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NFSD: drop support for ancient filehandles
[people/ms/linux.git] / fs / nfsd / nfs4xdr.c
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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;
291 i = 0;
292 while (i < count)
293 bmval[i++] = be32_to_cpup(p++);
294 while (i < bmlen)
295 bmval[i++] = 0;
296
297 return nfs_ok;
298}
299
c941a968
CL		 300static __be32
301nfsd4_decode_nfsace4(struct nfsd4_compoundargs *argp, struct nfs4_ace *ace)
302{
303 __be32 *p, status;
304 u32 length;
305
306 if (xdr_stream_decode_u32(argp->xdr, &ace->type) < 0)
307 return nfserr_bad_xdr;
308 if (xdr_stream_decode_u32(argp->xdr, &ace->flag) < 0)
309 return nfserr_bad_xdr;
310 if (xdr_stream_decode_u32(argp->xdr, &ace->access_mask) < 0)
311 return nfserr_bad_xdr;
312
313 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
314 return nfserr_bad_xdr;
315 p = xdr_inline_decode(argp->xdr, length);
316 if (!p)
317 return nfserr_bad_xdr;
318 ace->whotype = nfs4_acl_get_whotype((char *)p, length);
319 if (ace->whotype != NFS4_ACL_WHO_NAMED)
320 status = nfs_ok;
321 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
322 status = nfsd_map_name_to_gid(argp->rqstp,
323 (char *)p, length, &ace->who_gid);
324 else
325 status = nfsd_map_name_to_uid(argp->rqstp,
326 (char *)p, length, &ace->who_uid);
327
328 return status;
329}
330
331/* A counted array of nfsace4's */
332static noinline __be32
333nfsd4_decode_acl(struct nfsd4_compoundargs *argp, struct nfs4_acl **acl)
334{
335 struct nfs4_ace *ace;
336 __be32 status;
337 u32 count;
338
339 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
340 return nfserr_bad_xdr;
341
342 if (count > xdr_stream_remaining(argp->xdr) / 20)
343 /*
344 * Even with 4-byte names there wouldn't be
345 * space for that many aces; something fishy is
346 * going on:
347 */
348 return nfserr_fbig;
349
350 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(count));
351 if (*acl == NULL)
352 return nfserr_jukebox;
353
354 (*acl)->naces = count;
355 for (ace = (*acl)->aces; ace < (*acl)->aces + count; ace++) {
356 status = nfsd4_decode_nfsace4(argp, ace);
357 if (status)
358 return status;
359 }
360
361 return nfs_ok;
362}
363
dabe9182
CL		 364static noinline __be32
365nfsd4_decode_security_label(struct nfsd4_compoundargs *argp,
366 struct xdr_netobj *label)
367{
368 u32 lfs, pi, length;
369 __be32 *p;
370
371 if (xdr_stream_decode_u32(argp->xdr, &lfs) < 0)
372 return nfserr_bad_xdr;
373 if (xdr_stream_decode_u32(argp->xdr, &pi) < 0)
374 return nfserr_bad_xdr;
375
376 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
377 return nfserr_bad_xdr;
378 if (length > NFS4_MAXLABELLEN)
379 return nfserr_badlabel;
380 p = xdr_inline_decode(argp->xdr, length);
381 if (!p)
382 return nfserr_bad_xdr;
383 label->len = length;
384 label->data = svcxdr_dupstr(argp, p, length);
385 if (!label->data)
386 return nfserr_jukebox;
387
388 return nfs_ok;
389}
390
b37ad28b 391static __be32
d1c263a0
CL		 392nfsd4_decode_fattr4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen,
393 struct iattr *iattr, struct nfs4_acl **acl,
394 struct xdr_netobj *label, int *umask)
1da177e4 395{
081d53fe
CL		 396 unsigned int starting_pos;
397 u32 attrlist4_count;
d1c263a0 398 __be32 *p, status;
1da177e4 399
1da177e4 400 iattr->ia_valid = 0;
d1c263a0
CL		 401 status = nfsd4_decode_bitmap4(argp, bmval, bmlen);
402 if (status)
403 return nfserr_bad_xdr;
1da177e4 404
e864c189
BF		 405 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
406 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
407 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
408 if (nfsd_attrs_supported(argp->minorversion, bmval))
409 return nfserr_inval;
410 return nfserr_attrnotsupp;
411 }
412
081d53fe
CL		 413 if (xdr_stream_decode_u32(argp->xdr, &attrlist4_count) < 0)
414 return nfserr_bad_xdr;
415 starting_pos = xdr_stream_pos(argp->xdr);
1da177e4
LT		 416
417 if (bmval[0] & FATTR4_WORD0_SIZE) {
2ac1b9b2
CL		 418 u64 size;
419
420 if (xdr_stream_decode_u64(argp->xdr, &size) < 0)
421 return nfserr_bad_xdr;
422 iattr->ia_size = size;
1da177e4
LT		 423 iattr->ia_valid |= ATTR_SIZE;
424 }
425 if (bmval[0] & FATTR4_WORD0_ACL) {
c941a968
CL		 426 status = nfsd4_decode_acl(argp, acl);
427 if (status)
428 return status;
1da177e4
LT		 429 } else
430 *acl = NULL;
431 if (bmval[1] & FATTR4_WORD1_MODE) {
1c8f0ad7
CL		 432 u32 mode;
433
434 if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
435 return nfserr_bad_xdr;
436 iattr->ia_mode = mode;
1da177e4
LT		 437 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
438 iattr->ia_valid |= ATTR_MODE;
439 }
440 if (bmval[1] & FATTR4_WORD1_OWNER) {
9853a5ac
CL		 441 u32 length;
442
443 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
444 return nfserr_bad_xdr;
445 p = xdr_inline_decode(argp->xdr, length);
446 if (!p)
447 return nfserr_bad_xdr;
448 status = nfsd_map_name_to_uid(argp->rqstp, (char *)p, length,
449 &iattr->ia_uid);
450 if (status)
47c85291 451 return status;
1da177e4
LT		 452 iattr->ia_valid |= ATTR_UID;
453 }
454 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
393c31dd
CL		 455 u32 length;
456
457 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
458 return nfserr_bad_xdr;
459 p = xdr_inline_decode(argp->xdr, length);
460 if (!p)
461 return nfserr_bad_xdr;
462 status = nfsd_map_name_to_gid(argp->rqstp, (char *)p, length,
463 &iattr->ia_gid);
464 if (status)
47c85291 465 return status;
1da177e4
LT		 466 iattr->ia_valid |= ATTR_GID;
467 }
468 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1c3eff7e
CL		 469 u32 set_it;
470
471 if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
472 return nfserr_bad_xdr;
473 switch (set_it) {
1da177e4 474 case NFS4_SET_TO_CLIENT_TIME:
1c3eff7e 475 status = nfsd4_decode_nfstime4(argp, &iattr->ia_atime);
4c94e13e
CH		 476 if (status)
477 return status;
1da177e4
LT		 478 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
479 break;
480 case NFS4_SET_TO_SERVER_TIME:
481 iattr->ia_valid |= ATTR_ATIME;
482 break;
483 default:
1c3eff7e 484 return nfserr_bad_xdr;
1da177e4
LT		 485 }
486 }
1da177e4 487 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1c3eff7e
CL		 488 u32 set_it;
489
490 if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
491 return nfserr_bad_xdr;
492 switch (set_it) {
1da177e4 493 case NFS4_SET_TO_CLIENT_TIME:
1c3eff7e 494 status = nfsd4_decode_nfstime4(argp, &iattr->ia_mtime);
4c94e13e
CH		 495 if (status)
496 return status;
1da177e4
LT		 497 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
498 break;
499 case NFS4_SET_TO_SERVER_TIME:
500 iattr->ia_valid |= ATTR_MTIME;
501 break;
502 default:
1c3eff7e 503 return nfserr_bad_xdr;
1da177e4
LT		 504 }
505 }
18032ca0 506 label->len = 0;
2285ae76
AB		 507 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
508 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
dabe9182
CL		 509 status = nfsd4_decode_security_label(argp, label);
510 if (status)
511 return status;
18032ca0 512 }
47057abd 513 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
66f0476c
CL		 514 u32 mode, mask;
515
47057abd 516 if (!umask)
66f0476c
CL		 517 return nfserr_bad_xdr;
518 if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
519 return nfserr_bad_xdr;
520 iattr->ia_mode = mode & (S_IFMT | S_IALLUGO);
521 if (xdr_stream_decode_u32(argp->xdr, &mask) < 0)
522 return nfserr_bad_xdr;
523 *umask = mask & S_IRWXUGO;
47057abd
AG		 524 iattr->ia_valid |= ATTR_MODE;
525 }
081d53fe
CL		 526
527 /* request sanity: did attrlist4 contain the expected number of words? */
528 if (attrlist4_count != xdr_stream_pos(argp->xdr) - starting_pos)
529 return nfserr_bad_xdr;
1da177e4 530
d1c263a0 531 return nfs_ok;
1da177e4
LT		 532}
533
d3d2f381
CL		 534static __be32
535nfsd4_decode_stateid4(struct nfsd4_compoundargs *argp, stateid_t *sid)
536{
537 __be32 *p;
538
539 p = xdr_inline_decode(argp->xdr, NFS4_STATEID_SIZE);
540 if (!p)
541 return nfserr_bad_xdr;
542 sid->si_generation = be32_to_cpup(p++);
543 memcpy(&sid->si_opaque, p, sizeof(sid->si_opaque));
544 return nfs_ok;
545}
546
144e8269
CL		 547static __be32
548nfsd4_decode_clientid4(struct nfsd4_compoundargs *argp, clientid_t *clientid)
549{
550 __be32 *p;
551
552 p = xdr_inline_decode(argp->xdr, sizeof(__be64));
553 if (!p)
554 return nfserr_bad_xdr;
555 memcpy(clientid, p, sizeof(*clientid));
556 return nfs_ok;
557}
558
559static __be32
560nfsd4_decode_state_owner4(struct nfsd4_compoundargs *argp,
561 clientid_t *clientid, struct xdr_netobj *owner)
562{
563 __be32 status;
564
565 status = nfsd4_decode_clientid4(argp, clientid);
566 if (status)
567 return status;
568 return nfsd4_decode_opaque(argp, owner);
569}
570
04495971
CL		 571#ifdef CONFIG_NFSD_PNFS
572static __be32
573nfsd4_decode_deviceid4(struct nfsd4_compoundargs *argp,
574 struct nfsd4_deviceid *devid)
575{
576 __be32 *p;
577
578 p = xdr_inline_decode(argp->xdr, NFS4_DEVICEID4_SIZE);
579 if (!p)
580 return nfserr_bad_xdr;
581 memcpy(devid, p, sizeof(*devid));
582 return nfs_ok;
583}
5185980d
CL		 584
585static __be32
586nfsd4_decode_layoutupdate4(struct nfsd4_compoundargs *argp,
587 struct nfsd4_layoutcommit *lcp)
588{
589 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_layout_type) < 0)
590 return nfserr_bad_xdr;
591 if (lcp->lc_layout_type < LAYOUT_NFSV4_1_FILES)
592 return nfserr_bad_xdr;
593 if (lcp->lc_layout_type >= LAYOUT_TYPE_MAX)
594 return nfserr_bad_xdr;
595
596 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_up_len) < 0)
597 return nfserr_bad_xdr;
598 if (lcp->lc_up_len > 0) {
599 lcp->lc_up_layout = xdr_inline_decode(argp->xdr, lcp->lc_up_len);
600 if (!lcp->lc_up_layout)
601 return nfserr_bad_xdr;
602 }
603
604 return nfs_ok;
605}
606
645fcad3
CL		 607static __be32
608nfsd4_decode_layoutreturn4(struct nfsd4_compoundargs *argp,
609 struct nfsd4_layoutreturn *lrp)
610{
611 __be32 status;
612
613 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_return_type) < 0)
614 return nfserr_bad_xdr;
615 switch (lrp->lr_return_type) {
616 case RETURN_FILE:
617 if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.offset) < 0)
618 return nfserr_bad_xdr;
619 if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.length) < 0)
620 return nfserr_bad_xdr;
621 status = nfsd4_decode_stateid4(argp, &lrp->lr_sid);
622 if (status)
623 return status;
624 if (xdr_stream_decode_u32(argp->xdr, &lrp->lrf_body_len) < 0)
625 return nfserr_bad_xdr;
626 if (lrp->lrf_body_len > 0) {
627 lrp->lrf_body = xdr_inline_decode(argp->xdr, lrp->lrf_body_len);
628 if (!lrp->lrf_body)
629 return nfserr_bad_xdr;
630 }
631 break;
632 case RETURN_FSID:
633 case RETURN_ALL:
634 lrp->lr_seg.offset = 0;
635 lrp->lr_seg.length = NFS4_MAX_UINT64;
636 break;
637 default:
638 return nfserr_bad_xdr;
639 }
640
641 return nfs_ok;
642}
643
04495971
CL		 644#endif /* CONFIG_NFSD_PNFS */
645
571e0451
CL		 646static __be32
647nfsd4_decode_sessionid4(struct nfsd4_compoundargs *argp,
648 struct nfs4_sessionid *sessionid)
649{
650 __be32 *p;
651
652 p = xdr_inline_decode(argp->xdr, NFS4_MAX_SESSIONID_LEN);
653 if (!p)
654 return nfserr_bad_xdr;
655 memcpy(sessionid->data, p, sizeof(sessionid->data));
656 return nfs_ok;
657}
658
1a994408
CL		 659/* Defined in Appendix A of RFC 5531 */
660static __be32
661nfsd4_decode_authsys_parms(struct nfsd4_compoundargs *argp,
662 struct nfsd4_cb_sec *cbs)
acb2887e 663{
1a994408
CL		 664 u32 stamp, gidcount, uid, gid;
665 __be32 *p, status;
666
667 if (xdr_stream_decode_u32(argp->xdr, &stamp) < 0)
668 return nfserr_bad_xdr;
669 /* machine name */
670 status = nfsd4_decode_ignored_string(argp, 255);
671 if (status)
672 return status;
673 if (xdr_stream_decode_u32(argp->xdr, &uid) < 0)
674 return nfserr_bad_xdr;
675 if (xdr_stream_decode_u32(argp->xdr, &gid) < 0)
676 return nfserr_bad_xdr;
677 if (xdr_stream_decode_u32(argp->xdr, &gidcount) < 0)
678 return nfserr_bad_xdr;
679 if (gidcount > 16)
680 return nfserr_bad_xdr;
681 p = xdr_inline_decode(argp->xdr, gidcount << 2);
682 if (!p)
683 return nfserr_bad_xdr;
684 if (cbs->flavor == (u32)(-1)) {
685 struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
686
687 kuid_t kuid = make_kuid(userns, uid);
688 kgid_t kgid = make_kgid(userns, gid);
689 if (uid_valid(kuid) && gid_valid(kgid)) {
690 cbs->uid = kuid;
691 cbs->gid = kgid;
692 cbs->flavor = RPC_AUTH_UNIX;
693 } else {
694 dprintk("RPC_AUTH_UNIX with invalid uid or gid, ignoring!\n");
695 }
696 }
697
698 return nfs_ok;
699}
700
701static __be32
702nfsd4_decode_gss_cb_handles4(struct nfsd4_compoundargs *argp,
703 struct nfsd4_cb_sec *cbs)
704{
705 __be32 status;
706 u32 service;
707
708 dprintk("RPC_AUTH_GSS callback secflavor not supported!\n");
