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nfsd41: provide support for minor version 1 at rpc level
[deliverable/linux.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
43#include <linux/param.h>
44#include <linux/smp.h>
1da177e4
LT		 45#include <linux/fs.h>
46#include <linux/namei.h>
47#include <linux/vfs.h>
0733d213 48#include <linux/utsname.h>
1da177e4
LT		 49#include <linux/sunrpc/xdr.h>
50#include <linux/sunrpc/svc.h>
51#include <linux/sunrpc/clnt.h>
52#include <linux/nfsd/nfsd.h>
53#include <linux/nfsd/state.h>
54#include <linux/nfsd/xdr4.h>
55#include <linux/nfsd_idmap.h>
56#include <linux/nfs4.h>
57#include <linux/nfs4_acl.h>
dcb488a3 58#include <linux/sunrpc/gss_api.h>
4796f457 59#include <linux/sunrpc/svcauth_gss.h>
1da177e4
LT		 60
61#define NFSDDBG_FACILITY NFSDDBG_XDR
62
42ca0993
BF		 63/*
64 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
65 * directory in order to indicate to the client that a filesystem boundary is present
66 * We use a fixed fsid for a referral
67 */
68#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
69#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
70
b37ad28b
AV		 71static __be32
72check_filename(char *str, int len, __be32 err)
1da177e4
LT		 73{
74 int i;
75
76 if (len == 0)
77 return nfserr_inval;
78 if (isdotent(str, len))
79 return err;
80 for (i = 0; i < len; i++)
81 if (str[i] == '/')
82 return err;
83 return 0;
84}
85
86/*
87 * START OF "GENERIC" DECODE ROUTINES.
88 * These may look a little ugly since they are imported from a "generic"
89 * set of XDR encode/decode routines which are intended to be shared by
90 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
91 *
92 * If the pain of reading these is too great, it should be a straightforward
93 * task to translate them into Linux-specific versions which are more
94 * consistent with the style used in NFSv2/v3...
95 */
96#define DECODE_HEAD \
2ebbc012 97 __be32 *p; \
b37ad28b 98 __be32 status
1da177e4
LT		 99#define DECODE_TAIL \
100 status = 0; \
101out: \
102 return status; \
103xdr_error: \
817cb9d4
CL		 104 dprintk("NFSD: xdr error (%s:%d)\n", \
105 __FILE__, __LINE__); \
1da177e4
LT		 106 status = nfserr_bad_xdr; \
107 goto out
108
109#define READ32(x) (x) = ntohl(*p++)
110#define READ64(x) do { \
111 (x) = (u64)ntohl(*p++) << 32; \
112 (x) |= ntohl(*p++); \
113} while (0)
114#define READTIME(x) do { \
115 p++; \
116 (x) = ntohl(*p++); \
117 p++; \
118} while (0)
119#define READMEM(x,nbytes) do { \
120 x = (char *)p; \
121 p += XDR_QUADLEN(nbytes); \
122} while (0)
123#define SAVEMEM(x,nbytes) do { \
124 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
125 savemem(argp, p, nbytes) : \
126 (char *)p)) { \
817cb9d4
CL		 127 dprintk("NFSD: xdr error (%s:%d)\n", \
128 __FILE__, __LINE__); \
1da177e4
LT		 129 goto xdr_error; \
130 } \
131 p += XDR_QUADLEN(nbytes); \
132} while (0)
133#define COPYMEM(x,nbytes) do { \
134 memcpy((x), p, nbytes); \
135 p += XDR_QUADLEN(nbytes); \
136} while (0)
137
138/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
139#define READ_BUF(nbytes) do { \
140 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
141 p = argp->p; \
142 argp->p += XDR_QUADLEN(nbytes); \
143 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 144 dprintk("NFSD: xdr error (%s:%d)\n", \
145 __FILE__, __LINE__); \
1da177e4
LT		 146 goto xdr_error; \
147 } \
148} while (0)
149
ca2a05aa 150static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 151{
152 /* We want more bytes than seem to be available.
153 * Maybe we need a new page, maybe we have just run out
154 */
ca2a05aa 155 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 156 __be32 *p;
1da177e4
LT		 157 if (avail + argp->pagelen < nbytes)
158 return NULL;
159 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
160 return NULL;
161 /* ok, we can do it with the current plus the next page */
162 if (nbytes <= sizeof(argp->tmp))
163 p = argp->tmp;
164 else {
f99d49ad 165 kfree(argp->tmpp);
1da177e4
LT		 166 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
167 if (!p)
168 return NULL;
169
170 }
ca2a05aa
BF		 171 /*
172 * The following memcpy is safe because read_buf is always
173 * called with nbytes > avail, and the two cases above both
174 * guarantee p points to at least nbytes bytes.
175 */
1da177e4
LT		 176 memcpy(p, argp->p, avail);
177 /* step to next page */
178 argp->p = page_address(argp->pagelist[0]);
179 argp->pagelist++;
180 if (argp->pagelen < PAGE_SIZE) {
181 argp->end = p + (argp->pagelen>>2);
182 argp->pagelen = 0;
183 } else {
184 argp->end = p + (PAGE_SIZE>>2);
185 argp->pagelen -= PAGE_SIZE;
186 }
187 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
188 argp->p += XDR_QUADLEN(nbytes - avail);
189 return p;
190}
191
60adfc50
AA		 192static int zero_clientid(clientid_t *clid)
193{
194 return (clid->cl_boot == 0) && (clid->cl_id == 0);
195}
196
1da177e4
LT		 197static int
198defer_free(struct nfsd4_compoundargs *argp,
199 void (*release)(const void *), void *p)
200{
201 struct tmpbuf *tb;
202
203 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
204 if (!tb)
205 return -ENOMEM;
206 tb->buf = p;
207 tb->release = release;
208 tb->next = argp->to_free;
209 argp->to_free = tb;
210 return 0;
211}
212
2ebbc012 213static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 214{
1da177e4 215 if (p == argp->tmp) {
a4db5fe5
BF		 216 p = kmalloc(nbytes, GFP_KERNEL);
217 if (!p)
218 return NULL;
1da177e4
LT		 219 memcpy(p, argp->tmp, nbytes);
220 } else {
73dff8be 221 BUG_ON(p != argp->tmpp);
1da177e4
LT		 222 argp->tmpp = NULL;
223 }
224 if (defer_free(argp, kfree, p)) {
a4db5fe5 225 kfree(p);
1da177e4
LT		 226 return NULL;
227 } else
228 return (char *)p;
229}
230
b37ad28b 231static __be32
1da177e4
LT		 232nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
233{
234 u32 bmlen;
235 DECODE_HEAD;
236
237 bmval[0] = 0;
238 bmval[1] = 0;
239
240 READ_BUF(4);
241 READ32(bmlen);
242 if (bmlen > 1000)
243 goto xdr_error;
244
245 READ_BUF(bmlen << 2);
246 if (bmlen > 0)
247 READ32(bmval[0]);
248 if (bmlen > 1)
249 READ32(bmval[1]);
250
251 DECODE_TAIL;
252}
253
b37ad28b 254static __be32
1da177e4
LT		 255nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
256 struct nfs4_acl **acl)
257{
258 int expected_len, len = 0;
259 u32 dummy32;
260 char *buf;
b8dd7b9a 261 int host_err;
1da177e4
LT		 262
263 DECODE_HEAD;
264 iattr->ia_valid = 0;
265 if ((status = nfsd4_decode_bitmap(argp, bmval)))
266 return status;
267
268 /*
f34f9242 269 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP;
1da177e4
LT		 270 * read-only attributes return ERR_INVAL.
271 */
272 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
273 return nfserr_attrnotsupp;
274 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
275 return nfserr_inval;
276
277 READ_BUF(4);
278 READ32(expected_len);
279
280 if (bmval[0] & FATTR4_WORD0_SIZE) {
281 READ_BUF(8);
282 len += 8;
283 READ64(iattr->ia_size);
284 iattr->ia_valid |= ATTR_SIZE;
285 }
286 if (bmval[0] & FATTR4_WORD0_ACL) {
28e05dd8
BF		 287 int nace;
288 struct nfs4_ace *ace;
1da177e4
LT		 289
290 READ_BUF(4); len += 4;
291 READ32(nace);
292
28e05dd8
BF		 293 if (nace > NFS4_ACL_MAX)
294 return nfserr_resource;
295
296 *acl = nfs4_acl_new(nace);
1da177e4 297 if (*acl == NULL) {
b8dd7b9a 298 host_err = -ENOMEM;
1da177e4
LT		 299 goto out_nfserr;
300 }
28e05dd8 301 defer_free(argp, kfree, *acl);
1da177e4 302
28e05dd8
BF		 303 (*acl)->naces = nace;
304 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 305 READ_BUF(16); len += 16;
28e05dd8
BF		 306 READ32(ace->type);
307 READ32(ace->flag);
308 READ32(ace->access_mask);
1da177e4
LT		 309 READ32(dummy32);
310 READ_BUF(dummy32);
311 len += XDR_QUADLEN(dummy32) << 2;
312 READMEM(buf, dummy32);
28e05dd8 313 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
b8dd7b9a 314 host_err = 0;
28e05dd8
BF		 315 if (ace->whotype != NFS4_ACL_WHO_NAMED)
316 ace->who = 0;
317 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
b8dd7b9a 318 host_err = nfsd_map_name_to_gid(argp->rqstp,
28e05dd8 319 buf, dummy32, &ace->who);
1da177e4 320 else
b8dd7b9a 321 host_err = nfsd_map_name_to_uid(argp->rqstp,
28e05dd8 322 buf, dummy32, &ace->who);
b8dd7b9a 323 if (host_err)
1da177e4 324 goto out_nfserr;
1da177e4
LT		 325 }
326 } else
327 *acl = NULL;
328 if (bmval[1] & FATTR4_WORD1_MODE) {
329 READ_BUF(4);
330 len += 4;
331 READ32(iattr->ia_mode);
332 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
333 iattr->ia_valid |= ATTR_MODE;
334 }
335 if (bmval[1] & FATTR4_WORD1_OWNER) {
336 READ_BUF(4);
337 len += 4;
338 READ32(dummy32);
339 READ_BUF(dummy32);
340 len += (XDR_QUADLEN(dummy32) << 2);
341 READMEM(buf, dummy32);
b8dd7b9a 342 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
1da177e4
LT		 343 goto out_nfserr;
344 iattr->ia_valid |= ATTR_UID;
345 }
346 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
347 READ_BUF(4);
348 len += 4;
349 READ32(dummy32);
350 READ_BUF(dummy32);
351 len += (XDR_QUADLEN(dummy32) << 2);
352 READMEM(buf, dummy32);
b8dd7b9a 353 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
1da177e4
LT		 354 goto out_nfserr;
355 iattr->ia_valid |= ATTR_GID;
356 }
357 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
358 READ_BUF(4);
359 len += 4;
360 READ32(dummy32);
361 switch (dummy32) {
362 case NFS4_SET_TO_CLIENT_TIME:
363 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
364 all 32 bits of 'nseconds'. */
365 READ_BUF(12);
366 len += 12;
367 READ32(dummy32);
368 if (dummy32)
369 return nfserr_inval;
370 READ32(iattr->ia_atime.tv_sec);
371 READ32(iattr->ia_atime.tv_nsec);
372 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
373 return nfserr_inval;
374 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
375 break;
376 case NFS4_SET_TO_SERVER_TIME:
377 iattr->ia_valid |= ATTR_ATIME;
378 break;
379 default:
380 goto xdr_error;
381 }
382 }
1da177e4
LT		 383 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
384 READ_BUF(4);
385 len += 4;
386 READ32(dummy32);
387 switch (dummy32) {
388 case NFS4_SET_TO_CLIENT_TIME:
389 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
390 all 32 bits of 'nseconds'. */
391 READ_BUF(12);
392 len += 12;
393 READ32(dummy32);
394 if (dummy32)
395 return nfserr_inval;
396 READ32(iattr->ia_mtime.tv_sec);
397 READ32(iattr->ia_mtime.tv_nsec);
398 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
399 return nfserr_inval;
400 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
401 break;
402 case NFS4_SET_TO_SERVER_TIME:
403 iattr->ia_valid |= ATTR_MTIME;
404 break;
405 default:
406 goto xdr_error;
407 }
408 }
409 if (len != expected_len)
410 goto xdr_error;
411
412 DECODE_TAIL;
413
414out_nfserr:
b8dd7b9a 415 status = nfserrno(host_err);
1da177e4
LT		 416 goto out;
417}
418
e31a1b66
BH		 419static __be32
420nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
421{
422 DECODE_HEAD;
423
424 READ_BUF(sizeof(stateid_t));
425 READ32(sid->si_generation);
426 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
427
428 DECODE_TAIL;
429}
430
b37ad28b 431static __be32
1da177e4
LT		 432nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
433{
434 DECODE_HEAD;
435
436 READ_BUF(4);
437 READ32(access->ac_req_access);
438
439 DECODE_TAIL;
440}
441
