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Linux 4.17-rc4
[linux-block.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1da177e4
LT		 34 */
35
96bcad50 36#include <linux/file.h>
5a0e3ad6 37#include <linux/slab.h>
1da177e4 38#include <linux/namei.h>
341eb184 39#include <linux/statfs.h>
0733d213 40#include <linux/utsname.h>
17456804 41#include <linux/pagemap.h>
4796f457 42#include <linux/sunrpc/svcauth_gss.h>
9a74af21 43
2ca72e17
BF		 44#include "idmap.h"
45#include "acl.h"
9a74af21 46#include "xdr4.h"
0a3adade 47#include "vfs.h"
17456804 48#include "state.h"
1091006c 49#include "cache.h"
3d733711 50#include "netns.h"
9cf514cc 51#include "pnfs.h"
2ca72e17 52
18032ca0
DQ		 53#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
54#include <linux/security.h>
55#endif
56
57
1da177e4
LT		 58#define NFSDDBG_FACILITY NFSDDBG_XDR
59
5cf23dbb 60const u32 nfsd_suppattrs[3][3] = {
916d2d84
BF		 61 {NFSD4_SUPPORTED_ATTRS_WORD0,
62 NFSD4_SUPPORTED_ATTRS_WORD1,
63 NFSD4_SUPPORTED_ATTRS_WORD2},
64
65 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
66 NFSD4_1_SUPPORTED_ATTRS_WORD1,
67 NFSD4_1_SUPPORTED_ATTRS_WORD2},
68
69 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
70 NFSD4_1_SUPPORTED_ATTRS_WORD1,
71 NFSD4_2_SUPPORTED_ATTRS_WORD2},
72};
73
42ca0993
BF		 74/*
75 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
76 * directory in order to indicate to the client that a filesystem boundary is present
77 * We use a fixed fsid for a referral
78 */
79#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
80#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
81
b37ad28b 82static __be32
a36b1725 83check_filename(char *str, int len)
1da177e4
LT		 84{
85 int i;
86
87 if (len == 0)
88 return nfserr_inval;
89 if (isdotent(str, len))
a36b1725 90 return nfserr_badname;
1da177e4
LT		 91 for (i = 0; i < len; i++)
92 if (str[i] == '/')
a36b1725 93 return nfserr_badname;
1da177e4
LT		 94 return 0;
95}
96
1da177e4 97#define DECODE_HEAD \
2ebbc012 98 __be32 *p; \
b37ad28b 99 __be32 status
1da177e4
LT		 100#define DECODE_TAIL \
101 status = 0; \
102out: \
103 return status; \
104xdr_error: \
817cb9d4
CL		 105 dprintk("NFSD: xdr error (%s:%d)\n", \
106 __FILE__, __LINE__); \
1da177e4
LT		 107 status = nfserr_bad_xdr; \
108 goto out
109
1da177e4
LT		 110#define READMEM(x,nbytes) do { \
111 x = (char *)p; \
112 p += XDR_QUADLEN(nbytes); \
113} while (0)
114#define SAVEMEM(x,nbytes) do { \
115 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
116 savemem(argp, p, nbytes) : \
117 (char *)p)) { \
817cb9d4
CL		 118 dprintk("NFSD: xdr error (%s:%d)\n", \
119 __FILE__, __LINE__); \
1da177e4
LT		 120 goto xdr_error; \
121 } \
122 p += XDR_QUADLEN(nbytes); \
123} while (0)
124#define COPYMEM(x,nbytes) do { \
125 memcpy((x), p, nbytes); \
126 p += XDR_QUADLEN(nbytes); \
127} while (0)
128
129/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
130#define READ_BUF(nbytes) do { \
131 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
132 p = argp->p; \
133 argp->p += XDR_QUADLEN(nbytes); \
134 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 135 dprintk("NFSD: xdr error (%s:%d)\n", \
136 __FILE__, __LINE__); \
1da177e4
LT		 137 goto xdr_error; \
138 } \
139} while (0)
140
590b7431
BF		 141static void next_decode_page(struct nfsd4_compoundargs *argp)
142{
590b7431 143 argp->p = page_address(argp->pagelist[0]);
365da4ad 144 argp->pagelist++;
590b7431 145 if (argp->pagelen < PAGE_SIZE) {
fc788f64 146 argp->end = argp->p + XDR_QUADLEN(argp->pagelen);
590b7431
BF		 147 argp->pagelen = 0;
148 } else {
149 argp->end = argp->p + (PAGE_SIZE>>2);
150 argp->pagelen -= PAGE_SIZE;
151 }
152}
153
ca2a05aa 154static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 155{
156 /* We want more bytes than seem to be available.
157 * Maybe we need a new page, maybe we have just run out
158 */
ca2a05aa 159 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 160 __be32 *p;
eae03e2a
CL		 161
162 if (argp->pagelen == 0) {
163 struct kvec *vec = &argp->rqstp->rq_arg.tail[0];
164
165 if (!argp->tail) {
166 argp->tail = true;
167 avail = vec->iov_len;
168 argp->p = vec->iov_base;
169 argp->end = vec->iov_base + avail;
170 }
171
172 if (avail < nbytes)
173 return NULL;
174
175 p = argp->p;
176 argp->p += XDR_QUADLEN(nbytes);
177 return p;
178 }
179
1da177e4
LT		 180 if (avail + argp->pagelen < nbytes)
181 return NULL;
182 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
183 return NULL;
184 /* ok, we can do it with the current plus the next page */
185 if (nbytes <= sizeof(argp->tmp))
186 p = argp->tmp;
187 else {
f99d49ad 188 kfree(argp->tmpp);
1da177e4
LT		 189 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
190 if (!p)
191 return NULL;
192
193 }
ca2a05aa
BF		 194 /*
195 * The following memcpy is safe because read_buf is always
196 * called with nbytes > avail, and the two cases above both
197 * guarantee p points to at least nbytes bytes.
198 */
1da177e4 199 memcpy(p, argp->p, avail);
590b7431 200 next_decode_page(argp);
1da177e4
LT		 201 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
202 argp->p += XDR_QUADLEN(nbytes - avail);
203 return p;
204}
205
60adfc50
AA		 206static int zero_clientid(clientid_t *clid)
207{
208 return (clid->cl_boot == 0) && (clid->cl_id == 0);
209}
210
2d8498db 211/**
d5e23383 212 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
ce043ac8
BF		 213 * @argp: NFSv4 compound argument structure
214 * @p: pointer to be freed (with kfree())
2d8498db
CH		 215 *
216 * Marks @p to be freed when processing the compound operation
217 * described in @argp finishes.
218 */
d5e23383
BF		 219static void *
220svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
1da177e4 221{
d5e23383 222 struct svcxdr_tmpbuf *tb;
1da177e4 223
d5e23383 224 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
1da177e4 225 if (!tb)
d5e23383 226 return NULL;
1da177e4
LT		 227 tb->next = argp->to_free;
228 argp->to_free = tb;
d5e23383 229 return tb->buf;
1da177e4
LT		 230}
231
29c353b3
BF		 232/*
233 * For xdr strings that need to be passed to other kernel api's
234 * as null-terminated strings.
235 *
236 * Note null-terminating in place usually isn't safe since the
237 * buffer might end on a page boundary.
238 */
239static char *
240svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
241{
d5e23383 242 char *p = svcxdr_tmpalloc(argp, len + 1);
29c353b3
BF		 243
244 if (!p)
245 return NULL;
246 memcpy(p, buf, len);
247 p[len] = '\0';
29c353b3 248 return p;
1da177e4
LT		 249}
250
2d8498db
CH		 251/**
252 * savemem - duplicate a chunk of memory for later processing
253 * @argp: NFSv4 compound argument structure to be freed with
254 * @p: pointer to be duplicated
255 * @nbytes: length to be duplicated
256 *
257 * Returns a pointer to a copy of @nbytes bytes of memory at @p
258 * that are preserved until processing of the NFSv4 compound
259 * operation described by @argp finishes.
260 */
2ebbc012 261static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 262{
d5e23383
BF		 263 void *ret;
264
265 ret = svcxdr_tmpalloc(argp, nbytes);
266 if (!ret)
1da177e4 267 return NULL;
d5e23383
BF		 268 memcpy(ret, p, nbytes);
269 return ret;
1da177e4
LT		 270}
271
4c94e13e
CH		 272/*
273 * We require the high 32 bits of 'seconds' to be 0, and
274 * we ignore all 32 bits of 'nseconds'.
275 */
276static __be32
277nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
278{
279 DECODE_HEAD;
280 u64 sec;
281
282 READ_BUF(12);
283 p = xdr_decode_hyper(p, &sec);
284 tv->tv_sec = sec;
285 tv->tv_nsec = be32_to_cpup(p++);
286 if (tv->tv_nsec >= (u32)1000000000)
287 return nfserr_inval;
288
289 DECODE_TAIL;
290}
291
b37ad28b 292static __be32
1da177e4
LT		 293nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
294{
295 u32 bmlen;
296 DECODE_HEAD;
297
298 bmval[0] = 0;
299 bmval[1] = 0;
7e705706 300 bmval[2] = 0;
1da177e4
LT		 301
302 READ_BUF(4);
06553991 303 bmlen = be32_to_cpup(p++);
1da177e4
LT		 304 if (bmlen > 1000)
305 goto xdr_error;
306
307 READ_BUF(bmlen << 2);
308 if (bmlen > 0)
06553991 309 bmval[0] = be32_to_cpup(p++);
1da177e4 310 if (bmlen > 1)
06553991 311 bmval[1] = be32_to_cpup(p++);
7e705706 312 if (bmlen > 2)
06553991 313 bmval[2] = be32_to_cpup(p++);
1da177e4
LT		 314
315 DECODE_TAIL;
316}
317
b37ad28b 318static __be32
3c8e0316 319nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0 320 struct iattr *iattr, struct nfs4_acl **acl,
47057abd 321 struct xdr_netobj *label, int *umask)
1da177e4
LT		 322{
323 int expected_len, len = 0;
324 u32 dummy32;
325 char *buf;
326
327 DECODE_HEAD;
328 iattr->ia_valid = 0;
329 if ((status = nfsd4_decode_bitmap(argp, bmval)))
330 return status;
331
e864c189
BF		 332 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
333 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
334 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
335 if (nfsd_attrs_supported(argp->minorversion, bmval))
336 return nfserr_inval;
337 return nfserr_attrnotsupp;
338 }
339
1da177e4 340 READ_BUF(4);
06553991 341 expected_len = be32_to_cpup(p++);
1da177e4
LT		 342
343 if (bmval[0] & FATTR4_WORD0_SIZE) {
344 READ_BUF(8);
345 len += 8;
542d1ab3 346 p = xdr_decode_hyper(p, &iattr->ia_size);
1da177e4
LT		 347 iattr->ia_valid |= ATTR_SIZE;
348 }
349 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 350 u32 nace;
28e05dd8 351 struct nfs4_ace *ace;
1da177e4
LT		 352
353 READ_BUF(4); len += 4;
06553991 354 nace = be32_to_cpup(p++);
1da177e4 355
28e05dd8 356 if (nace > NFS4_ACL_MAX)
798df338 357 return nfserr_fbig;
28e05dd8 358
d5e23383 359 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
eba1c99c
KM		 360 if (*acl == NULL)
361 return nfserr_jukebox;
362
28e05dd8
BF		 363 (*acl)->naces = nace;
364 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 365 READ_BUF(16); len += 16;
06553991
BF		 366 ace->type = be32_to_cpup(p++);
367 ace->flag = be32_to_cpup(p++);
368 ace->access_mask = be32_to_cpup(p++);
369 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 370 READ_BUF(dummy32);
371 len += XDR_QUADLEN(dummy32) << 2;
372 READMEM(buf, dummy32);
28e05dd8 373 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 374 status = nfs_ok;
28e05dd8 375 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 376 ;
28e05dd8 377 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 378 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 379 buf, dummy32, &ace->who_gid);
1da177e4 380 else
3c726023 381 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 382 buf, dummy32, &ace->who_uid);
3c726023
BF		 383 if (status)
384 return status;
1da177e4
LT		 385 }
386 } else
387 *acl = NULL;
388 if (bmval[1] & FATTR4_WORD1_MODE) {
389 READ_BUF(4);
390 len += 4;
06553991 391 iattr->ia_mode = be32_to_cpup(p++);
1da177e4
LT		 392 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
393 iattr->ia_valid |= ATTR_MODE;
394 }
395 if (bmval[1] & FATTR4_WORD1_OWNER) {
396 READ_BUF(4);
397 len += 4;
06553991 398 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 399 READ_BUF(dummy32);
400 len += (XDR_QUADLEN(dummy32) << 2);
401 READMEM(buf, dummy32);
47c85291
N		 402 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
403 return status;
1da177e4
LT		 404 iattr->ia_valid |= ATTR_UID;
405 }
406 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
407 READ_BUF(4);
408 len += 4;
06553991 409 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 410 READ_BUF(dummy32);
411 len += (XDR_QUADLEN(dummy32) << 2);
412 READMEM(buf, dummy32);
47c85291
N		 413 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
414 return status;
1da177e4
LT		 415 iattr->ia_valid |= ATTR_GID;
416 }
417 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
418 READ_BUF(4);
419 len += 4;
06553991 420 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 421 switch (dummy32) {
422 case NFS4_SET_TO_CLIENT_TIME:
1da177e4 423 len += 12;
4c94e13e
CH		 424 status = nfsd4_decode_time(argp, &iattr->ia_atime);
425 if (status)
426 return status;
1da177e4
LT		 427 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
428 break;
429 case NFS4_SET_TO_SERVER_TIME:
430 iattr->ia_valid |= ATTR_ATIME;
431 break;
432 default:
433 goto xdr_error;
434 }
435 }
1da177e4
LT		 436 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
437 READ_BUF(4);
438 len += 4;
06553991 439 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 440 switch (dummy32) {
441 case NFS4_SET_TO_CLIENT_TIME:
1da177e4 442 len += 12;
4c94e13e
CH		 443 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
444 if (status)
445 return status;
1da177e4
LT		 446 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
447 break;
448 case NFS4_SET_TO_SERVER_TIME:
449 iattr->ia_valid |= ATTR_MTIME;
450 break;
451 default:
452 goto xdr_error;
453 }
454 }
18032ca0
DQ		 455
456 label->len = 0;
2285ae76
AB		 457 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
458 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
18032ca0
DQ		 459 READ_BUF(4);
460 len += 4;
06553991 461 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
18032ca0
DQ		 462 READ_BUF(4);
463 len += 4;
06553991 464 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
18032ca0
DQ		 465 READ_BUF(4);
466 len += 4;
06553991 467 dummy32 = be32_to_cpup(p++);
18032ca0 468 READ_BUF(dummy32);
1ec8c0c4 469 if (dummy32 > NFS4_MAXLABELLEN)
18032ca0
DQ		 470 return nfserr_badlabel;
471 len += (XDR_QUADLEN(dummy32) << 2);
472 READMEM(buf, dummy32);
29c353b3
BF		 473 label->len = dummy32;
474 label->data = svcxdr_dupstr(argp, buf, dummy32);
18032ca0
DQ		 475 if (!label->data)
476 return nfserr_jukebox;
18032ca0 477 }
47057abd
AG		 478 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
479 if (!umask)
480 goto xdr_error;
481 READ_BUF(8);
482 len += 8;
483 dummy32 = be32_to_cpup(p++);
484 iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO);
485 dummy32 = be32_to_cpup(p++);
486 *umask = dummy32 & S_IRWXUGO;
487 iattr->ia_valid |= ATTR_MODE;
488 }
e864c189 489 if (len != expected_len)
1da177e4
LT		 490 goto xdr_error;
491
492 DECODE_TAIL;
1da177e4
LT		 493}
494
e31a1b66
BH		 495static __be32
496nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
497{
498 DECODE_HEAD;
499
500 READ_BUF(sizeof(stateid_t));
06553991 501 sid->si_generation = be32_to_cpup(p++);
e31a1b66
BH		 502 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
503
504 DECODE_TAIL;
505}
506
b37ad28b 507static __be32
1da177e4
LT		 508nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
509{
510 DECODE_HEAD;
511
512 READ_BUF(4);
06553991 513 access->ac_req_access = be32_to_cpup(p++);
1da177e4
LT		 514
515 DECODE_TAIL;
516}
517
acb2887e
BF		 518static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
519{
520 DECODE_HEAD;
12fc3e92 521 u32 dummy, uid, gid;
acb2887e
BF		 522 char *machine_name;
523 int i;
524 int nr_secflavs;
525
526 /* callback_sec_params4 */
527 READ_BUF(4);
06553991 528 nr_secflavs = be32_to_cpup(p++);
57569a70
BF		 529 if (nr_secflavs)
530 cbs->flavor = (u32)(-1);
531 else
532 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
533 cbs->flavor = 0;
acb2887e
BF		 534 for (i = 0; i < nr_secflavs; ++i) {
535 READ_BUF(4);
06553991 536 dummy = be32_to_cpup(p++);
acb2887e
BF		 537 switch (dummy) {
538 case RPC_AUTH_NULL:
539 /* Nothing to read */
12fc3e92
BF		 540 if (cbs->flavor == (u32)(-1))
541 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 542 break;
543 case RPC_AUTH_UNIX:
544 READ_BUF(8);
545 /* stamp */
06553991 546 dummy = be32_to_cpup(p++);
acb2887e
BF		 547
548 /* machine name */
06553991 549 dummy = be32_to_cpup(p++);
acb2887e
BF		 550 READ_BUF(dummy);
551 SAVEMEM(machine_name, dummy);
552
553 /* uid, gid */
554 READ_BUF(8);
06553991
BF		 555 uid = be32_to_cpup(p++);
556 gid = be32_to_cpup(p++);
acb2887e
BF		 557
558 /* more gids */
559 READ_BUF(4);
06553991 560 dummy = be32_to_cpup(p++);
acb2887e 561 READ_BUF(dummy * 4);
12fc3e92 562 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 563 kuid_t kuid = make_kuid(&init_user_ns, uid);
564 kgid_t kgid = make_kgid(&init_user_ns, gid);
565 if (uid_valid(kuid) && gid_valid(kgid)) {
566 cbs->uid = kuid;
567 cbs->gid = kgid;
568 cbs->flavor = RPC_AUTH_UNIX;
569 } else {
570 dprintk("RPC_AUTH_UNIX with invalid"
571 "uid or gid ignoring!\n");
572 }
12fc3e92 573 }
acb2887e
