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nfsd: store stat times in fill_pre_wcc() instead of inode times
[linux-2.6-block.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1da177e4
LT		 34 */
35
47057abd 36#include <linux/fs_struct.h>
96bcad50 37#include <linux/file.h>
5a0e3ad6 38#include <linux/slab.h>
1da177e4 39#include <linux/namei.h>
341eb184 40#include <linux/statfs.h>
0733d213 41#include <linux/utsname.h>
17456804 42#include <linux/pagemap.h>
4796f457 43#include <linux/sunrpc/svcauth_gss.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"
2ca72e17 53
18032ca0
DQ		 54#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
55#include <linux/security.h>
56#endif
57
58
1da177e4
LT		 59#define NFSDDBG_FACILITY NFSDDBG_XDR
60
5cf23dbb 61const u32 nfsd_suppattrs[3][3] = {
916d2d84
BF		 62 {NFSD4_SUPPORTED_ATTRS_WORD0,
63 NFSD4_SUPPORTED_ATTRS_WORD1,
64 NFSD4_SUPPORTED_ATTRS_WORD2},
65
66 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
67 NFSD4_1_SUPPORTED_ATTRS_WORD1,
68 NFSD4_1_SUPPORTED_ATTRS_WORD2},
69
70 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
71 NFSD4_1_SUPPORTED_ATTRS_WORD1,
72 NFSD4_2_SUPPORTED_ATTRS_WORD2},
73};
74
42ca0993
BF		 75/*
76 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
77 * directory in order to indicate to the client that a filesystem boundary is present
78 * We use a fixed fsid for a referral
79 */
80#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
81#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
82
b37ad28b 83static __be32
a36b1725 84check_filename(char *str, int len)
1da177e4
LT		 85{
86 int i;
87
88 if (len == 0)
89 return nfserr_inval;
90 if (isdotent(str, len))
a36b1725 91 return nfserr_badname;
1da177e4
LT		 92 for (i = 0; i < len; i++)
93 if (str[i] == '/')
a36b1725 94 return nfserr_badname;
1da177e4
LT		 95 return 0;
96}
97
1da177e4 98#define DECODE_HEAD \
2ebbc012 99 __be32 *p; \
b37ad28b 100 __be32 status
1da177e4
LT		 101#define DECODE_TAIL \
102 status = 0; \
103out: \
104 return status; \
105xdr_error: \
817cb9d4
CL		 106 dprintk("NFSD: xdr error (%s:%d)\n", \
107 __FILE__, __LINE__); \
1da177e4
LT		 108 status = nfserr_bad_xdr; \
109 goto out
110
1da177e4
LT		 111#define READMEM(x,nbytes) do { \
112 x = (char *)p; \
113 p += XDR_QUADLEN(nbytes); \
114} while (0)
115#define SAVEMEM(x,nbytes) do { \
116 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
117 savemem(argp, p, nbytes) : \
118 (char *)p)) { \
817cb9d4
CL		 119 dprintk("NFSD: xdr error (%s:%d)\n", \
120 __FILE__, __LINE__); \
1da177e4
LT		 121 goto xdr_error; \
122 } \
123 p += XDR_QUADLEN(nbytes); \
124} while (0)
125#define COPYMEM(x,nbytes) do { \
126 memcpy((x), p, nbytes); \
127 p += XDR_QUADLEN(nbytes); \
128} while (0)
129
130/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
131#define READ_BUF(nbytes) do { \
132 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
133 p = argp->p; \
134 argp->p += XDR_QUADLEN(nbytes); \
135 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 136 dprintk("NFSD: xdr error (%s:%d)\n", \
137 __FILE__, __LINE__); \
1da177e4
LT		 138 goto xdr_error; \
139 } \
140} while (0)
141
590b7431
BF		 142static void next_decode_page(struct nfsd4_compoundargs *argp)
143{
590b7431 144 argp->p = page_address(argp->pagelist[0]);
365da4ad 145 argp->pagelist++;
590b7431 146 if (argp->pagelen < PAGE_SIZE) {
fc788f64 147 argp->end = argp->p + XDR_QUADLEN(argp->pagelen);
590b7431
BF		 148 argp->pagelen = 0;
149 } else {
150 argp->end = argp->p + (PAGE_SIZE>>2);
151 argp->pagelen -= PAGE_SIZE;
152 }
153}
154
ca2a05aa 155static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 156{
157 /* We want more bytes than seem to be available.
158 * Maybe we need a new page, maybe we have just run out
159 */
ca2a05aa 160 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 161 __be32 *p;
eae03e2a
CL		 162
163 if (argp->pagelen == 0) {
164 struct kvec *vec = &argp->rqstp->rq_arg.tail[0];
165
166 if (!argp->tail) {
167 argp->tail = true;
168 avail = vec->iov_len;
169 argp->p = vec->iov_base;
170 argp->end = vec->iov_base + avail;
171 }
172
173 if (avail < nbytes)
174 return NULL;
175
176 p = argp->p;
177 argp->p += XDR_QUADLEN(nbytes);
178 return p;
179 }
180
1da177e4
LT		 181 if (avail + argp->pagelen < nbytes)
182 return NULL;
183 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
184 return NULL;
185 /* ok, we can do it with the current plus the next page */
186 if (nbytes <= sizeof(argp->tmp))
187 p = argp->tmp;
188 else {
f99d49ad 189 kfree(argp->tmpp);
1da177e4
LT		 190 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
191 if (!p)
192 return NULL;
193
194 }
ca2a05aa
BF		 195 /*
196 * The following memcpy is safe because read_buf is always
197 * called with nbytes > avail, and the two cases above both
198 * guarantee p points to at least nbytes bytes.
199 */
1da177e4 200 memcpy(p, argp->p, avail);
590b7431 201 next_decode_page(argp);
1da177e4
LT		 202 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
203 argp->p += XDR_QUADLEN(nbytes - avail);
204 return p;
205}
206
60adfc50
AA		 207static int zero_clientid(clientid_t *clid)
208{
209 return (clid->cl_boot == 0) && (clid->cl_id == 0);
210}
211
2d8498db 212/**
d5e23383 213 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
ce043ac8
BF		 214 * @argp: NFSv4 compound argument structure
215 * @p: pointer to be freed (with kfree())
2d8498db
CH		 216 *
217 * Marks @p to be freed when processing the compound operation
218 * described in @argp finishes.
219 */
d5e23383
BF		 220static void *
221svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
1da177e4 222{
d5e23383 223 struct svcxdr_tmpbuf *tb;
1da177e4 224
d5e23383 225 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
1da177e4 226 if (!tb)
d5e23383 227 return NULL;
1da177e4
LT		 228 tb->next = argp->to_free;
229 argp->to_free = tb;
d5e23383 230 return tb->buf;
1da177e4
LT		 231}
232
29c353b3
BF		 233/*
234 * For xdr strings that need to be passed to other kernel api's
235 * as null-terminated strings.
236 *
237 * Note null-terminating in place usually isn't safe since the
238 * buffer might end on a page boundary.
239 */
240static char *
241svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
242{
d5e23383 243 char *p = svcxdr_tmpalloc(argp, len + 1);
29c353b3
BF		 244
245 if (!p)
246 return NULL;
247 memcpy(p, buf, len);
248 p[len] = '\0';
29c353b3 249 return p;
1da177e4
LT		 250}
251
2d8498db
CH		 252/**
253 * savemem - duplicate a chunk of memory for later processing
254 * @argp: NFSv4 compound argument structure to be freed with
255 * @p: pointer to be duplicated
256 * @nbytes: length to be duplicated
257 *
258 * Returns a pointer to a copy of @nbytes bytes of memory at @p
259 * that are preserved until processing of the NFSv4 compound
260 * operation described by @argp finishes.
261 */
2ebbc012 262static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 263{
d5e23383
BF		 264 void *ret;
265
266 ret = svcxdr_tmpalloc(argp, nbytes);
267 if (!ret)
1da177e4 268 return NULL;
d5e23383
BF		 269 memcpy(ret, p, nbytes);
270 return ret;
1da177e4
LT		 271}
272
4c94e13e
CH		 273/*
274 * We require the high 32 bits of 'seconds' to be 0, and
275 * we ignore all 32 bits of 'nseconds'.
276 */
277static __be32
278nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
279{
280 DECODE_HEAD;
281 u64 sec;
282
283 READ_BUF(12);
284 p = xdr_decode_hyper(p, &sec);
285 tv->tv_sec = sec;
286 tv->tv_nsec = be32_to_cpup(p++);
287 if (tv->tv_nsec >= (u32)1000000000)
288 return nfserr_inval;
289
290 DECODE_TAIL;
291}
292
b37ad28b 293static __be32
1da177e4
LT		 294nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
295{
296 u32 bmlen;
297 DECODE_HEAD;
298
299 bmval[0] = 0;
300 bmval[1] = 0;
7e705706 301 bmval[2] = 0;
1da177e4
LT		 302
303 READ_BUF(4);
06553991 304 bmlen = be32_to_cpup(p++);
1da177e4
LT		 305 if (bmlen > 1000)
306 goto xdr_error;
307
308 READ_BUF(bmlen << 2);
309 if (bmlen > 0)
06553991 310 bmval[0] = be32_to_cpup(p++);
1da177e4 311 if (bmlen > 1)
06553991 312 bmval[1] = be32_to_cpup(p++);
7e705706 313 if (bmlen > 2)
06553991 314 bmval[2] = be32_to_cpup(p++);
1da177e4
LT		 315
316 DECODE_TAIL;
317}
318
b37ad28b 319static __be32
3c8e0316 320nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0 321 struct iattr *iattr, struct nfs4_acl **acl,
47057abd 322 struct xdr_netobj *label, int *umask)
1da177e4
LT		 323{
324 int expected_len, len = 0;
325 u32 dummy32;
326 char *buf;
327
328 DECODE_HEAD;
329 iattr->ia_valid = 0;
330 if ((status = nfsd4_decode_bitmap(argp, bmval)))
331 return status;
332
e864c189
BF		 333 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
334 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
335 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
336 if (nfsd_attrs_supported(argp->minorversion, bmval))
337 return nfserr_inval;
338 return nfserr_attrnotsupp;
339 }
340
1da177e4 341 READ_BUF(4);
06553991 342 expected_len = be32_to_cpup(p++);
1da177e4
LT		 343
344 if (bmval[0] & FATTR4_WORD0_SIZE) {
345 READ_BUF(8);
346 len += 8;
542d1ab3 347 p = xdr_decode_hyper(p, &iattr->ia_size);
1da177e4
LT		 348 iattr->ia_valid |= ATTR_SIZE;
349 }
350 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 351 u32 nace;
28e05dd8 352 struct nfs4_ace *ace;
1da177e4
LT		 353
354 READ_BUF(4); len += 4;
06553991 355 nace = be32_to_cpup(p++);
1da177e4 356
28e05dd8 357 if (nace > NFS4_ACL_MAX)
798df338 358 return nfserr_fbig;
28e05dd8 359
d5e23383 360 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
eba1c99c
KM		 361 if (*acl == NULL)
362 return nfserr_jukebox;
363
28e05dd8
BF		 364 (*acl)->naces = nace;
365 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 366 READ_BUF(16); len += 16;
06553991
BF		 367 ace->type = be32_to_cpup(p++);
368 ace->flag = be32_to_cpup(p++);
369 ace->access_mask = be32_to_cpup(p++);
370 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 371 READ_BUF(dummy32);
372 len += XDR_QUADLEN(dummy32) << 2;
373 READMEM(buf, dummy32);
28e05dd8 374 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 375 status = nfs_ok;
28e05dd8 376 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 377 ;
28e05dd8 378 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 379 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 380 buf, dummy32, &ace->who_gid);
1da177e4 381 else
3c726023 382 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 383 buf, dummy32, &ace->who_uid);
3c726023
BF		 384 if (status)
385 return status;
1da177e4
LT		 386 }
387 } else
388 *acl = NULL;
389 if (bmval[1] & FATTR4_WORD1_MODE) {
390 READ_BUF(4);
391 len += 4;
06553991 392 iattr->ia_mode = be32_to_cpup(p++);
1da177e4
LT		 393 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
394 iattr->ia_valid |= ATTR_MODE;
395 }
396 if (bmval[1] & FATTR4_WORD1_OWNER) {
397 READ_BUF(4);
398 len += 4;
06553991 399 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 400 READ_BUF(dummy32);
401 len += (XDR_QUADLEN(dummy32) << 2);
402 READMEM(buf, dummy32);
47c85291
N		 403 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
404 return status;
1da177e4
LT		 405 iattr->ia_valid |= ATTR_UID;
406 }
407 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
408 READ_BUF(4);
409 len += 4;
06553991 410 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 411 READ_BUF(dummy32);
412 len += (XDR_QUADLEN(dummy32) << 2);
413 READMEM(buf, dummy32);
47c85291
N		 414 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
415 return status;
1da177e4
LT		 416 iattr->ia_valid |= ATTR_GID;
417 }
418 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
419 READ_BUF(4);
420 len += 4;
06553991 421 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 422 switch (dummy32) {
423 case NFS4_SET_TO_CLIENT_TIME:
1da177e4 424 len += 12;
4c94e13e
CH		 425 status = nfsd4_decode_time(argp, &iattr->ia_atime);
426 if (status)
427 return status;
1da177e4
LT		 428 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
429 break;
430 case NFS4_SET_TO_SERVER_TIME:
431 iattr->ia_valid |= ATTR_ATIME;
432 break;
433 default:
434 goto xdr_error;
435 }
436 }
1da177e4
LT		 437 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
438 READ_BUF(4);
439 len += 4;
06553991 440 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 441 switch (dummy32) {
442 case NFS4_SET_TO_CLIENT_TIME:
1da177e4 443 len += 12;
4c94e13e
CH		 444 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
445 if (status)
446 return status;
1da177e4
LT		 447 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
448 break;
449 case NFS4_SET_TO_SERVER_TIME:
450 iattr->ia_valid |= ATTR_MTIME;
451 break;
452 default:
453 goto xdr_error;
454 }
455 }
18032ca0
DQ		 456
457 label->len = 0;
458#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
459 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
460 READ_BUF(4);
461 len += 4;
06553991 462 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
18032ca0
DQ		 463 READ_BUF(4);
464 len += 4;
06553991 465 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
18032ca0
DQ		 466 READ_BUF(4);
467 len += 4;
06553991 468 dummy32 = be32_to_cpup(p++);
18032ca0 469 READ_BUF(dummy32);
1ec8c0c4 470 if (dummy32 > NFS4_MAXLABELLEN)
18032ca0
DQ		 471 return nfserr_badlabel;
472 len += (XDR_QUADLEN(dummy32) << 2);
473 READMEM(buf, dummy32);
29c353b3
BF		 474 label->len = dummy32;
475 label->data = svcxdr_dupstr(argp, buf, dummy32);
18032ca0
DQ		 476 if (!label->data)
477 return nfserr_jukebox;
18032ca0
DQ		 478 }
479#endif
47057abd
AG		 480 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
481 if (!umask)
482 goto xdr_error;
483 READ_BUF(8);
484 len += 8;
485 dummy32 = be32_to_cpup(p++);
486 iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO);
487 dummy32 = be32_to_cpup(p++);
488 *umask = dummy32 & S_IRWXUGO;
489 iattr->ia_valid |= ATTR_MODE;
490 }
e864c189 491 if (len != expected_len)
1da177e4
LT		 492 goto xdr_error;
493
494 DECODE_TAIL;
1da177e4
LT		 495}
496
e31a1b66
BH		 497static __be32
498nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
499{
500 DECODE_HEAD;
501
502 READ_BUF(sizeof(stateid_t));
06553991 503 sid->si_generation = be32_to_cpup(p++);
e31a1b66
BH		 504 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
505
506 DECODE_TAIL;
507}
508
b37ad28b 509static __be32
1da177e4
LT		 510nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
511{
512 DECODE_HEAD;
513
514 READ_BUF(4);
06553991 515 access->ac_req_access = be32_to_cpup(p++);
1da177e4
LT		 516
517 DECODE_TAIL;
518}
519
acb2887e
BF		 520static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
521{
522 DECODE_HEAD;
12fc3e92 523 u32 dummy, uid, gid;
acb2887e
BF		 524 char *machine_name;
525 int i;
526 int nr_secflavs;
527
528 /* callback_sec_params4 */
529 READ_BUF(4);
06553991 530 nr_secflavs = be32_to_cpup(p++);
57569a70
BF		 531 if (nr_secflavs)
532 cbs->flavor = (u32)(-1);
533 else
534 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
535 cbs->flavor = 0;
acb2887e
BF		 536 for (i = 0; i < nr_secflavs; ++i) {
537 READ_BUF(4);
06553991 538 dummy = be32_to_cpup(p++);
acb2887e
BF		 539 switch (dummy) {
540 case RPC_AUTH_NULL:
541 /* Nothing to read */
12fc3e92
BF		 542 if (cbs->flavor == (u32)(-1))
543 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 544 break;
545 case RPC_AUTH_UNIX:
546 READ_BUF(8);
547 /* stamp */
06553991 548 dummy = be32_to_cpup(p++);
acb2887e
BF		 549
550 /* machine name */
06553991 551 dummy = be32_to_cpup(p++);
acb2887e
BF		 552 READ_BUF(dummy);
553 SAVEMEM(machine_name, dummy);
554
555 /* uid, gid */
556 READ_BUF(8);
06553991
BF		 557 uid = be32_to_cpup(p++);
558 gid = be32_to_cpup(p++);
acb2887e
BF		 559
560 /* more gids */
561 READ_BUF(4);
06553991 562 dummy = be32_to_cpup(p++);
acb2887e 563 READ_BUF(dummy * 4);
12fc3e92 564 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 565 kuid_t kuid = make_kuid(&init_user_ns, uid);
566 kgid_t kgid = make_kgid(&init_user_ns, gid);
567 if (uid_valid(kuid) && gid_valid(kgid)) {
568 cbs->uid = kuid;
569 cbs->gid = kgid;
570 cbs->flavor = RPC_AUTH_UNIX;
571 } else {
572 dprintk("RPC_AUTH_UNIX with invalid"
573 "uid or gid ignoring!\n");
574 }
12fc3e92 575 }
acb2887e
BF		 576 break;
577 case RPC_AUTH_GSS:
578 dprintk("RPC_AUTH_GSS callback secflavor "
579 "not supported!\n");
580 READ_BUF(8);
581 /* gcbp_service */
06553991 582 dummy = be32_to_cpup(p++);
acb2887e 583 /* gcbp_handle_from_server */
06553991 584 dummy = be32_to_cpup(p++);
acb2887e
BF		 585 READ_BUF(dummy);
586 p += XDR_QUADLEN(dummy);
587 /* gcbp_handle_from_client */
588 READ_BUF(4);
06553991 589 dummy = be32_to_cpup(p++);
acb2887e
BF		 590 READ_BUF(dummy);
591 break;
592 default:
593 dprintk("Illegal callback secflavor\n");
594 return nfserr_inval;
595 }
596 }
597 DECODE_TAIL;
598}
599
cb73a9f4
BF		 600static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
601{
602 DECODE_HEAD;
603
604 READ_BUF(4);
06553991 605 bc->bc_cb_program = be32_to_cpup(p++);
cb73a9f4
BF		 606 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
607
608 DECODE_TAIL;
609}
610
1d1bc8f2
BF		 611static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
612{
613 DECODE_HEAD;
1d1bc8f2
BF		 614
615 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
616 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991 617 bcts->dir = be32_to_cpup(p++);
6ce2357f
BS		 618 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
619 * could help us figure out we should be using it. */
1d1bc8f2
BF		 620 DECODE_TAIL;
621}
622
b37ad28b 623static __be32
1da177e4
LT		 624nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
625{
626 DECODE_HEAD;
627
e31a1b66 628 READ_BUF(4);
06553991 629 close->cl_seqid = be32_to_cpup(p++);
e31a1b66 630 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 631
632 DECODE_TAIL;
633}
634
635
b37ad28b 636static __be32
1da177e4
LT		 637nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
638{
639 DECODE_HEAD;
640
641 READ_BUF(12);
542d1ab3 642 p = xdr_decode_hyper(p, &commit->co_offset);
