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[people/ms/linux.git] / fs / nfsd / nfs4xdr.c
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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++;
1815 str = end;
1816 }
082d4bd7
BF		 1817 pathlen = htonl(xdr->buf->len - pathlen_offset);
1818 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 1819 return 0;
1820}
1821
e7a0444a
WAA		 1822/* Encode as an array of strings the string given with components
1823 * separated @sep.
1824 */
ddd1ea56
BF		 1825static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1826 char *components)
e7a0444a 1827{
ddd1ea56 1828 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 1829}
1830
81c3f413
BF		 1831/*
1832 * encode a location element of a fs_locations structure
1833 */
ddd1ea56
BF		 1834static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1835 struct nfsd4_fs_location *location)
81c3f413 1836{
b37ad28b 1837 __be32 status;
81c3f413 1838
ddd1ea56 1839 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 1840 '[', ']');
81c3f413
BF		 1841 if (status)
1842 return status;
ddd1ea56 1843 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 1844 if (status)
1845 return status;
81c3f413
BF		 1846 return 0;
1847}
1848
1849/*
ed748aac 1850 * Encode a path in RFC3530 'pathname4' format
81c3f413 1851 */
ddd1ea56
BF		 1852static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1853 const struct path *root,
1854 const struct path *path)
81c3f413 1855{
301f0268 1856 struct path cur = *path;
ddd1ea56 1857 __be32 *p;
ed748aac
TM		 1858 struct dentry **components = NULL;
1859 unsigned int ncomponents = 0;
1860 __be32 err = nfserr_jukebox;
81c3f413 1861
ed748aac 1862 dprintk("nfsd4_encode_components(");
81c3f413 1863
ed748aac
TM		 1864 path_get(&cur);
1865 /* First walk the path up to the nfsd root, and store the
1866 * dentries/path components in an array.
1867 */
1868 for (;;) {
1869 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1870 break;
1871 if (cur.dentry == cur.mnt->mnt_root) {
1872 if (follow_up(&cur))
1873 continue;
1874 goto out_free;
1875 }
1876 if ((ncomponents & 15) == 0) {
1877 struct dentry **new;
1878 new = krealloc(components,
1879 sizeof(*new) * (ncomponents + 16),
1880 GFP_KERNEL);
1881 if (!new)
1882 goto out_free;
1883 components = new;
1884 }
1885 components[ncomponents++] = cur.dentry;
1886 cur.dentry = dget_parent(cur.dentry);
1887 }
ddd1ea56
BF		 1888 err = nfserr_resource;
1889 p = xdr_reserve_space(xdr, 4);
1890 if (!p)
ed748aac 1891 goto out_free;
c373b0a4 1892 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 1893
1894 while (ncomponents) {
1895 struct dentry *dentry = components[ncomponents - 1];
301f0268 1896 unsigned int len;
ed748aac 1897
301f0268
AV		 1898 spin_lock(&dentry->d_lock);
1899 len = dentry->d_name.len;
ddd1ea56
BF		 1900 p = xdr_reserve_space(xdr, len + 4);
1901 if (!p) {
301f0268 1902 spin_unlock(&dentry->d_lock);
ed748aac 1903 goto out_free;
301f0268 1904 }
0c0c267b 1905 p = xdr_encode_opaque(p, dentry->d_name.name, len);
ed748aac 1906 dprintk("/%s", dentry->d_name.name);
301f0268 1907 spin_unlock(&dentry->d_lock);
ed748aac
TM		 1908 dput(dentry);
1909 ncomponents--;
81c3f413 1910 }
ed748aac 1911
ed748aac
TM		 1912 err = 0;
1913out_free:
1914 dprintk(")\n");
1915 while (ncomponents)
1916 dput(components[--ncomponents]);
1917 kfree(components);
1918 path_put(&cur);
1919 return err;
1920}
1921
ddd1ea56
BF		 1922static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
1923 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 1924{
1925 struct svc_export *exp_ps;
1926 __be32 res;
1927
1928 exp_ps = rqst_find_fsidzero_export(rqstp);
1929 if (IS_ERR(exp_ps))
1930 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 1931 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 1932 exp_put(exp_ps);
1933 return res;
81c3f413
BF		 1934}
1935
1936/*
1937 * encode a fs_locations structure
1938 */
ddd1ea56
BF		 1939static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
1940 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 1941{
b37ad28b 1942 __be32 status;
cc45f017 1943 int i;
ddd1ea56 1944 __be32 *p;
81c3f413 1945 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1946
ddd1ea56 1947 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 1948 if (status)
1949 return status;
ddd1ea56
BF		 1950 p = xdr_reserve_space(xdr, 4);
1951 if (!p)
81c3f413 1952 return nfserr_resource;
c373b0a4 1953 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 1954 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 1955 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 1956 if (status)
1957 return status;
1958 }
81c3f413
BF		 1959 return 0;
1960}
1da177e4 1961
3d2544b1
BF		 1962static u32 nfs4_file_type(umode_t mode)
1963{
1964 switch (mode & S_IFMT) {
1965 case S_IFIFO: return NF4FIFO;
1966 case S_IFCHR: return NF4CHR;
1967 case S_IFDIR: return NF4DIR;
1968 case S_IFBLK: return NF4BLK;
1969 case S_IFLNK: return NF4LNK;
1970 case S_IFREG: return NF4REG;
1971 case S_IFSOCK: return NF4SOCK;
1972 default: return NF4BAD;
1973 };
1974}
1da177e4 1975
b37ad28b 1976static inline __be32
ddd1ea56
BF		 1977nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1978 struct nfs4_ace *ace)
1da177e4 1979{
3554116d 1980 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 1981 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 1982 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 1983 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 1984 else
ddd1ea56 1985 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 1986}
1987
42ca0993
BF		 1988#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1989 FATTR4_WORD0_RDATTR_ERROR)
1990#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1991
18032ca0
DQ		 1992#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1993static inline __be32
ddd1ea56
BF		 1994nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1995 void *context, int len)
18032ca0 1996{
ddd1ea56 1997 __be32 *p;
18032ca0 1998
ddd1ea56
BF		 1999 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2000 if (!p)
18032ca0
DQ		 2001 return nfserr_resource;
2002
2003 /*
2004 * For now we use a 0 here to indicate the null translation; in
2005 * the future we may place a call to translation code here.
2006 */
c373b0a4
BF		 2007 *p++ = cpu_to_be32(0); /* lfs */
2008 *p++ = cpu_to_be32(0); /* pi */
18032ca0 2009 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 2010 return 0;
2011}
2012#else
2013static inline __be32
ddd1ea56
BF		 2014nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2015 void *context, int len)
18032ca0
DQ		 2016{ return 0; }
2017#endif
2018
b37ad28b 2019static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 2020{
2021 /* As per referral draft: */
2022 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2023 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2024 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2025 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2026 *rdattr_err = NFSERR_MOVED;
2027 else
2028 return nfserr_moved;
2029 }
2030 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2031 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2032 return 0;
2033}
1da177e4 2034
ae7095a7
BF		 2035
2036static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2037{
2038 struct path path = exp->ex_path;
2039 int err;
2040
2041 path_get(&path);
2042 while (follow_up(&path)) {
2043 if (path.dentry != path.mnt->mnt_root)
2044 break;
2045 }
3dadecce 2046 err = vfs_getattr(&path, stat);
ae7095a7
BF		 2047 path_put(&path);
2048 return err;
2049}
2050
1da177e4
LT		 2051/*
2052 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2053 * ourselves.
