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nfsd4: simplify reading of opnum
[deliverable/linux.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"
2ca72e17 56
1da177e4
LT		 57#define NFSDDBG_FACILITY NFSDDBG_XDR
58
42ca0993
BF		 59/*
60 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
61 * directory in order to indicate to the client that a filesystem boundary is present
62 * We use a fixed fsid for a referral
63 */
64#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
65#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
66
b37ad28b
AV		 67static __be32
68check_filename(char *str, int len, __be32 err)
1da177e4
LT		 69{
70 int i;
71
72 if (len == 0)
73 return nfserr_inval;
74 if (isdotent(str, len))
75 return err;
76 for (i = 0; i < len; i++)
77 if (str[i] == '/')
78 return err;
79 return 0;
80}
81
1da177e4 82#define DECODE_HEAD \
2ebbc012 83 __be32 *p; \
b37ad28b 84 __be32 status
1da177e4
LT		 85#define DECODE_TAIL \
86 status = 0; \
87out: \
88 return status; \
89xdr_error: \
817cb9d4
CL		 90 dprintk("NFSD: xdr error (%s:%d)\n", \
91 __FILE__, __LINE__); \
1da177e4
LT		 92 status = nfserr_bad_xdr; \
93 goto out
94
95#define READ32(x) (x) = ntohl(*p++)
96#define READ64(x) do { \
97 (x) = (u64)ntohl(*p++) << 32; \
98 (x) |= ntohl(*p++); \
99} while (0)
100#define READTIME(x) do { \
101 p++; \
102 (x) = ntohl(*p++); \
103 p++; \
104} while (0)
105#define READMEM(x,nbytes) do { \
106 x = (char *)p; \
107 p += XDR_QUADLEN(nbytes); \
108} while (0)
109#define SAVEMEM(x,nbytes) do { \
110 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
111 savemem(argp, p, nbytes) : \
112 (char *)p)) { \
817cb9d4
CL		 113 dprintk("NFSD: xdr error (%s:%d)\n", \
114 __FILE__, __LINE__); \
1da177e4
LT		 115 goto xdr_error; \
116 } \
117 p += XDR_QUADLEN(nbytes); \
118} while (0)
119#define COPYMEM(x,nbytes) do { \
120 memcpy((x), p, nbytes); \
121 p += XDR_QUADLEN(nbytes); \
122} while (0)
123
124/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
125#define READ_BUF(nbytes) do { \
126 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
127 p = argp->p; \
128 argp->p += XDR_QUADLEN(nbytes); \
129 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 130 dprintk("NFSD: xdr error (%s:%d)\n", \
131 __FILE__, __LINE__); \
1da177e4
LT		 132 goto xdr_error; \
133 } \
134} while (0)
135
ca2a05aa 136static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 137{
138 /* We want more bytes than seem to be available.
139 * Maybe we need a new page, maybe we have just run out
140 */
ca2a05aa 141 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 142 __be32 *p;
1da177e4
LT		 143 if (avail + argp->pagelen < nbytes)
144 return NULL;
145 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
146 return NULL;
147 /* ok, we can do it with the current plus the next page */
148 if (nbytes <= sizeof(argp->tmp))
149 p = argp->tmp;
150 else {
f99d49ad 151 kfree(argp->tmpp);
1da177e4
LT		 152 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
153 if (!p)
154 return NULL;
155
156 }
ca2a05aa
BF		 157 /*
158 * The following memcpy is safe because read_buf is always
159 * called with nbytes > avail, and the two cases above both
160 * guarantee p points to at least nbytes bytes.
161 */
1da177e4
LT		 162 memcpy(p, argp->p, avail);
163 /* step to next page */
164 argp->p = page_address(argp->pagelist[0]);
165 argp->pagelist++;
166 if (argp->pagelen < PAGE_SIZE) {
2bc3c117 167 argp->end = argp->p + (argp->pagelen>>2);
1da177e4
LT		 168 argp->pagelen = 0;
169 } else {
2bc3c117 170 argp->end = argp->p + (PAGE_SIZE>>2);
1da177e4
LT		 171 argp->pagelen -= PAGE_SIZE;
172 }
173 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
174 argp->p += XDR_QUADLEN(nbytes - avail);
175 return p;
176}
177
60adfc50
AA		 178static int zero_clientid(clientid_t *clid)
179{
180 return (clid->cl_boot == 0) && (clid->cl_id == 0);
181}
182
1da177e4
LT		 183static int
184defer_free(struct nfsd4_compoundargs *argp,
185 void (*release)(const void *), void *p)
186{
187 struct tmpbuf *tb;
188
189 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
190 if (!tb)
191 return -ENOMEM;
192 tb->buf = p;
193 tb->release = release;
194 tb->next = argp->to_free;
195 argp->to_free = tb;
196 return 0;
197}
198
2ebbc012 199static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 200{
1da177e4 201 if (p == argp->tmp) {
67114fe6 202 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
a4db5fe5
BF		 203 if (!p)
204 return NULL;
1da177e4 205 } else {
73dff8be 206 BUG_ON(p != argp->tmpp);
1da177e4
LT		 207 argp->tmpp = NULL;
208 }
209 if (defer_free(argp, kfree, p)) {
a4db5fe5 210 kfree(p);
1da177e4
LT		 211 return NULL;
212 } else
213 return (char *)p;
214}
215
b37ad28b 216static __be32
1da177e4
LT		 217nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
218{
219 u32 bmlen;
220 DECODE_HEAD;
221
222 bmval[0] = 0;
223 bmval[1] = 0;
7e705706 224 bmval[2] = 0;
1da177e4
LT		 225
226 READ_BUF(4);
227 READ32(bmlen);
228 if (bmlen > 1000)
229 goto xdr_error;
230
231 READ_BUF(bmlen << 2);
232 if (bmlen > 0)
233 READ32(bmval[0]);
234 if (bmlen > 1)
235 READ32(bmval[1]);
7e705706
AA		 236 if (bmlen > 2)
237 READ32(bmval[2]);
1da177e4
LT		 238
239 DECODE_TAIL;
240}
241
b37ad28b 242static __be32
3c8e0316 243nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
c0d6fc8a 244 struct iattr *iattr, struct nfs4_acl **acl)
1da177e4
LT		 245{
246 int expected_len, len = 0;
247 u32 dummy32;
248 char *buf;
b8dd7b9a 249 int host_err;
1da177e4
LT		 250
251 DECODE_HEAD;
252 iattr->ia_valid = 0;
253 if ((status = nfsd4_decode_bitmap(argp, bmval)))
254 return status;
255
1da177e4
LT		 256 READ_BUF(4);
257 READ32(expected_len);
258
259 if (bmval[0] & FATTR4_WORD0_SIZE) {
260 READ_BUF(8);
261 len += 8;
262 READ64(iattr->ia_size);
263 iattr->ia_valid |= ATTR_SIZE;
264 }
265 if (bmval[0] & FATTR4_WORD0_ACL) {
28e05dd8
BF		 266 int nace;
267 struct nfs4_ace *ace;
1da177e4
LT		 268
269 READ_BUF(4); len += 4;
270 READ32(nace);
271
28e05dd8
BF		 272 if (nace > NFS4_ACL_MAX)
273 return nfserr_resource;
274
275 *acl = nfs4_acl_new(nace);
1da177e4 276 if (*acl == NULL) {
b8dd7b9a 277 host_err = -ENOMEM;
1da177e4
LT		 278 goto out_nfserr;
279 }
28e05dd8 280 defer_free(argp, kfree, *acl);
1da177e4 281
28e05dd8
BF		 282 (*acl)->naces = nace;
283 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 284 READ_BUF(16); len += 16;
28e05dd8
BF		 285 READ32(ace->type);
286 READ32(ace->flag);
287 READ32(ace->access_mask);
1da177e4
LT		 288 READ32(dummy32);
289 READ_BUF(dummy32);
290 len += XDR_QUADLEN(dummy32) << 2;
291 READMEM(buf, dummy32);
28e05dd8 292 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 293 status = nfs_ok;
28e05dd8
BF		 294 if (ace->whotype != NFS4_ACL_WHO_NAMED)
295 ace->who = 0;
296 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 297 status = nfsd_map_name_to_gid(argp->rqstp,
28e05dd8 298 buf, dummy32, &ace->who);
1da177e4 299 else
3c726023 300 status = nfsd_map_name_to_uid(argp->rqstp,
28e05dd8 301 buf, dummy32, &ace->who);
3c726023
BF		 302 if (status)
303 return status;
1da177e4
LT		 304 }
305 } else
306 *acl = NULL;
307 if (bmval[1] & FATTR4_WORD1_MODE) {
308 READ_BUF(4);
309 len += 4;
310 READ32(iattr->ia_mode);
311 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
312 iattr->ia_valid |= ATTR_MODE;
313 }
314 if (bmval[1] & FATTR4_WORD1_OWNER) {
315 READ_BUF(4);
316 len += 4;
317 READ32(dummy32);
318 READ_BUF(dummy32);
319 len += (XDR_QUADLEN(dummy32) << 2);
320 READMEM(buf, dummy32);
47c85291
N		 321 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
322 return status;
1da177e4
LT		 323 iattr->ia_valid |= ATTR_UID;
324 }
325 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
326 READ_BUF(4);
327 len += 4;
328 READ32(dummy32);
329 READ_BUF(dummy32);
330 len += (XDR_QUADLEN(dummy32) << 2);
331 READMEM(buf, dummy32);
47c85291
N		 332 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
333 return status;
1da177e4
LT		 334 iattr->ia_valid |= ATTR_GID;
335 }
336 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
337 READ_BUF(4);
338 len += 4;
339 READ32(dummy32);
340 switch (dummy32) {
341 case NFS4_SET_TO_CLIENT_TIME:
342 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
343 all 32 bits of 'nseconds'. */
344 READ_BUF(12);
345 len += 12;
346 READ32(dummy32);
347 if (dummy32)
348 return nfserr_inval;
349 READ32(iattr->ia_atime.tv_sec);
350 READ32(iattr->ia_atime.tv_nsec);
351 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
352 return nfserr_inval;
353 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
354 break;
355 case NFS4_SET_TO_SERVER_TIME:
356 iattr->ia_valid |= ATTR_ATIME;
357 break;
358 default:
359 goto xdr_error;
360 }
361 }
1da177e4
LT		 362 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
363 READ_BUF(4);
364 len += 4;
365 READ32(dummy32);
366 switch (dummy32) {
367 case NFS4_SET_TO_CLIENT_TIME:
368 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
369 all 32 bits of 'nseconds'. */
370 READ_BUF(12);
371 len += 12;
372 READ32(dummy32);
373 if (dummy32)
374 return nfserr_inval;
375 READ32(iattr->ia_mtime.tv_sec);
376 READ32(iattr->ia_mtime.tv_nsec);
377 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
378 return nfserr_inval;
379 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
380 break;
381 case NFS4_SET_TO_SERVER_TIME:
382 iattr->ia_valid |= ATTR_MTIME;
383 break;
384 default:
385 goto xdr_error;
386 }
387 }
3c8e0316
YZ		 388 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
389 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
390 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
391 READ_BUF(expected_len - len);
392 else if (len != expected_len)
1da177e4
LT		 393 goto xdr_error;
394
395 DECODE_TAIL;
396
397out_nfserr:
b8dd7b9a 398 status = nfserrno(host_err);
1da177e4
LT		 399 goto out;
400}
401
e31a1b66
BH		 402static __be32
403nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
404{
405 DECODE_HEAD;
406
407 READ_BUF(sizeof(stateid_t));
408 READ32(sid->si_generation);
409 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
410
411 DECODE_TAIL;
412}
413
b37ad28b 414static __be32
1da177e4
LT		 415nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
416{
417 DECODE_HEAD;
418
419 READ_BUF(4);
420 READ32(access->ac_req_access);
421
422 DECODE_TAIL;
423}
424
acb2887e
BF		 425static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
426{
427 DECODE_HEAD;
12fc3e92 428 u32 dummy, uid, gid;
acb2887e
BF		 429 char *machine_name;
430 int i;
431 int nr_secflavs;
432
433 /* callback_sec_params4 */
434 READ_BUF(4);
435 READ32(nr_secflavs);
12fc3e92 436 cbs->flavor = (u32)(-1);
acb2887e
BF		 437 for (i = 0; i < nr_secflavs; ++i) {
438 READ_BUF(4);
439 READ32(dummy);
440 switch (dummy) {
441 case RPC_AUTH_NULL:
442 /* Nothing to read */
12fc3e92
BF		 443 if (cbs->flavor == (u32)(-1))
444 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 445 break;
446 case RPC_AUTH_UNIX:
447 READ_BUF(8);
448 /* stamp */
449 READ32(dummy);
450
451 /* machine name */
452 READ32(dummy);
453 READ_BUF(dummy);
454 SAVEMEM(machine_name, dummy);
455
456 /* uid, gid */
457 READ_BUF(8);
12fc3e92
BF		 458 READ32(uid);
459 READ32(gid);
acb2887e
BF		 460
461 /* more gids */
462 READ_BUF(4);
463 READ32(dummy);
464 READ_BUF(dummy * 4);
12fc3e92
BF		 465 if (cbs->flavor == (u32)(-1)) {
466 cbs->uid = uid;
467 cbs->gid = gid;
468 cbs->flavor = RPC_AUTH_UNIX;
469 }
acb2887e
BF		 470 break;
471 case RPC_AUTH_GSS:
472 dprintk("RPC_AUTH_GSS callback secflavor "
473 "not supported!\n");
474 READ_BUF(8);
475 /* gcbp_service */
476 READ32(dummy);
477 /* gcbp_handle_from_server */
478 READ32(dummy);
479 READ_BUF(dummy);
480 p += XDR_QUADLEN(dummy);
481 /* gcbp_handle_from_client */
482 READ_BUF(4);
483 READ32(dummy);
484 READ_BUF(dummy);
485 break;
486 default:
487 dprintk("Illegal callback secflavor\n");
488 return nfserr_inval;
489 }
490 }
491 DECODE_TAIL;
492}
493
cb73a9f4
BF		 494static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
495{
496 DECODE_HEAD;
497
498 READ_BUF(4);
499 READ32(bc->bc_cb_program);
500 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
501
502 DECODE_TAIL;
503}
504
1d1bc8f2
BF		 505static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
506{
507 DECODE_HEAD;
1d1bc8f2
BF		 508
509 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
510 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
511 READ32(bcts->dir);
6ce2357f
BS		 512 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
513 * could help us figure out we should be using it. */
1d1bc8f2
BF		 514 DECODE_TAIL;
515}
516
b37ad28b 517static __be32
1da177e4
LT		 518nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
519{
520 DECODE_HEAD;
521
e31a1b66 522 READ_BUF(4);
1da177e4 523 READ32(close->cl_seqid);
e31a1b66 524 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 525
526 DECODE_TAIL;
527}
528
529
b37ad28b 530static __be32
1da177e4
LT		 531nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
532{
533 DECODE_HEAD;
534
535 READ_BUF(12);
536 READ64(commit->co_offset);
537 READ32(commit->co_count);
538
539 DECODE_TAIL;
540}
541
b37ad28b 542static __be32
1da177e4
LT		 543nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
544{
545 DECODE_HEAD;
546
547 READ_BUF(4);
548 READ32(create->cr_type);
549 switch (create->cr_type) {
550 case NF4LNK:
551 READ_BUF(4);
552 READ32(create->cr_linklen);
553 READ_BUF(create->cr_linklen);
554 SAVEMEM(create->cr_linkname, create->cr_linklen);
555 break;
556 case NF4BLK:
557 case NF4CHR:
558 READ_BUF(8);
559 READ32(create->cr_specdata1);
560 READ32(create->cr_specdata2);
561 break;
562 case NF4SOCK:
563 case NF4FIFO:
564 case NF4DIR:
565 default:
566 break;
