truncate_encode in our caller.
3931 */
3932 buf->page_len = 0;
3933 return nfserr;
dc97618d
BF		 3934}
3935
3936static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3937 struct nfsd4_read *read,
3938 struct file *file, unsigned long maxcount)
3939{
bddfdbcd 3940 struct xdr_stream *xdr = resp->xdr;
dc97618d 3941 u32 eof;
dc97618d 3942 int starting_len = xdr->buf->len - 8;
dc97618d
BF		 3943 __be32 nfserr;
3944 __be32 tmp;
b0420980 3945 int pad;
1da177e4 3946
403217f3
AS		 3947 read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, maxcount);
3948 if (read->rd_vlen < 0)
3949 return nfserr_resource;
1da177e4 3950
87c5942e 3951 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
83a63072
TM		 3952 resp->rqstp->rq_vec, read->rd_vlen, &maxcount,
3953 &eof);
87c5942e 3954 read->rd_length = maxcount;
dc97618d 3955 if (nfserr)
1da177e4 3956 return nfserr;
03493bca 3957 if (svc_encode_result_payload(resp->rqstp, starting_len + 8, maxcount))
41205539 3958 return nfserr_io;
7dcf4ab9 3959 xdr_truncate_encode(xdr, starting_len + 8 + xdr_align_size(maxcount));
dc97618d 3960
dc97618d
BF		 3961 tmp = htonl(eof);
3962 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3963 tmp = htonl(maxcount);
3964 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3965
7dcf4ab9 3966 tmp = xdr_zero;
b0420980
BF		 3967 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3968 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
7dcf4ab9 3969 &tmp, pad);
1da177e4 3970 return 0;
dc97618d
BF		 3971
3972}
3973
3974static __be32
3975nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3976 struct nfsd4_read *read)
3977{
3978 unsigned long maxcount;
bddfdbcd 3979 struct xdr_stream *xdr = resp->xdr;
5c4583b2 3980 struct file *file;
dc97618d 3981 int starting_len = xdr->buf->len;
dc97618d 3982 __be32 *p;
dc97618d 3983
5c4583b2
JL		 3984 if (nfserr)
3985 return nfserr;
3986 file = read->rd_nf->nf_file;
3987
dc97618d
BF		 3988 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3989 if (!p) {
779fb0f3 3990 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
bac966d6 3991 return nfserr_resource;
dc97618d 3992 }
bddfdbcd 3993 if (resp->xdr->buf->page_len &&
68e8bb03 3994 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
b0420980 3995 WARN_ON_ONCE(1);
bac966d6 3996 return nfserr_resource;
dc97618d 3997 }
dc97618d
BF		 3998 xdr_commit_encode(xdr);
3999
4000 maxcount = svc_max_payload(resp->rqstp);
68e8bb03
CH		 4001 maxcount = min_t(unsigned long, maxcount,
4002 (xdr->buf->buflen - xdr->buf->len));
3c7aa15d 4003 maxcount = min_t(unsigned long, maxcount, read->rd_length);
dc97618d 4004
68e8bb03
CH		 4005 if (file->f_op->splice_read &&
4006 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
96bcad50 4007 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
dc97618d 4008 else
96bcad50 4009 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
dc97618d 4010
96bcad50 4011 if (nfserr)
dc97618d 4012 xdr_truncate_encode(xdr, starting_len);
96bcad50 4013
96bcad50 4014 return nfserr;
1da177e4
LT		 4015}
4016
b37ad28b
AV		 4017static __be32
4018nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 4019{
4020 int maxcount;
476a7b1f
BF		 4021 __be32 wire_count;
4022 int zero = 0;
bddfdbcd 4023 struct xdr_stream *xdr = resp->xdr;
1fcea5b2 4024 int length_offset = xdr->buf->len;
76e5492b 4025 int status;
bc749ca4 4026 __be32 *p;
1da177e4 4027
2825a7f9
BF		 4028 p = xdr_reserve_space(xdr, 4);
4029 if (!p)
4030 return nfserr_resource;
1da177e4 4031 maxcount = PAGE_SIZE;
d0a381dd 4032
476a7b1f
BF		 4033 p = xdr_reserve_space(xdr, maxcount);
4034 if (!p)
4e21ac4b 4035 return nfserr_resource;
1da177e4 4036 /*
fd4a0edf
MS		 4037 * XXX: By default, vfs_readlink() will truncate symlinks if they
4038 * would overflow the buffer. Is this kosher in NFSv4? If not, one
4039 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
4040 * that truncation occurred, and return NFS4ERR_RESOURCE.
1da177e4 4041 */
476a7b1f
BF		 4042 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
4043 (char *)p, &maxcount);
1da177e4 4044 if (nfserr == nfserr_isdir)
d3f627c8 4045 nfserr = nfserr_inval;
76e5492b
CL		 4046 if (nfserr)
4047 goto out_err;
4048 status = svc_encode_result_payload(readlink->rl_rqstp, length_offset,
4049 maxcount);
4050 if (status) {
4051 nfserr = nfserrno(status);
4052 goto out_err;
d3f627c8 4053 }
1da177e4 4054
476a7b1f
BF		 4055 wire_count = htonl(maxcount);
4056 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
69bbd9c7 4057 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
476a7b1f
BF		 4058 if (maxcount & 3)
4059 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
4060 &zero, 4 - (maxcount&3));
1da177e4 4061 return 0;
76e5492b
CL		 4062
4063out_err:
4064 xdr_truncate_encode(xdr, length_offset);
4065 return nfserr;
1da177e4
LT		 4066}
4067
b37ad28b
AV		 4068static __be32
4069nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 4070{
4071 int maxcount;
561f0ed4 4072 int bytes_left;
1da177e4 4073 loff_t offset;
561f0ed4 4074 __be64 wire_offset;
bddfdbcd 4075 struct xdr_stream *xdr = resp->xdr;
1fcea5b2 4076 int starting_len = xdr->buf->len;
bc749ca4 4077 __be32 *p;
1da177e4 4078
d0a381dd
BF		 4079 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
4080 if (!p)
4081 return nfserr_resource;
1da177e4
LT		 4082
4083 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 4084 *p++ = cpu_to_be32(0);
4085 *p++ = cpu_to_be32(0);
bddfdbcd
CL		 4086 xdr->buf->head[0].iov_len = (char *)xdr->p -
4087 (char *)xdr->buf->head[0].iov_base;
1da177e4
LT		 4088
4089 /*
561f0ed4
BF		 4090 * Number of bytes left for directory entries allowing for the
4091 * final 8 bytes of the readdir and a following failed op:
4092 */
4093 bytes_left = xdr->buf->buflen - xdr->buf->len
4094 - COMPOUND_ERR_SLACK_SPACE - 8;
4095 if (bytes_left < 0) {
4096 nfserr = nfserr_resource;
4097 goto err_no_verf;
4098 }
