projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
nfsd: fix nfsd4_encode_open buffer space reservation
[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
347e0ad9
BH		 988static __be32
989nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
990{
991 return nfs_ok;
992}
993
3c375c6f
BH		 994static __be32
995nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
996{
997 return nfserr_opnotsupp;
998}
999
347e0ad9
BH		 1000typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1001
1002static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1003 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1004 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1005 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1006 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1007 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1008 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1009 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1010 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1011 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1012 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1013 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1014 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1015 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1016 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1017 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1018 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1019 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1020 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1021 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1022 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1023 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1024 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1025 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1026 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1027 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1028 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1029 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1030 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1031 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1032 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1033 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1034 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1035 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1036 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1037 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1038 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1039 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
347e0ad9
BH		 1040};
1041
f2feb96b
BH		 1042struct nfsd4_minorversion_ops {
1043 nfsd4_dec *decoders;
1044 int nops;
1045};
1046
1047static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
ad1060c8 1048 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
f2feb96b
BH		 1049};
1050
b37ad28b 1051static __be32
1da177e4
LT		 1052nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1053{
1054 DECODE_HEAD;
1055 struct nfsd4_op *op;
f2feb96b 1056 struct nfsd4_minorversion_ops *ops;
1da177e4
LT		 1057 int i;
1058
1059 /*
1060 * XXX: According to spec, we should check the tag
1061 * for UTF-8 compliance. I'm postponing this for
1062 * now because it seems that some clients do use
1063 * binary tags.
1064 */
1065 READ_BUF(4);
1066 READ32(argp->taglen);
1067 READ_BUF(argp->taglen + 8);
1068 SAVEMEM(argp->tag, argp->taglen);
1069 READ32(argp->minorversion);
1070 READ32(argp->opcnt);
1071
1072 if (argp->taglen > NFSD4_MAX_TAGLEN)
1073 goto xdr_error;
1074 if (argp->opcnt > 100)
1075 goto xdr_error;
1076
e8c96f8c 1077 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1078 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1079 if (!argp->ops) {
1080 argp->ops = argp->iops;
817cb9d4 1081 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1082 goto xdr_error;
1083 }
1084 }
1085
f2feb96b 1086 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
30cff1ff
BH		 1087 argp->opcnt = 0;
1088
f2feb96b 1089 ops = &nfsd4_minorversion[argp->minorversion];
1da177e4
LT		 1090 for (i = 0; i < argp->opcnt; i++) {
1091 op = &argp->ops[i];
1092 op->replay = NULL;
1093
1094 /*
1095 * We can't use READ_BUF() here because we need to handle
1096 * a missing opcode as an OP_WRITE + 1. So we need to check
1097 * to see if we're truly at the end of our buffer or if there
1098 * is another page we need to flip to.
1099 */
1100
1101 if (argp->p == argp->end) {
1102 if (argp->pagelen < 4) {
1103 /* There isn't an opcode still on the wire */
1104 op->opnum = OP_WRITE + 1;
1105 op->status = nfserr_bad_xdr;
1106 argp->opcnt = i+1;
1107 break;
1108 }
1109
1110 /*
1111 * False alarm. We just hit a page boundary, but there
1112 * is still data available. Move pointer across page
1113 * boundary. *snip from READ_BUF*
1114 */
1115 argp->p = page_address(argp->pagelist[0]);
1116 argp->pagelist++;
1117 if (argp->pagelen < PAGE_SIZE) {
1118 argp->end = p + (argp->pagelen>>2);
1119 argp->pagelen = 0;
1120 } else {
1121 argp->end = p + (PAGE_SIZE>>2);
1122 argp->pagelen -= PAGE_SIZE;
1123 }
1124 }
1125 op->opnum = ntohl(*argp->p++);
1126
f2feb96b
BH		 1127 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1128 op->status = ops->decoders[op->opnum](argp, &op->u);
347e0ad9 1129 else {
1da177e4
LT		 1130 op->opnum = OP_ILLEGAL;
1131 op->status = nfserr_op_illegal;
1da177e4
LT		 1132 }
1133
1134 if (op->status) {
1135 argp->opcnt = i+1;
1136 break;
1137 }
1138 }
1139
1140 DECODE_TAIL;
1141}
1142/*
1143 * END OF "GENERIC" DECODE ROUTINES.
1144 */
1145
1146/*
1147 * START OF "GENERIC" ENCODE ROUTINES.
1148 * These may look a little ugly since they are imported from a "generic"
1149 * set of XDR encode/decode routines which are intended to be shared by
1150 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1151 *
1152 * If the pain of reading these is too great, it should be a straightforward
1153 * task to translate them into Linux-specific versions which are more
1154 * consistent with the style used in NFSv2/v3...
1155 */
2ebbc012 1156#define ENCODE_HEAD __be32 *p
1da177e4
LT		 1157
1158#define WRITE32(n) *p++ = htonl(n)
1159#define WRITE64(n) do { \
1160 *p++ = htonl((u32)((n) >> 32)); \
1161 *p++ = htonl((u32)(n)); \
1162} while (0)
5108b276 1163#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1164 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1165 memcpy(p, ptr, nbytes); \
1166 p += XDR_QUADLEN(nbytes); \
5108b276 1167}} while (0)
1da177e4
LT		 1168#define WRITECINFO(c) do { \
1169 *p++ = htonl(c.atomic); \
1170 *p++ = htonl(c.before_ctime_sec); \
1171 *p++ = htonl(c.before_ctime_nsec); \
1172 *p++ = htonl(c.after_ctime_sec); \
1173 *p++ = htonl(c.after_ctime_nsec); \
1174} while (0)
1175
1176#define RESERVE_SPACE(nbytes) do { \
1177 p = resp->p; \
1178 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1179} while (0)
1180#define ADJUST_ARGS() resp->p = p
1181
1182/*
1183 * Header routine to setup seqid operation replay cache
1184 */
1185#define ENCODE_SEQID_OP_HEAD \
2ebbc012
AV		 1186 __be32 *p; \
1187 __be32 *save; \
1da177e4
LT		 1188 \
1189 save = resp->p;
1190
1191/*
7fb64cee
N		 1192 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1193 * is where sequence id's are incremented, and the replay cache is filled.
1194 * Note that we increment sequence id's here, at the last moment, so we're sure
1195 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1196 */
1197
1198#define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1199 if (seqid_mutating_err(nfserr) && stateowner) { \
bd9aac52 1200 stateowner->so_seqid++; \
1da177e4
LT		 1201 stateowner->so_replay.rp_status = nfserr; \
1202 stateowner->so_replay.rp_buflen = \
1203 (((char *)(resp)->p - (char *)save)); \
1204 memcpy(stateowner->so_replay.rp_buf, save, \
1205 stateowner->so_replay.rp_buflen); \
1206 } } while (0);
1207
81c3f413
BF		 1208/* Encode as an array of strings the string given with components
1209 * seperated @sep.
