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nfsd: clean up mnt_want_write calls
[deliverable/linux.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4xdr.c
3 *
4 * Server-side XDR for NFSv4
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * TODO: Neil Brown made the following observation: We currently
38 * initially reserve NFSD_BUFSIZE space on the transmit queue and
39 * never release any of that until the request is complete.
40 * It would be good to calculate a new maximum response size while
41 * decoding the COMPOUND, and call svc_reserve with this number
42 * at the end of nfs4svc_decode_compoundargs.
43 */
44
45#include <linux/param.h>
46#include <linux/smp.h>
1da177e4
LT		 47#include <linux/fs.h>
48#include <linux/namei.h>
49#include <linux/vfs.h>
50#include <linux/sunrpc/xdr.h>
51#include <linux/sunrpc/svc.h>
52#include <linux/sunrpc/clnt.h>
53#include <linux/nfsd/nfsd.h>
54#include <linux/nfsd/state.h>
55#include <linux/nfsd/xdr4.h>
56#include <linux/nfsd_idmap.h>
57#include <linux/nfs4.h>
58#include <linux/nfs4_acl.h>
dcb488a3 59#include <linux/sunrpc/gss_api.h>
4796f457 60#include <linux/sunrpc/svcauth_gss.h>
1da177e4
LT		 61
62#define NFSDDBG_FACILITY NFSDDBG_XDR
63
42ca0993
BF		 64/*
65 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
66 * directory in order to indicate to the client that a filesystem boundary is present
67 * We use a fixed fsid for a referral
68 */
69#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
70#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
71
b37ad28b
AV		 72static __be32
73check_filename(char *str, int len, __be32 err)
1da177e4
LT		 74{
75 int i;
76
77 if (len == 0)
78 return nfserr_inval;
79 if (isdotent(str, len))
80 return err;
81 for (i = 0; i < len; i++)
82 if (str[i] == '/')
83 return err;
84 return 0;
85}
86
87/*
88 * START OF "GENERIC" DECODE ROUTINES.
89 * These may look a little ugly since they are imported from a "generic"
90 * set of XDR encode/decode routines which are intended to be shared by
91 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
92 *
93 * If the pain of reading these is too great, it should be a straightforward
94 * task to translate them into Linux-specific versions which are more
95 * consistent with the style used in NFSv2/v3...
96 */
97#define DECODE_HEAD \
2ebbc012 98 __be32 *p; \
b37ad28b 99 __be32 status
1da177e4
LT		 100#define DECODE_TAIL \
101 status = 0; \
102out: \
103 return status; \
104xdr_error: \
817cb9d4
CL		 105 dprintk("NFSD: xdr error (%s:%d)\n", \
106 __FILE__, __LINE__); \
1da177e4
LT		 107 status = nfserr_bad_xdr; \
108 goto out
109
110#define READ32(x) (x) = ntohl(*p++)
111#define READ64(x) do { \
112 (x) = (u64)ntohl(*p++) << 32; \
113 (x) |= ntohl(*p++); \
114} while (0)
115#define READTIME(x) do { \
116 p++; \
117 (x) = ntohl(*p++); \
118 p++; \
119} while (0)
120#define READMEM(x,nbytes) do { \
121 x = (char *)p; \
122 p += XDR_QUADLEN(nbytes); \
123} while (0)
124#define SAVEMEM(x,nbytes) do { \
125 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
126 savemem(argp, p, nbytes) : \
127 (char *)p)) { \
817cb9d4
CL		 128 dprintk("NFSD: xdr error (%s:%d)\n", \
129 __FILE__, __LINE__); \
1da177e4
LT		 130 goto xdr_error; \
131 } \
132 p += XDR_QUADLEN(nbytes); \
133} while (0)
134#define COPYMEM(x,nbytes) do { \
135 memcpy((x), p, nbytes); \
136 p += XDR_QUADLEN(nbytes); \
137} while (0)
138
139/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
140#define READ_BUF(nbytes) do { \
141 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
142 p = argp->p; \
143 argp->p += XDR_QUADLEN(nbytes); \
144 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 145 dprintk("NFSD: xdr error (%s:%d)\n", \
146 __FILE__, __LINE__); \
1da177e4
LT		 147 goto xdr_error; \
148 } \
149} while (0)
150
ca2a05aa 151static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 152{
153 /* We want more bytes than seem to be available.
154 * Maybe we need a new page, maybe we have just run out
155 */
ca2a05aa 156 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 157 __be32 *p;
1da177e4
LT		 158 if (avail + argp->pagelen < nbytes)
159 return NULL;
160 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
161 return NULL;
162 /* ok, we can do it with the current plus the next page */
163 if (nbytes <= sizeof(argp->tmp))
164 p = argp->tmp;
165 else {
f99d49ad 166 kfree(argp->tmpp);
1da177e4
LT		 167 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
168 if (!p)
169 return NULL;
170
171 }
ca2a05aa
BF		 172 /*
173 * The following memcpy is safe because read_buf is always
174 * called with nbytes > avail, and the two cases above both
175 * guarantee p points to at least nbytes bytes.
176 */
1da177e4
LT		 177 memcpy(p, argp->p, avail);
178 /* step to next page */
179 argp->p = page_address(argp->pagelist[0]);
180 argp->pagelist++;
181 if (argp->pagelen < PAGE_SIZE) {
182 argp->end = p + (argp->pagelen>>2);
183 argp->pagelen = 0;
184 } else {
185 argp->end = p + (PAGE_SIZE>>2);
186 argp->pagelen -= PAGE_SIZE;
187 }
188 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
189 argp->p += XDR_QUADLEN(nbytes - avail);
190 return p;
191}
192
193static int
194defer_free(struct nfsd4_compoundargs *argp,
195 void (*release)(const void *), void *p)
196{
197 struct tmpbuf *tb;
198
199 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
200 if (!tb)
201 return -ENOMEM;
202 tb->buf = p;
203 tb->release = release;
204 tb->next = argp->to_free;
205 argp->to_free = tb;
206 return 0;
207}
208
2ebbc012 209static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 210{
1da177e4 211 if (p == argp->tmp) {
a4db5fe5
BF		 212 p = kmalloc(nbytes, GFP_KERNEL);
213 if (!p)
214 return NULL;
1da177e4
LT		 215 memcpy(p, argp->tmp, nbytes);
216 } else {
73dff8be 217 BUG_ON(p != argp->tmpp);
1da177e4
LT		 218 argp->tmpp = NULL;
219 }
220 if (defer_free(argp, kfree, p)) {
a4db5fe5 221 kfree(p);
1da177e4
LT		 222 return NULL;
223 } else
224 return (char *)p;
225}
226
b37ad28b 227static __be32
1da177e4
LT		 228nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
229{
230 u32 bmlen;
231 DECODE_HEAD;
232
233 bmval[0] = 0;
234 bmval[1] = 0;
235
236 READ_BUF(4);
237 READ32(bmlen);
238 if (bmlen > 1000)
239 goto xdr_error;
240
241 READ_BUF(bmlen << 2);
242 if (bmlen > 0)
243 READ32(bmval[0]);
244 if (bmlen > 1)
245 READ32(bmval[1]);
246
247 DECODE_TAIL;
248}
249
b37ad28b 250static __be32
1da177e4
LT		 251nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
252 struct nfs4_acl **acl)
253{
254 int expected_len, len = 0;
255 u32 dummy32;
256 char *buf;
b8dd7b9a 257 int host_err;
1da177e4
LT		 258
259 DECODE_HEAD;
260 iattr->ia_valid = 0;
261 if ((status = nfsd4_decode_bitmap(argp, bmval)))
262 return status;
263
264 /*
f34f9242 265 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP;
1da177e4
LT		 266 * read-only attributes return ERR_INVAL.
