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Merge tag 'for-5.4-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
[linux-2.6-block.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1da177e4
LT		 34 */
35
96bcad50 36#include <linux/file.h>
5a0e3ad6 37#include <linux/slab.h>
1da177e4 38#include <linux/namei.h>
341eb184 39#include <linux/statfs.h>
0733d213 40#include <linux/utsname.h>
17456804 41#include <linux/pagemap.h>
4796f457 42#include <linux/sunrpc/svcauth_gss.h>
9a74af21 43
2ca72e17
BF		 44#include "idmap.h"
45#include "acl.h"
9a74af21 46#include "xdr4.h"
0a3adade 47#include "vfs.h"
17456804 48#include "state.h"
1091006c 49#include "cache.h"
3d733711 50#include "netns.h"
9cf514cc 51#include "pnfs.h"
5c4583b2 52#include "filecache.h"
2ca72e17 53
18032ca0
DQ		 54#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
55#include <linux/security.h>
56#endif
57
58
1da177e4
LT		 59#define NFSDDBG_FACILITY NFSDDBG_XDR
60
5cf23dbb 61const u32 nfsd_suppattrs[3][3] = {
916d2d84
BF		 62 {NFSD4_SUPPORTED_ATTRS_WORD0,
63 NFSD4_SUPPORTED_ATTRS_WORD1,
64 NFSD4_SUPPORTED_ATTRS_WORD2},
65
66 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
67 NFSD4_1_SUPPORTED_ATTRS_WORD1,
68 NFSD4_1_SUPPORTED_ATTRS_WORD2},
69
70 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
71 NFSD4_1_SUPPORTED_ATTRS_WORD1,
72 NFSD4_2_SUPPORTED_ATTRS_WORD2},
73};
74
42ca0993
BF		 75/*
76 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
77 * directory in order to indicate to the client that a filesystem boundary is present
78 * We use a fixed fsid for a referral
79 */
80#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
81#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
82
b37ad28b 83static __be32
a36b1725 84check_filename(char *str, int len)
1da177e4
LT		 85{
86 int i;
87
88 if (len == 0)
89 return nfserr_inval;
90 if (isdotent(str, len))
a36b1725 91 return nfserr_badname;
1da177e4
LT		 92 for (i = 0; i < len; i++)
93 if (str[i] == '/')
a36b1725 94 return nfserr_badname;
1da177e4
LT		 95 return 0;
96}
97
1da177e4 98#define DECODE_HEAD \
2ebbc012 99 __be32 *p; \
b37ad28b 100 __be32 status
1da177e4
LT		 101#define DECODE_TAIL \
102 status = 0; \
103out: \
104 return status; \
105xdr_error: \
817cb9d4
CL		 106 dprintk("NFSD: xdr error (%s:%d)\n", \
107 __FILE__, __LINE__); \
1da177e4
LT		 108 status = nfserr_bad_xdr; \
109 goto out
110
1da177e4
LT		 111#define READMEM(x,nbytes) do { \
112 x = (char *)p; \
113 p += XDR_QUADLEN(nbytes); \
114} while (0)
115#define SAVEMEM(x,nbytes) do { \
116 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
117 savemem(argp, p, nbytes) : \
118 (char *)p)) { \
817cb9d4
CL		 119 dprintk("NFSD: xdr error (%s:%d)\n", \
120 __FILE__, __LINE__); \
1da177e4
LT		 121 goto xdr_error; \
122 } \
123 p += XDR_QUADLEN(nbytes); \
124} while (0)
125#define COPYMEM(x,nbytes) do { \
126 memcpy((x), p, nbytes); \
127 p += XDR_QUADLEN(nbytes); \
128} while (0)
129
130/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
131#define READ_BUF(nbytes) do { \
132 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
133 p = argp->p; \
134 argp->p += XDR_QUADLEN(nbytes); \
135 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 136 dprintk("NFSD: xdr error (%s:%d)\n", \
137 __FILE__, __LINE__); \
1da177e4
LT		 138 goto xdr_error; \
139 } \
140} while (0)
141
590b7431
BF		 142static void next_decode_page(struct nfsd4_compoundargs *argp)
143{
590b7431 144 argp->p = page_address(argp->pagelist[0]);
365da4ad 145 argp->pagelist++;
590b7431 146 if (argp->pagelen < PAGE_SIZE) {
fc788f64 147 argp->end = argp->p + XDR_QUADLEN(argp->pagelen);
590b7431
BF		 148 argp->pagelen = 0;
149 } else {
150 argp->end = argp->p + (PAGE_SIZE>>2);
151 argp->pagelen -= PAGE_SIZE;
152 }
153}
154
ca2a05aa 155static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 156{
157 /* We want more bytes than seem to be available.
158 * Maybe we need a new page, maybe we have just run out
159 */
ca2a05aa 160 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 161 __be32 *p;
eae03e2a
CL		 162
163 if (argp->pagelen == 0) {
164 struct kvec *vec = &argp->rqstp->rq_arg.tail[0];
165
166 if (!argp->tail) {
167 argp->tail = true;
168 avail = vec->iov_len;
169 argp->p = vec->iov_base;
170 argp->end = vec->iov_base + avail;
171 }
172
173 if (avail < nbytes)
174 return NULL;
175
176 p = argp->p;
177 argp->p += XDR_QUADLEN(nbytes);
178 return p;
179 }
180
1da177e4
LT		 181 if (avail + argp->pagelen < nbytes)
182 return NULL;
183 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
184 return NULL;
185 /* ok, we can do it with the current plus the next page */
186 if (nbytes <= sizeof(argp->tmp))
187 p = argp->tmp;
188 else {
f99d49ad 189 kfree(argp->tmpp);
1da177e4
LT		 190 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
191 if (!p)
192 return NULL;
193
194 }
ca2a05aa
BF		 195 /*
196 * The following memcpy is safe because read_buf is always
197 * called with nbytes > avail, and the two cases above both
198 * guarantee p points to at least nbytes bytes.
199 */
1da177e4 200 memcpy(p, argp->p, avail);
590b7431 201 next_decode_page(argp);
1da177e4
LT		 202 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
203 argp->p += XDR_QUADLEN(nbytes - avail);
204 return p;
205}
206
2b86e3aa
BF		 207static unsigned int compoundargs_bytes_left(struct nfsd4_compoundargs *argp)
208{
209 unsigned int this = (char *)argp->end - (char *)argp->p;
210
211 return this + argp->pagelen;
212}
213
60adfc50
AA		 214static int zero_clientid(clientid_t *clid)
215{
216 return (clid->cl_boot == 0) && (clid->cl_id == 0);
217}
218
2d8498db 219/**
d5e23383 220 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
ce043ac8 221 * @argp: NFSv4 compound argument structure
ed992753 222 * @len: length of buffer to allocate
2d8498db 223 *
ed992753
TM		 224 * Allocates a buffer of size @len to be freed when processing the compound
225 * operation described in @argp finishes.
2d8498db 226 */
d5e23383
BF		 227static void *
228svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
1da177e4 229{
d5e23383 230 struct svcxdr_tmpbuf *tb;
1da177e4 231
d5e23383 232 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
1da177e4 233 if (!tb)
d5e23383 234 return NULL;
1da177e4
LT		 235 tb->next = argp->to_free;
236 argp->to_free = tb;
d5e23383 237 return tb->buf;
1da177e4
LT		 238}
239
29c353b3
BF		 240/*
241 * For xdr strings that need to be passed to other kernel api's
242 * as null-terminated strings.
243 *
244 * Note null-terminating in place usually isn't safe since the
245 * buffer might end on a page boundary.
246 */
247static char *
248svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
249{
d5e23383 250 char *p = svcxdr_tmpalloc(argp, len + 1);
29c353b3
BF		 251
252 if (!p)
253 return NULL;
254 memcpy(p, buf, len);
255 p[len] = '\0';
29c353b3 256 return p;
1da177e4
LT		 257}
258
2d8498db
CH		 259/**
260 * savemem - duplicate a chunk of memory for later processing
261 * @argp: NFSv4 compound argument structure to be freed with
262 * @p: pointer to be duplicated
263 * @nbytes: length to be duplicated
264 *
265 * Returns a pointer to a copy of @nbytes bytes of memory at @p
266 * that are preserved until processing of the NFSv4 compound
267 * operation described by @argp finishes.
268 */
2ebbc012 269static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 270{
d5e23383
BF		 271 void *ret;
272
273 ret = svcxdr_tmpalloc(argp, nbytes);
274 if (!ret)
1da177e4 275 return NULL;
d5e23383
BF		 276 memcpy(ret, p, nbytes);
277 return ret;
1da177e4
LT		 278}
279
4c94e13e 280static __be32
bdba5368 281nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
4c94e13e
CH		 282{
283 DECODE_HEAD;
4c94e13e
CH		 284
285 READ_BUF(12);
bdba5368 286 p = xdr_decode_hyper(p, &tv->tv_sec);
4c94e13e
CH		 287 tv->tv_nsec = be32_to_cpup(p++);
288 if (tv->tv_nsec >= (u32)1000000000)
289 return nfserr_inval;
290
291 DECODE_TAIL;
292}
293
b37ad28b 294static __be32
1da177e4
LT		 295nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
296{
297 u32 bmlen;
298 DECODE_HEAD;
299
300 bmval[0] = 0;
301 bmval[1] = 0;
7e705706 302 bmval[2] = 0;
1da177e4
LT		 303
304 READ_BUF(4);
06553991 305 bmlen = be32_to_cpup(p++);
1da177e4
LT		 306 if (bmlen > 1000)
307 goto xdr_error;
308
309 READ_BUF(bmlen << 2);
310 if (bmlen > 0)
06553991 311 bmval[0] = be32_to_cpup(p++);
1da177e4 312 if (bmlen > 1)
06553991 313 bmval[1] = be32_to_cpup(p++);
7e705706 314 if (bmlen > 2)
06553991 315 bmval[2] = be32_to_cpup(p++);
1da177e4
LT		 316
317 DECODE_TAIL;
318}
319
b37ad28b 320static __be32
3c8e0316 321nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0 322 struct iattr *iattr, struct nfs4_acl **acl,
47057abd 323 struct xdr_netobj *label, int *umask)
1da177e4
LT		 324{
325 int expected_len, len = 0;
326 u32 dummy32;
327 char *buf;
328
329 DECODE_HEAD;
330 iattr->ia_valid = 0;
331 if ((status = nfsd4_decode_bitmap(argp, bmval)))
332 return status;
333
e864c189
BF		 334 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
335 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
336 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
337 if (nfsd_attrs_supported(argp->minorversion, bmval))
338 return nfserr_inval;
339 return nfserr_attrnotsupp;
340 }
341
1da177e4 342 READ_BUF(4);
06553991 343 expected_len = be32_to_cpup(p++);
1da177e4
LT		 344
345 if (bmval[0] & FATTR4_WORD0_SIZE) {
346 READ_BUF(8);
347 len += 8;
542d1ab3 348 p = xdr_decode_hyper(p, &iattr->ia_size);
1da177e4
LT		 349 iattr->ia_valid |= ATTR_SIZE;
350 }
351 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 352 u32 nace;
28e05dd8 353 struct nfs4_ace *ace;
1da177e4
LT		 354
355 READ_BUF(4); len += 4;
06553991 356 nace = be32_to_cpup(p++);
1da177e4 357
2b86e3aa
BF		 358 if (nace > compoundargs_bytes_left(argp)/20)
359 /*
360 * Even with 4-byte names there wouldn't be
361 * space for that many aces; something fishy is
362 * going on:
363 */
798df338 364 return nfserr_fbig;
28e05dd8 365
d5e23383 366 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
eba1c99c
KM		 367 if (*acl == NULL)
368 return nfserr_jukebox;
369
28e05dd8
BF		 370 (*acl)->naces = nace;
371 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 372 READ_BUF(16); len += 16;
06553991
BF		 373 ace->type = be32_to_cpup(p++);
374 ace->flag = be32_to_cpup(p++);
375 ace->access_mask = be32_to_cpup(p++);
376 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 377 READ_BUF(dummy32);
378 len += XDR_QUADLEN(dummy32) << 2;
379 READMEM(buf, dummy32);
28e05dd8 380 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 381 status = nfs_ok;
28e05dd8 382 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 383 ;
28e05dd8 384 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 385 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 386 buf, dummy32, &ace->who_gid);
1da177e4 387 else
3c726023 388 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 389 buf, dummy32, &ace->who_uid);
3c726023
BF		 390 if (status)
391 return status;
1da177e4
LT		 392 }
393 } else
394 *acl = NULL;
395 if (bmval[1] & FATTR4_WORD1_MODE) {
396 READ_BUF(4);
397 len += 4;
06553991 398 iattr->ia_mode = be32_to_cpup(p++);
1da177e4
LT		 399 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
400 iattr->ia_valid |= ATTR_MODE;
401 }
402 if (bmval[1] & FATTR4_WORD1_OWNER) {
403 READ_BUF(4);
404 len += 4;
06553991 405 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 406 READ_BUF(dummy32);
407 len += (XDR_QUADLEN(dummy32) << 2);
408 READMEM(buf, dummy32);
47c85291
N		 409 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
410 return status;
1da177e4
LT		 411 iattr->ia_valid |= ATTR_UID;
412 }
413 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
414 READ_BUF(4);
415 len += 4;
06553991 416 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 417 READ_BUF(dummy32);
418 len += (XDR_QUADLEN(dummy32) << 2);
419 READMEM(buf, dummy32);
47c85291
N		 420 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
421 return status;
1da177e4
LT		 422 iattr->ia_valid |= ATTR_GID;
423 }
424 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
425 READ_BUF(4);
426 len += 4;
06553991 427 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 428 switch (dummy32) {
429 case NFS4_SET_TO_CLIENT_TIME:
1da177e4 430 len += 12;
bdba5368 431 status = nfsd4_decode_time(argp, &iattr->ia_atime);
4c94e13e
CH		 432 if (status)
433 return status;
1da177e4
LT		 434 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
435 break;
436 case NFS4_SET_TO_SERVER_TIME:
437 iattr->ia_valid |= ATTR_ATIME;
438 break;
439 default:
440 goto xdr_error;
441 }
442 }
1da177e4
LT		 443 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
444 READ_BUF(4);
445 len += 4;
06553991 446 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 447 switch (dummy32) {
448 case NFS4_SET_TO_CLIENT_TIME:
1da177e4 449 len += 12;
bdba5368 450 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
4c94e13e
CH		 451 if (status)
452 return status;
1da177e4
LT		 453 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
454 break;
455 case NFS4_SET_TO_SERVER_TIME:
456 iattr->ia_valid |= ATTR_MTIME;
457 break;
458 default:
459 goto xdr_error;
460 }
461 }
18032ca0
DQ		 462
463 label->len = 0;
2285ae76
AB		 464 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
465 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
18032ca0
DQ		 466 READ_BUF(4);
467 len += 4;
06553991 468 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
18032ca0
DQ		 469 READ_BUF(4);
470 len += 4;
06553991 471 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
18032ca0
DQ		 472 READ_BUF(4);
473 len += 4;
06553991 474 dummy32 = be32_to_cpup(p++);
18032ca0 475 READ_BUF(dummy32);
1ec8c0c4 476 if (dummy32 > NFS4_MAXLABELLEN)
18032ca0
DQ		 477 return nfserr_badlabel;
478 len += (XDR_QUADLEN(dummy32) << 2);
479 READMEM(buf, dummy32);
29c353b3
BF		 480 label->len = dummy32;
481 label->data = svcxdr_dupstr(argp, buf, dummy32);
18032ca0
DQ		 482 if (!label->data)
483 return nfserr_jukebox;
18032ca0 484 }
47057abd
AG		 485 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
486 if (!umask)
487 goto xdr_error;
488 READ_BUF(8);
489 len += 8;
490 dummy32 = be32_to_cpup(p++);
491 iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO);
492 dummy32 = be32_to_cpup(p++);
493 *umask = dummy32 & S_IRWXUGO;
494 iattr->ia_valid |= ATTR_MODE;
495 }
e864c189 496 if (len != expected_len)
1da177e4
LT		 497 goto xdr_error;
498
499 DECODE_TAIL;
1da177e4
LT		 500}
501
e31a1b66
BH		 502static __be32
503nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
504{
505 DECODE_HEAD;
506
507 READ_BUF(sizeof(stateid_t));
06553991 508 sid->si_generation = be32_to_cpup(p++);
e31a1b66
BH		 509 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
510
511 DECODE_TAIL;
512}
513
b37ad28b 514static __be32
1da177e4
LT		 515nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
516{
517 DECODE_HEAD;
518
519 READ_BUF(4);
06553991 520 access->ac_req_access = be32_to_cpup(p++);
1da177e4
LT		 521
522 DECODE_TAIL;
523}
524
acb2887e
BF		 525static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
526{
527 DECODE_HEAD;
e45d1a18 528 struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
12fc3e92 529 u32 dummy, uid, gid;
acb2887e
BF		 530 char *machine_name;
531 int i;
532 int nr_secflavs;
533
534 /* callback_sec_params4 */
535 READ_BUF(4);
06553991 536 nr_secflavs = be32_to_cpup(p++);
57569a70
BF		 537 if (nr_secflavs)
538 cbs->flavor = (u32)(-1);
539 else
540 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
541 cbs->flavor = 0;
acb2887e
BF		 542 for (i = 0; i < nr_secflavs; ++i) {
543 READ_BUF(4);
06553991 544 dummy = be32_to_cpup(p++);
acb2887e
BF		 545 switch (dummy) {
546 case RPC_AUTH_NULL:
547 /* Nothing to read */
12fc3e92
BF		 548 if (cbs->flavor == (u32)(-1))
549 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 550 break;
551 case RPC_AUTH_UNIX:
552 READ_BUF(8);
553 /* stamp */
06553991 554 dummy = be32_to_cpup(p++);
acb2887e
BF		 555
556 /* machine name */
06553991 557 dummy = be32_to_cpup(p++);
acb2887e
BF		 558 READ_BUF(dummy);
559 SAVEMEM(machine_name, dummy);
560
561 /* uid, gid */
562 READ_BUF(8);
06553991
BF		 563 uid = be32_to_cpup(p++);
564 gid = be32_to_cpup(p++);
acb2887e
BF		 565
566 /* more gids */
567 READ_BUF(4);
06553991 568 dummy = be32_to_cpup(p++);
acb2887e 569 READ_BUF(dummy * 4);
12fc3e92 570 if (cbs->flavor == (u32)(-1)) {
e45d1a18
