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nfsd: dynamically skip encoded fattr bitmap in _nfsd4_verify
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
43#include <linux/param.h>
44#include <linux/smp.h>
1da177e4
LT		 45#include <linux/fs.h>
46#include <linux/namei.h>
47#include <linux/vfs.h>
0733d213 48#include <linux/utsname.h>
1da177e4
LT		 49#include <linux/sunrpc/xdr.h>
50#include <linux/sunrpc/svc.h>
51#include <linux/sunrpc/clnt.h>
52#include <linux/nfsd/nfsd.h>
53#include <linux/nfsd/state.h>
54#include <linux/nfsd/xdr4.h>
55#include <linux/nfsd_idmap.h>
56#include <linux/nfs4.h>
57#include <linux/nfs4_acl.h>
dcb488a3 58#include <linux/sunrpc/gss_api.h>
4796f457 59#include <linux/sunrpc/svcauth_gss.h>
1da177e4
LT		 60
61#define NFSDDBG_FACILITY NFSDDBG_XDR
62
42ca0993
BF		 63/*
64 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
65 * directory in order to indicate to the client that a filesystem boundary is present
66 * We use a fixed fsid for a referral
67 */
68#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
69#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
70
b37ad28b
AV		 71static __be32
72check_filename(char *str, int len, __be32 err)
1da177e4
LT		 73{
74 int i;
75
76 if (len == 0)
77 return nfserr_inval;
78 if (isdotent(str, len))
79 return err;
80 for (i = 0; i < len; i++)
81 if (str[i] == '/')
82 return err;
83 return 0;
84}
85
86/*
87 * START OF "GENERIC" DECODE ROUTINES.
88 * These may look a little ugly since they are imported from a "generic"
89 * set of XDR encode/decode routines which are intended to be shared by
90 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
91 *
92 * If the pain of reading these is too great, it should be a straightforward
93 * task to translate them into Linux-specific versions which are more
94 * consistent with the style used in NFSv2/v3...
95 */
96#define DECODE_HEAD \
2ebbc012 97 __be32 *p; \
b37ad28b 98 __be32 status
1da177e4
LT		 99#define DECODE_TAIL \
100 status = 0; \
101out: \
102 return status; \
103xdr_error: \
817cb9d4
CL		 104 dprintk("NFSD: xdr error (%s:%d)\n", \
105 __FILE__, __LINE__); \
1da177e4
LT		 106 status = nfserr_bad_xdr; \
107 goto out
108
109#define READ32(x) (x) = ntohl(*p++)
110#define READ64(x) do { \
111 (x) = (u64)ntohl(*p++) << 32; \
112 (x) |= ntohl(*p++); \
113} while (0)
114#define READTIME(x) do { \
115 p++; \
116 (x) = ntohl(*p++); \
117 p++; \
118} while (0)
119#define READMEM(x,nbytes) do { \
120 x = (char *)p; \
121 p += XDR_QUADLEN(nbytes); \
122} while (0)
123#define SAVEMEM(x,nbytes) do { \
124 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
125 savemem(argp, p, nbytes) : \
126 (char *)p)) { \
817cb9d4
CL		 127 dprintk("NFSD: xdr error (%s:%d)\n", \
128 __FILE__, __LINE__); \
1da177e4
LT		 129 goto xdr_error; \
130 } \
131 p += XDR_QUADLEN(nbytes); \
132} while (0)
133#define COPYMEM(x,nbytes) do { \
134 memcpy((x), p, nbytes); \
135 p += XDR_QUADLEN(nbytes); \
136} while (0)
137
138/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
139#define READ_BUF(nbytes) do { \
140 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
141 p = argp->p; \
142 argp->p += XDR_QUADLEN(nbytes); \
143 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 144 dprintk("NFSD: xdr error (%s:%d)\n", \
145 __FILE__, __LINE__); \
1da177e4
LT		 146 goto xdr_error; \
147 } \
148} while (0)
149
ca2a05aa 150static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 151{
152 /* We want more bytes than seem to be available.
153 * Maybe we need a new page, maybe we have just run out
154 */
ca2a05aa 155 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 156 __be32 *p;
1da177e4
LT		 157 if (avail + argp->pagelen < nbytes)
158 return NULL;
159 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
160 return NULL;
161 /* ok, we can do it with the current plus the next page */
162 if (nbytes <= sizeof(argp->tmp))
163 p = argp->tmp;
164 else {
f99d49ad 165 kfree(argp->tmpp);
1da177e4
LT		 166 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
167 if (!p)
168 return NULL;
169
170 }
ca2a05aa
BF		 171 /*
172 * The following memcpy is safe because read_buf is always
173 * called with nbytes > avail, and the two cases above both
174 * guarantee p points to at least nbytes bytes.
175 */
1da177e4
LT		 176 memcpy(p, argp->p, avail);
177 /* step to next page */
178 argp->p = page_address(argp->pagelist[0]);
179 argp->pagelist++;
180 if (argp->pagelen < PAGE_SIZE) {
181 argp->end = p + (argp->pagelen>>2);
182 argp->pagelen = 0;
183 } else {
184 argp->end = p + (PAGE_SIZE>>2);
185 argp->pagelen -= PAGE_SIZE;
186 }
187 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
188 argp->p += XDR_QUADLEN(nbytes - avail);
189 return p;
190}
191
60adfc50
AA		 192static int zero_clientid(clientid_t *clid)
193{
194 return (clid->cl_boot == 0) && (clid->cl_id == 0);
195}
196
1da177e4
LT		 197static int
198defer_free(struct nfsd4_compoundargs *argp,
199 void (*release)(const void *), void *p)
200{
201 struct tmpbuf *tb;
202
203 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
204 if (!tb)
205 return -ENOMEM;
206 tb->buf = p;
207 tb->release = release;
208 tb->next = argp->to_free;
209 argp->to_free = tb;
210 return 0;
211}
212
2ebbc012 213static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 214{
1da177e4 215 if (p == argp->tmp) {
a4db5fe5
BF		 216 p = kmalloc(nbytes, GFP_KERNEL);
217 if (!p)
218 return NULL;
1da177e4
LT		 219 memcpy(p, argp->tmp, nbytes);
220 } else {
73dff8be 221 BUG_ON(p != argp->tmpp);
1da177e4
LT		 222 argp->tmpp = NULL;
223 }
224 if (defer_free(argp, kfree, p)) {
a4db5fe5 225 kfree(p);
1da177e4
LT		 226 return NULL;
227 } else
228 return (char *)p;
229}
230
b37ad28b 231static __be32
1da177e4
LT		 232nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
233{
234 u32 bmlen;
235 DECODE_HEAD;
236
237 bmval[0] = 0;
238 bmval[1] = 0;
239
240 READ_BUF(4);
241 READ32(bmlen);
242 if (bmlen > 1000)
243 goto xdr_error;
244
245 READ_BUF(bmlen << 2);
246 if (bmlen > 0)
247 READ32(bmval[0]);
248 if (bmlen > 1)
249 READ32(bmval[1]);
250
251 DECODE_TAIL;
252}
253
c0d6fc8a
BH		 254static u32 nfsd_attrmask[] = {
255 NFSD_WRITEABLE_ATTRS_WORD0,
256 NFSD_WRITEABLE_ATTRS_WORD1
257};
258
b37ad28b 259static __be32
c0d6fc8a
BH		 260nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, u32 *writable,
261 struct iattr *iattr, struct nfs4_acl **acl)
1da177e4
LT		 262{
263 int expected_len, len = 0;
264 u32 dummy32;
265 char *buf;
b8dd7b9a 266 int host_err;
1da177e4
LT		 267
268 DECODE_HEAD;
269 iattr->ia_valid = 0;
270 if ((status = nfsd4_decode_bitmap(argp, bmval)))
271 return status;
272
273 /*
f34f9242 274 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP;
1da177e4
LT		 275 * read-only attributes return ERR_INVAL.
276 */
277 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
278 return nfserr_attrnotsupp;
c0d6fc8a 279 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]))
1da177e4
LT		 280 return nfserr_inval;
281
282 READ_BUF(4);
283 READ32(expected_len);
284
285 if (bmval[0] & FATTR4_WORD0_SIZE) {
286 READ_BUF(8);
287 len += 8;
288 READ64(iattr->ia_size);
289 iattr->ia_valid |= ATTR_SIZE;
290 }
291 if (bmval[0] & FATTR4_WORD0_ACL) {
28e05dd8
BF		 292 int nace;
293 struct nfs4_ace *ace;
1da177e4
LT		 294
295 READ_BUF(4); len += 4;
296 READ32(nace);
297
28e05dd8
BF		 298 if (nace > NFS4_ACL_MAX)
299 return nfserr_resource;
300
301 *acl = nfs4_acl_new(nace);
1da177e4 302 if (*acl == NULL) {
b8dd7b9a 303 host_err = -ENOMEM;
1da177e4
LT		 304 goto out_nfserr;
305 }
28e05dd8 306 defer_free(argp, kfree, *acl);
1da177e4 307
28e05dd8
BF		 308 (*acl)->naces = nace;
309 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 310 READ_BUF(16); len += 16;
28e05dd8
BF		 311 READ32(ace->type);
312 READ32(ace->flag);
313 READ32(ace->access_mask);
1da177e4
LT		 314 READ32(dummy32);
315 READ_BUF(dummy32);
316 len += XDR_QUADLEN(dummy32) << 2;
317 READMEM(buf, dummy32);
28e05dd8 318 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
b8dd7b9a 319 host_err = 0;
28e05dd8
BF		 320 if (ace->whotype != NFS4_ACL_WHO_NAMED)
321 ace->who = 0;
322 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
b8dd7b9a 323 host_err = nfsd_map_name_to_gid(argp->rqstp,
28e05dd8 324 buf, dummy32, &ace->who);
1da177e4 325 else
b8dd7b9a 326 host_err = nfsd_map_name_to_uid(argp->rqstp,
28e05dd8 327 buf, dummy32, &ace->who);
b8dd7b9a 328 if (host_err)
1da177e4 329 goto out_nfserr;
1da177e4
LT		 330 }
331 } else
332 *acl = NULL;
333 if (bmval[1] & FATTR4_WORD1_MODE) {
334 READ_BUF(4);
335 len += 4;
336 READ32(iattr->ia_mode);
337 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
338 iattr->ia_valid |= ATTR_MODE;
339 }
340 if (bmval[1] & FATTR4_WORD1_OWNER) {
341 READ_BUF(4);
342 len += 4;
343 READ32(dummy32);
344 READ_BUF(dummy32);
345 len += (XDR_QUADLEN(dummy32) << 2);
346 READMEM(buf, dummy32);
b8dd7b9a 347 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
1da177e4
LT		 348 goto out_nfserr;
349 iattr->ia_valid |= ATTR_UID;
350 }
351 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
352 READ_BUF(4);
353 len += 4;
354 READ32(dummy32);
355 READ_BUF(dummy32);
356 len += (XDR_QUADLEN(dummy32) << 2);
357 READMEM(buf, dummy32);
b8dd7b9a 358 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
1da177e4
LT		 359 goto out_nfserr;
360 iattr->ia_valid |= ATTR_GID;
361 }
362 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
363 READ_BUF(4);
364 len += 4;
365 READ32(dummy32);
366 switch (dummy32) {
367 case NFS4_SET_TO_CLIENT_TIME:
368 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
369 all 32 bits of 'nseconds'. */
370 READ_BUF(12);
371 len += 12;
372 READ32(dummy32);
373 if (dummy32)
374 return nfserr_inval;
375 READ32(iattr->ia_atime.tv_sec);
376 READ32(iattr->ia_atime.tv_nsec);
377 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
378 return nfserr_inval;
379 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
380 break;
381 case NFS4_SET_TO_SERVER_TIME:
382 iattr->ia_valid |= ATTR_ATIME;
383 break;
384 default:
385 goto xdr_error;
386 }
387 }
1da177e4
LT		 388 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
389 READ_BUF(4);
390 len += 4;
391 READ32(dummy32);
392 switch (dummy32) {
393 case NFS4_SET_TO_CLIENT_TIME:
394 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
395 all 32 bits of 'nseconds'. */
396 READ_BUF(12);
397 len += 12;
398 READ32(dummy32);
399 if (dummy32)
400 return nfserr_inval;
401 READ32(iattr->ia_mtime.tv_sec);
402 READ32(iattr->ia_mtime.tv_nsec);
403 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
404 return nfserr_inval;
405 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
406 break;
407 case NFS4_SET_TO_SERVER_TIME:
408 iattr->ia_valid |= ATTR_MTIME;
409 break;
410 default:
411 goto xdr_error;
412 }
413 }
414 if (len != expected_len)
415 goto xdr_error;
416
417 DECODE_TAIL;
418
419out_nfserr:
b8dd7b9a 420 status = nfserrno(host_err);
1da177e4
LT		 421 goto out;
422}
423
e31a1b66
BH		 424static __be32
425nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
426{
427 DECODE_HEAD;
428
429 READ_BUF(sizeof(stateid_t));
430 READ32(sid->si_generation);
431 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
432
433 DECODE_TAIL;
434}
435
b37ad28b 436static __be32
1da177e4
LT		 437nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
438{
439 DECODE_HEAD;
440
