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nfsd4: kill write32, write64
[people/ms/linux.git] / fs / nfsd / nfs4xdr.c
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1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
5a0e3ad6 43#include <linux/slab.h>
1da177e4 44#include <linux/namei.h>
341eb184 45#include <linux/statfs.h>
0733d213 46#include <linux/utsname.h>
17456804 47#include <linux/pagemap.h>
4796f457 48#include <linux/sunrpc/svcauth_gss.h>
9a74af21 49
2ca72e17
BF		 50#include "idmap.h"
51#include "acl.h"
9a74af21 52#include "xdr4.h"
0a3adade 53#include "vfs.h"
17456804 54#include "state.h"
1091006c 55#include "cache.h"
3d733711 56#include "netns.h"
2ca72e17 57
18032ca0
DQ		 58#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
59#include <linux/security.h>
60#endif
61
62
1da177e4
LT		 63#define NFSDDBG_FACILITY NFSDDBG_XDR
64
42ca0993
BF		 65/*
66 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
67 * directory in order to indicate to the client that a filesystem boundary is present
68 * We use a fixed fsid for a referral
69 */
70#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
71#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
72
b37ad28b 73static __be32
a36b1725 74check_filename(char *str, int len)
1da177e4
LT		 75{
76 int i;
77
78 if (len == 0)
79 return nfserr_inval;
80 if (isdotent(str, len))
a36b1725 81 return nfserr_badname;
1da177e4
LT		 82 for (i = 0; i < len; i++)
83 if (str[i] == '/')
a36b1725 84 return nfserr_badname;
1da177e4
LT		 85 return 0;
86}
87
1da177e4 88#define DECODE_HEAD \
2ebbc012 89 __be32 *p; \
b37ad28b 90 __be32 status
1da177e4
LT		 91#define DECODE_TAIL \
92 status = 0; \
93out: \
94 return status; \
95xdr_error: \
817cb9d4
CL		 96 dprintk("NFSD: xdr error (%s:%d)\n", \
97 __FILE__, __LINE__); \
1da177e4
LT		 98 status = nfserr_bad_xdr; \
99 goto out
100
101#define READ32(x) (x) = ntohl(*p++)
102#define READ64(x) do { \
103 (x) = (u64)ntohl(*p++) << 32; \
104 (x) |= ntohl(*p++); \
105} while (0)
1da177e4
LT		 106#define READMEM(x,nbytes) do { \
107 x = (char *)p; \
108 p += XDR_QUADLEN(nbytes); \
109} while (0)
110#define SAVEMEM(x,nbytes) do { \
111 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
112 savemem(argp, p, nbytes) : \
113 (char *)p)) { \
817cb9d4
CL		 114 dprintk("NFSD: xdr error (%s:%d)\n", \
115 __FILE__, __LINE__); \
1da177e4
LT		 116 goto xdr_error; \
117 } \
118 p += XDR_QUADLEN(nbytes); \
119} while (0)
120#define COPYMEM(x,nbytes) do { \
121 memcpy((x), p, nbytes); \
122 p += XDR_QUADLEN(nbytes); \
123} while (0)
124
125/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
126#define READ_BUF(nbytes) do { \
127 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
128 p = argp->p; \
129 argp->p += XDR_QUADLEN(nbytes); \
130 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 131 dprintk("NFSD: xdr error (%s:%d)\n", \
132 __FILE__, __LINE__); \
1da177e4
LT		 133 goto xdr_error; \
134 } \
135} while (0)
136
590b7431
BF		 137static void next_decode_page(struct nfsd4_compoundargs *argp)
138{
590b7431 139 argp->p = page_address(argp->pagelist[0]);
365da4ad 140 argp->pagelist++;
590b7431
BF		 141 if (argp->pagelen < PAGE_SIZE) {
142 argp->end = argp->p + (argp->pagelen>>2);
143 argp->pagelen = 0;
144 } else {
145 argp->end = argp->p + (PAGE_SIZE>>2);
146 argp->pagelen -= PAGE_SIZE;
147 }
148}
149
ca2a05aa 150static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 151{
152 /* We want more bytes than seem to be available.
153 * Maybe we need a new page, maybe we have just run out
154 */
ca2a05aa 155 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 156 __be32 *p;
1da177e4
LT		 157 if (avail + argp->pagelen < nbytes)
158 return NULL;
159 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
160 return NULL;
161 /* ok, we can do it with the current plus the next page */
162 if (nbytes <= sizeof(argp->tmp))
163 p = argp->tmp;
164 else {
f99d49ad 165 kfree(argp->tmpp);
1da177e4
LT		 166 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
167 if (!p)
168 return NULL;
169
170 }
ca2a05aa
BF		 171 /*
172 * The following memcpy is safe because read_buf is always
173 * called with nbytes > avail, and the two cases above both
174 * guarantee p points to at least nbytes bytes.
175 */
1da177e4 176 memcpy(p, argp->p, avail);
590b7431 177 next_decode_page(argp);
1da177e4
LT		 178 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
179 argp->p += XDR_QUADLEN(nbytes - avail);
180 return p;
181}
182
60adfc50
AA		 183static int zero_clientid(clientid_t *clid)
184{
185 return (clid->cl_boot == 0) && (clid->cl_id == 0);
186}
187
2d8498db
CH		 188/**
189 * defer_free - mark an allocation as deferred freed
190 * @argp: NFSv4 compound argument structure to be freed with
191 * @release: release callback to free @p, typically kfree()
192 * @p: pointer to be freed
193 *
194 * Marks @p to be freed when processing the compound operation
195 * described in @argp finishes.
196 */
1da177e4
LT		 197static int
198defer_free(struct nfsd4_compoundargs *argp,
199 void (*release)(const void *), void *p)
200{
201 struct tmpbuf *tb;
202
203 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
204 if (!tb)
205 return -ENOMEM;
206 tb->buf = p;
207 tb->release = release;
208 tb->next = argp->to_free;
209 argp->to_free = tb;
210 return 0;
211}
212
2d8498db
CH		 213/**
214 * savemem - duplicate a chunk of memory for later processing
215 * @argp: NFSv4 compound argument structure to be freed with
216 * @p: pointer to be duplicated
217 * @nbytes: length to be duplicated
218 *
219 * Returns a pointer to a copy of @nbytes bytes of memory at @p
220 * that are preserved until processing of the NFSv4 compound
221 * operation described by @argp finishes.
222 */
2ebbc012 223static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 224{
1da177e4 225 if (p == argp->tmp) {
67114fe6 226 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
a4db5fe5
BF		 227 if (!p)
228 return NULL;
1da177e4 229 } else {
73dff8be 230 BUG_ON(p != argp->tmpp);
1da177e4
LT		 231 argp->tmpp = NULL;
232 }
233 if (defer_free(argp, kfree, p)) {
a4db5fe5 234 kfree(p);
1da177e4
LT		 235 return NULL;
236 } else
237 return (char *)p;
238}
239
b37ad28b 240static __be32
1da177e4
LT		 241nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
242{
243 u32 bmlen;
244 DECODE_HEAD;
245
246 bmval[0] = 0;
247 bmval[1] = 0;
7e705706 248 bmval[2] = 0;
1da177e4
LT		 249
250 READ_BUF(4);
251 READ32(bmlen);
252 if (bmlen > 1000)
253 goto xdr_error;
254
255 READ_BUF(bmlen << 2);
256 if (bmlen > 0)
257 READ32(bmval[0]);
258 if (bmlen > 1)
259 READ32(bmval[1]);
7e705706
AA		 260 if (bmlen > 2)
261 READ32(bmval[2]);
1da177e4
LT		 262
263 DECODE_TAIL;
264}
265
b37ad28b 266static __be32
3c8e0316 267nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0
DQ		 268 struct iattr *iattr, struct nfs4_acl **acl,
269 struct xdr_netobj *label)
1da177e4
LT		 270{
271 int expected_len, len = 0;
272 u32 dummy32;
273 char *buf;
274
275 DECODE_HEAD;
276 iattr->ia_valid = 0;
277 if ((status = nfsd4_decode_bitmap(argp, bmval)))
278 return status;
279
1da177e4
LT		 280 READ_BUF(4);
281 READ32(expected_len);
282
283 if (bmval[0] & FATTR4_WORD0_SIZE) {
284 READ_BUF(8);
285 len += 8;
286 READ64(iattr->ia_size);
287 iattr->ia_valid |= ATTR_SIZE;
288 }
289 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 290 u32 nace;
28e05dd8 291 struct nfs4_ace *ace;
1da177e4
LT		 292
293 READ_BUF(4); len += 4;
294 READ32(nace);
295
28e05dd8 296 if (nace > NFS4_ACL_MAX)
798df338 297 return nfserr_fbig;
28e05dd8
BF		 298
299 *acl = nfs4_acl_new(nace);
eba1c99c
KM		 300 if (*acl == NULL)
301 return nfserr_jukebox;
302
28e05dd8 303 defer_free(argp, kfree, *acl);
1da177e4 304
28e05dd8
BF		 305 (*acl)->naces = nace;
306 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 307 READ_BUF(16); len += 16;
28e05dd8
BF		 308 READ32(ace->type);
309 READ32(ace->flag);
310 READ32(ace->access_mask);
1da177e4
LT		 311 READ32(dummy32);
312 READ_BUF(dummy32);
313 len += XDR_QUADLEN(dummy32) << 2;
314 READMEM(buf, dummy32);
28e05dd8 315 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 316 status = nfs_ok;
28e05dd8 317 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 318 ;
28e05dd8 319 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 320 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 321 buf, dummy32, &ace->who_gid);
1da177e4 322 else
3c726023 323 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 324 buf, dummy32, &ace->who_uid);
3c726023
BF		 325 if (status)
326 return status;
1da177e4
LT		 327 }
328 } else
329 *acl = NULL;
330 if (bmval[1] & FATTR4_WORD1_MODE) {
331 READ_BUF(4);
332 len += 4;
333 READ32(iattr->ia_mode);
334 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
335 iattr->ia_valid |= ATTR_MODE;
336 }
337 if (bmval[1] & FATTR4_WORD1_OWNER) {
338 READ_BUF(4);
339 len += 4;
340 READ32(dummy32);
341 READ_BUF(dummy32);
342 len += (XDR_QUADLEN(dummy32) << 2);
343 READMEM(buf, dummy32);
47c85291
N		 344 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
345 return status;
1da177e4
LT		 346 iattr->ia_valid |= ATTR_UID;
347 }
348 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
349 READ_BUF(4);
350 len += 4;
351 READ32(dummy32);
352 READ_BUF(dummy32);
353 len += (XDR_QUADLEN(dummy32) << 2);
354 READMEM(buf, dummy32);
47c85291
N		 355 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
356 return status;
1da177e4
LT		 357 iattr->ia_valid |= ATTR_GID;
358 }
359 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
360 READ_BUF(4);
361 len += 4;
362 READ32(dummy32);
363 switch (dummy32) {
364 case NFS4_SET_TO_CLIENT_TIME:
365 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
366 all 32 bits of 'nseconds'. */
367 READ_BUF(12);
368 len += 12;
bf8d9097 369 READ64(iattr->ia_atime.tv_sec);
1da177e4
LT		 370 READ32(iattr->ia_atime.tv_nsec);
371 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
372 return nfserr_inval;
373 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
374 break;
375 case NFS4_SET_TO_SERVER_TIME:
376 iattr->ia_valid |= ATTR_ATIME;
377 break;
378 default:
379 goto xdr_error;
380 }
381 }
1da177e4
LT		 382 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
383 READ_BUF(4);
384 len += 4;
385 READ32(dummy32);
386 switch (dummy32) {
387 case NFS4_SET_TO_CLIENT_TIME:
388 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
389 all 32 bits of 'nseconds'. */
390 READ_BUF(12);
391 len += 12;
bf8d9097 392 READ64(iattr->ia_mtime.tv_sec);
1da177e4
LT		 393 READ32(iattr->ia_mtime.tv_nsec);
394 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
395 return nfserr_inval;
396 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
397 break;
398 case NFS4_SET_TO_SERVER_TIME:
399 iattr->ia_valid |= ATTR_MTIME;
400 break;
401 default:
402 goto xdr_error;
403 }
404 }
18032ca0
DQ		 405
406 label->len = 0;
407#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
408 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
409 READ_BUF(4);
410 len += 4;
411 READ32(dummy32); /* lfs: we don't use it */
412 READ_BUF(4);
413 len += 4;
414 READ32(dummy32); /* pi: we don't use it either */
415 READ_BUF(4);
416 len += 4;
417 READ32(dummy32);
418 READ_BUF(dummy32);
419 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
420 return nfserr_badlabel;
421 len += (XDR_QUADLEN(dummy32) << 2);
422 READMEM(buf, dummy32);
423 label->data = kzalloc(dummy32 + 1, GFP_KERNEL);
424 if (!label->data)
425 return nfserr_jukebox;
3378b7f4 426 label->len = dummy32;
18032ca0
DQ		 427 defer_free(argp, kfree, label->data);
428 memcpy(label->data, buf, dummy32);
429 }
430#endif
431
3c8e0316
YZ		 432 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
433 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
434 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
435 READ_BUF(expected_len - len);
436 else if (len != expected_len)
1da177e4
LT		 437 goto xdr_error;
438
439 DECODE_TAIL;
1da177e4
LT		 440}
441
e31a1b66
BH		 442static __be32
443nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
444{
445 DECODE_HEAD;
446
447 READ_BUF(sizeof(stateid_t));
448 READ32(sid->si_generation);
449 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
450
451 DECODE_TAIL;
452}
453
b37ad28b 454static __be32
1da177e4
LT		 455nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
456{
457 DECODE_HEAD;
458
459 READ_BUF(4);
460 READ32(access->ac_req_access);
461
462 DECODE_TAIL;
463}
464
acb2887e
BF		 465static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
466{
467 DECODE_HEAD;
12fc3e92 468 u32 dummy, uid, gid;
acb2887e
BF		 469 char *machine_name;
470 int i;
471 int nr_secflavs;
472
473 /* callback_sec_params4 */
474 READ_BUF(4);
475 READ32(nr_secflavs);
57569a70
BF		 476 if (nr_secflavs)
477 cbs->flavor = (u32)(-1);
478 else
479 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
480 cbs->flavor = 0;
acb2887e
BF		 481 for (i = 0; i < nr_secflavs; ++i) {
482 READ_BUF(4);
483 READ32(dummy);
484 switch (dummy) {
485 case RPC_AUTH_NULL:
486 /* Nothing to read */
12fc3e92
BF		 487 if (cbs->flavor == (u32)(-1))
488 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 489 break;
490 case RPC_AUTH_UNIX:
491 READ_BUF(8);
492 /* stamp */
493 READ32(dummy);
494
495 /* machine name */
496 READ32(dummy);
497 READ_BUF(dummy);
498 SAVEMEM(machine_name, dummy);
499
500 /* uid, gid */
501 READ_BUF(8);
12fc3e92
BF		 502 READ32(uid);
503 READ32(gid);
acb2887e
BF		 504
505 /* more gids */
506 READ_BUF(4);
507 READ32(dummy);
508 READ_BUF(dummy * 4);
12fc3e92 509 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 510 kuid_t kuid = make_kuid(&init_user_ns, uid);
511 kgid_t kgid = make_kgid(&init_user_ns, gid);
512 if (uid_valid(kuid) && gid_valid(kgid)) {
513 cbs->uid = kuid;
514 cbs->gid = kgid;
515 cbs->flavor = RPC_AUTH_UNIX;
516 } else {
517 dprintk("RPC_AUTH_UNIX with invalid"
518 "uid or gid ignoring!\n");
519 }
12fc3e92 520 }
acb2887e
BF		 521 break;
522 case RPC_AUTH_GSS:
523 dprintk("RPC_AUTH_GSS callback secflavor "
524 "not supported!\n");
525 READ_BUF(8);
526 /* gcbp_service */
527 READ32(dummy);
528 /* gcbp_handle_from_server */
529 READ32(dummy);
530 READ_BUF(dummy);
531 p += XDR_QUADLEN(dummy);
532 /* gcbp_handle_from_client */
533 READ_BUF(4);
534 READ32(dummy);
535 READ_BUF(dummy);
536 break;
537 default:
538 dprintk("Illegal callback secflavor\n");
539 return nfserr_inval;
540 }
541 }
542 DECODE_TAIL;
543}
544
cb73a9f4
BF		 545static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
546{
547 DECODE_HEAD;
548
549 READ_BUF(4);
550 READ32(bc->bc_cb_program);
551 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
552
553 DECODE_TAIL;
554}
555
1d1bc8f2
BF		 556static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
557{
558 DECODE_HEAD;
1d1bc8f2
BF		 559
560 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
561 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
562 READ32(bcts->dir);
6ce2357f
BS		 563 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
564 * could help us figure out we should be using it. */
1d1bc8f2
BF		 565 DECODE_TAIL;
566}
567
b37ad28b 568static __be32
1da177e4
LT		 569nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
570{
571 DECODE_HEAD;
572
e31a1b66 573 READ_BUF(4);
1da177e4 574 READ32(close->cl_seqid);
e31a1b66 575 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 576
577 DECODE_TAIL;
578}
579
580
b37ad28b 581static __be32
1da177e4
LT		 582nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
583{
584 DECODE_HEAD;
585
586 READ_BUF(12);
587 READ64(commit->co_offset);
588 READ32(commit->co_count);
589
590 DECODE_TAIL;
591}
592
b37ad28b 593static __be32
1da177e4
LT		 594nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
595{
596 DECODE_HEAD;
597
598 READ_BUF(4);
599 READ32(create->cr_type);
600 switch (create->cr_type) {
601 case NF4LNK:
602 READ_BUF(4);
603 READ32(create->cr_linklen);
604 READ_BUF(create->cr_linklen);
605 SAVEMEM(create->cr_linkname, create->cr_linklen);
606 break;
607 case NF4BLK:
608 case NF4CHR:
609 READ_BUF(8);
610 READ32(create->cr_specdata1);
611 READ32(create->cr_specdata2);
612 break;
613 case NF4SOCK:
614 case NF4FIFO:
615 case NF4DIR:
616 default:
617 break;
618 }
619
620 READ_BUF(4);
621 READ32(create->cr_namelen);
622 READ_BUF(create->cr_namelen);
623 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 624 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 625 return status;
626
3c8e0316 627 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
18032ca0 628 &create->cr_acl, &create->cr_label);
c0d6fc8a 629 if (status)
1da177e4
LT		 630 goto out;
631
632 DECODE_TAIL;
633}
634
b37ad28b 635static inline __be32
1da177e4
LT		 636nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
637{
e31a1b66 638 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 639}
640