b37ad28b 442static __be32
1da177e4
LT		 443nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
444{
445 DECODE_HEAD;
446
447 close->cl_stateowner = NULL;
e31a1b66 448 READ_BUF(4);
1da177e4 449 READ32(close->cl_seqid);
e31a1b66 450 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 451
452 DECODE_TAIL;
453}
454
455
b37ad28b 456static __be32
1da177e4
LT		 457nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
458{
459 DECODE_HEAD;
460
461 READ_BUF(12);
462 READ64(commit->co_offset);
463 READ32(commit->co_count);
464
465 DECODE_TAIL;
466}
467
b37ad28b 468static __be32
1da177e4
LT		 469nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
470{
471 DECODE_HEAD;
472
473 READ_BUF(4);
474 READ32(create->cr_type);
475 switch (create->cr_type) {
476 case NF4LNK:
477 READ_BUF(4);
478 READ32(create->cr_linklen);
479 READ_BUF(create->cr_linklen);
480 SAVEMEM(create->cr_linkname, create->cr_linklen);
481 break;
482 case NF4BLK:
483 case NF4CHR:
484 READ_BUF(8);
485 READ32(create->cr_specdata1);
486 READ32(create->cr_specdata2);
487 break;
488 case NF4SOCK:
489 case NF4FIFO:
490 case NF4DIR:
491 default:
492 break;
493 }
494
495 READ_BUF(4);
496 READ32(create->cr_namelen);
497 READ_BUF(create->cr_namelen);
498 SAVEMEM(create->cr_name, create->cr_namelen);
499 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
500 return status;
501
502 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
503 goto out;
504
505 DECODE_TAIL;
506}
507
b37ad28b 508static inline __be32
1da177e4
LT		 509nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
510{
e31a1b66 511 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 512}
513
b37ad28b 514static inline __be32
1da177e4
LT		 515nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
516{
517 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
518}
519
b37ad28b 520static __be32
1da177e4
LT		 521nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
522{
523 DECODE_HEAD;
524
525 READ_BUF(4);
526 READ32(link->li_namelen);
527 READ_BUF(link->li_namelen);
528 SAVEMEM(link->li_name, link->li_namelen);
529 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
530 return status;
531
532 DECODE_TAIL;
533}
534
b37ad28b 535static __be32
1da177e4
LT		 536nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
537{
538 DECODE_HEAD;
539
3a65588a 540 lock->lk_replay_owner = NULL;
1da177e4
LT		 541 /*
542 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
543 */
544 READ_BUF(28);
545 READ32(lock->lk_type);
546 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
547 goto xdr_error;
548 READ32(lock->lk_reclaim);
549 READ64(lock->lk_offset);
550 READ64(lock->lk_length);
551 READ32(lock->lk_is_new);
552
553 if (lock->lk_is_new) {
e31a1b66 554 READ_BUF(4);
1da177e4 555 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 556 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
557 if (status)
558 return status;
559 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 560 READ32(lock->lk_new_lock_seqid);
561 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
562 READ32(lock->lk_new_owner.len);
563 READ_BUF(lock->lk_new_owner.len);
564 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
565 } else {
e31a1b66
BH		 566 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
567 if (status)
568 return status;
569 READ_BUF(4);
1da177e4
LT		 570 READ32(lock->lk_old_lock_seqid);
571 }
572
573 DECODE_TAIL;
574}
575
b37ad28b 576static __be32
1da177e4
LT		 577nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
578{
579 DECODE_HEAD;
580
581 READ_BUF(32);
582 READ32(lockt->lt_type);
583 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
584 goto xdr_error;
585 READ64(lockt->lt_offset);
586 READ64(lockt->lt_length);
587 COPYMEM(&lockt->lt_clientid, 8);
588 READ32(lockt->lt_owner.len);
589 READ_BUF(lockt->lt_owner.len);
590 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
591
60adfc50
AA		 592 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
593 return nfserr_inval;
1da177e4
LT		 594 DECODE_TAIL;
595}
596
b37ad28b 597static __be32
1da177e4
LT		 598nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
599{
600 DECODE_HEAD;
601
602 locku->lu_stateowner = NULL;
e31a1b66 603 READ_BUF(8);
1da177e4
LT		 604 READ32(locku->lu_type);
605 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
606 goto xdr_error;
607 READ32(locku->lu_seqid);
e31a1b66
BH		 608 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
609 if (status)
610 return status;
611 READ_BUF(16);
1da177e4
LT		 612 READ64(locku->lu_offset);
613 READ64(locku->lu_length);
614
615 DECODE_TAIL;
616}
617
b37ad28b 618static __be32
1da177e4
LT		 619nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
620{
621 DECODE_HEAD;
622
623 READ_BUF(4);
624 READ32(lookup->lo_len);
625 READ_BUF(lookup->lo_len);
626 SAVEMEM(lookup->lo_name, lookup->lo_len);
627 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
628 return status;
629
630 DECODE_TAIL;
631}
632
b37ad28b 633static __be32
1da177e4
LT		 634nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
635{
636 DECODE_HEAD;
637
638 memset(open->op_bmval, 0, sizeof(open->op_bmval));
639 open->op_iattr.ia_valid = 0;
640 open->op_stateowner = NULL;
641
642 /* seqid, share_access, share_deny, clientid, ownerlen */
643 READ_BUF(16 + sizeof(clientid_t));
644 READ32(open->op_seqid);
645 READ32(open->op_share_access);
646 READ32(open->op_share_deny);
647 COPYMEM(&open->op_clientid, sizeof(clientid_t));
648 READ32(open->op_owner.len);
649
650 /* owner, open_flag */
651 READ_BUF(open->op_owner.len + 4);
652 SAVEMEM(open->op_owner.data, open->op_owner.len);
653 READ32(open->op_create);
654 switch (open->op_create) {
655 case NFS4_OPEN_NOCREATE:
656 break;
657 case NFS4_OPEN_CREATE:
658 READ_BUF(4);
659 READ32(open->op_createmode);
660 switch (open->op_createmode) {
661 case NFS4_CREATE_UNCHECKED:
662 case NFS4_CREATE_GUARDED:
663 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
664 goto out;
665 break;
666 case NFS4_CREATE_EXCLUSIVE:
667 READ_BUF(8);
668 COPYMEM(open->op_verf.data, 8);
669 break;
670 default:
671 goto xdr_error;
672 }
673 break;
674 default:
675 goto xdr_error;
676 }
677
678 /* open_claim */
679 READ_BUF(4);
680 READ32(open->op_claim_type);
681 switch (open->op_claim_type) {
682 case NFS4_OPEN_CLAIM_NULL:
683 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
684 READ_BUF(4);
685 READ32(open->op_fname.len);
686 READ_BUF(open->op_fname.len);
687 SAVEMEM(open->op_fname.data, open->op_fname.len);
688 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
689 return status;
690 break;
691 case NFS4_OPEN_CLAIM_PREVIOUS:
692 READ_BUF(4);
693 READ32(open->op_delegate_type);
694 break;
695 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 696 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
697 if (status)
698 return status;
699 READ_BUF(4);
1da177e4
LT		 700 READ32(open->op_fname.len);
701 READ_BUF(open->op_fname.len);
702 SAVEMEM(open->op_fname.data, open->op_fname.len);
703 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
704 return status;
705 break;
706 default:
707 goto xdr_error;
708 }
709
710 DECODE_TAIL;
711}
712
b37ad28b 713static __be32
1da177e4
LT		 714nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
715{
716 DECODE_HEAD;
717
718 open_conf->oc_stateowner = NULL;
e31a1b66
BH		 719 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
720 if (status)
721 return status;
722 READ_BUF(4);
1da177e4
LT		 723 READ32(open_conf->oc_seqid);
724
725 DECODE_TAIL;
726}
727
b37ad28b 728static __be32
1da177e4
LT		 729nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
730{
731 DECODE_HEAD;
732
733 open_down->od_stateowner = NULL;
e31a1b66
BH		 734 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
735 if (status)
736 return status;
737 READ_BUF(12);
1da177e4
LT		 738 READ32(open_down->od_seqid);
739 READ32(open_down->od_share_access);
740 READ32(open_down->od_share_deny);
741
742 DECODE_TAIL;
743}
744
b37ad28b 745static __be32
1da177e4
LT		 746nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
747{
748 DECODE_HEAD;
749
750 READ_BUF(4);
751 READ32(putfh->pf_fhlen);
752 if (putfh->pf_fhlen > NFS4_FHSIZE)
753 goto xdr_error;
754 READ_BUF(putfh->pf_fhlen);
755 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
756
757 DECODE_TAIL;
758}
759
b37ad28b 760static __be32
1da177e4
LT		 761nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
762{
763 DECODE_HEAD;
764
e31a1b66
BH		 765 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
766 if (status)
767 return status;
768 READ_BUF(12);
1da177e4
LT		 769 READ64(read->rd_offset);
770 READ32(read->rd_length);
771
772 DECODE_TAIL;
773}
774
b37ad28b 775static __be32
1da177e4
LT		 776nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
777{
778 DECODE_HEAD;
779
780 READ_BUF(24);
781 READ64(readdir->rd_cookie);
782 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
783 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
784 READ32(readdir->rd_maxcount);
785 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
786 goto out;
787
788 DECODE_TAIL;
789}
790
b37ad28b 791static __be32
1da177e4
LT		 792nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
793{
794 DECODE_HEAD;
795
796 READ_BUF(4);
797 READ32(remove->rm_namelen);
798 READ_BUF(remove->rm_namelen);
799 SAVEMEM(remove->rm_name, remove->rm_namelen);
800 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
801 return status;
802
803 DECODE_TAIL;
804}
805
b37ad28b 806static __be32
1da177e4
LT		 807nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
808{
809 DECODE_HEAD;
810
811 READ_BUF(4);
812 READ32(rename->rn_snamelen);
813 READ_BUF(rename->rn_snamelen + 4);
814 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
815 READ32(rename->rn_tnamelen);
816 READ_BUF(rename->rn_tnamelen);
817 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
818 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
819 return status;
820 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
821 return status;
822
823 DECODE_TAIL;
824}
825
b37ad28b 826static __be32
1da177e4
LT		 827nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
828{
829 DECODE_HEAD;
830
831 READ_BUF(sizeof(clientid_t));
832 COPYMEM(clientid, sizeof(clientid_t));
833
834 DECODE_TAIL;
835}
836
dcb488a3
AA		 837static __be32
838nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
839 struct nfsd4_secinfo *secinfo)
840{
841 DECODE_HEAD;
842
843 READ_BUF(4);
844 READ32(secinfo->si_namelen);
845 READ_BUF(secinfo->si_namelen);
846 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
847 status = check_filename(secinfo->si_name, secinfo->si_namelen,
848 nfserr_noent);
849 if (status)
850 return status;
851 DECODE_TAIL;
852}
853
b37ad28b 854static __be32
1da177e4
LT		 855nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
856{
e31a1b66 857 __be32 status;
1da177e4 858
e31a1b66
BH		 859 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
860 if (status)
861 return status;
862 return nfsd4_decode_fattr(argp, setattr->sa_bmval,
863 &setattr->sa_iattr, &setattr->sa_acl);
1da177e4
LT		 864}
865
b37ad28b 866static __be32
1da177e4
LT		 867nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
868{
869 DECODE_HEAD;
870
871 READ_BUF(12);
872 COPYMEM(setclientid->se_verf.data, 8);
