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nfsd4: seq->status_flags may be used unitialized
[mirror_ubuntu-focal-kernel.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
5a0e3ad6 43#include <linux/slab.h>
1da177e4 44#include <linux/namei.h>
341eb184 45#include <linux/statfs.h>
0733d213 46#include <linux/utsname.h>
17456804 47#include <linux/pagemap.h>
4796f457 48#include <linux/sunrpc/svcauth_gss.h>
9a74af21 49
2ca72e17
BF		 50#include "idmap.h"
51#include "acl.h"
9a74af21 52#include "xdr4.h"
0a3adade 53#include "vfs.h"
17456804 54#include "state.h"
1091006c 55#include "cache.h"
2ca72e17 56
1da177e4
LT		 57#define NFSDDBG_FACILITY NFSDDBG_XDR
58
42ca0993
BF		 59/*
60 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
61 * directory in order to indicate to the client that a filesystem boundary is present
62 * We use a fixed fsid for a referral
63 */
64#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
65#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
66
b37ad28b
AV		 67static __be32
68check_filename(char *str, int len, __be32 err)
1da177e4
LT		 69{
70 int i;
71
72 if (len == 0)
73 return nfserr_inval;
74 if (isdotent(str, len))
75 return err;
76 for (i = 0; i < len; i++)
77 if (str[i] == '/')
78 return err;
79 return 0;
80}
81
1da177e4 82#define DECODE_HEAD \
2ebbc012 83 __be32 *p; \
b37ad28b 84 __be32 status
1da177e4
LT		 85#define DECODE_TAIL \
86 status = 0; \
87out: \
88 return status; \
89xdr_error: \
817cb9d4
CL		 90 dprintk("NFSD: xdr error (%s:%d)\n", \
91 __FILE__, __LINE__); \
1da177e4
LT		 92 status = nfserr_bad_xdr; \
93 goto out
94
95#define READ32(x) (x) = ntohl(*p++)
96#define READ64(x) do { \
97 (x) = (u64)ntohl(*p++) << 32; \
98 (x) |= ntohl(*p++); \
99} while (0)
100#define READTIME(x) do { \
101 p++; \
102 (x) = ntohl(*p++); \
103 p++; \
104} while (0)
105#define READMEM(x,nbytes) do { \
106 x = (char *)p; \
107 p += XDR_QUADLEN(nbytes); \
108} while (0)
109#define SAVEMEM(x,nbytes) do { \
110 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
111 savemem(argp, p, nbytes) : \
112 (char *)p)) { \
817cb9d4
CL		 113 dprintk("NFSD: xdr error (%s:%d)\n", \
114 __FILE__, __LINE__); \
1da177e4
LT		 115 goto xdr_error; \
116 } \
117 p += XDR_QUADLEN(nbytes); \
118} while (0)
119#define COPYMEM(x,nbytes) do { \
120 memcpy((x), p, nbytes); \
121 p += XDR_QUADLEN(nbytes); \
122} while (0)
123
124/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
125#define READ_BUF(nbytes) do { \
126 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
127 p = argp->p; \
128 argp->p += XDR_QUADLEN(nbytes); \
129 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 130 dprintk("NFSD: xdr error (%s:%d)\n", \
131 __FILE__, __LINE__); \
1da177e4
LT		 132 goto xdr_error; \
133 } \
134} while (0)
135
17456804
BS		 136static void save_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep)
137{
138 savep->p = argp->p;
139 savep->end = argp->end;
140 savep->pagelen = argp->pagelen;
141 savep->pagelist = argp->pagelist;
142}
143
144static void restore_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep)
145{
146 argp->p = savep->p;
147 argp->end = savep->end;
148 argp->pagelen = savep->pagelen;
149 argp->pagelist = savep->pagelist;
150}
151
ca2a05aa 152static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 153{
154 /* We want more bytes than seem to be available.
155 * Maybe we need a new page, maybe we have just run out
156 */
ca2a05aa 157 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 158 __be32 *p;
1da177e4
LT		 159 if (avail + argp->pagelen < nbytes)
160 return NULL;
161 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
162 return NULL;
163 /* ok, we can do it with the current plus the next page */
164 if (nbytes <= sizeof(argp->tmp))
165 p = argp->tmp;
166 else {
f99d49ad 167 kfree(argp->tmpp);
1da177e4
LT		 168 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
169 if (!p)
170 return NULL;
171
172 }
ca2a05aa
BF		 173 /*
174 * The following memcpy is safe because read_buf is always
175 * called with nbytes > avail, and the two cases above both
176 * guarantee p points to at least nbytes bytes.
177 */
1da177e4
LT		 178 memcpy(p, argp->p, avail);
179 /* step to next page */
180 argp->p = page_address(argp->pagelist[0]);
181 argp->pagelist++;
182 if (argp->pagelen < PAGE_SIZE) {
2bc3c117 183 argp->end = argp->p + (argp->pagelen>>2);
1da177e4
LT		 184 argp->pagelen = 0;
185 } else {
2bc3c117 186 argp->end = argp->p + (PAGE_SIZE>>2);
1da177e4
LT		 187 argp->pagelen -= PAGE_SIZE;
188 }
189 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
190 argp->p += XDR_QUADLEN(nbytes - avail);
191 return p;
192}
193
60adfc50
AA		 194static int zero_clientid(clientid_t *clid)
195{
196 return (clid->cl_boot == 0) && (clid->cl_id == 0);
197}
198
1da177e4
LT		 199static int
200defer_free(struct nfsd4_compoundargs *argp,
201 void (*release)(const void *), void *p)
202{
203 struct tmpbuf *tb;
204
205 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
206 if (!tb)
207 return -ENOMEM;
208 tb->buf = p;
209 tb->release = release;
210 tb->next = argp->to_free;
211 argp->to_free = tb;
212 return 0;
213}
214
2ebbc012 215static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 216{
1da177e4 217 if (p == argp->tmp) {
a4db5fe5
BF		 218 p = kmalloc(nbytes, GFP_KERNEL);
219 if (!p)
220 return NULL;
1da177e4
LT		 221 memcpy(p, argp->tmp, nbytes);
222 } else {
73dff8be 223 BUG_ON(p != argp->tmpp);
1da177e4
LT		 224 argp->tmpp = NULL;
225 }
226 if (defer_free(argp, kfree, p)) {
a4db5fe5 227 kfree(p);
1da177e4
LT		 228 return NULL;
229 } else
230 return (char *)p;
231}
232
b37ad28b 233static __be32
1da177e4
LT		 234nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
235{
236 u32 bmlen;
237 DECODE_HEAD;
238
239 bmval[0] = 0;
240 bmval[1] = 0;
7e705706 241 bmval[2] = 0;
1da177e4
LT		 242
243 READ_BUF(4);
244 READ32(bmlen);
245 if (bmlen > 1000)
246 goto xdr_error;
247
248 READ_BUF(bmlen << 2);
249 if (bmlen > 0)
250 READ32(bmval[0]);
251 if (bmlen > 1)
252 READ32(bmval[1]);
7e705706
AA		 253 if (bmlen > 2)
254 READ32(bmval[2]);
1da177e4
LT		 255
256 DECODE_TAIL;
257}
258
b37ad28b 259static __be32
3c8e0316 260nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
c0d6fc8a 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
1da177e4
LT		 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);
3c726023 310 status = nfs_ok;
28e05dd8
BF		 311 if (ace->whotype != NFS4_ACL_WHO_NAMED)
312 ace->who = 0;
313 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 314 status = nfsd_map_name_to_gid(argp->rqstp,
28e05dd8 315 buf, dummy32, &ace->who);
1da177e4 316 else
3c726023 317 status = nfsd_map_name_to_uid(argp->rqstp,
28e05dd8 318 buf, dummy32, &ace->who);
3c726023
BF		 319 if (status)
320 return status;
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);
47c85291
N		 338 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
339 return status;
1da177e4
LT		 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);
47c85291
N		 349 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
350 return status;
1da177e4
LT		 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 }
3c8e0316
YZ		 405 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
406 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
407 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
408 READ_BUF(expected_len - len);
409 else if (len != expected_len)
1da177e4
LT		 410 goto xdr_error;
411
412 DECODE_TAIL;
413
414out_nfserr:
b8dd7b9a 415 status = nfserrno(host_err);
1da177e4
LT		 416 goto out;
417}
418
e31a1b66
BH		 419static __be32
420nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
421{
422 DECODE_HEAD;
423
424 READ_BUF(sizeof(stateid_t));
425 READ32(sid->si_generation);
426 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
427
428 DECODE_TAIL;
429}
430
b37ad28b 431static __be32
1da177e4
LT		 432nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
433{
434 DECODE_HEAD;
435
436 READ_BUF(4);
437 READ32(access->ac_req_access);
438
439 DECODE_TAIL;
440}
441
1d1bc8f2
BF		 442static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
443{
444 DECODE_HEAD;
1d1bc8f2
BF		 445
446 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
447 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
448 READ32(bcts->dir);
6ce2357f
BS		 449 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
450 * could help us figure out we should be using it. */
1d1bc8f2
BF		 451 DECODE_TAIL;
452}
453
b37ad28b 454static __be32
1da177e4
LT		 455nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
456{
457 DECODE_HEAD;
458
e31a1b66 459 READ_BUF(4);
1da177e4 460 READ32(close->cl_seqid);
e31a1b66 461 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 462
463 DECODE_TAIL;
464}
465
466
b37ad28b 467static __be32
1da177e4
LT		 468nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
469{
470 DECODE_HEAD;
471
472 READ_BUF(12);
473 READ64(commit->co_offset);
474 READ32(commit->co_count);
475
476 DECODE_TAIL;
477}
478
b37ad28b 479static __be32
1da177e4
LT		 480nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
481{
482 DECODE_HEAD;
483
484 READ_BUF(4);
485 READ32(create->cr_type);
486 switch (create->cr_type) {
487 case NF4LNK:
488 READ_BUF(4);
489 READ32(create->cr_linklen);
490 READ_BUF(create->cr_linklen);
491 SAVEMEM(create->cr_linkname, create->cr_linklen);
492 break;
493 case NF4BLK:
494 case NF4CHR:
495 READ_BUF(8);
496 READ32(create->cr_specdata1);
497 READ32(create->cr_specdata2);
498 break;
499 case NF4SOCK:
500 case NF4FIFO:
501 case NF4DIR:
502 default:
503 break;
504 }
505
506 READ_BUF(4);
507 READ32(create->cr_namelen);
508 READ_BUF(create->cr_namelen);
509 SAVEMEM(create->cr_name, create->cr_namelen);
510 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
511 return status;
512
3c8e0316
YZ		 513 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
514 &create->cr_acl);
c0d6fc8a 515 if (status)
1da177e4
LT		 516 goto out;
517
518 DECODE_TAIL;
519}
520
b37ad28b 521static inline __be32
1da177e4
LT		 522nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
523{
e31a1b66 524 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 525}
526
b37ad28b 527static inline __be32
1da177e4
LT		 528nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
529{
530 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
531}
532
b37ad28b 533static __be32
1da177e4
LT		 534nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
535{
536 DECODE_HEAD;
537
538 READ_BUF(4);
539 READ32(link->li_namelen);
540 READ_BUF(link->li_namelen);
541 SAVEMEM(link->li_name, link->li_namelen);
542 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
543 return status;
544
545 DECODE_TAIL;
546}
547
b37ad28b 548static __be32
1da177e4
LT		 549nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
550{
551 DECODE_HEAD;
552
1da177e4
LT		 553 /*
554 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
555 */
556 READ_BUF(28);
557 READ32(lock->lk_type);
558 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
559 goto xdr_error;
560 READ32(lock->lk_reclaim);
561 READ64(lock->lk_offset);
562 READ64(lock->lk_length);
563 READ32(lock->lk_is_new);
564
565 if (lock->lk_is_new) {
e31a1b66 566 READ_BUF(4);
1da177e4 567 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 568 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
569 if (status)
570 return status;
571 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 572 READ32(lock->lk_new_lock_seqid);
573 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
574 READ32(lock->lk_new_owner.len);
575 READ_BUF(lock->lk_new_owner.len);
576 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
577 } else {
e31a1b66
BH		 578 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
579 if (status)
580 return status;
581 READ_BUF(4);
1da177e4
LT		 582 READ32(lock->lk_old_lock_seqid);
583 }
584
585 DECODE_TAIL;
586}
587
b37ad28b 588static __be32
1da177e4
LT		 589nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
590{
591 DECODE_HEAD;
592
593 READ_BUF(32);
594 READ32(lockt->lt_type);
595 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
596 goto xdr_error;
597 READ64(lockt->lt_offset);
598 READ64(lockt->lt_length);
599 COPYMEM(&lockt->lt_clientid, 8);
600 READ32(lockt->lt_owner.len);
601 READ_BUF(lockt->lt_owner.len);
602 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
603
604 DECODE_TAIL;
605}
606
b37ad28b 607static __be32
1da177e4
LT		 608nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
609{
610 DECODE_HEAD;
611
e31a1b66 612 READ_BUF(8);
1da177e4
LT		 613 READ32(locku->lu_type);
614 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
615 goto xdr_error;
616 READ32(locku->lu_seqid);
e31a1b66
BH		 617 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
618 if (status)
619 return status;
620 READ_BUF(16);
1da177e4
LT		 621 READ64(locku->lu_offset);
622 READ64(locku->lu_length);
623
624 DECODE_TAIL;
625}
626
b37ad28b 627static __be32
1da177e4
LT		 628nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
629{
630 DECODE_HEAD;
631
632 READ_BUF(4);
633 READ32(lookup->lo_len);
634 READ_BUF(lookup->lo_len);
635 SAVEMEM(lookup->lo_name, lookup->lo_len);
636 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
637 return status;
638
639 DECODE_TAIL;
640}
641
04f9e664
BF		 642static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *x)
643{
644 __be32 *p;
645 u32 w;
646
647 READ_BUF(4);
648 READ32(w);
649 *x = w;
650 switch (w & NFS4_SHARE_ACCESS_MASK) {
651 case NFS4_SHARE_ACCESS_READ:
652 case NFS4_SHARE_ACCESS_WRITE:
653 case NFS4_SHARE_ACCESS_BOTH:
654 break;
655 default:
656 return nfserr_bad_xdr;
657 }