267 */
268 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
269 return nfserr_attrnotsupp;
270 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
271 return nfserr_inval;
272
273 READ_BUF(4);
274 READ32(expected_len);
275
276 if (bmval[0] & FATTR4_WORD0_SIZE) {
277 READ_BUF(8);
278 len += 8;
279 READ64(iattr->ia_size);
280 iattr->ia_valid |= ATTR_SIZE;
281 }
282 if (bmval[0] & FATTR4_WORD0_ACL) {
28e05dd8
BF		 283 int nace;
284 struct nfs4_ace *ace;
1da177e4
LT		 285
286 READ_BUF(4); len += 4;
287 READ32(nace);
288
28e05dd8
BF		 289 if (nace > NFS4_ACL_MAX)
290 return nfserr_resource;
291
292 *acl = nfs4_acl_new(nace);
1da177e4 293 if (*acl == NULL) {
b8dd7b9a 294 host_err = -ENOMEM;
1da177e4
LT		 295 goto out_nfserr;
296 }
28e05dd8 297 defer_free(argp, kfree, *acl);
1da177e4 298
28e05dd8
BF		 299 (*acl)->naces = nace;
300 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 301 READ_BUF(16); len += 16;
28e05dd8
BF		 302 READ32(ace->type);
303 READ32(ace->flag);
304 READ32(ace->access_mask);
1da177e4
LT		 305 READ32(dummy32);
306 READ_BUF(dummy32);
307 len += XDR_QUADLEN(dummy32) << 2;
308 READMEM(buf, dummy32);
28e05dd8 309 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
b8dd7b9a 310 host_err = 0;
28e05dd8
BF		 311 if (ace->whotype != NFS4_ACL_WHO_NAMED)
312 ace->who = 0;
313 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
b8dd7b9a 314 host_err = nfsd_map_name_to_gid(argp->rqstp,
28e05dd8 315 buf, dummy32, &ace->who);
1da177e4 316 else
b8dd7b9a 317 host_err = nfsd_map_name_to_uid(argp->rqstp,
28e05dd8 318 buf, dummy32, &ace->who);
b8dd7b9a 319 if (host_err)
1da177e4 320 goto out_nfserr;
1da177e4
LT		 321 }
322 } else
323 *acl = NULL;
324 if (bmval[1] & FATTR4_WORD1_MODE) {
325 READ_BUF(4);
326 len += 4;
327 READ32(iattr->ia_mode);
328 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
329 iattr->ia_valid |= ATTR_MODE;
330 }
331 if (bmval[1] & FATTR4_WORD1_OWNER) {
332 READ_BUF(4);
333 len += 4;
334 READ32(dummy32);
335 READ_BUF(dummy32);
336 len += (XDR_QUADLEN(dummy32) << 2);
337 READMEM(buf, dummy32);
b8dd7b9a 338 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
1da177e4
LT		 339 goto out_nfserr;
340 iattr->ia_valid |= ATTR_UID;
341 }
342 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
343 READ_BUF(4);
344 len += 4;
345 READ32(dummy32);
346 READ_BUF(dummy32);
347 len += (XDR_QUADLEN(dummy32) << 2);
348 READMEM(buf, dummy32);
b8dd7b9a 349 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
1da177e4
LT		 350 goto out_nfserr;
351 iattr->ia_valid |= ATTR_GID;
352 }
353 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
354 READ_BUF(4);
355 len += 4;
356 READ32(dummy32);
357 switch (dummy32) {
358 case NFS4_SET_TO_CLIENT_TIME:
359 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
360 all 32 bits of 'nseconds'. */
361 READ_BUF(12);
362 len += 12;
363 READ32(dummy32);
364 if (dummy32)
365 return nfserr_inval;
366 READ32(iattr->ia_atime.tv_sec);
367 READ32(iattr->ia_atime.tv_nsec);
368 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
369 return nfserr_inval;
370 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
371 break;
372 case NFS4_SET_TO_SERVER_TIME:
373 iattr->ia_valid |= ATTR_ATIME;
374 break;
375 default:
376 goto xdr_error;
377 }
378 }
1da177e4
LT		 379 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
380 READ_BUF(4);
381 len += 4;
382 READ32(dummy32);
383 switch (dummy32) {
384 case NFS4_SET_TO_CLIENT_TIME:
385 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
386 all 32 bits of 'nseconds'. */
387 READ_BUF(12);
388 len += 12;
389 READ32(dummy32);
390 if (dummy32)
391 return nfserr_inval;
392 READ32(iattr->ia_mtime.tv_sec);
393 READ32(iattr->ia_mtime.tv_nsec);
394 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
395 return nfserr_inval;
396 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
397 break;
398 case NFS4_SET_TO_SERVER_TIME:
399 iattr->ia_valid |= ATTR_MTIME;
400 break;
401 default:
402 goto xdr_error;
403 }
404 }
405 if (len != expected_len)
406 goto xdr_error;
407
408 DECODE_TAIL;
409
410out_nfserr:
b8dd7b9a 411 status = nfserrno(host_err);
1da177e4
LT		 412 goto out;
413}
414
b37ad28b 415static __be32
1da177e4
LT		 416nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
417{
418 DECODE_HEAD;
419
420 READ_BUF(4);
421 READ32(access->ac_req_access);
422
423 DECODE_TAIL;
424}
425
b37ad28b 426static __be32
1da177e4
LT		 427nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
428{
429 DECODE_HEAD;
430
431 close->cl_stateowner = NULL;
432 READ_BUF(4 + sizeof(stateid_t));
433 READ32(close->cl_seqid);
434 READ32(close->cl_stateid.si_generation);
435 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
436
437 DECODE_TAIL;
438}
439
440
b37ad28b 441static __be32
1da177e4
LT		 442nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
443{
444 DECODE_HEAD;
445
446 READ_BUF(12);
447 READ64(commit->co_offset);
448 READ32(commit->co_count);
449
450 DECODE_TAIL;
451}
452
b37ad28b 453static __be32
1da177e4
LT		 454nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
455{
456 DECODE_HEAD;
457
458 READ_BUF(4);
459 READ32(create->cr_type);
460 switch (create->cr_type) {
461 case NF4LNK:
462 READ_BUF(4);
463 READ32(create->cr_linklen);
464 READ_BUF(create->cr_linklen);
465 SAVEMEM(create->cr_linkname, create->cr_linklen);
466 break;
467 case NF4BLK:
468 case NF4CHR:
469 READ_BUF(8);
470 READ32(create->cr_specdata1);
471 READ32(create->cr_specdata2);
472 break;
473 case NF4SOCK:
474 case NF4FIFO:
475 case NF4DIR:
476 default:
477 break;
478 }
479
480 READ_BUF(4);
481 READ32(create->cr_namelen);
482 READ_BUF(create->cr_namelen);
483 SAVEMEM(create->cr_name, create->cr_namelen);
484 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
485 return status;
486
487 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
488 goto out;
489
490 DECODE_TAIL;
491}
492
b37ad28b 493static inline __be32
1da177e4
LT		 494nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
495{
496 DECODE_HEAD;
497
498 READ_BUF(sizeof(stateid_t));
499 READ32(dr->dr_stateid.si_generation);
500 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t));
501
502 DECODE_TAIL;
503}
504
b37ad28b 505static inline __be32
1da177e4
LT		 506nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
507{
508 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
509}
510
b37ad28b 511static __be32
1da177e4
LT		 512nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
513{
514 DECODE_HEAD;
515
516 READ_BUF(4);
517 READ32(link->li_namelen);
518 READ_BUF(link->li_namelen);
519 SAVEMEM(link->li_name, link->li_namelen);
520 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
521 return status;
522
523 DECODE_TAIL;
524}
525
b37ad28b 526static __be32
1da177e4
LT		 527nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
528{
529 DECODE_HEAD;
530
3a65588a 531 lock->lk_replay_owner = NULL;
1da177e4
LT		 532 /*
533 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
534 */
535 READ_BUF(28);
536 READ32(lock->lk_type);
537 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
538 goto xdr_error;
539 READ32(lock->lk_reclaim);
540 READ64(lock->lk_offset);
541 READ64(lock->lk_length);
542 READ32(lock->lk_is_new);
543
544 if (lock->lk_is_new) {
545 READ_BUF(36);
546 READ32(lock->lk_new_open_seqid);
547 READ32(lock->lk_new_open_stateid.si_generation);
548
549 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
550 READ32(lock->lk_new_lock_seqid);
551 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
552 READ32(lock->lk_new_owner.len);
553 READ_BUF(lock->lk_new_owner.len);
554 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
555 } else {
556 READ_BUF(20);
557 READ32(lock->lk_old_lock_stateid.si_generation);
558 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
559 READ32(lock->lk_old_lock_seqid);
560 }
561
562 DECODE_TAIL;
563}
564
b37ad28b 565static __be32
1da177e4
LT		 566nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
567{
568 DECODE_HEAD;
569
570 READ_BUF(32);
571 READ32(lockt->lt_type);
572 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
573 goto xdr_error;
574 READ64(lockt->lt_offset);
575 READ64(lockt->lt_length);
576 COPYMEM(&lockt->lt_clientid, 8);
577 READ32(lockt->lt_owner.len);
578 READ_BUF(lockt->lt_owner.len);
579 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
580
581 DECODE_TAIL;
582}
583
b37ad28b 584static __be32
1da177e4
LT		 585nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
586{
587 DECODE_HEAD;
588
589 locku->lu_stateowner = NULL;
590 READ_BUF(24 + sizeof(stateid_t));
591 READ32(locku->lu_type);
592 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
593 goto xdr_error;
594 READ32(locku->lu_seqid);
595 READ32(locku->lu_stateid.si_generation);
596 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
597 READ64(locku->lu_offset);
598 READ64(locku->lu_length);
599
600 DECODE_TAIL;
601}
602
b37ad28b 603static __be32
1da177e4
LT		 604nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
605{
606 DECODE_HEAD;
607
608 READ_BUF(4);
609 READ32(lookup->lo_len);
610 READ_BUF(lookup->lo_len);
611 SAVEMEM(lookup->lo_name, lookup->lo_len);
612 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
613 return status;
614
615 DECODE_TAIL;
616}
617
b37ad28b 618static __be32
1da177e4
LT		 619nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
620{
621 DECODE_HEAD;
622
623 memset(open->op_bmval, 0, sizeof(open->op_bmval));
624 open->op_iattr.ia_valid = 0;
625 open->op_stateowner = NULL;
626
627 /* seqid, share_access, share_deny, clientid, ownerlen */
628 READ_BUF(16 + sizeof(clientid_t));
629 READ32(open->op_seqid);
630 READ32(open->op_share_access);
631 READ32(open->op_share_deny);
632 COPYMEM(&open->op_clientid, sizeof(clientid_t));
633 READ32(open->op_owner.len);
634
635 /* owner, open_flag */
636 READ_BUF(open->op_owner.len + 4);
637 SAVEMEM(open->op_owner.data, open->op_owner.len);
638 READ32(open->op_create);
639 switch (open->op_create) {
640 case NFS4_OPEN_NOCREATE:
641 break;
642 case NFS4_OPEN_CREATE:
643 READ_BUF(4);
644 READ32(open->op_createmode);
645 switch (open->op_createmode) {
646 case NFS4_CREATE_UNCHECKED:
647 case NFS4_CREATE_GUARDED:
648 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
649 goto out;
650 break;
651 case NFS4_CREATE_EXCLUSIVE:
652 READ_BUF(8);
653 COPYMEM(open->op_verf.data, 8);
654 break;
655 default:
656 goto xdr_error;
657 }
