projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
nfsd: return nfserr_minor_vers_mismatch when compound minorversion != 0
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Server-side XDR for NFSv4
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * TODO: Neil Brown made the following observation: We currently
38 * initially reserve NFSD_BUFSIZE space on the transmit queue and
39 * never release any of that until the request is complete.
40 * It would be good to calculate a new maximum response size while
41 * decoding the COMPOUND, and call svc_reserve with this number
42 * at the end of nfs4svc_decode_compoundargs.
43 */
44
45#include <linux/param.h>
46#include <linux/smp.h>
1da177e4
LT		 47#include <linux/fs.h>
48#include <linux/namei.h>
49#include <linux/vfs.h>
50#include <linux/sunrpc/xdr.h>
51#include <linux/sunrpc/svc.h>
52#include <linux/sunrpc/clnt.h>
53#include <linux/nfsd/nfsd.h>
54#include <linux/nfsd/state.h>
55#include <linux/nfsd/xdr4.h>
56#include <linux/nfsd_idmap.h>
57#include <linux/nfs4.h>
58#include <linux/nfs4_acl.h>
dcb488a3 59#include <linux/sunrpc/gss_api.h>
4796f457 60#include <linux/sunrpc/svcauth_gss.h>
1da177e4
LT		 61
62#define NFSDDBG_FACILITY NFSDDBG_XDR
63
42ca0993
BF		 64/*
65 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
66 * directory in order to indicate to the client that a filesystem boundary is present
67 * We use a fixed fsid for a referral
68 */
69#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
70#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
71
b37ad28b
AV		 72static __be32
73check_filename(char *str, int len, __be32 err)
1da177e4
LT		 74{
75 int i;
76
77 if (len == 0)
78 return nfserr_inval;
79 if (isdotent(str, len))
80 return err;
81 for (i = 0; i < len; i++)
82 if (str[i] == '/')
83 return err;
84 return 0;
85}
86
87/*
88 * START OF "GENERIC" DECODE ROUTINES.
89 * These may look a little ugly since they are imported from a "generic"
90 * set of XDR encode/decode routines which are intended to be shared by
91 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
92 *
93 * If the pain of reading these is too great, it should be a straightforward
94 * task to translate them into Linux-specific versions which are more
95 * consistent with the style used in NFSv2/v3...
96 */
97#define DECODE_HEAD \
2ebbc012 98 __be32 *p; \
b37ad28b 99 __be32 status
1da177e4
LT		 100#define DECODE_TAIL \
101 status = 0; \
102out: \
103 return status; \
104xdr_error: \
817cb9d4
CL		 105 dprintk("NFSD: xdr error (%s:%d)\n", \
106 __FILE__, __LINE__); \
1da177e4
LT		 107 status = nfserr_bad_xdr; \
108 goto out
109
110#define READ32(x) (x) = ntohl(*p++)
111#define READ64(x) do { \
112 (x) = (u64)ntohl(*p++) << 32; \
113 (x) |= ntohl(*p++); \
114} while (0)
115#define READTIME(x) do { \
116 p++; \
117 (x) = ntohl(*p++); \
118 p++; \
119} while (0)
120#define READMEM(x,nbytes) do { \
121 x = (char *)p; \
122 p += XDR_QUADLEN(nbytes); \
123} while (0)
124#define SAVEMEM(x,nbytes) do { \
125 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
126 savemem(argp, p, nbytes) : \
127 (char *)p)) { \
817cb9d4
CL		 128 dprintk("NFSD: xdr error (%s:%d)\n", \
129 __FILE__, __LINE__); \
1da177e4
LT		 130 goto xdr_error; \
131 } \
132 p += XDR_QUADLEN(nbytes); \
133} while (0)
134#define COPYMEM(x,nbytes) do { \
135 memcpy((x), p, nbytes); \
136 p += XDR_QUADLEN(nbytes); \
137} while (0)
138
139/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
140#define READ_BUF(nbytes) do { \
141 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
142 p = argp->p; \
143 argp->p += XDR_QUADLEN(nbytes); \
144 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 145 dprintk("NFSD: xdr error (%s:%d)\n", \
146 __FILE__, __LINE__); \
1da177e4
LT		 147 goto xdr_error; \
148 } \
149} while (0)
150
ca2a05aa 151static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 152{
153 /* We want more bytes than seem to be available.
154 * Maybe we need a new page, maybe we have just run out
155 */
ca2a05aa 156 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 157 __be32 *p;
1da177e4
LT		 158 if (avail + argp->pagelen < nbytes)
159 return NULL;
160 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
161 return NULL;
162 /* ok, we can do it with the current plus the next page */
163 if (nbytes <= sizeof(argp->tmp))
164 p = argp->tmp;
165 else {
f99d49ad 166 kfree(argp->tmpp);
1da177e4
LT		 167 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
168 if (!p)
169 return NULL;
170
171 }
ca2a05aa
BF		 172 /*
173 * The following memcpy is safe because read_buf is always
174 * called with nbytes > avail, and the two cases above both
175 * guarantee p points to at least nbytes bytes.
176 */
1da177e4
LT		 177 memcpy(p, argp->p, avail);
178 /* step to next page */
179 argp->p = page_address(argp->pagelist[0]);
180 argp->pagelist++;
181 if (argp->pagelen < PAGE_SIZE) {
182 argp->end = p + (argp->pagelen>>2);
183 argp->pagelen = 0;
184 } else {
185 argp->end = p + (PAGE_SIZE>>2);
186 argp->pagelen -= PAGE_SIZE;
187 }
188 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
189 argp->p += XDR_QUADLEN(nbytes - avail);
190 return p;
191}
192
193static int
194defer_free(struct nfsd4_compoundargs *argp,
195 void (*release)(const void *), void *p)
196{
197 struct tmpbuf *tb;
198
199 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
200 if (!tb)
201 return -ENOMEM;
202 tb->buf = p;
203 tb->release = release;
204 tb->next = argp->to_free;
205 argp->to_free = tb;
206 return 0;
207}
208
2ebbc012 209static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 210{
1da177e4 211 if (p == argp->tmp) {
a4db5fe5
BF		 212 p = kmalloc(nbytes, GFP_KERNEL);
213 if (!p)
214 return NULL;
1da177e4
LT		 215 memcpy(p, argp->tmp, nbytes);
216 } else {
73dff8be 217 BUG_ON(p != argp->tmpp);
1da177e4
LT		 218 argp->tmpp = NULL;
219 }
220 if (defer_free(argp, kfree, p)) {
a4db5fe5 221 kfree(p);
1da177e4
LT		 222 return NULL;
223 } else
224 return (char *)p;
225}
226
b37ad28b 227static __be32
1da177e4
LT		 228nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
229{
230 u32 bmlen;
231 DECODE_HEAD;
232
233 bmval[0] = 0;
234 bmval[1] = 0;
235
236 READ_BUF(4);
237 READ32(bmlen);
238 if (bmlen > 1000)
239 goto xdr_error;
240
241 READ_BUF(bmlen << 2);
242 if (bmlen > 0)
243 READ32(bmval[0]);
244 if (bmlen > 1)
245 READ32(bmval[1]);
246
247 DECODE_TAIL;
248}
249
b37ad28b 250static __be32
1da177e4
LT		 251nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
252 struct nfs4_acl **acl)
253{
254 int expected_len, len = 0;
255 u32 dummy32;
256 char *buf;
b8dd7b9a 257 int host_err;
1da177e4
LT		 258
259 DECODE_HEAD;
260 iattr->ia_valid = 0;
261 if ((status = nfsd4_decode_bitmap(argp, bmval)))
262 return status;
263
264 /*
f34f9242 265 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP;
1da177e4
LT		 266 * read-only attributes return ERR_INVAL.
