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NFSD: Fold fault_inject.h into state.h
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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
1da177e4
LT		 58#define NFSDDBG_FACILITY NFSDDBG_XDR
59
42ca0993
BF		 60/*
61 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
62 * directory in order to indicate to the client that a filesystem boundary is present
63 * We use a fixed fsid for a referral
64 */
65#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
66#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
67
b37ad28b 68static __be32
a36b1725 69check_filename(char *str, int len)
1da177e4
LT		 70{
71 int i;
72
73 if (len == 0)
74 return nfserr_inval;
75 if (isdotent(str, len))
a36b1725 76 return nfserr_badname;
1da177e4
LT		 77 for (i = 0; i < len; i++)
78 if (str[i] == '/')
a36b1725 79 return nfserr_badname;
1da177e4
LT		 80 return 0;
81}
82
1da177e4 83#define DECODE_HEAD \
2ebbc012 84 __be32 *p; \
b37ad28b 85 __be32 status
1da177e4
LT		 86#define DECODE_TAIL \
87 status = 0; \
88out: \
89 return status; \
90xdr_error: \
817cb9d4
CL		 91 dprintk("NFSD: xdr error (%s:%d)\n", \
92 __FILE__, __LINE__); \
1da177e4
LT		 93 status = nfserr_bad_xdr; \
94 goto out
95
96#define READ32(x) (x) = ntohl(*p++)
97#define READ64(x) do { \
98 (x) = (u64)ntohl(*p++) << 32; \
99 (x) |= ntohl(*p++); \
100} while (0)
101#define READTIME(x) do { \
102 p++; \
103 (x) = ntohl(*p++); \
104 p++; \
105} while (0)
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
ca2a05aa 137static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 138{
139 /* We want more bytes than seem to be available.
140 * Maybe we need a new page, maybe we have just run out
141 */
ca2a05aa 142 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 143 __be32 *p;
1da177e4
LT		 144 if (avail + argp->pagelen < nbytes)
145 return NULL;
146 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
147 return NULL;
148 /* ok, we can do it with the current plus the next page */
149 if (nbytes <= sizeof(argp->tmp))
150 p = argp->tmp;
151 else {
f99d49ad 152 kfree(argp->tmpp);
1da177e4
LT		 153 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
154 if (!p)
155 return NULL;
156
157 }
ca2a05aa
BF		 158 /*
159 * The following memcpy is safe because read_buf is always
160 * called with nbytes > avail, and the two cases above both
161 * guarantee p points to at least nbytes bytes.
162 */
1da177e4
LT		 163 memcpy(p, argp->p, avail);
164 /* step to next page */
165 argp->p = page_address(argp->pagelist[0]);
166 argp->pagelist++;
167 if (argp->pagelen < PAGE_SIZE) {
2bc3c117 168 argp->end = argp->p + (argp->pagelen>>2);
1da177e4
LT		 169 argp->pagelen = 0;
170 } else {
2bc3c117 171 argp->end = argp->p + (PAGE_SIZE>>2);
1da177e4
LT		 172 argp->pagelen -= PAGE_SIZE;
173 }
174 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
175 argp->p += XDR_QUADLEN(nbytes - avail);
176 return p;
177}
178
60adfc50
AA		 179static int zero_clientid(clientid_t *clid)
180{
181 return (clid->cl_boot == 0) && (clid->cl_id == 0);
182}
183
1da177e4
LT		 184static int
185defer_free(struct nfsd4_compoundargs *argp,
186 void (*release)(const void *), void *p)
187{
188 struct tmpbuf *tb;
189
190 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
191 if (!tb)
192 return -ENOMEM;
193 tb->buf = p;
194 tb->release = release;
195 tb->next = argp->to_free;
196 argp->to_free = tb;
197 return 0;
198}
199
2ebbc012 200static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 201{
1da177e4 202 if (p == argp->tmp) {
67114fe6 203 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
a4db5fe5
BF		 204 if (!p)
205 return NULL;
1da177e4 206 } else {
73dff8be 207 BUG_ON(p != argp->tmpp);
1da177e4
LT		 208 argp->tmpp = NULL;
209 }
210 if (defer_free(argp, kfree, p)) {
a4db5fe5 211 kfree(p);
1da177e4
LT		 212 return NULL;
213 } else
214 return (char *)p;
215}
216
b37ad28b 217static __be32
1da177e4
LT		 218nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
219{
220 u32 bmlen;
221 DECODE_HEAD;
222
223 bmval[0] = 0;
224 bmval[1] = 0;
7e705706 225 bmval[2] = 0;
1da177e4
LT		 226
227 READ_BUF(4);
228 READ32(bmlen);
229 if (bmlen > 1000)
230 goto xdr_error;
231
232 READ_BUF(bmlen << 2);
233 if (bmlen > 0)
234 READ32(bmval[0]);
235 if (bmlen > 1)
236 READ32(bmval[1]);
7e705706
AA		 237 if (bmlen > 2)
238 READ32(bmval[2]);
1da177e4
LT		 239
240 DECODE_TAIL;
241}
242
b37ad28b 243static __be32
3c8e0316 244nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
c0d6fc8a 245 struct iattr *iattr, struct nfs4_acl **acl)
1da177e4
LT		 246{
247 int expected_len, len = 0;
248 u32 dummy32;
249 char *buf;
b8dd7b9a 250 int host_err;
1da177e4
LT		 251
252 DECODE_HEAD;
253 iattr->ia_valid = 0;
254 if ((status = nfsd4_decode_bitmap(argp, bmval)))
255 return status;
256
1da177e4
LT		 257 READ_BUF(4);
258 READ32(expected_len);
259
260 if (bmval[0] & FATTR4_WORD0_SIZE) {
261 READ_BUF(8);
262 len += 8;
263 READ64(iattr->ia_size);
264 iattr->ia_valid |= ATTR_SIZE;
265 }
266 if (bmval[0] & FATTR4_WORD0_ACL) {
28e05dd8
BF		 267 int nace;
268 struct nfs4_ace *ace;
1da177e4
LT		 269
270 READ_BUF(4); len += 4;
271 READ32(nace);
272
28e05dd8
BF		 273 if (nace > NFS4_ACL_MAX)
274 return nfserr_resource;
275
276 *acl = nfs4_acl_new(nace);
1da177e4 277 if (*acl == NULL) {
b8dd7b9a 278 host_err = -ENOMEM;
1da177e4
LT		 279 goto out_nfserr;
280 }
28e05dd8 281 defer_free(argp, kfree, *acl);
1da177e4 282
28e05dd8
BF		 283 (*acl)->naces = nace;
284 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 285 READ_BUF(16); len += 16;
28e05dd8
BF		 286 READ32(ace->type);
287 READ32(ace->flag);
288 READ32(ace->access_mask);
1da177e4
LT		 289 READ32(dummy32);
290 READ_BUF(dummy32);
291 len += XDR_QUADLEN(dummy32) << 2;
292 READMEM(buf, dummy32);
28e05dd8 293 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 294 status = nfs_ok;
28e05dd8
BF		 295 if (ace->whotype != NFS4_ACL_WHO_NAMED)
296 ace->who = 0;
297 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 298 status = nfsd_map_name_to_gid(argp->rqstp,
28e05dd8 299 buf, dummy32, &ace->who);
1da177e4 300 else
3c726023 301 status = nfsd_map_name_to_uid(argp->rqstp,
28e05dd8 302 buf, dummy32, &ace->who);
3c726023
BF		 303 if (status)
304 return status;
1da177e4
LT		 305 }
306 } else
307 *acl = NULL;
308 if (bmval[1] & FATTR4_WORD1_MODE) {
309 READ_BUF(4);
310 len += 4;
311 READ32(iattr->ia_mode);
312 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
313 iattr->ia_valid |= ATTR_MODE;
314 }
315 if (bmval[1] & FATTR4_WORD1_OWNER) {
316 READ_BUF(4);
317 len += 4;
318 READ32(dummy32);
319 READ_BUF(dummy32);
320 len += (XDR_QUADLEN(dummy32) << 2);
321 READMEM(buf, dummy32);
47c85291
N		 322 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
323 return status;
1da177e4
LT		 324 iattr->ia_valid |= ATTR_UID;
325 }
326 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
327 READ_BUF(4);
328 len += 4;
329 READ32(dummy32);
330 READ_BUF(dummy32);
331 len += (XDR_QUADLEN(dummy32) << 2);
332 READMEM(buf, dummy32);
47c85291
N		 333 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
334 return status;
1da177e4
LT		 335 iattr->ia_valid |= ATTR_GID;
336 }
337 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
338 READ_BUF(4);
339 len += 4;
340 READ32(dummy32);
341 switch (dummy32) {
342 case NFS4_SET_TO_CLIENT_TIME:
343 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
344 all 32 bits of 'nseconds'. */
345 READ_BUF(12);
346 len += 12;
347 READ32(dummy32);
348 if (dummy32)
349 return nfserr_inval;
350 READ32(iattr->ia_atime.tv_sec);
351 READ32(iattr->ia_atime.tv_nsec);
352 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
353 return nfserr_inval;
354 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
355 break;
356 case NFS4_SET_TO_SERVER_TIME:
357 iattr->ia_valid |= ATTR_ATIME;
358 break;
359 default:
360 goto xdr_error;
361 }
362 }
1da177e4
LT		 363 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
364 READ_BUF(4);
365 len += 4;
366 READ32(dummy32);
367 switch (dummy32) {
368 case NFS4_SET_TO_CLIENT_TIME:
369 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
370 all 32 bits of 'nseconds'. */
371 READ_BUF(12);
372 len += 12;
373 READ32(dummy32);
374 if (dummy32)
375 return nfserr_inval;
376 READ32(iattr->ia_mtime.tv_sec);
377 READ32(iattr->ia_mtime.tv_nsec);
378 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
379 return nfserr_inval;
380 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
381 break;
382 case NFS4_SET_TO_SERVER_TIME:
383 iattr->ia_valid |= ATTR_MTIME;
384 break;
385 default:
386 goto xdr_error;
387 }
388 }
3c8e0316
YZ		 389 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
390 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
391 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
392 READ_BUF(expected_len - len);
393 else if (len != expected_len)
1da177e4
LT		 394 goto xdr_error;
395
396 DECODE_TAIL;
397
398out_nfserr:
b8dd7b9a 399 status = nfserrno(host_err);
1da177e4
LT		 400 goto out;
401}
402
e31a1b66
BH		 403static __be32
404nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
405{
406 DECODE_HEAD;
407
408 READ_BUF(sizeof(stateid_t));
409 READ32(sid->si_generation);
410 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
411
412 DECODE_TAIL;
413}
414
b37ad28b 415static __be32
1da177e4
LT		 416nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
417{
418 DECODE_HEAD;
419
420 READ_BUF(4);
421 READ32(access->ac_req_access);
422
423 DECODE_TAIL;
424}
425
acb2887e
BF		 426static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
427{
428 DECODE_HEAD;
12fc3e92 429 u32 dummy, uid, gid;
acb2887e
BF		 430 char *machine_name;
431 int i;
432 int nr_secflavs;
433
434 /* callback_sec_params4 */
435 READ_BUF(4);
436 READ32(nr_secflavs);
12fc3e92 437 cbs->flavor = (u32)(-1);
acb2887e
BF		 438 for (i = 0; i < nr_secflavs; ++i) {
439 READ_BUF(4);
440 READ32(dummy);
441 switch (dummy) {
442 case RPC_AUTH_NULL:
443 /* Nothing to read */
12fc3e92
BF		 444 if (cbs->flavor == (u32)(-1))
445 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 446 break;
447 case RPC_AUTH_UNIX:
448 READ_BUF(8);
449 /* stamp */
450 READ32(dummy);
451
452 /* machine name */
453 READ32(dummy);
454 READ_BUF(dummy);
455 SAVEMEM(machine_name, dummy);
456
457 /* uid, gid */
458 READ_BUF(8);
12fc3e92
BF		 459 READ32(uid);
460 READ32(gid);
acb2887e
BF		 461
462 /* more gids */
463 READ_BUF(4);
464 READ32(dummy);
465 READ_BUF(dummy * 4);
12fc3e92
BF		 466 if (cbs->flavor == (u32)(-1)) {
467 cbs->uid = uid;
468 cbs->gid = gid;
469 cbs->flavor = RPC_AUTH_UNIX;
470 }
acb2887e
BF		 471 break;
472 case RPC_AUTH_GSS:
473 dprintk("RPC_AUTH_GSS callback secflavor "
474 "not supported!\n");
475 READ_BUF(8);
476 /* gcbp_service */
477 READ32(dummy);
478 /* gcbp_handle_from_server */
479 READ32(dummy);
480 READ_BUF(dummy);
481 p += XDR_QUADLEN(dummy);
482 /* gcbp_handle_from_client */
483 READ_BUF(4);
484 READ32(dummy);
485 READ_BUF(dummy);
486 break;
487 default:
488 dprintk("Illegal callback secflavor\n");
489 return nfserr_inval;
490 }
491 }
492 DECODE_TAIL;
493}
494
cb73a9f4
BF		 495static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
496{
497 DECODE_HEAD;
498
499 READ_BUF(4);
500 READ32(bc->bc_cb_program);
501 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
502
503 DECODE_TAIL;
504}
505
1d1bc8f2
BF		 506static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
507{
508 DECODE_HEAD;
1d1bc8f2
BF		 509
510 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
511 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
512 READ32(bcts->dir);
6ce2357f
BS		 513 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
514 * could help us figure out we should be using it. */
1d1bc8f2
BF		 515 DECODE_TAIL;
516}
517
b37ad28b 518static __be32
1da177e4
LT		 519nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
520{
521 DECODE_HEAD;
522
e31a1b66 523 READ_BUF(4);
1da177e4 524 READ32(close->cl_seqid);
e31a1b66 525 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 526
527 DECODE_TAIL;
528}
529
530
b37ad28b 531static __be32
1da177e4
LT		 532nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
533{
534 DECODE_HEAD;
535
536 READ_BUF(12);
537 READ64(commit->co_offset);
538 READ32(commit->co_count);
539
540 DECODE_TAIL;
541}
542
b37ad28b 543static __be32
1da177e4
LT		 544nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
545{
546 DECODE_HEAD;
547
548 READ_BUF(4);
549 READ32(create->cr_type);
550 switch (create->cr_type) {
551 case NF4LNK:
552 READ_BUF(4);
553 READ32(create->cr_linklen);
554 READ_BUF(create->cr_linklen);
555 SAVEMEM(create->cr_linkname, create->cr_linklen);
556 break;
557 case NF4BLK:
558 case NF4CHR:
559 READ_BUF(8);
560 READ32(create->cr_specdata1);
561 READ32(create->cr_specdata2);
562 break;
563 case NF4SOCK:
564 case NF4FIFO:
565 case NF4DIR:
566 default:
567 break;
568 }
569
570 READ_BUF(4);
571 READ32(create->cr_namelen);
572 READ_BUF(create->cr_namelen);
573 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 574 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 575 return status;
576
3c8e0316
YZ		 577 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
578 &create->cr_acl);
c0d6fc8a 579 if (status)
1da177e4
LT		 580 goto out;
581
582 DECODE_TAIL;
583}
584
b37ad28b 585static inline __be32
1da177e4
LT		 586nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
587{
e31a1b66 588 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 589}
590
b37ad28b 591static inline __be32
1da177e4
LT		 592nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
593{
594 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
595}
596
b37ad28b 597static __be32
1da177e4
LT		 598nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
599{
600 DECODE_HEAD;
601
602 READ_BUF(4);
603 READ32(link->li_namelen);
604 READ_BUF(link->li_namelen);
605 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 606 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 607 return status;
608
609 DECODE_TAIL;
610}
611
b37ad28b 612static __be32
1da177e4
LT		 613nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
614{
615 DECODE_HEAD;
616
1da177e4
LT		 617 /*