441 READ_BUF(4);
442 READ32(access->ac_req_access);
443
444 DECODE_TAIL;
445}
446
b37ad28b 447static __be32
1da177e4
LT		 448nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
449{
450 DECODE_HEAD;
451
452 close->cl_stateowner = NULL;
e31a1b66 453 READ_BUF(4);
1da177e4 454 READ32(close->cl_seqid);
e31a1b66 455 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 456
457 DECODE_TAIL;
458}
459
460
b37ad28b 461static __be32
1da177e4
LT		 462nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
463{
464 DECODE_HEAD;
465
466 READ_BUF(12);
467 READ64(commit->co_offset);
468 READ32(commit->co_count);
469
470 DECODE_TAIL;
471}
472
b37ad28b 473static __be32
1da177e4
LT		 474nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
475{
476 DECODE_HEAD;
477
478 READ_BUF(4);
479 READ32(create->cr_type);
480 switch (create->cr_type) {
481 case NF4LNK:
482 READ_BUF(4);
483 READ32(create->cr_linklen);
484 READ_BUF(create->cr_linklen);
485 SAVEMEM(create->cr_linkname, create->cr_linklen);
486 break;
487 case NF4BLK:
488 case NF4CHR:
489 READ_BUF(8);
490 READ32(create->cr_specdata1);
491 READ32(create->cr_specdata2);
492 break;
493 case NF4SOCK:
494 case NF4FIFO:
495 case NF4DIR:
496 default:
497 break;
498 }
499
500 READ_BUF(4);
501 READ32(create->cr_namelen);
502 READ_BUF(create->cr_namelen);
503 SAVEMEM(create->cr_name, create->cr_namelen);
504 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
505 return status;
506
c0d6fc8a
BH		 507 status = nfsd4_decode_fattr(argp, create->cr_bmval, nfsd_attrmask,
508 &create->cr_iattr, &create->cr_acl);
509 if (status)
1da177e4
LT		 510 goto out;
511
512 DECODE_TAIL;
513}
514
b37ad28b 515static inline __be32
1da177e4
LT		 516nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
517{
e31a1b66 518 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 519}
520
b37ad28b 521static inline __be32
1da177e4
LT		 522nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
523{
524 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
525}
526
b37ad28b 527static __be32
1da177e4
LT		 528nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
529{
530 DECODE_HEAD;
531
532 READ_BUF(4);
533 READ32(link->li_namelen);
534 READ_BUF(link->li_namelen);
535 SAVEMEM(link->li_name, link->li_namelen);
536 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
537 return status;
538
539 DECODE_TAIL;
540}
541
b37ad28b 542static __be32
1da177e4
LT		 543nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
544{
545 DECODE_HEAD;
546
3a65588a 547 lock->lk_replay_owner = NULL;
1da177e4
LT		 548 /*
549 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
550 */
551 READ_BUF(28);
552 READ32(lock->lk_type);
553 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
554 goto xdr_error;
555 READ32(lock->lk_reclaim);
556 READ64(lock->lk_offset);
557 READ64(lock->lk_length);
558 READ32(lock->lk_is_new);
559
560 if (lock->lk_is_new) {
e31a1b66 561 READ_BUF(4);
1da177e4 562 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 563 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
564 if (status)
565 return status;
566 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 567 READ32(lock->lk_new_lock_seqid);
568 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
569 READ32(lock->lk_new_owner.len);
570 READ_BUF(lock->lk_new_owner.len);
571 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
572 } else {
e31a1b66
BH		 573 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
574 if (status)
575 return status;
576 READ_BUF(4);
1da177e4
LT		 577 READ32(lock->lk_old_lock_seqid);
578 }
579
580 DECODE_TAIL;
581}
582
b37ad28b 583static __be32
1da177e4
LT		 584nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
585{
586 DECODE_HEAD;
587
588 READ_BUF(32);
589 READ32(lockt->lt_type);
590 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
591 goto xdr_error;
592 READ64(lockt->lt_offset);
593 READ64(lockt->lt_length);
594 COPYMEM(&lockt->lt_clientid, 8);
595 READ32(lockt->lt_owner.len);
596 READ_BUF(lockt->lt_owner.len);
597 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
598
60adfc50
AA		 599 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
600 return nfserr_inval;
1da177e4
LT		 601 DECODE_TAIL;
602}
603
b37ad28b 604static __be32
1da177e4
LT		 605nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
606{
607 DECODE_HEAD;
608
609 locku->lu_stateowner = NULL;
e31a1b66 610 READ_BUF(8);
1da177e4
LT		 611 READ32(locku->lu_type);
612 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
613 goto xdr_error;
614 READ32(locku->lu_seqid);
e31a1b66
BH		 615 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
616 if (status)
617 return status;
618 READ_BUF(16);
1da177e4
LT		 619 READ64(locku->lu_offset);
620 READ64(locku->lu_length);
621
622 DECODE_TAIL;
623}
624
b37ad28b 625static __be32
1da177e4
LT		 626nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
627{
628 DECODE_HEAD;
629
630 READ_BUF(4);
631 READ32(lookup->lo_len);
632 READ_BUF(lookup->lo_len);
633 SAVEMEM(lookup->lo_name, lookup->lo_len);
634 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
635 return status;
636
637 DECODE_TAIL;
638}
639
b37ad28b 640static __be32
1da177e4
LT		 641nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
642{
643 DECODE_HEAD;
644
645 memset(open->op_bmval, 0, sizeof(open->op_bmval));
646 open->op_iattr.ia_valid = 0;
647 open->op_stateowner = NULL;
648
649 /* seqid, share_access, share_deny, clientid, ownerlen */
650 READ_BUF(16 + sizeof(clientid_t));
651 READ32(open->op_seqid);
652 READ32(open->op_share_access);
653 READ32(open->op_share_deny);
654 COPYMEM(&open->op_clientid, sizeof(clientid_t));
655 READ32(open->op_owner.len);
656
657 /* owner, open_flag */
658 READ_BUF(open->op_owner.len + 4);
659 SAVEMEM(open->op_owner.data, open->op_owner.len);
660 READ32(open->op_create);
661 switch (open->op_create) {
662 case NFS4_OPEN_NOCREATE:
663 break;
664 case NFS4_OPEN_CREATE:
665 READ_BUF(4);
666 READ32(open->op_createmode);
667 switch (open->op_createmode) {
668 case NFS4_CREATE_UNCHECKED:
669 case NFS4_CREATE_GUARDED:
c0d6fc8a
BH		 670 status = nfsd4_decode_fattr(argp, open->op_bmval,
671 nfsd_attrmask, &open->op_iattr, &open->op_acl);
672 if (status)
1da177e4
LT		 673 goto out;
674 break;
675 case NFS4_CREATE_EXCLUSIVE:
676 READ_BUF(8);
677 COPYMEM(open->op_verf.data, 8);
678 break;
679 default:
680 goto xdr_error;
681 }
682 break;
683 default:
684 goto xdr_error;
685 }
686
687 /* open_claim */
688 READ_BUF(4);
689 READ32(open->op_claim_type);
690 switch (open->op_claim_type) {
691 case NFS4_OPEN_CLAIM_NULL:
692 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
693 READ_BUF(4);
694 READ32(open->op_fname.len);
695 READ_BUF(open->op_fname.len);
696 SAVEMEM(open->op_fname.data, open->op_fname.len);
697 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
698 return status;
699 break;
700 case NFS4_OPEN_CLAIM_PREVIOUS:
701 READ_BUF(4);
702 READ32(open->op_delegate_type);
703 break;
704 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 705 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
706 if (status)
707 return status;
708 READ_BUF(4);
1da177e4
LT		 709 READ32(open->op_fname.len);
710 READ_BUF(open->op_fname.len);
711 SAVEMEM(open->op_fname.data, open->op_fname.len);
712 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
713 return status;
714 break;
715 default:
716 goto xdr_error;
717 }
718
719 DECODE_TAIL;
720}
721
b37ad28b 722static __be32
1da177e4
LT		 723nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
724{
725 DECODE_HEAD;
726
727 open_conf->oc_stateowner = NULL;
e31a1b66
BH		 728 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
729 if (status)
730 return status;
731 READ_BUF(4);
1da177e4
LT		 732 READ32(open_conf->oc_seqid);
733
734 DECODE_TAIL;
735}
736
b37ad28b 737static __be32
1da177e4
LT		 738nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
739{
740 DECODE_HEAD;
741
742 open_down->od_stateowner = NULL;
e31a1b66
BH		 743 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
744 if (status)
745 return status;
746 READ_BUF(12);
1da177e4
LT		 747 READ32(open_down->od_seqid);
748 READ32(open_down->od_share_access);
749 READ32(open_down->od_share_deny);
750
751 DECODE_TAIL;
752}
753
b37ad28b 754static __be32
1da177e4
LT		 755nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
756{
757 DECODE_HEAD;
758
759 READ_BUF(4);
760 READ32(putfh->pf_fhlen);
761 if (putfh->pf_fhlen > NFS4_FHSIZE)
762 goto xdr_error;
763 READ_BUF(putfh->pf_fhlen);
764 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
765
766 DECODE_TAIL;
767}
768
b37ad28b 769static __be32
1da177e4
LT		 770nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
771{
772 DECODE_HEAD;
773
e31a1b66
BH		 774 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
775 if (status)
776 return status;
777 READ_BUF(12);
1da177e4
LT		 778 READ64(read->rd_offset);
779 READ32(read->rd_length);
780
781 DECODE_TAIL;
782}
783
b37ad28b 784static __be32
1da177e4
LT		 785nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
786{
787 DECODE_HEAD;
788
789 READ_BUF(24);
790 READ64(readdir->rd_cookie);
791 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
792 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
793 READ32(readdir->rd_maxcount);
794 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
795 goto out;
796
797 DECODE_TAIL;
798}
799
b37ad28b 800static __be32
1da177e4
LT		 801nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
802{
803 DECODE_HEAD;
804
805 READ_BUF(4);
806 READ32(remove->rm_namelen);
807 READ_BUF(remove->rm_namelen);
808 SAVEMEM(remove->rm_name, remove->rm_namelen);
809 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
810 return status;
811
812 DECODE_TAIL;
813}
814
b37ad28b 815static __be32
1da177e4
LT		 816nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
817{
818 DECODE_HEAD;
819
820 READ_BUF(4);
821 READ32(rename->rn_snamelen);
822 READ_BUF(rename->rn_snamelen + 4);
823 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
824 READ32(rename->rn_tnamelen);
825 READ_BUF(rename->rn_tnamelen);
826 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
827 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
828 return status;
829 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
830 return status;
831
832 DECODE_TAIL;
833}
834
b37ad28b 835static __be32
1da177e4
LT		 836nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
837{
838 DECODE_HEAD;
839
840 READ_BUF(sizeof(clientid_t));
841 COPYMEM(clientid, sizeof(clientid_t));
842
843 DECODE_TAIL;
844}
845
dcb488a3
AA		 846static __be32
847nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
848 struct nfsd4_secinfo *secinfo)
849{
850 DECODE_HEAD;
851
852 READ_BUF(4);
853 READ32(secinfo->si_namelen);
854 READ_BUF(secinfo->si_namelen);
855 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
856 status = check_filename(secinfo->si_name, secinfo->si_namelen,
857 nfserr_noent);
858 if (status)
859 return status;
860 DECODE_TAIL;
861}
862
b37ad28b 863static __be32
1da177e4
LT		 864nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
865{
e31a1b66 866 __be32 status;
1da177e4 867
e31a1b66
BH		 868 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
869 if (status)
870 return status;
c0d6fc8a 871 return nfsd4_decode_fattr(argp, setattr->sa_bmval, nfsd_attrmask,
e31a1b66 872 &setattr->sa_iattr, &setattr->sa_acl);
1da177e4
LT		 873}
874