709
710 if (xdr_stream_decode_u32(argp->xdr, &service) < 0)
711 return nfserr_bad_xdr;
712 if (service < RPC_GSS_SVC_NONE || service > RPC_GSS_SVC_PRIVACY)
713 return nfserr_bad_xdr;
714 /* gcbp_handle_from_server */
715 status = nfsd4_decode_ignored_string(argp, 0);
716 if (status)
717 return status;
718 /* gcbp_handle_from_client */
719 status = nfsd4_decode_ignored_string(argp, 0);
720 if (status)
721 return status;
722
723 return nfs_ok;
724}
725
726/* a counted array of callback_sec_parms4 items */
727static __be32
728nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
729{
730 u32 i, secflavor, nr_secflavs;
731 __be32 status;
acb2887e
BF		 732
733 /* callback_sec_params4 */
1a994408
CL		 734 if (xdr_stream_decode_u32(argp->xdr, &nr_secflavs) < 0)
735 return nfserr_bad_xdr;
57569a70
BF		 736 if (nr_secflavs)
737 cbs->flavor = (u32)(-1);
738 else
739 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
740 cbs->flavor = 0;
1a994408 741
acb2887e 742 for (i = 0; i < nr_secflavs; ++i) {
1a994408
CL		 743 if (xdr_stream_decode_u32(argp->xdr, &secflavor) < 0)
744 return nfserr_bad_xdr;
745 switch (secflavor) {
acb2887e 746 case RPC_AUTH_NULL:
1a994408 747 /* void */
12fc3e92
BF		 748 if (cbs->flavor == (u32)(-1))
749 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 750 break;
751 case RPC_AUTH_UNIX:
1a994408
CL		 752 status = nfsd4_decode_authsys_parms(argp, cbs);
753 if (status)
754 return status;
acb2887e
BF		 755 break;
756 case RPC_AUTH_GSS:
1a994408
CL		 757 status = nfsd4_decode_gss_cb_handles4(argp, cbs);
758 if (status)
759 return status;
acb2887e
BF		 760 break;
761 default:
acb2887e
BF		 762 return nfserr_inval;
763 }
764 }
1a994408
CL		 765
766 return nfs_ok;
acb2887e
BF		 767}
768
1a994408 769
d169a6a9
CL		 770/*
771 * NFSv4 operation argument decoders
772 */
773
774static __be32
775nfsd4_decode_access(struct nfsd4_compoundargs *argp,
776 struct nfsd4_access *access)
777{
778 if (xdr_stream_decode_u32(argp->xdr, &access->ac_req_access) < 0)
779 return nfserr_bad_xdr;
780 return nfs_ok;
781}
782
b37ad28b 783static __be32
1da177e4
LT		 784nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
785{
d3d2f381
CL		 786 if (xdr_stream_decode_u32(argp->xdr, &close->cl_seqid) < 0)
787 return nfserr_bad_xdr;
788 return nfsd4_decode_stateid4(argp, &close->cl_stateid);
1da177e4
LT		 789}
790
791
b37ad28b 792static __be32
1da177e4
LT		 793nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
794{
cbd9abb3
CL		 795 if (xdr_stream_decode_u64(argp->xdr, &commit->co_offset) < 0)
796 return nfserr_bad_xdr;
797 if (xdr_stream_decode_u32(argp->xdr, &commit->co_count) < 0)
798 return nfserr_bad_xdr;
799 return nfs_ok;
1da177e4
LT		 800}
801
b37ad28b 802static __be32
1da177e4
LT		 803nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
804{
000dfa18 805 __be32 *p, status;
1da177e4 806
000dfa18
CL		 807 if (xdr_stream_decode_u32(argp->xdr, &create->cr_type) < 0)
808 return nfserr_bad_xdr;
1da177e4
LT		 809 switch (create->cr_type) {
810 case NF4LNK:
000dfa18
CL		 811 if (xdr_stream_decode_u32(argp->xdr, &create->cr_datalen) < 0)
812 return nfserr_bad_xdr;
813 p = xdr_inline_decode(argp->xdr, create->cr_datalen);
814 if (!p)
815 return nfserr_bad_xdr;
29c353b3 816 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
7fb84306 817 if (!create->cr_data)
76f47128 818 return nfserr_jukebox;
1da177e4
LT		 819 break;
820 case NF4BLK:
821 case NF4CHR:
000dfa18
CL		 822 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata1) < 0)
823 return nfserr_bad_xdr;
824 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata2) < 0)
825 return nfserr_bad_xdr;
1da177e4
LT		 826 break;
827 case NF4SOCK:
828 case NF4FIFO:
829 case NF4DIR:
830 default:
831 break;
832 }
000dfa18
CL		 833 status = nfsd4_decode_component4(argp, &create->cr_name,
834 &create->cr_namelen);
835 if (status)
1da177e4 836 return status;
d1c263a0
CL		 837 status = nfsd4_decode_fattr4(argp, create->cr_bmval,
838 ARRAY_SIZE(create->cr_bmval),
839 &create->cr_iattr, &create->cr_acl,
840 &create->cr_label, &create->cr_umask);
c0d6fc8a 841 if (status)
000dfa18 842 return status;
1da177e4 843
000dfa18 844 return nfs_ok;
1da177e4
LT		 845}
846
b37ad28b 847static inline __be32
1da177e4
LT		 848nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
849{
95e6482c 850 return nfsd4_decode_stateid4(argp, &dr->dr_stateid);
1da177e4
LT		 851}
852
b37ad28b 853static inline __be32
1da177e4
LT		 854nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
855{
f759eff2
CL		 856 return nfsd4_decode_bitmap4(argp, getattr->ga_bmval,
857 ARRAY_SIZE(getattr->ga_bmval));
1da177e4
LT		 858}
859
b37ad28b 860static __be32
1da177e4
LT		 861nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
862{
5c505d12 863 return nfsd4_decode_component4(argp, &link->li_name, &link->li_namelen);
1da177e4
LT		 864}
865
8918cc0d
CL		 866static __be32
867nfsd4_decode_open_to_lock_owner4(struct nfsd4_compoundargs *argp,
868 struct nfsd4_lock *lock)
869{
870 __be32 status;
871
872 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_open_seqid) < 0)
873 return nfserr_bad_xdr;
874 status = nfsd4_decode_stateid4(argp, &lock->lk_new_open_stateid);
875 if (status)
876 return status;
877 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_lock_seqid) < 0)
878 return nfserr_bad_xdr;
879 return nfsd4_decode_state_owner4(argp, &lock->lk_new_clientid,
880 &lock->lk_new_owner);
881}
882
883static __be32
884nfsd4_decode_exist_lock_owner4(struct nfsd4_compoundargs *argp,
885 struct nfsd4_lock *lock)
886{
887 __be32 status;
888
889 status = nfsd4_decode_stateid4(argp, &lock->lk_old_lock_stateid);
890 if (status)
891 return status;
892 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_old_lock_seqid) < 0)
893 return nfserr_bad_xdr;
894
895 return nfs_ok;
896}
897
898static __be32
899nfsd4_decode_locker4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
900{
901 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_is_new) < 0)
902 return nfserr_bad_xdr;
903 if (lock->lk_is_new)
904 return nfsd4_decode_open_to_lock_owner4(argp, lock);
905 return nfsd4_decode_exist_lock_owner4(argp, lock);
906}
907
b37ad28b 908static __be32
1da177e4
LT		 909nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
910{
7c59deed
CL		 911 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_type) < 0)
912 return nfserr_bad_xdr;
1da177e4 913 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
7c59deed
CL		 914 return nfserr_bad_xdr;
915 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_reclaim) < 0)
916 return nfserr_bad_xdr;
917 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_offset) < 0)
918 return nfserr_bad_xdr;
919 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_length) < 0)
920 return nfserr_bad_xdr;
921 return nfsd4_decode_locker4(argp, lock);
1da177e4
LT		 922}
923
b37ad28b 924static __be32
1da177e4
LT		 925nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
926{
0a146f04
CL		 927 if (xdr_stream_decode_u32(argp->xdr, &lockt->lt_type) < 0)
928 return nfserr_bad_xdr;
929 if ((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
930 return nfserr_bad_xdr;
931 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_offset) < 0)
932 return nfserr_bad_xdr;
933 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_length) < 0)
934 return nfserr_bad_xdr;
935 return nfsd4_decode_state_owner4(argp, &lockt->lt_clientid,
936 &lockt->lt_owner);
1da177e4
LT		 937}
938
b37ad28b 939static __be32
1da177e4
LT		 940nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
941{
ca9cf9fc 942 __be32 status;
1da177e4 943
ca9cf9fc
CL		 944 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_type) < 0)
945 return nfserr_bad_xdr;
1da177e4 946 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
ca9cf9fc
CL		 947 return nfserr_bad_xdr;
948 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_seqid) < 0)
949 return nfserr_bad_xdr;
950 status = nfsd4_decode_stateid4(argp, &locku->lu_stateid);
e31a1b66
BH		 951 if (status)
952 return status;
ca9cf9fc
CL		 953 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_offset) < 0)
954 return nfserr_bad_xdr;
955 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_length) < 0)
956 return nfserr_bad_xdr;
1da177e4 957
ca9cf9fc 958 return nfs_ok;
1da177e4
LT		 959}
960
b37ad28b 961static __be32
1da177e4
LT		 962nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
963{
3d5877e8 964 return nfsd4_decode_component4(argp, &lookup->lo_name, &lookup->lo_len);
1da177e4
LT		 965}
966
bf33bab3
CL		 967static __be32
968nfsd4_decode_createhow4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
969{
970 __be32 status;
971
972 if (xdr_stream_decode_u32(argp->xdr, &open->op_createmode) < 0)
973 return nfserr_bad_xdr;
974 switch (open->op_createmode) {
975 case NFS4_CREATE_UNCHECKED:
976 case NFS4_CREATE_GUARDED:
977 status = nfsd4_decode_fattr4(argp, open->op_bmval,
978 ARRAY_SIZE(open->op_bmval),
979 &open->op_iattr, &open->op_acl,
980 &open->op_label, &open->op_umask);
981 if (status)
982 return status;
983 break;
984 case NFS4_CREATE_EXCLUSIVE:
985 status = nfsd4_decode_verifier4(argp, &open->op_verf);
986 if (status)
987 return status;
988 break;
989 case NFS4_CREATE_EXCLUSIVE4_1:
990 if (argp->minorversion < 1)
991 return nfserr_bad_xdr;
992 status = nfsd4_decode_verifier4(argp, &open->op_verf);
993 if (status)
994 return status;
995 status = nfsd4_decode_fattr4(argp, open->op_bmval,
996 ARRAY_SIZE(open->op_bmval),
997 &open->op_iattr, &open->op_acl,
998 &open->op_label, &open->op_umask);
999 if (status)
1000 return status;
1001 break;
1002 default:
1003 return nfserr_bad_xdr;
1004 }
1005
1006 return nfs_ok;
1007}
1008
e6ec04b2
CL		 1009static __be32
1010nfsd4_decode_openflag4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
1011{
1012 __be32 status;
1013
1014 if (xdr_stream_decode_u32(argp->xdr, &open->op_create) < 0)
1015 return nfserr_bad_xdr;
1016 switch (open->op_create) {
1017 case NFS4_OPEN_NOCREATE:
1018 break;
1019 case NFS4_OPEN_CREATE:
1020 status = nfsd4_decode_createhow4(argp, open);
1021 if (status)
1022 return status;
1023 break;
1024 default:
1025 return nfserr_bad_xdr;
1026 }
1027
1028 return nfs_ok;
1029}
1030
2c8bd7e0 1031static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664 1032{
04f9e664
BF		 1033 u32 w;
1034
9aa62f51
CL		 1035 if (xdr_stream_decode_u32(argp->xdr, &w) < 0)
1036 return nfserr_bad_xdr;
2c8bd7e0
BH		 1037 *share_access = w & NFS4_SHARE_ACCESS_MASK;
1038 *deleg_want = w & NFS4_SHARE_WANT_MASK;
1039 if (deleg_when)
1040 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
1041
04f9e664
BF		 1042 switch (w & NFS4_SHARE_ACCESS_MASK) {
1043 case NFS4_SHARE_ACCESS_READ:
1044 case NFS4_SHARE_ACCESS_WRITE:
1045 case NFS4_SHARE_ACCESS_BOTH:
1046 break;
1047 default:
1048 return nfserr_bad_xdr;
1049 }
fc0d14fe 1050 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 1051 if (!w)
1052 return nfs_ok;
1053 if (!argp->minorversion)
1054 return nfserr_bad_xdr;
1055 switch (w & NFS4_SHARE_WANT_MASK) {
1056 case NFS4_SHARE_WANT_NO_PREFERENCE:
1057 case NFS4_SHARE_WANT_READ_DELEG:
1058 case NFS4_SHARE_WANT_WRITE_DELEG:
1059 case NFS4_SHARE_WANT_ANY_DELEG:
1060 case NFS4_SHARE_WANT_NO_DELEG:
1061 case NFS4_SHARE_WANT_CANCEL:
1062 break;
1063 default:
1064 return nfserr_bad_xdr;
1065 }
92bac8c5 1066 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 1067 if (!w)
1068 return nfs_ok;
2c8bd7e0
BH		 1069
1070 if (!deleg_when) /* open_downgrade */
1071 return nfserr_inval;
04f9e664
BF		 1072 switch (w) {
1073 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
1074 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 1075 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
1076 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 1077 return nfs_ok;
1078 }
04f9e664
BF		 1079 return nfserr_bad_xdr;
1080}
1081
1082static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
1083{
b07bebd9
CL		 1084 if (xdr_stream_decode_u32(argp->xdr, x) < 0)
1085 return nfserr_bad_xdr;
1086 /* Note: unlike access bits, deny bits may be zero. */
01cd4afa 1087 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664 1088 return nfserr_bad_xdr;
b07bebd9 1089
04f9e664 1090 return nfs_ok;
04f9e664
BF		 1091}
1092
1708e50b
CL		 1093static __be32
1094nfsd4_decode_open_claim4(struct nfsd4_compoundargs *argp,
1095 struct nfsd4_open *open)
1096{
1097 __be32 status;
1098
1099 if (xdr_stream_decode_u32(argp->xdr, &open->op_claim_type) < 0)
1100 return nfserr_bad_xdr;
1101 switch (open->op_claim_type) {
1102 case NFS4_OPEN_CLAIM_NULL:
1103 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1104 status = nfsd4_decode_component4(argp, &open->op_fname,
1105 &open->op_fnamelen);
1106 if (status)