618 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
619 */
620 READ_BUF(28);
621 READ32(lock->lk_type);
622 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
623 goto xdr_error;
624 READ32(lock->lk_reclaim);
625 READ64(lock->lk_offset);
626 READ64(lock->lk_length);
627 READ32(lock->lk_is_new);
628
629 if (lock->lk_is_new) {
e31a1b66 630 READ_BUF(4);
1da177e4 631 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 632 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
633 if (status)
634 return status;
635 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 636 READ32(lock->lk_new_lock_seqid);
637 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
638 READ32(lock->lk_new_owner.len);
639 READ_BUF(lock->lk_new_owner.len);
640 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
641 } else {
e31a1b66
BH		 642 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
643 if (status)
644 return status;
645 READ_BUF(4);
1da177e4
LT		 646 READ32(lock->lk_old_lock_seqid);
647 }
648
649 DECODE_TAIL;
650}
651
b37ad28b 652static __be32
1da177e4
LT		 653nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
654{
655 DECODE_HEAD;
656
657 READ_BUF(32);
658 READ32(lockt->lt_type);
659 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
660 goto xdr_error;
661 READ64(lockt->lt_offset);
662 READ64(lockt->lt_length);
663 COPYMEM(&lockt->lt_clientid, 8);
664 READ32(lockt->lt_owner.len);
665 READ_BUF(lockt->lt_owner.len);
666 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
667
668 DECODE_TAIL;
669}
670
b37ad28b 671static __be32
1da177e4
LT		 672nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
673{
674 DECODE_HEAD;
675
e31a1b66 676 READ_BUF(8);
1da177e4
LT		 677 READ32(locku->lu_type);
678 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
679 goto xdr_error;
680 READ32(locku->lu_seqid);
e31a1b66
BH		 681 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
682 if (status)
683 return status;
684 READ_BUF(16);
1da177e4
LT		 685 READ64(locku->lu_offset);
686 READ64(locku->lu_length);
687
688 DECODE_TAIL;
689}
690
b37ad28b 691static __be32
1da177e4
LT		 692nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
693{
694 DECODE_HEAD;
695
696 READ_BUF(4);
697 READ32(lookup->lo_len);
698 READ_BUF(lookup->lo_len);
699 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 700 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 701 return status;
702
703 DECODE_TAIL;
704}
705
2c8bd7e0 706static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 707{
708 __be32 *p;
709 u32 w;
710
711 READ_BUF(4);
712 READ32(w);
2c8bd7e0
BH		 713 *share_access = w & NFS4_SHARE_ACCESS_MASK;
714 *deleg_want = w & NFS4_SHARE_WANT_MASK;
715 if (deleg_when)
716 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
717
04f9e664
BF		 718 switch (w & NFS4_SHARE_ACCESS_MASK) {
719 case NFS4_SHARE_ACCESS_READ:
720 case NFS4_SHARE_ACCESS_WRITE:
721 case NFS4_SHARE_ACCESS_BOTH:
722 break;
723 default:
724 return nfserr_bad_xdr;
725 }
fc0d14fe 726 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 727 if (!w)
728 return nfs_ok;
729 if (!argp->minorversion)
730 return nfserr_bad_xdr;
731 switch (w & NFS4_SHARE_WANT_MASK) {
732 case NFS4_SHARE_WANT_NO_PREFERENCE:
733 case NFS4_SHARE_WANT_READ_DELEG:
734 case NFS4_SHARE_WANT_WRITE_DELEG:
735 case NFS4_SHARE_WANT_ANY_DELEG:
736 case NFS4_SHARE_WANT_NO_DELEG:
737 case NFS4_SHARE_WANT_CANCEL:
738 break;
739 default:
740 return nfserr_bad_xdr;
741 }
92bac8c5 742 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 743 if (!w)
744 return nfs_ok;
2c8bd7e0
BH		 745
746 if (!deleg_when) /* open_downgrade */
747 return nfserr_inval;
04f9e664
BF		 748 switch (w) {
749 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
750 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 751 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
752 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 753 return nfs_ok;
754 }
755xdr_error:
756 return nfserr_bad_xdr;
757}
758
759static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
760{
761 __be32 *p;
762
763 READ_BUF(4);
764 READ32(*x);
765 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 766 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 767 return nfserr_bad_xdr;
768 return nfs_ok;
769xdr_error:
770 return nfserr_bad_xdr;
771}
772
a084daf5
BF		 773static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
774{
775 __be32 *p;
776
777 READ_BUF(4);
778 READ32(o->len);
779
780 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
781 return nfserr_bad_xdr;
782
783 READ_BUF(o->len);
784 SAVEMEM(o->data, o->len);
785 return nfs_ok;
786xdr_error:
787 return nfserr_bad_xdr;
788}
789
b37ad28b 790static __be32
1da177e4
LT		 791nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
792{
793 DECODE_HEAD;
2c8bd7e0 794 u32 dummy;
1da177e4
LT		 795
796 memset(open->op_bmval, 0, sizeof(open->op_bmval));
797 open->op_iattr.ia_valid = 0;
fe0750e5 798 open->op_openowner = NULL;
1da177e4
LT		 799
800 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 801 READ_BUF(4);
1da177e4 802 READ32(open->op_seqid);
2c8bd7e0
BH		 803 /* decode, yet ignore deleg_when until supported */
804 status = nfsd4_decode_share_access(argp, &open->op_share_access,
805 &open->op_deleg_want, &dummy);
04f9e664
BF		 806 if (status)
807 goto xdr_error;
808 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
809 if (status)
810 goto xdr_error;
a084daf5 811 READ_BUF(sizeof(clientid_t));
1da177e4 812 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 813 status = nfsd4_decode_opaque(argp, &open->op_owner);
814 if (status)
815 goto xdr_error;
816 READ_BUF(4);
1da177e4
LT		 817 READ32(open->op_create);
818 switch (open->op_create) {
819 case NFS4_OPEN_NOCREATE:
820 break;
821 case NFS4_OPEN_CREATE:
822 READ_BUF(4);
823 READ32(open->op_createmode);
824 switch (open->op_createmode) {
825 case NFS4_CREATE_UNCHECKED:
826 case NFS4_CREATE_GUARDED:
c0d6fc8a 827 status = nfsd4_decode_fattr(argp, open->op_bmval,
3c8e0316 828 &open->op_iattr, &open->op_acl);
c0d6fc8a 829 if (status)
1da177e4
LT		 830 goto out;
831 break;
832 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 833 READ_BUF(NFS4_VERIFIER_SIZE);
834 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 835 break;
79fb54ab
BH		 836 case NFS4_CREATE_EXCLUSIVE4_1:
837 if (argp->minorversion < 1)
838 goto xdr_error;
ab4684d1
CL		 839 READ_BUF(NFS4_VERIFIER_SIZE);
840 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 841 status = nfsd4_decode_fattr(argp, open->op_bmval,
3c8e0316 842 &open->op_iattr, &open->op_acl);
79fb54ab
BH		 843 if (status)
844 goto out;
845 break;
1da177e4
LT		 846 default:
847 goto xdr_error;
848 }
849 break;
850 default:
851 goto xdr_error;
852 }
853
854 /* open_claim */
855 READ_BUF(4);
856 READ32(open->op_claim_type);
857 switch (open->op_claim_type) {
858 case NFS4_OPEN_CLAIM_NULL:
859 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
860 READ_BUF(4);
861 READ32(open->op_fname.len);
862 READ_BUF(open->op_fname.len);
863 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 864 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 865 return status;
866 break;
867 case NFS4_OPEN_CLAIM_PREVIOUS:
868 READ_BUF(4);
869 READ32(open->op_delegate_type);
870 break;
871 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 872 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
873 if (status)
874 return status;
875 READ_BUF(4);
1da177e4
LT		 876 READ32(open->op_fname.len);
877 READ_BUF(open->op_fname.len);
878 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 879 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 880 return status;
881 break;
8b289b2c
BF		 882 case NFS4_OPEN_CLAIM_FH:
883 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
884 if (argp->minorversion < 1)
885 goto xdr_error;
886 /* void */
887 break;
888 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
889 if (argp->minorversion < 1)
890 goto xdr_error;
891 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
892 if (status)
893 return status;
894 break;
1da177e4
LT		 895 default:
896 goto xdr_error;
897 }
898
899 DECODE_TAIL;
900}
901
b37ad28b 902static __be32
1da177e4
LT		 903nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
904{
905 DECODE_HEAD;
906
e31a1b66
BH		 907 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
908 if (status)
909 return status;
910 READ_BUF(4);
1da177e4
LT		 911 READ32(open_conf->oc_seqid);
912
913 DECODE_TAIL;
914}
915
b37ad28b 916static __be32
1da177e4
LT		 917nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
918{
919 DECODE_HEAD;
920
e31a1b66
BH		 921 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
922 if (status)
923 return status;
04f9e664 924 READ_BUF(4);
1da177e4 925 READ32(open_down->od_seqid);
2c8bd7e0
BH		 926 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
927 &open_down->od_deleg_want, NULL);
04f9e664
BF		 928 if (status)
929 return status;
930 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
931 if (status)
932 return status;
1da177e4
LT		 933 DECODE_TAIL;
934}
935
b37ad28b 936static __be32
1da177e4
LT		 937nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
938{
939 DECODE_HEAD;
940
941 READ_BUF(4);
942 READ32(putfh->pf_fhlen);
943 if (putfh->pf_fhlen > NFS4_FHSIZE)
944 goto xdr_error;
945 READ_BUF(putfh->pf_fhlen);
946 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
947
948 DECODE_TAIL;
949}
950
b37ad28b 951static __be32
1da177e4
LT		 952nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
953{
954 DECODE_HEAD;
955
e31a1b66
BH		 956 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
957 if (status)
958 return status;
959 READ_BUF(12);
1da177e4
LT		 960 READ64(read->rd_offset);
961 READ32(read->rd_length);
962
963 DECODE_TAIL;
964}
965
b37ad28b 966static __be32
1da177e4
LT		 967nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
968{
969 DECODE_HEAD;
970
971 READ_BUF(24);
972 READ64(readdir->rd_cookie);
973 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
974 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
975 READ32(readdir->rd_maxcount);
976 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
977 goto out;
978
979 DECODE_TAIL;
980}
981
b37ad28b 982static __be32
1da177e4
LT		 983nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
984{
985 DECODE_HEAD;
986
987 READ_BUF(4);
988 READ32(remove->rm_namelen);
989 READ_BUF(remove->rm_namelen);
990 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 991 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 992 return status;
993
994 DECODE_TAIL;
995}
996
b37ad28b 997static __be32
1da177e4
LT		 998nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
999{
1000 DECODE_HEAD;
1001
1002 READ_BUF(4);
1003 READ32(rename->rn_snamelen);
1004 READ_BUF(rename->rn_snamelen + 4);
1005 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1006 READ32(rename->rn_tnamelen);
1007 READ_BUF(rename->rn_tnamelen);
1008 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1009 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1010 return status;
a36b1725 1011 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1012 return status;
1013
1014 DECODE_TAIL;
1015}
1016
b37ad28b 1017static __be32
1da177e4
LT		 1018nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1019{
1020 DECODE_HEAD;
1021
1022 READ_BUF(sizeof(clientid_t));
1023 COPYMEM(clientid, sizeof(clientid_t));
1024
1025 DECODE_TAIL;
1026}
1027
dcb488a3
AA		 1028static __be32
1029nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1030 struct nfsd4_secinfo *secinfo)
1031{
1032 DECODE_HEAD;
1033
1034 READ_BUF(4);
1035 READ32(secinfo->si_namelen);
1036 READ_BUF(secinfo->si_namelen);
1037 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1038 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1039 if (status)
1040 return status;
1041 DECODE_TAIL;
1042}
1043
04f4ad16
BF		 1044static __be32
1045nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1046 struct nfsd4_secinfo_no_name *sin)
1047{
1048 DECODE_HEAD;
1049
1050 READ_BUF(4);
1051 READ32(sin->sin_style);
1052 DECODE_TAIL;
1053}
1054
b37ad28b 1055static __be32
1da177e4
LT		 1056nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1057{
e31a1b66 1058 __be32 status;
1da177e4 1059
e31a1b66
BH		 1060 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1061 if (status)
1062 return status;
3c8e0316
YZ		 1063 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1064 &setattr->sa_acl);
1da177e4
LT		 1065}
1066
b37ad28b 1067static __be32
1da177e4
LT		 1068nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1069{
1070 DECODE_HEAD;
1071
ab4684d1
CL		 1072 READ_BUF(NFS4_VERIFIER_SIZE);
1073 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1074
a084daf5
BF		 1075 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1076 if (status)
1077 return nfserr_bad_xdr;
1078 READ_BUF(8);
1da177e4
LT		 1079 READ32(setclientid->se_callback_prog);
1080 READ32(setclientid->se_callback_netid_len);
1081
1082 READ_BUF(setclientid->se_callback_netid_len + 4);
1083 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1084 READ32(setclientid->se_callback_addr_len);
1085
1086 READ_BUF(setclientid->se_callback_addr_len + 4);
1087 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1088 READ32(setclientid->se_callback_ident);
1089
1090 DECODE_TAIL;
1091}
1092
b37ad28b 1093static __be32
1da177e4
LT		 1094nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1095{
1096 DECODE_HEAD;
1097
ab4684d1 1098 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1099 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1100 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1101
1102 DECODE_TAIL;
1103}
1104
1105/* Also used for NVERIFY */
b37ad28b 1106static __be32
1da177e4
LT		 1107nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1108{
1109#if 0
1110 struct nfsd4_compoundargs save = {
1111 .p = argp->p,
1112 .end = argp->end,
1113 .rqstp = argp->rqstp,
1114 };
1115 u32 ve_bmval[2];
1116 struct iattr ve_iattr; /* request */
1117 struct nfs4_acl *ve_acl; /* request */
1118#endif
1119 DECODE_HEAD;
1120
1121 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1122 goto out;
1123
1124 /* For convenience's sake, we compare raw xdr'd attributes in