658 break;
659 default:
660 goto xdr_error;
661 }
662
663 /* open_claim */
664 READ_BUF(4);
665 READ32(open->op_claim_type);
666 switch (open->op_claim_type) {
667 case NFS4_OPEN_CLAIM_NULL:
668 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
669 READ_BUF(4);
670 READ32(open->op_fname.len);
671 READ_BUF(open->op_fname.len);
672 SAVEMEM(open->op_fname.data, open->op_fname.len);
673 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
674 return status;
675 break;
676 case NFS4_OPEN_CLAIM_PREVIOUS:
677 READ_BUF(4);
678 READ32(open->op_delegate_type);
679 break;
680 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
681 READ_BUF(sizeof(stateid_t) + 4);
682 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t));
683 READ32(open->op_fname.len);
684 READ_BUF(open->op_fname.len);
685 SAVEMEM(open->op_fname.data, open->op_fname.len);
686 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
687 return status;
688 break;
689 default:
690 goto xdr_error;
691 }
692
693 DECODE_TAIL;
694}
695
b37ad28b 696static __be32
1da177e4
LT		 697nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
698{
699 DECODE_HEAD;
700
701 open_conf->oc_stateowner = NULL;
702 READ_BUF(4 + sizeof(stateid_t));
703 READ32(open_conf->oc_req_stateid.si_generation);
704 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
705 READ32(open_conf->oc_seqid);
706
707 DECODE_TAIL;
708}
709
b37ad28b 710static __be32
1da177e4
LT		 711nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
712{
713 DECODE_HEAD;
714
715 open_down->od_stateowner = NULL;
716 READ_BUF(12 + sizeof(stateid_t));
717 READ32(open_down->od_stateid.si_generation);
718 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
719 READ32(open_down->od_seqid);
720 READ32(open_down->od_share_access);
721 READ32(open_down->od_share_deny);
722
723 DECODE_TAIL;
724}
725
b37ad28b 726static __be32
1da177e4
LT		 727nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
728{
729 DECODE_HEAD;
730
731 READ_BUF(4);
732 READ32(putfh->pf_fhlen);
733 if (putfh->pf_fhlen > NFS4_FHSIZE)
734 goto xdr_error;
735 READ_BUF(putfh->pf_fhlen);
736 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
737
738 DECODE_TAIL;
739}
740
b37ad28b 741static __be32
1da177e4
LT		 742nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
743{
744 DECODE_HEAD;
745
746 READ_BUF(sizeof(stateid_t) + 12);
747 READ32(read->rd_stateid.si_generation);
748 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
749 READ64(read->rd_offset);
750 READ32(read->rd_length);
751
752 DECODE_TAIL;
753}
754
b37ad28b 755static __be32
1da177e4
LT		 756nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
757{
758 DECODE_HEAD;
759
760 READ_BUF(24);
761 READ64(readdir->rd_cookie);
762 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
763 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
764 READ32(readdir->rd_maxcount);
765 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
766 goto out;
767
768 DECODE_TAIL;
769}
770
b37ad28b 771static __be32
1da177e4
LT		 772nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
773{
774 DECODE_HEAD;
775
776 READ_BUF(4);
777 READ32(remove->rm_namelen);
778 READ_BUF(remove->rm_namelen);
779 SAVEMEM(remove->rm_name, remove->rm_namelen);
780 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
781 return status;
782
783 DECODE_TAIL;
784}
785
b37ad28b 786static __be32
1da177e4
LT		 787nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
788{
789 DECODE_HEAD;
790
791 READ_BUF(4);
792 READ32(rename->rn_snamelen);
793 READ_BUF(rename->rn_snamelen + 4);
794 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
795 READ32(rename->rn_tnamelen);
796 READ_BUF(rename->rn_tnamelen);
797 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
798 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
799 return status;
800 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
801 return status;
802
803 DECODE_TAIL;
804}
805
b37ad28b 806static __be32
1da177e4
LT		 807nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
808{
809 DECODE_HEAD;
810
811 READ_BUF(sizeof(clientid_t));
812 COPYMEM(clientid, sizeof(clientid_t));
813
814 DECODE_TAIL;
815}
816
dcb488a3
AA		 817static __be32
818nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
819 struct nfsd4_secinfo *secinfo)
820{
821 DECODE_HEAD;
822
823 READ_BUF(4);
824 READ32(secinfo->si_namelen);
825 READ_BUF(secinfo->si_namelen);
826 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
827 status = check_filename(secinfo->si_name, secinfo->si_namelen,
828 nfserr_noent);
829 if (status)
830 return status;
831 DECODE_TAIL;
832}
833
b37ad28b 834static __be32
1da177e4
LT		 835nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
836{
837 DECODE_HEAD;
838
839 READ_BUF(sizeof(stateid_t));
840 READ32(setattr->sa_stateid.si_generation);
841 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
842 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
843 goto out;
844
845 DECODE_TAIL;
846}
847
b37ad28b 848static __be32
1da177e4
LT		 849nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
850{
851 DECODE_HEAD;
852
853 READ_BUF(12);
854 COPYMEM(setclientid->se_verf.data, 8);
855 READ32(setclientid->se_namelen);
856
857 READ_BUF(setclientid->se_namelen + 8);
858 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
859 READ32(setclientid->se_callback_prog);
860 READ32(setclientid->se_callback_netid_len);
861
862 READ_BUF(setclientid->se_callback_netid_len + 4);
863 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
864 READ32(setclientid->se_callback_addr_len);
865
866 READ_BUF(setclientid->se_callback_addr_len + 4);
867 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
868 READ32(setclientid->se_callback_ident);
869
870 DECODE_TAIL;
871}
872
b37ad28b 873static __be32
1da177e4
LT		 874nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
875{
876 DECODE_HEAD;
877
878 READ_BUF(8 + sizeof(nfs4_verifier));
879 COPYMEM(&scd_c->sc_clientid, 8);
880 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
881
882 DECODE_TAIL;
883}
884
885/* Also used for NVERIFY */
b37ad28b 886static __be32
1da177e4
LT		 887nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
888{
889#if 0
890 struct nfsd4_compoundargs save = {
891 .p = argp->p,
892 .end = argp->end,
893 .rqstp = argp->rqstp,
894 };
895 u32 ve_bmval[2];
896 struct iattr ve_iattr; /* request */
897 struct nfs4_acl *ve_acl; /* request */
898#endif
899 DECODE_HEAD;
900
901 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
902 goto out;
903
904 /* For convenience's sake, we compare raw xdr'd attributes in
905 * nfsd4_proc_verify; however we still decode here just to return
906 * correct error in case of bad xdr. */
907#if 0
908 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
909 if (status == nfserr_inval) {
910 status = nfserrno(status);
911 goto out;
912 }
913#endif
914 READ_BUF(4);
915 READ32(verify->ve_attrlen);
916 READ_BUF(verify->ve_attrlen);
917 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
918
919 DECODE_TAIL;
920}
921
b37ad28b 922static __be32
1da177e4
LT		 923nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
924{
925 int avail;
926 int v;
927 int len;
928 DECODE_HEAD;
929
930 READ_BUF(sizeof(stateid_opaque_t) + 20);
931 READ32(write->wr_stateid.si_generation);
932 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
933 READ64(write->wr_offset);
934 READ32(write->wr_stable_how);
935 if (write->wr_stable_how > 2)
936 goto xdr_error;
937 READ32(write->wr_buflen);
938
939 /* Sorry .. no magic macros for this.. *
940 * READ_BUF(write->wr_buflen);
941 * SAVEMEM(write->wr_buf, write->wr_buflen);
942 */
943 avail = (char*)argp->end - (char*)argp->p;
944 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 945 dprintk("NFSD: xdr error (%s:%d)\n",
946 __FILE__, __LINE__);
1da177e4
LT		 947 goto xdr_error;
948 }
3cc03b16
N		 949 argp->rqstp->rq_vec[0].iov_base = p;
950 argp->rqstp->rq_vec[0].iov_len = avail;
1da177e4
LT		 951 v = 0;
952 len = write->wr_buflen;
3cc03b16
N		 953 while (len > argp->rqstp->rq_vec[v].iov_len) {
954 len -= argp->rqstp->rq_vec[v].iov_len;
1da177e4 955 v++;
3cc03b16 956 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1da177e4
LT		 957 argp->pagelist++;
958 if (argp->pagelen >= PAGE_SIZE) {
3cc03b16 959 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1da177e4
LT		 960 argp->pagelen -= PAGE_SIZE;
961 } else {
3cc03b16 962 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1da177e4
LT		 963 argp->pagelen -= len;
964 }
965 }
2ebbc012
AV		 966 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
967 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
3cc03b16 968 argp->rqstp->rq_vec[v].iov_len = len;
1da177e4
LT		 969 write->wr_vlen = v+1;
970
971 DECODE_TAIL;
972}
973
b37ad28b 974static __be32
1da177e4
LT		 975nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
976{
977 DECODE_HEAD;
978
979 READ_BUF(12);
980 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
981 READ32(rlockowner->rl_owner.len);
982 READ_BUF(rlockowner->rl_owner.len);
983 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
984
985 DECODE_TAIL;
986}
987
b37ad28b 988static __be32
1da177e4
LT		 989nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
990{
991 DECODE_HEAD;
992 struct nfsd4_op *op;
993 int i;
994
995 /*
996 * XXX: According to spec, we should check the tag
997 * for UTF-8 compliance. I'm postponing this for
998 * now because it seems that some clients do use
999 * binary tags.
1000 */
1001 READ_BUF(4);
1002 READ32(argp->taglen);
1003 READ_BUF(argp->taglen + 8);
1004 SAVEMEM(argp->tag, argp->taglen);
1005 READ32(argp->minorversion);
1006 READ32(argp->opcnt);
1007
1008 if (argp->taglen > NFSD4_MAX_TAGLEN)
1009 goto xdr_error;
1010 if (argp->opcnt > 100)
1011 goto xdr_error;
1012
e8c96f8c 1013 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1014 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1015 if (!argp->ops) {
1016 argp->ops = argp->iops;
817cb9d4 1017 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1018 goto xdr_error;
1019 }
1020 }
1021
1022 for (i = 0; i < argp->opcnt; i++) {
1023 op = &argp->ops[i];
1024 op->replay = NULL;
1025
1026 /*
1027 * We can't use READ_BUF() here because we need to handle
1028 * a missing opcode as an OP_WRITE + 1. So we need to check
1029 * to see if we're truly at the end of our buffer or if there
1030 * is another page we need to flip to.
