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nfsd4: move more write parameters into xdr argument
[linux-2.6-block.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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
70cc7f75 1142static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
5a80a54d
BF		 1143{
1144 int i = 1;
70cc7f75 1145 int buflen = write->wr_buflen;
5a80a54d 1146
70cc7f75
BF		 1147 vec[0].iov_base = write->wr_head.iov_base;
1148 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
5a80a54d
BF		 1149 buflen -= vec[0].iov_len;
1150
1151 while (buflen) {
70cc7f75 1152 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
5a80a54d
BF		 1153 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
1154 buflen -= vec[i].iov_len;
1155 i++;
1156 }
1157 return i;
1158}
1159
b37ad28b 1160static __be32
1da177e4
LT		 1161nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1162{
1163 int avail;
1da177e4
LT		 1164 int len;
1165 DECODE_HEAD;
1166
e31a1b66
BH		 1167 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1168 if (status)
1169 return status;
1170 READ_BUF(16);
1da177e4
LT		 1171 READ64(write->wr_offset);
1172 READ32(write->wr_stable_how);
1173 if (write->wr_stable_how > 2)
1174 goto xdr_error;
1175 READ32(write->wr_buflen);
1176
1177 /* Sorry .. no magic macros for this.. *
1178 * READ_BUF(write->wr_buflen);
1179 * SAVEMEM(write->wr_buf, write->wr_buflen);
1180 */
1181 avail = (char*)argp->end - (char*)argp->p;
1182 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1183 dprintk("NFSD: xdr error (%s:%d)\n",
1184 __FILE__, __LINE__);
1da177e4
LT		 1185 goto xdr_error;
1186 }
70cc7f75
BF		 1187 write->wr_head.iov_base = p;
1188 write->wr_head.iov_len = avail;
5a80a54d 1189 WARN_ON(avail != (XDR_QUADLEN(avail) << 2));
70cc7f75 1190 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1191
1192 len = XDR_QUADLEN(write->wr_buflen) << 2;
1193 if (len >= avail) {
1194 int pages;
1195
1196 len -= avail;
1197
1198 pages = len >> PAGE_SHIFT;
1199 argp->pagelist += pages;
1200 argp->pagelen -= pages * PAGE_SIZE;
1201 len -= pages * PAGE_SIZE;
1202
1203 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1204 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1205 }
5a80a54d 1206 argp->p += XDR_QUADLEN(len);
70cc7f75 1207 write->wr_vlen = fill_in_write_vector(argp->rqstp->rq_vec, write);
5a80a54d 1208 WARN_ON_ONCE(write->wr_vlen > ARRAY_SIZE(argp->rqstp->rq_vec));
1da177e4
LT		 1209
1210 DECODE_TAIL;
1211}
1212
b37ad28b 1213static __be32
1da177e4
LT		 1214nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1215{
1216 DECODE_HEAD;
1217
1218 READ_BUF(12);
1219 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1220 READ32(rlockowner->rl_owner.len);
1221 READ_BUF(rlockowner->rl_owner.len);
1222 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1223
60adfc50
AA		 1224 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1225 return nfserr_inval;
1da177e4
LT		 1226 DECODE_TAIL;
1227}
1228
2db134eb
AA		 1229static __be32
1230nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1231 struct nfsd4_exchange_id *exid)
2db134eb 1232{
5afa040b 1233 int dummy, tmp;
0733d213
AA		 1234 DECODE_HEAD;
1235
1236 READ_BUF(NFS4_VERIFIER_SIZE);
1237 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1238
a084daf5
BF		 1239 status = nfsd4_decode_opaque(argp, &exid->clname);
1240 if (status)
1241 return nfserr_bad_xdr;
0733d213
AA		 1242
1243 READ_BUF(4);
1244 READ32(exid->flags);
1245
1246 /* Ignore state_protect4_a */
1247 READ_BUF(4);
1248 READ32(exid->spa_how);
1249 switch (exid->spa_how) {
1250 case SP4_NONE:
1251 break;
1252 case SP4_MACH_CRED:
1253 /* spo_must_enforce */
1254 READ_BUF(4);
1255 READ32(dummy);
1256 READ_BUF(dummy * 4);
1257 p += dummy;
1258
1259 /* spo_must_allow */
1260 READ_BUF(4);
1261 READ32(dummy);
1262 READ_BUF(dummy * 4);
1263 p += dummy;
1264 break;
1265 case SP4_SSV:
1266 /* ssp_ops */
1267 READ_BUF(4);
1268 READ32(dummy);
1269 READ_BUF(dummy * 4);
1270 p += dummy;
1271
1272 READ_BUF(4);
1273 READ32(dummy);
1274 READ_BUF(dummy * 4);
1275 p += dummy;
1276
1277 /* ssp_hash_algs<> */
1278 READ_BUF(4);
5afa040b
MJ		 1279 READ32(tmp);
1280 while (tmp--) {
1281 READ_BUF(4);
1282 READ32(dummy);
1283 READ_BUF(dummy);
1284 p += XDR_QUADLEN(dummy);
1285 }
0733d213
AA		 1286
1287 /* ssp_encr_algs<> */
1288 READ_BUF(4);
5afa040b
MJ		 1289 READ32(tmp);
1290 while (tmp--) {
1291 READ_BUF(4);
1292 READ32(dummy);
1293 READ_BUF(dummy);
1294 p += XDR_QUADLEN(dummy);
1295 }
0733d213
AA		 1296
1297 /* ssp_window and ssp_num_gss_handles */
1298 READ_BUF(8);
1299 READ32(dummy);
1300 READ32(dummy);
1301 break;
1302 default:
1303 goto xdr_error;
1304 }
1305
1306 /* Ignore Implementation ID */
1307 READ_BUF(4); /* nfs_impl_id4 array length */
1308 READ32(dummy);
1309
1310 if (dummy > 1)
1311 goto xdr_error;
1312
1313 if (dummy == 1) {
1314 /* nii_domain */
1315 READ_BUF(4);
1316 READ32(dummy);
1317 READ_BUF(dummy);
1318 p += XDR_QUADLEN(dummy);
1319
1320 /* nii_name */
1321 READ_BUF(4);
1322 READ32(dummy);
1323 READ_BUF(dummy);
1324 p += XDR_QUADLEN(dummy);
1325
1326 /* nii_date */
1327 READ_BUF(12);
1328 p += 3;
1329 }
1330 DECODE_TAIL;
2db134eb
AA		 1331}
1332
1333static __be32
1334nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1335 struct nfsd4_create_session *sess)
1336{
ec6b5d7b 1337 DECODE_HEAD;
ec6b5d7b 1338 u32 dummy;
ec6b5d7b
AA		 1339
1340 READ_BUF(16);
1341 COPYMEM(&sess->clientid, 8);
1342 READ32(sess->seqid);
1343 READ32(sess->flags);
1344
1345 /* Fore channel attrs */
1346 READ_BUF(28);
1347 READ32(dummy); /* headerpadsz is always 0 */
1348 READ32(sess->fore_channel.maxreq_sz);
1349 READ32(sess->fore_channel.maxresp_sz);
1350 READ32(sess->fore_channel.maxresp_cached);
1351 READ32(sess->fore_channel.maxops);
1352 READ32(sess->fore_channel.maxreqs);
1353 READ32(sess->fore_channel.nr_rdma_attrs);
1354 if (sess->fore_channel.nr_rdma_attrs == 1) {
1355 READ_BUF(4);
1356 READ32(sess->fore_channel.rdma_attrs);
1357 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1358 dprintk("Too many fore channel attr bitmaps!\n");
1359 goto xdr_error;
1360 }
1361
1362 /* Back channel attrs */
1363 READ_BUF(28);
1364 READ32(dummy); /* headerpadsz is always 0 */
1365 READ32(sess->back_channel.maxreq_sz);
1366 READ32(sess->back_channel.maxresp_sz);
1367 READ32(sess->back_channel.maxresp_cached);
1368 READ32(sess->back_channel.maxops);
1369 READ32(sess->back_channel.maxreqs);
1370 READ32(sess->back_channel.nr_rdma_attrs);
1371 if (sess->back_channel.nr_rdma_attrs == 1) {
1372 READ_BUF(4);
1373 READ32(sess->back_channel.rdma_attrs);
1374 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1375 dprintk("Too many back channel attr bitmaps!\n");
1376 goto xdr_error;
1377 }
1378
acb2887e 1379 READ_BUF(4);
ec6b5d7b 1380 READ32(sess->callback_prog);
acb2887e 1381 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1382 DECODE_TAIL;
2db134eb
AA		 1383}
1384
1385static __be32
1386nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1387 struct nfsd4_destroy_session *destroy_session)
1388{
e10e0cfc
BH		 1389 DECODE_HEAD;
1390 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1391 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1392
1393 DECODE_TAIL;
2db134eb
AA		 1394}
1395
e1ca12df
BS		 1396static __be32
1397nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1398 struct nfsd4_free_stateid *free_stateid)
1399{
1400 DECODE_HEAD;
1401
1402 READ_BUF(sizeof(stateid_t));
1403 READ32(free_stateid->fr_stateid.si_generation);
1404 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1405
1406 DECODE_TAIL;
1407}
1408
2db134eb
AA		 1409static __be32
1410nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1411 struct nfsd4_sequence *seq)
1412{
b85d4c01
BH		 1413 DECODE_HEAD;
1414
1415 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1416 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1417 READ32(seq->seqid);
1418 READ32(seq->slotid);
1419 READ32(seq->maxslots);
1420 READ32(seq->cachethis);
1421
1422 DECODE_TAIL;
2db134eb
AA		 1423}
1424
17456804
BS		 1425static __be32
1426nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1427{
17456804 1428 int i;
03cfb420
BS		 1429 __be32 *p, status;
1430 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1431
1432 READ_BUF(4);
1433 test_stateid->ts_num_ids = ntohl(*p++);
1434
03cfb420 1435 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1436
1437 for (i = 0; i < test_stateid->ts_num_ids; i++) {
03cfb420
BS		 1438 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1439 if (!stateid) {
afcf6792 1440 status = nfserrno(-ENOMEM);
03cfb420
BS		 1441 goto out;
1442 }
1443
1444 defer_free(argp, kfree, stateid);
1445 INIT_LIST_HEAD(&stateid->ts_id_list);
1446 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1447
1448 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1449 if (status)
03cfb420 1450 goto out;
17456804
BS		 1451 }
1452
1453 status = 0;
1454out:
1455 return status;
1456xdr_error:
1457 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1458 status = nfserr_bad_xdr;
1459 goto out;
1460}
1461
345c2842
MJ		 1462static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1463{
1464 DECODE_HEAD;
1465
1466 READ_BUF(8);
1467 COPYMEM(&dc->clientid, 8);
1468
1469 DECODE_TAIL;
1470}
1471
4dc6ec00
BF		 1472static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1473{
1474 DECODE_HEAD;
1475
1476 READ_BUF(4);
1477 READ32(rc->rca_one_fs);
1478
1479 DECODE_TAIL;
1480}
1481
347e0ad9
BH		 1482static __be32
1483nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1484{
1485 return nfs_ok;
1486}
1487
3c375c6f
BH		 1488static __be32
1489nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1490{
1e685ec2 1491 return nfserr_notsupp;
3c375c6f
BH		 1492}
1493
347e0ad9
BH		 1494typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1495
1496static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1497 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1498 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1499 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1500 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1501 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1502 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1503 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1504 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1505 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1506 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1507 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1508 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1509 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1510 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1511 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1512 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1513 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1514 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1515 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1516 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