267 */
268 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
269 return nfserr_attrnotsupp;
270 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
271 return nfserr_inval;
272
273 READ_BUF(4);
274 READ32(expected_len);
275
276 if (bmval[0] & FATTR4_WORD0_SIZE) {
277 READ_BUF(8);
278 len += 8;
279 READ64(iattr->ia_size);
280 iattr->ia_valid |= ATTR_SIZE;
281 }
282 if (bmval[0] & FATTR4_WORD0_ACL) {
28e05dd8
BF		 283 int nace;
284 struct nfs4_ace *ace;
1da177e4
LT		 285
286 READ_BUF(4); len += 4;
287 READ32(nace);
288
28e05dd8
BF		 289 if (nace > NFS4_ACL_MAX)
290 return nfserr_resource;
291
292 *acl = nfs4_acl_new(nace);
1da177e4 293 if (*acl == NULL) {
b8dd7b9a 294 host_err = -ENOMEM;
1da177e4
LT		 295 goto out_nfserr;
296 }
28e05dd8 297 defer_free(argp, kfree, *acl);
1da177e4 298
28e05dd8
BF		 299 (*acl)->naces = nace;
300 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 301 READ_BUF(16); len += 16;
28e05dd8
BF		 302 READ32(ace->type);
303 READ32(ace->flag);
304 READ32(ace->access_mask);
1da177e4
LT		 305 READ32(dummy32);
306 READ_BUF(dummy32);
307 len += XDR_QUADLEN(dummy32) << 2;
308 READMEM(buf, dummy32);
28e05dd8 309 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
b8dd7b9a 310 host_err = 0;
28e05dd8
BF		 311 if (ace->whotype != NFS4_ACL_WHO_NAMED)
312 ace->who = 0;
313 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
b8dd7b9a 314 host_err = nfsd_map_name_to_gid(argp->rqstp,
28e05dd8 315 buf, dummy32, &ace->who);
1da177e4 316 else
b8dd7b9a 317 host_err = nfsd_map_name_to_uid(argp->rqstp,
28e05dd8 318 buf, dummy32, &ace->who);
b8dd7b9a 319 if (host_err)
1da177e4 320 goto out_nfserr;
1da177e4
LT		 321 }
322 } else
323 *acl = NULL;
324 if (bmval[1] & FATTR4_WORD1_MODE) {
325 READ_BUF(4);
326 len += 4;
327 READ32(iattr->ia_mode);
328 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
329 iattr->ia_valid |= ATTR_MODE;
330 }
331 if (bmval[1] & FATTR4_WORD1_OWNER) {
332 READ_BUF(4);
333 len += 4;
334 READ32(dummy32);
335 READ_BUF(dummy32);
336 len += (XDR_QUADLEN(dummy32) << 2);
337 READMEM(buf, dummy32);
b8dd7b9a 338 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
1da177e4
LT		 339 goto out_nfserr;
340 iattr->ia_valid |= ATTR_UID;
341 }
342 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
343 READ_BUF(4);
344 len += 4;
345 READ32(dummy32);
346 READ_BUF(dummy32);
347 len += (XDR_QUADLEN(dummy32) << 2);
348 READMEM(buf, dummy32);
b8dd7b9a 349 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
1da177e4
LT		 350 goto out_nfserr;
351 iattr->ia_valid |= ATTR_GID;
352 }
353 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
354 READ_BUF(4);
355 len += 4;
356 READ32(dummy32);
357 switch (dummy32) {
358 case NFS4_SET_TO_CLIENT_TIME:
359 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
360 all 32 bits of 'nseconds'. */
361 READ_BUF(12);
362 len += 12;
363 READ32(dummy32);
364 if (dummy32)
365 return nfserr_inval;
366 READ32(iattr->ia_atime.tv_sec);
367 READ32(iattr->ia_atime.tv_nsec);
368 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
369 return nfserr_inval;
370 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
371 break;
372 case NFS4_SET_TO_SERVER_TIME:
373 iattr->ia_valid |= ATTR_ATIME;
374 break;
375 default:
376 goto xdr_error;
377 }
378 }
1da177e4
LT		 379 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
380 READ_BUF(4);
381 len += 4;
382 READ32(dummy32);
383 switch (dummy32) {
384 case NFS4_SET_TO_CLIENT_TIME:
385 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
386 all 32 bits of 'nseconds'. */
387 READ_BUF(12);
388 len += 12;
389 READ32(dummy32);
390 if (dummy32)
391 return nfserr_inval;
392 READ32(iattr->ia_mtime.tv_sec);
393 READ32(iattr->ia_mtime.tv_nsec);
394 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
395 return nfserr_inval;
396 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
397 break;
398 case NFS4_SET_TO_SERVER_TIME:
399 iattr->ia_valid |= ATTR_MTIME;
400 break;
401 default:
402 goto xdr_error;
403 }
404 }
405 if (len != expected_len)
406 goto xdr_error;
407
408 DECODE_TAIL;
409
410out_nfserr:
b8dd7b9a 411 status = nfserrno(host_err);
1da177e4
LT		 412 goto out;
413}
414
b37ad28b 415static __be32
1da177e4
LT		 416nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
417{
418 DECODE_HEAD;
419
420 READ_BUF(4);
421 READ32(access->ac_req_access);
422
423 DECODE_TAIL;
424}
425
b37ad28b 426static __be32
1da177e4
LT		 427nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
428{
429 DECODE_HEAD;
430
431 close->cl_stateowner = NULL;
432 READ_BUF(4 + sizeof(stateid_t));
433 READ32(close->cl_seqid);
434 READ32(close->cl_stateid.si_generation);
435 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
436
437 DECODE_TAIL;
438}
439
440
b37ad28b 441static __be32
1da177e4
LT		 442nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
443{
444 DECODE_HEAD;
445
446 READ_BUF(12);
447 READ64(commit->co_offset);
448 READ32(commit->co_count);
449
450 DECODE_TAIL;
451}
452
b37ad28b 453static __be32
1da177e4
LT		 454nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
455{
456 DECODE_HEAD;
457
458 READ_BUF(4);
459 READ32(create->cr_type);
460 switch (create->cr_type) {
461 case NF4LNK:
462 READ_BUF(4);
463 READ32(create->cr_linklen);
464 READ_BUF(create->cr_linklen);
465 SAVEMEM(create->cr_linkname, create->cr_linklen);
466 break;
467 case NF4BLK:
468 case NF4CHR:
469 READ_BUF(8);
470 READ32(create->cr_specdata1);
471 READ32(create->cr_specdata2);
472 break;
473 case NF4SOCK:
474 case NF4FIFO:
475 case NF4DIR:
476 default:
477 break;
478 }
479
480 READ_BUF(4);
481 READ32(create->cr_namelen);
482 READ_BUF(create->cr_namelen);
483 SAVEMEM(create->cr_name, create->cr_namelen);
484 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
485 return status;
486
487 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
488 goto out;
489
490 DECODE_TAIL;
491}
492
b37ad28b 493static inline __be32
1da177e4
LT		 494nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
495{
496 DECODE_HEAD;
497
498 READ_BUF(sizeof(stateid_t));
499 READ32(dr->dr_stateid.si_generation);
500 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t));
501
502 DECODE_TAIL;
503}
504
b37ad28b 505static inline __be32
1da177e4
LT		 506nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
507{
508 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
509}
510
b37ad28b 511static __be32
1da177e4
LT		 512nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
513{
514 DECODE_HEAD;
515
516 READ_BUF(4);
517 READ32(link->li_namelen);
518 READ_BUF(link->li_namelen);
519 SAVEMEM(link->li_name, link->li_namelen);
520 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
521 return status;
522
523 DECODE_TAIL;
524}
525
b37ad28b 526static __be32
1da177e4
LT		 527nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
528{
529 DECODE_HEAD;
530
3a65588a 531 lock->lk_replay_owner = NULL;
1da177e4
LT		 532 /*
533 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
534 */
535 READ_BUF(28);
536 READ32(lock->lk_type);
537 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
538 goto xdr_error;
539 READ32(lock->lk_reclaim);
540 READ64(lock->lk_offset);
541 READ64(lock->lk_length);
542 READ32(lock->lk_is_new);
543
544 if (lock->lk_is_new) {
545 READ_BUF(36);
546 READ32(lock->lk_new_open_seqid);
547 READ32(lock->lk_new_open_stateid.si_generation);
548
549 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
550 READ32(lock->lk_new_lock_seqid);
551 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
552 READ32(lock->lk_new_owner.len);
553 READ_BUF(lock->lk_new_owner.len);
554 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
555 } else {
556 READ_BUF(20);
557 READ32(lock->lk_old_lock_stateid.si_generation);
558 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
559 READ32(lock->lk_old_lock_seqid);
560 }
561
562 DECODE_TAIL;
563}
564
b37ad28b 565static __be32
1da177e4
LT		 566nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
567{
568 DECODE_HEAD;
569
570 READ_BUF(32);
571 READ32(lockt->lt_type);
572 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
573 goto xdr_error;
574 READ64(lockt->lt_offset);
575 READ64(lockt->lt_length);
576 COPYMEM(&lockt->lt_clientid, 8);
577 READ32(lockt->lt_owner.len);
578 READ_BUF(lockt->lt_owner.len);
579 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
580
581 DECODE_TAIL;
582}
583
b37ad28b 584static __be32
1da177e4
LT		 585nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
586{
587 DECODE_HEAD;
588
589 locku->lu_stateowner = NULL;
590 READ_BUF(24 + sizeof(stateid_t));
591 READ32(locku->lu_type);
592 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
593 goto xdr_error;
594 READ32(locku->lu_seqid);
595 READ32(locku->lu_stateid.si_generation);
596 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
597 READ64(locku->lu_offset);
598 READ64(locku->lu_length);
599
600 DECODE_TAIL;
601}
602
b37ad28b 603static __be32
1da177e4
LT		 604nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
605{
606 DECODE_HEAD;
607
608 READ_BUF(4);
609 READ32(lookup->lo_len);
610 READ_BUF(lookup->lo_len);
611 SAVEMEM(lookup->lo_name, lookup->lo_len);
612 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
613 return status;
614
615 DECODE_TAIL;
616}
617
b37ad28b 618static __be32
1da177e4
LT		 619nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
620{
621 DECODE_HEAD;
622
623 memset(open->op_bmval, 0, sizeof(open->op_bmval));
624 open->op_iattr.ia_valid = 0;
625 open->op_stateowner = NULL;
626
627 /* seqid, share_access, share_deny, clientid, ownerlen */
628 READ_BUF(16 + sizeof(clientid_t));
629 READ32(open->op_seqid);
630 READ32(open->op_share_access);
631 READ32(open->op_share_deny);
632 COPYMEM(&open->op_clientid, sizeof(clientid_t));
633 READ32(open->op_owner.len);
634
635 /* owner, open_flag */
636 READ_BUF(open->op_owner.len + 4);
637 SAVEMEM(open->op_owner.data, open->op_owner.len);
638 READ32(open->op_create);
639 switch (open->op_create) {
640 case NFS4_OPEN_NOCREATE:
641 break;
642 case NFS4_OPEN_CREATE:
643 READ_BUF(4);
644 READ32(open->op_createmode);
645 switch (open->op_createmode) {
646 case NFS4_CREATE_UNCHECKED:
647 case NFS4_CREATE_GUARDED:
648 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
649 goto out;
650 break;
651 case NFS4_CREATE_EXCLUSIVE:
652 READ_BUF(8);
653 COPYMEM(open->op_verf.data, 8);
654 break;
655 default:
656 goto xdr_error;
657 }
658 break;
659 default:
660 goto xdr_error;