9c2ece6e
SM		 4099 maxcount = svc_max_payload(resp->rqstp);
4100 maxcount = min_t(u32, readdir->rd_maxcount, maxcount);
561f0ed4
BF		 4101 /*
4102 * Note the rfc defines rd_maxcount as the size of the
4103 * READDIR4resok structure, which includes the verifier above
4104 * and the 8 bytes encoded at the end of this function:
1da177e4 4105 */
561f0ed4
BF		 4106 if (maxcount < 16) {
4107 nfserr = nfserr_toosmall;
1da177e4
LT		 4108 goto err_no_verf;
4109 }
561f0ed4 4110 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 4111
aee37764
BF		 4112 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
4113 if (!readdir->rd_dircount)
9c2ece6e 4114 readdir->rd_dircount = svc_max_payload(resp->rqstp);
aee37764 4115
561f0ed4
BF		 4116 readdir->xdr = xdr;
4117 readdir->rd_maxcount = maxcount;
1da177e4 4118 readdir->common.err = 0;
561f0ed4 4119 readdir->cookie_offset = 0;
1da177e4
LT		 4120
4121 offset = readdir->rd_cookie;
4122 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
4123 &offset,
4124 &readdir->common, nfsd4_encode_dirent);
4125 if (nfserr == nfs_ok &&
4126 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 4127 xdr->buf->len == starting_len + 8) {
4128 /* nothing encoded; which limit did we hit?: */
4129 if (maxcount - 16 < bytes_left)
4130 /* It was the fault of rd_maxcount: */
4131 nfserr = nfserr_toosmall;
4132 else
4133 /* We ran out of buffer space: */
4134 nfserr = nfserr_resource;
4135 }
1da177e4
LT		 4136 if (nfserr)
4137 goto err_no_verf;
4138
561f0ed4
BF		 4139 if (readdir->cookie_offset) {
4140 wire_offset = cpu_to_be64(offset);
4141 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
4142 &wire_offset, 8);
4143 }
1da177e4 4144
561f0ed4
BF		 4145 p = xdr_reserve_space(xdr, 8);
4146 if (!p) {
4147 WARN_ON_ONCE(1);
4148 goto err_no_verf;
4149 }
1da177e4
LT		 4150 *p++ = 0; /* no more entries */
4151 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 4152
4153 return 0;
4154err_no_verf:
1fcea5b2 4155 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 4156 return nfserr;
4157}
4158
695e12f8 4159static __be32
b37ad28b 4160nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 4161{
bddfdbcd 4162 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4163 __be32 *p;
1da177e4 4164
bac966d6
BF		 4165 p = xdr_reserve_space(xdr, 20);
4166 if (!p)
4167 return nfserr_resource;
4168 p = encode_cinfo(p, &remove->rm_cinfo);
4169 return 0;
1da177e4
LT		 4170}
4171
695e12f8 4172static __be32
b37ad28b 4173nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 4174{
bddfdbcd 4175 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4176 __be32 *p;
1da177e4 4177
bac966d6
BF		 4178 p = xdr_reserve_space(xdr, 40);
4179 if (!p)
4180 return nfserr_resource;
4181 p = encode_cinfo(p, &rename->rn_sinfo);
4182 p = encode_cinfo(p, &rename->rn_tinfo);
4183 return 0;
1da177e4
LT		 4184}
4185
695e12f8 4186static __be32
bac966d6 4187nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
dcb488a3 4188{
676e4ebd 4189 u32 i, nflavs, supported;
4796f457
BF		 4190 struct exp_flavor_info *flavs;
4191 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 4192 __be32 *p, *flavorsp;
4193 static bool report = true;
dcb488a3 4194
4796f457
BF		 4195 if (exp->ex_nflavors) {
4196 flavs = exp->ex_flavors;
4197 nflavs = exp->ex_nflavors;
4198 } else { /* Handling of some defaults in absence of real secinfo: */
4199 flavs = def_flavs;
4200 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
4201 nflavs = 2;
4202 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
4203 flavs[1].pseudoflavor = RPC_AUTH_NULL;
4204 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
4205 nflavs = 1;
4206 flavs[0].pseudoflavor
4207 = svcauth_gss_flavor(exp->ex_client);
4208 } else {
4209 nflavs = 1;
4210 flavs[0].pseudoflavor
4211 = exp->ex_client->flavour->flavour;
4212 }
4213 }
4214
676e4ebd 4215 supported = 0;
d0a381dd
BF		 4216 p = xdr_reserve_space(xdr, 4);
4217 if (!p)
bac966d6 4218 return nfserr_resource;
676e4ebd 4219 flavorsp = p++; /* to be backfilled later */
676e4ebd 4220
4796f457 4221 for (i = 0; i < nflavs; i++) {
676e4ebd 4222 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 4223 struct rpcsec_gss_info info;
dcb488a3 4224
676e4ebd
CL		 4225 if (rpcauth_get_gssinfo(pf, &info) == 0) {
4226 supported++;
d0a381dd
BF		 4227 p = xdr_reserve_space(xdr, 4 + 4 +
4228 XDR_LEN(info.oid.len) + 4 + 4);
4229 if (!p)
bac966d6 4230 return nfserr_resource;
c373b0a4 4231 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 4232 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 4233 *p++ = cpu_to_be32(info.qop);
4234 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 4235 } else if (pf < RPC_AUTH_MAXFLAVOR) {
4236 supported++;
d0a381dd
BF		 4237 p = xdr_reserve_space(xdr, 4);
4238 if (!p)
bac966d6 4239 return nfserr_resource;
c373b0a4 4240 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 4241 } else {
4242 if (report)
4243 pr_warn("NFS: SECINFO: security flavor %u "
4244 "is not supported\n", pf);
dcb488a3
AA		 4245 }
4246 }
a77c806f 4247
676e4ebd
CL		 4248 if (nflavs != supported)
4249 report = false;
4250 *flavorsp = htonl(supported);
bac966d6 4251 return 0;
dcb488a3
AA		 4252}
4253
22b6dee8
MJ		 4254static __be32
4255nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4256 struct nfsd4_secinfo *secinfo)
4257{
bddfdbcd 4258 struct xdr_stream *xdr = resp->xdr;
d0a381dd 4259
bac966d6 4260 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
22b6dee8
MJ		 4261}
4262
4263static __be32
4264nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
4265 struct nfsd4_secinfo_no_name *secinfo)
4266{
bddfdbcd 4267 struct xdr_stream *xdr = resp->xdr;
d0a381dd 4268
bac966d6 4269 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
22b6dee8
MJ		 4270}
4271
1da177e4
LT		 4272/*
4273 * The SETATTR encode routine is special -- it always encodes a bitmap,
4274 * regardless of the error status.