1210 */
b37ad28b 1211static __be32 nfsd4_encode_components(char sep, char *components,
2ebbc012 1212 __be32 **pp, int *buflen)
81c3f413 1213{
2ebbc012
AV		 1214 __be32 *p = *pp;
1215 __be32 *countp = p;
81c3f413
BF		 1216 int strlen, count=0;
1217 char *str, *end;
1218
1219 dprintk("nfsd4_encode_components(%s)\n", components);
1220 if ((*buflen -= 4) < 0)
1221 return nfserr_resource;
1222 WRITE32(0); /* We will fill this in with @count later */
1223 end = str = components;
1224 while (*end) {
1225 for (; *end && (*end != sep); end++)
1226 ; /* Point to end of component */
1227 strlen = end - str;
1228 if (strlen) {
1229 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1230 return nfserr_resource;
1231 WRITE32(strlen);
1232 WRITEMEM(str, strlen);
1233 count++;
1234 }
1235 else
1236 end++;
1237 str = end;
1238 }
1239 *pp = p;
1240 p = countp;
1241 WRITE32(count);
1242 return 0;
1243}
1244
1245/*
1246 * encode a location element of a fs_locations structure
1247 */
b37ad28b 1248static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1249 __be32 **pp, int *buflen)
81c3f413 1250{
b37ad28b 1251 __be32 status;
2ebbc012 1252 __be32 *p = *pp;
81c3f413
BF		 1253
1254 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1255 if (status)
1256 return status;
1257 status = nfsd4_encode_components('/', location->path, &p, buflen);
1258 if (status)
1259 return status;
1260 *pp = p;
1261 return 0;
1262}
1263
1264/*
1265 * Return the path to an export point in the pseudo filesystem namespace
1266 * Returned string is safe to use as long as the caller holds a reference
1267 * to @exp.
1268 */
b37ad28b 1269static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
81c3f413
BF		 1270{
1271 struct svc_fh tmp_fh;
1272 char *path, *rootpath;
81c3f413
BF		 1273
1274 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb 1275 *stat = exp_pseudoroot(rqstp, &tmp_fh);
cc45f017
AV		 1276 if (*stat)
1277 return NULL;
54775491 1278 rootpath = tmp_fh.fh_export->ex_pathname;
81c3f413 1279
54775491 1280 path = exp->ex_pathname;
81c3f413
BF		 1281
1282 if (strncmp(path, rootpath, strlen(rootpath))) {
817cb9d4 1283 dprintk("nfsd: fs_locations failed;"
81c3f413 1284 "%s is not contained in %s\n", path, rootpath);
cc45f017
AV		 1285 *stat = nfserr_notsupp;
1286 return NULL;
81c3f413
BF		 1287 }
1288
1289 return path + strlen(rootpath);
1290}
1291
1292/*
1293 * encode a fs_locations structure
1294 */
b37ad28b 1295static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1296 struct svc_export *exp,
2ebbc012 1297 __be32 **pp, int *buflen)
81c3f413 1298{
b37ad28b 1299 __be32 status;
cc45f017 1300 int i;
2ebbc012 1301 __be32 *p = *pp;
81c3f413 1302 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
cc45f017 1303 char *root = nfsd4_path(rqstp, exp, &status);
81c3f413 1304
cc45f017
AV		 1305 if (status)
1306 return status;
81c3f413
BF		 1307 status = nfsd4_encode_components('/', root, &p, buflen);
1308 if (status)
1309 return status;
1310 if ((*buflen -= 4) < 0)
1311 return nfserr_resource;
1312 WRITE32(fslocs->locations_count);
1313 for (i=0; i<fslocs->locations_count; i++) {
1314 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1315 &p, buflen);
1316 if (status)
1317 return status;
1318 }
1319 *pp = p;
1320 return 0;
1321}
1da177e4
LT		 1322
1323static u32 nfs4_ftypes[16] = {
1324 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1325 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1326 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1327 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1328};
1329
b37ad28b 1330static __be32
1da177e4 1331nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1332 __be32 **p, int *buflen)
1da177e4
LT		 1333{
1334 int status;
1335
1336 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1337 return nfserr_resource;
1338 if (whotype != NFS4_ACL_WHO_NAMED)
1339 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1340 else if (group)
1341 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1342 else
1343 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1344 if (status < 0)
1345 return nfserrno(status);
1346 *p = xdr_encode_opaque(*p, NULL, status);
1347 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1348 BUG_ON(*buflen < 0);
1349 return 0;
1350}
1351
b37ad28b 1352static inline __be32
2ebbc012 1353nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1da177e4
LT		 1354{
1355 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1356}
1357
b37ad28b 1358static inline __be32
2ebbc012 1359nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1da177e4
LT		 1360{
1361 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1362}
1363
b37ad28b 1364static inline __be32
1da177e4 1365nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1366 __be32 **p, int *buflen)
1da177e4
LT		 1367{
1368 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1369}
1370
42ca0993
BF		 1371#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1372 FATTR4_WORD0_RDATTR_ERROR)
1373#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1374
b37ad28b 1375static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1376{
1377 /* As per referral draft: */
1378 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1379 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1380 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1381 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1382 *rdattr_err = NFSERR_MOVED;
1383 else
1384 return nfserr_moved;
1385 }
1386 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1387 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1388 return 0;
1389}
1da177e4
LT		 1390
1391/*
1392 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1393 * ourselves.
1394 *
1395 * @countp is the buffer size in _words_; upon successful return this becomes
1396 * replaced with the number of words written.
