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nfsd4: fix xdr4 inclusion of escaped char
[mirror_ubuntu-artful-kernel.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1da177e4
LT		 34 */
35
5a0e3ad6 36#include <linux/slab.h>
1da177e4 37#include <linux/namei.h>
341eb184 38#include <linux/statfs.h>
0733d213 39#include <linux/utsname.h>
17456804 40#include <linux/pagemap.h>
4796f457 41#include <linux/sunrpc/svcauth_gss.h>
9a74af21 42
2ca72e17
BF		 43#include "idmap.h"
44#include "acl.h"
9a74af21 45#include "xdr4.h"
0a3adade 46#include "vfs.h"
17456804 47#include "state.h"
1091006c 48#include "cache.h"
3d733711 49#include "netns.h"
2ca72e17 50
18032ca0
DQ		 51#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
52#include <linux/security.h>
53#endif
54
55
1da177e4
LT		 56#define NFSDDBG_FACILITY NFSDDBG_XDR
57
42ca0993
BF		 58/*
59 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
60 * directory in order to indicate to the client that a filesystem boundary is present
61 * We use a fixed fsid for a referral
62 */
63#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
64#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
65
b37ad28b 66static __be32
a36b1725 67check_filename(char *str, int len)
1da177e4
LT		 68{
69 int i;
70
71 if (len == 0)
72 return nfserr_inval;
73 if (isdotent(str, len))
a36b1725 74 return nfserr_badname;
1da177e4
LT		 75 for (i = 0; i < len; i++)
76 if (str[i] == '/')
a36b1725 77 return nfserr_badname;
1da177e4
LT		 78 return 0;
79}
80
1da177e4 81#define DECODE_HEAD \
2ebbc012 82 __be32 *p; \
b37ad28b 83 __be32 status
1da177e4
LT		 84#define DECODE_TAIL \
85 status = 0; \
86out: \
87 return status; \
88xdr_error: \
817cb9d4
CL		 89 dprintk("NFSD: xdr error (%s:%d)\n", \
90 __FILE__, __LINE__); \
1da177e4
LT		 91 status = nfserr_bad_xdr; \
92 goto out
93
1da177e4
LT		 94#define READMEM(x,nbytes) do { \
95 x = (char *)p; \
96 p += XDR_QUADLEN(nbytes); \
97} while (0)
98#define SAVEMEM(x,nbytes) do { \
99 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
100 savemem(argp, p, nbytes) : \
101 (char *)p)) { \
817cb9d4
CL		 102 dprintk("NFSD: xdr error (%s:%d)\n", \
103 __FILE__, __LINE__); \
1da177e4
LT		 104 goto xdr_error; \
105 } \
106 p += XDR_QUADLEN(nbytes); \
107} while (0)
108#define COPYMEM(x,nbytes) do { \
109 memcpy((x), p, nbytes); \
110 p += XDR_QUADLEN(nbytes); \
111} while (0)
112
113/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
114#define READ_BUF(nbytes) do { \
115 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
116 p = argp->p; \
117 argp->p += XDR_QUADLEN(nbytes); \
118 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 119 dprintk("NFSD: xdr error (%s:%d)\n", \
120 __FILE__, __LINE__); \
1da177e4
LT		 121 goto xdr_error; \
122 } \
123} while (0)
124
590b7431
BF		 125static void next_decode_page(struct nfsd4_compoundargs *argp)
126{
590b7431 127 argp->p = page_address(argp->pagelist[0]);
365da4ad 128 argp->pagelist++;
590b7431
BF		 129 if (argp->pagelen < PAGE_SIZE) {
130 argp->end = argp->p + (argp->pagelen>>2);
131 argp->pagelen = 0;
132 } else {
133 argp->end = argp->p + (PAGE_SIZE>>2);
134 argp->pagelen -= PAGE_SIZE;
135 }
136}
137
ca2a05aa 138static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 139{
140 /* We want more bytes than seem to be available.
141 * Maybe we need a new page, maybe we have just run out
142 */
ca2a05aa 143 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 144 __be32 *p;
1da177e4
LT		 145 if (avail + argp->pagelen < nbytes)
146 return NULL;
147 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
148 return NULL;
149 /* ok, we can do it with the current plus the next page */
150 if (nbytes <= sizeof(argp->tmp))
151 p = argp->tmp;
152 else {
f99d49ad 153 kfree(argp->tmpp);
1da177e4
LT		 154 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
155 if (!p)
156 return NULL;
157
158 }
ca2a05aa
BF		 159 /*
160 * The following memcpy is safe because read_buf is always
161 * called with nbytes > avail, and the two cases above both
162 * guarantee p points to at least nbytes bytes.
163 */
1da177e4 164 memcpy(p, argp->p, avail);
590b7431 165 next_decode_page(argp);
1da177e4
LT		 166 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
167 argp->p += XDR_QUADLEN(nbytes - avail);
168 return p;
169}
170
60adfc50
AA		 171static int zero_clientid(clientid_t *clid)
172{
173 return (clid->cl_boot == 0) && (clid->cl_id == 0);
174}
175
2d8498db 176/**
d5e23383 177 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
ce043ac8
BF		 178 * @argp: NFSv4 compound argument structure
179 * @p: pointer to be freed (with kfree())
2d8498db
CH		 180 *
181 * Marks @p to be freed when processing the compound operation
182 * described in @argp finishes.
183 */
d5e23383
BF		 184static void *
185svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
1da177e4 186{
d5e23383 187 struct svcxdr_tmpbuf *tb;
1da177e4 188
d5e23383 189 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
1da177e4 190 if (!tb)
d5e23383 191 return NULL;
1da177e4
LT		 192 tb->next = argp->to_free;
193 argp->to_free = tb;
d5e23383 194 return tb->buf;
1da177e4
LT		 195}
196
29c353b3
BF		 197/*
198 * For xdr strings that need to be passed to other kernel api's
199 * as null-terminated strings.
200 *
201 * Note null-terminating in place usually isn't safe since the
202 * buffer might end on a page boundary.
203 */
204static char *
205svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
206{
d5e23383 207 char *p = svcxdr_tmpalloc(argp, len + 1);
29c353b3
BF		 208
209 if (!p)
210 return NULL;
211 memcpy(p, buf, len);
212 p[len] = '\0';
29c353b3 213 return p;
1da177e4
LT		 214}
215
2d8498db
CH		 216/**
217 * savemem - duplicate a chunk of memory for later processing
218 * @argp: NFSv4 compound argument structure to be freed with
219 * @p: pointer to be duplicated
220 * @nbytes: length to be duplicated
221 *
222 * Returns a pointer to a copy of @nbytes bytes of memory at @p
223 * that are preserved until processing of the NFSv4 compound
224 * operation described by @argp finishes.
225 */
2ebbc012 226static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 227{
d5e23383
BF		 228 void *ret;
229
230 ret = svcxdr_tmpalloc(argp, nbytes);
231 if (!ret)
1da177e4 232 return NULL;
d5e23383
BF		 233 memcpy(ret, p, nbytes);
234 return ret;
1da177e4
LT		 235}
236
b37ad28b 237static __be32
1da177e4
LT		 238nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
239{
240 u32 bmlen;
241 DECODE_HEAD;
242
243 bmval[0] = 0;
244 bmval[1] = 0;
7e705706 245 bmval[2] = 0;
1da177e4
LT		 246
247 READ_BUF(4);
06553991 248 bmlen = be32_to_cpup(p++);
1da177e4
LT		 249 if (bmlen > 1000)
250 goto xdr_error;
251
252 READ_BUF(bmlen << 2);
253 if (bmlen > 0)
06553991 254 bmval[0] = be32_to_cpup(p++);
1da177e4 255 if (bmlen > 1)
06553991 256 bmval[1] = be32_to_cpup(p++);
7e705706 257 if (bmlen > 2)
06553991 258 bmval[2] = be32_to_cpup(p++);
1da177e4
LT		 259
260 DECODE_TAIL;
261}
262
b37ad28b 263static __be32
3c8e0316 264nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0
DQ		 265 struct iattr *iattr, struct nfs4_acl **acl,
266 struct xdr_netobj *label)
1da177e4
LT		 267{
268 int expected_len, len = 0;
269 u32 dummy32;
542d1ab3 270 u64 sec;
1da177e4
LT		 271 char *buf;
272
273 DECODE_HEAD;
274 iattr->ia_valid = 0;
275 if ((status = nfsd4_decode_bitmap(argp, bmval)))
276 return status;
277
1da177e4 278 READ_BUF(4);
06553991 279 expected_len = be32_to_cpup(p++);
1da177e4
LT		 280
281 if (bmval[0] & FATTR4_WORD0_SIZE) {
282 READ_BUF(8);
283 len += 8;
542d1ab3 284 p = xdr_decode_hyper(p, &iattr->ia_size);
1da177e4
LT		 285 iattr->ia_valid |= ATTR_SIZE;
286 }
287 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 288 u32 nace;
28e05dd8 289 struct nfs4_ace *ace;
1da177e4
LT		 290
291 READ_BUF(4); len += 4;
06553991 292 nace = be32_to_cpup(p++);
1da177e4 293
28e05dd8 294 if (nace > NFS4_ACL_MAX)
798df338 295 return nfserr_fbig;
28e05dd8 296
d5e23383 297 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
eba1c99c
KM		 298 if (*acl == NULL)
299 return nfserr_jukebox;
300
28e05dd8
BF		 301 (*acl)->naces = nace;
302 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 303 READ_BUF(16); len += 16;
06553991
BF		 304 ace->type = be32_to_cpup(p++);
305 ace->flag = be32_to_cpup(p++);
306 ace->access_mask = be32_to_cpup(p++);
307 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 308 READ_BUF(dummy32);
309 len += XDR_QUADLEN(dummy32) << 2;
310 READMEM(buf, dummy32);
28e05dd8 311 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 312 status = nfs_ok;
28e05dd8 313 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 314 ;
28e05dd8 315 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 316 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 317 buf, dummy32, &ace->who_gid);
1da177e4 318 else
3c726023 319 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 320 buf, dummy32, &ace->who_uid);
3c726023
BF		 321 if (status)
322 return status;
1da177e4
LT		 323 }
324 } else
325 *acl = NULL;
326 if (bmval[1] & FATTR4_WORD1_MODE) {
327 READ_BUF(4);
328 len += 4;
06553991 329 iattr->ia_mode = be32_to_cpup(p++);
1da177e4
LT		 330 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
331 iattr->ia_valid |= ATTR_MODE;
332 }
333 if (bmval[1] & FATTR4_WORD1_OWNER) {
334 READ_BUF(4);
335 len += 4;
06553991 336 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 337 READ_BUF(dummy32);
338 len += (XDR_QUADLEN(dummy32) << 2);
339 READMEM(buf, dummy32);
47c85291
N		 340 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
341 return status;
1da177e4
LT		 342 iattr->ia_valid |= ATTR_UID;
343 }
344 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
345 READ_BUF(4);
346 len += 4;
06553991 347 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 348 READ_BUF(dummy32);
349 len += (XDR_QUADLEN(dummy32) << 2);
350 READMEM(buf, dummy32);
47c85291
N		 351 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
352 return status;
1da177e4
LT		 353 iattr->ia_valid |= ATTR_GID;
354 }
355 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
356 READ_BUF(4);
357 len += 4;
06553991 358 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 359 switch (dummy32) {
360 case NFS4_SET_TO_CLIENT_TIME:
361 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
362 all 32 bits of 'nseconds'. */
363 READ_BUF(12);
364 len += 12;
542d1ab3
BF		 365 p = xdr_decode_hyper(p, &sec);
366 iattr->ia_atime.tv_sec = (time_t)sec;
06553991 367 iattr->ia_atime.tv_nsec = be32_to_cpup(p++);
1da177e4
LT		 368 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
369 return nfserr_inval;
370 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
371 break;
372 case NFS4_SET_TO_SERVER_TIME:
373 iattr->ia_valid |= ATTR_ATIME;
374 break;
375 default:
376 goto xdr_error;
377 }
378 }
1da177e4
LT		 379 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
380 READ_BUF(4);
381 len += 4;
06553991 382 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 383 switch (dummy32) {
384 case NFS4_SET_TO_CLIENT_TIME:
385 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
386 all 32 bits of 'nseconds'. */
387 READ_BUF(12);
388 len += 12;
542d1ab3
BF		 389 p = xdr_decode_hyper(p, &sec);
390 iattr->ia_mtime.tv_sec = sec;
06553991 391 iattr->ia_mtime.tv_nsec = be32_to_cpup(p++);
1da177e4
LT		 392 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
393 return nfserr_inval;
394 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
395 break;
396 case NFS4_SET_TO_SERVER_TIME:
397 iattr->ia_valid |= ATTR_MTIME;
398 break;
399 default:
400 goto xdr_error;
401 }
402 }
18032ca0
DQ		 403
404 label->len = 0;
405#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
406 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
407 READ_BUF(4);
408 len += 4;
06553991 409 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
18032ca0
DQ		 410 READ_BUF(4);
411 len += 4;
06553991 412 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
18032ca0
DQ		 413 READ_BUF(4);
414 len += 4;
06553991 415 dummy32 = be32_to_cpup(p++);
18032ca0
DQ		 416 READ_BUF(dummy32);
417 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
418 return nfserr_badlabel;
419 len += (XDR_QUADLEN(dummy32) << 2);
420 READMEM(buf, dummy32);
29c353b3
BF		 421 label->len = dummy32;
422 label->data = svcxdr_dupstr(argp, buf, dummy32);
18032ca0
DQ		 423 if (!label->data)
424 return nfserr_jukebox;
18032ca0
DQ		 425 }
426#endif
427
3c8e0316
YZ		 428 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
429 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
430 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
431 READ_BUF(expected_len - len);
432 else if (len != expected_len)
1da177e4
LT		 433 goto xdr_error;
434
435 DECODE_TAIL;
1da177e4
LT		 436}
437
e31a1b66
BH		 438static __be32
439nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
440{
441 DECODE_HEAD;
442
443 READ_BUF(sizeof(stateid_t));
06553991 444 sid->si_generation = be32_to_cpup(p++);
e31a1b66
BH		 445 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
446
447 DECODE_TAIL;
448}
449
b37ad28b 450static __be32
1da177e4
LT		 451nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
452{
453 DECODE_HEAD;
454
455 READ_BUF(4);
06553991 456 access->ac_req_access = be32_to_cpup(p++);
1da177e4
LT		 457
458 DECODE_TAIL;
459}
460
acb2887e
BF		 461static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
462{
463 DECODE_HEAD;
12fc3e92 464 u32 dummy, uid, gid;
acb2887e
BF		 465 char *machine_name;
466 int i;
467 int nr_secflavs;
468
469 /* callback_sec_params4 */
470 READ_BUF(4);
06553991 471 nr_secflavs = be32_to_cpup(p++);
57569a70
BF		 472 if (nr_secflavs)
473 cbs->flavor = (u32)(-1);
474 else
475 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
476 cbs->flavor = 0;
acb2887e
BF		 477 for (i = 0; i < nr_secflavs; ++i) {
478 READ_BUF(4);
06553991 479 dummy = be32_to_cpup(p++);
acb2887e
BF		 480 switch (dummy) {
481 case RPC_AUTH_NULL:
482 /* Nothing to read */
12fc3e92
BF		 483 if (cbs->flavor == (u32)(-1))
484 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 485 break;
486 case RPC_AUTH_UNIX:
487 READ_BUF(8);
488 /* stamp */
06553991 489 dummy = be32_to_cpup(p++);
acb2887e
BF		 490
491 /* machine name */
06553991 492 dummy = be32_to_cpup(p++);
acb2887e
BF		 493 READ_BUF(dummy);
494 SAVEMEM(machine_name, dummy);
495
496 /* uid, gid */
497 READ_BUF(8);
06553991
BF		 498 uid = be32_to_cpup(p++);
499 gid = be32_to_cpup(p++);
acb2887e
BF		 500
501 /* more gids */
502 READ_BUF(4);
06553991 503 dummy = be32_to_cpup(p++);
acb2887e 504 READ_BUF(dummy * 4);
12fc3e92 505 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 506 kuid_t kuid = make_kuid(&init_user_ns, uid);
507 kgid_t kgid = make_kgid(&init_user_ns, gid);
508 if (uid_valid(kuid) && gid_valid(kgid)) {
509 cbs->uid = kuid;
510 cbs->gid = kgid;
511 cbs->flavor = RPC_AUTH_UNIX;
512 } else {
513 dprintk("RPC_AUTH_UNIX with invalid"
514 "uid or gid ignoring!\n");
515 }
12fc3e92 516 }
acb2887e
BF		 517 break;
518 case RPC_AUTH_GSS:
519 dprintk("RPC_AUTH_GSS callback secflavor "
520 "not supported!\n");
521 READ_BUF(8);
522 /* gcbp_service */
06553991 523 dummy = be32_to_cpup(p++);
acb2887e 524 /* gcbp_handle_from_server */
06553991 525 dummy = be32_to_cpup(p++);
acb2887e
BF		 526 READ_BUF(dummy);
527 p += XDR_QUADLEN(dummy);
528 /* gcbp_handle_from_client */
529 READ_BUF(4);
06553991 530 dummy = be32_to_cpup(p++);
acb2887e
BF		 531 READ_BUF(dummy);
532 break;
533 default:
534 dprintk("Illegal callback secflavor\n");
535 return nfserr_inval;
536 }
537 }
538 DECODE_TAIL;
539}
540
cb73a9f4
BF		 541static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
542{
543 DECODE_HEAD;
544
545 READ_BUF(4);
06553991 546 bc->bc_cb_program = be32_to_cpup(p++);
cb73a9f4
BF		 547 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
548
549 DECODE_TAIL;
550}
551
1d1bc8f2
BF		 552static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
553{
554 DECODE_HEAD;
1d1bc8f2
BF		 555
556 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
557 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991 558 bcts->dir = be32_to_cpup(p++);
6ce2357f
BS		 559 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
560 * could help us figure out we should be using it. */
1d1bc8f2
BF		 561 DECODE_TAIL;
562}
563
b37ad28b 564static __be32
1da177e4
LT		 565nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
566{
567 DECODE_HEAD;
568
e31a1b66 569 READ_BUF(4);
06553991 570 close->cl_seqid = be32_to_cpup(p++);
e31a1b66 571 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 572
573 DECODE_TAIL;
574}
575
576
b37ad28b 577static __be32
1da177e4
LT		 578nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
579{
580 DECODE_HEAD;
581
582 READ_BUF(12);
542d1ab3 583 p = xdr_decode_hyper(p, &commit->co_offset);
06553991 584 commit->co_count = be32_to_cpup(p++);
1da177e4
LT		 585
586 DECODE_TAIL;
587}
588
b37ad28b 589static __be32
1da177e4
LT		 590nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
591{
592 DECODE_HEAD;
593
594 READ_BUF(4);
06553991 595 create->cr_type = be32_to_cpup(p++);
1da177e4
LT		 596 switch (create->cr_type) {
597 case NF4LNK:
598 READ_BUF(4);
7fb84306
BF		 599 create->cr_datalen = be32_to_cpup(p++);
600 READ_BUF(create->cr_datalen);
29c353b3 601 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
7fb84306 602 if (!create->cr_data)
76f47128 603 return nfserr_jukebox;
1da177e4
LT		 604 break;
605 case NF4BLK:
606 case NF4CHR:
607 READ_BUF(8);
06553991
BF		 608 create->cr_specdata1 = be32_to_cpup(p++);
609 create->cr_specdata2 = be32_to_cpup(p++);
1da177e4
LT		 610 break;
611 case NF4SOCK:
612 case NF4FIFO:
613 case NF4DIR:
614 default:
615 break;
616 }
617
618 READ_BUF(4);
06553991 619 create->cr_namelen = be32_to_cpup(p++);
1da177e4
LT		 620 READ_BUF(create->cr_namelen);
621 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 622 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 623 return status;
624
3c8e0316 625 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
18032ca0 626 &create->cr_acl, &create->cr_label);
c0d6fc8a 627 if (status)
1da177e4
LT		 628 goto out;
629
630 DECODE_TAIL;
631}
632
b37ad28b 633static inline __be32
1da177e4
LT		 634nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
635{
e31a1b66 636 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 637}
638
b37ad28b 639static inline __be32
1da177e4
LT		 640nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
641{
642 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
643}
644
b37ad28b 645static __be32
1da177e4
LT		 646nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
647{
648 DECODE_HEAD;
649
650 READ_BUF(4);
06553991 651 link->li_namelen = be32_to_cpup(p++);
1da177e4
LT		 652 READ_BUF(link->li_namelen);
653 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 654 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 655 return status;
656
657 DECODE_TAIL;
658}
659
b37ad28b 660static __be32
1da177e4
LT		 661nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
662{
663 DECODE_HEAD;
664
1da177e4
LT		 665 /*
666 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
667 */
668 READ_BUF(28);
06553991 669 lock->lk_type = be32_to_cpup(p++);
1da177e4
LT		 670 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
671 goto xdr_error;
06553991 672 lock->lk_reclaim = be32_to_cpup(p++);
542d1ab3
BF		 673 p = xdr_decode_hyper(p, &lock->lk_offset);
674 p = xdr_decode_hyper(p, &lock->lk_length);
06553991 675 lock->lk_is_new = be32_to_cpup(p++);
1da177e4
LT		 676
677 if (lock->lk_is_new) {
e31a1b66 678 READ_BUF(4);
06553991 679 lock->lk_new_open_seqid = be32_to_cpup(p++);
e31a1b66
BH		 680 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
681 if (status)
682 return status;
683 READ_BUF(8 + sizeof(clientid_t));
06553991 684 lock->lk_new_lock_seqid = be32_to_cpup(p++);
1da177e4 685 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
06553991 686 lock->lk_new_owner.len = be32_to_cpup(p++);
1da177e4
LT		 687 READ_BUF(lock->lk_new_owner.len);
688 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
689 } else {
e31a1b66
BH		 690 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
691 if (status)
692 return status;
693 READ_BUF(4);
06553991 694 lock->lk_old_lock_seqid = be32_to_cpup(p++);
1da177e4
LT		 695 }
696
697 DECODE_TAIL;
698}
699
b37ad28b 700static __be32
1da177e4
LT		 701nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
702{
703 DECODE_HEAD;
704
705 READ_BUF(32);
06553991 706 lockt->lt_type = be32_to_cpup(p++);
1da177e4
LT		 707 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
708 goto xdr_error;
542d1ab3
BF		 709 p = xdr_decode_hyper(p, &lockt->lt_offset);
710 p = xdr_decode_hyper(p, &lockt->lt_length);
1da177e4 711 COPYMEM(&lockt->lt_clientid, 8);
06553991 712 lockt->lt_owner.len = be32_to_cpup(p++);
1da177e4
LT		 713 READ_BUF(lockt->lt_owner.len);
714 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
715
716 DECODE_TAIL;
717}
718
b37ad28b 719static __be32
1da177e4
LT		 720nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
721{
722 DECODE_HEAD;
723
e31a1b66 724 READ_BUF(8);
06553991 725 locku->lu_type = be32_to_cpup(p++);
1da177e4
LT		 726 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
727 goto xdr_error;
06553991 728 locku->lu_seqid = be32_to_cpup(p++);
e31a1b66
BH		 729 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
730 if (status)
731 return status;
732 READ_BUF(16);
542d1ab3
BF		 733 p = xdr_decode_hyper(p, &locku->lu_offset);
734 p = xdr_decode_hyper(p, &locku->lu_length);
1da177e4
LT		 735
736 DECODE_TAIL;
737}
738
b37ad28b 739static __be32
1da177e4
LT		 740nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
741{
742 DECODE_HEAD;
743
744 READ_BUF(4);
06553991 745 lookup->lo_len = be32_to_cpup(p++);
1da177e4
LT		 746 READ_BUF(lookup->lo_len);
747 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 748 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 749 return status;
750
751 DECODE_TAIL;
752}
753
2c8bd7e0 754static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 755{
756 __be32 *p;
757 u32 w;
758
759 READ_BUF(4);
06553991 760 w = be32_to_cpup(p++);
2c8bd7e0
BH		 761 *share_access = w & NFS4_SHARE_ACCESS_MASK;
762 *deleg_want = w & NFS4_SHARE_WANT_MASK;
763 if (deleg_when)
764 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
765
04f9e664
BF		 766 switch (w & NFS4_SHARE_ACCESS_MASK) {
767 case NFS4_SHARE_ACCESS_READ:
768 case NFS4_SHARE_ACCESS_WRITE:
769 case NFS4_SHARE_ACCESS_BOTH:
770 break;
771 default:
772 return nfserr_bad_xdr;
773 }
fc0d14fe 774 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 775 if (!w)
776 return nfs_ok;
777 if (!argp->minorversion)
778 return nfserr_bad_xdr;
779 switch (w & NFS4_SHARE_WANT_MASK) {
780 case NFS4_SHARE_WANT_NO_PREFERENCE:
781 case NFS4_SHARE_WANT_READ_DELEG:
782 case NFS4_SHARE_WANT_WRITE_DELEG:
783 case NFS4_SHARE_WANT_ANY_DELEG:
784 case NFS4_SHARE_WANT_NO_DELEG:
785 case NFS4_SHARE_WANT_CANCEL:
786 break;
787 default:
788 return nfserr_bad_xdr;
789 }
92bac8c5 790 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 791 if (!w)
792 return nfs_ok;
2c8bd7e0
BH		 793
794 if (!deleg_when) /* open_downgrade */
795 return nfserr_inval;
04f9e664
BF		 796 switch (w) {
797 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
798 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 799 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
800 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 801 return nfs_ok;
802 }
803xdr_error:
804 return nfserr_bad_xdr;
805}
806
807static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
808{
809 __be32 *p;
810
811 READ_BUF(4);
06553991 812 *x = be32_to_cpup(p++);
04f9e664 813 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 814 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 815 return nfserr_bad_xdr;
816 return nfs_ok;
817xdr_error:
818 return nfserr_bad_xdr;
819}
820
a084daf5
BF		 821static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
822{
823 __be32 *p;
824
825 READ_BUF(4);
06553991 826 o->len = be32_to_cpup(p++);
a084daf5
BF		 827
828 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
829 return nfserr_bad_xdr;
830
831 READ_BUF(o->len);
832 SAVEMEM(o->data, o->len);
833 return nfs_ok;
834xdr_error:
835 return nfserr_bad_xdr;
836}
837
b37ad28b 838static __be32
1da177e4
LT		 839nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
840{
841 DECODE_HEAD;
2c8bd7e0 842 u32 dummy;
1da177e4
LT		 843
844 memset(open->op_bmval, 0, sizeof(open->op_bmval));
845 open->op_iattr.ia_valid = 0;
fe0750e5 846 open->op_openowner = NULL;
1da177e4 847
9d313b17 848 open->op_xdr_error = 0;
1da177e4 849 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 850 READ_BUF(4);
06553991 851 open->op_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 852 /* decode, yet ignore deleg_when until supported */
853 status = nfsd4_decode_share_access(argp, &open->op_share_access,
854 &open->op_deleg_want, &dummy);
04f9e664
BF		 855 if (status)
856 goto xdr_error;
857 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
858 if (status)
859 goto xdr_error;
a084daf5 860 READ_BUF(sizeof(clientid_t));
1da177e4 861 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 862 status = nfsd4_decode_opaque(argp, &open->op_owner);
863 if (status)
864 goto xdr_error;
865 READ_BUF(4);
06553991 866 open->op_create = be32_to_cpup(p++);
1da177e4
LT		 867 switch (open->op_create) {
868 case NFS4_OPEN_NOCREATE:
869 break;
870 case NFS4_OPEN_CREATE:
871 READ_BUF(4);
06553991 872 open->op_createmode = be32_to_cpup(p++);
1da177e4
LT		 873 switch (open->op_createmode) {
874 case NFS4_CREATE_UNCHECKED:
875 case NFS4_CREATE_GUARDED:
c0d6fc8a 876 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 877 &open->op_iattr, &open->op_acl, &open->op_label);
c0d6fc8a 878 if (status)
1da177e4
LT		 879 goto out;
880 break;
881 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 882 READ_BUF(NFS4_VERIFIER_SIZE);
883 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 884 break;
79fb54ab
BH		 885 case NFS4_CREATE_EXCLUSIVE4_1:
886 if (argp->minorversion < 1)
887 goto xdr_error;
ab4684d1
CL		 888 READ_BUF(NFS4_VERIFIER_SIZE);
889 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 890 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 891 &open->op_iattr, &open->op_acl, &open->op_label);
79fb54ab
BH		 892 if (status)
893 goto out;
894 break;
1da177e4
LT		 895 default:
896 goto xdr_error;
897 }
898 break;
899 default:
900 goto xdr_error;
901 }
902
903 /* open_claim */
904 READ_BUF(4);
06553991 905 open->op_claim_type = be32_to_cpup(p++);
1da177e4
LT		 906 switch (open->op_claim_type) {
907 case NFS4_OPEN_CLAIM_NULL:
908 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
909 READ_BUF(4);
06553991 910 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 911 READ_BUF(open->op_fname.len);
912 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 913 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 914 return status;
915 break;
916 case NFS4_OPEN_CLAIM_PREVIOUS:
917 READ_BUF(4);
06553991 918 open->op_delegate_type = be32_to_cpup(p++);
1da177e4
LT		 919 break;
920 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 921 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
922 if (status)
923 return status;
924 READ_BUF(4);
06553991 925 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 926 READ_BUF(open->op_fname.len);
927 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 928 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 929 return status;
930 break;
8b289b2c
BF		 931 case NFS4_OPEN_CLAIM_FH:
932 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
933 if (argp->minorversion < 1)
934 goto xdr_error;
935 /* void */
936 break;
937 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
938 if (argp->minorversion < 1)
939 goto xdr_error;
940 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
941 if (status)
942 return status;
943 break;
1da177e4
LT		 944 default:
945 goto xdr_error;
946 }
947
948 DECODE_TAIL;
949}
950
b37ad28b 951static __be32
1da177e4
LT		 952nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
953{
954 DECODE_HEAD;
e1a90ebd
AS		 955
956 if (argp->minorversion >= 1)
957 return nfserr_notsupp;
958
e31a1b66
BH		 959 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
960 if (status)
961 return status;
962 READ_BUF(4);
06553991 963 open_conf->oc_seqid = be32_to_cpup(p++);
e1a90ebd 964
1da177e4
LT		 965 DECODE_TAIL;
966}
967
b37ad28b 968static __be32
1da177e4
LT		 969nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
970{
971 DECODE_HEAD;
972
e31a1b66
BH		 973 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
974 if (status)
975 return status;
04f9e664 976 READ_BUF(4);
06553991 977 open_down->od_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 978 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
979 &open_down->od_deleg_want, NULL);
04f9e664
BF		 980 if (status)
981 return status;
982 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
983 if (status)
984 return status;
1da177e4
LT		 985 DECODE_TAIL;
986}
987
b37ad28b 988static __be32
1da177e4
LT		 989nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
990{
991 DECODE_HEAD;
992
993 READ_BUF(4);
06553991 994 putfh->pf_fhlen = be32_to_cpup(p++);
1da177e4
LT		 995 if (putfh->pf_fhlen > NFS4_FHSIZE)
996 goto xdr_error;
997 READ_BUF(putfh->pf_fhlen);
998 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
999
1000 DECODE_TAIL;
1001}
1002
e1a90ebd
AS		 1003static __be32
1004nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1005{
1006 if (argp->minorversion == 0)
1007 return nfs_ok;
1008 return nfserr_notsupp;
1009}
1010
b37ad28b 1011static __be32
1da177e4
LT		 1012nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1013{
1014 DECODE_HEAD;
1015
e31a1b66
BH		 1016 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1017 if (status)
1018 return status;
1019 READ_BUF(12);
542d1ab3 1020 p = xdr_decode_hyper(p, &read->rd_offset);
06553991 1021 read->rd_length = be32_to_cpup(p++);
1da177e4
LT		 1022
1023 DECODE_TAIL;
1024}
1025
b37ad28b 1026static __be32
1da177e4
LT		 1027nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1028{
1029 DECODE_HEAD;
1030
1031 READ_BUF(24);
542d1ab3 1032 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1da177e4 1033 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
06553991
BF		 1034 readdir->rd_dircount = be32_to_cpup(p++);
1035 readdir->rd_maxcount = be32_to_cpup(p++);
1da177e4
LT		 1036 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1037 goto out;
1038
1039 DECODE_TAIL;
1040}
1041
b37ad28b 1042static __be32
1da177e4
LT		 1043nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1044{
1045 DECODE_HEAD;
1046
1047 READ_BUF(4);
06553991 1048 remove->rm_namelen = be32_to_cpup(p++);
1da177e4
LT		 1049 READ_BUF(remove->rm_namelen);
1050 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1051 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1052 return status;
1053
1054 DECODE_TAIL;
1055}
1056
b37ad28b 1057static __be32
1da177e4
LT		 1058nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1059{
1060 DECODE_HEAD;
1061
1062 READ_BUF(4);
06553991 1063 rename->rn_snamelen = be32_to_cpup(p++);
1da177e4
LT		 1064 READ_BUF(rename->rn_snamelen + 4);
1065 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
06553991 1066 rename->rn_tnamelen = be32_to_cpup(p++);
1da177e4
LT		 1067 READ_BUF(rename->rn_tnamelen);
1068 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1069 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1070 return status;
a36b1725 1071 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1072 return status;
1073
1074 DECODE_TAIL;
1075}
1076
b37ad28b 1077static __be32
1da177e4
LT		 1078nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1079{
1080 DECODE_HEAD;
1081
e1a90ebd
AS		 1082 if (argp->minorversion >= 1)
1083 return nfserr_notsupp;
1084
1da177e4
LT		 1085 READ_BUF(sizeof(clientid_t));
1086 COPYMEM(clientid, sizeof(clientid_t));
1087
1088 DECODE_TAIL;
1089}
1090
dcb488a3
AA		 1091static __be32
1092nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1093 struct nfsd4_secinfo *secinfo)
1094{
1095 DECODE_HEAD;
1096
1097 READ_BUF(4);
06553991 1098 secinfo->si_namelen = be32_to_cpup(p++);
dcb488a3
AA		 1099 READ_BUF(secinfo->si_namelen);
1100 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1101 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1102 if (status)
1103 return status;
1104 DECODE_TAIL;
1105}
1106
04f4ad16
BF		 1107static __be32
1108nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1109 struct nfsd4_secinfo_no_name *sin)
1110{
1111 DECODE_HEAD;
1112
1113 READ_BUF(4);
06553991 1114 sin->sin_style = be32_to_cpup(p++);
04f4ad16
BF		 1115 DECODE_TAIL;
1116}
1117
b37ad28b 1118static __be32
1da177e4
LT		 1119nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1120{
e31a1b66 1121 __be32 status;
1da177e4 1122
e31a1b66
BH		 1123 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1124 if (status)
1125 return status;
3c8e0316 1126 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
18032ca0 1127 &setattr->sa_acl, &setattr->sa_label);
1da177e4
LT		 1128}
1129
b37ad28b 1130static __be32
1da177e4
LT		 1131nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1132{
1133 DECODE_HEAD;
1134
e1a90ebd
AS		 1135 if (argp->minorversion >= 1)
1136 return nfserr_notsupp;
1137
ab4684d1
CL		 1138 READ_BUF(NFS4_VERIFIER_SIZE);
1139 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1140
a084daf5
BF		 1141 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1142 if (status)
1143 return nfserr_bad_xdr;
1144 READ_BUF(8);
06553991
BF		 1145 setclientid->se_callback_prog = be32_to_cpup(p++);
1146 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1da177e4
LT		 1147
1148 READ_BUF(setclientid->se_callback_netid_len + 4);
1149 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
06553991 1150 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1da177e4
LT		 1151
1152 READ_BUF(setclientid->se_callback_addr_len + 4);
1153 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
06553991 1154 setclientid->se_callback_ident = be32_to_cpup(p++);
1da177e4
LT		 1155
1156 DECODE_TAIL;
1157}
1158
b37ad28b 1159static __be32
1da177e4
LT		 1160nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1161{
1162 DECODE_HEAD;
1163
e1a90ebd
AS		 1164 if (argp->minorversion >= 1)
1165 return nfserr_notsupp;
1166
ab4684d1 1167 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1168 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1169 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1170
1171 DECODE_TAIL;
1172}
1173
1174/* Also used for NVERIFY */
b37ad28b 1175static __be32
1da177e4
LT		 1176nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1177{
1da177e4
LT		 1178 DECODE_HEAD;
1179
1180 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1181 goto out;
1182
1183 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1184 * nfsd4_proc_verify */
1185
1da177e4 1186 READ_BUF(4);
06553991 1187 verify->ve_attrlen = be32_to_cpup(p++);
1da177e4
LT		 1188 READ_BUF(verify->ve_attrlen);
1189 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1190
1191 DECODE_TAIL;
1192}
1193
b37ad28b 1194static __be32
1da177e4
LT		 1195nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1196{
1197 int avail;
1da177e4
LT		 1198 int len;