TM		 571 kuid_t kuid = make_kuid(userns, uid);
572 kgid_t kgid = make_kgid(userns, gid);
03bc6d1c
EB		 573 if (uid_valid(kuid) && gid_valid(kgid)) {
574 cbs->uid = kuid;
575 cbs->gid = kgid;
576 cbs->flavor = RPC_AUTH_UNIX;
577 } else {
578 dprintk("RPC_AUTH_UNIX with invalid"
579 "uid or gid ignoring!\n");
580 }
12fc3e92 581 }
acb2887e
BF		 582 break;
583 case RPC_AUTH_GSS:
584 dprintk("RPC_AUTH_GSS callback secflavor "
585 "not supported!\n");
586 READ_BUF(8);
587 /* gcbp_service */
06553991 588 dummy = be32_to_cpup(p++);
acb2887e 589 /* gcbp_handle_from_server */
06553991 590 dummy = be32_to_cpup(p++);
acb2887e
BF		 591 READ_BUF(dummy);
592 p += XDR_QUADLEN(dummy);
593 /* gcbp_handle_from_client */
594 READ_BUF(4);
06553991 595 dummy = be32_to_cpup(p++);
acb2887e
BF		 596 READ_BUF(dummy);
597 break;
598 default:
599 dprintk("Illegal callback secflavor\n");
600 return nfserr_inval;
601 }
602 }
603 DECODE_TAIL;
604}
605
cb73a9f4
BF		 606static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
607{
608 DECODE_HEAD;
609
610 READ_BUF(4);
06553991 611 bc->bc_cb_program = be32_to_cpup(p++);
cb73a9f4
BF		 612 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
613
614 DECODE_TAIL;
615}
616
1d1bc8f2
BF		 617static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
618{
619 DECODE_HEAD;
1d1bc8f2
BF		 620
621 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
622 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991 623 bcts->dir = be32_to_cpup(p++);
6ce2357f
BS		 624 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
625 * could help us figure out we should be using it. */
1d1bc8f2
BF		 626 DECODE_TAIL;
627}
628
b37ad28b 629static __be32
1da177e4
LT		 630nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
631{
632 DECODE_HEAD;
633
e31a1b66 634 READ_BUF(4);
06553991 635 close->cl_seqid = be32_to_cpup(p++);
e31a1b66 636 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 637
638 DECODE_TAIL;
639}
640
641
b37ad28b 642static __be32
1da177e4
LT		 643nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
644{
645 DECODE_HEAD;
646
647 READ_BUF(12);
542d1ab3 648 p = xdr_decode_hyper(p, &commit->co_offset);
06553991 649 commit->co_count = be32_to_cpup(p++);
1da177e4
LT		 650
651 DECODE_TAIL;
652}
653
b37ad28b 654static __be32
1da177e4
LT		 655nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
656{
657 DECODE_HEAD;
658
659 READ_BUF(4);
06553991 660 create->cr_type = be32_to_cpup(p++);
1da177e4
LT		 661 switch (create->cr_type) {
662 case NF4LNK:
663 READ_BUF(4);
7fb84306
BF		 664 create->cr_datalen = be32_to_cpup(p++);
665 READ_BUF(create->cr_datalen);
29c353b3 666 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
7fb84306 667 if (!create->cr_data)
76f47128 668 return nfserr_jukebox;
1da177e4
LT		 669 break;
670 case NF4BLK:
671 case NF4CHR:
672 READ_BUF(8);
06553991
BF		 673 create->cr_specdata1 = be32_to_cpup(p++);
674 create->cr_specdata2 = be32_to_cpup(p++);
1da177e4
LT		 675 break;
676 case NF4SOCK:
677 case NF4FIFO:
678 case NF4DIR:
679 default:
680 break;
681 }
682
683 READ_BUF(4);
06553991 684 create->cr_namelen = be32_to_cpup(p++);
1da177e4
LT		 685 READ_BUF(create->cr_namelen);
686 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 687 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 688 return status;
689
3c8e0316 690 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
47057abd 691 &create->cr_acl, &create->cr_label,
880a3a53 692 &create->cr_umask);
c0d6fc8a 693 if (status)
1da177e4
LT		 694 goto out;
695
696 DECODE_TAIL;
697}
698
b37ad28b 699static inline __be32
1da177e4
LT		 700nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
701{
e31a1b66 702 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 703}
704
b37ad28b 705static inline __be32
1da177e4
LT		 706nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
707{
708 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
709}
710
b37ad28b 711static __be32
1da177e4
LT		 712nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
713{
714 DECODE_HEAD;
715
716 READ_BUF(4);
06553991 717 link->li_namelen = be32_to_cpup(p++);
1da177e4
LT		 718 READ_BUF(link->li_namelen);
719 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 720 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 721 return status;
722
723 DECODE_TAIL;
724}
725
b37ad28b 726static __be32
1da177e4
LT		 727nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
728{
729 DECODE_HEAD;
730
1da177e4
LT		 731 /*
732 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
733 */
734 READ_BUF(28);
06553991 735 lock->lk_type = be32_to_cpup(p++);
1da177e4
LT		 736 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
737 goto xdr_error;
06553991 738 lock->lk_reclaim = be32_to_cpup(p++);
542d1ab3
BF		 739 p = xdr_decode_hyper(p, &lock->lk_offset);
740 p = xdr_decode_hyper(p, &lock->lk_length);
06553991 741 lock->lk_is_new = be32_to_cpup(p++);
1da177e4
LT		 742
743 if (lock->lk_is_new) {
e31a1b66 744 READ_BUF(4);
06553991 745 lock->lk_new_open_seqid = be32_to_cpup(p++);
e31a1b66
BH		 746 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
747 if (status)
748 return status;
749 READ_BUF(8 + sizeof(clientid_t));
06553991 750 lock->lk_new_lock_seqid = be32_to_cpup(p++);
1da177e4 751 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
06553991 752 lock->lk_new_owner.len = be32_to_cpup(p++);
1da177e4
LT		 753 READ_BUF(lock->lk_new_owner.len);
754 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
755 } else {
e31a1b66
BH		 756 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
757 if (status)
758 return status;
759 READ_BUF(4);
06553991 760 lock->lk_old_lock_seqid = be32_to_cpup(p++);
1da177e4
LT		 761 }
762
763 DECODE_TAIL;
764}
765
b37ad28b 766static __be32
1da177e4
LT		 767nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
768{
769 DECODE_HEAD;
770
771 READ_BUF(32);
06553991 772 lockt->lt_type = be32_to_cpup(p++);
1da177e4
LT		 773 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
774 goto xdr_error;
542d1ab3
BF		 775 p = xdr_decode_hyper(p, &lockt->lt_offset);
776 p = xdr_decode_hyper(p, &lockt->lt_length);
1da177e4 777 COPYMEM(&lockt->lt_clientid, 8);
06553991 778 lockt->lt_owner.len = be32_to_cpup(p++);
1da177e4
LT		 779 READ_BUF(lockt->lt_owner.len);
780 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
781
782 DECODE_TAIL;
783}
784
b37ad28b 785static __be32
1da177e4
LT		 786nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
787{
788 DECODE_HEAD;
789
e31a1b66 790 READ_BUF(8);
06553991 791 locku->lu_type = be32_to_cpup(p++);
1da177e4
LT		 792 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
793 goto xdr_error;
06553991 794 locku->lu_seqid = be32_to_cpup(p++);
e31a1b66
BH		 795 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
796 if (status)
797 return status;
798 READ_BUF(16);
542d1ab3
BF		 799 p = xdr_decode_hyper(p, &locku->lu_offset);
800 p = xdr_decode_hyper(p, &locku->lu_length);
1da177e4
LT		 801
802 DECODE_TAIL;
803}
804
b37ad28b 805static __be32
1da177e4
LT		 806nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
807{
808 DECODE_HEAD;
809
810 READ_BUF(4);
06553991 811 lookup->lo_len = be32_to_cpup(p++);
1da177e4
LT		 812 READ_BUF(lookup->lo_len);
813 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 814 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 815 return status;
816
817 DECODE_TAIL;
818}
819
2c8bd7e0 820static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 821{
822 __be32 *p;
823 u32 w;
824
825 READ_BUF(4);
06553991 826 w = be32_to_cpup(p++);
2c8bd7e0
BH		 827 *share_access = w & NFS4_SHARE_ACCESS_MASK;
828 *deleg_want = w & NFS4_SHARE_WANT_MASK;
829 if (deleg_when)
830 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
831
04f9e664
BF		 832 switch (w & NFS4_SHARE_ACCESS_MASK) {
833 case NFS4_SHARE_ACCESS_READ:
834 case NFS4_SHARE_ACCESS_WRITE:
835 case NFS4_SHARE_ACCESS_BOTH:
836 break;
837 default:
838 return nfserr_bad_xdr;
839 }
fc0d14fe 840 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 841 if (!w)
842 return nfs_ok;
843 if (!argp->minorversion)
844 return nfserr_bad_xdr;
845 switch (w & NFS4_SHARE_WANT_MASK) {
846 case NFS4_SHARE_WANT_NO_PREFERENCE:
847 case NFS4_SHARE_WANT_READ_DELEG:
848 case NFS4_SHARE_WANT_WRITE_DELEG:
849 case NFS4_SHARE_WANT_ANY_DELEG:
850 case NFS4_SHARE_WANT_NO_DELEG:
851 case NFS4_SHARE_WANT_CANCEL:
852 break;
853 default:
854 return nfserr_bad_xdr;
855 }
92bac8c5 856 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 857 if (!w)
858 return nfs_ok;
2c8bd7e0
BH		 859
860 if (!deleg_when) /* open_downgrade */
861 return nfserr_inval;
04f9e664
BF		 862 switch (w) {
863 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
864 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 865 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
866 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 867 return nfs_ok;
868 }
869xdr_error:
870 return nfserr_bad_xdr;
871}
872
873static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
874{
875 __be32 *p;
876
877 READ_BUF(4);
06553991 878 *x = be32_to_cpup(p++);
04f9e664 879 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 880 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 881 return nfserr_bad_xdr;
882 return nfs_ok;
883xdr_error:
884 return nfserr_bad_xdr;
885}
886
a084daf5
BF		 887static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
888{
889 __be32 *p;
890
891 READ_BUF(4);
06553991 892 o->len = be32_to_cpup(p++);
a084daf5
BF		 893
894 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
895 return nfserr_bad_xdr;
896
897 READ_BUF(o->len);
898 SAVEMEM(o->data, o->len);
899 return nfs_ok;
900xdr_error:
901 return nfserr_bad_xdr;
902}
903
b37ad28b 904static __be32
1da177e4
LT		 905nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
906{
907 DECODE_HEAD;
2c8bd7e0 908 u32 dummy;
1da177e4
LT		 909
910 memset(open->op_bmval, 0, sizeof(open->op_bmval));
911 open->op_iattr.ia_valid = 0;
fe0750e5 912 open->op_openowner = NULL;
1da177e4 913
9d313b17 914 open->op_xdr_error = 0;
1da177e4 915 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 916 READ_BUF(4);
06553991 917 open->op_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 918 /* decode, yet ignore deleg_when until supported */
919 status = nfsd4_decode_share_access(argp, &open->op_share_access,
920 &open->op_deleg_want, &dummy);
04f9e664
BF		 921 if (status)
922 goto xdr_error;
923 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
924 if (status)
925 goto xdr_error;
a084daf5 926 READ_BUF(sizeof(clientid_t));
1da177e4 927 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 928 status = nfsd4_decode_opaque(argp, &open->op_owner);
929 if (status)
930 goto xdr_error;
931 READ_BUF(4);
06553991 932 open->op_create = be32_to_cpup(p++);
1da177e4
LT		 933 switch (open->op_create) {
934 case NFS4_OPEN_NOCREATE:
935 break;
936 case NFS4_OPEN_CREATE:
937 READ_BUF(4);
06553991 938 open->op_createmode = be32_to_cpup(p++);
1da177e4
LT		 939 switch (open->op_createmode) {
940 case NFS4_CREATE_UNCHECKED:
941 case NFS4_CREATE_GUARDED:
c0d6fc8a 942 status = nfsd4_decode_fattr(argp, open->op_bmval,
47057abd 943 &open->op_iattr, &open->op_acl, &open->op_label,
880a3a53 944 &open->op_umask);
c0d6fc8a 945 if (status)
1da177e4
LT		 946 goto out;
947 break;
948 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 949 READ_BUF(NFS4_VERIFIER_SIZE);
950 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 951 break;
79fb54ab
BH		 952 case NFS4_CREATE_EXCLUSIVE4_1:
953 if (argp->minorversion < 1)
954 goto xdr_error;
ab4684d1
CL		 955 READ_BUF(NFS4_VERIFIER_SIZE);
956 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 957 status = nfsd4_decode_fattr(argp, open->op_bmval,
47057abd 958 &open->op_iattr, &open->op_acl, &open->op_label,
880a3a53 959 &open->op_umask);
79fb54ab
BH		 960 if (status)
961 goto out;
962 break;
1da177e4
LT		 963 default:
964 goto xdr_error;
965 }
966 break;
967 default:
968 goto xdr_error;
969 }
970
971 /* open_claim */
972 READ_BUF(4);
06553991 973 open->op_claim_type = be32_to_cpup(p++);
1da177e4
LT		 974 switch (open->op_claim_type) {
975 case NFS4_OPEN_CLAIM_NULL:
976 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
977 READ_BUF(4);
06553991 978 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 979 READ_BUF(open->op_fname.len);
980 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 981 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 982 return status;
983 break;
984 case NFS4_OPEN_CLAIM_PREVIOUS:
985 READ_BUF(4);
06553991 986 open->op_delegate_type = be32_to_cpup(p++);
1da177e4
LT		 987 break;
988 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 989 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
990 if (status)
991 return status;
992 READ_BUF(4);
06553991 993 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 994 READ_BUF(open->op_fname.len);
995 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 996 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 997 return status;
998 break;
8b289b2c
BF		 999 case NFS4_OPEN_CLAIM_FH:
1000 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1001 if (argp->minorversion < 1)
1002 goto xdr_error;
1003 /* void */
1004 break;
1005 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1006 if (argp->minorversion < 1)
1007 goto xdr_error;
1008 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
1009 if (status)
1010 return status;
1011 break;
1da177e4
LT		 1012 default:
1013 goto xdr_error;
1014 }
1015
1016 DECODE_TAIL;
1017}
1018
b37ad28b 1019static __be32
1da177e4
LT		 1020nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1021{
1022 DECODE_HEAD;
e1a90ebd
AS		 1023
1024 if (argp->minorversion >= 1)
1025 return nfserr_notsupp;
1026
e31a1b66
BH		 1027 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
1028 if (status)
1029 return status;
1030 READ_BUF(4);
06553991 1031 open_conf->oc_seqid = be32_to_cpup(p++);
e1a90ebd 1032
1da177e4
LT		 1033 DECODE_TAIL;
1034}
1035
b37ad28b 1036static __be32
1da177e4
LT		 1037nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1038{
1039 DECODE_HEAD;
1040
e31a1b66
BH		 1041 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
1042 if (status)
1043 return status;
04f9e664 1044 READ_BUF(4);
06553991 1045 open_down->od_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 1046 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1047 &open_down->od_deleg_want, NULL);
04f9e664
BF		 1048 if (status)
1049 return status;
1050 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1051 if (status)
1052 return status;
1da177e4
LT		 1053 DECODE_TAIL;
1054}
1055
b37ad28b 1056static __be32
1da177e4
LT		 1057nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1058{
1059 DECODE_HEAD;
1060
1061 READ_BUF(4);
06553991 1062 putfh->pf_fhlen = be32_to_cpup(p++);
1da177e4
LT		 1063 if (putfh->pf_fhlen > NFS4_FHSIZE)
1064 goto xdr_error;
1065 READ_BUF(putfh->pf_fhlen);
1066 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1067
1068 DECODE_TAIL;
1069}
1070
e1a90ebd
AS		 1071static __be32
1072nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1073{
1074 if (argp->minorversion == 0)
1075 return nfs_ok;
1076 return nfserr_notsupp;
1077}
1078
b37ad28b 1079static __be32
1da177e4
LT		 1080nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1081{
1082 DECODE_HEAD;
1083
e31a1b66
BH		 1084 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1085 if (status)
1086 return status;
1087 READ_BUF(12);
542d1ab3 1088 p = xdr_decode_hyper(p, &read->rd_offset);
06553991 1089 read->rd_length = be32_to_cpup(p++);
1da177e4
LT		 1090
1091 DECODE_TAIL;
1092}
1093
b37ad28b 1094static __be32
1da177e4
LT		 1095nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1096{
1097 DECODE_HEAD;
1098
1099 READ_BUF(24);
542d1ab3 1100 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1da177e4 1101 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
06553991
BF		 1102 readdir->rd_dircount = be32_to_cpup(p++);
1103 readdir->rd_maxcount = be32_to_cpup(p++);
1da177e4
LT		 1104 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1105 goto out;
1106
1107 DECODE_TAIL;
1108}
1109
b37ad28b 1110static __be32
1da177e4
LT		 1111nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1112{
1113 DECODE_HEAD;
1114
1115 READ_BUF(4);
06553991 1116 remove->rm_namelen = be32_to_cpup(p++);
1da177e4
LT		 1117 READ_BUF(remove->rm_namelen);
1118 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1119 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1120 return status;
