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nfsd: handle nfs3 timestamps as unsigned
[linux-block.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1da177e4
LT		 34 */
35
96bcad50 36#include <linux/file.h>
5a0e3ad6 37#include <linux/slab.h>
1da177e4 38#include <linux/namei.h>
341eb184 39#include <linux/statfs.h>
0733d213 40#include <linux/utsname.h>
17456804 41#include <linux/pagemap.h>
4796f457 42#include <linux/sunrpc/svcauth_gss.h>
84e1b21d 43#include <linux/sunrpc/addr.h>
9a74af21 44
2ca72e17
BF		 45#include "idmap.h"
46#include "acl.h"
9a74af21 47#include "xdr4.h"
0a3adade 48#include "vfs.h"
17456804 49#include "state.h"
1091006c 50#include "cache.h"
3d733711 51#include "netns.h"
9cf514cc 52#include "pnfs.h"
5c4583b2 53#include "filecache.h"
2ca72e17 54
18032ca0
DQ		 55#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
56#include <linux/security.h>
57#endif
58
59
1da177e4
LT		 60#define NFSDDBG_FACILITY NFSDDBG_XDR
61
5cf23dbb 62const u32 nfsd_suppattrs[3][3] = {
916d2d84
BF		 63 {NFSD4_SUPPORTED_ATTRS_WORD0,
64 NFSD4_SUPPORTED_ATTRS_WORD1,
65 NFSD4_SUPPORTED_ATTRS_WORD2},
66
67 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
68 NFSD4_1_SUPPORTED_ATTRS_WORD1,
69 NFSD4_1_SUPPORTED_ATTRS_WORD2},
70
71 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
72 NFSD4_1_SUPPORTED_ATTRS_WORD1,
73 NFSD4_2_SUPPORTED_ATTRS_WORD2},
74};
75
42ca0993
BF		 76/*
77 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
78 * directory in order to indicate to the client that a filesystem boundary is present
79 * We use a fixed fsid for a referral
80 */
81#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
82#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
83
b37ad28b 84static __be32
a36b1725 85check_filename(char *str, int len)
1da177e4
LT		 86{
87 int i;
88
89 if (len == 0)
90 return nfserr_inval;
91 if (isdotent(str, len))
a36b1725 92 return nfserr_badname;
1da177e4
LT		 93 for (i = 0; i < len; i++)
94 if (str[i] == '/')
a36b1725 95 return nfserr_badname;
1da177e4
LT		 96 return 0;
97}
98
1da177e4 99#define DECODE_HEAD \
2ebbc012 100 __be32 *p; \
b37ad28b 101 __be32 status
1da177e4
LT		 102#define DECODE_TAIL \
103 status = 0; \
104out: \
105 return status; \
106xdr_error: \
817cb9d4
CL		 107 dprintk("NFSD: xdr error (%s:%d)\n", \
108 __FILE__, __LINE__); \
1da177e4
LT		 109 status = nfserr_bad_xdr; \
110 goto out
111
1da177e4
LT		 112#define READMEM(x,nbytes) do { \
113 x = (char *)p; \
114 p += XDR_QUADLEN(nbytes); \
115} while (0)
116#define SAVEMEM(x,nbytes) do { \
117 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
118 savemem(argp, p, nbytes) : \
119 (char *)p)) { \
817cb9d4
CL		 120 dprintk("NFSD: xdr error (%s:%d)\n", \
121 __FILE__, __LINE__); \
1da177e4
LT		 122 goto xdr_error; \
123 } \
124 p += XDR_QUADLEN(nbytes); \
125} while (0)
126#define COPYMEM(x,nbytes) do { \
127 memcpy((x), p, nbytes); \
128 p += XDR_QUADLEN(nbytes); \
129} while (0)
130
131/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
132#define READ_BUF(nbytes) do { \
133 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
134 p = argp->p; \
135 argp->p += XDR_QUADLEN(nbytes); \
136 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 137 dprintk("NFSD: xdr error (%s:%d)\n", \
138 __FILE__, __LINE__); \
1da177e4
LT		 139 goto xdr_error; \
140 } \
141} while (0)
142
590b7431
BF		 143static void next_decode_page(struct nfsd4_compoundargs *argp)
144{
590b7431 145 argp->p = page_address(argp->pagelist[0]);
365da4ad 146 argp->pagelist++;
590b7431 147 if (argp->pagelen < PAGE_SIZE) {
fc788f64 148 argp->end = argp->p + XDR_QUADLEN(argp->pagelen);
590b7431
BF		 149 argp->pagelen = 0;
150 } else {
151 argp->end = argp->p + (PAGE_SIZE>>2);
152 argp->pagelen -= PAGE_SIZE;
153 }
154}
155
ca2a05aa 156static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 157{
158 /* We want more bytes than seem to be available.
159 * Maybe we need a new page, maybe we have just run out
160 */
ca2a05aa 161 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 162 __be32 *p;
eae03e2a
CL		 163
164 if (argp->pagelen == 0) {
165 struct kvec *vec = &argp->rqstp->rq_arg.tail[0];
166
167 if (!argp->tail) {
168 argp->tail = true;
169 avail = vec->iov_len;
170 argp->p = vec->iov_base;
171 argp->end = vec->iov_base + avail;
172 }
173
174 if (avail < nbytes)
175 return NULL;
176
177 p = argp->p;
178 argp->p += XDR_QUADLEN(nbytes);
179 return p;
180 }
181
1da177e4
LT		 182 if (avail + argp->pagelen < nbytes)
183 return NULL;
184 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
185 return NULL;
186 /* ok, we can do it with the current plus the next page */
187 if (nbytes <= sizeof(argp->tmp))
188 p = argp->tmp;
189 else {
f99d49ad 190 kfree(argp->tmpp);
1da177e4
LT		 191 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
192 if (!p)
193 return NULL;
194
195 }
ca2a05aa
BF		 196 /*
197 * The following memcpy is safe because read_buf is always
198 * called with nbytes > avail, and the two cases above both
199 * guarantee p points to at least nbytes bytes.
200 */
1da177e4 201 memcpy(p, argp->p, avail);
590b7431 202 next_decode_page(argp);
1da177e4
LT		 203 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
204 argp->p += XDR_QUADLEN(nbytes - avail);
205 return p;
206}
207
2b86e3aa
BF		 208static unsigned int compoundargs_bytes_left(struct nfsd4_compoundargs *argp)
209{
210 unsigned int this = (char *)argp->end - (char *)argp->p;
211
212 return this + argp->pagelen;
213}
214
60adfc50
AA		 215static int zero_clientid(clientid_t *clid)
216{
217 return (clid->cl_boot == 0) && (clid->cl_id == 0);
218}
219
2d8498db 220/**
d5e23383 221 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
ce043ac8 222 * @argp: NFSv4 compound argument structure
ed992753 223 * @len: length of buffer to allocate
2d8498db 224 *
ed992753
TM		 225 * Allocates a buffer of size @len to be freed when processing the compound
226 * operation described in @argp finishes.
2d8498db 227 */
d5e23383
BF		 228static void *
229svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
1da177e4 230{
d5e23383 231 struct svcxdr_tmpbuf *tb;
1da177e4 232
d5e23383 233 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
1da177e4 234 if (!tb)
d5e23383 235 return NULL;
1da177e4
LT		 236 tb->next = argp->to_free;
237 argp->to_free = tb;
d5e23383 238 return tb->buf;
1da177e4
LT		 239}
240
29c353b3
BF		 241/*
242 * For xdr strings that need to be passed to other kernel api's
243 * as null-terminated strings.
244 *
245 * Note null-terminating in place usually isn't safe since the
246 * buffer might end on a page boundary.
247 */
248static char *
249svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
250{
d5e23383 251 char *p = svcxdr_tmpalloc(argp, len + 1);
29c353b3
BF		 252
253 if (!p)
254 return NULL;
255 memcpy(p, buf, len);
256 p[len] = '\0';
29c353b3 257 return p;
1da177e4
LT		 258}
259
2d8498db
CH		 260/**
261 * savemem - duplicate a chunk of memory for later processing
262 * @argp: NFSv4 compound argument structure to be freed with
263 * @p: pointer to be duplicated
264 * @nbytes: length to be duplicated
265 *
266 * Returns a pointer to a copy of @nbytes bytes of memory at @p
267 * that are preserved until processing of the NFSv4 compound
268 * operation described by @argp finishes.
269 */
2ebbc012 270static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 271{
d5e23383
BF		 272 void *ret;
273
274 ret = svcxdr_tmpalloc(argp, nbytes);
275 if (!ret)
1da177e4 276 return NULL;
d5e23383
BF		 277 memcpy(ret, p, nbytes);
278 return ret;
1da177e4
LT		 279}
280
4c94e13e 281static __be32
bdba5368 282nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
4c94e13e
CH		 283{
284 DECODE_HEAD;
4c94e13e
CH		 285
286 READ_BUF(12);
bdba5368 287 p = xdr_decode_hyper(p, &tv->tv_sec);
4c94e13e
CH		 288 tv->tv_nsec = be32_to_cpup(p++);
289 if (tv->tv_nsec >= (u32)1000000000)
290 return nfserr_inval;
291
292 DECODE_TAIL;
293}
294
b37ad28b 295static __be32
1da177e4
LT		 296nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
297{
298 u32 bmlen;
299 DECODE_HEAD;
300
301 bmval[0] = 0;
302 bmval[1] = 0;
7e705706 303 bmval[2] = 0;
1da177e4
LT		 304
305 READ_BUF(4);
06553991 306 bmlen = be32_to_cpup(p++);
1da177e4
LT		 307 if (bmlen > 1000)
308 goto xdr_error;
309
310 READ_BUF(bmlen << 2);
311 if (bmlen > 0)
06553991 312 bmval[0] = be32_to_cpup(p++);
1da177e4 313 if (bmlen > 1)
06553991 314 bmval[1] = be32_to_cpup(p++);
7e705706 315 if (bmlen > 2)
06553991 316 bmval[2] = be32_to_cpup(p++);
1da177e4
LT		 317
318 DECODE_TAIL;
319}
320
b37ad28b 321static __be32
3c8e0316 322nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0 323 struct iattr *iattr, struct nfs4_acl **acl,
47057abd 324 struct xdr_netobj *label, int *umask)
1da177e4
LT		 325{
326 int expected_len, len = 0;
327 u32 dummy32;
328 char *buf;
329
330 DECODE_HEAD;
331 iattr->ia_valid = 0;
332 if ((status = nfsd4_decode_bitmap(argp, bmval)))
333 return status;
334
e864c189
BF		 335 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
336 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
337 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
338 if (nfsd_attrs_supported(argp->minorversion, bmval))
339 return nfserr_inval;
340 return nfserr_attrnotsupp;
341 }
342
1da177e4 343 READ_BUF(4);
06553991 344 expected_len = be32_to_cpup(p++);
1da177e4
LT		 345
346 if (bmval[0] & FATTR4_WORD0_SIZE) {
347 READ_BUF(8);
348 len += 8;
542d1ab3 349 p = xdr_decode_hyper(p, &iattr->ia_size);
1da177e4
LT		 350 iattr->ia_valid |= ATTR_SIZE;
351 }
352 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 353 u32 nace;
28e05dd8 354 struct nfs4_ace *ace;
1da177e4
LT		 355
356 READ_BUF(4); len += 4;
06553991 357 nace = be32_to_cpup(p++);
1da177e4 358
2b86e3aa
BF		 359 if (nace > compoundargs_bytes_left(argp)/20)
360 /*
361 * Even with 4-byte names there wouldn't be
362 * space for that many aces; something fishy is
363 * going on:
364 */
798df338 365 return nfserr_fbig;
28e05dd8 366
d5e23383 367 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
eba1c99c
KM		 368 if (*acl == NULL)
369 return nfserr_jukebox;
370
28e05dd8
BF		 371 (*acl)->naces = nace;
372 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 373 READ_BUF(16); len += 16;
06553991
BF		 374 ace->type = be32_to_cpup(p++);
375 ace->flag = be32_to_cpup(p++);
376 ace->access_mask = be32_to_cpup(p++);
377 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 378 READ_BUF(dummy32);
379 len += XDR_QUADLEN(dummy32) << 2;
380 READMEM(buf, dummy32);
28e05dd8 381 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 382 status = nfs_ok;
28e05dd8 383 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 384 ;
28e05dd8 385 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 386 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 387 buf, dummy32, &ace->who_gid);
1da177e4 388 else
3c726023 389 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 390 buf, dummy32, &ace->who_uid);
3c726023
BF		 391 if (status)
392 return status;
1da177e4
LT		 393 }
394 } else
395 *acl = NULL;
396 if (bmval[1] & FATTR4_WORD1_MODE) {
397 READ_BUF(4);
398 len += 4;
06553991 399 iattr->ia_mode = be32_to_cpup(p++);
1da177e4
LT		 400 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
401 iattr->ia_valid |= ATTR_MODE;
402 }
403 if (bmval[1] & FATTR4_WORD1_OWNER) {
404 READ_BUF(4);
405 len += 4;
06553991 406 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 407 READ_BUF(dummy32);
408 len += (XDR_QUADLEN(dummy32) << 2);
409 READMEM(buf, dummy32);
47c85291
N		 410 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
411 return status;
1da177e4
LT		 412 iattr->ia_valid |= ATTR_UID;
413 }
414 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
415 READ_BUF(4);
416 len += 4;
06553991 417 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 418 READ_BUF(dummy32);
419 len += (XDR_QUADLEN(dummy32) << 2);
420 READMEM(buf, dummy32);
47c85291
N		 421 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
422 return status;
1da177e4
LT		 423 iattr->ia_valid |= ATTR_GID;
424 }
425 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
426 READ_BUF(4);
427 len += 4;
06553991 428 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 429 switch (dummy32) {
430 case NFS4_SET_TO_CLIENT_TIME:
1da177e4 431 len += 12;
bdba5368 432 status = nfsd4_decode_time(argp, &iattr->ia_atime);
4c94e13e
CH		 433 if (status)
434 return status;
1da177e4
LT		 435 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
436 break;
437 case NFS4_SET_TO_SERVER_TIME:
438 iattr->ia_valid |= ATTR_ATIME;
439 break;
440 default:
441 goto xdr_error;
442 }
443 }
1da177e4
LT		 444 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
445 READ_BUF(4);
446 len += 4;
06553991 447 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 448 switch (dummy32) {
449 case NFS4_SET_TO_CLIENT_TIME:
1da177e4 450 len += 12;
bdba5368 451 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
4c94e13e
CH		 452 if (status)
453 return status;
1da177e4
LT		 454 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
455 break;
456 case NFS4_SET_TO_SERVER_TIME:
457 iattr->ia_valid |= ATTR_MTIME;
458 break;
459 default:
460 goto xdr_error;
461 }
462 }
18032ca0
DQ		 463
464 label->len = 0;
2285ae76
AB		 465 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
466 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
18032ca0
DQ		 467 READ_BUF(4);
468 len += 4;
06553991 469 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
18032ca0
DQ		 470 READ_BUF(4);
471 len += 4;
06553991 472 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
18032ca0
DQ		 473 READ_BUF(4);
474 len += 4;
06553991 475 dummy32 = be32_to_cpup(p++);
18032ca0 476 READ_BUF(dummy32);
1ec8c0c4 477 if (dummy32 > NFS4_MAXLABELLEN)
18032ca0
DQ		 478 return nfserr_badlabel;
479 len += (XDR_QUADLEN(dummy32) << 2);
480 READMEM(buf, dummy32);
29c353b3
BF		 481 label->len = dummy32;
482 label->data = svcxdr_dupstr(argp, buf, dummy32);
18032ca0
DQ		 483 if (!label->data)
484 return nfserr_jukebox;
18032ca0 485 }
47057abd
AG		 486 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
487 if (!umask)
488 goto xdr_error;
489 READ_BUF(8);
490 len += 8;
491 dummy32 = be32_to_cpup(p++);
492 iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO);
493 dummy32 = be32_to_cpup(p++);
494 *umask = dummy32 & S_IRWXUGO;
495 iattr->ia_valid |= ATTR_MODE;
496 }
e864c189 497 if (len != expected_len)
1da177e4
LT		 498 goto xdr_error;
499
500 DECODE_TAIL;
1da177e4
LT		 501}
502
e31a1b66
BH		 503static __be32
504nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
505{
506 DECODE_HEAD;
507
508 READ_BUF(sizeof(stateid_t));
06553991 509 sid->si_generation = be32_to_cpup(p++);
e31a1b66
BH		 510 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
511
512 DECODE_TAIL;
513}
514
b37ad28b 515static __be32
1da177e4
LT		 516nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
517{
518 DECODE_HEAD;
519
520 READ_BUF(4);
06553991 521 access->ac_req_access = be32_to_cpup(p++);
1da177e4
LT		 522
523 DECODE_TAIL;
524}
525
acb2887e
BF		 526static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
527{
528 DECODE_HEAD;
e45d1a18 529 struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
12fc3e92 530 u32 dummy, uid, gid;
acb2887e
BF		 531 char *machine_name;
532 int i;
533 int nr_secflavs;
534
535 /* callback_sec_params4 */
536 READ_BUF(4);
06553991 537 nr_secflavs = be32_to_cpup(p++);
57569a70
BF		 538 if (nr_secflavs)
539 cbs->flavor = (u32)(-1);
540 else
541 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
542 cbs->flavor = 0;
acb2887e
BF		 543 for (i = 0; i < nr_secflavs; ++i) {
544 READ_BUF(4);
06553991 545 dummy = be32_to_cpup(p++);
acb2887e
BF		 546 switch (dummy) {
547 case RPC_AUTH_NULL:
548 /* Nothing to read */
12fc3e92
BF		 549 if (cbs->flavor == (u32)(-1))
550 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 551 break;
552 case RPC_AUTH_UNIX:
553 READ_BUF(8);
554 /* stamp */
06553991 555 dummy = be32_to_cpup(p++);
acb2887e
BF		 556
557 /* machine name */
06553991 558 dummy = be32_to_cpup(p++);
acb2887e
BF		 559 READ_BUF(dummy);
560 SAVEMEM(machine_name, dummy);
561
562 /* uid, gid */
563 READ_BUF(8);
06553991
BF		 564 uid = be32_to_cpup(p++);
565 gid = be32_to_cpup(p++);
acb2887e
BF		 566
567 /* more gids */
568 READ_BUF(4);
06553991 569 dummy = be32_to_cpup(p++);
acb2887e 570 READ_BUF(dummy * 4);
12fc3e92 571 if (cbs->flavor == (u32)(-1)) {
e45d1a18