658 w &= !NFS4_SHARE_ACCESS_MASK;
659 if (!w)
660 return nfs_ok;
661 if (!argp->minorversion)
662 return nfserr_bad_xdr;
663 switch (w & NFS4_SHARE_WANT_MASK) {
664 case NFS4_SHARE_WANT_NO_PREFERENCE:
665 case NFS4_SHARE_WANT_READ_DELEG:
666 case NFS4_SHARE_WANT_WRITE_DELEG:
667 case NFS4_SHARE_WANT_ANY_DELEG:
668 case NFS4_SHARE_WANT_NO_DELEG:
669 case NFS4_SHARE_WANT_CANCEL:
670 break;
671 default:
672 return nfserr_bad_xdr;
673 }
674 w &= !NFS4_SHARE_WANT_MASK;
675 if (!w)
676 return nfs_ok;
677 switch (w) {
678 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
679 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
680 return nfs_ok;
681 }
682xdr_error:
683 return nfserr_bad_xdr;
684}
685
686static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
687{
688 __be32 *p;
689
690 READ_BUF(4);
691 READ32(*x);
692 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 693 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 694 return nfserr_bad_xdr;
695 return nfs_ok;
696xdr_error:
697 return nfserr_bad_xdr;
698}
699
a084daf5
BF		 700static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
701{
702 __be32 *p;
703
704 READ_BUF(4);
705 READ32(o->len);
706
707 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
708 return nfserr_bad_xdr;
709
710 READ_BUF(o->len);
711 SAVEMEM(o->data, o->len);
712 return nfs_ok;
713xdr_error:
714 return nfserr_bad_xdr;
715}
716
b37ad28b 717static __be32
1da177e4
LT		 718nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
719{
720 DECODE_HEAD;
721
722 memset(open->op_bmval, 0, sizeof(open->op_bmval));
723 open->op_iattr.ia_valid = 0;
fe0750e5 724 open->op_openowner = NULL;
1da177e4
LT		 725
726 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 727 READ_BUF(4);
1da177e4 728 READ32(open->op_seqid);
04f9e664
BF		 729 status = nfsd4_decode_share_access(argp, &open->op_share_access);
730 if (status)
731 goto xdr_error;
732 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
733 if (status)
734 goto xdr_error;
a084daf5 735 READ_BUF(sizeof(clientid_t));
1da177e4 736 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 737 status = nfsd4_decode_opaque(argp, &open->op_owner);
738 if (status)
739 goto xdr_error;
740 READ_BUF(4);
1da177e4
LT		 741 READ32(open->op_create);
742 switch (open->op_create) {
743 case NFS4_OPEN_NOCREATE:
744 break;
745 case NFS4_OPEN_CREATE:
746 READ_BUF(4);
747 READ32(open->op_createmode);
748 switch (open->op_createmode) {
749 case NFS4_CREATE_UNCHECKED:
750 case NFS4_CREATE_GUARDED:
c0d6fc8a 751 status = nfsd4_decode_fattr(argp, open->op_bmval,
3c8e0316 752 &open->op_iattr, &open->op_acl);
c0d6fc8a 753 if (status)
1da177e4
LT		 754 goto out;
755 break;
756 case NFS4_CREATE_EXCLUSIVE:
757 READ_BUF(8);
758 COPYMEM(open->op_verf.data, 8);
759 break;
79fb54ab
BH		 760 case NFS4_CREATE_EXCLUSIVE4_1:
761 if (argp->minorversion < 1)
762 goto xdr_error;
763 READ_BUF(8);
764 COPYMEM(open->op_verf.data, 8);
765 status = nfsd4_decode_fattr(argp, open->op_bmval,
3c8e0316 766 &open->op_iattr, &open->op_acl);
79fb54ab
BH		 767 if (status)
768 goto out;
769 break;
1da177e4
LT		 770 default:
771 goto xdr_error;
772 }
773 break;
774 default:
775 goto xdr_error;
776 }
777
778 /* open_claim */
779 READ_BUF(4);
780 READ32(open->op_claim_type);
781 switch (open->op_claim_type) {
782 case NFS4_OPEN_CLAIM_NULL:
783 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
784 READ_BUF(4);
785 READ32(open->op_fname.len);
786 READ_BUF(open->op_fname.len);
787 SAVEMEM(open->op_fname.data, open->op_fname.len);
788 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
789 return status;
790 break;
791 case NFS4_OPEN_CLAIM_PREVIOUS:
792 READ_BUF(4);
793 READ32(open->op_delegate_type);
794 break;
795 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 796 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
797 if (status)
798 return status;
799 READ_BUF(4);
1da177e4
LT		 800 READ32(open->op_fname.len);
801 READ_BUF(open->op_fname.len);
802 SAVEMEM(open->op_fname.data, open->op_fname.len);
803 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
804 return status;
805 break;
8b289b2c
BF		 806 case NFS4_OPEN_CLAIM_FH:
807 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
808 if (argp->minorversion < 1)
809 goto xdr_error;
810 /* void */
811 break;
812 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
813 if (argp->minorversion < 1)
814 goto xdr_error;
815 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
816 if (status)
817 return status;
818 break;
1da177e4
LT		 819 default:
820 goto xdr_error;
821 }
822
823 DECODE_TAIL;
824}
825
b37ad28b 826static __be32
1da177e4
LT		 827nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
828{
829 DECODE_HEAD;
830
e31a1b66
BH		 831 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
832 if (status)
833 return status;
834 READ_BUF(4);
1da177e4
LT		 835 READ32(open_conf->oc_seqid);
836
837 DECODE_TAIL;
838}
839
b37ad28b 840static __be32
1da177e4
LT		 841nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
842{
843 DECODE_HEAD;
844
e31a1b66
BH		 845 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
846 if (status)
847 return status;
04f9e664 848 READ_BUF(4);
1da177e4 849 READ32(open_down->od_seqid);
04f9e664
BF		 850 status = nfsd4_decode_share_access(argp, &open_down->od_share_access);
851 if (status)
852 return status;
853 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
854 if (status)
855 return status;
1da177e4
LT		 856 DECODE_TAIL;
857}
858
b37ad28b 859static __be32
1da177e4
LT		 860nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
861{
862 DECODE_HEAD;
863
864 READ_BUF(4);
865 READ32(putfh->pf_fhlen);
866 if (putfh->pf_fhlen > NFS4_FHSIZE)
867 goto xdr_error;
868 READ_BUF(putfh->pf_fhlen);
869 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
870
871 DECODE_TAIL;
872}
873
b37ad28b 874static __be32
1da177e4
LT		 875nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
876{
877 DECODE_HEAD;
878
e31a1b66
BH		 879 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
880 if (status)
881 return status;
882 READ_BUF(12);
1da177e4
LT		 883 READ64(read->rd_offset);
884 READ32(read->rd_length);
885
886 DECODE_TAIL;
887}
888
b37ad28b 889static __be32
1da177e4
LT		 890nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
891{
892 DECODE_HEAD;
893
894 READ_BUF(24);
895 READ64(readdir->rd_cookie);
896 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
897 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
898 READ32(readdir->rd_maxcount);
899 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
900 goto out;
901
902 DECODE_TAIL;
903}
904
b37ad28b 905static __be32
1da177e4
LT		 906nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
907{
908 DECODE_HEAD;
909
910 READ_BUF(4);
911 READ32(remove->rm_namelen);
912 READ_BUF(remove->rm_namelen);
913 SAVEMEM(remove->rm_name, remove->rm_namelen);
914 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
915 return status;
916
917 DECODE_TAIL;
918}
919
b37ad28b 920static __be32
1da177e4
LT		 921nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
922{
923 DECODE_HEAD;
924
925 READ_BUF(4);
926 READ32(rename->rn_snamelen);
927 READ_BUF(rename->rn_snamelen + 4);
928 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
929 READ32(rename->rn_tnamelen);
930 READ_BUF(rename->rn_tnamelen);
931 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
932 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
933 return status;
934 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
935 return status;
936
937 DECODE_TAIL;
938}
939
b37ad28b 940static __be32
1da177e4
LT		 941nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
942{
943 DECODE_HEAD;
944
945 READ_BUF(sizeof(clientid_t));
946 COPYMEM(clientid, sizeof(clientid_t));
947
948 DECODE_TAIL;
949}
950
dcb488a3
AA		 951static __be32
952nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
953 struct nfsd4_secinfo *secinfo)
954{
955 DECODE_HEAD;
956
957 READ_BUF(4);
958 READ32(secinfo->si_namelen);
959 READ_BUF(secinfo->si_namelen);
960 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
961 status = check_filename(secinfo->si_name, secinfo->si_namelen,
962 nfserr_noent);
963 if (status)
964 return status;
965 DECODE_TAIL;
966}
967
04f4ad16
BF		 968static __be32
969nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
970 struct nfsd4_secinfo_no_name *sin)
971{
972 DECODE_HEAD;
973
974 READ_BUF(4);
975 READ32(sin->sin_style);
976 DECODE_TAIL;
977}
978
b37ad28b 979static __be32
1da177e4
LT		 980nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
981{
e31a1b66 982 __be32 status;
1da177e4 983
e31a1b66
BH		 984 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
985 if (status)
986 return status;
3c8e0316
YZ		 987 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
988 &setattr->sa_acl);
1da177e4
LT		 989}
990
b37ad28b 991static __be32
1da177e4
LT		 992nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
993{
994 DECODE_HEAD;
995
a084daf5 996 READ_BUF(8);
1da177e4 997 COPYMEM(setclientid->se_verf.data, 8);
1da177e4 998
a084daf5
BF		 999 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1000 if (status)
1001 return nfserr_bad_xdr;
1002 READ_BUF(8);
1da177e4
LT		 1003 READ32(setclientid->se_callback_prog);
1004 READ32(setclientid->se_callback_netid_len);
1005
1006 READ_BUF(setclientid->se_callback_netid_len + 4);
1007 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1008 READ32(setclientid->se_callback_addr_len);
1009
1010 READ_BUF(setclientid->se_callback_addr_len + 4);
1011 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1012 READ32(setclientid->se_callback_ident);
1013
1014 DECODE_TAIL;
1015}
1016
b37ad28b 1017static __be32
1da177e4
LT		 1018nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1019{
1020 DECODE_HEAD;
1021
1022 READ_BUF(8 + sizeof(nfs4_verifier));
1023 COPYMEM(&scd_c->sc_clientid, 8);
1024 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
1025
1026 DECODE_TAIL;
1027}
1028
1029/* Also used for NVERIFY */
b37ad28b 1030static __be32
1da177e4
LT		 1031nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1032{
1033#if 0
1034 struct nfsd4_compoundargs save = {
1035 .p = argp->p,
1036 .end = argp->end,
1037 .rqstp = argp->rqstp,
1038 };
1039 u32 ve_bmval[2];
1040 struct iattr ve_iattr; /* request */
1041 struct nfs4_acl *ve_acl; /* request */
1042#endif
1043 DECODE_HEAD;
1044
1045 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1046 goto out;
1047
1048 /* For convenience's sake, we compare raw xdr'd attributes in
1049 * nfsd4_proc_verify; however we still decode here just to return
1050 * correct error in case of bad xdr. */
1051#if 0
1052 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
1053 if (status == nfserr_inval) {
1054 status = nfserrno(status);
1055 goto out;
1056 }
1057#endif
1058 READ_BUF(4);
1059 READ32(verify->ve_attrlen);
1060 READ_BUF(verify->ve_attrlen);
1061 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1062
1063 DECODE_TAIL;
1064}
1065
b37ad28b 1066static __be32
1da177e4
LT		 1067nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1068{
1069 int avail;
1070 int v;
1071 int len;
1072 DECODE_HEAD;
1073
e31a1b66
BH		 1074 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1075 if (status)
1076 return status;
1077 READ_BUF(16);
1da177e4
LT		 1078 READ64(write->wr_offset);
1079 READ32(write->wr_stable_how);
1080 if (write->wr_stable_how > 2)
1081 goto xdr_error;
1082 READ32(write->wr_buflen);
1083
1084 /* Sorry .. no magic macros for this.. *
1085 * READ_BUF(write->wr_buflen);
1086 * SAVEMEM(write->wr_buf, write->wr_buflen);
1087 */
1088 avail = (char*)argp->end - (char*)argp->p;
1089 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1090 dprintk("NFSD: xdr error (%s:%d)\n",
1091 __FILE__, __LINE__);
1da177e4
LT		 1092 goto xdr_error;
1093 }
3cc03b16
N		 1094 argp->rqstp->rq_vec[0].iov_base = p;
1095 argp->rqstp->rq_vec[0].iov_len = avail;
1da177e4
LT		 1096 v = 0;
1097 len = write->wr_buflen;
3cc03b16
N		 1098 while (len > argp->rqstp->rq_vec[v].iov_len) {
1099 len -= argp->rqstp->rq_vec[v].iov_len;
1da177e4 1100 v++;
3cc03b16 1101 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1da177e4
LT		 1102 argp->pagelist++;
1103 if (argp->pagelen >= PAGE_SIZE) {
3cc03b16 1104 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1da177e4
LT		 1105 argp->pagelen -= PAGE_SIZE;
1106 } else {
3cc03b16 1107 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1da177e4
LT		 1108 argp->pagelen -= len;
1109 }
1110 }
2ebbc012
AV		 1111 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
1112 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
3cc03b16 1113 argp->rqstp->rq_vec[v].iov_len = len;
1da177e4
LT		 1114 write->wr_vlen = v+1;
1115
1116 DECODE_TAIL;
1117}
1118
b37ad28b 1119static __be32
1da177e4
LT		 1120nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1121{
1122 DECODE_HEAD;
1123
1124 READ_BUF(12);
1125 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1126 READ32(rlockowner->rl_owner.len);
1127 READ_BUF(rlockowner->rl_owner.len);
1128 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1129
60adfc50
AA		 1130 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1131 return nfserr_inval;
1da177e4
LT		 1132 DECODE_TAIL;
1133}
1134
2db134eb
AA		 1135static __be32
1136nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1137 struct nfsd4_exchange_id *exid)
2db134eb 1138{
5afa040b 1139 int dummy, tmp;
0733d213
AA		 1140 DECODE_HEAD;
1141
1142 READ_BUF(NFS4_VERIFIER_SIZE);
1143 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1144
a084daf5
BF		 1145 status = nfsd4_decode_opaque(argp, &exid->clname);
1146 if (status)
1147 return nfserr_bad_xdr;