1121
1122 DECODE_TAIL;
1123}
1124
b37ad28b 1125static __be32
1da177e4
LT		 1126nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1127{
1128 DECODE_HEAD;
1129
1130 READ_BUF(4);
06553991 1131 rename->rn_snamelen = be32_to_cpup(p++);
4aed9c46 1132 READ_BUF(rename->rn_snamelen);
1da177e4 1133 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
4aed9c46 1134 READ_BUF(4);
06553991 1135 rename->rn_tnamelen = be32_to_cpup(p++);
1da177e4
LT		 1136 READ_BUF(rename->rn_tnamelen);
1137 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1138 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1139 return status;
a36b1725 1140 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1141 return status;
1142
1143 DECODE_TAIL;
1144}
1145
b37ad28b 1146static __be32
1da177e4
LT		 1147nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1148{
1149 DECODE_HEAD;
1150
e1a90ebd
AS		 1151 if (argp->minorversion >= 1)
1152 return nfserr_notsupp;
1153
1da177e4
LT		 1154 READ_BUF(sizeof(clientid_t));
1155 COPYMEM(clientid, sizeof(clientid_t));
1156
1157 DECODE_TAIL;
1158}
1159
dcb488a3
AA		 1160static __be32
1161nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1162 struct nfsd4_secinfo *secinfo)
1163{
1164 DECODE_HEAD;
1165
1166 READ_BUF(4);
06553991 1167 secinfo->si_namelen = be32_to_cpup(p++);
dcb488a3
AA		 1168 READ_BUF(secinfo->si_namelen);
1169 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1170 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1171 if (status)
1172 return status;
1173 DECODE_TAIL;
1174}
1175
04f4ad16
BF		 1176static __be32
1177nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1178 struct nfsd4_secinfo_no_name *sin)
1179{
1180 DECODE_HEAD;
1181
1182 READ_BUF(4);
06553991 1183 sin->sin_style = be32_to_cpup(p++);
04f4ad16
BF		 1184 DECODE_TAIL;
1185}
1186
b37ad28b 1187static __be32
1da177e4
LT		 1188nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1189{
e31a1b66 1190 __be32 status;
1da177e4 1191
e31a1b66
BH		 1192 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1193 if (status)
1194 return status;
3c8e0316 1195 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
47057abd 1196 &setattr->sa_acl, &setattr->sa_label, NULL);
1da177e4
LT		 1197}
1198
b37ad28b 1199static __be32
1da177e4
LT		 1200nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1201{
1202 DECODE_HEAD;
1203
e1a90ebd
AS		 1204 if (argp->minorversion >= 1)
1205 return nfserr_notsupp;
1206
ab4684d1
CL		 1207 READ_BUF(NFS4_VERIFIER_SIZE);
1208 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1209
a084daf5
BF		 1210 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1211 if (status)
1212 return nfserr_bad_xdr;
1213 READ_BUF(8);
06553991
BF		 1214 setclientid->se_callback_prog = be32_to_cpup(p++);
1215 setclientid->se_callback_netid_len = be32_to_cpup(p++);
4aed9c46 1216 READ_BUF(setclientid->se_callback_netid_len);
1da177e4 1217 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
4aed9c46 1218 READ_BUF(4);
06553991 1219 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1da177e4 1220
4aed9c46 1221 READ_BUF(setclientid->se_callback_addr_len);
1da177e4 1222 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
4aed9c46 1223 READ_BUF(4);
06553991 1224 setclientid->se_callback_ident = be32_to_cpup(p++);
1da177e4
LT		 1225
1226 DECODE_TAIL;
1227}
1228
b37ad28b 1229static __be32
1da177e4
LT		 1230nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1231{
1232 DECODE_HEAD;
1233
e1a90ebd
AS		 1234 if (argp->minorversion >= 1)
1235 return nfserr_notsupp;
1236
ab4684d1 1237 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1238 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1239 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1240
1241 DECODE_TAIL;
1242}
1243
1244/* Also used for NVERIFY */
b37ad28b 1245static __be32
1da177e4
LT		 1246nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1247{
1da177e4
LT		 1248 DECODE_HEAD;
1249
1250 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1251 goto out;
1252
1253 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1254 * nfsd4_proc_verify */
1255
1da177e4 1256 READ_BUF(4);
06553991 1257 verify->ve_attrlen = be32_to_cpup(p++);
1da177e4
LT		 1258 READ_BUF(verify->ve_attrlen);
1259 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1260
1261 DECODE_TAIL;
1262}
1263
b37ad28b 1264static __be32
1da177e4
LT		 1265nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1266{
1267 int avail;
1da177e4
LT		 1268 int len;
1269 DECODE_HEAD;
1270
e31a1b66
BH		 1271 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1272 if (status)
1273 return status;
1274 READ_BUF(16);
542d1ab3 1275 p = xdr_decode_hyper(p, &write->wr_offset);
06553991 1276 write->wr_stable_how = be32_to_cpup(p++);
54bbb7d2 1277 if (write->wr_stable_how > NFS_FILE_SYNC)
1da177e4 1278 goto xdr_error;
06553991 1279 write->wr_buflen = be32_to_cpup(p++);
1da177e4
LT		 1280
1281 /* Sorry .. no magic macros for this.. *
1282 * READ_BUF(write->wr_buflen);
1283 * SAVEMEM(write->wr_buf, write->wr_buflen);
1284 */
1285 avail = (char*)argp->end - (char*)argp->p;
1286 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1287 dprintk("NFSD: xdr error (%s:%d)\n",
1288 __FILE__, __LINE__);
1da177e4
LT		 1289 goto xdr_error;
1290 }
70cc7f75
BF		 1291 write->wr_head.iov_base = p;
1292 write->wr_head.iov_len = avail;
70cc7f75 1293 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1294
1295 len = XDR_QUADLEN(write->wr_buflen) << 2;
1296 if (len >= avail) {
1297 int pages;
1298
1299 len -= avail;
1300
1301 pages = len >> PAGE_SHIFT;
1302 argp->pagelist += pages;
1303 argp->pagelen -= pages * PAGE_SIZE;
1304 len -= pages * PAGE_SIZE;
1305
fc788f64 1306 next_decode_page(argp);
1da177e4 1307 }
5a80a54d 1308 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1309
1310 DECODE_TAIL;
1311}
1312
b37ad28b 1313static __be32
1da177e4
LT		 1314nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1315{
1316 DECODE_HEAD;
1317
e1a90ebd
AS		 1318 if (argp->minorversion >= 1)
1319 return nfserr_notsupp;
1320
1da177e4
LT		 1321 READ_BUF(12);
1322 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
06553991 1323 rlockowner->rl_owner.len = be32_to_cpup(p++);
1da177e4
LT		 1324 READ_BUF(rlockowner->rl_owner.len);
1325 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1326
60adfc50
AA		 1327 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1328 return nfserr_inval;
1da177e4
LT		 1329 DECODE_TAIL;
1330}
1331
2db134eb
AA		 1332static __be32
1333nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1334 struct nfsd4_exchange_id *exid)
2db134eb 1335{
5afa040b 1336 int dummy, tmp;
0733d213
AA		 1337 DECODE_HEAD;
1338
1339 READ_BUF(NFS4_VERIFIER_SIZE);
1340 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1341
a084daf5
BF		 1342 status = nfsd4_decode_opaque(argp, &exid->clname);
1343 if (status)
1344 return nfserr_bad_xdr;
0733d213
AA		 1345
1346 READ_BUF(4);
06553991 1347 exid->flags = be32_to_cpup(p++);
0733d213
AA		 1348
1349 /* Ignore state_protect4_a */
1350 READ_BUF(4);
06553991 1351 exid->spa_how = be32_to_cpup(p++);
0733d213
AA		 1352 switch (exid->spa_how) {
1353 case SP4_NONE:
1354 break;
1355 case SP4_MACH_CRED:
1356 /* spo_must_enforce */
ed941643
AE		 1357 status = nfsd4_decode_bitmap(argp,
1358 exid->spo_must_enforce);
1359 if (status)
1360 goto out;
0733d213 1361 /* spo_must_allow */
ed941643
AE		 1362 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
1363 if (status)
1364 goto out;
0733d213
AA		 1365 break;
1366 case SP4_SSV:
1367 /* ssp_ops */
1368 READ_BUF(4);
06553991 1369 dummy = be32_to_cpup(p++);
0733d213
AA		 1370 READ_BUF(dummy * 4);
1371 p += dummy;
1372
1373 READ_BUF(4);
06553991 1374 dummy = be32_to_cpup(p++);
0733d213
AA		 1375 READ_BUF(dummy * 4);
1376 p += dummy;
1377
1378 /* ssp_hash_algs<> */
1379 READ_BUF(4);
06553991 1380 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1381 while (tmp--) {
1382 READ_BUF(4);
06553991 1383 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1384 READ_BUF(dummy);
1385 p += XDR_QUADLEN(dummy);
1386 }
0733d213
AA		 1387
1388 /* ssp_encr_algs<> */
1389 READ_BUF(4);
06553991 1390 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1391 while (tmp--) {
1392 READ_BUF(4);
06553991 1393 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1394 READ_BUF(dummy);
1395 p += XDR_QUADLEN(dummy);
1396 }
0733d213 1397
5ed96bc5 1398 /* ignore ssp_window and ssp_num_gss_handles: */
0733d213 1399 READ_BUF(8);
0733d213
AA		 1400 break;
1401 default:
1402 goto xdr_error;
1403 }
1404
0733d213 1405 READ_BUF(4); /* nfs_impl_id4 array length */
06553991 1406 dummy = be32_to_cpup(p++);
0733d213
AA		 1407
1408 if (dummy > 1)
1409 goto xdr_error;
1410
1411 if (dummy == 1) {
79123444
BF		 1412 status = nfsd4_decode_opaque(argp, &exid->nii_domain);
1413 if (status)
1414 goto xdr_error;
0733d213
AA		 1415
1416 /* nii_name */
79123444
BF		 1417 status = nfsd4_decode_opaque(argp, &exid->nii_name);
1418 if (status)
1419 goto xdr_error;
0733d213
AA		 1420
1421 /* nii_date */
79123444
BF		 1422 status = nfsd4_decode_time(argp, &exid->nii_time);
1423 if (status)
1424 goto xdr_error;
0733d213
AA		 1425 }
1426 DECODE_TAIL;
2db134eb
AA		 1427}
1428
1429static __be32
1430nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1431 struct nfsd4_create_session *sess)
1432{
ec6b5d7b 1433 DECODE_HEAD;
ec6b5d7b
AA		 1434
1435 READ_BUF(16);
1436 COPYMEM(&sess->clientid, 8);
06553991
BF		 1437 sess->seqid = be32_to_cpup(p++);
1438 sess->flags = be32_to_cpup(p++);
ec6b5d7b
AA		 1439
1440 /* Fore channel attrs */
1441 READ_BUF(28);
b96811cd 1442 p++; /* headerpadsz is always 0 */
06553991
BF		 1443 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1444 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1445 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1446 sess->fore_channel.maxops = be32_to_cpup(p++);
1447 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1448 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1449 if (sess->fore_channel.nr_rdma_attrs == 1) {
1450 READ_BUF(4);
06553991 1451 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1452 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1453 dprintk("Too many fore channel attr bitmaps!\n");
1454 goto xdr_error;
1455 }
1456
1457 /* Back channel attrs */
1458 READ_BUF(28);
b96811cd 1459 p++; /* headerpadsz is always 0 */
06553991
BF		 1460 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1461 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1462 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1463 sess->back_channel.maxops = be32_to_cpup(p++);
1464 sess->back_channel.maxreqs = be32_to_cpup(p++);
1465 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1466 if (sess->back_channel.nr_rdma_attrs == 1) {
1467 READ_BUF(4);
06553991 1468 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1469 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1470 dprintk("Too many back channel attr bitmaps!\n");
1471 goto xdr_error;
1472 }
1473
acb2887e 1474 READ_BUF(4);
06553991 1475 sess->callback_prog = be32_to_cpup(p++);
acb2887e 1476 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1477 DECODE_TAIL;
2db134eb
AA		 1478}
1479
1480static __be32
1481nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1482 struct nfsd4_destroy_session *destroy_session)
1483{
e10e0cfc
BH		 1484 DECODE_HEAD;
1485 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1486 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1487
1488 DECODE_TAIL;
2db134eb
AA		 1489}
1490
e1ca12df
BS		 1491static __be32
1492nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1493 struct nfsd4_free_stateid *free_stateid)
1494{
1495 DECODE_HEAD;
1496
1497 READ_BUF(sizeof(stateid_t));
06553991 1498 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
e1ca12df
BS		 1499 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1500
1501 DECODE_TAIL;
1502}
1503
2db134eb
AA		 1504static __be32
1505nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1506 struct nfsd4_sequence *seq)
1507{
b85d4c01
BH		 1508 DECODE_HEAD;
1509
1510 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1511 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991
BF		 1512 seq->seqid = be32_to_cpup(p++);
1513 seq->slotid = be32_to_cpup(p++);
1514 seq->maxslots = be32_to_cpup(p++);
1515 seq->cachethis = be32_to_cpup(p++);
b85d4c01
BH		 1516
1517 DECODE_TAIL;
2db134eb
AA		 1518}
1519
17456804
BS		 1520static __be32
1521nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1522{
17456804 1523 int i;
03cfb420
BS		 1524 __be32 *p, status;
1525 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1526
1527 READ_BUF(4);
1528 test_stateid->ts_num_ids = ntohl(*p++);
1529
03cfb420 1530 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1531
1532 for (i = 0; i < test_stateid->ts_num_ids; i++) {
d5e23383 1533 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
03cfb420 1534 if (!stateid) {
afcf6792 1535 status = nfserrno(-ENOMEM);
03cfb420
BS		 1536 goto out;
1537 }
1538
03cfb420
BS		 1539 INIT_LIST_HEAD(&stateid->ts_id_list);
1540 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1541
1542 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1543 if (status)
03cfb420 1544 goto out;
17456804
BS		 1545 }
1546
1547 status = 0;
1548out:
1549 return status;
1550xdr_error:
1551 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1552 status = nfserr_bad_xdr;
1553 goto out;
1554}
1555
345c2842
MJ		 1556static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1557{
1558 DECODE_HEAD;
1559
1560 READ_BUF(8);
1561 COPYMEM(&dc->clientid, 8);
1562
1563 DECODE_TAIL;
1564}
1565
4dc6ec00
BF		 1566static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1567{
1568 DECODE_HEAD;
1569
1570 READ_BUF(4);
06553991 1571 rc->rca_one_fs = be32_to_cpup(p++);
4dc6ec00
BF		 1572
1573 DECODE_TAIL;
1574}
1575
9cf514cc
CH		 1576#ifdef CONFIG_NFSD_PNFS
1577static __be32
1578nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1579 struct nfsd4_getdeviceinfo *gdev)
1580{
1581 DECODE_HEAD;
1582 u32 num, i;
1583
1584 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1585 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1586 gdev->gd_layout_type = be32_to_cpup(p++);
1587 gdev->gd_maxcount = be32_to_cpup(p++);
1588 num = be32_to_cpup(p++);
1589 if (num) {
3171822f
SM		 1590 if (num > 1000)
1591 goto xdr_error;
9cf514cc
CH		 1592 READ_BUF(4 * num);
1593 gdev->gd_notify_types = be32_to_cpup(p++);
1594 for (i = 1; i < num; i++) {
1595 if (be32_to_cpup(p++)) {
1596 status = nfserr_inval;
1597 goto out;
1598 }
1599 }
1600 }
1601 DECODE_TAIL;
1602}
1603
1604static __be32
1605nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1606 struct nfsd4_layoutget *lgp)
1607{
1608 DECODE_HEAD;
1609
1610 READ_BUF(36);
1611 lgp->lg_signal = be32_to_cpup(p++);
1612 lgp->lg_layout_type = be32_to_cpup(p++);
1613 lgp->lg_seg.iomode = be32_to_cpup(p++);
1614 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1615 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1616 p = xdr_decode_hyper(p, &lgp->lg_minlength);
db59c0ef
KM		 1617
1618 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1619 if (status)
1620 return status;
1621
9cf514cc
CH		 1622 READ_BUF(4);
1623 lgp->lg_maxcount = be32_to_cpup(p++);
1624
1625 DECODE_TAIL;
1626}
1627
1628static __be32
1629nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1630 struct nfsd4_layoutcommit *lcp)
1631{
1632 DECODE_HEAD;
1633 u32 timechange;
1634
1635 READ_BUF(20);
1636 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1637 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1638 lcp->lc_reclaim = be32_to_cpup(p++);
db59c0ef
KM		 1639
1640 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1641 if (status)
1642 return status;
1643
9cf514cc
CH		 1644 READ_BUF(4);
1645 lcp->lc_newoffset = be32_to_cpup(p++);
1646 if (lcp->lc_newoffset) {
1647 READ_BUF(8);
1648 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1649 } else
1650 lcp->lc_last_wr = 0;
1651 READ_BUF(4);
1652 timechange = be32_to_cpup(p++);
1653 if (timechange) {
1654 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1655 if (status)
1656 return status;
1657 } else {
1658 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1659 }
1660 READ_BUF(8);
1661 lcp->lc_layout_type = be32_to_cpup(p++);
1662
1663 /*
1664 * Save the layout update in XDR format and let the layout driver deal
1665 * with it later.