1397 */
b37ad28b 1398__be32
1da177e4 1399nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2ebbc012 1400 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
406a7ea9 1401 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 1402{
1403 u32 bmval0 = bmval[0];
1404 u32 bmval1 = bmval[1];
1405 struct kstat stat;
1406 struct svc_fh tempfh;
1407 struct kstatfs statfs;
1408 int buflen = *countp << 2;
2ebbc012 1409 __be32 *attrlenp;
1da177e4
LT		 1410 u32 dummy;
1411 u64 dummy64;
42ca0993 1412 u32 rdattr_err = 0;
2ebbc012 1413 __be32 *p = buffer;
b37ad28b 1414 __be32 status;
b8dd7b9a 1415 int err;
1da177e4
LT		 1416 int aclsupport = 0;
1417 struct nfs4_acl *acl = NULL;
1418
1419 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1420 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1421 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1422
42ca0993
BF		 1423 if (exp->ex_fslocs.migrated) {
1424 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1425 if (status)
1426 goto out;
1427 }
1428
54775491 1429 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
b8dd7b9a 1430 if (err)
1da177e4 1431 goto out_nfserr;
a16e92ed
BF		 1432 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1433 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 1434 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1435 FATTR4_WORD1_SPACE_TOTAL))) {
b8dd7b9a
AV		 1436 err = vfs_statfs(dentry, &statfs);
1437 if (err)
1da177e4
LT		 1438 goto out_nfserr;
1439 }
1440 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1441 fh_init(&tempfh, NFS4_FHSIZE);
1442 status = fh_compose(&tempfh, exp, dentry, NULL);
1443 if (status)
1444 goto out;
1445 fhp = &tempfh;
1446 }
1447 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1448 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 1449 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1450 aclsupport = (err == 0);
1da177e4 1451 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 1452 if (err == -EOPNOTSUPP)
1da177e4 1453 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 1454 else if (err == -EINVAL) {
1da177e4
LT		 1455 status = nfserr_attrnotsupp;
1456 goto out;
b8dd7b9a 1457 } else if (err != 0)
1da177e4
LT		 1458 goto out_nfserr;
1459 }
1460 }
81c3f413
BF		 1461 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1462 if (exp->ex_fslocs.locations == NULL) {
1463 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1464 }
1465 }
1da177e4
LT		 1466 if ((buflen -= 16) < 0)
1467 goto out_resource;
1468
1469 WRITE32(2);
1470 WRITE32(bmval0);
1471 WRITE32(bmval1);
1472 attrlenp = p++; /* to be backfilled later */
1473
1474 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
42ca0993 1475 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1da177e4
LT		 1476 if ((buflen -= 12) < 0)
1477 goto out_resource;
42ca0993
BF		 1478 if (!aclsupport)
1479 word0 &= ~FATTR4_WORD0_ACL;
1480 if (!exp->ex_fslocs.locations)
1481 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1da177e4 1482 WRITE32(2);
42ca0993 1483 WRITE32(word0);
1da177e4
LT		 1484 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1485 }
1486 if (bmval0 & FATTR4_WORD0_TYPE) {
1487 if ((buflen -= 4) < 0)
1488 goto out_resource;
1489 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1490 if (dummy == NF4BAD)
1491 goto out_serverfault;
1492 WRITE32(dummy);
1493 }
1494 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1495 if ((buflen -= 4) < 0)
1496 goto out_resource;
49640001 1497 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 1498 WRITE32(NFS4_FH_PERSISTENT);
49640001 1499 else
e34ac862 1500 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 1501 }
1502 if (bmval0 & FATTR4_WORD0_CHANGE) {
1503 /*
1504 * Note: This _must_ be consistent with the scheme for writing
1505 * change_info, so any changes made here must be reflected there
1506 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1507 * macro above.)
1508 */
1509 if ((buflen -= 8) < 0)
1510 goto out_resource;
1511 WRITE32(stat.ctime.tv_sec);
1512 WRITE32(stat.ctime.tv_nsec);
1513 }
1514 if (bmval0 & FATTR4_WORD0_SIZE) {
1515 if ((buflen -= 8) < 0)
1516 goto out_resource;
1517 WRITE64(stat.size);
1518 }
1519 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1520 if ((buflen -= 4) < 0)
1521 goto out_resource;
1522 WRITE32(1);
1523 }
1524 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1525 if ((buflen -= 4) < 0)
1526 goto out_resource;
1527 WRITE32(1);
1528 }
1529 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1530 if ((buflen -= 4) < 0)
1531 goto out_resource;
1532 WRITE32(0);
1533 }
1534 if (bmval0 & FATTR4_WORD0_FSID) {
1535 if ((buflen -= 16) < 0)
1536 goto out_resource;
42ca0993
BF		 1537 if (exp->ex_fslocs.migrated) {
1538 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1539 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 1540 } else switch(fsid_source(fhp)) {
1541 case FSIDSOURCE_FSID:
1da177e4
LT		 1542 WRITE64((u64)exp->ex_fsid);
1543 WRITE64((u64)0);
af6a4e28
N		 1544 break;
1545 case FSIDSOURCE_DEV:
1da177e4
LT		 1546 WRITE32(0);
1547 WRITE32(MAJOR(stat.dev));
1548 WRITE32(0);
1549 WRITE32(MINOR(stat.dev));
af6a4e28
N		 1550 break;
1551 case FSIDSOURCE_UUID:
1552 WRITEMEM(exp->ex_uuid, 16);
1553 break;
1da177e4
LT		 1554 }
1555 }
1556 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1557 if ((buflen -= 4) < 0)
1558 goto out_resource;
1559 WRITE32(0);
1560 }
1561 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1562 if ((buflen -= 4) < 0)
1563 goto out_resource;
1564 WRITE32(NFSD_LEASE_TIME);
1565 }
1566 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1567 if ((buflen -= 4) < 0)
1568 goto out_resource;
42ca0993 1569 WRITE32(rdattr_err);
1da177e4
LT		 1570 }
1571 if (bmval0 & FATTR4_WORD0_ACL) {
1572 struct nfs4_ace *ace;
1da177e4
LT		 1573
1574 if (acl == NULL) {
1575 if ((buflen -= 4) < 0)
1576 goto out_resource;
1577
1578 WRITE32(0);
1579 goto out_acl;
1580 }
1581 if ((buflen -= 4) < 0)
1582 goto out_resource;
1583 WRITE32(acl->naces);
1584
28e05dd8 1585 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 1586 if ((buflen -= 4*3) < 0)
1587 goto out_resource;
1588 WRITE32(ace->type);
1589 WRITE32(ace->flag);
1590 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1591 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1592 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1593 &p, &buflen);
1594 if (status == nfserr_resource)
1595 goto out_resource;
1596 if (status)
1597 goto out;
1598 }
1599 }
1600out_acl:
1601 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1602 if ((buflen -= 4) < 0)
1603 goto out_resource;