1125 * nfsd4_proc_verify; however we still decode here just to return
1126 * correct error in case of bad xdr. */
1127#if 0
1128 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
1129 if (status == nfserr_inval) {
1130 status = nfserrno(status);
1131 goto out;
1132 }
1133#endif
1134 READ_BUF(4);
1135 READ32(verify->ve_attrlen);
1136 READ_BUF(verify->ve_attrlen);
1137 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1138
1139 DECODE_TAIL;
1140}
1141
b37ad28b 1142static __be32
1da177e4
LT		 1143nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1144{
1145 int avail;
1da177e4
LT		 1146 int len;
1147 DECODE_HEAD;
1148
e31a1b66
BH		 1149 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1150 if (status)
1151 return status;
1152 READ_BUF(16);
1da177e4
LT		 1153 READ64(write->wr_offset);
1154 READ32(write->wr_stable_how);
1155 if (write->wr_stable_how > 2)
1156 goto xdr_error;
1157 READ32(write->wr_buflen);
1158
1159 /* Sorry .. no magic macros for this.. *
1160 * READ_BUF(write->wr_buflen);
1161 * SAVEMEM(write->wr_buf, write->wr_buflen);
1162 */
1163 avail = (char*)argp->end - (char*)argp->p;
1164 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1165 dprintk("NFSD: xdr error (%s:%d)\n",
1166 __FILE__, __LINE__);
1da177e4
LT		 1167 goto xdr_error;
1168 }
70cc7f75
BF		 1169 write->wr_head.iov_base = p;
1170 write->wr_head.iov_len = avail;
5a80a54d 1171 WARN_ON(avail != (XDR_QUADLEN(avail) << 2));
70cc7f75 1172 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1173
1174 len = XDR_QUADLEN(write->wr_buflen) << 2;
1175 if (len >= avail) {
1176 int pages;
1177
1178 len -= avail;
1179
1180 pages = len >> PAGE_SHIFT;
1181 argp->pagelist += pages;
1182 argp->pagelen -= pages * PAGE_SIZE;
1183 len -= pages * PAGE_SIZE;
1184
1185 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1186 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1187 }
5a80a54d 1188 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1189
1190 DECODE_TAIL;
1191}
1192
b37ad28b 1193static __be32
1da177e4
LT		 1194nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1195{
1196 DECODE_HEAD;
1197
1198 READ_BUF(12);
1199 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1200 READ32(rlockowner->rl_owner.len);
1201 READ_BUF(rlockowner->rl_owner.len);
1202 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1203
60adfc50
AA		 1204 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1205 return nfserr_inval;
1da177e4
LT		 1206 DECODE_TAIL;
1207}
1208
2db134eb
AA		 1209static __be32
1210nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1211 struct nfsd4_exchange_id *exid)
2db134eb 1212{
5afa040b 1213 int dummy, tmp;
0733d213
AA		 1214 DECODE_HEAD;
1215
1216 READ_BUF(NFS4_VERIFIER_SIZE);
1217 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1218
a084daf5
BF		 1219 status = nfsd4_decode_opaque(argp, &exid->clname);
1220 if (status)
1221 return nfserr_bad_xdr;
0733d213
AA		 1222
1223 READ_BUF(4);
1224 READ32(exid->flags);
1225
1226 /* Ignore state_protect4_a */
1227 READ_BUF(4);
1228 READ32(exid->spa_how);
1229 switch (exid->spa_how) {
1230 case SP4_NONE:
1231 break;
1232 case SP4_MACH_CRED:
1233 /* spo_must_enforce */
1234 READ_BUF(4);
1235 READ32(dummy);
1236 READ_BUF(dummy * 4);
1237 p += dummy;
1238
1239 /* spo_must_allow */
1240 READ_BUF(4);
1241 READ32(dummy);
1242 READ_BUF(dummy * 4);
1243 p += dummy;
1244 break;
1245 case SP4_SSV:
1246 /* ssp_ops */
1247 READ_BUF(4);
1248 READ32(dummy);
1249 READ_BUF(dummy * 4);
1250 p += dummy;
1251
1252 READ_BUF(4);
1253 READ32(dummy);
1254 READ_BUF(dummy * 4);
1255 p += dummy;
1256
1257 /* ssp_hash_algs<> */
1258 READ_BUF(4);
5afa040b
MJ		 1259 READ32(tmp);
1260 while (tmp--) {
1261 READ_BUF(4);
1262 READ32(dummy);
1263 READ_BUF(dummy);
1264 p += XDR_QUADLEN(dummy);
1265 }
0733d213
AA		 1266
1267 /* ssp_encr_algs<> */
1268 READ_BUF(4);
5afa040b
MJ		 1269 READ32(tmp);
1270 while (tmp--) {
1271 READ_BUF(4);
1272 READ32(dummy);
1273 READ_BUF(dummy);
1274 p += XDR_QUADLEN(dummy);
1275 }
0733d213
AA		 1276
1277 /* ssp_window and ssp_num_gss_handles */
1278 READ_BUF(8);
1279 READ32(dummy);
1280 READ32(dummy);
1281 break;
1282 default:
1283 goto xdr_error;
1284 }
1285
1286 /* Ignore Implementation ID */
1287 READ_BUF(4); /* nfs_impl_id4 array length */
1288 READ32(dummy);
1289
1290 if (dummy > 1)
1291 goto xdr_error;
1292
1293 if (dummy == 1) {
1294 /* nii_domain */
1295 READ_BUF(4);
1296 READ32(dummy);
1297 READ_BUF(dummy);
1298 p += XDR_QUADLEN(dummy);
1299
1300 /* nii_name */
1301 READ_BUF(4);
1302 READ32(dummy);
1303 READ_BUF(dummy);
1304 p += XDR_QUADLEN(dummy);
1305
1306 /* nii_date */
1307 READ_BUF(12);
1308 p += 3;
1309 }
1310 DECODE_TAIL;
2db134eb
AA		 1311}
1312
1313static __be32
1314nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1315 struct nfsd4_create_session *sess)
1316{
ec6b5d7b 1317 DECODE_HEAD;
ec6b5d7b 1318 u32 dummy;
ec6b5d7b
AA		 1319
1320 READ_BUF(16);
1321 COPYMEM(&sess->clientid, 8);
1322 READ32(sess->seqid);
1323 READ32(sess->flags);
1324
1325 /* Fore channel attrs */
1326 READ_BUF(28);
1327 READ32(dummy); /* headerpadsz is always 0 */
1328 READ32(sess->fore_channel.maxreq_sz);
1329 READ32(sess->fore_channel.maxresp_sz);
1330 READ32(sess->fore_channel.maxresp_cached);
1331 READ32(sess->fore_channel.maxops);
1332 READ32(sess->fore_channel.maxreqs);
1333 READ32(sess->fore_channel.nr_rdma_attrs);
1334 if (sess->fore_channel.nr_rdma_attrs == 1) {
1335 READ_BUF(4);
1336 READ32(sess->fore_channel.rdma_attrs);
1337 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1338 dprintk("Too many fore channel attr bitmaps!\n");
1339 goto xdr_error;
1340 }
1341
1342 /* Back channel attrs */
1343 READ_BUF(28);
1344 READ32(dummy); /* headerpadsz is always 0 */
1345 READ32(sess->back_channel.maxreq_sz);
1346 READ32(sess->back_channel.maxresp_sz);
1347 READ32(sess->back_channel.maxresp_cached);
1348 READ32(sess->back_channel.maxops);
1349 READ32(sess->back_channel.maxreqs);
1350 READ32(sess->back_channel.nr_rdma_attrs);
1351 if (sess->back_channel.nr_rdma_attrs == 1) {
1352 READ_BUF(4);
1353 READ32(sess->back_channel.rdma_attrs);
1354 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1355 dprintk("Too many back channel attr bitmaps!\n");
1356 goto xdr_error;
1357 }
1358
acb2887e 1359 READ_BUF(4);
ec6b5d7b 1360 READ32(sess->callback_prog);
acb2887e 1361 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1362 DECODE_TAIL;
2db134eb
AA		 1363}
1364
1365static __be32
1366nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1367 struct nfsd4_destroy_session *destroy_session)
1368{
e10e0cfc
BH		 1369 DECODE_HEAD;
1370 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1371 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1372
1373 DECODE_TAIL;
2db134eb
AA		 1374}
1375
e1ca12df
BS		 1376static __be32
1377nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1378 struct nfsd4_free_stateid *free_stateid)
1379{
1380 DECODE_HEAD;
1381
1382 READ_BUF(sizeof(stateid_t));
1383 READ32(free_stateid->fr_stateid.si_generation);
1384 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1385
1386 DECODE_TAIL;
1387}
1388
2db134eb
AA		 1389static __be32
1390nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1391 struct nfsd4_sequence *seq)
1392{
b85d4c01
BH		 1393 DECODE_HEAD;
1394
1395 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1396 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1397 READ32(seq->seqid);
1398 READ32(seq->slotid);
1399 READ32(seq->maxslots);
1400 READ32(seq->cachethis);
1401
1402 DECODE_TAIL;
2db134eb
AA		 1403}
1404
17456804
BS		 1405static __be32
1406nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1407{
17456804 1408 int i;
03cfb420
BS		 1409 __be32 *p, status;
1410 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1411
1412 READ_BUF(4);
1413 test_stateid->ts_num_ids = ntohl(*p++);
1414
03cfb420 1415 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1416
1417 for (i = 0; i < test_stateid->ts_num_ids; i++) {
03cfb420
BS		 1418 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1419 if (!stateid) {
afcf6792 1420 status = nfserrno(-ENOMEM);
03cfb420
BS		 1421 goto out;
1422 }
1423
1424 defer_free(argp, kfree, stateid);
1425 INIT_LIST_HEAD(&stateid->ts_id_list);
1426 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1427
1428 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1429 if (status)
03cfb420 1430 goto out;
17456804
BS		 1431 }
1432
1433 status = 0;
1434out:
1435 return status;
1436xdr_error:
1437 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1438 status = nfserr_bad_xdr;
1439 goto out;
1440}
1441
345c2842
MJ		 1442static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1443{
1444 DECODE_HEAD;
1445
1446 READ_BUF(8);
1447 COPYMEM(&dc->clientid, 8);
1448
1449 DECODE_TAIL;
1450}
1451
4dc6ec00
BF		 1452static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1453{
1454 DECODE_HEAD;
1455
1456 READ_BUF(4);
1457 READ32(rc->rca_one_fs);
1458
1459 DECODE_TAIL;
1460}
1461
347e0ad9
BH		 1462static __be32
1463nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1464{
1465 return nfs_ok;
1466}
1467
3c375c6f
BH		 1468static __be32
1469nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1470{
1e685ec2 1471 return nfserr_notsupp;
3c375c6f
BH		 1472}
1473
347e0ad9
BH		 1474typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1475
1476static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1477 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1478 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1479 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1480 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1481 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1482 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1483 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1484 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1485 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1486 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1487 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1488 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1489 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1490 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1491 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1492 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1493 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1494 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1495 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1496 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
a1c8c4d1 1497 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
ad1060c8
BF		 1498 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1499 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1500 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1501 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1502 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1503 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1504 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1505 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1506 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1507 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1508 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1509 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1510 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1511 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1512 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1513 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
347e0ad9
BH		 1514};
1515
2db134eb 1516static nfsd4_dec nfsd41_dec_ops[] = {
9064caae
RD		 1517 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1518 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1519 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1520 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1521 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1522 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1523 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1524 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1525 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1526 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1527 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1528 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1529 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1530 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1531 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1532 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1533 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1534 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1535 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1536 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1537 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1538 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1539 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1540 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1541 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1542 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1543 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1544 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1545 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1546 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1547 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1548 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1549 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1550 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1551 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1552 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1553 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
2db134eb
AA		 1554
1555 /* new operations for NFSv4.1 */