TM		 572 kuid_t kuid = make_kuid(userns, uid);
573 kgid_t kgid = make_kgid(userns, gid);
03bc6d1c
EB		 574 if (uid_valid(kuid) && gid_valid(kgid)) {
575 cbs->uid = kuid;
576 cbs->gid = kgid;
577 cbs->flavor = RPC_AUTH_UNIX;
578 } else {
579 dprintk("RPC_AUTH_UNIX with invalid"
580 "uid or gid ignoring!\n");
581 }
12fc3e92 582 }
acb2887e
BF		 583 break;
584 case RPC_AUTH_GSS:
585 dprintk("RPC_AUTH_GSS callback secflavor "
586 "not supported!\n");
587 READ_BUF(8);
588 /* gcbp_service */
06553991 589 dummy = be32_to_cpup(p++);
acb2887e 590 /* gcbp_handle_from_server */
06553991 591 dummy = be32_to_cpup(p++);
acb2887e
BF		 592 READ_BUF(dummy);
593 p += XDR_QUADLEN(dummy);
594 /* gcbp_handle_from_client */
595 READ_BUF(4);
06553991 596 dummy = be32_to_cpup(p++);
acb2887e
BF		 597 READ_BUF(dummy);
598 break;
599 default:
600 dprintk("Illegal callback secflavor\n");
601 return nfserr_inval;
602 }
603 }
604 DECODE_TAIL;
605}
606
cb73a9f4
BF		 607static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
608{
609 DECODE_HEAD;
610
611 READ_BUF(4);
06553991 612 bc->bc_cb_program = be32_to_cpup(p++);
cb73a9f4
BF		 613 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
614
615 DECODE_TAIL;
616}
617
1d1bc8f2
BF		 618static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
619{
620 DECODE_HEAD;
1d1bc8f2
BF		 621
622 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
623 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991 624 bcts->dir = be32_to_cpup(p++);
6ce2357f
BS		 625 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
626 * could help us figure out we should be using it. */
1d1bc8f2
BF		 627 DECODE_TAIL;
628}
629
b37ad28b 630static __be32
1da177e4
LT		 631nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
632{
633 DECODE_HEAD;
634
e31a1b66 635 READ_BUF(4);
06553991 636 close->cl_seqid = be32_to_cpup(p++);
e31a1b66 637 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 638
639 DECODE_TAIL;
640}
641
642
b37ad28b 643static __be32
1da177e4
LT		 644nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
645{
646 DECODE_HEAD;
647
648 READ_BUF(12);
542d1ab3 649 p = xdr_decode_hyper(p, &commit->co_offset);
06553991 650 commit->co_count = be32_to_cpup(p++);
1da177e4
LT		 651
652 DECODE_TAIL;
653}
654
b37ad28b 655static __be32
1da177e4
LT		 656nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
657{
658 DECODE_HEAD;
659
660 READ_BUF(4);
06553991 661 create->cr_type = be32_to_cpup(p++);
1da177e4
LT		 662 switch (create->cr_type) {
663 case NF4LNK:
664 READ_BUF(4);
7fb84306
BF		 665 create->cr_datalen = be32_to_cpup(p++);
666 READ_BUF(create->cr_datalen);
29c353b3 667 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
7fb84306 668 if (!create->cr_data)
76f47128 669 return nfserr_jukebox;
1da177e4
LT		 670 break;
671 case NF4BLK:
672 case NF4CHR:
673 READ_BUF(8);
06553991
BF		 674 create->cr_specdata1 = be32_to_cpup(p++);
675 create->cr_specdata2 = be32_to_cpup(p++);
1da177e4
LT		 676 break;
677 case NF4SOCK:
678 case NF4FIFO:
679 case NF4DIR:
680 default:
681 break;
682 }
683
684 READ_BUF(4);
06553991 685 create->cr_namelen = be32_to_cpup(p++);
1da177e4
LT		 686 READ_BUF(create->cr_namelen);
687 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 688 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 689 return status;
690
3c8e0316 691 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
47057abd 692 &create->cr_acl, &create->cr_label,
880a3a53 693 &create->cr_umask);
c0d6fc8a 694 if (status)
1da177e4
LT		 695 goto out;
696
697 DECODE_TAIL;
698}
699
b37ad28b 700static inline __be32
1da177e4
LT		 701nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
702{
e31a1b66 703 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 704}
705
b37ad28b 706static inline __be32
1da177e4
LT		 707nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
708{
709 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
710}
711
b37ad28b 712static __be32
1da177e4
LT		 713nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
714{
715 DECODE_HEAD;
716
717 READ_BUF(4);
06553991 718 link->li_namelen = be32_to_cpup(p++);
1da177e4
LT		 719 READ_BUF(link->li_namelen);
720 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 721 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 722 return status;
723
724 DECODE_TAIL;
725}
726
b37ad28b 727static __be32
1da177e4
LT		 728nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
729{
730 DECODE_HEAD;
731
1da177e4
LT		 732 /*
733 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
734 */
735 READ_BUF(28);
06553991 736 lock->lk_type = be32_to_cpup(p++);
1da177e4
LT		 737 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
738 goto xdr_error;
06553991 739 lock->lk_reclaim = be32_to_cpup(p++);
542d1ab3
BF		 740 p = xdr_decode_hyper(p, &lock->lk_offset);
741 p = xdr_decode_hyper(p, &lock->lk_length);
06553991 742 lock->lk_is_new = be32_to_cpup(p++);
1da177e4
LT		 743
744 if (lock->lk_is_new) {
e31a1b66 745 READ_BUF(4);
06553991 746 lock->lk_new_open_seqid = be32_to_cpup(p++);
e31a1b66
BH		 747 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
748 if (status)
749 return status;
750 READ_BUF(8 + sizeof(clientid_t));
06553991 751 lock->lk_new_lock_seqid = be32_to_cpup(p++);
1da177e4 752 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
06553991 753 lock->lk_new_owner.len = be32_to_cpup(p++);
1da177e4
LT		 754 READ_BUF(lock->lk_new_owner.len);
755 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
756 } else {
e31a1b66
BH		 757 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
758 if (status)
759 return status;
760 READ_BUF(4);
06553991 761 lock->lk_old_lock_seqid = be32_to_cpup(p++);
1da177e4
LT		 762 }
763
764 DECODE_TAIL;
765}
766
b37ad28b 767static __be32
1da177e4
LT		 768nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
769{
770 DECODE_HEAD;
771
772 READ_BUF(32);
06553991 773 lockt->lt_type = be32_to_cpup(p++);
1da177e4
LT		 774 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
775 goto xdr_error;
542d1ab3
BF		 776 p = xdr_decode_hyper(p, &lockt->lt_offset);
777 p = xdr_decode_hyper(p, &lockt->lt_length);
1da177e4 778 COPYMEM(&lockt->lt_clientid, 8);
06553991 779 lockt->lt_owner.len = be32_to_cpup(p++);
1da177e4
LT		 780 READ_BUF(lockt->lt_owner.len);
781 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
782
783 DECODE_TAIL;
784}
785
b37ad28b 786static __be32
1da177e4
LT		 787nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
788{
789 DECODE_HEAD;
790
e31a1b66 791 READ_BUF(8);
06553991 792 locku->lu_type = be32_to_cpup(p++);
1da177e4
LT		 793 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
794 goto xdr_error;
06553991 795 locku->lu_seqid = be32_to_cpup(p++);
e31a1b66
BH		 796 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
797 if (status)
798 return status;
799 READ_BUF(16);
542d1ab3
BF		 800 p = xdr_decode_hyper(p, &locku->lu_offset);
801 p = xdr_decode_hyper(p, &locku->lu_length);
1da177e4
LT		 802
803 DECODE_TAIL;
804}
805
b37ad28b 806static __be32
1da177e4
LT		 807nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
808{
809 DECODE_HEAD;
810
811 READ_BUF(4);
06553991 812 lookup->lo_len = be32_to_cpup(p++);
1da177e4
LT		 813 READ_BUF(lookup->lo_len);
814 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 815 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 816 return status;
817
818 DECODE_TAIL;
819}
820
2c8bd7e0 821static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 822{
823 __be32 *p;
824 u32 w;
825
826 READ_BUF(4);
06553991 827 w = be32_to_cpup(p++);
2c8bd7e0
BH		 828 *share_access = w & NFS4_SHARE_ACCESS_MASK;
829 *deleg_want = w & NFS4_SHARE_WANT_MASK;
830 if (deleg_when)
831 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
832
04f9e664
BF		 833 switch (w & NFS4_SHARE_ACCESS_MASK) {
834 case NFS4_SHARE_ACCESS_READ:
835 case NFS4_SHARE_ACCESS_WRITE:
836 case NFS4_SHARE_ACCESS_BOTH:
837 break;
838 default:
839 return nfserr_bad_xdr;
840 }
fc0d14fe 841 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 842 if (!w)
843 return nfs_ok;
844 if (!argp->minorversion)
845 return nfserr_bad_xdr;
846 switch (w & NFS4_SHARE_WANT_MASK) {
847 case NFS4_SHARE_WANT_NO_PREFERENCE:
848 case NFS4_SHARE_WANT_READ_DELEG:
849 case NFS4_SHARE_WANT_WRITE_DELEG:
850 case NFS4_SHARE_WANT_ANY_DELEG:
851 case NFS4_SHARE_WANT_NO_DELEG:
852 case NFS4_SHARE_WANT_CANCEL:
853 break;
854 default:
855 return nfserr_bad_xdr;
856 }
92bac8c5 857 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 858 if (!w)
859 return nfs_ok;
2c8bd7e0
BH		 860
861 if (!deleg_when) /* open_downgrade */
862 return nfserr_inval;
04f9e664
BF		 863 switch (w) {
864 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
865 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 866 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
867 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 868 return nfs_ok;
869 }
870xdr_error:
871 return nfserr_bad_xdr;
872}
873
874static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
875{
876 __be32 *p;
877
878 READ_BUF(4);
06553991 879 *x = be32_to_cpup(p++);
04f9e664 880 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 881 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 882 return nfserr_bad_xdr;
883 return nfs_ok;
884xdr_error:
885 return nfserr_bad_xdr;
886}
887
a084daf5
BF		 888static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
889{
890 __be32 *p;
891
892 READ_BUF(4);
06553991 893 o->len = be32_to_cpup(p++);
a084daf5
BF		 894
895 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
896 return nfserr_bad_xdr;
897
898 READ_BUF(o->len);
899 SAVEMEM(o->data, o->len);
900 return nfs_ok;
901xdr_error:
902 return nfserr_bad_xdr;
903}
904
b37ad28b 905static __be32
1da177e4
LT		 906nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
907{
908 DECODE_HEAD;
2c8bd7e0 909 u32 dummy;
1da177e4
LT		 910
911 memset(open->op_bmval, 0, sizeof(open->op_bmval));
912 open->op_iattr.ia_valid = 0;
fe0750e5 913 open->op_openowner = NULL;
1da177e4 914
9d313b17 915 open->op_xdr_error = 0;
1da177e4 916 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 917 READ_BUF(4);
06553991 918 open->op_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 919 /* decode, yet ignore deleg_when until supported */
920 status = nfsd4_decode_share_access(argp, &open->op_share_access,
921 &open->op_deleg_want, &dummy);
04f9e664
BF		 922 if (status)
923 goto xdr_error;
924 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
925 if (status)
926 goto xdr_error;
a084daf5 927 READ_BUF(sizeof(clientid_t));
1da177e4 928 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 929 status = nfsd4_decode_opaque(argp, &open->op_owner);
930 if (status)
931 goto xdr_error;
932 READ_BUF(4);
06553991 933 open->op_create = be32_to_cpup(p++);
1da177e4
LT		 934 switch (open->op_create) {
935 case NFS4_OPEN_NOCREATE:
936 break;
937 case NFS4_OPEN_CREATE:
938 READ_BUF(4);
06553991 939 open->op_createmode = be32_to_cpup(p++);
1da177e4
LT		 940 switch (open->op_createmode) {
941 case NFS4_CREATE_UNCHECKED:
942 case NFS4_CREATE_GUARDED:
c0d6fc8a 943 status = nfsd4_decode_fattr(argp, open->op_bmval,
47057abd 944 &open->op_iattr, &open->op_acl, &open->op_label,
880a3a53 945 &open->op_umask);
c0d6fc8a 946 if (status)
1da177e4
LT		 947 goto out;
948 break;
949 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 950 READ_BUF(NFS4_VERIFIER_SIZE);
951 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 952 break;
79fb54ab
BH		 953 case NFS4_CREATE_EXCLUSIVE4_1:
954 if (argp->minorversion < 1)
955 goto xdr_error;
ab4684d1
CL		 956 READ_BUF(NFS4_VERIFIER_SIZE);
957 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 958 status = nfsd4_decode_fattr(argp, open->op_bmval,
47057abd 959 &open->op_iattr, &open->op_acl, &open->op_label,
880a3a53 960 &open->op_umask);
79fb54ab
BH		 961 if (status)
962 goto out;
963 break;
1da177e4
LT		 964 default:
965 goto xdr_error;
966 }
967 break;
968 default:
969 goto xdr_error;
970 }
971
972 /* open_claim */
973 READ_BUF(4);
06553991 974 open->op_claim_type = be32_to_cpup(p++);
1da177e4
LT		 975 switch (open->op_claim_type) {
976 case NFS4_OPEN_CLAIM_NULL:
977 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
978 READ_BUF(4);
06553991 979 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 980 READ_BUF(open->op_fname.len);
981 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 982 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 983 return status;
984 break;
985 case NFS4_OPEN_CLAIM_PREVIOUS:
986 READ_BUF(4);
06553991 987 open->op_delegate_type = be32_to_cpup(p++);
1da177e4
LT		 988 break;
989 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 990 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
991 if (status)
992 return status;
993 READ_BUF(4);
06553991 994 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 995 READ_BUF(open->op_fname.len);
996 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 997 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 998 return status;
999 break;
8b289b2c
BF		 1000 case NFS4_OPEN_CLAIM_FH:
1001 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1002 if (argp->minorversion < 1)
1003 goto xdr_error;
1004 /* void */
1005 break;
1006 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1007 if (argp->minorversion < 1)
1008 goto xdr_error;
1009 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
1010 if (status)
1011 return status;
1012 break;
1da177e4
LT		 1013 default:
1014 goto xdr_error;
1015 }
1016
1017 DECODE_TAIL;
1018}
1019
b37ad28b 1020static __be32
1da177e4
LT		 1021nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1022{
1023 DECODE_HEAD;
e1a90ebd
AS		 1024
1025 if (argp->minorversion >= 1)
1026 return nfserr_notsupp;
1027
e31a1b66
BH		 1028 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
1029 if (status)
1030 return status;
1031 READ_BUF(4);
06553991 1032 open_conf->oc_seqid = be32_to_cpup(p++);
e1a90ebd 1033
1da177e4
LT		 1034 DECODE_TAIL;
1035}
1036
b37ad28b 1037static __be32
1da177e4
LT		 1038nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1039{
1040 DECODE_HEAD;
1041
e31a1b66
BH		 1042 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
1043 if (status)
1044 return status;
04f9e664 1045 READ_BUF(4);
06553991 1046 open_down->od_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 1047 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1048 &open_down->od_deleg_want, NULL);
04f9e664
BF		 1049 if (status)
1050 return status;
1051 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1052 if (status)
1053 return status;
1da177e4
LT		 1054 DECODE_TAIL;
1055}
1056
b37ad28b 1057static __be32
1da177e4
LT		 1058nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1059{
1060 DECODE_HEAD;
1061
1062 READ_BUF(4);
06553991 1063 putfh->pf_fhlen = be32_to_cpup(p++);
1da177e4
LT		 1064 if (putfh->pf_fhlen > NFS4_FHSIZE)
1065 goto xdr_error;
1066 READ_BUF(putfh->pf_fhlen);
1067 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1068
1069 DECODE_TAIL;
1070}
1071
e1a90ebd
AS		 1072static __be32
1073nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1074{
1075 if (argp->minorversion == 0)
1076 return nfs_ok;
1077 return nfserr_notsupp;
1078}
1079
b37ad28b 1080static __be32
1da177e4
LT		 1081nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1082{
1083 DECODE_HEAD;
1084
e31a1b66
BH		 1085 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1086 if (status)
1087 return status;
1088 READ_BUF(12);
542d1ab3 1089 p = xdr_decode_hyper(p, &read->rd_offset);
06553991 1090 read->rd_length = be32_to_cpup(p++);
1da177e4
LT		 1091
1092 DECODE_TAIL;
1093}
1094
b37ad28b 1095static __be32
1da177e4
LT		 1096nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1097{
1098 DECODE_HEAD;
1099
1100 READ_BUF(24);
542d1ab3 1101 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1da177e4 1102 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
06553991
BF		 1103 readdir->rd_dircount = be32_to_cpup(p++);
1104 readdir->rd_maxcount = be32_to_cpup(p++);
1da177e4
LT		 1105 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1106 goto out;
1107
1108 DECODE_TAIL;
1109}
1110
b37ad28b 1111static __be32
1da177e4
LT		 1112nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1113{
1114 DECODE_HEAD;
1115
1116 READ_BUF(4);
06553991 1117 remove->rm_namelen = be32_to_cpup(p++);
1da177e4
LT		 1118 READ_BUF(remove->rm_namelen);
1119 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1120 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1121 return status;