661 }
662
663 /* open_claim */
664 READ_BUF(4);
665 READ32(open->op_claim_type);
666 switch (open->op_claim_type) {
667 case NFS4_OPEN_CLAIM_NULL:
668 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
669 READ_BUF(4);
670 READ32(open->op_fname.len);
671 READ_BUF(open->op_fname.len);
672 SAVEMEM(open->op_fname.data, open->op_fname.len);
673 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
674 return status;
675 break;
676 case NFS4_OPEN_CLAIM_PREVIOUS:
677 READ_BUF(4);
678 READ32(open->op_delegate_type);
679 break;
680 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
681 READ_BUF(sizeof(stateid_t) + 4);
682 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t));
683 READ32(open->op_fname.len);
684 READ_BUF(open->op_fname.len);
685 SAVEMEM(open->op_fname.data, open->op_fname.len);
686 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
687 return status;
688 break;
689 default:
690 goto xdr_error;
691 }
692
693 DECODE_TAIL;
694}
695
b37ad28b 696static __be32
1da177e4
LT		 697nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
698{
699 DECODE_HEAD;
700
701 open_conf->oc_stateowner = NULL;
702 READ_BUF(4 + sizeof(stateid_t));
703 READ32(open_conf->oc_req_stateid.si_generation);
704 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
705 READ32(open_conf->oc_seqid);
706
707 DECODE_TAIL;
708}
709
b37ad28b 710static __be32
1da177e4
LT		 711nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
712{
713 DECODE_HEAD;
714
715 open_down->od_stateowner = NULL;
716 READ_BUF(12 + sizeof(stateid_t));
717 READ32(open_down->od_stateid.si_generation);
718 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
719 READ32(open_down->od_seqid);
720 READ32(open_down->od_share_access);
721 READ32(open_down->od_share_deny);
722
723 DECODE_TAIL;
724}
725
b37ad28b 726static __be32
1da177e4
LT		 727nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
728{
729 DECODE_HEAD;
730
731 READ_BUF(4);
732 READ32(putfh->pf_fhlen);
733 if (putfh->pf_fhlen > NFS4_FHSIZE)
734 goto xdr_error;
735 READ_BUF(putfh->pf_fhlen);
736 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
737
738 DECODE_TAIL;
739}
740
b37ad28b 741static __be32
1da177e4
LT		 742nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
743{
744 DECODE_HEAD;
745
746 READ_BUF(sizeof(stateid_t) + 12);
747 READ32(read->rd_stateid.si_generation);
748 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
749 READ64(read->rd_offset);
750 READ32(read->rd_length);
751
752 DECODE_TAIL;
753}
754
b37ad28b 755static __be32
1da177e4
LT		 756nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
757{
758 DECODE_HEAD;
759
760 READ_BUF(24);
761 READ64(readdir->rd_cookie);
762 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
763 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
764 READ32(readdir->rd_maxcount);
765 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
766 goto out;
767
768 DECODE_TAIL;
769}
770
b37ad28b 771static __be32
1da177e4
LT		 772nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
773{
774 DECODE_HEAD;
775
776 READ_BUF(4);
777 READ32(remove->rm_namelen);
778 READ_BUF(remove->rm_namelen);
779 SAVEMEM(remove->rm_name, remove->rm_namelen);
780 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
781 return status;
782
783 DECODE_TAIL;
784}
785
b37ad28b 786static __be32
1da177e4
LT		 787nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
788{
789 DECODE_HEAD;
790
791 READ_BUF(4);
792 READ32(rename->rn_snamelen);
793 READ_BUF(rename->rn_snamelen + 4);
794 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
795 READ32(rename->rn_tnamelen);
796 READ_BUF(rename->rn_tnamelen);
797 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
798 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
799 return status;
800 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
801 return status;
802
803 DECODE_TAIL;
804}
805
b37ad28b 806static __be32
1da177e4
LT		 807nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
808{
809 DECODE_HEAD;
810
811 READ_BUF(sizeof(clientid_t));
812 COPYMEM(clientid, sizeof(clientid_t));
813
814 DECODE_TAIL;
815}
816
dcb488a3
AA		 817static __be32
818nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
819 struct nfsd4_secinfo *secinfo)
820{
821 DECODE_HEAD;
822
823 READ_BUF(4);
824 READ32(secinfo->si_namelen);
825 READ_BUF(secinfo->si_namelen);
826 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
827 status = check_filename(secinfo->si_name, secinfo->si_namelen,
828 nfserr_noent);
829 if (status)
830 return status;
831 DECODE_TAIL;
832}
833
b37ad28b 834static __be32
1da177e4
LT		 835nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
836{
837 DECODE_HEAD;
838
839 READ_BUF(sizeof(stateid_t));
840 READ32(setattr->sa_stateid.si_generation);
841 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
842 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
843 goto out;
844
845 DECODE_TAIL;
846}
847
b37ad28b 848static __be32
1da177e4
LT		 849nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
850{
851 DECODE_HEAD;
852
853 READ_BUF(12);
854 COPYMEM(setclientid->se_verf.data, 8);
855 READ32(setclientid->se_namelen);
856
857 READ_BUF(setclientid->se_namelen + 8);
858 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
859 READ32(setclientid->se_callback_prog);
860 READ32(setclientid->se_callback_netid_len);
861
862 READ_BUF(setclientid->se_callback_netid_len + 4);
863 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
864 READ32(setclientid->se_callback_addr_len);
865
866 READ_BUF(setclientid->se_callback_addr_len + 4);
867 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
868 READ32(setclientid->se_callback_ident);
869
870 DECODE_TAIL;
871}
872
b37ad28b 873static __be32
1da177e4
LT		 874nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
875{
876 DECODE_HEAD;
877
878 READ_BUF(8 + sizeof(nfs4_verifier));
879 COPYMEM(&scd_c->sc_clientid, 8);
880 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
881
882 DECODE_TAIL;
883}
884
885/* Also used for NVERIFY */
b37ad28b 886static __be32
1da177e4
LT		 887nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
888{
889#if 0
890 struct nfsd4_compoundargs save = {
891 .p = argp->p,
892 .end = argp->end,
893 .rqstp = argp->rqstp,
894 };
895 u32 ve_bmval[2];
896 struct iattr ve_iattr; /* request */
897 struct nfs4_acl *ve_acl; /* request */
898#endif
899 DECODE_HEAD;
900
901 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
902 goto out;
903
904 /* For convenience's sake, we compare raw xdr'd attributes in
905 * nfsd4_proc_verify; however we still decode here just to return
906 * correct error in case of bad xdr. */
907#if 0
908 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
909 if (status == nfserr_inval) {
910 status = nfserrno(status);
911 goto out;
912 }
913#endif
914 READ_BUF(4);
915 READ32(verify->ve_attrlen);
916 READ_BUF(verify->ve_attrlen);
917 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
918
919 DECODE_TAIL;
920}
921
b37ad28b 922static __be32
1da177e4
LT		 923nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
924{
925 int avail;
926 int v;
927 int len;
928 DECODE_HEAD;
929
930 READ_BUF(sizeof(stateid_opaque_t) + 20);
931 READ32(write->wr_stateid.si_generation);
932 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
933 READ64(write->wr_offset);
934 READ32(write->wr_stable_how);
935 if (write->wr_stable_how > 2)
936 goto xdr_error;
937 READ32(write->wr_buflen);
938
939 /* Sorry .. no magic macros for this.. *
940 * READ_BUF(write->wr_buflen);
941 * SAVEMEM(write->wr_buf, write->wr_buflen);
942 */
943 avail = (char*)argp->end - (char*)argp->p;
944 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 945 dprintk("NFSD: xdr error (%s:%d)\n",
946 __FILE__, __LINE__);
1da177e4
LT		 947 goto xdr_error;
948 }
3cc03b16
N		 949 argp->rqstp->rq_vec[0].iov_base = p;
950 argp->rqstp->rq_vec[0].iov_len = avail;
1da177e4
LT		 951 v = 0;
952 len = write->wr_buflen;
3cc03b16
N		 953 while (len > argp->rqstp->rq_vec[v].iov_len) {
954 len -= argp->rqstp->rq_vec[v].iov_len;
1da177e4 955 v++;
3cc03b16 956 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1da177e4
LT		 957 argp->pagelist++;
958 if (argp->pagelen >= PAGE_SIZE) {
3cc03b16 959 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1da177e4
LT		 960 argp->pagelen -= PAGE_SIZE;
961 } else {
3cc03b16 962 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1da177e4
LT		 963 argp->pagelen -= len;
964 }
965 }
2ebbc012
AV		 966 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
967 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
3cc03b16 968 argp->rqstp->rq_vec[v].iov_len = len;
1da177e4
LT		 969 write->wr_vlen = v+1;
970
971 DECODE_TAIL;
972}
973
b37ad28b 974static __be32
1da177e4
LT		 975nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
976{
977 DECODE_HEAD;
978
979 READ_BUF(12);
980 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
981 READ32(rlockowner->rl_owner.len);
982 READ_BUF(rlockowner->rl_owner.len);
983 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
984
985 DECODE_TAIL;
986}
987
b37ad28b 988static __be32
1da177e4
LT		 989nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
990{
991 DECODE_HEAD;
992 struct nfsd4_op *op;
993 int i;
994
995 /*
996 * XXX: According to spec, we should check the tag
997 * for UTF-8 compliance. I'm postponing this for
998 * now because it seems that some clients do use
999 * binary tags.
1000 */
1001 READ_BUF(4);
1002 READ32(argp->taglen);
1003 READ_BUF(argp->taglen + 8);
1004 SAVEMEM(argp->tag, argp->taglen);
1005 READ32(argp->minorversion);
1006 READ32(argp->opcnt);
1007
1008 if (argp->taglen > NFSD4_MAX_TAGLEN)
1009 goto xdr_error;
1010 if (argp->opcnt > 100)
1011 goto xdr_error;
1012
e8c96f8c 1013 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1014 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1015 if (!argp->ops) {
1016 argp->ops = argp->iops;
817cb9d4 1017 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1018 goto xdr_error;
1019 }
1020 }
1021
30cff1ff
BH		 1022 if (argp->minorversion != 0)
1023 argp->opcnt = 0;
1024
1da177e4
LT		 1025 for (i = 0; i < argp->opcnt; i++) {
1026 op = &argp->ops[i];
1027 op->replay = NULL;
1028
1029 /*
1030 * We can't use READ_BUF() here because we need to handle
1031 * a missing opcode as an OP_WRITE + 1. So we need to check
1032 * to see if we're truly at the end of our buffer or if there
1033 * is another page we need to flip to.