1666 */
1667 lcp->lc_up_len = be32_to_cpup(p++);
1668 if (lcp->lc_up_len > 0) {
1669 READ_BUF(lcp->lc_up_len);
1670 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1671 }
1672
1673 DECODE_TAIL;
1674}
1675
1676static __be32
1677nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1678 struct nfsd4_layoutreturn *lrp)
1679{
1680 DECODE_HEAD;
1681
1682 READ_BUF(16);
1683 lrp->lr_reclaim = be32_to_cpup(p++);
1684 lrp->lr_layout_type = be32_to_cpup(p++);
1685 lrp->lr_seg.iomode = be32_to_cpup(p++);
1686 lrp->lr_return_type = be32_to_cpup(p++);
1687 if (lrp->lr_return_type == RETURN_FILE) {
1688 READ_BUF(16);
1689 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1690 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
db59c0ef
KM		 1691
1692 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1693 if (status)
1694 return status;
1695
9cf514cc
CH		 1696 READ_BUF(4);
1697 lrp->lrf_body_len = be32_to_cpup(p++);
1698 if (lrp->lrf_body_len > 0) {
1699 READ_BUF(lrp->lrf_body_len);
1700 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1701 }
1702 } else {
1703 lrp->lr_seg.offset = 0;
1704 lrp->lr_seg.length = NFS4_MAX_UINT64;
1705 }
1706
1707 DECODE_TAIL;
1708}
1709#endif /* CONFIG_NFSD_PNFS */
1710
95d871f0
AS		 1711static __be32
1712nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1713 struct nfsd4_fallocate *fallocate)
1714{
1715 DECODE_HEAD;
1716
1717 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1718 if (status)
1719 return status;
1720
1721 READ_BUF(16);
1722 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1723 xdr_decode_hyper(p, &fallocate->falloc_length);
1724
1725 DECODE_TAIL;
1726}
1727
ffa0160a
CH		 1728static __be32
1729nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1730{
1731 DECODE_HEAD;
1732
1733 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1734 if (status)
1735 return status;
1736 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1737 if (status)
1738 return status;
1739
1740 READ_BUF(8 + 8 + 8);
1741 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1742 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1743 p = xdr_decode_hyper(p, &clone->cl_count);
1744 DECODE_TAIL;
1745}
1746
29ae7f9d
AS		 1747static __be32
1748nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1749{
1750 DECODE_HEAD;
29ae7f9d
AS		 1751
1752 status = nfsd4_decode_stateid(argp, &copy->cp_src_stateid);
1753 if (status)
1754 return status;
1755 status = nfsd4_decode_stateid(argp, &copy->cp_dst_stateid);
1756 if (status)
1757 return status;
1758
1759 READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
1760 p = xdr_decode_hyper(p, &copy->cp_src_pos);
1761 p = xdr_decode_hyper(p, &copy->cp_dst_pos);
1762 p = xdr_decode_hyper(p, &copy->cp_count);
edcc8452 1763 p++; /* ca_consecutive: we always do consecutive copies */
29ae7f9d 1764 copy->cp_synchronous = be32_to_cpup(p++);
b96811cd 1765 /* tmp = be32_to_cpup(p); Source server list not supported */
29ae7f9d
AS		 1766
1767 DECODE_TAIL;
1768}
1769
6308bc98
OK		 1770static __be32
1771nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
1772 struct nfsd4_offload_status *os)
1773{
1774 return nfsd4_decode_stateid(argp, &os->stateid);
1775}
1776
24bab491
AS		 1777static __be32
1778nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1779{
1780 DECODE_HEAD;
1781
1782 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1783 if (status)
1784 return status;
1785
1786 READ_BUF(8 + 4);
1787 p = xdr_decode_hyper(p, &seek->seek_offset);
1788 seek->seek_whence = be32_to_cpup(p);
1789
1790 DECODE_TAIL;
1791}
1792
347e0ad9
BH		 1793static __be32
1794nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1795{
1796 return nfs_ok;
1797}
1798
3c375c6f
BH		 1799static __be32
1800nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1801{
1e685ec2 1802 return nfserr_notsupp;
3c375c6f
BH		 1803}
1804
347e0ad9
BH		 1805typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1806
c1df609d 1807static const nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1808 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1809 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1810 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1811 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1812 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1813 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1814 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1815 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1816 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1817 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1818 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1819 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1820 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1821 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1822 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1823 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1824 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1825 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1826 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1827 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1828 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1829 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1830 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1831 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1832 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1833 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1834 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1835 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1836 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1837 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1838 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1839 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1840 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1841 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1842 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1843 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1844 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1845
1846 /* new operations for NFSv4.1 */
cb73a9f4 1847 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1848 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1849 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1850 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1851 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1852 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae 1853 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc
CH		 1854#ifdef CONFIG_NFSD_PNFS
1855 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1856 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1857 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1858 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1859 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1860#else
9064caae
RD		 1861 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1862 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1863 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1864 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1865 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc 1866#endif
04f4ad16 1867 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1868 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1869 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1870 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1871 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1872 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1873 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
87a15a80
AS		 1874
1875 /* new operations for NFSv4.2 */
95d871f0 1876 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
29ae7f9d 1877 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
87a15a80 1878 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
b0cb9085 1879 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
87a15a80
AS		 1880 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1881 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1882 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
885e2bf3 1883 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status,
6308bc98 1884 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status,
87a15a80 1885 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
24bab491 1886 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
87a15a80 1887 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
ffa0160a 1888 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
2db134eb
AA		 1889};
1890
e1a90ebd
AS		 1891static inline bool
1892nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1893{
8217d146 1894 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1895 return false;
8217d146 1896 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1897 return false;
8217d146
AS		 1898 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1899 return false;
1900 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1901 return false;
1902 return true;
1903}
f2feb96b 1904
b37ad28b 1905static __be32
1da177e4
LT		 1906nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1907{
1908 DECODE_HEAD;
1909 struct nfsd4_op *op;
1091006c 1910 bool cachethis = false;
a5cddc88
BF		 1911 int auth_slack= argp->rqstp->rq_auth_slack;
1912 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 1913 int readcount = 0;
1914 int readbytes = 0;
1da177e4
LT		 1915 int i;
1916
1da177e4 1917 READ_BUF(4);
06553991 1918 argp->taglen = be32_to_cpup(p++);
4aed9c46 1919 READ_BUF(argp->taglen);
1da177e4 1920 SAVEMEM(argp->tag, argp->taglen);
4aed9c46 1921 READ_BUF(8);
06553991
BF		 1922 argp->minorversion = be32_to_cpup(p++);
1923 argp->opcnt = be32_to_cpup(p++);
4f0cefbf 1924 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 1925
1926 if (argp->taglen > NFSD4_MAX_TAGLEN)
1927 goto xdr_error;
0078117c
BF		 1928 /*
1929 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
1930 * here, so we return success at the xdr level so that
1931 * nfsd4_proc can handle this is an NFS-level error.
1932 */
1933 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
1934 return 0;
1da177e4 1935
e8c96f8c 1936 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
5d6031ca 1937 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1da177e4
LT		 1938 if (!argp->ops) {
1939 argp->ops = argp->iops;
817cb9d4 1940 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1941 goto xdr_error;
1942 }
1943 }
1944
e1a90ebd 1945 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1946 argp->opcnt = 0;
1947
1da177e4
LT		 1948 for (i = 0; i < argp->opcnt; i++) {
1949 op = &argp->ops[i];
1950 op->replay = NULL;
1951
8a61b18c 1952 READ_BUF(4);
06553991 1953 op->opnum = be32_to_cpup(p++);
1da177e4 1954
e1a90ebd
AS		 1955 if (nfsd4_opnum_in_range(argp, op))
1956 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1957 else {
1da177e4
LT		 1958 op->opnum = OP_ILLEGAL;
1959 op->status = nfserr_op_illegal;
1da177e4 1960 }
f4f9ef4a 1961 op->opdesc = OPDESC(op);
1091006c
BF		 1962 /*
1963 * We'll try to cache the result in the DRC if any one
1964 * op in the compound wants to be cached:
1965 */
1966 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 1967
b0e35fda
BF		 1968 if (op->opnum == OP_READ) {
1969 readcount++;
1970 readbytes += nfsd4_max_reply(argp->rqstp, op);
1971 } else
1972 max_reply += nfsd4_max_reply(argp->rqstp, op);
f7b43d0c 1973 /*
7323f0d2
KM		 1974 * OP_LOCK and OP_LOCKT may return a conflicting lock.
1975 * (Special case because it will just skip encoding this
1976 * if it runs out of xdr buffer space, and it is the only
1977 * operation that behaves this way.)
f7b43d0c 1978 */
7323f0d2 1979 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
f7b43d0c 1980 max_reply += NFS4_OPAQUE_LIMIT;
e372ba60
BF		 1981
1982 if (op->status) {
1983 argp->opcnt = i+1;
1984 break;
1985 }
1da177e4 1986 }
1091006c
BF		 1987 /* Sessions make the DRC unnecessary: */
1988 if (argp->minorversion)
1989 cachethis = false;
b0e35fda 1990 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 1991 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 1992
a5cddc88 1993 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
779fb0f3 1994 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
b0e35fda 1995
1da177e4
LT		 1996 DECODE_TAIL;
1997}
1da177e4 1998
b8800921
N		 1999static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
2000 struct svc_export *exp)
c654b8a9 2001{
b8800921
N		 2002 if (exp->ex_flags & NFSEXP_V4ROOT) {
2003 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
2004 *p++ = 0;
2005 } else if (IS_I_VERSION(inode)) {
39ca1bf6 2006 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
c654b8a9 2007 } else {
d05d5744
BF		 2008 *p++ = cpu_to_be32(stat->ctime.tv_sec);
2009 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
c654b8a9 2010 }
d05d5744 2011 return p;
c654b8a9
BF		 2012}
2013
16945141
BF		 2014/*
2015 * ctime (in NFSv4, time_metadata) is not writeable, and the client
2016 * doesn't really care what resolution could theoretically be stored by
2017 * the filesystem.
2018 *
2019 * The client cares how close together changes can be while still
2020 * guaranteeing ctime changes. For most filesystems (which have
2021 * timestamps with nanosecond fields) that is limited by the resolution
2022 * of the time returned from current_time() (which I'm assuming to be
2023 * 1/HZ).
2024 */
2025static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
2026{
2027 struct timespec ts;
2028 u32 ns;
2029
2030 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
2031 ts = ns_to_timespec(ns);
2032
2033 p = xdr_encode_hyper(p, ts.tv_sec);
2034 *p++ = cpu_to_be32(ts.tv_nsec);
2035
2036 return p;
2037}
2038
d05d5744 2039static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 2040{
d05d5744 2041 *p++ = cpu_to_be32(c->atomic);
c654b8a9 2042 if (c->change_supported) {
d05d5744
BF		 2043 p = xdr_encode_hyper(p, c->before_change);
2044 p = xdr_encode_hyper(p, c->after_change);
c654b8a9 2045 } else {
d05d5744
BF		 2046 *p++ = cpu_to_be32(c->before_ctime_sec);
2047 *p++ = cpu_to_be32(c->before_ctime_nsec);
2048 *p++ = cpu_to_be32(c->after_ctime_sec);
2049 *p++ = cpu_to_be32(c->after_ctime_nsec);
c654b8a9 2050 }
d05d5744 2051 return p;
c654b8a9 2052}
1da177e4 2053
81c3f413 2054/* Encode as an array of strings the string given with components
e7a0444a 2055 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 2056 */
ddd1ea56
BF		 2057static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2058 char *components, char esc_enter,
2059 char esc_exit)
81c3f413 2060{
ddd1ea56 2061 __be32 *p;
082d4bd7
BF		 2062 __be32 pathlen;
2063 int pathlen_offset;
81c3f413 2064 int strlen, count=0;
e7a0444a 2065 char *str, *end, *next;
81c3f413
BF		 2066
2067 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 2068
2069 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 2070 p = xdr_reserve_space(xdr, 4);
2071 if (!p)
81c3f413 2072 return nfserr_resource;
082d4bd7
BF		 2073 p++; /* We will fill this in with @count later */
2074
81c3f413
BF		 2075 end = str = components;
2076 while (*end) {
e7a0444a
WAA		 2077 bool found_esc = false;
2078
2079 /* try to parse as esc_start, ..., esc_end, sep */
2080 if (*str == esc_enter) {
2081 for (; *end && (*end != esc_exit); end++)
2082 /* find esc_exit or end of string */;
2083 next = end + 1;
2084 if (*end && (!*next || *next == sep)) {
2085 str++;
2086 found_esc = true;
2087 }
2088 }
2089
2090 if (!found_esc)
2091 for (; *end && (*end != sep); end++)
2092 /* find sep or end of string */;
2093
81c3f413
BF		 2094 strlen = end - str;
2095 if (strlen) {
ddd1ea56
BF		 2096 p = xdr_reserve_space(xdr, strlen + 4);
2097 if (!p)
81c3f413 2098 return nfserr_resource;
0c0c267b 2099 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 2100 count++;
2101 }
2102 else
2103 end++;
5a64e569
BC		 2104 if (found_esc)
2105 end = next;
2106
81c3f413
BF		 2107 str = end;
2108 }
bf7491f1 2109 pathlen = htonl(count);
082d4bd7 2110 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 2111 return 0;
2112}
2113
e7a0444a
WAA		 2114/* Encode as an array of strings the string given with components
2115 * separated @sep.
2116 */
ddd1ea56
BF		 2117static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2118 char *components)
e7a0444a 2119{
ddd1ea56 2120 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 2121}
2122
81c3f413
BF		 2123/*
2124 * encode a location element of a fs_locations structure
2125 */
ddd1ea56
BF		 2126static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2127 struct nfsd4_fs_location *location)
81c3f413 2128{
b37ad28b 2129 __be32 status;
81c3f413 2130
ddd1ea56 2131 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 2132 '[', ']');
81c3f413
BF		 2133 if (status)
2134 return status;
ddd1ea56 2135 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 2136 if (status)
2137 return status;
81c3f413
BF		 2138 return 0;
2139}
2140
2141/*
ed748aac 2142 * Encode a path in RFC3530 'pathname4' format
81c3f413 2143 */
ddd1ea56
BF		 2144static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2145 const struct path *root,
2146 const struct path *path)
81c3f413 2147{
301f0268 2148 struct path cur = *path;
ddd1ea56 2149 __be32 *p;
ed748aac
TM		 2150 struct dentry **components = NULL;
2151 unsigned int ncomponents = 0;
2152 __be32 err = nfserr_jukebox;
81c3f413 2153
ed748aac 2154 dprintk("nfsd4_encode_components(");
81c3f413 2155
ed748aac
TM		 2156 path_get(&cur);
2157 /* First walk the path up to the nfsd root, and store the
2158 * dentries/path components in an array.
2159 */
2160 for (;;) {
b77a4b2e 2161 if (path_equal(&cur, root))
ed748aac
TM		 2162 break;
2163 if (cur.dentry == cur.mnt->mnt_root) {
2164 if (follow_up(&cur))
2165 continue;
2166 goto out_free;
2167 }
2168 if ((ncomponents & 15) == 0) {
2169 struct dentry **new;
2170 new = krealloc(components,
2171 sizeof(*new) * (ncomponents + 16),
2172 GFP_KERNEL);
2173 if (!new)
2174 goto out_free;
2175 components = new;
2176 }
2177 components[ncomponents++] = cur.dentry;
2178 cur.dentry = dget_parent(cur.dentry);
2179 }
ddd1ea56
BF		 2180 err = nfserr_resource;
2181 p = xdr_reserve_space(xdr, 4);
2182 if (!p)
ed748aac 2183 goto out_free;
c373b0a4 2184 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 2185
2186 while (ncomponents) {
2187 struct dentry *dentry = components[ncomponents - 1];
301f0268 2188 unsigned int len;
ed748aac 2189
301f0268
AV		 2190 spin_lock(&dentry->d_lock);
2191 len = dentry->d_name.len;
ddd1ea56
BF		 2192 p = xdr_reserve_space(xdr, len + 4);
2193 if (!p) {
301f0268 2194 spin_unlock(&dentry->d_lock);
ed748aac 2195 goto out_free;
301f0268 2196 }
0c0c267b 2197 p = xdr_encode_opaque(p, dentry->d_name.name, len);
a455589f 2198 dprintk("/%pd", dentry);
301f0268 2199 spin_unlock(&dentry->d_lock);
ed748aac
TM		 2200 dput(dentry);
2201 ncomponents--;
81c3f413 2202 }
ed748aac 2203
ed748aac
TM		 2204 err = 0;
2205out_free:
2206 dprintk(")\n");
2207 while (ncomponents)
2208 dput(components[--ncomponents]);
2209 kfree(components);
2210 path_put(&cur);
2211 return err;
2212}
2213
ddd1ea56
BF		 2214static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2215 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 2216{
2217 struct svc_export *exp_ps;
2218 __be32 res;
2219
2220 exp_ps = rqst_find_fsidzero_export(rqstp);
2221 if (IS_ERR(exp_ps))
2222 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 2223 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 2224 exp_put(exp_ps);
2225 return res;
81c3f413
BF		 2226}
2227
2228/*
2229 * encode a fs_locations structure
2230 */
ddd1ea56
BF		 2231static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2232 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 2233{
b37ad28b 2234 __be32 status;
cc45f017 2235 int i;
ddd1ea56 2236 __be32 *p;
81c3f413 2237 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 2238
ddd1ea56 2239 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 2240 if (status)
2241 return status;
ddd1ea56
BF		 2242 p = xdr_reserve_space(xdr, 4);
2243 if (!p)
81c3f413 2244 return nfserr_resource;
c373b0a4 2245 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 2246 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 2247 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 2248 if (status)
2249 return status;
2250 }
81c3f413
BF		 2251 return 0;
2252}
1da177e4 2253
3d2544b1
BF		 2254static u32 nfs4_file_type(umode_t mode)
2255{
2256 switch (mode & S_IFMT) {
2257 case S_IFIFO: return NF4FIFO;
2258 case S_IFCHR: return NF4CHR;
2259 case S_IFDIR: return NF4DIR;
2260 case S_IFBLK: return NF4BLK;
2261 case S_IFLNK: return NF4LNK;
2262 case S_IFREG: return NF4REG;
2263 case S_IFSOCK: return NF4SOCK;
2264 default: return NF4BAD;
2265 };
2266}
1da177e4 2267
b37ad28b 2268static inline __be32
ddd1ea56
BF		 2269nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2270 struct nfs4_ace *ace)
1da177e4 2271{
3554116d 2272 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 2273 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 2274 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 2275 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 2276 else
ddd1ea56 2277 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 2278}
2279
6896f15a 2280static inline __be32
8a4c3926 2281nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
6896f15a 2282{
8a4c3926
JL		 2283 __be32 *p;
2284 unsigned long i = hweight_long(layout_types);
6896f15a 2285
8a4c3926
JL		 2286 p = xdr_reserve_space(xdr, 4 + 4 * i);
2287 if (!p)
2288 return nfserr_resource;
2289
2290 *p++ = cpu_to_be32(i);
2291
2292 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2293 if (layout_types & (1 << i))
2294 *p++ = cpu_to_be32(i);
6896f15a
KM		 2295
2296 return 0;
2297}
2298
42ca0993
BF		 2299#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2300 FATTR4_WORD0_RDATTR_ERROR)
2301#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
c2227a39 2302#define WORD2_ABSENT_FS_ATTRS 0
42ca0993 2303
18032ca0
DQ		 2304#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2305static inline __be32
ddd1ea56
BF		 2306nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2307 void *context, int len)
18032ca0 2308{
ddd1ea56 2309 __be32 *p;
18032ca0 2310
ddd1ea56
BF		 2311 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2312 if (!p)
18032ca0
DQ		 2313 return nfserr_resource;
2314
2315 /*
2316 * For now we use a 0 here to indicate the null translation; in
2317 * the future we may place a call to translation code here.