1122
1123 DECODE_TAIL;
1124}
1125
b37ad28b 1126static __be32
1da177e4
LT		 1127nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1128{
1129 DECODE_HEAD;
1130
1131 READ_BUF(4);
06553991 1132 rename->rn_snamelen = be32_to_cpup(p++);
4aed9c46 1133 READ_BUF(rename->rn_snamelen);
1da177e4 1134 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
4aed9c46 1135 READ_BUF(4);
06553991 1136 rename->rn_tnamelen = be32_to_cpup(p++);
1da177e4
LT		 1137 READ_BUF(rename->rn_tnamelen);
1138 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1139 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1140 return status;
a36b1725 1141 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1142 return status;
1143
1144 DECODE_TAIL;
1145}
1146
b37ad28b 1147static __be32
1da177e4
LT		 1148nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1149{
1150 DECODE_HEAD;
1151
e1a90ebd
AS		 1152 if (argp->minorversion >= 1)
1153 return nfserr_notsupp;
1154
1da177e4
LT		 1155 READ_BUF(sizeof(clientid_t));
1156 COPYMEM(clientid, sizeof(clientid_t));
1157
1158 DECODE_TAIL;
1159}
1160
dcb488a3
AA		 1161static __be32
1162nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1163 struct nfsd4_secinfo *secinfo)
1164{
1165 DECODE_HEAD;
1166
1167 READ_BUF(4);
06553991 1168 secinfo->si_namelen = be32_to_cpup(p++);
dcb488a3
AA		 1169 READ_BUF(secinfo->si_namelen);
1170 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1171 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1172 if (status)
1173 return status;
1174 DECODE_TAIL;
1175}
1176
04f4ad16
BF		 1177static __be32
1178nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1179 struct nfsd4_secinfo_no_name *sin)
1180{
1181 DECODE_HEAD;
1182
1183 READ_BUF(4);
06553991 1184 sin->sin_style = be32_to_cpup(p++);
04f4ad16
BF		 1185 DECODE_TAIL;
1186}
1187
b37ad28b 1188static __be32
1da177e4
LT		 1189nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1190{
e31a1b66 1191 __be32 status;
1da177e4 1192
e31a1b66
BH		 1193 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1194 if (status)
1195 return status;
3c8e0316 1196 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
47057abd 1197 &setattr->sa_acl, &setattr->sa_label, NULL);
1da177e4
LT		 1198}
1199
b37ad28b 1200static __be32
1da177e4
LT		 1201nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1202{
1203 DECODE_HEAD;
1204
e1a90ebd
AS		 1205 if (argp->minorversion >= 1)
1206 return nfserr_notsupp;
1207
ab4684d1
CL		 1208 READ_BUF(NFS4_VERIFIER_SIZE);
1209 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1210
a084daf5
BF		 1211 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1212 if (status)
1213 return nfserr_bad_xdr;
1214 READ_BUF(8);
06553991
BF		 1215 setclientid->se_callback_prog = be32_to_cpup(p++);
1216 setclientid->se_callback_netid_len = be32_to_cpup(p++);
4aed9c46 1217 READ_BUF(setclientid->se_callback_netid_len);
1da177e4 1218 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
4aed9c46 1219 READ_BUF(4);
06553991 1220 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1da177e4 1221
4aed9c46 1222 READ_BUF(setclientid->se_callback_addr_len);
1da177e4 1223 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
4aed9c46 1224 READ_BUF(4);
06553991 1225 setclientid->se_callback_ident = be32_to_cpup(p++);
1da177e4
LT		 1226
1227 DECODE_TAIL;
1228}
1229
b37ad28b 1230static __be32
1da177e4
LT		 1231nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1232{
1233 DECODE_HEAD;
1234
e1a90ebd
AS		 1235 if (argp->minorversion >= 1)
1236 return nfserr_notsupp;
1237
ab4684d1 1238 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1239 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1240 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1241
1242 DECODE_TAIL;
1243}
1244
1245/* Also used for NVERIFY */
b37ad28b 1246static __be32
1da177e4
LT		 1247nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1248{
1da177e4
LT		 1249 DECODE_HEAD;
1250
1251 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1252 goto out;
1253
1254 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1255 * nfsd4_proc_verify */
1256
1da177e4 1257 READ_BUF(4);
06553991 1258 verify->ve_attrlen = be32_to_cpup(p++);
1da177e4
LT		 1259 READ_BUF(verify->ve_attrlen);
1260 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1261
1262 DECODE_TAIL;
1263}
1264
b37ad28b 1265static __be32
1da177e4
LT		 1266nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1267{
1268 int avail;
1da177e4
LT		 1269 int len;
1270 DECODE_HEAD;
1271
e31a1b66
BH		 1272 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1273 if (status)
1274 return status;
1275 READ_BUF(16);
542d1ab3 1276 p = xdr_decode_hyper(p, &write->wr_offset);
06553991 1277 write->wr_stable_how = be32_to_cpup(p++);
54bbb7d2 1278 if (write->wr_stable_how > NFS_FILE_SYNC)
1da177e4 1279 goto xdr_error;
06553991 1280 write->wr_buflen = be32_to_cpup(p++);
1da177e4
LT		 1281
1282 /* Sorry .. no magic macros for this.. *
1283 * READ_BUF(write->wr_buflen);
1284 * SAVEMEM(write->wr_buf, write->wr_buflen);
1285 */
1286 avail = (char*)argp->end - (char*)argp->p;
1287 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1288 dprintk("NFSD: xdr error (%s:%d)\n",
1289 __FILE__, __LINE__);
1da177e4
LT		 1290 goto xdr_error;
1291 }
70cc7f75
BF		 1292 write->wr_head.iov_base = p;
1293 write->wr_head.iov_len = avail;
70cc7f75 1294 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1295
1296 len = XDR_QUADLEN(write->wr_buflen) << 2;
1297 if (len >= avail) {
1298 int pages;
1299
1300 len -= avail;
1301
1302 pages = len >> PAGE_SHIFT;
1303 argp->pagelist += pages;
1304 argp->pagelen -= pages * PAGE_SIZE;
1305 len -= pages * PAGE_SIZE;
1306
fc788f64 1307 next_decode_page(argp);
1da177e4 1308 }
5a80a54d 1309 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1310
1311 DECODE_TAIL;
1312}
1313
b37ad28b 1314static __be32
1da177e4
LT		 1315nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1316{
1317 DECODE_HEAD;
1318
e1a90ebd
AS		 1319 if (argp->minorversion >= 1)
1320 return nfserr_notsupp;
1321
1da177e4
LT		 1322 READ_BUF(12);
1323 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
06553991 1324 rlockowner->rl_owner.len = be32_to_cpup(p++);
1da177e4
LT		 1325 READ_BUF(rlockowner->rl_owner.len);
1326 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1327
60adfc50
AA		 1328 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1329 return nfserr_inval;
1da177e4
LT		 1330 DECODE_TAIL;
1331}
1332
2db134eb
AA		 1333static __be32
1334nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1335 struct nfsd4_exchange_id *exid)
2db134eb 1336{
5afa040b 1337 int dummy, tmp;
0733d213
AA		 1338 DECODE_HEAD;
1339
1340 READ_BUF(NFS4_VERIFIER_SIZE);
1341 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1342
a084daf5
BF		 1343 status = nfsd4_decode_opaque(argp, &exid->clname);
1344 if (status)
1345 return nfserr_bad_xdr;
0733d213
AA		 1346
1347 READ_BUF(4);
06553991 1348 exid->flags = be32_to_cpup(p++);
0733d213
AA		 1349
1350 /* Ignore state_protect4_a */
1351 READ_BUF(4);
06553991 1352 exid->spa_how = be32_to_cpup(p++);
0733d213
AA		 1353 switch (exid->spa_how) {
1354 case SP4_NONE:
1355 break;
1356 case SP4_MACH_CRED:
1357 /* spo_must_enforce */
ed941643
AE		 1358 status = nfsd4_decode_bitmap(argp,
1359 exid->spo_must_enforce);
1360 if (status)
1361 goto out;
0733d213 1362 /* spo_must_allow */
ed941643
AE		 1363 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
1364 if (status)
1365 goto out;
0733d213
AA		 1366 break;
1367 case SP4_SSV:
1368 /* ssp_ops */
1369 READ_BUF(4);
06553991 1370 dummy = be32_to_cpup(p++);
0733d213
AA		 1371 READ_BUF(dummy * 4);
1372 p += dummy;
1373
1374 READ_BUF(4);
06553991 1375 dummy = be32_to_cpup(p++);
0733d213
AA		 1376 READ_BUF(dummy * 4);
1377 p += dummy;
1378
1379 /* ssp_hash_algs<> */
1380 READ_BUF(4);
06553991 1381 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1382 while (tmp--) {
1383 READ_BUF(4);
06553991 1384 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1385 READ_BUF(dummy);
1386 p += XDR_QUADLEN(dummy);
1387 }
0733d213
AA		 1388
1389 /* ssp_encr_algs<> */
1390 READ_BUF(4);
06553991 1391 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1392 while (tmp--) {
1393 READ_BUF(4);
06553991 1394 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1395 READ_BUF(dummy);
1396 p += XDR_QUADLEN(dummy);
1397 }
0733d213 1398
5ed96bc5 1399 /* ignore ssp_window and ssp_num_gss_handles: */
0733d213 1400 READ_BUF(8);
0733d213
AA		 1401 break;
1402 default:
1403 goto xdr_error;
1404 }
1405
0733d213 1406 READ_BUF(4); /* nfs_impl_id4 array length */
06553991 1407 dummy = be32_to_cpup(p++);
0733d213
AA		 1408
1409 if (dummy > 1)
1410 goto xdr_error;
1411
1412 if (dummy == 1) {
79123444
BF		 1413 status = nfsd4_decode_opaque(argp, &exid->nii_domain);
1414 if (status)
1415 goto xdr_error;
0733d213
AA		 1416
1417 /* nii_name */
79123444
BF		 1418 status = nfsd4_decode_opaque(argp, &exid->nii_name);
1419 if (status)
1420 goto xdr_error;
0733d213
AA		 1421
1422 /* nii_date */
79123444
BF		 1423 status = nfsd4_decode_time(argp, &exid->nii_time);
1424 if (status)
1425 goto xdr_error;
0733d213
AA		 1426 }
1427 DECODE_TAIL;
2db134eb
AA		 1428}
1429
1430static __be32
1431nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1432 struct nfsd4_create_session *sess)
1433{
ec6b5d7b 1434 DECODE_HEAD;
ec6b5d7b
AA		 1435
1436 READ_BUF(16);
1437 COPYMEM(&sess->clientid, 8);
06553991
BF		 1438 sess->seqid = be32_to_cpup(p++);
1439 sess->flags = be32_to_cpup(p++);
ec6b5d7b
AA		 1440
1441 /* Fore channel attrs */
1442 READ_BUF(28);
b96811cd 1443 p++; /* headerpadsz is always 0 */
06553991
BF		 1444 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1445 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1446 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1447 sess->fore_channel.maxops = be32_to_cpup(p++);
1448 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1449 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1450 if (sess->fore_channel.nr_rdma_attrs == 1) {
1451 READ_BUF(4);
06553991 1452 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1453 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1454 dprintk("Too many fore channel attr bitmaps!\n");
1455 goto xdr_error;
1456 }
1457
1458 /* Back channel attrs */
1459 READ_BUF(28);
b96811cd 1460 p++; /* headerpadsz is always 0 */
06553991
BF		 1461 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1462 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1463 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1464 sess->back_channel.maxops = be32_to_cpup(p++);
1465 sess->back_channel.maxreqs = be32_to_cpup(p++);
1466 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1467 if (sess->back_channel.nr_rdma_attrs == 1) {
1468 READ_BUF(4);
06553991 1469 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1470 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1471 dprintk("Too many back channel attr bitmaps!\n");
1472 goto xdr_error;
1473 }
1474
acb2887e 1475 READ_BUF(4);
06553991 1476 sess->callback_prog = be32_to_cpup(p++);
acb2887e 1477 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1478 DECODE_TAIL;
2db134eb
AA		 1479}
1480
1481static __be32
1482nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1483 struct nfsd4_destroy_session *destroy_session)
1484{
e10e0cfc
BH		 1485 DECODE_HEAD;
1486 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1487 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1488
1489 DECODE_TAIL;
2db134eb
AA		 1490}
1491
e1ca12df
BS		 1492static __be32
1493nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1494 struct nfsd4_free_stateid *free_stateid)
1495{
1496 DECODE_HEAD;
1497
1498 READ_BUF(sizeof(stateid_t));
06553991 1499 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
e1ca12df
BS		 1500 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1501
1502 DECODE_TAIL;
1503}
1504
2db134eb
AA		 1505static __be32
1506nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1507 struct nfsd4_sequence *seq)
1508{
b85d4c01
BH		 1509 DECODE_HEAD;
1510
1511 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1512 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991
BF		 1513 seq->seqid = be32_to_cpup(p++);
1514 seq->slotid = be32_to_cpup(p++);
1515 seq->maxslots = be32_to_cpup(p++);
1516 seq->cachethis = be32_to_cpup(p++);
b85d4c01
BH		 1517
1518 DECODE_TAIL;
2db134eb
AA		 1519}
1520
17456804
BS		 1521static __be32
1522nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1523{
17456804 1524 int i;
03cfb420
BS		 1525 __be32 *p, status;
1526 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1527
1528 READ_BUF(4);
1529 test_stateid->ts_num_ids = ntohl(*p++);
1530
03cfb420 1531 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1532
1533 for (i = 0; i < test_stateid->ts_num_ids; i++) {
d5e23383 1534 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
03cfb420 1535 if (!stateid) {
afcf6792 1536 status = nfserrno(-ENOMEM);
03cfb420
BS		 1537 goto out;
1538 }
1539
03cfb420
BS		 1540 INIT_LIST_HEAD(&stateid->ts_id_list);
1541 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1542
1543 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1544 if (status)
03cfb420 1545 goto out;
17456804
BS		 1546 }
1547
1548 status = 0;
1549out:
1550 return status;
1551xdr_error:
1552 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1553 status = nfserr_bad_xdr;
1554 goto out;
1555}
1556
345c2842
MJ		 1557static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1558{
1559 DECODE_HEAD;
1560
1561 READ_BUF(8);
1562 COPYMEM(&dc->clientid, 8);
1563
1564 DECODE_TAIL;
1565}
1566
4dc6ec00
BF		 1567static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1568{
1569 DECODE_HEAD;
1570
1571 READ_BUF(4);
06553991 1572 rc->rca_one_fs = be32_to_cpup(p++);
4dc6ec00
BF		 1573
1574 DECODE_TAIL;
1575}
1576
9cf514cc
CH		 1577#ifdef CONFIG_NFSD_PNFS
1578static __be32
1579nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1580 struct nfsd4_getdeviceinfo *gdev)
1581{
1582 DECODE_HEAD;
1583 u32 num, i;
1584
1585 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1586 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1587 gdev->gd_layout_type = be32_to_cpup(p++);
1588 gdev->gd_maxcount = be32_to_cpup(p++);
1589 num = be32_to_cpup(p++);
1590 if (num) {
3171822f
SM		 1591 if (num > 1000)
1592 goto xdr_error;
9cf514cc
CH		 1593 READ_BUF(4 * num);
1594 gdev->gd_notify_types = be32_to_cpup(p++);
1595 for (i = 1; i < num; i++) {
1596 if (be32_to_cpup(p++)) {
1597 status = nfserr_inval;
1598 goto out;
1599 }
1600 }
1601 }
1602 DECODE_TAIL;
1603}
1604
1605static __be32
1606nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1607 struct nfsd4_layoutget *lgp)
1608{
1609 DECODE_HEAD;
1610
1611 READ_BUF(36);
1612 lgp->lg_signal = be32_to_cpup(p++);
1613 lgp->lg_layout_type = be32_to_cpup(p++);
1614 lgp->lg_seg.iomode = be32_to_cpup(p++);
1615 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1616 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1617 p = xdr_decode_hyper(p, &lgp->lg_minlength);
db59c0ef
KM		 1618
1619 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1620 if (status)
1621 return status;
1622
9cf514cc
CH		 1623 READ_BUF(4);
1624 lgp->lg_maxcount = be32_to_cpup(p++);
1625
1626 DECODE_TAIL;
1627}
1628
1629static __be32
1630nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1631 struct nfsd4_layoutcommit *lcp)
1632{
1633 DECODE_HEAD;
1634 u32 timechange;
1635
1636 READ_BUF(20);
1637 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1638 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1639 lcp->lc_reclaim = be32_to_cpup(p++);
db59c0ef
KM		 1640
1641 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1642 if (status)
1643 return status;
1644
9cf514cc
CH		 1645 READ_BUF(4);
1646 lcp->lc_newoffset = be32_to_cpup(p++);
1647 if (lcp->lc_newoffset) {
1648 READ_BUF(8);
1649 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1650 } else
1651 lcp->lc_last_wr = 0;
1652 READ_BUF(4);
1653 timechange = be32_to_cpup(p++);
1654 if (timechange) {
1655 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1656 if (status)
1657 return status;
1658 } else {
1659 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1660 }
1661 READ_BUF(8);
1662 lcp->lc_layout_type = be32_to_cpup(p++);
1663
1664 /*
1665 * Save the layout update in XDR format and let the layout driver deal
1666 * with it later.