4275 */
695e12f8 4276static __be32
b37ad28b 4277nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 4278{
bddfdbcd 4279 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4280 __be32 *p;
1da177e4 4281
d0a381dd
BF		 4282 p = xdr_reserve_space(xdr, 16);
4283 if (!p)
4284 return nfserr_resource;
1da177e4 4285 if (nfserr) {
c373b0a4
BF		 4286 *p++ = cpu_to_be32(3);
4287 *p++ = cpu_to_be32(0);
4288 *p++ = cpu_to_be32(0);
4289 *p++ = cpu_to_be32(0);
1da177e4
LT		 4290 }
4291 else {
c373b0a4
BF		 4292 *p++ = cpu_to_be32(3);
4293 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
4294 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
4295 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 4296 }
695e12f8 4297 return nfserr;
1da177e4
LT		 4298}
4299
695e12f8 4300static __be32
b37ad28b 4301nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 4302{
bddfdbcd 4303 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4304 __be32 *p;
1da177e4
LT		 4305
4306 if (!nfserr) {
d0a381dd
BF		 4307 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
4308 if (!p)
4309 return nfserr_resource;
0c0c267b
BF		 4310 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
4311 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
4312 NFS4_VERIFIER_SIZE);
1da177e4
LT		 4313 }
4314 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 4315 p = xdr_reserve_space(xdr, 8);
4316 if (!p)
4317 return nfserr_resource;
c373b0a4
BF		 4318 *p++ = cpu_to_be32(0);
4319 *p++ = cpu_to_be32(0);
1da177e4 4320 }
695e12f8 4321 return nfserr;
1da177e4
LT		 4322}
4323
695e12f8 4324static __be32
b37ad28b 4325nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 4326{
bddfdbcd 4327 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4328 __be32 *p;
1da177e4 4329
bac966d6
BF		 4330 p = xdr_reserve_space(xdr, 16);
4331 if (!p)
4332 return nfserr_resource;
4333 *p++ = cpu_to_be32(write->wr_bytes_written);
4334 *p++ = cpu_to_be32(write->wr_how_written);
4335 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4336 NFS4_VERIFIER_SIZE);
4337 return 0;
1da177e4
LT		 4338}
4339
2db134eb 4340static __be32
57b7b43b 4341nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4342 struct nfsd4_exchange_id *exid)
4343{
bddfdbcd 4344 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4345 __be32 *p;
0733d213
AA		 4346 char *major_id;
4347 char *server_scope;
4348 int major_id_sz;
4349 int server_scope_sz;
4350 uint64_t minor_id = 0;
7627d7dc 4351 struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id);
0733d213 4352
7627d7dc
SM		 4353 major_id = nn->nfsd_name;
4354 major_id_sz = strlen(nn->nfsd_name);
4355 server_scope = nn->nfsd_name;
4356 server_scope_sz = strlen(nn->nfsd_name);
0733d213 4357
d0a381dd 4358 p = xdr_reserve_space(xdr,
0733d213
AA		 4359 8 /* eir_clientid */ +
4360 4 /* eir_sequenceid */ +
4361 4 /* eir_flags */ +
a8bb84bc 4362 4 /* spr_how */);
d0a381dd
BF		 4363 if (!p)
4364 return nfserr_resource;
0733d213 4365
0c0c267b 4366 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 4367 *p++ = cpu_to_be32(exid->seqid);
4368 *p++ = cpu_to_be32(exid->flags);
0733d213 4369
c373b0a4 4370 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 4371
57266a6e
BF		 4372 switch (exid->spa_how) {
4373 case SP4_NONE:
4374 break;
4375 case SP4_MACH_CRED:
4376 /* spo_must_enforce bitmap: */
bac966d6 4377 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 4378 exid->spo_must_enforce[0],
4379 exid->spo_must_enforce[1],
4380 exid->spo_must_enforce[2]);
bac966d6
BF		 4381 if (nfserr)
4382 return nfserr;
ed941643 4383 /* spo_must_allow bitmap: */
bac966d6 4384 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 4385 exid->spo_must_allow[0],
4386 exid->spo_must_allow[1],
4387 exid->spo_must_allow[2]);
bac966d6
BF		 4388 if (nfserr)
4389 return nfserr;
57266a6e
BF		 4390 break;
4391 default:
4392 WARN_ON_ONCE(1);
4393 }
0733d213 4394
d0a381dd 4395 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 4396 8 /* so_minor_id */ +
4397 4 /* so_major_id.len */ +
4398 (XDR_QUADLEN(major_id_sz) * 4) +
4399 4 /* eir_server_scope.len */ +
4400 (XDR_QUADLEN(server_scope_sz) * 4) +
4401 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 4402 if (!p)
4403 return nfserr_resource;
a8bb84bc 4404
0733d213 4405 /* The server_owner struct */
b64c7f3b 4406 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 4407 /* major id */
0c0c267b 4408 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 4409
4410 /* Server scope */
0c0c267b 4411 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 4412
4413 /* Implementation id */
c373b0a4 4414 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 4415 return 0;
2db134eb
AA		 4416}
4417
4418static __be32
57b7b43b 4419nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4420 struct nfsd4_create_session *sess)
4421{
bddfdbcd 4422 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4423 __be32 *p;
ec6b5d7b 4424
d0a381dd
BF		 4425 p = xdr_reserve_space(xdr, 24);
4426 if (!p)
4427 return nfserr_resource;
0c0c267b
BF		 4428 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4429 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4430 *p++ = cpu_to_be32(sess->seqid);
4431 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 4432
d0a381dd
BF		 4433 p = xdr_reserve_space(xdr, 28);
4434 if (!p)
4435 return nfserr_resource;
c373b0a4
BF		 4436 *p++ = cpu_to_be32(0); /* headerpadsz */
4437 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4438 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4439 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4440 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4441 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4442 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4443
4444 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 4445 p = xdr_reserve_space(xdr, 4);
4446 if (!p)
4447 return nfserr_resource;
c373b0a4 4448 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 4449 }
4450
d0a381dd
BF		 4451 p = xdr_reserve_space(xdr, 28);
4452 if (!p)
4453 return nfserr_resource;
c373b0a4
BF		 4454 *p++ = cpu_to_be32(0); /* headerpadsz */
4455 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4456 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4457 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4458 *p++ = cpu_to_be32(sess->back_channel.maxops);
4459 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4460 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4461
4462 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 4463 p = xdr_reserve_space(xdr, 4);
4464 if (!p)
4465 return nfserr_resource;
c373b0a4 4466 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 4467 }
4468 return 0;
2db134eb
AA		 4469}
4470
c47d832b 4471static __be32
57b7b43b 4472nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4473 struct nfsd4_sequence *seq)
4474{
bddfdbcd 4475 struct xdr_stream *xdr = resp->xdr;
bc749ca4 4476 __be32 *p;
b85d4c01 4477
d0a381dd
BF		 4478 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4479 if (!p)
4480 return nfserr_resource;
0c0c267b
BF		 4481 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4482 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4483 *p++ = cpu_to_be32(seq->seqid);
4484 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 4485 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 4486 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4487 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4488 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 4489
f5236013 4490 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 4491 return 0;
2db134eb
AA		 4492}
4493
2355c596 4494static __be32
57b7b43b 4495nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 4496 struct nfsd4_test_stateid *test_stateid)
4497{
bddfdbcd 4498 struct xdr_stream *xdr = resp->xdr;
03cfb420 4499 struct nfsd4_test_stateid_id *stateid, *next;
17456804 4500 __be32 *p;
17456804 4501
d0a381dd
BF		 4502 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4503 if (!p)
4504 return nfserr_resource;
17456804 4505 *p++ = htonl(test_stateid->ts_num_ids);
17456804 4506
03cfb420 4507 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 4508 *p++ = stateid->ts_id_status;
17456804 4509 }
17456804 4510
bac966d6 4511 return 0;
17456804
BS		 4512}
4513
9cf514cc
CH		 4514#ifdef CONFIG_NFSD_PNFS
4515static __be32
4516nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4517 struct nfsd4_getdeviceinfo *gdev)
4518{
bddfdbcd 4519 struct xdr_stream *xdr = resp->xdr;
f961e3f2 4520 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4521 u32 starting_len = xdr->buf->len, needed_len;
4522 __be32 *p;
4523
9cf514cc
CH		 4524 p = xdr_reserve_space(xdr, 4);
4525 if (!p)
bac966d6 4526 return nfserr_resource;
9cf514cc
CH		 4527
4528 *p++ = cpu_to_be32(gdev->gd_layout_type);
4529
4530 /* If maxcount is 0 then just update notifications */
4531 if (gdev->gd_maxcount != 0) {
f961e3f2 4532 ops = nfsd4_layout_ops[gdev->gd_layout_type];
9cf514cc
CH		 4533 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4534 if (nfserr) {
4535 /*
4536 * We don't bother to burden the layout drivers with
4537 * enforcing gd_maxcount, just tell the client to
4538 * come back with a bigger buffer if it's not enough.