b37ad28b 641static inline __be32
1da177e4
LT		 642nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
643{
644 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
645}
646
b37ad28b 647static __be32
1da177e4
LT		 648nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
649{
650 DECODE_HEAD;
651
652 READ_BUF(4);
653 READ32(link->li_namelen);
654 READ_BUF(link->li_namelen);
655 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 656 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 657 return status;
658
659 DECODE_TAIL;
660}
661
b37ad28b 662static __be32
1da177e4
LT		 663nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
664{
665 DECODE_HEAD;
666
1da177e4
LT		 667 /*
668 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
669 */
670 READ_BUF(28);
671 READ32(lock->lk_type);
672 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
673 goto xdr_error;
674 READ32(lock->lk_reclaim);
675 READ64(lock->lk_offset);
676 READ64(lock->lk_length);
677 READ32(lock->lk_is_new);
678
679 if (lock->lk_is_new) {
e31a1b66 680 READ_BUF(4);
1da177e4 681 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 682 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
683 if (status)
684 return status;
685 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 686 READ32(lock->lk_new_lock_seqid);
687 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
688 READ32(lock->lk_new_owner.len);
689 READ_BUF(lock->lk_new_owner.len);
690 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
691 } else {
e31a1b66
BH		 692 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
693 if (status)
694 return status;
695 READ_BUF(4);
1da177e4
LT		 696 READ32(lock->lk_old_lock_seqid);
697 }
698
699 DECODE_TAIL;
700}
701
b37ad28b 702static __be32
1da177e4
LT		 703nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
704{
705 DECODE_HEAD;
706
707 READ_BUF(32);
708 READ32(lockt->lt_type);
709 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
710 goto xdr_error;
711 READ64(lockt->lt_offset);
712 READ64(lockt->lt_length);
713 COPYMEM(&lockt->lt_clientid, 8);
714 READ32(lockt->lt_owner.len);
715 READ_BUF(lockt->lt_owner.len);
716 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
717
718 DECODE_TAIL;
719}
720
b37ad28b 721static __be32
1da177e4
LT		 722nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
723{
724 DECODE_HEAD;
725
e31a1b66 726 READ_BUF(8);
1da177e4
LT		 727 READ32(locku->lu_type);
728 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
729 goto xdr_error;
730 READ32(locku->lu_seqid);
e31a1b66
BH		 731 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
732 if (status)
733 return status;
734 READ_BUF(16);
1da177e4
LT		 735 READ64(locku->lu_offset);
736 READ64(locku->lu_length);
737
738 DECODE_TAIL;
739}
740
b37ad28b 741static __be32
1da177e4
LT		 742nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
743{
744 DECODE_HEAD;
745
746 READ_BUF(4);
747 READ32(lookup->lo_len);
748 READ_BUF(lookup->lo_len);
749 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 750 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 751 return status;
752
753 DECODE_TAIL;
754}
755
2c8bd7e0 756static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 757{
758 __be32 *p;
759 u32 w;
760
761 READ_BUF(4);
762 READ32(w);
2c8bd7e0
BH		 763 *share_access = w & NFS4_SHARE_ACCESS_MASK;
764 *deleg_want = w & NFS4_SHARE_WANT_MASK;
765 if (deleg_when)
766 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
767
04f9e664
BF		 768 switch (w & NFS4_SHARE_ACCESS_MASK) {
769 case NFS4_SHARE_ACCESS_READ:
770 case NFS4_SHARE_ACCESS_WRITE:
771 case NFS4_SHARE_ACCESS_BOTH:
772 break;
773 default:
774 return nfserr_bad_xdr;
775 }
fc0d14fe 776 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 777 if (!w)
778 return nfs_ok;
779 if (!argp->minorversion)
780 return nfserr_bad_xdr;
781 switch (w & NFS4_SHARE_WANT_MASK) {
782 case NFS4_SHARE_WANT_NO_PREFERENCE:
783 case NFS4_SHARE_WANT_READ_DELEG:
784 case NFS4_SHARE_WANT_WRITE_DELEG:
785 case NFS4_SHARE_WANT_ANY_DELEG:
786 case NFS4_SHARE_WANT_NO_DELEG:
787 case NFS4_SHARE_WANT_CANCEL:
788 break;
789 default:
790 return nfserr_bad_xdr;
791 }
92bac8c5 792 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 793 if (!w)
794 return nfs_ok;
2c8bd7e0
BH		 795
796 if (!deleg_when) /* open_downgrade */
797 return nfserr_inval;
04f9e664
BF		 798 switch (w) {
799 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
800 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 801 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
802 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 803 return nfs_ok;
804 }
805xdr_error:
806 return nfserr_bad_xdr;
807}
808
809static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
810{
811 __be32 *p;
812
813 READ_BUF(4);
814 READ32(*x);
815 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 816 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 817 return nfserr_bad_xdr;
818 return nfs_ok;
819xdr_error:
820 return nfserr_bad_xdr;
821}
822
a084daf5
BF		 823static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
824{
825 __be32 *p;
826
827 READ_BUF(4);
828 READ32(o->len);
829
830 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
831 return nfserr_bad_xdr;
832
833 READ_BUF(o->len);
834 SAVEMEM(o->data, o->len);
835 return nfs_ok;
836xdr_error:
837 return nfserr_bad_xdr;
838}
839
b37ad28b 840static __be32
1da177e4
LT		 841nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
842{
843 DECODE_HEAD;
2c8bd7e0 844 u32 dummy;
1da177e4
LT		 845
846 memset(open->op_bmval, 0, sizeof(open->op_bmval));
847 open->op_iattr.ia_valid = 0;
fe0750e5 848 open->op_openowner = NULL;
1da177e4 849
9d313b17 850 open->op_xdr_error = 0;
1da177e4 851 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 852 READ_BUF(4);
1da177e4 853 READ32(open->op_seqid);
2c8bd7e0
BH		 854 /* decode, yet ignore deleg_when until supported */
855 status = nfsd4_decode_share_access(argp, &open->op_share_access,
856 &open->op_deleg_want, &dummy);
04f9e664
BF		 857 if (status)
858 goto xdr_error;
859 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
860 if (status)
861 goto xdr_error;
a084daf5 862 READ_BUF(sizeof(clientid_t));
1da177e4 863 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 864 status = nfsd4_decode_opaque(argp, &open->op_owner);
865 if (status)
866 goto xdr_error;
867 READ_BUF(4);
1da177e4
LT		 868 READ32(open->op_create);
869 switch (open->op_create) {
870 case NFS4_OPEN_NOCREATE:
871 break;
872 case NFS4_OPEN_CREATE:
873 READ_BUF(4);
874 READ32(open->op_createmode);
875 switch (open->op_createmode) {
876 case NFS4_CREATE_UNCHECKED:
877 case NFS4_CREATE_GUARDED:
c0d6fc8a 878 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 879 &open->op_iattr, &open->op_acl, &open->op_label);
c0d6fc8a 880 if (status)
1da177e4
LT		 881 goto out;
882 break;
883 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 884 READ_BUF(NFS4_VERIFIER_SIZE);
885 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 886 break;
79fb54ab
BH		 887 case NFS4_CREATE_EXCLUSIVE4_1:
888 if (argp->minorversion < 1)
889 goto xdr_error;
ab4684d1
CL		 890 READ_BUF(NFS4_VERIFIER_SIZE);
891 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 892 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 893 &open->op_iattr, &open->op_acl, &open->op_label);
79fb54ab
BH		 894 if (status)
895 goto out;
896 break;
1da177e4
LT		 897 default:
898 goto xdr_error;
899 }
900 break;
901 default:
902 goto xdr_error;
903 }
904
905 /* open_claim */
906 READ_BUF(4);
907 READ32(open->op_claim_type);
908 switch (open->op_claim_type) {
909 case NFS4_OPEN_CLAIM_NULL:
910 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
911 READ_BUF(4);
912 READ32(open->op_fname.len);
913 READ_BUF(open->op_fname.len);
914 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 915 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 916 return status;
917 break;
918 case NFS4_OPEN_CLAIM_PREVIOUS:
919 READ_BUF(4);
920 READ32(open->op_delegate_type);
921 break;
922 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 923 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
924 if (status)
925 return status;
926 READ_BUF(4);
1da177e4
LT		 927 READ32(open->op_fname.len);
928 READ_BUF(open->op_fname.len);
929 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 930 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 931 return status;
932 break;
8b289b2c
BF		 933 case NFS4_OPEN_CLAIM_FH:
934 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
935 if (argp->minorversion < 1)
936 goto xdr_error;
937 /* void */
938 break;
939 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
940 if (argp->minorversion < 1)
941 goto xdr_error;
942 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
943 if (status)
944 return status;
945 break;
1da177e4
LT		 946 default:
947 goto xdr_error;
948 }
949
950 DECODE_TAIL;
951}
952
b37ad28b 953static __be32
1da177e4
LT		 954nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
955{
956 DECODE_HEAD;
e1a90ebd
AS		 957
958 if (argp->minorversion >= 1)
959 return nfserr_notsupp;
960
e31a1b66
BH		 961 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
962 if (status)
963 return status;
964 READ_BUF(4);
1da177e4 965 READ32(open_conf->oc_seqid);
e1a90ebd 966
1da177e4
LT		 967 DECODE_TAIL;
968}
969
b37ad28b 970static __be32
1da177e4
LT		 971nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
972{
973 DECODE_HEAD;
974
e31a1b66
BH		 975 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
976 if (status)
977 return status;
04f9e664 978 READ_BUF(4);
1da177e4 979 READ32(open_down->od_seqid);
2c8bd7e0
BH		 980 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
981 &open_down->od_deleg_want, NULL);
04f9e664
BF		 982 if (status)
983 return status;
984 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
985 if (status)
986 return status;
1da177e4
LT		 987 DECODE_TAIL;
988}
989
b37ad28b 990static __be32
1da177e4
LT		 991nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
992{
993 DECODE_HEAD;
994
995 READ_BUF(4);
996 READ32(putfh->pf_fhlen);
997 if (putfh->pf_fhlen > NFS4_FHSIZE)
998 goto xdr_error;
999 READ_BUF(putfh->pf_fhlen);
1000 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1001
1002 DECODE_TAIL;
1003}
1004
e1a90ebd
AS		 1005static __be32
1006nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1007{
1008 if (argp->minorversion == 0)
1009 return nfs_ok;
1010 return nfserr_notsupp;
1011}
1012
b37ad28b 1013static __be32
1da177e4
LT		 1014nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1015{
1016 DECODE_HEAD;
1017
e31a1b66
BH		 1018 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1019 if (status)
1020 return status;
1021 READ_BUF(12);
1da177e4
LT		 1022 READ64(read->rd_offset);
1023 READ32(read->rd_length);
1024
1025 DECODE_TAIL;
1026}
1027
b37ad28b 1028static __be32
1da177e4
LT		 1029nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1030{
1031 DECODE_HEAD;
1032
1033 READ_BUF(24);
1034 READ64(readdir->rd_cookie);
1035 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
3b299709 1036 READ32(readdir->rd_dircount);
1da177e4
LT		 1037 READ32(readdir->rd_maxcount);
1038 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1039 goto out;
1040
1041 DECODE_TAIL;
1042}
1043
b37ad28b 1044static __be32
1da177e4
LT		 1045nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1046{
1047 DECODE_HEAD;
1048
1049 READ_BUF(4);
1050 READ32(remove->rm_namelen);
1051 READ_BUF(remove->rm_namelen);
1052 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1053 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1054 return status;
1055
1056 DECODE_TAIL;
1057}
1058
b37ad28b 1059static __be32
1da177e4
LT		 1060nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1061{
1062 DECODE_HEAD;
1063
1064 READ_BUF(4);
1065 READ32(rename->rn_snamelen);
1066 READ_BUF(rename->rn_snamelen + 4);
1067 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1068 READ32(rename->rn_tnamelen);
1069 READ_BUF(rename->rn_tnamelen);
1070 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1071 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1072 return status;
a36b1725 1073 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1074 return status;
1075
1076 DECODE_TAIL;
1077}
1078
b37ad28b 1079static __be32
1da177e4
LT		 1080nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1081{
1082 DECODE_HEAD;
1083
e1a90ebd
AS		 1084 if (argp->minorversion >= 1)
1085 return nfserr_notsupp;
1086
1da177e4
LT		 1087 READ_BUF(sizeof(clientid_t));
1088 COPYMEM(clientid, sizeof(clientid_t));
1089
1090 DECODE_TAIL;
1091}
1092
dcb488a3
AA		 1093static __be32
1094nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1095 struct nfsd4_secinfo *secinfo)
1096{
1097 DECODE_HEAD;
1098
1099 READ_BUF(4);
1100 READ32(secinfo->si_namelen);
1101 READ_BUF(secinfo->si_namelen);
1102 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1103 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1104 if (status)
1105 return status;
1106 DECODE_TAIL;
1107}
1108
04f4ad16
BF		 1109static __be32
1110nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1111 struct nfsd4_secinfo_no_name *sin)
1112{
1113 DECODE_HEAD;
1114
1115 READ_BUF(4);
1116 READ32(sin->sin_style);
1117 DECODE_TAIL;
1118}
1119
b37ad28b 1120static __be32
1da177e4
LT		 1121nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1122{
e31a1b66 1123 __be32 status;
1da177e4 1124
e31a1b66
BH		 1125 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1126 if (status)
1127 return status;
3c8e0316 1128 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
18032ca0 1129 &setattr->sa_acl, &setattr->sa_label);
1da177e4
LT		 1130}
1131
b37ad28b 1132static __be32
1da177e4
LT		 1133nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1134{
1135 DECODE_HEAD;
1136
e1a90ebd
AS		 1137 if (argp->minorversion >= 1)
1138 return nfserr_notsupp;
1139
ab4684d1
CL		 1140 READ_BUF(NFS4_VERIFIER_SIZE);
1141 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1142
a084daf5
BF		 1143 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1144 if (status)
1145 return nfserr_bad_xdr;
1146 READ_BUF(8);
1da177e4
LT		 1147 READ32(setclientid->se_callback_prog);
1148 READ32(setclientid->se_callback_netid_len);
1149
1150 READ_BUF(setclientid->se_callback_netid_len + 4);
1151 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1152 READ32(setclientid->se_callback_addr_len);
1153
1154 READ_BUF(setclientid->se_callback_addr_len + 4);
1155 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1156 READ32(setclientid->se_callback_ident);
1157
1158 DECODE_TAIL;
1159}
1160
b37ad28b 1161static __be32
1da177e4
LT		 1162nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1163{
1164 DECODE_HEAD;
1165
e1a90ebd
AS		 1166 if (argp->minorversion >= 1)
1167 return nfserr_notsupp;
1168
ab4684d1 1169 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1170 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1171 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1172
1173 DECODE_TAIL;
1174}
1175
1176/* Also used for NVERIFY */
b37ad28b 1177static __be32
1da177e4
LT		 1178nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1179{
1da177e4
LT		 1180 DECODE_HEAD;
1181
1182 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1183 goto out;
1184
1185 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1186 * nfsd4_proc_verify */
1187
1da177e4
LT		 1188 READ_BUF(4);
1189 READ32(verify->ve_attrlen);
1190 READ_BUF(verify->ve_attrlen);
1191 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1192
1193 DECODE_TAIL;
1194}
1195
b37ad28b 1196static __be32
1da177e4
LT		 1197nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1198{
1199 int avail;
1da177e4
LT		 1200 int len;
1201 DECODE_HEAD;
1202
e31a1b66
BH		 1203 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1204 if (status)
1205 return status;
1206 READ_BUF(16);
1da177e4
LT		 1207 READ64(write->wr_offset);
1208 READ32(write->wr_stable_how);
1209 if (write->wr_stable_how > 2)
1210 goto xdr_error;
1211 READ32(write->wr_buflen);
1212
1213 /* Sorry .. no magic macros for this.. *
1214 * READ_BUF(write->wr_buflen);
1215 * SAVEMEM(write->wr_buf, write->wr_buflen);
1216 */
1217 avail = (char*)argp->end - (char*)argp->p;
1218 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1219 dprintk("NFSD: xdr error (%s:%d)\n",
1220 __FILE__, __LINE__);
1da177e4
LT		 1221 goto xdr_error;
1222 }
70cc7f75
BF		 1223 write->wr_head.iov_base = p;
1224 write->wr_head.iov_len = avail;
70cc7f75 1225 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1226
1227 len = XDR_QUADLEN(write->wr_buflen) << 2;
1228 if (len >= avail) {
1229 int pages;
1230
1231 len -= avail;
1232
1233 pages = len >> PAGE_SHIFT;
1234 argp->pagelist += pages;
1235 argp->pagelen -= pages * PAGE_SIZE;
1236 len -= pages * PAGE_SIZE;
1237