a1c8c4d1 1517 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
ad1060c8
BF		 1518 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1519 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1520 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1521 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1522 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1523 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1524 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1525 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1526 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1527 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1528 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1529 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1530 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1531 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1532 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1533 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
347e0ad9
BH		 1534};
1535
2db134eb 1536static nfsd4_dec nfsd41_dec_ops[] = {
9064caae
RD		 1537 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1538 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1539 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1540 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1541 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1542 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1543 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1544 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1545 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1546 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1547 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1548 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1549 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1550 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1551 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1552 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1553 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1554 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1555 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1556 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1557 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1558 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1559 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1560 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1561 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1562 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1563 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1564 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1565 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1566 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1567 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1568 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1569 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1570 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1571 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1572 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1573 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
2db134eb
AA		 1574
1575 /* new operations for NFSv4.1 */
cb73a9f4 1576 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1577 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1578 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1579 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1580 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1581 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1582 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1583 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1584 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1585 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1586 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1587 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1588 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1589 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1590 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1591 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1592 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1593 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1594 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1595};
1596
f2feb96b
BH		 1597struct nfsd4_minorversion_ops {
1598 nfsd4_dec *decoders;
1599 int nops;
1600};
1601
1602static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
ad1060c8 1603 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
2db134eb 1604 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
f2feb96b
BH		 1605};
1606
b37ad28b 1607static __be32
1da177e4
LT		 1608nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1609{
1610 DECODE_HEAD;
1611 struct nfsd4_op *op;
f2feb96b 1612 struct nfsd4_minorversion_ops *ops;
1091006c 1613 bool cachethis = false;
1da177e4
LT		 1614 int i;
1615
1da177e4
LT		 1616 READ_BUF(4);
1617 READ32(argp->taglen);
1618 READ_BUF(argp->taglen + 8);
1619 SAVEMEM(argp->tag, argp->taglen);
1620 READ32(argp->minorversion);
1621 READ32(argp->opcnt);
1622
1623 if (argp->taglen > NFSD4_MAX_TAGLEN)
1624 goto xdr_error;
1625 if (argp->opcnt > 100)
1626 goto xdr_error;
1627
e8c96f8c 1628 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1629 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1630 if (!argp->ops) {
1631 argp->ops = argp->iops;
817cb9d4 1632 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1633 goto xdr_error;
1634 }
1635 }
1636
f2feb96b 1637 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
30cff1ff
BH		 1638 argp->opcnt = 0;
1639
f2feb96b 1640 ops = &nfsd4_minorversion[argp->minorversion];
1da177e4
LT		 1641 for (i = 0; i < argp->opcnt; i++) {
1642 op = &argp->ops[i];
1643 op->replay = NULL;
1644
8a61b18c
BF		 1645 READ_BUF(4);
1646 READ32(op->opnum);
1da177e4 1647
de3cab79 1648 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
f2feb96b 1649 op->status = ops->decoders[op->opnum](argp, &op->u);
347e0ad9 1650 else {
1da177e4
LT		 1651 op->opnum = OP_ILLEGAL;
1652 op->status = nfserr_op_illegal;
1da177e4
LT		 1653 }
1654
1655 if (op->status) {
1656 argp->opcnt = i+1;
1657 break;
1658 }
1091006c
BF		 1659 /*
1660 * We'll try to cache the result in the DRC if any one
1661 * op in the compound wants to be cached:
1662 */
1663 cachethis |= nfsd4_cache_this_op(op);
1da177e4 1664 }
1091006c
BF		 1665 /* Sessions make the DRC unnecessary: */
1666 if (argp->minorversion)
1667 cachethis = false;
1668 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4
LT		 1669
1670 DECODE_TAIL;
1671}
1da177e4 1672
1da177e4
LT		 1673#define WRITE32(n) *p++ = htonl(n)
1674#define WRITE64(n) do { \
1675 *p++ = htonl((u32)((n) >> 32)); \
1676 *p++ = htonl((u32)(n)); \
1677} while (0)
5108b276 1678#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1679 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1680 memcpy(p, ptr, nbytes); \
1681 p += XDR_QUADLEN(nbytes); \
5108b276 1682}} while (0)
c654b8a9
BF		 1683
1684static void write32(__be32 **p, u32 n)
1685{
45eaa1c1 1686 *(*p)++ = htonl(n);
c654b8a9
BF		 1687}
1688
1689static void write64(__be32 **p, u64 n)
1690{
45eaa1c1 1691 write32(p, (n >> 32));
c654b8a9
BF		 1692 write32(p, (u32)n);
1693}
1694
1695static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1696{
1697 if (IS_I_VERSION(inode)) {
1698 write64(p, inode->i_version);
1699 } else {
1700 write32(p, stat->ctime.tv_sec);
1701 write32(p, stat->ctime.tv_nsec);
1702 }
1703}
1704
1705static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1706{
1707 write32(p, c->atomic);
1708 if (c->change_supported) {
1709 write64(p, c->before_change);
1710 write64(p, c->after_change);
1711 } else {
1712 write32(p, c->before_ctime_sec);
1713 write32(p, c->before_ctime_nsec);
1714 write32(p, c->after_ctime_sec);
1715 write32(p, c->after_ctime_nsec);
1716 }
1717}
1da177e4
LT		 1718
1719#define RESERVE_SPACE(nbytes) do { \
1720 p = resp->p; \
1721 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1722} while (0)
1723#define ADJUST_ARGS() resp->p = p
1724
1725/*
1726 * Header routine to setup seqid operation replay cache
1727 */
1728#define ENCODE_SEQID_OP_HEAD \
2ebbc012 1729 __be32 *save; \
1da177e4
LT		 1730 \
1731 save = resp->p;
1732
1733/*
7fb64cee
N		 1734 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1735 * is where sequence id's are incremented, and the replay cache is filled.
1736 * Note that we increment sequence id's here, at the last moment, so we're sure
1737 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1738 */
1739
f3e42237
BF		 1740static void encode_seqid_op_tail(struct nfsd4_compoundres *resp, __be32 *save, __be32 nfserr)
1741{
1742 struct nfs4_stateowner *stateowner = resp->cstate.replay_owner;
1743
1744 if (seqid_mutating_err(ntohl(nfserr)) && stateowner) {
1745 stateowner->so_seqid++;
1746 stateowner->so_replay.rp_status = nfserr;
1747 stateowner->so_replay.rp_buflen =
1748 (char *)resp->p - (char *)save;
1749 memcpy(stateowner->so_replay.rp_buf, save,
1750 stateowner->so_replay.rp_buflen);
38c387b5 1751 nfsd4_purge_closed_stateid(stateowner);
f3e42237
BF		 1752 }
1753}
1da177e4 1754
81c3f413 1755/* Encode as an array of strings the string given with components
e7a0444a 1756 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1757 */
e7a0444a
WAA		 1758static __be32 nfsd4_encode_components_esc(char sep, char *components,
1759 __be32 **pp, int *buflen,
1760 char esc_enter, char esc_exit)
81c3f413 1761{
2ebbc012
AV		 1762 __be32 *p = *pp;
1763 __be32 *countp = p;
81c3f413 1764 int strlen, count=0;
e7a0444a 1765 char *str, *end, *next;
81c3f413
BF		 1766
1767 dprintk("nfsd4_encode_components(%s)\n", components);
1768 if ((*buflen -= 4) < 0)
1769 return nfserr_resource;
1770 WRITE32(0); /* We will fill this in with @count later */
1771 end = str = components;
1772 while (*end) {
e7a0444a
WAA		 1773 bool found_esc = false;
1774
1775 /* try to parse as esc_start, ..., esc_end, sep */
1776 if (*str == esc_enter) {
1777 for (; *end && (*end != esc_exit); end++)
1778 /* find esc_exit or end of string */;
1779 next = end + 1;
1780 if (*end && (!*next || *next == sep)) {
1781 str++;
1782 found_esc = true;
1783 }
1784 }
1785
1786 if (!found_esc)
1787 for (; *end && (*end != sep); end++)
1788 /* find sep or end of string */;
1789
81c3f413
BF		 1790 strlen = end - str;
1791 if (strlen) {
1792 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1793 return nfserr_resource;
1794 WRITE32(strlen);
1795 WRITEMEM(str, strlen);
1796 count++;
1797 }
1798 else
1799 end++;
1800 str = end;
1801 }
1802 *pp = p;
1803 p = countp;
1804 WRITE32(count);
1805 return 0;
1806}
1807
e7a0444a
WAA		 1808/* Encode as an array of strings the string given with components
1809 * separated @sep.