1199 DECODE_HEAD;
1200
e31a1b66
BH		 1201 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1202 if (status)
1203 return status;
1204 READ_BUF(16);
542d1ab3 1205 p = xdr_decode_hyper(p, &write->wr_offset);
06553991 1206 write->wr_stable_how = be32_to_cpup(p++);
1da177e4
LT		 1207 if (write->wr_stable_how > 2)
1208 goto xdr_error;
06553991 1209 write->wr_buflen = be32_to_cpup(p++);
1da177e4
LT		 1210
1211 /* Sorry .. no magic macros for this.. *
1212 * READ_BUF(write->wr_buflen);
1213 * SAVEMEM(write->wr_buf, write->wr_buflen);
1214 */
1215 avail = (char*)argp->end - (char*)argp->p;
1216 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1217 dprintk("NFSD: xdr error (%s:%d)\n",
1218 __FILE__, __LINE__);
1da177e4
LT		 1219 goto xdr_error;
1220 }
70cc7f75
BF		 1221 write->wr_head.iov_base = p;
1222 write->wr_head.iov_len = avail;
70cc7f75 1223 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1224
1225 len = XDR_QUADLEN(write->wr_buflen) << 2;
1226 if (len >= avail) {
1227 int pages;
1228
1229 len -= avail;
1230
1231 pages = len >> PAGE_SHIFT;
1232 argp->pagelist += pages;
1233 argp->pagelen -= pages * PAGE_SIZE;
1234 len -= pages * PAGE_SIZE;
1235
1236 argp->p = (__be32 *)page_address(argp->pagelist[0]);
365da4ad 1237 argp->pagelist++;
5a80a54d 1238 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1239 }
5a80a54d 1240 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1241
1242 DECODE_TAIL;
1243}
1244
b37ad28b 1245static __be32
1da177e4
LT		 1246nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1247{
1248 DECODE_HEAD;
1249
e1a90ebd
AS		 1250 if (argp->minorversion >= 1)
1251 return nfserr_notsupp;
1252
1da177e4
LT		 1253 READ_BUF(12);
1254 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
06553991 1255 rlockowner->rl_owner.len = be32_to_cpup(p++);
1da177e4
LT		 1256 READ_BUF(rlockowner->rl_owner.len);
1257 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1258
60adfc50
AA		 1259 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1260 return nfserr_inval;
1da177e4
LT		 1261 DECODE_TAIL;
1262}
1263
2db134eb
AA		 1264static __be32
1265nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1266 struct nfsd4_exchange_id *exid)
2db134eb 1267{
5afa040b 1268 int dummy, tmp;
0733d213
AA		 1269 DECODE_HEAD;
1270
1271 READ_BUF(NFS4_VERIFIER_SIZE);
1272 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1273
a084daf5
BF		 1274 status = nfsd4_decode_opaque(argp, &exid->clname);
1275 if (status)
1276 return nfserr_bad_xdr;
0733d213
AA		 1277
1278 READ_BUF(4);
06553991 1279 exid->flags = be32_to_cpup(p++);
0733d213
AA		 1280
1281 /* Ignore state_protect4_a */
1282 READ_BUF(4);
06553991 1283 exid->spa_how = be32_to_cpup(p++);
0733d213
AA		 1284 switch (exid->spa_how) {
1285 case SP4_NONE:
1286 break;
1287 case SP4_MACH_CRED:
1288 /* spo_must_enforce */
1289 READ_BUF(4);
06553991 1290 dummy = be32_to_cpup(p++);
0733d213
AA		 1291 READ_BUF(dummy * 4);
1292 p += dummy;
1293
1294 /* spo_must_allow */
1295 READ_BUF(4);
06553991 1296 dummy = be32_to_cpup(p++);
0733d213
AA		 1297 READ_BUF(dummy * 4);
1298 p += dummy;
1299 break;
1300 case SP4_SSV:
1301 /* ssp_ops */
1302 READ_BUF(4);
06553991 1303 dummy = be32_to_cpup(p++);
0733d213
AA		 1304 READ_BUF(dummy * 4);
1305 p += dummy;
1306
1307 READ_BUF(4);
06553991 1308 dummy = be32_to_cpup(p++);
0733d213
AA		 1309 READ_BUF(dummy * 4);
1310 p += dummy;
1311
1312 /* ssp_hash_algs<> */
1313 READ_BUF(4);
06553991 1314 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1315 while (tmp--) {
1316 READ_BUF(4);
06553991 1317 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1318 READ_BUF(dummy);
1319 p += XDR_QUADLEN(dummy);
1320 }
0733d213
AA		 1321
1322 /* ssp_encr_algs<> */
1323 READ_BUF(4);
06553991 1324 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1325 while (tmp--) {
1326 READ_BUF(4);
06553991 1327 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1328 READ_BUF(dummy);
1329 p += XDR_QUADLEN(dummy);
1330 }
0733d213
AA		 1331
1332 /* ssp_window and ssp_num_gss_handles */
1333 READ_BUF(8);
06553991
BF		 1334 dummy = be32_to_cpup(p++);
1335 dummy = be32_to_cpup(p++);
0733d213
AA		 1336 break;
1337 default:
1338 goto xdr_error;
1339 }
1340
1341 /* Ignore Implementation ID */
1342 READ_BUF(4); /* nfs_impl_id4 array length */
06553991 1343 dummy = be32_to_cpup(p++);
0733d213
AA		 1344
1345 if (dummy > 1)
1346 goto xdr_error;
1347
1348 if (dummy == 1) {
1349 /* nii_domain */
1350 READ_BUF(4);
06553991 1351 dummy = be32_to_cpup(p++);
0733d213
AA		 1352 READ_BUF(dummy);
1353 p += XDR_QUADLEN(dummy);
1354
1355 /* nii_name */
1356 READ_BUF(4);
06553991 1357 dummy = be32_to_cpup(p++);
0733d213
AA		 1358 READ_BUF(dummy);
1359 p += XDR_QUADLEN(dummy);
1360
1361 /* nii_date */
1362 READ_BUF(12);
1363 p += 3;
1364 }
1365 DECODE_TAIL;
2db134eb
AA		 1366}
1367
1368static __be32
1369nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1370 struct nfsd4_create_session *sess)
1371{
ec6b5d7b 1372 DECODE_HEAD;
ec6b5d7b 1373 u32 dummy;
ec6b5d7b
AA		 1374
1375 READ_BUF(16);
1376 COPYMEM(&sess->clientid, 8);
06553991
BF		 1377 sess->seqid = be32_to_cpup(p++);
1378 sess->flags = be32_to_cpup(p++);
ec6b5d7b
AA		 1379
1380 /* Fore channel attrs */
1381 READ_BUF(28);
06553991
BF		 1382 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1383 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1384 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1385 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1386 sess->fore_channel.maxops = be32_to_cpup(p++);
1387 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1388 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1389 if (sess->fore_channel.nr_rdma_attrs == 1) {
1390 READ_BUF(4);
06553991 1391 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1392 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1393 dprintk("Too many fore channel attr bitmaps!\n");
1394 goto xdr_error;
1395 }
1396
1397 /* Back channel attrs */
1398 READ_BUF(28);
06553991
BF		 1399 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1400 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1401 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1402 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1403 sess->back_channel.maxops = be32_to_cpup(p++);
1404 sess->back_channel.maxreqs = be32_to_cpup(p++);
1405 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1406 if (sess->back_channel.nr_rdma_attrs == 1) {
1407 READ_BUF(4);
06553991 1408 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1409 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1410 dprintk("Too many back channel attr bitmaps!\n");
1411 goto xdr_error;
1412 }
1413
acb2887e 1414 READ_BUF(4);
06553991 1415 sess->callback_prog = be32_to_cpup(p++);
acb2887e 1416 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1417 DECODE_TAIL;
2db134eb
AA		 1418}
1419
1420static __be32
1421nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1422 struct nfsd4_destroy_session *destroy_session)
1423{
e10e0cfc
BH		 1424 DECODE_HEAD;
1425 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1426 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1427
1428 DECODE_TAIL;
2db134eb
AA		 1429}
1430
e1ca12df
BS		 1431static __be32
1432nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1433 struct nfsd4_free_stateid *free_stateid)
1434{
1435 DECODE_HEAD;
1436
1437 READ_BUF(sizeof(stateid_t));
06553991 1438 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
e1ca12df
BS		 1439 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1440
1441 DECODE_TAIL;
1442}
1443
2db134eb
AA		 1444static __be32
1445nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1446 struct nfsd4_sequence *seq)
1447{
b85d4c01
BH		 1448 DECODE_HEAD;
1449
1450 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1451 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991
BF		 1452 seq->seqid = be32_to_cpup(p++);
1453 seq->slotid = be32_to_cpup(p++);
1454 seq->maxslots = be32_to_cpup(p++);
1455 seq->cachethis = be32_to_cpup(p++);
b85d4c01
BH		 1456
1457 DECODE_TAIL;
2db134eb
AA		 1458}
1459
17456804
BS		 1460static __be32
1461nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1462{
17456804 1463 int i;
03cfb420
BS		 1464 __be32 *p, status;
1465 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1466
1467 READ_BUF(4);
1468 test_stateid->ts_num_ids = ntohl(*p++);
1469
03cfb420 1470 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1471
1472 for (i = 0; i < test_stateid->ts_num_ids; i++) {
d5e23383 1473 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
03cfb420 1474 if (!stateid) {
afcf6792 1475 status = nfserrno(-ENOMEM);
03cfb420
BS		 1476 goto out;
1477 }
1478
03cfb420
BS		 1479 INIT_LIST_HEAD(&stateid->ts_id_list);
1480 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1481
1482 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1483 if (status)
03cfb420 1484 goto out;
17456804
BS		 1485 }
1486
1487 status = 0;
1488out:
1489 return status;
1490xdr_error:
1491 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1492 status = nfserr_bad_xdr;
1493 goto out;
1494}
1495
345c2842
MJ		 1496static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1497{
1498 DECODE_HEAD;
1499
1500 READ_BUF(8);
1501 COPYMEM(&dc->clientid, 8);
1502
1503 DECODE_TAIL;
1504}
1505
4dc6ec00
BF		 1506static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1507{
1508 DECODE_HEAD;
1509
1510 READ_BUF(4);
06553991 1511 rc->rca_one_fs = be32_to_cpup(p++);
4dc6ec00
BF		 1512
1513 DECODE_TAIL;
1514}
1515
95d871f0
AS		 1516static __be32
1517nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1518 struct nfsd4_fallocate *fallocate)
1519{
1520 DECODE_HEAD;
1521
1522 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1523 if (status)
1524 return status;
1525
1526 READ_BUF(16);
1527 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1528 xdr_decode_hyper(p, &fallocate->falloc_length);
1529
1530 DECODE_TAIL;
1531}
1532
24bab491
AS		 1533static __be32
1534nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1535{
1536 DECODE_HEAD;
1537
1538 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1539 if (status)
1540 return status;
1541
1542 READ_BUF(8 + 4);
1543 p = xdr_decode_hyper(p, &seek->seek_offset);
1544 seek->seek_whence = be32_to_cpup(p);
1545
1546 DECODE_TAIL;
1547}
1548
347e0ad9
BH		 1549static __be32
1550nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1551{
1552 return nfs_ok;
1553}
1554
3c375c6f
BH		 1555static __be32
1556nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1557{
1e685ec2 1558 return nfserr_notsupp;
3c375c6f
BH		 1559}
1560
347e0ad9
BH		 1561typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1562
1563static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1564 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1565 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1566 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1567 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1568 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1569 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1570 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1571 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1572 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1573 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1574 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1575 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1576 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1577 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1578 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1579 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1580 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1581 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1582 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1583 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1584 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1585 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1586 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1587 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1588 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1589 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1590 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1591 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1592 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1593 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1594 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1595 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1596 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1597 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1598 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1599 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1600 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1601
1602 /* new operations for NFSv4.1 */
cb73a9f4 1603 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1604 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1605 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1606 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1607 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1608 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1609 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1610 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1611 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1612 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1613 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1614 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1615 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1616 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1617 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1618 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1619 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1620 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1621 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
87a15a80
AS		 1622
1623 /* new operations for NFSv4.2 */
95d871f0 1624 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
87a15a80
AS		 1625 [OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp,
1626 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
b0cb9085 1627 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
87a15a80
AS		 1628 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1629 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1630 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1631 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1632 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1633 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
24bab491 1634 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
87a15a80 1635 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
2db134eb
AA		 1636};
1637
e1a90ebd
AS		 1638static inline bool
1639nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1640{
8217d146 1641 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1642 return false;
8217d146 1643 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1644 return false;
8217d146
AS		 1645 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1646 return false;
1647 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1648 return false;
1649 return true;
1650}
f2feb96b 1651
b37ad28b 1652static __be32
1da177e4
LT		 1653nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1654{
1655 DECODE_HEAD;
1656 struct nfsd4_op *op;
1091006c 1657 bool cachethis = false;
a5cddc88
BF		 1658 int auth_slack= argp->rqstp->rq_auth_slack;
1659 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 1660 int readcount = 0;
1661 int readbytes = 0;
1da177e4
LT		 1662 int i;
1663
1da177e4 1664 READ_BUF(4);
06553991 1665 argp->taglen = be32_to_cpup(p++);
1da177e4
LT		 1666 READ_BUF(argp->taglen + 8);
1667 SAVEMEM(argp->tag, argp->taglen);
06553991
BF		 1668 argp->minorversion = be32_to_cpup(p++);
1669 argp->opcnt = be32_to_cpup(p++);
4f0cefbf 1670 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 1671
1672 if (argp->taglen > NFSD4_MAX_TAGLEN)
1673 goto xdr_error;
1674 if (argp->opcnt > 100)
1675 goto xdr_error;
1676
e8c96f8c 1677 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
5d6031ca 1678 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1da177e4
LT		 1679 if (!argp->ops) {
1680 argp->ops = argp->iops;
817cb9d4 1681 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1682 goto xdr_error;
1683 }
1684 }
1685
e1a90ebd 1686 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1687 argp->opcnt = 0;
1688
1da177e4
LT		 1689 for (i = 0; i < argp->opcnt; i++) {
1690 op = &argp->ops[i];
1691 op->replay = NULL;
1692
8a61b18c 1693 READ_BUF(4);
06553991 1694 op->opnum = be32_to_cpup(p++);
1da177e4 1695
e1a90ebd
AS		 1696 if (nfsd4_opnum_in_range(argp, op))
1697 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1698 else {
1da177e4
LT		 1699 op->opnum = OP_ILLEGAL;
1700 op->status = nfserr_op_illegal;
1da177e4 1701 }
1091006c
BF		 1702 /*
1703 * We'll try to cache the result in the DRC if any one
1704 * op in the compound wants to be cached:
1705 */
1706 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 1707
b0e35fda
BF		 1708 if (op->opnum == OP_READ) {
1709 readcount++;
1710 readbytes += nfsd4_max_reply(argp->rqstp, op);
1711 } else
1712 max_reply += nfsd4_max_reply(argp->rqstp, op);
f7b43d0c
BF		 1713 /*
1714 * OP_LOCK may return a conflicting lock. (Special case
1715 * because it will just skip encoding this if it runs
1716 * out of xdr buffer space, and it is the only operation
1717 * that behaves this way.)