1034 */
1035
1036 if (argp->p == argp->end) {
1037 if (argp->pagelen < 4) {
1038 /* There isn't an opcode still on the wire */
1039 op->opnum = OP_WRITE + 1;
1040 op->status = nfserr_bad_xdr;
1041 argp->opcnt = i+1;
1042 break;
1043 }
1044
1045 /*
1046 * False alarm. We just hit a page boundary, but there
1047 * is still data available. Move pointer across page
1048 * boundary. *snip from READ_BUF*
1049 */
1050 argp->p = page_address(argp->pagelist[0]);
1051 argp->pagelist++;
1052 if (argp->pagelen < PAGE_SIZE) {
1053 argp->end = p + (argp->pagelen>>2);
1054 argp->pagelen = 0;
1055 } else {
1056 argp->end = p + (PAGE_SIZE>>2);
1057 argp->pagelen -= PAGE_SIZE;
1058 }
1059 }
1060 op->opnum = ntohl(*argp->p++);
1061
1062 switch (op->opnum) {
1da177e4
LT		 1063 case OP_ACCESS:
1064 op->status = nfsd4_decode_access(argp, &op->u.access);
1065 break;
1066 case OP_CLOSE:
1067 op->status = nfsd4_decode_close(argp, &op->u.close);
1068 break;
1069 case OP_COMMIT:
1070 op->status = nfsd4_decode_commit(argp, &op->u.commit);
1071 break;
1072 case OP_CREATE:
1073 op->status = nfsd4_decode_create(argp, &op->u.create);
1074 break;
1075 case OP_DELEGRETURN:
1076 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn);
1077 break;
1078 case OP_GETATTR:
1079 op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1080 break;
1081 case OP_GETFH:
1082 op->status = nfs_ok;
1083 break;
1084 case OP_LINK:
1085 op->status = nfsd4_decode_link(argp, &op->u.link);
1086 break;
1087 case OP_LOCK:
1088 op->status = nfsd4_decode_lock(argp, &op->u.lock);
1089 break;
1090 case OP_LOCKT:
1091 op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1092 break;
1093 case OP_LOCKU:
1094 op->status = nfsd4_decode_locku(argp, &op->u.locku);
1095 break;
1096 case OP_LOOKUP:
1097 op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1098 break;
1099 case OP_LOOKUPP:
1100 op->status = nfs_ok;
1101 break;
1102 case OP_NVERIFY:
1103 op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1104 break;
1105 case OP_OPEN:
1106 op->status = nfsd4_decode_open(argp, &op->u.open);
1107 break;
1108 case OP_OPEN_CONFIRM:
1109 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1110 break;
1111 case OP_OPEN_DOWNGRADE:
1112 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1113 break;
1114 case OP_PUTFH:
1115 op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1116 break;
1117 case OP_PUTROOTFH:
1118 op->status = nfs_ok;
1119 break;
1120 case OP_READ:
1121 op->status = nfsd4_decode_read(argp, &op->u.read);
1122 break;
1123 case OP_READDIR:
1124 op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1125 break;
1126 case OP_READLINK:
1127 op->status = nfs_ok;
1128 break;
1129 case OP_REMOVE:
1130 op->status = nfsd4_decode_remove(argp, &op->u.remove);
1131 break;
1132 case OP_RENAME:
1133 op->status = nfsd4_decode_rename(argp, &op->u.rename);
1134 break;
1135 case OP_RESTOREFH:
1136 op->status = nfs_ok;
1137 break;
1138 case OP_RENEW:
1139 op->status = nfsd4_decode_renew(argp, &op->u.renew);
1140 break;
1141 case OP_SAVEFH:
1142 op->status = nfs_ok;
1143 break;
dcb488a3
AA		 1144 case OP_SECINFO:
1145 op->status = nfsd4_decode_secinfo(argp, &op->u.secinfo);
1146 break;
1da177e4
LT		 1147 case OP_SETATTR:
1148 op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1149 break;
1150 case OP_SETCLIENTID:
1151 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1152 break;
1153 case OP_SETCLIENTID_CONFIRM:
1154 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1155 break;
1156 case OP_VERIFY:
1157 op->status = nfsd4_decode_verify(argp, &op->u.verify);
1158 break;
1159 case OP_WRITE:
1160 op->status = nfsd4_decode_write(argp, &op->u.write);
1161 break;
1162 case OP_RELEASE_LOCKOWNER:
1163 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1164 break;
1165 default:
1166 op->opnum = OP_ILLEGAL;
1167 op->status = nfserr_op_illegal;
1168 break;
1169 }
1170
1171 if (op->status) {
1172 argp->opcnt = i+1;
1173 break;
1174 }
1175 }
1176
1177 DECODE_TAIL;
1178}
1179/*
1180 * END OF "GENERIC" DECODE ROUTINES.
1181 */
1182
1183/*
1184 * START OF "GENERIC" ENCODE ROUTINES.
1185 * These may look a little ugly since they are imported from a "generic"
1186 * set of XDR encode/decode routines which are intended to be shared by
1187 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1188 *
1189 * If the pain of reading these is too great, it should be a straightforward
1190 * task to translate them into Linux-specific versions which are more
1191 * consistent with the style used in NFSv2/v3...
1192 */
2ebbc012 1193#define ENCODE_HEAD __be32 *p
1da177e4
LT		 1194
1195#define WRITE32(n) *p++ = htonl(n)
1196#define WRITE64(n) do { \
1197 *p++ = htonl((u32)((n) >> 32)); \
1198 *p++ = htonl((u32)(n)); \
1199} while (0)
13b1867c 1200#define WRITEMEM(ptr,nbytes) do if (nbytes > 0) { \
1da177e4
LT		 1201 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1202 memcpy(p, ptr, nbytes); \
1203 p += XDR_QUADLEN(nbytes); \
1204} while (0)
1205#define WRITECINFO(c) do { \
1206 *p++ = htonl(c.atomic); \
1207 *p++ = htonl(c.before_ctime_sec); \
1208 *p++ = htonl(c.before_ctime_nsec); \
1209 *p++ = htonl(c.after_ctime_sec); \
1210 *p++ = htonl(c.after_ctime_nsec); \
1211} while (0)
1212
1213#define RESERVE_SPACE(nbytes) do { \
1214 p = resp->p; \
1215 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1216} while (0)
1217#define ADJUST_ARGS() resp->p = p
1218
1219/*
1220 * Header routine to setup seqid operation replay cache
1221 */
1222#define ENCODE_SEQID_OP_HEAD \
2ebbc012
AV		 1223 __be32 *p; \
1224 __be32 *save; \
1da177e4
LT		 1225 \
1226 save = resp->p;
1227
1228/*
7fb64cee
N		 1229 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1230 * is where sequence id's are incremented, and the replay cache is filled.
1231 * Note that we increment sequence id's here, at the last moment, so we're sure
1232 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1233 */
1234
1235#define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1236 if (seqid_mutating_err(nfserr) && stateowner) { \
bd9aac52 1237 stateowner->so_seqid++; \
1da177e4
LT		 1238 stateowner->so_replay.rp_status = nfserr; \
1239 stateowner->so_replay.rp_buflen = \
1240 (((char *)(resp)->p - (char *)save)); \
1241 memcpy(stateowner->so_replay.rp_buf, save, \
1242 stateowner->so_replay.rp_buflen); \
1243 } } while (0);
1244
81c3f413
BF		 1245/* Encode as an array of strings the string given with components
1246 * seperated @sep.
1247 */
b37ad28b 1248static __be32 nfsd4_encode_components(char sep, char *components,
2ebbc012 1249 __be32 **pp, int *buflen)
81c3f413 1250{
2ebbc012
AV		 1251 __be32 *p = *pp;
1252 __be32 *countp = p;
81c3f413
BF		 1253 int strlen, count=0;
1254 char *str, *end;
1255
1256 dprintk("nfsd4_encode_components(%s)\n", components);
1257 if ((*buflen -= 4) < 0)
1258 return nfserr_resource;
1259 WRITE32(0); /* We will fill this in with @count later */
1260 end = str = components;
1261 while (*end) {
1262 for (; *end && (*end != sep); end++)
1263 ; /* Point to end of component */
1264 strlen = end - str;
1265 if (strlen) {
1266 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1267 return nfserr_resource;
1268 WRITE32(strlen);
1269 WRITEMEM(str, strlen);
1270 count++;
1271 }
1272 else
1273 end++;
1274 str = end;
1275 }
1276 *pp = p;
1277 p = countp;
1278 WRITE32(count);
1279 return 0;
1280}
1281
1282/*
1283 * encode a location element of a fs_locations structure
1284 */
b37ad28b 1285static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1286 __be32 **pp, int *buflen)
81c3f413 1287{
b37ad28b 1288 __be32 status;
2ebbc012 1289 __be32 *p = *pp;
81c3f413
BF		 1290
1291 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1292 if (status)
1293 return status;
1294 status = nfsd4_encode_components('/', location->path, &p, buflen);
1295 if (status)
1296 return status;
1297 *pp = p;
1298 return 0;
1299}
1300
1301/*
1302 * Return the path to an export point in the pseudo filesystem namespace
1303 * Returned string is safe to use as long as the caller holds a reference
1304 * to @exp.
1305 */
b37ad28b 1306static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
81c3f413
BF		 1307{
1308 struct svc_fh tmp_fh;
1309 char *path, *rootpath;
81c3f413
BF		 1310
1311 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb 1312 *stat = exp_pseudoroot(rqstp, &tmp_fh);
cc45f017
AV		 1313 if (*stat)
1314 return NULL;
54775491 1315 rootpath = tmp_fh.fh_export->ex_pathname;
81c3f413 1316
54775491 1317 path = exp->ex_pathname;
81c3f413
BF		 1318
1319 if (strncmp(path, rootpath, strlen(rootpath))) {
817cb9d4 1320 dprintk("nfsd: fs_locations failed;"
81c3f413 1321 "%s is not contained in %s\n", path, rootpath);
cc45f017
AV		 1322 *stat = nfserr_notsupp;
1323 return NULL;
81c3f413
BF		 1324 }
1325
1326 return path + strlen(rootpath);
1327}
1328
1329/*
1330 * encode a fs_locations structure
1331 */
b37ad28b 1332static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1333 struct svc_export *exp,
2ebbc012 1334 __be32 **pp, int *buflen)
81c3f413 1335{
b37ad28b 1336 __be32 status;
cc45f017 1337 int i;
2ebbc012 1338 __be32 *p = *pp;
81c3f413 1339 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
cc45f017 1340 char *root = nfsd4_path(rqstp, exp, &status);
81c3f413 1341
cc45f017
AV		 1342 if (status)
1343 return status;
81c3f413
BF		 1344 status = nfsd4_encode_components('/', root, &p, buflen);
1345 if (status)
1346 return status;
1347 if ((*buflen -= 4) < 0)
1348 return nfserr_resource;
1349 WRITE32(fslocs->locations_count);
1350 for (i=0; i<fslocs->locations_count; i++) {
1351 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1352 &p, buflen);
1353 if (status)
1354 return status;
1355 }
1356 *pp = p;
1357 return 0;
1358}
1da177e4
LT		 1359
1360static u32 nfs4_ftypes[16] = {
1361 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1362 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1363 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1364 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1365};
1366
b37ad28b 1367static __be32
1da177e4 1368nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1369 __be32 **p, int *buflen)
1da177e4
LT		 1370{
1371 int status;
1372
1373 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1374 return nfserr_resource;
1375 if (whotype != NFS4_ACL_WHO_NAMED)
1376 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1377 else if (group)
1378 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1379 else
1380 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1381 if (status < 0)
1382 return nfserrno(status);
1383 *p = xdr_encode_opaque(*p, NULL, status);
1384 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1385 BUG_ON(*buflen < 0);
1386 return 0;
1387}
1388
b37ad28b 1389static inline __be32
2ebbc012 1390nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1da177e4
LT		 1391{
1392 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1393}
1394
b37ad28b 1395static inline __be32
2ebbc012 1396nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1da177e4
LT		 1397{
1398 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1399}
1400
b37ad28b 1401static inline __be32
1da177e4 1402nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1403 __be32 **p, int *buflen)
1da177e4
LT		 1404{
1405 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1406}
1407
42ca0993
BF		 1408#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1409 FATTR4_WORD0_RDATTR_ERROR)
1410#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1411
b37ad28b 1412static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1413{
1414 /* As per referral draft: */
1415 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1416 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1417 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1418 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1419 *rdattr_err = NFSERR_MOVED;
1420 else
1421 return nfserr_moved;
1422 }
1423 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1424 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1425 return 0;
1426}
1da177e4
LT		 1427
1428/*
1429 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1430 * ourselves.