1810 */
1811static __be32 nfsd4_encode_components(char sep, char *components,
1812 __be32 **pp, int *buflen)
1813{
1814 return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
1815}
1816
81c3f413
BF		 1817/*
1818 * encode a location element of a fs_locations structure
1819 */
b37ad28b 1820static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1821 __be32 **pp, int *buflen)
81c3f413 1822{
b37ad28b 1823 __be32 status;
2ebbc012 1824 __be32 *p = *pp;
81c3f413 1825
e7a0444a
WAA		 1826 status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
1827 '[', ']');
81c3f413
BF		 1828 if (status)
1829 return status;
1830 status = nfsd4_encode_components('/', location->path, &p, buflen);
1831 if (status)
1832 return status;
1833 *pp = p;
1834 return 0;
1835}
1836
1837/*
ed748aac 1838 * Encode a path in RFC3530 'pathname4' format
81c3f413 1839 */
ed748aac
TM		 1840static __be32 nfsd4_encode_path(const struct path *root,
1841 const struct path *path, __be32 **pp, int *buflen)
81c3f413 1842{
ed748aac
TM		 1843 struct path cur = {
1844 .mnt = path->mnt,
1845 .dentry = path->dentry,
1846 };
1847 __be32 *p = *pp;
1848 struct dentry **components = NULL;
1849 unsigned int ncomponents = 0;
1850 __be32 err = nfserr_jukebox;
81c3f413 1851
ed748aac 1852 dprintk("nfsd4_encode_components(");
81c3f413 1853
ed748aac
TM		 1854 path_get(&cur);
1855 /* First walk the path up to the nfsd root, and store the
1856 * dentries/path components in an array.
1857 */
1858 for (;;) {
1859 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1860 break;
1861 if (cur.dentry == cur.mnt->mnt_root) {
1862 if (follow_up(&cur))
1863 continue;
1864 goto out_free;
1865 }
1866 if ((ncomponents & 15) == 0) {
1867 struct dentry **new;
1868 new = krealloc(components,
1869 sizeof(*new) * (ncomponents + 16),
1870 GFP_KERNEL);
1871 if (!new)
1872 goto out_free;
1873 components = new;
1874 }
1875 components[ncomponents++] = cur.dentry;
1876 cur.dentry = dget_parent(cur.dentry);
1877 }
81c3f413 1878
ed748aac
TM		 1879 *buflen -= 4;
1880 if (*buflen < 0)
1881 goto out_free;
1882 WRITE32(ncomponents);
1883
1884 while (ncomponents) {
1885 struct dentry *dentry = components[ncomponents - 1];
1886 unsigned int len = dentry->d_name.len;
1887
1888 *buflen -= 4 + (XDR_QUADLEN(len) << 2);
1889 if (*buflen < 0)
1890 goto out_free;
1891 WRITE32(len);
1892 WRITEMEM(dentry->d_name.name, len);
1893 dprintk("/%s", dentry->d_name.name);
1894 dput(dentry);
1895 ncomponents--;
81c3f413 1896 }
ed748aac
TM		 1897
1898 *pp = p;
1899 err = 0;
1900out_free:
1901 dprintk(")\n");
1902 while (ncomponents)
1903 dput(components[--ncomponents]);
1904 kfree(components);
1905 path_put(&cur);
1906 return err;
1907}
1908
1909static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
1910 const struct path *path, __be32 **pp, int *buflen)
1911{
1912 struct svc_export *exp_ps;
1913 __be32 res;
1914
1915 exp_ps = rqst_find_fsidzero_export(rqstp);
1916 if (IS_ERR(exp_ps))
1917 return nfserrno(PTR_ERR(exp_ps));
1918 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
1919 exp_put(exp_ps);
1920 return res;
81c3f413
BF		 1921}
1922
1923/*
1924 * encode a fs_locations structure
1925 */
b37ad28b 1926static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1927 struct svc_export *exp,
2ebbc012 1928 __be32 **pp, int *buflen)
81c3f413 1929{
b37ad28b 1930 __be32 status;
cc45f017 1931 int i;
2ebbc012 1932 __be32 *p = *pp;
81c3f413 1933 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1934
ed748aac 1935 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
81c3f413
BF		 1936 if (status)
1937 return status;
1938 if ((*buflen -= 4) < 0)
1939 return nfserr_resource;
1940 WRITE32(fslocs->locations_count);
1941 for (i=0; i<fslocs->locations_count; i++) {
1942 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1943 &p, buflen);
1944 if (status)
1945 return status;
1946 }
1947 *pp = p;
1948 return 0;
1949}
1da177e4 1950
3d2544b1
BF		 1951static u32 nfs4_file_type(umode_t mode)
1952{
1953 switch (mode & S_IFMT) {
1954 case S_IFIFO: return NF4FIFO;
1955 case S_IFCHR: return NF4CHR;
1956 case S_IFDIR: return NF4DIR;
1957 case S_IFBLK: return NF4BLK;
1958 case S_IFLNK: return NF4LNK;
1959 case S_IFREG: return NF4REG;
1960 case S_IFSOCK: return NF4SOCK;
1961 default: return NF4BAD;
1962 };
1963}
1da177e4 1964
b37ad28b 1965static __be32
1da177e4 1966nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1967 __be32 **p, int *buflen)
1da177e4
LT		 1968{
1969 int status;
1970
1971 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1972 return nfserr_resource;
1973 if (whotype != NFS4_ACL_WHO_NAMED)
1974 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1975 else if (group)
1976 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1977 else
1978 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1979 if (status < 0)
1980 return nfserrno(status);
1981 *p = xdr_encode_opaque(*p, NULL, status);
1982 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1983 BUG_ON(*buflen < 0);
1984 return 0;
1985}
1986
b37ad28b 1987static inline __be32
2ebbc012 1988nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1da177e4
LT		 1989{
1990 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1991}
1992
b37ad28b 1993static inline __be32
2ebbc012 1994nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1da177e4
LT		 1995{
1996 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1997}
1998
b37ad28b 1999static inline __be32
1da177e4 2000nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 2001 __be32 **p, int *buflen)
1da177e4
LT		 2002{
2003 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
2004}
2005
42ca0993
BF		 2006#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2007 FATTR4_WORD0_RDATTR_ERROR)
2008#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2009
b37ad28b 2010static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 2011{
2012 /* As per referral draft: */
2013 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2014 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2015 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2016 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2017 *rdattr_err = NFSERR_MOVED;
2018 else
2019 return nfserr_moved;
2020 }
2021 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2022 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2023 return 0;
2024}
1da177e4 2025
ae7095a7
BF		 2026
2027static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2028{
2029 struct path path = exp->ex_path;
2030 int err;
2031
2032 path_get(&path);
2033 while (follow_up(&path)) {
2034 if (path.dentry != path.mnt->mnt_root)
2035 break;
2036 }
2037 err = vfs_getattr(path.mnt, path.dentry, stat);
2038 path_put(&path);
2039 return err;
2040}
2041
1da177e4
LT		 2042/*
2043 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2044 * ourselves.
2045 *
2046 * @countp is the buffer size in _words_; upon successful return this becomes
2047 * replaced with the number of words written.