2318 */
c373b0a4
BF		 2319 *p++ = cpu_to_be32(0); /* lfs */
2320 *p++ = cpu_to_be32(0); /* pi */
18032ca0 2321 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 2322 return 0;
2323}
2324#else
2325static inline __be32
ddd1ea56
BF		 2326nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2327 void *context, int len)
18032ca0
DQ		 2328{ return 0; }
2329#endif
2330
c2227a39 2331static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
42ca0993
BF		 2332{
2333 /* As per referral draft: */
2334 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2335 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2336 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2337 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2338 *rdattr_err = NFSERR_MOVED;
2339 else
2340 return nfserr_moved;
2341 }
2342 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2343 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
c2227a39 2344 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
42ca0993
BF		 2345 return 0;
2346}
1da177e4 2347
ae7095a7
BF		 2348
2349static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2350{
2351 struct path path = exp->ex_path;
2352 int err;
2353
2354 path_get(&path);
2355 while (follow_up(&path)) {
2356 if (path.dentry != path.mnt->mnt_root)
2357 break;
2358 }
a528d35e 2359 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
ae7095a7
BF		 2360 path_put(&path);
2361 return err;
2362}
2363
75976de6
KM		 2364static __be32
2365nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2366{
2367 __be32 *p;
2368
2369 if (bmval2) {
2370 p = xdr_reserve_space(xdr, 16);
2371 if (!p)
2372 goto out_resource;
2373 *p++ = cpu_to_be32(3);
2374 *p++ = cpu_to_be32(bmval0);
2375 *p++ = cpu_to_be32(bmval1);
2376 *p++ = cpu_to_be32(bmval2);
2377 } else if (bmval1) {
2378 p = xdr_reserve_space(xdr, 12);
2379 if (!p)
2380 goto out_resource;
2381 *p++ = cpu_to_be32(2);
2382 *p++ = cpu_to_be32(bmval0);
2383 *p++ = cpu_to_be32(bmval1);
2384 } else {
2385 p = xdr_reserve_space(xdr, 8);
2386 if (!p)
2387 goto out_resource;
2388 *p++ = cpu_to_be32(1);
2389 *p++ = cpu_to_be32(bmval0);
2390 }
2391
2392 return 0;
2393out_resource:
2394 return nfserr_resource;
2395}
2396
1da177e4
LT		 2397/*
2398 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2399 * ourselves.
1da177e4 2400 */
da2ebce6 2401static __be32
d5184658
BF		 2402nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2403 struct svc_export *exp,
2404 struct dentry *dentry, u32 *bmval,
406a7ea9 2405 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2406{
2407 u32 bmval0 = bmval[0];
2408 u32 bmval1 = bmval[1];
7e705706 2409 u32 bmval2 = bmval[2];
1da177e4 2410 struct kstat stat;
d50e6136 2411 struct svc_fh *tempfh = NULL;
1da177e4 2412 struct kstatfs statfs;
ddd1ea56 2413 __be32 *p;
1fcea5b2 2414 int starting_len = xdr->buf->len;
082d4bd7
BF		 2415 int attrlen_offset;
2416 __be32 attrlen;
1da177e4
LT		 2417 u32 dummy;
2418 u64 dummy64;
42ca0993 2419 u32 rdattr_err = 0;
b37ad28b 2420 __be32 status;
b8dd7b9a 2421 int err;
1da177e4 2422 struct nfs4_acl *acl = NULL;
0ab88ca4 2423#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2424 void *context = NULL;
2425 int contextlen;
0ab88ca4 2426#endif
18032ca0 2427 bool contextsupport = false;
7e705706
AA		 2428 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2429 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2430 struct path path = {
2431 .mnt = exp->ex_path.mnt,
2432 .dentry = dentry,
2433 };
3d733711 2434 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2435
2436 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
916d2d84 2437 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
1da177e4 2438
42ca0993 2439 if (exp->ex_fslocs.migrated) {
c2227a39 2440 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
42ca0993
BF		 2441 if (status)
2442 goto out;
2443 }
2444
a528d35e 2445 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
b8dd7b9a 2446 if (err)
1da177e4 2447 goto out_nfserr;
12337901
CH		 2448 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2449 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2450 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2451 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2452 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2453 if (err)
1da177e4
LT		 2454 goto out_nfserr;
2455 }
2456 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2457 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2458 status = nfserr_jukebox;
2459 if (!tempfh)
2460 goto out;
2461 fh_init(tempfh, NFS4_FHSIZE);
2462 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2463 if (status)
2464 goto out;
d50e6136 2465 fhp = tempfh;
1da177e4 2466 }
0c9d65e7 2467 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2468 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
0c9d65e7
AG		 2469 if (err == -EOPNOTSUPP)
2470 bmval0 &= ~FATTR4_WORD0_ACL;
2471 else if (err == -EINVAL) {
2472 status = nfserr_attrnotsupp;
2473 goto out;
2474 } else if (err != 0)
2475 goto out_nfserr;
1da177e4 2476 }
1da177e4 2477
18032ca0 2478#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
c2227a39
KM		 2479 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2480 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
32ddd944
BF		 2481 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2482 err = security_inode_getsecctx(d_inode(dentry),
18032ca0 2483 &context, &contextlen);
32ddd944
BF		 2484 else
2485 err = -EOPNOTSUPP;
18032ca0
DQ		 2486 contextsupport = (err == 0);
2487 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2488 if (err == -EOPNOTSUPP)
2489 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2490 else if (err)
2491 goto out_nfserr;
2492 }
2493 }
2494#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2495
75976de6
KM		 2496 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2497 if (status)
2498 goto out;
082d4bd7
BF		 2499
2500 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2501 p = xdr_reserve_space(xdr, 4);
2502 if (!p)
2503 goto out_resource;
082d4bd7 2504 p++; /* to be backfilled later */
1da177e4
LT		 2505
2506 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
dcd20869
BF		 2507 u32 supp[3];
2508
2509 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
7e705706 2510
0c9d65e7 2511 if (!IS_POSIXACL(dentry->d_inode))
916d2d84 2512 supp[0] &= ~FATTR4_WORD0_ACL;
18032ca0 2513 if (!contextsupport)
916d2d84
BF		 2514 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2515 if (!supp[2]) {
ddd1ea56
BF		 2516 p = xdr_reserve_space(xdr, 12);
2517 if (!p)
2b44f1ba 2518 goto out_resource;
c373b0a4 2519 *p++ = cpu_to_be32(2);
916d2d84
BF		 2520 *p++ = cpu_to_be32(supp[0]);
2521 *p++ = cpu_to_be32(supp[1]);
7e705706 2522 } else {
ddd1ea56
BF		 2523 p = xdr_reserve_space(xdr, 16);
2524 if (!p)
2b44f1ba 2525 goto out_resource;
c373b0a4 2526 *p++ = cpu_to_be32(3);
916d2d84
BF		 2527 *p++ = cpu_to_be32(supp[0]);
2528 *p++ = cpu_to_be32(supp[1]);
2529 *p++ = cpu_to_be32(supp[2]);
7e705706 2530 }
1da177e4
LT		 2531 }
2532 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2533 p = xdr_reserve_space(xdr, 4);
2534 if (!p)
1da177e4 2535 goto out_resource;
3d2544b1 2536 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2537 if (dummy == NF4BAD) {
2538 status = nfserr_serverfault;
2539 goto out;
2540 }
c373b0a4 2541 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2542 }
2543 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2544 p = xdr_reserve_space(xdr, 4);
2545 if (!p)
1da177e4 2546 goto out_resource;
49640001 2547 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2548 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2549 else
c373b0a4
BF		 2550 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2551 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2552 }
2553 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2554 p = xdr_reserve_space(xdr, 8);
2555 if (!p)
1da177e4 2556 goto out_resource;
b8800921 2557 p = encode_change(p, &stat, d_inode(dentry), exp);
1da177e4
LT		 2558 }
2559 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2560 p = xdr_reserve_space(xdr, 8);
2561 if (!p)
1da177e4 2562 goto out_resource;
b64c7f3b 2563 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2564 }
2565 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2566 p = xdr_reserve_space(xdr, 4);
2567 if (!p)
1da177e4 2568 goto out_resource;
c373b0a4 2569 *p++ = cpu_to_be32(1);
1da177e4
LT		 2570 }
2571 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2572 p = xdr_reserve_space(xdr, 4);
2573 if (!p)
1da177e4 2574 goto out_resource;
c373b0a4 2575 *p++ = cpu_to_be32(1);
1da177e4
LT		 2576 }
2577 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2578 p = xdr_reserve_space(xdr, 4);
2579 if (!p)
1da177e4 2580 goto out_resource;
c373b0a4 2581 *p++ = cpu_to_be32(0);
1da177e4
LT		 2582 }
2583 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2584 p = xdr_reserve_space(xdr, 16);
2585 if (!p)
1da177e4 2586 goto out_resource;
42ca0993 2587 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 2588 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2589 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2590 } else switch(fsid_source(fhp)) {
2591 case FSIDSOURCE_FSID:
b64c7f3b
BF		 2592 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2593 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 2594 break;
2595 case FSIDSOURCE_DEV:
c373b0a4
BF		 2596 *p++ = cpu_to_be32(0);
2597 *p++ = cpu_to_be32(MAJOR(stat.dev));
2598 *p++ = cpu_to_be32(0);
2599 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 2600 break;
2601 case FSIDSOURCE_UUID:
94eb3689
KM		 2602 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2603 EX_UUID_LEN);
af6a4e28 2604 break;
1da177e4
LT		 2605 }
2606 }
2607 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2608 p = xdr_reserve_space(xdr, 4);
2609 if (!p)
1da177e4 2610 goto out_resource;
c373b0a4 2611 *p++ = cpu_to_be32(0);
1da177e4
LT		 2612 }
2613 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2614 p = xdr_reserve_space(xdr, 4);
2615 if (!p)
1da177e4 2616 goto out_resource;
c373b0a4 2617 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 2618 }
2619 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2620 p = xdr_reserve_space(xdr, 4);
2621 if (!p)
1da177e4 2622 goto out_resource;
c373b0a4 2623 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 2624 }
2625 if (bmval0 & FATTR4_WORD0_ACL) {
2626 struct nfs4_ace *ace;
1da177e4
LT		 2627
2628 if (acl == NULL) {
ddd1ea56
BF		 2629 p = xdr_reserve_space(xdr, 4);
2630 if (!p)
1da177e4
LT		 2631 goto out_resource;
2632
c373b0a4 2633 *p++ = cpu_to_be32(0);
1da177e4
LT		 2634 goto out_acl;
2635 }
ddd1ea56
BF		 2636 p = xdr_reserve_space(xdr, 4);
2637 if (!p)
1da177e4 2638 goto out_resource;
c373b0a4 2639 *p++ = cpu_to_be32(acl->naces);
1da177e4 2640
28e05dd8 2641 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2642 p = xdr_reserve_space(xdr, 4*3);
2643 if (!p)
1da177e4 2644 goto out_resource;
c373b0a4
BF		 2645 *p++ = cpu_to_be32(ace->type);
2646 *p++ = cpu_to_be32(ace->flag);
2647 *p++ = cpu_to_be32(ace->access_mask &
2648 NFS4_ACE_MASK_ALL);
ddd1ea56 2649 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2650 if (status)
2651 goto out;
2652 }
2653 }
2654out_acl:
2655 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2656 p = xdr_reserve_space(xdr, 4);
2657 if (!p)
1da177e4 2658 goto out_resource;
0c9d65e7 2659 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
1da177e4
LT		 2660 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2661 }
2662 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2663 p = xdr_reserve_space(xdr, 4);
2664 if (!p)
1da177e4 2665 goto out_resource;
c373b0a4 2666 *p++ = cpu_to_be32(1);
1da177e4
LT		 2667 }
2668 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2669 p = xdr_reserve_space(xdr, 4);
2670 if (!p)
1da177e4 2671 goto out_resource;
c373b0a4 2672 *p++ = cpu_to_be32(0);
1da177e4
LT		 2673 }
2674 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2675 p = xdr_reserve_space(xdr, 4);
2676 if (!p)
1da177e4 2677 goto out_resource;
c373b0a4 2678 *p++ = cpu_to_be32(1);
1da177e4
LT		 2679 }
2680 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2681 p = xdr_reserve_space(xdr, 4);
2682 if (!p)
1da177e4 2683 goto out_resource;
c373b0a4 2684 *p++ = cpu_to_be32(1);
1da177e4
LT		 2685 }
2686 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2687 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2688 if (!p)
1da177e4 2689 goto out_resource;
0c0c267b
BF		 2690 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2691 fhp->fh_handle.fh_size);
1da177e4
LT		 2692 }
2693 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2694 p = xdr_reserve_space(xdr, 8);
2695 if (!p)
1da177e4 2696 goto out_resource;
b64c7f3b 2697 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 2698 }
2699 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2700 p = xdr_reserve_space(xdr, 8);
2701 if (!p)
1da177e4 2702 goto out_resource;
b64c7f3b 2703 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2704 }
2705 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2706 p = xdr_reserve_space(xdr, 8);
2707 if (!p)
1da177e4 2708 goto out_resource;
b64c7f3b 2709 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2710 }
2711 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2712 p = xdr_reserve_space(xdr, 8);
2713 if (!p)
1da177e4 2714 goto out_resource;
b64c7f3b 2715 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 2716 }
81c3f413 2717 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2718 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2719 if (status)
2720 goto out;
2721 }
1da177e4 2722 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2723 p = xdr_reserve_space(xdr, 4);
2724 if (!p)
1da177e4 2725 goto out_resource;
c373b0a4 2726 *p++ = cpu_to_be32(1);
1da177e4
LT		 2727 }
2728 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2729 p = xdr_reserve_space(xdr, 8);
2730 if (!p)
1da177e4 2731 goto out_resource;
b64c7f3b 2732 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2733 }
2734 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2735 p = xdr_reserve_space(xdr, 4);
2736 if (!p)
1da177e4 2737 goto out_resource;
c373b0a4 2738 *p++ = cpu_to_be32(255);
1da177e4
LT		 2739 }
2740 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2741 p = xdr_reserve_space(xdr, 4);
2742 if (!p)
1da177e4 2743 goto out_resource;
c373b0a4 2744 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 2745 }
2746 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2747 p = xdr_reserve_space(xdr, 8);
2748 if (!p)
1da177e4 2749 goto out_resource;
b64c7f3b 2750 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2751 }
2752 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2753 p = xdr_reserve_space(xdr, 8);
2754 if (!p)
1da177e4 2755 goto out_resource;
b64c7f3b 2756 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2757 }
2758 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2759 p = xdr_reserve_space(xdr, 4);
2760 if (!p)
1da177e4 2761 goto out_resource;
c373b0a4 2762 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 2763 }
2764 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2765 p = xdr_reserve_space(xdr, 4);
2766 if (!p)
1da177e4 2767 goto out_resource;
c373b0a4 2768 *p++ = cpu_to_be32(1);
1da177e4
LT		 2769 }
2770 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2771 p = xdr_reserve_space(xdr, 4);
2772 if (!p)
1da177e4 2773 goto out_resource;
c373b0a4 2774 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 2775 }
2776 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2777 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2778 if (status)
2779 goto out;
2780 }
2781 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2782 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2783 if (status)
2784 goto out;
2785 }
2786 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2787 p = xdr_reserve_space(xdr, 8);
2788 if (!p)
1da177e4 2789 goto out_resource;
c373b0a4
BF		 2790 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2791 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 2792 }
2793 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2794 p = xdr_reserve_space(xdr, 8);
2795 if (!p)
1da177e4
LT		 2796 goto out_resource;
2797 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 2798 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2799 }
2800 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2801 p = xdr_reserve_space(xdr, 8);
2802 if (!p)
1da177e4
LT		 2803 goto out_resource;
2804 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 2805 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2806 }
2807 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2808 p = xdr_reserve_space(xdr, 8);
2809 if (!p)
1da177e4
LT		 2810 goto out_resource;
2811 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 2812 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2813 }
2814 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2815 p = xdr_reserve_space(xdr, 8);
2816 if (!p)
1da177e4
LT		 2817 goto out_resource;
2818 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 2819 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2820 }
2821 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2822 p = xdr_reserve_space(xdr, 12);
2823 if (!p)
1da177e4 2824 goto out_resource;
b64c7f3b 2825 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 2826 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 2827 }
2828 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2829 p = xdr_reserve_space(xdr, 12);
2830 if (!p)
1da177e4 2831 goto out_resource;
16945141 2832 p = encode_time_delta(p, d_inode(dentry));
1da177e4
LT		 2833 }
2834 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2835 p = xdr_reserve_space(xdr, 12);
2836 if (!p)
1da177e4 2837 goto out_resource;
b64c7f3b 2838 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 2839 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 2840 }
2841 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2842 p = xdr_reserve_space(xdr, 12);
2843 if (!p)
1da177e4 2844 goto out_resource;
b64c7f3b 2845 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 2846 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 2847 }
2848 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
0a2050d7
KM		 2849 struct kstat parent_stat;
2850 u64 ino = stat.ino;
2851
ddd1ea56
BF		 2852 p = xdr_reserve_space(xdr, 8);
2853 if (!p)
1da177e4 2854 goto out_resource;
406a7ea9
FF		 2855 /*
2856 * Get parent's attributes if not ignoring crossmount
2857 * and this is the root of a cross-mounted filesystem.