0733d213
AA		 1148
1149 READ_BUF(4);
1150 READ32(exid->flags);
1151
1152 /* Ignore state_protect4_a */
1153 READ_BUF(4);
1154 READ32(exid->spa_how);
1155 switch (exid->spa_how) {
1156 case SP4_NONE:
1157 break;
1158 case SP4_MACH_CRED:
1159 /* spo_must_enforce */
1160 READ_BUF(4);
1161 READ32(dummy);
1162 READ_BUF(dummy * 4);
1163 p += dummy;
1164
1165 /* spo_must_allow */
1166 READ_BUF(4);
1167 READ32(dummy);
1168 READ_BUF(dummy * 4);
1169 p += dummy;
1170 break;
1171 case SP4_SSV:
1172 /* ssp_ops */
1173 READ_BUF(4);
1174 READ32(dummy);
1175 READ_BUF(dummy * 4);
1176 p += dummy;
1177
1178 READ_BUF(4);
1179 READ32(dummy);
1180 READ_BUF(dummy * 4);
1181 p += dummy;
1182
1183 /* ssp_hash_algs<> */
1184 READ_BUF(4);
5afa040b
MJ		 1185 READ32(tmp);
1186 while (tmp--) {
1187 READ_BUF(4);
1188 READ32(dummy);
1189 READ_BUF(dummy);
1190 p += XDR_QUADLEN(dummy);
1191 }
0733d213
AA		 1192
1193 /* ssp_encr_algs<> */
1194 READ_BUF(4);
5afa040b
MJ		 1195 READ32(tmp);
1196 while (tmp--) {
1197 READ_BUF(4);
1198 READ32(dummy);
1199 READ_BUF(dummy);
1200 p += XDR_QUADLEN(dummy);
1201 }
0733d213
AA		 1202
1203 /* ssp_window and ssp_num_gss_handles */
1204 READ_BUF(8);
1205 READ32(dummy);
1206 READ32(dummy);
1207 break;
1208 default:
1209 goto xdr_error;
1210 }
1211
1212 /* Ignore Implementation ID */
1213 READ_BUF(4); /* nfs_impl_id4 array length */
1214 READ32(dummy);
1215
1216 if (dummy > 1)
1217 goto xdr_error;
1218
1219 if (dummy == 1) {
1220 /* nii_domain */
1221 READ_BUF(4);
1222 READ32(dummy);
1223 READ_BUF(dummy);
1224 p += XDR_QUADLEN(dummy);
1225
1226 /* nii_name */
1227 READ_BUF(4);
1228 READ32(dummy);
1229 READ_BUF(dummy);
1230 p += XDR_QUADLEN(dummy);
1231
1232 /* nii_date */
1233 READ_BUF(12);
1234 p += 3;
1235 }
1236 DECODE_TAIL;
2db134eb
AA		 1237}
1238
1239static __be32
1240nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1241 struct nfsd4_create_session *sess)
1242{
ec6b5d7b
AA		 1243 DECODE_HEAD;
1244
1245 u32 dummy;
1246 char *machine_name;
5a02ab7c 1247 int i;
ec6b5d7b
AA		 1248 int nr_secflavs;
1249
1250 READ_BUF(16);
1251 COPYMEM(&sess->clientid, 8);
1252 READ32(sess->seqid);
1253 READ32(sess->flags);
1254
1255 /* Fore channel attrs */
1256 READ_BUF(28);
1257 READ32(dummy); /* headerpadsz is always 0 */
1258 READ32(sess->fore_channel.maxreq_sz);
1259 READ32(sess->fore_channel.maxresp_sz);
1260 READ32(sess->fore_channel.maxresp_cached);
1261 READ32(sess->fore_channel.maxops);
1262 READ32(sess->fore_channel.maxreqs);
1263 READ32(sess->fore_channel.nr_rdma_attrs);
1264 if (sess->fore_channel.nr_rdma_attrs == 1) {
1265 READ_BUF(4);
1266 READ32(sess->fore_channel.rdma_attrs);
1267 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1268 dprintk("Too many fore channel attr bitmaps!\n");
1269 goto xdr_error;
1270 }
1271
1272 /* Back channel attrs */
1273 READ_BUF(28);
1274 READ32(dummy); /* headerpadsz is always 0 */
1275 READ32(sess->back_channel.maxreq_sz);
1276 READ32(sess->back_channel.maxresp_sz);
1277 READ32(sess->back_channel.maxresp_cached);
1278 READ32(sess->back_channel.maxops);
1279 READ32(sess->back_channel.maxreqs);
1280 READ32(sess->back_channel.nr_rdma_attrs);
1281 if (sess->back_channel.nr_rdma_attrs == 1) {
1282 READ_BUF(4);
1283 READ32(sess->back_channel.rdma_attrs);
1284 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1285 dprintk("Too many back channel attr bitmaps!\n");
1286 goto xdr_error;
1287 }
1288
1289 READ_BUF(8);
1290 READ32(sess->callback_prog);
1291
1292 /* callback_sec_params4 */
1293 READ32(nr_secflavs);
1294 for (i = 0; i < nr_secflavs; ++i) {
1295 READ_BUF(4);
1296 READ32(dummy);
1297 switch (dummy) {
1298 case RPC_AUTH_NULL:
1299 /* Nothing to read */
1300 break;
1301 case RPC_AUTH_UNIX:
1302 READ_BUF(8);
1303 /* stamp */
1304 READ32(dummy);
1305
1306 /* machine name */
1307 READ32(dummy);
1308 READ_BUF(dummy);
1309 SAVEMEM(machine_name, dummy);
1310
1311 /* uid, gid */
1312 READ_BUF(8);
1313 READ32(sess->uid);
1314 READ32(sess->gid);
1315
1316 /* more gids */
1317 READ_BUF(4);
1318 READ32(dummy);
1319 READ_BUF(dummy * 4);
ec6b5d7b
AA		 1320 break;
1321 case RPC_AUTH_GSS:
1322 dprintk("RPC_AUTH_GSS callback secflavor "
1323 "not supported!\n");
1324 READ_BUF(8);
1325 /* gcbp_service */
1326 READ32(dummy);
1327 /* gcbp_handle_from_server */
1328 READ32(dummy);
1329 READ_BUF(dummy);
1330 p += XDR_QUADLEN(dummy);
1331 /* gcbp_handle_from_client */
1332 READ_BUF(4);
1333 READ32(dummy);
1334 READ_BUF(dummy);
ec6b5d7b
AA		 1335 break;
1336 default:
1337 dprintk("Illegal callback secflavor\n");
1338 return nfserr_inval;
1339 }
1340 }
1341 DECODE_TAIL;
2db134eb
AA		 1342}
1343
1344static __be32
1345nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1346 struct nfsd4_destroy_session *destroy_session)
1347{
e10e0cfc
BH		 1348 DECODE_HEAD;
1349 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1350 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1351
1352 DECODE_TAIL;
2db134eb
AA		 1353}
1354
e1ca12df
BS		 1355static __be32
1356nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1357 struct nfsd4_free_stateid *free_stateid)
1358{
1359 DECODE_HEAD;
1360
1361 READ_BUF(sizeof(stateid_t));
1362 READ32(free_stateid->fr_stateid.si_generation);
1363 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1364
1365 DECODE_TAIL;
1366}
1367
2db134eb
AA		 1368static __be32
1369nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1370 struct nfsd4_sequence *seq)
1371{
b85d4c01
BH		 1372 DECODE_HEAD;
1373
1374 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1375 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1376 READ32(seq->seqid);
1377 READ32(seq->slotid);
1378 READ32(seq->maxslots);
1379 READ32(seq->cachethis);
1380
1381 DECODE_TAIL;
2db134eb
AA		 1382}
1383
17456804
BS		 1384static __be32
1385nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1386{
1387 unsigned int nbytes;
1388 stateid_t si;
1389 int i;
1390 __be32 *p;
1391 __be32 status;
1392
1393 READ_BUF(4);
1394 test_stateid->ts_num_ids = ntohl(*p++);
1395
1396 nbytes = test_stateid->ts_num_ids * sizeof(stateid_t);
1397 if (nbytes > (u32)((char *)argp->end - (char *)argp->p))
1398 goto xdr_error;
1399
1400 test_stateid->ts_saved_args = argp;
1401 save_buf(argp, &test_stateid->ts_savedp);
1402
1403 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1404 status = nfsd4_decode_stateid(argp, &si);
1405 if (status)
1406 return status;
1407 }
1408
1409 status = 0;
1410out:
1411 return status;
1412xdr_error:
1413 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1414 status = nfserr_bad_xdr;
1415 goto out;
1416}
1417
4dc6ec00
BF		 1418static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1419{
1420 DECODE_HEAD;
1421
1422 READ_BUF(4);
1423 READ32(rc->rca_one_fs);
1424
1425 DECODE_TAIL;
1426}
1427
347e0ad9
BH		 1428static __be32
1429nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1430{
1431 return nfs_ok;
1432}
1433
3c375c6f
BH		 1434static __be32
1435nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1436{
1e685ec2 1437 return nfserr_notsupp;
3c375c6f
BH		 1438}
1439
347e0ad9
BH		 1440typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1441
1442static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1443 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1444 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1445 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1446 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1447 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1448 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1449 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1450 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1451 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1452 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1453 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1454 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1455 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1456 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1457 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1458 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1459 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1460 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1461 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1462 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
a1c8c4d1 1463 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
ad1060c8
BF		 1464 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1465 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1466 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1467 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1468 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1469 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1470 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1471 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1472 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1473 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1474 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1475 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1476 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1477 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1478 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1479 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
347e0ad9
BH		 1480};
1481
2db134eb 1482static nfsd4_dec nfsd41_dec_ops[] = {
9064caae
RD		 1483 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1484 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1485 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1486 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1487 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1488 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1489 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1490 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1491 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1492 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1493 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1494 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1495 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1496 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1497 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1498 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1499 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1500 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1501 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1502 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1503 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1504 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1505 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1506 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1507 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1508 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1509 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1510 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1511 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1512 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1513 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1514 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1515 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1516 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1517 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1518 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1519 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
2db134eb
AA		 1520
1521 /* new operations for NFSv4.1 */
9064caae 1522 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1d1bc8f2 1523 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1524 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1525 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1526 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1527 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1528 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1529 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1530 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1531 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1532 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1533 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1534 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1535 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1536 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1537 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae
RD		 1538 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1539 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
4dc6ec00 1540 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1541};
1542
f2feb96b
BH		 1543struct nfsd4_minorversion_ops {
1544 nfsd4_dec *decoders;
1545 int nops;
1546};
1547
1548static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
ad1060c8 1549 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
2db134eb 1550 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
f2feb96b
BH		 1551};
1552
b37ad28b 1553static __be32
1da177e4
LT		 1554nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1555{
1556 DECODE_HEAD;
1557 struct nfsd4_op *op;
f2feb96b 1558 struct nfsd4_minorversion_ops *ops;
1091006c 1559 bool cachethis = false;
1da177e4
LT		 1560 int i;
1561
1562 /*
1563 * XXX: According to spec, we should check the tag
1564 * for UTF-8 compliance. I'm postponing this for
1565 * now because it seems that some clients do use
1566 * binary tags.