2048 */
b37ad28b 2049__be32
1da177e4 2050nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2ebbc012 2051 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
406a7ea9 2052 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2053{
2054 u32 bmval0 = bmval[0];
2055 u32 bmval1 = bmval[1];
7e705706 2056 u32 bmval2 = bmval[2];
1da177e4
LT		 2057 struct kstat stat;
2058 struct svc_fh tempfh;
2059 struct kstatfs statfs;
2060 int buflen = *countp << 2;
2ebbc012 2061 __be32 *attrlenp;
1da177e4
LT		 2062 u32 dummy;
2063 u64 dummy64;
42ca0993 2064 u32 rdattr_err = 0;
2ebbc012 2065 __be32 *p = buffer;
b37ad28b 2066 __be32 status;
b8dd7b9a 2067 int err;
1da177e4
LT		 2068 int aclsupport = 0;
2069 struct nfs4_acl *acl = NULL;
7e705706
AA		 2070 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2071 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2072 struct path path = {
2073 .mnt = exp->ex_path.mnt,
2074 .dentry = dentry,
2075 };
1da177e4
LT		 2076
2077 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2078 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2079 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2080 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2081
42ca0993 2082 if (exp->ex_fslocs.migrated) {
7e705706 2083 BUG_ON(bmval[2]);
42ca0993
BF		 2084 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2085 if (status)
2086 goto out;
2087 }
2088
54775491 2089 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
b8dd7b9a 2090 if (err)
1da177e4 2091 goto out_nfserr;
a16e92ed
BF		 2092 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2093 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2094 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2095 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2096 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2097 if (err)
1da177e4
LT		 2098 goto out_nfserr;
2099 }
2100 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2101 fh_init(&tempfh, NFS4_FHSIZE);
2102 status = fh_compose(&tempfh, exp, dentry, NULL);
2103 if (status)
2104 goto out;
2105 fhp = &tempfh;
2106 }
2107 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2108 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2109 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2110 aclsupport = (err == 0);
1da177e4 2111 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2112 if (err == -EOPNOTSUPP)
1da177e4 2113 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2114 else if (err == -EINVAL) {
1da177e4
LT		 2115 status = nfserr_attrnotsupp;
2116 goto out;
b8dd7b9a 2117 } else if (err != 0)
1da177e4
LT		 2118 goto out_nfserr;
2119 }
2120 }
1da177e4 2121
2b44f1ba
BH		 2122 if (bmval2) {
2123 if ((buflen -= 16) < 0)
2124 goto out_resource;
7e705706
AA		 2125 WRITE32(3);
2126 WRITE32(bmval0);
2127 WRITE32(bmval1);
2128 WRITE32(bmval2);
2b44f1ba
BH		 2129 } else if (bmval1) {
2130 if ((buflen -= 12) < 0)
2131 goto out_resource;
7e705706
AA		 2132 WRITE32(2);
2133 WRITE32(bmval0);
2134 WRITE32(bmval1);
2135 } else {
2b44f1ba
BH		 2136 if ((buflen -= 8) < 0)
2137 goto out_resource;
7e705706
AA		 2138 WRITE32(1);
2139 WRITE32(bmval0);
2140 }
1da177e4
LT		 2141 attrlenp = p++; /* to be backfilled later */
2142
2143 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2144 u32 word0 = nfsd_suppattrs0(minorversion);
2145 u32 word1 = nfsd_suppattrs1(minorversion);
2146 u32 word2 = nfsd_suppattrs2(minorversion);
2147
42ca0993
BF		 2148 if (!aclsupport)
2149 word0 &= ~FATTR4_WORD0_ACL;
7e705706 2150 if (!word2) {
2b44f1ba
BH		 2151 if ((buflen -= 12) < 0)
2152 goto out_resource;
7e705706
AA		 2153 WRITE32(2);
2154 WRITE32(word0);
2155 WRITE32(word1);
2156 } else {
2b44f1ba
BH		 2157 if ((buflen -= 16) < 0)
2158 goto out_resource;
7e705706
AA		 2159 WRITE32(3);
2160 WRITE32(word0);
2161 WRITE32(word1);
2162 WRITE32(word2);
2163 }
1da177e4
LT		 2164 }
2165 if (bmval0 & FATTR4_WORD0_TYPE) {
2166 if ((buflen -= 4) < 0)
2167 goto out_resource;
3d2544b1 2168 dummy = nfs4_file_type(stat.mode);
1da177e4
LT		 2169 if (dummy == NF4BAD)
2170 goto out_serverfault;
2171 WRITE32(dummy);
2172 }
2173 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2174 if ((buflen -= 4) < 0)
2175 goto out_resource;
49640001 2176 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 2177 WRITE32(NFS4_FH_PERSISTENT);
49640001 2178 else
e34ac862 2179 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 2180 }
2181 if (bmval0 & FATTR4_WORD0_CHANGE) {
1da177e4
LT		 2182 if ((buflen -= 8) < 0)
2183 goto out_resource;
c654b8a9 2184 write_change(&p, &stat, dentry->d_inode);
1da177e4
LT		 2185 }
2186 if (bmval0 & FATTR4_WORD0_SIZE) {
2187 if ((buflen -= 8) < 0)
2188 goto out_resource;
2189 WRITE64(stat.size);
2190 }
2191 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2192 if ((buflen -= 4) < 0)
2193 goto out_resource;
2194 WRITE32(1);
2195 }
2196 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2197 if ((buflen -= 4) < 0)
2198 goto out_resource;
2199 WRITE32(1);
2200 }
2201 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2202 if ((buflen -= 4) < 0)
2203 goto out_resource;
2204 WRITE32(0);
2205 }
2206 if (bmval0 & FATTR4_WORD0_FSID) {
2207 if ((buflen -= 16) < 0)
2208 goto out_resource;
42ca0993
BF		 2209 if (exp->ex_fslocs.migrated) {
2210 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2211 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2212 } else switch(fsid_source(fhp)) {
2213 case FSIDSOURCE_FSID:
1da177e4
LT		 2214 WRITE64((u64)exp->ex_fsid);
2215 WRITE64((u64)0);
af6a4e28
N		 2216 break;
2217 case FSIDSOURCE_DEV:
1da177e4
LT		 2218 WRITE32(0);
2219 WRITE32(MAJOR(stat.dev));
2220 WRITE32(0);
2221 WRITE32(MINOR(stat.dev));
af6a4e28
N		 2222 break;
2223 case FSIDSOURCE_UUID:
2224 WRITEMEM(exp->ex_uuid, 16);
2225 break;
1da177e4
LT		 2226 }
2227 }
2228 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2229 if ((buflen -= 4) < 0)
2230 goto out_resource;
2231 WRITE32(0);
2232 }
2233 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2234 if ((buflen -= 4) < 0)
2235 goto out_resource;
cf07d2ea 2236 WRITE32(nfsd4_lease);
1da177e4
LT		 2237 }
2238 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2239 if ((buflen -= 4) < 0)
2240 goto out_resource;
42ca0993 2241 WRITE32(rdattr_err);
1da177e4
LT		 2242 }
2243 if (bmval0 & FATTR4_WORD0_ACL) {
2244 struct nfs4_ace *ace;
1da177e4
LT		 2245
2246 if (acl == NULL) {
2247 if ((buflen -= 4) < 0)
2248 goto out_resource;
2249
2250 WRITE32(0);
2251 goto out_acl;
2252 }
2253 if ((buflen -= 4) < 0)
2254 goto out_resource;
2255 WRITE32(acl->naces);
2256
28e05dd8 2257 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 2258 if ((buflen -= 4*3) < 0)
2259 goto out_resource;
2260 WRITE32(ace->type);
2261 WRITE32(ace->flag);
2262 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
2263 status = nfsd4_encode_aclname(rqstp, ace->whotype,
2264 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
2265 &p, &buflen);
2266 if (status == nfserr_resource)
2267 goto out_resource;
2268 if (status)
2269 goto out;
2270 }
2271 }
2272out_acl:
2273 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2274 if ((buflen -= 4) < 0)
2275 goto out_resource;
2276 WRITE32(aclsupport ?
2277 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2278 }
2279 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2280 if ((buflen -= 4) < 0)
2281 goto out_resource;
2282 WRITE32(1);
2283 }
2284 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2285 if ((buflen -= 4) < 0)
2286 goto out_resource;
2930d381 2287 WRITE32(0);
1da177e4
LT		 2288 }
2289 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2290 if ((buflen -= 4) < 0)
2291 goto out_resource;
2292 WRITE32(1);
2293 }
2294 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2295 if ((buflen -= 4) < 0)
2296 goto out_resource;
2297 WRITE32(1);
2298 }
2299 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2300 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2301 if (buflen < 0)
2302 goto out_resource;
2303 WRITE32(fhp->fh_handle.fh_size);
2304 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2305 }
2306 if (bmval0 & FATTR4_WORD0_FILEID) {
2307 if ((buflen -= 8) < 0)
2308 goto out_resource;
40ee5dc6 2309 WRITE64(stat.ino);
1da177e4
LT		 2310 }
2311 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2312 if ((buflen -= 8) < 0)
2313 goto out_resource;
2314 WRITE64((u64) statfs.f_ffree);
2315 }
2316 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2317 if ((buflen -= 8) < 0)
2318 goto out_resource;
2319 WRITE64((u64) statfs.f_ffree);
2320 }
2321 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2322 if ((buflen -= 8) < 0)
2323 goto out_resource;
2324 WRITE64((u64) statfs.f_files);
2325 }
81c3f413
BF		 2326 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2327 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2328 if (status == nfserr_resource)
2329 goto out_resource;
2330 if (status)
2331 goto out;
2332 }
1da177e4
LT		 2333 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2334 if ((buflen -= 4) < 0)
2335 goto out_resource;
2336 WRITE32(1);
2337 }
2338 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2339 if ((buflen -= 8) < 0)
2340 goto out_resource;
2341 WRITE64(~(u64)0);
2342 }
2343 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2344 if ((buflen -= 4) < 0)
2345 goto out_resource;
2346 WRITE32(255);
2347 }
2348 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2349 if ((buflen -= 4) < 0)
2350 goto out_resource;
a16e92ed 2351 WRITE32(statfs.f_namelen);
1da177e4
LT		 2352 }
2353 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2354 if ((buflen -= 8) < 0)
2355 goto out_resource;
7adae489 2356 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2357 }
2358 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2359 if ((buflen -= 8) < 0)
2360 goto out_resource;
7adae489 2361 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2362 }
2363 if (bmval1 & FATTR4_WORD1_MODE) {
2364 if ((buflen -= 4) < 0)
2365 goto out_resource;
2366 WRITE32(stat.mode & S_IALLUGO);
2367 }
2368 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2369 if ((buflen -= 4) < 0)
2370 goto out_resource;
2371 WRITE32(1);
2372 }
2373 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2374 if ((buflen -= 4) < 0)
2375 goto out_resource;
2376 WRITE32(stat.nlink);
2377 }
2378 if (bmval1 & FATTR4_WORD1_OWNER) {
2379 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2380 if (status == nfserr_resource)
2381 goto out_resource;
2382 if (status)
2383 goto out;
2384 }
2385 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2386 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2387 if (status == nfserr_resource)
2388 goto out_resource;
2389 if (status)
2390 goto out;
2391 }
2392 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2393 if ((buflen -= 8) < 0)
2394 goto out_resource;
2395 WRITE32((u32) MAJOR(stat.rdev));
2396 WRITE32((u32) MINOR(stat.rdev));
2397 }
2398 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2399 if ((buflen -= 8) < 0)
2400 goto out_resource;
2401 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2402 WRITE64(dummy64);
2403 }
2404 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2405 if ((buflen -= 8) < 0)
2406 goto out_resource;
2407 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2408 WRITE64(dummy64);
2409 }
2410 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2411 if ((buflen -= 8) < 0)
2412 goto out_resource;
2413 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2414 WRITE64(dummy64);
2415 }
2416 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2417 if ((buflen -= 8) < 0)
2418 goto out_resource;
2419 dummy64 = (u64)stat.blocks << 9;
2420 WRITE64(dummy64);
2421 }
2422 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2423 if ((buflen -= 12) < 0)
2424 goto out_resource;
2425 WRITE32(0);
2426 WRITE32(stat.atime.tv_sec);
2427 WRITE32(stat.atime.tv_nsec);
2428 }
2429 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2430 if ((buflen -= 12) < 0)
2431 goto out_resource;
2432 WRITE32(0);
2433 WRITE32(1);
2434 WRITE32(0);
2435 }
2436 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2437 if ((buflen -= 12) < 0)
2438 goto out_resource;
2439 WRITE32(0);
2440 WRITE32(stat.ctime.tv_sec);
2441 WRITE32(stat.ctime.tv_nsec);
2442 }
2443 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2444 if ((buflen -= 12) < 0)
2445 goto out_resource;
2446 WRITE32(0);
2447 WRITE32(stat.mtime.tv_sec);
2448 WRITE32(stat.mtime.tv_nsec);
2449 }
2450 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 2451 if ((buflen -= 8) < 0)
2452 goto out_resource;
406a7ea9
FF		 2453 /*
2454 * Get parent's attributes if not ignoring crossmount
2455 * and this is the root of a cross-mounted filesystem.