BF		 574 break;
575 case RPC_AUTH_GSS:
576 dprintk("RPC_AUTH_GSS callback secflavor "
577 "not supported!\n");
578 READ_BUF(8);
579 /* gcbp_service */
06553991 580 dummy = be32_to_cpup(p++);
acb2887e 581 /* gcbp_handle_from_server */
06553991 582 dummy = be32_to_cpup(p++);
acb2887e
BF		 583 READ_BUF(dummy);
584 p += XDR_QUADLEN(dummy);
585 /* gcbp_handle_from_client */
586 READ_BUF(4);
06553991 587 dummy = be32_to_cpup(p++);
acb2887e
BF		 588 READ_BUF(dummy);
589 break;
590 default:
591 dprintk("Illegal callback secflavor\n");
592 return nfserr_inval;
593 }
594 }
595 DECODE_TAIL;
596}
597
cb73a9f4
BF		 598static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
599{
600 DECODE_HEAD;
601
602 READ_BUF(4);
06553991 603 bc->bc_cb_program = be32_to_cpup(p++);
cb73a9f4
BF		 604 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
605
606 DECODE_TAIL;
607}
608
1d1bc8f2
BF		 609static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
610{
611 DECODE_HEAD;
1d1bc8f2
BF		 612
613 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
614 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991 615 bcts->dir = be32_to_cpup(p++);
6ce2357f
BS		 616 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
617 * could help us figure out we should be using it. */
1d1bc8f2
BF		 618 DECODE_TAIL;
619}
620
b37ad28b 621static __be32
1da177e4
LT		 622nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
623{
624 DECODE_HEAD;
625
e31a1b66 626 READ_BUF(4);
06553991 627 close->cl_seqid = be32_to_cpup(p++);
e31a1b66 628 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 629
630 DECODE_TAIL;
631}
632
633
b37ad28b 634static __be32
1da177e4
LT		 635nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
636{
637 DECODE_HEAD;
638
639 READ_BUF(12);
542d1ab3 640 p = xdr_decode_hyper(p, &commit->co_offset);
06553991 641 commit->co_count = be32_to_cpup(p++);
1da177e4
LT		 642
643 DECODE_TAIL;
644}
645
b37ad28b 646static __be32
1da177e4
LT		 647nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
648{
649 DECODE_HEAD;
650
651 READ_BUF(4);
06553991 652 create->cr_type = be32_to_cpup(p++);
1da177e4
LT		 653 switch (create->cr_type) {
654 case NF4LNK:
655 READ_BUF(4);
7fb84306
BF		 656 create->cr_datalen = be32_to_cpup(p++);
657 READ_BUF(create->cr_datalen);
29c353b3 658 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
7fb84306 659 if (!create->cr_data)
76f47128 660 return nfserr_jukebox;
1da177e4
LT		 661 break;
662 case NF4BLK:
663 case NF4CHR:
664 READ_BUF(8);
06553991
BF		 665 create->cr_specdata1 = be32_to_cpup(p++);
666 create->cr_specdata2 = be32_to_cpup(p++);
1da177e4
LT		 667 break;
668 case NF4SOCK:
669 case NF4FIFO:
670 case NF4DIR:
671 default:
672 break;
673 }
674
675 READ_BUF(4);
06553991 676 create->cr_namelen = be32_to_cpup(p++);
1da177e4
LT		 677 READ_BUF(create->cr_namelen);
678 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 679 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 680 return status;
681
3c8e0316 682 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
47057abd 683 &create->cr_acl, &create->cr_label,
880a3a53 684 &create->cr_umask);
c0d6fc8a 685 if (status)
1da177e4
LT		 686 goto out;
687
688 DECODE_TAIL;
689}
690
b37ad28b 691static inline __be32
1da177e4
LT		 692nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
693{
e31a1b66 694 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 695}
696
b37ad28b 697static inline __be32
1da177e4
LT		 698nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
699{
700 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
701}
702
b37ad28b 703static __be32
1da177e4
LT		 704nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
705{
706 DECODE_HEAD;
707
708 READ_BUF(4);
06553991 709 link->li_namelen = be32_to_cpup(p++);
1da177e4
LT		 710 READ_BUF(link->li_namelen);
711 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 712 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 713 return status;
714
715 DECODE_TAIL;
716}
717
b37ad28b 718static __be32
1da177e4
LT		 719nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
720{
721 DECODE_HEAD;
722
1da177e4
LT		 723 /*
724 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
725 */
726 READ_BUF(28);
06553991 727 lock->lk_type = be32_to_cpup(p++);
1da177e4
LT		 728 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
729 goto xdr_error;
06553991 730 lock->lk_reclaim = be32_to_cpup(p++);
542d1ab3
BF		 731 p = xdr_decode_hyper(p, &lock->lk_offset);
732 p = xdr_decode_hyper(p, &lock->lk_length);
06553991 733 lock->lk_is_new = be32_to_cpup(p++);
1da177e4
LT		 734
735 if (lock->lk_is_new) {
e31a1b66 736 READ_BUF(4);
06553991 737 lock->lk_new_open_seqid = be32_to_cpup(p++);
e31a1b66
BH		 738 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
739 if (status)
740 return status;
741 READ_BUF(8 + sizeof(clientid_t));
06553991 742 lock->lk_new_lock_seqid = be32_to_cpup(p++);
1da177e4 743 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
06553991 744 lock->lk_new_owner.len = be32_to_cpup(p++);
1da177e4
LT		 745 READ_BUF(lock->lk_new_owner.len);
746 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
747 } else {
e31a1b66
BH		 748 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
749 if (status)
750 return status;
751 READ_BUF(4);
06553991 752 lock->lk_old_lock_seqid = be32_to_cpup(p++);
1da177e4
LT		 753 }
754
755 DECODE_TAIL;
756}
757
b37ad28b 758static __be32
1da177e4
LT		 759nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
760{
761 DECODE_HEAD;
762
763 READ_BUF(32);
06553991 764 lockt->lt_type = be32_to_cpup(p++);
1da177e4
LT		 765 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
766 goto xdr_error;
542d1ab3
BF		 767 p = xdr_decode_hyper(p, &lockt->lt_offset);
768 p = xdr_decode_hyper(p, &lockt->lt_length);
1da177e4 769 COPYMEM(&lockt->lt_clientid, 8);
06553991 770 lockt->lt_owner.len = be32_to_cpup(p++);
1da177e4
LT		 771 READ_BUF(lockt->lt_owner.len);
772 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
773
774 DECODE_TAIL;
775}
776
b37ad28b 777static __be32
1da177e4
LT		 778nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
779{
780 DECODE_HEAD;
781
e31a1b66 782 READ_BUF(8);
06553991 783 locku->lu_type = be32_to_cpup(p++);
1da177e4
LT		 784 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
785 goto xdr_error;
06553991 786 locku->lu_seqid = be32_to_cpup(p++);
e31a1b66
BH		 787 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
788 if (status)
789 return status;
790 READ_BUF(16);
542d1ab3
BF		 791 p = xdr_decode_hyper(p, &locku->lu_offset);
792 p = xdr_decode_hyper(p, &locku->lu_length);
1da177e4
LT		 793
794 DECODE_TAIL;
795}
796
b37ad28b 797static __be32
1da177e4
LT		 798nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
799{
800 DECODE_HEAD;
801
802 READ_BUF(4);
06553991 803 lookup->lo_len = be32_to_cpup(p++);
1da177e4
LT		 804 READ_BUF(lookup->lo_len);
805 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 806 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 807 return status;
808
809 DECODE_TAIL;
810}
811
2c8bd7e0 812static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 813{
814 __be32 *p;
815 u32 w;
816
817 READ_BUF(4);
06553991 818 w = be32_to_cpup(p++);
2c8bd7e0
BH		 819 *share_access = w & NFS4_SHARE_ACCESS_MASK;
820 *deleg_want = w & NFS4_SHARE_WANT_MASK;
821 if (deleg_when)
822 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
823
04f9e664
BF		 824 switch (w & NFS4_SHARE_ACCESS_MASK) {
825 case NFS4_SHARE_ACCESS_READ:
826 case NFS4_SHARE_ACCESS_WRITE:
827 case NFS4_SHARE_ACCESS_BOTH:
828 break;
829 default:
830 return nfserr_bad_xdr;
831 }
fc0d14fe 832 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 833 if (!w)
834 return nfs_ok;
835 if (!argp->minorversion)
836 return nfserr_bad_xdr;
837 switch (w & NFS4_SHARE_WANT_MASK) {
838 case NFS4_SHARE_WANT_NO_PREFERENCE:
839 case NFS4_SHARE_WANT_READ_DELEG:
840 case NFS4_SHARE_WANT_WRITE_DELEG:
841 case NFS4_SHARE_WANT_ANY_DELEG:
842 case NFS4_SHARE_WANT_NO_DELEG:
843 case NFS4_SHARE_WANT_CANCEL:
844 break;
845 default:
846 return nfserr_bad_xdr;
847 }
92bac8c5 848 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 849 if (!w)
850 return nfs_ok;
2c8bd7e0
BH		 851
852 if (!deleg_when) /* open_downgrade */
853 return nfserr_inval;
04f9e664
BF		 854 switch (w) {
855 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
856 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 857 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
858 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 859 return nfs_ok;
860 }
861xdr_error:
862 return nfserr_bad_xdr;
863}
864
865static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
866{
867 __be32 *p;
868
869 READ_BUF(4);
06553991 870 *x = be32_to_cpup(p++);
04f9e664 871 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 872 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 873 return nfserr_bad_xdr;
874 return nfs_ok;
875xdr_error:
876 return nfserr_bad_xdr;
877}
878
a084daf5
BF		 879static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
880{
881 __be32 *p;
882
883 READ_BUF(4);
06553991 884 o->len = be32_to_cpup(p++);
a084daf5
BF		 885
886 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
887 return nfserr_bad_xdr;
888
889 READ_BUF(o->len);
890 SAVEMEM(o->data, o->len);
891 return nfs_ok;
892xdr_error:
893 return nfserr_bad_xdr;
894}
895
b37ad28b 896static __be32
1da177e4
LT		 897nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
898{
899 DECODE_HEAD;
2c8bd7e0 900 u32 dummy;
1da177e4
LT		 901
902 memset(open->op_bmval, 0, sizeof(open->op_bmval));
903 open->op_iattr.ia_valid = 0;
fe0750e5 904 open->op_openowner = NULL;
1da177e4 905
9d313b17 906 open->op_xdr_error = 0;
1da177e4 907 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 908 READ_BUF(4);
06553991 909 open->op_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 910 /* decode, yet ignore deleg_when until supported */
911 status = nfsd4_decode_share_access(argp, &open->op_share_access,
912 &open->op_deleg_want, &dummy);
04f9e664
BF		 913 if (status)
914 goto xdr_error;
915 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
916 if (status)
917 goto xdr_error;
a084daf5 918 READ_BUF(sizeof(clientid_t));
1da177e4 919 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 920 status = nfsd4_decode_opaque(argp, &open->op_owner);
921 if (status)
922 goto xdr_error;
923 READ_BUF(4);
06553991 924 open->op_create = be32_to_cpup(p++);
1da177e4
LT		 925 switch (open->op_create) {
926 case NFS4_OPEN_NOCREATE:
927 break;
928 case NFS4_OPEN_CREATE:
929 READ_BUF(4);
06553991 930 open->op_createmode = be32_to_cpup(p++);
1da177e4
LT		 931 switch (open->op_createmode) {
932 case NFS4_CREATE_UNCHECKED:
933 case NFS4_CREATE_GUARDED:
c0d6fc8a 934 status = nfsd4_decode_fattr(argp, open->op_bmval,
47057abd 935 &open->op_iattr, &open->op_acl, &open->op_label,
880a3a53 936 &open->op_umask);
c0d6fc8a 937 if (status)
1da177e4
LT		 938 goto out;
939 break;
940 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 941 READ_BUF(NFS4_VERIFIER_SIZE);
942 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 943 break;
79fb54ab
BH		 944 case NFS4_CREATE_EXCLUSIVE4_1:
945 if (argp->minorversion < 1)
946 goto xdr_error;
ab4684d1
CL		 947 READ_BUF(NFS4_VERIFIER_SIZE);
948 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 949 status = nfsd4_decode_fattr(argp, open->op_bmval,
47057abd 950 &open->op_iattr, &open->op_acl, &open->op_label,
880a3a53 951 &open->op_umask);
79fb54ab
BH		 952 if (status)
953 goto out;
954 break;
1da177e4
LT		 955 default:
956 goto xdr_error;
957 }
958 break;
959 default:
960 goto xdr_error;
961 }
962
963 /* open_claim */
964 READ_BUF(4);
06553991 965 open->op_claim_type = be32_to_cpup(p++);
1da177e4
LT		 966 switch (open->op_claim_type) {
967 case NFS4_OPEN_CLAIM_NULL:
968 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
969 READ_BUF(4);
06553991 970 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 971 READ_BUF(open->op_fname.len);
972 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 973 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 974 return status;
975 break;
976 case NFS4_OPEN_CLAIM_PREVIOUS:
977 READ_BUF(4);
06553991 978 open->op_delegate_type = be32_to_cpup(p++);
1da177e4
LT		 979 break;
980 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 981 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
982 if (status)
983 return status;
984 READ_BUF(4);
06553991 985 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 986 READ_BUF(open->op_fname.len);
987 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 988 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 989 return status;
990 break;
8b289b2c
BF		 991 case NFS4_OPEN_CLAIM_FH:
992 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
993 if (argp->minorversion < 1)
994 goto xdr_error;
995 /* void */
996 break;
997 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
998 if (argp->minorversion < 1)
999 goto xdr_error;
1000 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
1001 if (status)
1002 return status;
1003 break;
1da177e4
LT		 1004 default:
1005 goto xdr_error;
1006 }
1007
1008 DECODE_TAIL;
1009}
1010
b37ad28b 1011static __be32
1da177e4
LT		 1012nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1013{
1014 DECODE_HEAD;
e1a90ebd
AS		 1015
1016 if (argp->minorversion >= 1)
1017 return nfserr_notsupp;
1018
e31a1b66
BH		 1019 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
1020 if (status)
1021 return status;
1022 READ_BUF(4);
06553991 1023 open_conf->oc_seqid = be32_to_cpup(p++);
e1a90ebd 1024
1da177e4
LT		 1025 DECODE_TAIL;
1026}
1027
b37ad28b 1028static __be32
1da177e4
LT		 1029nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1030{
1031 DECODE_HEAD;
1032
e31a1b66
BH		 1033 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
1034 if (status)
1035 return status;
04f9e664 1036 READ_BUF(4);
06553991 1037 open_down->od_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 1038 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1039 &open_down->od_deleg_want, NULL);
04f9e664
BF		 1040 if (status)
1041 return status;
1042 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1043 if (status)
1044 return status;
1da177e4
LT		 1045 DECODE_TAIL;
1046}
1047
b37ad28b 1048static __be32
1da177e4
LT		 1049nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1050{
1051 DECODE_HEAD;
1052
1053 READ_BUF(4);
06553991 1054 putfh->pf_fhlen = be32_to_cpup(p++);
1da177e4
LT		 1055 if (putfh->pf_fhlen > NFS4_FHSIZE)
1056 goto xdr_error;
1057 READ_BUF(putfh->pf_fhlen);
1058 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1059
1060 DECODE_TAIL;
1061}
1062
e1a90ebd
AS		 1063static __be32
1064nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1065{
1066 if (argp->minorversion == 0)
1067 return nfs_ok;
1068 return nfserr_notsupp;
1069}
1070
b37ad28b 1071static __be32
1da177e4
LT		 1072nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1073{
1074 DECODE_HEAD;
1075
e31a1b66
BH		 1076 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1077 if (status)
1078 return status;
1079 READ_BUF(12);
542d1ab3 1080 p = xdr_decode_hyper(p, &read->rd_offset);
06553991 1081 read->rd_length = be32_to_cpup(p++);
1da177e4
LT		 1082
1083 DECODE_TAIL;
1084}
1085
b37ad28b 1086static __be32
1da177e4
LT		 1087nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1088{
1089 DECODE_HEAD;
1090
1091 READ_BUF(24);
542d1ab3 1092 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1da177e4 1093 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
06553991
BF		 1094 readdir->rd_dircount = be32_to_cpup(p++);
1095 readdir->rd_maxcount = be32_to_cpup(p++);
1da177e4
LT		 1096 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1097 goto out;
1098
1099 DECODE_TAIL;
1100}
1101
b37ad28b 1102static __be32
1da177e4
LT		 1103nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1104{
1105 DECODE_HEAD;
1106
1107 READ_BUF(4);
06553991 1108 remove->rm_namelen = be32_to_cpup(p++);
1da177e4
LT		 1109 READ_BUF(remove->rm_namelen);
1110 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1111 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1112 return status;
1113
1114 DECODE_TAIL;
1115}
1116
b37ad28b 1117static __be32
1da177e4
LT		 1118nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1119{