1da177e4 2054 */
da2ebce6 2055static __be32
d5184658
BF		 2056nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2057 struct svc_export *exp,
2058 struct dentry *dentry, u32 *bmval,
406a7ea9 2059 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2060{
2061 u32 bmval0 = bmval[0];
2062 u32 bmval1 = bmval[1];
7e705706 2063 u32 bmval2 = bmval[2];
1da177e4 2064 struct kstat stat;
d50e6136 2065 struct svc_fh *tempfh = NULL;
1da177e4 2066 struct kstatfs statfs;
ddd1ea56 2067 __be32 *p;
1fcea5b2 2068 int starting_len = xdr->buf->len;
082d4bd7
BF		 2069 int attrlen_offset;
2070 __be32 attrlen;
1da177e4
LT		 2071 u32 dummy;
2072 u64 dummy64;
42ca0993 2073 u32 rdattr_err = 0;
b37ad28b 2074 __be32 status;
b8dd7b9a 2075 int err;
1da177e4
LT		 2076 int aclsupport = 0;
2077 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2078 void *context = NULL;
2079 int contextlen;
2080 bool contextsupport = false;
7e705706
AA		 2081 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2082 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2083 struct path path = {
2084 .mnt = exp->ex_path.mnt,
2085 .dentry = dentry,
2086 };
3d733711 2087 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2088
2089 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2090 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2091 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2092 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2093
42ca0993 2094 if (exp->ex_fslocs.migrated) {
7e705706 2095 BUG_ON(bmval[2]);
42ca0993
BF		 2096 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2097 if (status)
2098 goto out;
2099 }
2100
3dadecce 2101 err = vfs_getattr(&path, &stat);
b8dd7b9a 2102 if (err)
1da177e4 2103 goto out_nfserr;
12337901
CH		 2104 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2105 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2106 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2107 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2108 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2109 if (err)
1da177e4
LT		 2110 goto out_nfserr;
2111 }
2112 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2113 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2114 status = nfserr_jukebox;
2115 if (!tempfh)
2116 goto out;
2117 fh_init(tempfh, NFS4_FHSIZE);
2118 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2119 if (status)
2120 goto out;
d50e6136 2121 fhp = tempfh;
1da177e4
LT		 2122 }
2123 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2124 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2125 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2126 aclsupport = (err == 0);
1da177e4 2127 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2128 if (err == -EOPNOTSUPP)
1da177e4 2129 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2130 else if (err == -EINVAL) {
1da177e4
LT		 2131 status = nfserr_attrnotsupp;
2132 goto out;
b8dd7b9a 2133 } else if (err != 0)
1da177e4
LT		 2134 goto out_nfserr;
2135 }
2136 }
1da177e4 2137
18032ca0
DQ		 2138#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2139 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2140 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2141 err = security_inode_getsecctx(dentry->d_inode,
2142 &context, &contextlen);
2143 contextsupport = (err == 0);
2144 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2145 if (err == -EOPNOTSUPP)
2146 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2147 else if (err)
2148 goto out_nfserr;
2149 }
2150 }
2151#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2152
2b44f1ba 2153 if (bmval2) {
ddd1ea56
BF		 2154 p = xdr_reserve_space(xdr, 16);
2155 if (!p)
2b44f1ba 2156 goto out_resource;
c373b0a4
BF		 2157 *p++ = cpu_to_be32(3);
2158 *p++ = cpu_to_be32(bmval0);
2159 *p++ = cpu_to_be32(bmval1);
2160 *p++ = cpu_to_be32(bmval2);
2b44f1ba 2161 } else if (bmval1) {
ddd1ea56
BF		 2162 p = xdr_reserve_space(xdr, 12);
2163 if (!p)
2b44f1ba 2164 goto out_resource;
c373b0a4
BF		 2165 *p++ = cpu_to_be32(2);
2166 *p++ = cpu_to_be32(bmval0);
2167 *p++ = cpu_to_be32(bmval1);
7e705706 2168 } else {
ddd1ea56
BF		 2169 p = xdr_reserve_space(xdr, 8);
2170 if (!p)
2b44f1ba 2171 goto out_resource;
c373b0a4
BF		 2172 *p++ = cpu_to_be32(1);
2173 *p++ = cpu_to_be32(bmval0);
7e705706 2174 }
082d4bd7
BF		 2175
2176 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2177 p = xdr_reserve_space(xdr, 4);
2178 if (!p)
2179 goto out_resource;
082d4bd7 2180 p++; /* to be backfilled later */
1da177e4
LT		 2181
2182 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2183 u32 word0 = nfsd_suppattrs0(minorversion);
2184 u32 word1 = nfsd_suppattrs1(minorversion);
2185 u32 word2 = nfsd_suppattrs2(minorversion);
2186
42ca0993
BF		 2187 if (!aclsupport)
2188 word0 &= ~FATTR4_WORD0_ACL;
18032ca0
DQ		 2189 if (!contextsupport)
2190 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
7e705706 2191 if (!word2) {
ddd1ea56
BF		 2192 p = xdr_reserve_space(xdr, 12);
2193 if (!p)
2b44f1ba 2194 goto out_resource;
c373b0a4
BF		 2195 *p++ = cpu_to_be32(2);
2196 *p++ = cpu_to_be32(word0);
2197 *p++ = cpu_to_be32(word1);
7e705706 2198 } else {
ddd1ea56
BF		 2199 p = xdr_reserve_space(xdr, 16);
2200 if (!p)
2b44f1ba 2201 goto out_resource;
c373b0a4
BF		 2202 *p++ = cpu_to_be32(3);
2203 *p++ = cpu_to_be32(word0);
2204 *p++ = cpu_to_be32(word1);
2205 *p++ = cpu_to_be32(word2);
7e705706 2206 }
1da177e4
LT		 2207 }
2208 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2209 p = xdr_reserve_space(xdr, 4);
2210 if (!p)
1da177e4 2211 goto out_resource;
3d2544b1 2212 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2213 if (dummy == NF4BAD) {
2214 status = nfserr_serverfault;
2215 goto out;
2216 }
c373b0a4 2217 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2218 }
2219 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2220 p = xdr_reserve_space(xdr, 4);
2221 if (!p)
1da177e4 2222 goto out_resource;
49640001 2223 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2224 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2225 else
c373b0a4
BF		 2226 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2227 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2228 }
2229 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2230 p = xdr_reserve_space(xdr, 8);
2231 if (!p)
1da177e4 2232 goto out_resource;
d05d5744 2233 p = encode_change(p, &stat, dentry->d_inode);
1da177e4
LT		 2234 }
2235 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2236 p = xdr_reserve_space(xdr, 8);
2237 if (!p)
1da177e4 2238 goto out_resource;
b64c7f3b 2239 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2240 }
2241 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2242 p = xdr_reserve_space(xdr, 4);
2243 if (!p)
1da177e4 2244 goto out_resource;
c373b0a4 2245 *p++ = cpu_to_be32(1);
1da177e4
LT		 2246 }
2247 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2248 p = xdr_reserve_space(xdr, 4);
2249 if (!p)
1da177e4 2250 goto out_resource;
c373b0a4 2251 *p++ = cpu_to_be32(1);
1da177e4
LT		 2252 }
2253 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2254 p = xdr_reserve_space(xdr, 4);
2255 if (!p)
1da177e4 2256 goto out_resource;
c373b0a4 2257 *p++ = cpu_to_be32(0);
1da177e4
LT		 2258 }
2259 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2260 p = xdr_reserve_space(xdr, 16);
2261 if (!p)
1da177e4 2262 goto out_resource;
42ca0993 2263 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 2264 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2265 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2266 } else switch(fsid_source(fhp)) {
2267 case FSIDSOURCE_FSID:
b64c7f3b
BF		 2268 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2269 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 2270 break;
2271 case FSIDSOURCE_DEV:
c373b0a4
BF		 2272 *p++ = cpu_to_be32(0);
2273 *p++ = cpu_to_be32(MAJOR(stat.dev));
2274 *p++ = cpu_to_be32(0);
2275 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 2276 break;
2277 case FSIDSOURCE_UUID:
94eb3689
KM		 2278 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2279 EX_UUID_LEN);
af6a4e28 2280 break;
1da177e4
LT		 2281 }
2282 }
2283 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2284 p = xdr_reserve_space(xdr, 4);
2285 if (!p)
1da177e4 2286 goto out_resource;
c373b0a4 2287 *p++ = cpu_to_be32(0);
1da177e4
LT		 2288 }
2289 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2290 p = xdr_reserve_space(xdr, 4);
2291 if (!p)
1da177e4 2292 goto out_resource;
c373b0a4 2293 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 2294 }
2295 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2296 p = xdr_reserve_space(xdr, 4);
2297 if (!p)
1da177e4 2298 goto out_resource;
c373b0a4 2299 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 2300 }
2301 if (bmval0 & FATTR4_WORD0_ACL) {
2302 struct nfs4_ace *ace;
1da177e4
LT		 2303
2304 if (acl == NULL) {
ddd1ea56
BF		 2305 p = xdr_reserve_space(xdr, 4);
2306 if (!p)
1da177e4
LT		 2307 goto out_resource;
2308
c373b0a4 2309 *p++ = cpu_to_be32(0);
1da177e4
LT		 2310 goto out_acl;
2311 }
ddd1ea56
BF		 2312 p = xdr_reserve_space(xdr, 4);
2313 if (!p)
1da177e4 2314 goto out_resource;
c373b0a4 2315 *p++ = cpu_to_be32(acl->naces);
1da177e4 2316
28e05dd8 2317 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2318 p = xdr_reserve_space(xdr, 4*3);
2319 if (!p)
1da177e4 2320 goto out_resource;
c373b0a4
BF		 2321 *p++ = cpu_to_be32(ace->type);
2322 *p++ = cpu_to_be32(ace->flag);
2323 *p++ = cpu_to_be32(ace->access_mask &
2324 NFS4_ACE_MASK_ALL);
ddd1ea56 2325 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2326 if (status)
2327 goto out;
2328 }
2329 }
2330out_acl:
2331 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2332 p = xdr_reserve_space(xdr, 4);
2333 if (!p)
1da177e4 2334 goto out_resource;
c373b0a4 2335 *p++ = cpu_to_be32(aclsupport ?