1718 */
1719 if (op->opnum == OP_LOCK)
1720 max_reply += NFS4_OPAQUE_LIMIT;
e372ba60
BF		 1721
1722 if (op->status) {
1723 argp->opcnt = i+1;
1724 break;
1725 }
1da177e4 1726 }
1091006c
BF		 1727 /* Sessions make the DRC unnecessary: */
1728 if (argp->minorversion)
1729 cachethis = false;
b0e35fda 1730 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 1731 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 1732
a5cddc88 1733 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
779fb0f3 1734 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
b0e35fda 1735
1da177e4
LT		 1736 DECODE_TAIL;
1737}
1da177e4 1738
d05d5744 1739static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
c654b8a9
BF		 1740{
1741 if (IS_I_VERSION(inode)) {
d05d5744 1742 p = xdr_encode_hyper(p, inode->i_version);
c654b8a9 1743 } else {
d05d5744
BF		 1744 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1745 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
c654b8a9 1746 }
d05d5744 1747 return p;
c654b8a9
BF		 1748}
1749
d05d5744 1750static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 1751{
d05d5744 1752 *p++ = cpu_to_be32(c->atomic);
c654b8a9 1753 if (c->change_supported) {
d05d5744
BF		 1754 p = xdr_encode_hyper(p, c->before_change);
1755 p = xdr_encode_hyper(p, c->after_change);
c654b8a9 1756 } else {
d05d5744
BF		 1757 *p++ = cpu_to_be32(c->before_ctime_sec);
1758 *p++ = cpu_to_be32(c->before_ctime_nsec);
1759 *p++ = cpu_to_be32(c->after_ctime_sec);
1760 *p++ = cpu_to_be32(c->after_ctime_nsec);
c654b8a9 1761 }
d05d5744 1762 return p;
c654b8a9 1763}
1da177e4 1764
81c3f413 1765/* Encode as an array of strings the string given with components
e7a0444a 1766 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1767 */
ddd1ea56
BF		 1768static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1769 char *components, char esc_enter,
1770 char esc_exit)
81c3f413 1771{
ddd1ea56 1772 __be32 *p;
082d4bd7
BF		 1773 __be32 pathlen;
1774 int pathlen_offset;
81c3f413 1775 int strlen, count=0;
e7a0444a 1776 char *str, *end, *next;
81c3f413
BF		 1777
1778 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 1779
1780 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 1781 p = xdr_reserve_space(xdr, 4);
1782 if (!p)
81c3f413 1783 return nfserr_resource;
082d4bd7
BF		 1784 p++; /* We will fill this in with @count later */
1785
81c3f413
BF		 1786 end = str = components;
1787 while (*end) {
e7a0444a
WAA		 1788 bool found_esc = false;
1789
1790 /* try to parse as esc_start, ..., esc_end, sep */
1791 if (*str == esc_enter) {
1792 for (; *end && (*end != esc_exit); end++)
1793 /* find esc_exit or end of string */;
1794 next = end + 1;
1795 if (*end && (!*next || *next == sep)) {
1796 str++;
1797 found_esc = true;
1798 }
1799 }
1800
1801 if (!found_esc)
1802 for (; *end && (*end != sep); end++)
1803 /* find sep or end of string */;
1804
81c3f413
BF		 1805 strlen = end - str;
1806 if (strlen) {
ddd1ea56
BF		 1807 p = xdr_reserve_space(xdr, strlen + 4);
1808 if (!p)
81c3f413 1809 return nfserr_resource;
0c0c267b 1810 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 1811 count++;
1812 }
1813 else
1814 end++;
5a64e569
BC		 1815 if (found_esc)
1816 end = next;
1817
81c3f413
BF		 1818 str = end;
1819 }
082d4bd7
BF		 1820 pathlen = htonl(xdr->buf->len - pathlen_offset);
1821 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 1822 return 0;
1823}
1824
e7a0444a
WAA		 1825/* Encode as an array of strings the string given with components
1826 * separated @sep.
1827 */
ddd1ea56
BF		 1828static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1829 char *components)
e7a0444a 1830{
ddd1ea56 1831 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 1832}
1833
81c3f413
BF		 1834/*
1835 * encode a location element of a fs_locations structure
1836 */
ddd1ea56
BF		 1837static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1838 struct nfsd4_fs_location *location)
81c3f413 1839{
b37ad28b 1840 __be32 status;
81c3f413 1841
ddd1ea56 1842 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 1843 '[', ']');
81c3f413
BF		 1844 if (status)
1845 return status;
ddd1ea56 1846 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 1847 if (status)
1848 return status;
81c3f413
BF		 1849 return 0;
1850}
1851
1852/*
ed748aac 1853 * Encode a path in RFC3530 'pathname4' format
81c3f413 1854 */
ddd1ea56
BF		 1855static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1856 const struct path *root,
1857 const struct path *path)
81c3f413 1858{
301f0268 1859 struct path cur = *path;
ddd1ea56 1860 __be32 *p;
ed748aac
TM		 1861 struct dentry **components = NULL;
1862 unsigned int ncomponents = 0;
1863 __be32 err = nfserr_jukebox;
81c3f413 1864
ed748aac 1865 dprintk("nfsd4_encode_components(");
81c3f413 1866
ed748aac
TM		 1867 path_get(&cur);
1868 /* First walk the path up to the nfsd root, and store the
1869 * dentries/path components in an array.
1870 */
1871 for (;;) {
1872 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1873 break;
1874 if (cur.dentry == cur.mnt->mnt_root) {
1875 if (follow_up(&cur))
1876 continue;
1877 goto out_free;
1878 }
1879 if ((ncomponents & 15) == 0) {
1880 struct dentry **new;
1881 new = krealloc(components,
1882 sizeof(*new) * (ncomponents + 16),
1883 GFP_KERNEL);
1884 if (!new)
1885 goto out_free;
1886 components = new;
1887 }
1888 components[ncomponents++] = cur.dentry;
1889 cur.dentry = dget_parent(cur.dentry);
1890 }
ddd1ea56
BF		 1891 err = nfserr_resource;
1892 p = xdr_reserve_space(xdr, 4);
1893 if (!p)
ed748aac 1894 goto out_free;
c373b0a4 1895 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 1896
1897 while (ncomponents) {
1898 struct dentry *dentry = components[ncomponents - 1];
301f0268 1899 unsigned int len;
ed748aac 1900
301f0268
AV		 1901 spin_lock(&dentry->d_lock);
1902 len = dentry->d_name.len;
ddd1ea56
BF		 1903 p = xdr_reserve_space(xdr, len + 4);
1904 if (!p) {
301f0268 1905 spin_unlock(&dentry->d_lock);
ed748aac 1906 goto out_free;
301f0268 1907 }
0c0c267b 1908 p = xdr_encode_opaque(p, dentry->d_name.name, len);
ed748aac 1909 dprintk("/%s", dentry->d_name.name);
301f0268 1910 spin_unlock(&dentry->d_lock);
ed748aac
TM		 1911 dput(dentry);
1912 ncomponents--;
81c3f413 1913 }
ed748aac 1914
ed748aac
TM		 1915 err = 0;
1916out_free:
1917 dprintk(")\n");
1918 while (ncomponents)
1919 dput(components[--ncomponents]);
1920 kfree(components);
1921 path_put(&cur);
1922 return err;
1923}
1924
ddd1ea56
BF		 1925static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
1926 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 1927{
1928 struct svc_export *exp_ps;
1929 __be32 res;
1930
1931 exp_ps = rqst_find_fsidzero_export(rqstp);
1932 if (IS_ERR(exp_ps))
1933 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 1934 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 1935 exp_put(exp_ps);
1936 return res;
81c3f413
BF		 1937}
1938
1939/*
1940 * encode a fs_locations structure
1941 */
ddd1ea56
BF		 1942static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
1943 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 1944{
b37ad28b 1945 __be32 status;
cc45f017 1946 int i;
ddd1ea56 1947 __be32 *p;
81c3f413 1948 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1949
ddd1ea56 1950 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 1951 if (status)
1952 return status;
ddd1ea56
BF		 1953 p = xdr_reserve_space(xdr, 4);
1954 if (!p)
81c3f413 1955 return nfserr_resource;
c373b0a4 1956 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 1957 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 1958 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 1959 if (status)
1960 return status;
1961 }
81c3f413
BF		 1962 return 0;
1963}
1da177e4 1964
3d2544b1
BF		 1965static u32 nfs4_file_type(umode_t mode)
1966{
1967 switch (mode & S_IFMT) {
1968 case S_IFIFO: return NF4FIFO;
1969 case S_IFCHR: return NF4CHR;
1970 case S_IFDIR: return NF4DIR;
1971 case S_IFBLK: return NF4BLK;
1972 case S_IFLNK: return NF4LNK;
1973 case S_IFREG: return NF4REG;
1974 case S_IFSOCK: return NF4SOCK;
1975 default: return NF4BAD;
1976 };
1977}
1da177e4 1978
b37ad28b 1979static inline __be32
ddd1ea56
BF		 1980nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1981 struct nfs4_ace *ace)
1da177e4 1982{
3554116d 1983 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 1984 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 1985 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 1986 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 1987 else
ddd1ea56 1988 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 1989}
1990
42ca0993
BF		 1991#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1992 FATTR4_WORD0_RDATTR_ERROR)
1993#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1994
18032ca0
DQ		 1995#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1996static inline __be32
ddd1ea56
BF		 1997nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1998 void *context, int len)
18032ca0 1999{
ddd1ea56 2000 __be32 *p;
18032ca0 2001
ddd1ea56
BF		 2002 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2003 if (!p)
18032ca0
DQ		 2004 return nfserr_resource;
2005
2006 /*
2007 * For now we use a 0 here to indicate the null translation; in
2008 * the future we may place a call to translation code here.
2009 */
c373b0a4
BF		 2010 *p++ = cpu_to_be32(0); /* lfs */
2011 *p++ = cpu_to_be32(0); /* pi */
18032ca0 2012 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 2013 return 0;
2014}
2015#else
2016static inline __be32
ddd1ea56
BF		 2017nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2018 void *context, int len)
18032ca0
DQ		 2019{ return 0; }
2020#endif
2021
b37ad28b 2022static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 2023{
2024 /* As per referral draft: */
2025 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2026 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2027 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2028 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2029 *rdattr_err = NFSERR_MOVED;
2030 else
2031 return nfserr_moved;
2032 }
2033 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2034 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2035 return 0;
2036}
1da177e4 2037
ae7095a7
BF		 2038
2039static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2040{
2041 struct path path = exp->ex_path;
2042 int err;
2043
2044 path_get(&path);
2045 while (follow_up(&path)) {
2046 if (path.dentry != path.mnt->mnt_root)
2047 break;
2048 }
3dadecce 2049 err = vfs_getattr(&path, stat);
ae7095a7
BF		 2050 path_put(&path);
2051 return err;
2052}
2053
1da177e4
LT		 2054/*
2055 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2056 * ourselves.