06553991 643 commit->co_count = be32_to_cpup(p++);
1da177e4
LT		 644
645 DECODE_TAIL;
646}
647
b37ad28b 648static __be32
1da177e4
LT		 649nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
650{
651 DECODE_HEAD;
652
653 READ_BUF(4);
06553991 654 create->cr_type = be32_to_cpup(p++);
1da177e4
LT		 655 switch (create->cr_type) {
656 case NF4LNK:
657 READ_BUF(4);
7fb84306
BF		 658 create->cr_datalen = be32_to_cpup(p++);
659 READ_BUF(create->cr_datalen);
29c353b3 660 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
7fb84306 661 if (!create->cr_data)
76f47128 662 return nfserr_jukebox;
1da177e4
LT		 663 break;
664 case NF4BLK:
665 case NF4CHR:
666 READ_BUF(8);
06553991
BF		 667 create->cr_specdata1 = be32_to_cpup(p++);
668 create->cr_specdata2 = be32_to_cpup(p++);
1da177e4
LT		 669 break;
670 case NF4SOCK:
671 case NF4FIFO:
672 case NF4DIR:
673 default:
674 break;
675 }
676
677 READ_BUF(4);
06553991 678 create->cr_namelen = be32_to_cpup(p++);
1da177e4
LT		 679 READ_BUF(create->cr_namelen);
680 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 681 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 682 return status;
683
3c8e0316 684 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
47057abd
AG		 685 &create->cr_acl, &create->cr_label,
686 &current->fs->umask);
c0d6fc8a 687 if (status)
1da177e4
LT		 688 goto out;
689
690 DECODE_TAIL;
691}
692
b37ad28b 693static inline __be32
1da177e4
LT		 694nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
695{
e31a1b66 696 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 697}
698
b37ad28b 699static inline __be32
1da177e4
LT		 700nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
701{
702 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
703}
704
b37ad28b 705static __be32
1da177e4
LT		 706nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
707{
708 DECODE_HEAD;
709
710 READ_BUF(4);
06553991 711 link->li_namelen = be32_to_cpup(p++);
1da177e4
LT		 712 READ_BUF(link->li_namelen);
713 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 714 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 715 return status;
716
717 DECODE_TAIL;
718}
719
b37ad28b 720static __be32
1da177e4
LT		 721nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
722{
723 DECODE_HEAD;
724
1da177e4
LT		 725 /*
726 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
727 */
728 READ_BUF(28);
06553991 729 lock->lk_type = be32_to_cpup(p++);
1da177e4
LT		 730 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
731 goto xdr_error;
06553991 732 lock->lk_reclaim = be32_to_cpup(p++);
542d1ab3
BF		 733 p = xdr_decode_hyper(p, &lock->lk_offset);
734 p = xdr_decode_hyper(p, &lock->lk_length);
06553991 735 lock->lk_is_new = be32_to_cpup(p++);
1da177e4
LT		 736
737 if (lock->lk_is_new) {
e31a1b66 738 READ_BUF(4);
06553991 739 lock->lk_new_open_seqid = be32_to_cpup(p++);
e31a1b66
BH		 740 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
741 if (status)
742 return status;
743 READ_BUF(8 + sizeof(clientid_t));
06553991 744 lock->lk_new_lock_seqid = be32_to_cpup(p++);
1da177e4 745 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
06553991 746 lock->lk_new_owner.len = be32_to_cpup(p++);
1da177e4
LT		 747 READ_BUF(lock->lk_new_owner.len);
748 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
749 } else {
e31a1b66
BH		 750 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
751 if (status)
752 return status;
753 READ_BUF(4);
06553991 754 lock->lk_old_lock_seqid = be32_to_cpup(p++);
1da177e4
LT		 755 }
756
757 DECODE_TAIL;
758}
759
b37ad28b 760static __be32
1da177e4
LT		 761nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
762{
763 DECODE_HEAD;
764
765 READ_BUF(32);
06553991 766 lockt->lt_type = be32_to_cpup(p++);
1da177e4
LT		 767 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
768 goto xdr_error;
542d1ab3
BF		 769 p = xdr_decode_hyper(p, &lockt->lt_offset);
770 p = xdr_decode_hyper(p, &lockt->lt_length);
1da177e4 771 COPYMEM(&lockt->lt_clientid, 8);
06553991 772 lockt->lt_owner.len = be32_to_cpup(p++);
1da177e4
LT		 773 READ_BUF(lockt->lt_owner.len);
774 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
775
776 DECODE_TAIL;
777}
778
b37ad28b 779static __be32
1da177e4
LT		 780nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
781{
782 DECODE_HEAD;
783
e31a1b66 784 READ_BUF(8);
06553991 785 locku->lu_type = be32_to_cpup(p++);
1da177e4
LT		 786 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
787 goto xdr_error;
06553991 788 locku->lu_seqid = be32_to_cpup(p++);
e31a1b66
BH		 789 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
790 if (status)
791 return status;
792 READ_BUF(16);
542d1ab3
BF		 793 p = xdr_decode_hyper(p, &locku->lu_offset);
794 p = xdr_decode_hyper(p, &locku->lu_length);
1da177e4
LT		 795
796 DECODE_TAIL;
797}
798
b37ad28b 799static __be32
1da177e4
LT		 800nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
801{
802 DECODE_HEAD;
803
804 READ_BUF(4);
06553991 805 lookup->lo_len = be32_to_cpup(p++);
1da177e4
LT		 806 READ_BUF(lookup->lo_len);
807 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 808 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 809 return status;
810
811 DECODE_TAIL;
812}
813
2c8bd7e0 814static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 815{
816 __be32 *p;
817 u32 w;
818
819 READ_BUF(4);
06553991 820 w = be32_to_cpup(p++);
2c8bd7e0
BH		 821 *share_access = w & NFS4_SHARE_ACCESS_MASK;
822 *deleg_want = w & NFS4_SHARE_WANT_MASK;
823 if (deleg_when)
824 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
825
04f9e664
BF		 826 switch (w & NFS4_SHARE_ACCESS_MASK) {
827 case NFS4_SHARE_ACCESS_READ:
828 case NFS4_SHARE_ACCESS_WRITE:
829 case NFS4_SHARE_ACCESS_BOTH:
830 break;
831 default:
832 return nfserr_bad_xdr;
833 }
fc0d14fe 834 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 835 if (!w)
836 return nfs_ok;
837 if (!argp->minorversion)
838 return nfserr_bad_xdr;
839 switch (w & NFS4_SHARE_WANT_MASK) {
840 case NFS4_SHARE_WANT_NO_PREFERENCE:
841 case NFS4_SHARE_WANT_READ_DELEG:
842 case NFS4_SHARE_WANT_WRITE_DELEG:
843 case NFS4_SHARE_WANT_ANY_DELEG:
844 case NFS4_SHARE_WANT_NO_DELEG:
845 case NFS4_SHARE_WANT_CANCEL:
846 break;
847 default:
848 return nfserr_bad_xdr;
849 }
92bac8c5 850 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 851 if (!w)
852 return nfs_ok;
2c8bd7e0
BH		 853
854 if (!deleg_when) /* open_downgrade */
855 return nfserr_inval;
04f9e664
BF		 856 switch (w) {
857 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
858 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 859 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
860 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 861 return nfs_ok;
862 }
863xdr_error:
864 return nfserr_bad_xdr;
865}
866
867static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
868{
869 __be32 *p;
870
871 READ_BUF(4);
06553991 872 *x = be32_to_cpup(p++);
04f9e664 873 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 874 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 875 return nfserr_bad_xdr;
876 return nfs_ok;
877xdr_error:
878 return nfserr_bad_xdr;
879}
880
a084daf5
BF		 881static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
882{
883 __be32 *p;
884
885 READ_BUF(4);
06553991 886 o->len = be32_to_cpup(p++);
a084daf5
BF		 887
888 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
889 return nfserr_bad_xdr;
890
891 READ_BUF(o->len);
892 SAVEMEM(o->data, o->len);
893 return nfs_ok;
894xdr_error:
895 return nfserr_bad_xdr;
896}
897
b37ad28b 898static __be32
1da177e4
LT		 899nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
900{
901 DECODE_HEAD;
2c8bd7e0 902 u32 dummy;
1da177e4
LT		 903
904 memset(open->op_bmval, 0, sizeof(open->op_bmval));
905 open->op_iattr.ia_valid = 0;
fe0750e5 906 open->op_openowner = NULL;
1da177e4 907
9d313b17 908 open->op_xdr_error = 0;
1da177e4 909 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 910 READ_BUF(4);
06553991 911 open->op_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 912 /* decode, yet ignore deleg_when until supported */
913 status = nfsd4_decode_share_access(argp, &open->op_share_access,
914 &open->op_deleg_want, &dummy);
04f9e664
BF		 915 if (status)
916 goto xdr_error;
917 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
918 if (status)
919 goto xdr_error;
a084daf5 920 READ_BUF(sizeof(clientid_t));
1da177e4 921 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 922 status = nfsd4_decode_opaque(argp, &open->op_owner);
923 if (status)
924 goto xdr_error;
925 READ_BUF(4);
06553991 926 open->op_create = be32_to_cpup(p++);
1da177e4
LT		 927 switch (open->op_create) {
928 case NFS4_OPEN_NOCREATE:
929 break;
930 case NFS4_OPEN_CREATE:
47057abd 931 current->fs->umask = 0;
1da177e4 932 READ_BUF(4);
06553991 933 open->op_createmode = be32_to_cpup(p++);
1da177e4
LT		 934 switch (open->op_createmode) {
935 case NFS4_CREATE_UNCHECKED:
936 case NFS4_CREATE_GUARDED:
c0d6fc8a 937 status = nfsd4_decode_fattr(argp, open->op_bmval,
47057abd
AG		 938 &open->op_iattr, &open->op_acl, &open->op_label,
939 &current->fs->umask);
c0d6fc8a 940 if (status)
1da177e4
LT		 941 goto out;
942 break;
943 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 944 READ_BUF(NFS4_VERIFIER_SIZE);
945 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 946 break;
79fb54ab
BH		 947 case NFS4_CREATE_EXCLUSIVE4_1:
948 if (argp->minorversion < 1)
949 goto xdr_error;
ab4684d1
CL		 950 READ_BUF(NFS4_VERIFIER_SIZE);
951 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 952 status = nfsd4_decode_fattr(argp, open->op_bmval,
47057abd
AG		 953 &open->op_iattr, &open->op_acl, &open->op_label,
954 &current->fs->umask);
79fb54ab
BH		 955 if (status)
956 goto out;
957 break;
1da177e4
LT		 958 default:
959 goto xdr_error;
960 }
961 break;
962 default:
963 goto xdr_error;
964 }
965
966 /* open_claim */
967 READ_BUF(4);
06553991 968 open->op_claim_type = be32_to_cpup(p++);
1da177e4
LT		 969 switch (open->op_claim_type) {
970 case NFS4_OPEN_CLAIM_NULL:
971 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
972 READ_BUF(4);
06553991 973 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 974 READ_BUF(open->op_fname.len);
975 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 976 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 977 return status;
978 break;
979 case NFS4_OPEN_CLAIM_PREVIOUS:
980 READ_BUF(4);
06553991 981 open->op_delegate_type = be32_to_cpup(p++);
1da177e4
LT		 982 break;
983 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 984 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
985 if (status)
986 return status;
987 READ_BUF(4);
06553991 988 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 989 READ_BUF(open->op_fname.len);
990 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 991 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 992 return status;
993 break;
8b289b2c
BF		 994 case NFS4_OPEN_CLAIM_FH:
995 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
996 if (argp->minorversion < 1)
997 goto xdr_error;
998 /* void */
999 break;
1000 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1001 if (argp->minorversion < 1)
1002 goto xdr_error;
1003 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
1004 if (status)
1005 return status;
1006 break;
1da177e4
LT		 1007 default:
1008 goto xdr_error;
1009 }
1010
1011 DECODE_TAIL;
1012}
1013
b37ad28b 1014static __be32
1da177e4
LT		 1015nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1016{
1017 DECODE_HEAD;
e1a90ebd
AS		 1018
1019 if (argp->minorversion >= 1)
1020 return nfserr_notsupp;
1021
e31a1b66
BH		 1022 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
1023 if (status)
1024 return status;
1025 READ_BUF(4);
06553991 1026 open_conf->oc_seqid = be32_to_cpup(p++);
e1a90ebd 1027
1da177e4
LT		 1028 DECODE_TAIL;
1029}
1030
b37ad28b 1031static __be32
1da177e4
LT		 1032nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1033{
1034 DECODE_HEAD;
1035
e31a1b66
BH		 1036 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
1037 if (status)
1038 return status;
04f9e664 1039 READ_BUF(4);
06553991 1040 open_down->od_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 1041 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1042 &open_down->od_deleg_want, NULL);
04f9e664
BF		 1043 if (status)
1044 return status;
1045 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1046 if (status)
1047 return status;
1da177e4
LT		 1048 DECODE_TAIL;
1049}
1050
b37ad28b 1051static __be32
1da177e4
LT		 1052nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1053{
1054 DECODE_HEAD;
1055
1056 READ_BUF(4);
06553991 1057 putfh->pf_fhlen = be32_to_cpup(p++);
1da177e4
LT		 1058 if (putfh->pf_fhlen > NFS4_FHSIZE)
1059 goto xdr_error;
1060 READ_BUF(putfh->pf_fhlen);
1061 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1062
1063 DECODE_TAIL;
1064}
1065
e1a90ebd
AS		 1066static __be32
1067nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1068{
1069 if (argp->minorversion == 0)
1070 return nfs_ok;
1071 return nfserr_notsupp;
1072}
1073
b37ad28b 1074static __be32
1da177e4
LT		 1075nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1076{
1077 DECODE_HEAD;
1078
e31a1b66
BH		 1079 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1080 if (status)
1081 return status;
1082 READ_BUF(12);
542d1ab3 1083 p = xdr_decode_hyper(p, &read->rd_offset);
06553991 1084 read->rd_length = be32_to_cpup(p++);
1da177e4
LT		 1085
1086 DECODE_TAIL;
1087}
1088
b37ad28b 1089static __be32
1da177e4
LT		 1090nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1091{
1092 DECODE_HEAD;
1093
1094 READ_BUF(24);
542d1ab3 1095 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1da177e4 1096 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
06553991
BF		 1097 readdir->rd_dircount = be32_to_cpup(p++);
1098 readdir->rd_maxcount = be32_to_cpup(p++);
1da177e4
LT		 1099 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1100 goto out;
1101
1102 DECODE_TAIL;
1103}
1104
b37ad28b 1105static __be32
1da177e4
LT		 1106nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1107{
1108 DECODE_HEAD;
1109
1110 READ_BUF(4);
06553991 1111 remove->rm_namelen = be32_to_cpup(p++);
1da177e4
LT		 1112 READ_BUF(remove->rm_namelen);
1113 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1114 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1115 return status;
1116
1117 DECODE_TAIL;
1118}
1119
b37ad28b 1120static __be32
1da177e4
LT		 1121nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1122{
1123 DECODE_HEAD;
1124
1125 READ_BUF(4);
06553991 1126 rename->rn_snamelen = be32_to_cpup(p++);
4aed9c46 1127 READ_BUF(rename->rn_snamelen);
1da177e4 1128 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
4aed9c46 1129 READ_BUF(4);
06553991 1130 rename->rn_tnamelen = be32_to_cpup(p++);
1da177e4
LT		 1131 READ_BUF(rename->rn_tnamelen);
1132 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1133 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1134 return status;
a36b1725 1135 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1136 return status;
1137
1138 DECODE_TAIL;
1139}
1140
b37ad28b 1141static __be32
1da177e4
LT		 1142nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1143{
1144 DECODE_HEAD;
1145
e1a90ebd
AS		 1146 if (argp->minorversion >= 1)
1147 return nfserr_notsupp;
1148
1da177e4
LT		 1149 READ_BUF(sizeof(clientid_t));
1150 COPYMEM(clientid, sizeof(clientid_t));
1151
1152 DECODE_TAIL;
1153}
1154
dcb488a3
AA		 1155static __be32
1156nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1157 struct nfsd4_secinfo *secinfo)
1158{
1159 DECODE_HEAD;
1160
1161 READ_BUF(4);
06553991 1162 secinfo->si_namelen = be32_to_cpup(p++);
dcb488a3
AA		 1163 READ_BUF(secinfo->si_namelen);
1164 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1165 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1166 if (status)
1167 return status;
1168 DECODE_TAIL;
1169}
1170
04f4ad16
BF		 1171static __be32
1172nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1173 struct nfsd4_secinfo_no_name *sin)
1174{
1175 DECODE_HEAD;
1176
1177 READ_BUF(4);
06553991 1178 sin->sin_style = be32_to_cpup(p++);
04f4ad16
BF		 1179 DECODE_TAIL;
1180}
1181
b37ad28b 1182static __be32
1da177e4
LT		 1183nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1184{
e31a1b66 1185 __be32 status;
1da177e4 1186
e31a1b66
BH		 1187 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1188 if (status)
1189 return status;
3c8e0316 1190 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
47057abd 1191 &setattr->sa_acl, &setattr->sa_label, NULL);
1da177e4
LT		 1192}
1193
b37ad28b 1194static __be32
1da177e4
LT		 1195nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1196{
1197 DECODE_HEAD;
1198
e1a90ebd
AS		 1199 if (argp->minorversion >= 1)
1200 return nfserr_notsupp;
1201
ab4684d1
CL		 1202 READ_BUF(NFS4_VERIFIER_SIZE);
1203 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1204
a084daf5
BF		 1205 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1206 if (status)
1207 return nfserr_bad_xdr;
1208 READ_BUF(8);
06553991
BF		 1209 setclientid->se_callback_prog = be32_to_cpup(p++);
1210 setclientid->se_callback_netid_len = be32_to_cpup(p++);
4aed9c46 1211 READ_BUF(setclientid->se_callback_netid_len);
1da177e4 1212 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
4aed9c46 1213 READ_BUF(4);
06553991 1214 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1da177e4 1215
4aed9c46 1216 READ_BUF(setclientid->se_callback_addr_len);
1da177e4 1217 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
4aed9c46 1218 READ_BUF(4);
06553991 1219 setclientid->se_callback_ident = be32_to_cpup(p++);
1da177e4
LT		 1220
1221 DECODE_TAIL;
1222}
1223
b37ad28b 1224static __be32
1da177e4
LT		 1225nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1226{
1227 DECODE_HEAD;
1228
e1a90ebd
AS		 1229 if (argp->minorversion >= 1)
1230 return nfserr_notsupp;
1231