1da177e4
LT		 2336 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2337 }
2338 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2339 p = xdr_reserve_space(xdr, 4);
2340 if (!p)
1da177e4 2341 goto out_resource;
c373b0a4 2342 *p++ = cpu_to_be32(1);
1da177e4
LT		 2343 }
2344 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2345 p = xdr_reserve_space(xdr, 4);
2346 if (!p)
1da177e4 2347 goto out_resource;
c373b0a4 2348 *p++ = cpu_to_be32(0);
1da177e4
LT		 2349 }
2350 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2351 p = xdr_reserve_space(xdr, 4);
2352 if (!p)
1da177e4 2353 goto out_resource;
c373b0a4 2354 *p++ = cpu_to_be32(1);
1da177e4
LT		 2355 }
2356 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2357 p = xdr_reserve_space(xdr, 4);
2358 if (!p)
1da177e4 2359 goto out_resource;
c373b0a4 2360 *p++ = cpu_to_be32(1);
1da177e4
LT		 2361 }
2362 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2363 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2364 if (!p)
1da177e4 2365 goto out_resource;
0c0c267b
BF		 2366 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2367 fhp->fh_handle.fh_size);
1da177e4
LT		 2368 }
2369 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2370 p = xdr_reserve_space(xdr, 8);
2371 if (!p)
1da177e4 2372 goto out_resource;
b64c7f3b 2373 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 2374 }
2375 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2376 p = xdr_reserve_space(xdr, 8);
2377 if (!p)
1da177e4 2378 goto out_resource;
b64c7f3b 2379 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2380 }
2381 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2382 p = xdr_reserve_space(xdr, 8);
2383 if (!p)
1da177e4 2384 goto out_resource;
b64c7f3b 2385 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2386 }
2387 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2388 p = xdr_reserve_space(xdr, 8);
2389 if (!p)
1da177e4 2390 goto out_resource;
b64c7f3b 2391 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 2392 }
81c3f413 2393 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2394 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2395 if (status)
2396 goto out;
2397 }
1da177e4 2398 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2399 p = xdr_reserve_space(xdr, 4);
2400 if (!p)
1da177e4 2401 goto out_resource;
c373b0a4 2402 *p++ = cpu_to_be32(1);
1da177e4
LT		 2403 }
2404 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2405 p = xdr_reserve_space(xdr, 8);
2406 if (!p)
1da177e4 2407 goto out_resource;
b64c7f3b 2408 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2409 }
2410 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2411 p = xdr_reserve_space(xdr, 4);
2412 if (!p)
1da177e4 2413 goto out_resource;
c373b0a4 2414 *p++ = cpu_to_be32(255);
1da177e4
LT		 2415 }
2416 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2417 p = xdr_reserve_space(xdr, 4);
2418 if (!p)
1da177e4 2419 goto out_resource;
c373b0a4 2420 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 2421 }
2422 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2423 p = xdr_reserve_space(xdr, 8);
2424 if (!p)
1da177e4 2425 goto out_resource;
b64c7f3b 2426 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2427 }
2428 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2429 p = xdr_reserve_space(xdr, 8);
2430 if (!p)
1da177e4 2431 goto out_resource;
b64c7f3b 2432 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2433 }
2434 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2435 p = xdr_reserve_space(xdr, 4);
2436 if (!p)
1da177e4 2437 goto out_resource;
c373b0a4 2438 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 2439 }
2440 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2441 p = xdr_reserve_space(xdr, 4);
2442 if (!p)
1da177e4 2443 goto out_resource;
c373b0a4 2444 *p++ = cpu_to_be32(1);
1da177e4
LT		 2445 }
2446 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2447 p = xdr_reserve_space(xdr, 4);
2448 if (!p)
1da177e4 2449 goto out_resource;
c373b0a4 2450 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 2451 }
2452 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2453 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2454 if (status)
2455 goto out;
2456 }
2457 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2458 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2459 if (status)
2460 goto out;
2461 }
2462 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2463 p = xdr_reserve_space(xdr, 8);
2464 if (!p)
1da177e4 2465 goto out_resource;
c373b0a4
BF		 2466 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2467 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 2468 }
2469 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2470 p = xdr_reserve_space(xdr, 8);
2471 if (!p)
1da177e4
LT		 2472 goto out_resource;
2473 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 2474 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2475 }
2476 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2477 p = xdr_reserve_space(xdr, 8);
2478 if (!p)
1da177e4
LT		 2479 goto out_resource;
2480 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 2481 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2482 }
2483 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2484 p = xdr_reserve_space(xdr, 8);
2485 if (!p)
1da177e4
LT		 2486 goto out_resource;
2487 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 2488 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2489 }
2490 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2491 p = xdr_reserve_space(xdr, 8);
2492 if (!p)
1da177e4
LT		 2493 goto out_resource;
2494 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 2495 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2496 }
2497 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2498 p = xdr_reserve_space(xdr, 12);
2499 if (!p)
1da177e4 2500 goto out_resource;
b64c7f3b 2501 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 2502 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 2503 }
2504 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2505 p = xdr_reserve_space(xdr, 12);
2506 if (!p)
1da177e4 2507 goto out_resource;
c373b0a4
BF		 2508 *p++ = cpu_to_be32(0);
2509 *p++ = cpu_to_be32(1);
2510 *p++ = cpu_to_be32(0);
1da177e4
LT		 2511 }
2512 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2513 p = xdr_reserve_space(xdr, 12);
2514 if (!p)
1da177e4 2515 goto out_resource;
b64c7f3b 2516 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 2517 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 2518 }
2519 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2520 p = xdr_reserve_space(xdr, 12);
2521 if (!p)
1da177e4 2522 goto out_resource;
b64c7f3b 2523 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 2524 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 2525 }
2526 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
ddd1ea56
BF		 2527 p = xdr_reserve_space(xdr, 8);
2528 if (!p)
1da177e4 2529 goto out_resource;
406a7ea9
FF		 2530 /*
2531 * Get parent's attributes if not ignoring crossmount
2532 * and this is the root of a cross-mounted filesystem.
2533 */
2534 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2535 dentry == exp->ex_path.mnt->mnt_root)
2536 get_parent_attributes(exp, &stat);
b64c7f3b 2537 p = xdr_encode_hyper(p, stat.ino);
1da177e4 2538 }
18032ca0 2539 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
ddd1ea56
BF		 2540 status = nfsd4_encode_security_label(xdr, rqstp, context,
2541 contextlen);
18032ca0
DQ		 2542 if (status)
2543 goto out;
2544 }
8c18f205 2545 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
ddd1ea56
BF		 2546 p = xdr_reserve_space(xdr, 16);
2547 if (!p)
de3997a7 2548 goto out_resource;
c373b0a4
BF		 2549 *p++ = cpu_to_be32(3);
2550 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2551 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2552 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
8c18f205 2553 }
7e705706 2554
082d4bd7
BF		 2555 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2556 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2557 status = nfs_ok;
2558
2559out:
ba4e55bb 2560#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2561 if (context)
2562 security_release_secctx(context, contextlen);
ba4e55bb 2563#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2564 kfree(acl);
18df11d0 2565 if (tempfh) {
d50e6136 2566 fh_put(tempfh);
18df11d0
YZ		 2567 kfree(tempfh);
2568 }
1fcea5b2
BF		 2569 if (status)
2570 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2571 return status;
2572out_nfserr:
b8dd7b9a 2573 status = nfserrno(err);
1da177e4
LT		 2574 goto out;
2575out_resource:
1da177e4
LT		 2576 status = nfserr_resource;
2577 goto out;
1da177e4
LT		 2578}
2579
2825a7f9
BF		 2580static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2581 struct xdr_buf *buf, __be32 *p, int bytes)
2582{
2583 xdr->scratch.iov_len = 0;
2584 memset(buf, 0, sizeof(struct xdr_buf));
2585 buf->head[0].iov_base = p;
2586 buf->head[0].iov_len = 0;
2587 buf->len = 0;
2588 xdr->buf = buf;
2589 xdr->iov = buf->head;
2590 xdr->p = p;
2591 xdr->end = (void *)p + bytes;
2592 buf->buflen = bytes;
2593}
2594
d5184658
BF		 2595__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2596 struct svc_fh *fhp, struct svc_export *exp,
2597 struct dentry *dentry, u32 *bmval,
2598 struct svc_rqst *rqstp, int ignore_crossmnt)
2599{
2825a7f9 2600 struct xdr_buf dummy;
d5184658
BF		 2601 struct xdr_stream xdr;
2602 __be32 ret;
2603
2825a7f9 2604 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2605 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2606 ignore_crossmnt);
2607 *p = xdr.p;
2608 return ret;
2609}
2610
c0ce6ec8
BF		 2611static inline int attributes_need_mount(u32 *bmval)
2612{
2613 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2614 return 1;
2615 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2616 return 1;
2617 return 0;
2618}
2619
b37ad28b 2620static __be32
561f0ed4
BF		 2621nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2622 const char *name, int namlen)
1da177e4
LT		 2623{
2624 struct svc_export *exp = cd->rd_fhp->fh_export;
2625 struct dentry *dentry;
b37ad28b 2626 __be32 nfserr;
406a7ea9 2627 int ignore_crossmnt = 0;
1da177e4
LT		 2628
2629 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2630 if (IS_ERR(dentry))
2631 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2632 if (!dentry->d_inode) {
2633 /*
2634 * nfsd_buffered_readdir drops the i_mutex between
2635 * readdir and calling this callback, leaving a window
2636 * where this directory entry could have gone away.
2637 */
2638 dput(dentry);
2639 return nfserr_noent;
2640 }
1da177e4
LT		 2641
2642 exp_get(exp);
406a7ea9
FF		 2643 /*
2644 * In the case of a mountpoint, the client may be asking for
2645 * attributes that are only properties of the underlying filesystem
2646 * as opposed to the cross-mounted file system. In such a case,
2647 * we will not follow the cross mount and will fill the attribtutes
2648 * directly from the mountpoint dentry.
2649 */
3227fa41 2650 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2651 int err;
2652
3227fa41
BF		 2653 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2654 && !attributes_need_mount(cd->rd_bmval)) {
2655 ignore_crossmnt = 1;
2656 goto out_encode;
2657 }
dcb488a3
AA		 2658 /*
2659 * Why the heck aren't we just using nfsd_lookup??
2660 * Different "."/".." handling? Something else?
2661 * At least, add a comment here to explain....