1567 */
1568 READ_BUF(4);
1569 READ32(argp->taglen);
1570 READ_BUF(argp->taglen + 8);
1571 SAVEMEM(argp->tag, argp->taglen);
1572 READ32(argp->minorversion);
1573 READ32(argp->opcnt);
1574
1575 if (argp->taglen > NFSD4_MAX_TAGLEN)
1576 goto xdr_error;
1577 if (argp->opcnt > 100)
1578 goto xdr_error;
1579
e8c96f8c 1580 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1581 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1582 if (!argp->ops) {
1583 argp->ops = argp->iops;
817cb9d4 1584 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1585 goto xdr_error;
1586 }
1587 }
1588
f2feb96b 1589 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
30cff1ff
BH		 1590 argp->opcnt = 0;
1591
f2feb96b 1592 ops = &nfsd4_minorversion[argp->minorversion];
1da177e4
LT		 1593 for (i = 0; i < argp->opcnt; i++) {
1594 op = &argp->ops[i];
1595 op->replay = NULL;
1596
1597 /*
1598 * We can't use READ_BUF() here because we need to handle
1599 * a missing opcode as an OP_WRITE + 1. So we need to check
1600 * to see if we're truly at the end of our buffer or if there
1601 * is another page we need to flip to.
1602 */
1603
1604 if (argp->p == argp->end) {
1605 if (argp->pagelen < 4) {
1606 /* There isn't an opcode still on the wire */
1607 op->opnum = OP_WRITE + 1;
1608 op->status = nfserr_bad_xdr;
1609 argp->opcnt = i+1;
1610 break;
1611 }
1612
1613 /*
1614 * False alarm. We just hit a page boundary, but there
1615 * is still data available. Move pointer across page
1616 * boundary. *snip from READ_BUF*
1617 */
1618 argp->p = page_address(argp->pagelist[0]);
1619 argp->pagelist++;
1620 if (argp->pagelen < PAGE_SIZE) {
2bc3c117 1621 argp->end = argp->p + (argp->pagelen>>2);
1da177e4
LT		 1622 argp->pagelen = 0;
1623 } else {
2bc3c117 1624 argp->end = argp->p + (PAGE_SIZE>>2);
1da177e4
LT		 1625 argp->pagelen -= PAGE_SIZE;
1626 }
1627 }
1628 op->opnum = ntohl(*argp->p++);
1629
de3cab79 1630 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
f2feb96b 1631 op->status = ops->decoders[op->opnum](argp, &op->u);
347e0ad9 1632 else {
1da177e4
LT		 1633 op->opnum = OP_ILLEGAL;
1634 op->status = nfserr_op_illegal;
1da177e4
LT		 1635 }
1636
1637 if (op->status) {
1638 argp->opcnt = i+1;
1639 break;
1640 }
1091006c
BF		 1641 /*
1642 * We'll try to cache the result in the DRC if any one
1643 * op in the compound wants to be cached:
1644 */
1645 cachethis |= nfsd4_cache_this_op(op);
1da177e4 1646 }
1091006c
BF		 1647 /* Sessions make the DRC unnecessary: */
1648 if (argp->minorversion)
1649 cachethis = false;
1650 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4
LT		 1651
1652 DECODE_TAIL;
1653}
1da177e4 1654
1da177e4
LT		 1655#define WRITE32(n) *p++ = htonl(n)
1656#define WRITE64(n) do { \
1657 *p++ = htonl((u32)((n) >> 32)); \
1658 *p++ = htonl((u32)(n)); \
1659} while (0)
5108b276 1660#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1661 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1662 memcpy(p, ptr, nbytes); \
1663 p += XDR_QUADLEN(nbytes); \
5108b276 1664}} while (0)
c654b8a9
BF		 1665
1666static void write32(__be32 **p, u32 n)
1667{
1668 *(*p)++ = n;
1669}
1670
1671static void write64(__be32 **p, u64 n)
1672{
1673 write32(p, (u32)(n >> 32));
1674 write32(p, (u32)n);
1675}
1676
1677static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1678{
1679 if (IS_I_VERSION(inode)) {
1680 write64(p, inode->i_version);
1681 } else {
1682 write32(p, stat->ctime.tv_sec);
1683 write32(p, stat->ctime.tv_nsec);
1684 }
1685}
1686
1687static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1688{
1689 write32(p, c->atomic);
1690 if (c->change_supported) {
1691 write64(p, c->before_change);
1692 write64(p, c->after_change);
1693 } else {
1694 write32(p, c->before_ctime_sec);
1695 write32(p, c->before_ctime_nsec);
1696 write32(p, c->after_ctime_sec);
1697 write32(p, c->after_ctime_nsec);
1698 }
1699}
1da177e4
LT		 1700
1701#define RESERVE_SPACE(nbytes) do { \
1702 p = resp->p; \
1703 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1704} while (0)
1705#define ADJUST_ARGS() resp->p = p
1706
1707/*
1708 * Header routine to setup seqid operation replay cache
1709 */
1710#define ENCODE_SEQID_OP_HEAD \
2ebbc012 1711 __be32 *save; \
1da177e4
LT		 1712 \
1713 save = resp->p;
1714
1715/*
7fb64cee
N		 1716 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1717 * is where sequence id's are incremented, and the replay cache is filled.
1718 * Note that we increment sequence id's here, at the last moment, so we're sure
1719 * we know whether the error to be returned is a sequence id mutating error.
1da177e4
LT		 1720 */
1721
f3e42237
BF		 1722static void encode_seqid_op_tail(struct nfsd4_compoundres *resp, __be32 *save, __be32 nfserr)
1723{
1724 struct nfs4_stateowner *stateowner = resp->cstate.replay_owner;
1725
1726 if (seqid_mutating_err(ntohl(nfserr)) && stateowner) {
1727 stateowner->so_seqid++;
1728 stateowner->so_replay.rp_status = nfserr;
1729 stateowner->so_replay.rp_buflen =
1730 (char *)resp->p - (char *)save;
1731 memcpy(stateowner->so_replay.rp_buf, save,
1732 stateowner->so_replay.rp_buflen);
38c387b5 1733 nfsd4_purge_closed_stateid(stateowner);
f3e42237
BF		 1734 }
1735}
1da177e4 1736
81c3f413 1737/* Encode as an array of strings the string given with components
3ad2f3fb 1738 * separated @sep.
81c3f413 1739 */
b37ad28b 1740static __be32 nfsd4_encode_components(char sep, char *components,
2ebbc012 1741 __be32 **pp, int *buflen)
81c3f413 1742{
2ebbc012
AV		 1743 __be32 *p = *pp;
1744 __be32 *countp = p;
81c3f413
BF		 1745 int strlen, count=0;
1746 char *str, *end;
1747
1748 dprintk("nfsd4_encode_components(%s)\n", components);
1749 if ((*buflen -= 4) < 0)
1750 return nfserr_resource;
1751 WRITE32(0); /* We will fill this in with @count later */
1752 end = str = components;
1753 while (*end) {
1754 for (; *end && (*end != sep); end++)
1755 ; /* Point to end of component */
1756 strlen = end - str;
1757 if (strlen) {
1758 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1759 return nfserr_resource;
1760 WRITE32(strlen);
1761 WRITEMEM(str, strlen);
1762 count++;
1763 }
1764 else
1765 end++;
1766 str = end;
1767 }
1768 *pp = p;
1769 p = countp;
1770 WRITE32(count);
1771 return 0;
1772}
1773
1774/*
1775 * encode a location element of a fs_locations structure
1776 */
b37ad28b 1777static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1778 __be32 **pp, int *buflen)
81c3f413 1779{
b37ad28b 1780 __be32 status;
2ebbc012 1781 __be32 *p = *pp;
81c3f413
BF		 1782
1783 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1784 if (status)
1785 return status;
1786 status = nfsd4_encode_components('/', location->path, &p, buflen);
1787 if (status)
1788 return status;
1789 *pp = p;
1790 return 0;
1791}
1792
1793/*
ed748aac 1794 * Encode a path in RFC3530 'pathname4' format
81c3f413 1795 */
ed748aac
TM		 1796static __be32 nfsd4_encode_path(const struct path *root,
1797 const struct path *path, __be32 **pp, int *buflen)
81c3f413 1798{
ed748aac
TM		 1799 struct path cur = {
1800 .mnt = path->mnt,
1801 .dentry = path->dentry,
1802 };
1803 __be32 *p = *pp;
1804 struct dentry **components = NULL;
1805 unsigned int ncomponents = 0;
1806 __be32 err = nfserr_jukebox;
81c3f413 1807
ed748aac 1808 dprintk("nfsd4_encode_components(");
81c3f413 1809
ed748aac
TM		 1810 path_get(&cur);
1811 /* First walk the path up to the nfsd root, and store the
1812 * dentries/path components in an array.
1813 */
1814 for (;;) {
1815 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1816 break;
1817 if (cur.dentry == cur.mnt->mnt_root) {
1818 if (follow_up(&cur))
1819 continue;
1820 goto out_free;
1821 }
1822 if ((ncomponents & 15) == 0) {
1823 struct dentry **new;
1824 new = krealloc(components,
1825 sizeof(*new) * (ncomponents + 16),
1826 GFP_KERNEL);
1827 if (!new)
1828 goto out_free;
1829 components = new;
1830 }
1831 components[ncomponents++] = cur.dentry;
1832 cur.dentry = dget_parent(cur.dentry);
1833 }
81c3f413 1834
ed748aac
TM		 1835 *buflen -= 4;
1836 if (*buflen < 0)
1837 goto out_free;
1838 WRITE32(ncomponents);
1839
1840 while (ncomponents) {
1841 struct dentry *dentry = components[ncomponents - 1];
1842 unsigned int len = dentry->d_name.len;
1843
1844 *buflen -= 4 + (XDR_QUADLEN(len) << 2);
1845 if (*buflen < 0)
1846 goto out_free;
1847 WRITE32(len);
1848 WRITEMEM(dentry->d_name.name, len);
1849 dprintk("/%s", dentry->d_name.name);
1850 dput(dentry);
1851 ncomponents--;
81c3f413 1852 }
ed748aac
TM		 1853
1854 *pp = p;
1855 err = 0;
1856out_free:
1857 dprintk(")\n");
1858 while (ncomponents)
1859 dput(components[--ncomponents]);
1860 kfree(components);
1861 path_put(&cur);
1862 return err;
1863}
1864
1865static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
1866 const struct path *path, __be32 **pp, int *buflen)
1867{
1868 struct svc_export *exp_ps;
1869 __be32 res;
1870
1871 exp_ps = rqst_find_fsidzero_export(rqstp);
1872 if (IS_ERR(exp_ps))
1873 return nfserrno(PTR_ERR(exp_ps));
1874 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
1875 exp_put(exp_ps);
1876 return res;
81c3f413
BF		 1877}
1878
1879/*
1880 * encode a fs_locations structure
1881 */
b37ad28b 1882static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1883 struct svc_export *exp,
2ebbc012 1884 __be32 **pp, int *buflen)
81c3f413 1885{
b37ad28b 1886 __be32 status;
cc45f017 1887 int i;
2ebbc012 1888 __be32 *p = *pp;
81c3f413 1889 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1890
ed748aac 1891 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
81c3f413
BF		 1892 if (status)
1893 return status;
1894 if ((*buflen -= 4) < 0)
1895 return nfserr_resource;
1896 WRITE32(fslocs->locations_count);
1897 for (i=0; i<fslocs->locations_count; i++) {
1898 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1899 &p, buflen);
1900 if (status)
1901 return status;
1902 }
1903 *pp = p;
1904 return 0;
1905}
1da177e4 1906
3d2544b1
BF		 1907static u32 nfs4_file_type(umode_t mode)
1908{
1909 switch (mode & S_IFMT) {
1910 case S_IFIFO: return NF4FIFO;
1911 case S_IFCHR: return NF4CHR;
1912 case S_IFDIR: return NF4DIR;
1913 case S_IFBLK: return NF4BLK;
1914 case S_IFLNK: return NF4LNK;
1915 case S_IFREG: return NF4REG;
1916 case S_IFSOCK: return NF4SOCK;
1917 default: return NF4BAD;
1918 };
1919}
1da177e4 1920
b37ad28b 1921static __be32
1da177e4 1922nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1923 __be32 **p, int *buflen)
1da177e4
LT		 1924{
1925 int status;
1926
1927 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1928 return nfserr_resource;
1929 if (whotype != NFS4_ACL_WHO_NAMED)
1930 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1931 else if (group)
1932 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1933 else
1934 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1935 if (status < 0)
1936 return nfserrno(status);
1937 *p = xdr_encode_opaque(*p, NULL, status);
1938 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1939 BUG_ON(*buflen < 0);
1940 return 0;
1941}
1942
b37ad28b 1943static inline __be32
2ebbc012 1944nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1da177e4
LT		 1945{
1946 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1947}
1948
b37ad28b 1949static inline __be32
2ebbc012 1950nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1da177e4
LT		 1951{
1952 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1953}
1954
b37ad28b 1955static inline __be32
1da177e4 1956nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2ebbc012 1957 __be32 **p, int *buflen)
1da177e4
LT		 1958{
1959 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1960}
1961
42ca0993
BF		 1962#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1963 FATTR4_WORD0_RDATTR_ERROR)
1964#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1965
b37ad28b 1966static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 1967{
1968 /* As per referral draft: */
1969 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1970 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1971 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1972 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1973 *rdattr_err = NFSERR_MOVED;
1974 else
1975 return nfserr_moved;
1976 }
1977 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1978 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1979 return 0;
1980}
1da177e4
LT		 1981
1982/*
1983 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1984 * ourselves.