ab4684d1 1232 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1233 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1234 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1235
1236 DECODE_TAIL;
1237}
1238
1239/* Also used for NVERIFY */
b37ad28b 1240static __be32
1da177e4
LT		 1241nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1242{
1da177e4
LT		 1243 DECODE_HEAD;
1244
1245 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1246 goto out;
1247
1248 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1249 * nfsd4_proc_verify */
1250
1da177e4 1251 READ_BUF(4);
06553991 1252 verify->ve_attrlen = be32_to_cpup(p++);
1da177e4
LT		 1253 READ_BUF(verify->ve_attrlen);
1254 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1255
1256 DECODE_TAIL;
1257}
1258
b37ad28b 1259static __be32
1da177e4
LT		 1260nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1261{
1262 int avail;
1da177e4
LT		 1263 int len;
1264 DECODE_HEAD;
1265
e31a1b66
BH		 1266 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1267 if (status)
1268 return status;
1269 READ_BUF(16);
542d1ab3 1270 p = xdr_decode_hyper(p, &write->wr_offset);
06553991 1271 write->wr_stable_how = be32_to_cpup(p++);
54bbb7d2 1272 if (write->wr_stable_how > NFS_FILE_SYNC)
1da177e4 1273 goto xdr_error;
06553991 1274 write->wr_buflen = be32_to_cpup(p++);
1da177e4
LT		 1275
1276 /* Sorry .. no magic macros for this.. *
1277 * READ_BUF(write->wr_buflen);
1278 * SAVEMEM(write->wr_buf, write->wr_buflen);
1279 */
1280 avail = (char*)argp->end - (char*)argp->p;
1281 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1282 dprintk("NFSD: xdr error (%s:%d)\n",
1283 __FILE__, __LINE__);
1da177e4
LT		 1284 goto xdr_error;
1285 }
70cc7f75
BF		 1286 write->wr_head.iov_base = p;
1287 write->wr_head.iov_len = avail;
70cc7f75 1288 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1289
1290 len = XDR_QUADLEN(write->wr_buflen) << 2;
1291 if (len >= avail) {
1292 int pages;
1293
1294 len -= avail;
1295
1296 pages = len >> PAGE_SHIFT;
1297 argp->pagelist += pages;
1298 argp->pagelen -= pages * PAGE_SIZE;
1299 len -= pages * PAGE_SIZE;
1300
fc788f64 1301 next_decode_page(argp);
1da177e4 1302 }
5a80a54d 1303 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1304
1305 DECODE_TAIL;
1306}
1307
b37ad28b 1308static __be32
1da177e4
LT		 1309nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1310{
1311 DECODE_HEAD;
1312
e1a90ebd
AS		 1313 if (argp->minorversion >= 1)
1314 return nfserr_notsupp;
1315
1da177e4
LT		 1316 READ_BUF(12);
1317 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
06553991 1318 rlockowner->rl_owner.len = be32_to_cpup(p++);
1da177e4
LT		 1319 READ_BUF(rlockowner->rl_owner.len);
1320 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1321
60adfc50
AA		 1322 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1323 return nfserr_inval;
1da177e4
LT		 1324 DECODE_TAIL;
1325}
1326
2db134eb
AA		 1327static __be32
1328nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1329 struct nfsd4_exchange_id *exid)
2db134eb 1330{
5afa040b 1331 int dummy, tmp;
0733d213
AA		 1332 DECODE_HEAD;
1333
1334 READ_BUF(NFS4_VERIFIER_SIZE);
1335 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1336
a084daf5
BF		 1337 status = nfsd4_decode_opaque(argp, &exid->clname);
1338 if (status)
1339 return nfserr_bad_xdr;
0733d213
AA		 1340
1341 READ_BUF(4);
06553991 1342 exid->flags = be32_to_cpup(p++);
0733d213
AA		 1343
1344 /* Ignore state_protect4_a */
1345 READ_BUF(4);
06553991 1346 exid->spa_how = be32_to_cpup(p++);
0733d213
AA		 1347 switch (exid->spa_how) {
1348 case SP4_NONE:
1349 break;
1350 case SP4_MACH_CRED:
1351 /* spo_must_enforce */
ed941643
AE		 1352 status = nfsd4_decode_bitmap(argp,
1353 exid->spo_must_enforce);
1354 if (status)
1355 goto out;
0733d213 1356 /* spo_must_allow */
ed941643
AE		 1357 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
1358 if (status)
1359 goto out;
0733d213
AA		 1360 break;
1361 case SP4_SSV:
1362 /* ssp_ops */
1363 READ_BUF(4);
06553991 1364 dummy = be32_to_cpup(p++);
0733d213
AA		 1365 READ_BUF(dummy * 4);
1366 p += dummy;
1367
1368 READ_BUF(4);
06553991 1369 dummy = be32_to_cpup(p++);
0733d213
AA		 1370 READ_BUF(dummy * 4);
1371 p += dummy;
1372
1373 /* ssp_hash_algs<> */
1374 READ_BUF(4);
06553991 1375 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1376 while (tmp--) {
1377 READ_BUF(4);
06553991 1378 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1379 READ_BUF(dummy);
1380 p += XDR_QUADLEN(dummy);
1381 }
0733d213
AA		 1382
1383 /* ssp_encr_algs<> */
1384 READ_BUF(4);
06553991 1385 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1386 while (tmp--) {
1387 READ_BUF(4);
06553991 1388 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1389 READ_BUF(dummy);
1390 p += XDR_QUADLEN(dummy);
1391 }
0733d213
AA		 1392
1393 /* ssp_window and ssp_num_gss_handles */
1394 READ_BUF(8);
06553991
BF		 1395 dummy = be32_to_cpup(p++);
1396 dummy = be32_to_cpup(p++);
0733d213
AA		 1397 break;
1398 default:
1399 goto xdr_error;
1400 }
1401
1402 /* Ignore Implementation ID */
1403 READ_BUF(4); /* nfs_impl_id4 array length */
06553991 1404 dummy = be32_to_cpup(p++);
0733d213
AA		 1405
1406 if (dummy > 1)
1407 goto xdr_error;
1408
1409 if (dummy == 1) {
1410 /* nii_domain */
1411 READ_BUF(4);
06553991 1412 dummy = be32_to_cpup(p++);
0733d213
AA		 1413 READ_BUF(dummy);
1414 p += XDR_QUADLEN(dummy);
1415
1416 /* nii_name */
1417 READ_BUF(4);
06553991 1418 dummy = be32_to_cpup(p++);
0733d213
AA		 1419 READ_BUF(dummy);
1420 p += XDR_QUADLEN(dummy);
1421
1422 /* nii_date */
1423 READ_BUF(12);
1424 p += 3;
1425 }
1426 DECODE_TAIL;
2db134eb
AA		 1427}
1428
1429static __be32
1430nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1431 struct nfsd4_create_session *sess)
1432{
ec6b5d7b 1433 DECODE_HEAD;
ec6b5d7b 1434 u32 dummy;
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);
06553991
BF		 1443 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
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);
06553991
BF		 1460 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
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) {
1591 READ_BUF(4 * num);
1592 gdev->gd_notify_types = be32_to_cpup(p++);
1593 for (i = 1; i < num; i++) {
1594 if (be32_to_cpup(p++)) {
1595 status = nfserr_inval;
1596 goto out;
1597 }
1598 }
1599 }
1600 DECODE_TAIL;
1601}
1602
1603static __be32
1604nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1605 struct nfsd4_layoutget *lgp)
1606{
1607 DECODE_HEAD;
1608
1609 READ_BUF(36);
1610 lgp->lg_signal = be32_to_cpup(p++);
1611 lgp->lg_layout_type = be32_to_cpup(p++);
1612 lgp->lg_seg.iomode = be32_to_cpup(p++);
1613 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1614 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1615 p = xdr_decode_hyper(p, &lgp->lg_minlength);
db59c0ef
KM		 1616
1617 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1618 if (status)
1619 return status;
1620
9cf514cc
CH		 1621 READ_BUF(4);
1622 lgp->lg_maxcount = be32_to_cpup(p++);
1623
1624 DECODE_TAIL;
1625}
1626
1627static __be32
1628nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1629 struct nfsd4_layoutcommit *lcp)
1630{
1631 DECODE_HEAD;
1632 u32 timechange;
1633
1634 READ_BUF(20);
1635 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1636 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1637 lcp->lc_reclaim = be32_to_cpup(p++);
db59c0ef
KM		 1638
1639 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1640 if (status)
1641 return status;
1642
9cf514cc
CH		 1643 READ_BUF(4);
1644 lcp->lc_newoffset = be32_to_cpup(p++);
1645 if (lcp->lc_newoffset) {
1646 READ_BUF(8);
1647 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1648 } else
1649 lcp->lc_last_wr = 0;
1650 READ_BUF(4);
1651 timechange = be32_to_cpup(p++);
1652 if (timechange) {
1653 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1654 if (status)
1655 return status;
1656 } else {
1657 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1658 }
1659 READ_BUF(8);
1660 lcp->lc_layout_type = be32_to_cpup(p++);
1661
1662 /*
1663 * Save the layout update in XDR format and let the layout driver deal
1664 * with it later.
1665 */
1666 lcp->lc_up_len = be32_to_cpup(p++);
1667 if (lcp->lc_up_len > 0) {
1668 READ_BUF(lcp->lc_up_len);
1669 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1670 }
1671
1672 DECODE_TAIL;
1673}
1674
1675static __be32
1676nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1677 struct nfsd4_layoutreturn *lrp)
1678{
1679 DECODE_HEAD;
1680
1681 READ_BUF(16);
1682 lrp->lr_reclaim = be32_to_cpup(p++);
1683 lrp->lr_layout_type = be32_to_cpup(p++);
1684 lrp->lr_seg.iomode = be32_to_cpup(p++);
1685 lrp->lr_return_type = be32_to_cpup(p++);
1686 if (lrp->lr_return_type == RETURN_FILE) {
1687 READ_BUF(16);
1688 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1689 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
db59c0ef
KM		 1690
1691 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1692 if (status)
1693 return status;
1694
9cf514cc
CH		 1695 READ_BUF(4);
1696 lrp->lrf_body_len = be32_to_cpup(p++);
1697 if (lrp->lrf_body_len > 0) {
1698 READ_BUF(lrp->lrf_body_len);
1699 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1700 }
1701 } else {
1702 lrp->lr_seg.offset = 0;
1703 lrp->lr_seg.length = NFS4_MAX_UINT64;
1704 }
1705
1706 DECODE_TAIL;
1707}
1708#endif /* CONFIG_NFSD_PNFS */
1709
95d871f0
AS		 1710static __be32
1711nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1712 struct nfsd4_fallocate *fallocate)
1713{
1714 DECODE_HEAD;
1715
1716 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1717 if (status)
1718 return status;
1719
1720 READ_BUF(16);
1721 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1722 xdr_decode_hyper(p, &fallocate->falloc_length);
1723
1724 DECODE_TAIL;
1725}
1726
ffa0160a
CH		 1727static __be32
1728nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1729{
1730 DECODE_HEAD;
1731
1732 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1733 if (status)
1734 return status;
1735 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1736 if (status)
1737 return status;
1738
1739 READ_BUF(8 + 8 + 8);
1740 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1741 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1742 p = xdr_decode_hyper(p, &clone->cl_count);
1743 DECODE_TAIL;
1744}
1745
29ae7f9d
AS		 1746static __be32
1747nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1748{
1749 DECODE_HEAD;
1750 unsigned int tmp;
1751
1752 status = nfsd4_decode_stateid(argp, &copy->cp_src_stateid);
1753 if (status)
1754 return status;
1755 status = nfsd4_decode_stateid(argp, &copy->cp_dst_stateid);
1756 if (status)
1757 return status;
1758
1759 READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
1760 p = xdr_decode_hyper(p, &copy->cp_src_pos);
1761 p = xdr_decode_hyper(p, &copy->cp_dst_pos);
1762 p = xdr_decode_hyper(p, &copy->cp_count);
1763 copy->cp_consecutive = be32_to_cpup(p++);
1764 copy->cp_synchronous = be32_to_cpup(p++);
1765 tmp = be32_to_cpup(p); /* Source server list not supported */
1766
1767 DECODE_TAIL;
1768}
1769
24bab491
AS		 1770static __be32
1771nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1772{
1773 DECODE_HEAD;
1774
1775 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1776 if (status)
1777 return status;
1778
1779 READ_BUF(8 + 4);
1780 p = xdr_decode_hyper(p, &seek->seek_offset);
1781 seek->seek_whence = be32_to_cpup(p);
1782
1783 DECODE_TAIL;
1784}
1785
347e0ad9
BH		 1786static __be32
1787nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1788{
1789 return nfs_ok;
1790}
1791
3c375c6f
BH		 1792static __be32
1793nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1794{
1e685ec2 1795 return nfserr_notsupp;
3c375c6f
BH		 1796}
1797
347e0ad9
BH		 1798typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1799
c1df609d 1800static const nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1801 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1802 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1803 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1804 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1805 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1806 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1807 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1808 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1809 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1810 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1811 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1812 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1813 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1814 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1815 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1816 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1817 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1818 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1819 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1820 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1821 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1822 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1823 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1824 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1825 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1826 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1827 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1828 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1829 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1830 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1831 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1832 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1833 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1834 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1835 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1836 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1837 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1838
1839 /* new operations for NFSv4.1 */
cb73a9f4 1840 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1841 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1842 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1843 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1844 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1845 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae 1846 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc
CH		 1847#ifdef CONFIG_NFSD_PNFS
1848 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1849 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1850 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1851 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1852 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1853#else
9064caae
RD		 1854 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1855 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1856 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1857 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1858 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc 1859#endif
04f4ad16 1860 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1861 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1862 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1863 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1864 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1865 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1866 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
87a15a80
AS		 1867
1868 /* new operations for NFSv4.2 */
95d871f0 1869 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
29ae7f9d 1870 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
87a15a80 1871 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
b0cb9085 1872 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
87a15a80
AS		 1873 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1874 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1875 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1876 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1877 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1878 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
24bab491 1879 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
87a15a80 1880 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
ffa0160a 1881 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
2db134eb
AA		 1882};
1883
e1a90ebd
AS		 1884static inline bool
1885nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1886{
8217d146 1887 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1888 return false;
8217d146 1889 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1890 return false;
8217d146
AS		 1891 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1892 return false;
1893 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1894 return false;
1895 return true;
1896}
f2feb96b 1897
b37ad28b 1898static __be32
1da177e4
LT		 1899nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1900{
1901 DECODE_HEAD;
1902 struct nfsd4_op *op;
1091006c 1903 bool cachethis = false;
a5cddc88
BF		 1904 int auth_slack= argp->rqstp->rq_auth_slack;
1905 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 1906 int readcount = 0;
1907 int readbytes = 0;
1da177e4
LT		 1908 int i;
1909
1da177e4 1910 READ_BUF(4);
06553991 1911 argp->taglen = be32_to_cpup(p++);
4aed9c46 1912 READ_BUF(argp->taglen);
1da177e4 1913 SAVEMEM(argp->tag, argp->taglen);
4aed9c46 1914 READ_BUF(8);
06553991
BF		 1915 argp->minorversion = be32_to_cpup(p++);
1916 argp->opcnt = be32_to_cpup(p++);
4f0cefbf 1917 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 1918
1919 if (argp->taglen > NFSD4_MAX_TAGLEN)
1920 goto xdr_error;
0078117c
BF		 1921 /*
1922 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
1923 * here, so we return success at the xdr level so that
1924 * nfsd4_proc can handle this is an NFS-level error.
