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SUNRPC: Handle TCP socket sends with kernel_sendpage() again
[people/ms/linux.git] / fs / nfsd / nfs4xdr.c
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1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1da177e4
LT		 34 */
35
96bcad50 36#include <linux/file.h>
5a0e3ad6 37#include <linux/slab.h>
1da177e4 38#include <linux/namei.h>
341eb184 39#include <linux/statfs.h>
0733d213 40#include <linux/utsname.h>
17456804 41#include <linux/pagemap.h>
4796f457 42#include <linux/sunrpc/svcauth_gss.h>
84e1b21d 43#include <linux/sunrpc/addr.h>
23e50fe3
FL		 44#include <linux/xattr.h>
45#include <uapi/linux/xattr.h>
9a74af21 46
2ca72e17
BF		 47#include "idmap.h"
48#include "acl.h"
9a74af21 49#include "xdr4.h"
0a3adade 50#include "vfs.h"
17456804 51#include "state.h"
1091006c 52#include "cache.h"
3d733711 53#include "netns.h"
9cf514cc 54#include "pnfs.h"
5c4583b2 55#include "filecache.h"
2ca72e17 56
08281341
CL		 57#include "trace.h"
58
18032ca0
DQ		 59#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
60#include <linux/security.h>
61#endif
62
63
1da177e4
LT		 64#define NFSDDBG_FACILITY NFSDDBG_XDR
65
5cf23dbb 66const u32 nfsd_suppattrs[3][3] = {
916d2d84
BF		 67 {NFSD4_SUPPORTED_ATTRS_WORD0,
68 NFSD4_SUPPORTED_ATTRS_WORD1,
69 NFSD4_SUPPORTED_ATTRS_WORD2},
70
71 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
72 NFSD4_1_SUPPORTED_ATTRS_WORD1,
73 NFSD4_1_SUPPORTED_ATTRS_WORD2},
74
75 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
76 NFSD4_1_SUPPORTED_ATTRS_WORD1,
77 NFSD4_2_SUPPORTED_ATTRS_WORD2},
78};
79
42ca0993
BF		 80/*
81 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
82 * directory in order to indicate to the client that a filesystem boundary is present
83 * We use a fixed fsid for a referral
84 */
85#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
86#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
87
b37ad28b 88static __be32
a36b1725 89check_filename(char *str, int len)
1da177e4
LT		 90{
91 int i;
92
93 if (len == 0)
94 return nfserr_inval;
000dfa18
CL		 95 if (len > NFS4_MAXNAMLEN)
96 return nfserr_nametoolong;
1da177e4 97 if (isdotent(str, len))
a36b1725 98 return nfserr_badname;
1da177e4
LT		 99 for (i = 0; i < len; i++)
100 if (str[i] == '/')
a36b1725 101 return nfserr_badname;
1da177e4
LT		 102 return 0;
103}
104
60adfc50
AA		 105static int zero_clientid(clientid_t *clid)
106{
107 return (clid->cl_boot == 0) && (clid->cl_id == 0);
108}
109
2d8498db 110/**
d5e23383 111 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
ce043ac8 112 * @argp: NFSv4 compound argument structure
ed992753 113 * @len: length of buffer to allocate
2d8498db 114 *
ed992753
TM		 115 * Allocates a buffer of size @len to be freed when processing the compound
116 * operation described in @argp finishes.
2d8498db 117 */
d5e23383
BF		 118static void *
119svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
1da177e4 120{
d5e23383 121 struct svcxdr_tmpbuf *tb;
1da177e4 122
d5e23383 123 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
1da177e4 124 if (!tb)
d5e23383 125 return NULL;
1da177e4
LT		 126 tb->next = argp->to_free;
127 argp->to_free = tb;
d5e23383 128 return tb->buf;
1da177e4
LT		 129}
130
29c353b3
BF		 131/*
132 * For xdr strings that need to be passed to other kernel api's
133 * as null-terminated strings.
134 *
135 * Note null-terminating in place usually isn't safe since the
136 * buffer might end on a page boundary.
137 */
138static char *
139svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
140{
d5e23383 141 char *p = svcxdr_tmpalloc(argp, len + 1);
29c353b3
BF		 142
143 if (!p)
144 return NULL;
145 memcpy(p, buf, len);
146 p[len] = '\0';
29c353b3 147 return p;
1da177e4
LT		 148}
149
5dcbfabb
CL		 150/*
151 * NFSv4 basic data type decoders
152 */
153
1a994408
CL		 154/*
155 * This helper handles variable-length opaques which belong to protocol
156 * elements that this implementation does not support.
157 */
158static __be32
159nfsd4_decode_ignored_string(struct nfsd4_compoundargs *argp, u32 maxlen)
160{
161 u32 len;
162
163 if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
164 return nfserr_bad_xdr;
165 if (maxlen && len > maxlen)
166 return nfserr_bad_xdr;
167 if (!xdr_inline_decode(argp->xdr, len))
168 return nfserr_bad_xdr;
169
170 return nfs_ok;
171}
172
5dcbfabb
CL		 173static __be32
174nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
175{
176 __be32 *p;
177 u32 len;
178
179 if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
180 return nfserr_bad_xdr;
181 if (len == 0 || len > NFS4_OPAQUE_LIMIT)
182 return nfserr_bad_xdr;
183 p = xdr_inline_decode(argp->xdr, len);
184 if (!p)
185 return nfserr_bad_xdr;
186 o->data = svcxdr_tmpalloc(argp, len);
187 if (!o->data)
188 return nfserr_jukebox;
189 o->len = len;
190 memcpy(o->data, p, len);
191
192 return nfs_ok;
193}
194
000dfa18
CL		 195static __be32
196nfsd4_decode_component4(struct nfsd4_compoundargs *argp, char **namp, u32 *lenp)
197{
198 __be32 *p, status;
199
200 if (xdr_stream_decode_u32(argp->xdr, lenp) < 0)
201 return nfserr_bad_xdr;
202 p = xdr_inline_decode(argp->xdr, *lenp);
203 if (!p)
204 return nfserr_bad_xdr;
205 status = check_filename((char *)p, *lenp);
206 if (status)
207 return status;
208 *namp = svcxdr_tmpalloc(argp, *lenp);
209 if (!*namp)
210 return nfserr_jukebox;
211 memcpy(*namp, p, *lenp);
212
213 return nfs_ok;
214}
215
1c3eff7e
CL		 216static __be32
217nfsd4_decode_nfstime4(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
218{
219 __be32 *p;
220
221 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 3);
222 if (!p)
223 return nfserr_bad_xdr;
224 p = xdr_decode_hyper(p, &tv->tv_sec);
225 tv->tv_nsec = be32_to_cpup(p++);
226 if (tv->tv_nsec >= (u32)1000000000)
227 return nfserr_inval;
228 return nfs_ok;
229}
230
796dd1c6
CL		 231static __be32
232nfsd4_decode_verifier4(struct nfsd4_compoundargs *argp, nfs4_verifier *verf)
233{
234 __be32 *p;
235
236 p = xdr_inline_decode(argp->xdr, NFS4_VERIFIER_SIZE);
237 if (!p)
238 return nfserr_bad_xdr;
239 memcpy(verf->data, p, sizeof(verf->data));
240 return nfs_ok;
241}
242
d1c263a0
CL		 243/**
244 * nfsd4_decode_bitmap4 - Decode an NFSv4 bitmap4
245 * @argp: NFSv4 compound argument structure
246 * @bmval: pointer to an array of u32's to decode into
247 * @bmlen: size of the @bmval array
248 *
249 * The server needs to return nfs_ok rather than nfserr_bad_xdr when
250 * encountering bitmaps containing bits it does not recognize. This
251 * includes bits in bitmap words past WORDn, where WORDn is the last
252 * bitmap WORD the implementation currently supports. Thus we are
253 * careful here to simply ignore bits in bitmap words that this
254 * implementation has yet to support explicitly.
255 *
256 * Return values:
257 * %nfs_ok: @bmval populated successfully
258 * %nfserr_bad_xdr: the encoded bitmap was invalid
259 */
260static __be32
261nfsd4_decode_bitmap4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen)
262{
263 u32 i, count;
264 __be32 *p;
265
266 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
267 return nfserr_bad_xdr;
268 /* request sanity */
269 if (count > 1000)
270 return nfserr_bad_xdr;
271 p = xdr_inline_decode(argp->xdr, count << 2);
272 if (!p)
273 return nfserr_bad_xdr;
274 i = 0;
275 while (i < count)
276 bmval[i++] = be32_to_cpup(p++);
277 while (i < bmlen)
278 bmval[i++] = 0;
279
280 return nfs_ok;
281}
282
c941a968
CL		 283static __be32
284nfsd4_decode_nfsace4(struct nfsd4_compoundargs *argp, struct nfs4_ace *ace)
285{
286 __be32 *p, status;
287 u32 length;
288
289 if (xdr_stream_decode_u32(argp->xdr, &ace->type) < 0)
290 return nfserr_bad_xdr;
291 if (xdr_stream_decode_u32(argp->xdr, &ace->flag) < 0)
292 return nfserr_bad_xdr;
293 if (xdr_stream_decode_u32(argp->xdr, &ace->access_mask) < 0)
294 return nfserr_bad_xdr;
295
296 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
297 return nfserr_bad_xdr;
298 p = xdr_inline_decode(argp->xdr, length);
299 if (!p)
300 return nfserr_bad_xdr;
301 ace->whotype = nfs4_acl_get_whotype((char *)p, length);
302 if (ace->whotype != NFS4_ACL_WHO_NAMED)
303 status = nfs_ok;
304 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
305 status = nfsd_map_name_to_gid(argp->rqstp,
306 (char *)p, length, &ace->who_gid);
307 else
308 status = nfsd_map_name_to_uid(argp->rqstp,
309 (char *)p, length, &ace->who_uid);
310
311 return status;
312}
313
314/* A counted array of nfsace4's */
315static noinline __be32
316nfsd4_decode_acl(struct nfsd4_compoundargs *argp, struct nfs4_acl **acl)
317{
318 struct nfs4_ace *ace;
319 __be32 status;
320 u32 count;
321
322 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
323 return nfserr_bad_xdr;
324
325 if (count > xdr_stream_remaining(argp->xdr) / 20)
326 /*
327 * Even with 4-byte names there wouldn't be
328 * space for that many aces; something fishy is
329 * going on:
330 */
331 return nfserr_fbig;
332
333 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(count));
334 if (*acl == NULL)
335 return nfserr_jukebox;
336
337 (*acl)->naces = count;
338 for (ace = (*acl)->aces; ace < (*acl)->aces + count; ace++) {
339 status = nfsd4_decode_nfsace4(argp, ace);
340 if (status)
341 return status;
342 }
343
344 return nfs_ok;
345}
346
dabe9182
CL		 347static noinline __be32
348nfsd4_decode_security_label(struct nfsd4_compoundargs *argp,
349 struct xdr_netobj *label)
350{
351 u32 lfs, pi, length;
352 __be32 *p;
353
354 if (xdr_stream_decode_u32(argp->xdr, &lfs) < 0)
355 return nfserr_bad_xdr;
356 if (xdr_stream_decode_u32(argp->xdr, &pi) < 0)
357 return nfserr_bad_xdr;
358
359 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
360 return nfserr_bad_xdr;
361 if (length > NFS4_MAXLABELLEN)
362 return nfserr_badlabel;
363 p = xdr_inline_decode(argp->xdr, length);
364 if (!p)
365 return nfserr_bad_xdr;
366 label->len = length;
367 label->data = svcxdr_dupstr(argp, p, length);
368 if (!label->data)
369 return nfserr_jukebox;
370
371 return nfs_ok;
372}
373
b37ad28b 374static __be32
d1c263a0
CL		 375nfsd4_decode_fattr4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen,
376 struct iattr *iattr, struct nfs4_acl **acl,
377 struct xdr_netobj *label, int *umask)
1da177e4 378{
081d53fe
CL		 379 unsigned int starting_pos;
380 u32 attrlist4_count;
d1c263a0 381 __be32 *p, status;
1da177e4 382
1da177e4 383 iattr->ia_valid = 0;
d1c263a0
CL		 384 status = nfsd4_decode_bitmap4(argp, bmval, bmlen);
385 if (status)
386 return nfserr_bad_xdr;
1da177e4 387
e864c189
BF		 388 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
389 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
390 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
391 if (nfsd_attrs_supported(argp->minorversion, bmval))
392 return nfserr_inval;
393 return nfserr_attrnotsupp;
394 }
395
081d53fe
CL		 396 if (xdr_stream_decode_u32(argp->xdr, &attrlist4_count) < 0)
397 return nfserr_bad_xdr;
398 starting_pos = xdr_stream_pos(argp->xdr);
1da177e4
LT		 399
400 if (bmval[0] & FATTR4_WORD0_SIZE) {
2ac1b9b2
CL		 401 u64 size;
402
403 if (xdr_stream_decode_u64(argp->xdr, &size) < 0)
404 return nfserr_bad_xdr;
405 iattr->ia_size = size;
1da177e4
LT		 406 iattr->ia_valid |= ATTR_SIZE;
407 }
408 if (bmval[0] & FATTR4_WORD0_ACL) {
c941a968
CL		 409 status = nfsd4_decode_acl(argp, acl);
410 if (status)
411 return status;
1da177e4
LT		 412 } else
413 *acl = NULL;
414 if (bmval[1] & FATTR4_WORD1_MODE) {
1c8f0ad7
CL		 415 u32 mode;
416
417 if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
418 return nfserr_bad_xdr;
419 iattr->ia_mode = mode;
1da177e4
LT		 420 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
421 iattr->ia_valid |= ATTR_MODE;
422 }
423 if (bmval[1] & FATTR4_WORD1_OWNER) {
9853a5ac
CL		 424 u32 length;
425
426 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
427 return nfserr_bad_xdr;
428 p = xdr_inline_decode(argp->xdr, length);
429 if (!p)
430 return nfserr_bad_xdr;
431 status = nfsd_map_name_to_uid(argp->rqstp, (char *)p, length,
432 &iattr->ia_uid);
433 if (status)
47c85291 434 return status;
1da177e4
LT		 435 iattr->ia_valid |= ATTR_UID;
436 }
437 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
393c31dd
CL		 438 u32 length;
439
440 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
441 return nfserr_bad_xdr;
442 p = xdr_inline_decode(argp->xdr, length);
443 if (!p)
444 return nfserr_bad_xdr;
445 status = nfsd_map_name_to_gid(argp->rqstp, (char *)p, length,
446 &iattr->ia_gid);
447 if (status)
47c85291 448 return status;
1da177e4
LT		 449 iattr->ia_valid |= ATTR_GID;
450 }
451 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
1c3eff7e
CL		 452 u32 set_it;
453
454 if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
455 return nfserr_bad_xdr;
456 switch (set_it) {
1da177e4 457 case NFS4_SET_TO_CLIENT_TIME:
1c3eff7e 458 status = nfsd4_decode_nfstime4(argp, &iattr->ia_atime);
4c94e13e
CH		 459 if (status)
460 return status;
1da177e4
LT		 461 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
462 break;
463 case NFS4_SET_TO_SERVER_TIME:
464 iattr->ia_valid |= ATTR_ATIME;
465 break;
466 default:
1c3eff7e 467 return nfserr_bad_xdr;
1da177e4
LT		 468 }
469 }
1da177e4 470 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
1c3eff7e
CL		 471 u32 set_it;
472
473 if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
474 return nfserr_bad_xdr;
475 switch (set_it) {
1da177e4 476 case NFS4_SET_TO_CLIENT_TIME:
1c3eff7e 477 status = nfsd4_decode_nfstime4(argp, &iattr->ia_mtime);
4c94e13e
CH		 478 if (status)
479 return status;
1da177e4
LT		 480 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
481 break;
482 case NFS4_SET_TO_SERVER_TIME:
483 iattr->ia_valid |= ATTR_MTIME;
484 break;
485 default:
1c3eff7e 486 return nfserr_bad_xdr;
1da177e4
LT		 487 }
488 }
18032ca0 489 label->len = 0;
2285ae76
AB		 490 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
491 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
dabe9182
CL		 492 status = nfsd4_decode_security_label(argp, label);
493 if (status)
494 return status;
18032ca0 495 }
47057abd 496 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
66f0476c
CL		 497 u32 mode, mask;
498
47057abd 499 if (!umask)
66f0476c
CL		 500 return nfserr_bad_xdr;
501 if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
502 return nfserr_bad_xdr;
503 iattr->ia_mode = mode & (S_IFMT | S_IALLUGO);
504 if (xdr_stream_decode_u32(argp->xdr, &mask) < 0)
505 return nfserr_bad_xdr;
506 *umask = mask & S_IRWXUGO;
47057abd
AG		 507 iattr->ia_valid |= ATTR_MODE;
508 }
081d53fe
CL		 509
510 /* request sanity: did attrlist4 contain the expected number of words? */
511 if (attrlist4_count != xdr_stream_pos(argp->xdr) - starting_pos)
512 return nfserr_bad_xdr;
1da177e4 513
d1c263a0 514 return nfs_ok;
1da177e4
LT		 515}
516
d3d2f381
CL		 517static __be32
518nfsd4_decode_stateid4(struct nfsd4_compoundargs *argp, stateid_t *sid)
519{
520 __be32 *p;
521
522 p = xdr_inline_decode(argp->xdr, NFS4_STATEID_SIZE);
523 if (!p)
524 return nfserr_bad_xdr;
525 sid->si_generation = be32_to_cpup(p++);
526 memcpy(&sid->si_opaque, p, sizeof(sid->si_opaque));
527 return nfs_ok;
528}
529
144e8269
CL		 530static __be32
531nfsd4_decode_clientid4(struct nfsd4_compoundargs *argp, clientid_t *clientid)
532{
533 __be32 *p;
534
535 p = xdr_inline_decode(argp->xdr, sizeof(__be64));
536 if (!p)
537 return nfserr_bad_xdr;
538 memcpy(clientid, p, sizeof(*clientid));
539 return nfs_ok;
540}
541
542static __be32
543nfsd4_decode_state_owner4(struct nfsd4_compoundargs *argp,
544 clientid_t *clientid, struct xdr_netobj *owner)
545{
546 __be32 status;
547
548 status = nfsd4_decode_clientid4(argp, clientid);
549 if (status)
550 return status;
551 return nfsd4_decode_opaque(argp, owner);
552}
553
04495971
CL		 554#ifdef CONFIG_NFSD_PNFS
555static __be32
556nfsd4_decode_deviceid4(struct nfsd4_compoundargs *argp,
557 struct nfsd4_deviceid *devid)
558{
559 __be32 *p;
560
561 p = xdr_inline_decode(argp->xdr, NFS4_DEVICEID4_SIZE);
562 if (!p)
563 return nfserr_bad_xdr;
564 memcpy(devid, p, sizeof(*devid));
565 return nfs_ok;
566}
5185980d
CL		 567
568static __be32
569nfsd4_decode_layoutupdate4(struct nfsd4_compoundargs *argp,
570 struct nfsd4_layoutcommit *lcp)
571{
572 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_layout_type) < 0)
573 return nfserr_bad_xdr;
574 if (lcp->lc_layout_type < LAYOUT_NFSV4_1_FILES)
575 return nfserr_bad_xdr;
576 if (lcp->lc_layout_type >= LAYOUT_TYPE_MAX)
577 return nfserr_bad_xdr;
578
579 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_up_len) < 0)
580 return nfserr_bad_xdr;
581 if (lcp->lc_up_len > 0) {
582 lcp->lc_up_layout = xdr_inline_decode(argp->xdr, lcp->lc_up_len);
583 if (!lcp->lc_up_layout)
584 return nfserr_bad_xdr;
585 }
586
587 return nfs_ok;
588}
589
645fcad3
CL		 590static __be32
591nfsd4_decode_layoutreturn4(struct nfsd4_compoundargs *argp,
592 struct nfsd4_layoutreturn *lrp)
593{
594 __be32 status;
595
596 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_return_type) < 0)
597 return nfserr_bad_xdr;
598 switch (lrp->lr_return_type) {
599 case RETURN_FILE:
600 if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.offset) < 0)
601 return nfserr_bad_xdr;
602 if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.length) < 0)
603 return nfserr_bad_xdr;
604 status = nfsd4_decode_stateid4(argp, &lrp->lr_sid);
605 if (status)
606 return status;
607 if (xdr_stream_decode_u32(argp->xdr, &lrp->lrf_body_len) < 0)
608 return nfserr_bad_xdr;
609 if (lrp->lrf_body_len > 0) {
610 lrp->lrf_body = xdr_inline_decode(argp->xdr, lrp->lrf_body_len);
611 if (!lrp->lrf_body)
612 return nfserr_bad_xdr;
613 }
614 break;
615 case RETURN_FSID:
616 case RETURN_ALL:
617 lrp->lr_seg.offset = 0;
618 lrp->lr_seg.length = NFS4_MAX_UINT64;
619 break;
620 default:
621 return nfserr_bad_xdr;
622 }
623
624 return nfs_ok;
625}
626
04495971
CL		 627#endif /* CONFIG_NFSD_PNFS */
628
571e0451
CL		 629static __be32
630nfsd4_decode_sessionid4(struct nfsd4_compoundargs *argp,
631 struct nfs4_sessionid *sessionid)
632{
633 __be32 *p;
634
635 p = xdr_inline_decode(argp->xdr, NFS4_MAX_SESSIONID_LEN);
636 if (!p)
637 return nfserr_bad_xdr;
638 memcpy(sessionid->data, p, sizeof(sessionid->data));
639 return nfs_ok;
640}
641
1a994408
CL		 642/* Defined in Appendix A of RFC 5531 */
643static __be32
644nfsd4_decode_authsys_parms(struct nfsd4_compoundargs *argp,
645 struct nfsd4_cb_sec *cbs)
acb2887e 646{
1a994408
CL		 647 u32 stamp, gidcount, uid, gid;
648 __be32 *p, status;
649
650 if (xdr_stream_decode_u32(argp->xdr, &stamp) < 0)
651 return nfserr_bad_xdr;
652 /* machine name */
653 status = nfsd4_decode_ignored_string(argp, 255);
654 if (status)
655 return status;
656 if (xdr_stream_decode_u32(argp->xdr, &uid) < 0)
657 return nfserr_bad_xdr;
658 if (xdr_stream_decode_u32(argp->xdr, &gid) < 0)
659 return nfserr_bad_xdr;
660 if (xdr_stream_decode_u32(argp->xdr, &gidcount) < 0)
661 return nfserr_bad_xdr;
662 if (gidcount > 16)
663 return nfserr_bad_xdr;
664 p = xdr_inline_decode(argp->xdr, gidcount << 2);
665 if (!p)
666 return nfserr_bad_xdr;
667 if (cbs->flavor == (u32)(-1)) {
668 struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
669
670 kuid_t kuid = make_kuid(userns, uid);
671 kgid_t kgid = make_kgid(userns, gid);
672 if (uid_valid(kuid) && gid_valid(kgid)) {
673 cbs->uid = kuid;
674 cbs->gid = kgid;
675 cbs->flavor = RPC_AUTH_UNIX;
676 } else {
677 dprintk("RPC_AUTH_UNIX with invalid uid or gid, ignoring!\n");
678 }
679 }
680
681 return nfs_ok;
682}
683
684static __be32
685nfsd4_decode_gss_cb_handles4(struct nfsd4_compoundargs *argp,
686 struct nfsd4_cb_sec *cbs)
687{
688 __be32 status;
689 u32 service;
690
691 dprintk("RPC_AUTH_GSS callback secflavor not supported!\n");
692
693 if (xdr_stream_decode_u32(argp->xdr, &service) < 0)
694 return nfserr_bad_xdr;
695 if (service < RPC_GSS_SVC_NONE || service > RPC_GSS_SVC_PRIVACY)
696 return nfserr_bad_xdr;
697 /* gcbp_handle_from_server */
698 status = nfsd4_decode_ignored_string(argp, 0);
699 if (status)
700 return status;
701 /* gcbp_handle_from_client */
702 status = nfsd4_decode_ignored_string(argp, 0);
703 if (status)
704 return status;
705
706 return nfs_ok;
707}
708
709/* a counted array of callback_sec_parms4 items */
710static __be32
711nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
712{
713 u32 i, secflavor, nr_secflavs;
714 __be32 status;
acb2887e
BF		 715
716 /* callback_sec_params4 */
1a994408
CL		 717 if (xdr_stream_decode_u32(argp->xdr, &nr_secflavs) < 0)
718 return nfserr_bad_xdr;
57569a70
BF		 719 if (nr_secflavs)
720 cbs->flavor = (u32)(-1);
721 else
722 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
723 cbs->flavor = 0;
1a994408 724
acb2887e 725 for (i = 0; i < nr_secflavs; ++i) {
1a994408
CL		 726 if (xdr_stream_decode_u32(argp->xdr, &secflavor) < 0)
727 return nfserr_bad_xdr;
728 switch (secflavor) {
acb2887e 729 case RPC_AUTH_NULL:
1a994408 730 /* void */
12fc3e92
BF		 731 if (cbs->flavor == (u32)(-1))
732 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 733 break;
734 case RPC_AUTH_UNIX:
1a994408
CL		 735 status = nfsd4_decode_authsys_parms(argp, cbs);
736 if (status)
737 return status;
acb2887e
BF		 738 break;
739 case RPC_AUTH_GSS:
1a994408
CL		 740 status = nfsd4_decode_gss_cb_handles4(argp, cbs);
741 if (status)
742 return status;
acb2887e
BF		 743 break;
744 default:
acb2887e
BF		 745 return nfserr_inval;
746 }
747 }
1a994408
CL		 748
749 return nfs_ok;
acb2887e
BF		 750}
751
1a994408 752
d169a6a9
CL		 753/*
754 * NFSv4 operation argument decoders
755 */
756
757static __be32
758nfsd4_decode_access(struct nfsd4_compoundargs *argp,
759 struct nfsd4_access *access)
760{
761 if (xdr_stream_decode_u32(argp->xdr, &access->ac_req_access) < 0)
762 return nfserr_bad_xdr;
763 return nfs_ok;
764}
765
b37ad28b 766static __be32
1da177e4
LT		 767nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
768{
d3d2f381
CL		 769 if (xdr_stream_decode_u32(argp->xdr, &close->cl_seqid) < 0)
770 return nfserr_bad_xdr;
771 return nfsd4_decode_stateid4(argp, &close->cl_stateid);
1da177e4
LT		 772}
773
774
b37ad28b 775static __be32
1da177e4
LT		 776nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
777{
cbd9abb3
CL		 778 if (xdr_stream_decode_u64(argp->xdr, &commit->co_offset) < 0)
779 return nfserr_bad_xdr;
780 if (xdr_stream_decode_u32(argp->xdr, &commit->co_count) < 0)
781 return nfserr_bad_xdr;
782 return nfs_ok;
1da177e4
LT		 783}
784
b37ad28b 785static __be32
1da177e4
LT		 786nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
787{
000dfa18 788 __be32 *p, status;
1da177e4 789
000dfa18
CL		 790 if (xdr_stream_decode_u32(argp->xdr, &create->cr_type) < 0)
