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Merge tag 'scmi-fixes-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep...
[mirror_ubuntu-focal-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 272static __be32
bdba5368 273nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
4c94e13e
CH		 274{
275 DECODE_HEAD;
4c94e13e
CH		 276
277 READ_BUF(12);
bdba5368 278 p = xdr_decode_hyper(p, &tv->tv_sec);
4c94e13e
CH		 279 tv->tv_nsec = be32_to_cpup(p++);
280 if (tv->tv_nsec >= (u32)1000000000)
281 return nfserr_inval;
282
283 DECODE_TAIL;
284}
285
b37ad28b 286static __be32
1da177e4
LT		 287nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
288{
289 u32 bmlen;
290 DECODE_HEAD;
291
292 bmval[0] = 0;
293 bmval[1] = 0;
7e705706 294 bmval[2] = 0;
1da177e4
LT		 295
296 READ_BUF(4);
06553991 297 bmlen = be32_to_cpup(p++);
1da177e4
LT		 298 if (bmlen > 1000)
299 goto xdr_error;
300
301 READ_BUF(bmlen << 2);
302 if (bmlen > 0)
06553991 303 bmval[0] = be32_to_cpup(p++);
1da177e4 304 if (bmlen > 1)
06553991 305 bmval[1] = be32_to_cpup(p++);
7e705706 306 if (bmlen > 2)
06553991 307 bmval[2] = be32_to_cpup(p++);
1da177e4
LT		 308
309 DECODE_TAIL;
310}
311
b37ad28b 312static __be32
3c8e0316 313nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0 314 struct iattr *iattr, struct nfs4_acl **acl,
47057abd 315 struct xdr_netobj *label, int *umask)
1da177e4
LT		 316{
317 int expected_len, len = 0;
318 u32 dummy32;
319 char *buf;
320
321 DECODE_HEAD;
322 iattr->ia_valid = 0;
323 if ((status = nfsd4_decode_bitmap(argp, bmval)))
324 return status;
325
e864c189
BF		 326 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
327 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
328 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
329 if (nfsd_attrs_supported(argp->minorversion, bmval))
330 return nfserr_inval;
331 return nfserr_attrnotsupp;
332 }
333
1da177e4 334 READ_BUF(4);
06553991 335 expected_len = be32_to_cpup(p++);
1da177e4
LT		 336
337 if (bmval[0] & FATTR4_WORD0_SIZE) {
338 READ_BUF(8);
339 len += 8;
542d1ab3 340 p = xdr_decode_hyper(p, &iattr->ia_size);
1da177e4
LT		 341 iattr->ia_valid |= ATTR_SIZE;
342 }
343 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 344 u32 nace;
28e05dd8 345 struct nfs4_ace *ace;
1da177e4
LT		 346
347 READ_BUF(4); len += 4;
06553991 348 nace = be32_to_cpup(p++);
1da177e4 349
28e05dd8 350 if (nace > NFS4_ACL_MAX)
798df338 351 return nfserr_fbig;
28e05dd8 352
d5e23383 353 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
eba1c99c
KM		 354 if (*acl == NULL)
355 return nfserr_jukebox;
356
28e05dd8
BF		 357 (*acl)->naces = nace;
358 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 359 READ_BUF(16); len += 16;
06553991
BF		 360 ace->type = be32_to_cpup(p++);
361 ace->flag = be32_to_cpup(p++);
362 ace->access_mask = be32_to_cpup(p++);
363 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 364 READ_BUF(dummy32);
365 len += XDR_QUADLEN(dummy32) << 2;
366 READMEM(buf, dummy32);
28e05dd8 367 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 368 status = nfs_ok;
28e05dd8 369 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 370 ;
28e05dd8 371 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 372 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 373 buf, dummy32, &ace->who_gid);
1da177e4 374 else
3c726023 375 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 376 buf, dummy32, &ace->who_uid);
3c726023
BF		 377 if (status)
378 return status;
1da177e4
LT		 379 }
380 } else
381 *acl = NULL;
382 if (bmval[1] & FATTR4_WORD1_MODE) {
383 READ_BUF(4);
384 len += 4;
06553991 385 iattr->ia_mode = be32_to_cpup(p++);
1da177e4
LT		 386 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
387 iattr->ia_valid |= ATTR_MODE;
388 }
389 if (bmval[1] & FATTR4_WORD1_OWNER) {
390 READ_BUF(4);
391 len += 4;
06553991 392 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 393 READ_BUF(dummy32);
394 len += (XDR_QUADLEN(dummy32) << 2);
395 READMEM(buf, dummy32);
47c85291
N		 396 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
397 return status;
1da177e4
LT		 398 iattr->ia_valid |= ATTR_UID;
399 }
400 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
401 READ_BUF(4);
402 len += 4;
06553991 403 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 404 READ_BUF(dummy32);
405 len += (XDR_QUADLEN(dummy32) << 2);
406 READMEM(buf, dummy32);
47c85291
N		 407 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
408 return status;
1da177e4
LT		 409 iattr->ia_valid |= ATTR_GID;
410 }
411 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
412 READ_BUF(4);
413 len += 4;
06553991 414 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 415 switch (dummy32) {
416 case NFS4_SET_TO_CLIENT_TIME:
1da177e4 417 len += 12;
bdba5368 418 status = nfsd4_decode_time(argp, &iattr->ia_atime);
4c94e13e
CH		 419 if (status)
420 return status;
1da177e4
LT		 421 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
422 break;
423 case NFS4_SET_TO_SERVER_TIME:
424 iattr->ia_valid |= ATTR_ATIME;
425 break;
426 default:
427 goto xdr_error;
428 }
429 }
1da177e4
LT		 430 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
431 READ_BUF(4);
432 len += 4;
06553991 433 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 434 switch (dummy32) {
435 case NFS4_SET_TO_CLIENT_TIME:
1da177e4 436 len += 12;
bdba5368 437 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
4c94e13e
CH		 438 if (status)
439 return status;
1da177e4
LT		 440 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
441 break;
442 case NFS4_SET_TO_SERVER_TIME:
443 iattr->ia_valid |= ATTR_MTIME;
444 break;
445 default:
446 goto xdr_error;
447 }
448 }
18032ca0
DQ		 449
450 label->len = 0;
2285ae76
AB		 451 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
452 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
18032ca0
DQ		 453 READ_BUF(4);
454 len += 4;
06553991 455 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
18032ca0
DQ		 456 READ_BUF(4);
457 len += 4;
06553991 458 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
18032ca0
DQ		 459 READ_BUF(4);
460 len += 4;
06553991 461 dummy32 = be32_to_cpup(p++);
18032ca0 462 READ_BUF(dummy32);
1ec8c0c4 463 if (dummy32 > NFS4_MAXLABELLEN)
18032ca0
DQ		 464 return nfserr_badlabel;
465 len += (XDR_QUADLEN(dummy32) << 2);
466 READMEM(buf, dummy32);
29c353b3
BF		 467 label->len = dummy32;
468 label->data = svcxdr_dupstr(argp, buf, dummy32);
18032ca0
DQ		 469 if (!label->data)
470 return nfserr_jukebox;
18032ca0 471 }
47057abd
AG		 472 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
473 if (!umask)
474 goto xdr_error;
475 READ_BUF(8);
476 len += 8;
477 dummy32 = be32_to_cpup(p++);
478 iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO);
479 dummy32 = be32_to_cpup(p++);
480 *umask = dummy32 & S_IRWXUGO;
481 iattr->ia_valid |= ATTR_MODE;
482 }
e864c189 483 if (len != expected_len)
1da177e4
LT		 484 goto xdr_error;
485
486 DECODE_TAIL;
1da177e4
LT		 487}
488
e31a1b66
BH		 489static __be32
490nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
491{
492 DECODE_HEAD;
493
494 READ_BUF(sizeof(stateid_t));
06553991 495 sid->si_generation = be32_to_cpup(p++);
e31a1b66
BH		 496 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
497
498 DECODE_TAIL;
499}
500
b37ad28b 501static __be32
1da177e4
LT		 502nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
503{
504 DECODE_HEAD;
505
506 READ_BUF(4);
06553991 507 access->ac_req_access = be32_to_cpup(p++);
1da177e4
LT		 508
509 DECODE_TAIL;
510}
511
acb2887e
BF		 512static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
513{
514 DECODE_HEAD;
e45d1a18 515 struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
12fc3e92 516 u32 dummy, uid, gid;
acb2887e
BF		 517 char *machine_name;
518 int i;
519 int nr_secflavs;
520
521 /* callback_sec_params4 */
522 READ_BUF(4);
06553991 523 nr_secflavs = be32_to_cpup(p++);
57569a70
BF		 524 if (nr_secflavs)
525 cbs->flavor = (u32)(-1);
526 else
527 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
528 cbs->flavor = 0;
acb2887e
BF		 529 for (i = 0; i < nr_secflavs; ++i) {
530 READ_BUF(4);
06553991 531 dummy = be32_to_cpup(p++);
acb2887e
BF		 532 switch (dummy) {
533 case RPC_AUTH_NULL:
534 /* Nothing to read */
12fc3e92
BF		 535 if (cbs->flavor == (u32)(-1))
536 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 537 break;
538 case RPC_AUTH_UNIX:
539 READ_BUF(8);
540 /* stamp */
06553991 541 dummy = be32_to_cpup(p++);
acb2887e
BF		 542
543 /* machine name */
06553991 544 dummy = be32_to_cpup(p++);
acb2887e
BF		 545 READ_BUF(dummy);
546 SAVEMEM(machine_name, dummy);
547
548 /* uid, gid */
549 READ_BUF(8);
06553991
BF		 550 uid = be32_to_cpup(p++);
551 gid = be32_to_cpup(p++);
acb2887e
BF		 552
553 /* more gids */
554 READ_BUF(4);
06553991 555 dummy = be32_to_cpup(p++);
acb2887e 556 READ_BUF(dummy * 4);
12fc3e92 557 if (cbs->flavor == (u32)(-1)) {
e45d1a18
TM		 558 kuid_t kuid = make_kuid(userns, uid);
559 kgid_t kgid = make_kgid(userns, gid);
03bc6d1c
EB		 560 if (uid_valid(kuid) && gid_valid(kgid)) {
561 cbs->uid = kuid;
562 cbs->gid = kgid;
563 cbs->flavor = RPC_AUTH_UNIX;
564 } else {
565 dprintk("RPC_AUTH_UNIX with invalid"
566 "uid or gid ignoring!\n");
567 }
12fc3e92 568 }
acb2887e
BF		 569 break;
570 case RPC_AUTH_GSS:
571 dprintk("RPC_AUTH_GSS callback secflavor "
572 "not supported!\n");
573 READ_BUF(8);
574 /* gcbp_service */
06553991 575 dummy = be32_to_cpup(p++);
acb2887e 576 /* gcbp_handle_from_server */
06553991 577 dummy = be32_to_cpup(p++);
acb2887e
BF		 578 READ_BUF(dummy);
579 p += XDR_QUADLEN(dummy);
580 /* gcbp_handle_from_client */
581 READ_BUF(4);
06553991 582 dummy = be32_to_cpup(p++);
acb2887e
BF		 583 READ_BUF(dummy);
584 break;
585 default:
586 dprintk("Illegal callback secflavor\n");
587 return nfserr_inval;
588 }
589 }
590 DECODE_TAIL;
591}
592
cb73a9f4
BF		 593static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
594{
595 DECODE_HEAD;
596
597 READ_BUF(4);
06553991 598 bc->bc_cb_program = be32_to_cpup(p++);
cb73a9f4
BF		 599 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
600
601 DECODE_TAIL;
602}
603
1d1bc8f2
BF		 604static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
605{
606 DECODE_HEAD;
1d1bc8f2
BF		 607
608 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
609 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991 610 bcts->dir = be32_to_cpup(p++);
6ce2357f
BS		 611 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
612 * could help us figure out we should be using it. */
1d1bc8f2
BF		 613 DECODE_TAIL;
614}
615
b37ad28b 616static __be32
1da177e4
LT		 617nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
618{
619 DECODE_HEAD;
620
e31a1b66 621 READ_BUF(4);
06553991 622 close->cl_seqid = be32_to_cpup(p++);
e31a1b66 623 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 624
625 DECODE_TAIL;
626}
627
628
b37ad28b 629static __be32
1da177e4
LT		 630nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
631{
632 DECODE_HEAD;
633
634 READ_BUF(12);
542d1ab3 635 p = xdr_decode_hyper(p, &commit->co_offset);
06553991 636 commit->co_count = be32_to_cpup(p++);
1da177e4
LT		 637
638 DECODE_TAIL;
639}
640
b37ad28b 641static __be32
1da177e4
LT		 642nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
643{
644 DECODE_HEAD;
645
646 READ_BUF(4);
06553991 647 create->cr_type = be32_to_cpup(p++);
1da177e4
LT		 648 switch (create->cr_type) {
649 case NF4LNK:
650 READ_BUF(4);
7fb84306
BF		 651 create->cr_datalen = be32_to_cpup(p++);
652 READ_BUF(create->cr_datalen);
29c353b3 653 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
7fb84306 654 if (!create->cr_data)
76f47128 655 return nfserr_jukebox;
1da177e4
LT		 656 break;
657 case NF4BLK:
658 case NF4CHR:
659 READ_BUF(8);
06553991
BF		 660 create->cr_specdata1 = be32_to_cpup(p++);
661 create->cr_specdata2 = be32_to_cpup(p++);
1da177e4
LT		 662 break;
663 case NF4SOCK:
664 case NF4FIFO:
665 case NF4DIR:
666 default:
667 break;
668 }
669
670 READ_BUF(4);
06553991 671 create->cr_namelen = be32_to_cpup(p++);
1da177e4
LT		 672 READ_BUF(create->cr_namelen);
673 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 674 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 675 return status;
676
3c8e0316 677 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
47057abd 678 &create->cr_acl, &create->cr_label,
880a3a53 679 &create->cr_umask);
c0d6fc8a 680 if (status)
1da177e4
LT		 681 goto out;
682
683 DECODE_TAIL;
684}
685
b37ad28b 686static inline __be32
1da177e4
LT		 687nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
688{
e31a1b66 689 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 690}
691
b37ad28b 692static inline __be32
1da177e4
LT		 693nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
694{
695 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
696}
697
b37ad28b 698static __be32
1da177e4
LT		 699nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
700{
701 DECODE_HEAD;
702
703 READ_BUF(4);
06553991 704 link->li_namelen = be32_to_cpup(p++);
1da177e4
LT		 705 READ_BUF(link->li_namelen);
706 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 707 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 708 return status;
709
710 DECODE_TAIL;
711}
712
b37ad28b 713static __be32
1da177e4
LT		 714nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
715{
716 DECODE_HEAD;
717
1da177e4
LT		 718 /*
719 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
720 */
721 READ_BUF(28);
06553991 722 lock->lk_type = be32_to_cpup(p++);
1da177e4
LT		 723 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
724 goto xdr_error;
06553991 725 lock->lk_reclaim = be32_to_cpup(p++);
542d1ab3
BF		 726 p = xdr_decode_hyper(p, &lock->lk_offset);
727 p = xdr_decode_hyper(p, &lock->lk_length);
06553991 728 lock->lk_is_new = be32_to_cpup(p++);
1da177e4
LT		 729
730 if (lock->lk_is_new) {
e31a1b66 731 READ_BUF(4);
06553991 732 lock->lk_new_open_seqid = be32_to_cpup(p++);
e31a1b66
BH		 733 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
734 if (status)
735 return status;
736 READ_BUF(8 + sizeof(clientid_t));
06553991 737 lock->lk_new_lock_seqid = be32_to_cpup(p++);
1da177e4 738 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
06553991 739 lock->lk_new_owner.len = be32_to_cpup(p++);
1da177e4
LT		 740 READ_BUF(lock->lk_new_owner.len);
741 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
742 } else {
e31a1b66
BH		 743 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
744 if (status)
745 return status;
746 READ_BUF(4);
06553991 747 lock->lk_old_lock_seqid = be32_to_cpup(p++);
1da177e4
LT		 748 }
749
750 DECODE_TAIL;
751}
752
b37ad28b 753static __be32
1da177e4
LT		 754nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
755{
756 DECODE_HEAD;
757
758 READ_BUF(32);
06553991 759 lockt->lt_type = be32_to_cpup(p++);
1da177e4
LT		 760 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
761 goto xdr_error;
542d1ab3
BF		 762 p = xdr_decode_hyper(p, &lockt->lt_offset);
763 p = xdr_decode_hyper(p, &lockt->lt_length);
1da177e4 764 COPYMEM(&lockt->lt_clientid, 8);
06553991 765 lockt->lt_owner.len = be32_to_cpup(p++);
1da177e4
LT		 766 READ_BUF(lockt->lt_owner.len);
767 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
768
769 DECODE_TAIL;
770}
771
b37ad28b 772static __be32
1da177e4
LT		 773nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
774{
775 DECODE_HEAD;
776
e31a1b66 777 READ_BUF(8);
06553991 778 locku->lu_type = be32_to_cpup(p++);
1da177e4
LT		 779 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
780 goto xdr_error;
06553991 781 locku->lu_seqid = be32_to_cpup(p++);
e31a1b66
BH		 782 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
783 if (status)
784 return status;
785 READ_BUF(16);
542d1ab3
BF		 786 p = xdr_decode_hyper(p, &locku->lu_offset);
787 p = xdr_decode_hyper(p, &locku->lu_length);
1da177e4
LT		 788
789 DECODE_TAIL;
790}
791
b37ad28b 792static __be32
1da177e4
LT		 793nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
794{
795 DECODE_HEAD;
796
797 READ_BUF(4);
06553991 798 lookup->lo_len = be32_to_cpup(p++);
1da177e4
LT		 799 READ_BUF(lookup->lo_len);
800 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 801 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 802 return status;
803
804 DECODE_TAIL;
805}
806
2c8bd7e0 807static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 808{
809 __be32 *p;
810 u32 w;
811
812 READ_BUF(4);
06553991 813 w = be32_to_cpup(p++);
2c8bd7e0
BH		 814 *share_access = w & NFS4_SHARE_ACCESS_MASK;
815 *deleg_want = w & NFS4_SHARE_WANT_MASK;
816 if (deleg_when)
817 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
818
04f9e664
BF		 819 switch (w & NFS4_SHARE_ACCESS_MASK) {
820 case NFS4_SHARE_ACCESS_READ:
821 case NFS4_SHARE_ACCESS_WRITE:
822 case NFS4_SHARE_ACCESS_BOTH:
823 break;
824 default:
825 return nfserr_bad_xdr;
826 }
fc0d14fe 827 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 828 if (!w)
829 return nfs_ok;
830 if (!argp->minorversion)
831 return nfserr_bad_xdr;
832 switch (w & NFS4_SHARE_WANT_MASK) {
833 case NFS4_SHARE_WANT_NO_PREFERENCE:
834 case NFS4_SHARE_WANT_READ_DELEG:
835 case NFS4_SHARE_WANT_WRITE_DELEG:
836 case NFS4_SHARE_WANT_ANY_DELEG:
837 case NFS4_SHARE_WANT_NO_DELEG:
838 case NFS4_SHARE_WANT_CANCEL:
839 break;
840 default:
841 return nfserr_bad_xdr;
842 }
92bac8c5 843 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 844 if (!w)
845 return nfs_ok;
2c8bd7e0
BH		 846
847 if (!deleg_when) /* open_downgrade */
848 return nfserr_inval;
04f9e664
BF		 849 switch (w) {
850 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
851 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 852 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
853 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 854 return nfs_ok;
855 }
856xdr_error:
857 return nfserr_bad_xdr;
858}
859
860static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
861{
862 __be32 *p;
863
864 READ_BUF(4);
06553991 865 *x = be32_to_cpup(p++);
04f9e664 866 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 867 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 868 return nfserr_bad_xdr;
869 return nfs_ok;
870xdr_error:
871 return nfserr_bad_xdr;
872}
873
a084daf5
BF		 874static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
875{
876 __be32 *p;
877
878 READ_BUF(4);
06553991 879 o->len = be32_to_cpup(p++);
a084daf5
BF		 880
881 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
882 return nfserr_bad_xdr;
883
884 READ_BUF(o->len);
885 SAVEMEM(o->data, o->len);
886 return nfs_ok;
887xdr_error:
888 return nfserr_bad_xdr;
889}
890
b37ad28b 891static __be32
1da177e4
LT		 892nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
893{
894 DECODE_HEAD;
2c8bd7e0 895 u32 dummy;
1da177e4
LT		 896
897 memset(open->op_bmval, 0, sizeof(open->op_bmval));
898 open->op_iattr.ia_valid = 0;
fe0750e5 899 open->op_openowner = NULL;
1da177e4 900
9d313b17 901 open->op_xdr_error = 0;
1da177e4 902 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 903 READ_BUF(4);
06553991 904 open->op_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 905 /* decode, yet ignore deleg_when until supported */
906 status = nfsd4_decode_share_access(argp, &open->op_share_access,
907 &open->op_deleg_want, &dummy);
04f9e664
BF		 908 if (status)
909 goto xdr_error;
910 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
911 if (status)
912 goto xdr_error;
a084daf5 913 READ_BUF(sizeof(clientid_t));
1da177e4 914 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 915 status = nfsd4_decode_opaque(argp, &open->op_owner);
916 if (status)
917 goto xdr_error;
918 READ_BUF(4);
06553991 919 open->op_create = be32_to_cpup(p++);
1da177e4
LT		 920 switch (open->op_create) {
921 case NFS4_OPEN_NOCREATE:
922 break;
923 case NFS4_OPEN_CREATE:
924 READ_BUF(4);
06553991 925 open->op_createmode = be32_to_cpup(p++);
1da177e4
LT		 926 switch (open->op_createmode) {
927 case NFS4_CREATE_UNCHECKED:
928 case NFS4_CREATE_GUARDED:
c0d6fc8a 929 status = nfsd4_decode_fattr(argp, open->op_bmval,
47057abd 930 &open->op_iattr, &open->op_acl, &open->op_label,
880a3a53 931 &open->op_umask);
c0d6fc8a 932 if (status)
1da177e4
LT		 933 goto out;
934 break;
935 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 936 READ_BUF(NFS4_VERIFIER_SIZE);
937 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 938 break;
79fb54ab
BH		 939 case NFS4_CREATE_EXCLUSIVE4_1:
940 if (argp->minorversion < 1)
941 goto xdr_error;
ab4684d1
CL		 942 READ_BUF(NFS4_VERIFIER_SIZE);
943 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 944 status = nfsd4_decode_fattr(argp, open->op_bmval,
47057abd 945 &open->op_iattr, &open->op_acl, &open->op_label,
880a3a53 946 &open->op_umask);
79fb54ab
BH		 947 if (status)
948 goto out;
949 break;
1da177e4
LT		 950 default:
951 goto xdr_error;
952 }
953 break;
954 default:
955 goto xdr_error;
956 }
957
958 /* open_claim */
959 READ_BUF(4);
06553991 960 open->op_claim_type = be32_to_cpup(p++);
1da177e4
LT		 961 switch (open->op_claim_type) {
962 case NFS4_OPEN_CLAIM_NULL:
963 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
964 READ_BUF(4);
06553991 965 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 966 READ_BUF(open->op_fname.len);
967 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 968 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 969 return status;
970 break;
971 case NFS4_OPEN_CLAIM_PREVIOUS:
972 READ_BUF(4);
06553991 973 open->op_delegate_type = be32_to_cpup(p++);
1da177e4
LT		 974 break;
975 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 976 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
977 if (status)
978 return status;
979 READ_BUF(4);
06553991 980 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 981 READ_BUF(open->op_fname.len);
982 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 983 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 984 return status;
985 break;
8b289b2c
BF		 986 case NFS4_OPEN_CLAIM_FH:
987 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
988 if (argp->minorversion < 1)
989 goto xdr_error;
990 /* void */
991 break;
992 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
993 if (argp->minorversion < 1)
994 goto xdr_error;
995 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
996 if (status)
997 return status;
998 break;
1da177e4
LT		 999 default:
1000 goto xdr_error;
1001 }
1002
1003 DECODE_TAIL;
1004}
1005
b37ad28b 1006static __be32
1da177e4
LT		 1007nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1008{
1009 DECODE_HEAD;
e1a90ebd
AS		 1010
1011 if (argp->minorversion >= 1)
1012 return nfserr_notsupp;
1013
e31a1b66
BH		 1014 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
1015 if (status)
1016 return status;
1017 READ_BUF(4);
06553991 1018 open_conf->oc_seqid = be32_to_cpup(p++);
e1a90ebd 1019
1da177e4
LT		 1020 DECODE_TAIL;
1021}
1022
b37ad28b 1023static __be32
1da177e4
LT		 1024nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1025{
1026 DECODE_HEAD;
1027
e31a1b66
BH		 1028 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
1029 if (status)
1030 return status;
04f9e664 1031 READ_BUF(4);
06553991 1032 open_down->od_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 1033 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1034 &open_down->od_deleg_want, NULL);
04f9e664
BF		 1035 if (status)
1036 return status;
1037 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1038 if (status)
1039 return status;
1da177e4
LT		 1040 DECODE_TAIL;
1041}
1042
b37ad28b 1043static __be32
1da177e4
LT		 1044nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1045{
1046 DECODE_HEAD;
1047
1048 READ_BUF(4);
06553991 1049 putfh->pf_fhlen = be32_to_cpup(p++);
1da177e4
LT		 1050 if (putfh->pf_fhlen > NFS4_FHSIZE)
1051 goto xdr_error;
1052 READ_BUF(putfh->pf_fhlen);
1053 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1054
1055 DECODE_TAIL;
1056}
1057
e1a90ebd
AS		 1058static __be32
1059nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1060{
1061 if (argp->minorversion == 0)
1062 return nfs_ok;
1063 return nfserr_notsupp;
1064}
1065
b37ad28b 1066static __be32
1da177e4
LT		 1067nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1068{
1069 DECODE_HEAD;
1070
e31a1b66
BH		 1071 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1072 if (status)
1073 return status;
1074 READ_BUF(12);
542d1ab3 1075 p = xdr_decode_hyper(p, &read->rd_offset);
06553991 1076 read->rd_length = be32_to_cpup(p++);
1da177e4
LT		 1077
1078 DECODE_TAIL;
1079}
1080
b37ad28b 1081static __be32
1da177e4
LT		 1082nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1083{
1084 DECODE_HEAD;
1085
1086 READ_BUF(24);
542d1ab3 1087 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1da177e4 1088 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
06553991
BF		 1089 readdir->rd_dircount = be32_to_cpup(p++);
1090 readdir->rd_maxcount = be32_to_cpup(p++);
1da177e4
LT		 1091 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1092 goto out;
1093
1094 DECODE_TAIL;
1095}
1096
b37ad28b 1097static __be32
1da177e4
LT		 1098nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1099{
1100 DECODE_HEAD;
1101
1102 READ_BUF(4);
06553991 1103 remove->rm_namelen = be32_to_cpup(p++);
1da177e4
LT		 1104 READ_BUF(remove->rm_namelen);
1105 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1106 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1107 return status;
1108
1109 DECODE_TAIL;
1110}
1111
b37ad28b 1112static __be32
1da177e4
LT		 1113nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1114{
1115 DECODE_HEAD;
1116
1117 READ_BUF(4);
06553991 1118 rename->rn_snamelen = be32_to_cpup(p++);
4aed9c46 1119 READ_BUF(rename->rn_snamelen);
1da177e4 1120 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
4aed9c46 1121 READ_BUF(4);
06553991 1122 rename->rn_tnamelen = be32_to_cpup(p++);
1da177e4
LT		 1123 READ_BUF(rename->rn_tnamelen);
1124 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1125 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1126 return status;
a36b1725 1127 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1128 return status;
1129
1130 DECODE_TAIL;
1131}
1132
b37ad28b 1133static __be32
1da177e4
LT		 1134nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1135{
1136 DECODE_HEAD;
1137
e1a90ebd
AS		 1138 if (argp->minorversion >= 1)
1139 return nfserr_notsupp;
1140
1da177e4
LT		 1141 READ_BUF(sizeof(clientid_t));
1142 COPYMEM(clientid, sizeof(clientid_t));
1143
1144 DECODE_TAIL;
1145}
1146
dcb488a3
AA		 1147static __be32
1148nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1149 struct nfsd4_secinfo *secinfo)
1150{
1151 DECODE_HEAD;
1152
1153 READ_BUF(4);
06553991 1154 secinfo->si_namelen = be32_to_cpup(p++);
dcb488a3
AA		 1155 READ_BUF(secinfo->si_namelen);
1156 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1157 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1158 if (status)
1159 return status;
1160 DECODE_TAIL;
1161}
1162
04f4ad16
BF		 1163static __be32
1164nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1165 struct nfsd4_secinfo_no_name *sin)
1166{
1167 DECODE_HEAD;
1168
1169 READ_BUF(4);
06553991 1170 sin->sin_style = be32_to_cpup(p++);
04f4ad16
BF		 1171 DECODE_TAIL;
1172}
1173
b37ad28b 1174static __be32
1da177e4
LT		 1175nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1176{
e31a1b66 1177 __be32 status;
1da177e4 1178
e31a1b66
BH		 1179 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1180 if (status)
1181 return status;
3c8e0316 1182 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
47057abd 1183 &setattr->sa_acl, &setattr->sa_label, NULL);
1da177e4
LT		 1184}
1185
b37ad28b 1186static __be32
1da177e4
LT		 1187nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1188{
1189 DECODE_HEAD;
1190
e1a90ebd
AS		 1191 if (argp->minorversion >= 1)
1192 return nfserr_notsupp;
1193
ab4684d1
CL		 1194 READ_BUF(NFS4_VERIFIER_SIZE);
1195 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1196
a084daf5
BF		 1197 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1198 if (status)
1199 return nfserr_bad_xdr;
1200 READ_BUF(8);
06553991
BF		 1201 setclientid->se_callback_prog = be32_to_cpup(p++);
1202 setclientid->se_callback_netid_len = be32_to_cpup(p++);
4aed9c46 1203 READ_BUF(setclientid->se_callback_netid_len);
1da177e4 1204 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
4aed9c46 1205 READ_BUF(4);
06553991 1206 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1da177e4 1207
4aed9c46 1208 READ_BUF(setclientid->se_callback_addr_len);
1da177e4 1209 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
4aed9c46 1210 READ_BUF(4);
06553991 1211 setclientid->se_callback_ident = be32_to_cpup(p++);
1da177e4
LT		 1212
1213 DECODE_TAIL;
1214}
1215
b37ad28b 1216static __be32
1da177e4
LT		 1217nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1218{
1219 DECODE_HEAD;
1220
e1a90ebd
AS		 1221 if (argp->minorversion >= 1)
1222 return nfserr_notsupp;
1223
ab4684d1 1224 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1225 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1226 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1227
1228 DECODE_TAIL;
1229}
1230
1231/* Also used for NVERIFY */
b37ad28b 1232static __be32
1da177e4
LT		 1233nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1234{
1da177e4
LT		 1235 DECODE_HEAD;
1236
1237 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1238 goto out;
1239
1240 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1241 * nfsd4_proc_verify */
1242
1da177e4 1243 READ_BUF(4);
06553991 1244 verify->ve_attrlen = be32_to_cpup(p++);
1da177e4
LT		 1245 READ_BUF(verify->ve_attrlen);
1246 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1247
1248 DECODE_TAIL;
1249}
1250
b37ad28b 1251static __be32
1da177e4
LT		 1252nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1253{
1254 int avail;
1da177e4
LT		 1255 int len;
1256 DECODE_HEAD;
1257
e31a1b66
BH		 1258 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1259 if (status)
1260 return status;
1261 READ_BUF(16);
542d1ab3 1262 p = xdr_decode_hyper(p, &write->wr_offset);
06553991 1263 write->wr_stable_how = be32_to_cpup(p++);
54bbb7d2 1264 if (write->wr_stable_how > NFS_FILE_SYNC)
1da177e4 1265 goto xdr_error;
06553991 1266 write->wr_buflen = be32_to_cpup(p++);
1da177e4
LT		 1267
1268 /* Sorry .. no magic macros for this.. *
1269 * READ_BUF(write->wr_buflen);
1270 * SAVEMEM(write->wr_buf, write->wr_buflen);
1271 */
1272 avail = (char*)argp->end - (char*)argp->p;
1273 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1274 dprintk("NFSD: xdr error (%s:%d)\n",
1275 __FILE__, __LINE__);
1da177e4
LT		 1276 goto xdr_error;
1277 }
70cc7f75
BF		 1278 write->wr_head.iov_base = p;
1279 write->wr_head.iov_len = avail;
70cc7f75 1280 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1281
1282 len = XDR_QUADLEN(write->wr_buflen) << 2;
1283 if (len >= avail) {
1284 int pages;
1285
1286 len -= avail;
1287
1288 pages = len >> PAGE_SHIFT;
1289 argp->pagelist += pages;
1290 argp->pagelen -= pages * PAGE_SIZE;
1291 len -= pages * PAGE_SIZE;
1292
fc788f64 1293 next_decode_page(argp);
1da177e4 1294 }
5a80a54d 1295 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1296
1297 DECODE_TAIL;
1298}
1299
b37ad28b 1300static __be32
1da177e4
LT		 1301nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1302{
1303 DECODE_HEAD;
1304
e1a90ebd
AS		 1305 if (argp->minorversion >= 1)
1306 return nfserr_notsupp;
1307
1da177e4
LT		 1308 READ_BUF(12);
1309 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
06553991 1310 rlockowner->rl_owner.len = be32_to_cpup(p++);
1da177e4
LT		 1311 READ_BUF(rlockowner->rl_owner.len);
1312 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1313
60adfc50
AA		 1314 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1315 return nfserr_inval;
1da177e4
LT		 1316 DECODE_TAIL;
1317}
1318
2db134eb
AA		 1319static __be32
1320nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1321 struct nfsd4_exchange_id *exid)
2db134eb 1322{
5afa040b 1323 int dummy, tmp;
0733d213
AA		 1324 DECODE_HEAD;
1325
1326 READ_BUF(NFS4_VERIFIER_SIZE);
1327 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1328
a084daf5
BF		 1329 status = nfsd4_decode_opaque(argp, &exid->clname);
1330 if (status)
1331 return nfserr_bad_xdr;
0733d213
AA		 1332
1333 READ_BUF(4);
06553991 1334 exid->flags = be32_to_cpup(p++);
0733d213
AA		 1335
1336 /* Ignore state_protect4_a */
1337 READ_BUF(4);
06553991 1338 exid->spa_how = be32_to_cpup(p++);
0733d213
AA		 1339 switch (exid->spa_how) {
1340 case SP4_NONE:
1341 break;
1342 case SP4_MACH_CRED:
1343 /* spo_must_enforce */
ed941643
AE		 1344 status = nfsd4_decode_bitmap(argp,
1345 exid->spo_must_enforce);
1346 if (status)
1347 goto out;
0733d213 1348 /* spo_must_allow */
ed941643
AE		 1349 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
1350 if (status)
1351 goto out;
0733d213
AA		 1352 break;
1353 case SP4_SSV:
1354 /* ssp_ops */
1355 READ_BUF(4);
06553991 1356 dummy = be32_to_cpup(p++);
0733d213
AA		 1357 READ_BUF(dummy * 4);
1358 p += dummy;
1359
1360 READ_BUF(4);
06553991 1361 dummy = be32_to_cpup(p++);
0733d213
AA		 1362 READ_BUF(dummy * 4);
1363 p += dummy;
1364
1365 /* ssp_hash_algs<> */
1366 READ_BUF(4);
06553991 1367 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1368 while (tmp--) {
1369 READ_BUF(4);
06553991 1370 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1371 READ_BUF(dummy);
1372 p += XDR_QUADLEN(dummy);
1373 }
0733d213
AA		 1374
1375 /* ssp_encr_algs<> */
1376 READ_BUF(4);
06553991 1377 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1378 while (tmp--) {
1379 READ_BUF(4);
06553991 1380 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1381 READ_BUF(dummy);
1382 p += XDR_QUADLEN(dummy);
1383 }
0733d213 1384
5ed96bc5 1385 /* ignore ssp_window and ssp_num_gss_handles: */
0733d213 1386 READ_BUF(8);
0733d213
AA		 1387 break;
1388 default:
1389 goto xdr_error;
1390 }
1391
0733d213 1392 READ_BUF(4); /* nfs_impl_id4 array length */
06553991 1393 dummy = be32_to_cpup(p++);
0733d213
AA		 1394
1395 if (dummy > 1)
1396 goto xdr_error;
1397
1398 if (dummy == 1) {
79123444
BF		 1399 status = nfsd4_decode_opaque(argp, &exid->nii_domain);
1400 if (status)
1401 goto xdr_error;
0733d213
AA		 1402
1403 /* nii_name */
79123444
BF		 1404 status = nfsd4_decode_opaque(argp, &exid->nii_name);
1405 if (status)
1406 goto xdr_error;
0733d213
AA		 1407
1408 /* nii_date */
79123444
BF		 1409 status = nfsd4_decode_time(argp, &exid->nii_time);
1410 if (status)
1411 goto xdr_error;
0733d213
AA		 1412 }
1413 DECODE_TAIL;
2db134eb
AA		 1414}
1415
1416static __be32
1417nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1418 struct nfsd4_create_session *sess)
1419{
ec6b5d7b 1420 DECODE_HEAD;
ec6b5d7b 1421 u32 dummy;
ec6b5d7b
AA		 1422
1423 READ_BUF(16);
1424 COPYMEM(&sess->clientid, 8);
06553991
BF		 1425 sess->seqid = be32_to_cpup(p++);
1426 sess->flags = be32_to_cpup(p++);
ec6b5d7b
AA		 1427
1428 /* Fore channel attrs */
1429 READ_BUF(28);
06553991
BF		 1430 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1431 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1432 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1433 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1434 sess->fore_channel.maxops = be32_to_cpup(p++);
1435 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1436 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1437 if (sess->fore_channel.nr_rdma_attrs == 1) {
1438 READ_BUF(4);
06553991 1439 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1440 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1441 dprintk("Too many fore channel attr bitmaps!\n");
