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UBUNTU: [Config] arm64: snapdragon: DRM_MSM=m
[mirror_ubuntu-bionic-kernel.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"
2ca72e17 52
18032ca0
DQ		 53#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
54#include <linux/security.h>
55#endif
56
57
1da177e4
LT		 58#define NFSDDBG_FACILITY NFSDDBG_XDR
59
5cf23dbb 60const u32 nfsd_suppattrs[3][3] = {
916d2d84
BF		 61 {NFSD4_SUPPORTED_ATTRS_WORD0,
62 NFSD4_SUPPORTED_ATTRS_WORD1,
63 NFSD4_SUPPORTED_ATTRS_WORD2},
64
65 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
66 NFSD4_1_SUPPORTED_ATTRS_WORD1,
67 NFSD4_1_SUPPORTED_ATTRS_WORD2},
68
69 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
70 NFSD4_1_SUPPORTED_ATTRS_WORD1,
71 NFSD4_2_SUPPORTED_ATTRS_WORD2},
72};
73
42ca0993
BF		 74/*
75 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
76 * directory in order to indicate to the client that a filesystem boundary is present
77 * We use a fixed fsid for a referral
78 */
79#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
80#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
81
b37ad28b 82static __be32
a36b1725 83check_filename(char *str, int len)
1da177e4
LT		 84{
85 int i;
86
87 if (len == 0)
88 return nfserr_inval;
89 if (isdotent(str, len))
a36b1725 90 return nfserr_badname;
1da177e4
LT		 91 for (i = 0; i < len; i++)
92 if (str[i] == '/')
a36b1725 93 return nfserr_badname;
1da177e4
LT		 94 return 0;
95}
96
1da177e4 97#define DECODE_HEAD \
2ebbc012 98 __be32 *p; \
b37ad28b 99 __be32 status
1da177e4
LT		 100#define DECODE_TAIL \
101 status = 0; \
102out: \
103 return status; \
104xdr_error: \
817cb9d4
CL		 105 dprintk("NFSD: xdr error (%s:%d)\n", \
106 __FILE__, __LINE__); \
1da177e4
LT		 107 status = nfserr_bad_xdr; \
108 goto out
109
1da177e4
LT		 110#define READMEM(x,nbytes) do { \
111 x = (char *)p; \
112 p += XDR_QUADLEN(nbytes); \
113} while (0)
114#define SAVEMEM(x,nbytes) do { \
115 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
116 savemem(argp, p, nbytes) : \
117 (char *)p)) { \
817cb9d4
CL		 118 dprintk("NFSD: xdr error (%s:%d)\n", \
119 __FILE__, __LINE__); \
1da177e4
LT		 120 goto xdr_error; \
121 } \
122 p += XDR_QUADLEN(nbytes); \
123} while (0)
124#define COPYMEM(x,nbytes) do { \
125 memcpy((x), p, nbytes); \
126 p += XDR_QUADLEN(nbytes); \
127} while (0)
128
129/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
130#define READ_BUF(nbytes) do { \
131 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
132 p = argp->p; \
133 argp->p += XDR_QUADLEN(nbytes); \
134 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 135 dprintk("NFSD: xdr error (%s:%d)\n", \
136 __FILE__, __LINE__); \
1da177e4
LT		 137 goto xdr_error; \
138 } \
139} while (0)
140
590b7431
BF		 141static void next_decode_page(struct nfsd4_compoundargs *argp)
142{
590b7431 143 argp->p = page_address(argp->pagelist[0]);
365da4ad 144 argp->pagelist++;
590b7431 145 if (argp->pagelen < PAGE_SIZE) {
fc788f64 146 argp->end = argp->p + XDR_QUADLEN(argp->pagelen);
590b7431
BF		 147 argp->pagelen = 0;
148 } else {
149 argp->end = argp->p + (PAGE_SIZE>>2);
150 argp->pagelen -= PAGE_SIZE;
151 }
152}
153
ca2a05aa 154static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 155{
156 /* We want more bytes than seem to be available.
157 * Maybe we need a new page, maybe we have just run out
158 */
ca2a05aa 159 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 160 __be32 *p;
eae03e2a
CL		 161
162 if (argp->pagelen == 0) {
163 struct kvec *vec = &argp->rqstp->rq_arg.tail[0];
164
165 if (!argp->tail) {
166 argp->tail = true;
167 avail = vec->iov_len;
168 argp->p = vec->iov_base;
169 argp->end = vec->iov_base + avail;
170 }
171
172 if (avail < nbytes)
173 return NULL;
174
175 p = argp->p;
176 argp->p += XDR_QUADLEN(nbytes);
177 return p;
178 }
179
1da177e4
LT		 180 if (avail + argp->pagelen < nbytes)
181 return NULL;
182 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
183 return NULL;
184 /* ok, we can do it with the current plus the next page */
185 if (nbytes <= sizeof(argp->tmp))
186 p = argp->tmp;
187 else {
f99d49ad 188 kfree(argp->tmpp);
1da177e4
LT		 189 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
190 if (!p)
191 return NULL;
192
193 }
ca2a05aa
BF		 194 /*
195 * The following memcpy is safe because read_buf is always
196 * called with nbytes > avail, and the two cases above both
197 * guarantee p points to at least nbytes bytes.
198 */
1da177e4 199 memcpy(p, argp->p, avail);
590b7431 200 next_decode_page(argp);
1da177e4
LT		 201 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
202 argp->p += XDR_QUADLEN(nbytes - avail);
203 return p;
204}
205
60adfc50
AA		 206static int zero_clientid(clientid_t *clid)
207{
208 return (clid->cl_boot == 0) && (clid->cl_id == 0);
209}
210
2d8498db 211/**
d5e23383 212 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
ce043ac8
BF		 213 * @argp: NFSv4 compound argument structure
214 * @p: pointer to be freed (with kfree())
2d8498db
CH		 215 *
216 * Marks @p to be freed when processing the compound operation
217 * described in @argp finishes.
218 */
d5e23383
BF		 219static void *
220svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
1da177e4 221{
d5e23383 222 struct svcxdr_tmpbuf *tb;
1da177e4 223
d5e23383 224 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
1da177e4 225 if (!tb)
d5e23383 226 return NULL;
1da177e4
LT		 227 tb->next = argp->to_free;
228 argp->to_free = tb;
d5e23383 229 return tb->buf;
1da177e4
LT		 230}
231
29c353b3
BF		 232/*
233 * For xdr strings that need to be passed to other kernel api's
234 * as null-terminated strings.
235 *
236 * Note null-terminating in place usually isn't safe since the
237 * buffer might end on a page boundary.
238 */
239static char *
240svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
241{
d5e23383 242 char *p = svcxdr_tmpalloc(argp, len + 1);
29c353b3
BF		 243
244 if (!p)
245 return NULL;
246 memcpy(p, buf, len);
247 p[len] = '\0';
29c353b3 248 return p;
1da177e4
LT		 249}
250
2d8498db
CH		 251/**
252 * savemem - duplicate a chunk of memory for later processing
253 * @argp: NFSv4 compound argument structure to be freed with
254 * @p: pointer to be duplicated
255 * @nbytes: length to be duplicated
256 *
257 * Returns a pointer to a copy of @nbytes bytes of memory at @p
258 * that are preserved until processing of the NFSv4 compound
259 * operation described by @argp finishes.
260 */
2ebbc012 261static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 262{
d5e23383
BF		 263 void *ret;
264
265 ret = svcxdr_tmpalloc(argp, nbytes);
266 if (!ret)
1da177e4 267 return NULL;
d5e23383
BF		 268 memcpy(ret, p, nbytes);
269 return ret;
1da177e4
LT		 270}
271
4c94e13e
CH		 272/*
273 * We require the high 32 bits of 'seconds' to be 0, and
274 * we ignore all 32 bits of 'nseconds'.
275 */
276static __be32
277nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
278{
279 DECODE_HEAD;
280 u64 sec;
281
282 READ_BUF(12);
283 p = xdr_decode_hyper(p, &sec);
284 tv->tv_sec = sec;
285 tv->tv_nsec = be32_to_cpup(p++);
286 if (tv->tv_nsec >= (u32)1000000000)
287 return nfserr_inval;
288
289 DECODE_TAIL;
290}
291
b37ad28b 292static __be32
1da177e4
LT		 293nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
294{
295 u32 bmlen;
296 DECODE_HEAD;
297
298 bmval[0] = 0;
299 bmval[1] = 0;
7e705706 300 bmval[2] = 0;
1da177e4
LT		 301
302 READ_BUF(4);
06553991 303 bmlen = be32_to_cpup(p++);
1da177e4
LT		 304 if (bmlen > 1000)
305 goto xdr_error;
306
307 READ_BUF(bmlen << 2);
308 if (bmlen > 0)
06553991 309 bmval[0] = be32_to_cpup(p++);
1da177e4 310 if (bmlen > 1)
06553991 311 bmval[1] = be32_to_cpup(p++);
7e705706 312 if (bmlen > 2)
06553991 313 bmval[2] = be32_to_cpup(p++);
1da177e4
LT		 314
315 DECODE_TAIL;
316}
317
b37ad28b 318static __be32
3c8e0316 319nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0 320 struct iattr *iattr, struct nfs4_acl **acl,
47057abd 321 struct xdr_netobj *label, int *umask)
1da177e4
LT		 322{
323 int expected_len, len = 0;
324 u32 dummy32;
325 char *buf;
326
327 DECODE_HEAD;
328 iattr->ia_valid = 0;
329 if ((status = nfsd4_decode_bitmap(argp, bmval)))
330 return status;
331
e864c189
BF		 332 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
333 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
334 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
335 if (nfsd_attrs_supported(argp->minorversion, bmval))
336 return nfserr_inval;
337 return nfserr_attrnotsupp;
338 }
339
1da177e4 340 READ_BUF(4);
06553991 341 expected_len = be32_to_cpup(p++);
1da177e4
LT		 342
343 if (bmval[0] & FATTR4_WORD0_SIZE) {
344 READ_BUF(8);
345 len += 8;
542d1ab3 346 p = xdr_decode_hyper(p, &iattr->ia_size);
1da177e4
LT		 347 iattr->ia_valid |= ATTR_SIZE;
348 }
349 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 350 u32 nace;
28e05dd8 351 struct nfs4_ace *ace;
1da177e4
LT		 352
353 READ_BUF(4); len += 4;
06553991 354 nace = be32_to_cpup(p++);
1da177e4 355
28e05dd8 356 if (nace > NFS4_ACL_MAX)
798df338 357 return nfserr_fbig;
28e05dd8 358
d5e23383 359 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
eba1c99c
KM		 360 if (*acl == NULL)
361 return nfserr_jukebox;
362
28e05dd8
BF		 363 (*acl)->naces = nace;
364 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 365 READ_BUF(16); len += 16;
06553991
BF		 366 ace->type = be32_to_cpup(p++);
367 ace->flag = be32_to_cpup(p++);
368 ace->access_mask = be32_to_cpup(p++);
369 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 370 READ_BUF(dummy32);
371 len += XDR_QUADLEN(dummy32) << 2;
372 READMEM(buf, dummy32);
28e05dd8 373 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 374 status = nfs_ok;
28e05dd8 375 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 376 ;
28e05dd8 377 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 378 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 379 buf, dummy32, &ace->who_gid);
1da177e4 380 else
3c726023 381 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 382 buf, dummy32, &ace->who_uid);
3c726023
BF		 383 if (status)
384 return status;
1da177e4
LT		 385 }
386 } else
387 *acl = NULL;
388 if (bmval[1] & FATTR4_WORD1_MODE) {
389 READ_BUF(4);
390 len += 4;
06553991 391 iattr->ia_mode = be32_to_cpup(p++);
1da177e4
LT		 392 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
393 iattr->ia_valid |= ATTR_MODE;
394 }
395 if (bmval[1] & FATTR4_WORD1_OWNER) {
396 READ_BUF(4);
397 len += 4;
06553991 398 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 399 READ_BUF(dummy32);
400 len += (XDR_QUADLEN(dummy32) << 2);
401 READMEM(buf, dummy32);
47c85291
N		 402 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
403 return status;
1da177e4
LT		 404 iattr->ia_valid |= ATTR_UID;
405 }
406 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
407 READ_BUF(4);
408 len += 4;
06553991 409 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 410 READ_BUF(dummy32);
411 len += (XDR_QUADLEN(dummy32) << 2);
412 READMEM(buf, dummy32);
47c85291
N		 413 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
414 return status;
1da177e4
LT		 415 iattr->ia_valid |= ATTR_GID;
416 }
417 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
418 READ_BUF(4);
419 len += 4;
06553991 420 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 421 switch (dummy32) {
422 case NFS4_SET_TO_CLIENT_TIME:
1da177e4 423 len += 12;
4c94e13e
CH		 424 status = nfsd4_decode_time(argp, &iattr->ia_atime);
425 if (status)
426 return status;
1da177e4
LT		 427 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
428 break;
429 case NFS4_SET_TO_SERVER_TIME:
430 iattr->ia_valid |= ATTR_ATIME;
431 break;
432 default:
433 goto xdr_error;
434 }
435 }
1da177e4
LT		 436 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
437 READ_BUF(4);
438 len += 4;
06553991 439 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 440 switch (dummy32) {
441 case NFS4_SET_TO_CLIENT_TIME:
1da177e4 442 len += 12;
4c94e13e
CH		 443 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
444 if (status)
445 return status;
1da177e4
LT		 446 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
447 break;
448 case NFS4_SET_TO_SERVER_TIME:
449 iattr->ia_valid |= ATTR_MTIME;
450 break;
451 default:
452 goto xdr_error;
453 }
454 }
18032ca0
DQ		 455
456 label->len = 0;
457#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
458 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
459 READ_BUF(4);
460 len += 4;
06553991 461 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
18032ca0
DQ		 462 READ_BUF(4);
463 len += 4;
06553991 464 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
18032ca0
DQ		 465 READ_BUF(4);
466 len += 4;
06553991 467 dummy32 = be32_to_cpup(p++);
18032ca0 468 READ_BUF(dummy32);
1ec8c0c4 469 if (dummy32 > NFS4_MAXLABELLEN)
18032ca0
DQ		 470 return nfserr_badlabel;
471 len += (XDR_QUADLEN(dummy32) << 2);
472 READMEM(buf, dummy32);
29c353b3
BF		 473 label->len = dummy32;
474 label->data = svcxdr_dupstr(argp, buf, dummy32);
18032ca0
DQ		 475 if (!label->data)
476 return nfserr_jukebox;
18032ca0
DQ		 477 }
478#endif
47057abd
AG		 479 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
480 if (!umask)
481 goto xdr_error;
482 READ_BUF(8);
483 len += 8;
484 dummy32 = be32_to_cpup(p++);
485 iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO);
486 dummy32 = be32_to_cpup(p++);
487 *umask = dummy32 & S_IRWXUGO;
488 iattr->ia_valid |= ATTR_MODE;
489 }
e864c189 490 if (len != expected_len)
1da177e4
LT		 491 goto xdr_error;
492
493 DECODE_TAIL;
1da177e4
LT		 494}
495
e31a1b66
BH		 496static __be32
497nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
498{
499 DECODE_HEAD;
500
501 READ_BUF(sizeof(stateid_t));
06553991 502 sid->si_generation = be32_to_cpup(p++);
e31a1b66
BH		 503 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
504
505 DECODE_TAIL;
506}
507
b37ad28b 508static __be32
1da177e4
LT		 509nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
510{
511 DECODE_HEAD;
512
513 READ_BUF(4);
06553991 514 access->ac_req_access = be32_to_cpup(p++);
1da177e4
LT		 515
516 DECODE_TAIL;
517}
518
acb2887e
BF		 519static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
520{
521 DECODE_HEAD;
12fc3e92 522 u32 dummy, uid, gid;
acb2887e
BF		 523 char *machine_name;
524 int i;
525 int nr_secflavs;
526
527 /* callback_sec_params4 */
528 READ_BUF(4);
06553991 529 nr_secflavs = be32_to_cpup(p++);
57569a70
BF		 530 if (nr_secflavs)
531 cbs->flavor = (u32)(-1);
532 else
533 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
534 cbs->flavor = 0;
acb2887e
BF		 535 for (i = 0; i < nr_secflavs; ++i) {
536 READ_BUF(4);
06553991 537 dummy = be32_to_cpup(p++);
acb2887e
BF		 538 switch (dummy) {
539 case RPC_AUTH_NULL:
540 /* Nothing to read */
12fc3e92
BF		 541 if (cbs->flavor == (u32)(-1))
542 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 543 break;
544 case RPC_AUTH_UNIX:
545 READ_BUF(8);
546 /* stamp */
06553991 547 dummy = be32_to_cpup(p++);
acb2887e
BF		 548
549 /* machine name */
06553991 550 dummy = be32_to_cpup(p++);
acb2887e
BF		 551 READ_BUF(dummy);
552 SAVEMEM(machine_name, dummy);
553
554 /* uid, gid */
555 READ_BUF(8);
06553991
BF		 556 uid = be32_to_cpup(p++);
557 gid = be32_to_cpup(p++);
acb2887e
BF		 558
559 /* more gids */
560 READ_BUF(4);
06553991 561 dummy = be32_to_cpup(p++);
acb2887e 562 READ_BUF(dummy * 4);
12fc3e92 563 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 564 kuid_t kuid = make_kuid(&init_user_ns, uid);
565 kgid_t kgid = make_kgid(&init_user_ns, gid);
566 if (uid_valid(kuid) && gid_valid(kgid)) {
567 cbs->uid = kuid;
568 cbs->gid = kgid;
569 cbs->flavor = RPC_AUTH_UNIX;
570 } else {
571 dprintk("RPC_AUTH_UNIX with invalid"
572 "uid or gid ignoring!\n");
573 }
12fc3e92 574 }
acb2887e
BF		 575 break;
576 case RPC_AUTH_GSS:
577 dprintk("RPC_AUTH_GSS callback secflavor "
578 "not supported!\n");
579 READ_BUF(8);
580 /* gcbp_service */
06553991 581 dummy = be32_to_cpup(p++);
acb2887e 582 /* gcbp_handle_from_server */
06553991 583 dummy = be32_to_cpup(p++);
acb2887e
BF		 584 READ_BUF(dummy);
585 p += XDR_QUADLEN(dummy);