873 READ32(setclientid->se_namelen);
874
875 READ_BUF(setclientid->se_namelen + 8);
876 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
877 READ32(setclientid->se_callback_prog);
878 READ32(setclientid->se_callback_netid_len);
879
880 READ_BUF(setclientid->se_callback_netid_len + 4);
881 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
882 READ32(setclientid->se_callback_addr_len);
883
884 READ_BUF(setclientid->se_callback_addr_len + 4);
885 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
886 READ32(setclientid->se_callback_ident);
887
888 DECODE_TAIL;
889}
890
b37ad28b 891static __be32
1da177e4
LT		 892nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
893{
894 DECODE_HEAD;
895
896 READ_BUF(8 + sizeof(nfs4_verifier));
897 COPYMEM(&scd_c->sc_clientid, 8);
898 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
899
900 DECODE_TAIL;
901}
902
903/* Also used for NVERIFY */
b37ad28b 904static __be32
1da177e4
LT		 905nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
906{
907#if 0
908 struct nfsd4_compoundargs save = {
909 .p = argp->p,
910 .end = argp->end,
911 .rqstp = argp->rqstp,
912 };
913 u32 ve_bmval[2];
914 struct iattr ve_iattr; /* request */
915 struct nfs4_acl *ve_acl; /* request */
916#endif
917 DECODE_HEAD;
918
919 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
920 goto out;
921
922 /* For convenience's sake, we compare raw xdr'd attributes in
923 * nfsd4_proc_verify; however we still decode here just to return
924 * correct error in case of bad xdr. */
925#if 0
926 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
927 if (status == nfserr_inval) {
928 status = nfserrno(status);
929 goto out;
930 }
931#endif
932 READ_BUF(4);
933 READ32(verify->ve_attrlen);
934 READ_BUF(verify->ve_attrlen);
935 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
936
937 DECODE_TAIL;
938}
939
b37ad28b 940static __be32
1da177e4
LT		 941nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
942{
943 int avail;
944 int v;
945 int len;
946 DECODE_HEAD;
947
e31a1b66
BH		 948 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
949 if (status)
950 return status;
951 READ_BUF(16);
1da177e4
LT		 952 READ64(write->wr_offset);
953 READ32(write->wr_stable_how);
954 if (write->wr_stable_how > 2)
955 goto xdr_error;
956 READ32(write->wr_buflen);
957
958 /* Sorry .. no magic macros for this.. *
959 * READ_BUF(write->wr_buflen);
960 * SAVEMEM(write->wr_buf, write->wr_buflen);
961 */
962 avail = (char*)argp->end - (char*)argp->p;
963 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 964 dprintk("NFSD: xdr error (%s:%d)\n",
965 __FILE__, __LINE__);
1da177e4
LT		 966 goto xdr_error;
967 }
3cc03b16
N		 968 argp->rqstp->rq_vec[0].iov_base = p;
969 argp->rqstp->rq_vec[0].iov_len = avail;
1da177e4
LT		 970 v = 0;
971 len = write->wr_buflen;
3cc03b16
N		 972 while (len > argp->rqstp->rq_vec[v].iov_len) {
973 len -= argp->rqstp->rq_vec[v].iov_len;
1da177e4 974 v++;
3cc03b16 975 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1da177e4
LT		 976 argp->pagelist++;
977 if (argp->pagelen >= PAGE_SIZE) {
3cc03b16 978 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1da177e4
LT		 979 argp->pagelen -= PAGE_SIZE;
980 } else {
3cc03b16 981 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1da177e4
LT		 982 argp->pagelen -= len;
983 }
984 }
2ebbc012
AV		 985 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
986 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
3cc03b16 987 argp->rqstp->rq_vec[v].iov_len = len;
1da177e4
LT		 988 write->wr_vlen = v+1;
989
990 DECODE_TAIL;
991}
992
b37ad28b 993static __be32
1da177e4
LT		 994nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
995{
996 DECODE_HEAD;
997
998 READ_BUF(12);
999 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1000 READ32(rlockowner->rl_owner.len);
1001 READ_BUF(rlockowner->rl_owner.len);
1002 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1003
60adfc50
AA		 1004 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1005 return nfserr_inval;
1da177e4
LT		 1006 DECODE_TAIL;
1007}
1008
2db134eb
AA		 1009static __be32
1010nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1011 struct nfsd4_exchange_id *exid)
2db134eb 1012{
0733d213
AA		 1013 int dummy;
1014 DECODE_HEAD;
1015
1016 READ_BUF(NFS4_VERIFIER_SIZE);
1017 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1018
1019 READ_BUF(4);
1020 READ32(exid->clname.len);
1021
1022 READ_BUF(exid->clname.len);
1023 SAVEMEM(exid->clname.data, exid->clname.len);
1024
1025 READ_BUF(4);
1026 READ32(exid->flags);
1027
1028 /* Ignore state_protect4_a */
1029 READ_BUF(4);
1030 READ32(exid->spa_how);
1031 switch (exid->spa_how) {
1032 case SP4_NONE:
1033 break;
1034 case SP4_MACH_CRED:
1035 /* spo_must_enforce */
1036 READ_BUF(4);
1037 READ32(dummy);
1038 READ_BUF(dummy * 4);
1039 p += dummy;
1040
1041 /* spo_must_allow */
1042 READ_BUF(4);
1043 READ32(dummy);
1044 READ_BUF(dummy * 4);
1045 p += dummy;
1046 break;
1047 case SP4_SSV:
1048 /* ssp_ops */
1049 READ_BUF(4);
1050 READ32(dummy);
1051 READ_BUF(dummy * 4);
1052 p += dummy;
1053
1054 READ_BUF(4);
1055 READ32(dummy);
1056 READ_BUF(dummy * 4);
1057 p += dummy;
1058
1059 /* ssp_hash_algs<> */
1060 READ_BUF(4);
1061 READ32(dummy);
1062 READ_BUF(dummy);
1063 p += XDR_QUADLEN(dummy);
1064
1065 /* ssp_encr_algs<> */
1066 READ_BUF(4);
1067 READ32(dummy);
1068 READ_BUF(dummy);
1069 p += XDR_QUADLEN(dummy);
1070
1071 /* ssp_window and ssp_num_gss_handles */
1072 READ_BUF(8);
1073 READ32(dummy);
1074 READ32(dummy);
1075 break;
1076 default:
1077 goto xdr_error;
1078 }
1079
1080 /* Ignore Implementation ID */
1081 READ_BUF(4); /* nfs_impl_id4 array length */
1082 READ32(dummy);
1083
1084 if (dummy > 1)
1085 goto xdr_error;
1086
1087 if (dummy == 1) {
1088 /* nii_domain */
1089 READ_BUF(4);
1090 READ32(dummy);
1091 READ_BUF(dummy);
1092 p += XDR_QUADLEN(dummy);
1093
1094 /* nii_name */
1095 READ_BUF(4);
1096 READ32(dummy);
1097 READ_BUF(dummy);
1098 p += XDR_QUADLEN(dummy);
1099
1100 /* nii_date */
1101 READ_BUF(12);
1102 p += 3;
1103 }
1104 DECODE_TAIL;
2db134eb
AA		 1105}
1106
1107static __be32
1108nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1109 struct nfsd4_create_session *sess)
1110{
ec6b5d7b
AA		 1111 DECODE_HEAD;
1112
1113 u32 dummy;
1114 char *machine_name;
1115 int i;
1116 int nr_secflavs;
1117
1118 READ_BUF(16);
1119 COPYMEM(&sess->clientid, 8);
1120 READ32(sess->seqid);
1121 READ32(sess->flags);
1122
1123 /* Fore channel attrs */
1124 READ_BUF(28);
1125 READ32(dummy); /* headerpadsz is always 0 */
1126 READ32(sess->fore_channel.maxreq_sz);
1127 READ32(sess->fore_channel.maxresp_sz);
1128 READ32(sess->fore_channel.maxresp_cached);
1129 READ32(sess->fore_channel.maxops);
1130 READ32(sess->fore_channel.maxreqs);
1131 READ32(sess->fore_channel.nr_rdma_attrs);
1132 if (sess->fore_channel.nr_rdma_attrs == 1) {
1133 READ_BUF(4);
1134 READ32(sess->fore_channel.rdma_attrs);
1135 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1136 dprintk("Too many fore channel attr bitmaps!\n");
1137 goto xdr_error;
1138 }
1139
1140 /* Back channel attrs */
1141 READ_BUF(28);
1142 READ32(dummy); /* headerpadsz is always 0 */
1143 READ32(sess->back_channel.maxreq_sz);
1144 READ32(sess->back_channel.maxresp_sz);
1145 READ32(sess->back_channel.maxresp_cached);
1146 READ32(sess->back_channel.maxops);
1147 READ32(sess->back_channel.maxreqs);
1148 READ32(sess->back_channel.nr_rdma_attrs);
1149 if (sess->back_channel.nr_rdma_attrs == 1) {
1150 READ_BUF(4);
1151 READ32(sess->back_channel.rdma_attrs);
1152 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1153 dprintk("Too many back channel attr bitmaps!\n");
1154 goto xdr_error;
1155 }
1156
1157 READ_BUF(8);
1158 READ32(sess->callback_prog);
1159
1160 /* callback_sec_params4 */
1161 READ32(nr_secflavs);
1162 for (i = 0; i < nr_secflavs; ++i) {
1163 READ_BUF(4);
1164 READ32(dummy);
1165 switch (dummy) {
1166 case RPC_AUTH_NULL:
1167 /* Nothing to read */
1168 break;
1169 case RPC_AUTH_UNIX:
1170 READ_BUF(8);
1171 /* stamp */
1172 READ32(dummy);
1173
1174 /* machine name */
1175 READ32(dummy);
1176 READ_BUF(dummy);
1177 SAVEMEM(machine_name, dummy);
1178
1179 /* uid, gid */
1180 READ_BUF(8);
1181 READ32(sess->uid);
1182 READ32(sess->gid);
1183
1184 /* more gids */
1185 READ_BUF(4);
1186 READ32(dummy);
1187 READ_BUF(dummy * 4);
1188 for (i = 0; i < dummy; ++i)
1189 READ32(dummy);
1190 break;
1191 case RPC_AUTH_GSS:
1192 dprintk("RPC_AUTH_GSS callback secflavor "
1193 "not supported!\n");
1194 READ_BUF(8);
1195 /* gcbp_service */
1196 READ32(dummy);
1197 /* gcbp_handle_from_server */
1198 READ32(dummy);
1199 READ_BUF(dummy);
1200 p += XDR_QUADLEN(dummy);
1201 /* gcbp_handle_from_client */
1202 READ_BUF(4);
1203 READ32(dummy);
1204 READ_BUF(dummy);
1205 p += XDR_QUADLEN(dummy);
1206 break;
1207 default:
1208 dprintk("Illegal callback secflavor\n");
1209 return nfserr_inval;
1210 }
1211 }
1212 DECODE_TAIL;
2db134eb
AA		 1213}
1214
1215static __be32
1216nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1217 struct nfsd4_destroy_session *destroy_session)
1218{
e10e0cfc
BH		 1219 DECODE_HEAD;
1220 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1221 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1222
1223 DECODE_TAIL;
2db134eb
AA		 1224}
1225
1226static __be32
1227nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1228 struct nfsd4_sequence *seq)
1229{
b85d4c01
BH		 1230 DECODE_HEAD;
1231
1232 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1233 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1234 READ32(seq->seqid);
1235 READ32(seq->slotid);
1236 READ32(seq->maxslots);
1237 READ32(seq->cachethis);
1238
1239 DECODE_TAIL;
2db134eb
AA		 1240}
1241
347e0ad9
BH		 1242static __be32
1243nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1244{
1245 return nfs_ok;
1246}
1247
3c375c6f
BH		 1248static __be32
1249nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1250{
1e685ec2 1251 return nfserr_notsupp;
3c375c6f
BH		 1252}
1253
347e0ad9
BH		 1254typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1255
1256static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1257 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1258 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1259 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1260 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1261 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1262 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1263 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1264 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1265 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1266 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1267 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1268 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1269 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1270 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1271 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1272 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1273 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1274 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1275 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1276 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