1107 return status;
1108 break;
1109 case NFS4_OPEN_CLAIM_PREVIOUS:
1110 if (xdr_stream_decode_u32(argp->xdr, &open->op_delegate_type) < 0)
1111 return nfserr_bad_xdr;
1112 break;
1113 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1114 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1115 if (status)
1116 return status;
1117 status = nfsd4_decode_component4(argp, &open->op_fname,
1118 &open->op_fnamelen);
1119 if (status)
1120 return status;
1121 break;
1122 case NFS4_OPEN_CLAIM_FH:
1123 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1124 if (argp->minorversion < 1)
1125 return nfserr_bad_xdr;
1126 /* void */
1127 break;
1128 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1129 if (argp->minorversion < 1)
1130 return nfserr_bad_xdr;
1131 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1132 if (status)
1133 return status;
1134 break;
1135 default:
1136 return nfserr_bad_xdr;
1137 }
1138
1139 return nfs_ok;
1140}
1141
b37ad28b 1142static __be32
1da177e4
LT		 1143nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
1144{
61e5e0b3 1145 __be32 status;
2c8bd7e0 1146 u32 dummy;
1da177e4
LT		 1147
1148 memset(open->op_bmval, 0, sizeof(open->op_bmval));
1149 open->op_iattr.ia_valid = 0;
fe0750e5 1150 open->op_openowner = NULL;
1da177e4 1151
9d313b17 1152 open->op_xdr_error = 0;
61e5e0b3
CL		 1153 if (xdr_stream_decode_u32(argp->xdr, &open->op_seqid) < 0)
1154 return nfserr_bad_xdr;
1155 /* deleg_want is ignored */
2c8bd7e0
BH		 1156 status = nfsd4_decode_share_access(argp, &open->op_share_access,
1157 &open->op_deleg_want, &dummy);
04f9e664 1158 if (status)
61e5e0b3 1159 return status;
04f9e664
BF		 1160 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
1161 if (status)
61e5e0b3
CL		 1162 return status;
1163 status = nfsd4_decode_state_owner4(argp, &open->op_clientid,
1164 &open->op_owner);
a084daf5 1165 if (status)
61e5e0b3 1166 return status;
e6ec04b2
CL		 1167 status = nfsd4_decode_openflag4(argp, open);
1168 if (status)
1169 return status;
61e5e0b3 1170 return nfsd4_decode_open_claim4(argp, open);
1da177e4
LT		 1171}
1172
b37ad28b 1173static __be32
1da177e4
LT		 1174nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1175{
06bee693 1176 __be32 status;
e1a90ebd
AS		 1177
1178 if (argp->minorversion >= 1)
1179 return nfserr_notsupp;
1180
06bee693 1181 status = nfsd4_decode_stateid4(argp, &open_conf->oc_req_stateid);
e31a1b66
BH		 1182 if (status)
1183 return status;
06bee693
CL		 1184 if (xdr_stream_decode_u32(argp->xdr, &open_conf->oc_seqid) < 0)
1185 return nfserr_bad_xdr;
e1a90ebd 1186
06bee693 1187 return nfs_ok;
1da177e4
LT		 1188}
1189
b37ad28b 1190static __be32
1da177e4
LT		 1191nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1192{
dca71651
CL		 1193 __be32 status;
1194
1195 status = nfsd4_decode_stateid4(argp, &open_down->od_stateid);
e31a1b66
BH		 1196 if (status)
1197 return status;
dca71651
CL		 1198 if (xdr_stream_decode_u32(argp->xdr, &open_down->od_seqid) < 0)
1199 return nfserr_bad_xdr;
1200 /* deleg_want is ignored */
2c8bd7e0
BH		 1201 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1202 &open_down->od_deleg_want, NULL);
04f9e664
BF		 1203 if (status)
1204 return status;
dca71651 1205 return nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1da177e4
LT		 1206}
1207
b37ad28b 1208static __be32
1da177e4
LT		 1209nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1210{
a73bed98 1211 __be32 *p;
1da177e4 1212
a73bed98
CL		 1213 if (xdr_stream_decode_u32(argp->xdr, &putfh->pf_fhlen) < 0)
1214 return nfserr_bad_xdr;
1da177e4 1215 if (putfh->pf_fhlen > NFS4_FHSIZE)
a73bed98
CL		 1216 return nfserr_bad_xdr;
1217 p = xdr_inline_decode(argp->xdr, putfh->pf_fhlen);
1218 if (!p)
1219 return nfserr_bad_xdr;
7b723008 1220 putfh->pf_fhval = svcxdr_savemem(argp, p, putfh->pf_fhlen);
a73bed98
CL		 1221 if (!putfh->pf_fhval)
1222 return nfserr_jukebox;
1da177e4 1223
a73bed98 1224 return nfs_ok;
1da177e4
LT		 1225}
1226
e1a90ebd
AS		 1227static __be32
1228nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1229{
1230 if (argp->minorversion == 0)
1231 return nfs_ok;
1232 return nfserr_notsupp;
1233}
1234
b37ad28b 1235static __be32
1da177e4
LT		 1236nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1237{
3909c3bc 1238 __be32 status;
1da177e4 1239
3909c3bc 1240 status = nfsd4_decode_stateid4(argp, &read->rd_stateid);
e31a1b66
BH		 1241 if (status)
1242 return status;
3909c3bc
CL		 1243 if (xdr_stream_decode_u64(argp->xdr, &read->rd_offset) < 0)
1244 return nfserr_bad_xdr;
1245 if (xdr_stream_decode_u32(argp->xdr, &read->rd_length) < 0)
1246 return nfserr_bad_xdr;
1da177e4 1247
3909c3bc 1248 return nfs_ok;
1da177e4
LT		 1249}
1250
b37ad28b 1251static __be32
1da177e4
LT		 1252nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1253{
0dfaf2a3 1254 __be32 status;
1da177e4 1255
0dfaf2a3
CL		 1256 if (xdr_stream_decode_u64(argp->xdr, &readdir->rd_cookie) < 0)
1257 return nfserr_bad_xdr;
1258 status = nfsd4_decode_verifier4(argp, &readdir->rd_verf);
1259 if (status)
1260 return status;
1261 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_dircount) < 0)
1262 return nfserr_bad_xdr;
1263 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_maxcount) < 0)
1264 return nfserr_bad_xdr;
1265 if (xdr_stream_decode_uint32_array(argp->xdr, readdir->rd_bmval,
1266 ARRAY_SIZE(readdir->rd_bmval)) < 0)
1267 return nfserr_bad_xdr;
1da177e4 1268
0dfaf2a3 1269 return nfs_ok;
1da177e4
LT		 1270}
1271
b37ad28b 1272static __be32
1da177e4
LT		 1273nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1274{
b7f5fbf2 1275 return nfsd4_decode_component4(argp, &remove->rm_name, &remove->rm_namelen);
1da177e4
LT		 1276}
1277
b37ad28b 1278static __be32
1da177e4
LT		 1279nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1280{
ba881a0a 1281 __be32 status;
1da177e4 1282
ba881a0a
CL		 1283 status = nfsd4_decode_component4(argp, &rename->rn_sname, &rename->rn_snamelen);
1284 if (status)
1da177e4 1285 return status;
ba881a0a 1286 return nfsd4_decode_component4(argp, &rename->rn_tname, &rename->rn_tnamelen);
1da177e4
LT		 1287}
1288
b37ad28b 1289static __be32
1da177e4
LT		 1290nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1291{
d12f9045 1292 return nfsd4_decode_clientid4(argp, clientid);
1da177e4
LT		 1293}
1294
dcb488a3
AA		 1295static __be32
1296nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1297 struct nfsd4_secinfo *secinfo)
1298{
d0abdae5 1299 return nfsd4_decode_component4(argp, &secinfo->si_name, &secinfo->si_namelen);
dcb488a3
AA		 1300}
1301
b37ad28b 1302static __be32
1da177e4
LT		 1303nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1304{
e31a1b66 1305 __be32 status;
1da177e4 1306
44592fe9 1307 status = nfsd4_decode_stateid4(argp, &setattr->sa_stateid);
e31a1b66
BH		 1308 if (status)
1309 return status;
d1c263a0
CL		 1310 return nfsd4_decode_fattr4(argp, setattr->sa_bmval,
1311 ARRAY_SIZE(setattr->sa_bmval),
1312 &setattr->sa_iattr, &setattr->sa_acl,
1313 &setattr->sa_label, NULL);
1da177e4
LT		 1314}
1315
b37ad28b 1316static __be32
1da177e4
LT		 1317nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1318{
92fa6c08 1319 __be32 *p, status;
1da177e4 1320
e1a90ebd
AS		 1321 if (argp->minorversion >= 1)
1322 return nfserr_notsupp;
1323
92fa6c08
CL		 1324 status = nfsd4_decode_verifier4(argp, &setclientid->se_verf);
1325 if (status)
1326 return status;
a084daf5
BF		 1327 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1328 if (status)
92fa6c08
CL		 1329 return status;
1330 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_prog) < 0)
a084daf5 1331 return nfserr_bad_xdr;
92fa6c08
CL		 1332 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_netid_len) < 0)
1333 return nfserr_bad_xdr;
1334 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_netid_len);
1335 if (!p)
1336 return nfserr_bad_xdr;
7b723008 1337 setclientid->se_callback_netid_val = svcxdr_savemem(argp, p,
92fa6c08
CL		 1338 setclientid->se_callback_netid_len);
1339 if (!setclientid->se_callback_netid_val)
1340 return nfserr_jukebox;
1da177e4 1341
92fa6c08
CL		 1342 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_addr_len) < 0)
1343 return nfserr_bad_xdr;
1344 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_addr_len);
1345 if (!p)
1346 return nfserr_bad_xdr;
7b723008 1347 setclientid->se_callback_addr_val = svcxdr_savemem(argp, p,
92fa6c08
CL		 1348 setclientid->se_callback_addr_len);
1349 if (!setclientid->se_callback_addr_val)
1350 return nfserr_jukebox;
92fa6c08
CL		 1351 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_ident) < 0)
1352 return nfserr_bad_xdr;
1da177e4 1353
92fa6c08 1354 return nfs_ok;
1da177e4
LT		 1355}
1356
b37ad28b 1357static __be32
1da177e4
LT		 1358nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1359{
d1ca5514 1360 __be32 status;
1da177e4 1361
e1a90ebd
AS		 1362 if (argp->minorversion >= 1)
1363 return nfserr_notsupp;
1364
d1ca5514
CL		 1365 status = nfsd4_decode_clientid4(argp, &scd_c->sc_clientid);
1366 if (status)
1367 return status;
1368 return nfsd4_decode_verifier4(argp, &scd_c->sc_confirm);
1da177e4
LT		 1369}
1370
1371/* Also used for NVERIFY */
b37ad28b 1372static __be32
1da177e4
LT		 1373nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1374{
67cd453e 1375 __be32 *p, status;
1da177e4 1376
67cd453e
CL		 1377 status = nfsd4_decode_bitmap4(argp, verify->ve_bmval,
1378 ARRAY_SIZE(verify->ve_bmval));
1379 if (status)
1380 return status;
1da177e4
LT		 1381
1382 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1383 * nfsd4_proc_verify */
1384
67cd453e
CL		 1385 if (xdr_stream_decode_u32(argp->xdr, &verify->ve_attrlen) < 0)
1386 return nfserr_bad_xdr;
1387 p = xdr_inline_decode(argp->xdr, verify->ve_attrlen);
1388 if (!p)
1389 return nfserr_bad_xdr;
7b723008 1390 verify->ve_attrval = svcxdr_savemem(argp, p, verify->ve_attrlen);
67cd453e
CL		 1391 if (!verify->ve_attrval)
1392 return nfserr_jukebox;
1da177e4 1393
67cd453e 1394 return nfs_ok;
1da177e4
LT		 1395}
1396
b37ad28b 1397static __be32
1da177e4
LT		 1398nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1399{
244e2bef 1400 __be32 status;
1da177e4 1401
244e2bef 1402 status = nfsd4_decode_stateid4(argp, &write->wr_stateid);
e31a1b66
BH		 1403 if (status)
1404 return status;
244e2bef
CL		 1405 if (xdr_stream_decode_u64(argp->xdr, &write->wr_offset) < 0)
1406 return nfserr_bad_xdr;
1407 if (xdr_stream_decode_u32(argp->xdr, &write->wr_stable_how) < 0)
1408 return nfserr_bad_xdr;
54bbb7d2 1409 if (write->wr_stable_how > NFS_FILE_SYNC)
244e2bef
CL		 1410 return nfserr_bad_xdr;
1411 if (xdr_stream_decode_u32(argp->xdr, &write->wr_buflen) < 0)
1412 return nfserr_bad_xdr;
c1346a12 1413 if (!xdr_stream_subsegment(argp->xdr, &write->wr_payload, write->wr_buflen))
244e2bef 1414 return nfserr_bad_xdr;
1da177e4 1415
244e2bef 1416 return nfs_ok;
1da177e4
LT		 1417}
1418
b37ad28b 1419static __be32
1da177e4
LT		 1420nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1421{
a4a80c15 1422 __be32 status;
1da177e4 1423
e1a90ebd
AS		 1424 if (argp->minorversion >= 1)
1425 return nfserr_notsupp;
1426
a4a80c15
CL		 1427 status = nfsd4_decode_state_owner4(argp, &rlockowner->rl_clientid,
1428 &rlockowner->rl_owner);
1429 if (status)
1430 return status;
1da177e4 1431
60adfc50
AA		 1432 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1433 return nfserr_inval;
a4a80c15
CL		 1434
1435 return nfs_ok;
1da177e4
LT		 1436}
1437
0f81d960
CL		 1438static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
1439{
1440 if (xdr_stream_decode_u32(argp->xdr, &bc->bc_cb_program) < 0)
1441 return nfserr_bad_xdr;
1442 return nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
1443}
1444
571e0451
CL		 1445static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
1446{
1447 u32 use_conn_in_rdma_mode;
1448 __be32 status;
1449
1450 status = nfsd4_decode_sessionid4(argp, &bcts->sessionid);
1451 if (status)
1452 return status;
1453 if (xdr_stream_decode_u32(argp->xdr, &bcts->dir) < 0)
1454 return nfserr_bad_xdr;
1455 if (xdr_stream_decode_u32(argp->xdr, &use_conn_in_rdma_mode) < 0)
1456 return nfserr_bad_xdr;
1457
1458 return nfs_ok;
1459}
1460
2548aa78
CL		 1461static __be32
1462nfsd4_decode_state_protect_ops(struct nfsd4_compoundargs *argp,
1463 struct nfsd4_exchange_id *exid)
1464{
1465 __be32 status;
1466
1467 status = nfsd4_decode_bitmap4(argp, exid->spo_must_enforce,
1468 ARRAY_SIZE(exid->spo_must_enforce));
1469 if (status)
1470 return nfserr_bad_xdr;
1471 status = nfsd4_decode_bitmap4(argp, exid->spo_must_allow,
1472 ARRAY_SIZE(exid->spo_must_allow));
1473 if (status)
1474 return nfserr_bad_xdr;
1475
1476 return nfs_ok;
1477}
1478
547bfeb4
CL		 1479/*
1480 * This implementation currently does not support SP4_SSV.