1da177e4 2057 */
da2ebce6 2058static __be32
d5184658
BF		 2059nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2060 struct svc_export *exp,
2061 struct dentry *dentry, u32 *bmval,
406a7ea9 2062 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2063{
2064 u32 bmval0 = bmval[0];
2065 u32 bmval1 = bmval[1];
7e705706 2066 u32 bmval2 = bmval[2];
1da177e4 2067 struct kstat stat;
d50e6136 2068 struct svc_fh *tempfh = NULL;
1da177e4 2069 struct kstatfs statfs;
ddd1ea56 2070 __be32 *p;
1fcea5b2 2071 int starting_len = xdr->buf->len;
082d4bd7
BF		 2072 int attrlen_offset;
2073 __be32 attrlen;
1da177e4
LT		 2074 u32 dummy;
2075 u64 dummy64;
42ca0993 2076 u32 rdattr_err = 0;
b37ad28b 2077 __be32 status;
b8dd7b9a 2078 int err;
1da177e4
LT		 2079 int aclsupport = 0;
2080 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2081 void *context = NULL;
2082 int contextlen;
2083 bool contextsupport = false;
7e705706
AA		 2084 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2085 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2086 struct path path = {
2087 .mnt = exp->ex_path.mnt,
2088 .dentry = dentry,
2089 };
3d733711 2090 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2091
2092 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2093 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2094 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2095 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2096
42ca0993 2097 if (exp->ex_fslocs.migrated) {
7e705706 2098 BUG_ON(bmval[2]);
42ca0993
BF		 2099 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2100 if (status)
2101 goto out;
2102 }
2103
3dadecce 2104 err = vfs_getattr(&path, &stat);
b8dd7b9a 2105 if (err)
1da177e4 2106 goto out_nfserr;
12337901
CH		 2107 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2108 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2109 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2110 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2111 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2112 if (err)
1da177e4
LT		 2113 goto out_nfserr;
2114 }
2115 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2116 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2117 status = nfserr_jukebox;
2118 if (!tempfh)
2119 goto out;
2120 fh_init(tempfh, NFS4_FHSIZE);
2121 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2122 if (status)
2123 goto out;
d50e6136 2124 fhp = tempfh;
1da177e4
LT		 2125 }
2126 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2127 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2128 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2129 aclsupport = (err == 0);
1da177e4 2130 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2131 if (err == -EOPNOTSUPP)
1da177e4 2132 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2133 else if (err == -EINVAL) {
1da177e4
LT		 2134 status = nfserr_attrnotsupp;
2135 goto out;
b8dd7b9a 2136 } else if (err != 0)
1da177e4
LT		 2137 goto out_nfserr;
2138 }
2139 }
1da177e4 2140
18032ca0
DQ		 2141#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2142 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2143 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2144 err = security_inode_getsecctx(dentry->d_inode,
2145 &context, &contextlen);
2146 contextsupport = (err == 0);
2147 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2148 if (err == -EOPNOTSUPP)
2149 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2150 else if (err)
2151 goto out_nfserr;
2152 }
2153 }
2154#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2155
2b44f1ba 2156 if (bmval2) {
ddd1ea56
BF		 2157 p = xdr_reserve_space(xdr, 16);
2158 if (!p)
2b44f1ba 2159 goto out_resource;
c373b0a4
BF		 2160 *p++ = cpu_to_be32(3);
2161 *p++ = cpu_to_be32(bmval0);
2162 *p++ = cpu_to_be32(bmval1);
2163 *p++ = cpu_to_be32(bmval2);
2b44f1ba 2164 } else if (bmval1) {
ddd1ea56
BF		 2165 p = xdr_reserve_space(xdr, 12);
2166 if (!p)
2b44f1ba 2167 goto out_resource;
c373b0a4
BF		 2168 *p++ = cpu_to_be32(2);
2169 *p++ = cpu_to_be32(bmval0);
2170 *p++ = cpu_to_be32(bmval1);
7e705706 2171 } else {
ddd1ea56
BF		 2172 p = xdr_reserve_space(xdr, 8);
2173 if (!p)
2b44f1ba 2174 goto out_resource;
c373b0a4
BF		 2175 *p++ = cpu_to_be32(1);
2176 *p++ = cpu_to_be32(bmval0);
7e705706 2177 }
082d4bd7
BF		 2178
2179 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2180 p = xdr_reserve_space(xdr, 4);
2181 if (!p)
2182 goto out_resource;
082d4bd7 2183 p++; /* to be backfilled later */
1da177e4
LT		 2184
2185 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2186 u32 word0 = nfsd_suppattrs0(minorversion);
2187 u32 word1 = nfsd_suppattrs1(minorversion);
2188 u32 word2 = nfsd_suppattrs2(minorversion);
2189
42ca0993
BF		 2190 if (!aclsupport)
2191 word0 &= ~FATTR4_WORD0_ACL;
18032ca0
DQ		 2192 if (!contextsupport)
2193 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
7e705706 2194 if (!word2) {
ddd1ea56
BF		 2195 p = xdr_reserve_space(xdr, 12);
2196 if (!p)
2b44f1ba 2197 goto out_resource;
c373b0a4
BF		 2198 *p++ = cpu_to_be32(2);
2199 *p++ = cpu_to_be32(word0);
2200 *p++ = cpu_to_be32(word1);
7e705706 2201 } else {
ddd1ea56
BF		 2202 p = xdr_reserve_space(xdr, 16);
2203 if (!p)
2b44f1ba 2204 goto out_resource;
c373b0a4
BF		 2205 *p++ = cpu_to_be32(3);
2206 *p++ = cpu_to_be32(word0);
2207 *p++ = cpu_to_be32(word1);
2208 *p++ = cpu_to_be32(word2);
7e705706 2209 }
1da177e4
LT		 2210 }
2211 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2212 p = xdr_reserve_space(xdr, 4);
2213 if (!p)
1da177e4 2214 goto out_resource;
3d2544b1 2215 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2216 if (dummy == NF4BAD) {
2217 status = nfserr_serverfault;
2218 goto out;
2219 }
c373b0a4 2220 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2221 }
2222 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2223 p = xdr_reserve_space(xdr, 4);
2224 if (!p)
1da177e4 2225 goto out_resource;
49640001 2226 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2227 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2228 else
c373b0a4
BF		 2229 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2230 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2231 }
2232 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2233 p = xdr_reserve_space(xdr, 8);
2234 if (!p)
1da177e4 2235 goto out_resource;
d05d5744 2236 p = encode_change(p, &stat, dentry->d_inode);
1da177e4
LT		 2237 }
2238 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2239 p = xdr_reserve_space(xdr, 8);
2240 if (!p)
1da177e4 2241 goto out_resource;
b64c7f3b 2242 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2243 }
2244 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2245 p = xdr_reserve_space(xdr, 4);
2246 if (!p)
1da177e4 2247 goto out_resource;
c373b0a4 2248 *p++ = cpu_to_be32(1);
1da177e4
LT		 2249 }
2250 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2251 p = xdr_reserve_space(xdr, 4);
2252 if (!p)
1da177e4 2253 goto out_resource;
c373b0a4 2254 *p++ = cpu_to_be32(1);
1da177e4
LT		 2255 }
2256 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2257 p = xdr_reserve_space(xdr, 4);
2258 if (!p)
1da177e4 2259 goto out_resource;
c373b0a4 2260 *p++ = cpu_to_be32(0);
1da177e4
LT		 2261 }
2262 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2263 p = xdr_reserve_space(xdr, 16);
2264 if (!p)
1da177e4 2265 goto out_resource;
42ca0993 2266 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 2267 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2268 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2269 } else switch(fsid_source(fhp)) {
2270 case FSIDSOURCE_FSID:
b64c7f3b
BF		 2271 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2272 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 2273 break;
2274 case FSIDSOURCE_DEV:
c373b0a4
BF		 2275 *p++ = cpu_to_be32(0);
2276 *p++ = cpu_to_be32(MAJOR(stat.dev));
2277 *p++ = cpu_to_be32(0);
2278 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 2279 break;
2280 case FSIDSOURCE_UUID:
94eb3689
KM		 2281 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2282 EX_UUID_LEN);
af6a4e28 2283 break;
1da177e4
LT		 2284 }
2285 }
2286 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2287 p = xdr_reserve_space(xdr, 4);
2288 if (!p)
1da177e4 2289 goto out_resource;
c373b0a4 2290 *p++ = cpu_to_be32(0);
1da177e4
LT		 2291 }
2292 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2293 p = xdr_reserve_space(xdr, 4);
2294 if (!p)
1da177e4 2295 goto out_resource;
c373b0a4 2296 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 2297 }
2298 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2299 p = xdr_reserve_space(xdr, 4);
2300 if (!p)
1da177e4 2301 goto out_resource;
c373b0a4 2302 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 2303 }
2304 if (bmval0 & FATTR4_WORD0_ACL) {
2305 struct nfs4_ace *ace;
1da177e4
LT		 2306
2307 if (acl == NULL) {
ddd1ea56
BF		 2308 p = xdr_reserve_space(xdr, 4);
2309 if (!p)
1da177e4
LT		 2310 goto out_resource;
2311
c373b0a4 2312 *p++ = cpu_to_be32(0);
1da177e4
LT		 2313 goto out_acl;
2314 }
ddd1ea56
BF		 2315 p = xdr_reserve_space(xdr, 4);
2316 if (!p)
1da177e4 2317 goto out_resource;
c373b0a4 2318 *p++ = cpu_to_be32(acl->naces);
1da177e4 2319
28e05dd8 2320 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2321 p = xdr_reserve_space(xdr, 4*3);
2322 if (!p)
1da177e4 2323 goto out_resource;
c373b0a4
BF		 2324 *p++ = cpu_to_be32(ace->type);
2325 *p++ = cpu_to_be32(ace->flag);
2326 *p++ = cpu_to_be32(ace->access_mask &
2327 NFS4_ACE_MASK_ALL);
ddd1ea56 2328 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2329 if (status)
2330 goto out;
2331 }
2332 }
2333out_acl:
2334 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2335 p = xdr_reserve_space(xdr, 4);
2336 if (!p)
1da177e4 2337 goto out_resource;
c373b0a4 2338 *p++ = cpu_to_be32(aclsupport ?
1da177e4
LT		 2339 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2340 }
2341 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2342 p = xdr_reserve_space(xdr, 4);
2343 if (!p)
1da177e4 2344 goto out_resource;
c373b0a4 2345 *p++ = cpu_to_be32(1);
1da177e4
LT		 2346 }
2347 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2348 p = xdr_reserve_space(xdr, 4);
2349 if (!p)
1da177e4 2350 goto out_resource;
c373b0a4 2351 *p++ = cpu_to_be32(0);
1da177e4
LT		 2352 }
2353 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2354 p = xdr_reserve_space(xdr, 4);
2355 if (!p)
1da177e4 2356 goto out_resource;
c373b0a4 2357 *p++ = cpu_to_be32(1);
1da177e4
LT		 2358 }
2359 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2360 p = xdr_reserve_space(xdr, 4);
2361 if (!p)
1da177e4 2362 goto out_resource;
c373b0a4 2363 *p++ = cpu_to_be32(1);
1da177e4
LT		 2364 }
2365 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2366 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2367 if (!p)
1da177e4 2368 goto out_resource;
0c0c267b
BF		 2369 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2370 fhp->fh_handle.fh_size);
1da177e4
LT		 2371 }
2372 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2373 p = xdr_reserve_space(xdr, 8);
2374 if (!p)
1da177e4 2375 goto out_resource;
b64c7f3b 2376 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 2377 }
2378 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2379 p = xdr_reserve_space(xdr, 8);
2380 if (!p)
1da177e4 2381 goto out_resource;
b64c7f3b 2382 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2383 }
2384 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2385 p = xdr_reserve_space(xdr, 8);
2386 if (!p)
1da177e4 2387 goto out_resource;
b64c7f3b 2388 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2389 }
2390 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2391 p = xdr_reserve_space(xdr, 8);
2392 if (!p)
1da177e4 2393 goto out_resource;
b64c7f3b 2394 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 2395 }
81c3f413 2396 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2397 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2398 if (status)
2399 goto out;
2400 }
1da177e4 2401 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2402 p = xdr_reserve_space(xdr, 4);
2403 if (!p)
1da177e4 2404 goto out_resource;
c373b0a4 2405 *p++ = cpu_to_be32(1);
1da177e4
LT		 2406 }
2407 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2408 p = xdr_reserve_space(xdr, 8);
2409 if (!p)
1da177e4 2410 goto out_resource;
b64c7f3b 2411 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2412 }
2413 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2414 p = xdr_reserve_space(xdr, 4);
2415 if (!p)
1da177e4 2416 goto out_resource;
c373b0a4 2417 *p++ = cpu_to_be32(255);
1da177e4
LT		 2418 }
2419 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2420 p = xdr_reserve_space(xdr, 4);
2421 if (!p)
1da177e4 2422 goto out_resource;
c373b0a4 2423 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 2424 }
2425 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2426 p = xdr_reserve_space(xdr, 8);
2427 if (!p)
1da177e4 2428 goto out_resource;
b64c7f3b 2429 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2430 }
2431 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2432 p = xdr_reserve_space(xdr, 8);
2433 if (!p)
1da177e4 2434 goto out_resource;
b64c7f3b 2435 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2436 }
2437 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2438 p = xdr_reserve_space(xdr, 4);
2439 if (!p)
1da177e4 2440 goto out_resource;
c373b0a4 2441 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 2442 }
2443 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2444 p = xdr_reserve_space(xdr, 4);
2445 if (!p)
1da177e4 2446 goto out_resource;
c373b0a4 2447 *p++ = cpu_to_be32(1);
1da177e4
LT		 2448 }
2449 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2450 p = xdr_reserve_space(xdr, 4);
2451 if (!p)
1da177e4 2452 goto out_resource;
c373b0a4 2453 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 2454 }
2455 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2456 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2457 if (status)
2458 goto out;
2459 }
2460 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2461 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2462 if (status)
2463 goto out;
2464 }
2465 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2466 p = xdr_reserve_space(xdr, 8);
2467 if (!p)
1da177e4 2468 goto out_resource;
c373b0a4
BF		 2469 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2470 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 2471 }
2472 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2473 p = xdr_reserve_space(xdr, 8);
2474 if (!p)
1da177e4
LT		 2475 goto out_resource;
2476 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 2477 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2478 }
2479 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2480 p = xdr_reserve_space(xdr, 8);
2481 if (!p)
1da177e4
LT		 2482 goto out_resource;
2483 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 2484 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2485 }
2486 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2487 p = xdr_reserve_space(xdr, 8);
2488 if (!p)
1da177e4
LT		 2489 goto out_resource;
2490 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 2491 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2492 }
2493 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2494 p = xdr_reserve_space(xdr, 8);
2495 if (!p)
1da177e4
LT		 2496 goto out_resource;
2497 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 2498 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2499 }
2500 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2501 p = xdr_reserve_space(xdr, 12);
2502 if (!p)
1da177e4 2503 goto out_resource;
b64c7f3b 2504 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 2505 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 2506 }
2507 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2508 p = xdr_reserve_space(xdr, 12);
2509 if (!p)
1da177e4 2510 goto out_resource;
c373b0a4
BF		 2511 *p++ = cpu_to_be32(0);
2512 *p++ = cpu_to_be32(1);
2513 *p++ = cpu_to_be32(0);
1da177e4
LT		 2514 }
2515 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2516 p = xdr_reserve_space(xdr, 12);
2517 if (!p)
1da177e4 2518 goto out_resource;
b64c7f3b 2519 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 2520 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 2521 }
2522 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2523 p = xdr_reserve_space(xdr, 12);
2524 if (!p)
1da177e4 2525 goto out_resource;
b64c7f3b 2526 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 2527 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 2528 }
2529 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
ddd1ea56
BF		 2530 p = xdr_reserve_space(xdr, 8);
2531 if (!p)
1da177e4 2532 goto out_resource;
406a7ea9
FF		 2533 /*
2534 * Get parent's attributes if not ignoring crossmount
2535 * and this is the root of a cross-mounted filesystem.
2536 */
2537 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2538 dentry == exp->ex_path.mnt->mnt_root)
2539 get_parent_attributes(exp, &stat);
b64c7f3b 2540 p = xdr_encode_hyper(p, stat.ino);
1da177e4 2541 }
18032ca0 2542 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
ddd1ea56
BF		 2543 status = nfsd4_encode_security_label(xdr, rqstp, context,
2544 contextlen);
18032ca0
DQ		 2545 if (status)
2546 goto out;
2547 }
8c18f205 2548 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
ddd1ea56
BF		 2549 p = xdr_reserve_space(xdr, 16);
2550 if (!p)
de3997a7 2551 goto out_resource;
c373b0a4
BF		 2552 *p++ = cpu_to_be32(3);
2553 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2554 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2555 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
8c18f205 2556 }
7e705706 2557
082d4bd7
BF		 2558 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2559 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2560 status = nfs_ok;
2561
2562out:
ba4e55bb 2563#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2564 if (context)
2565 security_release_secctx(context, contextlen);
ba4e55bb 2566#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2567 kfree(acl);
18df11d0 2568 if (tempfh) {
d50e6136 2569 fh_put(tempfh);
18df11d0
YZ		 2570 kfree(tempfh);
2571 }
1fcea5b2
BF		 2572 if (status)
2573 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2574 return status;
2575out_nfserr:
b8dd7b9a 2576 status = nfserrno(err);
1da177e4
LT		 2577 goto out;
2578out_resource:
1da177e4
LT		 2579 status = nfserr_resource;
2580 goto out;
1da177e4
LT		 2581}
2582
2825a7f9
BF		 2583static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2584 struct xdr_buf *buf, __be32 *p, int bytes)
2585{
2586 xdr->scratch.iov_len = 0;
2587 memset(buf, 0, sizeof(struct xdr_buf));
2588 buf->head[0].iov_base = p;
2589 buf->head[0].iov_len = 0;
2590 buf->len = 0;
2591 xdr->buf = buf;
2592 xdr->iov = buf->head;
2593 xdr->p = p;
2594 xdr->end = (void *)p + bytes;
2595 buf->buflen = bytes;
2596}
2597
d5184658
BF		 2598__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2599 struct svc_fh *fhp, struct svc_export *exp,
2600 struct dentry *dentry, u32 *bmval,
2601 struct svc_rqst *rqstp, int ignore_crossmnt)
2602{
2825a7f9 2603 struct xdr_buf dummy;
d5184658
BF		 2604 struct xdr_stream xdr;
2605 __be32 ret;
2606
2825a7f9 2607 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2608 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2609 ignore_crossmnt);
2610 *p = xdr.p;
2611 return ret;
2612}
2613
c0ce6ec8
BF		 2614static inline int attributes_need_mount(u32 *bmval)
2615{
2616 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2617 return 1;
2618 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2619 return 1;
2620 return 0;
2621}
2622
b37ad28b 2623static __be32
561f0ed4
BF		 2624nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2625 const char *name, int namlen)
1da177e4
LT		 2626{
2627 struct svc_export *exp = cd->rd_fhp->fh_export;
2628 struct dentry *dentry;
b37ad28b 2629 __be32 nfserr;
406a7ea9 2630 int ignore_crossmnt = 0;
1da177e4
LT		 2631
2632 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2633 if (IS_ERR(dentry))
2634 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2635 if (!dentry->d_inode) {
2636 /*
2637 * nfsd_buffered_readdir drops the i_mutex between
2638 * readdir and calling this callback, leaving a window
2639 * where this directory entry could have gone away.