1238 argp->p = (__be32 *)page_address(argp->pagelist[0]);
365da4ad 1239 argp->pagelist++;
5a80a54d 1240 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1241 }
5a80a54d 1242 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1243
1244 DECODE_TAIL;
1245}
1246
b37ad28b 1247static __be32
1da177e4
LT		 1248nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1249{
1250 DECODE_HEAD;
1251
e1a90ebd
AS		 1252 if (argp->minorversion >= 1)
1253 return nfserr_notsupp;
1254
1da177e4
LT		 1255 READ_BUF(12);
1256 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1257 READ32(rlockowner->rl_owner.len);
1258 READ_BUF(rlockowner->rl_owner.len);
1259 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1260
60adfc50
AA		 1261 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1262 return nfserr_inval;
1da177e4
LT		 1263 DECODE_TAIL;
1264}
1265
2db134eb
AA		 1266static __be32
1267nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1268 struct nfsd4_exchange_id *exid)
2db134eb 1269{
5afa040b 1270 int dummy, tmp;
0733d213
AA		 1271 DECODE_HEAD;
1272
1273 READ_BUF(NFS4_VERIFIER_SIZE);
1274 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1275
a084daf5
BF		 1276 status = nfsd4_decode_opaque(argp, &exid->clname);
1277 if (status)
1278 return nfserr_bad_xdr;
0733d213
AA		 1279
1280 READ_BUF(4);
1281 READ32(exid->flags);
1282
1283 /* Ignore state_protect4_a */
1284 READ_BUF(4);
1285 READ32(exid->spa_how);
1286 switch (exid->spa_how) {
1287 case SP4_NONE:
1288 break;
1289 case SP4_MACH_CRED:
1290 /* spo_must_enforce */
1291 READ_BUF(4);
1292 READ32(dummy);
1293 READ_BUF(dummy * 4);
1294 p += dummy;
1295
1296 /* spo_must_allow */
1297 READ_BUF(4);
1298 READ32(dummy);
1299 READ_BUF(dummy * 4);
1300 p += dummy;
1301 break;
1302 case SP4_SSV:
1303 /* ssp_ops */
1304 READ_BUF(4);
1305 READ32(dummy);
1306 READ_BUF(dummy * 4);
1307 p += dummy;
1308
1309 READ_BUF(4);
1310 READ32(dummy);
1311 READ_BUF(dummy * 4);
1312 p += dummy;
1313
1314 /* ssp_hash_algs<> */
1315 READ_BUF(4);
5afa040b
MJ		 1316 READ32(tmp);
1317 while (tmp--) {
1318 READ_BUF(4);
1319 READ32(dummy);
1320 READ_BUF(dummy);
1321 p += XDR_QUADLEN(dummy);
1322 }
0733d213
AA		 1323
1324 /* ssp_encr_algs<> */
1325 READ_BUF(4);
5afa040b
MJ		 1326 READ32(tmp);
1327 while (tmp--) {
1328 READ_BUF(4);
1329 READ32(dummy);
1330 READ_BUF(dummy);
1331 p += XDR_QUADLEN(dummy);
1332 }
0733d213
AA		 1333
1334 /* ssp_window and ssp_num_gss_handles */
1335 READ_BUF(8);
1336 READ32(dummy);
1337 READ32(dummy);
1338 break;
1339 default:
1340 goto xdr_error;
1341 }
1342
1343 /* Ignore Implementation ID */
1344 READ_BUF(4); /* nfs_impl_id4 array length */
1345 READ32(dummy);
1346
1347 if (dummy > 1)
1348 goto xdr_error;
1349
1350 if (dummy == 1) {
1351 /* nii_domain */
1352 READ_BUF(4);
1353 READ32(dummy);
1354 READ_BUF(dummy);
1355 p += XDR_QUADLEN(dummy);
1356
1357 /* nii_name */
1358 READ_BUF(4);
1359 READ32(dummy);
1360 READ_BUF(dummy);
1361 p += XDR_QUADLEN(dummy);
1362
1363 /* nii_date */
1364 READ_BUF(12);
1365 p += 3;
1366 }
1367 DECODE_TAIL;
2db134eb
AA		 1368}
1369
1370static __be32
1371nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1372 struct nfsd4_create_session *sess)
1373{
ec6b5d7b 1374 DECODE_HEAD;
ec6b5d7b 1375 u32 dummy;
ec6b5d7b
AA		 1376
1377 READ_BUF(16);
1378 COPYMEM(&sess->clientid, 8);
1379 READ32(sess->seqid);
1380 READ32(sess->flags);
1381
1382 /* Fore channel attrs */
1383 READ_BUF(28);
1384 READ32(dummy); /* headerpadsz is always 0 */
1385 READ32(sess->fore_channel.maxreq_sz);
1386 READ32(sess->fore_channel.maxresp_sz);
1387 READ32(sess->fore_channel.maxresp_cached);
1388 READ32(sess->fore_channel.maxops);
1389 READ32(sess->fore_channel.maxreqs);
1390 READ32(sess->fore_channel.nr_rdma_attrs);
1391 if (sess->fore_channel.nr_rdma_attrs == 1) {
1392 READ_BUF(4);
1393 READ32(sess->fore_channel.rdma_attrs);
1394 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1395 dprintk("Too many fore channel attr bitmaps!\n");
1396 goto xdr_error;
1397 }
1398
1399 /* Back channel attrs */
1400 READ_BUF(28);
1401 READ32(dummy); /* headerpadsz is always 0 */
1402 READ32(sess->back_channel.maxreq_sz);
1403 READ32(sess->back_channel.maxresp_sz);
1404 READ32(sess->back_channel.maxresp_cached);
1405 READ32(sess->back_channel.maxops);
1406 READ32(sess->back_channel.maxreqs);
1407 READ32(sess->back_channel.nr_rdma_attrs);
1408 if (sess->back_channel.nr_rdma_attrs == 1) {
1409 READ_BUF(4);
1410 READ32(sess->back_channel.rdma_attrs);
1411 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1412 dprintk("Too many back channel attr bitmaps!\n");
1413 goto xdr_error;
1414 }
1415
acb2887e 1416 READ_BUF(4);
ec6b5d7b 1417 READ32(sess->callback_prog);
acb2887e 1418 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1419 DECODE_TAIL;
2db134eb
AA		 1420}
1421
1422static __be32
1423nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1424 struct nfsd4_destroy_session *destroy_session)
1425{
e10e0cfc
BH		 1426 DECODE_HEAD;
1427 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1428 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1429
1430 DECODE_TAIL;
2db134eb
AA		 1431}
1432
e1ca12df
BS		 1433static __be32
1434nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1435 struct nfsd4_free_stateid *free_stateid)
1436{
1437 DECODE_HEAD;
1438
1439 READ_BUF(sizeof(stateid_t));
1440 READ32(free_stateid->fr_stateid.si_generation);
1441 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1442
1443 DECODE_TAIL;
1444}
1445
2db134eb
AA		 1446static __be32
1447nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1448 struct nfsd4_sequence *seq)
1449{
b85d4c01
BH		 1450 DECODE_HEAD;
1451
1452 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1453 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1454 READ32(seq->seqid);
1455 READ32(seq->slotid);
1456 READ32(seq->maxslots);
1457 READ32(seq->cachethis);
1458
1459 DECODE_TAIL;
2db134eb
AA		 1460}
1461
17456804
BS		 1462static __be32
1463nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1464{
17456804 1465 int i;
03cfb420
BS		 1466 __be32 *p, status;
1467 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1468
1469 READ_BUF(4);
1470 test_stateid->ts_num_ids = ntohl(*p++);
1471
03cfb420 1472 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1473
1474 for (i = 0; i < test_stateid->ts_num_ids; i++) {
03cfb420
BS		 1475 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1476 if (!stateid) {
afcf6792 1477 status = nfserrno(-ENOMEM);
03cfb420
BS		 1478 goto out;
1479 }
1480
1481 defer_free(argp, kfree, stateid);
1482 INIT_LIST_HEAD(&stateid->ts_id_list);
1483 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1484
1485 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1486 if (status)
03cfb420 1487 goto out;
17456804
BS		 1488 }
1489
1490 status = 0;
1491out:
1492 return status;
1493xdr_error:
1494 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1495 status = nfserr_bad_xdr;
1496 goto out;
1497}
1498
345c2842
MJ		 1499static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1500{
1501 DECODE_HEAD;
1502
1503 READ_BUF(8);
1504 COPYMEM(&dc->clientid, 8);
1505
1506 DECODE_TAIL;
1507}
1508
4dc6ec00
BF		 1509static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1510{
1511 DECODE_HEAD;
1512
1513 READ_BUF(4);
1514 READ32(rc->rca_one_fs);
1515
1516 DECODE_TAIL;
1517}
1518
347e0ad9
BH		 1519static __be32
1520nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1521{
1522 return nfs_ok;
1523}
1524
3c375c6f
BH		 1525static __be32
1526nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1527{
1e685ec2 1528 return nfserr_notsupp;
3c375c6f
BH		 1529}
1530
347e0ad9
BH		 1531typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1532
1533static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1534 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1535 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1536 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1537 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1538 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1539 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1540 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1541 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1542 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1543 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1544 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1545 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1546 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1547 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1548 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1549 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1550 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1551 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1552 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1553 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1554 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1555 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1556 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1557 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1558 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1559 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1560 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1561 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1562 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1563 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1564 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1565 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1566 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1567 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1568 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1569 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1570 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1571
1572 /* new operations for NFSv4.1 */
cb73a9f4 1573 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1574 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1575 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1576 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1577 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1578 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1579 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1580 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1581 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1582 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1583 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1584 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1585 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1586 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1587 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1588 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1589 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1590 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1591 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1592};
1593
e1a90ebd
AS		 1594static inline bool
1595nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1596{
8217d146 1597 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1598 return false;
8217d146 1599 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1600 return false;
8217d146
AS		 1601 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1602 return false;
1603 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1604 return false;
1605 return true;
1606}
f2feb96b 1607
b37ad28b 1608static __be32
1da177e4
LT		 1609nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1610{
1611 DECODE_HEAD;
1612 struct nfsd4_op *op;
1091006c 1613 bool cachethis = false;
4f0cefbf 1614 int max_reply = 2 * RPC_MAX_AUTH_SIZE + 8; /* opcnt, status */
b0e35fda
BF		 1615 int readcount = 0;
1616 int readbytes = 0;
1da177e4
LT		 1617 int i;
1618
1da177e4
LT		 1619 READ_BUF(4);
1620 READ32(argp->taglen);
1621 READ_BUF(argp->taglen + 8);
1622 SAVEMEM(argp->tag, argp->taglen);
1623 READ32(argp->minorversion);
1624 READ32(argp->opcnt);
4f0cefbf 1625 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 1626
1627 if (argp->taglen > NFSD4_MAX_TAGLEN)
1628 goto xdr_error;
1629 if (argp->opcnt > 100)
1630 goto xdr_error;
1631
e8c96f8c 1632 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1633 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1634 if (!argp->ops) {
1635 argp->ops = argp->iops;
817cb9d4 1636 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1637 goto xdr_error;
1638 }
1639 }
1640
e1a90ebd 1641 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1642 argp->opcnt = 0;
1643
1da177e4
LT		 1644 for (i = 0; i < argp->opcnt; i++) {
1645 op = &argp->ops[i];
1646 op->replay = NULL;
1647
8a61b18c
BF		 1648 READ_BUF(4);
1649 READ32(op->opnum);
1da177e4 1650
e1a90ebd
AS		 1651 if (nfsd4_opnum_in_range(argp, op))
1652 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1653 else {
1da177e4
LT		 1654 op->opnum = OP_ILLEGAL;
1655 op->status = nfserr_op_illegal;
1da177e4 1656 }
1091006c
BF		 1657 /*
1658 * We'll try to cache the result in the DRC if any one
1659 * op in the compound wants to be cached:
1660 */
1661 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 1662
b0e35fda
BF		 1663 if (op->opnum == OP_READ) {
1664 readcount++;
1665 readbytes += nfsd4_max_reply(argp->rqstp, op);
1666 } else
1667 max_reply += nfsd4_max_reply(argp->rqstp, op);
e372ba60
BF		 1668
1669 if (op->status) {
1670 argp->opcnt = i+1;
1671 break;
1672 }
1da177e4 1673 }
1091006c
BF		 1674 /* Sessions make the DRC unnecessary: */
1675 if (argp->minorversion)
1676 cachethis = false;
b0e35fda 1677 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 1678 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 1679
b0e35fda
BF		 1680 if (readcount > 1 || max_reply > PAGE_SIZE - 2*RPC_MAX_AUTH_SIZE)
1681 argp->rqstp->rq_splice_ok = false;
1682
1da177e4
LT		 1683 DECODE_TAIL;
1684}
1da177e4 1685
d05d5744 1686static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
c654b8a9
BF		 1687{
1688 if (IS_I_VERSION(inode)) {
d05d5744 1689 p = xdr_encode_hyper(p, inode->i_version);
c654b8a9 1690 } else {
d05d5744
BF		 1691 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1692 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
c654b8a9 1693 }
d05d5744 1694 return p;
c654b8a9
BF		 1695}
1696
d05d5744 1697static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 1698{
d05d5744 1699 *p++ = cpu_to_be32(c->atomic);
c654b8a9 1700 if (c->change_supported) {
d05d5744
BF		 1701 p = xdr_encode_hyper(p, c->before_change);
1702 p = xdr_encode_hyper(p, c->after_change);
c654b8a9 1703 } else {
d05d5744
BF		 1704 *p++ = cpu_to_be32(c->before_ctime_sec);
1705 *p++ = cpu_to_be32(c->before_ctime_nsec);
1706 *p++ = cpu_to_be32(c->after_ctime_sec);
1707 *p++ = cpu_to_be32(c->after_ctime_nsec);
c654b8a9 1708 }
d05d5744 1709 return p;
c654b8a9 1710}
1da177e4 1711
81c3f413 1712/* Encode as an array of strings the string given with components
e7a0444a 1713 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1714 */
ddd1ea56
BF		 1715static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1716 char *components, char esc_enter,
1717 char esc_exit)
81c3f413 1718{
ddd1ea56 1719 __be32 *p;
082d4bd7
BF		 1720 __be32 pathlen;
1721 int pathlen_offset;
81c3f413 1722 int strlen, count=0;
e7a0444a 1723 char *str, *end, *next;
81c3f413
BF		 1724
1725 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 1726
1727 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 1728 p = xdr_reserve_space(xdr, 4);
1729 if (!p)
81c3f413 1730 return nfserr_resource;
082d4bd7
BF		 1731 p++; /* We will fill this in with @count later */
1732
81c3f413
BF		 1733 end = str = components;
1734 while (*end) {
e7a0444a
WAA		 1735 bool found_esc = false;
1736
1737 /* try to parse as esc_start, ..., esc_end, sep */
1738 if (*str == esc_enter) {
1739 for (; *end && (*end != esc_exit); end++)
1740 /* find esc_exit or end of string */;
1741 next = end + 1;
1742 if (*end && (!*next || *next == sep)) {
1743 str++;
1744 found_esc = true;
1745 }
1746 }
1747
1748 if (!found_esc)
1749 for (; *end && (*end != sep); end++)
1750 /* find sep or end of string */;
1751
81c3f413
BF		 1752 strlen = end - str;
1753 if (strlen) {
ddd1ea56
BF		 1754 p = xdr_reserve_space(xdr, strlen + 4);
1755 if (!p)
81c3f413 1756 return nfserr_resource;
0c0c267b 1757 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 1758 count++;
1759 }
1760 else
1761 end++;
1762 str = end;
1763 }
082d4bd7
BF		 1764 pathlen = htonl(xdr->buf->len - pathlen_offset);
1765 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 1766 return 0;
1767}
1768
e7a0444a
WAA		 1769/* Encode as an array of strings the string given with components
1770 * separated @sep.