4539 */
4540 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4541 goto toosmall;
bac966d6 4542 return nfserr;
9cf514cc
CH		 4543 }
4544 }
4545
9cf514cc
CH		 4546 if (gdev->gd_notify_types) {
4547 p = xdr_reserve_space(xdr, 4 + 4);
4548 if (!p)
bac966d6 4549 return nfserr_resource;
9cf514cc
CH		 4550 *p++ = cpu_to_be32(1); /* bitmap length */
4551 *p++ = cpu_to_be32(gdev->gd_notify_types);
4552 } else {
4553 p = xdr_reserve_space(xdr, 4);
4554 if (!p)
bac966d6 4555 return nfserr_resource;
9cf514cc
CH		 4556 *p++ = 0;
4557 }
4558
bac966d6 4559 return 0;
9cf514cc
CH		 4560toosmall:
4561 dprintk("%s: maxcount too small\n", __func__);
4562 needed_len = xdr->buf->len + 4 /* notifications */;
4563 xdr_truncate_encode(xdr, starting_len);
4564 p = xdr_reserve_space(xdr, 4);
bac966d6
BF		 4565 if (!p)
4566 return nfserr_resource;
4567 *p++ = cpu_to_be32(needed_len);
4568 return nfserr_toosmall;
9cf514cc
CH		 4569}
4570
4571static __be32
4572nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4573 struct nfsd4_layoutget *lgp)
4574{
bddfdbcd 4575 struct xdr_stream *xdr = resp->xdr;
f961e3f2 4576 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4577 __be32 *p;
4578
9cf514cc
CH		 4579 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4580 if (!p)
bac966d6 4581 return nfserr_resource;
9cf514cc
CH		 4582
4583 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4584 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4585 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4586 sizeof(stateid_opaque_t));
4587
4588 *p++ = cpu_to_be32(1); /* we always return a single layout */
4589 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4590 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4591 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4592 *p++ = cpu_to_be32(lgp->lg_layout_type);
4593
f961e3f2 4594 ops = nfsd4_layout_ops[lgp->lg_layout_type];
bac966d6 4595 return ops->encode_layoutget(xdr, lgp);
9cf514cc
CH		 4596}
4597
4598static __be32
4599nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4600 struct nfsd4_layoutcommit *lcp)
4601{
bddfdbcd 4602 struct xdr_stream *xdr = resp->xdr;
9cf514cc
CH		 4603 __be32 *p;
4604
9cf514cc
CH		 4605 p = xdr_reserve_space(xdr, 4);
4606 if (!p)
4607 return nfserr_resource;
4608 *p++ = cpu_to_be32(lcp->lc_size_chg);
4609 if (lcp->lc_size_chg) {
4610 p = xdr_reserve_space(xdr, 8);
4611 if (!p)
4612 return nfserr_resource;
4613 p = xdr_encode_hyper(p, lcp->lc_newsize);
4614 }
4615
bac966d6 4616 return 0;
9cf514cc
CH		 4617}
4618
4619static __be32
4620nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4621 struct nfsd4_layoutreturn *lrp)
4622{
bddfdbcd 4623 struct xdr_stream *xdr = resp->xdr;
9cf514cc
CH		 4624 __be32 *p;
4625
9cf514cc
CH		 4626 p = xdr_reserve_space(xdr, 4);
4627 if (!p)
4628 return nfserr_resource;
4629 *p++ = cpu_to_be32(lrp->lrs_present);
4630 if (lrp->lrs_present)
376675da 4631 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
bac966d6 4632 return 0;
9cf514cc
CH		 4633}
4634#endif /* CONFIG_NFSD_PNFS */
4635
29ae7f9d 4636static __be32
e0639dc5
OK		 4637nfsd42_encode_write_res(struct nfsd4_compoundres *resp,
4638 struct nfsd42_write_res *write, bool sync)
29ae7f9d
AS		 4639{
4640 __be32 *p;
bddfdbcd 4641 p = xdr_reserve_space(resp->xdr, 4);
e0639dc5
OK		 4642 if (!p)
4643 return nfserr_resource;
29ae7f9d 4644
e0639dc5
OK		 4645 if (sync)
4646 *p++ = cpu_to_be32(0);
4647 else {
4648 __be32 nfserr;
4649 *p++ = cpu_to_be32(1);
bddfdbcd 4650 nfserr = nfsd4_encode_stateid(resp->xdr, &write->cb_stateid);
e0639dc5
OK		 4651 if (nfserr)
4652 return nfserr;
4653 }
bddfdbcd 4654 p = xdr_reserve_space(resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE);
29ae7f9d
AS		 4655 if (!p)
4656 return nfserr_resource;
4657
29ae7f9d
AS		 4658 p = xdr_encode_hyper(p, write->wr_bytes_written);
4659 *p++ = cpu_to_be32(write->wr_stable_how);
4660 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4661 NFS4_VERIFIER_SIZE);
4662 return nfs_ok;
4663}
4664
51911868
OK		 4665static __be32
4666nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns)
4667{
bddfdbcd 4668 struct xdr_stream *xdr = resp->xdr;
51911868
OK		 4669 struct nfs42_netaddr *addr;
4670 __be32 *p;
4671
4672 p = xdr_reserve_space(xdr, 4);
4673 *p++ = cpu_to_be32(ns->nl4_type);
4674
4675 switch (ns->nl4_type) {
4676 case NL4_NETADDR:
4677 addr = &ns->u.nl4_addr;
4678
4679 /* netid_len, netid, uaddr_len, uaddr (port included
4680 * in RPCBIND_MAXUADDRLEN)
4681 */
4682 p = xdr_reserve_space(xdr,
4683 4 /* netid len */ +
4684 (XDR_QUADLEN(addr->netid_len) * 4) +
4685 4 /* uaddr len */ +
4686 (XDR_QUADLEN(addr->addr_len) * 4));
4687 if (!p)
4688 return nfserr_resource;
4689
4690 *p++ = cpu_to_be32(addr->netid_len);
4691 p = xdr_encode_opaque_fixed(p, addr->netid,
4692 addr->netid_len);
4693 *p++ = cpu_to_be32(addr->addr_len);
4694 p = xdr_encode_opaque_fixed(p, addr->addr,
4695 addr->addr_len);
4696 break;
4697 default:
4698 WARN_ON_ONCE(ns->nl4_type != NL4_NETADDR);
4699 return nfserr_inval;