2640 */
2641 dput(dentry);
2642 return nfserr_noent;
2643 }
1da177e4
LT		 2644
2645 exp_get(exp);
406a7ea9
FF		 2646 /*
2647 * In the case of a mountpoint, the client may be asking for
2648 * attributes that are only properties of the underlying filesystem
2649 * as opposed to the cross-mounted file system. In such a case,
2650 * we will not follow the cross mount and will fill the attribtutes
2651 * directly from the mountpoint dentry.
2652 */
3227fa41 2653 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2654 int err;
2655
3227fa41
BF		 2656 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2657 && !attributes_need_mount(cd->rd_bmval)) {
2658 ignore_crossmnt = 1;
2659 goto out_encode;
2660 }
dcb488a3
AA		 2661 /*
2662 * Why the heck aren't we just using nfsd_lookup??
2663 * Different "."/".." handling? Something else?
2664 * At least, add a comment here to explain....
2665 */
021d3a72
BF		 2666 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2667 if (err) {
2668 nfserr = nfserrno(err);
1da177e4
LT		 2669 goto out_put;
2670 }
dcb488a3
AA		 2671 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2672 if (nfserr)
2673 goto out_put;
1da177e4
LT		 2674
2675 }
3227fa41 2676out_encode:
561f0ed4 2677 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 2678 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2679out_put:
2680 dput(dentry);
2681 exp_put(exp);
2682 return nfserr;
2683}
2684
2ebbc012 2685static __be32 *
561f0ed4 2686nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 2687{
561f0ed4
BF		 2688 __be32 *p;
2689
c3a45617 2690 p = xdr_reserve_space(xdr, 20);
561f0ed4 2691 if (!p)
1da177e4
LT		 2692 return NULL;
2693 *p++ = htonl(2);
2694 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2695 *p++ = htonl(0); /* bmval1 */
2696
87915c64 2697 *p++ = htonl(4); /* attribute length */
1da177e4 2698 *p++ = nfserr; /* no htonl */
1da177e4
LT		 2699 return p;
2700}
2701
2702static int
a0ad13ef
N		 2703nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2704 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2705{
a0ad13ef 2706 struct readdir_cd *ccd = ccdv;
1da177e4 2707 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 2708 struct xdr_stream *xdr = cd->xdr;
2709 int start_offset = xdr->buf->len;
2710 int cookie_offset;
aee37764 2711 u32 name_and_cookie;
561f0ed4 2712 int entry_bytes;
b37ad28b 2713 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 2714 __be64 wire_offset;
2715 __be32 *p;
1da177e4
LT		 2716
2717 /* In nfsv4, "." and ".." never make it onto the wire.. */
2718 if (name && isdotent(name, namlen)) {
2719 cd->common.err = nfs_ok;
2720 return 0;
2721 }
2722
561f0ed4
BF		 2723 if (cd->cookie_offset) {
2724 wire_offset = cpu_to_be64(offset);
2725 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2726 &wire_offset, 8);
2727 }
1da177e4 2728
561f0ed4
BF		 2729 p = xdr_reserve_space(xdr, 4);
2730 if (!p)
1da177e4 2731 goto fail;
1da177e4 2732 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 2733 cookie_offset = xdr->buf->len;
2734 p = xdr_reserve_space(xdr, 3*4 + namlen);
2735 if (!p)
2736 goto fail;
1da177e4
LT		 2737 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2738 p = xdr_encode_array(p, name, namlen); /* name length & name */
2739
561f0ed4 2740 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 2741 switch (nfserr) {
2742 case nfs_ok:
1da177e4
LT		 2743 break;
2744 case nfserr_resource:
2745 nfserr = nfserr_toosmall;
2746 goto fail;
b2c0cea6 2747 case nfserr_noent:
f41c5ad2 2748 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 2749 goto skip_entry;
1da177e4
LT		 2750 default:
2751 /*
2752 * If the client requested the RDATTR_ERROR attribute,
2753 * we stuff the error code into this attribute
2754 * and continue. If this attribute was not requested,
2755 * then in accordance with the spec, we fail the
2756 * entire READDIR operation(!)
2757 */
2758 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2759 goto fail;
561f0ed4 2760 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 2761 if (p == NULL) {
2762 nfserr = nfserr_toosmall;
1da177e4 2763 goto fail;
34081efc 2764 }
1da177e4 2765 }
561f0ed4
BF		 2766 nfserr = nfserr_toosmall;
2767 entry_bytes = xdr->buf->len - start_offset;
2768 if (entry_bytes > cd->rd_maxcount)
2769 goto fail;
2770 cd->rd_maxcount -= entry_bytes;
3b299709
BF		 2771 if (!cd->rd_dircount)
2772 goto fail;
aee37764
BF		 2773 /*
2774 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
2775 * let's always let through the first entry, at least:
2776 */
2777 name_and_cookie = 4 * XDR_QUADLEN(namlen) + 8;
2778 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
2779 goto fail;
2780 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
561f0ed4 2781 cd->cookie_offset = cookie_offset;
b2c0cea6 2782skip_entry:
1da177e4
LT		 2783 cd->common.err = nfs_ok;
2784 return 0;
2785fail:
561f0ed4 2786 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 2787 cd->common.err = nfserr;
2788 return -EINVAL;
2789}
2790
d0a381dd
BF		 2791static __be32
2792nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 2793{
bc749ca4 2794 __be32 *p;
e2f282b9 2795
d0a381dd
BF		 2796 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2797 if (!p)
2798 return nfserr_resource;
c373b0a4 2799 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 2800 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
2801 sizeof(stateid_opaque_t));
d0a381dd 2802 return 0;
e2f282b9
BH		 2803}
2804
695e12f8 2805static __be32
b37ad28b 2806nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2807{
d0a381dd 2808 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2809 __be32 *p;
1da177e4
LT		 2810
2811 if (!nfserr) {
d0a381dd
BF		 2812 p = xdr_reserve_space(xdr, 8);
2813 if (!p)
2814 return nfserr_resource;
c373b0a4
BF		 2815 *p++ = cpu_to_be32(access->ac_supported);
2816 *p++ = cpu_to_be32(access->ac_resp_access);
1da177e4 2817 }
695e12f8 2818 return nfserr;
1da177e4
LT		 2819}
2820
1d1bc8f2
BF		 2821static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2822{
d0a381dd 2823 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 2824 __be32 *p;
2825
2826 if (!nfserr) {
d0a381dd
BF		 2827 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2828 if (!p)
2829 return nfserr_resource;
0c0c267b
BF		 2830 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
2831 NFS4_MAX_SESSIONID_LEN);
c373b0a4 2832 *p++ = cpu_to_be32(bcts->dir);
6e67b5d1 2833 /* Sorry, we do not yet support RDMA over 4.1: */
c373b0a4 2834 *p++ = cpu_to_be32(0);
1d1bc8f2
BF		 2835 }
2836 return nfserr;
2837}
2838
695e12f8 2839static __be32
b37ad28b 2840nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 2841{
d0a381dd
BF		 2842 struct xdr_stream *xdr = &resp->xdr;
2843
e2f282b9 2844 if (!nfserr)
d0a381dd 2845 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
e2f282b9 2846
695e12f8 2847 return nfserr;
1da177e4
LT		 2848}
2849
2850
695e12f8 2851static __be32
b37ad28b 2852nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2853{
d0a381dd 2854 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2855 __be32 *p;
1da177e4
LT		 2856
2857 if (!nfserr) {
d0a381dd
BF		 2858 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
2859 if (!p)
2860 return nfserr_resource;
0c0c267b
BF		 2861 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
2862 NFS4_VERIFIER_SIZE);
1da177e4 2863 }
695e12f8 2864 return nfserr;
1da177e4
LT		 2865}
2866
695e12f8 2867static __be32
b37ad28b 2868nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2869{
d0a381dd 2870 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2871 __be32 *p;
1da177e4
LT		 2872
2873 if (!nfserr) {
d0a381dd
BF		 2874 p = xdr_reserve_space(xdr, 32);
2875 if (!p)
2876 return nfserr_resource;
d05d5744 2877 p = encode_cinfo(p, &create->cr_cinfo);
c373b0a4
BF		 2878 *p++ = cpu_to_be32(2);
2879 *p++ = cpu_to_be32(create->cr_bmval[0]);
2880 *p++ = cpu_to_be32(create->cr_bmval[1]);
1da177e4 2881 }
695e12f8 2882 return nfserr;
1da177e4
LT		 2883}
2884
b37ad28b
AV		 2885static __be32
2886nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2887{
2888 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 2889 struct xdr_stream *xdr = &resp->xdr;
1da177e4
LT		 2890
2891 if (nfserr)
2892 return nfserr;
2893
d5184658
BF		 2894 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2895 getattr->ga_bmval,
406a7ea9 2896 resp->rqstp, 0);
1da177e4
LT		 2897 return nfserr;
2898}
2899
695e12f8
BH		 2900static __be32
2901nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2902{
d0a381dd 2903 struct xdr_stream *xdr = &resp->xdr;
695e12f8 2904 struct svc_fh *fhp = *fhpp;
1da177e4 2905 unsigned int len;
bc749ca4 2906 __be32 *p;
1da177e4
LT		 2907
2908 if (!nfserr) {
2909 len = fhp->fh_handle.fh_size;
d0a381dd
BF		 2910 p = xdr_reserve_space(xdr, len + 4);
2911 if (!p)
2912 return nfserr_resource;
0c0c267b 2913 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
1da177e4 2914 }
695e12f8 2915 return nfserr;
1da177e4
LT		 2916}
2917
2918/*
2919* Including all fields other than the name, a LOCK4denied structure requires
2920* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2921*/
d0a381dd
BF		 2922static __be32
2923nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 2924{
7c13f344 2925 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2926 __be32 *p;
1da177e4 2927
8c7424cf 2928again:
d0a381dd 2929 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 2930 if (!p) {
2931 /*
2932 * Don't fail to return the result just because we can't
2933 * return the conflicting open:
2934 */
2935 if (conf->len) {
f98bac5a 2936 kfree(conf->data);
8c7424cf
BF		 2937 conf->len = 0;
2938 conf->data = NULL;
2939 goto again;
2940 }
d0a381dd 2941 return nfserr_resource;
8c7424cf 2942 }
b64c7f3b
BF		 2943 p = xdr_encode_hyper(p, ld->ld_start);
2944 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 2945 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 2946 if (conf->len) {
0c0c267b
BF		 2947 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
2948 p = xdr_encode_opaque(p, conf->data, conf->len);
f98bac5a 2949 kfree(conf->data);
1da177e4 2950 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 2951 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 2952 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 2953 }
d0a381dd 2954 return nfserr_denied;
1da177e4
LT		 2955}
2956
695e12f8 2957static __be32
b37ad28b 2958nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2959{
d0a381dd
BF		 2960 struct xdr_stream *xdr = &resp->xdr;
2961
e2f282b9 2962 if (!nfserr)
d0a381dd 2963 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 2964 else if (nfserr == nfserr_denied)
d0a381dd 2965 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
f98bac5a 2966
695e12f8 2967 return nfserr;
1da177e4
LT		 2968}
2969
695e12f8 2970static __be32
b37ad28b 2971nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 2972{
d0a381dd
BF		 2973 struct xdr_stream *xdr = &resp->xdr;
2974
1da177e4 2975 if (nfserr == nfserr_denied)
d0a381dd 2976 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 2977 return nfserr;
1da177e4
LT		 2978}
2979
695e12f8 2980static __be32
b37ad28b 2981nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 2982{
d0a381dd
BF		 2983 struct xdr_stream *xdr = &resp->xdr;
2984
e2f282b9 2985 if (!nfserr)
d0a381dd 2986 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
e2f282b9 2987
695e12f8 2988 return nfserr;
1da177e4
LT		 2989}
2990
2991
695e12f8 2992static __be32
b37ad28b 2993nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2994{
d0a381dd 2995 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2996 __be32 *p;
1da177e4
LT		 2997
2998 if (!nfserr) {
d0a381dd
BF		 2999 p = xdr_reserve_space(xdr, 20);
3000 if (!p)
3001 return nfserr_resource;
d05d5744 3002 p = encode_cinfo(p, &link->li_cinfo);
1da177e4 3003 }
695e12f8 3004 return nfserr;
1da177e4
LT		 3005}
3006
3007
695e12f8 3008static __be32
b37ad28b 3009nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 3010{
d0a381dd 3011 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3012 __be32 *p;
1da177e4
LT		 3013
3014 if (nfserr)
3015 goto out;
3016
d0a381dd
BF		 3017 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3018 if (nfserr)
3019 goto out;
3020 p = xdr_reserve_space(xdr, 40);
3021 if (!p)
3022 return nfserr_resource;
d05d5744 3023 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4
BF		 3024 *p++ = cpu_to_be32(open->op_rflags);
3025 *p++ = cpu_to_be32(2);
3026 *p++ = cpu_to_be32(open->op_bmval[0]);
3027 *p++ = cpu_to_be32(open->op_bmval[1]);
3028 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 3029
3030 switch (open->op_delegate_type) {
3031 case NFS4_OPEN_DELEGATE_NONE:
3032 break;
3033 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 3034 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3035 if (nfserr)
3036 return nfserr;
3037 p = xdr_reserve_space(xdr, 20);
3038 if (!p)
3039 return nfserr_resource;
c373b0a4 3040 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 3041
3042 /*
3043 * TODO: ACE's in delegations
3044 */
c373b0a4
BF		 3045 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3046 *p++ = cpu_to_be32(0);
3047 *p++ = cpu_to_be32(0);
3048 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 3049 break;
3050 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 3051 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3052 if (nfserr)
3053 return nfserr;
3054 p = xdr_reserve_space(xdr, 32);
3055 if (!p)
3056 return nfserr_resource;
c373b0a4 3057 *p++ = cpu_to_be32(0);
1da177e4
LT		 3058
3059 /*
3060 * TODO: space_limit's in delegations
3061 */
c373b0a4
BF		 3062 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3063 *p++ = cpu_to_be32(~(u32)0);
3064 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3065
3066 /*
3067 * TODO: ACE's in delegations
3068 */
c373b0a4
BF		 3069 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3070 *p++ = cpu_to_be32(0);
3071 *p++ = cpu_to_be32(0);
3072 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3073 break;
d24433cd
BH		 3074 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3075 switch (open->op_why_no_deleg) {
3076 case WND4_CONTENTION:
3077 case WND4_RESOURCE:
d0a381dd
BF		 3078 p = xdr_reserve_space(xdr, 8);
3079 if (!p)
3080 return nfserr_resource;
c373b0a4
BF		 3081 *p++ = cpu_to_be32(open->op_why_no_deleg);
3082 /* deleg signaling not supported yet: */
3083 *p++ = cpu_to_be32(0);
d24433cd
BH		 3084 break;
3085 default:
d0a381dd
BF		 3086 p = xdr_reserve_space(xdr, 4);
3087 if (!p)
3088 return nfserr_resource;
c373b0a4 3089 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3090 }
d24433cd 3091 break;
1da177e4
LT		 3092 default:
3093 BUG();
3094 }
3095 /* XXX save filehandle here */
3096out:
695e12f8 3097 return nfserr;
1da177e4
LT		 3098}
3099
695e12f8 3100static __be32
b37ad28b 3101nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3102{