a1c8c4d1 1277 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
ad1060c8
BF		 1278 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1279 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1280 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1281 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1282 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1283 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1284 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1285 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1286 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1287 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1288 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1289 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1290 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1291 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1292 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1293 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
347e0ad9
BH		 1294};
1295
2db134eb
AA		 1296static nfsd4_dec nfsd41_dec_ops[] = {
1297 [OP_ACCESS] (nfsd4_dec)nfsd4_decode_access,
1298 [OP_CLOSE] (nfsd4_dec)nfsd4_decode_close,
1299 [OP_COMMIT] (nfsd4_dec)nfsd4_decode_commit,
1300 [OP_CREATE] (nfsd4_dec)nfsd4_decode_create,
1301 [OP_DELEGPURGE] (nfsd4_dec)nfsd4_decode_notsupp,
1302 [OP_DELEGRETURN] (nfsd4_dec)nfsd4_decode_delegreturn,
1303 [OP_GETATTR] (nfsd4_dec)nfsd4_decode_getattr,
1304 [OP_GETFH] (nfsd4_dec)nfsd4_decode_noop,
1305 [OP_LINK] (nfsd4_dec)nfsd4_decode_link,
1306 [OP_LOCK] (nfsd4_dec)nfsd4_decode_lock,
1307 [OP_LOCKT] (nfsd4_dec)nfsd4_decode_lockt,
1308 [OP_LOCKU] (nfsd4_dec)nfsd4_decode_locku,
1309 [OP_LOOKUP] (nfsd4_dec)nfsd4_decode_lookup,
1310 [OP_LOOKUPP] (nfsd4_dec)nfsd4_decode_noop,
1311 [OP_NVERIFY] (nfsd4_dec)nfsd4_decode_verify,
1312 [OP_OPEN] (nfsd4_dec)nfsd4_decode_open,
1313 [OP_OPENATTR] (nfsd4_dec)nfsd4_decode_notsupp,
1314 [OP_OPEN_CONFIRM] (nfsd4_dec)nfsd4_decode_notsupp,
1315 [OP_OPEN_DOWNGRADE] (nfsd4_dec)nfsd4_decode_open_downgrade,
1316 [OP_PUTFH] (nfsd4_dec)nfsd4_decode_putfh,
1317 [OP_PUTPUBFH] (nfsd4_dec)nfsd4_decode_notsupp,
1318 [OP_PUTROOTFH] (nfsd4_dec)nfsd4_decode_noop,
1319 [OP_READ] (nfsd4_dec)nfsd4_decode_read,
1320 [OP_READDIR] (nfsd4_dec)nfsd4_decode_readdir,
1321 [OP_READLINK] (nfsd4_dec)nfsd4_decode_noop,
1322 [OP_REMOVE] (nfsd4_dec)nfsd4_decode_remove,
1323 [OP_RENAME] (nfsd4_dec)nfsd4_decode_rename,
1324 [OP_RENEW] (nfsd4_dec)nfsd4_decode_notsupp,
1325 [OP_RESTOREFH] (nfsd4_dec)nfsd4_decode_noop,
1326 [OP_SAVEFH] (nfsd4_dec)nfsd4_decode_noop,
1327 [OP_SECINFO] (nfsd4_dec)nfsd4_decode_secinfo,
1328 [OP_SETATTR] (nfsd4_dec)nfsd4_decode_setattr,
1329 [OP_SETCLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1330 [OP_SETCLIENTID_CONFIRM](nfsd4_dec)nfsd4_decode_notsupp,
1331 [OP_VERIFY] (nfsd4_dec)nfsd4_decode_verify,
1332 [OP_WRITE] (nfsd4_dec)nfsd4_decode_write,
1333 [OP_RELEASE_LOCKOWNER] (nfsd4_dec)nfsd4_decode_notsupp,
1334
1335 /* new operations for NFSv4.1 */
1336 [OP_BACKCHANNEL_CTL] (nfsd4_dec)nfsd4_decode_notsupp,
1337 [OP_BIND_CONN_TO_SESSION](nfsd4_dec)nfsd4_decode_notsupp,
1338 [OP_EXCHANGE_ID] (nfsd4_dec)nfsd4_decode_exchange_id,
1339 [OP_CREATE_SESSION] (nfsd4_dec)nfsd4_decode_create_session,
1340 [OP_DESTROY_SESSION] (nfsd4_dec)nfsd4_decode_destroy_session,
1341 [OP_FREE_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1342 [OP_GET_DIR_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1343 [OP_GETDEVICEINFO] (nfsd4_dec)nfsd4_decode_notsupp,
1344 [OP_GETDEVICELIST] (nfsd4_dec)nfsd4_decode_notsupp,
1345 [OP_LAYOUTCOMMIT] (nfsd4_dec)nfsd4_decode_notsupp,
1346 [OP_LAYOUTGET] (nfsd4_dec)nfsd4_decode_notsupp,
1347 [OP_LAYOUTRETURN] (nfsd4_dec)nfsd4_decode_notsupp,
1348 [OP_SECINFO_NO_NAME] (nfsd4_dec)nfsd4_decode_notsupp,
1349 [OP_SEQUENCE] (nfsd4_dec)nfsd4_decode_sequence,
1350 [OP_SET_SSV] (nfsd4_dec)nfsd4_decode_notsupp,
1351 [OP_TEST_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1352 [OP_WANT_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1353 [OP_DESTROY_CLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1354 [OP_RECLAIM_COMPLETE] (nfsd4_dec)nfsd4_decode_notsupp,
1355};
1356
f2feb96b
BH		 1357struct nfsd4_minorversion_ops {
1358 nfsd4_dec *decoders;
1359 int nops;
1360};
1361
1362static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
ad1060c8 1363 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
2db134eb 1364 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
f2feb96b
BH		 1365};
1366
b37ad28b 1367static __be32
1da177e4
LT		 1368nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1369{
1370 DECODE_HEAD;
1371 struct nfsd4_op *op;
f2feb96b 1372 struct nfsd4_minorversion_ops *ops;
1da177e4
LT		 1373 int i;
1374
1375 /*
1376 * XXX: According to spec, we should check the tag
1377 * for UTF-8 compliance. I'm postponing this for
1378 * now because it seems that some clients do use
1379 * binary tags.
1380 */
1381 READ_BUF(4);
1382 READ32(argp->taglen);
1383 READ_BUF(argp->taglen + 8);
1384 SAVEMEM(argp->tag, argp->taglen);
1385 READ32(argp->minorversion);
1386 READ32(argp->opcnt);
1387
1388 if (argp->taglen > NFSD4_MAX_TAGLEN)
1389 goto xdr_error;
1390 if (argp->opcnt > 100)
1391 goto xdr_error;
1392
e8c96f8c 1393 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1394 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1395 if (!argp->ops) {
1396 argp->ops = argp->iops;
817cb9d4 1397 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1398 goto xdr_error;
1399 }
1400 }
1401
f2feb96b 1402 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
30cff1ff
BH		 1403 argp->opcnt = 0;
1404
f2feb96b 1405 ops = &nfsd4_minorversion[argp->minorversion];
1da177e4
LT		 1406 for (i = 0; i < argp->opcnt; i++) {
1407 op = &argp->ops[i];
1408 op->replay = NULL;
1409
1410 /*
1411 * We can't use READ_BUF() here because we need to handle
1412 * a missing opcode as an OP_WRITE + 1. So we need to check
1413 * to see if we're truly at the end of our buffer or if there
1414 * is another page we need to flip to.
1415 */
1416
1417 if (argp->p == argp->end) {
1418 if (argp->pagelen < 4) {
1419 /* There isn't an opcode still on the wire */
1420 op->opnum = OP_WRITE + 1;
1421 op->status = nfserr_bad_xdr;
1422 argp->opcnt = i+1;
1423 break;
1424 }
1425
1426 /*
1427 * False alarm. We just hit a page boundary, but there
1428 * is still data available. Move pointer across page
1429 * boundary. *snip from READ_BUF*
1430 */
1431 argp->p = page_address(argp->pagelist[0]);
1432 argp->pagelist++;
1433 if (argp->pagelen < PAGE_SIZE) {
1434 argp->end = p + (argp->pagelen>>2);
1435 argp->pagelen = 0;
1436 } else {
1437 argp->end = p + (PAGE_SIZE>>2);
1438 argp->pagelen -= PAGE_SIZE;
1439 }
1440 }
1441 op->opnum = ntohl(*argp->p++);
1442
f2feb96b
BH		 1443 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1444 op->status = ops->decoders[op->opnum](argp, &op->u);
347e0ad9 1445 else {
1da177e4
LT		 1446 op->opnum = OP_ILLEGAL;
1447 op->status = nfserr_op_illegal;
1da177e4
LT		 1448 }
1449
1450 if (op->status) {
1451 argp->opcnt = i+1;
1452 break;
1453 }
1454 }
1455
1456 DECODE_TAIL;
1457}
1458/*
1459 * END OF "GENERIC" DECODE ROUTINES.
1460 */
1461
1462/*
1463 * START OF "GENERIC" ENCODE ROUTINES.
1464 * These may look a little ugly since they are imported from a "generic"
1465 * set of XDR encode/decode routines which are intended to be shared by
1466 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1467 *
1468 * If the pain of reading these is too great, it should be a straightforward
1469 * task to translate them into Linux-specific versions which are more
1470 * consistent with the style used in NFSv2/v3...
1471 */
2ebbc012 1472#define ENCODE_HEAD __be32 *p
1da177e4
LT		 1473
1474#define WRITE32(n) *p++ = htonl(n)
1475#define WRITE64(n) do { \
1476 *p++ = htonl((u32)((n) >> 32)); \
1477 *p++ = htonl((u32)(n)); \
1478} while (0)
5108b276 1479#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1480 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1481 memcpy(p, ptr, nbytes); \
1482 p += XDR_QUADLEN(nbytes); \
5108b276 1483}} while (0)
1da177e4
LT		 1484#define WRITECINFO(c) do { \
1485 *p++ = htonl(c.atomic); \
1486 *p++ = htonl(c.before_ctime_sec); \
1487 *p++ = htonl(c.before_ctime_nsec); \
1488 *p++ = htonl(c.after_ctime_sec); \
1489 *p++ = htonl(c.after_ctime_nsec); \
1490} while (0)
1491
1492#define RESERVE_SPACE(nbytes) do { \
1493 p = resp->p; \
1494 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1495} while (0)
1496#define ADJUST_ARGS() resp->p = p
1497
1498/*
1499 * Header routine to setup seqid operation replay cache
1500 */
1501#define ENCODE_SEQID_OP_HEAD \
2ebbc012 1502 __be32 *save; \
1da177e4
LT		 1503 \
1504 save = resp->p;
1505
1506/*
7fb64cee
N		 1507 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1508 * is where sequence id's are incremented, and the replay cache is filled.
1509 * Note that we increment sequence id's here, at the last moment, so we're sure
1510 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1511 */
1512
1513#define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1514 if (seqid_mutating_err(nfserr) && stateowner) { \
bd9aac52 1515 stateowner->so_seqid++; \
1da177e4
LT		 1516 stateowner->so_replay.rp_status = nfserr; \
1517 stateowner->so_replay.rp_buflen = \
1518 (((char *)(resp)->p - (char *)save)); \
1519 memcpy(stateowner->so_replay.rp_buf, save, \
1520 stateowner->so_replay.rp_buflen); \
1521 } } while (0);
1522
81c3f413
BF		 1523/* Encode as an array of strings the string given with components
1524 * seperated @sep.
1525 */
b37ad28b 1526static __be32 nfsd4_encode_components(char sep, char *components,
2ebbc012 1527 __be32 **pp, int *buflen)
81c3f413 1528{
2ebbc012
AV		 1529 __be32 *p = *pp;
1530 __be32 *countp = p;
81c3f413
BF		 1531 int strlen, count=0;
1532 char *str, *end;
1533
1534 dprintk("nfsd4_encode_components(%s)\n", components);
1535 if ((*buflen -= 4) < 0)
1536 return nfserr_resource;
1537 WRITE32(0); /* We will fill this in with @count later */
1538 end = str = components;
1539 while (*end) {
1540 for (; *end && (*end != sep); end++)
1541 ; /* Point to end of component */
1542 strlen = end - str;
1543 if (strlen) {
1544 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1545 return nfserr_resource;
1546 WRITE32(strlen);
1547 WRITEMEM(str, strlen);
1548 count++;
1549 }
1550 else
1551 end++;
1552 str = end;
1553 }
1554 *pp = p;
1555 p = countp;
1556 WRITE32(count);
1557 return 0;
1558}
1559
1560/*
1561 * encode a location element of a fs_locations structure
1562 */
b37ad28b 1563static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1564 __be32 **pp, int *buflen)
81c3f413 1565{
b37ad28b 1566 __be32 status;
2ebbc012 1567 __be32 *p = *pp;
81c3f413
BF		 1568
1569 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1570 if (status)
1571 return status;
1572 status = nfsd4_encode_components('/', location->path, &p, buflen);
1573 if (status)
1574 return status;
1575 *pp = p;
1576 return 0;
1577}
1578
1579/*
1580 * Return the path to an export point in the pseudo filesystem namespace
1581 * Returned string is safe to use as long as the caller holds a reference
1582 * to @exp.