2662 */
021d3a72
BF		 2663 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2664 if (err) {
2665 nfserr = nfserrno(err);
1da177e4
LT		 2666 goto out_put;
2667 }
dcb488a3
AA		 2668 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2669 if (nfserr)
2670 goto out_put;
1da177e4
LT		 2671
2672 }
3227fa41 2673out_encode:
561f0ed4 2674 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 2675 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2676out_put:
2677 dput(dentry);
2678 exp_put(exp);
2679 return nfserr;
2680}
2681
2ebbc012 2682static __be32 *
561f0ed4 2683nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 2684{
561f0ed4
BF		 2685 __be32 *p;
2686
c3a45617 2687 p = xdr_reserve_space(xdr, 20);
561f0ed4 2688 if (!p)
1da177e4
LT		 2689 return NULL;
2690 *p++ = htonl(2);
2691 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2692 *p++ = htonl(0); /* bmval1 */
2693
87915c64 2694 *p++ = htonl(4); /* attribute length */
1da177e4 2695 *p++ = nfserr; /* no htonl */
1da177e4
LT		 2696 return p;
2697}
2698
2699static int
a0ad13ef
N		 2700nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2701 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2702{
a0ad13ef 2703 struct readdir_cd *ccd = ccdv;
1da177e4 2704 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 2705 struct xdr_stream *xdr = cd->xdr;
2706 int start_offset = xdr->buf->len;
2707 int cookie_offset;
aee37764 2708 u32 name_and_cookie;
561f0ed4 2709 int entry_bytes;
b37ad28b 2710 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 2711 __be64 wire_offset;
2712 __be32 *p;
1da177e4
LT		 2713
2714 /* In nfsv4, "." and ".." never make it onto the wire.. */
2715 if (name && isdotent(name, namlen)) {
2716 cd->common.err = nfs_ok;
2717 return 0;
2718 }
2719
561f0ed4
BF		 2720 if (cd->cookie_offset) {
2721 wire_offset = cpu_to_be64(offset);
2722 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2723 &wire_offset, 8);
2724 }
1da177e4 2725
561f0ed4
BF		 2726 p = xdr_reserve_space(xdr, 4);
2727 if (!p)
1da177e4 2728 goto fail;
1da177e4 2729 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 2730 cookie_offset = xdr->buf->len;
2731 p = xdr_reserve_space(xdr, 3*4 + namlen);
2732 if (!p)
2733 goto fail;
1da177e4
LT		 2734 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2735 p = xdr_encode_array(p, name, namlen); /* name length & name */
2736
561f0ed4 2737 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 2738 switch (nfserr) {
2739 case nfs_ok:
1da177e4
LT		 2740 break;
2741 case nfserr_resource:
2742 nfserr = nfserr_toosmall;
2743 goto fail;
b2c0cea6 2744 case nfserr_noent:
f41c5ad2 2745 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 2746 goto skip_entry;
1da177e4
LT		 2747 default:
2748 /*
2749 * If the client requested the RDATTR_ERROR attribute,
2750 * we stuff the error code into this attribute
2751 * and continue. If this attribute was not requested,
2752 * then in accordance with the spec, we fail the
2753 * entire READDIR operation(!)
2754 */
2755 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2756 goto fail;
561f0ed4 2757 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 2758 if (p == NULL) {
2759 nfserr = nfserr_toosmall;
1da177e4 2760 goto fail;
34081efc 2761 }
1da177e4 2762 }
561f0ed4
BF		 2763 nfserr = nfserr_toosmall;
2764 entry_bytes = xdr->buf->len - start_offset;
2765 if (entry_bytes > cd->rd_maxcount)
2766 goto fail;
2767 cd->rd_maxcount -= entry_bytes;
3b299709
BF		 2768 if (!cd->rd_dircount)
2769 goto fail;
aee37764
BF		 2770 /*
2771 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
2772 * let's always let through the first entry, at least:
2773 */
2774 name_and_cookie = 4 * XDR_QUADLEN(namlen) + 8;
2775 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
2776 goto fail;
2777 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
561f0ed4 2778 cd->cookie_offset = cookie_offset;
b2c0cea6 2779skip_entry:
1da177e4
LT		 2780 cd->common.err = nfs_ok;
2781 return 0;
2782fail:
561f0ed4 2783 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 2784 cd->common.err = nfserr;
2785 return -EINVAL;
2786}
2787
d0a381dd
BF		 2788static __be32
2789nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 2790{
bc749ca4 2791 __be32 *p;
e2f282b9 2792
d0a381dd
BF		 2793 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2794 if (!p)
2795 return nfserr_resource;
c373b0a4 2796 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 2797 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
2798 sizeof(stateid_opaque_t));
d0a381dd 2799 return 0;
e2f282b9
BH		 2800}
2801
695e12f8 2802static __be32
b37ad28b 2803nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2804{
d0a381dd 2805 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2806 __be32 *p;
1da177e4
LT		 2807
2808 if (!nfserr) {
d0a381dd
BF		 2809 p = xdr_reserve_space(xdr, 8);
2810 if (!p)
2811 return nfserr_resource;
c373b0a4
BF		 2812 *p++ = cpu_to_be32(access->ac_supported);
2813 *p++ = cpu_to_be32(access->ac_resp_access);
1da177e4 2814 }
695e12f8 2815 return nfserr;
1da177e4
LT		 2816}
2817
1d1bc8f2
BF		 2818static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2819{
d0a381dd 2820 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 2821 __be32 *p;
2822
2823 if (!nfserr) {
d0a381dd
BF		 2824 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2825 if (!p)
2826 return nfserr_resource;
0c0c267b
BF		 2827 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
2828 NFS4_MAX_SESSIONID_LEN);
c373b0a4 2829 *p++ = cpu_to_be32(bcts->dir);
6e67b5d1 2830 /* Sorry, we do not yet support RDMA over 4.1: */
c373b0a4 2831 *p++ = cpu_to_be32(0);
1d1bc8f2
BF		 2832 }
2833 return nfserr;
2834}
2835
695e12f8 2836static __be32
b37ad28b 2837nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 2838{
d0a381dd
BF		 2839 struct xdr_stream *xdr = &resp->xdr;
2840
e2f282b9 2841 if (!nfserr)
d0a381dd 2842 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
e2f282b9 2843
695e12f8 2844 return nfserr;
1da177e4
LT		 2845}
2846
2847
695e12f8 2848static __be32
b37ad28b 2849nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2850{
d0a381dd 2851 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2852 __be32 *p;
1da177e4
LT		 2853
2854 if (!nfserr) {
d0a381dd
BF		 2855 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
2856 if (!p)
2857 return nfserr_resource;
0c0c267b
BF		 2858 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
2859 NFS4_VERIFIER_SIZE);
1da177e4 2860 }
695e12f8 2861 return nfserr;
1da177e4
LT		 2862}
2863
695e12f8 2864static __be32
b37ad28b 2865nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2866{
d0a381dd 2867 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2868 __be32 *p;
1da177e4
LT		 2869
2870 if (!nfserr) {
d0a381dd
BF		 2871 p = xdr_reserve_space(xdr, 32);
2872 if (!p)
2873 return nfserr_resource;
d05d5744 2874 p = encode_cinfo(p, &create->cr_cinfo);
c373b0a4
BF		 2875 *p++ = cpu_to_be32(2);
2876 *p++ = cpu_to_be32(create->cr_bmval[0]);
2877 *p++ = cpu_to_be32(create->cr_bmval[1]);
1da177e4 2878 }
695e12f8 2879 return nfserr;
1da177e4
LT		 2880}
2881
b37ad28b
AV		 2882static __be32
2883nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2884{
2885 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 2886 struct xdr_stream *xdr = &resp->xdr;
1da177e4
LT		 2887
2888 if (nfserr)
2889 return nfserr;
2890
d5184658
BF		 2891 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2892 getattr->ga_bmval,
406a7ea9 2893 resp->rqstp, 0);
1da177e4
LT		 2894 return nfserr;
2895}
2896
695e12f8
BH		 2897static __be32
2898nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2899{
d0a381dd 2900 struct xdr_stream *xdr = &resp->xdr;
695e12f8 2901 struct svc_fh *fhp = *fhpp;
1da177e4 2902 unsigned int len;
bc749ca4 2903 __be32 *p;
1da177e4
LT		 2904
2905 if (!nfserr) {
2906 len = fhp->fh_handle.fh_size;
d0a381dd
BF		 2907 p = xdr_reserve_space(xdr, len + 4);
2908 if (!p)
2909 return nfserr_resource;
0c0c267b 2910 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
1da177e4 2911 }
695e12f8 2912 return nfserr;
1da177e4
LT		 2913}
2914
2915/*
2916* Including all fields other than the name, a LOCK4denied structure requires
2917* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2918*/
d0a381dd
BF		 2919static __be32
2920nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 2921{
7c13f344 2922 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2923 __be32 *p;
1da177e4 2924
8c7424cf 2925again:
d0a381dd 2926 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 2927 if (!p) {
2928 /*
2929 * Don't fail to return the result just because we can't
2930 * return the conflicting open:
2931 */
2932 if (conf->len) {
f98bac5a 2933 kfree(conf->data);
8c7424cf
BF		 2934 conf->len = 0;
2935 conf->data = NULL;
2936 goto again;
2937 }
d0a381dd 2938 return nfserr_resource;
8c7424cf 2939 }
b64c7f3b
BF		 2940 p = xdr_encode_hyper(p, ld->ld_start);
2941 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 2942 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 2943 if (conf->len) {
0c0c267b
BF		 2944 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
2945 p = xdr_encode_opaque(p, conf->data, conf->len);
f98bac5a 2946 kfree(conf->data);
1da177e4 2947 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 2948 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 2949 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 2950 }
d0a381dd 2951 return nfserr_denied;
1da177e4
LT		 2952}
2953
695e12f8 2954static __be32
b37ad28b 2955nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2956{
d0a381dd
BF		 2957 struct xdr_stream *xdr = &resp->xdr;