567 }
568
569 READ_BUF(4);
570 READ32(create->cr_namelen);
571 READ_BUF(create->cr_namelen);
572 SAVEMEM(create->cr_name, create->cr_namelen);
573 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
574 return status;
575
3c8e0316
YZ		 576 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
577 &create->cr_acl);
c0d6fc8a 578 if (status)
1da177e4
LT		 579 goto out;
580
581 DECODE_TAIL;
582}
583
b37ad28b 584static inline __be32
1da177e4
LT		 585nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
586{
e31a1b66 587 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 588}
589
b37ad28b 590static inline __be32
1da177e4
LT		 591nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
592{
593 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
594}
595
b37ad28b 596static __be32
1da177e4
LT		 597nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
598{
599 DECODE_HEAD;
600
601 READ_BUF(4);
602 READ32(link->li_namelen);
603 READ_BUF(link->li_namelen);
604 SAVEMEM(link->li_name, link->li_namelen);
605 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
606 return status;
607
608 DECODE_TAIL;
609}
610
b37ad28b 611static __be32
1da177e4
LT		 612nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
613{
614 DECODE_HEAD;
615
1da177e4
LT		 616 /*
617 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
618 */
619 READ_BUF(28);
620 READ32(lock->lk_type);
621 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
622 goto xdr_error;
623 READ32(lock->lk_reclaim);
624 READ64(lock->lk_offset);
625 READ64(lock->lk_length);
626 READ32(lock->lk_is_new);
627
628 if (lock->lk_is_new) {
e31a1b66 629 READ_BUF(4);
1da177e4 630 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 631 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
632 if (status)
633 return status;
634 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 635 READ32(lock->lk_new_lock_seqid);
636 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
637 READ32(lock->lk_new_owner.len);
638 READ_BUF(lock->lk_new_owner.len);
639 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
640 } else {
e31a1b66
BH		 641 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
642 if (status)
643 return status;
644 READ_BUF(4);
1da177e4
LT		 645 READ32(lock->lk_old_lock_seqid);
646 }
647
648 DECODE_TAIL;
649}
650
b37ad28b 651static __be32
1da177e4
LT		 652nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
653{
654 DECODE_HEAD;
655
656 READ_BUF(32);
657 READ32(lockt->lt_type);
658 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
659 goto xdr_error;
660 READ64(lockt->lt_offset);
661 READ64(lockt->lt_length);
662 COPYMEM(&lockt->lt_clientid, 8);
663 READ32(lockt->lt_owner.len);
664 READ_BUF(lockt->lt_owner.len);
665 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
666
667 DECODE_TAIL;
668}
669
b37ad28b 670static __be32
1da177e4
LT		 671nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
672{
673 DECODE_HEAD;
674
e31a1b66 675 READ_BUF(8);
1da177e4
LT		 676 READ32(locku->lu_type);
677 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
678 goto xdr_error;
679 READ32(locku->lu_seqid);
e31a1b66
BH		 680 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
681 if (status)
682 return status;
683 READ_BUF(16);
1da177e4
LT		 684 READ64(locku->lu_offset);
685 READ64(locku->lu_length);
686
687 DECODE_TAIL;
688}
689
b37ad28b 690static __be32
1da177e4
LT		 691nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
692{
693 DECODE_HEAD;
694
695 READ_BUF(4);
696 READ32(lookup->lo_len);
697 READ_BUF(lookup->lo_len);
698 SAVEMEM(lookup->lo_name, lookup->lo_len);
699 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
700 return status;
701
702 DECODE_TAIL;
703}
704
2c8bd7e0 705static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 706{
707 __be32 *p;
708 u32 w;
709
710 READ_BUF(4);
711 READ32(w);
2c8bd7e0
BH		 712 *share_access = w & NFS4_SHARE_ACCESS_MASK;
713 *deleg_want = w & NFS4_SHARE_WANT_MASK;
714 if (deleg_when)
715 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
716
04f9e664
BF		 717 switch (w & NFS4_SHARE_ACCESS_MASK) {
718 case NFS4_SHARE_ACCESS_READ:
719 case NFS4_SHARE_ACCESS_WRITE:
720 case NFS4_SHARE_ACCESS_BOTH:
721 break;
722 default:
723 return nfserr_bad_xdr;
724 }
fc0d14fe 725 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 726 if (!w)
727 return nfs_ok;
728 if (!argp->minorversion)
729 return nfserr_bad_xdr;
730 switch (w & NFS4_SHARE_WANT_MASK) {
731 case NFS4_SHARE_WANT_NO_PREFERENCE:
732 case NFS4_SHARE_WANT_READ_DELEG:
733 case NFS4_SHARE_WANT_WRITE_DELEG:
734 case NFS4_SHARE_WANT_ANY_DELEG:
735 case NFS4_SHARE_WANT_NO_DELEG:
736 case NFS4_SHARE_WANT_CANCEL:
737 break;
738 default:
739 return nfserr_bad_xdr;
740 }
92bac8c5 741 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 742 if (!w)
743 return nfs_ok;
2c8bd7e0
BH		 744
745 if (!deleg_when) /* open_downgrade */
746 return nfserr_inval;
04f9e664
BF		 747 switch (w) {
748 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
749 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 750 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
751 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 752 return nfs_ok;
753 }
754xdr_error:
755 return nfserr_bad_xdr;
756}
757
758static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
759{
760 __be32 *p;
761
762 READ_BUF(4);
763 READ32(*x);
764 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 765 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 766 return nfserr_bad_xdr;
767 return nfs_ok;
768xdr_error:
769 return nfserr_bad_xdr;
770}
771
a084daf5
BF		 772static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
773{
774 __be32 *p;
775
776 READ_BUF(4);
777 READ32(o->len);
778
779 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
780 return nfserr_bad_xdr;
781
782 READ_BUF(o->len);
783 SAVEMEM(o->data, o->len);
784 return nfs_ok;
785xdr_error:
786 return nfserr_bad_xdr;
787}
788
b37ad28b 789static __be32
1da177e4
LT		 790nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
791{
792 DECODE_HEAD;
2c8bd7e0 793 u32 dummy;
1da177e4
LT		 794
795 memset(open->op_bmval, 0, sizeof(open->op_bmval));
796 open->op_iattr.ia_valid = 0;
fe0750e5 797 open->op_openowner = NULL;
1da177e4
LT		 798
799 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 800 READ_BUF(4);
1da177e4 801 READ32(open->op_seqid);
2c8bd7e0
BH		 802 /* decode, yet ignore deleg_when until supported */
803 status = nfsd4_decode_share_access(argp, &open->op_share_access,
804 &open->op_deleg_want, &dummy);
04f9e664
BF		 805 if (status)
806 goto xdr_error;
807 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
808 if (status)
809 goto xdr_error;
a084daf5 810 READ_BUF(sizeof(clientid_t));
1da177e4 811 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 812 status = nfsd4_decode_opaque(argp, &open->op_owner);
813 if (status)
814 goto xdr_error;
815 READ_BUF(4);
1da177e4
LT		 816 READ32(open->op_create);
817 switch (open->op_create) {
818 case NFS4_OPEN_NOCREATE:
819 break;
820 case NFS4_OPEN_CREATE:
821 READ_BUF(4);
822 READ32(open->op_createmode);
823 switch (open->op_createmode) {
824 case NFS4_CREATE_UNCHECKED:
825 case NFS4_CREATE_GUARDED:
c0d6fc8a 826 status = nfsd4_decode_fattr(argp, open->op_bmval,
3c8e0316 827 &open->op_iattr, &open->op_acl);
c0d6fc8a 828 if (status)
1da177e4
LT		 829 goto out;
830 break;
831 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 832 READ_BUF(NFS4_VERIFIER_SIZE);
833 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 834 break;
79fb54ab
BH		 835 case NFS4_CREATE_EXCLUSIVE4_1:
836 if (argp->minorversion < 1)
837 goto xdr_error;
ab4684d1
CL		 838 READ_BUF(NFS4_VERIFIER_SIZE);
839 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 840 status = nfsd4_decode_fattr(argp, open->op_bmval,
3c8e0316 841 &open->op_iattr, &open->op_acl);
79fb54ab
BH		 842 if (status)
843 goto out;
844 break;
1da177e4
LT		 845 default:
846 goto xdr_error;
847 }
848 break;
849 default:
850 goto xdr_error;
851 }
852
853 /* open_claim */
854 READ_BUF(4);
855 READ32(open->op_claim_type);
856 switch (open->op_claim_type) {
857 case NFS4_OPEN_CLAIM_NULL:
858 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
859 READ_BUF(4);
860 READ32(open->op_fname.len);
861 READ_BUF(open->op_fname.len);
862 SAVEMEM(open->op_fname.data, open->op_fname.len);
863 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
864 return status;
865 break;
866 case NFS4_OPEN_CLAIM_PREVIOUS:
867 READ_BUF(4);
868 READ32(open->op_delegate_type);
869 break;
870 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 871 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
872 if (status)
873 return status;
874 READ_BUF(4);
1da177e4
LT		 875 READ32(open->op_fname.len);
876 READ_BUF(open->op_fname.len);
877 SAVEMEM(open->op_fname.data, open->op_fname.len);
878 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
879 return status;
880 break;
8b289b2c
BF		 881 case NFS4_OPEN_CLAIM_FH:
882 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
883 if (argp->minorversion < 1)
884 goto xdr_error;
885 /* void */
886 break;
887 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
888 if (argp->minorversion < 1)
889 goto xdr_error;
890 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
891 if (status)
892 return status;
893 break;
1da177e4
LT		 894 default:
895 goto xdr_error;
896 }
897
898 DECODE_TAIL;
899}
900
b37ad28b 901static __be32
1da177e4
LT		 902nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
903{
904 DECODE_HEAD;
905
e31a1b66
BH		 906 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
907 if (status)
908 return status;
909 READ_BUF(4);
1da177e4
LT		 910 READ32(open_conf->oc_seqid);
911
912 DECODE_TAIL;
913}
914
b37ad28b 915static __be32
1da177e4
LT		 916nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
917{
918 DECODE_HEAD;
919
e31a1b66
BH		 920 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
921 if (status)
922 return status;
04f9e664 923 READ_BUF(4);
1da177e4 924 READ32(open_down->od_seqid);
2c8bd7e0
BH		 925 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
926 &open_down->od_deleg_want, NULL);
04f9e664
BF		 927 if (status)
928 return status;
929 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
930 if (status)
931 return status;
1da177e4
LT		 932 DECODE_TAIL;
933}
934
b37ad28b 935static __be32
1da177e4
LT		 936nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
937{
938 DECODE_HEAD;
939
940 READ_BUF(4);
941 READ32(putfh->pf_fhlen);
942 if (putfh->pf_fhlen > NFS4_FHSIZE)
943 goto xdr_error;
944 READ_BUF(putfh->pf_fhlen);
945 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
946
947 DECODE_TAIL;
948}
949
b37ad28b 950static __be32
1da177e4
LT		 951nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
952{
953 DECODE_HEAD;
954
e31a1b66
BH		 955 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
956 if (status)
957 return status;
958 READ_BUF(12);
1da177e4
LT		 959 READ64(read->rd_offset);
960 READ32(read->rd_length);
961
962 DECODE_TAIL;
963}
964
b37ad28b 965static __be32
1da177e4
LT		 966nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
967{
968 DECODE_HEAD;
969
970 READ_BUF(24);
971 READ64(readdir->rd_cookie);
972 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
973 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
974 READ32(readdir->rd_maxcount);
975 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
976 goto out;
977
978 DECODE_TAIL;
979}
980
b37ad28b 981static __be32
1da177e4
LT		 982nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
983{
984 DECODE_HEAD;
985
986 READ_BUF(4);
987 READ32(remove->rm_namelen);
988 READ_BUF(remove->rm_namelen);
989 SAVEMEM(remove->rm_name, remove->rm_namelen);
990 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
991 return status;
992
993 DECODE_TAIL;
994}
995
b37ad28b 996static __be32
1da177e4
LT		 997nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
998{
999 DECODE_HEAD;
1000
1001 READ_BUF(4);
1002 READ32(rename->rn_snamelen);
1003 READ_BUF(rename->rn_snamelen + 4);
1004 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1005 READ32(rename->rn_tnamelen);
1006 READ_BUF(rename->rn_tnamelen);
1007 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1008 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
1009 return status;
1010 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
1011 return status;
1012
1013 DECODE_TAIL;
1014}
1015
b37ad28b 1016static __be32
1da177e4
LT		 1017nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1018{
1019 DECODE_HEAD;
1020
1021 READ_BUF(sizeof(clientid_t));
1022 COPYMEM(clientid, sizeof(clientid_t));
1023
1024 DECODE_TAIL;
1025}
1026
dcb488a3
AA		 1027static __be32
1028nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1029 struct nfsd4_secinfo *secinfo)
1030{
1031 DECODE_HEAD;
1032
1033 READ_BUF(4);
1034 READ32(secinfo->si_namelen);
1035 READ_BUF(secinfo->si_namelen);
1036 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1037 status = check_filename(secinfo->si_name, secinfo->si_namelen,
1038 nfserr_noent);
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;
1146 int v;
1147 int len;
1148 DECODE_HEAD;
1149
e31a1b66
BH		 1150 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1151 if (status)
1152 return status;
1153 READ_BUF(16);
1da177e4
LT		 1154 READ64(write->wr_offset);
1155 READ32(write->wr_stable_how);
1156 if (write->wr_stable_how > 2)
1157 goto xdr_error;
1158 READ32(write->wr_buflen);
1159
1160 /* Sorry .. no magic macros for this.. *
1161 * READ_BUF(write->wr_buflen);
1162 * SAVEMEM(write->wr_buf, write->wr_buflen);
1163 */
1164 avail = (char*)argp->end - (char*)argp->p;
1165 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1166 dprintk("NFSD: xdr error (%s:%d)\n",
