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NFSD: Replace READ* macros in nfsd4_decode_test_stateid()
[people/ms/linux.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1da177e4
LT		 34 */
35
96bcad50 36#include <linux/file.h>
5a0e3ad6 37#include <linux/slab.h>
1da177e4 38#include <linux/namei.h>
341eb184 39#include <linux/statfs.h>
0733d213 40#include <linux/utsname.h>
17456804 41#include <linux/pagemap.h>
4796f457 42#include <linux/sunrpc/svcauth_gss.h>
84e1b21d 43#include <linux/sunrpc/addr.h>
23e50fe3
FL		 44#include <linux/xattr.h>
45#include <uapi/linux/xattr.h>
9a74af21 46
2ca72e17
BF		 47#include "idmap.h"
48#include "acl.h"
9a74af21 49#include "xdr4.h"
0a3adade 50#include "vfs.h"
17456804 51#include "state.h"
1091006c 52#include "cache.h"
3d733711 53#include "netns.h"
9cf514cc 54#include "pnfs.h"
5c4583b2 55#include "filecache.h"
2ca72e17 56
08281341
CL		 57#include "trace.h"
58
18032ca0
DQ		 59#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
60#include <linux/security.h>
61#endif
62
63
1da177e4
LT		 64#define NFSDDBG_FACILITY NFSDDBG_XDR
65
5cf23dbb 66const u32 nfsd_suppattrs[3][3] = {
916d2d84
BF		 67 {NFSD4_SUPPORTED_ATTRS_WORD0,
68 NFSD4_SUPPORTED_ATTRS_WORD1,
69 NFSD4_SUPPORTED_ATTRS_WORD2},
70
71 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
72 NFSD4_1_SUPPORTED_ATTRS_WORD1,
73 NFSD4_1_SUPPORTED_ATTRS_WORD2},
74
75 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
76 NFSD4_1_SUPPORTED_ATTRS_WORD1,
77 NFSD4_2_SUPPORTED_ATTRS_WORD2},
78};
79
42ca0993
BF		 80/*
81 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
82 * directory in order to indicate to the client that a filesystem boundary is present
83 * We use a fixed fsid for a referral
84 */
85#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
86#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
87
b37ad28b 88static __be32
a36b1725 89check_filename(char *str, int len)
1da177e4
LT		 90{
91 int i;
92
93 if (len == 0)
94 return nfserr_inval;
000dfa18
CL		 95 if (len > NFS4_MAXNAMLEN)
96 return nfserr_nametoolong;
1da177e4 97 if (isdotent(str, len))
a36b1725 98 return nfserr_badname;
1da177e4
LT		 99 for (i = 0; i < len; i++)
100 if (str[i] == '/')
a36b1725 101 return nfserr_badname;
1da177e4
LT		 102 return 0;
103}
104
1da177e4 105#define DECODE_HEAD \
2ebbc012 106 __be32 *p; \
b37ad28b 107 __be32 status
1da177e4
LT		 108#define DECODE_TAIL \
109 status = 0; \
110out: \
111 return status; \
112xdr_error: \
817cb9d4
CL		 113 dprintk("NFSD: xdr error (%s:%d)\n", \
114 __FILE__, __LINE__); \
1da177e4
LT		 115 status = nfserr_bad_xdr; \
116 goto out
117
1da177e4
LT		 118#define READMEM(x,nbytes) do { \
119 x = (char *)p; \
120 p += XDR_QUADLEN(nbytes); \
121} while (0)
122#define SAVEMEM(x,nbytes) do { \
123 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
124 savemem(argp, p, nbytes) : \
125 (char *)p)) { \
817cb9d4
CL		 126 dprintk("NFSD: xdr error (%s:%d)\n", \
127 __FILE__, __LINE__); \
1da177e4
LT		 128 goto xdr_error; \
129 } \
130 p += XDR_QUADLEN(nbytes); \
131} while (0)
132#define COPYMEM(x,nbytes) do { \
133 memcpy((x), p, nbytes); \
134 p += XDR_QUADLEN(nbytes); \
135} while (0)
c1346a12
CL		 136#define READ_BUF(nbytes) \
137 do { \
138 p = xdr_inline_decode(argp->xdr,\
139 nbytes); \
140 if (!p) \
141 goto xdr_error; \
142 } while (0)
2b86e3aa 143
60adfc50
AA		 144static int zero_clientid(clientid_t *clid)
145{
146 return (clid->cl_boot == 0) && (clid->cl_id == 0);
147}
148
2d8498db 149/**
d5e23383 150 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
ce043ac8 151 * @argp: NFSv4 compound argument structure
ed992753 152 * @len: length of buffer to allocate
2d8498db 153 *
ed992753
TM		 154 * Allocates a buffer of size @len to be freed when processing the compound
155 * operation described in @argp finishes.
2d8498db 156 */
d5e23383
BF		 157static void *
158svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
1da177e4 159{
d5e23383 160 struct svcxdr_tmpbuf *tb;
1da177e4 161
d5e23383 162 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
1da177e4 163 if (!tb)
d5e23383 164 return NULL;
1da177e4
LT		 165 tb->next = argp->to_free;
166 argp->to_free = tb;
d5e23383 167 return tb->buf;
1da177e4
LT		 168}
169
29c353b3
BF		 170/*
171 * For xdr strings that need to be passed to other kernel api's
172 * as null-terminated strings.
173 *
174 * Note null-terminating in place usually isn't safe since the
175 * buffer might end on a page boundary.
176 */
177static char *
178svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
179{
d5e23383 180 char *p = svcxdr_tmpalloc(argp, len + 1);
29c353b3
BF		 181
182 if (!p)
183 return NULL;
184 memcpy(p, buf, len);
185 p[len] = '\0';
29c353b3 186 return p;
1da177e4
LT		 187}
188
2d8498db
CH		 189/**
190 * savemem - duplicate a chunk of memory for later processing
191 * @argp: NFSv4 compound argument structure to be freed with
192 * @p: pointer to be duplicated
193 * @nbytes: length to be duplicated
194 *
195 * Returns a pointer to a copy of @nbytes bytes of memory at @p
196 * that are preserved until processing of the NFSv4 compound
197 * operation described by @argp finishes.
198 */
2ebbc012 199static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 200{
d5e23383
BF		 201 void *ret;
202
203 ret = svcxdr_tmpalloc(argp, nbytes);
204 if (!ret)
1da177e4 205 return NULL;
d5e23383
BF		 206 memcpy(ret, p, nbytes);
207 return ret;
1da177e4
LT		 208}
209
5dcbfabb
CL		 210
211/*
212 * NFSv4 basic data type decoders
213 */
214
1a994408
CL		 215/*
216 * This helper handles variable-length opaques which belong to protocol
217 * elements that this implementation does not support.
218 */
219static __be32
220nfsd4_decode_ignored_string(struct nfsd4_compoundargs *argp, u32 maxlen)
221{
222 u32 len;
223
224 if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
225 return nfserr_bad_xdr;
226 if (maxlen && len > maxlen)
227 return nfserr_bad_xdr;
228 if (!xdr_inline_decode(argp->xdr, len))
229 return nfserr_bad_xdr;
230
231 return nfs_ok;
232}
233
5dcbfabb
CL		 234static __be32
235nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
236{
237 __be32 *p;
238 u32 len;
239
240 if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
241 return nfserr_bad_xdr;
242 if (len == 0 || len > NFS4_OPAQUE_LIMIT)
243 return nfserr_bad_xdr;
244 p = xdr_inline_decode(argp->xdr, len);
245 if (!p)
246 return nfserr_bad_xdr;
247 o->data = svcxdr_tmpalloc(argp, len);
248 if (!o->data)
249 return nfserr_jukebox;
250 o->len = len;
251 memcpy(o->data, p, len);
252
253 return nfs_ok;
254}
255
000dfa18
CL		 256static __be32
257nfsd4_decode_component4(struct nfsd4_compoundargs *argp, char **namp, u32 *lenp)
258{
259 __be32 *p, status;
260
261 if (xdr_stream_decode_u32(argp->xdr, lenp) < 0)
262 return nfserr_bad_xdr;
263 p = xdr_inline_decode(argp->xdr, *lenp);
264 if (!p)
265 return nfserr_bad_xdr;
266 status = check_filename((char *)p, *lenp);
267 if (status)
268 return status;
269 *namp = svcxdr_tmpalloc(argp, *lenp);
270 if (!*namp)
271 return nfserr_jukebox;
272 memcpy(*namp, p, *lenp);
273
274 return nfs_ok;
275}
276
1c3eff7e
CL		 277static __be32
278nfsd4_decode_nfstime4(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
279{
280 __be32 *p;
281
282 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 3);
283 if (!p)
284 return nfserr_bad_xdr;
285 p = xdr_decode_hyper(p, &tv->tv_sec);
286 tv->tv_nsec = be32_to_cpup(p++);
287 if (tv->tv_nsec >= (u32)1000000000)
288 return nfserr_inval;
289 return nfs_ok;
290}
291
796dd1c6
CL		 292static __be32
293nfsd4_decode_verifier4(struct nfsd4_compoundargs *argp, nfs4_verifier *verf)
294{
295 __be32 *p;
296
297 p = xdr_inline_decode(argp->xdr, NFS4_VERIFIER_SIZE);
298 if (!p)
299 return nfserr_bad_xdr;
300 memcpy(verf->data, p, sizeof(verf->data));
301 return nfs_ok;
302}
303
d1c263a0
CL		 304/**
305 * nfsd4_decode_bitmap4 - Decode an NFSv4 bitmap4
306 * @argp: NFSv4 compound argument structure
307 * @bmval: pointer to an array of u32's to decode into
308 * @bmlen: size of the @bmval array
309 *
310 * The server needs to return nfs_ok rather than nfserr_bad_xdr when
311 * encountering bitmaps containing bits it does not recognize. This
312 * includes bits in bitmap words past WORDn, where WORDn is the last
313 * bitmap WORD the implementation currently supports. Thus we are
314 * careful here to simply ignore bits in bitmap words that this
315 * implementation has yet to support explicitly.
316 *
317 * Return values:
318 * %nfs_ok: @bmval populated successfully
319 * %nfserr_bad_xdr: the encoded bitmap was invalid
320 */
321static __be32
322nfsd4_decode_bitmap4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen)
323{
324 u32 i, count;
325 __be32 *p;
326
327 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
328 return nfserr_bad_xdr;
329 /* request sanity */
330 if (count > 1000)
331 return nfserr_bad_xdr;
332 p = xdr_inline_decode(argp->xdr, count << 2);
333 if (!p)
334 return nfserr_bad_xdr;
335 i = 0;
336 while (i < count)
337 bmval[i++] = be32_to_cpup(p++);
338 while (i < bmlen)
339 bmval[i++] = 0;
340
341 return nfs_ok;
342}
343
c941a968
CL		 344static __be32
345nfsd4_decode_nfsace4(struct nfsd4_compoundargs *argp, struct nfs4_ace *ace)
346{
347 __be32 *p, status;
348 u32 length;
349
350 if (xdr_stream_decode_u32(argp->xdr, &ace->type) < 0)
351 return nfserr_bad_xdr;
352 if (xdr_stream_decode_u32(argp->xdr, &ace->flag) < 0)
353 return nfserr_bad_xdr;
354 if (xdr_stream_decode_u32(argp->xdr, &ace->access_mask) < 0)
355 return nfserr_bad_xdr;
356
357 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
358 return nfserr_bad_xdr;
359 p = xdr_inline_decode(argp->xdr, length);
360 if (!p)
361 return nfserr_bad_xdr;
362 ace->whotype = nfs4_acl_get_whotype((char *)p, length);
363 if (ace->whotype != NFS4_ACL_WHO_NAMED)
364 status = nfs_ok;
365 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
366 status = nfsd_map_name_to_gid(argp->rqstp,
367 (char *)p, length, &ace->who_gid);
368 else
369 status = nfsd_map_name_to_uid(argp->rqstp,
370 (char *)p, length, &ace->who_uid);
371
372 return status;
373}
374
375/* A counted array of nfsace4's */
376static noinline __be32
377nfsd4_decode_acl(struct nfsd4_compoundargs *argp, struct nfs4_acl **acl)
378{
379 struct nfs4_ace *ace;
380 __be32 status;
381 u32 count;
382
383 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
384 return nfserr_bad_xdr;
385
386 if (count > xdr_stream_remaining(argp->xdr) / 20)
387 /*
388 * Even with 4-byte names there wouldn't be
389 * space for that many aces; something fishy is
390 * going on:
391 */
392 return nfserr_fbig;
393
394 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(count));
395 if (*acl == NULL)
396 return nfserr_jukebox;
397
398 (*acl)->naces = count;
399 for (ace = (*acl)->aces; ace < (*acl)->aces + count; ace++) {
400 status = nfsd4_decode_nfsace4(argp, ace);
401 if (status)
402 return status;
403 }
404
405 return nfs_ok;
406}
407
dabe9182
CL		 408static noinline __be32
409nfsd4_decode_security_label(struct nfsd4_compoundargs *argp,
410 struct xdr_netobj *label)
411{
412 u32 lfs, pi, length;
413 __be32 *p;
414
415 if (xdr_stream_decode_u32(argp->xdr, &lfs) < 0)
416 return nfserr_bad_xdr;
417 if (xdr_stream_decode_u32(argp->xdr, &pi) < 0)
418 return nfserr_bad_xdr;
419
420 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
421 return nfserr_bad_xdr;
422 if (length > NFS4_MAXLABELLEN)
423 return nfserr_badlabel;
424 p = xdr_inline_decode(argp->xdr, length);
425 if (!p)
426 return nfserr_bad_xdr;
427 label->len = length;
428 label->data = svcxdr_dupstr(argp, p, length);
429 if (!label->data)
430 return nfserr_jukebox;
431
432 return nfs_ok;
433}
434
b37ad28b 435static __be32
d1c263a0
CL		 436nfsd4_decode_fattr4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen,
437 struct iattr *iattr, struct nfs4_acl **acl,
438 struct xdr_netobj *label, int *umask)
1da177e4 439{
081d53fe
CL		 440 unsigned int starting_pos;
441 u32 attrlist4_count;
d1c263a0 442 __be32 *p, status;
1da177e4 443
1da177e4 444 iattr->ia_valid = 0;
d1c263a0
CL		 445 status = nfsd4_decode_bitmap4(argp, bmval, bmlen);
446 if (status)
447 return nfserr_bad_xdr;
1da177e4 448
e864c189
BF		 449 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
450 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
451 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
452 if (nfsd_attrs_supported(argp->minorversion, bmval))
453 return nfserr_inval;
454 return nfserr_attrnotsupp;
455 }
456
081d53fe
CL		 457 if (xdr_stream_decode_u32(argp->xdr, &attrlist4_count) < 0)
458 return nfserr_bad_xdr;
459 starting_pos = xdr_stream_pos(argp->xdr);
1da177e4
LT		 460
461 if (bmval[0] & FATTR4_WORD0_SIZE) {
2ac1b9b2
CL		 462 u64 size;
463
464 if (xdr_stream_decode_u64(argp->xdr, &size) < 0)
465 return nfserr_bad_xdr;
466 iattr->ia_size = size;
1da177e4
LT		 467 iattr->ia_valid |= ATTR_SIZE;
468 }
469 if (bmval[0] & FATTR4_WORD0_ACL) {
c941a968
CL		 470 status = nfsd4_decode_acl(argp, acl);
471 if (status)
472 return status;
1da177e4
LT		 473 } else
474 *acl = NULL;
475 if (bmval[1] & FATTR4_WORD1_MODE) {
1c8f0ad7
CL		 476 u32 mode;
477
478 if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
479 return nfserr_bad_xdr;
480 iattr->ia_mode = mode;
1da177e4
LT		 481 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
482 iattr->ia_valid |= ATTR_MODE;
483 }
484 if (bmval[1] & FATTR4_WORD1_OWNER) {
9853a5ac
CL		 485 u32 length;
486
487 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
488 return nfserr_bad_xdr;
489 p = xdr_inline_decode(argp->xdr, length);
490 if (!p)
491 return nfserr_bad_xdr;
492 status = nfsd_map_name_to_uid(argp->rqstp, (char *)p, length,
493 &iattr->ia_uid);
494 if (status)
47c85291 495 return status;
1da177e4
LT		 496 iattr->ia_valid |= ATTR_UID;
497 }
498 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
393c31dd
CL		 499 u32 length;
500
501 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
502 return nfserr_bad_xdr;
503 p = xdr_inline_decode(argp->xdr, length);
504 if (!p)
505 return nfserr_bad_xdr;
506 status = nfsd_map_name_to_gid(argp->rqstp, (char *)p, length,
507 &iattr->ia_gid);
508 if (status)
47c85291 509 return status;
1da177e4
LT		 510 iattr->ia_valid |= ATTR_GID;
511 }
512 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1c3eff7e
CL		 513 u32 set_it;
514
515 if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
516 return nfserr_bad_xdr;
517 switch (set_it) {
1da177e4 518 case NFS4_SET_TO_CLIENT_TIME:
1c3eff7e 519 status = nfsd4_decode_nfstime4(argp, &iattr->ia_atime);
4c94e13e
CH		 520 if (status)
521 return status;
1da177e4
LT		 522 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
523 break;
524 case NFS4_SET_TO_SERVER_TIME:
525 iattr->ia_valid |= ATTR_ATIME;
526 break;
527 default:
1c3eff7e 528 return nfserr_bad_xdr;
1da177e4
LT		 529 }
530 }
1da177e4 531 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1c3eff7e
CL		 532 u32 set_it;
533
534 if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
535 return nfserr_bad_xdr;
536 switch (set_it) {
1da177e4 537 case NFS4_SET_TO_CLIENT_TIME:
1c3eff7e 538 status = nfsd4_decode_nfstime4(argp, &iattr->ia_mtime);
4c94e13e
CH		 539 if (status)
540 return status;
1da177e4
LT		 541 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
542 break;
543 case NFS4_SET_TO_SERVER_TIME:
544 iattr->ia_valid |= ATTR_MTIME;
545 break;
546 default:
1c3eff7e 547 return nfserr_bad_xdr;
1da177e4
LT		 548 }
549 }
18032ca0 550 label->len = 0;
2285ae76
AB		 551 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
552 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
dabe9182
CL		 553 status = nfsd4_decode_security_label(argp, label);
554 if (status)
555 return status;
18032ca0 556 }
47057abd 557 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
66f0476c
CL		 558 u32 mode, mask;
559
47057abd 560 if (!umask)
66f0476c
CL		 561 return nfserr_bad_xdr;
562 if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
563 return nfserr_bad_xdr;
564 iattr->ia_mode = mode & (S_IFMT | S_IALLUGO);
565 if (xdr_stream_decode_u32(argp->xdr, &mask) < 0)
566 return nfserr_bad_xdr;
567 *umask = mask & S_IRWXUGO;
47057abd
AG		 568 iattr->ia_valid |= ATTR_MODE;
569 }
081d53fe
CL		 570
571 /* request sanity: did attrlist4 contain the expected number of words? */
572 if (attrlist4_count != xdr_stream_pos(argp->xdr) - starting_pos)
573 return nfserr_bad_xdr;
1da177e4 574
d1c263a0 575 return nfs_ok;
1da177e4
LT		 576}
577
e31a1b66
BH		 578static __be32
579nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
580{
581 DECODE_HEAD;
582
583 READ_BUF(sizeof(stateid_t));
06553991 584 sid->si_generation = be32_to_cpup(p++);
e31a1b66
BH		 585 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
586
587 DECODE_TAIL;
588}
589
d3d2f381
CL		 590static __be32
591nfsd4_decode_stateid4(struct nfsd4_compoundargs *argp, stateid_t *sid)
592{
593 __be32 *p;
594
595 p = xdr_inline_decode(argp->xdr, NFS4_STATEID_SIZE);
596 if (!p)
597 return nfserr_bad_xdr;
598 sid->si_generation = be32_to_cpup(p++);
599 memcpy(&sid->si_opaque, p, sizeof(sid->si_opaque));
600 return nfs_ok;
601}
602
144e8269
CL		 603static __be32
604nfsd4_decode_clientid4(struct nfsd4_compoundargs *argp, clientid_t *clientid)
605{
606 __be32 *p;
607
608 p = xdr_inline_decode(argp->xdr, sizeof(__be64));
609 if (!p)
610 return nfserr_bad_xdr;
611 memcpy(clientid, p, sizeof(*clientid));
612 return nfs_ok;
613}
614
615static __be32
616nfsd4_decode_state_owner4(struct nfsd4_compoundargs *argp,
617 clientid_t *clientid, struct xdr_netobj *owner)
618{
619 __be32 status;
620
621 status = nfsd4_decode_clientid4(argp, clientid);
622 if (status)
623 return status;
624 return nfsd4_decode_opaque(argp, owner);
625}
626
04495971
CL		 627#ifdef CONFIG_NFSD_PNFS
628static __be32
629nfsd4_decode_deviceid4(struct nfsd4_compoundargs *argp,
630 struct nfsd4_deviceid *devid)
631{
632 __be32 *p;
633
634 p = xdr_inline_decode(argp->xdr, NFS4_DEVICEID4_SIZE);
635 if (!p)
636 return nfserr_bad_xdr;
637 memcpy(devid, p, sizeof(*devid));
638 return nfs_ok;
639}
5185980d
CL		 640
641static __be32
642nfsd4_decode_layoutupdate4(struct nfsd4_compoundargs *argp,
643 struct nfsd4_layoutcommit *lcp)
644{
645 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_layout_type) < 0)
646 return nfserr_bad_xdr;
647 if (lcp->lc_layout_type < LAYOUT_NFSV4_1_FILES)
648 return nfserr_bad_xdr;
649 if (lcp->lc_layout_type >= LAYOUT_TYPE_MAX)
650 return nfserr_bad_xdr;
651
652 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_up_len) < 0)
653 return nfserr_bad_xdr;
654 if (lcp->lc_up_len > 0) {
655 lcp->lc_up_layout = xdr_inline_decode(argp->xdr, lcp->lc_up_len);
656 if (!lcp->lc_up_layout)
657 return nfserr_bad_xdr;
658 }
659
660 return nfs_ok;
661}
662
645fcad3
CL		 663static __be32
664nfsd4_decode_layoutreturn4(struct nfsd4_compoundargs *argp,
665 struct nfsd4_layoutreturn *lrp)
666{
667 __be32 status;
668
669 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_return_type) < 0)
670 return nfserr_bad_xdr;
671 switch (lrp->lr_return_type) {
672 case RETURN_FILE:
673 if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.offset) < 0)
674 return nfserr_bad_xdr;
675 if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.length) < 0)
676 return nfserr_bad_xdr;
677 status = nfsd4_decode_stateid4(argp, &lrp->lr_sid);
678 if (status)
679 return status;
680 if (xdr_stream_decode_u32(argp->xdr, &lrp->lrf_body_len) < 0)
681 return nfserr_bad_xdr;
682 if (lrp->lrf_body_len > 0) {
683 lrp->lrf_body = xdr_inline_decode(argp->xdr, lrp->lrf_body_len);
684 if (!lrp->lrf_body)
685 return nfserr_bad_xdr;
686 }
687 break;
688 case RETURN_FSID:
689 case RETURN_ALL:
690 lrp->lr_seg.offset = 0;
691 lrp->lr_seg.length = NFS4_MAX_UINT64;
692 break;
693 default:
694 return nfserr_bad_xdr;
695 }
696
697 return nfs_ok;
698}
699
04495971
CL		 700#endif /* CONFIG_NFSD_PNFS */
701
571e0451
CL		 702static __be32
703nfsd4_decode_sessionid4(struct nfsd4_compoundargs *argp,
704 struct nfs4_sessionid *sessionid)
705{
706 __be32 *p;
707
708 p = xdr_inline_decode(argp->xdr, NFS4_MAX_SESSIONID_LEN);
709 if (!p)
710 return nfserr_bad_xdr;
711 memcpy(sessionid->data, p, sizeof(sessionid->data));
712 return nfs_ok;
713}
714
1a994408
CL		 715/* Defined in Appendix A of RFC 5531 */
716static __be32
717nfsd4_decode_authsys_parms(struct nfsd4_compoundargs *argp,
718 struct nfsd4_cb_sec *cbs)
acb2887e 719{
1a994408
CL		 720 u32 stamp, gidcount, uid, gid;
721 __be32 *p, status;
722
723 if (xdr_stream_decode_u32(argp->xdr, &stamp) < 0)
724 return nfserr_bad_xdr;
725 /* machine name */
726 status = nfsd4_decode_ignored_string(argp, 255);
727 if (status)
728 return status;
729 if (xdr_stream_decode_u32(argp->xdr, &uid) < 0)
730 return nfserr_bad_xdr;
731 if (xdr_stream_decode_u32(argp->xdr, &gid) < 0)
732 return nfserr_bad_xdr;
733 if (xdr_stream_decode_u32(argp->xdr, &gidcount) < 0)
734 return nfserr_bad_xdr;
735 if (gidcount > 16)
736 return nfserr_bad_xdr;
737 p = xdr_inline_decode(argp->xdr, gidcount << 2);
738 if (!p)
739 return nfserr_bad_xdr;
740 if (cbs->flavor == (u32)(-1)) {
741 struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
742