4700 }
4701
4702 return 0;
4703}
4704
29ae7f9d
AS		 4705static __be32
4706nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4707 struct nfsd4_copy *copy)
4708{
4709 __be32 *p;
4710
e0639dc5 4711 nfserr = nfsd42_encode_write_res(resp, &copy->cp_res,
e8febea7 4712 !!copy->cp_synchronous);
bac966d6
BF		 4713 if (nfserr)
4714 return nfserr;
29ae7f9d 4715
bddfdbcd 4716 p = xdr_reserve_space(resp->xdr, 4 + 4);
edcc8452 4717 *p++ = xdr_one; /* cr_consecutive */
bac966d6
BF		 4718 *p++ = cpu_to_be32(copy->cp_synchronous);
4719 return 0;
29ae7f9d
AS		 4720}
4721
6308bc98
OK		 4722static __be32
4723nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
4724 struct nfsd4_offload_status *os)
4725{
bddfdbcd 4726 struct xdr_stream *xdr = resp->xdr;
6308bc98
OK		 4727 __be32 *p;
4728
4729 p = xdr_reserve_space(xdr, 8 + 4);
4730 if (!p)
4731 return nfserr_resource;
4732 p = xdr_encode_hyper(p, os->count);
4733 *p++ = cpu_to_be32(0);
528b8493
AS		 4734 return nfserr;
4735}
4736
4737static __be32
4738nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp,
4739 struct nfsd4_read *read,
9f0b5792
AS		 4740 unsigned long *maxcount, u32 *eof,
4741 loff_t *pos)
528b8493 4742{
bddfdbcd 4743 struct xdr_stream *xdr = resp->xdr;
528b8493
AS		 4744 struct file *file = read->rd_nf->nf_file;
4745 int starting_len = xdr->buf->len;
9f0b5792 4746 loff_t hole_pos;
528b8493
AS		 4747 __be32 nfserr;
4748 __be32 *p, tmp;
4749 __be64 tmp64;
4750
9f0b5792 4751 hole_pos = pos ? *pos : vfs_llseek(file, read->rd_offset, SEEK_HOLE);
2db27992 4752 if (hole_pos > read->rd_offset)
278765ea
AS		 4753 *maxcount = min_t(unsigned long, *maxcount, hole_pos - read->rd_offset);
4754 *maxcount = min_t(unsigned long, *maxcount, (xdr->buf->buflen - xdr->buf->len));
528b8493
AS		 4755
4756 /* Content type, offset, byte count */
4757 p = xdr_reserve_space(xdr, 4 + 8 + 4);
4758 if (!p)
4759 return nfserr_resource;
4760
278765ea 4761 read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, *maxcount);
528b8493
AS		 4762 if (read->rd_vlen < 0)
4763 return nfserr_resource;
4764
4765 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
278765ea 4766 resp->rqstp->rq_vec, read->rd_vlen, maxcount, eof);
528b8493
AS		 4767 if (nfserr)
4768 return nfserr;
72d78717 4769 xdr_truncate_encode(xdr, starting_len + 16 + xdr_align_size(*maxcount));
528b8493
AS		 4770
4771 tmp = htonl(NFS4_CONTENT_DATA);
4772 write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
4773 tmp64 = cpu_to_be64(read->rd_offset);
4774 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp64, 8);
278765ea 4775 tmp = htonl(*maxcount);
528b8493 4776 write_bytes_to_xdr_buf(xdr->buf, starting_len + 12, &tmp, 4);
72d78717
TM		 4777
4778 tmp = xdr_zero;
4779 write_bytes_to_xdr_buf(xdr->buf, starting_len + 16 + *maxcount, &tmp,
4780 xdr_pad_size(*maxcount));
528b8493
AS		 4781 return nfs_ok;
4782}
4783
2db27992
AS		 4784static __be32
4785nfsd4_encode_read_plus_hole(struct nfsd4_compoundres *resp,
4786 struct nfsd4_read *read,
278765ea 4787 unsigned long *maxcount, u32 *eof)
2db27992
AS		 4788{
4789 struct file *file = read->rd_nf->nf_file;
278765ea 4790 loff_t data_pos = vfs_llseek(file, read->rd_offset, SEEK_DATA);
9f0b5792 4791 loff_t f_size = i_size_read(file_inode(file));
278765ea 4792 unsigned long count;
2db27992
AS		 4793 __be32 *p;
4794
278765ea 4795 if (data_pos == -ENXIO)
9f0b5792
AS		 4796 data_pos = f_size;
4797 else if (data_pos <= read->rd_offset || (data_pos < f_size && data_pos % PAGE_SIZE))
4798 return nfsd4_encode_read_plus_data(resp, read, maxcount, eof, &f_size);
278765ea
AS		 4799 count = data_pos - read->rd_offset;
4800
2db27992 4801 /* Content type, offset, byte count */
bddfdbcd 4802 p = xdr_reserve_space(resp->xdr, 4 + 8 + 8);
2db27992
AS		 4803 if (!p)
4804 return nfserr_resource;
4805
4806 *p++ = htonl(NFS4_CONTENT_HOLE);
1e37d0e5
JC		 4807 p = xdr_encode_hyper(p, read->rd_offset);
4808 p = xdr_encode_hyper(p, count);
2db27992 4809
9f0b5792 4810 *eof = (read->rd_offset + count) >= f_size;
278765ea 4811 *maxcount = min_t(unsigned long, count, *maxcount);
2db27992
AS		 4812 return nfs_ok;
4813}
4814
528b8493
AS		 4815static __be32
4816nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr,
4817 struct nfsd4_read *read)
4818{
278765ea 4819 unsigned long maxcount, count;
bddfdbcd 4820 struct xdr_stream *xdr = resp->xdr;
528b8493
AS		 4821 struct file *file;
4822 int starting_len = xdr->buf->len;
9f0b5792 4823 int last_segment = xdr->buf->len;
528b8493
AS		 4824 int segments = 0;
4825 __be32 *p, tmp;
9f0b5792 4826 bool is_data;
2db27992 4827 loff_t pos;
528b8493
AS		 4828 u32 eof;
4829
4830 if (nfserr)
4831 return nfserr;
4832 file = read->rd_nf->nf_file;
4833
4834 /* eof flag, segment count */
4835 p = xdr_reserve_space(xdr, 4 + 4);
4836 if (!p)
4837 return nfserr_resource;
4838 xdr_commit_encode(xdr);
4839
4840 maxcount = svc_max_payload(resp->rqstp);
4841 maxcount = min_t(unsigned long, maxcount,
4842 (xdr->buf->buflen - xdr->buf->len));
4843 maxcount = min_t(unsigned long, maxcount, read->rd_length);