1771 */
ddd1ea56
BF		 1772static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1773 char *components)
e7a0444a 1774{
ddd1ea56 1775 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 1776}
1777
81c3f413
BF		 1778/*
1779 * encode a location element of a fs_locations structure
1780 */
ddd1ea56
BF		 1781static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1782 struct nfsd4_fs_location *location)
81c3f413 1783{
b37ad28b 1784 __be32 status;
81c3f413 1785
ddd1ea56 1786 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 1787 '[', ']');
81c3f413
BF		 1788 if (status)
1789 return status;
ddd1ea56 1790 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 1791 if (status)
1792 return status;
81c3f413
BF		 1793 return 0;
1794}
1795
1796/*
ed748aac 1797 * Encode a path in RFC3530 'pathname4' format
81c3f413 1798 */
ddd1ea56
BF		 1799static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1800 const struct path *root,
1801 const struct path *path)
81c3f413 1802{
301f0268 1803 struct path cur = *path;
ddd1ea56 1804 __be32 *p;
ed748aac
TM		 1805 struct dentry **components = NULL;
1806 unsigned int ncomponents = 0;
1807 __be32 err = nfserr_jukebox;
81c3f413 1808
ed748aac 1809 dprintk("nfsd4_encode_components(");
81c3f413 1810
ed748aac
TM		 1811 path_get(&cur);
1812 /* First walk the path up to the nfsd root, and store the
1813 * dentries/path components in an array.
1814 */
1815 for (;;) {
1816 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1817 break;
1818 if (cur.dentry == cur.mnt->mnt_root) {
1819 if (follow_up(&cur))
1820 continue;
1821 goto out_free;
1822 }
1823 if ((ncomponents & 15) == 0) {
1824 struct dentry **new;
1825 new = krealloc(components,
1826 sizeof(*new) * (ncomponents + 16),
1827 GFP_KERNEL);
1828 if (!new)
1829 goto out_free;
1830 components = new;
1831 }
1832 components[ncomponents++] = cur.dentry;
1833 cur.dentry = dget_parent(cur.dentry);
1834 }
ddd1ea56
BF		 1835 err = nfserr_resource;
1836 p = xdr_reserve_space(xdr, 4);
1837 if (!p)
ed748aac 1838 goto out_free;
c373b0a4 1839 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 1840
1841 while (ncomponents) {
1842 struct dentry *dentry = components[ncomponents - 1];
301f0268 1843 unsigned int len;
ed748aac 1844
301f0268
AV		 1845 spin_lock(&dentry->d_lock);
1846 len = dentry->d_name.len;
ddd1ea56
BF		 1847 p = xdr_reserve_space(xdr, len + 4);
1848 if (!p) {
301f0268 1849 spin_unlock(&dentry->d_lock);
ed748aac 1850 goto out_free;
301f0268 1851 }
0c0c267b 1852 p = xdr_encode_opaque(p, dentry->d_name.name, len);
ed748aac 1853 dprintk("/%s", dentry->d_name.name);
301f0268 1854 spin_unlock(&dentry->d_lock);
ed748aac
TM		 1855 dput(dentry);
1856 ncomponents--;
81c3f413 1857 }
ed748aac 1858
ed748aac
TM		 1859 err = 0;
1860out_free:
1861 dprintk(")\n");
1862 while (ncomponents)
1863 dput(components[--ncomponents]);
1864 kfree(components);
1865 path_put(&cur);
1866 return err;
1867}
1868
ddd1ea56
BF		 1869static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
1870 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 1871{
1872 struct svc_export *exp_ps;
1873 __be32 res;
1874
1875 exp_ps = rqst_find_fsidzero_export(rqstp);
1876 if (IS_ERR(exp_ps))
1877 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 1878 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 1879 exp_put(exp_ps);
1880 return res;
81c3f413
BF		 1881}
1882
1883/*
1884 * encode a fs_locations structure
1885 */
ddd1ea56
BF		 1886static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
1887 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 1888{
b37ad28b 1889 __be32 status;
cc45f017 1890 int i;
ddd1ea56 1891 __be32 *p;
81c3f413 1892 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1893
ddd1ea56 1894 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 1895 if (status)
1896 return status;
ddd1ea56
BF		 1897 p = xdr_reserve_space(xdr, 4);
1898 if (!p)
81c3f413 1899 return nfserr_resource;
c373b0a4 1900 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 1901 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 1902 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 1903 if (status)
1904 return status;
1905 }
81c3f413
BF		 1906 return 0;
1907}
1da177e4 1908
3d2544b1
BF		 1909static u32 nfs4_file_type(umode_t mode)
1910{
1911 switch (mode & S_IFMT) {
1912 case S_IFIFO: return NF4FIFO;
1913 case S_IFCHR: return NF4CHR;
1914 case S_IFDIR: return NF4DIR;
1915 case S_IFBLK: return NF4BLK;
1916 case S_IFLNK: return NF4LNK;
1917 case S_IFREG: return NF4REG;
1918 case S_IFSOCK: return NF4SOCK;
1919 default: return NF4BAD;
1920 };
1921}
1da177e4 1922
b37ad28b 1923static inline __be32
ddd1ea56
BF		 1924nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1925 struct nfs4_ace *ace)
1da177e4 1926{
3554116d 1927 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 1928 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 1929 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 1930 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 1931 else
ddd1ea56 1932 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 1933}
1934
42ca0993
BF		 1935#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1936 FATTR4_WORD0_RDATTR_ERROR)
1937#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1938
18032ca0
DQ		 1939#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1940static inline __be32
ddd1ea56
BF		 1941nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1942 void *context, int len)
18032ca0 1943{
ddd1ea56 1944 __be32 *p;
18032ca0 1945
ddd1ea56
BF		 1946 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
1947 if (!p)
18032ca0
DQ		 1948 return nfserr_resource;
1949
1950 /*
1951 * For now we use a 0 here to indicate the null translation; in
1952 * the future we may place a call to translation code here.
1953 */
c373b0a4
BF		 1954 *p++ = cpu_to_be32(0); /* lfs */
1955 *p++ = cpu_to_be32(0); /* pi */
18032ca0 1956 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 1957 return 0;
1958}
1959#else
1960static inline __be32
ddd1ea56
BF		 1961nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1962 void *context, int len)
18032ca0
DQ		 1963{ return 0; }
1964#endif
1965
b37ad28b 1966static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1967{
1968 /* As per referral draft: */
1969 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1970 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1971 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1972 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1973 *rdattr_err = NFSERR_MOVED;
1974 else
1975 return nfserr_moved;
1976 }
1977 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1978 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1979 return 0;
1980}
1da177e4 1981
ae7095a7
BF		 1982
1983static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
1984{
1985 struct path path = exp->ex_path;
1986 int err;
1987
1988 path_get(&path);
1989 while (follow_up(&path)) {
1990 if (path.dentry != path.mnt->mnt_root)
1991 break;
1992 }
3dadecce 1993 err = vfs_getattr(&path, stat);
ae7095a7
BF		 1994 path_put(&path);
1995 return err;
1996}
1997
1da177e4
LT		 1998/*
1999 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2000 * ourselves.