586 /* gcbp_handle_from_client */
587 READ_BUF(4);
06553991 588 dummy = be32_to_cpup(p++);
acb2887e
BF		 589 READ_BUF(dummy);
590 break;
591 default:
592 dprintk("Illegal callback secflavor\n");
593 return nfserr_inval;
594 }
595 }
596 DECODE_TAIL;
597}
598
cb73a9f4
BF		 599static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
600{
601 DECODE_HEAD;
602
603 READ_BUF(4);
06553991 604 bc->bc_cb_program = be32_to_cpup(p++);
cb73a9f4
BF		 605 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
606
607 DECODE_TAIL;
608}
609
1d1bc8f2
BF		 610static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
611{
612 DECODE_HEAD;
1d1bc8f2
BF		 613
614 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
615 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991 616 bcts->dir = be32_to_cpup(p++);
6ce2357f
BS		 617 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
618 * could help us figure out we should be using it. */
1d1bc8f2
BF		 619 DECODE_TAIL;
620}
621
b37ad28b 622static __be32
1da177e4
LT		 623nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
624{
625 DECODE_HEAD;
626
e31a1b66 627 READ_BUF(4);
06553991 628 close->cl_seqid = be32_to_cpup(p++);
e31a1b66 629 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 630
631 DECODE_TAIL;
632}
633
634
b37ad28b 635static __be32
1da177e4
LT		 636nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
637{
638 DECODE_HEAD;
639
640 READ_BUF(12);
542d1ab3 641 p = xdr_decode_hyper(p, &commit->co_offset);
06553991 642 commit->co_count = be32_to_cpup(p++);
1da177e4
LT		 643
644 DECODE_TAIL;
645}
646
b37ad28b 647static __be32
1da177e4
LT		 648nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
649{
650 DECODE_HEAD;
651
652 READ_BUF(4);
06553991 653 create->cr_type = be32_to_cpup(p++);
1da177e4
LT		 654 switch (create->cr_type) {
655 case NF4LNK:
656 READ_BUF(4);
7fb84306
BF		 657 create->cr_datalen = be32_to_cpup(p++);
658 READ_BUF(create->cr_datalen);
29c353b3 659 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
7fb84306 660 if (!create->cr_data)
76f47128 661 return nfserr_jukebox;
1da177e4
LT		 662 break;
663 case NF4BLK:
664 case NF4CHR:
665 READ_BUF(8);
06553991
BF		 666 create->cr_specdata1 = be32_to_cpup(p++);
667 create->cr_specdata2 = be32_to_cpup(p++);
1da177e4
LT		 668 break;
669 case NF4SOCK:
670 case NF4FIFO:
671 case NF4DIR:
672 default:
673 break;
674 }
675
676 READ_BUF(4);
06553991 677 create->cr_namelen = be32_to_cpup(p++);
1da177e4
LT		 678 READ_BUF(create->cr_namelen);
679 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 680 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 681 return status;
682
3c8e0316 683 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
47057abd 684 &create->cr_acl, &create->cr_label,
9d509800 685 &create->cr_umask);
c0d6fc8a 686 if (status)
1da177e4
LT		 687 goto out;
688
689 DECODE_TAIL;
690}
691
b37ad28b 692static inline __be32
1da177e4
LT		 693nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
694{
e31a1b66 695 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 696}
697
b37ad28b 698static inline __be32
1da177e4
LT		 699nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
700{
701 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
702}
703
b37ad28b 704static __be32
1da177e4
LT		 705nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
706{
707 DECODE_HEAD;
708
709 READ_BUF(4);
06553991 710 link->li_namelen = be32_to_cpup(p++);
1da177e4
LT		 711 READ_BUF(link->li_namelen);
712 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 713 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 714 return status;
715
716 DECODE_TAIL;
717}
718
b37ad28b 719static __be32
1da177e4
LT		 720nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
721{
722 DECODE_HEAD;
723
1da177e4
LT		 724 /*
725 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
726 */
727 READ_BUF(28);
06553991 728 lock->lk_type = be32_to_cpup(p++);
1da177e4
LT		 729 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
730 goto xdr_error;
06553991 731 lock->lk_reclaim = be32_to_cpup(p++);
542d1ab3
BF		 732 p = xdr_decode_hyper(p, &lock->lk_offset);
733 p = xdr_decode_hyper(p, &lock->lk_length);
06553991 734 lock->lk_is_new = be32_to_cpup(p++);
1da177e4
LT		 735
736 if (lock->lk_is_new) {
e31a1b66 737 READ_BUF(4);
06553991 738 lock->lk_new_open_seqid = be32_to_cpup(p++);
e31a1b66
BH		 739 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
740 if (status)
741 return status;
742 READ_BUF(8 + sizeof(clientid_t));
06553991 743 lock->lk_new_lock_seqid = be32_to_cpup(p++);
1da177e4 744 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
06553991 745 lock->lk_new_owner.len = be32_to_cpup(p++);
1da177e4
LT		 746 READ_BUF(lock->lk_new_owner.len);
747 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
748 } else {
e31a1b66
BH		 749 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
750 if (status)
751 return status;
752 READ_BUF(4);
06553991 753 lock->lk_old_lock_seqid = be32_to_cpup(p++);
1da177e4
LT		 754 }
755
756 DECODE_TAIL;
757}
758
b37ad28b 759static __be32
1da177e4
LT		 760nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
761{
762 DECODE_HEAD;
763
764 READ_BUF(32);
06553991 765 lockt->lt_type = be32_to_cpup(p++);
1da177e4
LT		 766 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
767 goto xdr_error;
542d1ab3
BF		 768 p = xdr_decode_hyper(p, &lockt->lt_offset);
769 p = xdr_decode_hyper(p, &lockt->lt_length);
1da177e4 770 COPYMEM(&lockt->lt_clientid, 8);
06553991 771 lockt->lt_owner.len = be32_to_cpup(p++);
1da177e4
LT		 772 READ_BUF(lockt->lt_owner.len);
773 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
774
775 DECODE_TAIL;
776}
777
b37ad28b 778static __be32
1da177e4
LT		 779nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
780{
781 DECODE_HEAD;
782
e31a1b66 783 READ_BUF(8);
06553991 784 locku->lu_type = be32_to_cpup(p++);
1da177e4
LT		 785 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
786 goto xdr_error;
06553991 787 locku->lu_seqid = be32_to_cpup(p++);
e31a1b66
BH		 788 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
789 if (status)
790 return status;
791 READ_BUF(16);
542d1ab3
BF		 792 p = xdr_decode_hyper(p, &locku->lu_offset);
793 p = xdr_decode_hyper(p, &locku->lu_length);
1da177e4
LT		 794
795 DECODE_TAIL;
796}
797
b37ad28b 798static __be32
1da177e4
LT		 799nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
800{
801 DECODE_HEAD;
802
803 READ_BUF(4);
06553991 804 lookup->lo_len = be32_to_cpup(p++);
1da177e4
LT		 805 READ_BUF(lookup->lo_len);
806 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 807 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 808 return status;
809
810 DECODE_TAIL;
811}
812
2c8bd7e0 813static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 814{
815 __be32 *p;
816 u32 w;
817
818 READ_BUF(4);
06553991 819 w = be32_to_cpup(p++);
2c8bd7e0
BH		 820 *share_access = w & NFS4_SHARE_ACCESS_MASK;
821 *deleg_want = w & NFS4_SHARE_WANT_MASK;
822 if (deleg_when)
823 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
824
04f9e664
BF		 825 switch (w & NFS4_SHARE_ACCESS_MASK) {
826 case NFS4_SHARE_ACCESS_READ:
827 case NFS4_SHARE_ACCESS_WRITE:
828 case NFS4_SHARE_ACCESS_BOTH:
829 break;
830 default:
831 return nfserr_bad_xdr;
832 }
fc0d14fe 833 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 834 if (!w)
835 return nfs_ok;
836 if (!argp->minorversion)
837 return nfserr_bad_xdr;
838 switch (w & NFS4_SHARE_WANT_MASK) {
839 case NFS4_SHARE_WANT_NO_PREFERENCE:
840 case NFS4_SHARE_WANT_READ_DELEG:
841 case NFS4_SHARE_WANT_WRITE_DELEG:
842 case NFS4_SHARE_WANT_ANY_DELEG:
843 case NFS4_SHARE_WANT_NO_DELEG:
844 case NFS4_SHARE_WANT_CANCEL:
845 break;
846 default:
847 return nfserr_bad_xdr;
848 }
92bac8c5 849 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 850 if (!w)
851 return nfs_ok;
2c8bd7e0
BH		 852
853 if (!deleg_when) /* open_downgrade */
854 return nfserr_inval;
04f9e664
BF		 855 switch (w) {
856 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
857 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 858 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
859 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 860 return nfs_ok;
861 }
862xdr_error:
863 return nfserr_bad_xdr;
864}
865
866static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
867{
868 __be32 *p;
869
870 READ_BUF(4);
06553991 871 *x = be32_to_cpup(p++);
04f9e664 872 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 873 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 874 return nfserr_bad_xdr;
875 return nfs_ok;
876xdr_error:
877 return nfserr_bad_xdr;
878}
879
a084daf5
BF		 880static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
881{
882 __be32 *p;
883
884 READ_BUF(4);
06553991 885 o->len = be32_to_cpup(p++);
a084daf5
BF		 886
887 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
888 return nfserr_bad_xdr;
889
890 READ_BUF(o->len);
891 SAVEMEM(o->data, o->len);
892 return nfs_ok;
893xdr_error:
894 return nfserr_bad_xdr;
895}
896
b37ad28b 897static __be32
1da177e4
LT		 898nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
899{
900 DECODE_HEAD;
2c8bd7e0 901 u32 dummy;
1da177e4
LT		 902
903 memset(open->op_bmval, 0, sizeof(open->op_bmval));
904 open->op_iattr.ia_valid = 0;
fe0750e5 905 open->op_openowner = NULL;
1da177e4 906
9d313b17 907 open->op_xdr_error = 0;
1da177e4 908 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 909 READ_BUF(4);
06553991 910 open->op_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 911 /* decode, yet ignore deleg_when until supported */
912 status = nfsd4_decode_share_access(argp, &open->op_share_access,
913 &open->op_deleg_want, &dummy);
04f9e664
BF		 914 if (status)
915 goto xdr_error;
916 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
917 if (status)
918 goto xdr_error;
a084daf5 919 READ_BUF(sizeof(clientid_t));
1da177e4 920 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 921 status = nfsd4_decode_opaque(argp, &open->op_owner);
922 if (status)
923 goto xdr_error;
924 READ_BUF(4);
06553991 925 open->op_create = be32_to_cpup(p++);
1da177e4
LT		 926 switch (open->op_create) {
927 case NFS4_OPEN_NOCREATE:
928 break;
929 case NFS4_OPEN_CREATE:
930 READ_BUF(4);
06553991 931 open->op_createmode = be32_to_cpup(p++);
1da177e4
LT		 932 switch (open->op_createmode) {
933 case NFS4_CREATE_UNCHECKED:
934 case NFS4_CREATE_GUARDED:
c0d6fc8a 935 status = nfsd4_decode_fattr(argp, open->op_bmval,
47057abd 936 &open->op_iattr, &open->op_acl, &open->op_label,
9d509800 937 &open->op_umask);
c0d6fc8a 938 if (status)
1da177e4
LT		 939 goto out;
940 break;
941 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 942 READ_BUF(NFS4_VERIFIER_SIZE);
943 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 944 break;
79fb54ab
BH		 945 case NFS4_CREATE_EXCLUSIVE4_1:
946 if (argp->minorversion < 1)
947 goto xdr_error;
ab4684d1
CL		 948 READ_BUF(NFS4_VERIFIER_SIZE);
949 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 950 status = nfsd4_decode_fattr(argp, open->op_bmval,
47057abd 951 &open->op_iattr, &open->op_acl, &open->op_label,
9d509800 952 &open->op_umask);
79fb54ab
BH		 953 if (status)
954 goto out;
955 break;
1da177e4
LT		 956 default:
957 goto xdr_error;
958 }
959 break;
960 default:
961 goto xdr_error;
962 }
963
964 /* open_claim */
965 READ_BUF(4);
06553991 966 open->op_claim_type = be32_to_cpup(p++);
1da177e4
LT		 967 switch (open->op_claim_type) {
968 case NFS4_OPEN_CLAIM_NULL:
969 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
970 READ_BUF(4);
06553991 971 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 972 READ_BUF(open->op_fname.len);
973 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 974 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 975 return status;
976 break;
977 case NFS4_OPEN_CLAIM_PREVIOUS:
978 READ_BUF(4);
06553991 979 open->op_delegate_type = be32_to_cpup(p++);
1da177e4
LT		 980 break;
981 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 982 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
983 if (status)
984 return status;
985 READ_BUF(4);
06553991 986 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 987 READ_BUF(open->op_fname.len);
988 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 989 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 990 return status;
991 break;
8b289b2c
BF		 992 case NFS4_OPEN_CLAIM_FH:
993 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
994 if (argp->minorversion < 1)
995 goto xdr_error;
996 /* void */
997 break;
998 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
999 if (argp->minorversion < 1)
1000 goto xdr_error;
1001 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
1002 if (status)
1003 return status;
1004 break;
1da177e4
LT		 1005 default:
1006 goto xdr_error;
1007 }
1008
1009 DECODE_TAIL;
1010}
1011
b37ad28b 1012static __be32
1da177e4
LT		 1013nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1014{
1015 DECODE_HEAD;
e1a90ebd
AS		 1016
1017 if (argp->minorversion >= 1)
1018 return nfserr_notsupp;
1019
e31a1b66
BH		 1020 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
1021 if (status)
1022 return status;
1023 READ_BUF(4);
06553991 1024 open_conf->oc_seqid = be32_to_cpup(p++);
e1a90ebd 1025
1da177e4
LT		 1026 DECODE_TAIL;
1027}
1028
b37ad28b 1029static __be32
1da177e4
LT		 1030nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1031{
1032 DECODE_HEAD;
1033
e31a1b66
BH		 1034 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
1035 if (status)
1036 return status;
04f9e664 1037 READ_BUF(4);
06553991 1038 open_down->od_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 1039 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1040 &open_down->od_deleg_want, NULL);
04f9e664
BF		 1041 if (status)
1042 return status;
1043 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1044 if (status)
1045 return status;
1da177e4
LT		 1046 DECODE_TAIL;
1047}
1048
b37ad28b 1049static __be32
1da177e4
LT		 1050nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1051{
1052 DECODE_HEAD;
1053
1054 READ_BUF(4);
06553991 1055 putfh->pf_fhlen = be32_to_cpup(p++);
1da177e4
LT		 1056 if (putfh->pf_fhlen > NFS4_FHSIZE)
1057 goto xdr_error;
1058 READ_BUF(putfh->pf_fhlen);
1059 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1060
1061 DECODE_TAIL;
1062}
1063
e1a90ebd
AS		 1064static __be32
1065nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1066{
1067 if (argp->minorversion == 0)
1068 return nfs_ok;
1069 return nfserr_notsupp;
1070}
1071
b37ad28b 1072static __be32
1da177e4
LT		 1073nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1074{
1075 DECODE_HEAD;
1076
e31a1b66
BH		 1077 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1078 if (status)
1079 return status;
1080 READ_BUF(12);
542d1ab3 1081 p = xdr_decode_hyper(p, &read->rd_offset);
06553991 1082 read->rd_length = be32_to_cpup(p++);
1da177e4
LT		 1083
1084 DECODE_TAIL;
1085}
1086
b37ad28b 1087static __be32
1da177e4
LT		 1088nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1089{
1090 DECODE_HEAD;
1091
1092 READ_BUF(24);
542d1ab3 1093 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1da177e4 1094 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
06553991
BF		 1095 readdir->rd_dircount = be32_to_cpup(p++);
1096 readdir->rd_maxcount = be32_to_cpup(p++);
1da177e4
LT		 1097 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1098 goto out;
1099
1100 DECODE_TAIL;
1101}
1102
b37ad28b 1103static __be32
1da177e4
LT		 1104nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1105{
1106 DECODE_HEAD;
1107
1108 READ_BUF(4);
06553991 1109 remove->rm_namelen = be32_to_cpup(p++);
1da177e4
LT		 1110 READ_BUF(remove->rm_namelen);
1111 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1112 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1113 return status;
1114
1115 DECODE_TAIL;
1116}
1117
b37ad28b 1118static __be32
1da177e4
LT		 1119nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1120{
1121 DECODE_HEAD;
1122
1123 READ_BUF(4);
06553991 1124 rename->rn_snamelen = be32_to_cpup(p++);
4aed9c46 1125 READ_BUF(rename->rn_snamelen);