2958
e2f282b9 2959 if (!nfserr)
d0a381dd 2960 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 2961 else if (nfserr == nfserr_denied)
d0a381dd 2962 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
f98bac5a 2963
695e12f8 2964 return nfserr;
1da177e4
LT		 2965}
2966
695e12f8 2967static __be32
b37ad28b 2968nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 2969{
d0a381dd
BF		 2970 struct xdr_stream *xdr = &resp->xdr;
2971
1da177e4 2972 if (nfserr == nfserr_denied)
d0a381dd 2973 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 2974 return nfserr;
1da177e4
LT		 2975}
2976
695e12f8 2977static __be32
b37ad28b 2978nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 2979{
d0a381dd
BF		 2980 struct xdr_stream *xdr = &resp->xdr;
2981
e2f282b9 2982 if (!nfserr)
d0a381dd 2983 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
e2f282b9 2984
695e12f8 2985 return nfserr;
1da177e4
LT		 2986}
2987
2988
695e12f8 2989static __be32
b37ad28b 2990nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2991{
d0a381dd 2992 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2993 __be32 *p;
1da177e4
LT		 2994
2995 if (!nfserr) {
d0a381dd
BF		 2996 p = xdr_reserve_space(xdr, 20);
2997 if (!p)
2998 return nfserr_resource;
d05d5744 2999 p = encode_cinfo(p, &link->li_cinfo);
1da177e4 3000 }
695e12f8 3001 return nfserr;
1da177e4
LT		 3002}
3003
3004
695e12f8 3005static __be32
b37ad28b 3006nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 3007{
d0a381dd 3008 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3009 __be32 *p;
1da177e4
LT		 3010
3011 if (nfserr)
3012 goto out;
3013
d0a381dd
BF		 3014 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3015 if (nfserr)
3016 goto out;
3017 p = xdr_reserve_space(xdr, 40);
3018 if (!p)
3019 return nfserr_resource;
d05d5744 3020 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4
BF		 3021 *p++ = cpu_to_be32(open->op_rflags);
3022 *p++ = cpu_to_be32(2);
3023 *p++ = cpu_to_be32(open->op_bmval[0]);
3024 *p++ = cpu_to_be32(open->op_bmval[1]);
3025 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 3026
3027 switch (open->op_delegate_type) {
3028 case NFS4_OPEN_DELEGATE_NONE:
3029 break;
3030 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 3031 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3032 if (nfserr)
3033 return nfserr;
3034 p = xdr_reserve_space(xdr, 20);
3035 if (!p)
3036 return nfserr_resource;
c373b0a4 3037 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 3038
3039 /*
3040 * TODO: ACE's in delegations
3041 */
c373b0a4
BF		 3042 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3043 *p++ = cpu_to_be32(0);
3044 *p++ = cpu_to_be32(0);
3045 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 3046 break;
3047 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 3048 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3049 if (nfserr)
3050 return nfserr;
3051 p = xdr_reserve_space(xdr, 32);
3052 if (!p)
3053 return nfserr_resource;
c373b0a4 3054 *p++ = cpu_to_be32(0);
1da177e4
LT		 3055
3056 /*
3057 * TODO: space_limit's in delegations
3058 */
c373b0a4
BF		 3059 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3060 *p++ = cpu_to_be32(~(u32)0);
3061 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3062
3063 /*
3064 * TODO: ACE's in delegations
3065 */
c373b0a4
BF		 3066 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3067 *p++ = cpu_to_be32(0);
3068 *p++ = cpu_to_be32(0);
3069 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3070 break;
d24433cd
BH		 3071 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3072 switch (open->op_why_no_deleg) {
3073 case WND4_CONTENTION:
3074 case WND4_RESOURCE:
d0a381dd
BF		 3075 p = xdr_reserve_space(xdr, 8);
3076 if (!p)
3077 return nfserr_resource;
c373b0a4
BF		 3078 *p++ = cpu_to_be32(open->op_why_no_deleg);
3079 /* deleg signaling not supported yet: */
3080 *p++ = cpu_to_be32(0);
d24433cd
BH		 3081 break;
3082 default:
d0a381dd
BF		 3083 p = xdr_reserve_space(xdr, 4);
3084 if (!p)
3085 return nfserr_resource;
c373b0a4 3086 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3087 }
d24433cd 3088 break;
1da177e4
LT		 3089 default:
3090 BUG();
3091 }
3092 /* XXX save filehandle here */
3093out:
695e12f8 3094 return nfserr;
1da177e4
LT		 3095}
3096
695e12f8 3097static __be32
b37ad28b 3098nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3099{
d0a381dd
BF		 3100 struct xdr_stream *xdr = &resp->xdr;
3101
e2f282b9 3102 if (!nfserr)
d0a381dd 3103 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4 3104
695e12f8 3105 return nfserr;
1da177e4
LT		 3106}
3107
695e12f8 3108static __be32
b37ad28b 3109nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3110{
d0a381dd
BF		 3111 struct xdr_stream *xdr = &resp->xdr;
3112
e2f282b9 3113 if (!nfserr)
d0a381dd 3114 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4 3115
695e12f8 3116 return nfserr;
1da177e4
LT		 3117}
3118
dc97618d
BF		 3119static __be32 nfsd4_encode_splice_read(
3120 struct nfsd4_compoundres *resp,
3121 struct nfsd4_read *read,
3122 struct file *file, unsigned long maxcount)
1da177e4 3123{
ddd1ea56 3124 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3125 struct xdr_buf *buf = xdr->buf;
dc97618d 3126 u32 eof;
30596768 3127 int space_left;
dc97618d 3128 __be32 nfserr;
fec25fa4 3129 __be32 *p = xdr->p - 2;
1da177e4 3130
d5d5c304
KM		 3131 /* Make sure there will be room for padding if needed */
3132 if (xdr->end - xdr->p < 1)
d0a381dd 3133 return nfserr_resource;
dc97618d
BF		 3134
3135 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3136 read->rd_offset, &maxcount);
3137 if (nfserr) {
3138 /*
3139 * nfsd_splice_actor may have already messed with the
3140 * page length; reset it so as not to confuse
3141 * xdr_truncate_encode:
3142 */
34a78b48 3143 buf->page_len = 0;
dc97618d 3144 return nfserr;
b0e35fda 3145 }
1da177e4 3146
dc97618d
BF		 3147 eof = (read->rd_offset + maxcount >=
3148 read->rd_fhp->fh_dentry->d_inode->i_size);
4e21ac4b 3149
fec25fa4
BF		 3150 *(p++) = htonl(eof);
3151 *(p++) = htonl(maxcount);
dc97618d 3152
34a78b48
BF		 3153 buf->page_len = maxcount;
3154 buf->len += maxcount;
15b23ef5
BF		 3155 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3156 / PAGE_SIZE;
dc97618d
BF		 3157
3158 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3159 buf->tail[0].iov_base = xdr->p;
3160 buf->tail[0].iov_len = 0;
fec25fa4 3161 xdr->iov = buf->tail;
dc97618d 3162 if (maxcount&3) {
fec25fa4
BF		 3163 int pad = 4 - (maxcount&3);
3164
3165 *(xdr->p++) = 0;
3166
34a78b48 3167 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3168 buf->tail[0].iov_len = pad;
3169 buf->len += pad;
b0e35fda 3170 }
2825a7f9 3171
dc97618d 3172 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3173 buf->buflen - buf->len);
3174 buf->buflen = buf->len + space_left;
dc97618d
BF		 3175 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3176
3177 return 0;
3178}
3179
3180static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3181 struct nfsd4_read *read,
3182 struct file *file, unsigned long maxcount)
3183{
3184 struct xdr_stream *xdr = &resp->xdr;
3185 u32 eof;
3186 int v;
dc97618d 3187 int starting_len = xdr->buf->len - 8;
dc97618d 3188 long len;
b0420980 3189 int thislen;
dc97618d
BF		 3190 __be32 nfserr;
3191 __be32 tmp;
3192 __be32 *p;
b0420980
BF		 3193 u32 zzz = 0;
3194 int pad;
1da177e4
LT		 3195
3196 len = maxcount;
3197 v = 0;
6ff9897d 3198
1055414f 3199 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
b0420980
BF		 3200 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3201 WARN_ON_ONCE(!p);
3202 resp->rqstp->rq_vec[v].iov_base = p;
3203 resp->rqstp->rq_vec[v].iov_len = thislen;
3204 v++;
3205 len -= thislen;
3206
3207 while (len) {
6ff9897d 3208 thislen = min_t(long, len, PAGE_SIZE);
b0420980
BF		 3209 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3210 WARN_ON_ONCE(!p);
3211 resp->rqstp->rq_vec[v].iov_base = p;
6ff9897d 3212 resp->rqstp->rq_vec[v].iov_len = thislen;
1da177e4 3213 v++;
6ff9897d 3214 len -= thislen;
1da177e4
LT		 3215 }
3216 read->rd_vlen = v;
3217
dc97618d
BF		 3218 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3219 read->rd_vlen, &maxcount);
3220 if (nfserr)
1da177e4 3221 return nfserr;
b0420980 3222 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
dc97618d 3223
44524359
N		 3224 eof = (read->rd_offset + maxcount >=
3225 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4 3226
dc97618d
BF		 3227 tmp = htonl(eof);
3228 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3229 tmp = htonl(maxcount);
3230 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3231
b0420980
BF		 3232 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3233 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3234 &zzz, pad);
1da177e4 3235 return 0;
dc97618d
BF		 3236
3237}
3238
3239static __be32
3240nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3241 struct nfsd4_read *read)
3242{
3243 unsigned long maxcount;
3244 struct xdr_stream *xdr = &resp->xdr;
3245 struct file *file = read->rd_filp;
3246 int starting_len = xdr->buf->len;
3247 struct raparms *ra;
3248 __be32 *p;
3249 __be32 err;
3250
3251 if (nfserr)
3252 return nfserr;
3253
3254 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3255 if (!p) {
779fb0f3 3256 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
dc97618d
BF		 3257 return nfserr_resource;
3258 }
779fb0f3 3259 if (resp->xdr.buf->page_len && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
b0420980 3260 WARN_ON_ONCE(1);
dc97618d
BF		 3261 return nfserr_resource;
3262 }
dc97618d
BF		 3263 xdr_commit_encode(xdr);