1604 WRITE32(aclsupport ?
1605 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1606 }
1607 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1608 if ((buflen -= 4) < 0)
1609 goto out_resource;
1610 WRITE32(1);
1611 }
1612 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1613 if ((buflen -= 4) < 0)
1614 goto out_resource;
1615 WRITE32(1);
1616 }
1617 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1618 if ((buflen -= 4) < 0)
1619 goto out_resource;
1620 WRITE32(1);
1621 }
1622 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1623 if ((buflen -= 4) < 0)
1624 goto out_resource;
1625 WRITE32(1);
1626 }
1627 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1628 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1629 if (buflen < 0)
1630 goto out_resource;
1631 WRITE32(fhp->fh_handle.fh_size);
1632 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1633 }
1634 if (bmval0 & FATTR4_WORD0_FILEID) {
1635 if ((buflen -= 8) < 0)
1636 goto out_resource;
40ee5dc6 1637 WRITE64(stat.ino);
1da177e4
LT		 1638 }
1639 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1640 if ((buflen -= 8) < 0)
1641 goto out_resource;
1642 WRITE64((u64) statfs.f_ffree);
1643 }
1644 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1645 if ((buflen -= 8) < 0)
1646 goto out_resource;
1647 WRITE64((u64) statfs.f_ffree);
1648 }
1649 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1650 if ((buflen -= 8) < 0)
1651 goto out_resource;
1652 WRITE64((u64) statfs.f_files);
1653 }
81c3f413
BF		 1654 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1655 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1656 if (status == nfserr_resource)
1657 goto out_resource;
1658 if (status)
1659 goto out;
1660 }
1da177e4
LT		 1661 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1662 if ((buflen -= 4) < 0)
1663 goto out_resource;
1664 WRITE32(1);
1665 }
1666 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1667 if ((buflen -= 8) < 0)
1668 goto out_resource;
1669 WRITE64(~(u64)0);
1670 }
1671 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1672 if ((buflen -= 4) < 0)
1673 goto out_resource;
1674 WRITE32(255);
1675 }
1676 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1677 if ((buflen -= 4) < 0)
1678 goto out_resource;
a16e92ed 1679 WRITE32(statfs.f_namelen);
1da177e4
LT		 1680 }
1681 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1682 if ((buflen -= 8) < 0)
1683 goto out_resource;
7adae489 1684 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 1685 }
1686 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1687 if ((buflen -= 8) < 0)
1688 goto out_resource;
7adae489 1689 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 1690 }
1691 if (bmval1 & FATTR4_WORD1_MODE) {
1692 if ((buflen -= 4) < 0)
1693 goto out_resource;
1694 WRITE32(stat.mode & S_IALLUGO);
1695 }
1696 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1697 if ((buflen -= 4) < 0)
1698 goto out_resource;
1699 WRITE32(1);
1700 }
1701 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1702 if ((buflen -= 4) < 0)
1703 goto out_resource;
1704 WRITE32(stat.nlink);
1705 }
1706 if (bmval1 & FATTR4_WORD1_OWNER) {
1707 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1708 if (status == nfserr_resource)
1709 goto out_resource;
1710 if (status)
1711 goto out;
1712 }
1713 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1714 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1715 if (status == nfserr_resource)
1716 goto out_resource;
1717 if (status)
1718 goto out;
1719 }
1720 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1721 if ((buflen -= 8) < 0)
1722 goto out_resource;
1723 WRITE32((u32) MAJOR(stat.rdev));
1724 WRITE32((u32) MINOR(stat.rdev));
1725 }
1726 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1727 if ((buflen -= 8) < 0)
1728 goto out_resource;
1729 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1730 WRITE64(dummy64);
1731 }
1732 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1733 if ((buflen -= 8) < 0)
1734 goto out_resource;
1735 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1736 WRITE64(dummy64);
1737 }
1738 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1739 if ((buflen -= 8) < 0)
1740 goto out_resource;
1741 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1742 WRITE64(dummy64);
1743 }
1744 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1745 if ((buflen -= 8) < 0)
1746 goto out_resource;
1747 dummy64 = (u64)stat.blocks << 9;
1748 WRITE64(dummy64);
1749 }
1750 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1751 if ((buflen -= 12) < 0)
1752 goto out_resource;
1753 WRITE32(0);
1754 WRITE32(stat.atime.tv_sec);
1755 WRITE32(stat.atime.tv_nsec);
1756 }
1757 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1758 if ((buflen -= 12) < 0)
1759 goto out_resource;
1760 WRITE32(0);
1761 WRITE32(1);
1762 WRITE32(0);
1763 }
1764 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1765 if ((buflen -= 12) < 0)
1766 goto out_resource;
1767 WRITE32(0);
1768 WRITE32(stat.ctime.tv_sec);
1769 WRITE32(stat.ctime.tv_nsec);
1770 }
1771 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1772 if ((buflen -= 12) < 0)
1773 goto out_resource;
1774 WRITE32(0);
1775 WRITE32(stat.mtime.tv_sec);
1776 WRITE32(stat.mtime.tv_nsec);
1777 }
1778 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 1779 if ((buflen -= 8) < 0)
1780 goto out_resource;
406a7ea9
FF		 1781 /*
1782 * Get parent's attributes if not ignoring crossmount
1783 * and this is the root of a cross-mounted filesystem.
1784 */
1785 if (ignore_crossmnt == 0 &&
54775491
JB		 1786 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
1787 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
1788 exp->ex_path.mnt->mnt_mountpoint, &stat);
40ee5dc6
PS		 1789 if (err)
1790 goto out_nfserr;
1791 }
1792 WRITE64(stat.ino);
1da177e4
LT		 1793 }
1794 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1795 *countp = p - buffer;
1796 status = nfs_ok;
1797
1798out:
28e05dd8 1799 kfree(acl);
1da177e4
LT		 1800 if (fhp == &tempfh)
1801 fh_put(&tempfh);
1802 return status;
1803out_nfserr:
b8dd7b9a 1804 status = nfserrno(err);
1da177e4
LT		 1805 goto out;
1806out_resource:
1807 *countp = 0;
1808 status = nfserr_resource;
1809 goto out;
1810out_serverfault:
1811 status = nfserr_serverfault;
1812 goto out;
1813}
1814
c0ce6ec8
BF		 1815static inline int attributes_need_mount(u32 *bmval)
1816{
1817 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
1818 return 1;
1819 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
1820 return 1;
1821 return 0;
1822}
1823
b37ad28b 1824static __be32
1da177e4 1825nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2ebbc012 1826 const char *name, int namlen, __be32 *p, int *buflen)
1da177e4
LT		 1827{
1828 struct svc_export *exp = cd->rd_fhp->fh_export;
1829 struct dentry *dentry;
b37ad28b 1830 __be32 nfserr;
406a7ea9 1831 int ignore_crossmnt = 0;
1da177e4
LT		 1832
1833 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1834 if (IS_ERR(dentry))
1835 return nfserrno(PTR_ERR(dentry));
1836
1837 exp_get(exp);
406a7ea9
FF		 1838 /*
1839 * In the case of a mountpoint, the client may be asking for
1840 * attributes that are only properties of the underlying filesystem
1841 * as opposed to the cross-mounted file system. In such a case,
1842 * we will not follow the cross mount and will fill the attribtutes
1843 * directly from the mountpoint dentry.
1844 */
c0ce6ec8 1845 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
406a7ea9
FF		 1846 ignore_crossmnt = 1;
1847 else if (d_mountpoint(dentry)) {
021d3a72
BF		 1848 int err;
1849
dcb488a3
AA		 1850 /*
1851 * Why the heck aren't we just using nfsd_lookup??
1852 * Different "."/".." handling? Something else?
1853 * At least, add a comment here to explain....