1da177e4 1126 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
4aed9c46 1127 READ_BUF(4);
06553991 1128 rename->rn_tnamelen = be32_to_cpup(p++);
1da177e4
LT		 1129 READ_BUF(rename->rn_tnamelen);
1130 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1131 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1132 return status;
a36b1725 1133 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1134 return status;
1135
1136 DECODE_TAIL;
1137}
1138
b37ad28b 1139static __be32
1da177e4
LT		 1140nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1141{
1142 DECODE_HEAD;
1143
e1a90ebd
AS		 1144 if (argp->minorversion >= 1)
1145 return nfserr_notsupp;
1146
1da177e4
LT		 1147 READ_BUF(sizeof(clientid_t));
1148 COPYMEM(clientid, sizeof(clientid_t));
1149
1150 DECODE_TAIL;
1151}
1152
dcb488a3
AA		 1153static __be32
1154nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1155 struct nfsd4_secinfo *secinfo)
1156{
1157 DECODE_HEAD;
1158
1159 READ_BUF(4);
06553991 1160 secinfo->si_namelen = be32_to_cpup(p++);
dcb488a3
AA		 1161 READ_BUF(secinfo->si_namelen);
1162 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1163 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1164 if (status)
1165 return status;
1166 DECODE_TAIL;
1167}
1168
04f4ad16
BF		 1169static __be32
1170nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1171 struct nfsd4_secinfo_no_name *sin)
1172{
1173 DECODE_HEAD;
1174
1175 READ_BUF(4);
06553991 1176 sin->sin_style = be32_to_cpup(p++);
04f4ad16
BF		 1177 DECODE_TAIL;
1178}
1179
b37ad28b 1180static __be32
1da177e4
LT		 1181nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1182{
e31a1b66 1183 __be32 status;
1da177e4 1184
e31a1b66
BH		 1185 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1186 if (status)
1187 return status;
3c8e0316 1188 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
47057abd 1189 &setattr->sa_acl, &setattr->sa_label, NULL);
1da177e4
LT		 1190}
1191
b37ad28b 1192static __be32
1da177e4
LT		 1193nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1194{
1195 DECODE_HEAD;
1196
e1a90ebd
AS		 1197 if (argp->minorversion >= 1)
1198 return nfserr_notsupp;
1199
ab4684d1
CL		 1200 READ_BUF(NFS4_VERIFIER_SIZE);
1201 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1202
a084daf5
BF		 1203 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1204 if (status)
1205 return nfserr_bad_xdr;
1206 READ_BUF(8);
06553991
BF		 1207 setclientid->se_callback_prog = be32_to_cpup(p++);
1208 setclientid->se_callback_netid_len = be32_to_cpup(p++);
4aed9c46 1209 READ_BUF(setclientid->se_callback_netid_len);
1da177e4 1210 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
4aed9c46 1211 READ_BUF(4);
06553991 1212 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1da177e4 1213
4aed9c46 1214 READ_BUF(setclientid->se_callback_addr_len);
1da177e4 1215 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
4aed9c46 1216 READ_BUF(4);
06553991 1217 setclientid->se_callback_ident = be32_to_cpup(p++);
1da177e4
LT		 1218
1219 DECODE_TAIL;
1220}
1221
b37ad28b 1222static __be32
1da177e4
LT		 1223nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1224{
1225 DECODE_HEAD;
1226
e1a90ebd
AS		 1227 if (argp->minorversion >= 1)
1228 return nfserr_notsupp;
1229
ab4684d1 1230 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1231 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1232 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1233
1234 DECODE_TAIL;
1235}
1236
1237/* Also used for NVERIFY */
b37ad28b 1238static __be32
1da177e4
LT		 1239nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1240{
1da177e4
LT		 1241 DECODE_HEAD;
1242
1243 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1244 goto out;
1245
1246 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1247 * nfsd4_proc_verify */
1248
1da177e4 1249 READ_BUF(4);
06553991 1250 verify->ve_attrlen = be32_to_cpup(p++);
1da177e4
LT		 1251 READ_BUF(verify->ve_attrlen);
1252 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1253
1254 DECODE_TAIL;
1255}
1256
b37ad28b 1257static __be32
1da177e4
LT		 1258nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1259{
1260 int avail;
1da177e4
LT		 1261 int len;
1262 DECODE_HEAD;
1263
e31a1b66
BH		 1264 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1265 if (status)
1266 return status;
1267 READ_BUF(16);
542d1ab3 1268 p = xdr_decode_hyper(p, &write->wr_offset);
06553991 1269 write->wr_stable_how = be32_to_cpup(p++);
54bbb7d2 1270 if (write->wr_stable_how > NFS_FILE_SYNC)
1da177e4 1271 goto xdr_error;
06553991 1272 write->wr_buflen = be32_to_cpup(p++);
1da177e4
LT		 1273
1274 /* Sorry .. no magic macros for this.. *
1275 * READ_BUF(write->wr_buflen);
1276 * SAVEMEM(write->wr_buf, write->wr_buflen);
1277 */
1278 avail = (char*)argp->end - (char*)argp->p;
1279 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1280 dprintk("NFSD: xdr error (%s:%d)\n",
1281 __FILE__, __LINE__);
1da177e4
LT		 1282 goto xdr_error;
1283 }
70cc7f75
BF		 1284 write->wr_head.iov_base = p;
1285 write->wr_head.iov_len = avail;
70cc7f75 1286 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1287
1288 len = XDR_QUADLEN(write->wr_buflen) << 2;
1289 if (len >= avail) {
1290 int pages;
1291
1292 len -= avail;
1293
1294 pages = len >> PAGE_SHIFT;
1295 argp->pagelist += pages;
1296 argp->pagelen -= pages * PAGE_SIZE;
1297 len -= pages * PAGE_SIZE;
1298
fc788f64 1299 next_decode_page(argp);
1da177e4 1300 }
5a80a54d 1301 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1302
1303 DECODE_TAIL;
1304}
1305
b37ad28b 1306static __be32
1da177e4
LT		 1307nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1308{
1309 DECODE_HEAD;
1310
e1a90ebd
AS		 1311 if (argp->minorversion >= 1)
1312 return nfserr_notsupp;
1313
1da177e4
LT		 1314 READ_BUF(12);
1315 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
06553991 1316 rlockowner->rl_owner.len = be32_to_cpup(p++);
1da177e4
LT		 1317 READ_BUF(rlockowner->rl_owner.len);
1318 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1319
60adfc50
AA		 1320 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1321 return nfserr_inval;
1da177e4
LT		 1322 DECODE_TAIL;
1323}
1324
2db134eb
AA		 1325static __be32
1326nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1327 struct nfsd4_exchange_id *exid)
2db134eb 1328{
5afa040b 1329 int dummy, tmp;
0733d213
AA		 1330 DECODE_HEAD;
1331
1332 READ_BUF(NFS4_VERIFIER_SIZE);
1333 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1334
a084daf5
BF		 1335 status = nfsd4_decode_opaque(argp, &exid->clname);
1336 if (status)
1337 return nfserr_bad_xdr;
0733d213
AA		 1338
1339 READ_BUF(4);
06553991 1340 exid->flags = be32_to_cpup(p++);
0733d213
AA		 1341
1342 /* Ignore state_protect4_a */
1343 READ_BUF(4);
06553991 1344 exid->spa_how = be32_to_cpup(p++);
0733d213
AA		 1345 switch (exid->spa_how) {
1346 case SP4_NONE:
1347 break;
1348 case SP4_MACH_CRED:
1349 /* spo_must_enforce */
ed941643
AE		 1350 status = nfsd4_decode_bitmap(argp,
1351 exid->spo_must_enforce);
1352 if (status)
1353 goto out;
0733d213 1354 /* spo_must_allow */
ed941643
AE		 1355 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
1356 if (status)
1357 goto out;
0733d213
AA		 1358 break;
1359 case SP4_SSV:
1360 /* ssp_ops */
1361 READ_BUF(4);
06553991 1362 dummy = be32_to_cpup(p++);
0733d213
AA		 1363 READ_BUF(dummy * 4);
1364 p += dummy;
1365
1366 READ_BUF(4);
06553991 1367 dummy = be32_to_cpup(p++);
0733d213
AA		 1368 READ_BUF(dummy * 4);
1369 p += dummy;
1370
1371 /* ssp_hash_algs<> */
1372 READ_BUF(4);
06553991 1373 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1374 while (tmp--) {
1375 READ_BUF(4);
06553991 1376 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1377 READ_BUF(dummy);
1378 p += XDR_QUADLEN(dummy);
1379 }
0733d213
AA		 1380
1381 /* ssp_encr_algs<> */
1382 READ_BUF(4);
06553991 1383 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1384 while (tmp--) {
1385 READ_BUF(4);
06553991 1386 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1387 READ_BUF(dummy);
1388 p += XDR_QUADLEN(dummy);
1389 }
0733d213
AA		 1390
1391 /* ssp_window and ssp_num_gss_handles */
1392 READ_BUF(8);
06553991
BF		 1393 dummy = be32_to_cpup(p++);
1394 dummy = be32_to_cpup(p++);
0733d213
AA		 1395 break;
1396 default:
1397 goto xdr_error;
1398 }
1399
1400 /* Ignore Implementation ID */
1401 READ_BUF(4); /* nfs_impl_id4 array length */
06553991 1402 dummy = be32_to_cpup(p++);
0733d213
AA		 1403
1404 if (dummy > 1)
1405 goto xdr_error;
1406
1407 if (dummy == 1) {
1408 /* nii_domain */
1409 READ_BUF(4);
06553991 1410 dummy = be32_to_cpup(p++);
0733d213
AA		 1411 READ_BUF(dummy);
1412 p += XDR_QUADLEN(dummy);
1413
1414 /* nii_name */
1415 READ_BUF(4);
06553991 1416 dummy = be32_to_cpup(p++);
0733d213
AA		 1417 READ_BUF(dummy);
1418 p += XDR_QUADLEN(dummy);
1419
1420 /* nii_date */
1421 READ_BUF(12);
1422 p += 3;
1423 }
1424 DECODE_TAIL;
2db134eb
AA		 1425}
1426
1427static __be32
1428nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1429 struct nfsd4_create_session *sess)
1430{
ec6b5d7b 1431 DECODE_HEAD;
ec6b5d7b 1432 u32 dummy;
ec6b5d7b
AA		 1433
1434 READ_BUF(16);
1435 COPYMEM(&sess->clientid, 8);
06553991
BF		 1436 sess->seqid = be32_to_cpup(p++);
1437 sess->flags = be32_to_cpup(p++);
ec6b5d7b
AA		 1438
1439 /* Fore channel attrs */
1440 READ_BUF(28);
06553991
BF		 1441 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1442 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1443 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1444 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1445 sess->fore_channel.maxops = be32_to_cpup(p++);
1446 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1447 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1448 if (sess->fore_channel.nr_rdma_attrs == 1) {
1449 READ_BUF(4);
06553991 1450 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1451 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1452 dprintk("Too many fore channel attr bitmaps!\n");
1453 goto xdr_error;
1454 }
1455
1456 /* Back channel attrs */
1457 READ_BUF(28);
06553991
BF		 1458 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1459 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1460 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1461 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1462 sess->back_channel.maxops = be32_to_cpup(p++);
1463 sess->back_channel.maxreqs = be32_to_cpup(p++);
1464 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1465 if (sess->back_channel.nr_rdma_attrs == 1) {
1466 READ_BUF(4);
06553991 1467 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1468 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1469 dprintk("Too many back channel attr bitmaps!\n");
1470 goto xdr_error;
1471 }
1472
acb2887e 1473 READ_BUF(4);
06553991 1474 sess->callback_prog = be32_to_cpup(p++);
acb2887e 1475 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1476 DECODE_TAIL;
2db134eb
AA		 1477}
1478
1479static __be32
1480nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1481 struct nfsd4_destroy_session *destroy_session)
1482{
e10e0cfc
BH		 1483 DECODE_HEAD;
1484 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1485 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1486
1487 DECODE_TAIL;
2db134eb
AA		 1488}
1489
e1ca12df
BS		 1490static __be32
1491nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1492 struct nfsd4_free_stateid *free_stateid)
1493{
1494 DECODE_HEAD;
1495
1496 READ_BUF(sizeof(stateid_t));
06553991 1497 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
e1ca12df
BS		 1498 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1499
1500 DECODE_TAIL;
1501}
1502
2db134eb
AA		 1503static __be32
1504nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1505 struct nfsd4_sequence *seq)
1506{
b85d4c01
BH		 1507 DECODE_HEAD;
1508
1509 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1510 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991
BF		 1511 seq->seqid = be32_to_cpup(p++);
1512 seq->slotid = be32_to_cpup(p++);
1513 seq->maxslots = be32_to_cpup(p++);
1514 seq->cachethis = be32_to_cpup(p++);
b85d4c01
BH		 1515
1516 DECODE_TAIL;
2db134eb
AA		 1517}
1518
17456804
BS		 1519static __be32
1520nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1521{
17456804 1522 int i;
03cfb420
BS		 1523 __be32 *p, status;
1524 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1525
1526 READ_BUF(4);
1527 test_stateid->ts_num_ids = ntohl(*p++);
1528
03cfb420 1529 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1530
1531 for (i = 0; i < test_stateid->ts_num_ids; i++) {
d5e23383 1532 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
03cfb420 1533 if (!stateid) {
afcf6792 1534 status = nfserrno(-ENOMEM);
03cfb420
BS		 1535 goto out;
1536 }
1537
03cfb420
BS		 1538 INIT_LIST_HEAD(&stateid->ts_id_list);
1539 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1540
1541 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1542 if (status)
03cfb420 1543 goto out;
17456804
BS		 1544 }
1545
1546 status = 0;
1547out:
1548 return status;
1549xdr_error:
1550 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1551 status = nfserr_bad_xdr;
1552 goto out;
1553}
1554
345c2842
MJ		 1555static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1556{
1557 DECODE_HEAD;
1558
1559 READ_BUF(8);
1560 COPYMEM(&dc->clientid, 8);
1561
1562 DECODE_TAIL;
1563}
1564
4dc6ec00
BF		 1565static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1566{
1567 DECODE_HEAD;
1568
1569 READ_BUF(4);
06553991 1570 rc->rca_one_fs = be32_to_cpup(p++);
4dc6ec00
BF		 1571
1572 DECODE_TAIL;
1573}
1574
9cf514cc
CH		 1575#ifdef CONFIG_NFSD_PNFS
1576static __be32
1577nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1578 struct nfsd4_getdeviceinfo *gdev)
1579{
1580 DECODE_HEAD;
1581 u32 num, i;
1582
1583 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1584 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1585 gdev->gd_layout_type = be32_to_cpup(p++);
1586 gdev->gd_maxcount = be32_to_cpup(p++);
1587 num = be32_to_cpup(p++);
1588 if (num) {
1589 READ_BUF(4 * num);
1590 gdev->gd_notify_types = be32_to_cpup(p++);
1591 for (i = 1; i < num; i++) {
1592 if (be32_to_cpup(p++)) {
1593 status = nfserr_inval;
1594 goto out;
1595 }
1596 }
1597 }
1598 DECODE_TAIL;
1599}
1600
1601static __be32
1602nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1603 struct nfsd4_layoutget *lgp)
1604{
1605 DECODE_HEAD;
1606
1607 READ_BUF(36);
1608 lgp->lg_signal = be32_to_cpup(p++);
1609 lgp->lg_layout_type = be32_to_cpup(p++);
1610 lgp->lg_seg.iomode = be32_to_cpup(p++);
1611 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1612 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1613 p = xdr_decode_hyper(p, &lgp->lg_minlength);
db59c0ef
KM		 1614
1615 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1616 if (status)
1617 return status;
1618
9cf514cc
CH		 1619 READ_BUF(4);
1620 lgp->lg_maxcount = be32_to_cpup(p++);
1621
1622 DECODE_TAIL;
1623}
1624
1625static __be32
1626nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1627 struct nfsd4_layoutcommit *lcp)
1628{
1629 DECODE_HEAD;
1630 u32 timechange;
1631
1632 READ_BUF(20);
1633 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1634 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1635 lcp->lc_reclaim = be32_to_cpup(p++);
db59c0ef
KM		 1636
1637 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1638 if (status)
1639 return status;
1640
9cf514cc
CH		 1641 READ_BUF(4);
1642 lcp->lc_newoffset = be32_to_cpup(p++);
1643 if (lcp->lc_newoffset) {
1644 READ_BUF(8);
1645 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1646 } else
1647 lcp->lc_last_wr = 0;
1648 READ_BUF(4);
1649 timechange = be32_to_cpup(p++);
1650 if (timechange) {
1651 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1652 if (status)
1653 return status;
1654 } else {
1655 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1656 }
1657 READ_BUF(8);
1658 lcp->lc_layout_type = be32_to_cpup(p++);
1659
1660 /*
1661 * Save the layout update in XDR format and let the layout driver deal
1662 * with it later.