1985 *
1986 * @countp is the buffer size in _words_; upon successful return this becomes
1987 * replaced with the number of words written.
1988 */
b37ad28b 1989__be32
1da177e4 1990nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2ebbc012 1991 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
406a7ea9 1992 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 1993{
1994 u32 bmval0 = bmval[0];
1995 u32 bmval1 = bmval[1];
7e705706 1996 u32 bmval2 = bmval[2];
1da177e4
LT		 1997 struct kstat stat;
1998 struct svc_fh tempfh;
1999 struct kstatfs statfs;
2000 int buflen = *countp << 2;
2ebbc012 2001 __be32 *attrlenp;
1da177e4
LT		 2002 u32 dummy;
2003 u64 dummy64;
42ca0993 2004 u32 rdattr_err = 0;
2ebbc012 2005 __be32 *p = buffer;
b37ad28b 2006 __be32 status;
b8dd7b9a 2007 int err;
1da177e4
LT		 2008 int aclsupport = 0;
2009 struct nfs4_acl *acl = NULL;
7e705706
AA		 2010 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2011 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2012 struct path path = {
2013 .mnt = exp->ex_path.mnt,
2014 .dentry = dentry,
2015 };
1da177e4
LT		 2016
2017 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2018 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2019 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2020 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2021
42ca0993 2022 if (exp->ex_fslocs.migrated) {
7e705706 2023 BUG_ON(bmval[2]);
42ca0993
BF		 2024 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2025 if (status)
2026 goto out;
2027 }
2028
54775491 2029 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
b8dd7b9a 2030 if (err)
1da177e4 2031 goto out_nfserr;
a16e92ed
BF		 2032 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2033 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2034 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2035 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2036 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2037 if (err)
1da177e4
LT		 2038 goto out_nfserr;
2039 }
2040 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2041 fh_init(&tempfh, NFS4_FHSIZE);
2042 status = fh_compose(&tempfh, exp, dentry, NULL);
2043 if (status)
2044 goto out;
2045 fhp = &tempfh;
2046 }
2047 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2048 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2049 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2050 aclsupport = (err == 0);
1da177e4 2051 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2052 if (err == -EOPNOTSUPP)
1da177e4 2053 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2054 else if (err == -EINVAL) {
1da177e4
LT		 2055 status = nfserr_attrnotsupp;
2056 goto out;
b8dd7b9a 2057 } else if (err != 0)
1da177e4
LT		 2058 goto out_nfserr;
2059 }
2060 }
1da177e4 2061
2b44f1ba
BH		 2062 if (bmval2) {
2063 if ((buflen -= 16) < 0)
2064 goto out_resource;
7e705706
AA		 2065 WRITE32(3);
2066 WRITE32(bmval0);
2067 WRITE32(bmval1);
2068 WRITE32(bmval2);
2b44f1ba
BH		 2069 } else if (bmval1) {
2070 if ((buflen -= 12) < 0)
2071 goto out_resource;
7e705706
AA		 2072 WRITE32(2);
2073 WRITE32(bmval0);
2074 WRITE32(bmval1);
2075 } else {
2b44f1ba
BH		 2076 if ((buflen -= 8) < 0)
2077 goto out_resource;
7e705706
AA		 2078 WRITE32(1);
2079 WRITE32(bmval0);
2080 }
1da177e4
LT		 2081 attrlenp = p++; /* to be backfilled later */
2082
2083 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2084 u32 word0 = nfsd_suppattrs0(minorversion);
2085 u32 word1 = nfsd_suppattrs1(minorversion);
2086 u32 word2 = nfsd_suppattrs2(minorversion);
2087
42ca0993
BF		 2088 if (!aclsupport)
2089 word0 &= ~FATTR4_WORD0_ACL;
7e705706 2090 if (!word2) {
2b44f1ba
BH		 2091 if ((buflen -= 12) < 0)
2092 goto out_resource;
7e705706
AA		 2093 WRITE32(2);
2094 WRITE32(word0);
2095 WRITE32(word1);
2096 } else {
2b44f1ba
BH		 2097 if ((buflen -= 16) < 0)
2098 goto out_resource;
7e705706
AA		 2099 WRITE32(3);
2100 WRITE32(word0);
2101 WRITE32(word1);
2102 WRITE32(word2);
2103 }
1da177e4
LT		 2104 }
2105 if (bmval0 & FATTR4_WORD0_TYPE) {
2106 if ((buflen -= 4) < 0)
2107 goto out_resource;
3d2544b1 2108 dummy = nfs4_file_type(stat.mode);
1da177e4
LT		 2109 if (dummy == NF4BAD)
2110 goto out_serverfault;
2111 WRITE32(dummy);
2112 }
2113 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2114 if ((buflen -= 4) < 0)
2115 goto out_resource;
49640001 2116 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 2117 WRITE32(NFS4_FH_PERSISTENT);
49640001 2118 else
e34ac862 2119 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 2120 }
2121 if (bmval0 & FATTR4_WORD0_CHANGE) {
1da177e4
LT		 2122 if ((buflen -= 8) < 0)
2123 goto out_resource;
c654b8a9 2124 write_change(&p, &stat, dentry->d_inode);
1da177e4
LT		 2125 }
2126 if (bmval0 & FATTR4_WORD0_SIZE) {
2127 if ((buflen -= 8) < 0)
2128 goto out_resource;
2129 WRITE64(stat.size);
2130 }
2131 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2132 if ((buflen -= 4) < 0)
2133 goto out_resource;
2134 WRITE32(1);
2135 }
2136 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2137 if ((buflen -= 4) < 0)
2138 goto out_resource;
2139 WRITE32(1);
2140 }
2141 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2142 if ((buflen -= 4) < 0)
2143 goto out_resource;
2144 WRITE32(0);
2145 }
2146 if (bmval0 & FATTR4_WORD0_FSID) {
2147 if ((buflen -= 16) < 0)
2148 goto out_resource;
42ca0993
BF		 2149 if (exp->ex_fslocs.migrated) {
2150 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2151 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2152 } else switch(fsid_source(fhp)) {
2153 case FSIDSOURCE_FSID:
1da177e4
LT		 2154 WRITE64((u64)exp->ex_fsid);
2155 WRITE64((u64)0);
af6a4e28
N		 2156 break;
2157 case FSIDSOURCE_DEV:
1da177e4
LT		 2158 WRITE32(0);
2159 WRITE32(MAJOR(stat.dev));
2160 WRITE32(0);
2161 WRITE32(MINOR(stat.dev));
af6a4e28
N		 2162 break;
2163 case FSIDSOURCE_UUID:
2164 WRITEMEM(exp->ex_uuid, 16);
2165 break;
1da177e4
LT		 2166 }
2167 }
2168 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2169 if ((buflen -= 4) < 0)
2170 goto out_resource;
2171 WRITE32(0);
2172 }
2173 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2174 if ((buflen -= 4) < 0)
2175 goto out_resource;
cf07d2ea 2176 WRITE32(nfsd4_lease);
1da177e4
LT		 2177 }
2178 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2179 if ((buflen -= 4) < 0)
2180 goto out_resource;
42ca0993 2181 WRITE32(rdattr_err);
1da177e4
LT		 2182 }
2183 if (bmval0 & FATTR4_WORD0_ACL) {
2184 struct nfs4_ace *ace;
1da177e4
LT		 2185
2186 if (acl == NULL) {
2187 if ((buflen -= 4) < 0)
2188 goto out_resource;
2189
2190 WRITE32(0);
2191 goto out_acl;
2192 }
2193 if ((buflen -= 4) < 0)
2194 goto out_resource;
2195 WRITE32(acl->naces);
2196
28e05dd8 2197 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 2198 if ((buflen -= 4*3) < 0)
2199 goto out_resource;
2200 WRITE32(ace->type);
2201 WRITE32(ace->flag);
2202 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
2203 status = nfsd4_encode_aclname(rqstp, ace->whotype,
2204 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
2205 &p, &buflen);
2206 if (status == nfserr_resource)
2207 goto out_resource;
2208 if (status)
2209 goto out;
2210 }
2211 }
2212out_acl:
2213 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2214 if ((buflen -= 4) < 0)
2215 goto out_resource;
2216 WRITE32(aclsupport ?
2217 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2218 }
2219 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2220 if ((buflen -= 4) < 0)
2221 goto out_resource;
2222 WRITE32(1);
2223 }
2224 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2225 if ((buflen -= 4) < 0)
2226 goto out_resource;
2227 WRITE32(1);
2228 }
2229 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2230 if ((buflen -= 4) < 0)
2231 goto out_resource;
2232 WRITE32(1);
2233 }
2234 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2235 if ((buflen -= 4) < 0)
2236 goto out_resource;
2237 WRITE32(1);
2238 }
2239 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2240 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2241 if (buflen < 0)
2242 goto out_resource;
2243 WRITE32(fhp->fh_handle.fh_size);
2244 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2245 }
2246 if (bmval0 & FATTR4_WORD0_FILEID) {
2247 if ((buflen -= 8) < 0)
2248 goto out_resource;
40ee5dc6 2249 WRITE64(stat.ino);
1da177e4
LT		 2250 }
2251 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2252 if ((buflen -= 8) < 0)
2253 goto out_resource;
2254 WRITE64((u64) statfs.f_ffree);
2255 }
2256 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2257 if ((buflen -= 8) < 0)
2258 goto out_resource;
2259 WRITE64((u64) statfs.f_ffree);
2260 }
2261 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2262 if ((buflen -= 8) < 0)
2263 goto out_resource;
2264 WRITE64((u64) statfs.f_files);
2265 }
81c3f413
BF		 2266 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2267 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2268 if (status == nfserr_resource)
2269 goto out_resource;
2270 if (status)
2271 goto out;
2272 }
1da177e4
LT		 2273 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2274 if ((buflen -= 4) < 0)
2275 goto out_resource;
2276 WRITE32(1);
2277 }
2278 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2279 if ((buflen -= 8) < 0)
2280 goto out_resource;
2281 WRITE64(~(u64)0);
2282 }
2283 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2284 if ((buflen -= 4) < 0)
2285 goto out_resource;
2286 WRITE32(255);
2287 }
2288 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2289 if ((buflen -= 4) < 0)
2290 goto out_resource;
a16e92ed 2291 WRITE32(statfs.f_namelen);
1da177e4
LT		 2292 }
2293 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2294 if ((buflen -= 8) < 0)
2295 goto out_resource;
7adae489 2296 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2297 }
2298 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2299 if ((buflen -= 8) < 0)
2300 goto out_resource;
7adae489 2301 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2302 }
2303 if (bmval1 & FATTR4_WORD1_MODE) {
2304 if ((buflen -= 4) < 0)
2305 goto out_resource;
2306 WRITE32(stat.mode & S_IALLUGO);
2307 }
2308 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2309 if ((buflen -= 4) < 0)
2310 goto out_resource;
2311 WRITE32(1);
2312 }
2313 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2314 if ((buflen -= 4) < 0)
2315 goto out_resource;
2316 WRITE32(stat.nlink);
2317 }
2318 if (bmval1 & FATTR4_WORD1_OWNER) {
2319 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2320 if (status == nfserr_resource)
2321 goto out_resource;
2322 if (status)
2323 goto out;
2324 }
2325 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2326 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2327 if (status == nfserr_resource)
2328 goto out_resource;
2329 if (status)
2330 goto out;
2331 }
2332 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2333 if ((buflen -= 8) < 0)
2334 goto out_resource;
2335 WRITE32((u32) MAJOR(stat.rdev));
2336 WRITE32((u32) MINOR(stat.rdev));
2337 }
2338 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2339 if ((buflen -= 8) < 0)
2340 goto out_resource;
2341 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2342 WRITE64(dummy64);
2343 }
2344 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2345 if ((buflen -= 8) < 0)
2346 goto out_resource;
2347 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2348 WRITE64(dummy64);
2349 }
2350 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2351 if ((buflen -= 8) < 0)
2352 goto out_resource;
2353 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2354 WRITE64(dummy64);
2355 }
2356 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2357 if ((buflen -= 8) < 0)
2358 goto out_resource;
2359 dummy64 = (u64)stat.blocks << 9;
2360 WRITE64(dummy64);
2361 }
2362 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2363 if ((buflen -= 12) < 0)
2364 goto out_resource;
2365 WRITE32(0);
2366 WRITE32(stat.atime.tv_sec);
2367 WRITE32(stat.atime.tv_nsec);
2368 }
2369 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2370 if ((buflen -= 12) < 0)
2371 goto out_resource;
2372 WRITE32(0);
2373 WRITE32(1);
2374 WRITE32(0);
2375 }
2376 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2377 if ((buflen -= 12) < 0)
2378 goto out_resource;
2379 WRITE32(0);
2380 WRITE32(stat.ctime.tv_sec);
2381 WRITE32(stat.ctime.tv_nsec);
2382 }
2383 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2384 if ((buflen -= 12) < 0)
2385 goto out_resource;
2386 WRITE32(0);
2387 WRITE32(stat.mtime.tv_sec);
2388 WRITE32(stat.mtime.tv_nsec);
2389 }
2390 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 2391 if ((buflen -= 8) < 0)
2392 goto out_resource;
406a7ea9
FF		 2393 /*
2394 * Get parent's attributes if not ignoring crossmount
2395 * and this is the root of a cross-mounted filesystem.