743 kuid_t kuid = make_kuid(userns, uid);
744 kgid_t kgid = make_kgid(userns, gid);
745 if (uid_valid(kuid) && gid_valid(kgid)) {
746 cbs->uid = kuid;
747 cbs->gid = kgid;
748 cbs->flavor = RPC_AUTH_UNIX;
749 } else {
750 dprintk("RPC_AUTH_UNIX with invalid uid or gid, ignoring!\n");
751 }
752 }
753
754 return nfs_ok;
755}
756
757static __be32
758nfsd4_decode_gss_cb_handles4(struct nfsd4_compoundargs *argp,
759 struct nfsd4_cb_sec *cbs)
760{
761 __be32 status;
762 u32 service;
763
764 dprintk("RPC_AUTH_GSS callback secflavor not supported!\n");
765
766 if (xdr_stream_decode_u32(argp->xdr, &service) < 0)
767 return nfserr_bad_xdr;
768 if (service < RPC_GSS_SVC_NONE || service > RPC_GSS_SVC_PRIVACY)
769 return nfserr_bad_xdr;
770 /* gcbp_handle_from_server */
771 status = nfsd4_decode_ignored_string(argp, 0);
772 if (status)
773 return status;
774 /* gcbp_handle_from_client */
775 status = nfsd4_decode_ignored_string(argp, 0);
776 if (status)
777 return status;
778
779 return nfs_ok;
780}
781
782/* a counted array of callback_sec_parms4 items */
783static __be32
784nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
785{
786 u32 i, secflavor, nr_secflavs;
787 __be32 status;
acb2887e
BF		 788
789 /* callback_sec_params4 */
1a994408
CL		 790 if (xdr_stream_decode_u32(argp->xdr, &nr_secflavs) < 0)
791 return nfserr_bad_xdr;
57569a70
BF		 792 if (nr_secflavs)
793 cbs->flavor = (u32)(-1);
794 else
795 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
796 cbs->flavor = 0;
1a994408 797
acb2887e 798 for (i = 0; i < nr_secflavs; ++i) {
1a994408
CL		 799 if (xdr_stream_decode_u32(argp->xdr, &secflavor) < 0)
800 return nfserr_bad_xdr;
801 switch (secflavor) {
acb2887e 802 case RPC_AUTH_NULL:
1a994408 803 /* void */
12fc3e92
BF		 804 if (cbs->flavor == (u32)(-1))
805 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 806 break;
807 case RPC_AUTH_UNIX:
1a994408
CL		 808 status = nfsd4_decode_authsys_parms(argp, cbs);
809 if (status)
810 return status;
acb2887e
BF		 811 break;
812 case RPC_AUTH_GSS:
1a994408
CL		 813 status = nfsd4_decode_gss_cb_handles4(argp, cbs);
814 if (status)
815 return status;
acb2887e
BF		 816 break;
817 default:
acb2887e
BF		 818 return nfserr_inval;
819 }
820 }
1a994408
CL		 821
822 return nfs_ok;
acb2887e
BF		 823}
824
1a994408 825
d169a6a9
CL		 826/*
827 * NFSv4 operation argument decoders
828 */
829
830static __be32
831nfsd4_decode_access(struct nfsd4_compoundargs *argp,
832 struct nfsd4_access *access)
833{
834 if (xdr_stream_decode_u32(argp->xdr, &access->ac_req_access) < 0)
835 return nfserr_bad_xdr;
836 return nfs_ok;
837}
838
b37ad28b 839static __be32
1da177e4
LT		 840nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
841{
d3d2f381
CL		 842 if (xdr_stream_decode_u32(argp->xdr, &close->cl_seqid) < 0)
843 return nfserr_bad_xdr;
844 return nfsd4_decode_stateid4(argp, &close->cl_stateid);
1da177e4
LT		 845}
846
847
b37ad28b 848static __be32
1da177e4
LT		 849nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
850{
cbd9abb3
CL		 851 if (xdr_stream_decode_u64(argp->xdr, &commit->co_offset) < 0)
852 return nfserr_bad_xdr;
853 if (xdr_stream_decode_u32(argp->xdr, &commit->co_count) < 0)
854 return nfserr_bad_xdr;
855 return nfs_ok;
1da177e4
LT		 856}
857
b37ad28b 858static __be32
1da177e4
LT		 859nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
860{
000dfa18 861 __be32 *p, status;
1da177e4 862
000dfa18
CL		 863 if (xdr_stream_decode_u32(argp->xdr, &create->cr_type) < 0)
864 return nfserr_bad_xdr;
1da177e4
LT		 865 switch (create->cr_type) {
866 case NF4LNK:
000dfa18
CL		 867 if (xdr_stream_decode_u32(argp->xdr, &create->cr_datalen) < 0)
868 return nfserr_bad_xdr;
869 p = xdr_inline_decode(argp->xdr, create->cr_datalen);
870 if (!p)
871 return nfserr_bad_xdr;
29c353b3 872 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
7fb84306 873 if (!create->cr_data)
76f47128 874 return nfserr_jukebox;
1da177e4
LT		 875 break;
876 case NF4BLK:
877 case NF4CHR:
000dfa18
CL		 878 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata1) < 0)
879 return nfserr_bad_xdr;
880 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata2) < 0)
881 return nfserr_bad_xdr;
1da177e4
LT		 882 break;
883 case NF4SOCK:
884 case NF4FIFO:
885 case NF4DIR:
886 default:
887 break;
888 }
000dfa18
CL		 889 status = nfsd4_decode_component4(argp, &create->cr_name,
890 &create->cr_namelen);
891 if (status)
1da177e4 892 return status;
d1c263a0
CL		 893 status = nfsd4_decode_fattr4(argp, create->cr_bmval,
894 ARRAY_SIZE(create->cr_bmval),
895 &create->cr_iattr, &create->cr_acl,
896 &create->cr_label, &create->cr_umask);
c0d6fc8a 897 if (status)
000dfa18 898 return status;
1da177e4 899
000dfa18 900 return nfs_ok;
1da177e4
LT		 901}
902
b37ad28b 903static inline __be32
1da177e4
LT		 904nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
905{
95e6482c 906 return nfsd4_decode_stateid4(argp, &dr->dr_stateid);
1da177e4
LT		 907}
908
b37ad28b 909static inline __be32
1da177e4
LT		 910nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
911{
f759eff2
CL		 912 return nfsd4_decode_bitmap4(argp, getattr->ga_bmval,
913 ARRAY_SIZE(getattr->ga_bmval));
1da177e4
LT		 914}
915
b37ad28b 916static __be32
1da177e4
LT		 917nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
918{
5c505d12 919 return nfsd4_decode_component4(argp, &link->li_name, &link->li_namelen);
1da177e4
LT		 920}
921
8918cc0d
CL		 922static __be32
923nfsd4_decode_open_to_lock_owner4(struct nfsd4_compoundargs *argp,
924 struct nfsd4_lock *lock)
925{
926 __be32 status;
927
928 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_open_seqid) < 0)
929 return nfserr_bad_xdr;
930 status = nfsd4_decode_stateid4(argp, &lock->lk_new_open_stateid);
931 if (status)
932 return status;
933 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_lock_seqid) < 0)
934 return nfserr_bad_xdr;
935 return nfsd4_decode_state_owner4(argp, &lock->lk_new_clientid,
936 &lock->lk_new_owner);
937}
938
939static __be32
940nfsd4_decode_exist_lock_owner4(struct nfsd4_compoundargs *argp,
941 struct nfsd4_lock *lock)
942{
943 __be32 status;
944
945 status = nfsd4_decode_stateid4(argp, &lock->lk_old_lock_stateid);
946 if (status)
947 return status;
948 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_old_lock_seqid) < 0)
949 return nfserr_bad_xdr;
950
951 return nfs_ok;
952}
953
954static __be32
955nfsd4_decode_locker4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
956{
957 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_is_new) < 0)
958 return nfserr_bad_xdr;
959 if (lock->lk_is_new)
960 return nfsd4_decode_open_to_lock_owner4(argp, lock);
961 return nfsd4_decode_exist_lock_owner4(argp, lock);
962}
963
b37ad28b 964static __be32
1da177e4
LT		 965nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
966{
7c59deed
CL		 967 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_type) < 0)
968 return nfserr_bad_xdr;
1da177e4 969 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
7c59deed
CL		 970 return nfserr_bad_xdr;
971 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_reclaim) < 0)
972 return nfserr_bad_xdr;
973 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_offset) < 0)
974 return nfserr_bad_xdr;
975 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_length) < 0)
976 return nfserr_bad_xdr;
977 return nfsd4_decode_locker4(argp, lock);
1da177e4
LT		 978}
979
b37ad28b 980static __be32
1da177e4
LT		 981nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
982{
0a146f04
CL		 983 if (xdr_stream_decode_u32(argp->xdr, &lockt->lt_type) < 0)
984 return nfserr_bad_xdr;
985 if ((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
986 return nfserr_bad_xdr;
987 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_offset) < 0)
988 return nfserr_bad_xdr;
989 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_length) < 0)
990 return nfserr_bad_xdr;
991 return nfsd4_decode_state_owner4(argp, &lockt->lt_clientid,
992 &lockt->lt_owner);
1da177e4
LT		 993}
994
b37ad28b 995static __be32
1da177e4
LT		 996nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
997{
ca9cf9fc 998 __be32 status;
1da177e4 999
ca9cf9fc
CL		 1000 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_type) < 0)
1001 return nfserr_bad_xdr;
1da177e4 1002 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
ca9cf9fc
CL		 1003 return nfserr_bad_xdr;
1004 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_seqid) < 0)
1005 return nfserr_bad_xdr;
1006 status = nfsd4_decode_stateid4(argp, &locku->lu_stateid);
e31a1b66
BH		 1007 if (status)
1008 return status;
ca9cf9fc
CL		 1009 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_offset) < 0)
1010 return nfserr_bad_xdr;
1011 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_length) < 0)
1012 return nfserr_bad_xdr;
1da177e4 1013
ca9cf9fc 1014 return nfs_ok;
1da177e4
LT		 1015}
1016
b37ad28b 1017static __be32
1da177e4
LT		 1018nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
1019{
3d5877e8 1020 return nfsd4_decode_component4(argp, &lookup->lo_name, &lookup->lo_len);
1da177e4
LT		 1021}
1022
bf33bab3
CL		 1023static __be32
1024nfsd4_decode_createhow4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
1025{
1026 __be32 status;
1027
1028 if (xdr_stream_decode_u32(argp->xdr, &open->op_createmode) < 0)
1029 return nfserr_bad_xdr;
1030 switch (open->op_createmode) {
1031 case NFS4_CREATE_UNCHECKED:
1032 case NFS4_CREATE_GUARDED:
1033 status = nfsd4_decode_fattr4(argp, open->op_bmval,
1034 ARRAY_SIZE(open->op_bmval),
1035 &open->op_iattr, &open->op_acl,
1036 &open->op_label, &open->op_umask);
1037 if (status)
1038 return status;
1039 break;
1040 case NFS4_CREATE_EXCLUSIVE:
1041 status = nfsd4_decode_verifier4(argp, &open->op_verf);
1042 if (status)
1043 return status;
1044 break;
1045 case NFS4_CREATE_EXCLUSIVE4_1:
1046 if (argp->minorversion < 1)
1047 return nfserr_bad_xdr;
1048 status = nfsd4_decode_verifier4(argp, &open->op_verf);
1049 if (status)
1050 return status;
1051 status = nfsd4_decode_fattr4(argp, open->op_bmval,
1052 ARRAY_SIZE(open->op_bmval),
1053 &open->op_iattr, &open->op_acl,
1054 &open->op_label, &open->op_umask);
1055 if (status)
1056 return status;
1057 break;
1058 default:
1059 return nfserr_bad_xdr;
1060 }
1061
1062 return nfs_ok;
1063}
1064
e6ec04b2
CL		 1065static __be32
1066nfsd4_decode_openflag4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
1067{
1068 __be32 status;
1069
1070 if (xdr_stream_decode_u32(argp->xdr, &open->op_create) < 0)
1071 return nfserr_bad_xdr;
1072 switch (open->op_create) {
1073 case NFS4_OPEN_NOCREATE:
1074 break;
1075 case NFS4_OPEN_CREATE:
1076 status = nfsd4_decode_createhow4(argp, open);
1077 if (status)
1078 return status;
1079 break;
1080 default:
1081 return nfserr_bad_xdr;
1082 }
1083
1084 return nfs_ok;
1085}
1086
2c8bd7e0 1087static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664 1088{
04f9e664
BF		 1089 u32 w;
1090
9aa62f51
CL		 1091 if (xdr_stream_decode_u32(argp->xdr, &w) < 0)
1092 return nfserr_bad_xdr;
2c8bd7e0
BH		 1093 *share_access = w & NFS4_SHARE_ACCESS_MASK;
1094 *deleg_want = w & NFS4_SHARE_WANT_MASK;
1095 if (deleg_when)
1096 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
1097
04f9e664
BF		 1098 switch (w & NFS4_SHARE_ACCESS_MASK) {
1099 case NFS4_SHARE_ACCESS_READ:
1100 case NFS4_SHARE_ACCESS_WRITE:
1101 case NFS4_SHARE_ACCESS_BOTH:
1102 break;
1103 default:
1104 return nfserr_bad_xdr;
1105 }
fc0d14fe 1106 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 1107 if (!w)
1108 return nfs_ok;
1109 if (!argp->minorversion)
1110 return nfserr_bad_xdr;
1111 switch (w & NFS4_SHARE_WANT_MASK) {
1112 case NFS4_SHARE_WANT_NO_PREFERENCE:
1113 case NFS4_SHARE_WANT_READ_DELEG:
1114 case NFS4_SHARE_WANT_WRITE_DELEG:
1115 case NFS4_SHARE_WANT_ANY_DELEG:
1116 case NFS4_SHARE_WANT_NO_DELEG:
1117 case NFS4_SHARE_WANT_CANCEL:
1118 break;
1119 default:
1120 return nfserr_bad_xdr;
1121 }
92bac8c5 1122 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 1123 if (!w)
1124 return nfs_ok;
2c8bd7e0
BH		 1125
1126 if (!deleg_when) /* open_downgrade */
1127 return nfserr_inval;
04f9e664
BF		 1128 switch (w) {
1129 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
1130 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 1131 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
1132 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 1133 return nfs_ok;
1134 }
04f9e664
BF		 1135 return nfserr_bad_xdr;
1136}
1137
1138static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
1139{
b07bebd9
CL		 1140 if (xdr_stream_decode_u32(argp->xdr, x) < 0)
1141 return nfserr_bad_xdr;
1142 /* Note: unlike access bits, deny bits may be zero. */
01cd4afa 1143 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664 1144 return nfserr_bad_xdr;
b07bebd9 1145
04f9e664 1146 return nfs_ok;
04f9e664
BF		 1147}
1148
1708e50b
CL		 1149static __be32
1150nfsd4_decode_open_claim4(struct nfsd4_compoundargs *argp,
1151 struct nfsd4_open *open)
1152{
1153 __be32 status;
1154
1155 if (xdr_stream_decode_u32(argp->xdr, &open->op_claim_type) < 0)
1156 return nfserr_bad_xdr;
1157 switch (open->op_claim_type) {
1158 case NFS4_OPEN_CLAIM_NULL:
1159 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1160 status = nfsd4_decode_component4(argp, &open->op_fname,
1161 &open->op_fnamelen);
1162 if (status)
1163 return status;
1164 break;
1165 case NFS4_OPEN_CLAIM_PREVIOUS:
1166 if (xdr_stream_decode_u32(argp->xdr, &open->op_delegate_type) < 0)
1167 return nfserr_bad_xdr;
1168 break;
1169 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1170 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1171 if (status)
1172 return status;
1173 status = nfsd4_decode_component4(argp, &open->op_fname,
1174 &open->op_fnamelen);
1175 if (status)
1176 return status;
1177 break;
1178 case NFS4_OPEN_CLAIM_FH:
1179 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1180 if (argp->minorversion < 1)
1181 return nfserr_bad_xdr;
1182 /* void */
1183 break;
1184 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1185 if (argp->minorversion < 1)
1186 return nfserr_bad_xdr;
1187 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1188 if (status)
1189 return status;
1190 break;
1191 default:
1192 return nfserr_bad_xdr;
1193 }
1194
1195 return nfs_ok;
1196}
1197
b37ad28b 1198static __be32
1da177e4
LT		 1199nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
1200{
61e5e0b3 1201 __be32 status;
2c8bd7e0 1202 u32 dummy;
1da177e4
LT		 1203
1204 memset(open->op_bmval, 0, sizeof(open->op_bmval));
1205 open->op_iattr.ia_valid = 0;
fe0750e5 1206 open->op_openowner = NULL;
1da177e4 1207
9d313b17 1208 open->op_xdr_error = 0;
61e5e0b3
CL		 1209 if (xdr_stream_decode_u32(argp->xdr, &open->op_seqid) < 0)
1210 return nfserr_bad_xdr;
1211 /* deleg_want is ignored */
2c8bd7e0
BH		 1212 status = nfsd4_decode_share_access(argp, &open->op_share_access,
1213 &open->op_deleg_want, &dummy);
04f9e664 1214 if (status)
61e5e0b3 1215 return status;
04f9e664
BF		 1216 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
1217 if (status)
61e5e0b3
CL		 1218 return status;
1219 status = nfsd4_decode_state_owner4(argp, &open->op_clientid,
1220 &open->op_owner);
a084daf5 1221 if (status)
61e5e0b3 1222 return status;
e6ec04b2
CL		 1223 status = nfsd4_decode_openflag4(argp, open);
1224 if (status)
1225 return status;
61e5e0b3 1226 return nfsd4_decode_open_claim4(argp, open);
1da177e4
LT		 1227}
1228
b37ad28b 1229static __be32
1da177e4
LT		 1230nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1231{
06bee693 1232 __be32 status;
e1a90ebd
AS		 1233
1234 if (argp->minorversion >= 1)
1235 return nfserr_notsupp;
1236
06bee693 1237 status = nfsd4_decode_stateid4(argp, &open_conf->oc_req_stateid);
e31a1b66
BH		 1238 if (status)
1239 return status;
06bee693
CL		 1240 if (xdr_stream_decode_u32(argp->xdr, &open_conf->oc_seqid) < 0)
1241 return nfserr_bad_xdr;
e1a90ebd 1242
06bee693 1243 return nfs_ok;
1da177e4
LT		 1244}
1245
b37ad28b 1246static __be32
1da177e4
LT		 1247nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1248{
dca71651
CL		 1249 __be32 status;
1250
1251 status = nfsd4_decode_stateid4(argp, &open_down->od_stateid);
e31a1b66
BH		 1252 if (status)
1253 return status;
dca71651
CL		 1254 if (xdr_stream_decode_u32(argp->xdr, &open_down->od_seqid) < 0)
1255 return nfserr_bad_xdr;
1256 /* deleg_want is ignored */
2c8bd7e0
BH		 1257 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1258 &open_down->od_deleg_want, NULL);
04f9e664
BF		 1259 if (status)
1260 return status;
dca71651 1261 return nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1da177e4
LT		 1262}
1263
b37ad28b 1264static __be32
1da177e4
LT		 1265nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1266{
a73bed98 1267 __be32 *p;
1da177e4 1268
a73bed98
CL		 1269 if (xdr_stream_decode_u32(argp->xdr, &putfh->pf_fhlen) < 0)
1270 return nfserr_bad_xdr;
1da177e4 1271 if (putfh->pf_fhlen > NFS4_FHSIZE)
a73bed98
CL		 1272 return nfserr_bad_xdr;
1273 p = xdr_inline_decode(argp->xdr, putfh->pf_fhlen);
1274 if (!p)
1275 return nfserr_bad_xdr;
1276 putfh->pf_fhval = svcxdr_tmpalloc(argp, putfh->pf_fhlen);
1277 if (!putfh->pf_fhval)
1278 return nfserr_jukebox;
1279 memcpy(putfh->pf_fhval, p, putfh->pf_fhlen);
1da177e4 1280
a73bed98 1281 return nfs_ok;
1da177e4
LT		 1282}
1283
e1a90ebd
AS		 1284static __be32
1285nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1286{
1287 if (argp->minorversion == 0)
1288 return nfs_ok;
1289 return nfserr_notsupp;
1290}
1291
b37ad28b 1292static __be32
1da177e4
LT		 1293nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1294{
3909c3bc 1295 __be32 status;
1da177e4 1296
3909c3bc 1297 status = nfsd4_decode_stateid4(argp, &read->rd_stateid);
e31a1b66
BH		 1298 if (status)
1299 return status;
3909c3bc
CL		 1300 if (xdr_stream_decode_u64(argp->xdr, &read->rd_offset) < 0)
1301 return nfserr_bad_xdr;
1302 if (xdr_stream_decode_u32(argp->xdr, &read->rd_length) < 0)
1303 return nfserr_bad_xdr;
1da177e4 1304
3909c3bc 1305 return nfs_ok;
1da177e4
LT		 1306}
1307
b37ad28b 1308static __be32
1da177e4
LT		 1309nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1310{
0dfaf2a3 1311 __be32 status;
1da177e4 1312
0dfaf2a3
CL		 1313 if (xdr_stream_decode_u64(argp->xdr, &readdir->rd_cookie) < 0)
1314 return nfserr_bad_xdr;
1315 status = nfsd4_decode_verifier4(argp, &readdir->rd_verf);
1316 if (status)
1317 return status;
1318 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_dircount) < 0)
1319 return nfserr_bad_xdr;
1320 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_maxcount) < 0)
1321 return nfserr_bad_xdr;
1322 if (xdr_stream_decode_uint32_array(argp->xdr, readdir->rd_bmval,
1323 ARRAY_SIZE(readdir->rd_bmval)) < 0)
1324 return nfserr_bad_xdr;
1da177e4 1325
0dfaf2a3 1326 return nfs_ok;
1da177e4
LT		 1327}
1328
b37ad28b 1329static __be32
1da177e4
LT		 1330nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1331{
b7f5fbf2 1332 return nfsd4_decode_component4(argp, &remove->rm_name, &remove->rm_namelen);
1da177e4
LT		 1333}
1334
b37ad28b 1335static __be32
1da177e4
LT		 1336nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1337{
ba881a0a 1338 __be32 status;
1da177e4 1339
ba881a0a
CL		 1340 status = nfsd4_decode_component4(argp, &rename->rn_sname, &rename->rn_snamelen);
1341 if (status)
1da177e4 1342 return status;
ba881a0a 1343 return nfsd4_decode_component4(argp, &rename->rn_tname, &rename->rn_tnamelen);
1da177e4
LT		 1344}
1345
b37ad28b 1346static __be32
1da177e4
LT		 1347nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1348{
d12f9045 1349 return nfsd4_decode_clientid4(argp, clientid);
1da177e4
LT		 1350}
1351
dcb488a3
AA		 1352static __be32
1353nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1354 struct nfsd4_secinfo *secinfo)
1355{
d0abdae5 1356 return nfsd4_decode_component4(argp, &secinfo->si_name, &secinfo->si_namelen);
dcb488a3
AA		 1357}
1358
b37ad28b 1359static __be32
1da177e4
LT		 1360nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1361{
e31a1b66 1362 __be32 status;
1da177e4 1363
44592fe9 1364 status = nfsd4_decode_stateid4(argp, &setattr->sa_stateid);
e31a1b66
BH		 1365 if (status)
1366 return status;
d1c263a0
CL		 1367 return nfsd4_decode_fattr4(argp, setattr->sa_bmval,
1368 ARRAY_SIZE(setattr->sa_bmval),
1369 &setattr->sa_iattr, &setattr->sa_acl,
1370 &setattr->sa_label, NULL);
1da177e4
LT		 1371}
1372
b37ad28b 1373static __be32
1da177e4
LT		 1374nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1375{
92fa6c08 1376 __be32 *p, status;
1da177e4 1377
e1a90ebd
AS		 1378 if (argp->minorversion >= 1)
1379 return nfserr_notsupp;
1380
92fa6c08
CL		 1381 status = nfsd4_decode_verifier4(argp, &setclientid->se_verf);
1382 if (status)
1383 return status;
a084daf5
BF		 1384 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1385 if (status)
92fa6c08
CL		 1386 return status;
1387 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_prog) < 0)
a084daf5 1388 return nfserr_bad_xdr;
92fa6c08
CL		 1389 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_netid_len) < 0)
1390 return nfserr_bad_xdr;
1391 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_netid_len);
1392 if (!p)
1393 return nfserr_bad_xdr;