1667 */
1668 lcp->lc_up_len = be32_to_cpup(p++);
1669 if (lcp->lc_up_len > 0) {
1670 READ_BUF(lcp->lc_up_len);
1671 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1672 }
1673
1674 DECODE_TAIL;
1675}
1676
1677static __be32
1678nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1679 struct nfsd4_layoutreturn *lrp)
1680{
1681 DECODE_HEAD;
1682
1683 READ_BUF(16);
1684 lrp->lr_reclaim = be32_to_cpup(p++);
1685 lrp->lr_layout_type = be32_to_cpup(p++);
1686 lrp->lr_seg.iomode = be32_to_cpup(p++);
1687 lrp->lr_return_type = be32_to_cpup(p++);
1688 if (lrp->lr_return_type == RETURN_FILE) {
1689 READ_BUF(16);
1690 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1691 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
db59c0ef
KM		 1692
1693 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1694 if (status)
1695 return status;
1696
9cf514cc
CH		 1697 READ_BUF(4);
1698 lrp->lrf_body_len = be32_to_cpup(p++);
1699 if (lrp->lrf_body_len > 0) {
1700 READ_BUF(lrp->lrf_body_len);
1701 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1702 }
1703 } else {
1704 lrp->lr_seg.offset = 0;
1705 lrp->lr_seg.length = NFS4_MAX_UINT64;
1706 }
1707
1708 DECODE_TAIL;
1709}
1710#endif /* CONFIG_NFSD_PNFS */
1711
95d871f0
AS		 1712static __be32
1713nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1714 struct nfsd4_fallocate *fallocate)
1715{
1716 DECODE_HEAD;
1717
1718 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1719 if (status)
1720 return status;
1721
1722 READ_BUF(16);
1723 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1724 xdr_decode_hyper(p, &fallocate->falloc_length);
1725
1726 DECODE_TAIL;
1727}
1728
ffa0160a
CH		 1729static __be32
1730nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1731{
1732 DECODE_HEAD;
1733
1734 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1735 if (status)
1736 return status;
1737 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1738 if (status)
1739 return status;
1740
1741 READ_BUF(8 + 8 + 8);
1742 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1743 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1744 p = xdr_decode_hyper(p, &clone->cl_count);
1745 DECODE_TAIL;
1746}
1747
84e1b21d
OK		 1748static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
1749 struct nl4_server *ns)
1750{
1751 DECODE_HEAD;
1752 struct nfs42_netaddr *naddr;
1753
1754 READ_BUF(4);
1755 ns->nl4_type = be32_to_cpup(p++);
1756
1757 /* currently support for 1 inter-server source server */
1758 switch (ns->nl4_type) {
1759 case NL4_NETADDR:
1760 naddr = &ns->u.nl4_addr;
1761
1762 READ_BUF(4);
1763 naddr->netid_len = be32_to_cpup(p++);
1764 if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
1765 goto xdr_error;
1766
1767 READ_BUF(naddr->netid_len + 4); /* 4 for uaddr len */
1768 COPYMEM(naddr->netid, naddr->netid_len);
1769
1770 naddr->addr_len = be32_to_cpup(p++);
1771 if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
1772 goto xdr_error;
1773
1774 READ_BUF(naddr->addr_len);
1775 COPYMEM(naddr->addr, naddr->addr_len);
1776 break;
1777 default:
1778 goto xdr_error;
1779 }
1780 DECODE_TAIL;
1781}
1782
29ae7f9d
AS		 1783static __be32
1784nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1785{
1786 DECODE_HEAD;
84e1b21d
OK		 1787 struct nl4_server *ns_dummy;
1788 int i, count;
29ae7f9d
AS		 1789
1790 status = nfsd4_decode_stateid(argp, &copy->cp_src_stateid);
1791 if (status)
1792 return status;
1793 status = nfsd4_decode_stateid(argp, &copy->cp_dst_stateid);
1794 if (status)
1795 return status;
1796
1797 READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
1798 p = xdr_decode_hyper(p, &copy->cp_src_pos);
1799 p = xdr_decode_hyper(p, &copy->cp_dst_pos);
1800 p = xdr_decode_hyper(p, &copy->cp_count);
edcc8452 1801 p++; /* ca_consecutive: we always do consecutive copies */
29ae7f9d 1802 copy->cp_synchronous = be32_to_cpup(p++);
84e1b21d
OK		 1803
1804 count = be32_to_cpup(p++);
1805
1806 copy->cp_intra = false;
1807 if (count == 0) { /* intra-server copy */
1808 copy->cp_intra = true;
1809 goto intra;
1810 }
1811
1812 /* decode all the supplied server addresses but use first */
1813 status = nfsd4_decode_nl4_server(argp, &copy->cp_src);
1814 if (status)
1815 return status;
1816
1817 ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
1818 if (ns_dummy == NULL)
1819 return nfserrno(-ENOMEM);
1820 for (i = 0; i < count - 1; i++) {
1821 status = nfsd4_decode_nl4_server(argp, ns_dummy);
1822 if (status) {
1823 kfree(ns_dummy);
1824 return status;
1825 }
1826 }
1827 kfree(ns_dummy);
1828intra:
29ae7f9d
AS		 1829
1830 DECODE_TAIL;
1831}
1832
6308bc98
OK		 1833static __be32
1834nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
1835 struct nfsd4_offload_status *os)
1836{
1837 return nfsd4_decode_stateid(argp, &os->stateid);
1838}
1839
51911868
OK		 1840static __be32
1841nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
1842 struct nfsd4_copy_notify *cn)
1843{
1844 int status;
1845
1846 status = nfsd4_decode_stateid(argp, &cn->cpn_src_stateid);
1847 if (status)
1848 return status;
1849 return nfsd4_decode_nl4_server(argp, &cn->cpn_dst);
1850}
1851
24bab491
AS		 1852static __be32
1853nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1854{
1855 DECODE_HEAD;
1856
1857 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1858 if (status)
1859 return status;
1860
1861 READ_BUF(8 + 4);
1862 p = xdr_decode_hyper(p, &seek->seek_offset);
1863 seek->seek_whence = be32_to_cpup(p);
1864
1865 DECODE_TAIL;
1866}
1867
347e0ad9
BH		 1868static __be32
1869nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1870{
1871 return nfs_ok;
1872}
1873
3c375c6f
BH		 1874static __be32
1875nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1876{
1e685ec2 1877 return nfserr_notsupp;
3c375c6f
BH		 1878}
1879
347e0ad9
BH		 1880typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1881
c1df609d 1882static const nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1883 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1884 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1885 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1886 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1887 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1888 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1889 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1890 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1891 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1892 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1893 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1894 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1895 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1896 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1897 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1898 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1899 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1900 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1901 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1902 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1903 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1904 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1905 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1906 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1907 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1908 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1909 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1910 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1911 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1912 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1913 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1914 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1915 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1916 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1917 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1918 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1919 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1920
1921 /* new operations for NFSv4.1 */
cb73a9f4 1922 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1923 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1924 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1925 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1926 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1927 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae 1928 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc
CH		 1929#ifdef CONFIG_NFSD_PNFS
1930 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1931 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1932 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1933 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1934 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1935#else
9064caae
RD		 1936 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1937 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1938 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1939 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1940 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc 1941#endif
04f4ad16 1942 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1943 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1944 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1945 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1946 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1947 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1948 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
87a15a80
AS		 1949
1950 /* new operations for NFSv4.2 */
95d871f0 1951 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
29ae7f9d 1952 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
51911868 1953 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_copy_notify,
b0cb9085 1954 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
87a15a80
AS		 1955 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1956 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1957 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
885e2bf3 1958 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status,
6308bc98 1959 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status,
87a15a80 1960 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
24bab491 1961 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
87a15a80 1962 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
ffa0160a 1963 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
2db134eb
AA		 1964};
1965
e1a90ebd
AS		 1966static inline bool
1967nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1968{
8217d146 1969 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1970 return false;
8217d146 1971 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1972 return false;
8217d146
AS		 1973 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1974 return false;
1975 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1976 return false;
1977 return true;
1978}
f2feb96b 1979
b37ad28b 1980static __be32
1da177e4
LT		 1981nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1982{
1983 DECODE_HEAD;
1984 struct nfsd4_op *op;
1091006c 1985 bool cachethis = false;
a5cddc88
BF		 1986 int auth_slack= argp->rqstp->rq_auth_slack;
1987 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 1988 int readcount = 0;
1989 int readbytes = 0;
1da177e4
LT		 1990 int i;
1991
1da177e4 1992 READ_BUF(4);
06553991 1993 argp->taglen = be32_to_cpup(p++);
4aed9c46 1994 READ_BUF(argp->taglen);
1da177e4 1995 SAVEMEM(argp->tag, argp->taglen);
4aed9c46 1996 READ_BUF(8);
06553991
BF		 1997 argp->minorversion = be32_to_cpup(p++);
1998 argp->opcnt = be32_to_cpup(p++);
4f0cefbf 1999 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 2000
2001 if (argp->taglen > NFSD4_MAX_TAGLEN)
2002 goto xdr_error;
0078117c
BF		 2003 /*
2004 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
2005 * here, so we return success at the xdr level so that
2006 * nfsd4_proc can handle this is an NFS-level error.
2007 */
2008 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
2009 return 0;
1da177e4 2010
e8c96f8c 2011 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
5d6031ca 2012 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1da177e4
LT		 2013 if (!argp->ops) {
2014 argp->ops = argp->iops;
817cb9d4 2015 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 2016 goto xdr_error;
2017 }
2018 }
2019
e1a90ebd 2020 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 2021 argp->opcnt = 0;
2022
1da177e4
LT		 2023 for (i = 0; i < argp->opcnt; i++) {
2024 op = &argp->ops[i];
2025 op->replay = NULL;
2026
8a61b18c 2027 READ_BUF(4);
06553991 2028 op->opnum = be32_to_cpup(p++);
1da177e4 2029
e1a90ebd
AS		 2030 if (nfsd4_opnum_in_range(argp, op))
2031 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 2032 else {
1da177e4
LT		 2033 op->opnum = OP_ILLEGAL;
2034 op->status = nfserr_op_illegal;
1da177e4 2035 }
f4f9ef4a 2036 op->opdesc = OPDESC(op);
1091006c
BF		 2037 /*
2038 * We'll try to cache the result in the DRC if any one
2039 * op in the compound wants to be cached:
2040 */
2041 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 2042
b0e35fda
BF		 2043 if (op->opnum == OP_READ) {
2044 readcount++;
2045 readbytes += nfsd4_max_reply(argp->rqstp, op);
2046 } else
2047 max_reply += nfsd4_max_reply(argp->rqstp, op);
f7b43d0c 2048 /*
7323f0d2
KM		 2049 * OP_LOCK and OP_LOCKT may return a conflicting lock.
2050 * (Special case because it will just skip encoding this
2051 * if it runs out of xdr buffer space, and it is the only
2052 * operation that behaves this way.)
f7b43d0c 2053 */
7323f0d2 2054 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
f7b43d0c 2055 max_reply += NFS4_OPAQUE_LIMIT;
e372ba60
BF		 2056
2057 if (op->status) {
2058 argp->opcnt = i+1;
2059 break;
2060 }
1da177e4 2061 }
1091006c
BF		 2062 /* Sessions make the DRC unnecessary: */
2063 if (argp->minorversion)
2064 cachethis = false;
b0e35fda 2065 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 2066 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 2067
a5cddc88 2068 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
779fb0f3 2069 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
b0e35fda 2070
1da177e4
LT		 2071 DECODE_TAIL;
2072}
1da177e4 2073
b8800921
N		 2074static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
2075 struct svc_export *exp)
c654b8a9 2076{
b8800921
N		 2077 if (exp->ex_flags & NFSEXP_V4ROOT) {
2078 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
2079 *p++ = 0;
2080 } else if (IS_I_VERSION(inode)) {
39ca1bf6 2081 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
c654b8a9 2082 } else {
d05d5744
BF		 2083 *p++ = cpu_to_be32(stat->ctime.tv_sec);
2084 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
c654b8a9 2085 }
d05d5744 2086 return p;
c654b8a9
BF		 2087}
2088
16945141
BF		 2089/*
2090 * ctime (in NFSv4, time_metadata) is not writeable, and the client
2091 * doesn't really care what resolution could theoretically be stored by
2092 * the filesystem.
2093 *
2094 * The client cares how close together changes can be while still
2095 * guaranteeing ctime changes. For most filesystems (which have
2096 * timestamps with nanosecond fields) that is limited by the resolution
2097 * of the time returned from current_time() (which I'm assuming to be
2098 * 1/HZ).
2099 */
2100static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
2101{
2102 struct timespec ts;
2103 u32 ns;
2104
2105 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
2106 ts = ns_to_timespec(ns);
2107
2108 p = xdr_encode_hyper(p, ts.tv_sec);
2109 *p++ = cpu_to_be32(ts.tv_nsec);
2110
2111 return p;
2112}
2113
d05d5744 2114static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 2115{
d05d5744 2116 *p++ = cpu_to_be32(c->atomic);
c654b8a9 2117 if (c->change_supported) {
d05d5744
BF		 2118 p = xdr_encode_hyper(p, c->before_change);
2119 p = xdr_encode_hyper(p, c->after_change);
c654b8a9 2120 } else {
d05d5744
BF		 2121 *p++ = cpu_to_be32(c->before_ctime_sec);
2122 *p++ = cpu_to_be32(c->before_ctime_nsec);
2123 *p++ = cpu_to_be32(c->after_ctime_sec);
2124 *p++ = cpu_to_be32(c->after_ctime_nsec);
c654b8a9 2125 }
d05d5744 2126 return p;
c654b8a9 2127}
1da177e4 2128
81c3f413 2129/* Encode as an array of strings the string given with components
e7a0444a 2130 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 2131 */
ddd1ea56
BF		 2132static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2133 char *components, char esc_enter,
2134 char esc_exit)
81c3f413 2135{
ddd1ea56 2136 __be32 *p;
082d4bd7
BF		 2137 __be32 pathlen;
2138 int pathlen_offset;
81c3f413 2139 int strlen, count=0;
e7a0444a 2140 char *str, *end, *next;
81c3f413
BF		 2141
2142 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 2143
2144 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 2145 p = xdr_reserve_space(xdr, 4);
2146 if (!p)
81c3f413 2147 return nfserr_resource;
082d4bd7
BF		 2148 p++; /* We will fill this in with @count later */
2149
81c3f413
BF		 2150 end = str = components;
2151 while (*end) {
e7a0444a
WAA		 2152 bool found_esc = false;
2153
2154 /* try to parse as esc_start, ..., esc_end, sep */
2155 if (*str == esc_enter) {
2156 for (; *end && (*end != esc_exit); end++)
2157 /* find esc_exit or end of string */;
2158 next = end + 1;
2159 if (*end && (!*next || *next == sep)) {
2160 str++;
2161 found_esc = true;
2162 }
2163 }
2164
2165 if (!found_esc)
2166 for (; *end && (*end != sep); end++)
2167 /* find sep or end of string */;
2168
81c3f413
BF		 2169 strlen = end - str;
2170 if (strlen) {
ddd1ea56
BF		 2171 p = xdr_reserve_space(xdr, strlen + 4);
2172 if (!p)
81c3f413 2173 return nfserr_resource;
0c0c267b 2174 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 2175 count++;
2176 }
2177 else
2178 end++;
5a64e569
BC		 2179 if (found_esc)
2180 end = next;
2181
81c3f413
BF		 2182 str = end;
2183 }
bf7491f1 2184 pathlen = htonl(count);
082d4bd7 2185 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 2186 return 0;
2187}
2188
e7a0444a
WAA		 2189/* Encode as an array of strings the string given with components
2190 * separated @sep.
2191 */
ddd1ea56
BF		 2192static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2193 char *components)
e7a0444a 2194{
ddd1ea56 2195 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 2196}
2197
81c3f413
BF		 2198/*
2199 * encode a location element of a fs_locations structure
2200 */
ddd1ea56
BF		 2201static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2202 struct nfsd4_fs_location *location)
81c3f413 2203{
b37ad28b 2204 __be32 status;
81c3f413 2205
ddd1ea56 2206 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 2207 '[', ']');
81c3f413
BF		 2208 if (status)
2209 return status;
ddd1ea56 2210 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 2211 if (status)
2212 return status;
81c3f413
BF		 2213 return 0;
2214}
2215
2216/*
ed748aac 2217 * Encode a path in RFC3530 'pathname4' format
81c3f413 2218 */
ddd1ea56
BF		 2219static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2220 const struct path *root,
2221 const struct path *path)
81c3f413 2222{
301f0268 2223 struct path cur = *path;
ddd1ea56 2224 __be32 *p;
ed748aac
TM		 2225 struct dentry **components = NULL;
2226 unsigned int ncomponents = 0;
2227 __be32 err = nfserr_jukebox;
81c3f413 2228
ed748aac 2229 dprintk("nfsd4_encode_components(");
81c3f413 2230
ed748aac
TM		 2231 path_get(&cur);
2232 /* First walk the path up to the nfsd root, and store the
2233 * dentries/path components in an array.
2234 */
2235 for (;;) {
b77a4b2e 2236 if (path_equal(&cur, root))
ed748aac
TM		 2237 break;
2238 if (cur.dentry == cur.mnt->mnt_root) {
2239 if (follow_up(&cur))
2240 continue;
2241 goto out_free;
2242 }
2243 if ((ncomponents & 15) == 0) {
2244 struct dentry **new;
2245 new = krealloc(components,
2246 sizeof(*new) * (ncomponents + 16),
2247 GFP_KERNEL);
2248 if (!new)
2249 goto out_free;
2250 components = new;
2251 }
2252 components[ncomponents++] = cur.dentry;
2253 cur.dentry = dget_parent(cur.dentry);
2254 }
ddd1ea56
BF		 2255 err = nfserr_resource;
2256 p = xdr_reserve_space(xdr, 4);
2257 if (!p)
ed748aac 2258 goto out_free;
c373b0a4 2259 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 2260
2261 while (ncomponents) {
2262 struct dentry *dentry = components[ncomponents - 1];
301f0268 2263 unsigned int len;
ed748aac 2264
301f0268
AV		 2265 spin_lock(&dentry->d_lock);
2266 len = dentry->d_name.len;
ddd1ea56
BF		 2267 p = xdr_reserve_space(xdr, len + 4);
2268 if (!p) {
301f0268 2269 spin_unlock(&dentry->d_lock);
ed748aac 2270 goto out_free;
301f0268 2271 }
0c0c267b 2272 p = xdr_encode_opaque(p, dentry->d_name.name, len);
a455589f 2273 dprintk("/%pd", dentry);
301f0268 2274 spin_unlock(&dentry->d_lock);
ed748aac
TM		 2275 dput(dentry);
2276 ncomponents--;
81c3f413 2277 }
ed748aac 2278
ed748aac
TM		 2279 err = 0;
2280out_free:
2281 dprintk(")\n");
2282 while (ncomponents)
2283 dput(components[--ncomponents]);
2284 kfree(components);
2285 path_put(&cur);
2286 return err;
2287}
2288
ddd1ea56
BF		 2289static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2290 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 2291{
2292 struct svc_export *exp_ps;
2293 __be32 res;
2294
2295 exp_ps = rqst_find_fsidzero_export(rqstp);
2296 if (IS_ERR(exp_ps))
2297 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 2298 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 2299 exp_put(exp_ps);
2300 return res;
81c3f413
BF		 2301}
2302
2303/*
2304 * encode a fs_locations structure
2305 */
ddd1ea56
BF		 2306static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2307 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 2308{
b37ad28b 2309 __be32 status;
cc45f017 2310 int i;
ddd1ea56 2311 __be32 *p;
81c3f413 2312 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 2313
ddd1ea56 2314 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 2315 if (status)
2316 return status;
ddd1ea56
BF		 2317 p = xdr_reserve_space(xdr, 4);
2318 if (!p)
81c3f413 2319 return nfserr_resource;
c373b0a4 2320 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 2321 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 2322 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 2323 if (status)
2324 return status;
2325 }
81c3f413
BF		 2326 return 0;
2327}
1da177e4 2328
3d2544b1
BF		 2329static u32 nfs4_file_type(umode_t mode)
2330{
2331 switch (mode & S_IFMT) {
2332 case S_IFIFO: return NF4FIFO;
2333 case S_IFCHR: return NF4CHR;
2334 case S_IFDIR: return NF4DIR;
2335 case S_IFBLK: return NF4BLK;
2336 case S_IFLNK: return NF4LNK;
2337 case S_IFREG: return NF4REG;
2338 case S_IFSOCK: return NF4SOCK;
2339 default: return NF4BAD;
2340 };
2341}
1da177e4 2342
b37ad28b 2343static inline __be32
ddd1ea56
BF		 2344nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2345 struct nfs4_ace *ace)
1da177e4 2346{
3554116d 2347 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 2348 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 2349 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 2350 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 2351 else
ddd1ea56 2352 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 2353}
2354
6896f15a 2355static inline __be32
8a4c3926 2356nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
6896f15a 2357{
8a4c3926
JL		 2358 __be32 *p;
2359 unsigned long i = hweight_long(layout_types);
6896f15a 2360
8a4c3926
JL		 2361 p = xdr_reserve_space(xdr, 4 + 4 * i);
2362 if (!p)
2363 return nfserr_resource;
2364
2365 *p++ = cpu_to_be32(i);
2366
2367 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2368 if (layout_types & (1 << i))
2369 *p++ = cpu_to_be32(i);
6896f15a
KM		 2370
2371 return 0;
2372}
2373
42ca0993
BF		 2374#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2375 FATTR4_WORD0_RDATTR_ERROR)
2376#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
c2227a39 2377#define WORD2_ABSENT_FS_ATTRS 0
42ca0993 2378
18032ca0
DQ		 2379#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2380static inline __be32
ddd1ea56
BF		 2381nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2382 void *context, int len)
18032ca0 2383{
ddd1ea56 2384 __be32 *p;
18032ca0 2385
ddd1ea56
BF		 2386 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2387 if (!p)
18032ca0
DQ		 2388 return nfserr_resource;
2389
2390 /*
2391 * For now we use a 0 here to indicate the null translation; in
2392 * the future we may place a call to translation code here.