1120 DECODE_HEAD;
1121
1122 READ_BUF(4);
06553991 1123 rename->rn_snamelen = be32_to_cpup(p++);
4aed9c46 1124 READ_BUF(rename->rn_snamelen);
1da177e4 1125 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
4aed9c46 1126 READ_BUF(4);
06553991 1127 rename->rn_tnamelen = be32_to_cpup(p++);
1da177e4
LT		 1128 READ_BUF(rename->rn_tnamelen);
1129 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1130 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1131 return status;
a36b1725 1132 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1133 return status;
1134
1135 DECODE_TAIL;
1136}
1137
b37ad28b 1138static __be32
1da177e4
LT		 1139nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1140{
1141 DECODE_HEAD;
1142
e1a90ebd
AS		 1143 if (argp->minorversion >= 1)
1144 return nfserr_notsupp;
1145
1da177e4
LT		 1146 READ_BUF(sizeof(clientid_t));
1147 COPYMEM(clientid, sizeof(clientid_t));
1148
1149 DECODE_TAIL;
1150}
1151
dcb488a3
AA		 1152static __be32
1153nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1154 struct nfsd4_secinfo *secinfo)
1155{
1156 DECODE_HEAD;
1157
1158 READ_BUF(4);
06553991 1159 secinfo->si_namelen = be32_to_cpup(p++);
dcb488a3
AA		 1160 READ_BUF(secinfo->si_namelen);
1161 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1162 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1163 if (status)
1164 return status;
1165 DECODE_TAIL;
1166}
1167
04f4ad16
BF		 1168static __be32
1169nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1170 struct nfsd4_secinfo_no_name *sin)
1171{
1172 DECODE_HEAD;
1173
1174 READ_BUF(4);
06553991 1175 sin->sin_style = be32_to_cpup(p++);
04f4ad16
BF		 1176 DECODE_TAIL;
1177}
1178
b37ad28b 1179static __be32
1da177e4
LT		 1180nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1181{
e31a1b66 1182 __be32 status;
1da177e4 1183
e31a1b66
BH		 1184 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1185 if (status)
1186 return status;
3c8e0316 1187 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
47057abd 1188 &setattr->sa_acl, &setattr->sa_label, NULL);
1da177e4
LT		 1189}
1190
b37ad28b 1191static __be32
1da177e4
LT		 1192nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1193{
1194 DECODE_HEAD;
1195
e1a90ebd
AS		 1196 if (argp->minorversion >= 1)
1197 return nfserr_notsupp;
1198
ab4684d1
CL		 1199 READ_BUF(NFS4_VERIFIER_SIZE);
1200 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1201
a084daf5
BF		 1202 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1203 if (status)
1204 return nfserr_bad_xdr;
1205 READ_BUF(8);
06553991
BF		 1206 setclientid->se_callback_prog = be32_to_cpup(p++);
1207 setclientid->se_callback_netid_len = be32_to_cpup(p++);
4aed9c46 1208 READ_BUF(setclientid->se_callback_netid_len);
1da177e4 1209 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
4aed9c46 1210 READ_BUF(4);
06553991 1211 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1da177e4 1212
4aed9c46 1213 READ_BUF(setclientid->se_callback_addr_len);
1da177e4 1214 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
4aed9c46 1215 READ_BUF(4);
06553991 1216 setclientid->se_callback_ident = be32_to_cpup(p++);
1da177e4
LT		 1217
1218 DECODE_TAIL;
1219}
1220
b37ad28b 1221static __be32
1da177e4
LT		 1222nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1223{
1224 DECODE_HEAD;
1225
e1a90ebd
AS		 1226 if (argp->minorversion >= 1)
1227 return nfserr_notsupp;
1228
ab4684d1 1229 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1230 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1231 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1232
1233 DECODE_TAIL;
1234}
1235
1236/* Also used for NVERIFY */
b37ad28b 1237static __be32
1da177e4
LT		 1238nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1239{
1da177e4
LT		 1240 DECODE_HEAD;
1241
1242 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1243 goto out;
1244
1245 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1246 * nfsd4_proc_verify */
1247
1da177e4 1248 READ_BUF(4);
06553991 1249 verify->ve_attrlen = be32_to_cpup(p++);
1da177e4
LT		 1250 READ_BUF(verify->ve_attrlen);
1251 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1252
1253 DECODE_TAIL;
1254}
1255
b37ad28b 1256static __be32
1da177e4
LT		 1257nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1258{
1259 int avail;
1da177e4
LT		 1260 int len;
1261 DECODE_HEAD;
1262
e31a1b66
BH		 1263 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1264 if (status)
1265 return status;
1266 READ_BUF(16);
542d1ab3 1267 p = xdr_decode_hyper(p, &write->wr_offset);
06553991 1268 write->wr_stable_how = be32_to_cpup(p++);
54bbb7d2 1269 if (write->wr_stable_how > NFS_FILE_SYNC)
1da177e4 1270 goto xdr_error;
06553991 1271 write->wr_buflen = be32_to_cpup(p++);
1da177e4
LT		 1272
1273 /* Sorry .. no magic macros for this.. *
1274 * READ_BUF(write->wr_buflen);
1275 * SAVEMEM(write->wr_buf, write->wr_buflen);
1276 */
1277 avail = (char*)argp->end - (char*)argp->p;
1278 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1279 dprintk("NFSD: xdr error (%s:%d)\n",
1280 __FILE__, __LINE__);
1da177e4
LT		 1281 goto xdr_error;
1282 }
70cc7f75
BF		 1283 write->wr_head.iov_base = p;
1284 write->wr_head.iov_len = avail;
70cc7f75 1285 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1286
1287 len = XDR_QUADLEN(write->wr_buflen) << 2;
1288 if (len >= avail) {
1289 int pages;
1290
1291 len -= avail;
1292
1293 pages = len >> PAGE_SHIFT;
1294 argp->pagelist += pages;
1295 argp->pagelen -= pages * PAGE_SIZE;
1296 len -= pages * PAGE_SIZE;
1297
fc788f64 1298 next_decode_page(argp);
1da177e4 1299 }
5a80a54d 1300 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1301
1302 DECODE_TAIL;
1303}
1304
b37ad28b 1305static __be32
1da177e4
LT		 1306nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1307{
1308 DECODE_HEAD;
1309
e1a90ebd
AS		 1310 if (argp->minorversion >= 1)
1311 return nfserr_notsupp;
1312
1da177e4
LT		 1313 READ_BUF(12);
1314 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
06553991 1315 rlockowner->rl_owner.len = be32_to_cpup(p++);
1da177e4
LT		 1316 READ_BUF(rlockowner->rl_owner.len);
1317 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1318
60adfc50
AA		 1319 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1320 return nfserr_inval;
1da177e4
LT		 1321 DECODE_TAIL;
1322}
1323
2db134eb
AA		 1324static __be32
1325nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1326 struct nfsd4_exchange_id *exid)
2db134eb 1327{
5afa040b 1328 int dummy, tmp;
0733d213
AA		 1329 DECODE_HEAD;
1330
1331 READ_BUF(NFS4_VERIFIER_SIZE);
1332 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1333
a084daf5
BF		 1334 status = nfsd4_decode_opaque(argp, &exid->clname);
1335 if (status)
1336 return nfserr_bad_xdr;
0733d213
AA		 1337
1338 READ_BUF(4);
06553991 1339 exid->flags = be32_to_cpup(p++);
0733d213
AA		 1340
1341 /* Ignore state_protect4_a */
1342 READ_BUF(4);
06553991 1343 exid->spa_how = be32_to_cpup(p++);
0733d213
AA		 1344 switch (exid->spa_how) {
1345 case SP4_NONE:
1346 break;
1347 case SP4_MACH_CRED:
1348 /* spo_must_enforce */
ed941643
AE		 1349 status = nfsd4_decode_bitmap(argp,
1350 exid->spo_must_enforce);
1351 if (status)
1352 goto out;
0733d213 1353 /* spo_must_allow */
ed941643
AE		 1354 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
1355 if (status)
1356 goto out;
0733d213
AA		 1357 break;
1358 case SP4_SSV:
1359 /* ssp_ops */
1360 READ_BUF(4);
06553991 1361 dummy = be32_to_cpup(p++);
0733d213
AA		 1362 READ_BUF(dummy * 4);
1363 p += dummy;
1364
1365 READ_BUF(4);
06553991 1366 dummy = be32_to_cpup(p++);
0733d213
AA		 1367 READ_BUF(dummy * 4);
1368 p += dummy;
1369
1370 /* ssp_hash_algs<> */
1371 READ_BUF(4);
06553991 1372 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1373 while (tmp--) {
1374 READ_BUF(4);
06553991 1375 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1376 READ_BUF(dummy);
1377 p += XDR_QUADLEN(dummy);
1378 }
0733d213
AA		 1379
1380 /* ssp_encr_algs<> */
1381 READ_BUF(4);
06553991 1382 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1383 while (tmp--) {
1384 READ_BUF(4);
06553991 1385 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1386 READ_BUF(dummy);
1387 p += XDR_QUADLEN(dummy);
1388 }
0733d213
AA		 1389
1390 /* ssp_window and ssp_num_gss_handles */
1391 READ_BUF(8);
06553991
BF		 1392 dummy = be32_to_cpup(p++);
1393 dummy = be32_to_cpup(p++);
0733d213
AA		 1394 break;
1395 default:
1396 goto xdr_error;
1397 }
1398
1399 /* Ignore Implementation ID */
1400 READ_BUF(4); /* nfs_impl_id4 array length */
06553991 1401 dummy = be32_to_cpup(p++);
0733d213
AA		 1402
1403 if (dummy > 1)
1404 goto xdr_error;
1405
1406 if (dummy == 1) {
1407 /* nii_domain */
1408 READ_BUF(4);
06553991 1409 dummy = be32_to_cpup(p++);
0733d213
AA		 1410 READ_BUF(dummy);
1411 p += XDR_QUADLEN(dummy);
1412
1413 /* nii_name */
1414 READ_BUF(4);
06553991 1415 dummy = be32_to_cpup(p++);
0733d213
AA		 1416 READ_BUF(dummy);
1417 p += XDR_QUADLEN(dummy);
1418
1419 /* nii_date */
1420 READ_BUF(12);
1421 p += 3;
1422 }
1423 DECODE_TAIL;
2db134eb
AA		 1424}
1425
1426static __be32
1427nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1428 struct nfsd4_create_session *sess)
1429{
ec6b5d7b 1430 DECODE_HEAD;
ec6b5d7b 1431 u32 dummy;
ec6b5d7b
AA		 1432
1433 READ_BUF(16);
1434 COPYMEM(&sess->clientid, 8);
06553991
BF		 1435 sess->seqid = be32_to_cpup(p++);
1436 sess->flags = be32_to_cpup(p++);
ec6b5d7b
AA		 1437
1438 /* Fore channel attrs */
1439 READ_BUF(28);
06553991
BF		 1440 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1441 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1442 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1443 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1444 sess->fore_channel.maxops = be32_to_cpup(p++);
1445 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1446 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1447 if (sess->fore_channel.nr_rdma_attrs == 1) {
1448 READ_BUF(4);
06553991 1449 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1450 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1451 dprintk("Too many fore channel attr bitmaps!\n");
1452 goto xdr_error;
1453 }
1454
1455 /* Back channel attrs */
1456 READ_BUF(28);
06553991
BF		 1457 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1458 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1459 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1460 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1461 sess->back_channel.maxops = be32_to_cpup(p++);
1462 sess->back_channel.maxreqs = be32_to_cpup(p++);
1463 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1464 if (sess->back_channel.nr_rdma_attrs == 1) {
1465 READ_BUF(4);
06553991 1466 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1467 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1468 dprintk("Too many back channel attr bitmaps!\n");
1469 goto xdr_error;
1470 }
1471
acb2887e 1472 READ_BUF(4);
06553991 1473 sess->callback_prog = be32_to_cpup(p++);
acb2887e 1474 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1475 DECODE_TAIL;
2db134eb
AA		 1476}
1477
1478static __be32
1479nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1480 struct nfsd4_destroy_session *destroy_session)
1481{
e10e0cfc
BH		 1482 DECODE_HEAD;
1483 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1484 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1485
1486 DECODE_TAIL;
2db134eb
AA		 1487}
1488
e1ca12df
BS		 1489static __be32
1490nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1491 struct nfsd4_free_stateid *free_stateid)
1492{
1493 DECODE_HEAD;
1494
1495 READ_BUF(sizeof(stateid_t));
06553991 1496 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
e1ca12df
BS		 1497 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1498
1499 DECODE_TAIL;
1500}
1501
2db134eb
AA		 1502static __be32
1503nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1504 struct nfsd4_sequence *seq)
1505{
b85d4c01
BH		 1506 DECODE_HEAD;
1507
1508 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1509 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991
BF		 1510 seq->seqid = be32_to_cpup(p++);
1511 seq->slotid = be32_to_cpup(p++);
1512 seq->maxslots = be32_to_cpup(p++);
1513 seq->cachethis = be32_to_cpup(p++);
b85d4c01
BH		 1514
1515 DECODE_TAIL;
2db134eb
AA		 1516}
1517
17456804
BS		 1518static __be32
1519nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1520{
17456804 1521 int i;
03cfb420
BS		 1522 __be32 *p, status;
1523 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1524
1525 READ_BUF(4);
1526 test_stateid->ts_num_ids = ntohl(*p++);
1527
03cfb420 1528 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1529
1530 for (i = 0; i < test_stateid->ts_num_ids; i++) {
d5e23383 1531 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
03cfb420 1532 if (!stateid) {
afcf6792 1533 status = nfserrno(-ENOMEM);
03cfb420
BS		 1534 goto out;
1535 }
1536
03cfb420
BS		 1537 INIT_LIST_HEAD(&stateid->ts_id_list);
1538 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1539
1540 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1541 if (status)
03cfb420 1542 goto out;
17456804
BS		 1543 }
1544
1545 status = 0;
1546out:
1547 return status;
1548xdr_error:
1549 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1550 status = nfserr_bad_xdr;
1551 goto out;
1552}
1553
345c2842
MJ		 1554static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1555{
1556 DECODE_HEAD;
1557
1558 READ_BUF(8);
1559 COPYMEM(&dc->clientid, 8);
1560
1561 DECODE_TAIL;
1562}
1563
4dc6ec00
BF		 1564static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1565{
1566 DECODE_HEAD;
1567
1568 READ_BUF(4);
06553991 1569 rc->rca_one_fs = be32_to_cpup(p++);
4dc6ec00
BF		 1570
1571 DECODE_TAIL;
1572}
1573
9cf514cc
CH		 1574#ifdef CONFIG_NFSD_PNFS
1575static __be32
1576nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1577 struct nfsd4_getdeviceinfo *gdev)
1578{
1579 DECODE_HEAD;
1580 u32 num, i;
1581
1582 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1583 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1584 gdev->gd_layout_type = be32_to_cpup(p++);
1585 gdev->gd_maxcount = be32_to_cpup(p++);
1586 num = be32_to_cpup(p++);
1587 if (num) {
1588 READ_BUF(4 * num);
1589 gdev->gd_notify_types = be32_to_cpup(p++);
1590 for (i = 1; i < num; i++) {
1591 if (be32_to_cpup(p++)) {
1592 status = nfserr_inval;
1593 goto out;
1594 }
1595 }
1596 }
1597 DECODE_TAIL;
1598}
1599
1600static __be32
1601nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1602 struct nfsd4_layoutget *lgp)
1603{
1604 DECODE_HEAD;
1605
1606 READ_BUF(36);
1607 lgp->lg_signal = be32_to_cpup(p++);
1608 lgp->lg_layout_type = be32_to_cpup(p++);
1609 lgp->lg_seg.iomode = be32_to_cpup(p++);
1610 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1611 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1612 p = xdr_decode_hyper(p, &lgp->lg_minlength);
db59c0ef
KM		 1613
1614 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1615 if (status)
1616 return status;
1617
9cf514cc
CH		 1618 READ_BUF(4);
1619 lgp->lg_maxcount = be32_to_cpup(p++);
1620
1621 DECODE_TAIL;
1622}
1623
1624static __be32
1625nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1626 struct nfsd4_layoutcommit *lcp)
1627{
1628 DECODE_HEAD;
1629 u32 timechange;
1630
1631 READ_BUF(20);
1632 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1633 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1634 lcp->lc_reclaim = be32_to_cpup(p++);
db59c0ef
KM		 1635
1636 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1637 if (status)
1638 return status;
1639
9cf514cc
CH		 1640 READ_BUF(4);
1641 lcp->lc_newoffset = be32_to_cpup(p++);
1642 if (lcp->lc_newoffset) {
1643 READ_BUF(8);
1644 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1645 } else
1646 lcp->lc_last_wr = 0;
1647 READ_BUF(4);
1648 timechange = be32_to_cpup(p++);
1649 if (timechange) {
1650 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1651 if (status)
1652 return status;
1653 } else {
1654 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1655 }
1656 READ_BUF(8);
1657 lcp->lc_layout_type = be32_to_cpup(p++);
1658
1659 /*
1660 * Save the layout update in XDR format and let the layout driver deal
1661 * with it later.