1854 */
021d3a72
BF		 1855 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
1856 if (err) {
1857 nfserr = nfserrno(err);
1da177e4
LT		 1858 goto out_put;
1859 }
dcb488a3
AA		 1860 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
1861 if (nfserr)
1862 goto out_put;
1da177e4
LT		 1863
1864 }
1865 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 1866 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 1867out_put:
1868 dput(dentry);
1869 exp_put(exp);
1870 return nfserr;
1871}
1872
2ebbc012 1873static __be32 *
b37ad28b 1874nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 1875{
2ebbc012 1876 __be32 *attrlenp;
1da177e4
LT		 1877
1878 if (buflen < 6)
1879 return NULL;
1880 *p++ = htonl(2);
1881 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
1882 *p++ = htonl(0); /* bmval1 */
1883
1884 attrlenp = p++;
1885 *p++ = nfserr; /* no htonl */
1886 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1887 return p;
1888}
1889
1890static int
a0ad13ef
N		 1891nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
1892 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 1893{
a0ad13ef 1894 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 1895 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1896 int buflen;
2ebbc012 1897 __be32 *p = cd->buffer;
b37ad28b 1898 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 1899
1900 /* In nfsv4, "." and ".." never make it onto the wire.. */
1901 if (name && isdotent(name, namlen)) {
1902 cd->common.err = nfs_ok;
1903 return 0;
1904 }
1905
1906 if (cd->offset)
1907 xdr_encode_hyper(cd->offset, (u64) offset);
1908
1909 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1910 if (buflen < 0)
1911 goto fail;
1912
1913 *p++ = xdr_one; /* mark entry present */
1914 cd->offset = p; /* remember pointer */
1915 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1916 p = xdr_encode_array(p, name, namlen); /* name length & name */
1917
1918 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
1919 switch (nfserr) {
1920 case nfs_ok:
1921 p += buflen;
1922 break;
1923 case nfserr_resource:
1924 nfserr = nfserr_toosmall;
1925 goto fail;
1926 case nfserr_dropit:
1927 goto fail;
1928 default:
1929 /*
1930 * If the client requested the RDATTR_ERROR attribute,
1931 * we stuff the error code into this attribute
1932 * and continue. If this attribute was not requested,
1933 * then in accordance with the spec, we fail the
1934 * entire READDIR operation(!)
1935 */
1936 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
1937 goto fail;
1da177e4 1938 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 1939 if (p == NULL) {
1940 nfserr = nfserr_toosmall;
1da177e4 1941 goto fail;
34081efc 1942 }
1da177e4
LT		 1943 }
1944 cd->buflen -= (p - cd->buffer);
1945 cd->buffer = p;
1946 cd->common.err = nfs_ok;
1947 return 0;
1948fail:
1949 cd->common.err = nfserr;
1950 return -EINVAL;
1951}
1952
695e12f8 1953static __be32
b37ad28b 1954nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4
LT		 1955{
1956 ENCODE_HEAD;
1957
1958 if (!nfserr) {
1959 RESERVE_SPACE(8);
1960 WRITE32(access->ac_supported);
1961 WRITE32(access->ac_resp_access);
1962 ADJUST_ARGS();
1963 }
695e12f8 1964 return nfserr;
1da177e4
LT		 1965}
1966
695e12f8 1967static __be32
b37ad28b 1968nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4
LT		 1969{
1970 ENCODE_SEQID_OP_HEAD;
1971
1972 if (!nfserr) {
1973 RESERVE_SPACE(sizeof(stateid_t));
1974 WRITE32(close->cl_stateid.si_generation);
1975 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
1976 ADJUST_ARGS();
1977 }
1978 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
695e12f8 1979 return nfserr;
1da177e4
LT		 1980}
1981
1982
695e12f8 1983static __be32
b37ad28b 1984nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4
LT		 1985{
1986 ENCODE_HEAD;
1987
1988 if (!nfserr) {
1989 RESERVE_SPACE(8);
1990 WRITEMEM(commit->co_verf.data, 8);
1991 ADJUST_ARGS();
1992 }
695e12f8 1993 return nfserr;
1da177e4
LT		 1994}
1995
695e12f8 1996static __be32
b37ad28b 1997nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4
LT		 1998{
1999 ENCODE_HEAD;
2000
2001 if (!nfserr) {
2002 RESERVE_SPACE(32);
2003 WRITECINFO(create->cr_cinfo);
2004 WRITE32(2);
2005 WRITE32(create->cr_bmval[0]);
2006 WRITE32(create->cr_bmval[1]);
2007 ADJUST_ARGS();
2008 }
695e12f8 2009 return nfserr;
1da177e4
LT		 2010}
2011
b37ad28b
AV		 2012static __be32
2013nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2014{
2015 struct svc_fh *fhp = getattr->ga_fhp;
2016 int buflen;
2017
2018 if (nfserr)
2019 return nfserr;
2020
2021 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2022 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2023 resp->p, &buflen, getattr->ga_bmval,
406a7ea9 2024 resp->rqstp, 0);
1da177e4
LT		 2025 if (!nfserr)
2026 resp->p += buflen;
2027 return nfserr;
2028}
2029
695e12f8
BH		 2030static __be32
2031nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2032{
695e12f8 2033 struct svc_fh *fhp = *fhpp;
1da177e4
LT		 2034 unsigned int len;
2035 ENCODE_HEAD;
2036
2037 if (!nfserr) {
2038 len = fhp->fh_handle.fh_size;
2039 RESERVE_SPACE(len + 4);
2040 WRITE32(len);
2041 WRITEMEM(&fhp->fh_handle.fh_base, len);
2042 ADJUST_ARGS();
2043 }
695e12f8 2044 return nfserr;
1da177e4
LT		 2045}
2046
2047/*
2048* Including all fields other than the name, a LOCK4denied structure requires
2049* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2050*/
2051static void
2052nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2053{
2054 ENCODE_HEAD;
2055
2056 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2057 WRITE64(ld->ld_start);
2058 WRITE64(ld->ld_length);
2059 WRITE32(ld->ld_type);
2060 if (ld->ld_sop) {
2061 WRITEMEM(&ld->ld_clientid, 8);
2062 WRITE32(ld->ld_sop->so_owner.len);
2063 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2064 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2065 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2066 WRITE64((u64)0); /* clientid */
2067 WRITE32(0); /* length of owner name */
2068 }
2069 ADJUST_ARGS();
2070}
2071
695e12f8 2072static __be32
b37ad28b 2073nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2074{
1da177e4
LT		 2075 ENCODE_SEQID_OP_HEAD;
2076
2077 if (!nfserr) {
2078 RESERVE_SPACE(4 + sizeof(stateid_t));
2079 WRITE32(lock->lk_resp_stateid.si_generation);