2393 */
c373b0a4
BF		 2394 *p++ = cpu_to_be32(0); /* lfs */
2395 *p++ = cpu_to_be32(0); /* pi */
18032ca0 2396 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 2397 return 0;
2398}
2399#else
2400static inline __be32
ddd1ea56
BF		 2401nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2402 void *context, int len)
18032ca0
DQ		 2403{ return 0; }
2404#endif
2405
c2227a39 2406static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
42ca0993
BF		 2407{
2408 /* As per referral draft: */
2409 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2410 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2411 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2412 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2413 *rdattr_err = NFSERR_MOVED;
2414 else
2415 return nfserr_moved;
2416 }
2417 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2418 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
c2227a39 2419 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
42ca0993
BF		 2420 return 0;
2421}
1da177e4 2422
ae7095a7
BF		 2423
2424static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2425{
2426 struct path path = exp->ex_path;
2427 int err;
2428
2429 path_get(&path);
2430 while (follow_up(&path)) {
2431 if (path.dentry != path.mnt->mnt_root)
2432 break;
2433 }
a528d35e 2434 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
ae7095a7
BF		 2435 path_put(&path);
2436 return err;
2437}
2438
75976de6
KM		 2439static __be32
2440nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2441{
2442 __be32 *p;
2443
2444 if (bmval2) {
2445 p = xdr_reserve_space(xdr, 16);
2446 if (!p)
2447 goto out_resource;
2448 *p++ = cpu_to_be32(3);
2449 *p++ = cpu_to_be32(bmval0);
2450 *p++ = cpu_to_be32(bmval1);
2451 *p++ = cpu_to_be32(bmval2);
2452 } else if (bmval1) {
2453 p = xdr_reserve_space(xdr, 12);
2454 if (!p)
2455 goto out_resource;
2456 *p++ = cpu_to_be32(2);
2457 *p++ = cpu_to_be32(bmval0);
2458 *p++ = cpu_to_be32(bmval1);
2459 } else {
2460 p = xdr_reserve_space(xdr, 8);
2461 if (!p)
2462 goto out_resource;
2463 *p++ = cpu_to_be32(1);
2464 *p++ = cpu_to_be32(bmval0);
2465 }
2466
2467 return 0;
2468out_resource:
2469 return nfserr_resource;
2470}
2471
1da177e4
LT		 2472/*
2473 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2474 * ourselves.
1da177e4 2475 */
da2ebce6 2476static __be32
d5184658
BF		 2477nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2478 struct svc_export *exp,
2479 struct dentry *dentry, u32 *bmval,
406a7ea9 2480 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2481{
2482 u32 bmval0 = bmval[0];
2483 u32 bmval1 = bmval[1];
7e705706 2484 u32 bmval2 = bmval[2];
1da177e4 2485 struct kstat stat;
d50e6136 2486 struct svc_fh *tempfh = NULL;
1da177e4 2487 struct kstatfs statfs;
ddd1ea56 2488 __be32 *p;
1fcea5b2 2489 int starting_len = xdr->buf->len;
082d4bd7
BF		 2490 int attrlen_offset;
2491 __be32 attrlen;
1da177e4
LT		 2492 u32 dummy;
2493 u64 dummy64;
42ca0993 2494 u32 rdattr_err = 0;
b37ad28b 2495 __be32 status;
b8dd7b9a 2496 int err;
1da177e4 2497 struct nfs4_acl *acl = NULL;
0ab88ca4 2498#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2499 void *context = NULL;
2500 int contextlen;
0ab88ca4 2501#endif
18032ca0 2502 bool contextsupport = false;
7e705706
AA		 2503 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2504 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2505 struct path path = {
2506 .mnt = exp->ex_path.mnt,
2507 .dentry = dentry,
2508 };
3d733711 2509 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2510
2511 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
916d2d84 2512 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
1da177e4 2513
42ca0993 2514 if (exp->ex_fslocs.migrated) {
c2227a39 2515 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
42ca0993
BF		 2516 if (status)
2517 goto out;
2518 }
2519
a528d35e 2520 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
b8dd7b9a 2521 if (err)
1da177e4 2522 goto out_nfserr;
12337901
CH		 2523 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2524 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2525 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2526 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2527 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2528 if (err)
1da177e4
LT		 2529 goto out_nfserr;
2530 }
2531 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2532 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2533 status = nfserr_jukebox;
2534 if (!tempfh)
2535 goto out;
2536 fh_init(tempfh, NFS4_FHSIZE);
2537 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2538 if (status)
2539 goto out;
d50e6136 2540 fhp = tempfh;
1da177e4 2541 }
0c9d65e7 2542 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2543 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
0c9d65e7
AG		 2544 if (err == -EOPNOTSUPP)
2545 bmval0 &= ~FATTR4_WORD0_ACL;
2546 else if (err == -EINVAL) {
2547 status = nfserr_attrnotsupp;
2548 goto out;
2549 } else if (err != 0)
2550 goto out_nfserr;
1da177e4 2551 }
1da177e4 2552
18032ca0 2553#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
c2227a39
KM		 2554 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2555 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
32ddd944
BF		 2556 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2557 err = security_inode_getsecctx(d_inode(dentry),
18032ca0 2558 &context, &contextlen);
32ddd944
BF		 2559 else
2560 err = -EOPNOTSUPP;
18032ca0
DQ		 2561 contextsupport = (err == 0);
2562 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2563 if (err == -EOPNOTSUPP)
2564 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2565 else if (err)
2566 goto out_nfserr;
2567 }
2568 }
2569#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2570
75976de6
KM		 2571 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2572 if (status)
2573 goto out;
082d4bd7
BF		 2574
2575 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2576 p = xdr_reserve_space(xdr, 4);
2577 if (!p)
2578 goto out_resource;
082d4bd7 2579 p++; /* to be backfilled later */
1da177e4
LT		 2580
2581 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
dcd20869
BF		 2582 u32 supp[3];
2583
2584 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
7e705706 2585
0c9d65e7 2586 if (!IS_POSIXACL(dentry->d_inode))
916d2d84 2587 supp[0] &= ~FATTR4_WORD0_ACL;
18032ca0 2588 if (!contextsupport)
916d2d84
BF		 2589 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2590 if (!supp[2]) {
ddd1ea56
BF		 2591 p = xdr_reserve_space(xdr, 12);
2592 if (!p)
2b44f1ba 2593 goto out_resource;
c373b0a4 2594 *p++ = cpu_to_be32(2);
916d2d84
BF		 2595 *p++ = cpu_to_be32(supp[0]);
2596 *p++ = cpu_to_be32(supp[1]);
7e705706 2597 } else {
ddd1ea56
BF		 2598 p = xdr_reserve_space(xdr, 16);
2599 if (!p)
2b44f1ba 2600 goto out_resource;
c373b0a4 2601 *p++ = cpu_to_be32(3);
916d2d84
BF		 2602 *p++ = cpu_to_be32(supp[0]);
2603 *p++ = cpu_to_be32(supp[1]);
2604 *p++ = cpu_to_be32(supp[2]);
7e705706 2605 }
1da177e4
LT		 2606 }
2607 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2608 p = xdr_reserve_space(xdr, 4);
2609 if (!p)
1da177e4 2610 goto out_resource;
3d2544b1 2611 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2612 if (dummy == NF4BAD) {
2613 status = nfserr_serverfault;
2614 goto out;
2615 }
c373b0a4 2616 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2617 }
2618 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2619 p = xdr_reserve_space(xdr, 4);
2620 if (!p)
1da177e4 2621 goto out_resource;
49640001 2622 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2623 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2624 else
c373b0a4
BF		 2625 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2626 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2627 }
2628 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2629 p = xdr_reserve_space(xdr, 8);
2630 if (!p)
1da177e4 2631 goto out_resource;
b8800921 2632 p = encode_change(p, &stat, d_inode(dentry), exp);
1da177e4
LT		 2633 }
2634 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2635 p = xdr_reserve_space(xdr, 8);
2636 if (!p)
1da177e4 2637 goto out_resource;
b64c7f3b 2638 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2639 }
2640 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2641 p = xdr_reserve_space(xdr, 4);
2642 if (!p)
1da177e4 2643 goto out_resource;
c373b0a4 2644 *p++ = cpu_to_be32(1);
1da177e4
LT		 2645 }
2646 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2647 p = xdr_reserve_space(xdr, 4);
2648 if (!p)
1da177e4 2649 goto out_resource;
c373b0a4 2650 *p++ = cpu_to_be32(1);
1da177e4
LT		 2651 }
2652 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2653 p = xdr_reserve_space(xdr, 4);
2654 if (!p)
1da177e4 2655 goto out_resource;
c373b0a4 2656 *p++ = cpu_to_be32(0);
1da177e4
LT		 2657 }
2658 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2659 p = xdr_reserve_space(xdr, 16);
2660 if (!p)
1da177e4 2661 goto out_resource;
42ca0993 2662 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 2663 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2664 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2665 } else switch(fsid_source(fhp)) {
2666 case FSIDSOURCE_FSID:
b64c7f3b
BF		 2667 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2668 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 2669 break;
2670 case FSIDSOURCE_DEV:
c373b0a4
BF		 2671 *p++ = cpu_to_be32(0);
2672 *p++ = cpu_to_be32(MAJOR(stat.dev));
2673 *p++ = cpu_to_be32(0);
2674 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 2675 break;
2676 case FSIDSOURCE_UUID:
94eb3689
KM		 2677 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2678 EX_UUID_LEN);
af6a4e28 2679 break;
1da177e4
LT		 2680 }
2681 }
2682 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2683 p = xdr_reserve_space(xdr, 4);
2684 if (!p)
1da177e4 2685 goto out_resource;
c373b0a4 2686 *p++ = cpu_to_be32(0);
1da177e4
LT		 2687 }
2688 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2689 p = xdr_reserve_space(xdr, 4);
2690 if (!p)
1da177e4 2691 goto out_resource;
c373b0a4 2692 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 2693 }
2694 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2695 p = xdr_reserve_space(xdr, 4);
2696 if (!p)
1da177e4 2697 goto out_resource;
c373b0a4 2698 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 2699 }
2700 if (bmval0 & FATTR4_WORD0_ACL) {
2701 struct nfs4_ace *ace;
1da177e4
LT		 2702
2703 if (acl == NULL) {
ddd1ea56
BF		 2704 p = xdr_reserve_space(xdr, 4);
2705 if (!p)
1da177e4
LT		 2706 goto out_resource;
2707
c373b0a4 2708 *p++ = cpu_to_be32(0);
1da177e4
LT		 2709 goto out_acl;
2710 }
ddd1ea56
BF		 2711 p = xdr_reserve_space(xdr, 4);
2712 if (!p)
1da177e4 2713 goto out_resource;
c373b0a4 2714 *p++ = cpu_to_be32(acl->naces);
1da177e4 2715
28e05dd8 2716 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2717 p = xdr_reserve_space(xdr, 4*3);
2718 if (!p)
1da177e4 2719 goto out_resource;
c373b0a4
BF		 2720 *p++ = cpu_to_be32(ace->type);
2721 *p++ = cpu_to_be32(ace->flag);
2722 *p++ = cpu_to_be32(ace->access_mask &
2723 NFS4_ACE_MASK_ALL);
ddd1ea56 2724 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2725 if (status)
2726 goto out;
2727 }
2728 }
2729out_acl:
2730 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2731 p = xdr_reserve_space(xdr, 4);
2732 if (!p)
1da177e4 2733 goto out_resource;
0c9d65e7 2734 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
1da177e4
LT		 2735 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2736 }
2737 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2738 p = xdr_reserve_space(xdr, 4);
2739 if (!p)
1da177e4 2740 goto out_resource;
c373b0a4 2741 *p++ = cpu_to_be32(1);
1da177e4
LT		 2742 }
2743 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2744 p = xdr_reserve_space(xdr, 4);
2745 if (!p)
1da177e4 2746 goto out_resource;
c373b0a4 2747 *p++ = cpu_to_be32(0);
1da177e4
LT		 2748 }
2749 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2750 p = xdr_reserve_space(xdr, 4);
2751 if (!p)
1da177e4 2752 goto out_resource;
c373b0a4 2753 *p++ = cpu_to_be32(1);
1da177e4
LT		 2754 }
2755 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2756 p = xdr_reserve_space(xdr, 4);
2757 if (!p)
1da177e4 2758 goto out_resource;
c373b0a4 2759 *p++ = cpu_to_be32(1);
1da177e4
LT		 2760 }
2761 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2762 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2763 if (!p)
1da177e4 2764 goto out_resource;
0c0c267b
BF		 2765 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2766 fhp->fh_handle.fh_size);
1da177e4
LT		 2767 }
2768 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2769 p = xdr_reserve_space(xdr, 8);
2770 if (!p)
1da177e4 2771 goto out_resource;
b64c7f3b 2772 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 2773 }
2774 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2775 p = xdr_reserve_space(xdr, 8);
2776 if (!p)
1da177e4 2777 goto out_resource;
b64c7f3b 2778 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2779 }
2780 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2781 p = xdr_reserve_space(xdr, 8);
2782 if (!p)
1da177e4 2783 goto out_resource;
b64c7f3b 2784 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2785 }
2786 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2787 p = xdr_reserve_space(xdr, 8);
2788 if (!p)
1da177e4 2789 goto out_resource;
b64c7f3b 2790 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 2791 }
81c3f413 2792 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2793 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2794 if (status)
2795 goto out;
2796 }
1da177e4 2797 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2798 p = xdr_reserve_space(xdr, 4);
2799 if (!p)
1da177e4 2800 goto out_resource;
c373b0a4 2801 *p++ = cpu_to_be32(1);
1da177e4
LT		 2802 }
2803 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2804 p = xdr_reserve_space(xdr, 8);
2805 if (!p)
1da177e4 2806 goto out_resource;
b64c7f3b 2807 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2808 }
2809 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2810 p = xdr_reserve_space(xdr, 4);
2811 if (!p)
1da177e4 2812 goto out_resource;
c373b0a4 2813 *p++ = cpu_to_be32(255);
1da177e4
LT		 2814 }
2815 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2816 p = xdr_reserve_space(xdr, 4);
2817 if (!p)
1da177e4 2818 goto out_resource;
c373b0a4 2819 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 2820 }
2821 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2822 p = xdr_reserve_space(xdr, 8);
2823 if (!p)
1da177e4 2824 goto out_resource;
b64c7f3b 2825 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2826 }
2827 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2828 p = xdr_reserve_space(xdr, 8);
2829 if (!p)
1da177e4 2830 goto out_resource;
b64c7f3b 2831 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2832 }
2833 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2834 p = xdr_reserve_space(xdr, 4);
2835 if (!p)
1da177e4 2836 goto out_resource;
c373b0a4 2837 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 2838 }
2839 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2840 p = xdr_reserve_space(xdr, 4);
2841 if (!p)
1da177e4 2842 goto out_resource;
c373b0a4 2843 *p++ = cpu_to_be32(1);
1da177e4
LT		 2844 }
2845 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2846 p = xdr_reserve_space(xdr, 4);
2847 if (!p)
1da177e4 2848 goto out_resource;
c373b0a4 2849 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 2850 }
2851 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2852 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2853 if (status)
2854 goto out;
2855 }
2856 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2857 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2858 if (status)
2859 goto out;
2860 }
2861 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2862 p = xdr_reserve_space(xdr, 8);
2863 if (!p)
1da177e4 2864 goto out_resource;
c373b0a4
BF		 2865 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2866 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 2867 }
2868 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2869 p = xdr_reserve_space(xdr, 8);
2870 if (!p)
1da177e4
LT		 2871 goto out_resource;
2872 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 2873 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2874 }
2875 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2876 p = xdr_reserve_space(xdr, 8);
2877 if (!p)
1da177e4
LT		 2878 goto out_resource;
2879 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 2880 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2881 }
2882 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2883 p = xdr_reserve_space(xdr, 8);
2884 if (!p)
1da177e4
LT		 2885 goto out_resource;
2886 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 2887 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2888 }
2889 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2890 p = xdr_reserve_space(xdr, 8);
2891 if (!p)
1da177e4
LT		 2892 goto out_resource;
2893 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 2894 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2895 }
2896 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2897 p = xdr_reserve_space(xdr, 12);
2898 if (!p)
1da177e4 2899 goto out_resource;
b64c7f3b 2900 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 2901 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 2902 }
2903 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2904 p = xdr_reserve_space(xdr, 12);
2905 if (!p)
1da177e4 2906 goto out_resource;
16945141 2907 p = encode_time_delta(p, d_inode(dentry));
1da177e4
LT		 2908 }
2909 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2910 p = xdr_reserve_space(xdr, 12);
2911 if (!p)
1da177e4 2912 goto out_resource;
b64c7f3b 2913 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 2914 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 2915 }
2916 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2917 p = xdr_reserve_space(xdr, 12);
2918 if (!p)
1da177e4 2919 goto out_resource;
b64c7f3b 2920 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 2921 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 2922 }
2923 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
0a2050d7
KM		 2924 struct kstat parent_stat;
2925 u64 ino = stat.ino;
2926
ddd1ea56
BF		 2927 p = xdr_reserve_space(xdr, 8);
2928 if (!p)
1da177e4 2929 goto out_resource;
406a7ea9
FF		 2930 /*
2931 * Get parent's attributes if not ignoring crossmount
2932 * and this is the root of a cross-mounted filesystem.
2933 */
2934 if (ignore_crossmnt == 0 &&
0a2050d7
KM		 2935 dentry == exp->ex_path.mnt->mnt_root) {
2936 err = get_parent_attributes(exp, &parent_stat);
2937 if (err)
2938 goto out_nfserr;
2939 ino = parent_stat.ino;
2940 }
2941 p = xdr_encode_hyper(p, ino);
1da177e4 2942 }
9cf514cc 2943#ifdef CONFIG_NFSD_PNFS
6896f15a 2944 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
8a4c3926 2945 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 2946 if (status)
2947 goto out;
2948 }
2949
2950 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
8a4c3926 2951 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 2952 if (status)
2953 goto out;
9cf514cc
CH		 2954 }
2955
2956 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2957 p = xdr_reserve_space(xdr, 4);
2958 if (!p)
2959 goto out_resource;
2960 *p++ = cpu_to_be32(stat.blksize);
2961 }
2962#endif /* CONFIG_NFSD_PNFS */
8c18f205 2963 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
b26b78cb
TM		 2964 u32 supp[3];
2965
2966 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2967 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
2968 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
2969 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
2970
2971 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
75976de6
KM		 2972 if (status)
2973 goto out;
8c18f205 2974 }
7e705706 2975
a8585763
BF		 2976 if (bmval2 & FATTR4_WORD2_CHANGE_ATTR_TYPE) {
2977 p = xdr_reserve_space(xdr, 4);
2978 if (!p)
2979 goto out_resource;
2980 if (IS_I_VERSION(d_inode(dentry)))
2981 *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR);
2982 else
2983 *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_TIME_METADATA);
2984 }
2985
0ab88ca4 2986#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
7d580722
KM		 2987 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2988 status = nfsd4_encode_security_label(xdr, rqstp, context,
2989 contextlen);
2990 if (status)
2991 goto out;
2992 }
0ab88ca4 2993#endif
7d580722 2994
082d4bd7
BF		 2995 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2996 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2997 status = nfs_ok;
2998
2999out:
ba4e55bb 3000#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 3001 if (context)
3002 security_release_secctx(context, contextlen);
ba4e55bb 3003#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 3004 kfree(acl);
18df11d0 3005 if (tempfh) {
d50e6136 3006 fh_put(tempfh);
18df11d0
YZ		 3007 kfree(tempfh);
3008 }
1fcea5b2
BF		 3009 if (status)
3010 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3011 return status;
3012out_nfserr:
b8dd7b9a 3013 status = nfserrno(err);
1da177e4
LT		 3014 goto out;
3015out_resource:
1da177e4
LT		 3016 status = nfserr_resource;
3017 goto out;
1da177e4
LT		 3018}
3019
2825a7f9
BF		 3020static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
3021 struct xdr_buf *buf, __be32 *p, int bytes)
3022{
3023 xdr->scratch.iov_len = 0;
3024 memset(buf, 0, sizeof(struct xdr_buf));
3025 buf->head[0].iov_base = p;
3026 buf->head[0].iov_len = 0;
3027 buf->len = 0;
3028 xdr->buf = buf;
3029 xdr->iov = buf->head;
3030 xdr->p = p;
3031 xdr->end = (void *)p + bytes;
3032 buf->buflen = bytes;
3033}
3034
d5184658
BF		 3035__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
3036 struct svc_fh *fhp, struct svc_export *exp,
3037 struct dentry *dentry, u32 *bmval,
3038 struct svc_rqst *rqstp, int ignore_crossmnt)
3039{
2825a7f9 3040 struct xdr_buf dummy;
d5184658
BF		 3041 struct xdr_stream xdr;
3042 __be32 ret;
3043
2825a7f9 3044 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 3045 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
3046 ignore_crossmnt);
3047 *p = xdr.p;
3048 return ret;
3049}
3050
c0ce6ec8
BF		 3051static inline int attributes_need_mount(u32 *bmval)
3052{
3053 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
3054 return 1;
3055 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
3056 return 1;
3057 return 0;
3058}
3059
b37ad28b 3060static __be32
561f0ed4
BF		 3061nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
3062 const char *name, int namlen)
1da177e4
LT		 3063{
3064 struct svc_export *exp = cd->rd_fhp->fh_export;
3065 struct dentry *dentry;
b37ad28b 3066 __be32 nfserr;
406a7ea9 3067 int ignore_crossmnt = 0;
1da177e4 3068
6c2d4798 3069 dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
1da177e4
LT		 3070 if (IS_ERR(dentry))
3071 return nfserrno(PTR_ERR(dentry));
3072
3073 exp_get(exp);
406a7ea9
FF		 3074 /*
3075 * In the case of a mountpoint, the client may be asking for
3076 * attributes that are only properties of the underlying filesystem
3077 * as opposed to the cross-mounted file system. In such a case,
3078 * we will not follow the cross mount and will fill the attribtutes
3079 * directly from the mountpoint dentry.