1431 *
1432 * @countp is the buffer size in _words_; upon successful return this becomes
1433 * replaced with the number of words written.
1434 */
b37ad28b 1435__be32
1da177e4 1436nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2ebbc012 1437 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
406a7ea9 1438 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 1439{
1440 u32 bmval0 = bmval[0];
1441 u32 bmval1 = bmval[1];
1442 struct kstat stat;
1443 struct svc_fh tempfh;
1444 struct kstatfs statfs;
1445 int buflen = *countp << 2;
2ebbc012 1446 __be32 *attrlenp;
1da177e4
LT		 1447 u32 dummy;
1448 u64 dummy64;
42ca0993 1449 u32 rdattr_err = 0;
2ebbc012 1450 __be32 *p = buffer;
b37ad28b 1451 __be32 status;
b8dd7b9a 1452 int err;
1da177e4
LT		 1453 int aclsupport = 0;
1454 struct nfs4_acl *acl = NULL;
1455
1456 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1457 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1458 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1459
42ca0993
BF		 1460 if (exp->ex_fslocs.migrated) {
1461 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1462 if (status)
1463 goto out;
1464 }
1465
54775491 1466 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
b8dd7b9a 1467 if (err)
1da177e4 1468 goto out_nfserr;
a16e92ed
BF		 1469 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1470 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 1471 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1472 FATTR4_WORD1_SPACE_TOTAL))) {
b8dd7b9a
AV		 1473 err = vfs_statfs(dentry, &statfs);
1474 if (err)
1da177e4
LT		 1475 goto out_nfserr;
1476 }
1477 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1478 fh_init(&tempfh, NFS4_FHSIZE);
1479 status = fh_compose(&tempfh, exp, dentry, NULL);
1480 if (status)
1481 goto out;
1482 fhp = &tempfh;
1483 }
1484 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1485 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 1486 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1487 aclsupport = (err == 0);
1da177e4 1488 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 1489 if (err == -EOPNOTSUPP)
1da177e4 1490 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 1491 else if (err == -EINVAL) {
1da177e4
LT		 1492 status = nfserr_attrnotsupp;
1493 goto out;
b8dd7b9a 1494 } else if (err != 0)
1da177e4
LT		 1495 goto out_nfserr;
1496 }
1497 }
81c3f413
BF		 1498 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1499 if (exp->ex_fslocs.locations == NULL) {
1500 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1501 }
1502 }
1da177e4
LT		 1503 if ((buflen -= 16) < 0)
1504 goto out_resource;
1505
1506 WRITE32(2);
1507 WRITE32(bmval0);
1508 WRITE32(bmval1);
1509 attrlenp = p++; /* to be backfilled later */
1510
1511 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
42ca0993 1512 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1da177e4
LT		 1513 if ((buflen -= 12) < 0)
1514 goto out_resource;
42ca0993
BF		 1515 if (!aclsupport)
1516 word0 &= ~FATTR4_WORD0_ACL;
1517 if (!exp->ex_fslocs.locations)
1518 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1da177e4 1519 WRITE32(2);
42ca0993 1520 WRITE32(word0);
1da177e4
LT		 1521 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1522 }
1523 if (bmval0 & FATTR4_WORD0_TYPE) {
1524 if ((buflen -= 4) < 0)
1525 goto out_resource;
1526 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1527 if (dummy == NF4BAD)
1528 goto out_serverfault;
1529 WRITE32(dummy);
1530 }
1531 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1532 if ((buflen -= 4) < 0)
1533 goto out_resource;
49640001 1534 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 1535 WRITE32(NFS4_FH_PERSISTENT);
49640001 1536 else
e34ac862 1537 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 1538 }
1539 if (bmval0 & FATTR4_WORD0_CHANGE) {
1540 /*
1541 * Note: This _must_ be consistent with the scheme for writing
1542 * change_info, so any changes made here must be reflected there
1543 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1544 * macro above.)
1545 */
1546 if ((buflen -= 8) < 0)
1547 goto out_resource;
1548 WRITE32(stat.ctime.tv_sec);
1549 WRITE32(stat.ctime.tv_nsec);
1550 }
1551 if (bmval0 & FATTR4_WORD0_SIZE) {
1552 if ((buflen -= 8) < 0)
1553 goto out_resource;
1554 WRITE64(stat.size);
1555 }
1556 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1557 if ((buflen -= 4) < 0)
1558 goto out_resource;
1559 WRITE32(1);
1560 }
1561 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1562 if ((buflen -= 4) < 0)
1563 goto out_resource;
1564 WRITE32(1);
1565 }
1566 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1567 if ((buflen -= 4) < 0)
1568 goto out_resource;
1569 WRITE32(0);
1570 }
1571 if (bmval0 & FATTR4_WORD0_FSID) {
1572 if ((buflen -= 16) < 0)
1573 goto out_resource;
42ca0993
BF		 1574 if (exp->ex_fslocs.migrated) {
1575 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1576 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 1577 } else switch(fsid_source(fhp)) {
1578 case FSIDSOURCE_FSID:
1da177e4
LT		 1579 WRITE64((u64)exp->ex_fsid);
1580 WRITE64((u64)0);
af6a4e28
N		 1581 break;
1582 case FSIDSOURCE_DEV:
1da177e4
LT		 1583 WRITE32(0);
1584 WRITE32(MAJOR(stat.dev));
1585 WRITE32(0);
1586 WRITE32(MINOR(stat.dev));
af6a4e28
N		 1587 break;
1588 case FSIDSOURCE_UUID:
1589 WRITEMEM(exp->ex_uuid, 16);
1590 break;
1da177e4
LT		 1591 }
1592 }
1593 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1594 if ((buflen -= 4) < 0)
1595 goto out_resource;
1596 WRITE32(0);
1597 }
1598 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1599 if ((buflen -= 4) < 0)
1600 goto out_resource;
1601 WRITE32(NFSD_LEASE_TIME);
1602 }
1603 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1604 if ((buflen -= 4) < 0)
1605 goto out_resource;
42ca0993 1606 WRITE32(rdattr_err);
1da177e4
LT		 1607 }
1608 if (bmval0 & FATTR4_WORD0_ACL) {
1609 struct nfs4_ace *ace;
1da177e4
LT		 1610
1611 if (acl == NULL) {
1612 if ((buflen -= 4) < 0)
1613 goto out_resource;
1614
1615 WRITE32(0);
1616 goto out_acl;
1617 }
1618 if ((buflen -= 4) < 0)
1619 goto out_resource;
1620 WRITE32(acl->naces);
1621
28e05dd8 1622 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 1623 if ((buflen -= 4*3) < 0)
1624 goto out_resource;
1625 WRITE32(ace->type);
1626 WRITE32(ace->flag);
1627 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1628 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1629 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1630 &p, &buflen);
1631 if (status == nfserr_resource)
1632 goto out_resource;
1633 if (status)
1634 goto out;
1635 }
1636 }
1637out_acl:
1638 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1639 if ((buflen -= 4) < 0)
1640 goto out_resource;
1641 WRITE32(aclsupport ?
1642 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1643 }
1644 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1645 if ((buflen -= 4) < 0)
1646 goto out_resource;
1647 WRITE32(1);
1648 }
1649 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1650 if ((buflen -= 4) < 0)
1651 goto out_resource;
1652 WRITE32(1);
1653 }
1654 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1655 if ((buflen -= 4) < 0)
1656 goto out_resource;
1657 WRITE32(1);
1658 }
1659 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1660 if ((buflen -= 4) < 0)
1661 goto out_resource;
1662 WRITE32(1);
1663 }
1664 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1665 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1666 if (buflen < 0)
1667 goto out_resource;
1668 WRITE32(fhp->fh_handle.fh_size);
1669 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1670 }
1671 if (bmval0 & FATTR4_WORD0_FILEID) {
1672 if ((buflen -= 8) < 0)
1673 goto out_resource;
40ee5dc6 1674 WRITE64(stat.ino);
1da177e4
LT		 1675 }
1676 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1677 if ((buflen -= 8) < 0)
1678 goto out_resource;
1679 WRITE64((u64) statfs.f_ffree);
1680 }
1681 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1682 if ((buflen -= 8) < 0)
1683 goto out_resource;
1684 WRITE64((u64) statfs.f_ffree);
1685 }
1686 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1687 if ((buflen -= 8) < 0)
1688 goto out_resource;
1689 WRITE64((u64) statfs.f_files);
1690 }
81c3f413
BF		 1691 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1692 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1693 if (status == nfserr_resource)
1694 goto out_resource;
1695 if (status)
1696 goto out;
1697 }
1da177e4
LT		 1698 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1699 if ((buflen -= 4) < 0)
1700 goto out_resource;
1701 WRITE32(1);
1702 }
1703 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1704 if ((buflen -= 8) < 0)
1705 goto out_resource;
1706 WRITE64(~(u64)0);
1707 }
1708 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1709 if ((buflen -= 4) < 0)
1710 goto out_resource;
1711 WRITE32(255);
1712 }
1713 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1714 if ((buflen -= 4) < 0)
1715 goto out_resource;
a16e92ed 1716 WRITE32(statfs.f_namelen);
1da177e4
LT		 1717 }
1718 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1719 if ((buflen -= 8) < 0)
1720 goto out_resource;
7adae489 1721 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 1722 }
1723 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1724 if ((buflen -= 8) < 0)
1725 goto out_resource;
7adae489 1726 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 1727 }
1728 if (bmval1 & FATTR4_WORD1_MODE) {
1729 if ((buflen -= 4) < 0)
1730 goto out_resource;
1731 WRITE32(stat.mode & S_IALLUGO);
1732 }
1733 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1734 if ((buflen -= 4) < 0)
1735 goto out_resource;
1736 WRITE32(1);
1737 }
1738 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1739 if ((buflen -= 4) < 0)
1740 goto out_resource;
1741 WRITE32(stat.nlink);
1742 }
1743 if (bmval1 & FATTR4_WORD1_OWNER) {
1744 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1745 if (status == nfserr_resource)
1746 goto out_resource;
1747 if (status)
1748 goto out;
1749 }
1750 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1751 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1752 if (status == nfserr_resource)
1753 goto out_resource;
1754 if (status)
1755 goto out;
1756 }
1757 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1758 if ((buflen -= 8) < 0)
1759 goto out_resource;
1760 WRITE32((u32) MAJOR(stat.rdev));
1761 WRITE32((u32) MINOR(stat.rdev));
1762 }
1763 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1764 if ((buflen -= 8) < 0)
1765 goto out_resource;
1766 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1767 WRITE64(dummy64);
1768 }
1769 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1770 if ((buflen -= 8) < 0)
1771 goto out_resource;
1772 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1773 WRITE64(dummy64);
1774 }
1775 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1776 if ((buflen -= 8) < 0)
1777 goto out_resource;
1778 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1779 WRITE64(dummy64);
1780 }
1781 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1782 if ((buflen -= 8) < 0)
1783 goto out_resource;
1784 dummy64 = (u64)stat.blocks << 9;
1785 WRITE64(dummy64);
1786 }
1787 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1788 if ((buflen -= 12) < 0)
1789 goto out_resource;
1790 WRITE32(0);
1791 WRITE32(stat.atime.tv_sec);
1792 WRITE32(stat.atime.tv_nsec);
1793 }
1794 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1795 if ((buflen -= 12) < 0)
1796 goto out_resource;
1797 WRITE32(0);
1798 WRITE32(1);
1799 WRITE32(0);
1800 }
1801 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1802 if ((buflen -= 12) < 0)
1803 goto out_resource;
1804 WRITE32(0);
1805 WRITE32(stat.ctime.tv_sec);
1806 WRITE32(stat.ctime.tv_nsec);
1807 }
1808 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1809 if ((buflen -= 12) < 0)
1810 goto out_resource;
1811 WRITE32(0);
1812 WRITE32(stat.mtime.tv_sec);
1813 WRITE32(stat.mtime.tv_nsec);
1814 }
1815 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 1816 if ((buflen -= 8) < 0)
1817 goto out_resource;
406a7ea9
FF		 1818 /*
1819 * Get parent's attributes if not ignoring crossmount
1820 * and this is the root of a cross-mounted filesystem.