b37ad28b 875static __be32
1da177e4
LT		 876nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
877{
878 DECODE_HEAD;
879
880 READ_BUF(12);
881 COPYMEM(setclientid->se_verf.data, 8);
882 READ32(setclientid->se_namelen);
883
884 READ_BUF(setclientid->se_namelen + 8);
885 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
886 READ32(setclientid->se_callback_prog);
887 READ32(setclientid->se_callback_netid_len);
888
889 READ_BUF(setclientid->se_callback_netid_len + 4);
890 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
891 READ32(setclientid->se_callback_addr_len);
892
893 READ_BUF(setclientid->se_callback_addr_len + 4);
894 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
895 READ32(setclientid->se_callback_ident);
896
897 DECODE_TAIL;
898}
899
b37ad28b 900static __be32
1da177e4
LT		 901nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
902{
903 DECODE_HEAD;
904
905 READ_BUF(8 + sizeof(nfs4_verifier));
906 COPYMEM(&scd_c->sc_clientid, 8);
907 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
908
909 DECODE_TAIL;
910}
911
912/* Also used for NVERIFY */
b37ad28b 913static __be32
1da177e4
LT		 914nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
915{
916#if 0
917 struct nfsd4_compoundargs save = {
918 .p = argp->p,
919 .end = argp->end,
920 .rqstp = argp->rqstp,
921 };
922 u32 ve_bmval[2];
923 struct iattr ve_iattr; /* request */
924 struct nfs4_acl *ve_acl; /* request */
925#endif
926 DECODE_HEAD;
927
928 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
929 goto out;
930
931 /* For convenience's sake, we compare raw xdr'd attributes in
932 * nfsd4_proc_verify; however we still decode here just to return
933 * correct error in case of bad xdr. */
934#if 0
935 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
936 if (status == nfserr_inval) {
937 status = nfserrno(status);
938 goto out;
939 }
940#endif
941 READ_BUF(4);
942 READ32(verify->ve_attrlen);
943 READ_BUF(verify->ve_attrlen);
944 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
945
946 DECODE_TAIL;
947}
948
b37ad28b 949static __be32
1da177e4
LT		 950nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
951{
952 int avail;
953 int v;
954 int len;
955 DECODE_HEAD;
956
e31a1b66
BH		 957 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
958 if (status)
959 return status;
960 READ_BUF(16);
1da177e4
LT		 961 READ64(write->wr_offset);
962 READ32(write->wr_stable_how);
963 if (write->wr_stable_how > 2)
964 goto xdr_error;
965 READ32(write->wr_buflen);
966
967 /* Sorry .. no magic macros for this.. *
968 * READ_BUF(write->wr_buflen);
969 * SAVEMEM(write->wr_buf, write->wr_buflen);
970 */
971 avail = (char*)argp->end - (char*)argp->p;
972 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 973 dprintk("NFSD: xdr error (%s:%d)\n",
974 __FILE__, __LINE__);
1da177e4
LT		 975 goto xdr_error;
976 }
3cc03b16
N		 977 argp->rqstp->rq_vec[0].iov_base = p;
978 argp->rqstp->rq_vec[0].iov_len = avail;
1da177e4
LT		 979 v = 0;
980 len = write->wr_buflen;
3cc03b16
N		 981 while (len > argp->rqstp->rq_vec[v].iov_len) {
982 len -= argp->rqstp->rq_vec[v].iov_len;
1da177e4 983 v++;
3cc03b16 984 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1da177e4
LT		 985 argp->pagelist++;
986 if (argp->pagelen >= PAGE_SIZE) {
3cc03b16 987 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1da177e4
LT		 988 argp->pagelen -= PAGE_SIZE;
989 } else {
3cc03b16 990 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1da177e4
LT		 991 argp->pagelen -= len;
992 }
993 }
2ebbc012
AV		 994 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
995 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
3cc03b16 996 argp->rqstp->rq_vec[v].iov_len = len;
1da177e4
LT		 997 write->wr_vlen = v+1;
998
999 DECODE_TAIL;
1000}
1001
b37ad28b 1002static __be32
1da177e4
LT		 1003nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1004{
1005 DECODE_HEAD;
1006
1007 READ_BUF(12);
1008 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1009 READ32(rlockowner->rl_owner.len);
1010 READ_BUF(rlockowner->rl_owner.len);
1011 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1012
60adfc50
AA		 1013 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1014 return nfserr_inval;
1da177e4
LT		 1015 DECODE_TAIL;
1016}
1017
2db134eb
AA		 1018static __be32
1019nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1020 struct nfsd4_exchange_id *exid)
2db134eb 1021{
0733d213
AA		 1022 int dummy;
1023 DECODE_HEAD;
1024
1025 READ_BUF(NFS4_VERIFIER_SIZE);
1026 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1027
1028 READ_BUF(4);
1029 READ32(exid->clname.len);
1030
1031 READ_BUF(exid->clname.len);
1032 SAVEMEM(exid->clname.data, exid->clname.len);
1033
1034 READ_BUF(4);
1035 READ32(exid->flags);
1036
1037 /* Ignore state_protect4_a */
1038 READ_BUF(4);
1039 READ32(exid->spa_how);
1040 switch (exid->spa_how) {
1041 case SP4_NONE:
1042 break;
1043 case SP4_MACH_CRED:
1044 /* spo_must_enforce */
1045 READ_BUF(4);
1046 READ32(dummy);
1047 READ_BUF(dummy * 4);
1048 p += dummy;
1049
1050 /* spo_must_allow */
1051 READ_BUF(4);
1052 READ32(dummy);
1053 READ_BUF(dummy * 4);
1054 p += dummy;
1055 break;
1056 case SP4_SSV:
1057 /* ssp_ops */
1058 READ_BUF(4);
1059 READ32(dummy);
1060 READ_BUF(dummy * 4);
1061 p += dummy;
1062
1063 READ_BUF(4);
1064 READ32(dummy);
1065 READ_BUF(dummy * 4);
1066 p += dummy;
1067
1068 /* ssp_hash_algs<> */
1069 READ_BUF(4);
1070 READ32(dummy);
1071 READ_BUF(dummy);
1072 p += XDR_QUADLEN(dummy);
1073
1074 /* ssp_encr_algs<> */
1075 READ_BUF(4);
1076 READ32(dummy);
1077 READ_BUF(dummy);
1078 p += XDR_QUADLEN(dummy);
1079
1080 /* ssp_window and ssp_num_gss_handles */
1081 READ_BUF(8);
1082 READ32(dummy);
1083 READ32(dummy);
1084 break;
1085 default:
1086 goto xdr_error;
1087 }
1088
1089 /* Ignore Implementation ID */
1090 READ_BUF(4); /* nfs_impl_id4 array length */
1091 READ32(dummy);
1092
1093 if (dummy > 1)
1094 goto xdr_error;
1095
1096 if (dummy == 1) {
1097 /* nii_domain */
1098 READ_BUF(4);
1099 READ32(dummy);
1100 READ_BUF(dummy);
1101 p += XDR_QUADLEN(dummy);
1102
1103 /* nii_name */
1104 READ_BUF(4);
1105 READ32(dummy);
1106 READ_BUF(dummy);
1107 p += XDR_QUADLEN(dummy);
1108
1109 /* nii_date */
1110 READ_BUF(12);
1111 p += 3;
1112 }
1113 DECODE_TAIL;
2db134eb
AA		 1114}
1115
1116static __be32
1117nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1118 struct nfsd4_create_session *sess)
1119{
ec6b5d7b
AA		 1120 DECODE_HEAD;
1121
1122 u32 dummy;
1123 char *machine_name;
1124 int i;
1125 int nr_secflavs;
1126
1127 READ_BUF(16);
1128 COPYMEM(&sess->clientid, 8);
1129 READ32(sess->seqid);
1130 READ32(sess->flags);
1131
1132 /* Fore channel attrs */
1133 READ_BUF(28);
1134 READ32(dummy); /* headerpadsz is always 0 */
1135 READ32(sess->fore_channel.maxreq_sz);
1136 READ32(sess->fore_channel.maxresp_sz);
1137 READ32(sess->fore_channel.maxresp_cached);
1138 READ32(sess->fore_channel.maxops);
1139 READ32(sess->fore_channel.maxreqs);
1140 READ32(sess->fore_channel.nr_rdma_attrs);
1141 if (sess->fore_channel.nr_rdma_attrs == 1) {
1142 READ_BUF(4);
1143 READ32(sess->fore_channel.rdma_attrs);
1144 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1145 dprintk("Too many fore channel attr bitmaps!\n");
1146 goto xdr_error;
1147 }
1148
1149 /* Back channel attrs */
1150 READ_BUF(28);
1151 READ32(dummy); /* headerpadsz is always 0 */
1152 READ32(sess->back_channel.maxreq_sz);
1153 READ32(sess->back_channel.maxresp_sz);
1154 READ32(sess->back_channel.maxresp_cached);
1155 READ32(sess->back_channel.maxops);
1156 READ32(sess->back_channel.maxreqs);
1157 READ32(sess->back_channel.nr_rdma_attrs);
1158 if (sess->back_channel.nr_rdma_attrs == 1) {
1159 READ_BUF(4);
1160 READ32(sess->back_channel.rdma_attrs);
1161 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1162 dprintk("Too many back channel attr bitmaps!\n");
1163 goto xdr_error;
1164 }
1165
1166 READ_BUF(8);
1167 READ32(sess->callback_prog);
1168
1169 /* callback_sec_params4 */
1170 READ32(nr_secflavs);
1171 for (i = 0; i < nr_secflavs; ++i) {
1172 READ_BUF(4);
1173 READ32(dummy);
1174 switch (dummy) {
1175 case RPC_AUTH_NULL:
1176 /* Nothing to read */
1177 break;
1178 case RPC_AUTH_UNIX:
1179 READ_BUF(8);
1180 /* stamp */
1181 READ32(dummy);
1182
1183 /* machine name */
1184 READ32(dummy);
1185 READ_BUF(dummy);
1186 SAVEMEM(machine_name, dummy);
1187
1188 /* uid, gid */
1189 READ_BUF(8);
1190 READ32(sess->uid);
1191 READ32(sess->gid);
1192
1193 /* more gids */
1194 READ_BUF(4);
1195 READ32(dummy);
1196 READ_BUF(dummy * 4);
1197 for (i = 0; i < dummy; ++i)
1198 READ32(dummy);
1199 break;
1200 case RPC_AUTH_GSS:
1201 dprintk("RPC_AUTH_GSS callback secflavor "
1202 "not supported!\n");
1203 READ_BUF(8);
1204 /* gcbp_service */
1205 READ32(dummy);
1206 /* gcbp_handle_from_server */
1207 READ32(dummy);
1208 READ_BUF(dummy);
1209 p += XDR_QUADLEN(dummy);
1210 /* gcbp_handle_from_client */
1211 READ_BUF(4);
1212 READ32(dummy);
1213 READ_BUF(dummy);
1214 p += XDR_QUADLEN(dummy);
1215 break;
1216 default:
1217 dprintk("Illegal callback secflavor\n");
1218 return nfserr_inval;
1219 }
1220 }
1221 DECODE_TAIL;
2db134eb
AA		 1222}
1223
1224static __be32
1225nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1226 struct nfsd4_destroy_session *destroy_session)
1227{
e10e0cfc
BH		 1228 DECODE_HEAD;
1229 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1230 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1231
1232 DECODE_TAIL;
2db134eb
AA		 1233}
1234
1235static __be32
1236nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1237 struct nfsd4_sequence *seq)
1238{
b85d4c01
BH		 1239 DECODE_HEAD;
1240
1241 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1242 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1243 READ32(seq->seqid);
1244 READ32(seq->slotid);
1245 READ32(seq->maxslots);
1246 READ32(seq->cachethis);
1247
1248 DECODE_TAIL;
2db134eb
AA		 1249}
1250
347e0ad9
BH		 1251static __be32
1252nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1253{
1254 return nfs_ok;
1255}
1256
3c375c6f
BH		 1257static __be32
1258nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1259{
1e685ec2 1260 return nfserr_notsupp;
3c375c6f
BH		 1261}
1262
347e0ad9
BH		 1263typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1264
1265static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1266 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1267 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1268 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1269 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1270 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1271 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1272 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1273 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1274 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1275 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1276 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1277 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1278 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1279 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1280 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1281 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1282 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1283 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1284 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1285 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