1167 __FILE__, __LINE__);
1da177e4
LT		 1168 goto xdr_error;
1169 }
3cc03b16
N		 1170 argp->rqstp->rq_vec[0].iov_base = p;
1171 argp->rqstp->rq_vec[0].iov_len = avail;
1da177e4
LT		 1172 v = 0;
1173 len = write->wr_buflen;
3cc03b16
N		 1174 while (len > argp->rqstp->rq_vec[v].iov_len) {
1175 len -= argp->rqstp->rq_vec[v].iov_len;
1da177e4 1176 v++;
3cc03b16 1177 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1da177e4
LT		 1178 argp->pagelist++;
1179 if (argp->pagelen >= PAGE_SIZE) {
3cc03b16 1180 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1da177e4
LT		 1181 argp->pagelen -= PAGE_SIZE;
1182 } else {
3cc03b16 1183 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1da177e4
LT		 1184 argp->pagelen -= len;
1185 }
1186 }
2ebbc012
AV		 1187 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
1188 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
3cc03b16 1189 argp->rqstp->rq_vec[v].iov_len = len;
1da177e4
LT		 1190 write->wr_vlen = v+1;
1191
1192 DECODE_TAIL;
1193}
1194
b37ad28b 1195static __be32
1da177e4
LT		 1196nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1197{
1198 DECODE_HEAD;
1199
1200 READ_BUF(12);
1201 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1202 READ32(rlockowner->rl_owner.len);
1203 READ_BUF(rlockowner->rl_owner.len);
1204 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1205
60adfc50
AA		 1206 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1207 return nfserr_inval;
1da177e4
LT		 1208 DECODE_TAIL;
1209}
1210
2db134eb
AA		 1211static __be32
1212nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1213 struct nfsd4_exchange_id *exid)
2db134eb 1214{
5afa040b 1215 int dummy, tmp;
0733d213
AA		 1216 DECODE_HEAD;
1217
1218 READ_BUF(NFS4_VERIFIER_SIZE);
1219 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1220
a084daf5
BF		 1221 status = nfsd4_decode_opaque(argp, &exid->clname);
1222 if (status)
1223 return nfserr_bad_xdr;
0733d213
AA		 1224
1225 READ_BUF(4);
1226 READ32(exid->flags);
1227
1228 /* Ignore state_protect4_a */
1229 READ_BUF(4);
1230 READ32(exid->spa_how);
1231 switch (exid->spa_how) {
1232 case SP4_NONE:
1233 break;
1234 case SP4_MACH_CRED:
1235 /* spo_must_enforce */
1236 READ_BUF(4);
1237 READ32(dummy);
1238 READ_BUF(dummy * 4);
1239 p += dummy;
1240
1241 /* spo_must_allow */
1242 READ_BUF(4);
1243 READ32(dummy);
1244 READ_BUF(dummy * 4);
1245 p += dummy;
1246 break;
1247 case SP4_SSV:
1248 /* ssp_ops */
1249 READ_BUF(4);
1250 READ32(dummy);
1251 READ_BUF(dummy * 4);
1252 p += dummy;
1253
1254 READ_BUF(4);
1255 READ32(dummy);
1256 READ_BUF(dummy * 4);
1257 p += dummy;
1258
1259 /* ssp_hash_algs<> */
1260 READ_BUF(4);
5afa040b
MJ		 1261 READ32(tmp);
1262 while (tmp--) {
1263 READ_BUF(4);
1264 READ32(dummy);
1265 READ_BUF(dummy);
1266 p += XDR_QUADLEN(dummy);
1267 }
0733d213
AA		 1268
1269 /* ssp_encr_algs<> */
1270 READ_BUF(4);
5afa040b
MJ		 1271 READ32(tmp);
1272 while (tmp--) {
1273 READ_BUF(4);
1274 READ32(dummy);
1275 READ_BUF(dummy);
1276 p += XDR_QUADLEN(dummy);
1277 }
0733d213
AA		 1278
1279 /* ssp_window and ssp_num_gss_handles */
1280 READ_BUF(8);
1281 READ32(dummy);
1282 READ32(dummy);
1283 break;
1284 default:
1285 goto xdr_error;
1286 }
1287
1288 /* Ignore Implementation ID */
1289 READ_BUF(4); /* nfs_impl_id4 array length */
1290 READ32(dummy);
1291
1292 if (dummy > 1)
1293 goto xdr_error;
1294
1295 if (dummy == 1) {
1296 /* nii_domain */
1297 READ_BUF(4);
1298 READ32(dummy);
1299 READ_BUF(dummy);
1300 p += XDR_QUADLEN(dummy);
1301
1302 /* nii_name */
1303 READ_BUF(4);
1304 READ32(dummy);
1305 READ_BUF(dummy);
1306 p += XDR_QUADLEN(dummy);
1307
1308 /* nii_date */
1309 READ_BUF(12);
1310 p += 3;
1311 }
1312 DECODE_TAIL;
2db134eb
AA		 1313}
1314
1315static __be32
1316nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1317 struct nfsd4_create_session *sess)
1318{
ec6b5d7b 1319 DECODE_HEAD;
ec6b5d7b 1320 u32 dummy;
ec6b5d7b
AA		 1321
1322 READ_BUF(16);
1323 COPYMEM(&sess->clientid, 8);
1324 READ32(sess->seqid);
1325 READ32(sess->flags);
1326
1327 /* Fore channel attrs */
1328 READ_BUF(28);
1329 READ32(dummy); /* headerpadsz is always 0 */
1330 READ32(sess->fore_channel.maxreq_sz);
1331 READ32(sess->fore_channel.maxresp_sz);
1332 READ32(sess->fore_channel.maxresp_cached);
1333 READ32(sess->fore_channel.maxops);
1334 READ32(sess->fore_channel.maxreqs);
1335 READ32(sess->fore_channel.nr_rdma_attrs);
1336 if (sess->fore_channel.nr_rdma_attrs == 1) {
1337 READ_BUF(4);
1338 READ32(sess->fore_channel.rdma_attrs);
1339 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1340 dprintk("Too many fore channel attr bitmaps!\n");
1341 goto xdr_error;
1342 }
1343
1344 /* Back channel attrs */
1345 READ_BUF(28);
1346 READ32(dummy); /* headerpadsz is always 0 */
1347 READ32(sess->back_channel.maxreq_sz);
1348 READ32(sess->back_channel.maxresp_sz);
1349 READ32(sess->back_channel.maxresp_cached);
1350 READ32(sess->back_channel.maxops);
1351 READ32(sess->back_channel.maxreqs);
1352 READ32(sess->back_channel.nr_rdma_attrs);
1353 if (sess->back_channel.nr_rdma_attrs == 1) {
1354 READ_BUF(4);
1355 READ32(sess->back_channel.rdma_attrs);
1356 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1357 dprintk("Too many back channel attr bitmaps!\n");
1358 goto xdr_error;
1359 }
1360
acb2887e 1361 READ_BUF(4);
ec6b5d7b 1362 READ32(sess->callback_prog);
acb2887e 1363 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1364 DECODE_TAIL;
2db134eb
AA		 1365}
1366
1367static __be32
1368nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1369 struct nfsd4_destroy_session *destroy_session)
1370{
e10e0cfc
BH		 1371 DECODE_HEAD;
1372 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1373 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1374
1375 DECODE_TAIL;
2db134eb
AA		 1376}
1377
e1ca12df
BS		 1378static __be32
1379nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1380 struct nfsd4_free_stateid *free_stateid)
1381{
1382 DECODE_HEAD;
1383
1384 READ_BUF(sizeof(stateid_t));
1385 READ32(free_stateid->fr_stateid.si_generation);
1386 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1387
1388 DECODE_TAIL;
1389}
1390
2db134eb
AA		 1391static __be32
1392nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1393 struct nfsd4_sequence *seq)
1394{
b85d4c01
BH		 1395 DECODE_HEAD;
1396
1397 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1398 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1399 READ32(seq->seqid);
1400 READ32(seq->slotid);
1401 READ32(seq->maxslots);
1402 READ32(seq->cachethis);
1403
1404 DECODE_TAIL;
2db134eb
AA		 1405}
1406
17456804
BS		 1407static __be32
1408nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1409{
17456804 1410 int i;
03cfb420
BS		 1411 __be32 *p, status;
1412 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1413
1414 READ_BUF(4);
1415 test_stateid->ts_num_ids = ntohl(*p++);
1416
03cfb420 1417 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1418
1419 for (i = 0; i < test_stateid->ts_num_ids; i++) {
03cfb420
BS		 1420 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1421 if (!stateid) {
afcf6792 1422 status = nfserrno(-ENOMEM);
03cfb420
BS		 1423 goto out;
1424 }
1425
1426 defer_free(argp, kfree, stateid);
1427 INIT_LIST_HEAD(&stateid->ts_id_list);
1428 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1429
1430 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1431 if (status)
03cfb420 1432 goto out;
17456804
BS		 1433 }
1434
1435 status = 0;
1436out:
1437 return status;
1438xdr_error:
1439 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1440 status = nfserr_bad_xdr;
1441 goto out;
1442}
1443
345c2842
MJ		 1444static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1445{
1446 DECODE_HEAD;
1447
1448 READ_BUF(8);
1449 COPYMEM(&dc->clientid, 8);
1450
1451 DECODE_TAIL;
1452}
1453
4dc6ec00
BF		 1454static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1455{
1456 DECODE_HEAD;
1457
1458 READ_BUF(4);
1459 READ32(rc->rca_one_fs);
1460
1461 DECODE_TAIL;
1462}
1463
347e0ad9
BH		 1464static __be32
1465nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1466{
1467 return nfs_ok;
1468}
1469
3c375c6f
BH		 1470static __be32
1471nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1472{
1e685ec2 1473 return nfserr_notsupp;
3c375c6f
BH		 1474}
1475
347e0ad9
BH		 1476typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1477
1478static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1479 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1480 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1481 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1482 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1483 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1484 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1485 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1486 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1487 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1488 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1489 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1490 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1491 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1492 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1493 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1494 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1495 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1496 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1497 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1498 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
a1c8c4d1 1499 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
ad1060c8
BF		 1500 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1501 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1502 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1503 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1504 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1505 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1506 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1507 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1508 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1509 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1510 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1511 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1512 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1513 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1514 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1515 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
347e0ad9
BH		 1516};
1517
2db134eb 1518static nfsd4_dec nfsd41_dec_ops[] = {
9064caae
RD		 1519 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1520 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1521 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1522 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1523 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1524 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1525 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1526 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1527 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1528 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1529 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1530 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1531 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1532 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1533 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1534 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1535 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1536 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1537 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1538 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1539 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1540 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1541 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1542 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1543 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1544 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1545 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1546 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1547 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1548 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1549 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1550 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1551 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1552 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1553 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1554 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1555 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
2db134eb
AA		 1556
1557 /* new operations for NFSv4.1 */
cb73a9f4 1558 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1559 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1560 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1561 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1562 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1563 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1564 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1565 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1566 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1567 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1568 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1569 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1570 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1571 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1572 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1573 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1574 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1575 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1576 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1577};