1583 */
b37ad28b 1584static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
81c3f413
BF		 1585{
1586 struct svc_fh tmp_fh;
1587 char *path, *rootpath;
81c3f413
BF		 1588
1589 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb 1590 *stat = exp_pseudoroot(rqstp, &tmp_fh);
cc45f017
AV		 1591 if (*stat)
1592 return NULL;
54775491 1593 rootpath = tmp_fh.fh_export->ex_pathname;
81c3f413 1594
54775491 1595 path = exp->ex_pathname;
81c3f413
BF		 1596
1597 if (strncmp(path, rootpath, strlen(rootpath))) {
817cb9d4 1598 dprintk("nfsd: fs_locations failed;"
81c3f413 1599 "%s is not contained in %s\n", path, rootpath);
cc45f017
AV		 1600 *stat = nfserr_notsupp;
1601 return NULL;
81c3f413
BF		 1602 }
1603
1604 return path + strlen(rootpath);
1605}
1606
1607/*
1608 * encode a fs_locations structure
1609 */
b37ad28b 1610static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1611 struct svc_export *exp,
2ebbc012 1612 __be32 **pp, int *buflen)
81c3f413 1613{
b37ad28b 1614 __be32 status;
cc45f017 1615 int i;
2ebbc012 1616 __be32 *p = *pp;
81c3f413 1617 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
cc45f017 1618 char *root = nfsd4_path(rqstp, exp, &status);
81c3f413 1619
cc45f017
AV		 1620 if (status)
1621 return status;
81c3f413
BF		 1622 status = nfsd4_encode_components('/', root, &p, buflen);
1623 if (status)
1624 return status;
1625 if ((*buflen -= 4) < 0)
1626 return nfserr_resource;
1627 WRITE32(fslocs->locations_count);
1628 for (i=0; i<fslocs->locations_count; i++) {
1629 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1630 &p, buflen);
1631 if (status)
1632 return status;
1633 }
1634 *pp = p;
1635 return 0;
1636}
1da177e4
LT		 1637
1638static u32 nfs4_ftypes[16] = {
1639 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1640 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1641 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1642 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1643};
1644
b37ad28b 1645static __be32
1da177e4 1646nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1647 __be32 **p, int *buflen)
1da177e4
LT		 1648{
1649 int status;
1650
1651 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1652 return nfserr_resource;
1653 if (whotype != NFS4_ACL_WHO_NAMED)
1654 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1655 else if (group)
1656 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1657 else
1658 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1659 if (status < 0)
1660 return nfserrno(status);
1661 *p = xdr_encode_opaque(*p, NULL, status);
1662 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1663 BUG_ON(*buflen < 0);
1664 return 0;
1665}
1666
b37ad28b 1667static inline __be32
2ebbc012 1668nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1da177e4
LT		 1669{
1670 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1671}
1672
b37ad28b 1673static inline __be32
2ebbc012 1674nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1da177e4
LT		 1675{
1676 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1677}
1678
b37ad28b 1679static inline __be32
1da177e4 1680nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1681 __be32 **p, int *buflen)
1da177e4
LT		 1682{
1683 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1684}
1685
42ca0993
BF		 1686#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1687 FATTR4_WORD0_RDATTR_ERROR)
1688#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1689
b37ad28b 1690static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1691{
1692 /* As per referral draft: */
1693 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1694 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1695 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1696 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1697 *rdattr_err = NFSERR_MOVED;
1698 else
1699 return nfserr_moved;
1700 }
1701 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1702 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1703 return 0;
1704}
1da177e4
LT		 1705
1706/*
1707 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1708 * ourselves.
1709 *
1710 * @countp is the buffer size in _words_; upon successful return this becomes
1711 * replaced with the number of words written.
1712 */
b37ad28b 1713__be32
1da177e4 1714nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2ebbc012 1715 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
406a7ea9 1716 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 1717{
1718 u32 bmval0 = bmval[0];
1719 u32 bmval1 = bmval[1];
1720 struct kstat stat;
1721 struct svc_fh tempfh;
1722 struct kstatfs statfs;
1723 int buflen = *countp << 2;
2ebbc012 1724 __be32 *attrlenp;
1da177e4
LT		 1725 u32 dummy;
1726 u64 dummy64;
42ca0993 1727 u32 rdattr_err = 0;
2ebbc012 1728 __be32 *p = buffer;
b37ad28b 1729 __be32 status;
b8dd7b9a 1730 int err;
1da177e4
LT		 1731 int aclsupport = 0;
1732 struct nfs4_acl *acl = NULL;
1733
1734 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1735 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1736 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1737
42ca0993
BF		 1738 if (exp->ex_fslocs.migrated) {
1739 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1740 if (status)
1741 goto out;
1742 }
1743
54775491 1744 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
b8dd7b9a 1745 if (err)
1da177e4 1746 goto out_nfserr;
a16e92ed
BF		 1747 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1748 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 1749 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1750 FATTR4_WORD1_SPACE_TOTAL))) {
b8dd7b9a
AV		 1751 err = vfs_statfs(dentry, &statfs);
1752 if (err)
1da177e4
LT		 1753 goto out_nfserr;
1754 }
1755 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1756 fh_init(&tempfh, NFS4_FHSIZE);
1757 status = fh_compose(&tempfh, exp, dentry, NULL);
1758 if (status)
1759 goto out;
1760 fhp = &tempfh;
1761 }
1762 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1763 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 1764 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1765 aclsupport = (err == 0);
1da177e4 1766 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 1767 if (err == -EOPNOTSUPP)
1da177e4 1768 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 1769 else if (err == -EINVAL) {
1da177e4
LT		 1770 status = nfserr_attrnotsupp;
1771 goto out;
b8dd7b9a 1772 } else if (err != 0)
1da177e4
LT		 1773 goto out_nfserr;
1774 }
1775 }
81c3f413
BF		 1776 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1777 if (exp->ex_fslocs.locations == NULL) {
1778 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1779 }
1780 }
1da177e4
LT		 1781 if ((buflen -= 16) < 0)
1782 goto out_resource;
1783
1784 WRITE32(2);
1785 WRITE32(bmval0);
1786 WRITE32(bmval1);
1787 attrlenp = p++; /* to be backfilled later */
1788
1789 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
42ca0993 1790 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1da177e4
LT		 1791 if ((buflen -= 12) < 0)
1792 goto out_resource;
42ca0993
BF		 1793 if (!aclsupport)
1794 word0 &= ~FATTR4_WORD0_ACL;
1795 if (!exp->ex_fslocs.locations)
1796 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1da177e4 1797 WRITE32(2);
42ca0993 1798 WRITE32(word0);
1da177e4
LT		 1799 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1800 }
1801 if (bmval0 & FATTR4_WORD0_TYPE) {
1802 if ((buflen -= 4) < 0)
1803 goto out_resource;
1804 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1805 if (dummy == NF4BAD)
1806 goto out_serverfault;
1807 WRITE32(dummy);
1808 }
1809 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1810 if ((buflen -= 4) < 0)
1811 goto out_resource;
49640001 1812 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 1813 WRITE32(NFS4_FH_PERSISTENT);
49640001 1814 else
e34ac862 1815 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 1816 }
1817 if (bmval0 & FATTR4_WORD0_CHANGE) {
1818 /*
1819 * Note: This _must_ be consistent with the scheme for writing
1820 * change_info, so any changes made here must be reflected there
1821 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1822 * macro above.)
1823 */
1824 if ((buflen -= 8) < 0)
1825 goto out_resource;
1826 WRITE32(stat.ctime.tv_sec);
1827 WRITE32(stat.ctime.tv_nsec);
1828 }
1829 if (bmval0 & FATTR4_WORD0_SIZE) {
1830 if ((buflen -= 8) < 0)
1831 goto out_resource;
1832 WRITE64(stat.size);
1833 }
1834 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1835 if ((buflen -= 4) < 0)
1836 goto out_resource;
1837 WRITE32(1);
1838 }
1839 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1840 if ((buflen -= 4) < 0)
1841 goto out_resource;
1842 WRITE32(1);
1843 }
1844 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1845 if ((buflen -= 4) < 0)
1846 goto out_resource;
1847 WRITE32(0);
1848 }
1849 if (bmval0 & FATTR4_WORD0_FSID) {
1850 if ((buflen -= 16) < 0)
1851 goto out_resource;
42ca0993
BF		 1852 if (exp->ex_fslocs.migrated) {
1853 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1854 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 1855 } else switch(fsid_source(fhp)) {
1856 case FSIDSOURCE_FSID:
1da177e4
LT		 1857 WRITE64((u64)exp->ex_fsid);
1858 WRITE64((u64)0);
af6a4e28
N		 1859 break;
1860 case FSIDSOURCE_DEV:
1da177e4
LT		 1861 WRITE32(0);
1862 WRITE32(MAJOR(stat.dev));
1863 WRITE32(0);
1864 WRITE32(MINOR(stat.dev));
af6a4e28
N		 1865 break;
1866 case FSIDSOURCE_UUID:
1867 WRITEMEM(exp->ex_uuid, 16);
1868 break;
1da177e4
LT		 1869 }
1870 }
1871 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1872 if ((buflen -= 4) < 0)
1873 goto out_resource;
1874 WRITE32(0);
1875 }
1876 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1877 if ((buflen -= 4) < 0)
1878 goto out_resource;
1879 WRITE32(NFSD_LEASE_TIME);
1880 }
1881 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1882 if ((buflen -= 4) < 0)
1883 goto out_resource;
42ca0993 1884 WRITE32(rdattr_err);
1da177e4
LT		 1885 }
1886 if (bmval0 & FATTR4_WORD0_ACL) {
1887 struct nfs4_ace *ace;
1da177e4
LT		 1888
1889 if (acl == NULL) {
1890 if ((buflen -= 4) < 0)
1891 goto out_resource;
1892
1893 WRITE32(0);
1894 goto out_acl;
1895 }
1896 if ((buflen -= 4) < 0)
1897 goto out_resource;
1898 WRITE32(acl->naces);
1899
28e05dd8 1900 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 1901 if ((buflen -= 4*3) < 0)
1902 goto out_resource;
1903 WRITE32(ace->type);
1904 WRITE32(ace->flag);
1905 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1906 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1907 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1908 &p, &buflen);
1909 if (status == nfserr_resource)
1910 goto out_resource;
1911 if (status)
1912 goto out;
1913 }
1914 }
1915out_acl:
1916 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1917 if ((buflen -= 4) < 0)
1918 goto out_resource;
1919 WRITE32(aclsupport ?
1920 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1921 }
1922 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1923 if ((buflen -= 4) < 0)
1924 goto out_resource;
1925 WRITE32(1);
1926 }
1927 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1928 if ((buflen -= 4) < 0)
1929 goto out_resource;
1930 WRITE32(1);
1931 }
1932 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1933 if ((buflen -= 4) < 0)
1934 goto out_resource;
1935 WRITE32(1);
1936 }
1937 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1938 if ((buflen -= 4) < 0)
1939 goto out_resource;
1940 WRITE32(1);
1941 }
1942 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1943 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1944 if (buflen < 0)
1945 goto out_resource;
1946 WRITE32(fhp->fh_handle.fh_size);
1947 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1948 }
1949 if (bmval0 & FATTR4_WORD0_FILEID) {
1950 if ((buflen -= 8) < 0)
1951 goto out_resource;
40ee5dc6 1952 WRITE64(stat.ino);
1da177e4
LT		 1953 }
1954 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1955 if ((buflen -= 8) < 0)
1956 goto out_resource;
1957 WRITE64((u64) statfs.f_ffree);
1958 }
1959 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1960 if ((buflen -= 8) < 0)
1961 goto out_resource;
1962 WRITE64((u64) statfs.f_ffree);
1963 }
1964 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1965 if ((buflen -= 8) < 0)
1966 goto out_resource;
1967 WRITE64((u64) statfs.f_files);
1968 }
81c3f413
BF		 1969 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1970 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1971 if (status == nfserr_resource)
1972 goto out_resource;
1973 if (status)
1974 goto out;
1975 }
1da177e4
LT		 1976 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1977 if ((buflen -= 4) < 0)
1978 goto out_resource;
1979 WRITE32(1);
1980 }
1981 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1982 if ((buflen -= 8) < 0)
1983 goto out_resource;
1984 WRITE64(~(u64)0);
1985 }
1986 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1987 if ((buflen -= 4) < 0)
1988 goto out_resource;
1989 WRITE32(255);
1990 }
1991 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1992 if ((buflen -= 4) < 0)
1993 goto out_resource;
a16e92ed 1994 WRITE32(statfs.f_namelen);
1da177e4
LT		 1995 }
1996 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1997 if ((buflen -= 8) < 0)
1998 goto out_resource;
7adae489 1999 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2000 }
2001 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2002 if ((buflen -= 8) < 0)
2003 goto out_resource;
7adae489 2004 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2005 }
2006 if (bmval1 & FATTR4_WORD1_MODE) {
2007 if ((buflen -= 4) < 0)
2008 goto out_resource;
2009 WRITE32(stat.mode & S_IALLUGO);
2010 }
2011 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2012 if ((buflen -= 4) < 0)
2013 goto out_resource;
2014 WRITE32(1);
2015 }
2016 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2017 if ((buflen -= 4) < 0)
2018 goto out_resource;
2019 WRITE32(stat.nlink);
2020 }
2021 if (bmval1 & FATTR4_WORD1_OWNER) {
2022 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2023 if (status == nfserr_resource)
2024 goto out_resource;
2025 if (status)
2026 goto out;
2027 }
2028 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2029 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2030 if (status == nfserr_resource)
2031 goto out_resource;
2032 if (status)
2033 goto out;
2034 }
2035 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2036 if ((buflen -= 8) < 0)
2037 goto out_resource;
2038 WRITE32((u32) MAJOR(stat.rdev));
2039 WRITE32((u32) MINOR(stat.rdev));
2040 }
2041 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2042 if ((buflen -= 8) < 0)
2043 goto out_resource;
2044 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2045 WRITE64(dummy64);
2046 }
2047 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2048 if ((buflen -= 8) < 0)
2049 goto out_resource;
2050 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2051 WRITE64(dummy64);
2052 }
2053 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2054 if ((buflen -= 8) < 0)
2055 goto out_resource;
2056 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2057 WRITE64(dummy64);
2058 }
2059 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2060 if ((buflen -= 8) < 0)
2061 goto out_resource;
2062 dummy64 = (u64)stat.blocks << 9;
2063 WRITE64(dummy64);
2064 }
2065 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2066 if ((buflen -= 12) < 0)
2067 goto out_resource;
2068 WRITE32(0);
2069 WRITE32(stat.atime.tv_sec);
2070 WRITE32(stat.atime.tv_nsec);
2071 }
2072 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2073 if ((buflen -= 12) < 0)
2074 goto out_resource;
2075 WRITE32(0);
2076 WRITE32(1);
2077 WRITE32(0);
2078 }
2079 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2080 if ((buflen -= 12) < 0)
2081 goto out_resource;
2082 WRITE32(0);
2083 WRITE32(stat.ctime.tv_sec);
2084 WRITE32(stat.ctime.tv_nsec);
2085 }
2086 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2087 if ((buflen -= 12) < 0)
2088 goto out_resource;
2089 WRITE32(0);
2090 WRITE32(stat.mtime.tv_sec);
2091 WRITE32(stat.mtime.tv_nsec);
2092 }
2093 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 2094 if ((buflen -= 8) < 0)
2095 goto out_resource;
406a7ea9
FF		 2096 /*
2097 * Get parent's attributes if not ignoring crossmount
2098 * and this is the root of a cross-mounted filesystem.