278765ea 4844 count = maxcount;
528b8493
AS		 4845
4846 eof = read->rd_offset >= i_size_read(file_inode(file));
2db27992
AS		 4847 if (eof)
4848 goto out;
4849
9f0b5792
AS		 4850 pos = vfs_llseek(file, read->rd_offset, SEEK_HOLE);
4851 is_data = pos > read->rd_offset;
2db27992 4852
9f0b5792 4853 while (count > 0 && !eof) {
278765ea 4854 maxcount = count;
9f0b5792
AS		 4855 if (is_data)
4856 nfserr = nfsd4_encode_read_plus_data(resp, read, &maxcount, &eof,
4857 segments == 0 ? &pos : NULL);
4858 else
4859 nfserr = nfsd4_encode_read_plus_hole(resp, read, &maxcount, &eof);
278765ea
AS		 4860 if (nfserr)
4861 goto out;
4862 count -= maxcount;
4863 read->rd_offset += maxcount;
9f0b5792
AS		 4864 is_data = !is_data;
4865 last_segment = xdr->buf->len;
528b8493
AS		 4866 segments++;
4867 }
4868
2db27992 4869out:
278765ea 4870 if (nfserr && segments == 0)
528b8493
AS		 4871 xdr_truncate_encode(xdr, starting_len);
4872 else {
9f0b5792
AS		 4873 if (nfserr) {
4874 xdr_truncate_encode(xdr, last_segment);
4875 nfserr = nfs_ok;
b68f0cbd 4876 eof = 0;
9f0b5792 4877 }
b68f0cbd
TM		 4878 tmp = htonl(eof);
4879 write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
4880 tmp = htonl(segments);
4881 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
528b8493 4882 }
6308bc98
OK		 4883
4884 return nfserr;
4885}
4886
51911868
OK		 4887static __be32
4888nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr,
4889 struct nfsd4_copy_notify *cn)
4890{
bddfdbcd 4891 struct xdr_stream *xdr = resp->xdr;
51911868
OK		 4892 __be32 *p;
4893
4894 if (nfserr)
4895 return nfserr;
4896
4897 /* 8 sec, 4 nsec */
4898 p = xdr_reserve_space(xdr, 12);
4899 if (!p)
4900 return nfserr_resource;
4901
4902 /* cnr_lease_time */
4903 p = xdr_encode_hyper(p, cn->cpn_sec);
4904 *p++ = cpu_to_be32(cn->cpn_nsec);
4905
4906 /* cnr_stateid */
4907 nfserr = nfsd4_encode_stateid(xdr, &cn->cpn_cnr_stateid);
4908 if (nfserr)
4909 return nfserr;
4910
4911 /* cnr_src.nl_nsvr */
4912 p = xdr_reserve_space(xdr, 4);
4913 if (!p)
4914 return nfserr_resource;
4915
4916 *p++ = cpu_to_be32(1);
4917
4918 return nfsd42_encode_nl4_server(resp, &cn->cpn_src);
4919}
4920
24bab491
AS		 4921static __be32
4922nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4923 struct nfsd4_seek *seek)
4924{
4925 __be32 *p;
4926
bddfdbcd 4927 p = xdr_reserve_space(resp->xdr, 4 + 8);
24bab491
AS		 4928 *p++ = cpu_to_be32(seek->seek_eof);
4929 p = xdr_encode_hyper(p, seek->seek_pos);
4930
bac966d6 4931 return 0;
24bab491
AS		 4932}
4933
695e12f8
BH		 4934static __be32
4935nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4936{
4937 return nfserr;
4938}
4939
23e50fe3
FL		 4940/*
4941 * Encode kmalloc-ed buffer in to XDR stream.
4942 */
b9a49237 4943static __be32
23e50fe3
FL		 4944nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen)
4945{
4946 u32 cplen;
4947 __be32 *p;
4948
4949 cplen = min_t(unsigned long, buflen,
4950 ((void *)xdr->end - (void *)xdr->p));
4951 p = xdr_reserve_space(xdr, cplen);
4952 if (!p)
4953 return nfserr_resource;
4954
4955 memcpy(p, buf, cplen);
4956 buf += cplen;
4957 buflen -= cplen;
4958
4959 while (buflen) {
4960 cplen = min_t(u32, buflen, PAGE_SIZE);
4961 p = xdr_reserve_space(xdr, cplen);
4962 if (!p)
4963 return nfserr_resource;
4964
4965 memcpy(p, buf, cplen);
4966
4967 if (cplen < PAGE_SIZE) {
4968 /*
4969 * We're done, with a length that wasn't page
4970 * aligned, so possibly not word aligned. Pad
4971 * any trailing bytes with 0.
4972 */
4973 xdr_encode_opaque_fixed(p, NULL, cplen);
4974 break;
4975 }
4976
4977 buflen -= PAGE_SIZE;
4978 buf += PAGE_SIZE;
4979 }
4980
4981 return 0;
4982}
4983
4984static __be32
4985nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
4986 struct nfsd4_getxattr *getxattr)
4987{
bddfdbcd 4988 struct xdr_stream *xdr = resp->xdr;
23e50fe3
FL		 4989 __be32 *p, err;
4990
4991 p = xdr_reserve_space(xdr, 4);
4992 if (!p)
4993 return nfserr_resource;
4994
4995 *p = cpu_to_be32(getxattr->getxa_len);
4996
4997 if (getxattr->getxa_len == 0)
4998 return 0;
4999
5000 err = nfsd4_vbuf_to_stream(xdr, getxattr->getxa_buf,
5001 getxattr->getxa_len);
5002
5003 kvfree(getxattr->getxa_buf);
5004
5005 return err;
5006}
5007
5008static __be32
5009nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5010 struct nfsd4_setxattr *setxattr)
5011{
bddfdbcd 5012 struct xdr_stream *xdr = resp->xdr;
23e50fe3
FL		 5013 __be32 *p;
5014
5015 p = xdr_reserve_space(xdr, 20);
5016 if (!p)
5017 return nfserr_resource;
5018
5019 encode_cinfo(p, &setxattr->setxa_cinfo);
5020
5021 return 0;
5022}
5023
5024/*
5025 * See if there are cookie values that can be rejected outright.
5026 */
5027static __be32
5028nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs,
5029 u32 *offsetp)
5030{
5031 u64 cookie = listxattrs->lsxa_cookie;
5032
5033 /*
5034 * If the cookie is larger than the maximum number we can fit
5035 * in either the buffer we just got back from vfs_listxattr, or,
5036 * XDR-encoded, in the return buffer, it's invalid.