1821 */
1822 if (ignore_crossmnt == 0 &&
54775491
JB		 1823 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
1824 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
1825 exp->ex_path.mnt->mnt_mountpoint, &stat);
40ee5dc6
PS		 1826 if (err)
1827 goto out_nfserr;
1828 }
1829 WRITE64(stat.ino);
1da177e4
LT		 1830 }
1831 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1832 *countp = p - buffer;
1833 status = nfs_ok;
1834
1835out:
28e05dd8 1836 kfree(acl);
1da177e4
LT		 1837 if (fhp == &tempfh)
1838 fh_put(&tempfh);
1839 return status;
1840out_nfserr:
b8dd7b9a 1841 status = nfserrno(err);
1da177e4
LT		 1842 goto out;
1843out_resource:
1844 *countp = 0;
1845 status = nfserr_resource;
1846 goto out;
1847out_serverfault:
1848 status = nfserr_serverfault;
1849 goto out;
1850}
1851
c0ce6ec8
BF		 1852static inline int attributes_need_mount(u32 *bmval)
1853{
1854 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
1855 return 1;
1856 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
1857 return 1;
1858 return 0;
1859}
1860
b37ad28b 1861static __be32
1da177e4 1862nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2ebbc012 1863 const char *name, int namlen, __be32 *p, int *buflen)
1da177e4
LT		 1864{
1865 struct svc_export *exp = cd->rd_fhp->fh_export;
1866 struct dentry *dentry;
b37ad28b 1867 __be32 nfserr;
406a7ea9 1868 int ignore_crossmnt = 0;
1da177e4
LT		 1869
1870 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1871 if (IS_ERR(dentry))
1872 return nfserrno(PTR_ERR(dentry));
1873
1874 exp_get(exp);
406a7ea9
FF		 1875 /*
1876 * In the case of a mountpoint, the client may be asking for
1877 * attributes that are only properties of the underlying filesystem
1878 * as opposed to the cross-mounted file system. In such a case,
1879 * we will not follow the cross mount and will fill the attribtutes
1880 * directly from the mountpoint dentry.
1881 */
c0ce6ec8 1882 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
406a7ea9
FF		 1883 ignore_crossmnt = 1;
1884 else if (d_mountpoint(dentry)) {
021d3a72
BF		 1885 int err;
1886
dcb488a3
AA		 1887 /*
1888 * Why the heck aren't we just using nfsd_lookup??
1889 * Different "."/".." handling? Something else?
1890 * At least, add a comment here to explain....
1891 */
021d3a72
BF		 1892 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
1893 if (err) {
1894 nfserr = nfserrno(err);
1da177e4
LT		 1895 goto out_put;
1896 }
dcb488a3
AA		 1897 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
1898 if (nfserr)
1899 goto out_put;
1da177e4
LT		 1900
1901 }
1902 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 1903 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 1904out_put:
1905 dput(dentry);
1906 exp_put(exp);
1907 return nfserr;
1908}
1909
2ebbc012 1910static __be32 *
b37ad28b 1911nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 1912{
2ebbc012 1913 __be32 *attrlenp;
1da177e4
LT		 1914
1915 if (buflen < 6)
1916 return NULL;
1917 *p++ = htonl(2);
1918 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
1919 *p++ = htonl(0); /* bmval1 */
1920
1921 attrlenp = p++;
1922 *p++ = nfserr; /* no htonl */
1923 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1924 return p;
1925}
1926
1927static int
a0ad13ef
N		 1928nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
1929 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 1930{
a0ad13ef 1931 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 1932 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1933 int buflen;
2ebbc012 1934 __be32 *p = cd->buffer;
b37ad28b 1935 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 1936
1937 /* In nfsv4, "." and ".." never make it onto the wire.. */
1938 if (name && isdotent(name, namlen)) {
1939 cd->common.err = nfs_ok;
1940 return 0;
1941 }
1942
1943 if (cd->offset)
1944 xdr_encode_hyper(cd->offset, (u64) offset);
1945
1946 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1947 if (buflen < 0)
1948 goto fail;
1949
1950 *p++ = xdr_one; /* mark entry present */
1951 cd->offset = p; /* remember pointer */
1952 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1953 p = xdr_encode_array(p, name, namlen); /* name length & name */
1954
1955 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
1956 switch (nfserr) {
1957 case nfs_ok:
1958 p += buflen;
1959 break;
1960 case nfserr_resource:
1961 nfserr = nfserr_toosmall;
1962 goto fail;
1963 case nfserr_dropit:
1964 goto fail;
1965 default:
1966 /*
1967 * If the client requested the RDATTR_ERROR attribute,
1968 * we stuff the error code into this attribute
1969 * and continue. If this attribute was not requested,
1970 * then in accordance with the spec, we fail the
1971 * entire READDIR operation(!)
1972 */
1973 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
1974 goto fail;
1da177e4 1975 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 1976 if (p == NULL) {
1977 nfserr = nfserr_toosmall;
1da177e4 1978 goto fail;
34081efc 1979 }
1da177e4
LT		 1980 }
1981 cd->buflen -= (p - cd->buffer);
1982 cd->buffer = p;
1983 cd->common.err = nfs_ok;
1984 return 0;
1985fail:
1986 cd->common.err = nfserr;
1987 return -EINVAL;
1988}
1989
1990static void
b37ad28b 1991nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4
LT		 1992{
1993 ENCODE_HEAD;
1994
1995 if (!nfserr) {
1996 RESERVE_SPACE(8);
1997 WRITE32(access->ac_supported);
1998 WRITE32(access->ac_resp_access);
1999 ADJUST_ARGS();
2000 }
2001}
2002
2003static void
b37ad28b 2004nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4
LT		 2005{
2006 ENCODE_SEQID_OP_HEAD;
2007
2008 if (!nfserr) {
2009 RESERVE_SPACE(sizeof(stateid_t));
2010 WRITE32(close->cl_stateid.si_generation);
2011 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
2012 ADJUST_ARGS();
2013 }
2014 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2015}
2016
2017
2018static void
b37ad28b 2019nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4
LT		 2020{
2021 ENCODE_HEAD;
2022
2023 if (!nfserr) {
2024 RESERVE_SPACE(8);
2025 WRITEMEM(commit->co_verf.data, 8);
2026 ADJUST_ARGS();
2027 }
2028}
2029
2030static void
b37ad28b 2031nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4
LT		 2032{
2033 ENCODE_HEAD;
2034
2035 if (!nfserr) {
2036 RESERVE_SPACE(32);
2037 WRITECINFO(create->cr_cinfo);
2038 WRITE32(2);
2039 WRITE32(create->cr_bmval[0]);
2040 WRITE32(create->cr_bmval[1]);
2041 ADJUST_ARGS();
2042 }
2043}
2044
b37ad28b
AV		 2045static __be32
2046nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2047{
2048 struct svc_fh *fhp = getattr->ga_fhp;
2049 int buflen;
2050
2051 if (nfserr)
2052 return nfserr;
2053
2054 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2055 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2056 resp->p, &buflen, getattr->ga_bmval,
406a7ea9 2057 resp->rqstp, 0);
1da177e4
LT		 2058 if (!nfserr)
2059 resp->p += buflen;
2060 return nfserr;
2061}
2062
2063static void
b37ad28b 2064nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh *fhp)
1da177e4
LT		 2065{
2066 unsigned int len;
2067 ENCODE_HEAD;
2068
2069 if (!nfserr) {
2070 len = fhp->fh_handle.fh_size;
2071 RESERVE_SPACE(len + 4);
2072 WRITE32(len);
2073 WRITEMEM(&fhp->fh_handle.fh_base, len);
2074 ADJUST_ARGS();
2075 }
2076}
2077
2078/*
2079* Including all fields other than the name, a LOCK4denied structure requires
2080* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2081*/
2082static void
2083nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2084{
2085 ENCODE_HEAD;
2086
2087 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2088 WRITE64(ld->ld_start);
2089 WRITE64(ld->ld_length);
2090 WRITE32(ld->ld_type);
2091 if (ld->ld_sop) {
2092 WRITEMEM(&ld->ld_clientid, 8);
2093 WRITE32(ld->ld_sop->so_owner.len);
2094 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2095 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2096 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2097 WRITE64((u64)0); /* clientid */
2098 WRITE32(0); /* length of owner name */
2099 }
2100 ADJUST_ARGS();
2101}
2102
2103static void
b37ad28b 2104nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2105{