2099 */
2100 if (ignore_crossmnt == 0 &&
54775491
JB		 2101 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
2102 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
2103 exp->ex_path.mnt->mnt_mountpoint, &stat);
40ee5dc6
PS		 2104 if (err)
2105 goto out_nfserr;
2106 }
2107 WRITE64(stat.ino);
1da177e4
LT		 2108 }
2109 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2110 *countp = p - buffer;
2111 status = nfs_ok;
2112
2113out:
28e05dd8 2114 kfree(acl);
1da177e4
LT		 2115 if (fhp == &tempfh)
2116 fh_put(&tempfh);
2117 return status;
2118out_nfserr:
b8dd7b9a 2119 status = nfserrno(err);
1da177e4
LT		 2120 goto out;
2121out_resource:
2122 *countp = 0;
2123 status = nfserr_resource;
2124 goto out;
2125out_serverfault:
2126 status = nfserr_serverfault;
2127 goto out;
2128}
2129
c0ce6ec8
BF		 2130static inline int attributes_need_mount(u32 *bmval)
2131{
2132 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2133 return 1;
2134 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2135 return 1;
2136 return 0;
2137}
2138
b37ad28b 2139static __be32
1da177e4 2140nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2ebbc012 2141 const char *name, int namlen, __be32 *p, int *buflen)
1da177e4
LT		 2142{
2143 struct svc_export *exp = cd->rd_fhp->fh_export;
2144 struct dentry *dentry;
b37ad28b 2145 __be32 nfserr;
406a7ea9 2146 int ignore_crossmnt = 0;
1da177e4
LT		 2147
2148 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2149 if (IS_ERR(dentry))
2150 return nfserrno(PTR_ERR(dentry));
2151
2152 exp_get(exp);
406a7ea9
FF		 2153 /*
2154 * In the case of a mountpoint, the client may be asking for
2155 * attributes that are only properties of the underlying filesystem
2156 * as opposed to the cross-mounted file system. In such a case,
2157 * we will not follow the cross mount and will fill the attribtutes
2158 * directly from the mountpoint dentry.
2159 */
c0ce6ec8 2160 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
406a7ea9
FF		 2161 ignore_crossmnt = 1;
2162 else if (d_mountpoint(dentry)) {
021d3a72
BF		 2163 int err;
2164
dcb488a3
AA		 2165 /*
2166 * Why the heck aren't we just using nfsd_lookup??
2167 * Different "."/".." handling? Something else?
2168 * At least, add a comment here to explain....
2169 */
021d3a72
BF		 2170 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2171 if (err) {
2172 nfserr = nfserrno(err);
1da177e4
LT		 2173 goto out_put;
2174 }
dcb488a3
AA		 2175 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2176 if (nfserr)
2177 goto out_put;
1da177e4
LT		 2178
2179 }
2180 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 2181 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2182out_put:
2183 dput(dentry);
2184 exp_put(exp);
2185 return nfserr;
2186}
2187
2ebbc012 2188static __be32 *
b37ad28b 2189nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2190{
2ebbc012 2191 __be32 *attrlenp;
1da177e4
LT		 2192
2193 if (buflen < 6)
2194 return NULL;
2195 *p++ = htonl(2);
2196 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2197 *p++ = htonl(0); /* bmval1 */
2198
2199 attrlenp = p++;
2200 *p++ = nfserr; /* no htonl */
2201 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2202 return p;
2203}
2204
2205static int
a0ad13ef
N		 2206nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2207 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2208{
a0ad13ef 2209 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2210 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2211 int buflen;
2ebbc012 2212 __be32 *p = cd->buffer;
b37ad28b 2213 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2214
2215 /* In nfsv4, "." and ".." never make it onto the wire.. */
2216 if (name && isdotent(name, namlen)) {
2217 cd->common.err = nfs_ok;
2218 return 0;
2219 }
2220
2221 if (cd->offset)
2222 xdr_encode_hyper(cd->offset, (u64) offset);
2223
2224 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2225 if (buflen < 0)
2226 goto fail;
2227
2228 *p++ = xdr_one; /* mark entry present */
2229 cd->offset = p; /* remember pointer */
2230 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2231 p = xdr_encode_array(p, name, namlen); /* name length & name */
2232
2233 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2234 switch (nfserr) {
2235 case nfs_ok:
2236 p += buflen;
2237 break;
2238 case nfserr_resource:
2239 nfserr = nfserr_toosmall;
2240 goto fail;
2241 case nfserr_dropit:
2242 goto fail;
2243 default:
2244 /*
2245 * If the client requested the RDATTR_ERROR attribute,
2246 * we stuff the error code into this attribute
2247 * and continue. If this attribute was not requested,
2248 * then in accordance with the spec, we fail the
2249 * entire READDIR operation(!)
2250 */
2251 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2252 goto fail;
1da177e4 2253 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2254 if (p == NULL) {
2255 nfserr = nfserr_toosmall;
1da177e4 2256 goto fail;
34081efc 2257 }
1da177e4
LT		 2258 }
2259 cd->buflen -= (p - cd->buffer);
2260 cd->buffer = p;
2261 cd->common.err = nfs_ok;
2262 return 0;
2263fail:
2264 cd->common.err = nfserr;
2265 return -EINVAL;
2266}
2267
e2f282b9
BH		 2268static void
2269nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2270{
2271 ENCODE_HEAD;
2272
2273 RESERVE_SPACE(sizeof(stateid_t));
2274 WRITE32(sid->si_generation);
2275 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2276 ADJUST_ARGS();
2277}
2278
695e12f8 2279static __be32
b37ad28b 2280nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4
LT		 2281{
2282 ENCODE_HEAD;
2283
2284 if (!nfserr) {
2285 RESERVE_SPACE(8);
2286 WRITE32(access->ac_supported);
2287 WRITE32(access->ac_resp_access);
2288 ADJUST_ARGS();
2289 }
695e12f8 2290 return nfserr;
1da177e4
LT		 2291}
2292
695e12f8 2293static __be32
b37ad28b 2294nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4
LT		 2295{
2296 ENCODE_SEQID_OP_HEAD;
2297
e2f282b9
BH		 2298 if (!nfserr)
2299 nfsd4_encode_stateid(resp, &close->cl_stateid);
2300
1da177e4 2301 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
695e12f8 2302 return nfserr;
1da177e4
LT		 2303}
2304
2305
695e12f8 2306static __be32
b37ad28b 2307nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4
LT		 2308{
2309 ENCODE_HEAD;
2310
2311 if (!nfserr) {
2312 RESERVE_SPACE(8);
2313 WRITEMEM(commit->co_verf.data, 8);
2314 ADJUST_ARGS();
2315 }
695e12f8 2316 return nfserr;
1da177e4
LT		 2317}
2318
695e12f8 2319static __be32
b37ad28b 2320nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4
LT		 2321{
2322 ENCODE_HEAD;
2323
2324 if (!nfserr) {
2325 RESERVE_SPACE(32);
2326 WRITECINFO(create->cr_cinfo);
2327 WRITE32(2);
2328 WRITE32(create->cr_bmval[0]);
2329 WRITE32(create->cr_bmval[1]);
2330 ADJUST_ARGS();
2331 }
695e12f8 2332 return nfserr;
1da177e4
LT		 2333}
2334
b37ad28b
AV		 2335static __be32
2336nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2337{
2338 struct svc_fh *fhp = getattr->ga_fhp;
2339 int buflen;
2340
2341 if (nfserr)
2342 return nfserr;
2343
2344 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2345 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2346 resp->p, &buflen, getattr->ga_bmval,
406a7ea9 2347 resp->rqstp, 0);
1da177e4
LT		 2348 if (!nfserr)
2349 resp->p += buflen;
2350 return nfserr;
2351}
2352
695e12f8
BH		 2353static __be32
2354nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2355{
695e12f8 2356 struct svc_fh *fhp = *fhpp;
1da177e4
LT		 2357 unsigned int len;
2358 ENCODE_HEAD;
2359
2360 if (!nfserr) {
2361 len = fhp->fh_handle.fh_size;
2362 RESERVE_SPACE(len + 4);
2363 WRITE32(len);
2364 WRITEMEM(&fhp->fh_handle.fh_base, len);
2365 ADJUST_ARGS();
2366 }
695e12f8 2367 return nfserr;
1da177e4
LT		 2368}
2369
2370/*
2371* Including all fields other than the name, a LOCK4denied structure requires
2372* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2373*/
2374static void
2375nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2376{
2377 ENCODE_HEAD;
2378
2379 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2380 WRITE64(ld->ld_start);
2381 WRITE64(ld->ld_length);
2382 WRITE32(ld->ld_type);
2383 if (ld->ld_sop) {
2384 WRITEMEM(&ld->ld_clientid, 8);
2385 WRITE32(ld->ld_sop->so_owner.len);
2386 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2387 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2388 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2389 WRITE64((u64)0); /* clientid */
2390 WRITE32(0); /* length of owner name */
2391 }
2392 ADJUST_ARGS();
2393}
2394
695e12f8 2395static __be32
b37ad28b 2396nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2397{
1da177e4
LT		 2398 ENCODE_SEQID_OP_HEAD;
2399
e2f282b9
BH		 2400 if (!nfserr)
2401 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2402 else if (nfserr == nfserr_denied)
1da177e4
LT		 2403 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2404
3a65588a 2405 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
695e12f8 2406 return nfserr;
1da177e4
LT		 2407}
2408
695e12f8 2409static __be32
b37ad28b 2410nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2411{
2412 if (nfserr == nfserr_denied)
2413 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2414 return nfserr;
1da177e4
LT		 2415}
2416
695e12f8 2417static __be32
b37ad28b 2418nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4
LT		 2419{
2420 ENCODE_SEQID_OP_HEAD;
2421
e2f282b9
BH		 2422 if (!nfserr)
2423 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2424
1da177e4 2425 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
695e12f8 2426 return nfserr;
1da177e4
LT		 2427}
2428
2429
695e12f8 2430static __be32
b37ad28b 2431nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4
LT		 2432{
2433 ENCODE_HEAD;
2434
2435 if (!nfserr) {
2436 RESERVE_SPACE(20);
2437 WRITECINFO(link->li_cinfo);
2438 ADJUST_ARGS();
2439 }
695e12f8 2440 return nfserr;
1da177e4
LT		 2441}
2442
2443
695e12f8 2444static __be32
b37ad28b 2445nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2446{
1b6b2257 2447 ENCODE_HEAD;
1da177e4
LT		 2448 ENCODE_SEQID_OP_HEAD;
2449
2450 if (nfserr)
2451 goto out;
2452
e2f282b9
BH		 2453 nfsd4_encode_stateid(resp, &open->op_stateid);
2454 RESERVE_SPACE(40);
1da177e4
LT		 2455 WRITECINFO(open->op_cinfo);
2456 WRITE32(open->op_rflags);
2457 WRITE32(2);
2458 WRITE32(open->op_bmval[0]);
2459 WRITE32(open->op_bmval[1]);
2460 WRITE32(open->op_delegate_type);
2461 ADJUST_ARGS();
2462
2463 switch (open->op_delegate_type) {