1394 setclientid->se_callback_netid_val = svcxdr_tmpalloc(argp,
1395 setclientid->se_callback_netid_len);
1396 if (!setclientid->se_callback_netid_val)
1397 return nfserr_jukebox;
1398 memcpy(setclientid->se_callback_netid_val, p,
1399 setclientid->se_callback_netid_len);
1da177e4 1400
92fa6c08
CL		 1401 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_addr_len) < 0)
1402 return nfserr_bad_xdr;
1403 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_addr_len);
1404 if (!p)
1405 return nfserr_bad_xdr;
1406 setclientid->se_callback_addr_val = svcxdr_tmpalloc(argp,
1407 setclientid->se_callback_addr_len);
1408 if (!setclientid->se_callback_addr_val)
1409 return nfserr_jukebox;
1410 memcpy(setclientid->se_callback_addr_val, p,
1411 setclientid->se_callback_addr_len);
1412 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_ident) < 0)
1413 return nfserr_bad_xdr;
1da177e4 1414
92fa6c08 1415 return nfs_ok;
1da177e4
LT		 1416}
1417
b37ad28b 1418static __be32
1da177e4
LT		 1419nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1420{
d1ca5514 1421 __be32 status;
1da177e4 1422
e1a90ebd
AS		 1423 if (argp->minorversion >= 1)
1424 return nfserr_notsupp;
1425
d1ca5514
CL		 1426 status = nfsd4_decode_clientid4(argp, &scd_c->sc_clientid);
1427 if (status)
1428 return status;
1429 return nfsd4_decode_verifier4(argp, &scd_c->sc_confirm);
1da177e4
LT		 1430}
1431
1432/* Also used for NVERIFY */
b37ad28b 1433static __be32
1da177e4
LT		 1434nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1435{
67cd453e 1436 __be32 *p, status;
1da177e4 1437
67cd453e
CL		 1438 status = nfsd4_decode_bitmap4(argp, verify->ve_bmval,
1439 ARRAY_SIZE(verify->ve_bmval));
1440 if (status)
1441 return status;
1da177e4
LT		 1442
1443 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1444 * nfsd4_proc_verify */
1445
67cd453e
CL		 1446 if (xdr_stream_decode_u32(argp->xdr, &verify->ve_attrlen) < 0)
1447 return nfserr_bad_xdr;
1448 p = xdr_inline_decode(argp->xdr, verify->ve_attrlen);
1449 if (!p)
1450 return nfserr_bad_xdr;
1451 verify->ve_attrval = svcxdr_tmpalloc(argp, verify->ve_attrlen);
1452 if (!verify->ve_attrval)
1453 return nfserr_jukebox;
1454 memcpy(verify->ve_attrval, p, verify->ve_attrlen);
1da177e4 1455
67cd453e 1456 return nfs_ok;
1da177e4
LT		 1457}
1458
b37ad28b 1459static __be32
1da177e4
LT		 1460nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1461{
244e2bef 1462 __be32 status;
1da177e4 1463
244e2bef 1464 status = nfsd4_decode_stateid4(argp, &write->wr_stateid);
e31a1b66
BH		 1465 if (status)
1466 return status;
244e2bef
CL		 1467 if (xdr_stream_decode_u64(argp->xdr, &write->wr_offset) < 0)
1468 return nfserr_bad_xdr;
1469 if (xdr_stream_decode_u32(argp->xdr, &write->wr_stable_how) < 0)
1470 return nfserr_bad_xdr;
54bbb7d2 1471 if (write->wr_stable_how > NFS_FILE_SYNC)
244e2bef
CL		 1472 return nfserr_bad_xdr;
1473 if (xdr_stream_decode_u32(argp->xdr, &write->wr_buflen) < 0)
1474 return nfserr_bad_xdr;
c1346a12 1475 if (!xdr_stream_subsegment(argp->xdr, &write->wr_payload, write->wr_buflen))
244e2bef 1476 return nfserr_bad_xdr;
1da177e4 1477
244e2bef 1478 return nfs_ok;
1da177e4
LT		 1479}
1480
b37ad28b 1481static __be32
1da177e4
LT		 1482nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1483{
a4a80c15 1484 __be32 status;
1da177e4 1485
e1a90ebd
AS		 1486 if (argp->minorversion >= 1)
1487 return nfserr_notsupp;
1488
a4a80c15
CL		 1489 status = nfsd4_decode_state_owner4(argp, &rlockowner->rl_clientid,
1490 &rlockowner->rl_owner);
1491 if (status)
1492 return status;
1da177e4 1493
60adfc50
AA		 1494 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1495 return nfserr_inval;
a4a80c15
CL		 1496
1497 return nfs_ok;
1da177e4
LT		 1498}
1499
0f81d960
CL		 1500static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
1501{
1502 if (xdr_stream_decode_u32(argp->xdr, &bc->bc_cb_program) < 0)
1503 return nfserr_bad_xdr;
1504 return nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
1505}
1506
571e0451
CL		 1507static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
1508{
1509 u32 use_conn_in_rdma_mode;
1510 __be32 status;
1511
1512 status = nfsd4_decode_sessionid4(argp, &bcts->sessionid);
1513 if (status)
1514 return status;
1515 if (xdr_stream_decode_u32(argp->xdr, &bcts->dir) < 0)
1516 return nfserr_bad_xdr;
1517 if (xdr_stream_decode_u32(argp->xdr, &use_conn_in_rdma_mode) < 0)
1518 return nfserr_bad_xdr;
1519
1520 return nfs_ok;
1521}
1522
2548aa78
CL		 1523static __be32
1524nfsd4_decode_state_protect_ops(struct nfsd4_compoundargs *argp,
1525 struct nfsd4_exchange_id *exid)
1526{
1527 __be32 status;
1528
1529 status = nfsd4_decode_bitmap4(argp, exid->spo_must_enforce,
1530 ARRAY_SIZE(exid->spo_must_enforce));
1531 if (status)
1532 return nfserr_bad_xdr;
1533 status = nfsd4_decode_bitmap4(argp, exid->spo_must_allow,
1534 ARRAY_SIZE(exid->spo_must_allow));
1535 if (status)
1536 return nfserr_bad_xdr;
1537
1538 return nfs_ok;
1539}
1540
547bfeb4
CL		 1541/*
1542 * This implementation currently does not support SP4_SSV.
1543 * This decoder simply skips over these arguments.
1544 */
1545static noinline __be32
1546nfsd4_decode_ssv_sp_parms(struct nfsd4_compoundargs *argp,
1547 struct nfsd4_exchange_id *exid)
1548{
1549 u32 count, window, num_gss_handles;
1550 __be32 status;
1551
1552 /* ssp_ops */
1553 status = nfsd4_decode_state_protect_ops(argp, exid);
1554 if (status)
1555 return status;
1556
1557 /* ssp_hash_algs<> */
1558 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1559 return nfserr_bad_xdr;
1560 while (count--) {
1561 status = nfsd4_decode_ignored_string(argp, 0);
1562 if (status)
1563 return status;
1564 }
1565
1566 /* ssp_encr_algs<> */
1567 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1568 return nfserr_bad_xdr;
1569 while (count--) {
1570 status = nfsd4_decode_ignored_string(argp, 0);
1571 if (status)
1572 return status;
1573 }
1574
1575 if (xdr_stream_decode_u32(argp->xdr, &window) < 0)
1576 return nfserr_bad_xdr;
1577 if (xdr_stream_decode_u32(argp->xdr, &num_gss_handles) < 0)
1578 return nfserr_bad_xdr;
1579
1580 return nfs_ok;
1581}
1582
2db134eb 1583static __be32
523ec6ed
CL		 1584nfsd4_decode_state_protect4_a(struct nfsd4_compoundargs *argp,
1585 struct nfsd4_exchange_id *exid)
2db134eb 1586{
523ec6ed 1587 __be32 status;
0733d213 1588
523ec6ed 1589 if (xdr_stream_decode_u32(argp->xdr, &exid->spa_how) < 0)
a084daf5 1590 return nfserr_bad_xdr;
0733d213
AA		 1591 switch (exid->spa_how) {
1592 case SP4_NONE:
1593 break;
1594 case SP4_MACH_CRED:
2548aa78 1595 status = nfsd4_decode_state_protect_ops(argp, exid);
ed941643 1596 if (status)
2548aa78 1597 return status;
0733d213
AA		 1598 break;
1599 case SP4_SSV:
547bfeb4 1600 status = nfsd4_decode_ssv_sp_parms(argp, exid);
2548aa78
CL		 1601 if (status)
1602 return status;
0733d213
AA		 1603 break;
1604 default:
523ec6ed 1605 return nfserr_bad_xdr;
0733d213
AA		 1606 }
1607
523ec6ed
CL		 1608 return nfs_ok;
1609}
1610
10ff8422
CL		 1611static __be32
1612nfsd4_decode_nfs_impl_id4(struct nfsd4_compoundargs *argp,
1613 struct nfsd4_exchange_id *exid)
1614{
1615 __be32 status;
1616 u32 count;
1617
1618 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1619 return nfserr_bad_xdr;
1620 switch (count) {
1621 case 0:
1622 break;
1623 case 1:
1624 /* Note that RFC 8881 places no length limit on
1625 * nii_domain, but this implementation permits no
1626 * more than NFS4_OPAQUE_LIMIT bytes */
1627 status = nfsd4_decode_opaque(argp, &exid->nii_domain);
1628 if (status)
1629 return status;
1630 /* Note that RFC 8881 places no length limit on
1631 * nii_name, but this implementation permits no
1632 * more than NFS4_OPAQUE_LIMIT bytes */
1633 status = nfsd4_decode_opaque(argp, &exid->nii_name);
1634 if (status)
1635 return status;
1636 status = nfsd4_decode_nfstime4(argp, &exid->nii_time);
1637 if (status)
1638 return status;
1639 break;
1640 default:
1641 return nfserr_bad_xdr;
1642 }
1643
1644 return nfs_ok;
1645}
1646
523ec6ed
CL		 1647static __be32
1648nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1649 struct nfsd4_exchange_id *exid)
1650{
10ff8422 1651 __be32 status;
523ec6ed
CL		 1652
1653 status = nfsd4_decode_verifier4(argp, &exid->verifier);
1654 if (status)
1655 return status;
1656 status = nfsd4_decode_opaque(argp, &exid->clname);
1657 if (status)
1658 return status;
1659 if (xdr_stream_decode_u32(argp->xdr, &exid->flags) < 0)
1660 return nfserr_bad_xdr;
1661 status = nfsd4_decode_state_protect4_a(argp, exid);
1662 if (status)
1663 return status;
10ff8422 1664 return nfsd4_decode_nfs_impl_id4(argp, exid);
2db134eb
AA		 1665}
1666
3a3f1fba
CL		 1667static __be32
1668nfsd4_decode_channel_attrs4(struct nfsd4_compoundargs *argp,
1669 struct nfsd4_channel_attrs *ca)
1670{
1671 __be32 *p;
1672
1673 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 7);
1674 if (!p)
1675 return nfserr_bad_xdr;
1676
1677 /* headerpadsz is ignored */
1678 p++;
1679 ca->maxreq_sz = be32_to_cpup(p++);
1680 ca->maxresp_sz = be32_to_cpup(p++);
1681 ca->maxresp_cached = be32_to_cpup(p++);
1682 ca->maxops = be32_to_cpup(p++);
1683 ca->maxreqs = be32_to_cpup(p++);
1684 ca->nr_rdma_attrs = be32_to_cpup(p);
1685 switch (ca->nr_rdma_attrs) {
1686 case 0:
1687 break;
1688 case 1:
1689 if (xdr_stream_decode_u32(argp->xdr, &ca->rdma_attrs) < 0)
1690 return nfserr_bad_xdr;
1691 break;
1692 default:
1693 return nfserr_bad_xdr;
1694 }
1695
1696 return nfs_ok;
1697}
1698
2db134eb
AA		 1699static __be32
1700nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1701 struct nfsd4_create_session *sess)
1702{
81243e3f 1703 __be32 status;
ec6b5d7b 1704
81243e3f
CL		 1705 status = nfsd4_decode_clientid4(argp, &sess->clientid);
1706 if (status)
1707 return status;
1708 if (xdr_stream_decode_u32(argp->xdr, &sess->seqid) < 0)
1709 return nfserr_bad_xdr;
1710 if (xdr_stream_decode_u32(argp->xdr, &sess->flags) < 0)
1711 return nfserr_bad_xdr;
3a3f1fba
CL		 1712 status = nfsd4_decode_channel_attrs4(argp, &sess->fore_channel);
1713 if (status)
1714 return status;
1715 status = nfsd4_decode_channel_attrs4(argp, &sess->back_channel);
81243e3f
CL		 1716 if (status)
1717 return status;
1718 if (xdr_stream_decode_u32(argp->xdr, &sess->callback_prog) < 0)
1719 return nfserr_bad_xdr;
1720 status = nfsd4_decode_cb_sec(argp, &sess->cb_sec);
3a3f1fba
CL		 1721 if (status)
1722 return status;
ec6b5d7b 1723
81243e3f 1724 return nfs_ok;
2db134eb
AA		 1725}
1726
1727static __be32
1728nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1729 struct nfsd4_destroy_session *destroy_session)
1730{
94e254af 1731 return nfsd4_decode_sessionid4(argp, &destroy_session->sessionid);
2db134eb
AA		 1732}
1733
e1ca12df
BS		 1734static __be32
1735nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1736 struct nfsd4_free_stateid *free_stateid)
1737{
aec387d5 1738 return nfsd4_decode_stateid4(argp, &free_stateid->fr_stateid);
e1ca12df
BS		 1739}
1740
345c2842
MJ		 1741static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1742{
1743 DECODE_HEAD;
1744
1745 READ_BUF(8);
1746 COPYMEM(&dc->clientid, 8);
1747
1748 DECODE_TAIL;
1749}
1750
4dc6ec00
BF		 1751static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1752{
1753 DECODE_HEAD;
1754
1755 READ_BUF(4);
06553991 1756 rc->rca_one_fs = be32_to_cpup(p++);
4dc6ec00
BF		 1757
1758 DECODE_TAIL;
1759}
1760
9cf514cc
CH		 1761#ifdef CONFIG_NFSD_PNFS
1762static __be32
1763nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1764 struct nfsd4_getdeviceinfo *gdev)
1765{
04495971
CL		 1766 __be32 status;
1767
1768 status = nfsd4_decode_deviceid4(argp, &gdev->gd_devid);
1769 if (status)
1770 return status;
1771 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_layout_type) < 0)
1772 return nfserr_bad_xdr;
1773 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_maxcount) < 0)
1774 return nfserr_bad_xdr;
1775 if (xdr_stream_decode_uint32_array(argp->xdr,
1776 &gdev->gd_notify_types, 1) < 0)
1777 return nfserr_bad_xdr;
1778
1779 return nfs_ok;
9cf514cc
CH		 1780}
1781
5185980d
CL		 1782static __be32
1783nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1784 struct nfsd4_layoutcommit *lcp)
1785{
1786 __be32 *p, status;
1787
1788 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.offset) < 0)
1789 return nfserr_bad_xdr;
1790 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.length) < 0)
1791 return nfserr_bad_xdr;
1792 if (xdr_stream_decode_bool(argp->xdr, &lcp->lc_reclaim) < 0)
1793 return nfserr_bad_xdr;
1794 status = nfsd4_decode_stateid4(argp, &lcp->lc_sid);
1795 if (status)
1796 return status;
1797 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_newoffset) < 0)
1798 return nfserr_bad_xdr;
1799 if (lcp->lc_newoffset) {
1800 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_last_wr) < 0)
1801 return nfserr_bad_xdr;
1802 } else
1803 lcp->lc_last_wr = 0;
1804 p = xdr_inline_decode(argp->xdr, XDR_UNIT);
1805 if (!p)
1806 return nfserr_bad_xdr;
1807 if (xdr_item_is_present(p)) {
1808 status = nfsd4_decode_nfstime4(argp, &lcp->lc_mtime);
1809 if (status)
1810 return status;
1811 } else {
1812 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1813 }
1814 return nfsd4_decode_layoutupdate4(argp, lcp);
1815}
1816
9cf514cc
CH		 1817static __be32
1818nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1819 struct nfsd4_layoutget *lgp)
1820{
c8e88e3a 1821 __be32 status;
db59c0ef 1822
c8e88e3a
CL		 1823 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_signal) < 0)
1824 return nfserr_bad_xdr;
1825 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_layout_type) < 0)
1826 return nfserr_bad_xdr;
1827 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_seg.iomode) < 0)
1828 return nfserr_bad_xdr;
1829 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.offset) < 0)
1830 return nfserr_bad_xdr;
1831 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.length) < 0)
1832 return nfserr_bad_xdr;
1833 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_minlength) < 0)
1834 return nfserr_bad_xdr;
1835 status = nfsd4_decode_stateid4(argp, &lgp->lg_sid);
db59c0ef
KM		 1836 if (status)
1837 return status;
c8e88e3a
CL		 1838 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_maxcount) < 0)
1839 return nfserr_bad_xdr;
db59c0ef 1840
c8e88e3a 1841 return nfs_ok;
9cf514cc
CH		 1842}
1843
9cf514cc
CH		 1844static __be32
1845nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1846 struct nfsd4_layoutreturn *lrp)
1847{
645fcad3
CL		 1848 if (xdr_stream_decode_bool(argp->xdr, &lrp->lr_reclaim) < 0)
1849 return nfserr_bad_xdr;
1850 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_layout_type) < 0)
1851 return nfserr_bad_xdr;
1852 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_seg.iomode) < 0)
1853 return nfserr_bad_xdr;
1854 return nfsd4_decode_layoutreturn4(argp, lrp);
9cf514cc
CH		 1855}
1856#endif /* CONFIG_NFSD_PNFS */
1857
53d70873
CL		 1858static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1859 struct nfsd4_secinfo_no_name *sin)
1860{
1861 if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0)
1862 return nfserr_bad_xdr;
1863 return nfs_ok;
1864}
1865
cf907b11
CL		 1866static __be32
1867nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1868 struct nfsd4_sequence *seq)
1869{
1870 __be32 *p, status;
1871
1872 status = nfsd4_decode_sessionid4(argp, &seq->sessionid);
1873 if (status)
1874 return status;
1875 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 4);
1876 if (!p)
1877 return nfserr_bad_xdr;
1878 seq->seqid = be32_to_cpup(p++);
1879 seq->slotid = be32_to_cpup(p++);
1880 seq->maxslots = be32_to_cpup(p++);
1881 seq->cachethis = be32_to_cpup(p);
1882
1883 return nfs_ok;
1884}
1885
b7a0c8f6
CL		 1886static __be32
1887nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1888{
1889 struct nfsd4_test_stateid_id *stateid;
1890 __be32 status;
1891 u32 i;
1892
1893 if (xdr_stream_decode_u32(argp->xdr, &test_stateid->ts_num_ids) < 0)
1894 return nfserr_bad_xdr;
1895
1896 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1897 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1898 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1899 if (!stateid)
1900 return nfserrno(-ENOMEM); /* XXX: not jukebox? */
1901 INIT_LIST_HEAD(&stateid->ts_id_list);
1902 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1903 status = nfsd4_decode_stateid4(argp, &stateid->ts_id_stateid);
1904 if (status)
1905 return status;
1906 }
1907
1908 return nfs_ok;
1909}
1910
95d871f0
AS		 1911static __be32
1912nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1913 struct nfsd4_fallocate *fallocate)
1914{
1915 DECODE_HEAD;
1916
1917 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1918 if (status)
1919 return status;
1920
1921 READ_BUF(16);
1922 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1923 xdr_decode_hyper(p, &fallocate->falloc_length);
1924
1925 DECODE_TAIL;
1926}
1927
ffa0160a
CH		 1928static __be32
1929nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1930{
1931 DECODE_HEAD;
1932
1933 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1934 if (status)
1935 return status;
1936 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1937 if (status)
1938 return status;
1939
1940 READ_BUF(8 + 8 + 8);
1941 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1942 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1943 p = xdr_decode_hyper(p, &clone->cl_count);
1944 DECODE_TAIL;
1945}
1946
84e1b21d
OK		 1947static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
1948 struct nl4_server *ns)
1949{
1950 DECODE_HEAD;
1951 struct nfs42_netaddr *naddr;
1952
1953 READ_BUF(4);
1954 ns->nl4_type = be32_to_cpup(p++);
1955
1956 /* currently support for 1 inter-server source server */
1957 switch (ns->nl4_type) {
1958 case NL4_NETADDR:
1959 naddr = &ns->u.nl4_addr;
1960
1961 READ_BUF(4);
1962 naddr->netid_len = be32_to_cpup(p++);
1963 if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
1964 goto xdr_error;
1965
1966 READ_BUF(naddr->netid_len + 4); /* 4 for uaddr len */
1967 COPYMEM(naddr->netid, naddr->netid_len);
1968
1969 naddr->addr_len = be32_to_cpup(p++);
1970 if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
1971 goto xdr_error;
1972
1973 READ_BUF(naddr->addr_len);
1974 COPYMEM(naddr->addr, naddr->addr_len);
1975 break;
1976 default:
1977 goto xdr_error;
1978 }
1979 DECODE_TAIL;
1980}
1981
29ae7f9d
AS		 1982static __be32
1983nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1984{
1985 DECODE_HEAD;
84e1b21d
OK		 1986 struct nl4_server *ns_dummy;
1987 int i, count;
29ae7f9d
AS		 1988
1989 status = nfsd4_decode_stateid(argp, &copy->cp_src_stateid);
1990 if (status)
1991 return status;
1992 status = nfsd4_decode_stateid(argp, &copy->cp_dst_stateid);
1993 if (status)
1994 return status;
1995
1996 READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
1997 p = xdr_decode_hyper(p, &copy->cp_src_pos);
1998 p = xdr_decode_hyper(p, &copy->cp_dst_pos);
1999 p = xdr_decode_hyper(p, &copy->cp_count);
edcc8452 2000 p++; /* ca_consecutive: we always do consecutive copies */
29ae7f9d 2001 copy->cp_synchronous = be32_to_cpup(p++);
84e1b21d
OK		 2002
2003 count = be32_to_cpup(p++);
2004
2005 copy->cp_intra = false;
2006 if (count == 0) { /* intra-server copy */
2007 copy->cp_intra = true;
2008 goto intra;
2009 }
2010
2011 /* decode all the supplied server addresses but use first */
2012 status = nfsd4_decode_nl4_server(argp, &copy->cp_src);
2013 if (status)
2014 return status;
2015
2016 ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
2017 if (ns_dummy == NULL)
2018 return nfserrno(-ENOMEM);
2019 for (i = 0; i < count - 1; i++) {
2020 status = nfsd4_decode_nl4_server(argp, ns_dummy);
2021 if (status) {
2022 kfree(ns_dummy);
2023 return status;
2024 }
2025 }
2026 kfree(ns_dummy);
2027intra:
29ae7f9d
AS		 2028
2029 DECODE_TAIL;
2030}
2031
6308bc98
OK		 2032static __be32
2033nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
2034 struct nfsd4_offload_status *os)
2035{
2036 return nfsd4_decode_stateid(argp, &os->stateid);
2037}
2038
51911868
OK		 2039static __be32
2040nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
2041 struct nfsd4_copy_notify *cn)
2042{
5aff7d08 2043 __be32 status;
51911868
OK		 2044
2045 status = nfsd4_decode_stateid(argp, &cn->cpn_src_stateid);
2046 if (status)
2047 return status;
2048 return nfsd4_decode_nl4_server(argp, &cn->cpn_dst);
2049}
2050
24bab491
AS		 2051static __be32
2052nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
2053{
2054 DECODE_HEAD;
2055
2056 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
2057 if (status)
2058 return status;
2059
2060 READ_BUF(8 + 4);
2061 p = xdr_decode_hyper(p, &seek->seek_offset);
2062 seek->seek_whence = be32_to_cpup(p);
2063
2064 DECODE_TAIL;
2065}
2066
23e50fe3
FL		 2067/*
2068 * XDR data that is more than PAGE_SIZE in size is normally part of a
2069 * read or write. However, the size of extended attributes is limited
2070 * by the maximum request size, and then further limited by the underlying
2071 * filesystem limits. This can exceed PAGE_SIZE (currently, XATTR_SIZE_MAX
2072 * is 64k). Since there is no kvec- or page-based interface to xattrs,
2073 * and we're not dealing with contiguous pages, we need to do some copying.