1031 */
1032
1033 if (argp->p == argp->end) {
1034 if (argp->pagelen < 4) {
1035 /* There isn't an opcode still on the wire */
1036 op->opnum = OP_WRITE + 1;
1037 op->status = nfserr_bad_xdr;
1038 argp->opcnt = i+1;
1039 break;
1040 }
1041
1042 /*
1043 * False alarm. We just hit a page boundary, but there
1044 * is still data available. Move pointer across page
1045 * boundary. *snip from READ_BUF*
1046 */
1047 argp->p = page_address(argp->pagelist[0]);
1048 argp->pagelist++;
1049 if (argp->pagelen < PAGE_SIZE) {
1050 argp->end = p + (argp->pagelen>>2);
1051 argp->pagelen = 0;
1052 } else {
1053 argp->end = p + (PAGE_SIZE>>2);
1054 argp->pagelen -= PAGE_SIZE;
1055 }
1056 }
1057 op->opnum = ntohl(*argp->p++);
1058
1059 switch (op->opnum) {
1060 case 2: /* Reserved operation */
1061 op->opnum = OP_ILLEGAL;
1062 if (argp->minorversion == 0)
1063 op->status = nfserr_op_illegal;
1064 else
1065 op->status = nfserr_minor_vers_mismatch;
1066 break;
1067 case OP_ACCESS:
1068 op->status = nfsd4_decode_access(argp, &op->u.access);
1069 break;
1070 case OP_CLOSE:
1071 op->status = nfsd4_decode_close(argp, &op->u.close);
1072 break;
1073 case OP_COMMIT:
1074 op->status = nfsd4_decode_commit(argp, &op->u.commit);
1075 break;
1076 case OP_CREATE:
1077 op->status = nfsd4_decode_create(argp, &op->u.create);
1078 break;
1079 case OP_DELEGRETURN:
1080 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn);
1081 break;
1082 case OP_GETATTR:
1083 op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1084 break;
1085 case OP_GETFH:
1086 op->status = nfs_ok;
1087 break;
1088 case OP_LINK:
1089 op->status = nfsd4_decode_link(argp, &op->u.link);
1090 break;
1091 case OP_LOCK:
1092 op->status = nfsd4_decode_lock(argp, &op->u.lock);
1093 break;
1094 case OP_LOCKT:
1095 op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1096 break;
1097 case OP_LOCKU:
1098 op->status = nfsd4_decode_locku(argp, &op->u.locku);
1099 break;
1100 case OP_LOOKUP:
1101 op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1102 break;
1103 case OP_LOOKUPP:
1104 op->status = nfs_ok;
1105 break;
1106 case OP_NVERIFY:
1107 op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1108 break;
1109 case OP_OPEN:
1110 op->status = nfsd4_decode_open(argp, &op->u.open);
1111 break;
1112 case OP_OPEN_CONFIRM:
1113 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1114 break;
1115 case OP_OPEN_DOWNGRADE:
1116 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1117 break;
1118 case OP_PUTFH:
1119 op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1120 break;
1121 case OP_PUTROOTFH:
1122 op->status = nfs_ok;
1123 break;
1124 case OP_READ:
1125 op->status = nfsd4_decode_read(argp, &op->u.read);
1126 break;
1127 case OP_READDIR:
1128 op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1129 break;
1130 case OP_READLINK:
1131 op->status = nfs_ok;
1132 break;
1133 case OP_REMOVE:
1134 op->status = nfsd4_decode_remove(argp, &op->u.remove);
1135 break;
1136 case OP_RENAME:
1137 op->status = nfsd4_decode_rename(argp, &op->u.rename);
1138 break;
1139 case OP_RESTOREFH:
1140 op->status = nfs_ok;
1141 break;
1142 case OP_RENEW:
1143 op->status = nfsd4_decode_renew(argp, &op->u.renew);
1144 break;
1145 case OP_SAVEFH:
1146 op->status = nfs_ok;
1147 break;
dcb488a3
AA		 1148 case OP_SECINFO:
1149 op->status = nfsd4_decode_secinfo(argp, &op->u.secinfo);
1150 break;
1da177e4
LT		 1151 case OP_SETATTR:
1152 op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1153 break;
1154 case OP_SETCLIENTID:
1155 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1156 break;
1157 case OP_SETCLIENTID_CONFIRM:
1158 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1159 break;
1160 case OP_VERIFY:
1161 op->status = nfsd4_decode_verify(argp, &op->u.verify);
1162 break;
1163 case OP_WRITE:
1164 op->status = nfsd4_decode_write(argp, &op->u.write);
1165 break;
1166 case OP_RELEASE_LOCKOWNER:
1167 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1168 break;
1169 default:
1170 op->opnum = OP_ILLEGAL;
1171 op->status = nfserr_op_illegal;
1172 break;
1173 }
1174
1175 if (op->status) {
1176 argp->opcnt = i+1;
1177 break;
1178 }
1179 }
1180
1181 DECODE_TAIL;
1182}
1183/*
1184 * END OF "GENERIC" DECODE ROUTINES.
1185 */
1186
1187/*
1188 * START OF "GENERIC" ENCODE ROUTINES.
1189 * These may look a little ugly since they are imported from a "generic"
1190 * set of XDR encode/decode routines which are intended to be shared by
1191 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1192 *
1193 * If the pain of reading these is too great, it should be a straightforward
1194 * task to translate them into Linux-specific versions which are more
1195 * consistent with the style used in NFSv2/v3...
1196 */
2ebbc012 1197#define ENCODE_HEAD __be32 *p
1da177e4
LT		 1198
1199#define WRITE32(n) *p++ = htonl(n)
1200#define WRITE64(n) do { \
1201 *p++ = htonl((u32)((n) >> 32)); \
1202 *p++ = htonl((u32)(n)); \
1203} while (0)
13b1867c 1204#define WRITEMEM(ptr,nbytes) do if (nbytes > 0) { \
1da177e4
LT		 1205 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1206 memcpy(p, ptr, nbytes); \
1207 p += XDR_QUADLEN(nbytes); \
1208} while (0)
1209#define WRITECINFO(c) do { \
1210 *p++ = htonl(c.atomic); \
1211 *p++ = htonl(c.before_ctime_sec); \
1212 *p++ = htonl(c.before_ctime_nsec); \
1213 *p++ = htonl(c.after_ctime_sec); \
1214 *p++ = htonl(c.after_ctime_nsec); \
1215} while (0)
1216
1217#define RESERVE_SPACE(nbytes) do { \
1218 p = resp->p; \
1219 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1220} while (0)
1221#define ADJUST_ARGS() resp->p = p
1222
1223/*
1224 * Header routine to setup seqid operation replay cache
1225 */
1226#define ENCODE_SEQID_OP_HEAD \
2ebbc012
AV		 1227 __be32 *p; \
1228 __be32 *save; \
1da177e4
LT		 1229 \
1230 save = resp->p;
1231
1232/*
7fb64cee
N		 1233 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1234 * is where sequence id's are incremented, and the replay cache is filled.
1235 * Note that we increment sequence id's here, at the last moment, so we're sure
1236 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1237 */
1238
1239#define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1240 if (seqid_mutating_err(nfserr) && stateowner) { \
bd9aac52 1241 stateowner->so_seqid++; \
1da177e4
LT		 1242 stateowner->so_replay.rp_status = nfserr; \
1243 stateowner->so_replay.rp_buflen = \
1244 (((char *)(resp)->p - (char *)save)); \
1245 memcpy(stateowner->so_replay.rp_buf, save, \
1246 stateowner->so_replay.rp_buflen); \
1247 } } while (0);
1248
81c3f413
BF		 1249/* Encode as an array of strings the string given with components
1250 * seperated @sep.
1251 */
b37ad28b 1252static __be32 nfsd4_encode_components(char sep, char *components,
2ebbc012 1253 __be32 **pp, int *buflen)
81c3f413 1254{
2ebbc012
AV		 1255 __be32 *p = *pp;
1256 __be32 *countp = p;
81c3f413
BF		 1257 int strlen, count=0;
1258 char *str, *end;
1259
1260 dprintk("nfsd4_encode_components(%s)\n", components);
1261 if ((*buflen -= 4) < 0)
1262 return nfserr_resource;
1263 WRITE32(0); /* We will fill this in with @count later */
1264 end = str = components;
1265 while (*end) {
1266 for (; *end && (*end != sep); end++)
1267 ; /* Point to end of component */
1268 strlen = end - str;
1269 if (strlen) {
1270 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1271 return nfserr_resource;
1272 WRITE32(strlen);
1273 WRITEMEM(str, strlen);
1274 count++;
1275 }
1276 else
1277 end++;
1278 str = end;
1279 }
1280 *pp = p;
1281 p = countp;
1282 WRITE32(count);
1283 return 0;
1284}
1285
1286/*
1287 * encode a location element of a fs_locations structure
1288 */
b37ad28b 1289static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1290 __be32 **pp, int *buflen)
81c3f413 1291{
b37ad28b 1292 __be32 status;
2ebbc012 1293 __be32 *p = *pp;
81c3f413
BF		 1294
1295 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1296 if (status)
1297 return status;
1298 status = nfsd4_encode_components('/', location->path, &p, buflen);
1299 if (status)
1300 return status;
1301 *pp = p;
1302 return 0;
1303}
1304
1305/*
1306 * Return the path to an export point in the pseudo filesystem namespace
1307 * Returned string is safe to use as long as the caller holds a reference
1308 * to @exp.
1309 */
b37ad28b 1310static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
81c3f413
BF		 1311{
1312 struct svc_fh tmp_fh;
1313 char *path, *rootpath;
81c3f413
BF		 1314
1315 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb 1316 *stat = exp_pseudoroot(rqstp, &tmp_fh);
cc45f017
AV		 1317 if (*stat)
1318 return NULL;
54775491 1319 rootpath = tmp_fh.fh_export->ex_pathname;
81c3f413 1320
54775491 1321 path = exp->ex_pathname;
81c3f413
BF		 1322
1323 if (strncmp(path, rootpath, strlen(rootpath))) {
817cb9d4 1324 dprintk("nfsd: fs_locations failed;"
81c3f413 1325 "%s is not contained in %s\n", path, rootpath);
cc45f017
AV		 1326 *stat = nfserr_notsupp;
1327 return NULL;
81c3f413
BF		 1328 }
1329
1330 return path + strlen(rootpath);
1331}
1332
1333/*
1334 * encode a fs_locations structure
1335 */
b37ad28b 1336static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1337 struct svc_export *exp,
2ebbc012 1338 __be32 **pp, int *buflen)
81c3f413 1339{
b37ad28b 1340 __be32 status;
cc45f017 1341 int i;
2ebbc012 1342 __be32 *p = *pp;
81c3f413 1343 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
cc45f017 1344 char *root = nfsd4_path(rqstp, exp, &status);
81c3f413 1345
cc45f017
AV		 1346 if (status)
1347 return status;
81c3f413
BF		 1348 status = nfsd4_encode_components('/', root, &p, buflen);
1349 if (status)
1350 return status;
1351 if ((*buflen -= 4) < 0)
1352 return nfserr_resource;
1353 WRITE32(fslocs->locations_count);
1354 for (i=0; i<fslocs->locations_count; i++) {
1355 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1356 &p, buflen);
1357 if (status)
1358 return status;
1359 }
1360 *pp = p;
1361 return 0;
1362}
1da177e4
LT		 1363
1364static u32 nfs4_ftypes[16] = {
1365 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1366 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1367 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1368 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1369};
1370
b37ad28b 1371static __be32
1da177e4 1372nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1373 __be32 **p, int *buflen)
1da177e4
LT		 1374{
1375 int status;
1376
1377 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1378 return nfserr_resource;
1379 if (whotype != NFS4_ACL_WHO_NAMED)
1380 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1381 else if (group)
1382 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1383 else
1384 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1385 if (status < 0)
1386 return nfserrno(status);
1387 *p = xdr_encode_opaque(*p, NULL, status);
1388 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1389 BUG_ON(*buflen < 0);
1390 return 0;
1391}
1392
b37ad28b 1393static inline __be32
2ebbc012 1394nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1da177e4
LT		 1395{
1396 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1397}
1398
b37ad28b 1399static inline __be32
2ebbc012 1400nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1da177e4
LT		 1401{
1402 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1403}
1404
b37ad28b 1405static inline __be32
1da177e4 1406nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1407 __be32 **p, int *buflen)
1da177e4
LT		 1408{
1409 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1410}
1411
42ca0993
BF		 1412#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1413 FATTR4_WORD0_RDATTR_ERROR)
1414#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1415
b37ad28b 1416static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1417{
1418 /* As per referral draft: */
1419 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1420 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1421 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1422 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1423 *rdattr_err = NFSERR_MOVED;
1424 else
1425 return nfserr_moved;
1426 }
1427 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1428 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1429 return 0;
1430}
1da177e4
LT		 1431
1432/*
1433 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1434 * ourselves.