2464 case NFS4_OPEN_DELEGATE_NONE:
2465 break;
2466 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2467 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2468 RESERVE_SPACE(20);
7b190fec 2469 WRITE32(open->op_recall);
1da177e4
LT		 2470
2471 /*
2472 * TODO: ACE's in delegations
2473 */
2474 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2475 WRITE32(0);
2476 WRITE32(0);
2477 WRITE32(0); /* XXX: is NULL principal ok? */
2478 ADJUST_ARGS();
2479 break;
2480 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2481 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2482 RESERVE_SPACE(32);
1da177e4
LT		 2483 WRITE32(0);
2484
2485 /*
2486 * TODO: space_limit's in delegations
2487 */
2488 WRITE32(NFS4_LIMIT_SIZE);
2489 WRITE32(~(u32)0);
2490 WRITE32(~(u32)0);
2491
2492 /*
2493 * TODO: ACE's in delegations
2494 */
2495 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2496 WRITE32(0);
2497 WRITE32(0);
2498 WRITE32(0); /* XXX: is NULL principal ok? */
2499 ADJUST_ARGS();
2500 break;
2501 default:
2502 BUG();
2503 }
2504 /* XXX save filehandle here */
2505out:
2506 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
695e12f8 2507 return nfserr;
1da177e4
LT		 2508}
2509
695e12f8 2510static __be32
b37ad28b 2511nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4
LT		 2512{
2513 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2514
2515 if (!nfserr)
2516 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4
LT		 2517
2518 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
695e12f8 2519 return nfserr;
1da177e4
LT		 2520}
2521
695e12f8 2522static __be32
b37ad28b 2523nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4
LT		 2524{
2525 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2526
2527 if (!nfserr)
2528 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4
LT		 2529
2530 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
695e12f8 2531 return nfserr;
1da177e4
LT		 2532}
2533
b37ad28b
AV		 2534static __be32
2535nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2536 struct nfsd4_read *read)
1da177e4
LT		 2537{
2538 u32 eof;
2539 int v, pn;
2540 unsigned long maxcount;
2541 long len;
2542 ENCODE_HEAD;
2543
2544 if (nfserr)
2545 return nfserr;
2546 if (resp->xbuf->page_len)
2547 return nfserr_resource;
2548
2549 RESERVE_SPACE(8); /* eof flag and byte count */
2550
7adae489 2551 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2552 if (maxcount > read->rd_length)
2553 maxcount = read->rd_length;
2554
2555 len = maxcount;
2556 v = 0;
2557 while (len > 0) {
44524359 2558 pn = resp->rqstp->rq_resused++;
3cc03b16 2559 resp->rqstp->rq_vec[v].iov_base =
44524359 2560 page_address(resp->rqstp->rq_respages[pn]);
3cc03b16 2561 resp->rqstp->rq_vec[v].iov_len =
44524359 2562 len < PAGE_SIZE ? len : PAGE_SIZE;
1da177e4
LT		 2563 v++;
2564 len -= PAGE_SIZE;
2565 }
2566 read->rd_vlen = v;
2567
2568 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2569 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2570 &maxcount);
2571
2572 if (nfserr == nfserr_symlink)
2573 nfserr = nfserr_inval;
2574 if (nfserr)
2575 return nfserr;
44524359
N		 2576 eof = (read->rd_offset + maxcount >=
2577 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2578
2579 WRITE32(eof);
2580 WRITE32(maxcount);
2581 ADJUST_ARGS();
6ed6decc
N		 2582 resp->xbuf->head[0].iov_len = (char*)p
2583 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2584 resp->xbuf->page_len = maxcount;
2585
6ed6decc 2586 /* Use rest of head for padding and remaining ops: */
6ed6decc 2587 resp->xbuf->tail[0].iov_base = p;
1da177e4 2588 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2589 if (maxcount&3) {
6ed6decc
N		 2590 RESERVE_SPACE(4);
2591 WRITE32(0);
1da177e4
LT		 2592 resp->xbuf->tail[0].iov_base += maxcount&3;
2593 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2594 ADJUST_ARGS();
1da177e4
LT		 2595 }
2596 return 0;
2597}
2598
b37ad28b
AV		 2599static __be32
2600nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 2601{
2602 int maxcount;
2603 char *page;
2604 ENCODE_HEAD;
2605
2606 if (nfserr)
2607 return nfserr;
2608 if (resp->xbuf->page_len)
2609 return nfserr_resource;
2610
44524359 2611 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2612
2613 maxcount = PAGE_SIZE;
2614 RESERVE_SPACE(4);
2615
2616 /*
2617 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2618 * if they would overflow the buffer. Is this kosher in NFSv4? If
2619 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2620 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2621 */
2622 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2623 if (nfserr == nfserr_isdir)
2624 return nfserr_inval;
2625 if (nfserr)
2626 return nfserr;
2627
2628 WRITE32(maxcount);
2629 ADJUST_ARGS();
6ed6decc
N		 2630 resp->xbuf->head[0].iov_len = (char*)p
2631 - (char*)resp->xbuf->head[0].iov_base;
2632 resp->xbuf->page_len = maxcount;
1da177e4 2633
6ed6decc 2634 /* Use rest of head for padding and remaining ops: */
6ed6decc 2635 resp->xbuf->tail[0].iov_base = p;
1da177e4 2636 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2637 if (maxcount&3) {
6ed6decc
N		 2638 RESERVE_SPACE(4);
2639 WRITE32(0);
1da177e4
LT		 2640 resp->xbuf->tail[0].iov_base += maxcount&3;
2641 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2642 ADJUST_ARGS();
1da177e4
LT		 2643 }
2644 return 0;
2645}
2646
b37ad28b
AV		 2647static __be32
2648nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 2649{
2650 int maxcount;
2651 loff_t offset;
2ebbc012 2652 __be32 *page, *savep, *tailbase;
1da177e4
LT		 2653 ENCODE_HEAD;
2654
2655 if (nfserr)
2656 return nfserr;
2657 if (resp->xbuf->page_len)
2658 return nfserr_resource;
2659
2660 RESERVE_SPACE(8); /* verifier */
2661 savep = p;
2662
2663 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2664 WRITE32(0);
2665 WRITE32(0);
2666 ADJUST_ARGS();
2667 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 2668 tailbase = p;
1da177e4
LT		 2669
2670 maxcount = PAGE_SIZE;
2671 if (maxcount > readdir->rd_maxcount)
2672 maxcount = readdir->rd_maxcount;
2673
2674 /*
2675 * Convert from bytes to words, account for the two words already
2676 * written, make sure to leave two words at the end for the next
2677 * pointer and eof field.
2678 */
2679 maxcount = (maxcount >> 2) - 4;
2680 if (maxcount < 0) {
2681 nfserr = nfserr_toosmall;
2682 goto err_no_verf;
2683 }
2684
44524359 2685 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2686 readdir->common.err = 0;
2687 readdir->buflen = maxcount;
2688 readdir->buffer = page;
2689 readdir->offset = NULL;
2690
2691 offset = readdir->rd_cookie;
2692 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2693 &offset,
2694 &readdir->common, nfsd4_encode_dirent);
2695 if (nfserr == nfs_ok &&
2696 readdir->common.err == nfserr_toosmall &&
2697 readdir->buffer == page)
2698 nfserr = nfserr_toosmall;
2699 if (nfserr == nfserr_symlink)
2700 nfserr = nfserr_notdir;
2701 if (nfserr)
2702 goto err_no_verf;
2703
2704 if (readdir->offset)
2705 xdr_encode_hyper(readdir->offset, offset);
2706
2707 p = readdir->buffer;
2708 *p++ = 0; /* no more entries */
2709 *p++ = htonl(readdir->common.err == nfserr_eof);
44524359
N		 2710 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2711 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
1da177e4 2712
bb6e8a9f 2713 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 2714 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 2715 resp->xbuf->tail[0].iov_len = 0;
2716 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 2717 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 2718
2719 return 0;
2720err_no_verf:
2721 p = savep;
2722 ADJUST_ARGS();
2723 return nfserr;
2724}
2725
695e12f8 2726static __be32
b37ad28b 2727nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4
LT		 2728{
2729 ENCODE_HEAD;
2730
2731 if (!nfserr) {
2732 RESERVE_SPACE(20);
2733 WRITECINFO(remove->rm_cinfo);
2734 ADJUST_ARGS();
2735 }
695e12f8 2736 return nfserr;
1da177e4
LT		 2737}
2738
695e12f8 2739static __be32
b37ad28b 2740nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4
LT		 2741{
2742 ENCODE_HEAD;
2743
2744 if (!nfserr) {
2745 RESERVE_SPACE(40);
2746 WRITECINFO(rename->rn_sinfo);
2747 WRITECINFO(rename->rn_tinfo);
2748 ADJUST_ARGS();
2749 }
695e12f8 2750 return nfserr;
1da177e4
LT		 2751}
2752
695e12f8 2753static __be32
ca5c8cde 2754nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
dcb488a3
AA		 2755 struct nfsd4_secinfo *secinfo)
2756{
2757 int i = 0;
2758 struct svc_export *exp = secinfo->si_exp;
4796f457
BF		 2759 u32 nflavs;
2760 struct exp_flavor_info *flavs;
2761 struct exp_flavor_info def_flavs[2];
dcb488a3
AA		 2762 ENCODE_HEAD;
2763
2764 if (nfserr)
2765 goto out;
4796f457
BF		 2766 if (exp->ex_nflavors) {
2767 flavs = exp->ex_flavors;
2768 nflavs = exp->ex_nflavors;
2769 } else { /* Handling of some defaults in absence of real secinfo: */
2770 flavs = def_flavs;
2771 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2772 nflavs = 2;
2773 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2774 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2775 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2776 nflavs = 1;
2777 flavs[0].pseudoflavor
2778 = svcauth_gss_flavor(exp->ex_client);
2779 } else {
2780 nflavs = 1;
2781 flavs[0].pseudoflavor
2782 = exp->ex_client->flavour->flavour;
2783 }
2784 }
2785
dcb488a3 2786 RESERVE_SPACE(4);
4796f457 2787 WRITE32(nflavs);
dcb488a3 2788 ADJUST_ARGS();
4796f457
BF		 2789 for (i = 0; i < nflavs; i++) {
2790 u32 flav = flavs[i].pseudoflavor;
dcb488a3
AA		 2791 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2792
2793 if (gm) {
2794 RESERVE_SPACE(4);
2795 WRITE32(RPC_AUTH_GSS);
2796 ADJUST_ARGS();
2797 RESERVE_SPACE(4 + gm->gm_oid.len);
2798 WRITE32(gm->gm_oid.len);
2799 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2800 ADJUST_ARGS();
2801 RESERVE_SPACE(4);
2802 WRITE32(0); /* qop */
2803 ADJUST_ARGS();
2804 RESERVE_SPACE(4);
2805 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2806 ADJUST_ARGS();
2807 gss_mech_put(gm);
2808 } else {
2809 RESERVE_SPACE(4);
2810 WRITE32(flav);
2811 ADJUST_ARGS();
2812 }
2813 }
2814out:
2815 if (exp)
2816 exp_put(exp);
695e12f8 2817 return nfserr;
dcb488a3
AA		 2818}
2819
1da177e4
LT		 2820/*
2821 * The SETATTR encode routine is special -- it always encodes a bitmap,
2822 * regardless of the error status.