1442 goto xdr_error;
1443 }
1444
1445 /* Back channel attrs */
1446 READ_BUF(28);
06553991
BF		 1447 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1448 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1449 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1450 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1451 sess->back_channel.maxops = be32_to_cpup(p++);
1452 sess->back_channel.maxreqs = be32_to_cpup(p++);
1453 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1454 if (sess->back_channel.nr_rdma_attrs == 1) {
1455 READ_BUF(4);
06553991 1456 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1457 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1458 dprintk("Too many back channel attr bitmaps!\n");
1459 goto xdr_error;
1460 }
1461
acb2887e 1462 READ_BUF(4);
06553991 1463 sess->callback_prog = be32_to_cpup(p++);
acb2887e 1464 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1465 DECODE_TAIL;
2db134eb
AA		 1466}
1467
1468static __be32
1469nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1470 struct nfsd4_destroy_session *destroy_session)
1471{
e10e0cfc
BH		 1472 DECODE_HEAD;
1473 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1474 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1475
1476 DECODE_TAIL;
2db134eb
AA		 1477}
1478
e1ca12df
BS		 1479static __be32
1480nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1481 struct nfsd4_free_stateid *free_stateid)
1482{
1483 DECODE_HEAD;
1484
1485 READ_BUF(sizeof(stateid_t));
06553991 1486 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
e1ca12df
BS		 1487 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1488
1489 DECODE_TAIL;
1490}
1491
2db134eb
AA		 1492static __be32
1493nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1494 struct nfsd4_sequence *seq)
1495{
b85d4c01
BH		 1496 DECODE_HEAD;
1497
1498 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1499 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991
BF		 1500 seq->seqid = be32_to_cpup(p++);
1501 seq->slotid = be32_to_cpup(p++);
1502 seq->maxslots = be32_to_cpup(p++);
1503 seq->cachethis = be32_to_cpup(p++);
b85d4c01
BH		 1504
1505 DECODE_TAIL;
2db134eb
AA		 1506}
1507
17456804
BS		 1508static __be32
1509nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1510{
17456804 1511 int i;
03cfb420
BS		 1512 __be32 *p, status;
1513 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1514
1515 READ_BUF(4);
1516 test_stateid->ts_num_ids = ntohl(*p++);
1517
03cfb420 1518 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1519
1520 for (i = 0; i < test_stateid->ts_num_ids; i++) {
d5e23383 1521 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
03cfb420 1522 if (!stateid) {
afcf6792 1523 status = nfserrno(-ENOMEM);
03cfb420
BS		 1524 goto out;
1525 }
1526
03cfb420
BS		 1527 INIT_LIST_HEAD(&stateid->ts_id_list);
1528 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1529
1530 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1531 if (status)
03cfb420 1532 goto out;
17456804
BS		 1533 }
1534
1535 status = 0;
1536out:
1537 return status;
1538xdr_error:
1539 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1540 status = nfserr_bad_xdr;
1541 goto out;
1542}
1543
345c2842
MJ		 1544static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1545{
1546 DECODE_HEAD;
1547
1548 READ_BUF(8);
1549 COPYMEM(&dc->clientid, 8);
1550
1551 DECODE_TAIL;
1552}
1553
4dc6ec00
BF		 1554static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1555{
1556 DECODE_HEAD;
1557
1558 READ_BUF(4);
06553991 1559 rc->rca_one_fs = be32_to_cpup(p++);
4dc6ec00
BF		 1560
1561 DECODE_TAIL;
1562}
1563
9cf514cc
CH		 1564#ifdef CONFIG_NFSD_PNFS
1565static __be32
1566nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1567 struct nfsd4_getdeviceinfo *gdev)
1568{
1569 DECODE_HEAD;
1570 u32 num, i;
1571
1572 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1573 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1574 gdev->gd_layout_type = be32_to_cpup(p++);
1575 gdev->gd_maxcount = be32_to_cpup(p++);
1576 num = be32_to_cpup(p++);
1577 if (num) {
3171822f
SM		 1578 if (num > 1000)
1579 goto xdr_error;
9cf514cc
CH		 1580 READ_BUF(4 * num);
1581 gdev->gd_notify_types = be32_to_cpup(p++);
1582 for (i = 1; i < num; i++) {
1583 if (be32_to_cpup(p++)) {
1584 status = nfserr_inval;
1585 goto out;
1586 }
1587 }
1588 }
1589 DECODE_TAIL;
1590}
1591
1592static __be32
1593nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1594 struct nfsd4_layoutget *lgp)
1595{
1596 DECODE_HEAD;
1597
1598 READ_BUF(36);
1599 lgp->lg_signal = be32_to_cpup(p++);
1600 lgp->lg_layout_type = be32_to_cpup(p++);
1601 lgp->lg_seg.iomode = be32_to_cpup(p++);
1602 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1603 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1604 p = xdr_decode_hyper(p, &lgp->lg_minlength);
db59c0ef
KM		 1605
1606 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1607 if (status)
1608 return status;
1609
9cf514cc
CH		 1610 READ_BUF(4);
1611 lgp->lg_maxcount = be32_to_cpup(p++);
1612
1613 DECODE_TAIL;
1614}
1615
1616static __be32
1617nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1618 struct nfsd4_layoutcommit *lcp)
1619{
1620 DECODE_HEAD;
1621 u32 timechange;
1622
1623 READ_BUF(20);
1624 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1625 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1626 lcp->lc_reclaim = be32_to_cpup(p++);
db59c0ef
KM		 1627
1628 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1629 if (status)
1630 return status;
1631
9cf514cc
CH		 1632 READ_BUF(4);
1633 lcp->lc_newoffset = be32_to_cpup(p++);
1634 if (lcp->lc_newoffset) {
1635 READ_BUF(8);
1636 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1637 } else
1638 lcp->lc_last_wr = 0;
1639 READ_BUF(4);
1640 timechange = be32_to_cpup(p++);
1641 if (timechange) {
1642 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1643 if (status)
1644 return status;
1645 } else {
1646 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1647 }
1648 READ_BUF(8);
1649 lcp->lc_layout_type = be32_to_cpup(p++);
1650
1651 /*
1652 * Save the layout update in XDR format and let the layout driver deal
1653 * with it later.
1654 */
1655 lcp->lc_up_len = be32_to_cpup(p++);
1656 if (lcp->lc_up_len > 0) {
1657 READ_BUF(lcp->lc_up_len);
1658 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1659 }
1660
1661 DECODE_TAIL;
1662}
1663
1664static __be32
1665nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1666 struct nfsd4_layoutreturn *lrp)
1667{
1668 DECODE_HEAD;
1669
1670 READ_BUF(16);
1671 lrp->lr_reclaim = be32_to_cpup(p++);
1672 lrp->lr_layout_type = be32_to_cpup(p++);
1673 lrp->lr_seg.iomode = be32_to_cpup(p++);
1674 lrp->lr_return_type = be32_to_cpup(p++);
1675 if (lrp->lr_return_type == RETURN_FILE) {
1676 READ_BUF(16);
1677 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1678 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
db59c0ef
KM		 1679
1680 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1681 if (status)
1682 return status;
1683
9cf514cc
CH		 1684 READ_BUF(4);
1685 lrp->lrf_body_len = be32_to_cpup(p++);
1686 if (lrp->lrf_body_len > 0) {
1687 READ_BUF(lrp->lrf_body_len);
1688 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1689 }
1690 } else {
1691 lrp->lr_seg.offset = 0;
1692 lrp->lr_seg.length = NFS4_MAX_UINT64;
1693 }
1694
1695 DECODE_TAIL;
1696}
1697#endif /* CONFIG_NFSD_PNFS */
1698
95d871f0
AS		 1699static __be32
1700nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1701 struct nfsd4_fallocate *fallocate)
1702{
1703 DECODE_HEAD;
1704
1705 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1706 if (status)
1707 return status;
1708
1709 READ_BUF(16);
1710 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1711 xdr_decode_hyper(p, &fallocate->falloc_length);
1712
1713 DECODE_TAIL;
1714}
1715
ffa0160a
CH		 1716static __be32
1717nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1718{
1719 DECODE_HEAD;
1720
1721 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1722 if (status)
1723 return status;
1724 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1725 if (status)
1726 return status;
1727
1728 READ_BUF(8 + 8 + 8);
1729 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1730 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1731 p = xdr_decode_hyper(p, &clone->cl_count);
1732 DECODE_TAIL;
1733}
1734
29ae7f9d
AS		 1735static __be32
1736nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1737{
1738 DECODE_HEAD;
1739 unsigned int tmp;
1740
1741 status = nfsd4_decode_stateid(argp, &copy->cp_src_stateid);
1742 if (status)
1743 return status;
1744 status = nfsd4_decode_stateid(argp, &copy->cp_dst_stateid);
1745 if (status)
1746 return status;
1747
1748 READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
1749 p = xdr_decode_hyper(p, &copy->cp_src_pos);
1750 p = xdr_decode_hyper(p, &copy->cp_dst_pos);
1751 p = xdr_decode_hyper(p, &copy->cp_count);
edcc8452 1752 p++; /* ca_consecutive: we always do consecutive copies */
29ae7f9d
AS		 1753 copy->cp_synchronous = be32_to_cpup(p++);
1754 tmp = be32_to_cpup(p); /* Source server list not supported */
1755
1756 DECODE_TAIL;
1757}
1758
6308bc98
OK		 1759static __be32
1760nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
1761 struct nfsd4_offload_status *os)
1762{
1763 return nfsd4_decode_stateid(argp, &os->stateid);
1764}
1765
24bab491
AS		 1766static __be32
1767nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1768{
1769 DECODE_HEAD;
1770
1771 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1772 if (status)
1773 return status;
1774
1775 READ_BUF(8 + 4);
1776 p = xdr_decode_hyper(p, &seek->seek_offset);
1777 seek->seek_whence = be32_to_cpup(p);
1778
1779 DECODE_TAIL;
1780}
1781
347e0ad9
BH		 1782static __be32
1783nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1784{
1785 return nfs_ok;
1786}
1787
3c375c6f
BH		 1788static __be32
1789nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1790{
1e685ec2 1791 return nfserr_notsupp;
3c375c6f
BH		 1792}
1793
347e0ad9
BH		 1794typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1795
c1df609d 1796static const nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1797 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1798 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1799 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1800 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1801 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1802 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1803 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1804 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1805 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1806 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1807 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1808 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1809 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1810 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1811 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1812 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1813 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1814 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1815 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1816 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1817 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1818 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1819 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1820 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1821 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1822 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1823 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1824 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1825 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1826 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1827 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1828 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1829 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1830 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1831 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1832 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1833 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1834
1835 /* new operations for NFSv4.1 */
cb73a9f4 1836 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1837 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1838 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1839 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1840 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1841 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae 1842 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc
CH		 1843#ifdef CONFIG_NFSD_PNFS
1844 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1845 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1846 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1847 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1848 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1849#else
9064caae
RD		 1850 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1851 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1852 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1853 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1854 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc 1855#endif
04f4ad16 1856 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1857 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1858 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1859 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1860 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1861 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1862 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
87a15a80
AS		 1863
1864 /* new operations for NFSv4.2 */
95d871f0 1865 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
29ae7f9d 1866 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
87a15a80 1867 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
b0cb9085 1868 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
87a15a80
AS		 1869 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1870 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1871 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
885e2bf3 1872 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status,
6308bc98 1873 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status,
87a15a80 1874 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
24bab491 1875 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
87a15a80 1876 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
ffa0160a 1877 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
2db134eb
AA		 1878};
1879
e1a90ebd
AS		 1880static inline bool
1881nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1882{
8217d146 1883 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1884 return false;
8217d146 1885 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1886 return false;
8217d146
AS		 1887 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1888 return false;
1889 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1890 return false;
1891 return true;
1892}
f2feb96b 1893
b37ad28b 1894static __be32
1da177e4
LT		 1895nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1896{
1897 DECODE_HEAD;
1898 struct nfsd4_op *op;
1091006c 1899 bool cachethis = false;
a5cddc88
BF		 1900 int auth_slack= argp->rqstp->rq_auth_slack;
1901 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 1902 int readcount = 0;
1903 int readbytes = 0;
1da177e4
LT		 1904 int i;
1905
1da177e4 1906 READ_BUF(4);
06553991 1907 argp->taglen = be32_to_cpup(p++);
4aed9c46 1908 READ_BUF(argp->taglen);
1da177e4 1909 SAVEMEM(argp->tag, argp->taglen);
4aed9c46 1910 READ_BUF(8);
06553991
BF		 1911 argp->minorversion = be32_to_cpup(p++);
1912 argp->opcnt = be32_to_cpup(p++);
4f0cefbf 1913 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 1914
1915 if (argp->taglen > NFSD4_MAX_TAGLEN)
1916 goto xdr_error;
0078117c
BF		 1917 /*
1918 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
1919 * here, so we return success at the xdr level so that
1920 * nfsd4_proc can handle this is an NFS-level error.
1921 */
1922 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
1923 return 0;
1da177e4 1924
e8c96f8c 1925 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
5d6031ca 1926 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1da177e4
LT		 1927 if (!argp->ops) {
1928 argp->ops = argp->iops;
817cb9d4 1929 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1930 goto xdr_error;
1931 }
1932 }
1933
e1a90ebd 1934 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1935 argp->opcnt = 0;
1936
1da177e4
LT		 1937 for (i = 0; i < argp->opcnt; i++) {
1938 op = &argp->ops[i];
1939 op->replay = NULL;
1940
8a61b18c 1941 READ_BUF(4);
06553991 1942 op->opnum = be32_to_cpup(p++);
1da177e4 1943
e1a90ebd
AS		 1944 if (nfsd4_opnum_in_range(argp, op))
1945 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1946 else {
1da177e4
LT		 1947 op->opnum = OP_ILLEGAL;
1948 op->status = nfserr_op_illegal;
1da177e4 1949 }
f4f9ef4a 1950 op->opdesc = OPDESC(op);
1091006c
BF		 1951 /*
1952 * We'll try to cache the result in the DRC if any one
1953 * op in the compound wants to be cached:
1954 */
1955 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 1956
b0e35fda
BF		 1957 if (op->opnum == OP_READ) {
1958 readcount++;
1959 readbytes += nfsd4_max_reply(argp->rqstp, op);
1960 } else
1961 max_reply += nfsd4_max_reply(argp->rqstp, op);
f7b43d0c 1962 /*
7323f0d2
KM		 1963 * OP_LOCK and OP_LOCKT may return a conflicting lock.