a1c8c4d1 1286 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
ad1060c8
BF		 1287 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1288 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1289 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1290 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1291 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1292 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1293 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1294 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1295 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1296 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1297 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1298 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1299 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1300 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1301 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1302 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
347e0ad9
BH		 1303};
1304
2db134eb
AA		 1305static nfsd4_dec nfsd41_dec_ops[] = {
1306 [OP_ACCESS] (nfsd4_dec)nfsd4_decode_access,
1307 [OP_CLOSE] (nfsd4_dec)nfsd4_decode_close,
1308 [OP_COMMIT] (nfsd4_dec)nfsd4_decode_commit,
1309 [OP_CREATE] (nfsd4_dec)nfsd4_decode_create,
1310 [OP_DELEGPURGE] (nfsd4_dec)nfsd4_decode_notsupp,
1311 [OP_DELEGRETURN] (nfsd4_dec)nfsd4_decode_delegreturn,
1312 [OP_GETATTR] (nfsd4_dec)nfsd4_decode_getattr,
1313 [OP_GETFH] (nfsd4_dec)nfsd4_decode_noop,
1314 [OP_LINK] (nfsd4_dec)nfsd4_decode_link,
1315 [OP_LOCK] (nfsd4_dec)nfsd4_decode_lock,
1316 [OP_LOCKT] (nfsd4_dec)nfsd4_decode_lockt,
1317 [OP_LOCKU] (nfsd4_dec)nfsd4_decode_locku,
1318 [OP_LOOKUP] (nfsd4_dec)nfsd4_decode_lookup,
1319 [OP_LOOKUPP] (nfsd4_dec)nfsd4_decode_noop,
1320 [OP_NVERIFY] (nfsd4_dec)nfsd4_decode_verify,
1321 [OP_OPEN] (nfsd4_dec)nfsd4_decode_open,
1322 [OP_OPENATTR] (nfsd4_dec)nfsd4_decode_notsupp,
1323 [OP_OPEN_CONFIRM] (nfsd4_dec)nfsd4_decode_notsupp,
1324 [OP_OPEN_DOWNGRADE] (nfsd4_dec)nfsd4_decode_open_downgrade,
1325 [OP_PUTFH] (nfsd4_dec)nfsd4_decode_putfh,
1326 [OP_PUTPUBFH] (nfsd4_dec)nfsd4_decode_notsupp,
1327 [OP_PUTROOTFH] (nfsd4_dec)nfsd4_decode_noop,
1328 [OP_READ] (nfsd4_dec)nfsd4_decode_read,
1329 [OP_READDIR] (nfsd4_dec)nfsd4_decode_readdir,
1330 [OP_READLINK] (nfsd4_dec)nfsd4_decode_noop,
1331 [OP_REMOVE] (nfsd4_dec)nfsd4_decode_remove,
1332 [OP_RENAME] (nfsd4_dec)nfsd4_decode_rename,
1333 [OP_RENEW] (nfsd4_dec)nfsd4_decode_notsupp,
1334 [OP_RESTOREFH] (nfsd4_dec)nfsd4_decode_noop,
1335 [OP_SAVEFH] (nfsd4_dec)nfsd4_decode_noop,
1336 [OP_SECINFO] (nfsd4_dec)nfsd4_decode_secinfo,
1337 [OP_SETATTR] (nfsd4_dec)nfsd4_decode_setattr,
1338 [OP_SETCLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1339 [OP_SETCLIENTID_CONFIRM](nfsd4_dec)nfsd4_decode_notsupp,
1340 [OP_VERIFY] (nfsd4_dec)nfsd4_decode_verify,
1341 [OP_WRITE] (nfsd4_dec)nfsd4_decode_write,
1342 [OP_RELEASE_LOCKOWNER] (nfsd4_dec)nfsd4_decode_notsupp,
1343
1344 /* new operations for NFSv4.1 */
1345 [OP_BACKCHANNEL_CTL] (nfsd4_dec)nfsd4_decode_notsupp,
1346 [OP_BIND_CONN_TO_SESSION](nfsd4_dec)nfsd4_decode_notsupp,
1347 [OP_EXCHANGE_ID] (nfsd4_dec)nfsd4_decode_exchange_id,
1348 [OP_CREATE_SESSION] (nfsd4_dec)nfsd4_decode_create_session,
1349 [OP_DESTROY_SESSION] (nfsd4_dec)nfsd4_decode_destroy_session,
1350 [OP_FREE_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1351 [OP_GET_DIR_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1352 [OP_GETDEVICEINFO] (nfsd4_dec)nfsd4_decode_notsupp,
1353 [OP_GETDEVICELIST] (nfsd4_dec)nfsd4_decode_notsupp,
1354 [OP_LAYOUTCOMMIT] (nfsd4_dec)nfsd4_decode_notsupp,
1355 [OP_LAYOUTGET] (nfsd4_dec)nfsd4_decode_notsupp,
1356 [OP_LAYOUTRETURN] (nfsd4_dec)nfsd4_decode_notsupp,
1357 [OP_SECINFO_NO_NAME] (nfsd4_dec)nfsd4_decode_notsupp,
1358 [OP_SEQUENCE] (nfsd4_dec)nfsd4_decode_sequence,
1359 [OP_SET_SSV] (nfsd4_dec)nfsd4_decode_notsupp,
1360 [OP_TEST_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1361 [OP_WANT_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1362 [OP_DESTROY_CLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1363 [OP_RECLAIM_COMPLETE] (nfsd4_dec)nfsd4_decode_notsupp,
1364};
1365
f2feb96b
BH		 1366struct nfsd4_minorversion_ops {
1367 nfsd4_dec *decoders;
1368 int nops;
1369};
1370
1371static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
ad1060c8 1372 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
2db134eb 1373 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
f2feb96b
BH		 1374};
1375
b37ad28b 1376static __be32
1da177e4
LT		 1377nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1378{
1379 DECODE_HEAD;
1380 struct nfsd4_op *op;
f2feb96b 1381 struct nfsd4_minorversion_ops *ops;
1da177e4
LT		 1382 int i;
1383
1384 /*
1385 * XXX: According to spec, we should check the tag
1386 * for UTF-8 compliance. I'm postponing this for
1387 * now because it seems that some clients do use
1388 * binary tags.
1389 */
1390 READ_BUF(4);
1391 READ32(argp->taglen);
1392 READ_BUF(argp->taglen + 8);
1393 SAVEMEM(argp->tag, argp->taglen);
1394 READ32(argp->minorversion);
1395 READ32(argp->opcnt);
1396
1397 if (argp->taglen > NFSD4_MAX_TAGLEN)
1398 goto xdr_error;
1399 if (argp->opcnt > 100)
1400 goto xdr_error;
1401
e8c96f8c 1402 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1403 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1404 if (!argp->ops) {
1405 argp->ops = argp->iops;
817cb9d4 1406 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1407 goto xdr_error;
1408 }
1409 }
1410
f2feb96b 1411 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
30cff1ff
BH		 1412 argp->opcnt = 0;
1413
f2feb96b 1414 ops = &nfsd4_minorversion[argp->minorversion];
1da177e4
LT		 1415 for (i = 0; i < argp->opcnt; i++) {
1416 op = &argp->ops[i];
1417 op->replay = NULL;
1418
1419 /*
1420 * We can't use READ_BUF() here because we need to handle
1421 * a missing opcode as an OP_WRITE + 1. So we need to check
1422 * to see if we're truly at the end of our buffer or if there
1423 * is another page we need to flip to.
1424 */
1425
1426 if (argp->p == argp->end) {
1427 if (argp->pagelen < 4) {
1428 /* There isn't an opcode still on the wire */
1429 op->opnum = OP_WRITE + 1;
1430 op->status = nfserr_bad_xdr;
1431 argp->opcnt = i+1;
1432 break;
1433 }
1434
1435 /*
1436 * False alarm. We just hit a page boundary, but there
1437 * is still data available. Move pointer across page
1438 * boundary. *snip from READ_BUF*
1439 */
1440 argp->p = page_address(argp->pagelist[0]);
1441 argp->pagelist++;
1442 if (argp->pagelen < PAGE_SIZE) {
1443 argp->end = p + (argp->pagelen>>2);
1444 argp->pagelen = 0;
1445 } else {
1446 argp->end = p + (PAGE_SIZE>>2);
1447 argp->pagelen -= PAGE_SIZE;
1448 }
1449 }
1450 op->opnum = ntohl(*argp->p++);
1451
f2feb96b
BH		 1452 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1453 op->status = ops->decoders[op->opnum](argp, &op->u);
347e0ad9 1454 else {
1da177e4
LT		 1455 op->opnum = OP_ILLEGAL;
1456 op->status = nfserr_op_illegal;
1da177e4
LT		 1457 }
1458
1459 if (op->status) {
1460 argp->opcnt = i+1;
1461 break;
1462 }
1463 }
1464
1465 DECODE_TAIL;
1466}
1467/*
1468 * END OF "GENERIC" DECODE ROUTINES.
1469 */
1470
1471/*
1472 * START OF "GENERIC" ENCODE ROUTINES.
1473 * These may look a little ugly since they are imported from a "generic"
1474 * set of XDR encode/decode routines which are intended to be shared by
1475 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1476 *
1477 * If the pain of reading these is too great, it should be a straightforward
1478 * task to translate them into Linux-specific versions which are more
1479 * consistent with the style used in NFSv2/v3...
1480 */
2ebbc012 1481#define ENCODE_HEAD __be32 *p
1da177e4
LT		 1482
1483#define WRITE32(n) *p++ = htonl(n)
1484#define WRITE64(n) do { \
1485 *p++ = htonl((u32)((n) >> 32)); \
1486 *p++ = htonl((u32)(n)); \
1487} while (0)
5108b276 1488#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1489 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1490 memcpy(p, ptr, nbytes); \
1491 p += XDR_QUADLEN(nbytes); \
5108b276 1492}} while (0)
1da177e4
LT		 1493#define WRITECINFO(c) do { \
1494 *p++ = htonl(c.atomic); \
1495 *p++ = htonl(c.before_ctime_sec); \
1496 *p++ = htonl(c.before_ctime_nsec); \
1497 *p++ = htonl(c.after_ctime_sec); \
1498 *p++ = htonl(c.after_ctime_nsec); \
1499} while (0)
1500
1501#define RESERVE_SPACE(nbytes) do { \
1502 p = resp->p; \
1503 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1504} while (0)
1505#define ADJUST_ARGS() resp->p = p
1506
1507/*
1508 * Header routine to setup seqid operation replay cache
1509 */
1510#define ENCODE_SEQID_OP_HEAD \
2ebbc012 1511 __be32 *save; \
1da177e4
LT		 1512 \
1513 save = resp->p;
1514
1515/*
7fb64cee
N		 1516 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1517 * is where sequence id's are incremented, and the replay cache is filled.
1518 * Note that we increment sequence id's here, at the last moment, so we're sure
1519 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1520 */
1521
1522#define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1523 if (seqid_mutating_err(nfserr) && stateowner) { \
bd9aac52 1524 stateowner->so_seqid++; \
1da177e4
LT		 1525 stateowner->so_replay.rp_status = nfserr; \
1526 stateowner->so_replay.rp_buflen = \
1527 (((char *)(resp)->p - (char *)save)); \
1528 memcpy(stateowner->so_replay.rp_buf, save, \
1529 stateowner->so_replay.rp_buflen); \
1530 } } while (0);
1531
81c3f413
BF		 1532/* Encode as an array of strings the string given with components
1533 * seperated @sep.
1534 */
b37ad28b 1535static __be32 nfsd4_encode_components(char sep, char *components,
2ebbc012 1536 __be32 **pp, int *buflen)
81c3f413 1537{
2ebbc012
AV		 1538 __be32 *p = *pp;
1539 __be32 *countp = p;
81c3f413
BF		 1540 int strlen, count=0;
1541 char *str, *end;
1542
1543 dprintk("nfsd4_encode_components(%s)\n", components);
1544 if ((*buflen -= 4) < 0)
1545 return nfserr_resource;
1546 WRITE32(0); /* We will fill this in with @count later */
1547 end = str = components;
1548 while (*end) {
1549 for (; *end && (*end != sep); end++)
1550 ; /* Point to end of component */
1551 strlen = end - str;
1552 if (strlen) {
1553 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1554 return nfserr_resource;
1555 WRITE32(strlen);
1556 WRITEMEM(str, strlen);
1557 count++;
1558 }
1559 else
1560 end++;
1561 str = end;
1562 }
1563 *pp = p;
1564 p = countp;
1565 WRITE32(count);
1566 return 0;
1567}
1568
1569/*
1570 * encode a location element of a fs_locations structure
1571 */
b37ad28b 1572static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1573 __be32 **pp, int *buflen)
81c3f413 1574{
b37ad28b 1575 __be32 status;
2ebbc012 1576 __be32 *p = *pp;
81c3f413
BF		 1577
1578 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1579 if (status)
1580 return status;
1581 status = nfsd4_encode_components('/', location->path, &p, buflen);
1582 if (status)
1583 return status;
1584 *pp = p;
1585 return 0;
1586}
1587
1588/*
1589 * Return the path to an export point in the pseudo filesystem namespace
1590 * Returned string is safe to use as long as the caller holds a reference
1591 * to @exp.