1481 * This decoder simply skips over these arguments.
1482 */
1483static noinline __be32
1484nfsd4_decode_ssv_sp_parms(struct nfsd4_compoundargs *argp,
1485 struct nfsd4_exchange_id *exid)
1486{
1487 u32 count, window, num_gss_handles;
1488 __be32 status;
1489
1490 /* ssp_ops */
1491 status = nfsd4_decode_state_protect_ops(argp, exid);
1492 if (status)
1493 return status;
1494
1495 /* ssp_hash_algs<> */
1496 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1497 return nfserr_bad_xdr;
1498 while (count--) {
1499 status = nfsd4_decode_ignored_string(argp, 0);
1500 if (status)
1501 return status;
1502 }
1503
1504 /* ssp_encr_algs<> */
1505 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1506 return nfserr_bad_xdr;
1507 while (count--) {
1508 status = nfsd4_decode_ignored_string(argp, 0);
1509 if (status)
1510 return status;
1511 }
1512
1513 if (xdr_stream_decode_u32(argp->xdr, &window) < 0)
1514 return nfserr_bad_xdr;
1515 if (xdr_stream_decode_u32(argp->xdr, &num_gss_handles) < 0)
1516 return nfserr_bad_xdr;
1517
1518 return nfs_ok;
1519}
1520
2db134eb 1521static __be32
523ec6ed
CL		 1522nfsd4_decode_state_protect4_a(struct nfsd4_compoundargs *argp,
1523 struct nfsd4_exchange_id *exid)
2db134eb 1524{
523ec6ed 1525 __be32 status;
0733d213 1526
523ec6ed 1527 if (xdr_stream_decode_u32(argp->xdr, &exid->spa_how) < 0)
a084daf5 1528 return nfserr_bad_xdr;
0733d213
AA		 1529 switch (exid->spa_how) {
1530 case SP4_NONE:
1531 break;
1532 case SP4_MACH_CRED:
2548aa78 1533 status = nfsd4_decode_state_protect_ops(argp, exid);
ed941643 1534 if (status)
2548aa78 1535 return status;
0733d213
AA		 1536 break;
1537 case SP4_SSV:
547bfeb4 1538 status = nfsd4_decode_ssv_sp_parms(argp, exid);
2548aa78
CL		 1539 if (status)
1540 return status;
0733d213
AA		 1541 break;
1542 default:
523ec6ed 1543 return nfserr_bad_xdr;
0733d213
AA		 1544 }
1545
523ec6ed
CL		 1546 return nfs_ok;
1547}
1548
10ff8422
CL		 1549static __be32
1550nfsd4_decode_nfs_impl_id4(struct nfsd4_compoundargs *argp,
1551 struct nfsd4_exchange_id *exid)
1552{
1553 __be32 status;
1554 u32 count;
1555
1556 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1557 return nfserr_bad_xdr;
1558 switch (count) {
1559 case 0:
1560 break;
1561 case 1:
1562 /* Note that RFC 8881 places no length limit on
1563 * nii_domain, but this implementation permits no
1564 * more than NFS4_OPAQUE_LIMIT bytes */
1565 status = nfsd4_decode_opaque(argp, &exid->nii_domain);
1566 if (status)
1567 return status;
1568 /* Note that RFC 8881 places no length limit on
1569 * nii_name, but this implementation permits no
1570 * more than NFS4_OPAQUE_LIMIT bytes */
1571 status = nfsd4_decode_opaque(argp, &exid->nii_name);
1572 if (status)
1573 return status;
1574 status = nfsd4_decode_nfstime4(argp, &exid->nii_time);
1575 if (status)
1576 return status;
1577 break;
1578 default:
1579 return nfserr_bad_xdr;
1580 }
1581
1582 return nfs_ok;
1583}
1584
523ec6ed
CL		 1585static __be32
1586nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1587 struct nfsd4_exchange_id *exid)
1588{
10ff8422 1589 __be32 status;
523ec6ed
CL		 1590
1591 status = nfsd4_decode_verifier4(argp, &exid->verifier);
1592 if (status)
1593 return status;
1594 status = nfsd4_decode_opaque(argp, &exid->clname);
1595 if (status)
1596 return status;
1597 if (xdr_stream_decode_u32(argp->xdr, &exid->flags) < 0)
1598 return nfserr_bad_xdr;
1599 status = nfsd4_decode_state_protect4_a(argp, exid);
1600 if (status)
1601 return status;
10ff8422 1602 return nfsd4_decode_nfs_impl_id4(argp, exid);
2db134eb
AA		 1603}
1604
3a3f1fba
CL		 1605static __be32
1606nfsd4_decode_channel_attrs4(struct nfsd4_compoundargs *argp,
1607 struct nfsd4_channel_attrs *ca)
1608{
1609 __be32 *p;
1610
1611 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 7);
1612 if (!p)
1613 return nfserr_bad_xdr;
1614
1615 /* headerpadsz is ignored */
1616 p++;
1617 ca->maxreq_sz = be32_to_cpup(p++);
1618 ca->maxresp_sz = be32_to_cpup(p++);
1619 ca->maxresp_cached = be32_to_cpup(p++);
1620 ca->maxops = be32_to_cpup(p++);
1621 ca->maxreqs = be32_to_cpup(p++);
1622 ca->nr_rdma_attrs = be32_to_cpup(p);
1623 switch (ca->nr_rdma_attrs) {
1624 case 0:
1625 break;
1626 case 1:
1627 if (xdr_stream_decode_u32(argp->xdr, &ca->rdma_attrs) < 0)
1628 return nfserr_bad_xdr;
1629 break;
1630 default:
1631 return nfserr_bad_xdr;
1632 }
1633
1634 return nfs_ok;
1635}
1636
2db134eb
AA		 1637static __be32
1638nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1639 struct nfsd4_create_session *sess)
1640{
81243e3f 1641 __be32 status;
ec6b5d7b 1642
81243e3f
CL		 1643 status = nfsd4_decode_clientid4(argp, &sess->clientid);
1644 if (status)
1645 return status;
1646 if (xdr_stream_decode_u32(argp->xdr, &sess->seqid) < 0)
1647 return nfserr_bad_xdr;
1648 if (xdr_stream_decode_u32(argp->xdr, &sess->flags) < 0)
1649 return nfserr_bad_xdr;
3a3f1fba
CL		 1650 status = nfsd4_decode_channel_attrs4(argp, &sess->fore_channel);
1651 if (status)
1652 return status;
1653 status = nfsd4_decode_channel_attrs4(argp, &sess->back_channel);
81243e3f
CL		 1654 if (status)
1655 return status;
1656 if (xdr_stream_decode_u32(argp->xdr, &sess->callback_prog) < 0)
1657 return nfserr_bad_xdr;
1658 status = nfsd4_decode_cb_sec(argp, &sess->cb_sec);
3a3f1fba
CL		 1659 if (status)
1660 return status;
ec6b5d7b 1661
81243e3f 1662 return nfs_ok;
2db134eb
AA		 1663}
1664
1665static __be32
1666nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1667 struct nfsd4_destroy_session *destroy_session)
1668{
94e254af 1669 return nfsd4_decode_sessionid4(argp, &destroy_session->sessionid);
2db134eb
AA		 1670}
1671
e1ca12df
BS		 1672static __be32
1673nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1674 struct nfsd4_free_stateid *free_stateid)
1675{
aec387d5 1676 return nfsd4_decode_stateid4(argp, &free_stateid->fr_stateid);
e1ca12df
BS		 1677}
1678
9cf514cc
CH		 1679#ifdef CONFIG_NFSD_PNFS
1680static __be32
1681nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1682 struct nfsd4_getdeviceinfo *gdev)
1683{
04495971
CL		 1684 __be32 status;
1685
1686 status = nfsd4_decode_deviceid4(argp, &gdev->gd_devid);
1687 if (status)
1688 return status;
1689 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_layout_type) < 0)
1690 return nfserr_bad_xdr;
1691 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_maxcount) < 0)
1692 return nfserr_bad_xdr;
1693 if (xdr_stream_decode_uint32_array(argp->xdr,
1694 &gdev->gd_notify_types, 1) < 0)
1695 return nfserr_bad_xdr;
1696
1697 return nfs_ok;
9cf514cc
CH		 1698}
1699
5185980d
CL		 1700static __be32
1701nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1702 struct nfsd4_layoutcommit *lcp)
1703{
1704 __be32 *p, status;
1705
1706 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.offset) < 0)
1707 return nfserr_bad_xdr;
1708 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.length) < 0)
1709 return nfserr_bad_xdr;
1710 if (xdr_stream_decode_bool(argp->xdr, &lcp->lc_reclaim) < 0)
1711 return nfserr_bad_xdr;
1712 status = nfsd4_decode_stateid4(argp, &lcp->lc_sid);
1713 if (status)
1714 return status;
1715 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_newoffset) < 0)
1716 return nfserr_bad_xdr;
1717 if (lcp->lc_newoffset) {
1718 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_last_wr) < 0)
1719 return nfserr_bad_xdr;
1720 } else
1721 lcp->lc_last_wr = 0;
1722 p = xdr_inline_decode(argp->xdr, XDR_UNIT);
1723 if (!p)
1724 return nfserr_bad_xdr;
1725 if (xdr_item_is_present(p)) {
1726 status = nfsd4_decode_nfstime4(argp, &lcp->lc_mtime);
1727 if (status)
1728 return status;
1729 } else {
1730 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1731 }
1732 return nfsd4_decode_layoutupdate4(argp, lcp);
1733}
1734
9cf514cc
CH		 1735static __be32
1736nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1737 struct nfsd4_layoutget *lgp)
1738{
c8e88e3a 1739 __be32 status;
db59c0ef 1740
c8e88e3a
CL		 1741 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_signal) < 0)
1742 return nfserr_bad_xdr;
1743 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_layout_type) < 0)
1744 return nfserr_bad_xdr;
1745 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_seg.iomode) < 0)
1746 return nfserr_bad_xdr;
1747 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.offset) < 0)
1748 return nfserr_bad_xdr;
1749 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.length) < 0)
1750 return nfserr_bad_xdr;
1751 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_minlength) < 0)
1752 return nfserr_bad_xdr;
1753 status = nfsd4_decode_stateid4(argp, &lgp->lg_sid);
db59c0ef
KM		 1754 if (status)
1755 return status;
c8e88e3a
CL		 1756 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_maxcount) < 0)
1757 return nfserr_bad_xdr;
db59c0ef 1758
c8e88e3a 1759 return nfs_ok;
9cf514cc
CH		 1760}
1761
9cf514cc
CH		 1762static __be32
1763nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1764 struct nfsd4_layoutreturn *lrp)
1765{
645fcad3
CL		 1766 if (xdr_stream_decode_bool(argp->xdr, &lrp->lr_reclaim) < 0)
1767 return nfserr_bad_xdr;
1768 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_layout_type) < 0)
1769 return nfserr_bad_xdr;
1770 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_seg.iomode) < 0)
1771 return nfserr_bad_xdr;
1772 return nfsd4_decode_layoutreturn4(argp, lrp);
9cf514cc
CH		 1773}
1774#endif /* CONFIG_NFSD_PNFS */
1775
53d70873
CL		 1776static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1777 struct nfsd4_secinfo_no_name *sin)
1778{
1779 if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0)
1780 return nfserr_bad_xdr;
1781 return nfs_ok;
1782}
1783
cf907b11
CL		 1784static __be32
1785nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1786 struct nfsd4_sequence *seq)
1787{
1788 __be32 *p, status;
1789
1790 status = nfsd4_decode_sessionid4(argp, &seq->sessionid);
1791 if (status)
1792 return status;
1793 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 4);
1794 if (!p)
1795 return nfserr_bad_xdr;
1796 seq->seqid = be32_to_cpup(p++);
1797 seq->slotid = be32_to_cpup(p++);
1798 seq->maxslots = be32_to_cpup(p++);
1799 seq->cachethis = be32_to_cpup(p);
1800
1801 return nfs_ok;
1802}
1803
b7a0c8f6
CL		 1804static __be32
1805nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1806{
1807 struct nfsd4_test_stateid_id *stateid;
1808 __be32 status;
1809 u32 i;
1810
1811 if (xdr_stream_decode_u32(argp->xdr, &test_stateid->ts_num_ids) < 0)
1812 return nfserr_bad_xdr;
1813
1814 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1815 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1816 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1817 if (!stateid)
1818 return nfserrno(-ENOMEM); /* XXX: not jukebox? */
1819 INIT_LIST_HEAD(&stateid->ts_id_list);
1820 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1821 status = nfsd4_decode_stateid4(argp, &stateid->ts_id_stateid);
1822 if (status)
1823 return status;
1824 }
1825
1826 return nfs_ok;
1827}
1828
c95f2ec3
CL		 1829static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp,
1830 struct nfsd4_destroy_clientid *dc)
1831{
1832 return nfsd4_decode_clientid4(argp, &dc->clientid);
1833}
1834
0d646784
CL		 1835static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp,