2823 */
695e12f8 2824static __be32
b37ad28b 2825nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4
LT		 2826{
2827 ENCODE_HEAD;
2828
2829 RESERVE_SPACE(12);
2830 if (nfserr) {
2831 WRITE32(2);
2832 WRITE32(0);
2833 WRITE32(0);
2834 }
2835 else {
2836 WRITE32(2);
2837 WRITE32(setattr->sa_bmval[0]);
2838 WRITE32(setattr->sa_bmval[1]);
2839 }
2840 ADJUST_ARGS();
695e12f8 2841 return nfserr;
1da177e4
LT		 2842}
2843
695e12f8 2844static __be32
b37ad28b 2845nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4
LT		 2846{
2847 ENCODE_HEAD;
2848
2849 if (!nfserr) {
2850 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2851 WRITEMEM(&scd->se_clientid, 8);
2852 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2853 ADJUST_ARGS();
2854 }
2855 else if (nfserr == nfserr_clid_inuse) {
2856 RESERVE_SPACE(8);
2857 WRITE32(0);
2858 WRITE32(0);
2859 ADJUST_ARGS();
2860 }
695e12f8 2861 return nfserr;
1da177e4
LT		 2862}
2863
695e12f8 2864static __be32
b37ad28b 2865nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4
LT		 2866{
2867 ENCODE_HEAD;
2868
2869 if (!nfserr) {
2870 RESERVE_SPACE(16);
2871 WRITE32(write->wr_bytes_written);
2872 WRITE32(write->wr_how_written);
2873 WRITEMEM(write->wr_verifier.data, 8);
2874 ADJUST_ARGS();
2875 }
695e12f8 2876 return nfserr;
1da177e4
LT		 2877}
2878
2db134eb
AA		 2879static __be32
2880nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2881 struct nfsd4_exchange_id *exid)
2882{
0733d213
AA		 2883 ENCODE_HEAD;
2884 char *major_id;
2885 char *server_scope;
2886 int major_id_sz;
2887 int server_scope_sz;
2888 uint64_t minor_id = 0;
2889
2890 if (nfserr)
2891 return nfserr;
2892
2893 major_id = utsname()->nodename;
2894 major_id_sz = strlen(major_id);
2895 server_scope = utsname()->nodename;
2896 server_scope_sz = strlen(server_scope);
2897
2898 RESERVE_SPACE(
2899 8 /* eir_clientid */ +
2900 4 /* eir_sequenceid */ +
2901 4 /* eir_flags */ +
2902 4 /* spr_how (SP4_NONE) */ +
2903 8 /* so_minor_id */ +
2904 4 /* so_major_id.len */ +
2905 (XDR_QUADLEN(major_id_sz) * 4) +
2906 4 /* eir_server_scope.len */ +
2907 (XDR_QUADLEN(server_scope_sz) * 4) +
2908 4 /* eir_server_impl_id.count (0) */);
2909
2910 WRITEMEM(&exid->clientid, 8);
2911 WRITE32(exid->seqid);
2912 WRITE32(exid->flags);
2913
2914 /* state_protect4_r. Currently only support SP4_NONE */
2915 BUG_ON(exid->spa_how != SP4_NONE);
2916 WRITE32(exid->spa_how);
2917
2918 /* The server_owner struct */
2919 WRITE64(minor_id); /* Minor id */
2920 /* major id */
2921 WRITE32(major_id_sz);
2922 WRITEMEM(major_id, major_id_sz);
2923
2924 /* Server scope */
2925 WRITE32(server_scope_sz);
2926 WRITEMEM(server_scope, server_scope_sz);
2927
2928 /* Implementation id */
2929 WRITE32(0); /* zero length nfs_impl_id4 array */
2930 ADJUST_ARGS();
2931 return 0;
2db134eb
AA		 2932}
2933
2934static __be32
2935nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
2936 struct nfsd4_create_session *sess)
2937{
ec6b5d7b
AA		 2938 ENCODE_HEAD;
2939
2940 if (nfserr)
2941 return nfserr;
2942
2943 RESERVE_SPACE(24);
2944 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2945 WRITE32(sess->seqid);
2946 WRITE32(sess->flags);
2947 ADJUST_ARGS();
2948
2949 RESERVE_SPACE(28);
2950 WRITE32(0); /* headerpadsz */
2951 WRITE32(sess->fore_channel.maxreq_sz);
2952 WRITE32(sess->fore_channel.maxresp_sz);
2953 WRITE32(sess->fore_channel.maxresp_cached);
2954 WRITE32(sess->fore_channel.maxops);
2955 WRITE32(sess->fore_channel.maxreqs);
2956 WRITE32(sess->fore_channel.nr_rdma_attrs);
2957 ADJUST_ARGS();
2958
2959 if (sess->fore_channel.nr_rdma_attrs) {
2960 RESERVE_SPACE(4);
2961 WRITE32(sess->fore_channel.rdma_attrs);
2962 ADJUST_ARGS();
2963 }
2964
2965 RESERVE_SPACE(28);
2966 WRITE32(0); /* headerpadsz */
2967 WRITE32(sess->back_channel.maxreq_sz);
2968 WRITE32(sess->back_channel.maxresp_sz);
2969 WRITE32(sess->back_channel.maxresp_cached);
2970 WRITE32(sess->back_channel.maxops);
2971 WRITE32(sess->back_channel.maxreqs);
2972 WRITE32(sess->back_channel.nr_rdma_attrs);
2973 ADJUST_ARGS();
2974
2975 if (sess->back_channel.nr_rdma_attrs) {
2976 RESERVE_SPACE(4);
2977 WRITE32(sess->back_channel.rdma_attrs);
2978 ADJUST_ARGS();
2979 }
2980 return 0;
2db134eb
AA		 2981}
2982
2983static __be32
2984nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
2985 struct nfsd4_destroy_session *destroy_session)
2986{
2db134eb
AA		 2987 return nfserr;
2988}
2989
bf864a31 2990__be32
2db134eb
AA		 2991nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
2992 struct nfsd4_sequence *seq)
2993{
b85d4c01
BH		 2994 ENCODE_HEAD;
2995
2996 if (nfserr)
2997 return nfserr;
2998
2999 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3000 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3001 WRITE32(seq->seqid);
3002 WRITE32(seq->slotid);
3003 WRITE32(seq->maxslots);
3004 /*
3005 * FIXME: for now:
3006 * target_maxslots = maxslots
3007 * status_flags = 0
3008 */
3009 WRITE32(seq->maxslots);
3010 WRITE32(0);
3011
3012 ADJUST_ARGS();
3013 return 0;
2db134eb
AA		 3014}
3015
695e12f8
BH		 3016static __be32
3017nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3018{
3019 return nfserr;
3020}
3021
3022typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3023
2db134eb
AA		 3024/*
3025 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3026 * since we don't need to filter out obsolete ops as this is
3027 * done in the decoding phase.
3028 */
695e12f8 3029static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3030 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3031 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3032 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3033 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3034 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3035 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3036 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3037 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3038 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3039 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3040 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3041 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3042 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3043 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3044 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3045 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3046 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3047 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3048 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3049 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3050 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3051 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3052 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3053 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3054 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3055 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3056 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3057 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3058 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3059 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3060 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3061 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3062 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3063 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3064 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3065 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3066 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3067
3068 /* NFSv4.1 operations */
3069 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3070 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3071 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3072 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3073 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3074 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3075 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3076 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3077 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3078 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3079 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3080 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3081 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
3082 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3083 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3084 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3085 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3086 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3087 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3088};
3089
496c262c
AA		 3090/*
3091 * Calculate the total amount of memory that the compound response has taken
3092 * after encoding the current operation.
3093 *
3094 * pad: add on 8 bytes for the next operation's op_code and status so that
3095 * there is room to cache a failure on the next operation.
3096 *
3097 * Compare this length to the session se_fmaxresp_cached.
3098 *
3099 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3100 * will be at least a page and will therefore hold the xdr_buf head.
3101 */
3102static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3103{
3104 int status = 0;
3105 struct xdr_buf *xb = &resp->rqstp->rq_res;
3106 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3107 struct nfsd4_session *session = NULL;
3108 struct nfsd4_slot *slot = resp->cstate.slot;
3109 u32 length, tlen = 0, pad = 8;
3110
3111 if (!nfsd4_has_session(&resp->cstate))
3112 return status;
3113
3114 session = resp->cstate.session;
3115 if (session == NULL || slot->sl_cache_entry.ce_cachethis == 0)
3116 return status;
3117
3118 if (resp->opcnt >= args->opcnt)
3119 pad = 0; /* this is the last operation */
3120
3121 if (xb->page_len == 0) {
3122 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3123 } else {
3124 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3125 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3126
3127 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3128 }
3129 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3130 length, xb->page_len, tlen, pad);
3131
3132 if (length <= session->se_fmaxresp_cached)
3133 return status;
3134 else
3135 return nfserr_rep_too_big_to_cache;
3136}
3137
1da177e4
LT		 3138void
3139nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3140{
2ebbc012 3141 __be32 *statp;
1da177e4
LT		 3142 ENCODE_HEAD;
3143
3144 RESERVE_SPACE(8);
3145 WRITE32(op->opnum);
3146 statp = p++; /* to be backfilled at the end */
3147 ADJUST_ARGS();
3148
695e12f8
BH		 3149 if (op->opnum == OP_ILLEGAL)
3150 goto status;
3151 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3152 !nfsd4_enc_ops[op->opnum]);
3153 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
496c262c
AA		 3154 /* nfsd4_check_drc_limit guarantees enough room for error status */
3155 if (!op->status && nfsd4_check_drc_limit(resp))
3156 op->status = nfserr_rep_too_big_to_cache;
695e12f8 3157status:
1da177e4
LT		 3158 /*
3159 * Note: We write the status directly, instead of using WRITE32(),
3160 * since it is already in network byte order.
3161 */
3162 *statp = op->status;
3163}
3164
3165/*
3166 * Encode the reply stored in the stateowner reply cache
3167 *
3168 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3169 * previously sent already encoded operation.
3170 *
3171 * called with nfs4_lock_state() held
3172 */
3173void
3174nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3175{
3176 ENCODE_HEAD;
3177 struct nfs4_replay *rp = op->replay;
3178
3179 BUG_ON(!rp);
3180
3181 RESERVE_SPACE(8);
3182 WRITE32(op->opnum);
3183 *p++ = rp->rp_status; /* already xdr'ed */
3184 ADJUST_ARGS();
3185
3186 RESERVE_SPACE(rp->rp_buflen);
3187 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3188 ADJUST_ARGS();
3189}
3190
3191/*
3192 * END OF "GENERIC" ENCODE ROUTINES.
3193 */
3194
3195int
2ebbc012 3196nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3197{
3198 return xdr_ressize_check(rqstp, p);
3199}
3200
3201void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3202{
3203 if (args->ops != args->iops) {
3204 kfree(args->ops);
3205 args->ops = args->iops;
3206 }
f99d49ad
JJ		 3207 kfree(args->tmpp);
3208 args->tmpp = NULL;
1da177e4
LT		 3209 while (args->to_free) {
3210 struct tmpbuf *tb = args->to_free;
3211 args->to_free = tb->next;
3212 tb->release(tb->buf);
3213 kfree(tb);
3214 }
3215}
3216
3217int
2ebbc012 3218nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3219{
b37ad28b 3220 __be32 status;
1da177e4
LT		 3221
3222 args->p = p;
3223 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3224 args->pagelist = rqstp->rq_arg.pages;
3225 args->pagelen = rqstp->rq_arg.page_len;
3226 args->tmpp = NULL;
3227 args->to_free = NULL;
3228 args->ops = args->iops;
3229 args->rqstp = rqstp;
3230
3231 status = nfsd4_decode_compound(args);
3232 if (status) {
3233 nfsd4_release_compoundargs(args);
3234 }
3235 return !status;
3236}
3237
3238int
2ebbc012 3239nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3240{
3241 /*
3242 * All that remains is to write the tag and operation count...
3243 */
3244 struct kvec *iov;
3245 p = resp->tagp;
3246 *p++ = htonl(resp->taglen);
3247 memcpy(p, resp->tag, resp->taglen);
3248 p += XDR_QUADLEN(resp->taglen);
3249 *p++ = htonl(resp->opcnt);
3250
3251 if (rqstp->rq_res.page_len)
3252 iov = &rqstp->rq_res.tail[0];
3253 else
3254 iov = &rqstp->rq_res.head[0];
3255 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3256 BUG_ON(iov->iov_len > PAGE_SIZE);
6668958f 3257 if (nfsd4_has_session(&resp->cstate)) {
bf864a31
AA		 3258 if (resp->cstate.status == nfserr_replay_cache &&
3259 !nfsd4_not_cached(resp)) {
da3846a2
AA		 3260 iov->iov_len = resp->cstate.iovlen;
3261 } else {
3262 nfsd4_store_cache_entry(resp);
3263 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3264 resp->cstate.slot->sl_inuse = 0;
3265 }
3266 if (resp->cstate.session)
3267 nfsd4_put_session(resp->cstate.session);
3268 }
1da177e4
LT		 3269 return 1;
3270}
3271
3272/*
3273 * Local variables:
3274 * c-basic-offset: 8
3275 * End:
3276 */
Linux kernel - Deliverables
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