cb73a9f4 1556 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1557 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1558 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1559 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1560 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1561 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1562 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1563 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1564 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1565 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1566 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1567 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1568 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1569 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1570 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1571 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1572 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1573 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1574 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1575};
1576
f2feb96b
BH		 1577struct nfsd4_minorversion_ops {
1578 nfsd4_dec *decoders;
1579 int nops;
1580};
1581
1582static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
ad1060c8 1583 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
2db134eb 1584 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
f2feb96b
BH		 1585};
1586
b37ad28b 1587static __be32
1da177e4
LT		 1588nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1589{
1590 DECODE_HEAD;
1591 struct nfsd4_op *op;
f2feb96b 1592 struct nfsd4_minorversion_ops *ops;
1091006c 1593 bool cachethis = false;
1da177e4
LT		 1594 int i;
1595
1da177e4
LT		 1596 READ_BUF(4);
1597 READ32(argp->taglen);
1598 READ_BUF(argp->taglen + 8);
1599 SAVEMEM(argp->tag, argp->taglen);
1600 READ32(argp->minorversion);
1601 READ32(argp->opcnt);
1602
1603 if (argp->taglen > NFSD4_MAX_TAGLEN)
1604 goto xdr_error;
1605 if (argp->opcnt > 100)
1606 goto xdr_error;
1607
e8c96f8c 1608 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1609 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1610 if (!argp->ops) {
1611 argp->ops = argp->iops;
817cb9d4 1612 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1613 goto xdr_error;
1614 }
1615 }
1616
f2feb96b 1617 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
30cff1ff
BH		 1618 argp->opcnt = 0;
1619
f2feb96b 1620 ops = &nfsd4_minorversion[argp->minorversion];
1da177e4
LT		 1621 for (i = 0; i < argp->opcnt; i++) {
1622 op = &argp->ops[i];
1623 op->replay = NULL;
1624
8a61b18c
BF		 1625 READ_BUF(4);
1626 READ32(op->opnum);
1da177e4 1627
de3cab79 1628 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
f2feb96b 1629 op->status = ops->decoders[op->opnum](argp, &op->u);
347e0ad9 1630 else {
1da177e4
LT		 1631 op->opnum = OP_ILLEGAL;
1632 op->status = nfserr_op_illegal;
1da177e4
LT		 1633 }
1634
1635 if (op->status) {
1636 argp->opcnt = i+1;
1637 break;
1638 }
1091006c
BF		 1639 /*
1640 * We'll try to cache the result in the DRC if any one
1641 * op in the compound wants to be cached:
1642 */
1643 cachethis |= nfsd4_cache_this_op(op);
1da177e4 1644 }
1091006c
BF		 1645 /* Sessions make the DRC unnecessary: */
1646 if (argp->minorversion)
1647 cachethis = false;
1648 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4
LT		 1649
1650 DECODE_TAIL;
1651}
1da177e4 1652
1da177e4
LT		 1653#define WRITE32(n) *p++ = htonl(n)
1654#define WRITE64(n) do { \
1655 *p++ = htonl((u32)((n) >> 32)); \
1656 *p++ = htonl((u32)(n)); \
1657} while (0)
5108b276 1658#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1659 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1660 memcpy(p, ptr, nbytes); \
1661 p += XDR_QUADLEN(nbytes); \
5108b276 1662}} while (0)
c654b8a9
BF		 1663
1664static void write32(__be32 **p, u32 n)
1665{
45eaa1c1 1666 *(*p)++ = htonl(n);
c654b8a9
BF		 1667}
1668
1669static void write64(__be32 **p, u64 n)
1670{
45eaa1c1 1671 write32(p, (n >> 32));
c654b8a9
BF		 1672 write32(p, (u32)n);
1673}
1674
1675static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1676{
1677 if (IS_I_VERSION(inode)) {
1678 write64(p, inode->i_version);
1679 } else {
1680 write32(p, stat->ctime.tv_sec);
1681 write32(p, stat->ctime.tv_nsec);
1682 }
1683}
1684
1685static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1686{
1687 write32(p, c->atomic);
1688 if (c->change_supported) {
1689 write64(p, c->before_change);
1690 write64(p, c->after_change);
1691 } else {
1692 write32(p, c->before_ctime_sec);
1693 write32(p, c->before_ctime_nsec);
1694 write32(p, c->after_ctime_sec);
1695 write32(p, c->after_ctime_nsec);
1696 }
1697}
1da177e4
LT		 1698
1699#define RESERVE_SPACE(nbytes) do { \
1700 p = resp->p; \
1701 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1702} while (0)
1703#define ADJUST_ARGS() resp->p = p
1704
1705/*
1706 * Header routine to setup seqid operation replay cache
1707 */
1708#define ENCODE_SEQID_OP_HEAD \
2ebbc012 1709 __be32 *save; \
1da177e4
LT		 1710 \
1711 save = resp->p;
1712
1713/*
7fb64cee
N		 1714 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1715 * is where sequence id's are incremented, and the replay cache is filled.
1716 * Note that we increment sequence id's here, at the last moment, so we're sure
1717 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1718 */
1719
f3e42237
BF		 1720static void encode_seqid_op_tail(struct nfsd4_compoundres *resp, __be32 *save, __be32 nfserr)
1721{
1722 struct nfs4_stateowner *stateowner = resp->cstate.replay_owner;
1723
1724 if (seqid_mutating_err(ntohl(nfserr)) && stateowner) {
1725 stateowner->so_seqid++;
1726 stateowner->so_replay.rp_status = nfserr;
1727 stateowner->so_replay.rp_buflen =
1728 (char *)resp->p - (char *)save;
1729 memcpy(stateowner->so_replay.rp_buf, save,
1730 stateowner->so_replay.rp_buflen);
38c387b5 1731 nfsd4_purge_closed_stateid(stateowner);
f3e42237
BF		 1732 }
1733}
1da177e4 1734
81c3f413 1735/* Encode as an array of strings the string given with components
e7a0444a 1736 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1737 */
e7a0444a
WAA		 1738static __be32 nfsd4_encode_components_esc(char sep, char *components,
1739 __be32 **pp, int *buflen,
1740 char esc_enter, char esc_exit)
81c3f413 1741{
2ebbc012
AV		 1742 __be32 *p = *pp;
1743 __be32 *countp = p;
81c3f413 1744 int strlen, count=0;
e7a0444a 1745 char *str, *end, *next;
81c3f413
BF		 1746
1747 dprintk("nfsd4_encode_components(%s)\n", components);
1748 if ((*buflen -= 4) < 0)
1749 return nfserr_resource;
1750 WRITE32(0); /* We will fill this in with @count later */
1751 end = str = components;
1752 while (*end) {
e7a0444a
WAA		 1753 bool found_esc = false;
1754
1755 /* try to parse as esc_start, ..., esc_end, sep */
1756 if (*str == esc_enter) {
1757 for (; *end && (*end != esc_exit); end++)
1758 /* find esc_exit or end of string */;
1759 next = end + 1;
1760 if (*end && (!*next || *next == sep)) {
1761 str++;
1762 found_esc = true;
1763 }
1764 }
1765
1766 if (!found_esc)
1767 for (; *end && (*end != sep); end++)
1768 /* find sep or end of string */;
1769
81c3f413
BF		 1770 strlen = end - str;
1771 if (strlen) {
1772 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1773 return nfserr_resource;
1774 WRITE32(strlen);
1775 WRITEMEM(str, strlen);
1776 count++;
1777 }
1778 else
1779 end++;
1780 str = end;
1781 }
1782 *pp = p;
1783 p = countp;
1784 WRITE32(count);
1785 return 0;
1786}
1787
e7a0444a
WAA		 1788/* Encode as an array of strings the string given with components
1789 * separated @sep.
1790 */
1791static __be32 nfsd4_encode_components(char sep, char *components,
1792 __be32 **pp, int *buflen)
1793{
1794 return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
1795}
1796
81c3f413
BF		 1797/*
1798 * encode a location element of a fs_locations structure
1799 */
b37ad28b 1800static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1801 __be32 **pp, int *buflen)
81c3f413 1802{
b37ad28b 1803 __be32 status;
2ebbc012 1804 __be32 *p = *pp;
81c3f413 1805
e7a0444a
WAA		 1806 status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
1807 '[', ']');
81c3f413
BF		 1808 if (status)
1809 return status;
1810 status = nfsd4_encode_components('/', location->path, &p, buflen);
1811 if (status)
1812 return status;
1813 *pp = p;
1814 return 0;
1815}
1816
1817/*
ed748aac 1818 * Encode a path in RFC3530 'pathname4' format
81c3f413 1819 */
ed748aac
TM		 1820static __be32 nfsd4_encode_path(const struct path *root,
1821 const struct path *path, __be32 **pp, int *buflen)
81c3f413 1822{
ed748aac
TM		 1823 struct path cur = {
1824 .mnt = path->mnt,
1825 .dentry = path->dentry,
1826 };
1827 __be32 *p = *pp;
1828 struct dentry **components = NULL;
1829 unsigned int ncomponents = 0;
1830 __be32 err = nfserr_jukebox;
81c3f413 1831
ed748aac 1832 dprintk("nfsd4_encode_components(");
81c3f413 1833
ed748aac
TM		 1834 path_get(&cur);
1835 /* First walk the path up to the nfsd root, and store the
1836 * dentries/path components in an array.
1837 */
1838 for (;;) {
1839 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1840 break;
1841 if (cur.dentry == cur.mnt->mnt_root) {
1842 if (follow_up(&cur))
1843 continue;
1844 goto out_free;
1845 }
1846 if ((ncomponents & 15) == 0) {
1847 struct dentry **new;
1848 new = krealloc(components,
1849 sizeof(*new) * (ncomponents + 16),
1850 GFP_KERNEL);
1851 if (!new)
1852 goto out_free;
1853 components = new;
1854 }
1855 components[ncomponents++] = cur.dentry;
1856 cur.dentry = dget_parent(cur.dentry);
1857 }
81c3f413 1858
ed748aac
TM		 1859 *buflen -= 4;
1860 if (*buflen < 0)
1861 goto out_free;
1862 WRITE32(ncomponents);
1863
1864 while (ncomponents) {
1865 struct dentry *dentry = components[ncomponents - 1];
1866 unsigned int len = dentry->d_name.len;
1867
1868 *buflen -= 4 + (XDR_QUADLEN(len) << 2);
1869 if (*buflen < 0)
1870 goto out_free;
1871 WRITE32(len);
1872 WRITEMEM(dentry->d_name.name, len);
1873 dprintk("/%s", dentry->d_name.name);
1874 dput(dentry);
1875 ncomponents--;
81c3f413 1876 }
ed748aac
TM		 1877
1878 *pp = p;
1879 err = 0;
1880out_free:
1881 dprintk(")\n");
1882 while (ncomponents)
1883 dput(components[--ncomponents]);
1884 kfree(components);
1885 path_put(&cur);
1886 return err;
1887}
1888
1889static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
1890 const struct path *path, __be32 **pp, int *buflen)
1891{
1892 struct svc_export *exp_ps;
1893 __be32 res;
1894
1895 exp_ps = rqst_find_fsidzero_export(rqstp);
1896 if (IS_ERR(exp_ps))
1897 return nfserrno(PTR_ERR(exp_ps));
1898 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
1899 exp_put(exp_ps);
1900 return res;
81c3f413
BF		 1901}
1902
1903/*
1904 * encode a fs_locations structure
1905 */
b37ad28b 1906static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1907 struct svc_export *exp,
2ebbc012 1908 __be32 **pp, int *buflen)
81c3f413 1909{
b37ad28b 1910 __be32 status;
cc45f017 1911 int i;
2ebbc012 1912 __be32 *p = *pp;
81c3f413 1913 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1914
ed748aac 1915 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
81c3f413
BF		 1916 if (status)
1917 return status;
1918 if ((*buflen -= 4) < 0)
1919 return nfserr_resource;
1920 WRITE32(fslocs->locations_count);
1921 for (i=0; i<fslocs->locations_count; i++) {
1922 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1923 &p, buflen);
1924 if (status)
1925 return status;
1926 }
1927 *pp = p;
1928 return 0;
1929}
1da177e4 1930
3d2544b1
BF		 1931static u32 nfs4_file_type(umode_t mode)
1932{
1933 switch (mode & S_IFMT) {
1934 case S_IFIFO: return NF4FIFO;
1935 case S_IFCHR: return NF4CHR;
1936 case S_IFDIR: return NF4DIR;
1937 case S_IFBLK: return NF4BLK;
1938 case S_IFLNK: return NF4LNK;
1939 case S_IFREG: return NF4REG;
1940 case S_IFSOCK: return NF4SOCK;
1941 default: return NF4BAD;
1942 };
1943}
1da177e4 1944
b37ad28b 1945static __be32
1da177e4 1946nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1947 __be32 **p, int *buflen)
1da177e4
LT		 1948{
1949 int status;
1950
1951 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1952 return nfserr_resource;
1953 if (whotype != NFS4_ACL_WHO_NAMED)
1954 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1955 else if (group)
1956 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1957 else
1958 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1959 if (status < 0)
1960 return nfserrno(status);
1961 *p = xdr_encode_opaque(*p, NULL, status);
1962 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1963 BUG_ON(*buflen < 0);
1964 return 0;
1965}
1966
b37ad28b 1967static inline __be32
2ebbc012 1968nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1da177e4
LT		 1969{
1970 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1971}
1972
b37ad28b 1973static inline __be32
2ebbc012 1974nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1da177e4
LT		 1975{
1976 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1977}
1978
b37ad28b 1979static inline __be32
1da177e4 1980nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1981 __be32 **p, int *buflen)
1da177e4
LT		 1982{
1983 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1984}
1985
42ca0993
BF		 1986#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1987 FATTR4_WORD0_RDATTR_ERROR)
1988#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1989
b37ad28b 1990static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1991{
1992 /* As per referral draft: */
1993 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1994 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1995 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1996 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1997 *rdattr_err = NFSERR_MOVED;
1998 else
1999 return nfserr_moved;
2000 }
2001 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2002 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2003 return 0;
2004}
1da177e4 2005
ae7095a7
BF		 2006
2007static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2008{
2009 struct path path = exp->ex_path;
2010 int err;
2011
2012 path_get(&path);
2013 while (follow_up(&path)) {
2014 if (path.dentry != path.mnt->mnt_root)
2015 break;
2016 }
2017 err = vfs_getattr(path.mnt, path.dentry, stat);
2018 path_put(&path);
2019 return err;
2020}
2021
1da177e4
LT		 2022/*
2023 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2024 * ourselves.