1662 */
1663 lcp->lc_up_len = be32_to_cpup(p++);
1664 if (lcp->lc_up_len > 0) {
1665 READ_BUF(lcp->lc_up_len);
1666 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1667 }
1668
1669 DECODE_TAIL;
1670}
1671
1672static __be32
1673nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1674 struct nfsd4_layoutreturn *lrp)
1675{
1676 DECODE_HEAD;
1677
1678 READ_BUF(16);
1679 lrp->lr_reclaim = be32_to_cpup(p++);
1680 lrp->lr_layout_type = be32_to_cpup(p++);
1681 lrp->lr_seg.iomode = be32_to_cpup(p++);
1682 lrp->lr_return_type = be32_to_cpup(p++);
1683 if (lrp->lr_return_type == RETURN_FILE) {
1684 READ_BUF(16);
1685 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1686 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
db59c0ef
KM		 1687
1688 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1689 if (status)
1690 return status;
1691
9cf514cc
CH		 1692 READ_BUF(4);
1693 lrp->lrf_body_len = be32_to_cpup(p++);
1694 if (lrp->lrf_body_len > 0) {
1695 READ_BUF(lrp->lrf_body_len);
1696 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1697 }
1698 } else {
1699 lrp->lr_seg.offset = 0;
1700 lrp->lr_seg.length = NFS4_MAX_UINT64;
1701 }
1702
1703 DECODE_TAIL;
1704}
1705#endif /* CONFIG_NFSD_PNFS */
1706
95d871f0
AS		 1707static __be32
1708nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1709 struct nfsd4_fallocate *fallocate)
1710{
1711 DECODE_HEAD;
1712
1713 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1714 if (status)
1715 return status;
1716
1717 READ_BUF(16);
1718 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1719 xdr_decode_hyper(p, &fallocate->falloc_length);
1720
1721 DECODE_TAIL;
1722}
1723
ffa0160a
CH		 1724static __be32
1725nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1726{
1727 DECODE_HEAD;
1728
1729 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1730 if (status)
1731 return status;
1732 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1733 if (status)
1734 return status;
1735
1736 READ_BUF(8 + 8 + 8);
1737 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1738 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1739 p = xdr_decode_hyper(p, &clone->cl_count);
1740 DECODE_TAIL;
1741}
1742
29ae7f9d
AS		 1743static __be32
1744nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1745{
1746 DECODE_HEAD;
1747 unsigned int tmp;
1748
1749 status = nfsd4_decode_stateid(argp, &copy->cp_src_stateid);
1750 if (status)
1751 return status;
1752 status = nfsd4_decode_stateid(argp, &copy->cp_dst_stateid);
1753 if (status)
1754 return status;
1755
1756 READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
1757 p = xdr_decode_hyper(p, &copy->cp_src_pos);
1758 p = xdr_decode_hyper(p, &copy->cp_dst_pos);
1759 p = xdr_decode_hyper(p, &copy->cp_count);
edcc8452 1760 p++; /* ca_consecutive: we always do consecutive copies */
29ae7f9d
AS		 1761 copy->cp_synchronous = be32_to_cpup(p++);
1762 tmp = be32_to_cpup(p); /* Source server list not supported */
1763
1764 DECODE_TAIL;
1765}
1766
24bab491
AS		 1767static __be32
1768nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1769{
1770 DECODE_HEAD;
1771
1772 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1773 if (status)
1774 return status;
1775
1776 READ_BUF(8 + 4);
1777 p = xdr_decode_hyper(p, &seek->seek_offset);
1778 seek->seek_whence = be32_to_cpup(p);
1779
1780 DECODE_TAIL;
1781}
1782
347e0ad9
BH		 1783static __be32
1784nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1785{
1786 return nfs_ok;
1787}
1788
3c375c6f
BH		 1789static __be32
1790nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1791{
1e685ec2 1792 return nfserr_notsupp;
3c375c6f
BH		 1793}
1794
347e0ad9
BH		 1795typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1796
c1df609d 1797static const nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1798 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1799 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1800 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1801 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1802 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1803 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1804 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1805 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1806 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1807 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1808 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1809 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1810 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1811 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1812 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1813 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1814 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1815 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1816 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1817 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1818 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1819 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1820 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1821 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1822 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1823 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1824 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1825 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1826 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1827 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1828 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1829 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1830 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1831 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1832 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1833 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1834 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1835
1836 /* new operations for NFSv4.1 */
cb73a9f4 1837 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1838 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1839 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1840 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1841 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1842 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae 1843 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc
CH		 1844#ifdef CONFIG_NFSD_PNFS
1845 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1846 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1847 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1848 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1849 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1850#else
9064caae
RD		 1851 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1852 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1853 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1854 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1855 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc 1856#endif
04f4ad16 1857 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1858 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1859 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1860 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1861 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1862 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1863 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
87a15a80
AS		 1864
1865 /* new operations for NFSv4.2 */
95d871f0 1866 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
29ae7f9d 1867 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
87a15a80 1868 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
b0cb9085 1869 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
87a15a80
AS		 1870 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1871 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1872 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1873 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1874 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1875 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
24bab491 1876 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
87a15a80 1877 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
ffa0160a 1878 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
2db134eb
AA		 1879};
1880
e1a90ebd
AS		 1881static inline bool
1882nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1883{
8217d146 1884 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1885 return false;
8217d146 1886 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1887 return false;
8217d146
AS		 1888 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1889 return false;
1890 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1891 return false;
1892 return true;
1893}
f2feb96b 1894
b37ad28b 1895static __be32
1da177e4
LT		 1896nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1897{
1898 DECODE_HEAD;
1899 struct nfsd4_op *op;
1091006c 1900 bool cachethis = false;
a5cddc88
BF		 1901 int auth_slack= argp->rqstp->rq_auth_slack;
1902 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 1903 int readcount = 0;
1904 int readbytes = 0;
1da177e4
LT		 1905 int i;
1906
1da177e4 1907 READ_BUF(4);
06553991 1908 argp->taglen = be32_to_cpup(p++);
4aed9c46 1909 READ_BUF(argp->taglen);
1da177e4 1910 SAVEMEM(argp->tag, argp->taglen);
4aed9c46 1911 READ_BUF(8);
06553991
BF		 1912 argp->minorversion = be32_to_cpup(p++);
1913 argp->opcnt = be32_to_cpup(p++);
4f0cefbf 1914 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 1915
1916 if (argp->taglen > NFSD4_MAX_TAGLEN)
1917 goto xdr_error;
0078117c
BF		 1918 /*
1919 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
1920 * here, so we return success at the xdr level so that
1921 * nfsd4_proc can handle this is an NFS-level error.
1922 */
1923 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
1924 return 0;
1da177e4 1925
e8c96f8c 1926 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
5d6031ca 1927 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1da177e4
LT		 1928 if (!argp->ops) {
1929 argp->ops = argp->iops;
817cb9d4 1930 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1931 goto xdr_error;
1932 }
1933 }
1934
e1a90ebd 1935 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1936 argp->opcnt = 0;
1937
1da177e4
LT		 1938 for (i = 0; i < argp->opcnt; i++) {
1939 op = &argp->ops[i];
1940 op->replay = NULL;
1941
8a61b18c 1942 READ_BUF(4);
06553991 1943 op->opnum = be32_to_cpup(p++);
1da177e4 1944
e1a90ebd
AS		 1945 if (nfsd4_opnum_in_range(argp, op))
1946 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1947 else {
1da177e4
LT		 1948 op->opnum = OP_ILLEGAL;
1949 op->status = nfserr_op_illegal;
1da177e4 1950 }
f4f9ef4a 1951 op->opdesc = OPDESC(op);
1091006c
BF		 1952 /*
1953 * We'll try to cache the result in the DRC if any one
1954 * op in the compound wants to be cached:
1955 */
1956 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 1957
b0e35fda
BF		 1958 if (op->opnum == OP_READ) {
1959 readcount++;
1960 readbytes += nfsd4_max_reply(argp->rqstp, op);
1961 } else
1962 max_reply += nfsd4_max_reply(argp->rqstp, op);
f7b43d0c 1963 /*
7323f0d2
KM		 1964 * OP_LOCK and OP_LOCKT may return a conflicting lock.
1965 * (Special case because it will just skip encoding this
1966 * if it runs out of xdr buffer space, and it is the only
1967 * operation that behaves this way.)
f7b43d0c 1968 */
7323f0d2 1969 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
f7b43d0c 1970 max_reply += NFS4_OPAQUE_LIMIT;
e372ba60
BF		 1971
1972 if (op->status) {
1973 argp->opcnt = i+1;
1974 break;
1975 }
1da177e4 1976 }
1091006c
BF		 1977 /* Sessions make the DRC unnecessary: */
1978 if (argp->minorversion)
1979 cachethis = false;
b0e35fda 1980 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 1981 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 1982
a5cddc88 1983 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
779fb0f3 1984 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
b0e35fda 1985
1da177e4
LT		 1986 DECODE_TAIL;
1987}
1da177e4 1988
b8800921
N		 1989static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
1990 struct svc_export *exp)
c654b8a9 1991{
b8800921
N		 1992 if (exp->ex_flags & NFSEXP_V4ROOT) {
1993 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
1994 *p++ = 0;
1995 } else if (IS_I_VERSION(inode)) {
39ca1bf6 1996 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
c654b8a9 1997 } else {
d05d5744
BF		 1998 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1999 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
c654b8a9 2000 }
d05d5744 2001 return p;
c654b8a9
BF		 2002}
2003
d05d5744 2004static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 2005{
d05d5744 2006 *p++ = cpu_to_be32(c->atomic);
c654b8a9 2007 if (c->change_supported) {
d05d5744
BF		 2008 p = xdr_encode_hyper(p, c->before_change);
2009 p = xdr_encode_hyper(p, c->after_change);
c654b8a9 2010 } else {
d05d5744
BF		 2011 *p++ = cpu_to_be32(c->before_ctime_sec);
2012 *p++ = cpu_to_be32(c->before_ctime_nsec);
2013 *p++ = cpu_to_be32(c->after_ctime_sec);
2014 *p++ = cpu_to_be32(c->after_ctime_nsec);
c654b8a9 2015 }
d05d5744 2016 return p;
c654b8a9 2017}
1da177e4 2018
81c3f413 2019/* Encode as an array of strings the string given with components
e7a0444a 2020 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 2021 */
ddd1ea56
BF		 2022static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2023 char *components, char esc_enter,
2024 char esc_exit)
81c3f413 2025{
ddd1ea56 2026 __be32 *p;
082d4bd7
BF		 2027 __be32 pathlen;
2028 int pathlen_offset;
81c3f413 2029 int strlen, count=0;
e7a0444a 2030 char *str, *end, *next;
81c3f413
BF		 2031
2032 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 2033
2034 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 2035 p = xdr_reserve_space(xdr, 4);
2036 if (!p)
81c3f413 2037 return nfserr_resource;
082d4bd7
BF		 2038 p++; /* We will fill this in with @count later */
2039
81c3f413
BF		 2040 end = str = components;
2041 while (*end) {
e7a0444a
WAA		 2042 bool found_esc = false;
2043
2044 /* try to parse as esc_start, ..., esc_end, sep */
2045 if (*str == esc_enter) {
2046 for (; *end && (*end != esc_exit); end++)
2047 /* find esc_exit or end of string */;
2048 next = end + 1;
2049 if (*end && (!*next || *next == sep)) {
2050 str++;
2051 found_esc = true;
2052 }
2053 }
2054
2055 if (!found_esc)
2056 for (; *end && (*end != sep); end++)
2057 /* find sep or end of string */;
2058
81c3f413
BF		 2059 strlen = end - str;
2060 if (strlen) {
ddd1ea56
BF		 2061 p = xdr_reserve_space(xdr, strlen + 4);
2062 if (!p)
81c3f413 2063 return nfserr_resource;
0c0c267b 2064 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 2065 count++;
2066 }
2067 else
2068 end++;
5a64e569
BC		 2069 if (found_esc)
2070 end = next;
2071
81c3f413
BF		 2072 str = end;
2073 }
bf7491f1 2074 pathlen = htonl(count);
082d4bd7 2075 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 2076 return 0;
2077}
2078
e7a0444a
WAA		 2079/* Encode as an array of strings the string given with components
2080 * separated @sep.
2081 */
ddd1ea56
BF		 2082static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2083 char *components)
e7a0444a 2084{
ddd1ea56 2085 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 2086}
2087
81c3f413
BF		 2088/*
2089 * encode a location element of a fs_locations structure
2090 */
ddd1ea56
BF		 2091static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2092 struct nfsd4_fs_location *location)
81c3f413 2093{
b37ad28b 2094 __be32 status;
81c3f413 2095
ddd1ea56 2096 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 2097 '[', ']');
81c3f413
BF		 2098 if (status)
2099 return status;
ddd1ea56 2100 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 2101 if (status)
2102 return status;
81c3f413
BF		 2103 return 0;
2104}
2105
2106/*
ed748aac 2107 * Encode a path in RFC3530 'pathname4' format
81c3f413 2108 */
ddd1ea56
BF		 2109static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2110 const struct path *root,
2111 const struct path *path)
81c3f413 2112{
301f0268 2113 struct path cur = *path;
ddd1ea56 2114 __be32 *p;
ed748aac
TM		 2115 struct dentry **components = NULL;
2116 unsigned int ncomponents = 0;
2117 __be32 err = nfserr_jukebox;
81c3f413 2118
ed748aac 2119 dprintk("nfsd4_encode_components(");
81c3f413 2120
ed748aac
TM		 2121 path_get(&cur);
2122 /* First walk the path up to the nfsd root, and store the
2123 * dentries/path components in an array.
2124 */
2125 for (;;) {
b77a4b2e 2126 if (path_equal(&cur, root))
ed748aac
TM		 2127 break;
2128 if (cur.dentry == cur.mnt->mnt_root) {
2129 if (follow_up(&cur))
2130 continue;
2131 goto out_free;
2132 }
2133 if ((ncomponents & 15) == 0) {
2134 struct dentry **new;
2135 new = krealloc(components,
2136 sizeof(*new) * (ncomponents + 16),
2137 GFP_KERNEL);
2138 if (!new)
2139 goto out_free;
2140 components = new;
2141 }
2142 components[ncomponents++] = cur.dentry;
2143 cur.dentry = dget_parent(cur.dentry);
2144 }
ddd1ea56
BF		 2145 err = nfserr_resource;
2146 p = xdr_reserve_space(xdr, 4);
2147 if (!p)
ed748aac 2148 goto out_free;
c373b0a4 2149 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 2150
2151 while (ncomponents) {
2152 struct dentry *dentry = components[ncomponents - 1];
301f0268 2153 unsigned int len;
ed748aac 2154
301f0268
AV		 2155 spin_lock(&dentry->d_lock);
2156 len = dentry->d_name.len;
ddd1ea56
BF		 2157 p = xdr_reserve_space(xdr, len + 4);
2158 if (!p) {
301f0268 2159 spin_unlock(&dentry->d_lock);
ed748aac 2160 goto out_free;
301f0268 2161 }
0c0c267b 2162 p = xdr_encode_opaque(p, dentry->d_name.name, len);
a455589f 2163 dprintk("/%pd", dentry);
301f0268 2164 spin_unlock(&dentry->d_lock);
ed748aac
TM		 2165 dput(dentry);
2166 ncomponents--;
81c3f413 2167 }
ed748aac 2168
ed748aac
TM		 2169 err = 0;
2170out_free:
2171 dprintk(")\n");
2172 while (ncomponents)
2173 dput(components[--ncomponents]);
2174 kfree(components);
2175 path_put(&cur);
2176 return err;
2177}
2178
ddd1ea56
BF		 2179static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2180 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 2181{
2182 struct svc_export *exp_ps;
2183 __be32 res;
2184
2185 exp_ps = rqst_find_fsidzero_export(rqstp);
2186 if (IS_ERR(exp_ps))
2187 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 2188 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 2189 exp_put(exp_ps);
2190 return res;
81c3f413
BF		 2191}
2192
2193/*
2194 * encode a fs_locations structure
2195 */
ddd1ea56
BF		 2196static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2197 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 2198{
b37ad28b 2199 __be32 status;
cc45f017 2200 int i;
ddd1ea56 2201 __be32 *p;
81c3f413 2202 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 2203
ddd1ea56 2204 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 2205 if (status)
2206 return status;
ddd1ea56
BF		 2207 p = xdr_reserve_space(xdr, 4);
2208 if (!p)
81c3f413 2209 return nfserr_resource;
c373b0a4 2210 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 2211 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 2212 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 2213 if (status)
2214 return status;
2215 }
81c3f413
BF		 2216 return 0;
2217}
1da177e4 2218
3d2544b1
BF		 2219static u32 nfs4_file_type(umode_t mode)
2220{
2221 switch (mode & S_IFMT) {
2222 case S_IFIFO: return NF4FIFO;
2223 case S_IFCHR: return NF4CHR;
2224 case S_IFDIR: return NF4DIR;
2225 case S_IFBLK: return NF4BLK;
2226 case S_IFLNK: return NF4LNK;
2227 case S_IFREG: return NF4REG;
2228 case S_IFSOCK: return NF4SOCK;
2229 default: return NF4BAD;
2230 };
2231}
1da177e4 2232
b37ad28b 2233static inline __be32
ddd1ea56
BF		 2234nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2235 struct nfs4_ace *ace)
1da177e4 2236{
3554116d 2237 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 2238 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 2239 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 2240 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 2241 else
ddd1ea56 2242 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 2243}
2244
6896f15a 2245static inline __be32
8a4c3926 2246nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
6896f15a 2247{
8a4c3926
JL		 2248 __be32 *p;
2249 unsigned long i = hweight_long(layout_types);
6896f15a 2250
8a4c3926
JL		 2251 p = xdr_reserve_space(xdr, 4 + 4 * i);
2252 if (!p)
2253 return nfserr_resource;
2254
2255 *p++ = cpu_to_be32(i);
2256
2257 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2258 if (layout_types & (1 << i))
2259 *p++ = cpu_to_be32(i);
6896f15a
KM		 2260
2261 return 0;
2262}
2263
42ca0993
BF		 2264#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2265 FATTR4_WORD0_RDATTR_ERROR)
2266#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
c2227a39 2267#define WORD2_ABSENT_FS_ATTRS 0
42ca0993 2268
18032ca0
DQ		 2269#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2270static inline __be32
ddd1ea56
BF		 2271nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2272 void *context, int len)
18032ca0 2273{
ddd1ea56 2274 __be32 *p;
18032ca0 2275
ddd1ea56
BF		 2276 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2277 if (!p)
18032ca0
DQ		 2278 return nfserr_resource;
2279
2280 /*
2281 * For now we use a 0 here to indicate the null translation; in
2282 * the future we may place a call to translation code here.
2283 */
c373b0a4
BF		 2284 *p++ = cpu_to_be32(0); /* lfs */
2285 *p++ = cpu_to_be32(0); /* pi */
18032ca0 2286 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 2287 return 0;
2288}
2289#else
2290static inline __be32
ddd1ea56
BF		 2291nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2292 void *context, int len)
18032ca0
DQ		 2293{ return 0; }
2294#endif
2295
c2227a39 2296static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
42ca0993
BF		 2297{
2298 /* As per referral draft: */
2299 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2300 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2301 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2302 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2303 *rdattr_err = NFSERR_MOVED;
2304 else
2305 return nfserr_moved;
2306 }
2307 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2308 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
c2227a39 2309 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
42ca0993
BF		 2310 return 0;
2311}
1da177e4 2312
ae7095a7
BF		 2313
2314static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2315{
2316 struct path path = exp->ex_path;
2317 int err;
2318
2319 path_get(&path);
2320 while (follow_up(&path)) {
2321 if (path.dentry != path.mnt->mnt_root)
2322 break;
2323 }
a528d35e 2324 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
ae7095a7
BF		 2325 path_put(&path);
2326 return err;
2327}
2328
75976de6
KM		 2329static __be32
2330nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2331{
2332 __be32 *p;
2333
2334 if (bmval2) {
2335 p = xdr_reserve_space(xdr, 16);
2336 if (!p)
2337 goto out_resource;
2338 *p++ = cpu_to_be32(3);
2339 *p++ = cpu_to_be32(bmval0);
2340 *p++ = cpu_to_be32(bmval1);
2341 *p++ = cpu_to_be32(bmval2);
2342 } else if (bmval1) {
2343 p = xdr_reserve_space(xdr, 12);
2344 if (!p)
2345 goto out_resource;
2346 *p++ = cpu_to_be32(2);
2347 *p++ = cpu_to_be32(bmval0);
2348 *p++ = cpu_to_be32(bmval1);
2349 } else {
2350 p = xdr_reserve_space(xdr, 8);
2351 if (!p)
2352 goto out_resource;
2353 *p++ = cpu_to_be32(1);
2354 *p++ = cpu_to_be32(bmval0);
2355 }
2356
2357 return 0;
2358out_resource:
2359 return nfserr_resource;
2360}
2361
1da177e4
LT		 2362/*
2363 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2364 * ourselves.