1925 */
1926 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
1927 return 0;
1da177e4 1928
e8c96f8c 1929 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
5d6031ca 1930 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1da177e4
LT		 1931 if (!argp->ops) {
1932 argp->ops = argp->iops;
817cb9d4 1933 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1934 goto xdr_error;
1935 }
1936 }
1937
e1a90ebd 1938 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1939 argp->opcnt = 0;
1940
1da177e4
LT		 1941 for (i = 0; i < argp->opcnt; i++) {
1942 op = &argp->ops[i];
1943 op->replay = NULL;
1944
8a61b18c 1945 READ_BUF(4);
06553991 1946 op->opnum = be32_to_cpup(p++);
1da177e4 1947
e1a90ebd
AS		 1948 if (nfsd4_opnum_in_range(argp, op))
1949 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1950 else {
1da177e4
LT		 1951 op->opnum = OP_ILLEGAL;
1952 op->status = nfserr_op_illegal;
1da177e4 1953 }
f4f9ef4a 1954 op->opdesc = OPDESC(op);
1091006c
BF		 1955 /*
1956 * We'll try to cache the result in the DRC if any one
1957 * op in the compound wants to be cached:
1958 */
1959 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 1960
b0e35fda
BF		 1961 if (op->opnum == OP_READ) {
1962 readcount++;
1963 readbytes += nfsd4_max_reply(argp->rqstp, op);
1964 } else
1965 max_reply += nfsd4_max_reply(argp->rqstp, op);
f7b43d0c 1966 /*
7323f0d2
KM		 1967 * OP_LOCK and OP_LOCKT may return a conflicting lock.
1968 * (Special case because it will just skip encoding this
1969 * if it runs out of xdr buffer space, and it is the only
1970 * operation that behaves this way.)
f7b43d0c 1971 */
7323f0d2 1972 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
f7b43d0c 1973 max_reply += NFS4_OPAQUE_LIMIT;
e372ba60
BF		 1974
1975 if (op->status) {
1976 argp->opcnt = i+1;
1977 break;
1978 }
1da177e4 1979 }
1091006c
BF		 1980 /* Sessions make the DRC unnecessary: */
1981 if (argp->minorversion)
1982 cachethis = false;
b0e35fda 1983 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 1984 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 1985
a5cddc88 1986 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
779fb0f3 1987 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
b0e35fda 1988
1da177e4
LT		 1989 DECODE_TAIL;
1990}
1da177e4 1991
b8800921
N		 1992static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
1993 struct svc_export *exp)
c654b8a9 1994{
b8800921
N		 1995 if (exp->ex_flags & NFSEXP_V4ROOT) {
1996 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
1997 *p++ = 0;
1998 } else if (IS_I_VERSION(inode)) {
39ca1bf6 1999 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
c654b8a9 2000 } else {
d05d5744
BF		 2001 *p++ = cpu_to_be32(stat->ctime.tv_sec);
2002 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
c654b8a9 2003 }
d05d5744 2004 return p;
c654b8a9
BF		 2005}
2006
d05d5744 2007static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 2008{
d05d5744 2009 *p++ = cpu_to_be32(c->atomic);
c654b8a9 2010 if (c->change_supported) {
d05d5744
BF		 2011 p = xdr_encode_hyper(p, c->before_change);
2012 p = xdr_encode_hyper(p, c->after_change);
c654b8a9 2013 } else {
d05d5744
BF		 2014 *p++ = cpu_to_be32(c->before_ctime_sec);
2015 *p++ = cpu_to_be32(c->before_ctime_nsec);
2016 *p++ = cpu_to_be32(c->after_ctime_sec);
2017 *p++ = cpu_to_be32(c->after_ctime_nsec);
c654b8a9 2018 }
d05d5744 2019 return p;
c654b8a9 2020}
1da177e4 2021
81c3f413 2022/* Encode as an array of strings the string given with components
e7a0444a 2023 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 2024 */
ddd1ea56
BF		 2025static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2026 char *components, char esc_enter,
2027 char esc_exit)
81c3f413 2028{
ddd1ea56 2029 __be32 *p;
082d4bd7
BF		 2030 __be32 pathlen;
2031 int pathlen_offset;
81c3f413 2032 int strlen, count=0;
e7a0444a 2033 char *str, *end, *next;
81c3f413
BF		 2034
2035 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 2036
2037 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 2038 p = xdr_reserve_space(xdr, 4);
2039 if (!p)
81c3f413 2040 return nfserr_resource;
082d4bd7
BF		 2041 p++; /* We will fill this in with @count later */
2042
81c3f413
BF		 2043 end = str = components;
2044 while (*end) {
e7a0444a
WAA		 2045 bool found_esc = false;
2046
2047 /* try to parse as esc_start, ..., esc_end, sep */
2048 if (*str == esc_enter) {
2049 for (; *end && (*end != esc_exit); end++)
2050 /* find esc_exit or end of string */;
2051 next = end + 1;
2052 if (*end && (!*next || *next == sep)) {
2053 str++;
2054 found_esc = true;
2055 }
2056 }
2057
2058 if (!found_esc)
2059 for (; *end && (*end != sep); end++)
2060 /* find sep or end of string */;
2061
81c3f413
BF		 2062 strlen = end - str;
2063 if (strlen) {
ddd1ea56
BF		 2064 p = xdr_reserve_space(xdr, strlen + 4);
2065 if (!p)
81c3f413 2066 return nfserr_resource;
0c0c267b 2067 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 2068 count++;
2069 }
2070 else
2071 end++;
5a64e569
BC		 2072 if (found_esc)
2073 end = next;
2074
81c3f413
BF		 2075 str = end;
2076 }
bf7491f1 2077 pathlen = htonl(count);
082d4bd7 2078 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 2079 return 0;
2080}
2081
e7a0444a
WAA		 2082/* Encode as an array of strings the string given with components
2083 * separated @sep.
2084 */
ddd1ea56
BF		 2085static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2086 char *components)
e7a0444a 2087{
ddd1ea56 2088 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 2089}
2090
81c3f413
BF		 2091/*
2092 * encode a location element of a fs_locations structure
2093 */
ddd1ea56
BF		 2094static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2095 struct nfsd4_fs_location *location)
81c3f413 2096{
b37ad28b 2097 __be32 status;
81c3f413 2098
ddd1ea56 2099 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 2100 '[', ']');
81c3f413
BF		 2101 if (status)
2102 return status;
ddd1ea56 2103 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 2104 if (status)
2105 return status;
81c3f413
BF		 2106 return 0;
2107}
2108
2109/*
ed748aac 2110 * Encode a path in RFC3530 'pathname4' format
81c3f413 2111 */
ddd1ea56
BF		 2112static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2113 const struct path *root,
2114 const struct path *path)
81c3f413 2115{
301f0268 2116 struct path cur = *path;
ddd1ea56 2117 __be32 *p;
ed748aac
TM		 2118 struct dentry **components = NULL;
2119 unsigned int ncomponents = 0;
2120 __be32 err = nfserr_jukebox;
81c3f413 2121
ed748aac 2122 dprintk("nfsd4_encode_components(");
81c3f413 2123
ed748aac
TM		 2124 path_get(&cur);
2125 /* First walk the path up to the nfsd root, and store the
2126 * dentries/path components in an array.
2127 */
2128 for (;;) {
b77a4b2e 2129 if (path_equal(&cur, root))
ed748aac
TM		 2130 break;
2131 if (cur.dentry == cur.mnt->mnt_root) {
2132 if (follow_up(&cur))
2133 continue;
2134 goto out_free;
2135 }
2136 if ((ncomponents & 15) == 0) {
2137 struct dentry **new;
2138 new = krealloc(components,
2139 sizeof(*new) * (ncomponents + 16),
2140 GFP_KERNEL);
2141 if (!new)
2142 goto out_free;
2143 components = new;
2144 }
2145 components[ncomponents++] = cur.dentry;
2146 cur.dentry = dget_parent(cur.dentry);
2147 }
ddd1ea56
BF		 2148 err = nfserr_resource;
2149 p = xdr_reserve_space(xdr, 4);
2150 if (!p)
ed748aac 2151 goto out_free;
c373b0a4 2152 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 2153
2154 while (ncomponents) {
2155 struct dentry *dentry = components[ncomponents - 1];
301f0268 2156 unsigned int len;
ed748aac 2157
301f0268
AV		 2158 spin_lock(&dentry->d_lock);
2159 len = dentry->d_name.len;
ddd1ea56
BF		 2160 p = xdr_reserve_space(xdr, len + 4);
2161 if (!p) {
301f0268 2162 spin_unlock(&dentry->d_lock);
ed748aac 2163 goto out_free;
301f0268 2164 }
0c0c267b 2165 p = xdr_encode_opaque(p, dentry->d_name.name, len);
a455589f 2166 dprintk("/%pd", dentry);
301f0268 2167 spin_unlock(&dentry->d_lock);
ed748aac
TM		 2168 dput(dentry);
2169 ncomponents--;
81c3f413 2170 }
ed748aac 2171
ed748aac
TM		 2172 err = 0;
2173out_free:
2174 dprintk(")\n");
2175 while (ncomponents)
2176 dput(components[--ncomponents]);
2177 kfree(components);
2178 path_put(&cur);
2179 return err;
2180}
2181
ddd1ea56
BF		 2182static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2183 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 2184{
2185 struct svc_export *exp_ps;
2186 __be32 res;
2187
2188 exp_ps = rqst_find_fsidzero_export(rqstp);
2189 if (IS_ERR(exp_ps))
2190 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 2191 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 2192 exp_put(exp_ps);
2193 return res;
81c3f413
BF		 2194}
2195
2196/*
2197 * encode a fs_locations structure
2198 */
ddd1ea56
BF		 2199static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2200 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 2201{
b37ad28b 2202 __be32 status;
cc45f017 2203 int i;
ddd1ea56 2204 __be32 *p;
81c3f413 2205 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 2206
ddd1ea56 2207 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 2208 if (status)
2209 return status;
ddd1ea56
BF		 2210 p = xdr_reserve_space(xdr, 4);
2211 if (!p)
81c3f413 2212 return nfserr_resource;
c373b0a4 2213 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 2214 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 2215 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 2216 if (status)
2217 return status;
2218 }
81c3f413
BF		 2219 return 0;
2220}
1da177e4 2221
3d2544b1
BF		 2222static u32 nfs4_file_type(umode_t mode)
2223{
2224 switch (mode & S_IFMT) {
2225 case S_IFIFO: return NF4FIFO;
2226 case S_IFCHR: return NF4CHR;
2227 case S_IFDIR: return NF4DIR;
2228 case S_IFBLK: return NF4BLK;
2229 case S_IFLNK: return NF4LNK;
2230 case S_IFREG: return NF4REG;
2231 case S_IFSOCK: return NF4SOCK;
2232 default: return NF4BAD;
2233 };
2234}
1da177e4 2235
b37ad28b 2236static inline __be32
ddd1ea56
BF		 2237nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2238 struct nfs4_ace *ace)
1da177e4 2239{
3554116d 2240 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 2241 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 2242 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 2243 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 2244 else
ddd1ea56 2245 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 2246}
2247
6896f15a 2248static inline __be32
8a4c3926 2249nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
6896f15a 2250{
8a4c3926
JL		 2251 __be32 *p;
2252 unsigned long i = hweight_long(layout_types);
6896f15a 2253
8a4c3926
JL		 2254 p = xdr_reserve_space(xdr, 4 + 4 * i);
2255 if (!p)
2256 return nfserr_resource;
2257
2258 *p++ = cpu_to_be32(i);
2259
2260 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2261 if (layout_types & (1 << i))
2262 *p++ = cpu_to_be32(i);
6896f15a
KM		 2263
2264 return 0;
2265}
2266
42ca0993
BF		 2267#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2268 FATTR4_WORD0_RDATTR_ERROR)
2269#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
c2227a39 2270#define WORD2_ABSENT_FS_ATTRS 0
42ca0993 2271
18032ca0
DQ		 2272#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2273static inline __be32
ddd1ea56
BF		 2274nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2275 void *context, int len)
18032ca0 2276{
ddd1ea56 2277 __be32 *p;
18032ca0 2278
ddd1ea56
BF		 2279 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2280 if (!p)
18032ca0
DQ		 2281 return nfserr_resource;
2282
2283 /*
2284 * For now we use a 0 here to indicate the null translation; in
2285 * the future we may place a call to translation code here.
2286 */
c373b0a4
BF		 2287 *p++ = cpu_to_be32(0); /* lfs */
2288 *p++ = cpu_to_be32(0); /* pi */
18032ca0 2289 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 2290 return 0;
2291}
2292#else
2293static inline __be32
ddd1ea56
BF		 2294nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2295 void *context, int len)
18032ca0
DQ		 2296{ return 0; }
2297#endif
2298
c2227a39 2299static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
42ca0993
BF		 2300{
2301 /* As per referral draft: */
2302 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2303 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2304 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2305 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2306 *rdattr_err = NFSERR_MOVED;
2307 else
2308 return nfserr_moved;
2309 }
2310 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2311 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
c2227a39 2312 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
42ca0993
BF		 2313 return 0;
2314}
1da177e4 2315
ae7095a7
BF		 2316
2317static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2318{
2319 struct path path = exp->ex_path;
2320 int err;
2321
2322 path_get(&path);
2323 while (follow_up(&path)) {
2324 if (path.dentry != path.mnt->mnt_root)
2325 break;
2326 }
a528d35e 2327 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
ae7095a7
BF		 2328 path_put(&path);
2329 return err;
2330}
2331
75976de6
KM		 2332static __be32
2333nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2334{
2335 __be32 *p;
2336
2337 if (bmval2) {
2338 p = xdr_reserve_space(xdr, 16);
2339 if (!p)
2340 goto out_resource;
2341 *p++ = cpu_to_be32(3);
2342 *p++ = cpu_to_be32(bmval0);
2343 *p++ = cpu_to_be32(bmval1);
2344 *p++ = cpu_to_be32(bmval2);
2345 } else if (bmval1) {
2346 p = xdr_reserve_space(xdr, 12);
2347 if (!p)
2348 goto out_resource;
2349 *p++ = cpu_to_be32(2);
2350 *p++ = cpu_to_be32(bmval0);
2351 *p++ = cpu_to_be32(bmval1);
2352 } else {
2353 p = xdr_reserve_space(xdr, 8);
2354 if (!p)
2355 goto out_resource;
2356 *p++ = cpu_to_be32(1);
2357 *p++ = cpu_to_be32(bmval0);
2358 }
2359
2360 return 0;
2361out_resource:
2362 return nfserr_resource;
2363}
2364
1da177e4
LT		 2365/*
2366 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2367 * ourselves.