2080 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2081 ADJUST_ARGS();
2082 } else if (nfserr == nfserr_denied)
2083 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2084
3a65588a 2085 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
695e12f8 2086 return nfserr;
1da177e4
LT		 2087}
2088
695e12f8 2089static __be32
b37ad28b 2090nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2091{
2092 if (nfserr == nfserr_denied)
2093 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2094 return nfserr;
1da177e4
LT		 2095}
2096
695e12f8 2097static __be32
b37ad28b 2098nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4
LT		 2099{
2100 ENCODE_SEQID_OP_HEAD;
2101
2102 if (!nfserr) {
2103 RESERVE_SPACE(sizeof(stateid_t));
2104 WRITE32(locku->lu_stateid.si_generation);
2105 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
2106 ADJUST_ARGS();
2107 }
2108
2109 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
695e12f8 2110 return nfserr;
1da177e4
LT		 2111}
2112
2113
695e12f8 2114static __be32
b37ad28b 2115nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4
LT		 2116{
2117 ENCODE_HEAD;
2118
2119 if (!nfserr) {
2120 RESERVE_SPACE(20);
2121 WRITECINFO(link->li_cinfo);
2122 ADJUST_ARGS();
2123 }
695e12f8 2124 return nfserr;
1da177e4
LT		 2125}
2126
2127
695e12f8 2128static __be32
b37ad28b 2129nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4
LT		 2130{
2131 ENCODE_SEQID_OP_HEAD;
2132
2133 if (nfserr)
2134 goto out;
2135
5033b77a 2136 RESERVE_SPACE(40 + sizeof(stateid_t));
1da177e4
LT		 2137 WRITE32(open->op_stateid.si_generation);
2138 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
2139 WRITECINFO(open->op_cinfo);
2140 WRITE32(open->op_rflags);
2141 WRITE32(2);
2142 WRITE32(open->op_bmval[0]);
2143 WRITE32(open->op_bmval[1]);
2144 WRITE32(open->op_delegate_type);
2145 ADJUST_ARGS();
2146
2147 switch (open->op_delegate_type) {
2148 case NFS4_OPEN_DELEGATE_NONE:
2149 break;
2150 case NFS4_OPEN_DELEGATE_READ:
2151 RESERVE_SPACE(20 + sizeof(stateid_t));
c47b2ca4
BH		 2152 WRITE32(open->op_delegate_stateid.si_generation);
2153 WRITEMEM(&open->op_delegate_stateid.si_opaque,
2154 sizeof(stateid_opaque_t));
7b190fec 2155 WRITE32(open->op_recall);
1da177e4
LT		 2156
2157 /*
2158 * TODO: ACE's in delegations
2159 */
2160 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2161 WRITE32(0);
2162 WRITE32(0);
2163 WRITE32(0); /* XXX: is NULL principal ok? */
2164 ADJUST_ARGS();
2165 break;
2166 case NFS4_OPEN_DELEGATE_WRITE:
2167 RESERVE_SPACE(32 + sizeof(stateid_t));
c47b2ca4
BH		 2168 WRITE32(open->op_delegate_stateid.si_generation);
2169 WRITEMEM(&open->op_delegate_stateid.si_opaque,
2170 sizeof(stateid_opaque_t));
1da177e4
LT		 2171 WRITE32(0);
2172
2173 /*
2174 * TODO: space_limit's in delegations
2175 */
2176 WRITE32(NFS4_LIMIT_SIZE);
2177 WRITE32(~(u32)0);
2178 WRITE32(~(u32)0);
2179
2180 /*
2181 * TODO: ACE's in delegations
2182 */
2183 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2184 WRITE32(0);
2185 WRITE32(0);
2186 WRITE32(0); /* XXX: is NULL principal ok? */
2187 ADJUST_ARGS();
2188 break;
2189 default:
2190 BUG();
2191 }
2192 /* XXX save filehandle here */
2193out:
2194 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
695e12f8 2195 return nfserr;
1da177e4
LT		 2196}
2197
695e12f8 2198static __be32
b37ad28b 2199nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4
LT		 2200{
2201 ENCODE_SEQID_OP_HEAD;
2202
2203 if (!nfserr) {
2204 RESERVE_SPACE(sizeof(stateid_t));
2205 WRITE32(oc->oc_resp_stateid.si_generation);
2206 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2207 ADJUST_ARGS();
2208 }
2209
2210 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
695e12f8 2211 return nfserr;
1da177e4
LT		 2212}
2213
695e12f8 2214static __be32
b37ad28b 2215nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4
LT		 2216{
2217 ENCODE_SEQID_OP_HEAD;
2218
2219 if (!nfserr) {
2220 RESERVE_SPACE(sizeof(stateid_t));
2221 WRITE32(od->od_stateid.si_generation);
2222 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2223 ADJUST_ARGS();
2224 }
2225
2226 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
695e12f8 2227 return nfserr;
1da177e4
LT		 2228}
2229
b37ad28b
AV		 2230static __be32
2231nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2232 struct nfsd4_read *read)
1da177e4
LT		 2233{
2234 u32 eof;
2235 int v, pn;
2236 unsigned long maxcount;
2237 long len;
2238 ENCODE_HEAD;
2239
2240 if (nfserr)
2241 return nfserr;
2242 if (resp->xbuf->page_len)
2243 return nfserr_resource;
2244
2245 RESERVE_SPACE(8); /* eof flag and byte count */
2246
7adae489 2247 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2248 if (maxcount > read->rd_length)
2249 maxcount = read->rd_length;
2250
2251 len = maxcount;
2252 v = 0;
2253 while (len > 0) {
44524359 2254 pn = resp->rqstp->rq_resused++;
3cc03b16 2255 resp->rqstp->rq_vec[v].iov_base =
44524359 2256 page_address(resp->rqstp->rq_respages[pn]);
3cc03b16 2257 resp->rqstp->rq_vec[v].iov_len =
44524359 2258 len < PAGE_SIZE ? len : PAGE_SIZE;
1da177e4
LT		 2259 v++;
2260 len -= PAGE_SIZE;
2261 }
2262 read->rd_vlen = v;
2263
2264 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2265 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2266 &maxcount);
2267
2268 if (nfserr == nfserr_symlink)
2269 nfserr = nfserr_inval;
2270 if (nfserr)
2271 return nfserr;
44524359
N		 2272 eof = (read->rd_offset + maxcount >=
2273 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2274
2275 WRITE32(eof);
2276 WRITE32(maxcount);
2277 ADJUST_ARGS();
6ed6decc
N		 2278 resp->xbuf->head[0].iov_len = (char*)p
2279 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2280 resp->xbuf->page_len = maxcount;
2281
6ed6decc 2282 /* Use rest of head for padding and remaining ops: */
6ed6decc 2283 resp->xbuf->tail[0].iov_base = p;
1da177e4 2284 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2285 if (maxcount&3) {
6ed6decc
N		 2286 RESERVE_SPACE(4);
2287 WRITE32(0);
1da177e4
LT		 2288 resp->xbuf->tail[0].iov_base += maxcount&3;
2289 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2290 ADJUST_ARGS();
1da177e4
LT		 2291 }
2292 return 0;
2293}
2294
b37ad28b
AV		 2295static __be32
2296nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 2297{
2298 int maxcount;
2299 char *page;
2300 ENCODE_HEAD;
2301
2302 if (nfserr)