2025 *
2026 * @countp is the buffer size in _words_; upon successful return this becomes
2027 * replaced with the number of words written.
2028 */
b37ad28b 2029__be32
1da177e4 2030nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2ebbc012 2031 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
406a7ea9 2032 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2033{
2034 u32 bmval0 = bmval[0];
2035 u32 bmval1 = bmval[1];
7e705706 2036 u32 bmval2 = bmval[2];
1da177e4
LT		 2037 struct kstat stat;
2038 struct svc_fh tempfh;
2039 struct kstatfs statfs;
2040 int buflen = *countp << 2;
2ebbc012 2041 __be32 *attrlenp;
1da177e4
LT		 2042 u32 dummy;
2043 u64 dummy64;
42ca0993 2044 u32 rdattr_err = 0;
2ebbc012 2045 __be32 *p = buffer;
b37ad28b 2046 __be32 status;
b8dd7b9a 2047 int err;
1da177e4
LT		 2048 int aclsupport = 0;
2049 struct nfs4_acl *acl = NULL;
7e705706
AA		 2050 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2051 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2052 struct path path = {
2053 .mnt = exp->ex_path.mnt,
2054 .dentry = dentry,
2055 };
3d733711 2056 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2057
2058 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2059 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2060 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2061 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2062
42ca0993 2063 if (exp->ex_fslocs.migrated) {
7e705706 2064 BUG_ON(bmval[2]);
42ca0993
BF		 2065 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2066 if (status)
2067 goto out;
2068 }
2069
54775491 2070 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
b8dd7b9a 2071 if (err)
1da177e4 2072 goto out_nfserr;
a16e92ed
BF		 2073 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2074 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2075 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2076 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2077 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2078 if (err)
1da177e4
LT		 2079 goto out_nfserr;
2080 }
2081 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2082 fh_init(&tempfh, NFS4_FHSIZE);
2083 status = fh_compose(&tempfh, exp, dentry, NULL);
2084 if (status)
2085 goto out;
2086 fhp = &tempfh;
2087 }
2088 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2089 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2090 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2091 aclsupport = (err == 0);
1da177e4 2092 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2093 if (err == -EOPNOTSUPP)
1da177e4 2094 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2095 else if (err == -EINVAL) {
1da177e4
LT		 2096 status = nfserr_attrnotsupp;
2097 goto out;
b8dd7b9a 2098 } else if (err != 0)
1da177e4
LT		 2099 goto out_nfserr;
2100 }
2101 }
1da177e4 2102
2b44f1ba
BH		 2103 if (bmval2) {
2104 if ((buflen -= 16) < 0)
2105 goto out_resource;
7e705706
AA		 2106 WRITE32(3);
2107 WRITE32(bmval0);
2108 WRITE32(bmval1);
2109 WRITE32(bmval2);
2b44f1ba
BH		 2110 } else if (bmval1) {
2111 if ((buflen -= 12) < 0)
2112 goto out_resource;
7e705706
AA		 2113 WRITE32(2);
2114 WRITE32(bmval0);
2115 WRITE32(bmval1);
2116 } else {
2b44f1ba
BH		 2117 if ((buflen -= 8) < 0)
2118 goto out_resource;
7e705706
AA		 2119 WRITE32(1);
2120 WRITE32(bmval0);
2121 }
1da177e4
LT		 2122 attrlenp = p++; /* to be backfilled later */
2123
2124 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2125 u32 word0 = nfsd_suppattrs0(minorversion);
2126 u32 word1 = nfsd_suppattrs1(minorversion);
2127 u32 word2 = nfsd_suppattrs2(minorversion);
2128
42ca0993
BF		 2129 if (!aclsupport)
2130 word0 &= ~FATTR4_WORD0_ACL;
7e705706 2131 if (!word2) {
2b44f1ba
BH		 2132 if ((buflen -= 12) < 0)
2133 goto out_resource;
7e705706
AA		 2134 WRITE32(2);
2135 WRITE32(word0);
2136 WRITE32(word1);
2137 } else {
2b44f1ba
BH		 2138 if ((buflen -= 16) < 0)
2139 goto out_resource;
7e705706
AA		 2140 WRITE32(3);
2141 WRITE32(word0);
2142 WRITE32(word1);
2143 WRITE32(word2);
2144 }
1da177e4
LT		 2145 }
2146 if (bmval0 & FATTR4_WORD0_TYPE) {
2147 if ((buflen -= 4) < 0)
2148 goto out_resource;
3d2544b1 2149 dummy = nfs4_file_type(stat.mode);
1da177e4
LT		 2150 if (dummy == NF4BAD)
2151 goto out_serverfault;
2152 WRITE32(dummy);
2153 }
2154 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2155 if ((buflen -= 4) < 0)
2156 goto out_resource;
49640001 2157 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 2158 WRITE32(NFS4_FH_PERSISTENT);
49640001 2159 else
e34ac862 2160 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 2161 }
2162 if (bmval0 & FATTR4_WORD0_CHANGE) {
1da177e4
LT		 2163 if ((buflen -= 8) < 0)
2164 goto out_resource;
c654b8a9 2165 write_change(&p, &stat, dentry->d_inode);
1da177e4
LT		 2166 }
2167 if (bmval0 & FATTR4_WORD0_SIZE) {
2168 if ((buflen -= 8) < 0)
2169 goto out_resource;
2170 WRITE64(stat.size);
2171 }
2172 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2173 if ((buflen -= 4) < 0)
2174 goto out_resource;
2175 WRITE32(1);
2176 }
2177 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2178 if ((buflen -= 4) < 0)
2179 goto out_resource;
2180 WRITE32(1);
2181 }
2182 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2183 if ((buflen -= 4) < 0)
2184 goto out_resource;
2185 WRITE32(0);
2186 }
2187 if (bmval0 & FATTR4_WORD0_FSID) {
2188 if ((buflen -= 16) < 0)
2189 goto out_resource;
42ca0993
BF		 2190 if (exp->ex_fslocs.migrated) {
2191 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2192 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2193 } else switch(fsid_source(fhp)) {
2194 case FSIDSOURCE_FSID:
1da177e4
LT		 2195 WRITE64((u64)exp->ex_fsid);
2196 WRITE64((u64)0);
af6a4e28
N		 2197 break;
2198 case FSIDSOURCE_DEV:
1da177e4
LT		 2199 WRITE32(0);
2200 WRITE32(MAJOR(stat.dev));
2201 WRITE32(0);
2202 WRITE32(MINOR(stat.dev));
af6a4e28
N		 2203 break;
2204 case FSIDSOURCE_UUID:
2205 WRITEMEM(exp->ex_uuid, 16);
2206 break;
1da177e4
LT		 2207 }
2208 }
2209 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2210 if ((buflen -= 4) < 0)
2211 goto out_resource;
2212 WRITE32(0);
2213 }
2214 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2215 if ((buflen -= 4) < 0)
2216 goto out_resource;
3d733711 2217 WRITE32(nn->nfsd4_lease);
1da177e4
LT		 2218 }
2219 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2220 if ((buflen -= 4) < 0)
2221 goto out_resource;
42ca0993 2222 WRITE32(rdattr_err);
1da177e4
LT		 2223 }
2224 if (bmval0 & FATTR4_WORD0_ACL) {
2225 struct nfs4_ace *ace;
1da177e4
LT		 2226
2227 if (acl == NULL) {
2228 if ((buflen -= 4) < 0)
2229 goto out_resource;
2230
2231 WRITE32(0);
2232 goto out_acl;
2233 }
2234 if ((buflen -= 4) < 0)
2235 goto out_resource;
2236 WRITE32(acl->naces);
2237
28e05dd8 2238 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 2239 if ((buflen -= 4*3) < 0)
2240 goto out_resource;
2241 WRITE32(ace->type);
2242 WRITE32(ace->flag);
2243 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
2244 status = nfsd4_encode_aclname(rqstp, ace->whotype,
2245 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
2246 &p, &buflen);
2247 if (status == nfserr_resource)
2248 goto out_resource;
2249 if (status)
2250 goto out;
2251 }
2252 }
2253out_acl:
2254 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2255 if ((buflen -= 4) < 0)
2256 goto out_resource;
2257 WRITE32(aclsupport ?
2258 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2259 }
2260 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2261 if ((buflen -= 4) < 0)
2262 goto out_resource;
2263 WRITE32(1);
2264 }
2265 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2266 if ((buflen -= 4) < 0)
2267 goto out_resource;
2930d381 2268 WRITE32(0);
1da177e4
LT		 2269 }
2270 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2271 if ((buflen -= 4) < 0)
2272 goto out_resource;
2273 WRITE32(1);
2274 }
2275 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2276 if ((buflen -= 4) < 0)
2277 goto out_resource;
2278 WRITE32(1);
2279 }
2280 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2281 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2282 if (buflen < 0)
2283 goto out_resource;
2284 WRITE32(fhp->fh_handle.fh_size);
2285 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2286 }
2287 if (bmval0 & FATTR4_WORD0_FILEID) {
2288 if ((buflen -= 8) < 0)
2289 goto out_resource;
40ee5dc6 2290 WRITE64(stat.ino);
1da177e4
LT		 2291 }
2292 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2293 if ((buflen -= 8) < 0)
2294 goto out_resource;
2295 WRITE64((u64) statfs.f_ffree);
2296 }
2297 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2298 if ((buflen -= 8) < 0)
2299 goto out_resource;
2300 WRITE64((u64) statfs.f_ffree);
2301 }
2302 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2303 if ((buflen -= 8) < 0)
2304 goto out_resource;
2305 WRITE64((u64) statfs.f_files);
2306 }
81c3f413
BF		 2307 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2308 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2309 if (status == nfserr_resource)
2310 goto out_resource;
2311 if (status)
2312 goto out;
2313 }
1da177e4
LT		 2314 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2315 if ((buflen -= 4) < 0)
2316 goto out_resource;
2317 WRITE32(1);
2318 }
2319 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2320 if ((buflen -= 8) < 0)
2321 goto out_resource;
2322 WRITE64(~(u64)0);
2323 }
2324 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2325 if ((buflen -= 4) < 0)
2326 goto out_resource;
2327 WRITE32(255);
2328 }
2329 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2330 if ((buflen -= 4) < 0)
2331 goto out_resource;
a16e92ed 2332 WRITE32(statfs.f_namelen);
1da177e4
LT		 2333 }
2334 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2335 if ((buflen -= 8) < 0)
2336 goto out_resource;
7adae489 2337 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2338 }
2339 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2340 if ((buflen -= 8) < 0)
2341 goto out_resource;
7adae489 2342 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2343 }
2344 if (bmval1 & FATTR4_WORD1_MODE) {
2345 if ((buflen -= 4) < 0)
2346 goto out_resource;
2347 WRITE32(stat.mode & S_IALLUGO);
2348 }
2349 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2350 if ((buflen -= 4) < 0)
2351 goto out_resource;
2352 WRITE32(1);
2353 }
2354 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2355 if ((buflen -= 4) < 0)
2356 goto out_resource;
2357 WRITE32(stat.nlink);
2358 }
2359 if (bmval1 & FATTR4_WORD1_OWNER) {
2360 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2361 if (status == nfserr_resource)
2362 goto out_resource;
2363 if (status)
2364 goto out;
2365 }
2366 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2367 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2368 if (status == nfserr_resource)
2369 goto out_resource;
2370 if (status)
2371 goto out;
2372 }
2373 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2374 if ((buflen -= 8) < 0)
2375 goto out_resource;
2376 WRITE32((u32) MAJOR(stat.rdev));
2377 WRITE32((u32) MINOR(stat.rdev));
2378 }
2379 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2380 if ((buflen -= 8) < 0)
2381 goto out_resource;
2382 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2383 WRITE64(dummy64);
2384 }
2385 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2386 if ((buflen -= 8) < 0)
2387 goto out_resource;
2388 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2389 WRITE64(dummy64);
2390 }
2391 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2392 if ((buflen -= 8) < 0)
2393 goto out_resource;
2394 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2395 WRITE64(dummy64);
2396 }
2397 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2398 if ((buflen -= 8) < 0)
2399 goto out_resource;
2400 dummy64 = (u64)stat.blocks << 9;
2401 WRITE64(dummy64);
2402 }
2403 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2404 if ((buflen -= 12) < 0)
2405 goto out_resource;
2406 WRITE32(0);
2407 WRITE32(stat.atime.tv_sec);
2408 WRITE32(stat.atime.tv_nsec);
2409 }
2410 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2411 if ((buflen -= 12) < 0)
2412 goto out_resource;
2413 WRITE32(0);
2414 WRITE32(1);
2415 WRITE32(0);
2416 }
2417 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2418 if ((buflen -= 12) < 0)
2419 goto out_resource;
2420 WRITE32(0);
2421 WRITE32(stat.ctime.tv_sec);
2422 WRITE32(stat.ctime.tv_nsec);
2423 }
2424 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2425 if ((buflen -= 12) < 0)
2426 goto out_resource;
2427 WRITE32(0);
2428 WRITE32(stat.mtime.tv_sec);
2429 WRITE32(stat.mtime.tv_nsec);
2430 }
2431 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 2432 if ((buflen -= 8) < 0)
2433 goto out_resource;
406a7ea9
FF		 2434 /*
2435 * Get parent's attributes if not ignoring crossmount
2436 * and this is the root of a cross-mounted filesystem.