791 return nfserr_bad_xdr;
1da177e4
LT		 792 switch (create->cr_type) {
793 case NF4LNK:
000dfa18
CL		 794 if (xdr_stream_decode_u32(argp->xdr, &create->cr_datalen) < 0)
795 return nfserr_bad_xdr;
796 p = xdr_inline_decode(argp->xdr, create->cr_datalen);
797 if (!p)
798 return nfserr_bad_xdr;
29c353b3 799 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
7fb84306 800 if (!create->cr_data)
76f47128 801 return nfserr_jukebox;
1da177e4
LT		 802 break;
803 case NF4BLK:
804 case NF4CHR:
000dfa18
CL		 805 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata1) < 0)
806 return nfserr_bad_xdr;
807 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata2) < 0)
808 return nfserr_bad_xdr;
1da177e4
LT		 809 break;
810 case NF4SOCK:
811 case NF4FIFO:
812 case NF4DIR:
813 default:
814 break;
815 }
000dfa18
CL		 816 status = nfsd4_decode_component4(argp, &create->cr_name,
817 &create->cr_namelen);
818 if (status)
1da177e4 819 return status;
d1c263a0
CL		 820 status = nfsd4_decode_fattr4(argp, create->cr_bmval,
821 ARRAY_SIZE(create->cr_bmval),
822 &create->cr_iattr, &create->cr_acl,
823 &create->cr_label, &create->cr_umask);
c0d6fc8a 824 if (status)
000dfa18 825 return status;
1da177e4 826
000dfa18 827 return nfs_ok;
1da177e4
LT		 828}
829
b37ad28b 830static inline __be32
1da177e4
LT		 831nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
832{
95e6482c 833 return nfsd4_decode_stateid4(argp, &dr->dr_stateid);
1da177e4
LT		 834}
835
b37ad28b 836static inline __be32
1da177e4
LT		 837nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
838{
f759eff2
CL		 839 return nfsd4_decode_bitmap4(argp, getattr->ga_bmval,
840 ARRAY_SIZE(getattr->ga_bmval));
1da177e4
LT		 841}
842
b37ad28b 843static __be32
1da177e4
LT		 844nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
845{
5c505d12 846 return nfsd4_decode_component4(argp, &link->li_name, &link->li_namelen);
1da177e4
LT		 847}
848
8918cc0d
CL		 849static __be32
850nfsd4_decode_open_to_lock_owner4(struct nfsd4_compoundargs *argp,
851 struct nfsd4_lock *lock)
852{
853 __be32 status;
854
855 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_open_seqid) < 0)
856 return nfserr_bad_xdr;
857 status = nfsd4_decode_stateid4(argp, &lock->lk_new_open_stateid);
858 if (status)
859 return status;
860 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_lock_seqid) < 0)
861 return nfserr_bad_xdr;
862 return nfsd4_decode_state_owner4(argp, &lock->lk_new_clientid,
863 &lock->lk_new_owner);
864}
865
866static __be32
867nfsd4_decode_exist_lock_owner4(struct nfsd4_compoundargs *argp,
868 struct nfsd4_lock *lock)
869{
870 __be32 status;
871
872 status = nfsd4_decode_stateid4(argp, &lock->lk_old_lock_stateid);
873 if (status)
874 return status;
875 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_old_lock_seqid) < 0)
876 return nfserr_bad_xdr;
877
878 return nfs_ok;
879}
880
881static __be32
882nfsd4_decode_locker4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
883{
884 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_is_new) < 0)
885 return nfserr_bad_xdr;
886 if (lock->lk_is_new)
887 return nfsd4_decode_open_to_lock_owner4(argp, lock);
888 return nfsd4_decode_exist_lock_owner4(argp, lock);
889}
890
b37ad28b 891static __be32
1da177e4
LT		 892nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
893{
7c59deed
CL		 894 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_type) < 0)
895 return nfserr_bad_xdr;
1da177e4 896 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
7c59deed
CL		 897 return nfserr_bad_xdr;
898 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_reclaim) < 0)
899 return nfserr_bad_xdr;
900 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_offset) < 0)
901 return nfserr_bad_xdr;
902 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_length) < 0)
903 return nfserr_bad_xdr;
904 return nfsd4_decode_locker4(argp, lock);
1da177e4
LT		 905}
906
b37ad28b 907static __be32
1da177e4
LT		 908nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
909{
0a146f04
CL		 910 if (xdr_stream_decode_u32(argp->xdr, &lockt->lt_type) < 0)
911 return nfserr_bad_xdr;
912 if ((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
913 return nfserr_bad_xdr;
914 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_offset) < 0)
915 return nfserr_bad_xdr;
916 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_length) < 0)
917 return nfserr_bad_xdr;
918 return nfsd4_decode_state_owner4(argp, &lockt->lt_clientid,
919 &lockt->lt_owner);
1da177e4
LT		 920}
921
b37ad28b 922static __be32
1da177e4
LT		 923nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
924{
ca9cf9fc 925 __be32 status;
1da177e4 926
ca9cf9fc
CL		 927 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_type) < 0)
928 return nfserr_bad_xdr;
1da177e4 929 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
ca9cf9fc
CL		 930 return nfserr_bad_xdr;
931 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_seqid) < 0)
932 return nfserr_bad_xdr;
933 status = nfsd4_decode_stateid4(argp, &locku->lu_stateid);
e31a1b66
BH		 934 if (status)
935 return status;
ca9cf9fc
CL		 936 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_offset) < 0)
937 return nfserr_bad_xdr;
938 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_length) < 0)
939 return nfserr_bad_xdr;
1da177e4 940
ca9cf9fc 941 return nfs_ok;
1da177e4
LT		 942}
943
b37ad28b 944static __be32
1da177e4
LT		 945nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
946{
3d5877e8 947 return nfsd4_decode_component4(argp, &lookup->lo_name, &lookup->lo_len);
1da177e4
LT		 948}
949
bf33bab3
CL		 950static __be32
951nfsd4_decode_createhow4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
952{
953 __be32 status;
954
955 if (xdr_stream_decode_u32(argp->xdr, &open->op_createmode) < 0)
956 return nfserr_bad_xdr;
957 switch (open->op_createmode) {
958 case NFS4_CREATE_UNCHECKED:
959 case NFS4_CREATE_GUARDED:
960 status = nfsd4_decode_fattr4(argp, open->op_bmval,
961 ARRAY_SIZE(open->op_bmval),
962 &open->op_iattr, &open->op_acl,
963 &open->op_label, &open->op_umask);
964 if (status)
965 return status;
966 break;
967 case NFS4_CREATE_EXCLUSIVE:
968 status = nfsd4_decode_verifier4(argp, &open->op_verf);
969 if (status)
970 return status;
971 break;
972 case NFS4_CREATE_EXCLUSIVE4_1:
973 if (argp->minorversion < 1)
974 return nfserr_bad_xdr;
975 status = nfsd4_decode_verifier4(argp, &open->op_verf);
976 if (status)
977 return status;
978 status = nfsd4_decode_fattr4(argp, open->op_bmval,
979 ARRAY_SIZE(open->op_bmval),
980 &open->op_iattr, &open->op_acl,
981 &open->op_label, &open->op_umask);
982 if (status)
983 return status;
984 break;
985 default:
986 return nfserr_bad_xdr;
987 }
988
989 return nfs_ok;
990}
991
e6ec04b2
CL		 992static __be32
993nfsd4_decode_openflag4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
994{
995 __be32 status;
996
997 if (xdr_stream_decode_u32(argp->xdr, &open->op_create) < 0)
998 return nfserr_bad_xdr;
999 switch (open->op_create) {
1000 case NFS4_OPEN_NOCREATE:
1001 break;
1002 case NFS4_OPEN_CREATE:
1003 status = nfsd4_decode_createhow4(argp, open);
1004 if (status)
1005 return status;
1006 break;
1007 default:
1008 return nfserr_bad_xdr;
1009 }
1010
1011 return nfs_ok;
1012}
1013
2c8bd7e0 1014static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664 1015{
04f9e664
BF		 1016 u32 w;
1017
9aa62f51
CL		 1018 if (xdr_stream_decode_u32(argp->xdr, &w) < 0)
1019 return nfserr_bad_xdr;
2c8bd7e0
BH		 1020 *share_access = w & NFS4_SHARE_ACCESS_MASK;
1021 *deleg_want = w & NFS4_SHARE_WANT_MASK;
1022 if (deleg_when)
1023 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
1024
04f9e664
BF		 1025 switch (w & NFS4_SHARE_ACCESS_MASK) {
1026 case NFS4_SHARE_ACCESS_READ:
1027 case NFS4_SHARE_ACCESS_WRITE:
1028 case NFS4_SHARE_ACCESS_BOTH:
1029 break;
1030 default:
1031 return nfserr_bad_xdr;
1032 }
fc0d14fe 1033 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 1034 if (!w)
1035 return nfs_ok;
1036 if (!argp->minorversion)
1037 return nfserr_bad_xdr;
1038 switch (w & NFS4_SHARE_WANT_MASK) {
1039 case NFS4_SHARE_WANT_NO_PREFERENCE:
1040 case NFS4_SHARE_WANT_READ_DELEG:
1041 case NFS4_SHARE_WANT_WRITE_DELEG:
1042 case NFS4_SHARE_WANT_ANY_DELEG:
1043 case NFS4_SHARE_WANT_NO_DELEG:
1044 case NFS4_SHARE_WANT_CANCEL:
1045 break;
1046 default:
1047 return nfserr_bad_xdr;
1048 }
92bac8c5 1049 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 1050 if (!w)
1051 return nfs_ok;
2c8bd7e0
BH		 1052
1053 if (!deleg_when) /* open_downgrade */
1054 return nfserr_inval;
04f9e664
BF		 1055 switch (w) {
1056 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
1057 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 1058 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
1059 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 1060 return nfs_ok;
1061 }
04f9e664
BF		 1062 return nfserr_bad_xdr;
1063}
1064
1065static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
1066{
b07bebd9
CL		 1067 if (xdr_stream_decode_u32(argp->xdr, x) < 0)
1068 return nfserr_bad_xdr;
1069 /* Note: unlike access bits, deny bits may be zero. */
01cd4afa 1070 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664 1071 return nfserr_bad_xdr;
b07bebd9 1072
04f9e664 1073 return nfs_ok;
04f9e664
BF		 1074}
1075
1708e50b
CL		 1076static __be32
1077nfsd4_decode_open_claim4(struct nfsd4_compoundargs *argp,
1078 struct nfsd4_open *open)
1079{
1080 __be32 status;
1081
1082 if (xdr_stream_decode_u32(argp->xdr, &open->op_claim_type) < 0)
1083 return nfserr_bad_xdr;
1084 switch (open->op_claim_type) {
1085 case NFS4_OPEN_CLAIM_NULL:
1086 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1087 status = nfsd4_decode_component4(argp, &open->op_fname,
1088 &open->op_fnamelen);
1089 if (status)
1090 return status;
1091 break;
1092 case NFS4_OPEN_CLAIM_PREVIOUS:
1093 if (xdr_stream_decode_u32(argp->xdr, &open->op_delegate_type) < 0)
1094 return nfserr_bad_xdr;
1095 break;
1096 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1097 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1098 if (status)
1099 return status;
1100 status = nfsd4_decode_component4(argp, &open->op_fname,
1101 &open->op_fnamelen);
1102 if (status)
1103 return status;
1104 break;
1105 case NFS4_OPEN_CLAIM_FH:
1106 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1107 if (argp->minorversion < 1)
1108 return nfserr_bad_xdr;
1109 /* void */
1110 break;
1111 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1112 if (argp->minorversion < 1)
1113 return nfserr_bad_xdr;
1114 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1115 if (status)
1116 return status;
1117 break;
1118 default:
1119 return nfserr_bad_xdr;
1120 }
1121
1122 return nfs_ok;
1123}
1124
b37ad28b 1125static __be32
1da177e4
LT		 1126nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
1127{
61e5e0b3 1128 __be32 status;
2c8bd7e0 1129 u32 dummy;
1da177e4
LT		 1130
1131 memset(open->op_bmval, 0, sizeof(open->op_bmval));
1132 open->op_iattr.ia_valid = 0;
fe0750e5 1133 open->op_openowner = NULL;
1da177e4 1134
9d313b17 1135 open->op_xdr_error = 0;
61e5e0b3
CL		 1136 if (xdr_stream_decode_u32(argp->xdr, &open->op_seqid) < 0)
1137 return nfserr_bad_xdr;
1138 /* deleg_want is ignored */
2c8bd7e0
BH		 1139 status = nfsd4_decode_share_access(argp, &open->op_share_access,
1140 &open->op_deleg_want, &dummy);
04f9e664 1141 if (status)
61e5e0b3 1142 return status;
04f9e664
BF		 1143 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
1144 if (status)
61e5e0b3
CL		 1145 return status;
1146 status = nfsd4_decode_state_owner4(argp, &open->op_clientid,
1147 &open->op_owner);
a084daf5 1148 if (status)
61e5e0b3 1149 return status;
e6ec04b2
CL		 1150 status = nfsd4_decode_openflag4(argp, open);
1151 if (status)
1152 return status;
61e5e0b3 1153 return nfsd4_decode_open_claim4(argp, open);
1da177e4
LT		 1154}
1155
b37ad28b 1156static __be32
1da177e4
LT		 1157nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1158{
06bee693 1159 __be32 status;
e1a90ebd
AS		 1160
1161 if (argp->minorversion >= 1)
1162 return nfserr_notsupp;
1163
06bee693 1164 status = nfsd4_decode_stateid4(argp, &open_conf->oc_req_stateid);
e31a1b66
BH		 1165 if (status)
1166 return status;
06bee693
CL		 1167 if (xdr_stream_decode_u32(argp->xdr, &open_conf->oc_seqid) < 0)
1168 return nfserr_bad_xdr;
e1a90ebd 1169
06bee693 1170 return nfs_ok;
1da177e4
LT		 1171}
1172
b37ad28b 1173static __be32
1da177e4
LT		 1174nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1175{
dca71651
CL		 1176 __be32 status;
1177
1178 status = nfsd4_decode_stateid4(argp, &open_down->od_stateid);
e31a1b66
BH		 1179 if (status)
1180 return status;
dca71651
CL		 1181 if (xdr_stream_decode_u32(argp->xdr, &open_down->od_seqid) < 0)
1182 return nfserr_bad_xdr;
1183 /* deleg_want is ignored */
2c8bd7e0
BH		 1184 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1185 &open_down->od_deleg_want, NULL);
04f9e664
BF		 1186 if (status)
1187 return status;
dca71651 1188 return nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1da177e4
LT		 1189}
1190
b37ad28b 1191static __be32
1da177e4
LT		 1192nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1193{
a73bed98 1194 __be32 *p;
1da177e4 1195
a73bed98
CL		 1196 if (xdr_stream_decode_u32(argp->xdr, &putfh->pf_fhlen) < 0)
1197 return nfserr_bad_xdr;
1da177e4 1198 if (putfh->pf_fhlen > NFS4_FHSIZE)
a73bed98
CL		 1199 return nfserr_bad_xdr;
1200 p = xdr_inline_decode(argp->xdr, putfh->pf_fhlen);
1201 if (!p)
1202 return nfserr_bad_xdr;
1203 putfh->pf_fhval = svcxdr_tmpalloc(argp, putfh->pf_fhlen);
1204 if (!putfh->pf_fhval)
1205 return nfserr_jukebox;
1206 memcpy(putfh->pf_fhval, p, putfh->pf_fhlen);
1da177e4 1207
a73bed98 1208 return nfs_ok;
1da177e4
LT		 1209}
1210
e1a90ebd
AS		 1211static __be32
1212nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1213{
1214 if (argp->minorversion == 0)
1215 return nfs_ok;
1216 return nfserr_notsupp;
1217}
1218
b37ad28b 1219static __be32
1da177e4
LT		 1220nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1221{
3909c3bc 1222 __be32 status;
1da177e4 1223
3909c3bc 1224 status = nfsd4_decode_stateid4(argp, &read->rd_stateid);
e31a1b66
BH		 1225 if (status)
1226 return status;
3909c3bc
CL		 1227 if (xdr_stream_decode_u64(argp->xdr, &read->rd_offset) < 0)
1228 return nfserr_bad_xdr;
1229 if (xdr_stream_decode_u32(argp->xdr, &read->rd_length) < 0)
1230 return nfserr_bad_xdr;
1da177e4 1231
3909c3bc 1232 return nfs_ok;
1da177e4
LT		 1233}
1234
b37ad28b 1235static __be32
1da177e4
LT		 1236nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1237{
0dfaf2a3 1238 __be32 status;
1da177e4 1239
0dfaf2a3
CL		 1240 if (xdr_stream_decode_u64(argp->xdr, &readdir->rd_cookie) < 0)
1241 return nfserr_bad_xdr;
1242 status = nfsd4_decode_verifier4(argp, &readdir->rd_verf);
1243 if (status)
1244 return status;
1245 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_dircount) < 0)
1246 return nfserr_bad_xdr;
1247 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_maxcount) < 0)
1248 return nfserr_bad_xdr;
1249 if (xdr_stream_decode_uint32_array(argp->xdr, readdir->rd_bmval,
1250 ARRAY_SIZE(readdir->rd_bmval)) < 0)
1251 return nfserr_bad_xdr;
1da177e4 1252
0dfaf2a3 1253 return nfs_ok;
1da177e4
LT		 1254}
1255
b37ad28b 1256static __be32
1da177e4
LT		 1257nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1258{
b7f5fbf2 1259 return nfsd4_decode_component4(argp, &remove->rm_name, &remove->rm_namelen);
1da177e4
LT		 1260}
1261
b37ad28b 1262static __be32
1da177e4
LT		 1263nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1264{
ba881a0a 1265 __be32 status;
1da177e4 1266
ba881a0a
CL		 1267 status = nfsd4_decode_component4(argp, &rename->rn_sname, &rename->rn_snamelen);
1268 if (status)
1da177e4 1269 return status;
ba881a0a 1270 return nfsd4_decode_component4(argp, &rename->rn_tname, &rename->rn_tnamelen);
1da177e4
LT		 1271}
1272
b37ad28b 1273static __be32
1da177e4
LT		 1274nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1275{
d12f9045 1276 return nfsd4_decode_clientid4(argp, clientid);
1da177e4
LT		 1277}
1278
dcb488a3
AA		 1279static __be32
1280nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1281 struct nfsd4_secinfo *secinfo)
1282{
d0abdae5 1283 return nfsd4_decode_component4(argp, &secinfo->si_name, &secinfo->si_namelen);
dcb488a3
AA		 1284}
1285
b37ad28b 1286static __be32
1da177e4
LT		 1287nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1288{
e31a1b66 1289 __be32 status;
1da177e4 1290
44592fe9 1291 status = nfsd4_decode_stateid4(argp, &setattr->sa_stateid);
e31a1b66
BH		 1292 if (status)
1293 return status;
d1c263a0
CL		 1294 return nfsd4_decode_fattr4(argp, setattr->sa_bmval,
1295 ARRAY_SIZE(setattr->sa_bmval),
1296 &setattr->sa_iattr, &setattr->sa_acl,
1297 &setattr->sa_label, NULL);
1da177e4
LT		 1298}
1299
b37ad28b 1300static __be32
1da177e4
LT		 1301nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1302{
92fa6c08 1303 __be32 *p, status;
1da177e4 1304
e1a90ebd
AS		 1305 if (argp->minorversion >= 1)
1306 return nfserr_notsupp;
1307
92fa6c08
CL		 1308 status = nfsd4_decode_verifier4(argp, &setclientid->se_verf);
1309 if (status)
1310 return status;
a084daf5
BF		 1311 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1312 if (status)
92fa6c08
CL		 1313 return status;
1314 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_prog) < 0)
a084daf5 1315 return nfserr_bad_xdr;
92fa6c08
CL		 1316 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_netid_len) < 0)
1317 return nfserr_bad_xdr;
1318 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_netid_len);
1319 if (!p)
1320 return nfserr_bad_xdr;
1321 setclientid->se_callback_netid_val = svcxdr_tmpalloc(argp,
1322 setclientid->se_callback_netid_len);
1323 if (!setclientid->se_callback_netid_val)
1324 return nfserr_jukebox;
1325 memcpy(setclientid->se_callback_netid_val, p,
1326 setclientid->se_callback_netid_len);
1da177e4 1327
92fa6c08
CL		 1328 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_addr_len) < 0)
1329 return nfserr_bad_xdr;
1330 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_addr_len);
1331 if (!p)
1332 return nfserr_bad_xdr;
1333 setclientid->se_callback_addr_val = svcxdr_tmpalloc(argp,
1334 setclientid->se_callback_addr_len);
1335 if (!setclientid->se_callback_addr_val)
1336 return nfserr_jukebox;
1337 memcpy(setclientid->se_callback_addr_val, p,
1338 setclientid->se_callback_addr_len);
1339 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_ident) < 0)
1340 return nfserr_bad_xdr;
1da177e4 1341
92fa6c08 1342 return nfs_ok;
1da177e4
LT		 1343}
1344
b37ad28b 1345static __be32
1da177e4
LT		 1346nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1347{
d1ca5514 1348 __be32 status;
1da177e4 1349
e1a90ebd
AS		 1350 if (argp->minorversion >= 1)
1351 return nfserr_notsupp;
1352
d1ca5514
CL		 1353 status = nfsd4_decode_clientid4(argp, &scd_c->sc_clientid);
1354 if (status)
1355 return status;
1356 return nfsd4_decode_verifier4(argp, &scd_c->sc_confirm);
1da177e4
LT		 1357}
1358
1359/* Also used for NVERIFY */
b37ad28b 1360static __be32
1da177e4
LT		 1361nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1362{
67cd453e 1363 __be32 *p, status;
1da177e4 1364
67cd453e
CL		 1365 status = nfsd4_decode_bitmap4(argp, verify->ve_bmval,
1366 ARRAY_SIZE(verify->ve_bmval));
1367 if (status)
1368 return status;
1da177e4
LT		 1369
1370 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1371 * nfsd4_proc_verify */
1372
67cd453e
CL		 1373 if (xdr_stream_decode_u32(argp->xdr, &verify->ve_attrlen) < 0)
1374 return nfserr_bad_xdr;
1375 p = xdr_inline_decode(argp->xdr, verify->ve_attrlen);
1376 if (!p)
1377 return nfserr_bad_xdr;
1378 verify->ve_attrval = svcxdr_tmpalloc(argp, verify->ve_attrlen);
1379 if (!verify->ve_attrval)
1380 return nfserr_jukebox;
1381 memcpy(verify->ve_attrval, p, verify->ve_attrlen);
1da177e4 1382
67cd453e 1383 return nfs_ok;
1da177e4
LT		 1384}
1385
b37ad28b 1386static __be32
1da177e4
LT		 1387nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1388{
244e2bef 1389 __be32 status;
1da177e4 1390
244e2bef 1391 status = nfsd4_decode_stateid4(argp, &write->wr_stateid);
e31a1b66
BH		 1392 if (status)
1393 return status;
244e2bef
CL		 1394 if (xdr_stream_decode_u64(argp->xdr, &write->wr_offset) < 0)
1395 return nfserr_bad_xdr;
1396 if (xdr_stream_decode_u32(argp->xdr, &write->wr_stable_how) < 0)
1397 return nfserr_bad_xdr;
54bbb7d2 1398 if (write->wr_stable_how > NFS_FILE_SYNC)
244e2bef
CL		 1399 return nfserr_bad_xdr;
1400 if (xdr_stream_decode_u32(argp->xdr, &write->wr_buflen) < 0)
1401 return nfserr_bad_xdr;
c1346a12 1402 if (!xdr_stream_subsegment(argp->xdr, &write->wr_payload, write->wr_buflen))
244e2bef 1403 return nfserr_bad_xdr;
1da177e4 1404
244e2bef 1405 return nfs_ok;
1da177e4
LT		 1406}
1407
b37ad28b 1408static __be32
1da177e4
LT		 1409nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1410{
a4a80c15 1411 __be32 status;
1da177e4 1412
e1a90ebd
AS		 1413 if (argp->minorversion >= 1)
1414 return nfserr_notsupp;
1415
a4a80c15
CL		 1416 status = nfsd4_decode_state_owner4(argp, &rlockowner->rl_clientid,
1417 &rlockowner->rl_owner);
1418 if (status)
1419 return status;
1da177e4 1420
60adfc50
AA		 1421 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1422 return nfserr_inval;
a4a80c15
CL		 1423
1424 return nfs_ok;
1da177e4
LT		 1425}
1426
0f81d960
CL		 1427static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
1428{
1429 if (xdr_stream_decode_u32(argp->xdr, &bc->bc_cb_program) < 0)
1430 return nfserr_bad_xdr;
1431 return nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
1432}
1433
571e0451
CL		 1434static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
1435{
1436 u32 use_conn_in_rdma_mode;
1437 __be32 status;
1438
1439 status = nfsd4_decode_sessionid4(argp, &bcts->sessionid);
1440 if (status)
1441 return status;
1442 if (xdr_stream_decode_u32(argp->xdr, &bcts->dir) < 0)
1443 return nfserr_bad_xdr;
1444 if (xdr_stream_decode_u32(argp->xdr, &use_conn_in_rdma_mode) < 0)
1445 return nfserr_bad_xdr;
1446
1447 return nfs_ok;
1448}
1449
2548aa78
CL		 1450static __be32
1451nfsd4_decode_state_protect_ops(struct nfsd4_compoundargs *argp,
1452 struct nfsd4_exchange_id *exid)
1453{
1454 __be32 status;
1455
1456 status = nfsd4_decode_bitmap4(argp, exid->spo_must_enforce,
1457 ARRAY_SIZE(exid->spo_must_enforce));
1458 if (status)
1459 return nfserr_bad_xdr;
1460 status = nfsd4_decode_bitmap4(argp, exid->spo_must_allow,
1461 ARRAY_SIZE(exid->spo_must_allow));
1462 if (status)
1463 return nfserr_bad_xdr;
1464
1465 return nfs_ok;
1466}
1467
547bfeb4
CL		 1468/*
1469 * This implementation currently does not support SP4_SSV.