1578
f2feb96b
BH		 1579struct nfsd4_minorversion_ops {
1580 nfsd4_dec *decoders;
1581 int nops;
1582};
1583
1584static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
ad1060c8 1585 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
2db134eb 1586 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
f2feb96b
BH		 1587};
1588
b37ad28b 1589static __be32
1da177e4
LT		 1590nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1591{
1592 DECODE_HEAD;
1593 struct nfsd4_op *op;
f2feb96b 1594 struct nfsd4_minorversion_ops *ops;
1091006c 1595 bool cachethis = false;
1da177e4
LT		 1596 int i;
1597
1da177e4
LT		 1598 READ_BUF(4);
1599 READ32(argp->taglen);
1600 READ_BUF(argp->taglen + 8);
1601 SAVEMEM(argp->tag, argp->taglen);
1602 READ32(argp->minorversion);
1603 READ32(argp->opcnt);
1604
1605 if (argp->taglen > NFSD4_MAX_TAGLEN)
1606 goto xdr_error;
1607 if (argp->opcnt > 100)
1608 goto xdr_error;
1609
e8c96f8c 1610 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1611 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1612 if (!argp->ops) {
1613 argp->ops = argp->iops;
817cb9d4 1614 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1615 goto xdr_error;
1616 }
1617 }
1618
f2feb96b 1619 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
30cff1ff
BH		 1620 argp->opcnt = 0;
1621
f2feb96b 1622 ops = &nfsd4_minorversion[argp->minorversion];
1da177e4
LT		 1623 for (i = 0; i < argp->opcnt; i++) {
1624 op = &argp->ops[i];
1625 op->replay = NULL;
1626
8a61b18c
BF		 1627 READ_BUF(4);
1628 READ32(op->opnum);
1da177e4 1629
de3cab79 1630 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
f2feb96b 1631 op->status = ops->decoders[op->opnum](argp, &op->u);
347e0ad9 1632 else {
1da177e4
LT		 1633 op->opnum = OP_ILLEGAL;
1634 op->status = nfserr_op_illegal;
1da177e4
LT		 1635 }
1636
1637 if (op->status) {
1638 argp->opcnt = i+1;
1639 break;
1640 }
1091006c
BF		 1641 /*
1642 * We'll try to cache the result in the DRC if any one
1643 * op in the compound wants to be cached:
1644 */
1645 cachethis |= nfsd4_cache_this_op(op);
1da177e4 1646 }
1091006c
BF		 1647 /* Sessions make the DRC unnecessary: */
1648 if (argp->minorversion)
1649 cachethis = false;
1650 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4
LT		 1651
1652 DECODE_TAIL;
1653}
1da177e4 1654
1da177e4
LT		 1655#define WRITE32(n) *p++ = htonl(n)
1656#define WRITE64(n) do { \
1657 *p++ = htonl((u32)((n) >> 32)); \
1658 *p++ = htonl((u32)(n)); \
1659} while (0)
5108b276 1660#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1661 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1662 memcpy(p, ptr, nbytes); \
1663 p += XDR_QUADLEN(nbytes); \
5108b276 1664}} while (0)
c654b8a9
BF		 1665
1666static void write32(__be32 **p, u32 n)
1667{
45eaa1c1 1668 *(*p)++ = htonl(n);
c654b8a9
BF		 1669}
1670
1671static void write64(__be32 **p, u64 n)
1672{
45eaa1c1 1673 write32(p, (n >> 32));
c654b8a9
BF		 1674 write32(p, (u32)n);
1675}
1676
1677static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1678{
1679 if (IS_I_VERSION(inode)) {
1680 write64(p, inode->i_version);
1681 } else {
1682 write32(p, stat->ctime.tv_sec);
1683 write32(p, stat->ctime.tv_nsec);
1684 }
1685}
1686
1687static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1688{
1689 write32(p, c->atomic);
1690 if (c->change_supported) {
1691 write64(p, c->before_change);
1692 write64(p, c->after_change);
1693 } else {
1694 write32(p, c->before_ctime_sec);
1695 write32(p, c->before_ctime_nsec);
1696 write32(p, c->after_ctime_sec);
1697 write32(p, c->after_ctime_nsec);
1698 }
1699}
1da177e4
LT		 1700
1701#define RESERVE_SPACE(nbytes) do { \
1702 p = resp->p; \
1703 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1704} while (0)
1705#define ADJUST_ARGS() resp->p = p
1706
1707/*
1708 * Header routine to setup seqid operation replay cache
1709 */
1710#define ENCODE_SEQID_OP_HEAD \
2ebbc012 1711 __be32 *save; \
1da177e4
LT		 1712 \
1713 save = resp->p;
1714
1715/*
7fb64cee
N		 1716 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1717 * is where sequence id's are incremented, and the replay cache is filled.
1718 * Note that we increment sequence id's here, at the last moment, so we're sure
1719 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1720 */
1721
f3e42237
BF		 1722static void encode_seqid_op_tail(struct nfsd4_compoundres *resp, __be32 *save, __be32 nfserr)
1723{
1724 struct nfs4_stateowner *stateowner = resp->cstate.replay_owner;
1725
1726 if (seqid_mutating_err(ntohl(nfserr)) && stateowner) {
1727 stateowner->so_seqid++;
1728 stateowner->so_replay.rp_status = nfserr;
1729 stateowner->so_replay.rp_buflen =
1730 (char *)resp->p - (char *)save;
1731 memcpy(stateowner->so_replay.rp_buf, save,
1732 stateowner->so_replay.rp_buflen);
38c387b5 1733 nfsd4_purge_closed_stateid(stateowner);
f3e42237
BF		 1734 }
1735}
1da177e4 1736
81c3f413 1737/* Encode as an array of strings the string given with components
e7a0444a 1738 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1739 */
e7a0444a
WAA		 1740static __be32 nfsd4_encode_components_esc(char sep, char *components,
1741 __be32 **pp, int *buflen,
1742 char esc_enter, char esc_exit)
81c3f413 1743{
2ebbc012
AV		 1744 __be32 *p = *pp;
1745 __be32 *countp = p;
81c3f413 1746 int strlen, count=0;
e7a0444a 1747 char *str, *end, *next;
81c3f413
BF		 1748
1749 dprintk("nfsd4_encode_components(%s)\n", components);
1750 if ((*buflen -= 4) < 0)
1751 return nfserr_resource;
1752 WRITE32(0); /* We will fill this in with @count later */
1753 end = str = components;
1754 while (*end) {
e7a0444a
WAA		 1755 bool found_esc = false;
1756
1757 /* try to parse as esc_start, ..., esc_end, sep */
1758 if (*str == esc_enter) {
1759 for (; *end && (*end != esc_exit); end++)
1760 /* find esc_exit or end of string */;
1761 next = end + 1;
1762 if (*end && (!*next || *next == sep)) {
1763 str++;
1764 found_esc = true;
1765 }
1766 }
1767
1768 if (!found_esc)
1769 for (; *end && (*end != sep); end++)
1770 /* find sep or end of string */;
1771
81c3f413
BF		 1772 strlen = end - str;
1773 if (strlen) {
1774 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1775 return nfserr_resource;
1776 WRITE32(strlen);
1777 WRITEMEM(str, strlen);
1778 count++;
1779 }
1780 else
1781 end++;
1782 str = end;
1783 }
1784 *pp = p;
1785 p = countp;
1786 WRITE32(count);
1787 return 0;
1788}
1789
e7a0444a
WAA		 1790/* Encode as an array of strings the string given with components
1791 * separated @sep.
1792 */
1793static __be32 nfsd4_encode_components(char sep, char *components,
1794 __be32 **pp, int *buflen)
1795{
1796 return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
1797}
1798
81c3f413
BF		 1799/*
1800 * encode a location element of a fs_locations structure
1801 */
b37ad28b 1802static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1803 __be32 **pp, int *buflen)
81c3f413 1804{
b37ad28b 1805 __be32 status;
2ebbc012 1806 __be32 *p = *pp;
81c3f413 1807
e7a0444a
WAA		 1808 status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
1809 '[', ']');
81c3f413
BF		 1810 if (status)
1811 return status;
1812 status = nfsd4_encode_components('/', location->path, &p, buflen);
1813 if (status)
1814 return status;
1815 *pp = p;
1816 return 0;
1817}
1818
1819/*
ed748aac 1820 * Encode a path in RFC3530 'pathname4' format
81c3f413 1821 */
ed748aac
TM		 1822static __be32 nfsd4_encode_path(const struct path *root,
1823 const struct path *path, __be32 **pp, int *buflen)
81c3f413 1824{
ed748aac
TM		 1825 struct path cur = {
1826 .mnt = path->mnt,
1827 .dentry = path->dentry,
1828 };
1829 __be32 *p = *pp;
1830 struct dentry **components = NULL;
1831 unsigned int ncomponents = 0;
1832 __be32 err = nfserr_jukebox;
81c3f413 1833
ed748aac 1834 dprintk("nfsd4_encode_components(");
81c3f413 1835
ed748aac
TM		 1836 path_get(&cur);
1837 /* First walk the path up to the nfsd root, and store the
1838 * dentries/path components in an array.
1839 */
1840 for (;;) {
1841 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1842 break;
1843 if (cur.dentry == cur.mnt->mnt_root) {
1844 if (follow_up(&cur))
1845 continue;
1846 goto out_free;
1847 }
1848 if ((ncomponents & 15) == 0) {
1849 struct dentry **new;
1850 new = krealloc(components,
1851 sizeof(*new) * (ncomponents + 16),
1852 GFP_KERNEL);
1853 if (!new)
1854 goto out_free;
1855 components = new;
1856 }
1857 components[ncomponents++] = cur.dentry;
1858 cur.dentry = dget_parent(cur.dentry);
1859 }
81c3f413 1860
ed748aac
TM		 1861 *buflen -= 4;
1862 if (*buflen < 0)
1863 goto out_free;
1864 WRITE32(ncomponents);
1865
1866 while (ncomponents) {
1867 struct dentry *dentry = components[ncomponents - 1];
1868 unsigned int len = dentry->d_name.len;
1869
1870 *buflen -= 4 + (XDR_QUADLEN(len) << 2);
1871 if (*buflen < 0)
1872 goto out_free;
1873 WRITE32(len);
1874 WRITEMEM(dentry->d_name.name, len);
1875 dprintk("/%s", dentry->d_name.name);
1876 dput(dentry);
1877 ncomponents--;
81c3f413 1878 }
ed748aac
TM		 1879
1880 *pp = p;
1881 err = 0;
1882out_free:
1883 dprintk(")\n");
1884 while (ncomponents)
1885 dput(components[--ncomponents]);
1886 kfree(components);
1887 path_put(&cur);
1888 return err;
1889}
1890
1891static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
1892 const struct path *path, __be32 **pp, int *buflen)
1893{
1894 struct svc_export *exp_ps;
1895 __be32 res;
1896
1897 exp_ps = rqst_find_fsidzero_export(rqstp);
1898 if (IS_ERR(exp_ps))
1899 return nfserrno(PTR_ERR(exp_ps));
1900 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
1901 exp_put(exp_ps);
1902 return res;
81c3f413
BF		 1903}
1904
1905/*
1906 * encode a fs_locations structure
1907 */
b37ad28b 1908static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1909 struct svc_export *exp,
2ebbc012 1910 __be32 **pp, int *buflen)
81c3f413 1911{
b37ad28b 1912 __be32 status;
cc45f017 1913 int i;
2ebbc012 1914 __be32 *p = *pp;
81c3f413 1915 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1916
ed748aac 1917 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
81c3f413
BF		 1918 if (status)
1919 return status;
1920 if ((*buflen -= 4) < 0)
1921 return nfserr_resource;
1922 WRITE32(fslocs->locations_count);
1923 for (i=0; i<fslocs->locations_count; i++) {
1924 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1925 &p, buflen);
1926 if (status)
1927 return status;
1928 }
1929 *pp = p;
1930 return 0;
1931}
1da177e4 1932
3d2544b1
BF		 1933static u32 nfs4_file_type(umode_t mode)
1934{
1935 switch (mode & S_IFMT) {
1936 case S_IFIFO: return NF4FIFO;
1937 case S_IFCHR: return NF4CHR;
1938 case S_IFDIR: return NF4DIR;
1939 case S_IFBLK: return NF4BLK;
1940 case S_IFLNK: return NF4LNK;
1941 case S_IFREG: return NF4REG;
1942 case S_IFSOCK: return NF4SOCK;
1943 default: return NF4BAD;
1944 };
1945}
1da177e4 1946
b37ad28b 1947static __be32
1da177e4 1948nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1949 __be32 **p, int *buflen)
1da177e4
LT		 1950{
1951 int status;
1952
1953 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1954 return nfserr_resource;
1955 if (whotype != NFS4_ACL_WHO_NAMED)
1956 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1957 else if (group)
1958 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1959 else
1960 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1961 if (status < 0)
1962 return nfserrno(status);
1963 *p = xdr_encode_opaque(*p, NULL, status);
1964 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1965 BUG_ON(*buflen < 0);
1966 return 0;
1967}
1968
b37ad28b 1969static inline __be32
2ebbc012 1970nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1da177e4
LT		 1971{
1972 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1973}
1974
b37ad28b 1975static inline __be32
2ebbc012 1976nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1da177e4
LT		 1977{
1978 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1979}
1980
b37ad28b 1981static inline __be32
1da177e4 1982nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1983 __be32 **p, int *buflen)
1da177e4
LT		 1984{
1985 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1986}
1987
42ca0993
BF		 1988#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1989 FATTR4_WORD0_RDATTR_ERROR)
1990#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1991
b37ad28b 1992static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1993{
1994 /* As per referral draft: */
1995 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1996 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1997 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1998 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1999 *rdattr_err = NFSERR_MOVED;
2000 else
2001 return nfserr_moved;
2002 }
2003 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2004 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2005 return 0;
2006}
1da177e4 2007
ae7095a7
BF		 2008
2009static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2010{
2011 struct path path = exp->ex_path;
2012 int err;
2013
2014 path_get(&path);
2015 while (follow_up(&path)) {
2016 if (path.dentry != path.mnt->mnt_root)
2017 break;
2018 }
2019 err = vfs_getattr(path.mnt, path.dentry, stat);
2020 path_put(&path);
2021 return err;
2022}
2023
1da177e4
LT		 2024/*
2025 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2026 * ourselves.