1da177e4 2368 */
da2ebce6 2369static __be32
d5184658
BF		 2370nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2371 struct svc_export *exp,
2372 struct dentry *dentry, u32 *bmval,
406a7ea9 2373 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2374{
2375 u32 bmval0 = bmval[0];
2376 u32 bmval1 = bmval[1];
7e705706 2377 u32 bmval2 = bmval[2];
1da177e4 2378 struct kstat stat;
d50e6136 2379 struct svc_fh *tempfh = NULL;
1da177e4 2380 struct kstatfs statfs;
ddd1ea56 2381 __be32 *p;
1fcea5b2 2382 int starting_len = xdr->buf->len;
082d4bd7
BF		 2383 int attrlen_offset;
2384 __be32 attrlen;
1da177e4
LT		 2385 u32 dummy;
2386 u64 dummy64;
42ca0993 2387 u32 rdattr_err = 0;
b37ad28b 2388 __be32 status;
b8dd7b9a 2389 int err;
1da177e4 2390 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2391 void *context = NULL;
2392 int contextlen;
2393 bool contextsupport = false;
7e705706
AA		 2394 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2395 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2396 struct path path = {
2397 .mnt = exp->ex_path.mnt,
2398 .dentry = dentry,
2399 };
3d733711 2400 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2401
2402 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
916d2d84 2403 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
1da177e4 2404
42ca0993 2405 if (exp->ex_fslocs.migrated) {
c2227a39 2406 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
42ca0993
BF		 2407 if (status)
2408 goto out;
2409 }
2410
a528d35e 2411 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
b8dd7b9a 2412 if (err)
1da177e4 2413 goto out_nfserr;
12337901
CH		 2414 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2415 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2416 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2417 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2418 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2419 if (err)
1da177e4
LT		 2420 goto out_nfserr;
2421 }
2422 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2423 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2424 status = nfserr_jukebox;
2425 if (!tempfh)
2426 goto out;
2427 fh_init(tempfh, NFS4_FHSIZE);
2428 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2429 if (status)
2430 goto out;
d50e6136 2431 fhp = tempfh;
1da177e4 2432 }
0c9d65e7 2433 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2434 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
0c9d65e7
AG		 2435 if (err == -EOPNOTSUPP)
2436 bmval0 &= ~FATTR4_WORD0_ACL;
2437 else if (err == -EINVAL) {
2438 status = nfserr_attrnotsupp;
2439 goto out;
2440 } else if (err != 0)
2441 goto out_nfserr;
1da177e4 2442 }
1da177e4 2443
18032ca0 2444#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
c2227a39
KM		 2445 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2446 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
32ddd944
BF		 2447 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2448 err = security_inode_getsecctx(d_inode(dentry),
18032ca0 2449 &context, &contextlen);
32ddd944
BF		 2450 else
2451 err = -EOPNOTSUPP;
18032ca0
DQ		 2452 contextsupport = (err == 0);
2453 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2454 if (err == -EOPNOTSUPP)
2455 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2456 else if (err)
2457 goto out_nfserr;
2458 }
2459 }
2460#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2461
75976de6
KM		 2462 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2463 if (status)
2464 goto out;
082d4bd7
BF		 2465
2466 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2467 p = xdr_reserve_space(xdr, 4);
2468 if (!p)
2469 goto out_resource;
082d4bd7 2470 p++; /* to be backfilled later */
1da177e4
LT		 2471
2472 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
dcd20869
BF		 2473 u32 supp[3];
2474
2475 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
7e705706 2476
0c9d65e7 2477 if (!IS_POSIXACL(dentry->d_inode))
916d2d84 2478 supp[0] &= ~FATTR4_WORD0_ACL;
18032ca0 2479 if (!contextsupport)
916d2d84
BF		 2480 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2481 if (!supp[2]) {
ddd1ea56
BF		 2482 p = xdr_reserve_space(xdr, 12);
2483 if (!p)
2b44f1ba 2484 goto out_resource;
c373b0a4 2485 *p++ = cpu_to_be32(2);
916d2d84
BF		 2486 *p++ = cpu_to_be32(supp[0]);
2487 *p++ = cpu_to_be32(supp[1]);
7e705706 2488 } else {
ddd1ea56
BF		 2489 p = xdr_reserve_space(xdr, 16);
2490 if (!p)
2b44f1ba 2491 goto out_resource;
c373b0a4 2492 *p++ = cpu_to_be32(3);
916d2d84
BF		 2493 *p++ = cpu_to_be32(supp[0]);
2494 *p++ = cpu_to_be32(supp[1]);
2495 *p++ = cpu_to_be32(supp[2]);
7e705706 2496 }
1da177e4
LT		 2497 }
2498 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2499 p = xdr_reserve_space(xdr, 4);
2500 if (!p)
1da177e4 2501 goto out_resource;
3d2544b1 2502 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2503 if (dummy == NF4BAD) {
2504 status = nfserr_serverfault;
2505 goto out;
2506 }
c373b0a4 2507 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2508 }
2509 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2510 p = xdr_reserve_space(xdr, 4);
2511 if (!p)
1da177e4 2512 goto out_resource;
49640001 2513 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2514 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2515 else
c373b0a4
BF		 2516 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2517 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2518 }
2519 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2520 p = xdr_reserve_space(xdr, 8);
2521 if (!p)
1da177e4 2522 goto out_resource;
b8800921 2523 p = encode_change(p, &stat, d_inode(dentry), exp);
1da177e4
LT		 2524 }
2525 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2526 p = xdr_reserve_space(xdr, 8);
2527 if (!p)
1da177e4 2528 goto out_resource;
b64c7f3b 2529 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2530 }
2531 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2532 p = xdr_reserve_space(xdr, 4);
2533 if (!p)
1da177e4 2534 goto out_resource;
c373b0a4 2535 *p++ = cpu_to_be32(1);
1da177e4
LT		 2536 }
2537 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2538 p = xdr_reserve_space(xdr, 4);
2539 if (!p)
1da177e4 2540 goto out_resource;
c373b0a4 2541 *p++ = cpu_to_be32(1);
1da177e4
LT		 2542 }
2543 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2544 p = xdr_reserve_space(xdr, 4);
2545 if (!p)
1da177e4 2546 goto out_resource;
c373b0a4 2547 *p++ = cpu_to_be32(0);
1da177e4
LT		 2548 }
2549 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2550 p = xdr_reserve_space(xdr, 16);
2551 if (!p)
1da177e4 2552 goto out_resource;
42ca0993 2553 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 2554 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2555 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2556 } else switch(fsid_source(fhp)) {
2557 case FSIDSOURCE_FSID:
b64c7f3b
BF		 2558 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2559 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 2560 break;
2561 case FSIDSOURCE_DEV:
c373b0a4
BF		 2562 *p++ = cpu_to_be32(0);
2563 *p++ = cpu_to_be32(MAJOR(stat.dev));
2564 *p++ = cpu_to_be32(0);
2565 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 2566 break;
2567 case FSIDSOURCE_UUID:
94eb3689
KM		 2568 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2569 EX_UUID_LEN);
af6a4e28 2570 break;
1da177e4
LT		 2571 }
2572 }
2573 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2574 p = xdr_reserve_space(xdr, 4);
2575 if (!p)
1da177e4 2576 goto out_resource;
c373b0a4 2577 *p++ = cpu_to_be32(0);
1da177e4
LT		 2578 }
2579 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2580 p = xdr_reserve_space(xdr, 4);
2581 if (!p)
1da177e4 2582 goto out_resource;
c373b0a4 2583 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 2584 }
2585 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2586 p = xdr_reserve_space(xdr, 4);
2587 if (!p)
1da177e4 2588 goto out_resource;
c373b0a4 2589 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 2590 }
2591 if (bmval0 & FATTR4_WORD0_ACL) {
2592 struct nfs4_ace *ace;
1da177e4
LT		 2593
2594 if (acl == NULL) {
ddd1ea56
BF		 2595 p = xdr_reserve_space(xdr, 4);
2596 if (!p)
1da177e4
LT		 2597 goto out_resource;
2598
c373b0a4 2599 *p++ = cpu_to_be32(0);
1da177e4
LT		 2600 goto out_acl;
2601 }
ddd1ea56
BF		 2602 p = xdr_reserve_space(xdr, 4);
2603 if (!p)
1da177e4 2604 goto out_resource;
c373b0a4 2605 *p++ = cpu_to_be32(acl->naces);
1da177e4 2606
28e05dd8 2607 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2608 p = xdr_reserve_space(xdr, 4*3);
2609 if (!p)
1da177e4 2610 goto out_resource;
c373b0a4
BF		 2611 *p++ = cpu_to_be32(ace->type);
2612 *p++ = cpu_to_be32(ace->flag);
2613 *p++ = cpu_to_be32(ace->access_mask &
2614 NFS4_ACE_MASK_ALL);
ddd1ea56 2615 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2616 if (status)
2617 goto out;
2618 }
2619 }
2620out_acl:
2621 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2622 p = xdr_reserve_space(xdr, 4);
2623 if (!p)
1da177e4 2624 goto out_resource;
0c9d65e7 2625 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
1da177e4
LT		 2626 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2627 }
2628 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2629 p = xdr_reserve_space(xdr, 4);
2630 if (!p)
1da177e4 2631 goto out_resource;
c373b0a4 2632 *p++ = cpu_to_be32(1);
1da177e4
LT		 2633 }
2634 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2635 p = xdr_reserve_space(xdr, 4);
2636 if (!p)
1da177e4 2637 goto out_resource;
c373b0a4 2638 *p++ = cpu_to_be32(0);
1da177e4
LT		 2639 }
2640 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
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_CHOWN_RESTRICTED) {
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_FILEHANDLE) {
ddd1ea56
BF		 2653 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2654 if (!p)
1da177e4 2655 goto out_resource;
0c0c267b
BF		 2656 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2657 fhp->fh_handle.fh_size);
1da177e4
LT		 2658 }
2659 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2660 p = xdr_reserve_space(xdr, 8);
2661 if (!p)
1da177e4 2662 goto out_resource;
b64c7f3b 2663 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 2664 }
2665 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2666 p = xdr_reserve_space(xdr, 8);
2667 if (!p)
1da177e4 2668 goto out_resource;
b64c7f3b 2669 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2670 }
2671 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2672 p = xdr_reserve_space(xdr, 8);
2673 if (!p)
1da177e4 2674 goto out_resource;
b64c7f3b 2675 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2676 }
2677 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2678 p = xdr_reserve_space(xdr, 8);
2679 if (!p)
1da177e4 2680 goto out_resource;
b64c7f3b 2681 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 2682 }
81c3f413 2683 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2684 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2685 if (status)
2686 goto out;
2687 }
1da177e4 2688 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2689 p = xdr_reserve_space(xdr, 4);
2690 if (!p)
1da177e4 2691 goto out_resource;
c373b0a4 2692 *p++ = cpu_to_be32(1);
1da177e4
LT		 2693 }
2694 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2695 p = xdr_reserve_space(xdr, 8);
2696 if (!p)
1da177e4 2697 goto out_resource;
b64c7f3b 2698 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2699 }
2700 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2701 p = xdr_reserve_space(xdr, 4);
2702 if (!p)
1da177e4 2703 goto out_resource;
c373b0a4 2704 *p++ = cpu_to_be32(255);
1da177e4
LT		 2705 }
2706 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2707 p = xdr_reserve_space(xdr, 4);
2708 if (!p)
1da177e4 2709 goto out_resource;
c373b0a4 2710 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 2711 }
2712 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2713 p = xdr_reserve_space(xdr, 8);
2714 if (!p)
1da177e4 2715 goto out_resource;
b64c7f3b 2716 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2717 }
2718 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2719 p = xdr_reserve_space(xdr, 8);
2720 if (!p)
1da177e4 2721 goto out_resource;
b64c7f3b 2722 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2723 }
2724 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2725 p = xdr_reserve_space(xdr, 4);
2726 if (!p)
1da177e4 2727 goto out_resource;
c373b0a4 2728 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 2729 }
2730 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2731 p = xdr_reserve_space(xdr, 4);
2732 if (!p)
1da177e4 2733 goto out_resource;
c373b0a4 2734 *p++ = cpu_to_be32(1);
1da177e4
LT		 2735 }
2736 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2737 p = xdr_reserve_space(xdr, 4);
2738 if (!p)
1da177e4 2739 goto out_resource;
c373b0a4 2740 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 2741 }
2742 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2743 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2744 if (status)
2745 goto out;
2746 }
2747 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2748 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2749 if (status)
2750 goto out;
2751 }
2752 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2753 p = xdr_reserve_space(xdr, 8);
2754 if (!p)
1da177e4 2755 goto out_resource;
c373b0a4
BF		 2756 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2757 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 2758 }
2759 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2760 p = xdr_reserve_space(xdr, 8);
2761 if (!p)
1da177e4
LT		 2762 goto out_resource;
2763 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 2764 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2765 }
2766 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2767 p = xdr_reserve_space(xdr, 8);
2768 if (!p)
1da177e4
LT		 2769 goto out_resource;
2770 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 2771 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2772 }
2773 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2774 p = xdr_reserve_space(xdr, 8);
2775 if (!p)
1da177e4
LT		 2776 goto out_resource;
2777 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 2778 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2779 }
2780 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2781 p = xdr_reserve_space(xdr, 8);
2782 if (!p)
1da177e4
LT		 2783 goto out_resource;
2784 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 2785 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2786 }
2787 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2788 p = xdr_reserve_space(xdr, 12);
2789 if (!p)
1da177e4 2790 goto out_resource;
b64c7f3b 2791 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 2792 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 2793 }
2794 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2795 p = xdr_reserve_space(xdr, 12);
2796 if (!p)
1da177e4 2797 goto out_resource;
c373b0a4
BF		 2798 *p++ = cpu_to_be32(0);
2799 *p++ = cpu_to_be32(1);
2800 *p++ = cpu_to_be32(0);
1da177e4
LT		 2801 }
2802 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2803 p = xdr_reserve_space(xdr, 12);
2804 if (!p)
1da177e4 2805 goto out_resource;
b64c7f3b 2806 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 2807 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 2808 }
2809 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2810 p = xdr_reserve_space(xdr, 12);
2811 if (!p)
1da177e4 2812 goto out_resource;
b64c7f3b 2813 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 2814 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 2815 }
2816 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
0a2050d7
KM		 2817 struct kstat parent_stat;
2818 u64 ino = stat.ino;
2819
ddd1ea56
BF		 2820 p = xdr_reserve_space(xdr, 8);
2821 if (!p)
1da177e4 2822 goto out_resource;
406a7ea9
FF		 2823 /*
2824 * Get parent's attributes if not ignoring crossmount
2825 * and this is the root of a cross-mounted filesystem.
2826 */
2827 if (ignore_crossmnt == 0 &&
0a2050d7
KM		 2828 dentry == exp->ex_path.mnt->mnt_root) {
2829 err = get_parent_attributes(exp, &parent_stat);
2830 if (err)
2831 goto out_nfserr;
2832 ino = parent_stat.ino;
2833 }
2834 p = xdr_encode_hyper(p, ino);
1da177e4 2835 }
9cf514cc 2836#ifdef CONFIG_NFSD_PNFS
6896f15a 2837 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
8a4c3926 2838 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 2839 if (status)
2840 goto out;
2841 }
2842
2843 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
8a4c3926 2844 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 2845 if (status)
2846 goto out;
9cf514cc
CH		 2847 }
2848
2849 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2850 p = xdr_reserve_space(xdr, 4);
2851 if (!p)
2852 goto out_resource;
2853 *p++ = cpu_to_be32(stat.blksize);
2854 }
2855#endif /* CONFIG_NFSD_PNFS */
8c18f205 2856 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
b26b78cb
TM		 2857 u32 supp[3];
2858
2859 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2860 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
2861 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
2862 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
2863
2864 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
75976de6
KM		 2865 if (status)
2866 goto out;
8c18f205 2867 }
7e705706 2868
7d580722
KM		 2869 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2870 status = nfsd4_encode_security_label(xdr, rqstp, context,
2871 contextlen);
2872 if (status)
2873 goto out;
2874 }
2875
082d4bd7
BF		 2876 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2877 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2878 status = nfs_ok;
2879
2880out:
ba4e55bb 2881#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2882 if (context)
2883 security_release_secctx(context, contextlen);
ba4e55bb 2884#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2885 kfree(acl);
18df11d0 2886 if (tempfh) {
d50e6136 2887 fh_put(tempfh);
18df11d0
YZ		 2888 kfree(tempfh);
2889 }
1fcea5b2
BF		 2890 if (status)
2891 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2892 return status;
2893out_nfserr:
b8dd7b9a 2894 status = nfserrno(err);
1da177e4
LT		 2895 goto out;
2896out_resource:
1da177e4
LT		 2897 status = nfserr_resource;
2898 goto out;
1da177e4
LT		 2899}
2900
2825a7f9
BF		 2901static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2902 struct xdr_buf *buf, __be32 *p, int bytes)
2903{
2904 xdr->scratch.iov_len = 0;
2905 memset(buf, 0, sizeof(struct xdr_buf));
2906 buf->head[0].iov_base = p;
2907 buf->head[0].iov_len = 0;
2908 buf->len = 0;
2909 xdr->buf = buf;
2910 xdr->iov = buf->head;
2911 xdr->p = p;
2912 xdr->end = (void *)p + bytes;
2913 buf->buflen = bytes;
2914}
2915
d5184658
BF		 2916__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2917 struct svc_fh *fhp, struct svc_export *exp,
2918 struct dentry *dentry, u32 *bmval,
2919 struct svc_rqst *rqstp, int ignore_crossmnt)
2920{
2825a7f9 2921 struct xdr_buf dummy;
d5184658
BF		 2922 struct xdr_stream xdr;
2923 __be32 ret;
2924
2825a7f9 2925 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2926 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2927 ignore_crossmnt);
2928 *p = xdr.p;
2929 return ret;
2930}
2931
c0ce6ec8
BF		 2932static inline int attributes_need_mount(u32 *bmval)
2933{
2934 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2935 return 1;
2936 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2937 return 1;
2938 return 0;
2939}
2940
b37ad28b 2941static __be32
561f0ed4
BF		 2942nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2943 const char *name, int namlen)
1da177e4
LT		 2944{
2945 struct svc_export *exp = cd->rd_fhp->fh_export;
2946 struct dentry *dentry;
b37ad28b 2947 __be32 nfserr;
406a7ea9 2948 int ignore_crossmnt = 0;
1da177e4 2949
bbddca8e 2950 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
1da177e4
LT		 2951 if (IS_ERR(dentry))
2952 return nfserrno(PTR_ERR(dentry));
2b0143b5 2953 if (d_really_is_negative(dentry)) {
b2c0cea6 2954 /*
bbddca8e
N		 2955 * we're not holding the i_mutex here, so there's
2956 * a window where this directory entry could have gone
2957 * away.
b2c0cea6
BF		 2958 */
2959 dput(dentry);
2960 return nfserr_noent;
2961 }
1da177e4
LT		 2962
2963 exp_get(exp);
406a7ea9
FF		 2964 /*
2965 * In the case of a mountpoint, the client may be asking for
2966 * attributes that are only properties of the underlying filesystem
2967 * as opposed to the cross-mounted file system. In such a case,
2968 * we will not follow the cross mount and will fill the attribtutes
2969 * directly from the mountpoint dentry.