1435 *
1436 * @countp is the buffer size in _words_; upon successful return this becomes
1437 * replaced with the number of words written.
1438 */
b37ad28b 1439__be32
1da177e4 1440nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2ebbc012 1441 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
406a7ea9 1442 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 1443{
1444 u32 bmval0 = bmval[0];
1445 u32 bmval1 = bmval[1];
1446 struct kstat stat;
1447 struct svc_fh tempfh;
1448 struct kstatfs statfs;
1449 int buflen = *countp << 2;
2ebbc012 1450 __be32 *attrlenp;
1da177e4
LT		 1451 u32 dummy;
1452 u64 dummy64;
42ca0993 1453 u32 rdattr_err = 0;
2ebbc012 1454 __be32 *p = buffer;
b37ad28b 1455 __be32 status;
b8dd7b9a 1456 int err;
1da177e4
LT		 1457 int aclsupport = 0;
1458 struct nfs4_acl *acl = NULL;
1459
1460 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1461 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1462 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1463
42ca0993
BF		 1464 if (exp->ex_fslocs.migrated) {
1465 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1466 if (status)
1467 goto out;
1468 }
1469
54775491 1470 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
b8dd7b9a 1471 if (err)
1da177e4 1472 goto out_nfserr;
a16e92ed
BF		 1473 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1474 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 1475 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1476 FATTR4_WORD1_SPACE_TOTAL))) {
b8dd7b9a
AV		 1477 err = vfs_statfs(dentry, &statfs);
1478 if (err)
1da177e4
LT		 1479 goto out_nfserr;
1480 }
1481 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1482 fh_init(&tempfh, NFS4_FHSIZE);
1483 status = fh_compose(&tempfh, exp, dentry, NULL);
1484 if (status)
1485 goto out;
1486 fhp = &tempfh;
1487 }
1488 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1489 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 1490 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1491 aclsupport = (err == 0);
1da177e4 1492 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 1493 if (err == -EOPNOTSUPP)
1da177e4 1494 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 1495 else if (err == -EINVAL) {
1da177e4
LT		 1496 status = nfserr_attrnotsupp;
1497 goto out;
b8dd7b9a 1498 } else if (err != 0)
1da177e4
LT		 1499 goto out_nfserr;
1500 }
1501 }
81c3f413
BF		 1502 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1503 if (exp->ex_fslocs.locations == NULL) {
1504 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1505 }
1506 }
1da177e4
LT		 1507 if ((buflen -= 16) < 0)
1508 goto out_resource;
1509
1510 WRITE32(2);
1511 WRITE32(bmval0);
1512 WRITE32(bmval1);
1513 attrlenp = p++; /* to be backfilled later */
1514
1515 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
42ca0993 1516 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1da177e4
LT		 1517 if ((buflen -= 12) < 0)
1518 goto out_resource;
42ca0993
BF		 1519 if (!aclsupport)
1520 word0 &= ~FATTR4_WORD0_ACL;
1521 if (!exp->ex_fslocs.locations)
1522 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1da177e4 1523 WRITE32(2);
42ca0993 1524 WRITE32(word0);
1da177e4
LT		 1525 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1526 }
1527 if (bmval0 & FATTR4_WORD0_TYPE) {
1528 if ((buflen -= 4) < 0)
1529 goto out_resource;
1530 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1531 if (dummy == NF4BAD)
1532 goto out_serverfault;
1533 WRITE32(dummy);
1534 }
1535 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1536 if ((buflen -= 4) < 0)
1537 goto out_resource;
49640001 1538 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 1539 WRITE32(NFS4_FH_PERSISTENT);
49640001 1540 else
e34ac862 1541 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 1542 }
1543 if (bmval0 & FATTR4_WORD0_CHANGE) {
1544 /*
1545 * Note: This _must_ be consistent with the scheme for writing
1546 * change_info, so any changes made here must be reflected there
1547 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1548 * macro above.)
1549 */
1550 if ((buflen -= 8) < 0)
1551 goto out_resource;
1552 WRITE32(stat.ctime.tv_sec);
1553 WRITE32(stat.ctime.tv_nsec);
1554 }
1555 if (bmval0 & FATTR4_WORD0_SIZE) {
1556 if ((buflen -= 8) < 0)
1557 goto out_resource;
1558 WRITE64(stat.size);
1559 }
1560 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1561 if ((buflen -= 4) < 0)
1562 goto out_resource;
1563 WRITE32(1);
1564 }
1565 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1566 if ((buflen -= 4) < 0)
1567 goto out_resource;
1568 WRITE32(1);
1569 }
1570 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1571 if ((buflen -= 4) < 0)
1572 goto out_resource;
1573 WRITE32(0);
1574 }
1575 if (bmval0 & FATTR4_WORD0_FSID) {
1576 if ((buflen -= 16) < 0)
1577 goto out_resource;
42ca0993
BF		 1578 if (exp->ex_fslocs.migrated) {
1579 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1580 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 1581 } else switch(fsid_source(fhp)) {
1582 case FSIDSOURCE_FSID:
1da177e4
LT		 1583 WRITE64((u64)exp->ex_fsid);
1584 WRITE64((u64)0);
af6a4e28
N		 1585 break;
1586 case FSIDSOURCE_DEV:
1da177e4
LT		 1587 WRITE32(0);
1588 WRITE32(MAJOR(stat.dev));
1589 WRITE32(0);
1590 WRITE32(MINOR(stat.dev));
af6a4e28
N		 1591 break;
1592 case FSIDSOURCE_UUID:
1593 WRITEMEM(exp->ex_uuid, 16);
1594 break;
1da177e4
LT		 1595 }
1596 }
1597 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1598 if ((buflen -= 4) < 0)
1599 goto out_resource;
1600 WRITE32(0);
1601 }
1602 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1603 if ((buflen -= 4) < 0)
1604 goto out_resource;
1605 WRITE32(NFSD_LEASE_TIME);
1606 }
1607 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1608 if ((buflen -= 4) < 0)
1609 goto out_resource;
42ca0993 1610 WRITE32(rdattr_err);
1da177e4
LT		 1611 }
1612 if (bmval0 & FATTR4_WORD0_ACL) {
1613 struct nfs4_ace *ace;
1da177e4
LT		 1614
1615 if (acl == NULL) {
1616 if ((buflen -= 4) < 0)
1617 goto out_resource;
1618
1619 WRITE32(0);
1620 goto out_acl;
1621 }
1622 if ((buflen -= 4) < 0)
1623 goto out_resource;
1624 WRITE32(acl->naces);
1625
28e05dd8 1626 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 1627 if ((buflen -= 4*3) < 0)
1628 goto out_resource;
1629 WRITE32(ace->type);
1630 WRITE32(ace->flag);
1631 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1632 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1633 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1634 &p, &buflen);
1635 if (status == nfserr_resource)
1636 goto out_resource;
1637 if (status)
1638 goto out;
1639 }
1640 }
1641out_acl:
1642 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1643 if ((buflen -= 4) < 0)
1644 goto out_resource;
1645 WRITE32(aclsupport ?
1646 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1647 }
1648 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1649 if ((buflen -= 4) < 0)
1650 goto out_resource;
1651 WRITE32(1);
1652 }
1653 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1654 if ((buflen -= 4) < 0)
1655 goto out_resource;
1656 WRITE32(1);
1657 }
1658 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1659 if ((buflen -= 4) < 0)
1660 goto out_resource;
1661 WRITE32(1);
1662 }
1663 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1664 if ((buflen -= 4) < 0)
1665 goto out_resource;
1666 WRITE32(1);
1667 }
1668 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1669 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1670 if (buflen < 0)
1671 goto out_resource;
1672 WRITE32(fhp->fh_handle.fh_size);
1673 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1674 }
1675 if (bmval0 & FATTR4_WORD0_FILEID) {
1676 if ((buflen -= 8) < 0)
1677 goto out_resource;
40ee5dc6 1678 WRITE64(stat.ino);
1da177e4
LT		 1679 }
1680 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1681 if ((buflen -= 8) < 0)
1682 goto out_resource;
1683 WRITE64((u64) statfs.f_ffree);
1684 }
1685 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1686 if ((buflen -= 8) < 0)
1687 goto out_resource;
1688 WRITE64((u64) statfs.f_ffree);
1689 }
1690 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1691 if ((buflen -= 8) < 0)
1692 goto out_resource;
1693 WRITE64((u64) statfs.f_files);
1694 }
81c3f413
BF		 1695 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1696 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1697 if (status == nfserr_resource)
1698 goto out_resource;
1699 if (status)
1700 goto out;
1701 }
1da177e4
LT		 1702 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1703 if ((buflen -= 4) < 0)
1704 goto out_resource;
1705 WRITE32(1);
1706 }
1707 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1708 if ((buflen -= 8) < 0)
1709 goto out_resource;
1710 WRITE64(~(u64)0);
1711 }
1712 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1713 if ((buflen -= 4) < 0)
1714 goto out_resource;
1715 WRITE32(255);
1716 }
1717 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1718 if ((buflen -= 4) < 0)
1719 goto out_resource;
a16e92ed 1720 WRITE32(statfs.f_namelen);
1da177e4
LT		 1721 }
1722 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1723 if ((buflen -= 8) < 0)
1724 goto out_resource;
7adae489 1725 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 1726 }
1727 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1728 if ((buflen -= 8) < 0)
1729 goto out_resource;
7adae489 1730 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 1731 }
1732 if (bmval1 & FATTR4_WORD1_MODE) {
1733 if ((buflen -= 4) < 0)
1734 goto out_resource;
1735 WRITE32(stat.mode & S_IALLUGO);
1736 }
1737 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1738 if ((buflen -= 4) < 0)
1739 goto out_resource;
1740 WRITE32(1);
1741 }
1742 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1743 if ((buflen -= 4) < 0)
1744 goto out_resource;
1745 WRITE32(stat.nlink);
1746 }
1747 if (bmval1 & FATTR4_WORD1_OWNER) {
1748 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1749 if (status == nfserr_resource)
1750 goto out_resource;
1751 if (status)
1752 goto out;
1753 }
1754 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1755 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1756 if (status == nfserr_resource)
1757 goto out_resource;
1758 if (status)
1759 goto out;
1760 }
1761 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1762 if ((buflen -= 8) < 0)
1763 goto out_resource;
1764 WRITE32((u32) MAJOR(stat.rdev));
1765 WRITE32((u32) MINOR(stat.rdev));
1766 }
1767 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1768 if ((buflen -= 8) < 0)
1769 goto out_resource;
1770 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1771 WRITE64(dummy64);
1772 }
1773 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1774 if ((buflen -= 8) < 0)
1775 goto out_resource;
1776 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1777 WRITE64(dummy64);
1778 }
1779 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1780 if ((buflen -= 8) < 0)
1781 goto out_resource;
1782 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1783 WRITE64(dummy64);
1784 }
1785 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1786 if ((buflen -= 8) < 0)
1787 goto out_resource;
1788 dummy64 = (u64)stat.blocks << 9;
1789 WRITE64(dummy64);
1790 }
1791 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1792 if ((buflen -= 12) < 0)
1793 goto out_resource;
1794 WRITE32(0);
1795 WRITE32(stat.atime.tv_sec);
1796 WRITE32(stat.atime.tv_nsec);
1797 }
1798 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1799 if ((buflen -= 12) < 0)
1800 goto out_resource;
1801 WRITE32(0);
1802 WRITE32(1);
1803 WRITE32(0);
1804 }
1805 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1806 if ((buflen -= 12) < 0)
1807 goto out_resource;
1808 WRITE32(0);
1809 WRITE32(stat.ctime.tv_sec);
1810 WRITE32(stat.ctime.tv_nsec);
1811 }
1812 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1813 if ((buflen -= 12) < 0)
1814 goto out_resource;
1815 WRITE32(0);
1816 WRITE32(stat.mtime.tv_sec);
1817 WRITE32(stat.mtime.tv_nsec);
1818 }
1819 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 1820 if ((buflen -= 8) < 0)
1821 goto out_resource;
406a7ea9
FF		 1822 /*
1823 * Get parent's attributes if not ignoring crossmount
1824 * and this is the root of a cross-mounted filesystem.