2027 *
2028 * @countp is the buffer size in _words_; upon successful return this becomes
2029 * replaced with the number of words written.
2030 */
b37ad28b 2031__be32
1da177e4 2032nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2ebbc012 2033 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
406a7ea9 2034 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2035{
2036 u32 bmval0 = bmval[0];
2037 u32 bmval1 = bmval[1];
7e705706 2038 u32 bmval2 = bmval[2];
1da177e4
LT		 2039 struct kstat stat;
2040 struct svc_fh tempfh;
2041 struct kstatfs statfs;
2042 int buflen = *countp << 2;
2ebbc012 2043 __be32 *attrlenp;
1da177e4
LT		 2044 u32 dummy;
2045 u64 dummy64;
42ca0993 2046 u32 rdattr_err = 0;
2ebbc012 2047 __be32 *p = buffer;
b37ad28b 2048 __be32 status;
b8dd7b9a 2049 int err;
1da177e4
LT		 2050 int aclsupport = 0;
2051 struct nfs4_acl *acl = NULL;
7e705706
AA		 2052 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2053 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2054 struct path path = {
2055 .mnt = exp->ex_path.mnt,
2056 .dentry = dentry,
2057 };
1da177e4
LT		 2058
2059 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2060 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2061 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2062 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2063
42ca0993 2064 if (exp->ex_fslocs.migrated) {
7e705706 2065 BUG_ON(bmval[2]);
42ca0993
BF		 2066 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2067 if (status)
2068 goto out;
2069 }
2070
54775491 2071 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
b8dd7b9a 2072 if (err)
1da177e4 2073 goto out_nfserr;
a16e92ed
BF		 2074 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2075 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2076 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2077 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2078 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2079 if (err)
1da177e4
LT		 2080 goto out_nfserr;
2081 }
2082 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2083 fh_init(&tempfh, NFS4_FHSIZE);
2084 status = fh_compose(&tempfh, exp, dentry, NULL);
2085 if (status)
2086 goto out;
2087 fhp = &tempfh;
2088 }
2089 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2090 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2091 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2092 aclsupport = (err == 0);
1da177e4 2093 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2094 if (err == -EOPNOTSUPP)
1da177e4 2095 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2096 else if (err == -EINVAL) {
1da177e4
LT		 2097 status = nfserr_attrnotsupp;
2098 goto out;
b8dd7b9a 2099 } else if (err != 0)
1da177e4
LT		 2100 goto out_nfserr;
2101 }
2102 }
1da177e4 2103
2b44f1ba
BH		 2104 if (bmval2) {
2105 if ((buflen -= 16) < 0)
2106 goto out_resource;
7e705706
AA		 2107 WRITE32(3);
2108 WRITE32(bmval0);
2109 WRITE32(bmval1);
2110 WRITE32(bmval2);
2b44f1ba
BH		 2111 } else if (bmval1) {
2112 if ((buflen -= 12) < 0)
2113 goto out_resource;
7e705706
AA		 2114 WRITE32(2);
2115 WRITE32(bmval0);
2116 WRITE32(bmval1);
2117 } else {
2b44f1ba
BH		 2118 if ((buflen -= 8) < 0)
2119 goto out_resource;
7e705706
AA		 2120 WRITE32(1);
2121 WRITE32(bmval0);
2122 }
1da177e4
LT		 2123 attrlenp = p++; /* to be backfilled later */
2124
2125 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2126 u32 word0 = nfsd_suppattrs0(minorversion);
2127 u32 word1 = nfsd_suppattrs1(minorversion);
2128 u32 word2 = nfsd_suppattrs2(minorversion);
2129
42ca0993
BF		 2130 if (!aclsupport)
2131 word0 &= ~FATTR4_WORD0_ACL;
7e705706 2132 if (!word2) {
2b44f1ba
BH		 2133 if ((buflen -= 12) < 0)
2134 goto out_resource;
7e705706
AA		 2135 WRITE32(2);
2136 WRITE32(word0);
2137 WRITE32(word1);
2138 } else {
2b44f1ba
BH		 2139 if ((buflen -= 16) < 0)
2140 goto out_resource;
7e705706
AA		 2141 WRITE32(3);
2142 WRITE32(word0);
2143 WRITE32(word1);
2144 WRITE32(word2);
2145 }
1da177e4
LT		 2146 }
2147 if (bmval0 & FATTR4_WORD0_TYPE) {
2148 if ((buflen -= 4) < 0)
2149 goto out_resource;
3d2544b1 2150 dummy = nfs4_file_type(stat.mode);
1da177e4
LT		 2151 if (dummy == NF4BAD)
2152 goto out_serverfault;
2153 WRITE32(dummy);
2154 }
2155 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2156 if ((buflen -= 4) < 0)
2157 goto out_resource;
49640001 2158 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 2159 WRITE32(NFS4_FH_PERSISTENT);
49640001 2160 else
e34ac862 2161 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 2162 }
2163 if (bmval0 & FATTR4_WORD0_CHANGE) {
1da177e4
LT		 2164 if ((buflen -= 8) < 0)
2165 goto out_resource;
c654b8a9 2166 write_change(&p, &stat, dentry->d_inode);
1da177e4
LT		 2167 }
2168 if (bmval0 & FATTR4_WORD0_SIZE) {
2169 if ((buflen -= 8) < 0)
2170 goto out_resource;
2171 WRITE64(stat.size);
2172 }
2173 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2174 if ((buflen -= 4) < 0)
2175 goto out_resource;
2176 WRITE32(1);
2177 }
2178 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2179 if ((buflen -= 4) < 0)
2180 goto out_resource;
2181 WRITE32(1);
2182 }
2183 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2184 if ((buflen -= 4) < 0)
2185 goto out_resource;
2186 WRITE32(0);
2187 }
2188 if (bmval0 & FATTR4_WORD0_FSID) {
2189 if ((buflen -= 16) < 0)
2190 goto out_resource;
42ca0993
BF		 2191 if (exp->ex_fslocs.migrated) {
2192 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2193 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2194 } else switch(fsid_source(fhp)) {
2195 case FSIDSOURCE_FSID:
1da177e4
LT		 2196 WRITE64((u64)exp->ex_fsid);
2197 WRITE64((u64)0);
af6a4e28
N		 2198 break;
2199 case FSIDSOURCE_DEV:
1da177e4
LT		 2200 WRITE32(0);
2201 WRITE32(MAJOR(stat.dev));
2202 WRITE32(0);
2203 WRITE32(MINOR(stat.dev));
af6a4e28
N		 2204 break;
2205 case FSIDSOURCE_UUID:
2206 WRITEMEM(exp->ex_uuid, 16);
2207 break;
1da177e4
LT		 2208 }
2209 }
2210 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2211 if ((buflen -= 4) < 0)
2212 goto out_resource;
2213 WRITE32(0);
2214 }
2215 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2216 if ((buflen -= 4) < 0)
2217 goto out_resource;
cf07d2ea 2218 WRITE32(nfsd4_lease);
1da177e4
LT		 2219 }
2220 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2221 if ((buflen -= 4) < 0)
2222 goto out_resource;
42ca0993 2223 WRITE32(rdattr_err);
1da177e4
LT		 2224 }
2225 if (bmval0 & FATTR4_WORD0_ACL) {
2226 struct nfs4_ace *ace;
1da177e4
LT		 2227
2228 if (acl == NULL) {
2229 if ((buflen -= 4) < 0)
2230 goto out_resource;
2231
2232 WRITE32(0);
2233 goto out_acl;
2234 }
2235 if ((buflen -= 4) < 0)
2236 goto out_resource;
2237 WRITE32(acl->naces);
2238
28e05dd8 2239 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 2240 if ((buflen -= 4*3) < 0)
2241 goto out_resource;
2242 WRITE32(ace->type);
2243 WRITE32(ace->flag);
2244 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
2245 status = nfsd4_encode_aclname(rqstp, ace->whotype,
2246 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
2247 &p, &buflen);
2248 if (status == nfserr_resource)
2249 goto out_resource;
2250 if (status)
2251 goto out;
2252 }
2253 }
2254out_acl:
2255 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2256 if ((buflen -= 4) < 0)
2257 goto out_resource;
2258 WRITE32(aclsupport ?
2259 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2260 }
2261 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2262 if ((buflen -= 4) < 0)
2263 goto out_resource;
2264 WRITE32(1);
2265 }
2266 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2267 if ((buflen -= 4) < 0)
2268 goto out_resource;
2930d381 2269 WRITE32(0);
1da177e4
LT		 2270 }
2271 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2272 if ((buflen -= 4) < 0)
2273 goto out_resource;
2274 WRITE32(1);
2275 }
2276 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2277 if ((buflen -= 4) < 0)
2278 goto out_resource;
2279 WRITE32(1);
2280 }
2281 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2282 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2283 if (buflen < 0)
2284 goto out_resource;
2285 WRITE32(fhp->fh_handle.fh_size);
2286 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2287 }
2288 if (bmval0 & FATTR4_WORD0_FILEID) {
2289 if ((buflen -= 8) < 0)
2290 goto out_resource;
40ee5dc6 2291 WRITE64(stat.ino);
1da177e4
LT		 2292 }
2293 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2294 if ((buflen -= 8) < 0)
2295 goto out_resource;
2296 WRITE64((u64) statfs.f_ffree);
2297 }
2298 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2299 if ((buflen -= 8) < 0)
2300 goto out_resource;
2301 WRITE64((u64) statfs.f_ffree);
2302 }
2303 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2304 if ((buflen -= 8) < 0)
2305 goto out_resource;
2306 WRITE64((u64) statfs.f_files);
2307 }
81c3f413
BF		 2308 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2309 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2310 if (status == nfserr_resource)
2311 goto out_resource;
2312 if (status)
2313 goto out;
2314 }
1da177e4
LT		 2315 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2316 if ((buflen -= 4) < 0)
2317 goto out_resource;
2318 WRITE32(1);
2319 }
2320 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2321 if ((buflen -= 8) < 0)
2322 goto out_resource;
2323 WRITE64(~(u64)0);
2324 }
2325 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2326 if ((buflen -= 4) < 0)
2327 goto out_resource;
2328 WRITE32(255);
2329 }
2330 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2331 if ((buflen -= 4) < 0)
2332 goto out_resource;
a16e92ed 2333 WRITE32(statfs.f_namelen);
1da177e4
LT		 2334 }
2335 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2336 if ((buflen -= 8) < 0)
2337 goto out_resource;
7adae489 2338 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2339 }
2340 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2341 if ((buflen -= 8) < 0)
2342 goto out_resource;
7adae489 2343 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2344 }
2345 if (bmval1 & FATTR4_WORD1_MODE) {
2346 if ((buflen -= 4) < 0)
2347 goto out_resource;
2348 WRITE32(stat.mode & S_IALLUGO);
2349 }
2350 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2351 if ((buflen -= 4) < 0)
2352 goto out_resource;
2353 WRITE32(1);
2354 }
2355 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2356 if ((buflen -= 4) < 0)
2357 goto out_resource;
2358 WRITE32(stat.nlink);
2359 }
2360 if (bmval1 & FATTR4_WORD1_OWNER) {
2361 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2362 if (status == nfserr_resource)
2363 goto out_resource;
2364 if (status)
2365 goto out;
2366 }
2367 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2368 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2369 if (status == nfserr_resource)
2370 goto out_resource;
2371 if (status)
2372 goto out;
2373 }
2374 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2375 if ((buflen -= 8) < 0)
2376 goto out_resource;
2377 WRITE32((u32) MAJOR(stat.rdev));
2378 WRITE32((u32) MINOR(stat.rdev));
2379 }
2380 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2381 if ((buflen -= 8) < 0)
2382 goto out_resource;
2383 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2384 WRITE64(dummy64);
2385 }
2386 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2387 if ((buflen -= 8) < 0)
2388 goto out_resource;
2389 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2390 WRITE64(dummy64);
2391 }
2392 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2393 if ((buflen -= 8) < 0)
2394 goto out_resource;
2395 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2396 WRITE64(dummy64);
2397 }
2398 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2399 if ((buflen -= 8) < 0)
2400 goto out_resource;
2401 dummy64 = (u64)stat.blocks << 9;
2402 WRITE64(dummy64);
2403 }
2404 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2405 if ((buflen -= 12) < 0)
2406 goto out_resource;
2407 WRITE32(0);
2408 WRITE32(stat.atime.tv_sec);
2409 WRITE32(stat.atime.tv_nsec);
2410 }
2411 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2412 if ((buflen -= 12) < 0)
2413 goto out_resource;
2414 WRITE32(0);
2415 WRITE32(1);
2416 WRITE32(0);
2417 }
2418 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2419 if ((buflen -= 12) < 0)
2420 goto out_resource;
2421 WRITE32(0);
2422 WRITE32(stat.ctime.tv_sec);
2423 WRITE32(stat.ctime.tv_nsec);
2424 }
2425 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2426 if ((buflen -= 12) < 0)
2427 goto out_resource;
2428 WRITE32(0);
2429 WRITE32(stat.mtime.tv_sec);
2430 WRITE32(stat.mtime.tv_nsec);
2431 }
2432 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 2433 if ((buflen -= 8) < 0)
2434 goto out_resource;
406a7ea9
FF		 2435 /*
2436 * Get parent's attributes if not ignoring crossmount
2437 * and this is the root of a cross-mounted filesystem.