1592 */
b37ad28b 1593static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
81c3f413
BF		 1594{
1595 struct svc_fh tmp_fh;
1596 char *path, *rootpath;
81c3f413
BF		 1597
1598 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb 1599 *stat = exp_pseudoroot(rqstp, &tmp_fh);
cc45f017
AV		 1600 if (*stat)
1601 return NULL;
54775491 1602 rootpath = tmp_fh.fh_export->ex_pathname;
81c3f413 1603
54775491 1604 path = exp->ex_pathname;
81c3f413
BF		 1605
1606 if (strncmp(path, rootpath, strlen(rootpath))) {
817cb9d4 1607 dprintk("nfsd: fs_locations failed;"
81c3f413 1608 "%s is not contained in %s\n", path, rootpath);
cc45f017
AV		 1609 *stat = nfserr_notsupp;
1610 return NULL;
81c3f413
BF		 1611 }
1612
1613 return path + strlen(rootpath);
1614}
1615
1616/*
1617 * encode a fs_locations structure
1618 */
b37ad28b 1619static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1620 struct svc_export *exp,
2ebbc012 1621 __be32 **pp, int *buflen)
81c3f413 1622{
b37ad28b 1623 __be32 status;
cc45f017 1624 int i;
2ebbc012 1625 __be32 *p = *pp;
81c3f413 1626 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
cc45f017 1627 char *root = nfsd4_path(rqstp, exp, &status);
81c3f413 1628
cc45f017
AV		 1629 if (status)
1630 return status;
81c3f413
BF		 1631 status = nfsd4_encode_components('/', root, &p, buflen);
1632 if (status)
1633 return status;
1634 if ((*buflen -= 4) < 0)
1635 return nfserr_resource;
1636 WRITE32(fslocs->locations_count);
1637 for (i=0; i<fslocs->locations_count; i++) {
1638 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1639 &p, buflen);
1640 if (status)
1641 return status;
1642 }
1643 *pp = p;
1644 return 0;
1645}
1da177e4
LT		 1646
1647static u32 nfs4_ftypes[16] = {
1648 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1649 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1650 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1651 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1652};
1653
b37ad28b 1654static __be32
1da177e4 1655nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1656 __be32 **p, int *buflen)
1da177e4
LT		 1657{
1658 int status;
1659
1660 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1661 return nfserr_resource;
1662 if (whotype != NFS4_ACL_WHO_NAMED)
1663 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1664 else if (group)
1665 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1666 else
1667 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1668 if (status < 0)
1669 return nfserrno(status);
1670 *p = xdr_encode_opaque(*p, NULL, status);
1671 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1672 BUG_ON(*buflen < 0);
1673 return 0;
1674}
1675
b37ad28b 1676static inline __be32
2ebbc012 1677nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1da177e4
LT		 1678{
1679 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1680}
1681
b37ad28b 1682static inline __be32
2ebbc012 1683nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1da177e4
LT		 1684{
1685 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1686}
1687
b37ad28b 1688static inline __be32
1da177e4 1689nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1690 __be32 **p, int *buflen)
1da177e4
LT		 1691{
1692 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1693}
1694
42ca0993
BF		 1695#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1696 FATTR4_WORD0_RDATTR_ERROR)
1697#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1698
b37ad28b 1699static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1700{
1701 /* As per referral draft: */
1702 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1703 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1704 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1705 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1706 *rdattr_err = NFSERR_MOVED;
1707 else
1708 return nfserr_moved;
1709 }
1710 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1711 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1712 return 0;
1713}
1da177e4
LT		 1714
1715/*
1716 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1717 * ourselves.
1718 *
1719 * @countp is the buffer size in _words_; upon successful return this becomes
1720 * replaced with the number of words written.
1721 */
b37ad28b 1722__be32
1da177e4 1723nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2ebbc012 1724 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
406a7ea9 1725 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 1726{
1727 u32 bmval0 = bmval[0];
1728 u32 bmval1 = bmval[1];
1729 struct kstat stat;
1730 struct svc_fh tempfh;
1731 struct kstatfs statfs;
1732 int buflen = *countp << 2;
2ebbc012 1733 __be32 *attrlenp;
1da177e4
LT		 1734 u32 dummy;
1735 u64 dummy64;
42ca0993 1736 u32 rdattr_err = 0;
2ebbc012 1737 __be32 *p = buffer;
b37ad28b 1738 __be32 status;
b8dd7b9a 1739 int err;
1da177e4
LT		 1740 int aclsupport = 0;
1741 struct nfs4_acl *acl = NULL;
1742
1743 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1744 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1745 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1746
42ca0993
BF		 1747 if (exp->ex_fslocs.migrated) {
1748 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1749 if (status)
1750 goto out;
1751 }
1752
54775491 1753 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
b8dd7b9a 1754 if (err)
1da177e4 1755 goto out_nfserr;
a16e92ed
BF		 1756 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1757 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 1758 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1759 FATTR4_WORD1_SPACE_TOTAL))) {
b8dd7b9a
AV		 1760 err = vfs_statfs(dentry, &statfs);
1761 if (err)
1da177e4
LT		 1762 goto out_nfserr;
1763 }
1764 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1765 fh_init(&tempfh, NFS4_FHSIZE);
1766 status = fh_compose(&tempfh, exp, dentry, NULL);
1767 if (status)
1768 goto out;
1769 fhp = &tempfh;
1770 }
1771 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1772 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 1773 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1774 aclsupport = (err == 0);
1da177e4 1775 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 1776 if (err == -EOPNOTSUPP)
1da177e4 1777 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 1778 else if (err == -EINVAL) {
1da177e4
LT		 1779 status = nfserr_attrnotsupp;
1780 goto out;
b8dd7b9a 1781 } else if (err != 0)
1da177e4
LT		 1782 goto out_nfserr;
1783 }
1784 }
81c3f413
BF		 1785 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1786 if (exp->ex_fslocs.locations == NULL) {
1787 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1788 }
1789 }
1da177e4
LT		 1790 if ((buflen -= 16) < 0)
1791 goto out_resource;
1792
1793 WRITE32(2);
1794 WRITE32(bmval0);
1795 WRITE32(bmval1);
1796 attrlenp = p++; /* to be backfilled later */
1797
1798 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
42ca0993 1799 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1da177e4
LT		 1800 if ((buflen -= 12) < 0)
1801 goto out_resource;
42ca0993
BF		 1802 if (!aclsupport)
1803 word0 &= ~FATTR4_WORD0_ACL;
1804 if (!exp->ex_fslocs.locations)
1805 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1da177e4 1806 WRITE32(2);
42ca0993 1807 WRITE32(word0);
1da177e4
LT		 1808 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1809 }
1810 if (bmval0 & FATTR4_WORD0_TYPE) {
1811 if ((buflen -= 4) < 0)
1812 goto out_resource;
1813 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1814 if (dummy == NF4BAD)
1815 goto out_serverfault;
1816 WRITE32(dummy);
1817 }
1818 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1819 if ((buflen -= 4) < 0)
1820 goto out_resource;
49640001 1821 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 1822 WRITE32(NFS4_FH_PERSISTENT);
49640001 1823 else
e34ac862 1824 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 1825 }
1826 if (bmval0 & FATTR4_WORD0_CHANGE) {
1827 /*
1828 * Note: This _must_ be consistent with the scheme for writing
1829 * change_info, so any changes made here must be reflected there
1830 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1831 * macro above.)
1832 */
1833 if ((buflen -= 8) < 0)
1834 goto out_resource;
1835 WRITE32(stat.ctime.tv_sec);
1836 WRITE32(stat.ctime.tv_nsec);
1837 }
1838 if (bmval0 & FATTR4_WORD0_SIZE) {
1839 if ((buflen -= 8) < 0)
1840 goto out_resource;
1841 WRITE64(stat.size);
1842 }
1843 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1844 if ((buflen -= 4) < 0)
1845 goto out_resource;
1846 WRITE32(1);
1847 }
1848 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1849 if ((buflen -= 4) < 0)
1850 goto out_resource;
1851 WRITE32(1);
1852 }
1853 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1854 if ((buflen -= 4) < 0)
1855 goto out_resource;
1856 WRITE32(0);
1857 }
1858 if (bmval0 & FATTR4_WORD0_FSID) {
1859 if ((buflen -= 16) < 0)
1860 goto out_resource;
42ca0993
BF		 1861 if (exp->ex_fslocs.migrated) {
1862 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1863 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 1864 } else switch(fsid_source(fhp)) {
1865 case FSIDSOURCE_FSID:
1da177e4
LT		 1866 WRITE64((u64)exp->ex_fsid);
1867 WRITE64((u64)0);
af6a4e28
N		 1868 break;
1869 case FSIDSOURCE_DEV:
1da177e4
LT		 1870 WRITE32(0);
1871 WRITE32(MAJOR(stat.dev));
1872 WRITE32(0);
1873 WRITE32(MINOR(stat.dev));
af6a4e28
N		 1874 break;
1875 case FSIDSOURCE_UUID:
1876 WRITEMEM(exp->ex_uuid, 16);
1877 break;
1da177e4
LT		 1878 }
1879 }
1880 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1881 if ((buflen -= 4) < 0)
1882 goto out_resource;
1883 WRITE32(0);
1884 }
1885 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1886 if ((buflen -= 4) < 0)
1887 goto out_resource;
1888 WRITE32(NFSD_LEASE_TIME);
1889 }
1890 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1891 if ((buflen -= 4) < 0)
1892 goto out_resource;
42ca0993 1893 WRITE32(rdattr_err);
1da177e4
LT		 1894 }
1895 if (bmval0 & FATTR4_WORD0_ACL) {
1896 struct nfs4_ace *ace;
1da177e4
LT		 1897
1898 if (acl == NULL) {
1899 if ((buflen -= 4) < 0)
1900 goto out_resource;
1901
1902 WRITE32(0);
1903 goto out_acl;
1904 }
1905 if ((buflen -= 4) < 0)
1906 goto out_resource;
1907 WRITE32(acl->naces);
1908
28e05dd8 1909 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 1910 if ((buflen -= 4*3) < 0)
1911 goto out_resource;
1912 WRITE32(ace->type);
1913 WRITE32(ace->flag);
1914 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1915 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1916 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1917 &p, &buflen);
1918 if (status == nfserr_resource)
1919 goto out_resource;
1920 if (status)
1921 goto out;
1922 }
1923 }
1924out_acl:
1925 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1926 if ((buflen -= 4) < 0)
1927 goto out_resource;
1928 WRITE32(aclsupport ?
1929 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1930 }
1931 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1932 if ((buflen -= 4) < 0)
1933 goto out_resource;
1934 WRITE32(1);
1935 }
1936 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1937 if ((buflen -= 4) < 0)
1938 goto out_resource;
1939 WRITE32(1);
1940 }
1941 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1942 if ((buflen -= 4) < 0)
1943 goto out_resource;
1944 WRITE32(1);
1945 }
1946 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1947 if ((buflen -= 4) < 0)
1948 goto out_resource;
1949 WRITE32(1);
1950 }
1951 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1952 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1953 if (buflen < 0)
1954 goto out_resource;
1955 WRITE32(fhp->fh_handle.fh_size);
1956 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1957 }
1958 if (bmval0 & FATTR4_WORD0_FILEID) {
1959 if ((buflen -= 8) < 0)
1960 goto out_resource;
40ee5dc6 1961 WRITE64(stat.ino);
1da177e4
LT		 1962 }
1963 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1964 if ((buflen -= 8) < 0)
1965 goto out_resource;
1966 WRITE64((u64) statfs.f_ffree);
1967 }
1968 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1969 if ((buflen -= 8) < 0)
1970 goto out_resource;
1971 WRITE64((u64) statfs.f_ffree);
1972 }
1973 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1974 if ((buflen -= 8) < 0)
1975 goto out_resource;
1976 WRITE64((u64) statfs.f_files);
1977 }
81c3f413
BF		 1978 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1979 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1980 if (status == nfserr_resource)
1981 goto out_resource;
1982 if (status)
1983 goto out;
1984 }
1da177e4
LT		 1985 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1986 if ((buflen -= 4) < 0)
1987 goto out_resource;
1988 WRITE32(1);
1989 }
1990 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1991 if ((buflen -= 8) < 0)
1992 goto out_resource;
1993 WRITE64(~(u64)0);
1994 }
1995 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1996 if ((buflen -= 4) < 0)
1997 goto out_resource;
1998 WRITE32(255);
1999 }
2000 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2001 if ((buflen -= 4) < 0)
2002 goto out_resource;
a16e92ed 2003 WRITE32(statfs.f_namelen);
1da177e4
LT		 2004 }
2005 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2006 if ((buflen -= 8) < 0)
2007 goto out_resource;
7adae489 2008 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2009 }
2010 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2011 if ((buflen -= 8) < 0)
2012 goto out_resource;
7adae489 2013 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2014 }
2015 if (bmval1 & FATTR4_WORD1_MODE) {
2016 if ((buflen -= 4) < 0)
2017 goto out_resource;
2018 WRITE32(stat.mode & S_IALLUGO);
2019 }
2020 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2021 if ((buflen -= 4) < 0)
2022 goto out_resource;
2023 WRITE32(1);
2024 }
2025 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2026 if ((buflen -= 4) < 0)
2027 goto out_resource;
2028 WRITE32(stat.nlink);
2029 }
2030 if (bmval1 & FATTR4_WORD1_OWNER) {
2031 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2032 if (status == nfserr_resource)
2033 goto out_resource;
2034 if (status)
2035 goto out;
2036 }
2037 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2038 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2039 if (status == nfserr_resource)
2040 goto out_resource;
2041 if (status)
2042 goto out;
2043 }
2044 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2045 if ((buflen -= 8) < 0)
2046 goto out_resource;
2047 WRITE32((u32) MAJOR(stat.rdev));
2048 WRITE32((u32) MINOR(stat.rdev));
2049 }
2050 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2051 if ((buflen -= 8) < 0)
2052 goto out_resource;
2053 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2054 WRITE64(dummy64);
2055 }
2056 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2057 if ((buflen -= 8) < 0)
2058 goto out_resource;
2059 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2060 WRITE64(dummy64);
2061 }
2062 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2063 if ((buflen -= 8) < 0)
2064 goto out_resource;
2065 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2066 WRITE64(dummy64);
2067 }
2068 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2069 if ((buflen -= 8) < 0)
2070 goto out_resource;
2071 dummy64 = (u64)stat.blocks << 9;
2072 WRITE64(dummy64);
2073 }
2074 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2075 if ((buflen -= 12) < 0)
2076 goto out_resource;
2077 WRITE32(0);
2078 WRITE32(stat.atime.tv_sec);
2079 WRITE32(stat.atime.tv_nsec);
2080 }
2081 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2082 if ((buflen -= 12) < 0)
2083 goto out_resource;
2084 WRITE32(0);
2085 WRITE32(1);
2086 WRITE32(0);
2087 }
2088 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2089 if ((buflen -= 12) < 0)
2090 goto out_resource;
2091 WRITE32(0);
2092 WRITE32(stat.ctime.tv_sec);
2093 WRITE32(stat.ctime.tv_nsec);
2094 }
2095 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2096 if ((buflen -= 12) < 0)
2097 goto out_resource;
2098 WRITE32(0);
2099 WRITE32(stat.mtime.tv_sec);
2100 WRITE32(stat.mtime.tv_nsec);
2101 }
2102 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 2103 if ((buflen -= 8) < 0)
2104 goto out_resource;
406a7ea9
FF		 2105 /*
2106 * Get parent's attributes if not ignoring crossmount
2107 * and this is the root of a cross-mounted filesystem.