1964 * (Special case because it will just skip encoding this
1965 * if it runs out of xdr buffer space, and it is the only
1966 * operation that behaves this way.)
f7b43d0c 1967 */
7323f0d2 1968 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
f7b43d0c 1969 max_reply += NFS4_OPAQUE_LIMIT;
e372ba60
BF		 1970
1971 if (op->status) {
1972 argp->opcnt = i+1;
1973 break;
1974 }
1da177e4 1975 }
1091006c
BF		 1976 /* Sessions make the DRC unnecessary: */
1977 if (argp->minorversion)
1978 cachethis = false;
b0e35fda 1979 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 1980 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 1981
a5cddc88 1982 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
779fb0f3 1983 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
b0e35fda 1984
1da177e4
LT		 1985 DECODE_TAIL;
1986}
1da177e4 1987
b8800921
N		 1988static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
1989 struct svc_export *exp)
c654b8a9 1990{
b8800921
N		 1991 if (exp->ex_flags & NFSEXP_V4ROOT) {
1992 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
1993 *p++ = 0;
1994 } else if (IS_I_VERSION(inode)) {
39ca1bf6 1995 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
c654b8a9 1996 } else {
d05d5744
BF		 1997 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1998 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
c654b8a9 1999 }
d05d5744 2000 return p;
c654b8a9
BF		 2001}
2002
16945141
BF		 2003/*
2004 * ctime (in NFSv4, time_metadata) is not writeable, and the client
2005 * doesn't really care what resolution could theoretically be stored by
2006 * the filesystem.
2007 *
2008 * The client cares how close together changes can be while still
2009 * guaranteeing ctime changes. For most filesystems (which have
2010 * timestamps with nanosecond fields) that is limited by the resolution
2011 * of the time returned from current_time() (which I'm assuming to be
2012 * 1/HZ).
2013 */
2014static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
2015{
2016 struct timespec ts;
2017 u32 ns;
2018
2019 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
2020 ts = ns_to_timespec(ns);
2021
2022 p = xdr_encode_hyper(p, ts.tv_sec);
2023 *p++ = cpu_to_be32(ts.tv_nsec);
2024
2025 return p;
2026}
2027
d05d5744 2028static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 2029{
d05d5744 2030 *p++ = cpu_to_be32(c->atomic);
c654b8a9 2031 if (c->change_supported) {
d05d5744
BF		 2032 p = xdr_encode_hyper(p, c->before_change);
2033 p = xdr_encode_hyper(p, c->after_change);
c654b8a9 2034 } else {
d05d5744
BF		 2035 *p++ = cpu_to_be32(c->before_ctime_sec);
2036 *p++ = cpu_to_be32(c->before_ctime_nsec);
2037 *p++ = cpu_to_be32(c->after_ctime_sec);
2038 *p++ = cpu_to_be32(c->after_ctime_nsec);
c654b8a9 2039 }
d05d5744 2040 return p;
c654b8a9 2041}
1da177e4 2042
81c3f413 2043/* Encode as an array of strings the string given with components
e7a0444a 2044 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 2045 */
ddd1ea56
BF		 2046static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2047 char *components, char esc_enter,
2048 char esc_exit)
81c3f413 2049{
ddd1ea56 2050 __be32 *p;
082d4bd7
BF		 2051 __be32 pathlen;
2052 int pathlen_offset;
81c3f413 2053 int strlen, count=0;
e7a0444a 2054 char *str, *end, *next;
81c3f413
BF		 2055
2056 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 2057
2058 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 2059 p = xdr_reserve_space(xdr, 4);
2060 if (!p)
81c3f413 2061 return nfserr_resource;
082d4bd7
BF		 2062 p++; /* We will fill this in with @count later */
2063
81c3f413
BF		 2064 end = str = components;
2065 while (*end) {
e7a0444a
WAA		 2066 bool found_esc = false;
2067
2068 /* try to parse as esc_start, ..., esc_end, sep */
2069 if (*str == esc_enter) {
2070 for (; *end && (*end != esc_exit); end++)
2071 /* find esc_exit or end of string */;
2072 next = end + 1;
2073 if (*end && (!*next || *next == sep)) {
2074 str++;
2075 found_esc = true;
2076 }
2077 }
2078
2079 if (!found_esc)
2080 for (; *end && (*end != sep); end++)
2081 /* find sep or end of string */;
2082
81c3f413
BF		 2083 strlen = end - str;
2084 if (strlen) {
ddd1ea56
BF		 2085 p = xdr_reserve_space(xdr, strlen + 4);
2086 if (!p)
81c3f413 2087 return nfserr_resource;
0c0c267b 2088 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 2089 count++;
2090 }
2091 else
2092 end++;
5a64e569
BC		 2093 if (found_esc)
2094 end = next;
2095
81c3f413
BF		 2096 str = end;
2097 }
bf7491f1 2098 pathlen = htonl(count);
082d4bd7 2099 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 2100 return 0;
2101}
2102
e7a0444a
WAA		 2103/* Encode as an array of strings the string given with components
2104 * separated @sep.
2105 */
ddd1ea56
BF		 2106static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2107 char *components)
e7a0444a 2108{
ddd1ea56 2109 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 2110}
2111
81c3f413
BF		 2112/*
2113 * encode a location element of a fs_locations structure
2114 */
ddd1ea56
BF		 2115static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2116 struct nfsd4_fs_location *location)
81c3f413 2117{
b37ad28b 2118 __be32 status;
81c3f413 2119
ddd1ea56 2120 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 2121 '[', ']');
81c3f413
BF		 2122 if (status)
2123 return status;
ddd1ea56 2124 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 2125 if (status)
2126 return status;
81c3f413
BF		 2127 return 0;
2128}
2129
2130/*
ed748aac 2131 * Encode a path in RFC3530 'pathname4' format
81c3f413 2132 */
ddd1ea56
BF		 2133static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2134 const struct path *root,
2135 const struct path *path)
81c3f413 2136{
301f0268 2137 struct path cur = *path;
ddd1ea56 2138 __be32 *p;
ed748aac
TM		 2139 struct dentry **components = NULL;
2140 unsigned int ncomponents = 0;
2141 __be32 err = nfserr_jukebox;
81c3f413 2142
ed748aac 2143 dprintk("nfsd4_encode_components(");
81c3f413 2144
ed748aac
TM		 2145 path_get(&cur);
2146 /* First walk the path up to the nfsd root, and store the
2147 * dentries/path components in an array.
2148 */
2149 for (;;) {
b77a4b2e 2150 if (path_equal(&cur, root))
ed748aac
TM		 2151 break;
2152 if (cur.dentry == cur.mnt->mnt_root) {
2153 if (follow_up(&cur))
2154 continue;
2155 goto out_free;
2156 }
2157 if ((ncomponents & 15) == 0) {
2158 struct dentry **new;
2159 new = krealloc(components,
2160 sizeof(*new) * (ncomponents + 16),
2161 GFP_KERNEL);
2162 if (!new)
2163 goto out_free;
2164 components = new;
2165 }
2166 components[ncomponents++] = cur.dentry;
2167 cur.dentry = dget_parent(cur.dentry);
2168 }
ddd1ea56
BF		 2169 err = nfserr_resource;
2170 p = xdr_reserve_space(xdr, 4);
2171 if (!p)
ed748aac 2172 goto out_free;
c373b0a4 2173 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 2174
2175 while (ncomponents) {
2176 struct dentry *dentry = components[ncomponents - 1];
301f0268 2177 unsigned int len;
ed748aac 2178
301f0268
AV		 2179 spin_lock(&dentry->d_lock);
2180 len = dentry->d_name.len;
ddd1ea56
BF		 2181 p = xdr_reserve_space(xdr, len + 4);
2182 if (!p) {
301f0268 2183 spin_unlock(&dentry->d_lock);
ed748aac 2184 goto out_free;
301f0268 2185 }
0c0c267b 2186 p = xdr_encode_opaque(p, dentry->d_name.name, len);
a455589f 2187 dprintk("/%pd", dentry);
301f0268 2188 spin_unlock(&dentry->d_lock);
ed748aac
TM		 2189 dput(dentry);
2190 ncomponents--;
81c3f413 2191 }
ed748aac 2192
ed748aac
TM		 2193 err = 0;
2194out_free:
2195 dprintk(")\n");
2196 while (ncomponents)
2197 dput(components[--ncomponents]);
2198 kfree(components);
2199 path_put(&cur);
2200 return err;
2201}
2202
ddd1ea56
BF		 2203static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2204 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 2205{
2206 struct svc_export *exp_ps;
2207 __be32 res;
2208
2209 exp_ps = rqst_find_fsidzero_export(rqstp);
2210 if (IS_ERR(exp_ps))
2211 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 2212 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 2213 exp_put(exp_ps);
2214 return res;
81c3f413
BF		 2215}
2216
2217/*
2218 * encode a fs_locations structure
2219 */
ddd1ea56
BF		 2220static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2221 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 2222{
b37ad28b 2223 __be32 status;
cc45f017 2224 int i;
ddd1ea56 2225 __be32 *p;
81c3f413 2226 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 2227
ddd1ea56 2228 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 2229 if (status)
2230 return status;
ddd1ea56
BF		 2231 p = xdr_reserve_space(xdr, 4);
2232 if (!p)
81c3f413 2233 return nfserr_resource;
c373b0a4 2234 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 2235 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 2236 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 2237 if (status)
2238 return status;
2239 }
81c3f413
BF		 2240 return 0;
2241}
1da177e4 2242
3d2544b1
BF		 2243static u32 nfs4_file_type(umode_t mode)
2244{
2245 switch (mode & S_IFMT) {
2246 case S_IFIFO: return NF4FIFO;
2247 case S_IFCHR: return NF4CHR;
2248 case S_IFDIR: return NF4DIR;
2249 case S_IFBLK: return NF4BLK;
2250 case S_IFLNK: return NF4LNK;
2251 case S_IFREG: return NF4REG;
2252 case S_IFSOCK: return NF4SOCK;
2253 default: return NF4BAD;
2254 };
2255}
1da177e4 2256
b37ad28b 2257static inline __be32
ddd1ea56
BF		 2258nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2259 struct nfs4_ace *ace)
1da177e4 2260{
3554116d 2261 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 2262 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 2263 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 2264 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 2265 else
ddd1ea56 2266 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 2267}
2268
6896f15a 2269static inline __be32
8a4c3926 2270nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
6896f15a 2271{
8a4c3926
JL		 2272 __be32 *p;
2273 unsigned long i = hweight_long(layout_types);
6896f15a 2274
8a4c3926
JL		 2275 p = xdr_reserve_space(xdr, 4 + 4 * i);
2276 if (!p)
2277 return nfserr_resource;
2278
2279 *p++ = cpu_to_be32(i);
2280
2281 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2282 if (layout_types & (1 << i))
2283 *p++ = cpu_to_be32(i);
6896f15a
KM		 2284
2285 return 0;
2286}
2287
42ca0993
BF		 2288#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2289 FATTR4_WORD0_RDATTR_ERROR)
2290#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
c2227a39 2291#define WORD2_ABSENT_FS_ATTRS 0
42ca0993 2292
18032ca0
DQ		 2293#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2294static inline __be32
ddd1ea56
BF		 2295nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2296 void *context, int len)
18032ca0 2297{
ddd1ea56 2298 __be32 *p;
18032ca0 2299
ddd1ea56
BF		 2300 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2301 if (!p)
18032ca0
DQ		 2302 return nfserr_resource;
2303
2304 /*
2305 * For now we use a 0 here to indicate the null translation; in
2306 * the future we may place a call to translation code here.
2307 */
c373b0a4
BF		 2308 *p++ = cpu_to_be32(0); /* lfs */
2309 *p++ = cpu_to_be32(0); /* pi */
18032ca0 2310 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 2311 return 0;
2312}
2313#else
2314static inline __be32
ddd1ea56
BF		 2315nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2316 void *context, int len)
18032ca0
DQ		 2317{ return 0; }
2318#endif
2319
c2227a39 2320static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
42ca0993
BF		 2321{
2322 /* As per referral draft: */
2323 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2324 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2325 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2326 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2327 *rdattr_err = NFSERR_MOVED;
2328 else
2329 return nfserr_moved;
2330 }
2331 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2332 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
c2227a39 2333 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
42ca0993
BF		 2334 return 0;
2335}
1da177e4 2336
ae7095a7
BF		 2337
2338static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2339{
2340 struct path path = exp->ex_path;
2341 int err;
2342
2343 path_get(&path);
2344 while (follow_up(&path)) {
2345 if (path.dentry != path.mnt->mnt_root)
2346 break;
2347 }
a528d35e 2348 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
ae7095a7
BF		 2349 path_put(&path);
2350 return err;
2351}
2352
75976de6
KM		 2353static __be32
2354nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2355{
2356 __be32 *p;
2357
2358 if (bmval2) {
2359 p = xdr_reserve_space(xdr, 16);
2360 if (!p)
2361 goto out_resource;
2362 *p++ = cpu_to_be32(3);
2363 *p++ = cpu_to_be32(bmval0);
2364 *p++ = cpu_to_be32(bmval1);
2365 *p++ = cpu_to_be32(bmval2);
2366 } else if (bmval1) {
2367 p = xdr_reserve_space(xdr, 12);
2368 if (!p)
2369 goto out_resource;
2370 *p++ = cpu_to_be32(2);
2371 *p++ = cpu_to_be32(bmval0);
2372 *p++ = cpu_to_be32(bmval1);
2373 } else {
2374 p = xdr_reserve_space(xdr, 8);
2375 if (!p)
2376 goto out_resource;
2377 *p++ = cpu_to_be32(1);
2378 *p++ = cpu_to_be32(bmval0);
2379 }
2380
2381 return 0;
2382out_resource:
2383 return nfserr_resource;
2384}
2385
1da177e4
LT		 2386/*
2387 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2388 * ourselves.