2396 */
2397 if (ignore_crossmnt == 0 &&
462d6057
AV		 2398 dentry == exp->ex_path.mnt->mnt_root) {
2399 struct path path = exp->ex_path;
2400 path_get(&path);
2401 while (follow_up(&path)) {
2402 if (path.dentry != path.mnt->mnt_root)
2403 break;
2404 }
2405 err = vfs_getattr(path.mnt, path.dentry, &stat);
2406 path_put(&path);
40ee5dc6
PS		 2407 if (err)
2408 goto out_nfserr;
2409 }
2410 WRITE64(stat.ino);
1da177e4 2411 }
8c18f205
BH		 2412 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2413 WRITE32(3);
2414 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2415 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2416 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2417 }
7e705706 2418
1da177e4
LT		 2419 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2420 *countp = p - buffer;
2421 status = nfs_ok;
2422
2423out:
28e05dd8 2424 kfree(acl);
1da177e4
LT		 2425 if (fhp == &tempfh)
2426 fh_put(&tempfh);
2427 return status;
2428out_nfserr:
b8dd7b9a 2429 status = nfserrno(err);
1da177e4
LT		 2430 goto out;
2431out_resource:
2432 *countp = 0;
2433 status = nfserr_resource;
2434 goto out;
2435out_serverfault:
2436 status = nfserr_serverfault;
2437 goto out;
2438}
2439
c0ce6ec8
BF		 2440static inline int attributes_need_mount(u32 *bmval)
2441{
2442 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2443 return 1;
2444 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2445 return 1;
2446 return 0;
2447}
2448
b37ad28b 2449static __be32
1da177e4 2450nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2ebbc012 2451 const char *name, int namlen, __be32 *p, int *buflen)
1da177e4
LT		 2452{
2453 struct svc_export *exp = cd->rd_fhp->fh_export;
2454 struct dentry *dentry;
b37ad28b 2455 __be32 nfserr;
406a7ea9 2456 int ignore_crossmnt = 0;
1da177e4
LT		 2457
2458 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2459 if (IS_ERR(dentry))
2460 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2461 if (!dentry->d_inode) {
2462 /*
2463 * nfsd_buffered_readdir drops the i_mutex between
2464 * readdir and calling this callback, leaving a window
2465 * where this directory entry could have gone away.
2466 */
2467 dput(dentry);
2468 return nfserr_noent;
2469 }
1da177e4
LT		 2470
2471 exp_get(exp);
406a7ea9
FF		 2472 /*
2473 * In the case of a mountpoint, the client may be asking for
2474 * attributes that are only properties of the underlying filesystem
2475 * as opposed to the cross-mounted file system. In such a case,
2476 * we will not follow the cross mount and will fill the attribtutes
2477 * directly from the mountpoint dentry.
2478 */
3227fa41 2479 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2480 int err;
2481
3227fa41
BF		 2482 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2483 && !attributes_need_mount(cd->rd_bmval)) {
2484 ignore_crossmnt = 1;
2485 goto out_encode;
2486 }
dcb488a3
AA		 2487 /*
2488 * Why the heck aren't we just using nfsd_lookup??
2489 * Different "."/".." handling? Something else?
2490 * At least, add a comment here to explain....
2491 */
021d3a72
BF		 2492 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2493 if (err) {
2494 nfserr = nfserrno(err);
1da177e4
LT		 2495 goto out_put;
2496 }
dcb488a3
AA		 2497 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2498 if (nfserr)
2499 goto out_put;
1da177e4
LT		 2500
2501 }
3227fa41 2502out_encode:
1da177e4 2503 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 2504 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2505out_put:
2506 dput(dentry);
2507 exp_put(exp);
2508 return nfserr;
2509}
2510
2ebbc012 2511static __be32 *
b37ad28b 2512nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2513{
2ebbc012 2514 __be32 *attrlenp;
1da177e4
LT		 2515
2516 if (buflen < 6)
2517 return NULL;
2518 *p++ = htonl(2);
2519 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2520 *p++ = htonl(0); /* bmval1 */
2521
2522 attrlenp = p++;
2523 *p++ = nfserr; /* no htonl */
2524 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2525 return p;
2526}
2527
2528static int
a0ad13ef
N		 2529nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2530 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2531{
a0ad13ef 2532 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2533 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2534 int buflen;
2ebbc012 2535 __be32 *p = cd->buffer;
b2c0cea6 2536 __be32 *cookiep;
b37ad28b 2537 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2538
2539 /* In nfsv4, "." and ".." never make it onto the wire.. */
2540 if (name && isdotent(name, namlen)) {
2541 cd->common.err = nfs_ok;
2542 return 0;
2543 }
2544
2545 if (cd->offset)
2546 xdr_encode_hyper(cd->offset, (u64) offset);
2547
2548 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2549 if (buflen < 0)
2550 goto fail;
2551
2552 *p++ = xdr_one; /* mark entry present */
b2c0cea6 2553 cookiep = p;
1da177e4
LT		 2554 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2555 p = xdr_encode_array(p, name, namlen); /* name length & name */
2556
2557 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2558 switch (nfserr) {
2559 case nfs_ok:
2560 p += buflen;
2561 break;
2562 case nfserr_resource:
2563 nfserr = nfserr_toosmall;
2564 goto fail;
b2c0cea6
BF		 2565 case nfserr_noent:
2566 goto skip_entry;
1da177e4
LT		 2567 default:
2568 /*
2569 * If the client requested the RDATTR_ERROR attribute,
2570 * we stuff the error code into this attribute
2571 * and continue. If this attribute was not requested,
2572 * then in accordance with the spec, we fail the
2573 * entire READDIR operation(!)
2574 */
2575 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2576 goto fail;
1da177e4 2577 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2578 if (p == NULL) {
2579 nfserr = nfserr_toosmall;
1da177e4 2580 goto fail;
34081efc 2581 }
1da177e4
LT		 2582 }
2583 cd->buflen -= (p - cd->buffer);
2584 cd->buffer = p;
b2c0cea6
BF		 2585 cd->offset = cookiep;
2586skip_entry:
1da177e4
LT		 2587 cd->common.err = nfs_ok;
2588 return 0;
2589fail:
2590 cd->common.err = nfserr;
2591 return -EINVAL;
2592}
2593
e2f282b9
BH		 2594static void
2595nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2596{
bc749ca4 2597 __be32 *p;
e2f282b9
BH		 2598
2599 RESERVE_SPACE(sizeof(stateid_t));
2600 WRITE32(sid->si_generation);
2601 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2602 ADJUST_ARGS();
2603}
2604
695e12f8 2605static __be32
b37ad28b 2606nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2607{
bc749ca4 2608 __be32 *p;
1da177e4
LT		 2609
2610 if (!nfserr) {
2611 RESERVE_SPACE(8);
2612 WRITE32(access->ac_supported);
2613 WRITE32(access->ac_resp_access);
2614 ADJUST_ARGS();
2615 }
695e12f8 2616 return nfserr;
1da177e4
LT		 2617}
2618
1d1bc8f2
BF		 2619static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2620{
2621 __be32 *p;
2622
2623 if (!nfserr) {
2624 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2625 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2626 WRITE32(bcts->dir);
2627 /* XXX: ? */
2628 WRITE32(0);
2629 ADJUST_ARGS();
2630 }
2631 return nfserr;
2632}
2633
695e12f8 2634static __be32
b37ad28b 2635nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4
LT		 2636{
2637 ENCODE_SEQID_OP_HEAD;
2638
e2f282b9
BH		 2639 if (!nfserr)
2640 nfsd4_encode_stateid(resp, &close->cl_stateid);
2641
f3e42237 2642 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2643 return nfserr;
1da177e4
LT		 2644}
2645
2646
695e12f8 2647static __be32
b37ad28b 2648nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2649{
bc749ca4 2650 __be32 *p;
1da177e4
LT		 2651
2652 if (!nfserr) {
2653 RESERVE_SPACE(8);
2654 WRITEMEM(commit->co_verf.data, 8);
2655 ADJUST_ARGS();
2656 }
695e12f8 2657 return nfserr;
1da177e4
LT		 2658}
2659
695e12f8 2660static __be32
b37ad28b 2661nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2662{
bc749ca4 2663 __be32 *p;
1da177e4
LT		 2664
2665 if (!nfserr) {
2666 RESERVE_SPACE(32);
c654b8a9 2667 write_cinfo(&p, &create->cr_cinfo);
1da177e4
LT		 2668 WRITE32(2);
2669 WRITE32(create->cr_bmval[0]);
2670 WRITE32(create->cr_bmval[1]);
2671 ADJUST_ARGS();
2672 }
695e12f8 2673 return nfserr;
1da177e4
LT		 2674}
2675
b37ad28b
AV		 2676static __be32
2677nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2678{
2679 struct svc_fh *fhp = getattr->ga_fhp;
2680 int buflen;
2681
2682 if (nfserr)
2683 return nfserr;
2684
2685 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2686 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2687 resp->p, &buflen, getattr->ga_bmval,
406a7ea9 2688 resp->rqstp, 0);
1da177e4
LT		 2689 if (!nfserr)
2690 resp->p += buflen;
2691 return nfserr;
2692}
2693
695e12f8
BH		 2694static __be32
2695nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2696{
695e12f8 2697 struct svc_fh *fhp = *fhpp;
1da177e4 2698 unsigned int len;
bc749ca4 2699 __be32 *p;
1da177e4
LT		 2700
2701 if (!nfserr) {
2702 len = fhp->fh_handle.fh_size;
2703 RESERVE_SPACE(len + 4);
2704 WRITE32(len);
2705 WRITEMEM(&fhp->fh_handle.fh_base, len);
2706 ADJUST_ARGS();
2707 }
695e12f8 2708 return nfserr;
1da177e4
LT		 2709}
2710
2711/*
2712* Including all fields other than the name, a LOCK4denied structure requires
2713* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2714*/
2715static void
2716nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2717{
7c13f344 2718 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2719 __be32 *p;
1da177e4 2720
7c13f344 2721 RESERVE_SPACE(32 + XDR_LEN(conf->len));
1da177e4
LT		 2722 WRITE64(ld->ld_start);
2723 WRITE64(ld->ld_length);
2724 WRITE32(ld->ld_type);
7c13f344 2725 if (conf->len) {
1da177e4 2726 WRITEMEM(&ld->ld_clientid, 8);
7c13f344
BF		 2727 WRITE32(conf->len);
2728 WRITEMEM(conf->data, conf->len);
2729 kfree(conf->data);
1da177e4
LT		 2730 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2731 WRITE64((u64)0); /* clientid */
2732 WRITE32(0); /* length of owner name */
2733 }
2734 ADJUST_ARGS();
2735}
2736
695e12f8 2737static __be32
b37ad28b 2738nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2739{
1da177e4
LT		 2740 ENCODE_SEQID_OP_HEAD;
2741
e2f282b9
BH		 2742 if (!nfserr)
2743 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2744 else if (nfserr == nfserr_denied)
1da177e4
LT		 2745 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2746
f3e42237 2747 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2748 return nfserr;
1da177e4
LT		 2749}
2750
695e12f8 2751static __be32
b37ad28b 2752nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2753{
2754 if (nfserr == nfserr_denied)
2755 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2756 return nfserr;
1da177e4
LT		 2757}
2758
695e12f8 2759static __be32
b37ad28b 2760nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4
LT		 2761{
2762 ENCODE_SEQID_OP_HEAD;
2763
e2f282b9
BH		 2764 if (!nfserr)
2765 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2766
f3e42237 2767 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2768 return nfserr;
1da177e4
LT		 2769}
2770
2771
695e12f8 2772static __be32
b37ad28b 2773nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2774{
bc749ca4 2775 __be32 *p;
1da177e4
LT		 2776
2777 if (!nfserr) {
2778 RESERVE_SPACE(20);
c654b8a9 2779 write_cinfo(&p, &link->li_cinfo);
1da177e4
LT		 2780 ADJUST_ARGS();
2781 }
695e12f8 2782 return nfserr;
1da177e4
LT		 2783}
2784
2785