2437 */
2438 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2439 dentry == exp->ex_path.mnt->mnt_root)
2440 get_parent_attributes(exp, &stat);
40ee5dc6 2441 WRITE64(stat.ino);
1da177e4 2442 }
8c18f205
BH		 2443 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2444 WRITE32(3);
2445 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2446 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2447 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2448 }
7e705706 2449
1da177e4
LT		 2450 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2451 *countp = p - buffer;
2452 status = nfs_ok;
2453
2454out:
28e05dd8 2455 kfree(acl);
1da177e4
LT		 2456 if (fhp == &tempfh)
2457 fh_put(&tempfh);
2458 return status;
2459out_nfserr:
b8dd7b9a 2460 status = nfserrno(err);
1da177e4
LT		 2461 goto out;
2462out_resource:
2463 *countp = 0;
2464 status = nfserr_resource;
2465 goto out;
2466out_serverfault:
2467 status = nfserr_serverfault;
2468 goto out;
2469}
2470
c0ce6ec8
BF		 2471static inline int attributes_need_mount(u32 *bmval)
2472{
2473 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2474 return 1;
2475 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2476 return 1;
2477 return 0;
2478}
2479
b37ad28b 2480static __be32
1da177e4 2481nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2ebbc012 2482 const char *name, int namlen, __be32 *p, int *buflen)
1da177e4
LT		 2483{
2484 struct svc_export *exp = cd->rd_fhp->fh_export;
2485 struct dentry *dentry;
b37ad28b 2486 __be32 nfserr;
406a7ea9 2487 int ignore_crossmnt = 0;
1da177e4
LT		 2488
2489 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2490 if (IS_ERR(dentry))
2491 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2492 if (!dentry->d_inode) {
2493 /*
2494 * nfsd_buffered_readdir drops the i_mutex between
2495 * readdir and calling this callback, leaving a window
2496 * where this directory entry could have gone away.
2497 */
2498 dput(dentry);
2499 return nfserr_noent;
2500 }
1da177e4
LT		 2501
2502 exp_get(exp);
406a7ea9
FF		 2503 /*
2504 * In the case of a mountpoint, the client may be asking for
2505 * attributes that are only properties of the underlying filesystem
2506 * as opposed to the cross-mounted file system. In such a case,
2507 * we will not follow the cross mount and will fill the attribtutes
2508 * directly from the mountpoint dentry.
2509 */
3227fa41 2510 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2511 int err;
2512
3227fa41
BF		 2513 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2514 && !attributes_need_mount(cd->rd_bmval)) {
2515 ignore_crossmnt = 1;
2516 goto out_encode;
2517 }
dcb488a3
AA		 2518 /*
2519 * Why the heck aren't we just using nfsd_lookup??
2520 * Different "."/".." handling? Something else?
2521 * At least, add a comment here to explain....
2522 */
021d3a72
BF		 2523 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2524 if (err) {
2525 nfserr = nfserrno(err);
1da177e4
LT		 2526 goto out_put;
2527 }
dcb488a3
AA		 2528 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2529 if (nfserr)
2530 goto out_put;
1da177e4
LT		 2531
2532 }
3227fa41 2533out_encode:
1da177e4 2534 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 2535 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2536out_put:
2537 dput(dentry);
2538 exp_put(exp);
2539 return nfserr;
2540}
2541
2ebbc012 2542static __be32 *
b37ad28b 2543nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2544{
2ebbc012 2545 __be32 *attrlenp;
1da177e4
LT		 2546
2547 if (buflen < 6)
2548 return NULL;
2549 *p++ = htonl(2);
2550 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2551 *p++ = htonl(0); /* bmval1 */
2552
2553 attrlenp = p++;
2554 *p++ = nfserr; /* no htonl */
2555 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2556 return p;
2557}
2558
2559static int
a0ad13ef
N		 2560nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2561 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2562{
a0ad13ef 2563 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2564 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2565 int buflen;
2ebbc012 2566 __be32 *p = cd->buffer;
b2c0cea6 2567 __be32 *cookiep;
b37ad28b 2568 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2569
2570 /* In nfsv4, "." and ".." never make it onto the wire.. */
2571 if (name && isdotent(name, namlen)) {
2572 cd->common.err = nfs_ok;
2573 return 0;
2574 }
2575
2576 if (cd->offset)
2577 xdr_encode_hyper(cd->offset, (u64) offset);
2578
2579 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2580 if (buflen < 0)
2581 goto fail;
2582
2583 *p++ = xdr_one; /* mark entry present */
b2c0cea6 2584 cookiep = p;
1da177e4
LT		 2585 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2586 p = xdr_encode_array(p, name, namlen); /* name length & name */
2587
2588 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2589 switch (nfserr) {
2590 case nfs_ok:
2591 p += buflen;
2592 break;
2593 case nfserr_resource:
2594 nfserr = nfserr_toosmall;
2595 goto fail;
b2c0cea6
BF		 2596 case nfserr_noent:
2597 goto skip_entry;
1da177e4
LT		 2598 default:
2599 /*
2600 * If the client requested the RDATTR_ERROR attribute,
2601 * we stuff the error code into this attribute
2602 * and continue. If this attribute was not requested,
2603 * then in accordance with the spec, we fail the
2604 * entire READDIR operation(!)
2605 */
2606 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2607 goto fail;
1da177e4 2608 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2609 if (p == NULL) {
2610 nfserr = nfserr_toosmall;
1da177e4 2611 goto fail;
34081efc 2612 }
1da177e4
LT		 2613 }
2614 cd->buflen -= (p - cd->buffer);
2615 cd->buffer = p;
b2c0cea6
BF		 2616 cd->offset = cookiep;
2617skip_entry:
1da177e4
LT		 2618 cd->common.err = nfs_ok;
2619 return 0;
2620fail:
2621 cd->common.err = nfserr;
2622 return -EINVAL;
2623}
2624
e2f282b9
BH		 2625static void
2626nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2627{
bc749ca4 2628 __be32 *p;
e2f282b9
BH		 2629
2630 RESERVE_SPACE(sizeof(stateid_t));
2631 WRITE32(sid->si_generation);
2632 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2633 ADJUST_ARGS();
2634}
2635
695e12f8 2636static __be32
b37ad28b 2637nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2638{
bc749ca4 2639 __be32 *p;
1da177e4
LT		 2640
2641 if (!nfserr) {
2642 RESERVE_SPACE(8);
2643 WRITE32(access->ac_supported);
2644 WRITE32(access->ac_resp_access);
2645 ADJUST_ARGS();
2646 }
695e12f8 2647 return nfserr;
1da177e4
LT		 2648}
2649
1d1bc8f2
BF		 2650static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2651{
2652 __be32 *p;
2653
2654 if (!nfserr) {
2655 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2656 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2657 WRITE32(bcts->dir);
6e67b5d1 2658 /* Sorry, we do not yet support RDMA over 4.1: */
1d1bc8f2
BF		 2659 WRITE32(0);
2660 ADJUST_ARGS();
2661 }
2662 return nfserr;
2663}
2664
695e12f8 2665static __be32
b37ad28b 2666nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4
LT		 2667{
2668 ENCODE_SEQID_OP_HEAD;
2669
e2f282b9
BH		 2670 if (!nfserr)
2671 nfsd4_encode_stateid(resp, &close->cl_stateid);
2672
f3e42237 2673 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2674 return nfserr;
1da177e4
LT		 2675}
2676
2677
695e12f8 2678static __be32
b37ad28b 2679nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2680{
bc749ca4 2681 __be32 *p;
1da177e4
LT		 2682
2683 if (!nfserr) {
ab4684d1
CL		 2684 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
2685 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 2686 ADJUST_ARGS();
2687 }
695e12f8 2688 return nfserr;
1da177e4
LT		 2689}
2690
695e12f8 2691static __be32
b37ad28b 2692nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2693{
bc749ca4 2694 __be32 *p;
1da177e4
LT		 2695
2696 if (!nfserr) {
2697 RESERVE_SPACE(32);
c654b8a9 2698 write_cinfo(&p, &create->cr_cinfo);
1da177e4
LT		 2699 WRITE32(2);
2700 WRITE32(create->cr_bmval[0]);
2701 WRITE32(create->cr_bmval[1]);
2702 ADJUST_ARGS();
2703 }
695e12f8 2704 return nfserr;
1da177e4
LT		 2705}
2706
b37ad28b
AV		 2707static __be32
2708nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2709{
2710 struct svc_fh *fhp = getattr->ga_fhp;
2711 int buflen;
2712
2713 if (nfserr)
2714 return nfserr;
2715
2716 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2717 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2718 resp->p, &buflen, getattr->ga_bmval,
406a7ea9 2719 resp->rqstp, 0);
1da177e4
LT		 2720 if (!nfserr)
2721 resp->p += buflen;
2722 return nfserr;
2723}
2724
695e12f8
BH		 2725static __be32
2726nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2727{
695e12f8 2728 struct svc_fh *fhp = *fhpp;
1da177e4 2729 unsigned int len;
bc749ca4 2730 __be32 *p;
1da177e4
LT		 2731
2732 if (!nfserr) {
2733 len = fhp->fh_handle.fh_size;
2734 RESERVE_SPACE(len + 4);
2735 WRITE32(len);
2736 WRITEMEM(&fhp->fh_handle.fh_base, len);
2737 ADJUST_ARGS();
2738 }
695e12f8 2739 return nfserr;
1da177e4
LT		 2740}
2741
2742/*
2743* Including all fields other than the name, a LOCK4denied structure requires
2744* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2745*/
2746static void
2747nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2748{
7c13f344 2749 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2750 __be32 *p;
1da177e4 2751
7c13f344 2752 RESERVE_SPACE(32 + XDR_LEN(conf->len));
1da177e4
LT		 2753 WRITE64(ld->ld_start);
2754 WRITE64(ld->ld_length);
2755 WRITE32(ld->ld_type);
7c13f344 2756 if (conf->len) {
1da177e4 2757 WRITEMEM(&ld->ld_clientid, 8);
7c13f344
BF		 2758 WRITE32(conf->len);
2759 WRITEMEM(conf->data, conf->len);
2760 kfree(conf->data);
1da177e4
LT		 2761 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2762 WRITE64((u64)0); /* clientid */
2763 WRITE32(0); /* length of owner name */
2764 }
2765 ADJUST_ARGS();
2766}
2767
695e12f8 2768static __be32
b37ad28b 2769nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2770{
1da177e4
LT		 2771 ENCODE_SEQID_OP_HEAD;
2772
e2f282b9
BH		 2773 if (!nfserr)
2774 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2775 else if (nfserr == nfserr_denied)
1da177e4
LT		 2776 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2777
f3e42237 2778 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2779 return nfserr;
1da177e4
LT		 2780}
2781
695e12f8 2782static __be32
b37ad28b 2783nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2784{
2785 if (nfserr == nfserr_denied)
2786 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2787 return nfserr;
1da177e4
LT		 2788}
2789
695e12f8 2790static __be32
b37ad28b 2791nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4
LT		 2792{
2793 ENCODE_SEQID_OP_HEAD;
2794
e2f282b9
BH		 2795 if (!nfserr)
2796 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2797
f3e42237 2798 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2799 return nfserr;
1da177e4
LT		 2800}
2801
2802
695e12f8 2803static __be32
b37ad28b 2804nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2805{
bc749ca4 2806 __be32 *p;
1da177e4
LT		 2807
2808 if (!nfserr) {
2809 RESERVE_SPACE(20);
c654b8a9 2810 write_cinfo(&p, &link->li_cinfo);
1da177e4
LT		 2811 ADJUST_ARGS();
2812 }
695e12f8 2813 return nfserr;
1da177e4
LT		 2814}
2815
2816
695e12f8 2817static __be32
b37ad28b 2818nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2819{
bc749ca4 2820 __be32 *p;
1da177e4
LT		 2821 ENCODE_SEQID_OP_HEAD;
2822
2823 if (nfserr)
2824 goto out;
2825
e2f282b9
BH		 2826 nfsd4_encode_stateid(resp, &open->op_stateid);
2827 RESERVE_SPACE(40);