3264
3265 maxcount = svc_max_payload(resp->rqstp);
3c7aa15d
KM		 3266 maxcount = min_t(unsigned long, maxcount, (xdr->buf->buflen - xdr->buf->len));
3267 maxcount = min_t(unsigned long, maxcount, read->rd_length);
dc97618d
BF		 3268
3269 if (!read->rd_filp) {
3270 err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
3271 &file, &ra);
3272 if (err)
3273 goto err_truncate;
3274 }
3275
779fb0f3 3276 if (file->f_op->splice_read && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
dc97618d
BF		 3277 err = nfsd4_encode_splice_read(resp, read, file, maxcount);
3278 else
3279 err = nfsd4_encode_readv(resp, read, file, maxcount);
3280
3281 if (!read->rd_filp)
3282 nfsd_put_tmp_read_open(file, ra);
3283
3284err_truncate:
3285 if (err)
3286 xdr_truncate_encode(xdr, starting_len);
3287 return err;
1da177e4
LT		 3288}
3289
b37ad28b
AV		 3290static __be32
3291nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3292{
3293 int maxcount;
476a7b1f
BF		 3294 __be32 wire_count;
3295 int zero = 0;
ddd1ea56 3296 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3297 int length_offset = xdr->buf->len;
bc749ca4 3298 __be32 *p;
1da177e4
LT		 3299
3300 if (nfserr)
3301 return nfserr;
2825a7f9
BF		 3302
3303 p = xdr_reserve_space(xdr, 4);
3304 if (!p)
3305 return nfserr_resource;
1da177e4 3306 maxcount = PAGE_SIZE;
d0a381dd 3307
476a7b1f
BF		 3308 p = xdr_reserve_space(xdr, maxcount);
3309 if (!p)
4e21ac4b 3310 return nfserr_resource;
1da177e4
LT		 3311 /*
3312 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3313 * if they would overflow the buffer. Is this kosher in NFSv4? If
3314 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3315 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3316 */
476a7b1f
BF		 3317 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3318 (char *)p, &maxcount);
1da177e4 3319 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3320 nfserr = nfserr_inval;
3321 if (nfserr) {
1fcea5b2 3322 xdr_truncate_encode(xdr, length_offset);
1da177e4 3323 return nfserr;
d3f627c8 3324 }
1da177e4 3325
476a7b1f
BF		 3326 wire_count = htonl(maxcount);
3327 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
69bbd9c7 3328 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
476a7b1f
BF		 3329 if (maxcount & 3)
3330 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3331 &zero, 4 - (maxcount&3));
1da177e4
LT		 3332 return 0;
3333}
3334
b37ad28b
AV		 3335static __be32
3336nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3337{
3338 int maxcount;
561f0ed4 3339 int bytes_left;
1da177e4 3340 loff_t offset;
561f0ed4 3341 __be64 wire_offset;
ddd1ea56 3342 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3343 int starting_len = xdr->buf->len;
bc749ca4 3344 __be32 *p;
1da177e4
LT		 3345
3346 if (nfserr)
3347 return nfserr;
1da177e4 3348
d0a381dd
BF		 3349 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3350 if (!p)
3351 return nfserr_resource;
1da177e4
LT		 3352
3353 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 3354 *p++ = cpu_to_be32(0);
3355 *p++ = cpu_to_be32(0);
4aea24b2
BF		 3356 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3357 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3358
3359 /*
561f0ed4
BF		 3360 * Number of bytes left for directory entries allowing for the
3361 * final 8 bytes of the readdir and a following failed op:
3362 */
3363 bytes_left = xdr->buf->buflen - xdr->buf->len
3364 - COMPOUND_ERR_SLACK_SPACE - 8;
3365 if (bytes_left < 0) {
3366 nfserr = nfserr_resource;
3367 goto err_no_verf;
3368 }
3369 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3370 /*
3371 * Note the rfc defines rd_maxcount as the size of the
3372 * READDIR4resok structure, which includes the verifier above
3373 * and the 8 bytes encoded at the end of this function:
1da177e4 3374 */
561f0ed4
BF		 3375 if (maxcount < 16) {
3376 nfserr = nfserr_toosmall;
1da177e4
LT		 3377 goto err_no_verf;
3378 }
561f0ed4 3379 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3380
aee37764
BF		 3381 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3382 if (!readdir->rd_dircount)
3383 readdir->rd_dircount = INT_MAX;
3384
561f0ed4
BF		 3385 readdir->xdr = xdr;
3386 readdir->rd_maxcount = maxcount;
1da177e4 3387 readdir->common.err = 0;
561f0ed4 3388 readdir->cookie_offset = 0;
1da177e4
LT		 3389
3390 offset = readdir->rd_cookie;
3391 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3392 &offset,
3393 &readdir->common, nfsd4_encode_dirent);
3394 if (nfserr == nfs_ok &&
3395 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3396 xdr->buf->len == starting_len + 8) {
3397 /* nothing encoded; which limit did we hit?: */
3398 if (maxcount - 16 < bytes_left)
3399 /* It was the fault of rd_maxcount: */
3400 nfserr = nfserr_toosmall;
3401 else
3402 /* We ran out of buffer space: */
3403 nfserr = nfserr_resource;
3404 }
1da177e4
LT		 3405 if (nfserr)
3406 goto err_no_verf;
3407
561f0ed4
BF		 3408 if (readdir->cookie_offset) {
3409 wire_offset = cpu_to_be64(offset);
3410 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3411 &wire_offset, 8);
3412 }
1da177e4 3413
561f0ed4
BF		 3414 p = xdr_reserve_space(xdr, 8);
3415 if (!p) {
3416 WARN_ON_ONCE(1);
3417 goto err_no_verf;
3418 }
1da177e4
LT		 3419 *p++ = 0; /* no more entries */
3420 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3421
3422 return 0;
3423err_no_verf:
1fcea5b2 3424 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3425 return nfserr;
3426}
3427
695e12f8 3428static __be32
b37ad28b 3429nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3430{
d0a381dd 3431 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3432 __be32 *p;
1da177e4
LT		 3433
3434 if (!nfserr) {
d0a381dd
BF		 3435 p = xdr_reserve_space(xdr, 20);
3436 if (!p)
3437 return nfserr_resource;
d05d5744 3438 p = encode_cinfo(p, &remove->rm_cinfo);
1da177e4 3439 }
695e12f8 3440 return nfserr;
1da177e4
LT		 3441}
3442
695e12f8 3443static __be32
b37ad28b 3444nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3445{
d0a381dd 3446 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3447 __be32 *p;
1da177e4
LT		 3448
3449 if (!nfserr) {
d0a381dd
BF		 3450 p = xdr_reserve_space(xdr, 40);
3451 if (!p)
3452 return nfserr_resource;
d05d5744
BF		 3453 p = encode_cinfo(p, &rename->rn_sinfo);
3454 p = encode_cinfo(p, &rename->rn_tinfo);
1da177e4 3455 }
695e12f8 3456 return nfserr;
1da177e4
LT		 3457}
3458
695e12f8 3459static __be32
d0a381dd 3460nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
a77c806f 3461 __be32 nfserr, struct svc_export *exp)
dcb488a3 3462{
676e4ebd 3463 u32 i, nflavs, supported;
4796f457
BF		 3464 struct exp_flavor_info *flavs;
3465 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3466 __be32 *p, *flavorsp;
3467 static bool report = true;
dcb488a3
AA		 3468
3469 if (nfserr)
3470 goto out;
d0a381dd 3471 nfserr = nfserr_resource;
4796f457
BF		 3472 if (exp->ex_nflavors) {
3473 flavs = exp->ex_flavors;
3474 nflavs = exp->ex_nflavors;
3475 } else { /* Handling of some defaults in absence of real secinfo: */
3476 flavs = def_flavs;
3477 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3478 nflavs = 2;
3479 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3480 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3481 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3482 nflavs = 1;
3483 flavs[0].pseudoflavor
3484 = svcauth_gss_flavor(exp->ex_client);
3485 } else {
3486 nflavs = 1;
3487 flavs[0].pseudoflavor
3488 = exp->ex_client->flavour->flavour;
3489 }
3490 }
3491
676e4ebd 3492 supported = 0;
d0a381dd
BF		 3493 p = xdr_reserve_space(xdr, 4);
3494 if (!p)
3495 goto out;
676e4ebd 3496 flavorsp = p++; /* to be backfilled later */
676e4ebd 3497
4796f457 3498 for (i = 0; i < nflavs; i++) {
676e4ebd 3499 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3500 struct rpcsec_gss_info info;
dcb488a3 3501
676e4ebd
CL		 3502 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3503 supported++;
d0a381dd
BF		 3504 p = xdr_reserve_space(xdr, 4 + 4 +
3505 XDR_LEN(info.oid.len) + 4 + 4);
3506 if (!p)
3507 goto out;
c373b0a4 3508 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 3509 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 3510 *p++ = cpu_to_be32(info.qop);
3511 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 3512 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3513 supported++;
d0a381dd
BF		 3514 p = xdr_reserve_space(xdr, 4);
3515 if (!p)
3516 goto out;
c373b0a4 3517 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 3518 } else {
3519 if (report)
3520 pr_warn("NFS: SECINFO: security flavor %u "
3521 "is not supported\n", pf);
dcb488a3
AA		 3522 }
3523 }
a77c806f 3524
676e4ebd
CL		 3525 if (nflavs != supported)
3526 report = false;
3527 *flavorsp = htonl(supported);
d0a381dd 3528 nfserr = 0;
dcb488a3
AA		 3529out:
3530 if (exp)
3531 exp_put(exp);
695e12f8 3532 return nfserr;
dcb488a3
AA		 3533}
3534
22b6dee8
MJ		 3535static __be32
3536nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3537 struct nfsd4_secinfo *secinfo)
3538{
d0a381dd
BF		 3539 struct xdr_stream *xdr = &resp->xdr;
3540
3541 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
22b6dee8
MJ		 3542}
3543
3544static __be32
3545nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3546 struct nfsd4_secinfo_no_name *secinfo)
3547{
d0a381dd
BF		 3548 struct xdr_stream *xdr = &resp->xdr;
3549
3550 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
22b6dee8
MJ		 3551}
3552
1da177e4
LT		 3553/*
3554 * The SETATTR encode routine is special -- it always encodes a bitmap,
3555 * regardless of the error status.