2970 */
3227fa41 2971 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2972 int err;
2973
3227fa41
BF		 2974 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2975 && !attributes_need_mount(cd->rd_bmval)) {
2976 ignore_crossmnt = 1;
2977 goto out_encode;
2978 }
dcb488a3
AA		 2979 /*
2980 * Why the heck aren't we just using nfsd_lookup??
2981 * Different "."/".." handling? Something else?
2982 * At least, add a comment here to explain....
2983 */
021d3a72
BF		 2984 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2985 if (err) {
2986 nfserr = nfserrno(err);
1da177e4
LT		 2987 goto out_put;
2988 }
dcb488a3
AA		 2989 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2990 if (nfserr)
2991 goto out_put;
1da177e4
LT		 2992
2993 }
3227fa41 2994out_encode:
561f0ed4 2995 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 2996 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2997out_put:
2998 dput(dentry);
2999 exp_put(exp);
3000 return nfserr;
3001}
3002
2ebbc012 3003static __be32 *
561f0ed4 3004nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 3005{
561f0ed4
BF		 3006 __be32 *p;
3007
c3a45617 3008 p = xdr_reserve_space(xdr, 20);
561f0ed4 3009 if (!p)
1da177e4
LT		 3010 return NULL;
3011 *p++ = htonl(2);
3012 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
3013 *p++ = htonl(0); /* bmval1 */
3014
87915c64 3015 *p++ = htonl(4); /* attribute length */
1da177e4 3016 *p++ = nfserr; /* no htonl */
1da177e4
LT		 3017 return p;
3018}
3019
3020static int
a0ad13ef
N		 3021nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3022 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 3023{
a0ad13ef 3024 struct readdir_cd *ccd = ccdv;
1da177e4 3025 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 3026 struct xdr_stream *xdr = cd->xdr;
3027 int start_offset = xdr->buf->len;
3028 int cookie_offset;
aee37764 3029 u32 name_and_cookie;
561f0ed4 3030 int entry_bytes;
b37ad28b 3031 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 3032 __be64 wire_offset;
3033 __be32 *p;
1da177e4
LT		 3034
3035 /* In nfsv4, "." and ".." never make it onto the wire.. */
3036 if (name && isdotent(name, namlen)) {
3037 cd->common.err = nfs_ok;
3038 return 0;
3039 }
3040
561f0ed4
BF		 3041 if (cd->cookie_offset) {
3042 wire_offset = cpu_to_be64(offset);
3043 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3044 &wire_offset, 8);
3045 }
1da177e4 3046
561f0ed4
BF		 3047 p = xdr_reserve_space(xdr, 4);
3048 if (!p)
1da177e4 3049 goto fail;
1da177e4 3050 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 3051 cookie_offset = xdr->buf->len;
3052 p = xdr_reserve_space(xdr, 3*4 + namlen);
3053 if (!p)
3054 goto fail;
1da177e4
LT		 3055 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
3056 p = xdr_encode_array(p, name, namlen); /* name length & name */
3057
561f0ed4 3058 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 3059 switch (nfserr) {
3060 case nfs_ok:
1da177e4
LT		 3061 break;
3062 case nfserr_resource:
3063 nfserr = nfserr_toosmall;
3064 goto fail;
b2c0cea6 3065 case nfserr_noent:
f41c5ad2 3066 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 3067 goto skip_entry;
1da177e4
LT		 3068 default:
3069 /*
3070 * If the client requested the RDATTR_ERROR attribute,
3071 * we stuff the error code into this attribute
3072 * and continue. If this attribute was not requested,
3073 * then in accordance with the spec, we fail the
3074 * entire READDIR operation(!)
3075 */
3076 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3077 goto fail;
561f0ed4 3078 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 3079 if (p == NULL) {
3080 nfserr = nfserr_toosmall;
1da177e4 3081 goto fail;
34081efc 3082 }
1da177e4 3083 }
561f0ed4
BF		 3084 nfserr = nfserr_toosmall;
3085 entry_bytes = xdr->buf->len - start_offset;
3086 if (entry_bytes > cd->rd_maxcount)
3087 goto fail;
3088 cd->rd_maxcount -= entry_bytes;
aee37764
BF		 3089 /*
3090 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3091 * let's always let through the first entry, at least:
3092 */
0ec016e3
BF		 3093 if (!cd->rd_dircount)
3094 goto fail;
3095 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
aee37764
BF		 3096 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3097 goto fail;
3098 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
0ec016e3 3099
561f0ed4 3100 cd->cookie_offset = cookie_offset;
b2c0cea6 3101skip_entry:
1da177e4
LT		 3102 cd->common.err = nfs_ok;
3103 return 0;
3104fail:
561f0ed4 3105 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 3106 cd->common.err = nfserr;
3107 return -EINVAL;
3108}
3109
d0a381dd
BF		 3110static __be32
3111nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 3112{
bc749ca4 3113 __be32 *p;
e2f282b9 3114
d0a381dd
BF		 3115 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3116 if (!p)
3117 return nfserr_resource;
c373b0a4 3118 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 3119 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3120 sizeof(stateid_opaque_t));
d0a381dd 3121 return 0;
e2f282b9
BH		 3122}
3123
695e12f8 3124static __be32
b37ad28b 3125nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 3126{
d0a381dd 3127 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3128 __be32 *p;
1da177e4 3129
bac966d6
BF		 3130 p = xdr_reserve_space(xdr, 8);
3131 if (!p)
3132 return nfserr_resource;
3133 *p++ = cpu_to_be32(access->ac_supported);
3134 *p++ = cpu_to_be32(access->ac_resp_access);
3135 return 0;
1da177e4
LT		 3136}
3137
1d1bc8f2
BF		 3138static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3139{
d0a381dd 3140 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 3141 __be32 *p;
3142
bac966d6
BF		 3143 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3144 if (!p)
3145 return nfserr_resource;
3146 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3147 NFS4_MAX_SESSIONID_LEN);
3148 *p++ = cpu_to_be32(bcts->dir);
3149 /* Upshifting from TCP to RDMA is not supported */
3150 *p++ = cpu_to_be32(0);
3151 return 0;
1d1bc8f2
BF		 3152}
3153
695e12f8 3154static __be32
b37ad28b 3155nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 3156{
d0a381dd
BF		 3157 struct xdr_stream *xdr = &resp->xdr;
3158
bac966d6 3159 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
1da177e4
LT		 3160}
3161
3162
695e12f8 3163static __be32
b37ad28b 3164nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 3165{
d0a381dd 3166 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3167 __be32 *p;
1da177e4 3168
bac966d6
BF		 3169 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3170 if (!p)
3171 return nfserr_resource;
3172 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
0c0c267b 3173 NFS4_VERIFIER_SIZE);
bac966d6 3174 return 0;
1da177e4
LT		 3175}
3176
695e12f8 3177static __be32
b37ad28b 3178nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 3179{
d0a381dd 3180 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3181 __be32 *p;
1da177e4 3182
bac966d6
BF		 3183 p = xdr_reserve_space(xdr, 20);
3184 if (!p)
3185 return nfserr_resource;
3186 encode_cinfo(p, &create->cr_cinfo);
3187 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3188 create->cr_bmval[1], create->cr_bmval[2]);
3189 return 0;
1da177e4
LT		 3190}
3191
b37ad28b
AV		 3192static __be32
3193nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 3194{
3195 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 3196 struct xdr_stream *xdr = &resp->xdr;
1da177e4 3197
bac966d6
BF		 3198 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3199 getattr->ga_bmval, resp->rqstp, 0);
1da177e4
LT		 3200}
3201
695e12f8
BH		 3202static __be32
3203nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 3204{
d0a381dd 3205 struct xdr_stream *xdr = &resp->xdr;
695e12f8 3206 struct svc_fh *fhp = *fhpp;
1da177e4 3207 unsigned int len;
bc749ca4 3208 __be32 *p;
1da177e4 3209
bac966d6
BF		 3210 len = fhp->fh_handle.fh_size;
3211 p = xdr_reserve_space(xdr, len + 4);
3212 if (!p)
3213 return nfserr_resource;
3214 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3215 return 0;
1da177e4
LT		 3216}
3217
3218/*
3219* Including all fields other than the name, a LOCK4denied structure requires
3220* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3221*/
d0a381dd
BF		 3222static __be32
3223nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 3224{
7c13f344 3225 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 3226 __be32 *p;
1da177e4 3227
8c7424cf 3228again:
d0a381dd 3229 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 3230 if (!p) {
3231 /*
3232 * Don't fail to return the result just because we can't
3233 * return the conflicting open:
3234 */
3235 if (conf->len) {
f98bac5a 3236 kfree(conf->data);
8c7424cf
BF		 3237 conf->len = 0;
3238 conf->data = NULL;
3239 goto again;
3240 }
d0a381dd 3241 return nfserr_resource;
8c7424cf 3242 }
b64c7f3b
BF		 3243 p = xdr_encode_hyper(p, ld->ld_start);
3244 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 3245 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 3246 if (conf->len) {
0c0c267b
BF		 3247 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3248 p = xdr_encode_opaque(p, conf->data, conf->len);
f98bac5a 3249 kfree(conf->data);
1da177e4 3250 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 3251 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 3252 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 3253 }
d0a381dd 3254 return nfserr_denied;
1da177e4
LT		 3255}
3256
695e12f8 3257static __be32
b37ad28b 3258nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 3259{
d0a381dd
BF		 3260 struct xdr_stream *xdr = &resp->xdr;
3261
e2f282b9 3262 if (!nfserr)
d0a381dd 3263 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 3264 else if (nfserr == nfserr_denied)
d0a381dd 3265 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
f98bac5a 3266
695e12f8 3267 return nfserr;
1da177e4
LT		 3268}
3269
695e12f8 3270static __be32
b37ad28b 3271nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 3272{
d0a381dd
BF		 3273 struct xdr_stream *xdr = &resp->xdr;
3274
1da177e4 3275 if (nfserr == nfserr_denied)
d0a381dd 3276 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 3277 return nfserr;
1da177e4
LT		 3278}
3279
695e12f8 3280static __be32
b37ad28b 3281nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 3282{
d0a381dd
BF		 3283 struct xdr_stream *xdr = &resp->xdr;
3284
bac966d6 3285 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
1da177e4
LT		 3286}
3287
3288
695e12f8 3289static __be32
b37ad28b 3290nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 3291{
d0a381dd 3292 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3293 __be32 *p;
1da177e4 3294
bac966d6
BF		 3295 p = xdr_reserve_space(xdr, 20);
3296 if (!p)
3297 return nfserr_resource;
3298 p = encode_cinfo(p, &link->li_cinfo);
3299 return 0;
1da177e4
LT		 3300}
3301
3302
695e12f8 3303static __be32
b37ad28b 3304nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 3305{
d0a381dd 3306 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3307 __be32 *p;
1da177e4 3308
d0a381dd
BF		 3309 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3310 if (nfserr)
bac966d6 3311 return nfserr;
75976de6 3312 p = xdr_reserve_space(xdr, 24);
d0a381dd
BF		 3313 if (!p)
3314 return nfserr_resource;
d05d5744 3315 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4 3316 *p++ = cpu_to_be32(open->op_rflags);
1da177e4 3317
75976de6
KM		 3318 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3319 open->op_bmval[2]);
3320 if (nfserr)
bac966d6 3321 return nfserr;
75976de6
KM		 3322
3323 p = xdr_reserve_space(xdr, 4);
3324 if (!p)
3325 return nfserr_resource;
3326
3327 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 3328 switch (open->op_delegate_type) {
3329 case NFS4_OPEN_DELEGATE_NONE:
3330 break;
3331 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 3332 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3333 if (nfserr)
3334 return nfserr;
3335 p = xdr_reserve_space(xdr, 20);
3336 if (!p)
3337 return nfserr_resource;
c373b0a4 3338 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 3339
3340 /*
3341 * TODO: ACE's in delegations
3342 */
c373b0a4
BF		 3343 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3344 *p++ = cpu_to_be32(0);
3345 *p++ = cpu_to_be32(0);
3346 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 3347 break;
3348 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 3349 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3350 if (nfserr)
3351 return nfserr;
3352 p = xdr_reserve_space(xdr, 32);
3353 if (!p)
3354 return nfserr_resource;
c373b0a4 3355 *p++ = cpu_to_be32(0);
1da177e4
LT		 3356
3357 /*
3358 * TODO: space_limit's in delegations
3359 */
c373b0a4
BF		 3360 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3361 *p++ = cpu_to_be32(~(u32)0);
3362 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3363
3364 /*
3365 * TODO: ACE's in delegations
3366 */
c373b0a4
BF		 3367 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3368 *p++ = cpu_to_be32(0);
3369 *p++ = cpu_to_be32(0);
3370 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3371 break;
d24433cd
BH		 3372 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3373 switch (open->op_why_no_deleg) {
3374 case WND4_CONTENTION:
3375 case WND4_RESOURCE:
d0a381dd
BF		 3376 p = xdr_reserve_space(xdr, 8);
3377 if (!p)
3378 return nfserr_resource;
c373b0a4
BF		 3379 *p++ = cpu_to_be32(open->op_why_no_deleg);
3380 /* deleg signaling not supported yet: */
3381 *p++ = cpu_to_be32(0);
d24433cd
BH		 3382 break;
3383 default:
d0a381dd
BF		 3384 p = xdr_reserve_space(xdr, 4);
3385 if (!p)
3386 return nfserr_resource;
c373b0a4 3387 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3388 }
d24433cd 3389 break;
1da177e4
LT		 3390 default:
3391 BUG();
3392 }
3393 /* XXX save filehandle here */
bac966d6 3394 return 0;
1da177e4
LT		 3395}
3396
695e12f8 3397static __be32
b37ad28b 3398nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3399{
d0a381dd
BF		 3400 struct xdr_stream *xdr = &resp->xdr;
3401
bac966d6 3402 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4
LT		 3403}
3404
695e12f8 3405static __be32
b37ad28b 3406nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3407{
d0a381dd
BF		 3408 struct xdr_stream *xdr = &resp->xdr;
3409
bac966d6 3410 return nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4
LT		 3411}
3412
dc97618d
BF		 3413static __be32 nfsd4_encode_splice_read(
3414 struct nfsd4_compoundres *resp,
3415 struct nfsd4_read *read,
3416 struct file *file, unsigned long maxcount)
1da177e4 3417{
ddd1ea56 3418 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3419 struct xdr_buf *buf = xdr->buf;
dc97618d 3420 u32 eof;
ac503e4a 3421 long len;
30596768 3422 int space_left;
dc97618d 3423 __be32 nfserr;
fec25fa4 3424 __be32 *p = xdr->p - 2;
1da177e4 3425
d5d5c304
KM		 3426 /* Make sure there will be room for padding if needed */
3427 if (xdr->end - xdr->p < 1)
d0a381dd 3428 return nfserr_resource;
dc97618d 3429
ac503e4a 3430 len = maxcount;
dc97618d
BF		 3431 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3432 read->rd_offset, &maxcount);
3433 if (nfserr) {
3434 /*
3435 * nfsd_splice_actor may have already messed with the
3436 * page length; reset it so as not to confuse
3437 * xdr_truncate_encode:
3438 */
34a78b48 3439 buf->page_len = 0;
dc97618d 3440 return nfserr;
b0e35fda 3441 }
1da177e4 3442
ac503e4a
BC		 3443 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3444 d_inode(read->rd_fhp->fh_dentry)->i_size);
4e21ac4b 3445
fec25fa4
BF		 3446 *(p++) = htonl(eof);
3447 *(p++) = htonl(maxcount);
dc97618d 3448
34a78b48
BF		 3449 buf->page_len = maxcount;
3450 buf->len += maxcount;
15b23ef5
BF		 3451 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3452 / PAGE_SIZE;
dc97618d
BF		 3453
3454 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3455 buf->tail[0].iov_base = xdr->p;
3456 buf->tail[0].iov_len = 0;
fec25fa4 3457 xdr->iov = buf->tail;
dc97618d 3458 if (maxcount&3) {
fec25fa4
BF		 3459 int pad = 4 - (maxcount&3);
3460
3461 *(xdr->p++) = 0;
3462
34a78b48 3463 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3464 buf->tail[0].iov_len = pad;
3465 buf->len += pad;
b0e35fda 3466 }
2825a7f9 3467
dc97618d 3468 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3469 buf->buflen - buf->len);
3470 buf->buflen = buf->len + space_left;
dc97618d
BF		 3471 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3472
3473 return 0;
3474}
3475
3476static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3477 struct nfsd4_read *read,
3478 struct file *file, unsigned long maxcount)
3479{
3480 struct xdr_stream *xdr = &resp->xdr;
3481 u32 eof;
3482 int v;
dc97618d 3483 int starting_len = xdr->buf->len - 8;
dc97618d 3484 long len;
b0420980 3485 int thislen;
dc97618d
BF		 3486 __be32 nfserr;
3487 __be32 tmp;
3488 __be32 *p;
b0420980
BF		 3489 u32 zzz = 0;
3490 int pad;
1da177e4
LT		 3491
3492 len = maxcount;
3493 v = 0;
6ff9897d 3494
1055414f 3495 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
b0420980
BF		 3496 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3497 WARN_ON_ONCE(!p);
3498 resp->rqstp->rq_vec[v].iov_base = p;
3499 resp->rqstp->rq_vec[v].iov_len = thislen;
3500 v++;
3501 len -= thislen;
3502
3503 while (len) {
6ff9897d 3504 thislen = min_t(long, len, PAGE_SIZE);
b0420980
BF		 3505 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3506 WARN_ON_ONCE(!p);
3507 resp->rqstp->rq_vec[v].iov_base = p;
6ff9897d 3508 resp->rqstp->rq_vec[v].iov_len = thislen;
1da177e4 3509 v++;
6ff9897d 3510 len -= thislen;
1da177e4
LT		 3511 }
3512 read->rd_vlen = v;
3513
ac503e4a 3514 len = maxcount;
dc97618d
BF		 3515 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3516 read->rd_vlen, &maxcount);
3517 if (nfserr)
1da177e4 3518 return nfserr;
b0420980 3519 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
dc97618d 3520
ac503e4a
BC		 3521 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3522 d_inode(read->rd_fhp->fh_dentry)->i_size);
1da177e4 3523
dc97618d
BF		 3524 tmp = htonl(eof);
3525 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3526 tmp = htonl(maxcount);
3527 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3528
b0420980
BF		 3529 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3530 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3531 &zzz, pad);
1da177e4 3532 return 0;
dc97618d
BF		 3533
3534}
3535
3536static __be32
3537nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3538 struct nfsd4_read *read)
3539{
3540 unsigned long maxcount;
3541 struct xdr_stream *xdr = &resp->xdr;
3542 struct file *file = read->rd_filp;
3543 int starting_len = xdr->buf->len;
e749a462 3544 struct raparms *ra = NULL;
dc97618d 3545 __be32 *p;
dc97618d 3546
dc97618d
BF		 3547 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3548 if (!p) {
779fb0f3 3549 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
bac966d6 3550 return nfserr_resource;
dc97618d 3551 }
68e8bb03
CH		 3552 if (resp->xdr.buf->page_len &&
3553 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
b0420980 3554 WARN_ON_ONCE(1);
bac966d6 3555 return nfserr_resource;
dc97618d 3556 }
dc97618d
BF		 3557 xdr_commit_encode(xdr);
3558
3559 maxcount = svc_max_payload(resp->rqstp);
68e8bb03
CH		 3560 maxcount = min_t(unsigned long, maxcount,
3561 (xdr->buf->buflen - xdr->buf->len));
3c7aa15d 3562 maxcount = min_t(unsigned long, maxcount, read->rd_length);
dc97618d 3563
af90f707 3564 if (read->rd_tmp_file)
e749a462 3565 ra = nfsd_init_raparms(file);
dc97618d 3566
68e8bb03
CH		 3567 if (file->f_op->splice_read &&
3568 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
96bcad50 3569 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
dc97618d 3570 else
96bcad50 3571 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
dc97618d 3572
e749a462
CH		 3573 if (ra)
3574 nfsd_put_raparams(file, ra);
dc97618d 3575
96bcad50 3576 if (nfserr)
dc97618d 3577 xdr_truncate_encode(xdr, starting_len);
96bcad50 3578
96bcad50 3579 return nfserr;
1da177e4
LT		 3580}
3581
b37ad28b
AV		 3582static __be32
3583nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3584{
3585 int maxcount;
476a7b1f
BF		 3586 __be32 wire_count;
3587 int zero = 0;
ddd1ea56 3588 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3589 int length_offset = xdr->buf->len;
bc749ca4 3590 __be32 *p;
1da177e4 3591
2825a7f9
BF		 3592 p = xdr_reserve_space(xdr, 4);
3593 if (!p)
3594 return nfserr_resource;
1da177e4 3595 maxcount = PAGE_SIZE;
d0a381dd 3596
476a7b1f
BF		 3597 p = xdr_reserve_space(xdr, maxcount);
3598 if (!p)
4e21ac4b 3599 return nfserr_resource;
1da177e4 3600 /*
fd4a0edf
MS		 3601 * XXX: By default, vfs_readlink() will truncate symlinks if they
3602 * would overflow the buffer. Is this kosher in NFSv4? If not, one
3603 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
3604 * that truncation occurred, and return NFS4ERR_RESOURCE.