d0a381dd
BF		 3103 struct xdr_stream *xdr = &resp->xdr;
3104
e2f282b9 3105 if (!nfserr)
d0a381dd 3106 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4 3107
695e12f8 3108 return nfserr;
1da177e4
LT		 3109}
3110
695e12f8 3111static __be32
b37ad28b 3112nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3113{
d0a381dd
BF		 3114 struct xdr_stream *xdr = &resp->xdr;
3115
e2f282b9 3116 if (!nfserr)
d0a381dd 3117 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4 3118
695e12f8 3119 return nfserr;
1da177e4
LT		 3120}
3121
dc97618d
BF		 3122static __be32 nfsd4_encode_splice_read(
3123 struct nfsd4_compoundres *resp,
3124 struct nfsd4_read *read,
3125 struct file *file, unsigned long maxcount)
1da177e4 3126{
ddd1ea56 3127 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3128 struct xdr_buf *buf = xdr->buf;
dc97618d 3129 u32 eof;
30596768 3130 int space_left;
dc97618d 3131 __be32 nfserr;
fec25fa4 3132 __be32 *p = xdr->p - 2;
1da177e4 3133
d5d5c304
KM		 3134 /* Make sure there will be room for padding if needed */
3135 if (xdr->end - xdr->p < 1)
d0a381dd 3136 return nfserr_resource;
dc97618d
BF		 3137
3138 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3139 read->rd_offset, &maxcount);
3140 if (nfserr) {
3141 /*
3142 * nfsd_splice_actor may have already messed with the
3143 * page length; reset it so as not to confuse
3144 * xdr_truncate_encode:
3145 */
34a78b48 3146 buf->page_len = 0;
dc97618d 3147 return nfserr;
b0e35fda 3148 }
1da177e4 3149
dc97618d
BF		 3150 eof = (read->rd_offset + maxcount >=
3151 read->rd_fhp->fh_dentry->d_inode->i_size);
4e21ac4b 3152
fec25fa4
BF		 3153 *(p++) = htonl(eof);
3154 *(p++) = htonl(maxcount);
dc97618d 3155
34a78b48
BF		 3156 buf->page_len = maxcount;
3157 buf->len += maxcount;
15b23ef5
BF		 3158 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3159 / PAGE_SIZE;
dc97618d
BF		 3160
3161 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3162 buf->tail[0].iov_base = xdr->p;
3163 buf->tail[0].iov_len = 0;
fec25fa4 3164 xdr->iov = buf->tail;
dc97618d 3165 if (maxcount&3) {
fec25fa4
BF		 3166 int pad = 4 - (maxcount&3);
3167
3168 *(xdr->p++) = 0;
3169
34a78b48 3170 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3171 buf->tail[0].iov_len = pad;
3172 buf->len += pad;
b0e35fda 3173 }
2825a7f9 3174
dc97618d 3175 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3176 buf->buflen - buf->len);
3177 buf->buflen = buf->len + space_left;
dc97618d
BF		 3178 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3179
3180 return 0;
3181}
3182
3183static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3184 struct nfsd4_read *read,
3185 struct file *file, unsigned long maxcount)
3186{
3187 struct xdr_stream *xdr = &resp->xdr;
3188 u32 eof;
3189 int v;
dc97618d 3190 int starting_len = xdr->buf->len - 8;
dc97618d 3191 long len;
b0420980 3192 int thislen;
dc97618d
BF		 3193 __be32 nfserr;
3194 __be32 tmp;
3195 __be32 *p;
b0420980
BF		 3196 u32 zzz = 0;
3197 int pad;
1da177e4
LT		 3198
3199 len = maxcount;
3200 v = 0;
6ff9897d 3201
1055414f 3202 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
b0420980
BF		 3203 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3204 WARN_ON_ONCE(!p);
3205 resp->rqstp->rq_vec[v].iov_base = p;
3206 resp->rqstp->rq_vec[v].iov_len = thislen;
3207 v++;
3208 len -= thislen;
3209
3210 while (len) {
6ff9897d 3211 thislen = min_t(long, len, PAGE_SIZE);
b0420980
BF		 3212 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3213 WARN_ON_ONCE(!p);
3214 resp->rqstp->rq_vec[v].iov_base = p;
6ff9897d 3215 resp->rqstp->rq_vec[v].iov_len = thislen;
1da177e4 3216 v++;
6ff9897d 3217 len -= thislen;
1da177e4
LT		 3218 }
3219 read->rd_vlen = v;
3220
dc97618d
BF		 3221 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3222 read->rd_vlen, &maxcount);
3223 if (nfserr)
1da177e4 3224 return nfserr;
b0420980 3225 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
dc97618d 3226
44524359
N		 3227 eof = (read->rd_offset + maxcount >=
3228 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4 3229
dc97618d
BF		 3230 tmp = htonl(eof);
3231 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3232 tmp = htonl(maxcount);
3233 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3234
b0420980
BF		 3235 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3236 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3237 &zzz, pad);
1da177e4 3238 return 0;
dc97618d
BF		 3239
3240}
3241
3242static __be32
3243nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3244 struct nfsd4_read *read)
3245{
3246 unsigned long maxcount;
3247 struct xdr_stream *xdr = &resp->xdr;
3248 struct file *file = read->rd_filp;
3249 int starting_len = xdr->buf->len;
3250 struct raparms *ra;
3251 __be32 *p;
3252 __be32 err;
3253
3254 if (nfserr)
3255 return nfserr;
3256
3257 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3258 if (!p) {
779fb0f3 3259 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
dc97618d
BF		 3260 return nfserr_resource;
3261 }
779fb0f3 3262 if (resp->xdr.buf->page_len && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
b0420980 3263 WARN_ON_ONCE(1);
dc97618d
BF		 3264 return nfserr_resource;
3265 }
dc97618d
BF		 3266 xdr_commit_encode(xdr);
3267
3268 maxcount = svc_max_payload(resp->rqstp);
3c7aa15d
KM		 3269 maxcount = min_t(unsigned long, maxcount, (xdr->buf->buflen - xdr->buf->len));
3270 maxcount = min_t(unsigned long, maxcount, read->rd_length);
dc97618d
BF		 3271
3272 if (!read->rd_filp) {
3273 err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
3274 &file, &ra);
3275 if (err)
3276 goto err_truncate;
3277 }
3278
779fb0f3 3279 if (file->f_op->splice_read && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
dc97618d
BF		 3280 err = nfsd4_encode_splice_read(resp, read, file, maxcount);
3281 else
3282 err = nfsd4_encode_readv(resp, read, file, maxcount);
3283
3284 if (!read->rd_filp)
3285 nfsd_put_tmp_read_open(file, ra);
3286
3287err_truncate:
3288 if (err)
3289 xdr_truncate_encode(xdr, starting_len);
3290 return err;
1da177e4
LT		 3291}
3292
b37ad28b
AV		 3293static __be32
3294nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3295{
3296 int maxcount;
476a7b1f
BF		 3297 __be32 wire_count;
3298 int zero = 0;
ddd1ea56 3299 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3300 int length_offset = xdr->buf->len;
bc749ca4 3301 __be32 *p;
1da177e4
LT		 3302
3303 if (nfserr)
3304 return nfserr;
2825a7f9
BF		 3305
3306 p = xdr_reserve_space(xdr, 4);
3307 if (!p)
3308 return nfserr_resource;
1da177e4 3309 maxcount = PAGE_SIZE;
d0a381dd 3310
476a7b1f
BF		 3311 p = xdr_reserve_space(xdr, maxcount);
3312 if (!p)
4e21ac4b 3313 return nfserr_resource;
1da177e4
LT		 3314 /*
3315 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3316 * if they would overflow the buffer. Is this kosher in NFSv4? If
3317 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3318 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3319 */
476a7b1f
BF		 3320 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3321 (char *)p, &maxcount);
1da177e4 3322 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3323 nfserr = nfserr_inval;
3324 if (nfserr) {
1fcea5b2 3325 xdr_truncate_encode(xdr, length_offset);
1da177e4 3326 return nfserr;
d3f627c8 3327 }
1da177e4 3328
476a7b1f
BF		 3329 wire_count = htonl(maxcount);
3330 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
69bbd9c7 3331 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
476a7b1f
BF		 3332 if (maxcount & 3)
3333 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3334 &zero, 4 - (maxcount&3));
1da177e4
LT		 3335 return 0;
3336}
3337
b37ad28b
AV		 3338static __be32
3339nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3340{
3341 int maxcount;
561f0ed4 3342 int bytes_left;
1da177e4 3343 loff_t offset;
561f0ed4 3344 __be64 wire_offset;
ddd1ea56 3345 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3346 int starting_len = xdr->buf->len;
bc749ca4 3347 __be32 *p;
1da177e4
LT		 3348
3349 if (nfserr)
3350 return nfserr;
1da177e4 3351
d0a381dd
BF		 3352 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3353 if (!p)
3354 return nfserr_resource;
1da177e4
LT		 3355
3356 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 3357 *p++ = cpu_to_be32(0);
3358 *p++ = cpu_to_be32(0);
4aea24b2
BF		 3359 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3360 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3361
3362 /*
561f0ed4
BF		 3363 * Number of bytes left for directory entries allowing for the
3364 * final 8 bytes of the readdir and a following failed op:
3365 */
3366 bytes_left = xdr->buf->buflen - xdr->buf->len
3367 - COMPOUND_ERR_SLACK_SPACE - 8;
3368 if (bytes_left < 0) {
3369 nfserr = nfserr_resource;
3370 goto err_no_verf;
3371 }
3372 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3373 /*
3374 * Note the rfc defines rd_maxcount as the size of the
3375 * READDIR4resok structure, which includes the verifier above
3376 * and the 8 bytes encoded at the end of this function:
1da177e4 3377 */
561f0ed4
BF		 3378 if (maxcount < 16) {
3379 nfserr = nfserr_toosmall;
1da177e4
LT		 3380 goto err_no_verf;
3381 }
561f0ed4 3382 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3383
aee37764
BF		 3384 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3385 if (!readdir->rd_dircount)
3386 readdir->rd_dircount = INT_MAX;
3387
561f0ed4
BF		 3388 readdir->xdr = xdr;
3389 readdir->rd_maxcount = maxcount;
1da177e4 3390 readdir->common.err = 0;
561f0ed4 3391 readdir->cookie_offset = 0;
1da177e4
LT		 3392
3393 offset = readdir->rd_cookie;
3394 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3395 &offset,
3396 &readdir->common, nfsd4_encode_dirent);
3397 if (nfserr == nfs_ok &&
3398 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3399 xdr->buf->len == starting_len + 8) {
3400 /* nothing encoded; which limit did we hit?: */
3401 if (maxcount - 16 < bytes_left)
3402 /* It was the fault of rd_maxcount: */
3403 nfserr = nfserr_toosmall;
3404 else
3405 /* We ran out of buffer space: */
3406 nfserr = nfserr_resource;
3407 }
1da177e4
LT		 3408 if (nfserr)
3409 goto err_no_verf;
3410
561f0ed4
BF		 3411 if (readdir->cookie_offset) {
3412 wire_offset = cpu_to_be64(offset);
3413 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3414 &wire_offset, 8);
3415 }
1da177e4 3416
561f0ed4
BF		 3417 p = xdr_reserve_space(xdr, 8);
3418 if (!p) {
3419 WARN_ON_ONCE(1);
3420 goto err_no_verf;
3421 }
1da177e4
LT		 3422 *p++ = 0; /* no more entries */
3423 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3424
3425 return 0;
3426err_no_verf:
1fcea5b2 3427 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3428 return nfserr;
3429}
3430
695e12f8 3431static __be32
b37ad28b 3432nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3433{
d0a381dd 3434 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3435 __be32 *p;
1da177e4
LT		 3436
3437 if (!nfserr) {
d0a381dd
BF		 3438 p = xdr_reserve_space(xdr, 20);
3439 if (!p)
3440 return nfserr_resource;
d05d5744 3441 p = encode_cinfo(p, &remove->rm_cinfo);
1da177e4 3442 }
695e12f8 3443 return nfserr;
1da177e4
LT		 3444}
3445
695e12f8 3446static __be32
b37ad28b 3447nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3448{
d0a381dd 3449 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3450 __be32 *p;
1da177e4
LT		 3451
3452 if (!nfserr) {
d0a381dd
BF		 3453 p = xdr_reserve_space(xdr, 40);
3454 if (!p)
3455 return nfserr_resource;
d05d5744
BF		 3456 p = encode_cinfo(p, &rename->rn_sinfo);
3457 p = encode_cinfo(p, &rename->rn_tinfo);
1da177e4 3458 }
695e12f8 3459 return nfserr;
1da177e4
LT		 3460}
3461
695e12f8 3462static __be32
d0a381dd 3463nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
a77c806f 3464 __be32 nfserr, struct svc_export *exp)
dcb488a3 3465{
676e4ebd 3466 u32 i, nflavs, supported;
4796f457
BF		 3467 struct exp_flavor_info *flavs;
3468 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3469 __be32 *p, *flavorsp;
3470 static bool report = true;
dcb488a3
AA		 3471
3472 if (nfserr)
3473 goto out;
d0a381dd 3474 nfserr = nfserr_resource;
4796f457
BF		 3475 if (exp->ex_nflavors) {
3476 flavs = exp->ex_flavors;
3477 nflavs = exp->ex_nflavors;
3478 } else { /* Handling of some defaults in absence of real secinfo: */
3479 flavs = def_flavs;
3480 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3481 nflavs = 2;
3482 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3483 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3484 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3485 nflavs = 1;
3486 flavs[0].pseudoflavor
3487 = svcauth_gss_flavor(exp->ex_client);
3488 } else {
3489 nflavs = 1;
3490 flavs[0].pseudoflavor
3491 = exp->ex_client->flavour->flavour;
3492 }
3493 }
3494
676e4ebd 3495 supported = 0;
d0a381dd
BF		 3496 p = xdr_reserve_space(xdr, 4);
3497 if (!p)
3498 goto out;
676e4ebd 3499 flavorsp = p++; /* to be backfilled later */
676e4ebd 3500
4796f457 3501 for (i = 0; i < nflavs; i++) {
676e4ebd 3502 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3503 struct rpcsec_gss_info info;
dcb488a3 3504
676e4ebd
CL		 3505 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3506 supported++;
d0a381dd
BF		 3507 p = xdr_reserve_space(xdr, 4 + 4 +
3508 XDR_LEN(info.oid.len) + 4 + 4);
3509 if (!p)
3510 goto out;
c373b0a4 3511 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 3512 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 3513 *p++ = cpu_to_be32(info.qop);
3514 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 3515 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3516 supported++;
d0a381dd
BF		 3517 p = xdr_reserve_space(xdr, 4);
3518 if (!p)
3519 goto out;
c373b0a4 3520 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 3521 } else {
3522 if (report)
3523 pr_warn("NFS: SECINFO: security flavor %u "
3524 "is not supported\n", pf);
dcb488a3
AA		 3525 }
3526 }
a77c806f 3527
676e4ebd
CL		 3528 if (nflavs != supported)
3529 report = false;
3530 *flavorsp = htonl(supported);
d0a381dd 3531 nfserr = 0;
dcb488a3
AA		 3532out:
3533 if (exp)
3534 exp_put(exp);
695e12f8 3535 return nfserr;
dcb488a3
AA		 3536}
3537
22b6dee8
MJ		 3538static __be32
3539nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3540 struct nfsd4_secinfo *secinfo)
3541{
d0a381dd
BF		 3542 struct xdr_stream *xdr = &resp->xdr;
3543
3544 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
22b6dee8
MJ		 3545}
3546
3547static __be32
3548nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3549 struct nfsd4_secinfo_no_name *secinfo)
3550{
d0a381dd
BF		 3551 struct xdr_stream *xdr = &resp->xdr;
3552
3553 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
22b6dee8
MJ		 3554}
3555
1da177e4
LT		 3556/*
3557 * The SETATTR encode routine is special -- it always encodes a bitmap,
3558 * regardless of the error status.