1da177e4 2001 */
b37ad28b 2002__be32
d5184658
BF		 2003nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2004 struct svc_export *exp,
2005 struct dentry *dentry, u32 *bmval,
406a7ea9 2006 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2007{
2008 u32 bmval0 = bmval[0];
2009 u32 bmval1 = bmval[1];
7e705706 2010 u32 bmval2 = bmval[2];
1da177e4 2011 struct kstat stat;
d50e6136 2012 struct svc_fh *tempfh = NULL;
1da177e4 2013 struct kstatfs statfs;
ddd1ea56 2014 __be32 *p;
1fcea5b2 2015 int starting_len = xdr->buf->len;
082d4bd7
BF		 2016 int attrlen_offset;
2017 __be32 attrlen;
1da177e4
LT		 2018 u32 dummy;
2019 u64 dummy64;
42ca0993 2020 u32 rdattr_err = 0;
b37ad28b 2021 __be32 status;
b8dd7b9a 2022 int err;
1da177e4
LT		 2023 int aclsupport = 0;
2024 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2025 void *context = NULL;
2026 int contextlen;
2027 bool contextsupport = false;
7e705706
AA		 2028 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2029 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2030 struct path path = {
2031 .mnt = exp->ex_path.mnt,
2032 .dentry = dentry,
2033 };
3d733711 2034 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2035
2036 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2037 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2038 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2039 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2040
42ca0993 2041 if (exp->ex_fslocs.migrated) {
7e705706 2042 BUG_ON(bmval[2]);
42ca0993
BF		 2043 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2044 if (status)
2045 goto out;
2046 }
2047
3dadecce 2048 err = vfs_getattr(&path, &stat);
b8dd7b9a 2049 if (err)
1da177e4 2050 goto out_nfserr;
a16e92ed
BF		 2051 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2052 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2053 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2054 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2055 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2056 if (err)
1da177e4
LT		 2057 goto out_nfserr;
2058 }
2059 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2060 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2061 status = nfserr_jukebox;
2062 if (!tempfh)
2063 goto out;
2064 fh_init(tempfh, NFS4_FHSIZE);
2065 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2066 if (status)
2067 goto out;
d50e6136 2068 fhp = tempfh;
1da177e4
LT		 2069 }
2070 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2071 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2072 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2073 aclsupport = (err == 0);
1da177e4 2074 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2075 if (err == -EOPNOTSUPP)
1da177e4 2076 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2077 else if (err == -EINVAL) {
1da177e4
LT		 2078 status = nfserr_attrnotsupp;
2079 goto out;
b8dd7b9a 2080 } else if (err != 0)
1da177e4
LT		 2081 goto out_nfserr;
2082 }
2083 }
1da177e4 2084
18032ca0
DQ		 2085#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2086 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2087 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2088 err = security_inode_getsecctx(dentry->d_inode,
2089 &context, &contextlen);
2090 contextsupport = (err == 0);
2091 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2092 if (err == -EOPNOTSUPP)
2093 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2094 else if (err)
2095 goto out_nfserr;
2096 }
2097 }
2098#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2099
2b44f1ba 2100 if (bmval2) {
ddd1ea56
BF		 2101 p = xdr_reserve_space(xdr, 16);
2102 if (!p)
2b44f1ba 2103 goto out_resource;
c373b0a4
BF		 2104 *p++ = cpu_to_be32(3);
2105 *p++ = cpu_to_be32(bmval0);
2106 *p++ = cpu_to_be32(bmval1);
2107 *p++ = cpu_to_be32(bmval2);
2b44f1ba 2108 } else if (bmval1) {
ddd1ea56
BF		 2109 p = xdr_reserve_space(xdr, 12);
2110 if (!p)
2b44f1ba 2111 goto out_resource;
c373b0a4
BF		 2112 *p++ = cpu_to_be32(2);
2113 *p++ = cpu_to_be32(bmval0);
2114 *p++ = cpu_to_be32(bmval1);
7e705706 2115 } else {
ddd1ea56
BF		 2116 p = xdr_reserve_space(xdr, 8);
2117 if (!p)
2b44f1ba 2118 goto out_resource;
c373b0a4
BF		 2119 *p++ = cpu_to_be32(1);
2120 *p++ = cpu_to_be32(bmval0);
7e705706 2121 }
082d4bd7
BF		 2122
2123 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2124 p = xdr_reserve_space(xdr, 4);
2125 if (!p)
2126 goto out_resource;
082d4bd7 2127 p++; /* to be backfilled later */
1da177e4
LT		 2128
2129 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2130 u32 word0 = nfsd_suppattrs0(minorversion);
2131 u32 word1 = nfsd_suppattrs1(minorversion);
2132 u32 word2 = nfsd_suppattrs2(minorversion);
2133
42ca0993
BF		 2134 if (!aclsupport)
2135 word0 &= ~FATTR4_WORD0_ACL;
18032ca0
DQ		 2136 if (!contextsupport)
2137 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
7e705706 2138 if (!word2) {
ddd1ea56
BF		 2139 p = xdr_reserve_space(xdr, 12);
2140 if (!p)
2b44f1ba 2141 goto out_resource;
c373b0a4
BF		 2142 *p++ = cpu_to_be32(2);
2143 *p++ = cpu_to_be32(word0);
2144 *p++ = cpu_to_be32(word1);
7e705706 2145 } else {
ddd1ea56
BF		 2146 p = xdr_reserve_space(xdr, 16);
2147 if (!p)
2b44f1ba 2148 goto out_resource;
c373b0a4
BF		 2149 *p++ = cpu_to_be32(3);
2150 *p++ = cpu_to_be32(word0);
2151 *p++ = cpu_to_be32(word1);
2152 *p++ = cpu_to_be32(word2);
7e705706 2153 }
1da177e4
LT		 2154 }
2155 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2156 p = xdr_reserve_space(xdr, 4);
2157 if (!p)
1da177e4 2158 goto out_resource;
3d2544b1 2159 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2160 if (dummy == NF4BAD) {
2161 status = nfserr_serverfault;
2162 goto out;
2163 }
c373b0a4 2164 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2165 }
2166 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2167 p = xdr_reserve_space(xdr, 4);
2168 if (!p)
1da177e4 2169 goto out_resource;
49640001 2170 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2171 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2172 else
c373b0a4
BF		 2173 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2174 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2175 }
2176 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2177 p = xdr_reserve_space(xdr, 8);
2178 if (!p)
1da177e4 2179 goto out_resource;
d05d5744 2180 p = encode_change(p, &stat, dentry->d_inode);
1da177e4
LT		 2181 }
2182 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2183 p = xdr_reserve_space(xdr, 8);
2184 if (!p)
1da177e4 2185 goto out_resource;
b64c7f3b 2186 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2187 }
2188 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2189 p = xdr_reserve_space(xdr, 4);
2190 if (!p)
1da177e4 2191 goto out_resource;
c373b0a4 2192 *p++ = cpu_to_be32(1);
1da177e4
LT		 2193 }
2194 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2195 p = xdr_reserve_space(xdr, 4);
2196 if (!p)
1da177e4 2197 goto out_resource;
c373b0a4 2198 *p++ = cpu_to_be32(1);
1da177e4
LT		 2199 }
2200 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2201 p = xdr_reserve_space(xdr, 4);
2202 if (!p)
1da177e4 2203 goto out_resource;
c373b0a4 2204 *p++ = cpu_to_be32(0);
1da177e4
LT		 2205 }
2206 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2207 p = xdr_reserve_space(xdr, 16);
2208 if (!p)
1da177e4 2209 goto out_resource;
42ca0993 2210 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 2211 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2212 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2213 } else switch(fsid_source(fhp)) {
2214 case FSIDSOURCE_FSID:
b64c7f3b
BF		 2215 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2216 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 2217 break;
2218 case FSIDSOURCE_DEV:
c373b0a4
BF		 2219 *p++ = cpu_to_be32(0);
2220 *p++ = cpu_to_be32(MAJOR(stat.dev));
2221 *p++ = cpu_to_be32(0);
2222 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 2223 break;
2224 case FSIDSOURCE_UUID:
0c0c267b 2225 p = xdr_encode_opaque_fixed(p, exp->ex_uuid, 16);
af6a4e28 2226 break;
1da177e4
LT		 2227 }
2228 }
2229 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2230 p = xdr_reserve_space(xdr, 4);
2231 if (!p)
1da177e4 2232 goto out_resource;
c373b0a4 2233 *p++ = cpu_to_be32(0);
1da177e4
LT		 2234 }
2235 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2236 p = xdr_reserve_space(xdr, 4);
2237 if (!p)
1da177e4 2238 goto out_resource;
c373b0a4 2239 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 2240 }
2241 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2242 p = xdr_reserve_space(xdr, 4);
2243 if (!p)
1da177e4 2244 goto out_resource;
c373b0a4 2245 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 2246 }
2247 if (bmval0 & FATTR4_WORD0_ACL) {
2248 struct nfs4_ace *ace;
1da177e4
LT		 2249
2250 if (acl == NULL) {
ddd1ea56
BF		 2251 p = xdr_reserve_space(xdr, 4);
2252 if (!p)
1da177e4
LT		 2253 goto out_resource;
2254
c373b0a4 2255 *p++ = cpu_to_be32(0);
1da177e4
LT		 2256 goto out_acl;
2257 }
ddd1ea56
BF		 2258 p = xdr_reserve_space(xdr, 4);
2259 if (!p)
1da177e4 2260 goto out_resource;
c373b0a4 2261 *p++ = cpu_to_be32(acl->naces);
1da177e4 2262
28e05dd8 2263 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2264 p = xdr_reserve_space(xdr, 4*3);
2265 if (!p)
1da177e4 2266 goto out_resource;
c373b0a4
BF		 2267 *p++ = cpu_to_be32(ace->type);
2268 *p++ = cpu_to_be32(ace->flag);
2269 *p++ = cpu_to_be32(ace->access_mask &
2270 NFS4_ACE_MASK_ALL);
ddd1ea56 2271 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2272 if (status)
2273 goto out;
2274 }
2275 }
2276out_acl:
2277 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2278 p = xdr_reserve_space(xdr, 4);
2279 if (!p)
1da177e4 2280 goto out_resource;
c373b0a4 2281 *p++ = cpu_to_be32(aclsupport ?
1da177e4
LT		 2282 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2283 }
2284 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2285 p = xdr_reserve_space(xdr, 4);
2286 if (!p)
1da177e4 2287 goto out_resource;
c373b0a4 2288 *p++ = cpu_to_be32(1);
1da177e4
LT		 2289 }
2290 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2291 p = xdr_reserve_space(xdr, 4);
2292 if (!p)
1da177e4 2293 goto out_resource;
c373b0a4 2294 *p++ = cpu_to_be32(0);
1da177e4
LT		 2295 }
2296 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2297 p = xdr_reserve_space(xdr, 4);
2298 if (!p)
1da177e4 2299 goto out_resource;
c373b0a4 2300 *p++ = cpu_to_be32(1);
1da177e4
LT		 2301 }
2302 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2303 p = xdr_reserve_space(xdr, 4);
2304 if (!p)
1da177e4 2305 goto out_resource;
c373b0a4 2306 *p++ = cpu_to_be32(1);
1da177e4
LT		 2307 }
2308 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2309 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2310 if (!p)
1da177e4 2311 goto out_resource;
0c0c267b
BF		 2312 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2313 fhp->fh_handle.fh_size);
1da177e4
LT		 2314 }
2315 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2316 p = xdr_reserve_space(xdr, 8);
2317 if (!p)
1da177e4 2318 goto out_resource;
b64c7f3b 2319 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 2320 }
2321 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2322 p = xdr_reserve_space(xdr, 8);
2323 if (!p)
1da177e4 2324 goto out_resource;
b64c7f3b 2325 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2326 }
2327 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2328 p = xdr_reserve_space(xdr, 8);
2329 if (!p)
1da177e4 2330 goto out_resource;
b64c7f3b 2331 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2332 }
2333 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2334 p = xdr_reserve_space(xdr, 8);
2335 if (!p)
1da177e4 2336 goto out_resource;
b64c7f3b 2337 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 2338 }
81c3f413 2339 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2340 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2341 if (status)
2342 goto out;
2343 }
1da177e4 2344 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2345 p = xdr_reserve_space(xdr, 4);
2346 if (!p)
1da177e4 2347 goto out_resource;
c373b0a4 2348 *p++ = cpu_to_be32(1);
1da177e4
LT		 2349 }
2350 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2351 p = xdr_reserve_space(xdr, 8);
2352 if (!p)
1da177e4 2353 goto out_resource;
b64c7f3b 2354 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2355 }
2356 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2357 p = xdr_reserve_space(xdr, 4);
2358 if (!p)
1da177e4 2359 goto out_resource;
c373b0a4 2360 *p++ = cpu_to_be32(255);
1da177e4
LT		 2361 }
2362 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2363 p = xdr_reserve_space(xdr, 4);
2364 if (!p)
1da177e4 2365 goto out_resource;
c373b0a4 2366 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 2367 }
2368 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2369 p = xdr_reserve_space(xdr, 8);
2370 if (!p)
1da177e4 2371 goto out_resource;
b64c7f3b 2372 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2373 }
2374 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2375 p = xdr_reserve_space(xdr, 8);
2376 if (!p)
1da177e4 2377 goto out_resource;
b64c7f3b 2378 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2379 }
2380 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2381 p = xdr_reserve_space(xdr, 4);
2382 if (!p)
1da177e4 2383 goto out_resource;
c373b0a4 2384 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 2385 }
2386 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2387 p = xdr_reserve_space(xdr, 4);
2388 if (!p)
1da177e4 2389 goto out_resource;
c373b0a4 2390 *p++ = cpu_to_be32(1);
1da177e4
LT		 2391 }
2392 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2393 p = xdr_reserve_space(xdr, 4);
2394 if (!p)
1da177e4 2395 goto out_resource;
c373b0a4 2396 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 2397 }
2398 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2399 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2400 if (status)
2401 goto out;
2402 }
2403 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2404 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2405 if (status)
2406 goto out;
2407 }
2408 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2409 p = xdr_reserve_space(xdr, 8);
2410 if (!p)
1da177e4 2411 goto out_resource;
c373b0a4
BF		 2412 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2413 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 2414 }
2415 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2416 p = xdr_reserve_space(xdr, 8);
2417 if (!p)
1da177e4
LT		 2418 goto out_resource;
2419 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 2420 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2421 }
2422 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2423 p = xdr_reserve_space(xdr, 8);
2424 if (!p)
1da177e4
LT		 2425 goto out_resource;
2426 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 2427 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2428 }
2429 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2430 p = xdr_reserve_space(xdr, 8);
2431 if (!p)
1da177e4
LT		 2432 goto out_resource;
2433 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 2434 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2435 }
2436 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2437 p = xdr_reserve_space(xdr, 8);
2438 if (!p)
1da177e4
LT		 2439 goto out_resource;
2440 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 2441 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2442 }
2443 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2444 p = xdr_reserve_space(xdr, 12);
2445 if (!p)
1da177e4 2446 goto out_resource;
b64c7f3b 2447 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 2448 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 2449 }
2450 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2451 p = xdr_reserve_space(xdr, 12);
2452 if (!p)
1da177e4 2453 goto out_resource;
c373b0a4
BF		 2454 *p++ = cpu_to_be32(0);
2455 *p++ = cpu_to_be32(1);
2456 *p++ = cpu_to_be32(0);
1da177e4
LT		 2457 }
2458 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2459 p = xdr_reserve_space(xdr, 12);
2460 if (!p)
1da177e4 2461 goto out_resource;
b64c7f3b 2462 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 2463 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 2464 }
2465 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2466 p = xdr_reserve_space(xdr, 12);
2467 if (!p)
1da177e4 2468 goto out_resource;
b64c7f3b 2469 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 2470 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 2471 }
2472 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
ddd1ea56
BF		 2473 p = xdr_reserve_space(xdr, 8);
2474 if (!p)
1da177e4 2475 goto out_resource;
406a7ea9
FF		 2476 /*
2477 * Get parent's attributes if not ignoring crossmount
2478 * and this is the root of a cross-mounted filesystem.
2479 */
2480 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2481 dentry == exp->ex_path.mnt->mnt_root)
2482 get_parent_attributes(exp, &stat);
b64c7f3b 2483 p = xdr_encode_hyper(p, stat.ino);
1da177e4 2484 }
18032ca0 2485 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
ddd1ea56
BF		 2486 status = nfsd4_encode_security_label(xdr, rqstp, context,
2487 contextlen);
18032ca0
DQ		 2488 if (status)
2489 goto out;
2490 }
8c18f205 2491 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
ddd1ea56
BF		 2492 p = xdr_reserve_space(xdr, 16);
2493 if (!p)
de3997a7 2494 goto out_resource;
c373b0a4
BF		 2495 *p++ = cpu_to_be32(3);
2496 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2497 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2498 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
8c18f205 2499 }
7e705706 2500
082d4bd7
BF		 2501 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2502 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2503 status = nfs_ok;
2504
2505out:
ba4e55bb 2506#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2507 if (context)
2508 security_release_secctx(context, contextlen);
ba4e55bb 2509#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2510 kfree(acl);
18df11d0 2511 if (tempfh) {
d50e6136 2512 fh_put(tempfh);
18df11d0
YZ		 2513 kfree(tempfh);
2514 }
1fcea5b2
BF		 2515 if (status)
2516 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2517 return status;
2518out_nfserr:
b8dd7b9a 2519 status = nfserrno(err);
1da177e4
LT		 2520 goto out;
2521out_resource:
1da177e4
LT		 2522 status = nfserr_resource;
2523 goto out;
1da177e4
LT		 2524}
2525
2825a7f9
BF		 2526static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2527 struct xdr_buf *buf, __be32 *p, int bytes)
2528{
2529 xdr->scratch.iov_len = 0;
2530 memset(buf, 0, sizeof(struct xdr_buf));
2531 buf->head[0].iov_base = p;
2532 buf->head[0].iov_len = 0;
2533 buf->len = 0;
2534 xdr->buf = buf;
2535 xdr->iov = buf->head;
2536 xdr->p = p;
2537 xdr->end = (void *)p + bytes;
2538 buf->buflen = bytes;
2539}
2540
d5184658
BF		 2541__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2542 struct svc_fh *fhp, struct svc_export *exp,
2543 struct dentry *dentry, u32 *bmval,
2544 struct svc_rqst *rqstp, int ignore_crossmnt)
2545{
2825a7f9 2546 struct xdr_buf dummy;
d5184658
BF		 2547 struct xdr_stream xdr;
2548 __be32 ret;
2549
2825a7f9 2550 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2551 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2552 ignore_crossmnt);
2553 *p = xdr.p;
2554 return ret;
2555}
2556
c0ce6ec8
BF		 2557static inline int attributes_need_mount(u32 *bmval)
2558{
2559 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2560 return 1;
2561 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2562 return 1;
2563 return 0;
2564}
2565
b37ad28b 2566static __be32
561f0ed4
BF		 2567nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2568 const char *name, int namlen)
1da177e4
LT		 2569{
2570 struct svc_export *exp = cd->rd_fhp->fh_export;
2571 struct dentry *dentry;
b37ad28b 2572 __be32 nfserr;
406a7ea9 2573 int ignore_crossmnt = 0;
1da177e4
LT		 2574
2575 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2576 if (IS_ERR(dentry))
2577 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2578 if (!dentry->d_inode) {
2579 /*
2580 * nfsd_buffered_readdir drops the i_mutex between
2581 * readdir and calling this callback, leaving a window
2582 * where this directory entry could have gone away.
2583 */
2584 dput(dentry);
2585 return nfserr_noent;
2586 }
1da177e4
LT		 2587
2588 exp_get(exp);
406a7ea9
FF		 2589 /*
2590 * In the case of a mountpoint, the client may be asking for
2591 * attributes that are only properties of the underlying filesystem
2592 * as opposed to the cross-mounted file system. In such a case,
2593 * we will not follow the cross mount and will fill the attribtutes
2594 * directly from the mountpoint dentry.