1da177e4 3605 */
476a7b1f
BF		 3606 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3607 (char *)p, &maxcount);
1da177e4 3608 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3609 nfserr = nfserr_inval;
3610 if (nfserr) {
1fcea5b2 3611 xdr_truncate_encode(xdr, length_offset);
1da177e4 3612 return nfserr;
d3f627c8 3613 }
1da177e4 3614
476a7b1f
BF		 3615 wire_count = htonl(maxcount);
3616 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
69bbd9c7 3617 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
476a7b1f
BF		 3618 if (maxcount & 3)
3619 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3620 &zero, 4 - (maxcount&3));
1da177e4
LT		 3621 return 0;
3622}
3623
b37ad28b
AV		 3624static __be32
3625nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3626{
3627 int maxcount;
561f0ed4 3628 int bytes_left;
1da177e4 3629 loff_t offset;
561f0ed4 3630 __be64 wire_offset;
ddd1ea56 3631 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3632 int starting_len = xdr->buf->len;
bc749ca4 3633 __be32 *p;
1da177e4 3634
d0a381dd
BF		 3635 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3636 if (!p)
3637 return nfserr_resource;
1da177e4
LT		 3638
3639 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 3640 *p++ = cpu_to_be32(0);
3641 *p++ = cpu_to_be32(0);
4aea24b2
BF		 3642 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3643 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3644
3645 /*
561f0ed4
BF		 3646 * Number of bytes left for directory entries allowing for the
3647 * final 8 bytes of the readdir and a following failed op:
3648 */
3649 bytes_left = xdr->buf->buflen - xdr->buf->len
3650 - COMPOUND_ERR_SLACK_SPACE - 8;
3651 if (bytes_left < 0) {
3652 nfserr = nfserr_resource;
3653 goto err_no_verf;
3654 }
3655 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3656 /*
3657 * Note the rfc defines rd_maxcount as the size of the
3658 * READDIR4resok structure, which includes the verifier above
3659 * and the 8 bytes encoded at the end of this function:
1da177e4 3660 */
561f0ed4
BF		 3661 if (maxcount < 16) {
3662 nfserr = nfserr_toosmall;
1da177e4
LT		 3663 goto err_no_verf;
3664 }
561f0ed4 3665 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3666
aee37764
BF		 3667 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3668 if (!readdir->rd_dircount)
3669 readdir->rd_dircount = INT_MAX;
3670
561f0ed4
BF		 3671 readdir->xdr = xdr;
3672 readdir->rd_maxcount = maxcount;
1da177e4 3673 readdir->common.err = 0;
561f0ed4 3674 readdir->cookie_offset = 0;
1da177e4
LT		 3675
3676 offset = readdir->rd_cookie;
3677 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3678 &offset,
3679 &readdir->common, nfsd4_encode_dirent);
3680 if (nfserr == nfs_ok &&
3681 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3682 xdr->buf->len == starting_len + 8) {
3683 /* nothing encoded; which limit did we hit?: */
3684 if (maxcount - 16 < bytes_left)
3685 /* It was the fault of rd_maxcount: */
3686 nfserr = nfserr_toosmall;
3687 else
3688 /* We ran out of buffer space: */
3689 nfserr = nfserr_resource;
3690 }
1da177e4
LT		 3691 if (nfserr)
3692 goto err_no_verf;
3693
561f0ed4
BF		 3694 if (readdir->cookie_offset) {
3695 wire_offset = cpu_to_be64(offset);
3696 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3697 &wire_offset, 8);
3698 }
1da177e4 3699
561f0ed4
BF		 3700 p = xdr_reserve_space(xdr, 8);
3701 if (!p) {
3702 WARN_ON_ONCE(1);
3703 goto err_no_verf;
3704 }
1da177e4
LT		 3705 *p++ = 0; /* no more entries */
3706 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3707
3708 return 0;
3709err_no_verf:
1fcea5b2 3710 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3711 return nfserr;
3712}
3713
695e12f8 3714static __be32
b37ad28b 3715nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3716{
d0a381dd 3717 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3718 __be32 *p;
1da177e4 3719
bac966d6
BF		 3720 p = xdr_reserve_space(xdr, 20);
3721 if (!p)
3722 return nfserr_resource;
3723 p = encode_cinfo(p, &remove->rm_cinfo);
3724 return 0;
1da177e4
LT		 3725}
3726
695e12f8 3727static __be32
b37ad28b 3728nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3729{
d0a381dd 3730 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3731 __be32 *p;
1da177e4 3732
bac966d6
BF		 3733 p = xdr_reserve_space(xdr, 40);
3734 if (!p)
3735 return nfserr_resource;
3736 p = encode_cinfo(p, &rename->rn_sinfo);
3737 p = encode_cinfo(p, &rename->rn_tinfo);
3738 return 0;
1da177e4
LT		 3739}
3740
695e12f8 3741static __be32
bac966d6 3742nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
dcb488a3 3743{
676e4ebd 3744 u32 i, nflavs, supported;
4796f457
BF		 3745 struct exp_flavor_info *flavs;
3746 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3747 __be32 *p, *flavorsp;
3748 static bool report = true;
dcb488a3 3749
4796f457
BF		 3750 if (exp->ex_nflavors) {
3751 flavs = exp->ex_flavors;
3752 nflavs = exp->ex_nflavors;
3753 } else { /* Handling of some defaults in absence of real secinfo: */
3754 flavs = def_flavs;
3755 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3756 nflavs = 2;
3757 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3758 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3759 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3760 nflavs = 1;
3761 flavs[0].pseudoflavor
3762 = svcauth_gss_flavor(exp->ex_client);
3763 } else {
3764 nflavs = 1;
3765 flavs[0].pseudoflavor
3766 = exp->ex_client->flavour->flavour;
3767 }
3768 }
3769
676e4ebd 3770 supported = 0;
d0a381dd
BF		 3771 p = xdr_reserve_space(xdr, 4);
3772 if (!p)
bac966d6 3773 return nfserr_resource;
676e4ebd 3774 flavorsp = p++; /* to be backfilled later */
676e4ebd 3775
4796f457 3776 for (i = 0; i < nflavs; i++) {
676e4ebd 3777 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3778 struct rpcsec_gss_info info;
dcb488a3 3779
676e4ebd
CL		 3780 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3781 supported++;
d0a381dd
BF		 3782 p = xdr_reserve_space(xdr, 4 + 4 +
3783 XDR_LEN(info.oid.len) + 4 + 4);
3784 if (!p)
bac966d6 3785 return nfserr_resource;
c373b0a4 3786 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 3787 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 3788 *p++ = cpu_to_be32(info.qop);
3789 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 3790 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3791 supported++;
d0a381dd
BF		 3792 p = xdr_reserve_space(xdr, 4);
3793 if (!p)
bac966d6 3794 return nfserr_resource;
c373b0a4 3795 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 3796 } else {
3797 if (report)
3798 pr_warn("NFS: SECINFO: security flavor %u "
3799 "is not supported\n", pf);
dcb488a3
AA		 3800 }
3801 }
a77c806f 3802
676e4ebd
CL		 3803 if (nflavs != supported)
3804 report = false;
3805 *flavorsp = htonl(supported);
bac966d6 3806 return 0;
dcb488a3
AA		 3807}
3808
22b6dee8
MJ		 3809static __be32
3810nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3811 struct nfsd4_secinfo *secinfo)
3812{
d0a381dd
BF		 3813 struct xdr_stream *xdr = &resp->xdr;
3814
bac966d6 3815 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
22b6dee8
MJ		 3816}
3817
3818static __be32
3819nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3820 struct nfsd4_secinfo_no_name *secinfo)
3821{
d0a381dd
BF		 3822 struct xdr_stream *xdr = &resp->xdr;
3823
bac966d6 3824 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
22b6dee8
MJ		 3825}
3826
1da177e4
LT		 3827/*
3828 * The SETATTR encode routine is special -- it always encodes a bitmap,
3829 * regardless of the error status.
3830 */
695e12f8 3831static __be32
b37ad28b 3832nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3833{
d0a381dd 3834 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3835 __be32 *p;
1da177e4 3836
d0a381dd
BF		 3837 p = xdr_reserve_space(xdr, 16);
3838 if (!p)
3839 return nfserr_resource;
1da177e4 3840 if (nfserr) {
c373b0a4
BF		 3841 *p++ = cpu_to_be32(3);
3842 *p++ = cpu_to_be32(0);
3843 *p++ = cpu_to_be32(0);
3844 *p++ = cpu_to_be32(0);
1da177e4
LT		 3845 }
3846 else {
c373b0a4
BF		 3847 *p++ = cpu_to_be32(3);
3848 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3849 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3850 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 3851 }
695e12f8 3852 return nfserr;
1da177e4
LT		 3853}
3854
695e12f8 3855static __be32
b37ad28b 3856nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3857{
d0a381dd 3858 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3859 __be32 *p;
1da177e4
LT		 3860
3861 if (!nfserr) {
d0a381dd
BF		 3862 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3863 if (!p)
3864 return nfserr_resource;
0c0c267b
BF		 3865 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3866 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3867 NFS4_VERIFIER_SIZE);
1da177e4
LT		 3868 }
3869 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3870 p = xdr_reserve_space(xdr, 8);
3871 if (!p)
3872 return nfserr_resource;
c373b0a4
BF		 3873 *p++ = cpu_to_be32(0);
3874 *p++ = cpu_to_be32(0);
1da177e4 3875 }
695e12f8 3876 return nfserr;
1da177e4
LT		 3877}
3878
695e12f8 3879static __be32
b37ad28b 3880nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3881{
d0a381dd 3882 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3883 __be32 *p;
1da177e4 3884
bac966d6
BF		 3885 p = xdr_reserve_space(xdr, 16);
3886 if (!p)
3887 return nfserr_resource;
3888 *p++ = cpu_to_be32(write->wr_bytes_written);
3889 *p++ = cpu_to_be32(write->wr_how_written);
3890 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3891 NFS4_VERIFIER_SIZE);
3892 return 0;
1da177e4
LT		 3893}
3894
2db134eb 3895static __be32
57b7b43b 3896nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3897 struct nfsd4_exchange_id *exid)
3898{
d0a381dd 3899 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3900 __be32 *p;
0733d213
AA		 3901 char *major_id;
3902 char *server_scope;
3903 int major_id_sz;
3904 int server_scope_sz;
3905 uint64_t minor_id = 0;
3906
0733d213
AA		 3907 major_id = utsname()->nodename;
3908 major_id_sz = strlen(major_id);
3909 server_scope = utsname()->nodename;
3910 server_scope_sz = strlen(server_scope);
3911
d0a381dd 3912 p = xdr_reserve_space(xdr,
0733d213
AA		 3913 8 /* eir_clientid */ +
3914 4 /* eir_sequenceid */ +
3915 4 /* eir_flags */ +
a8bb84bc 3916 4 /* spr_how */);
d0a381dd
BF		 3917 if (!p)
3918 return nfserr_resource;
0733d213 3919
0c0c267b 3920 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 3921 *p++ = cpu_to_be32(exid->seqid);
3922 *p++ = cpu_to_be32(exid->flags);
0733d213 3923
c373b0a4 3924 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 3925
57266a6e
BF		 3926 switch (exid->spa_how) {
3927 case SP4_NONE:
3928 break;
3929 case SP4_MACH_CRED:
3930 /* spo_must_enforce bitmap: */
bac966d6 3931 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 3932 exid->spo_must_enforce[0],
3933 exid->spo_must_enforce[1],
3934 exid->spo_must_enforce[2]);
bac966d6
BF		 3935 if (nfserr)
3936 return nfserr;
ed941643 3937 /* spo_must_allow bitmap: */
bac966d6 3938 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 3939 exid->spo_must_allow[0],
3940 exid->spo_must_allow[1],
3941 exid->spo_must_allow[2]);
bac966d6
BF		 3942 if (nfserr)
3943 return nfserr;
57266a6e
BF		 3944 break;
3945 default:
3946 WARN_ON_ONCE(1);
3947 }
0733d213 3948
d0a381dd 3949 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3950 8 /* so_minor_id */ +
3951 4 /* so_major_id.len */ +
3952 (XDR_QUADLEN(major_id_sz) * 4) +
3953 4 /* eir_server_scope.len */ +
3954 (XDR_QUADLEN(server_scope_sz) * 4) +
3955 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3956 if (!p)
3957 return nfserr_resource;
a8bb84bc 3958
0733d213 3959 /* The server_owner struct */
b64c7f3b 3960 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 3961 /* major id */
0c0c267b 3962 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 3963
3964 /* Server scope */
0c0c267b 3965 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 3966
3967 /* Implementation id */
c373b0a4 3968 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 3969 return 0;
2db134eb
AA		 3970}
3971
3972static __be32
57b7b43b 3973nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3974 struct nfsd4_create_session *sess)
3975{
d0a381dd 3976 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3977 __be32 *p;
ec6b5d7b 3978
d0a381dd
BF		 3979 p = xdr_reserve_space(xdr, 24);
3980 if (!p)
3981 return nfserr_resource;
0c0c267b
BF		 3982 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3983 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3984 *p++ = cpu_to_be32(sess->seqid);
3985 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 3986
d0a381dd
BF		 3987 p = xdr_reserve_space(xdr, 28);
3988 if (!p)
3989 return nfserr_resource;
c373b0a4
BF		 3990 *p++ = cpu_to_be32(0); /* headerpadsz */
3991 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3992 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3993 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3994 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3995 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3996 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3997
3998 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 3999 p = xdr_reserve_space(xdr, 4);
4000 if (!p)
4001 return nfserr_resource;
c373b0a4 4002 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 4003 }
4004
d0a381dd
BF		 4005 p = xdr_reserve_space(xdr, 28);
4006 if (!p)
4007 return nfserr_resource;
c373b0a4
BF		 4008 *p++ = cpu_to_be32(0); /* headerpadsz */
4009 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4010 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4011 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4012 *p++ = cpu_to_be32(sess->back_channel.maxops);
4013 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4014 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4015
4016 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 4017 p = xdr_reserve_space(xdr, 4);
4018 if (!p)
4019 return nfserr_resource;
c373b0a4 4020 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 4021 }
4022 return 0;
2db134eb
AA		 4023}
4024
c47d832b 4025static __be32
57b7b43b 4026nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4027 struct nfsd4_sequence *seq)
4028{
d0a381dd 4029 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4030 __be32 *p;
b85d4c01 4031
d0a381dd
BF		 4032 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4033 if (!p)
4034 return nfserr_resource;
0c0c267b
BF		 4035 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4036 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4037 *p++ = cpu_to_be32(seq->seqid);
4038 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 4039 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 4040 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4041 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4042 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 4043
f5236013 4044 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 4045 return 0;
2db134eb
AA		 4046}
4047
2355c596 4048static __be32
57b7b43b 4049nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 4050 struct nfsd4_test_stateid *test_stateid)
4051{
d0a381dd 4052 struct xdr_stream *xdr = &resp->xdr;
03cfb420 4053 struct nfsd4_test_stateid_id *stateid, *next;
17456804 4054 __be32 *p;
17456804 4055
d0a381dd
BF		 4056 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4057 if (!p)
4058 return nfserr_resource;
17456804 4059 *p++ = htonl(test_stateid->ts_num_ids);
17456804 4060
03cfb420 4061 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 4062 *p++ = stateid->ts_id_status;
17456804 4063 }
17456804 4064
bac966d6 4065 return 0;
17456804
BS		 4066}
4067
9cf514cc
CH		 4068#ifdef CONFIG_NFSD_PNFS
4069static __be32
4070nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4071 struct nfsd4_getdeviceinfo *gdev)
4072{
4073 struct xdr_stream *xdr = &resp->xdr;
f961e3f2 4074 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4075 u32 starting_len = xdr->buf->len, needed_len;
4076 __be32 *p;
4077
9cf514cc
CH		 4078 p = xdr_reserve_space(xdr, 4);
4079 if (!p)
bac966d6 4080 return nfserr_resource;
9cf514cc
CH		 4081
4082 *p++ = cpu_to_be32(gdev->gd_layout_type);
4083
4084 /* If maxcount is 0 then just update notifications */
4085 if (gdev->gd_maxcount != 0) {
f961e3f2 4086 ops = nfsd4_layout_ops[gdev->gd_layout_type];
9cf514cc
CH		 4087 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4088 if (nfserr) {
4089 /*
4090 * We don't bother to burden the layout drivers with
4091 * enforcing gd_maxcount, just tell the client to
4092 * come back with a bigger buffer if it's not enough.