1da177e4 2365 */
da2ebce6 2366static __be32
d5184658
BF		 2367nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2368 struct svc_export *exp,
2369 struct dentry *dentry, u32 *bmval,
406a7ea9 2370 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2371{
2372 u32 bmval0 = bmval[0];
2373 u32 bmval1 = bmval[1];
7e705706 2374 u32 bmval2 = bmval[2];
1da177e4 2375 struct kstat stat;
d50e6136 2376 struct svc_fh *tempfh = NULL;
1da177e4 2377 struct kstatfs statfs;
ddd1ea56 2378 __be32 *p;
1fcea5b2 2379 int starting_len = xdr->buf->len;
082d4bd7
BF		 2380 int attrlen_offset;
2381 __be32 attrlen;
1da177e4
LT		 2382 u32 dummy;
2383 u64 dummy64;
42ca0993 2384 u32 rdattr_err = 0;
b37ad28b 2385 __be32 status;
b8dd7b9a 2386 int err;
1da177e4 2387 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2388 void *context = NULL;
2389 int contextlen;
2390 bool contextsupport = false;
7e705706
AA		 2391 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2392 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2393 struct path path = {
2394 .mnt = exp->ex_path.mnt,
2395 .dentry = dentry,
2396 };
3d733711 2397 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2398
2399 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
916d2d84 2400 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
1da177e4 2401
42ca0993 2402 if (exp->ex_fslocs.migrated) {
c2227a39 2403 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
42ca0993
BF		 2404 if (status)
2405 goto out;
2406 }
2407
a528d35e 2408 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
b8dd7b9a 2409 if (err)
1da177e4 2410 goto out_nfserr;
12337901
CH		 2411 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2412 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2413 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2414 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2415 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2416 if (err)
1da177e4
LT		 2417 goto out_nfserr;
2418 }
2419 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2420 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2421 status = nfserr_jukebox;
2422 if (!tempfh)
2423 goto out;
2424 fh_init(tempfh, NFS4_FHSIZE);
2425 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2426 if (status)
2427 goto out;
d50e6136 2428 fhp = tempfh;
1da177e4 2429 }
0c9d65e7 2430 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2431 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
0c9d65e7
AG		 2432 if (err == -EOPNOTSUPP)
2433 bmval0 &= ~FATTR4_WORD0_ACL;
2434 else if (err == -EINVAL) {
2435 status = nfserr_attrnotsupp;
2436 goto out;
2437 } else if (err != 0)
2438 goto out_nfserr;
1da177e4 2439 }
1da177e4 2440
18032ca0 2441#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
c2227a39
KM		 2442 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2443 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
32ddd944
BF		 2444 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2445 err = security_inode_getsecctx(d_inode(dentry),
18032ca0 2446 &context, &contextlen);
32ddd944
BF		 2447 else
2448 err = -EOPNOTSUPP;
18032ca0
DQ		 2449 contextsupport = (err == 0);
2450 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2451 if (err == -EOPNOTSUPP)
2452 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2453 else if (err)
2454 goto out_nfserr;
2455 }
2456 }
2457#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2458
75976de6
KM		 2459 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2460 if (status)
2461 goto out;
082d4bd7
BF		 2462
2463 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2464 p = xdr_reserve_space(xdr, 4);
2465 if (!p)
2466 goto out_resource;
082d4bd7 2467 p++; /* to be backfilled later */
1da177e4
LT		 2468
2469 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
dcd20869
BF		 2470 u32 supp[3];
2471
2472 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
7e705706 2473
0c9d65e7 2474 if (!IS_POSIXACL(dentry->d_inode))
916d2d84 2475 supp[0] &= ~FATTR4_WORD0_ACL;
18032ca0 2476 if (!contextsupport)
916d2d84
BF		 2477 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2478 if (!supp[2]) {
ddd1ea56
BF		 2479 p = xdr_reserve_space(xdr, 12);
2480 if (!p)
2b44f1ba 2481 goto out_resource;
c373b0a4 2482 *p++ = cpu_to_be32(2);
916d2d84
BF		 2483 *p++ = cpu_to_be32(supp[0]);
2484 *p++ = cpu_to_be32(supp[1]);
7e705706 2485 } else {
ddd1ea56
BF		 2486 p = xdr_reserve_space(xdr, 16);
2487 if (!p)
2b44f1ba 2488 goto out_resource;
c373b0a4 2489 *p++ = cpu_to_be32(3);
916d2d84
BF		 2490 *p++ = cpu_to_be32(supp[0]);
2491 *p++ = cpu_to_be32(supp[1]);
2492 *p++ = cpu_to_be32(supp[2]);
7e705706 2493 }
1da177e4
LT		 2494 }
2495 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2496 p = xdr_reserve_space(xdr, 4);
2497 if (!p)
1da177e4 2498 goto out_resource;
3d2544b1 2499 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2500 if (dummy == NF4BAD) {
2501 status = nfserr_serverfault;
2502 goto out;
2503 }
c373b0a4 2504 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2505 }
2506 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2507 p = xdr_reserve_space(xdr, 4);
2508 if (!p)
1da177e4 2509 goto out_resource;
49640001 2510 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2511 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2512 else
c373b0a4
BF		 2513 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2514 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2515 }
2516 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2517 p = xdr_reserve_space(xdr, 8);
2518 if (!p)
1da177e4 2519 goto out_resource;
b8800921 2520 p = encode_change(p, &stat, d_inode(dentry), exp);
1da177e4
LT		 2521 }
2522 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2523 p = xdr_reserve_space(xdr, 8);
2524 if (!p)
1da177e4 2525 goto out_resource;
b64c7f3b 2526 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2527 }
2528 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2529 p = xdr_reserve_space(xdr, 4);
2530 if (!p)
1da177e4 2531 goto out_resource;
c373b0a4 2532 *p++ = cpu_to_be32(1);
1da177e4
LT		 2533 }
2534 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2535 p = xdr_reserve_space(xdr, 4);
2536 if (!p)
1da177e4 2537 goto out_resource;
c373b0a4 2538 *p++ = cpu_to_be32(1);
1da177e4
LT		 2539 }
2540 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2541 p = xdr_reserve_space(xdr, 4);
2542 if (!p)
1da177e4 2543 goto out_resource;
c373b0a4 2544 *p++ = cpu_to_be32(0);
1da177e4
LT		 2545 }
2546 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2547 p = xdr_reserve_space(xdr, 16);
2548 if (!p)
1da177e4 2549 goto out_resource;
42ca0993 2550 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 2551 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2552 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2553 } else switch(fsid_source(fhp)) {
2554 case FSIDSOURCE_FSID:
b64c7f3b
BF		 2555 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2556 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 2557 break;
2558 case FSIDSOURCE_DEV:
c373b0a4
BF		 2559 *p++ = cpu_to_be32(0);
2560 *p++ = cpu_to_be32(MAJOR(stat.dev));
2561 *p++ = cpu_to_be32(0);
2562 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 2563 break;
2564 case FSIDSOURCE_UUID:
94eb3689
KM		 2565 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2566 EX_UUID_LEN);
af6a4e28 2567 break;
1da177e4
LT		 2568 }
2569 }
2570 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2571 p = xdr_reserve_space(xdr, 4);
2572 if (!p)
1da177e4 2573 goto out_resource;
c373b0a4 2574 *p++ = cpu_to_be32(0);
1da177e4
LT		 2575 }
2576 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2577 p = xdr_reserve_space(xdr, 4);
2578 if (!p)
1da177e4 2579 goto out_resource;
c373b0a4 2580 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 2581 }
2582 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2583 p = xdr_reserve_space(xdr, 4);
2584 if (!p)
1da177e4 2585 goto out_resource;
c373b0a4 2586 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 2587 }
2588 if (bmval0 & FATTR4_WORD0_ACL) {
2589 struct nfs4_ace *ace;
1da177e4
LT		 2590
2591 if (acl == NULL) {
ddd1ea56
BF		 2592 p = xdr_reserve_space(xdr, 4);
2593 if (!p)
1da177e4
LT		 2594 goto out_resource;
2595
c373b0a4 2596 *p++ = cpu_to_be32(0);
1da177e4
LT		 2597 goto out_acl;
2598 }
ddd1ea56
BF		 2599 p = xdr_reserve_space(xdr, 4);
2600 if (!p)
1da177e4 2601 goto out_resource;
c373b0a4 2602 *p++ = cpu_to_be32(acl->naces);
1da177e4 2603
28e05dd8 2604 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2605 p = xdr_reserve_space(xdr, 4*3);
2606 if (!p)
1da177e4 2607 goto out_resource;
c373b0a4
BF		 2608 *p++ = cpu_to_be32(ace->type);
2609 *p++ = cpu_to_be32(ace->flag);
2610 *p++ = cpu_to_be32(ace->access_mask &
2611 NFS4_ACE_MASK_ALL);
ddd1ea56 2612 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2613 if (status)
2614 goto out;
2615 }
2616 }
2617out_acl:
2618 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2619 p = xdr_reserve_space(xdr, 4);
2620 if (!p)
1da177e4 2621 goto out_resource;
0c9d65e7 2622 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
1da177e4
LT		 2623 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2624 }
2625 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2626 p = xdr_reserve_space(xdr, 4);
2627 if (!p)
1da177e4 2628 goto out_resource;
c373b0a4 2629 *p++ = cpu_to_be32(1);
1da177e4
LT		 2630 }
2631 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2632 p = xdr_reserve_space(xdr, 4);
2633 if (!p)
1da177e4 2634 goto out_resource;
c373b0a4 2635 *p++ = cpu_to_be32(0);
1da177e4
LT		 2636 }
2637 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2638 p = xdr_reserve_space(xdr, 4);
2639 if (!p)
1da177e4 2640 goto out_resource;
c373b0a4 2641 *p++ = cpu_to_be32(1);
1da177e4
LT		 2642 }
2643 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2644 p = xdr_reserve_space(xdr, 4);
2645 if (!p)
1da177e4 2646 goto out_resource;
c373b0a4 2647 *p++ = cpu_to_be32(1);
1da177e4
LT		 2648 }
2649 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2650 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2651 if (!p)
1da177e4 2652 goto out_resource;
0c0c267b
BF		 2653 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2654 fhp->fh_handle.fh_size);
1da177e4
LT		 2655 }
2656 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2657 p = xdr_reserve_space(xdr, 8);
2658 if (!p)
1da177e4 2659 goto out_resource;
b64c7f3b 2660 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 2661 }
2662 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2663 p = xdr_reserve_space(xdr, 8);
2664 if (!p)
1da177e4 2665 goto out_resource;
b64c7f3b 2666 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2667 }
2668 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2669 p = xdr_reserve_space(xdr, 8);
2670 if (!p)
1da177e4 2671 goto out_resource;
b64c7f3b 2672 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2673 }
2674 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2675 p = xdr_reserve_space(xdr, 8);
2676 if (!p)
1da177e4 2677 goto out_resource;
b64c7f3b 2678 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 2679 }
81c3f413 2680 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2681 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2682 if (status)
2683 goto out;
2684 }
1da177e4 2685 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2686 p = xdr_reserve_space(xdr, 4);
2687 if (!p)
1da177e4 2688 goto out_resource;
c373b0a4 2689 *p++ = cpu_to_be32(1);
1da177e4
LT		 2690 }
2691 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2692 p = xdr_reserve_space(xdr, 8);
2693 if (!p)
1da177e4 2694 goto out_resource;
b64c7f3b 2695 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2696 }
2697 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2698 p = xdr_reserve_space(xdr, 4);
2699 if (!p)
1da177e4 2700 goto out_resource;
c373b0a4 2701 *p++ = cpu_to_be32(255);
1da177e4
LT		 2702 }
2703 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2704 p = xdr_reserve_space(xdr, 4);
2705 if (!p)
1da177e4 2706 goto out_resource;
c373b0a4 2707 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 2708 }
2709 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2710 p = xdr_reserve_space(xdr, 8);
2711 if (!p)
1da177e4 2712 goto out_resource;
b64c7f3b 2713 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2714 }
2715 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2716 p = xdr_reserve_space(xdr, 8);
2717 if (!p)
1da177e4 2718 goto out_resource;
b64c7f3b 2719 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2720 }
2721 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2722 p = xdr_reserve_space(xdr, 4);
2723 if (!p)
1da177e4 2724 goto out_resource;
c373b0a4 2725 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 2726 }
2727 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2728 p = xdr_reserve_space(xdr, 4);
2729 if (!p)
1da177e4 2730 goto out_resource;
c373b0a4 2731 *p++ = cpu_to_be32(1);
1da177e4
LT		 2732 }
2733 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2734 p = xdr_reserve_space(xdr, 4);
2735 if (!p)
1da177e4 2736 goto out_resource;
c373b0a4 2737 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 2738 }
2739 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2740 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2741 if (status)
2742 goto out;
2743 }
2744 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2745 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2746 if (status)
2747 goto out;
2748 }
2749 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2750 p = xdr_reserve_space(xdr, 8);
2751 if (!p)
1da177e4 2752 goto out_resource;
c373b0a4
BF		 2753 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2754 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 2755 }
2756 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2757 p = xdr_reserve_space(xdr, 8);
2758 if (!p)
1da177e4
LT		 2759 goto out_resource;
2760 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 2761 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2762 }
2763 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2764 p = xdr_reserve_space(xdr, 8);
2765 if (!p)
1da177e4
LT		 2766 goto out_resource;
2767 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 2768 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2769 }
2770 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2771 p = xdr_reserve_space(xdr, 8);
2772 if (!p)
1da177e4
LT		 2773 goto out_resource;
2774 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 2775 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2776 }
2777 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2778 p = xdr_reserve_space(xdr, 8);
2779 if (!p)
1da177e4
LT		 2780 goto out_resource;
2781 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 2782 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2783 }
2784 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2785 p = xdr_reserve_space(xdr, 12);
2786 if (!p)
1da177e4 2787 goto out_resource;
b64c7f3b 2788 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 2789 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 2790 }
2791 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2792 p = xdr_reserve_space(xdr, 12);
2793 if (!p)
1da177e4 2794 goto out_resource;
c373b0a4
BF		 2795 *p++ = cpu_to_be32(0);
2796 *p++ = cpu_to_be32(1);
2797 *p++ = cpu_to_be32(0);
1da177e4
LT		 2798 }
2799 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2800 p = xdr_reserve_space(xdr, 12);
2801 if (!p)
1da177e4 2802 goto out_resource;
b64c7f3b 2803 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 2804 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 2805 }
2806 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2807 p = xdr_reserve_space(xdr, 12);
2808 if (!p)
1da177e4 2809 goto out_resource;
b64c7f3b 2810 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 2811 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 2812 }
2813 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
0a2050d7
KM		 2814 struct kstat parent_stat;
2815 u64 ino = stat.ino;
2816
ddd1ea56
BF		 2817 p = xdr_reserve_space(xdr, 8);
2818 if (!p)
1da177e4 2819 goto out_resource;
406a7ea9
FF		 2820 /*
2821 * Get parent's attributes if not ignoring crossmount
2822 * and this is the root of a cross-mounted filesystem.