1da177e4 2389 */
da2ebce6 2390static __be32
d5184658
BF		 2391nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2392 struct svc_export *exp,
2393 struct dentry *dentry, u32 *bmval,
406a7ea9 2394 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2395{
2396 u32 bmval0 = bmval[0];
2397 u32 bmval1 = bmval[1];
7e705706 2398 u32 bmval2 = bmval[2];
1da177e4 2399 struct kstat stat;
d50e6136 2400 struct svc_fh *tempfh = NULL;
1da177e4 2401 struct kstatfs statfs;
ddd1ea56 2402 __be32 *p;
1fcea5b2 2403 int starting_len = xdr->buf->len;
082d4bd7
BF		 2404 int attrlen_offset;
2405 __be32 attrlen;
1da177e4
LT		 2406 u32 dummy;
2407 u64 dummy64;
42ca0993 2408 u32 rdattr_err = 0;
b37ad28b 2409 __be32 status;
b8dd7b9a 2410 int err;
1da177e4 2411 struct nfs4_acl *acl = NULL;
0ab88ca4 2412#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2413 void *context = NULL;
2414 int contextlen;
0ab88ca4 2415#endif
18032ca0 2416 bool contextsupport = false;
7e705706
AA		 2417 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2418 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2419 struct path path = {
2420 .mnt = exp->ex_path.mnt,
2421 .dentry = dentry,
2422 };
3d733711 2423 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2424
2425 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
916d2d84 2426 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
1da177e4 2427
42ca0993 2428 if (exp->ex_fslocs.migrated) {
c2227a39 2429 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
42ca0993
BF		 2430 if (status)
2431 goto out;
2432 }
2433
a528d35e 2434 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
b8dd7b9a 2435 if (err)
1da177e4 2436 goto out_nfserr;
12337901
CH		 2437 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2438 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2439 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2440 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2441 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2442 if (err)
1da177e4
LT		 2443 goto out_nfserr;
2444 }
2445 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2446 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2447 status = nfserr_jukebox;
2448 if (!tempfh)
2449 goto out;
2450 fh_init(tempfh, NFS4_FHSIZE);
2451 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2452 if (status)
2453 goto out;
d50e6136 2454 fhp = tempfh;
1da177e4 2455 }
0c9d65e7 2456 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2457 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
0c9d65e7
AG		 2458 if (err == -EOPNOTSUPP)
2459 bmval0 &= ~FATTR4_WORD0_ACL;
2460 else if (err == -EINVAL) {
2461 status = nfserr_attrnotsupp;
2462 goto out;
2463 } else if (err != 0)
2464 goto out_nfserr;
1da177e4 2465 }
1da177e4 2466
18032ca0 2467#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
c2227a39
KM		 2468 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2469 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
32ddd944
BF		 2470 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2471 err = security_inode_getsecctx(d_inode(dentry),
18032ca0 2472 &context, &contextlen);
32ddd944
BF		 2473 else
2474 err = -EOPNOTSUPP;
18032ca0
DQ		 2475 contextsupport = (err == 0);
2476 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2477 if (err == -EOPNOTSUPP)
2478 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2479 else if (err)
2480 goto out_nfserr;
2481 }
2482 }
2483#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2484
75976de6
KM		 2485 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2486 if (status)
2487 goto out;
082d4bd7
BF		 2488
2489 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2490 p = xdr_reserve_space(xdr, 4);
2491 if (!p)
2492 goto out_resource;
082d4bd7 2493 p++; /* to be backfilled later */
1da177e4
LT		 2494
2495 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
dcd20869
BF		 2496 u32 supp[3];
2497
2498 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
7e705706 2499
0c9d65e7 2500 if (!IS_POSIXACL(dentry->d_inode))
916d2d84 2501 supp[0] &= ~FATTR4_WORD0_ACL;
18032ca0 2502 if (!contextsupport)
916d2d84
BF		 2503 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2504 if (!supp[2]) {
ddd1ea56
BF		 2505 p = xdr_reserve_space(xdr, 12);
2506 if (!p)
2b44f1ba 2507 goto out_resource;
c373b0a4 2508 *p++ = cpu_to_be32(2);
916d2d84
BF		 2509 *p++ = cpu_to_be32(supp[0]);
2510 *p++ = cpu_to_be32(supp[1]);
7e705706 2511 } else {
ddd1ea56
BF		 2512 p = xdr_reserve_space(xdr, 16);
2513 if (!p)
2b44f1ba 2514 goto out_resource;
c373b0a4 2515 *p++ = cpu_to_be32(3);
916d2d84
BF		 2516 *p++ = cpu_to_be32(supp[0]);
2517 *p++ = cpu_to_be32(supp[1]);
2518 *p++ = cpu_to_be32(supp[2]);
7e705706 2519 }
1da177e4
LT		 2520 }
2521 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2522 p = xdr_reserve_space(xdr, 4);
2523 if (!p)
1da177e4 2524 goto out_resource;
3d2544b1 2525 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2526 if (dummy == NF4BAD) {
2527 status = nfserr_serverfault;
2528 goto out;
2529 }
c373b0a4 2530 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2531 }
2532 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2533 p = xdr_reserve_space(xdr, 4);
2534 if (!p)
1da177e4 2535 goto out_resource;
49640001 2536 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2537 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2538 else
c373b0a4
BF		 2539 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2540 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2541 }
2542 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2543 p = xdr_reserve_space(xdr, 8);
2544 if (!p)
1da177e4 2545 goto out_resource;
b8800921 2546 p = encode_change(p, &stat, d_inode(dentry), exp);
1da177e4
LT		 2547 }
2548 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2549 p = xdr_reserve_space(xdr, 8);
2550 if (!p)
1da177e4 2551 goto out_resource;
b64c7f3b 2552 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2553 }
2554 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2555 p = xdr_reserve_space(xdr, 4);
2556 if (!p)
1da177e4 2557 goto out_resource;
c373b0a4 2558 *p++ = cpu_to_be32(1);
1da177e4
LT		 2559 }
2560 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2561 p = xdr_reserve_space(xdr, 4);
2562 if (!p)
1da177e4 2563 goto out_resource;
c373b0a4 2564 *p++ = cpu_to_be32(1);
1da177e4
LT		 2565 }
2566 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
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_FSID) {
ddd1ea56
BF		 2573 p = xdr_reserve_space(xdr, 16);
2574 if (!p)
1da177e4 2575 goto out_resource;
42ca0993 2576 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 2577 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2578 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2579 } else switch(fsid_source(fhp)) {
2580 case FSIDSOURCE_FSID:
b64c7f3b
BF		 2581 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2582 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 2583 break;
2584 case FSIDSOURCE_DEV:
c373b0a4
BF		 2585 *p++ = cpu_to_be32(0);
2586 *p++ = cpu_to_be32(MAJOR(stat.dev));
2587 *p++ = cpu_to_be32(0);
2588 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 2589 break;
2590 case FSIDSOURCE_UUID:
94eb3689
KM		 2591 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2592 EX_UUID_LEN);
af6a4e28 2593 break;
1da177e4
LT		 2594 }
2595 }
2596 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2597 p = xdr_reserve_space(xdr, 4);
2598 if (!p)
1da177e4 2599 goto out_resource;
c373b0a4 2600 *p++ = cpu_to_be32(0);
1da177e4
LT		 2601 }
2602 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2603 p = xdr_reserve_space(xdr, 4);
2604 if (!p)
1da177e4 2605 goto out_resource;
c373b0a4 2606 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 2607 }
2608 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2609 p = xdr_reserve_space(xdr, 4);
2610 if (!p)
1da177e4 2611 goto out_resource;
c373b0a4 2612 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 2613 }
2614 if (bmval0 & FATTR4_WORD0_ACL) {
2615 struct nfs4_ace *ace;
1da177e4
LT		 2616
2617 if (acl == NULL) {
ddd1ea56
BF		 2618 p = xdr_reserve_space(xdr, 4);
2619 if (!p)
1da177e4
LT		 2620 goto out_resource;
2621
c373b0a4 2622 *p++ = cpu_to_be32(0);
1da177e4
LT		 2623 goto out_acl;
2624 }
ddd1ea56
BF		 2625 p = xdr_reserve_space(xdr, 4);
2626 if (!p)
1da177e4 2627 goto out_resource;
c373b0a4 2628 *p++ = cpu_to_be32(acl->naces);
1da177e4 2629
28e05dd8 2630 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2631 p = xdr_reserve_space(xdr, 4*3);
2632 if (!p)
1da177e4 2633 goto out_resource;
c373b0a4
BF		 2634 *p++ = cpu_to_be32(ace->type);
2635 *p++ = cpu_to_be32(ace->flag);
2636 *p++ = cpu_to_be32(ace->access_mask &
2637 NFS4_ACE_MASK_ALL);
ddd1ea56 2638 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2639 if (status)
2640 goto out;
2641 }
2642 }
2643out_acl:
2644 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2645 p = xdr_reserve_space(xdr, 4);
2646 if (!p)
1da177e4 2647 goto out_resource;
0c9d65e7 2648 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
1da177e4
LT		 2649 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2650 }
2651 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2652 p = xdr_reserve_space(xdr, 4);
2653 if (!p)
1da177e4 2654 goto out_resource;
c373b0a4 2655 *p++ = cpu_to_be32(1);
1da177e4
LT		 2656 }
2657 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2658 p = xdr_reserve_space(xdr, 4);
2659 if (!p)
1da177e4 2660 goto out_resource;
c373b0a4 2661 *p++ = cpu_to_be32(0);
1da177e4
LT		 2662 }
2663 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2664 p = xdr_reserve_space(xdr, 4);
2665 if (!p)
1da177e4 2666 goto out_resource;
c373b0a4 2667 *p++ = cpu_to_be32(1);
1da177e4
LT		 2668 }
2669 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2670 p = xdr_reserve_space(xdr, 4);
2671 if (!p)
1da177e4 2672 goto out_resource;
c373b0a4 2673 *p++ = cpu_to_be32(1);
1da177e4
LT		 2674 }
2675 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2676 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2677 if (!p)
1da177e4 2678 goto out_resource;
0c0c267b
BF		 2679 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2680 fhp->fh_handle.fh_size);
1da177e4
LT		 2681 }
2682 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2683 p = xdr_reserve_space(xdr, 8);
2684 if (!p)
1da177e4 2685 goto out_resource;
b64c7f3b 2686 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 2687 }
2688 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2689 p = xdr_reserve_space(xdr, 8);
2690 if (!p)
1da177e4 2691 goto out_resource;
b64c7f3b 2692 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2693 }
2694 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2695 p = xdr_reserve_space(xdr, 8);
2696 if (!p)
1da177e4 2697 goto out_resource;
b64c7f3b 2698 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2699 }
2700 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2701 p = xdr_reserve_space(xdr, 8);
2702 if (!p)
1da177e4 2703 goto out_resource;
b64c7f3b 2704 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 2705 }
81c3f413 2706 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2707 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2708 if (status)
2709 goto out;
2710 }
1da177e4 2711 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2712 p = xdr_reserve_space(xdr, 4);
2713 if (!p)
1da177e4 2714 goto out_resource;
c373b0a4 2715 *p++ = cpu_to_be32(1);
1da177e4
LT		 2716 }
2717 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2718 p = xdr_reserve_space(xdr, 8);
2719 if (!p)
1da177e4 2720 goto out_resource;
b64c7f3b 2721 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2722 }
2723 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2724 p = xdr_reserve_space(xdr, 4);
2725 if (!p)
1da177e4 2726 goto out_resource;
c373b0a4 2727 *p++ = cpu_to_be32(255);
1da177e4
LT		 2728 }
2729 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2730 p = xdr_reserve_space(xdr, 4);
2731 if (!p)
1da177e4 2732 goto out_resource;
c373b0a4 2733 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 2734 }
2735 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2736 p = xdr_reserve_space(xdr, 8);
2737 if (!p)
1da177e4 2738 goto out_resource;
b64c7f3b 2739 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2740 }
2741 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2742 p = xdr_reserve_space(xdr, 8);
2743 if (!p)
1da177e4 2744 goto out_resource;
b64c7f3b 2745 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2746 }
2747 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2748 p = xdr_reserve_space(xdr, 4);
2749 if (!p)
1da177e4 2750 goto out_resource;
c373b0a4 2751 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 2752 }
2753 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2754 p = xdr_reserve_space(xdr, 4);
2755 if (!p)
1da177e4 2756 goto out_resource;
c373b0a4 2757 *p++ = cpu_to_be32(1);
1da177e4
LT		 2758 }
2759 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2760 p = xdr_reserve_space(xdr, 4);
2761 if (!p)
1da177e4 2762 goto out_resource;
c373b0a4 2763 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 2764 }
2765 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2766 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2767 if (status)
2768 goto out;
2769 }
2770 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2771 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2772 if (status)
2773 goto out;
2774 }
2775 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2776 p = xdr_reserve_space(xdr, 8);
2777 if (!p)
1da177e4 2778 goto out_resource;
c373b0a4
BF		 2779 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2780 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 2781 }
2782 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2783 p = xdr_reserve_space(xdr, 8);
2784 if (!p)
1da177e4
LT		 2785 goto out_resource;
2786 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 2787 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2788 }
2789 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2790 p = xdr_reserve_space(xdr, 8);
2791 if (!p)
1da177e4
LT		 2792 goto out_resource;
2793 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 2794 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2795 }
2796 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2797 p = xdr_reserve_space(xdr, 8);
2798 if (!p)
1da177e4
LT		 2799 goto out_resource;
2800 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 2801 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2802 }
2803 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2804 p = xdr_reserve_space(xdr, 8);
2805 if (!p)
1da177e4
LT		 2806 goto out_resource;
2807 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 2808 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2809 }
2810 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2811 p = xdr_reserve_space(xdr, 12);
2812 if (!p)
1da177e4 2813 goto out_resource;
b64c7f3b 2814 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 2815 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 2816 }
2817 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2818 p = xdr_reserve_space(xdr, 12);
2819 if (!p)
1da177e4 2820 goto out_resource;
16945141 2821 p = encode_time_delta(p, d_inode(dentry));
1da177e4
LT		 2822 }
2823 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2824 p = xdr_reserve_space(xdr, 12);
2825 if (!p)
1da177e4 2826 goto out_resource;
b64c7f3b 2827 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 2828 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 2829 }
2830 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2831 p = xdr_reserve_space(xdr, 12);
2832 if (!p)
1da177e4 2833 goto out_resource;
b64c7f3b 2834 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 2835 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 2836 }
2837 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
0a2050d7
KM		 2838 struct kstat parent_stat;
2839 u64 ino = stat.ino;
2840
ddd1ea56
BF		 2841 p = xdr_reserve_space(xdr, 8);
2842 if (!p)
1da177e4 2843 goto out_resource;
406a7ea9
FF		 2844 /*
2845 * Get parent's attributes if not ignoring crossmount
2846 * and this is the root of a cross-mounted filesystem.
2847 */
2848 if (ignore_crossmnt == 0 &&
0a2050d7
KM		 2849 dentry == exp->ex_path.mnt->mnt_root) {
2850 err = get_parent_attributes(exp, &parent_stat);
2851 if (err)
2852 goto out_nfserr;
2853 ino = parent_stat.ino;
2854 }
2855 p = xdr_encode_hyper(p, ino);
1da177e4 2856 }
9cf514cc 2857#ifdef CONFIG_NFSD_PNFS
6896f15a 2858 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
8a4c3926 2859 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 2860 if (status)
2861 goto out;
2862 }
2863
2864 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
8a4c3926 2865 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 2866 if (status)
2867 goto out;
9cf514cc
CH		 2868 }
2869
2870 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2871 p = xdr_reserve_space(xdr, 4);
2872 if (!p)
2873 goto out_resource;
2874 *p++ = cpu_to_be32(stat.blksize);
2875 }
2876#endif /* CONFIG_NFSD_PNFS */
8c18f205 2877 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
b26b78cb
TM		 2878 u32 supp[3];
2879
2880 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2881 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
2882 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
2883 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
2884
2885 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
75976de6
KM		 2886 if (status)
2887 goto out;
8c18f205 2888 }
7e705706 2889
a8585763
BF		 2890 if (bmval2 & FATTR4_WORD2_CHANGE_ATTR_TYPE) {
2891 p = xdr_reserve_space(xdr, 4);
2892 if (!p)
2893 goto out_resource;
2894 if (IS_I_VERSION(d_inode(dentry)))
2895 *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR);
2896 else
2897 *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_TIME_METADATA);
2898 }
2899
0ab88ca4 2900#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
7d580722
KM		 2901 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2902 status = nfsd4_encode_security_label(xdr, rqstp, context,
2903 contextlen);
2904 if (status)
2905 goto out;
2906 }
0ab88ca4 2907#endif
7d580722 2908
082d4bd7
BF		 2909 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2910 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2911 status = nfs_ok;
2912
2913out:
ba4e55bb 2914#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2915 if (context)
2916 security_release_secctx(context, contextlen);
ba4e55bb 2917#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2918 kfree(acl);
18df11d0 2919 if (tempfh) {
d50e6136 2920 fh_put(tempfh);
18df11d0
YZ		 2921 kfree(tempfh);
2922 }
1fcea5b2
BF		 2923 if (status)
2924 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2925 return status;
2926out_nfserr:
b8dd7b9a 2927 status = nfserrno(err);
1da177e4
LT		 2928 goto out;
2929out_resource:
1da177e4
LT		 2930 status = nfserr_resource;
2931 goto out;
1da177e4
LT		 2932}
2933
2825a7f9
BF		 2934static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2935 struct xdr_buf *buf, __be32 *p, int bytes)
2936{
2937 xdr->scratch.iov_len = 0;
2938 memset(buf, 0, sizeof(struct xdr_buf));
2939 buf->head[0].iov_base = p;
2940 buf->head[0].iov_len = 0;
2941 buf->len = 0;
2942 xdr->buf = buf;
2943 xdr->iov = buf->head;
2944 xdr->p = p;
2945 xdr->end = (void *)p + bytes;
2946 buf->buflen = bytes;
2947}
2948
d5184658
BF		 2949__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2950 struct svc_fh *fhp, struct svc_export *exp,
2951 struct dentry *dentry, u32 *bmval,
2952 struct svc_rqst *rqstp, int ignore_crossmnt)
2953{
2825a7f9 2954 struct xdr_buf dummy;
d5184658
BF		 2955 struct xdr_stream xdr;
2956 __be32 ret;
2957
2825a7f9 2958 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2959 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2960 ignore_crossmnt);
2961 *p = xdr.p;
2962 return ret;
2963}
2964
c0ce6ec8
BF		 2965static inline int attributes_need_mount(u32 *bmval)
2966{
2967 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2968 return 1;
2969 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2970 return 1;
2971 return 0;
2972}
2973
b37ad28b 2974static __be32
561f0ed4
BF		 2975nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2976 const char *name, int namlen)
1da177e4
LT		 2977{
2978 struct svc_export *exp = cd->rd_fhp->fh_export;
2979 struct dentry *dentry;
b37ad28b 2980 __be32 nfserr;
406a7ea9 2981 int ignore_crossmnt = 0;
1da177e4 2982
bbddca8e 2983 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
1da177e4
LT		 2984 if (IS_ERR(dentry))
2985 return nfserrno(PTR_ERR(dentry));
2b0143b5 2986 if (d_really_is_negative(dentry)) {
b2c0cea6 2987 /*
bbddca8e
N		 2988 * we're not holding the i_mutex here, so there's
2989 * a window where this directory entry could have gone
2990 * away.
b2c0cea6
BF		 2991 */
2992 dput(dentry);
2993 return nfserr_noent;
2994 }
1da177e4
LT		 2995
2996 exp_get(exp);
406a7ea9
FF		 2997 /*
2998 * In the case of a mountpoint, the client may be asking for
2999 * attributes that are only properties of the underlying filesystem
3000 * as opposed to the cross-mounted file system. In such a case,
3001 * we will not follow the cross mount and will fill the attribtutes
3002 * directly from the mountpoint dentry.
3003 */
3227fa41 3004 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 3005 int err;
3006
3227fa41
BF		 3007 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3008 && !attributes_need_mount(cd->rd_bmval)) {
3009 ignore_crossmnt = 1;
3010 goto out_encode;
3011 }
dcb488a3
AA		 3012 /*
3013 * Why the heck aren't we just using nfsd_lookup??
3014 * Different "."/".." handling? Something else?
3015 * At least, add a comment here to explain....