1470 * This decoder simply skips over these arguments.
1471 */
1472static noinline __be32
1473nfsd4_decode_ssv_sp_parms(struct nfsd4_compoundargs *argp,
1474 struct nfsd4_exchange_id *exid)
1475{
1476 u32 count, window, num_gss_handles;
1477 __be32 status;
1478
1479 /* ssp_ops */
1480 status = nfsd4_decode_state_protect_ops(argp, exid);
1481 if (status)
1482 return status;
1483
1484 /* ssp_hash_algs<> */
1485 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1486 return nfserr_bad_xdr;
1487 while (count--) {
1488 status = nfsd4_decode_ignored_string(argp, 0);
1489 if (status)
1490 return status;
1491 }
1492
1493 /* ssp_encr_algs<> */
1494 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1495 return nfserr_bad_xdr;
1496 while (count--) {
1497 status = nfsd4_decode_ignored_string(argp, 0);
1498 if (status)
1499 return status;
1500 }
1501
1502 if (xdr_stream_decode_u32(argp->xdr, &window) < 0)
1503 return nfserr_bad_xdr;
1504 if (xdr_stream_decode_u32(argp->xdr, &num_gss_handles) < 0)
1505 return nfserr_bad_xdr;
1506
1507 return nfs_ok;
1508}
1509
2db134eb 1510static __be32
523ec6ed
CL		 1511nfsd4_decode_state_protect4_a(struct nfsd4_compoundargs *argp,
1512 struct nfsd4_exchange_id *exid)
2db134eb 1513{
523ec6ed 1514 __be32 status;
0733d213 1515
523ec6ed 1516 if (xdr_stream_decode_u32(argp->xdr, &exid->spa_how) < 0)
a084daf5 1517 return nfserr_bad_xdr;
0733d213
AA		 1518 switch (exid->spa_how) {
1519 case SP4_NONE:
1520 break;
1521 case SP4_MACH_CRED:
2548aa78 1522 status = nfsd4_decode_state_protect_ops(argp, exid);
ed941643 1523 if (status)
2548aa78 1524 return status;
0733d213
AA		 1525 break;
1526 case SP4_SSV:
547bfeb4 1527 status = nfsd4_decode_ssv_sp_parms(argp, exid);
2548aa78
CL		 1528 if (status)
1529 return status;
0733d213
AA		 1530 break;
1531 default:
523ec6ed 1532 return nfserr_bad_xdr;
0733d213
AA		 1533 }
1534
523ec6ed
CL		 1535 return nfs_ok;
1536}
1537
10ff8422
CL		 1538static __be32
1539nfsd4_decode_nfs_impl_id4(struct nfsd4_compoundargs *argp,
1540 struct nfsd4_exchange_id *exid)
1541{
1542 __be32 status;
1543 u32 count;
1544
1545 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1546 return nfserr_bad_xdr;
1547 switch (count) {
1548 case 0:
1549 break;
1550 case 1:
1551 /* Note that RFC 8881 places no length limit on
1552 * nii_domain, but this implementation permits no
1553 * more than NFS4_OPAQUE_LIMIT bytes */
1554 status = nfsd4_decode_opaque(argp, &exid->nii_domain);
1555 if (status)
1556 return status;
1557 /* Note that RFC 8881 places no length limit on
1558 * nii_name, but this implementation permits no
1559 * more than NFS4_OPAQUE_LIMIT bytes */
1560 status = nfsd4_decode_opaque(argp, &exid->nii_name);
1561 if (status)
1562 return status;
1563 status = nfsd4_decode_nfstime4(argp, &exid->nii_time);
1564 if (status)
1565 return status;
1566 break;
1567 default:
1568 return nfserr_bad_xdr;
1569 }
1570
1571 return nfs_ok;
1572}
1573
523ec6ed
CL		 1574static __be32
1575nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1576 struct nfsd4_exchange_id *exid)
1577{
10ff8422 1578 __be32 status;
523ec6ed
CL		 1579
1580 status = nfsd4_decode_verifier4(argp, &exid->verifier);
1581 if (status)
1582 return status;
1583 status = nfsd4_decode_opaque(argp, &exid->clname);
1584 if (status)
1585 return status;
1586 if (xdr_stream_decode_u32(argp->xdr, &exid->flags) < 0)
1587 return nfserr_bad_xdr;
1588 status = nfsd4_decode_state_protect4_a(argp, exid);
1589 if (status)
1590 return status;
10ff8422 1591 return nfsd4_decode_nfs_impl_id4(argp, exid);
2db134eb
AA		 1592}
1593
3a3f1fba
CL		 1594static __be32
1595nfsd4_decode_channel_attrs4(struct nfsd4_compoundargs *argp,
1596 struct nfsd4_channel_attrs *ca)
1597{
1598 __be32 *p;
1599
1600 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 7);
1601 if (!p)
1602 return nfserr_bad_xdr;
1603
1604 /* headerpadsz is ignored */
1605 p++;
1606 ca->maxreq_sz = be32_to_cpup(p++);
1607 ca->maxresp_sz = be32_to_cpup(p++);
1608 ca->maxresp_cached = be32_to_cpup(p++);
1609 ca->maxops = be32_to_cpup(p++);
1610 ca->maxreqs = be32_to_cpup(p++);
1611 ca->nr_rdma_attrs = be32_to_cpup(p);
1612 switch (ca->nr_rdma_attrs) {
1613 case 0:
1614 break;
1615 case 1:
1616 if (xdr_stream_decode_u32(argp->xdr, &ca->rdma_attrs) < 0)
1617 return nfserr_bad_xdr;
1618 break;
1619 default:
1620 return nfserr_bad_xdr;
1621 }
1622
1623 return nfs_ok;
1624}
1625
2db134eb
AA		 1626static __be32
1627nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1628 struct nfsd4_create_session *sess)
1629{
81243e3f 1630 __be32 status;
ec6b5d7b 1631
81243e3f
CL		 1632 status = nfsd4_decode_clientid4(argp, &sess->clientid);
1633 if (status)
1634 return status;
1635 if (xdr_stream_decode_u32(argp->xdr, &sess->seqid) < 0)
1636 return nfserr_bad_xdr;
1637 if (xdr_stream_decode_u32(argp->xdr, &sess->flags) < 0)
1638 return nfserr_bad_xdr;
3a3f1fba
CL		 1639 status = nfsd4_decode_channel_attrs4(argp, &sess->fore_channel);
1640 if (status)
1641 return status;
1642 status = nfsd4_decode_channel_attrs4(argp, &sess->back_channel);
81243e3f
CL		 1643 if (status)
1644 return status;
1645 if (xdr_stream_decode_u32(argp->xdr, &sess->callback_prog) < 0)
1646 return nfserr_bad_xdr;
1647 status = nfsd4_decode_cb_sec(argp, &sess->cb_sec);
3a3f1fba
CL		 1648 if (status)
1649 return status;
ec6b5d7b 1650
81243e3f 1651 return nfs_ok;
2db134eb
AA		 1652}
1653
1654static __be32
1655nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1656 struct nfsd4_destroy_session *destroy_session)
1657{
94e254af 1658 return nfsd4_decode_sessionid4(argp, &destroy_session->sessionid);
2db134eb
AA		 1659}
1660
e1ca12df
BS		 1661static __be32
1662nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1663 struct nfsd4_free_stateid *free_stateid)
1664{
aec387d5 1665 return nfsd4_decode_stateid4(argp, &free_stateid->fr_stateid);
e1ca12df
BS		 1666}
1667
9cf514cc
CH		 1668#ifdef CONFIG_NFSD_PNFS
1669static __be32
1670nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1671 struct nfsd4_getdeviceinfo *gdev)
1672{
04495971
CL		 1673 __be32 status;
1674
1675 status = nfsd4_decode_deviceid4(argp, &gdev->gd_devid);
1676 if (status)
1677 return status;
1678 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_layout_type) < 0)
1679 return nfserr_bad_xdr;
1680 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_maxcount) < 0)
1681 return nfserr_bad_xdr;
1682 if (xdr_stream_decode_uint32_array(argp->xdr,
1683 &gdev->gd_notify_types, 1) < 0)
1684 return nfserr_bad_xdr;
1685
1686 return nfs_ok;
9cf514cc
CH		 1687}
1688
5185980d
CL		 1689static __be32
1690nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1691 struct nfsd4_layoutcommit *lcp)
1692{
1693 __be32 *p, status;
1694
1695 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.offset) < 0)
1696 return nfserr_bad_xdr;
1697 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.length) < 0)
1698 return nfserr_bad_xdr;
1699 if (xdr_stream_decode_bool(argp->xdr, &lcp->lc_reclaim) < 0)
1700 return nfserr_bad_xdr;
1701 status = nfsd4_decode_stateid4(argp, &lcp->lc_sid);
1702 if (status)
1703 return status;
1704 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_newoffset) < 0)
1705 return nfserr_bad_xdr;
1706 if (lcp->lc_newoffset) {
1707 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_last_wr) < 0)
1708 return nfserr_bad_xdr;
1709 } else
1710 lcp->lc_last_wr = 0;
1711 p = xdr_inline_decode(argp->xdr, XDR_UNIT);
1712 if (!p)
1713 return nfserr_bad_xdr;
1714 if (xdr_item_is_present(p)) {
1715 status = nfsd4_decode_nfstime4(argp, &lcp->lc_mtime);
1716 if (status)
1717 return status;
1718 } else {
1719 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1720 }
1721 return nfsd4_decode_layoutupdate4(argp, lcp);
1722}
1723
9cf514cc
CH		 1724static __be32
1725nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1726 struct nfsd4_layoutget *lgp)
1727{
c8e88e3a 1728 __be32 status;
db59c0ef 1729
c8e88e3a
CL		 1730 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_signal) < 0)
1731 return nfserr_bad_xdr;
1732 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_layout_type) < 0)
1733 return nfserr_bad_xdr;
1734 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_seg.iomode) < 0)
1735 return nfserr_bad_xdr;
1736 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.offset) < 0)
1737 return nfserr_bad_xdr;
1738 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.length) < 0)
1739 return nfserr_bad_xdr;
1740 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_minlength) < 0)
1741 return nfserr_bad_xdr;
1742 status = nfsd4_decode_stateid4(argp, &lgp->lg_sid);
db59c0ef
KM		 1743 if (status)
1744 return status;
c8e88e3a
CL		 1745 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_maxcount) < 0)
1746 return nfserr_bad_xdr;
db59c0ef 1747
c8e88e3a 1748 return nfs_ok;
9cf514cc
CH		 1749}
1750
9cf514cc
CH		 1751static __be32
1752nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1753 struct nfsd4_layoutreturn *lrp)
1754{
645fcad3
CL		 1755 if (xdr_stream_decode_bool(argp->xdr, &lrp->lr_reclaim) < 0)
1756 return nfserr_bad_xdr;
1757 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_layout_type) < 0)
1758 return nfserr_bad_xdr;
1759 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_seg.iomode) < 0)
1760 return nfserr_bad_xdr;
1761 return nfsd4_decode_layoutreturn4(argp, lrp);
9cf514cc
CH		 1762}
1763#endif /* CONFIG_NFSD_PNFS */
1764
53d70873
CL		 1765static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1766 struct nfsd4_secinfo_no_name *sin)
1767{
1768 if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0)
1769 return nfserr_bad_xdr;
1770 return nfs_ok;
1771}
1772
cf907b11
CL		 1773static __be32
1774nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1775 struct nfsd4_sequence *seq)
1776{
1777 __be32 *p, status;
1778
1779 status = nfsd4_decode_sessionid4(argp, &seq->sessionid);
1780 if (status)
1781 return status;
1782 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 4);
1783 if (!p)
1784 return nfserr_bad_xdr;
1785 seq->seqid = be32_to_cpup(p++);
1786 seq->slotid = be32_to_cpup(p++);
1787 seq->maxslots = be32_to_cpup(p++);
1788 seq->cachethis = be32_to_cpup(p);
1789
1790 return nfs_ok;
1791}
1792
b7a0c8f6
CL		 1793static __be32
1794nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1795{
1796 struct nfsd4_test_stateid_id *stateid;
1797 __be32 status;
1798 u32 i;
1799
1800 if (xdr_stream_decode_u32(argp->xdr, &test_stateid->ts_num_ids) < 0)
1801 return nfserr_bad_xdr;
1802
1803 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1804 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1805 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1806 if (!stateid)
1807 return nfserrno(-ENOMEM); /* XXX: not jukebox? */
1808 INIT_LIST_HEAD(&stateid->ts_id_list);
1809 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1810 status = nfsd4_decode_stateid4(argp, &stateid->ts_id_stateid);
1811 if (status)
1812 return status;
1813 }
1814
1815 return nfs_ok;
1816}
1817
c95f2ec3
CL		 1818static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp,
1819 struct nfsd4_destroy_clientid *dc)
1820{
1821 return nfsd4_decode_clientid4(argp, &dc->clientid);
1822}
1823
0d646784
CL		 1824static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp,
1825 struct nfsd4_reclaim_complete *rc)
1826{
1827 if (xdr_stream_decode_bool(argp->xdr, &rc->rca_one_fs) < 0)
1828 return nfserr_bad_xdr;
1829 return nfs_ok;
1830}
1831
95d871f0
AS		 1832static __be32
1833nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1834 struct nfsd4_fallocate *fallocate)
1835{
6aef27aa 1836 __be32 status;
95d871f0 1837
6aef27aa 1838 status = nfsd4_decode_stateid4(argp, &fallocate->falloc_stateid);
95d871f0
AS		 1839 if (status)
1840 return status;
6aef27aa
CL		 1841 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_offset) < 0)
1842 return nfserr_bad_xdr;
1843 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_length) < 0)
1844 return nfserr_bad_xdr;
95d871f0 1845
6aef27aa 1846 return nfs_ok;
95d871f0
AS		 1847}
1848
84e1b21d
OK		 1849static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
1850 struct nl4_server *ns)
1851{
84e1b21d 1852 struct nfs42_netaddr *naddr;
f49e4b4d 1853 __be32 *p;
84e1b21d 1854
f49e4b4d
CL		 1855 if (xdr_stream_decode_u32(argp->xdr, &ns->nl4_type) < 0)
1856 return nfserr_bad_xdr;
84e1b21d
OK		 1857
1858 /* currently support for 1 inter-server source server */
1859 switch (ns->nl4_type) {
1860 case NL4_NETADDR:
1861 naddr = &ns->u.nl4_addr;
1862
f49e4b4d
CL		 1863 if (xdr_stream_decode_u32(argp->xdr, &naddr->netid_len) < 0)
1864 return nfserr_bad_xdr;
84e1b21d 1865 if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
f49e4b4d 1866 return nfserr_bad_xdr;
84e1b21d 1867
f49e4b4d
CL		 1868 p = xdr_inline_decode(argp->xdr, naddr->netid_len);
1869 if (!p)
1870 return nfserr_bad_xdr;
1871 memcpy(naddr->netid, p, naddr->netid_len);
84e1b21d 1872
f49e4b4d
CL		 1873 if (xdr_stream_decode_u32(argp->xdr, &naddr->addr_len) < 0)
1874 return nfserr_bad_xdr;
84e1b21d 1875 if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
f49e4b4d 1876 return nfserr_bad_xdr;
84e1b21d 1877
f49e4b4d
CL		 1878 p = xdr_inline_decode(argp->xdr, naddr->addr_len);
1879 if (!p)
1880 return nfserr_bad_xdr;
1881 memcpy(naddr->addr, p, naddr->addr_len);
84e1b21d
OK		 1882 break;
1883 default:
f49e4b4d 1884 return nfserr_bad_xdr;
84e1b21d 1885 }
f49e4b4d
CL		 1886
1887 return nfs_ok;
84e1b21d
OK		 1888}
1889
29ae7f9d
AS		 1890static __be32
1891nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1892{
84e1b21d 1893 struct nl4_server *ns_dummy;
e8febea7
CL		 1894 u32 consecutive, i, count;
1895 __be32 status;
29ae7f9d 1896
e8febea7 1897 status = nfsd4_decode_stateid4(argp, &copy->cp_src_stateid);
29ae7f9d
AS		 1898 if (status)
1899 return status;
e8febea7 1900 status = nfsd4_decode_stateid4(argp, &copy->cp_dst_stateid);
29ae7f9d
AS		 1901 if (status)
1902 return status;
e8febea7
CL		 1903 if (xdr_stream_decode_u64(argp->xdr, &copy->cp_src_pos) < 0)
1904 return nfserr_bad_xdr;
1905 if (xdr_stream_decode_u64(argp->xdr, &copy->cp_dst_pos) < 0)
1906 return nfserr_bad_xdr;
1907 if (xdr_stream_decode_u64(argp->xdr, &copy->cp_count) < 0)
1908 return nfserr_bad_xdr;
1909 /* ca_consecutive: we always do consecutive copies */
1910 if (xdr_stream_decode_u32(argp->xdr, &consecutive) < 0)
1911 return nfserr_bad_xdr;
1912 if (xdr_stream_decode_u32(argp->xdr, &copy->cp_synchronous) < 0)
1913 return nfserr_bad_xdr;
29ae7f9d 1914
e8febea7
CL		 1915 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1916 return nfserr_bad_xdr;
84e1b21d
OK		 1917 copy->cp_intra = false;
1918 if (count == 0) { /* intra-server copy */
1919 copy->cp_intra = true;
e8febea7 1920 return nfs_ok;
84e1b21d
OK		 1921 }
1922
e8febea7 1923 /* decode all the supplied server addresses but use only the first */
84e1b21d
OK		 1924 status = nfsd4_decode_nl4_server(argp, &copy->cp_src);
1925 if (status)
1926 return status;
1927
1928 ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
1929 if (ns_dummy == NULL)
e8febea7 1930 return nfserrno(-ENOMEM); /* XXX: jukebox? */
84e1b21d
OK		 1931 for (i = 0; i < count - 1; i++) {
1932 status = nfsd4_decode_nl4_server(argp, ns_dummy);
1933 if (status) {
1934 kfree(ns_dummy);
1935 return status;
1936 }
1937 }
1938 kfree(ns_dummy);
29ae7f9d 1939
e8febea7 1940 return nfs_ok;
29ae7f9d
AS		 1941}
1942
51911868
OK		 1943static __be32
1944nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
1945 struct nfsd4_copy_notify *cn)
1946{
5aff7d08 1947 __be32 status;
51911868 1948
f9a953fb 1949 status = nfsd4_decode_stateid4(argp, &cn->cpn_src_stateid);
51911868
OK		 1950 if (status)
1951 return status;
1952 return nfsd4_decode_nl4_server(argp, &cn->cpn_dst);
1953}
1954
f9a953fb
CL		 1955static __be32
1956nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
1957 struct nfsd4_offload_status *os)
1958{
2846bb05 1959 return nfsd4_decode_stateid4(argp, &os->stateid);
f9a953fb
CL		 1960}
1961
24bab491
AS		 1962static __be32
1963nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1964{
9d32b412 1965 __be32 status;
24bab491 1966
9d32b412 1967 status = nfsd4_decode_stateid4(argp, &seek->seek_stateid);
24bab491
AS		 1968 if (status)
1969 return status;
9d32b412
CL		 1970 if (xdr_stream_decode_u64(argp->xdr, &seek->seek_offset) < 0)
1971 return nfserr_bad_xdr;
1972 if (xdr_stream_decode_u32(argp->xdr, &seek->seek_whence) < 0)
1973 return nfserr_bad_xdr;
24bab491 1974
9d32b412 1975 return nfs_ok;
24bab491
AS		 1976}
1977
3dfd0b0e
CL		 1978static __be32
1979nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1980{
1981 __be32 status;
1982
1983 status = nfsd4_decode_stateid4(argp, &clone->cl_src_stateid);
1984 if (status)
1985 return status;
1986 status = nfsd4_decode_stateid4(argp, &clone->cl_dst_stateid);
1987 if (status)
1988 return status;
1989 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_src_pos) < 0)
1990 return nfserr_bad_xdr;
1991 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_dst_pos) < 0)
1992 return nfserr_bad_xdr;
1993 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_count) < 0)
1994 return nfserr_bad_xdr;
1995
1996 return nfs_ok;
1997}
1998
23e50fe3
FL		 1999/*
2000 * XDR data that is more than PAGE_SIZE in size is normally part of a
2001 * read or write. However, the size of extended attributes is limited
2002 * by the maximum request size, and then further limited by the underlying
2003 * filesystem limits. This can exceed PAGE_SIZE (currently, XATTR_SIZE_MAX
2004 * is 64k). Since there is no kvec- or page-based interface to xattrs,
2005 * and we're not dealing with contiguous pages, we need to do some copying.