2823 */
2824 if (ignore_crossmnt == 0 &&
0a2050d7
KM		 2825 dentry == exp->ex_path.mnt->mnt_root) {
2826 err = get_parent_attributes(exp, &parent_stat);
2827 if (err)
2828 goto out_nfserr;
2829 ino = parent_stat.ino;
2830 }
2831 p = xdr_encode_hyper(p, ino);
1da177e4 2832 }
9cf514cc 2833#ifdef CONFIG_NFSD_PNFS
6896f15a 2834 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
8a4c3926 2835 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 2836 if (status)
2837 goto out;
2838 }
2839
2840 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
8a4c3926 2841 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
6896f15a
KM		 2842 if (status)
2843 goto out;
9cf514cc
CH		 2844 }
2845
2846 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2847 p = xdr_reserve_space(xdr, 4);
2848 if (!p)
2849 goto out_resource;
2850 *p++ = cpu_to_be32(stat.blksize);
2851 }
2852#endif /* CONFIG_NFSD_PNFS */
8c18f205 2853 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
b26b78cb
TM		 2854 u32 supp[3];
2855
2856 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2857 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
2858 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
2859 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
2860
2861 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
75976de6
KM		 2862 if (status)
2863 goto out;
8c18f205 2864 }
7e705706 2865
7d580722
KM		 2866 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2867 status = nfsd4_encode_security_label(xdr, rqstp, context,
2868 contextlen);
2869 if (status)
2870 goto out;
2871 }
2872
082d4bd7
BF		 2873 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2874 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2875 status = nfs_ok;
2876
2877out:
ba4e55bb 2878#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2879 if (context)
2880 security_release_secctx(context, contextlen);
ba4e55bb 2881#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2882 kfree(acl);
18df11d0 2883 if (tempfh) {
d50e6136 2884 fh_put(tempfh);
18df11d0
YZ		 2885 kfree(tempfh);
2886 }
1fcea5b2
BF		 2887 if (status)
2888 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2889 return status;
2890out_nfserr:
b8dd7b9a 2891 status = nfserrno(err);
1da177e4
LT		 2892 goto out;
2893out_resource:
1da177e4
LT		 2894 status = nfserr_resource;
2895 goto out;
1da177e4
LT		 2896}
2897
2825a7f9
BF		 2898static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2899 struct xdr_buf *buf, __be32 *p, int bytes)
2900{
2901 xdr->scratch.iov_len = 0;
2902 memset(buf, 0, sizeof(struct xdr_buf));
2903 buf->head[0].iov_base = p;
2904 buf->head[0].iov_len = 0;
2905 buf->len = 0;
2906 xdr->buf = buf;
2907 xdr->iov = buf->head;
2908 xdr->p = p;
2909 xdr->end = (void *)p + bytes;
2910 buf->buflen = bytes;
2911}
2912
d5184658
BF		 2913__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2914 struct svc_fh *fhp, struct svc_export *exp,
2915 struct dentry *dentry, u32 *bmval,
2916 struct svc_rqst *rqstp, int ignore_crossmnt)
2917{
2825a7f9 2918 struct xdr_buf dummy;
d5184658
BF		 2919 struct xdr_stream xdr;
2920 __be32 ret;
2921
2825a7f9 2922 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2923 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2924 ignore_crossmnt);
2925 *p = xdr.p;
2926 return ret;
2927}
2928
c0ce6ec8
BF		 2929static inline int attributes_need_mount(u32 *bmval)
2930{
2931 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2932 return 1;
2933 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2934 return 1;
2935 return 0;
2936}
2937
b37ad28b 2938static __be32
561f0ed4
BF		 2939nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2940 const char *name, int namlen)
1da177e4
LT		 2941{
2942 struct svc_export *exp = cd->rd_fhp->fh_export;
2943 struct dentry *dentry;
b37ad28b 2944 __be32 nfserr;
406a7ea9 2945 int ignore_crossmnt = 0;
1da177e4 2946
bbddca8e 2947 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
1da177e4
LT		 2948 if (IS_ERR(dentry))
2949 return nfserrno(PTR_ERR(dentry));
2b0143b5 2950 if (d_really_is_negative(dentry)) {
b2c0cea6 2951 /*
bbddca8e
N		 2952 * we're not holding the i_mutex here, so there's
2953 * a window where this directory entry could have gone
2954 * away.
b2c0cea6
BF		 2955 */
2956 dput(dentry);
2957 return nfserr_noent;
2958 }
1da177e4
LT		 2959
2960 exp_get(exp);
406a7ea9
FF		 2961 /*
2962 * In the case of a mountpoint, the client may be asking for
2963 * attributes that are only properties of the underlying filesystem
2964 * as opposed to the cross-mounted file system. In such a case,
2965 * we will not follow the cross mount and will fill the attribtutes
2966 * directly from the mountpoint dentry.
2967 */
3227fa41 2968 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2969 int err;
2970
3227fa41
BF		 2971 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2972 && !attributes_need_mount(cd->rd_bmval)) {
2973 ignore_crossmnt = 1;
2974 goto out_encode;
2975 }
dcb488a3
AA		 2976 /*
2977 * Why the heck aren't we just using nfsd_lookup??
2978 * Different "."/".." handling? Something else?
2979 * At least, add a comment here to explain....
2980 */
021d3a72
BF		 2981 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2982 if (err) {
2983 nfserr = nfserrno(err);
1da177e4
LT		 2984 goto out_put;
2985 }
dcb488a3
AA		 2986 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2987 if (nfserr)
2988 goto out_put;
1da177e4
LT		 2989
2990 }
3227fa41 2991out_encode:
561f0ed4 2992 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 2993 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2994out_put:
2995 dput(dentry);
2996 exp_put(exp);
2997 return nfserr;
2998}
2999
2ebbc012 3000static __be32 *
561f0ed4 3001nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 3002{
561f0ed4
BF		 3003 __be32 *p;
3004
c3a45617 3005 p = xdr_reserve_space(xdr, 20);
561f0ed4 3006 if (!p)
1da177e4
LT		 3007 return NULL;
3008 *p++ = htonl(2);
3009 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
3010 *p++ = htonl(0); /* bmval1 */
3011
87915c64 3012 *p++ = htonl(4); /* attribute length */
1da177e4 3013 *p++ = nfserr; /* no htonl */
1da177e4
LT		 3014 return p;
3015}
3016
3017static int
a0ad13ef
N		 3018nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3019 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 3020{
a0ad13ef 3021 struct readdir_cd *ccd = ccdv;
1da177e4 3022 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 3023 struct xdr_stream *xdr = cd->xdr;
3024 int start_offset = xdr->buf->len;
3025 int cookie_offset;
aee37764 3026 u32 name_and_cookie;
561f0ed4 3027 int entry_bytes;
b37ad28b 3028 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 3029 __be64 wire_offset;
3030 __be32 *p;
1da177e4
LT		 3031
3032 /* In nfsv4, "." and ".." never make it onto the wire.. */
3033 if (name && isdotent(name, namlen)) {
3034 cd->common.err = nfs_ok;
3035 return 0;
3036 }
3037
561f0ed4
BF		 3038 if (cd->cookie_offset) {
3039 wire_offset = cpu_to_be64(offset);
3040 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3041 &wire_offset, 8);
3042 }
1da177e4 3043
561f0ed4
BF		 3044 p = xdr_reserve_space(xdr, 4);
3045 if (!p)
1da177e4 3046 goto fail;
1da177e4 3047 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 3048 cookie_offset = xdr->buf->len;
3049 p = xdr_reserve_space(xdr, 3*4 + namlen);
3050 if (!p)
3051 goto fail;
1da177e4
LT		 3052 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
3053 p = xdr_encode_array(p, name, namlen); /* name length & name */
3054
561f0ed4 3055 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 3056 switch (nfserr) {
3057 case nfs_ok:
1da177e4
LT		 3058 break;
3059 case nfserr_resource:
3060 nfserr = nfserr_toosmall;
3061 goto fail;
b2c0cea6 3062 case nfserr_noent:
f41c5ad2 3063 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 3064 goto skip_entry;
1da177e4
LT		 3065 default:
3066 /*
3067 * If the client requested the RDATTR_ERROR attribute,
3068 * we stuff the error code into this attribute
3069 * and continue. If this attribute was not requested,
3070 * then in accordance with the spec, we fail the
3071 * entire READDIR operation(!)
3072 */
3073 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3074 goto fail;
561f0ed4 3075 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 3076 if (p == NULL) {
3077 nfserr = nfserr_toosmall;
1da177e4 3078 goto fail;
34081efc 3079 }
1da177e4 3080 }
561f0ed4
BF		 3081 nfserr = nfserr_toosmall;
3082 entry_bytes = xdr->buf->len - start_offset;
3083 if (entry_bytes > cd->rd_maxcount)
3084 goto fail;
3085 cd->rd_maxcount -= entry_bytes;
aee37764
BF		 3086 /*
3087 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3088 * let's always let through the first entry, at least:
3089 */
0ec016e3
BF		 3090 if (!cd->rd_dircount)
3091 goto fail;
3092 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
aee37764
BF		 3093 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3094 goto fail;
3095 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
0ec016e3 3096
561f0ed4 3097 cd->cookie_offset = cookie_offset;
b2c0cea6 3098skip_entry:
1da177e4
LT		 3099 cd->common.err = nfs_ok;
3100 return 0;
3101fail:
561f0ed4 3102 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 3103 cd->common.err = nfserr;
3104 return -EINVAL;
3105}
3106
d0a381dd
BF		 3107static __be32
3108nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 3109{
bc749ca4 3110 __be32 *p;
e2f282b9 3111
d0a381dd
BF		 3112 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3113 if (!p)
3114 return nfserr_resource;
c373b0a4 3115 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 3116 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3117 sizeof(stateid_opaque_t));
d0a381dd 3118 return 0;
e2f282b9
BH		 3119}
3120
695e12f8 3121static __be32
b37ad28b 3122nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 3123{
d0a381dd 3124 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3125 __be32 *p;
1da177e4 3126
bac966d6
BF		 3127 p = xdr_reserve_space(xdr, 8);
3128 if (!p)
3129 return nfserr_resource;
3130 *p++ = cpu_to_be32(access->ac_supported);
3131 *p++ = cpu_to_be32(access->ac_resp_access);
3132 return 0;
1da177e4
LT		 3133}
3134
1d1bc8f2
BF		 3135static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3136{
d0a381dd 3137 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 3138 __be32 *p;
3139
bac966d6
BF		 3140 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3141 if (!p)
3142 return nfserr_resource;
3143 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3144 NFS4_MAX_SESSIONID_LEN);
3145 *p++ = cpu_to_be32(bcts->dir);
3146 /* Upshifting from TCP to RDMA is not supported */
3147 *p++ = cpu_to_be32(0);
3148 return 0;
1d1bc8f2
BF		 3149}
3150
695e12f8 3151static __be32
b37ad28b 3152nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 3153{
d0a381dd
BF		 3154 struct xdr_stream *xdr = &resp->xdr;
3155
bac966d6 3156 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
1da177e4
LT		 3157}
3158
3159
695e12f8 3160static __be32
b37ad28b 3161nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 3162{
d0a381dd 3163 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3164 __be32 *p;
1da177e4 3165
bac966d6
BF		 3166 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3167 if (!p)
3168 return nfserr_resource;
3169 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
0c0c267b 3170 NFS4_VERIFIER_SIZE);
bac966d6 3171 return 0;
1da177e4
LT		 3172}
3173
695e12f8 3174static __be32
b37ad28b 3175nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 3176{
d0a381dd 3177 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3178 __be32 *p;
1da177e4 3179
bac966d6
BF		 3180 p = xdr_reserve_space(xdr, 20);
3181 if (!p)
3182 return nfserr_resource;
3183 encode_cinfo(p, &create->cr_cinfo);
3184 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3185 create->cr_bmval[1], create->cr_bmval[2]);
3186 return 0;
1da177e4
LT		 3187}
3188
b37ad28b
AV		 3189static __be32
3190nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 3191{
3192 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 3193 struct xdr_stream *xdr = &resp->xdr;
1da177e4 3194
bac966d6
BF		 3195 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3196 getattr->ga_bmval, resp->rqstp, 0);
1da177e4
LT		 3197}
3198
695e12f8
BH		 3199static __be32
3200nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 3201{
d0a381dd 3202 struct xdr_stream *xdr = &resp->xdr;
695e12f8 3203 struct svc_fh *fhp = *fhpp;
1da177e4 3204 unsigned int len;
bc749ca4 3205 __be32 *p;
1da177e4 3206
bac966d6
BF		 3207 len = fhp->fh_handle.fh_size;
3208 p = xdr_reserve_space(xdr, len + 4);
3209 if (!p)
3210 return nfserr_resource;
3211 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3212 return 0;
1da177e4
LT		 3213}
3214
3215/*
3216* Including all fields other than the name, a LOCK4denied structure requires
3217* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3218*/
d0a381dd
BF		 3219static __be32
3220nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 3221{
7c13f344 3222 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 3223 __be32 *p;
1da177e4 3224
8c7424cf 3225again:
d0a381dd 3226 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 3227 if (!p) {
3228 /*
3229 * Don't fail to return the result just because we can't
3230 * return the conflicting open:
3231 */
3232 if (conf->len) {
f98bac5a 3233 kfree(conf->data);
8c7424cf
BF		 3234 conf->len = 0;
3235 conf->data = NULL;
3236 goto again;
3237 }
d0a381dd 3238 return nfserr_resource;
8c7424cf 3239 }
b64c7f3b
BF		 3240 p = xdr_encode_hyper(p, ld->ld_start);
3241 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 3242 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 3243 if (conf->len) {
0c0c267b
BF		 3244 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3245 p = xdr_encode_opaque(p, conf->data, conf->len);
f98bac5a 3246 kfree(conf->data);
1da177e4 3247 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 3248 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 3249 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 3250 }
d0a381dd 3251 return nfserr_denied;
1da177e4
LT		 3252}
3253
695e12f8 3254static __be32
b37ad28b 3255nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 3256{
d0a381dd
BF		 3257 struct xdr_stream *xdr = &resp->xdr;
3258
e2f282b9 3259 if (!nfserr)
d0a381dd 3260 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 3261 else if (nfserr == nfserr_denied)
d0a381dd 3262 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
f98bac5a 3263
695e12f8 3264 return nfserr;
1da177e4
LT		 3265}
3266
695e12f8 3267static __be32
b37ad28b 3268nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 3269{
d0a381dd
BF		 3270 struct xdr_stream *xdr = &resp->xdr;
3271
1da177e4 3272 if (nfserr == nfserr_denied)
d0a381dd 3273 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 3274 return nfserr;
1da177e4
LT		 3275}
3276
695e12f8 3277static __be32
b37ad28b 3278nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 3279{
d0a381dd
BF		 3280 struct xdr_stream *xdr = &resp->xdr;
3281
bac966d6 3282 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
1da177e4
LT		 3283}
3284
3285
695e12f8 3286static __be32
b37ad28b 3287nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 3288{
d0a381dd 3289 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3290 __be32 *p;
1da177e4 3291
bac966d6
BF		 3292 p = xdr_reserve_space(xdr, 20);
3293 if (!p)
3294 return nfserr_resource;
3295 p = encode_cinfo(p, &link->li_cinfo);
3296 return 0;
1da177e4
LT		 3297}
3298
3299
695e12f8 3300static __be32
b37ad28b 3301nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 3302{
d0a381dd 3303 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3304 __be32 *p;
1da177e4 3305
d0a381dd
BF		 3306 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3307 if (nfserr)
bac966d6 3308 return nfserr;
75976de6 3309 p = xdr_reserve_space(xdr, 24);
d0a381dd
BF		 3310 if (!p)
3311 return nfserr_resource;
d05d5744 3312 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4 3313 *p++ = cpu_to_be32(open->op_rflags);
1da177e4 3314
75976de6
KM		 3315 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3316 open->op_bmval[2]);
3317 if (nfserr)
bac966d6 3318 return nfserr;
75976de6
KM		 3319
3320 p = xdr_reserve_space(xdr, 4);
3321 if (!p)
3322 return nfserr_resource;
3323
3324 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 3325 switch (open->op_delegate_type) {
3326 case NFS4_OPEN_DELEGATE_NONE:
3327 break;
3328 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 3329 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3330 if (nfserr)
3331 return nfserr;
3332 p = xdr_reserve_space(xdr, 20);
3333 if (!p)
3334 return nfserr_resource;
c373b0a4 3335 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 3336
3337 /*
3338 * TODO: ACE's in delegations
3339 */
c373b0a4
BF		 3340 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3341 *p++ = cpu_to_be32(0);
3342 *p++ = cpu_to_be32(0);
3343 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 3344 break;
3345 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 3346 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3347 if (nfserr)
3348 return nfserr;
3349 p = xdr_reserve_space(xdr, 32);
3350 if (!p)
3351 return nfserr_resource;
c373b0a4 3352 *p++ = cpu_to_be32(0);
1da177e4
LT		 3353
3354 /*
3355 * TODO: space_limit's in delegations
3356 */
c373b0a4
BF		 3357 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3358 *p++ = cpu_to_be32(~(u32)0);
3359 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3360
3361 /*
3362 * TODO: ACE's in delegations
3363 */
c373b0a4
BF		 3364 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3365 *p++ = cpu_to_be32(0);
3366 *p++ = cpu_to_be32(0);
3367 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3368 break;
d24433cd
BH		 3369 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3370 switch (open->op_why_no_deleg) {
3371 case WND4_CONTENTION:
3372 case WND4_RESOURCE:
d0a381dd
BF		 3373 p = xdr_reserve_space(xdr, 8);
3374 if (!p)
3375 return nfserr_resource;
c373b0a4
BF		 3376 *p++ = cpu_to_be32(open->op_why_no_deleg);
3377 /* deleg signaling not supported yet: */
3378 *p++ = cpu_to_be32(0);
d24433cd
BH		 3379 break;
3380 default:
d0a381dd
BF		 3381 p = xdr_reserve_space(xdr, 4);
3382 if (!p)
3383 return nfserr_resource;
c373b0a4 3384 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3385 }
d24433cd 3386 break;
1da177e4
LT		 3387 default:
3388 BUG();
3389 }
3390 /* XXX save filehandle here */
bac966d6 3391 return 0;
1da177e4
LT		 3392}
3393
695e12f8 3394static __be32
b37ad28b 3395nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3396{
d0a381dd
BF		 3397 struct xdr_stream *xdr = &resp->xdr;
3398
bac966d6 3399 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4
LT		 3400}
3401
695e12f8 3402static __be32
b37ad28b 3403nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3404{
d0a381dd
BF		 3405 struct xdr_stream *xdr = &resp->xdr;
3406
bac966d6 3407 return nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4
LT		 3408}
3409
dc97618d
BF		 3410static __be32 nfsd4_encode_splice_read(
3411 struct nfsd4_compoundres *resp,
3412 struct nfsd4_read *read,
3413 struct file *file, unsigned long maxcount)
1da177e4 3414{
ddd1ea56 3415 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3416 struct xdr_buf *buf = xdr->buf;
dc97618d 3417 u32 eof;
ac503e4a 3418 long len;
30596768 3419 int space_left;
dc97618d 3420 __be32 nfserr;
fec25fa4 3421 __be32 *p = xdr->p - 2;
1da177e4 3422
d5d5c304
KM		 3423 /* Make sure there will be room for padding if needed */
3424 if (xdr->end - xdr->p < 1)
d0a381dd 3425 return nfserr_resource;
dc97618d 3426
ac503e4a 3427 len = maxcount;
87c5942e
CL		 3428 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
3429 file, read->rd_offset, &maxcount);
3430 read->rd_length = maxcount;
dc97618d
BF		 3431 if (nfserr) {
3432 /*
3433 * nfsd_splice_actor may have already messed with the
3434 * page length; reset it so as not to confuse
3435 * xdr_truncate_encode:
3436 */
34a78b48 3437 buf->page_len = 0;
dc97618d 3438 return nfserr;
b0e35fda 3439 }
1da177e4 3440
ac503e4a
BC		 3441 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3442 d_inode(read->rd_fhp->fh_dentry)->i_size);
4e21ac4b 3443
fec25fa4
BF		 3444 *(p++) = htonl(eof);
3445 *(p++) = htonl(maxcount);
dc97618d 3446
34a78b48
BF		 3447 buf->page_len = maxcount;
3448 buf->len += maxcount;
15b23ef5
BF		 3449 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3450 / PAGE_SIZE;
dc97618d
BF		 3451
3452 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3453 buf->tail[0].iov_base = xdr->p;
3454 buf->tail[0].iov_len = 0;
fec25fa4 3455 xdr->iov = buf->tail;
dc97618d 3456 if (maxcount&3) {
fec25fa4
BF		 3457 int pad = 4 - (maxcount&3);
3458
3459 *(xdr->p++) = 0;
3460
34a78b48 3461 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3462 buf->tail[0].iov_len = pad;
3463 buf->len += pad;
b0e35fda 3464 }
2825a7f9 3465
dc97618d 3466 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3467 buf->buflen - buf->len);
3468 buf->buflen = buf->len + space_left;
dc97618d
BF		 3469 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3470
3471 return 0;
3472}
3473