1836 struct nfsd4_reclaim_complete *rc)
1837{
1838 if (xdr_stream_decode_bool(argp->xdr, &rc->rca_one_fs) < 0)
1839 return nfserr_bad_xdr;
1840 return nfs_ok;
1841}
1842
95d871f0
AS		 1843static __be32
1844nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1845 struct nfsd4_fallocate *fallocate)
1846{
6aef27aa 1847 __be32 status;
95d871f0 1848
6aef27aa 1849 status = nfsd4_decode_stateid4(argp, &fallocate->falloc_stateid);
95d871f0
AS		 1850 if (status)
1851 return status;
6aef27aa
CL		 1852 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_offset) < 0)
1853 return nfserr_bad_xdr;
1854 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_length) < 0)
1855 return nfserr_bad_xdr;
95d871f0 1856
6aef27aa 1857 return nfs_ok;
95d871f0
AS		 1858}
1859
84e1b21d
OK		 1860static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
1861 struct nl4_server *ns)
1862{
84e1b21d 1863 struct nfs42_netaddr *naddr;
f49e4b4d 1864 __be32 *p;
84e1b21d 1865
f49e4b4d
CL		 1866 if (xdr_stream_decode_u32(argp->xdr, &ns->nl4_type) < 0)
1867 return nfserr_bad_xdr;
84e1b21d
OK		 1868
1869 /* currently support for 1 inter-server source server */
1870 switch (ns->nl4_type) {
1871 case NL4_NETADDR:
1872 naddr = &ns->u.nl4_addr;
1873
f49e4b4d
CL		 1874 if (xdr_stream_decode_u32(argp->xdr, &naddr->netid_len) < 0)
1875 return nfserr_bad_xdr;
84e1b21d 1876 if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
f49e4b4d 1877 return nfserr_bad_xdr;
84e1b21d 1878
f49e4b4d
CL		 1879 p = xdr_inline_decode(argp->xdr, naddr->netid_len);
1880 if (!p)
1881 return nfserr_bad_xdr;
1882 memcpy(naddr->netid, p, naddr->netid_len);
84e1b21d 1883
f49e4b4d
CL		 1884 if (xdr_stream_decode_u32(argp->xdr, &naddr->addr_len) < 0)
1885 return nfserr_bad_xdr;
84e1b21d 1886 if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
f49e4b4d 1887 return nfserr_bad_xdr;
84e1b21d 1888
f49e4b4d
CL		 1889 p = xdr_inline_decode(argp->xdr, naddr->addr_len);
1890 if (!p)
1891 return nfserr_bad_xdr;
1892 memcpy(naddr->addr, p, naddr->addr_len);
84e1b21d
OK		 1893 break;
1894 default:
f49e4b4d 1895 return nfserr_bad_xdr;
84e1b21d 1896 }
f49e4b4d
CL		 1897
1898 return nfs_ok;
84e1b21d
OK		 1899}
1900
29ae7f9d
AS		 1901static __be32
1902nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1903{
84e1b21d 1904 struct nl4_server *ns_dummy;
e8febea7
CL		 1905 u32 consecutive, i, count;
1906 __be32 status;
29ae7f9d 1907
e8febea7 1908 status = nfsd4_decode_stateid4(argp, &copy->cp_src_stateid);
29ae7f9d
AS		 1909 if (status)
1910 return status;
e8febea7 1911 status = nfsd4_decode_stateid4(argp, &copy->cp_dst_stateid);
29ae7f9d
AS		 1912 if (status)
1913 return status;
e8febea7
CL		 1914 if (xdr_stream_decode_u64(argp->xdr, &copy->cp_src_pos) < 0)
1915 return nfserr_bad_xdr;
1916 if (xdr_stream_decode_u64(argp->xdr, &copy->cp_dst_pos) < 0)
1917 return nfserr_bad_xdr;
1918 if (xdr_stream_decode_u64(argp->xdr, &copy->cp_count) < 0)
1919 return nfserr_bad_xdr;
1920 /* ca_consecutive: we always do consecutive copies */
1921 if (xdr_stream_decode_u32(argp->xdr, &consecutive) < 0)
1922 return nfserr_bad_xdr;
1923 if (xdr_stream_decode_u32(argp->xdr, &copy->cp_synchronous) < 0)
1924 return nfserr_bad_xdr;
29ae7f9d 1925
e8febea7
CL		 1926 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1927 return nfserr_bad_xdr;
84e1b21d
OK		 1928 copy->cp_intra = false;
1929 if (count == 0) { /* intra-server copy */
1930 copy->cp_intra = true;
e8febea7 1931 return nfs_ok;
84e1b21d
OK		 1932 }
1933
e8febea7 1934 /* decode all the supplied server addresses but use only the first */
84e1b21d
OK		 1935 status = nfsd4_decode_nl4_server(argp, &copy->cp_src);
1936 if (status)
1937 return status;
1938
1939 ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
1940 if (ns_dummy == NULL)
e8febea7 1941 return nfserrno(-ENOMEM); /* XXX: jukebox? */
84e1b21d
OK		 1942 for (i = 0; i < count - 1; i++) {
1943 status = nfsd4_decode_nl4_server(argp, ns_dummy);
1944 if (status) {
1945 kfree(ns_dummy);
1946 return status;
1947 }
1948 }
1949 kfree(ns_dummy);
29ae7f9d 1950
e8febea7 1951 return nfs_ok;
29ae7f9d
AS		 1952}
1953
51911868
OK		 1954static __be32
1955nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
1956 struct nfsd4_copy_notify *cn)
1957{
5aff7d08 1958 __be32 status;
51911868 1959
f9a953fb 1960 status = nfsd4_decode_stateid4(argp, &cn->cpn_src_stateid);
51911868
OK		 1961 if (status)
1962 return status;
1963 return nfsd4_decode_nl4_server(argp, &cn->cpn_dst);
1964}
1965
f9a953fb
CL		 1966static __be32
1967nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
1968 struct nfsd4_offload_status *os)
1969{
2846bb05 1970 return nfsd4_decode_stateid4(argp, &os->stateid);
f9a953fb
CL		 1971}
1972
24bab491
AS		 1973static __be32
1974nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1975{
9d32b412 1976 __be32 status;
24bab491 1977
9d32b412 1978 status = nfsd4_decode_stateid4(argp, &seek->seek_stateid);
24bab491
AS		 1979 if (status)
1980 return status;
9d32b412
CL		 1981 if (xdr_stream_decode_u64(argp->xdr, &seek->seek_offset) < 0)
1982 return nfserr_bad_xdr;
1983 if (xdr_stream_decode_u32(argp->xdr, &seek->seek_whence) < 0)
1984 return nfserr_bad_xdr;
24bab491 1985
9d32b412 1986 return nfs_ok;
24bab491
AS		 1987}
1988
3dfd0b0e
CL		 1989static __be32
1990nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1991{
1992 __be32 status;
1993
1994 status = nfsd4_decode_stateid4(argp, &clone->cl_src_stateid);
1995 if (status)
1996 return status;
1997 status = nfsd4_decode_stateid4(argp, &clone->cl_dst_stateid);
1998 if (status)
1999 return status;
2000 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_src_pos) < 0)
2001 return nfserr_bad_xdr;
2002 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_dst_pos) < 0)
2003 return nfserr_bad_xdr;
2004 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_count) < 0)
2005 return nfserr_bad_xdr;
2006
2007 return nfs_ok;
2008}
2009
23e50fe3
FL		 2010/*
2011 * XDR data that is more than PAGE_SIZE in size is normally part of a
2012 * read or write. However, the size of extended attributes is limited
2013 * by the maximum request size, and then further limited by the underlying
2014 * filesystem limits. This can exceed PAGE_SIZE (currently, XATTR_SIZE_MAX
2015 * is 64k). Since there is no kvec- or page-based interface to xattrs,
2016 * and we're not dealing with contiguous pages, we need to do some copying.
2017 */
2018
2019/*
c1346a12 2020 * Decode data into buffer.
23e50fe3
FL		 2021 */
2022static __be32
c1346a12
CL		 2023nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct xdr_buf *xdr,
2024 char **bufp, u32 buflen)
23e50fe3 2025{
c1346a12
CL		 2026 struct page **pages = xdr->pages;
2027 struct kvec *head = xdr->head;
23e50fe3
FL		 2028 char *tmp, *dp;
2029 u32 len;
2030
2031 if (buflen <= head->iov_len) {
2032 /*
2033 * We're in luck, the head has enough space. Just return
2034 * the head, no need for copying.
2035 */
2036 *bufp = head->iov_base;
2037 return 0;
2038 }
2039
2040 tmp = svcxdr_tmpalloc(argp, buflen);
2041 if (tmp == NULL)
2042 return nfserr_jukebox;
2043
2044 dp = tmp;
2045 memcpy(dp, head->iov_base, head->iov_len);
2046 buflen -= head->iov_len;
2047 dp += head->iov_len;
2048
2049 while (buflen > 0) {
2050 len = min_t(u32, buflen, PAGE_SIZE);
2051 memcpy(dp, page_address(*pages), len);
2052
2053 buflen -= len;
2054 dp += len;
2055 pages++;
2056 }
2057
2058 *bufp = tmp;
2059 return 0;
2060}
2061
2062/*
2063 * Get a user extended attribute name from the XDR buffer.
2064 * It will not have the "user." prefix, so prepend it.
2065 * Lastly, check for nul characters in the name.
2066 */
2067static __be32
2068nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep)
2069{
23e50fe3
FL		 2070 char *name, *sp, *dp;
2071 u32 namelen, cnt;
830c7150 2072 __be32 *p;
23e50fe3 2073
830c7150
CL		 2074 if (xdr_stream_decode_u32(argp->xdr, &namelen) < 0)
2075 return nfserr_bad_xdr;
23e50fe3
FL		 2076 if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN))
2077 return nfserr_nametoolong;
23e50fe3 2078 if (namelen == 0)
830c7150
CL		 2079 return nfserr_bad_xdr;
2080 p = xdr_inline_decode(argp->xdr, namelen);
2081 if (!p)
2082 return nfserr_bad_xdr;
23e50fe3
FL		 2083 name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1);
2084 if (!name)
2085 return nfserr_jukebox;
23e50fe3
FL		 2086 memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2087
2088 /*
2089 * Copy the extended attribute name over while checking for 0
2090 * characters.
2091 */
2092 sp = (char *)p;
2093 dp = name + XATTR_USER_PREFIX_LEN;
2094 cnt = namelen;
2095
2096 while (cnt-- > 0) {
2097 if (*sp == '\0')
830c7150 2098 return nfserr_bad_xdr;
23e50fe3
FL		 2099 *dp++ = *sp++;
2100 }
2101 *dp = '\0';
2102
2103 *namep = name;
2104
830c7150 2105 return nfs_ok;
23e50fe3
FL		 2106}
2107
2108/*
2109 * A GETXATTR op request comes without a length specifier. We just set the
2110 * maximum length for the reply based on XATTR_SIZE_MAX and the maximum
2111 * channel reply size. nfsd_getxattr will probe the length of the xattr,
2112 * check it against getxa_len, and allocate + return the value.
2113 */
2114static __be32
2115nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp,
2116 struct nfsd4_getxattr *getxattr)
2117{
2118 __be32 status;
2119 u32 maxcount;
2120
2121 status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name);
2122 if (status)
2123 return status;
2124
2125 maxcount = svc_max_payload(argp->rqstp);
2126 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2127
2128 getxattr->getxa_len = maxcount;
2129
2130 return status;
2131}
2132
2133static __be32
2134nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp,
2135 struct nfsd4_setxattr *setxattr)
2136{
23e50fe3 2137 u32 flags, maxcount, size;
403366a7 2138 __be32 status;
23e50fe3 2139
403366a7
CL		 2140 if (xdr_stream_decode_u32(argp->xdr, &flags) < 0)
2141 return nfserr_bad_xdr;
23e50fe3
FL		 2142
2143 if (flags > SETXATTR4_REPLACE)
2144 return nfserr_inval;
2145 setxattr->setxa_flags = flags;
2146
2147 status = nfsd4_decode_xattr_name(argp, &setxattr->setxa_name);
2148 if (status)
2149 return status;
2150
2151 maxcount = svc_max_payload(argp->rqstp);
2152 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2153
403366a7
CL		 2154 if (xdr_stream_decode_u32(argp->xdr, &size) < 0)
2155 return nfserr_bad_xdr;
23e50fe3
FL		 2156 if (size > maxcount)
2157 return nfserr_xattr2big;
2158
2159 setxattr->setxa_len = size;
2160 if (size > 0) {
c1346a12 2161 struct xdr_buf payload;
23e50fe3 2162
c1346a12 2163 if (!xdr_stream_subsegment(argp->xdr, &payload, size))
403366a7 2164 return nfserr_bad_xdr;
c1346a12
CL		 2165 status = nfsd4_vbuf_from_vector(argp, &payload,
2166 &setxattr->setxa_buf, size);
23e50fe3
FL		 2167 }
2168
403366a7 2169 return nfs_ok;
23e50fe3
FL		 2170}
2171
2172static __be32
2173nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp,
2174 struct nfsd4_listxattrs *listxattrs)
2175{
23e50fe3
FL		 2176 u32 maxcount;
2177
2212036c
CL		 2178 if (xdr_stream_decode_u64(argp->xdr, &listxattrs->lsxa_cookie) < 0)
2179 return nfserr_bad_xdr;
23e50fe3
FL		 2180
2181 /*
2182 * If the cookie is too large to have even one user.x attribute
2183 * plus trailing '\0' left in a maximum size buffer, it's invalid.