2456 */
2457 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2458 dentry == exp->ex_path.mnt->mnt_root)
2459 get_parent_attributes(exp, &stat);
40ee5dc6 2460 WRITE64(stat.ino);
1da177e4 2461 }
8c18f205
BH		 2462 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2463 WRITE32(3);
2464 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2465 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2466 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2467 }
7e705706 2468
1da177e4
LT		 2469 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2470 *countp = p - buffer;
2471 status = nfs_ok;
2472
2473out:
28e05dd8 2474 kfree(acl);
1da177e4
LT		 2475 if (fhp == &tempfh)
2476 fh_put(&tempfh);
2477 return status;
2478out_nfserr:
b8dd7b9a 2479 status = nfserrno(err);
1da177e4
LT		 2480 goto out;
2481out_resource:
2482 *countp = 0;
2483 status = nfserr_resource;
2484 goto out;
2485out_serverfault:
2486 status = nfserr_serverfault;
2487 goto out;
2488}
2489
c0ce6ec8
BF		 2490static inline int attributes_need_mount(u32 *bmval)
2491{
2492 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2493 return 1;
2494 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2495 return 1;
2496 return 0;
2497}
2498
b37ad28b 2499static __be32
1da177e4 2500nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2ebbc012 2501 const char *name, int namlen, __be32 *p, int *buflen)
1da177e4
LT		 2502{
2503 struct svc_export *exp = cd->rd_fhp->fh_export;
2504 struct dentry *dentry;
b37ad28b 2505 __be32 nfserr;
406a7ea9 2506 int ignore_crossmnt = 0;
1da177e4
LT		 2507
2508 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2509 if (IS_ERR(dentry))
2510 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2511 if (!dentry->d_inode) {
2512 /*
2513 * nfsd_buffered_readdir drops the i_mutex between
2514 * readdir and calling this callback, leaving a window
2515 * where this directory entry could have gone away.
2516 */
2517 dput(dentry);
2518 return nfserr_noent;
2519 }
1da177e4
LT		 2520
2521 exp_get(exp);
406a7ea9
FF		 2522 /*
2523 * In the case of a mountpoint, the client may be asking for
2524 * attributes that are only properties of the underlying filesystem
2525 * as opposed to the cross-mounted file system. In such a case,
2526 * we will not follow the cross mount and will fill the attribtutes
2527 * directly from the mountpoint dentry.
2528 */
3227fa41 2529 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2530 int err;
2531
3227fa41
BF		 2532 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2533 && !attributes_need_mount(cd->rd_bmval)) {
2534 ignore_crossmnt = 1;
2535 goto out_encode;
2536 }
dcb488a3
AA		 2537 /*
2538 * Why the heck aren't we just using nfsd_lookup??
2539 * Different "."/".." handling? Something else?
2540 * At least, add a comment here to explain....
2541 */
021d3a72
BF		 2542 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2543 if (err) {
2544 nfserr = nfserrno(err);
1da177e4
LT		 2545 goto out_put;
2546 }
dcb488a3
AA		 2547 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2548 if (nfserr)
2549 goto out_put;
1da177e4
LT		 2550
2551 }
3227fa41 2552out_encode:
1da177e4 2553 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 2554 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2555out_put:
2556 dput(dentry);
2557 exp_put(exp);
2558 return nfserr;
2559}
2560
2ebbc012 2561static __be32 *
b37ad28b 2562nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2563{
2ebbc012 2564 __be32 *attrlenp;
1da177e4
LT		 2565
2566 if (buflen < 6)
2567 return NULL;
2568 *p++ = htonl(2);
2569 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2570 *p++ = htonl(0); /* bmval1 */
2571
2572 attrlenp = p++;
2573 *p++ = nfserr; /* no htonl */
2574 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2575 return p;
2576}
2577
2578static int
a0ad13ef
N		 2579nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2580 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2581{
a0ad13ef 2582 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2583 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2584 int buflen;
2ebbc012 2585 __be32 *p = cd->buffer;
b2c0cea6 2586 __be32 *cookiep;
b37ad28b 2587 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2588
2589 /* In nfsv4, "." and ".." never make it onto the wire.. */
2590 if (name && isdotent(name, namlen)) {
2591 cd->common.err = nfs_ok;
2592 return 0;
2593 }
2594
2595 if (cd->offset)
2596 xdr_encode_hyper(cd->offset, (u64) offset);
2597
2598 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2599 if (buflen < 0)
2600 goto fail;
2601
2602 *p++ = xdr_one; /* mark entry present */
b2c0cea6 2603 cookiep = p;
1da177e4
LT		 2604 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2605 p = xdr_encode_array(p, name, namlen); /* name length & name */
2606
2607 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2608 switch (nfserr) {
2609 case nfs_ok:
2610 p += buflen;
2611 break;
2612 case nfserr_resource:
2613 nfserr = nfserr_toosmall;
2614 goto fail;
b2c0cea6
BF		 2615 case nfserr_noent:
2616 goto skip_entry;
1da177e4
LT		 2617 default:
2618 /*
2619 * If the client requested the RDATTR_ERROR attribute,
2620 * we stuff the error code into this attribute
2621 * and continue. If this attribute was not requested,
2622 * then in accordance with the spec, we fail the
2623 * entire READDIR operation(!)
2624 */
2625 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2626 goto fail;
1da177e4 2627 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2628 if (p == NULL) {
2629 nfserr = nfserr_toosmall;
1da177e4 2630 goto fail;
34081efc 2631 }
1da177e4
LT		 2632 }
2633 cd->buflen -= (p - cd->buffer);
2634 cd->buffer = p;
b2c0cea6
BF		 2635 cd->offset = cookiep;
2636skip_entry:
1da177e4
LT		 2637 cd->common.err = nfs_ok;
2638 return 0;
2639fail:
2640 cd->common.err = nfserr;
2641 return -EINVAL;
2642}
2643
e2f282b9
BH		 2644static void
2645nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2646{
bc749ca4 2647 __be32 *p;
e2f282b9
BH		 2648
2649 RESERVE_SPACE(sizeof(stateid_t));
2650 WRITE32(sid->si_generation);
2651 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2652 ADJUST_ARGS();
2653}
2654
695e12f8 2655static __be32
b37ad28b 2656nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2657{
bc749ca4 2658 __be32 *p;
1da177e4
LT		 2659
2660 if (!nfserr) {
2661 RESERVE_SPACE(8);
2662 WRITE32(access->ac_supported);
2663 WRITE32(access->ac_resp_access);
2664 ADJUST_ARGS();
2665 }
695e12f8 2666 return nfserr;
1da177e4
LT		 2667}
2668
1d1bc8f2
BF		 2669static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2670{
2671 __be32 *p;
2672
2673 if (!nfserr) {
2674 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2675 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2676 WRITE32(bcts->dir);
6e67b5d1 2677 /* Sorry, we do not yet support RDMA over 4.1: */
1d1bc8f2
BF		 2678 WRITE32(0);
2679 ADJUST_ARGS();
2680 }
2681 return nfserr;
2682}
2683
695e12f8 2684static __be32
b37ad28b 2685nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4
LT		 2686{
2687 ENCODE_SEQID_OP_HEAD;
2688
e2f282b9
BH		 2689 if (!nfserr)
2690 nfsd4_encode_stateid(resp, &close->cl_stateid);
2691
f3e42237 2692 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2693 return nfserr;
1da177e4
LT		 2694}
2695
2696
695e12f8 2697static __be32
b37ad28b 2698nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2699{
bc749ca4 2700 __be32 *p;
1da177e4
LT		 2701
2702 if (!nfserr) {
ab4684d1
CL		 2703 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
2704 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 2705 ADJUST_ARGS();
2706 }
695e12f8 2707 return nfserr;
1da177e4
LT		 2708}
2709
695e12f8 2710static __be32
b37ad28b 2711nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2712{
bc749ca4 2713 __be32 *p;
1da177e4
LT		 2714
2715 if (!nfserr) {
2716 RESERVE_SPACE(32);
c654b8a9 2717 write_cinfo(&p, &create->cr_cinfo);
1da177e4
LT		 2718 WRITE32(2);
2719 WRITE32(create->cr_bmval[0]);
2720 WRITE32(create->cr_bmval[1]);
2721 ADJUST_ARGS();
2722 }
695e12f8 2723 return nfserr;
1da177e4
LT		 2724}
2725
b37ad28b
AV		 2726static __be32
2727nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2728{
2729 struct svc_fh *fhp = getattr->ga_fhp;
2730 int buflen;
2731
2732 if (nfserr)
2733 return nfserr;
2734
2735 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2736 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2737 resp->p, &buflen, getattr->ga_bmval,
406a7ea9 2738 resp->rqstp, 0);
1da177e4
LT		 2739 if (!nfserr)
2740 resp->p += buflen;
2741 return nfserr;
2742}
2743
695e12f8
BH		 2744static __be32
2745nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2746{
695e12f8 2747 struct svc_fh *fhp = *fhpp;
1da177e4 2748 unsigned int len;
bc749ca4 2749 __be32 *p;
1da177e4
LT		 2750
2751 if (!nfserr) {
2752 len = fhp->fh_handle.fh_size;
2753 RESERVE_SPACE(len + 4);
2754 WRITE32(len);
2755 WRITEMEM(&fhp->fh_handle.fh_base, len);
2756 ADJUST_ARGS();
2757 }
695e12f8 2758 return nfserr;
1da177e4
LT		 2759}
2760
2761/*
2762* Including all fields other than the name, a LOCK4denied structure requires
2763* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2764*/
2765static void
2766nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2767{