3474static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3475 struct nfsd4_read *read,
3476 struct file *file, unsigned long maxcount)
3477{
3478 struct xdr_stream *xdr = &resp->xdr;
3479 u32 eof;
3480 int v;
dc97618d 3481 int starting_len = xdr->buf->len - 8;
dc97618d 3482 long len;
b0420980 3483 int thislen;
dc97618d
BF		 3484 __be32 nfserr;
3485 __be32 tmp;
3486 __be32 *p;
b0420980
BF		 3487 u32 zzz = 0;
3488 int pad;
1da177e4
LT		 3489
3490 len = maxcount;
3491 v = 0;
6ff9897d 3492
1055414f 3493 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
b0420980
BF		 3494 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3495 WARN_ON_ONCE(!p);
3496 resp->rqstp->rq_vec[v].iov_base = p;
3497 resp->rqstp->rq_vec[v].iov_len = thislen;
3498 v++;
3499 len -= thislen;
3500
3501 while (len) {
6ff9897d 3502 thislen = min_t(long, len, PAGE_SIZE);
b0420980
BF		 3503 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3504 WARN_ON_ONCE(!p);
3505 resp->rqstp->rq_vec[v].iov_base = p;
6ff9897d 3506 resp->rqstp->rq_vec[v].iov_len = thislen;
1da177e4 3507 v++;
6ff9897d 3508 len -= thislen;
1da177e4
LT		 3509 }
3510 read->rd_vlen = v;
3511
ac503e4a 3512 len = maxcount;
87c5942e
CL		 3513 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
3514 resp->rqstp->rq_vec, read->rd_vlen, &maxcount);
3515 read->rd_length = maxcount;
dc97618d 3516 if (nfserr)
1da177e4 3517 return nfserr;
b0420980 3518 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
dc97618d 3519
ac503e4a
BC		 3520 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3521 d_inode(read->rd_fhp->fh_dentry)->i_size);
1da177e4 3522
dc97618d
BF		 3523 tmp = htonl(eof);
3524 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3525 tmp = htonl(maxcount);
3526 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3527
b0420980
BF		 3528 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3529 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3530 &zzz, pad);
1da177e4 3531 return 0;
dc97618d
BF		 3532
3533}
3534
3535static __be32
3536nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3537 struct nfsd4_read *read)
3538{
3539 unsigned long maxcount;
3540 struct xdr_stream *xdr = &resp->xdr;
3541 struct file *file = read->rd_filp;
3542 int starting_len = xdr->buf->len;
e749a462 3543 struct raparms *ra = NULL;
dc97618d 3544 __be32 *p;
dc97618d 3545
dc97618d
BF		 3546 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3547 if (!p) {
779fb0f3 3548 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
bac966d6 3549 return nfserr_resource;
dc97618d 3550 }
68e8bb03
CH		 3551 if (resp->xdr.buf->page_len &&
3552 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
b0420980 3553 WARN_ON_ONCE(1);
bac966d6 3554 return nfserr_resource;
dc97618d 3555 }
dc97618d
BF		 3556 xdr_commit_encode(xdr);
3557
3558 maxcount = svc_max_payload(resp->rqstp);
68e8bb03
CH		 3559 maxcount = min_t(unsigned long, maxcount,
3560 (xdr->buf->buflen - xdr->buf->len));
3c7aa15d 3561 maxcount = min_t(unsigned long, maxcount, read->rd_length);
dc97618d 3562
af90f707 3563 if (read->rd_tmp_file)
e749a462 3564 ra = nfsd_init_raparms(file);
dc97618d 3565
68e8bb03
CH		 3566 if (file->f_op->splice_read &&
3567 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
96bcad50 3568 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
dc97618d 3569 else
96bcad50 3570 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
dc97618d 3571
e749a462
CH		 3572 if (ra)
3573 nfsd_put_raparams(file, ra);
dc97618d 3574
96bcad50 3575 if (nfserr)
dc97618d 3576 xdr_truncate_encode(xdr, starting_len);
96bcad50 3577
96bcad50 3578 return nfserr;
1da177e4
LT		 3579}
3580
b37ad28b
AV		 3581static __be32
3582nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3583{
3584 int maxcount;
476a7b1f
BF		 3585 __be32 wire_count;
3586 int zero = 0;
ddd1ea56 3587 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3588 int length_offset = xdr->buf->len;
bc749ca4 3589 __be32 *p;
1da177e4 3590
2825a7f9
BF		 3591 p = xdr_reserve_space(xdr, 4);
3592 if (!p)
3593 return nfserr_resource;
1da177e4 3594 maxcount = PAGE_SIZE;
d0a381dd 3595
476a7b1f
BF		 3596 p = xdr_reserve_space(xdr, maxcount);
3597 if (!p)
4e21ac4b 3598 return nfserr_resource;
1da177e4 3599 /*
fd4a0edf
MS		 3600 * XXX: By default, vfs_readlink() will truncate symlinks if they
3601 * would overflow the buffer. Is this kosher in NFSv4? If not, one
3602 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
3603 * that truncation occurred, and return NFS4ERR_RESOURCE.
1da177e4 3604 */
476a7b1f
BF		 3605 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3606 (char *)p, &maxcount);
1da177e4 3607 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3608 nfserr = nfserr_inval;
3609 if (nfserr) {
1fcea5b2 3610 xdr_truncate_encode(xdr, length_offset);
1da177e4 3611 return nfserr;
d3f627c8 3612 }
1da177e4 3613
476a7b1f
BF		 3614 wire_count = htonl(maxcount);
3615 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
69bbd9c7 3616 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
476a7b1f
BF		 3617 if (maxcount & 3)
3618 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3619 &zero, 4 - (maxcount&3));
1da177e4
LT		 3620 return 0;
3621}
3622
b37ad28b
AV		 3623static __be32
3624nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3625{
3626 int maxcount;
561f0ed4 3627 int bytes_left;
1da177e4 3628 loff_t offset;
561f0ed4 3629 __be64 wire_offset;
ddd1ea56 3630 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3631 int starting_len = xdr->buf->len;
bc749ca4 3632 __be32 *p;
1da177e4 3633
d0a381dd
BF		 3634 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3635 if (!p)
3636 return nfserr_resource;
1da177e4
LT		 3637
3638 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 3639 *p++ = cpu_to_be32(0);
3640 *p++ = cpu_to_be32(0);
4aea24b2
BF		 3641 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3642 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3643
3644 /*
561f0ed4
BF		 3645 * Number of bytes left for directory entries allowing for the
3646 * final 8 bytes of the readdir and a following failed op:
3647 */
3648 bytes_left = xdr->buf->buflen - xdr->buf->len
3649 - COMPOUND_ERR_SLACK_SPACE - 8;
3650 if (bytes_left < 0) {
3651 nfserr = nfserr_resource;
3652 goto err_no_verf;
3653 }
3654 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3655 /*
3656 * Note the rfc defines rd_maxcount as the size of the
3657 * READDIR4resok structure, which includes the verifier above
3658 * and the 8 bytes encoded at the end of this function:
1da177e4 3659 */
561f0ed4
BF		 3660 if (maxcount < 16) {
3661 nfserr = nfserr_toosmall;
1da177e4
LT		 3662 goto err_no_verf;
3663 }
561f0ed4 3664 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3665
aee37764
BF		 3666 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3667 if (!readdir->rd_dircount)
3668 readdir->rd_dircount = INT_MAX;
3669
561f0ed4
BF		 3670 readdir->xdr = xdr;
3671 readdir->rd_maxcount = maxcount;
1da177e4 3672 readdir->common.err = 0;
561f0ed4 3673 readdir->cookie_offset = 0;
1da177e4
LT		 3674
3675 offset = readdir->rd_cookie;
3676 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3677 &offset,
3678 &readdir->common, nfsd4_encode_dirent);
3679 if (nfserr == nfs_ok &&
3680 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3681 xdr->buf->len == starting_len + 8) {
3682 /* nothing encoded; which limit did we hit?: */
3683 if (maxcount - 16 < bytes_left)
3684 /* It was the fault of rd_maxcount: */
3685 nfserr = nfserr_toosmall;
3686 else
3687 /* We ran out of buffer space: */
3688 nfserr = nfserr_resource;
3689 }
1da177e4
LT		 3690 if (nfserr)
3691 goto err_no_verf;
3692
561f0ed4
BF		 3693 if (readdir->cookie_offset) {
3694 wire_offset = cpu_to_be64(offset);
3695 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3696 &wire_offset, 8);
3697 }
1da177e4 3698
561f0ed4
BF		 3699 p = xdr_reserve_space(xdr, 8);
3700 if (!p) {
3701 WARN_ON_ONCE(1);
3702 goto err_no_verf;
3703 }
1da177e4
LT		 3704 *p++ = 0; /* no more entries */
3705 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3706
3707 return 0;
3708err_no_verf:
1fcea5b2 3709 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3710 return nfserr;
3711}
3712
695e12f8 3713static __be32
b37ad28b 3714nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3715{
d0a381dd 3716 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3717 __be32 *p;
1da177e4 3718
bac966d6
BF		 3719 p = xdr_reserve_space(xdr, 20);
3720 if (!p)
3721 return nfserr_resource;
3722 p = encode_cinfo(p, &remove->rm_cinfo);
3723 return 0;
1da177e4
LT		 3724}
3725
695e12f8 3726static __be32
b37ad28b 3727nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3728{
d0a381dd 3729 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3730 __be32 *p;
1da177e4 3731
bac966d6
BF		 3732 p = xdr_reserve_space(xdr, 40);
3733 if (!p)
3734 return nfserr_resource;
3735 p = encode_cinfo(p, &rename->rn_sinfo);
3736 p = encode_cinfo(p, &rename->rn_tinfo);
3737 return 0;
1da177e4
LT		 3738}
3739
695e12f8 3740static __be32
bac966d6 3741nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
dcb488a3 3742{
676e4ebd 3743 u32 i, nflavs, supported;
4796f457
BF		 3744 struct exp_flavor_info *flavs;
3745 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3746 __be32 *p, *flavorsp;
3747 static bool report = true;
dcb488a3 3748
4796f457
BF		 3749 if (exp->ex_nflavors) {
3750 flavs = exp->ex_flavors;
3751 nflavs = exp->ex_nflavors;
3752 } else { /* Handling of some defaults in absence of real secinfo: */
3753 flavs = def_flavs;
3754 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3755 nflavs = 2;
3756 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3757 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3758 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3759 nflavs = 1;
3760 flavs[0].pseudoflavor
3761 = svcauth_gss_flavor(exp->ex_client);
3762 } else {
3763 nflavs = 1;
3764 flavs[0].pseudoflavor
3765 = exp->ex_client->flavour->flavour;
3766 }
3767 }
3768
676e4ebd 3769 supported = 0;
d0a381dd
BF		 3770 p = xdr_reserve_space(xdr, 4);
3771 if (!p)
bac966d6 3772 return nfserr_resource;
676e4ebd 3773 flavorsp = p++; /* to be backfilled later */
676e4ebd 3774
4796f457 3775 for (i = 0; i < nflavs; i++) {
676e4ebd 3776 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3777 struct rpcsec_gss_info info;
dcb488a3 3778
676e4ebd
CL		 3779 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3780 supported++;
d0a381dd
BF		 3781 p = xdr_reserve_space(xdr, 4 + 4 +
3782 XDR_LEN(info.oid.len) + 4 + 4);
3783 if (!p)
bac966d6 3784 return nfserr_resource;
c373b0a4 3785 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 3786 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 3787 *p++ = cpu_to_be32(info.qop);
3788 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 3789 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3790 supported++;
d0a381dd
BF		 3791 p = xdr_reserve_space(xdr, 4);
3792 if (!p)
bac966d6 3793 return nfserr_resource;
c373b0a4 3794 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 3795 } else {
3796 if (report)
3797 pr_warn("NFS: SECINFO: security flavor %u "
3798 "is not supported\n", pf);
dcb488a3
AA		 3799 }
3800 }
a77c806f 3801
676e4ebd
CL		 3802 if (nflavs != supported)
3803 report = false;
3804 *flavorsp = htonl(supported);
bac966d6 3805 return 0;
dcb488a3
AA		 3806}
3807
22b6dee8
MJ		 3808static __be32
3809nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3810 struct nfsd4_secinfo *secinfo)
3811{
d0a381dd
BF		 3812 struct xdr_stream *xdr = &resp->xdr;
3813
bac966d6 3814 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
22b6dee8
MJ		 3815}
3816
3817static __be32
3818nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3819 struct nfsd4_secinfo_no_name *secinfo)
3820{
d0a381dd
BF		 3821 struct xdr_stream *xdr = &resp->xdr;
3822
bac966d6 3823 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
22b6dee8
MJ		 3824}
3825
1da177e4
LT		 3826/*
3827 * The SETATTR encode routine is special -- it always encodes a bitmap,
3828 * regardless of the error status.
3829 */
695e12f8 3830static __be32
b37ad28b 3831nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3832{
d0a381dd 3833 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3834 __be32 *p;
1da177e4 3835
d0a381dd
BF		 3836 p = xdr_reserve_space(xdr, 16);
3837 if (!p)
3838 return nfserr_resource;
1da177e4 3839 if (nfserr) {
c373b0a4
BF		 3840 *p++ = cpu_to_be32(3);
3841 *p++ = cpu_to_be32(0);
3842 *p++ = cpu_to_be32(0);
3843 *p++ = cpu_to_be32(0);
1da177e4
LT		 3844 }
3845 else {
c373b0a4
BF		 3846 *p++ = cpu_to_be32(3);
3847 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3848 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3849 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 3850 }
695e12f8 3851 return nfserr;
1da177e4
LT		 3852}
3853
695e12f8 3854static __be32
b37ad28b 3855nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3856{
d0a381dd 3857 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3858 __be32 *p;
1da177e4
LT		 3859
3860 if (!nfserr) {
d0a381dd
BF		 3861 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3862 if (!p)
3863 return nfserr_resource;
0c0c267b
BF		 3864 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3865 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3866 NFS4_VERIFIER_SIZE);
1da177e4
LT		 3867 }
3868 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3869 p = xdr_reserve_space(xdr, 8);
3870 if (!p)
3871 return nfserr_resource;
c373b0a4
BF		 3872 *p++ = cpu_to_be32(0);
3873 *p++ = cpu_to_be32(0);
1da177e4 3874 }
695e12f8 3875 return nfserr;
1da177e4
LT		 3876}
3877
695e12f8 3878static __be32
b37ad28b 3879nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3880{
d0a381dd 3881 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3882 __be32 *p;
1da177e4 3883
bac966d6
BF		 3884 p = xdr_reserve_space(xdr, 16);
3885 if (!p)
3886 return nfserr_resource;
3887 *p++ = cpu_to_be32(write->wr_bytes_written);
3888 *p++ = cpu_to_be32(write->wr_how_written);
3889 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3890 NFS4_VERIFIER_SIZE);
3891 return 0;
1da177e4
LT		 3892}
3893
2db134eb 3894static __be32
57b7b43b 3895nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3896 struct nfsd4_exchange_id *exid)
3897{
d0a381dd 3898 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3899 __be32 *p;
0733d213
AA		 3900 char *major_id;
3901 char *server_scope;
3902 int major_id_sz;
3903 int server_scope_sz;
3904 uint64_t minor_id = 0;
3905
0733d213
AA		 3906 major_id = utsname()->nodename;
3907 major_id_sz = strlen(major_id);
3908 server_scope = utsname()->nodename;
3909 server_scope_sz = strlen(server_scope);
3910
d0a381dd 3911 p = xdr_reserve_space(xdr,
0733d213
AA		 3912 8 /* eir_clientid */ +
3913 4 /* eir_sequenceid */ +
3914 4 /* eir_flags */ +
a8bb84bc 3915 4 /* spr_how */);
d0a381dd
BF		 3916 if (!p)
3917 return nfserr_resource;
0733d213 3918
0c0c267b 3919 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 3920 *p++ = cpu_to_be32(exid->seqid);
3921 *p++ = cpu_to_be32(exid->flags);
0733d213 3922
c373b0a4 3923 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 3924
57266a6e
BF		 3925 switch (exid->spa_how) {
3926 case SP4_NONE:
3927 break;
3928 case SP4_MACH_CRED:
3929 /* spo_must_enforce bitmap: */
bac966d6 3930 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 3931 exid->spo_must_enforce[0],
3932 exid->spo_must_enforce[1],
3933 exid->spo_must_enforce[2]);
bac966d6
BF		 3934 if (nfserr)
3935 return nfserr;
ed941643 3936 /* spo_must_allow bitmap: */
bac966d6 3937 nfserr = nfsd4_encode_bitmap(xdr,
ed941643
AE		 3938 exid->spo_must_allow[0],
3939 exid->spo_must_allow[1],
3940 exid->spo_must_allow[2]);
bac966d6
BF		 3941 if (nfserr)
3942 return nfserr;
57266a6e
BF		 3943 break;
3944 default:
3945 WARN_ON_ONCE(1);
3946 }
0733d213 3947
d0a381dd 3948 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3949 8 /* so_minor_id */ +
3950 4 /* so_major_id.len */ +
3951 (XDR_QUADLEN(major_id_sz) * 4) +
3952 4 /* eir_server_scope.len */ +
3953 (XDR_QUADLEN(server_scope_sz) * 4) +
3954 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3955 if (!p)
3956 return nfserr_resource;
a8bb84bc 3957
0733d213 3958 /* The server_owner struct */
b64c7f3b 3959 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 3960 /* major id */
0c0c267b 3961 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 3962
3963 /* Server scope */
0c0c267b 3964 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 3965
3966 /* Implementation id */
c373b0a4 3967 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 3968 return 0;
2db134eb
AA		 3969}
3970
3971static __be32
57b7b43b 3972nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3973 struct nfsd4_create_session *sess)
3974{
d0a381dd 3975 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3976 __be32 *p;
ec6b5d7b 3977
d0a381dd
BF		 3978 p = xdr_reserve_space(xdr, 24);
3979 if (!p)
3980 return nfserr_resource;
0c0c267b
BF		 3981 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3982 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3983 *p++ = cpu_to_be32(sess->seqid);
3984 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 3985
d0a381dd
BF		 3986 p = xdr_reserve_space(xdr, 28);
3987 if (!p)
3988 return nfserr_resource;
c373b0a4
BF		 3989 *p++ = cpu_to_be32(0); /* headerpadsz */
3990 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3991 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3992 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3993 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3994 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3995 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3996
3997 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 3998 p = xdr_reserve_space(xdr, 4);
3999 if (!p)
4000 return nfserr_resource;
c373b0a4 4001 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 4002 }
4003
d0a381dd
BF		 4004 p = xdr_reserve_space(xdr, 28);
4005 if (!p)
4006 return nfserr_resource;
c373b0a4
BF		 4007 *p++ = cpu_to_be32(0); /* headerpadsz */
4008 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4009 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4010 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4011 *p++ = cpu_to_be32(sess->back_channel.maxops);
4012 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4013 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 4014
4015 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 4016 p = xdr_reserve_space(xdr, 4);
4017 if (!p)
4018 return nfserr_resource;
c373b0a4 4019 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 4020 }
4021 return 0;
2db134eb
AA		 4022}
4023
c47d832b 4024static __be32
57b7b43b 4025nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 4026 struct nfsd4_sequence *seq)
4027{
d0a381dd 4028 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 4029 __be32 *p;
b85d4c01 4030
d0a381dd
BF		 4031 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4032 if (!p)
4033 return nfserr_resource;
0c0c267b
BF		 4034 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4035 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 4036 *p++ = cpu_to_be32(seq->seqid);
4037 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 4038 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 4039 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4040 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4041 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 4042
f5236013 4043 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 4044 return 0;
2db134eb
AA		 4045}
4046
2355c596 4047static __be32
57b7b43b 4048nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 4049 struct nfsd4_test_stateid *test_stateid)
4050{
d0a381dd 4051 struct xdr_stream *xdr = &resp->xdr;
03cfb420 4052 struct nfsd4_test_stateid_id *stateid, *next;
17456804 4053 __be32 *p;
17456804 4054
d0a381dd
BF		 4055 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4056 if (!p)
4057 return nfserr_resource;
17456804 4058 *p++ = htonl(test_stateid->ts_num_ids);
17456804 4059
03cfb420 4060 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 4061 *p++ = stateid->ts_id_status;
17456804 4062 }
17456804 4063
bac966d6 4064 return 0;
17456804
BS		 4065}
4066
9cf514cc
CH		 4067#ifdef CONFIG_NFSD_PNFS
4068static __be32
4069nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4070 struct nfsd4_getdeviceinfo *gdev)
4071{
4072 struct xdr_stream *xdr = &resp->xdr;
f961e3f2 4073 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4074 u32 starting_len = xdr->buf->len, needed_len;
4075 __be32 *p;
4076
9cf514cc
CH		 4077 p = xdr_reserve_space(xdr, 4);
4078 if (!p)
bac966d6 4079 return nfserr_resource;
9cf514cc
CH		 4080
4081 *p++ = cpu_to_be32(gdev->gd_layout_type);
4082
4083 /* If maxcount is 0 then just update notifications */
4084 if (gdev->gd_maxcount != 0) {
f961e3f2 4085 ops = nfsd4_layout_ops[gdev->gd_layout_type];
9cf514cc
CH		 4086 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4087 if (nfserr) {
4088 /*
4089 * We don't bother to burden the layout drivers with
4090 * enforcing gd_maxcount, just tell the client to
4091 * come back with a bigger buffer if it's not enough.