2108 */
2109 if (ignore_crossmnt == 0 &&
54775491
JB		 2110 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
2111 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
2112 exp->ex_path.mnt->mnt_mountpoint, &stat);
40ee5dc6
PS		 2113 if (err)
2114 goto out_nfserr;
2115 }
2116 WRITE64(stat.ino);
1da177e4
LT		 2117 }
2118 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2119 *countp = p - buffer;
2120 status = nfs_ok;
2121
2122out:
28e05dd8 2123 kfree(acl);
1da177e4
LT		 2124 if (fhp == &tempfh)
2125 fh_put(&tempfh);
2126 return status;
2127out_nfserr:
b8dd7b9a 2128 status = nfserrno(err);
1da177e4
LT		 2129 goto out;
2130out_resource:
2131 *countp = 0;
2132 status = nfserr_resource;
2133 goto out;
2134out_serverfault:
2135 status = nfserr_serverfault;
2136 goto out;
2137}
2138
c0ce6ec8
BF		 2139static inline int attributes_need_mount(u32 *bmval)
2140{
2141 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2142 return 1;
2143 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2144 return 1;
2145 return 0;
2146}
2147
b37ad28b 2148static __be32
1da177e4 2149nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2ebbc012 2150 const char *name, int namlen, __be32 *p, int *buflen)
1da177e4
LT		 2151{
2152 struct svc_export *exp = cd->rd_fhp->fh_export;
2153 struct dentry *dentry;
b37ad28b 2154 __be32 nfserr;
406a7ea9 2155 int ignore_crossmnt = 0;
1da177e4
LT		 2156
2157 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2158 if (IS_ERR(dentry))
2159 return nfserrno(PTR_ERR(dentry));
2160
2161 exp_get(exp);
406a7ea9
FF		 2162 /*
2163 * In the case of a mountpoint, the client may be asking for
2164 * attributes that are only properties of the underlying filesystem
2165 * as opposed to the cross-mounted file system. In such a case,
2166 * we will not follow the cross mount and will fill the attribtutes
2167 * directly from the mountpoint dentry.
2168 */
c0ce6ec8 2169 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
406a7ea9
FF		 2170 ignore_crossmnt = 1;
2171 else if (d_mountpoint(dentry)) {
021d3a72
BF		 2172 int err;
2173
dcb488a3
AA		 2174 /*
2175 * Why the heck aren't we just using nfsd_lookup??
2176 * Different "."/".." handling? Something else?
2177 * At least, add a comment here to explain....
2178 */
021d3a72
BF		 2179 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2180 if (err) {
2181 nfserr = nfserrno(err);
1da177e4
LT		 2182 goto out_put;
2183 }
dcb488a3
AA		 2184 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2185 if (nfserr)
2186 goto out_put;
1da177e4
LT		 2187
2188 }
2189 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 2190 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2191out_put:
2192 dput(dentry);
2193 exp_put(exp);
2194 return nfserr;
2195}
2196
2ebbc012 2197static __be32 *
b37ad28b 2198nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2199{
2ebbc012 2200 __be32 *attrlenp;
1da177e4
LT		 2201
2202 if (buflen < 6)
2203 return NULL;
2204 *p++ = htonl(2);
2205 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2206 *p++ = htonl(0); /* bmval1 */
2207
2208 attrlenp = p++;
2209 *p++ = nfserr; /* no htonl */
2210 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2211 return p;
2212}
2213
2214static int
a0ad13ef
N		 2215nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2216 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2217{
a0ad13ef 2218 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2219 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2220 int buflen;
2ebbc012 2221 __be32 *p = cd->buffer;
b37ad28b 2222 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2223
2224 /* In nfsv4, "." and ".." never make it onto the wire.. */
2225 if (name && isdotent(name, namlen)) {
2226 cd->common.err = nfs_ok;
2227 return 0;
2228 }
2229
2230 if (cd->offset)
2231 xdr_encode_hyper(cd->offset, (u64) offset);
2232
2233 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2234 if (buflen < 0)
2235 goto fail;
2236
2237 *p++ = xdr_one; /* mark entry present */
2238 cd->offset = p; /* remember pointer */
2239 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2240 p = xdr_encode_array(p, name, namlen); /* name length & name */
2241
2242 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2243 switch (nfserr) {
2244 case nfs_ok:
2245 p += buflen;
2246 break;
2247 case nfserr_resource:
2248 nfserr = nfserr_toosmall;
2249 goto fail;
2250 case nfserr_dropit:
2251 goto fail;
2252 default:
2253 /*
2254 * If the client requested the RDATTR_ERROR attribute,
2255 * we stuff the error code into this attribute
2256 * and continue. If this attribute was not requested,
2257 * then in accordance with the spec, we fail the
2258 * entire READDIR operation(!)
2259 */
2260 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2261 goto fail;
1da177e4 2262 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2263 if (p == NULL) {
2264 nfserr = nfserr_toosmall;
1da177e4 2265 goto fail;
34081efc 2266 }
1da177e4
LT		 2267 }
2268 cd->buflen -= (p - cd->buffer);
2269 cd->buffer = p;
2270 cd->common.err = nfs_ok;
2271 return 0;
2272fail:
2273 cd->common.err = nfserr;
2274 return -EINVAL;
2275}
2276
e2f282b9
BH		 2277static void
2278nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2279{
2280 ENCODE_HEAD;
2281
2282 RESERVE_SPACE(sizeof(stateid_t));
2283 WRITE32(sid->si_generation);
2284 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2285 ADJUST_ARGS();
2286}
2287
695e12f8 2288static __be32
b37ad28b 2289nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4
LT		 2290{
2291 ENCODE_HEAD;
2292
2293 if (!nfserr) {
2294 RESERVE_SPACE(8);
2295 WRITE32(access->ac_supported);
2296 WRITE32(access->ac_resp_access);
2297 ADJUST_ARGS();
2298 }
695e12f8 2299 return nfserr;
1da177e4
LT		 2300}
2301
695e12f8 2302static __be32
b37ad28b 2303nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4
LT		 2304{
2305 ENCODE_SEQID_OP_HEAD;
2306
e2f282b9
BH		 2307 if (!nfserr)
2308 nfsd4_encode_stateid(resp, &close->cl_stateid);
2309
1da177e4 2310 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
695e12f8 2311 return nfserr;
1da177e4
LT		 2312}
2313
2314
695e12f8 2315static __be32
b37ad28b 2316nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4
LT		 2317{
2318 ENCODE_HEAD;
2319
2320 if (!nfserr) {
2321 RESERVE_SPACE(8);
2322 WRITEMEM(commit->co_verf.data, 8);
2323 ADJUST_ARGS();
2324 }
695e12f8 2325 return nfserr;
1da177e4
LT		 2326}
2327
695e12f8 2328static __be32
b37ad28b 2329nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4
LT		 2330{
2331 ENCODE_HEAD;
2332
2333 if (!nfserr) {
2334 RESERVE_SPACE(32);
2335 WRITECINFO(create->cr_cinfo);
2336 WRITE32(2);
2337 WRITE32(create->cr_bmval[0]);
2338 WRITE32(create->cr_bmval[1]);
2339 ADJUST_ARGS();
2340 }
695e12f8 2341 return nfserr;
1da177e4
LT		 2342}
2343
b37ad28b
AV		 2344static __be32
2345nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2346{
2347 struct svc_fh *fhp = getattr->ga_fhp;
2348 int buflen;
2349
2350 if (nfserr)
2351 return nfserr;
2352
2353 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2354 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2355 resp->p, &buflen, getattr->ga_bmval,
406a7ea9 2356 resp->rqstp, 0);
1da177e4
LT		 2357 if (!nfserr)
2358 resp->p += buflen;
2359 return nfserr;
2360}
2361
695e12f8
BH		 2362static __be32
2363nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2364{
695e12f8 2365 struct svc_fh *fhp = *fhpp;
1da177e4
LT		 2366 unsigned int len;
2367 ENCODE_HEAD;
2368
2369 if (!nfserr) {
2370 len = fhp->fh_handle.fh_size;
2371 RESERVE_SPACE(len + 4);
2372 WRITE32(len);
2373 WRITEMEM(&fhp->fh_handle.fh_base, len);
2374 ADJUST_ARGS();
2375 }
695e12f8 2376 return nfserr;
1da177e4
LT		 2377}
2378
2379/*
2380* Including all fields other than the name, a LOCK4denied structure requires
2381* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2382*/
2383static void
2384nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2385{
2386 ENCODE_HEAD;
2387
2388 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2389 WRITE64(ld->ld_start);
2390 WRITE64(ld->ld_length);
2391 WRITE32(ld->ld_type);
2392 if (ld->ld_sop) {
2393 WRITEMEM(&ld->ld_clientid, 8);
2394 WRITE32(ld->ld_sop->so_owner.len);
2395 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2396 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2397 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2398 WRITE64((u64)0); /* clientid */
2399 WRITE32(0); /* length of owner name */
2400 }
2401 ADJUST_ARGS();
2402}
2403
695e12f8 2404static __be32
b37ad28b 2405nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2406{
1da177e4
LT		 2407 ENCODE_SEQID_OP_HEAD;
2408
e2f282b9
BH		 2409 if (!nfserr)
2410 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2411 else if (nfserr == nfserr_denied)
1da177e4
LT		 2412 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2413
3a65588a 2414 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
695e12f8 2415 return nfserr;
1da177e4
LT		 2416}
2417
695e12f8 2418static __be32
b37ad28b 2419nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2420{
2421 if (nfserr == nfserr_denied)
2422 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2423 return nfserr;
1da177e4
LT		 2424}
2425
695e12f8 2426static __be32
b37ad28b 2427nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4
LT		 2428{
2429 ENCODE_SEQID_OP_HEAD;
2430
e2f282b9
BH		 2431 if (!nfserr)
2432 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2433
1da177e4 2434 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
695e12f8 2435 return nfserr;
1da177e4
LT		 2436}
2437
2438
695e12f8 2439static __be32
b37ad28b 2440nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4
LT		 2441{
2442 ENCODE_HEAD;
2443
2444 if (!nfserr) {
2445 RESERVE_SPACE(20);
2446 WRITECINFO(link->li_cinfo);
2447 ADJUST_ARGS();
2448 }
695e12f8 2449 return nfserr;
1da177e4
LT		 2450}
2451
2452
695e12f8 2453static __be32
b37ad28b 2454nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2455{
1b6b2257 2456 ENCODE_HEAD;
1da177e4
LT		 2457 ENCODE_SEQID_OP_HEAD;
2458
2459 if (nfserr)
2460 goto out;
2461
e2f282b9
BH		 2462 nfsd4_encode_stateid(resp, &open->op_stateid);
2463 RESERVE_SPACE(40);
1da177e4
LT		 2464 WRITECINFO(open->op_cinfo);
2465 WRITE32(open->op_rflags);
2466 WRITE32(2);
2467 WRITE32(open->op_bmval[0]);
2468 WRITE32(open->op_bmval[1]);
2469 WRITE32(open->op_delegate_type);
2470 ADJUST_ARGS();
2471
2472 switch (open->op_delegate_type) {