695e12f8 2786static __be32
b37ad28b 2787nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2788{
bc749ca4 2789 __be32 *p;
1da177e4
LT		 2790 ENCODE_SEQID_OP_HEAD;
2791
2792 if (nfserr)
2793 goto out;
2794
e2f282b9
BH		 2795 nfsd4_encode_stateid(resp, &open->op_stateid);
2796 RESERVE_SPACE(40);
c654b8a9 2797 write_cinfo(&p, &open->op_cinfo);
1da177e4
LT		 2798 WRITE32(open->op_rflags);
2799 WRITE32(2);
2800 WRITE32(open->op_bmval[0]);
2801 WRITE32(open->op_bmval[1]);
2802 WRITE32(open->op_delegate_type);
2803 ADJUST_ARGS();
2804
2805 switch (open->op_delegate_type) {
2806 case NFS4_OPEN_DELEGATE_NONE:
2807 break;
2808 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2809 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2810 RESERVE_SPACE(20);
7b190fec 2811 WRITE32(open->op_recall);
1da177e4
LT		 2812
2813 /*
2814 * TODO: ACE's in delegations
2815 */
2816 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2817 WRITE32(0);
2818 WRITE32(0);
2819 WRITE32(0); /* XXX: is NULL principal ok? */
2820 ADJUST_ARGS();
2821 break;
2822 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2823 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2824 RESERVE_SPACE(32);
1da177e4
LT		 2825 WRITE32(0);
2826
2827 /*
2828 * TODO: space_limit's in delegations
2829 */
2830 WRITE32(NFS4_LIMIT_SIZE);
2831 WRITE32(~(u32)0);
2832 WRITE32(~(u32)0);
2833
2834 /*
2835 * TODO: ACE's in delegations
2836 */
2837 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2838 WRITE32(0);
2839 WRITE32(0);
2840 WRITE32(0); /* XXX: is NULL principal ok? */
2841 ADJUST_ARGS();
2842 break;
2843 default:
2844 BUG();
2845 }
2846 /* XXX save filehandle here */
2847out:
f3e42237 2848 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2849 return nfserr;
1da177e4
LT		 2850}
2851
695e12f8 2852static __be32
b37ad28b 2853nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4
LT		 2854{
2855 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2856
2857 if (!nfserr)
2858 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4 2859
f3e42237 2860 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2861 return nfserr;
1da177e4
LT		 2862}
2863
695e12f8 2864static __be32
b37ad28b 2865nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4
LT		 2866{
2867 ENCODE_SEQID_OP_HEAD;
e2f282b9
BH		 2868
2869 if (!nfserr)
2870 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4 2871
f3e42237 2872 encode_seqid_op_tail(resp, save, nfserr);
695e12f8 2873 return nfserr;
1da177e4
LT		 2874}
2875
b37ad28b
AV		 2876static __be32
2877nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2878 struct nfsd4_read *read)
1da177e4
LT		 2879{
2880 u32 eof;
2881 int v, pn;
2882 unsigned long maxcount;
2883 long len;
bc749ca4 2884 __be32 *p;
1da177e4
LT		 2885
2886 if (nfserr)
2887 return nfserr;
2888 if (resp->xbuf->page_len)
2889 return nfserr_resource;
2890
2891 RESERVE_SPACE(8); /* eof flag and byte count */
2892
7adae489 2893 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2894 if (maxcount > read->rd_length)
2895 maxcount = read->rd_length;
2896
2897 len = maxcount;
2898 v = 0;
2899 while (len > 0) {
44524359 2900 pn = resp->rqstp->rq_resused++;
3cc03b16 2901 resp->rqstp->rq_vec[v].iov_base =
44524359 2902 page_address(resp->rqstp->rq_respages[pn]);
3cc03b16 2903 resp->rqstp->rq_vec[v].iov_len =
44524359 2904 len < PAGE_SIZE ? len : PAGE_SIZE;
1da177e4
LT		 2905 v++;
2906 len -= PAGE_SIZE;
2907 }
2908 read->rd_vlen = v;
2909
039a87ca 2910 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2911 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2912 &maxcount);
2913
1da177e4
LT		 2914 if (nfserr)
2915 return nfserr;
44524359
N		 2916 eof = (read->rd_offset + maxcount >=
2917 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2918
2919 WRITE32(eof);
2920 WRITE32(maxcount);
2921 ADJUST_ARGS();
6ed6decc
N		 2922 resp->xbuf->head[0].iov_len = (char*)p
2923 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2924 resp->xbuf->page_len = maxcount;
2925
6ed6decc 2926 /* Use rest of head for padding and remaining ops: */
6ed6decc 2927 resp->xbuf->tail[0].iov_base = p;
1da177e4 2928 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2929 if (maxcount&3) {
6ed6decc
N		 2930 RESERVE_SPACE(4);
2931 WRITE32(0);
1da177e4
LT		 2932 resp->xbuf->tail[0].iov_base += maxcount&3;
2933 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2934 ADJUST_ARGS();
1da177e4
LT		 2935 }
2936 return 0;
2937}
2938
b37ad28b
AV		 2939static __be32
2940nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 2941{
2942 int maxcount;
2943 char *page;
bc749ca4 2944 __be32 *p;
1da177e4
LT		 2945
2946 if (nfserr)
2947 return nfserr;
2948 if (resp->xbuf->page_len)
2949 return nfserr_resource;
2950
44524359 2951 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 2952
2953 maxcount = PAGE_SIZE;
2954 RESERVE_SPACE(4);
2955
2956 /*
2957 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2958 * if they would overflow the buffer. Is this kosher in NFSv4? If
2959 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2960 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2961 */
2962 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2963 if (nfserr == nfserr_isdir)
2964 return nfserr_inval;
2965 if (nfserr)
2966 return nfserr;
2967
2968 WRITE32(maxcount);
2969 ADJUST_ARGS();
6ed6decc
N		 2970 resp->xbuf->head[0].iov_len = (char*)p
2971 - (char*)resp->xbuf->head[0].iov_base;
2972 resp->xbuf->page_len = maxcount;
1da177e4 2973
6ed6decc 2974 /* Use rest of head for padding and remaining ops: */
6ed6decc 2975 resp->xbuf->tail[0].iov_base = p;
1da177e4 2976 resp->xbuf->tail[0].iov_len = 0;
1da177e4 2977 if (maxcount&3) {
6ed6decc
N		 2978 RESERVE_SPACE(4);
2979 WRITE32(0);
1da177e4
LT		 2980 resp->xbuf->tail[0].iov_base += maxcount&3;
2981 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 2982 ADJUST_ARGS();
1da177e4
LT		 2983 }
2984 return 0;
2985}
2986
b37ad28b
AV		 2987static __be32
2988nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 2989{
2990 int maxcount;
2991 loff_t offset;
2ebbc012 2992 __be32 *page, *savep, *tailbase;
bc749ca4 2993 __be32 *p;
1da177e4
LT		 2994
2995 if (nfserr)
2996 return nfserr;
2997 if (resp->xbuf->page_len)
2998 return nfserr_resource;
2999
3000 RESERVE_SPACE(8); /* verifier */
3001 savep = p;
3002
3003 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3004 WRITE32(0);
3005 WRITE32(0);
3006 ADJUST_ARGS();
3007 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 3008 tailbase = p;
1da177e4
LT		 3009
3010 maxcount = PAGE_SIZE;
3011 if (maxcount > readdir->rd_maxcount)
3012 maxcount = readdir->rd_maxcount;
3013
3014 /*
3015 * Convert from bytes to words, account for the two words already
3016 * written, make sure to leave two words at the end for the next
3017 * pointer and eof field.
3018 */
3019 maxcount = (maxcount >> 2) - 4;
3020 if (maxcount < 0) {
3021 nfserr = nfserr_toosmall;
3022 goto err_no_verf;
3023 }
3024
44524359 3025 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
1da177e4
LT		 3026 readdir->common.err = 0;
3027 readdir->buflen = maxcount;
3028 readdir->buffer = page;
3029 readdir->offset = NULL;
3030
3031 offset = readdir->rd_cookie;
3032 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3033 &offset,
3034 &readdir->common, nfsd4_encode_dirent);
3035 if (nfserr == nfs_ok &&
3036 readdir->common.err == nfserr_toosmall &&
3037 readdir->buffer == page)
3038 nfserr = nfserr_toosmall;
1da177e4
LT		 3039 if (nfserr)
3040 goto err_no_verf;
3041
3042 if (readdir->offset)
3043 xdr_encode_hyper(readdir->offset, offset);
3044
3045 p = readdir->buffer;
3046 *p++ = 0; /* no more entries */
3047 *p++ = htonl(readdir->common.err == nfserr_eof);
44524359
N		 3048 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
3049 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
1da177e4 3050
bb6e8a9f 3051 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 3052 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 3053 resp->xbuf->tail[0].iov_len = 0;
3054 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 3055 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 3056
3057 return 0;
3058err_no_verf:
3059 p = savep;
3060 ADJUST_ARGS();
3061 return nfserr;
3062}
3063
695e12f8 3064static __be32
b37ad28b 3065nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3066{
bc749ca4 3067 __be32 *p;
1da177e4
LT		 3068
3069 if (!nfserr) {
3070 RESERVE_SPACE(20);
c654b8a9 3071 write_cinfo(&p, &remove->rm_cinfo);
1da177e4
LT		 3072 ADJUST_ARGS();
3073 }
695e12f8 3074 return nfserr;
1da177e4
LT		 3075}
3076
695e12f8 3077static __be32
b37ad28b 3078nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3079{
bc749ca4 3080 __be32 *p;
1da177e4
LT		 3081
3082 if (!nfserr) {
3083 RESERVE_SPACE(40);
c654b8a9
BF		 3084 write_cinfo(&p, &rename->rn_sinfo);
3085 write_cinfo(&p, &rename->rn_tinfo);
1da177e4
LT		 3086 ADJUST_ARGS();
3087 }
695e12f8 3088 return nfserr;
1da177e4
LT		 3089}
3090
695e12f8 3091static __be32
22b6dee8
MJ		 3092nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
3093 __be32 nfserr,struct svc_export *exp)
dcb488a3
AA		 3094{
3095 int i = 0;
4796f457
BF		 3096 u32 nflavs;
3097 struct exp_flavor_info *flavs;
3098 struct exp_flavor_info def_flavs[2];
bc749ca4 3099 __be32 *p;
dcb488a3
AA		 3100
3101 if (nfserr)
3102 goto out;
4796f457
BF		 3103 if (exp->ex_nflavors) {
3104 flavs = exp->ex_flavors;
3105 nflavs = exp->ex_nflavors;
3106 } else { /* Handling of some defaults in absence of real secinfo: */
3107 flavs = def_flavs;
3108 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3109 nflavs = 2;
3110 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3111 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3112 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3113 nflavs = 1;
3114 flavs[0].pseudoflavor
3115 = svcauth_gss_flavor(exp->ex_client);
3116 } else {
3117 nflavs = 1;
3118 flavs[0].pseudoflavor
3119 = exp->ex_client->flavour->flavour;
3120 }
3121 }
3122
dcb488a3 3123 RESERVE_SPACE(4);
4796f457 3124 WRITE32(nflavs);
dcb488a3 3125 ADJUST_ARGS();
4796f457
BF		 3126 for (i = 0; i < nflavs; i++) {
3127 u32 flav = flavs[i].pseudoflavor;
dcb488a3
AA		 3128 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
3129
3130 if (gm) {
3131 RESERVE_SPACE(4);
3132 WRITE32(RPC_AUTH_GSS);
3133 ADJUST_ARGS();
3134 RESERVE_SPACE(4 + gm->gm_oid.len);
3135 WRITE32(gm->gm_oid.len);
3136 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
3137 ADJUST_ARGS();
3138 RESERVE_SPACE(4);
3139 WRITE32(0); /* qop */
3140 ADJUST_ARGS();
3141 RESERVE_SPACE(4);
3142 WRITE32(gss_pseudoflavor_to_service(gm, flav));
3143 ADJUST_ARGS();
3144 gss_mech_put(gm);
3145 } else {
3146 RESERVE_SPACE(4);
3147 WRITE32(flav);
3148 ADJUST_ARGS();
3149 }
3150 }
3151out:
3152 if (exp)
3153 exp_put(exp);
695e12f8 3154 return nfserr;
dcb488a3
AA		 3155}
3156
22b6dee8
MJ		 3157static __be32
3158nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3159 struct nfsd4_secinfo *secinfo)
3160{
3161 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3162}
3163
3164static __be32
3165nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3166 struct nfsd4_secinfo_no_name *secinfo)
3167{
3168 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3169}
3170
1da177e4
LT		 3171/*
3172 * The SETATTR encode routine is special -- it always encodes a bitmap,
3173 * regardless of the error status.