1da177e4
LT		 2106 ENCODE_SEQID_OP_HEAD;
2107
2108 if (!nfserr) {
2109 RESERVE_SPACE(4 + sizeof(stateid_t));
2110 WRITE32(lock->lk_resp_stateid.si_generation);
2111 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2112 ADJUST_ARGS();
2113 } else if (nfserr == nfserr_denied)
2114 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2115
3a65588a 2116 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
1da177e4
LT		 2117}
2118
2119static void
b37ad28b 2120nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2121{
2122 if (nfserr == nfserr_denied)
2123 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2124}
2125
2126static void
b37ad28b 2127nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4
LT		 2128{
2129 ENCODE_SEQID_OP_HEAD;
2130
2131 if (!nfserr) {
2132 RESERVE_SPACE(sizeof(stateid_t));
2133 WRITE32(locku->lu_stateid.si_generation);
2134 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
2135 ADJUST_ARGS();
2136 }
2137
2138 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2139}
2140
2141
2142static void
b37ad28b 2143nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4
LT		 2144{
2145 ENCODE_HEAD;
2146
2147 if (!nfserr) {
2148 RESERVE_SPACE(20);
2149 WRITECINFO(link->li_cinfo);
2150 ADJUST_ARGS();
2151 }
2152}
2153
2154
2155static void
b37ad28b 2156nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4
LT		 2157{
2158 ENCODE_SEQID_OP_HEAD;
2159
2160 if (nfserr)
2161 goto out;
2162
2163 RESERVE_SPACE(36 + sizeof(stateid_t));
2164 WRITE32(open->op_stateid.si_generation);
2165 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
2166 WRITECINFO(open->op_cinfo);
2167 WRITE32(open->op_rflags);
2168 WRITE32(2);
2169 WRITE32(open->op_bmval[0]);
2170 WRITE32(open->op_bmval[1]);
2171 WRITE32(open->op_delegate_type);
2172 ADJUST_ARGS();
2173
2174 switch (open->op_delegate_type) {
2175 case NFS4_OPEN_DELEGATE_NONE:
2176 break;
2177 case NFS4_OPEN_DELEGATE_READ:
2178 RESERVE_SPACE(20 + sizeof(stateid_t));
2179 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
7b190fec 2180 WRITE32(open->op_recall);
1da177e4
LT		 2181
2182 /*
2183 * TODO: ACE's in delegations
2184 */
2185 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2186 WRITE32(0);
2187 WRITE32(0);
2188 WRITE32(0); /* XXX: is NULL principal ok? */
2189 ADJUST_ARGS();
2190 break;
2191 case NFS4_OPEN_DELEGATE_WRITE:
2192 RESERVE_SPACE(32 + sizeof(stateid_t));
2193 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
2194 WRITE32(0);
2195
2196 /*
2197 * TODO: space_limit's in delegations
2198 */
2199 WRITE32(NFS4_LIMIT_SIZE);
2200 WRITE32(~(u32)0);
2201 WRITE32(~(u32)0);
2202
2203 /*
2204 * TODO: ACE's in delegations
2205 */
2206 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2207 WRITE32(0);
2208 WRITE32(0);
2209 WRITE32(0); /* XXX: is NULL principal ok? */
2210 ADJUST_ARGS();
2211 break;
2212 default:
2213 BUG();
2214 }
2215 /* XXX save filehandle here */
2216out:
2217 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2218}
2219
2220static void
b37ad28b 2221nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4
LT		 2222{
2223 ENCODE_SEQID_OP_HEAD;
2224
2225 if (!nfserr) {
2226 RESERVE_SPACE(sizeof(stateid_t));
2227 WRITE32(oc->oc_resp_stateid.si_generation);
2228 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2229 ADJUST_ARGS();
2230 }
2231
2232 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2233}
2234
2235static void
b37ad28b 2236nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4
LT		 2237{
2238 ENCODE_SEQID_OP_HEAD;
2239
2240 if (!nfserr) {
2241 RESERVE_SPACE(sizeof(stateid_t));
2242 WRITE32(od->od_stateid.si_generation);
2243 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2244 ADJUST_ARGS();
2245 }
2246
2247 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2248}
2249
b37ad28b
AV		 2250static __be32
2251nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2252 struct nfsd4_read *read)
1da177e4
LT		 2253{
2254 u32 eof;
2255 int v, pn;
2256 unsigned long maxcount;
2257 long len;
2258 ENCODE_HEAD;
2259
2260 if (nfserr)
2261 return nfserr;
2262 if (resp->xbuf->page_len)
2263 return nfserr_resource;
2264
2265 RESERVE_SPACE(8); /* eof flag and byte count */
2266
7adae489 2267 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2268 if (maxcount > read->rd_length)
2269 maxcount = read->rd_length;
2270
2271 len = maxcount;
2272 v = 0;
2273 while (len > 0) {
44524359 2274 pn = resp->rqstp->rq_resused++;
3cc03b16 2275 resp->rqstp->rq_vec[v].iov_base =
44524359 2276 page_address(resp->rqstp->rq_respages[pn]);
3cc03b16 2277 resp->rqstp->rq_vec[v].iov_len =
44524359 2278 len < PAGE_SIZE ? len : PAGE_SIZE;
1da177e4
LT		 2279 v++;
2280 len -= PAGE_SIZE;
2281 }
2282 read->rd_vlen = v;
2283
2284 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2285 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2286 &maxcount);
2287
2288 if (nfserr == nfserr_symlink)
2289 nfserr = nfserr_inval;
2290 if (nfserr)
2291 return nfserr;
44524359
N		 2292 eof = (read->rd_offset + maxcount >=
2293 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2294
2295 WRITE32(eof);
2296 WRITE32(maxcount);
2297 ADJUST_ARGS();
6ed6decc
N		 2298 resp->xbuf->head[0].iov_len = (char*)p
2299 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2300 resp->xbuf->page_len = maxcount;
2301
6ed6decc 2302 /* Use rest of head for padding and remaining ops: */
6ed6decc 2303 resp->xbuf->tail[0].iov_base = p;
1da177e4 2304 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2305 if (maxcount&3) {
6ed6decc
N		 2306 RESERVE_SPACE(4);
2307 WRITE32(0);
1da177e4
LT		 2308 resp->xbuf->tail[0].iov_base += maxcount&3;
2309 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2310 ADJUST_ARGS();
1da177e4
LT		 2311 }
2312 return 0;
2313}
2314
b37ad28b
AV		 2315static __be32
2316nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 2317{
2318 int maxcount;
2319 char *page;
2320 ENCODE_HEAD;
2321
2322 if (nfserr)
2323 return nfserr;
2324 if (resp->xbuf->page_len)
2325 return nfserr_resource;
2326
44524359 2327 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2328
2329 maxcount = PAGE_SIZE;
2330 RESERVE_SPACE(4);
2331
2332 /*
2333 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2334 * if they would overflow the buffer. Is this kosher in NFSv4? If
2335 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2336 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2337 */
2338 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2339 if (nfserr == nfserr_isdir)
2340 return nfserr_inval;
2341 if (nfserr)
2342 return nfserr;
2343
2344 WRITE32(maxcount);
2345 ADJUST_ARGS();
6ed6decc
N		 2346 resp->xbuf->head[0].iov_len = (char*)p
2347 - (char*)resp->xbuf->head[0].iov_base;
2348 resp->xbuf->page_len = maxcount;
1da177e4 2349
6ed6decc 2350 /* Use rest of head for padding and remaining ops: */
6ed6decc 2351 resp->xbuf->tail[0].iov_base = p;
1da177e4 2352 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2353 if (maxcount&3) {
6ed6decc
N		 2354 RESERVE_SPACE(4);
2355 WRITE32(0);
1da177e4
LT		 2356 resp->xbuf->tail[0].iov_base += maxcount&3;
2357 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2358 ADJUST_ARGS();
1da177e4
LT		 2359 }
2360 return 0;
2361}
2362
b37ad28b
AV		 2363static __be32
2364nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 2365{
2366 int maxcount;
2367 loff_t offset;
2ebbc012 2368 __be32 *page, *savep, *tailbase;
1da177e4
LT		 2369 ENCODE_HEAD;
2370
2371 if (nfserr)
2372 return nfserr;
2373 if (resp->xbuf->page_len)
2374 return nfserr_resource;
2375
2376 RESERVE_SPACE(8); /* verifier */
2377 savep = p;
2378
2379 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2380 WRITE32(0);
2381 WRITE32(0);
2382 ADJUST_ARGS();
2383 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 2384 tailbase = p;
1da177e4
LT		 2385
2386 maxcount = PAGE_SIZE;
2387 if (maxcount > readdir->rd_maxcount)
2388 maxcount = readdir->rd_maxcount;
2389
2390 /*
2391 * Convert from bytes to words, account for the two words already
2392 * written, make sure to leave two words at the end for the next
2393 * pointer and eof field.