1825 */
1826 if (ignore_crossmnt == 0 &&
54775491
JB		 1827 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
1828 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
1829 exp->ex_path.mnt->mnt_mountpoint, &stat);
40ee5dc6
PS		 1830 if (err)
1831 goto out_nfserr;
1832 }
1833 WRITE64(stat.ino);
1da177e4
LT		 1834 }
1835 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1836 *countp = p - buffer;
1837 status = nfs_ok;
1838
1839out:
28e05dd8 1840 kfree(acl);
1da177e4
LT		 1841 if (fhp == &tempfh)
1842 fh_put(&tempfh);
1843 return status;
1844out_nfserr:
b8dd7b9a 1845 status = nfserrno(err);
1da177e4
LT		 1846 goto out;
1847out_resource:
1848 *countp = 0;
1849 status = nfserr_resource;
1850 goto out;
1851out_serverfault:
1852 status = nfserr_serverfault;
1853 goto out;
1854}
1855
c0ce6ec8
BF		 1856static inline int attributes_need_mount(u32 *bmval)
1857{
1858 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
1859 return 1;
1860 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
1861 return 1;
1862 return 0;
1863}
1864
b37ad28b 1865static __be32
1da177e4 1866nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2ebbc012 1867 const char *name, int namlen, __be32 *p, int *buflen)
1da177e4
LT		 1868{
1869 struct svc_export *exp = cd->rd_fhp->fh_export;
1870 struct dentry *dentry;
b37ad28b 1871 __be32 nfserr;
406a7ea9 1872 int ignore_crossmnt = 0;
1da177e4
LT		 1873
1874 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1875 if (IS_ERR(dentry))
1876 return nfserrno(PTR_ERR(dentry));
1877
1878 exp_get(exp);
406a7ea9
FF		 1879 /*
1880 * In the case of a mountpoint, the client may be asking for
1881 * attributes that are only properties of the underlying filesystem
1882 * as opposed to the cross-mounted file system. In such a case,
1883 * we will not follow the cross mount and will fill the attribtutes
1884 * directly from the mountpoint dentry.
1885 */
c0ce6ec8 1886 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
406a7ea9
FF		 1887 ignore_crossmnt = 1;
1888 else if (d_mountpoint(dentry)) {
021d3a72
BF		 1889 int err;
1890
dcb488a3
AA		 1891 /*
1892 * Why the heck aren't we just using nfsd_lookup??
1893 * Different "."/".." handling? Something else?
1894 * At least, add a comment here to explain....
1895 */
021d3a72
BF		 1896 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
1897 if (err) {
1898 nfserr = nfserrno(err);
1da177e4
LT		 1899 goto out_put;
1900 }
dcb488a3
AA		 1901 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
1902 if (nfserr)
1903 goto out_put;
1da177e4
LT		 1904
1905 }
1906 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 1907 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 1908out_put:
1909 dput(dentry);
1910 exp_put(exp);
1911 return nfserr;
1912}
1913
2ebbc012 1914static __be32 *
b37ad28b 1915nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 1916{
2ebbc012 1917 __be32 *attrlenp;
1da177e4
LT		 1918
1919 if (buflen < 6)
1920 return NULL;
1921 *p++ = htonl(2);
1922 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
1923 *p++ = htonl(0); /* bmval1 */
1924
1925 attrlenp = p++;
1926 *p++ = nfserr; /* no htonl */
1927 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1928 return p;
1929}
1930
1931static int
a0ad13ef
N		 1932nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
1933 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 1934{
a0ad13ef 1935 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 1936 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1937 int buflen;
2ebbc012 1938 __be32 *p = cd->buffer;
b37ad28b 1939 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 1940
1941 /* In nfsv4, "." and ".." never make it onto the wire.. */
1942 if (name && isdotent(name, namlen)) {
1943 cd->common.err = nfs_ok;
1944 return 0;
1945 }
1946
1947 if (cd->offset)
1948 xdr_encode_hyper(cd->offset, (u64) offset);
1949
1950 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1951 if (buflen < 0)
1952 goto fail;
1953
1954 *p++ = xdr_one; /* mark entry present */
1955 cd->offset = p; /* remember pointer */
1956 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1957 p = xdr_encode_array(p, name, namlen); /* name length & name */
1958
1959 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
1960 switch (nfserr) {
1961 case nfs_ok:
1962 p += buflen;
1963 break;
1964 case nfserr_resource:
1965 nfserr = nfserr_toosmall;
1966 goto fail;
1967 case nfserr_dropit:
1968 goto fail;
1969 default:
1970 /*
1971 * If the client requested the RDATTR_ERROR attribute,
1972 * we stuff the error code into this attribute
1973 * and continue. If this attribute was not requested,
1974 * then in accordance with the spec, we fail the
1975 * entire READDIR operation(!)
1976 */
1977 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
1978 goto fail;
1da177e4 1979 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 1980 if (p == NULL) {
1981 nfserr = nfserr_toosmall;
1da177e4 1982 goto fail;
34081efc 1983 }
1da177e4
LT		 1984 }
1985 cd->buflen -= (p - cd->buffer);
1986 cd->buffer = p;
1987 cd->common.err = nfs_ok;
1988 return 0;
1989fail:
1990 cd->common.err = nfserr;
1991 return -EINVAL;
1992}
1993
1994static void
b37ad28b 1995nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4
LT		 1996{
1997 ENCODE_HEAD;
1998
1999 if (!nfserr) {
2000 RESERVE_SPACE(8);
2001 WRITE32(access->ac_supported);
2002 WRITE32(access->ac_resp_access);
2003 ADJUST_ARGS();
2004 }
2005}
2006
2007static void
b37ad28b 2008nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4
LT		 2009{
2010 ENCODE_SEQID_OP_HEAD;
2011
2012 if (!nfserr) {
2013 RESERVE_SPACE(sizeof(stateid_t));
2014 WRITE32(close->cl_stateid.si_generation);
2015 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
2016 ADJUST_ARGS();
2017 }
2018 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2019}
2020
2021
2022static void
b37ad28b 2023nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4
LT		 2024{
2025 ENCODE_HEAD;
2026
2027 if (!nfserr) {
2028 RESERVE_SPACE(8);
2029 WRITEMEM(commit->co_verf.data, 8);
2030 ADJUST_ARGS();
2031 }
2032}
2033
2034static void
b37ad28b 2035nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4
LT		 2036{
2037 ENCODE_HEAD;
2038
2039 if (!nfserr) {
2040 RESERVE_SPACE(32);
2041 WRITECINFO(create->cr_cinfo);
2042 WRITE32(2);
2043 WRITE32(create->cr_bmval[0]);
2044 WRITE32(create->cr_bmval[1]);
2045 ADJUST_ARGS();
2046 }
2047}
2048
b37ad28b
AV		 2049static __be32
2050nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2051{
2052 struct svc_fh *fhp = getattr->ga_fhp;
2053 int buflen;
2054
2055 if (nfserr)
2056 return nfserr;
2057
2058 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2059 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2060 resp->p, &buflen, getattr->ga_bmval,
406a7ea9 2061 resp->rqstp, 0);
1da177e4
LT		 2062 if (!nfserr)
2063 resp->p += buflen;
2064 return nfserr;
2065}
2066
2067static void
b37ad28b 2068nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh *fhp)
1da177e4
LT		 2069{
2070 unsigned int len;
2071 ENCODE_HEAD;
2072
2073 if (!nfserr) {
2074 len = fhp->fh_handle.fh_size;
2075 RESERVE_SPACE(len + 4);
2076 WRITE32(len);
2077 WRITEMEM(&fhp->fh_handle.fh_base, len);
2078 ADJUST_ARGS();
2079 }
2080}
2081
2082/*
2083* Including all fields other than the name, a LOCK4denied structure requires
2084* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2085*/
2086static void
2087nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2088{
2089 ENCODE_HEAD;
2090
2091 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2092 WRITE64(ld->ld_start);
2093 WRITE64(ld->ld_length);
2094 WRITE32(ld->ld_type);
2095 if (ld->ld_sop) {
2096 WRITEMEM(&ld->ld_clientid, 8);
2097 WRITE32(ld->ld_sop->so_owner.len);
2098 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2099 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2100 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2101 WRITE64((u64)0); /* clientid */
2102 WRITE32(0); /* length of owner name */
2103 }
2104 ADJUST_ARGS();
2105}
2106
2107static void
b37ad28b 2108nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2109{