2473 case NFS4_OPEN_DELEGATE_NONE:
2474 break;
2475 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2476 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2477 RESERVE_SPACE(20);
7b190fec 2478 WRITE32(open->op_recall);
1da177e4
LT		 2479
2480 /*
2481 * TODO: ACE's in delegations
2482 */
2483 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2484 WRITE32(0);
2485 WRITE32(0);
2486 WRITE32(0); /* XXX: is NULL principal ok? */
2487 ADJUST_ARGS();
2488 break;
2489 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2490 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2491 RESERVE_SPACE(32);
1da177e4
LT		 2492 WRITE32(0);
2493
2494 /*
2495 * TODO: space_limit's in delegations
2496 */
2497 WRITE32(NFS4_LIMIT_SIZE);
2498 WRITE32(~(u32)0);
2499 WRITE32(~(u32)0);
2500
2501 /*
2502 * TODO: ACE's in delegations
2503 */
2504 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2505 WRITE32(0);
2506 WRITE32(0);
2507 WRITE32(0); /* XXX: is NULL principal ok? */
2508 ADJUST_ARGS();
2509 break;
2510 default:
2511 BUG();
2512 }
2513 /* XXX save filehandle here */
2514out:
2515 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
695e12f8 2516 return nfserr;
1da177e4
LT		 2517}
2518
695e12f8 2519static __be32
b37ad28b 2520nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4
LT		 2521{
2522 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2523
2524 if (!nfserr)
2525 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4
LT		 2526
2527 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
695e12f8 2528 return nfserr;
1da177e4
LT		 2529}
2530
695e12f8 2531static __be32
b37ad28b 2532nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4
LT		 2533{
2534 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2535
2536 if (!nfserr)
2537 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4
LT		 2538
2539 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
695e12f8 2540 return nfserr;
1da177e4
LT		 2541}
2542
b37ad28b
AV		 2543static __be32
2544nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2545 struct nfsd4_read *read)
1da177e4
LT		 2546{
2547 u32 eof;
2548 int v, pn;
2549 unsigned long maxcount;
2550 long len;
2551 ENCODE_HEAD;
2552
2553 if (nfserr)
2554 return nfserr;
2555 if (resp->xbuf->page_len)
2556 return nfserr_resource;
2557
2558 RESERVE_SPACE(8); /* eof flag and byte count */
2559
7adae489 2560 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2561 if (maxcount > read->rd_length)
2562 maxcount = read->rd_length;
2563
2564 len = maxcount;
2565 v = 0;
2566 while (len > 0) {
44524359 2567 pn = resp->rqstp->rq_resused++;
3cc03b16 2568 resp->rqstp->rq_vec[v].iov_base =
44524359 2569 page_address(resp->rqstp->rq_respages[pn]);
3cc03b16 2570 resp->rqstp->rq_vec[v].iov_len =
44524359 2571 len < PAGE_SIZE ? len : PAGE_SIZE;
1da177e4
LT		 2572 v++;
2573 len -= PAGE_SIZE;
2574 }
2575 read->rd_vlen = v;
2576
2577 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2578 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2579 &maxcount);
2580
2581 if (nfserr == nfserr_symlink)
2582 nfserr = nfserr_inval;
2583 if (nfserr)
2584 return nfserr;
44524359
N		 2585 eof = (read->rd_offset + maxcount >=
2586 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2587
2588 WRITE32(eof);
2589 WRITE32(maxcount);
2590 ADJUST_ARGS();
6ed6decc
N		 2591 resp->xbuf->head[0].iov_len = (char*)p
2592 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2593 resp->xbuf->page_len = maxcount;
2594
6ed6decc 2595 /* Use rest of head for padding and remaining ops: */
6ed6decc 2596 resp->xbuf->tail[0].iov_base = p;
1da177e4 2597 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2598 if (maxcount&3) {
6ed6decc
N		 2599 RESERVE_SPACE(4);
2600 WRITE32(0);
1da177e4
LT		 2601 resp->xbuf->tail[0].iov_base += maxcount&3;
2602 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2603 ADJUST_ARGS();
1da177e4
LT		 2604 }
2605 return 0;
2606}
2607
b37ad28b
AV		 2608static __be32
2609nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 2610{
2611 int maxcount;
2612 char *page;
2613 ENCODE_HEAD;
2614
2615 if (nfserr)
2616 return nfserr;
2617 if (resp->xbuf->page_len)
2618 return nfserr_resource;
2619
44524359 2620 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2621
2622 maxcount = PAGE_SIZE;
2623 RESERVE_SPACE(4);
2624
2625 /*
2626 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2627 * if they would overflow the buffer. Is this kosher in NFSv4? If
2628 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2629 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2630 */
2631 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2632 if (nfserr == nfserr_isdir)
2633 return nfserr_inval;
2634 if (nfserr)
2635 return nfserr;
2636
2637 WRITE32(maxcount);
2638 ADJUST_ARGS();
6ed6decc
N		 2639 resp->xbuf->head[0].iov_len = (char*)p
2640 - (char*)resp->xbuf->head[0].iov_base;
2641 resp->xbuf->page_len = maxcount;
1da177e4 2642
6ed6decc 2643 /* Use rest of head for padding and remaining ops: */
6ed6decc 2644 resp->xbuf->tail[0].iov_base = p;
1da177e4 2645 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2646 if (maxcount&3) {
6ed6decc
N		 2647 RESERVE_SPACE(4);
2648 WRITE32(0);
1da177e4
LT		 2649 resp->xbuf->tail[0].iov_base += maxcount&3;
2650 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2651 ADJUST_ARGS();
1da177e4
LT		 2652 }
2653 return 0;
2654}
2655
b37ad28b
AV		 2656static __be32
2657nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 2658{
2659 int maxcount;
2660 loff_t offset;
2ebbc012 2661 __be32 *page, *savep, *tailbase;
1da177e4
LT		 2662 ENCODE_HEAD;
2663
2664 if (nfserr)
2665 return nfserr;
2666 if (resp->xbuf->page_len)
2667 return nfserr_resource;
2668
2669 RESERVE_SPACE(8); /* verifier */
2670 savep = p;
2671
2672 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2673 WRITE32(0);
2674 WRITE32(0);
2675 ADJUST_ARGS();
2676 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 2677 tailbase = p;
1da177e4
LT		 2678
2679 maxcount = PAGE_SIZE;
2680 if (maxcount > readdir->rd_maxcount)
2681 maxcount = readdir->rd_maxcount;
2682
2683 /*
2684 * Convert from bytes to words, account for the two words already
2685 * written, make sure to leave two words at the end for the next
2686 * pointer and eof field.
2687 */
2688 maxcount = (maxcount >> 2) - 4;
2689 if (maxcount < 0) {
2690 nfserr = nfserr_toosmall;
2691 goto err_no_verf;
2692 }
2693
44524359 2694 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2695 readdir->common.err = 0;
2696 readdir->buflen = maxcount;
2697 readdir->buffer = page;
2698 readdir->offset = NULL;
2699
2700 offset = readdir->rd_cookie;
2701 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2702 &offset,
2703 &readdir->common, nfsd4_encode_dirent);
2704 if (nfserr == nfs_ok &&
2705 readdir->common.err == nfserr_toosmall &&
2706 readdir->buffer == page)
2707 nfserr = nfserr_toosmall;
2708 if (nfserr == nfserr_symlink)
2709 nfserr = nfserr_notdir;
2710 if (nfserr)
2711 goto err_no_verf;
2712
2713 if (readdir->offset)
2714 xdr_encode_hyper(readdir->offset, offset);
2715
2716 p = readdir->buffer;
2717 *p++ = 0; /* no more entries */
2718 *p++ = htonl(readdir->common.err == nfserr_eof);
44524359
N		 2719 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2720 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
1da177e4 2721
bb6e8a9f 2722 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 2723 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 2724 resp->xbuf->tail[0].iov_len = 0;
2725 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 2726 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 2727
2728 return 0;
2729err_no_verf:
2730 p = savep;
2731 ADJUST_ARGS();
2732 return nfserr;
2733}
2734
695e12f8 2735static __be32
b37ad28b 2736nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4
LT		 2737{
2738 ENCODE_HEAD;
2739
2740 if (!nfserr) {
2741 RESERVE_SPACE(20);
2742 WRITECINFO(remove->rm_cinfo);
2743 ADJUST_ARGS();
2744 }
695e12f8 2745 return nfserr;
1da177e4
LT		 2746}
2747
695e12f8 2748static __be32
b37ad28b 2749nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4
LT		 2750{
2751 ENCODE_HEAD;
2752
2753 if (!nfserr) {
2754 RESERVE_SPACE(40);
2755 WRITECINFO(rename->rn_sinfo);
2756 WRITECINFO(rename->rn_tinfo);
2757 ADJUST_ARGS();
2758 }
695e12f8 2759 return nfserr;
1da177e4
LT		 2760}
2761
695e12f8 2762static __be32
ca5c8cde 2763nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
dcb488a3
AA		 2764 struct nfsd4_secinfo *secinfo)
2765{
2766 int i = 0;
2767 struct svc_export *exp = secinfo->si_exp;
4796f457
BF		 2768 u32 nflavs;
2769 struct exp_flavor_info *flavs;
2770 struct exp_flavor_info def_flavs[2];
dcb488a3
AA		 2771 ENCODE_HEAD;
2772
2773 if (nfserr)
2774 goto out;
4796f457
BF		 2775 if (exp->ex_nflavors) {
2776 flavs = exp->ex_flavors;
2777 nflavs = exp->ex_nflavors;
2778 } else { /* Handling of some defaults in absence of real secinfo: */
2779 flavs = def_flavs;
2780 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2781 nflavs = 2;
2782 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2783 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2784 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2785 nflavs = 1;
2786 flavs[0].pseudoflavor
2787 = svcauth_gss_flavor(exp->ex_client);
2788 } else {
2789 nflavs = 1;
2790 flavs[0].pseudoflavor
2791 = exp->ex_client->flavour->flavour;
2792 }
2793 }
2794
dcb488a3 2795 RESERVE_SPACE(4);
4796f457 2796 WRITE32(nflavs);
dcb488a3 2797 ADJUST_ARGS();
4796f457
BF		 2798 for (i = 0; i < nflavs; i++) {
2799 u32 flav = flavs[i].pseudoflavor;
dcb488a3
AA		 2800 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2801
2802 if (gm) {
2803 RESERVE_SPACE(4);
2804 WRITE32(RPC_AUTH_GSS);
2805 ADJUST_ARGS();
2806 RESERVE_SPACE(4 + gm->gm_oid.len);
2807 WRITE32(gm->gm_oid.len);
2808 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2809 ADJUST_ARGS();
2810 RESERVE_SPACE(4);
2811 WRITE32(0); /* qop */
2812 ADJUST_ARGS();
2813 RESERVE_SPACE(4);
2814 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2815 ADJUST_ARGS();
2816 gss_mech_put(gm);
2817 } else {
2818 RESERVE_SPACE(4);
2819 WRITE32(flav);
2820 ADJUST_ARGS();
2821 }
2822 }
2823out:
2824 if (exp)
2825 exp_put(exp);
695e12f8 2826 return nfserr;
dcb488a3
AA		 2827}
2828
1da177e4
LT		 2829/*
2830 * The SETATTR encode routine is special -- it always encodes a bitmap,
2831 * regardless of the error status.