2074 */
2075
2076/*
c1346a12 2077 * Decode data into buffer.
23e50fe3
FL		 2078 */
2079static __be32
c1346a12
CL		 2080nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct xdr_buf *xdr,
2081 char **bufp, u32 buflen)
23e50fe3 2082{
c1346a12
CL		 2083 struct page **pages = xdr->pages;
2084 struct kvec *head = xdr->head;
23e50fe3
FL		 2085 char *tmp, *dp;
2086 u32 len;
2087
2088 if (buflen <= head->iov_len) {
2089 /*
2090 * We're in luck, the head has enough space. Just return
2091 * the head, no need for copying.
2092 */
2093 *bufp = head->iov_base;
2094 return 0;
2095 }
2096
2097 tmp = svcxdr_tmpalloc(argp, buflen);
2098 if (tmp == NULL)
2099 return nfserr_jukebox;
2100
2101 dp = tmp;
2102 memcpy(dp, head->iov_base, head->iov_len);
2103 buflen -= head->iov_len;
2104 dp += head->iov_len;
2105
2106 while (buflen > 0) {
2107 len = min_t(u32, buflen, PAGE_SIZE);
2108 memcpy(dp, page_address(*pages), len);
2109
2110 buflen -= len;
2111 dp += len;
2112 pages++;
2113 }
2114
2115 *bufp = tmp;
2116 return 0;
2117}
2118
2119/*
2120 * Get a user extended attribute name from the XDR buffer.
2121 * It will not have the "user." prefix, so prepend it.
2122 * Lastly, check for nul characters in the name.
2123 */
2124static __be32
2125nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep)
2126{
2127 DECODE_HEAD;
2128 char *name, *sp, *dp;
2129 u32 namelen, cnt;
2130
2131 READ_BUF(4);
2132 namelen = be32_to_cpup(p++);
2133
2134 if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN))
2135 return nfserr_nametoolong;
2136
2137 if (namelen == 0)
2138 goto xdr_error;
2139
2140 READ_BUF(namelen);
2141
2142 name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1);
2143 if (!name)
2144 return nfserr_jukebox;
2145
2146 memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2147
2148 /*
2149 * Copy the extended attribute name over while checking for 0
2150 * characters.
2151 */
2152 sp = (char *)p;
2153 dp = name + XATTR_USER_PREFIX_LEN;
2154 cnt = namelen;
2155
2156 while (cnt-- > 0) {
2157 if (*sp == '\0')
2158 goto xdr_error;
2159 *dp++ = *sp++;
2160 }
2161 *dp = '\0';
2162
2163 *namep = name;
2164
2165 DECODE_TAIL;
2166}
2167
2168/*
2169 * A GETXATTR op request comes without a length specifier. We just set the
2170 * maximum length for the reply based on XATTR_SIZE_MAX and the maximum
2171 * channel reply size. nfsd_getxattr will probe the length of the xattr,
2172 * check it against getxa_len, and allocate + return the value.
2173 */
2174static __be32
2175nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp,
2176 struct nfsd4_getxattr *getxattr)
2177{
2178 __be32 status;
2179 u32 maxcount;
2180
2181 status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name);
2182 if (status)
2183 return status;
2184
2185 maxcount = svc_max_payload(argp->rqstp);
2186 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2187
2188 getxattr->getxa_len = maxcount;
2189
2190 return status;
2191}
2192
2193static __be32
2194nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp,
2195 struct nfsd4_setxattr *setxattr)
2196{
2197 DECODE_HEAD;
2198 u32 flags, maxcount, size;
23e50fe3
FL		 2199
2200 READ_BUF(4);
2201 flags = be32_to_cpup(p++);
2202
2203 if (flags > SETXATTR4_REPLACE)
2204 return nfserr_inval;
2205 setxattr->setxa_flags = flags;
2206
2207 status = nfsd4_decode_xattr_name(argp, &setxattr->setxa_name);
2208 if (status)
2209 return status;
2210
2211 maxcount = svc_max_payload(argp->rqstp);
2212 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2213
2214 READ_BUF(4);
2215 size = be32_to_cpup(p++);
2216 if (size > maxcount)
2217 return nfserr_xattr2big;
2218
2219 setxattr->setxa_len = size;
2220 if (size > 0) {
c1346a12 2221 struct xdr_buf payload;
23e50fe3 2222
c1346a12
CL		 2223 if (!xdr_stream_subsegment(argp->xdr, &payload, size))
2224 goto xdr_error;
2225 status = nfsd4_vbuf_from_vector(argp, &payload,
2226 &setxattr->setxa_buf, size);
23e50fe3
FL		 2227 }
2228
2229 DECODE_TAIL;
2230}
2231
2232static __be32
2233nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp,
2234 struct nfsd4_listxattrs *listxattrs)
2235{
2236 DECODE_HEAD;
2237 u32 maxcount;
2238
2239 READ_BUF(12);
2240 p = xdr_decode_hyper(p, &listxattrs->lsxa_cookie);
2241
2242 /*
2243 * If the cookie is too large to have even one user.x attribute
2244 * plus trailing '\0' left in a maximum size buffer, it's invalid.
2245 */
2246 if (listxattrs->lsxa_cookie >=
2247 (XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2)))
2248 return nfserr_badcookie;
2249
2250 maxcount = be32_to_cpup(p++);
2251 if (maxcount < 8)
2252 /* Always need at least 2 words (length and one character) */
2253 return nfserr_inval;
2254
2255 maxcount = min(maxcount, svc_max_payload(argp->rqstp));
2256 listxattrs->lsxa_maxcount = maxcount;
2257
2258 DECODE_TAIL;
2259}
2260
2261static __be32
2262nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp,
2263 struct nfsd4_removexattr *removexattr)
2264{
2265 return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name);
2266}
2267
347e0ad9
BH		 2268static __be32
2269nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
2270{
2271 return nfs_ok;
2272}
2273
3c375c6f
BH		 2274static __be32
2275nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
2276{
1e685ec2 2277 return nfserr_notsupp;
3c375c6f
BH		 2278}
2279
347e0ad9
BH		 2280typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
2281
c1df609d 2282static const nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 2283 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
2284 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
2285 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
2286 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
2287 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
2288 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
2289 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
2290 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
2291 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
2292 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
2293 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
2294 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
2295 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
2296 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
2297 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2298 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
2299 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
2300 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
2301 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
2302 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 2303 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 2304 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
2305 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
2306 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
2307 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
2308 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
2309 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
2310 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
2311 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
2312 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
2313 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
2314 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
2315 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
2316 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
2317 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2318 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
2319 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 2320
2321 /* new operations for NFSv4.1 */
cb73a9f4 2322 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 2323 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 2324 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
2325 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
2326 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 2327 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae 2328 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc
CH		 2329#ifdef CONFIG_NFSD_PNFS
2330 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
2331 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2332 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
2333 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
2334 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
2335#else
9064caae
RD		 2336 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
2337 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2338 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
2339 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
2340 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc 2341#endif
04f4ad16 2342 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 2343 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
2344 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 2345 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 2346 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 2347 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 2348 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
87a15a80
AS		 2349
2350 /* new operations for NFSv4.2 */
95d871f0 2351 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
29ae7f9d 2352 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
51911868 2353 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_copy_notify,
b0cb9085 2354 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
87a15a80
AS		 2355 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
2356 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
2357 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
885e2bf3 2358 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status,
6308bc98 2359 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status,
528b8493 2360 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_read,
24bab491 2361 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
87a15a80 2362 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
ffa0160a 2363 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
23e50fe3
FL		 2364 /* RFC 8276 extended atributes operations */
2365 [OP_GETXATTR] = (nfsd4_dec)nfsd4_decode_getxattr,
2366 [OP_SETXATTR] = (nfsd4_dec)nfsd4_decode_setxattr,
2367 [OP_LISTXATTRS] = (nfsd4_dec)nfsd4_decode_listxattrs,
2368 [OP_REMOVEXATTR] = (nfsd4_dec)nfsd4_decode_removexattr,
2db134eb
AA		 2369};
2370
e1a90ebd
AS		 2371static inline bool
2372nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
2373{
8217d146 2374 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 2375 return false;
8217d146 2376 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 2377 return false;
8217d146
AS		 2378 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
2379 return false;
2380 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 2381 return false;
2382 return true;
2383}
f2feb96b 2384
b37ad28b 2385static __be32
1da177e4
LT		 2386nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
2387{
2388 DECODE_HEAD;
2389 struct nfsd4_op *op;
1091006c 2390 bool cachethis = false;
a5cddc88
BF		 2391 int auth_slack= argp->rqstp->rq_auth_slack;
2392 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 2393 int readcount = 0;
2394 int readbytes = 0;
1da177e4
LT		 2395 int i;
2396
1da177e4 2397 READ_BUF(4);
06553991 2398 argp->taglen = be32_to_cpup(p++);
4aed9c46 2399 READ_BUF(argp->taglen);
1da177e4 2400 SAVEMEM(argp->tag, argp->taglen);
4aed9c46 2401 READ_BUF(8);
06553991
BF		 2402 argp->minorversion = be32_to_cpup(p++);
2403 argp->opcnt = be32_to_cpup(p++);
4f0cefbf 2404 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 2405
2406 if (argp->taglen > NFSD4_MAX_TAGLEN)
2407 goto xdr_error;
0078117c
BF		 2408 /*
2409 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
2410 * here, so we return success at the xdr level so that
2411 * nfsd4_proc can handle this is an NFS-level error.
2412 */
2413 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
2414 return 0;
1da177e4 2415
e8c96f8c 2416 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
5d6031ca 2417 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1da177e4
LT		 2418 if (!argp->ops) {
2419 argp->ops = argp->iops;
817cb9d4 2420 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 2421 goto xdr_error;
2422 }
2423 }
2424
e1a90ebd 2425 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 2426 argp->opcnt = 0;
2427
1da177e4
LT		 2428 for (i = 0; i < argp->opcnt; i++) {
2429 op = &argp->ops[i];
2430 op->replay = NULL;
2431
8a61b18c 2432 READ_BUF(4);
06553991 2433 op->opnum = be32_to_cpup(p++);
1da177e4 2434
08281341 2435 if (nfsd4_opnum_in_range(argp, op)) {
e1a90ebd 2436 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
08281341
CL		 2437 if (op->status != nfs_ok)
2438 trace_nfsd_compound_decode_err(argp->rqstp,
2439 argp->opcnt, i,
2440 op->opnum,
2441 op->status);
2442 } else {
1da177e4
LT		 2443 op->opnum = OP_ILLEGAL;
2444 op->status = nfserr_op_illegal;
1da177e4 2445 }
f4f9ef4a 2446 op->opdesc = OPDESC(op);
1091006c
BF		 2447 /*
2448 * We'll try to cache the result in the DRC if any one
2449 * op in the compound wants to be cached:
2450 */
2451 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 2452
528b8493 2453 if (op->opnum == OP_READ || op->opnum == OP_READ_PLUS) {
b0e35fda
BF		 2454 readcount++;
2455 readbytes += nfsd4_max_reply(argp->rqstp, op);
2456 } else
2457 max_reply += nfsd4_max_reply(argp->rqstp, op);
f7b43d0c 2458 /*
7323f0d2
KM		 2459 * OP_LOCK and OP_LOCKT may return a conflicting lock.
2460 * (Special case because it will just skip encoding this
2461 * if it runs out of xdr buffer space, and it is the only
2462 * operation that behaves this way.)
f7b43d0c 2463 */
7323f0d2 2464 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
f7b43d0c 2465 max_reply += NFS4_OPAQUE_LIMIT;
e372ba60
BF		 2466
2467 if (op->status) {
2468 argp->opcnt = i+1;
2469 break;
2470 }
1da177e4 2471 }
1091006c
BF		 2472 /* Sessions make the DRC unnecessary: */
2473 if (argp->minorversion)
2474 cachethis = false;
b0e35fda 2475 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 2476 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 2477
a5cddc88 2478 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
779fb0f3 2479 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
b0e35fda 2480
1da177e4
LT		 2481 DECODE_TAIL;
2482}
1da177e4 2483
b8800921
N		 2484static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
2485 struct svc_export *exp)
c654b8a9 2486{
b8800921
N		 2487 if (exp->ex_flags & NFSEXP_V4ROOT) {
2488 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
2489 *p++ = 0;
2490 } else if (IS_I_VERSION(inode)) {
39ca1bf6 2491 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
c654b8a9 2492 } else {
d05d5744
BF		 2493 *p++ = cpu_to_be32(stat->ctime.tv_sec);
2494 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
c654b8a9 2495 }
d05d5744 2496 return p;
c654b8a9
BF		 2497}
2498
16945141
BF		 2499/*
2500 * ctime (in NFSv4, time_metadata) is not writeable, and the client
2501 * doesn't really care what resolution could theoretically be stored by
2502 * the filesystem.
2503 *
2504 * The client cares how close together changes can be while still
2505 * guaranteeing ctime changes. For most filesystems (which have
2506 * timestamps with nanosecond fields) that is limited by the resolution
2507 * of the time returned from current_time() (which I'm assuming to be
2508 * 1/HZ).
2509 */
2510static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
2511{
e4598e38 2512 struct timespec64 ts;
16945141
BF		 2513 u32 ns;
2514
2515 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
e4598e38 2516 ts = ns_to_timespec64(ns);
16945141
BF		 2517
2518 p = xdr_encode_hyper(p, ts.tv_sec);
2519 *p++ = cpu_to_be32(ts.tv_nsec);
2520
2521 return p;
2522}
2523
d05d5744 2524static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 2525{
d05d5744 2526 *p++ = cpu_to_be32(c->atomic);
c654b8a9 2527 if (c->change_supported) {
d05d5744
BF		 2528 p = xdr_encode_hyper(p, c->before_change);
2529 p = xdr_encode_hyper(p, c->after_change);
c654b8a9 2530 } else {
d05d5744
BF		 2531 *p++ = cpu_to_be32(c->before_ctime_sec);
2532 *p++ = cpu_to_be32(c->before_ctime_nsec);
2533 *p++ = cpu_to_be32(c->after_ctime_sec);
2534 *p++ = cpu_to_be32(c->after_ctime_nsec);
c654b8a9 2535 }
d05d5744 2536 return p;
c654b8a9 2537}
1da177e4 2538
81c3f413 2539/* Encode as an array of strings the string given with components
e7a0444a 2540 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 2541 */
ddd1ea56
BF		 2542static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2543 char *components, char esc_enter,
2544 char esc_exit)
81c3f413 2545{
ddd1ea56 2546 __be32 *p;
082d4bd7
BF		 2547 __be32 pathlen;
2548 int pathlen_offset;
81c3f413 2549 int strlen, count=0;
e7a0444a 2550 char *str, *end, *next;
81c3f413
BF		 2551
2552 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 2553
2554 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 2555 p = xdr_reserve_space(xdr, 4);
2556 if (!p)
81c3f413 2557 return nfserr_resource;
082d4bd7
BF		 2558 p++; /* We will fill this in with @count later */
2559
81c3f413
BF		 2560 end = str = components;
2561 while (*end) {
e7a0444a
WAA		 2562 bool found_esc = false;
2563
2564 /* try to parse as esc_start, ..., esc_end, sep */
2565 if (*str == esc_enter) {
2566 for (; *end && (*end != esc_exit); end++)
2567 /* find esc_exit or end of string */;
2568 next = end + 1;
2569 if (*end && (!*next || *next == sep)) {
2570 str++;
2571 found_esc = true;
2572 }
2573 }
2574
2575 if (!found_esc)
2576 for (; *end && (*end != sep); end++)
2577 /* find sep or end of string */;
2578
81c3f413
BF		 2579 strlen = end - str;
2580 if (strlen) {
ddd1ea56
BF		 2581 p = xdr_reserve_space(xdr, strlen + 4);
2582 if (!p)
81c3f413 2583 return nfserr_resource;
0c0c267b 2584 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 2585 count++;
2586 }
2587 else
2588 end++;
5a64e569
BC		 2589 if (found_esc)
2590 end = next;
2591
81c3f413
BF		 2592 str = end;
2593 }
bf7491f1 2594 pathlen = htonl(count);
082d4bd7 2595 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 2596 return 0;
2597}
2598
e7a0444a
WAA		 2599/* Encode as an array of strings the string given with components
2600 * separated @sep.
2601 */
ddd1ea56
BF		 2602static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2603 char *components)
e7a0444a 2604{
ddd1ea56 2605 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 2606}
2607
81c3f413
BF		 2608/*
2609 * encode a location element of a fs_locations structure
2610 */
ddd1ea56
BF		 2611static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2612 struct nfsd4_fs_location *location)
81c3f413 2613{
b37ad28b 2614 __be32 status;
81c3f413 2615
ddd1ea56 2616 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 2617 '[', ']');
81c3f413
BF		 2618 if (status)
2619 return status;
ddd1ea56 2620 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 2621 if (status)
2622 return status;
81c3f413
BF		 2623 return 0;
2624}
2625
2626/*
ed748aac 2627 * Encode a path in RFC3530 'pathname4' format
81c3f413 2628 */
ddd1ea56
BF		 2629static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2630 const struct path *root,
2631 const struct path *path)
81c3f413 2632{
301f0268 2633 struct path cur = *path;
ddd1ea56 2634 __be32 *p;
ed748aac
TM		 2635 struct dentry **components = NULL;
2636 unsigned int ncomponents = 0;
2637 __be32 err = nfserr_jukebox;
81c3f413 2638
ed748aac 2639 dprintk("nfsd4_encode_components(");
81c3f413 2640
ed748aac
TM		 2641 path_get(&cur);
2642 /* First walk the path up to the nfsd root, and store the
2643 * dentries/path components in an array.
2644 */
2645 for (;;) {
b77a4b2e 2646 if (path_equal(&cur, root))
ed748aac
TM		 2647 break;
2648 if (cur.dentry == cur.mnt->mnt_root) {
2649 if (follow_up(&cur))
2650 continue;
2651 goto out_free;
2652 }
2653 if ((ncomponents & 15) == 0) {
2654 struct dentry **new;
2655 new = krealloc(components,
2656 sizeof(*new) * (ncomponents + 16),
2657 GFP_KERNEL);
2658 if (!new)
2659 goto out_free;
2660 components = new;
2661 }
2662 components[ncomponents++] = cur.dentry;
2663 cur.dentry = dget_parent(cur.dentry);
2664 }
ddd1ea56
BF		 2665 err = nfserr_resource;
2666 p = xdr_reserve_space(xdr, 4);
2667 if (!p)
ed748aac 2668 goto out_free;
c373b0a4 2669 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 2670
2671 while (ncomponents) {
2672 struct dentry *dentry = components[ncomponents - 1];
301f0268 2673 unsigned int len;
ed748aac 2674
301f0268
AV		 2675 spin_lock(&dentry->d_lock);
2676 len = dentry->d_name.len;
ddd1ea56
BF		 2677 p = xdr_reserve_space(xdr, len + 4);
2678 if (!p) {
301f0268 2679 spin_unlock(&dentry->d_lock);
ed748aac 2680 goto out_free;
301f0268 2681 }
0c0c267b 2682 p = xdr_encode_opaque(p, dentry->d_name.name, len);
a455589f 2683 dprintk("/%pd", dentry);
301f0268 2684 spin_unlock(&dentry->d_lock);
ed748aac
TM		 2685 dput(dentry);
2686 ncomponents--;
81c3f413 2687 }
ed748aac 2688
ed748aac
TM		 2689 err = 0;
2690out_free:
2691 dprintk(")\n");
2692 while (ncomponents)
2693 dput(components[--ncomponents]);
2694 kfree(components);
2695 path_put(&cur);
2696 return err;
2697}
2698
ddd1ea56
BF		 2699static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2700 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 2701{
2702 struct svc_export *exp_ps;
2703 __be32 res;
2704
2705 exp_ps = rqst_find_fsidzero_export(rqstp);
2706 if (IS_ERR(exp_ps))
2707 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 2708 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 2709 exp_put(exp_ps);
2710 return res;
81c3f413
BF		 2711}
2712
2713/*
2714 * encode a fs_locations structure
2715 */
ddd1ea56
BF		 2716static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2717 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 2718{
b37ad28b 2719 __be32 status;
cc45f017 2720 int i;
ddd1ea56 2721 __be32 *p;
81c3f413 2722 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 2723
ddd1ea56 2724 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 2725 if (status)
2726 return status;
ddd1ea56
BF		 2727 p = xdr_reserve_space(xdr, 4);
2728 if (!p)
81c3f413 2729 return nfserr_resource;
c373b0a4 2730 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 2731 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 2732 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 2733 if (status)
2734 return status;
2735 }
81c3f413
BF		 2736 return 0;
2737}
1da177e4 2738
3d2544b1
BF		 2739static u32 nfs4_file_type(umode_t mode)
2740{
2741 switch (mode & S_IFMT) {
2742 case S_IFIFO: return NF4FIFO;
2743 case S_IFCHR: return NF4CHR;
2744 case S_IFDIR: return NF4DIR;
2745 case S_IFBLK: return NF4BLK;
2746 case S_IFLNK: return NF4LNK;
2747 case S_IFREG: return NF4REG;
2748 case S_IFSOCK: return NF4SOCK;
2749 default: return NF4BAD;
25fef48b 2750 }
3d2544b1 2751}
1da177e4 2752
b37ad28b 2753static inline __be32
ddd1ea56
BF		 2754nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2755 struct nfs4_ace *ace)
1da177e4 2756{
3554116d 2757 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 2758 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 2759 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 2760 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 2761 else
ddd1ea56 2762 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 2763}
2764
6896f15a 2765static inline __be32
8a4c3926 2766nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
6896f15a 2767{
8a4c3926
JL		 2768 __be32 *p;
2769 unsigned long i = hweight_long(layout_types);
6896f15a 2770
8a4c3926
JL		 2771 p = xdr_reserve_space(xdr, 4 + 4 * i);
2772 if (!p)
2773 return nfserr_resource;
2774
2775 *p++ = cpu_to_be32(i);
2776
2777 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2778 if (layout_types & (1 << i))
2779 *p++ = cpu_to_be32(i);
6896f15a
KM		 2780
2781 return 0;
2782}
2783
42ca0993
BF		 2784#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2785 FATTR4_WORD0_RDATTR_ERROR)
2786#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
c2227a39 2787#define WORD2_ABSENT_FS_ATTRS 0
42ca0993 2788
18032ca0
DQ		 2789#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2790static inline __be32
ddd1ea56
BF		 2791nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2792 void *context, int len)
18032ca0 2793{
ddd1ea56 2794 __be32 *p;
18032ca0 2795
ddd1ea56
BF		 2796 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2797 if (!p)
18032ca0
DQ		 2798 return nfserr_resource;
2799
2800 /*
2801 * For now we use a 0 here to indicate the null translation; in
2802 * the future we may place a call to translation code here.