3080 */
3227fa41 3081 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 3082 int err;
3083
3227fa41
BF		 3084 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3085 && !attributes_need_mount(cd->rd_bmval)) {
3086 ignore_crossmnt = 1;
3087 goto out_encode;
3088 }
dcb488a3
AA		 3089 /*
3090 * Why the heck aren't we just using nfsd_lookup??
3091 * Different "."/".." handling? Something else?
3092 * At least, add a comment here to explain....
3093 */
021d3a72
BF		 3094 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3095 if (err) {
3096 nfserr = nfserrno(err);
1da177e4
LT		 3097 goto out_put;
3098 }
dcb488a3
AA		 3099 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3100 if (nfserr)
3101 goto out_put;
1da177e4
LT		 3102
3103 }
3227fa41 3104out_encode:
561f0ed4 3105 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 3106 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 3107out_put:
3108 dput(dentry);
3109 exp_put(exp);
3110 return nfserr;
3111}
3112
2ebbc012 3113static __be32 *
561f0ed4 3114nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 3115{
561f0ed4
BF		 3116 __be32 *p;
3117
c3a45617 3118 p = xdr_reserve_space(xdr, 20);
561f0ed4 3119 if (!p)
1da177e4
LT		 3120 return NULL;
3121 *p++ = htonl(2);
3122 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
3123 *p++ = htonl(0); /* bmval1 */
3124
87915c64 3125 *p++ = htonl(4); /* attribute length */
1da177e4 3126 *p++ = nfserr; /* no htonl */
1da177e4
LT		 3127 return p;
3128}
3129
3130static int
a0ad13ef
N		 3131nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3132 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 3133{
a0ad13ef 3134 struct readdir_cd *ccd = ccdv;
1da177e4 3135 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 3136 struct xdr_stream *xdr = cd->xdr;
3137 int start_offset = xdr->buf->len;
3138 int cookie_offset;
aee37764 3139 u32 name_and_cookie;
561f0ed4 3140 int entry_bytes;
b37ad28b 3141 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 3142 __be64 wire_offset;
3143 __be32 *p;
1da177e4
LT		 3144
3145 /* In nfsv4, "." and ".." never make it onto the wire.. */
3146 if (name && isdotent(name, namlen)) {
3147 cd->common.err = nfs_ok;
3148 return 0;
3149 }
3150
561f0ed4
BF		 3151 if (cd->cookie_offset) {
3152 wire_offset = cpu_to_be64(offset);
3153 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3154 &wire_offset, 8);
3155 }
1da177e4 3156
561f0ed4
BF		 3157 p = xdr_reserve_space(xdr, 4);
3158 if (!p)
1da177e4 3159 goto fail;
1da177e4 3160 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 3161 cookie_offset = xdr->buf->len;
3162 p = xdr_reserve_space(xdr, 3*4 + namlen);
3163 if (!p)
3164 goto fail;
1da177e4
LT		 3165 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
3166 p = xdr_encode_array(p, name, namlen); /* name length & name */
3167
561f0ed4 3168 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 3169 switch (nfserr) {
3170 case nfs_ok:
1da177e4
LT		 3171 break;
3172 case nfserr_resource:
3173 nfserr = nfserr_toosmall;
3174 goto fail;
b2c0cea6 3175 case nfserr_noent:
f41c5ad2 3176 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 3177 goto skip_entry;
1da177e4
LT		 3178 default:
3179 /*
3180 * If the client requested the RDATTR_ERROR attribute,
3181 * we stuff the error code into this attribute
3182 * and continue. If this attribute was not requested,
3183 * then in accordance with the spec, we fail the
3184 * entire READDIR operation(!)
3185 */
3186 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3187 goto fail;
561f0ed4 3188 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 3189 if (p == NULL) {
3190 nfserr = nfserr_toosmall;
1da177e4 3191 goto fail;
34081efc 3192 }
1da177e4 3193 }
561f0ed4
BF		 3194 nfserr = nfserr_toosmall;
3195 entry_bytes = xdr->buf->len - start_offset;
3196 if (entry_bytes > cd->rd_maxcount)
3197 goto fail;
3198 cd->rd_maxcount -= entry_bytes;
aee37764
BF		 3199 /*
3200 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3201 * let's always let through the first entry, at least:
3202 */
0ec016e3
BF		 3203 if (!cd->rd_dircount)
3204 goto fail;
3205 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
aee37764
BF		 3206 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3207 goto fail;
3208 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
0ec016e3 3209
561f0ed4 3210 cd->cookie_offset = cookie_offset;
b2c0cea6 3211skip_entry:
1da177e4
LT		 3212 cd->common.err = nfs_ok;
3213 return 0;
3214fail:
561f0ed4 3215 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 3216 cd->common.err = nfserr;
3217 return -EINVAL;
3218}
3219
d0a381dd
BF		 3220static __be32
3221nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 3222{
bc749ca4 3223 __be32 *p;
e2f282b9 3224
d0a381dd
BF		 3225 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3226 if (!p)
3227 return nfserr_resource;
c373b0a4 3228 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 3229 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3230 sizeof(stateid_opaque_t));
d0a381dd 3231 return 0;
e2f282b9
BH		 3232}
3233
695e12f8 3234static __be32
b37ad28b 3235nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 3236{
d0a381dd 3237 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3238 __be32 *p;
1da177e4 3239
bac966d6
BF		 3240 p = xdr_reserve_space(xdr, 8);
3241 if (!p)
3242 return nfserr_resource;
3243 *p++ = cpu_to_be32(access->ac_supported);
3244 *p++ = cpu_to_be32(access->ac_resp_access);
3245 return 0;
1da177e4
LT		 3246}
3247
1d1bc8f2
BF		 3248static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3249{
d0a381dd 3250 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 3251 __be32 *p;
3252
bac966d6
BF		 3253 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3254 if (!p)
3255 return nfserr_resource;
3256 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3257 NFS4_MAX_SESSIONID_LEN);
3258 *p++ = cpu_to_be32(bcts->dir);
3259 /* Upshifting from TCP to RDMA is not supported */
3260 *p++ = cpu_to_be32(0);
3261 return 0;
1d1bc8f2
BF		 3262}
3263
695e12f8 3264static __be32
b37ad28b 3265nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 3266{
d0a381dd
BF		 3267 struct xdr_stream *xdr = &resp->xdr;
3268
bac966d6 3269 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
1da177e4
LT		 3270}
3271
3272
695e12f8 3273static __be32
b37ad28b 3274nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 3275{
d0a381dd 3276 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3277 __be32 *p;
1da177e4 3278
bac966d6
BF		 3279 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3280 if (!p)
3281 return nfserr_resource;
3282 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
0c0c267b 3283 NFS4_VERIFIER_SIZE);
bac966d6 3284 return 0;
1da177e4
LT		 3285}
3286
695e12f8 3287static __be32
b37ad28b 3288nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 3289{
d0a381dd 3290 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3291 __be32 *p;
1da177e4 3292
bac966d6
BF		 3293 p = xdr_reserve_space(xdr, 20);
3294 if (!p)
3295 return nfserr_resource;
3296 encode_cinfo(p, &create->cr_cinfo);
b96811cd 3297 return nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
bac966d6 3298 create->cr_bmval[1], create->cr_bmval[2]);
1da177e4
LT		 3299}
3300
b37ad28b
AV		 3301static __be32
3302nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 3303{
3304 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 3305 struct xdr_stream *xdr = &resp->xdr;
1da177e4 3306
bac966d6
BF		 3307 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3308 getattr->ga_bmval, resp->rqstp, 0);
1da177e4
LT		 3309}
3310
695e12f8
BH		 3311static __be32
3312nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 3313{
d0a381dd 3314 struct xdr_stream *xdr = &resp->xdr;
695e12f8 3315 struct svc_fh *fhp = *fhpp;
1da177e4 3316 unsigned int len;
bc749ca4 3317 __be32 *p;
1da177e4 3318
bac966d6
BF		 3319 len = fhp->fh_handle.fh_size;
3320 p = xdr_reserve_space(xdr, len + 4);
3321 if (!p)
3322 return nfserr_resource;
3323 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3324 return 0;
1da177e4
LT		 3325}
3326
3327/*
3328* Including all fields other than the name, a LOCK4denied structure requires
3329* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3330*/
d0a381dd
BF		 3331static __be32
3332nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 3333{
7c13f344 3334 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 3335 __be32 *p;
1da177e4 3336
8c7424cf 3337again:
d0a381dd 3338 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 3339 if (!p) {
3340 /*
3341 * Don't fail to return the result just because we can't
3342 * return the conflicting open:
3343 */
3344 if (conf->len) {
f98bac5a 3345 kfree(conf->data);
8c7424cf
BF		 3346 conf->len = 0;
3347 conf->data = NULL;
3348 goto again;
3349 }
d0a381dd 3350 return nfserr_resource;
8c7424cf 3351 }
b64c7f3b
BF		 3352 p = xdr_encode_hyper(p, ld->ld_start);
3353 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 3354 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 3355 if (conf->len) {
0c0c267b
BF		 3356 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3357 p = xdr_encode_opaque(p, conf->data, conf->len);
f98bac5a 3358 kfree(conf->data);
1da177e4 3359 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 3360 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 3361 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 3362 }
d0a381dd 3363 return nfserr_denied;
1da177e4
LT		 3364}
3365
695e12f8 3366static __be32
b37ad28b 3367nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 3368{
d0a381dd
BF		 3369 struct xdr_stream *xdr = &resp->xdr;
3370
e2f282b9 3371 if (!nfserr)
d0a381dd 3372 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 3373 else if (nfserr == nfserr_denied)
d0a381dd 3374 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
f98bac5a 3375
695e12f8 3376 return nfserr;
1da177e4
LT		 3377}
3378
695e12f8 3379static __be32
b37ad28b 3380nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 3381{
d0a381dd
BF		 3382 struct xdr_stream *xdr = &resp->xdr;
3383
1da177e4 3384 if (nfserr == nfserr_denied)
d0a381dd 3385 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 3386 return nfserr;
1da177e4
LT		 3387}
3388
695e12f8 3389static __be32
b37ad28b 3390nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 3391{
d0a381dd
BF		 3392 struct xdr_stream *xdr = &resp->xdr;
3393
bac966d6 3394 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
1da177e4
LT		 3395}
3396
3397
695e12f8 3398static __be32
b37ad28b 3399nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 3400{
d0a381dd 3401 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3402 __be32 *p;
1da177e4 3403
bac966d6
BF		 3404 p = xdr_reserve_space(xdr, 20);
3405 if (!p)
3406 return nfserr_resource;
3407 p = encode_cinfo(p, &link->li_cinfo);
3408 return 0;
1da177e4
LT		 3409}
3410
3411
695e12f8 3412static __be32
b37ad28b 3413nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 3414{
d0a381dd 3415 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3416 __be32 *p;
1da177e4 3417
d0a381dd
BF		 3418 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3419 if (nfserr)
bac966d6 3420 return nfserr;
75976de6 3421 p = xdr_reserve_space(xdr, 24);
d0a381dd
BF		 3422 if (!p)
3423 return nfserr_resource;
d05d5744 3424 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4 3425 *p++ = cpu_to_be32(open->op_rflags);
1da177e4 3426
75976de6
KM		 3427 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3428 open->op_bmval[2]);
3429 if (nfserr)
bac966d6 3430 return nfserr;
75976de6
KM		 3431
3432 p = xdr_reserve_space(xdr, 4);
3433 if (!p)
3434 return nfserr_resource;
3435
3436 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 3437 switch (open->op_delegate_type) {
3438 case NFS4_OPEN_DELEGATE_NONE:
3439 break;
3440 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 3441 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3442 if (nfserr)
3443 return nfserr;
3444 p = xdr_reserve_space(xdr, 20);
3445 if (!p)
3446 return nfserr_resource;
c373b0a4 3447 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 3448
3449 /*
3450 * TODO: ACE's in delegations
3451 */
c373b0a4
BF		 3452 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3453 *p++ = cpu_to_be32(0);
3454 *p++ = cpu_to_be32(0);
3455 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 3456 break;
3457 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 3458 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3459 if (nfserr)
3460 return nfserr;
3461 p = xdr_reserve_space(xdr, 32);
3462 if (!p)
3463 return nfserr_resource;
c373b0a4 3464 *p++ = cpu_to_be32(0);
1da177e4
LT		 3465
3466 /*
3467 * TODO: space_limit's in delegations
3468 */
c373b0a4
BF		 3469 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3470 *p++ = cpu_to_be32(~(u32)0);
3471 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3472
3473 /*
3474 * TODO: ACE's in delegations
3475 */
c373b0a4
BF		 3476 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3477 *p++ = cpu_to_be32(0);
3478 *p++ = cpu_to_be32(0);
3479 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3480 break;
d24433cd
BH		 3481 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3482 switch (open->op_why_no_deleg) {
3483 case WND4_CONTENTION:
3484 case WND4_RESOURCE:
d0a381dd
BF		 3485 p = xdr_reserve_space(xdr, 8);
3486 if (!p)
3487 return nfserr_resource;
c373b0a4
BF		 3488 *p++ = cpu_to_be32(open->op_why_no_deleg);
3489 /* deleg signaling not supported yet: */
3490 *p++ = cpu_to_be32(0);
d24433cd
BH		 3491 break;
3492 default:
d0a381dd
BF		 3493 p = xdr_reserve_space(xdr, 4);
3494 if (!p)
3495 return nfserr_resource;
c373b0a4 3496 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3497 }
d24433cd 3498 break;
1da177e4
LT		 3499 default:
3500 BUG();
3501 }
3502 /* XXX save filehandle here */
bac966d6 3503 return 0;
1da177e4
LT		 3504}
3505
695e12f8 3506static __be32
b37ad28b 3507nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3508{
d0a381dd
BF		 3509 struct xdr_stream *xdr = &resp->xdr;
3510
bac966d6 3511 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4
LT		 3512}
3513
695e12f8 3514static __be32
b37ad28b 3515nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3516{
d0a381dd
BF		 3517 struct xdr_stream *xdr = &resp->xdr;
3518
bac966d6 3519 return nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4
LT		 3520}
3521
dc97618d
BF		 3522static __be32 nfsd4_encode_splice_read(
3523 struct nfsd4_compoundres *resp,
3524 struct nfsd4_read *read,
3525 struct file *file, unsigned long maxcount)
1da177e4 3526{
ddd1ea56 3527 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3528 struct xdr_buf *buf = xdr->buf;
dc97618d 3529 u32 eof;
30596768 3530 int space_left;
dc97618d 3531 __be32 nfserr;
fec25fa4 3532 __be32 *p = xdr->p - 2;
1da177e4 3533
d5d5c304
KM		 3534 /* Make sure there will be room for padding if needed */
3535 if (xdr->end - xdr->p < 1)
d0a381dd 3536 return nfserr_resource;
dc97618d 3537
87c5942e 3538 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
83a63072 3539 file, read->rd_offset, &maxcount, &eof);
87c5942e 3540 read->rd_length = maxcount;
dc97618d
BF		 3541 if (nfserr) {
3542 /*
3543 * nfsd_splice_actor may have already messed with the
3544 * page length; reset it so as not to confuse
3545 * xdr_truncate_encode:
3546 */
34a78b48 3547 buf->page_len = 0;
dc97618d 3548 return nfserr;
b0e35fda 3549 }
1da177e4 3550
fec25fa4
BF		 3551 *(p++) = htonl(eof);
3552 *(p++) = htonl(maxcount);
dc97618d 3553
34a78b48
BF		 3554 buf->page_len = maxcount;
3555 buf->len += maxcount;
15b23ef5
BF		 3556 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3557 / PAGE_SIZE;
dc97618d
BF		 3558
3559 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3560 buf->tail[0].iov_base = xdr->p;
3561 buf->tail[0].iov_len = 0;
fec25fa4 3562 xdr->iov = buf->tail;
dc97618d 3563 if (maxcount&3) {
fec25fa4
BF		 3564 int pad = 4 - (maxcount&3);
3565
3566 *(xdr->p++) = 0;
3567
34a78b48 3568 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3569 buf->tail[0].iov_len = pad;
3570 buf->len += pad;
b0e35fda 3571 }
2825a7f9 3572
dc97618d 3573 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3574 buf->buflen - buf->len);
3575 buf->buflen = buf->len + space_left;
dc97618d
BF		 3576 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3577
3578 return 0;
3579}
3580
3581static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3582 struct nfsd4_read *read,
3583 struct file *file, unsigned long maxcount)
3584{
3585 struct xdr_stream *xdr = &resp->xdr;
3586 u32 eof;
3587 int v;
dc97618d 3588 int starting_len = xdr->buf->len - 8;
dc97618d 3589 long len;
b0420980 3590 int thislen;
dc97618d
BF		 3591 __be32 nfserr;
3592 __be32 tmp;
3593 __be32 *p;
b0420980
BF		 3594 u32 zzz = 0;
3595 int pad;
1da177e4
LT		 3596
3597 len = maxcount;
3598 v = 0;
6ff9897d 3599
1055414f 3600 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
b0420980
BF		 3601 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3602 WARN_ON_ONCE(!p);
3603 resp->rqstp->rq_vec[v].iov_base = p;
3604 resp->rqstp->rq_vec[v].iov_len = thislen;
3605 v++;
3606 len -= thislen;
3607
3608 while (len) {
6ff9897d 3609 thislen = min_t(long, len, PAGE_SIZE);
b0420980
BF		 3610 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3611 WARN_ON_ONCE(!p);
3612 resp->rqstp->rq_vec[v].iov_base = p;
6ff9897d 3613 resp->rqstp->rq_vec[v].iov_len = thislen;
1da177e4 3614 v++;
6ff9897d 3615 len -= thislen;
1da177e4
LT		 3616 }
3617 read->rd_vlen = v;
3618
ac503e4a 3619 len = maxcount;
87c5942e 3620 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
83a63072
TM		 3621 resp->rqstp->rq_vec, read->rd_vlen, &maxcount,
3622 &eof);
87c5942e 3623 read->rd_length = maxcount;
dc97618d 3624 if (nfserr)
1da177e4 3625 return nfserr;
b0420980 3626 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
dc97618d 3627
dc97618d
BF		 3628 tmp = htonl(eof);
3629 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3630 tmp = htonl(maxcount);
3631 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3632
b0420980
BF		 3633 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3634 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3635 &zzz, pad);
1da177e4 3636 return 0;
dc97618d
BF		 3637
3638}
3639
3640static __be32
3641nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3642 struct nfsd4_read *read)
3643{
3644 unsigned long maxcount;
3645 struct xdr_stream *xdr = &resp->xdr;
5c4583b2 3646 struct file *file;
dc97618d 3647 int starting_len = xdr->buf->len;
dc97618d 3648 __be32 *p;
dc97618d 3649
5c4583b2
JL		 3650 if (nfserr)
3651 return nfserr;
3652 file = read->rd_nf->nf_file;
3653
dc97618d
BF		 3654 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3655 if (!p) {
779fb0f3 3656 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
bac966d6 3657 return nfserr_resource;
dc97618d 3658 }
68e8bb03
CH		 3659 if (resp->xdr.buf->page_len &&
3660 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
b0420980 3661 WARN_ON_ONCE(1);
bac966d6 3662 return nfserr_resource;
dc97618d 3663 }
dc97618d
BF		 3664 xdr_commit_encode(xdr);
3665
3666 maxcount = svc_max_payload(resp->rqstp);
68e8bb03
CH		 3667 maxcount = min_t(unsigned long, maxcount,
3668 (xdr->buf->buflen - xdr->buf->len));
3c7aa15d 3669 maxcount = min_t(unsigned long, maxcount, read->rd_length);
dc97618d 3670
68e8bb03
CH		 3671 if (file->f_op->splice_read &&
3672 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
96bcad50 3673 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
dc97618d 3674 else
96bcad50 3675 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
dc97618d 3676
96bcad50 3677 if (nfserr)
dc97618d 3678 xdr_truncate_encode(xdr, starting_len);
96bcad50 3679
96bcad50 3680 return nfserr;
1da177e4
LT		 3681}
3682
b37ad28b
AV		 3683static __be32
3684nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3685{
3686 int maxcount;
476a7b1f
BF		 3687 __be32 wire_count;
3688 int zero = 0;
ddd1ea56 3689 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3690 int length_offset = xdr->buf->len;
bc749ca4 3691 __be32 *p;
1da177e4 3692
2825a7f9
BF		 3693 p = xdr_reserve_space(xdr, 4);
3694 if (!p)
3695 return nfserr_resource;
1da177e4 3696 maxcount = PAGE_SIZE;
d0a381dd 3697
476a7b1f
BF		 3698 p = xdr_reserve_space(xdr, maxcount);
3699 if (!p)
4e21ac4b 3700 return nfserr_resource;
1da177e4 3701 /*
fd4a0edf
MS		 3702 * XXX: By default, vfs_readlink() will truncate symlinks if they
3703 * would overflow the buffer. Is this kosher in NFSv4? If not, one
3704 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
3705 * that truncation occurred, and return NFS4ERR_RESOURCE.