2858 */
2859 if (ignore_crossmnt == 0 &&
0a2050d7
KM		 2860 dentry == exp->ex_path.mnt->mnt_root) {
2861 err = get_parent_attributes(exp, &parent_stat);
2862 if (err)
2863 goto out_nfserr;
2864 ino = parent_stat.ino;
2865 }
2866 p = xdr_encode_hyper(p, ino);
1da177e4 2867 }
9cf514cc 2868#ifdef CONFIG_NFSD_PNFS
6896f15a 2869 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
8a4c3926 2870 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 2871 if (status)
2872 goto out;
2873 }
2874
2875 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
8a4c3926 2876 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 2877 if (status)
2878 goto out;
9cf514cc
CH		 2879 }
2880
2881 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2882 p = xdr_reserve_space(xdr, 4);
2883 if (!p)
2884 goto out_resource;
2885 *p++ = cpu_to_be32(stat.blksize);
2886 }
2887#endif /* CONFIG_NFSD_PNFS */
8c18f205 2888 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
b26b78cb
TM		 2889 u32 supp[3];
2890
2891 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2892 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
2893 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
2894 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
2895
2896 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
75976de6
KM		 2897 if (status)
2898 goto out;
8c18f205 2899 }
7e705706 2900
a8585763
BF		 2901 if (bmval2 & FATTR4_WORD2_CHANGE_ATTR_TYPE) {
2902 p = xdr_reserve_space(xdr, 4);
2903 if (!p)
2904 goto out_resource;
2905 if (IS_I_VERSION(d_inode(dentry)))
2906 *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR);
2907 else
2908 *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_TIME_METADATA);
2909 }
2910
0ab88ca4 2911#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
7d580722
KM		 2912 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2913 status = nfsd4_encode_security_label(xdr, rqstp, context,
2914 contextlen);
2915 if (status)
2916 goto out;
2917 }
0ab88ca4 2918#endif
7d580722 2919
082d4bd7
BF		 2920 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2921 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2922 status = nfs_ok;
2923
2924out:
ba4e55bb 2925#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2926 if (context)
2927 security_release_secctx(context, contextlen);
ba4e55bb 2928#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2929 kfree(acl);
18df11d0 2930 if (tempfh) {
d50e6136 2931 fh_put(tempfh);
18df11d0
YZ		 2932 kfree(tempfh);
2933 }
1fcea5b2
BF		 2934 if (status)
2935 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2936 return status;
2937out_nfserr:
b8dd7b9a 2938 status = nfserrno(err);
1da177e4
LT		 2939 goto out;
2940out_resource:
1da177e4
LT		 2941 status = nfserr_resource;
2942 goto out;
1da177e4
LT		 2943}
2944
2825a7f9
BF		 2945static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2946 struct xdr_buf *buf, __be32 *p, int bytes)
2947{
2948 xdr->scratch.iov_len = 0;
2949 memset(buf, 0, sizeof(struct xdr_buf));
2950 buf->head[0].iov_base = p;
2951 buf->head[0].iov_len = 0;
2952 buf->len = 0;
2953 xdr->buf = buf;
2954 xdr->iov = buf->head;
2955 xdr->p = p;
2956 xdr->end = (void *)p + bytes;
2957 buf->buflen = bytes;
2958}
2959
d5184658
BF		 2960__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2961 struct svc_fh *fhp, struct svc_export *exp,
2962 struct dentry *dentry, u32 *bmval,
2963 struct svc_rqst *rqstp, int ignore_crossmnt)
2964{
2825a7f9 2965 struct xdr_buf dummy;
d5184658
BF		 2966 struct xdr_stream xdr;
2967 __be32 ret;
2968
2825a7f9 2969 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2970 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2971 ignore_crossmnt);
2972 *p = xdr.p;
2973 return ret;
2974}
2975
c0ce6ec8
BF		 2976static inline int attributes_need_mount(u32 *bmval)
2977{
2978 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2979 return 1;
2980 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2981 return 1;
2982 return 0;
2983}
2984
b37ad28b 2985static __be32
561f0ed4
BF		 2986nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2987 const char *name, int namlen)
1da177e4
LT		 2988{
2989 struct svc_export *exp = cd->rd_fhp->fh_export;
2990 struct dentry *dentry;
b37ad28b 2991 __be32 nfserr;
406a7ea9 2992 int ignore_crossmnt = 0;
1da177e4 2993
bbddca8e 2994 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
1da177e4
LT		 2995 if (IS_ERR(dentry))
2996 return nfserrno(PTR_ERR(dentry));
2b0143b5 2997 if (d_really_is_negative(dentry)) {
b2c0cea6 2998 /*
bbddca8e
N		 2999 * we're not holding the i_mutex here, so there's
3000 * a window where this directory entry could have gone
3001 * away.
b2c0cea6
BF		 3002 */
3003 dput(dentry);
3004 return nfserr_noent;
3005 }
1da177e4
LT		 3006
3007 exp_get(exp);
406a7ea9
FF		 3008 /*
3009 * In the case of a mountpoint, the client may be asking for
3010 * attributes that are only properties of the underlying filesystem
3011 * as opposed to the cross-mounted file system. In such a case,
3012 * we will not follow the cross mount and will fill the attribtutes
3013 * directly from the mountpoint dentry.
3014 */
3227fa41 3015 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 3016 int err;
3017
3227fa41
BF		 3018 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3019 && !attributes_need_mount(cd->rd_bmval)) {
3020 ignore_crossmnt = 1;
3021 goto out_encode;
3022 }
dcb488a3
AA		 3023 /*
3024 * Why the heck aren't we just using nfsd_lookup??
3025 * Different "."/".." handling? Something else?
3026 * At least, add a comment here to explain....
3027 */
021d3a72
BF		 3028 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3029 if (err) {
3030 nfserr = nfserrno(err);
1da177e4
LT		 3031 goto out_put;
3032 }
dcb488a3
AA		 3033 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3034 if (nfserr)
3035 goto out_put;
1da177e4
LT		 3036
3037 }
3227fa41 3038out_encode:
561f0ed4 3039 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 3040 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 3041out_put:
3042 dput(dentry);
3043 exp_put(exp);
3044 return nfserr;
3045}
3046
2ebbc012 3047static __be32 *
561f0ed4 3048nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 3049{
561f0ed4
BF		 3050 __be32 *p;
3051
c3a45617 3052 p = xdr_reserve_space(xdr, 20);
561f0ed4 3053 if (!p)
1da177e4
LT		 3054 return NULL;
3055 *p++ = htonl(2);
3056 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
3057 *p++ = htonl(0); /* bmval1 */
3058
87915c64 3059 *p++ = htonl(4); /* attribute length */
1da177e4 3060 *p++ = nfserr; /* no htonl */
1da177e4
LT		 3061 return p;
3062}
3063
3064static int
a0ad13ef
N		 3065nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3066 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 3067{
a0ad13ef 3068 struct readdir_cd *ccd = ccdv;
1da177e4 3069 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 3070 struct xdr_stream *xdr = cd->xdr;
3071 int start_offset = xdr->buf->len;
3072 int cookie_offset;
aee37764 3073 u32 name_and_cookie;
561f0ed4 3074 int entry_bytes;
b37ad28b 3075 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 3076 __be64 wire_offset;
3077 __be32 *p;
1da177e4
LT		 3078
3079 /* In nfsv4, "." and ".." never make it onto the wire.. */
3080 if (name && isdotent(name, namlen)) {
3081 cd->common.err = nfs_ok;
3082 return 0;
3083 }
3084
561f0ed4
BF		 3085 if (cd->cookie_offset) {
3086 wire_offset = cpu_to_be64(offset);
3087 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3088 &wire_offset, 8);
3089 }
1da177e4 3090
561f0ed4
BF		 3091 p = xdr_reserve_space(xdr, 4);
3092 if (!p)
1da177e4 3093 goto fail;
1da177e4 3094 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 3095 cookie_offset = xdr->buf->len;
3096 p = xdr_reserve_space(xdr, 3*4 + namlen);
3097 if (!p)
3098 goto fail;
1da177e4
LT		 3099 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
3100 p = xdr_encode_array(p, name, namlen); /* name length & name */
3101
561f0ed4 3102 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 3103 switch (nfserr) {
3104 case nfs_ok:
1da177e4
LT		 3105 break;
3106 case nfserr_resource:
3107 nfserr = nfserr_toosmall;
3108 goto fail;
b2c0cea6 3109 case nfserr_noent:
f41c5ad2 3110 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 3111 goto skip_entry;
1da177e4
LT		 3112 default:
3113 /*
3114 * If the client requested the RDATTR_ERROR attribute,
3115 * we stuff the error code into this attribute
3116 * and continue. If this attribute was not requested,
3117 * then in accordance with the spec, we fail the
3118 * entire READDIR operation(!)
3119 */
3120 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3121 goto fail;
561f0ed4 3122 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 3123 if (p == NULL) {
3124 nfserr = nfserr_toosmall;
1da177e4 3125 goto fail;
34081efc 3126 }
1da177e4 3127 }
561f0ed4
BF		 3128 nfserr = nfserr_toosmall;
3129 entry_bytes = xdr->buf->len - start_offset;
3130 if (entry_bytes > cd->rd_maxcount)
3131 goto fail;
3132 cd->rd_maxcount -= entry_bytes;
aee37764
BF		 3133 /*
3134 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3135 * let's always let through the first entry, at least:
3136 */
0ec016e3
BF		 3137 if (!cd->rd_dircount)
3138 goto fail;
3139 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
aee37764
BF		 3140 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3141 goto fail;
3142 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
0ec016e3 3143
561f0ed4 3144 cd->cookie_offset = cookie_offset;
b2c0cea6 3145skip_entry:
1da177e4
LT		 3146 cd->common.err = nfs_ok;
3147 return 0;
3148fail:
561f0ed4 3149 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 3150 cd->common.err = nfserr;
3151 return -EINVAL;
3152}
3153
d0a381dd
BF		 3154static __be32
3155nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 3156{
bc749ca4 3157 __be32 *p;
e2f282b9 3158
d0a381dd
BF		 3159 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3160 if (!p)
3161 return nfserr_resource;
c373b0a4 3162 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 3163 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3164 sizeof(stateid_opaque_t));
d0a381dd 3165 return 0;
e2f282b9
BH		 3166}
3167
695e12f8 3168static __be32
b37ad28b 3169nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 3170{
d0a381dd 3171 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3172 __be32 *p;
1da177e4 3173
bac966d6
BF		 3174 p = xdr_reserve_space(xdr, 8);
3175 if (!p)
3176 return nfserr_resource;
3177 *p++ = cpu_to_be32(access->ac_supported);
3178 *p++ = cpu_to_be32(access->ac_resp_access);
3179 return 0;
1da177e4
LT		 3180}
3181
1d1bc8f2
BF		 3182static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3183{
d0a381dd 3184 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 3185 __be32 *p;
3186
bac966d6
BF		 3187 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3188 if (!p)
3189 return nfserr_resource;
3190 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3191 NFS4_MAX_SESSIONID_LEN);
3192 *p++ = cpu_to_be32(bcts->dir);
3193 /* Upshifting from TCP to RDMA is not supported */
3194 *p++ = cpu_to_be32(0);
3195 return 0;
1d1bc8f2
BF		 3196}
3197
695e12f8 3198static __be32
b37ad28b 3199nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 3200{
d0a381dd
BF		 3201 struct xdr_stream *xdr = &resp->xdr;
3202
bac966d6 3203 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
1da177e4
LT		 3204}
3205
3206
695e12f8 3207static __be32
b37ad28b 3208nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 3209{
d0a381dd 3210 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3211 __be32 *p;
1da177e4 3212
bac966d6
BF		 3213 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3214 if (!p)
3215 return nfserr_resource;
3216 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
0c0c267b 3217 NFS4_VERIFIER_SIZE);
bac966d6 3218 return 0;
1da177e4
LT		 3219}
3220
695e12f8 3221static __be32
b37ad28b 3222nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 3223{
d0a381dd 3224 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3225 __be32 *p;
1da177e4 3226
bac966d6
BF		 3227 p = xdr_reserve_space(xdr, 20);
3228 if (!p)
3229 return nfserr_resource;
3230 encode_cinfo(p, &create->cr_cinfo);
b96811cd 3231 return nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
bac966d6 3232 create->cr_bmval[1], create->cr_bmval[2]);
1da177e4
LT		 3233}
3234
b37ad28b
AV		 3235static __be32
3236nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 3237{
3238 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 3239 struct xdr_stream *xdr = &resp->xdr;
1da177e4 3240
bac966d6
BF		 3241 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3242 getattr->ga_bmval, resp->rqstp, 0);
1da177e4
LT		 3243}
3244
695e12f8
BH		 3245static __be32
3246nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 3247{
d0a381dd 3248 struct xdr_stream *xdr = &resp->xdr;
695e12f8 3249 struct svc_fh *fhp = *fhpp;
1da177e4 3250 unsigned int len;
bc749ca4 3251 __be32 *p;
1da177e4 3252
bac966d6
BF		 3253 len = fhp->fh_handle.fh_size;
3254 p = xdr_reserve_space(xdr, len + 4);
3255 if (!p)
3256 return nfserr_resource;
3257 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3258 return 0;
1da177e4
LT		 3259}
3260
3261/*
3262* Including all fields other than the name, a LOCK4denied structure requires
3263* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3264*/
d0a381dd
BF		 3265static __be32
3266nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 3267{
7c13f344 3268 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 3269 __be32 *p;
1da177e4 3270
8c7424cf 3271again:
d0a381dd 3272 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 3273 if (!p) {
3274 /*
3275 * Don't fail to return the result just because we can't
3276 * return the conflicting open:
3277 */
3278 if (conf->len) {
f98bac5a 3279 kfree(conf->data);
8c7424cf
BF		 3280 conf->len = 0;
3281 conf->data = NULL;
3282 goto again;
3283 }
d0a381dd 3284 return nfserr_resource;
8c7424cf 3285 }
b64c7f3b
BF		 3286 p = xdr_encode_hyper(p, ld->ld_start);
3287 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 3288 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 3289 if (conf->len) {
0c0c267b
BF		 3290 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3291 p = xdr_encode_opaque(p, conf->data, conf->len);
f98bac5a 3292 kfree(conf->data);
1da177e4 3293 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 3294 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 3295 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 3296 }
d0a381dd 3297 return nfserr_denied;
1da177e4
LT		 3298}
3299
695e12f8 3300static __be32
b37ad28b 3301nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 3302{
d0a381dd
BF		 3303 struct xdr_stream *xdr = &resp->xdr;
3304
e2f282b9 3305 if (!nfserr)
d0a381dd 3306 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 3307 else if (nfserr == nfserr_denied)
d0a381dd 3308 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
f98bac5a 3309
695e12f8 3310 return nfserr;
1da177e4
LT		 3311}
3312
695e12f8 3313static __be32
b37ad28b 3314nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 3315{
d0a381dd
BF		 3316 struct xdr_stream *xdr = &resp->xdr;
3317
1da177e4 3318 if (nfserr == nfserr_denied)
d0a381dd 3319 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 3320 return nfserr;
1da177e4
LT		 3321}
3322
695e12f8 3323static __be32
b37ad28b 3324nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 3325{
d0a381dd
BF		 3326 struct xdr_stream *xdr = &resp->xdr;
3327
bac966d6 3328 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
1da177e4
LT		 3329}
3330
3331
695e12f8 3332static __be32
b37ad28b 3333nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 3334{
d0a381dd 3335 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3336 __be32 *p;
1da177e4 3337
bac966d6
BF		 3338 p = xdr_reserve_space(xdr, 20);
3339 if (!p)
3340 return nfserr_resource;
3341 p = encode_cinfo(p, &link->li_cinfo);
3342 return 0;
1da177e4
LT		 3343}
3344
3345
695e12f8 3346static __be32
b37ad28b 3347nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 3348{
d0a381dd 3349 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3350 __be32 *p;
1da177e4 3351
d0a381dd
BF		 3352 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3353 if (nfserr)
bac966d6 3354 return nfserr;
75976de6 3355 p = xdr_reserve_space(xdr, 24);
d0a381dd
BF		 3356 if (!p)
3357 return nfserr_resource;
d05d5744 3358 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4 3359 *p++ = cpu_to_be32(open->op_rflags);
1da177e4 3360
75976de6
KM		 3361 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3362 open->op_bmval[2]);
3363 if (nfserr)
bac966d6 3364 return nfserr;
75976de6
KM		 3365
3366 p = xdr_reserve_space(xdr, 4);
3367 if (!p)
3368 return nfserr_resource;
3369
3370 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 3371 switch (open->op_delegate_type) {
3372 case NFS4_OPEN_DELEGATE_NONE:
3373 break;
3374 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 3375 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3376 if (nfserr)
3377 return nfserr;
3378 p = xdr_reserve_space(xdr, 20);
3379 if (!p)
3380 return nfserr_resource;
c373b0a4 3381 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 3382
3383 /*
3384 * TODO: ACE's in delegations
3385 */
c373b0a4
BF		 3386 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3387 *p++ = cpu_to_be32(0);
3388 *p++ = cpu_to_be32(0);
3389 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 3390 break;
3391 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 3392 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3393 if (nfserr)
3394 return nfserr;
3395 p = xdr_reserve_space(xdr, 32);
3396 if (!p)
3397 return nfserr_resource;
c373b0a4 3398 *p++ = cpu_to_be32(0);
1da177e4
LT		 3399
3400 /*
3401 * TODO: space_limit's in delegations
3402 */
c373b0a4
BF		 3403 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3404 *p++ = cpu_to_be32(~(u32)0);
3405 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3406
3407 /*
3408 * TODO: ACE's in delegations
3409 */
c373b0a4
BF		 3410 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3411 *p++ = cpu_to_be32(0);
3412 *p++ = cpu_to_be32(0);
3413 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3414 break;
d24433cd
BH		 3415 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3416 switch (open->op_why_no_deleg) {
3417 case WND4_CONTENTION:
3418 case WND4_RESOURCE:
d0a381dd
BF		 3419 p = xdr_reserve_space(xdr, 8);
3420 if (!p)
3421 return nfserr_resource;
c373b0a4
BF		 3422 *p++ = cpu_to_be32(open->op_why_no_deleg);
3423 /* deleg signaling not supported yet: */
3424 *p++ = cpu_to_be32(0);
d24433cd
BH		 3425 break;
3426 default:
d0a381dd
BF		 3427 p = xdr_reserve_space(xdr, 4);
3428 if (!p)
3429 return nfserr_resource;
c373b0a4 3430 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3431 }
d24433cd 3432 break;
1da177e4
LT		 3433 default:
3434 BUG();
3435 }
3436 /* XXX save filehandle here */
bac966d6 3437 return 0;
1da177e4
LT		 3438}
3439
695e12f8 3440static __be32
b37ad28b 3441nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3442{
d0a381dd
BF		 3443 struct xdr_stream *xdr = &resp->xdr;
3444
bac966d6 3445 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4
LT		 3446}
3447
695e12f8 3448static __be32
b37ad28b 3449nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3450{
d0a381dd
BF		 3451 struct xdr_stream *xdr = &resp->xdr;
3452
bac966d6 3453 return nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4
LT		 3454}
3455
dc97618d
BF		 3456static __be32 nfsd4_encode_splice_read(
3457 struct nfsd4_compoundres *resp,
3458 struct nfsd4_read *read,
3459 struct file *file, unsigned long maxcount)
1da177e4 3460{
ddd1ea56 3461 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3462 struct xdr_buf *buf = xdr->buf;
dc97618d 3463 u32 eof;
ac503e4a 3464 long len;
30596768 3465 int space_left;
dc97618d 3466 __be32 nfserr;
fec25fa4 3467 __be32 *p = xdr->p - 2;
1da177e4 3468
d5d5c304
KM		 3469 /* Make sure there will be room for padding if needed */
3470 if (xdr->end - xdr->p < 1)
d0a381dd 3471 return nfserr_resource;
dc97618d 3472
ac503e4a 3473 len = maxcount;
87c5942e 3474 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
83a63072 3475 file, read->rd_offset, &maxcount, &eof);
87c5942e 3476 read->rd_length = maxcount;
dc97618d
BF		 3477 if (nfserr) {
3478 /*
3479 * nfsd_splice_actor may have already messed with the
3480 * page length; reset it so as not to confuse
3481 * xdr_truncate_encode:
3482 */
34a78b48 3483 buf->page_len = 0;
dc97618d 3484 return nfserr;
b0e35fda 3485 }
1da177e4 3486
fec25fa4
BF		 3487 *(p++) = htonl(eof);
3488 *(p++) = htonl(maxcount);
dc97618d 3489
34a78b48
BF		 3490 buf->page_len = maxcount;
3491 buf->len += maxcount;
15b23ef5
BF		 3492 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3493 / PAGE_SIZE;
dc97618d
BF		 3494
3495 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3496 buf->tail[0].iov_base = xdr->p;
3497 buf->tail[0].iov_len = 0;
fec25fa4 3498 xdr->iov = buf->tail;
dc97618d 3499 if (maxcount&3) {
fec25fa4
BF		 3500 int pad = 4 - (maxcount&3);
3501
3502 *(xdr->p++) = 0;
3503
34a78b48 3504 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3505 buf->tail[0].iov_len = pad;
3506 buf->len += pad;
b0e35fda 3507 }
2825a7f9 3508
dc97618d 3509 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3510 buf->buflen - buf->len);
3511 buf->buflen = buf->len + space_left;
dc97618d
BF		 3512 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3513
3514 return 0;
3515}
3516
3517static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3518 struct nfsd4_read *read,
3519 struct file *file, unsigned long maxcount)
3520{
3521 struct xdr_stream *xdr = &resp->xdr;
3522 u32 eof;
3523 int v;
dc97618d 3524 int starting_len = xdr->buf->len - 8;
dc97618d 3525 long len;
b0420980 3526 int thislen;
dc97618d
BF		 3527 __be32 nfserr;
3528 __be32 tmp;
3529 __be32 *p;
b0420980
BF		 3530 u32 zzz = 0;
3531 int pad;
1da177e4
LT		 3532
3533 len = maxcount;
3534 v = 0;
6ff9897d 3535
1055414f 3536 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
b0420980
BF		 3537 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3538 WARN_ON_ONCE(!p);
3539 resp->rqstp->rq_vec[v].iov_base = p;
3540 resp->rqstp->rq_vec[v].iov_len = thislen;
3541 v++;
3542 len -= thislen;
3543
3544 while (len) {
6ff9897d 3545 thislen = min_t(long, len, PAGE_SIZE);
b0420980
BF		 3546 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3547 WARN_ON_ONCE(!p);
3548 resp->rqstp->rq_vec[v].iov_base = p;
6ff9897d 3549 resp->rqstp->rq_vec[v].iov_len = thislen;
1da177e4 3550 v++;
6ff9897d 3551 len -= thislen;
1da177e4
LT		 3552 }
3553 read->rd_vlen = v;
3554
ac503e4a 3555 len = maxcount;
87c5942e 3556 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
83a63072
TM		 3557 resp->rqstp->rq_vec, read->rd_vlen, &maxcount,
3558 &eof);
87c5942e 3559 read->rd_length = maxcount;
dc97618d 3560 if (nfserr)
1da177e4 3561 return nfserr;
b0420980 3562 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
dc97618d 3563
dc97618d
BF		 3564 tmp = htonl(eof);
3565 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3566 tmp = htonl(maxcount);
3567 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3568
b0420980
BF		 3569 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3570 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3571 &zzz, pad);
1da177e4 3572 return 0;
dc97618d
BF		 3573
3574}
3575
3576static __be32
3577nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3578 struct nfsd4_read *read)
3579{
3580 unsigned long maxcount;
3581 struct xdr_stream *xdr = &resp->xdr;
5c4583b2 3582 struct file *file;
dc97618d 3583 int starting_len = xdr->buf->len;
dc97618d 3584 __be32 *p;
dc97618d 3585
5c4583b2
JL		 3586 if (nfserr)
3587 return nfserr;
3588 file = read->rd_nf->nf_file;
3589
dc97618d
BF		 3590 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3591 if (!p) {
779fb0f3 3592 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
bac966d6 3593 return nfserr_resource;
dc97618d 3594 }
68e8bb03
CH		 3595 if (resp->xdr.buf->page_len &&
3596 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
b0420980 3597 WARN_ON_ONCE(1);
bac966d6 3598 return nfserr_resource;
dc97618d 3599 }
dc97618d
BF		 3600 xdr_commit_encode(xdr);
3601
3602 maxcount = svc_max_payload(resp->rqstp);
68e8bb03
CH		 3603 maxcount = min_t(unsigned long, maxcount,
3604 (xdr->buf->buflen - xdr->buf->len));
3c7aa15d 3605 maxcount = min_t(unsigned long, maxcount, read->rd_length);
dc97618d 3606
68e8bb03
CH		 3607 if (file->f_op->splice_read &&
3608 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
96bcad50 3609 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
dc97618d 3610 else
96bcad50 3611 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
dc97618d 3612
96bcad50 3613 if (nfserr)
dc97618d 3614 xdr_truncate_encode(xdr, starting_len);
96bcad50 3615
96bcad50 3616 return nfserr;
1da177e4
LT		 3617}
3618
b37ad28b
AV		 3619static __be32
3620nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3621{
3622 int maxcount;
476a7b1f
BF		 3623 __be32 wire_count;
3624 int zero = 0;
ddd1ea56 3625 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3626 int length_offset = xdr->buf->len;
bc749ca4 3627 __be32 *p;
1da177e4 3628
2825a7f9
BF		 3629 p = xdr_reserve_space(xdr, 4);
3630 if (!p)
3631 return nfserr_resource;
1da177e4 3632 maxcount = PAGE_SIZE;
d0a381dd 3633
476a7b1f
BF		 3634 p = xdr_reserve_space(xdr, maxcount);
3635 if (!p)
4e21ac4b 3636 return nfserr_resource;
1da177e4 3637 /*
fd4a0edf
MS		 3638 * XXX: By default, vfs_readlink() will truncate symlinks if they
3639 * would overflow the buffer. Is this kosher in NFSv4? If not, one
3640 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
3641 * that truncation occurred, and return NFS4ERR_RESOURCE.