2803 */
c373b0a4
BF		 2804 *p++ = cpu_to_be32(0); /* lfs */
2805 *p++ = cpu_to_be32(0); /* pi */
18032ca0 2806 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 2807 return 0;
2808}
2809#else
2810static inline __be32
ddd1ea56
BF		 2811nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2812 void *context, int len)
18032ca0
DQ		 2813{ return 0; }
2814#endif
2815
c2227a39 2816static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
42ca0993
BF		 2817{
2818 /* As per referral draft: */
2819 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2820 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2821 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2822 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2823 *rdattr_err = NFSERR_MOVED;
2824 else
2825 return nfserr_moved;
2826 }
2827 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2828 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
c2227a39 2829 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
42ca0993
BF		 2830 return 0;
2831}
1da177e4 2832
ae7095a7
BF		 2833
2834static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2835{
2836 struct path path = exp->ex_path;
2837 int err;
2838
2839 path_get(&path);
2840 while (follow_up(&path)) {
2841 if (path.dentry != path.mnt->mnt_root)
2842 break;
2843 }
a528d35e 2844 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
ae7095a7
BF		 2845 path_put(&path);
2846 return err;
2847}
2848
75976de6
KM		 2849static __be32
2850nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2851{
2852 __be32 *p;
2853
2854 if (bmval2) {
2855 p = xdr_reserve_space(xdr, 16);
2856 if (!p)
2857 goto out_resource;
2858 *p++ = cpu_to_be32(3);
2859 *p++ = cpu_to_be32(bmval0);
2860 *p++ = cpu_to_be32(bmval1);
2861 *p++ = cpu_to_be32(bmval2);
2862 } else if (bmval1) {
2863 p = xdr_reserve_space(xdr, 12);
2864 if (!p)
2865 goto out_resource;
2866 *p++ = cpu_to_be32(2);
2867 *p++ = cpu_to_be32(bmval0);
2868 *p++ = cpu_to_be32(bmval1);
2869 } else {
2870 p = xdr_reserve_space(xdr, 8);
2871 if (!p)
2872 goto out_resource;
2873 *p++ = cpu_to_be32(1);
2874 *p++ = cpu_to_be32(bmval0);
2875 }
2876
2877 return 0;
2878out_resource:
2879 return nfserr_resource;
2880}
2881
1da177e4
LT		 2882/*
2883 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2884 * ourselves.
1da177e4 2885 */
da2ebce6 2886static __be32
d5184658
BF		 2887nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2888 struct svc_export *exp,
2889 struct dentry *dentry, u32 *bmval,
406a7ea9 2890 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2891{
2892 u32 bmval0 = bmval[0];
2893 u32 bmval1 = bmval[1];
7e705706 2894 u32 bmval2 = bmval[2];
1da177e4 2895 struct kstat stat;
d50e6136 2896 struct svc_fh *tempfh = NULL;
1da177e4 2897 struct kstatfs statfs;
ddd1ea56 2898 __be32 *p;
1fcea5b2 2899 int starting_len = xdr->buf->len;
082d4bd7
BF		 2900 int attrlen_offset;
2901 __be32 attrlen;
1da177e4
LT		 2902 u32 dummy;
2903 u64 dummy64;
42ca0993 2904 u32 rdattr_err = 0;
b37ad28b 2905 __be32 status;
b8dd7b9a 2906 int err;
1da177e4 2907 struct nfs4_acl *acl = NULL;
0ab88ca4 2908#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2909 void *context = NULL;
2910 int contextlen;
0ab88ca4 2911#endif
18032ca0 2912 bool contextsupport = false;
7e705706
AA		 2913 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2914 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2915 struct path path = {
2916 .mnt = exp->ex_path.mnt,
2917 .dentry = dentry,
2918 };
3d733711 2919 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2920
2921 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
916d2d84 2922 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
1da177e4 2923
42ca0993 2924 if (exp->ex_fslocs.migrated) {
c2227a39 2925 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
42ca0993
BF		 2926 if (status)
2927 goto out;
2928 }
2929
a528d35e 2930 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
b8dd7b9a 2931 if (err)
1da177e4 2932 goto out_nfserr;
12337901
CH		 2933 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2934 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2935 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2936 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2937 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2938 if (err)
1da177e4
LT		 2939 goto out_nfserr;
2940 }
2941 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2942 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2943 status = nfserr_jukebox;
2944 if (!tempfh)
2945 goto out;
2946 fh_init(tempfh, NFS4_FHSIZE);
2947 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2948 if (status)
2949 goto out;
d50e6136 2950 fhp = tempfh;
1da177e4 2951 }
0c9d65e7 2952 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2953 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
0c9d65e7
AG		 2954 if (err == -EOPNOTSUPP)
2955 bmval0 &= ~FATTR4_WORD0_ACL;
2956 else if (err == -EINVAL) {
2957 status = nfserr_attrnotsupp;
2958 goto out;
2959 } else if (err != 0)
2960 goto out_nfserr;
1da177e4 2961 }
1da177e4 2962
18032ca0 2963#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
c2227a39
KM		 2964 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2965 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
32ddd944
BF		 2966 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2967 err = security_inode_getsecctx(d_inode(dentry),
18032ca0 2968 &context, &contextlen);
32ddd944
BF		 2969 else
2970 err = -EOPNOTSUPP;
18032ca0
DQ		 2971 contextsupport = (err == 0);
2972 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2973 if (err == -EOPNOTSUPP)
2974 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2975 else if (err)
2976 goto out_nfserr;
2977 }
2978 }
2979#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2980
75976de6
KM		 2981 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2982 if (status)
2983 goto out;
082d4bd7
BF		 2984
2985 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2986 p = xdr_reserve_space(xdr, 4);
2987 if (!p)
2988 goto out_resource;
082d4bd7 2989 p++; /* to be backfilled later */
1da177e4
LT		 2990
2991 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
dcd20869
BF		 2992 u32 supp[3];
2993
2994 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
7e705706 2995
0c9d65e7 2996 if (!IS_POSIXACL(dentry->d_inode))
916d2d84 2997 supp[0] &= ~FATTR4_WORD0_ACL;
18032ca0 2998 if (!contextsupport)
916d2d84
BF		 2999 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3000 if (!supp[2]) {
ddd1ea56
BF		 3001 p = xdr_reserve_space(xdr, 12);
3002 if (!p)
2b44f1ba 3003 goto out_resource;
c373b0a4 3004 *p++ = cpu_to_be32(2);
916d2d84
BF		 3005 *p++ = cpu_to_be32(supp[0]);
3006 *p++ = cpu_to_be32(supp[1]);
7e705706 3007 } else {
ddd1ea56
BF		 3008 p = xdr_reserve_space(xdr, 16);
3009 if (!p)
2b44f1ba 3010 goto out_resource;
c373b0a4 3011 *p++ = cpu_to_be32(3);
916d2d84
BF		 3012 *p++ = cpu_to_be32(supp[0]);
3013 *p++ = cpu_to_be32(supp[1]);
3014 *p++ = cpu_to_be32(supp[2]);
7e705706 3015 }
1da177e4
LT		 3016 }
3017 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 3018 p = xdr_reserve_space(xdr, 4);
3019 if (!p)
1da177e4 3020 goto out_resource;
3d2544b1 3021 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 3022 if (dummy == NF4BAD) {
3023 status = nfserr_serverfault;
3024 goto out;
3025 }
c373b0a4 3026 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 3027 }
3028 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 3029 p = xdr_reserve_space(xdr, 4);
3030 if (!p)
1da177e4 3031 goto out_resource;
49640001 3032 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 3033 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 3034 else
c373b0a4
BF		 3035 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
3036 NFS4_FH_VOL_RENAME);
1da177e4
LT		 3037 }
3038 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 3039 p = xdr_reserve_space(xdr, 8);
3040 if (!p)
1da177e4 3041 goto out_resource;
b8800921 3042 p = encode_change(p, &stat, d_inode(dentry), exp);
1da177e4
LT		 3043 }
3044 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 3045 p = xdr_reserve_space(xdr, 8);
3046 if (!p)
1da177e4 3047 goto out_resource;
b64c7f3b 3048 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 3049 }
3050 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 3051 p = xdr_reserve_space(xdr, 4);
3052 if (!p)
1da177e4 3053 goto out_resource;
c373b0a4 3054 *p++ = cpu_to_be32(1);
1da177e4
LT		 3055 }
3056 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 3057 p = xdr_reserve_space(xdr, 4);
3058 if (!p)
1da177e4 3059 goto out_resource;
c373b0a4 3060 *p++ = cpu_to_be32(1);
1da177e4
LT		 3061 }
3062 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 3063 p = xdr_reserve_space(xdr, 4);
3064 if (!p)
1da177e4 3065 goto out_resource;
c373b0a4 3066 *p++ = cpu_to_be32(0);
1da177e4
LT		 3067 }
3068 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 3069 p = xdr_reserve_space(xdr, 16);
3070 if (!p)
1da177e4 3071 goto out_resource;
42ca0993 3072 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 3073 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
3074 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 3075 } else switch(fsid_source(fhp)) {
3076 case FSIDSOURCE_FSID:
b64c7f3b
BF		 3077 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
3078 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 3079 break;
3080 case FSIDSOURCE_DEV:
c373b0a4
BF		 3081 *p++ = cpu_to_be32(0);
3082 *p++ = cpu_to_be32(MAJOR(stat.dev));
3083 *p++ = cpu_to_be32(0);
3084 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 3085 break;
3086 case FSIDSOURCE_UUID:
94eb3689
KM		 3087 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
3088 EX_UUID_LEN);
af6a4e28 3089 break;
1da177e4
LT		 3090 }
3091 }
3092 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 3093 p = xdr_reserve_space(xdr, 4);
3094 if (!p)
1da177e4 3095 goto out_resource;
c373b0a4 3096 *p++ = cpu_to_be32(0);
1da177e4
LT		 3097 }
3098 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 3099 p = xdr_reserve_space(xdr, 4);
3100 if (!p)
1da177e4 3101 goto out_resource;
c373b0a4 3102 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 3103 }
3104 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 3105 p = xdr_reserve_space(xdr, 4);
3106 if (!p)
1da177e4 3107 goto out_resource;
c373b0a4 3108 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 3109 }
3110 if (bmval0 & FATTR4_WORD0_ACL) {
3111 struct nfs4_ace *ace;
1da177e4
LT		 3112
3113 if (acl == NULL) {
ddd1ea56
BF		 3114 p = xdr_reserve_space(xdr, 4);
3115 if (!p)
1da177e4
LT		 3116 goto out_resource;
3117
c373b0a4 3118 *p++ = cpu_to_be32(0);
1da177e4
LT		 3119 goto out_acl;
3120 }
ddd1ea56
BF		 3121 p = xdr_reserve_space(xdr, 4);
3122 if (!p)
1da177e4 3123 goto out_resource;
c373b0a4 3124 *p++ = cpu_to_be32(acl->naces);
1da177e4 3125
28e05dd8 3126 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 3127 p = xdr_reserve_space(xdr, 4*3);
3128 if (!p)
1da177e4 3129 goto out_resource;
c373b0a4
BF		 3130 *p++ = cpu_to_be32(ace->type);
3131 *p++ = cpu_to_be32(ace->flag);
3132 *p++ = cpu_to_be32(ace->access_mask &
3133 NFS4_ACE_MASK_ALL);
ddd1ea56 3134 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 3135 if (status)
3136 goto out;
3137 }
3138 }
3139out_acl:
3140 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 3141 p = xdr_reserve_space(xdr, 4);
3142 if (!p)
1da177e4 3143 goto out_resource;
0c9d65e7 3144 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
1da177e4
LT		 3145 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
3146 }
3147 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 3148 p = xdr_reserve_space(xdr, 4);
3149 if (!p)
1da177e4 3150 goto out_resource;
c373b0a4 3151 *p++ = cpu_to_be32(1);
1da177e4
LT		 3152 }
3153 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 3154 p = xdr_reserve_space(xdr, 4);
3155 if (!p)
1da177e4 3156 goto out_resource;
c373b0a4 3157 *p++ = cpu_to_be32(0);
1da177e4
LT		 3158 }
3159 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 3160 p = xdr_reserve_space(xdr, 4);
3161 if (!p)
1da177e4 3162 goto out_resource;
c373b0a4 3163 *p++ = cpu_to_be32(1);
1da177e4
LT		 3164 }
3165 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 3166 p = xdr_reserve_space(xdr, 4);
3167 if (!p)
1da177e4 3168 goto out_resource;
c373b0a4 3169 *p++ = cpu_to_be32(1);
1da177e4
LT		 3170 }
3171 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 3172 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
3173 if (!p)
1da177e4 3174 goto out_resource;
0c0c267b
BF		 3175 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
3176 fhp->fh_handle.fh_size);
1da177e4
LT		 3177 }
3178 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 3179 p = xdr_reserve_space(xdr, 8);
3180 if (!p)
1da177e4 3181 goto out_resource;
b64c7f3b 3182 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 3183 }
3184 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 3185 p = xdr_reserve_space(xdr, 8);
3186 if (!p)
1da177e4 3187 goto out_resource;
b64c7f3b 3188 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 3189 }
3190 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 3191 p = xdr_reserve_space(xdr, 8);
3192 if (!p)
1da177e4 3193 goto out_resource;
b64c7f3b 3194 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 3195 }
3196 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 3197 p = xdr_reserve_space(xdr, 8);
3198 if (!p)
1da177e4 3199 goto out_resource;
b64c7f3b 3200 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 3201 }
81c3f413 3202 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 3203 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 3204 if (status)
3205 goto out;
3206 }
1da177e4 3207 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 3208 p = xdr_reserve_space(xdr, 4);
3209 if (!p)
1da177e4 3210 goto out_resource;
c373b0a4 3211 *p++ = cpu_to_be32(1);
1da177e4
LT		 3212 }
3213 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 3214 p = xdr_reserve_space(xdr, 8);
3215 if (!p)
1da177e4 3216 goto out_resource;
b64c7f3b 3217 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 3218 }
3219 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 3220 p = xdr_reserve_space(xdr, 4);
3221 if (!p)
1da177e4 3222 goto out_resource;
c373b0a4 3223 *p++ = cpu_to_be32(255);
1da177e4
LT		 3224 }
3225 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 3226 p = xdr_reserve_space(xdr, 4);
3227 if (!p)
1da177e4 3228 goto out_resource;
c373b0a4 3229 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 3230 }
3231 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 3232 p = xdr_reserve_space(xdr, 8);
3233 if (!p)
1da177e4 3234 goto out_resource;
b64c7f3b 3235 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 3236 }
3237 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 3238 p = xdr_reserve_space(xdr, 8);
3239 if (!p)
1da177e4 3240 goto out_resource;
b64c7f3b 3241 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 3242 }
3243 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 3244 p = xdr_reserve_space(xdr, 4);
3245 if (!p)
1da177e4 3246 goto out_resource;
c373b0a4 3247 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 3248 }
3249 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 3250 p = xdr_reserve_space(xdr, 4);
3251 if (!p)
1da177e4 3252 goto out_resource;
c373b0a4 3253 *p++ = cpu_to_be32(1);
1da177e4
LT		 3254 }
3255 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 3256 p = xdr_reserve_space(xdr, 4);
3257 if (!p)
1da177e4 3258 goto out_resource;
c373b0a4 3259 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 3260 }
3261 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 3262 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 3263 if (status)
3264 goto out;
3265 }
3266 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 3267 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 3268 if (status)
3269 goto out;
3270 }
3271 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 3272 p = xdr_reserve_space(xdr, 8);
3273 if (!p)
1da177e4 3274 goto out_resource;
c373b0a4
BF		 3275 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
3276 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 3277 }
3278 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 3279 p = xdr_reserve_space(xdr, 8);
3280 if (!p)
1da177e4
LT		 3281 goto out_resource;
3282 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 3283 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3284 }
3285 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 3286 p = xdr_reserve_space(xdr, 8);
3287 if (!p)
1da177e4
LT		 3288 goto out_resource;
3289 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 3290 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3291 }
3292 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 3293 p = xdr_reserve_space(xdr, 8);
3294 if (!p)
1da177e4
LT		 3295 goto out_resource;
3296 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 3297 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3298 }
3299 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 3300 p = xdr_reserve_space(xdr, 8);
3301 if (!p)
1da177e4
LT		 3302 goto out_resource;
3303 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 3304 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3305 }
3306 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 3307 p = xdr_reserve_space(xdr, 12);
3308 if (!p)
1da177e4 3309 goto out_resource;
b64c7f3b 3310 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 3311 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 3312 }
3313 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 3314 p = xdr_reserve_space(xdr, 12);
3315 if (!p)
1da177e4 3316 goto out_resource;
16945141 3317 p = encode_time_delta(p, d_inode(dentry));
1da177e4
LT		 3318 }
3319 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 3320 p = xdr_reserve_space(xdr, 12);
3321 if (!p)
1da177e4 3322 goto out_resource;
b64c7f3b 3323 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 3324 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 3325 }
3326 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 3327 p = xdr_reserve_space(xdr, 12);
3328 if (!p)
1da177e4 3329 goto out_resource;
b64c7f3b 3330 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 3331 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 3332 }
3333 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
0a2050d7
KM		 3334 struct kstat parent_stat;
3335 u64 ino = stat.ino;
3336
ddd1ea56
BF		 3337 p = xdr_reserve_space(xdr, 8);
3338 if (!p)
1da177e4 3339 goto out_resource;
406a7ea9
FF		 3340 /*
3341 * Get parent's attributes if not ignoring crossmount
3342 * and this is the root of a cross-mounted filesystem.
3343 */
3344 if (ignore_crossmnt == 0 &&
0a2050d7
KM		 3345 dentry == exp->ex_path.mnt->mnt_root) {
3346 err = get_parent_attributes(exp, &parent_stat);
3347 if (err)
3348 goto out_nfserr;
3349 ino = parent_stat.ino;
3350 }
3351 p = xdr_encode_hyper(p, ino);
1da177e4 3352 }
9cf514cc 3353#ifdef CONFIG_NFSD_PNFS
6896f15a 3354 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
8a4c3926 3355 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 3356 if (status)
3357 goto out;
3358 }
3359
3360 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
8a4c3926 3361 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 3362 if (status)
3363 goto out;
9cf514cc
CH		 3364 }
3365
3366 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
3367 p = xdr_reserve_space(xdr, 4);
3368 if (!p)
3369 goto out_resource;
3370 *p++ = cpu_to_be32(stat.blksize);
3371 }
3372#endif /* CONFIG_NFSD_PNFS */
8c18f205 3373 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
b26b78cb
TM		 3374 u32 supp[3];
3375
3376 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
3377 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
3378 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
3379 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
3380
3381 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
75976de6
KM		 3382 if (status)
3383 goto out;
8c18f205 3384 }
7e705706 3385
a8585763
BF		 3386 if (bmval2 & FATTR4_WORD2_CHANGE_ATTR_TYPE) {
3387 p = xdr_reserve_space(xdr, 4);
3388 if (!p)
3389 goto out_resource;
3390 if (IS_I_VERSION(d_inode(dentry)))
3391 *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR);
3392 else
3393 *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_TIME_METADATA);
3394 }
3395
0ab88ca4 3396#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
7d580722
KM		 3397 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
3398 status = nfsd4_encode_security_label(xdr, rqstp, context,
3399 contextlen);
3400 if (status)
3401 goto out;
3402 }
0ab88ca4 3403#endif
7d580722 3404
0e885e84
FL		 3405 if (bmval2 & FATTR4_WORD2_XATTR_SUPPORT) {
3406 p = xdr_reserve_space(xdr, 4);
3407 if (!p)
3408 goto out_resource;
3409 err = xattr_supported_namespace(d_inode(dentry),
3410 XATTR_USER_PREFIX);
3411 *p++ = cpu_to_be32(err == 0);
3412 }
3413
082d4bd7
BF		 3414 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
3415 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 3416 status = nfs_ok;
3417
3418out:
ba4e55bb 3419#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 3420 if (context)
3421 security_release_secctx(context, contextlen);
ba4e55bb 3422#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 3423 kfree(acl);
18df11d0 3424 if (tempfh) {
d50e6136 3425 fh_put(tempfh);
18df11d0
YZ		 3426 kfree(tempfh);
3427 }
1fcea5b2
BF		 3428 if (status)
3429 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3430 return status;
3431out_nfserr:
b8dd7b9a 3432 status = nfserrno(err);
1da177e4
LT		 3433 goto out;
3434out_resource:
1da177e4
LT		 3435 status = nfserr_resource;
3436 goto out;
1da177e4
LT		 3437}
3438
2825a7f9
BF		 3439static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
3440 struct xdr_buf *buf, __be32 *p, int bytes)
3441{
3442 xdr->scratch.iov_len = 0;
3443 memset(buf, 0, sizeof(struct xdr_buf));
3444 buf->head[0].iov_base = p;
3445 buf->head[0].iov_len = 0;
3446 buf->len = 0;
3447 xdr->buf = buf;
3448 xdr->iov = buf->head;
3449 xdr->p = p;
3450 xdr->end = (void *)p + bytes;
3451 buf->buflen = bytes;
3452}
3453
d5184658
BF		 3454__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
3455 struct svc_fh *fhp, struct svc_export *exp,
3456 struct dentry *dentry, u32 *bmval,
3457 struct svc_rqst *rqstp, int ignore_crossmnt)
3458{
2825a7f9 3459 struct xdr_buf dummy;
d5184658
BF		 3460 struct xdr_stream xdr;
3461 __be32 ret;
3462
2825a7f9 3463 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 3464 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
3465 ignore_crossmnt);
3466 *p = xdr.p;
3467 return ret;
3468}
3469
c0ce6ec8
BF		 3470static inline int attributes_need_mount(u32 *bmval)
3471{
3472 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
3473 return 1;
3474 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
3475 return 1;
3476 return 0;
3477}
3478
b37ad28b 3479static __be32
561f0ed4
BF		 3480nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
3481 const char *name, int namlen)
1da177e4
LT		 3482{
3483 struct svc_export *exp = cd->rd_fhp->fh_export;
3484 struct dentry *dentry;
b37ad28b 3485 __be32 nfserr;
406a7ea9 3486 int ignore_crossmnt = 0;
1da177e4 3487
6c2d4798 3488 dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
1da177e4
LT		 3489 if (IS_ERR(dentry))
3490 return nfserrno(PTR_ERR(dentry));
3491
3492 exp_get(exp);
406a7ea9
FF		 3493 /*
3494 * In the case of a mountpoint, the client may be asking for
3495 * attributes that are only properties of the underlying filesystem
3496 * as opposed to the cross-mounted file system. In such a case,
3497 * we will not follow the cross mount and will fill the attribtutes
3498 * directly from the mountpoint dentry.