2006 */
2007
2008/*
c1346a12 2009 * Decode data into buffer.
23e50fe3
FL		 2010 */
2011static __be32
c1346a12
CL		 2012nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct xdr_buf *xdr,
2013 char **bufp, u32 buflen)
23e50fe3 2014{
c1346a12
CL		 2015 struct page **pages = xdr->pages;
2016 struct kvec *head = xdr->head;
23e50fe3
FL		 2017 char *tmp, *dp;
2018 u32 len;
2019
2020 if (buflen <= head->iov_len) {
2021 /*
2022 * We're in luck, the head has enough space. Just return
2023 * the head, no need for copying.
2024 */
2025 *bufp = head->iov_base;
2026 return 0;
2027 }
2028
2029 tmp = svcxdr_tmpalloc(argp, buflen);
2030 if (tmp == NULL)
2031 return nfserr_jukebox;
2032
2033 dp = tmp;
2034 memcpy(dp, head->iov_base, head->iov_len);
2035 buflen -= head->iov_len;
2036 dp += head->iov_len;
2037
2038 while (buflen > 0) {
2039 len = min_t(u32, buflen, PAGE_SIZE);
2040 memcpy(dp, page_address(*pages), len);
2041
2042 buflen -= len;
2043 dp += len;
2044 pages++;
2045 }
2046
2047 *bufp = tmp;
2048 return 0;
2049}
2050
2051/*
2052 * Get a user extended attribute name from the XDR buffer.
2053 * It will not have the "user." prefix, so prepend it.
2054 * Lastly, check for nul characters in the name.
2055 */
2056static __be32
2057nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep)
2058{
23e50fe3
FL		 2059 char *name, *sp, *dp;
2060 u32 namelen, cnt;
830c7150 2061 __be32 *p;
23e50fe3 2062
830c7150
CL		 2063 if (xdr_stream_decode_u32(argp->xdr, &namelen) < 0)
2064 return nfserr_bad_xdr;
23e50fe3
FL		 2065 if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN))
2066 return nfserr_nametoolong;
23e50fe3 2067 if (namelen == 0)
830c7150
CL		 2068 return nfserr_bad_xdr;
2069 p = xdr_inline_decode(argp->xdr, namelen);
2070 if (!p)
2071 return nfserr_bad_xdr;
23e50fe3
FL		 2072 name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1);
2073 if (!name)
2074 return nfserr_jukebox;
23e50fe3
FL		 2075 memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2076
2077 /*
2078 * Copy the extended attribute name over while checking for 0
2079 * characters.
2080 */
2081 sp = (char *)p;
2082 dp = name + XATTR_USER_PREFIX_LEN;
2083 cnt = namelen;
2084
2085 while (cnt-- > 0) {
2086 if (*sp == '\0')
830c7150 2087 return nfserr_bad_xdr;
23e50fe3
FL		 2088 *dp++ = *sp++;
2089 }
2090 *dp = '\0';
2091
2092 *namep = name;
2093
830c7150 2094 return nfs_ok;
23e50fe3
FL		 2095}
2096
2097/*
2098 * A GETXATTR op request comes without a length specifier. We just set the
2099 * maximum length for the reply based on XATTR_SIZE_MAX and the maximum
2100 * channel reply size. nfsd_getxattr will probe the length of the xattr,
2101 * check it against getxa_len, and allocate + return the value.
2102 */
2103static __be32
2104nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp,
2105 struct nfsd4_getxattr *getxattr)
2106{
2107 __be32 status;
2108 u32 maxcount;
2109
2110 status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name);
2111 if (status)
2112 return status;
2113
2114 maxcount = svc_max_payload(argp->rqstp);
2115 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2116
2117 getxattr->getxa_len = maxcount;
2118
2119 return status;
2120}
2121
2122static __be32
2123nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp,
2124 struct nfsd4_setxattr *setxattr)
2125{
23e50fe3 2126 u32 flags, maxcount, size;
403366a7 2127 __be32 status;
23e50fe3 2128
403366a7
CL		 2129 if (xdr_stream_decode_u32(argp->xdr, &flags) < 0)
2130 return nfserr_bad_xdr;
23e50fe3
FL		 2131
2132 if (flags > SETXATTR4_REPLACE)
2133 return nfserr_inval;
2134 setxattr->setxa_flags = flags;
2135
2136 status = nfsd4_decode_xattr_name(argp, &setxattr->setxa_name);
2137 if (status)
2138 return status;
2139
2140 maxcount = svc_max_payload(argp->rqstp);
2141 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2142
403366a7
CL		 2143 if (xdr_stream_decode_u32(argp->xdr, &size) < 0)
2144 return nfserr_bad_xdr;
23e50fe3
FL		 2145 if (size > maxcount)
2146 return nfserr_xattr2big;
2147
2148 setxattr->setxa_len = size;
2149 if (size > 0) {
c1346a12 2150 struct xdr_buf payload;
23e50fe3 2151
c1346a12 2152 if (!xdr_stream_subsegment(argp->xdr, &payload, size))
403366a7 2153 return nfserr_bad_xdr;
c1346a12
CL		 2154 status = nfsd4_vbuf_from_vector(argp, &payload,
2155 &setxattr->setxa_buf, size);
23e50fe3
FL		 2156 }
2157
403366a7 2158 return nfs_ok;
23e50fe3
FL		 2159}
2160
2161static __be32
2162nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp,
2163 struct nfsd4_listxattrs *listxattrs)
2164{
23e50fe3
FL		 2165 u32 maxcount;
2166
2212036c
CL		 2167 if (xdr_stream_decode_u64(argp->xdr, &listxattrs->lsxa_cookie) < 0)
2168 return nfserr_bad_xdr;
23e50fe3
FL		 2169
2170 /*
2171 * If the cookie is too large to have even one user.x attribute
2172 * plus trailing '\0' left in a maximum size buffer, it's invalid.
2173 */
2174 if (listxattrs->lsxa_cookie >=
2175 (XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2)))
2176 return nfserr_badcookie;
2177
2212036c
CL		 2178 if (xdr_stream_decode_u32(argp->xdr, &maxcount) < 0)
2179 return nfserr_bad_xdr;
23e50fe3
FL		 2180 if (maxcount < 8)
2181 /* Always need at least 2 words (length and one character) */
2182 return nfserr_inval;
2183
2184 maxcount = min(maxcount, svc_max_payload(argp->rqstp));
2185 listxattrs->lsxa_maxcount = maxcount;
2186
2212036c 2187 return nfs_ok;
23e50fe3
FL		 2188}
2189
2190static __be32
2191nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp,
2192 struct nfsd4_removexattr *removexattr)
2193{
2194 return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name);
2195}
2196
347e0ad9
BH		 2197static __be32
2198nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
2199{
2200 return nfs_ok;
2201}
2202
3c375c6f
BH		 2203static __be32
2204nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
2205{
1e685ec2 2206 return nfserr_notsupp;
3c375c6f
BH		 2207}
2208
347e0ad9
BH		 2209typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
2210
c1df609d 2211static const nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 2212 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
2213 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
2214 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
2215 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
2216 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
2217 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
2218 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
2219 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
2220 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
2221 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
2222 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
2223 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
2224 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
2225 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
2226 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2227 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
2228 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
2229 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
2230 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
2231 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 2232 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 2233 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
2234 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
2235 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
2236 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
2237 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
2238 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
2239 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
2240 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
2241 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
2242 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
2243 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
2244 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
2245 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
2246 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2247 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
2248 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 2249
2250 /* new operations for NFSv4.1 */
cb73a9f4 2251 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 2252 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 2253 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
2254 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
2255 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 2256 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae 2257 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc
CH		 2258#ifdef CONFIG_NFSD_PNFS
2259 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
2260 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2261 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
2262 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
2263 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
2264#else
9064caae
RD		 2265 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
2266 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2267 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
2268 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
2269 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc 2270#endif
04f4ad16 2271 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 2272 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
2273 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 2274 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 2275 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 2276 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 2277 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
87a15a80
AS		 2278
2279 /* new operations for NFSv4.2 */
95d871f0 2280 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
29ae7f9d 2281 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
51911868 2282 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_copy_notify,
b0cb9085 2283 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
87a15a80
AS		 2284 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
2285 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
2286 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
885e2bf3 2287 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status,
6308bc98 2288 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status,
528b8493 2289 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_read,
24bab491 2290 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
87a15a80 2291 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
ffa0160a 2292 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
23e50fe3
FL		 2293 /* RFC 8276 extended atributes operations */
2294 [OP_GETXATTR] = (nfsd4_dec)nfsd4_decode_getxattr,
2295 [OP_SETXATTR] = (nfsd4_dec)nfsd4_decode_setxattr,
2296 [OP_LISTXATTRS] = (nfsd4_dec)nfsd4_decode_listxattrs,
2297 [OP_REMOVEXATTR] = (nfsd4_dec)nfsd4_decode_removexattr,
2db134eb
AA		 2298};
2299
e1a90ebd
AS		 2300static inline bool
2301nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
2302{
8217d146 2303 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 2304 return false;
8217d146 2305 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 2306 return false;
8217d146
AS		 2307 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
2308 return false;
2309 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 2310 return false;
2311 return true;
2312}
f2feb96b 2313
d9b74bda 2314static int
1da177e4
LT		 2315nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
2316{
1da177e4 2317 struct nfsd4_op *op;
1091006c 2318 bool cachethis = false;
a5cddc88
BF		 2319 int auth_slack= argp->rqstp->rq_auth_slack;
2320 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 2321 int readcount = 0;
2322 int readbytes = 0;
d9b74bda 2323 __be32 *p;
1da177e4
LT		 2324 int i;
2325
d9b74bda
CL		 2326 if (xdr_stream_decode_u32(argp->xdr, &argp->taglen) < 0)
2327 return 0;
2328 max_reply += XDR_UNIT;
2329 argp->tag = NULL;
2330 if (unlikely(argp->taglen)) {
2331 if (argp->taglen > NFSD4_MAX_TAGLEN)
2332 return 0;
2333 p = xdr_inline_decode(argp->xdr, argp->taglen);
2334 if (!p)
2335 return 0;
2336 argp->tag = svcxdr_tmpalloc(argp, argp->taglen);
2337 if (!argp->tag)
2338 return 0;
2339 memcpy(argp->tag, p, argp->taglen);
2340 max_reply += xdr_align_size(argp->taglen);
2341 }
2342
2343 if (xdr_stream_decode_u32(argp->xdr, &argp->minorversion) < 0)
2344 return 0;
2345 if (xdr_stream_decode_u32(argp->xdr, &argp->opcnt) < 0)
2346 return 0;
2347
0078117c
BF		 2348 /*
2349 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
2350 * here, so we return success at the xdr level so that
2351 * nfsd4_proc can handle this is an NFS-level error.
2352 */
2353 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
d9b74bda 2354 return 1;
1da177e4 2355
e8c96f8c 2356 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
5d6031ca 2357 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1da177e4
LT		 2358 if (!argp->ops) {
2359 argp->ops = argp->iops;
817cb9d4 2360 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
d9b74bda 2361 return 0;
1da177e4
LT		 2362 }
2363 }
2364
e1a90ebd 2365 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 2366 argp->opcnt = 0;
2367
1da177e4
LT		 2368 for (i = 0; i < argp->opcnt; i++) {
2369 op = &argp->ops[i];
2370 op->replay = NULL;
2371
3a237b4a 2372 if (xdr_stream_decode_u32(argp->xdr, &op->opnum) < 0)
d9b74bda 2373 return 0;
08281341 2374 if (nfsd4_opnum_in_range(argp, op)) {
e1a90ebd 2375 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
08281341
CL		 2376 if (op->status != nfs_ok)
2377 trace_nfsd_compound_decode_err(argp->rqstp,
2378 argp->opcnt, i,
2379 op->opnum,
2380 op->status);
2381 } else {
1da177e4
LT		 2382 op->opnum = OP_ILLEGAL;
2383 op->status = nfserr_op_illegal;
1da177e4 2384 }
f4f9ef4a 2385 op->opdesc = OPDESC(op);
1091006c
BF		 2386 /*
2387 * We'll try to cache the result in the DRC if any one
2388 * op in the compound wants to be cached:
2389 */
2390 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 2391
528b8493 2392 if (op->opnum == OP_READ || op->opnum == OP_READ_PLUS) {
b0e35fda
BF		 2393 readcount++;
2394 readbytes += nfsd4_max_reply(argp->rqstp, op);
2395 } else
2396 max_reply += nfsd4_max_reply(argp->rqstp, op);
f7b43d0c 2397 /*
7323f0d2
KM		 2398 * OP_LOCK and OP_LOCKT may return a conflicting lock.
2399 * (Special case because it will just skip encoding this
2400 * if it runs out of xdr buffer space, and it is the only
2401 * operation that behaves this way.)
f7b43d0c 2402 */
7323f0d2 2403 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
f7b43d0c 2404 max_reply += NFS4_OPAQUE_LIMIT;
e372ba60
BF		 2405
2406 if (op->status) {
2407 argp->opcnt = i+1;
2408 break;
2409 }
1da177e4 2410 }
1091006c
BF		 2411 /* Sessions make the DRC unnecessary: */
2412 if (argp->minorversion)
2413 cachethis = false;
b0e35fda 2414 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 2415 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 2416
a5cddc88 2417 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
779fb0f3 2418 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
b0e35fda 2419
d9b74bda 2420 return 1;
1da177e4 2421}
1da177e4 2422
b8800921
N		 2423static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
2424 struct svc_export *exp)
c654b8a9 2425{
b8800921
N		 2426 if (exp->ex_flags & NFSEXP_V4ROOT) {
2427 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
2428 *p++ = 0;
70b87f77 2429 } else
39ca1bf6 2430 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
d05d5744 2431 return p;
c654b8a9
BF		 2432}
2433
16945141
BF		 2434/*
2435 * ctime (in NFSv4, time_metadata) is not writeable, and the client
2436 * doesn't really care what resolution could theoretically be stored by
2437 * the filesystem.
2438 *
2439 * The client cares how close together changes can be while still
2440 * guaranteeing ctime changes. For most filesystems (which have
2441 * timestamps with nanosecond fields) that is limited by the resolution
2442 * of the time returned from current_time() (which I'm assuming to be
2443 * 1/HZ).
2444 */
2445static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
2446{
e4598e38 2447 struct timespec64 ts;
16945141
BF		 2448 u32 ns;
2449
2450 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
e4598e38 2451 ts = ns_to_timespec64(ns);
16945141
BF		 2452
2453 p = xdr_encode_hyper(p, ts.tv_sec);
2454 *p++ = cpu_to_be32(ts.tv_nsec);
2455
2456 return p;
2457}
2458
d05d5744 2459static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 2460{
d05d5744 2461 *p++ = cpu_to_be32(c->atomic);
b2140338
BF		 2462 p = xdr_encode_hyper(p, c->before_change);
2463 p = xdr_encode_hyper(p, c->after_change);
d05d5744 2464 return p;
c654b8a9 2465}
1da177e4 2466
81c3f413 2467/* Encode as an array of strings the string given with components
e7a0444a 2468 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 2469 */
ddd1ea56
BF		 2470static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2471 char *components, char esc_enter,
2472 char esc_exit)
81c3f413 2473{
ddd1ea56 2474 __be32 *p;
082d4bd7
BF		 2475 __be32 pathlen;
2476 int pathlen_offset;
81c3f413 2477 int strlen, count=0;
e7a0444a 2478 char *str, *end, *next;
81c3f413
BF		 2479
2480 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 2481
2482 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 2483 p = xdr_reserve_space(xdr, 4);
2484 if (!p)
81c3f413 2485 return nfserr_resource;
082d4bd7
BF		 2486 p++; /* We will fill this in with @count later */
2487
81c3f413
BF		 2488 end = str = components;
2489 while (*end) {
e7a0444a
WAA		 2490 bool found_esc = false;
2491
2492 /* try to parse as esc_start, ..., esc_end, sep */
2493 if (*str == esc_enter) {
2494 for (; *end && (*end != esc_exit); end++)
2495 /* find esc_exit or end of string */;
2496 next = end + 1;
2497 if (*end && (!*next || *next == sep)) {
2498 str++;
2499 found_esc = true;
2500 }
2501 }
2502
2503 if (!found_esc)
2504 for (; *end && (*end != sep); end++)
2505 /* find sep or end of string */;
2506
81c3f413
BF		 2507 strlen = end - str;
2508 if (strlen) {
ddd1ea56
BF		 2509 p = xdr_reserve_space(xdr, strlen + 4);
2510 if (!p)
81c3f413 2511 return nfserr_resource;
0c0c267b 2512 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 2513 count++;
2514 }
2515 else
2516 end++;
5a64e569
BC		 2517 if (found_esc)
2518 end = next;
2519
81c3f413
BF		 2520 str = end;
2521 }
bf7491f1 2522 pathlen = htonl(count);
082d4bd7 2523 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 2524 return 0;
2525}
2526
e7a0444a
WAA		 2527/* Encode as an array of strings the string given with components
2528 * separated @sep.
2529 */
ddd1ea56
BF		 2530static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2531 char *components)
e7a0444a 2532{
ddd1ea56 2533 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 2534}
2535
81c3f413
BF		 2536/*
2537 * encode a location element of a fs_locations structure
2538 */
ddd1ea56
BF		 2539static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2540 struct nfsd4_fs_location *location)
81c3f413 2541{
b37ad28b 2542 __be32 status;
81c3f413 2543
ddd1ea56 2544 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 2545 '[', ']');
81c3f413
BF		 2546 if (status)
2547 return status;
ddd1ea56 2548 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 2549 if (status)
2550 return status;
81c3f413
BF		 2551 return 0;
2552}
2553
2554/*
ed748aac 2555 * Encode a path in RFC3530 'pathname4' format
81c3f413 2556 */
ddd1ea56
BF		 2557static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2558 const struct path *root,
2559 const struct path *path)
81c3f413 2560{
301f0268 2561 struct path cur = *path;
ddd1ea56 2562 __be32 *p;
ed748aac
TM		 2563 struct dentry **components = NULL;
2564 unsigned int ncomponents = 0;
2565 __be32 err = nfserr_jukebox;
81c3f413 2566
ed748aac 2567 dprintk("nfsd4_encode_components(");
81c3f413 2568
ed748aac
TM		 2569 path_get(&cur);
2570 /* First walk the path up to the nfsd root, and store the
2571 * dentries/path components in an array.