3559 */
695e12f8 3560static __be32
b37ad28b 3561nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3562{
d0a381dd 3563 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3564 __be32 *p;
1da177e4 3565
d0a381dd
BF		 3566 p = xdr_reserve_space(xdr, 16);
3567 if (!p)
3568 return nfserr_resource;
1da177e4 3569 if (nfserr) {
c373b0a4
BF		 3570 *p++ = cpu_to_be32(3);
3571 *p++ = cpu_to_be32(0);
3572 *p++ = cpu_to_be32(0);
3573 *p++ = cpu_to_be32(0);
1da177e4
LT		 3574 }
3575 else {
c373b0a4
BF		 3576 *p++ = cpu_to_be32(3);
3577 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3578 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3579 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 3580 }
695e12f8 3581 return nfserr;
1da177e4
LT		 3582}
3583
695e12f8 3584static __be32
b37ad28b 3585nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3586{
d0a381dd 3587 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3588 __be32 *p;
1da177e4
LT		 3589
3590 if (!nfserr) {
d0a381dd
BF		 3591 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3592 if (!p)
3593 return nfserr_resource;
0c0c267b
BF		 3594 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3595 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3596 NFS4_VERIFIER_SIZE);
1da177e4
LT		 3597 }
3598 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3599 p = xdr_reserve_space(xdr, 8);
3600 if (!p)
3601 return nfserr_resource;
c373b0a4
BF		 3602 *p++ = cpu_to_be32(0);
3603 *p++ = cpu_to_be32(0);
1da177e4 3604 }
695e12f8 3605 return nfserr;
1da177e4
LT		 3606}
3607
695e12f8 3608static __be32
b37ad28b 3609nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3610{
d0a381dd 3611 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3612 __be32 *p;
1da177e4
LT		 3613
3614 if (!nfserr) {
d0a381dd
BF		 3615 p = xdr_reserve_space(xdr, 16);
3616 if (!p)
3617 return nfserr_resource;
c373b0a4
BF		 3618 *p++ = cpu_to_be32(write->wr_bytes_written);
3619 *p++ = cpu_to_be32(write->wr_how_written);
0c0c267b
BF		 3620 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3621 NFS4_VERIFIER_SIZE);
1da177e4 3622 }
695e12f8 3623 return nfserr;
1da177e4
LT		 3624}
3625
57266a6e
BF		 3626static const u32 nfs4_minimal_spo_must_enforce[2] = {
3627 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3628 1 << (OP_EXCHANGE_ID - 32) |
3629 1 << (OP_CREATE_SESSION - 32) |
3630 1 << (OP_DESTROY_SESSION - 32) |
3631 1 << (OP_DESTROY_CLIENTID - 32)
3632};
3633
2db134eb 3634static __be32
57b7b43b 3635nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3636 struct nfsd4_exchange_id *exid)
3637{
d0a381dd 3638 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3639 __be32 *p;
0733d213
AA		 3640 char *major_id;
3641 char *server_scope;
3642 int major_id_sz;
3643 int server_scope_sz;
3644 uint64_t minor_id = 0;
3645
3646 if (nfserr)
3647 return nfserr;
3648
3649 major_id = utsname()->nodename;
3650 major_id_sz = strlen(major_id);
3651 server_scope = utsname()->nodename;
3652 server_scope_sz = strlen(server_scope);
3653
d0a381dd 3654 p = xdr_reserve_space(xdr,
0733d213
AA		 3655 8 /* eir_clientid */ +
3656 4 /* eir_sequenceid */ +
3657 4 /* eir_flags */ +
a8bb84bc 3658 4 /* spr_how */);
d0a381dd
BF		 3659 if (!p)
3660 return nfserr_resource;
0733d213 3661
0c0c267b 3662 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 3663 *p++ = cpu_to_be32(exid->seqid);
3664 *p++ = cpu_to_be32(exid->flags);
0733d213 3665
c373b0a4 3666 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 3667
57266a6e
BF		 3668 switch (exid->spa_how) {
3669 case SP4_NONE:
3670 break;
3671 case SP4_MACH_CRED:
a8bb84bc 3672 /* spo_must_enforce, spo_must_allow */
d0a381dd
BF		 3673 p = xdr_reserve_space(xdr, 16);
3674 if (!p)
3675 return nfserr_resource;
a8bb84bc 3676
57266a6e 3677 /* spo_must_enforce bitmap: */
c373b0a4
BF		 3678 *p++ = cpu_to_be32(2);
3679 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3680 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
57266a6e 3681 /* empty spo_must_allow bitmap: */
c373b0a4 3682 *p++ = cpu_to_be32(0);
a8bb84bc 3683
57266a6e
BF		 3684 break;
3685 default:
3686 WARN_ON_ONCE(1);
3687 }
0733d213 3688
d0a381dd 3689 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3690 8 /* so_minor_id */ +
3691 4 /* so_major_id.len */ +
3692 (XDR_QUADLEN(major_id_sz) * 4) +
3693 4 /* eir_server_scope.len */ +
3694 (XDR_QUADLEN(server_scope_sz) * 4) +
3695 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3696 if (!p)
3697 return nfserr_resource;
a8bb84bc 3698
0733d213 3699 /* The server_owner struct */
b64c7f3b 3700 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 3701 /* major id */
0c0c267b 3702 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 3703
3704 /* Server scope */
0c0c267b 3705 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 3706
3707 /* Implementation id */
c373b0a4 3708 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 3709 return 0;
2db134eb
AA		 3710}
3711
3712static __be32
57b7b43b 3713nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3714 struct nfsd4_create_session *sess)
3715{
d0a381dd 3716 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3717 __be32 *p;
ec6b5d7b
AA		 3718
3719 if (nfserr)
3720 return nfserr;
3721
d0a381dd
BF		 3722 p = xdr_reserve_space(xdr, 24);
3723 if (!p)
3724 return nfserr_resource;
0c0c267b
BF		 3725 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3726 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3727 *p++ = cpu_to_be32(sess->seqid);
3728 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 3729
d0a381dd
BF		 3730 p = xdr_reserve_space(xdr, 28);
3731 if (!p)
3732 return nfserr_resource;
c373b0a4
BF		 3733 *p++ = cpu_to_be32(0); /* headerpadsz */
3734 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3735 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3736 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3737 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3738 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3739 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3740
3741 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 3742 p = xdr_reserve_space(xdr, 4);
3743 if (!p)
3744 return nfserr_resource;
c373b0a4 3745 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 3746 }
3747
d0a381dd
BF		 3748 p = xdr_reserve_space(xdr, 28);
3749 if (!p)
3750 return nfserr_resource;
c373b0a4
BF		 3751 *p++ = cpu_to_be32(0); /* headerpadsz */
3752 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3753 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3754 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3755 *p++ = cpu_to_be32(sess->back_channel.maxops);
3756 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3757 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3758
3759 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 3760 p = xdr_reserve_space(xdr, 4);
3761 if (!p)
3762 return nfserr_resource;
c373b0a4 3763 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 3764 }
3765 return 0;
2db134eb
AA		 3766}
3767
c47d832b 3768static __be32
57b7b43b 3769nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3770 struct nfsd4_sequence *seq)
3771{
d0a381dd 3772 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3773 __be32 *p;
b85d4c01
BH		 3774
3775 if (nfserr)
3776 return nfserr;
3777
d0a381dd
BF		 3778 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3779 if (!p)
3780 return nfserr_resource;
0c0c267b
BF		 3781 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
3782 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3783 *p++ = cpu_to_be32(seq->seqid);
3784 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 3785 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 3786 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
3787 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
3788 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 3789
f5236013 3790 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 3791 return 0;
2db134eb
AA		 3792}
3793
2355c596 3794static __be32
57b7b43b 3795nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3796 struct nfsd4_test_stateid *test_stateid)
3797{
d0a381dd 3798 struct xdr_stream *xdr = &resp->xdr;
03cfb420 3799 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3800 __be32 *p;
17456804 3801
a11fcce1
BF		 3802 if (nfserr)
3803 return nfserr;
3804
d0a381dd
BF		 3805 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3806 if (!p)
3807 return nfserr_resource;
17456804 3808 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3809
03cfb420 3810 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3811 *p++ = stateid->ts_id_status;
17456804 3812 }
17456804
BS		 3813
3814 return nfserr;
3815}
3816
24bab491
AS		 3817static __be32
3818nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
3819 struct nfsd4_seek *seek)
3820{
3821 __be32 *p;
3822
3823 if (nfserr)
3824 return nfserr;
3825
3826 p = xdr_reserve_space(&resp->xdr, 4 + 8);
3827 *p++ = cpu_to_be32(seek->seek_eof);
3828 p = xdr_encode_hyper(p, seek->seek_pos);
3829
3830 return nfserr;
3831}
3832
695e12f8
BH		 3833static __be32
3834nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3835{
3836 return nfserr;
3837}
3838
3839typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3840
2db134eb
AA		 3841/*
3842 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3843 * since we don't need to filter out obsolete ops as this is
3844 * done in the decoding phase.
3845 */
695e12f8 3846static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3847 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3848 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3849 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3850 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3851 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3852 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3853 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3854 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3855 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3856 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3857 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3858 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3859 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3860 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3861 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3862 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3863 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3864 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3865 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3866 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3867 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3868 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3869 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3870 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3871 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3872 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3873 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3874 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3875 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3876 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3877 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3878 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3879 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3880 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3881 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3882 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3883 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3884
3885 /* NFSv4.1 operations */
3886 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3887 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3888 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3889 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 3890 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3891 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3892 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3893 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3894 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3895 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3896 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3897 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3898 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3899 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3900 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3901 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3902 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3903 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3904 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
87a15a80
AS		 3905
3906 /* NFSv4.2 operations */
3907 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
3908 [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop,
3909 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
3910 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
3911 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
3912 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
3913 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
3914 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
3915 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
3916 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
24bab491 3917 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
87a15a80 3918 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3919};
3920
496c262c 3921/*
a8095f7e
BF		 3922 * Calculate whether we still have space to encode repsize bytes.
3923 * There are two considerations:
3924 * - For NFS versions >=4.1, the size of the reply must stay within
3925 * session limits
3926 * - For all NFS versions, we must stay within limited preallocated
3927 * buffer space.
496c262c 3928 *
a8095f7e
BF		 3929 * This is called before the operation is processed, so can only provide
3930 * an upper estimate. For some nonidempotent operations (such as
3931 * getattr), it's not necessarily a problem if that estimate is wrong,
3932 * as we can fail it after processing without significant side effects.
496c262c 3933 */
a8095f7e 3934__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 3935{
67492c99 3936 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 3937 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 3938
47ee5298
BF		 3939 if (buf->len + respsize <= buf->buflen)
3940 return nfs_ok;
3941 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 3942 return nfserr_resource;
47ee5298
BF		 3943 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
3944 WARN_ON_ONCE(1);
3945 return nfserr_rep_too_big_to_cache;
ea8d7720 3946 }
47ee5298 3947 return nfserr_rep_too_big;
496c262c
AA		 3948}
3949
1da177e4
LT		 3950void
3951nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3952{
082d4bd7 3953 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 3954 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 3955 struct svc_rqst *rqstp = resp->rqstp;
082d4bd7 3956 int post_err_offset;
07d1f802 3957 nfsd4_enc encoder;
bc749ca4 3958 __be32 *p;
1da177e4 3959
d0a381dd
BF		 3960 p = xdr_reserve_space(xdr, 8);
3961 if (!p) {
3962 WARN_ON_ONCE(1);
3963 return;
3964 }
c373b0a4 3965 *p++ = cpu_to_be32(op->opnum);
082d4bd7 3966 post_err_offset = xdr->buf->len;
1da177e4 3967
695e12f8
BH		 3968 if (op->opnum == OP_ILLEGAL)
3969 goto status;
3970 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3971 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 3972 encoder = nfsd4_enc_ops[op->opnum];
3973 op->status = encoder(resp, op->status, &op->u);
2825a7f9
BF		 3974 xdr_commit_encode(xdr);
3975
067e1ace 3976 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 3977 if (!op->status) {
3978 int space_needed = 0;
3979 if (!nfsd4_last_compound_op(rqstp))
3980 space_needed = COMPOUND_ERR_SLACK_SPACE;
3981 op->status = nfsd4_check_resp_size(resp, space_needed);
3982 }
c8f13d97
BF		 3983 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
3984 struct nfsd4_slot *slot = resp->cstate.slot;
3985
3986 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
3987 op->status = nfserr_rep_too_big_to_cache;
3988 else
3989 op->status = nfserr_rep_too_big;
3990 }
07d1f802
BF		 3991 if (op->status == nfserr_resource ||
3992 op->status == nfserr_rep_too_big ||
3993 op->status == nfserr_rep_too_big_to_cache) {
3994 /*
3995 * The operation may have already been encoded or
3996 * partially encoded. No op returns anything additional
3997 * in the case of one of these three errors, so we can
3998 * just truncate back to after the status. But it's a
3999 * bug if we had to do this on a non-idempotent op:
4000 */
4001 warn_on_nonidempotent_op(op);
082d4bd7 4002 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 4003 }
9411b1d4 4004 if (so) {
082d4bd7
BF		 4005 int len = xdr->buf->len - post_err_offset;
4006
9411b1d4 4007 so->so_replay.rp_status = op->status;
082d4bd7
BF		 4008 so->so_replay.rp_buflen = len;
4009 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4010 so->so_replay.rp_buf, len);
9411b1d4 4011 }
695e12f8 4012status:
082d4bd7
BF		 4013 /* Note that op->status is already in network byte order: */
4014 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 4015}
4016
4017/*
4018 * Encode the reply stored in the stateowner reply cache
4019 *
4020 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4021 * previously sent already encoded operation.
1da177e4
LT		 4022 */
4023void
d0a381dd 4024nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 4025{
bc749ca4 4026 __be32 *p;
1da177e4
LT		 4027 struct nfs4_replay *rp = op->replay;
4028
4029 BUG_ON(!rp);
4030
d0a381dd
BF		 4031 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4032 if (!p) {
4033 WARN_ON_ONCE(1);
4034 return;
4035 }
c373b0a4 4036 *p++ = cpu_to_be32(op->opnum);
1da177e4 4037 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 4038
0c0c267b 4039 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 4040}
4041
1da177e4 4042int
2ebbc012 4043nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 4044{
4045 return xdr_ressize_check(rqstp, p);
4046}
4047
3e98abff 4048int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 4049{
3e98abff
BF		 4050 struct svc_rqst *rqstp = rq;
4051 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4052
1da177e4
LT		 4053 if (args->ops != args->iops) {
4054 kfree(args->ops);
4055 args->ops = args->iops;
4056 }
f99d49ad
JJ		 4057 kfree(args->tmpp);
4058 args->tmpp = NULL;
1da177e4 4059 while (args->to_free) {
d5e23383 4060 struct svcxdr_tmpbuf *tb = args->to_free;
1da177e4 4061 args->to_free = tb->next;
1da177e4
LT		 4062 kfree(tb);
4063 }
3e98abff 4064 return 1;
1da177e4
LT		 4065}
4066
4067int
2ebbc012 4068nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 4069{
e874f9f8
JL		 4070 if (rqstp->rq_arg.head[0].iov_len % 4) {
4071 /* client is nuts */
4072 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4073 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4074 return 0;
4075 }
1da177e4
LT		 4076 args->p = p;
4077 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4078 args->pagelist = rqstp->rq_arg.pages;
4079 args->pagelen = rqstp->rq_arg.page_len;
4080 args->tmpp = NULL;
4081 args->to_free = NULL;
4082 args->ops = args->iops;
4083 args->rqstp = rqstp;
4084
3e98abff 4085 return !nfsd4_decode_compound(args);
1da177e4
LT		 4086}
4087
4088int
2ebbc012 4089nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 4090{
4091 /*
4092 * All that remains is to write the tag and operation count...
4093 */
6ac90391
BF		 4094 struct xdr_buf *buf = resp->xdr.buf;
4095
4096 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4097 buf->tail[0].iov_len);
dd97fdde 4098
2825a7f9
BF		 4099 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4100
1da177e4
LT		 4101 p = resp->tagp;
4102 *p++ = htonl(resp->taglen);
4103 memcpy(p, resp->tag, resp->taglen);
4104 p += XDR_QUADLEN(resp->taglen);
4105 *p++ = htonl(resp->opcnt);
4106
b607664e 4107 nfsd4_sequence_done(resp);
1da177e4
LT		 4108 return 1;
4109}
4110
4111/*
4112 * Local variables:
4113 * c-basic-offset: 8
4114 * End:
4115 */
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