3499 */
3227fa41 3500 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 3501 int err;
3502
3227fa41
BF		 3503 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3504 && !attributes_need_mount(cd->rd_bmval)) {
3505 ignore_crossmnt = 1;
3506 goto out_encode;
3507 }
dcb488a3
AA		 3508 /*
3509 * Why the heck aren't we just using nfsd_lookup??
3510 * Different "."/".." handling? Something else?
3511 * At least, add a comment here to explain....
3512 */
021d3a72
BF		 3513 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3514 if (err) {
3515 nfserr = nfserrno(err);
1da177e4
LT		 3516 goto out_put;
3517 }
dcb488a3
AA		 3518 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3519 if (nfserr)
3520 goto out_put;
1da177e4
LT		 3521
3522 }
3227fa41 3523out_encode:
561f0ed4 3524 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 3525 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 3526out_put:
3527 dput(dentry);
3528 exp_put(exp);
3529 return nfserr;
3530}
3531
2ebbc012 3532static __be32 *
561f0ed4 3533nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 3534{
561f0ed4
BF		 3535 __be32 *p;
3536
c3a45617 3537 p = xdr_reserve_space(xdr, 20);
561f0ed4 3538 if (!p)
1da177e4
LT		 3539 return NULL;
3540 *p++ = htonl(2);
3541 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
3542 *p++ = htonl(0); /* bmval1 */
3543
87915c64 3544 *p++ = htonl(4); /* attribute length */
1da177e4 3545 *p++ = nfserr; /* no htonl */
1da177e4
LT		 3546 return p;
3547}
3548
3549static int
a0ad13ef
N		 3550nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3551 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 3552{
a0ad13ef 3553 struct readdir_cd *ccd = ccdv;
1da177e4 3554 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 3555 struct xdr_stream *xdr = cd->xdr;
3556 int start_offset = xdr->buf->len;
3557 int cookie_offset;
aee37764 3558 u32 name_and_cookie;
561f0ed4 3559 int entry_bytes;
b37ad28b 3560 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 3561 __be64 wire_offset;
3562 __be32 *p;
1da177e4
LT		 3563
3564 /* In nfsv4, "." and ".." never make it onto the wire.. */
3565 if (name && isdotent(name, namlen)) {
3566 cd->common.err = nfs_ok;
3567 return 0;
3568 }
3569
561f0ed4
BF		 3570 if (cd->cookie_offset) {
3571 wire_offset = cpu_to_be64(offset);
3572 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3573 &wire_offset, 8);
3574 }
1da177e4 3575
561f0ed4
BF		 3576 p = xdr_reserve_space(xdr, 4);
3577 if (!p)
1da177e4 3578 goto fail;
1da177e4 3579 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 3580 cookie_offset = xdr->buf->len;
3581 p = xdr_reserve_space(xdr, 3*4 + namlen);
3582 if (!p)
3583 goto fail;
1da177e4
LT		 3584 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
3585 p = xdr_encode_array(p, name, namlen); /* name length & name */
3586
561f0ed4 3587 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 3588 switch (nfserr) {
3589 case nfs_ok:
1da177e4
LT		 3590 break;
3591 case nfserr_resource:
3592 nfserr = nfserr_toosmall;
3593 goto fail;
b2c0cea6 3594 case nfserr_noent:
f41c5ad2 3595 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 3596 goto skip_entry;
1da177e4
LT		 3597 default:
3598 /*
3599 * If the client requested the RDATTR_ERROR attribute,
3600 * we stuff the error code into this attribute
3601 * and continue. If this attribute was not requested,
3602 * then in accordance with the spec, we fail the
3603 * entire READDIR operation(!)
3604 */
3605 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3606 goto fail;
561f0ed4 3607 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 3608 if (p == NULL) {
3609 nfserr = nfserr_toosmall;
1da177e4 3610 goto fail;
34081efc 3611 }
1da177e4 3612 }
561f0ed4
BF		 3613 nfserr = nfserr_toosmall;
3614 entry_bytes = xdr->buf->len - start_offset;
3615 if (entry_bytes > cd->rd_maxcount)
3616 goto fail;
3617 cd->rd_maxcount -= entry_bytes;
aee37764
BF		 3618 /*
3619 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3620 * let's always let through the first entry, at least:
3621 */
0ec016e3
BF		 3622 if (!cd->rd_dircount)
3623 goto fail;
3624 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
aee37764
BF		 3625 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3626 goto fail;
3627 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
0ec016e3 3628
561f0ed4 3629 cd->cookie_offset = cookie_offset;
b2c0cea6 3630skip_entry:
1da177e4
LT		 3631 cd->common.err = nfs_ok;
3632 return 0;
3633fail:
561f0ed4 3634 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 3635 cd->common.err = nfserr;
3636 return -EINVAL;
3637}
3638
d0a381dd
BF		 3639static __be32
3640nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 3641{
bc749ca4 3642 __be32 *p;
e2f282b9 3643
d0a381dd
BF		 3644 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3645 if (!p)
3646 return nfserr_resource;
c373b0a4 3647 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 3648 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3649 sizeof(stateid_opaque_t));
d0a381dd 3650 return 0;
e2f282b9
BH		 3651}
3652
695e12f8 3653static __be32
b37ad28b 3654nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 3655{
d0a381dd 3656 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3657 __be32 *p;
1da177e4 3658
bac966d6
BF		 3659 p = xdr_reserve_space(xdr, 8);
3660 if (!p)
3661 return nfserr_resource;
3662 *p++ = cpu_to_be32(access->ac_supported);
3663 *p++ = cpu_to_be32(access->ac_resp_access);
3664 return 0;
1da177e4
LT		 3665}
3666
1d1bc8f2
BF		 3667static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3668{
d0a381dd 3669 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 3670 __be32 *p;
3671
bac966d6
BF		 3672 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3673 if (!p)
3674 return nfserr_resource;
3675 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3676 NFS4_MAX_SESSIONID_LEN);
3677 *p++ = cpu_to_be32(bcts->dir);
3678 /* Upshifting from TCP to RDMA is not supported */
3679 *p++ = cpu_to_be32(0);
3680 return 0;
1d1bc8f2
BF		 3681}
3682
695e12f8 3683static __be32
b37ad28b 3684nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 3685{
d0a381dd
BF		 3686 struct xdr_stream *xdr = &resp->xdr;
3687
bac966d6 3688 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
1da177e4
LT		 3689}
3690
3691
695e12f8 3692static __be32
b37ad28b 3693nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 3694{
d0a381dd 3695 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3696 __be32 *p;
1da177e4 3697
bac966d6
BF		 3698 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3699 if (!p)
3700 return nfserr_resource;
3701 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
0c0c267b 3702 NFS4_VERIFIER_SIZE);
bac966d6 3703 return 0;
1da177e4
LT		 3704}
3705
695e12f8 3706static __be32
b37ad28b 3707nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 3708{
d0a381dd 3709 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3710 __be32 *p;
1da177e4 3711
bac966d6
BF		 3712 p = xdr_reserve_space(xdr, 20);
3713 if (!p)
3714 return nfserr_resource;
3715 encode_cinfo(p, &create->cr_cinfo);
b96811cd 3716 return nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
bac966d6 3717 create->cr_bmval[1], create->cr_bmval[2]);
1da177e4
LT		 3718}
3719
b37ad28b
AV		 3720static __be32
3721nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 3722{
3723 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 3724 struct xdr_stream *xdr = &resp->xdr;
1da177e4 3725
bac966d6
BF		 3726 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3727 getattr->ga_bmval, resp->rqstp, 0);
1da177e4
LT		 3728}
3729
695e12f8
BH		 3730static __be32
3731nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 3732{
d0a381dd 3733 struct xdr_stream *xdr = &resp->xdr;
695e12f8 3734 struct svc_fh *fhp = *fhpp;
1da177e4 3735 unsigned int len;
bc749ca4 3736 __be32 *p;
1da177e4 3737
bac966d6
BF		 3738 len = fhp->fh_handle.fh_size;
3739 p = xdr_reserve_space(xdr, len + 4);
3740 if (!p)
3741 return nfserr_resource;
3742 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3743 return 0;
1da177e4
LT		 3744}
3745
3746/*
3747* Including all fields other than the name, a LOCK4denied structure requires
3748* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3749*/
d0a381dd
BF		 3750static __be32
3751nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 3752{
7c13f344 3753 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 3754 __be32 *p;
1da177e4 3755
8c7424cf 3756again:
d0a381dd 3757 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 3758 if (!p) {
3759 /*
3760 * Don't fail to return the result just because we can't
3761 * return the conflicting open:
3762 */
3763 if (conf->len) {
f98bac5a 3764 kfree(conf->data);
8c7424cf
BF		 3765 conf->len = 0;
3766 conf->data = NULL;
3767 goto again;
3768 }
d0a381dd 3769 return nfserr_resource;
8c7424cf 3770 }
b64c7f3b
BF		 3771 p = xdr_encode_hyper(p, ld->ld_start);
3772 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 3773 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 3774 if (conf->len) {
0c0c267b
BF		 3775 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3776 p = xdr_encode_opaque(p, conf->data, conf->len);
f98bac5a 3777 kfree(conf->data);
1da177e4 3778 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 3779 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 3780 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 3781 }
d0a381dd 3782 return nfserr_denied;
1da177e4
LT		 3783}
3784
695e12f8 3785static __be32
b37ad28b 3786nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 3787{
d0a381dd
BF		 3788 struct xdr_stream *xdr = &resp->xdr;
3789
e2f282b9 3790 if (!nfserr)
d0a381dd 3791 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 3792 else if (nfserr == nfserr_denied)
d0a381dd 3793 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
f98bac5a 3794
695e12f8 3795 return nfserr;
1da177e4
LT		 3796}
3797
695e12f8 3798static __be32
b37ad28b 3799nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 3800{
d0a381dd
BF		 3801 struct xdr_stream *xdr = &resp->xdr;
3802
1da177e4 3803 if (nfserr == nfserr_denied)
d0a381dd 3804 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 3805 return nfserr;
1da177e4
LT		 3806}
3807
695e12f8 3808static __be32
b37ad28b 3809nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 3810{
d0a381dd
BF		 3811 struct xdr_stream *xdr = &resp->xdr;
3812
bac966d6 3813 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
1da177e4
LT		 3814}
3815
3816
695e12f8 3817static __be32
b37ad28b 3818nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 3819{
d0a381dd 3820 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3821 __be32 *p;
1da177e4 3822
bac966d6
BF		 3823 p = xdr_reserve_space(xdr, 20);
3824 if (!p)
3825 return nfserr_resource;
3826 p = encode_cinfo(p, &link->li_cinfo);
3827 return 0;
1da177e4
LT		 3828}
3829
3830
695e12f8 3831static __be32
b37ad28b 3832nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 3833{
d0a381dd 3834 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3835 __be32 *p;
1da177e4 3836
d0a381dd
BF		 3837 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3838 if (nfserr)
bac966d6 3839 return nfserr;
75976de6 3840 p = xdr_reserve_space(xdr, 24);
d0a381dd
BF		 3841 if (!p)
3842 return nfserr_resource;
d05d5744 3843 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4 3844 *p++ = cpu_to_be32(open->op_rflags);
1da177e4 3845
75976de6
KM		 3846 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3847 open->op_bmval[2]);
3848 if (nfserr)
bac966d6 3849 return nfserr;
75976de6
KM		 3850
3851 p = xdr_reserve_space(xdr, 4);
3852 if (!p)
3853 return nfserr_resource;
3854
3855 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 3856 switch (open->op_delegate_type) {
3857 case NFS4_OPEN_DELEGATE_NONE:
3858 break;
3859 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 3860 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3861 if (nfserr)
3862 return nfserr;
3863 p = xdr_reserve_space(xdr, 20);
3864 if (!p)
3865 return nfserr_resource;
c373b0a4 3866 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 3867
3868 /*
3869 * TODO: ACE's in delegations
3870 */
c373b0a4
BF		 3871 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3872 *p++ = cpu_to_be32(0);
3873 *p++ = cpu_to_be32(0);
3874 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 3875 break;
3876 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 3877 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3878 if (nfserr)
3879 return nfserr;
3880 p = xdr_reserve_space(xdr, 32);
3881 if (!p)
3882 return nfserr_resource;
c373b0a4 3883 *p++ = cpu_to_be32(0);
1da177e4
LT		 3884
3885 /*
3886 * TODO: space_limit's in delegations
3887 */
c373b0a4
BF		 3888 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3889 *p++ = cpu_to_be32(~(u32)0);
3890 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3891
3892 /*
3893 * TODO: ACE's in delegations
3894 */
c373b0a4
BF		 3895 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3896 *p++ = cpu_to_be32(0);
3897 *p++ = cpu_to_be32(0);
3898 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3899 break;
d24433cd
BH		 3900 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3901 switch (open->op_why_no_deleg) {
3902 case WND4_CONTENTION:
3903 case WND4_RESOURCE:
d0a381dd
BF		 3904 p = xdr_reserve_space(xdr, 8);
3905 if (!p)
3906 return nfserr_resource;
c373b0a4
BF		 3907 *p++ = cpu_to_be32(open->op_why_no_deleg);
3908 /* deleg signaling not supported yet: */
3909 *p++ = cpu_to_be32(0);
d24433cd
BH		 3910 break;
3911 default:
d0a381dd
BF		 3912 p = xdr_reserve_space(xdr, 4);
3913 if (!p)
3914 return nfserr_resource;
c373b0a4 3915 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3916 }
d24433cd 3917 break;
1da177e4
LT		 3918 default:
3919 BUG();
3920 }
3921 /* XXX save filehandle here */
bac966d6 3922 return 0;
1da177e4
LT		 3923}
3924
695e12f8 3925static __be32
b37ad28b 3926nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3927{
d0a381dd
BF		 3928 struct xdr_stream *xdr = &resp->xdr;
3929
bac966d6 3930 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4
LT		 3931}
3932
695e12f8 3933static __be32
b37ad28b 3934nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3935{
d0a381dd
BF		 3936 struct xdr_stream *xdr = &resp->xdr;
3937
bac966d6 3938 return nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4
LT		 3939}
3940
dc97618d
BF		 3941static __be32 nfsd4_encode_splice_read(
3942 struct nfsd4_compoundres *resp,
3943 struct nfsd4_read *read,
3944 struct file *file, unsigned long maxcount)
1da177e4 3945{
ddd1ea56 3946 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3947 struct xdr_buf *buf = xdr->buf;
76e5492b 3948 int status, space_left;
dc97618d 3949 u32 eof;
dc97618d 3950 __be32 nfserr;
fec25fa4 3951 __be32 *p = xdr->p - 2;
1da177e4 3952
d5d5c304
KM		 3953 /* Make sure there will be room for padding if needed */
3954 if (xdr->end - xdr->p < 1)
d0a381dd 3955 return nfserr_resource;
dc97618d 3956
87c5942e 3957 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
83a63072 3958 file, read->rd_offset, &maxcount, &eof);
87c5942e 3959 read->rd_length = maxcount;
76e5492b
CL		 3960 if (nfserr)
3961 goto out_err;
3962 status = svc_encode_result_payload(read->rd_rqstp,
3963 buf->head[0].iov_len, maxcount);
3964 if (status) {
3965 nfserr = nfserrno(status);
3966 goto out_err;
b0e35fda 3967 }
1da177e4 3968
fec25fa4
BF		 3969 *(p++) = htonl(eof);
3970 *(p++) = htonl(maxcount);
dc97618d 3971
34a78b48
BF		 3972 buf->page_len = maxcount;
3973 buf->len += maxcount;
15b23ef5
BF		 3974 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3975 / PAGE_SIZE;
dc97618d
BF		 3976
3977 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3978 buf->tail[0].iov_base = xdr->p;
3979 buf->tail[0].iov_len = 0;
fec25fa4 3980 xdr->iov = buf->tail;
dc97618d 3981 if (maxcount&3) {
fec25fa4
BF		 3982 int pad = 4 - (maxcount&3);
3983
3984 *(xdr->p++) = 0;
3985
34a78b48 3986 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3987 buf->tail[0].iov_len = pad;
3988 buf->len += pad;
b0e35fda 3989 }
2825a7f9 3990
dc97618d 3991 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3992 buf->buflen - buf->len);
3993 buf->buflen = buf->len + space_left;
dc97618d
BF		 3994 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3995
3996 return 0;
76e5492b
CL		 3997
3998out_err:
3999 /*
4000 * nfsd_splice_actor may have already messed with the
4001 * page length; reset it so as not to confuse
4002 * xdr_truncate_encode in our caller.
4003 */
4004 buf->page_len = 0;
4005 return nfserr;
dc97618d
BF		 4006}
4007
4008static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
4009 struct nfsd4_read *read,
4010 struct file *file, unsigned long maxcount)
4011{
4012 struct xdr_stream *xdr = &resp->xdr;
4013 u32 eof;
dc97618d 4014 int starting_len = xdr->buf->len - 8;
dc97618d
BF		 4015 __be32 nfserr;
4016 __be32 tmp;
b0420980 4017 int pad;
1da177e4 4018
403217f3
AS		 4019 read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, maxcount);
4020 if (read->rd_vlen < 0)
4021 return nfserr_resource;
1da177e4 4022
87c5942e 4023 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
83a63072
TM		 4024 resp->rqstp->rq_vec, read->rd_vlen, &maxcount,
4025 &eof);
87c5942e 4026 read->rd_length = maxcount;
dc97618d 4027 if (nfserr)
1da177e4 4028 return nfserr;
03493bca 4029 if (svc_encode_result_payload(resp->rqstp, starting_len + 8, maxcount))
41205539 4030 return nfserr_io;
7dcf4ab9 4031 xdr_truncate_encode(xdr, starting_len + 8 + xdr_align_size(maxcount));
dc97618d 4032
dc97618d
BF		 4033 tmp = htonl(eof);
4034 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
4035 tmp = htonl(maxcount);
4036 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
4037
7dcf4ab9 4038 tmp = xdr_zero;
b0420980
BF		 4039 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
4040 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
7dcf4ab9 4041 &tmp, pad);
1da177e4 4042 return 0;
dc97618d
BF		 4043
4044}
4045
4046static __be32
4047nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
4048 struct nfsd4_read *read)
4049{
4050 unsigned long maxcount;
4051 struct xdr_stream *xdr = &resp->xdr;
5c4583b2 4052 struct file *file;
dc97618d 4053 int starting_len = xdr->buf->len;
dc97618d 4054 __be32 *p;
dc97618d 4055
5c4583b2
JL		 4056 if (nfserr)
4057 return nfserr;
4058 file = read->rd_nf->nf_file;
4059
dc97618d
BF		 4060 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
4061 if (!p) {
779fb0f3 4062 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
bac966d6 4063 return nfserr_resource;
dc97618d 4064 }
68e8bb03
CH		 4065 if (resp->xdr.buf->page_len &&
4066 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
b0420980 4067 WARN_ON_ONCE(1);
bac966d6 4068 return nfserr_resource;
dc97618d 4069 }
dc97618d
BF		 4070 xdr_commit_encode(xdr);
4071
4072 maxcount = svc_max_payload(resp->rqstp);
68e8bb03
CH		 4073 maxcount = min_t(unsigned long, maxcount,
4074 (xdr->buf->buflen - xdr->buf->len));
3c7aa15d 4075 maxcount = min_t(unsigned long, maxcount, read->rd_length);
dc97618d 4076
68e8bb03
CH		 4077 if (file->f_op->splice_read &&
4078 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
96bcad50 4079 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
dc97618d 4080 else
96bcad50 4081 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
dc97618d 4082
96bcad50 4083 if (nfserr)
dc97618d 4084 xdr_truncate_encode(xdr, starting_len);
96bcad50 4085
96bcad50 4086 return nfserr;
1da177e4
LT		 4087}
4088
b37ad28b
AV		 4089static __be32
4090nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 4091{
4092 int maxcount;
476a7b1f
BF		 4093 __be32 wire_count;
4094 int zero = 0;
ddd1ea56 4095 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 4096 int length_offset = xdr->buf->len;
76e5492b 4097 int status;
bc749ca4 4098 __be32 *p;
1da177e4 4099
2825a7f9
BF		 4100 p = xdr_reserve_space(xdr, 4);
4101 if (!p)
4102 return nfserr_resource;
1da177e4 4103 maxcount = PAGE_SIZE;
d0a381dd 4104
476a7b1f
BF		 4105 p = xdr_reserve_space(xdr, maxcount);
4106 if (!p)
4e21ac4b 4107 return nfserr_resource;
1da177e4 4108 /*
fd4a0edf
MS		 4109 * XXX: By default, vfs_readlink() will truncate symlinks if they
4110 * would overflow the buffer. Is this kosher in NFSv4? If not, one
4111 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
4112 * that truncation occurred, and return NFS4ERR_RESOURCE.