1da177e4 3706 */
476a7b1f
BF		 3707 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3708 (char *)p, &maxcount);
1da177e4 3709 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3710 nfserr = nfserr_inval;
3711 if (nfserr) {
1fcea5b2 3712 xdr_truncate_encode(xdr, length_offset);
1da177e4 3713 return nfserr;
d3f627c8 3714 }
1da177e4 3715
476a7b1f
BF		 3716 wire_count = htonl(maxcount);
3717 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
69bbd9c7 3718 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
476a7b1f
BF		 3719 if (maxcount & 3)
3720 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3721 &zero, 4 - (maxcount&3));
1da177e4
LT		 3722 return 0;
3723}
3724
b37ad28b
AV		 3725static __be32
3726nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3727{
3728 int maxcount;
561f0ed4 3729 int bytes_left;
1da177e4 3730 loff_t offset;
561f0ed4 3731 __be64 wire_offset;
ddd1ea56 3732 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3733 int starting_len = xdr->buf->len;
bc749ca4 3734 __be32 *p;
1da177e4 3735
d0a381dd
BF		 3736 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3737 if (!p)
3738 return nfserr_resource;
1da177e4
LT		 3739
3740 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 3741 *p++ = cpu_to_be32(0);
3742 *p++ = cpu_to_be32(0);
4aea24b2
BF		 3743 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3744 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3745
3746 /*
561f0ed4
BF		 3747 * Number of bytes left for directory entries allowing for the
3748 * final 8 bytes of the readdir and a following failed op:
3749 */
3750 bytes_left = xdr->buf->buflen - xdr->buf->len
3751 - COMPOUND_ERR_SLACK_SPACE - 8;
3752 if (bytes_left < 0) {
3753 nfserr = nfserr_resource;
3754 goto err_no_verf;
3755 }
9c2ece6e
SM		 3756 maxcount = svc_max_payload(resp->rqstp);
3757 maxcount = min_t(u32, readdir->rd_maxcount, maxcount);
561f0ed4
BF		 3758 /*
3759 * Note the rfc defines rd_maxcount as the size of the
3760 * READDIR4resok structure, which includes the verifier above
3761 * and the 8 bytes encoded at the end of this function:
1da177e4 3762 */
561f0ed4
BF		 3763 if (maxcount < 16) {
3764 nfserr = nfserr_toosmall;
1da177e4
LT		 3765 goto err_no_verf;
3766 }
561f0ed4 3767 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3768
aee37764
BF		 3769 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3770 if (!readdir->rd_dircount)
9c2ece6e 3771 readdir->rd_dircount = svc_max_payload(resp->rqstp);
aee37764 3772
561f0ed4
BF		 3773 readdir->xdr = xdr;
3774 readdir->rd_maxcount = maxcount;
1da177e4 3775 readdir->common.err = 0;
561f0ed4 3776 readdir->cookie_offset = 0;
1da177e4
LT		 3777
3778 offset = readdir->rd_cookie;
3779 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3780 &offset,
3781 &readdir->common, nfsd4_encode_dirent);
3782 if (nfserr == nfs_ok &&
3783 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3784 xdr->buf->len == starting_len + 8) {
3785 /* nothing encoded; which limit did we hit?: */
3786 if (maxcount - 16 < bytes_left)
3787 /* It was the fault of rd_maxcount: */
3788 nfserr = nfserr_toosmall;
3789 else
3790 /* We ran out of buffer space: */
3791 nfserr = nfserr_resource;
3792 }
1da177e4
LT		 3793 if (nfserr)
3794 goto err_no_verf;
3795
561f0ed4
BF		 3796 if (readdir->cookie_offset) {
3797 wire_offset = cpu_to_be64(offset);
3798 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3799 &wire_offset, 8);
3800 }
1da177e4 3801
561f0ed4
BF		 3802 p = xdr_reserve_space(xdr, 8);
3803 if (!p) {
3804 WARN_ON_ONCE(1);
3805 goto err_no_verf;
3806 }
1da177e4
LT		 3807 *p++ = 0; /* no more entries */
3808 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3809
3810 return 0;
3811err_no_verf:
1fcea5b2 3812 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3813 return nfserr;
3814}
3815
695e12f8 3816static __be32
b37ad28b 3817nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3818{
d0a381dd 3819 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3820 __be32 *p;
1da177e4 3821
bac966d6
BF		 3822 p = xdr_reserve_space(xdr, 20);
3823 if (!p)
3824 return nfserr_resource;
3825 p = encode_cinfo(p, &remove->rm_cinfo);
3826 return 0;
1da177e4
LT		 3827}
3828
695e12f8 3829static __be32
b37ad28b 3830nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3831{
d0a381dd 3832 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3833 __be32 *p;
1da177e4 3834
bac966d6
BF		 3835 p = xdr_reserve_space(xdr, 40);
3836 if (!p)
3837 return nfserr_resource;
3838 p = encode_cinfo(p, &rename->rn_sinfo);
3839 p = encode_cinfo(p, &rename->rn_tinfo);
3840 return 0;
1da177e4
LT		 3841}
3842
695e12f8 3843static __be32
bac966d6 3844nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
dcb488a3 3845{
676e4ebd 3846 u32 i, nflavs, supported;
4796f457
BF		 3847 struct exp_flavor_info *flavs;
3848 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3849 __be32 *p, *flavorsp;
3850 static bool report = true;
dcb488a3 3851
4796f457
BF		 3852 if (exp->ex_nflavors) {
3853 flavs = exp->ex_flavors;
3854 nflavs = exp->ex_nflavors;
3855 } else { /* Handling of some defaults in absence of real secinfo: */
3856 flavs = def_flavs;
3857 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3858 nflavs = 2;
3859 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3860 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3861 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3862 nflavs = 1;
3863 flavs[0].pseudoflavor
3864 = svcauth_gss_flavor(exp->ex_client);
3865 } else {
3866 nflavs = 1;
3867 flavs[0].pseudoflavor
3868 = exp->ex_client->flavour->flavour;
3869 }
3870 }
3871
676e4ebd 3872 supported = 0;
d0a381dd
BF		 3873 p = xdr_reserve_space(xdr, 4);
3874 if (!p)
bac966d6 3875 return nfserr_resource;
676e4ebd 3876 flavorsp = p++; /* to be backfilled later */
676e4ebd 3877
4796f457 3878 for (i = 0; i < nflavs; i++) {
676e4ebd 3879 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3880 struct rpcsec_gss_info info;
dcb488a3 3881
676e4ebd
CL		 3882 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3883 supported++;
d0a381dd
BF		 3884 p = xdr_reserve_space(xdr, 4 + 4 +
3885 XDR_LEN(info.oid.len) + 4 + 4);
3886 if (!p)
bac966d6 3887 return nfserr_resource;
c373b0a4 3888 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 3889 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 3890 *p++ = cpu_to_be32(info.qop);
3891 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 3892 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3893 supported++;
d0a381dd
BF		 3894 p = xdr_reserve_space(xdr, 4);
3895 if (!p)
bac966d6 3896 return nfserr_resource;
c373b0a4 3897 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 3898 } else {
3899 if (report)
3900 pr_warn("NFS: SECINFO: security flavor %u "
3901 "is not supported\n", pf);
dcb488a3
AA		 3902 }
3903 }
a77c806f 3904
676e4ebd
CL		 3905 if (nflavs != supported)
3906 report = false;
3907 *flavorsp = htonl(supported);
bac966d6 3908 return 0;
dcb488a3
AA		 3909}
3910
22b6dee8
MJ		 3911static __be32
3912nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3913 struct nfsd4_secinfo *secinfo)
3914{
d0a381dd
BF		 3915 struct xdr_stream *xdr = &resp->xdr;
3916
bac966d6 3917 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
22b6dee8
MJ		 3918}
3919
3920static __be32
3921nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3922 struct nfsd4_secinfo_no_name *secinfo)
3923{
d0a381dd
BF		 3924 struct xdr_stream *xdr = &resp->xdr;
3925
bac966d6 3926 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
22b6dee8
MJ		 3927}
3928
1da177e4
LT		 3929/*
3930 * The SETATTR encode routine is special -- it always encodes a bitmap,
3931 * regardless of the error status.
3932 */
695e12f8 3933static __be32
b37ad28b 3934nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3935{
d0a381dd 3936 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3937 __be32 *p;
1da177e4 3938
d0a381dd
BF		 3939 p = xdr_reserve_space(xdr, 16);
3940 if (!p)
3941 return nfserr_resource;
1da177e4 3942 if (nfserr) {
c373b0a4
BF		 3943 *p++ = cpu_to_be32(3);
3944 *p++ = cpu_to_be32(0);
3945 *p++ = cpu_to_be32(0);
3946 *p++ = cpu_to_be32(0);
1da177e4
LT		 3947 }
3948 else {
c373b0a4
BF		 3949 *p++ = cpu_to_be32(3);
3950 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3951 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3952 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 3953 }
695e12f8 3954 return nfserr;
1da177e4
LT		 3955}
3956
695e12f8 3957static __be32
b37ad28b 3958nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3959{
d0a381dd 3960 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3961 __be32 *p;
1da177e4
LT		 3962
3963 if (!nfserr) {
d0a381dd
BF		 3964 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3965 if (!p)
3966 return nfserr_resource;
0c0c267b
BF		 3967 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3968 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3969 NFS4_VERIFIER_SIZE);
1da177e4
LT		 3970 }
3971 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3972 p = xdr_reserve_space(xdr, 8);
3973 if (!p)
3974 return nfserr_resource;
c373b0a4
BF		 3975 *p++ = cpu_to_be32(0);
3976 *p++ = cpu_to_be32(0);
1da177e4 3977 }
695e12f8 3978 return nfserr;
1da177e4
LT		 3979}
3980
695e12f8 3981static __be32
b37ad28b 3982nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3983{
d0a381dd 3984 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3985 __be32 *p;
1da177e4 3986
bac966d6
BF		 3987 p = xdr_reserve_space(xdr, 16);
3988 if (!p)
3989 return nfserr_resource;
3990 *p++ = cpu_to_be32(write->wr_bytes_written);
3991 *p++ = cpu_to_be32(write->wr_how_written);
3992 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3993 NFS4_VERIFIER_SIZE);
3994 return 0;
1da177e4
LT		 3995}
3996
2db134eb 3997static __be32
57b7b43b 3998nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3999 struct nfsd4_exchange_id *exid)
4000{
d0a381dd 4001 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4002 __be32 *p;
0733d213
AA		 4003 char *major_id;
4004 char *server_scope;
4005 int major_id_sz;
4006 int server_scope_sz;
4007 uint64_t minor_id = 0;
4008
0733d213
AA		 4009 major_id = utsname()->nodename;
4010 major_id_sz = strlen(major_id);
4011 server_scope = utsname()->nodename;
4012 server_scope_sz = strlen(server_scope);
4013
d0a381dd 4014 p = xdr_reserve_space(xdr,
0733d213
AA		 4015 8 /* eir_clientid */ +
4016 4 /* eir_sequenceid */ +
4017 4 /* eir_flags */ +
a8bb84bc 4018 4 /* spr_how */);
d0a381dd
BF		 4019 if (!p)
4020 return nfserr_resource;
0733d213 4021
0c0c267b 4022 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 4023 *p++ = cpu_to_be32(exid->seqid);
4024 *p++ = cpu_to_be32(exid->flags);
0733d213 4025
c373b0a4 4026 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 4027
57266a6e
BF		 4028 switch (exid->spa_how) {
4029 case SP4_NONE:
4030 break;
4031 case SP4_MACH_CRED:
4032 /* spo_must_enforce bitmap: */
bac966d6 4033 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 4034 exid->spo_must_enforce[0],
4035 exid->spo_must_enforce[1],
4036 exid->spo_must_enforce[2]);
bac966d6
BF		 4037 if (nfserr)
4038 return nfserr;
ed941643 4039 /* spo_must_allow bitmap: */
bac966d6 4040 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 4041 exid->spo_must_allow[0],
4042 exid->spo_must_allow[1],
4043 exid->spo_must_allow[2]);
bac966d6
BF		 4044 if (nfserr)
4045 return nfserr;
57266a6e
BF		 4046 break;
4047 default:
4048 WARN_ON_ONCE(1);
4049 }
0733d213 4050
d0a381dd 4051 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 4052 8 /* so_minor_id */ +
4053 4 /* so_major_id.len */ +
4054 (XDR_QUADLEN(major_id_sz) * 4) +
4055 4 /* eir_server_scope.len */ +
4056 (XDR_QUADLEN(server_scope_sz) * 4) +
4057 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 4058 if (!p)
4059 return nfserr_resource;
a8bb84bc 4060
0733d213 4061 /* The server_owner struct */
b64c7f3b 4062 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 4063 /* major id */
0c0c267b 4064 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 4065
4066 /* Server scope */
0c0c267b 4067 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 4068
4069 /* Implementation id */
c373b0a4 4070 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 4071 return 0;
2db134eb
AA		 4072}
4073
4074static __be32
57b7b43b 4075nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4076 struct nfsd4_create_session *sess)
4077{
d0a381dd 4078 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4079 __be32 *p;
ec6b5d7b 4080
d0a381dd
BF		 4081 p = xdr_reserve_space(xdr, 24);
4082 if (!p)
4083 return nfserr_resource;
0c0c267b
BF		 4084 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4085 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4086 *p++ = cpu_to_be32(sess->seqid);
4087 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 4088
d0a381dd
BF		 4089 p = xdr_reserve_space(xdr, 28);
4090 if (!p)
4091 return nfserr_resource;
c373b0a4
BF		 4092 *p++ = cpu_to_be32(0); /* headerpadsz */
4093 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4094 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4095 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4096 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4097 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4098 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4099
4100 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 4101 p = xdr_reserve_space(xdr, 4);
4102 if (!p)
4103 return nfserr_resource;
c373b0a4 4104 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 4105 }
4106
d0a381dd
BF		 4107 p = xdr_reserve_space(xdr, 28);
4108 if (!p)
4109 return nfserr_resource;
c373b0a4
BF		 4110 *p++ = cpu_to_be32(0); /* headerpadsz */
4111 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4112 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4113 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4114 *p++ = cpu_to_be32(sess->back_channel.maxops);
4115 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4116 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4117
4118 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 4119 p = xdr_reserve_space(xdr, 4);
4120 if (!p)
4121 return nfserr_resource;
c373b0a4 4122 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 4123 }
4124 return 0;
2db134eb
AA		 4125}
4126
c47d832b 4127static __be32
57b7b43b 4128nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4129 struct nfsd4_sequence *seq)
4130{
d0a381dd 4131 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4132 __be32 *p;
b85d4c01 4133
d0a381dd
BF		 4134 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4135 if (!p)
4136 return nfserr_resource;
0c0c267b
BF		 4137 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4138 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4139 *p++ = cpu_to_be32(seq->seqid);
4140 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 4141 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 4142 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4143 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4144 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 4145
f5236013 4146 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 4147 return 0;
2db134eb
AA		 4148}
4149
2355c596 4150static __be32
57b7b43b 4151nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 4152 struct nfsd4_test_stateid *test_stateid)
4153{
d0a381dd 4154 struct xdr_stream *xdr = &resp->xdr;
03cfb420 4155 struct nfsd4_test_stateid_id *stateid, *next;
17456804 4156 __be32 *p;
17456804 4157
d0a381dd
BF		 4158 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4159 if (!p)
4160 return nfserr_resource;
17456804 4161 *p++ = htonl(test_stateid->ts_num_ids);
17456804 4162
03cfb420 4163 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 4164 *p++ = stateid->ts_id_status;
17456804 4165 }
17456804 4166
bac966d6 4167 return 0;
17456804
BS		 4168}
4169
9cf514cc
CH		 4170#ifdef CONFIG_NFSD_PNFS
4171static __be32
4172nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4173 struct nfsd4_getdeviceinfo *gdev)
4174{
4175 struct xdr_stream *xdr = &resp->xdr;
f961e3f2 4176 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4177 u32 starting_len = xdr->buf->len, needed_len;
4178 __be32 *p;
4179
9cf514cc
CH		 4180 p = xdr_reserve_space(xdr, 4);
4181 if (!p)
bac966d6 4182 return nfserr_resource;
9cf514cc
CH		 4183
4184 *p++ = cpu_to_be32(gdev->gd_layout_type);
4185
4186 /* If maxcount is 0 then just update notifications */
4187 if (gdev->gd_maxcount != 0) {
f961e3f2 4188 ops = nfsd4_layout_ops[gdev->gd_layout_type];
9cf514cc
CH		 4189 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4190 if (nfserr) {
4191 /*
4192 * We don't bother to burden the layout drivers with
4193 * enforcing gd_maxcount, just tell the client to
4194 * come back with a bigger buffer if it's not enough.