1da177e4
LT		 2110 ENCODE_SEQID_OP_HEAD;
2111
2112 if (!nfserr) {
2113 RESERVE_SPACE(4 + sizeof(stateid_t));
2114 WRITE32(lock->lk_resp_stateid.si_generation);
2115 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2116 ADJUST_ARGS();
2117 } else if (nfserr == nfserr_denied)
2118 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2119
3a65588a 2120 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
1da177e4
LT		 2121}
2122
2123static void
b37ad28b 2124nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2125{
2126 if (nfserr == nfserr_denied)
2127 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2128}
2129
2130static void
b37ad28b 2131nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4
LT		 2132{
2133 ENCODE_SEQID_OP_HEAD;
2134
2135 if (!nfserr) {
2136 RESERVE_SPACE(sizeof(stateid_t));
2137 WRITE32(locku->lu_stateid.si_generation);
2138 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
2139 ADJUST_ARGS();
2140 }
2141
2142 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2143}
2144
2145
2146static void
b37ad28b 2147nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4
LT		 2148{
2149 ENCODE_HEAD;
2150
2151 if (!nfserr) {
2152 RESERVE_SPACE(20);
2153 WRITECINFO(link->li_cinfo);
2154 ADJUST_ARGS();
2155 }
2156}
2157
2158
2159static void
b37ad28b 2160nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4
LT		 2161{
2162 ENCODE_SEQID_OP_HEAD;
2163
2164 if (nfserr)
2165 goto out;
2166
2167 RESERVE_SPACE(36 + sizeof(stateid_t));
2168 WRITE32(open->op_stateid.si_generation);
2169 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
2170 WRITECINFO(open->op_cinfo);
2171 WRITE32(open->op_rflags);
2172 WRITE32(2);
2173 WRITE32(open->op_bmval[0]);
2174 WRITE32(open->op_bmval[1]);
2175 WRITE32(open->op_delegate_type);
2176 ADJUST_ARGS();
2177
2178 switch (open->op_delegate_type) {
2179 case NFS4_OPEN_DELEGATE_NONE:
2180 break;
2181 case NFS4_OPEN_DELEGATE_READ:
2182 RESERVE_SPACE(20 + sizeof(stateid_t));
2183 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
7b190fec 2184 WRITE32(open->op_recall);
1da177e4
LT		 2185
2186 /*
2187 * TODO: ACE's in delegations
2188 */
2189 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2190 WRITE32(0);
2191 WRITE32(0);
2192 WRITE32(0); /* XXX: is NULL principal ok? */
2193 ADJUST_ARGS();
2194 break;
2195 case NFS4_OPEN_DELEGATE_WRITE:
2196 RESERVE_SPACE(32 + sizeof(stateid_t));
2197 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
2198 WRITE32(0);
2199
2200 /*
2201 * TODO: space_limit's in delegations
2202 */
2203 WRITE32(NFS4_LIMIT_SIZE);
2204 WRITE32(~(u32)0);
2205 WRITE32(~(u32)0);
2206
2207 /*
2208 * TODO: ACE's in delegations
2209 */
2210 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2211 WRITE32(0);
2212 WRITE32(0);
2213 WRITE32(0); /* XXX: is NULL principal ok? */
2214 ADJUST_ARGS();
2215 break;
2216 default:
2217 BUG();
2218 }
2219 /* XXX save filehandle here */
2220out:
2221 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2222}
2223
2224static void
b37ad28b 2225nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4
LT		 2226{
2227 ENCODE_SEQID_OP_HEAD;
2228
2229 if (!nfserr) {
2230 RESERVE_SPACE(sizeof(stateid_t));
2231 WRITE32(oc->oc_resp_stateid.si_generation);
2232 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2233 ADJUST_ARGS();
2234 }
2235
2236 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2237}
2238
2239static void
b37ad28b 2240nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4
LT		 2241{
2242 ENCODE_SEQID_OP_HEAD;
2243
2244 if (!nfserr) {
2245 RESERVE_SPACE(sizeof(stateid_t));
2246 WRITE32(od->od_stateid.si_generation);
2247 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2248 ADJUST_ARGS();
2249 }
2250
2251 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2252}
2253
b37ad28b
AV		 2254static __be32
2255nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2256 struct nfsd4_read *read)
1da177e4
LT		 2257{
2258 u32 eof;
2259 int v, pn;
2260 unsigned long maxcount;
2261 long len;
2262 ENCODE_HEAD;
2263
2264 if (nfserr)
2265 return nfserr;
2266 if (resp->xbuf->page_len)
2267 return nfserr_resource;
2268
2269 RESERVE_SPACE(8); /* eof flag and byte count */
2270
7adae489 2271 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2272 if (maxcount > read->rd_length)
2273 maxcount = read->rd_length;
2274
2275 len = maxcount;
2276 v = 0;
2277 while (len > 0) {
44524359 2278 pn = resp->rqstp->rq_resused++;
3cc03b16 2279 resp->rqstp->rq_vec[v].iov_base =
44524359 2280 page_address(resp->rqstp->rq_respages[pn]);
3cc03b16 2281 resp->rqstp->rq_vec[v].iov_len =
44524359 2282 len < PAGE_SIZE ? len : PAGE_SIZE;
1da177e4
LT		 2283 v++;
2284 len -= PAGE_SIZE;
2285 }
2286 read->rd_vlen = v;
2287
2288 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2289 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2290 &maxcount);
2291
2292 if (nfserr == nfserr_symlink)
2293 nfserr = nfserr_inval;
2294 if (nfserr)
2295 return nfserr;
44524359
N		 2296 eof = (read->rd_offset + maxcount >=
2297 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2298
2299 WRITE32(eof);
2300 WRITE32(maxcount);
2301 ADJUST_ARGS();
6ed6decc
N		 2302 resp->xbuf->head[0].iov_len = (char*)p
2303 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2304 resp->xbuf->page_len = maxcount;
2305
6ed6decc 2306 /* Use rest of head for padding and remaining ops: */
6ed6decc 2307 resp->xbuf->tail[0].iov_base = p;
1da177e4 2308 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2309 if (maxcount&3) {
6ed6decc
N		 2310 RESERVE_SPACE(4);
2311 WRITE32(0);
1da177e4
LT		 2312 resp->xbuf->tail[0].iov_base += maxcount&3;
2313 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2314 ADJUST_ARGS();
1da177e4
LT		 2315 }
2316 return 0;
2317}
2318
b37ad28b
AV		 2319static __be32
2320nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 2321{
2322 int maxcount;
2323 char *page;
2324 ENCODE_HEAD;
2325
2326 if (nfserr)
2327 return nfserr;
2328 if (resp->xbuf->page_len)
2329 return nfserr_resource;
2330
44524359 2331 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2332
2333 maxcount = PAGE_SIZE;
2334 RESERVE_SPACE(4);
2335
2336 /*
2337 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2338 * if they would overflow the buffer. Is this kosher in NFSv4? If
2339 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2340 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2341 */
2342 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2343 if (nfserr == nfserr_isdir)
2344 return nfserr_inval;
2345 if (nfserr)
2346 return nfserr;
2347
2348 WRITE32(maxcount);
2349 ADJUST_ARGS();
6ed6decc
N		 2350 resp->xbuf->head[0].iov_len = (char*)p
2351 - (char*)resp->xbuf->head[0].iov_base;
2352 resp->xbuf->page_len = maxcount;
1da177e4 2353
6ed6decc 2354 /* Use rest of head for padding and remaining ops: */
6ed6decc 2355 resp->xbuf->tail[0].iov_base = p;
1da177e4 2356 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2357 if (maxcount&3) {
6ed6decc
N		 2358 RESERVE_SPACE(4);
2359 WRITE32(0);
1da177e4
LT		 2360 resp->xbuf->tail[0].iov_base += maxcount&3;
2361 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2362 ADJUST_ARGS();
1da177e4
LT		 2363 }
2364 return 0;
2365}
2366
b37ad28b
AV		 2367static __be32
2368nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 2369{
2370 int maxcount;
2371 loff_t offset;
2ebbc012 2372 __be32 *page, *savep, *tailbase;
1da177e4
LT		 2373 ENCODE_HEAD;
2374
2375 if (nfserr)
2376 return nfserr;
2377 if (resp->xbuf->page_len)
2378 return nfserr_resource;
2379
2380 RESERVE_SPACE(8); /* verifier */
2381 savep = p;
2382
2383 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2384 WRITE32(0);
2385 WRITE32(0);
2386 ADJUST_ARGS();
2387 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 2388 tailbase = p;
1da177e4
LT		 2389
2390 maxcount = PAGE_SIZE;
2391 if (maxcount > readdir->rd_maxcount)
2392 maxcount = readdir->rd_maxcount;
2393
2394 /*
2395 * Convert from bytes to words, account for the two words already
2396 * written, make sure to leave two words at the end for the next
2397 * pointer and eof field.