2572 */
2573 for (;;) {
b77a4b2e 2574 if (path_equal(&cur, root))
ed748aac
TM		 2575 break;
2576 if (cur.dentry == cur.mnt->mnt_root) {
2577 if (follow_up(&cur))
2578 continue;
2579 goto out_free;
2580 }
2581 if ((ncomponents & 15) == 0) {
2582 struct dentry **new;
2583 new = krealloc(components,
2584 sizeof(*new) * (ncomponents + 16),
2585 GFP_KERNEL);
2586 if (!new)
2587 goto out_free;
2588 components = new;
2589 }
2590 components[ncomponents++] = cur.dentry;
2591 cur.dentry = dget_parent(cur.dentry);
2592 }
ddd1ea56
BF		 2593 err = nfserr_resource;
2594 p = xdr_reserve_space(xdr, 4);
2595 if (!p)
ed748aac 2596 goto out_free;
c373b0a4 2597 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 2598
2599 while (ncomponents) {
2600 struct dentry *dentry = components[ncomponents - 1];
301f0268 2601 unsigned int len;
ed748aac 2602
301f0268
AV		 2603 spin_lock(&dentry->d_lock);
2604 len = dentry->d_name.len;
ddd1ea56
BF		 2605 p = xdr_reserve_space(xdr, len + 4);
2606 if (!p) {
301f0268 2607 spin_unlock(&dentry->d_lock);
ed748aac 2608 goto out_free;
301f0268 2609 }
0c0c267b 2610 p = xdr_encode_opaque(p, dentry->d_name.name, len);
a455589f 2611 dprintk("/%pd", dentry);
301f0268 2612 spin_unlock(&dentry->d_lock);
ed748aac
TM		 2613 dput(dentry);
2614 ncomponents--;
81c3f413 2615 }
ed748aac 2616
ed748aac
TM		 2617 err = 0;
2618out_free:
2619 dprintk(")\n");
2620 while (ncomponents)
2621 dput(components[--ncomponents]);
2622 kfree(components);
2623 path_put(&cur);
2624 return err;
2625}
2626
ddd1ea56
BF		 2627static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2628 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 2629{
2630 struct svc_export *exp_ps;
2631 __be32 res;
2632
2633 exp_ps = rqst_find_fsidzero_export(rqstp);
2634 if (IS_ERR(exp_ps))
2635 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 2636 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 2637 exp_put(exp_ps);
2638 return res;
81c3f413
BF		 2639}
2640
2641/*
2642 * encode a fs_locations structure
2643 */
ddd1ea56
BF		 2644static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2645 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 2646{
b37ad28b 2647 __be32 status;
cc45f017 2648 int i;
ddd1ea56 2649 __be32 *p;
81c3f413 2650 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 2651
ddd1ea56 2652 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 2653 if (status)
2654 return status;
ddd1ea56
BF		 2655 p = xdr_reserve_space(xdr, 4);
2656 if (!p)
81c3f413 2657 return nfserr_resource;
c373b0a4 2658 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 2659 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 2660 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 2661 if (status)
2662 return status;
2663 }
81c3f413
BF		 2664 return 0;
2665}
1da177e4 2666
3d2544b1
BF		 2667static u32 nfs4_file_type(umode_t mode)
2668{
2669 switch (mode & S_IFMT) {
2670 case S_IFIFO: return NF4FIFO;
2671 case S_IFCHR: return NF4CHR;
2672 case S_IFDIR: return NF4DIR;
2673 case S_IFBLK: return NF4BLK;
2674 case S_IFLNK: return NF4LNK;
2675 case S_IFREG: return NF4REG;
2676 case S_IFSOCK: return NF4SOCK;
2677 default: return NF4BAD;
25fef48b 2678 }
3d2544b1 2679}
1da177e4 2680
b37ad28b 2681static inline __be32
ddd1ea56
BF		 2682nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2683 struct nfs4_ace *ace)
1da177e4 2684{
3554116d 2685 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 2686 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 2687 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 2688 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 2689 else
ddd1ea56 2690 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 2691}
2692
6896f15a 2693static inline __be32
8a4c3926 2694nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
6896f15a 2695{
8a4c3926
JL		 2696 __be32 *p;
2697 unsigned long i = hweight_long(layout_types);
6896f15a 2698
8a4c3926
JL		 2699 p = xdr_reserve_space(xdr, 4 + 4 * i);
2700 if (!p)
2701 return nfserr_resource;
2702
2703 *p++ = cpu_to_be32(i);
2704
2705 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2706 if (layout_types & (1 << i))
2707 *p++ = cpu_to_be32(i);
6896f15a
KM		 2708
2709 return 0;
2710}
2711
42ca0993
BF		 2712#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2713 FATTR4_WORD0_RDATTR_ERROR)
2714#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
c2227a39 2715#define WORD2_ABSENT_FS_ATTRS 0
42ca0993 2716
18032ca0
DQ		 2717#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2718static inline __be32
ddd1ea56
BF		 2719nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2720 void *context, int len)
18032ca0 2721{
ddd1ea56 2722 __be32 *p;
18032ca0 2723
ddd1ea56
BF		 2724 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2725 if (!p)
18032ca0
DQ		 2726 return nfserr_resource;
2727
2728 /*
2729 * For now we use a 0 here to indicate the null translation; in
2730 * the future we may place a call to translation code here.
2731 */
c373b0a4
BF		 2732 *p++ = cpu_to_be32(0); /* lfs */
2733 *p++ = cpu_to_be32(0); /* pi */
18032ca0 2734 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 2735 return 0;
2736}
2737#else
2738static inline __be32
ddd1ea56
BF		 2739nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2740 void *context, int len)
18032ca0
DQ		 2741{ return 0; }
2742#endif
2743
c2227a39 2744static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
42ca0993
BF		 2745{
2746 /* As per referral draft: */
2747 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2748 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2749 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2750 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2751 *rdattr_err = NFSERR_MOVED;
2752 else
2753 return nfserr_moved;
2754 }
2755 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2756 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
c2227a39 2757 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
42ca0993
BF		 2758 return 0;
2759}
1da177e4 2760
ae7095a7
BF		 2761
2762static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2763{
2764 struct path path = exp->ex_path;
2765 int err;
2766
2767 path_get(&path);
2768 while (follow_up(&path)) {
2769 if (path.dentry != path.mnt->mnt_root)
2770 break;
2771 }
a528d35e 2772 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
ae7095a7
BF		 2773 path_put(&path);
2774 return err;
2775}
2776
75976de6
KM		 2777static __be32
2778nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2779{
2780 __be32 *p;
2781
2782 if (bmval2) {
2783 p = xdr_reserve_space(xdr, 16);
2784 if (!p)
2785 goto out_resource;
2786 *p++ = cpu_to_be32(3);
2787 *p++ = cpu_to_be32(bmval0);
2788 *p++ = cpu_to_be32(bmval1);
2789 *p++ = cpu_to_be32(bmval2);
2790 } else if (bmval1) {
2791 p = xdr_reserve_space(xdr, 12);
2792 if (!p)
2793 goto out_resource;
2794 *p++ = cpu_to_be32(2);
2795 *p++ = cpu_to_be32(bmval0);
2796 *p++ = cpu_to_be32(bmval1);
2797 } else {
2798 p = xdr_reserve_space(xdr, 8);
2799 if (!p)
2800 goto out_resource;
2801 *p++ = cpu_to_be32(1);
2802 *p++ = cpu_to_be32(bmval0);
2803 }
2804
2805 return 0;
2806out_resource:
2807 return nfserr_resource;
2808}
2809
1da177e4
LT		 2810/*
2811 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2812 * ourselves.
1da177e4 2813 */
da2ebce6 2814static __be32
d5184658
BF		 2815nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2816 struct svc_export *exp,
2817 struct dentry *dentry, u32 *bmval,
406a7ea9 2818 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2819{
2820 u32 bmval0 = bmval[0];
2821 u32 bmval1 = bmval[1];
7e705706 2822 u32 bmval2 = bmval[2];
1da177e4 2823 struct kstat stat;
d50e6136 2824 struct svc_fh *tempfh = NULL;
1da177e4 2825 struct kstatfs statfs;
ddd1ea56 2826 __be32 *p;
1fcea5b2 2827 int starting_len = xdr->buf->len;
082d4bd7
BF		 2828 int attrlen_offset;
2829 __be32 attrlen;
1da177e4
LT		 2830 u32 dummy;
2831 u64 dummy64;
42ca0993 2832 u32 rdattr_err = 0;
b37ad28b 2833 __be32 status;
b8dd7b9a 2834 int err;
1da177e4 2835 struct nfs4_acl *acl = NULL;
0ab88ca4 2836#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2837 void *context = NULL;
2838 int contextlen;
0ab88ca4 2839#endif
18032ca0 2840 bool contextsupport = false;
7e705706
AA		 2841 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2842 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2843 struct path path = {
2844 .mnt = exp->ex_path.mnt,
2845 .dentry = dentry,
2846 };
3d733711 2847 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2848
2849 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
916d2d84 2850 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
1da177e4 2851
42ca0993 2852 if (exp->ex_fslocs.migrated) {
c2227a39 2853 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
42ca0993
BF		 2854 if (status)
2855 goto out;
2856 }
2857
a528d35e 2858 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
b8dd7b9a 2859 if (err)
1da177e4 2860 goto out_nfserr;
12337901
CH		 2861 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2862 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2863 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2864 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2865 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2866 if (err)
1da177e4
LT		 2867 goto out_nfserr;
2868 }
2869 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2870 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2871 status = nfserr_jukebox;
2872 if (!tempfh)
2873 goto out;
2874 fh_init(tempfh, NFS4_FHSIZE);
2875 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2876 if (status)
2877 goto out;
d50e6136 2878 fhp = tempfh;
1da177e4 2879 }
0c9d65e7 2880 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2881 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
0c9d65e7
AG		 2882 if (err == -EOPNOTSUPP)
2883 bmval0 &= ~FATTR4_WORD0_ACL;
2884 else if (err == -EINVAL) {
2885 status = nfserr_attrnotsupp;
2886 goto out;
2887 } else if (err != 0)
2888 goto out_nfserr;
1da177e4 2889 }
1da177e4 2890
18032ca0 2891#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
c2227a39
KM		 2892 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2893 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
32ddd944
BF		 2894 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2895 err = security_inode_getsecctx(d_inode(dentry),
18032ca0 2896 &context, &contextlen);
32ddd944
BF		 2897 else
2898 err = -EOPNOTSUPP;
18032ca0
DQ		 2899 contextsupport = (err == 0);
2900 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2901 if (err == -EOPNOTSUPP)
2902 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2903 else if (err)
2904 goto out_nfserr;
2905 }
2906 }
2907#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2908
75976de6
KM		 2909 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2910 if (status)
2911 goto out;
082d4bd7
BF		 2912
2913 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2914 p = xdr_reserve_space(xdr, 4);
2915 if (!p)
2916 goto out_resource;
082d4bd7 2917 p++; /* to be backfilled later */
1da177e4
LT		 2918
2919 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
dcd20869
BF		 2920 u32 supp[3];
2921
2922 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
7e705706 2923
0c9d65e7 2924 if (!IS_POSIXACL(dentry->d_inode))
916d2d84 2925 supp[0] &= ~FATTR4_WORD0_ACL;
18032ca0 2926 if (!contextsupport)
916d2d84
BF		 2927 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2928 if (!supp[2]) {
ddd1ea56
BF		 2929 p = xdr_reserve_space(xdr, 12);
2930 if (!p)
2b44f1ba 2931 goto out_resource;
c373b0a4 2932 *p++ = cpu_to_be32(2);
916d2d84
BF		 2933 *p++ = cpu_to_be32(supp[0]);
2934 *p++ = cpu_to_be32(supp[1]);
7e705706 2935 } else {
ddd1ea56
BF		 2936 p = xdr_reserve_space(xdr, 16);
2937 if (!p)
2b44f1ba 2938 goto out_resource;
c373b0a4 2939 *p++ = cpu_to_be32(3);
916d2d84
BF		 2940 *p++ = cpu_to_be32(supp[0]);
2941 *p++ = cpu_to_be32(supp[1]);
2942 *p++ = cpu_to_be32(supp[2]);
7e705706 2943 }
1da177e4
LT		 2944 }
2945 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2946 p = xdr_reserve_space(xdr, 4);
2947 if (!p)
1da177e4 2948 goto out_resource;
3d2544b1 2949 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2950 if (dummy == NF4BAD) {
2951 status = nfserr_serverfault;
2952 goto out;
2953 }
c373b0a4 2954 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2955 }
2956 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2957 p = xdr_reserve_space(xdr, 4);
2958 if (!p)
1da177e4 2959 goto out_resource;
49640001 2960 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2961 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2962 else
c373b0a4
BF		 2963 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2964 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2965 }
2966 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2967 p = xdr_reserve_space(xdr, 8);
2968 if (!p)
1da177e4 2969 goto out_resource;
b8800921 2970 p = encode_change(p, &stat, d_inode(dentry), exp);
1da177e4
LT		 2971 }
2972 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2973 p = xdr_reserve_space(xdr, 8);
2974 if (!p)
1da177e4 2975 goto out_resource;
b64c7f3b 2976 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2977 }
2978 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2979 p = xdr_reserve_space(xdr, 4);
2980 if (!p)
1da177e4 2981 goto out_resource;
c373b0a4 2982 *p++ = cpu_to_be32(1);
1da177e4
LT		 2983 }
2984 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2985 p = xdr_reserve_space(xdr, 4);
2986 if (!p)
1da177e4 2987 goto out_resource;
c373b0a4 2988 *p++ = cpu_to_be32(1);
1da177e4
LT		 2989 }
2990 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2991 p = xdr_reserve_space(xdr, 4);
2992 if (!p)
1da177e4 2993 goto out_resource;
c373b0a4 2994 *p++ = cpu_to_be32(0);
1da177e4
LT		 2995 }
2996 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2997 p = xdr_reserve_space(xdr, 16);
2998 if (!p)
1da177e4 2999 goto out_resource;
42ca0993 3000 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 3001 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
3002 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 3003 } else switch(fsid_source(fhp)) {
3004 case FSIDSOURCE_FSID:
b64c7f3b
BF		 3005 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
3006 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 3007 break;
3008 case FSIDSOURCE_DEV:
c373b0a4
BF		 3009 *p++ = cpu_to_be32(0);
3010 *p++ = cpu_to_be32(MAJOR(stat.dev));
3011 *p++ = cpu_to_be32(0);
3012 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 3013 break;
3014 case FSIDSOURCE_UUID:
94eb3689
KM		 3015 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
3016 EX_UUID_LEN);
af6a4e28 3017 break;
1da177e4
LT		 3018 }
3019 }
3020 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 3021 p = xdr_reserve_space(xdr, 4);
3022 if (!p)
1da177e4 3023 goto out_resource;
c373b0a4 3024 *p++ = cpu_to_be32(0);
1da177e4
LT		 3025 }
3026 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 3027 p = xdr_reserve_space(xdr, 4);
3028 if (!p)
1da177e4 3029 goto out_resource;
c373b0a4 3030 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 3031 }
3032 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 3033 p = xdr_reserve_space(xdr, 4);
3034 if (!p)
1da177e4 3035 goto out_resource;
c373b0a4 3036 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 3037 }
3038 if (bmval0 & FATTR4_WORD0_ACL) {
3039 struct nfs4_ace *ace;
1da177e4
LT		 3040
3041 if (acl == NULL) {
ddd1ea56
BF		 3042 p = xdr_reserve_space(xdr, 4);
3043 if (!p)
1da177e4
LT		 3044 goto out_resource;
3045
c373b0a4 3046 *p++ = cpu_to_be32(0);
1da177e4
LT		 3047 goto out_acl;
3048 }
ddd1ea56
BF		 3049 p = xdr_reserve_space(xdr, 4);
3050 if (!p)
1da177e4 3051 goto out_resource;
c373b0a4 3052 *p++ = cpu_to_be32(acl->naces);
1da177e4 3053
28e05dd8 3054 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 3055 p = xdr_reserve_space(xdr, 4*3);
3056 if (!p)
1da177e4 3057 goto out_resource;
c373b0a4
BF		 3058 *p++ = cpu_to_be32(ace->type);
3059 *p++ = cpu_to_be32(ace->flag);
3060 *p++ = cpu_to_be32(ace->access_mask &
3061 NFS4_ACE_MASK_ALL);
ddd1ea56 3062 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 3063 if (status)
3064 goto out;
3065 }
3066 }
3067out_acl:
3068 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 3069 p = xdr_reserve_space(xdr, 4);
3070 if (!p)
1da177e4 3071 goto out_resource;
0c9d65e7 3072 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
1da177e4
LT		 3073 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
3074 }
3075 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 3076 p = xdr_reserve_space(xdr, 4);
3077 if (!p)
1da177e4 3078 goto out_resource;
c373b0a4 3079 *p++ = cpu_to_be32(1);
1da177e4
LT		 3080 }
3081 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 3082 p = xdr_reserve_space(xdr, 4);
3083 if (!p)
1da177e4 3084 goto out_resource;
c373b0a4 3085 *p++ = cpu_to_be32(0);
1da177e4
LT		 3086 }
3087 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 3088 p = xdr_reserve_space(xdr, 4);
3089 if (!p)
1da177e4 3090 goto out_resource;
c373b0a4 3091 *p++ = cpu_to_be32(1);
1da177e4
LT		 3092 }
3093 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 3094 p = xdr_reserve_space(xdr, 4);
3095 if (!p)
1da177e4 3096 goto out_resource;
c373b0a4 3097 *p++ = cpu_to_be32(1);
1da177e4
LT		 3098 }
3099 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 3100 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
3101 if (!p)
1da177e4 3102 goto out_resource;
0c0c267b
BF		 3103 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
3104 fhp->fh_handle.fh_size);
1da177e4
LT		 3105 }
3106 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 3107 p = xdr_reserve_space(xdr, 8);
3108 if (!p)
1da177e4 3109 goto out_resource;
b64c7f3b 3110 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 3111 }
3112 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 3113 p = xdr_reserve_space(xdr, 8);
3114 if (!p)
1da177e4 3115 goto out_resource;
b64c7f3b 3116 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 3117 }
3118 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 3119 p = xdr_reserve_space(xdr, 8);
3120 if (!p)
1da177e4 3121 goto out_resource;
b64c7f3b 3122 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 3123 }
3124 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 3125 p = xdr_reserve_space(xdr, 8);
3126 if (!p)
1da177e4 3127 goto out_resource;
b64c7f3b 3128 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 3129 }
81c3f413 3130 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 3131 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 3132 if (status)
3133 goto out;
3134 }
1da177e4 3135 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 3136 p = xdr_reserve_space(xdr, 4);
3137 if (!p)
1da177e4 3138 goto out_resource;
c373b0a4 3139 *p++ = cpu_to_be32(1);
1da177e4
LT		 3140 }
3141 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 3142 p = xdr_reserve_space(xdr, 8);
3143 if (!p)
1da177e4 3144 goto out_resource;
b64c7f3b 3145 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 3146 }
3147 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 3148 p = xdr_reserve_space(xdr, 4);
3149 if (!p)
1da177e4 3150 goto out_resource;
c373b0a4 3151 *p++ = cpu_to_be32(255);
1da177e4
LT		 3152 }
3153 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 3154 p = xdr_reserve_space(xdr, 4);
3155 if (!p)
1da177e4 3156 goto out_resource;
c373b0a4 3157 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 3158 }
3159 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 3160 p = xdr_reserve_space(xdr, 8);
3161 if (!p)
1da177e4 3162 goto out_resource;
b64c7f3b 3163 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 3164 }
3165 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 3166 p = xdr_reserve_space(xdr, 8);
3167 if (!p)
1da177e4 3168 goto out_resource;
b64c7f3b 3169 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 3170 }
3171 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 3172 p = xdr_reserve_space(xdr, 4);
3173 if (!p)
1da177e4 3174 goto out_resource;
c373b0a4 3175 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 3176 }
3177 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 3178 p = xdr_reserve_space(xdr, 4);
3179 if (!p)
1da177e4 3180 goto out_resource;
c373b0a4 3181 *p++ = cpu_to_be32(1);
1da177e4
LT		 3182 }
3183 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 3184 p = xdr_reserve_space(xdr, 4);
3185 if (!p)
1da177e4 3186 goto out_resource;
c373b0a4 3187 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 3188 }
3189 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 3190 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 3191 if (status)
3192 goto out;
3193 }
3194 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 3195 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 3196 if (status)
3197 goto out;
3198 }
3199 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 3200 p = xdr_reserve_space(xdr, 8);
3201 if (!p)
1da177e4 3202 goto out_resource;
c373b0a4
BF		 3203 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
3204 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 3205 }
3206 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 3207 p = xdr_reserve_space(xdr, 8);
3208 if (!p)
1da177e4
LT		 3209 goto out_resource;
3210 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 3211 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3212 }
3213 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 3214 p = xdr_reserve_space(xdr, 8);
3215 if (!p)
1da177e4
LT		 3216 goto out_resource;
3217 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 3218 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3219 }
3220 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 3221 p = xdr_reserve_space(xdr, 8);
3222 if (!p)
1da177e4
LT		 3223 goto out_resource;
3224 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 3225 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3226 }
3227 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 3228 p = xdr_reserve_space(xdr, 8);
3229 if (!p)
1da177e4
LT		 3230 goto out_resource;
3231 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 3232 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 3233 }
3234 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 3235 p = xdr_reserve_space(xdr, 12);
3236 if (!p)
1da177e4 3237 goto out_resource;
b64c7f3b 3238 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 3239 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 3240 }
3241 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 3242 p = xdr_reserve_space(xdr, 12);
3243 if (!p)
1da177e4 3244 goto out_resource;
16945141 3245 p = encode_time_delta(p, d_inode(dentry));
1da177e4
LT		 3246 }
3247 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 3248 p = xdr_reserve_space(xdr, 12);
3249 if (!p)
1da177e4 3250 goto out_resource;
b64c7f3b 3251 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 3252 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 3253 }
3254 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 3255 p = xdr_reserve_space(xdr, 12);
3256 if (!p)
1da177e4 3257 goto out_resource;
b64c7f3b 3258 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 3259 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 3260 }
3261 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
0a2050d7
KM		 3262 struct kstat parent_stat;
3263 u64 ino = stat.ino;
3264
ddd1ea56
BF		 3265 p = xdr_reserve_space(xdr, 8);
3266 if (!p)
1da177e4 3267 goto out_resource;
406a7ea9
FF		 3268 /*
3269 * Get parent's attributes if not ignoring crossmount
3270 * and this is the root of a cross-mounted filesystem.
3271 */
3272 if (ignore_crossmnt == 0 &&
0a2050d7
KM		 3273 dentry == exp->ex_path.mnt->mnt_root) {
3274 err = get_parent_attributes(exp, &parent_stat);
3275 if (err)
3276 goto out_nfserr;
3277 ino = parent_stat.ino;
3278 }
3279 p = xdr_encode_hyper(p, ino);
1da177e4 3280 }
9cf514cc 3281#ifdef CONFIG_NFSD_PNFS
6896f15a 3282 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
8a4c3926 3283 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 3284 if (status)
3285 goto out;
3286 }
3287
3288 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
8a4c3926 3289 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 3290 if (status)
3291 goto out;
9cf514cc
CH		 3292 }
3293
3294 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
3295 p = xdr_reserve_space(xdr, 4);
3296 if (!p)
3297 goto out_resource;
3298 *p++ = cpu_to_be32(stat.blksize);
3299 }
3300#endif /* CONFIG_NFSD_PNFS */
8c18f205 3301 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
b26b78cb
TM		 3302 u32 supp[3];
3303
3304 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
3305 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
3306 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
3307 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
3308
3309 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
75976de6
KM		 3310 if (status)
3311 goto out;
8c18f205 3312 }
7e705706 3313
0ab88ca4 3314#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
7d580722
KM		 3315 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
3316 status = nfsd4_encode_security_label(xdr, rqstp, context,
3317 contextlen);
3318 if (status)
3319 goto out;
3320 }
0ab88ca4 3321#endif
7d580722 3322
0e885e84
FL		 3323 if (bmval2 & FATTR4_WORD2_XATTR_SUPPORT) {
3324 p = xdr_reserve_space(xdr, 4);
3325 if (!p)
3326 goto out_resource;
3327 err = xattr_supported_namespace(d_inode(dentry),
3328 XATTR_USER_PREFIX);
3329 *p++ = cpu_to_be32(err == 0);
3330 }
3331
082d4bd7
BF		 3332 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
3333 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 3334 status = nfs_ok;
3335
3336out:
ba4e55bb 3337#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 3338 if (context)
3339 security_release_secctx(context, contextlen);
ba4e55bb 3340#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 3341 kfree(acl);
18df11d0 3342 if (tempfh) {
d50e6136 3343 fh_put(tempfh);
18df11d0
YZ		 3344 kfree(tempfh);
3345 }
1fcea5b2
BF		 3346 if (status)
3347 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3348 return status;
3349out_nfserr:
b8dd7b9a 3350 status = nfserrno(err);
1da177e4
LT		 3351 goto out;
3352out_resource:
1da177e4
LT		 3353 status = nfserr_resource;
3354 goto out;
1da177e4
LT		 3355}
3356
2825a7f9
BF		 3357static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
3358 struct xdr_buf *buf, __be32 *p, int bytes)
3359{
3360 xdr->scratch.iov_len = 0;
3361 memset(buf, 0, sizeof(struct xdr_buf));
3362 buf->head[0].iov_base = p;
3363 buf->head[0].iov_len = 0;
3364 buf->len = 0;
3365 xdr->buf = buf;
3366 xdr->iov = buf->head;
3367 xdr->p = p;
3368 xdr->end = (void *)p + bytes;
3369 buf->buflen = bytes;
3370}
3371
d5184658
BF		 3372__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
3373 struct svc_fh *fhp, struct svc_export *exp,
3374 struct dentry *dentry, u32 *bmval,
3375 struct svc_rqst *rqstp, int ignore_crossmnt)
3376{
2825a7f9 3377 struct xdr_buf dummy;
d5184658
BF		 3378 struct xdr_stream xdr;
3379 __be32 ret;
3380
2825a7f9 3381 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 3382 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
3383 ignore_crossmnt);
3384 *p = xdr.p;
3385 return ret;
3386}
3387
c0ce6ec8
BF		 3388static inline int attributes_need_mount(u32 *bmval)
3389{
3390 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
3391 return 1;
3392 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
3393 return 1;
3394 return 0;
3395}
3396
b37ad28b 3397static __be32
561f0ed4
BF		 3398nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
3399 const char *name, int namlen)
1da177e4
LT		 3400{
3401 struct svc_export *exp = cd->rd_fhp->fh_export;
3402 struct dentry *dentry;
b37ad28b 3403 __be32 nfserr;
406a7ea9 3404 int ignore_crossmnt = 0;
1da177e4 3405
6c2d4798 3406 dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
1da177e4
LT		 3407 if (IS_ERR(dentry))
3408 return nfserrno(PTR_ERR(dentry));
3409
3410 exp_get(exp);
406a7ea9
FF		 3411 /*
3412 * In the case of a mountpoint, the client may be asking for
3413 * attributes that are only properties of the underlying filesystem
3414 * as opposed to the cross-mounted file system. In such a case,
3415 * we will not follow the cross mount and will fill the attribtutes
3416 * directly from the mountpoint dentry.