3174 */
695e12f8 3175static __be32
b37ad28b 3176nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3177{
bc749ca4 3178 __be32 *p;
1da177e4
LT		 3179
3180 RESERVE_SPACE(12);
3181 if (nfserr) {
3182 WRITE32(2);
3183 WRITE32(0);
3184 WRITE32(0);
3185 }
3186 else {
3187 WRITE32(2);
3188 WRITE32(setattr->sa_bmval[0]);
3189 WRITE32(setattr->sa_bmval[1]);
3190 }
3191 ADJUST_ARGS();
695e12f8 3192 return nfserr;
1da177e4
LT		 3193}
3194
695e12f8 3195static __be32
b37ad28b 3196nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3197{
bc749ca4 3198 __be32 *p;
1da177e4
LT		 3199
3200 if (!nfserr) {
3201 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
3202 WRITEMEM(&scd->se_clientid, 8);
3203 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
3204 ADJUST_ARGS();
3205 }
3206 else if (nfserr == nfserr_clid_inuse) {
3207 RESERVE_SPACE(8);
3208 WRITE32(0);
3209 WRITE32(0);
3210 ADJUST_ARGS();
3211 }
695e12f8 3212 return nfserr;
1da177e4
LT		 3213}
3214
695e12f8 3215static __be32
b37ad28b 3216nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3217{
bc749ca4 3218 __be32 *p;
1da177e4
LT		 3219
3220 if (!nfserr) {
3221 RESERVE_SPACE(16);
3222 WRITE32(write->wr_bytes_written);
3223 WRITE32(write->wr_how_written);
3224 WRITEMEM(write->wr_verifier.data, 8);
3225 ADJUST_ARGS();
3226 }
695e12f8 3227 return nfserr;
1da177e4
LT		 3228}
3229
2db134eb
AA		 3230static __be32
3231nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
3232 struct nfsd4_exchange_id *exid)
3233{
bc749ca4 3234 __be32 *p;
0733d213
AA		 3235 char *major_id;
3236 char *server_scope;
3237 int major_id_sz;
3238 int server_scope_sz;
3239 uint64_t minor_id = 0;
3240
3241 if (nfserr)
3242 return nfserr;
3243
3244 major_id = utsname()->nodename;
3245 major_id_sz = strlen(major_id);
3246 server_scope = utsname()->nodename;
3247 server_scope_sz = strlen(server_scope);
3248
3249 RESERVE_SPACE(
3250 8 /* eir_clientid */ +
3251 4 /* eir_sequenceid */ +
3252 4 /* eir_flags */ +
3253 4 /* spr_how (SP4_NONE) */ +
3254 8 /* so_minor_id */ +
3255 4 /* so_major_id.len */ +
3256 (XDR_QUADLEN(major_id_sz) * 4) +
3257 4 /* eir_server_scope.len */ +
3258 (XDR_QUADLEN(server_scope_sz) * 4) +
3259 4 /* eir_server_impl_id.count (0) */);
3260
3261 WRITEMEM(&exid->clientid, 8);
3262 WRITE32(exid->seqid);
3263 WRITE32(exid->flags);
3264
3265 /* state_protect4_r. Currently only support SP4_NONE */
3266 BUG_ON(exid->spa_how != SP4_NONE);
3267 WRITE32(exid->spa_how);
3268
3269 /* The server_owner struct */
3270 WRITE64(minor_id); /* Minor id */
3271 /* major id */
3272 WRITE32(major_id_sz);
3273 WRITEMEM(major_id, major_id_sz);
3274
3275 /* Server scope */
3276 WRITE32(server_scope_sz);
3277 WRITEMEM(server_scope, server_scope_sz);
3278
3279 /* Implementation id */
3280 WRITE32(0); /* zero length nfs_impl_id4 array */
3281 ADJUST_ARGS();
3282 return 0;
2db134eb
AA		 3283}
3284
3285static __be32
3286nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
3287 struct nfsd4_create_session *sess)
3288{
bc749ca4 3289 __be32 *p;
ec6b5d7b
AA		 3290
3291 if (nfserr)
3292 return nfserr;
3293
3294 RESERVE_SPACE(24);
3295 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3296 WRITE32(sess->seqid);
3297 WRITE32(sess->flags);
3298 ADJUST_ARGS();
3299
3300 RESERVE_SPACE(28);
3301 WRITE32(0); /* headerpadsz */
3302 WRITE32(sess->fore_channel.maxreq_sz);
3303 WRITE32(sess->fore_channel.maxresp_sz);
3304 WRITE32(sess->fore_channel.maxresp_cached);
3305 WRITE32(sess->fore_channel.maxops);
3306 WRITE32(sess->fore_channel.maxreqs);
3307 WRITE32(sess->fore_channel.nr_rdma_attrs);
3308 ADJUST_ARGS();
3309
3310 if (sess->fore_channel.nr_rdma_attrs) {
3311 RESERVE_SPACE(4);
3312 WRITE32(sess->fore_channel.rdma_attrs);
3313 ADJUST_ARGS();
3314 }
3315
3316 RESERVE_SPACE(28);
3317 WRITE32(0); /* headerpadsz */
3318 WRITE32(sess->back_channel.maxreq_sz);
3319 WRITE32(sess->back_channel.maxresp_sz);
3320 WRITE32(sess->back_channel.maxresp_cached);
3321 WRITE32(sess->back_channel.maxops);
3322 WRITE32(sess->back_channel.maxreqs);
3323 WRITE32(sess->back_channel.nr_rdma_attrs);
3324 ADJUST_ARGS();
3325
3326 if (sess->back_channel.nr_rdma_attrs) {
3327 RESERVE_SPACE(4);
3328 WRITE32(sess->back_channel.rdma_attrs);
3329 ADJUST_ARGS();
3330 }
3331 return 0;
2db134eb
AA		 3332}
3333
3334static __be32
3335nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3336 struct nfsd4_destroy_session *destroy_session)
3337{
2db134eb
AA		 3338 return nfserr;
3339}
3340
e1ca12df
BS		 3341static __be32
3342nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, int nfserr,
3343 struct nfsd4_free_stateid *free_stateid)
3344{
3345 __be32 *p;
3346
3347 if (nfserr)
3348 return nfserr;
3349
3350 RESERVE_SPACE(4);
3351 WRITE32(nfserr);
3352 ADJUST_ARGS();
3353 return nfserr;
3354}
3355
c47d832b 3356static __be32
2db134eb
AA		 3357nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3358 struct nfsd4_sequence *seq)
3359{
bc749ca4 3360 __be32 *p;
b85d4c01
BH		 3361
3362 if (nfserr)
3363 return nfserr;
3364
3365 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3366 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3367 WRITE32(seq->seqid);
3368 WRITE32(seq->slotid);
b7d7ca35
BF		 3369 /* Note slotid's are numbered from zero: */
3370 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3371 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
0d7bb719 3372 WRITE32(seq->status_flags);
b85d4c01
BH		 3373
3374 ADJUST_ARGS();
557ce264 3375 resp->cstate.datap = p; /* DRC cache data pointer */
b85d4c01 3376 return 0;
2db134eb
AA		 3377}
3378
17456804
BS		 3379__be32
3380nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, int nfserr,
3381 struct nfsd4_test_stateid *test_stateid)
3382{
3383 struct nfsd4_compoundargs *argp;
38c2f4b1 3384 struct nfs4_client *cl = resp->cstate.session->se_client;
17456804
BS		 3385 stateid_t si;
3386 __be32 *p;
3387 int i;
3388 int valid;
3389
3390 restore_buf(test_stateid->ts_saved_args, &test_stateid->ts_savedp);
3391 argp = test_stateid->ts_saved_args;
3392
3393 RESERVE_SPACE(4);
3394 *p++ = htonl(test_stateid->ts_num_ids);
3395 resp->p = p;
3396
3397 nfs4_lock_state();
3398 for (i = 0; i < test_stateid->ts_num_ids; i++) {
3399 nfsd4_decode_stateid(argp, &si);
38c2f4b1 3400 valid = nfs4_validate_stateid(cl, &si);
17456804
BS		 3401 RESERVE_SPACE(4);
3402 *p++ = htonl(valid);
3403 resp->p = p;
3404 }
3405 nfs4_unlock_state();
3406
3407 return nfserr;
3408}
3409
695e12f8
BH		 3410static __be32
3411nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3412{
3413 return nfserr;
3414}
3415
3416typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3417
2db134eb
AA		 3418/*
3419 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3420 * since we don't need to filter out obsolete ops as this is
3421 * done in the decoding phase.
3422 */
695e12f8 3423static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3424 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3425 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3426 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3427 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3428 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3429 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3430 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3431 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3432 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3433 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3434 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3435 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3436 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3437 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3438 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3439 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3440 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3441 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3442 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3443 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3444 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3445 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3446 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3447 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3448 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3449 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3450 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3451 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3452 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3453 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3454 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3455 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3456 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3457 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3458 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3459 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3460 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3461
3462 /* NFSv4.1 operations */
3463 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3464 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3465 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3466 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3467 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
e1ca12df 3468 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
2db134eb
AA		 3469 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3470 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3471 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3472 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3473 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3474 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3475 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3476 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3477 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3478 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3479 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3480 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3481 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3482};
3483
496c262c
AA		 3484/*
3485 * Calculate the total amount of memory that the compound response has taken
58e7b33a 3486 * after encoding the current operation with pad.
496c262c 3487 *
58e7b33a
MJ		 3488 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3489 * which was specified at nfsd4_operation, else pad is zero.
496c262c 3490 *
58e7b33a 3491 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
496c262c
AA		 3492 *
3493 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3494 * will be at least a page and will therefore hold the xdr_buf head.
3495 */
58e7b33a 3496int nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
496c262c 3497{
496c262c 3498 struct xdr_buf *xb = &resp->rqstp->rq_res;
496c262c
AA		 3499 struct nfsd4_session *session = NULL;
3500 struct nfsd4_slot *slot = resp->cstate.slot;
58e7b33a 3501 u32 length, tlen = 0;
496c262c
AA		 3502
3503 if (!nfsd4_has_session(&resp->cstate))
58e7b33a 3504 return 0;
496c262c
AA		 3505
3506 session = resp->cstate.session;
58e7b33a
MJ		 3507 if (session == NULL)
3508 return 0;
496c262c
AA		 3509
3510 if (xb->page_len == 0) {
3511 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3512 } else {
3513 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3514 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3515
3516 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3517 }
3518 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3519 length, xb->page_len, tlen, pad);
3520
58e7b33a
MJ		 3521 if (length > session->se_fchannel.maxresp_sz)
3522 return nfserr_rep_too_big;
3523
3524 if (slot->sl_cachethis == 1 &&
3525 length > session->se_fchannel.maxresp_cached)
496c262c 3526 return nfserr_rep_too_big_to_cache;
58e7b33a
MJ		 3527
3528 return 0;
496c262c
AA		 3529}
3530
1da177e4
LT		 3531void
3532nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3533{
2ebbc012 3534 __be32 *statp;
bc749ca4 3535 __be32 *p;
1da177e4
LT		 3536
3537 RESERVE_SPACE(8);
3538 WRITE32(op->opnum);
3539 statp = p++; /* to be backfilled at the end */
3540 ADJUST_ARGS();
3541
695e12f8
BH		 3542 if (op->opnum == OP_ILLEGAL)
3543 goto status;
3544 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3545 !nfsd4_enc_ops[op->opnum]);
3546 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
496c262c 3547 /* nfsd4_check_drc_limit guarantees enough room for error status */
58e7b33a
MJ		 3548 if (!op->status)
3549 op->status = nfsd4_check_resp_size(resp, 0);
695e12f8 3550status:
1da177e4
LT		 3551 /*
3552 * Note: We write the status directly, instead of using WRITE32(),
3553 * since it is already in network byte order.
3554 */
3555 *statp = op->status;
3556}
3557
3558/*
3559 * Encode the reply stored in the stateowner reply cache
3560 *
3561 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3562 * previously sent already encoded operation.
3563 *
3564 * called with nfs4_lock_state() held
3565 */
3566void
3567nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3568{
bc749ca4 3569 __be32 *p;
1da177e4
LT		 3570 struct nfs4_replay *rp = op->replay;
3571
3572 BUG_ON(!rp);
3573
3574 RESERVE_SPACE(8);
3575 WRITE32(op->opnum);
3576 *p++ = rp->rp_status; /* already xdr'ed */
3577 ADJUST_ARGS();
3578
3579 RESERVE_SPACE(rp->rp_buflen);
3580 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3581 ADJUST_ARGS();
3582}
3583
1da177e4 3584int
2ebbc012 3585nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3586{
3587 return xdr_ressize_check(rqstp, p);
3588}
3589
3e98abff 3590int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3591{
3e98abff
BF		 3592 struct svc_rqst *rqstp = rq;
3593 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3594
1da177e4
LT		 3595 if (args->ops != args->iops) {
3596 kfree(args->ops);
3597 args->ops = args->iops;
3598 }
f99d49ad
JJ		 3599 kfree(args->tmpp);
3600 args->tmpp = NULL;
1da177e4
LT		 3601 while (args->to_free) {
3602 struct tmpbuf *tb = args->to_free;
3603 args->to_free = tb->next;
3604 tb->release(tb->buf);
3605 kfree(tb);
3606 }
3e98abff 3607 return 1;
1da177e4
LT		 3608}
3609
3610int
2ebbc012 3611nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3612{
1da177e4
LT		 3613 args->p = p;
3614 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3615 args->pagelist = rqstp->rq_arg.pages;
3616 args->pagelen = rqstp->rq_arg.page_len;
3617 args->tmpp = NULL;
3618 args->to_free = NULL;
3619 args->ops = args->iops;
3620 args->rqstp = rqstp;
3621
3e98abff 3622 return !nfsd4_decode_compound(args);
1da177e4
LT		 3623}
3624
3625int
2ebbc012 3626nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3627{
3628 /*
3629 * All that remains is to write the tag and operation count...
3630 */
557ce264 3631 struct nfsd4_compound_state *cs = &resp->cstate;
1da177e4
LT		 3632 struct kvec *iov;
3633 p = resp->tagp;
3634 *p++ = htonl(resp->taglen);
3635 memcpy(p, resp->tag, resp->taglen);
3636 p += XDR_QUADLEN(resp->taglen);
3637 *p++ = htonl(resp->opcnt);
3638
3639 if (rqstp->rq_res.page_len)
3640 iov = &rqstp->rq_res.tail[0];
3641 else
3642 iov = &rqstp->rq_res.head[0];
3643 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3644 BUG_ON(iov->iov_len > PAGE_SIZE);
26c0c75e
BF		 3645 if (nfsd4_has_session(cs)) {
3646 if (cs->status != nfserr_replay_cache) {
3647 nfsd4_store_cache_entry(resp);
3648 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
dbd65a7e 3649 cs->slot->sl_inuse = false;
26c0c75e 3650 }
d7682988
BH		 3651 /* Renew the clientid on success and on replay */
3652 release_session_client(cs->session);
76407f76 3653 nfsd4_put_session(cs->session);
da3846a2 3654 }
1da177e4
LT		 3655 return 1;
3656}
3657
3658/*
3659 * Local variables:
3660 * c-basic-offset: 8
3661 * End:
3662 */
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