2438 */
2439 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2440 dentry == exp->ex_path.mnt->mnt_root)
2441 get_parent_attributes(exp, &stat);
40ee5dc6 2442 WRITE64(stat.ino);
1da177e4 2443 }
8c18f205
BH		 2444 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2445 WRITE32(3);
2446 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2447 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2448 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2449 }
7e705706 2450
1da177e4
LT		 2451 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2452 *countp = p - buffer;
2453 status = nfs_ok;
2454
2455out:
28e05dd8 2456 kfree(acl);
1da177e4
LT		 2457 if (fhp == &tempfh)
2458 fh_put(&tempfh);
2459 return status;
2460out_nfserr:
b8dd7b9a 2461 status = nfserrno(err);
1da177e4
LT		 2462 goto out;
2463out_resource:
2464 *countp = 0;
2465 status = nfserr_resource;
2466 goto out;
2467out_serverfault:
2468 status = nfserr_serverfault;
2469 goto out;
2470}
2471
c0ce6ec8
BF		 2472static inline int attributes_need_mount(u32 *bmval)
2473{
2474 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2475 return 1;
2476 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2477 return 1;
2478 return 0;
2479}
2480
b37ad28b 2481static __be32
1da177e4 2482nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2ebbc012 2483 const char *name, int namlen, __be32 *p, int *buflen)
1da177e4
LT		 2484{
2485 struct svc_export *exp = cd->rd_fhp->fh_export;
2486 struct dentry *dentry;
b37ad28b 2487 __be32 nfserr;
406a7ea9 2488 int ignore_crossmnt = 0;
1da177e4
LT		 2489
2490 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2491 if (IS_ERR(dentry))
2492 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2493 if (!dentry->d_inode) {
2494 /*
2495 * nfsd_buffered_readdir drops the i_mutex between
2496 * readdir and calling this callback, leaving a window
2497 * where this directory entry could have gone away.
2498 */
2499 dput(dentry);
2500 return nfserr_noent;
2501 }
1da177e4
LT		 2502
2503 exp_get(exp);
406a7ea9
FF		 2504 /*
2505 * In the case of a mountpoint, the client may be asking for
2506 * attributes that are only properties of the underlying filesystem
2507 * as opposed to the cross-mounted file system. In such a case,
2508 * we will not follow the cross mount and will fill the attribtutes
2509 * directly from the mountpoint dentry.
2510 */
3227fa41 2511 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2512 int err;
2513
3227fa41
BF		 2514 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2515 && !attributes_need_mount(cd->rd_bmval)) {
2516 ignore_crossmnt = 1;
2517 goto out_encode;
2518 }
dcb488a3
AA		 2519 /*
2520 * Why the heck aren't we just using nfsd_lookup??
2521 * Different "."/".." handling? Something else?
2522 * At least, add a comment here to explain....
2523 */
021d3a72
BF		 2524 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2525 if (err) {
2526 nfserr = nfserrno(err);
1da177e4
LT		 2527 goto out_put;
2528 }
dcb488a3
AA		 2529 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2530 if (nfserr)
2531 goto out_put;
1da177e4
LT		 2532
2533 }
3227fa41 2534out_encode:
1da177e4 2535 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 2536 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2537out_put:
2538 dput(dentry);
2539 exp_put(exp);
2540 return nfserr;
2541}
2542
2ebbc012 2543static __be32 *
b37ad28b 2544nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2545{
2ebbc012 2546 __be32 *attrlenp;
1da177e4
LT		 2547
2548 if (buflen < 6)
2549 return NULL;
2550 *p++ = htonl(2);
2551 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2552 *p++ = htonl(0); /* bmval1 */
2553
2554 attrlenp = p++;
2555 *p++ = nfserr; /* no htonl */
2556 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2557 return p;
2558}
2559
2560static int
a0ad13ef
N		 2561nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2562 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2563{
a0ad13ef 2564 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2565 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2566 int buflen;
2ebbc012 2567 __be32 *p = cd->buffer;
b2c0cea6 2568 __be32 *cookiep;
b37ad28b 2569 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2570
2571 /* In nfsv4, "." and ".." never make it onto the wire.. */
2572 if (name && isdotent(name, namlen)) {
2573 cd->common.err = nfs_ok;
2574 return 0;
2575 }
2576
2577 if (cd->offset)
2578 xdr_encode_hyper(cd->offset, (u64) offset);
2579
2580 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2581 if (buflen < 0)
2582 goto fail;
2583
2584 *p++ = xdr_one; /* mark entry present */
b2c0cea6 2585 cookiep = p;
1da177e4
LT		 2586 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2587 p = xdr_encode_array(p, name, namlen); /* name length & name */
2588
2589 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2590 switch (nfserr) {
2591 case nfs_ok:
2592 p += buflen;
2593 break;
2594 case nfserr_resource:
2595 nfserr = nfserr_toosmall;
2596 goto fail;
b2c0cea6
BF		 2597 case nfserr_noent:
2598 goto skip_entry;
1da177e4
LT		 2599 default:
2600 /*
2601 * If the client requested the RDATTR_ERROR attribute,
2602 * we stuff the error code into this attribute
2603 * and continue. If this attribute was not requested,
2604 * then in accordance with the spec, we fail the
2605 * entire READDIR operation(!)
2606 */
2607 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2608 goto fail;
1da177e4 2609 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2610 if (p == NULL) {
2611 nfserr = nfserr_toosmall;
1da177e4 2612 goto fail;
34081efc 2613 }
1da177e4
LT		 2614 }
2615 cd->buflen -= (p - cd->buffer);
2616 cd->buffer = p;
b2c0cea6
BF		 2617 cd->offset = cookiep;
2618skip_entry:
1da177e4
LT		 2619 cd->common.err = nfs_ok;
2620 return 0;
2621fail:
2622 cd->common.err = nfserr;
2623 return -EINVAL;
2624}
2625
e2f282b9
BH		 2626static void
2627nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2628{
bc749ca4 2629 __be32 *p;
e2f282b9
BH		 2630
2631 RESERVE_SPACE(sizeof(stateid_t));
2632 WRITE32(sid->si_generation);
2633 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2634 ADJUST_ARGS();
2635}
2636
695e12f8 2637static __be32
b37ad28b 2638nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2639{
bc749ca4 2640 __be32 *p;
1da177e4
LT		 2641
2642 if (!nfserr) {
2643 RESERVE_SPACE(8);
2644 WRITE32(access->ac_supported);
2645 WRITE32(access->ac_resp_access);
2646 ADJUST_ARGS();
2647 }
695e12f8 2648 return nfserr;
1da177e4
LT		 2649}
2650
1d1bc8f2
BF		 2651static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2652{
2653 __be32 *p;
2654
2655 if (!nfserr) {
2656 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2657 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2658 WRITE32(bcts->dir);
6e67b5d1 2659 /* Sorry, we do not yet support RDMA over 4.1: */
1d1bc8f2
BF		 2660 WRITE32(0);
2661 ADJUST_ARGS();
2662 }
2663 return nfserr;
2664}
2665
695e12f8 2666static __be32
b37ad28b 2667nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4
LT		 2668{
2669 ENCODE_SEQID_OP_HEAD;
2670
e2f282b9
BH		 2671 if (!nfserr)
2672 nfsd4_encode_stateid(resp, &close->cl_stateid);
2673
f3e42237 2674 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2675 return nfserr;
1da177e4
LT		 2676}
2677
2678
695e12f8 2679static __be32
b37ad28b 2680nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2681{
bc749ca4 2682 __be32 *p;
1da177e4
LT		 2683
2684 if (!nfserr) {
ab4684d1
CL		 2685 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
2686 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 2687 ADJUST_ARGS();
2688 }
695e12f8 2689 return nfserr;
1da177e4
LT		 2690}
2691
695e12f8 2692static __be32
b37ad28b 2693nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2694{
bc749ca4 2695 __be32 *p;
1da177e4
LT		 2696
2697 if (!nfserr) {
2698 RESERVE_SPACE(32);
c654b8a9 2699 write_cinfo(&p, &create->cr_cinfo);
1da177e4
LT		 2700 WRITE32(2);
2701 WRITE32(create->cr_bmval[0]);
2702 WRITE32(create->cr_bmval[1]);
2703 ADJUST_ARGS();
2704 }
695e12f8 2705 return nfserr;
1da177e4
LT		 2706}
2707
b37ad28b
AV		 2708static __be32
2709nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2710{
2711 struct svc_fh *fhp = getattr->ga_fhp;
2712 int buflen;
2713
2714 if (nfserr)
2715 return nfserr;
2716
2717 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2718 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2719 resp->p, &buflen, getattr->ga_bmval,
406a7ea9 2720 resp->rqstp, 0);
1da177e4
LT		 2721 if (!nfserr)
2722 resp->p += buflen;
2723 return nfserr;
2724}
2725
695e12f8
BH		 2726static __be32
2727nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2728{
695e12f8 2729 struct svc_fh *fhp = *fhpp;
1da177e4 2730 unsigned int len;
bc749ca4 2731 __be32 *p;
1da177e4
LT		 2732
2733 if (!nfserr) {
2734 len = fhp->fh_handle.fh_size;
2735 RESERVE_SPACE(len + 4);
2736 WRITE32(len);
2737 WRITEMEM(&fhp->fh_handle.fh_base, len);
2738 ADJUST_ARGS();
2739 }
695e12f8 2740 return nfserr;
1da177e4
LT		 2741}
2742
2743/*
2744* Including all fields other than the name, a LOCK4denied structure requires
2745* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2746*/
2747static void
2748nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2749{
7c13f344 2750 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2751 __be32 *p;
1da177e4 2752
7c13f344 2753 RESERVE_SPACE(32 + XDR_LEN(conf->len));
1da177e4
LT		 2754 WRITE64(ld->ld_start);
2755 WRITE64(ld->ld_length);
2756 WRITE32(ld->ld_type);
7c13f344 2757 if (conf->len) {
1da177e4 2758 WRITEMEM(&ld->ld_clientid, 8);
7c13f344
BF		 2759 WRITE32(conf->len);
2760 WRITEMEM(conf->data, conf->len);
2761 kfree(conf->data);
1da177e4
LT		 2762 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2763 WRITE64((u64)0); /* clientid */
2764 WRITE32(0); /* length of owner name */
2765 }
2766 ADJUST_ARGS();
2767}
2768
695e12f8 2769static __be32
b37ad28b 2770nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2771{
1da177e4
LT		 2772 ENCODE_SEQID_OP_HEAD;
2773
e2f282b9
BH		 2774 if (!nfserr)
2775 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2776 else if (nfserr == nfserr_denied)
1da177e4
LT		 2777 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2778
f3e42237 2779 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2780 return nfserr;
1da177e4
LT		 2781}
2782
695e12f8 2783static __be32
b37ad28b 2784nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2785{
2786 if (nfserr == nfserr_denied)
2787 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2788 return nfserr;
1da177e4
LT		 2789}
2790
695e12f8 2791static __be32
b37ad28b 2792nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4
LT		 2793{
2794 ENCODE_SEQID_OP_HEAD;
2795
e2f282b9
BH		 2796 if (!nfserr)
2797 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2798
f3e42237 2799 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2800 return nfserr;
1da177e4
LT		 2801}
2802
2803
695e12f8 2804static __be32
b37ad28b 2805nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2806{
bc749ca4 2807 __be32 *p;
1da177e4
LT		 2808
2809 if (!nfserr) {
2810 RESERVE_SPACE(20);
c654b8a9 2811 write_cinfo(&p, &link->li_cinfo);
1da177e4
LT		 2812 ADJUST_ARGS();
2813 }
695e12f8 2814 return nfserr;
1da177e4
LT		 2815}
2816
2817
695e12f8 2818static __be32
b37ad28b 2819nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2820{
bc749ca4 2821 __be32 *p;
1da177e4
LT		 2822 ENCODE_SEQID_OP_HEAD;
2823
2824 if (nfserr)
2825 goto out;
2826
e2f282b9
BH		 2827 nfsd4_encode_stateid(resp, &open->op_stateid);
2828 RESERVE_SPACE(40);