2394 */
2395 maxcount = (maxcount >> 2) - 4;
2396 if (maxcount < 0) {
2397 nfserr = nfserr_toosmall;
2398 goto err_no_verf;
2399 }
2400
44524359 2401 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2402 readdir->common.err = 0;
2403 readdir->buflen = maxcount;
2404 readdir->buffer = page;
2405 readdir->offset = NULL;
2406
2407 offset = readdir->rd_cookie;
2408 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2409 &offset,
2410 &readdir->common, nfsd4_encode_dirent);
2411 if (nfserr == nfs_ok &&
2412 readdir->common.err == nfserr_toosmall &&
2413 readdir->buffer == page)
2414 nfserr = nfserr_toosmall;
2415 if (nfserr == nfserr_symlink)
2416 nfserr = nfserr_notdir;
2417 if (nfserr)
2418 goto err_no_verf;
2419
2420 if (readdir->offset)
2421 xdr_encode_hyper(readdir->offset, offset);
2422
2423 p = readdir->buffer;
2424 *p++ = 0; /* no more entries */
2425 *p++ = htonl(readdir->common.err == nfserr_eof);
44524359
N		 2426 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2427 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
1da177e4 2428
bb6e8a9f 2429 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 2430 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 2431 resp->xbuf->tail[0].iov_len = 0;
2432 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 2433 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 2434
2435 return 0;
2436err_no_verf:
2437 p = savep;
2438 ADJUST_ARGS();
2439 return nfserr;
2440}
2441
2442static void
b37ad28b 2443nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4
LT		 2444{
2445 ENCODE_HEAD;
2446
2447 if (!nfserr) {
2448 RESERVE_SPACE(20);
2449 WRITECINFO(remove->rm_cinfo);
2450 ADJUST_ARGS();
2451 }
2452}
2453
2454static void
b37ad28b 2455nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4
LT		 2456{
2457 ENCODE_HEAD;
2458
2459 if (!nfserr) {
2460 RESERVE_SPACE(40);
2461 WRITECINFO(rename->rn_sinfo);
2462 WRITECINFO(rename->rn_tinfo);
2463 ADJUST_ARGS();
2464 }
2465}
2466
dcb488a3 2467static void
ca5c8cde 2468nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
dcb488a3
AA		 2469 struct nfsd4_secinfo *secinfo)
2470{
2471 int i = 0;
2472 struct svc_export *exp = secinfo->si_exp;
4796f457
BF		 2473 u32 nflavs;
2474 struct exp_flavor_info *flavs;
2475 struct exp_flavor_info def_flavs[2];
dcb488a3
AA		 2476 ENCODE_HEAD;
2477
2478 if (nfserr)
2479 goto out;
4796f457
BF		 2480 if (exp->ex_nflavors) {
2481 flavs = exp->ex_flavors;
2482 nflavs = exp->ex_nflavors;
2483 } else { /* Handling of some defaults in absence of real secinfo: */
2484 flavs = def_flavs;
2485 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2486 nflavs = 2;
2487 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2488 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2489 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2490 nflavs = 1;
2491 flavs[0].pseudoflavor
2492 = svcauth_gss_flavor(exp->ex_client);
2493 } else {
2494 nflavs = 1;
2495 flavs[0].pseudoflavor
2496 = exp->ex_client->flavour->flavour;
2497 }
2498 }
2499
dcb488a3 2500 RESERVE_SPACE(4);
4796f457 2501 WRITE32(nflavs);
dcb488a3 2502 ADJUST_ARGS();
4796f457
BF		 2503 for (i = 0; i < nflavs; i++) {
2504 u32 flav = flavs[i].pseudoflavor;
dcb488a3
AA		 2505 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2506
2507 if (gm) {
2508 RESERVE_SPACE(4);
2509 WRITE32(RPC_AUTH_GSS);
2510 ADJUST_ARGS();
2511 RESERVE_SPACE(4 + gm->gm_oid.len);
2512 WRITE32(gm->gm_oid.len);
2513 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2514 ADJUST_ARGS();
2515 RESERVE_SPACE(4);
2516 WRITE32(0); /* qop */
2517 ADJUST_ARGS();
2518 RESERVE_SPACE(4);
2519 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2520 ADJUST_ARGS();
2521 gss_mech_put(gm);
2522 } else {
2523 RESERVE_SPACE(4);
2524 WRITE32(flav);
2525 ADJUST_ARGS();
2526 }
2527 }
2528out:
2529 if (exp)
2530 exp_put(exp);
2531}
2532
1da177e4
LT		 2533/*
2534 * The SETATTR encode routine is special -- it always encodes a bitmap,
2535 * regardless of the error status.
2536 */
2537static void
b37ad28b 2538nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4
LT		 2539{
2540 ENCODE_HEAD;
2541
2542 RESERVE_SPACE(12);
2543 if (nfserr) {
2544 WRITE32(2);
2545 WRITE32(0);
2546 WRITE32(0);
2547 }
2548 else {
2549 WRITE32(2);
2550 WRITE32(setattr->sa_bmval[0]);
2551 WRITE32(setattr->sa_bmval[1]);
2552 }
2553 ADJUST_ARGS();
2554}
2555
2556static void
b37ad28b 2557nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4
LT		 2558{
2559 ENCODE_HEAD;
2560
2561 if (!nfserr) {
2562 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2563 WRITEMEM(&scd->se_clientid, 8);
2564 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2565 ADJUST_ARGS();
2566 }
2567 else if (nfserr == nfserr_clid_inuse) {
2568 RESERVE_SPACE(8);
2569 WRITE32(0);
2570 WRITE32(0);
2571 ADJUST_ARGS();
2572 }
2573}
2574
2575static void
b37ad28b 2576nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4
LT		 2577{
2578 ENCODE_HEAD;
2579
2580 if (!nfserr) {
2581 RESERVE_SPACE(16);
2582 WRITE32(write->wr_bytes_written);
2583 WRITE32(write->wr_how_written);
2584 WRITEMEM(write->wr_verifier.data, 8);
2585 ADJUST_ARGS();
2586 }
2587}
2588
2589void
2590nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2591{
2ebbc012 2592 __be32 *statp;
1da177e4
LT		 2593 ENCODE_HEAD;
2594
2595 RESERVE_SPACE(8);
2596 WRITE32(op->opnum);
2597 statp = p++; /* to be backfilled at the end */
2598 ADJUST_ARGS();
2599
2600 switch (op->opnum) {
2601 case OP_ACCESS:
2602 nfsd4_encode_access(resp, op->status, &op->u.access);
2603 break;
2604 case OP_CLOSE:
2605 nfsd4_encode_close(resp, op->status, &op->u.close);
2606 break;
2607 case OP_COMMIT:
2608 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2609 break;
2610 case OP_CREATE:
2611 nfsd4_encode_create(resp, op->status, &op->u.create);
2612 break;
2613 case OP_DELEGRETURN:
2614 break;
2615 case OP_GETATTR:
2616 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2617 break;
2618 case OP_GETFH:
2619 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2620 break;
2621 case OP_LINK:
2622 nfsd4_encode_link(resp, op->status, &op->u.link);
2623 break;
2624 case OP_LOCK:
2625 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2626 break;
2627 case OP_LOCKT:
2628 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2629 break;
2630 case OP_LOCKU:
2631 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2632 break;
2633 case OP_LOOKUP:
2634 break;
2635 case OP_LOOKUPP:
2636 break;
2637 case OP_NVERIFY:
2638 break;
2639 case OP_OPEN:
2640 nfsd4_encode_open(resp, op->status, &op->u.open);
2641 break;
2642 case OP_OPEN_CONFIRM:
2643 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2644 break;
2645 case OP_OPEN_DOWNGRADE:
2646 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2647 break;
2648 case OP_PUTFH:
2649 break;
2650 case OP_PUTROOTFH:
2651 break;
2652 case OP_READ:
2653 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2654 break;
2655 case OP_READDIR:
2656 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2657 break;
2658 case OP_READLINK:
2659 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2660 break;
2661 case OP_REMOVE:
2662 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2663 break;
2664 case OP_RENAME:
2665 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2666 break;
2667 case OP_RENEW:
2668 break;
2669 case OP_RESTOREFH:
2670 break;
2671 case OP_SAVEFH:
2672 break;
dcb488a3
AA		 2673 case OP_SECINFO:
2674 nfsd4_encode_secinfo(resp, op->status, &op->u.secinfo);
2675 break;
1da177e4
LT		 2676 case OP_SETATTR:
2677 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2678 break;
2679 case OP_SETCLIENTID:
2680 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2681 break;
2682 case OP_SETCLIENTID_CONFIRM:
2683 break;
2684 case OP_VERIFY:
2685 break;
2686 case OP_WRITE:
2687 nfsd4_encode_write(resp, op->status, &op->u.write);
2688 break;
2689 case OP_RELEASE_LOCKOWNER:
2690 break;
2691 default:
2692 break;
2693 }
2694
2695 /*
2696 * Note: We write the status directly, instead of using WRITE32(),
2697 * since it is already in network byte order.
2698 */
2699 *statp = op->status;
2700}
2701
2702/*
2703 * Encode the reply stored in the stateowner reply cache
2704 *
2705 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2706 * previously sent already encoded operation.
2707 *
2708 * called with nfs4_lock_state() held
2709 */
2710void
2711nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2712{
2713 ENCODE_HEAD;
2714 struct nfs4_replay *rp = op->replay;
2715
2716 BUG_ON(!rp);
2717
2718 RESERVE_SPACE(8);
2719 WRITE32(op->opnum);
2720 *p++ = rp->rp_status; /* already xdr'ed */
2721 ADJUST_ARGS();
2722
2723 RESERVE_SPACE(rp->rp_buflen);
2724 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2725 ADJUST_ARGS();
2726}
2727
2728/*
2729 * END OF "GENERIC" ENCODE ROUTINES.
2730 */
2731
2732int
2ebbc012 2733nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 2734{
2735 return xdr_ressize_check(rqstp, p);
2736}
2737
2738void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2739{
2740 if (args->ops != args->iops) {
2741 kfree(args->ops);
2742 args->ops = args->iops;
2743 }
f99d49ad
JJ		 2744 kfree(args->tmpp);
2745 args->tmpp = NULL;
1da177e4
LT		 2746 while (args->to_free) {
2747 struct tmpbuf *tb = args->to_free;
2748 args->to_free = tb->next;
2749 tb->release(tb->buf);
2750 kfree(tb);
2751 }
2752}
2753
2754int
2ebbc012 2755nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 2756{
b37ad28b 2757 __be32 status;
1da177e4
LT		 2758
2759 args->p = p;
2760 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2761 args->pagelist = rqstp->rq_arg.pages;
2762 args->pagelen = rqstp->rq_arg.page_len;
2763 args->tmpp = NULL;
2764 args->to_free = NULL;
2765 args->ops = args->iops;
2766 args->rqstp = rqstp;
2767
2768 status = nfsd4_decode_compound(args);
2769 if (status) {
2770 nfsd4_release_compoundargs(args);
2771 }
2772 return !status;
2773}
2774
2775int
2ebbc012 2776nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 2777{
2778 /*
2779 * All that remains is to write the tag and operation count...
2780 */
2781 struct kvec *iov;
2782 p = resp->tagp;
2783 *p++ = htonl(resp->taglen);
2784 memcpy(p, resp->tag, resp->taglen);
2785 p += XDR_QUADLEN(resp->taglen);
2786 *p++ = htonl(resp->opcnt);
2787
2788 if (rqstp->rq_res.page_len)
2789 iov = &rqstp->rq_res.tail[0];
2790 else
2791 iov = &rqstp->rq_res.head[0];
2792 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2793 BUG_ON(iov->iov_len > PAGE_SIZE);
2794 return 1;
2795}
2796
2797/*
2798 * Local variables:
2799 * c-basic-offset: 8
2800 * End:
2801 */
kernel source for telekom puls (alcatel/mediatek)