2595 */
3227fa41 2596 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2597 int err;
2598
3227fa41
BF		 2599 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2600 && !attributes_need_mount(cd->rd_bmval)) {
2601 ignore_crossmnt = 1;
2602 goto out_encode;
2603 }
dcb488a3
AA		 2604 /*
2605 * Why the heck aren't we just using nfsd_lookup??
2606 * Different "."/".." handling? Something else?
2607 * At least, add a comment here to explain....
2608 */
021d3a72
BF		 2609 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2610 if (err) {
2611 nfserr = nfserrno(err);
1da177e4
LT		 2612 goto out_put;
2613 }
dcb488a3
AA		 2614 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2615 if (nfserr)
2616 goto out_put;
1da177e4
LT		 2617
2618 }
3227fa41 2619out_encode:
561f0ed4 2620 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 2621 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2622out_put:
2623 dput(dentry);
2624 exp_put(exp);
2625 return nfserr;
2626}
2627
2ebbc012 2628static __be32 *
561f0ed4 2629nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 2630{
561f0ed4
BF		 2631 __be32 *p;
2632
2633 p = xdr_reserve_space(xdr, 6);
2634 if (!p)
1da177e4
LT		 2635 return NULL;
2636 *p++ = htonl(2);
2637 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2638 *p++ = htonl(0); /* bmval1 */
2639
87915c64 2640 *p++ = htonl(4); /* attribute length */
1da177e4 2641 *p++ = nfserr; /* no htonl */
1da177e4
LT		 2642 return p;
2643}
2644
2645static int
a0ad13ef
N		 2646nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2647 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2648{
a0ad13ef 2649 struct readdir_cd *ccd = ccdv;
1da177e4 2650 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 2651 struct xdr_stream *xdr = cd->xdr;
2652 int start_offset = xdr->buf->len;
2653 int cookie_offset;
2654 int entry_bytes;
b37ad28b 2655 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 2656 __be64 wire_offset;
2657 __be32 *p;
1da177e4
LT		 2658
2659 /* In nfsv4, "." and ".." never make it onto the wire.. */
2660 if (name && isdotent(name, namlen)) {
2661 cd->common.err = nfs_ok;
2662 return 0;
2663 }
2664
561f0ed4
BF		 2665 if (cd->cookie_offset) {
2666 wire_offset = cpu_to_be64(offset);
2667 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2668 &wire_offset, 8);
2669 }
1da177e4 2670
561f0ed4
BF		 2671 p = xdr_reserve_space(xdr, 4);
2672 if (!p)
1da177e4 2673 goto fail;
1da177e4 2674 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 2675 cookie_offset = xdr->buf->len;
2676 p = xdr_reserve_space(xdr, 3*4 + namlen);
2677 if (!p)
2678 goto fail;
1da177e4
LT		 2679 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2680 p = xdr_encode_array(p, name, namlen); /* name length & name */
2681
561f0ed4 2682 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 2683 switch (nfserr) {
2684 case nfs_ok:
1da177e4
LT		 2685 break;
2686 case nfserr_resource:
2687 nfserr = nfserr_toosmall;
2688 goto fail;
b2c0cea6
BF		 2689 case nfserr_noent:
2690 goto skip_entry;
1da177e4
LT		 2691 default:
2692 /*
2693 * If the client requested the RDATTR_ERROR attribute,
2694 * we stuff the error code into this attribute
2695 * and continue. If this attribute was not requested,
2696 * then in accordance with the spec, we fail the
2697 * entire READDIR operation(!)
2698 */
2699 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2700 goto fail;
561f0ed4 2701 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 2702 if (p == NULL) {
2703 nfserr = nfserr_toosmall;
1da177e4 2704 goto fail;
34081efc 2705 }
1da177e4 2706 }
561f0ed4
BF		 2707 nfserr = nfserr_toosmall;
2708 entry_bytes = xdr->buf->len - start_offset;
2709 if (entry_bytes > cd->rd_maxcount)
2710 goto fail;
2711 cd->rd_maxcount -= entry_bytes;
3b299709
BF		 2712 if (!cd->rd_dircount)
2713 goto fail;
2714 cd->rd_dircount--;
561f0ed4 2715 cd->cookie_offset = cookie_offset;
b2c0cea6 2716skip_entry:
1da177e4
LT		 2717 cd->common.err = nfs_ok;
2718 return 0;
2719fail:
561f0ed4 2720 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 2721 cd->common.err = nfserr;
2722 return -EINVAL;
2723}
2724
d0a381dd
BF		 2725static __be32
2726nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 2727{
bc749ca4 2728 __be32 *p;
e2f282b9 2729
d0a381dd
BF		 2730 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2731 if (!p)
2732 return nfserr_resource;
c373b0a4 2733 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 2734 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
2735 sizeof(stateid_opaque_t));
d0a381dd 2736 return 0;
e2f282b9
BH		 2737}
2738
695e12f8 2739static __be32
b37ad28b 2740nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2741{
d0a381dd 2742 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2743 __be32 *p;
1da177e4
LT		 2744
2745 if (!nfserr) {
d0a381dd
BF		 2746 p = xdr_reserve_space(xdr, 8);
2747 if (!p)
2748 return nfserr_resource;
c373b0a4
BF		 2749 *p++ = cpu_to_be32(access->ac_supported);
2750 *p++ = cpu_to_be32(access->ac_resp_access);
1da177e4 2751 }
695e12f8 2752 return nfserr;
1da177e4
LT		 2753}
2754
1d1bc8f2
BF		 2755static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2756{
d0a381dd 2757 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 2758 __be32 *p;
2759
2760 if (!nfserr) {
d0a381dd
BF		 2761 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2762 if (!p)
2763 return nfserr_resource;
0c0c267b
BF		 2764 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
2765 NFS4_MAX_SESSIONID_LEN);
c373b0a4 2766 *p++ = cpu_to_be32(bcts->dir);
6e67b5d1 2767 /* Sorry, we do not yet support RDMA over 4.1: */
c373b0a4 2768 *p++ = cpu_to_be32(0);
1d1bc8f2
BF		 2769 }
2770 return nfserr;
2771}
2772
695e12f8 2773static __be32
b37ad28b 2774nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 2775{
d0a381dd
BF		 2776 struct xdr_stream *xdr = &resp->xdr;
2777
e2f282b9 2778 if (!nfserr)
d0a381dd 2779 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
e2f282b9 2780
695e12f8 2781 return nfserr;
1da177e4
LT		 2782}
2783
2784
695e12f8 2785static __be32
b37ad28b 2786nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2787{
d0a381dd 2788 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2789 __be32 *p;
1da177e4
LT		 2790
2791 if (!nfserr) {
d0a381dd
BF		 2792 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
2793 if (!p)
2794 return nfserr_resource;
0c0c267b
BF		 2795 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
2796 NFS4_VERIFIER_SIZE);
1da177e4 2797 }
695e12f8 2798 return nfserr;
1da177e4
LT		 2799}
2800
695e12f8 2801static __be32
b37ad28b 2802nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2803{
d0a381dd 2804 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2805 __be32 *p;
1da177e4
LT		 2806
2807 if (!nfserr) {
d0a381dd
BF		 2808 p = xdr_reserve_space(xdr, 32);
2809 if (!p)
2810 return nfserr_resource;
d05d5744 2811 p = encode_cinfo(p, &create->cr_cinfo);
c373b0a4
BF		 2812 *p++ = cpu_to_be32(2);
2813 *p++ = cpu_to_be32(create->cr_bmval[0]);
2814 *p++ = cpu_to_be32(create->cr_bmval[1]);
1da177e4 2815 }
695e12f8 2816 return nfserr;
1da177e4
LT		 2817}
2818
b37ad28b
AV		 2819static __be32
2820nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2821{
2822 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 2823 struct xdr_stream *xdr = &resp->xdr;
1da177e4
LT		 2824
2825 if (nfserr)
2826 return nfserr;
2827
d5184658
BF		 2828 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2829 getattr->ga_bmval,
406a7ea9 2830 resp->rqstp, 0);
1da177e4
LT		 2831 return nfserr;
2832}
2833
695e12f8
BH		 2834static __be32
2835nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2836{
d0a381dd 2837 struct xdr_stream *xdr = &resp->xdr;
695e12f8 2838 struct svc_fh *fhp = *fhpp;
1da177e4 2839 unsigned int len;
bc749ca4 2840 __be32 *p;
1da177e4
LT		 2841
2842 if (!nfserr) {
2843 len = fhp->fh_handle.fh_size;
d0a381dd
BF		 2844 p = xdr_reserve_space(xdr, len + 4);
2845 if (!p)
2846 return nfserr_resource;
0c0c267b 2847 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
1da177e4 2848 }
695e12f8 2849 return nfserr;
1da177e4
LT		 2850}
2851
2852/*
2853* Including all fields other than the name, a LOCK4denied structure requires
2854* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2855*/
d0a381dd
BF		 2856static __be32
2857nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 2858{
7c13f344 2859 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2860 __be32 *p;
1da177e4 2861
8c7424cf 2862again:
d0a381dd 2863 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 2864 if (!p) {
2865 /*
2866 * Don't fail to return the result just because we can't
2867 * return the conflicting open:
2868 */
2869 if (conf->len) {
2870 conf->len = 0;
2871 conf->data = NULL;
2872 goto again;
2873 }
d0a381dd 2874 return nfserr_resource;
8c7424cf 2875 }
b64c7f3b
BF		 2876 p = xdr_encode_hyper(p, ld->ld_start);
2877 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 2878 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 2879 if (conf->len) {
0c0c267b
BF		 2880 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
2881 p = xdr_encode_opaque(p, conf->data, conf->len);
1da177e4 2882 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 2883 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 2884 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 2885 }
d0a381dd 2886 return nfserr_denied;
1da177e4
LT		 2887}
2888
695e12f8 2889static __be32
b37ad28b 2890nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2891{
d0a381dd
BF		 2892 struct xdr_stream *xdr = &resp->xdr;
2893
e2f282b9 2894 if (!nfserr)
d0a381dd 2895 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 2896 else if (nfserr == nfserr_denied)
d0a381dd 2897 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
8c7424cf 2898 kfree(lock->lk_denied.ld_owner.data);
695e12f8 2899 return nfserr;
1da177e4
LT		 2900}
2901
695e12f8 2902static __be32
b37ad28b 2903nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 2904{
d0a381dd
BF		 2905 struct xdr_stream *xdr = &resp->xdr;
2906
1da177e4 2907 if (nfserr == nfserr_denied)
d0a381dd 2908 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 2909 return nfserr;
1da177e4
LT		 2910}
2911
695e12f8 2912static __be32
b37ad28b 2913nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 2914{
d0a381dd
BF		 2915 struct xdr_stream *xdr = &resp->xdr;
2916
e2f282b9 2917 if (!nfserr)
d0a381dd 2918 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
e2f282b9 2919
695e12f8 2920 return nfserr;
1da177e4
LT		 2921}
2922
2923
695e12f8 2924static __be32
b37ad28b 2925nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2926{
d0a381dd 2927 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2928 __be32 *p;
1da177e4
LT		 2929
2930 if (!nfserr) {
d0a381dd
BF		 2931 p = xdr_reserve_space(xdr, 20);
2932 if (!p)
2933 return nfserr_resource;
d05d5744 2934 p = encode_cinfo(p, &link->li_cinfo);
1da177e4 2935 }
695e12f8 2936 return nfserr;
1da177e4
LT		 2937}
2938
2939
695e12f8 2940static __be32
b37ad28b 2941nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2942{
d0a381dd 2943 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2944 __be32 *p;
1da177e4
LT		 2945
2946 if (nfserr)
2947 goto out;
2948
d0a381dd
BF		 2949 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
2950 if (nfserr)
2951 goto out;
2952 p = xdr_reserve_space(xdr, 40);
2953 if (!p)
2954 return nfserr_resource;
d05d5744 2955 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4
BF		 2956 *p++ = cpu_to_be32(open->op_rflags);
2957 *p++ = cpu_to_be32(2);
2958 *p++ = cpu_to_be32(open->op_bmval[0]);
2959 *p++ = cpu_to_be32(open->op_bmval[1]);
2960 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 2961
2962 switch (open->op_delegate_type) {
2963 case NFS4_OPEN_DELEGATE_NONE:
2964 break;
2965 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 2966 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2967 if (nfserr)
2968 return nfserr;
2969 p = xdr_reserve_space(xdr, 20);
2970 if (!p)
2971 return nfserr_resource;
c373b0a4 2972 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 2973
2974 /*
2975 * TODO: ACE's in delegations
2976 */
c373b0a4
BF		 2977 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2978 *p++ = cpu_to_be32(0);
2979 *p++ = cpu_to_be32(0);
2980 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 2981 break;
2982 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 2983 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2984 if (nfserr)
2985 return nfserr;
2986 p = xdr_reserve_space(xdr, 32);
2987 if (!p)
2988 return nfserr_resource;
c373b0a4 2989 *p++ = cpu_to_be32(0);
1da177e4
LT		 2990
2991 /*
2992 * TODO: space_limit's in delegations
2993 */
c373b0a4
BF		 2994 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
2995 *p++ = cpu_to_be32(~(u32)0);
2996 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 2997
2998 /*
2999 * TODO: ACE's in delegations
3000 */
c373b0a4
BF		 3001 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3002 *p++ = cpu_to_be32(0);
3003 *p++ = cpu_to_be32(0);
3004 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3005 break;
d24433cd
BH		 3006 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3007 switch (open->op_why_no_deleg) {
3008 case WND4_CONTENTION:
3009 case WND4_RESOURCE:
d0a381dd
BF		 3010 p = xdr_reserve_space(xdr, 8);
3011 if (!p)
3012 return nfserr_resource;
c373b0a4
BF		 3013 *p++ = cpu_to_be32(open->op_why_no_deleg);
3014 /* deleg signaling not supported yet: */
3015 *p++ = cpu_to_be32(0);
d24433cd
BH		 3016 break;
3017 default:
d0a381dd
BF		 3018 p = xdr_reserve_space(xdr, 4);
3019 if (!p)
3020 return nfserr_resource;
c373b0a4 3021 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3022 }
d24433cd 3023 break;
1da177e4
LT		 3024 default:
3025 BUG();
3026 }
3027 /* XXX save filehandle here */
3028out:
695e12f8 3029 return nfserr;
1da177e4
LT		 3030}
3031
695e12f8 3032static __be32
b37ad28b 3033nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3034{
d0a381dd
BF		 3035 struct xdr_stream *xdr = &resp->xdr;
3036
e2f282b9 3037 if (!nfserr)
d0a381dd 3038 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4 3039
695e12f8 3040 return nfserr;
1da177e4
LT		 3041}
3042
695e12f8 3043static __be32
b37ad28b 3044nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3045{
d0a381dd