1663 */
1664 lcp->lc_up_len = be32_to_cpup(p++);
1665 if (lcp->lc_up_len > 0) {
1666 READ_BUF(lcp->lc_up_len);
1667 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1668 }
1669
1670 DECODE_TAIL;
1671}
1672
1673static __be32
1674nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1675 struct nfsd4_layoutreturn *lrp)
1676{
1677 DECODE_HEAD;
1678
1679 READ_BUF(16);
1680 lrp->lr_reclaim = be32_to_cpup(p++);
1681 lrp->lr_layout_type = be32_to_cpup(p++);
1682 lrp->lr_seg.iomode = be32_to_cpup(p++);
1683 lrp->lr_return_type = be32_to_cpup(p++);
1684 if (lrp->lr_return_type == RETURN_FILE) {
1685 READ_BUF(16);
1686 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1687 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
db59c0ef
KM		 1688
1689 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1690 if (status)
1691 return status;
1692
9cf514cc
CH		 1693 READ_BUF(4);
1694 lrp->lrf_body_len = be32_to_cpup(p++);
1695 if (lrp->lrf_body_len > 0) {
1696 READ_BUF(lrp->lrf_body_len);
1697 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1698 }
1699 } else {
1700 lrp->lr_seg.offset = 0;
1701 lrp->lr_seg.length = NFS4_MAX_UINT64;
1702 }
1703
1704 DECODE_TAIL;
1705}
1706#endif /* CONFIG_NFSD_PNFS */
1707
95d871f0
AS		 1708static __be32
1709nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1710 struct nfsd4_fallocate *fallocate)
1711{
1712 DECODE_HEAD;
1713
1714 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1715 if (status)
1716 return status;
1717
1718 READ_BUF(16);
1719 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1720 xdr_decode_hyper(p, &fallocate->falloc_length);
1721
1722 DECODE_TAIL;
1723}
1724
ffa0160a
CH		 1725static __be32
1726nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1727{
1728 DECODE_HEAD;
1729
1730 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1731 if (status)
1732 return status;
1733 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1734 if (status)
1735 return status;
1736
1737 READ_BUF(8 + 8 + 8);
1738 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1739 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1740 p = xdr_decode_hyper(p, &clone->cl_count);
1741 DECODE_TAIL;
1742}
1743
29ae7f9d
AS		 1744static __be32
1745nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1746{
1747 DECODE_HEAD;
1748 unsigned int tmp;
1749
1750 status = nfsd4_decode_stateid(argp, &copy->cp_src_stateid);
1751 if (status)
1752 return status;
1753 status = nfsd4_decode_stateid(argp, &copy->cp_dst_stateid);
1754 if (status)
1755 return status;
1756
1757 READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
1758 p = xdr_decode_hyper(p, &copy->cp_src_pos);
1759 p = xdr_decode_hyper(p, &copy->cp_dst_pos);
1760 p = xdr_decode_hyper(p, &copy->cp_count);
1761 copy->cp_consecutive = be32_to_cpup(p++);
1762 copy->cp_synchronous = be32_to_cpup(p++);
1763 tmp = be32_to_cpup(p); /* Source server list not supported */
1764
1765 DECODE_TAIL;
1766}
1767
24bab491
AS		 1768static __be32
1769nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1770{
1771 DECODE_HEAD;
1772
1773 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1774 if (status)
1775 return status;
1776
1777 READ_BUF(8 + 4);
1778 p = xdr_decode_hyper(p, &seek->seek_offset);
1779 seek->seek_whence = be32_to_cpup(p);
1780
1781 DECODE_TAIL;
1782}
1783
347e0ad9
BH		 1784static __be32
1785nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1786{
1787 return nfs_ok;
1788}
1789
3c375c6f
BH		 1790static __be32
1791nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1792{
1e685ec2 1793 return nfserr_notsupp;
3c375c6f
BH		 1794}
1795
347e0ad9
BH		 1796typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1797
c1df609d 1798static const nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1799 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1800 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1801 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1802 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1803 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1804 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1805 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1806 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1807 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1808 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1809 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1810 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1811 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1812 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1813 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1814 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1815 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1816 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1817 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1818 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1819 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1820 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1821 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1822 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1823 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1824 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1825 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1826 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1827 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1828 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1829 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1830 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1831 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1832 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1833 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1834 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1835 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1836
1837 /* new operations for NFSv4.1 */
cb73a9f4 1838 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1839 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1840 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1841 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1842 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1843 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae 1844 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc
CH		 1845#ifdef CONFIG_NFSD_PNFS
1846 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1847 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1848 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1849 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1850 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1851#else
9064caae
RD		 1852 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1853 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1854 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1855 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1856 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc 1857#endif
04f4ad16 1858 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1859 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1860 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1861 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1862 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1863 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1864 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
87a15a80
AS		 1865
1866 /* new operations for NFSv4.2 */
95d871f0 1867 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
29ae7f9d 1868 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
87a15a80 1869 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
b0cb9085 1870 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
87a15a80
AS		 1871 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1872 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1873 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1874 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1875 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1876 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
24bab491 1877 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
87a15a80 1878 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
ffa0160a 1879 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
2db134eb
AA		 1880};
1881
e1a90ebd
AS		 1882static inline bool
1883nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1884{
8217d146 1885 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1886 return false;
8217d146 1887 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1888 return false;
8217d146
AS		 1889 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1890 return false;
1891 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1892 return false;
1893 return true;
1894}
f2feb96b 1895
b37ad28b 1896static __be32
1da177e4
LT		 1897nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1898{
1899 DECODE_HEAD;
1900 struct nfsd4_op *op;
1091006c 1901 bool cachethis = false;
a5cddc88
BF		 1902 int auth_slack= argp->rqstp->rq_auth_slack;
1903 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 1904 int readcount = 0;
1905 int readbytes = 0;
1da177e4
LT		 1906 int i;
1907
1da177e4 1908 READ_BUF(4);
06553991 1909 argp->taglen = be32_to_cpup(p++);
4aed9c46 1910 READ_BUF(argp->taglen);
1da177e4 1911 SAVEMEM(argp->tag, argp->taglen);
4aed9c46 1912 READ_BUF(8);
06553991
BF		 1913 argp->minorversion = be32_to_cpup(p++);
1914 argp->opcnt = be32_to_cpup(p++);
4f0cefbf 1915 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 1916
1917 if (argp->taglen > NFSD4_MAX_TAGLEN)
1918 goto xdr_error;
1919 if (argp->opcnt > 100)
1920 goto xdr_error;
1921
e8c96f8c 1922 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
5d6031ca 1923 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1da177e4
LT		 1924 if (!argp->ops) {
1925 argp->ops = argp->iops;
817cb9d4 1926 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1927 goto xdr_error;
1928 }
1929 }
1930
e1a90ebd 1931 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1932 argp->opcnt = 0;
1933
1da177e4
LT		 1934 for (i = 0; i < argp->opcnt; i++) {
1935 op = &argp->ops[i];
1936 op->replay = NULL;
1937
8a61b18c 1938 READ_BUF(4);
06553991 1939 op->opnum = be32_to_cpup(p++);
1da177e4 1940
e1a90ebd
AS		 1941 if (nfsd4_opnum_in_range(argp, op))
1942 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1943 else {
1da177e4
LT		 1944 op->opnum = OP_ILLEGAL;
1945 op->status = nfserr_op_illegal;
1da177e4 1946 }
f4f9ef4a 1947 op->opdesc = OPDESC(op);
1091006c
BF		 1948 /*
1949 * We'll try to cache the result in the DRC if any one
1950 * op in the compound wants to be cached:
1951 */
1952 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 1953
b0e35fda
BF		 1954 if (op->opnum == OP_READ) {
1955 readcount++;
1956 readbytes += nfsd4_max_reply(argp->rqstp, op);
1957 } else
1958 max_reply += nfsd4_max_reply(argp->rqstp, op);
f7b43d0c 1959 /*
7323f0d2
KM		 1960 * OP_LOCK and OP_LOCKT may return a conflicting lock.
1961 * (Special case because it will just skip encoding this
1962 * if it runs out of xdr buffer space, and it is the only
1963 * operation that behaves this way.)
f7b43d0c 1964 */
7323f0d2 1965 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
f7b43d0c 1966 max_reply += NFS4_OPAQUE_LIMIT;
e372ba60
BF		 1967
1968 if (op->status) {
1969 argp->opcnt = i+1;
1970 break;
1971 }
1da177e4 1972 }
1091006c
BF		 1973 /* Sessions make the DRC unnecessary: */
1974 if (argp->minorversion)
1975 cachethis = false;
b0e35fda 1976 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 1977 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 1978
a5cddc88 1979 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
779fb0f3 1980 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
b0e35fda 1981
1da177e4
LT		 1982 DECODE_TAIL;
1983}
1da177e4 1984
b8800921
N		 1985static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
1986 struct svc_export *exp)
c654b8a9 1987{
b8800921
N		 1988 if (exp->ex_flags & NFSEXP_V4ROOT) {
1989 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
1990 *p++ = 0;
1991 } else if (IS_I_VERSION(inode)) {
630458e7 1992 p = xdr_encode_hyper(p, nfsd4_change_attribute(inode));
c654b8a9 1993 } else {
d05d5744
BF		 1994 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1995 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
c654b8a9 1996 }
d05d5744 1997 return p;
c654b8a9
BF		 1998}
1999
d05d5744 2000static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 2001{
d05d5744 2002 *p++ = cpu_to_be32(c->atomic);
c654b8a9 2003 if (c->change_supported) {
d05d5744
BF		 2004 p = xdr_encode_hyper(p, c->before_change);
2005 p = xdr_encode_hyper(p, c->after_change);
c654b8a9 2006 } else {
d05d5744
BF		 2007 *p++ = cpu_to_be32(c->before_ctime_sec);
2008 *p++ = cpu_to_be32(c->before_ctime_nsec);
2009 *p++ = cpu_to_be32(c->after_ctime_sec);
2010 *p++ = cpu_to_be32(c->after_ctime_nsec);
c654b8a9 2011 }
d05d5744 2012 return p;
c654b8a9 2013}
1da177e4 2014
81c3f413 2015/* Encode as an array of strings the string given with components
e7a0444a 2016 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 2017 */
ddd1ea56
BF		 2018static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2019 char *components, char esc_enter,
2020 char esc_exit)
81c3f413 2021{
ddd1ea56 2022 __be32 *p;
082d4bd7
BF		 2023 __be32 pathlen;
2024 int pathlen_offset;
81c3f413 2025 int strlen, count=0;
e7a0444a 2026 char *str, *end, *next;
81c3f413
BF		 2027
2028 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 2029
2030 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 2031 p = xdr_reserve_space(xdr, 4);
2032 if (!p)
81c3f413 2033 return nfserr_resource;
082d4bd7
BF		 2034 p++; /* We will fill this in with @count later */
2035
81c3f413
BF		 2036 end = str = components;
2037 while (*end) {
e7a0444a
WAA		 2038 bool found_esc = false;
2039
2040 /* try to parse as esc_start, ..., esc_end, sep */
2041 if (*str == esc_enter) {
2042 for (; *end && (*end != esc_exit); end++)
2043 /* find esc_exit or end of string */;
2044 next = end + 1;
2045 if (*end && (!*next || *next == sep)) {
2046 str++;
2047 found_esc = true;
2048 }
2049 }
2050
2051 if (!found_esc)
2052 for (; *end && (*end != sep); end++)
2053 /* find sep or end of string */;
2054
81c3f413
BF		 2055 strlen = end - str;
2056 if (strlen) {
ddd1ea56
BF		 2057 p = xdr_reserve_space(xdr, strlen + 4);
2058 if (!p)
81c3f413 2059 return nfserr_resource;
0c0c267b 2060 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 2061 count++;
2062 }
2063 else
2064 end++;
5a64e569
BC		 2065 if (found_esc)
2066 end = next;
2067
81c3f413
BF		 2068 str = end;
2069 }
bf7491f1 2070 pathlen = htonl(count);
082d4bd7 2071 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 2072 return 0;
2073}
2074
e7a0444a
WAA		 2075/* Encode as an array of strings the string given with components
2076 * separated @sep.
2077 */
ddd1ea56
BF		 2078static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2079 char *components)
e7a0444a 2080{
ddd1ea56 2081 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 2082}
2083
81c3f413
BF		 2084/*
2085 * encode a location element of a fs_locations structure
2086 */
ddd1ea56
BF		 2087static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2088 struct nfsd4_fs_location *location)
81c3f413 2089{
b37ad28b 2090 __be32 status;
81c3f413 2091
ddd1ea56 2092 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 2093 '[', ']');
81c3f413
BF		 2094 if (status)
2095 return status;
ddd1ea56 2096 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 2097 if (status)
2098 return status;
81c3f413
BF		 2099 return 0;
2100}
2101
2102/*
ed748aac 2103 * Encode a path in RFC3530 'pathname4' format
81c3f413 2104 */
ddd1ea56
BF		 2105static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2106 const struct path *root,
2107 const struct path *path)
81c3f413 2108{
301f0268 2109 struct path cur = *path;
ddd1ea56 2110 __be32 *p;
ed748aac
TM		 2111 struct dentry **components = NULL;
2112 unsigned int ncomponents = 0;
2113 __be32 err = nfserr_jukebox;
81c3f413 2114
ed748aac 2115 dprintk("nfsd4_encode_components(");
81c3f413 2116
ed748aac
TM		 2117 path_get(&cur);
2118 /* First walk the path up to the nfsd root, and store the
2119 * dentries/path components in an array.
2120 */
2121 for (;;) {
b77a4b2e 2122 if (path_equal(&cur, root))
ed748aac
TM		 2123 break;
2124 if (cur.dentry == cur.mnt->mnt_root) {
2125 if (follow_up(&cur))
2126 continue;
2127 goto out_free;
2128 }
2129 if ((ncomponents & 15) == 0) {
2130 struct dentry **new;
2131 new = krealloc(components,
2132 sizeof(*new) * (ncomponents + 16),
2133 GFP_KERNEL);
2134 if (!new)
2135 goto out_free;
2136 components = new;
2137 }
2138 components[ncomponents++] = cur.dentry;
2139 cur.dentry = dget_parent(cur.dentry);
2140 }
ddd1ea56
BF		 2141 err = nfserr_resource;
2142 p = xdr_reserve_space(xdr, 4);
2143 if (!p)
ed748aac 2144 goto out_free;
c373b0a4 2145 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 2146
2147 while (ncomponents) {
2148 struct dentry *dentry = components[ncomponents - 1];
301f0268 2149 unsigned int len;
ed748aac 2150
301f0268
AV		 2151 spin_lock(&dentry->d_lock);
2152 len = dentry->d_name.len;
ddd1ea56
BF		 2153 p = xdr_reserve_space(xdr, len + 4);
2154 if (!p) {
301f0268 2155 spin_unlock(&dentry->d_lock);
ed748aac 2156 goto out_free;
301f0268 2157 }
0c0c267b 2158 p = xdr_encode_opaque(p, dentry->d_name.name, len);
a455589f 2159 dprintk("/%pd", dentry);
301f0268 2160 spin_unlock(&dentry->d_lock);
ed748aac
TM		 2161 dput(dentry);
2162 ncomponents--;
81c3f413 2163 }
ed748aac 2164
ed748aac
TM		 2165 err = 0;
2166out_free:
2167 dprintk(")\n");
2168 while (ncomponents)
2169 dput(components[--ncomponents]);
2170 kfree(components);
2171 path_put(&cur);
2172 return err;
2173}
2174
ddd1ea56
BF		 2175static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2176 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 2177{
2178 struct svc_export *exp_ps;
2179 __be32 res;
2180
2181 exp_ps = rqst_find_fsidzero_export(rqstp);
2182 if (IS_ERR(exp_ps))
2183 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 2184 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 2185 exp_put(exp_ps);
2186 return res;
81c3f413
BF		 2187}
2188
2189/*
2190 * encode a fs_locations structure
2191 */
ddd1ea56
BF		 2192static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2193 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 2194{
b37ad28b 2195 __be32 status;
cc45f017 2196 int i;
ddd1ea56 2197 __be32 *p;
81c3f413 2198 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 2199
ddd1ea56 2200 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 2201 if (status)
2202 return status;
ddd1ea56
BF		 2203 p = xdr_reserve_space(xdr, 4);
2204 if (!p)
81c3f413 2205 return nfserr_resource;
c373b0a4 2206 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 2207 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 2208 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 2209 if (status)
2210 return status;
2211 }
81c3f413
BF		 2212 return 0;
2213}
1da177e4 2214
3d2544b1
BF		 2215static u32 nfs4_file_type(umode_t mode)
2216{
2217 switch (mode & S_IFMT) {
2218 case S_IFIFO: return NF4FIFO;
2219 case S_IFCHR: return NF4CHR;
2220 case S_IFDIR: return NF4DIR;
2221 case S_IFBLK: return NF4BLK;
2222 case S_IFLNK: return NF4LNK;
2223 case S_IFREG: return NF4REG;
2224 case S_IFSOCK: return NF4SOCK;
2225 default: return NF4BAD;
2226 };
2227}
1da177e4 2228
b37ad28b 2229static inline __be32
ddd1ea56
BF		 2230nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2231 struct nfs4_ace *ace)
1da177e4 2232{
3554116d 2233 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 2234 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 2235 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 2236 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 2237 else
ddd1ea56 2238 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 2239}
2240
6896f15a 2241static inline __be32
8a4c3926 2242nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
6896f15a 2243{
8a4c3926
JL		 2244 __be32 *p;
2245 unsigned long i = hweight_long(layout_types);
6896f15a 2246
8a4c3926
JL		 2247 p = xdr_reserve_space(xdr, 4 + 4 * i);
2248 if (!p)
2249 return nfserr_resource;
2250
2251 *p++ = cpu_to_be32(i);
2252
2253 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2254 if (layout_types & (1 << i))
2255 *p++ = cpu_to_be32(i);
6896f15a
KM		 2256
2257 return 0;
2258}
2259
42ca0993
BF		 2260#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2261 FATTR4_WORD0_RDATTR_ERROR)
2262#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
c2227a39 2263#define WORD2_ABSENT_FS_ATTRS 0
42ca0993 2264
18032ca0
DQ		 2265#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2266static inline __be32
ddd1ea56
BF		 2267nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2268 void *context, int len)
18032ca0 2269{
ddd1ea56 2270 __be32 *p;
18032ca0 2271
ddd1ea56
BF		 2272 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2273 if (!p)
18032ca0
DQ		 2274 return nfserr_resource;
2275
2276 /*
2277 * For now we use a 0 here to indicate the null translation; in
2278 * the future we may place a call to translation code here.
2279 */
c373b0a4
BF		 2280 *p++ = cpu_to_be32(0); /* lfs */
2281 *p++ = cpu_to_be32(0); /* pi */
18032ca0 2282 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 2283 return 0;
2284}
2285#else
2286static inline __be32
ddd1ea56
BF		 2287nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2288 void *context, int len)
18032ca0
DQ		 2289{ return 0; }
2290#endif
2291
c2227a39 2292static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
42ca0993
BF		 2293{
2294 /* As per referral draft: */
2295 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2296 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2297 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2298 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2299 *rdattr_err = NFSERR_MOVED;
2300 else
2301 return nfserr_moved;
2302 }
2303 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2304 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
c2227a39 2305 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
42ca0993
BF		 2306 return 0;
2307}
1da177e4 2308
ae7095a7
BF		 2309
2310static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2311{
2312 struct path path = exp->ex_path;
2313 int err;
2314
2315 path_get(&path);
2316 while (follow_up(&path)) {
2317 if (path.dentry != path.mnt->mnt_root)
2318 break;
2319 }
a528d35e 2320 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
ae7095a7
BF		 2321 path_put(&path);
2322 return err;
2323}
2324
75976de6
KM		 2325static __be32
2326nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2327{
2328 __be32 *p;
2329
2330 if (bmval2) {
2331 p = xdr_reserve_space(xdr, 16);
2332 if (!p)
2333 goto out_resource;
2334 *p++ = cpu_to_be32(3);
2335 *p++ = cpu_to_be32(bmval0);
2336 *p++ = cpu_to_be32(bmval1);
2337 *p++ = cpu_to_be32(bmval2);
2338 } else if (bmval1) {
2339 p = xdr_reserve_space(xdr, 12);
2340 if (!p)
2341 goto out_resource;
2342 *p++ = cpu_to_be32(2);
2343 *p++ = cpu_to_be32(bmval0);
2344 *p++ = cpu_to_be32(bmval1);
2345 } else {
2346 p = xdr_reserve_space(xdr, 8);
2347 if (!p)
2348 goto out_resource;
2349 *p++ = cpu_to_be32(1);
2350 *p++ = cpu_to_be32(bmval0);
2351 }
2352
2353 return 0;
2354out_resource:
2355 return nfserr_resource;
2356}
2357
1da177e4
LT		 2358/*
2359 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2360 * ourselves.