2184 */
2185 if (listxattrs->lsxa_cookie >=
2186 (XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2)))
2187 return nfserr_badcookie;
2188
2212036c
CL		 2189 if (xdr_stream_decode_u32(argp->xdr, &maxcount) < 0)
2190 return nfserr_bad_xdr;
23e50fe3
FL		 2191 if (maxcount < 8)
2192 /* Always need at least 2 words (length and one character) */
2193 return nfserr_inval;
2194
2195 maxcount = min(maxcount, svc_max_payload(argp->rqstp));
2196 listxattrs->lsxa_maxcount = maxcount;
2197
2212036c 2198 return nfs_ok;
23e50fe3
FL		 2199}
2200
2201static __be32
2202nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp,
2203 struct nfsd4_removexattr *removexattr)
2204{
2205 return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name);
2206}
2207
347e0ad9
BH		 2208static __be32
2209nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
2210{
2211 return nfs_ok;
2212}
2213
3c375c6f
BH		 2214static __be32
2215nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
2216{
1e685ec2 2217 return nfserr_notsupp;
3c375c6f
BH		 2218}
2219
347e0ad9
BH		 2220typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
2221
c1df609d 2222static const nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 2223 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
2224 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
2225 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
2226 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
2227 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
2228 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
2229 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
2230 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
2231 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
2232 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
2233 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
2234 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
2235 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
2236 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
2237 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2238 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
2239 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
2240 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
2241 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
2242 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 2243 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 2244 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
2245 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
2246 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
2247 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
2248 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
2249 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
2250 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
2251 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
2252 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
2253 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
2254 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
2255 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
2256 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
2257 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2258 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
2259 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 2260
2261 /* new operations for NFSv4.1 */
cb73a9f4 2262 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 2263 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 2264 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
2265 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
2266 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 2267 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae 2268 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc
CH		 2269#ifdef CONFIG_NFSD_PNFS
2270 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
2271 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2272 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
2273 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
2274 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
2275#else
9064caae
RD		 2276 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
2277 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2278 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
2279 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
2280 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc 2281#endif
04f4ad16 2282 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 2283 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
2284 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 2285 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 2286 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 2287 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 2288 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
87a15a80
AS		 2289
2290 /* new operations for NFSv4.2 */
95d871f0 2291 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
29ae7f9d 2292 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
51911868 2293 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_copy_notify,
b0cb9085 2294 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
87a15a80
AS		 2295 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
2296 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
2297 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
885e2bf3 2298 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status,
6308bc98 2299 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status,
528b8493 2300 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_read,
24bab491 2301 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
87a15a80 2302 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
ffa0160a 2303 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
23e50fe3
FL		 2304 /* RFC 8276 extended atributes operations */
2305 [OP_GETXATTR] = (nfsd4_dec)nfsd4_decode_getxattr,
2306 [OP_SETXATTR] = (nfsd4_dec)nfsd4_decode_setxattr,
2307 [OP_LISTXATTRS] = (nfsd4_dec)nfsd4_decode_listxattrs,
2308 [OP_REMOVEXATTR] = (nfsd4_dec)nfsd4_decode_removexattr,
2db134eb
AA		 2309};
2310
e1a90ebd
AS		 2311static inline bool
2312nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
2313{
8217d146 2314 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 2315 return false;
8217d146 2316 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 2317 return false;
8217d146
AS		 2318 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
2319 return false;
2320 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 2321 return false;
2322 return true;
2323}
f2feb96b 2324
d9b74bda 2325static int
1da177e4
LT		 2326nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
2327{
1da177e4 2328 struct nfsd4_op *op;
1091006c 2329 bool cachethis = false;
a5cddc88
BF		 2330 int auth_slack= argp->rqstp->rq_auth_slack;
2331 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 2332 int readcount = 0;
2333 int readbytes = 0;
d9b74bda 2334 __be32 *p;
1da177e4
LT		 2335 int i;
2336
d9b74bda
CL		 2337 if (xdr_stream_decode_u32(argp->xdr, &argp->taglen) < 0)
2338 return 0;
2339 max_reply += XDR_UNIT;
2340 argp->tag = NULL;
2341 if (unlikely(argp->taglen)) {
2342 if (argp->taglen > NFSD4_MAX_TAGLEN)
2343 return 0;
2344 p = xdr_inline_decode(argp->xdr, argp->taglen);
2345 if (!p)
2346 return 0;
7b723008 2347 argp->tag = svcxdr_savemem(argp, p, argp->taglen);
d9b74bda
CL		 2348 if (!argp->tag)
2349 return 0;
d9b74bda
CL		 2350 max_reply += xdr_align_size(argp->taglen);
2351 }
2352
2353 if (xdr_stream_decode_u32(argp->xdr, &argp->minorversion) < 0)
2354 return 0;
2355 if (xdr_stream_decode_u32(argp->xdr, &argp->opcnt) < 0)
2356 return 0;
2357
0078117c
BF		 2358 /*
2359 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
2360 * here, so we return success at the xdr level so that
2361 * nfsd4_proc can handle this is an NFS-level error.
2362 */
2363 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
d9b74bda 2364 return 1;
1da177e4 2365
e8c96f8c 2366 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
5d6031ca 2367 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1da177e4
LT		 2368 if (!argp->ops) {
2369 argp->ops = argp->iops;
817cb9d4 2370 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
d9b74bda 2371 return 0;
1da177e4
LT		 2372 }
2373 }
2374
e1a90ebd 2375 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 2376 argp->opcnt = 0;
2377
1da177e4
LT		 2378 for (i = 0; i < argp->opcnt; i++) {
2379 op = &argp->ops[i];
2380 op->replay = NULL;
2381
3a237b4a 2382 if (xdr_stream_decode_u32(argp->xdr, &op->opnum) < 0)
d9b74bda 2383 return 0;
08281341 2384 if (nfsd4_opnum_in_range(argp, op)) {
e1a90ebd 2385 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
08281341
CL		 2386 if (op->status != nfs_ok)
2387 trace_nfsd_compound_decode_err(argp->rqstp,
2388 argp->opcnt, i,
2389 op->opnum,
2390 op->status);
2391 } else {
1da177e4
LT		 2392 op->opnum = OP_ILLEGAL;
2393 op->status = nfserr_op_illegal;
1da177e4 2394 }
f4f9ef4a 2395 op->opdesc = OPDESC(op);
1091006c
BF		 2396 /*
2397 * We'll try to cache the result in the DRC if any one
2398 * op in the compound wants to be cached:
2399 */
2400 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 2401
528b8493 2402 if (op->opnum == OP_READ || op->opnum == OP_READ_PLUS) {
b0e35fda
BF		 2403 readcount++;
2404 readbytes += nfsd4_max_reply(argp->rqstp, op);
2405 } else
2406 max_reply += nfsd4_max_reply(argp->rqstp, op);
f7b43d0c 2407 /*
7323f0d2
KM		 2408 * OP_LOCK and OP_LOCKT may return a conflicting lock.
2409 * (Special case because it will just skip encoding this
2410 * if it runs out of xdr buffer space, and it is the only
2411 * operation that behaves this way.)
f7b43d0c 2412 */
7323f0d2 2413 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
f7b43d0c 2414 max_reply += NFS4_OPAQUE_LIMIT;
e372ba60
BF		 2415
2416 if (op->status) {
2417 argp->opcnt = i+1;
2418 break;
2419 }
1da177e4 2420 }
1091006c
BF		 2421 /* Sessions make the DRC unnecessary: */
2422 if (argp->minorversion)
2423 cachethis = false;
b0e35fda 2424 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 2425 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 2426
a5cddc88 2427 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
779fb0f3 2428 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
b0e35fda 2429
d9b74bda 2430 return 1;
1da177e4 2431}
1da177e4 2432
b8800921
N		 2433static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
2434 struct svc_export *exp)
c654b8a9 2435{
b8800921
N		 2436 if (exp->ex_flags & NFSEXP_V4ROOT) {
2437 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
2438 *p++ = 0;
70b87f77 2439 } else
39ca1bf6 2440 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
d05d5744 2441 return p;
c654b8a9
BF		 2442}
2443
16945141
BF		 2444/*
2445 * ctime (in NFSv4, time_metadata) is not writeable, and the client
2446 * doesn't really care what resolution could theoretically be stored by
2447 * the filesystem.
2448 *
2449 * The client cares how close together changes can be while still
2450 * guaranteeing ctime changes. For most filesystems (which have
2451 * timestamps with nanosecond fields) that is limited by the resolution
2452 * of the time returned from current_time() (which I'm assuming to be
2453 * 1/HZ).
2454 */
2455static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
2456{
e4598e38 2457 struct timespec64 ts;
16945141
BF		 2458 u32 ns;
2459
2460 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
e4598e38 2461 ts = ns_to_timespec64(ns);
16945141
BF		 2462
2463 p = xdr_encode_hyper(p, ts.tv_sec);
2464 *p++ = cpu_to_be32(ts.tv_nsec);
2465
2466 return p;
2467}
2468
d05d5744 2469static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 2470{
d05d5744 2471 *p++ = cpu_to_be32(c->atomic);
b2140338
BF		 2472 p = xdr_encode_hyper(p, c->before_change);
2473 p = xdr_encode_hyper(p, c->after_change);
d05d5744 2474 return p;
c654b8a9 2475}
1da177e4 2476
81c3f413 2477/* Encode as an array of strings the string given with components
e7a0444a 2478 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 2479 */
ddd1ea56
BF		 2480static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2481 char *components, char esc_enter,
2482 char esc_exit)
81c3f413 2483{
ddd1ea56 2484 __be32 *p;
082d4bd7
BF		 2485 __be32 pathlen;
2486 int pathlen_offset;
81c3f413 2487 int strlen, count=0;
e7a0444a 2488 char *str, *end, *next;
81c3f413
BF		 2489
2490 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 2491
2492 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 2493 p = xdr_reserve_space(xdr, 4);
2494 if (!p)
81c3f413 2495 return nfserr_resource;
082d4bd7
BF		 2496 p++; /* We will fill this in with @count later */
2497
81c3f413
BF		 2498 end = str = components;
2499 while (*end) {
e7a0444a
WAA		 2500 bool found_esc = false;
2501
2502 /* try to parse as esc_start, ..., esc_end, sep */
2503 if (*str == esc_enter) {
2504 for (; *end && (*end != esc_exit); end++)
2505 /* find esc_exit or end of string */;
2506 next = end + 1;
2507 if (*end && (!*next || *next == sep)) {
2508 str++;
2509 found_esc = true;
2510 }
2511 }
2512
2513 if (!found_esc)
2514 for (; *end && (*end != sep); end++)
2515 /* find sep or end of string */;
2516
81c3f413
BF		 2517 strlen = end - str;
2518 if (strlen) {
ddd1ea56
BF		 2519 p = xdr_reserve_space(xdr, strlen + 4);
2520 if (!p)
81c3f413 2521 return nfserr_resource;
0c0c267b 2522 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 2523 count++;
2524 }
2525 else
2526 end++;
5a64e569
BC		 2527 if (found_esc)
2528 end = next;
2529
81c3f413
BF		 2530 str = end;
2531 }
bf7491f1 2532 pathlen = htonl(count);
082d4bd7 2533 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 2534 return 0;
2535}
2536
e7a0444a
WAA		 2537/* Encode as an array of strings the string given with components
2538 * separated @sep.
2539 */
ddd1ea56
BF		 2540static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2541 char *components)
e7a0444a 2542{
ddd1ea56 2543 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 2544}
2545
81c3f413
BF		 2546/*
2547 * encode a location element of a fs_locations structure
2548 */
ddd1ea56
BF		 2549static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2550 struct nfsd4_fs_location *location)
81c3f413 2551{
b37ad28b 2552 __be32 status;
81c3f413 2553
ddd1ea56 2554 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 2555 '[', ']');
81c3f413
BF		 2556 if (status)
2557 return status;
ddd1ea56 2558 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 2559 if (status)
2560 return status;
81c3f413
BF		 2561 return 0;
2562}
2563
2564/*
ed748aac 2565 * Encode a path in RFC3530 'pathname4' format
81c3f413 2566 */
ddd1ea56
BF		 2567static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2568 const struct path *root,
2569 const struct path *path)
81c3f413 2570{
301f0268 2571 struct path cur = *path;
ddd1ea56 2572 __be32 *p;
ed748aac
TM		 2573 struct dentry **components = NULL;
2574 unsigned int ncomponents = 0;
2575 __be32 err = nfserr_jukebox;
81c3f413 2576
ed748aac 2577 dprintk("nfsd4_encode_components(");
81c3f413 2578
ed748aac
TM		 2579 path_get(&cur);
2580 /* First walk the path up to the nfsd root, and store the
2581 * dentries/path components in an array.
2582 */
2583 for (;;) {
b77a4b2e 2584 if (path_equal(&cur, root))
ed748aac
TM		 2585 break;
2586 if (cur.dentry == cur.mnt->mnt_root) {
2587 if (follow_up(&cur))
2588 continue;
2589 goto out_free;
2590 }
2591 if ((ncomponents & 15) == 0) {
2592 struct dentry **new;
2593 new = krealloc(components,
2594 sizeof(*new) * (ncomponents + 16),
2595 GFP_KERNEL);
2596 if (!new)
2597 goto out_free;
2598 components = new;
2599 }
2600 components[ncomponents++] = cur.dentry;
2601 cur.dentry = dget_parent(cur.dentry);
2602 }
ddd1ea56
BF		 2603 err = nfserr_resource;
2604 p = xdr_reserve_space(xdr, 4);
2605 if (!p)
ed748aac 2606 goto out_free;
c373b0a4 2607 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 2608
2609 while (ncomponents) {
2610 struct dentry *dentry = components[ncomponents - 1];
301f0268 2611 unsigned int len;
ed748aac 2612
301f0268
AV		 2613 spin_lock(&dentry->d_lock);
2614 len = dentry->d_name.len;
ddd1ea56
BF		 2615 p = xdr_reserve_space(xdr, len + 4);
2616 if (!p) {
301f0268 2617 spin_unlock(&dentry->d_lock);
ed748aac 2618 goto out_free;
301f0268 2619 }
0c0c267b 2620 p = xdr_encode_opaque(p, dentry->d_name.name, len);
a455589f 2621 dprintk("/%pd", dentry);
301f0268 2622 spin_unlock(&dentry->d_lock);
ed748aac
TM		 2623 dput(dentry);
2624 ncomponents--;
81c3f413 2625 }
ed748aac 2626
ed748aac
TM		 2627 err = 0;
2628out_free:
2629 dprintk(")\n");
2630 while (ncomponents)
2631 dput(components[--ncomponents]);
2632 kfree(components);
2633 path_put(&cur);
2634 return err;
2635}
2636
ddd1ea56
BF		 2637static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2638 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 2639{
2640 struct svc_export *exp_ps;
2641 __be32 res;
2642
2643 exp_ps = rqst_find_fsidzero_export(rqstp);
2644 if (IS_ERR(exp_ps))
2645 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 2646 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 2647 exp_put(exp_ps);
2648 return res;
81c3f413
BF		 2649}
2650
2651/*
2652 * encode a fs_locations structure
2653 */
ddd1ea56
BF		 2654static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2655 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 2656{
b37ad28b 2657 __be32 status;
cc45f017 2658 int i;
ddd1ea56 2659 __be32 *p;
81c3f413 2660 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 2661
ddd1ea56 2662 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 2663 if (status)
2664 return status;
ddd1ea56
BF		 2665 p = xdr_reserve_space(xdr, 4);
2666 if (!p)
81c3f413 2667 return nfserr_resource;
c373b0a4 2668 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 2669 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 2670 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 2671 if (status)
2672 return status;
2673 }
81c3f413
BF		 2674 return 0;
2675}
1da177e4 2676
3d2544b1
BF		 2677static u32 nfs4_file_type(umode_t mode)
2678{
2679 switch (mode & S_IFMT) {
2680 case S_IFIFO: return NF4FIFO;
2681 case S_IFCHR: return NF4CHR;
2682 case S_IFDIR: return NF4DIR;
2683 case S_IFBLK: return NF4BLK;
2684 case S_IFLNK: return NF4LNK;
2685 case S_IFREG: return NF4REG;
2686 case S_IFSOCK: return NF4SOCK;
2687 default: return NF4BAD;
25fef48b 2688 }
3d2544b1 2689}
1da177e4 2690
b37ad28b 2691static inline __be32
ddd1ea56
BF		 2692nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2693 struct nfs4_ace *ace)
1da177e4 2694{
3554116d 2695 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 2696 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 2697 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 2698 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 2699 else
ddd1ea56 2700 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 2701}
2702
6896f15a 2703static inline __be32
8a4c3926 2704nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
6896f15a 2705{
8a4c3926
JL		 2706 __be32 *p;
2707 unsigned long i = hweight_long(layout_types);
6896f15a 2708
8a4c3926
JL		 2709 p = xdr_reserve_space(xdr, 4 + 4 * i);
2710 if (!p)
2711 return nfserr_resource;
2712
2713 *p++ = cpu_to_be32(i);
2714
2715 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2716 if (layout_types & (1 << i))
2717 *p++ = cpu_to_be32(i);
6896f15a
KM		 2718
2719 return 0;
2720}
2721
42ca0993
BF		 2722#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2723 FATTR4_WORD0_RDATTR_ERROR)
2724#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
c2227a39 2725#define WORD2_ABSENT_FS_ATTRS 0
42ca0993 2726
18032ca0
DQ		 2727#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2728static inline __be32
ddd1ea56
BF		 2729nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2730 void *context, int len)
18032ca0 2731{
ddd1ea56 2732 __be32 *p;
18032ca0 2733
ddd1ea56
BF		 2734 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2735 if (!p)
18032ca0
DQ		 2736 return nfserr_resource;
2737
2738 /*
2739 * For now we use a 0 here to indicate the null translation; in
2740 * the future we may place a call to translation code here.