4092 */
4093 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4094 goto toosmall;
bac966d6 4095 return nfserr;
9cf514cc
CH		 4096 }
4097 }
4098
9cf514cc
CH		 4099 if (gdev->gd_notify_types) {
4100 p = xdr_reserve_space(xdr, 4 + 4);
4101 if (!p)
bac966d6 4102 return nfserr_resource;
9cf514cc
CH		 4103 *p++ = cpu_to_be32(1); /* bitmap length */
4104 *p++ = cpu_to_be32(gdev->gd_notify_types);
4105 } else {
4106 p = xdr_reserve_space(xdr, 4);
4107 if (!p)
bac966d6 4108 return nfserr_resource;
9cf514cc
CH		 4109 *p++ = 0;
4110 }
4111
bac966d6 4112 return 0;
9cf514cc
CH		 4113toosmall:
4114 dprintk("%s: maxcount too small\n", __func__);
4115 needed_len = xdr->buf->len + 4 /* notifications */;
4116 xdr_truncate_encode(xdr, starting_len);
4117 p = xdr_reserve_space(xdr, 4);
bac966d6
BF		 4118 if (!p)
4119 return nfserr_resource;
4120 *p++ = cpu_to_be32(needed_len);
4121 return nfserr_toosmall;
9cf514cc
CH		 4122}
4123
4124static __be32
4125nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4126 struct nfsd4_layoutget *lgp)
4127{
4128 struct xdr_stream *xdr = &resp->xdr;
f961e3f2 4129 const struct nfsd4_layout_ops *ops;
9cf514cc
CH		 4130 __be32 *p;
4131
9cf514cc
CH		 4132 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4133 if (!p)
bac966d6 4134 return nfserr_resource;
9cf514cc
CH		 4135
4136 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4137 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4138 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4139 sizeof(stateid_opaque_t));
4140
4141 *p++ = cpu_to_be32(1); /* we always return a single layout */
4142 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4143 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4144 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4145 *p++ = cpu_to_be32(lgp->lg_layout_type);
4146
f961e3f2 4147 ops = nfsd4_layout_ops[lgp->lg_layout_type];
bac966d6 4148 return ops->encode_layoutget(xdr, lgp);
9cf514cc
CH		 4149}
4150
4151static __be32
4152nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4153 struct nfsd4_layoutcommit *lcp)
4154{
4155 struct xdr_stream *xdr = &resp->xdr;
4156 __be32 *p;
4157
9cf514cc
CH		 4158 p = xdr_reserve_space(xdr, 4);
4159 if (!p)
4160 return nfserr_resource;
4161 *p++ = cpu_to_be32(lcp->lc_size_chg);
4162 if (lcp->lc_size_chg) {
4163 p = xdr_reserve_space(xdr, 8);
4164 if (!p)
4165 return nfserr_resource;
4166 p = xdr_encode_hyper(p, lcp->lc_newsize);
4167 }
4168
bac966d6 4169 return 0;
9cf514cc
CH		 4170}
4171
4172static __be32
4173nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4174 struct nfsd4_layoutreturn *lrp)
4175{
4176 struct xdr_stream *xdr = &resp->xdr;
4177 __be32 *p;
4178
9cf514cc
CH		 4179 p = xdr_reserve_space(xdr, 4);
4180 if (!p)
4181 return nfserr_resource;
4182 *p++ = cpu_to_be32(lrp->lrs_present);
4183 if (lrp->lrs_present)
376675da 4184 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
bac966d6 4185 return 0;
9cf514cc
CH		 4186}
4187#endif /* CONFIG_NFSD_PNFS */
4188
29ae7f9d
AS		 4189static __be32
4190nfsd42_encode_write_res(struct nfsd4_compoundres *resp, struct nfsd42_write_res *write)
4191{
4192 __be32 *p;
4193
4194 p = xdr_reserve_space(&resp->xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE);
4195 if (!p)
4196 return nfserr_resource;
4197
4198 *p++ = cpu_to_be32(0);
4199 p = xdr_encode_hyper(p, write->wr_bytes_written);
4200 *p++ = cpu_to_be32(write->wr_stable_how);
4201 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4202 NFS4_VERIFIER_SIZE);
4203 return nfs_ok;
4204}
4205
4206static __be32
4207nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4208 struct nfsd4_copy *copy)
4209{
4210 __be32 *p;
4211
bac966d6
BF		 4212 nfserr = nfsd42_encode_write_res(resp, &copy->cp_res);
4213 if (nfserr)
4214 return nfserr;
29ae7f9d 4215
bac966d6 4216 p = xdr_reserve_space(&resp->xdr, 4 + 4);
edcc8452 4217 *p++ = xdr_one; /* cr_consecutive */
bac966d6
BF		 4218 *p++ = cpu_to_be32(copy->cp_synchronous);
4219 return 0;
29ae7f9d
AS		 4220}
4221
24bab491
AS		 4222static __be32
4223nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4224 struct nfsd4_seek *seek)
4225{
4226 __be32 *p;
4227
24bab491
AS		 4228 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4229 *p++ = cpu_to_be32(seek->seek_eof);
4230 p = xdr_encode_hyper(p, seek->seek_pos);
4231
bac966d6 4232 return 0;
24bab491
AS		 4233}
4234
695e12f8
BH		 4235static __be32
4236nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4237{
4238 return nfserr;
4239}
4240
4241typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4242
2db134eb
AA		 4243/*
4244 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4245 * since we don't need to filter out obsolete ops as this is
4246 * done in the decoding phase.
4247 */
c1df609d 4248static const nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 4249 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4250 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4251 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4252 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4253 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4254 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4255 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4256 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4257 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4258 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4259 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4260 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4261 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4262 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4263 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4264 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 4265 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 4266 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4267 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4268 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4269 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4270 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4271 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4272 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4273 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4274 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4275 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4276 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4277 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4278 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4279 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4280 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4281 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4282 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4283 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4284 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4285 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 4286
4287 /* NFSv4.1 operations */
4288 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 4289 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 4290 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4291 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 4292 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4293 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb 4294 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc
CH		 4295#ifdef CONFIG_NFSD_PNFS
4296 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4297 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4298 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4299 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4300 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4301#else
2db134eb
AA		 4302 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4303 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4304 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4305 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4306 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc 4307#endif
22b6dee8 4308 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 4309 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4310 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 4311 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 4312 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4313 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4314 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
87a15a80
AS		 4315
4316 /* NFSv4.2 operations */
4317 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
29ae7f9d 4318 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
87a15a80
AS		 4319 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4320 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4321 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4322 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4323 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4324 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4325 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4326 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
24bab491 4327 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
87a15a80 4328 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
ffa0160a 4329 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 4330};
4331
496c262c 4332/*
a8095f7e
BF		 4333 * Calculate whether we still have space to encode repsize bytes.
4334 * There are two considerations:
4335 * - For NFS versions >=4.1, the size of the reply must stay within
4336 * session limits
4337 * - For all NFS versions, we must stay within limited preallocated
4338 * buffer space.
496c262c 4339 *
a8095f7e
BF		 4340 * This is called before the operation is processed, so can only provide
4341 * an upper estimate. For some nonidempotent operations (such as
4342 * getattr), it's not necessarily a problem if that estimate is wrong,
4343 * as we can fail it after processing without significant side effects.
496c262c 4344 */
a8095f7e 4345__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 4346{
67492c99 4347 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 4348 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 4349
47ee5298
BF		 4350 if (buf->len + respsize <= buf->buflen)
4351 return nfs_ok;
4352 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 4353 return nfserr_resource;
47ee5298
BF		 4354 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4355 WARN_ON_ONCE(1);
4356 return nfserr_rep_too_big_to_cache;
ea8d7720 4357 }
47ee5298 4358 return nfserr_rep_too_big;
496c262c
AA		 4359}
4360
1da177e4
LT		 4361void
4362nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4363{
082d4bd7 4364 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 4365 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 4366 struct svc_rqst *rqstp = resp->rqstp;
34b1744c 4367 const struct nfsd4_operation *opdesc = op->opdesc;
082d4bd7 4368 int post_err_offset;
07d1f802 4369 nfsd4_enc encoder;
bc749ca4 4370 __be32 *p;
1da177e4 4371
d0a381dd
BF		 4372 p = xdr_reserve_space(xdr, 8);
4373 if (!p) {
4374 WARN_ON_ONCE(1);
4375 return;
4376 }
c373b0a4 4377 *p++ = cpu_to_be32(op->opnum);
082d4bd7 4378 post_err_offset = xdr->buf->len;
1da177e4 4379
695e12f8
BH		 4380 if (op->opnum == OP_ILLEGAL)
4381 goto status;
b7571e4c
BF		 4382 if (op->status && opdesc &&
4383 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
4384 goto status;
695e12f8
BH		 4385 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4386 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 4387 encoder = nfsd4_enc_ops[op->opnum];
4388 op->status = encoder(resp, op->status, &op->u);
34b1744c
BF		 4389 if (opdesc && opdesc->op_release)
4390 opdesc->op_release(&op->u);
2825a7f9
BF		 4391 xdr_commit_encode(xdr);
4392
067e1ace 4393 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 4394 if (!op->status) {
4395 int space_needed = 0;
4396 if (!nfsd4_last_compound_op(rqstp))
4397 space_needed = COMPOUND_ERR_SLACK_SPACE;
4398 op->status = nfsd4_check_resp_size(resp, space_needed);
4399 }
c8f13d97
BF		 4400 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4401 struct nfsd4_slot *slot = resp->cstate.slot;
4402
4403 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4404 op->status = nfserr_rep_too_big_to_cache;
4405 else
4406 op->status = nfserr_rep_too_big;
4407 }
07d1f802
BF		 4408 if (op->status == nfserr_resource ||
4409 op->status == nfserr_rep_too_big ||
4410 op->status == nfserr_rep_too_big_to_cache) {
4411 /*
4412 * The operation may have already been encoded or
4413 * partially encoded. No op returns anything additional
4414 * in the case of one of these three errors, so we can
4415 * just truncate back to after the status. But it's a
4416 * bug if we had to do this on a non-idempotent op:
4417 */
4418 warn_on_nonidempotent_op(op);
082d4bd7 4419 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 4420 }
9411b1d4 4421 if (so) {
082d4bd7
BF		 4422 int len = xdr->buf->len - post_err_offset;
4423
9411b1d4 4424 so->so_replay.rp_status = op->status;
082d4bd7
BF		 4425 so->so_replay.rp_buflen = len;
4426 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4427 so->so_replay.rp_buf, len);
9411b1d4 4428 }
695e12f8 4429status:
082d4bd7
BF		 4430 /* Note that op->status is already in network byte order: */
4431 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 4432}
4433
4434/*
4435 * Encode the reply stored in the stateowner reply cache
4436 *
4437 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4438 * previously sent already encoded operation.
1da177e4
LT		 4439 */
4440void
d0a381dd 4441nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 4442{
bc749ca4 4443 __be32 *p;
1da177e4
LT		 4444 struct nfs4_replay *rp = op->replay;
4445
4446 BUG_ON(!rp);
4447
d0a381dd
BF		 4448 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4449 if (!p) {
4450 WARN_ON_ONCE(1);
4451 return;
4452 }
c373b0a4 4453 *p++ = cpu_to_be32(op->opnum);
1da177e4 4454 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 4455
0c0c267b 4456 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 4457}
4458
1da177e4 4459int
63f8de37 4460nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
1da177e4
LT		 4461{
4462 return xdr_ressize_check(rqstp, p);
4463}
4464
8537488b 4465void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
1da177e4 4466{
3e98abff
BF		 4467 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4468
1da177e4
LT		 4469 if (args->ops != args->iops) {
4470 kfree(args->ops);
4471 args->ops = args->iops;
4472 }
f99d49ad
JJ		 4473 kfree(args->tmpp);
4474 args->tmpp = NULL;
1da177e4 4475 while (args->to_free) {
d5e23383 4476 struct svcxdr_tmpbuf *tb = args->to_free;
1da177e4 4477 args->to_free = tb->next;
1da177e4
LT		 4478 kfree(tb);
4479 }
4480}
4481
4482int
026fec7e 4483nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
1da177e4 4484{
026fec7e
CH		 4485 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4486
e874f9f8
JL		 4487 if (rqstp->rq_arg.head[0].iov_len % 4) {
4488 /* client is nuts */
4489 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4490 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4491 return 0;
4492 }
1da177e4
LT		 4493 args->p = p;
4494 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4495 args->pagelist = rqstp->rq_arg.pages;
4496 args->pagelen = rqstp->rq_arg.page_len;
eae03e2a 4497 args->tail = false;
1da177e4
LT		 4498 args->tmpp = NULL;
4499 args->to_free = NULL;
4500 args->ops = args->iops;
4501 args->rqstp = rqstp;
4502
3e98abff 4503 return !nfsd4_decode_compound(args);
1da177e4
LT		 4504}
4505
4506int
63f8de37 4507nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
1da177e4
LT		 4508{
4509 /*
4510 * All that remains is to write the tag and operation count...
4511 */
63f8de37 4512 struct nfsd4_compoundres *resp = rqstp->rq_resp;
6ac90391
BF		 4513 struct xdr_buf *buf = resp->xdr.buf;
4514
4515 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4516 buf->tail[0].iov_len);
dd97fdde 4517
2825a7f9
BF		 4518 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4519
1da177e4
LT		 4520 p = resp->tagp;
4521 *p++ = htonl(resp->taglen);
4522 memcpy(p, resp->tag, resp->taglen);
4523 p += XDR_QUADLEN(resp->taglen);
4524 *p++ = htonl(resp->opcnt);
4525
b607664e 4526 nfsd4_sequence_done(resp);
1da177e4
LT		 4527 return 1;
4528}
4529
4530/*
4531 * Local variables:
4532 * c-basic-offset: 8
4533 * End:
4534 */
Linux 6.x block layer and io_uring tree(s)