1da177e4 3642 */
476a7b1f
BF		 3643 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3644 (char *)p, &maxcount);
1da177e4 3645 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3646 nfserr = nfserr_inval;
3647 if (nfserr) {
1fcea5b2 3648 xdr_truncate_encode(xdr, length_offset);
1da177e4 3649 return nfserr;
d3f627c8 3650 }
1da177e4 3651
476a7b1f
BF		 3652 wire_count = htonl(maxcount);
3653 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
69bbd9c7 3654 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
476a7b1f
BF		 3655 if (maxcount & 3)
3656 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3657 &zero, 4 - (maxcount&3));
1da177e4
LT		 3658 return 0;
3659}
3660
b37ad28b
AV		 3661static __be32
3662nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3663{
3664 int maxcount;
561f0ed4 3665 int bytes_left;
1da177e4 3666 loff_t offset;
561f0ed4 3667 __be64 wire_offset;
ddd1ea56 3668 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3669 int starting_len = xdr->buf->len;
bc749ca4 3670 __be32 *p;
1da177e4 3671
d0a381dd
BF		 3672 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3673 if (!p)
3674 return nfserr_resource;
1da177e4
LT		 3675
3676 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 3677 *p++ = cpu_to_be32(0);
3678 *p++ = cpu_to_be32(0);
4aea24b2
BF		 3679 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3680 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3681
3682 /*
561f0ed4
BF		 3683 * Number of bytes left for directory entries allowing for the
3684 * final 8 bytes of the readdir and a following failed op:
3685 */
3686 bytes_left = xdr->buf->buflen - xdr->buf->len
3687 - COMPOUND_ERR_SLACK_SPACE - 8;
3688 if (bytes_left < 0) {
3689 nfserr = nfserr_resource;
3690 goto err_no_verf;
3691 }
9c2ece6e
SM		 3692 maxcount = svc_max_payload(resp->rqstp);
3693 maxcount = min_t(u32, readdir->rd_maxcount, maxcount);
561f0ed4
BF		 3694 /*
3695 * Note the rfc defines rd_maxcount as the size of the
3696 * READDIR4resok structure, which includes the verifier above
3697 * and the 8 bytes encoded at the end of this function:
1da177e4 3698 */
561f0ed4
BF		 3699 if (maxcount < 16) {
3700 nfserr = nfserr_toosmall;
1da177e4
LT		 3701 goto err_no_verf;
3702 }
561f0ed4 3703 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3704
aee37764
BF		 3705 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3706 if (!readdir->rd_dircount)
9c2ece6e 3707 readdir->rd_dircount = svc_max_payload(resp->rqstp);
aee37764 3708
561f0ed4
BF		 3709 readdir->xdr = xdr;
3710 readdir->rd_maxcount = maxcount;
1da177e4 3711 readdir->common.err = 0;
561f0ed4 3712 readdir->cookie_offset = 0;
1da177e4
LT		 3713
3714 offset = readdir->rd_cookie;
3715 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3716 &offset,
3717 &readdir->common, nfsd4_encode_dirent);
3718 if (nfserr == nfs_ok &&
3719 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3720 xdr->buf->len == starting_len + 8) {
3721 /* nothing encoded; which limit did we hit?: */
3722 if (maxcount - 16 < bytes_left)
3723 /* It was the fault of rd_maxcount: */
3724 nfserr = nfserr_toosmall;
3725 else
3726 /* We ran out of buffer space: */
3727 nfserr = nfserr_resource;
3728 }
1da177e4
LT		 3729 if (nfserr)
3730 goto err_no_verf;
3731
561f0ed4
BF		 3732 if (readdir->cookie_offset) {
3733 wire_offset = cpu_to_be64(offset);
3734 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3735 &wire_offset, 8);
3736 }
1da177e4 3737
561f0ed4
BF		 3738 p = xdr_reserve_space(xdr, 8);
3739 if (!p) {
3740 WARN_ON_ONCE(1);
3741 goto err_no_verf;
3742 }
1da177e4
LT		 3743 *p++ = 0; /* no more entries */
3744 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3745
3746 return 0;
3747err_no_verf:
1fcea5b2 3748 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3749 return nfserr;
3750}
3751
695e12f8 3752static __be32
b37ad28b 3753nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3754{
d0a381dd 3755 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3756 __be32 *p;
1da177e4 3757
bac966d6
BF		 3758 p = xdr_reserve_space(xdr, 20);
3759 if (!p)
3760 return nfserr_resource;
3761 p = encode_cinfo(p, &remove->rm_cinfo);
3762 return 0;
1da177e4
LT		 3763}
3764
695e12f8 3765static __be32
b37ad28b 3766nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3767{
d0a381dd 3768 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3769 __be32 *p;
1da177e4 3770
bac966d6
BF		 3771 p = xdr_reserve_space(xdr, 40);
3772 if (!p)
3773 return nfserr_resource;
3774 p = encode_cinfo(p, &rename->rn_sinfo);
3775 p = encode_cinfo(p, &rename->rn_tinfo);
3776 return 0;
1da177e4
LT		 3777}
3778
695e12f8 3779static __be32
bac966d6 3780nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
dcb488a3 3781{
676e4ebd 3782 u32 i, nflavs, supported;
4796f457
BF		 3783 struct exp_flavor_info *flavs;
3784 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3785 __be32 *p, *flavorsp;
3786 static bool report = true;
dcb488a3 3787
4796f457
BF		 3788 if (exp->ex_nflavors) {
3789 flavs = exp->ex_flavors;
3790 nflavs = exp->ex_nflavors;
3791 } else { /* Handling of some defaults in absence of real secinfo: */
3792 flavs = def_flavs;
3793 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3794 nflavs = 2;
3795 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3796 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3797 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3798 nflavs = 1;
3799 flavs[0].pseudoflavor
3800 = svcauth_gss_flavor(exp->ex_client);
3801 } else {
3802 nflavs = 1;
3803 flavs[0].pseudoflavor
3804 = exp->ex_client->flavour->flavour;
3805 }
3806 }
3807
676e4ebd 3808 supported = 0;
d0a381dd
BF		 3809 p = xdr_reserve_space(xdr, 4);
3810 if (!p)
bac966d6 3811 return nfserr_resource;
676e4ebd 3812 flavorsp = p++; /* to be backfilled later */
676e4ebd 3813
4796f457 3814 for (i = 0; i < nflavs; i++) {
676e4ebd 3815 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3816 struct rpcsec_gss_info info;
dcb488a3 3817
676e4ebd
CL		 3818 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3819 supported++;
d0a381dd
BF		 3820 p = xdr_reserve_space(xdr, 4 + 4 +
3821 XDR_LEN(info.oid.len) + 4 + 4);
3822 if (!p)
bac966d6 3823 return nfserr_resource;
c373b0a4 3824 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 3825 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 3826 *p++ = cpu_to_be32(info.qop);
3827 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 3828 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3829 supported++;
d0a381dd
BF		 3830 p = xdr_reserve_space(xdr, 4);
3831 if (!p)
bac966d6 3832 return nfserr_resource;
c373b0a4 3833 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 3834 } else {
3835 if (report)
3836 pr_warn("NFS: SECINFO: security flavor %u "
3837 "is not supported\n", pf);
dcb488a3
AA		 3838 }
3839 }
a77c806f 3840
676e4ebd
CL		 3841 if (nflavs != supported)
3842 report = false;
3843 *flavorsp = htonl(supported);
bac966d6 3844 return 0;
dcb488a3
AA		 3845}
3846
22b6dee8
MJ		 3847static __be32
3848nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3849 struct nfsd4_secinfo *secinfo)
3850{
d0a381dd
BF		 3851 struct xdr_stream *xdr = &resp->xdr;
3852
bac966d6 3853 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
22b6dee8
MJ		 3854}
3855
3856static __be32
3857nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3858 struct nfsd4_secinfo_no_name *secinfo)
3859{
d0a381dd
BF		 3860 struct xdr_stream *xdr = &resp->xdr;
3861
bac966d6 3862 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
22b6dee8
MJ		 3863}
3864
1da177e4
LT		 3865/*
3866 * The SETATTR encode routine is special -- it always encodes a bitmap,
3867 * regardless of the error status.
3868 */
695e12f8 3869static __be32
b37ad28b 3870nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3871{
d0a381dd 3872 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3873 __be32 *p;
1da177e4 3874
d0a381dd
BF		 3875 p = xdr_reserve_space(xdr, 16);
3876 if (!p)
3877 return nfserr_resource;
1da177e4 3878 if (nfserr) {
c373b0a4
BF		 3879 *p++ = cpu_to_be32(3);
3880 *p++ = cpu_to_be32(0);
3881 *p++ = cpu_to_be32(0);
3882 *p++ = cpu_to_be32(0);
1da177e4
LT		 3883 }
3884 else {
c373b0a4
BF		 3885 *p++ = cpu_to_be32(3);
3886 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3887 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3888 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 3889 }
695e12f8 3890 return nfserr;
1da177e4
LT		 3891}
3892
695e12f8 3893static __be32
b37ad28b 3894nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3895{
d0a381dd 3896 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3897 __be32 *p;
1da177e4
LT		 3898
3899 if (!nfserr) {
d0a381dd
BF		 3900 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3901 if (!p)
3902 return nfserr_resource;
0c0c267b
BF		 3903 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3904 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3905 NFS4_VERIFIER_SIZE);
1da177e4
LT		 3906 }
3907 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3908 p = xdr_reserve_space(xdr, 8);
3909 if (!p)
3910 return nfserr_resource;
c373b0a4
BF		 3911 *p++ = cpu_to_be32(0);
3912 *p++ = cpu_to_be32(0);
1da177e4 3913 }
695e12f8 3914 return nfserr;
1da177e4
LT		 3915}
3916
695e12f8 3917static __be32
b37ad28b 3918nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3919{
d0a381dd 3920 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3921 __be32 *p;
1da177e4 3922
bac966d6
BF		 3923 p = xdr_reserve_space(xdr, 16);
3924 if (!p)
3925 return nfserr_resource;
3926 *p++ = cpu_to_be32(write->wr_bytes_written);
3927 *p++ = cpu_to_be32(write->wr_how_written);
3928 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3929 NFS4_VERIFIER_SIZE);
3930 return 0;
1da177e4
LT		 3931}
3932
2db134eb 3933static __be32
57b7b43b 3934nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3935 struct nfsd4_exchange_id *exid)
3936{
d0a381dd 3937 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3938 __be32 *p;
0733d213
AA		 3939 char *major_id;
3940 char *server_scope;
3941 int major_id_sz;
3942 int server_scope_sz;
3943 uint64_t minor_id = 0;
3944
0733d213
AA		 3945 major_id = utsname()->nodename;
3946 major_id_sz = strlen(major_id);
3947 server_scope = utsname()->nodename;
3948 server_scope_sz = strlen(server_scope);
3949
d0a381dd 3950 p = xdr_reserve_space(xdr,
0733d213
AA		 3951 8 /* eir_clientid */ +
3952 4 /* eir_sequenceid */ +
3953 4 /* eir_flags */ +
a8bb84bc 3954 4 /* spr_how */);
d0a381dd
BF		 3955 if (!p)
3956 return nfserr_resource;
0733d213 3957
0c0c267b 3958 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 3959 *p++ = cpu_to_be32(exid->seqid);
3960 *p++ = cpu_to_be32(exid->flags);
0733d213 3961
c373b0a4 3962 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 3963
57266a6e
BF		 3964 switch (exid->spa_how) {
3965 case SP4_NONE:
3966 break;
3967 case SP4_MACH_CRED:
3968 /* spo_must_enforce bitmap: */
bac966d6 3969 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 3970 exid->spo_must_enforce[0],
3971 exid->spo_must_enforce[1],
3972 exid->spo_must_enforce[2]);
bac966d6
BF		 3973 if (nfserr)
3974 return nfserr;
ed941643 3975 /* spo_must_allow bitmap: */
bac966d6 3976 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 3977 exid->spo_must_allow[0],
3978 exid->spo_must_allow[1],
3979 exid->spo_must_allow[2]);
bac966d6
BF		 3980 if (nfserr)
3981 return nfserr;
57266a6e
BF		 3982 break;
3983 default:
3984 WARN_ON_ONCE(1);
3985 }
0733d213 3986
d0a381dd 3987 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3988 8 /* so_minor_id */ +
3989 4 /* so_major_id.len */ +
3990 (XDR_QUADLEN(major_id_sz) * 4) +
3991 4 /* eir_server_scope.len */ +
3992 (XDR_QUADLEN(server_scope_sz) * 4) +
3993 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3994 if (!p)
3995 return nfserr_resource;
a8bb84bc 3996
0733d213 3997 /* The server_owner struct */
b64c7f3b 3998 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 3999 /* major id */
0c0c267b 4000 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 4001
4002 /* Server scope */
0c0c267b 4003 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 4004
4005 /* Implementation id */
c373b0a4 4006 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 4007 return 0;
2db134eb
AA		 4008}
4009
4010static __be32
57b7b43b 4011nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4012 struct nfsd4_create_session *sess)
4013{
d0a381dd 4014 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4015 __be32 *p;
ec6b5d7b 4016
d0a381dd
BF		 4017 p = xdr_reserve_space(xdr, 24);
4018 if (!p)
4019 return nfserr_resource;
0c0c267b
BF		 4020 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4021 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4022 *p++ = cpu_to_be32(sess->seqid);
4023 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 4024
d0a381dd
BF		 4025 p = xdr_reserve_space(xdr, 28);
4026 if (!p)
4027 return nfserr_resource;
c373b0a4
BF		 4028 *p++ = cpu_to_be32(0); /* headerpadsz */
4029 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4030 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4031 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4032 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4033 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4034 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4035
4036 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 4037 p = xdr_reserve_space(xdr, 4);
4038 if (!p)
4039 return nfserr_resource;
c373b0a4 4040 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 4041 }
4042
d0a381dd
BF		 4043 p = xdr_reserve_space(xdr, 28);
4044 if (!p)
4045 return nfserr_resource;
c373b0a4
BF		 4046 *p++ = cpu_to_be32(0); /* headerpadsz */
4047 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4048 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4049 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4050 *p++ = cpu_to_be32(sess->back_channel.maxops);
4051 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4052 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4053
4054 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 4055 p = xdr_reserve_space(xdr, 4);
4056 if (!p)
4057 return nfserr_resource;
c373b0a4 4058 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 4059 }
4060 return 0;
2db134eb
AA		 4061}
4062
c47d832b 4063static __be32
57b7b43b 4064nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4065 struct nfsd4_sequence *seq)
4066{
d0a381dd 4067 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4068 __be32 *p;
b85d4c01 4069
d0a381dd
BF		 4070 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4071 if (!p)
4072 return nfserr_resource;
0c0c267b
BF		 4073 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4074 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4075 *p++ = cpu_to_be32(seq->seqid);
4076 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 4077 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 4078 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4079 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4080 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 4081
f5236013 4082 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 4083 return 0;
2db134eb
AA		 4084}
4085
2355c596 4086static __be32
57b7b43b 4087nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 4088 struct nfsd4_test_stateid *test_stateid)
4089{
d0a381dd 4090 struct xdr_stream *xdr = &resp->xdr;
03cfb420 4091 struct nfsd4_test_stateid_id *stateid, *next;
17456804 4092 __be32 *p;
17456804 4093
d0a381dd
BF		 4094 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4095 if (!p)
4096 return nfserr_resource;
17456804 4097 *p++ = htonl(test_stateid->ts_num_ids);
17456804 4098
03cfb420 4099 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 4100 *p++ = stateid->ts_id_status;
17456804 4101 }
17456804 4102
bac966d6 4103 return 0;
17456804
BS		 4104}
4105
9cf514cc
CH		 4106#ifdef CONFIG_NFSD_PNFS
4107static __be32
4108nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4109 struct nfsd4_getdeviceinfo *gdev)
4110{
4111 struct xdr_stream *xdr = &resp->xdr;
f961e3f2 4112 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4113 u32 starting_len = xdr->buf->len, needed_len;
4114 __be32 *p;
4115
9cf514cc
CH		 4116 p = xdr_reserve_space(xdr, 4);
4117 if (!p)
bac966d6 4118 return nfserr_resource;
9cf514cc
CH		 4119
4120 *p++ = cpu_to_be32(gdev->gd_layout_type);
4121
4122 /* If maxcount is 0 then just update notifications */
4123 if (gdev->gd_maxcount != 0) {
f961e3f2 4124 ops = nfsd4_layout_ops[gdev->gd_layout_type];
9cf514cc
CH		 4125 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4126 if (nfserr) {
4127 /*
4128 * We don't bother to burden the layout drivers with
4129 * enforcing gd_maxcount, just tell the client to
4130 * come back with a bigger buffer if it's not enough.