c654b8a9 2828 write_cinfo(&p, &open->op_cinfo);
1da177e4
LT		 2829 WRITE32(open->op_rflags);
2830 WRITE32(2);
2831 WRITE32(open->op_bmval[0]);
2832 WRITE32(open->op_bmval[1]);
2833 WRITE32(open->op_delegate_type);
2834 ADJUST_ARGS();
2835
2836 switch (open->op_delegate_type) {
2837 case NFS4_OPEN_DELEGATE_NONE:
2838 break;
2839 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2840 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2841 RESERVE_SPACE(20);
7b190fec 2842 WRITE32(open->op_recall);
1da177e4
LT		 2843
2844 /*
2845 * TODO: ACE's in delegations
2846 */
2847 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2848 WRITE32(0);
2849 WRITE32(0);
2850 WRITE32(0); /* XXX: is NULL principal ok? */
2851 ADJUST_ARGS();
2852 break;
2853 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2854 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2855 RESERVE_SPACE(32);
1da177e4
LT		 2856 WRITE32(0);
2857
2858 /*
2859 * TODO: space_limit's in delegations
2860 */
2861 WRITE32(NFS4_LIMIT_SIZE);
2862 WRITE32(~(u32)0);
2863 WRITE32(~(u32)0);
2864
2865 /*
2866 * TODO: ACE's in delegations
2867 */
2868 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2869 WRITE32(0);
2870 WRITE32(0);
2871 WRITE32(0); /* XXX: is NULL principal ok? */
2872 ADJUST_ARGS();
2873 break;
d24433cd
BH		 2874 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
2875 switch (open->op_why_no_deleg) {
2876 case WND4_CONTENTION:
2877 case WND4_RESOURCE:
2878 RESERVE_SPACE(8);
2879 WRITE32(open->op_why_no_deleg);
2880 WRITE32(0); /* deleg signaling not supported yet */
2881 break;
2882 default:
2883 RESERVE_SPACE(4);
2884 WRITE32(open->op_why_no_deleg);
2885 }
2886 ADJUST_ARGS();
2887 break;
1da177e4
LT		 2888 default:
2889 BUG();
2890 }
2891 /* XXX save filehandle here */
2892out:
f3e42237 2893 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2894 return nfserr;
1da177e4
LT		 2895}
2896
695e12f8 2897static __be32
b37ad28b 2898nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4
LT		 2899{
2900 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2901
2902 if (!nfserr)
2903 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4 2904
f3e42237 2905 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2906 return nfserr;
1da177e4
LT		 2907}
2908
695e12f8 2909static __be32
b37ad28b 2910nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4
LT		 2911{
2912 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2913
2914 if (!nfserr)
2915 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4 2916
f3e42237 2917 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2918 return nfserr;
1da177e4
LT		 2919}
2920
b37ad28b
AV		 2921static __be32
2922nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2923 struct nfsd4_read *read)
1da177e4
LT		 2924{
2925 u32 eof;
2926 int v, pn;
2927 unsigned long maxcount;
2928 long len;
bc749ca4 2929 __be32 *p;
1da177e4
LT		 2930
2931 if (nfserr)
2932 return nfserr;
2933 if (resp->xbuf->page_len)
2934 return nfserr_resource;
2935
2936 RESERVE_SPACE(8); /* eof flag and byte count */
2937
7adae489 2938 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2939 if (maxcount > read->rd_length)
2940 maxcount = read->rd_length;
2941
2942 len = maxcount;
2943 v = 0;
2944 while (len > 0) {
44524359 2945 pn = resp->rqstp->rq_resused++;
3cc03b16 2946 resp->rqstp->rq_vec[v].iov_base =
44524359 2947 page_address(resp->rqstp->rq_respages[pn]);
3cc03b16 2948 resp->rqstp->rq_vec[v].iov_len =
44524359 2949 len < PAGE_SIZE ? len : PAGE_SIZE;
1da177e4
LT		 2950 v++;
2951 len -= PAGE_SIZE;
2952 }
2953 read->rd_vlen = v;
2954
039a87ca 2955 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2956 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2957 &maxcount);
2958
1da177e4
LT		 2959 if (nfserr)
2960 return nfserr;
44524359
N		 2961 eof = (read->rd_offset + maxcount >=
2962 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2963
2964 WRITE32(eof);
2965 WRITE32(maxcount);
2966 ADJUST_ARGS();
6ed6decc
N		 2967 resp->xbuf->head[0].iov_len = (char*)p
2968 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2969 resp->xbuf->page_len = maxcount;
2970
6ed6decc 2971 /* Use rest of head for padding and remaining ops: */
6ed6decc 2972 resp->xbuf->tail[0].iov_base = p;
1da177e4 2973 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2974 if (maxcount&3) {
6ed6decc
N		 2975 RESERVE_SPACE(4);
2976 WRITE32(0);
1da177e4
LT		 2977 resp->xbuf->tail[0].iov_base += maxcount&3;
2978 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2979 ADJUST_ARGS();
1da177e4
LT		 2980 }
2981 return 0;
2982}
2983
b37ad28b
AV		 2984static __be32
2985nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 2986{
2987 int maxcount;
2988 char *page;
bc749ca4 2989 __be32 *p;
1da177e4
LT		 2990
2991 if (nfserr)
2992 return nfserr;
2993 if (resp->xbuf->page_len)
2994 return nfserr_resource;
2995
44524359 2996 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2997
2998 maxcount = PAGE_SIZE;
2999 RESERVE_SPACE(4);
3000
3001 /*
3002 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3003 * if they would overflow the buffer. Is this kosher in NFSv4? If
3004 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3005 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3006 */
3007 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
3008 if (nfserr == nfserr_isdir)
3009 return nfserr_inval;
3010 if (nfserr)
3011 return nfserr;
3012
3013 WRITE32(maxcount);
3014 ADJUST_ARGS();
6ed6decc
N		 3015 resp->xbuf->head[0].iov_len = (char*)p
3016 - (char*)resp->xbuf->head[0].iov_base;
3017 resp->xbuf->page_len = maxcount;
1da177e4 3018
6ed6decc 3019 /* Use rest of head for padding and remaining ops: */
6ed6decc 3020 resp->xbuf->tail[0].iov_base = p;
1da177e4 3021 resp->xbuf->tail[0].iov_len = 0;
1da177e4 3022 if (maxcount&3) {
6ed6decc
N		 3023 RESERVE_SPACE(4);
3024 WRITE32(0);
1da177e4
LT		 3025 resp->xbuf->tail[0].iov_base += maxcount&3;
3026 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 3027 ADJUST_ARGS();
1da177e4
LT		 3028 }
3029 return 0;
3030}
3031
b37ad28b
AV		 3032static __be32
3033nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3034{
3035 int maxcount;
3036 loff_t offset;
2ebbc012 3037 __be32 *page, *savep, *tailbase;
bc749ca4 3038 __be32 *p;
1da177e4
LT		 3039
3040 if (nfserr)
3041 return nfserr;
3042 if (resp->xbuf->page_len)
3043 return nfserr_resource;
3044
ab4684d1 3045 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
1da177e4
LT		 3046 savep = p;
3047
3048 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3049 WRITE32(0);
3050 WRITE32(0);
3051 ADJUST_ARGS();
3052 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 3053 tailbase = p;
1da177e4
LT		 3054
3055 maxcount = PAGE_SIZE;
3056 if (maxcount > readdir->rd_maxcount)
3057 maxcount = readdir->rd_maxcount;
3058
3059 /*
3060 * Convert from bytes to words, account for the two words already
3061 * written, make sure to leave two words at the end for the next
3062 * pointer and eof field.
3063 */
3064 maxcount = (maxcount >> 2) - 4;
3065 if (maxcount < 0) {
3066 nfserr = nfserr_toosmall;
3067 goto err_no_verf;
3068 }
3069
44524359 3070 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 3071 readdir->common.err = 0;
3072 readdir->buflen = maxcount;
3073 readdir->buffer = page;
3074 readdir->offset = NULL;
3075
3076 offset = readdir->rd_cookie;
3077 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3078 &offset,
3079 &readdir->common, nfsd4_encode_dirent);
3080 if (nfserr == nfs_ok &&
3081 readdir->common.err == nfserr_toosmall &&
3082 readdir->buffer == page)
3083 nfserr = nfserr_toosmall;
1da177e4
LT		 3084 if (nfserr)
3085 goto err_no_verf;
3086
3087 if (readdir->offset)
3088 xdr_encode_hyper(readdir->offset, offset);
3089
3090 p = readdir->buffer;
3091 *p++ = 0; /* no more entries */
3092 *p++ = htonl(readdir->common.err == nfserr_eof);
44524359
N		 3093 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
3094 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
1da177e4 3095
bb6e8a9f 3096 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 3097 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 3098 resp->xbuf->tail[0].iov_len = 0;
3099 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 3100 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 3101
3102 return 0;
3103err_no_verf:
3104 p = savep;
3105 ADJUST_ARGS();
3106 return nfserr;
3107}
3108
695e12f8 3109static __be32
b37ad28b 3110nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3111{
bc749ca4 3112 __be32 *p;
1da177e4
LT		 3113
3114 if (!nfserr) {
3115 RESERVE_SPACE(20);
c654b8a9 3116 write_cinfo(&p, &remove->rm_cinfo);
1da177e4
LT		 3117 ADJUST_ARGS();
3118 }
695e12f8 3119 return nfserr;
1da177e4
LT		 3120}
3121
695e12f8 3122static __be32
b37ad28b 3123nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3124{
bc749ca4 3125 __be32 *p;
1da177e4
LT		 3126
3127 if (!nfserr) {
3128 RESERVE_SPACE(40);
c654b8a9
BF		 3129 write_cinfo(&p, &rename->rn_sinfo);
3130 write_cinfo(&p, &rename->rn_tinfo);
1da177e4
LT		 3131 ADJUST_ARGS();
3132 }
695e12f8 3133 return nfserr;
1da177e4
LT		 3134}
3135
695e12f8 3136static __be32
22b6dee8
MJ		 3137nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
3138 __be32 nfserr,struct svc_export *exp)
dcb488a3
AA		 3139{
3140 int i = 0;
4796f457
BF		 3141 u32 nflavs;
3142 struct exp_flavor_info *flavs;
3143 struct exp_flavor_info def_flavs[2];
bc749ca4 3144 __be32 *p;
dcb488a3
AA		 3145
3146 if (nfserr)
3147 goto out;
4796f457
BF		 3148 if (exp->ex_nflavors) {
3149 flavs = exp->ex_flavors;
3150 nflavs = exp->ex_nflavors;
3151 } else { /* Handling of some defaults in absence of real secinfo: */
3152 flavs = def_flavs;
3153 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3154 nflavs = 2;
3155 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3156 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3157 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3158 nflavs = 1;
3159 flavs[0].pseudoflavor
3160 = svcauth_gss_flavor(exp->ex_client);
3161 } else {
3162 nflavs = 1;
3163 flavs[0].pseudoflavor
3164 = exp->ex_client->flavour->flavour;
3165 }
3166 }
3167
dcb488a3 3168 RESERVE_SPACE(4);
4796f457 3169 WRITE32(nflavs);
dcb488a3 3170 ADJUST_ARGS();
4796f457
BF		 3171 for (i = 0; i < nflavs; i++) {
3172 u32 flav = flavs[i].pseudoflavor;
dcb488a3
AA		 3173 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
3174
3175 if (gm) {
3176 RESERVE_SPACE(4);
3177 WRITE32(RPC_AUTH_GSS);
3178 ADJUST_ARGS();
3179 RESERVE_SPACE(4 + gm->gm_oid.len);
3180 WRITE32(gm->gm_oid.len);
3181 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
3182 ADJUST_ARGS();
3183 RESERVE_SPACE(4);
3184 WRITE32(0); /* qop */
3185 ADJUST_ARGS();
3186 RESERVE_SPACE(4);
3187 WRITE32(gss_pseudoflavor_to_service(gm, flav));
3188 ADJUST_ARGS();
3189 gss_mech_put(gm);
3190 } else {
3191 RESERVE_SPACE(4);
3192 WRITE32(flav);
3193 ADJUST_ARGS();
3194 }
3195 }
3196out:
3197 if (exp)
3198 exp_put(exp);
695e12f8 3199 return nfserr;
dcb488a3
AA		 3200}
3201
22b6dee8
MJ		 3202static __be32
3203nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3204 struct nfsd4_secinfo *secinfo)
3205{
3206 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3207}
3208
3209static __be32
3210nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3211 struct nfsd4_secinfo_no_name *secinfo)
3212{
3213 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3214}
3215
1da177e4
LT		 3216/*
3217 * The SETATTR encode routine is special -- it always encodes a bitmap,
3218 * regardless of the error status.