3016 */
021d3a72
BF		 3017 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3018 if (err) {
3019 nfserr = nfserrno(err);
1da177e4
LT		 3020 goto out_put;
3021 }
dcb488a3
AA		 3022 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3023 if (nfserr)
3024 goto out_put;
1da177e4
LT		 3025
3026 }
3227fa41 3027out_encode:
561f0ed4 3028 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 3029 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 3030out_put:
3031 dput(dentry);
3032 exp_put(exp);
3033 return nfserr;
3034}
3035
2ebbc012 3036static __be32 *
561f0ed4 3037nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 3038{
561f0ed4
BF		 3039 __be32 *p;
3040
c3a45617 3041 p = xdr_reserve_space(xdr, 20);
561f0ed4 3042 if (!p)
1da177e4
LT		 3043 return NULL;
3044 *p++ = htonl(2);
3045 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
3046 *p++ = htonl(0); /* bmval1 */
3047
87915c64 3048 *p++ = htonl(4); /* attribute length */
1da177e4 3049 *p++ = nfserr; /* no htonl */
1da177e4
LT		 3050 return p;
3051}
3052
3053static int
a0ad13ef
N		 3054nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3055 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 3056{
a0ad13ef 3057 struct readdir_cd *ccd = ccdv;
1da177e4 3058 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 3059 struct xdr_stream *xdr = cd->xdr;
3060 int start_offset = xdr->buf->len;
3061 int cookie_offset;
aee37764 3062 u32 name_and_cookie;
561f0ed4 3063 int entry_bytes;
b37ad28b 3064 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 3065 __be64 wire_offset;
3066 __be32 *p;
1da177e4
LT		 3067
3068 /* In nfsv4, "." and ".." never make it onto the wire.. */
3069 if (name && isdotent(name, namlen)) {
3070 cd->common.err = nfs_ok;
3071 return 0;
3072 }
3073
561f0ed4
BF		 3074 if (cd->cookie_offset) {
3075 wire_offset = cpu_to_be64(offset);
3076 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3077 &wire_offset, 8);
3078 }
1da177e4 3079
561f0ed4
BF		 3080 p = xdr_reserve_space(xdr, 4);
3081 if (!p)
1da177e4 3082 goto fail;
1da177e4 3083 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 3084 cookie_offset = xdr->buf->len;
3085 p = xdr_reserve_space(xdr, 3*4 + namlen);
3086 if (!p)
3087 goto fail;
1da177e4
LT		 3088 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
3089 p = xdr_encode_array(p, name, namlen); /* name length & name */
3090
561f0ed4 3091 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 3092 switch (nfserr) {
3093 case nfs_ok:
1da177e4
LT		 3094 break;
3095 case nfserr_resource:
3096 nfserr = nfserr_toosmall;
3097 goto fail;
b2c0cea6 3098 case nfserr_noent:
f41c5ad2 3099 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 3100 goto skip_entry;
1da177e4
LT		 3101 default:
3102 /*
3103 * If the client requested the RDATTR_ERROR attribute,
3104 * we stuff the error code into this attribute
3105 * and continue. If this attribute was not requested,
3106 * then in accordance with the spec, we fail the
3107 * entire READDIR operation(!)
3108 */
3109 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3110 goto fail;
561f0ed4 3111 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 3112 if (p == NULL) {
3113 nfserr = nfserr_toosmall;
1da177e4 3114 goto fail;
34081efc 3115 }
1da177e4 3116 }
561f0ed4
BF		 3117 nfserr = nfserr_toosmall;
3118 entry_bytes = xdr->buf->len - start_offset;
3119 if (entry_bytes > cd->rd_maxcount)
3120 goto fail;
3121 cd->rd_maxcount -= entry_bytes;
aee37764
BF		 3122 /*
3123 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3124 * let's always let through the first entry, at least:
3125 */
0ec016e3
BF		 3126 if (!cd->rd_dircount)
3127 goto fail;
3128 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
aee37764
BF		 3129 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3130 goto fail;
3131 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
0ec016e3 3132
561f0ed4 3133 cd->cookie_offset = cookie_offset;
b2c0cea6 3134skip_entry:
1da177e4
LT		 3135 cd->common.err = nfs_ok;
3136 return 0;
3137fail:
561f0ed4 3138 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 3139 cd->common.err = nfserr;
3140 return -EINVAL;
3141}
3142
d0a381dd
BF		 3143static __be32
3144nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 3145{
bc749ca4 3146 __be32 *p;
e2f282b9 3147
d0a381dd
BF		 3148 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3149 if (!p)
3150 return nfserr_resource;
c373b0a4 3151 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 3152 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3153 sizeof(stateid_opaque_t));
d0a381dd 3154 return 0;
e2f282b9
BH		 3155}
3156
695e12f8 3157static __be32
b37ad28b 3158nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 3159{
d0a381dd 3160 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3161 __be32 *p;
1da177e4 3162
bac966d6
BF		 3163 p = xdr_reserve_space(xdr, 8);
3164 if (!p)
3165 return nfserr_resource;
3166 *p++ = cpu_to_be32(access->ac_supported);
3167 *p++ = cpu_to_be32(access->ac_resp_access);
3168 return 0;
1da177e4
LT		 3169}
3170
1d1bc8f2
BF		 3171static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3172{
d0a381dd 3173 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 3174 __be32 *p;
3175
bac966d6
BF		 3176 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3177 if (!p)
3178 return nfserr_resource;
3179 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3180 NFS4_MAX_SESSIONID_LEN);
3181 *p++ = cpu_to_be32(bcts->dir);
3182 /* Upshifting from TCP to RDMA is not supported */
3183 *p++ = cpu_to_be32(0);
3184 return 0;
1d1bc8f2
BF		 3185}
3186
695e12f8 3187static __be32
b37ad28b 3188nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 3189{
d0a381dd
BF		 3190 struct xdr_stream *xdr = &resp->xdr;
3191
bac966d6 3192 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
1da177e4
LT		 3193}
3194
3195
695e12f8 3196static __be32
b37ad28b 3197nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 3198{
d0a381dd 3199 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3200 __be32 *p;
1da177e4 3201
bac966d6
BF		 3202 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3203 if (!p)
3204 return nfserr_resource;
3205 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
0c0c267b 3206 NFS4_VERIFIER_SIZE);
bac966d6 3207 return 0;
1da177e4
LT		 3208}
3209
695e12f8 3210static __be32
b37ad28b 3211nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 3212{
d0a381dd 3213 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3214 __be32 *p;
1da177e4 3215
bac966d6
BF		 3216 p = xdr_reserve_space(xdr, 20);
3217 if (!p)
3218 return nfserr_resource;
3219 encode_cinfo(p, &create->cr_cinfo);
3220 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3221 create->cr_bmval[1], create->cr_bmval[2]);
3222 return 0;
1da177e4
LT		 3223}
3224
b37ad28b
AV		 3225static __be32
3226nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 3227{
3228 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 3229 struct xdr_stream *xdr = &resp->xdr;
1da177e4 3230
bac966d6
BF		 3231 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3232 getattr->ga_bmval, resp->rqstp, 0);
1da177e4
LT		 3233}
3234
695e12f8
BH		 3235static __be32
3236nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 3237{
d0a381dd 3238 struct xdr_stream *xdr = &resp->xdr;
695e12f8 3239 struct svc_fh *fhp = *fhpp;
1da177e4 3240 unsigned int len;
bc749ca4 3241 __be32 *p;
1da177e4 3242
bac966d6
BF		 3243 len = fhp->fh_handle.fh_size;
3244 p = xdr_reserve_space(xdr, len + 4);
3245 if (!p)
3246 return nfserr_resource;
3247 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3248 return 0;
1da177e4
LT		 3249}
3250
3251/*
3252* Including all fields other than the name, a LOCK4denied structure requires
3253* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3254*/
d0a381dd
BF		 3255static __be32
3256nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 3257{
7c13f344 3258 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 3259 __be32 *p;
1da177e4 3260
8c7424cf 3261again:
d0a381dd 3262 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 3263 if (!p) {
3264 /*
3265 * Don't fail to return the result just because we can't
3266 * return the conflicting open:
3267 */
3268 if (conf->len) {
f98bac5a 3269 kfree(conf->data);
8c7424cf
BF		 3270 conf->len = 0;
3271 conf->data = NULL;
3272 goto again;
3273 }
d0a381dd 3274 return nfserr_resource;
8c7424cf 3275 }
b64c7f3b
BF		 3276 p = xdr_encode_hyper(p, ld->ld_start);
3277 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 3278 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 3279 if (conf->len) {
0c0c267b
BF		 3280 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3281 p = xdr_encode_opaque(p, conf->data, conf->len);
f98bac5a 3282 kfree(conf->data);
1da177e4 3283 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 3284 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 3285 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 3286 }
d0a381dd 3287 return nfserr_denied;
1da177e4
LT		 3288}
3289
695e12f8 3290static __be32
b37ad28b 3291nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 3292{
d0a381dd
BF		 3293 struct xdr_stream *xdr = &resp->xdr;
3294
e2f282b9 3295 if (!nfserr)
d0a381dd 3296 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 3297 else if (nfserr == nfserr_denied)
d0a381dd 3298 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
f98bac5a 3299
695e12f8 3300 return nfserr;
1da177e4
LT		 3301}
3302
695e12f8 3303static __be32
b37ad28b 3304nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 3305{
d0a381dd
BF		 3306 struct xdr_stream *xdr = &resp->xdr;
3307
1da177e4 3308 if (nfserr == nfserr_denied)
d0a381dd 3309 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 3310 return nfserr;
1da177e4
LT		 3311}
3312
695e12f8 3313static __be32
b37ad28b 3314nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 3315{
d0a381dd
BF		 3316 struct xdr_stream *xdr = &resp->xdr;
3317
bac966d6 3318 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
1da177e4
LT		 3319}
3320
3321
695e12f8 3322static __be32
b37ad28b 3323nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 3324{
d0a381dd 3325 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3326 __be32 *p;
1da177e4 3327
bac966d6
BF		 3328 p = xdr_reserve_space(xdr, 20);
3329 if (!p)
3330 return nfserr_resource;
3331 p = encode_cinfo(p, &link->li_cinfo);
3332 return 0;
1da177e4
LT		 3333}
3334
3335
695e12f8 3336static __be32
b37ad28b 3337nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 3338{
d0a381dd 3339 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3340 __be32 *p;
1da177e4 3341
d0a381dd
BF		 3342 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3343 if (nfserr)
bac966d6 3344 return nfserr;
75976de6 3345 p = xdr_reserve_space(xdr, 24);
d0a381dd
BF		 3346 if (!p)
3347 return nfserr_resource;
d05d5744 3348 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4 3349 *p++ = cpu_to_be32(open->op_rflags);
1da177e4 3350
75976de6
KM		 3351 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3352 open->op_bmval[2]);
3353 if (nfserr)
bac966d6 3354 return nfserr;
75976de6
KM		 3355
3356 p = xdr_reserve_space(xdr, 4);
3357 if (!p)
3358 return nfserr_resource;
3359
3360 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 3361 switch (open->op_delegate_type) {
3362 case NFS4_OPEN_DELEGATE_NONE:
3363 break;
3364 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 3365 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3366 if (nfserr)
3367 return nfserr;
3368 p = xdr_reserve_space(xdr, 20);
3369 if (!p)
3370 return nfserr_resource;
c373b0a4 3371 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 3372
3373 /*
3374 * TODO: ACE's in delegations
3375 */
c373b0a4
BF		 3376 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3377 *p++ = cpu_to_be32(0);
3378 *p++ = cpu_to_be32(0);
3379 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 3380 break;
3381 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 3382 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3383 if (nfserr)
3384 return nfserr;
3385 p = xdr_reserve_space(xdr, 32);
3386 if (!p)
3387 return nfserr_resource;
c373b0a4 3388 *p++ = cpu_to_be32(0);
1da177e4
LT		 3389
3390 /*
3391 * TODO: space_limit's in delegations
3392 */
c373b0a4
BF		 3393 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3394 *p++ = cpu_to_be32(~(u32)0);
3395 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3396
3397 /*
3398 * TODO: ACE's in delegations
3399 */
c373b0a4
BF		 3400 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3401 *p++ = cpu_to_be32(0);
3402 *p++ = cpu_to_be32(0);
3403 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3404 break;
d24433cd
BH		 3405 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3406 switch (open->op_why_no_deleg) {
3407 case WND4_CONTENTION:
3408 case WND4_RESOURCE:
d0a381dd
BF		 3409 p = xdr_reserve_space(xdr, 8);
3410 if (!p)
3411 return nfserr_resource;
c373b0a4
BF		 3412 *p++ = cpu_to_be32(open->op_why_no_deleg);
3413 /* deleg signaling not supported yet: */
3414 *p++ = cpu_to_be32(0);
d24433cd
BH		 3415 break;
3416 default:
d0a381dd
BF		 3417 p = xdr_reserve_space(xdr, 4);
3418 if (!p)
3419 return nfserr_resource;
c373b0a4 3420 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3421 }
d24433cd 3422 break;
1da177e4
LT		 3423 default:
3424 BUG();
3425 }
3426 /* XXX save filehandle here */
bac966d6 3427 return 0;
1da177e4
LT		 3428}
3429
695e12f8 3430static __be32
b37ad28b 3431nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3432{
d0a381dd
BF		 3433 struct xdr_stream *xdr = &resp->xdr;
3434
bac966d6 3435 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4
LT		 3436}
3437
695e12f8 3438static __be32
b37ad28b 3439nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3440{
d0a381dd
BF		 3441 struct xdr_stream *xdr = &resp->xdr;
3442
bac966d6 3443 return nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4
LT		 3444}
3445
dc97618d
BF		 3446static __be32 nfsd4_encode_splice_read(
3447 struct nfsd4_compoundres *resp,
3448 struct nfsd4_read *read,
3449 struct file *file, unsigned long maxcount)
1da177e4 3450{
ddd1ea56 3451 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3452 struct xdr_buf *buf = xdr->buf;
dc97618d 3453 u32 eof;
ac503e4a 3454 long len;
30596768 3455 int space_left;
dc97618d 3456 __be32 nfserr;
fec25fa4 3457 __be32 *p = xdr->p - 2;
1da177e4 3458
d5d5c304
KM		 3459 /* Make sure there will be room for padding if needed */
3460 if (xdr->end - xdr->p < 1)
d0a381dd 3461 return nfserr_resource;
dc97618d 3462
ac503e4a 3463 len = maxcount;
87c5942e
CL		 3464 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
3465 file, read->rd_offset, &maxcount);
3466 read->rd_length = maxcount;
dc97618d
BF		 3467 if (nfserr) {
3468 /*
3469 * nfsd_splice_actor may have already messed with the
3470 * page length; reset it so as not to confuse
3471 * xdr_truncate_encode:
3472 */
34a78b48 3473 buf->page_len = 0;
dc97618d 3474 return nfserr;
b0e35fda 3475 }
1da177e4 3476
ac503e4a
BC		 3477 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3478 d_inode(read->rd_fhp->fh_dentry)->i_size);
4e21ac4b 3479
fec25fa4
BF		 3480 *(p++) = htonl(eof);
3481 *(p++) = htonl(maxcount);
dc97618d 3482
34a78b48
BF		 3483 buf->page_len = maxcount;
3484 buf->len += maxcount;
15b23ef5
BF		 3485 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3486 / PAGE_SIZE;
dc97618d
BF		 3487
3488 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3489 buf->tail[0].iov_base = xdr->p;
3490 buf->tail[0].iov_len = 0;
fec25fa4 3491 xdr->iov = buf->tail;
dc97618d 3492 if (maxcount&3) {
fec25fa4
BF		 3493 int pad = 4 - (maxcount&3);
3494
3495 *(xdr->p++) = 0;
3496
34a78b48 3497 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3498 buf->tail[0].iov_len = pad;
3499 buf->len += pad;
b0e35fda 3500 }
2825a7f9 3501
dc97618d 3502 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3503 buf->buflen - buf->len);
3504 buf->buflen = buf->len + space_left;
dc97618d
BF		 3505 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3506
3507 return 0;
3508}
3509
3510static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3511 struct nfsd4_read *read,
3512 struct file *file, unsigned long maxcount)
3513{
3514 struct xdr_stream *xdr = &resp->xdr;
3515 u32 eof;
3516 int v;
dc97618d 3517 int starting_len = xdr->buf->len - 8;
dc97618d 3518 long len;
b0420980 3519 int thislen;
dc97618d
BF		 3520 __be32 nfserr;
3521 __be32 tmp;
3522 __be32 *p;
b0420980
BF		 3523 u32 zzz = 0;
3524 int pad;
1da177e4
LT		 3525
3526 len = maxcount;
3527 v = 0;
6ff9897d 3528
1055414f 3529 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
b0420980
BF		 3530 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3531 WARN_ON_ONCE(!p);
3532 resp->rqstp->rq_vec[v].iov_base = p;
3533 resp->rqstp->rq_vec[v].iov_len = thislen;
3534 v++;
3535 len -= thislen;
3536
3537 while (len) {
6ff9897d 3538 thislen = min_t(long, len, PAGE_SIZE);
b0420980
BF		 3539 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3540 WARN_ON_ONCE(!p);
3541 resp->rqstp->rq_vec[v].iov_base = p;
6ff9897d 3542 resp->rqstp->rq_vec[v].iov_len = thislen;
1da177e4 3543 v++;
6ff9897d 3544 len -= thislen;
1da177e4
LT		 3545 }
3546 read->rd_vlen = v;
3547
ac503e4a 3548 len = maxcount;
87c5942e
CL		 3549 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
3550 resp->rqstp->rq_vec, read->rd_vlen, &maxcount);
3551 read->rd_length = maxcount;
dc97618d 3552 if (nfserr)
1da177e4 3553 return nfserr;
b0420980 3554 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
dc97618d 3555
ac503e4a
BC		 3556 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3557 d_inode(read->rd_fhp->fh_dentry)->i_size);
1da177e4 3558
dc97618d
BF		 3559 tmp = htonl(eof);
3560 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3561 tmp = htonl(maxcount);
3562 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3563
b0420980
BF		 3564 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3565 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3566 &zzz, pad);
1da177e4 3567 return 0;
dc97618d
BF		 3568
3569}
3570
3571static __be32
3572nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3573 struct nfsd4_read *read)
3574{
3575 unsigned long maxcount;
3576 struct xdr_stream *xdr = &resp->xdr;
3577 struct file *file = read->rd_filp;
3578 int starting_len = xdr->buf->len;
e749a462 3579 struct raparms *ra = NULL;
dc97618d 3580 __be32 *p;
dc97618d 3581
dc97618d
BF		 3582 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3583 if (!p) {
779fb0f3 3584 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
bac966d6 3585 return nfserr_resource;
dc97618d 3586 }
68e8bb03
CH		 3587 if (resp->xdr.buf->page_len &&
3588 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
b0420980 3589 WARN_ON_ONCE(1);
bac966d6 3590 return nfserr_resource;
dc97618d 3591 }
dc97618d
BF		 3592 xdr_commit_encode(xdr);
3593
3594 maxcount = svc_max_payload(resp->rqstp);
68e8bb03
CH		 3595 maxcount = min_t(unsigned long, maxcount,
3596 (xdr->buf->buflen - xdr->buf->len));
3c7aa15d 3597 maxcount = min_t(unsigned long, maxcount, read->rd_length);
dc97618d 3598
af90f707 3599 if (read->rd_tmp_file)
e749a462 3600 ra = nfsd_init_raparms(file);
dc97618d 3601
68e8bb03
CH		 3602 if (file->f_op->splice_read &&
3603 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
96bcad50 3604 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
dc97618d 3605 else
96bcad50 3606 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
dc97618d 3607
e749a462
CH		 3608 if (ra)
3609 nfsd_put_raparams(file, ra);
dc97618d 3610
96bcad50 3611 if (nfserr)
dc97618d 3612 xdr_truncate_encode(xdr, starting_len);
96bcad50 3613
96bcad50 3614 return nfserr;
1da177e4
LT		 3615}
3616
b37ad28b
AV		 3617static __be32
3618nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3619{
3620 int maxcount;
476a7b1f
BF		 3621 __be32 wire_count;
3622 int zero = 0;
ddd1ea56 3623 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3624 int length_offset = xdr->buf->len;
bc749ca4 3625 __be32 *p;
1da177e4 3626
2825a7f9
BF		 3627 p = xdr_reserve_space(xdr, 4);
3628 if (!p)
3629 return nfserr_resource;
1da177e4 3630 maxcount = PAGE_SIZE;
d0a381dd 3631
476a7b1f
BF		 3632 p = xdr_reserve_space(xdr, maxcount);
3633 if (!p)
4e21ac4b 3634 return nfserr_resource;
1da177e4 3635 /*
fd4a0edf
MS		 3636 * XXX: By default, vfs_readlink() will truncate symlinks if they
3637 * would overflow the buffer. Is this kosher in NFSv4? If not, one
3638 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
3639 * that truncation occurred, and return NFS4ERR_RESOURCE.