1da177e4 4113 */
476a7b1f
BF		 4114 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
4115 (char *)p, &maxcount);
1da177e4 4116 if (nfserr == nfserr_isdir)
d3f627c8 4117 nfserr = nfserr_inval;
76e5492b
CL		 4118 if (nfserr)
4119 goto out_err;
4120 status = svc_encode_result_payload(readlink->rl_rqstp, length_offset,
4121 maxcount);
4122 if (status) {
4123 nfserr = nfserrno(status);
4124 goto out_err;
d3f627c8 4125 }
1da177e4 4126
476a7b1f
BF		 4127 wire_count = htonl(maxcount);
4128 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
69bbd9c7 4129 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
476a7b1f
BF		 4130 if (maxcount & 3)
4131 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
4132 &zero, 4 - (maxcount&3));
1da177e4 4133 return 0;
76e5492b
CL		 4134
4135out_err:
4136 xdr_truncate_encode(xdr, length_offset);
4137 return nfserr;
1da177e4
LT		 4138}
4139
b37ad28b
AV		 4140static __be32
4141nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 4142{
4143 int maxcount;
561f0ed4 4144 int bytes_left;
1da177e4 4145 loff_t offset;
561f0ed4 4146 __be64 wire_offset;
ddd1ea56 4147 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 4148 int starting_len = xdr->buf->len;
bc749ca4 4149 __be32 *p;
1da177e4 4150
d0a381dd
BF		 4151 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
4152 if (!p)
4153 return nfserr_resource;
1da177e4
LT		 4154
4155 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 4156 *p++ = cpu_to_be32(0);
4157 *p++ = cpu_to_be32(0);
4aea24b2
BF		 4158 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
4159 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 4160
4161 /*
561f0ed4
BF		 4162 * Number of bytes left for directory entries allowing for the
4163 * final 8 bytes of the readdir and a following failed op:
4164 */
4165 bytes_left = xdr->buf->buflen - xdr->buf->len
4166 - COMPOUND_ERR_SLACK_SPACE - 8;
4167 if (bytes_left < 0) {
4168 nfserr = nfserr_resource;
4169 goto err_no_verf;
4170 }
9c2ece6e
SM		 4171 maxcount = svc_max_payload(resp->rqstp);
4172 maxcount = min_t(u32, readdir->rd_maxcount, maxcount);
561f0ed4
BF		 4173 /*
4174 * Note the rfc defines rd_maxcount as the size of the
4175 * READDIR4resok structure, which includes the verifier above
4176 * and the 8 bytes encoded at the end of this function:
1da177e4 4177 */
561f0ed4
BF		 4178 if (maxcount < 16) {
4179 nfserr = nfserr_toosmall;
1da177e4
LT		 4180 goto err_no_verf;
4181 }
561f0ed4 4182 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 4183
aee37764
BF		 4184 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
4185 if (!readdir->rd_dircount)
9c2ece6e 4186 readdir->rd_dircount = svc_max_payload(resp->rqstp);
aee37764 4187
561f0ed4
BF		 4188 readdir->xdr = xdr;
4189 readdir->rd_maxcount = maxcount;
1da177e4 4190 readdir->common.err = 0;
561f0ed4 4191 readdir->cookie_offset = 0;
1da177e4
LT		 4192
4193 offset = readdir->rd_cookie;
4194 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
4195 &offset,
4196 &readdir->common, nfsd4_encode_dirent);
4197 if (nfserr == nfs_ok &&
4198 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 4199 xdr->buf->len == starting_len + 8) {
4200 /* nothing encoded; which limit did we hit?: */
4201 if (maxcount - 16 < bytes_left)
4202 /* It was the fault of rd_maxcount: */
4203 nfserr = nfserr_toosmall;
4204 else
4205 /* We ran out of buffer space: */
4206 nfserr = nfserr_resource;
4207 }
1da177e4
LT		 4208 if (nfserr)
4209 goto err_no_verf;
4210
561f0ed4
BF		 4211 if (readdir->cookie_offset) {
4212 wire_offset = cpu_to_be64(offset);
4213 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
4214 &wire_offset, 8);
4215 }
1da177e4 4216
561f0ed4
BF		 4217 p = xdr_reserve_space(xdr, 8);
4218 if (!p) {
4219 WARN_ON_ONCE(1);
4220 goto err_no_verf;
4221 }
1da177e4
LT		 4222 *p++ = 0; /* no more entries */
4223 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 4224
4225 return 0;
4226err_no_verf:
1fcea5b2 4227 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 4228 return nfserr;
4229}
4230
695e12f8 4231static __be32
b37ad28b 4232nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 4233{
d0a381dd 4234 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4235 __be32 *p;
1da177e4 4236
bac966d6
BF		 4237 p = xdr_reserve_space(xdr, 20);
4238 if (!p)
4239 return nfserr_resource;
4240 p = encode_cinfo(p, &remove->rm_cinfo);
4241 return 0;
1da177e4
LT		 4242}
4243
695e12f8 4244static __be32
b37ad28b 4245nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 4246{
d0a381dd 4247 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4248 __be32 *p;
1da177e4 4249
bac966d6
BF		 4250 p = xdr_reserve_space(xdr, 40);
4251 if (!p)
4252 return nfserr_resource;
4253 p = encode_cinfo(p, &rename->rn_sinfo);
4254 p = encode_cinfo(p, &rename->rn_tinfo);
4255 return 0;
1da177e4
LT		 4256}
4257
695e12f8 4258static __be32
bac966d6 4259nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
dcb488a3 4260{
676e4ebd 4261 u32 i, nflavs, supported;
4796f457
BF		 4262 struct exp_flavor_info *flavs;
4263 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 4264 __be32 *p, *flavorsp;
4265 static bool report = true;
dcb488a3 4266
4796f457
BF		 4267 if (exp->ex_nflavors) {
4268 flavs = exp->ex_flavors;
4269 nflavs = exp->ex_nflavors;
4270 } else { /* Handling of some defaults in absence of real secinfo: */
4271 flavs = def_flavs;
4272 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
4273 nflavs = 2;
4274 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
4275 flavs[1].pseudoflavor = RPC_AUTH_NULL;
4276 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
4277 nflavs = 1;
4278 flavs[0].pseudoflavor
4279 = svcauth_gss_flavor(exp->ex_client);
4280 } else {
4281 nflavs = 1;
4282 flavs[0].pseudoflavor
4283 = exp->ex_client->flavour->flavour;
4284 }
4285 }
4286
676e4ebd 4287 supported = 0;
d0a381dd
BF		 4288 p = xdr_reserve_space(xdr, 4);
4289 if (!p)
bac966d6 4290 return nfserr_resource;
676e4ebd 4291 flavorsp = p++; /* to be backfilled later */
676e4ebd 4292
4796f457 4293 for (i = 0; i < nflavs; i++) {
676e4ebd 4294 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 4295 struct rpcsec_gss_info info;
dcb488a3 4296
676e4ebd
CL		 4297 if (rpcauth_get_gssinfo(pf, &info) == 0) {
4298 supported++;
d0a381dd
BF		 4299 p = xdr_reserve_space(xdr, 4 + 4 +
4300 XDR_LEN(info.oid.len) + 4 + 4);
4301 if (!p)
bac966d6 4302 return nfserr_resource;
c373b0a4 4303 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 4304 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 4305 *p++ = cpu_to_be32(info.qop);
4306 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 4307 } else if (pf < RPC_AUTH_MAXFLAVOR) {
4308 supported++;
d0a381dd
BF		 4309 p = xdr_reserve_space(xdr, 4);
4310 if (!p)
bac966d6 4311 return nfserr_resource;
c373b0a4 4312 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 4313 } else {
4314 if (report)
4315 pr_warn("NFS: SECINFO: security flavor %u "
4316 "is not supported\n", pf);
dcb488a3
AA		 4317 }
4318 }
a77c806f 4319
676e4ebd
CL		 4320 if (nflavs != supported)
4321 report = false;
4322 *flavorsp = htonl(supported);
bac966d6 4323 return 0;
dcb488a3
AA		 4324}
4325
22b6dee8
MJ		 4326static __be32
4327nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4328 struct nfsd4_secinfo *secinfo)
4329{
d0a381dd
BF		 4330 struct xdr_stream *xdr = &resp->xdr;
4331
bac966d6 4332 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
22b6dee8
MJ		 4333}
4334
4335static __be32
4336nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
4337 struct nfsd4_secinfo_no_name *secinfo)
4338{
d0a381dd
BF		 4339 struct xdr_stream *xdr = &resp->xdr;
4340
bac966d6 4341 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
22b6dee8
MJ		 4342}
4343
1da177e4
LT		 4344/*
4345 * The SETATTR encode routine is special -- it always encodes a bitmap,
4346 * regardless of the error status.
4347 */
695e12f8 4348static __be32
b37ad28b 4349nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 4350{
d0a381dd 4351 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4352 __be32 *p;
1da177e4 4353
d0a381dd
BF		 4354 p = xdr_reserve_space(xdr, 16);
4355 if (!p)
4356 return nfserr_resource;
1da177e4 4357 if (nfserr) {
c373b0a4
BF		 4358 *p++ = cpu_to_be32(3);
4359 *p++ = cpu_to_be32(0);
4360 *p++ = cpu_to_be32(0);
4361 *p++ = cpu_to_be32(0);
1da177e4
LT		 4362 }
4363 else {
c373b0a4
BF		 4364 *p++ = cpu_to_be32(3);
4365 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
4366 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
4367 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 4368 }
695e12f8 4369 return nfserr;
1da177e4
LT		 4370}
4371
695e12f8 4372static __be32
b37ad28b 4373nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 4374{
d0a381dd 4375 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4376 __be32 *p;
1da177e4
LT		 4377
4378 if (!nfserr) {
d0a381dd
BF		 4379 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
4380 if (!p)
4381 return nfserr_resource;
0c0c267b
BF		 4382 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
4383 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
4384 NFS4_VERIFIER_SIZE);
1da177e4
LT		 4385 }
4386 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 4387 p = xdr_reserve_space(xdr, 8);
4388 if (!p)
4389 return nfserr_resource;
c373b0a4
BF		 4390 *p++ = cpu_to_be32(0);
4391 *p++ = cpu_to_be32(0);
1da177e4 4392 }
695e12f8 4393 return nfserr;
1da177e4
LT		 4394}
4395
695e12f8 4396static __be32
b37ad28b 4397nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 4398{
d0a381dd 4399 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4400 __be32 *p;
1da177e4 4401
bac966d6
BF		 4402 p = xdr_reserve_space(xdr, 16);
4403 if (!p)
4404 return nfserr_resource;
4405 *p++ = cpu_to_be32(write->wr_bytes_written);
4406 *p++ = cpu_to_be32(write->wr_how_written);
4407 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4408 NFS4_VERIFIER_SIZE);
4409 return 0;
1da177e4
LT		 4410}
4411
2db134eb 4412static __be32
57b7b43b 4413nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4414 struct nfsd4_exchange_id *exid)
4415{
d0a381dd 4416 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4417 __be32 *p;
0733d213
AA		 4418 char *major_id;
4419 char *server_scope;
4420 int major_id_sz;
4421 int server_scope_sz;
4422 uint64_t minor_id = 0;
7627d7dc 4423 struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id);
0733d213 4424
7627d7dc
SM		 4425 major_id = nn->nfsd_name;
4426 major_id_sz = strlen(nn->nfsd_name);
4427 server_scope = nn->nfsd_name;
4428 server_scope_sz = strlen(nn->nfsd_name);
0733d213 4429
d0a381dd 4430 p = xdr_reserve_space(xdr,
0733d213
AA		 4431 8 /* eir_clientid */ +
4432 4 /* eir_sequenceid */ +
4433 4 /* eir_flags */ +
a8bb84bc 4434 4 /* spr_how */);
d0a381dd
BF		 4435 if (!p)
4436 return nfserr_resource;
0733d213 4437
0c0c267b 4438 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 4439 *p++ = cpu_to_be32(exid->seqid);
4440 *p++ = cpu_to_be32(exid->flags);
0733d213 4441
c373b0a4 4442 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 4443
57266a6e
BF		 4444 switch (exid->spa_how) {
4445 case SP4_NONE:
4446 break;
4447 case SP4_MACH_CRED:
4448 /* spo_must_enforce bitmap: */
bac966d6 4449 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 4450 exid->spo_must_enforce[0],
4451 exid->spo_must_enforce[1],
4452 exid->spo_must_enforce[2]);
bac966d6
BF		 4453 if (nfserr)
4454 return nfserr;
ed941643 4455 /* spo_must_allow bitmap: */
bac966d6 4456 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 4457 exid->spo_must_allow[0],
4458 exid->spo_must_allow[1],
4459 exid->spo_must_allow[2]);
bac966d6
BF		 4460 if (nfserr)
4461 return nfserr;
57266a6e
BF		 4462 break;
4463 default:
4464 WARN_ON_ONCE(1);
4465 }
0733d213 4466
d0a381dd 4467 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 4468 8 /* so_minor_id */ +
4469 4 /* so_major_id.len */ +
4470 (XDR_QUADLEN(major_id_sz) * 4) +
4471 4 /* eir_server_scope.len */ +
4472 (XDR_QUADLEN(server_scope_sz) * 4) +
4473 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 4474 if (!p)
4475 return nfserr_resource;
a8bb84bc 4476
0733d213 4477 /* The server_owner struct */
b64c7f3b 4478 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 4479 /* major id */
0c0c267b 4480 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 4481
4482 /* Server scope */
0c0c267b 4483 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 4484
4485 /* Implementation id */
c373b0a4 4486 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 4487 return 0;
2db134eb
AA		 4488}
4489
4490static __be32
57b7b43b 4491nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4492 struct nfsd4_create_session *sess)
4493{
d0a381dd 4494 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4495 __be32 *p;
ec6b5d7b 4496
d0a381dd
BF		 4497 p = xdr_reserve_space(xdr, 24);
4498 if (!p)
4499 return nfserr_resource;
0c0c267b
BF		 4500 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4501 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4502 *p++ = cpu_to_be32(sess->seqid);
4503 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 4504
d0a381dd
BF		 4505 p = xdr_reserve_space(xdr, 28);
4506 if (!p)
4507 return nfserr_resource;
c373b0a4
BF		 4508 *p++ = cpu_to_be32(0); /* headerpadsz */
4509 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4510 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4511 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4512 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4513 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4514 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4515
4516 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 4517 p = xdr_reserve_space(xdr, 4);
4518 if (!p)
4519 return nfserr_resource;
c373b0a4 4520 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 4521 }
4522
d0a381dd
BF		 4523 p = xdr_reserve_space(xdr, 28);
4524 if (!p)
4525 return nfserr_resource;
c373b0a4
BF		 4526 *p++ = cpu_to_be32(0); /* headerpadsz */
4527 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4528 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4529 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4530 *p++ = cpu_to_be32(sess->back_channel.maxops);
4531 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4532 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4533
4534 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 4535 p = xdr_reserve_space(xdr, 4);
4536 if (!p)
4537 return nfserr_resource;
c373b0a4 4538 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 4539 }
4540 return 0;
2db134eb
AA		 4541}
4542
c47d832b 4543static __be32
57b7b43b 4544nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4545 struct nfsd4_sequence *seq)
4546{
d0a381dd 4547 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4548 __be32 *p;
b85d4c01 4549
d0a381dd
BF		 4550 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4551 if (!p)
4552 return nfserr_resource;
0c0c267b
BF		 4553 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4554 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4555 *p++ = cpu_to_be32(seq->seqid);
4556 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 4557 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 4558 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4559 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4560 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 4561
f5236013 4562 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 4563 return 0;
2db134eb
AA		 4564}
4565
2355c596 4566static __be32
57b7b43b 4567nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 4568 struct nfsd4_test_stateid *test_stateid)
4569{
d0a381dd 4570 struct xdr_stream *xdr = &resp->xdr;
03cfb420 4571 struct nfsd4_test_stateid_id *stateid, *next;
17456804 4572 __be32 *p;
17456804 4573
d0a381dd
BF		 4574 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4575 if (!p)
4576 return nfserr_resource;
17456804 4577 *p++ = htonl(test_stateid->ts_num_ids);
17456804 4578
03cfb420 4579 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 4580 *p++ = stateid->ts_id_status;
17456804 4581 }
17456804 4582
bac966d6 4583 return 0;
17456804
BS		 4584}
4585
9cf514cc
CH		 4586#ifdef CONFIG_NFSD_PNFS
4587static __be32
4588nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4589 struct nfsd4_getdeviceinfo *gdev)
4590{
4591 struct xdr_stream *xdr = &resp->xdr;
f961e3f2 4592 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4593 u32 starting_len = xdr->buf->len, needed_len;
4594 __be32 *p;
4595
9cf514cc
CH		 4596 p = xdr_reserve_space(xdr, 4);
4597 if (!p)
bac966d6 4598 return nfserr_resource;
9cf514cc
CH		 4599
4600 *p++ = cpu_to_be32(gdev->gd_layout_type);
4601
4602 /* If maxcount is 0 then just update notifications */
4603 if (gdev->gd_maxcount != 0) {
f961e3f2 4604 ops = nfsd4_layout_ops[gdev->gd_layout_type];
9cf514cc
CH		 4605 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4606 if (nfserr) {
4607 /*
4608 * We don't bother to burden the layout drivers with
4609 * enforcing gd_maxcount, just tell the client to
4610 * come back with a bigger buffer if it's not enough.
4611 */
4612 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4613 goto toosmall;
bac966d6 4614 return nfserr;
9cf514cc
CH		 4615 }
4616 }
4617
9cf514cc
CH		 4618 if (gdev->gd_notify_types) {
4619 p = xdr_reserve_space(xdr, 4 + 4);
4620 if (!p)
bac966d6 4621 return nfserr_resource;
9cf514cc
CH		 4622 *p++ = cpu_to_be32(1); /* bitmap length */
4623 *p++ = cpu_to_be32(gdev->gd_notify_types);
4624 } else {
4625 p = xdr_reserve_space(xdr, 4);
4626 if (!p)
bac966d6 4627 return nfserr_resource;
9cf514cc
CH		 4628 *p++ = 0;
4629 }
4630
bac966d6 4631 return 0;
9cf514cc
CH		 4632toosmall:
4633 dprintk("%s: maxcount too small\n", __func__);
4634 needed_len = xdr->buf->len + 4 /* notifications */;
4635 xdr_truncate_encode(xdr, starting_len);
4636 p = xdr_reserve_space(xdr, 4);
bac966d6
BF		 4637 if (!p)
4638 return nfserr_resource;
4639 *p++ = cpu_to_be32(needed_len);
4640 return nfserr_toosmall;
9cf514cc
CH		 4641}
4642
4643static __be32
4644nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4645 struct nfsd4_layoutget *lgp)
4646{
4647 struct xdr_stream *xdr = &resp->xdr;
f961e3f2 4648 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4649 __be32 *p;
4650
9cf514cc
CH		 4651 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4652 if (!p)
bac966d6 4653 return nfserr_resource;
9cf514cc
CH		 4654
4655 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4656 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4657 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4658 sizeof(stateid_opaque_t));
4659
4660 *p++ = cpu_to_be32(1); /* we always return a single layout */
4661 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4662 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4663 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4664 *p++ = cpu_to_be32(lgp->lg_layout_type);
4665
f961e3f2 4666 ops = nfsd4_layout_ops[lgp->lg_layout_type];
bac966d6 4667 return ops->encode_layoutget(xdr, lgp);
9cf514cc
CH		 4668}
4669
4670static __be32
4671nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4672 struct nfsd4_layoutcommit *lcp)
4673{
4674 struct xdr_stream *xdr = &resp->xdr;
4675 __be32 *p;
4676
9cf514cc
CH		 4677 p = xdr_reserve_space(xdr, 4);
4678 if (!p)
4679 return nfserr_resource;
4680 *p++ = cpu_to_be32(lcp->lc_size_chg);
4681 if (lcp->lc_size_chg) {
4682 p = xdr_reserve_space(xdr, 8);
4683 if (!p)
4684 return nfserr_resource;
4685 p = xdr_encode_hyper(p, lcp->lc_newsize);
4686 }
4687
bac966d6 4688 return 0;
9cf514cc
CH		 4689}
4690
4691static __be32
4692nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4693 struct nfsd4_layoutreturn *lrp)
4694{
4695 struct xdr_stream *xdr = &resp->xdr;
4696 __be32 *p;
4697
9cf514cc
CH		 4698 p = xdr_reserve_space(xdr, 4);
4699 if (!p)
4700 return nfserr_resource;
4701 *p++ = cpu_to_be32(lrp->lrs_present);
4702 if (lrp->lrs_present)
376675da 4703 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
bac966d6 4704 return 0;
9cf514cc
CH		 4705}
4706#endif /* CONFIG_NFSD_PNFS */
4707
29ae7f9d 4708static __be32
e0639dc5
OK		 4709nfsd42_encode_write_res(struct nfsd4_compoundres *resp,
4710 struct nfsd42_write_res *write, bool sync)
29ae7f9d
AS		 4711{
4712 __be32 *p;
e0639dc5
OK		 4713 p = xdr_reserve_space(&resp->xdr, 4);
4714 if (!p)
4715 return nfserr_resource;
29ae7f9d 4716
e0639dc5
OK		 4717 if (sync)
4718 *p++ = cpu_to_be32(0);
4719 else {
4720 __be32 nfserr;
4721 *p++ = cpu_to_be32(1);
4722 nfserr = nfsd4_encode_stateid(&resp->xdr, &write->cb_stateid);
4723 if (nfserr)
4724 return nfserr;
4725 }
4726 p = xdr_reserve_space(&resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE);
29ae7f9d
AS		 4727 if (!p)
4728 return nfserr_resource;
4729
29ae7f9d
AS		 4730 p = xdr_encode_hyper(p, write->wr_bytes_written);
4731 *p++ = cpu_to_be32(write->wr_stable_how);
4732 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4733 NFS4_VERIFIER_SIZE);
4734 return nfs_ok;
4735}
4736
51911868
OK		 4737static __be32
4738nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns)
4739{
4740 struct xdr_stream *xdr = &resp->xdr;
4741 struct nfs42_netaddr *addr;
4742 __be32 *p;
4743
4744 p = xdr_reserve_space(xdr, 4);
4745 *p++ = cpu_to_be32(ns->nl4_type);
4746
4747 switch (ns->nl4_type) {
4748 case NL4_NETADDR:
4749 addr = &ns->u.nl4_addr;
4750
4751 /* netid_len, netid, uaddr_len, uaddr (port included
4752 * in RPCBIND_MAXUADDRLEN)
4753 */
4754 p = xdr_reserve_space(xdr,
4755 4 /* netid len */ +
4756 (XDR_QUADLEN(addr->netid_len) * 4) +
4757 4 /* uaddr len */ +
4758 (XDR_QUADLEN(addr->addr_len) * 4));
4759 if (!p)
4760 return nfserr_resource;
4761
4762 *p++ = cpu_to_be32(addr->netid_len);
4763 p = xdr_encode_opaque_fixed(p, addr->netid,
4764 addr->netid_len);
4765 *p++ = cpu_to_be32(addr->addr_len);
4766 p = xdr_encode_opaque_fixed(p, addr->addr,
4767 addr->addr_len);
4768 break;
4769 default:
4770 WARN_ON_ONCE(ns->nl4_type != NL4_NETADDR);
4771 return nfserr_inval;
4772 }
4773
4774 return 0;
4775}
4776
29ae7f9d
AS		 4777static __be32
4778nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4779 struct nfsd4_copy *copy)
4780{
4781 __be32 *p;
4782
e0639dc5
OK		 4783 nfserr = nfsd42_encode_write_res(resp, &copy->cp_res,
4784 copy->cp_synchronous);
bac966d6
BF		 4785 if (nfserr)
4786 return nfserr;
29ae7f9d 4787
bac966d6 4788 p = xdr_reserve_space(&resp->xdr, 4 + 4);
edcc8452 4789 *p++ = xdr_one; /* cr_consecutive */
bac966d6
BF		 4790 *p++ = cpu_to_be32(copy->cp_synchronous);
4791 return 0;
29ae7f9d
AS		 4792}
4793
6308bc98
OK		 4794static __be32
4795nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
4796 struct nfsd4_offload_status *os)
4797{
4798 struct xdr_stream *xdr = &resp->xdr;
4799 __be32 *p;
4800
4801 p = xdr_reserve_space(xdr, 8 + 4);
4802 if (!p)
4803 return nfserr_resource;
4804 p = xdr_encode_hyper(p, os->count);
4805 *p++ = cpu_to_be32(0);
528b8493
AS		 4806 return nfserr;
4807}
4808
4809static __be32
4810nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp,
4811 struct nfsd4_read *read,
9f0b5792
AS		 4812 unsigned long *maxcount, u32 *eof,
4813 loff_t *pos)
528b8493
AS		 4814{
4815 struct xdr_stream *xdr = &resp->xdr;
4816 struct file *file = read->rd_nf->nf_file;
4817 int starting_len = xdr->buf->len;
9f0b5792 4818 loff_t hole_pos;
528b8493
AS		 4819 __be32 nfserr;
4820 __be32 *p, tmp;
4821 __be64 tmp64;
4822
9f0b5792 4823 hole_pos = pos ? *pos : vfs_llseek(file, read->rd_offset, SEEK_HOLE);