BF		 3046 struct xdr_stream *xdr = &resp->xdr;
3047
e2f282b9 3048 if (!nfserr)
d0a381dd 3049 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4 3050
695e12f8 3051 return nfserr;
1da177e4
LT		 3052}
3053
dc97618d
BF		 3054static __be32 nfsd4_encode_splice_read(
3055 struct nfsd4_compoundres *resp,
3056 struct nfsd4_read *read,
3057 struct file *file, unsigned long maxcount)
1da177e4 3058{
ddd1ea56 3059 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3060 struct xdr_buf *buf = xdr->buf;
dc97618d 3061 u32 eof;
30596768 3062 int space_left;
dc97618d 3063 __be32 nfserr;
fec25fa4 3064 __be32 *p = xdr->p - 2;
1da177e4 3065
dc97618d
BF		 3066 /*
3067 * Don't inline pages unless we know there's room for eof,
3068 * count, and possible padding:
3069 */
3070 if (xdr->end - xdr->p < 3)
d0a381dd 3071 return nfserr_resource;
dc97618d
BF		 3072
3073 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3074 read->rd_offset, &maxcount);
3075 if (nfserr) {
3076 /*
3077 * nfsd_splice_actor may have already messed with the
3078 * page length; reset it so as not to confuse
3079 * xdr_truncate_encode:
3080 */
34a78b48 3081 buf->page_len = 0;
dc97618d 3082 return nfserr;
b0e35fda 3083 }
1da177e4 3084
dc97618d
BF		 3085 eof = (read->rd_offset + maxcount >=
3086 read->rd_fhp->fh_dentry->d_inode->i_size);
4e21ac4b 3087
fec25fa4
BF		 3088 *(p++) = htonl(eof);
3089 *(p++) = htonl(maxcount);
dc97618d 3090
34a78b48
BF		 3091 buf->page_len = maxcount;
3092 buf->len += maxcount;
dc97618d 3093 xdr->page_ptr += (maxcount + PAGE_SIZE - 1) / PAGE_SIZE;
dc97618d
BF		 3094
3095 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3096 buf->tail[0].iov_base = xdr->p;
3097 buf->tail[0].iov_len = 0;
fec25fa4 3098 xdr->iov = buf->tail;
dc97618d 3099 if (maxcount&3) {
fec25fa4
BF		 3100 int pad = 4 - (maxcount&3);
3101
3102 *(xdr->p++) = 0;
3103
34a78b48 3104 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3105 buf->tail[0].iov_len = pad;
3106 buf->len += pad;
b0e35fda 3107 }
2825a7f9 3108
dc97618d 3109 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3110 buf->buflen - buf->len);
3111 buf->buflen = buf->len + space_left;
dc97618d
BF		 3112 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3113
3114 return 0;
3115}
3116
3117static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3118 struct nfsd4_read *read,
3119 struct file *file, unsigned long maxcount)
3120{
3121 struct xdr_stream *xdr = &resp->xdr;
3122 u32 eof;
3123 int v;
dc97618d 3124 int starting_len = xdr->buf->len - 8;
dc97618d 3125 long len;
b0420980 3126 int thislen;
dc97618d
BF		 3127 __be32 nfserr;
3128 __be32 tmp;
3129 __be32 *p;
b0420980
BF		 3130 u32 zzz = 0;
3131 int pad;
1da177e4
LT		 3132
3133 len = maxcount;
3134 v = 0;
6ff9897d 3135
b0420980
BF		 3136 thislen = (void *)xdr->end - (void *)xdr->p;
3137 if (len < thislen)
3138 thislen = len;
3139 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3140 WARN_ON_ONCE(!p);
3141 resp->rqstp->rq_vec[v].iov_base = p;
3142 resp->rqstp->rq_vec[v].iov_len = thislen;
3143 v++;
3144 len -= thislen;
3145
3146 while (len) {
6ff9897d 3147 thislen = min_t(long, len, PAGE_SIZE);
b0420980
BF		 3148 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3149 WARN_ON_ONCE(!p);
3150 resp->rqstp->rq_vec[v].iov_base = p;
6ff9897d 3151 resp->rqstp->rq_vec[v].iov_len = thislen;
1da177e4 3152 v++;
6ff9897d 3153 len -= thislen;
1da177e4
LT		 3154 }
3155 read->rd_vlen = v;
3156
dc97618d
BF		 3157 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3158 read->rd_vlen, &maxcount);
3159 if (nfserr)
1da177e4 3160 return nfserr;
b0420980 3161 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
dc97618d 3162
44524359
N		 3163 eof = (read->rd_offset + maxcount >=
3164 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4 3165
dc97618d
BF		 3166 tmp = htonl(eof);
3167 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3168 tmp = htonl(maxcount);
3169 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3170
b0420980
BF		 3171 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3172 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3173 &zzz, pad);
1da177e4 3174 return 0;
dc97618d
BF		 3175
3176}
3177
3178static __be32
3179nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3180 struct nfsd4_read *read)
3181{
3182 unsigned long maxcount;
3183 struct xdr_stream *xdr = &resp->xdr;
3184 struct file *file = read->rd_filp;
3185 int starting_len = xdr->buf->len;
3186 struct raparms *ra;
3187 __be32 *p;
3188 __be32 err;
3189
3190 if (nfserr)
3191 return nfserr;
3192
3193 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3194 if (!p) {
3195 WARN_ON_ONCE(resp->rqstp->rq_splice_ok);
3196 return nfserr_resource;
3197 }
b0420980
BF		 3198 if (resp->xdr.buf->page_len && resp->rqstp->rq_splice_ok) {
3199 WARN_ON_ONCE(1);
dc97618d
BF		 3200 return nfserr_resource;
3201 }
dc97618d
BF		 3202 xdr_commit_encode(xdr);
3203
3204 maxcount = svc_max_payload(resp->rqstp);
b0420980
BF		 3205 if (maxcount > xdr->buf->buflen - xdr->buf->len)
3206 maxcount = xdr->buf->buflen - xdr->buf->len;
dc97618d
BF		 3207 if (maxcount > read->rd_length)
3208 maxcount = read->rd_length;
3209
3210 if (!read->rd_filp) {
3211 err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
3212 &file, &ra);
3213 if (err)
3214 goto err_truncate;
3215 }
3216
3217 if (file->f_op->splice_read && resp->rqstp->rq_splice_ok)
3218 err = nfsd4_encode_splice_read(resp, read, file, maxcount);
3219 else
3220 err = nfsd4_encode_readv(resp, read, file, maxcount);
3221
3222 if (!read->rd_filp)
3223 nfsd_put_tmp_read_open(file, ra);
3224
3225err_truncate:
3226 if (err)
3227 xdr_truncate_encode(xdr, starting_len);
3228 return err;
1da177e4
LT		 3229}
3230
b37ad28b
AV		 3231static __be32
3232nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3233{
3234 int maxcount;
476a7b1f
BF		 3235 __be32 wire_count;
3236 int zero = 0;
ddd1ea56 3237 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3238 int length_offset = xdr->buf->len;
bc749ca4 3239 __be32 *p;
1da177e4
LT		 3240
3241 if (nfserr)
3242 return nfserr;
2825a7f9
BF		 3243
3244 p = xdr_reserve_space(xdr, 4);
3245 if (!p)
3246 return nfserr_resource;
1da177e4 3247 maxcount = PAGE_SIZE;
d0a381dd 3248
476a7b1f
BF		 3249 p = xdr_reserve_space(xdr, maxcount);
3250 if (!p)
4e21ac4b 3251 return nfserr_resource;
1da177e4
LT		 3252 /*
3253 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3254 * if they would overflow the buffer. Is this kosher in NFSv4? If
3255 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3256 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3257 */
476a7b1f
BF		 3258 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3259 (char *)p, &maxcount);
1da177e4 3260 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3261 nfserr = nfserr_inval;
3262 if (nfserr) {
1fcea5b2 3263 xdr_truncate_encode(xdr, length_offset);
1da177e4 3264 return nfserr;
d3f627c8 3265 }
1da177e4 3266
476a7b1f
BF		 3267 wire_count = htonl(maxcount);
3268 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3269 xdr_truncate_encode(xdr, length_offset + 4 + maxcount);
3270 if (maxcount & 3)
3271 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3272 &zero, 4 - (maxcount&3));
1da177e4
LT		 3273 return 0;
3274}
3275
b37ad28b
AV		 3276static __be32
3277nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3278{
3279 int maxcount;
561f0ed4 3280 int bytes_left;
1da177e4 3281 loff_t offset;
561f0ed4 3282 __be64 wire_offset;
ddd1ea56 3283 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3284 int starting_len = xdr->buf->len;
bc749ca4 3285 __be32 *p;
1da177e4
LT		 3286
3287 if (nfserr)
3288 return nfserr;
1da177e4 3289
d0a381dd
BF		 3290 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3291 if (!p)
3292 return nfserr_resource;
1da177e4
LT		 3293
3294 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 3295 *p++ = cpu_to_be32(0);
3296 *p++ = cpu_to_be32(0);
4aea24b2
BF		 3297 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3298 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3299
3300 /*
561f0ed4
BF		 3301 * Number of bytes left for directory entries allowing for the
3302 * final 8 bytes of the readdir and a following failed op:
3303 */
3304 bytes_left = xdr->buf->buflen - xdr->buf->len
3305 - COMPOUND_ERR_SLACK_SPACE - 8;
3306 if (bytes_left < 0) {
3307 nfserr = nfserr_resource;
3308 goto err_no_verf;
3309 }
3310 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3311 /*
3312 * Note the rfc defines rd_maxcount as the size of the
3313 * READDIR4resok structure, which includes the verifier above
3314 * and the 8 bytes encoded at the end of this function:
1da177e4 3315 */
561f0ed4
BF		 3316 if (maxcount < 16) {
3317 nfserr = nfserr_toosmall;
1da177e4
LT		 3318 goto err_no_verf;
3319 }
561f0ed4 3320 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3321
561f0ed4
BF		 3322 readdir->xdr = xdr;
3323 readdir->rd_maxcount = maxcount;
1da177e4 3324 readdir->common.err = 0;
561f0ed4 3325 readdir->cookie_offset = 0;
1da177e4
LT		 3326
3327 offset = readdir->rd_cookie;
3328 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3329 &offset,
3330 &readdir->common, nfsd4_encode_dirent);
3331 if (nfserr == nfs_ok &&
3332 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3333 xdr->buf->len == starting_len + 8) {
3334 /* nothing encoded; which limit did we hit?: */
3335 if (maxcount - 16 < bytes_left)
3336 /* It was the fault of rd_maxcount: */
3337 nfserr = nfserr_toosmall;
3338 else
3339 /* We ran out of buffer space: */
3340 nfserr = nfserr_resource;
3341 }
1da177e4
LT		 3342 if (nfserr)
3343 goto err_no_verf;
3344
561f0ed4
BF		 3345 if (readdir->cookie_offset) {
3346 wire_offset = cpu_to_be64(offset);
3347 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3348 &wire_offset, 8);
3349 }
1da177e4 3350
561f0ed4
BF		 3351 p = xdr_reserve_space(xdr, 8);
3352 if (!p) {
3353 WARN_ON_ONCE(1);
3354 goto err_no_verf;
3355 }
1da177e4
LT		 3356 *p++ = 0; /* no more entries */
3357 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3358
3359 return 0;
3360err_no_verf:
1fcea5b2 3361 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3362 return nfserr;
3363}
3364
695e12f8 3365static __be32
b37ad28b 3366nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3367{
d0a381dd 3368 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3369 __be32 *p;
1da177e4
LT		 3370
3371 if (!nfserr) {
d0a381dd
BF		 3372 p = xdr_reserve_space(xdr, 20);
3373 if (!p)
3374 return nfserr_resource;
d05d5744 3375 p = encode_cinfo(p, &remove->rm_cinfo);
1da177e4 3376 }
695e12f8 3377 return nfserr;
1da177e4
LT		 3378}
3379
695e12f8 3380static __be32
b37ad28b 3381nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3382{
d0a381dd 3383 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3384 __be32 *p;
1da177e4
LT		 3385
3386 if (!nfserr) {
d0a381dd
BF		 3387 p = xdr_reserve_space(xdr, 40);
3388 if (!p)
3389 return nfserr_resource;
d05d5744
BF		 3390 p = encode_cinfo(p, &rename->rn_sinfo);
3391 p = encode_cinfo(p, &rename->rn_tinfo);
1da177e4 3392 }
695e12f8 3393 return nfserr;
1da177e4
LT		 3394}
3395
695e12f8 3396static __be32
d0a381dd 3397nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
a77c806f 3398 __be32 nfserr, struct svc_export *exp)
dcb488a3 3399{
676e4ebd 3400 u32 i, nflavs, supported;
4796f457
BF		 3401 struct exp_flavor_info *flavs;
3402 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3403 __be32 *p, *flavorsp;
3404 static bool report = true;
dcb488a3
AA		 3405
3406 if (nfserr)
3407 goto out;
d0a381dd 3408 nfserr = nfserr_resource;
4796f457
BF		 3409 if (exp->ex_nflavors) {
3410 flavs = exp->ex_flavors;
3411 nflavs = exp->ex_nflavors;
3412 } else { /* Handling of some defaults in absence of real secinfo: */
3413 flavs = def_flavs;
3414 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3415 nflavs = 2;
3416 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3417 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3418 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3419 nflavs = 1;
3420 flavs[0].pseudoflavor
3421 = svcauth_gss_flavor(exp->ex_client);
3422 } else {
3423 nflavs = 1;
3424 flavs[0].pseudoflavor
3425 = exp->ex_client->flavour->flavour;
3426 }
3427 }
3428
676e4ebd 3429 supported = 0;
d0a381dd
BF		 3430 p = xdr_reserve_space(xdr, 4);
3431 if (!p)
3432 goto out;
676e4ebd 3433 flavorsp = p++; /* to be backfilled later */
676e4ebd 3434
4796f457 3435 for (i = 0; i < nflavs; i++) {
676e4ebd 3436 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3437 struct rpcsec_gss_info info;
dcb488a3 3438
676e4ebd
CL		 3439 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3440 supported++;
d0a381dd
BF		 3441 p = xdr_reserve_space(xdr, 4 + 4 +
3442 XDR_LEN(info.oid.len) + 4 + 4);
3443 if (!p)
3444 goto out;
c373b0a4 3445 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 3446 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 3447 *p++ = cpu_to_be32(info.qop);
3448 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 3449 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3450 supported++;
d0a381dd
BF		 3451 p = xdr_reserve_space(xdr, 4);
3452 if (!p)
3453 goto out;
c373b0a4 3454 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 3455 } else {
3456 if (report)
3457 pr_warn("NFS: SECINFO: security flavor %u "
3458 "is not supported\n", pf);
dcb488a3
AA		 3459 }
3460 }
a77c806f 3461
676e4ebd
CL		 3462 if (nflavs != supported)
3463 report = false;
3464 *flavorsp = htonl(supported);
d0a381dd 3465 nfserr = 0;
dcb488a3
AA		 3466out:
3467 if (exp)
3468 exp_put(exp);
695e12f8 3469 return nfserr;
dcb488a3
AA		 3470}
3471
22b6dee8
MJ		 3472static __be32
3473nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3474 struct nfsd4_secinfo *secinfo)
3475{
d0a381dd
BF		 3476 struct xdr_stream *xdr = &resp->xdr;
3477
3478 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
22b6dee8
MJ		 3479}
3480
3481static __be32
3482nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3483 struct nfsd4_secinfo_no_name *secinfo)
3484{
d0a381dd
BF		 3485 struct xdr_stream *xdr = &resp->xdr;
3486
3487 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
22b6dee8
MJ		 3488}
3489
1da177e4
LT		 3490/*
3491 * The SETATTR encode routine is special -- it always encodes a bitmap,
3492 * regardless of the error status.