3556 */
695e12f8 3557static __be32
b37ad28b 3558nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3559{
d0a381dd 3560 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3561 __be32 *p;
1da177e4 3562
d0a381dd
BF		 3563 p = xdr_reserve_space(xdr, 16);
3564 if (!p)
3565 return nfserr_resource;
1da177e4 3566 if (nfserr) {
c373b0a4
BF		 3567 *p++ = cpu_to_be32(3);
3568 *p++ = cpu_to_be32(0);
3569 *p++ = cpu_to_be32(0);
3570 *p++ = cpu_to_be32(0);
1da177e4
LT		 3571 }
3572 else {
c373b0a4
BF		 3573 *p++ = cpu_to_be32(3);
3574 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3575 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3576 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 3577 }
695e12f8 3578 return nfserr;
1da177e4
LT		 3579}
3580
695e12f8 3581static __be32
b37ad28b 3582nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3583{
d0a381dd 3584 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3585 __be32 *p;
1da177e4
LT		 3586
3587 if (!nfserr) {
d0a381dd
BF		 3588 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3589 if (!p)
3590 return nfserr_resource;
0c0c267b
BF		 3591 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3592 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3593 NFS4_VERIFIER_SIZE);
1da177e4
LT		 3594 }
3595 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3596 p = xdr_reserve_space(xdr, 8);
3597 if (!p)
3598 return nfserr_resource;
c373b0a4
BF		 3599 *p++ = cpu_to_be32(0);
3600 *p++ = cpu_to_be32(0);
1da177e4 3601 }
695e12f8 3602 return nfserr;
1da177e4
LT		 3603}
3604
695e12f8 3605static __be32
b37ad28b 3606nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3607{
d0a381dd 3608 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3609 __be32 *p;
1da177e4
LT		 3610
3611 if (!nfserr) {
d0a381dd
BF		 3612 p = xdr_reserve_space(xdr, 16);
3613 if (!p)
3614 return nfserr_resource;
c373b0a4
BF		 3615 *p++ = cpu_to_be32(write->wr_bytes_written);
3616 *p++ = cpu_to_be32(write->wr_how_written);
0c0c267b
BF		 3617 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3618 NFS4_VERIFIER_SIZE);
1da177e4 3619 }
695e12f8 3620 return nfserr;
1da177e4
LT		 3621}
3622
57266a6e
BF		 3623static const u32 nfs4_minimal_spo_must_enforce[2] = {
3624 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3625 1 << (OP_EXCHANGE_ID - 32) |
3626 1 << (OP_CREATE_SESSION - 32) |
3627 1 << (OP_DESTROY_SESSION - 32) |
3628 1 << (OP_DESTROY_CLIENTID - 32)
3629};
3630
2db134eb 3631static __be32
57b7b43b 3632nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3633 struct nfsd4_exchange_id *exid)
3634{
d0a381dd 3635 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3636 __be32 *p;
0733d213
AA		 3637 char *major_id;
3638 char *server_scope;
3639 int major_id_sz;
3640 int server_scope_sz;
3641 uint64_t minor_id = 0;
3642
3643 if (nfserr)
3644 return nfserr;
3645
3646 major_id = utsname()->nodename;
3647 major_id_sz = strlen(major_id);
3648 server_scope = utsname()->nodename;
3649 server_scope_sz = strlen(server_scope);
3650
d0a381dd 3651 p = xdr_reserve_space(xdr,
0733d213
AA		 3652 8 /* eir_clientid */ +
3653 4 /* eir_sequenceid */ +
3654 4 /* eir_flags */ +
a8bb84bc 3655 4 /* spr_how */);
d0a381dd
BF		 3656 if (!p)
3657 return nfserr_resource;
0733d213 3658
0c0c267b 3659 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 3660 *p++ = cpu_to_be32(exid->seqid);
3661 *p++ = cpu_to_be32(exid->flags);
0733d213 3662
c373b0a4 3663 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 3664
57266a6e
BF		 3665 switch (exid->spa_how) {
3666 case SP4_NONE:
3667 break;
3668 case SP4_MACH_CRED:
a8bb84bc 3669 /* spo_must_enforce, spo_must_allow */
d0a381dd
BF		 3670 p = xdr_reserve_space(xdr, 16);
3671 if (!p)
3672 return nfserr_resource;
a8bb84bc 3673
57266a6e 3674 /* spo_must_enforce bitmap: */
c373b0a4
BF		 3675 *p++ = cpu_to_be32(2);
3676 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3677 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
57266a6e 3678 /* empty spo_must_allow bitmap: */
c373b0a4 3679 *p++ = cpu_to_be32(0);
a8bb84bc 3680
57266a6e
BF		 3681 break;
3682 default:
3683 WARN_ON_ONCE(1);
3684 }
0733d213 3685
d0a381dd 3686 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3687 8 /* so_minor_id */ +
3688 4 /* so_major_id.len */ +
3689 (XDR_QUADLEN(major_id_sz) * 4) +
3690 4 /* eir_server_scope.len */ +
3691 (XDR_QUADLEN(server_scope_sz) * 4) +
3692 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3693 if (!p)
3694 return nfserr_resource;
a8bb84bc 3695
0733d213 3696 /* The server_owner struct */
b64c7f3b 3697 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 3698 /* major id */
0c0c267b 3699 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 3700
3701 /* Server scope */
0c0c267b 3702 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 3703
3704 /* Implementation id */
c373b0a4 3705 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 3706 return 0;
2db134eb
AA		 3707}
3708
3709static __be32
57b7b43b 3710nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3711 struct nfsd4_create_session *sess)
3712{
d0a381dd 3713 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3714 __be32 *p;
ec6b5d7b
AA		 3715
3716 if (nfserr)
3717 return nfserr;
3718
d0a381dd
BF		 3719 p = xdr_reserve_space(xdr, 24);
3720 if (!p)
3721 return nfserr_resource;
0c0c267b
BF		 3722 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3723 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3724 *p++ = cpu_to_be32(sess->seqid);
3725 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 3726
d0a381dd
BF		 3727 p = xdr_reserve_space(xdr, 28);
3728 if (!p)
3729 return nfserr_resource;
c373b0a4
BF		 3730 *p++ = cpu_to_be32(0); /* headerpadsz */
3731 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3732 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3733 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3734 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3735 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3736 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3737
3738 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 3739 p = xdr_reserve_space(xdr, 4);
3740 if (!p)
3741 return nfserr_resource;
c373b0a4 3742 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 3743 }
3744
d0a381dd
BF		 3745 p = xdr_reserve_space(xdr, 28);
3746 if (!p)
3747 return nfserr_resource;
c373b0a4
BF		 3748 *p++ = cpu_to_be32(0); /* headerpadsz */
3749 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3750 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3751 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3752 *p++ = cpu_to_be32(sess->back_channel.maxops);
3753 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3754 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3755
3756 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 3757 p = xdr_reserve_space(xdr, 4);
3758 if (!p)
3759 return nfserr_resource;
c373b0a4 3760 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 3761 }
3762 return 0;
2db134eb
AA		 3763}
3764
c47d832b 3765static __be32
57b7b43b 3766nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3767 struct nfsd4_sequence *seq)
3768{
d0a381dd 3769 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3770 __be32 *p;
b85d4c01
BH		 3771
3772 if (nfserr)
3773 return nfserr;
3774
d0a381dd
BF		 3775 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3776 if (!p)
3777 return nfserr_resource;
0c0c267b
BF		 3778 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
3779 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3780 *p++ = cpu_to_be32(seq->seqid);
3781 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 3782 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 3783 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
3784 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
3785 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 3786
f5236013 3787 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 3788 return 0;
2db134eb
AA		 3789}
3790
2355c596 3791static __be32
57b7b43b 3792nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3793 struct nfsd4_test_stateid *test_stateid)
3794{
d0a381dd 3795 struct xdr_stream *xdr = &resp->xdr;
03cfb420 3796 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3797 __be32 *p;
17456804 3798
a11fcce1
BF		 3799 if (nfserr)
3800 return nfserr;
3801
d0a381dd
BF		 3802 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3803 if (!p)
3804 return nfserr_resource;
17456804 3805 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3806
03cfb420 3807 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3808 *p++ = stateid->ts_id_status;
17456804 3809 }
17456804
BS		 3810
3811 return nfserr;
3812}
3813
24bab491
AS		 3814static __be32
3815nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
3816 struct nfsd4_seek *seek)
3817{
3818 __be32 *p;
3819
3820 if (nfserr)
3821 return nfserr;
3822
3823 p = xdr_reserve_space(&resp->xdr, 4 + 8);
3824 *p++ = cpu_to_be32(seek->seek_eof);
3825 p = xdr_encode_hyper(p, seek->seek_pos);
3826
3827 return nfserr;
3828}
3829
695e12f8
BH		 3830static __be32
3831nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3832{
3833 return nfserr;
3834}
3835
3836typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3837
2db134eb
AA		 3838/*
3839 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3840 * since we don't need to filter out obsolete ops as this is
3841 * done in the decoding phase.