3219 */
695e12f8 3220static __be32
b37ad28b 3221nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3222{
bc749ca4 3223 __be32 *p;
1da177e4
LT		 3224
3225 RESERVE_SPACE(12);
3226 if (nfserr) {
3227 WRITE32(2);
3228 WRITE32(0);
3229 WRITE32(0);
3230 }
3231 else {
3232 WRITE32(2);
3233 WRITE32(setattr->sa_bmval[0]);
3234 WRITE32(setattr->sa_bmval[1]);
3235 }
3236 ADJUST_ARGS();
695e12f8 3237 return nfserr;
1da177e4
LT		 3238}
3239
695e12f8 3240static __be32
b37ad28b 3241nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3242{
bc749ca4 3243 __be32 *p;
1da177e4
LT		 3244
3245 if (!nfserr) {
ab4684d1 3246 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE);
1da177e4 3247 WRITEMEM(&scd->se_clientid, 8);
ab4684d1 3248 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3249 ADJUST_ARGS();
3250 }
3251 else if (nfserr == nfserr_clid_inuse) {
3252 RESERVE_SPACE(8);
3253 WRITE32(0);
3254 WRITE32(0);
3255 ADJUST_ARGS();
3256 }
695e12f8 3257 return nfserr;
1da177e4
LT		 3258}
3259
695e12f8 3260static __be32
b37ad28b 3261nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3262{
bc749ca4 3263 __be32 *p;
1da177e4
LT		 3264
3265 if (!nfserr) {
3266 RESERVE_SPACE(16);
3267 WRITE32(write->wr_bytes_written);
3268 WRITE32(write->wr_how_written);
ab4684d1 3269 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3270 ADJUST_ARGS();
3271 }
695e12f8 3272 return nfserr;
1da177e4
LT		 3273}
3274
2db134eb 3275static __be32
57b7b43b 3276nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3277 struct nfsd4_exchange_id *exid)
3278{
bc749ca4 3279 __be32 *p;
0733d213
AA		 3280 char *major_id;
3281 char *server_scope;
3282 int major_id_sz;
3283 int server_scope_sz;
3284 uint64_t minor_id = 0;
3285
3286 if (nfserr)
3287 return nfserr;
3288
3289 major_id = utsname()->nodename;
3290 major_id_sz = strlen(major_id);
3291 server_scope = utsname()->nodename;
3292 server_scope_sz = strlen(server_scope);
3293
3294 RESERVE_SPACE(
3295 8 /* eir_clientid */ +
3296 4 /* eir_sequenceid */ +
3297 4 /* eir_flags */ +
3298 4 /* spr_how (SP4_NONE) */ +
3299 8 /* so_minor_id */ +
3300 4 /* so_major_id.len */ +
3301 (XDR_QUADLEN(major_id_sz) * 4) +
3302 4 /* eir_server_scope.len */ +
3303 (XDR_QUADLEN(server_scope_sz) * 4) +
3304 4 /* eir_server_impl_id.count (0) */);
3305
3306 WRITEMEM(&exid->clientid, 8);
3307 WRITE32(exid->seqid);
3308 WRITE32(exid->flags);
3309
3310 /* state_protect4_r. Currently only support SP4_NONE */
3311 BUG_ON(exid->spa_how != SP4_NONE);
3312 WRITE32(exid->spa_how);
3313
3314 /* The server_owner struct */
3315 WRITE64(minor_id); /* Minor id */
3316 /* major id */
3317 WRITE32(major_id_sz);
3318 WRITEMEM(major_id, major_id_sz);
3319
3320 /* Server scope */
3321 WRITE32(server_scope_sz);
3322 WRITEMEM(server_scope, server_scope_sz);
3323
3324 /* Implementation id */
3325 WRITE32(0); /* zero length nfs_impl_id4 array */
3326 ADJUST_ARGS();
3327 return 0;
2db134eb
AA		 3328}
3329
3330static __be32
57b7b43b 3331nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3332 struct nfsd4_create_session *sess)
3333{
bc749ca4 3334 __be32 *p;
ec6b5d7b
AA		 3335
3336 if (nfserr)
3337 return nfserr;
3338
3339 RESERVE_SPACE(24);
3340 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3341 WRITE32(sess->seqid);
3342 WRITE32(sess->flags);
3343 ADJUST_ARGS();
3344
3345 RESERVE_SPACE(28);
3346 WRITE32(0); /* headerpadsz */
3347 WRITE32(sess->fore_channel.maxreq_sz);
3348 WRITE32(sess->fore_channel.maxresp_sz);
3349 WRITE32(sess->fore_channel.maxresp_cached);
3350 WRITE32(sess->fore_channel.maxops);
3351 WRITE32(sess->fore_channel.maxreqs);
3352 WRITE32(sess->fore_channel.nr_rdma_attrs);
3353 ADJUST_ARGS();
3354
3355 if (sess->fore_channel.nr_rdma_attrs) {
3356 RESERVE_SPACE(4);
3357 WRITE32(sess->fore_channel.rdma_attrs);
3358 ADJUST_ARGS();
3359 }
3360
3361 RESERVE_SPACE(28);
3362 WRITE32(0); /* headerpadsz */
3363 WRITE32(sess->back_channel.maxreq_sz);
3364 WRITE32(sess->back_channel.maxresp_sz);
3365 WRITE32(sess->back_channel.maxresp_cached);
3366 WRITE32(sess->back_channel.maxops);
3367 WRITE32(sess->back_channel.maxreqs);
3368 WRITE32(sess->back_channel.nr_rdma_attrs);
3369 ADJUST_ARGS();
3370
3371 if (sess->back_channel.nr_rdma_attrs) {
3372 RESERVE_SPACE(4);
3373 WRITE32(sess->back_channel.rdma_attrs);
3374 ADJUST_ARGS();
3375 }
3376 return 0;
2db134eb
AA		 3377}
3378
3379static __be32
57b7b43b 3380nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3381 struct nfsd4_destroy_session *destroy_session)
3382{
2db134eb
AA		 3383 return nfserr;
3384}
3385
e1ca12df 3386static __be32
d1829b38 3387nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
e1ca12df
BS		 3388 struct nfsd4_free_stateid *free_stateid)
3389{
3390 __be32 *p;
3391
3392 if (nfserr)
3393 return nfserr;
3394
3395 RESERVE_SPACE(4);
d1829b38 3396 *p++ = nfserr;
e1ca12df
BS		 3397 ADJUST_ARGS();
3398 return nfserr;
3399}
3400
c47d832b 3401static __be32
57b7b43b 3402nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3403 struct nfsd4_sequence *seq)
3404{
bc749ca4 3405 __be32 *p;
b85d4c01
BH		 3406
3407 if (nfserr)
3408 return nfserr;
3409
3410 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3411 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3412 WRITE32(seq->seqid);
3413 WRITE32(seq->slotid);
b7d7ca35
BF		 3414 /* Note slotid's are numbered from zero: */
3415 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3416 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
0d7bb719 3417 WRITE32(seq->status_flags);
b85d4c01
BH		 3418
3419 ADJUST_ARGS();
557ce264 3420 resp->cstate.datap = p; /* DRC cache data pointer */
b85d4c01 3421 return 0;
2db134eb
AA		 3422}
3423
2355c596 3424static __be32
57b7b43b 3425nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3426 struct nfsd4_test_stateid *test_stateid)
3427{
03cfb420 3428 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3429 __be32 *p;
17456804 3430
03cfb420 3431 RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
17456804 3432 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3433
03cfb420 3434 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3435 *p++ = stateid->ts_id_status;
17456804 3436 }
17456804 3437
03cfb420 3438 ADJUST_ARGS();
17456804
BS		 3439 return nfserr;
3440}
3441
695e12f8
BH		 3442static __be32
3443nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3444{
3445 return nfserr;
3446}
3447
3448typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3449
2db134eb
AA		 3450/*
3451 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3452 * since we don't need to filter out obsolete ops as this is
3453 * done in the decoding phase.
3454 */
695e12f8 3455static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3456 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3457 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3458 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3459 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3460 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3461 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3462 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3463 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3464 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3465 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3466 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3467 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3468 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3469 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3470 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3471 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3472 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3473 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3474 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3475 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3476 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3477 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3478 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3479 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3480 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3481 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3482 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3483 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3484 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3485 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3486 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3487 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3488 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3489 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3490 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3491 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3492 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3493
3494 /* NFSv4.1 operations */
3495 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3496 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3497 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3498 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3499 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
e1ca12df 3500 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
2db134eb
AA		 3501 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3502 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3503 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3504 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3505 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3506 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3507 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3508 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3509 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3510 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3511 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3512 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3513 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3514};
3515
496c262c
AA		 3516/*
3517 * Calculate the total amount of memory that the compound response has taken
58e7b33a 3518 * after encoding the current operation with pad.
496c262c 3519 *
58e7b33a
MJ		 3520 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3521 * which was specified at nfsd4_operation, else pad is zero.
496c262c 3522 *
58e7b33a 3523 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
496c262c
AA		 3524 *
3525 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3526 * will be at least a page and will therefore hold the xdr_buf head.
3527 */
57b7b43b 3528__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
496c262c 3529{
496c262c 3530 struct xdr_buf *xb = &resp->rqstp->rq_res;
496c262c
AA		 3531 struct nfsd4_session *session = NULL;
3532 struct nfsd4_slot *slot = resp->cstate.slot;
58e7b33a 3533 u32 length, tlen = 0;
496c262c
AA		 3534
3535 if (!nfsd4_has_session(&resp->cstate))
58e7b33a 3536 return 0;
496c262c
AA		 3537
3538 session = resp->cstate.session;
58e7b33a
MJ		 3539 if (session == NULL)
3540 return 0;
496c262c
AA		 3541
3542 if (xb->page_len == 0) {
3543 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3544 } else {
3545 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3546 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3547
3548 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3549 }
3550 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3551 length, xb->page_len, tlen, pad);
3552
58e7b33a
MJ		 3553 if (length > session->se_fchannel.maxresp_sz)
3554 return nfserr_rep_too_big;
3555
73e79482 3556 if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
58e7b33a 3557 length > session->se_fchannel.maxresp_cached)
496c262c 3558 return nfserr_rep_too_big_to_cache;
58e7b33a
MJ		 3559
3560 return 0;
496c262c
AA		 3561}
3562
1da177e4
LT		 3563void
3564nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3565{
2ebbc012 3566 __be32 *statp;
bc749ca4 3567 __be32 *p;
1da177e4
LT		 3568
3569 RESERVE_SPACE(8);
3570 WRITE32(op->opnum);
3571 statp = p++; /* to be backfilled at the end */
3572 ADJUST_ARGS();
3573
695e12f8
BH		 3574 if (op->opnum == OP_ILLEGAL)
3575 goto status;
3576 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3577 !nfsd4_enc_ops[op->opnum]);
3578 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
496c262c 3579 /* nfsd4_check_drc_limit guarantees enough room for error status */
58e7b33a
MJ		 3580 if (!op->status)
3581 op->status = nfsd4_check_resp_size(resp, 0);
695e12f8 3582status:
1da177e4
LT		 3583 /*
3584 * Note: We write the status directly, instead of using WRITE32(),
3585 * since it is already in network byte order.
3586 */
3587 *statp = op->status;
3588}
3589
3590/*
3591 * Encode the reply stored in the stateowner reply cache
3592 *
3593 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3594 * previously sent already encoded operation.
3595 *
3596 * called with nfs4_lock_state() held
3597 */
3598void
3599nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3600{
bc749ca4 3601 __be32 *p;
1da177e4
LT		 3602 struct nfs4_replay *rp = op->replay;
3603
3604 BUG_ON(!rp);
3605
3606 RESERVE_SPACE(8);
3607 WRITE32(op->opnum);
3608 *p++ = rp->rp_status; /* already xdr'ed */
3609 ADJUST_ARGS();
3610
3611 RESERVE_SPACE(rp->rp_buflen);
3612 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3613 ADJUST_ARGS();
3614}
3615
1da177e4 3616int
2ebbc012 3617nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3618{
3619 return xdr_ressize_check(rqstp, p);
3620}
3621
3e98abff 3622int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3623{
3e98abff
BF		 3624 struct svc_rqst *rqstp = rq;
3625 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3626
1da177e4
LT		 3627 if (args->ops != args->iops) {
3628 kfree(args->ops);
3629 args->ops = args->iops;
3630 }
f99d49ad
JJ		 3631 kfree(args->tmpp);
3632 args->tmpp = NULL;
1da177e4
LT		 3633 while (args->to_free) {
3634 struct tmpbuf *tb = args->to_free;
3635 args->to_free = tb->next;
3636 tb->release(tb->buf);
3637 kfree(tb);
3638 }
3e98abff 3639 return 1;
1da177e4
LT		 3640}
3641
3642int
2ebbc012 3643nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3644{
1da177e4
LT		 3645 args->p = p;
3646 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3647 args->pagelist = rqstp->rq_arg.pages;
3648 args->pagelen = rqstp->rq_arg.page_len;
3649 args->tmpp = NULL;
3650 args->to_free = NULL;
3651 args->ops = args->iops;
3652 args->rqstp = rqstp;
3653
3e98abff 3654 return !nfsd4_decode_compound(args);
1da177e4
LT		 3655}
3656
3657int
2ebbc012 3658nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3659{
3660 /*
3661 * All that remains is to write the tag and operation count...
3662 */
557ce264 3663 struct nfsd4_compound_state *cs = &resp->cstate;
1da177e4
LT		 3664 struct kvec *iov;
3665 p = resp->tagp;
3666 *p++ = htonl(resp->taglen);
3667 memcpy(p, resp->tag, resp->taglen);
3668 p += XDR_QUADLEN(resp->taglen);
3669 *p++ = htonl(resp->opcnt);
3670
3671 if (rqstp->rq_res.page_len)
3672 iov = &rqstp->rq_res.tail[0];
3673 else
3674 iov = &rqstp->rq_res.head[0];
3675 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3676 BUG_ON(iov->iov_len > PAGE_SIZE);
26c0c75e
BF		 3677 if (nfsd4_has_session(cs)) {
3678 if (cs->status != nfserr_replay_cache) {
3679 nfsd4_store_cache_entry(resp);
73e79482 3680 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 3681 }
d7682988
BH		 3682 /* Renew the clientid on success and on replay */
3683 release_session_client(cs->session);
76407f76 3684 nfsd4_put_session(cs->session);
da3846a2 3685 }
1da177e4
LT		 3686 return 1;
3687}
3688
3689/*
3690 * Local variables:
3691 * c-basic-offset: 8
3692 * End:
3693 */
kernel source for telekom puls (alcatel/mediatek)