2398 */
2399 maxcount = (maxcount >> 2) - 4;
2400 if (maxcount < 0) {
2401 nfserr = nfserr_toosmall;
2402 goto err_no_verf;
2403 }
2404
44524359 2405 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2406 readdir->common.err = 0;
2407 readdir->buflen = maxcount;
2408 readdir->buffer = page;
2409 readdir->offset = NULL;
2410
2411 offset = readdir->rd_cookie;
2412 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2413 &offset,
2414 &readdir->common, nfsd4_encode_dirent);
2415 if (nfserr == nfs_ok &&
2416 readdir->common.err == nfserr_toosmall &&
2417 readdir->buffer == page)
2418 nfserr = nfserr_toosmall;
2419 if (nfserr == nfserr_symlink)
2420 nfserr = nfserr_notdir;
2421 if (nfserr)
2422 goto err_no_verf;
2423
2424 if (readdir->offset)
2425 xdr_encode_hyper(readdir->offset, offset);
2426
2427 p = readdir->buffer;
2428 *p++ = 0; /* no more entries */
2429 *p++ = htonl(readdir->common.err == nfserr_eof);
44524359
N		 2430 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2431 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
1da177e4 2432
bb6e8a9f 2433 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 2434 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 2435 resp->xbuf->tail[0].iov_len = 0;
2436 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 2437 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 2438
2439 return 0;
2440err_no_verf:
2441 p = savep;
2442 ADJUST_ARGS();
2443 return nfserr;
2444}
2445
2446static void
b37ad28b 2447nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4
LT		 2448{
2449 ENCODE_HEAD;
2450
2451 if (!nfserr) {
2452 RESERVE_SPACE(20);
2453 WRITECINFO(remove->rm_cinfo);
2454 ADJUST_ARGS();
2455 }
2456}
2457
2458static void
b37ad28b 2459nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4
LT		 2460{
2461 ENCODE_HEAD;
2462
2463 if (!nfserr) {
2464 RESERVE_SPACE(40);
2465 WRITECINFO(rename->rn_sinfo);
2466 WRITECINFO(rename->rn_tinfo);
2467 ADJUST_ARGS();
2468 }
2469}
2470
dcb488a3 2471static void
ca5c8cde 2472nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
dcb488a3
AA		 2473 struct nfsd4_secinfo *secinfo)
2474{
2475 int i = 0;
2476 struct svc_export *exp = secinfo->si_exp;
4796f457
BF		 2477 u32 nflavs;
2478 struct exp_flavor_info *flavs;
2479 struct exp_flavor_info def_flavs[2];
dcb488a3
AA		 2480 ENCODE_HEAD;
2481
2482 if (nfserr)
2483 goto out;
4796f457
BF		 2484 if (exp->ex_nflavors) {
2485 flavs = exp->ex_flavors;
2486 nflavs = exp->ex_nflavors;
2487 } else { /* Handling of some defaults in absence of real secinfo: */
2488 flavs = def_flavs;
2489 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2490 nflavs = 2;
2491 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2492 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2493 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2494 nflavs = 1;
2495 flavs[0].pseudoflavor
2496 = svcauth_gss_flavor(exp->ex_client);
2497 } else {
2498 nflavs = 1;
2499 flavs[0].pseudoflavor
2500 = exp->ex_client->flavour->flavour;
2501 }
2502 }
2503
dcb488a3 2504 RESERVE_SPACE(4);
4796f457 2505 WRITE32(nflavs);
dcb488a3 2506 ADJUST_ARGS();
4796f457
BF		 2507 for (i = 0; i < nflavs; i++) {
2508 u32 flav = flavs[i].pseudoflavor;
dcb488a3
AA		 2509 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2510
2511 if (gm) {
2512 RESERVE_SPACE(4);
2513 WRITE32(RPC_AUTH_GSS);
2514 ADJUST_ARGS();
2515 RESERVE_SPACE(4 + gm->gm_oid.len);
2516 WRITE32(gm->gm_oid.len);
2517 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2518 ADJUST_ARGS();
2519 RESERVE_SPACE(4);
2520 WRITE32(0); /* qop */
2521 ADJUST_ARGS();
2522 RESERVE_SPACE(4);
2523 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2524 ADJUST_ARGS();
2525 gss_mech_put(gm);
2526 } else {
2527 RESERVE_SPACE(4);
2528 WRITE32(flav);
2529 ADJUST_ARGS();
2530 }
2531 }
2532out:
2533 if (exp)
2534 exp_put(exp);
2535}
2536
1da177e4
LT		 2537/*
2538 * The SETATTR encode routine is special -- it always encodes a bitmap,
2539 * regardless of the error status.
2540 */
2541static void
b37ad28b 2542nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4
LT		 2543{
2544 ENCODE_HEAD;
2545
2546 RESERVE_SPACE(12);
2547 if (nfserr) {
2548 WRITE32(2);
2549 WRITE32(0);
2550 WRITE32(0);
2551 }
2552 else {
2553 WRITE32(2);
2554 WRITE32(setattr->sa_bmval[0]);
2555 WRITE32(setattr->sa_bmval[1]);
2556 }
2557 ADJUST_ARGS();
2558}
2559
2560static void
b37ad28b 2561nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4
LT		 2562{
2563 ENCODE_HEAD;
2564
2565 if (!nfserr) {
2566 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2567 WRITEMEM(&scd->se_clientid, 8);
2568 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2569 ADJUST_ARGS();
2570 }
2571 else if (nfserr == nfserr_clid_inuse) {
2572 RESERVE_SPACE(8);
2573 WRITE32(0);
2574 WRITE32(0);
2575 ADJUST_ARGS();
2576 }
2577}
2578
2579static void
b37ad28b 2580nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4
LT		 2581{
2582 ENCODE_HEAD;
2583
2584 if (!nfserr) {
2585 RESERVE_SPACE(16);
2586 WRITE32(write->wr_bytes_written);
2587 WRITE32(write->wr_how_written);
2588 WRITEMEM(write->wr_verifier.data, 8);
2589 ADJUST_ARGS();
2590 }
2591}
2592
2593void
2594nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2595{
2ebbc012 2596 __be32 *statp;
1da177e4
LT		 2597 ENCODE_HEAD;
2598
2599 RESERVE_SPACE(8);
2600 WRITE32(op->opnum);
2601 statp = p++; /* to be backfilled at the end */
2602 ADJUST_ARGS();
2603
2604 switch (op->opnum) {
2605 case OP_ACCESS:
2606 nfsd4_encode_access(resp, op->status, &op->u.access);
2607 break;
2608 case OP_CLOSE:
2609 nfsd4_encode_close(resp, op->status, &op->u.close);
2610 break;
2611 case OP_COMMIT:
2612 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2613 break;
2614 case OP_CREATE:
2615 nfsd4_encode_create(resp, op->status, &op->u.create);
2616 break;
2617 case OP_DELEGRETURN:
2618 break;
2619 case OP_GETATTR:
2620 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2621 break;
2622 case OP_GETFH:
2623 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2624 break;
2625 case OP_LINK:
2626 nfsd4_encode_link(resp, op->status, &op->u.link);
2627 break;
2628 case OP_LOCK:
2629 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2630 break;
2631 case OP_LOCKT:
2632 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2633 break;
2634 case OP_LOCKU:
2635 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2636 break;
2637 case OP_LOOKUP:
2638 break;
2639 case OP_LOOKUPP:
2640 break;
2641 case OP_NVERIFY:
2642 break;
2643 case OP_OPEN:
2644 nfsd4_encode_open(resp, op->status, &op->u.open);
2645 break;
2646 case OP_OPEN_CONFIRM:
2647 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2648 break;
2649 case OP_OPEN_DOWNGRADE:
2650 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2651 break;
2652 case OP_PUTFH:
2653 break;
2654 case OP_PUTROOTFH:
2655 break;
2656 case OP_READ:
2657 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2658 break;
2659 case OP_READDIR:
2660 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2661 break;
2662 case OP_READLINK:
2663 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2664 break;
2665 case OP_REMOVE:
2666 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2667 break;
2668 case OP_RENAME:
2669 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2670 break;
2671 case OP_RENEW:
2672 break;
2673 case OP_RESTOREFH:
2674 break;
2675 case OP_SAVEFH:
2676 break;
dcb488a3
AA		 2677 case OP_SECINFO:
2678 nfsd4_encode_secinfo(resp, op->status, &op->u.secinfo);
2679 break;
1da177e4
LT		 2680 case OP_SETATTR:
2681 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2682 break;
2683 case OP_SETCLIENTID:
2684 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2685 break;
2686 case OP_SETCLIENTID_CONFIRM:
2687 break;
2688 case OP_VERIFY:
2689 break;
2690 case OP_WRITE:
2691 nfsd4_encode_write(resp, op->status, &op->u.write);
2692 break;
2693 case OP_RELEASE_LOCKOWNER:
2694 break;
2695 default:
2696 break;
2697 }
2698
2699 /*
2700 * Note: We write the status directly, instead of using WRITE32(),
2701 * since it is already in network byte order.
2702 */
2703 *statp = op->status;
2704}
2705
2706/*
2707 * Encode the reply stored in the stateowner reply cache
2708 *
2709 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2710 * previously sent already encoded operation.
2711 *
2712 * called with nfs4_lock_state() held
2713 */
2714void
2715nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2716{
2717 ENCODE_HEAD;
2718 struct nfs4_replay *rp = op->replay;
2719
2720 BUG_ON(!rp);
2721
2722 RESERVE_SPACE(8);
2723 WRITE32(op->opnum);
2724 *p++ = rp->rp_status; /* already xdr'ed */
2725 ADJUST_ARGS();
2726
2727 RESERVE_SPACE(rp->rp_buflen);
2728 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2729 ADJUST_ARGS();
2730}
2731
2732/*
2733 * END OF "GENERIC" ENCODE ROUTINES.
2734 */
2735
2736int
2ebbc012 2737nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 2738{
2739 return xdr_ressize_check(rqstp, p);
2740}
2741
2742void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2743{
2744 if (args->ops != args->iops) {
2745 kfree(args->ops);
2746 args->ops = args->iops;
2747 }
f99d49ad
JJ		 2748 kfree(args->tmpp);
2749 args->tmpp = NULL;
1da177e4
LT		 2750 while (args->to_free) {
2751 struct tmpbuf *tb = args->to_free;
2752 args->to_free = tb->next;
2753 tb->release(tb->buf);
2754 kfree(tb);
2755 }
2756}
2757
2758int
2ebbc012 2759nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 2760{
b37ad28b 2761 __be32 status;
1da177e4
LT		 2762
2763 args->p = p;
2764 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2765 args->pagelist = rqstp->rq_arg.pages;
2766 args->pagelen = rqstp->rq_arg.page_len;
2767 args->tmpp = NULL;
2768 args->to_free = NULL;
2769 args->ops = args->iops;
2770 args->rqstp = rqstp;
2771
2772 status = nfsd4_decode_compound(args);
2773 if (status) {
2774 nfsd4_release_compoundargs(args);
2775 }
2776 return !status;
2777}
2778
2779int
2ebbc012 2780nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 2781{
2782 /*
2783 * All that remains is to write the tag and operation count...
2784 */
2785 struct kvec *iov;
2786 p = resp->tagp;
2787 *p++ = htonl(resp->taglen);
2788 memcpy(p, resp->tag, resp->taglen);
2789 p += XDR_QUADLEN(resp->taglen);
2790 *p++ = htonl(resp->opcnt);
2791
2792 if (rqstp->rq_res.page_len)
2793 iov = &rqstp->rq_res.tail[0];
2794 else
2795 iov = &rqstp->rq_res.head[0];
2796 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2797 BUG_ON(iov->iov_len > PAGE_SIZE);
2798 return 1;
2799}
2800
2801/*
2802 * Local variables:
2803 * c-basic-offset: 8
2804 * End:
2805 */
Linux kernel - Deliverables
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