c654b8a9 2829 write_cinfo(&p, &open->op_cinfo);
1da177e4
LT		 2830 WRITE32(open->op_rflags);
2831 WRITE32(2);
2832 WRITE32(open->op_bmval[0]);
2833 WRITE32(open->op_bmval[1]);
2834 WRITE32(open->op_delegate_type);
2835 ADJUST_ARGS();
2836
2837 switch (open->op_delegate_type) {
2838 case NFS4_OPEN_DELEGATE_NONE:
2839 break;
2840 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2841 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2842 RESERVE_SPACE(20);
7b190fec 2843 WRITE32(open->op_recall);
1da177e4
LT		 2844
2845 /*
2846 * TODO: ACE's in delegations
2847 */
2848 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2849 WRITE32(0);
2850 WRITE32(0);
2851 WRITE32(0); /* XXX: is NULL principal ok? */
2852 ADJUST_ARGS();
2853 break;
2854 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2855 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2856 RESERVE_SPACE(32);
1da177e4
LT		 2857 WRITE32(0);
2858
2859 /*
2860 * TODO: space_limit's in delegations
2861 */
2862 WRITE32(NFS4_LIMIT_SIZE);
2863 WRITE32(~(u32)0);
2864 WRITE32(~(u32)0);
2865
2866 /*
2867 * TODO: ACE's in delegations
2868 */
2869 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2870 WRITE32(0);
2871 WRITE32(0);
2872 WRITE32(0); /* XXX: is NULL principal ok? */
2873 ADJUST_ARGS();
2874 break;
d24433cd
BH		 2875 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
2876 switch (open->op_why_no_deleg) {
2877 case WND4_CONTENTION:
2878 case WND4_RESOURCE:
2879 RESERVE_SPACE(8);
2880 WRITE32(open->op_why_no_deleg);
2881 WRITE32(0); /* deleg signaling not supported yet */
2882 break;
2883 default:
2884 RESERVE_SPACE(4);
2885 WRITE32(open->op_why_no_deleg);
2886 }
2887 ADJUST_ARGS();
2888 break;
1da177e4
LT		 2889 default:
2890 BUG();
2891 }
2892 /* XXX save filehandle here */
2893out:
f3e42237 2894 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2895 return nfserr;
1da177e4
LT		 2896}
2897
695e12f8 2898static __be32
b37ad28b 2899nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4
LT		 2900{
2901 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2902
2903 if (!nfserr)
2904 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4 2905
f3e42237 2906 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2907 return nfserr;
1da177e4
LT		 2908}
2909
695e12f8 2910static __be32
b37ad28b 2911nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4
LT		 2912{
2913 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2914
2915 if (!nfserr)
2916 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4 2917
f3e42237 2918 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2919 return nfserr;
1da177e4
LT		 2920}
2921
b37ad28b
AV		 2922static __be32
2923nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2924 struct nfsd4_read *read)
1da177e4
LT		 2925{
2926 u32 eof;
2927 int v, pn;
2928 unsigned long maxcount;
2929 long len;
bc749ca4 2930 __be32 *p;
1da177e4
LT		 2931
2932 if (nfserr)
2933 return nfserr;
2934 if (resp->xbuf->page_len)
2935 return nfserr_resource;
2936
2937 RESERVE_SPACE(8); /* eof flag and byte count */
2938
7adae489 2939 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2940 if (maxcount > read->rd_length)
2941 maxcount = read->rd_length;
2942
2943 len = maxcount;
2944 v = 0;
2945 while (len > 0) {
44524359 2946 pn = resp->rqstp->rq_resused++;
3cc03b16 2947 resp->rqstp->rq_vec[v].iov_base =
44524359 2948 page_address(resp->rqstp->rq_respages[pn]);
3cc03b16 2949 resp->rqstp->rq_vec[v].iov_len =
44524359 2950 len < PAGE_SIZE ? len : PAGE_SIZE;
1da177e4
LT		 2951 v++;
2952 len -= PAGE_SIZE;
2953 }
2954 read->rd_vlen = v;
2955
039a87ca 2956 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2957 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2958 &maxcount);
2959
1da177e4
LT		 2960 if (nfserr)
2961 return nfserr;
44524359
N		 2962 eof = (read->rd_offset + maxcount >=
2963 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2964
2965 WRITE32(eof);
2966 WRITE32(maxcount);
2967 ADJUST_ARGS();
6ed6decc
N		 2968 resp->xbuf->head[0].iov_len = (char*)p
2969 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2970 resp->xbuf->page_len = maxcount;
2971
6ed6decc 2972 /* Use rest of head for padding and remaining ops: */
6ed6decc 2973 resp->xbuf->tail[0].iov_base = p;
1da177e4 2974 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2975 if (maxcount&3) {
6ed6decc
N		 2976 RESERVE_SPACE(4);
2977 WRITE32(0);
1da177e4
LT		 2978 resp->xbuf->tail[0].iov_base += maxcount&3;
2979 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2980 ADJUST_ARGS();
1da177e4
LT		 2981 }
2982 return 0;
2983}
2984
b37ad28b
AV		 2985static __be32
2986nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 2987{
2988 int maxcount;
2989 char *page;
bc749ca4 2990 __be32 *p;
1da177e4
LT		 2991
2992 if (nfserr)
2993 return nfserr;
2994 if (resp->xbuf->page_len)
2995 return nfserr_resource;
2996
44524359 2997 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2998
2999 maxcount = PAGE_SIZE;
3000 RESERVE_SPACE(4);
3001
3002 /*
3003 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3004 * if they would overflow the buffer. Is this kosher in NFSv4? If
3005 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3006 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3007 */
3008 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
3009 if (nfserr == nfserr_isdir)
3010 return nfserr_inval;
3011 if (nfserr)
3012 return nfserr;
3013
3014 WRITE32(maxcount);
3015 ADJUST_ARGS();
6ed6decc
N		 3016 resp->xbuf->head[0].iov_len = (char*)p
3017 - (char*)resp->xbuf->head[0].iov_base;
3018 resp->xbuf->page_len = maxcount;
1da177e4 3019
6ed6decc 3020 /* Use rest of head for padding and remaining ops: */
6ed6decc 3021 resp->xbuf->tail[0].iov_base = p;
1da177e4 3022 resp->xbuf->tail[0].iov_len = 0;
1da177e4 3023 if (maxcount&3) {
6ed6decc
N		 3024 RESERVE_SPACE(4);
3025 WRITE32(0);
1da177e4
LT		 3026 resp->xbuf->tail[0].iov_base += maxcount&3;
3027 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 3028 ADJUST_ARGS();
1da177e4
LT		 3029 }
3030 return 0;
3031}
3032
b37ad28b
AV		 3033static __be32
3034nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3035{
3036 int maxcount;
3037 loff_t offset;
2ebbc012 3038 __be32 *page, *savep, *tailbase;
bc749ca4 3039 __be32 *p;
1da177e4
LT		 3040
3041 if (nfserr)
3042 return nfserr;
3043 if (resp->xbuf->page_len)
3044 return nfserr_resource;
3045
ab4684d1 3046 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
1da177e4
LT		 3047 savep = p;
3048
3049 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3050 WRITE32(0);
3051 WRITE32(0);
3052 ADJUST_ARGS();
3053 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 3054 tailbase = p;
1da177e4
LT		 3055
3056 maxcount = PAGE_SIZE;
3057 if (maxcount > readdir->rd_maxcount)
3058 maxcount = readdir->rd_maxcount;
3059
3060 /*
3061 * Convert from bytes to words, account for the two words already
3062 * written, make sure to leave two words at the end for the next
3063 * pointer and eof field.
3064 */
3065 maxcount = (maxcount >> 2) - 4;
3066 if (maxcount < 0) {
3067 nfserr = nfserr_toosmall;
3068 goto err_no_verf;
3069 }
3070
44524359 3071 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 3072 readdir->common.err = 0;
3073 readdir->buflen = maxcount;
3074 readdir->buffer = page;
3075 readdir->offset = NULL;
3076
3077 offset = readdir->rd_cookie;
3078 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3079 &offset,
3080 &readdir->common, nfsd4_encode_dirent);
3081 if (nfserr == nfs_ok &&
3082 readdir->common.err == nfserr_toosmall &&
3083 readdir->buffer == page)
3084 nfserr = nfserr_toosmall;
1da177e4
LT		 3085 if (nfserr)
3086 goto err_no_verf;
3087
3088 if (readdir->offset)
3089 xdr_encode_hyper(readdir->offset, offset);
3090
3091 p = readdir->buffer;
3092 *p++ = 0; /* no more entries */
3093 *p++ = htonl(readdir->common.err == nfserr_eof);
44524359
N		 3094 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
3095 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
1da177e4 3096
bb6e8a9f 3097 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 3098 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 3099 resp->xbuf->tail[0].iov_len = 0;
3100 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 3101 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 3102
3103 return 0;
3104err_no_verf:
3105 p = savep;
3106 ADJUST_ARGS();
3107 return nfserr;
3108}
3109
695e12f8 3110static __be32
b37ad28b 3111nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3112{
bc749ca4 3113 __be32 *p;
1da177e4
LT		 3114
3115 if (!nfserr) {
3116 RESERVE_SPACE(20);
c654b8a9 3117 write_cinfo(&p, &remove->rm_cinfo);
1da177e4
LT		 3118 ADJUST_ARGS();
3119 }
695e12f8 3120 return nfserr;
1da177e4
LT		 3121}
3122
695e12f8 3123static __be32
b37ad28b 3124nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3125{
bc749ca4 3126 __be32 *p;
1da177e4
LT		 3127
3128 if (!nfserr) {
3129 RESERVE_SPACE(40);
c654b8a9
BF		 3130 write_cinfo(&p, &rename->rn_sinfo);
3131 write_cinfo(&p, &rename->rn_tinfo);
1da177e4
LT		 3132 ADJUST_ARGS();
3133 }
695e12f8 3134 return nfserr;
1da177e4
LT		 3135}
3136
695e12f8 3137static __be32
22b6dee8
MJ		 3138nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
3139 __be32 nfserr,struct svc_export *exp)
dcb488a3
AA		 3140{
3141 int i = 0;
4796f457
BF		 3142 u32 nflavs;
3143 struct exp_flavor_info *flavs;
3144 struct exp_flavor_info def_flavs[2];
bc749ca4 3145 __be32 *p;
dcb488a3
AA		 3146
3147 if (nfserr)
3148 goto out;
4796f457
BF		 3149 if (exp->ex_nflavors) {
3150 flavs = exp->ex_flavors;
3151 nflavs = exp->ex_nflavors;
3152 } else { /* Handling of some defaults in absence of real secinfo: */
3153 flavs = def_flavs;
3154 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3155 nflavs = 2;
3156 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3157 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3158 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3159 nflavs = 1;
3160 flavs[0].pseudoflavor
3161 = svcauth_gss_flavor(exp->ex_client);
3162 } else {
3163 nflavs = 1;
3164 flavs[0].pseudoflavor
3165 = exp->ex_client->flavour->flavour;
3166 }
3167 }
3168
dcb488a3 3169 RESERVE_SPACE(4);
4796f457 3170 WRITE32(nflavs);
dcb488a3 3171 ADJUST_ARGS();
4796f457
BF		 3172 for (i = 0; i < nflavs; i++) {
3173 u32 flav = flavs[i].pseudoflavor;
dcb488a3
AA		 3174 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
3175
3176 if (gm) {
3177 RESERVE_SPACE(4);
3178 WRITE32(RPC_AUTH_GSS);
3179 ADJUST_ARGS();
3180 RESERVE_SPACE(4 + gm->gm_oid.len);
3181 WRITE32(gm->gm_oid.len);
3182 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
3183 ADJUST_ARGS();
3184 RESERVE_SPACE(4);
3185 WRITE32(0); /* qop */
3186 ADJUST_ARGS();
3187 RESERVE_SPACE(4);
3188 WRITE32(gss_pseudoflavor_to_service(gm, flav));
3189 ADJUST_ARGS();
3190 gss_mech_put(gm);
3191 } else {
3192 RESERVE_SPACE(4);
3193 WRITE32(flav);
3194 ADJUST_ARGS();
3195 }
3196 }
3197out:
3198 if (exp)
3199 exp_put(exp);
695e12f8 3200 return nfserr;
dcb488a3
AA		 3201}
3202
22b6dee8
MJ		 3203static __be32
3204nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3205 struct nfsd4_secinfo *secinfo)
3206{
3207 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3208}
3209
3210static __be32
3211nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3212 struct nfsd4_secinfo_no_name *secinfo)
3213{
3214 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3215}
3216
1da177e4
LT		 3217/*
3218 * The SETATTR encode routine is special -- it always encodes a bitmap,
3219 * regardless of the error status.