7c13f344 2768 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2769 __be32 *p;
1da177e4 2770
7c13f344 2771 RESERVE_SPACE(32 + XDR_LEN(conf->len));
1da177e4
LT		 2772 WRITE64(ld->ld_start);
2773 WRITE64(ld->ld_length);
2774 WRITE32(ld->ld_type);
7c13f344 2775 if (conf->len) {
1da177e4 2776 WRITEMEM(&ld->ld_clientid, 8);
7c13f344
BF		 2777 WRITE32(conf->len);
2778 WRITEMEM(conf->data, conf->len);
2779 kfree(conf->data);
1da177e4
LT		 2780 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2781 WRITE64((u64)0); /* clientid */
2782 WRITE32(0); /* length of owner name */
2783 }
2784 ADJUST_ARGS();
2785}
2786
695e12f8 2787static __be32
b37ad28b 2788nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2789{
1da177e4
LT		 2790 ENCODE_SEQID_OP_HEAD;
2791
e2f282b9
BH		 2792 if (!nfserr)
2793 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2794 else if (nfserr == nfserr_denied)
1da177e4
LT		 2795 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2796
f3e42237 2797 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2798 return nfserr;
1da177e4
LT		 2799}
2800
695e12f8 2801static __be32
b37ad28b 2802nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2803{
2804 if (nfserr == nfserr_denied)
2805 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2806 return nfserr;
1da177e4
LT		 2807}
2808
695e12f8 2809static __be32
b37ad28b 2810nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4
LT		 2811{
2812 ENCODE_SEQID_OP_HEAD;
2813
e2f282b9
BH		 2814 if (!nfserr)
2815 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2816
f3e42237 2817 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2818 return nfserr;
1da177e4
LT		 2819}
2820
2821
695e12f8 2822static __be32
b37ad28b 2823nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2824{
bc749ca4 2825 __be32 *p;
1da177e4
LT		 2826
2827 if (!nfserr) {
2828 RESERVE_SPACE(20);
c654b8a9 2829 write_cinfo(&p, &link->li_cinfo);
1da177e4
LT		 2830 ADJUST_ARGS();
2831 }
695e12f8 2832 return nfserr;
1da177e4
LT		 2833}
2834
2835
695e12f8 2836static __be32
b37ad28b 2837nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2838{
bc749ca4 2839 __be32 *p;
1da177e4
LT		 2840 ENCODE_SEQID_OP_HEAD;
2841
2842 if (nfserr)
2843 goto out;
2844
e2f282b9
BH		 2845 nfsd4_encode_stateid(resp, &open->op_stateid);
2846 RESERVE_SPACE(40);
c654b8a9 2847 write_cinfo(&p, &open->op_cinfo);
1da177e4
LT		 2848 WRITE32(open->op_rflags);
2849 WRITE32(2);
2850 WRITE32(open->op_bmval[0]);
2851 WRITE32(open->op_bmval[1]);
2852 WRITE32(open->op_delegate_type);
2853 ADJUST_ARGS();
2854
2855 switch (open->op_delegate_type) {
2856 case NFS4_OPEN_DELEGATE_NONE:
2857 break;
2858 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2859 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2860 RESERVE_SPACE(20);
7b190fec 2861 WRITE32(open->op_recall);
1da177e4
LT		 2862
2863 /*
2864 * TODO: ACE's in delegations
2865 */
2866 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2867 WRITE32(0);
2868 WRITE32(0);
2869 WRITE32(0); /* XXX: is NULL principal ok? */
2870 ADJUST_ARGS();
2871 break;
2872 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2873 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2874 RESERVE_SPACE(32);
1da177e4
LT		 2875 WRITE32(0);
2876
2877 /*
2878 * TODO: space_limit's in delegations
2879 */
2880 WRITE32(NFS4_LIMIT_SIZE);
2881 WRITE32(~(u32)0);
2882 WRITE32(~(u32)0);
2883
2884 /*
2885 * TODO: ACE's in delegations
2886 */
2887 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2888 WRITE32(0);
2889 WRITE32(0);
2890 WRITE32(0); /* XXX: is NULL principal ok? */
2891 ADJUST_ARGS();
2892 break;
d24433cd
BH		 2893 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
2894 switch (open->op_why_no_deleg) {
2895 case WND4_CONTENTION:
2896 case WND4_RESOURCE:
2897 RESERVE_SPACE(8);
2898 WRITE32(open->op_why_no_deleg);
2899 WRITE32(0); /* deleg signaling not supported yet */
2900 break;
2901 default:
2902 RESERVE_SPACE(4);
2903 WRITE32(open->op_why_no_deleg);
2904 }
2905 ADJUST_ARGS();
2906 break;
1da177e4
LT		 2907 default:
2908 BUG();
2909 }
2910 /* XXX save filehandle here */
2911out:
f3e42237 2912 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2913 return nfserr;
1da177e4
LT		 2914}
2915
695e12f8 2916static __be32
b37ad28b 2917nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4
LT		 2918{
2919 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2920
2921 if (!nfserr)
2922 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4 2923
f3e42237 2924 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2925 return nfserr;
1da177e4
LT		 2926}
2927
695e12f8 2928static __be32
b37ad28b 2929nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4
LT		 2930{
2931 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2932
2933 if (!nfserr)
2934 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4 2935
f3e42237 2936 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2937 return nfserr;
1da177e4
LT		 2938}
2939
b37ad28b
AV		 2940static __be32
2941nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2942 struct nfsd4_read *read)
1da177e4
LT		 2943{
2944 u32 eof;
2945 int v, pn;
2946 unsigned long maxcount;
2947 long len;
bc749ca4 2948 __be32 *p;
1da177e4
LT		 2949
2950 if (nfserr)
2951 return nfserr;
2952 if (resp->xbuf->page_len)
2953 return nfserr_resource;
2954
2955 RESERVE_SPACE(8); /* eof flag and byte count */
2956
7adae489 2957 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2958 if (maxcount > read->rd_length)
2959 maxcount = read->rd_length;
2960
2961 len = maxcount;
2962 v = 0;
2963 while (len > 0) {
44524359 2964 pn = resp->rqstp->rq_resused++;
3cc03b16 2965 resp->rqstp->rq_vec[v].iov_base =
44524359 2966 page_address(resp->rqstp->rq_respages[pn]);
3cc03b16 2967 resp->rqstp->rq_vec[v].iov_len =
44524359 2968 len < PAGE_SIZE ? len : PAGE_SIZE;
1da177e4
LT		 2969 v++;
2970 len -= PAGE_SIZE;
2971 }
2972 read->rd_vlen = v;
2973
039a87ca 2974 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2975 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2976 &maxcount);
2977
1da177e4
LT		 2978 if (nfserr)
2979 return nfserr;
44524359
N		 2980 eof = (read->rd_offset + maxcount >=
2981 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2982
2983 WRITE32(eof);
2984 WRITE32(maxcount);
2985 ADJUST_ARGS();
6ed6decc
N		 2986 resp->xbuf->head[0].iov_len = (char*)p
2987 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2988 resp->xbuf->page_len = maxcount;
2989
6ed6decc 2990 /* Use rest of head for padding and remaining ops: */
6ed6decc 2991 resp->xbuf->tail[0].iov_base = p;
1da177e4 2992 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2993 if (maxcount&3) {
6ed6decc
N		 2994 RESERVE_SPACE(4);
2995 WRITE32(0);
1da177e4
LT		 2996 resp->xbuf->tail[0].iov_base += maxcount&3;
2997 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2998 ADJUST_ARGS();
1da177e4
LT		 2999 }
3000 return 0;
3001}
3002
b37ad28b
AV		 3003static __be32
3004nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3005{
3006 int maxcount;
3007 char *page;
bc749ca4 3008 __be32 *p;
1da177e4
LT		 3009
3010 if (nfserr)
3011 return nfserr;
3012 if (resp->xbuf->page_len)
3013 return nfserr_resource;
3014
44524359 3015 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 3016
3017 maxcount = PAGE_SIZE;
3018 RESERVE_SPACE(4);
3019
3020 /*
3021 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3022 * if they would overflow the buffer. Is this kosher in NFSv4? If
3023 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3024 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3025 */
3026 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
3027 if (nfserr == nfserr_isdir)
3028 return nfserr_inval;
3029 if (nfserr)
3030 return nfserr;
3031
3032 WRITE32(maxcount);
3033 ADJUST_ARGS();
6ed6decc
N		 3034 resp->xbuf->head[0].iov_len = (char*)p
3035 - (char*)resp->xbuf->head[0].iov_base;
3036 resp->xbuf->page_len = maxcount;
1da177e4 3037
6ed6decc 3038 /* Use rest of head for padding and remaining ops: */
6ed6decc 3039 resp->xbuf->tail[0].iov_base = p;
1da177e4 3040 resp->xbuf->tail[0].iov_len = 0;
1da177e4 3041 if (maxcount&3) {
6ed6decc
N		 3042 RESERVE_SPACE(4);
3043 WRITE32(0);
1da177e4
LT		 3044 resp->xbuf->tail[0].iov_base += maxcount&3;
3045 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 3046 ADJUST_ARGS();
1da177e4
LT		 3047 }
3048 return 0;
3049}
3050
b37ad28b
AV		 3051static __be32
3052nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3053{
3054 int maxcount;
3055 loff_t offset;
2ebbc012 3056 __be32 *page, *savep, *tailbase;
bc749ca4 3057 __be32 *p;
1da177e4
LT		 3058
3059 if (nfserr)
3060 return nfserr;
3061 if (resp->xbuf->page_len)
3062 return nfserr_resource;
3063
ab4684d1 3064 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
1da177e4
LT		 3065 savep = p;
3066
3067 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3068 WRITE32(0);
3069 WRITE32(0);
3070 ADJUST_ARGS();
3071 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 3072 tailbase = p;
1da177e4
LT		 3073
3074 maxcount = PAGE_SIZE;
3075 if (maxcount > readdir->rd_maxcount)
3076 maxcount = readdir->rd_maxcount;
3077
3078 /*
3079 * Convert from bytes to words, account for the two words already
3080 * written, make sure to leave two words at the end for the next
3081 * pointer and eof field.