2303 return nfserr;
2304 if (resp->xbuf->page_len)
2305 return nfserr_resource;
2306
44524359 2307 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2308
2309 maxcount = PAGE_SIZE;
2310 RESERVE_SPACE(4);
2311
2312 /*
2313 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2314 * if they would overflow the buffer. Is this kosher in NFSv4? If
2315 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2316 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2317 */
2318 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2319 if (nfserr == nfserr_isdir)
2320 return nfserr_inval;
2321 if (nfserr)
2322 return nfserr;
2323
2324 WRITE32(maxcount);
2325 ADJUST_ARGS();
6ed6decc
N		 2326 resp->xbuf->head[0].iov_len = (char*)p
2327 - (char*)resp->xbuf->head[0].iov_base;
2328 resp->xbuf->page_len = maxcount;
1da177e4 2329
6ed6decc 2330 /* Use rest of head for padding and remaining ops: */
6ed6decc 2331 resp->xbuf->tail[0].iov_base = p;
1da177e4 2332 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2333 if (maxcount&3) {
6ed6decc
N		 2334 RESERVE_SPACE(4);
2335 WRITE32(0);
1da177e4
LT		 2336 resp->xbuf->tail[0].iov_base += maxcount&3;
2337 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2338 ADJUST_ARGS();
1da177e4
LT		 2339 }
2340 return 0;
2341}
2342
b37ad28b
AV		 2343static __be32
2344nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 2345{
2346 int maxcount;
2347 loff_t offset;
2ebbc012 2348 __be32 *page, *savep, *tailbase;
1da177e4
LT		 2349 ENCODE_HEAD;
2350
2351 if (nfserr)
2352 return nfserr;
2353 if (resp->xbuf->page_len)
2354 return nfserr_resource;
2355
2356 RESERVE_SPACE(8); /* verifier */
2357 savep = p;
2358
2359 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2360 WRITE32(0);
2361 WRITE32(0);
2362 ADJUST_ARGS();
2363 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 2364 tailbase = p;
1da177e4
LT		 2365
2366 maxcount = PAGE_SIZE;
2367 if (maxcount > readdir->rd_maxcount)
2368 maxcount = readdir->rd_maxcount;
2369
2370 /*
2371 * Convert from bytes to words, account for the two words already
2372 * written, make sure to leave two words at the end for the next
2373 * pointer and eof field.
2374 */
2375 maxcount = (maxcount >> 2) - 4;
2376 if (maxcount < 0) {
2377 nfserr = nfserr_toosmall;
2378 goto err_no_verf;
2379 }
2380
44524359 2381 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2382 readdir->common.err = 0;
2383 readdir->buflen = maxcount;
2384 readdir->buffer = page;
2385 readdir->offset = NULL;
2386
2387 offset = readdir->rd_cookie;
2388 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2389 &offset,
2390 &readdir->common, nfsd4_encode_dirent);
2391 if (nfserr == nfs_ok &&
2392 readdir->common.err == nfserr_toosmall &&
2393 readdir->buffer == page)
2394 nfserr = nfserr_toosmall;
2395 if (nfserr == nfserr_symlink)
2396 nfserr = nfserr_notdir;
2397 if (nfserr)
2398 goto err_no_verf;
2399
2400 if (readdir->offset)
2401 xdr_encode_hyper(readdir->offset, offset);
2402
2403 p = readdir->buffer;
2404 *p++ = 0; /* no more entries */
2405 *p++ = htonl(readdir->common.err == nfserr_eof);
44524359
N		 2406 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2407 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
1da177e4 2408
bb6e8a9f 2409 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 2410 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 2411 resp->xbuf->tail[0].iov_len = 0;
2412 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 2413 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 2414
2415 return 0;
2416err_no_verf:
2417 p = savep;
2418 ADJUST_ARGS();
2419 return nfserr;
2420}
2421
695e12f8 2422static __be32
b37ad28b 2423nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4
LT		 2424{
2425 ENCODE_HEAD;
2426
2427 if (!nfserr) {
2428 RESERVE_SPACE(20);
2429 WRITECINFO(remove->rm_cinfo);
2430 ADJUST_ARGS();
2431 }
695e12f8 2432 return nfserr;
1da177e4
LT		 2433}
2434
695e12f8 2435static __be32
b37ad28b 2436nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4
LT		 2437{
2438 ENCODE_HEAD;
2439
2440 if (!nfserr) {
2441 RESERVE_SPACE(40);
2442 WRITECINFO(rename->rn_sinfo);
2443 WRITECINFO(rename->rn_tinfo);
2444 ADJUST_ARGS();
2445 }
695e12f8 2446 return nfserr;
1da177e4
LT		 2447}
2448
695e12f8 2449static __be32
ca5c8cde 2450nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
dcb488a3
AA		 2451 struct nfsd4_secinfo *secinfo)
2452{
2453 int i = 0;
2454 struct svc_export *exp = secinfo->si_exp;
4796f457
BF		 2455 u32 nflavs;
2456 struct exp_flavor_info *flavs;
2457 struct exp_flavor_info def_flavs[2];
dcb488a3
AA		 2458 ENCODE_HEAD;
2459
2460 if (nfserr)
2461 goto out;
4796f457
BF		 2462 if (exp->ex_nflavors) {
2463 flavs = exp->ex_flavors;
2464 nflavs = exp->ex_nflavors;
2465 } else { /* Handling of some defaults in absence of real secinfo: */
2466 flavs = def_flavs;
2467 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2468 nflavs = 2;
2469 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2470 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2471 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2472 nflavs = 1;
2473 flavs[0].pseudoflavor
2474 = svcauth_gss_flavor(exp->ex_client);
2475 } else {
2476 nflavs = 1;
2477 flavs[0].pseudoflavor
2478 = exp->ex_client->flavour->flavour;
2479 }
2480 }
2481
dcb488a3 2482 RESERVE_SPACE(4);
4796f457 2483 WRITE32(nflavs);
dcb488a3 2484 ADJUST_ARGS();
4796f457
BF		 2485 for (i = 0; i < nflavs; i++) {
2486 u32 flav = flavs[i].pseudoflavor;
dcb488a3
AA		 2487 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2488
2489 if (gm) {
2490 RESERVE_SPACE(4);
2491 WRITE32(RPC_AUTH_GSS);
2492 ADJUST_ARGS();
2493 RESERVE_SPACE(4 + gm->gm_oid.len);
2494 WRITE32(gm->gm_oid.len);
2495 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2496 ADJUST_ARGS();
2497 RESERVE_SPACE(4);
2498 WRITE32(0); /* qop */
2499 ADJUST_ARGS();
2500 RESERVE_SPACE(4);
2501 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2502 ADJUST_ARGS();
2503 gss_mech_put(gm);
2504 } else {
2505 RESERVE_SPACE(4);
2506 WRITE32(flav);
2507 ADJUST_ARGS();
2508 }
2509 }
2510out:
2511 if (exp)
2512 exp_put(exp);
695e12f8 2513 return nfserr;
dcb488a3
AA		 2514}
2515
1da177e4
LT		 2516/*
2517 * The SETATTR encode routine is special -- it always encodes a bitmap,
2518 * regardless of the error status.