5037 */
5038 if (cookie > (listxattrs->lsxa_len) / (XATTR_USER_PREFIX_LEN + 2))
5039 return nfserr_badcookie;
5040
5041 if (cookie > (listxattrs->lsxa_maxcount /
5042 (XDR_QUADLEN(XATTR_USER_PREFIX_LEN + 2) + 4)))
5043 return nfserr_badcookie;
5044
5045 *offsetp = (u32)cookie;
5046 return 0;
5047}
5048
5049static __be32
5050nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
5051 struct nfsd4_listxattrs *listxattrs)
5052{
bddfdbcd 5053 struct xdr_stream *xdr = resp->xdr;
23e50fe3
FL		 5054 u32 cookie_offset, count_offset, eof;
5055 u32 left, xdrleft, slen, count;
5056 u32 xdrlen, offset;
5057 u64 cookie;
5058 char *sp;
b9a49237 5059 __be32 status, tmp;
23e50fe3
FL		 5060 __be32 *p;
5061 u32 nuser;
5062
5063 eof = 1;
5064
5065 status = nfsd4_listxattr_validate_cookie(listxattrs, &offset);
5066 if (status)
5067 goto out;
5068
5069 /*
5070 * Reserve space for the cookie and the name array count. Record
5071 * the offsets to save them later.
5072 */
5073 cookie_offset = xdr->buf->len;
5074 count_offset = cookie_offset + 8;
5075 p = xdr_reserve_space(xdr, 12);
5076 if (!p) {
5077 status = nfserr_resource;
5078 goto out;
5079 }
5080
5081 count = 0;
5082 left = listxattrs->lsxa_len;
5083 sp = listxattrs->lsxa_buf;
5084 nuser = 0;
5085
5086 xdrleft = listxattrs->lsxa_maxcount;
5087
5088 while (left > 0 && xdrleft > 0) {
5089 slen = strlen(sp);
5090
5091 /*
4cce11fa 5092 * Check if this is a "user." attribute, skip it if not.
23e50fe3
FL		 5093 */
5094 if (strncmp(sp, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
5095 goto contloop;
5096
5097 slen -= XATTR_USER_PREFIX_LEN;
5098 xdrlen = 4 + ((slen + 3) & ~3);
5099 if (xdrlen > xdrleft) {
5100 if (count == 0) {
5101 /*
5102 * Can't even fit the first attribute name.
5103 */
5104 status = nfserr_toosmall;
5105 goto out;
5106 }
5107 eof = 0;
5108 goto wreof;
5109 }
5110
5111 left -= XATTR_USER_PREFIX_LEN;
5112 sp += XATTR_USER_PREFIX_LEN;
5113 if (nuser++ < offset)
5114 goto contloop;
5115
5116
5117 p = xdr_reserve_space(xdr, xdrlen);
5118 if (!p) {
5119 status = nfserr_resource;
5120 goto out;
5121 }
5122
e2a1840e 5123 xdr_encode_opaque(p, sp, slen);
23e50fe3
FL		 5124
5125 xdrleft -= xdrlen;
5126 count++;
5127contloop:
5128 sp += slen + 1;
5129 left -= slen + 1;
5130 }
5131
5132 /*
5133 * If there were user attributes to copy, but we didn't copy
5134 * any, the offset was too large (e.g. the cookie was invalid).
5135 */
5136 if (nuser > 0 && count == 0) {
5137 status = nfserr_badcookie;
5138 goto out;
5139 }
5140
5141wreof:
5142 p = xdr_reserve_space(xdr, 4);
5143 if (!p) {
5144 status = nfserr_resource;
5145 goto out;
5146 }
5147 *p = cpu_to_be32(eof);
5148
5149 cookie = offset + count;
5150
5151 write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &cookie, 8);
b9a49237
CL		 5152 tmp = cpu_to_be32(count);
5153 write_bytes_to_xdr_buf(xdr->buf, count_offset, &tmp, 4);
23e50fe3
FL		 5154out:
5155 if (listxattrs->lsxa_len)
5156 kvfree(listxattrs->lsxa_buf);
5157 return status;
5158}
5159
5160static __be32
5161nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5162 struct nfsd4_removexattr *removexattr)
5163{
bddfdbcd 5164 struct xdr_stream *xdr = resp->xdr;
23e50fe3
FL		 5165 __be32 *p;
5166
5167 p = xdr_reserve_space(xdr, 20);
5168 if (!p)
5169 return nfserr_resource;
5170
5171 p = encode_cinfo(p, &removexattr->rmxa_cinfo);
5172 return 0;
5173}
5174
695e12f8
BH		 5175typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
5176
2db134eb
AA		 5177/*
5178 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
5179 * since we don't need to filter out obsolete ops as this is
5180 * done in the decoding phase.
5181 */
c1df609d 5182static const nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 5183 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
5184 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
5185 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
5186 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
5187 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
5188 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
5189 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
5190 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
5191 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
5192 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
5193 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
5194 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
5195 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
5196 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
5197 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
5198 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 5199 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 5200 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
5201 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
5202 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
5203 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
5204 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
5205 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
5206 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
5207 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
5208 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
5209 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
5210 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
5211 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
5212 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
5213 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
5214 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
5215 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
5216 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
5217 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
5218 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
5219 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 5220
5221 /* NFSv4.1 operations */
5222 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 5223 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 5224 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
5225 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 5226 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
5227 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb 5228 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc
CH		 5229#ifdef CONFIG_NFSD_PNFS
5230 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
5231 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
5232 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
5233 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
5234 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
5235#else
2db134eb
AA		 5236 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
5237 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
5238 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
5239 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
5240 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc 5241#endif
22b6dee8 5242 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 5243 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
5244 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 5245 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 5246 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
5247 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
5248 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
87a15a80
AS		 5249
5250 /* NFSv4.2 operations */
5251 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
29ae7f9d 5252 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
51911868 5253 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_copy_notify,
87a15a80
AS		 5254 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
5255 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
5256 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
5257 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
5258 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
6308bc98 5259 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status,
528b8493 5260 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_read_plus,
24bab491 5261 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
87a15a80 5262 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
ffa0160a 5263 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
23e50fe3
FL		 5264
5265 /* RFC 8276 extended atributes operations */
5266 [OP_GETXATTR] = (nfsd4_enc)nfsd4_encode_getxattr,
5267 [OP_SETXATTR] = (nfsd4_enc)nfsd4_encode_setxattr,
5268 [OP_LISTXATTRS] = (nfsd4_enc)nfsd4_encode_listxattrs,
5269 [OP_REMOVEXATTR] = (nfsd4_enc)nfsd4_encode_removexattr,
695e12f8
BH		 5270};
5271
496c262c 5272/*
a8095f7e
BF		 5273 * Calculate whether we still have space to encode repsize bytes.
5274 * There are two considerations:
5275 * - For NFS versions >=4.1, the size of the reply must stay within
5276 * session limits
5277 * - For all NFS versions, we must stay within limited preallocated
5278 * buffer space.