4093 */
4094 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4095 goto toosmall;
bac966d6 4096 return nfserr;
9cf514cc
CH		 4097 }
4098 }
4099
9cf514cc
CH		 4100 if (gdev->gd_notify_types) {
4101 p = xdr_reserve_space(xdr, 4 + 4);
4102 if (!p)
bac966d6 4103 return nfserr_resource;
9cf514cc
CH		 4104 *p++ = cpu_to_be32(1); /* bitmap length */
4105 *p++ = cpu_to_be32(gdev->gd_notify_types);
4106 } else {
4107 p = xdr_reserve_space(xdr, 4);
4108 if (!p)
bac966d6 4109 return nfserr_resource;
9cf514cc
CH		 4110 *p++ = 0;
4111 }
4112
bac966d6 4113 return 0;
9cf514cc
CH		 4114toosmall:
4115 dprintk("%s: maxcount too small\n", __func__);
4116 needed_len = xdr->buf->len + 4 /* notifications */;
4117 xdr_truncate_encode(xdr, starting_len);
4118 p = xdr_reserve_space(xdr, 4);
bac966d6
BF		 4119 if (!p)
4120 return nfserr_resource;
4121 *p++ = cpu_to_be32(needed_len);
4122 return nfserr_toosmall;
9cf514cc
CH		 4123}
4124
4125static __be32
4126nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4127 struct nfsd4_layoutget *lgp)
4128{
4129 struct xdr_stream *xdr = &resp->xdr;
f961e3f2 4130 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4131 __be32 *p;
4132
9cf514cc
CH		 4133 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4134 if (!p)
bac966d6 4135 return nfserr_resource;
9cf514cc
CH		 4136
4137 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4138 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4139 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4140 sizeof(stateid_opaque_t));
4141
4142 *p++ = cpu_to_be32(1); /* we always return a single layout */
4143 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4144 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4145 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4146 *p++ = cpu_to_be32(lgp->lg_layout_type);
4147
f961e3f2 4148 ops = nfsd4_layout_ops[lgp->lg_layout_type];
bac966d6 4149 return ops->encode_layoutget(xdr, lgp);
9cf514cc
CH		 4150}
4151
4152static __be32
4153nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4154 struct nfsd4_layoutcommit *lcp)
4155{
4156 struct xdr_stream *xdr = &resp->xdr;
4157 __be32 *p;
4158
9cf514cc
CH		 4159 p = xdr_reserve_space(xdr, 4);
4160 if (!p)
4161 return nfserr_resource;
4162 *p++ = cpu_to_be32(lcp->lc_size_chg);
4163 if (lcp->lc_size_chg) {
4164 p = xdr_reserve_space(xdr, 8);
4165 if (!p)
4166 return nfserr_resource;
4167 p = xdr_encode_hyper(p, lcp->lc_newsize);
4168 }
4169
bac966d6 4170 return 0;
9cf514cc
CH		 4171}
4172
4173static __be32
4174nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4175 struct nfsd4_layoutreturn *lrp)
4176{
4177 struct xdr_stream *xdr = &resp->xdr;
4178 __be32 *p;
4179
9cf514cc
CH		 4180 p = xdr_reserve_space(xdr, 4);
4181 if (!p)
4182 return nfserr_resource;
4183 *p++ = cpu_to_be32(lrp->lrs_present);
4184 if (lrp->lrs_present)
376675da 4185 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
bac966d6 4186 return 0;
9cf514cc
CH		 4187}
4188#endif /* CONFIG_NFSD_PNFS */
4189
29ae7f9d
AS		 4190static __be32
4191nfsd42_encode_write_res(struct nfsd4_compoundres *resp, struct nfsd42_write_res *write)
4192{
4193 __be32 *p;
4194
4195 p = xdr_reserve_space(&resp->xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE);
4196 if (!p)
4197 return nfserr_resource;
4198
4199 *p++ = cpu_to_be32(0);
4200 p = xdr_encode_hyper(p, write->wr_bytes_written);
4201 *p++ = cpu_to_be32(write->wr_stable_how);
4202 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4203 NFS4_VERIFIER_SIZE);
4204 return nfs_ok;
4205}
4206
4207static __be32
4208nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4209 struct nfsd4_copy *copy)
4210{
4211 __be32 *p;
4212
bac966d6
BF		 4213 nfserr = nfsd42_encode_write_res(resp, &copy->cp_res);
4214 if (nfserr)
4215 return nfserr;
29ae7f9d 4216
bac966d6
BF		 4217 p = xdr_reserve_space(&resp->xdr, 4 + 4);
4218 *p++ = cpu_to_be32(copy->cp_consecutive);
4219 *p++ = cpu_to_be32(copy->cp_synchronous);
4220 return 0;
29ae7f9d
AS		 4221}
4222
24bab491
AS		 4223static __be32
4224nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4225 struct nfsd4_seek *seek)
4226{
4227 __be32 *p;
4228
24bab491
AS		 4229 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4230 *p++ = cpu_to_be32(seek->seek_eof);
4231 p = xdr_encode_hyper(p, seek->seek_pos);
4232
bac966d6 4233 return 0;
24bab491
AS		 4234}
4235
695e12f8
BH		 4236static __be32
4237nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4238{
4239 return nfserr;
4240}
4241
4242typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4243
2db134eb
AA		 4244/*
4245 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4246 * since we don't need to filter out obsolete ops as this is
4247 * done in the decoding phase.
4248 */
c1df609d 4249static const nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 4250 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4251 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4252 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4253 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4254 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4255 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4256 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4257 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4258 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4259 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4260 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4261 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4262 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4263 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4264 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4265 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 4266 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 4267 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4268 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4269 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4270 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4271 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4272 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4273 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4274 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4275 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4276 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4277 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4278 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4279 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4280 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4281 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4282 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4283 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4284 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4285 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4286 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 4287
4288 /* NFSv4.1 operations */
4289 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 4290 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 4291 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4292 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 4293 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4294 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb 4295 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc
CH		 4296#ifdef CONFIG_NFSD_PNFS
4297 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4298 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4299 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4300 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4301 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4302#else
2db134eb
AA		 4303 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4304 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4305 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4306 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4307 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc 4308#endif
22b6dee8 4309 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 4310 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4311 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 4312 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 4313 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4314 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4315 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
87a15a80
AS		 4316
4317 /* NFSv4.2 operations */
4318 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
29ae7f9d 4319 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
87a15a80
AS		 4320 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4321 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4322 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4323 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4324 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4325 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4326 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4327 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
24bab491 4328 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
87a15a80 4329 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
ffa0160a 4330 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 4331};
4332
496c262c 4333/*
a8095f7e
BF		 4334 * Calculate whether we still have space to encode repsize bytes.
4335 * There are two considerations:
4336 * - For NFS versions >=4.1, the size of the reply must stay within
4337 * session limits
4338 * - For all NFS versions, we must stay within limited preallocated
4339 * buffer space.
496c262c 4340 *
a8095f7e
BF		 4341 * This is called before the operation is processed, so can only provide
4342 * an upper estimate. For some nonidempotent operations (such as
4343 * getattr), it's not necessarily a problem if that estimate is wrong,
4344 * as we can fail it after processing without significant side effects.
496c262c 4345 */
a8095f7e 4346__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 4347{
67492c99 4348 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 4349 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 4350
47ee5298
BF		 4351 if (buf->len + respsize <= buf->buflen)
4352 return nfs_ok;
4353 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 4354 return nfserr_resource;
47ee5298
BF		 4355 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4356 WARN_ON_ONCE(1);
4357 return nfserr_rep_too_big_to_cache;
ea8d7720 4358 }
47ee5298 4359 return nfserr_rep_too_big;
496c262c
AA		 4360}
4361
1da177e4
LT		 4362void
4363nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4364{
082d4bd7 4365 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 4366 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 4367 struct svc_rqst *rqstp = resp->rqstp;
34b1744c 4368 const struct nfsd4_operation *opdesc = op->opdesc;
082d4bd7 4369 int post_err_offset;
07d1f802 4370 nfsd4_enc encoder;
bc749ca4 4371 __be32 *p;
1da177e4 4372
d0a381dd
BF		 4373 p = xdr_reserve_space(xdr, 8);
4374 if (!p) {
4375 WARN_ON_ONCE(1);
4376 return;
4377 }
c373b0a4 4378 *p++ = cpu_to_be32(op->opnum);
082d4bd7 4379 post_err_offset = xdr->buf->len;
1da177e4 4380
695e12f8
BH		 4381 if (op->opnum == OP_ILLEGAL)
4382 goto status;
b7571e4c
BF		 4383 if (op->status && opdesc &&
4384 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
4385 goto status;
695e12f8
BH		 4386 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4387 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 4388 encoder = nfsd4_enc_ops[op->opnum];
4389 op->status = encoder(resp, op->status, &op->u);
34b1744c
BF		 4390 if (opdesc && opdesc->op_release)
4391 opdesc->op_release(&op->u);
2825a7f9
BF		 4392 xdr_commit_encode(xdr);
4393
067e1ace 4394 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 4395 if (!op->status) {
4396 int space_needed = 0;
4397 if (!nfsd4_last_compound_op(rqstp))
4398 space_needed = COMPOUND_ERR_SLACK_SPACE;
4399 op->status = nfsd4_check_resp_size(resp, space_needed);
4400 }
c8f13d97
BF		 4401 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4402 struct nfsd4_slot *slot = resp->cstate.slot;
4403
4404 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4405 op->status = nfserr_rep_too_big_to_cache;
4406 else
4407 op->status = nfserr_rep_too_big;
4408 }
07d1f802
BF		 4409 if (op->status == nfserr_resource ||
4410 op->status == nfserr_rep_too_big ||
4411 op->status == nfserr_rep_too_big_to_cache) {
4412 /*
4413 * The operation may have already been encoded or
4414 * partially encoded. No op returns anything additional
4415 * in the case of one of these three errors, so we can
4416 * just truncate back to after the status. But it's a
4417 * bug if we had to do this on a non-idempotent op:
4418 */
4419 warn_on_nonidempotent_op(op);
082d4bd7 4420 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 4421 }
9411b1d4 4422 if (so) {
082d4bd7
BF		 4423 int len = xdr->buf->len - post_err_offset;
4424
9411b1d4 4425 so->so_replay.rp_status = op->status;
082d4bd7
BF		 4426 so->so_replay.rp_buflen = len;
4427 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4428 so->so_replay.rp_buf, len);
9411b1d4 4429 }
695e12f8 4430status:
082d4bd7
BF		 4431 /* Note that op->status is already in network byte order: */
4432 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 4433}
4434
4435/*
4436 * Encode the reply stored in the stateowner reply cache
4437 *
4438 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4439 * previously sent already encoded operation.
1da177e4
LT		 4440 */
4441void
d0a381dd 4442nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 4443{
bc749ca4 4444 __be32 *p;
1da177e4
LT		 4445 struct nfs4_replay *rp = op->replay;
4446
4447 BUG_ON(!rp);
4448
d0a381dd
BF		 4449 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4450 if (!p) {
4451 WARN_ON_ONCE(1);
4452 return;
4453 }
c373b0a4 4454 *p++ = cpu_to_be32(op->opnum);
1da177e4 4455 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 4456
0c0c267b 4457 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 4458}
4459
1da177e4 4460int
63f8de37 4461nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
1da177e4
LT		 4462{
4463 return xdr_ressize_check(rqstp, p);
4464}
4465
8537488b 4466void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
1da177e4 4467{
3e98abff
BF		 4468 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4469
1da177e4
LT		 4470 if (args->ops != args->iops) {
4471 kfree(args->ops);
4472 args->ops = args->iops;
4473 }
f99d49ad
JJ		 4474 kfree(args->tmpp);
4475 args->tmpp = NULL;
1da177e4 4476 while (args->to_free) {
d5e23383 4477 struct svcxdr_tmpbuf *tb = args->to_free;
1da177e4 4478 args->to_free = tb->next;
1da177e4
LT		 4479 kfree(tb);
4480 }
4481}
4482
4483int
026fec7e 4484nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
1da177e4 4485{
026fec7e
CH		 4486 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4487
e874f9f8
JL		 4488 if (rqstp->rq_arg.head[0].iov_len % 4) {
4489 /* client is nuts */
4490 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4491 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4492 return 0;
4493 }
1da177e4
LT		 4494 args->p = p;
4495 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4496 args->pagelist = rqstp->rq_arg.pages;
4497 args->pagelen = rqstp->rq_arg.page_len;
eae03e2a 4498 args->tail = false;
1da177e4
LT		 4499 args->tmpp = NULL;
4500 args->to_free = NULL;
4501 args->ops = args->iops;
4502 args->rqstp = rqstp;
4503
3e98abff 4504 return !nfsd4_decode_compound(args);
1da177e4
LT		 4505}
4506
4507int
63f8de37 4508nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
1da177e4
LT		 4509{
4510 /*
4511 * All that remains is to write the tag and operation count...
4512 */
63f8de37 4513 struct nfsd4_compoundres *resp = rqstp->rq_resp;
6ac90391
BF		 4514 struct xdr_buf *buf = resp->xdr.buf;
4515
4516 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4517 buf->tail[0].iov_len);
dd97fdde 4518
2825a7f9
BF		 4519 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4520
1da177e4
LT		 4521 p = resp->tagp;
4522 *p++ = htonl(resp->taglen);
4523 memcpy(p, resp->tag, resp->taglen);
4524 p += XDR_QUADLEN(resp->taglen);
4525 *p++ = htonl(resp->opcnt);
4526
b607664e 4527 nfsd4_sequence_done(resp);
1da177e4
LT		 4528 return 1;
4529}
4530
4531/*
4532 * Local variables:
4533 * c-basic-offset: 8
4534 * End:
4535 */
Linux 6.x block layer and io_uring tree(s)