2832 */
695e12f8 2833static __be32
b37ad28b 2834nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4
LT		 2835{
2836 ENCODE_HEAD;
2837
2838 RESERVE_SPACE(12);
2839 if (nfserr) {
2840 WRITE32(2);
2841 WRITE32(0);
2842 WRITE32(0);
2843 }
2844 else {
2845 WRITE32(2);
2846 WRITE32(setattr->sa_bmval[0]);
2847 WRITE32(setattr->sa_bmval[1]);
2848 }
2849 ADJUST_ARGS();
695e12f8 2850 return nfserr;
1da177e4
LT		 2851}
2852
695e12f8 2853static __be32
b37ad28b 2854nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4
LT		 2855{
2856 ENCODE_HEAD;
2857
2858 if (!nfserr) {
2859 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2860 WRITEMEM(&scd->se_clientid, 8);
2861 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2862 ADJUST_ARGS();
2863 }
2864 else if (nfserr == nfserr_clid_inuse) {
2865 RESERVE_SPACE(8);
2866 WRITE32(0);
2867 WRITE32(0);
2868 ADJUST_ARGS();
2869 }
695e12f8 2870 return nfserr;
1da177e4
LT		 2871}
2872
695e12f8 2873static __be32
b37ad28b 2874nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4
LT		 2875{
2876 ENCODE_HEAD;
2877
2878 if (!nfserr) {
2879 RESERVE_SPACE(16);
2880 WRITE32(write->wr_bytes_written);
2881 WRITE32(write->wr_how_written);
2882 WRITEMEM(write->wr_verifier.data, 8);
2883 ADJUST_ARGS();
2884 }
695e12f8 2885 return nfserr;
1da177e4
LT		 2886}
2887
2db134eb
AA		 2888static __be32
2889nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2890 struct nfsd4_exchange_id *exid)
2891{
0733d213
AA		 2892 ENCODE_HEAD;
2893 char *major_id;
2894 char *server_scope;
2895 int major_id_sz;
2896 int server_scope_sz;
2897 uint64_t minor_id = 0;
2898
2899 if (nfserr)
2900 return nfserr;
2901
2902 major_id = utsname()->nodename;
2903 major_id_sz = strlen(major_id);
2904 server_scope = utsname()->nodename;
2905 server_scope_sz = strlen(server_scope);
2906
2907 RESERVE_SPACE(
2908 8 /* eir_clientid */ +
2909 4 /* eir_sequenceid */ +
2910 4 /* eir_flags */ +
2911 4 /* spr_how (SP4_NONE) */ +
2912 8 /* so_minor_id */ +
2913 4 /* so_major_id.len */ +
2914 (XDR_QUADLEN(major_id_sz) * 4) +
2915 4 /* eir_server_scope.len */ +
2916 (XDR_QUADLEN(server_scope_sz) * 4) +
2917 4 /* eir_server_impl_id.count (0) */);
2918
2919 WRITEMEM(&exid->clientid, 8);
2920 WRITE32(exid->seqid);
2921 WRITE32(exid->flags);
2922
2923 /* state_protect4_r. Currently only support SP4_NONE */
2924 BUG_ON(exid->spa_how != SP4_NONE);
2925 WRITE32(exid->spa_how);
2926
2927 /* The server_owner struct */
2928 WRITE64(minor_id); /* Minor id */
2929 /* major id */
2930 WRITE32(major_id_sz);
2931 WRITEMEM(major_id, major_id_sz);
2932
2933 /* Server scope */
2934 WRITE32(server_scope_sz);
2935 WRITEMEM(server_scope, server_scope_sz);
2936
2937 /* Implementation id */
2938 WRITE32(0); /* zero length nfs_impl_id4 array */
2939 ADJUST_ARGS();
2940 return 0;
2db134eb
AA		 2941}
2942
2943static __be32
2944nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
2945 struct nfsd4_create_session *sess)
2946{
ec6b5d7b
AA		 2947 ENCODE_HEAD;
2948
2949 if (nfserr)
2950 return nfserr;
2951
2952 RESERVE_SPACE(24);
2953 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2954 WRITE32(sess->seqid);
2955 WRITE32(sess->flags);
2956 ADJUST_ARGS();
2957
2958 RESERVE_SPACE(28);
2959 WRITE32(0); /* headerpadsz */
2960 WRITE32(sess->fore_channel.maxreq_sz);
2961 WRITE32(sess->fore_channel.maxresp_sz);
2962 WRITE32(sess->fore_channel.maxresp_cached);
2963 WRITE32(sess->fore_channel.maxops);
2964 WRITE32(sess->fore_channel.maxreqs);
2965 WRITE32(sess->fore_channel.nr_rdma_attrs);
2966 ADJUST_ARGS();
2967
2968 if (sess->fore_channel.nr_rdma_attrs) {
2969 RESERVE_SPACE(4);
2970 WRITE32(sess->fore_channel.rdma_attrs);
2971 ADJUST_ARGS();
2972 }
2973
2974 RESERVE_SPACE(28);
2975 WRITE32(0); /* headerpadsz */
2976 WRITE32(sess->back_channel.maxreq_sz);
2977 WRITE32(sess->back_channel.maxresp_sz);
2978 WRITE32(sess->back_channel.maxresp_cached);
2979 WRITE32(sess->back_channel.maxops);
2980 WRITE32(sess->back_channel.maxreqs);
2981 WRITE32(sess->back_channel.nr_rdma_attrs);
2982 ADJUST_ARGS();
2983
2984 if (sess->back_channel.nr_rdma_attrs) {
2985 RESERVE_SPACE(4);
2986 WRITE32(sess->back_channel.rdma_attrs);
2987 ADJUST_ARGS();
2988 }
2989 return 0;
2db134eb
AA		 2990}
2991
2992static __be32
2993nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
2994 struct nfsd4_destroy_session *destroy_session)
2995{
2db134eb
AA		 2996 return nfserr;
2997}
2998
bf864a31 2999__be32
2db134eb
AA		 3000nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3001 struct nfsd4_sequence *seq)
3002{
b85d4c01
BH		 3003 ENCODE_HEAD;
3004
3005 if (nfserr)
3006 return nfserr;
3007
3008 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3009 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3010 WRITE32(seq->seqid);
3011 WRITE32(seq->slotid);
3012 WRITE32(seq->maxslots);
3013 /*
3014 * FIXME: for now:
3015 * target_maxslots = maxslots
3016 * status_flags = 0
3017 */
3018 WRITE32(seq->maxslots);
3019 WRITE32(0);
3020
3021 ADJUST_ARGS();
3022 return 0;
2db134eb
AA		 3023}
3024
695e12f8
BH		 3025static __be32
3026nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3027{
3028 return nfserr;
3029}
3030
3031typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3032
2db134eb
AA		 3033/*
3034 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3035 * since we don't need to filter out obsolete ops as this is
3036 * done in the decoding phase.
3037 */
695e12f8 3038static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3039 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3040 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3041 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3042 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3043 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3044 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3045 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3046 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3047 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3048 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3049 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3050 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3051 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3052 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3053 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3054 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3055 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3056 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3057 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3058 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3059 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3060 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3061 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3062 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3063 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3064 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3065 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3066 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3067 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3068 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3069 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3070 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3071 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3072 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3073 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3074 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3075 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3076
3077 /* NFSv4.1 operations */
3078 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3079 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3080 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3081 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3082 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3083 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3084 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3085 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3086 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3087 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3088 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3089 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3090 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
3091 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3092 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3093 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3094 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3095 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3096 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3097};
3098
496c262c
AA		 3099/*
3100 * Calculate the total amount of memory that the compound response has taken
3101 * after encoding the current operation.
3102 *
3103 * pad: add on 8 bytes for the next operation's op_code and status so that
3104 * there is room to cache a failure on the next operation.
3105 *
3106 * Compare this length to the session se_fmaxresp_cached.
3107 *
3108 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3109 * will be at least a page and will therefore hold the xdr_buf head.
3110 */
3111static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3112{
3113 int status = 0;
3114 struct xdr_buf *xb = &resp->rqstp->rq_res;
3115 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3116 struct nfsd4_session *session = NULL;
3117 struct nfsd4_slot *slot = resp->cstate.slot;
3118 u32 length, tlen = 0, pad = 8;
3119
3120 if (!nfsd4_has_session(&resp->cstate))
3121 return status;
3122
3123 session = resp->cstate.session;
3124 if (session == NULL || slot->sl_cache_entry.ce_cachethis == 0)
3125 return status;
3126
3127 if (resp->opcnt >= args->opcnt)
3128 pad = 0; /* this is the last operation */
3129
3130 if (xb->page_len == 0) {
3131 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3132 } else {
3133 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3134 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3135
3136 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3137 }
3138 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3139 length, xb->page_len, tlen, pad);
3140
3141 if (length <= session->se_fmaxresp_cached)
3142 return status;
3143 else
3144 return nfserr_rep_too_big_to_cache;
3145}
3146
1da177e4
LT		 3147void
3148nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3149{
2ebbc012 3150 __be32 *statp;
1da177e4
LT		 3151 ENCODE_HEAD;
3152
3153 RESERVE_SPACE(8);
3154 WRITE32(op->opnum);
3155 statp = p++; /* to be backfilled at the end */
3156 ADJUST_ARGS();
3157
695e12f8
BH		 3158 if (op->opnum == OP_ILLEGAL)
3159 goto status;
3160 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3161 !nfsd4_enc_ops[op->opnum]);
3162 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
496c262c
AA		 3163 /* nfsd4_check_drc_limit guarantees enough room for error status */
3164 if (!op->status && nfsd4_check_drc_limit(resp))
3165 op->status = nfserr_rep_too_big_to_cache;
695e12f8 3166status:
1da177e4
LT		 3167 /*
3168 * Note: We write the status directly, instead of using WRITE32(),
3169 * since it is already in network byte order.
3170 */
3171 *statp = op->status;
3172}
3173
3174/*
3175 * Encode the reply stored in the stateowner reply cache
3176 *
3177 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3178 * previously sent already encoded operation.
3179 *
3180 * called with nfs4_lock_state() held
3181 */
3182void
3183nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3184{
3185 ENCODE_HEAD;
3186 struct nfs4_replay *rp = op->replay;
3187
3188 BUG_ON(!rp);
3189
3190 RESERVE_SPACE(8);
3191 WRITE32(op->opnum);
3192 *p++ = rp->rp_status; /* already xdr'ed */
3193 ADJUST_ARGS();
3194
3195 RESERVE_SPACE(rp->rp_buflen);
3196 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3197 ADJUST_ARGS();
3198}
3199
3200/*
3201 * END OF "GENERIC" ENCODE ROUTINES.
3202 */
3203
3204int
2ebbc012 3205nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3206{
3207 return xdr_ressize_check(rqstp, p);
3208}
3209
3210void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3211{
3212 if (args->ops != args->iops) {
3213 kfree(args->ops);
3214 args->ops = args->iops;
3215 }
f99d49ad
JJ		 3216 kfree(args->tmpp);
3217 args->tmpp = NULL;
1da177e4
LT		 3218 while (args->to_free) {
3219 struct tmpbuf *tb = args->to_free;
3220 args->to_free = tb->next;
3221 tb->release(tb->buf);
3222 kfree(tb);
3223 }
3224}
3225
3226int
2ebbc012 3227nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3228{
b37ad28b 3229 __be32 status;
1da177e4
LT		 3230
3231 args->p = p;
3232 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3233 args->pagelist = rqstp->rq_arg.pages;
3234 args->pagelen = rqstp->rq_arg.page_len;
3235 args->tmpp = NULL;
3236 args->to_free = NULL;
3237 args->ops = args->iops;
3238 args->rqstp = rqstp;
3239
3240 status = nfsd4_decode_compound(args);
3241 if (status) {
3242 nfsd4_release_compoundargs(args);
3243 }
3244 return !status;
3245}
3246
3247int
2ebbc012 3248nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3249{
3250 /*
3251 * All that remains is to write the tag and operation count...
3252 */
3253 struct kvec *iov;
3254 p = resp->tagp;
3255 *p++ = htonl(resp->taglen);
3256 memcpy(p, resp->tag, resp->taglen);
3257 p += XDR_QUADLEN(resp->taglen);
3258 *p++ = htonl(resp->opcnt);
3259
3260 if (rqstp->rq_res.page_len)
3261 iov = &rqstp->rq_res.tail[0];
3262 else
3263 iov = &rqstp->rq_res.head[0];
3264 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3265 BUG_ON(iov->iov_len > PAGE_SIZE);
6668958f 3266 if (nfsd4_has_session(&resp->cstate)) {
bf864a31
AA		 3267 if (resp->cstate.status == nfserr_replay_cache &&
3268 !nfsd4_not_cached(resp)) {
da3846a2
AA		 3269 iov->iov_len = resp->cstate.iovlen;
3270 } else {
3271 nfsd4_store_cache_entry(resp);
3272 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3273 resp->cstate.slot->sl_inuse = 0;
3274 }
3275 if (resp->cstate.session)
3276 nfsd4_put_session(resp->cstate.session);
3277 }
1da177e4
LT		 3278 return 1;
3279}
3280
3281/*
3282 * Local variables:
3283 * c-basic-offset: 8
3284 * End:
3285 */
kernel source for telekom puls (alcatel/mediatek)