3082 */
3083 maxcount = (maxcount >> 2) - 4;
3084 if (maxcount < 0) {
3085 nfserr = nfserr_toosmall;
3086 goto err_no_verf;
3087 }
3088
44524359 3089 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 3090 readdir->common.err = 0;
3091 readdir->buflen = maxcount;
3092 readdir->buffer = page;
3093 readdir->offset = NULL;
3094
3095 offset = readdir->rd_cookie;
3096 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3097 &offset,
3098 &readdir->common, nfsd4_encode_dirent);
3099 if (nfserr == nfs_ok &&
3100 readdir->common.err == nfserr_toosmall &&
3101 readdir->buffer == page)
3102 nfserr = nfserr_toosmall;
1da177e4
LT		 3103 if (nfserr)
3104 goto err_no_verf;
3105
3106 if (readdir->offset)
3107 xdr_encode_hyper(readdir->offset, offset);
3108
3109 p = readdir->buffer;
3110 *p++ = 0; /* no more entries */
3111 *p++ = htonl(readdir->common.err == nfserr_eof);
44524359
N		 3112 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
3113 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
1da177e4 3114
bb6e8a9f 3115 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 3116 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 3117 resp->xbuf->tail[0].iov_len = 0;
3118 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 3119 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 3120
3121 return 0;
3122err_no_verf:
3123 p = savep;
3124 ADJUST_ARGS();
3125 return nfserr;
3126}
3127
695e12f8 3128static __be32
b37ad28b 3129nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3130{
bc749ca4 3131 __be32 *p;
1da177e4
LT		 3132
3133 if (!nfserr) {
3134 RESERVE_SPACE(20);
c654b8a9 3135 write_cinfo(&p, &remove->rm_cinfo);
1da177e4
LT		 3136 ADJUST_ARGS();
3137 }
695e12f8 3138 return nfserr;
1da177e4
LT		 3139}
3140
695e12f8 3141static __be32
b37ad28b 3142nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3143{
bc749ca4 3144 __be32 *p;
1da177e4
LT		 3145
3146 if (!nfserr) {
3147 RESERVE_SPACE(40);
c654b8a9
BF		 3148 write_cinfo(&p, &rename->rn_sinfo);
3149 write_cinfo(&p, &rename->rn_tinfo);
1da177e4
LT		 3150 ADJUST_ARGS();
3151 }
695e12f8 3152 return nfserr;
1da177e4
LT		 3153}
3154
695e12f8 3155static __be32
22b6dee8
MJ		 3156nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
3157 __be32 nfserr,struct svc_export *exp)
dcb488a3
AA		 3158{
3159 int i = 0;
4796f457
BF		 3160 u32 nflavs;
3161 struct exp_flavor_info *flavs;
3162 struct exp_flavor_info def_flavs[2];
bc749ca4 3163 __be32 *p;
dcb488a3
AA		 3164
3165 if (nfserr)
3166 goto out;
4796f457
BF		 3167 if (exp->ex_nflavors) {
3168 flavs = exp->ex_flavors;
3169 nflavs = exp->ex_nflavors;
3170 } else { /* Handling of some defaults in absence of real secinfo: */
3171 flavs = def_flavs;
3172 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3173 nflavs = 2;
3174 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3175 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3176 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3177 nflavs = 1;
3178 flavs[0].pseudoflavor
3179 = svcauth_gss_flavor(exp->ex_client);
3180 } else {
3181 nflavs = 1;
3182 flavs[0].pseudoflavor
3183 = exp->ex_client->flavour->flavour;
3184 }
3185 }
3186
dcb488a3 3187 RESERVE_SPACE(4);
4796f457 3188 WRITE32(nflavs);
dcb488a3 3189 ADJUST_ARGS();
4796f457
BF		 3190 for (i = 0; i < nflavs; i++) {
3191 u32 flav = flavs[i].pseudoflavor;
dcb488a3
AA		 3192 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
3193
3194 if (gm) {
3195 RESERVE_SPACE(4);
3196 WRITE32(RPC_AUTH_GSS);
3197 ADJUST_ARGS();
3198 RESERVE_SPACE(4 + gm->gm_oid.len);
3199 WRITE32(gm->gm_oid.len);
3200 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
3201 ADJUST_ARGS();
3202 RESERVE_SPACE(4);
3203 WRITE32(0); /* qop */
3204 ADJUST_ARGS();
3205 RESERVE_SPACE(4);
3206 WRITE32(gss_pseudoflavor_to_service(gm, flav));
3207 ADJUST_ARGS();
3208 gss_mech_put(gm);
3209 } else {
3210 RESERVE_SPACE(4);
3211 WRITE32(flav);
3212 ADJUST_ARGS();
3213 }
3214 }
3215out:
3216 if (exp)
3217 exp_put(exp);
695e12f8 3218 return nfserr;
dcb488a3
AA		 3219}
3220
22b6dee8
MJ		 3221static __be32
3222nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3223 struct nfsd4_secinfo *secinfo)
3224{
3225 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3226}
3227
3228static __be32
3229nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3230 struct nfsd4_secinfo_no_name *secinfo)
3231{
3232 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3233}
3234
1da177e4
LT		 3235/*
3236 * The SETATTR encode routine is special -- it always encodes a bitmap,
3237 * regardless of the error status.
3238 */
695e12f8 3239static __be32
b37ad28b 3240nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3241{
bc749ca4 3242 __be32 *p;
1da177e4
LT		 3243
3244 RESERVE_SPACE(12);
3245 if (nfserr) {
3246 WRITE32(2);
3247 WRITE32(0);
3248 WRITE32(0);
3249 }
3250 else {
3251 WRITE32(2);
3252 WRITE32(setattr->sa_bmval[0]);
3253 WRITE32(setattr->sa_bmval[1]);
3254 }
3255 ADJUST_ARGS();
695e12f8 3256 return nfserr;
1da177e4
LT		 3257}
3258
695e12f8 3259static __be32
b37ad28b 3260nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3261{
bc749ca4 3262 __be32 *p;
1da177e4
LT		 3263
3264 if (!nfserr) {
ab4684d1 3265 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE);
1da177e4 3266 WRITEMEM(&scd->se_clientid, 8);
ab4684d1 3267 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3268 ADJUST_ARGS();
3269 }
3270 else if (nfserr == nfserr_clid_inuse) {
3271 RESERVE_SPACE(8);
3272 WRITE32(0);
3273 WRITE32(0);
3274 ADJUST_ARGS();
3275 }
695e12f8 3276 return nfserr;
1da177e4
LT		 3277}
3278
695e12f8 3279static __be32
b37ad28b 3280nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3281{
bc749ca4 3282 __be32 *p;
1da177e4
LT		 3283
3284 if (!nfserr) {
3285 RESERVE_SPACE(16);
3286 WRITE32(write->wr_bytes_written);
3287 WRITE32(write->wr_how_written);
ab4684d1 3288 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3289 ADJUST_ARGS();
3290 }
695e12f8 3291 return nfserr;
1da177e4
LT		 3292}
3293
2db134eb 3294static __be32
57b7b43b 3295nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3296 struct nfsd4_exchange_id *exid)
3297{
bc749ca4 3298 __be32 *p;
0733d213
AA		 3299 char *major_id;
3300 char *server_scope;
3301 int major_id_sz;
3302 int server_scope_sz;
3303 uint64_t minor_id = 0;
3304
3305 if (nfserr)
3306 return nfserr;
3307
3308 major_id = utsname()->nodename;
3309 major_id_sz = strlen(major_id);
3310 server_scope = utsname()->nodename;
3311 server_scope_sz = strlen(server_scope);
3312
3313 RESERVE_SPACE(
3314 8 /* eir_clientid */ +
3315 4 /* eir_sequenceid */ +
3316 4 /* eir_flags */ +
3317 4 /* spr_how (SP4_NONE) */ +
3318 8 /* so_minor_id */ +
3319 4 /* so_major_id.len */ +
3320 (XDR_QUADLEN(major_id_sz) * 4) +
3321 4 /* eir_server_scope.len */ +
3322 (XDR_QUADLEN(server_scope_sz) * 4) +
3323 4 /* eir_server_impl_id.count (0) */);
3324
3325 WRITEMEM(&exid->clientid, 8);
3326 WRITE32(exid->seqid);
3327 WRITE32(exid->flags);
3328
3329 /* state_protect4_r. Currently only support SP4_NONE */
3330 BUG_ON(exid->spa_how != SP4_NONE);
3331 WRITE32(exid->spa_how);
3332
3333 /* The server_owner struct */
3334 WRITE64(minor_id); /* Minor id */
3335 /* major id */
3336 WRITE32(major_id_sz);
3337 WRITEMEM(major_id, major_id_sz);
3338
3339 /* Server scope */
3340 WRITE32(server_scope_sz);
3341 WRITEMEM(server_scope, server_scope_sz);
3342
3343 /* Implementation id */
3344 WRITE32(0); /* zero length nfs_impl_id4 array */
3345 ADJUST_ARGS();
3346 return 0;
2db134eb
AA		 3347}
3348
3349static __be32
57b7b43b 3350nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3351 struct nfsd4_create_session *sess)
3352{
bc749ca4 3353 __be32 *p;
ec6b5d7b
AA		 3354
3355 if (nfserr)
3356 return nfserr;
3357
3358 RESERVE_SPACE(24);
3359 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3360 WRITE32(sess->seqid);
3361 WRITE32(sess->flags);
3362 ADJUST_ARGS();
3363
3364 RESERVE_SPACE(28);
3365 WRITE32(0); /* headerpadsz */
3366 WRITE32(sess->fore_channel.maxreq_sz);
3367 WRITE32(sess->fore_channel.maxresp_sz);
3368 WRITE32(sess->fore_channel.maxresp_cached);
3369 WRITE32(sess->fore_channel.maxops);
3370 WRITE32(sess->fore_channel.maxreqs);
3371 WRITE32(sess->fore_channel.nr_rdma_attrs);
3372 ADJUST_ARGS();
3373
3374 if (sess->fore_channel.nr_rdma_attrs) {
3375 RESERVE_SPACE(4);
3376 WRITE32(sess->fore_channel.rdma_attrs);
3377 ADJUST_ARGS();
3378 }
3379
3380 RESERVE_SPACE(28);
3381 WRITE32(0); /* headerpadsz */
3382 WRITE32(sess->back_channel.maxreq_sz);
3383 WRITE32(sess->back_channel.maxresp_sz);
3384 WRITE32(sess->back_channel.maxresp_cached);
3385 WRITE32(sess->back_channel.maxops);
3386 WRITE32(sess->back_channel.maxreqs);
3387 WRITE32(sess->back_channel.nr_rdma_attrs);
3388 ADJUST_ARGS();
3389
3390 if (sess->back_channel.nr_rdma_attrs) {
3391 RESERVE_SPACE(4);
3392 WRITE32(sess->back_channel.rdma_attrs);
3393 ADJUST_ARGS();
3394 }
3395 return 0;
2db134eb
AA		 3396}
3397
3398static __be32
57b7b43b 3399nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3400 struct nfsd4_destroy_session *destroy_session)
3401{
2db134eb
AA		 3402 return nfserr;
3403}
3404
e1ca12df 3405static __be32
d1829b38 3406nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
e1ca12df
BS		 3407 struct nfsd4_free_stateid *free_stateid)
3408{
3409 __be32 *p;
3410
3411 if (nfserr)
3412 return nfserr;
3413
3414 RESERVE_SPACE(4);
d1829b38 3415 *p++ = nfserr;
e1ca12df
BS		 3416 ADJUST_ARGS();
3417 return nfserr;
3418}
3419
c47d832b 3420static __be32
57b7b43b 3421nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3422 struct nfsd4_sequence *seq)
3423{
bc749ca4 3424 __be32 *p;
b85d4c01
BH		 3425
3426 if (nfserr)
3427 return nfserr;
3428
3429 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3430 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3431 WRITE32(seq->seqid);
3432 WRITE32(seq->slotid);
b7d7ca35
BF		 3433 /* Note slotid's are numbered from zero: */
3434 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3435 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
0d7bb719 3436 WRITE32(seq->status_flags);
b85d4c01
BH		 3437
3438 ADJUST_ARGS();
557ce264 3439 resp->cstate.datap = p; /* DRC cache data pointer */