3417 */
3227fa41 3418 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 3419 int err;
3420
3227fa41
BF		 3421 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3422 && !attributes_need_mount(cd->rd_bmval)) {
3423 ignore_crossmnt = 1;
3424 goto out_encode;
3425 }
dcb488a3
AA		 3426 /*
3427 * Why the heck aren't we just using nfsd_lookup??
3428 * Different "."/".." handling? Something else?
3429 * At least, add a comment here to explain....
3430 */
021d3a72
BF		 3431 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3432 if (err) {
3433 nfserr = nfserrno(err);
1da177e4
LT		 3434 goto out_put;
3435 }
dcb488a3
AA		 3436 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3437 if (nfserr)
3438 goto out_put;
1da177e4
LT		 3439
3440 }
3227fa41 3441out_encode:
561f0ed4 3442 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 3443 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 3444out_put:
3445 dput(dentry);
3446 exp_put(exp);
3447 return nfserr;
3448}
3449
2ebbc012 3450static __be32 *
561f0ed4 3451nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 3452{
561f0ed4
BF		 3453 __be32 *p;
3454
c3a45617 3455 p = xdr_reserve_space(xdr, 20);
561f0ed4 3456 if (!p)
1da177e4
LT		 3457 return NULL;
3458 *p++ = htonl(2);
3459 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
3460 *p++ = htonl(0); /* bmval1 */
3461
87915c64 3462 *p++ = htonl(4); /* attribute length */
1da177e4 3463 *p++ = nfserr; /* no htonl */
1da177e4
LT		 3464 return p;
3465}
3466
3467static int
a0ad13ef
N		 3468nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3469 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 3470{
a0ad13ef 3471 struct readdir_cd *ccd = ccdv;
1da177e4 3472 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 3473 struct xdr_stream *xdr = cd->xdr;
3474 int start_offset = xdr->buf->len;
3475 int cookie_offset;
aee37764 3476 u32 name_and_cookie;
561f0ed4 3477 int entry_bytes;
b37ad28b 3478 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 3479 __be64 wire_offset;
3480 __be32 *p;
1da177e4
LT		 3481
3482 /* In nfsv4, "." and ".." never make it onto the wire.. */
3483 if (name && isdotent(name, namlen)) {
3484 cd->common.err = nfs_ok;
3485 return 0;
3486 }
3487
561f0ed4
BF		 3488 if (cd->cookie_offset) {
3489 wire_offset = cpu_to_be64(offset);
3490 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3491 &wire_offset, 8);
3492 }
1da177e4 3493
561f0ed4
BF		 3494 p = xdr_reserve_space(xdr, 4);
3495 if (!p)
1da177e4 3496 goto fail;
1da177e4 3497 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 3498 cookie_offset = xdr->buf->len;
3499 p = xdr_reserve_space(xdr, 3*4 + namlen);
3500 if (!p)
3501 goto fail;
1da177e4
LT		 3502 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
3503 p = xdr_encode_array(p, name, namlen); /* name length & name */
3504
561f0ed4 3505 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 3506 switch (nfserr) {
3507 case nfs_ok:
1da177e4
LT		 3508 break;
3509 case nfserr_resource:
3510 nfserr = nfserr_toosmall;
3511 goto fail;
b2c0cea6 3512 case nfserr_noent:
f41c5ad2 3513 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 3514 goto skip_entry;
1da177e4
LT		 3515 default:
3516 /*
3517 * If the client requested the RDATTR_ERROR attribute,
3518 * we stuff the error code into this attribute
3519 * and continue. If this attribute was not requested,
3520 * then in accordance with the spec, we fail the
3521 * entire READDIR operation(!)
3522 */
3523 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3524 goto fail;
561f0ed4 3525 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 3526 if (p == NULL) {
3527 nfserr = nfserr_toosmall;
1da177e4 3528 goto fail;
34081efc 3529 }
1da177e4 3530 }
561f0ed4
BF		 3531 nfserr = nfserr_toosmall;
3532 entry_bytes = xdr->buf->len - start_offset;
3533 if (entry_bytes > cd->rd_maxcount)
3534 goto fail;
3535 cd->rd_maxcount -= entry_bytes;
aee37764
BF		 3536 /*
3537 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3538 * let's always let through the first entry, at least:
3539 */
0ec016e3
BF		 3540 if (!cd->rd_dircount)
3541 goto fail;
3542 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
aee37764
BF		 3543 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3544 goto fail;
3545 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
0ec016e3 3546
561f0ed4 3547 cd->cookie_offset = cookie_offset;
b2c0cea6 3548skip_entry:
1da177e4
LT		 3549 cd->common.err = nfs_ok;
3550 return 0;
3551fail:
561f0ed4 3552 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 3553 cd->common.err = nfserr;
3554 return -EINVAL;
3555}
3556
d0a381dd
BF		 3557static __be32
3558nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 3559{
bc749ca4 3560 __be32 *p;
e2f282b9 3561
d0a381dd
BF		 3562 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3563 if (!p)
3564 return nfserr_resource;
c373b0a4 3565 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 3566 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3567 sizeof(stateid_opaque_t));
d0a381dd 3568 return 0;
e2f282b9
BH		 3569}
3570
695e12f8 3571static __be32
b37ad28b 3572nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 3573{
d0a381dd 3574 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3575 __be32 *p;
1da177e4 3576
bac966d6
BF		 3577 p = xdr_reserve_space(xdr, 8);
3578 if (!p)
3579 return nfserr_resource;
3580 *p++ = cpu_to_be32(access->ac_supported);
3581 *p++ = cpu_to_be32(access->ac_resp_access);
3582 return 0;
1da177e4
LT		 3583}
3584
1d1bc8f2
BF		 3585static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3586{
d0a381dd 3587 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 3588 __be32 *p;
3589
bac966d6
BF		 3590 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3591 if (!p)
3592 return nfserr_resource;
3593 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3594 NFS4_MAX_SESSIONID_LEN);
3595 *p++ = cpu_to_be32(bcts->dir);
3596 /* Upshifting from TCP to RDMA is not supported */
3597 *p++ = cpu_to_be32(0);
3598 return 0;
1d1bc8f2
BF		 3599}
3600
695e12f8 3601static __be32
b37ad28b 3602nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 3603{
d0a381dd
BF		 3604 struct xdr_stream *xdr = &resp->xdr;
3605
bac966d6 3606 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
1da177e4
LT		 3607}
3608
3609
695e12f8 3610static __be32
b37ad28b 3611nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 3612{
d0a381dd 3613 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3614 __be32 *p;
1da177e4 3615
bac966d6
BF		 3616 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3617 if (!p)
3618 return nfserr_resource;
3619 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
0c0c267b 3620 NFS4_VERIFIER_SIZE);
bac966d6 3621 return 0;
1da177e4
LT		 3622}
3623
695e12f8 3624static __be32
b37ad28b 3625nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 3626{
d0a381dd 3627 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3628 __be32 *p;
1da177e4 3629
bac966d6
BF		 3630 p = xdr_reserve_space(xdr, 20);
3631 if (!p)
3632 return nfserr_resource;
3633 encode_cinfo(p, &create->cr_cinfo);
b96811cd 3634 return nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
bac966d6 3635 create->cr_bmval[1], create->cr_bmval[2]);
1da177e4
LT		 3636}
3637
b37ad28b
AV		 3638static __be32
3639nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 3640{
3641 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 3642 struct xdr_stream *xdr = &resp->xdr;
1da177e4 3643
bac966d6
BF		 3644 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3645 getattr->ga_bmval, resp->rqstp, 0);
1da177e4
LT		 3646}
3647
695e12f8
BH		 3648static __be32
3649nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 3650{
d0a381dd 3651 struct xdr_stream *xdr = &resp->xdr;
695e12f8 3652 struct svc_fh *fhp = *fhpp;
1da177e4 3653 unsigned int len;
bc749ca4 3654 __be32 *p;
1da177e4 3655
bac966d6
BF		 3656 len = fhp->fh_handle.fh_size;
3657 p = xdr_reserve_space(xdr, len + 4);
3658 if (!p)
3659 return nfserr_resource;
3660 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3661 return 0;
1da177e4
LT		 3662}
3663
3664/*
3665* Including all fields other than the name, a LOCK4denied structure requires
3666* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3667*/
d0a381dd
BF		 3668static __be32
3669nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 3670{
7c13f344 3671 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 3672 __be32 *p;
1da177e4 3673
8c7424cf 3674again:
d0a381dd 3675 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 3676 if (!p) {
3677 /*
3678 * Don't fail to return the result just because we can't
3679 * return the conflicting open:
3680 */
3681 if (conf->len) {
f98bac5a 3682 kfree(conf->data);
8c7424cf
BF		 3683 conf->len = 0;
3684 conf->data = NULL;
3685 goto again;
3686 }
d0a381dd 3687 return nfserr_resource;
8c7424cf 3688 }
b64c7f3b
BF		 3689 p = xdr_encode_hyper(p, ld->ld_start);
3690 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 3691 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 3692 if (conf->len) {
0c0c267b
BF		 3693 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3694 p = xdr_encode_opaque(p, conf->data, conf->len);
f98bac5a 3695 kfree(conf->data);
1da177e4 3696 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 3697 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 3698 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 3699 }
d0a381dd 3700 return nfserr_denied;
1da177e4
LT		 3701}
3702
695e12f8 3703static __be32
b37ad28b 3704nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 3705{
d0a381dd
BF		 3706 struct xdr_stream *xdr = &resp->xdr;
3707
e2f282b9 3708 if (!nfserr)
d0a381dd 3709 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 3710 else if (nfserr == nfserr_denied)
d0a381dd 3711 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
f98bac5a 3712
695e12f8 3713 return nfserr;
1da177e4
LT		 3714}
3715
695e12f8 3716static __be32
b37ad28b 3717nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 3718{
d0a381dd
BF		 3719 struct xdr_stream *xdr = &resp->xdr;
3720
1da177e4 3721 if (nfserr == nfserr_denied)
d0a381dd 3722 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 3723 return nfserr;
1da177e4
LT		 3724}
3725
695e12f8 3726static __be32
b37ad28b 3727nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 3728{
d0a381dd
BF		 3729 struct xdr_stream *xdr = &resp->xdr;
3730
bac966d6 3731 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
1da177e4
LT		 3732}
3733
3734
695e12f8 3735static __be32
b37ad28b 3736nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 3737{
d0a381dd 3738 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3739 __be32 *p;
1da177e4 3740
bac966d6
BF		 3741 p = xdr_reserve_space(xdr, 20);
3742 if (!p)
3743 return nfserr_resource;
3744 p = encode_cinfo(p, &link->li_cinfo);
3745 return 0;
1da177e4
LT		 3746}
3747
3748
695e12f8 3749static __be32
b37ad28b 3750nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 3751{
d0a381dd 3752 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3753 __be32 *p;
1da177e4 3754
d0a381dd
BF		 3755 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3756 if (nfserr)
bac966d6 3757 return nfserr;
75976de6 3758 p = xdr_reserve_space(xdr, 24);
d0a381dd
BF		 3759 if (!p)
3760 return nfserr_resource;
d05d5744 3761 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4 3762 *p++ = cpu_to_be32(open->op_rflags);
1da177e4 3763
75976de6
KM		 3764 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3765 open->op_bmval[2]);
3766 if (nfserr)
bac966d6 3767 return nfserr;
75976de6
KM		 3768
3769 p = xdr_reserve_space(xdr, 4);
3770 if (!p)
3771 return nfserr_resource;
3772
3773 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 3774 switch (open->op_delegate_type) {
3775 case NFS4_OPEN_DELEGATE_NONE:
3776 break;
3777 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 3778 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3779 if (nfserr)
3780 return nfserr;
3781 p = xdr_reserve_space(xdr, 20);
3782 if (!p)
3783 return nfserr_resource;
c373b0a4 3784 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 3785
3786 /*
3787 * TODO: ACE's in delegations
3788 */
c373b0a4
BF		 3789 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3790 *p++ = cpu_to_be32(0);
3791 *p++ = cpu_to_be32(0);
3792 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 3793 break;
3794 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 3795 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3796 if (nfserr)
3797 return nfserr;
3798 p = xdr_reserve_space(xdr, 32);
3799 if (!p)
3800 return nfserr_resource;
c373b0a4 3801 *p++ = cpu_to_be32(0);
1da177e4
LT		 3802
3803 /*
3804 * TODO: space_limit's in delegations
3805 */
c373b0a4
BF		 3806 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3807 *p++ = cpu_to_be32(~(u32)0);
3808 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3809
3810 /*
3811 * TODO: ACE's in delegations
3812 */
c373b0a4
BF		 3813 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3814 *p++ = cpu_to_be32(0);
3815 *p++ = cpu_to_be32(0);
3816 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3817 break;
d24433cd
BH		 3818 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3819 switch (open->op_why_no_deleg) {
3820 case WND4_CONTENTION:
3821 case WND4_RESOURCE:
d0a381dd
BF		 3822 p = xdr_reserve_space(xdr, 8);
3823 if (!p)
3824 return nfserr_resource;
c373b0a4
BF		 3825 *p++ = cpu_to_be32(open->op_why_no_deleg);
3826 /* deleg signaling not supported yet: */
3827 *p++ = cpu_to_be32(0);
d24433cd
BH		 3828 break;
3829 default:
d0a381dd
BF		 3830 p = xdr_reserve_space(xdr, 4);
3831 if (!p)
3832 return nfserr_resource;
c373b0a4 3833 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3834 }
d24433cd 3835 break;
1da177e4
LT		 3836 default:
3837 BUG();
3838 }
3839 /* XXX save filehandle here */
bac966d6 3840 return 0;
1da177e4
LT		 3841}
3842
695e12f8 3843static __be32
b37ad28b 3844nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3845{
d0a381dd
BF		 3846 struct xdr_stream *xdr = &resp->xdr;
3847
bac966d6 3848 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4
LT		 3849}
3850
695e12f8 3851static __be32
b37ad28b 3852nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3853{
d0a381dd
BF		 3854 struct xdr_stream *xdr = &resp->xdr;
3855
bac966d6 3856 return nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4
LT		 3857}
3858
dc97618d
BF		 3859static __be32 nfsd4_encode_splice_read(
3860 struct nfsd4_compoundres *resp,
3861 struct nfsd4_read *read,
3862 struct file *file, unsigned long maxcount)
1da177e4 3863{
ddd1ea56 3864 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3865 struct xdr_buf *buf = xdr->buf;
76e5492b 3866 int status, space_left;
dc97618d 3867 u32 eof;
dc97618d 3868 __be32 nfserr;
fec25fa4 3869 __be32 *p = xdr->p - 2;
1da177e4 3870
d5d5c304
KM		 3871 /* Make sure there will be room for padding if needed */
3872 if (xdr->end - xdr->p < 1)
d0a381dd 3873 return nfserr_resource;
dc97618d 3874
87c5942e 3875 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
83a63072 3876 file, read->rd_offset, &maxcount, &eof);
87c5942e 3877 read->rd_length = maxcount;
76e5492b
CL		 3878 if (nfserr)
3879 goto out_err;
3880 status = svc_encode_result_payload(read->rd_rqstp,
3881 buf->head[0].iov_len, maxcount);
3882 if (status) {
3883 nfserr = nfserrno(status);
3884 goto out_err;
b0e35fda 3885 }
1da177e4 3886
fec25fa4
BF		 3887 *(p++) = htonl(eof);
3888 *(p++) = htonl(maxcount);
dc97618d 3889
34a78b48
BF		 3890 buf->page_len = maxcount;
3891 buf->len += maxcount;
15b23ef5
BF		 3892 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3893 / PAGE_SIZE;
dc97618d
BF		 3894
3895 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3896 buf->tail[0].iov_base = xdr->p;
3897 buf->tail[0].iov_len = 0;
fec25fa4 3898 xdr->iov = buf->tail;
dc97618d 3899 if (maxcount&3) {
fec25fa4
BF		 3900 int pad = 4 - (maxcount&3);
3901
3902 *(xdr->p++) = 0;
3903
34a78b48 3904 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3905 buf->tail[0].iov_len = pad;
3906 buf->len += pad;
b0e35fda 3907 }
2825a7f9 3908
dc97618d 3909 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3910 buf->buflen - buf->len);
3911 buf->buflen = buf->len + space_left;
dc97618d
BF		 3912 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3913
3914 return 0;
76e5492b
CL		 3915
3916out_err:
3917 /*
3918 * nfsd_splice_actor may have already messed with the
3919 * page length; reset it so as not to confuse
3920 * xdr_truncate_encode in our caller.
3921 */
3922 buf->page_len = 0;
3923 return nfserr;
dc97618d
BF		 3924}
3925
3926static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3927 struct nfsd4_read *read,
3928 struct file *file, unsigned long maxcount)
3929{
3930 struct xdr_stream *xdr = &resp->xdr;
3931 u32 eof;
dc97618d 3932 int starting_len = xdr->buf->len - 8;
dc97618d
BF		 3933 __be32 nfserr;
3934 __be32 tmp;
b0420980 3935 int pad;
1da177e4 3936
403217f3
AS		 3937 read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, maxcount);
3938 if (read->rd_vlen < 0)
3939 return nfserr_resource;
1da177e4 3940
87c5942e 3941 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
83a63072
TM		 3942 resp->rqstp->rq_vec, read->rd_vlen, &maxcount,
3943 &eof);
87c5942e 3944 read->rd_length = maxcount;
dc97618d 3945 if (nfserr)
1da177e4 3946 return nfserr;
03493bca 3947 if (svc_encode_result_payload(resp->rqstp, starting_len + 8, maxcount))
41205539 3948 return nfserr_io;
7dcf4ab9 3949 xdr_truncate_encode(xdr, starting_len + 8 + xdr_align_size(maxcount));
dc97618d 3950
dc97618d
BF		 3951 tmp = htonl(eof);
3952 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3953 tmp = htonl(maxcount);
3954 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3955
7dcf4ab9 3956 tmp = xdr_zero;
b0420980
BF		 3957 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3958 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
7dcf4ab9 3959 &tmp, pad);
1da177e4 3960 return 0;
dc97618d
BF		 3961
3962}
3963
3964static __be32
3965nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3966 struct nfsd4_read *read)
3967{
3968 unsigned long maxcount;
3969 struct xdr_stream *xdr = &resp->xdr;
5c4583b2 3970 struct file *file;
dc97618d 3971 int starting_len = xdr->buf->len;
dc97618d 3972 __be32 *p;
dc97618d 3973
5c4583b2
JL		 3974 if (nfserr)
3975 return nfserr;
3976 file = read->rd_nf->nf_file;
3977
dc97618d
BF		 3978 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3979 if (!p) {
779fb0f3 3980 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
bac966d6 3981 return nfserr_resource;
dc97618d 3982 }
68e8bb03
CH		 3983 if (resp->xdr.buf->page_len &&
3984 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
b0420980 3985 WARN_ON_ONCE(1);
bac966d6 3986 return nfserr_resource;
dc97618d 3987 }
dc97618d
BF		 3988 xdr_commit_encode(xdr);
3989
3990 maxcount = svc_max_payload(resp->rqstp);
68e8bb03
CH		 3991 maxcount = min_t(unsigned long, maxcount,
3992 (xdr->buf->buflen - xdr->buf->len));
3c7aa15d 3993 maxcount = min_t(unsigned long, maxcount, read->rd_length);
dc97618d 3994
68e8bb03
CH		 3995 if (file->f_op->splice_read &&
3996 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
96bcad50 3997 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
dc97618d 3998 else
96bcad50 3999 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
dc97618d 4000
96bcad50 4001 if (nfserr)
dc97618d 4002 xdr_truncate_encode(xdr, starting_len);
96bcad50 4003
96bcad50 4004 return nfserr;
1da177e4
LT		 4005}
4006
b37ad28b
AV		 4007static __be32
4008nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 4009{
4010 int maxcount;
476a7b1f
BF		 4011 __be32 wire_count;
4012 int zero = 0;
ddd1ea56 4013 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 4014 int length_offset = xdr->buf->len;
76e5492b 4015 int status;
bc749ca4 4016 __be32 *p;
1da177e4 4017
2825a7f9
BF		 4018 p = xdr_reserve_space(xdr, 4);
4019 if (!p)
4020 return nfserr_resource;
1da177e4 4021 maxcount = PAGE_SIZE;
d0a381dd 4022
476a7b1f
BF		 4023 p = xdr_reserve_space(xdr, maxcount);
4024 if (!p)
4e21ac4b 4025 return nfserr_resource;
1da177e4 4026 /*
fd4a0edf
MS		 4027 * XXX: By default, vfs_readlink() will truncate symlinks if they
4028 * would overflow the buffer. Is this kosher in NFSv4? If not, one
4029 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
4030 * that truncation occurred, and return NFS4ERR_RESOURCE.