2db27992 4824 if (hole_pos > read->rd_offset)
278765ea
AS		 4825 *maxcount = min_t(unsigned long, *maxcount, hole_pos - read->rd_offset);
4826 *maxcount = min_t(unsigned long, *maxcount, (xdr->buf->buflen - xdr->buf->len));
528b8493
AS		 4827
4828 /* Content type, offset, byte count */
4829 p = xdr_reserve_space(xdr, 4 + 8 + 4);
4830 if (!p)
4831 return nfserr_resource;
4832
278765ea 4833 read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, *maxcount);
528b8493
AS		 4834 if (read->rd_vlen < 0)
4835 return nfserr_resource;
4836
4837 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
278765ea 4838 resp->rqstp->rq_vec, read->rd_vlen, maxcount, eof);
528b8493
AS		 4839 if (nfserr)
4840 return nfserr;
4841
4842 tmp = htonl(NFS4_CONTENT_DATA);
4843 write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
4844 tmp64 = cpu_to_be64(read->rd_offset);
4845 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp64, 8);
278765ea 4846 tmp = htonl(*maxcount);
528b8493
AS		 4847 write_bytes_to_xdr_buf(xdr->buf, starting_len + 12, &tmp, 4);
4848 return nfs_ok;
4849}
4850
2db27992
AS		 4851static __be32
4852nfsd4_encode_read_plus_hole(struct nfsd4_compoundres *resp,
4853 struct nfsd4_read *read,
278765ea 4854 unsigned long *maxcount, u32 *eof)
2db27992
AS		 4855{
4856 struct file *file = read->rd_nf->nf_file;
278765ea 4857 loff_t data_pos = vfs_llseek(file, read->rd_offset, SEEK_DATA);
9f0b5792 4858 loff_t f_size = i_size_read(file_inode(file));
278765ea 4859 unsigned long count;
2db27992
AS		 4860 __be32 *p;
4861
278765ea 4862 if (data_pos == -ENXIO)
9f0b5792
AS		 4863 data_pos = f_size;
4864 else if (data_pos <= read->rd_offset || (data_pos < f_size && data_pos % PAGE_SIZE))
4865 return nfsd4_encode_read_plus_data(resp, read, maxcount, eof, &f_size);
278765ea
AS		 4866 count = data_pos - read->rd_offset;
4867
2db27992
AS		 4868 /* Content type, offset, byte count */
4869 p = xdr_reserve_space(&resp->xdr, 4 + 8 + 8);
4870 if (!p)
4871 return nfserr_resource;
4872
4873 *p++ = htonl(NFS4_CONTENT_HOLE);
4874 p = xdr_encode_hyper(p, read->rd_offset);
278765ea 4875 p = xdr_encode_hyper(p, count);
2db27992 4876
9f0b5792 4877 *eof = (read->rd_offset + count) >= f_size;
278765ea 4878 *maxcount = min_t(unsigned long, count, *maxcount);
2db27992
AS		 4879 return nfs_ok;
4880}
4881
528b8493
AS		 4882static __be32
4883nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr,
4884 struct nfsd4_read *read)
4885{
278765ea 4886 unsigned long maxcount, count;
528b8493
AS		 4887 struct xdr_stream *xdr = &resp->xdr;
4888 struct file *file;
4889 int starting_len = xdr->buf->len;
9f0b5792 4890 int last_segment = xdr->buf->len;
528b8493
AS		 4891 int segments = 0;
4892 __be32 *p, tmp;
9f0b5792 4893 bool is_data;
2db27992 4894 loff_t pos;
528b8493
AS		 4895 u32 eof;
4896
4897 if (nfserr)
4898 return nfserr;
4899 file = read->rd_nf->nf_file;
4900
4901 /* eof flag, segment count */
4902 p = xdr_reserve_space(xdr, 4 + 4);
4903 if (!p)
4904 return nfserr_resource;
4905 xdr_commit_encode(xdr);
4906
4907 maxcount = svc_max_payload(resp->rqstp);
4908 maxcount = min_t(unsigned long, maxcount,
4909 (xdr->buf->buflen - xdr->buf->len));
4910 maxcount = min_t(unsigned long, maxcount, read->rd_length);
278765ea 4911 count = maxcount;
528b8493
AS		 4912
4913 eof = read->rd_offset >= i_size_read(file_inode(file));
2db27992
AS		 4914 if (eof)
4915 goto out;
4916
9f0b5792
AS		 4917 pos = vfs_llseek(file, read->rd_offset, SEEK_HOLE);
4918 is_data = pos > read->rd_offset;
2db27992 4919
9f0b5792 4920 while (count > 0 && !eof) {
278765ea 4921 maxcount = count;
9f0b5792
AS		 4922 if (is_data)
4923 nfserr = nfsd4_encode_read_plus_data(resp, read, &maxcount, &eof,
4924 segments == 0 ? &pos : NULL);
4925 else
4926 nfserr = nfsd4_encode_read_plus_hole(resp, read, &maxcount, &eof);
278765ea
AS		 4927 if (nfserr)
4928 goto out;
4929 count -= maxcount;
4930 read->rd_offset += maxcount;
9f0b5792
AS		 4931 is_data = !is_data;
4932 last_segment = xdr->buf->len;
528b8493
AS		 4933 segments++;
4934 }
4935
2db27992 4936out:
278765ea 4937 if (nfserr && segments == 0)
528b8493
AS		 4938 xdr_truncate_encode(xdr, starting_len);
4939 else {
4940 tmp = htonl(eof);
4941 write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
4942 tmp = htonl(segments);
4943 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
9f0b5792
AS		 4944 if (nfserr) {
4945 xdr_truncate_encode(xdr, last_segment);
4946 nfserr = nfs_ok;
4947 }
528b8493 4948 }
6308bc98
OK		 4949
4950 return nfserr;
4951}
4952
51911868
OK		 4953static __be32
4954nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr,
4955 struct nfsd4_copy_notify *cn)
4956{
4957 struct xdr_stream *xdr = &resp->xdr;
4958 __be32 *p;
4959
4960 if (nfserr)
4961 return nfserr;
4962
4963 /* 8 sec, 4 nsec */
4964 p = xdr_reserve_space(xdr, 12);
4965 if (!p)
4966 return nfserr_resource;
4967
4968 /* cnr_lease_time */
4969 p = xdr_encode_hyper(p, cn->cpn_sec);
4970 *p++ = cpu_to_be32(cn->cpn_nsec);
4971
4972 /* cnr_stateid */
4973 nfserr = nfsd4_encode_stateid(xdr, &cn->cpn_cnr_stateid);
4974 if (nfserr)
4975 return nfserr;
4976
4977 /* cnr_src.nl_nsvr */
4978 p = xdr_reserve_space(xdr, 4);
4979 if (!p)
4980 return nfserr_resource;
4981
4982 *p++ = cpu_to_be32(1);
4983
4984 return nfsd42_encode_nl4_server(resp, &cn->cpn_src);
4985}
4986
24bab491
AS		 4987static __be32
4988nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4989 struct nfsd4_seek *seek)
4990{
4991 __be32 *p;
4992
24bab491
AS		 4993 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4994 *p++ = cpu_to_be32(seek->seek_eof);
4995 p = xdr_encode_hyper(p, seek->seek_pos);
4996
bac966d6 4997 return 0;
24bab491
AS		 4998}
4999
695e12f8
BH		 5000static __be32
5001nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
5002{
5003 return nfserr;
5004}
5005
23e50fe3
FL		 5006/*
5007 * Encode kmalloc-ed buffer in to XDR stream.
5008 */
b9a49237 5009static __be32
23e50fe3
FL		 5010nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen)
5011{
5012 u32 cplen;
5013 __be32 *p;
5014
5015 cplen = min_t(unsigned long, buflen,
5016 ((void *)xdr->end - (void *)xdr->p));
5017 p = xdr_reserve_space(xdr, cplen);
5018 if (!p)
5019 return nfserr_resource;
5020
5021 memcpy(p, buf, cplen);
5022 buf += cplen;
5023 buflen -= cplen;
5024
5025 while (buflen) {
5026 cplen = min_t(u32, buflen, PAGE_SIZE);
5027 p = xdr_reserve_space(xdr, cplen);
5028 if (!p)
5029 return nfserr_resource;
5030
5031 memcpy(p, buf, cplen);
5032
5033 if (cplen < PAGE_SIZE) {
5034 /*
5035 * We're done, with a length that wasn't page
5036 * aligned, so possibly not word aligned. Pad
5037 * any trailing bytes with 0.
5038 */
5039 xdr_encode_opaque_fixed(p, NULL, cplen);
5040 break;
5041 }
5042
5043 buflen -= PAGE_SIZE;
5044 buf += PAGE_SIZE;
5045 }
5046
5047 return 0;
5048}
5049
5050static __be32
5051nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5052 struct nfsd4_getxattr *getxattr)
5053{
5054 struct xdr_stream *xdr = &resp->xdr;
5055 __be32 *p, err;
5056
5057 p = xdr_reserve_space(xdr, 4);
5058 if (!p)
5059 return nfserr_resource;
5060
5061 *p = cpu_to_be32(getxattr->getxa_len);
5062
5063 if (getxattr->getxa_len == 0)
5064 return 0;
5065
5066 err = nfsd4_vbuf_to_stream(xdr, getxattr->getxa_buf,
5067 getxattr->getxa_len);
5068
5069 kvfree(getxattr->getxa_buf);
5070
5071 return err;
5072}
5073
5074static __be32
5075nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5076 struct nfsd4_setxattr *setxattr)
5077{
5078 struct xdr_stream *xdr = &resp->xdr;
5079 __be32 *p;
5080
5081 p = xdr_reserve_space(xdr, 20);
5082 if (!p)
5083 return nfserr_resource;
5084
5085 encode_cinfo(p, &setxattr->setxa_cinfo);
5086
5087 return 0;
5088}
5089
5090/*
5091 * See if there are cookie values that can be rejected outright.
5092 */
5093static __be32
5094nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs,
5095 u32 *offsetp)
5096{
5097 u64 cookie = listxattrs->lsxa_cookie;
5098
5099 /*
5100 * If the cookie is larger than the maximum number we can fit
5101 * in either the buffer we just got back from vfs_listxattr, or,
5102 * XDR-encoded, in the return buffer, it's invalid.
5103 */
5104 if (cookie > (listxattrs->lsxa_len) / (XATTR_USER_PREFIX_LEN + 2))
5105 return nfserr_badcookie;
5106
5107 if (cookie > (listxattrs->lsxa_maxcount /
5108 (XDR_QUADLEN(XATTR_USER_PREFIX_LEN + 2) + 4)))
5109 return nfserr_badcookie;
5110
5111 *offsetp = (u32)cookie;
5112 return 0;
5113}
5114
5115static __be32
5116nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
5117 struct nfsd4_listxattrs *listxattrs)
5118{
5119 struct xdr_stream *xdr = &resp->xdr;
5120 u32 cookie_offset, count_offset, eof;
5121 u32 left, xdrleft, slen, count;
5122 u32 xdrlen, offset;
5123 u64 cookie;
5124 char *sp;
b9a49237 5125 __be32 status, tmp;
23e50fe3
FL		 5126 __be32 *p;
5127 u32 nuser;
5128
5129 eof = 1;
5130
5131 status = nfsd4_listxattr_validate_cookie(listxattrs, &offset);
5132 if (status)
5133 goto out;
5134
5135 /*
5136 * Reserve space for the cookie and the name array count. Record
5137 * the offsets to save them later.
5138 */
5139 cookie_offset = xdr->buf->len;
5140 count_offset = cookie_offset + 8;
5141 p = xdr_reserve_space(xdr, 12);
5142 if (!p) {
5143 status = nfserr_resource;
5144 goto out;
5145 }
5146
5147 count = 0;
5148 left = listxattrs->lsxa_len;
5149 sp = listxattrs->lsxa_buf;
5150 nuser = 0;
5151
5152 xdrleft = listxattrs->lsxa_maxcount;
5153
5154 while (left > 0 && xdrleft > 0) {
5155 slen = strlen(sp);
5156
5157 /*
4cce11fa 5158 * Check if this is a "user." attribute, skip it if not.
23e50fe3
FL		 5159 */
5160 if (strncmp(sp, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
5161 goto contloop;
5162
5163 slen -= XATTR_USER_PREFIX_LEN;
5164 xdrlen = 4 + ((slen + 3) & ~3);
5165 if (xdrlen > xdrleft) {
5166 if (count == 0) {
5167 /*
5168 * Can't even fit the first attribute name.
5169 */
5170 status = nfserr_toosmall;
5171 goto out;
5172 }
5173 eof = 0;
5174 goto wreof;
5175 }
5176
5177 left -= XATTR_USER_PREFIX_LEN;
5178 sp += XATTR_USER_PREFIX_LEN;
5179 if (nuser++ < offset)
5180 goto contloop;
5181
5182
5183 p = xdr_reserve_space(xdr, xdrlen);
5184 if (!p) {
5185 status = nfserr_resource;
5186 goto out;
5187 }
5188
e2a1840e 5189 xdr_encode_opaque(p, sp, slen);
23e50fe3
FL		 5190
5191 xdrleft -= xdrlen;
5192 count++;
5193contloop:
5194 sp += slen + 1;
5195 left -= slen + 1;
5196 }
5197
5198 /*
5199 * If there were user attributes to copy, but we didn't copy
5200 * any, the offset was too large (e.g. the cookie was invalid).
5201 */
5202 if (nuser > 0 && count == 0) {
5203 status = nfserr_badcookie;
5204 goto out;
5205 }
5206
5207wreof:
5208 p = xdr_reserve_space(xdr, 4);
5209 if (!p) {
5210 status = nfserr_resource;
5211 goto out;
5212 }
5213 *p = cpu_to_be32(eof);
5214
5215 cookie = offset + count;
5216
5217 write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &cookie, 8);
b9a49237
CL		 5218 tmp = cpu_to_be32(count);
5219 write_bytes_to_xdr_buf(xdr->buf, count_offset, &tmp, 4);
23e50fe3
FL		 5220out:
5221 if (listxattrs->lsxa_len)
5222 kvfree(listxattrs->lsxa_buf);
5223 return status;
5224}
5225
5226static __be32
5227nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5228 struct nfsd4_removexattr *removexattr)
5229{
5230 struct xdr_stream *xdr = &resp->xdr;
5231 __be32 *p;
5232
5233 p = xdr_reserve_space(xdr, 20);
5234 if (!p)
5235 return nfserr_resource;
5236
5237 p = encode_cinfo(p, &removexattr->rmxa_cinfo);
5238 return 0;
5239}
5240
695e12f8
BH		 5241typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
5242
2db134eb
AA		 5243/*
5244 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
5245 * since we don't need to filter out obsolete ops as this is
5246 * done in the decoding phase.
5247 */
c1df609d 5248static const nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 5249 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
5250 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
5251 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
5252 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
5253 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
5254 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
5255 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
5256 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
5257 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
5258 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
5259 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
5260 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
5261 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
5262 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
5263 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
5264 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 5265 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 5266 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
5267 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
5268 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
5269 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
5270 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
5271 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
5272 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
5273 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
5274 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
5275 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
5276 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
5277 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
5278 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
5279 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
5280 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
5281 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
5282 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
5283 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
5284 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
5285 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 5286
5287 /* NFSv4.1 operations */
5288 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 5289 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 5290 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
5291 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 5292 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
5293 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb 5294 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc
CH		 5295#ifdef CONFIG_NFSD_PNFS
5296 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
5297 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
5298 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
5299 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
5300 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
5301#else
2db134eb
AA		 5302 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
5303 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
5304 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
5305 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
5306 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc 5307#endif
22b6dee8 5308 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 5309 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
5310 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 5311 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 5312 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
5313 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
5314 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
87a15a80
AS		 5315
5316 /* NFSv4.2 operations */
5317 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
29ae7f9d 5318 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
51911868 5319 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_copy_notify,
87a15a80
AS		 5320 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
5321 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
5322 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
5323 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
5324 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
6308bc98 5325 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status,
528b8493 5326 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_read_plus,
24bab491 5327 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
87a15a80 5328 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
ffa0160a 5329 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
23e50fe3
FL		 5330
5331 /* RFC 8276 extended atributes operations */
5332 [OP_GETXATTR] = (nfsd4_enc)nfsd4_encode_getxattr,
5333 [OP_SETXATTR] = (nfsd4_enc)nfsd4_encode_setxattr,
5334 [OP_LISTXATTRS] = (nfsd4_enc)nfsd4_encode_listxattrs,
5335 [OP_REMOVEXATTR] = (nfsd4_enc)nfsd4_encode_removexattr,
695e12f8
BH		 5336};
5337
496c262c 5338/*
a8095f7e
BF		 5339 * Calculate whether we still have space to encode repsize bytes.
5340 * There are two considerations:
5341 * - For NFS versions >=4.1, the size of the reply must stay within
5342 * session limits
5343 * - For all NFS versions, we must stay within limited preallocated
5344 * buffer space.
496c262c 5345 *
a8095f7e
BF		 5346 * This is called before the operation is processed, so can only provide
5347 * an upper estimate. For some nonidempotent operations (such as
5348 * getattr), it's not necessarily a problem if that estimate is wrong,
5349 * as we can fail it after processing without significant side effects.
496c262c 5350 */
a8095f7e 5351__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 5352{
67492c99 5353 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 5354 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 5355
47ee5298
BF		 5356 if (buf->len + respsize <= buf->buflen)
5357 return nfs_ok;
5358 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 5359 return nfserr_resource;
47ee5298
BF		 5360 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
5361 WARN_ON_ONCE(1);
5362 return nfserr_rep_too_big_to_cache;
ea8d7720 5363 }
47ee5298 5364 return nfserr_rep_too_big;
496c262c
AA		 5365}
5366
1da177e4
LT		 5367void
5368nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
5369{
082d4bd7 5370 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 5371 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 5372 struct svc_rqst *rqstp = resp->rqstp;
34b1744c 5373 const struct nfsd4_operation *opdesc = op->opdesc;
082d4bd7 5374 int post_err_offset;
07d1f802 5375 nfsd4_enc encoder;
bc749ca4 5376 __be32 *p;
1da177e4 5377
d0a381dd
BF		 5378 p = xdr_reserve_space(xdr, 8);
5379 if (!p) {
5380 WARN_ON_ONCE(1);
5381 return;
5382 }
c373b0a4 5383 *p++ = cpu_to_be32(op->opnum);
082d4bd7 5384 post_err_offset = xdr->buf->len;
1da177e4 5385
695e12f8
BH		 5386 if (op->opnum == OP_ILLEGAL)
5387 goto status;
b7571e4c
BF		 5388 if (op->status && opdesc &&
5389 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
5390 goto status;
695e12f8
BH		 5391 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
5392 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 5393 encoder = nfsd4_enc_ops[op->opnum];
5394 op->status = encoder(resp, op->status, &op->u);
08281341
CL		 5395 if (op->status)
5396 trace_nfsd_compound_encode_err(rqstp, op->opnum, op->status);
34b1744c
BF		 5397 if (opdesc && opdesc->op_release)
5398 opdesc->op_release(&op->u);
2825a7f9
BF		 5399 xdr_commit_encode(xdr);
5400
067e1ace 5401 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 5402 if (!op->status) {
5403 int space_needed = 0;
5404 if (!nfsd4_last_compound_op(rqstp))
5405 space_needed = COMPOUND_ERR_SLACK_SPACE;
5406 op->status = nfsd4_check_resp_size(resp, space_needed);
5407 }
c8f13d97
BF		 5408 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
5409 struct nfsd4_slot *slot = resp->cstate.slot;
5410
5411 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
5412 op->status = nfserr_rep_too_big_to_cache;
5413 else
5414 op->status = nfserr_rep_too_big;
5415 }
07d1f802
BF		 5416 if (op->status == nfserr_resource ||
5417 op->status == nfserr_rep_too_big ||
5418 op->status == nfserr_rep_too_big_to_cache) {
5419 /*
5420 * The operation may have already been encoded or
5421 * partially encoded. No op returns anything additional
5422 * in the case of one of these three errors, so we can
5423 * just truncate back to after the status. But it's a
5424 * bug if we had to do this on a non-idempotent op:
5425 */
5426 warn_on_nonidempotent_op(op);
082d4bd7 5427 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 5428 }
9411b1d4 5429 if (so) {
082d4bd7
BF		 5430 int len = xdr->buf->len - post_err_offset;
5431
9411b1d4 5432 so->so_replay.rp_status = op->status;
082d4bd7
BF		 5433 so->so_replay.rp_buflen = len;
5434 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
5435 so->so_replay.rp_buf, len);
9411b1d4 5436 }
695e12f8 5437status:
082d4bd7
BF		 5438 /* Note that op->status is already in network byte order: */
5439 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 5440}
5441
5442/*
5443 * Encode the reply stored in the stateowner reply cache
5444 *
5445 * XDR note: do not encode rp->rp_buflen: the buffer contains the
5446 * previously sent already encoded operation.
1da177e4
LT		 5447 */
5448void
d0a381dd 5449nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 5450{
bc749ca4 5451 __be32 *p;
1da177e4
LT		 5452 struct nfs4_replay *rp = op->replay;
5453
d0a381dd
BF		 5454 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
5455 if (!p) {
5456 WARN_ON_ONCE(1);
5457 return;
5458 }
c373b0a4 5459 *p++ = cpu_to_be32(op->opnum);
1da177e4 5460 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 5461
0c0c267b 5462 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 5463}
5464
8537488b 5465void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
1da177e4 5466{
3e98abff
BF		 5467 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5468
1da177e4
LT		 5469 if (args->ops != args->iops) {
5470 kfree(args->ops);
5471 args->ops = args->iops;
5472 }
1da177e4 5473 while (args->to_free) {
d5e23383 5474 struct svcxdr_tmpbuf *tb = args->to_free;
1da177e4 5475 args->to_free = tb->next;
1da177e4
LT		 5476 kfree(tb);
5477 }
5478}
5479
5480int
026fec7e 5481nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
1da177e4 5482{
026fec7e
CH		 5483 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5484
c1346a12 5485 /* svcxdr_tmp_alloc */
1da177e4
LT		 5486 args->tmpp = NULL;
5487 args->to_free = NULL;
c1346a12
CL		 5488
5489 args->xdr = &rqstp->rq_arg_stream;
1da177e4
LT		 5490 args->ops = args->iops;
5491 args->rqstp = rqstp;
5492
3e98abff 5493 return !nfsd4_decode_compound(args);
1da177e4
LT		 5494}
5495
5496int
63f8de37 5497nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
1da177e4 5498{
63f8de37 5499 struct nfsd4_compoundres *resp = rqstp->rq_resp;
6ac90391
BF		 5500 struct xdr_buf *buf = resp->xdr.buf;
5501
5502 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
5503 buf->tail[0].iov_len);
dd97fdde 5504
cc028a10
CL		 5505 *p = resp->cstate.status;
5506
2825a7f9
BF		 5507 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
5508
1da177e4
LT		 5509 p = resp->tagp;
5510 *p++ = htonl(resp->taglen);
5511 memcpy(p, resp->tag, resp->taglen);
5512 p += XDR_QUADLEN(resp->taglen);
5513 *p++ = htonl(resp->opcnt);
5514
b607664e 5515 nfsd4_sequence_done(resp);
1da177e4
LT		 5516 return 1;
5517}
5518
5519/*
5520 * Local variables:
5521 * c-basic-offset: 8
5522 * End:
5523 */
Michael's Linux tree.