2519 */
695e12f8 2520static __be32
b37ad28b 2521nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4
LT		 2522{
2523 ENCODE_HEAD;
2524
2525 RESERVE_SPACE(12);
2526 if (nfserr) {
2527 WRITE32(2);
2528 WRITE32(0);
2529 WRITE32(0);
2530 }
2531 else {
2532 WRITE32(2);
2533 WRITE32(setattr->sa_bmval[0]);
2534 WRITE32(setattr->sa_bmval[1]);
2535 }
2536 ADJUST_ARGS();
695e12f8 2537 return nfserr;
1da177e4
LT		 2538}
2539
695e12f8 2540static __be32
b37ad28b 2541nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4
LT		 2542{
2543 ENCODE_HEAD;
2544
2545 if (!nfserr) {
2546 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2547 WRITEMEM(&scd->se_clientid, 8);
2548 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2549 ADJUST_ARGS();
2550 }
2551 else if (nfserr == nfserr_clid_inuse) {
2552 RESERVE_SPACE(8);
2553 WRITE32(0);
2554 WRITE32(0);
2555 ADJUST_ARGS();
2556 }
695e12f8 2557 return nfserr;
1da177e4
LT		 2558}
2559
695e12f8 2560static __be32
b37ad28b 2561nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4
LT		 2562{
2563 ENCODE_HEAD;
2564
2565 if (!nfserr) {
2566 RESERVE_SPACE(16);
2567 WRITE32(write->wr_bytes_written);
2568 WRITE32(write->wr_how_written);
2569 WRITEMEM(write->wr_verifier.data, 8);
2570 ADJUST_ARGS();
2571 }
695e12f8 2572 return nfserr;
1da177e4
LT		 2573}
2574
695e12f8
BH		 2575static __be32
2576nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
2577{
2578 return nfserr;
2579}
2580
2581typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
2582
2583static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 2584 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
2585 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
2586 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
2587 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
2588 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
2589 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
2590 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
2591 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
2592 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
2593 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
2594 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
2595 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
2596 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
2597 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
2598 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
2599 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
2600 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
2601 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
2602 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
2603 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
2604 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
2605 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
2606 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
2607 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
2608 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
2609 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
2610 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
2611 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
2612 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
2613 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
2614 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
2615 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
2616 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
2617 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
2618 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
2619 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 2620};
2621
1da177e4
LT		 2622void
2623nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2624{
2ebbc012 2625 __be32 *statp;
1da177e4
LT		 2626 ENCODE_HEAD;
2627
2628 RESERVE_SPACE(8);
2629 WRITE32(op->opnum);
2630 statp = p++; /* to be backfilled at the end */
2631 ADJUST_ARGS();
2632
695e12f8
BH		 2633 if (op->opnum == OP_ILLEGAL)
2634 goto status;
2635 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
2636 !nfsd4_enc_ops[op->opnum]);
2637 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
2638status:
1da177e4
LT		 2639 /*
2640 * Note: We write the status directly, instead of using WRITE32(),
2641 * since it is already in network byte order.
2642 */
2643 *statp = op->status;
2644}
2645
2646/*
2647 * Encode the reply stored in the stateowner reply cache
2648 *
2649 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2650 * previously sent already encoded operation.
2651 *
2652 * called with nfs4_lock_state() held
2653 */
2654void
2655nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2656{
2657 ENCODE_HEAD;
2658 struct nfs4_replay *rp = op->replay;
2659
2660 BUG_ON(!rp);
2661
2662 RESERVE_SPACE(8);
2663 WRITE32(op->opnum);
2664 *p++ = rp->rp_status; /* already xdr'ed */
2665 ADJUST_ARGS();
2666
2667 RESERVE_SPACE(rp->rp_buflen);
2668 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2669 ADJUST_ARGS();
2670}
2671
2672/*
2673 * END OF "GENERIC" ENCODE ROUTINES.
2674 */
2675
2676int
2ebbc012 2677nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 2678{
2679 return xdr_ressize_check(rqstp, p);
2680}
2681
2682void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2683{
2684 if (args->ops != args->iops) {
2685 kfree(args->ops);
2686 args->ops = args->iops;
2687 }
f99d49ad
JJ		 2688 kfree(args->tmpp);
2689 args->tmpp = NULL;
1da177e4
LT		 2690 while (args->to_free) {
2691 struct tmpbuf *tb = args->to_free;
2692 args->to_free = tb->next;
2693 tb->release(tb->buf);
2694 kfree(tb);
2695 }
2696}
2697
2698int
2ebbc012 2699nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 2700{
b37ad28b 2701 __be32 status;
1da177e4
LT		 2702
2703 args->p = p;
2704 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2705 args->pagelist = rqstp->rq_arg.pages;
2706 args->pagelen = rqstp->rq_arg.page_len;
2707 args->tmpp = NULL;
2708 args->to_free = NULL;
2709 args->ops = args->iops;
2710 args->rqstp = rqstp;
2711
2712 status = nfsd4_decode_compound(args);
2713 if (status) {
2714 nfsd4_release_compoundargs(args);
2715 }
2716 return !status;
2717}
2718
2719int
2ebbc012 2720nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 2721{
2722 /*
2723 * All that remains is to write the tag and operation count...
2724 */
2725 struct kvec *iov;
2726 p = resp->tagp;
2727 *p++ = htonl(resp->taglen);
2728 memcpy(p, resp->tag, resp->taglen);
2729 p += XDR_QUADLEN(resp->taglen);
2730 *p++ = htonl(resp->opcnt);
2731
2732 if (rqstp->rq_res.page_len)
2733 iov = &rqstp->rq_res.tail[0];
2734 else
2735 iov = &rqstp->rq_res.head[0];
2736 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2737 BUG_ON(iov->iov_len > PAGE_SIZE);
2738 return 1;
2739}
2740
2741/*
2742 * Local variables:
2743 * c-basic-offset: 8
2744 * End:
2745 */
kernel source for telekom puls (alcatel/mediatek)