1da177e4 3640 */
476a7b1f
BF		 3641 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3642 (char *)p, &maxcount);
1da177e4 3643 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3644 nfserr = nfserr_inval;
3645 if (nfserr) {
1fcea5b2 3646 xdr_truncate_encode(xdr, length_offset);
1da177e4 3647 return nfserr;
d3f627c8 3648 }
1da177e4 3649
476a7b1f
BF		 3650 wire_count = htonl(maxcount);
3651 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
69bbd9c7 3652 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
476a7b1f
BF		 3653 if (maxcount & 3)
3654 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3655 &zero, 4 - (maxcount&3));
1da177e4
LT		 3656 return 0;
3657}
3658
b37ad28b
AV		 3659static __be32
3660nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3661{
3662 int maxcount;
561f0ed4 3663 int bytes_left;
1da177e4 3664 loff_t offset;
561f0ed4 3665 __be64 wire_offset;
ddd1ea56 3666 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3667 int starting_len = xdr->buf->len;
bc749ca4 3668 __be32 *p;
1da177e4 3669
d0a381dd
BF		 3670 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3671 if (!p)
3672 return nfserr_resource;
1da177e4
LT		 3673
3674 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 3675 *p++ = cpu_to_be32(0);
3676 *p++ = cpu_to_be32(0);
4aea24b2
BF		 3677 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3678 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3679
3680 /*
561f0ed4
BF		 3681 * Number of bytes left for directory entries allowing for the
3682 * final 8 bytes of the readdir and a following failed op:
3683 */
3684 bytes_left = xdr->buf->buflen - xdr->buf->len
3685 - COMPOUND_ERR_SLACK_SPACE - 8;
3686 if (bytes_left < 0) {
3687 nfserr = nfserr_resource;
3688 goto err_no_verf;
3689 }
9c2ece6e
SM		 3690 maxcount = svc_max_payload(resp->rqstp);
3691 maxcount = min_t(u32, readdir->rd_maxcount, maxcount);
561f0ed4
BF		 3692 /*
3693 * Note the rfc defines rd_maxcount as the size of the
3694 * READDIR4resok structure, which includes the verifier above
3695 * and the 8 bytes encoded at the end of this function:
1da177e4 3696 */
561f0ed4
BF		 3697 if (maxcount < 16) {
3698 nfserr = nfserr_toosmall;
1da177e4
LT		 3699 goto err_no_verf;
3700 }
561f0ed4 3701 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3702
aee37764
BF		 3703 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3704 if (!readdir->rd_dircount)
9c2ece6e 3705 readdir->rd_dircount = svc_max_payload(resp->rqstp);
aee37764 3706
561f0ed4
BF		 3707 readdir->xdr = xdr;
3708 readdir->rd_maxcount = maxcount;
1da177e4 3709 readdir->common.err = 0;
561f0ed4 3710 readdir->cookie_offset = 0;
1da177e4
LT		 3711
3712 offset = readdir->rd_cookie;
3713 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3714 &offset,
3715 &readdir->common, nfsd4_encode_dirent);
3716 if (nfserr == nfs_ok &&
3717 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3718 xdr->buf->len == starting_len + 8) {
3719 /* nothing encoded; which limit did we hit?: */
3720 if (maxcount - 16 < bytes_left)
3721 /* It was the fault of rd_maxcount: */
3722 nfserr = nfserr_toosmall;
3723 else
3724 /* We ran out of buffer space: */
3725 nfserr = nfserr_resource;
3726 }
1da177e4
LT		 3727 if (nfserr)
3728 goto err_no_verf;
3729
561f0ed4
BF		 3730 if (readdir->cookie_offset) {
3731 wire_offset = cpu_to_be64(offset);
3732 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3733 &wire_offset, 8);
3734 }
1da177e4 3735
561f0ed4
BF		 3736 p = xdr_reserve_space(xdr, 8);
3737 if (!p) {
3738 WARN_ON_ONCE(1);
3739 goto err_no_verf;
3740 }
1da177e4
LT		 3741 *p++ = 0; /* no more entries */
3742 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3743
3744 return 0;
3745err_no_verf:
1fcea5b2 3746 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3747 return nfserr;
3748}
3749
695e12f8 3750static __be32
b37ad28b 3751nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3752{
d0a381dd 3753 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3754 __be32 *p;
1da177e4 3755
bac966d6
BF		 3756 p = xdr_reserve_space(xdr, 20);
3757 if (!p)
3758 return nfserr_resource;
3759 p = encode_cinfo(p, &remove->rm_cinfo);
3760 return 0;
1da177e4
LT		 3761}
3762
695e12f8 3763static __be32
b37ad28b 3764nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3765{
d0a381dd 3766 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3767 __be32 *p;
1da177e4 3768
bac966d6
BF		 3769 p = xdr_reserve_space(xdr, 40);
3770 if (!p)
3771 return nfserr_resource;
3772 p = encode_cinfo(p, &rename->rn_sinfo);
3773 p = encode_cinfo(p, &rename->rn_tinfo);
3774 return 0;
1da177e4
LT		 3775}
3776
695e12f8 3777static __be32
bac966d6 3778nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
dcb488a3 3779{
676e4ebd 3780 u32 i, nflavs, supported;
4796f457
BF		 3781 struct exp_flavor_info *flavs;
3782 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3783 __be32 *p, *flavorsp;
3784 static bool report = true;
dcb488a3 3785
4796f457
BF		 3786 if (exp->ex_nflavors) {
3787 flavs = exp->ex_flavors;
3788 nflavs = exp->ex_nflavors;
3789 } else { /* Handling of some defaults in absence of real secinfo: */
3790 flavs = def_flavs;
3791 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3792 nflavs = 2;
3793 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3794 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3795 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3796 nflavs = 1;
3797 flavs[0].pseudoflavor
3798 = svcauth_gss_flavor(exp->ex_client);
3799 } else {
3800 nflavs = 1;
3801 flavs[0].pseudoflavor
3802 = exp->ex_client->flavour->flavour;
3803 }
3804 }
3805
676e4ebd 3806 supported = 0;
d0a381dd
BF		 3807 p = xdr_reserve_space(xdr, 4);
3808 if (!p)
bac966d6 3809 return nfserr_resource;
676e4ebd 3810 flavorsp = p++; /* to be backfilled later */
676e4ebd 3811
4796f457 3812 for (i = 0; i < nflavs; i++) {
676e4ebd 3813 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3814 struct rpcsec_gss_info info;
dcb488a3 3815
676e4ebd
CL		 3816 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3817 supported++;
d0a381dd
BF		 3818 p = xdr_reserve_space(xdr, 4 + 4 +
3819 XDR_LEN(info.oid.len) + 4 + 4);
3820 if (!p)
bac966d6 3821 return nfserr_resource;
c373b0a4 3822 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 3823 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 3824 *p++ = cpu_to_be32(info.qop);
3825 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 3826 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3827 supported++;
d0a381dd
BF		 3828 p = xdr_reserve_space(xdr, 4);
3829 if (!p)
bac966d6 3830 return nfserr_resource;
c373b0a4 3831 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 3832 } else {
3833 if (report)
3834 pr_warn("NFS: SECINFO: security flavor %u "
3835 "is not supported\n", pf);
dcb488a3
AA		 3836 }
3837 }
a77c806f 3838
676e4ebd
CL		 3839 if (nflavs != supported)
3840 report = false;
3841 *flavorsp = htonl(supported);
bac966d6 3842 return 0;
dcb488a3
AA		 3843}
3844
22b6dee8
MJ		 3845static __be32
3846nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3847 struct nfsd4_secinfo *secinfo)
3848{
d0a381dd
BF		 3849 struct xdr_stream *xdr = &resp->xdr;
3850
bac966d6 3851 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
22b6dee8
MJ		 3852}
3853
3854static __be32
3855nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3856 struct nfsd4_secinfo_no_name *secinfo)
3857{
d0a381dd
BF		 3858 struct xdr_stream *xdr = &resp->xdr;
3859
bac966d6 3860 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
22b6dee8
MJ		 3861}
3862
1da177e4
LT		 3863/*
3864 * The SETATTR encode routine is special -- it always encodes a bitmap,
3865 * regardless of the error status.
3866 */
695e12f8 3867static __be32
b37ad28b 3868nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3869{
d0a381dd 3870 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3871 __be32 *p;
1da177e4 3872
d0a381dd
BF		 3873 p = xdr_reserve_space(xdr, 16);
3874 if (!p)
3875 return nfserr_resource;
1da177e4 3876 if (nfserr) {
c373b0a4
BF		 3877 *p++ = cpu_to_be32(3);
3878 *p++ = cpu_to_be32(0);
3879 *p++ = cpu_to_be32(0);
3880 *p++ = cpu_to_be32(0);
1da177e4
LT		 3881 }
3882 else {
c373b0a4
BF		 3883 *p++ = cpu_to_be32(3);
3884 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3885 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3886 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 3887 }
695e12f8 3888 return nfserr;
1da177e4
LT		 3889}
3890
695e12f8 3891static __be32
b37ad28b 3892nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3893{
d0a381dd 3894 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3895 __be32 *p;
1da177e4
LT		 3896
3897 if (!nfserr) {
d0a381dd
BF		 3898 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3899 if (!p)
3900 return nfserr_resource;
0c0c267b
BF		 3901 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3902 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3903 NFS4_VERIFIER_SIZE);
1da177e4
LT		 3904 }
3905 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3906 p = xdr_reserve_space(xdr, 8);
3907 if (!p)
3908 return nfserr_resource;
c373b0a4
BF		 3909 *p++ = cpu_to_be32(0);
3910 *p++ = cpu_to_be32(0);
1da177e4 3911 }
695e12f8 3912 return nfserr;
1da177e4
LT		 3913}
3914
695e12f8 3915static __be32
b37ad28b 3916nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3917{
d0a381dd 3918 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3919 __be32 *p;
1da177e4 3920
bac966d6
BF		 3921 p = xdr_reserve_space(xdr, 16);
3922 if (!p)
3923 return nfserr_resource;
3924 *p++ = cpu_to_be32(write->wr_bytes_written);
3925 *p++ = cpu_to_be32(write->wr_how_written);
3926 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3927 NFS4_VERIFIER_SIZE);
3928 return 0;
1da177e4
LT		 3929}
3930
2db134eb 3931static __be32
57b7b43b 3932nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3933 struct nfsd4_exchange_id *exid)
3934{
d0a381dd 3935 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3936 __be32 *p;
0733d213
AA		 3937 char *major_id;
3938 char *server_scope;
3939 int major_id_sz;
3940 int server_scope_sz;
3941 uint64_t minor_id = 0;
3942
0733d213
AA		 3943 major_id = utsname()->nodename;
3944 major_id_sz = strlen(major_id);
3945 server_scope = utsname()->nodename;
3946 server_scope_sz = strlen(server_scope);
3947
d0a381dd 3948 p = xdr_reserve_space(xdr,
0733d213
AA		 3949 8 /* eir_clientid */ +
3950 4 /* eir_sequenceid */ +
3951 4 /* eir_flags */ +
a8bb84bc 3952 4 /* spr_how */);
d0a381dd
BF		 3953 if (!p)
3954 return nfserr_resource;
0733d213 3955
0c0c267b 3956 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 3957 *p++ = cpu_to_be32(exid->seqid);
3958 *p++ = cpu_to_be32(exid->flags);
0733d213 3959
c373b0a4 3960 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 3961
57266a6e
BF		 3962 switch (exid->spa_how) {
3963 case SP4_NONE:
3964 break;
3965 case SP4_MACH_CRED:
3966 /* spo_must_enforce bitmap: */
bac966d6 3967 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 3968 exid->spo_must_enforce[0],
3969 exid->spo_must_enforce[1],
3970 exid->spo_must_enforce[2]);
bac966d6
BF		 3971 if (nfserr)
3972 return nfserr;
ed941643 3973 /* spo_must_allow bitmap: */
bac966d6 3974 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 3975 exid->spo_must_allow[0],
3976 exid->spo_must_allow[1],
3977 exid->spo_must_allow[2]);
bac966d6
BF		 3978 if (nfserr)
3979 return nfserr;
57266a6e
BF		 3980 break;
3981 default:
3982 WARN_ON_ONCE(1);
3983 }
0733d213 3984
d0a381dd 3985 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3986 8 /* so_minor_id */ +
3987 4 /* so_major_id.len */ +
3988 (XDR_QUADLEN(major_id_sz) * 4) +
3989 4 /* eir_server_scope.len */ +
3990 (XDR_QUADLEN(server_scope_sz) * 4) +
3991 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3992 if (!p)
3993 return nfserr_resource;
a8bb84bc 3994
0733d213 3995 /* The server_owner struct */
b64c7f3b 3996 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 3997 /* major id */
0c0c267b 3998 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 3999
4000 /* Server scope */
0c0c267b 4001 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 4002
4003 /* Implementation id */
c373b0a4 4004 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 4005 return 0;
2db134eb
AA		 4006}
4007
4008static __be32
57b7b43b 4009nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4010 struct nfsd4_create_session *sess)
4011{
d0a381dd 4012 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4013 __be32 *p;
ec6b5d7b 4014
d0a381dd
BF		 4015 p = xdr_reserve_space(xdr, 24);
4016 if (!p)
4017 return nfserr_resource;
0c0c267b
BF		 4018 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4019 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4020 *p++ = cpu_to_be32(sess->seqid);
4021 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 4022
d0a381dd
BF		 4023 p = xdr_reserve_space(xdr, 28);
4024 if (!p)
4025 return nfserr_resource;
c373b0a4
BF		 4026 *p++ = cpu_to_be32(0); /* headerpadsz */
4027 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4028 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4029 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4030 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4031 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4032 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4033
4034 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 4035 p = xdr_reserve_space(xdr, 4);
4036 if (!p)
4037 return nfserr_resource;
c373b0a4 4038 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 4039 }
4040
d0a381dd
BF		 4041 p = xdr_reserve_space(xdr, 28);
4042 if (!p)
4043 return nfserr_resource;
c373b0a4
BF		 4044 *p++ = cpu_to_be32(0); /* headerpadsz */
4045 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4046 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4047 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4048 *p++ = cpu_to_be32(sess->back_channel.maxops);
4049 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4050 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4051
4052 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 4053 p = xdr_reserve_space(xdr, 4);
4054 if (!p)
4055 return nfserr_resource;
c373b0a4 4056 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 4057 }
4058 return 0;
2db134eb
AA		 4059}
4060
c47d832b 4061static __be32
57b7b43b 4062nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4063 struct nfsd4_sequence *seq)
4064{
d0a381dd 4065 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4066 __be32 *p;
b85d4c01 4067
d0a381dd
BF		 4068 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4069 if (!p)
4070 return nfserr_resource;
0c0c267b
BF		 4071 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4072 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4073 *p++ = cpu_to_be32(seq->seqid);
4074 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 4075 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 4076 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4077 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4078 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 4079
f5236013 4080 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 4081 return 0;
2db134eb
AA		 4082}
4083
2355c596 4084static __be32
57b7b43b 4085nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 4086 struct nfsd4_test_stateid *test_stateid)
4087{
d0a381dd 4088 struct xdr_stream *xdr = &resp->xdr;
03cfb420 4089 struct nfsd4_test_stateid_id *stateid, *next;
17456804 4090 __be32 *p;
17456804 4091
d0a381dd
BF		 4092 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4093 if (!p)
4094 return nfserr_resource;
17456804 4095 *p++ = htonl(test_stateid->ts_num_ids);
17456804 4096
03cfb420 4097 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 4098 *p++ = stateid->ts_id_status;
17456804 4099 }
17456804 4100
bac966d6 4101 return 0;
17456804
BS		 4102}
4103
9cf514cc
CH		 4104#ifdef CONFIG_NFSD_PNFS
4105static __be32
4106nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4107 struct nfsd4_getdeviceinfo *gdev)
4108{
4109 struct xdr_stream *xdr = &resp->xdr;
f961e3f2 4110 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4111 u32 starting_len = xdr->buf->len, needed_len;
4112 __be32 *p;
4113
9cf514cc
CH		 4114 p = xdr_reserve_space(xdr, 4);
4115 if (!p)
bac966d6 4116 return nfserr_resource;
9cf514cc
CH		 4117
4118 *p++ = cpu_to_be32(gdev->gd_layout_type);
4119
4120 /* If maxcount is 0 then just update notifications */
4121 if (gdev->gd_maxcount != 0) {
f961e3f2 4122 ops = nfsd4_layout_ops[gdev->gd_layout_type];
9cf514cc
CH		 4123 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4124 if (nfserr) {
4125 /*
4126 * We don't bother to burden the layout drivers with
4127 * enforcing gd_maxcount, just tell the client to
4128 * come back with a bigger buffer if it's not enough.