1da177e4 2361 */
da2ebce6 2362static __be32
d5184658
BF		 2363nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2364 struct svc_export *exp,
2365 struct dentry *dentry, u32 *bmval,
406a7ea9 2366 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2367{
2368 u32 bmval0 = bmval[0];
2369 u32 bmval1 = bmval[1];
7e705706 2370 u32 bmval2 = bmval[2];
1da177e4 2371 struct kstat stat;
d50e6136 2372 struct svc_fh *tempfh = NULL;
1da177e4 2373 struct kstatfs statfs;
ddd1ea56 2374 __be32 *p;
1fcea5b2 2375 int starting_len = xdr->buf->len;
082d4bd7
BF		 2376 int attrlen_offset;
2377 __be32 attrlen;
1da177e4
LT		 2378 u32 dummy;
2379 u64 dummy64;
42ca0993 2380 u32 rdattr_err = 0;
b37ad28b 2381 __be32 status;
b8dd7b9a 2382 int err;
1da177e4 2383 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2384 void *context = NULL;
2385 int contextlen;
2386 bool contextsupport = false;
7e705706
AA		 2387 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2388 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2389 struct path path = {
2390 .mnt = exp->ex_path.mnt,
2391 .dentry = dentry,
2392 };
3d733711 2393 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2394
2395 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
916d2d84 2396 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
1da177e4 2397
42ca0993 2398 if (exp->ex_fslocs.migrated) {
c2227a39 2399 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
42ca0993
BF		 2400 if (status)
2401 goto out;
2402 }
2403
a528d35e 2404 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
b8dd7b9a 2405 if (err)
1da177e4 2406 goto out_nfserr;
12337901
CH		 2407 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2408 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2409 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2410 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2411 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2412 if (err)
1da177e4
LT		 2413 goto out_nfserr;
2414 }
2415 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2416 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2417 status = nfserr_jukebox;
2418 if (!tempfh)
2419 goto out;
2420 fh_init(tempfh, NFS4_FHSIZE);
2421 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2422 if (status)
2423 goto out;
d50e6136 2424 fhp = tempfh;
1da177e4 2425 }
0c9d65e7 2426 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2427 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
0c9d65e7
AG		 2428 if (err == -EOPNOTSUPP)
2429 bmval0 &= ~FATTR4_WORD0_ACL;
2430 else if (err == -EINVAL) {
2431 status = nfserr_attrnotsupp;
2432 goto out;
2433 } else if (err != 0)
2434 goto out_nfserr;
1da177e4 2435 }
1da177e4 2436
18032ca0 2437#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
c2227a39
KM		 2438 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2439 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
32ddd944
BF		 2440 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2441 err = security_inode_getsecctx(d_inode(dentry),
18032ca0 2442 &context, &contextlen);
32ddd944
BF		 2443 else
2444 err = -EOPNOTSUPP;
18032ca0
DQ		 2445 contextsupport = (err == 0);
2446 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2447 if (err == -EOPNOTSUPP)
2448 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2449 else if (err)
2450 goto out_nfserr;
2451 }
2452 }
2453#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2454
75976de6
KM		 2455 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2456 if (status)
2457 goto out;
082d4bd7
BF		 2458
2459 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2460 p = xdr_reserve_space(xdr, 4);
2461 if (!p)
2462 goto out_resource;
082d4bd7 2463 p++; /* to be backfilled later */
1da177e4
LT		 2464
2465 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
dcd20869
BF		 2466 u32 supp[3];
2467
2468 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
7e705706 2469
0c9d65e7 2470 if (!IS_POSIXACL(dentry->d_inode))
916d2d84 2471 supp[0] &= ~FATTR4_WORD0_ACL;
18032ca0 2472 if (!contextsupport)
916d2d84
BF		 2473 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2474 if (!supp[2]) {
ddd1ea56
BF		 2475 p = xdr_reserve_space(xdr, 12);
2476 if (!p)
2b44f1ba 2477 goto out_resource;
c373b0a4 2478 *p++ = cpu_to_be32(2);
916d2d84
BF		 2479 *p++ = cpu_to_be32(supp[0]);
2480 *p++ = cpu_to_be32(supp[1]);
7e705706 2481 } else {
ddd1ea56
BF		 2482 p = xdr_reserve_space(xdr, 16);
2483 if (!p)
2b44f1ba 2484 goto out_resource;
c373b0a4 2485 *p++ = cpu_to_be32(3);
916d2d84
BF		 2486 *p++ = cpu_to_be32(supp[0]);
2487 *p++ = cpu_to_be32(supp[1]);
2488 *p++ = cpu_to_be32(supp[2]);
7e705706 2489 }
1da177e4
LT		 2490 }
2491 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2492 p = xdr_reserve_space(xdr, 4);
2493 if (!p)
1da177e4 2494 goto out_resource;
3d2544b1 2495 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2496 if (dummy == NF4BAD) {
2497 status = nfserr_serverfault;
2498 goto out;
2499 }
c373b0a4 2500 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2501 }
2502 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2503 p = xdr_reserve_space(xdr, 4);
2504 if (!p)
1da177e4 2505 goto out_resource;
49640001 2506 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2507 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2508 else
c373b0a4
BF		 2509 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2510 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2511 }
2512 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2513 p = xdr_reserve_space(xdr, 8);
2514 if (!p)
1da177e4 2515 goto out_resource;
b8800921 2516 p = encode_change(p, &stat, d_inode(dentry), exp);
1da177e4
LT		 2517 }
2518 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2519 p = xdr_reserve_space(xdr, 8);
2520 if (!p)
1da177e4 2521 goto out_resource;
b64c7f3b 2522 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2523 }
2524 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2525 p = xdr_reserve_space(xdr, 4);
2526 if (!p)
1da177e4 2527 goto out_resource;
c373b0a4 2528 *p++ = cpu_to_be32(1);
1da177e4
LT		 2529 }
2530 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2531 p = xdr_reserve_space(xdr, 4);
2532 if (!p)
1da177e4 2533 goto out_resource;
c373b0a4 2534 *p++ = cpu_to_be32(1);
1da177e4
LT		 2535 }
2536 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2537 p = xdr_reserve_space(xdr, 4);
2538 if (!p)
1da177e4 2539 goto out_resource;
c373b0a4 2540 *p++ = cpu_to_be32(0);
1da177e4
LT		 2541 }
2542 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2543 p = xdr_reserve_space(xdr, 16);
2544 if (!p)
1da177e4 2545 goto out_resource;
42ca0993 2546 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 2547 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2548 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2549 } else switch(fsid_source(fhp)) {
2550 case FSIDSOURCE_FSID:
b64c7f3b
BF		 2551 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2552 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 2553 break;
2554 case FSIDSOURCE_DEV:
c373b0a4
BF		 2555 *p++ = cpu_to_be32(0);
2556 *p++ = cpu_to_be32(MAJOR(stat.dev));
2557 *p++ = cpu_to_be32(0);
2558 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 2559 break;
2560 case FSIDSOURCE_UUID:
94eb3689
KM		 2561 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2562 EX_UUID_LEN);
af6a4e28 2563 break;
1da177e4
LT		 2564 }
2565 }
2566 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2567 p = xdr_reserve_space(xdr, 4);
2568 if (!p)
1da177e4 2569 goto out_resource;
c373b0a4 2570 *p++ = cpu_to_be32(0);
1da177e4
LT		 2571 }
2572 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2573 p = xdr_reserve_space(xdr, 4);
2574 if (!p)
1da177e4 2575 goto out_resource;
c373b0a4 2576 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 2577 }
2578 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2579 p = xdr_reserve_space(xdr, 4);
2580 if (!p)
1da177e4 2581 goto out_resource;
c373b0a4 2582 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 2583 }
2584 if (bmval0 & FATTR4_WORD0_ACL) {
2585 struct nfs4_ace *ace;
1da177e4
LT		 2586
2587 if (acl == NULL) {
ddd1ea56
BF		 2588 p = xdr_reserve_space(xdr, 4);
2589 if (!p)
1da177e4
LT		 2590 goto out_resource;
2591
c373b0a4 2592 *p++ = cpu_to_be32(0);
1da177e4
LT		 2593 goto out_acl;
2594 }
ddd1ea56
BF		 2595 p = xdr_reserve_space(xdr, 4);
2596 if (!p)
1da177e4 2597 goto out_resource;
c373b0a4 2598 *p++ = cpu_to_be32(acl->naces);
1da177e4 2599
28e05dd8 2600 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2601 p = xdr_reserve_space(xdr, 4*3);
2602 if (!p)
1da177e4 2603 goto out_resource;
c373b0a4
BF		 2604 *p++ = cpu_to_be32(ace->type);
2605 *p++ = cpu_to_be32(ace->flag);
2606 *p++ = cpu_to_be32(ace->access_mask &
2607 NFS4_ACE_MASK_ALL);
ddd1ea56 2608 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2609 if (status)
2610 goto out;
2611 }
2612 }
2613out_acl:
2614 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2615 p = xdr_reserve_space(xdr, 4);
2616 if (!p)
1da177e4 2617 goto out_resource;
0c9d65e7 2618 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
1da177e4
LT		 2619 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2620 }
2621 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2622 p = xdr_reserve_space(xdr, 4);
2623 if (!p)
1da177e4 2624 goto out_resource;
c373b0a4 2625 *p++ = cpu_to_be32(1);
1da177e4
LT		 2626 }
2627 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2628 p = xdr_reserve_space(xdr, 4);
2629 if (!p)
1da177e4 2630 goto out_resource;
c373b0a4 2631 *p++ = cpu_to_be32(0);
1da177e4
LT		 2632 }
2633 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2634 p = xdr_reserve_space(xdr, 4);
2635 if (!p)
1da177e4 2636 goto out_resource;
c373b0a4 2637 *p++ = cpu_to_be32(1);
1da177e4
LT		 2638 }
2639 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2640 p = xdr_reserve_space(xdr, 4);
2641 if (!p)
1da177e4 2642 goto out_resource;
c373b0a4 2643 *p++ = cpu_to_be32(1);
1da177e4
LT		 2644 }
2645 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2646 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2647 if (!p)
1da177e4 2648 goto out_resource;
0c0c267b
BF		 2649 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2650 fhp->fh_handle.fh_size);
1da177e4
LT		 2651 }
2652 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2653 p = xdr_reserve_space(xdr, 8);
2654 if (!p)
1da177e4 2655 goto out_resource;
b64c7f3b 2656 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 2657 }
2658 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2659 p = xdr_reserve_space(xdr, 8);
2660 if (!p)
1da177e4 2661 goto out_resource;
b64c7f3b 2662 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2663 }
2664 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2665 p = xdr_reserve_space(xdr, 8);
2666 if (!p)
1da177e4 2667 goto out_resource;
b64c7f3b 2668 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2669 }
2670 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2671 p = xdr_reserve_space(xdr, 8);
2672 if (!p)
1da177e4 2673 goto out_resource;
b64c7f3b 2674 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 2675 }
81c3f413 2676 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2677 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2678 if (status)
2679 goto out;
2680 }
1da177e4 2681 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2682 p = xdr_reserve_space(xdr, 4);
2683 if (!p)
1da177e4 2684 goto out_resource;
c373b0a4 2685 *p++ = cpu_to_be32(1);
1da177e4
LT		 2686 }
2687 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2688 p = xdr_reserve_space(xdr, 8);
2689 if (!p)
1da177e4 2690 goto out_resource;
b64c7f3b 2691 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2692 }
2693 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2694 p = xdr_reserve_space(xdr, 4);
2695 if (!p)
1da177e4 2696 goto out_resource;
c373b0a4 2697 *p++ = cpu_to_be32(255);
1da177e4
LT		 2698 }
2699 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2700 p = xdr_reserve_space(xdr, 4);
2701 if (!p)
1da177e4 2702 goto out_resource;
c373b0a4 2703 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 2704 }
2705 if (bmval0 & FATTR4_WORD0_MAXREAD) {
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) svc_max_payload(rqstp));
1da177e4
LT		 2710 }
2711 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
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) svc_max_payload(rqstp));
1da177e4
LT		 2716 }
2717 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2718 p = xdr_reserve_space(xdr, 4);
2719 if (!p)
1da177e4 2720 goto out_resource;
c373b0a4 2721 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 2722 }
2723 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2724 p = xdr_reserve_space(xdr, 4);
2725 if (!p)
1da177e4 2726 goto out_resource;
c373b0a4 2727 *p++ = cpu_to_be32(1);
1da177e4
LT		 2728 }
2729 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2730 p = xdr_reserve_space(xdr, 4);
2731 if (!p)
1da177e4 2732 goto out_resource;
c373b0a4 2733 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 2734 }
2735 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2736 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2737 if (status)
2738 goto out;
2739 }
2740 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2741 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2742 if (status)
2743 goto out;
2744 }
2745 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2746 p = xdr_reserve_space(xdr, 8);
2747 if (!p)
1da177e4 2748 goto out_resource;
c373b0a4
BF		 2749 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2750 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 2751 }
2752 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2753 p = xdr_reserve_space(xdr, 8);
2754 if (!p)
1da177e4
LT		 2755 goto out_resource;
2756 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 2757 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2758 }
2759 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2760 p = xdr_reserve_space(xdr, 8);
2761 if (!p)
1da177e4
LT		 2762 goto out_resource;
2763 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 2764 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2765 }
2766 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2767 p = xdr_reserve_space(xdr, 8);
2768 if (!p)
1da177e4
LT		 2769 goto out_resource;
2770 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 2771 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2772 }
2773 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2774 p = xdr_reserve_space(xdr, 8);
2775 if (!p)
1da177e4
LT		 2776 goto out_resource;
2777 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 2778 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2779 }
2780 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2781 p = xdr_reserve_space(xdr, 12);
2782 if (!p)
1da177e4 2783 goto out_resource;
b64c7f3b 2784 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 2785 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 2786 }
2787 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2788 p = xdr_reserve_space(xdr, 12);
2789 if (!p)
1da177e4 2790 goto out_resource;
c373b0a4
BF		 2791 *p++ = cpu_to_be32(0);
2792 *p++ = cpu_to_be32(1);
2793 *p++ = cpu_to_be32(0);
1da177e4
LT		 2794 }
2795 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2796 p = xdr_reserve_space(xdr, 12);
2797 if (!p)
1da177e4 2798 goto out_resource;
b64c7f3b 2799 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 2800 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 2801 }
2802 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2803 p = xdr_reserve_space(xdr, 12);
2804 if (!p)
1da177e4 2805 goto out_resource;
b64c7f3b 2806 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 2807 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 2808 }
2809 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
0a2050d7
KM		 2810 struct kstat parent_stat;
2811 u64 ino = stat.ino;
2812
ddd1ea56
BF		 2813 p = xdr_reserve_space(xdr, 8);
2814 if (!p)
1da177e4 2815 goto out_resource;
406a7ea9
FF		 2816 /*
2817 * Get parent's attributes if not ignoring crossmount
2818 * and this is the root of a cross-mounted filesystem.