4131 */
4132 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4133 goto toosmall;
bac966d6 4134 return nfserr;
9cf514cc
CH		 4135 }
4136 }
4137
9cf514cc
CH		 4138 if (gdev->gd_notify_types) {
4139 p = xdr_reserve_space(xdr, 4 + 4);
4140 if (!p)
bac966d6 4141 return nfserr_resource;
9cf514cc
CH		 4142 *p++ = cpu_to_be32(1); /* bitmap length */
4143 *p++ = cpu_to_be32(gdev->gd_notify_types);
4144 } else {
4145 p = xdr_reserve_space(xdr, 4);
4146 if (!p)
bac966d6 4147 return nfserr_resource;
9cf514cc
CH		 4148 *p++ = 0;
4149 }
4150
bac966d6 4151 return 0;
9cf514cc
CH		 4152toosmall:
4153 dprintk("%s: maxcount too small\n", __func__);
4154 needed_len = xdr->buf->len + 4 /* notifications */;
4155 xdr_truncate_encode(xdr, starting_len);
4156 p = xdr_reserve_space(xdr, 4);
bac966d6
BF		 4157 if (!p)
4158 return nfserr_resource;
4159 *p++ = cpu_to_be32(needed_len);
4160 return nfserr_toosmall;
9cf514cc
CH		 4161}
4162
4163static __be32
4164nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4165 struct nfsd4_layoutget *lgp)
4166{
4167 struct xdr_stream *xdr = &resp->xdr;
f961e3f2 4168 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4169 __be32 *p;
4170
9cf514cc
CH		 4171 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4172 if (!p)
bac966d6 4173 return nfserr_resource;
9cf514cc
CH		 4174
4175 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4176 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4177 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4178 sizeof(stateid_opaque_t));
4179
4180 *p++ = cpu_to_be32(1); /* we always return a single layout */
4181 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4182 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4183 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4184 *p++ = cpu_to_be32(lgp->lg_layout_type);
4185
f961e3f2 4186 ops = nfsd4_layout_ops[lgp->lg_layout_type];
bac966d6 4187 return ops->encode_layoutget(xdr, lgp);
9cf514cc
CH		 4188}
4189
4190static __be32
4191nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4192 struct nfsd4_layoutcommit *lcp)
4193{
4194 struct xdr_stream *xdr = &resp->xdr;
4195 __be32 *p;
4196
9cf514cc
CH		 4197 p = xdr_reserve_space(xdr, 4);
4198 if (!p)
4199 return nfserr_resource;
4200 *p++ = cpu_to_be32(lcp->lc_size_chg);
4201 if (lcp->lc_size_chg) {
4202 p = xdr_reserve_space(xdr, 8);
4203 if (!p)
4204 return nfserr_resource;
4205 p = xdr_encode_hyper(p, lcp->lc_newsize);
4206 }
4207
bac966d6 4208 return 0;
9cf514cc
CH		 4209}
4210
4211static __be32
4212nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4213 struct nfsd4_layoutreturn *lrp)
4214{
4215 struct xdr_stream *xdr = &resp->xdr;
4216 __be32 *p;
4217
9cf514cc
CH		 4218 p = xdr_reserve_space(xdr, 4);
4219 if (!p)
4220 return nfserr_resource;
4221 *p++ = cpu_to_be32(lrp->lrs_present);
4222 if (lrp->lrs_present)
376675da 4223 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
bac966d6 4224 return 0;
9cf514cc
CH		 4225}
4226#endif /* CONFIG_NFSD_PNFS */
4227
29ae7f9d 4228static __be32
e0639dc5
OK		 4229nfsd42_encode_write_res(struct nfsd4_compoundres *resp,
4230 struct nfsd42_write_res *write, bool sync)
29ae7f9d
AS		 4231{
4232 __be32 *p;
e0639dc5
OK		 4233 p = xdr_reserve_space(&resp->xdr, 4);
4234 if (!p)
4235 return nfserr_resource;
29ae7f9d 4236
e0639dc5
OK		 4237 if (sync)
4238 *p++ = cpu_to_be32(0);
4239 else {
4240 __be32 nfserr;
4241 *p++ = cpu_to_be32(1);
4242 nfserr = nfsd4_encode_stateid(&resp->xdr, &write->cb_stateid);
4243 if (nfserr)
4244 return nfserr;
4245 }
4246 p = xdr_reserve_space(&resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE);
29ae7f9d
AS		 4247 if (!p)
4248 return nfserr_resource;
4249
29ae7f9d
AS		 4250 p = xdr_encode_hyper(p, write->wr_bytes_written);
4251 *p++ = cpu_to_be32(write->wr_stable_how);
4252 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4253 NFS4_VERIFIER_SIZE);
4254 return nfs_ok;
4255}
4256
4257static __be32
4258nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4259 struct nfsd4_copy *copy)
4260{
4261 __be32 *p;
4262
e0639dc5
OK		 4263 nfserr = nfsd42_encode_write_res(resp, &copy->cp_res,
4264 copy->cp_synchronous);
bac966d6
BF		 4265 if (nfserr)
4266 return nfserr;
29ae7f9d 4267
bac966d6 4268 p = xdr_reserve_space(&resp->xdr, 4 + 4);
edcc8452 4269 *p++ = xdr_one; /* cr_consecutive */
bac966d6
BF		 4270 *p++ = cpu_to_be32(copy->cp_synchronous);
4271 return 0;
29ae7f9d
AS		 4272}
4273
6308bc98
OK		 4274static __be32
4275nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
4276 struct nfsd4_offload_status *os)
4277{
4278 struct xdr_stream *xdr = &resp->xdr;
4279 __be32 *p;
4280
4281 p = xdr_reserve_space(xdr, 8 + 4);
4282 if (!p)
4283 return nfserr_resource;
4284 p = xdr_encode_hyper(p, os->count);
4285 *p++ = cpu_to_be32(0);
4286
4287 return nfserr;
4288}
4289
24bab491
AS		 4290static __be32
4291nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4292 struct nfsd4_seek *seek)
4293{
4294 __be32 *p;
4295
24bab491
AS		 4296 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4297 *p++ = cpu_to_be32(seek->seek_eof);
4298 p = xdr_encode_hyper(p, seek->seek_pos);
4299
bac966d6 4300 return 0;
24bab491
AS		 4301}
4302
695e12f8
BH		 4303static __be32
4304nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4305{
4306 return nfserr;
4307}
4308
4309typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4310
2db134eb
AA		 4311/*
4312 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4313 * since we don't need to filter out obsolete ops as this is
4314 * done in the decoding phase.
4315 */
c1df609d 4316static const nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 4317 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4318 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4319 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4320 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4321 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4322 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4323 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4324 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4325 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4326 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4327 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4328 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4329 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4330 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4331 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4332 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 4333 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 4334 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4335 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4336 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4337 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4338 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4339 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4340 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4341 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4342 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4343 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4344 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4345 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4346 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4347 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4348 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4349 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4350 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4351 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4352 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4353 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 4354
4355 /* NFSv4.1 operations */
4356 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 4357 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 4358 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4359 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 4360 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4361 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb 4362 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc
CH		 4363#ifdef CONFIG_NFSD_PNFS
4364 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4365 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4366 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4367 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4368 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4369#else
2db134eb
AA		 4370 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4371 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4372 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4373 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4374 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc 4375#endif
22b6dee8 4376 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 4377 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4378 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 4379 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 4380 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4381 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4382 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
87a15a80
AS		 4383
4384 /* NFSv4.2 operations */
4385 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
29ae7f9d 4386 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
87a15a80
AS		 4387 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4388 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4389 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4390 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4391 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4392 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
6308bc98 4393 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status,
87a15a80 4394 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
24bab491 4395 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
87a15a80 4396 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
ffa0160a 4397 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 4398};
4399
496c262c 4400/*
a8095f7e
BF		 4401 * Calculate whether we still have space to encode repsize bytes.
4402 * There are two considerations:
4403 * - For NFS versions >=4.1, the size of the reply must stay within
4404 * session limits
4405 * - For all NFS versions, we must stay within limited preallocated
4406 * buffer space.
496c262c 4407 *
a8095f7e
BF		 4408 * This is called before the operation is processed, so can only provide
4409 * an upper estimate. For some nonidempotent operations (such as
4410 * getattr), it's not necessarily a problem if that estimate is wrong,
4411 * as we can fail it after processing without significant side effects.
496c262c 4412 */
a8095f7e 4413__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 4414{
67492c99 4415 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 4416 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 4417
47ee5298
BF		 4418 if (buf->len + respsize <= buf->buflen)
4419 return nfs_ok;
4420 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 4421 return nfserr_resource;
47ee5298
BF		 4422 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4423 WARN_ON_ONCE(1);
4424 return nfserr_rep_too_big_to_cache;
ea8d7720 4425 }
47ee5298 4426 return nfserr_rep_too_big;
496c262c
AA		 4427}
4428
1da177e4
LT		 4429void
4430nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4431{
082d4bd7 4432 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 4433 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 4434 struct svc_rqst *rqstp = resp->rqstp;
34b1744c 4435 const struct nfsd4_operation *opdesc = op->opdesc;
082d4bd7 4436 int post_err_offset;
07d1f802 4437 nfsd4_enc encoder;
bc749ca4 4438 __be32 *p;
1da177e4 4439
d0a381dd
BF		 4440 p = xdr_reserve_space(xdr, 8);
4441 if (!p) {
4442 WARN_ON_ONCE(1);
4443 return;
4444 }
c373b0a4 4445 *p++ = cpu_to_be32(op->opnum);
082d4bd7 4446 post_err_offset = xdr->buf->len;
1da177e4 4447
695e12f8
BH		 4448 if (op->opnum == OP_ILLEGAL)
4449 goto status;
b7571e4c
BF		 4450 if (op->status && opdesc &&
4451 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
4452 goto status;
695e12f8
BH		 4453 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4454 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 4455 encoder = nfsd4_enc_ops[op->opnum];
4456 op->status = encoder(resp, op->status, &op->u);
34b1744c
BF		 4457 if (opdesc && opdesc->op_release)
4458 opdesc->op_release(&op->u);
2825a7f9
BF		 4459 xdr_commit_encode(xdr);
4460
067e1ace 4461 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 4462 if (!op->status) {
4463 int space_needed = 0;
4464 if (!nfsd4_last_compound_op(rqstp))
4465 space_needed = COMPOUND_ERR_SLACK_SPACE;
4466 op->status = nfsd4_check_resp_size(resp, space_needed);
4467 }
c8f13d97
BF		 4468 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4469 struct nfsd4_slot *slot = resp->cstate.slot;
4470
4471 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4472 op->status = nfserr_rep_too_big_to_cache;
4473 else
4474 op->status = nfserr_rep_too_big;
4475 }
07d1f802
BF		 4476 if (op->status == nfserr_resource ||
4477 op->status == nfserr_rep_too_big ||
4478 op->status == nfserr_rep_too_big_to_cache) {
4479 /*
4480 * The operation may have already been encoded or
4481 * partially encoded. No op returns anything additional
4482 * in the case of one of these three errors, so we can
4483 * just truncate back to after the status. But it's a
4484 * bug if we had to do this on a non-idempotent op:
4485 */
4486 warn_on_nonidempotent_op(op);
082d4bd7 4487 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 4488 }
9411b1d4 4489 if (so) {
082d4bd7
BF		 4490 int len = xdr->buf->len - post_err_offset;
4491
9411b1d4 4492 so->so_replay.rp_status = op->status;
082d4bd7
BF		 4493 so->so_replay.rp_buflen = len;
4494 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4495 so->so_replay.rp_buf, len);
9411b1d4 4496 }
695e12f8 4497status:
082d4bd7
BF		 4498 /* Note that op->status is already in network byte order: */
4499 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 4500}
4501
4502/*
4503 * Encode the reply stored in the stateowner reply cache
4504 *
4505 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4506 * previously sent already encoded operation.
1da177e4
LT		 4507 */
4508void
d0a381dd 4509nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 4510{
bc749ca4 4511 __be32 *p;
1da177e4
LT		 4512 struct nfs4_replay *rp = op->replay;
4513
4514 BUG_ON(!rp);
4515
d0a381dd
BF		 4516 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4517 if (!p) {
4518 WARN_ON_ONCE(1);
4519 return;
4520 }
c373b0a4 4521 *p++ = cpu_to_be32(op->opnum);
1da177e4 4522 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 4523
0c0c267b 4524 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 4525}
4526
1da177e4 4527int
63f8de37 4528nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
1da177e4
LT		 4529{
4530 return xdr_ressize_check(rqstp, p);
4531}
4532
8537488b 4533void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
1da177e4 4534{
3e98abff
BF		 4535 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4536
1da177e4
LT		 4537 if (args->ops != args->iops) {
4538 kfree(args->ops);
4539 args->ops = args->iops;
4540 }
f99d49ad
JJ		 4541 kfree(args->tmpp);
4542 args->tmpp = NULL;
1da177e4 4543 while (args->to_free) {
d5e23383 4544 struct svcxdr_tmpbuf *tb = args->to_free;
1da177e4 4545 args->to_free = tb->next;
1da177e4
LT		 4546 kfree(tb);
4547 }
4548}
4549
4550int
026fec7e 4551nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
1da177e4 4552{
026fec7e
CH		 4553 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4554
e874f9f8
JL		 4555 if (rqstp->rq_arg.head[0].iov_len % 4) {
4556 /* client is nuts */
4557 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4558 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4559 return 0;
4560 }
1da177e4
LT		 4561 args->p = p;
4562 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4563 args->pagelist = rqstp->rq_arg.pages;
4564 args->pagelen = rqstp->rq_arg.page_len;
eae03e2a 4565 args->tail = false;
1da177e4
LT		 4566 args->tmpp = NULL;
4567 args->to_free = NULL;
4568 args->ops = args->iops;
4569 args->rqstp = rqstp;
4570
3e98abff 4571 return !nfsd4_decode_compound(args);
1da177e4
LT		 4572}
4573
4574int
63f8de37 4575nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
1da177e4
LT		 4576{
4577 /*
4578 * All that remains is to write the tag and operation count...
4579 */
63f8de37 4580 struct nfsd4_compoundres *resp = rqstp->rq_resp;
6ac90391
BF		 4581 struct xdr_buf *buf = resp->xdr.buf;
4582
4583 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4584 buf->tail[0].iov_len);
dd97fdde 4585
2825a7f9
BF		 4586 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4587
1da177e4
LT		 4588 p = resp->tagp;
4589 *p++ = htonl(resp->taglen);
4590 memcpy(p, resp->tag, resp->taglen);
4591 p += XDR_QUADLEN(resp->taglen);
4592 *p++ = htonl(resp->opcnt);
4593
b607664e 4594 nfsd4_sequence_done(resp);
1da177e4
LT		 4595 return 1;
4596}
4597
4598/*
4599 * Local variables:
4600 * c-basic-offset: 8
4601 * End:
4602 */
Linux 6.x block layer and io_uring tree(s)