b85d4c01 3440 return 0;
2db134eb
AA		 3441}
3442
2355c596 3443static __be32
57b7b43b 3444nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3445 struct nfsd4_test_stateid *test_stateid)
3446{
03cfb420 3447 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3448 __be32 *p;
17456804 3449
03cfb420 3450 RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
17456804 3451 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3452
03cfb420 3453 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3454 *p++ = stateid->ts_id_status;
17456804 3455 }
17456804 3456
03cfb420 3457 ADJUST_ARGS();
17456804
BS		 3458 return nfserr;
3459}
3460
695e12f8
BH		 3461static __be32
3462nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3463{
3464 return nfserr;
3465}
3466
3467typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3468
2db134eb
AA		 3469/*
3470 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3471 * since we don't need to filter out obsolete ops as this is
3472 * done in the decoding phase.
3473 */
695e12f8 3474static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3475 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3476 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3477 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3478 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3479 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3480 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3481 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3482 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3483 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3484 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3485 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3486 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3487 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3488 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3489 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3490 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3491 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3492 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3493 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3494 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3495 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3496 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3497 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3498 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3499 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3500 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3501 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3502 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3503 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3504 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3505 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3506 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3507 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3508 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3509 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3510 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3511 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3512
3513 /* NFSv4.1 operations */
3514 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3515 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3516 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3517 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3518 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
e1ca12df 3519 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
2db134eb
AA		 3520 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3521 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3522 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3523 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3524 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3525 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3526 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3527 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3528 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3529 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3530 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3531 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3532 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3533};
3534
496c262c
AA		 3535/*
3536 * Calculate the total amount of memory that the compound response has taken
58e7b33a 3537 * after encoding the current operation with pad.
496c262c 3538 *
58e7b33a
MJ		 3539 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3540 * which was specified at nfsd4_operation, else pad is zero.
496c262c 3541 *
58e7b33a 3542 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
496c262c
AA		 3543 *
3544 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3545 * will be at least a page and will therefore hold the xdr_buf head.
3546 */
57b7b43b 3547__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
496c262c 3548{
496c262c 3549 struct xdr_buf *xb = &resp->rqstp->rq_res;
496c262c
AA		 3550 struct nfsd4_session *session = NULL;
3551 struct nfsd4_slot *slot = resp->cstate.slot;
58e7b33a 3552 u32 length, tlen = 0;
496c262c
AA		 3553
3554 if (!nfsd4_has_session(&resp->cstate))
58e7b33a 3555 return 0;
496c262c
AA		 3556
3557 session = resp->cstate.session;
58e7b33a
MJ		 3558 if (session == NULL)
3559 return 0;
496c262c
AA		 3560
3561 if (xb->page_len == 0) {
3562 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3563 } else {
3564 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3565 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3566
3567 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3568 }
3569 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3570 length, xb->page_len, tlen, pad);
3571
58e7b33a
MJ		 3572 if (length > session->se_fchannel.maxresp_sz)
3573 return nfserr_rep_too_big;
3574
73e79482 3575 if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
58e7b33a 3576 length > session->se_fchannel.maxresp_cached)
496c262c 3577 return nfserr_rep_too_big_to_cache;
58e7b33a
MJ		 3578
3579 return 0;
496c262c
AA		 3580}
3581
1da177e4
LT		 3582void
3583nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3584{
2ebbc012 3585 __be32 *statp;
bc749ca4 3586 __be32 *p;
1da177e4
LT		 3587
3588 RESERVE_SPACE(8);
3589 WRITE32(op->opnum);
3590 statp = p++; /* to be backfilled at the end */
3591 ADJUST_ARGS();
3592
695e12f8
BH		 3593 if (op->opnum == OP_ILLEGAL)
3594 goto status;
3595 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3596 !nfsd4_enc_ops[op->opnum]);
3597 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
496c262c 3598 /* nfsd4_check_drc_limit guarantees enough room for error status */
58e7b33a
MJ		 3599 if (!op->status)
3600 op->status = nfsd4_check_resp_size(resp, 0);
695e12f8 3601status:
1da177e4
LT		 3602 /*
3603 * Note: We write the status directly, instead of using WRITE32(),
3604 * since it is already in network byte order.
3605 */
3606 *statp = op->status;
3607}
3608
3609/*
3610 * Encode the reply stored in the stateowner reply cache
3611 *
3612 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3613 * previously sent already encoded operation.
3614 *
3615 * called with nfs4_lock_state() held
3616 */
3617void
3618nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3619{
bc749ca4 3620 __be32 *p;
1da177e4
LT		 3621 struct nfs4_replay *rp = op->replay;
3622
3623 BUG_ON(!rp);
3624
3625 RESERVE_SPACE(8);
3626 WRITE32(op->opnum);
3627 *p++ = rp->rp_status; /* already xdr'ed */
3628 ADJUST_ARGS();
3629
3630 RESERVE_SPACE(rp->rp_buflen);
3631 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3632 ADJUST_ARGS();
3633}
3634
1da177e4 3635int
2ebbc012 3636nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3637{
3638 return xdr_ressize_check(rqstp, p);
3639}
3640
3e98abff 3641int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3642{
3e98abff
BF		 3643 struct svc_rqst *rqstp = rq;
3644 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3645
1da177e4
LT		 3646 if (args->ops != args->iops) {
3647 kfree(args->ops);
3648 args->ops = args->iops;
3649 }
f99d49ad
JJ		 3650 kfree(args->tmpp);
3651 args->tmpp = NULL;
1da177e4
LT		 3652 while (args->to_free) {
3653 struct tmpbuf *tb = args->to_free;
3654 args->to_free = tb->next;
3655 tb->release(tb->buf);
3656 kfree(tb);
3657 }
3e98abff 3658 return 1;
1da177e4
LT		 3659}
3660
3661int
2ebbc012 3662nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3663{
1da177e4
LT		 3664 args->p = p;
3665 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3666 args->pagelist = rqstp->rq_arg.pages;
3667 args->pagelen = rqstp->rq_arg.page_len;
3668 args->tmpp = NULL;
3669 args->to_free = NULL;
3670 args->ops = args->iops;
3671 args->rqstp = rqstp;
3672
3e98abff 3673 return !nfsd4_decode_compound(args);
1da177e4
LT		 3674}
3675
3676int
2ebbc012 3677nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3678{
3679 /*
3680 * All that remains is to write the tag and operation count...
3681 */
557ce264 3682 struct nfsd4_compound_state *cs = &resp->cstate;
1da177e4
LT		 3683 struct kvec *iov;
3684 p = resp->tagp;
3685 *p++ = htonl(resp->taglen);
3686 memcpy(p, resp->tag, resp->taglen);
3687 p += XDR_QUADLEN(resp->taglen);
3688 *p++ = htonl(resp->opcnt);
3689
3690 if (rqstp->rq_res.page_len)
3691 iov = &rqstp->rq_res.tail[0];
3692 else
3693 iov = &rqstp->rq_res.head[0];
3694 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3695 BUG_ON(iov->iov_len > PAGE_SIZE);
26c0c75e
BF		 3696 if (nfsd4_has_session(cs)) {
3697 if (cs->status != nfserr_replay_cache) {
3698 nfsd4_store_cache_entry(resp);
73e79482 3699 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 3700 }
d7682988
BH		 3701 /* Renew the clientid on success and on replay */
3702 release_session_client(cs->session);
76407f76 3703 nfsd4_put_session(cs->session);
da3846a2 3704 }
1da177e4
LT		 3705 return 1;
3706}
3707
3708/*
3709 * Local variables:
3710 * c-basic-offset: 8
3711 * End:
3712 */
Linux 6.x block layer and io_uring tree(s)