2741 */
c373b0a4
BF		 2742 *p++ = cpu_to_be32(0); /* lfs */
2743 *p++ = cpu_to_be32(0); /* pi */
18032ca0 2744 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 2745 return 0;
2746}
2747#else
2748static inline __be32
ddd1ea56
BF		 2749nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2750 void *context, int len)
18032ca0
DQ		 2751{ return 0; }
2752#endif
2753
c2227a39 2754static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
42ca0993
BF		 2755{
2756 /* As per referral draft: */
2757 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2758 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2759 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2760 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2761 *rdattr_err = NFSERR_MOVED;
2762 else
2763 return nfserr_moved;
2764 }
2765 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2766 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
c2227a39 2767 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
42ca0993
BF		 2768 return 0;
2769}
1da177e4 2770
ae7095a7
BF		 2771
2772static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2773{
2774 struct path path = exp->ex_path;
2775 int err;
2776
2777 path_get(&path);
2778 while (follow_up(&path)) {
2779 if (path.dentry != path.mnt->mnt_root)
2780 break;
2781 }
a528d35e 2782 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
ae7095a7
BF		 2783 path_put(&path);
2784 return err;
2785}
2786
75976de6
KM		 2787static __be32
2788nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2789{
2790 __be32 *p;
2791
2792 if (bmval2) {
2793 p = xdr_reserve_space(xdr, 16);
2794 if (!p)
2795 goto out_resource;
2796 *p++ = cpu_to_be32(3);
2797 *p++ = cpu_to_be32(bmval0);
2798 *p++ = cpu_to_be32(bmval1);
2799 *p++ = cpu_to_be32(bmval2);
2800 } else if (bmval1) {
2801 p = xdr_reserve_space(xdr, 12);
2802 if (!p)
2803 goto out_resource;
2804 *p++ = cpu_to_be32(2);
2805 *p++ = cpu_to_be32(bmval0);
2806 *p++ = cpu_to_be32(bmval1);
2807 } else {
2808 p = xdr_reserve_space(xdr, 8);
2809 if (!p)
2810 goto out_resource;
2811 *p++ = cpu_to_be32(1);
2812 *p++ = cpu_to_be32(bmval0);
2813 }
2814
2815 return 0;
2816out_resource:
2817 return nfserr_resource;
2818}
2819
1da177e4
LT		 2820/*
2821 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2822 * ourselves.
1da177e4 2823 */
da2ebce6 2824static __be32
d5184658
BF		 2825nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2826 struct svc_export *exp,
2827 struct dentry *dentry, u32 *bmval,
406a7ea9 2828 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2829{
2830 u32 bmval0 = bmval[0];
2831 u32 bmval1 = bmval[1];
7e705706 2832 u32 bmval2 = bmval[2];
1da177e4 2833 struct kstat stat;
d50e6136 2834 struct svc_fh *tempfh = NULL;
1da177e4 2835 struct kstatfs statfs;
ddd1ea56 2836 __be32 *p;
1fcea5b2 2837 int starting_len = xdr->buf->len;
082d4bd7
BF		 2838 int attrlen_offset;
2839 __be32 attrlen;
1da177e4
LT		 2840 u32 dummy;
2841 u64 dummy64;
42ca0993 2842 u32 rdattr_err = 0;
b37ad28b 2843 __be32 status;
b8dd7b9a 2844 int err;
1da177e4 2845 struct nfs4_acl *acl = NULL;
0ab88ca4 2846#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2847 void *context = NULL;
2848 int contextlen;
0ab88ca4 2849#endif
18032ca0 2850 bool contextsupport = false;
7e705706
AA		 2851 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2852 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2853 struct path path = {
2854 .mnt = exp->ex_path.mnt,
2855 .dentry = dentry,
2856 };
3d733711 2857 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2858
2859 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
916d2d84 2860 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
1da177e4 2861
42ca0993 2862 if (exp->ex_fslocs.migrated) {
c2227a39 2863 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
42ca0993
BF		 2864 if (status)
2865 goto out;
2866 }
2867
a528d35e 2868 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
b8dd7b9a 2869 if (err)
1da177e4 2870 goto out_nfserr;
12337901
CH		 2871 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2872 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2873 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2874 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2875 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2876 if (err)
1da177e4
LT		 2877 goto out_nfserr;
2878 }
2879 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2880 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2881 status = nfserr_jukebox;
2882 if (!tempfh)
2883 goto out;
2884 fh_init(tempfh, NFS4_FHSIZE);
2885 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2886 if (status)
2887 goto out;
d50e6136 2888 fhp = tempfh;
1da177e4 2889 }
0c9d65e7 2890 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2891 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
0c9d65e7
AG		 2892 if (err == -EOPNOTSUPP)
2893 bmval0 &= ~FATTR4_WORD0_ACL;
2894 else if (err == -EINVAL) {
2895 status = nfserr_attrnotsupp;
2896 goto out;
2897 } else if (err != 0)
2898 goto out_nfserr;
1da177e4 2899 }
1da177e4 2900
18032ca0 2901#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
c2227a39
KM		 2902 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2903 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
32ddd944
BF		 2904 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2905 err = security_inode_getsecctx(d_inode(dentry),
18032ca0 2906 &context, &contextlen);
32ddd944
BF		 2907 else
2908 err = -EOPNOTSUPP;
18032ca0
DQ		 2909 contextsupport = (err == 0);
2910 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2911 if (err == -EOPNOTSUPP)
2912 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2913 else if (err)
2914 goto out_nfserr;
2915 }
2916 }
2917#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2918
75976de6
KM		 2919 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2920 if (status)
2921 goto out;
082d4bd7
BF		 2922
2923 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2924 p = xdr_reserve_space(xdr, 4);
2925 if (!p)
2926 goto out_resource;
082d4bd7 2927 p++; /* to be backfilled later */
1da177e4
LT		 2928
2929 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
dcd20869
BF		 2930 u32 supp[3];
2931
2932 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
7e705706 2933
0c9d65e7 2934 if (!IS_POSIXACL(dentry->d_inode))
916d2d84 2935 supp[0] &= ~FATTR4_WORD0_ACL;
18032ca0 2936 if (!contextsupport)
916d2d84
BF		 2937 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2938 if (!supp[2]) {
ddd1ea56
BF		 2939 p = xdr_reserve_space(xdr, 12);
2940 if (!p)
2b44f1ba 2941 goto out_resource;
c373b0a4 2942 *p++ = cpu_to_be32(2);
916d2d84
BF		 2943 *p++ = cpu_to_be32(supp[0]);
2944 *p++ = cpu_to_be32(supp[1]);
7e705706 2945 } else {
ddd1ea56
BF		 2946 p = xdr_reserve_space(xdr, 16);
2947 if (!p)
2b44f1ba 2948 goto out_resource;
c373b0a4 2949 *p++ = cpu_to_be32(3);
916d2d84
BF		 2950 *p++ = cpu_to_be32(supp[0]);
2951 *p++ = cpu_to_be32(supp[1]);
2952 *p++ = cpu_to_be32(supp[2]);
7e705706 2953 }
1da177e4
LT		 2954 }
2955 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2956 p = xdr_reserve_space(xdr, 4);
2957 if (!p)
1da177e4 2958 goto out_resource;
3d2544b1 2959 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2960 if (dummy == NF4BAD) {
2961 status = nfserr_serverfault;
2962 goto out;
2963 }
c373b0a4 2964 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2965 }
2966 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2967 p = xdr_reserve_space(xdr, 4);
2968 if (!p)
1da177e4 2969 goto out_resource;
49640001 2970 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2971 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2972 else
c373b0a4
BF		 2973 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2974 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2975 }
2976 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2977 p = xdr_reserve_space(xdr, 8);
2978 if (!p)
1da177e4 2979 goto out_resource;
b8800921 2980 p = encode_change(p, &stat, d_inode(dentry), exp);
1da177e4
LT		 2981 }
2982 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2983 p = xdr_reserve_space(xdr, 8);
2984 if (!p)
1da177e4 2985 goto out_resource;
b64c7f3b 2986 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2987 }
2988 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2989 p = xdr_reserve_space(xdr, 4);
2990 if (!p)
1da177e4 2991 goto out_resource;
c373b0a4 2992 *p++ = cpu_to_be32(1);
1da177e4
LT		 2993 }
2994 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2995 p = xdr_reserve_space(xdr, 4);
2996 if (!p)
1da177e4 2997 goto out_resource;
c373b0a4 2998 *p++ = cpu_to_be32(1);
1da177e4
LT		 2999 }
3000 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 3001 p = xdr_reserve_space(xdr, 4);
3002 if (!p)
1da177e4 3003 goto out_resource;
c373b0a4 3004 *p++ = cpu_to_be32(0);
1da177e4
LT		 3005 }
3006 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 3007 p = xdr_reserve_space(xdr, 16);
3008 if (!p)
1da177e4 3009 goto out_resource;
42ca0993 3010 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 3011 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
3012 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 3013 } else switch(fsid_source(fhp)) {
3014 case FSIDSOURCE_FSID:
b64c7f3b
BF		 3015 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
3016 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 3017 break;
3018 case FSIDSOURCE_DEV:
c373b0a4
BF		 3019 *p++ = cpu_to_be32(0);
3020 *p++ = cpu_to_be32(MAJOR(stat.dev));
3021 *p++ = cpu_to_be32(0);
3022 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 3023 break;
3024 case FSIDSOURCE_UUID:
94eb3689
KM		 3025 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
3026 EX_UUID_LEN);
af6a4e28 3027 break;
1da177e4
LT		 3028 }
3029 }
3030 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 3031 p = xdr_reserve_space(xdr, 4);
3032 if (!p)
1da177e4 3033 goto out_resource;
c373b0a4 3034 *p++ = cpu_to_be32(0);
1da177e4
LT		 3035 }
3036 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 3037 p = xdr_reserve_space(xdr, 4);
3038 if (!p)
1da177e4 3039 goto out_resource;
c373b0a4 3040 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 3041 }
3042 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 3043 p = xdr_reserve_space(xdr, 4);
3044 if (!p)
1da177e4 3045 goto out_resource;
c373b0a4 3046 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 3047 }
3048 if (bmval0 & FATTR4_WORD0_ACL) {
3049 struct nfs4_ace *ace;
1da177e4
LT		 3050
3051 if (acl == NULL) {
ddd1ea56
BF		 3052 p = xdr_reserve_space(xdr, 4);
3053 if (!p)
1da177e4
LT		 3054 goto out_resource;
3055
c373b0a4 3056 *p++ = cpu_to_be32(0);
1da177e4
LT		 3057 goto out_acl;
3058 }
ddd1ea56
BF		 3059 p = xdr_reserve_space(xdr, 4);
3060 if (!p)
1da177e4 3061 goto out_resource;
c373b0a4 3062 *p++ = cpu_to_be32(acl->naces);
1da177e4 3063
28e05dd8 3064 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 3065 p = xdr_reserve_space(xdr, 4*3);
3066 if (!p)
1da177e4 3067 goto out_resource;
c373b0a4
BF		 3068 *p++ = cpu_to_be32(ace->type);
3069 *p++ = cpu_to_be32(ace->flag);
3070 *p++ = cpu_to_be32(ace->access_mask &
3071 NFS4_ACE_MASK_ALL);
ddd1ea56 3072 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 3073 if (status)
3074 goto out;
3075 }
3076 }
3077out_acl:
3078 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 3079 p = xdr_reserve_space(xdr, 4);
3080 if (!p)
1da177e4 3081 goto out_resource;
0c9d65e7 3082 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
1da177e4
LT		 3083 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
3084 }
3085 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 3086 p = xdr_reserve_space(xdr, 4);
3087 if (!p)
1da177e4 3088 goto out_resource;
c373b0a4 3089 *p++ = cpu_to_be32(1);
1da177e4
LT		 3090 }
3091 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 3092 p = xdr_reserve_space(xdr, 4);
3093 if (!p)
1da177e4 3094 goto out_resource;
c373b0a4 3095 *p++ = cpu_to_be32(0);
1da177e4
LT		 3096 }
3097 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 3098 p = xdr_reserve_space(xdr, 4);
3099 if (!p)
1da177e4 3100 goto out_resource;
c373b0a4 3101 *p++ = cpu_to_be32(1);
1da177e4
LT		 3102 }
3103 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 3104 p = xdr_reserve_space(xdr, 4);
3105 if (!p)
1da177e4 3106 goto out_resource;
c373b0a4 3107 *p++ = cpu_to_be32(1);
1da177e4
LT		 3108 }
3109 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 3110 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
3111 if (!p)
1da177e4 3112 goto out_resource;
0c0c267b
BF		 3113 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
3114 fhp->fh_handle.fh_size);
1da177e4
LT		 3115 }
3116 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 3117 p = xdr_reserve_space(xdr, 8);
3118 if (!p)
1da177e4 3119 goto out_resource;
b64c7f3b 3120 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 3121 }
3122 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 3123 p = xdr_reserve_space(xdr, 8);
3124 if (!p)
1da177e4 3125 goto out_resource;
b64c7f3b 3126 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 3127 }
3128 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 3129 p = xdr_reserve_space(xdr, 8);
3130 if (!p)
1da177e4 3131 goto out_resource;
b64c7f3b 3132 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 3133 }
3134 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 3135 p = xdr_reserve_space(xdr, 8);
3136 if (!p)
1da177e4 3137 goto out_resource;
b64c7f3b 3138 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 3139 }
81c3f413 3140 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 3141 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 3142 if (status)
3143 goto out;
3144 }
1da177e4 3145 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 3146 p = xdr_reserve_space(xdr, 4);
3147 if (!p)
1da177e4 3148 goto out_resource;
c373b0a4 3149 *p++ = cpu_to_be32(1);
1da177e4
LT		 3150 }
3151 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 3152 p = xdr_reserve_space(xdr, 8);
3153 if (!p)
1da177e4 3154 goto out_resource;
b64c7f3b 3155 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 3156 }
3157 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 3158 p = xdr_reserve_space(xdr, 4);
3159 if (!p)
1da177e4 3160 goto out_resource;
c373b0a4 3161 *p++ = cpu_to_be32(255);
1da177e4
LT		 3162 }
3163 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 3164 p = xdr_reserve_space(xdr, 4);
3165 if (!p)
1da177e4 3166 goto out_resource;
c373b0a4 3167 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 3168 }
3169 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 3170 p = xdr_reserve_space(xdr, 8);
3171 if (!p)
1da177e4 3172 goto out_resource;
b64c7f3b 3173 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 3174 }
3175 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 3176 p = xdr_reserve_space(xdr, 8);
3177 if (!p)
1da177e4 3178 goto out_resource;
b64c7f3b 3179 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 3180 }
3181 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 3182 p = xdr_reserve_space(xdr, 4);
3183 if (!p)
1da177e4 3184 goto out_resource;
c373b0a4 3185 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 3186 }
3187 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 3188 p = xdr_reserve_space(xdr, 4);
3189 if (!p)
1da177e4 3190 goto out_resource;
c373b0a4 3191 *p++ = cpu_to_be32(1);
1da177e4
LT		 3192 }
3193 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 3194 p = xdr_reserve_space(xdr, 4);
3195 if (!p)
1da177e4 3196 goto out_resource;
c373b0a4 3197 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 3198 }
3199 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 3200 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 3201 if (status)
3202 goto out;
3203 }
3204 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 3205 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 3206 if (status)
3207 goto out;
3208 }
3209 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 3210 p = xdr_reserve_space(xdr, 8);
3211 if (!p)
1da177e4 3212 goto out_resource;
c373b0a4
BF		 3213 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
3214 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 3215 }
3216 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 3217 p = xdr_reserve_space(xdr, 8);
3218 if (!p)
1da177e4
LT		 3219 goto out_resource;
3220 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 3221 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3222 }
3223 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 3224 p = xdr_reserve_space(xdr, 8);
3225 if (!p)
1da177e4
LT		 3226 goto out_resource;
3227 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 3228 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3229 }
3230 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 3231 p = xdr_reserve_space(xdr, 8);
3232 if (!p)
1da177e4
LT		 3233 goto out_resource;
3234 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 3235 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3236 }
3237 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 3238 p = xdr_reserve_space(xdr, 8);
3239 if (!p)
1da177e4
LT		 3240 goto out_resource;
3241 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 3242 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3243 }
3244 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 3245 p = xdr_reserve_space(xdr, 12);
3246 if (!p)
1da177e4 3247 goto out_resource;
b64c7f3b 3248 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 3249 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 3250 }
3251 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 3252 p = xdr_reserve_space(xdr, 12);
3253 if (!p)
1da177e4 3254 goto out_resource;
16945141 3255 p = encode_time_delta(p, d_inode(dentry));
1da177e4
LT		 3256 }
3257 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 3258 p = xdr_reserve_space(xdr, 12);
3259 if (!p)
1da177e4 3260 goto out_resource;
b64c7f3b 3261 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 3262 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 3263 }
3264 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 3265 p = xdr_reserve_space(xdr, 12);
3266 if (!p)
1da177e4 3267 goto out_resource;
b64c7f3b 3268 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 3269 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 3270 }
3271 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
0a2050d7
KM		 3272 struct kstat parent_stat;
3273 u64 ino = stat.ino;
3274
ddd1ea56
BF		 3275 p = xdr_reserve_space(xdr, 8);
3276 if (!p)
1da177e4 3277 goto out_resource;
406a7ea9
FF		 3278 /*
3279 * Get parent's attributes if not ignoring crossmount
3280 * and this is the root of a cross-mounted filesystem.