2819 */
2820 if (ignore_crossmnt == 0 &&
0a2050d7
KM		 2821 dentry == exp->ex_path.mnt->mnt_root) {
2822 err = get_parent_attributes(exp, &parent_stat);
2823 if (err)
2824 goto out_nfserr;
2825 ino = parent_stat.ino;
2826 }
2827 p = xdr_encode_hyper(p, ino);
1da177e4 2828 }
9cf514cc 2829#ifdef CONFIG_NFSD_PNFS
6896f15a 2830 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
8a4c3926 2831 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 2832 if (status)
2833 goto out;
2834 }
2835
2836 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
8a4c3926 2837 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 2838 if (status)
2839 goto out;
9cf514cc
CH		 2840 }
2841
2842 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2843 p = xdr_reserve_space(xdr, 4);
2844 if (!p)
2845 goto out_resource;
2846 *p++ = cpu_to_be32(stat.blksize);
2847 }
2848#endif /* CONFIG_NFSD_PNFS */
8c18f205 2849 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
b26b78cb
TM		 2850 u32 supp[3];
2851
2852 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2853 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
2854 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
2855 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
2856
2857 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
75976de6
KM		 2858 if (status)
2859 goto out;
8c18f205 2860 }
7e705706 2861
7d580722
KM		 2862 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2863 status = nfsd4_encode_security_label(xdr, rqstp, context,
2864 contextlen);
2865 if (status)
2866 goto out;
2867 }
2868
082d4bd7
BF		 2869 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2870 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2871 status = nfs_ok;
2872
2873out:
ba4e55bb 2874#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2875 if (context)
2876 security_release_secctx(context, contextlen);
ba4e55bb 2877#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2878 kfree(acl);
18df11d0 2879 if (tempfh) {
d50e6136 2880 fh_put(tempfh);
18df11d0
YZ		 2881 kfree(tempfh);
2882 }
1fcea5b2
BF		 2883 if (status)
2884 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2885 return status;
2886out_nfserr:
b8dd7b9a 2887 status = nfserrno(err);
1da177e4
LT		 2888 goto out;
2889out_resource:
1da177e4
LT		 2890 status = nfserr_resource;
2891 goto out;
1da177e4
LT		 2892}
2893
2825a7f9
BF		 2894static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2895 struct xdr_buf *buf, __be32 *p, int bytes)
2896{
2897 xdr->scratch.iov_len = 0;
2898 memset(buf, 0, sizeof(struct xdr_buf));
2899 buf->head[0].iov_base = p;
2900 buf->head[0].iov_len = 0;
2901 buf->len = 0;
2902 xdr->buf = buf;
2903 xdr->iov = buf->head;
2904 xdr->p = p;
2905 xdr->end = (void *)p + bytes;
2906 buf->buflen = bytes;
2907}
2908
d5184658
BF		 2909__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2910 struct svc_fh *fhp, struct svc_export *exp,
2911 struct dentry *dentry, u32 *bmval,
2912 struct svc_rqst *rqstp, int ignore_crossmnt)
2913{
2825a7f9 2914 struct xdr_buf dummy;
d5184658
BF		 2915 struct xdr_stream xdr;
2916 __be32 ret;
2917
2825a7f9 2918 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2919 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2920 ignore_crossmnt);
2921 *p = xdr.p;
2922 return ret;
2923}
2924
c0ce6ec8
BF		 2925static inline int attributes_need_mount(u32 *bmval)
2926{
2927 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2928 return 1;
2929 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2930 return 1;
2931 return 0;
2932}
2933
b37ad28b 2934static __be32
561f0ed4
BF		 2935nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2936 const char *name, int namlen)
1da177e4
LT		 2937{
2938 struct svc_export *exp = cd->rd_fhp->fh_export;
2939 struct dentry *dentry;
b37ad28b 2940 __be32 nfserr;
406a7ea9 2941 int ignore_crossmnt = 0;
1da177e4 2942
bbddca8e 2943 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
1da177e4
LT		 2944 if (IS_ERR(dentry))
2945 return nfserrno(PTR_ERR(dentry));
2b0143b5 2946 if (d_really_is_negative(dentry)) {
b2c0cea6 2947 /*
bbddca8e
N		 2948 * we're not holding the i_mutex here, so there's
2949 * a window where this directory entry could have gone
2950 * away.
b2c0cea6
BF		 2951 */
2952 dput(dentry);
2953 return nfserr_noent;
2954 }
1da177e4
LT		 2955
2956 exp_get(exp);
406a7ea9
FF		 2957 /*
2958 * In the case of a mountpoint, the client may be asking for
2959 * attributes that are only properties of the underlying filesystem
2960 * as opposed to the cross-mounted file system. In such a case,
2961 * we will not follow the cross mount and will fill the attribtutes
2962 * directly from the mountpoint dentry.
2963 */
3227fa41 2964 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2965 int err;
2966
3227fa41
BF		 2967 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2968 && !attributes_need_mount(cd->rd_bmval)) {
2969 ignore_crossmnt = 1;
2970 goto out_encode;
2971 }
dcb488a3
AA		 2972 /*
2973 * Why the heck aren't we just using nfsd_lookup??
2974 * Different "."/".." handling? Something else?
2975 * At least, add a comment here to explain....
2976 */
021d3a72
BF		 2977 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2978 if (err) {
2979 nfserr = nfserrno(err);
1da177e4
LT		 2980 goto out_put;
2981 }
dcb488a3
AA		 2982 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2983 if (nfserr)
2984 goto out_put;
1da177e4
LT		 2985
2986 }
3227fa41 2987out_encode:
561f0ed4 2988 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 2989 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2990out_put:
2991 dput(dentry);
2992 exp_put(exp);
2993 return nfserr;
2994}
2995
2ebbc012 2996static __be32 *
561f0ed4 2997nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 2998{
561f0ed4
BF		 2999 __be32 *p;
3000
c3a45617 3001 p = xdr_reserve_space(xdr, 20);
561f0ed4 3002 if (!p)
1da177e4
LT		 3003 return NULL;
3004 *p++ = htonl(2);
3005 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
3006 *p++ = htonl(0); /* bmval1 */
3007
87915c64 3008 *p++ = htonl(4); /* attribute length */
1da177e4 3009 *p++ = nfserr; /* no htonl */
1da177e4
LT		 3010 return p;
3011}
3012
3013static int
a0ad13ef
N		 3014nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3015 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 3016{
a0ad13ef 3017 struct readdir_cd *ccd = ccdv;
1da177e4 3018 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 3019 struct xdr_stream *xdr = cd->xdr;
3020 int start_offset = xdr->buf->len;
3021 int cookie_offset;
aee37764 3022 u32 name_and_cookie;
561f0ed4 3023 int entry_bytes;
b37ad28b 3024 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 3025 __be64 wire_offset;
3026 __be32 *p;
1da177e4
LT		 3027
3028 /* In nfsv4, "." and ".." never make it onto the wire.. */
3029 if (name && isdotent(name, namlen)) {
3030 cd->common.err = nfs_ok;
3031 return 0;
3032 }
3033
561f0ed4
BF		 3034 if (cd->cookie_offset) {
3035 wire_offset = cpu_to_be64(offset);
3036 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3037 &wire_offset, 8);
3038 }
1da177e4 3039
561f0ed4
BF		 3040 p = xdr_reserve_space(xdr, 4);
3041 if (!p)
1da177e4 3042 goto fail;
1da177e4 3043 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 3044 cookie_offset = xdr->buf->len;
3045 p = xdr_reserve_space(xdr, 3*4 + namlen);
3046 if (!p)
3047 goto fail;
1da177e4
LT		 3048 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
3049 p = xdr_encode_array(p, name, namlen); /* name length & name */
3050
561f0ed4 3051 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 3052 switch (nfserr) {
3053 case nfs_ok:
1da177e4
LT		 3054 break;
3055 case nfserr_resource:
3056 nfserr = nfserr_toosmall;
3057 goto fail;
b2c0cea6 3058 case nfserr_noent:
f41c5ad2 3059 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 3060 goto skip_entry;
1da177e4
LT		 3061 default:
3062 /*
3063 * If the client requested the RDATTR_ERROR attribute,
3064 * we stuff the error code into this attribute
3065 * and continue. If this attribute was not requested,
3066 * then in accordance with the spec, we fail the
3067 * entire READDIR operation(!)
3068 */
3069 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3070 goto fail;
561f0ed4 3071 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 3072 if (p == NULL) {
3073 nfserr = nfserr_toosmall;
1da177e4 3074 goto fail;
34081efc 3075 }
1da177e4 3076 }
561f0ed4
BF		 3077 nfserr = nfserr_toosmall;
3078 entry_bytes = xdr->buf->len - start_offset;
3079 if (entry_bytes > cd->rd_maxcount)
3080 goto fail;
3081 cd->rd_maxcount -= entry_bytes;
aee37764
BF		 3082 /*
3083 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3084 * let's always let through the first entry, at least:
3085 */
0ec016e3
BF		 3086 if (!cd->rd_dircount)
3087 goto fail;
3088 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
aee37764
BF		 3089 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3090 goto fail;
3091 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
0ec016e3 3092
561f0ed4 3093 cd->cookie_offset = cookie_offset;
b2c0cea6 3094skip_entry:
1da177e4
LT		 3095 cd->common.err = nfs_ok;
3096 return 0;
3097fail:
561f0ed4 3098 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 3099 cd->common.err = nfserr;
3100 return -EINVAL;
3101}
3102
d0a381dd
BF		 3103static __be32
3104nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 3105{
bc749ca4 3106 __be32 *p;
e2f282b9 3107
d0a381dd
BF		 3108 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3109 if (!p)
3110 return nfserr_resource;
c373b0a4 3111 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 3112 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3113 sizeof(stateid_opaque_t));
d0a381dd 3114 return 0;
e2f282b9
BH		 3115}
3116
695e12f8 3117static __be32
b37ad28b 3118nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 3119{
d0a381dd 3120 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3121 __be32 *p;
1da177e4 3122
bac966d6
BF		 3123 p = xdr_reserve_space(xdr, 8);
3124 if (!p)
3125 return nfserr_resource;
3126 *p++ = cpu_to_be32(access->ac_supported);
3127 *p++ = cpu_to_be32(access->ac_resp_access);
3128 return 0;
1da177e4
LT		 3129}
3130
1d1bc8f2
BF		 3131static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3132{
d0a381dd 3133 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 3134 __be32 *p;
3135
bac966d6
BF		 3136 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3137 if (!p)
3138 return nfserr_resource;
3139 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3140 NFS4_MAX_SESSIONID_LEN);
3141 *p++ = cpu_to_be32(bcts->dir);
3142 /* Upshifting from TCP to RDMA is not supported */
3143 *p++ = cpu_to_be32(0);
3144 return 0;
1d1bc8f2
BF		 3145}
3146
695e12f8 3147static __be32
b37ad28b 3148nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 3149{
d0a381dd
BF		 3150 struct xdr_stream *xdr = &resp->xdr;
3151
bac966d6 3152 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
1da177e4
LT		 3153}
3154
3155
695e12f8 3156static __be32
b37ad28b 3157nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 3158{
d0a381dd 3159 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3160 __be32 *p;
1da177e4 3161
bac966d6
BF		 3162 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3163 if (!p)
3164 return nfserr_resource;
3165 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
0c0c267b 3166 NFS4_VERIFIER_SIZE);
bac966d6 3167 return 0;
1da177e4
LT		 3168}
3169
695e12f8 3170static __be32
b37ad28b 3171nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 3172{
d0a381dd 3173 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3174 __be32 *p;
1da177e4 3175
bac966d6
BF		 3176 p = xdr_reserve_space(xdr, 20);
3177 if (!p)
3178 return nfserr_resource;
3179 encode_cinfo(p, &create->cr_cinfo);
3180 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3181 create->cr_bmval[1], create->cr_bmval[2]);
3182 return 0;
1da177e4
LT		 3183}
3184
b37ad28b
AV		 3185static __be32
3186nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 3187{
3188 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 3189 struct xdr_stream *xdr = &resp->xdr;
1da177e4 3190
bac966d6
BF		 3191 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3192 getattr->ga_bmval, resp->rqstp, 0);
1da177e4
LT		 3193}
3194
695e12f8
BH		 3195static __be32
3196nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 3197{
d0a381dd 3198 struct xdr_stream *xdr = &resp->xdr;
695e12f8 3199 struct svc_fh *fhp = *fhpp;
1da177e4 3200 unsigned int len;
bc749ca4 3201 __be32 *p;
1da177e4 3202
bac966d6
BF		 3203 len = fhp->fh_handle.fh_size;
3204 p = xdr_reserve_space(xdr, len + 4);
3205 if (!p)
3206 return nfserr_resource;
3207 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3208 return 0;
1da177e4
LT		 3209}
3210
3211/*
3212* Including all fields other than the name, a LOCK4denied structure requires
3213* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3214*/
d0a381dd
BF		 3215static __be32
3216nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 3217{
7c13f344 3218 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 3219 __be32 *p;
1da177e4 3220
8c7424cf 3221again:
d0a381dd 3222 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 3223 if (!p) {
3224 /*
3225 * Don't fail to return the result just because we can't
3226 * return the conflicting open:
3227 */
3228 if (conf->len) {
f98bac5a 3229 kfree(conf->data);
8c7424cf
BF		 3230 conf->len = 0;
3231 conf->data = NULL;
3232 goto again;
3233 }
d0a381dd 3234 return nfserr_resource;
8c7424cf 3235 }
b64c7f3b
BF		 3236 p = xdr_encode_hyper(p, ld->ld_start);
3237 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 3238 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 3239 if (conf->len) {
0c0c267b
BF		 3240 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3241 p = xdr_encode_opaque(p, conf->data, conf->len);
f98bac5a 3242 kfree(conf->data);
1da177e4 3243 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 3244 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 3245 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 3246 }
d0a381dd 3247 return nfserr_denied;
1da177e4
LT		 3248}
3249
695e12f8 3250static __be32
b37ad28b 3251nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 3252{
d0a381dd
BF		 3253 struct xdr_stream *xdr = &resp->xdr;
3254
e2f282b9 3255 if (!nfserr)
d0a381dd 3256 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 3257 else if (nfserr == nfserr_denied)
d0a381dd 3258 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
f98bac5a 3259
695e12f8 3260 return nfserr;
1da177e4
LT		 3261}
3262
695e12f8 3263static __be32
b37ad28b 3264nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 3265{
d0a381dd
BF		 3266 struct xdr_stream *xdr = &resp->xdr;
3267
1da177e4 3268 if (nfserr == nfserr_denied)
d0a381dd 3269 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 3270 return nfserr;
1da177e4
LT		 3271}
3272
695e12f8 3273static __be32
b37ad28b 3274nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 3275{
d0a381dd
BF		 3276 struct xdr_stream *xdr = &resp->xdr;
3277
bac966d6 3278 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
1da177e4
LT		 3279}
3280
3281
695e12f8 3282static __be32
b37ad28b 3283nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 3284{
d0a381dd 3285 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3286 __be32 *p;
1da177e4 3287
bac966d6
BF		 3288 p = xdr_reserve_space(xdr, 20);
3289 if (!p)
3290 return nfserr_resource;
3291 p = encode_cinfo(p, &link->li_cinfo);
3292 return 0;
1da177e4
LT		 3293}
3294
3295
695e12f8 3296static __be32
b37ad28b 3297nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 3298{
d0a381dd 3299 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3300 __be32 *p;
1da177e4 3301
d0a381dd
BF		 3302 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3303 if (nfserr)
bac966d6 3304 return nfserr;
75976de6 3305 p = xdr_reserve_space(xdr, 24);
d0a381dd
BF		 3306 if (!p)
3307 return nfserr_resource;
d05d5744 3308 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4 3309 *p++ = cpu_to_be32(open->op_rflags);
1da177e4 3310
75976de6
KM		 3311 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3312 open->op_bmval[2]);
3313 if (nfserr)
bac966d6 3314 return nfserr;
75976de6
KM		 3315
3316 p = xdr_reserve_space(xdr, 4);
3317 if (!p)
3318 return nfserr_resource;
3319
3320 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 3321 switch (open->op_delegate_type) {
3322 case NFS4_OPEN_DELEGATE_NONE:
3323 break;
3324 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 3325 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3326 if (nfserr)
3327 return nfserr;
3328 p = xdr_reserve_space(xdr, 20);
3329 if (!p)
3330 return nfserr_resource;
c373b0a4 3331 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 3332
3333 /*
3334 * TODO: ACE's in delegations
3335 */
c373b0a4
BF		 3336 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3337 *p++ = cpu_to_be32(0);
3338 *p++ = cpu_to_be32(0);
3339 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 3340 break;
3341 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 3342 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3343 if (nfserr)
3344 return nfserr;
3345 p = xdr_reserve_space(xdr, 32);
3346 if (!p)
3347 return nfserr_resource;
c373b0a4 3348 *p++ = cpu_to_be32(0);
1da177e4
LT		 3349
3350 /*
3351 * TODO: space_limit's in delegations
3352 */
c373b0a4
BF		 3353 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3354 *p++ = cpu_to_be32(~(u32)0);
3355 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3356
3357 /*
3358 * TODO: ACE's in delegations
3359 */
c373b0a4
BF		 3360 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3361 *p++ = cpu_to_be32(0);
3362 *p++ = cpu_to_be32(0);
3363 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3364 break;
d24433cd
BH		 3365 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3366 switch (open->op_why_no_deleg) {
3367 case WND4_CONTENTION:
3368 case WND4_RESOURCE:
d0a381dd
BF		 3369 p = xdr_reserve_space(xdr, 8);
3370 if (!p)
3371 return nfserr_resource;
c373b0a4
BF		 3372 *p++ = cpu_to_be32(open->op_why_no_deleg);
3373 /* deleg signaling not supported yet: */
3374 *p++ = cpu_to_be32(0);
d24433cd
BH		 3375 break;
3376 default:
d0a381dd
BF		 3377 p = xdr_reserve_space(xdr, 4);
3378 if (!p)
3379 return nfserr_resource;
c373b0a4 3380 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3381 }
d24433cd 3382 break;
1da177e4
LT		 3383 default:
3384 BUG();
3385 }
3386 /* XXX save filehandle here */
bac966d6 3387 return 0;
1da177e4
LT		 3388}
3389
695e12f8 3390static __be32
b37ad28b 3391nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3392{
d0a381dd
BF		 3393 struct xdr_stream *xdr = &resp->xdr;
3394
bac966d6 3395 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4
LT		 3396}
3397
695e12f8 3398static __be32
b37ad28b 3399nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3400{
d0a381dd
BF		 3401 struct xdr_stream *xdr = &resp->xdr;
3402
bac966d6 3403 return nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4
LT		 3404}
3405
dc97618d
BF		 3406static __be32 nfsd4_encode_splice_read(
3407 struct nfsd4_compoundres *resp,
3408 struct nfsd4_read *read,
3409 struct file *file, unsigned long maxcount)
1da177e4 3410{
ddd1ea56 3411 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3412 struct xdr_buf *buf = xdr->buf;
dc97618d 3413 u32 eof;
ac503e4a 3414 long len;
30596768 3415 int space_left;
dc97618d 3416 __be32 nfserr;
fec25fa4 3417 __be32 *p = xdr->p - 2;
1da177e4 3418
d5d5c304
KM		 3419 /* Make sure there will be room for padding if needed */
3420 if (xdr->end - xdr->p < 1)
d0a381dd 3421 return nfserr_resource;
dc97618d 3422
ac503e4a 3423 len = maxcount;
dc97618d
BF		 3424 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3425 read->rd_offset, &maxcount);
3426 if (nfserr) {
3427 /*
3428 * nfsd_splice_actor may have already messed with the
3429 * page length; reset it so as not to confuse
3430 * xdr_truncate_encode:
3431 */
34a78b48 3432 buf->page_len = 0;
dc97618d 3433 return nfserr;
b0e35fda 3434 }
1da177e4 3435
ac503e4a
BC		 3436 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3437 d_inode(read->rd_fhp->fh_dentry)->i_size);
4e21ac4b 3438
fec25fa4
BF		 3439 *(p++) = htonl(eof);
3440 *(p++) = htonl(maxcount);
dc97618d 3441
34a78b48
BF		 3442 buf->page_len = maxcount;
3443 buf->len += maxcount;
15b23ef5
BF		 3444 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3445 / PAGE_SIZE;
dc97618d
BF		 3446
3447 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3448 buf->tail[0].iov_base = xdr->p;
3449 buf->tail[0].iov_len = 0;
fec25fa4 3450 xdr->iov = buf->tail;
dc97618d 3451 if (maxcount&3) {
fec25fa4
BF		 3452 int pad = 4 - (maxcount&3);
3453
3454 *(xdr->p++) = 0;
3455
34a78b48 3456 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3457 buf->tail[0].iov_len = pad;
3458 buf->len += pad;
b0e35fda 3459 }
2825a7f9 3460
dc97618d 3461 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3462 buf->buflen - buf->len);
3463 buf->buflen = buf->len + space_left;
dc97618d
BF		 3464 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3465
3466 return 0;
3467}
3468