4195 */
4196 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4197 goto toosmall;
bac966d6 4198 return nfserr;
9cf514cc
CH		 4199 }
4200 }
4201
9cf514cc
CH		 4202 if (gdev->gd_notify_types) {
4203 p = xdr_reserve_space(xdr, 4 + 4);
4204 if (!p)
bac966d6 4205 return nfserr_resource;
9cf514cc
CH		 4206 *p++ = cpu_to_be32(1); /* bitmap length */
4207 *p++ = cpu_to_be32(gdev->gd_notify_types);
4208 } else {
4209 p = xdr_reserve_space(xdr, 4);
4210 if (!p)
bac966d6 4211 return nfserr_resource;
9cf514cc
CH		 4212 *p++ = 0;
4213 }
4214
bac966d6 4215 return 0;
9cf514cc
CH		 4216toosmall:
4217 dprintk("%s: maxcount too small\n", __func__);
4218 needed_len = xdr->buf->len + 4 /* notifications */;
4219 xdr_truncate_encode(xdr, starting_len);
4220 p = xdr_reserve_space(xdr, 4);
bac966d6
BF		 4221 if (!p)
4222 return nfserr_resource;
4223 *p++ = cpu_to_be32(needed_len);
4224 return nfserr_toosmall;
9cf514cc
CH		 4225}
4226
4227static __be32
4228nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4229 struct nfsd4_layoutget *lgp)
4230{
4231 struct xdr_stream *xdr = &resp->xdr;
f961e3f2 4232 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4233 __be32 *p;
4234
9cf514cc
CH		 4235 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4236 if (!p)
bac966d6 4237 return nfserr_resource;
9cf514cc
CH		 4238
4239 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4240 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4241 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4242 sizeof(stateid_opaque_t));
4243
4244 *p++ = cpu_to_be32(1); /* we always return a single layout */
4245 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4246 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4247 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4248 *p++ = cpu_to_be32(lgp->lg_layout_type);
4249
f961e3f2 4250 ops = nfsd4_layout_ops[lgp->lg_layout_type];
bac966d6 4251 return ops->encode_layoutget(xdr, lgp);
9cf514cc
CH		 4252}
4253
4254static __be32
4255nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4256 struct nfsd4_layoutcommit *lcp)
4257{
4258 struct xdr_stream *xdr = &resp->xdr;
4259 __be32 *p;
4260
9cf514cc
CH		 4261 p = xdr_reserve_space(xdr, 4);
4262 if (!p)
4263 return nfserr_resource;
4264 *p++ = cpu_to_be32(lcp->lc_size_chg);
4265 if (lcp->lc_size_chg) {
4266 p = xdr_reserve_space(xdr, 8);
4267 if (!p)
4268 return nfserr_resource;
4269 p = xdr_encode_hyper(p, lcp->lc_newsize);
4270 }
4271
bac966d6 4272 return 0;
9cf514cc
CH		 4273}
4274
4275static __be32
4276nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4277 struct nfsd4_layoutreturn *lrp)
4278{
4279 struct xdr_stream *xdr = &resp->xdr;
4280 __be32 *p;
4281
9cf514cc
CH		 4282 p = xdr_reserve_space(xdr, 4);
4283 if (!p)
4284 return nfserr_resource;
4285 *p++ = cpu_to_be32(lrp->lrs_present);
4286 if (lrp->lrs_present)
376675da 4287 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
bac966d6 4288 return 0;
9cf514cc
CH		 4289}
4290#endif /* CONFIG_NFSD_PNFS */
4291
29ae7f9d 4292static __be32
e0639dc5
OK		 4293nfsd42_encode_write_res(struct nfsd4_compoundres *resp,
4294 struct nfsd42_write_res *write, bool sync)
29ae7f9d
AS		 4295{
4296 __be32 *p;
e0639dc5
OK		 4297 p = xdr_reserve_space(&resp->xdr, 4);
4298 if (!p)
4299 return nfserr_resource;
29ae7f9d 4300
e0639dc5
OK		 4301 if (sync)
4302 *p++ = cpu_to_be32(0);
4303 else {
4304 __be32 nfserr;
4305 *p++ = cpu_to_be32(1);
4306 nfserr = nfsd4_encode_stateid(&resp->xdr, &write->cb_stateid);
4307 if (nfserr)
4308 return nfserr;
4309 }
4310 p = xdr_reserve_space(&resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE);
29ae7f9d
AS		 4311 if (!p)
4312 return nfserr_resource;
4313
29ae7f9d
AS		 4314 p = xdr_encode_hyper(p, write->wr_bytes_written);
4315 *p++ = cpu_to_be32(write->wr_stable_how);
4316 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4317 NFS4_VERIFIER_SIZE);
4318 return nfs_ok;
4319}
4320
51911868
OK		 4321static __be32
4322nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns)
4323{
4324 struct xdr_stream *xdr = &resp->xdr;
4325 struct nfs42_netaddr *addr;
4326 __be32 *p;
4327
4328 p = xdr_reserve_space(xdr, 4);
4329 *p++ = cpu_to_be32(ns->nl4_type);
4330
4331 switch (ns->nl4_type) {
4332 case NL4_NETADDR:
4333 addr = &ns->u.nl4_addr;
4334
4335 /* netid_len, netid, uaddr_len, uaddr (port included
4336 * in RPCBIND_MAXUADDRLEN)
4337 */
4338 p = xdr_reserve_space(xdr,
4339 4 /* netid len */ +
4340 (XDR_QUADLEN(addr->netid_len) * 4) +
4341 4 /* uaddr len */ +
4342 (XDR_QUADLEN(addr->addr_len) * 4));
4343 if (!p)
4344 return nfserr_resource;
4345
4346 *p++ = cpu_to_be32(addr->netid_len);
4347 p = xdr_encode_opaque_fixed(p, addr->netid,
4348 addr->netid_len);
4349 *p++ = cpu_to_be32(addr->addr_len);
4350 p = xdr_encode_opaque_fixed(p, addr->addr,
4351 addr->addr_len);
4352 break;
4353 default:
4354 WARN_ON_ONCE(ns->nl4_type != NL4_NETADDR);
4355 return nfserr_inval;
4356 }
4357
4358 return 0;
4359}
4360
29ae7f9d
AS		 4361static __be32
4362nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4363 struct nfsd4_copy *copy)
4364{
4365 __be32 *p;
4366
e0639dc5
OK		 4367 nfserr = nfsd42_encode_write_res(resp, &copy->cp_res,
4368 copy->cp_synchronous);
bac966d6
BF		 4369 if (nfserr)
4370 return nfserr;
29ae7f9d 4371
bac966d6 4372 p = xdr_reserve_space(&resp->xdr, 4 + 4);
edcc8452 4373 *p++ = xdr_one; /* cr_consecutive */
bac966d6
BF		 4374 *p++ = cpu_to_be32(copy->cp_synchronous);
4375 return 0;
29ae7f9d
AS		 4376}
4377
6308bc98
OK		 4378static __be32
4379nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
4380 struct nfsd4_offload_status *os)
4381{
4382 struct xdr_stream *xdr = &resp->xdr;
4383 __be32 *p;
4384
4385 p = xdr_reserve_space(xdr, 8 + 4);
4386 if (!p)
4387 return nfserr_resource;
4388 p = xdr_encode_hyper(p, os->count);
4389 *p++ = cpu_to_be32(0);
4390
4391 return nfserr;
4392}
4393
51911868
OK		 4394static __be32
4395nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr,
4396 struct nfsd4_copy_notify *cn)
4397{
4398 struct xdr_stream *xdr = &resp->xdr;
4399 __be32 *p;
4400
4401 if (nfserr)
4402 return nfserr;
4403
4404 /* 8 sec, 4 nsec */
4405 p = xdr_reserve_space(xdr, 12);
4406 if (!p)
4407 return nfserr_resource;
4408
4409 /* cnr_lease_time */
4410 p = xdr_encode_hyper(p, cn->cpn_sec);
4411 *p++ = cpu_to_be32(cn->cpn_nsec);
4412
4413 /* cnr_stateid */
4414 nfserr = nfsd4_encode_stateid(xdr, &cn->cpn_cnr_stateid);
4415 if (nfserr)
4416 return nfserr;
4417
4418 /* cnr_src.nl_nsvr */
4419 p = xdr_reserve_space(xdr, 4);
4420 if (!p)
4421 return nfserr_resource;
4422
4423 *p++ = cpu_to_be32(1);
4424
4425 return nfsd42_encode_nl4_server(resp, &cn->cpn_src);
4426}
4427
24bab491
AS		 4428static __be32
4429nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4430 struct nfsd4_seek *seek)
4431{
4432 __be32 *p;
4433
24bab491
AS		 4434 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4435 *p++ = cpu_to_be32(seek->seek_eof);
4436 p = xdr_encode_hyper(p, seek->seek_pos);
4437
bac966d6 4438 return 0;
24bab491
AS		 4439}
4440
695e12f8
BH		 4441static __be32
4442nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4443{
4444 return nfserr;
4445}
4446
4447typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4448
2db134eb
AA		 4449/*
4450 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4451 * since we don't need to filter out obsolete ops as this is
4452 * done in the decoding phase.
4453 */
c1df609d 4454static const nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 4455 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4456 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4457 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4458 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4459 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4460 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4461 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4462 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4463 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4464 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4465 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4466 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4467 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4468 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4469 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4470 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 4471 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 4472 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4473 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4474 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4475 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4476 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4477 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4478 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4479 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4480 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4481 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4482 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4483 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4484 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4485 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4486 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4487 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4488 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4489 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4490 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4491 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 4492
4493 /* NFSv4.1 operations */
4494 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 4495 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 4496 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4497 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 4498 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4499 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb 4500 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc
CH		 4501#ifdef CONFIG_NFSD_PNFS
4502 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4503 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4504 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4505 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4506 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4507#else
2db134eb
AA		 4508 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4509 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4510 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4511 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4512 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc 4513#endif
22b6dee8 4514 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 4515 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4516 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 4517 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 4518 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4519 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4520 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
87a15a80
AS		 4521
4522 /* NFSv4.2 operations */
4523 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
29ae7f9d 4524 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
51911868 4525 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_copy_notify,
87a15a80
AS		 4526 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4527 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4528 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4529 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4530 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
6308bc98 4531 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status,
87a15a80 4532 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
24bab491 4533 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
87a15a80 4534 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
ffa0160a 4535 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 4536};
4537
496c262c 4538/*
a8095f7e
BF		 4539 * Calculate whether we still have space to encode repsize bytes.
4540 * There are two considerations:
4541 * - For NFS versions >=4.1, the size of the reply must stay within
4542 * session limits
4543 * - For all NFS versions, we must stay within limited preallocated
4544 * buffer space.
496c262c 4545 *
a8095f7e
BF		 4546 * This is called before the operation is processed, so can only provide
4547 * an upper estimate. For some nonidempotent operations (such as
4548 * getattr), it's not necessarily a problem if that estimate is wrong,
4549 * as we can fail it after processing without significant side effects.
496c262c 4550 */
a8095f7e 4551__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 4552{
67492c99 4553 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 4554 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 4555
47ee5298
BF		 4556 if (buf->len + respsize <= buf->buflen)
4557 return nfs_ok;
4558 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 4559 return nfserr_resource;
47ee5298
BF		 4560 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4561 WARN_ON_ONCE(1);
4562 return nfserr_rep_too_big_to_cache;
ea8d7720 4563 }
47ee5298 4564 return nfserr_rep_too_big;
496c262c
AA		 4565}
4566
1da177e4
LT		 4567void
4568nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4569{
082d4bd7 4570 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 4571 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 4572 struct svc_rqst *rqstp = resp->rqstp;
34b1744c 4573 const struct nfsd4_operation *opdesc = op->opdesc;
082d4bd7 4574 int post_err_offset;
07d1f802 4575 nfsd4_enc encoder;
bc749ca4 4576 __be32 *p;
1da177e4 4577
d0a381dd
BF		 4578 p = xdr_reserve_space(xdr, 8);
4579 if (!p) {
4580 WARN_ON_ONCE(1);
4581 return;
4582 }
c373b0a4 4583 *p++ = cpu_to_be32(op->opnum);
082d4bd7 4584 post_err_offset = xdr->buf->len;
1da177e4 4585
695e12f8
BH		 4586 if (op->opnum == OP_ILLEGAL)
4587 goto status;
b7571e4c
BF		 4588 if (op->status && opdesc &&
4589 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
4590 goto status;
695e12f8
BH		 4591 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4592 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 4593 encoder = nfsd4_enc_ops[op->opnum];
4594 op->status = encoder(resp, op->status, &op->u);
34b1744c
BF		 4595 if (opdesc && opdesc->op_release)
4596 opdesc->op_release(&op->u);
2825a7f9
BF		 4597 xdr_commit_encode(xdr);
4598
067e1ace 4599 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 4600 if (!op->status) {
4601 int space_needed = 0;
4602 if (!nfsd4_last_compound_op(rqstp))
4603 space_needed = COMPOUND_ERR_SLACK_SPACE;
4604 op->status = nfsd4_check_resp_size(resp, space_needed);
4605 }
c8f13d97
BF		 4606 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4607 struct nfsd4_slot *slot = resp->cstate.slot;
4608
4609 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4610 op->status = nfserr_rep_too_big_to_cache;
4611 else
4612 op->status = nfserr_rep_too_big;
4613 }
07d1f802
BF		 4614 if (op->status == nfserr_resource ||
4615 op->status == nfserr_rep_too_big ||
4616 op->status == nfserr_rep_too_big_to_cache) {
4617 /*
4618 * The operation may have already been encoded or
4619 * partially encoded. No op returns anything additional
4620 * in the case of one of these three errors, so we can
4621 * just truncate back to after the status. But it's a
4622 * bug if we had to do this on a non-idempotent op:
4623 */
4624 warn_on_nonidempotent_op(op);
082d4bd7 4625 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 4626 }
9411b1d4 4627 if (so) {
082d4bd7
BF		 4628 int len = xdr->buf->len - post_err_offset;
4629
9411b1d4 4630 so->so_replay.rp_status = op->status;
082d4bd7
BF		 4631 so->so_replay.rp_buflen = len;
4632 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4633 so->so_replay.rp_buf, len);
9411b1d4 4634 }
695e12f8 4635status:
082d4bd7
BF		 4636 /* Note that op->status is already in network byte order: */
4637 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 4638}
4639
4640/*
4641 * Encode the reply stored in the stateowner reply cache
4642 *
4643 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4644 * previously sent already encoded operation.
1da177e4
LT		 4645 */
4646void
d0a381dd 4647nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 4648{
bc749ca4 4649 __be32 *p;
1da177e4
LT		 4650 struct nfs4_replay *rp = op->replay;
4651
d0a381dd
BF		 4652 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4653 if (!p) {
4654 WARN_ON_ONCE(1);
4655 return;
4656 }
c373b0a4 4657 *p++ = cpu_to_be32(op->opnum);
1da177e4 4658 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 4659
0c0c267b 4660 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 4661}
4662
1da177e4 4663int
63f8de37 4664nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
1da177e4
LT		 4665{
4666 return xdr_ressize_check(rqstp, p);
4667}
4668
8537488b 4669void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
1da177e4 4670{
3e98abff
BF		 4671 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4672
1da177e4
LT		 4673 if (args->ops != args->iops) {
4674 kfree(args->ops);
4675 args->ops = args->iops;
4676 }
f99d49ad
JJ		 4677 kfree(args->tmpp);
4678 args->tmpp = NULL;
1da177e4 4679 while (args->to_free) {
d5e23383 4680 struct svcxdr_tmpbuf *tb = args->to_free;
1da177e4 4681 args->to_free = tb->next;
1da177e4
LT		 4682 kfree(tb);
4683 }
4684}
4685
4686int
026fec7e 4687nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
1da177e4 4688{
026fec7e
CH		 4689 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4690
e874f9f8
JL		 4691 if (rqstp->rq_arg.head[0].iov_len % 4) {
4692 /* client is nuts */
4693 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4694 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4695 return 0;
4696 }
1da177e4
LT		 4697 args->p = p;
4698 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4699 args->pagelist = rqstp->rq_arg.pages;
4700 args->pagelen = rqstp->rq_arg.page_len;
eae03e2a 4701 args->tail = false;
1da177e4
LT		 4702 args->tmpp = NULL;
4703 args->to_free = NULL;
4704 args->ops = args->iops;
4705 args->rqstp = rqstp;
4706
3e98abff 4707 return !nfsd4_decode_compound(args);
1da177e4
LT		 4708}
4709
4710int
63f8de37 4711nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
1da177e4
LT		 4712{
4713 /*
4714 * All that remains is to write the tag and operation count...
4715 */
63f8de37 4716 struct nfsd4_compoundres *resp = rqstp->rq_resp;
6ac90391
BF		 4717 struct xdr_buf *buf = resp->xdr.buf;
4718
4719 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4720 buf->tail[0].iov_len);
dd97fdde 4721
2825a7f9
BF		 4722 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4723
1da177e4
LT		 4724 p = resp->tagp;
4725 *p++ = htonl(resp->taglen);
4726 memcpy(p, resp->tag, resp->taglen);
4727 p += XDR_QUADLEN(resp->taglen);
4728 *p++ = htonl(resp->opcnt);
4729
b607664e 4730 nfsd4_sequence_done(resp);
1da177e4
LT		 4731 return 1;
4732}
4733
4734/*
4735 * Local variables:
4736 * c-basic-offset: 8
4737 * End:
4738 */
Linux 6.x block layer and io_uring tree(s)