3493 */
695e12f8 3494static __be32
b37ad28b 3495nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3496{
d0a381dd 3497 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3498 __be32 *p;
1da177e4 3499
d0a381dd
BF		 3500 p = xdr_reserve_space(xdr, 16);
3501 if (!p)
3502 return nfserr_resource;
1da177e4 3503 if (nfserr) {
c373b0a4
BF		 3504 *p++ = cpu_to_be32(3);
3505 *p++ = cpu_to_be32(0);
3506 *p++ = cpu_to_be32(0);
3507 *p++ = cpu_to_be32(0);
1da177e4
LT		 3508 }
3509 else {
c373b0a4
BF		 3510 *p++ = cpu_to_be32(3);
3511 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3512 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3513 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 3514 }
695e12f8 3515 return nfserr;
1da177e4
LT		 3516}
3517
695e12f8 3518static __be32
b37ad28b 3519nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3520{
d0a381dd 3521 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3522 __be32 *p;
1da177e4
LT		 3523
3524 if (!nfserr) {
d0a381dd
BF		 3525 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3526 if (!p)
3527 return nfserr_resource;
0c0c267b
BF		 3528 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3529 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3530 NFS4_VERIFIER_SIZE);
1da177e4
LT		 3531 }
3532 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3533 p = xdr_reserve_space(xdr, 8);
3534 if (!p)
3535 return nfserr_resource;
c373b0a4
BF		 3536 *p++ = cpu_to_be32(0);
3537 *p++ = cpu_to_be32(0);
1da177e4 3538 }
695e12f8 3539 return nfserr;
1da177e4
LT		 3540}
3541
695e12f8 3542static __be32
b37ad28b 3543nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3544{
d0a381dd 3545 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3546 __be32 *p;
1da177e4
LT		 3547
3548 if (!nfserr) {
d0a381dd
BF		 3549 p = xdr_reserve_space(xdr, 16);
3550 if (!p)
3551 return nfserr_resource;
c373b0a4
BF		 3552 *p++ = cpu_to_be32(write->wr_bytes_written);
3553 *p++ = cpu_to_be32(write->wr_how_written);
0c0c267b
BF		 3554 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3555 NFS4_VERIFIER_SIZE);
1da177e4 3556 }
695e12f8 3557 return nfserr;
1da177e4
LT		 3558}
3559
57266a6e
BF		 3560static const u32 nfs4_minimal_spo_must_enforce[2] = {
3561 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3562 1 << (OP_EXCHANGE_ID - 32) |
3563 1 << (OP_CREATE_SESSION - 32) |
3564 1 << (OP_DESTROY_SESSION - 32) |
3565 1 << (OP_DESTROY_CLIENTID - 32)
3566};
3567
2db134eb 3568static __be32
57b7b43b 3569nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3570 struct nfsd4_exchange_id *exid)
3571{
d0a381dd 3572 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3573 __be32 *p;
0733d213
AA		 3574 char *major_id;
3575 char *server_scope;
3576 int major_id_sz;
3577 int server_scope_sz;
3578 uint64_t minor_id = 0;
3579
3580 if (nfserr)
3581 return nfserr;
3582
3583 major_id = utsname()->nodename;
3584 major_id_sz = strlen(major_id);
3585 server_scope = utsname()->nodename;
3586 server_scope_sz = strlen(server_scope);
3587
d0a381dd 3588 p = xdr_reserve_space(xdr,
0733d213
AA		 3589 8 /* eir_clientid */ +
3590 4 /* eir_sequenceid */ +
3591 4 /* eir_flags */ +
a8bb84bc 3592 4 /* spr_how */);
d0a381dd
BF		 3593 if (!p)
3594 return nfserr_resource;
0733d213 3595
0c0c267b 3596 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 3597 *p++ = cpu_to_be32(exid->seqid);
3598 *p++ = cpu_to_be32(exid->flags);
0733d213 3599
c373b0a4 3600 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 3601
57266a6e
BF		 3602 switch (exid->spa_how) {
3603 case SP4_NONE:
3604 break;
3605 case SP4_MACH_CRED:
a8bb84bc 3606 /* spo_must_enforce, spo_must_allow */
d0a381dd
BF		 3607 p = xdr_reserve_space(xdr, 16);
3608 if (!p)
3609 return nfserr_resource;
a8bb84bc 3610
57266a6e 3611 /* spo_must_enforce bitmap: */
c373b0a4
BF		 3612 *p++ = cpu_to_be32(2);
3613 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3614 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
57266a6e 3615 /* empty spo_must_allow bitmap: */
c373b0a4 3616 *p++ = cpu_to_be32(0);
a8bb84bc 3617
57266a6e
BF		 3618 break;
3619 default:
3620 WARN_ON_ONCE(1);
3621 }
0733d213 3622
d0a381dd 3623 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3624 8 /* so_minor_id */ +
3625 4 /* so_major_id.len */ +
3626 (XDR_QUADLEN(major_id_sz) * 4) +
3627 4 /* eir_server_scope.len */ +
3628 (XDR_QUADLEN(server_scope_sz) * 4) +
3629 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3630 if (!p)
3631 return nfserr_resource;
a8bb84bc 3632
0733d213 3633 /* The server_owner struct */
b64c7f3b 3634 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 3635 /* major id */
0c0c267b 3636 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 3637
3638 /* Server scope */
0c0c267b 3639 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 3640
3641 /* Implementation id */
c373b0a4 3642 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 3643 return 0;
2db134eb
AA		 3644}
3645
3646static __be32
57b7b43b 3647nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3648 struct nfsd4_create_session *sess)
3649{
d0a381dd 3650 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3651 __be32 *p;
ec6b5d7b
AA		 3652
3653 if (nfserr)
3654 return nfserr;
3655
d0a381dd
BF		 3656 p = xdr_reserve_space(xdr, 24);
3657 if (!p)
3658 return nfserr_resource;
0c0c267b
BF		 3659 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3660 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3661 *p++ = cpu_to_be32(sess->seqid);
3662 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 3663
d0a381dd
BF		 3664 p = xdr_reserve_space(xdr, 28);
3665 if (!p)
3666 return nfserr_resource;
c373b0a4
BF		 3667 *p++ = cpu_to_be32(0); /* headerpadsz */
3668 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3669 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3670 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3671 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3672 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3673 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3674
3675 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 3676 p = xdr_reserve_space(xdr, 4);
3677 if (!p)
3678 return nfserr_resource;
c373b0a4 3679 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 3680 }
3681
d0a381dd
BF		 3682 p = xdr_reserve_space(xdr, 28);
3683 if (!p)
3684 return nfserr_resource;
c373b0a4
BF		 3685 *p++ = cpu_to_be32(0); /* headerpadsz */
3686 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3687 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3688 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3689 *p++ = cpu_to_be32(sess->back_channel.maxops);
3690 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3691 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3692
3693 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 3694 p = xdr_reserve_space(xdr, 4);
3695 if (!p)
3696 return nfserr_resource;
c373b0a4 3697 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 3698 }
3699 return 0;
2db134eb
AA		 3700}
3701
c47d832b 3702static __be32
57b7b43b 3703nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3704 struct nfsd4_sequence *seq)
3705{
d0a381dd 3706 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3707 __be32 *p;
b85d4c01
BH		 3708
3709 if (nfserr)
3710 return nfserr;
3711
d0a381dd
BF		 3712 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3713 if (!p)
3714 return nfserr_resource;
0c0c267b
BF		 3715 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
3716 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3717 *p++ = cpu_to_be32(seq->seqid);
3718 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 3719 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 3720 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
3721 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
3722 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 3723
f5236013 3724 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 3725 return 0;
2db134eb
AA		 3726}
3727
2355c596 3728static __be32
57b7b43b 3729nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3730 struct nfsd4_test_stateid *test_stateid)
3731{
d0a381dd 3732 struct xdr_stream *xdr = &resp->xdr;
03cfb420 3733 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3734 __be32 *p;
17456804 3735
a11fcce1
BF		 3736 if (nfserr)
3737 return nfserr;
3738
d0a381dd
BF		 3739 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3740 if (!p)
3741 return nfserr_resource;
17456804 3742 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3743
03cfb420 3744 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3745 *p++ = stateid->ts_id_status;
17456804 3746 }
17456804
BS		 3747
3748 return nfserr;
3749}
3750
695e12f8
BH		 3751static __be32
3752nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3753{
3754 return nfserr;
3755}
3756
3757typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3758
2db134eb
AA		 3759/*
3760 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3761 * since we don't need to filter out obsolete ops as this is
3762 * done in the decoding phase.
3763 */
695e12f8 3764static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3765 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3766 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3767 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3768 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3769 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3770 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3771 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3772 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3773 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3774 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3775 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3776 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3777 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3778 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3779 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3780 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3781 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3782 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3783 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3784 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3785 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3786 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3787 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3788 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3789 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3790 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3791 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3792 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3793 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3794 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3795 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3796 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3797 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3798 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3799 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3800 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3801 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3802
3803 /* NFSv4.1 operations */
3804 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3805 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3806 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3807 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 3808 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3809 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3810 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3811 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3812 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3813 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3814 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3815 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3816 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3817 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3818 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3819 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3820 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3821 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3822 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3823};
3824
496c262c 3825/*
a8095f7e
BF		 3826 * Calculate whether we still have space to encode repsize bytes.
3827 * There are two considerations:
3828 * - For NFS versions >=4.1, the size of the reply must stay within
3829 * session limits
3830 * - For all NFS versions, we must stay within limited preallocated
3831 * buffer space.
496c262c 3832 *
a8095f7e
BF		 3833 * This is called before the operation is processed, so can only provide
3834 * an upper estimate. For some nonidempotent operations (such as
3835 * getattr), it's not necessarily a problem if that estimate is wrong,
3836 * as we can fail it after processing without significant side effects.
496c262c 3837 */
a8095f7e 3838__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 3839{
67492c99 3840 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 3841 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 3842
47ee5298
BF		 3843 if (buf->len + respsize <= buf->buflen)
3844 return nfs_ok;
3845 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 3846 return nfserr_resource;
47ee5298
BF		 3847 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
3848 WARN_ON_ONCE(1);
3849 return nfserr_rep_too_big_to_cache;
ea8d7720 3850 }
47ee5298 3851 return nfserr_rep_too_big;
496c262c
AA		 3852}
3853
1da177e4
LT		 3854void
3855nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3856{
082d4bd7 3857 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 3858 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 3859 struct svc_rqst *rqstp = resp->rqstp;
082d4bd7 3860 int post_err_offset;
07d1f802 3861 nfsd4_enc encoder;
bc749ca4 3862 __be32 *p;
1da177e4 3863
d0a381dd
BF		 3864 p = xdr_reserve_space(xdr, 8);
3865 if (!p) {
3866 WARN_ON_ONCE(1);
3867 return;
3868 }
c373b0a4 3869 *p++ = cpu_to_be32(op->opnum);
082d4bd7 3870 post_err_offset = xdr->buf->len;
1da177e4 3871
695e12f8
BH		 3872 if (op->opnum == OP_ILLEGAL)
3873 goto status;
3874 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3875 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 3876 encoder = nfsd4_enc_ops[op->opnum];
3877 op->status = encoder(resp, op->status, &op->u);
2825a7f9
BF		 3878 xdr_commit_encode(xdr);
3879
067e1ace 3880 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 3881 if (!op->status) {
3882 int space_needed = 0;
3883 if (!nfsd4_last_compound_op(rqstp))
3884 space_needed = COMPOUND_ERR_SLACK_SPACE;
3885 op->status = nfsd4_check_resp_size(resp, space_needed);
3886 }
c8f13d97
BF		 3887 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
3888 struct nfsd4_slot *slot = resp->cstate.slot;
3889
3890 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
3891 op->status = nfserr_rep_too_big_to_cache;
3892 else
3893 op->status = nfserr_rep_too_big;
3894 }
07d1f802
BF		 3895 if (op->status == nfserr_resource ||
3896 op->status == nfserr_rep_too_big ||
3897 op->status == nfserr_rep_too_big_to_cache) {
3898 /*
3899 * The operation may have already been encoded or
3900 * partially encoded. No op returns anything additional
3901 * in the case of one of these three errors, so we can
3902 * just truncate back to after the status. But it's a
3903 * bug if we had to do this on a non-idempotent op:
3904 */
3905 warn_on_nonidempotent_op(op);
082d4bd7 3906 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 3907 }
9411b1d4 3908 if (so) {
082d4bd7
BF		 3909 int len = xdr->buf->len - post_err_offset;
3910
9411b1d4 3911 so->so_replay.rp_status = op->status;
082d4bd7
BF		 3912 so->so_replay.rp_buflen = len;
3913 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
3914 so->so_replay.rp_buf, len);
9411b1d4 3915 }
695e12f8 3916status:
082d4bd7
BF		 3917 /* Note that op->status is already in network byte order: */
3918 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 3919}
3920
3921/*
3922 * Encode the reply stored in the stateowner reply cache
3923 *
3924 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3925 * previously sent already encoded operation.
3926 *
3927 * called with nfs4_lock_state() held
3928 */
3929void
d0a381dd 3930nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 3931{
bc749ca4 3932 __be32 *p;
1da177e4
LT		 3933 struct nfs4_replay *rp = op->replay;
3934
3935 BUG_ON(!rp);
3936
d0a381dd
BF		 3937 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
3938 if (!p) {
3939 WARN_ON_ONCE(1);
3940 return;
3941 }
c373b0a4 3942 *p++ = cpu_to_be32(op->opnum);
1da177e4 3943 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 3944
0c0c267b 3945 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 3946}
3947
1da177e4 3948int
2ebbc012 3949nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3950{
3951 return xdr_ressize_check(rqstp, p);
3952}
3953
3e98abff 3954int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3955{
3e98abff
BF		 3956 struct svc_rqst *rqstp = rq;
3957 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3958
1da177e4
LT		 3959 if (args->ops != args->iops) {
3960 kfree(args->ops);
3961 args->ops = args->iops;
3962 }
f99d49ad
JJ		 3963 kfree(args->tmpp);
3964 args->tmpp = NULL;
1da177e4
LT		 3965 while (args->to_free) {
3966 struct tmpbuf *tb = args->to_free;
3967 args->to_free = tb->next;
3968 tb->release(tb->buf);
3969 kfree(tb);
3970 }
3e98abff 3971 return 1;
1da177e4
LT		 3972}
3973
3974int
2ebbc012 3975nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3976{
e874f9f8
JL		 3977 if (rqstp->rq_arg.head[0].iov_len % 4) {
3978 /* client is nuts */
3979 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
3980 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
3981 return 0;
3982 }
1da177e4
LT		 3983 args->p = p;
3984 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3985 args->pagelist = rqstp->rq_arg.pages;
3986 args->pagelen = rqstp->rq_arg.page_len;
3987 args->tmpp = NULL;
3988 args->to_free = NULL;
3989 args->ops = args->iops;
3990 args->rqstp = rqstp;
3991
3e98abff 3992 return !nfsd4_decode_compound(args);
1da177e4
LT		 3993}
3994
3995int
2ebbc012 3996nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3997{
3998 /*
3999 * All that remains is to write the tag and operation count...
4000 */
557ce264 4001 struct nfsd4_compound_state *cs = &resp->cstate;
6ac90391
BF		 4002 struct xdr_buf *buf = resp->xdr.buf;
4003
4004 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4005 buf->tail[0].iov_len);
dd97fdde 4006
2825a7f9
BF		 4007 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4008
1da177e4
LT		 4009 p = resp->tagp;
4010 *p++ = htonl(resp->taglen);
4011 memcpy(p, resp->tag, resp->taglen);
4012 p += XDR_QUADLEN(resp->taglen);
4013 *p++ = htonl(resp->opcnt);
4014
26c0c75e 4015 if (nfsd4_has_session(cs)) {
f0f51f5c
BF		 4016 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4017 struct nfs4_client *clp = cs->session->se_client;
26c0c75e
BF		 4018 if (cs->status != nfserr_replay_cache) {
4019 nfsd4_store_cache_entry(resp);
73e79482 4020 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 4021 }
d7682988 4022 /* Renew the clientid on success and on replay */
f0f51f5c 4023 spin_lock(&nn->client_lock);
221a6876 4024 nfsd4_put_session(cs->session);
f0f51f5c
BF		 4025 spin_unlock(&nn->client_lock);
4026 put_client_renew(clp);
da3846a2 4027 }
1da177e4
LT		 4028 return 1;
4029}
4030
4031/*
4032 * Local variables:
4033 * c-basic-offset: 8
4034 * End:
4035 */
Michael's Linux tree.