496c262c 5279 *
a8095f7e
BF		 5280 * This is called before the operation is processed, so can only provide
5281 * an upper estimate. For some nonidempotent operations (such as
5282 * getattr), it's not necessarily a problem if that estimate is wrong,
5283 * as we can fail it after processing without significant side effects.
496c262c 5284 */
a8095f7e 5285__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 5286{
67492c99 5287 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 5288 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 5289
47ee5298
BF		 5290 if (buf->len + respsize <= buf->buflen)
5291 return nfs_ok;
5292 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 5293 return nfserr_resource;
47ee5298
BF		 5294 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
5295 WARN_ON_ONCE(1);
5296 return nfserr_rep_too_big_to_cache;
ea8d7720 5297 }
47ee5298 5298 return nfserr_rep_too_big;
496c262c
AA		 5299}
5300
1da177e4
LT		 5301void
5302nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
5303{
bddfdbcd 5304 struct xdr_stream *xdr = resp->xdr;
9411b1d4 5305 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 5306 struct svc_rqst *rqstp = resp->rqstp;
34b1744c 5307 const struct nfsd4_operation *opdesc = op->opdesc;
082d4bd7 5308 int post_err_offset;
07d1f802 5309 nfsd4_enc encoder;
bc749ca4 5310 __be32 *p;
1da177e4 5311
d0a381dd
BF		 5312 p = xdr_reserve_space(xdr, 8);
5313 if (!p) {
5314 WARN_ON_ONCE(1);
5315 return;
5316 }
c373b0a4 5317 *p++ = cpu_to_be32(op->opnum);
082d4bd7 5318 post_err_offset = xdr->buf->len;
1da177e4 5319
695e12f8
BH		 5320 if (op->opnum == OP_ILLEGAL)
5321 goto status;
b7571e4c
BF		 5322 if (op->status && opdesc &&
5323 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
5324 goto status;
3a237b4a 5325 BUG_ON(op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
695e12f8 5326 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 5327 encoder = nfsd4_enc_ops[op->opnum];
5328 op->status = encoder(resp, op->status, &op->u);
08281341
CL		 5329 if (op->status)
5330 trace_nfsd_compound_encode_err(rqstp, op->opnum, op->status);
34b1744c
BF		 5331 if (opdesc && opdesc->op_release)
5332 opdesc->op_release(&op->u);
2825a7f9
BF		 5333 xdr_commit_encode(xdr);
5334
067e1ace 5335 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 5336 if (!op->status) {
5337 int space_needed = 0;
5338 if (!nfsd4_last_compound_op(rqstp))
5339 space_needed = COMPOUND_ERR_SLACK_SPACE;
5340 op->status = nfsd4_check_resp_size(resp, space_needed);
5341 }
c8f13d97
BF		 5342 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
5343 struct nfsd4_slot *slot = resp->cstate.slot;
5344
5345 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
5346 op->status = nfserr_rep_too_big_to_cache;
5347 else
5348 op->status = nfserr_rep_too_big;
5349 }
07d1f802
BF		 5350 if (op->status == nfserr_resource ||
5351 op->status == nfserr_rep_too_big ||
5352 op->status == nfserr_rep_too_big_to_cache) {
5353 /*
5354 * The operation may have already been encoded or
5355 * partially encoded. No op returns anything additional
5356 * in the case of one of these three errors, so we can
5357 * just truncate back to after the status. But it's a
5358 * bug if we had to do this on a non-idempotent op:
5359 */
5360 warn_on_nonidempotent_op(op);
082d4bd7 5361 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 5362 }
9411b1d4 5363 if (so) {
082d4bd7
BF		 5364 int len = xdr->buf->len - post_err_offset;
5365
9411b1d4 5366 so->so_replay.rp_status = op->status;
082d4bd7
BF		 5367 so->so_replay.rp_buflen = len;
5368 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
5369 so->so_replay.rp_buf, len);
9411b1d4 5370 }
695e12f8 5371status:
082d4bd7
BF		 5372 /* Note that op->status is already in network byte order: */
5373 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 5374}
5375
5376/*
5377 * Encode the reply stored in the stateowner reply cache
5378 *
5379 * XDR note: do not encode rp->rp_buflen: the buffer contains the
5380 * previously sent already encoded operation.
1da177e4
LT		 5381 */
5382void
d0a381dd 5383nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 5384{
bc749ca4 5385 __be32 *p;
1da177e4
LT		 5386 struct nfs4_replay *rp = op->replay;
5387
d0a381dd
BF		 5388 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
5389 if (!p) {
5390 WARN_ON_ONCE(1);
5391 return;
5392 }
c373b0a4 5393 *p++ = cpu_to_be32(op->opnum);
1da177e4 5394 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 5395
0c0c267b 5396 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 5397}
5398
8537488b 5399void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
1da177e4 5400{
3e98abff
BF		 5401 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5402
1da177e4
LT		 5403 if (args->ops != args->iops) {
5404 kfree(args->ops);
5405 args->ops = args->iops;
5406 }
1da177e4 5407 while (args->to_free) {
d5e23383 5408 struct svcxdr_tmpbuf *tb = args->to_free;
1da177e4 5409 args->to_free = tb->next;
1da177e4
LT		 5410 kfree(tb);
5411 }
5412}
5413
c44b31c2 5414bool
16c66364 5415nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
1da177e4 5416{
026fec7e
CH		 5417 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5418
c1346a12 5419 /* svcxdr_tmp_alloc */
1da177e4 5420 args->to_free = NULL;
c1346a12 5421
16c66364 5422 args->xdr = xdr;
1da177e4
LT		 5423 args->ops = args->iops;
5424 args->rqstp = rqstp;
5425
d9b74bda 5426 return nfsd4_decode_compound(args);
1da177e4
LT		 5427}
5428
130e2054 5429bool
fda49441 5430nfs4svc_encode_compoundres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
1da177e4 5431{
63f8de37 5432 struct nfsd4_compoundres *resp = rqstp->rq_resp;
fda49441
CL		 5433 struct xdr_buf *buf = xdr->buf;
5434 __be32 *p;
6ac90391
BF		 5435
5436 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
5437 buf->tail[0].iov_len);
dd97fdde 5438
3b0ebb25
CL		 5439 /*
5440 * Send buffer space for the following items is reserved
5441 * at the top of nfsd4_proc_compound().
5442 */
5443 p = resp->statusp;
5444
5445 *p++ = resp->cstate.status;
cc028a10 5446
fda49441 5447 rqstp->rq_next_page = xdr->page_ptr + 1;
2825a7f9 5448
1da177e4
LT		 5449 *p++ = htonl(resp->taglen);
5450 memcpy(p, resp->tag, resp->taglen);
5451 p += XDR_QUADLEN(resp->taglen);
5452 *p++ = htonl(resp->opcnt);
5453
b607664e 5454 nfsd4_sequence_done(resp);
130e2054 5455 return true;
1da177e4 5456}
Linux 6.x block layer and io_uring tree(s)