1da177e4 4031 */
476a7b1f
BF		 4032 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
4033 (char *)p, &maxcount);
1da177e4 4034 if (nfserr == nfserr_isdir)
d3f627c8 4035 nfserr = nfserr_inval;
76e5492b
CL		 4036 if (nfserr)
4037 goto out_err;
4038 status = svc_encode_result_payload(readlink->rl_rqstp, length_offset,
4039 maxcount);
4040 if (status) {
4041 nfserr = nfserrno(status);
4042 goto out_err;
d3f627c8 4043 }
1da177e4 4044
476a7b1f
BF		 4045 wire_count = htonl(maxcount);
4046 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
69bbd9c7 4047 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
476a7b1f
BF		 4048 if (maxcount & 3)
4049 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
4050 &zero, 4 - (maxcount&3));
1da177e4 4051 return 0;
76e5492b
CL		 4052
4053out_err:
4054 xdr_truncate_encode(xdr, length_offset);
4055 return nfserr;
1da177e4
LT		 4056}
4057
b37ad28b
AV		 4058static __be32
4059nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 4060{
4061 int maxcount;
561f0ed4 4062 int bytes_left;
1da177e4 4063 loff_t offset;
561f0ed4 4064 __be64 wire_offset;
ddd1ea56 4065 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 4066 int starting_len = xdr->buf->len;
bc749ca4 4067 __be32 *p;
1da177e4 4068
d0a381dd
BF		 4069 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
4070 if (!p)
4071 return nfserr_resource;
1da177e4
LT		 4072
4073 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 4074 *p++ = cpu_to_be32(0);
4075 *p++ = cpu_to_be32(0);
4aea24b2
BF		 4076 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
4077 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 4078
4079 /*
561f0ed4
BF		 4080 * Number of bytes left for directory entries allowing for the
4081 * final 8 bytes of the readdir and a following failed op:
4082 */
4083 bytes_left = xdr->buf->buflen - xdr->buf->len
4084 - COMPOUND_ERR_SLACK_SPACE - 8;
4085 if (bytes_left < 0) {
4086 nfserr = nfserr_resource;
4087 goto err_no_verf;
4088 }
9c2ece6e
SM		 4089 maxcount = svc_max_payload(resp->rqstp);
4090 maxcount = min_t(u32, readdir->rd_maxcount, maxcount);
561f0ed4
BF		 4091 /*
4092 * Note the rfc defines rd_maxcount as the size of the
4093 * READDIR4resok structure, which includes the verifier above
4094 * and the 8 bytes encoded at the end of this function:
1da177e4 4095 */
561f0ed4
BF		 4096 if (maxcount < 16) {
4097 nfserr = nfserr_toosmall;
1da177e4
LT		 4098 goto err_no_verf;
4099 }
561f0ed4 4100 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 4101
aee37764
BF		 4102 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
4103 if (!readdir->rd_dircount)
9c2ece6e 4104 readdir->rd_dircount = svc_max_payload(resp->rqstp);
aee37764 4105
561f0ed4
BF		 4106 readdir->xdr = xdr;
4107 readdir->rd_maxcount = maxcount;
1da177e4 4108 readdir->common.err = 0;
561f0ed4 4109 readdir->cookie_offset = 0;
1da177e4
LT		 4110
4111 offset = readdir->rd_cookie;
4112 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
4113 &offset,
4114 &readdir->common, nfsd4_encode_dirent);
4115 if (nfserr == nfs_ok &&
4116 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 4117 xdr->buf->len == starting_len + 8) {
4118 /* nothing encoded; which limit did we hit?: */
4119 if (maxcount - 16 < bytes_left)
4120 /* It was the fault of rd_maxcount: */
4121 nfserr = nfserr_toosmall;
4122 else
4123 /* We ran out of buffer space: */
4124 nfserr = nfserr_resource;
4125 }
1da177e4
LT		 4126 if (nfserr)
4127 goto err_no_verf;
4128
561f0ed4
BF		 4129 if (readdir->cookie_offset) {
4130 wire_offset = cpu_to_be64(offset);
4131 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
4132 &wire_offset, 8);
4133 }
1da177e4 4134
561f0ed4
BF		 4135 p = xdr_reserve_space(xdr, 8);
4136 if (!p) {
4137 WARN_ON_ONCE(1);
4138 goto err_no_verf;
4139 }
1da177e4
LT		 4140 *p++ = 0; /* no more entries */
4141 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 4142
4143 return 0;
4144err_no_verf:
1fcea5b2 4145 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 4146 return nfserr;
4147}
4148
695e12f8 4149static __be32
b37ad28b 4150nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 4151{
d0a381dd 4152 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4153 __be32 *p;
1da177e4 4154
bac966d6
BF		 4155 p = xdr_reserve_space(xdr, 20);
4156 if (!p)
4157 return nfserr_resource;
4158 p = encode_cinfo(p, &remove->rm_cinfo);
4159 return 0;
1da177e4
LT		 4160}
4161
695e12f8 4162static __be32
b37ad28b 4163nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 4164{
d0a381dd 4165 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4166 __be32 *p;
1da177e4 4167
bac966d6
BF		 4168 p = xdr_reserve_space(xdr, 40);
4169 if (!p)
4170 return nfserr_resource;
4171 p = encode_cinfo(p, &rename->rn_sinfo);
4172 p = encode_cinfo(p, &rename->rn_tinfo);
4173 return 0;
1da177e4
LT		 4174}
4175
695e12f8 4176static __be32
bac966d6 4177nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
dcb488a3 4178{
676e4ebd 4179 u32 i, nflavs, supported;
4796f457
BF		 4180 struct exp_flavor_info *flavs;
4181 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 4182 __be32 *p, *flavorsp;
4183 static bool report = true;
dcb488a3 4184
4796f457
BF		 4185 if (exp->ex_nflavors) {
4186 flavs = exp->ex_flavors;
4187 nflavs = exp->ex_nflavors;
4188 } else { /* Handling of some defaults in absence of real secinfo: */
4189 flavs = def_flavs;
4190 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
4191 nflavs = 2;
4192 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
4193 flavs[1].pseudoflavor = RPC_AUTH_NULL;
4194 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
4195 nflavs = 1;
4196 flavs[0].pseudoflavor
4197 = svcauth_gss_flavor(exp->ex_client);
4198 } else {
4199 nflavs = 1;
4200 flavs[0].pseudoflavor
4201 = exp->ex_client->flavour->flavour;
4202 }
4203 }
4204
676e4ebd 4205 supported = 0;
d0a381dd
BF		 4206 p = xdr_reserve_space(xdr, 4);
4207 if (!p)
bac966d6 4208 return nfserr_resource;
676e4ebd 4209 flavorsp = p++; /* to be backfilled later */
676e4ebd 4210
4796f457 4211 for (i = 0; i < nflavs; i++) {
676e4ebd 4212 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 4213 struct rpcsec_gss_info info;
dcb488a3 4214
676e4ebd
CL		 4215 if (rpcauth_get_gssinfo(pf, &info) == 0) {
4216 supported++;
d0a381dd
BF		 4217 p = xdr_reserve_space(xdr, 4 + 4 +
4218 XDR_LEN(info.oid.len) + 4 + 4);
4219 if (!p)
bac966d6 4220 return nfserr_resource;
c373b0a4 4221 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 4222 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 4223 *p++ = cpu_to_be32(info.qop);
4224 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 4225 } else if (pf < RPC_AUTH_MAXFLAVOR) {
4226 supported++;
d0a381dd
BF		 4227 p = xdr_reserve_space(xdr, 4);
4228 if (!p)
bac966d6 4229 return nfserr_resource;
c373b0a4 4230 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 4231 } else {
4232 if (report)
4233 pr_warn("NFS: SECINFO: security flavor %u "
4234 "is not supported\n", pf);
dcb488a3
AA		 4235 }
4236 }
a77c806f 4237
676e4ebd
CL		 4238 if (nflavs != supported)
4239 report = false;
4240 *flavorsp = htonl(supported);
bac966d6 4241 return 0;
dcb488a3
AA		 4242}
4243
22b6dee8
MJ		 4244static __be32
4245nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4246 struct nfsd4_secinfo *secinfo)
4247{
d0a381dd
BF		 4248 struct xdr_stream *xdr = &resp->xdr;
4249
bac966d6 4250 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
22b6dee8
MJ		 4251}
4252
4253static __be32
4254nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
4255 struct nfsd4_secinfo_no_name *secinfo)
4256{
d0a381dd
BF		 4257 struct xdr_stream *xdr = &resp->xdr;
4258
bac966d6 4259 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
22b6dee8
MJ		 4260}
4261
1da177e4
LT		 4262/*
4263 * The SETATTR encode routine is special -- it always encodes a bitmap,
4264 * regardless of the error status.
4265 */
695e12f8 4266static __be32
b37ad28b 4267nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 4268{
d0a381dd 4269 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4270 __be32 *p;
1da177e4 4271
d0a381dd
BF		 4272 p = xdr_reserve_space(xdr, 16);
4273 if (!p)
4274 return nfserr_resource;
1da177e4 4275 if (nfserr) {
c373b0a4
BF		 4276 *p++ = cpu_to_be32(3);
4277 *p++ = cpu_to_be32(0);
4278 *p++ = cpu_to_be32(0);
4279 *p++ = cpu_to_be32(0);
1da177e4
LT		 4280 }
4281 else {
c373b0a4
BF		 4282 *p++ = cpu_to_be32(3);
4283 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
4284 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
4285 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 4286 }
695e12f8 4287 return nfserr;
1da177e4
LT		 4288}
4289
695e12f8 4290static __be32
b37ad28b 4291nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 4292{
d0a381dd 4293 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4294 __be32 *p;
1da177e4
LT		 4295
4296 if (!nfserr) {
d0a381dd
BF		 4297 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
4298 if (!p)
4299 return nfserr_resource;
0c0c267b
BF		 4300 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
4301 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
4302 NFS4_VERIFIER_SIZE);
1da177e4
LT		 4303 }
4304 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 4305 p = xdr_reserve_space(xdr, 8);
4306 if (!p)
4307 return nfserr_resource;
c373b0a4
BF		 4308 *p++ = cpu_to_be32(0);
4309 *p++ = cpu_to_be32(0);
1da177e4 4310 }
695e12f8 4311 return nfserr;
1da177e4
LT		 4312}
4313
695e12f8 4314static __be32
b37ad28b 4315nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 4316{
d0a381dd 4317 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4318 __be32 *p;
1da177e4 4319
bac966d6
BF		 4320 p = xdr_reserve_space(xdr, 16);
4321 if (!p)
4322 return nfserr_resource;
4323 *p++ = cpu_to_be32(write->wr_bytes_written);
4324 *p++ = cpu_to_be32(write->wr_how_written);
4325 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4326 NFS4_VERIFIER_SIZE);
4327 return 0;
1da177e4
LT		 4328}
4329
2db134eb 4330static __be32
57b7b43b 4331nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4332 struct nfsd4_exchange_id *exid)
4333{
d0a381dd 4334 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4335 __be32 *p;
0733d213
AA		 4336 char *major_id;
4337 char *server_scope;
4338 int major_id_sz;
4339 int server_scope_sz;
4340 uint64_t minor_id = 0;
7627d7dc 4341 struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id);
0733d213 4342
7627d7dc
SM		 4343 major_id = nn->nfsd_name;
4344 major_id_sz = strlen(nn->nfsd_name);
4345 server_scope = nn->nfsd_name;
4346 server_scope_sz = strlen(nn->nfsd_name);
0733d213 4347
d0a381dd 4348 p = xdr_reserve_space(xdr,
0733d213
AA		 4349 8 /* eir_clientid */ +
4350 4 /* eir_sequenceid */ +
4351 4 /* eir_flags */ +
a8bb84bc 4352 4 /* spr_how */);
d0a381dd
BF		 4353 if (!p)
4354 return nfserr_resource;
0733d213 4355
0c0c267b 4356 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 4357 *p++ = cpu_to_be32(exid->seqid);
4358 *p++ = cpu_to_be32(exid->flags);
0733d213 4359
c373b0a4 4360 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 4361
57266a6e
BF		 4362 switch (exid->spa_how) {
4363 case SP4_NONE:
4364 break;
4365 case SP4_MACH_CRED:
4366 /* spo_must_enforce bitmap: */
bac966d6 4367 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 4368 exid->spo_must_enforce[0],
4369 exid->spo_must_enforce[1],
4370 exid->spo_must_enforce[2]);
bac966d6
BF		 4371 if (nfserr)
4372 return nfserr;
ed941643 4373 /* spo_must_allow bitmap: */
bac966d6 4374 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 4375 exid->spo_must_allow[0],
4376 exid->spo_must_allow[1],
4377 exid->spo_must_allow[2]);
bac966d6
BF		 4378 if (nfserr)
4379 return nfserr;
57266a6e
BF		 4380 break;
4381 default:
4382 WARN_ON_ONCE(1);
4383 }
0733d213 4384
d0a381dd 4385 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 4386 8 /* so_minor_id */ +
4387 4 /* so_major_id.len */ +
4388 (XDR_QUADLEN(major_id_sz) * 4) +
4389 4 /* eir_server_scope.len */ +
4390 (XDR_QUADLEN(server_scope_sz) * 4) +
4391 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 4392 if (!p)
4393 return nfserr_resource;
a8bb84bc 4394
0733d213 4395 /* The server_owner struct */
b64c7f3b 4396 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 4397 /* major id */
0c0c267b 4398 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 4399
4400 /* Server scope */
0c0c267b 4401 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 4402
4403 /* Implementation id */
c373b0a4 4404 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 4405 return 0;
2db134eb
AA		 4406}
4407
4408static __be32
57b7b43b 4409nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4410 struct nfsd4_create_session *sess)
4411{
d0a381dd 4412 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4413 __be32 *p;
ec6b5d7b 4414
d0a381dd
BF		 4415 p = xdr_reserve_space(xdr, 24);
4416 if (!p)
4417 return nfserr_resource;
0c0c267b
BF		 4418 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4419 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4420 *p++ = cpu_to_be32(sess->seqid);
4421 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 4422
d0a381dd
BF		 4423 p = xdr_reserve_space(xdr, 28);
4424 if (!p)
4425 return nfserr_resource;
c373b0a4
BF		 4426 *p++ = cpu_to_be32(0); /* headerpadsz */
4427 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4428 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4429 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4430 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4431 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4432 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4433
4434 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 4435 p = xdr_reserve_space(xdr, 4);
4436 if (!p)
4437 return nfserr_resource;
c373b0a4 4438 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 4439 }
4440
d0a381dd
BF		 4441 p = xdr_reserve_space(xdr, 28);
4442 if (!p)
4443 return nfserr_resource;
c373b0a4
BF		 4444 *p++ = cpu_to_be32(0); /* headerpadsz */
4445 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4446 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4447 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4448 *p++ = cpu_to_be32(sess->back_channel.maxops);
4449 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4450 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4451
4452 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 4453 p = xdr_reserve_space(xdr, 4);
4454 if (!p)
4455 return nfserr_resource;
c373b0a4 4456 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 4457 }
4458 return 0;
2db134eb
AA		 4459}
4460
c47d832b 4461static __be32
57b7b43b 4462nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4463 struct nfsd4_sequence *seq)
4464{
d0a381dd 4465 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4466 __be32 *p;
b85d4c01 4467
d0a381dd
BF		 4468 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4469 if (!p)
4470 return nfserr_resource;
0c0c267b
BF		 4471 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4472 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4473 *p++ = cpu_to_be32(seq->seqid);
4474 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 4475 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 4476 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4477 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4478 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 4479
f5236013 4480 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 4481 return 0;
2db134eb
AA		 4482}
4483
2355c596 4484static __be32
57b7b43b 4485nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 4486 struct nfsd4_test_stateid *test_stateid)
4487{
d0a381dd 4488 struct xdr_stream *xdr = &resp->xdr;
03cfb420 4489 struct nfsd4_test_stateid_id *stateid, *next;
17456804 4490 __be32 *p;
17456804 4491
d0a381dd
BF		 4492 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4493 if (!p)
4494 return nfserr_resource;
17456804 4495 *p++ = htonl(test_stateid->ts_num_ids);
17456804 4496
03cfb420 4497 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 4498 *p++ = stateid->ts_id_status;
17456804 4499 }
17456804 4500
bac966d6 4501 return 0;
17456804
BS		 4502}
4503
9cf514cc
CH		 4504#ifdef CONFIG_NFSD_PNFS
4505static __be32
4506nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4507 struct nfsd4_getdeviceinfo *gdev)
4508{
4509 struct xdr_stream *xdr = &resp->xdr;
f961e3f2 4510 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4511 u32 starting_len = xdr->buf->len, needed_len;
4512 __be32 *p;
4513
9cf514cc
CH		 4514 p = xdr_reserve_space(xdr, 4);
4515 if (!p)
bac966d6 4516 return nfserr_resource;
9cf514cc
CH		 4517
4518 *p++ = cpu_to_be32(gdev->gd_layout_type);
4519
4520 /* If maxcount is 0 then just update notifications */
4521 if (gdev->gd_maxcount != 0) {
f961e3f2 4522 ops = nfsd4_layout_ops[gdev->gd_layout_type];
9cf514cc
CH		 4523 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4524 if (nfserr) {
4525 /*
4526 * We don't bother to burden the layout drivers with
4527 * enforcing gd_maxcount, just tell the client to
4528 * come back with a bigger buffer if it's not enough.
4529 */
4530 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4531 goto toosmall;
bac966d6 4532 return nfserr;
9cf514cc
CH		 4533 }
4534 }
4535
9cf514cc
CH		 4536 if (gdev->gd_notify_types) {
4537 p = xdr_reserve_space(xdr, 4 + 4);
4538 if (!p)
bac966d6 4539 return nfserr_resource;
9cf514cc
CH		 4540 *p++ = cpu_to_be32(1); /* bitmap length */
4541 *p++ = cpu_to_be32(gdev->gd_notify_types);
4542 } else {
4543 p = xdr_reserve_space(xdr, 4);
4544 if (!p)
bac966d6 4545 return nfserr_resource;
9cf514cc
CH		 4546 *p++ = 0;
4547 }
4548
bac966d6 4549 return 0;
9cf514cc
CH		 4550toosmall:
4551 dprintk("%s: maxcount too small\n", __func__);
4552 needed_len = xdr->buf->len + 4 /* notifications */;
4553 xdr_truncate_encode(xdr, starting_len);
4554 p = xdr_reserve_space(xdr, 4);
bac966d6
BF		 4555 if (!p)
4556 return nfserr_resource;
4557 *p++ = cpu_to_be32(needed_len);
4558 return nfserr_toosmall;
9cf514cc
CH		 4559}
4560
4561static __be32
4562nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4563 struct nfsd4_layoutget *lgp)
4564{
4565 struct xdr_stream *xdr = &resp->xdr;
f961e3f2 4566 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4567 __be32 *p;
4568
9cf514cc
CH		 4569 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4570 if (!p)
bac966d6 4571 return nfserr_resource;
9cf514cc
CH		 4572
4573 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4574 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4575 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4576 sizeof(stateid_opaque_t));
4577
4578 *p++ = cpu_to_be32(1); /* we always return a single layout */
4579 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4580 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4581 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4582 *p++ = cpu_to_be32(lgp->lg_layout_type);
4583
f961e3f2 4584 ops = nfsd4_layout_ops[lgp->lg_layout_type];
bac966d6 4585 return ops->encode_layoutget(xdr, lgp);
9cf514cc
CH		 4586}
4587
4588static __be32
4589nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4590 struct nfsd4_layoutcommit *lcp)
4591{
4592 struct xdr_stream *xdr = &resp->xdr;
4593 __be32 *p;
4594
9cf514cc
CH		 4595 p = xdr_reserve_space(xdr, 4);
4596 if (!p)
4597 return nfserr_resource;
4598 *p++ = cpu_to_be32(lcp->lc_size_chg);
4599 if (lcp->lc_size_chg) {
4600 p = xdr_reserve_space(xdr, 8);
4601 if (!p)
4602 return nfserr_resource;
4603 p = xdr_encode_hyper(p, lcp->lc_newsize);
4604 }
4605
bac966d6 4606 return 0;
9cf514cc
CH		 4607}
4608
4609static __be32
4610nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4611 struct nfsd4_layoutreturn *lrp)
4612{
4613 struct xdr_stream *xdr = &resp->xdr;
4614 __be32 *p;
4615
9cf514cc
CH		 4616 p = xdr_reserve_space(xdr, 4);
4617 if (!p)
4618 return nfserr_resource;
4619 *p++ = cpu_to_be32(lrp->lrs_present);
4620 if (lrp->lrs_present)
376675da 4621 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
bac966d6 4622 return 0;
9cf514cc
CH		 4623}
4624#endif /* CONFIG_NFSD_PNFS */
4625
29ae7f9d 4626static __be32
e0639dc5
OK		 4627nfsd42_encode_write_res(struct nfsd4_compoundres *resp,
4628 struct nfsd42_write_res *write, bool sync)
29ae7f9d
AS		 4629{
4630 __be32 *p;
e0639dc5
OK		 4631 p = xdr_reserve_space(&resp->xdr, 4);
4632 if (!p)
4633 return nfserr_resource;
29ae7f9d 4634
e0639dc5
OK		 4635 if (sync)
4636 *p++ = cpu_to_be32(0);
4637 else {
4638 __be32 nfserr;
4639 *p++ = cpu_to_be32(1);
4640 nfserr = nfsd4_encode_stateid(&resp->xdr, &write->cb_stateid);
4641 if (nfserr)
4642 return nfserr;
4643 }
4644 p = xdr_reserve_space(&resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE);
29ae7f9d
AS		 4645 if (!p)
4646 return nfserr_resource;
4647
29ae7f9d
AS		 4648 p = xdr_encode_hyper(p, write->wr_bytes_written);
4649 *p++ = cpu_to_be32(write->wr_stable_how);
4650 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4651 NFS4_VERIFIER_SIZE);
4652 return nfs_ok;
4653}
4654
51911868
OK		 4655static __be32
4656nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns)
4657{
4658 struct xdr_stream *xdr = &resp->xdr;
4659 struct nfs42_netaddr *addr;
4660 __be32 *p;
4661
4662 p = xdr_reserve_space(xdr, 4);
4663 *p++ = cpu_to_be32(ns->nl4_type);
4664
4665 switch (ns->nl4_type) {
4666 case NL4_NETADDR:
4667 addr = &ns->u.nl4_addr;
4668
4669 /* netid_len, netid, uaddr_len, uaddr (port included
4670 * in RPCBIND_MAXUADDRLEN)
4671 */
4672 p = xdr_reserve_space(xdr,
4673 4 /* netid len */ +
4674 (XDR_QUADLEN(addr->netid_len) * 4) +
4675 4 /* uaddr len */ +
4676 (XDR_QUADLEN(addr->addr_len) * 4));
4677 if (!p)
4678 return nfserr_resource;
4679
4680 *p++ = cpu_to_be32(addr->netid_len);
4681 p = xdr_encode_opaque_fixed(p, addr->netid,
4682 addr->netid_len);
4683 *p++ = cpu_to_be32(addr->addr_len);
4684 p = xdr_encode_opaque_fixed(p, addr->addr,
4685 addr->addr_len);
4686 break;
4687 default:
4688 WARN_ON_ONCE(ns->nl4_type != NL4_NETADDR);
4689 return nfserr_inval;
4690 }
4691
4692 return 0;
4693}
4694
29ae7f9d
AS		 4695static __be32
4696nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4697 struct nfsd4_copy *copy)
4698{
4699 __be32 *p;
4700
e0639dc5 4701 nfserr = nfsd42_encode_write_res(resp, &copy->cp_res,
e8febea7 4702 !!copy->cp_synchronous);
bac966d6
BF		 4703 if (nfserr)
4704 return nfserr;
29ae7f9d 4705
bac966d6 4706 p = xdr_reserve_space(&resp->xdr, 4 + 4);
edcc8452 4707 *p++ = xdr_one; /* cr_consecutive */
bac966d6
BF		 4708 *p++ = cpu_to_be32(copy->cp_synchronous);
4709 return 0;
29ae7f9d
AS		 4710}
4711
6308bc98
OK		 4712static __be32
4713nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
4714 struct nfsd4_offload_status *os)
4715{
4716 struct xdr_stream *xdr = &resp->xdr;
4717 __be32 *p;
4718
4719 p = xdr_reserve_space(xdr, 8 + 4);
4720 if (!p)
4721 return nfserr_resource;
4722 p = xdr_encode_hyper(p, os->count);
4723 *p++ = cpu_to_be32(0);
528b8493
AS		 4724 return nfserr;
4725}
4726
4727static __be32
4728nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp,
4729 struct nfsd4_read *read,
9f0b5792
AS		 4730 unsigned long *maxcount, u32 *eof,
4731 loff_t *pos)
528b8493
AS		 4732{
4733 struct xdr_stream *xdr = &resp->xdr;
4734 struct file *file = read->rd_nf->nf_file;
4735 int starting_len = xdr->buf->len;
9f0b5792 4736 loff_t hole_pos;
528b8493
AS		 4737 __be32 nfserr;
4738 __be32 *p, tmp;
4739 __be64 tmp64;
4740
9f0b5792 4741 hole_pos = pos ? *pos : vfs_llseek(file, read->rd_offset, SEEK_HOLE);
2db27992 4742 if (hole_pos > read->rd_offset)
278765ea
AS		 4743 *maxcount = min_t(unsigned long, *maxcount, hole_pos - read->rd_offset);