3281 */
3282 if (ignore_crossmnt == 0 &&
0a2050d7
KM		 3283 dentry == exp->ex_path.mnt->mnt_root) {
3284 err = get_parent_attributes(exp, &parent_stat);
3285 if (err)
3286 goto out_nfserr;
3287 ino = parent_stat.ino;
3288 }
3289 p = xdr_encode_hyper(p, ino);
1da177e4 3290 }
9cf514cc 3291#ifdef CONFIG_NFSD_PNFS
6896f15a 3292 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
8a4c3926 3293 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 3294 if (status)
3295 goto out;
3296 }
3297
3298 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
8a4c3926 3299 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 3300 if (status)
3301 goto out;
9cf514cc
CH		 3302 }
3303
3304 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
3305 p = xdr_reserve_space(xdr, 4);
3306 if (!p)
3307 goto out_resource;
3308 *p++ = cpu_to_be32(stat.blksize);
3309 }
3310#endif /* CONFIG_NFSD_PNFS */
8c18f205 3311 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
b26b78cb
TM		 3312 u32 supp[3];
3313
3314 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
3315 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
3316 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
3317 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
3318
3319 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
75976de6
KM		 3320 if (status)
3321 goto out;
8c18f205 3322 }
7e705706 3323
0ab88ca4 3324#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
7d580722
KM		 3325 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
3326 status = nfsd4_encode_security_label(xdr, rqstp, context,
3327 contextlen);
3328 if (status)
3329 goto out;
3330 }
0ab88ca4 3331#endif
7d580722 3332
0e885e84
FL		 3333 if (bmval2 & FATTR4_WORD2_XATTR_SUPPORT) {
3334 p = xdr_reserve_space(xdr, 4);
3335 if (!p)
3336 goto out_resource;
3337 err = xattr_supported_namespace(d_inode(dentry),
3338 XATTR_USER_PREFIX);
3339 *p++ = cpu_to_be32(err == 0);
3340 }
3341
082d4bd7
BF		 3342 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
3343 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 3344 status = nfs_ok;
3345
3346out:
ba4e55bb 3347#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 3348 if (context)
3349 security_release_secctx(context, contextlen);
ba4e55bb 3350#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 3351 kfree(acl);
18df11d0 3352 if (tempfh) {
d50e6136 3353 fh_put(tempfh);
18df11d0
YZ		 3354 kfree(tempfh);
3355 }
1fcea5b2
BF		 3356 if (status)
3357 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3358 return status;
3359out_nfserr:
b8dd7b9a 3360 status = nfserrno(err);
1da177e4
LT		 3361 goto out;
3362out_resource:
1da177e4
LT		 3363 status = nfserr_resource;
3364 goto out;
1da177e4
LT		 3365}
3366
2825a7f9
BF		 3367static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
3368 struct xdr_buf *buf, __be32 *p, int bytes)
3369{
3370 xdr->scratch.iov_len = 0;
3371 memset(buf, 0, sizeof(struct xdr_buf));
3372 buf->head[0].iov_base = p;
3373 buf->head[0].iov_len = 0;
3374 buf->len = 0;
3375 xdr->buf = buf;
3376 xdr->iov = buf->head;
3377 xdr->p = p;
3378 xdr->end = (void *)p + bytes;
3379 buf->buflen = bytes;
3380}
3381
d5184658
BF		 3382__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
3383 struct svc_fh *fhp, struct svc_export *exp,
3384 struct dentry *dentry, u32 *bmval,
3385 struct svc_rqst *rqstp, int ignore_crossmnt)
3386{
2825a7f9 3387 struct xdr_buf dummy;
d5184658
BF		 3388 struct xdr_stream xdr;
3389 __be32 ret;
3390
2825a7f9 3391 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 3392 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
3393 ignore_crossmnt);
3394 *p = xdr.p;
3395 return ret;
3396}
3397
c0ce6ec8
BF		 3398static inline int attributes_need_mount(u32 *bmval)
3399{
3400 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
3401 return 1;
3402 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
3403 return 1;
3404 return 0;
3405}
3406
b37ad28b 3407static __be32
561f0ed4
BF		 3408nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
3409 const char *name, int namlen)
1da177e4
LT		 3410{
3411 struct svc_export *exp = cd->rd_fhp->fh_export;
3412 struct dentry *dentry;
b37ad28b 3413 __be32 nfserr;
406a7ea9 3414 int ignore_crossmnt = 0;
1da177e4 3415
6c2d4798 3416 dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
1da177e4
LT		 3417 if (IS_ERR(dentry))
3418 return nfserrno(PTR_ERR(dentry));
3419
3420 exp_get(exp);
406a7ea9
FF		 3421 /*
3422 * In the case of a mountpoint, the client may be asking for
3423 * attributes that are only properties of the underlying filesystem
3424 * as opposed to the cross-mounted file system. In such a case,
3425 * we will not follow the cross mount and will fill the attribtutes
3426 * directly from the mountpoint dentry.
3427 */
3227fa41 3428 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 3429 int err;
3430
3227fa41
BF		 3431 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3432 && !attributes_need_mount(cd->rd_bmval)) {
3433 ignore_crossmnt = 1;
3434 goto out_encode;
3435 }
dcb488a3
AA		 3436 /*
3437 * Why the heck aren't we just using nfsd_lookup??
3438 * Different "."/".." handling? Something else?
3439 * At least, add a comment here to explain....
3440 */
021d3a72
BF		 3441 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3442 if (err) {
3443 nfserr = nfserrno(err);
1da177e4
LT		 3444 goto out_put;
3445 }
dcb488a3
AA		 3446 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3447 if (nfserr)
3448 goto out_put;
1da177e4
LT		 3449
3450 }
3227fa41 3451out_encode:
561f0ed4 3452 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 3453 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 3454out_put:
3455 dput(dentry);
3456 exp_put(exp);
3457 return nfserr;
3458}
3459
2ebbc012 3460static __be32 *
561f0ed4 3461nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 3462{
561f0ed4
BF		 3463 __be32 *p;
3464
c3a45617 3465 p = xdr_reserve_space(xdr, 20);
561f0ed4 3466 if (!p)
1da177e4
LT		 3467 return NULL;
3468 *p++ = htonl(2);
3469 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
3470 *p++ = htonl(0); /* bmval1 */
3471
87915c64 3472 *p++ = htonl(4); /* attribute length */
1da177e4 3473 *p++ = nfserr; /* no htonl */
1da177e4
LT		 3474 return p;
3475}
3476
3477static int
a0ad13ef
N		 3478nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3479 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 3480{
a0ad13ef 3481 struct readdir_cd *ccd = ccdv;
1da177e4 3482 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 3483 struct xdr_stream *xdr = cd->xdr;
3484 int start_offset = xdr->buf->len;
3485 int cookie_offset;
aee37764 3486 u32 name_and_cookie;
561f0ed4 3487 int entry_bytes;
b37ad28b 3488 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 3489 __be64 wire_offset;
3490 __be32 *p;
1da177e4
LT		 3491
3492 /* In nfsv4, "." and ".." never make it onto the wire.. */
3493 if (name && isdotent(name, namlen)) {
3494 cd->common.err = nfs_ok;
3495 return 0;
3496 }
3497
561f0ed4
BF		 3498 if (cd->cookie_offset) {
3499 wire_offset = cpu_to_be64(offset);
3500 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3501 &wire_offset, 8);
3502 }
1da177e4 3503
561f0ed4
BF		 3504 p = xdr_reserve_space(xdr, 4);
3505 if (!p)
1da177e4 3506 goto fail;
1da177e4 3507 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 3508 cookie_offset = xdr->buf->len;
3509 p = xdr_reserve_space(xdr, 3*4 + namlen);
3510 if (!p)
3511 goto fail;
1da177e4
LT		 3512 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
3513 p = xdr_encode_array(p, name, namlen); /* name length & name */
3514
561f0ed4 3515 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 3516 switch (nfserr) {
3517 case nfs_ok:
1da177e4
LT		 3518 break;
3519 case nfserr_resource:
3520 nfserr = nfserr_toosmall;
3521 goto fail;
b2c0cea6 3522 case nfserr_noent:
f41c5ad2 3523 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 3524 goto skip_entry;
1da177e4
LT		 3525 default:
3526 /*
3527 * If the client requested the RDATTR_ERROR attribute,
3528 * we stuff the error code into this attribute
3529 * and continue. If this attribute was not requested,
3530 * then in accordance with the spec, we fail the
3531 * entire READDIR operation(!)
3532 */
3533 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3534 goto fail;
561f0ed4 3535 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 3536 if (p == NULL) {
3537 nfserr = nfserr_toosmall;
1da177e4 3538 goto fail;
34081efc 3539 }
1da177e4 3540 }
561f0ed4
BF		 3541 nfserr = nfserr_toosmall;
3542 entry_bytes = xdr->buf->len - start_offset;
3543 if (entry_bytes > cd->rd_maxcount)
3544 goto fail;
3545 cd->rd_maxcount -= entry_bytes;
aee37764
BF		 3546 /*
3547 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3548 * let's always let through the first entry, at least:
3549 */
0ec016e3
BF		 3550 if (!cd->rd_dircount)
3551 goto fail;
3552 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
aee37764
BF		 3553 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3554 goto fail;
3555 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
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;
3670 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
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);
4807 p = xdr_encode_hyper(p, read->rd_offset);
278765ea 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
5414int
026fec7e 5415nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
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
CL		 5421
5422 args->xdr = &rqstp->rq_arg_stream;
1da177e4
LT		 5423 args->ops = args->iops;
5424 args->rqstp = rqstp;
5425
d9b74bda 5426 return nfsd4_decode_compound(args);
1da177e4
LT		 5427}
5428
5429int
63f8de37 5430nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
1da177e4 5431{
63f8de37 5432 struct nfsd4_compoundres *resp = rqstp->rq_resp;
bddfdbcd 5433 struct xdr_buf *buf = resp->xdr->buf;
6ac90391
BF		 5434
5435 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
5436 buf->tail[0].iov_len);
dd97fdde 5437
cc028a10
CL		 5438 *p = resp->cstate.status;
5439
bddfdbcd 5440 rqstp->rq_next_page = resp->xdr->page_ptr + 1;
2825a7f9 5441
1da177e4
LT		 5442 p = resp->tagp;
5443 *p++ = htonl(resp->taglen);
5444 memcpy(p, resp->tag, resp->taglen);
5445 p += XDR_QUADLEN(resp->taglen);
5446 *p++ = htonl(resp->opcnt);
5447
b607664e 5448 nfsd4_sequence_done(resp);
1da177e4
LT		 5449 return 1;
5450}
Michael's Linux tree.