3220 */
695e12f8 3221static __be32
b37ad28b 3222nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3223{
bc749ca4 3224 __be32 *p;
1da177e4
LT		 3225
3226 RESERVE_SPACE(12);
3227 if (nfserr) {
3228 WRITE32(2);
3229 WRITE32(0);
3230 WRITE32(0);
3231 }
3232 else {
3233 WRITE32(2);
3234 WRITE32(setattr->sa_bmval[0]);
3235 WRITE32(setattr->sa_bmval[1]);
3236 }
3237 ADJUST_ARGS();
695e12f8 3238 return nfserr;
1da177e4
LT		 3239}
3240
695e12f8 3241static __be32
b37ad28b 3242nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3243{
bc749ca4 3244 __be32 *p;
1da177e4
LT		 3245
3246 if (!nfserr) {
ab4684d1 3247 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE);
1da177e4 3248 WRITEMEM(&scd->se_clientid, 8);
ab4684d1 3249 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3250 ADJUST_ARGS();
3251 }
3252 else if (nfserr == nfserr_clid_inuse) {
3253 RESERVE_SPACE(8);
3254 WRITE32(0);
3255 WRITE32(0);
3256 ADJUST_ARGS();
3257 }
695e12f8 3258 return nfserr;
1da177e4
LT		 3259}
3260
695e12f8 3261static __be32
b37ad28b 3262nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3263{
bc749ca4 3264 __be32 *p;
1da177e4
LT		 3265
3266 if (!nfserr) {
3267 RESERVE_SPACE(16);
3268 WRITE32(write->wr_bytes_written);
3269 WRITE32(write->wr_how_written);
ab4684d1 3270 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3271 ADJUST_ARGS();
3272 }
695e12f8 3273 return nfserr;
1da177e4
LT		 3274}
3275
2db134eb 3276static __be32
57b7b43b 3277nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3278 struct nfsd4_exchange_id *exid)
3279{
bc749ca4 3280 __be32 *p;
0733d213
AA		 3281 char *major_id;
3282 char *server_scope;
3283 int major_id_sz;
3284 int server_scope_sz;
3285 uint64_t minor_id = 0;
3286
3287 if (nfserr)
3288 return nfserr;
3289
3290 major_id = utsname()->nodename;
3291 major_id_sz = strlen(major_id);
3292 server_scope = utsname()->nodename;
3293 server_scope_sz = strlen(server_scope);
3294
3295 RESERVE_SPACE(
3296 8 /* eir_clientid */ +
3297 4 /* eir_sequenceid */ +
3298 4 /* eir_flags */ +
3299 4 /* spr_how (SP4_NONE) */ +
3300 8 /* so_minor_id */ +
3301 4 /* so_major_id.len */ +
3302 (XDR_QUADLEN(major_id_sz) * 4) +
3303 4 /* eir_server_scope.len */ +
3304 (XDR_QUADLEN(server_scope_sz) * 4) +
3305 4 /* eir_server_impl_id.count (0) */);
3306
3307 WRITEMEM(&exid->clientid, 8);
3308 WRITE32(exid->seqid);
3309 WRITE32(exid->flags);
3310
3311 /* state_protect4_r. Currently only support SP4_NONE */
3312 BUG_ON(exid->spa_how != SP4_NONE);
3313 WRITE32(exid->spa_how);
3314
3315 /* The server_owner struct */
3316 WRITE64(minor_id); /* Minor id */
3317 /* major id */
3318 WRITE32(major_id_sz);
3319 WRITEMEM(major_id, major_id_sz);
3320
3321 /* Server scope */
3322 WRITE32(server_scope_sz);
3323 WRITEMEM(server_scope, server_scope_sz);
3324
3325 /* Implementation id */
3326 WRITE32(0); /* zero length nfs_impl_id4 array */
3327 ADJUST_ARGS();
3328 return 0;
2db134eb
AA		 3329}
3330
3331static __be32
57b7b43b 3332nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3333 struct nfsd4_create_session *sess)
3334{
bc749ca4 3335 __be32 *p;
ec6b5d7b
AA		 3336
3337 if (nfserr)
3338 return nfserr;
3339
3340 RESERVE_SPACE(24);
3341 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3342 WRITE32(sess->seqid);
3343 WRITE32(sess->flags);
3344 ADJUST_ARGS();
3345
3346 RESERVE_SPACE(28);
3347 WRITE32(0); /* headerpadsz */
3348 WRITE32(sess->fore_channel.maxreq_sz);
3349 WRITE32(sess->fore_channel.maxresp_sz);
3350 WRITE32(sess->fore_channel.maxresp_cached);
3351 WRITE32(sess->fore_channel.maxops);
3352 WRITE32(sess->fore_channel.maxreqs);
3353 WRITE32(sess->fore_channel.nr_rdma_attrs);
3354 ADJUST_ARGS();
3355
3356 if (sess->fore_channel.nr_rdma_attrs) {
3357 RESERVE_SPACE(4);
3358 WRITE32(sess->fore_channel.rdma_attrs);
3359 ADJUST_ARGS();
3360 }
3361
3362 RESERVE_SPACE(28);
3363 WRITE32(0); /* headerpadsz */
3364 WRITE32(sess->back_channel.maxreq_sz);
3365 WRITE32(sess->back_channel.maxresp_sz);
3366 WRITE32(sess->back_channel.maxresp_cached);
3367 WRITE32(sess->back_channel.maxops);
3368 WRITE32(sess->back_channel.maxreqs);
3369 WRITE32(sess->back_channel.nr_rdma_attrs);
3370 ADJUST_ARGS();
3371
3372 if (sess->back_channel.nr_rdma_attrs) {
3373 RESERVE_SPACE(4);
3374 WRITE32(sess->back_channel.rdma_attrs);
3375 ADJUST_ARGS();
3376 }
3377 return 0;
2db134eb
AA		 3378}
3379
3380static __be32
57b7b43b 3381nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3382 struct nfsd4_destroy_session *destroy_session)
3383{
2db134eb
AA		 3384 return nfserr;
3385}
3386
e1ca12df 3387static __be32
d1829b38 3388nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
e1ca12df
BS		 3389 struct nfsd4_free_stateid *free_stateid)
3390{
3391 __be32 *p;
3392
3393 if (nfserr)
3394 return nfserr;
3395
3396 RESERVE_SPACE(4);
d1829b38 3397 *p++ = nfserr;
e1ca12df
BS		 3398 ADJUST_ARGS();
3399 return nfserr;
3400}
3401
c47d832b 3402static __be32
57b7b43b 3403nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3404 struct nfsd4_sequence *seq)
3405{
bc749ca4 3406 __be32 *p;
b85d4c01
BH		 3407
3408 if (nfserr)
3409 return nfserr;
3410
3411 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3412 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3413 WRITE32(seq->seqid);
3414 WRITE32(seq->slotid);
b7d7ca35
BF		 3415 /* Note slotid's are numbered from zero: */
3416 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3417 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
0d7bb719 3418 WRITE32(seq->status_flags);
b85d4c01
BH		 3419
3420 ADJUST_ARGS();
557ce264 3421 resp->cstate.datap = p; /* DRC cache data pointer */
b85d4c01 3422 return 0;
2db134eb
AA		 3423}
3424
2355c596 3425static __be32
57b7b43b 3426nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3427 struct nfsd4_test_stateid *test_stateid)
3428{
03cfb420 3429 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3430 __be32 *p;
17456804 3431
03cfb420 3432 RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
17456804 3433 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3434
03cfb420 3435 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3436 *p++ = stateid->ts_id_status;
17456804 3437 }
17456804 3438
03cfb420 3439 ADJUST_ARGS();
17456804
BS		 3440 return nfserr;
3441}
3442
695e12f8
BH		 3443static __be32
3444nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3445{
3446 return nfserr;
3447}
3448
3449typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3450
2db134eb
AA		 3451/*
3452 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3453 * since we don't need to filter out obsolete ops as this is
3454 * done in the decoding phase.
3455 */
695e12f8 3456static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3457 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3458 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3459 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3460 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3461 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3462 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3463 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3464 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3465 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3466 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3467 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3468 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3469 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3470 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3471 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3472 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3473 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3474 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3475 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3476 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3477 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3478 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3479 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3480 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3481 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3482 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3483 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3484 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3485 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3486 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3487 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3488 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3489 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3490 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3491 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3492 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3493 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3494
3495 /* NFSv4.1 operations */
3496 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3497 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3498 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3499 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3500 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
e1ca12df 3501 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
2db134eb
AA		 3502 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3503 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3504 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3505 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3506 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3507 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3508 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3509 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3510 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3511 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3512 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3513 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3514 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3515};
3516
496c262c
AA		 3517/*
3518 * Calculate the total amount of memory that the compound response has taken
58e7b33a 3519 * after encoding the current operation with pad.
496c262c 3520 *
58e7b33a
MJ		 3521 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3522 * which was specified at nfsd4_operation, else pad is zero.
496c262c 3523 *
58e7b33a 3524 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
496c262c
AA		 3525 *
3526 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3527 * will be at least a page and will therefore hold the xdr_buf head.
3528 */
57b7b43b 3529__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
496c262c 3530{
496c262c 3531 struct xdr_buf *xb = &resp->rqstp->rq_res;
496c262c
AA		 3532 struct nfsd4_session *session = NULL;
3533 struct nfsd4_slot *slot = resp->cstate.slot;
58e7b33a 3534 u32 length, tlen = 0;
496c262c
AA		 3535
3536 if (!nfsd4_has_session(&resp->cstate))
58e7b33a 3537 return 0;
496c262c
AA		 3538
3539 session = resp->cstate.session;
58e7b33a
MJ		 3540 if (session == NULL)
3541 return 0;
496c262c
AA		 3542
3543 if (xb->page_len == 0) {
3544 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3545 } else {
3546 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3547 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3548
3549 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3550 }
3551 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3552 length, xb->page_len, tlen, pad);
3553
58e7b33a
MJ		 3554 if (length > session->se_fchannel.maxresp_sz)
3555 return nfserr_rep_too_big;
3556
73e79482 3557 if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
58e7b33a 3558 length > session->se_fchannel.maxresp_cached)
496c262c 3559 return nfserr_rep_too_big_to_cache;
58e7b33a
MJ		 3560
3561 return 0;
496c262c
AA		 3562}
3563
1da177e4
LT		 3564void
3565nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3566{
2ebbc012 3567 __be32 *statp;
bc749ca4 3568 __be32 *p;
1da177e4
LT		 3569
3570 RESERVE_SPACE(8);
3571 WRITE32(op->opnum);
3572 statp = p++; /* to be backfilled at the end */
3573 ADJUST_ARGS();
3574
695e12f8
BH		 3575 if (op->opnum == OP_ILLEGAL)
3576 goto status;
3577 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3578 !nfsd4_enc_ops[op->opnum]);
3579 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
496c262c 3580 /* nfsd4_check_drc_limit guarantees enough room for error status */
58e7b33a
MJ		 3581 if (!op->status)
3582 op->status = nfsd4_check_resp_size(resp, 0);
695e12f8 3583status:
1da177e4
LT		 3584 /*
3585 * Note: We write the status directly, instead of using WRITE32(),
3586 * since it is already in network byte order.
3587 */
3588 *statp = op->status;
3589}
3590
3591/*
3592 * Encode the reply stored in the stateowner reply cache
3593 *
3594 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3595 * previously sent already encoded operation.
3596 *
3597 * called with nfs4_lock_state() held
3598 */
3599void
3600nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3601{
bc749ca4 3602 __be32 *p;
1da177e4
LT		 3603 struct nfs4_replay *rp = op->replay;
3604
3605 BUG_ON(!rp);
3606
3607 RESERVE_SPACE(8);
3608 WRITE32(op->opnum);
3609 *p++ = rp->rp_status; /* already xdr'ed */
3610 ADJUST_ARGS();
3611
3612 RESERVE_SPACE(rp->rp_buflen);
3613 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3614 ADJUST_ARGS();
3615}
3616
1da177e4 3617int
2ebbc012 3618nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3619{
3620 return xdr_ressize_check(rqstp, p);
3621}
3622
3e98abff 3623int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3624{
3e98abff
BF		 3625 struct svc_rqst *rqstp = rq;
3626 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3627
1da177e4
LT		 3628 if (args->ops != args->iops) {
3629 kfree(args->ops);
3630 args->ops = args->iops;
3631 }
f99d49ad
JJ		 3632 kfree(args->tmpp);
3633 args->tmpp = NULL;
1da177e4
LT		 3634 while (args->to_free) {
3635 struct tmpbuf *tb = args->to_free;
3636 args->to_free = tb->next;
3637 tb->release(tb->buf);
3638 kfree(tb);
3639 }
3e98abff 3640 return 1;
1da177e4
LT		 3641}
3642
3643int
2ebbc012 3644nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3645{
1da177e4
LT		 3646 args->p = p;
3647 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3648 args->pagelist = rqstp->rq_arg.pages;
3649 args->pagelen = rqstp->rq_arg.page_len;
3650 args->tmpp = NULL;
3651 args->to_free = NULL;
3652 args->ops = args->iops;
3653 args->rqstp = rqstp;
3654
3e98abff 3655 return !nfsd4_decode_compound(args);
1da177e4
LT		 3656}
3657
3658int
2ebbc012 3659nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3660{
3661 /*
3662 * All that remains is to write the tag and operation count...
3663 */
557ce264 3664 struct nfsd4_compound_state *cs = &resp->cstate;
1da177e4
LT		 3665 struct kvec *iov;
3666 p = resp->tagp;
3667 *p++ = htonl(resp->taglen);
3668 memcpy(p, resp->tag, resp->taglen);
3669 p += XDR_QUADLEN(resp->taglen);
3670 *p++ = htonl(resp->opcnt);
3671
3672 if (rqstp->rq_res.page_len)
3673 iov = &rqstp->rq_res.tail[0];
3674 else
3675 iov = &rqstp->rq_res.head[0];
3676 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3677 BUG_ON(iov->iov_len > PAGE_SIZE);
26c0c75e
BF		 3678 if (nfsd4_has_session(cs)) {
3679 if (cs->status != nfserr_replay_cache) {
3680 nfsd4_store_cache_entry(resp);
73e79482 3681 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 3682 }
d7682988
BH		 3683 /* Renew the clientid on success and on replay */
3684 release_session_client(cs->session);
76407f76 3685 nfsd4_put_session(cs->session);
da3846a2 3686 }
1da177e4
LT		 3687 return 1;
3688}
3689
3690/*
3691 * Local variables:
3692 * c-basic-offset: 8
3693 * End:
3694 */
Linux kernel - Deliverables
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