3842 */
695e12f8 3843static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3844 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3845 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3846 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3847 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3848 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3849 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3850 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3851 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3852 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3853 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3854 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3855 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3856 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3857 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3858 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3859 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3860 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3861 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3862 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3863 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3864 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3865 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3866 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3867 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3868 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3869 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3870 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3871 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3872 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3873 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3874 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3875 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3876 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3877 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3878 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3879 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3880 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3881
3882 /* NFSv4.1 operations */
3883 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3884 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3885 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3886 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 3887 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3888 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3889 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3890 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3891 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3892 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3893 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3894 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3895 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3896 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3897 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3898 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3899 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3900 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3901 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
87a15a80
AS		 3902
3903 /* NFSv4.2 operations */
3904 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
3905 [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop,
3906 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
3907 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
3908 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
3909 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
3910 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
3911 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
3912 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
3913 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
24bab491 3914 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
87a15a80 3915 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3916};
3917
496c262c 3918/*
a8095f7e
BF		 3919 * Calculate whether we still have space to encode repsize bytes.
3920 * There are two considerations:
3921 * - For NFS versions >=4.1, the size of the reply must stay within
3922 * session limits
3923 * - For all NFS versions, we must stay within limited preallocated
3924 * buffer space.
496c262c 3925 *
a8095f7e
BF		 3926 * This is called before the operation is processed, so can only provide
3927 * an upper estimate. For some nonidempotent operations (such as
3928 * getattr), it's not necessarily a problem if that estimate is wrong,
3929 * as we can fail it after processing without significant side effects.
496c262c 3930 */
a8095f7e 3931__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 3932{
67492c99 3933 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 3934 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 3935
47ee5298
BF		 3936 if (buf->len + respsize <= buf->buflen)
3937 return nfs_ok;
3938 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 3939 return nfserr_resource;
47ee5298
BF		 3940 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
3941 WARN_ON_ONCE(1);
3942 return nfserr_rep_too_big_to_cache;
ea8d7720 3943 }
47ee5298 3944 return nfserr_rep_too_big;
496c262c
AA		 3945}
3946
1da177e4
LT		 3947void
3948nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3949{
082d4bd7 3950 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 3951 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 3952 struct svc_rqst *rqstp = resp->rqstp;
082d4bd7 3953 int post_err_offset;
07d1f802 3954 nfsd4_enc encoder;
bc749ca4 3955 __be32 *p;
1da177e4 3956
d0a381dd
BF		 3957 p = xdr_reserve_space(xdr, 8);
3958 if (!p) {
3959 WARN_ON_ONCE(1);
3960 return;
3961 }
c373b0a4 3962 *p++ = cpu_to_be32(op->opnum);
082d4bd7 3963 post_err_offset = xdr->buf->len;
1da177e4 3964
695e12f8
BH		 3965 if (op->opnum == OP_ILLEGAL)
3966 goto status;
3967 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3968 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 3969 encoder = nfsd4_enc_ops[op->opnum];
3970 op->status = encoder(resp, op->status, &op->u);
2825a7f9
BF		 3971 xdr_commit_encode(xdr);
3972
067e1ace 3973 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 3974 if (!op->status) {
3975 int space_needed = 0;
3976 if (!nfsd4_last_compound_op(rqstp))
3977 space_needed = COMPOUND_ERR_SLACK_SPACE;
3978 op->status = nfsd4_check_resp_size(resp, space_needed);
3979 }
c8f13d97
BF		 3980 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
3981 struct nfsd4_slot *slot = resp->cstate.slot;
3982
3983 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
3984 op->status = nfserr_rep_too_big_to_cache;
3985 else
3986 op->status = nfserr_rep_too_big;
3987 }
07d1f802
BF		 3988 if (op->status == nfserr_resource ||
3989 op->status == nfserr_rep_too_big ||
3990 op->status == nfserr_rep_too_big_to_cache) {
3991 /*
3992 * The operation may have already been encoded or
3993 * partially encoded. No op returns anything additional
3994 * in the case of one of these three errors, so we can
3995 * just truncate back to after the status. But it's a
3996 * bug if we had to do this on a non-idempotent op:
3997 */
3998 warn_on_nonidempotent_op(op);
082d4bd7 3999 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 4000 }
9411b1d4 4001 if (so) {
082d4bd7
BF		 4002 int len = xdr->buf->len - post_err_offset;
4003
9411b1d4 4004 so->so_replay.rp_status = op->status;
082d4bd7
BF		 4005 so->so_replay.rp_buflen = len;
4006 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4007 so->so_replay.rp_buf, len);
9411b1d4 4008 }
695e12f8 4009status:
082d4bd7
BF		 4010 /* Note that op->status is already in network byte order: */
4011 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 4012}
4013
4014/*
4015 * Encode the reply stored in the stateowner reply cache
4016 *
4017 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4018 * previously sent already encoded operation.
1da177e4
LT		 4019 */
4020void
d0a381dd 4021nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 4022{
bc749ca4 4023 __be32 *p;
1da177e4
LT		 4024 struct nfs4_replay *rp = op->replay;
4025
4026 BUG_ON(!rp);
4027
d0a381dd
BF		 4028 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4029 if (!p) {
4030 WARN_ON_ONCE(1);
4031 return;
4032 }
c373b0a4 4033 *p++ = cpu_to_be32(op->opnum);
1da177e4 4034 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 4035
0c0c267b 4036 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 4037}
4038
1da177e4 4039int
2ebbc012 4040nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 4041{
4042 return xdr_ressize_check(rqstp, p);
4043}
4044
3e98abff 4045int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 4046{
3e98abff
BF		 4047 struct svc_rqst *rqstp = rq;
4048 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4049
1da177e4
LT		 4050 if (args->ops != args->iops) {
4051 kfree(args->ops);
4052 args->ops = args->iops;
4053 }
f99d49ad
JJ		 4054 kfree(args->tmpp);
4055 args->tmpp = NULL;
1da177e4 4056 while (args->to_free) {
d5e23383 4057 struct svcxdr_tmpbuf *tb = args->to_free;
1da177e4 4058 args->to_free = tb->next;
1da177e4
LT		 4059 kfree(tb);
4060 }
3e98abff 4061 return 1;
1da177e4
LT		 4062}
4063
4064int
2ebbc012 4065nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 4066{
e874f9f8
JL		 4067 if (rqstp->rq_arg.head[0].iov_len % 4) {
4068 /* client is nuts */
4069 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4070 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4071 return 0;
4072 }
1da177e4
LT		 4073 args->p = p;
4074 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4075 args->pagelist = rqstp->rq_arg.pages;
4076 args->pagelen = rqstp->rq_arg.page_len;
4077 args->tmpp = NULL;
4078 args->to_free = NULL;
4079 args->ops = args->iops;
4080 args->rqstp = rqstp;
4081
3e98abff 4082 return !nfsd4_decode_compound(args);
1da177e4
LT		 4083}
4084
4085int
2ebbc012 4086nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 4087{
4088 /*
4089 * All that remains is to write the tag and operation count...
4090 */
6ac90391
BF		 4091 struct xdr_buf *buf = resp->xdr.buf;
4092
4093 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4094 buf->tail[0].iov_len);
dd97fdde 4095
2825a7f9
BF		 4096 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4097
1da177e4
LT		 4098 p = resp->tagp;
4099 *p++ = htonl(resp->taglen);
4100 memcpy(p, resp->tag, resp->taglen);
4101 p += XDR_QUADLEN(resp->taglen);
4102 *p++ = htonl(resp->opcnt);
4103
b607664e 4104 nfsd4_sequence_done(resp);
1da177e4
LT		 4105 return 1;
4106}
4107
4108/*
4109 * Local variables:
4110 * c-basic-offset: 8
4111 * End:
4112 */
Michael's Linux tree.