4744 *maxcount = min_t(unsigned long, *maxcount, (xdr->buf->buflen - xdr->buf->len));
528b8493
AS		 4745
4746 /* Content type, offset, byte count */
4747 p = xdr_reserve_space(xdr, 4 + 8 + 4);
4748 if (!p)
4749 return nfserr_resource;
4750
278765ea 4751 read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, *maxcount);
528b8493
AS		 4752 if (read->rd_vlen < 0)
4753 return nfserr_resource;
4754
4755 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
278765ea 4756 resp->rqstp->rq_vec, read->rd_vlen, maxcount, eof);
528b8493
AS		 4757 if (nfserr)
4758 return nfserr;
72d78717 4759 xdr_truncate_encode(xdr, starting_len + 16 + xdr_align_size(*maxcount));
528b8493
AS		 4760
4761 tmp = htonl(NFS4_CONTENT_DATA);
4762 write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
4763 tmp64 = cpu_to_be64(read->rd_offset);
4764 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp64, 8);
278765ea 4765 tmp = htonl(*maxcount);
528b8493 4766 write_bytes_to_xdr_buf(xdr->buf, starting_len + 12, &tmp, 4);
72d78717
TM		 4767
4768 tmp = xdr_zero;
4769 write_bytes_to_xdr_buf(xdr->buf, starting_len + 16 + *maxcount, &tmp,
4770 xdr_pad_size(*maxcount));
528b8493
AS		 4771 return nfs_ok;
4772}
4773
2db27992
AS		 4774static __be32
4775nfsd4_encode_read_plus_hole(struct nfsd4_compoundres *resp,
4776 struct nfsd4_read *read,
278765ea 4777 unsigned long *maxcount, u32 *eof)
2db27992
AS		 4778{
4779 struct file *file = read->rd_nf->nf_file;
278765ea 4780 loff_t data_pos = vfs_llseek(file, read->rd_offset, SEEK_DATA);
9f0b5792 4781 loff_t f_size = i_size_read(file_inode(file));
278765ea 4782 unsigned long count;
2db27992
AS		 4783 __be32 *p;
4784
278765ea 4785 if (data_pos == -ENXIO)
9f0b5792
AS		 4786 data_pos = f_size;
4787 else if (data_pos <= read->rd_offset || (data_pos < f_size && data_pos % PAGE_SIZE))
4788 return nfsd4_encode_read_plus_data(resp, read, maxcount, eof, &f_size);
278765ea
AS		 4789 count = data_pos - read->rd_offset;
4790
2db27992
AS		 4791 /* Content type, offset, byte count */
4792 p = xdr_reserve_space(&resp->xdr, 4 + 8 + 8);
4793 if (!p)
4794 return nfserr_resource;
4795
4796 *p++ = htonl(NFS4_CONTENT_HOLE);
4797 p = xdr_encode_hyper(p, read->rd_offset);
278765ea 4798 p = xdr_encode_hyper(p, count);
2db27992 4799
9f0b5792 4800 *eof = (read->rd_offset + count) >= f_size;
278765ea 4801 *maxcount = min_t(unsigned long, count, *maxcount);
2db27992
AS		 4802 return nfs_ok;
4803}
4804
528b8493
AS		 4805static __be32
4806nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr,
4807 struct nfsd4_read *read)
4808{
278765ea 4809 unsigned long maxcount, count;
528b8493
AS		 4810 struct xdr_stream *xdr = &resp->xdr;
4811 struct file *file;
4812 int starting_len = xdr->buf->len;
9f0b5792 4813 int last_segment = xdr->buf->len;
528b8493
AS		 4814 int segments = 0;
4815 __be32 *p, tmp;
9f0b5792 4816 bool is_data;
2db27992 4817 loff_t pos;
528b8493
AS		 4818 u32 eof;
4819
4820 if (nfserr)
4821 return nfserr;
4822 file = read->rd_nf->nf_file;
4823
4824 /* eof flag, segment count */
4825 p = xdr_reserve_space(xdr, 4 + 4);
4826 if (!p)
4827 return nfserr_resource;
4828 xdr_commit_encode(xdr);
4829
4830 maxcount = svc_max_payload(resp->rqstp);
4831 maxcount = min_t(unsigned long, maxcount,
4832 (xdr->buf->buflen - xdr->buf->len));
4833 maxcount = min_t(unsigned long, maxcount, read->rd_length);
278765ea 4834 count = maxcount;
528b8493
AS		 4835
4836 eof = read->rd_offset >= i_size_read(file_inode(file));
2db27992
AS		 4837 if (eof)
4838 goto out;
4839
9f0b5792
AS		 4840 pos = vfs_llseek(file, read->rd_offset, SEEK_HOLE);
4841 is_data = pos > read->rd_offset;
2db27992 4842
9f0b5792 4843 while (count > 0 && !eof) {
278765ea 4844 maxcount = count;
9f0b5792
AS		 4845 if (is_data)
4846 nfserr = nfsd4_encode_read_plus_data(resp, read, &maxcount, &eof,
4847 segments == 0 ? &pos : NULL);
4848 else
4849 nfserr = nfsd4_encode_read_plus_hole(resp, read, &maxcount, &eof);
278765ea
AS		 4850 if (nfserr)
4851 goto out;
4852 count -= maxcount;
4853 read->rd_offset += maxcount;
9f0b5792
AS		 4854 is_data = !is_data;
4855 last_segment = xdr->buf->len;
528b8493
AS		 4856 segments++;
4857 }
4858
2db27992 4859out:
278765ea 4860 if (nfserr && segments == 0)
528b8493
AS		 4861 xdr_truncate_encode(xdr, starting_len);
4862 else {
9f0b5792
AS		 4863 if (nfserr) {
4864 xdr_truncate_encode(xdr, last_segment);
4865 nfserr = nfs_ok;
b68f0cbd 4866 eof = 0;
9f0b5792 4867 }
b68f0cbd
TM		 4868 tmp = htonl(eof);
4869 write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
4870 tmp = htonl(segments);
4871 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
528b8493 4872 }
6308bc98
OK		 4873
4874 return nfserr;
4875}
4876
51911868
OK		 4877static __be32
4878nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr,
4879 struct nfsd4_copy_notify *cn)
4880{
4881 struct xdr_stream *xdr = &resp->xdr;
4882 __be32 *p;
4883
4884 if (nfserr)
4885 return nfserr;
4886
4887 /* 8 sec, 4 nsec */
4888 p = xdr_reserve_space(xdr, 12);
4889 if (!p)
4890 return nfserr_resource;
4891
4892 /* cnr_lease_time */
4893 p = xdr_encode_hyper(p, cn->cpn_sec);
4894 *p++ = cpu_to_be32(cn->cpn_nsec);
4895
4896 /* cnr_stateid */
4897 nfserr = nfsd4_encode_stateid(xdr, &cn->cpn_cnr_stateid);
4898 if (nfserr)
4899 return nfserr;
4900
4901 /* cnr_src.nl_nsvr */
4902 p = xdr_reserve_space(xdr, 4);
4903 if (!p)
4904 return nfserr_resource;
4905
4906 *p++ = cpu_to_be32(1);
4907
4908 return nfsd42_encode_nl4_server(resp, &cn->cpn_src);
4909}
4910
24bab491
AS		 4911static __be32
4912nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4913 struct nfsd4_seek *seek)
4914{
4915 __be32 *p;
4916
24bab491
AS		 4917 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4918 *p++ = cpu_to_be32(seek->seek_eof);
4919 p = xdr_encode_hyper(p, seek->seek_pos);
4920
bac966d6 4921 return 0;
24bab491
AS		 4922}
4923
695e12f8
BH		 4924static __be32
4925nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4926{
4927 return nfserr;
4928}
4929
23e50fe3
FL		 4930/*
4931 * Encode kmalloc-ed buffer in to XDR stream.
4932 */
b9a49237 4933static __be32
23e50fe3
FL		 4934nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen)
4935{
4936 u32 cplen;
4937 __be32 *p;
4938
4939 cplen = min_t(unsigned long, buflen,
4940 ((void *)xdr->end - (void *)xdr->p));
4941 p = xdr_reserve_space(xdr, cplen);
4942 if (!p)
4943 return nfserr_resource;
4944
4945 memcpy(p, buf, cplen);
4946 buf += cplen;
4947 buflen -= cplen;
4948
4949 while (buflen) {
4950 cplen = min_t(u32, buflen, PAGE_SIZE);
4951 p = xdr_reserve_space(xdr, cplen);
4952 if (!p)
4953 return nfserr_resource;
4954
4955 memcpy(p, buf, cplen);
4956
4957 if (cplen < PAGE_SIZE) {
4958 /*
4959 * We're done, with a length that wasn't page
4960 * aligned, so possibly not word aligned. Pad
4961 * any trailing bytes with 0.
4962 */
4963 xdr_encode_opaque_fixed(p, NULL, cplen);
4964 break;
4965 }
4966
4967 buflen -= PAGE_SIZE;
4968 buf += PAGE_SIZE;
4969 }
4970
4971 return 0;
4972}
4973
4974static __be32
4975nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
4976 struct nfsd4_getxattr *getxattr)
4977{
4978 struct xdr_stream *xdr = &resp->xdr;
4979 __be32 *p, err;
4980
4981 p = xdr_reserve_space(xdr, 4);
4982 if (!p)
4983 return nfserr_resource;
4984
4985 *p = cpu_to_be32(getxattr->getxa_len);
4986
4987 if (getxattr->getxa_len == 0)
4988 return 0;
4989
4990 err = nfsd4_vbuf_to_stream(xdr, getxattr->getxa_buf,
4991 getxattr->getxa_len);
4992
4993 kvfree(getxattr->getxa_buf);
4994
4995 return err;
4996}
4997
4998static __be32
4999nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5000 struct nfsd4_setxattr *setxattr)
5001{
5002 struct xdr_stream *xdr = &resp->xdr;
5003 __be32 *p;
5004
5005 p = xdr_reserve_space(xdr, 20);
5006 if (!p)
5007 return nfserr_resource;
5008
5009 encode_cinfo(p, &setxattr->setxa_cinfo);
5010
5011 return 0;
5012}
5013
5014/*
5015 * See if there are cookie values that can be rejected outright.
5016 */
5017static __be32
5018nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs,
5019 u32 *offsetp)
5020{
5021 u64 cookie = listxattrs->lsxa_cookie;
5022
5023 /*
5024 * If the cookie is larger than the maximum number we can fit
5025 * in either the buffer we just got back from vfs_listxattr, or,
5026 * XDR-encoded, in the return buffer, it's invalid.
5027 */
5028 if (cookie > (listxattrs->lsxa_len) / (XATTR_USER_PREFIX_LEN + 2))
5029 return nfserr_badcookie;
5030
5031 if (cookie > (listxattrs->lsxa_maxcount /
5032 (XDR_QUADLEN(XATTR_USER_PREFIX_LEN + 2) + 4)))
5033 return nfserr_badcookie;
5034
5035 *offsetp = (u32)cookie;
5036 return 0;
5037}
5038
5039static __be32
5040nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
5041 struct nfsd4_listxattrs *listxattrs)
5042{
5043 struct xdr_stream *xdr = &resp->xdr;
5044 u32 cookie_offset, count_offset, eof;
5045 u32 left, xdrleft, slen, count;
5046 u32 xdrlen, offset;
5047 u64 cookie;
5048 char *sp;
b9a49237 5049 __be32 status, tmp;
23e50fe3
FL		 5050 __be32 *p;
5051 u32 nuser;
5052
5053 eof = 1;
5054
5055 status = nfsd4_listxattr_validate_cookie(listxattrs, &offset);
5056 if (status)
5057 goto out;
5058
5059 /*
5060 * Reserve space for the cookie and the name array count. Record
5061 * the offsets to save them later.
5062 */
5063 cookie_offset = xdr->buf->len;
5064 count_offset = cookie_offset + 8;
5065 p = xdr_reserve_space(xdr, 12);
5066 if (!p) {
5067 status = nfserr_resource;
5068 goto out;
5069 }
5070
5071 count = 0;
5072 left = listxattrs->lsxa_len;
5073 sp = listxattrs->lsxa_buf;
5074 nuser = 0;
5075
5076 xdrleft = listxattrs->lsxa_maxcount;
5077
5078 while (left > 0 && xdrleft > 0) {
5079 slen = strlen(sp);
5080
5081 /*
4cce11fa 5082 * Check if this is a "user." attribute, skip it if not.
23e50fe3
FL		 5083 */
5084 if (strncmp(sp, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
5085 goto contloop;
5086
5087 slen -= XATTR_USER_PREFIX_LEN;
5088 xdrlen = 4 + ((slen + 3) & ~3);
5089 if (xdrlen > xdrleft) {
5090 if (count == 0) {
5091 /*
5092 * Can't even fit the first attribute name.
5093 */
5094 status = nfserr_toosmall;
5095 goto out;
5096 }
5097 eof = 0;
5098 goto wreof;
5099 }
5100
5101 left -= XATTR_USER_PREFIX_LEN;
5102 sp += XATTR_USER_PREFIX_LEN;
5103 if (nuser++ < offset)
5104 goto contloop;
5105
5106
5107 p = xdr_reserve_space(xdr, xdrlen);
5108 if (!p) {
5109 status = nfserr_resource;
5110 goto out;
5111 }
5112
e2a1840e 5113 xdr_encode_opaque(p, sp, slen);
23e50fe3
FL		 5114
5115 xdrleft -= xdrlen;
5116 count++;
5117contloop:
5118 sp += slen + 1;
5119 left -= slen + 1;
5120 }
5121
5122 /*
5123 * If there were user attributes to copy, but we didn't copy
5124 * any, the offset was too large (e.g. the cookie was invalid).
5125 */
5126 if (nuser > 0 && count == 0) {
5127 status = nfserr_badcookie;
5128 goto out;
5129 }
5130
5131wreof:
5132 p = xdr_reserve_space(xdr, 4);
5133 if (!p) {
5134 status = nfserr_resource;
5135 goto out;
5136 }
5137 *p = cpu_to_be32(eof);
5138
5139 cookie = offset + count;
5140
5141 write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &cookie, 8);
b9a49237
CL		 5142 tmp = cpu_to_be32(count);
5143 write_bytes_to_xdr_buf(xdr->buf, count_offset, &tmp, 4);
23e50fe3
FL		 5144out:
5145 if (listxattrs->lsxa_len)
5146 kvfree(listxattrs->lsxa_buf);
5147 return status;
5148}
5149
5150static __be32
5151nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5152 struct nfsd4_removexattr *removexattr)
5153{
5154 struct xdr_stream *xdr = &resp->xdr;
5155 __be32 *p;
5156
5157 p = xdr_reserve_space(xdr, 20);
5158 if (!p)
5159 return nfserr_resource;
5160
5161 p = encode_cinfo(p, &removexattr->rmxa_cinfo);
5162 return 0;
5163}
5164
695e12f8
BH		 5165typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
5166
2db134eb
AA		 5167/*
5168 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
5169 * since we don't need to filter out obsolete ops as this is
5170 * done in the decoding phase.
5171 */
c1df609d 5172static const nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 5173 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
5174 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
5175 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
5176 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
5177 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
5178 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
5179 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
5180 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
5181 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
5182 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
5183 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
5184 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
5185 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
5186 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
5187 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
5188 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 5189 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 5190 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
5191 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
5192 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
5193 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
5194 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
5195 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
5196 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
5197 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
5198 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
5199 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
5200 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
5201 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
5202 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
5203 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
5204 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
5205 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
5206 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
5207 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
5208 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
5209 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 5210
5211 /* NFSv4.1 operations */
5212 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 5213 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 5214 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
5215 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 5216 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
5217 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb 5218 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc
CH		 5219#ifdef CONFIG_NFSD_PNFS
5220 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
5221 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
5222 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
5223 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
5224 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
5225#else
2db134eb
AA		 5226 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
5227 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
5228 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
5229 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
5230 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc 5231#endif
22b6dee8 5232 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 5233 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
5234 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 5235 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 5236 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
5237 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
5238 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
87a15a80
AS		 5239
5240 /* NFSv4.2 operations */
5241 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
29ae7f9d 5242 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
51911868 5243 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_copy_notify,
87a15a80
AS		 5244 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
5245 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
5246 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
5247 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
5248 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
6308bc98 5249 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status,
528b8493 5250 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_read_plus,
24bab491 5251 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
87a15a80 5252 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
ffa0160a 5253 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
23e50fe3
FL		 5254
5255 /* RFC 8276 extended atributes operations */
5256 [OP_GETXATTR] = (nfsd4_enc)nfsd4_encode_getxattr,
5257 [OP_SETXATTR] = (nfsd4_enc)nfsd4_encode_setxattr,
5258 [OP_LISTXATTRS] = (nfsd4_enc)nfsd4_encode_listxattrs,
5259 [OP_REMOVEXATTR] = (nfsd4_enc)nfsd4_encode_removexattr,
695e12f8
BH		 5260};
5261
496c262c 5262/*
a8095f7e
BF		 5263 * Calculate whether we still have space to encode repsize bytes.
5264 * There are two considerations:
5265 * - For NFS versions >=4.1, the size of the reply must stay within
5266 * session limits
5267 * - For all NFS versions, we must stay within limited preallocated
5268 * buffer space.
496c262c 5269 *
a8095f7e
BF		 5270 * This is called before the operation is processed, so can only provide
5271 * an upper estimate. For some nonidempotent operations (such as
5272 * getattr), it's not necessarily a problem if that estimate is wrong,
5273 * as we can fail it after processing without significant side effects.
496c262c 5274 */
a8095f7e 5275__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 5276{
67492c99 5277 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 5278 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 5279
47ee5298
BF		 5280 if (buf->len + respsize <= buf->buflen)
5281 return nfs_ok;
5282 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 5283 return nfserr_resource;
47ee5298
BF		 5284 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
5285 WARN_ON_ONCE(1);
5286 return nfserr_rep_too_big_to_cache;
ea8d7720 5287 }
47ee5298 5288 return nfserr_rep_too_big;
496c262c
AA		 5289}
5290
1da177e4
LT		 5291void
5292nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
5293{
082d4bd7 5294 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 5295 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 5296 struct svc_rqst *rqstp = resp->rqstp;
34b1744c 5297 const struct nfsd4_operation *opdesc = op->opdesc;
082d4bd7 5298 int post_err_offset;
07d1f802 5299 nfsd4_enc encoder;
bc749ca4 5300 __be32 *p;
1da177e4 5301
d0a381dd
BF		 5302 p = xdr_reserve_space(xdr, 8);
5303 if (!p) {
5304 WARN_ON_ONCE(1);
5305 return;
5306 }
c373b0a4 5307 *p++ = cpu_to_be32(op->opnum);
082d4bd7 5308 post_err_offset = xdr->buf->len;
1da177e4 5309
695e12f8
BH		 5310 if (op->opnum == OP_ILLEGAL)
5311 goto status;
b7571e4c
BF		 5312 if (op->status && opdesc &&
5313 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
5314 goto status;
3a237b4a 5315 BUG_ON(op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
695e12f8 5316 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 5317 encoder = nfsd4_enc_ops[op->opnum];
5318 op->status = encoder(resp, op->status, &op->u);
08281341
CL		 5319 if (op->status)
5320 trace_nfsd_compound_encode_err(rqstp, op->opnum, op->status);
34b1744c
BF		 5321 if (opdesc && opdesc->op_release)
5322 opdesc->op_release(&op->u);
2825a7f9
BF		 5323 xdr_commit_encode(xdr);
5324
067e1ace 5325 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 5326 if (!op->status) {
5327 int space_needed = 0;
5328 if (!nfsd4_last_compound_op(rqstp))
5329 space_needed = COMPOUND_ERR_SLACK_SPACE;
5330 op->status = nfsd4_check_resp_size(resp, space_needed);
5331 }
c8f13d97
BF		 5332 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
5333 struct nfsd4_slot *slot = resp->cstate.slot;
5334
5335 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
5336 op->status = nfserr_rep_too_big_to_cache;
5337 else
5338 op->status = nfserr_rep_too_big;
5339 }
07d1f802
BF		 5340 if (op->status == nfserr_resource ||
5341 op->status == nfserr_rep_too_big ||
5342 op->status == nfserr_rep_too_big_to_cache) {
5343 /*
5344 * The operation may have already been encoded or
5345 * partially encoded. No op returns anything additional
5346 * in the case of one of these three errors, so we can
5347 * just truncate back to after the status. But it's a
5348 * bug if we had to do this on a non-idempotent op:
5349 */
5350 warn_on_nonidempotent_op(op);
082d4bd7 5351 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 5352 }
9411b1d4 5353 if (so) {
082d4bd7
BF		 5354 int len = xdr->buf->len - post_err_offset;
5355
9411b1d4 5356 so->so_replay.rp_status = op->status;
082d4bd7
BF		 5357 so->so_replay.rp_buflen = len;
5358 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
5359 so->so_replay.rp_buf, len);
9411b1d4 5360 }
695e12f8 5361status:
082d4bd7
BF		 5362 /* Note that op->status is already in network byte order: */
5363 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 5364}
5365
5366/*
5367 * Encode the reply stored in the stateowner reply cache
5368 *
5369 * XDR note: do not encode rp->rp_buflen: the buffer contains the
5370 * previously sent already encoded operation.
1da177e4
LT		 5371 */
5372void
d0a381dd 5373nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 5374{
bc749ca4 5375 __be32 *p;
1da177e4
LT		 5376 struct nfs4_replay *rp = op->replay;
5377
d0a381dd
BF		 5378 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
5379 if (!p) {
5380 WARN_ON_ONCE(1);
5381 return;
5382 }
c373b0a4 5383 *p++ = cpu_to_be32(op->opnum);
1da177e4 5384 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 5385
0c0c267b 5386 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 5387}
5388
8537488b 5389void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
1da177e4 5390{
3e98abff
BF		 5391 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5392
1da177e4
LT		 5393 if (args->ops != args->iops) {
5394 kfree(args->ops);
5395 args->ops = args->iops;
5396 }
1da177e4 5397 while (args->to_free) {
d5e23383 5398 struct svcxdr_tmpbuf *tb = args->to_free;
1da177e4 5399 args->to_free = tb->next;
1da177e4
LT		 5400 kfree(tb);
5401 }
5402}
5403
5404int
026fec7e 5405nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
1da177e4 5406{
026fec7e
CH		 5407 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5408
c1346a12 5409 /* svcxdr_tmp_alloc */
1da177e4 5410 args->to_free = NULL;
c1346a12
CL		 5411
5412 args->xdr = &rqstp->rq_arg_stream;
1da177e4
LT		 5413 args->ops = args->iops;
5414 args->rqstp = rqstp;
5415
d9b74bda 5416 return nfsd4_decode_compound(args);
1da177e4
LT		 5417}
5418
5419int
63f8de37 5420nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
1da177e4 5421{
63f8de37 5422 struct nfsd4_compoundres *resp = rqstp->rq_resp;
6ac90391
BF		 5423 struct xdr_buf *buf = resp->xdr.buf;
5424
5425 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
5426 buf->tail[0].iov_len);
dd97fdde 5427
cc028a10
CL		 5428 *p = resp->cstate.status;
5429
2825a7f9
BF		 5430 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
5431
1da177e4
LT		 5432 p = resp->tagp;
5433 *p++ = htonl(resp->taglen);
5434 memcpy(p, resp->tag, resp->taglen);
5435 p += XDR_QUADLEN(resp->taglen);
5436 *p++ = htonl(resp->opcnt);
5437
b607664e 5438 nfsd4_sequence_done(resp);
1da177e4
LT		 5439 return 1;
5440}
5441
5442/*
5443 * Local variables:
5444 * c-basic-offset: 8
5445 * End:
5446 */
Michael's Linux tree.