3469static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3470 struct nfsd4_read *read,
3471 struct file *file, unsigned long maxcount)
3472{
3473 struct xdr_stream *xdr = &resp->xdr;
3474 u32 eof;
3475 int v;
dc97618d 3476 int starting_len = xdr->buf->len - 8;
dc97618d 3477 long len;
b0420980 3478 int thislen;
dc97618d
BF		 3479 __be32 nfserr;
3480 __be32 tmp;
3481 __be32 *p;
b0420980
BF		 3482 u32 zzz = 0;
3483 int pad;
1da177e4
LT		 3484
3485 len = maxcount;
3486 v = 0;
6ff9897d 3487
1055414f 3488 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
b0420980
BF		 3489 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3490 WARN_ON_ONCE(!p);
3491 resp->rqstp->rq_vec[v].iov_base = p;
3492 resp->rqstp->rq_vec[v].iov_len = thislen;
3493 v++;
3494 len -= thislen;
3495
3496 while (len) {
6ff9897d 3497 thislen = min_t(long, len, PAGE_SIZE);
b0420980
BF		 3498 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3499 WARN_ON_ONCE(!p);
3500 resp->rqstp->rq_vec[v].iov_base = p;
6ff9897d 3501 resp->rqstp->rq_vec[v].iov_len = thislen;
1da177e4 3502 v++;
6ff9897d 3503 len -= thislen;
1da177e4
LT		 3504 }
3505 read->rd_vlen = v;
3506
ac503e4a 3507 len = maxcount;
dc97618d
BF		 3508 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3509 read->rd_vlen, &maxcount);
3510 if (nfserr)
1da177e4 3511 return nfserr;
b0420980 3512 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
dc97618d 3513
ac503e4a
BC		 3514 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3515 d_inode(read->rd_fhp->fh_dentry)->i_size);
1da177e4 3516
dc97618d
BF		 3517 tmp = htonl(eof);
3518 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3519 tmp = htonl(maxcount);
3520 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3521
b0420980
BF		 3522 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3523 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3524 &zzz, pad);
1da177e4 3525 return 0;
dc97618d
BF		 3526
3527}
3528
3529static __be32
3530nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3531 struct nfsd4_read *read)
3532{
3533 unsigned long maxcount;
3534 struct xdr_stream *xdr = &resp->xdr;
3535 struct file *file = read->rd_filp;
3536 int starting_len = xdr->buf->len;
e749a462 3537 struct raparms *ra = NULL;
dc97618d 3538 __be32 *p;
dc97618d 3539
dc97618d
BF		 3540 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3541 if (!p) {
779fb0f3 3542 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
bac966d6 3543 return nfserr_resource;
dc97618d 3544 }
68e8bb03
CH		 3545 if (resp->xdr.buf->page_len &&
3546 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
b0420980 3547 WARN_ON_ONCE(1);
bac966d6 3548 return nfserr_resource;
dc97618d 3549 }
dc97618d
BF		 3550 xdr_commit_encode(xdr);
3551
3552 maxcount = svc_max_payload(resp->rqstp);
68e8bb03
CH		 3553 maxcount = min_t(unsigned long, maxcount,
3554 (xdr->buf->buflen - xdr->buf->len));
3c7aa15d 3555 maxcount = min_t(unsigned long, maxcount, read->rd_length);
dc97618d 3556
af90f707 3557 if (read->rd_tmp_file)
e749a462 3558 ra = nfsd_init_raparms(file);
dc97618d 3559
68e8bb03
CH		 3560 if (file->f_op->splice_read &&
3561 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
96bcad50 3562 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
dc97618d 3563 else
96bcad50 3564 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
dc97618d 3565
e749a462
CH		 3566 if (ra)
3567 nfsd_put_raparams(file, ra);
dc97618d 3568
96bcad50 3569 if (nfserr)
dc97618d 3570 xdr_truncate_encode(xdr, starting_len);
96bcad50 3571
96bcad50 3572 return nfserr;
1da177e4
LT		 3573}
3574
b37ad28b
AV		 3575static __be32
3576nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3577{
3578 int maxcount;
476a7b1f
BF		 3579 __be32 wire_count;
3580 int zero = 0;
ddd1ea56 3581 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3582 int length_offset = xdr->buf->len;
bc749ca4 3583 __be32 *p;
1da177e4 3584
2825a7f9
BF		 3585 p = xdr_reserve_space(xdr, 4);
3586 if (!p)
3587 return nfserr_resource;
1da177e4 3588 maxcount = PAGE_SIZE;
d0a381dd 3589
476a7b1f
BF		 3590 p = xdr_reserve_space(xdr, maxcount);
3591 if (!p)
4e21ac4b 3592 return nfserr_resource;
1da177e4 3593 /*
fd4a0edf
MS		 3594 * XXX: By default, vfs_readlink() will truncate symlinks if they
3595 * would overflow the buffer. Is this kosher in NFSv4? If not, one
3596 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
3597 * that truncation occurred, and return NFS4ERR_RESOURCE.
1da177e4 3598 */
476a7b1f
BF		 3599 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3600 (char *)p, &maxcount);
1da177e4 3601 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3602 nfserr = nfserr_inval;
3603 if (nfserr) {
1fcea5b2 3604 xdr_truncate_encode(xdr, length_offset);
1da177e4 3605 return nfserr;
d3f627c8 3606 }
1da177e4 3607
476a7b1f
BF		 3608 wire_count = htonl(maxcount);
3609 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
69bbd9c7 3610 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
476a7b1f
BF		 3611 if (maxcount & 3)
3612 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3613 &zero, 4 - (maxcount&3));
1da177e4
LT		 3614 return 0;
3615}
3616
b37ad28b
AV		 3617static __be32
3618nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3619{
3620 int maxcount;
561f0ed4 3621 int bytes_left;
1da177e4 3622 loff_t offset;
561f0ed4 3623 __be64 wire_offset;
ddd1ea56 3624 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3625 int starting_len = xdr->buf->len;
bc749ca4 3626 __be32 *p;
1da177e4 3627
d0a381dd
BF		 3628 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3629 if (!p)
3630 return nfserr_resource;
1da177e4
LT		 3631
3632 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 3633 *p++ = cpu_to_be32(0);
3634 *p++ = cpu_to_be32(0);
4aea24b2
BF		 3635 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3636 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3637
3638 /*
561f0ed4
BF		 3639 * Number of bytes left for directory entries allowing for the
3640 * final 8 bytes of the readdir and a following failed op:
3641 */
3642 bytes_left = xdr->buf->buflen - xdr->buf->len
3643 - COMPOUND_ERR_SLACK_SPACE - 8;
3644 if (bytes_left < 0) {
3645 nfserr = nfserr_resource;
3646 goto err_no_verf;
3647 }
3648 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3649 /*
3650 * Note the rfc defines rd_maxcount as the size of the
3651 * READDIR4resok structure, which includes the verifier above
3652 * and the 8 bytes encoded at the end of this function:
1da177e4 3653 */
561f0ed4
BF		 3654 if (maxcount < 16) {
3655 nfserr = nfserr_toosmall;
1da177e4
LT		 3656 goto err_no_verf;
3657 }
561f0ed4 3658 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3659
aee37764
BF		 3660 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3661 if (!readdir->rd_dircount)
3662 readdir->rd_dircount = INT_MAX;
3663
561f0ed4
BF		 3664 readdir->xdr = xdr;
3665 readdir->rd_maxcount = maxcount;
1da177e4 3666 readdir->common.err = 0;
561f0ed4 3667 readdir->cookie_offset = 0;
1da177e4
LT		 3668
3669 offset = readdir->rd_cookie;
3670 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3671 &offset,
3672 &readdir->common, nfsd4_encode_dirent);
3673 if (nfserr == nfs_ok &&
3674 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3675 xdr->buf->len == starting_len + 8) {
3676 /* nothing encoded; which limit did we hit?: */
3677 if (maxcount - 16 < bytes_left)
3678 /* It was the fault of rd_maxcount: */
3679 nfserr = nfserr_toosmall;
3680 else
3681 /* We ran out of buffer space: */
3682 nfserr = nfserr_resource;
3683 }
1da177e4
LT		 3684 if (nfserr)
3685 goto err_no_verf;
3686
561f0ed4
BF		 3687 if (readdir->cookie_offset) {
3688 wire_offset = cpu_to_be64(offset);
3689 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3690 &wire_offset, 8);
3691 }
1da177e4 3692
561f0ed4
BF		 3693 p = xdr_reserve_space(xdr, 8);
3694 if (!p) {
3695 WARN_ON_ONCE(1);
3696 goto err_no_verf;
3697 }
1da177e4
LT		 3698 *p++ = 0; /* no more entries */
3699 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3700
3701 return 0;
3702err_no_verf:
1fcea5b2 3703 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3704 return nfserr;
3705}
3706
695e12f8 3707static __be32
b37ad28b 3708nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3709{
d0a381dd 3710 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3711 __be32 *p;
1da177e4 3712
bac966d6
BF		 3713 p = xdr_reserve_space(xdr, 20);
3714 if (!p)
3715 return nfserr_resource;
3716 p = encode_cinfo(p, &remove->rm_cinfo);
3717 return 0;
1da177e4
LT		 3718}
3719
695e12f8 3720static __be32
b37ad28b 3721nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3722{
d0a381dd 3723 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3724 __be32 *p;
1da177e4 3725
bac966d6
BF		 3726 p = xdr_reserve_space(xdr, 40);
3727 if (!p)
3728 return nfserr_resource;
3729 p = encode_cinfo(p, &rename->rn_sinfo);
3730 p = encode_cinfo(p, &rename->rn_tinfo);
3731 return 0;
1da177e4
LT		 3732}
3733
695e12f8 3734static __be32
bac966d6 3735nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
dcb488a3 3736{
676e4ebd 3737 u32 i, nflavs, supported;
4796f457
BF		 3738 struct exp_flavor_info *flavs;
3739 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3740 __be32 *p, *flavorsp;
3741 static bool report = true;
dcb488a3 3742
4796f457
BF		 3743 if (exp->ex_nflavors) {
3744 flavs = exp->ex_flavors;
3745 nflavs = exp->ex_nflavors;
3746 } else { /* Handling of some defaults in absence of real secinfo: */
3747 flavs = def_flavs;
3748 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3749 nflavs = 2;
3750 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3751 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3752 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3753 nflavs = 1;
3754 flavs[0].pseudoflavor
3755 = svcauth_gss_flavor(exp->ex_client);
3756 } else {
3757 nflavs = 1;
3758 flavs[0].pseudoflavor
3759 = exp->ex_client->flavour->flavour;
3760 }
3761 }
3762
676e4ebd 3763 supported = 0;
d0a381dd
BF		 3764 p = xdr_reserve_space(xdr, 4);
3765 if (!p)
bac966d6 3766 return nfserr_resource;
676e4ebd 3767 flavorsp = p++; /* to be backfilled later */
676e4ebd 3768
4796f457 3769 for (i = 0; i < nflavs; i++) {
676e4ebd 3770 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3771 struct rpcsec_gss_info info;
dcb488a3 3772
676e4ebd
CL		 3773 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3774 supported++;
d0a381dd
BF		 3775 p = xdr_reserve_space(xdr, 4 + 4 +
3776 XDR_LEN(info.oid.len) + 4 + 4);
3777 if (!p)
bac966d6 3778 return nfserr_resource;
c373b0a4 3779 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 3780 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 3781 *p++ = cpu_to_be32(info.qop);
3782 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 3783 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3784 supported++;
d0a381dd
BF		 3785 p = xdr_reserve_space(xdr, 4);
3786 if (!p)
bac966d6 3787 return nfserr_resource;
c373b0a4 3788 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 3789 } else {
3790 if (report)
3791 pr_warn("NFS: SECINFO: security flavor %u "
3792 "is not supported\n", pf);
dcb488a3
AA		 3793 }
3794 }
a77c806f 3795
676e4ebd
CL		 3796 if (nflavs != supported)
3797 report = false;
3798 *flavorsp = htonl(supported);
bac966d6 3799 return 0;
dcb488a3
AA		 3800}
3801
22b6dee8
MJ		 3802static __be32
3803nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3804 struct nfsd4_secinfo *secinfo)
3805{
d0a381dd
BF		 3806 struct xdr_stream *xdr = &resp->xdr;
3807
bac966d6 3808 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
22b6dee8
MJ		 3809}
3810
3811static __be32
3812nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3813 struct nfsd4_secinfo_no_name *secinfo)
3814{
d0a381dd
BF		 3815 struct xdr_stream *xdr = &resp->xdr;
3816
bac966d6 3817 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
22b6dee8
MJ		 3818}
3819
1da177e4
LT		 3820/*
3821 * The SETATTR encode routine is special -- it always encodes a bitmap,
3822 * regardless of the error status.
3823 */
695e12f8 3824static __be32
b37ad28b 3825nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3826{
d0a381dd 3827 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3828 __be32 *p;
1da177e4 3829
d0a381dd
BF		 3830 p = xdr_reserve_space(xdr, 16);
3831 if (!p)
3832 return nfserr_resource;
1da177e4 3833 if (nfserr) {
c373b0a4
BF		 3834 *p++ = cpu_to_be32(3);
3835 *p++ = cpu_to_be32(0);
3836 *p++ = cpu_to_be32(0);
3837 *p++ = cpu_to_be32(0);
1da177e4
LT		 3838 }
3839 else {
c373b0a4
BF		 3840 *p++ = cpu_to_be32(3);
3841 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3842 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3843 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 3844 }
695e12f8 3845 return nfserr;
1da177e4
LT		 3846}
3847
695e12f8 3848static __be32
b37ad28b 3849nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3850{
d0a381dd 3851 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3852 __be32 *p;
1da177e4
LT		 3853
3854 if (!nfserr) {
d0a381dd
BF		 3855 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3856 if (!p)
3857 return nfserr_resource;
0c0c267b
BF		 3858 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3859 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3860 NFS4_VERIFIER_SIZE);
1da177e4
LT		 3861 }
3862 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3863 p = xdr_reserve_space(xdr, 8);
3864 if (!p)
3865 return nfserr_resource;
c373b0a4
BF		 3866 *p++ = cpu_to_be32(0);
3867 *p++ = cpu_to_be32(0);
1da177e4 3868 }
695e12f8 3869 return nfserr;
1da177e4
LT		 3870}
3871
695e12f8 3872static __be32
b37ad28b 3873nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3874{
d0a381dd 3875 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3876 __be32 *p;
1da177e4 3877
bac966d6
BF		 3878 p = xdr_reserve_space(xdr, 16);
3879 if (!p)
3880 return nfserr_resource;
3881 *p++ = cpu_to_be32(write->wr_bytes_written);
3882 *p++ = cpu_to_be32(write->wr_how_written);
3883 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3884 NFS4_VERIFIER_SIZE);
3885 return 0;
1da177e4
LT		 3886}
3887
2db134eb 3888static __be32
57b7b43b 3889nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3890 struct nfsd4_exchange_id *exid)
3891{
d0a381dd 3892 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3893 __be32 *p;
0733d213
AA		 3894 char *major_id;
3895 char *server_scope;
3896 int major_id_sz;
3897 int server_scope_sz;
3898 uint64_t minor_id = 0;
3899
0733d213
AA		 3900 major_id = utsname()->nodename;
3901 major_id_sz = strlen(major_id);
3902 server_scope = utsname()->nodename;
3903 server_scope_sz = strlen(server_scope);
3904
d0a381dd 3905 p = xdr_reserve_space(xdr,
0733d213
AA		 3906 8 /* eir_clientid */ +
3907 4 /* eir_sequenceid */ +
3908 4 /* eir_flags */ +
a8bb84bc 3909 4 /* spr_how */);
d0a381dd
BF		 3910 if (!p)
3911 return nfserr_resource;
0733d213 3912
0c0c267b 3913 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 3914 *p++ = cpu_to_be32(exid->seqid);
3915 *p++ = cpu_to_be32(exid->flags);
0733d213 3916
c373b0a4 3917 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 3918
57266a6e
BF		 3919 switch (exid->spa_how) {
3920 case SP4_NONE:
3921 break;
3922 case SP4_MACH_CRED:
3923 /* spo_must_enforce bitmap: */
bac966d6 3924 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 3925 exid->spo_must_enforce[0],
3926 exid->spo_must_enforce[1],
3927 exid->spo_must_enforce[2]);
bac966d6
BF		 3928 if (nfserr)
3929 return nfserr;
ed941643 3930 /* spo_must_allow bitmap: */
bac966d6 3931 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 3932 exid->spo_must_allow[0],
3933 exid->spo_must_allow[1],
3934 exid->spo_must_allow[2]);
bac966d6
BF		 3935 if (nfserr)
3936 return nfserr;
57266a6e
BF		 3937 break;
3938 default:
3939 WARN_ON_ONCE(1);
3940 }
0733d213 3941
d0a381dd 3942 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3943 8 /* so_minor_id */ +
3944 4 /* so_major_id.len */ +
3945 (XDR_QUADLEN(major_id_sz) * 4) +
3946 4 /* eir_server_scope.len */ +
3947 (XDR_QUADLEN(server_scope_sz) * 4) +
3948 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3949 if (!p)
3950 return nfserr_resource;
a8bb84bc 3951
0733d213 3952 /* The server_owner struct */
b64c7f3b 3953 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 3954 /* major id */
0c0c267b 3955 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 3956
3957 /* Server scope */
0c0c267b 3958 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 3959
3960 /* Implementation id */
c373b0a4 3961 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 3962 return 0;
2db134eb
AA		 3963}
3964
3965static __be32
57b7b43b 3966nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3967 struct nfsd4_create_session *sess)
3968{
d0a381dd 3969 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3970 __be32 *p;
ec6b5d7b 3971
d0a381dd
BF		 3972 p = xdr_reserve_space(xdr, 24);
3973 if (!p)
3974 return nfserr_resource;
0c0c267b
BF		 3975 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3976 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3977 *p++ = cpu_to_be32(sess->seqid);
3978 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 3979
d0a381dd
BF		 3980 p = xdr_reserve_space(xdr, 28);
3981 if (!p)
3982 return nfserr_resource;
c373b0a4
BF		 3983 *p++ = cpu_to_be32(0); /* headerpadsz */
3984 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3985 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3986 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3987 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3988 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3989 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3990
3991 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 3992 p = xdr_reserve_space(xdr, 4);
3993 if (!p)
3994 return nfserr_resource;
c373b0a4 3995 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 3996 }
3997
d0a381dd
BF		 3998 p = xdr_reserve_space(xdr, 28);
3999 if (!p)
4000 return nfserr_resource;
c373b0a4
BF		 4001 *p++ = cpu_to_be32(0); /* headerpadsz */
4002 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4003 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4004 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4005 *p++ = cpu_to_be32(sess->back_channel.maxops);
4006 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4007 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4008
4009 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 4010 p = xdr_reserve_space(xdr, 4);
4011 if (!p)
4012 return nfserr_resource;
c373b0a4 4013 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 4014 }
4015 return 0;
2db134eb
AA		 4016}
4017
c47d832b 4018static __be32
57b7b43b 4019nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4020 struct nfsd4_sequence *seq)
4021{
d0a381dd 4022 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4023 __be32 *p;
b85d4c01 4024
d0a381dd
BF		 4025 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4026 if (!p)
4027 return nfserr_resource;
0c0c267b
BF		 4028 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4029 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4030 *p++ = cpu_to_be32(seq->seqid);
4031 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 4032 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 4033 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4034 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4035 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 4036
f5236013 4037 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 4038 return 0;
2db134eb
AA		 4039}
4040
2355c596 4041static __be32
57b7b43b 4042nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 4043 struct nfsd4_test_stateid *test_stateid)
4044{
d0a381dd 4045 struct xdr_stream *xdr = &resp->xdr;
03cfb420 4046 struct nfsd4_test_stateid_id *stateid, *next;
17456804 4047 __be32 *p;
17456804 4048
d0a381dd
BF		 4049 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4050 if (!p)
4051 return nfserr_resource;
17456804 4052 *p++ = htonl(test_stateid->ts_num_ids);
17456804 4053
03cfb420 4054 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 4055 *p++ = stateid->ts_id_status;
17456804 4056 }
17456804 4057
bac966d6 4058 return 0;
17456804
BS		 4059}
4060
9cf514cc
CH		 4061#ifdef CONFIG_NFSD_PNFS
4062static __be32
4063nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4064 struct nfsd4_getdeviceinfo *gdev)
4065{
4066 struct xdr_stream *xdr = &resp->xdr;
f961e3f2 4067 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4068 u32 starting_len = xdr->buf->len, needed_len;
4069 __be32 *p;
4070
9cf514cc
CH		 4071 p = xdr_reserve_space(xdr, 4);
4072 if (!p)
bac966d6 4073 return nfserr_resource;
9cf514cc
CH		 4074
4075 *p++ = cpu_to_be32(gdev->gd_layout_type);
4076
4077 /* If maxcount is 0 then just update notifications */
4078 if (gdev->gd_maxcount != 0) {
f961e3f2 4079 ops = nfsd4_layout_ops[gdev->gd_layout_type];
9cf514cc
CH		 4080 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4081 if (nfserr) {
4082 /*
4083 * We don't bother to burden the layout drivers with
4084 * enforcing gd_maxcount, just tell the client to
4085 * come back with a bigger buffer if it's not enough.