4129 */
4130 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4131 goto toosmall;
bac966d6 4132 return nfserr;
9cf514cc
CH		 4133 }
4134 }
4135
9cf514cc
CH		 4136 if (gdev->gd_notify_types) {
4137 p = xdr_reserve_space(xdr, 4 + 4);
4138 if (!p)
bac966d6 4139 return nfserr_resource;
9cf514cc
CH		 4140 *p++ = cpu_to_be32(1); /* bitmap length */
4141 *p++ = cpu_to_be32(gdev->gd_notify_types);
4142 } else {
4143 p = xdr_reserve_space(xdr, 4);
4144 if (!p)
bac966d6 4145 return nfserr_resource;
9cf514cc
CH		 4146 *p++ = 0;
4147 }
4148
bac966d6 4149 return 0;
9cf514cc
CH		 4150toosmall:
4151 dprintk("%s: maxcount too small\n", __func__);
4152 needed_len = xdr->buf->len + 4 /* notifications */;
4153 xdr_truncate_encode(xdr, starting_len);
4154 p = xdr_reserve_space(xdr, 4);
bac966d6
BF		 4155 if (!p)
4156 return nfserr_resource;
4157 *p++ = cpu_to_be32(needed_len);
4158 return nfserr_toosmall;
9cf514cc
CH		 4159}
4160
4161static __be32
4162nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4163 struct nfsd4_layoutget *lgp)
4164{
4165 struct xdr_stream *xdr = &resp->xdr;
f961e3f2 4166 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4167 __be32 *p;
4168
9cf514cc
CH		 4169 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4170 if (!p)
bac966d6 4171 return nfserr_resource;
9cf514cc
CH		 4172
4173 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4174 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4175 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4176 sizeof(stateid_opaque_t));
4177
4178 *p++ = cpu_to_be32(1); /* we always return a single layout */
4179 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4180 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4181 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4182 *p++ = cpu_to_be32(lgp->lg_layout_type);
4183
f961e3f2 4184 ops = nfsd4_layout_ops[lgp->lg_layout_type];
bac966d6 4185 return ops->encode_layoutget(xdr, lgp);
9cf514cc
CH		 4186}
4187
4188static __be32
4189nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4190 struct nfsd4_layoutcommit *lcp)
4191{
4192 struct xdr_stream *xdr = &resp->xdr;
4193 __be32 *p;
4194
9cf514cc
CH		 4195 p = xdr_reserve_space(xdr, 4);
4196 if (!p)
4197 return nfserr_resource;
4198 *p++ = cpu_to_be32(lcp->lc_size_chg);
4199 if (lcp->lc_size_chg) {
4200 p = xdr_reserve_space(xdr, 8);
4201 if (!p)
4202 return nfserr_resource;
4203 p = xdr_encode_hyper(p, lcp->lc_newsize);
4204 }
4205
bac966d6 4206 return 0;
9cf514cc
CH		 4207}
4208
4209static __be32
4210nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4211 struct nfsd4_layoutreturn *lrp)
4212{
4213 struct xdr_stream *xdr = &resp->xdr;
4214 __be32 *p;
4215
9cf514cc
CH		 4216 p = xdr_reserve_space(xdr, 4);
4217 if (!p)
4218 return nfserr_resource;
4219 *p++ = cpu_to_be32(lrp->lrs_present);
4220 if (lrp->lrs_present)
376675da 4221 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
bac966d6 4222 return 0;
9cf514cc
CH		 4223}
4224#endif /* CONFIG_NFSD_PNFS */
4225
29ae7f9d 4226static __be32
e0639dc5
OK		 4227nfsd42_encode_write_res(struct nfsd4_compoundres *resp,
4228 struct nfsd42_write_res *write, bool sync)
29ae7f9d
AS		 4229{
4230 __be32 *p;
e0639dc5
OK		 4231 p = xdr_reserve_space(&resp->xdr, 4);
4232 if (!p)
4233 return nfserr_resource;
29ae7f9d 4234
e0639dc5
OK		 4235 if (sync)
4236 *p++ = cpu_to_be32(0);
4237 else {
4238 __be32 nfserr;
4239 *p++ = cpu_to_be32(1);
4240 nfserr = nfsd4_encode_stateid(&resp->xdr, &write->cb_stateid);
4241 if (nfserr)
4242 return nfserr;
4243 }
4244 p = xdr_reserve_space(&resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE);
29ae7f9d
AS		 4245 if (!p)
4246 return nfserr_resource;
4247
29ae7f9d
AS		 4248 p = xdr_encode_hyper(p, write->wr_bytes_written);
4249 *p++ = cpu_to_be32(write->wr_stable_how);
4250 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4251 NFS4_VERIFIER_SIZE);
4252 return nfs_ok;
4253}
4254
4255static __be32
4256nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4257 struct nfsd4_copy *copy)
4258{
4259 __be32 *p;
4260
e0639dc5
OK		 4261 nfserr = nfsd42_encode_write_res(resp, &copy->cp_res,
4262 copy->cp_synchronous);
bac966d6
BF		 4263 if (nfserr)
4264 return nfserr;
29ae7f9d 4265
bac966d6 4266 p = xdr_reserve_space(&resp->xdr, 4 + 4);
edcc8452 4267 *p++ = xdr_one; /* cr_consecutive */
bac966d6
BF		 4268 *p++ = cpu_to_be32(copy->cp_synchronous);
4269 return 0;
29ae7f9d
AS		 4270}
4271
6308bc98
OK		 4272static __be32
4273nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
4274 struct nfsd4_offload_status *os)
4275{
4276 struct xdr_stream *xdr = &resp->xdr;
4277 __be32 *p;
4278
4279 p = xdr_reserve_space(xdr, 8 + 4);
4280 if (!p)
4281 return nfserr_resource;
4282 p = xdr_encode_hyper(p, os->count);
4283 *p++ = cpu_to_be32(0);
4284
4285 return nfserr;
4286}
4287
24bab491
AS		 4288static __be32
4289nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4290 struct nfsd4_seek *seek)
4291{
4292 __be32 *p;
4293
24bab491
AS		 4294 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4295 *p++ = cpu_to_be32(seek->seek_eof);
4296 p = xdr_encode_hyper(p, seek->seek_pos);
4297
bac966d6 4298 return 0;
24bab491
AS		 4299}
4300
695e12f8
BH		 4301static __be32
4302nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4303{
4304 return nfserr;
4305}
4306
4307typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4308
2db134eb
AA		 4309/*
4310 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4311 * since we don't need to filter out obsolete ops as this is
4312 * done in the decoding phase.
4313 */
c1df609d 4314static const nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 4315 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4316 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4317 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4318 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4319 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4320 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4321 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4322 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4323 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4324 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4325 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4326 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4327 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4328 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4329 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4330 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 4331 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 4332 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4333 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4334 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4335 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4336 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4337 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4338 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4339 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4340 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4341 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4342 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4343 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4344 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4345 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4346 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4347 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4348 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4349 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4350 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4351 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 4352
4353 /* NFSv4.1 operations */
4354 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 4355 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 4356 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4357 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 4358 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4359 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb 4360 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc
CH		 4361#ifdef CONFIG_NFSD_PNFS
4362 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4363 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4364 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4365 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4366 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4367#else
2db134eb
AA		 4368 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4369 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4370 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4371 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4372 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc 4373#endif
22b6dee8 4374 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 4375 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4376 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 4377 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 4378 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4379 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4380 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
87a15a80
AS		 4381
4382 /* NFSv4.2 operations */
4383 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
29ae7f9d 4384 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
87a15a80
AS		 4385 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4386 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4387 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4388 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4389 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4390 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
6308bc98 4391 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status,
87a15a80 4392 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
24bab491 4393 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
87a15a80 4394 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
ffa0160a 4395 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 4396};
4397
496c262c 4398/*
a8095f7e
BF		 4399 * Calculate whether we still have space to encode repsize bytes.
4400 * There are two considerations:
4401 * - For NFS versions >=4.1, the size of the reply must stay within
4402 * session limits
4403 * - For all NFS versions, we must stay within limited preallocated
4404 * buffer space.
496c262c 4405 *
a8095f7e
BF		 4406 * This is called before the operation is processed, so can only provide
4407 * an upper estimate. For some nonidempotent operations (such as
4408 * getattr), it's not necessarily a problem if that estimate is wrong,
4409 * as we can fail it after processing without significant side effects.
496c262c 4410 */
a8095f7e 4411__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 4412{
67492c99 4413 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 4414 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 4415
47ee5298
BF		 4416 if (buf->len + respsize <= buf->buflen)
4417 return nfs_ok;
4418 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 4419 return nfserr_resource;
47ee5298
BF		 4420 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4421 WARN_ON_ONCE(1);
4422 return nfserr_rep_too_big_to_cache;
ea8d7720 4423 }
47ee5298 4424 return nfserr_rep_too_big;
496c262c
AA		 4425}
4426
1da177e4
LT		 4427void
4428nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4429{
082d4bd7 4430 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 4431 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 4432 struct svc_rqst *rqstp = resp->rqstp;
34b1744c 4433 const struct nfsd4_operation *opdesc = op->opdesc;
082d4bd7 4434 int post_err_offset;
07d1f802 4435 nfsd4_enc encoder;
bc749ca4 4436 __be32 *p;
1da177e4 4437
d0a381dd
BF		 4438 p = xdr_reserve_space(xdr, 8);
4439 if (!p) {
4440 WARN_ON_ONCE(1);
4441 return;
4442 }
c373b0a4 4443 *p++ = cpu_to_be32(op->opnum);
082d4bd7 4444 post_err_offset = xdr->buf->len;
1da177e4 4445
695e12f8
BH		 4446 if (op->opnum == OP_ILLEGAL)
4447 goto status;
b7571e4c
BF		 4448 if (op->status && opdesc &&
4449 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
4450 goto status;
695e12f8
BH		 4451 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4452 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 4453 encoder = nfsd4_enc_ops[op->opnum];
4454 op->status = encoder(resp, op->status, &op->u);
34b1744c
BF		 4455 if (opdesc && opdesc->op_release)
4456 opdesc->op_release(&op->u);
2825a7f9
BF		 4457 xdr_commit_encode(xdr);
4458
067e1ace 4459 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 4460 if (!op->status) {
4461 int space_needed = 0;
4462 if (!nfsd4_last_compound_op(rqstp))
4463 space_needed = COMPOUND_ERR_SLACK_SPACE;
4464 op->status = nfsd4_check_resp_size(resp, space_needed);
4465 }
c8f13d97
BF		 4466 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4467 struct nfsd4_slot *slot = resp->cstate.slot;
4468
4469 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4470 op->status = nfserr_rep_too_big_to_cache;
4471 else
4472 op->status = nfserr_rep_too_big;
4473 }
07d1f802
BF		 4474 if (op->status == nfserr_resource ||
4475 op->status == nfserr_rep_too_big ||
4476 op->status == nfserr_rep_too_big_to_cache) {
4477 /*
4478 * The operation may have already been encoded or
4479 * partially encoded. No op returns anything additional
4480 * in the case of one of these three errors, so we can
4481 * just truncate back to after the status. But it's a
4482 * bug if we had to do this on a non-idempotent op:
4483 */
4484 warn_on_nonidempotent_op(op);
082d4bd7 4485 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 4486 }
9411b1d4 4487 if (so) {
082d4bd7
BF		 4488 int len = xdr->buf->len - post_err_offset;
4489
9411b1d4 4490 so->so_replay.rp_status = op->status;
082d4bd7
BF		 4491 so->so_replay.rp_buflen = len;
4492 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4493 so->so_replay.rp_buf, len);
9411b1d4 4494 }
695e12f8 4495status:
082d4bd7
BF		 4496 /* Note that op->status is already in network byte order: */
4497 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 4498}
4499
4500/*
4501 * Encode the reply stored in the stateowner reply cache
4502 *
4503 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4504 * previously sent already encoded operation.
1da177e4
LT		 4505 */
4506void
d0a381dd 4507nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 4508{
bc749ca4 4509 __be32 *p;
1da177e4
LT		 4510 struct nfs4_replay *rp = op->replay;
4511
4512 BUG_ON(!rp);
4513
d0a381dd
BF		 4514 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4515 if (!p) {
4516 WARN_ON_ONCE(1);
4517 return;
4518 }
c373b0a4 4519 *p++ = cpu_to_be32(op->opnum);
1da177e4 4520 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 4521
0c0c267b 4522 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 4523}
4524
1da177e4 4525int
63f8de37 4526nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
1da177e4
LT		 4527{
4528 return xdr_ressize_check(rqstp, p);
4529}
4530
8537488b 4531void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
1da177e4 4532{
3e98abff
BF		 4533 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4534
1da177e4
LT		 4535 if (args->ops != args->iops) {
4536 kfree(args->ops);
4537 args->ops = args->iops;
4538 }
f99d49ad
JJ		 4539 kfree(args->tmpp);
4540 args->tmpp = NULL;
1da177e4 4541 while (args->to_free) {
d5e23383 4542 struct svcxdr_tmpbuf *tb = args->to_free;
1da177e4 4543 args->to_free = tb->next;
1da177e4
LT		 4544 kfree(tb);
4545 }
4546}
4547
4548int
026fec7e 4549nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
1da177e4 4550{
026fec7e
CH		 4551 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4552
e874f9f8
JL		 4553 if (rqstp->rq_arg.head[0].iov_len % 4) {
4554 /* client is nuts */
4555 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4556 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4557 return 0;
4558 }
1da177e4
LT		 4559 args->p = p;
4560 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4561 args->pagelist = rqstp->rq_arg.pages;
4562 args->pagelen = rqstp->rq_arg.page_len;
eae03e2a 4563 args->tail = false;
1da177e4
LT		 4564 args->tmpp = NULL;
4565 args->to_free = NULL;
4566 args->ops = args->iops;
4567 args->rqstp = rqstp;
4568
3e98abff 4569 return !nfsd4_decode_compound(args);
1da177e4
LT		 4570}
4571
4572int
63f8de37 4573nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
1da177e4
LT		 4574{
4575 /*
4576 * All that remains is to write the tag and operation count...
4577 */
63f8de37 4578 struct nfsd4_compoundres *resp = rqstp->rq_resp;
6ac90391
BF		 4579 struct xdr_buf *buf = resp->xdr.buf;
4580
4581 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4582 buf->tail[0].iov_len);
dd97fdde 4583
2825a7f9
BF		 4584 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4585
1da177e4
LT		 4586 p = resp->tagp;
4587 *p++ = htonl(resp->taglen);
4588 memcpy(p, resp->tag, resp->taglen);
4589 p += XDR_QUADLEN(resp->taglen);
4590 *p++ = htonl(resp->opcnt);
4591
b607664e 4592 nfsd4_sequence_done(resp);
1da177e4
LT		 4593 return 1;
4594}
4595
4596/*
4597 * Local variables:
4598 * c-basic-offset: 8
4599 * End:
4600 */
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