4086 */
4087 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4088 goto toosmall;
bac966d6 4089 return nfserr;
9cf514cc
CH		 4090 }
4091 }
4092
9cf514cc
CH		 4093 if (gdev->gd_notify_types) {
4094 p = xdr_reserve_space(xdr, 4 + 4);
4095 if (!p)
bac966d6 4096 return nfserr_resource;
9cf514cc
CH		 4097 *p++ = cpu_to_be32(1); /* bitmap length */
4098 *p++ = cpu_to_be32(gdev->gd_notify_types);
4099 } else {
4100 p = xdr_reserve_space(xdr, 4);
4101 if (!p)
bac966d6 4102 return nfserr_resource;
9cf514cc
CH		 4103 *p++ = 0;
4104 }
4105
bac966d6 4106 return 0;
9cf514cc
CH		 4107toosmall:
4108 dprintk("%s: maxcount too small\n", __func__);
4109 needed_len = xdr->buf->len + 4 /* notifications */;
4110 xdr_truncate_encode(xdr, starting_len);
4111 p = xdr_reserve_space(xdr, 4);
bac966d6
BF		 4112 if (!p)
4113 return nfserr_resource;
4114 *p++ = cpu_to_be32(needed_len);
4115 return nfserr_toosmall;
9cf514cc
CH		 4116}
4117
4118static __be32
4119nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4120 struct nfsd4_layoutget *lgp)
4121{
4122 struct xdr_stream *xdr = &resp->xdr;
f961e3f2 4123 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4124 __be32 *p;
4125
9cf514cc
CH		 4126 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4127 if (!p)
bac966d6 4128 return nfserr_resource;
9cf514cc
CH		 4129
4130 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4131 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4132 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4133 sizeof(stateid_opaque_t));
4134
4135 *p++ = cpu_to_be32(1); /* we always return a single layout */
4136 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4137 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4138 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4139 *p++ = cpu_to_be32(lgp->lg_layout_type);
4140
f961e3f2 4141 ops = nfsd4_layout_ops[lgp->lg_layout_type];
bac966d6 4142 return ops->encode_layoutget(xdr, lgp);
9cf514cc
CH		 4143}
4144
4145static __be32
4146nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4147 struct nfsd4_layoutcommit *lcp)
4148{
4149 struct xdr_stream *xdr = &resp->xdr;
4150 __be32 *p;
4151
9cf514cc
CH		 4152 p = xdr_reserve_space(xdr, 4);
4153 if (!p)
4154 return nfserr_resource;
4155 *p++ = cpu_to_be32(lcp->lc_size_chg);
4156 if (lcp->lc_size_chg) {
4157 p = xdr_reserve_space(xdr, 8);
4158 if (!p)
4159 return nfserr_resource;
4160 p = xdr_encode_hyper(p, lcp->lc_newsize);
4161 }
4162
bac966d6 4163 return 0;
9cf514cc
CH		 4164}
4165
4166static __be32
4167nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4168 struct nfsd4_layoutreturn *lrp)
4169{
4170 struct xdr_stream *xdr = &resp->xdr;
4171 __be32 *p;
4172
9cf514cc
CH		 4173 p = xdr_reserve_space(xdr, 4);
4174 if (!p)
4175 return nfserr_resource;
4176 *p++ = cpu_to_be32(lrp->lrs_present);
4177 if (lrp->lrs_present)
376675da 4178 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
bac966d6 4179 return 0;
9cf514cc
CH		 4180}
4181#endif /* CONFIG_NFSD_PNFS */
4182
29ae7f9d
AS		 4183static __be32
4184nfsd42_encode_write_res(struct nfsd4_compoundres *resp, struct nfsd42_write_res *write)
4185{
4186 __be32 *p;
4187
4188 p = xdr_reserve_space(&resp->xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE);
4189 if (!p)
4190 return nfserr_resource;
4191
4192 *p++ = cpu_to_be32(0);
4193 p = xdr_encode_hyper(p, write->wr_bytes_written);
4194 *p++ = cpu_to_be32(write->wr_stable_how);
4195 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4196 NFS4_VERIFIER_SIZE);
4197 return nfs_ok;
4198}
4199
4200static __be32
4201nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4202 struct nfsd4_copy *copy)
4203{
4204 __be32 *p;
4205
bac966d6
BF		 4206 nfserr = nfsd42_encode_write_res(resp, &copy->cp_res);
4207 if (nfserr)
4208 return nfserr;
29ae7f9d 4209
bac966d6
BF		 4210 p = xdr_reserve_space(&resp->xdr, 4 + 4);
4211 *p++ = cpu_to_be32(copy->cp_consecutive);
4212 *p++ = cpu_to_be32(copy->cp_synchronous);
4213 return 0;
29ae7f9d
AS		 4214}
4215
24bab491
AS		 4216static __be32
4217nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4218 struct nfsd4_seek *seek)
4219{
4220 __be32 *p;
4221
24bab491
AS		 4222 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4223 *p++ = cpu_to_be32(seek->seek_eof);
4224 p = xdr_encode_hyper(p, seek->seek_pos);
4225
bac966d6 4226 return 0;
24bab491
AS		 4227}
4228
695e12f8
BH		 4229static __be32
4230nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4231{
4232 return nfserr;
4233}
4234
4235typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4236
2db134eb
AA		 4237/*
4238 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4239 * since we don't need to filter out obsolete ops as this is
4240 * done in the decoding phase.
4241 */
c1df609d 4242static const nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 4243 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4244 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4245 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4246 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4247 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4248 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4249 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4250 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4251 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4252 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4253 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4254 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4255 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4256 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4257 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4258 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 4259 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 4260 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4261 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4262 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4263 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4264 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4265 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4266 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4267 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4268 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4269 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4270 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4271 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4272 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4273 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4274 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4275 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4276 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4277 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4278 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4279 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 4280
4281 /* NFSv4.1 operations */
4282 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 4283 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 4284 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4285 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 4286 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4287 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb 4288 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc
CH		 4289#ifdef CONFIG_NFSD_PNFS
4290 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4291 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4292 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4293 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4294 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4295#else
2db134eb
AA		 4296 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4297 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4298 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4299 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4300 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc 4301#endif
22b6dee8 4302 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 4303 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4304 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 4305 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 4306 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4307 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4308 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
87a15a80
AS		 4309
4310 /* NFSv4.2 operations */
4311 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
29ae7f9d 4312 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
87a15a80
AS		 4313 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4314 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4315 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4316 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4317 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4318 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4319 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4320 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
24bab491 4321 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
87a15a80 4322 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
ffa0160a 4323 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 4324};
4325
496c262c 4326/*
a8095f7e
BF		 4327 * Calculate whether we still have space to encode repsize bytes.
4328 * There are two considerations:
4329 * - For NFS versions >=4.1, the size of the reply must stay within
4330 * session limits
4331 * - For all NFS versions, we must stay within limited preallocated
4332 * buffer space.
496c262c 4333 *
a8095f7e
BF		 4334 * This is called before the operation is processed, so can only provide
4335 * an upper estimate. For some nonidempotent operations (such as
4336 * getattr), it's not necessarily a problem if that estimate is wrong,
4337 * as we can fail it after processing without significant side effects.
496c262c 4338 */
a8095f7e 4339__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 4340{
67492c99 4341 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 4342 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 4343
47ee5298
BF		 4344 if (buf->len + respsize <= buf->buflen)
4345 return nfs_ok;
4346 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 4347 return nfserr_resource;
47ee5298
BF		 4348 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4349 WARN_ON_ONCE(1);
4350 return nfserr_rep_too_big_to_cache;
ea8d7720 4351 }
47ee5298 4352 return nfserr_rep_too_big;
496c262c
AA		 4353}
4354
1da177e4
LT		 4355void
4356nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4357{
082d4bd7 4358 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 4359 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 4360 struct svc_rqst *rqstp = resp->rqstp;
34b1744c 4361 const struct nfsd4_operation *opdesc = op->opdesc;
082d4bd7 4362 int post_err_offset;
07d1f802 4363 nfsd4_enc encoder;
bc749ca4 4364 __be32 *p;
1da177e4 4365
d0a381dd
BF		 4366 p = xdr_reserve_space(xdr, 8);
4367 if (!p) {
4368 WARN_ON_ONCE(1);
4369 return;
4370 }
c373b0a4 4371 *p++ = cpu_to_be32(op->opnum);
082d4bd7 4372 post_err_offset = xdr->buf->len;
1da177e4 4373
695e12f8
BH		 4374 if (op->opnum == OP_ILLEGAL)
4375 goto status;
b7571e4c
BF		 4376 if (op->status && opdesc &&
4377 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
4378 goto status;
695e12f8
BH		 4379 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4380 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 4381 encoder = nfsd4_enc_ops[op->opnum];
4382 op->status = encoder(resp, op->status, &op->u);
34b1744c
BF		 4383 if (opdesc && opdesc->op_release)
4384 opdesc->op_release(&op->u);
2825a7f9
BF		 4385 xdr_commit_encode(xdr);
4386
067e1ace 4387 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 4388 if (!op->status) {
4389 int space_needed = 0;
4390 if (!nfsd4_last_compound_op(rqstp))
4391 space_needed = COMPOUND_ERR_SLACK_SPACE;
4392 op->status = nfsd4_check_resp_size(resp, space_needed);
4393 }
c8f13d97
BF		 4394 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4395 struct nfsd4_slot *slot = resp->cstate.slot;
4396
4397 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4398 op->status = nfserr_rep_too_big_to_cache;
4399 else
4400 op->status = nfserr_rep_too_big;
4401 }
07d1f802
BF		 4402 if (op->status == nfserr_resource ||
4403 op->status == nfserr_rep_too_big ||
4404 op->status == nfserr_rep_too_big_to_cache) {
4405 /*
4406 * The operation may have already been encoded or
4407 * partially encoded. No op returns anything additional
4408 * in the case of one of these three errors, so we can
4409 * just truncate back to after the status. But it's a
4410 * bug if we had to do this on a non-idempotent op:
4411 */
4412 warn_on_nonidempotent_op(op);
082d4bd7 4413 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 4414 }
9411b1d4 4415 if (so) {
082d4bd7
BF		 4416 int len = xdr->buf->len - post_err_offset;
4417
9411b1d4 4418 so->so_replay.rp_status = op->status;
082d4bd7
BF		 4419 so->so_replay.rp_buflen = len;
4420 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4421 so->so_replay.rp_buf, len);
9411b1d4 4422 }
695e12f8 4423status:
082d4bd7
BF		 4424 /* Note that op->status is already in network byte order: */
4425 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 4426}
4427
4428/*
4429 * Encode the reply stored in the stateowner reply cache
4430 *
4431 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4432 * previously sent already encoded operation.
1da177e4
LT		 4433 */
4434void
d0a381dd 4435nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 4436{
bc749ca4 4437 __be32 *p;
1da177e4
LT		 4438 struct nfs4_replay *rp = op->replay;
4439
4440 BUG_ON(!rp);
4441
d0a381dd
BF		 4442 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4443 if (!p) {
4444 WARN_ON_ONCE(1);
4445 return;
4446 }
c373b0a4 4447 *p++ = cpu_to_be32(op->opnum);
1da177e4 4448 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 4449
0c0c267b 4450 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 4451}
4452
1da177e4 4453int
63f8de37 4454nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
1da177e4
LT		 4455{
4456 return xdr_ressize_check(rqstp, p);
4457}
4458
8537488b 4459void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
1da177e4 4460{
3e98abff
BF		 4461 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4462
1da177e4
LT		 4463 if (args->ops != args->iops) {
4464 kfree(args->ops);
4465 args->ops = args->iops;
4466 }
f99d49ad
JJ		 4467 kfree(args->tmpp);
4468 args->tmpp = NULL;
1da177e4 4469 while (args->to_free) {
d5e23383 4470 struct svcxdr_tmpbuf *tb = args->to_free;
1da177e4 4471 args->to_free = tb->next;
1da177e4
LT		 4472 kfree(tb);
4473 }
4474}
4475
4476int
026fec7e 4477nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
1da177e4 4478{
026fec7e
CH		 4479 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4480
e874f9f8
JL		 4481 if (rqstp->rq_arg.head[0].iov_len % 4) {
4482 /* client is nuts */
4483 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4484 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4485 return 0;
4486 }
1da177e4
LT		 4487 args->p = p;
4488 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4489 args->pagelist = rqstp->rq_arg.pages;
4490 args->pagelen = rqstp->rq_arg.page_len;
eae03e2a 4491 args->tail = false;
1da177e4
LT		 4492 args->tmpp = NULL;
4493 args->to_free = NULL;
4494 args->ops = args->iops;
4495 args->rqstp = rqstp;
4496
3e98abff 4497 return !nfsd4_decode_compound(args);
1da177e4
LT		 4498}
4499
4500int
63f8de37 4501nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
1da177e4
LT		 4502{
4503 /*
4504 * All that remains is to write the tag and operation count...
4505 */
63f8de37 4506 struct nfsd4_compoundres *resp = rqstp->rq_resp;
6ac90391
BF		 4507 struct xdr_buf *buf = resp->xdr.buf;
4508
4509 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4510 buf->tail[0].iov_len);
dd97fdde 4511
2825a7f9
BF		 4512 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4513
1da177e4
LT		 4514 p = resp->tagp;
4515 *p++ = htonl(resp->taglen);
4516 memcpy(p, resp->tag, resp->taglen);
4517 p += XDR_QUADLEN(resp->taglen);
4518 *p++ = htonl(resp->opcnt);
4519
b607664e 4520 nfsd4_sequence_done(resp);
1da177e4
LT		 4521 return 1;
4522}
4523
4524/*
4525 * Local variables:
4526 * c-basic-offset: 8
4527 * End:
4528 */
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